1 /* ELF executable support for BFD.
3 Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
4 2002, 2003, 2004 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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 char *shstrtab
= NULL
;
258 bfd_size_type shstrtabsize
;
260 i_shdrp
= elf_elfsections (abfd
);
261 if (i_shdrp
== 0 || i_shdrp
[shindex
] == 0)
264 shstrtab
= (char *) 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
;
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 (*_bfd_error_handler
)
295 (_("%s: invalid string offset %u >= %lu for section `%s'"),
296 bfd_archive_filename (abfd
), strindex
, (unsigned long) hdr
->sh_size
,
297 ((shindex
== elf_elfheader(abfd
)->e_shstrndx
298 && strindex
== hdr
->sh_name
)
300 : elf_string_from_elf_strtab (abfd
, 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_local_sym_name (bfd
*abfd
, Elf_Internal_Sym
*isym
)
410 unsigned int iname
= isym
->st_name
;
411 unsigned int shindex
= elf_tdata (abfd
)->symtab_hdr
.sh_link
;
412 if (iname
== 0 && ELF_ST_TYPE (isym
->st_info
) == STT_SECTION
)
414 iname
= elf_elfsections (abfd
)[isym
->st_shndx
]->sh_name
;
415 shindex
= elf_elfheader (abfd
)->e_shstrndx
;
418 return bfd_elf_string_from_elf_section (abfd
, shindex
, iname
);
421 /* Elf_Internal_Shdr->contents is an array of these for SHT_GROUP
422 sections. The first element is the flags, the rest are section
425 typedef union elf_internal_group
{
426 Elf_Internal_Shdr
*shdr
;
428 } Elf_Internal_Group
;
430 /* Return the name of the group signature symbol. Why isn't the
431 signature just a string? */
434 group_signature (bfd
*abfd
, Elf_Internal_Shdr
*ghdr
)
436 Elf_Internal_Shdr
*hdr
;
437 unsigned char esym
[sizeof (Elf64_External_Sym
)];
438 Elf_External_Sym_Shndx eshndx
;
439 Elf_Internal_Sym isym
;
441 /* First we need to ensure the symbol table is available. */
442 if (! bfd_section_from_shdr (abfd
, ghdr
->sh_link
))
445 /* Go read the symbol. */
446 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
447 if (bfd_elf_get_elf_syms (abfd
, hdr
, 1, ghdr
->sh_info
,
448 &isym
, esym
, &eshndx
) == NULL
)
451 return bfd_elf_local_sym_name (abfd
, &isym
);
454 /* Set next_in_group list pointer, and group name for NEWSECT. */
457 setup_group (bfd
*abfd
, Elf_Internal_Shdr
*hdr
, asection
*newsect
)
459 unsigned int num_group
= elf_tdata (abfd
)->num_group
;
461 /* If num_group is zero, read in all SHT_GROUP sections. The count
462 is set to -1 if there are no SHT_GROUP sections. */
465 unsigned int i
, shnum
;
467 /* First count the number of groups. If we have a SHT_GROUP
468 section with just a flag word (ie. sh_size is 4), ignore it. */
469 shnum
= elf_numsections (abfd
);
471 for (i
= 0; i
< shnum
; i
++)
473 Elf_Internal_Shdr
*shdr
= elf_elfsections (abfd
)[i
];
474 if (shdr
->sh_type
== SHT_GROUP
&& shdr
->sh_size
>= 8)
479 num_group
= (unsigned) -1;
480 elf_tdata (abfd
)->num_group
= num_group
;
484 /* We keep a list of elf section headers for group sections,
485 so we can find them quickly. */
486 bfd_size_type amt
= num_group
* sizeof (Elf_Internal_Shdr
*);
487 elf_tdata (abfd
)->group_sect_ptr
= bfd_alloc (abfd
, amt
);
488 if (elf_tdata (abfd
)->group_sect_ptr
== NULL
)
492 for (i
= 0; i
< shnum
; i
++)
494 Elf_Internal_Shdr
*shdr
= elf_elfsections (abfd
)[i
];
495 if (shdr
->sh_type
== SHT_GROUP
&& shdr
->sh_size
>= 8)
498 Elf_Internal_Group
*dest
;
500 /* Add to list of sections. */
501 elf_tdata (abfd
)->group_sect_ptr
[num_group
] = shdr
;
504 /* Read the raw contents. */
505 BFD_ASSERT (sizeof (*dest
) >= 4);
506 amt
= shdr
->sh_size
* sizeof (*dest
) / 4;
507 shdr
->contents
= bfd_alloc (abfd
, amt
);
508 if (shdr
->contents
== NULL
509 || bfd_seek (abfd
, shdr
->sh_offset
, SEEK_SET
) != 0
510 || (bfd_bread (shdr
->contents
, shdr
->sh_size
, abfd
)
514 /* Translate raw contents, a flag word followed by an
515 array of elf section indices all in target byte order,
516 to the flag word followed by an array of elf section
518 src
= shdr
->contents
+ shdr
->sh_size
;
519 dest
= (Elf_Internal_Group
*) (shdr
->contents
+ amt
);
526 idx
= H_GET_32 (abfd
, src
);
527 if (src
== shdr
->contents
)
530 if (shdr
->bfd_section
!= NULL
&& (idx
& GRP_COMDAT
))
531 shdr
->bfd_section
->flags
532 |= SEC_LINK_ONCE
| SEC_LINK_DUPLICATES_DISCARD
;
537 ((*_bfd_error_handler
)
538 (_("%s: invalid SHT_GROUP entry"),
539 bfd_archive_filename (abfd
)));
542 dest
->shdr
= elf_elfsections (abfd
)[idx
];
549 if (num_group
!= (unsigned) -1)
553 for (i
= 0; i
< num_group
; i
++)
555 Elf_Internal_Shdr
*shdr
= elf_tdata (abfd
)->group_sect_ptr
[i
];
556 Elf_Internal_Group
*idx
= (Elf_Internal_Group
*) shdr
->contents
;
557 unsigned int n_elt
= shdr
->sh_size
/ 4;
559 /* Look through this group's sections to see if current
560 section is a member. */
562 if ((++idx
)->shdr
== hdr
)
566 /* We are a member of this group. Go looking through
567 other members to see if any others are linked via
569 idx
= (Elf_Internal_Group
*) shdr
->contents
;
570 n_elt
= shdr
->sh_size
/ 4;
572 if ((s
= (++idx
)->shdr
->bfd_section
) != NULL
573 && elf_next_in_group (s
) != NULL
)
577 /* Snarf the group name from other member, and
578 insert current section in circular list. */
579 elf_group_name (newsect
) = elf_group_name (s
);
580 elf_next_in_group (newsect
) = elf_next_in_group (s
);
581 elf_next_in_group (s
) = newsect
;
587 gname
= group_signature (abfd
, shdr
);
590 elf_group_name (newsect
) = gname
;
592 /* Start a circular list with one element. */
593 elf_next_in_group (newsect
) = newsect
;
596 /* If the group section has been created, point to the
598 if (shdr
->bfd_section
!= NULL
)
599 elf_next_in_group (shdr
->bfd_section
) = newsect
;
607 if (elf_group_name (newsect
) == NULL
)
609 (*_bfd_error_handler
) (_("%s: no group info for section %s"),
610 bfd_archive_filename (abfd
), newsect
->name
);
616 bfd_elf_discard_group (bfd
*abfd ATTRIBUTE_UNUSED
, asection
*group
)
618 asection
*first
= elf_next_in_group (group
);
623 s
->output_section
= bfd_abs_section_ptr
;
624 s
= elf_next_in_group (s
);
625 /* These lists are circular. */
632 /* Make a BFD section from an ELF section. We store a pointer to the
633 BFD section in the bfd_section field of the header. */
636 _bfd_elf_make_section_from_shdr (bfd
*abfd
,
637 Elf_Internal_Shdr
*hdr
,
642 const struct elf_backend_data
*bed
;
644 if (hdr
->bfd_section
!= NULL
)
646 BFD_ASSERT (strcmp (name
,
647 bfd_get_section_name (abfd
, hdr
->bfd_section
)) == 0);
651 newsect
= bfd_make_section_anyway (abfd
, name
);
655 /* Always use the real type/flags. */
656 elf_section_type (newsect
) = hdr
->sh_type
;
657 elf_section_flags (newsect
) = hdr
->sh_flags
;
659 newsect
->filepos
= hdr
->sh_offset
;
661 if (! bfd_set_section_vma (abfd
, newsect
, hdr
->sh_addr
)
662 || ! bfd_set_section_size (abfd
, newsect
, hdr
->sh_size
)
663 || ! bfd_set_section_alignment (abfd
, newsect
,
664 bfd_log2 ((bfd_vma
) hdr
->sh_addralign
)))
667 flags
= SEC_NO_FLAGS
;
668 if (hdr
->sh_type
!= SHT_NOBITS
)
669 flags
|= SEC_HAS_CONTENTS
;
670 if (hdr
->sh_type
== SHT_GROUP
)
671 flags
|= SEC_GROUP
| SEC_EXCLUDE
;
672 if ((hdr
->sh_flags
& SHF_ALLOC
) != 0)
675 if (hdr
->sh_type
!= SHT_NOBITS
)
678 if ((hdr
->sh_flags
& SHF_WRITE
) == 0)
679 flags
|= SEC_READONLY
;
680 if ((hdr
->sh_flags
& SHF_EXECINSTR
) != 0)
682 else if ((flags
& SEC_LOAD
) != 0)
684 if ((hdr
->sh_flags
& SHF_MERGE
) != 0)
687 newsect
->entsize
= hdr
->sh_entsize
;
688 if ((hdr
->sh_flags
& SHF_STRINGS
) != 0)
689 flags
|= SEC_STRINGS
;
691 if (hdr
->sh_flags
& SHF_GROUP
)
692 if (!setup_group (abfd
, hdr
, newsect
))
694 if ((hdr
->sh_flags
& SHF_TLS
) != 0)
695 flags
|= SEC_THREAD_LOCAL
;
697 /* The debugging sections appear to be recognized only by name, not
700 static const char *debug_sec_names
[] =
709 for (i
= ARRAY_SIZE (debug_sec_names
); i
--;)
710 if (strncmp (name
, debug_sec_names
[i
], strlen (debug_sec_names
[i
])) == 0)
714 flags
|= SEC_DEBUGGING
;
717 /* As a GNU extension, if the name begins with .gnu.linkonce, we
718 only link a single copy of the section. This is used to support
719 g++. g++ will emit each template expansion in its own section.
720 The symbols will be defined as weak, so that multiple definitions
721 are permitted. The GNU linker extension is to actually discard
722 all but one of the sections. */
723 if (strncmp (name
, ".gnu.linkonce", sizeof ".gnu.linkonce" - 1) == 0
724 && elf_next_in_group (newsect
) == NULL
)
725 flags
|= SEC_LINK_ONCE
| SEC_LINK_DUPLICATES_DISCARD
;
727 bed
= get_elf_backend_data (abfd
);
728 if (bed
->elf_backend_section_flags
)
729 if (! bed
->elf_backend_section_flags (&flags
, hdr
))
732 if (! bfd_set_section_flags (abfd
, newsect
, flags
))
735 if ((flags
& SEC_ALLOC
) != 0)
737 Elf_Internal_Phdr
*phdr
;
740 /* Look through the phdrs to see if we need to adjust the lma.
741 If all the p_paddr fields are zero, we ignore them, since
742 some ELF linkers produce such output. */
743 phdr
= elf_tdata (abfd
)->phdr
;
744 for (i
= 0; i
< elf_elfheader (abfd
)->e_phnum
; i
++, phdr
++)
746 if (phdr
->p_paddr
!= 0)
749 if (i
< elf_elfheader (abfd
)->e_phnum
)
751 phdr
= elf_tdata (abfd
)->phdr
;
752 for (i
= 0; i
< elf_elfheader (abfd
)->e_phnum
; i
++, phdr
++)
754 /* This section is part of this segment if its file
755 offset plus size lies within the segment's memory
756 span and, if the section is loaded, the extent of the
757 loaded data lies within the extent of the segment.
759 Note - we used to check the p_paddr field as well, and
760 refuse to set the LMA if it was 0. This is wrong
761 though, as a perfectly valid initialised segment can
762 have a p_paddr of zero. Some architectures, eg ARM,
763 place special significance on the address 0 and
764 executables need to be able to have a segment which
765 covers this address. */
766 if (phdr
->p_type
== PT_LOAD
767 && (bfd_vma
) hdr
->sh_offset
>= phdr
->p_offset
768 && (hdr
->sh_offset
+ hdr
->sh_size
769 <= phdr
->p_offset
+ phdr
->p_memsz
)
770 && ((flags
& SEC_LOAD
) == 0
771 || (hdr
->sh_offset
+ hdr
->sh_size
772 <= phdr
->p_offset
+ phdr
->p_filesz
)))
774 if ((flags
& SEC_LOAD
) == 0)
775 newsect
->lma
= (phdr
->p_paddr
776 + hdr
->sh_addr
- phdr
->p_vaddr
);
778 /* We used to use the same adjustment for SEC_LOAD
779 sections, but that doesn't work if the segment
780 is packed with code from multiple VMAs.
781 Instead we calculate the section LMA based on
782 the segment LMA. It is assumed that the
783 segment will contain sections with contiguous
784 LMAs, even if the VMAs are not. */
785 newsect
->lma
= (phdr
->p_paddr
786 + hdr
->sh_offset
- phdr
->p_offset
);
788 /* With contiguous segments, we can't tell from file
789 offsets whether a section with zero size should
790 be placed at the end of one segment or the
791 beginning of the next. Decide based on vaddr. */
792 if (hdr
->sh_addr
>= phdr
->p_vaddr
793 && (hdr
->sh_addr
+ hdr
->sh_size
794 <= phdr
->p_vaddr
+ phdr
->p_memsz
))
801 hdr
->bfd_section
= newsect
;
802 elf_section_data (newsect
)->this_hdr
= *hdr
;
812 struct elf_internal_shdr *bfd_elf_find_section (bfd *abfd, char *name);
815 Helper functions for GDB to locate the string tables.
816 Since BFD hides string tables from callers, GDB needs to use an
817 internal hook to find them. Sun's .stabstr, in particular,
818 isn't even pointed to by the .stab section, so ordinary
819 mechanisms wouldn't work to find it, even if we had some.
822 struct elf_internal_shdr
*
823 bfd_elf_find_section (bfd
*abfd
, char *name
)
825 Elf_Internal_Shdr
**i_shdrp
;
830 i_shdrp
= elf_elfsections (abfd
);
833 shstrtab
= bfd_elf_get_str_section (abfd
,
834 elf_elfheader (abfd
)->e_shstrndx
);
835 if (shstrtab
!= NULL
)
837 max
= elf_numsections (abfd
);
838 for (i
= 1; i
< max
; i
++)
839 if (!strcmp (&shstrtab
[i_shdrp
[i
]->sh_name
], name
))
846 const char *const bfd_elf_section_type_names
[] = {
847 "SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB",
848 "SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE",
849 "SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM",
852 /* ELF relocs are against symbols. If we are producing relocatable
853 output, and the reloc is against an external symbol, and nothing
854 has given us any additional addend, the resulting reloc will also
855 be against the same symbol. In such a case, we don't want to
856 change anything about the way the reloc is handled, since it will
857 all be done at final link time. Rather than put special case code
858 into bfd_perform_relocation, all the reloc types use this howto
859 function. It just short circuits the reloc if producing
860 relocatable output against an external symbol. */
862 bfd_reloc_status_type
863 bfd_elf_generic_reloc (bfd
*abfd ATTRIBUTE_UNUSED
,
864 arelent
*reloc_entry
,
866 void *data ATTRIBUTE_UNUSED
,
867 asection
*input_section
,
869 char **error_message ATTRIBUTE_UNUSED
)
871 if (output_bfd
!= NULL
872 && (symbol
->flags
& BSF_SECTION_SYM
) == 0
873 && (! reloc_entry
->howto
->partial_inplace
874 || reloc_entry
->addend
== 0))
876 reloc_entry
->address
+= input_section
->output_offset
;
880 return bfd_reloc_continue
;
883 /* Make sure sec_info_type is cleared if sec_info is cleared too. */
886 merge_sections_remove_hook (bfd
*abfd ATTRIBUTE_UNUSED
,
889 BFD_ASSERT (sec
->sec_info_type
== ELF_INFO_TYPE_MERGE
);
890 sec
->sec_info_type
= ELF_INFO_TYPE_NONE
;
893 /* Finish SHF_MERGE section merging. */
896 _bfd_elf_merge_sections (bfd
*abfd
, struct bfd_link_info
*info
)
898 if (!is_elf_hash_table (info
->hash
))
900 if (elf_hash_table (info
)->merge_info
)
901 _bfd_merge_sections (abfd
, elf_hash_table (info
)->merge_info
,
902 merge_sections_remove_hook
);
907 _bfd_elf_link_just_syms (asection
*sec
, struct bfd_link_info
*info
)
909 sec
->output_section
= bfd_abs_section_ptr
;
910 sec
->output_offset
= sec
->vma
;
911 if (!is_elf_hash_table (info
->hash
))
914 sec
->sec_info_type
= ELF_INFO_TYPE_JUST_SYMS
;
917 /* Copy the program header and other data from one object module to
921 _bfd_elf_copy_private_bfd_data (bfd
*ibfd
, bfd
*obfd
)
923 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
924 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
927 BFD_ASSERT (!elf_flags_init (obfd
)
928 || (elf_elfheader (obfd
)->e_flags
929 == elf_elfheader (ibfd
)->e_flags
));
931 elf_gp (obfd
) = elf_gp (ibfd
);
932 elf_elfheader (obfd
)->e_flags
= elf_elfheader (ibfd
)->e_flags
;
933 elf_flags_init (obfd
) = TRUE
;
937 /* Print out the program headers. */
940 _bfd_elf_print_private_bfd_data (bfd
*abfd
, void *farg
)
943 Elf_Internal_Phdr
*p
;
945 bfd_byte
*dynbuf
= NULL
;
947 p
= elf_tdata (abfd
)->phdr
;
952 fprintf (f
, _("\nProgram Header:\n"));
953 c
= elf_elfheader (abfd
)->e_phnum
;
954 for (i
= 0; i
< c
; i
++, p
++)
961 case PT_NULL
: pt
= "NULL"; break;
962 case PT_LOAD
: pt
= "LOAD"; break;
963 case PT_DYNAMIC
: pt
= "DYNAMIC"; break;
964 case PT_INTERP
: pt
= "INTERP"; break;
965 case PT_NOTE
: pt
= "NOTE"; break;
966 case PT_SHLIB
: pt
= "SHLIB"; break;
967 case PT_PHDR
: pt
= "PHDR"; break;
968 case PT_TLS
: pt
= "TLS"; break;
969 case PT_GNU_EH_FRAME
: pt
= "EH_FRAME"; break;
970 case PT_GNU_STACK
: pt
= "STACK"; break;
971 default: sprintf (buf
, "0x%lx", p
->p_type
); pt
= buf
; break;
973 fprintf (f
, "%8s off 0x", pt
);
974 bfd_fprintf_vma (abfd
, f
, p
->p_offset
);
975 fprintf (f
, " vaddr 0x");
976 bfd_fprintf_vma (abfd
, f
, p
->p_vaddr
);
977 fprintf (f
, " paddr 0x");
978 bfd_fprintf_vma (abfd
, f
, p
->p_paddr
);
979 fprintf (f
, " align 2**%u\n", bfd_log2 (p
->p_align
));
980 fprintf (f
, " filesz 0x");
981 bfd_fprintf_vma (abfd
, f
, p
->p_filesz
);
982 fprintf (f
, " memsz 0x");
983 bfd_fprintf_vma (abfd
, f
, p
->p_memsz
);
984 fprintf (f
, " flags %c%c%c",
985 (p
->p_flags
& PF_R
) != 0 ? 'r' : '-',
986 (p
->p_flags
& PF_W
) != 0 ? 'w' : '-',
987 (p
->p_flags
& PF_X
) != 0 ? 'x' : '-');
988 if ((p
->p_flags
&~ (unsigned) (PF_R
| PF_W
| PF_X
)) != 0)
989 fprintf (f
, " %lx", p
->p_flags
&~ (unsigned) (PF_R
| PF_W
| PF_X
));
994 s
= bfd_get_section_by_name (abfd
, ".dynamic");
998 unsigned long shlink
;
999 bfd_byte
*extdyn
, *extdynend
;
1001 void (*swap_dyn_in
) (bfd
*, const void *, Elf_Internal_Dyn
*);
1003 fprintf (f
, _("\nDynamic Section:\n"));
1005 dynbuf
= bfd_malloc (s
->_raw_size
);
1008 if (! bfd_get_section_contents (abfd
, s
, dynbuf
, 0, s
->_raw_size
))
1011 elfsec
= _bfd_elf_section_from_bfd_section (abfd
, s
);
1014 shlink
= elf_elfsections (abfd
)[elfsec
]->sh_link
;
1016 extdynsize
= get_elf_backend_data (abfd
)->s
->sizeof_dyn
;
1017 swap_dyn_in
= get_elf_backend_data (abfd
)->s
->swap_dyn_in
;
1020 extdynend
= extdyn
+ s
->_raw_size
;
1021 for (; extdyn
< extdynend
; extdyn
+= extdynsize
)
1023 Elf_Internal_Dyn dyn
;
1026 bfd_boolean stringp
;
1028 (*swap_dyn_in
) (abfd
, extdyn
, &dyn
);
1030 if (dyn
.d_tag
== DT_NULL
)
1037 sprintf (ab
, "0x%lx", (unsigned long) dyn
.d_tag
);
1041 case DT_NEEDED
: name
= "NEEDED"; stringp
= TRUE
; break;
1042 case DT_PLTRELSZ
: name
= "PLTRELSZ"; break;
1043 case DT_PLTGOT
: name
= "PLTGOT"; break;
1044 case DT_HASH
: name
= "HASH"; break;
1045 case DT_STRTAB
: name
= "STRTAB"; break;
1046 case DT_SYMTAB
: name
= "SYMTAB"; break;
1047 case DT_RELA
: name
= "RELA"; break;
1048 case DT_RELASZ
: name
= "RELASZ"; break;
1049 case DT_RELAENT
: name
= "RELAENT"; break;
1050 case DT_STRSZ
: name
= "STRSZ"; break;
1051 case DT_SYMENT
: name
= "SYMENT"; break;
1052 case DT_INIT
: name
= "INIT"; break;
1053 case DT_FINI
: name
= "FINI"; break;
1054 case DT_SONAME
: name
= "SONAME"; stringp
= TRUE
; break;
1055 case DT_RPATH
: name
= "RPATH"; stringp
= TRUE
; break;
1056 case DT_SYMBOLIC
: name
= "SYMBOLIC"; break;
1057 case DT_REL
: name
= "REL"; break;
1058 case DT_RELSZ
: name
= "RELSZ"; break;
1059 case DT_RELENT
: name
= "RELENT"; break;
1060 case DT_PLTREL
: name
= "PLTREL"; break;
1061 case DT_DEBUG
: name
= "DEBUG"; break;
1062 case DT_TEXTREL
: name
= "TEXTREL"; break;
1063 case DT_JMPREL
: name
= "JMPREL"; break;
1064 case DT_BIND_NOW
: name
= "BIND_NOW"; break;
1065 case DT_INIT_ARRAY
: name
= "INIT_ARRAY"; break;
1066 case DT_FINI_ARRAY
: name
= "FINI_ARRAY"; break;
1067 case DT_INIT_ARRAYSZ
: name
= "INIT_ARRAYSZ"; break;
1068 case DT_FINI_ARRAYSZ
: name
= "FINI_ARRAYSZ"; break;
1069 case DT_RUNPATH
: name
= "RUNPATH"; stringp
= TRUE
; break;
1070 case DT_FLAGS
: name
= "FLAGS"; break;
1071 case DT_PREINIT_ARRAY
: name
= "PREINIT_ARRAY"; break;
1072 case DT_PREINIT_ARRAYSZ
: name
= "PREINIT_ARRAYSZ"; break;
1073 case DT_CHECKSUM
: name
= "CHECKSUM"; break;
1074 case DT_PLTPADSZ
: name
= "PLTPADSZ"; break;
1075 case DT_MOVEENT
: name
= "MOVEENT"; break;
1076 case DT_MOVESZ
: name
= "MOVESZ"; break;
1077 case DT_FEATURE
: name
= "FEATURE"; break;
1078 case DT_POSFLAG_1
: name
= "POSFLAG_1"; break;
1079 case DT_SYMINSZ
: name
= "SYMINSZ"; break;
1080 case DT_SYMINENT
: name
= "SYMINENT"; break;
1081 case DT_CONFIG
: name
= "CONFIG"; stringp
= TRUE
; break;
1082 case DT_DEPAUDIT
: name
= "DEPAUDIT"; stringp
= TRUE
; break;
1083 case DT_AUDIT
: name
= "AUDIT"; stringp
= TRUE
; break;
1084 case DT_PLTPAD
: name
= "PLTPAD"; break;
1085 case DT_MOVETAB
: name
= "MOVETAB"; break;
1086 case DT_SYMINFO
: name
= "SYMINFO"; break;
1087 case DT_RELACOUNT
: name
= "RELACOUNT"; break;
1088 case DT_RELCOUNT
: name
= "RELCOUNT"; break;
1089 case DT_FLAGS_1
: name
= "FLAGS_1"; break;
1090 case DT_VERSYM
: name
= "VERSYM"; break;
1091 case DT_VERDEF
: name
= "VERDEF"; break;
1092 case DT_VERDEFNUM
: name
= "VERDEFNUM"; break;
1093 case DT_VERNEED
: name
= "VERNEED"; break;
1094 case DT_VERNEEDNUM
: name
= "VERNEEDNUM"; break;
1095 case DT_AUXILIARY
: name
= "AUXILIARY"; stringp
= TRUE
; break;
1096 case DT_USED
: name
= "USED"; break;
1097 case DT_FILTER
: name
= "FILTER"; stringp
= TRUE
; break;
1100 fprintf (f
, " %-11s ", name
);
1102 fprintf (f
, "0x%lx", (unsigned long) dyn
.d_un
.d_val
);
1106 unsigned int tagv
= dyn
.d_un
.d_val
;
1108 string
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
1111 fprintf (f
, "%s", string
);
1120 if ((elf_dynverdef (abfd
) != 0 && elf_tdata (abfd
)->verdef
== NULL
)
1121 || (elf_dynverref (abfd
) != 0 && elf_tdata (abfd
)->verref
== NULL
))
1123 if (! _bfd_elf_slurp_version_tables (abfd
))
1127 if (elf_dynverdef (abfd
) != 0)
1129 Elf_Internal_Verdef
*t
;
1131 fprintf (f
, _("\nVersion definitions:\n"));
1132 for (t
= elf_tdata (abfd
)->verdef
; t
!= NULL
; t
= t
->vd_nextdef
)
1134 fprintf (f
, "%d 0x%2.2x 0x%8.8lx %s\n", t
->vd_ndx
,
1135 t
->vd_flags
, t
->vd_hash
, t
->vd_nodename
);
1136 if (t
->vd_auxptr
->vda_nextptr
!= NULL
)
1138 Elf_Internal_Verdaux
*a
;
1141 for (a
= t
->vd_auxptr
->vda_nextptr
;
1144 fprintf (f
, "%s ", a
->vda_nodename
);
1150 if (elf_dynverref (abfd
) != 0)
1152 Elf_Internal_Verneed
*t
;
1154 fprintf (f
, _("\nVersion References:\n"));
1155 for (t
= elf_tdata (abfd
)->verref
; t
!= NULL
; t
= t
->vn_nextref
)
1157 Elf_Internal_Vernaux
*a
;
1159 fprintf (f
, _(" required from %s:\n"), t
->vn_filename
);
1160 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
1161 fprintf (f
, " 0x%8.8lx 0x%2.2x %2.2d %s\n", a
->vna_hash
,
1162 a
->vna_flags
, a
->vna_other
, a
->vna_nodename
);
1174 /* Display ELF-specific fields of a symbol. */
1177 bfd_elf_print_symbol (bfd
*abfd
,
1180 bfd_print_symbol_type how
)
1185 case bfd_print_symbol_name
:
1186 fprintf (file
, "%s", symbol
->name
);
1188 case bfd_print_symbol_more
:
1189 fprintf (file
, "elf ");
1190 bfd_fprintf_vma (abfd
, file
, symbol
->value
);
1191 fprintf (file
, " %lx", (long) symbol
->flags
);
1193 case bfd_print_symbol_all
:
1195 const char *section_name
;
1196 const char *name
= NULL
;
1197 const struct elf_backend_data
*bed
;
1198 unsigned char st_other
;
1201 section_name
= symbol
->section
? symbol
->section
->name
: "(*none*)";
1203 bed
= get_elf_backend_data (abfd
);
1204 if (bed
->elf_backend_print_symbol_all
)
1205 name
= (*bed
->elf_backend_print_symbol_all
) (abfd
, filep
, symbol
);
1209 name
= symbol
->name
;
1210 bfd_print_symbol_vandf (abfd
, file
, symbol
);
1213 fprintf (file
, " %s\t", section_name
);
1214 /* Print the "other" value for a symbol. For common symbols,
1215 we've already printed the size; now print the alignment.
1216 For other symbols, we have no specified alignment, and
1217 we've printed the address; now print the size. */
1218 if (bfd_is_com_section (symbol
->section
))
1219 val
= ((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_value
;
1221 val
= ((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_size
;
1222 bfd_fprintf_vma (abfd
, file
, val
);
1224 /* If we have version information, print it. */
1225 if (elf_tdata (abfd
)->dynversym_section
!= 0
1226 && (elf_tdata (abfd
)->dynverdef_section
!= 0
1227 || elf_tdata (abfd
)->dynverref_section
!= 0))
1229 unsigned int vernum
;
1230 const char *version_string
;
1232 vernum
= ((elf_symbol_type
*) symbol
)->version
& VERSYM_VERSION
;
1235 version_string
= "";
1236 else if (vernum
== 1)
1237 version_string
= "Base";
1238 else if (vernum
<= elf_tdata (abfd
)->cverdefs
)
1240 elf_tdata (abfd
)->verdef
[vernum
- 1].vd_nodename
;
1243 Elf_Internal_Verneed
*t
;
1245 version_string
= "";
1246 for (t
= elf_tdata (abfd
)->verref
;
1250 Elf_Internal_Vernaux
*a
;
1252 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
1254 if (a
->vna_other
== vernum
)
1256 version_string
= a
->vna_nodename
;
1263 if ((((elf_symbol_type
*) symbol
)->version
& VERSYM_HIDDEN
) == 0)
1264 fprintf (file
, " %-11s", version_string
);
1269 fprintf (file
, " (%s)", version_string
);
1270 for (i
= 10 - strlen (version_string
); i
> 0; --i
)
1275 /* If the st_other field is not zero, print it. */
1276 st_other
= ((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_other
;
1281 case STV_INTERNAL
: fprintf (file
, " .internal"); break;
1282 case STV_HIDDEN
: fprintf (file
, " .hidden"); break;
1283 case STV_PROTECTED
: fprintf (file
, " .protected"); break;
1285 /* Some other non-defined flags are also present, so print
1287 fprintf (file
, " 0x%02x", (unsigned int) st_other
);
1290 fprintf (file
, " %s", name
);
1296 /* Create an entry in an ELF linker hash table. */
1298 struct bfd_hash_entry
*
1299 _bfd_elf_link_hash_newfunc (struct bfd_hash_entry
*entry
,
1300 struct bfd_hash_table
*table
,
1303 /* Allocate the structure if it has not already been allocated by a
1307 entry
= bfd_hash_allocate (table
, sizeof (struct elf_link_hash_entry
));
1312 /* Call the allocation method of the superclass. */
1313 entry
= _bfd_link_hash_newfunc (entry
, table
, string
);
1316 struct elf_link_hash_entry
*ret
= (struct elf_link_hash_entry
*) entry
;
1317 struct elf_link_hash_table
*htab
= (struct elf_link_hash_table
*) table
;
1319 /* Set local fields. */
1322 ret
->dynstr_index
= 0;
1323 ret
->elf_hash_value
= 0;
1324 ret
->weakdef
= NULL
;
1325 ret
->verinfo
.verdef
= NULL
;
1326 ret
->vtable_entries_size
= 0;
1327 ret
->vtable_entries_used
= NULL
;
1328 ret
->vtable_parent
= NULL
;
1329 ret
->got
= htab
->init_refcount
;
1330 ret
->plt
= htab
->init_refcount
;
1332 ret
->type
= STT_NOTYPE
;
1334 /* Assume that we have been called by a non-ELF symbol reader.
1335 This flag is then reset by the code which reads an ELF input
1336 file. This ensures that a symbol created by a non-ELF symbol
1337 reader will have the flag set correctly. */
1338 ret
->elf_link_hash_flags
= ELF_LINK_NON_ELF
;
1344 /* Copy data from an indirect symbol to its direct symbol, hiding the
1345 old indirect symbol. Also used for copying flags to a weakdef. */
1348 _bfd_elf_link_hash_copy_indirect (const struct elf_backend_data
*bed
,
1349 struct elf_link_hash_entry
*dir
,
1350 struct elf_link_hash_entry
*ind
)
1353 bfd_signed_vma lowest_valid
= bed
->can_refcount
;
1355 /* Copy down any references that we may have already seen to the
1356 symbol which just became indirect. */
1358 dir
->elf_link_hash_flags
1359 |= ind
->elf_link_hash_flags
& (ELF_LINK_HASH_REF_DYNAMIC
1360 | ELF_LINK_HASH_REF_REGULAR
1361 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
1362 | ELF_LINK_NON_GOT_REF
1363 | ELF_LINK_HASH_NEEDS_PLT
1364 | ELF_LINK_POINTER_EQUALITY_NEEDED
);
1366 if (ind
->root
.type
!= bfd_link_hash_indirect
)
1369 /* Copy over the global and procedure linkage table refcount entries.
1370 These may have been already set up by a check_relocs routine. */
1371 tmp
= dir
->got
.refcount
;
1372 if (tmp
< lowest_valid
)
1374 dir
->got
.refcount
= ind
->got
.refcount
;
1375 ind
->got
.refcount
= tmp
;
1378 BFD_ASSERT (ind
->got
.refcount
< lowest_valid
);
1380 tmp
= dir
->plt
.refcount
;
1381 if (tmp
< lowest_valid
)
1383 dir
->plt
.refcount
= ind
->plt
.refcount
;
1384 ind
->plt
.refcount
= tmp
;
1387 BFD_ASSERT (ind
->plt
.refcount
< lowest_valid
);
1389 if (dir
->dynindx
== -1)
1391 dir
->dynindx
= ind
->dynindx
;
1392 dir
->dynstr_index
= ind
->dynstr_index
;
1394 ind
->dynstr_index
= 0;
1397 BFD_ASSERT (ind
->dynindx
== -1);
1401 _bfd_elf_link_hash_hide_symbol (struct bfd_link_info
*info
,
1402 struct elf_link_hash_entry
*h
,
1403 bfd_boolean force_local
)
1405 h
->plt
= elf_hash_table (info
)->init_offset
;
1406 h
->elf_link_hash_flags
&= ~ELF_LINK_HASH_NEEDS_PLT
;
1409 h
->elf_link_hash_flags
|= ELF_LINK_FORCED_LOCAL
;
1410 if (h
->dynindx
!= -1)
1413 _bfd_elf_strtab_delref (elf_hash_table (info
)->dynstr
,
1419 /* Initialize an ELF linker hash table. */
1422 _bfd_elf_link_hash_table_init
1423 (struct elf_link_hash_table
*table
,
1425 struct bfd_hash_entry
*(*newfunc
) (struct bfd_hash_entry
*,
1426 struct bfd_hash_table
*,
1431 table
->dynamic_sections_created
= FALSE
;
1432 table
->dynobj
= NULL
;
1433 /* Make sure can_refcount is extended to the width and signedness of
1434 init_refcount before we subtract one from it. */
1435 table
->init_refcount
.refcount
= get_elf_backend_data (abfd
)->can_refcount
;
1436 table
->init_refcount
.refcount
-= 1;
1437 table
->init_offset
.offset
= -(bfd_vma
) 1;
1438 /* The first dynamic symbol is a dummy. */
1439 table
->dynsymcount
= 1;
1440 table
->dynstr
= NULL
;
1441 table
->bucketcount
= 0;
1442 table
->needed
= NULL
;
1444 table
->stab_info
= NULL
;
1445 table
->merge_info
= NULL
;
1446 memset (&table
->eh_info
, 0, sizeof (table
->eh_info
));
1447 table
->dynlocal
= NULL
;
1448 table
->runpath
= NULL
;
1449 table
->tls_sec
= NULL
;
1450 table
->tls_size
= 0;
1451 table
->loaded
= NULL
;
1453 ret
= _bfd_link_hash_table_init (&table
->root
, abfd
, newfunc
);
1454 table
->root
.type
= bfd_link_elf_hash_table
;
1459 /* Create an ELF linker hash table. */
1461 struct bfd_link_hash_table
*
1462 _bfd_elf_link_hash_table_create (bfd
*abfd
)
1464 struct elf_link_hash_table
*ret
;
1465 bfd_size_type amt
= sizeof (struct elf_link_hash_table
);
1467 ret
= bfd_malloc (amt
);
1471 if (! _bfd_elf_link_hash_table_init (ret
, abfd
, _bfd_elf_link_hash_newfunc
))
1480 /* This is a hook for the ELF emulation code in the generic linker to
1481 tell the backend linker what file name to use for the DT_NEEDED
1482 entry for a dynamic object. */
1485 bfd_elf_set_dt_needed_name (bfd
*abfd
, const char *name
)
1487 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1488 && bfd_get_format (abfd
) == bfd_object
)
1489 elf_dt_name (abfd
) = name
;
1493 bfd_elf_set_dyn_lib_class (bfd
*abfd
, int lib_class
)
1495 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1496 && bfd_get_format (abfd
) == bfd_object
)
1497 elf_dyn_lib_class (abfd
) = lib_class
;
1500 /* Get the list of DT_NEEDED entries for a link. This is a hook for
1501 the linker ELF emulation code. */
1503 struct bfd_link_needed_list
*
1504 bfd_elf_get_needed_list (bfd
*abfd ATTRIBUTE_UNUSED
,
1505 struct bfd_link_info
*info
)
1507 if (! is_elf_hash_table (info
->hash
))
1509 return elf_hash_table (info
)->needed
;
1512 /* Get the list of DT_RPATH/DT_RUNPATH entries for a link. This is a
1513 hook for the linker ELF emulation code. */
1515 struct bfd_link_needed_list
*
1516 bfd_elf_get_runpath_list (bfd
*abfd ATTRIBUTE_UNUSED
,
1517 struct bfd_link_info
*info
)
1519 if (! is_elf_hash_table (info
->hash
))
1521 return elf_hash_table (info
)->runpath
;
1524 /* Get the name actually used for a dynamic object for a link. This
1525 is the SONAME entry if there is one. Otherwise, it is the string
1526 passed to bfd_elf_set_dt_needed_name, or it is the filename. */
1529 bfd_elf_get_dt_soname (bfd
*abfd
)
1531 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1532 && bfd_get_format (abfd
) == bfd_object
)
1533 return elf_dt_name (abfd
);
1537 /* Get the list of DT_NEEDED entries from a BFD. This is a hook for
1538 the ELF linker emulation code. */
1541 bfd_elf_get_bfd_needed_list (bfd
*abfd
,
1542 struct bfd_link_needed_list
**pneeded
)
1545 bfd_byte
*dynbuf
= NULL
;
1547 unsigned long shlink
;
1548 bfd_byte
*extdyn
, *extdynend
;
1550 void (*swap_dyn_in
) (bfd
*, const void *, Elf_Internal_Dyn
*);
1554 if (bfd_get_flavour (abfd
) != bfd_target_elf_flavour
1555 || bfd_get_format (abfd
) != bfd_object
)
1558 s
= bfd_get_section_by_name (abfd
, ".dynamic");
1559 if (s
== NULL
|| s
->_raw_size
== 0)
1562 dynbuf
= bfd_malloc (s
->_raw_size
);
1566 if (! bfd_get_section_contents (abfd
, s
, dynbuf
, 0, s
->_raw_size
))
1569 elfsec
= _bfd_elf_section_from_bfd_section (abfd
, s
);
1573 shlink
= elf_elfsections (abfd
)[elfsec
]->sh_link
;
1575 extdynsize
= get_elf_backend_data (abfd
)->s
->sizeof_dyn
;
1576 swap_dyn_in
= get_elf_backend_data (abfd
)->s
->swap_dyn_in
;
1579 extdynend
= extdyn
+ s
->_raw_size
;
1580 for (; extdyn
< extdynend
; extdyn
+= extdynsize
)
1582 Elf_Internal_Dyn dyn
;
1584 (*swap_dyn_in
) (abfd
, extdyn
, &dyn
);
1586 if (dyn
.d_tag
== DT_NULL
)
1589 if (dyn
.d_tag
== DT_NEEDED
)
1592 struct bfd_link_needed_list
*l
;
1593 unsigned int tagv
= dyn
.d_un
.d_val
;
1596 string
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
1601 l
= bfd_alloc (abfd
, amt
);
1622 /* Allocate an ELF string table--force the first byte to be zero. */
1624 struct bfd_strtab_hash
*
1625 _bfd_elf_stringtab_init (void)
1627 struct bfd_strtab_hash
*ret
;
1629 ret
= _bfd_stringtab_init ();
1634 loc
= _bfd_stringtab_add (ret
, "", TRUE
, FALSE
);
1635 BFD_ASSERT (loc
== 0 || loc
== (bfd_size_type
) -1);
1636 if (loc
== (bfd_size_type
) -1)
1638 _bfd_stringtab_free (ret
);
1645 /* ELF .o/exec file reading */
1647 /* Create a new bfd section from an ELF section header. */
1650 bfd_section_from_shdr (bfd
*abfd
, unsigned int shindex
)
1652 Elf_Internal_Shdr
*hdr
= elf_elfsections (abfd
)[shindex
];
1653 Elf_Internal_Ehdr
*ehdr
= elf_elfheader (abfd
);
1654 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
1657 name
= elf_string_from_elf_strtab (abfd
, hdr
->sh_name
);
1659 switch (hdr
->sh_type
)
1662 /* Inactive section. Throw it away. */
1665 case SHT_PROGBITS
: /* Normal section with contents. */
1666 case SHT_NOBITS
: /* .bss section. */
1667 case SHT_HASH
: /* .hash section. */
1668 case SHT_NOTE
: /* .note section. */
1669 case SHT_INIT_ARRAY
: /* .init_array section. */
1670 case SHT_FINI_ARRAY
: /* .fini_array section. */
1671 case SHT_PREINIT_ARRAY
: /* .preinit_array section. */
1672 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1674 case SHT_DYNAMIC
: /* Dynamic linking information. */
1675 if (! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
))
1677 if (elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_STRTAB
)
1679 Elf_Internal_Shdr
*dynsymhdr
;
1681 /* The shared libraries distributed with hpux11 have a bogus
1682 sh_link field for the ".dynamic" section. Find the
1683 string table for the ".dynsym" section instead. */
1684 if (elf_dynsymtab (abfd
) != 0)
1686 dynsymhdr
= elf_elfsections (abfd
)[elf_dynsymtab (abfd
)];
1687 hdr
->sh_link
= dynsymhdr
->sh_link
;
1691 unsigned int i
, num_sec
;
1693 num_sec
= elf_numsections (abfd
);
1694 for (i
= 1; i
< num_sec
; i
++)
1696 dynsymhdr
= elf_elfsections (abfd
)[i
];
1697 if (dynsymhdr
->sh_type
== SHT_DYNSYM
)
1699 hdr
->sh_link
= dynsymhdr
->sh_link
;
1707 case SHT_SYMTAB
: /* A symbol table */
1708 if (elf_onesymtab (abfd
) == shindex
)
1711 BFD_ASSERT (hdr
->sh_entsize
== bed
->s
->sizeof_sym
);
1712 BFD_ASSERT (elf_onesymtab (abfd
) == 0);
1713 elf_onesymtab (abfd
) = shindex
;
1714 elf_tdata (abfd
)->symtab_hdr
= *hdr
;
1715 elf_elfsections (abfd
)[shindex
] = hdr
= &elf_tdata (abfd
)->symtab_hdr
;
1716 abfd
->flags
|= HAS_SYMS
;
1718 /* Sometimes a shared object will map in the symbol table. If
1719 SHF_ALLOC is set, and this is a shared object, then we also
1720 treat this section as a BFD section. We can not base the
1721 decision purely on SHF_ALLOC, because that flag is sometimes
1722 set in a relocatable object file, which would confuse the
1724 if ((hdr
->sh_flags
& SHF_ALLOC
) != 0
1725 && (abfd
->flags
& DYNAMIC
) != 0
1726 && ! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
))
1731 case SHT_DYNSYM
: /* A dynamic symbol table */
1732 if (elf_dynsymtab (abfd
) == shindex
)
1735 BFD_ASSERT (hdr
->sh_entsize
== bed
->s
->sizeof_sym
);
1736 BFD_ASSERT (elf_dynsymtab (abfd
) == 0);
1737 elf_dynsymtab (abfd
) = shindex
;
1738 elf_tdata (abfd
)->dynsymtab_hdr
= *hdr
;
1739 elf_elfsections (abfd
)[shindex
] = hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
1740 abfd
->flags
|= HAS_SYMS
;
1742 /* Besides being a symbol table, we also treat this as a regular
1743 section, so that objcopy can handle it. */
1744 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1746 case SHT_SYMTAB_SHNDX
: /* Symbol section indices when >64k sections */
1747 if (elf_symtab_shndx (abfd
) == shindex
)
1750 /* Get the associated symbol table. */
1751 if (! bfd_section_from_shdr (abfd
, hdr
->sh_link
)
1752 || hdr
->sh_link
!= elf_onesymtab (abfd
))
1755 elf_symtab_shndx (abfd
) = shindex
;
1756 elf_tdata (abfd
)->symtab_shndx_hdr
= *hdr
;
1757 elf_elfsections (abfd
)[shindex
] = &elf_tdata (abfd
)->symtab_shndx_hdr
;
1760 case SHT_STRTAB
: /* A string table */
1761 if (hdr
->bfd_section
!= NULL
)
1763 if (ehdr
->e_shstrndx
== shindex
)
1765 elf_tdata (abfd
)->shstrtab_hdr
= *hdr
;
1766 elf_elfsections (abfd
)[shindex
] = &elf_tdata (abfd
)->shstrtab_hdr
;
1770 unsigned int i
, num_sec
;
1772 num_sec
= elf_numsections (abfd
);
1773 for (i
= 1; i
< num_sec
; i
++)
1775 Elf_Internal_Shdr
*hdr2
= elf_elfsections (abfd
)[i
];
1776 if (hdr2
->sh_link
== shindex
)
1778 if (! bfd_section_from_shdr (abfd
, i
))
1780 if (elf_onesymtab (abfd
) == i
)
1782 elf_tdata (abfd
)->strtab_hdr
= *hdr
;
1783 elf_elfsections (abfd
)[shindex
] =
1784 &elf_tdata (abfd
)->strtab_hdr
;
1787 if (elf_dynsymtab (abfd
) == i
)
1789 elf_tdata (abfd
)->dynstrtab_hdr
= *hdr
;
1790 elf_elfsections (abfd
)[shindex
] = hdr
=
1791 &elf_tdata (abfd
)->dynstrtab_hdr
;
1792 /* We also treat this as a regular section, so
1793 that objcopy can handle it. */
1796 #if 0 /* Not handling other string tables specially right now. */
1797 hdr2
= elf_elfsections (abfd
)[i
]; /* in case it moved */
1798 /* We have a strtab for some random other section. */
1799 newsect
= (asection
*) hdr2
->bfd_section
;
1802 hdr
->bfd_section
= newsect
;
1803 hdr2
= &elf_section_data (newsect
)->str_hdr
;
1805 elf_elfsections (abfd
)[shindex
] = hdr2
;
1811 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1815 /* *These* do a lot of work -- but build no sections! */
1817 asection
*target_sect
;
1818 Elf_Internal_Shdr
*hdr2
;
1819 unsigned int num_sec
= elf_numsections (abfd
);
1821 /* Check for a bogus link to avoid crashing. */
1822 if ((hdr
->sh_link
>= SHN_LORESERVE
&& hdr
->sh_link
<= SHN_HIRESERVE
)
1823 || hdr
->sh_link
>= num_sec
)
1825 ((*_bfd_error_handler
)
1826 (_("%s: invalid link %lu for reloc section %s (index %u)"),
1827 bfd_archive_filename (abfd
), hdr
->sh_link
, name
, shindex
));
1828 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1831 /* For some incomprehensible reason Oracle distributes
1832 libraries for Solaris in which some of the objects have
1833 bogus sh_link fields. It would be nice if we could just
1834 reject them, but, unfortunately, some people need to use
1835 them. We scan through the section headers; if we find only
1836 one suitable symbol table, we clobber the sh_link to point
1837 to it. I hope this doesn't break anything. */
1838 if (elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_SYMTAB
1839 && elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_DYNSYM
)
1845 for (scan
= 1; scan
< num_sec
; scan
++)
1847 if (elf_elfsections (abfd
)[scan
]->sh_type
== SHT_SYMTAB
1848 || elf_elfsections (abfd
)[scan
]->sh_type
== SHT_DYNSYM
)
1859 hdr
->sh_link
= found
;
1862 /* Get the symbol table. */
1863 if (elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
== SHT_SYMTAB
1864 && ! bfd_section_from_shdr (abfd
, hdr
->sh_link
))
1867 /* If this reloc section does not use the main symbol table we
1868 don't treat it as a reloc section. BFD can't adequately
1869 represent such a section, so at least for now, we don't
1870 try. We just present it as a normal section. We also
1871 can't use it as a reloc section if it points to the null
1873 if (hdr
->sh_link
!= elf_onesymtab (abfd
) || hdr
->sh_info
== SHN_UNDEF
)
1874 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1876 if (! bfd_section_from_shdr (abfd
, hdr
->sh_info
))
1878 target_sect
= bfd_section_from_elf_index (abfd
, hdr
->sh_info
);
1879 if (target_sect
== NULL
)
1882 if ((target_sect
->flags
& SEC_RELOC
) == 0
1883 || target_sect
->reloc_count
== 0)
1884 hdr2
= &elf_section_data (target_sect
)->rel_hdr
;
1888 BFD_ASSERT (elf_section_data (target_sect
)->rel_hdr2
== NULL
);
1889 amt
= sizeof (*hdr2
);
1890 hdr2
= bfd_alloc (abfd
, amt
);
1891 elf_section_data (target_sect
)->rel_hdr2
= hdr2
;
1894 elf_elfsections (abfd
)[shindex
] = hdr2
;
1895 target_sect
->reloc_count
+= NUM_SHDR_ENTRIES (hdr
);
1896 target_sect
->flags
|= SEC_RELOC
;
1897 target_sect
->relocation
= NULL
;
1898 target_sect
->rel_filepos
= hdr
->sh_offset
;
1899 /* In the section to which the relocations apply, mark whether
1900 its relocations are of the REL or RELA variety. */
1901 if (hdr
->sh_size
!= 0)
1902 target_sect
->use_rela_p
= hdr
->sh_type
== SHT_RELA
;
1903 abfd
->flags
|= HAS_RELOC
;
1908 case SHT_GNU_verdef
:
1909 elf_dynverdef (abfd
) = shindex
;
1910 elf_tdata (abfd
)->dynverdef_hdr
= *hdr
;
1911 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1914 case SHT_GNU_versym
:
1915 elf_dynversym (abfd
) = shindex
;
1916 elf_tdata (abfd
)->dynversym_hdr
= *hdr
;
1917 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1920 case SHT_GNU_verneed
:
1921 elf_dynverref (abfd
) = shindex
;
1922 elf_tdata (abfd
)->dynverref_hdr
= *hdr
;
1923 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1930 /* We need a BFD section for objcopy and relocatable linking,
1931 and it's handy to have the signature available as the section
1933 name
= group_signature (abfd
, hdr
);
1936 if (!_bfd_elf_make_section_from_shdr (abfd
, hdr
, name
))
1938 if (hdr
->contents
!= NULL
)
1940 Elf_Internal_Group
*idx
= (Elf_Internal_Group
*) hdr
->contents
;
1941 unsigned int n_elt
= hdr
->sh_size
/ 4;
1944 if (idx
->flags
& GRP_COMDAT
)
1945 hdr
->bfd_section
->flags
1946 |= SEC_LINK_ONCE
| SEC_LINK_DUPLICATES_DISCARD
;
1948 while (--n_elt
!= 0)
1949 if ((s
= (++idx
)->shdr
->bfd_section
) != NULL
1950 && elf_next_in_group (s
) != NULL
)
1952 elf_next_in_group (hdr
->bfd_section
) = s
;
1959 /* Check for any processor-specific section types. */
1961 if (bed
->elf_backend_section_from_shdr
)
1962 (*bed
->elf_backend_section_from_shdr
) (abfd
, hdr
, name
);
1970 /* Return the section for the local symbol specified by ABFD, R_SYMNDX.
1971 Return SEC for sections that have no elf section, and NULL on error. */
1974 bfd_section_from_r_symndx (bfd
*abfd
,
1975 struct sym_sec_cache
*cache
,
1977 unsigned long r_symndx
)
1979 Elf_Internal_Shdr
*symtab_hdr
;
1980 unsigned char esym
[sizeof (Elf64_External_Sym
)];
1981 Elf_External_Sym_Shndx eshndx
;
1982 Elf_Internal_Sym isym
;
1983 unsigned int ent
= r_symndx
% LOCAL_SYM_CACHE_SIZE
;
1985 if (cache
->abfd
== abfd
&& cache
->indx
[ent
] == r_symndx
)
1986 return cache
->sec
[ent
];
1988 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
1989 if (bfd_elf_get_elf_syms (abfd
, symtab_hdr
, 1, r_symndx
,
1990 &isym
, esym
, &eshndx
) == NULL
)
1993 if (cache
->abfd
!= abfd
)
1995 memset (cache
->indx
, -1, sizeof (cache
->indx
));
1998 cache
->indx
[ent
] = r_symndx
;
1999 cache
->sec
[ent
] = sec
;
2000 if ((isym
.st_shndx
!= SHN_UNDEF
&& isym
.st_shndx
< SHN_LORESERVE
)
2001 || isym
.st_shndx
> SHN_HIRESERVE
)
2004 s
= bfd_section_from_elf_index (abfd
, isym
.st_shndx
);
2006 cache
->sec
[ent
] = s
;
2008 return cache
->sec
[ent
];
2011 /* Given an ELF section number, retrieve the corresponding BFD
2015 bfd_section_from_elf_index (bfd
*abfd
, unsigned int index
)
2017 if (index
>= elf_numsections (abfd
))
2019 return elf_elfsections (abfd
)[index
]->bfd_section
;
2022 static struct bfd_elf_special_section
const special_sections
[] =
2024 { ".bss", 4, -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
},
2025 { ".comment", 8, 0, SHT_PROGBITS
, 0 },
2026 { ".data", 5, -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
},
2027 { ".data1", 6, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
},
2028 { ".debug", 6, 0, SHT_PROGBITS
, 0 },
2029 { ".fini", 5, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
},
2030 { ".init", 5, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
},
2031 { ".line", 5, 0, SHT_PROGBITS
, 0 },
2032 { ".rodata", 7, -2, SHT_PROGBITS
, SHF_ALLOC
},
2033 { ".rodata1", 8, 0, SHT_PROGBITS
, SHF_ALLOC
},
2034 { ".tbss", 5, -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_TLS
},
2035 { ".tdata", 6, -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_TLS
},
2036 { ".text", 5, -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
},
2037 { ".init_array", 11, 0, SHT_INIT_ARRAY
, SHF_ALLOC
+ SHF_WRITE
},
2038 { ".fini_array", 11, 0, SHT_FINI_ARRAY
, SHF_ALLOC
+ SHF_WRITE
},
2039 { ".preinit_array", 14, 0, SHT_PREINIT_ARRAY
, SHF_ALLOC
+ SHF_WRITE
},
2040 { ".debug_line", 11, 0, SHT_PROGBITS
, 0 },
2041 { ".debug_info", 11, 0, SHT_PROGBITS
, 0 },
2042 { ".debug_abbrev", 13, 0, SHT_PROGBITS
, 0 },
2043 { ".debug_aranges", 14, 0, SHT_PROGBITS
, 0 },
2044 { ".dynamic", 8, 0, SHT_DYNAMIC
, SHF_ALLOC
},
2045 { ".dynstr", 7, 0, SHT_STRTAB
, SHF_ALLOC
},
2046 { ".dynsym", 7, 0, SHT_DYNSYM
, SHF_ALLOC
},
2047 { ".got", 4, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
},
2048 { ".hash", 5, 0, SHT_HASH
, SHF_ALLOC
},
2049 { ".interp", 7, 0, SHT_PROGBITS
, 0 },
2050 { ".plt", 4, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
},
2051 { ".shstrtab", 9, 0, SHT_STRTAB
, 0 },
2052 { ".strtab", 7, 0, SHT_STRTAB
, 0 },
2053 { ".symtab", 7, 0, SHT_SYMTAB
, 0 },
2054 { ".gnu.version", 12, 0, SHT_GNU_versym
, 0 },
2055 { ".gnu.version_d", 14, 0, SHT_GNU_verdef
, 0 },
2056 { ".gnu.version_r", 14, 0, SHT_GNU_verneed
, 0 },
2057 { ".note", 5, -1, SHT_NOTE
, 0 },
2058 { ".rela", 5, -1, SHT_RELA
, 0 },
2059 { ".rel", 4, -1, SHT_REL
, 0 },
2060 { ".stabstr", 5, 3, SHT_STRTAB
, 0 },
2061 { NULL
, 0, 0, 0, 0 }
2064 static const struct bfd_elf_special_section
*
2065 get_special_section (const char *name
,
2066 const struct bfd_elf_special_section
*special_sections
,
2070 int len
= strlen (name
);
2072 for (i
= 0; special_sections
[i
].prefix
!= NULL
; i
++)
2075 int prefix_len
= special_sections
[i
].prefix_length
;
2077 if (len
< prefix_len
)
2079 if (memcmp (name
, special_sections
[i
].prefix
, prefix_len
) != 0)
2082 suffix_len
= special_sections
[i
].suffix_length
;
2083 if (suffix_len
<= 0)
2085 if (name
[prefix_len
] != 0)
2087 if (suffix_len
== 0)
2089 if (name
[prefix_len
] != '.'
2090 && (suffix_len
== -2
2091 || (rela
&& special_sections
[i
].type
== SHT_REL
)))
2097 if (len
< prefix_len
+ suffix_len
)
2099 if (memcmp (name
+ len
- suffix_len
,
2100 special_sections
[i
].prefix
+ prefix_len
,
2104 return &special_sections
[i
];
2110 const struct bfd_elf_special_section
*
2111 _bfd_elf_get_sec_type_attr (bfd
*abfd
, const char *name
)
2113 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2114 const struct bfd_elf_special_section
*ssect
= NULL
;
2116 /* See if this is one of the special sections. */
2119 unsigned int rela
= bed
->default_use_rela_p
;
2121 if (bed
->special_sections
)
2122 ssect
= get_special_section (name
, bed
->special_sections
, rela
);
2125 ssect
= get_special_section (name
, special_sections
, rela
);
2132 _bfd_elf_new_section_hook (bfd
*abfd
, asection
*sec
)
2134 struct bfd_elf_section_data
*sdata
;
2135 const struct bfd_elf_special_section
*ssect
;
2137 sdata
= (struct bfd_elf_section_data
*) sec
->used_by_bfd
;
2140 sdata
= bfd_zalloc (abfd
, sizeof (*sdata
));
2143 sec
->used_by_bfd
= sdata
;
2146 elf_section_type (sec
) = SHT_NULL
;
2147 ssect
= _bfd_elf_get_sec_type_attr (abfd
, sec
->name
);
2150 elf_section_type (sec
) = ssect
->type
;
2151 elf_section_flags (sec
) = ssect
->attr
;
2154 /* Indicate whether or not this section should use RELA relocations. */
2155 sec
->use_rela_p
= get_elf_backend_data (abfd
)->default_use_rela_p
;
2160 /* Create a new bfd section from an ELF program header.
2162 Since program segments have no names, we generate a synthetic name
2163 of the form segment<NUM>, where NUM is generally the index in the
2164 program header table. For segments that are split (see below) we
2165 generate the names segment<NUM>a and segment<NUM>b.
2167 Note that some program segments may have a file size that is different than
2168 (less than) the memory size. All this means is that at execution the
2169 system must allocate the amount of memory specified by the memory size,
2170 but only initialize it with the first "file size" bytes read from the
2171 file. This would occur for example, with program segments consisting
2172 of combined data+bss.
2174 To handle the above situation, this routine generates TWO bfd sections
2175 for the single program segment. The first has the length specified by
2176 the file size of the segment, and the second has the length specified
2177 by the difference between the two sizes. In effect, the segment is split
2178 into it's initialized and uninitialized parts.
2183 _bfd_elf_make_section_from_phdr (bfd
*abfd
,
2184 Elf_Internal_Phdr
*hdr
,
2186 const char *typename
)
2194 split
= ((hdr
->p_memsz
> 0)
2195 && (hdr
->p_filesz
> 0)
2196 && (hdr
->p_memsz
> hdr
->p_filesz
));
2197 sprintf (namebuf
, "%s%d%s", typename
, index
, split
? "a" : "");
2198 len
= strlen (namebuf
) + 1;
2199 name
= bfd_alloc (abfd
, len
);
2202 memcpy (name
, namebuf
, len
);
2203 newsect
= bfd_make_section (abfd
, name
);
2204 if (newsect
== NULL
)
2206 newsect
->vma
= hdr
->p_vaddr
;
2207 newsect
->lma
= hdr
->p_paddr
;
2208 newsect
->_raw_size
= hdr
->p_filesz
;
2209 newsect
->filepos
= hdr
->p_offset
;
2210 newsect
->flags
|= SEC_HAS_CONTENTS
;
2211 newsect
->alignment_power
= bfd_log2 (hdr
->p_align
);
2212 if (hdr
->p_type
== PT_LOAD
)
2214 newsect
->flags
|= SEC_ALLOC
;
2215 newsect
->flags
|= SEC_LOAD
;
2216 if (hdr
->p_flags
& PF_X
)
2218 /* FIXME: all we known is that it has execute PERMISSION,
2220 newsect
->flags
|= SEC_CODE
;
2223 if (!(hdr
->p_flags
& PF_W
))
2225 newsect
->flags
|= SEC_READONLY
;
2230 sprintf (namebuf
, "%s%db", typename
, index
);
2231 len
= strlen (namebuf
) + 1;
2232 name
= bfd_alloc (abfd
, len
);
2235 memcpy (name
, namebuf
, len
);
2236 newsect
= bfd_make_section (abfd
, name
);
2237 if (newsect
== NULL
)
2239 newsect
->vma
= hdr
->p_vaddr
+ hdr
->p_filesz
;
2240 newsect
->lma
= hdr
->p_paddr
+ hdr
->p_filesz
;
2241 newsect
->_raw_size
= hdr
->p_memsz
- hdr
->p_filesz
;
2242 if (hdr
->p_type
== PT_LOAD
)
2244 newsect
->flags
|= SEC_ALLOC
;
2245 if (hdr
->p_flags
& PF_X
)
2246 newsect
->flags
|= SEC_CODE
;
2248 if (!(hdr
->p_flags
& PF_W
))
2249 newsect
->flags
|= SEC_READONLY
;
2256 bfd_section_from_phdr (bfd
*abfd
, Elf_Internal_Phdr
*hdr
, int index
)
2258 const struct elf_backend_data
*bed
;
2260 switch (hdr
->p_type
)
2263 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "null");
2266 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "load");
2269 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "dynamic");
2272 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "interp");
2275 if (! _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "note"))
2277 if (! elfcore_read_notes (abfd
, hdr
->p_offset
, hdr
->p_filesz
))
2282 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "shlib");
2285 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "phdr");
2287 case PT_GNU_EH_FRAME
:
2288 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
,
2292 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "stack");
2295 /* Check for any processor-specific program segment types.
2296 If no handler for them, default to making "segment" sections. */
2297 bed
= get_elf_backend_data (abfd
);
2298 if (bed
->elf_backend_section_from_phdr
)
2299 return (*bed
->elf_backend_section_from_phdr
) (abfd
, hdr
, index
);
2301 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "segment");
2305 /* Initialize REL_HDR, the section-header for new section, containing
2306 relocations against ASECT. If USE_RELA_P is TRUE, we use RELA
2307 relocations; otherwise, we use REL relocations. */
2310 _bfd_elf_init_reloc_shdr (bfd
*abfd
,
2311 Elf_Internal_Shdr
*rel_hdr
,
2313 bfd_boolean use_rela_p
)
2316 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2317 bfd_size_type amt
= sizeof ".rela" + strlen (asect
->name
);
2319 name
= bfd_alloc (abfd
, amt
);
2322 sprintf (name
, "%s%s", use_rela_p
? ".rela" : ".rel", asect
->name
);
2324 (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd
), name
,
2326 if (rel_hdr
->sh_name
== (unsigned int) -1)
2328 rel_hdr
->sh_type
= use_rela_p
? SHT_RELA
: SHT_REL
;
2329 rel_hdr
->sh_entsize
= (use_rela_p
2330 ? bed
->s
->sizeof_rela
2331 : bed
->s
->sizeof_rel
);
2332 rel_hdr
->sh_addralign
= 1 << bed
->s
->log_file_align
;
2333 rel_hdr
->sh_flags
= 0;
2334 rel_hdr
->sh_addr
= 0;
2335 rel_hdr
->sh_size
= 0;
2336 rel_hdr
->sh_offset
= 0;
2341 /* Set up an ELF internal section header for a section. */
2344 elf_fake_sections (bfd
*abfd
, asection
*asect
, void *failedptrarg
)
2346 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2347 bfd_boolean
*failedptr
= failedptrarg
;
2348 Elf_Internal_Shdr
*this_hdr
;
2352 /* We already failed; just get out of the bfd_map_over_sections
2357 this_hdr
= &elf_section_data (asect
)->this_hdr
;
2359 this_hdr
->sh_name
= (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd
),
2360 asect
->name
, FALSE
);
2361 if (this_hdr
->sh_name
== (unsigned int) -1)
2367 this_hdr
->sh_flags
= 0;
2369 if ((asect
->flags
& SEC_ALLOC
) != 0
2370 || asect
->user_set_vma
)
2371 this_hdr
->sh_addr
= asect
->vma
;
2373 this_hdr
->sh_addr
= 0;
2375 this_hdr
->sh_offset
= 0;
2376 this_hdr
->sh_size
= asect
->_raw_size
;
2377 this_hdr
->sh_link
= 0;
2378 this_hdr
->sh_addralign
= 1 << asect
->alignment_power
;
2379 /* The sh_entsize and sh_info fields may have been set already by
2380 copy_private_section_data. */
2382 this_hdr
->bfd_section
= asect
;
2383 this_hdr
->contents
= NULL
;
2385 /* If the section type is unspecified, we set it based on
2387 if (this_hdr
->sh_type
== SHT_NULL
)
2389 if ((asect
->flags
& SEC_ALLOC
) != 0
2390 && (((asect
->flags
& (SEC_LOAD
| SEC_HAS_CONTENTS
)) == 0)
2391 || (asect
->flags
& SEC_NEVER_LOAD
) != 0))
2392 this_hdr
->sh_type
= SHT_NOBITS
;
2394 this_hdr
->sh_type
= SHT_PROGBITS
;
2397 switch (this_hdr
->sh_type
)
2403 case SHT_INIT_ARRAY
:
2404 case SHT_FINI_ARRAY
:
2405 case SHT_PREINIT_ARRAY
:
2412 this_hdr
->sh_entsize
= bed
->s
->sizeof_hash_entry
;
2416 this_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
2420 this_hdr
->sh_entsize
= bed
->s
->sizeof_dyn
;
2424 if (get_elf_backend_data (abfd
)->may_use_rela_p
)
2425 this_hdr
->sh_entsize
= bed
->s
->sizeof_rela
;
2429 if (get_elf_backend_data (abfd
)->may_use_rel_p
)
2430 this_hdr
->sh_entsize
= bed
->s
->sizeof_rel
;
2433 case SHT_GNU_versym
:
2434 this_hdr
->sh_entsize
= sizeof (Elf_External_Versym
);
2437 case SHT_GNU_verdef
:
2438 this_hdr
->sh_entsize
= 0;
2439 /* objcopy or strip will copy over sh_info, but may not set
2440 cverdefs. The linker will set cverdefs, but sh_info will be
2442 if (this_hdr
->sh_info
== 0)
2443 this_hdr
->sh_info
= elf_tdata (abfd
)->cverdefs
;
2445 BFD_ASSERT (elf_tdata (abfd
)->cverdefs
== 0
2446 || this_hdr
->sh_info
== elf_tdata (abfd
)->cverdefs
);
2449 case SHT_GNU_verneed
:
2450 this_hdr
->sh_entsize
= 0;
2451 /* objcopy or strip will copy over sh_info, but may not set
2452 cverrefs. The linker will set cverrefs, but sh_info will be
2454 if (this_hdr
->sh_info
== 0)
2455 this_hdr
->sh_info
= elf_tdata (abfd
)->cverrefs
;
2457 BFD_ASSERT (elf_tdata (abfd
)->cverrefs
== 0
2458 || this_hdr
->sh_info
== elf_tdata (abfd
)->cverrefs
);
2462 this_hdr
->sh_entsize
= 4;
2466 if ((asect
->flags
& SEC_ALLOC
) != 0)
2467 this_hdr
->sh_flags
|= SHF_ALLOC
;
2468 if ((asect
->flags
& SEC_READONLY
) == 0)
2469 this_hdr
->sh_flags
|= SHF_WRITE
;
2470 if ((asect
->flags
& SEC_CODE
) != 0)
2471 this_hdr
->sh_flags
|= SHF_EXECINSTR
;
2472 if ((asect
->flags
& SEC_MERGE
) != 0)
2474 this_hdr
->sh_flags
|= SHF_MERGE
;
2475 this_hdr
->sh_entsize
= asect
->entsize
;
2476 if ((asect
->flags
& SEC_STRINGS
) != 0)
2477 this_hdr
->sh_flags
|= SHF_STRINGS
;
2479 if ((asect
->flags
& SEC_GROUP
) == 0 && elf_group_name (asect
) != NULL
)
2480 this_hdr
->sh_flags
|= SHF_GROUP
;
2481 if ((asect
->flags
& SEC_THREAD_LOCAL
) != 0)
2483 this_hdr
->sh_flags
|= SHF_TLS
;
2484 if (asect
->_raw_size
== 0 && (asect
->flags
& SEC_HAS_CONTENTS
) == 0)
2486 struct bfd_link_order
*o
;
2488 this_hdr
->sh_size
= 0;
2489 for (o
= asect
->link_order_head
; o
!= NULL
; o
= o
->next
)
2490 if (this_hdr
->sh_size
< o
->offset
+ o
->size
)
2491 this_hdr
->sh_size
= o
->offset
+ o
->size
;
2492 if (this_hdr
->sh_size
)
2493 this_hdr
->sh_type
= SHT_NOBITS
;
2497 /* Check for processor-specific section types. */
2498 if (bed
->elf_backend_fake_sections
2499 && !(*bed
->elf_backend_fake_sections
) (abfd
, this_hdr
, asect
))
2502 /* If the section has relocs, set up a section header for the
2503 SHT_REL[A] section. If two relocation sections are required for
2504 this section, it is up to the processor-specific back-end to
2505 create the other. */
2506 if ((asect
->flags
& SEC_RELOC
) != 0
2507 && !_bfd_elf_init_reloc_shdr (abfd
,
2508 &elf_section_data (asect
)->rel_hdr
,
2514 /* Fill in the contents of a SHT_GROUP section. */
2517 bfd_elf_set_group_contents (bfd
*abfd
, asection
*sec
, void *failedptrarg
)
2519 bfd_boolean
*failedptr
= failedptrarg
;
2520 unsigned long symindx
;
2521 asection
*elt
, *first
;
2523 struct bfd_link_order
*l
;
2526 if (elf_section_data (sec
)->this_hdr
.sh_type
!= SHT_GROUP
2531 if (elf_group_id (sec
) != NULL
)
2532 symindx
= elf_group_id (sec
)->udata
.i
;
2536 /* If called from the assembler, swap_out_syms will have set up
2537 elf_section_syms; If called for "ld -r", use target_index. */
2538 if (elf_section_syms (abfd
) != NULL
)
2539 symindx
= elf_section_syms (abfd
)[sec
->index
]->udata
.i
;
2541 symindx
= sec
->target_index
;
2543 elf_section_data (sec
)->this_hdr
.sh_info
= symindx
;
2545 /* The contents won't be allocated for "ld -r" or objcopy. */
2547 if (sec
->contents
== NULL
)
2550 sec
->contents
= bfd_alloc (abfd
, sec
->_raw_size
);
2552 /* Arrange for the section to be written out. */
2553 elf_section_data (sec
)->this_hdr
.contents
= sec
->contents
;
2554 if (sec
->contents
== NULL
)
2561 loc
= sec
->contents
+ sec
->_raw_size
;
2563 /* Get the pointer to the first section in the group that gas
2564 squirreled away here. objcopy arranges for this to be set to the
2565 start of the input section group. */
2566 first
= elt
= elf_next_in_group (sec
);
2568 /* First element is a flag word. Rest of section is elf section
2569 indices for all the sections of the group. Write them backwards
2570 just to keep the group in the same order as given in .section
2571 directives, not that it matters. */
2580 s
= s
->output_section
;
2583 idx
= elf_section_data (s
)->this_idx
;
2584 H_PUT_32 (abfd
, idx
, loc
);
2585 elt
= elf_next_in_group (elt
);
2590 /* If this is a relocatable link, then the above did nothing because
2591 SEC is the output section. Look through the input sections
2593 for (l
= sec
->link_order_head
; l
!= NULL
; l
= l
->next
)
2594 if (l
->type
== bfd_indirect_link_order
2595 && (elt
= elf_next_in_group (l
->u
.indirect
.section
)) != NULL
)
2600 elf_section_data (elt
->output_section
)->this_idx
, loc
);
2601 elt
= elf_next_in_group (elt
);
2602 /* During a relocatable link, the lists are circular. */
2604 while (elt
!= elf_next_in_group (l
->u
.indirect
.section
));
2606 /* With ld -r, merging SHT_GROUP sections results in wasted space
2607 due to allowing for the flag word on each input. We may well
2608 duplicate entries too. */
2609 while ((loc
-= 4) > sec
->contents
)
2610 H_PUT_32 (abfd
, 0, loc
);
2612 if (loc
!= sec
->contents
)
2615 H_PUT_32 (abfd
, sec
->flags
& SEC_LINK_ONCE
? GRP_COMDAT
: 0, loc
);
2618 /* Assign all ELF section numbers. The dummy first section is handled here
2619 too. The link/info pointers for the standard section types are filled
2620 in here too, while we're at it. */
2623 assign_section_numbers (bfd
*abfd
)
2625 struct elf_obj_tdata
*t
= elf_tdata (abfd
);
2627 unsigned int section_number
, secn
;
2628 Elf_Internal_Shdr
**i_shdrp
;
2633 _bfd_elf_strtab_clear_all_refs (elf_shstrtab (abfd
));
2635 for (sec
= abfd
->sections
; sec
; sec
= sec
->next
)
2637 struct bfd_elf_section_data
*d
= elf_section_data (sec
);
2639 if (section_number
== SHN_LORESERVE
)
2640 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2641 d
->this_idx
= section_number
++;
2642 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->this_hdr
.sh_name
);
2643 if ((sec
->flags
& SEC_RELOC
) == 0)
2647 if (section_number
== SHN_LORESERVE
)
2648 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2649 d
->rel_idx
= section_number
++;
2650 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->rel_hdr
.sh_name
);
2655 if (section_number
== SHN_LORESERVE
)
2656 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2657 d
->rel_idx2
= section_number
++;
2658 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->rel_hdr2
->sh_name
);
2664 if (section_number
== SHN_LORESERVE
)
2665 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2666 t
->shstrtab_section
= section_number
++;
2667 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->shstrtab_hdr
.sh_name
);
2668 elf_elfheader (abfd
)->e_shstrndx
= t
->shstrtab_section
;
2670 if (bfd_get_symcount (abfd
) > 0)
2672 if (section_number
== SHN_LORESERVE
)
2673 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2674 t
->symtab_section
= section_number
++;
2675 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->symtab_hdr
.sh_name
);
2676 if (section_number
> SHN_LORESERVE
- 2)
2678 if (section_number
== SHN_LORESERVE
)
2679 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2680 t
->symtab_shndx_section
= section_number
++;
2681 t
->symtab_shndx_hdr
.sh_name
2682 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd
),
2683 ".symtab_shndx", FALSE
);
2684 if (t
->symtab_shndx_hdr
.sh_name
== (unsigned int) -1)
2687 if (section_number
== SHN_LORESERVE
)
2688 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2689 t
->strtab_section
= section_number
++;
2690 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->strtab_hdr
.sh_name
);
2693 _bfd_elf_strtab_finalize (elf_shstrtab (abfd
));
2694 t
->shstrtab_hdr
.sh_size
= _bfd_elf_strtab_size (elf_shstrtab (abfd
));
2696 elf_numsections (abfd
) = section_number
;
2697 elf_elfheader (abfd
)->e_shnum
= section_number
;
2698 if (section_number
> SHN_LORESERVE
)
2699 elf_elfheader (abfd
)->e_shnum
-= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2701 /* Set up the list of section header pointers, in agreement with the
2703 amt
= section_number
* sizeof (Elf_Internal_Shdr
*);
2704 i_shdrp
= bfd_zalloc (abfd
, amt
);
2705 if (i_shdrp
== NULL
)
2708 amt
= sizeof (Elf_Internal_Shdr
);
2709 i_shdrp
[0] = bfd_zalloc (abfd
, amt
);
2710 if (i_shdrp
[0] == NULL
)
2712 bfd_release (abfd
, i_shdrp
);
2716 elf_elfsections (abfd
) = i_shdrp
;
2718 i_shdrp
[t
->shstrtab_section
] = &t
->shstrtab_hdr
;
2719 if (bfd_get_symcount (abfd
) > 0)
2721 i_shdrp
[t
->symtab_section
] = &t
->symtab_hdr
;
2722 if (elf_numsections (abfd
) > SHN_LORESERVE
)
2724 i_shdrp
[t
->symtab_shndx_section
] = &t
->symtab_shndx_hdr
;
2725 t
->symtab_shndx_hdr
.sh_link
= t
->symtab_section
;
2727 i_shdrp
[t
->strtab_section
] = &t
->strtab_hdr
;
2728 t
->symtab_hdr
.sh_link
= t
->strtab_section
;
2730 for (sec
= abfd
->sections
; sec
; sec
= sec
->next
)
2732 struct bfd_elf_section_data
*d
= elf_section_data (sec
);
2736 i_shdrp
[d
->this_idx
] = &d
->this_hdr
;
2737 if (d
->rel_idx
!= 0)
2738 i_shdrp
[d
->rel_idx
] = &d
->rel_hdr
;
2739 if (d
->rel_idx2
!= 0)
2740 i_shdrp
[d
->rel_idx2
] = d
->rel_hdr2
;
2742 /* Fill in the sh_link and sh_info fields while we're at it. */
2744 /* sh_link of a reloc section is the section index of the symbol
2745 table. sh_info is the section index of the section to which
2746 the relocation entries apply. */
2747 if (d
->rel_idx
!= 0)
2749 d
->rel_hdr
.sh_link
= t
->symtab_section
;
2750 d
->rel_hdr
.sh_info
= d
->this_idx
;
2752 if (d
->rel_idx2
!= 0)
2754 d
->rel_hdr2
->sh_link
= t
->symtab_section
;
2755 d
->rel_hdr2
->sh_info
= d
->this_idx
;
2758 switch (d
->this_hdr
.sh_type
)
2762 /* A reloc section which we are treating as a normal BFD
2763 section. sh_link is the section index of the symbol
2764 table. sh_info is the section index of the section to
2765 which the relocation entries apply. We assume that an
2766 allocated reloc section uses the dynamic symbol table.
2767 FIXME: How can we be sure? */
2768 s
= bfd_get_section_by_name (abfd
, ".dynsym");
2770 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
2772 /* We look up the section the relocs apply to by name. */
2774 if (d
->this_hdr
.sh_type
== SHT_REL
)
2778 s
= bfd_get_section_by_name (abfd
, name
);
2780 d
->this_hdr
.sh_info
= elf_section_data (s
)->this_idx
;
2784 /* We assume that a section named .stab*str is a stabs
2785 string section. We look for a section with the same name
2786 but without the trailing ``str'', and set its sh_link
2787 field to point to this section. */
2788 if (strncmp (sec
->name
, ".stab", sizeof ".stab" - 1) == 0
2789 && strcmp (sec
->name
+ strlen (sec
->name
) - 3, "str") == 0)
2794 len
= strlen (sec
->name
);
2795 alc
= bfd_malloc (len
- 2);
2798 memcpy (alc
, sec
->name
, len
- 3);
2799 alc
[len
- 3] = '\0';
2800 s
= bfd_get_section_by_name (abfd
, alc
);
2804 elf_section_data (s
)->this_hdr
.sh_link
= d
->this_idx
;
2806 /* This is a .stab section. */
2807 if (elf_section_data (s
)->this_hdr
.sh_entsize
== 0)
2808 elf_section_data (s
)->this_hdr
.sh_entsize
2809 = 4 + 2 * bfd_get_arch_size (abfd
) / 8;
2816 case SHT_GNU_verneed
:
2817 case SHT_GNU_verdef
:
2818 /* sh_link is the section header index of the string table
2819 used for the dynamic entries, or the symbol table, or the
2821 s
= bfd_get_section_by_name (abfd
, ".dynstr");
2823 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
2827 case SHT_GNU_versym
:
2828 /* sh_link is the section header index of the symbol table
2829 this hash table or version table is for. */
2830 s
= bfd_get_section_by_name (abfd
, ".dynsym");
2832 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
2836 d
->this_hdr
.sh_link
= t
->symtab_section
;
2840 for (secn
= 1; secn
< section_number
; ++secn
)
2841 if (i_shdrp
[secn
] == NULL
)
2842 i_shdrp
[secn
] = i_shdrp
[0];
2844 i_shdrp
[secn
]->sh_name
= _bfd_elf_strtab_offset (elf_shstrtab (abfd
),
2845 i_shdrp
[secn
]->sh_name
);
2849 /* Map symbol from it's internal number to the external number, moving
2850 all local symbols to be at the head of the list. */
2853 sym_is_global (bfd
*abfd
, asymbol
*sym
)
2855 /* If the backend has a special mapping, use it. */
2856 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2857 if (bed
->elf_backend_sym_is_global
)
2858 return (*bed
->elf_backend_sym_is_global
) (abfd
, sym
);
2860 return ((sym
->flags
& (BSF_GLOBAL
| BSF_WEAK
)) != 0
2861 || bfd_is_und_section (bfd_get_section (sym
))
2862 || bfd_is_com_section (bfd_get_section (sym
)));
2866 elf_map_symbols (bfd
*abfd
)
2868 unsigned int symcount
= bfd_get_symcount (abfd
);
2869 asymbol
**syms
= bfd_get_outsymbols (abfd
);
2870 asymbol
**sect_syms
;
2871 unsigned int num_locals
= 0;
2872 unsigned int num_globals
= 0;
2873 unsigned int num_locals2
= 0;
2874 unsigned int num_globals2
= 0;
2882 fprintf (stderr
, "elf_map_symbols\n");
2886 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
2888 if (max_index
< asect
->index
)
2889 max_index
= asect
->index
;
2893 amt
= max_index
* sizeof (asymbol
*);
2894 sect_syms
= bfd_zalloc (abfd
, amt
);
2895 if (sect_syms
== NULL
)
2897 elf_section_syms (abfd
) = sect_syms
;
2898 elf_num_section_syms (abfd
) = max_index
;
2900 /* Init sect_syms entries for any section symbols we have already
2901 decided to output. */
2902 for (idx
= 0; idx
< symcount
; idx
++)
2904 asymbol
*sym
= syms
[idx
];
2906 if ((sym
->flags
& BSF_SECTION_SYM
) != 0
2913 if (sec
->owner
!= NULL
)
2915 if (sec
->owner
!= abfd
)
2917 if (sec
->output_offset
!= 0)
2920 sec
= sec
->output_section
;
2922 /* Empty sections in the input files may have had a
2923 section symbol created for them. (See the comment
2924 near the end of _bfd_generic_link_output_symbols in
2925 linker.c). If the linker script discards such
2926 sections then we will reach this point. Since we know
2927 that we cannot avoid this case, we detect it and skip
2928 the abort and the assignment to the sect_syms array.
2929 To reproduce this particular case try running the
2930 linker testsuite test ld-scripts/weak.exp for an ELF
2931 port that uses the generic linker. */
2932 if (sec
->owner
== NULL
)
2935 BFD_ASSERT (sec
->owner
== abfd
);
2937 sect_syms
[sec
->index
] = syms
[idx
];
2942 /* Classify all of the symbols. */
2943 for (idx
= 0; idx
< symcount
; idx
++)
2945 if (!sym_is_global (abfd
, syms
[idx
]))
2951 /* We will be adding a section symbol for each BFD section. Most normal
2952 sections will already have a section symbol in outsymbols, but
2953 eg. SHT_GROUP sections will not, and we need the section symbol mapped
2954 at least in that case. */
2955 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
2957 if (sect_syms
[asect
->index
] == NULL
)
2959 if (!sym_is_global (abfd
, asect
->symbol
))
2966 /* Now sort the symbols so the local symbols are first. */
2967 amt
= (num_locals
+ num_globals
) * sizeof (asymbol
*);
2968 new_syms
= bfd_alloc (abfd
, amt
);
2970 if (new_syms
== NULL
)
2973 for (idx
= 0; idx
< symcount
; idx
++)
2975 asymbol
*sym
= syms
[idx
];
2978 if (!sym_is_global (abfd
, sym
))
2981 i
= num_locals
+ num_globals2
++;
2983 sym
->udata
.i
= i
+ 1;
2985 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
2987 if (sect_syms
[asect
->index
] == NULL
)
2989 asymbol
*sym
= asect
->symbol
;
2992 sect_syms
[asect
->index
] = sym
;
2993 if (!sym_is_global (abfd
, sym
))
2996 i
= num_locals
+ num_globals2
++;
2998 sym
->udata
.i
= i
+ 1;
3002 bfd_set_symtab (abfd
, new_syms
, num_locals
+ num_globals
);
3004 elf_num_locals (abfd
) = num_locals
;
3005 elf_num_globals (abfd
) = num_globals
;
3009 /* Align to the maximum file alignment that could be required for any
3010 ELF data structure. */
3012 static inline file_ptr
3013 align_file_position (file_ptr off
, int align
)
3015 return (off
+ align
- 1) & ~(align
- 1);
3018 /* Assign a file position to a section, optionally aligning to the
3019 required section alignment. */
3022 _bfd_elf_assign_file_position_for_section (Elf_Internal_Shdr
*i_shdrp
,
3030 al
= i_shdrp
->sh_addralign
;
3032 offset
= BFD_ALIGN (offset
, al
);
3034 i_shdrp
->sh_offset
= offset
;
3035 if (i_shdrp
->bfd_section
!= NULL
)
3036 i_shdrp
->bfd_section
->filepos
= offset
;
3037 if (i_shdrp
->sh_type
!= SHT_NOBITS
)
3038 offset
+= i_shdrp
->sh_size
;
3042 /* Compute the file positions we are going to put the sections at, and
3043 otherwise prepare to begin writing out the ELF file. If LINK_INFO
3044 is not NULL, this is being called by the ELF backend linker. */
3047 _bfd_elf_compute_section_file_positions (bfd
*abfd
,
3048 struct bfd_link_info
*link_info
)
3050 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3052 struct bfd_strtab_hash
*strtab
;
3053 Elf_Internal_Shdr
*shstrtab_hdr
;
3055 if (abfd
->output_has_begun
)
3058 /* Do any elf backend specific processing first. */
3059 if (bed
->elf_backend_begin_write_processing
)
3060 (*bed
->elf_backend_begin_write_processing
) (abfd
, link_info
);
3062 if (! prep_headers (abfd
))
3065 /* Post process the headers if necessary. */
3066 if (bed
->elf_backend_post_process_headers
)
3067 (*bed
->elf_backend_post_process_headers
) (abfd
, link_info
);
3070 bfd_map_over_sections (abfd
, elf_fake_sections
, &failed
);
3074 if (!assign_section_numbers (abfd
))
3077 /* The backend linker builds symbol table information itself. */
3078 if (link_info
== NULL
&& bfd_get_symcount (abfd
) > 0)
3080 /* Non-zero if doing a relocatable link. */
3081 int relocatable_p
= ! (abfd
->flags
& (EXEC_P
| DYNAMIC
));
3083 if (! swap_out_syms (abfd
, &strtab
, relocatable_p
))
3087 if (link_info
== NULL
)
3089 bfd_map_over_sections (abfd
, bfd_elf_set_group_contents
, &failed
);
3094 shstrtab_hdr
= &elf_tdata (abfd
)->shstrtab_hdr
;
3095 /* sh_name was set in prep_headers. */
3096 shstrtab_hdr
->sh_type
= SHT_STRTAB
;
3097 shstrtab_hdr
->sh_flags
= 0;
3098 shstrtab_hdr
->sh_addr
= 0;
3099 shstrtab_hdr
->sh_size
= _bfd_elf_strtab_size (elf_shstrtab (abfd
));
3100 shstrtab_hdr
->sh_entsize
= 0;
3101 shstrtab_hdr
->sh_link
= 0;
3102 shstrtab_hdr
->sh_info
= 0;
3103 /* sh_offset is set in assign_file_positions_except_relocs. */
3104 shstrtab_hdr
->sh_addralign
= 1;
3106 if (!assign_file_positions_except_relocs (abfd
, link_info
))
3109 if (link_info
== NULL
&& bfd_get_symcount (abfd
) > 0)
3112 Elf_Internal_Shdr
*hdr
;
3114 off
= elf_tdata (abfd
)->next_file_pos
;
3116 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
3117 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
3119 hdr
= &elf_tdata (abfd
)->symtab_shndx_hdr
;
3120 if (hdr
->sh_size
!= 0)
3121 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
3123 hdr
= &elf_tdata (abfd
)->strtab_hdr
;
3124 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
3126 elf_tdata (abfd
)->next_file_pos
= off
;
3128 /* Now that we know where the .strtab section goes, write it
3130 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
3131 || ! _bfd_stringtab_emit (abfd
, strtab
))
3133 _bfd_stringtab_free (strtab
);
3136 abfd
->output_has_begun
= TRUE
;
3141 /* Create a mapping from a set of sections to a program segment. */
3143 static struct elf_segment_map
*
3144 make_mapping (bfd
*abfd
,
3145 asection
**sections
,
3150 struct elf_segment_map
*m
;
3155 amt
= sizeof (struct elf_segment_map
);
3156 amt
+= (to
- from
- 1) * sizeof (asection
*);
3157 m
= bfd_zalloc (abfd
, amt
);
3161 m
->p_type
= PT_LOAD
;
3162 for (i
= from
, hdrpp
= sections
+ from
; i
< to
; i
++, hdrpp
++)
3163 m
->sections
[i
- from
] = *hdrpp
;
3164 m
->count
= to
- from
;
3166 if (from
== 0 && phdr
)
3168 /* Include the headers in the first PT_LOAD segment. */
3169 m
->includes_filehdr
= 1;
3170 m
->includes_phdrs
= 1;
3176 /* Set up a mapping from BFD sections to program segments. */
3179 map_sections_to_segments (bfd
*abfd
)
3181 asection
**sections
= NULL
;
3185 struct elf_segment_map
*mfirst
;
3186 struct elf_segment_map
**pm
;
3187 struct elf_segment_map
*m
;
3189 unsigned int phdr_index
;
3190 bfd_vma maxpagesize
;
3192 bfd_boolean phdr_in_segment
= TRUE
;
3193 bfd_boolean writable
;
3195 asection
*first_tls
= NULL
;
3196 asection
*dynsec
, *eh_frame_hdr
;
3199 if (elf_tdata (abfd
)->segment_map
!= NULL
)
3202 if (bfd_count_sections (abfd
) == 0)
3205 /* Select the allocated sections, and sort them. */
3207 amt
= bfd_count_sections (abfd
) * sizeof (asection
*);
3208 sections
= bfd_malloc (amt
);
3209 if (sections
== NULL
)
3213 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
3215 if ((s
->flags
& SEC_ALLOC
) != 0)
3221 BFD_ASSERT (i
<= bfd_count_sections (abfd
));
3224 qsort (sections
, (size_t) count
, sizeof (asection
*), elf_sort_sections
);
3226 /* Build the mapping. */
3231 /* If we have a .interp section, then create a PT_PHDR segment for
3232 the program headers and a PT_INTERP segment for the .interp
3234 s
= bfd_get_section_by_name (abfd
, ".interp");
3235 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0)
3237 amt
= sizeof (struct elf_segment_map
);
3238 m
= bfd_zalloc (abfd
, amt
);
3242 m
->p_type
= PT_PHDR
;
3243 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
3244 m
->p_flags
= PF_R
| PF_X
;
3245 m
->p_flags_valid
= 1;
3246 m
->includes_phdrs
= 1;
3251 amt
= sizeof (struct elf_segment_map
);
3252 m
= bfd_zalloc (abfd
, amt
);
3256 m
->p_type
= PT_INTERP
;
3264 /* Look through the sections. We put sections in the same program
3265 segment when the start of the second section can be placed within
3266 a few bytes of the end of the first section. */
3269 maxpagesize
= get_elf_backend_data (abfd
)->maxpagesize
;
3271 dynsec
= bfd_get_section_by_name (abfd
, ".dynamic");
3273 && (dynsec
->flags
& SEC_LOAD
) == 0)
3276 /* Deal with -Ttext or something similar such that the first section
3277 is not adjacent to the program headers. This is an
3278 approximation, since at this point we don't know exactly how many
3279 program headers we will need. */
3282 bfd_size_type phdr_size
;
3284 phdr_size
= elf_tdata (abfd
)->program_header_size
;
3286 phdr_size
= get_elf_backend_data (abfd
)->s
->sizeof_phdr
;
3287 if ((abfd
->flags
& D_PAGED
) == 0
3288 || sections
[0]->lma
< phdr_size
3289 || sections
[0]->lma
% maxpagesize
< phdr_size
% maxpagesize
)
3290 phdr_in_segment
= FALSE
;
3293 for (i
= 0, hdrpp
= sections
; i
< count
; i
++, hdrpp
++)
3296 bfd_boolean new_segment
;
3300 /* See if this section and the last one will fit in the same
3303 if (last_hdr
== NULL
)
3305 /* If we don't have a segment yet, then we don't need a new
3306 one (we build the last one after this loop). */
3307 new_segment
= FALSE
;
3309 else if (last_hdr
->lma
- last_hdr
->vma
!= hdr
->lma
- hdr
->vma
)
3311 /* If this section has a different relation between the
3312 virtual address and the load address, then we need a new
3316 else if (BFD_ALIGN (last_hdr
->lma
+ last_hdr
->_raw_size
, maxpagesize
)
3317 < BFD_ALIGN (hdr
->lma
, maxpagesize
))
3319 /* If putting this section in this segment would force us to
3320 skip a page in the segment, then we need a new segment. */
3323 else if ((last_hdr
->flags
& SEC_LOAD
) == 0
3324 && (hdr
->flags
& SEC_LOAD
) != 0)
3326 /* We don't want to put a loadable section after a
3327 nonloadable section in the same segment. */
3330 else if ((abfd
->flags
& D_PAGED
) == 0)
3332 /* If the file is not demand paged, which means that we
3333 don't require the sections to be correctly aligned in the
3334 file, then there is no other reason for a new segment. */
3335 new_segment
= FALSE
;
3338 && (hdr
->flags
& SEC_READONLY
) == 0
3339 && (((last_hdr
->lma
+ last_hdr
->_raw_size
- 1)
3340 & ~(maxpagesize
- 1))
3341 != (hdr
->lma
& ~(maxpagesize
- 1))))
3343 /* We don't want to put a writable section in a read only
3344 segment, unless they are on the same page in memory
3345 anyhow. We already know that the last section does not
3346 bring us past the current section on the page, so the
3347 only case in which the new section is not on the same
3348 page as the previous section is when the previous section
3349 ends precisely on a page boundary. */
3354 /* Otherwise, we can use the same segment. */
3355 new_segment
= FALSE
;
3360 if ((hdr
->flags
& SEC_READONLY
) == 0)
3362 /* Ignore .tbss section for segment layout purposes. */
3363 if ((hdr
->flags
& (SEC_THREAD_LOCAL
| SEC_LOAD
)) != SEC_THREAD_LOCAL
)
3368 /* We need a new program segment. We must create a new program
3369 header holding all the sections from phdr_index until hdr. */
3371 m
= make_mapping (abfd
, sections
, phdr_index
, i
, phdr_in_segment
);
3378 if ((hdr
->flags
& SEC_READONLY
) == 0)
3385 phdr_in_segment
= FALSE
;
3388 /* Create a final PT_LOAD program segment. */
3389 if (last_hdr
!= NULL
)
3391 m
= make_mapping (abfd
, sections
, phdr_index
, i
, phdr_in_segment
);
3399 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
3402 amt
= sizeof (struct elf_segment_map
);
3403 m
= bfd_zalloc (abfd
, amt
);
3407 m
->p_type
= PT_DYNAMIC
;
3409 m
->sections
[0] = dynsec
;
3415 /* For each loadable .note section, add a PT_NOTE segment. We don't
3416 use bfd_get_section_by_name, because if we link together
3417 nonloadable .note sections and loadable .note sections, we will
3418 generate two .note sections in the output file. FIXME: Using
3419 names for section types is bogus anyhow. */
3420 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
3422 if ((s
->flags
& SEC_LOAD
) != 0
3423 && strncmp (s
->name
, ".note", 5) == 0)
3425 amt
= sizeof (struct elf_segment_map
);
3426 m
= bfd_zalloc (abfd
, amt
);
3430 m
->p_type
= PT_NOTE
;
3437 if (s
->flags
& SEC_THREAD_LOCAL
)
3445 /* If there are any SHF_TLS output sections, add PT_TLS segment. */
3450 amt
= sizeof (struct elf_segment_map
);
3451 amt
+= (tls_count
- 1) * sizeof (asection
*);
3452 m
= bfd_zalloc (abfd
, amt
);
3457 m
->count
= tls_count
;
3458 /* Mandated PF_R. */
3460 m
->p_flags_valid
= 1;
3461 for (i
= 0; i
< tls_count
; ++i
)
3463 BFD_ASSERT (first_tls
->flags
& SEC_THREAD_LOCAL
);
3464 m
->sections
[i
] = first_tls
;
3465 first_tls
= first_tls
->next
;
3472 /* If there is a .eh_frame_hdr section, throw in a PT_GNU_EH_FRAME
3474 eh_frame_hdr
= elf_tdata (abfd
)->eh_frame_hdr
;
3475 if (eh_frame_hdr
!= NULL
3476 && (eh_frame_hdr
->output_section
->flags
& SEC_LOAD
) != 0)
3478 amt
= sizeof (struct elf_segment_map
);
3479 m
= bfd_zalloc (abfd
, amt
);
3483 m
->p_type
= PT_GNU_EH_FRAME
;
3485 m
->sections
[0] = eh_frame_hdr
->output_section
;
3491 if (elf_tdata (abfd
)->stack_flags
)
3493 amt
= sizeof (struct elf_segment_map
);
3494 m
= bfd_zalloc (abfd
, amt
);
3498 m
->p_type
= PT_GNU_STACK
;
3499 m
->p_flags
= elf_tdata (abfd
)->stack_flags
;
3500 m
->p_flags_valid
= 1;
3509 elf_tdata (abfd
)->segment_map
= mfirst
;
3513 if (sections
!= NULL
)
3518 /* Sort sections by address. */
3521 elf_sort_sections (const void *arg1
, const void *arg2
)
3523 const asection
*sec1
= *(const asection
**) arg1
;
3524 const asection
*sec2
= *(const asection
**) arg2
;
3525 bfd_size_type size1
, size2
;
3527 /* Sort by LMA first, since this is the address used to
3528 place the section into a segment. */
3529 if (sec1
->lma
< sec2
->lma
)
3531 else if (sec1
->lma
> sec2
->lma
)
3534 /* Then sort by VMA. Normally the LMA and the VMA will be
3535 the same, and this will do nothing. */
3536 if (sec1
->vma
< sec2
->vma
)
3538 else if (sec1
->vma
> sec2
->vma
)
3541 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
3543 #define TOEND(x) (((x)->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0)
3549 /* If the indicies are the same, do not return 0
3550 here, but continue to try the next comparison. */
3551 if (sec1
->target_index
- sec2
->target_index
!= 0)
3552 return sec1
->target_index
- sec2
->target_index
;
3557 else if (TOEND (sec2
))
3562 /* Sort by size, to put zero sized sections
3563 before others at the same address. */
3565 size1
= (sec1
->flags
& SEC_LOAD
) ? sec1
->_raw_size
: 0;
3566 size2
= (sec2
->flags
& SEC_LOAD
) ? sec2
->_raw_size
: 0;
3573 return sec1
->target_index
- sec2
->target_index
;
3576 /* Ian Lance Taylor writes:
3578 We shouldn't be using % with a negative signed number. That's just
3579 not good. We have to make sure either that the number is not
3580 negative, or that the number has an unsigned type. When the types
3581 are all the same size they wind up as unsigned. When file_ptr is a
3582 larger signed type, the arithmetic winds up as signed long long,
3585 What we're trying to say here is something like ``increase OFF by
3586 the least amount that will cause it to be equal to the VMA modulo
3588 /* In other words, something like:
3590 vma_offset = m->sections[0]->vma % bed->maxpagesize;
3591 off_offset = off % bed->maxpagesize;
3592 if (vma_offset < off_offset)
3593 adjustment = vma_offset + bed->maxpagesize - off_offset;
3595 adjustment = vma_offset - off_offset;
3597 which can can be collapsed into the expression below. */
3600 vma_page_aligned_bias (bfd_vma vma
, ufile_ptr off
, bfd_vma maxpagesize
)
3602 return ((vma
- off
) % maxpagesize
);
3605 /* Assign file positions to the sections based on the mapping from
3606 sections to segments. This function also sets up some fields in
3607 the file header, and writes out the program headers. */
3610 assign_file_positions_for_segments (bfd
*abfd
, struct bfd_link_info
*link_info
)
3612 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3614 struct elf_segment_map
*m
;
3616 Elf_Internal_Phdr
*phdrs
;
3618 bfd_vma filehdr_vaddr
, filehdr_paddr
;
3619 bfd_vma phdrs_vaddr
, phdrs_paddr
;
3620 Elf_Internal_Phdr
*p
;
3623 if (elf_tdata (abfd
)->segment_map
== NULL
)
3625 if (! map_sections_to_segments (abfd
))
3630 /* The placement algorithm assumes that non allocated sections are
3631 not in PT_LOAD segments. We ensure this here by removing such
3632 sections from the segment map. */
3633 for (m
= elf_tdata (abfd
)->segment_map
;
3637 unsigned int new_count
;
3640 if (m
->p_type
!= PT_LOAD
)
3644 for (i
= 0; i
< m
->count
; i
++)
3646 if ((m
->sections
[i
]->flags
& SEC_ALLOC
) != 0)
3649 m
->sections
[new_count
] = m
->sections
[i
];
3655 if (new_count
!= m
->count
)
3656 m
->count
= new_count
;
3660 if (bed
->elf_backend_modify_segment_map
)
3662 if (! (*bed
->elf_backend_modify_segment_map
) (abfd
, link_info
))
3667 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
3670 elf_elfheader (abfd
)->e_phoff
= bed
->s
->sizeof_ehdr
;
3671 elf_elfheader (abfd
)->e_phentsize
= bed
->s
->sizeof_phdr
;
3672 elf_elfheader (abfd
)->e_phnum
= count
;
3677 /* If we already counted the number of program segments, make sure
3678 that we allocated enough space. This happens when SIZEOF_HEADERS
3679 is used in a linker script. */
3680 alloc
= elf_tdata (abfd
)->program_header_size
/ bed
->s
->sizeof_phdr
;
3681 if (alloc
!= 0 && count
> alloc
)
3683 ((*_bfd_error_handler
)
3684 (_("%s: Not enough room for program headers (allocated %u, need %u)"),
3685 bfd_get_filename (abfd
), alloc
, count
));
3686 bfd_set_error (bfd_error_bad_value
);
3693 amt
= alloc
* sizeof (Elf_Internal_Phdr
);
3694 phdrs
= bfd_alloc (abfd
, amt
);
3698 off
= bed
->s
->sizeof_ehdr
;
3699 off
+= alloc
* bed
->s
->sizeof_phdr
;
3706 for (m
= elf_tdata (abfd
)->segment_map
, p
= phdrs
;
3713 /* If elf_segment_map is not from map_sections_to_segments, the
3714 sections may not be correctly ordered. NOTE: sorting should
3715 not be done to the PT_NOTE section of a corefile, which may
3716 contain several pseudo-sections artificially created by bfd.
3717 Sorting these pseudo-sections breaks things badly. */
3719 && !(elf_elfheader (abfd
)->e_type
== ET_CORE
3720 && m
->p_type
== PT_NOTE
))
3721 qsort (m
->sections
, (size_t) m
->count
, sizeof (asection
*),
3724 p
->p_type
= m
->p_type
;
3725 p
->p_flags
= m
->p_flags
;
3727 if (p
->p_type
== PT_LOAD
3729 && (m
->sections
[0]->flags
& SEC_ALLOC
) != 0)
3731 if ((abfd
->flags
& D_PAGED
) != 0)
3732 off
+= vma_page_aligned_bias (m
->sections
[0]->vma
, off
,
3736 bfd_size_type align
;
3739 for (i
= 0, secpp
= m
->sections
; i
< m
->count
; i
++, secpp
++)
3741 bfd_size_type secalign
;
3743 secalign
= bfd_get_section_alignment (abfd
, *secpp
);
3744 if (secalign
> align
)
3748 off
+= vma_page_aligned_bias (m
->sections
[0]->vma
, off
,
3756 p
->p_vaddr
= m
->sections
[0]->vma
;
3758 if (m
->p_paddr_valid
)
3759 p
->p_paddr
= m
->p_paddr
;
3760 else if (m
->count
== 0)
3763 p
->p_paddr
= m
->sections
[0]->lma
;
3765 if (p
->p_type
== PT_LOAD
3766 && (abfd
->flags
& D_PAGED
) != 0)
3767 p
->p_align
= bed
->maxpagesize
;
3768 else if (m
->count
== 0)
3769 p
->p_align
= 1 << bed
->s
->log_file_align
;
3777 if (m
->includes_filehdr
)
3779 if (! m
->p_flags_valid
)
3782 p
->p_filesz
= bed
->s
->sizeof_ehdr
;
3783 p
->p_memsz
= bed
->s
->sizeof_ehdr
;
3786 BFD_ASSERT (p
->p_type
== PT_LOAD
);
3788 if (p
->p_vaddr
< (bfd_vma
) off
)
3790 (*_bfd_error_handler
)
3791 (_("%s: Not enough room for program headers, try linking with -N"),
3792 bfd_get_filename (abfd
));
3793 bfd_set_error (bfd_error_bad_value
);
3798 if (! m
->p_paddr_valid
)
3801 if (p
->p_type
== PT_LOAD
)
3803 filehdr_vaddr
= p
->p_vaddr
;
3804 filehdr_paddr
= p
->p_paddr
;
3808 if (m
->includes_phdrs
)
3810 if (! m
->p_flags_valid
)
3813 if (m
->includes_filehdr
)
3815 if (p
->p_type
== PT_LOAD
)
3817 phdrs_vaddr
= p
->p_vaddr
+ bed
->s
->sizeof_ehdr
;
3818 phdrs_paddr
= p
->p_paddr
+ bed
->s
->sizeof_ehdr
;
3823 p
->p_offset
= bed
->s
->sizeof_ehdr
;
3827 BFD_ASSERT (p
->p_type
== PT_LOAD
);
3828 p
->p_vaddr
-= off
- p
->p_offset
;
3829 if (! m
->p_paddr_valid
)
3830 p
->p_paddr
-= off
- p
->p_offset
;
3833 if (p
->p_type
== PT_LOAD
)
3835 phdrs_vaddr
= p
->p_vaddr
;
3836 phdrs_paddr
= p
->p_paddr
;
3839 phdrs_vaddr
= bed
->maxpagesize
+ bed
->s
->sizeof_ehdr
;
3842 p
->p_filesz
+= alloc
* bed
->s
->sizeof_phdr
;
3843 p
->p_memsz
+= alloc
* bed
->s
->sizeof_phdr
;
3846 if (p
->p_type
== PT_LOAD
3847 || (p
->p_type
== PT_NOTE
&& bfd_get_format (abfd
) == bfd_core
))
3849 if (! m
->includes_filehdr
&& ! m
->includes_phdrs
)
3855 adjust
= off
- (p
->p_offset
+ p
->p_filesz
);
3856 p
->p_filesz
+= adjust
;
3857 p
->p_memsz
+= adjust
;
3863 for (i
= 0, secpp
= m
->sections
; i
< m
->count
; i
++, secpp
++)
3867 bfd_size_type align
;
3871 align
= 1 << bfd_get_section_alignment (abfd
, sec
);
3873 /* The section may have artificial alignment forced by a
3874 link script. Notice this case by the gap between the
3875 cumulative phdr lma and the section's lma. */
3876 if (p
->p_paddr
+ p
->p_memsz
< sec
->lma
)
3878 bfd_vma adjust
= sec
->lma
- (p
->p_paddr
+ p
->p_memsz
);
3880 p
->p_memsz
+= adjust
;
3881 if (p
->p_type
== PT_LOAD
3882 || (p
->p_type
== PT_NOTE
3883 && bfd_get_format (abfd
) == bfd_core
))
3888 if ((flags
& SEC_LOAD
) != 0
3889 || (flags
& SEC_THREAD_LOCAL
) != 0)
3890 p
->p_filesz
+= adjust
;
3893 if (p
->p_type
== PT_LOAD
)
3895 bfd_signed_vma adjust
;
3897 if ((flags
& SEC_LOAD
) != 0)
3899 adjust
= sec
->lma
- (p
->p_paddr
+ p
->p_memsz
);
3903 else if ((flags
& SEC_ALLOC
) != 0)
3905 /* The section VMA must equal the file position
3906 modulo the page size. FIXME: I'm not sure if
3907 this adjustment is really necessary. We used to
3908 not have the SEC_LOAD case just above, and then
3909 this was necessary, but now I'm not sure. */
3910 if ((abfd
->flags
& D_PAGED
) != 0)
3911 adjust
= vma_page_aligned_bias (sec
->vma
, voff
,
3914 adjust
= vma_page_aligned_bias (sec
->vma
, voff
,
3924 (* _bfd_error_handler
) (_("\
3925 Error: First section in segment (%s) starts at 0x%x whereas the segment starts at 0x%x"),
3926 bfd_section_name (abfd
, sec
),
3931 p
->p_memsz
+= adjust
;
3934 if ((flags
& SEC_LOAD
) != 0)
3935 p
->p_filesz
+= adjust
;
3940 /* We check SEC_HAS_CONTENTS here because if NOLOAD is
3941 used in a linker script we may have a section with
3942 SEC_LOAD clear but which is supposed to have
3944 if ((flags
& SEC_LOAD
) != 0
3945 || (flags
& SEC_HAS_CONTENTS
) != 0)
3946 off
+= sec
->_raw_size
;
3948 if ((flags
& SEC_ALLOC
) != 0
3949 && ((flags
& SEC_LOAD
) != 0
3950 || (flags
& SEC_THREAD_LOCAL
) == 0))
3951 voff
+= sec
->_raw_size
;
3954 if (p
->p_type
== PT_NOTE
&& bfd_get_format (abfd
) == bfd_core
)
3956 /* The actual "note" segment has i == 0.
3957 This is the one that actually contains everything. */
3961 p
->p_filesz
= sec
->_raw_size
;
3962 off
+= sec
->_raw_size
;
3967 /* Fake sections -- don't need to be written. */
3970 flags
= sec
->flags
= 0;
3977 if ((sec
->flags
& SEC_LOAD
) != 0
3978 || (sec
->flags
& SEC_THREAD_LOCAL
) == 0
3979 || p
->p_type
== PT_TLS
)
3980 p
->p_memsz
+= sec
->_raw_size
;
3982 if ((flags
& SEC_LOAD
) != 0)
3983 p
->p_filesz
+= sec
->_raw_size
;
3985 if (p
->p_type
== PT_TLS
3986 && sec
->_raw_size
== 0
3987 && (sec
->flags
& SEC_HAS_CONTENTS
) == 0)
3989 struct bfd_link_order
*o
;
3990 bfd_vma tbss_size
= 0;
3992 for (o
= sec
->link_order_head
; o
!= NULL
; o
= o
->next
)
3993 if (tbss_size
< o
->offset
+ o
->size
)
3994 tbss_size
= o
->offset
+ o
->size
;
3996 p
->p_memsz
+= tbss_size
;
3999 if (align
> p
->p_align
4000 && (p
->p_type
!= PT_LOAD
|| (abfd
->flags
& D_PAGED
) == 0))
4004 if (! m
->p_flags_valid
)
4007 if ((flags
& SEC_CODE
) != 0)
4009 if ((flags
& SEC_READONLY
) == 0)
4015 /* Now that we have set the section file positions, we can set up
4016 the file positions for the non PT_LOAD segments. */
4017 for (m
= elf_tdata (abfd
)->segment_map
, p
= phdrs
;
4021 if (p
->p_type
!= PT_LOAD
&& m
->count
> 0)
4023 BFD_ASSERT (! m
->includes_filehdr
&& ! m
->includes_phdrs
);
4024 p
->p_offset
= m
->sections
[0]->filepos
;
4028 if (m
->includes_filehdr
)
4030 p
->p_vaddr
= filehdr_vaddr
;
4031 if (! m
->p_paddr_valid
)
4032 p
->p_paddr
= filehdr_paddr
;
4034 else if (m
->includes_phdrs
)
4036 p
->p_vaddr
= phdrs_vaddr
;
4037 if (! m
->p_paddr_valid
)
4038 p
->p_paddr
= phdrs_paddr
;
4043 /* Clear out any program headers we allocated but did not use. */
4044 for (; count
< alloc
; count
++, p
++)
4046 memset (p
, 0, sizeof *p
);
4047 p
->p_type
= PT_NULL
;
4050 elf_tdata (abfd
)->phdr
= phdrs
;
4052 elf_tdata (abfd
)->next_file_pos
= off
;
4054 /* Write out the program headers. */
4055 if (bfd_seek (abfd
, (bfd_signed_vma
) bed
->s
->sizeof_ehdr
, SEEK_SET
) != 0
4056 || bed
->s
->write_out_phdrs (abfd
, phdrs
, alloc
) != 0)
4062 /* Get the size of the program header.
4064 If this is called by the linker before any of the section VMA's are set, it
4065 can't calculate the correct value for a strange memory layout. This only
4066 happens when SIZEOF_HEADERS is used in a linker script. In this case,
4067 SORTED_HDRS is NULL and we assume the normal scenario of one text and one
4068 data segment (exclusive of .interp and .dynamic).
4070 ??? User written scripts must either not use SIZEOF_HEADERS, or assume there
4071 will be two segments. */
4073 static bfd_size_type
4074 get_program_header_size (bfd
*abfd
)
4078 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4080 /* We can't return a different result each time we're called. */
4081 if (elf_tdata (abfd
)->program_header_size
!= 0)
4082 return elf_tdata (abfd
)->program_header_size
;
4084 if (elf_tdata (abfd
)->segment_map
!= NULL
)
4086 struct elf_segment_map
*m
;
4089 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
4091 elf_tdata (abfd
)->program_header_size
= segs
* bed
->s
->sizeof_phdr
;
4092 return elf_tdata (abfd
)->program_header_size
;
4095 /* Assume we will need exactly two PT_LOAD segments: one for text
4096 and one for data. */
4099 s
= bfd_get_section_by_name (abfd
, ".interp");
4100 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0)
4102 /* If we have a loadable interpreter section, we need a
4103 PT_INTERP segment. In this case, assume we also need a
4104 PT_PHDR segment, although that may not be true for all
4109 if (bfd_get_section_by_name (abfd
, ".dynamic") != NULL
)
4111 /* We need a PT_DYNAMIC segment. */
4115 if (elf_tdata (abfd
)->eh_frame_hdr
)
4117 /* We need a PT_GNU_EH_FRAME segment. */
4121 if (elf_tdata (abfd
)->stack_flags
)
4123 /* We need a PT_GNU_STACK segment. */
4127 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
4129 if ((s
->flags
& SEC_LOAD
) != 0
4130 && strncmp (s
->name
, ".note", 5) == 0)
4132 /* We need a PT_NOTE segment. */
4137 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
4139 if (s
->flags
& SEC_THREAD_LOCAL
)
4141 /* We need a PT_TLS segment. */
4147 /* Let the backend count up any program headers it might need. */
4148 if (bed
->elf_backend_additional_program_headers
)
4152 a
= (*bed
->elf_backend_additional_program_headers
) (abfd
);
4158 elf_tdata (abfd
)->program_header_size
= segs
* bed
->s
->sizeof_phdr
;
4159 return elf_tdata (abfd
)->program_header_size
;
4162 /* Work out the file positions of all the sections. This is called by
4163 _bfd_elf_compute_section_file_positions. All the section sizes and
4164 VMAs must be known before this is called.
4166 We do not consider reloc sections at this point, unless they form
4167 part of the loadable image. Reloc sections are assigned file
4168 positions in assign_file_positions_for_relocs, which is called by
4169 write_object_contents and final_link.
4171 We also don't set the positions of the .symtab and .strtab here. */
4174 assign_file_positions_except_relocs (bfd
*abfd
,
4175 struct bfd_link_info
*link_info
)
4177 struct elf_obj_tdata
* const tdata
= elf_tdata (abfd
);
4178 Elf_Internal_Ehdr
* const i_ehdrp
= elf_elfheader (abfd
);
4179 Elf_Internal_Shdr
** const i_shdrpp
= elf_elfsections (abfd
);
4180 unsigned int num_sec
= elf_numsections (abfd
);
4182 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4184 if ((abfd
->flags
& (EXEC_P
| DYNAMIC
)) == 0
4185 && bfd_get_format (abfd
) != bfd_core
)
4187 Elf_Internal_Shdr
**hdrpp
;
4190 /* Start after the ELF header. */
4191 off
= i_ehdrp
->e_ehsize
;
4193 /* We are not creating an executable, which means that we are
4194 not creating a program header, and that the actual order of
4195 the sections in the file is unimportant. */
4196 for (i
= 1, hdrpp
= i_shdrpp
+ 1; i
< num_sec
; i
++, hdrpp
++)
4198 Elf_Internal_Shdr
*hdr
;
4201 if (hdr
->sh_type
== SHT_REL
4202 || hdr
->sh_type
== SHT_RELA
4203 || i
== tdata
->symtab_section
4204 || i
== tdata
->symtab_shndx_section
4205 || i
== tdata
->strtab_section
)
4207 hdr
->sh_offset
= -1;
4210 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
4212 if (i
== SHN_LORESERVE
- 1)
4214 i
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4215 hdrpp
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4222 Elf_Internal_Shdr
**hdrpp
;
4224 /* Assign file positions for the loaded sections based on the
4225 assignment of sections to segments. */
4226 if (! assign_file_positions_for_segments (abfd
, link_info
))
4229 /* Assign file positions for the other sections. */
4231 off
= elf_tdata (abfd
)->next_file_pos
;
4232 for (i
= 1, hdrpp
= i_shdrpp
+ 1; i
< num_sec
; i
++, hdrpp
++)
4234 Elf_Internal_Shdr
*hdr
;
4237 if (hdr
->bfd_section
!= NULL
4238 && hdr
->bfd_section
->filepos
!= 0)
4239 hdr
->sh_offset
= hdr
->bfd_section
->filepos
;
4240 else if ((hdr
->sh_flags
& SHF_ALLOC
) != 0)
4242 ((*_bfd_error_handler
)
4243 (_("%s: warning: allocated section `%s' not in segment"),
4244 bfd_get_filename (abfd
),
4245 (hdr
->bfd_section
== NULL
4247 : hdr
->bfd_section
->name
)));
4248 if ((abfd
->flags
& D_PAGED
) != 0)
4249 off
+= vma_page_aligned_bias (hdr
->sh_addr
, off
,
4252 off
+= vma_page_aligned_bias (hdr
->sh_addr
, off
,
4254 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
,
4257 else if (hdr
->sh_type
== SHT_REL
4258 || hdr
->sh_type
== SHT_RELA
4259 || hdr
== i_shdrpp
[tdata
->symtab_section
]
4260 || hdr
== i_shdrpp
[tdata
->symtab_shndx_section
]
4261 || hdr
== i_shdrpp
[tdata
->strtab_section
])
4262 hdr
->sh_offset
= -1;
4264 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
4266 if (i
== SHN_LORESERVE
- 1)
4268 i
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4269 hdrpp
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4274 /* Place the section headers. */
4275 off
= align_file_position (off
, 1 << bed
->s
->log_file_align
);
4276 i_ehdrp
->e_shoff
= off
;
4277 off
+= i_ehdrp
->e_shnum
* i_ehdrp
->e_shentsize
;
4279 elf_tdata (abfd
)->next_file_pos
= off
;
4285 prep_headers (bfd
*abfd
)
4287 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
4288 Elf_Internal_Phdr
*i_phdrp
= 0; /* Program header table, internal form */
4289 Elf_Internal_Shdr
**i_shdrp
; /* Section header table, internal form */
4290 struct elf_strtab_hash
*shstrtab
;
4291 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4293 i_ehdrp
= elf_elfheader (abfd
);
4294 i_shdrp
= elf_elfsections (abfd
);
4296 shstrtab
= _bfd_elf_strtab_init ();
4297 if (shstrtab
== NULL
)
4300 elf_shstrtab (abfd
) = shstrtab
;
4302 i_ehdrp
->e_ident
[EI_MAG0
] = ELFMAG0
;
4303 i_ehdrp
->e_ident
[EI_MAG1
] = ELFMAG1
;
4304 i_ehdrp
->e_ident
[EI_MAG2
] = ELFMAG2
;
4305 i_ehdrp
->e_ident
[EI_MAG3
] = ELFMAG3
;
4307 i_ehdrp
->e_ident
[EI_CLASS
] = bed
->s
->elfclass
;
4308 i_ehdrp
->e_ident
[EI_DATA
] =
4309 bfd_big_endian (abfd
) ? ELFDATA2MSB
: ELFDATA2LSB
;
4310 i_ehdrp
->e_ident
[EI_VERSION
] = bed
->s
->ev_current
;
4312 if ((abfd
->flags
& DYNAMIC
) != 0)
4313 i_ehdrp
->e_type
= ET_DYN
;
4314 else if ((abfd
->flags
& EXEC_P
) != 0)
4315 i_ehdrp
->e_type
= ET_EXEC
;
4316 else if (bfd_get_format (abfd
) == bfd_core
)
4317 i_ehdrp
->e_type
= ET_CORE
;
4319 i_ehdrp
->e_type
= ET_REL
;
4321 switch (bfd_get_arch (abfd
))
4323 case bfd_arch_unknown
:
4324 i_ehdrp
->e_machine
= EM_NONE
;
4327 /* There used to be a long list of cases here, each one setting
4328 e_machine to the same EM_* macro #defined as ELF_MACHINE_CODE
4329 in the corresponding bfd definition. To avoid duplication,
4330 the switch was removed. Machines that need special handling
4331 can generally do it in elf_backend_final_write_processing(),
4332 unless they need the information earlier than the final write.
4333 Such need can generally be supplied by replacing the tests for
4334 e_machine with the conditions used to determine it. */
4336 i_ehdrp
->e_machine
= bed
->elf_machine_code
;
4339 i_ehdrp
->e_version
= bed
->s
->ev_current
;
4340 i_ehdrp
->e_ehsize
= bed
->s
->sizeof_ehdr
;
4342 /* No program header, for now. */
4343 i_ehdrp
->e_phoff
= 0;
4344 i_ehdrp
->e_phentsize
= 0;
4345 i_ehdrp
->e_phnum
= 0;
4347 /* Each bfd section is section header entry. */
4348 i_ehdrp
->e_entry
= bfd_get_start_address (abfd
);
4349 i_ehdrp
->e_shentsize
= bed
->s
->sizeof_shdr
;
4351 /* If we're building an executable, we'll need a program header table. */
4352 if (abfd
->flags
& EXEC_P
)
4354 /* It all happens later. */
4356 i_ehdrp
->e_phentsize
= sizeof (Elf_External_Phdr
);
4358 /* elf_build_phdrs() returns a (NULL-terminated) array of
4359 Elf_Internal_Phdrs. */
4360 i_phdrp
= elf_build_phdrs (abfd
, i_ehdrp
, i_shdrp
, &i_ehdrp
->e_phnum
);
4361 i_ehdrp
->e_phoff
= outbase
;
4362 outbase
+= i_ehdrp
->e_phentsize
* i_ehdrp
->e_phnum
;
4367 i_ehdrp
->e_phentsize
= 0;
4369 i_ehdrp
->e_phoff
= 0;
4372 elf_tdata (abfd
)->symtab_hdr
.sh_name
=
4373 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".symtab", FALSE
);
4374 elf_tdata (abfd
)->strtab_hdr
.sh_name
=
4375 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".strtab", FALSE
);
4376 elf_tdata (abfd
)->shstrtab_hdr
.sh_name
=
4377 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".shstrtab", FALSE
);
4378 if (elf_tdata (abfd
)->symtab_hdr
.sh_name
== (unsigned int) -1
4379 || elf_tdata (abfd
)->symtab_hdr
.sh_name
== (unsigned int) -1
4380 || elf_tdata (abfd
)->shstrtab_hdr
.sh_name
== (unsigned int) -1)
4386 /* Assign file positions for all the reloc sections which are not part
4387 of the loadable file image. */
4390 _bfd_elf_assign_file_positions_for_relocs (bfd
*abfd
)
4393 unsigned int i
, num_sec
;
4394 Elf_Internal_Shdr
**shdrpp
;
4396 off
= elf_tdata (abfd
)->next_file_pos
;
4398 num_sec
= elf_numsections (abfd
);
4399 for (i
= 1, shdrpp
= elf_elfsections (abfd
) + 1; i
< num_sec
; i
++, shdrpp
++)
4401 Elf_Internal_Shdr
*shdrp
;
4404 if ((shdrp
->sh_type
== SHT_REL
|| shdrp
->sh_type
== SHT_RELA
)
4405 && shdrp
->sh_offset
== -1)
4406 off
= _bfd_elf_assign_file_position_for_section (shdrp
, off
, TRUE
);
4409 elf_tdata (abfd
)->next_file_pos
= off
;
4413 _bfd_elf_write_object_contents (bfd
*abfd
)
4415 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4416 Elf_Internal_Ehdr
*i_ehdrp
;
4417 Elf_Internal_Shdr
**i_shdrp
;
4419 unsigned int count
, num_sec
;
4421 if (! abfd
->output_has_begun
4422 && ! _bfd_elf_compute_section_file_positions (abfd
, NULL
))
4425 i_shdrp
= elf_elfsections (abfd
);
4426 i_ehdrp
= elf_elfheader (abfd
);
4429 bfd_map_over_sections (abfd
, bed
->s
->write_relocs
, &failed
);
4433 _bfd_elf_assign_file_positions_for_relocs (abfd
);
4435 /* After writing the headers, we need to write the sections too... */
4436 num_sec
= elf_numsections (abfd
);
4437 for (count
= 1; count
< num_sec
; count
++)
4439 if (bed
->elf_backend_section_processing
)
4440 (*bed
->elf_backend_section_processing
) (abfd
, i_shdrp
[count
]);
4441 if (i_shdrp
[count
]->contents
)
4443 bfd_size_type amt
= i_shdrp
[count
]->sh_size
;
4445 if (bfd_seek (abfd
, i_shdrp
[count
]->sh_offset
, SEEK_SET
) != 0
4446 || bfd_bwrite (i_shdrp
[count
]->contents
, amt
, abfd
) != amt
)
4449 if (count
== SHN_LORESERVE
- 1)
4450 count
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4453 /* Write out the section header names. */
4454 if (bfd_seek (abfd
, elf_tdata (abfd
)->shstrtab_hdr
.sh_offset
, SEEK_SET
) != 0
4455 || ! _bfd_elf_strtab_emit (abfd
, elf_shstrtab (abfd
)))
4458 if (bed
->elf_backend_final_write_processing
)
4459 (*bed
->elf_backend_final_write_processing
) (abfd
,
4460 elf_tdata (abfd
)->linker
);
4462 return bed
->s
->write_shdrs_and_ehdr (abfd
);
4466 _bfd_elf_write_corefile_contents (bfd
*abfd
)
4468 /* Hopefully this can be done just like an object file. */
4469 return _bfd_elf_write_object_contents (abfd
);
4472 /* Given a section, search the header to find them. */
4475 _bfd_elf_section_from_bfd_section (bfd
*abfd
, struct bfd_section
*asect
)
4477 const struct elf_backend_data
*bed
;
4480 if (elf_section_data (asect
) != NULL
4481 && elf_section_data (asect
)->this_idx
!= 0)
4482 return elf_section_data (asect
)->this_idx
;
4484 if (bfd_is_abs_section (asect
))
4486 else if (bfd_is_com_section (asect
))
4488 else if (bfd_is_und_section (asect
))
4492 Elf_Internal_Shdr
**i_shdrp
= elf_elfsections (abfd
);
4493 int maxindex
= elf_numsections (abfd
);
4495 for (index
= 1; index
< maxindex
; index
++)
4497 Elf_Internal_Shdr
*hdr
= i_shdrp
[index
];
4499 if (hdr
!= NULL
&& hdr
->bfd_section
== asect
)
4505 bed
= get_elf_backend_data (abfd
);
4506 if (bed
->elf_backend_section_from_bfd_section
)
4510 if ((*bed
->elf_backend_section_from_bfd_section
) (abfd
, asect
, &retval
))
4515 bfd_set_error (bfd_error_nonrepresentable_section
);
4520 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
4524 _bfd_elf_symbol_from_bfd_symbol (bfd
*abfd
, asymbol
**asym_ptr_ptr
)
4526 asymbol
*asym_ptr
= *asym_ptr_ptr
;
4528 flagword flags
= asym_ptr
->flags
;
4530 /* When gas creates relocations against local labels, it creates its
4531 own symbol for the section, but does put the symbol into the
4532 symbol chain, so udata is 0. When the linker is generating
4533 relocatable output, this section symbol may be for one of the
4534 input sections rather than the output section. */
4535 if (asym_ptr
->udata
.i
== 0
4536 && (flags
& BSF_SECTION_SYM
)
4537 && asym_ptr
->section
)
4541 if (asym_ptr
->section
->output_section
!= NULL
)
4542 indx
= asym_ptr
->section
->output_section
->index
;
4544 indx
= asym_ptr
->section
->index
;
4545 if (indx
< elf_num_section_syms (abfd
)
4546 && elf_section_syms (abfd
)[indx
] != NULL
)
4547 asym_ptr
->udata
.i
= elf_section_syms (abfd
)[indx
]->udata
.i
;
4550 idx
= asym_ptr
->udata
.i
;
4554 /* This case can occur when using --strip-symbol on a symbol
4555 which is used in a relocation entry. */
4556 (*_bfd_error_handler
)
4557 (_("%s: symbol `%s' required but not present"),
4558 bfd_archive_filename (abfd
), bfd_asymbol_name (asym_ptr
));
4559 bfd_set_error (bfd_error_no_symbols
);
4566 "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n",
4567 (long) asym_ptr
, asym_ptr
->name
, idx
, flags
,
4568 elf_symbol_flags (flags
));
4576 /* Copy private BFD data. This copies any program header information. */
4579 copy_private_bfd_data (bfd
*ibfd
, bfd
*obfd
)
4581 Elf_Internal_Ehdr
*iehdr
;
4582 struct elf_segment_map
*map
;
4583 struct elf_segment_map
*map_first
;
4584 struct elf_segment_map
**pointer_to_map
;
4585 Elf_Internal_Phdr
*segment
;
4588 unsigned int num_segments
;
4589 bfd_boolean phdr_included
= FALSE
;
4590 bfd_vma maxpagesize
;
4591 struct elf_segment_map
*phdr_adjust_seg
= NULL
;
4592 unsigned int phdr_adjust_num
= 0;
4593 const struct elf_backend_data
*bed
;
4595 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
4596 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
4599 if (elf_tdata (ibfd
)->phdr
== NULL
)
4602 bed
= get_elf_backend_data (ibfd
);
4603 iehdr
= elf_elfheader (ibfd
);
4606 pointer_to_map
= &map_first
;
4608 num_segments
= elf_elfheader (ibfd
)->e_phnum
;
4609 maxpagesize
= get_elf_backend_data (obfd
)->maxpagesize
;
4611 /* Returns the end address of the segment + 1. */
4612 #define SEGMENT_END(segment, start) \
4613 (start + (segment->p_memsz > segment->p_filesz \
4614 ? segment->p_memsz : segment->p_filesz))
4616 #define SECTION_SIZE(section, segment) \
4617 (((section->flags & (SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) \
4618 != SEC_THREAD_LOCAL || segment->p_type == PT_TLS) \
4619 ? section->_raw_size : 0)
4621 /* Returns TRUE if the given section is contained within
4622 the given segment. VMA addresses are compared. */
4623 #define IS_CONTAINED_BY_VMA(section, segment) \
4624 (section->vma >= segment->p_vaddr \
4625 && (section->vma + SECTION_SIZE (section, segment) \
4626 <= (SEGMENT_END (segment, segment->p_vaddr))))
4628 /* Returns TRUE if the given section is contained within
4629 the given segment. LMA addresses are compared. */
4630 #define IS_CONTAINED_BY_LMA(section, segment, base) \
4631 (section->lma >= base \
4632 && (section->lma + SECTION_SIZE (section, segment) \
4633 <= SEGMENT_END (segment, base)))
4635 /* Special case: corefile "NOTE" section containing regs, prpsinfo etc. */
4636 #define IS_COREFILE_NOTE(p, s) \
4637 (p->p_type == PT_NOTE \
4638 && bfd_get_format (ibfd) == bfd_core \
4639 && s->vma == 0 && s->lma == 0 \
4640 && (bfd_vma) s->filepos >= p->p_offset \
4641 && ((bfd_vma) s->filepos + s->_raw_size \
4642 <= p->p_offset + p->p_filesz))
4644 /* The complicated case when p_vaddr is 0 is to handle the Solaris
4645 linker, which generates a PT_INTERP section with p_vaddr and
4646 p_memsz set to 0. */
4647 #define IS_SOLARIS_PT_INTERP(p, s) \
4649 && p->p_paddr == 0 \
4650 && p->p_memsz == 0 \
4651 && p->p_filesz > 0 \
4652 && (s->flags & SEC_HAS_CONTENTS) != 0 \
4653 && s->_raw_size > 0 \
4654 && (bfd_vma) s->filepos >= p->p_offset \
4655 && ((bfd_vma) s->filepos + s->_raw_size \
4656 <= p->p_offset + p->p_filesz))
4658 /* Decide if the given section should be included in the given segment.
4659 A section will be included if:
4660 1. It is within the address space of the segment -- we use the LMA
4661 if that is set for the segment and the VMA otherwise,
4662 2. It is an allocated segment,
4663 3. There is an output section associated with it,
4664 4. The section has not already been allocated to a previous segment.
4665 5. PT_GNU_STACK segments do not include any sections.
4666 6. PT_TLS segment includes only SHF_TLS sections.
4667 7. SHF_TLS sections are only in PT_TLS or PT_LOAD segments. */
4668 #define INCLUDE_SECTION_IN_SEGMENT(section, segment, bed) \
4669 ((((segment->p_paddr \
4670 ? IS_CONTAINED_BY_LMA (section, segment, segment->p_paddr) \
4671 : IS_CONTAINED_BY_VMA (section, segment)) \
4672 && (section->flags & SEC_ALLOC) != 0) \
4673 || IS_COREFILE_NOTE (segment, section)) \
4674 && section->output_section != NULL \
4675 && segment->p_type != PT_GNU_STACK \
4676 && (segment->p_type != PT_TLS \
4677 || (section->flags & SEC_THREAD_LOCAL)) \
4678 && (segment->p_type == PT_LOAD \
4679 || segment->p_type == PT_TLS \
4680 || (section->flags & SEC_THREAD_LOCAL) == 0) \
4681 && ! section->segment_mark)
4683 /* Returns TRUE iff seg1 starts after the end of seg2. */
4684 #define SEGMENT_AFTER_SEGMENT(seg1, seg2, field) \
4685 (seg1->field >= SEGMENT_END (seg2, seg2->field))
4687 /* Returns TRUE iff seg1 and seg2 overlap. Segments overlap iff both
4688 their VMA address ranges and their LMA address ranges overlap.
4689 It is possible to have overlapping VMA ranges without overlapping LMA
4690 ranges. RedBoot images for example can have both .data and .bss mapped
4691 to the same VMA range, but with the .data section mapped to a different
4693 #define SEGMENT_OVERLAPS(seg1, seg2) \
4694 ( !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_vaddr) \
4695 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_vaddr)) \
4696 && !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_paddr) \
4697 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_paddr)))
4699 /* Initialise the segment mark field. */
4700 for (section
= ibfd
->sections
; section
!= NULL
; section
= section
->next
)
4701 section
->segment_mark
= FALSE
;
4703 /* Scan through the segments specified in the program header
4704 of the input BFD. For this first scan we look for overlaps
4705 in the loadable segments. These can be created by weird
4706 parameters to objcopy. Also, fix some solaris weirdness. */
4707 for (i
= 0, segment
= elf_tdata (ibfd
)->phdr
;
4712 Elf_Internal_Phdr
*segment2
;
4714 if (segment
->p_type
== PT_INTERP
)
4715 for (section
= ibfd
->sections
; section
; section
= section
->next
)
4716 if (IS_SOLARIS_PT_INTERP (segment
, section
))
4718 /* Mininal change so that the normal section to segment
4719 assignment code will work. */
4720 segment
->p_vaddr
= section
->vma
;
4724 if (segment
->p_type
!= PT_LOAD
)
4727 /* Determine if this segment overlaps any previous segments. */
4728 for (j
= 0, segment2
= elf_tdata (ibfd
)->phdr
; j
< i
; j
++, segment2
++)
4730 bfd_signed_vma extra_length
;
4732 if (segment2
->p_type
!= PT_LOAD
4733 || ! SEGMENT_OVERLAPS (segment
, segment2
))
4736 /* Merge the two segments together. */
4737 if (segment2
->p_vaddr
< segment
->p_vaddr
)
4739 /* Extend SEGMENT2 to include SEGMENT and then delete
4742 SEGMENT_END (segment
, segment
->p_vaddr
)
4743 - SEGMENT_END (segment2
, segment2
->p_vaddr
);
4745 if (extra_length
> 0)
4747 segment2
->p_memsz
+= extra_length
;
4748 segment2
->p_filesz
+= extra_length
;
4751 segment
->p_type
= PT_NULL
;
4753 /* Since we have deleted P we must restart the outer loop. */
4755 segment
= elf_tdata (ibfd
)->phdr
;
4760 /* Extend SEGMENT to include SEGMENT2 and then delete
4763 SEGMENT_END (segment2
, segment2
->p_vaddr
)
4764 - SEGMENT_END (segment
, segment
->p_vaddr
);
4766 if (extra_length
> 0)
4768 segment
->p_memsz
+= extra_length
;
4769 segment
->p_filesz
+= extra_length
;
4772 segment2
->p_type
= PT_NULL
;
4777 /* The second scan attempts to assign sections to segments. */
4778 for (i
= 0, segment
= elf_tdata (ibfd
)->phdr
;
4782 unsigned int section_count
;
4783 asection
** sections
;
4784 asection
* output_section
;
4786 bfd_vma matching_lma
;
4787 bfd_vma suggested_lma
;
4791 if (segment
->p_type
== PT_NULL
)
4794 /* Compute how many sections might be placed into this segment. */
4795 for (section
= ibfd
->sections
, section_count
= 0;
4797 section
= section
->next
)
4798 if (INCLUDE_SECTION_IN_SEGMENT (section
, segment
, bed
))
4801 /* Allocate a segment map big enough to contain
4802 all of the sections we have selected. */
4803 amt
= sizeof (struct elf_segment_map
);
4804 amt
+= ((bfd_size_type
) section_count
- 1) * sizeof (asection
*);
4805 map
= bfd_alloc (obfd
, amt
);
4809 /* Initialise the fields of the segment map. Default to
4810 using the physical address of the segment in the input BFD. */
4812 map
->p_type
= segment
->p_type
;
4813 map
->p_flags
= segment
->p_flags
;
4814 map
->p_flags_valid
= 1;
4815 map
->p_paddr
= segment
->p_paddr
;
4816 map
->p_paddr_valid
= 1;
4818 /* Determine if this segment contains the ELF file header
4819 and if it contains the program headers themselves. */
4820 map
->includes_filehdr
= (segment
->p_offset
== 0
4821 && segment
->p_filesz
>= iehdr
->e_ehsize
);
4823 map
->includes_phdrs
= 0;
4825 if (! phdr_included
|| segment
->p_type
!= PT_LOAD
)
4827 map
->includes_phdrs
=
4828 (segment
->p_offset
<= (bfd_vma
) iehdr
->e_phoff
4829 && (segment
->p_offset
+ segment
->p_filesz
4830 >= ((bfd_vma
) iehdr
->e_phoff
4831 + iehdr
->e_phnum
* iehdr
->e_phentsize
)));
4833 if (segment
->p_type
== PT_LOAD
&& map
->includes_phdrs
)
4834 phdr_included
= TRUE
;
4837 if (section_count
== 0)
4839 /* Special segments, such as the PT_PHDR segment, may contain
4840 no sections, but ordinary, loadable segments should contain
4841 something. They are allowed by the ELF spec however, so only
4842 a warning is produced. */
4843 if (segment
->p_type
== PT_LOAD
)
4844 (*_bfd_error_handler
)
4845 (_("%s: warning: Empty loadable segment detected, is this intentional ?\n"),
4846 bfd_archive_filename (ibfd
));
4849 *pointer_to_map
= map
;
4850 pointer_to_map
= &map
->next
;
4855 /* Now scan the sections in the input BFD again and attempt
4856 to add their corresponding output sections to the segment map.
4857 The problem here is how to handle an output section which has
4858 been moved (ie had its LMA changed). There are four possibilities:
4860 1. None of the sections have been moved.
4861 In this case we can continue to use the segment LMA from the
4864 2. All of the sections have been moved by the same amount.
4865 In this case we can change the segment's LMA to match the LMA
4866 of the first section.
4868 3. Some of the sections have been moved, others have not.
4869 In this case those sections which have not been moved can be
4870 placed in the current segment which will have to have its size,
4871 and possibly its LMA changed, and a new segment or segments will
4872 have to be created to contain the other sections.
4874 4. The sections have been moved, but not by the same amount.
4875 In this case we can change the segment's LMA to match the LMA
4876 of the first section and we will have to create a new segment
4877 or segments to contain the other sections.
4879 In order to save time, we allocate an array to hold the section
4880 pointers that we are interested in. As these sections get assigned
4881 to a segment, they are removed from this array. */
4883 /* Gcc 2.96 miscompiles this code on mips. Don't do casting here
4884 to work around this long long bug. */
4885 amt
= section_count
* sizeof (asection
*);
4886 sections
= bfd_malloc (amt
);
4887 if (sections
== NULL
)
4890 /* Step One: Scan for segment vs section LMA conflicts.
4891 Also add the sections to the section array allocated above.
4892 Also add the sections to the current segment. In the common
4893 case, where the sections have not been moved, this means that
4894 we have completely filled the segment, and there is nothing
4900 for (j
= 0, section
= ibfd
->sections
;
4902 section
= section
->next
)
4904 if (INCLUDE_SECTION_IN_SEGMENT (section
, segment
, bed
))
4906 output_section
= section
->output_section
;
4908 sections
[j
++] = section
;
4910 /* The Solaris native linker always sets p_paddr to 0.
4911 We try to catch that case here, and set it to the
4912 correct value. Note - some backends require that
4913 p_paddr be left as zero. */
4914 if (segment
->p_paddr
== 0
4915 && segment
->p_vaddr
!= 0
4916 && (! bed
->want_p_paddr_set_to_zero
)
4918 && output_section
->lma
!= 0
4919 && (output_section
->vma
== (segment
->p_vaddr
4920 + (map
->includes_filehdr
4923 + (map
->includes_phdrs
4925 * iehdr
->e_phentsize
)
4927 map
->p_paddr
= segment
->p_vaddr
;
4929 /* Match up the physical address of the segment with the
4930 LMA address of the output section. */
4931 if (IS_CONTAINED_BY_LMA (output_section
, segment
, map
->p_paddr
)
4932 || IS_COREFILE_NOTE (segment
, section
)
4933 || (bed
->want_p_paddr_set_to_zero
&&
4934 IS_CONTAINED_BY_VMA (output_section
, segment
))
4937 if (matching_lma
== 0)
4938 matching_lma
= output_section
->lma
;
4940 /* We assume that if the section fits within the segment
4941 then it does not overlap any other section within that
4943 map
->sections
[isec
++] = output_section
;
4945 else if (suggested_lma
== 0)
4946 suggested_lma
= output_section
->lma
;
4950 BFD_ASSERT (j
== section_count
);
4952 /* Step Two: Adjust the physical address of the current segment,
4954 if (isec
== section_count
)
4956 /* All of the sections fitted within the segment as currently
4957 specified. This is the default case. Add the segment to
4958 the list of built segments and carry on to process the next
4959 program header in the input BFD. */
4960 map
->count
= section_count
;
4961 *pointer_to_map
= map
;
4962 pointer_to_map
= &map
->next
;
4969 if (matching_lma
!= 0)
4971 /* At least one section fits inside the current segment.
4972 Keep it, but modify its physical address to match the
4973 LMA of the first section that fitted. */
4974 map
->p_paddr
= matching_lma
;
4978 /* None of the sections fitted inside the current segment.
4979 Change the current segment's physical address to match
4980 the LMA of the first section. */
4981 map
->p_paddr
= suggested_lma
;
4984 /* Offset the segment physical address from the lma
4985 to allow for space taken up by elf headers. */
4986 if (map
->includes_filehdr
)
4987 map
->p_paddr
-= iehdr
->e_ehsize
;
4989 if (map
->includes_phdrs
)
4991 map
->p_paddr
-= iehdr
->e_phnum
* iehdr
->e_phentsize
;
4993 /* iehdr->e_phnum is just an estimate of the number
4994 of program headers that we will need. Make a note
4995 here of the number we used and the segment we chose
4996 to hold these headers, so that we can adjust the
4997 offset when we know the correct value. */
4998 phdr_adjust_num
= iehdr
->e_phnum
;
4999 phdr_adjust_seg
= map
;
5003 /* Step Three: Loop over the sections again, this time assigning
5004 those that fit to the current segment and removing them from the
5005 sections array; but making sure not to leave large gaps. Once all
5006 possible sections have been assigned to the current segment it is
5007 added to the list of built segments and if sections still remain
5008 to be assigned, a new segment is constructed before repeating
5016 /* Fill the current segment with sections that fit. */
5017 for (j
= 0; j
< section_count
; j
++)
5019 section
= sections
[j
];
5021 if (section
== NULL
)
5024 output_section
= section
->output_section
;
5026 BFD_ASSERT (output_section
!= NULL
);
5028 if (IS_CONTAINED_BY_LMA (output_section
, segment
, map
->p_paddr
)
5029 || IS_COREFILE_NOTE (segment
, section
))
5031 if (map
->count
== 0)
5033 /* If the first section in a segment does not start at
5034 the beginning of the segment, then something is
5036 if (output_section
->lma
!=
5038 + (map
->includes_filehdr
? iehdr
->e_ehsize
: 0)
5039 + (map
->includes_phdrs
5040 ? iehdr
->e_phnum
* iehdr
->e_phentsize
5046 asection
* prev_sec
;
5048 prev_sec
= map
->sections
[map
->count
- 1];
5050 /* If the gap between the end of the previous section
5051 and the start of this section is more than
5052 maxpagesize then we need to start a new segment. */
5053 if ((BFD_ALIGN (prev_sec
->lma
+ prev_sec
->_raw_size
,
5055 < BFD_ALIGN (output_section
->lma
, maxpagesize
))
5056 || ((prev_sec
->lma
+ prev_sec
->_raw_size
)
5057 > output_section
->lma
))
5059 if (suggested_lma
== 0)
5060 suggested_lma
= output_section
->lma
;
5066 map
->sections
[map
->count
++] = output_section
;
5069 section
->segment_mark
= TRUE
;
5071 else if (suggested_lma
== 0)
5072 suggested_lma
= output_section
->lma
;
5075 BFD_ASSERT (map
->count
> 0);
5077 /* Add the current segment to the list of built segments. */
5078 *pointer_to_map
= map
;
5079 pointer_to_map
= &map
->next
;
5081 if (isec
< section_count
)
5083 /* We still have not allocated all of the sections to
5084 segments. Create a new segment here, initialise it
5085 and carry on looping. */
5086 amt
= sizeof (struct elf_segment_map
);
5087 amt
+= ((bfd_size_type
) section_count
- 1) * sizeof (asection
*);
5088 map
= bfd_alloc (obfd
, amt
);
5095 /* Initialise the fields of the segment map. Set the physical
5096 physical address to the LMA of the first section that has
5097 not yet been assigned. */
5099 map
->p_type
= segment
->p_type
;
5100 map
->p_flags
= segment
->p_flags
;
5101 map
->p_flags_valid
= 1;
5102 map
->p_paddr
= suggested_lma
;
5103 map
->p_paddr_valid
= 1;
5104 map
->includes_filehdr
= 0;
5105 map
->includes_phdrs
= 0;
5108 while (isec
< section_count
);
5113 /* The Solaris linker creates program headers in which all the
5114 p_paddr fields are zero. When we try to objcopy or strip such a
5115 file, we get confused. Check for this case, and if we find it
5116 reset the p_paddr_valid fields. */
5117 for (map
= map_first
; map
!= NULL
; map
= map
->next
)
5118 if (map
->p_paddr
!= 0)
5121 for (map
= map_first
; map
!= NULL
; map
= map
->next
)
5122 map
->p_paddr_valid
= 0;
5124 elf_tdata (obfd
)->segment_map
= map_first
;
5126 /* If we had to estimate the number of program headers that were
5127 going to be needed, then check our estimate now and adjust
5128 the offset if necessary. */
5129 if (phdr_adjust_seg
!= NULL
)
5133 for (count
= 0, map
= map_first
; map
!= NULL
; map
= map
->next
)
5136 if (count
> phdr_adjust_num
)
5137 phdr_adjust_seg
->p_paddr
5138 -= (count
- phdr_adjust_num
) * iehdr
->e_phentsize
;
5142 /* Final Step: Sort the segments into ascending order of physical
5144 if (map_first
!= NULL
)
5146 struct elf_segment_map
*prev
;
5149 for (map
= map_first
->next
; map
!= NULL
; prev
= map
, map
= map
->next
)
5151 /* Yes I know - its a bubble sort.... */
5152 if (map
->next
!= NULL
&& (map
->next
->p_paddr
< map
->p_paddr
))
5154 /* Swap map and map->next. */
5155 prev
->next
= map
->next
;
5156 map
->next
= map
->next
->next
;
5157 prev
->next
->next
= map
;
5168 #undef IS_CONTAINED_BY_VMA
5169 #undef IS_CONTAINED_BY_LMA
5170 #undef IS_COREFILE_NOTE
5171 #undef IS_SOLARIS_PT_INTERP
5172 #undef INCLUDE_SECTION_IN_SEGMENT
5173 #undef SEGMENT_AFTER_SEGMENT
5174 #undef SEGMENT_OVERLAPS
5178 /* Copy private section information. This copies over the entsize
5179 field, and sometimes the info field. */
5182 _bfd_elf_copy_private_section_data (bfd
*ibfd
,
5187 Elf_Internal_Shdr
*ihdr
, *ohdr
;
5189 if (ibfd
->xvec
->flavour
!= bfd_target_elf_flavour
5190 || obfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
5193 if (elf_tdata (obfd
)->segment_map
== NULL
&& elf_tdata (ibfd
)->phdr
!= NULL
)
5197 /* Only set up the segments if there are no more SEC_ALLOC
5198 sections. FIXME: This won't do the right thing if objcopy is
5199 used to remove the last SEC_ALLOC section, since objcopy
5200 won't call this routine in that case. */
5201 for (s
= isec
->next
; s
!= NULL
; s
= s
->next
)
5202 if ((s
->flags
& SEC_ALLOC
) != 0)
5206 if (! copy_private_bfd_data (ibfd
, obfd
))
5211 ihdr
= &elf_section_data (isec
)->this_hdr
;
5212 ohdr
= &elf_section_data (osec
)->this_hdr
;
5214 ohdr
->sh_entsize
= ihdr
->sh_entsize
;
5216 if (ihdr
->sh_type
== SHT_SYMTAB
5217 || ihdr
->sh_type
== SHT_DYNSYM
5218 || ihdr
->sh_type
== SHT_GNU_verneed
5219 || ihdr
->sh_type
== SHT_GNU_verdef
)
5220 ohdr
->sh_info
= ihdr
->sh_info
;
5222 /* Set things up for objcopy. The output SHT_GROUP section will
5223 have its elf_next_in_group pointing back to the input group
5225 elf_next_in_group (osec
) = elf_next_in_group (isec
);
5226 elf_group_name (osec
) = elf_group_name (isec
);
5228 osec
->use_rela_p
= isec
->use_rela_p
;
5233 /* Copy private symbol information. If this symbol is in a section
5234 which we did not map into a BFD section, try to map the section
5235 index correctly. We use special macro definitions for the mapped
5236 section indices; these definitions are interpreted by the
5237 swap_out_syms function. */
5239 #define MAP_ONESYMTAB (SHN_HIOS + 1)
5240 #define MAP_DYNSYMTAB (SHN_HIOS + 2)
5241 #define MAP_STRTAB (SHN_HIOS + 3)
5242 #define MAP_SHSTRTAB (SHN_HIOS + 4)
5243 #define MAP_SYM_SHNDX (SHN_HIOS + 5)
5246 _bfd_elf_copy_private_symbol_data (bfd
*ibfd
,
5251 elf_symbol_type
*isym
, *osym
;
5253 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
5254 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
5257 isym
= elf_symbol_from (ibfd
, isymarg
);
5258 osym
= elf_symbol_from (obfd
, osymarg
);
5262 && bfd_is_abs_section (isym
->symbol
.section
))
5266 shndx
= isym
->internal_elf_sym
.st_shndx
;
5267 if (shndx
== elf_onesymtab (ibfd
))
5268 shndx
= MAP_ONESYMTAB
;
5269 else if (shndx
== elf_dynsymtab (ibfd
))
5270 shndx
= MAP_DYNSYMTAB
;
5271 else if (shndx
== elf_tdata (ibfd
)->strtab_section
)
5273 else if (shndx
== elf_tdata (ibfd
)->shstrtab_section
)
5274 shndx
= MAP_SHSTRTAB
;
5275 else if (shndx
== elf_tdata (ibfd
)->symtab_shndx_section
)
5276 shndx
= MAP_SYM_SHNDX
;
5277 osym
->internal_elf_sym
.st_shndx
= shndx
;
5283 /* Swap out the symbols. */
5286 swap_out_syms (bfd
*abfd
,
5287 struct bfd_strtab_hash
**sttp
,
5290 const struct elf_backend_data
*bed
;
5293 struct bfd_strtab_hash
*stt
;
5294 Elf_Internal_Shdr
*symtab_hdr
;
5295 Elf_Internal_Shdr
*symtab_shndx_hdr
;
5296 Elf_Internal_Shdr
*symstrtab_hdr
;
5297 char *outbound_syms
;
5298 char *outbound_shndx
;
5301 bfd_boolean name_local_sections
;
5303 if (!elf_map_symbols (abfd
))
5306 /* Dump out the symtabs. */
5307 stt
= _bfd_elf_stringtab_init ();
5311 bed
= get_elf_backend_data (abfd
);
5312 symcount
= bfd_get_symcount (abfd
);
5313 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
5314 symtab_hdr
->sh_type
= SHT_SYMTAB
;
5315 symtab_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
5316 symtab_hdr
->sh_size
= symtab_hdr
->sh_entsize
* (symcount
+ 1);
5317 symtab_hdr
->sh_info
= elf_num_locals (abfd
) + 1;
5318 symtab_hdr
->sh_addralign
= 1 << bed
->s
->log_file_align
;
5320 symstrtab_hdr
= &elf_tdata (abfd
)->strtab_hdr
;
5321 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
5323 amt
= (bfd_size_type
) (1 + symcount
) * bed
->s
->sizeof_sym
;
5324 outbound_syms
= bfd_alloc (abfd
, amt
);
5325 if (outbound_syms
== NULL
)
5327 _bfd_stringtab_free (stt
);
5330 symtab_hdr
->contents
= outbound_syms
;
5332 outbound_shndx
= NULL
;
5333 symtab_shndx_hdr
= &elf_tdata (abfd
)->symtab_shndx_hdr
;
5334 if (symtab_shndx_hdr
->sh_name
!= 0)
5336 amt
= (bfd_size_type
) (1 + symcount
) * sizeof (Elf_External_Sym_Shndx
);
5337 outbound_shndx
= bfd_zalloc (abfd
, amt
);
5338 if (outbound_shndx
== NULL
)
5340 _bfd_stringtab_free (stt
);
5344 symtab_shndx_hdr
->contents
= outbound_shndx
;
5345 symtab_shndx_hdr
->sh_type
= SHT_SYMTAB_SHNDX
;
5346 symtab_shndx_hdr
->sh_size
= amt
;
5347 symtab_shndx_hdr
->sh_addralign
= sizeof (Elf_External_Sym_Shndx
);
5348 symtab_shndx_hdr
->sh_entsize
= sizeof (Elf_External_Sym_Shndx
);
5351 /* Now generate the data (for "contents"). */
5353 /* Fill in zeroth symbol and swap it out. */
5354 Elf_Internal_Sym sym
;
5360 sym
.st_shndx
= SHN_UNDEF
;
5361 bed
->s
->swap_symbol_out (abfd
, &sym
, outbound_syms
, outbound_shndx
);
5362 outbound_syms
+= bed
->s
->sizeof_sym
;
5363 if (outbound_shndx
!= NULL
)
5364 outbound_shndx
+= sizeof (Elf_External_Sym_Shndx
);
5368 = (bed
->elf_backend_name_local_section_symbols
5369 && bed
->elf_backend_name_local_section_symbols (abfd
));
5371 syms
= bfd_get_outsymbols (abfd
);
5372 for (idx
= 0; idx
< symcount
; idx
++)
5374 Elf_Internal_Sym sym
;
5375 bfd_vma value
= syms
[idx
]->value
;
5376 elf_symbol_type
*type_ptr
;
5377 flagword flags
= syms
[idx
]->flags
;
5380 if (!name_local_sections
5381 && (flags
& (BSF_SECTION_SYM
| BSF_GLOBAL
)) == BSF_SECTION_SYM
)
5383 /* Local section symbols have no name. */
5388 sym
.st_name
= (unsigned long) _bfd_stringtab_add (stt
,
5391 if (sym
.st_name
== (unsigned long) -1)
5393 _bfd_stringtab_free (stt
);
5398 type_ptr
= elf_symbol_from (abfd
, syms
[idx
]);
5400 if ((flags
& BSF_SECTION_SYM
) == 0
5401 && bfd_is_com_section (syms
[idx
]->section
))
5403 /* ELF common symbols put the alignment into the `value' field,
5404 and the size into the `size' field. This is backwards from
5405 how BFD handles it, so reverse it here. */
5406 sym
.st_size
= value
;
5407 if (type_ptr
== NULL
5408 || type_ptr
->internal_elf_sym
.st_value
== 0)
5409 sym
.st_value
= value
>= 16 ? 16 : (1 << bfd_log2 (value
));
5411 sym
.st_value
= type_ptr
->internal_elf_sym
.st_value
;
5412 sym
.st_shndx
= _bfd_elf_section_from_bfd_section
5413 (abfd
, syms
[idx
]->section
);
5417 asection
*sec
= syms
[idx
]->section
;
5420 if (sec
->output_section
)
5422 value
+= sec
->output_offset
;
5423 sec
= sec
->output_section
;
5426 /* Don't add in the section vma for relocatable output. */
5427 if (! relocatable_p
)
5429 sym
.st_value
= value
;
5430 sym
.st_size
= type_ptr
? type_ptr
->internal_elf_sym
.st_size
: 0;
5432 if (bfd_is_abs_section (sec
)
5434 && type_ptr
->internal_elf_sym
.st_shndx
!= 0)
5436 /* This symbol is in a real ELF section which we did
5437 not create as a BFD section. Undo the mapping done
5438 by copy_private_symbol_data. */
5439 shndx
= type_ptr
->internal_elf_sym
.st_shndx
;
5443 shndx
= elf_onesymtab (abfd
);
5446 shndx
= elf_dynsymtab (abfd
);
5449 shndx
= elf_tdata (abfd
)->strtab_section
;
5452 shndx
= elf_tdata (abfd
)->shstrtab_section
;
5455 shndx
= elf_tdata (abfd
)->symtab_shndx_section
;
5463 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec
);
5469 /* Writing this would be a hell of a lot easier if
5470 we had some decent documentation on bfd, and
5471 knew what to expect of the library, and what to
5472 demand of applications. For example, it
5473 appears that `objcopy' might not set the
5474 section of a symbol to be a section that is
5475 actually in the output file. */
5476 sec2
= bfd_get_section_by_name (abfd
, sec
->name
);
5479 _bfd_error_handler (_("\
5480 Unable to find equivalent output section for symbol '%s' from section '%s'"),
5481 syms
[idx
]->name
? syms
[idx
]->name
: "<Local sym>",
5483 bfd_set_error (bfd_error_invalid_operation
);
5484 _bfd_stringtab_free (stt
);
5488 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec2
);
5489 BFD_ASSERT (shndx
!= -1);
5493 sym
.st_shndx
= shndx
;
5496 if ((flags
& BSF_THREAD_LOCAL
) != 0)
5498 else if ((flags
& BSF_FUNCTION
) != 0)
5500 else if ((flags
& BSF_OBJECT
) != 0)
5505 if (syms
[idx
]->section
->flags
& SEC_THREAD_LOCAL
)
5508 /* Processor-specific types. */
5509 if (type_ptr
!= NULL
5510 && bed
->elf_backend_get_symbol_type
)
5511 type
= ((*bed
->elf_backend_get_symbol_type
)
5512 (&type_ptr
->internal_elf_sym
, type
));
5514 if (flags
& BSF_SECTION_SYM
)
5516 if (flags
& BSF_GLOBAL
)
5517 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, STT_SECTION
);
5519 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_SECTION
);
5521 else if (bfd_is_com_section (syms
[idx
]->section
))
5522 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, type
);
5523 else if (bfd_is_und_section (syms
[idx
]->section
))
5524 sym
.st_info
= ELF_ST_INFO (((flags
& BSF_WEAK
)
5528 else if (flags
& BSF_FILE
)
5529 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FILE
);
5532 int bind
= STB_LOCAL
;
5534 if (flags
& BSF_LOCAL
)
5536 else if (flags
& BSF_WEAK
)
5538 else if (flags
& BSF_GLOBAL
)
5541 sym
.st_info
= ELF_ST_INFO (bind
, type
);
5544 if (type_ptr
!= NULL
)
5545 sym
.st_other
= type_ptr
->internal_elf_sym
.st_other
;
5549 bed
->s
->swap_symbol_out (abfd
, &sym
, outbound_syms
, outbound_shndx
);
5550 outbound_syms
+= bed
->s
->sizeof_sym
;
5551 if (outbound_shndx
!= NULL
)
5552 outbound_shndx
+= sizeof (Elf_External_Sym_Shndx
);
5556 symstrtab_hdr
->sh_size
= _bfd_stringtab_size (stt
);
5557 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
5559 symstrtab_hdr
->sh_flags
= 0;
5560 symstrtab_hdr
->sh_addr
= 0;
5561 symstrtab_hdr
->sh_entsize
= 0;
5562 symstrtab_hdr
->sh_link
= 0;
5563 symstrtab_hdr
->sh_info
= 0;
5564 symstrtab_hdr
->sh_addralign
= 1;
5569 /* Return the number of bytes required to hold the symtab vector.
5571 Note that we base it on the count plus 1, since we will null terminate
5572 the vector allocated based on this size. However, the ELF symbol table
5573 always has a dummy entry as symbol #0, so it ends up even. */
5576 _bfd_elf_get_symtab_upper_bound (bfd
*abfd
)
5580 Elf_Internal_Shdr
*hdr
= &elf_tdata (abfd
)->symtab_hdr
;
5582 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
5583 symtab_size
= (symcount
+ 1) * (sizeof (asymbol
*));
5585 symtab_size
-= sizeof (asymbol
*);
5591 _bfd_elf_get_dynamic_symtab_upper_bound (bfd
*abfd
)
5595 Elf_Internal_Shdr
*hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
5597 if (elf_dynsymtab (abfd
) == 0)
5599 bfd_set_error (bfd_error_invalid_operation
);
5603 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
5604 symtab_size
= (symcount
+ 1) * (sizeof (asymbol
*));
5606 symtab_size
-= sizeof (asymbol
*);
5612 _bfd_elf_get_reloc_upper_bound (bfd
*abfd ATTRIBUTE_UNUSED
,
5615 return (asect
->reloc_count
+ 1) * sizeof (arelent
*);
5618 /* Canonicalize the relocs. */
5621 _bfd_elf_canonicalize_reloc (bfd
*abfd
,
5628 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
5630 if (! bed
->s
->slurp_reloc_table (abfd
, section
, symbols
, FALSE
))
5633 tblptr
= section
->relocation
;
5634 for (i
= 0; i
< section
->reloc_count
; i
++)
5635 *relptr
++ = tblptr
++;
5639 return section
->reloc_count
;
5643 _bfd_elf_canonicalize_symtab (bfd
*abfd
, asymbol
**allocation
)
5645 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
5646 long symcount
= bed
->s
->slurp_symbol_table (abfd
, allocation
, FALSE
);
5649 bfd_get_symcount (abfd
) = symcount
;
5654 _bfd_elf_canonicalize_dynamic_symtab (bfd
*abfd
,
5655 asymbol
**allocation
)
5657 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
5658 long symcount
= bed
->s
->slurp_symbol_table (abfd
, allocation
, TRUE
);
5661 bfd_get_dynamic_symcount (abfd
) = symcount
;
5665 /* Return the size required for the dynamic reloc entries. Any
5666 section that was actually installed in the BFD, and has type
5667 SHT_REL or SHT_RELA, and uses the dynamic symbol table, is
5668 considered to be a dynamic reloc section. */
5671 _bfd_elf_get_dynamic_reloc_upper_bound (bfd
*abfd
)
5676 if (elf_dynsymtab (abfd
) == 0)
5678 bfd_set_error (bfd_error_invalid_operation
);
5682 ret
= sizeof (arelent
*);
5683 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
5684 if (elf_section_data (s
)->this_hdr
.sh_link
== elf_dynsymtab (abfd
)
5685 && (elf_section_data (s
)->this_hdr
.sh_type
== SHT_REL
5686 || elf_section_data (s
)->this_hdr
.sh_type
== SHT_RELA
))
5687 ret
+= ((s
->_raw_size
/ elf_section_data (s
)->this_hdr
.sh_entsize
)
5688 * sizeof (arelent
*));
5693 /* Canonicalize the dynamic relocation entries. Note that we return
5694 the dynamic relocations as a single block, although they are
5695 actually associated with particular sections; the interface, which
5696 was designed for SunOS style shared libraries, expects that there
5697 is only one set of dynamic relocs. Any section that was actually
5698 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses
5699 the dynamic symbol table, is considered to be a dynamic reloc
5703 _bfd_elf_canonicalize_dynamic_reloc (bfd
*abfd
,
5707 bfd_boolean (*slurp_relocs
) (bfd
*, asection
*, asymbol
**, bfd_boolean
);
5711 if (elf_dynsymtab (abfd
) == 0)
5713 bfd_set_error (bfd_error_invalid_operation
);
5717 slurp_relocs
= get_elf_backend_data (abfd
)->s
->slurp_reloc_table
;
5719 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
5721 if (elf_section_data (s
)->this_hdr
.sh_link
== elf_dynsymtab (abfd
)
5722 && (elf_section_data (s
)->this_hdr
.sh_type
== SHT_REL
5723 || elf_section_data (s
)->this_hdr
.sh_type
== SHT_RELA
))
5728 if (! (*slurp_relocs
) (abfd
, s
, syms
, TRUE
))
5730 count
= s
->_raw_size
/ elf_section_data (s
)->this_hdr
.sh_entsize
;
5732 for (i
= 0; i
< count
; i
++)
5743 /* Read in the version information. */
5746 _bfd_elf_slurp_version_tables (bfd
*abfd
)
5748 bfd_byte
*contents
= NULL
;
5751 if (elf_dynverdef (abfd
) != 0)
5753 Elf_Internal_Shdr
*hdr
;
5754 Elf_External_Verdef
*everdef
;
5755 Elf_Internal_Verdef
*iverdef
;
5756 Elf_Internal_Verdef
*iverdefarr
;
5757 Elf_Internal_Verdef iverdefmem
;
5759 unsigned int maxidx
;
5761 hdr
= &elf_tdata (abfd
)->dynverdef_hdr
;
5763 contents
= bfd_malloc (hdr
->sh_size
);
5764 if (contents
== NULL
)
5766 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
5767 || bfd_bread (contents
, hdr
->sh_size
, abfd
) != hdr
->sh_size
)
5770 /* We know the number of entries in the section but not the maximum
5771 index. Therefore we have to run through all entries and find
5773 everdef
= (Elf_External_Verdef
*) contents
;
5775 for (i
= 0; i
< hdr
->sh_info
; ++i
)
5777 _bfd_elf_swap_verdef_in (abfd
, everdef
, &iverdefmem
);
5779 if ((iverdefmem
.vd_ndx
& ((unsigned) VERSYM_VERSION
)) > maxidx
)
5780 maxidx
= iverdefmem
.vd_ndx
& ((unsigned) VERSYM_VERSION
);
5782 everdef
= ((Elf_External_Verdef
*)
5783 ((bfd_byte
*) everdef
+ iverdefmem
.vd_next
));
5786 amt
= (bfd_size_type
) maxidx
* sizeof (Elf_Internal_Verdef
);
5787 elf_tdata (abfd
)->verdef
= bfd_zalloc (abfd
, amt
);
5788 if (elf_tdata (abfd
)->verdef
== NULL
)
5791 elf_tdata (abfd
)->cverdefs
= maxidx
;
5793 everdef
= (Elf_External_Verdef
*) contents
;
5794 iverdefarr
= elf_tdata (abfd
)->verdef
;
5795 for (i
= 0; i
< hdr
->sh_info
; i
++)
5797 Elf_External_Verdaux
*everdaux
;
5798 Elf_Internal_Verdaux
*iverdaux
;
5801 _bfd_elf_swap_verdef_in (abfd
, everdef
, &iverdefmem
);
5803 iverdef
= &iverdefarr
[(iverdefmem
.vd_ndx
& VERSYM_VERSION
) - 1];
5804 memcpy (iverdef
, &iverdefmem
, sizeof (Elf_Internal_Verdef
));
5806 iverdef
->vd_bfd
= abfd
;
5808 amt
= (bfd_size_type
) iverdef
->vd_cnt
* sizeof (Elf_Internal_Verdaux
);
5809 iverdef
->vd_auxptr
= bfd_alloc (abfd
, amt
);
5810 if (iverdef
->vd_auxptr
== NULL
)
5813 everdaux
= ((Elf_External_Verdaux
*)
5814 ((bfd_byte
*) everdef
+ iverdef
->vd_aux
));
5815 iverdaux
= iverdef
->vd_auxptr
;
5816 for (j
= 0; j
< iverdef
->vd_cnt
; j
++, iverdaux
++)
5818 _bfd_elf_swap_verdaux_in (abfd
, everdaux
, iverdaux
);
5820 iverdaux
->vda_nodename
=
5821 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
5822 iverdaux
->vda_name
);
5823 if (iverdaux
->vda_nodename
== NULL
)
5826 if (j
+ 1 < iverdef
->vd_cnt
)
5827 iverdaux
->vda_nextptr
= iverdaux
+ 1;
5829 iverdaux
->vda_nextptr
= NULL
;
5831 everdaux
= ((Elf_External_Verdaux
*)
5832 ((bfd_byte
*) everdaux
+ iverdaux
->vda_next
));
5835 iverdef
->vd_nodename
= iverdef
->vd_auxptr
->vda_nodename
;
5837 if (i
+ 1 < hdr
->sh_info
)
5838 iverdef
->vd_nextdef
= iverdef
+ 1;
5840 iverdef
->vd_nextdef
= NULL
;
5842 everdef
= ((Elf_External_Verdef
*)
5843 ((bfd_byte
*) everdef
+ iverdef
->vd_next
));
5850 if (elf_dynverref (abfd
) != 0)
5852 Elf_Internal_Shdr
*hdr
;
5853 Elf_External_Verneed
*everneed
;
5854 Elf_Internal_Verneed
*iverneed
;
5857 hdr
= &elf_tdata (abfd
)->dynverref_hdr
;
5859 amt
= (bfd_size_type
) hdr
->sh_info
* sizeof (Elf_Internal_Verneed
);
5860 elf_tdata (abfd
)->verref
= bfd_zalloc (abfd
, amt
);
5861 if (elf_tdata (abfd
)->verref
== NULL
)
5864 elf_tdata (abfd
)->cverrefs
= hdr
->sh_info
;
5866 contents
= bfd_malloc (hdr
->sh_size
);
5867 if (contents
== NULL
)
5869 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
5870 || bfd_bread (contents
, hdr
->sh_size
, abfd
) != hdr
->sh_size
)
5873 everneed
= (Elf_External_Verneed
*) contents
;
5874 iverneed
= elf_tdata (abfd
)->verref
;
5875 for (i
= 0; i
< hdr
->sh_info
; i
++, iverneed
++)
5877 Elf_External_Vernaux
*evernaux
;
5878 Elf_Internal_Vernaux
*ivernaux
;
5881 _bfd_elf_swap_verneed_in (abfd
, everneed
, iverneed
);
5883 iverneed
->vn_bfd
= abfd
;
5885 iverneed
->vn_filename
=
5886 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
5888 if (iverneed
->vn_filename
== NULL
)
5891 amt
= iverneed
->vn_cnt
;
5892 amt
*= sizeof (Elf_Internal_Vernaux
);
5893 iverneed
->vn_auxptr
= bfd_alloc (abfd
, amt
);
5895 evernaux
= ((Elf_External_Vernaux
*)
5896 ((bfd_byte
*) everneed
+ iverneed
->vn_aux
));
5897 ivernaux
= iverneed
->vn_auxptr
;
5898 for (j
= 0; j
< iverneed
->vn_cnt
; j
++, ivernaux
++)
5900 _bfd_elf_swap_vernaux_in (abfd
, evernaux
, ivernaux
);
5902 ivernaux
->vna_nodename
=
5903 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
5904 ivernaux
->vna_name
);
5905 if (ivernaux
->vna_nodename
== NULL
)
5908 if (j
+ 1 < iverneed
->vn_cnt
)
5909 ivernaux
->vna_nextptr
= ivernaux
+ 1;
5911 ivernaux
->vna_nextptr
= NULL
;
5913 evernaux
= ((Elf_External_Vernaux
*)
5914 ((bfd_byte
*) evernaux
+ ivernaux
->vna_next
));
5917 if (i
+ 1 < hdr
->sh_info
)
5918 iverneed
->vn_nextref
= iverneed
+ 1;
5920 iverneed
->vn_nextref
= NULL
;
5922 everneed
= ((Elf_External_Verneed
*)
5923 ((bfd_byte
*) everneed
+ iverneed
->vn_next
));
5933 if (contents
!= NULL
)
5939 _bfd_elf_make_empty_symbol (bfd
*abfd
)
5941 elf_symbol_type
*newsym
;
5942 bfd_size_type amt
= sizeof (elf_symbol_type
);
5944 newsym
= bfd_zalloc (abfd
, amt
);
5949 newsym
->symbol
.the_bfd
= abfd
;
5950 return &newsym
->symbol
;
5955 _bfd_elf_get_symbol_info (bfd
*abfd ATTRIBUTE_UNUSED
,
5959 bfd_symbol_info (symbol
, ret
);
5962 /* Return whether a symbol name implies a local symbol. Most targets
5963 use this function for the is_local_label_name entry point, but some
5967 _bfd_elf_is_local_label_name (bfd
*abfd ATTRIBUTE_UNUSED
,
5970 /* Normal local symbols start with ``.L''. */
5971 if (name
[0] == '.' && name
[1] == 'L')
5974 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
5975 DWARF debugging symbols starting with ``..''. */
5976 if (name
[0] == '.' && name
[1] == '.')
5979 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
5980 emitting DWARF debugging output. I suspect this is actually a
5981 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
5982 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
5983 underscore to be emitted on some ELF targets). For ease of use,
5984 we treat such symbols as local. */
5985 if (name
[0] == '_' && name
[1] == '.' && name
[2] == 'L' && name
[3] == '_')
5992 _bfd_elf_get_lineno (bfd
*abfd ATTRIBUTE_UNUSED
,
5993 asymbol
*symbol ATTRIBUTE_UNUSED
)
6000 _bfd_elf_set_arch_mach (bfd
*abfd
,
6001 enum bfd_architecture arch
,
6002 unsigned long machine
)
6004 /* If this isn't the right architecture for this backend, and this
6005 isn't the generic backend, fail. */
6006 if (arch
!= get_elf_backend_data (abfd
)->arch
6007 && arch
!= bfd_arch_unknown
6008 && get_elf_backend_data (abfd
)->arch
!= bfd_arch_unknown
)
6011 return bfd_default_set_arch_mach (abfd
, arch
, machine
);
6014 /* Find the function to a particular section and offset,
6015 for error reporting. */
6018 elf_find_function (bfd
*abfd ATTRIBUTE_UNUSED
,
6022 const char **filename_ptr
,
6023 const char **functionname_ptr
)
6025 const char *filename
;
6034 for (p
= symbols
; *p
!= NULL
; p
++)
6038 q
= (elf_symbol_type
*) *p
;
6040 if (bfd_get_section (&q
->symbol
) != section
)
6043 switch (ELF_ST_TYPE (q
->internal_elf_sym
.st_info
))
6048 filename
= bfd_asymbol_name (&q
->symbol
);
6052 if (q
->symbol
.section
== section
6053 && q
->symbol
.value
>= low_func
6054 && q
->symbol
.value
<= offset
)
6056 func
= (asymbol
*) q
;
6057 low_func
= q
->symbol
.value
;
6067 *filename_ptr
= filename
;
6068 if (functionname_ptr
)
6069 *functionname_ptr
= bfd_asymbol_name (func
);
6074 /* Find the nearest line to a particular section and offset,
6075 for error reporting. */
6078 _bfd_elf_find_nearest_line (bfd
*abfd
,
6082 const char **filename_ptr
,
6083 const char **functionname_ptr
,
6084 unsigned int *line_ptr
)
6088 if (_bfd_dwarf1_find_nearest_line (abfd
, section
, symbols
, offset
,
6089 filename_ptr
, functionname_ptr
,
6092 if (!*functionname_ptr
)
6093 elf_find_function (abfd
, section
, symbols
, offset
,
6094 *filename_ptr
? NULL
: filename_ptr
,
6100 if (_bfd_dwarf2_find_nearest_line (abfd
, section
, symbols
, offset
,
6101 filename_ptr
, functionname_ptr
,
6103 &elf_tdata (abfd
)->dwarf2_find_line_info
))
6105 if (!*functionname_ptr
)
6106 elf_find_function (abfd
, section
, symbols
, offset
,
6107 *filename_ptr
? NULL
: filename_ptr
,
6113 if (! _bfd_stab_section_find_nearest_line (abfd
, symbols
, section
, offset
,
6114 &found
, filename_ptr
,
6115 functionname_ptr
, line_ptr
,
6116 &elf_tdata (abfd
)->line_info
))
6118 if (found
&& (*functionname_ptr
|| *line_ptr
))
6121 if (symbols
== NULL
)
6124 if (! elf_find_function (abfd
, section
, symbols
, offset
,
6125 filename_ptr
, functionname_ptr
))
6133 _bfd_elf_sizeof_headers (bfd
*abfd
, bfd_boolean reloc
)
6137 ret
= get_elf_backend_data (abfd
)->s
->sizeof_ehdr
;
6139 ret
+= get_program_header_size (abfd
);
6144 _bfd_elf_set_section_contents (bfd
*abfd
,
6146 const void *location
,
6148 bfd_size_type count
)
6150 Elf_Internal_Shdr
*hdr
;
6153 if (! abfd
->output_has_begun
6154 && ! _bfd_elf_compute_section_file_positions (abfd
, NULL
))
6157 hdr
= &elf_section_data (section
)->this_hdr
;
6158 pos
= hdr
->sh_offset
+ offset
;
6159 if (bfd_seek (abfd
, pos
, SEEK_SET
) != 0
6160 || bfd_bwrite (location
, count
, abfd
) != count
)
6167 _bfd_elf_no_info_to_howto (bfd
*abfd ATTRIBUTE_UNUSED
,
6168 arelent
*cache_ptr ATTRIBUTE_UNUSED
,
6169 Elf_Internal_Rela
*dst ATTRIBUTE_UNUSED
)
6174 /* Try to convert a non-ELF reloc into an ELF one. */
6177 _bfd_elf_validate_reloc (bfd
*abfd
, arelent
*areloc
)
6179 /* Check whether we really have an ELF howto. */
6181 if ((*areloc
->sym_ptr_ptr
)->the_bfd
->xvec
!= abfd
->xvec
)
6183 bfd_reloc_code_real_type code
;
6184 reloc_howto_type
*howto
;
6186 /* Alien reloc: Try to determine its type to replace it with an
6187 equivalent ELF reloc. */
6189 if (areloc
->howto
->pc_relative
)
6191 switch (areloc
->howto
->bitsize
)
6194 code
= BFD_RELOC_8_PCREL
;
6197 code
= BFD_RELOC_12_PCREL
;
6200 code
= BFD_RELOC_16_PCREL
;
6203 code
= BFD_RELOC_24_PCREL
;
6206 code
= BFD_RELOC_32_PCREL
;
6209 code
= BFD_RELOC_64_PCREL
;
6215 howto
= bfd_reloc_type_lookup (abfd
, code
);
6217 if (areloc
->howto
->pcrel_offset
!= howto
->pcrel_offset
)
6219 if (howto
->pcrel_offset
)
6220 areloc
->addend
+= areloc
->address
;
6222 areloc
->addend
-= areloc
->address
; /* addend is unsigned!! */
6227 switch (areloc
->howto
->bitsize
)
6233 code
= BFD_RELOC_14
;
6236 code
= BFD_RELOC_16
;
6239 code
= BFD_RELOC_26
;
6242 code
= BFD_RELOC_32
;
6245 code
= BFD_RELOC_64
;
6251 howto
= bfd_reloc_type_lookup (abfd
, code
);
6255 areloc
->howto
= howto
;
6263 (*_bfd_error_handler
)
6264 (_("%s: unsupported relocation type %s"),
6265 bfd_archive_filename (abfd
), areloc
->howto
->name
);
6266 bfd_set_error (bfd_error_bad_value
);
6271 _bfd_elf_close_and_cleanup (bfd
*abfd
)
6273 if (bfd_get_format (abfd
) == bfd_object
)
6275 if (elf_shstrtab (abfd
) != NULL
)
6276 _bfd_elf_strtab_free (elf_shstrtab (abfd
));
6279 return _bfd_generic_close_and_cleanup (abfd
);
6282 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
6283 in the relocation's offset. Thus we cannot allow any sort of sanity
6284 range-checking to interfere. There is nothing else to do in processing
6287 bfd_reloc_status_type
6288 _bfd_elf_rel_vtable_reloc_fn
6289 (bfd
*abfd ATTRIBUTE_UNUSED
, arelent
*re ATTRIBUTE_UNUSED
,
6290 struct bfd_symbol
*symbol ATTRIBUTE_UNUSED
,
6291 void *data ATTRIBUTE_UNUSED
, asection
*is ATTRIBUTE_UNUSED
,
6292 bfd
*obfd ATTRIBUTE_UNUSED
, char **errmsg ATTRIBUTE_UNUSED
)
6294 return bfd_reloc_ok
;
6297 /* Elf core file support. Much of this only works on native
6298 toolchains, since we rely on knowing the
6299 machine-dependent procfs structure in order to pick
6300 out details about the corefile. */
6302 #ifdef HAVE_SYS_PROCFS_H
6303 # include <sys/procfs.h>
6306 /* FIXME: this is kinda wrong, but it's what gdb wants. */
6309 elfcore_make_pid (bfd
*abfd
)
6311 return ((elf_tdata (abfd
)->core_lwpid
<< 16)
6312 + (elf_tdata (abfd
)->core_pid
));
6315 /* If there isn't a section called NAME, make one, using
6316 data from SECT. Note, this function will generate a
6317 reference to NAME, so you shouldn't deallocate or
6321 elfcore_maybe_make_sect (bfd
*abfd
, char *name
, asection
*sect
)
6325 if (bfd_get_section_by_name (abfd
, name
) != NULL
)
6328 sect2
= bfd_make_section (abfd
, name
);
6332 sect2
->_raw_size
= sect
->_raw_size
;
6333 sect2
->filepos
= sect
->filepos
;
6334 sect2
->flags
= sect
->flags
;
6335 sect2
->alignment_power
= sect
->alignment_power
;
6339 /* Create a pseudosection containing SIZE bytes at FILEPOS. This
6340 actually creates up to two pseudosections:
6341 - For the single-threaded case, a section named NAME, unless
6342 such a section already exists.
6343 - For the multi-threaded case, a section named "NAME/PID", where
6344 PID is elfcore_make_pid (abfd).
6345 Both pseudosections have identical contents. */
6347 _bfd_elfcore_make_pseudosection (bfd
*abfd
,
6353 char *threaded_name
;
6357 /* Build the section name. */
6359 sprintf (buf
, "%s/%d", name
, elfcore_make_pid (abfd
));
6360 len
= strlen (buf
) + 1;
6361 threaded_name
= bfd_alloc (abfd
, len
);
6362 if (threaded_name
== NULL
)
6364 memcpy (threaded_name
, buf
, len
);
6366 sect
= bfd_make_section_anyway (abfd
, threaded_name
);
6369 sect
->_raw_size
= size
;
6370 sect
->filepos
= filepos
;
6371 sect
->flags
= SEC_HAS_CONTENTS
;
6372 sect
->alignment_power
= 2;
6374 return elfcore_maybe_make_sect (abfd
, name
, sect
);
6377 /* prstatus_t exists on:
6379 linux 2.[01] + glibc
6383 #if defined (HAVE_PRSTATUS_T)
6386 elfcore_grok_prstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
6391 if (note
->descsz
== sizeof (prstatus_t
))
6395 raw_size
= sizeof (prstat
.pr_reg
);
6396 offset
= offsetof (prstatus_t
, pr_reg
);
6397 memcpy (&prstat
, note
->descdata
, sizeof (prstat
));
6399 /* Do not overwrite the core signal if it
6400 has already been set by another thread. */
6401 if (elf_tdata (abfd
)->core_signal
== 0)
6402 elf_tdata (abfd
)->core_signal
= prstat
.pr_cursig
;
6403 elf_tdata (abfd
)->core_pid
= prstat
.pr_pid
;
6405 /* pr_who exists on:
6408 pr_who doesn't exist on:
6411 #if defined (HAVE_PRSTATUS_T_PR_WHO)
6412 elf_tdata (abfd
)->core_lwpid
= prstat
.pr_who
;
6415 #if defined (HAVE_PRSTATUS32_T)
6416 else if (note
->descsz
== sizeof (prstatus32_t
))
6418 /* 64-bit host, 32-bit corefile */
6419 prstatus32_t prstat
;
6421 raw_size
= sizeof (prstat
.pr_reg
);
6422 offset
= offsetof (prstatus32_t
, pr_reg
);
6423 memcpy (&prstat
, note
->descdata
, sizeof (prstat
));
6425 /* Do not overwrite the core signal if it
6426 has already been set by another thread. */
6427 if (elf_tdata (abfd
)->core_signal
== 0)
6428 elf_tdata (abfd
)->core_signal
= prstat
.pr_cursig
;
6429 elf_tdata (abfd
)->core_pid
= prstat
.pr_pid
;
6431 /* pr_who exists on:
6434 pr_who doesn't exist on:
6437 #if defined (HAVE_PRSTATUS32_T_PR_WHO)
6438 elf_tdata (abfd
)->core_lwpid
= prstat
.pr_who
;
6441 #endif /* HAVE_PRSTATUS32_T */
6444 /* Fail - we don't know how to handle any other
6445 note size (ie. data object type). */
6449 /* Make a ".reg/999" section and a ".reg" section. */
6450 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
6451 raw_size
, note
->descpos
+ offset
);
6453 #endif /* defined (HAVE_PRSTATUS_T) */
6455 /* Create a pseudosection containing the exact contents of NOTE. */
6457 elfcore_make_note_pseudosection (bfd
*abfd
,
6459 Elf_Internal_Note
*note
)
6461 return _bfd_elfcore_make_pseudosection (abfd
, name
,
6462 note
->descsz
, note
->descpos
);
6465 /* There isn't a consistent prfpregset_t across platforms,
6466 but it doesn't matter, because we don't have to pick this
6467 data structure apart. */
6470 elfcore_grok_prfpreg (bfd
*abfd
, Elf_Internal_Note
*note
)
6472 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
6475 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
6476 type of 5 (NT_PRXFPREG). Just include the whole note's contents
6480 elfcore_grok_prxfpreg (bfd
*abfd
, Elf_Internal_Note
*note
)
6482 return elfcore_make_note_pseudosection (abfd
, ".reg-xfp", note
);
6485 #if defined (HAVE_PRPSINFO_T)
6486 typedef prpsinfo_t elfcore_psinfo_t
;
6487 #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
6488 typedef prpsinfo32_t elfcore_psinfo32_t
;
6492 #if defined (HAVE_PSINFO_T)
6493 typedef psinfo_t elfcore_psinfo_t
;
6494 #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
6495 typedef psinfo32_t elfcore_psinfo32_t
;
6499 /* return a malloc'ed copy of a string at START which is at
6500 most MAX bytes long, possibly without a terminating '\0'.
6501 the copy will always have a terminating '\0'. */
6504 _bfd_elfcore_strndup (bfd
*abfd
, char *start
, size_t max
)
6507 char *end
= memchr (start
, '\0', max
);
6515 dups
= bfd_alloc (abfd
, len
+ 1);
6519 memcpy (dups
, start
, len
);
6525 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
6527 elfcore_grok_psinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
6529 if (note
->descsz
== sizeof (elfcore_psinfo_t
))
6531 elfcore_psinfo_t psinfo
;
6533 memcpy (&psinfo
, note
->descdata
, sizeof (psinfo
));
6535 elf_tdata (abfd
)->core_program
6536 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_fname
,
6537 sizeof (psinfo
.pr_fname
));
6539 elf_tdata (abfd
)->core_command
6540 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_psargs
,
6541 sizeof (psinfo
.pr_psargs
));
6543 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
6544 else if (note
->descsz
== sizeof (elfcore_psinfo32_t
))
6546 /* 64-bit host, 32-bit corefile */
6547 elfcore_psinfo32_t psinfo
;
6549 memcpy (&psinfo
, note
->descdata
, sizeof (psinfo
));
6551 elf_tdata (abfd
)->core_program
6552 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_fname
,
6553 sizeof (psinfo
.pr_fname
));
6555 elf_tdata (abfd
)->core_command
6556 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_psargs
,
6557 sizeof (psinfo
.pr_psargs
));
6563 /* Fail - we don't know how to handle any other
6564 note size (ie. data object type). */
6568 /* Note that for some reason, a spurious space is tacked
6569 onto the end of the args in some (at least one anyway)
6570 implementations, so strip it off if it exists. */
6573 char *command
= elf_tdata (abfd
)->core_command
;
6574 int n
= strlen (command
);
6576 if (0 < n
&& command
[n
- 1] == ' ')
6577 command
[n
- 1] = '\0';
6582 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
6584 #if defined (HAVE_PSTATUS_T)
6586 elfcore_grok_pstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
6588 if (note
->descsz
== sizeof (pstatus_t
)
6589 #if defined (HAVE_PXSTATUS_T)
6590 || note
->descsz
== sizeof (pxstatus_t
)
6596 memcpy (&pstat
, note
->descdata
, sizeof (pstat
));
6598 elf_tdata (abfd
)->core_pid
= pstat
.pr_pid
;
6600 #if defined (HAVE_PSTATUS32_T)
6601 else if (note
->descsz
== sizeof (pstatus32_t
))
6603 /* 64-bit host, 32-bit corefile */
6606 memcpy (&pstat
, note
->descdata
, sizeof (pstat
));
6608 elf_tdata (abfd
)->core_pid
= pstat
.pr_pid
;
6611 /* Could grab some more details from the "representative"
6612 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
6613 NT_LWPSTATUS note, presumably. */
6617 #endif /* defined (HAVE_PSTATUS_T) */
6619 #if defined (HAVE_LWPSTATUS_T)
6621 elfcore_grok_lwpstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
6623 lwpstatus_t lwpstat
;
6629 if (note
->descsz
!= sizeof (lwpstat
)
6630 #if defined (HAVE_LWPXSTATUS_T)
6631 && note
->descsz
!= sizeof (lwpxstatus_t
)
6636 memcpy (&lwpstat
, note
->descdata
, sizeof (lwpstat
));
6638 elf_tdata (abfd
)->core_lwpid
= lwpstat
.pr_lwpid
;
6639 elf_tdata (abfd
)->core_signal
= lwpstat
.pr_cursig
;
6641 /* Make a ".reg/999" section. */
6643 sprintf (buf
, ".reg/%d", elfcore_make_pid (abfd
));
6644 len
= strlen (buf
) + 1;
6645 name
= bfd_alloc (abfd
, len
);
6648 memcpy (name
, buf
, len
);
6650 sect
= bfd_make_section_anyway (abfd
, name
);
6654 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
6655 sect
->_raw_size
= sizeof (lwpstat
.pr_context
.uc_mcontext
.gregs
);
6656 sect
->filepos
= note
->descpos
6657 + offsetof (lwpstatus_t
, pr_context
.uc_mcontext
.gregs
);
6660 #if defined (HAVE_LWPSTATUS_T_PR_REG)
6661 sect
->_raw_size
= sizeof (lwpstat
.pr_reg
);
6662 sect
->filepos
= note
->descpos
+ offsetof (lwpstatus_t
, pr_reg
);
6665 sect
->flags
= SEC_HAS_CONTENTS
;
6666 sect
->alignment_power
= 2;
6668 if (!elfcore_maybe_make_sect (abfd
, ".reg", sect
))
6671 /* Make a ".reg2/999" section */
6673 sprintf (buf
, ".reg2/%d", elfcore_make_pid (abfd
));
6674 len
= strlen (buf
) + 1;
6675 name
= bfd_alloc (abfd
, len
);
6678 memcpy (name
, buf
, len
);
6680 sect
= bfd_make_section_anyway (abfd
, name
);
6684 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
6685 sect
->_raw_size
= sizeof (lwpstat
.pr_context
.uc_mcontext
.fpregs
);
6686 sect
->filepos
= note
->descpos
6687 + offsetof (lwpstatus_t
, pr_context
.uc_mcontext
.fpregs
);
6690 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
6691 sect
->_raw_size
= sizeof (lwpstat
.pr_fpreg
);
6692 sect
->filepos
= note
->descpos
+ offsetof (lwpstatus_t
, pr_fpreg
);
6695 sect
->flags
= SEC_HAS_CONTENTS
;
6696 sect
->alignment_power
= 2;
6698 return elfcore_maybe_make_sect (abfd
, ".reg2", sect
);
6700 #endif /* defined (HAVE_LWPSTATUS_T) */
6702 #if defined (HAVE_WIN32_PSTATUS_T)
6704 elfcore_grok_win32pstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
6710 win32_pstatus_t pstatus
;
6712 if (note
->descsz
< sizeof (pstatus
))
6715 memcpy (&pstatus
, note
->descdata
, sizeof (pstatus
));
6717 switch (pstatus
.data_type
)
6719 case NOTE_INFO_PROCESS
:
6720 /* FIXME: need to add ->core_command. */
6721 elf_tdata (abfd
)->core_signal
= pstatus
.data
.process_info
.signal
;
6722 elf_tdata (abfd
)->core_pid
= pstatus
.data
.process_info
.pid
;
6725 case NOTE_INFO_THREAD
:
6726 /* Make a ".reg/999" section. */
6727 sprintf (buf
, ".reg/%d", pstatus
.data
.thread_info
.tid
);
6729 len
= strlen (buf
) + 1;
6730 name
= bfd_alloc (abfd
, len
);
6734 memcpy (name
, buf
, len
);
6736 sect
= bfd_make_section_anyway (abfd
, name
);
6740 sect
->_raw_size
= sizeof (pstatus
.data
.thread_info
.thread_context
);
6741 sect
->filepos
= (note
->descpos
6742 + offsetof (struct win32_pstatus
,
6743 data
.thread_info
.thread_context
));
6744 sect
->flags
= SEC_HAS_CONTENTS
;
6745 sect
->alignment_power
= 2;
6747 if (pstatus
.data
.thread_info
.is_active_thread
)
6748 if (! elfcore_maybe_make_sect (abfd
, ".reg", sect
))
6752 case NOTE_INFO_MODULE
:
6753 /* Make a ".module/xxxxxxxx" section. */
6754 sprintf (buf
, ".module/%08x", pstatus
.data
.module_info
.base_address
);
6756 len
= strlen (buf
) + 1;
6757 name
= bfd_alloc (abfd
, len
);
6761 memcpy (name
, buf
, len
);
6763 sect
= bfd_make_section_anyway (abfd
, name
);
6768 sect
->_raw_size
= note
->descsz
;
6769 sect
->filepos
= note
->descpos
;
6770 sect
->flags
= SEC_HAS_CONTENTS
;
6771 sect
->alignment_power
= 2;
6780 #endif /* HAVE_WIN32_PSTATUS_T */
6783 elfcore_grok_note (bfd
*abfd
, Elf_Internal_Note
*note
)
6785 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
6793 if (bed
->elf_backend_grok_prstatus
)
6794 if ((*bed
->elf_backend_grok_prstatus
) (abfd
, note
))
6796 #if defined (HAVE_PRSTATUS_T)
6797 return elfcore_grok_prstatus (abfd
, note
);
6802 #if defined (HAVE_PSTATUS_T)
6804 return elfcore_grok_pstatus (abfd
, note
);
6807 #if defined (HAVE_LWPSTATUS_T)
6809 return elfcore_grok_lwpstatus (abfd
, note
);
6812 case NT_FPREGSET
: /* FIXME: rename to NT_PRFPREG */
6813 return elfcore_grok_prfpreg (abfd
, note
);
6815 #if defined (HAVE_WIN32_PSTATUS_T)
6816 case NT_WIN32PSTATUS
:
6817 return elfcore_grok_win32pstatus (abfd
, note
);
6820 case NT_PRXFPREG
: /* Linux SSE extension */
6821 if (note
->namesz
== 6
6822 && strcmp (note
->namedata
, "LINUX") == 0)
6823 return elfcore_grok_prxfpreg (abfd
, note
);
6829 if (bed
->elf_backend_grok_psinfo
)
6830 if ((*bed
->elf_backend_grok_psinfo
) (abfd
, note
))
6832 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
6833 return elfcore_grok_psinfo (abfd
, note
);
6840 asection
*sect
= bfd_make_section_anyway (abfd
, ".auxv");
6844 sect
->_raw_size
= note
->descsz
;
6845 sect
->filepos
= note
->descpos
;
6846 sect
->flags
= SEC_HAS_CONTENTS
;
6847 sect
->alignment_power
= 1 + bfd_get_arch_size (abfd
) / 32;
6855 elfcore_netbsd_get_lwpid (Elf_Internal_Note
*note
, int *lwpidp
)
6859 cp
= strchr (note
->namedata
, '@');
6862 *lwpidp
= atoi(cp
+ 1);
6869 elfcore_grok_netbsd_procinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
6872 /* Signal number at offset 0x08. */
6873 elf_tdata (abfd
)->core_signal
6874 = bfd_h_get_32 (abfd
, (bfd_byte
*) note
->descdata
+ 0x08);
6876 /* Process ID at offset 0x50. */
6877 elf_tdata (abfd
)->core_pid
6878 = bfd_h_get_32 (abfd
, (bfd_byte
*) note
->descdata
+ 0x50);
6880 /* Command name at 0x7c (max 32 bytes, including nul). */
6881 elf_tdata (abfd
)->core_command
6882 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 0x7c, 31);
6884 return elfcore_make_note_pseudosection (abfd
, ".note.netbsdcore.procinfo",
6889 elfcore_grok_netbsd_note (bfd
*abfd
, Elf_Internal_Note
*note
)
6893 if (elfcore_netbsd_get_lwpid (note
, &lwp
))
6894 elf_tdata (abfd
)->core_lwpid
= lwp
;
6896 if (note
->type
== NT_NETBSDCORE_PROCINFO
)
6898 /* NetBSD-specific core "procinfo". Note that we expect to
6899 find this note before any of the others, which is fine,
6900 since the kernel writes this note out first when it
6901 creates a core file. */
6903 return elfcore_grok_netbsd_procinfo (abfd
, note
);
6906 /* As of Jan 2002 there are no other machine-independent notes
6907 defined for NetBSD core files. If the note type is less
6908 than the start of the machine-dependent note types, we don't
6911 if (note
->type
< NT_NETBSDCORE_FIRSTMACH
)
6915 switch (bfd_get_arch (abfd
))
6917 /* On the Alpha, SPARC (32-bit and 64-bit), PT_GETREGS == mach+0 and
6918 PT_GETFPREGS == mach+2. */
6920 case bfd_arch_alpha
:
6921 case bfd_arch_sparc
:
6924 case NT_NETBSDCORE_FIRSTMACH
+0:
6925 return elfcore_make_note_pseudosection (abfd
, ".reg", note
);
6927 case NT_NETBSDCORE_FIRSTMACH
+2:
6928 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
6934 /* On all other arch's, PT_GETREGS == mach+1 and
6935 PT_GETFPREGS == mach+3. */
6940 case NT_NETBSDCORE_FIRSTMACH
+1:
6941 return elfcore_make_note_pseudosection (abfd
, ".reg", note
);
6943 case NT_NETBSDCORE_FIRSTMACH
+3:
6944 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
6954 elfcore_grok_nto_status (bfd
*abfd
, Elf_Internal_Note
*note
, pid_t
*tid
)
6956 void *ddata
= note
->descdata
;
6963 /* nto_procfs_status 'pid' field is at offset 0. */
6964 elf_tdata (abfd
)->core_pid
= bfd_get_32 (abfd
, (bfd_byte
*) ddata
);
6966 /* nto_procfs_status 'tid' field is at offset 4. Pass it back. */
6967 *tid
= bfd_get_32 (abfd
, (bfd_byte
*) ddata
+ 4);
6969 /* nto_procfs_status 'flags' field is at offset 8. */
6970 flags
= bfd_get_32 (abfd
, (bfd_byte
*) ddata
+ 8);
6972 /* nto_procfs_status 'what' field is at offset 14. */
6973 if ((sig
= bfd_get_16 (abfd
, (bfd_byte
*) ddata
+ 14)) > 0)
6975 elf_tdata (abfd
)->core_signal
= sig
;
6976 elf_tdata (abfd
)->core_lwpid
= *tid
;
6979 /* _DEBUG_FLAG_CURTID (current thread) is 0x80. Some cores
6980 do not come from signals so we make sure we set the current
6981 thread just in case. */
6982 if (flags
& 0x00000080)
6983 elf_tdata (abfd
)->core_lwpid
= *tid
;
6985 /* Make a ".qnx_core_status/%d" section. */
6986 sprintf (buf
, ".qnx_core_status/%d", *tid
);
6988 name
= bfd_alloc (abfd
, strlen (buf
) + 1);
6993 sect
= bfd_make_section_anyway (abfd
, name
);
6997 sect
->_raw_size
= note
->descsz
;
6998 sect
->filepos
= note
->descpos
;
6999 sect
->flags
= SEC_HAS_CONTENTS
;
7000 sect
->alignment_power
= 2;
7002 return (elfcore_maybe_make_sect (abfd
, ".qnx_core_status", sect
));
7006 elfcore_grok_nto_gregs (bfd
*abfd
, Elf_Internal_Note
*note
, pid_t tid
)
7012 /* Make a ".reg/%d" section. */
7013 sprintf (buf
, ".reg/%d", tid
);
7015 name
= bfd_alloc (abfd
, strlen (buf
) + 1);
7020 sect
= bfd_make_section_anyway (abfd
, name
);
7024 sect
->_raw_size
= note
->descsz
;
7025 sect
->filepos
= note
->descpos
;
7026 sect
->flags
= SEC_HAS_CONTENTS
;
7027 sect
->alignment_power
= 2;
7029 /* This is the current thread. */
7030 if (elf_tdata (abfd
)->core_lwpid
== tid
)
7031 return elfcore_maybe_make_sect (abfd
, ".reg", sect
);
7036 #define BFD_QNT_CORE_INFO 7
7037 #define BFD_QNT_CORE_STATUS 8
7038 #define BFD_QNT_CORE_GREG 9
7039 #define BFD_QNT_CORE_FPREG 10
7042 elfcore_grok_nto_note (bfd
*abfd
, Elf_Internal_Note
*note
)
7044 /* Every GREG section has a STATUS section before it. Store the
7045 tid from the previous call to pass down to the next gregs
7047 static pid_t tid
= 1;
7051 case BFD_QNT_CORE_INFO
: return elfcore_make_note_pseudosection (abfd
, ".qnx_core_info", note
);
7052 case BFD_QNT_CORE_STATUS
: return elfcore_grok_nto_status (abfd
, note
, &tid
);
7053 case BFD_QNT_CORE_GREG
: return elfcore_grok_nto_gregs (abfd
, note
, tid
);
7054 case BFD_QNT_CORE_FPREG
: return elfcore_grok_prfpreg (abfd
, note
);
7055 default: return TRUE
;
7059 /* Function: elfcore_write_note
7066 size of data for note
7069 End of buffer containing note. */
7072 elfcore_write_note (bfd
*abfd
,
7080 Elf_External_Note
*xnp
;
7090 const struct elf_backend_data
*bed
;
7092 namesz
= strlen (name
) + 1;
7093 bed
= get_elf_backend_data (abfd
);
7094 pad
= -namesz
& ((1 << bed
->s
->log_file_align
) - 1);
7097 newspace
= 12 + namesz
+ pad
+ size
;
7099 p
= realloc (buf
, *bufsiz
+ newspace
);
7101 *bufsiz
+= newspace
;
7102 xnp
= (Elf_External_Note
*) dest
;
7103 H_PUT_32 (abfd
, namesz
, xnp
->namesz
);
7104 H_PUT_32 (abfd
, size
, xnp
->descsz
);
7105 H_PUT_32 (abfd
, type
, xnp
->type
);
7109 memcpy (dest
, name
, namesz
);
7117 memcpy (dest
, input
, size
);
7121 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7123 elfcore_write_prpsinfo (bfd
*abfd
,
7130 char *note_name
= "CORE";
7132 #if defined (HAVE_PSINFO_T)
7134 note_type
= NT_PSINFO
;
7137 note_type
= NT_PRPSINFO
;
7140 memset (&data
, 0, sizeof (data
));
7141 strncpy (data
.pr_fname
, fname
, sizeof (data
.pr_fname
));
7142 strncpy (data
.pr_psargs
, psargs
, sizeof (data
.pr_psargs
));
7143 return elfcore_write_note (abfd
, buf
, bufsiz
,
7144 note_name
, note_type
, &data
, sizeof (data
));
7146 #endif /* PSINFO_T or PRPSINFO_T */
7148 #if defined (HAVE_PRSTATUS_T)
7150 elfcore_write_prstatus (bfd
*abfd
,
7158 char *note_name
= "CORE";
7160 memset (&prstat
, 0, sizeof (prstat
));
7161 prstat
.pr_pid
= pid
;
7162 prstat
.pr_cursig
= cursig
;
7163 memcpy (&prstat
.pr_reg
, gregs
, sizeof (prstat
.pr_reg
));
7164 return elfcore_write_note (abfd
, buf
, bufsiz
,
7165 note_name
, NT_PRSTATUS
, &prstat
, sizeof (prstat
));
7167 #endif /* HAVE_PRSTATUS_T */
7169 #if defined (HAVE_LWPSTATUS_T)
7171 elfcore_write_lwpstatus (bfd
*abfd
,
7178 lwpstatus_t lwpstat
;
7179 char *note_name
= "CORE";
7181 memset (&lwpstat
, 0, sizeof (lwpstat
));
7182 lwpstat
.pr_lwpid
= pid
>> 16;
7183 lwpstat
.pr_cursig
= cursig
;
7184 #if defined (HAVE_LWPSTATUS_T_PR_REG)
7185 memcpy (lwpstat
.pr_reg
, gregs
, sizeof (lwpstat
.pr_reg
));
7186 #elif defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7188 memcpy (lwpstat
.pr_context
.uc_mcontext
.gregs
,
7189 gregs
, sizeof (lwpstat
.pr_context
.uc_mcontext
.gregs
));
7191 memcpy (lwpstat
.pr_context
.uc_mcontext
.__gregs
,
7192 gregs
, sizeof (lwpstat
.pr_context
.uc_mcontext
.__gregs
));
7195 return elfcore_write_note (abfd
, buf
, bufsiz
, note_name
,
7196 NT_LWPSTATUS
, &lwpstat
, sizeof (lwpstat
));
7198 #endif /* HAVE_LWPSTATUS_T */
7200 #if defined (HAVE_PSTATUS_T)
7202 elfcore_write_pstatus (bfd
*abfd
,
7210 char *note_name
= "CORE";
7212 memset (&pstat
, 0, sizeof (pstat
));
7213 pstat
.pr_pid
= pid
& 0xffff;
7214 buf
= elfcore_write_note (abfd
, buf
, bufsiz
, note_name
,
7215 NT_PSTATUS
, &pstat
, sizeof (pstat
));
7218 #endif /* HAVE_PSTATUS_T */
7221 elfcore_write_prfpreg (bfd
*abfd
,
7227 char *note_name
= "CORE";
7228 return elfcore_write_note (abfd
, buf
, bufsiz
,
7229 note_name
, NT_FPREGSET
, fpregs
, size
);
7233 elfcore_write_prxfpreg (bfd
*abfd
,
7236 const void *xfpregs
,
7239 char *note_name
= "LINUX";
7240 return elfcore_write_note (abfd
, buf
, bufsiz
,
7241 note_name
, NT_PRXFPREG
, xfpregs
, size
);
7245 elfcore_read_notes (bfd
*abfd
, file_ptr offset
, bfd_size_type size
)
7253 if (bfd_seek (abfd
, offset
, SEEK_SET
) != 0)
7256 buf
= bfd_malloc (size
);
7260 if (bfd_bread (buf
, size
, abfd
) != size
)
7268 while (p
< buf
+ size
)
7270 /* FIXME: bad alignment assumption. */
7271 Elf_External_Note
*xnp
= (Elf_External_Note
*) p
;
7272 Elf_Internal_Note in
;
7274 in
.type
= H_GET_32 (abfd
, xnp
->type
);
7276 in
.namesz
= H_GET_32 (abfd
, xnp
->namesz
);
7277 in
.namedata
= xnp
->name
;
7279 in
.descsz
= H_GET_32 (abfd
, xnp
->descsz
);
7280 in
.descdata
= in
.namedata
+ BFD_ALIGN (in
.namesz
, 4);
7281 in
.descpos
= offset
+ (in
.descdata
- buf
);
7283 if (strncmp (in
.namedata
, "NetBSD-CORE", 11) == 0)
7285 if (! elfcore_grok_netbsd_note (abfd
, &in
))
7288 else if (strncmp (in
.namedata
, "QNX", 3) == 0)
7290 if (! elfcore_grok_nto_note (abfd
, &in
))
7295 if (! elfcore_grok_note (abfd
, &in
))
7299 p
= in
.descdata
+ BFD_ALIGN (in
.descsz
, 4);
7306 /* Providing external access to the ELF program header table. */
7308 /* Return an upper bound on the number of bytes required to store a
7309 copy of ABFD's program header table entries. Return -1 if an error
7310 occurs; bfd_get_error will return an appropriate code. */
7313 bfd_get_elf_phdr_upper_bound (bfd
*abfd
)
7315 if (abfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
7317 bfd_set_error (bfd_error_wrong_format
);
7321 return elf_elfheader (abfd
)->e_phnum
* sizeof (Elf_Internal_Phdr
);
7324 /* Copy ABFD's program header table entries to *PHDRS. The entries
7325 will be stored as an array of Elf_Internal_Phdr structures, as
7326 defined in include/elf/internal.h. To find out how large the
7327 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
7329 Return the number of program header table entries read, or -1 if an
7330 error occurs; bfd_get_error will return an appropriate code. */
7333 bfd_get_elf_phdrs (bfd
*abfd
, void *phdrs
)
7337 if (abfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
7339 bfd_set_error (bfd_error_wrong_format
);
7343 num_phdrs
= elf_elfheader (abfd
)->e_phnum
;
7344 memcpy (phdrs
, elf_tdata (abfd
)->phdr
,
7345 num_phdrs
* sizeof (Elf_Internal_Phdr
));
7351 _bfd_elf_sprintf_vma (bfd
*abfd ATTRIBUTE_UNUSED
, char *buf
, bfd_vma value
)
7354 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
7356 i_ehdrp
= elf_elfheader (abfd
);
7357 if (i_ehdrp
== NULL
)
7358 sprintf_vma (buf
, value
);
7361 if (i_ehdrp
->e_ident
[EI_CLASS
] == ELFCLASS64
)
7363 #if BFD_HOST_64BIT_LONG
7364 sprintf (buf
, "%016lx", value
);
7366 sprintf (buf
, "%08lx%08lx", _bfd_int64_high (value
),
7367 _bfd_int64_low (value
));
7371 sprintf (buf
, "%08lx", (unsigned long) (value
& 0xffffffff));
7374 sprintf_vma (buf
, value
);
7379 _bfd_elf_fprintf_vma (bfd
*abfd ATTRIBUTE_UNUSED
, void *stream
, bfd_vma value
)
7382 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
7384 i_ehdrp
= elf_elfheader (abfd
);
7385 if (i_ehdrp
== NULL
)
7386 fprintf_vma ((FILE *) stream
, value
);
7389 if (i_ehdrp
->e_ident
[EI_CLASS
] == ELFCLASS64
)
7391 #if BFD_HOST_64BIT_LONG
7392 fprintf ((FILE *) stream
, "%016lx", value
);
7394 fprintf ((FILE *) stream
, "%08lx%08lx",
7395 _bfd_int64_high (value
), _bfd_int64_low (value
));
7399 fprintf ((FILE *) stream
, "%08lx",
7400 (unsigned long) (value
& 0xffffffff));
7403 fprintf_vma ((FILE *) stream
, value
);
7407 enum elf_reloc_type_class
7408 _bfd_elf_reloc_type_class (const Elf_Internal_Rela
*rela ATTRIBUTE_UNUSED
)
7410 return reloc_class_normal
;
7413 /* For RELA architectures, return the relocation value for a
7414 relocation against a local symbol. */
7417 _bfd_elf_rela_local_sym (bfd
*abfd
,
7418 Elf_Internal_Sym
*sym
,
7420 Elf_Internal_Rela
*rel
)
7422 asection
*sec
= *psec
;
7425 relocation
= (sec
->output_section
->vma
7426 + sec
->output_offset
7428 if ((sec
->flags
& SEC_MERGE
)
7429 && ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
7430 && sec
->sec_info_type
== ELF_INFO_TYPE_MERGE
)
7433 _bfd_merged_section_offset (abfd
, psec
,
7434 elf_section_data (sec
)->sec_info
,
7435 sym
->st_value
+ rel
->r_addend
,
7438 rel
->r_addend
-= relocation
;
7439 rel
->r_addend
+= sec
->output_section
->vma
+ sec
->output_offset
;
7445 _bfd_elf_rel_local_sym (bfd
*abfd
,
7446 Elf_Internal_Sym
*sym
,
7450 asection
*sec
= *psec
;
7452 if (sec
->sec_info_type
!= ELF_INFO_TYPE_MERGE
)
7453 return sym
->st_value
+ addend
;
7455 return _bfd_merged_section_offset (abfd
, psec
,
7456 elf_section_data (sec
)->sec_info
,
7457 sym
->st_value
+ addend
, 0);
7461 _bfd_elf_section_offset (bfd
*abfd
,
7462 struct bfd_link_info
*info
,
7466 struct bfd_elf_section_data
*sec_data
;
7468 sec_data
= elf_section_data (sec
);
7469 switch (sec
->sec_info_type
)
7471 case ELF_INFO_TYPE_STABS
:
7472 return _bfd_stab_section_offset (abfd
,
7473 &elf_hash_table (info
)->merge_info
,
7474 sec
, &sec_data
->sec_info
, offset
);
7475 case ELF_INFO_TYPE_EH_FRAME
:
7476 return _bfd_elf_eh_frame_section_offset (abfd
, sec
, offset
);
7482 /* Create a new BFD as if by bfd_openr. Rather than opening a file,
7483 reconstruct an ELF file by reading the segments out of remote memory
7484 based on the ELF file header at EHDR_VMA and the ELF program headers it
7485 points to. If not null, *LOADBASEP is filled in with the difference
7486 between the VMAs from which the segments were read, and the VMAs the
7487 file headers (and hence BFD's idea of each section's VMA) put them at.
7489 The function TARGET_READ_MEMORY is called to copy LEN bytes from the
7490 remote memory at target address VMA into the local buffer at MYADDR; it
7491 should return zero on success or an `errno' code on failure. TEMPL must
7492 be a BFD for an ELF target with the word size and byte order found in
7493 the remote memory. */
7496 bfd_elf_bfd_from_remote_memory
7500 int (*target_read_memory
) (bfd_vma
, char *, int))
7502 return (*get_elf_backend_data (templ
)->elf_backend_bfd_from_remote_memory
)
7503 (templ
, ehdr_vma
, loadbasep
, target_read_memory
);