1 /* ELF executable support for BFD.
2 Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002
3 Free Software Foundation, Inc.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
25 BFD support for ELF formats is being worked on.
26 Currently, the best supported back ends are for sparc and i386
27 (running svr4 or Solaris 2).
29 Documentation of the internals of the support code still needs
30 to be written. The code is changing quickly enough that we
31 haven't bothered yet. */
33 /* For sparc64-cross-sparc32. */
41 #include "libiberty.h"
43 static INLINE
struct elf_segment_map
*make_mapping
44 PARAMS ((bfd
*, asection
**, unsigned int, unsigned int, boolean
));
45 static boolean map_sections_to_segments
PARAMS ((bfd
*));
46 static int elf_sort_sections
PARAMS ((const PTR
, const PTR
));
47 static boolean assign_file_positions_for_segments
PARAMS ((bfd
*));
48 static boolean assign_file_positions_except_relocs
PARAMS ((bfd
*));
49 static boolean prep_headers
PARAMS ((bfd
*));
50 static boolean swap_out_syms
PARAMS ((bfd
*, struct bfd_strtab_hash
**, int));
51 static boolean copy_private_bfd_data
PARAMS ((bfd
*, bfd
*));
52 static char *elf_read
PARAMS ((bfd
*, file_ptr
, bfd_size_type
));
53 static const char *group_signature
PARAMS ((bfd
*, Elf_Internal_Shdr
*));
54 static boolean setup_group
PARAMS ((bfd
*, Elf_Internal_Shdr
*, asection
*));
55 static void merge_sections_remove_hook
PARAMS ((bfd
*, asection
*));
56 static void elf_fake_sections
PARAMS ((bfd
*, asection
*, PTR
));
57 static boolean assign_section_numbers
PARAMS ((bfd
*));
58 static INLINE
int sym_is_global
PARAMS ((bfd
*, asymbol
*));
59 static boolean elf_map_symbols
PARAMS ((bfd
*));
60 static bfd_size_type get_program_header_size
PARAMS ((bfd
*));
61 static boolean elfcore_read_notes
PARAMS ((bfd
*, file_ptr
, bfd_size_type
));
62 static boolean elf_find_function
PARAMS ((bfd
*, asection
*, asymbol
**,
63 bfd_vma
, const char **,
65 static int elfcore_make_pid
PARAMS ((bfd
*));
66 static boolean elfcore_maybe_make_sect
PARAMS ((bfd
*, char *, asection
*));
67 static boolean elfcore_make_note_pseudosection
PARAMS ((bfd
*, char *,
68 Elf_Internal_Note
*));
69 static boolean elfcore_grok_prfpreg
PARAMS ((bfd
*, Elf_Internal_Note
*));
70 static boolean elfcore_grok_prxfpreg
PARAMS ((bfd
*, Elf_Internal_Note
*));
71 static boolean elfcore_grok_note
PARAMS ((bfd
*, Elf_Internal_Note
*));
73 static boolean elfcore_netbsd_get_lwpid
PARAMS ((Elf_Internal_Note
*, int *));
74 static boolean elfcore_grok_netbsd_procinfo
PARAMS ((bfd
*,
75 Elf_Internal_Note
*));
76 static boolean elfcore_grok_netbsd_note
PARAMS ((bfd
*, Elf_Internal_Note
*));
78 /* Swap version information in and out. The version information is
79 currently size independent. If that ever changes, this code will
80 need to move into elfcode.h. */
82 /* Swap in a Verdef structure. */
85 _bfd_elf_swap_verdef_in (abfd
, src
, dst
)
87 const Elf_External_Verdef
*src
;
88 Elf_Internal_Verdef
*dst
;
90 dst
->vd_version
= H_GET_16 (abfd
, src
->vd_version
);
91 dst
->vd_flags
= H_GET_16 (abfd
, src
->vd_flags
);
92 dst
->vd_ndx
= H_GET_16 (abfd
, src
->vd_ndx
);
93 dst
->vd_cnt
= H_GET_16 (abfd
, src
->vd_cnt
);
94 dst
->vd_hash
= H_GET_32 (abfd
, src
->vd_hash
);
95 dst
->vd_aux
= H_GET_32 (abfd
, src
->vd_aux
);
96 dst
->vd_next
= H_GET_32 (abfd
, src
->vd_next
);
99 /* Swap out a Verdef structure. */
102 _bfd_elf_swap_verdef_out (abfd
, src
, dst
)
104 const Elf_Internal_Verdef
*src
;
105 Elf_External_Verdef
*dst
;
107 H_PUT_16 (abfd
, src
->vd_version
, dst
->vd_version
);
108 H_PUT_16 (abfd
, src
->vd_flags
, dst
->vd_flags
);
109 H_PUT_16 (abfd
, src
->vd_ndx
, dst
->vd_ndx
);
110 H_PUT_16 (abfd
, src
->vd_cnt
, dst
->vd_cnt
);
111 H_PUT_32 (abfd
, src
->vd_hash
, dst
->vd_hash
);
112 H_PUT_32 (abfd
, src
->vd_aux
, dst
->vd_aux
);
113 H_PUT_32 (abfd
, src
->vd_next
, dst
->vd_next
);
116 /* Swap in a Verdaux structure. */
119 _bfd_elf_swap_verdaux_in (abfd
, src
, dst
)
121 const Elf_External_Verdaux
*src
;
122 Elf_Internal_Verdaux
*dst
;
124 dst
->vda_name
= H_GET_32 (abfd
, src
->vda_name
);
125 dst
->vda_next
= H_GET_32 (abfd
, src
->vda_next
);
128 /* Swap out a Verdaux structure. */
131 _bfd_elf_swap_verdaux_out (abfd
, src
, dst
)
133 const Elf_Internal_Verdaux
*src
;
134 Elf_External_Verdaux
*dst
;
136 H_PUT_32 (abfd
, src
->vda_name
, dst
->vda_name
);
137 H_PUT_32 (abfd
, src
->vda_next
, dst
->vda_next
);
140 /* Swap in a Verneed structure. */
143 _bfd_elf_swap_verneed_in (abfd
, src
, dst
)
145 const Elf_External_Verneed
*src
;
146 Elf_Internal_Verneed
*dst
;
148 dst
->vn_version
= H_GET_16 (abfd
, src
->vn_version
);
149 dst
->vn_cnt
= H_GET_16 (abfd
, src
->vn_cnt
);
150 dst
->vn_file
= H_GET_32 (abfd
, src
->vn_file
);
151 dst
->vn_aux
= H_GET_32 (abfd
, src
->vn_aux
);
152 dst
->vn_next
= H_GET_32 (abfd
, src
->vn_next
);
155 /* Swap out a Verneed structure. */
158 _bfd_elf_swap_verneed_out (abfd
, src
, dst
)
160 const Elf_Internal_Verneed
*src
;
161 Elf_External_Verneed
*dst
;
163 H_PUT_16 (abfd
, src
->vn_version
, dst
->vn_version
);
164 H_PUT_16 (abfd
, src
->vn_cnt
, dst
->vn_cnt
);
165 H_PUT_32 (abfd
, src
->vn_file
, dst
->vn_file
);
166 H_PUT_32 (abfd
, src
->vn_aux
, dst
->vn_aux
);
167 H_PUT_32 (abfd
, src
->vn_next
, dst
->vn_next
);
170 /* Swap in a Vernaux structure. */
173 _bfd_elf_swap_vernaux_in (abfd
, src
, dst
)
175 const Elf_External_Vernaux
*src
;
176 Elf_Internal_Vernaux
*dst
;
178 dst
->vna_hash
= H_GET_32 (abfd
, src
->vna_hash
);
179 dst
->vna_flags
= H_GET_16 (abfd
, src
->vna_flags
);
180 dst
->vna_other
= H_GET_16 (abfd
, src
->vna_other
);
181 dst
->vna_name
= H_GET_32 (abfd
, src
->vna_name
);
182 dst
->vna_next
= H_GET_32 (abfd
, src
->vna_next
);
185 /* Swap out a Vernaux structure. */
188 _bfd_elf_swap_vernaux_out (abfd
, src
, dst
)
190 const Elf_Internal_Vernaux
*src
;
191 Elf_External_Vernaux
*dst
;
193 H_PUT_32 (abfd
, src
->vna_hash
, dst
->vna_hash
);
194 H_PUT_16 (abfd
, src
->vna_flags
, dst
->vna_flags
);
195 H_PUT_16 (abfd
, src
->vna_other
, dst
->vna_other
);
196 H_PUT_32 (abfd
, src
->vna_name
, dst
->vna_name
);
197 H_PUT_32 (abfd
, src
->vna_next
, dst
->vna_next
);
200 /* Swap in a Versym structure. */
203 _bfd_elf_swap_versym_in (abfd
, src
, dst
)
205 const Elf_External_Versym
*src
;
206 Elf_Internal_Versym
*dst
;
208 dst
->vs_vers
= H_GET_16 (abfd
, src
->vs_vers
);
211 /* Swap out a Versym structure. */
214 _bfd_elf_swap_versym_out (abfd
, src
, dst
)
216 const Elf_Internal_Versym
*src
;
217 Elf_External_Versym
*dst
;
219 H_PUT_16 (abfd
, src
->vs_vers
, dst
->vs_vers
);
222 /* Standard ELF hash function. Do not change this function; you will
223 cause invalid hash tables to be generated. */
226 bfd_elf_hash (namearg
)
229 const unsigned char *name
= (const unsigned char *) namearg
;
234 while ((ch
= *name
++) != '\0')
237 if ((g
= (h
& 0xf0000000)) != 0)
240 /* The ELF ABI says `h &= ~g', but this is equivalent in
241 this case and on some machines one insn instead of two. */
248 /* Read a specified number of bytes at a specified offset in an ELF
249 file, into a newly allocated buffer, and return a pointer to the
253 elf_read (abfd
, offset
, size
)
260 if ((buf
= bfd_alloc (abfd
, size
)) == NULL
)
262 if (bfd_seek (abfd
, offset
, SEEK_SET
) != 0)
264 if (bfd_bread ((PTR
) buf
, size
, abfd
) != size
)
266 if (bfd_get_error () != bfd_error_system_call
)
267 bfd_set_error (bfd_error_file_truncated
);
274 bfd_elf_mkobject (abfd
)
277 /* This just does initialization. */
278 /* coff_mkobject zalloc's space for tdata.coff_obj_data ... */
279 bfd_size_type amt
= sizeof (struct elf_obj_tdata
);
280 elf_tdata (abfd
) = (struct elf_obj_tdata
*) bfd_zalloc (abfd
, amt
);
281 if (elf_tdata (abfd
) == 0)
283 /* Since everything is done at close time, do we need any
290 bfd_elf_mkcorefile (abfd
)
293 /* I think this can be done just like an object file. */
294 return bfd_elf_mkobject (abfd
);
298 bfd_elf_get_str_section (abfd
, shindex
)
300 unsigned int shindex
;
302 Elf_Internal_Shdr
**i_shdrp
;
303 char *shstrtab
= NULL
;
305 bfd_size_type shstrtabsize
;
307 i_shdrp
= elf_elfsections (abfd
);
308 if (i_shdrp
== 0 || i_shdrp
[shindex
] == 0)
311 shstrtab
= (char *) i_shdrp
[shindex
]->contents
;
312 if (shstrtab
== NULL
)
314 /* No cached one, attempt to read, and cache what we read. */
315 offset
= i_shdrp
[shindex
]->sh_offset
;
316 shstrtabsize
= i_shdrp
[shindex
]->sh_size
;
317 shstrtab
= elf_read (abfd
, offset
, shstrtabsize
);
318 i_shdrp
[shindex
]->contents
= (PTR
) shstrtab
;
324 bfd_elf_string_from_elf_section (abfd
, shindex
, strindex
)
326 unsigned int shindex
;
327 unsigned int strindex
;
329 Elf_Internal_Shdr
*hdr
;
334 hdr
= elf_elfsections (abfd
)[shindex
];
336 if (hdr
->contents
== NULL
337 && bfd_elf_get_str_section (abfd
, shindex
) == NULL
)
340 if (strindex
>= hdr
->sh_size
)
342 (*_bfd_error_handler
)
343 (_("%s: invalid string offset %u >= %lu for section `%s'"),
344 bfd_archive_filename (abfd
), strindex
, (unsigned long) hdr
->sh_size
,
345 ((shindex
== elf_elfheader(abfd
)->e_shstrndx
346 && strindex
== hdr
->sh_name
)
348 : elf_string_from_elf_strtab (abfd
, hdr
->sh_name
)));
352 return ((char *) hdr
->contents
) + strindex
;
355 /* Read and convert symbols to internal format.
356 SYMCOUNT specifies the number of symbols to read, starting from
357 symbol SYMOFFSET. If any of INTSYM_BUF, EXTSYM_BUF or EXTSHNDX_BUF
358 are non-NULL, they are used to store the internal symbols, external
359 symbols, and symbol section index extensions, respectively. */
362 bfd_elf_get_elf_syms (ibfd
, symtab_hdr
, symcount
, symoffset
,
363 intsym_buf
, extsym_buf
, extshndx_buf
)
365 Elf_Internal_Shdr
*symtab_hdr
;
368 Elf_Internal_Sym
*intsym_buf
;
370 Elf_External_Sym_Shndx
*extshndx_buf
;
372 Elf_Internal_Shdr
*shndx_hdr
;
375 Elf_External_Sym_Shndx
*alloc_extshndx
;
376 Elf_External_Sym_Shndx
*shndx
;
377 Elf_Internal_Sym
*isym
;
378 Elf_Internal_Sym
*isymend
;
379 struct elf_backend_data
*bed
;
387 /* Normal syms might have section extension entries. */
389 if (symtab_hdr
== &elf_tdata (ibfd
)->symtab_hdr
)
390 shndx_hdr
= &elf_tdata (ibfd
)->symtab_shndx_hdr
;
392 /* Read the symbols. */
394 alloc_extshndx
= NULL
;
395 bed
= get_elf_backend_data (ibfd
);
396 extsym_size
= bed
->s
->sizeof_sym
;
397 amt
= symcount
* extsym_size
;
398 pos
= symtab_hdr
->sh_offset
+ symoffset
* extsym_size
;
399 if (extsym_buf
== NULL
)
401 alloc_ext
= bfd_malloc (amt
);
402 extsym_buf
= alloc_ext
;
404 if (extsym_buf
== NULL
405 || bfd_seek (ibfd
, pos
, SEEK_SET
) != 0
406 || bfd_bread (extsym_buf
, amt
, ibfd
) != amt
)
412 if (shndx_hdr
== NULL
|| shndx_hdr
->sh_size
== 0)
416 amt
= symcount
* sizeof (Elf_External_Sym_Shndx
);
417 pos
= shndx_hdr
->sh_offset
+ symoffset
* sizeof (Elf_External_Sym_Shndx
);
418 if (extshndx_buf
== NULL
)
420 alloc_extshndx
= (Elf_External_Sym_Shndx
*) bfd_malloc (amt
);
421 extshndx_buf
= alloc_extshndx
;
423 if (extshndx_buf
== NULL
424 || bfd_seek (ibfd
, pos
, SEEK_SET
) != 0
425 || bfd_bread (extshndx_buf
, amt
, ibfd
) != amt
)
432 if (intsym_buf
== NULL
)
434 bfd_size_type amt
= symcount
* sizeof (Elf_Internal_Sym
);
435 intsym_buf
= (Elf_Internal_Sym
*) bfd_malloc (amt
);
436 if (intsym_buf
== NULL
)
440 /* Convert the symbols to internal form. */
441 isymend
= intsym_buf
+ symcount
;
442 for (esym
= extsym_buf
, isym
= intsym_buf
, shndx
= extshndx_buf
;
444 esym
+= extsym_size
, isym
++, shndx
= shndx
!= NULL
? shndx
+ 1 : NULL
)
445 (*bed
->s
->swap_symbol_in
) (ibfd
, esym
, (const PTR
) shndx
, isym
);
448 if (alloc_ext
!= NULL
)
450 if (alloc_extshndx
!= NULL
)
451 free (alloc_extshndx
);
456 /* Elf_Internal_Shdr->contents is an array of these for SHT_GROUP
457 sections. The first element is the flags, the rest are section
460 typedef union elf_internal_group
{
461 Elf_Internal_Shdr
*shdr
;
463 } Elf_Internal_Group
;
465 /* Return the name of the group signature symbol. Why isn't the
466 signature just a string? */
469 group_signature (abfd
, ghdr
)
471 Elf_Internal_Shdr
*ghdr
;
473 Elf_Internal_Shdr
*hdr
;
474 unsigned char esym
[sizeof (Elf64_External_Sym
)];
475 Elf_External_Sym_Shndx eshndx
;
476 Elf_Internal_Sym isym
;
478 unsigned int shindex
;
480 /* First we need to ensure the symbol table is available. */
481 if (! bfd_section_from_shdr (abfd
, ghdr
->sh_link
))
484 /* Go read the symbol. */
485 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
486 if (bfd_elf_get_elf_syms (abfd
, hdr
, 1, ghdr
->sh_info
,
487 &isym
, esym
, &eshndx
) == NULL
)
490 /* Look up the symbol name. */
491 iname
= isym
.st_name
;
492 shindex
= hdr
->sh_link
;
493 if (iname
== 0 && ELF_ST_TYPE (isym
.st_info
) == STT_SECTION
)
495 iname
= elf_elfsections (abfd
)[isym
.st_shndx
]->sh_name
;
496 shindex
= elf_elfheader (abfd
)->e_shstrndx
;
499 return bfd_elf_string_from_elf_section (abfd
, shindex
, iname
);
502 /* Set next_in_group list pointer, and group name for NEWSECT. */
505 setup_group (abfd
, hdr
, newsect
)
507 Elf_Internal_Shdr
*hdr
;
510 unsigned int num_group
= elf_tdata (abfd
)->num_group
;
512 /* If num_group is zero, read in all SHT_GROUP sections. The count
513 is set to -1 if there are no SHT_GROUP sections. */
516 unsigned int i
, shnum
;
518 /* First count the number of groups. If we have a SHT_GROUP
519 section with just a flag word (ie. sh_size is 4), ignore it. */
520 shnum
= elf_numsections (abfd
);
522 for (i
= 0; i
< shnum
; i
++)
524 Elf_Internal_Shdr
*shdr
= elf_elfsections (abfd
)[i
];
525 if (shdr
->sh_type
== SHT_GROUP
&& shdr
->sh_size
>= 8)
530 num_group
= (unsigned) -1;
531 elf_tdata (abfd
)->num_group
= num_group
;
535 /* We keep a list of elf section headers for group sections,
536 so we can find them quickly. */
537 bfd_size_type amt
= num_group
* sizeof (Elf_Internal_Shdr
*);
538 elf_tdata (abfd
)->group_sect_ptr
= bfd_alloc (abfd
, amt
);
539 if (elf_tdata (abfd
)->group_sect_ptr
== NULL
)
543 for (i
= 0; i
< shnum
; i
++)
545 Elf_Internal_Shdr
*shdr
= elf_elfsections (abfd
)[i
];
546 if (shdr
->sh_type
== SHT_GROUP
&& shdr
->sh_size
>= 8)
549 Elf_Internal_Group
*dest
;
551 /* Add to list of sections. */
552 elf_tdata (abfd
)->group_sect_ptr
[num_group
] = shdr
;
555 /* Read the raw contents. */
556 BFD_ASSERT (sizeof (*dest
) >= 4);
557 amt
= shdr
->sh_size
* sizeof (*dest
) / 4;
558 shdr
->contents
= bfd_alloc (abfd
, amt
);
559 if (shdr
->contents
== NULL
560 || bfd_seek (abfd
, shdr
->sh_offset
, SEEK_SET
) != 0
561 || (bfd_bread (shdr
->contents
, shdr
->sh_size
, abfd
)
565 /* Translate raw contents, a flag word followed by an
566 array of elf section indices all in target byte order,
567 to the flag word followed by an array of elf section
569 src
= shdr
->contents
+ shdr
->sh_size
;
570 dest
= (Elf_Internal_Group
*) (shdr
->contents
+ amt
);
577 idx
= H_GET_32 (abfd
, src
);
578 if (src
== shdr
->contents
)
581 if (shdr
->bfd_section
!= NULL
&& (idx
& GRP_COMDAT
))
582 shdr
->bfd_section
->flags
583 |= SEC_LINK_ONCE
| SEC_LINK_DUPLICATES_DISCARD
;
588 ((*_bfd_error_handler
)
589 (_("%s: invalid SHT_GROUP entry"),
590 bfd_archive_filename (abfd
)));
593 dest
->shdr
= elf_elfsections (abfd
)[idx
];
600 if (num_group
!= (unsigned) -1)
604 for (i
= 0; i
< num_group
; i
++)
606 Elf_Internal_Shdr
*shdr
= elf_tdata (abfd
)->group_sect_ptr
[i
];
607 Elf_Internal_Group
*idx
= (Elf_Internal_Group
*) shdr
->contents
;
608 unsigned int n_elt
= shdr
->sh_size
/ 4;
610 /* Look through this group's sections to see if current
611 section is a member. */
613 if ((++idx
)->shdr
== hdr
)
617 /* We are a member of this group. Go looking through
618 other members to see if any others are linked via
620 idx
= (Elf_Internal_Group
*) shdr
->contents
;
621 n_elt
= shdr
->sh_size
/ 4;
623 if ((s
= (++idx
)->shdr
->bfd_section
) != NULL
624 && elf_next_in_group (s
) != NULL
)
628 /* Snarf the group name from other member, and
629 insert current section in circular list. */
630 elf_group_name (newsect
) = elf_group_name (s
);
631 elf_next_in_group (newsect
) = elf_next_in_group (s
);
632 elf_next_in_group (s
) = newsect
;
638 gname
= group_signature (abfd
, shdr
);
641 elf_group_name (newsect
) = gname
;
643 /* Start a circular list with one element. */
644 elf_next_in_group (newsect
) = newsect
;
647 /* If the group section has been created, point to the
649 if (shdr
->bfd_section
!= NULL
)
650 elf_next_in_group (shdr
->bfd_section
) = newsect
;
658 if (elf_group_name (newsect
) == NULL
)
660 (*_bfd_error_handler
) (_("%s: no group info for section %s"),
661 bfd_archive_filename (abfd
), newsect
->name
);
667 bfd_elf_discard_group (abfd
, group
)
668 bfd
*abfd ATTRIBUTE_UNUSED
;
671 asection
*first
= elf_next_in_group (group
);
676 s
->output_section
= bfd_abs_section_ptr
;
677 s
= elf_next_in_group (s
);
678 /* These lists are circular. */
685 /* Make a BFD section from an ELF section. We store a pointer to the
686 BFD section in the bfd_section field of the header. */
689 _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
)
691 Elf_Internal_Shdr
*hdr
;
696 struct elf_backend_data
*bed
;
698 if (hdr
->bfd_section
!= NULL
)
700 BFD_ASSERT (strcmp (name
,
701 bfd_get_section_name (abfd
, hdr
->bfd_section
)) == 0);
705 newsect
= bfd_make_section_anyway (abfd
, name
);
709 newsect
->filepos
= hdr
->sh_offset
;
711 if (! bfd_set_section_vma (abfd
, newsect
, hdr
->sh_addr
)
712 || ! bfd_set_section_size (abfd
, newsect
, hdr
->sh_size
)
713 || ! bfd_set_section_alignment (abfd
, newsect
,
714 bfd_log2 ((bfd_vma
) hdr
->sh_addralign
)))
717 flags
= SEC_NO_FLAGS
;
718 if (hdr
->sh_type
!= SHT_NOBITS
)
719 flags
|= SEC_HAS_CONTENTS
;
720 if (hdr
->sh_type
== SHT_GROUP
)
721 flags
|= SEC_GROUP
| SEC_EXCLUDE
;
722 if ((hdr
->sh_flags
& SHF_ALLOC
) != 0)
725 if (hdr
->sh_type
!= SHT_NOBITS
)
728 if ((hdr
->sh_flags
& SHF_WRITE
) == 0)
729 flags
|= SEC_READONLY
;
730 if ((hdr
->sh_flags
& SHF_EXECINSTR
) != 0)
732 else if ((flags
& SEC_LOAD
) != 0)
734 if ((hdr
->sh_flags
& SHF_MERGE
) != 0)
737 newsect
->entsize
= hdr
->sh_entsize
;
738 if ((hdr
->sh_flags
& SHF_STRINGS
) != 0)
739 flags
|= SEC_STRINGS
;
741 if (hdr
->sh_flags
& SHF_GROUP
)
742 if (!setup_group (abfd
, hdr
, newsect
))
744 if ((hdr
->sh_flags
& SHF_TLS
) != 0)
745 flags
|= SEC_THREAD_LOCAL
;
747 /* The debugging sections appear to be recognized only by name, not
750 static const char *debug_sec_names
[] =
759 for (i
= ARRAY_SIZE (debug_sec_names
); i
--;)
760 if (strncmp (name
, debug_sec_names
[i
], strlen (debug_sec_names
[i
])) == 0)
764 flags
|= SEC_DEBUGGING
;
767 /* As a GNU extension, if the name begins with .gnu.linkonce, we
768 only link a single copy of the section. This is used to support
769 g++. g++ will emit each template expansion in its own section.
770 The symbols will be defined as weak, so that multiple definitions
771 are permitted. The GNU linker extension is to actually discard
772 all but one of the sections. */
773 if (strncmp (name
, ".gnu.linkonce", sizeof ".gnu.linkonce" - 1) == 0
774 && elf_next_in_group (newsect
) == NULL
)
775 flags
|= SEC_LINK_ONCE
| SEC_LINK_DUPLICATES_DISCARD
;
777 bed
= get_elf_backend_data (abfd
);
778 if (bed
->elf_backend_section_flags
)
779 if (! bed
->elf_backend_section_flags (&flags
, hdr
))
782 if (! bfd_set_section_flags (abfd
, newsect
, flags
))
785 if ((flags
& SEC_ALLOC
) != 0)
787 Elf_Internal_Phdr
*phdr
;
790 /* Look through the phdrs to see if we need to adjust the lma.
791 If all the p_paddr fields are zero, we ignore them, since
792 some ELF linkers produce such output. */
793 phdr
= elf_tdata (abfd
)->phdr
;
794 for (i
= 0; i
< elf_elfheader (abfd
)->e_phnum
; i
++, phdr
++)
796 if (phdr
->p_paddr
!= 0)
799 if (i
< elf_elfheader (abfd
)->e_phnum
)
801 phdr
= elf_tdata (abfd
)->phdr
;
802 for (i
= 0; i
< elf_elfheader (abfd
)->e_phnum
; i
++, phdr
++)
804 /* This section is part of this segment if its file
805 offset plus size lies within the segment's memory
806 span and, if the section is loaded, the extent of the
807 loaded data lies within the extent of the segment.
809 Note - we used to check the p_paddr field as well, and
810 refuse to set the LMA if it was 0. This is wrong
811 though, as a perfectly valid initialised segment can
812 have a p_paddr of zero. Some architectures, eg ARM,
813 place special significance on the address 0 and
814 executables need to be able to have a segment which
815 covers this address. */
816 if (phdr
->p_type
== PT_LOAD
817 && (bfd_vma
) hdr
->sh_offset
>= phdr
->p_offset
818 && (hdr
->sh_offset
+ hdr
->sh_size
819 <= phdr
->p_offset
+ phdr
->p_memsz
)
820 && ((flags
& SEC_LOAD
) == 0
821 || (hdr
->sh_offset
+ hdr
->sh_size
822 <= phdr
->p_offset
+ phdr
->p_filesz
)))
824 if ((flags
& SEC_LOAD
) == 0)
825 newsect
->lma
= (phdr
->p_paddr
826 + hdr
->sh_addr
- phdr
->p_vaddr
);
828 /* We used to use the same adjustment for SEC_LOAD
829 sections, but that doesn't work if the segment
830 is packed with code from multiple VMAs.
831 Instead we calculate the section LMA based on
832 the segment LMA. It is assumed that the
833 segment will contain sections with contiguous
834 LMAs, even if the VMAs are not. */
835 newsect
->lma
= (phdr
->p_paddr
836 + hdr
->sh_offset
- phdr
->p_offset
);
838 /* With contiguous segments, we can't tell from file
839 offsets whether a section with zero size should
840 be placed at the end of one segment or the
841 beginning of the next. Decide based on vaddr. */
842 if (hdr
->sh_addr
>= phdr
->p_vaddr
843 && (hdr
->sh_addr
+ hdr
->sh_size
844 <= phdr
->p_vaddr
+ phdr
->p_memsz
))
851 hdr
->bfd_section
= newsect
;
852 elf_section_data (newsect
)->this_hdr
= *hdr
;
862 struct elf_internal_shdr *bfd_elf_find_section (bfd *abfd, char *name);
865 Helper functions for GDB to locate the string tables.
866 Since BFD hides string tables from callers, GDB needs to use an
867 internal hook to find them. Sun's .stabstr, in particular,
868 isn't even pointed to by the .stab section, so ordinary
869 mechanisms wouldn't work to find it, even if we had some.
872 struct elf_internal_shdr
*
873 bfd_elf_find_section (abfd
, name
)
877 Elf_Internal_Shdr
**i_shdrp
;
882 i_shdrp
= elf_elfsections (abfd
);
885 shstrtab
= bfd_elf_get_str_section (abfd
,
886 elf_elfheader (abfd
)->e_shstrndx
);
887 if (shstrtab
!= NULL
)
889 max
= elf_numsections (abfd
);
890 for (i
= 1; i
< max
; i
++)
891 if (!strcmp (&shstrtab
[i_shdrp
[i
]->sh_name
], name
))
898 const char *const bfd_elf_section_type_names
[] = {
899 "SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB",
900 "SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE",
901 "SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM",
904 /* ELF relocs are against symbols. If we are producing relocateable
905 output, and the reloc is against an external symbol, and nothing
906 has given us any additional addend, the resulting reloc will also
907 be against the same symbol. In such a case, we don't want to
908 change anything about the way the reloc is handled, since it will
909 all be done at final link time. Rather than put special case code
910 into bfd_perform_relocation, all the reloc types use this howto
911 function. It just short circuits the reloc if producing
912 relocateable output against an external symbol. */
914 bfd_reloc_status_type
915 bfd_elf_generic_reloc (abfd
,
922 bfd
*abfd ATTRIBUTE_UNUSED
;
923 arelent
*reloc_entry
;
925 PTR data ATTRIBUTE_UNUSED
;
926 asection
*input_section
;
928 char **error_message ATTRIBUTE_UNUSED
;
930 if (output_bfd
!= (bfd
*) NULL
931 && (symbol
->flags
& BSF_SECTION_SYM
) == 0
932 && (! reloc_entry
->howto
->partial_inplace
933 || reloc_entry
->addend
== 0))
935 reloc_entry
->address
+= input_section
->output_offset
;
939 return bfd_reloc_continue
;
942 /* Make sure sec_info_type is cleared if sec_info is cleared too. */
945 merge_sections_remove_hook (abfd
, sec
)
946 bfd
*abfd ATTRIBUTE_UNUSED
;
949 struct bfd_elf_section_data
*sec_data
;
951 sec_data
= elf_section_data (sec
);
952 BFD_ASSERT (sec_data
->sec_info_type
== ELF_INFO_TYPE_MERGE
);
953 sec_data
->sec_info_type
= ELF_INFO_TYPE_NONE
;
956 /* Finish SHF_MERGE section merging. */
959 _bfd_elf_merge_sections (abfd
, info
)
961 struct bfd_link_info
*info
;
963 if (!is_elf_hash_table (info
))
965 if (elf_hash_table (info
)->merge_info
)
966 _bfd_merge_sections (abfd
, elf_hash_table (info
)->merge_info
,
967 merge_sections_remove_hook
);
972 _bfd_elf_link_just_syms (sec
, info
)
974 struct bfd_link_info
*info
;
976 sec
->output_section
= bfd_abs_section_ptr
;
977 sec
->output_offset
= sec
->vma
;
978 if (!is_elf_hash_table (info
))
981 elf_section_data (sec
)->sec_info_type
= ELF_INFO_TYPE_JUST_SYMS
;
984 /* Copy the program header and other data from one object module to
988 _bfd_elf_copy_private_bfd_data (ibfd
, obfd
)
992 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
993 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
996 BFD_ASSERT (!elf_flags_init (obfd
)
997 || (elf_elfheader (obfd
)->e_flags
998 == elf_elfheader (ibfd
)->e_flags
));
1000 elf_gp (obfd
) = elf_gp (ibfd
);
1001 elf_elfheader (obfd
)->e_flags
= elf_elfheader (ibfd
)->e_flags
;
1002 elf_flags_init (obfd
) = true;
1006 /* Print out the program headers. */
1009 _bfd_elf_print_private_bfd_data (abfd
, farg
)
1013 FILE *f
= (FILE *) farg
;
1014 Elf_Internal_Phdr
*p
;
1016 bfd_byte
*dynbuf
= NULL
;
1018 p
= elf_tdata (abfd
)->phdr
;
1023 fprintf (f
, _("\nProgram Header:\n"));
1024 c
= elf_elfheader (abfd
)->e_phnum
;
1025 for (i
= 0; i
< c
; i
++, p
++)
1032 case PT_NULL
: pt
= "NULL"; break;
1033 case PT_LOAD
: pt
= "LOAD"; break;
1034 case PT_DYNAMIC
: pt
= "DYNAMIC"; break;
1035 case PT_INTERP
: pt
= "INTERP"; break;
1036 case PT_NOTE
: pt
= "NOTE"; break;
1037 case PT_SHLIB
: pt
= "SHLIB"; break;
1038 case PT_PHDR
: pt
= "PHDR"; break;
1039 case PT_TLS
: pt
= "TLS"; break;
1040 case PT_GNU_EH_FRAME
: pt
= "EH_FRAME"; break;
1041 default: sprintf (buf
, "0x%lx", p
->p_type
); pt
= buf
; break;
1043 fprintf (f
, "%8s off 0x", pt
);
1044 bfd_fprintf_vma (abfd
, f
, p
->p_offset
);
1045 fprintf (f
, " vaddr 0x");
1046 bfd_fprintf_vma (abfd
, f
, p
->p_vaddr
);
1047 fprintf (f
, " paddr 0x");
1048 bfd_fprintf_vma (abfd
, f
, p
->p_paddr
);
1049 fprintf (f
, " align 2**%u\n", bfd_log2 (p
->p_align
));
1050 fprintf (f
, " filesz 0x");
1051 bfd_fprintf_vma (abfd
, f
, p
->p_filesz
);
1052 fprintf (f
, " memsz 0x");
1053 bfd_fprintf_vma (abfd
, f
, p
->p_memsz
);
1054 fprintf (f
, " flags %c%c%c",
1055 (p
->p_flags
& PF_R
) != 0 ? 'r' : '-',
1056 (p
->p_flags
& PF_W
) != 0 ? 'w' : '-',
1057 (p
->p_flags
& PF_X
) != 0 ? 'x' : '-');
1058 if ((p
->p_flags
&~ (unsigned) (PF_R
| PF_W
| PF_X
)) != 0)
1059 fprintf (f
, " %lx", p
->p_flags
&~ (unsigned) (PF_R
| PF_W
| PF_X
));
1064 s
= bfd_get_section_by_name (abfd
, ".dynamic");
1068 unsigned long shlink
;
1069 bfd_byte
*extdyn
, *extdynend
;
1071 void (*swap_dyn_in
) PARAMS ((bfd
*, const PTR
, Elf_Internal_Dyn
*));
1073 fprintf (f
, _("\nDynamic Section:\n"));
1075 dynbuf
= (bfd_byte
*) bfd_malloc (s
->_raw_size
);
1078 if (! bfd_get_section_contents (abfd
, s
, (PTR
) dynbuf
, (file_ptr
) 0,
1082 elfsec
= _bfd_elf_section_from_bfd_section (abfd
, s
);
1085 shlink
= elf_elfsections (abfd
)[elfsec
]->sh_link
;
1087 extdynsize
= get_elf_backend_data (abfd
)->s
->sizeof_dyn
;
1088 swap_dyn_in
= get_elf_backend_data (abfd
)->s
->swap_dyn_in
;
1091 extdynend
= extdyn
+ s
->_raw_size
;
1092 for (; extdyn
< extdynend
; extdyn
+= extdynsize
)
1094 Elf_Internal_Dyn dyn
;
1099 (*swap_dyn_in
) (abfd
, (PTR
) extdyn
, &dyn
);
1101 if (dyn
.d_tag
== DT_NULL
)
1108 sprintf (ab
, "0x%lx", (unsigned long) dyn
.d_tag
);
1112 case DT_NEEDED
: name
= "NEEDED"; stringp
= true; break;
1113 case DT_PLTRELSZ
: name
= "PLTRELSZ"; break;
1114 case DT_PLTGOT
: name
= "PLTGOT"; break;
1115 case DT_HASH
: name
= "HASH"; break;
1116 case DT_STRTAB
: name
= "STRTAB"; break;
1117 case DT_SYMTAB
: name
= "SYMTAB"; break;
1118 case DT_RELA
: name
= "RELA"; break;
1119 case DT_RELASZ
: name
= "RELASZ"; break;
1120 case DT_RELAENT
: name
= "RELAENT"; break;
1121 case DT_STRSZ
: name
= "STRSZ"; break;
1122 case DT_SYMENT
: name
= "SYMENT"; break;
1123 case DT_INIT
: name
= "INIT"; break;
1124 case DT_FINI
: name
= "FINI"; break;
1125 case DT_SONAME
: name
= "SONAME"; stringp
= true; break;
1126 case DT_RPATH
: name
= "RPATH"; stringp
= true; break;
1127 case DT_SYMBOLIC
: name
= "SYMBOLIC"; break;
1128 case DT_REL
: name
= "REL"; break;
1129 case DT_RELSZ
: name
= "RELSZ"; break;
1130 case DT_RELENT
: name
= "RELENT"; break;
1131 case DT_PLTREL
: name
= "PLTREL"; break;
1132 case DT_DEBUG
: name
= "DEBUG"; break;
1133 case DT_TEXTREL
: name
= "TEXTREL"; break;
1134 case DT_JMPREL
: name
= "JMPREL"; break;
1135 case DT_BIND_NOW
: name
= "BIND_NOW"; break;
1136 case DT_INIT_ARRAY
: name
= "INIT_ARRAY"; break;
1137 case DT_FINI_ARRAY
: name
= "FINI_ARRAY"; break;
1138 case DT_INIT_ARRAYSZ
: name
= "INIT_ARRAYSZ"; break;
1139 case DT_FINI_ARRAYSZ
: name
= "FINI_ARRAYSZ"; break;
1140 case DT_RUNPATH
: name
= "RUNPATH"; stringp
= true; break;
1141 case DT_FLAGS
: name
= "FLAGS"; break;
1142 case DT_PREINIT_ARRAY
: name
= "PREINIT_ARRAY"; break;
1143 case DT_PREINIT_ARRAYSZ
: name
= "PREINIT_ARRAYSZ"; break;
1144 case DT_CHECKSUM
: name
= "CHECKSUM"; break;
1145 case DT_PLTPADSZ
: name
= "PLTPADSZ"; break;
1146 case DT_MOVEENT
: name
= "MOVEENT"; break;
1147 case DT_MOVESZ
: name
= "MOVESZ"; break;
1148 case DT_FEATURE
: name
= "FEATURE"; break;
1149 case DT_POSFLAG_1
: name
= "POSFLAG_1"; break;
1150 case DT_SYMINSZ
: name
= "SYMINSZ"; break;
1151 case DT_SYMINENT
: name
= "SYMINENT"; break;
1152 case DT_CONFIG
: name
= "CONFIG"; stringp
= true; break;
1153 case DT_DEPAUDIT
: name
= "DEPAUDIT"; stringp
= true; break;
1154 case DT_AUDIT
: name
= "AUDIT"; stringp
= true; break;
1155 case DT_PLTPAD
: name
= "PLTPAD"; break;
1156 case DT_MOVETAB
: name
= "MOVETAB"; break;
1157 case DT_SYMINFO
: name
= "SYMINFO"; break;
1158 case DT_RELACOUNT
: name
= "RELACOUNT"; break;
1159 case DT_RELCOUNT
: name
= "RELCOUNT"; break;
1160 case DT_FLAGS_1
: name
= "FLAGS_1"; break;
1161 case DT_VERSYM
: name
= "VERSYM"; break;
1162 case DT_VERDEF
: name
= "VERDEF"; break;
1163 case DT_VERDEFNUM
: name
= "VERDEFNUM"; break;
1164 case DT_VERNEED
: name
= "VERNEED"; break;
1165 case DT_VERNEEDNUM
: name
= "VERNEEDNUM"; break;
1166 case DT_AUXILIARY
: name
= "AUXILIARY"; stringp
= true; break;
1167 case DT_USED
: name
= "USED"; break;
1168 case DT_FILTER
: name
= "FILTER"; stringp
= true; break;
1171 fprintf (f
, " %-11s ", name
);
1173 fprintf (f
, "0x%lx", (unsigned long) dyn
.d_un
.d_val
);
1177 unsigned int tagv
= dyn
.d_un
.d_val
;
1179 string
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
1182 fprintf (f
, "%s", string
);
1191 if ((elf_dynverdef (abfd
) != 0 && elf_tdata (abfd
)->verdef
== NULL
)
1192 || (elf_dynverref (abfd
) != 0 && elf_tdata (abfd
)->verref
== NULL
))
1194 if (! _bfd_elf_slurp_version_tables (abfd
))
1198 if (elf_dynverdef (abfd
) != 0)
1200 Elf_Internal_Verdef
*t
;
1202 fprintf (f
, _("\nVersion definitions:\n"));
1203 for (t
= elf_tdata (abfd
)->verdef
; t
!= NULL
; t
= t
->vd_nextdef
)
1205 fprintf (f
, "%d 0x%2.2x 0x%8.8lx %s\n", t
->vd_ndx
,
1206 t
->vd_flags
, t
->vd_hash
, t
->vd_nodename
);
1207 if (t
->vd_auxptr
->vda_nextptr
!= NULL
)
1209 Elf_Internal_Verdaux
*a
;
1212 for (a
= t
->vd_auxptr
->vda_nextptr
;
1215 fprintf (f
, "%s ", a
->vda_nodename
);
1221 if (elf_dynverref (abfd
) != 0)
1223 Elf_Internal_Verneed
*t
;
1225 fprintf (f
, _("\nVersion References:\n"));
1226 for (t
= elf_tdata (abfd
)->verref
; t
!= NULL
; t
= t
->vn_nextref
)
1228 Elf_Internal_Vernaux
*a
;
1230 fprintf (f
, _(" required from %s:\n"), t
->vn_filename
);
1231 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
1232 fprintf (f
, " 0x%8.8lx 0x%2.2x %2.2d %s\n", a
->vna_hash
,
1233 a
->vna_flags
, a
->vna_other
, a
->vna_nodename
);
1245 /* Display ELF-specific fields of a symbol. */
1248 bfd_elf_print_symbol (abfd
, filep
, symbol
, how
)
1252 bfd_print_symbol_type how
;
1254 FILE *file
= (FILE *) filep
;
1257 case bfd_print_symbol_name
:
1258 fprintf (file
, "%s", symbol
->name
);
1260 case bfd_print_symbol_more
:
1261 fprintf (file
, "elf ");
1262 bfd_fprintf_vma (abfd
, file
, symbol
->value
);
1263 fprintf (file
, " %lx", (long) symbol
->flags
);
1265 case bfd_print_symbol_all
:
1267 const char *section_name
;
1268 const char *name
= NULL
;
1269 struct elf_backend_data
*bed
;
1270 unsigned char st_other
;
1273 section_name
= symbol
->section
? symbol
->section
->name
: "(*none*)";
1275 bed
= get_elf_backend_data (abfd
);
1276 if (bed
->elf_backend_print_symbol_all
)
1277 name
= (*bed
->elf_backend_print_symbol_all
) (abfd
, filep
, symbol
);
1281 name
= symbol
->name
;
1282 bfd_print_symbol_vandf (abfd
, (PTR
) file
, symbol
);
1285 fprintf (file
, " %s\t", section_name
);
1286 /* Print the "other" value for a symbol. For common symbols,
1287 we've already printed the size; now print the alignment.
1288 For other symbols, we have no specified alignment, and
1289 we've printed the address; now print the size. */
1290 if (bfd_is_com_section (symbol
->section
))
1291 val
= ((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_value
;
1293 val
= ((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_size
;
1294 bfd_fprintf_vma (abfd
, file
, val
);
1296 /* If we have version information, print it. */
1297 if (elf_tdata (abfd
)->dynversym_section
!= 0
1298 && (elf_tdata (abfd
)->dynverdef_section
!= 0
1299 || elf_tdata (abfd
)->dynverref_section
!= 0))
1301 unsigned int vernum
;
1302 const char *version_string
;
1304 vernum
= ((elf_symbol_type
*) symbol
)->version
& VERSYM_VERSION
;
1307 version_string
= "";
1308 else if (vernum
== 1)
1309 version_string
= "Base";
1310 else if (vernum
<= elf_tdata (abfd
)->cverdefs
)
1312 elf_tdata (abfd
)->verdef
[vernum
- 1].vd_nodename
;
1315 Elf_Internal_Verneed
*t
;
1317 version_string
= "";
1318 for (t
= elf_tdata (abfd
)->verref
;
1322 Elf_Internal_Vernaux
*a
;
1324 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
1326 if (a
->vna_other
== vernum
)
1328 version_string
= a
->vna_nodename
;
1335 if ((((elf_symbol_type
*) symbol
)->version
& VERSYM_HIDDEN
) == 0)
1336 fprintf (file
, " %-11s", version_string
);
1341 fprintf (file
, " (%s)", version_string
);
1342 for (i
= 10 - strlen (version_string
); i
> 0; --i
)
1347 /* If the st_other field is not zero, print it. */
1348 st_other
= ((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_other
;
1353 case STV_INTERNAL
: fprintf (file
, " .internal"); break;
1354 case STV_HIDDEN
: fprintf (file
, " .hidden"); break;
1355 case STV_PROTECTED
: fprintf (file
, " .protected"); break;
1357 /* Some other non-defined flags are also present, so print
1359 fprintf (file
, " 0x%02x", (unsigned int) st_other
);
1362 fprintf (file
, " %s", name
);
1368 /* Create an entry in an ELF linker hash table. */
1370 struct bfd_hash_entry
*
1371 _bfd_elf_link_hash_newfunc (entry
, table
, string
)
1372 struct bfd_hash_entry
*entry
;
1373 struct bfd_hash_table
*table
;
1376 /* Allocate the structure if it has not already been allocated by a
1380 entry
= bfd_hash_allocate (table
, sizeof (struct elf_link_hash_entry
));
1385 /* Call the allocation method of the superclass. */
1386 entry
= _bfd_link_hash_newfunc (entry
, table
, string
);
1389 struct elf_link_hash_entry
*ret
= (struct elf_link_hash_entry
*) entry
;
1390 struct elf_link_hash_table
*htab
= (struct elf_link_hash_table
*) table
;
1392 /* Set local fields. */
1396 ret
->dynstr_index
= 0;
1397 ret
->weakdef
= NULL
;
1398 ret
->got
.refcount
= htab
->init_refcount
;
1399 ret
->plt
.refcount
= htab
->init_refcount
;
1400 ret
->linker_section_pointer
= NULL
;
1401 ret
->verinfo
.verdef
= NULL
;
1402 ret
->vtable_entries_used
= NULL
;
1403 ret
->vtable_entries_size
= 0;
1404 ret
->vtable_parent
= NULL
;
1405 ret
->type
= STT_NOTYPE
;
1407 /* Assume that we have been called by a non-ELF symbol reader.
1408 This flag is then reset by the code which reads an ELF input
1409 file. This ensures that a symbol created by a non-ELF symbol
1410 reader will have the flag set correctly. */
1411 ret
->elf_link_hash_flags
= ELF_LINK_NON_ELF
;
1417 /* Copy data from an indirect symbol to its direct symbol, hiding the
1418 old indirect symbol. Also used for copying flags to a weakdef. */
1421 _bfd_elf_link_hash_copy_indirect (dir
, ind
)
1422 struct elf_link_hash_entry
*dir
, *ind
;
1426 /* Copy down any references that we may have already seen to the
1427 symbol which just became indirect. */
1429 dir
->elf_link_hash_flags
|=
1430 (ind
->elf_link_hash_flags
1431 & (ELF_LINK_HASH_REF_DYNAMIC
1432 | ELF_LINK_HASH_REF_REGULAR
1433 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
1434 | ELF_LINK_NON_GOT_REF
));
1436 if (ind
->root
.type
!= bfd_link_hash_indirect
)
1439 /* Copy over the global and procedure linkage table refcount entries.
1440 These may have been already set up by a check_relocs routine. */
1441 tmp
= dir
->got
.refcount
;
1444 dir
->got
.refcount
= ind
->got
.refcount
;
1445 ind
->got
.refcount
= tmp
;
1448 BFD_ASSERT (ind
->got
.refcount
<= 0);
1450 tmp
= dir
->plt
.refcount
;
1453 dir
->plt
.refcount
= ind
->plt
.refcount
;
1454 ind
->plt
.refcount
= tmp
;
1457 BFD_ASSERT (ind
->plt
.refcount
<= 0);
1459 if (dir
->dynindx
== -1)
1461 dir
->dynindx
= ind
->dynindx
;
1462 dir
->dynstr_index
= ind
->dynstr_index
;
1464 ind
->dynstr_index
= 0;
1467 BFD_ASSERT (ind
->dynindx
== -1);
1471 _bfd_elf_link_hash_hide_symbol (info
, h
, force_local
)
1472 struct bfd_link_info
*info
;
1473 struct elf_link_hash_entry
*h
;
1474 boolean force_local
;
1476 h
->plt
.offset
= (bfd_vma
) -1;
1477 h
->elf_link_hash_flags
&= ~ELF_LINK_HASH_NEEDS_PLT
;
1480 h
->elf_link_hash_flags
|= ELF_LINK_FORCED_LOCAL
;
1481 if (h
->dynindx
!= -1)
1484 _bfd_elf_strtab_delref (elf_hash_table (info
)->dynstr
,
1490 /* Initialize an ELF linker hash table. */
1493 _bfd_elf_link_hash_table_init (table
, abfd
, newfunc
)
1494 struct elf_link_hash_table
*table
;
1496 struct bfd_hash_entry
*(*newfunc
) PARAMS ((struct bfd_hash_entry
*,
1497 struct bfd_hash_table
*,
1502 table
->dynamic_sections_created
= false;
1503 table
->dynobj
= NULL
;
1504 table
->init_refcount
= get_elf_backend_data (abfd
)->can_refcount
- 1;
1505 /* The first dynamic symbol is a dummy. */
1506 table
->dynsymcount
= 1;
1507 table
->dynstr
= NULL
;
1508 table
->bucketcount
= 0;
1509 table
->needed
= NULL
;
1510 table
->runpath
= NULL
;
1511 table
->loaded
= NULL
;
1513 table
->stab_info
= NULL
;
1514 table
->merge_info
= NULL
;
1515 table
->dynlocal
= NULL
;
1516 ret
= _bfd_link_hash_table_init (& table
->root
, abfd
, newfunc
);
1517 table
->root
.type
= bfd_link_elf_hash_table
;
1522 /* Create an ELF linker hash table. */
1524 struct bfd_link_hash_table
*
1525 _bfd_elf_link_hash_table_create (abfd
)
1528 struct elf_link_hash_table
*ret
;
1529 bfd_size_type amt
= sizeof (struct elf_link_hash_table
);
1531 ret
= (struct elf_link_hash_table
*) bfd_malloc (amt
);
1532 if (ret
== (struct elf_link_hash_table
*) NULL
)
1535 if (! _bfd_elf_link_hash_table_init (ret
, abfd
, _bfd_elf_link_hash_newfunc
))
1544 /* This is a hook for the ELF emulation code in the generic linker to
1545 tell the backend linker what file name to use for the DT_NEEDED
1546 entry for a dynamic object. The generic linker passes name as an
1547 empty string to indicate that no DT_NEEDED entry should be made. */
1550 bfd_elf_set_dt_needed_name (abfd
, name
)
1554 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1555 && bfd_get_format (abfd
) == bfd_object
)
1556 elf_dt_name (abfd
) = name
;
1560 bfd_elf_set_dt_needed_soname (abfd
, name
)
1564 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1565 && bfd_get_format (abfd
) == bfd_object
)
1566 elf_dt_soname (abfd
) = name
;
1569 /* Get the list of DT_NEEDED entries for a link. This is a hook for
1570 the linker ELF emulation code. */
1572 struct bfd_link_needed_list
*
1573 bfd_elf_get_needed_list (abfd
, info
)
1574 bfd
*abfd ATTRIBUTE_UNUSED
;
1575 struct bfd_link_info
*info
;
1577 if (info
->hash
->creator
->flavour
!= bfd_target_elf_flavour
)
1579 return elf_hash_table (info
)->needed
;
1582 /* Get the list of DT_RPATH/DT_RUNPATH entries for a link. This is a
1583 hook for the linker ELF emulation code. */
1585 struct bfd_link_needed_list
*
1586 bfd_elf_get_runpath_list (abfd
, info
)
1587 bfd
*abfd ATTRIBUTE_UNUSED
;
1588 struct bfd_link_info
*info
;
1590 if (info
->hash
->creator
->flavour
!= bfd_target_elf_flavour
)
1592 return elf_hash_table (info
)->runpath
;
1595 /* Get the name actually used for a dynamic object for a link. This
1596 is the SONAME entry if there is one. Otherwise, it is the string
1597 passed to bfd_elf_set_dt_needed_name, or it is the filename. */
1600 bfd_elf_get_dt_soname (abfd
)
1603 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1604 && bfd_get_format (abfd
) == bfd_object
)
1605 return elf_dt_name (abfd
);
1609 /* Get the list of DT_NEEDED entries from a BFD. This is a hook for
1610 the ELF linker emulation code. */
1613 bfd_elf_get_bfd_needed_list (abfd
, pneeded
)
1615 struct bfd_link_needed_list
**pneeded
;
1618 bfd_byte
*dynbuf
= NULL
;
1620 unsigned long shlink
;
1621 bfd_byte
*extdyn
, *extdynend
;
1623 void (*swap_dyn_in
) PARAMS ((bfd
*, const PTR
, Elf_Internal_Dyn
*));
1627 if (bfd_get_flavour (abfd
) != bfd_target_elf_flavour
1628 || bfd_get_format (abfd
) != bfd_object
)
1631 s
= bfd_get_section_by_name (abfd
, ".dynamic");
1632 if (s
== NULL
|| s
->_raw_size
== 0)
1635 dynbuf
= (bfd_byte
*) bfd_malloc (s
->_raw_size
);
1639 if (! bfd_get_section_contents (abfd
, s
, (PTR
) dynbuf
, (file_ptr
) 0,
1643 elfsec
= _bfd_elf_section_from_bfd_section (abfd
, s
);
1647 shlink
= elf_elfsections (abfd
)[elfsec
]->sh_link
;
1649 extdynsize
= get_elf_backend_data (abfd
)->s
->sizeof_dyn
;
1650 swap_dyn_in
= get_elf_backend_data (abfd
)->s
->swap_dyn_in
;
1653 extdynend
= extdyn
+ s
->_raw_size
;
1654 for (; extdyn
< extdynend
; extdyn
+= extdynsize
)
1656 Elf_Internal_Dyn dyn
;
1658 (*swap_dyn_in
) (abfd
, (PTR
) extdyn
, &dyn
);
1660 if (dyn
.d_tag
== DT_NULL
)
1663 if (dyn
.d_tag
== DT_NEEDED
)
1666 struct bfd_link_needed_list
*l
;
1667 unsigned int tagv
= dyn
.d_un
.d_val
;
1670 string
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
1675 l
= (struct bfd_link_needed_list
*) bfd_alloc (abfd
, amt
);
1696 /* Allocate an ELF string table--force the first byte to be zero. */
1698 struct bfd_strtab_hash
*
1699 _bfd_elf_stringtab_init ()
1701 struct bfd_strtab_hash
*ret
;
1703 ret
= _bfd_stringtab_init ();
1708 loc
= _bfd_stringtab_add (ret
, "", true, false);
1709 BFD_ASSERT (loc
== 0 || loc
== (bfd_size_type
) -1);
1710 if (loc
== (bfd_size_type
) -1)
1712 _bfd_stringtab_free (ret
);
1719 /* ELF .o/exec file reading */
1721 /* Create a new bfd section from an ELF section header. */
1724 bfd_section_from_shdr (abfd
, shindex
)
1726 unsigned int shindex
;
1728 Elf_Internal_Shdr
*hdr
= elf_elfsections (abfd
)[shindex
];
1729 Elf_Internal_Ehdr
*ehdr
= elf_elfheader (abfd
);
1730 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
1733 name
= elf_string_from_elf_strtab (abfd
, hdr
->sh_name
);
1735 switch (hdr
->sh_type
)
1738 /* Inactive section. Throw it away. */
1741 case SHT_PROGBITS
: /* Normal section with contents. */
1742 case SHT_NOBITS
: /* .bss section. */
1743 case SHT_HASH
: /* .hash section. */
1744 case SHT_NOTE
: /* .note section. */
1745 case SHT_INIT_ARRAY
: /* .init_array section. */
1746 case SHT_FINI_ARRAY
: /* .fini_array section. */
1747 case SHT_PREINIT_ARRAY
: /* .preinit_array section. */
1748 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1750 case SHT_DYNAMIC
: /* Dynamic linking information. */
1751 if (! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
))
1753 if (elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_STRTAB
)
1755 Elf_Internal_Shdr
*dynsymhdr
;
1757 /* The shared libraries distributed with hpux11 have a bogus
1758 sh_link field for the ".dynamic" section. Find the
1759 string table for the ".dynsym" section instead. */
1760 if (elf_dynsymtab (abfd
) != 0)
1762 dynsymhdr
= elf_elfsections (abfd
)[elf_dynsymtab (abfd
)];
1763 hdr
->sh_link
= dynsymhdr
->sh_link
;
1767 unsigned int i
, num_sec
;
1769 num_sec
= elf_numsections (abfd
);
1770 for (i
= 1; i
< num_sec
; i
++)
1772 dynsymhdr
= elf_elfsections (abfd
)[i
];
1773 if (dynsymhdr
->sh_type
== SHT_DYNSYM
)
1775 hdr
->sh_link
= dynsymhdr
->sh_link
;
1783 case SHT_SYMTAB
: /* A symbol table */
1784 if (elf_onesymtab (abfd
) == shindex
)
1787 BFD_ASSERT (hdr
->sh_entsize
== bed
->s
->sizeof_sym
);
1788 BFD_ASSERT (elf_onesymtab (abfd
) == 0);
1789 elf_onesymtab (abfd
) = shindex
;
1790 elf_tdata (abfd
)->symtab_hdr
= *hdr
;
1791 elf_elfsections (abfd
)[shindex
] = hdr
= &elf_tdata (abfd
)->symtab_hdr
;
1792 abfd
->flags
|= HAS_SYMS
;
1794 /* Sometimes a shared object will map in the symbol table. If
1795 SHF_ALLOC is set, and this is a shared object, then we also
1796 treat this section as a BFD section. We can not base the
1797 decision purely on SHF_ALLOC, because that flag is sometimes
1798 set in a relocateable object file, which would confuse the
1800 if ((hdr
->sh_flags
& SHF_ALLOC
) != 0
1801 && (abfd
->flags
& DYNAMIC
) != 0
1802 && ! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
))
1807 case SHT_DYNSYM
: /* A dynamic symbol table */
1808 if (elf_dynsymtab (abfd
) == shindex
)
1811 BFD_ASSERT (hdr
->sh_entsize
== bed
->s
->sizeof_sym
);
1812 BFD_ASSERT (elf_dynsymtab (abfd
) == 0);
1813 elf_dynsymtab (abfd
) = shindex
;
1814 elf_tdata (abfd
)->dynsymtab_hdr
= *hdr
;
1815 elf_elfsections (abfd
)[shindex
] = hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
1816 abfd
->flags
|= HAS_SYMS
;
1818 /* Besides being a symbol table, we also treat this as a regular
1819 section, so that objcopy can handle it. */
1820 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1822 case SHT_SYMTAB_SHNDX
: /* Symbol section indices when >64k sections */
1823 if (elf_symtab_shndx (abfd
) == shindex
)
1826 /* Get the associated symbol table. */
1827 if (! bfd_section_from_shdr (abfd
, hdr
->sh_link
)
1828 || hdr
->sh_link
!= elf_onesymtab (abfd
))
1831 elf_symtab_shndx (abfd
) = shindex
;
1832 elf_tdata (abfd
)->symtab_shndx_hdr
= *hdr
;
1833 elf_elfsections (abfd
)[shindex
] = &elf_tdata (abfd
)->symtab_shndx_hdr
;
1836 case SHT_STRTAB
: /* A string table */
1837 if (hdr
->bfd_section
!= NULL
)
1839 if (ehdr
->e_shstrndx
== shindex
)
1841 elf_tdata (abfd
)->shstrtab_hdr
= *hdr
;
1842 elf_elfsections (abfd
)[shindex
] = &elf_tdata (abfd
)->shstrtab_hdr
;
1846 unsigned int i
, num_sec
;
1848 num_sec
= elf_numsections (abfd
);
1849 for (i
= 1; i
< num_sec
; i
++)
1851 Elf_Internal_Shdr
*hdr2
= elf_elfsections (abfd
)[i
];
1852 if (hdr2
->sh_link
== shindex
)
1854 if (! bfd_section_from_shdr (abfd
, i
))
1856 if (elf_onesymtab (abfd
) == i
)
1858 elf_tdata (abfd
)->strtab_hdr
= *hdr
;
1859 elf_elfsections (abfd
)[shindex
] =
1860 &elf_tdata (abfd
)->strtab_hdr
;
1863 if (elf_dynsymtab (abfd
) == i
)
1865 elf_tdata (abfd
)->dynstrtab_hdr
= *hdr
;
1866 elf_elfsections (abfd
)[shindex
] = hdr
=
1867 &elf_tdata (abfd
)->dynstrtab_hdr
;
1868 /* We also treat this as a regular section, so
1869 that objcopy can handle it. */
1872 #if 0 /* Not handling other string tables specially right now. */
1873 hdr2
= elf_elfsections (abfd
)[i
]; /* in case it moved */
1874 /* We have a strtab for some random other section. */
1875 newsect
= (asection
*) hdr2
->bfd_section
;
1878 hdr
->bfd_section
= newsect
;
1879 hdr2
= &elf_section_data (newsect
)->str_hdr
;
1881 elf_elfsections (abfd
)[shindex
] = hdr2
;
1887 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1891 /* *These* do a lot of work -- but build no sections! */
1893 asection
*target_sect
;
1894 Elf_Internal_Shdr
*hdr2
;
1895 unsigned int num_sec
= elf_numsections (abfd
);
1897 /* Check for a bogus link to avoid crashing. */
1898 if ((hdr
->sh_link
>= SHN_LORESERVE
&& hdr
->sh_link
<= SHN_HIRESERVE
)
1899 || hdr
->sh_link
>= num_sec
)
1901 ((*_bfd_error_handler
)
1902 (_("%s: invalid link %lu for reloc section %s (index %u)"),
1903 bfd_archive_filename (abfd
), hdr
->sh_link
, name
, shindex
));
1904 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1907 /* For some incomprehensible reason Oracle distributes
1908 libraries for Solaris in which some of the objects have
1909 bogus sh_link fields. It would be nice if we could just
1910 reject them, but, unfortunately, some people need to use
1911 them. We scan through the section headers; if we find only
1912 one suitable symbol table, we clobber the sh_link to point
1913 to it. I hope this doesn't break anything. */
1914 if (elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_SYMTAB
1915 && elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_DYNSYM
)
1921 for (scan
= 1; scan
< num_sec
; scan
++)
1923 if (elf_elfsections (abfd
)[scan
]->sh_type
== SHT_SYMTAB
1924 || elf_elfsections (abfd
)[scan
]->sh_type
== SHT_DYNSYM
)
1935 hdr
->sh_link
= found
;
1938 /* Get the symbol table. */
1939 if (elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
== SHT_SYMTAB
1940 && ! bfd_section_from_shdr (abfd
, hdr
->sh_link
))
1943 /* If this reloc section does not use the main symbol table we
1944 don't treat it as a reloc section. BFD can't adequately
1945 represent such a section, so at least for now, we don't
1946 try. We just present it as a normal section. We also
1947 can't use it as a reloc section if it points to the null
1949 if (hdr
->sh_link
!= elf_onesymtab (abfd
) || hdr
->sh_info
== SHN_UNDEF
)
1950 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1952 if (! bfd_section_from_shdr (abfd
, hdr
->sh_info
))
1954 target_sect
= bfd_section_from_elf_index (abfd
, hdr
->sh_info
);
1955 if (target_sect
== NULL
)
1958 if ((target_sect
->flags
& SEC_RELOC
) == 0
1959 || target_sect
->reloc_count
== 0)
1960 hdr2
= &elf_section_data (target_sect
)->rel_hdr
;
1964 BFD_ASSERT (elf_section_data (target_sect
)->rel_hdr2
== NULL
);
1965 amt
= sizeof (*hdr2
);
1966 hdr2
= (Elf_Internal_Shdr
*) bfd_alloc (abfd
, amt
);
1967 elf_section_data (target_sect
)->rel_hdr2
= hdr2
;
1970 elf_elfsections (abfd
)[shindex
] = hdr2
;
1971 target_sect
->reloc_count
+= NUM_SHDR_ENTRIES (hdr
);
1972 target_sect
->flags
|= SEC_RELOC
;
1973 target_sect
->relocation
= NULL
;
1974 target_sect
->rel_filepos
= hdr
->sh_offset
;
1975 /* In the section to which the relocations apply, mark whether
1976 its relocations are of the REL or RELA variety. */
1977 if (hdr
->sh_size
!= 0)
1978 elf_section_data (target_sect
)->use_rela_p
1979 = (hdr
->sh_type
== SHT_RELA
);
1980 abfd
->flags
|= HAS_RELOC
;
1985 case SHT_GNU_verdef
:
1986 elf_dynverdef (abfd
) = shindex
;
1987 elf_tdata (abfd
)->dynverdef_hdr
= *hdr
;
1988 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1991 case SHT_GNU_versym
:
1992 elf_dynversym (abfd
) = shindex
;
1993 elf_tdata (abfd
)->dynversym_hdr
= *hdr
;
1994 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1997 case SHT_GNU_verneed
:
1998 elf_dynverref (abfd
) = shindex
;
1999 elf_tdata (abfd
)->dynverref_hdr
= *hdr
;
2000 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
2007 /* We need a BFD section for objcopy and relocatable linking,
2008 and it's handy to have the signature available as the section
2010 name
= group_signature (abfd
, hdr
);
2013 if (!_bfd_elf_make_section_from_shdr (abfd
, hdr
, name
))
2015 if (hdr
->contents
!= NULL
)
2017 Elf_Internal_Group
*idx
= (Elf_Internal_Group
*) hdr
->contents
;
2018 unsigned int n_elt
= hdr
->sh_size
/ 4;
2021 if (idx
->flags
& GRP_COMDAT
)
2022 hdr
->bfd_section
->flags
2023 |= SEC_LINK_ONCE
| SEC_LINK_DUPLICATES_DISCARD
;
2025 while (--n_elt
!= 0)
2026 if ((s
= (++idx
)->shdr
->bfd_section
) != NULL
2027 && elf_next_in_group (s
) != NULL
)
2029 elf_next_in_group (hdr
->bfd_section
) = s
;
2036 /* Check for any processor-specific section types. */
2038 if (bed
->elf_backend_section_from_shdr
)
2039 (*bed
->elf_backend_section_from_shdr
) (abfd
, hdr
, name
);
2047 /* Return the section for the local symbol specified by ABFD, R_SYMNDX.
2048 Return SEC for sections that have no elf section, and NULL on error. */
2051 bfd_section_from_r_symndx (abfd
, cache
, sec
, r_symndx
)
2053 struct sym_sec_cache
*cache
;
2055 unsigned long r_symndx
;
2057 Elf_Internal_Shdr
*symtab_hdr
;
2058 unsigned char esym
[sizeof (Elf64_External_Sym
)];
2059 Elf_External_Sym_Shndx eshndx
;
2060 Elf_Internal_Sym isym
;
2061 unsigned int ent
= r_symndx
% LOCAL_SYM_CACHE_SIZE
;
2063 if (cache
->abfd
== abfd
&& cache
->indx
[ent
] == r_symndx
)
2064 return cache
->sec
[ent
];
2066 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2067 if (bfd_elf_get_elf_syms (abfd
, symtab_hdr
, 1, r_symndx
,
2068 &isym
, esym
, &eshndx
) == NULL
)
2071 if (cache
->abfd
!= abfd
)
2073 memset (cache
->indx
, -1, sizeof (cache
->indx
));
2076 cache
->indx
[ent
] = r_symndx
;
2077 cache
->sec
[ent
] = sec
;
2078 if (isym
.st_shndx
< SHN_LORESERVE
|| isym
.st_shndx
> SHN_HIRESERVE
)
2081 s
= bfd_section_from_elf_index (abfd
, isym
.st_shndx
);
2083 cache
->sec
[ent
] = s
;
2085 return cache
->sec
[ent
];
2088 /* Given an ELF section number, retrieve the corresponding BFD
2092 bfd_section_from_elf_index (abfd
, index
)
2096 if (index
>= elf_numsections (abfd
))
2098 return elf_elfsections (abfd
)[index
]->bfd_section
;
2102 _bfd_elf_new_section_hook (abfd
, sec
)
2106 struct bfd_elf_section_data
*sdata
;
2107 bfd_size_type amt
= sizeof (*sdata
);
2109 sdata
= (struct bfd_elf_section_data
*) bfd_zalloc (abfd
, amt
);
2112 sec
->used_by_bfd
= (PTR
) sdata
;
2114 /* Indicate whether or not this section should use RELA relocations. */
2116 = get_elf_backend_data (abfd
)->default_use_rela_p
;
2121 /* Create a new bfd section from an ELF program header.
2123 Since program segments have no names, we generate a synthetic name
2124 of the form segment<NUM>, where NUM is generally the index in the
2125 program header table. For segments that are split (see below) we
2126 generate the names segment<NUM>a and segment<NUM>b.
2128 Note that some program segments may have a file size that is different than
2129 (less than) the memory size. All this means is that at execution the
2130 system must allocate the amount of memory specified by the memory size,
2131 but only initialize it with the first "file size" bytes read from the
2132 file. This would occur for example, with program segments consisting
2133 of combined data+bss.
2135 To handle the above situation, this routine generates TWO bfd sections
2136 for the single program segment. The first has the length specified by
2137 the file size of the segment, and the second has the length specified
2138 by the difference between the two sizes. In effect, the segment is split
2139 into it's initialized and uninitialized parts.
2144 _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, typename
)
2146 Elf_Internal_Phdr
*hdr
;
2148 const char *typename
;
2156 split
= ((hdr
->p_memsz
> 0)
2157 && (hdr
->p_filesz
> 0)
2158 && (hdr
->p_memsz
> hdr
->p_filesz
));
2159 sprintf (namebuf
, "%s%d%s", typename
, index
, split
? "a" : "");
2160 len
= strlen (namebuf
) + 1;
2161 name
= bfd_alloc (abfd
, (bfd_size_type
) len
);
2164 memcpy (name
, namebuf
, len
);
2165 newsect
= bfd_make_section (abfd
, name
);
2166 if (newsect
== NULL
)
2168 newsect
->vma
= hdr
->p_vaddr
;
2169 newsect
->lma
= hdr
->p_paddr
;
2170 newsect
->_raw_size
= hdr
->p_filesz
;
2171 newsect
->filepos
= hdr
->p_offset
;
2172 newsect
->flags
|= SEC_HAS_CONTENTS
;
2173 if (hdr
->p_type
== PT_LOAD
)
2175 newsect
->flags
|= SEC_ALLOC
;
2176 newsect
->flags
|= SEC_LOAD
;
2177 if (hdr
->p_flags
& PF_X
)
2179 /* FIXME: all we known is that it has execute PERMISSION,
2181 newsect
->flags
|= SEC_CODE
;
2184 if (!(hdr
->p_flags
& PF_W
))
2186 newsect
->flags
|= SEC_READONLY
;
2191 sprintf (namebuf
, "%s%db", typename
, index
);
2192 len
= strlen (namebuf
) + 1;
2193 name
= bfd_alloc (abfd
, (bfd_size_type
) len
);
2196 memcpy (name
, namebuf
, len
);
2197 newsect
= bfd_make_section (abfd
, name
);
2198 if (newsect
== NULL
)
2200 newsect
->vma
= hdr
->p_vaddr
+ hdr
->p_filesz
;
2201 newsect
->lma
= hdr
->p_paddr
+ hdr
->p_filesz
;
2202 newsect
->_raw_size
= hdr
->p_memsz
- hdr
->p_filesz
;
2203 if (hdr
->p_type
== PT_LOAD
)
2205 newsect
->flags
|= SEC_ALLOC
;
2206 if (hdr
->p_flags
& PF_X
)
2207 newsect
->flags
|= SEC_CODE
;
2209 if (!(hdr
->p_flags
& PF_W
))
2210 newsect
->flags
|= SEC_READONLY
;
2217 bfd_section_from_phdr (abfd
, hdr
, index
)
2219 Elf_Internal_Phdr
*hdr
;
2222 struct elf_backend_data
*bed
;
2224 switch (hdr
->p_type
)
2227 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "null");
2230 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "load");
2233 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "dynamic");
2236 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "interp");
2239 if (! _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "note"))
2241 if (! elfcore_read_notes (abfd
, (file_ptr
) hdr
->p_offset
, hdr
->p_filesz
))
2246 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "shlib");
2249 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "phdr");
2252 /* Check for any processor-specific program segment types.
2253 If no handler for them, default to making "segment" sections. */
2254 bed
= get_elf_backend_data (abfd
);
2255 if (bed
->elf_backend_section_from_phdr
)
2256 return (*bed
->elf_backend_section_from_phdr
) (abfd
, hdr
, index
);
2258 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "segment");
2262 /* Initialize REL_HDR, the section-header for new section, containing
2263 relocations against ASECT. If USE_RELA_P is true, we use RELA
2264 relocations; otherwise, we use REL relocations. */
2267 _bfd_elf_init_reloc_shdr (abfd
, rel_hdr
, asect
, use_rela_p
)
2269 Elf_Internal_Shdr
*rel_hdr
;
2274 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2275 bfd_size_type amt
= sizeof ".rela" + strlen (asect
->name
);
2277 name
= bfd_alloc (abfd
, amt
);
2280 sprintf (name
, "%s%s", use_rela_p
? ".rela" : ".rel", asect
->name
);
2282 (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd
), name
,
2284 if (rel_hdr
->sh_name
== (unsigned int) -1)
2286 rel_hdr
->sh_type
= use_rela_p
? SHT_RELA
: SHT_REL
;
2287 rel_hdr
->sh_entsize
= (use_rela_p
2288 ? bed
->s
->sizeof_rela
2289 : bed
->s
->sizeof_rel
);
2290 rel_hdr
->sh_addralign
= bed
->s
->file_align
;
2291 rel_hdr
->sh_flags
= 0;
2292 rel_hdr
->sh_addr
= 0;
2293 rel_hdr
->sh_size
= 0;
2294 rel_hdr
->sh_offset
= 0;
2299 /* Set up an ELF internal section header for a section. */
2302 elf_fake_sections (abfd
, asect
, failedptrarg
)
2307 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2308 boolean
*failedptr
= (boolean
*) failedptrarg
;
2309 Elf_Internal_Shdr
*this_hdr
;
2313 /* We already failed; just get out of the bfd_map_over_sections
2318 this_hdr
= &elf_section_data (asect
)->this_hdr
;
2320 this_hdr
->sh_name
= (unsigned long) _bfd_elf_strtab_add (elf_shstrtab (abfd
),
2321 asect
->name
, false);
2322 if (this_hdr
->sh_name
== (unsigned long) -1)
2328 this_hdr
->sh_flags
= 0;
2330 if ((asect
->flags
& SEC_ALLOC
) != 0
2331 || asect
->user_set_vma
)
2332 this_hdr
->sh_addr
= asect
->vma
;
2334 this_hdr
->sh_addr
= 0;
2336 this_hdr
->sh_offset
= 0;
2337 this_hdr
->sh_size
= asect
->_raw_size
;
2338 this_hdr
->sh_link
= 0;
2339 this_hdr
->sh_addralign
= 1 << asect
->alignment_power
;
2340 /* The sh_entsize and sh_info fields may have been set already by
2341 copy_private_section_data. */
2343 this_hdr
->bfd_section
= asect
;
2344 this_hdr
->contents
= NULL
;
2346 /* FIXME: This should not be based on section names. */
2347 if (strcmp (asect
->name
, ".dynstr") == 0)
2348 this_hdr
->sh_type
= SHT_STRTAB
;
2349 else if (strcmp (asect
->name
, ".hash") == 0)
2351 this_hdr
->sh_type
= SHT_HASH
;
2352 this_hdr
->sh_entsize
= bed
->s
->sizeof_hash_entry
;
2354 else if (strcmp (asect
->name
, ".dynsym") == 0)
2356 this_hdr
->sh_type
= SHT_DYNSYM
;
2357 this_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
2359 else if (strcmp (asect
->name
, ".dynamic") == 0)
2361 this_hdr
->sh_type
= SHT_DYNAMIC
;
2362 this_hdr
->sh_entsize
= bed
->s
->sizeof_dyn
;
2364 else if (strncmp (asect
->name
, ".rela", 5) == 0
2365 && get_elf_backend_data (abfd
)->may_use_rela_p
)
2367 this_hdr
->sh_type
= SHT_RELA
;
2368 this_hdr
->sh_entsize
= bed
->s
->sizeof_rela
;
2370 else if (strncmp (asect
->name
, ".rel", 4) == 0
2371 && get_elf_backend_data (abfd
)->may_use_rel_p
)
2373 this_hdr
->sh_type
= SHT_REL
;
2374 this_hdr
->sh_entsize
= bed
->s
->sizeof_rel
;
2376 else if (strcmp (asect
->name
, ".init_array") == 0)
2377 this_hdr
->sh_type
= SHT_INIT_ARRAY
;
2378 else if (strcmp (asect
->name
, ".fini_array") == 0)
2379 this_hdr
->sh_type
= SHT_FINI_ARRAY
;
2380 else if (strcmp (asect
->name
, ".preinit_array") == 0)
2381 this_hdr
->sh_type
= SHT_PREINIT_ARRAY
;
2382 else if (strncmp (asect
->name
, ".note", 5) == 0)
2383 this_hdr
->sh_type
= SHT_NOTE
;
2384 else if (strncmp (asect
->name
, ".stab", 5) == 0
2385 && strcmp (asect
->name
+ strlen (asect
->name
) - 3, "str") == 0)
2386 this_hdr
->sh_type
= SHT_STRTAB
;
2387 else if (strcmp (asect
->name
, ".gnu.version") == 0)
2389 this_hdr
->sh_type
= SHT_GNU_versym
;
2390 this_hdr
->sh_entsize
= sizeof (Elf_External_Versym
);
2392 else if (strcmp (asect
->name
, ".gnu.version_d") == 0)
2394 this_hdr
->sh_type
= SHT_GNU_verdef
;
2395 this_hdr
->sh_entsize
= 0;
2396 /* objcopy or strip will copy over sh_info, but may not set
2397 cverdefs. The linker will set cverdefs, but sh_info will be
2399 if (this_hdr
->sh_info
== 0)
2400 this_hdr
->sh_info
= elf_tdata (abfd
)->cverdefs
;
2402 BFD_ASSERT (elf_tdata (abfd
)->cverdefs
== 0
2403 || this_hdr
->sh_info
== elf_tdata (abfd
)->cverdefs
);
2405 else if (strcmp (asect
->name
, ".gnu.version_r") == 0)
2407 this_hdr
->sh_type
= SHT_GNU_verneed
;
2408 this_hdr
->sh_entsize
= 0;
2409 /* objcopy or strip will copy over sh_info, but may not set
2410 cverrefs. The linker will set cverrefs, but sh_info will be
2412 if (this_hdr
->sh_info
== 0)
2413 this_hdr
->sh_info
= elf_tdata (abfd
)->cverrefs
;
2415 BFD_ASSERT (elf_tdata (abfd
)->cverrefs
== 0
2416 || this_hdr
->sh_info
== elf_tdata (abfd
)->cverrefs
);
2418 else if ((asect
->flags
& SEC_GROUP
) != 0)
2420 this_hdr
->sh_type
= SHT_GROUP
;
2421 this_hdr
->sh_entsize
= 4;
2423 else if ((asect
->flags
& SEC_ALLOC
) != 0
2424 && (((asect
->flags
& (SEC_LOAD
| SEC_HAS_CONTENTS
)) == 0)
2425 || (asect
->flags
& SEC_NEVER_LOAD
) != 0))
2426 this_hdr
->sh_type
= SHT_NOBITS
;
2428 this_hdr
->sh_type
= SHT_PROGBITS
;
2430 if ((asect
->flags
& SEC_ALLOC
) != 0)
2431 this_hdr
->sh_flags
|= SHF_ALLOC
;
2432 if ((asect
->flags
& SEC_READONLY
) == 0)
2433 this_hdr
->sh_flags
|= SHF_WRITE
;
2434 if ((asect
->flags
& SEC_CODE
) != 0)
2435 this_hdr
->sh_flags
|= SHF_EXECINSTR
;
2436 if ((asect
->flags
& SEC_MERGE
) != 0)
2438 this_hdr
->sh_flags
|= SHF_MERGE
;
2439 this_hdr
->sh_entsize
= asect
->entsize
;
2440 if ((asect
->flags
& SEC_STRINGS
) != 0)
2441 this_hdr
->sh_flags
|= SHF_STRINGS
;
2443 if ((asect
->flags
& SEC_GROUP
) == 0 && elf_group_name (asect
) != NULL
)
2444 this_hdr
->sh_flags
|= SHF_GROUP
;
2445 if ((asect
->flags
& SEC_THREAD_LOCAL
) != 0)
2446 this_hdr
->sh_flags
|= SHF_TLS
;
2448 /* Check for processor-specific section types. */
2449 if (bed
->elf_backend_fake_sections
2450 && !(*bed
->elf_backend_fake_sections
) (abfd
, this_hdr
, asect
))
2453 /* If the section has relocs, set up a section header for the
2454 SHT_REL[A] section. If two relocation sections are required for
2455 this section, it is up to the processor-specific back-end to
2456 create the other. */
2457 if ((asect
->flags
& SEC_RELOC
) != 0
2458 && !_bfd_elf_init_reloc_shdr (abfd
,
2459 &elf_section_data (asect
)->rel_hdr
,
2461 elf_section_data (asect
)->use_rela_p
))
2465 /* Fill in the contents of a SHT_GROUP section. */
2468 bfd_elf_set_group_contents (abfd
, sec
, failedptrarg
)
2473 boolean
*failedptr
= (boolean
*) failedptrarg
;
2474 unsigned long symindx
;
2475 asection
*elt
, *first
;
2477 struct bfd_link_order
*l
;
2480 if (elf_section_data (sec
)->this_hdr
.sh_type
!= SHT_GROUP
2485 if (elf_group_id (sec
) != NULL
)
2486 symindx
= elf_group_id (sec
)->udata
.i
;
2490 /* If called from the assembler, swap_out_syms will have set up
2491 elf_section_syms; If called for "ld -r", use target_index. */
2492 if (elf_section_syms (abfd
) != NULL
)
2493 symindx
= elf_section_syms (abfd
)[sec
->index
]->udata
.i
;
2495 symindx
= sec
->target_index
;
2497 elf_section_data (sec
)->this_hdr
.sh_info
= symindx
;
2499 /* The contents won't be allocated for "ld -r" or objcopy. */
2501 if (sec
->contents
== NULL
)
2504 sec
->contents
= bfd_alloc (abfd
, sec
->_raw_size
);
2506 /* Arrange for the section to be written out. */
2507 elf_section_data (sec
)->this_hdr
.contents
= sec
->contents
;
2508 if (sec
->contents
== NULL
)
2515 loc
= sec
->contents
+ sec
->_raw_size
;
2517 /* Get the pointer to the first section in the group that gas
2518 squirreled away here. objcopy arranges for this to be set to the
2519 start of the input section group. */
2520 first
= elt
= elf_next_in_group (sec
);
2522 /* First element is a flag word. Rest of section is elf section
2523 indices for all the sections of the group. Write them backwards
2524 just to keep the group in the same order as given in .section
2525 directives, not that it matters. */
2534 s
= s
->output_section
;
2537 idx
= elf_section_data (s
)->this_idx
;
2538 H_PUT_32 (abfd
, idx
, loc
);
2539 elt
= elf_next_in_group (elt
);
2544 /* If this is a relocatable link, then the above did nothing because
2545 SEC is the output section. Look through the input sections
2547 for (l
= sec
->link_order_head
; l
!= NULL
; l
= l
->next
)
2548 if (l
->type
== bfd_indirect_link_order
2549 && (elt
= elf_next_in_group (l
->u
.indirect
.section
)) != NULL
)
2554 elf_section_data (elt
->output_section
)->this_idx
, loc
);
2555 elt
= elf_next_in_group (elt
);
2556 /* During a relocatable link, the lists are circular. */
2558 while (elt
!= elf_next_in_group (l
->u
.indirect
.section
));
2560 /* With ld -r, merging SHT_GROUP sections results in wasted space
2561 due to allowing for the flag word on each input. We may well
2562 duplicate entries too. */
2563 while ((loc
-= 4) > sec
->contents
)
2564 H_PUT_32 (abfd
, 0, loc
);
2566 if (loc
!= sec
->contents
)
2569 H_PUT_32 (abfd
, sec
->flags
& SEC_LINK_ONCE
? GRP_COMDAT
: 0, loc
);
2572 /* Assign all ELF section numbers. The dummy first section is handled here
2573 too. The link/info pointers for the standard section types are filled
2574 in here too, while we're at it. */
2577 assign_section_numbers (abfd
)
2580 struct elf_obj_tdata
*t
= elf_tdata (abfd
);
2582 unsigned int section_number
, secn
;
2583 Elf_Internal_Shdr
**i_shdrp
;
2588 _bfd_elf_strtab_clear_all_refs (elf_shstrtab (abfd
));
2590 for (sec
= abfd
->sections
; sec
; sec
= sec
->next
)
2592 struct bfd_elf_section_data
*d
= elf_section_data (sec
);
2594 if (section_number
== SHN_LORESERVE
)
2595 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2596 d
->this_idx
= section_number
++;
2597 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->this_hdr
.sh_name
);
2598 if ((sec
->flags
& SEC_RELOC
) == 0)
2602 if (section_number
== SHN_LORESERVE
)
2603 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2604 d
->rel_idx
= section_number
++;
2605 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->rel_hdr
.sh_name
);
2610 if (section_number
== SHN_LORESERVE
)
2611 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2612 d
->rel_idx2
= section_number
++;
2613 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->rel_hdr2
->sh_name
);
2619 if (section_number
== SHN_LORESERVE
)
2620 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2621 t
->shstrtab_section
= section_number
++;
2622 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->shstrtab_hdr
.sh_name
);
2623 elf_elfheader (abfd
)->e_shstrndx
= t
->shstrtab_section
;
2625 if (bfd_get_symcount (abfd
) > 0)
2627 if (section_number
== SHN_LORESERVE
)
2628 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2629 t
->symtab_section
= section_number
++;
2630 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->symtab_hdr
.sh_name
);
2631 if (section_number
> SHN_LORESERVE
- 2)
2633 if (section_number
== SHN_LORESERVE
)
2634 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2635 t
->symtab_shndx_section
= section_number
++;
2636 t
->symtab_shndx_hdr
.sh_name
2637 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd
),
2638 ".symtab_shndx", false);
2639 if (t
->symtab_shndx_hdr
.sh_name
== (unsigned int) -1)
2642 if (section_number
== SHN_LORESERVE
)
2643 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2644 t
->strtab_section
= section_number
++;
2645 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->strtab_hdr
.sh_name
);
2648 _bfd_elf_strtab_finalize (elf_shstrtab (abfd
));
2649 t
->shstrtab_hdr
.sh_size
= _bfd_elf_strtab_size (elf_shstrtab (abfd
));
2651 elf_numsections (abfd
) = section_number
;
2652 elf_elfheader (abfd
)->e_shnum
= section_number
;
2653 if (section_number
> SHN_LORESERVE
)
2654 elf_elfheader (abfd
)->e_shnum
-= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2656 /* Set up the list of section header pointers, in agreement with the
2658 amt
= section_number
* sizeof (Elf_Internal_Shdr
*);
2659 i_shdrp
= (Elf_Internal_Shdr
**) bfd_alloc (abfd
, amt
);
2660 if (i_shdrp
== NULL
)
2663 amt
= sizeof (Elf_Internal_Shdr
);
2664 i_shdrp
[0] = (Elf_Internal_Shdr
*) bfd_alloc (abfd
, amt
);
2665 if (i_shdrp
[0] == NULL
)
2667 bfd_release (abfd
, i_shdrp
);
2670 memset (i_shdrp
[0], 0, sizeof (Elf_Internal_Shdr
));
2672 elf_elfsections (abfd
) = i_shdrp
;
2674 i_shdrp
[t
->shstrtab_section
] = &t
->shstrtab_hdr
;
2675 if (bfd_get_symcount (abfd
) > 0)
2677 i_shdrp
[t
->symtab_section
] = &t
->symtab_hdr
;
2678 if (elf_numsections (abfd
) > SHN_LORESERVE
)
2680 i_shdrp
[t
->symtab_shndx_section
] = &t
->symtab_shndx_hdr
;
2681 t
->symtab_shndx_hdr
.sh_link
= t
->symtab_section
;
2683 i_shdrp
[t
->strtab_section
] = &t
->strtab_hdr
;
2684 t
->symtab_hdr
.sh_link
= t
->strtab_section
;
2686 for (sec
= abfd
->sections
; sec
; sec
= sec
->next
)
2688 struct bfd_elf_section_data
*d
= elf_section_data (sec
);
2692 i_shdrp
[d
->this_idx
] = &d
->this_hdr
;
2693 if (d
->rel_idx
!= 0)
2694 i_shdrp
[d
->rel_idx
] = &d
->rel_hdr
;
2695 if (d
->rel_idx2
!= 0)
2696 i_shdrp
[d
->rel_idx2
] = d
->rel_hdr2
;
2698 /* Fill in the sh_link and sh_info fields while we're at it. */
2700 /* sh_link of a reloc section is the section index of the symbol
2701 table. sh_info is the section index of the section to which
2702 the relocation entries apply. */
2703 if (d
->rel_idx
!= 0)
2705 d
->rel_hdr
.sh_link
= t
->symtab_section
;
2706 d
->rel_hdr
.sh_info
= d
->this_idx
;
2708 if (d
->rel_idx2
!= 0)
2710 d
->rel_hdr2
->sh_link
= t
->symtab_section
;
2711 d
->rel_hdr2
->sh_info
= d
->this_idx
;
2714 switch (d
->this_hdr
.sh_type
)
2718 /* A reloc section which we are treating as a normal BFD
2719 section. sh_link is the section index of the symbol
2720 table. sh_info is the section index of the section to
2721 which the relocation entries apply. We assume that an
2722 allocated reloc section uses the dynamic symbol table.
2723 FIXME: How can we be sure? */
2724 s
= bfd_get_section_by_name (abfd
, ".dynsym");
2726 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
2728 /* We look up the section the relocs apply to by name. */
2730 if (d
->this_hdr
.sh_type
== SHT_REL
)
2734 s
= bfd_get_section_by_name (abfd
, name
);
2736 d
->this_hdr
.sh_info
= elf_section_data (s
)->this_idx
;
2740 /* We assume that a section named .stab*str is a stabs
2741 string section. We look for a section with the same name
2742 but without the trailing ``str'', and set its sh_link
2743 field to point to this section. */
2744 if (strncmp (sec
->name
, ".stab", sizeof ".stab" - 1) == 0
2745 && strcmp (sec
->name
+ strlen (sec
->name
) - 3, "str") == 0)
2750 len
= strlen (sec
->name
);
2751 alc
= (char *) bfd_malloc ((bfd_size_type
) (len
- 2));
2754 memcpy (alc
, sec
->name
, len
- 3);
2755 alc
[len
- 3] = '\0';
2756 s
= bfd_get_section_by_name (abfd
, alc
);
2760 elf_section_data (s
)->this_hdr
.sh_link
= d
->this_idx
;
2762 /* This is a .stab section. */
2763 if (elf_section_data (s
)->this_hdr
.sh_entsize
== 0)
2764 elf_section_data (s
)->this_hdr
.sh_entsize
2765 = 4 + 2 * bfd_get_arch_size (abfd
) / 8;
2772 case SHT_GNU_verneed
:
2773 case SHT_GNU_verdef
:
2774 /* sh_link is the section header index of the string table
2775 used for the dynamic entries, or the symbol table, or the
2777 s
= bfd_get_section_by_name (abfd
, ".dynstr");
2779 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
2783 case SHT_GNU_versym
:
2784 /* sh_link is the section header index of the symbol table
2785 this hash table or version table is for. */
2786 s
= bfd_get_section_by_name (abfd
, ".dynsym");
2788 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
2792 d
->this_hdr
.sh_link
= t
->symtab_section
;
2796 for (secn
= 1; secn
< section_number
; ++secn
)
2797 if (i_shdrp
[secn
] == NULL
)
2798 i_shdrp
[secn
] = i_shdrp
[0];
2800 i_shdrp
[secn
]->sh_name
= _bfd_elf_strtab_offset (elf_shstrtab (abfd
),
2801 i_shdrp
[secn
]->sh_name
);
2805 /* Map symbol from it's internal number to the external number, moving
2806 all local symbols to be at the head of the list. */
2809 sym_is_global (abfd
, sym
)
2813 /* If the backend has a special mapping, use it. */
2814 if (get_elf_backend_data (abfd
)->elf_backend_sym_is_global
)
2815 return ((*get_elf_backend_data (abfd
)->elf_backend_sym_is_global
)
2818 return ((sym
->flags
& (BSF_GLOBAL
| BSF_WEAK
)) != 0
2819 || bfd_is_und_section (bfd_get_section (sym
))
2820 || bfd_is_com_section (bfd_get_section (sym
)));
2824 elf_map_symbols (abfd
)
2827 unsigned int symcount
= bfd_get_symcount (abfd
);
2828 asymbol
**syms
= bfd_get_outsymbols (abfd
);
2829 asymbol
**sect_syms
;
2830 unsigned int num_locals
= 0;
2831 unsigned int num_globals
= 0;
2832 unsigned int num_locals2
= 0;
2833 unsigned int num_globals2
= 0;
2841 fprintf (stderr
, "elf_map_symbols\n");
2845 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
2847 if (max_index
< asect
->index
)
2848 max_index
= asect
->index
;
2852 amt
= max_index
* sizeof (asymbol
*);
2853 sect_syms
= (asymbol
**) bfd_zalloc (abfd
, amt
);
2854 if (sect_syms
== NULL
)
2856 elf_section_syms (abfd
) = sect_syms
;
2857 elf_num_section_syms (abfd
) = max_index
;
2859 /* Init sect_syms entries for any section symbols we have already
2860 decided to output. */
2861 for (idx
= 0; idx
< symcount
; idx
++)
2863 asymbol
*sym
= syms
[idx
];
2865 if ((sym
->flags
& BSF_SECTION_SYM
) != 0
2872 if (sec
->owner
!= NULL
)
2874 if (sec
->owner
!= abfd
)
2876 if (sec
->output_offset
!= 0)
2879 sec
= sec
->output_section
;
2881 /* Empty sections in the input files may have had a
2882 section symbol created for them. (See the comment
2883 near the end of _bfd_generic_link_output_symbols in
2884 linker.c). If the linker script discards such
2885 sections then we will reach this point. Since we know
2886 that we cannot avoid this case, we detect it and skip
2887 the abort and the assignment to the sect_syms array.
2888 To reproduce this particular case try running the
2889 linker testsuite test ld-scripts/weak.exp for an ELF
2890 port that uses the generic linker. */
2891 if (sec
->owner
== NULL
)
2894 BFD_ASSERT (sec
->owner
== abfd
);
2896 sect_syms
[sec
->index
] = syms
[idx
];
2901 /* Classify all of the symbols. */
2902 for (idx
= 0; idx
< symcount
; idx
++)
2904 if (!sym_is_global (abfd
, syms
[idx
]))
2910 /* We will be adding a section symbol for each BFD section. Most normal
2911 sections will already have a section symbol in outsymbols, but
2912 eg. SHT_GROUP sections will not, and we need the section symbol mapped
2913 at least in that case. */
2914 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
2916 if (sect_syms
[asect
->index
] == NULL
)
2918 if (!sym_is_global (abfd
, asect
->symbol
))
2925 /* Now sort the symbols so the local symbols are first. */
2926 amt
= (num_locals
+ num_globals
) * sizeof (asymbol
*);
2927 new_syms
= (asymbol
**) bfd_alloc (abfd
, amt
);
2929 if (new_syms
== NULL
)
2932 for (idx
= 0; idx
< symcount
; idx
++)
2934 asymbol
*sym
= syms
[idx
];
2937 if (!sym_is_global (abfd
, sym
))
2940 i
= num_locals
+ num_globals2
++;
2942 sym
->udata
.i
= i
+ 1;
2944 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
2946 if (sect_syms
[asect
->index
] == NULL
)
2948 asymbol
*sym
= asect
->symbol
;
2951 sect_syms
[asect
->index
] = sym
;
2952 if (!sym_is_global (abfd
, sym
))
2955 i
= num_locals
+ num_globals2
++;
2957 sym
->udata
.i
= i
+ 1;
2961 bfd_set_symtab (abfd
, new_syms
, num_locals
+ num_globals
);
2963 elf_num_locals (abfd
) = num_locals
;
2964 elf_num_globals (abfd
) = num_globals
;
2968 /* Align to the maximum file alignment that could be required for any
2969 ELF data structure. */
2971 static INLINE file_ptr align_file_position
PARAMS ((file_ptr
, int));
2972 static INLINE file_ptr
2973 align_file_position (off
, align
)
2977 return (off
+ align
- 1) & ~(align
- 1);
2980 /* Assign a file position to a section, optionally aligning to the
2981 required section alignment. */
2984 _bfd_elf_assign_file_position_for_section (i_shdrp
, offset
, align
)
2985 Elf_Internal_Shdr
*i_shdrp
;
2993 al
= i_shdrp
->sh_addralign
;
2995 offset
= BFD_ALIGN (offset
, al
);
2997 i_shdrp
->sh_offset
= offset
;
2998 if (i_shdrp
->bfd_section
!= NULL
)
2999 i_shdrp
->bfd_section
->filepos
= offset
;
3000 if (i_shdrp
->sh_type
!= SHT_NOBITS
)
3001 offset
+= i_shdrp
->sh_size
;
3005 /* Compute the file positions we are going to put the sections at, and
3006 otherwise prepare to begin writing out the ELF file. If LINK_INFO
3007 is not NULL, this is being called by the ELF backend linker. */
3010 _bfd_elf_compute_section_file_positions (abfd
, link_info
)
3012 struct bfd_link_info
*link_info
;
3014 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3016 struct bfd_strtab_hash
*strtab
;
3017 Elf_Internal_Shdr
*shstrtab_hdr
;
3019 if (abfd
->output_has_begun
)
3022 /* Do any elf backend specific processing first. */
3023 if (bed
->elf_backend_begin_write_processing
)
3024 (*bed
->elf_backend_begin_write_processing
) (abfd
, link_info
);
3026 if (! prep_headers (abfd
))
3029 /* Post process the headers if necessary. */
3030 if (bed
->elf_backend_post_process_headers
)
3031 (*bed
->elf_backend_post_process_headers
) (abfd
, link_info
);
3034 bfd_map_over_sections (abfd
, elf_fake_sections
, &failed
);
3038 if (!assign_section_numbers (abfd
))
3041 /* The backend linker builds symbol table information itself. */
3042 if (link_info
== NULL
&& bfd_get_symcount (abfd
) > 0)
3044 /* Non-zero if doing a relocatable link. */
3045 int relocatable_p
= ! (abfd
->flags
& (EXEC_P
| DYNAMIC
));
3047 if (! swap_out_syms (abfd
, &strtab
, relocatable_p
))
3051 if (link_info
== NULL
)
3053 bfd_map_over_sections (abfd
, bfd_elf_set_group_contents
, &failed
);
3058 shstrtab_hdr
= &elf_tdata (abfd
)->shstrtab_hdr
;
3059 /* sh_name was set in prep_headers. */
3060 shstrtab_hdr
->sh_type
= SHT_STRTAB
;
3061 shstrtab_hdr
->sh_flags
= 0;
3062 shstrtab_hdr
->sh_addr
= 0;
3063 shstrtab_hdr
->sh_size
= _bfd_elf_strtab_size (elf_shstrtab (abfd
));
3064 shstrtab_hdr
->sh_entsize
= 0;
3065 shstrtab_hdr
->sh_link
= 0;
3066 shstrtab_hdr
->sh_info
= 0;
3067 /* sh_offset is set in assign_file_positions_except_relocs. */
3068 shstrtab_hdr
->sh_addralign
= 1;
3070 if (!assign_file_positions_except_relocs (abfd
))
3073 if (link_info
== NULL
&& bfd_get_symcount (abfd
) > 0)
3076 Elf_Internal_Shdr
*hdr
;
3078 off
= elf_tdata (abfd
)->next_file_pos
;
3080 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
3081 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, true);
3083 hdr
= &elf_tdata (abfd
)->symtab_shndx_hdr
;
3084 if (hdr
->sh_size
!= 0)
3085 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, true);
3087 hdr
= &elf_tdata (abfd
)->strtab_hdr
;
3088 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, true);
3090 elf_tdata (abfd
)->next_file_pos
= off
;
3092 /* Now that we know where the .strtab section goes, write it
3094 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
3095 || ! _bfd_stringtab_emit (abfd
, strtab
))
3097 _bfd_stringtab_free (strtab
);
3100 abfd
->output_has_begun
= true;
3105 /* Create a mapping from a set of sections to a program segment. */
3107 static INLINE
struct elf_segment_map
*
3108 make_mapping (abfd
, sections
, from
, to
, phdr
)
3110 asection
**sections
;
3115 struct elf_segment_map
*m
;
3120 amt
= sizeof (struct elf_segment_map
);
3121 amt
+= (to
- from
- 1) * sizeof (asection
*);
3122 m
= (struct elf_segment_map
*) bfd_zalloc (abfd
, amt
);
3126 m
->p_type
= PT_LOAD
;
3127 for (i
= from
, hdrpp
= sections
+ from
; i
< to
; i
++, hdrpp
++)
3128 m
->sections
[i
- from
] = *hdrpp
;
3129 m
->count
= to
- from
;
3131 if (from
== 0 && phdr
)
3133 /* Include the headers in the first PT_LOAD segment. */
3134 m
->includes_filehdr
= 1;
3135 m
->includes_phdrs
= 1;
3141 /* Set up a mapping from BFD sections to program segments. */
3144 map_sections_to_segments (abfd
)
3147 asection
**sections
= NULL
;
3151 struct elf_segment_map
*mfirst
;
3152 struct elf_segment_map
**pm
;
3153 struct elf_segment_map
*m
;
3155 unsigned int phdr_index
;
3156 bfd_vma maxpagesize
;
3158 boolean phdr_in_segment
= true;
3161 asection
*first_tls
= NULL
;
3162 asection
*dynsec
, *eh_frame_hdr
;
3165 if (elf_tdata (abfd
)->segment_map
!= NULL
)
3168 if (bfd_count_sections (abfd
) == 0)
3171 /* Select the allocated sections, and sort them. */
3173 amt
= bfd_count_sections (abfd
) * sizeof (asection
*);
3174 sections
= (asection
**) bfd_malloc (amt
);
3175 if (sections
== NULL
)
3179 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
3181 if ((s
->flags
& SEC_ALLOC
) != 0)
3187 BFD_ASSERT (i
<= bfd_count_sections (abfd
));
3190 qsort (sections
, (size_t) count
, sizeof (asection
*), elf_sort_sections
);
3192 /* Build the mapping. */
3197 /* If we have a .interp section, then create a PT_PHDR segment for
3198 the program headers and a PT_INTERP segment for the .interp
3200 s
= bfd_get_section_by_name (abfd
, ".interp");
3201 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0)
3203 amt
= sizeof (struct elf_segment_map
);
3204 m
= (struct elf_segment_map
*) bfd_zalloc (abfd
, amt
);
3208 m
->p_type
= PT_PHDR
;
3209 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
3210 m
->p_flags
= PF_R
| PF_X
;
3211 m
->p_flags_valid
= 1;
3212 m
->includes_phdrs
= 1;
3217 amt
= sizeof (struct elf_segment_map
);
3218 m
= (struct elf_segment_map
*) bfd_zalloc (abfd
, amt
);
3222 m
->p_type
= PT_INTERP
;
3230 /* Look through the sections. We put sections in the same program
3231 segment when the start of the second section can be placed within
3232 a few bytes of the end of the first section. */
3235 maxpagesize
= get_elf_backend_data (abfd
)->maxpagesize
;
3237 dynsec
= bfd_get_section_by_name (abfd
, ".dynamic");
3239 && (dynsec
->flags
& SEC_LOAD
) == 0)
3242 /* Deal with -Ttext or something similar such that the first section
3243 is not adjacent to the program headers. This is an
3244 approximation, since at this point we don't know exactly how many
3245 program headers we will need. */
3248 bfd_size_type phdr_size
;
3250 phdr_size
= elf_tdata (abfd
)->program_header_size
;
3252 phdr_size
= get_elf_backend_data (abfd
)->s
->sizeof_phdr
;
3253 if ((abfd
->flags
& D_PAGED
) == 0
3254 || sections
[0]->lma
< phdr_size
3255 || sections
[0]->lma
% maxpagesize
< phdr_size
% maxpagesize
)
3256 phdr_in_segment
= false;
3259 for (i
= 0, hdrpp
= sections
; i
< count
; i
++, hdrpp
++)
3262 boolean new_segment
;
3266 /* See if this section and the last one will fit in the same
3269 if (last_hdr
== NULL
)
3271 /* If we don't have a segment yet, then we don't need a new
3272 one (we build the last one after this loop). */
3273 new_segment
= false;
3275 else if (last_hdr
->lma
- last_hdr
->vma
!= hdr
->lma
- hdr
->vma
)
3277 /* If this section has a different relation between the
3278 virtual address and the load address, then we need a new
3282 else if (BFD_ALIGN (last_hdr
->lma
+ last_hdr
->_raw_size
, maxpagesize
)
3283 < BFD_ALIGN (hdr
->lma
, maxpagesize
))
3285 /* If putting this section in this segment would force us to
3286 skip a page in the segment, then we need a new segment. */
3289 else if ((last_hdr
->flags
& SEC_LOAD
) == 0
3290 && (hdr
->flags
& SEC_LOAD
) != 0)
3292 /* We don't want to put a loadable section after a
3293 nonloadable section in the same segment. */
3296 else if ((abfd
->flags
& D_PAGED
) == 0)
3298 /* If the file is not demand paged, which means that we
3299 don't require the sections to be correctly aligned in the
3300 file, then there is no other reason for a new segment. */
3301 new_segment
= false;
3304 && (hdr
->flags
& SEC_READONLY
) == 0
3305 && (BFD_ALIGN (last_hdr
->lma
+ last_hdr
->_raw_size
, maxpagesize
)
3308 /* We don't want to put a writable section in a read only
3309 segment, unless they are on the same page in memory
3310 anyhow. We already know that the last section does not
3311 bring us past the current section on the page, so the
3312 only case in which the new section is not on the same
3313 page as the previous section is when the previous section
3314 ends precisely on a page boundary. */
3319 /* Otherwise, we can use the same segment. */
3320 new_segment
= false;
3325 if ((hdr
->flags
& SEC_READONLY
) == 0)
3331 /* We need a new program segment. We must create a new program
3332 header holding all the sections from phdr_index until hdr. */
3334 m
= make_mapping (abfd
, sections
, phdr_index
, i
, phdr_in_segment
);
3341 if ((hdr
->flags
& SEC_READONLY
) == 0)
3348 phdr_in_segment
= false;
3351 /* Create a final PT_LOAD program segment. */
3352 if (last_hdr
!= NULL
)
3354 m
= make_mapping (abfd
, sections
, phdr_index
, i
, phdr_in_segment
);
3362 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
3365 amt
= sizeof (struct elf_segment_map
);
3366 m
= (struct elf_segment_map
*) bfd_zalloc (abfd
, amt
);
3370 m
->p_type
= PT_DYNAMIC
;
3372 m
->sections
[0] = dynsec
;
3378 /* For each loadable .note section, add a PT_NOTE segment. We don't
3379 use bfd_get_section_by_name, because if we link together
3380 nonloadable .note sections and loadable .note sections, we will
3381 generate two .note sections in the output file. FIXME: Using
3382 names for section types is bogus anyhow. */
3383 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
3385 if ((s
->flags
& SEC_LOAD
) != 0
3386 && strncmp (s
->name
, ".note", 5) == 0)
3388 amt
= sizeof (struct elf_segment_map
);
3389 m
= (struct elf_segment_map
*) bfd_zalloc (abfd
, amt
);
3393 m
->p_type
= PT_NOTE
;
3400 if (s
->flags
& SEC_THREAD_LOCAL
)
3408 /* If there are any SHF_TLS output sections, add PT_TLS segment. */
3413 amt
= sizeof (struct elf_segment_map
);
3414 amt
+= (tls_count
- 1) * sizeof (asection
*);
3415 m
= (struct elf_segment_map
*) bfd_zalloc (abfd
, amt
);
3420 m
->count
= tls_count
;
3421 /* Mandated PF_R. */
3423 m
->p_flags_valid
= 1;
3424 for (i
= 0; i
< tls_count
; ++i
)
3426 BFD_ASSERT (first_tls
->flags
& SEC_THREAD_LOCAL
);
3427 m
->sections
[i
] = first_tls
;
3428 first_tls
= first_tls
->next
;
3435 /* If there is a .eh_frame_hdr section, throw in a PT_GNU_EH_FRAME
3437 eh_frame_hdr
= NULL
;
3438 if (elf_tdata (abfd
)->eh_frame_hdr
)
3439 eh_frame_hdr
= bfd_get_section_by_name (abfd
, ".eh_frame_hdr");
3440 if (eh_frame_hdr
!= NULL
&& (eh_frame_hdr
->flags
& SEC_LOAD
))
3442 amt
= sizeof (struct elf_segment_map
);
3443 m
= (struct elf_segment_map
*) bfd_zalloc (abfd
, amt
);
3447 m
->p_type
= PT_GNU_EH_FRAME
;
3449 m
->sections
[0] = eh_frame_hdr
;
3458 elf_tdata (abfd
)->segment_map
= mfirst
;
3462 if (sections
!= NULL
)
3467 /* Sort sections by address. */
3470 elf_sort_sections (arg1
, arg2
)
3474 const asection
*sec1
= *(const asection
**) arg1
;
3475 const asection
*sec2
= *(const asection
**) arg2
;
3477 /* Sort by LMA first, since this is the address used to
3478 place the section into a segment. */
3479 if (sec1
->lma
< sec2
->lma
)
3481 else if (sec1
->lma
> sec2
->lma
)
3484 /* Then sort by VMA. Normally the LMA and the VMA will be
3485 the same, and this will do nothing. */
3486 if (sec1
->vma
< sec2
->vma
)
3488 else if (sec1
->vma
> sec2
->vma
)
3491 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
3493 #define TOEND(x) (((x)->flags & SEC_LOAD) == 0)
3499 /* If the indicies are the same, do not return 0
3500 here, but continue to try the next comparison. */
3501 if (sec1
->target_index
- sec2
->target_index
!= 0)
3502 return sec1
->target_index
- sec2
->target_index
;
3507 else if (TOEND (sec2
))
3512 /* Sort by size, to put zero sized sections
3513 before others at the same address. */
3515 if (sec1
->_raw_size
< sec2
->_raw_size
)
3517 if (sec1
->_raw_size
> sec2
->_raw_size
)
3520 return sec1
->target_index
- sec2
->target_index
;
3523 /* Assign file positions to the sections based on the mapping from
3524 sections to segments. This function also sets up some fields in
3525 the file header, and writes out the program headers. */
3528 assign_file_positions_for_segments (abfd
)
3531 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3533 struct elf_segment_map
*m
;
3535 Elf_Internal_Phdr
*phdrs
;
3537 bfd_vma filehdr_vaddr
, filehdr_paddr
;
3538 bfd_vma phdrs_vaddr
, phdrs_paddr
;
3539 Elf_Internal_Phdr
*p
;
3542 if (elf_tdata (abfd
)->segment_map
== NULL
)
3544 if (! map_sections_to_segments (abfd
))
3549 /* The placement algorithm assumes that non allocated sections are
3550 not in PT_LOAD segments. We ensure this here by removing such
3551 sections from the segment map. */
3552 for (m
= elf_tdata (abfd
)->segment_map
;
3556 unsigned int new_count
;
3559 if (m
->p_type
!= PT_LOAD
)
3563 for (i
= 0; i
< m
->count
; i
++)
3565 if ((m
->sections
[i
]->flags
& SEC_ALLOC
) != 0)
3568 m
->sections
[new_count
] = m
->sections
[i
];
3574 if (new_count
!= m
->count
)
3575 m
->count
= new_count
;
3579 if (bed
->elf_backend_modify_segment_map
)
3581 if (! (*bed
->elf_backend_modify_segment_map
) (abfd
))
3586 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
3589 elf_elfheader (abfd
)->e_phoff
= bed
->s
->sizeof_ehdr
;
3590 elf_elfheader (abfd
)->e_phentsize
= bed
->s
->sizeof_phdr
;
3591 elf_elfheader (abfd
)->e_phnum
= count
;
3596 /* If we already counted the number of program segments, make sure
3597 that we allocated enough space. This happens when SIZEOF_HEADERS
3598 is used in a linker script. */
3599 alloc
= elf_tdata (abfd
)->program_header_size
/ bed
->s
->sizeof_phdr
;
3600 if (alloc
!= 0 && count
> alloc
)
3602 ((*_bfd_error_handler
)
3603 (_("%s: Not enough room for program headers (allocated %u, need %u)"),
3604 bfd_get_filename (abfd
), alloc
, count
));
3605 bfd_set_error (bfd_error_bad_value
);
3612 amt
= alloc
* sizeof (Elf_Internal_Phdr
);
3613 phdrs
= (Elf_Internal_Phdr
*) bfd_alloc (abfd
, amt
);
3617 off
= bed
->s
->sizeof_ehdr
;
3618 off
+= alloc
* bed
->s
->sizeof_phdr
;
3625 for (m
= elf_tdata (abfd
)->segment_map
, p
= phdrs
;
3632 /* If elf_segment_map is not from map_sections_to_segments, the
3633 sections may not be correctly ordered. NOTE: sorting should
3634 not be done to the PT_NOTE section of a corefile, which may
3635 contain several pseudo-sections artificially created by bfd.
3636 Sorting these pseudo-sections breaks things badly. */
3638 && !(elf_elfheader (abfd
)->e_type
== ET_CORE
3639 && m
->p_type
== PT_NOTE
))
3640 qsort (m
->sections
, (size_t) m
->count
, sizeof (asection
*),
3643 p
->p_type
= m
->p_type
;
3644 p
->p_flags
= m
->p_flags
;
3646 if (p
->p_type
== PT_LOAD
3648 && (m
->sections
[0]->flags
& SEC_ALLOC
) != 0)
3650 if ((abfd
->flags
& D_PAGED
) != 0)
3651 off
+= (m
->sections
[0]->vma
- off
) % bed
->maxpagesize
;
3654 bfd_size_type align
;
3657 for (i
= 0, secpp
= m
->sections
; i
< m
->count
; i
++, secpp
++)
3659 bfd_size_type secalign
;
3661 secalign
= bfd_get_section_alignment (abfd
, *secpp
);
3662 if (secalign
> align
)
3666 off
+= (m
->sections
[0]->vma
- off
) % (1 << align
);
3673 p
->p_vaddr
= m
->sections
[0]->vma
;
3675 if (m
->p_paddr_valid
)
3676 p
->p_paddr
= m
->p_paddr
;
3677 else if (m
->count
== 0)
3680 p
->p_paddr
= m
->sections
[0]->lma
;
3682 if (p
->p_type
== PT_LOAD
3683 && (abfd
->flags
& D_PAGED
) != 0)
3684 p
->p_align
= bed
->maxpagesize
;
3685 else if (m
->count
== 0)
3686 p
->p_align
= bed
->s
->file_align
;
3694 if (m
->includes_filehdr
)
3696 if (! m
->p_flags_valid
)
3699 p
->p_filesz
= bed
->s
->sizeof_ehdr
;
3700 p
->p_memsz
= bed
->s
->sizeof_ehdr
;
3703 BFD_ASSERT (p
->p_type
== PT_LOAD
);
3705 if (p
->p_vaddr
< (bfd_vma
) off
)
3707 (*_bfd_error_handler
)
3708 (_("%s: Not enough room for program headers, try linking with -N"),
3709 bfd_get_filename (abfd
));
3710 bfd_set_error (bfd_error_bad_value
);
3715 if (! m
->p_paddr_valid
)
3718 if (p
->p_type
== PT_LOAD
)
3720 filehdr_vaddr
= p
->p_vaddr
;
3721 filehdr_paddr
= p
->p_paddr
;
3725 if (m
->includes_phdrs
)
3727 if (! m
->p_flags_valid
)
3730 if (m
->includes_filehdr
)
3732 if (p
->p_type
== PT_LOAD
)
3734 phdrs_vaddr
= p
->p_vaddr
+ bed
->s
->sizeof_ehdr
;
3735 phdrs_paddr
= p
->p_paddr
+ bed
->s
->sizeof_ehdr
;
3740 p
->p_offset
= bed
->s
->sizeof_ehdr
;
3744 BFD_ASSERT (p
->p_type
== PT_LOAD
);
3745 p
->p_vaddr
-= off
- p
->p_offset
;
3746 if (! m
->p_paddr_valid
)
3747 p
->p_paddr
-= off
- p
->p_offset
;
3750 if (p
->p_type
== PT_LOAD
)
3752 phdrs_vaddr
= p
->p_vaddr
;
3753 phdrs_paddr
= p
->p_paddr
;
3756 phdrs_vaddr
= bed
->maxpagesize
+ bed
->s
->sizeof_ehdr
;
3759 p
->p_filesz
+= alloc
* bed
->s
->sizeof_phdr
;
3760 p
->p_memsz
+= alloc
* bed
->s
->sizeof_phdr
;
3763 if (p
->p_type
== PT_LOAD
3764 || (p
->p_type
== PT_NOTE
&& bfd_get_format (abfd
) == bfd_core
))
3766 if (! m
->includes_filehdr
&& ! m
->includes_phdrs
)
3772 adjust
= off
- (p
->p_offset
+ p
->p_filesz
);
3773 p
->p_filesz
+= adjust
;
3774 p
->p_memsz
+= adjust
;
3780 for (i
= 0, secpp
= m
->sections
; i
< m
->count
; i
++, secpp
++)
3784 bfd_size_type align
;
3788 align
= 1 << bfd_get_section_alignment (abfd
, sec
);
3790 /* The section may have artificial alignment forced by a
3791 link script. Notice this case by the gap between the
3792 cumulative phdr lma and the section's lma. */
3793 if (p
->p_paddr
+ p
->p_memsz
< sec
->lma
)
3795 bfd_vma adjust
= sec
->lma
- (p
->p_paddr
+ p
->p_memsz
);
3797 p
->p_memsz
+= adjust
;
3800 if ((flags
& SEC_LOAD
) != 0)
3801 p
->p_filesz
+= adjust
;
3804 if (p
->p_type
== PT_LOAD
)
3806 bfd_signed_vma adjust
;
3808 if ((flags
& SEC_LOAD
) != 0)
3810 adjust
= sec
->lma
- (p
->p_paddr
+ p
->p_memsz
);
3814 else if ((flags
& SEC_ALLOC
) != 0)
3816 /* The section VMA must equal the file position
3817 modulo the page size. FIXME: I'm not sure if
3818 this adjustment is really necessary. We used to
3819 not have the SEC_LOAD case just above, and then
3820 this was necessary, but now I'm not sure. */
3821 if ((abfd
->flags
& D_PAGED
) != 0)
3822 adjust
= (sec
->vma
- voff
) % bed
->maxpagesize
;
3824 adjust
= (sec
->vma
- voff
) % align
;
3833 (* _bfd_error_handler
) (_("\
3834 Error: First section in segment (%s) starts at 0x%x whereas the segment starts at 0x%x"),
3835 bfd_section_name (abfd
, sec
),
3840 p
->p_memsz
+= adjust
;
3843 if ((flags
& SEC_LOAD
) != 0)
3844 p
->p_filesz
+= adjust
;
3849 /* We check SEC_HAS_CONTENTS here because if NOLOAD is
3850 used in a linker script we may have a section with
3851 SEC_LOAD clear but which is supposed to have
3853 if ((flags
& SEC_LOAD
) != 0
3854 || (flags
& SEC_HAS_CONTENTS
) != 0)
3855 off
+= sec
->_raw_size
;
3857 if ((flags
& SEC_ALLOC
) != 0)
3858 voff
+= sec
->_raw_size
;
3861 if (p
->p_type
== PT_NOTE
&& bfd_get_format (abfd
) == bfd_core
)
3863 /* The actual "note" segment has i == 0.
3864 This is the one that actually contains everything. */
3868 p
->p_filesz
= sec
->_raw_size
;
3869 off
+= sec
->_raw_size
;
3874 /* Fake sections -- don't need to be written. */
3877 flags
= sec
->flags
= 0;
3884 p
->p_memsz
+= sec
->_raw_size
;
3886 if ((flags
& SEC_LOAD
) != 0)
3887 p
->p_filesz
+= sec
->_raw_size
;
3889 if (p
->p_type
== PT_TLS
3890 && sec
->_raw_size
== 0
3891 && (sec
->flags
& SEC_HAS_CONTENTS
) == 0)
3893 struct bfd_link_order
*o
;
3894 bfd_vma tbss_size
= 0;
3896 for (o
= sec
->link_order_head
; o
!= NULL
; o
= o
->next
)
3897 if (tbss_size
< o
->offset
+ o
->size
)
3898 tbss_size
= o
->offset
+ o
->size
;
3900 p
->p_memsz
+= tbss_size
;
3903 if (align
> p
->p_align
3904 && (p
->p_type
!= PT_LOAD
|| (abfd
->flags
& D_PAGED
) == 0))
3908 if (! m
->p_flags_valid
)
3911 if ((flags
& SEC_CODE
) != 0)
3913 if ((flags
& SEC_READONLY
) == 0)
3919 /* Now that we have set the section file positions, we can set up
3920 the file positions for the non PT_LOAD segments. */
3921 for (m
= elf_tdata (abfd
)->segment_map
, p
= phdrs
;
3925 if (p
->p_type
!= PT_LOAD
&& m
->count
> 0)
3927 BFD_ASSERT (! m
->includes_filehdr
&& ! m
->includes_phdrs
);
3928 p
->p_offset
= m
->sections
[0]->filepos
;
3932 if (m
->includes_filehdr
)
3934 p
->p_vaddr
= filehdr_vaddr
;
3935 if (! m
->p_paddr_valid
)
3936 p
->p_paddr
= filehdr_paddr
;
3938 else if (m
->includes_phdrs
)
3940 p
->p_vaddr
= phdrs_vaddr
;
3941 if (! m
->p_paddr_valid
)
3942 p
->p_paddr
= phdrs_paddr
;
3947 /* If additional nonloadable filepos adjustments are required,
3949 if (bed
->set_nonloadable_filepos
)
3950 (*bed
->set_nonloadable_filepos
) (abfd
, phdrs
);
3952 /* Clear out any program headers we allocated but did not use. */
3953 for (; count
< alloc
; count
++, p
++)
3955 memset (p
, 0, sizeof *p
);
3956 p
->p_type
= PT_NULL
;
3959 elf_tdata (abfd
)->phdr
= phdrs
;
3961 elf_tdata (abfd
)->next_file_pos
= off
;
3963 /* Write out the program headers. */
3964 if (bfd_seek (abfd
, (bfd_signed_vma
) bed
->s
->sizeof_ehdr
, SEEK_SET
) != 0
3965 || bed
->s
->write_out_phdrs (abfd
, phdrs
, alloc
) != 0)
3971 /* Get the size of the program header.
3973 If this is called by the linker before any of the section VMA's are set, it
3974 can't calculate the correct value for a strange memory layout. This only
3975 happens when SIZEOF_HEADERS is used in a linker script. In this case,
3976 SORTED_HDRS is NULL and we assume the normal scenario of one text and one
3977 data segment (exclusive of .interp and .dynamic).
3979 ??? User written scripts must either not use SIZEOF_HEADERS, or assume there
3980 will be two segments. */
3982 static bfd_size_type
3983 get_program_header_size (abfd
)
3988 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3990 /* We can't return a different result each time we're called. */
3991 if (elf_tdata (abfd
)->program_header_size
!= 0)
3992 return elf_tdata (abfd
)->program_header_size
;
3994 if (elf_tdata (abfd
)->segment_map
!= NULL
)
3996 struct elf_segment_map
*m
;
3999 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
4001 elf_tdata (abfd
)->program_header_size
= segs
* bed
->s
->sizeof_phdr
;
4002 return elf_tdata (abfd
)->program_header_size
;
4005 /* Assume we will need exactly two PT_LOAD segments: one for text
4006 and one for data. */
4009 s
= bfd_get_section_by_name (abfd
, ".interp");
4010 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0)
4012 /* If we have a loadable interpreter section, we need a
4013 PT_INTERP segment. In this case, assume we also need a
4014 PT_PHDR segment, although that may not be true for all
4019 if (bfd_get_section_by_name (abfd
, ".dynamic") != NULL
)
4021 /* We need a PT_DYNAMIC segment. */
4025 if (elf_tdata (abfd
)->eh_frame_hdr
4026 && bfd_get_section_by_name (abfd
, ".eh_frame_hdr") != NULL
)
4028 /* We need a PT_GNU_EH_FRAME segment. */
4032 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
4034 if ((s
->flags
& SEC_LOAD
) != 0
4035 && strncmp (s
->name
, ".note", 5) == 0)
4037 /* We need a PT_NOTE segment. */
4042 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
4044 if (s
->flags
& SEC_THREAD_LOCAL
)
4046 /* We need a PT_TLS segment. */
4052 /* Let the backend count up any program headers it might need. */
4053 if (bed
->elf_backend_additional_program_headers
)
4057 a
= (*bed
->elf_backend_additional_program_headers
) (abfd
);
4063 elf_tdata (abfd
)->program_header_size
= segs
* bed
->s
->sizeof_phdr
;
4064 return elf_tdata (abfd
)->program_header_size
;
4067 /* Work out the file positions of all the sections. This is called by
4068 _bfd_elf_compute_section_file_positions. All the section sizes and
4069 VMAs must be known before this is called.
4071 We do not consider reloc sections at this point, unless they form
4072 part of the loadable image. Reloc sections are assigned file
4073 positions in assign_file_positions_for_relocs, which is called by
4074 write_object_contents and final_link.
4076 We also don't set the positions of the .symtab and .strtab here. */
4079 assign_file_positions_except_relocs (abfd
)
4082 struct elf_obj_tdata
* const tdata
= elf_tdata (abfd
);
4083 Elf_Internal_Ehdr
* const i_ehdrp
= elf_elfheader (abfd
);
4084 Elf_Internal_Shdr
** const i_shdrpp
= elf_elfsections (abfd
);
4085 unsigned int num_sec
= elf_numsections (abfd
);
4087 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4089 if ((abfd
->flags
& (EXEC_P
| DYNAMIC
)) == 0
4090 && bfd_get_format (abfd
) != bfd_core
)
4092 Elf_Internal_Shdr
**hdrpp
;
4095 /* Start after the ELF header. */
4096 off
= i_ehdrp
->e_ehsize
;
4098 /* We are not creating an executable, which means that we are
4099 not creating a program header, and that the actual order of
4100 the sections in the file is unimportant. */
4101 for (i
= 1, hdrpp
= i_shdrpp
+ 1; i
< num_sec
; i
++, hdrpp
++)
4103 Elf_Internal_Shdr
*hdr
;
4106 if (hdr
->sh_type
== SHT_REL
4107 || hdr
->sh_type
== SHT_RELA
4108 || i
== tdata
->symtab_section
4109 || i
== tdata
->symtab_shndx_section
4110 || i
== tdata
->strtab_section
)
4112 hdr
->sh_offset
= -1;
4115 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, true);
4117 if (i
== SHN_LORESERVE
- 1)
4119 i
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4120 hdrpp
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4127 Elf_Internal_Shdr
**hdrpp
;
4129 /* Assign file positions for the loaded sections based on the
4130 assignment of sections to segments. */
4131 if (! assign_file_positions_for_segments (abfd
))
4134 /* Assign file positions for the other sections. */
4136 off
= elf_tdata (abfd
)->next_file_pos
;
4137 for (i
= 1, hdrpp
= i_shdrpp
+ 1; i
< num_sec
; i
++, hdrpp
++)
4139 Elf_Internal_Shdr
*hdr
;
4142 if (hdr
->bfd_section
!= NULL
4143 && hdr
->bfd_section
->filepos
!= 0)
4144 hdr
->sh_offset
= hdr
->bfd_section
->filepos
;
4145 else if ((hdr
->sh_flags
& SHF_ALLOC
) != 0)
4147 ((*_bfd_error_handler
)
4148 (_("%s: warning: allocated section `%s' not in segment"),
4149 bfd_get_filename (abfd
),
4150 (hdr
->bfd_section
== NULL
4152 : hdr
->bfd_section
->name
)));
4153 if ((abfd
->flags
& D_PAGED
) != 0)
4154 off
+= (hdr
->sh_addr
- off
) % bed
->maxpagesize
;
4156 off
+= (hdr
->sh_addr
- off
) % hdr
->sh_addralign
;
4157 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
,
4160 else if (hdr
->sh_type
== SHT_REL
4161 || hdr
->sh_type
== SHT_RELA
4162 || hdr
== i_shdrpp
[tdata
->symtab_section
]
4163 || hdr
== i_shdrpp
[tdata
->symtab_shndx_section
]
4164 || hdr
== i_shdrpp
[tdata
->strtab_section
])
4165 hdr
->sh_offset
= -1;
4167 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, true);
4169 if (i
== SHN_LORESERVE
- 1)
4171 i
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4172 hdrpp
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4177 /* Place the section headers. */
4178 off
= align_file_position (off
, bed
->s
->file_align
);
4179 i_ehdrp
->e_shoff
= off
;
4180 off
+= i_ehdrp
->e_shnum
* i_ehdrp
->e_shentsize
;
4182 elf_tdata (abfd
)->next_file_pos
= off
;
4191 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
4192 Elf_Internal_Phdr
*i_phdrp
= 0; /* Program header table, internal form */
4193 Elf_Internal_Shdr
**i_shdrp
; /* Section header table, internal form */
4194 struct elf_strtab_hash
*shstrtab
;
4195 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4197 i_ehdrp
= elf_elfheader (abfd
);
4198 i_shdrp
= elf_elfsections (abfd
);
4200 shstrtab
= _bfd_elf_strtab_init ();
4201 if (shstrtab
== NULL
)
4204 elf_shstrtab (abfd
) = shstrtab
;
4206 i_ehdrp
->e_ident
[EI_MAG0
] = ELFMAG0
;
4207 i_ehdrp
->e_ident
[EI_MAG1
] = ELFMAG1
;
4208 i_ehdrp
->e_ident
[EI_MAG2
] = ELFMAG2
;
4209 i_ehdrp
->e_ident
[EI_MAG3
] = ELFMAG3
;
4211 i_ehdrp
->e_ident
[EI_CLASS
] = bed
->s
->elfclass
;
4212 i_ehdrp
->e_ident
[EI_DATA
] =
4213 bfd_big_endian (abfd
) ? ELFDATA2MSB
: ELFDATA2LSB
;
4214 i_ehdrp
->e_ident
[EI_VERSION
] = bed
->s
->ev_current
;
4216 if ((abfd
->flags
& DYNAMIC
) != 0)
4217 i_ehdrp
->e_type
= ET_DYN
;
4218 else if ((abfd
->flags
& EXEC_P
) != 0)
4219 i_ehdrp
->e_type
= ET_EXEC
;
4220 else if (bfd_get_format (abfd
) == bfd_core
)
4221 i_ehdrp
->e_type
= ET_CORE
;
4223 i_ehdrp
->e_type
= ET_REL
;
4225 switch (bfd_get_arch (abfd
))
4227 case bfd_arch_unknown
:
4228 i_ehdrp
->e_machine
= EM_NONE
;
4231 /* There used to be a long list of cases here, each one setting
4232 e_machine to the same EM_* macro #defined as ELF_MACHINE_CODE
4233 in the corresponding bfd definition. To avoid duplication,
4234 the switch was removed. Machines that need special handling
4235 can generally do it in elf_backend_final_write_processing(),
4236 unless they need the information earlier than the final write.
4237 Such need can generally be supplied by replacing the tests for
4238 e_machine with the conditions used to determine it. */
4240 if (get_elf_backend_data (abfd
) != NULL
)
4241 i_ehdrp
->e_machine
= get_elf_backend_data (abfd
)->elf_machine_code
;
4243 i_ehdrp
->e_machine
= EM_NONE
;
4246 i_ehdrp
->e_version
= bed
->s
->ev_current
;
4247 i_ehdrp
->e_ehsize
= bed
->s
->sizeof_ehdr
;
4249 /* No program header, for now. */
4250 i_ehdrp
->e_phoff
= 0;
4251 i_ehdrp
->e_phentsize
= 0;
4252 i_ehdrp
->e_phnum
= 0;
4254 /* Each bfd section is section header entry. */
4255 i_ehdrp
->e_entry
= bfd_get_start_address (abfd
);
4256 i_ehdrp
->e_shentsize
= bed
->s
->sizeof_shdr
;
4258 /* If we're building an executable, we'll need a program header table. */
4259 if (abfd
->flags
& EXEC_P
)
4261 /* It all happens later. */
4263 i_ehdrp
->e_phentsize
= sizeof (Elf_External_Phdr
);
4265 /* elf_build_phdrs() returns a (NULL-terminated) array of
4266 Elf_Internal_Phdrs. */
4267 i_phdrp
= elf_build_phdrs (abfd
, i_ehdrp
, i_shdrp
, &i_ehdrp
->e_phnum
);
4268 i_ehdrp
->e_phoff
= outbase
;
4269 outbase
+= i_ehdrp
->e_phentsize
* i_ehdrp
->e_phnum
;
4274 i_ehdrp
->e_phentsize
= 0;
4276 i_ehdrp
->e_phoff
= 0;
4279 elf_tdata (abfd
)->symtab_hdr
.sh_name
=
4280 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".symtab", false);
4281 elf_tdata (abfd
)->strtab_hdr
.sh_name
=
4282 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".strtab", false);
4283 elf_tdata (abfd
)->shstrtab_hdr
.sh_name
=
4284 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".shstrtab", false);
4285 if (elf_tdata (abfd
)->symtab_hdr
.sh_name
== (unsigned int) -1
4286 || elf_tdata (abfd
)->symtab_hdr
.sh_name
== (unsigned int) -1
4287 || elf_tdata (abfd
)->shstrtab_hdr
.sh_name
== (unsigned int) -1)
4293 /* Assign file positions for all the reloc sections which are not part
4294 of the loadable file image. */
4297 _bfd_elf_assign_file_positions_for_relocs (abfd
)
4301 unsigned int i
, num_sec
;
4302 Elf_Internal_Shdr
**shdrpp
;
4304 off
= elf_tdata (abfd
)->next_file_pos
;
4306 num_sec
= elf_numsections (abfd
);
4307 for (i
= 1, shdrpp
= elf_elfsections (abfd
) + 1; i
< num_sec
; i
++, shdrpp
++)
4309 Elf_Internal_Shdr
*shdrp
;
4312 if ((shdrp
->sh_type
== SHT_REL
|| shdrp
->sh_type
== SHT_RELA
)
4313 && shdrp
->sh_offset
== -1)
4314 off
= _bfd_elf_assign_file_position_for_section (shdrp
, off
, true);
4317 elf_tdata (abfd
)->next_file_pos
= off
;
4321 _bfd_elf_write_object_contents (abfd
)
4324 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4325 Elf_Internal_Ehdr
*i_ehdrp
;
4326 Elf_Internal_Shdr
**i_shdrp
;
4328 unsigned int count
, num_sec
;
4330 if (! abfd
->output_has_begun
4331 && ! _bfd_elf_compute_section_file_positions
4332 (abfd
, (struct bfd_link_info
*) NULL
))
4335 i_shdrp
= elf_elfsections (abfd
);
4336 i_ehdrp
= elf_elfheader (abfd
);
4339 bfd_map_over_sections (abfd
, bed
->s
->write_relocs
, &failed
);
4343 _bfd_elf_assign_file_positions_for_relocs (abfd
);
4345 /* After writing the headers, we need to write the sections too... */
4346 num_sec
= elf_numsections (abfd
);
4347 for (count
= 1; count
< num_sec
; count
++)
4349 if (bed
->elf_backend_section_processing
)
4350 (*bed
->elf_backend_section_processing
) (abfd
, i_shdrp
[count
]);
4351 if (i_shdrp
[count
]->contents
)
4353 bfd_size_type amt
= i_shdrp
[count
]->sh_size
;
4355 if (bfd_seek (abfd
, i_shdrp
[count
]->sh_offset
, SEEK_SET
) != 0
4356 || bfd_bwrite (i_shdrp
[count
]->contents
, amt
, abfd
) != amt
)
4359 if (count
== SHN_LORESERVE
- 1)
4360 count
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4363 /* Write out the section header names. */
4364 if (bfd_seek (abfd
, elf_tdata (abfd
)->shstrtab_hdr
.sh_offset
, SEEK_SET
) != 0
4365 || ! _bfd_elf_strtab_emit (abfd
, elf_shstrtab (abfd
)))
4368 if (bed
->elf_backend_final_write_processing
)
4369 (*bed
->elf_backend_final_write_processing
) (abfd
,
4370 elf_tdata (abfd
)->linker
);
4372 return bed
->s
->write_shdrs_and_ehdr (abfd
);
4376 _bfd_elf_write_corefile_contents (abfd
)
4379 /* Hopefully this can be done just like an object file. */
4380 return _bfd_elf_write_object_contents (abfd
);
4383 /* Given a section, search the header to find them. */
4386 _bfd_elf_section_from_bfd_section (abfd
, asect
)
4390 struct elf_backend_data
*bed
;
4393 if (elf_section_data (asect
) != NULL
4394 && elf_section_data (asect
)->this_idx
!= 0)
4395 return elf_section_data (asect
)->this_idx
;
4397 if (bfd_is_abs_section (asect
))
4399 else if (bfd_is_com_section (asect
))
4401 else if (bfd_is_und_section (asect
))
4405 Elf_Internal_Shdr
**i_shdrp
= elf_elfsections (abfd
);
4406 int maxindex
= elf_numsections (abfd
);
4408 for (index
= 1; index
< maxindex
; index
++)
4410 Elf_Internal_Shdr
*hdr
= i_shdrp
[index
];
4412 if (hdr
!= NULL
&& hdr
->bfd_section
== asect
)
4418 bed
= get_elf_backend_data (abfd
);
4419 if (bed
->elf_backend_section_from_bfd_section
)
4423 if ((*bed
->elf_backend_section_from_bfd_section
) (abfd
, asect
, &retval
))
4428 bfd_set_error (bfd_error_nonrepresentable_section
);
4433 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
4437 _bfd_elf_symbol_from_bfd_symbol (abfd
, asym_ptr_ptr
)
4439 asymbol
**asym_ptr_ptr
;
4441 asymbol
*asym_ptr
= *asym_ptr_ptr
;
4443 flagword flags
= asym_ptr
->flags
;
4445 /* When gas creates relocations against local labels, it creates its
4446 own symbol for the section, but does put the symbol into the
4447 symbol chain, so udata is 0. When the linker is generating
4448 relocatable output, this section symbol may be for one of the
4449 input sections rather than the output section. */
4450 if (asym_ptr
->udata
.i
== 0
4451 && (flags
& BSF_SECTION_SYM
)
4452 && asym_ptr
->section
)
4456 if (asym_ptr
->section
->output_section
!= NULL
)
4457 indx
= asym_ptr
->section
->output_section
->index
;
4459 indx
= asym_ptr
->section
->index
;
4460 if (indx
< elf_num_section_syms (abfd
)
4461 && elf_section_syms (abfd
)[indx
] != NULL
)
4462 asym_ptr
->udata
.i
= elf_section_syms (abfd
)[indx
]->udata
.i
;
4465 idx
= asym_ptr
->udata
.i
;
4469 /* This case can occur when using --strip-symbol on a symbol
4470 which is used in a relocation entry. */
4471 (*_bfd_error_handler
)
4472 (_("%s: symbol `%s' required but not present"),
4473 bfd_archive_filename (abfd
), bfd_asymbol_name (asym_ptr
));
4474 bfd_set_error (bfd_error_no_symbols
);
4481 "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n",
4482 (long) asym_ptr
, asym_ptr
->name
, idx
, flags
,
4483 elf_symbol_flags (flags
));
4491 /* Copy private BFD data. This copies any program header information. */
4494 copy_private_bfd_data (ibfd
, obfd
)
4498 Elf_Internal_Ehdr
* iehdr
;
4499 struct elf_segment_map
* map
;
4500 struct elf_segment_map
* map_first
;
4501 struct elf_segment_map
** pointer_to_map
;
4502 Elf_Internal_Phdr
* segment
;
4505 unsigned int num_segments
;
4506 boolean phdr_included
= false;
4507 bfd_vma maxpagesize
;
4508 struct elf_segment_map
* phdr_adjust_seg
= NULL
;
4509 unsigned int phdr_adjust_num
= 0;
4510 struct elf_backend_data
* bed
;
4512 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
4513 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
4516 if (elf_tdata (ibfd
)->phdr
== NULL
)
4519 bed
= get_elf_backend_data (ibfd
);
4520 iehdr
= elf_elfheader (ibfd
);
4523 pointer_to_map
= &map_first
;
4525 num_segments
= elf_elfheader (ibfd
)->e_phnum
;
4526 maxpagesize
= get_elf_backend_data (obfd
)->maxpagesize
;
4528 /* Returns the end address of the segment + 1. */
4529 #define SEGMENT_END(segment, start) \
4530 (start + (segment->p_memsz > segment->p_filesz \
4531 ? segment->p_memsz : segment->p_filesz))
4533 /* Returns true if the given section is contained within
4534 the given segment. VMA addresses are compared. */
4535 #define IS_CONTAINED_BY_VMA(section, segment) \
4536 (section->vma >= segment->p_vaddr \
4537 && (section->vma + section->_raw_size \
4538 <= (SEGMENT_END (segment, segment->p_vaddr))))
4540 /* Returns true if the given section is contained within
4541 the given segment. LMA addresses are compared. */
4542 #define IS_CONTAINED_BY_LMA(section, segment, base) \
4543 (section->lma >= base \
4544 && (section->lma + section->_raw_size \
4545 <= SEGMENT_END (segment, base)))
4547 /* Returns true if the given section is contained within the
4548 given segment. Filepos addresses are compared in an elf
4549 backend function. */
4550 #define IS_CONTAINED_BY_FILEPOS(sec, seg, bed) \
4551 (bed->is_contained_by_filepos \
4552 && (*bed->is_contained_by_filepos) (sec, seg))
4554 /* Special case: corefile "NOTE" section containing regs, prpsinfo etc. */
4555 #define IS_COREFILE_NOTE(p, s) \
4556 (p->p_type == PT_NOTE \
4557 && bfd_get_format (ibfd) == bfd_core \
4558 && s->vma == 0 && s->lma == 0 \
4559 && (bfd_vma) s->filepos >= p->p_offset \
4560 && ((bfd_vma) s->filepos + s->_raw_size \
4561 <= p->p_offset + p->p_filesz))
4563 /* The complicated case when p_vaddr is 0 is to handle the Solaris
4564 linker, which generates a PT_INTERP section with p_vaddr and
4565 p_memsz set to 0. */
4566 #define IS_SOLARIS_PT_INTERP(p, s) \
4568 && p->p_paddr == 0 \
4569 && p->p_memsz == 0 \
4570 && p->p_filesz > 0 \
4571 && (s->flags & SEC_HAS_CONTENTS) != 0 \
4572 && s->_raw_size > 0 \
4573 && (bfd_vma) s->filepos >= p->p_offset \
4574 && ((bfd_vma) s->filepos + s->_raw_size \
4575 <= p->p_offset + p->p_filesz))
4577 /* Decide if the given section should be included in the given segment.
4578 A section will be included if:
4579 1. It is within the address space of the segment -- we use the LMA
4580 if that is set for the segment and the VMA otherwise,
4581 2. It is an allocated segment,
4582 3. There is an output section associated with it,
4583 4. The section has not already been allocated to a previous segment. */
4584 #define INCLUDE_SECTION_IN_SEGMENT(section, segment, bed) \
4585 ((((segment->p_paddr \
4586 ? IS_CONTAINED_BY_LMA (section, segment, segment->p_paddr) \
4587 : IS_CONTAINED_BY_VMA (section, segment)) \
4588 && (section->flags & SEC_ALLOC) != 0) \
4589 || IS_COREFILE_NOTE (segment, section) \
4590 || (IS_CONTAINED_BY_FILEPOS (section, segment, bed) \
4591 && (section->flags & SEC_ALLOC) == 0)) \
4592 && section->output_section != NULL \
4593 && ! section->segment_mark)
4595 /* Returns true iff seg1 starts after the end of seg2. */
4596 #define SEGMENT_AFTER_SEGMENT(seg1, seg2) \
4597 (seg1->p_vaddr >= SEGMENT_END (seg2, seg2->p_vaddr))
4599 /* Returns true iff seg1 and seg2 overlap. */
4600 #define SEGMENT_OVERLAPS(seg1, seg2) \
4601 (!(SEGMENT_AFTER_SEGMENT (seg1, seg2) \
4602 || SEGMENT_AFTER_SEGMENT (seg2, seg1)))
4604 /* Initialise the segment mark field. */
4605 for (section
= ibfd
->sections
; section
!= NULL
; section
= section
->next
)
4606 section
->segment_mark
= false;
4608 /* Scan through the segments specified in the program header
4609 of the input BFD. For this first scan we look for overlaps
4610 in the loadable segments. These can be created by weird
4611 parameters to objcopy. Also, fix some solaris weirdness. */
4612 for (i
= 0, segment
= elf_tdata (ibfd
)->phdr
;
4617 Elf_Internal_Phdr
*segment2
;
4619 if (segment
->p_type
== PT_INTERP
)
4620 for (section
= ibfd
->sections
; section
; section
= section
->next
)
4621 if (IS_SOLARIS_PT_INTERP (segment
, section
))
4623 /* Mininal change so that the normal section to segment
4624 assigment code will work. */
4625 segment
->p_vaddr
= section
->vma
;
4629 if (segment
->p_type
!= PT_LOAD
)
4632 /* Determine if this segment overlaps any previous segments. */
4633 for (j
= 0, segment2
= elf_tdata (ibfd
)->phdr
; j
< i
; j
++, segment2
++)
4635 bfd_signed_vma extra_length
;
4637 if (segment2
->p_type
!= PT_LOAD
4638 || ! SEGMENT_OVERLAPS (segment
, segment2
))
4641 /* Merge the two segments together. */
4642 if (segment2
->p_vaddr
< segment
->p_vaddr
)
4644 /* Extend SEGMENT2 to include SEGMENT and then delete
4647 SEGMENT_END (segment
, segment
->p_vaddr
)
4648 - SEGMENT_END (segment2
, segment2
->p_vaddr
);
4650 if (extra_length
> 0)
4652 segment2
->p_memsz
+= extra_length
;
4653 segment2
->p_filesz
+= extra_length
;
4656 segment
->p_type
= PT_NULL
;
4658 /* Since we have deleted P we must restart the outer loop. */
4660 segment
= elf_tdata (ibfd
)->phdr
;
4665 /* Extend SEGMENT to include SEGMENT2 and then delete
4668 SEGMENT_END (segment2
, segment2
->p_vaddr
)
4669 - SEGMENT_END (segment
, segment
->p_vaddr
);
4671 if (extra_length
> 0)
4673 segment
->p_memsz
+= extra_length
;
4674 segment
->p_filesz
+= extra_length
;
4677 segment2
->p_type
= PT_NULL
;
4682 /* The second scan attempts to assign sections to segments. */
4683 for (i
= 0, segment
= elf_tdata (ibfd
)->phdr
;
4687 unsigned int section_count
;
4688 asection
** sections
;
4689 asection
* output_section
;
4691 bfd_vma matching_lma
;
4692 bfd_vma suggested_lma
;
4696 if (segment
->p_type
== PT_NULL
)
4699 /* Compute how many sections might be placed into this segment. */
4701 for (section
= ibfd
->sections
; section
!= NULL
; section
= section
->next
)
4702 if (INCLUDE_SECTION_IN_SEGMENT (section
, segment
, bed
))
4705 /* Allocate a segment map big enough to contain all of the
4706 sections we have selected. */
4707 amt
= sizeof (struct elf_segment_map
);
4708 amt
+= ((bfd_size_type
) section_count
- 1) * sizeof (asection
*);
4709 map
= (struct elf_segment_map
*) bfd_alloc (obfd
, amt
);
4713 /* Initialise the fields of the segment map. Default to
4714 using the physical address of the segment in the input BFD. */
4716 map
->p_type
= segment
->p_type
;
4717 map
->p_flags
= segment
->p_flags
;
4718 map
->p_flags_valid
= 1;
4719 map
->p_paddr
= segment
->p_paddr
;
4720 map
->p_paddr_valid
= 1;
4722 /* Determine if this segment contains the ELF file header
4723 and if it contains the program headers themselves. */
4724 map
->includes_filehdr
= (segment
->p_offset
== 0
4725 && segment
->p_filesz
>= iehdr
->e_ehsize
);
4727 map
->includes_phdrs
= 0;
4729 if (! phdr_included
|| segment
->p_type
!= PT_LOAD
)
4731 map
->includes_phdrs
=
4732 (segment
->p_offset
<= (bfd_vma
) iehdr
->e_phoff
4733 && (segment
->p_offset
+ segment
->p_filesz
4734 >= ((bfd_vma
) iehdr
->e_phoff
4735 + iehdr
->e_phnum
* iehdr
->e_phentsize
)));
4737 if (segment
->p_type
== PT_LOAD
&& map
->includes_phdrs
)
4738 phdr_included
= true;
4741 if (section_count
== 0)
4743 /* Special segments, such as the PT_PHDR segment, may contain
4744 no sections, but ordinary, loadable segments should contain
4745 something. They are allowed by the ELF spec however, so only
4746 a warning is produced. */
4747 if (segment
->p_type
== PT_LOAD
)
4748 (*_bfd_error_handler
)
4749 (_("%s: warning: Empty loadable segment detected, is this intentional ?\n"),
4750 bfd_archive_filename (ibfd
));
4753 *pointer_to_map
= map
;
4754 pointer_to_map
= &map
->next
;
4759 /* Now scan the sections in the input BFD again and attempt
4760 to add their corresponding output sections to the segment map.
4761 The problem here is how to handle an output section which has
4762 been moved (ie had its LMA changed). There are four possibilities:
4764 1. None of the sections have been moved.
4765 In this case we can continue to use the segment LMA from the
4768 2. All of the sections have been moved by the same amount.
4769 In this case we can change the segment's LMA to match the LMA
4770 of the first section.
4772 3. Some of the sections have been moved, others have not.
4773 In this case those sections which have not been moved can be
4774 placed in the current segment which will have to have its size,
4775 and possibly its LMA changed, and a new segment or segments will
4776 have to be created to contain the other sections.
4778 4. The sections have been moved, but not be the same amount.
4779 In this case we can change the segment's LMA to match the LMA
4780 of the first section and we will have to create a new segment
4781 or segments to contain the other sections.
4783 In order to save time, we allocate an array to hold the section
4784 pointers that we are interested in. As these sections get assigned
4785 to a segment, they are removed from this array. */
4787 /* Gcc 2.96 miscompiles this code on mips. Don't do casting here
4788 to work around this long long bug. */
4789 amt
= section_count
* sizeof (asection
*);
4790 sections
= (asection
**) bfd_malloc (amt
);
4791 if (sections
== NULL
)
4794 /* Step One: Scan for segment vs section LMA conflicts.
4795 Also add the sections to the section array allocated above.
4796 Also add the sections to the current segment. In the common
4797 case, where the sections have not been moved, this means that
4798 we have completely filled the segment, and there is nothing
4804 for (j
= 0, section
= ibfd
->sections
;
4806 section
= section
->next
)
4808 if (INCLUDE_SECTION_IN_SEGMENT (section
, segment
, bed
))
4810 output_section
= section
->output_section
;
4812 sections
[j
++] = section
;
4814 /* The Solaris native linker always sets p_paddr to 0.
4815 We try to catch that case here, and set it to the
4816 correct value. Note - some backends require that
4817 p_paddr be left as zero. */
4818 if (segment
->p_paddr
== 0
4819 && (! bed
->want_p_paddr_set_to_zero
)
4821 && output_section
->lma
!= 0
4822 && (output_section
->vma
== (segment
->p_vaddr
4823 + (map
->includes_filehdr
4826 + (map
->includes_phdrs
4828 * iehdr
->e_phentsize
)
4830 map
->p_paddr
= segment
->p_vaddr
;
4832 /* Match up the physical address of the segment with the
4833 LMA address of the output section. */
4834 if (IS_CONTAINED_BY_LMA (output_section
, segment
, map
->p_paddr
)
4835 || IS_CONTAINED_BY_FILEPOS (section
, segment
, bed
)
4836 || IS_COREFILE_NOTE (segment
, section
)
4837 || (bed
->want_p_paddr_set_to_zero
&&
4838 IS_CONTAINED_BY_VMA (output_section
, segment
))
4841 if (matching_lma
== 0)
4842 matching_lma
= output_section
->lma
;
4844 /* We assume that if the section fits within the segment
4845 then it does not overlap any other section within that
4847 map
->sections
[isec
++] = output_section
;
4849 else if (suggested_lma
== 0)
4850 suggested_lma
= output_section
->lma
;
4854 BFD_ASSERT (j
== section_count
);
4856 /* Step Two: Adjust the physical address of the current segment,
4858 if (isec
== section_count
)
4860 /* All of the sections fitted within the segment as currently
4861 specified. This is the default case. Add the segment to
4862 the list of built segments and carry on to process the next
4863 program header in the input BFD. */
4864 map
->count
= section_count
;
4865 *pointer_to_map
= map
;
4866 pointer_to_map
= &map
->next
;
4873 if (matching_lma
!= 0)
4875 /* At least one section fits inside the current segment.
4876 Keep it, but modify its physical address to match the
4877 LMA of the first section that fitted. */
4878 map
->p_paddr
= matching_lma
;
4882 /* None of the sections fitted inside the current segment.
4883 Change the current segment's physical address to match
4884 the LMA of the first section. */
4885 map
->p_paddr
= suggested_lma
;
4888 /* Offset the segment physical address from the lma
4889 to allow for space taken up by elf headers. */
4890 if (map
->includes_filehdr
)
4891 map
->p_paddr
-= iehdr
->e_ehsize
;
4893 if (map
->includes_phdrs
)
4895 map
->p_paddr
-= iehdr
->e_phnum
* iehdr
->e_phentsize
;
4897 /* iehdr->e_phnum is just an estimate of the number
4898 of program headers that we will need. Make a note
4899 here of the number we used and the segment we chose
4900 to hold these headers, so that we can adjust the
4901 offset when we know the correct value. */
4902 phdr_adjust_num
= iehdr
->e_phnum
;
4903 phdr_adjust_seg
= map
;
4907 /* Step Three: Loop over the sections again, this time assigning
4908 those that fit to the current segment and removing them from the
4909 sections array; but making sure not to leave large gaps. Once all
4910 possible sections have been assigned to the current segment it is
4911 added to the list of built segments and if sections still remain
4912 to be assigned, a new segment is constructed before repeating
4920 /* Fill the current segment with sections that fit. */
4921 for (j
= 0; j
< section_count
; j
++)
4923 section
= sections
[j
];
4925 if (section
== NULL
)
4928 output_section
= section
->output_section
;
4930 BFD_ASSERT (output_section
!= NULL
);
4932 if (IS_CONTAINED_BY_LMA (output_section
, segment
, map
->p_paddr
)
4933 || IS_COREFILE_NOTE (segment
, section
))
4935 if (map
->count
== 0)
4937 /* If the first section in a segment does not start at
4938 the beginning of the segment, then something is
4940 if (output_section
->lma
!=
4942 + (map
->includes_filehdr
? iehdr
->e_ehsize
: 0)
4943 + (map
->includes_phdrs
4944 ? iehdr
->e_phnum
* iehdr
->e_phentsize
4950 asection
* prev_sec
;
4952 prev_sec
= map
->sections
[map
->count
- 1];
4954 /* If the gap between the end of the previous section
4955 and the start of this section is more than
4956 maxpagesize then we need to start a new segment. */
4957 if ((BFD_ALIGN (prev_sec
->lma
+ prev_sec
->_raw_size
,
4959 < BFD_ALIGN (output_section
->lma
, maxpagesize
))
4960 || ((prev_sec
->lma
+ prev_sec
->_raw_size
)
4961 > output_section
->lma
))
4963 if (suggested_lma
== 0)
4964 suggested_lma
= output_section
->lma
;
4970 map
->sections
[map
->count
++] = output_section
;
4973 section
->segment_mark
= true;
4975 else if (suggested_lma
== 0)
4976 suggested_lma
= output_section
->lma
;
4979 BFD_ASSERT (map
->count
> 0);
4981 /* Add the current segment to the list of built segments. */
4982 *pointer_to_map
= map
;
4983 pointer_to_map
= &map
->next
;
4985 if (isec
< section_count
)
4987 /* We still have not allocated all of the sections to
4988 segments. Create a new segment here, initialise it
4989 and carry on looping. */
4990 amt
= sizeof (struct elf_segment_map
);
4991 amt
+= ((bfd_size_type
) section_count
- 1) * sizeof (asection
*);
4992 map
= (struct elf_segment_map
*) bfd_alloc (obfd
, amt
);
4996 /* Initialise the fields of the segment map. Set the physical
4997 physical address to the LMA of the first section that has
4998 not yet been assigned. */
5000 map
->p_type
= segment
->p_type
;
5001 map
->p_flags
= segment
->p_flags
;
5002 map
->p_flags_valid
= 1;
5003 map
->p_paddr
= suggested_lma
;
5004 map
->p_paddr_valid
= 1;
5005 map
->includes_filehdr
= 0;
5006 map
->includes_phdrs
= 0;
5009 while (isec
< section_count
);
5014 /* The Solaris linker creates program headers in which all the
5015 p_paddr fields are zero. When we try to objcopy or strip such a
5016 file, we get confused. Check for this case, and if we find it
5017 reset the p_paddr_valid fields. */
5018 for (map
= map_first
; map
!= NULL
; map
= map
->next
)
5019 if (map
->p_paddr
!= 0)
5023 for (map
= map_first
; map
!= NULL
; map
= map
->next
)
5024 map
->p_paddr_valid
= 0;
5027 elf_tdata (obfd
)->segment_map
= map_first
;
5029 /* If we had to estimate the number of program headers that were
5030 going to be needed, then check our estimate now and adjust
5031 the offset if necessary. */
5032 if (phdr_adjust_seg
!= NULL
)
5036 for (count
= 0, map
= map_first
; map
!= NULL
; map
= map
->next
)
5039 if (count
> phdr_adjust_num
)
5040 phdr_adjust_seg
->p_paddr
5041 -= (count
- phdr_adjust_num
) * iehdr
->e_phentsize
;
5045 /* Final Step: Sort the segments into ascending order of physical
5047 if (map_first
!= NULL
)
5049 struct elf_segment_map
*prev
;
5052 for (map
= map_first
->next
; map
!= NULL
; prev
= map
, map
= map
->next
)
5054 /* Yes I know - its a bubble sort.... */
5055 if (map
->next
!= NULL
&& (map
->next
->p_paddr
< map
->p_paddr
))
5057 /* Swap map and map->next. */
5058 prev
->next
= map
->next
;
5059 map
->next
= map
->next
->next
;
5060 prev
->next
->next
= map
;
5070 #undef IS_CONTAINED_BY_VMA
5071 #undef IS_CONTAINED_BY_LMA
5072 #undef IS_CONTAINED_BY_FILEPOS
5073 #undef IS_COREFILE_NOTE
5074 #undef IS_SOLARIS_PT_INTERP
5075 #undef INCLUDE_SECTION_IN_SEGMENT
5076 #undef SEGMENT_AFTER_SEGMENT
5077 #undef SEGMENT_OVERLAPS
5081 /* Copy private section information. This copies over the entsize
5082 field, and sometimes the info field. */
5085 _bfd_elf_copy_private_section_data (ibfd
, isec
, obfd
, osec
)
5091 Elf_Internal_Shdr
*ihdr
, *ohdr
;
5092 const struct elf_backend_data
*bed
= get_elf_backend_data (ibfd
);
5094 if (ibfd
->xvec
->flavour
!= bfd_target_elf_flavour
5095 || obfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
5098 /* Copy over private BFD data if it has not already been copied.
5099 This must be done here, rather than in the copy_private_bfd_data
5100 entry point, because the latter is called after the section
5101 contents have been set, which means that the program headers have
5102 already been worked out. The backend function provides a way to
5103 override the test conditions and code path for the call to
5104 copy_private_bfd_data. */
5105 if (bed
->copy_private_bfd_data_p
)
5107 if ((*bed
->copy_private_bfd_data_p
) (ibfd
, isec
, obfd
, osec
))
5108 if (! copy_private_bfd_data (ibfd
, obfd
))
5111 else if (elf_tdata (obfd
)->segment_map
== NULL
&& elf_tdata (ibfd
)->phdr
!= NULL
)
5115 /* Only set up the segments if there are no more SEC_ALLOC
5116 sections. FIXME: This won't do the right thing if objcopy is
5117 used to remove the last SEC_ALLOC section, since objcopy
5118 won't call this routine in that case. */
5119 for (s
= isec
->next
; s
!= NULL
; s
= s
->next
)
5120 if ((s
->flags
& SEC_ALLOC
) != 0)
5124 if (! copy_private_bfd_data (ibfd
, obfd
))
5129 ihdr
= &elf_section_data (isec
)->this_hdr
;
5130 ohdr
= &elf_section_data (osec
)->this_hdr
;
5132 ohdr
->sh_entsize
= ihdr
->sh_entsize
;
5134 if (ihdr
->sh_type
== SHT_SYMTAB
5135 || ihdr
->sh_type
== SHT_DYNSYM
5136 || ihdr
->sh_type
== SHT_GNU_verneed
5137 || ihdr
->sh_type
== SHT_GNU_verdef
)
5138 ohdr
->sh_info
= ihdr
->sh_info
;
5140 /* Set things up for objcopy. The output SHT_GROUP section will
5141 have its elf_next_in_group pointing back to the input group
5143 elf_next_in_group (osec
) = elf_next_in_group (isec
);
5144 elf_group_name (osec
) = elf_group_name (isec
);
5146 elf_section_data (osec
)->use_rela_p
5147 = elf_section_data (isec
)->use_rela_p
;
5152 /* Copy private symbol information. If this symbol is in a section
5153 which we did not map into a BFD section, try to map the section
5154 index correctly. We use special macro definitions for the mapped
5155 section indices; these definitions are interpreted by the
5156 swap_out_syms function. */
5158 #define MAP_ONESYMTAB (SHN_HIOS + 1)
5159 #define MAP_DYNSYMTAB (SHN_HIOS + 2)
5160 #define MAP_STRTAB (SHN_HIOS + 3)
5161 #define MAP_SHSTRTAB (SHN_HIOS + 4)
5162 #define MAP_SYM_SHNDX (SHN_HIOS + 5)
5165 _bfd_elf_copy_private_symbol_data (ibfd
, isymarg
, obfd
, osymarg
)
5171 elf_symbol_type
*isym
, *osym
;
5173 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
5174 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
5177 isym
= elf_symbol_from (ibfd
, isymarg
);
5178 osym
= elf_symbol_from (obfd
, osymarg
);
5182 && bfd_is_abs_section (isym
->symbol
.section
))
5186 shndx
= isym
->internal_elf_sym
.st_shndx
;
5187 if (shndx
== elf_onesymtab (ibfd
))
5188 shndx
= MAP_ONESYMTAB
;
5189 else if (shndx
== elf_dynsymtab (ibfd
))
5190 shndx
= MAP_DYNSYMTAB
;
5191 else if (shndx
== elf_tdata (ibfd
)->strtab_section
)
5193 else if (shndx
== elf_tdata (ibfd
)->shstrtab_section
)
5194 shndx
= MAP_SHSTRTAB
;
5195 else if (shndx
== elf_tdata (ibfd
)->symtab_shndx_section
)
5196 shndx
= MAP_SYM_SHNDX
;
5197 osym
->internal_elf_sym
.st_shndx
= shndx
;
5203 /* Swap out the symbols. */
5206 swap_out_syms (abfd
, sttp
, relocatable_p
)
5208 struct bfd_strtab_hash
**sttp
;
5211 struct elf_backend_data
*bed
;
5214 struct bfd_strtab_hash
*stt
;
5215 Elf_Internal_Shdr
*symtab_hdr
;
5216 Elf_Internal_Shdr
*symtab_shndx_hdr
;
5217 Elf_Internal_Shdr
*symstrtab_hdr
;
5218 char *outbound_syms
;
5219 char *outbound_shndx
;
5223 if (!elf_map_symbols (abfd
))
5226 /* Dump out the symtabs. */
5227 stt
= _bfd_elf_stringtab_init ();
5231 bed
= get_elf_backend_data (abfd
);
5232 symcount
= bfd_get_symcount (abfd
);
5233 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
5234 symtab_hdr
->sh_type
= SHT_SYMTAB
;
5235 symtab_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
5236 symtab_hdr
->sh_size
= symtab_hdr
->sh_entsize
* (symcount
+ 1);
5237 symtab_hdr
->sh_info
= elf_num_locals (abfd
) + 1;
5238 symtab_hdr
->sh_addralign
= bed
->s
->file_align
;
5240 symstrtab_hdr
= &elf_tdata (abfd
)->strtab_hdr
;
5241 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
5243 amt
= (bfd_size_type
) (1 + symcount
) * bed
->s
->sizeof_sym
;
5244 outbound_syms
= bfd_alloc (abfd
, amt
);
5245 if (outbound_syms
== NULL
)
5247 symtab_hdr
->contents
= (PTR
) outbound_syms
;
5249 outbound_shndx
= NULL
;
5250 symtab_shndx_hdr
= &elf_tdata (abfd
)->symtab_shndx_hdr
;
5251 if (symtab_shndx_hdr
->sh_name
!= 0)
5253 amt
= (bfd_size_type
) (1 + symcount
) * sizeof (Elf_External_Sym_Shndx
);
5254 outbound_shndx
= bfd_zalloc (abfd
, amt
);
5255 if (outbound_shndx
== NULL
)
5257 symtab_shndx_hdr
->contents
= outbound_shndx
;
5258 symtab_shndx_hdr
->sh_type
= SHT_SYMTAB_SHNDX
;
5259 symtab_shndx_hdr
->sh_size
= amt
;
5260 symtab_shndx_hdr
->sh_addralign
= sizeof (Elf_External_Sym_Shndx
);
5261 symtab_shndx_hdr
->sh_entsize
= sizeof (Elf_External_Sym_Shndx
);
5264 /* now generate the data (for "contents") */
5266 /* Fill in zeroth symbol and swap it out. */
5267 Elf_Internal_Sym sym
;
5273 sym
.st_shndx
= SHN_UNDEF
;
5274 bed
->s
->swap_symbol_out (abfd
, &sym
, outbound_syms
, outbound_shndx
);
5275 outbound_syms
+= bed
->s
->sizeof_sym
;
5276 if (outbound_shndx
!= NULL
)
5277 outbound_shndx
+= sizeof (Elf_External_Sym_Shndx
);
5280 syms
= bfd_get_outsymbols (abfd
);
5281 for (idx
= 0; idx
< symcount
; idx
++)
5283 Elf_Internal_Sym sym
;
5284 bfd_vma value
= syms
[idx
]->value
;
5285 elf_symbol_type
*type_ptr
;
5286 flagword flags
= syms
[idx
]->flags
;
5289 if ((flags
& (BSF_SECTION_SYM
| BSF_GLOBAL
)) == BSF_SECTION_SYM
)
5291 /* Local section symbols have no name. */
5296 sym
.st_name
= (unsigned long) _bfd_stringtab_add (stt
,
5299 if (sym
.st_name
== (unsigned long) -1)
5303 type_ptr
= elf_symbol_from (abfd
, syms
[idx
]);
5305 if ((flags
& BSF_SECTION_SYM
) == 0
5306 && bfd_is_com_section (syms
[idx
]->section
))
5308 /* ELF common symbols put the alignment into the `value' field,
5309 and the size into the `size' field. This is backwards from
5310 how BFD handles it, so reverse it here. */
5311 sym
.st_size
= value
;
5312 if (type_ptr
== NULL
5313 || type_ptr
->internal_elf_sym
.st_value
== 0)
5314 sym
.st_value
= value
>= 16 ? 16 : (1 << bfd_log2 (value
));
5316 sym
.st_value
= type_ptr
->internal_elf_sym
.st_value
;
5317 sym
.st_shndx
= _bfd_elf_section_from_bfd_section
5318 (abfd
, syms
[idx
]->section
);
5322 asection
*sec
= syms
[idx
]->section
;
5325 if (sec
->output_section
)
5327 value
+= sec
->output_offset
;
5328 sec
= sec
->output_section
;
5330 /* Don't add in the section vma for relocatable output. */
5331 if (! relocatable_p
)
5333 sym
.st_value
= value
;
5334 sym
.st_size
= type_ptr
? type_ptr
->internal_elf_sym
.st_size
: 0;
5336 if (bfd_is_abs_section (sec
)
5338 && type_ptr
->internal_elf_sym
.st_shndx
!= 0)
5340 /* This symbol is in a real ELF section which we did
5341 not create as a BFD section. Undo the mapping done
5342 by copy_private_symbol_data. */
5343 shndx
= type_ptr
->internal_elf_sym
.st_shndx
;
5347 shndx
= elf_onesymtab (abfd
);
5350 shndx
= elf_dynsymtab (abfd
);
5353 shndx
= elf_tdata (abfd
)->strtab_section
;
5356 shndx
= elf_tdata (abfd
)->shstrtab_section
;
5359 shndx
= elf_tdata (abfd
)->symtab_shndx_section
;
5367 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec
);
5373 /* Writing this would be a hell of a lot easier if
5374 we had some decent documentation on bfd, and
5375 knew what to expect of the library, and what to
5376 demand of applications. For example, it
5377 appears that `objcopy' might not set the
5378 section of a symbol to be a section that is
5379 actually in the output file. */
5380 sec2
= bfd_get_section_by_name (abfd
, sec
->name
);
5381 BFD_ASSERT (sec2
!= 0);
5382 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec2
);
5383 BFD_ASSERT (shndx
!= -1);
5387 sym
.st_shndx
= shndx
;
5390 if ((flags
& BSF_THREAD_LOCAL
) != 0)
5392 else if ((flags
& BSF_FUNCTION
) != 0)
5394 else if ((flags
& BSF_OBJECT
) != 0)
5399 if (syms
[idx
]->section
->flags
& SEC_THREAD_LOCAL
)
5402 /* Processor-specific types */
5403 if (type_ptr
!= NULL
5404 && bed
->elf_backend_get_symbol_type
)
5405 type
= ((*bed
->elf_backend_get_symbol_type
)
5406 (&type_ptr
->internal_elf_sym
, type
));
5408 if (flags
& BSF_SECTION_SYM
)
5410 if (flags
& BSF_GLOBAL
)
5411 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, STT_SECTION
);
5413 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_SECTION
);
5415 else if (bfd_is_com_section (syms
[idx
]->section
))
5416 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, type
);
5417 else if (bfd_is_und_section (syms
[idx
]->section
))
5418 sym
.st_info
= ELF_ST_INFO (((flags
& BSF_WEAK
)
5422 else if (flags
& BSF_FILE
)
5423 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FILE
);
5426 int bind
= STB_LOCAL
;
5428 if (flags
& BSF_LOCAL
)
5430 else if (flags
& BSF_WEAK
)
5432 else if (flags
& BSF_GLOBAL
)
5435 sym
.st_info
= ELF_ST_INFO (bind
, type
);
5438 if (type_ptr
!= NULL
)
5439 sym
.st_other
= type_ptr
->internal_elf_sym
.st_other
;
5443 bed
->s
->swap_symbol_out (abfd
, &sym
, outbound_syms
, outbound_shndx
);
5444 outbound_syms
+= bed
->s
->sizeof_sym
;
5445 if (outbound_shndx
!= NULL
)
5446 outbound_shndx
+= sizeof (Elf_External_Sym_Shndx
);
5450 symstrtab_hdr
->sh_size
= _bfd_stringtab_size (stt
);
5451 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
5453 symstrtab_hdr
->sh_flags
= 0;
5454 symstrtab_hdr
->sh_addr
= 0;
5455 symstrtab_hdr
->sh_entsize
= 0;
5456 symstrtab_hdr
->sh_link
= 0;
5457 symstrtab_hdr
->sh_info
= 0;
5458 symstrtab_hdr
->sh_addralign
= 1;
5463 /* Return the number of bytes required to hold the symtab vector.
5465 Note that we base it on the count plus 1, since we will null terminate
5466 the vector allocated based on this size. However, the ELF symbol table
5467 always has a dummy entry as symbol #0, so it ends up even. */
5470 _bfd_elf_get_symtab_upper_bound (abfd
)
5475 Elf_Internal_Shdr
*hdr
= &elf_tdata (abfd
)->symtab_hdr
;
5477 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
5478 symtab_size
= (symcount
+ 1) * (sizeof (asymbol
*));
5480 symtab_size
-= sizeof (asymbol
*);
5486 _bfd_elf_get_dynamic_symtab_upper_bound (abfd
)
5491 Elf_Internal_Shdr
*hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
5493 if (elf_dynsymtab (abfd
) == 0)
5495 bfd_set_error (bfd_error_invalid_operation
);
5499 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
5500 symtab_size
= (symcount
+ 1) * (sizeof (asymbol
*));
5502 symtab_size
-= sizeof (asymbol
*);
5508 _bfd_elf_get_reloc_upper_bound (abfd
, asect
)
5509 bfd
*abfd ATTRIBUTE_UNUSED
;
5512 return (asect
->reloc_count
+ 1) * sizeof (arelent
*);
5515 /* Canonicalize the relocs. */
5518 _bfd_elf_canonicalize_reloc (abfd
, section
, relptr
, symbols
)
5526 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
5528 if (! bed
->s
->slurp_reloc_table (abfd
, section
, symbols
, false))
5531 tblptr
= section
->relocation
;
5532 for (i
= 0; i
< section
->reloc_count
; i
++)
5533 *relptr
++ = tblptr
++;
5537 return section
->reloc_count
;
5541 _bfd_elf_get_symtab (abfd
, alocation
)
5543 asymbol
**alocation
;
5545 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
5546 long symcount
= bed
->s
->slurp_symbol_table (abfd
, alocation
, false);
5549 bfd_get_symcount (abfd
) = symcount
;
5554 _bfd_elf_canonicalize_dynamic_symtab (abfd
, alocation
)
5556 asymbol
**alocation
;
5558 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
5559 return bed
->s
->slurp_symbol_table (abfd
, alocation
, true);
5562 /* Return the size required for the dynamic reloc entries. Any
5563 section that was actually installed in the BFD, and has type
5564 SHT_REL or SHT_RELA, and uses the dynamic symbol table, is
5565 considered to be a dynamic reloc section. */
5568 _bfd_elf_get_dynamic_reloc_upper_bound (abfd
)
5574 if (elf_dynsymtab (abfd
) == 0)
5576 bfd_set_error (bfd_error_invalid_operation
);
5580 ret
= sizeof (arelent
*);
5581 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
5582 if (elf_section_data (s
)->this_hdr
.sh_link
== elf_dynsymtab (abfd
)
5583 && (elf_section_data (s
)->this_hdr
.sh_type
== SHT_REL
5584 || elf_section_data (s
)->this_hdr
.sh_type
== SHT_RELA
))
5585 ret
+= ((s
->_raw_size
/ elf_section_data (s
)->this_hdr
.sh_entsize
)
5586 * sizeof (arelent
*));
5591 /* Canonicalize the dynamic relocation entries. Note that we return
5592 the dynamic relocations as a single block, although they are
5593 actually associated with particular sections; the interface, which
5594 was designed for SunOS style shared libraries, expects that there
5595 is only one set of dynamic relocs. Any section that was actually
5596 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses
5597 the dynamic symbol table, is considered to be a dynamic reloc
5601 _bfd_elf_canonicalize_dynamic_reloc (abfd
, storage
, syms
)
5606 boolean (*slurp_relocs
) PARAMS ((bfd
*, asection
*, asymbol
**, boolean
));
5610 if (elf_dynsymtab (abfd
) == 0)
5612 bfd_set_error (bfd_error_invalid_operation
);
5616 slurp_relocs
= get_elf_backend_data (abfd
)->s
->slurp_reloc_table
;
5618 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
5620 if (elf_section_data (s
)->this_hdr
.sh_link
== elf_dynsymtab (abfd
)
5621 && (elf_section_data (s
)->this_hdr
.sh_type
== SHT_REL
5622 || elf_section_data (s
)->this_hdr
.sh_type
== SHT_RELA
))
5627 if (! (*slurp_relocs
) (abfd
, s
, syms
, true))
5629 count
= s
->_raw_size
/ elf_section_data (s
)->this_hdr
.sh_entsize
;
5631 for (i
= 0; i
< count
; i
++)
5642 /* Read in the version information. */
5645 _bfd_elf_slurp_version_tables (abfd
)
5648 bfd_byte
*contents
= NULL
;
5651 if (elf_dynverdef (abfd
) != 0)
5653 Elf_Internal_Shdr
*hdr
;
5654 Elf_External_Verdef
*everdef
;
5655 Elf_Internal_Verdef
*iverdef
;
5656 Elf_Internal_Verdef
*iverdefarr
;
5657 Elf_Internal_Verdef iverdefmem
;
5659 unsigned int maxidx
;
5661 hdr
= &elf_tdata (abfd
)->dynverdef_hdr
;
5663 contents
= (bfd_byte
*) bfd_malloc (hdr
->sh_size
);
5664 if (contents
== NULL
)
5666 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
5667 || bfd_bread ((PTR
) contents
, hdr
->sh_size
, abfd
) != hdr
->sh_size
)
5670 /* We know the number of entries in the section but not the maximum
5671 index. Therefore we have to run through all entries and find
5673 everdef
= (Elf_External_Verdef
*) contents
;
5675 for (i
= 0; i
< hdr
->sh_info
; ++i
)
5677 _bfd_elf_swap_verdef_in (abfd
, everdef
, &iverdefmem
);
5679 if ((iverdefmem
.vd_ndx
& ((unsigned) VERSYM_VERSION
)) > maxidx
)
5680 maxidx
= iverdefmem
.vd_ndx
& ((unsigned) VERSYM_VERSION
);
5682 everdef
= ((Elf_External_Verdef
*)
5683 ((bfd_byte
*) everdef
+ iverdefmem
.vd_next
));
5686 amt
= (bfd_size_type
) maxidx
* sizeof (Elf_Internal_Verdef
);
5687 elf_tdata (abfd
)->verdef
= (Elf_Internal_Verdef
*) bfd_zalloc (abfd
, amt
);
5688 if (elf_tdata (abfd
)->verdef
== NULL
)
5691 elf_tdata (abfd
)->cverdefs
= maxidx
;
5693 everdef
= (Elf_External_Verdef
*) contents
;
5694 iverdefarr
= elf_tdata (abfd
)->verdef
;
5695 for (i
= 0; i
< hdr
->sh_info
; i
++)
5697 Elf_External_Verdaux
*everdaux
;
5698 Elf_Internal_Verdaux
*iverdaux
;
5701 _bfd_elf_swap_verdef_in (abfd
, everdef
, &iverdefmem
);
5703 iverdef
= &iverdefarr
[(iverdefmem
.vd_ndx
& VERSYM_VERSION
) - 1];
5704 memcpy (iverdef
, &iverdefmem
, sizeof (Elf_Internal_Verdef
));
5706 iverdef
->vd_bfd
= abfd
;
5708 amt
= (bfd_size_type
) iverdef
->vd_cnt
* sizeof (Elf_Internal_Verdaux
);
5709 iverdef
->vd_auxptr
= (Elf_Internal_Verdaux
*) bfd_alloc (abfd
, amt
);
5710 if (iverdef
->vd_auxptr
== NULL
)
5713 everdaux
= ((Elf_External_Verdaux
*)
5714 ((bfd_byte
*) everdef
+ iverdef
->vd_aux
));
5715 iverdaux
= iverdef
->vd_auxptr
;
5716 for (j
= 0; j
< iverdef
->vd_cnt
; j
++, iverdaux
++)
5718 _bfd_elf_swap_verdaux_in (abfd
, everdaux
, iverdaux
);
5720 iverdaux
->vda_nodename
=
5721 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
5722 iverdaux
->vda_name
);
5723 if (iverdaux
->vda_nodename
== NULL
)
5726 if (j
+ 1 < iverdef
->vd_cnt
)
5727 iverdaux
->vda_nextptr
= iverdaux
+ 1;
5729 iverdaux
->vda_nextptr
= NULL
;
5731 everdaux
= ((Elf_External_Verdaux
*)
5732 ((bfd_byte
*) everdaux
+ iverdaux
->vda_next
));
5735 iverdef
->vd_nodename
= iverdef
->vd_auxptr
->vda_nodename
;
5737 if (i
+ 1 < hdr
->sh_info
)
5738 iverdef
->vd_nextdef
= iverdef
+ 1;
5740 iverdef
->vd_nextdef
= NULL
;
5742 everdef
= ((Elf_External_Verdef
*)
5743 ((bfd_byte
*) everdef
+ iverdef
->vd_next
));
5750 if (elf_dynverref (abfd
) != 0)
5752 Elf_Internal_Shdr
*hdr
;
5753 Elf_External_Verneed
*everneed
;
5754 Elf_Internal_Verneed
*iverneed
;
5757 hdr
= &elf_tdata (abfd
)->dynverref_hdr
;
5759 amt
= (bfd_size_type
) hdr
->sh_info
* sizeof (Elf_Internal_Verneed
);
5760 elf_tdata (abfd
)->verref
=
5761 (Elf_Internal_Verneed
*) bfd_zalloc (abfd
, amt
);
5762 if (elf_tdata (abfd
)->verref
== NULL
)
5765 elf_tdata (abfd
)->cverrefs
= hdr
->sh_info
;
5767 contents
= (bfd_byte
*) bfd_malloc (hdr
->sh_size
);
5768 if (contents
== NULL
)
5770 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
5771 || bfd_bread ((PTR
) contents
, hdr
->sh_size
, abfd
) != hdr
->sh_size
)
5774 everneed
= (Elf_External_Verneed
*) contents
;
5775 iverneed
= elf_tdata (abfd
)->verref
;
5776 for (i
= 0; i
< hdr
->sh_info
; i
++, iverneed
++)
5778 Elf_External_Vernaux
*evernaux
;
5779 Elf_Internal_Vernaux
*ivernaux
;
5782 _bfd_elf_swap_verneed_in (abfd
, everneed
, iverneed
);
5784 iverneed
->vn_bfd
= abfd
;
5786 iverneed
->vn_filename
=
5787 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
5789 if (iverneed
->vn_filename
== NULL
)
5792 amt
= iverneed
->vn_cnt
;
5793 amt
*= sizeof (Elf_Internal_Vernaux
);
5794 iverneed
->vn_auxptr
= (Elf_Internal_Vernaux
*) bfd_alloc (abfd
, amt
);
5796 evernaux
= ((Elf_External_Vernaux
*)
5797 ((bfd_byte
*) everneed
+ iverneed
->vn_aux
));
5798 ivernaux
= iverneed
->vn_auxptr
;
5799 for (j
= 0; j
< iverneed
->vn_cnt
; j
++, ivernaux
++)
5801 _bfd_elf_swap_vernaux_in (abfd
, evernaux
, ivernaux
);
5803 ivernaux
->vna_nodename
=
5804 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
5805 ivernaux
->vna_name
);
5806 if (ivernaux
->vna_nodename
== NULL
)
5809 if (j
+ 1 < iverneed
->vn_cnt
)
5810 ivernaux
->vna_nextptr
= ivernaux
+ 1;
5812 ivernaux
->vna_nextptr
= NULL
;
5814 evernaux
= ((Elf_External_Vernaux
*)
5815 ((bfd_byte
*) evernaux
+ ivernaux
->vna_next
));
5818 if (i
+ 1 < hdr
->sh_info
)
5819 iverneed
->vn_nextref
= iverneed
+ 1;
5821 iverneed
->vn_nextref
= NULL
;
5823 everneed
= ((Elf_External_Verneed
*)
5824 ((bfd_byte
*) everneed
+ iverneed
->vn_next
));
5834 if (contents
== NULL
)
5840 _bfd_elf_make_empty_symbol (abfd
)
5843 elf_symbol_type
*newsym
;
5844 bfd_size_type amt
= sizeof (elf_symbol_type
);
5846 newsym
= (elf_symbol_type
*) bfd_zalloc (abfd
, amt
);
5851 newsym
->symbol
.the_bfd
= abfd
;
5852 return &newsym
->symbol
;
5857 _bfd_elf_get_symbol_info (ignore_abfd
, symbol
, ret
)
5858 bfd
*ignore_abfd ATTRIBUTE_UNUSED
;
5862 bfd_symbol_info (symbol
, ret
);
5865 /* Return whether a symbol name implies a local symbol. Most targets
5866 use this function for the is_local_label_name entry point, but some
5870 _bfd_elf_is_local_label_name (abfd
, name
)
5871 bfd
*abfd ATTRIBUTE_UNUSED
;
5874 /* Normal local symbols start with ``.L''. */
5875 if (name
[0] == '.' && name
[1] == 'L')
5878 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
5879 DWARF debugging symbols starting with ``..''. */
5880 if (name
[0] == '.' && name
[1] == '.')
5883 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
5884 emitting DWARF debugging output. I suspect this is actually a
5885 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
5886 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
5887 underscore to be emitted on some ELF targets). For ease of use,
5888 we treat such symbols as local. */
5889 if (name
[0] == '_' && name
[1] == '.' && name
[2] == 'L' && name
[3] == '_')
5896 _bfd_elf_get_lineno (ignore_abfd
, symbol
)
5897 bfd
*ignore_abfd ATTRIBUTE_UNUSED
;
5898 asymbol
*symbol ATTRIBUTE_UNUSED
;
5905 _bfd_elf_set_arch_mach (abfd
, arch
, machine
)
5907 enum bfd_architecture arch
;
5908 unsigned long machine
;
5910 /* If this isn't the right architecture for this backend, and this
5911 isn't the generic backend, fail. */
5912 if (arch
!= get_elf_backend_data (abfd
)->arch
5913 && arch
!= bfd_arch_unknown
5914 && get_elf_backend_data (abfd
)->arch
!= bfd_arch_unknown
)
5917 return bfd_default_set_arch_mach (abfd
, arch
, machine
);
5920 /* Find the function to a particular section and offset,
5921 for error reporting. */
5924 elf_find_function (abfd
, section
, symbols
, offset
,
5925 filename_ptr
, functionname_ptr
)
5926 bfd
*abfd ATTRIBUTE_UNUSED
;
5930 const char **filename_ptr
;
5931 const char **functionname_ptr
;
5933 const char *filename
;
5942 for (p
= symbols
; *p
!= NULL
; p
++)
5946 q
= (elf_symbol_type
*) *p
;
5948 if (bfd_get_section (&q
->symbol
) != section
)
5951 switch (ELF_ST_TYPE (q
->internal_elf_sym
.st_info
))
5956 filename
= bfd_asymbol_name (&q
->symbol
);
5960 if (q
->symbol
.section
== section
5961 && q
->symbol
.value
>= low_func
5962 && q
->symbol
.value
<= offset
)
5964 func
= (asymbol
*) q
;
5965 low_func
= q
->symbol
.value
;
5975 *filename_ptr
= filename
;
5976 if (functionname_ptr
)
5977 *functionname_ptr
= bfd_asymbol_name (func
);
5982 /* Find the nearest line to a particular section and offset,
5983 for error reporting. */
5986 _bfd_elf_find_nearest_line (abfd
, section
, symbols
, offset
,
5987 filename_ptr
, functionname_ptr
, line_ptr
)
5992 const char **filename_ptr
;
5993 const char **functionname_ptr
;
5994 unsigned int *line_ptr
;
5998 if (_bfd_dwarf1_find_nearest_line (abfd
, section
, symbols
, offset
,
5999 filename_ptr
, functionname_ptr
,
6002 if (!*functionname_ptr
)
6003 elf_find_function (abfd
, section
, symbols
, offset
,
6004 *filename_ptr
? NULL
: filename_ptr
,
6010 if (_bfd_dwarf2_find_nearest_line (abfd
, section
, symbols
, offset
,
6011 filename_ptr
, functionname_ptr
,
6013 &elf_tdata (abfd
)->dwarf2_find_line_info
))
6015 if (!*functionname_ptr
)
6016 elf_find_function (abfd
, section
, symbols
, offset
,
6017 *filename_ptr
? NULL
: filename_ptr
,
6023 if (! _bfd_stab_section_find_nearest_line (abfd
, symbols
, section
, offset
,
6024 &found
, filename_ptr
,
6025 functionname_ptr
, line_ptr
,
6026 &elf_tdata (abfd
)->line_info
))
6031 if (symbols
== NULL
)
6034 if (! elf_find_function (abfd
, section
, symbols
, offset
,
6035 filename_ptr
, functionname_ptr
))
6043 _bfd_elf_sizeof_headers (abfd
, reloc
)
6049 ret
= get_elf_backend_data (abfd
)->s
->sizeof_ehdr
;
6051 ret
+= get_program_header_size (abfd
);
6056 _bfd_elf_set_section_contents (abfd
, section
, location
, offset
, count
)
6061 bfd_size_type count
;
6063 Elf_Internal_Shdr
*hdr
;
6066 if (! abfd
->output_has_begun
6067 && ! (_bfd_elf_compute_section_file_positions
6068 (abfd
, (struct bfd_link_info
*) NULL
)))
6071 hdr
= &elf_section_data (section
)->this_hdr
;
6072 pos
= hdr
->sh_offset
+ offset
;
6073 if (bfd_seek (abfd
, pos
, SEEK_SET
) != 0
6074 || bfd_bwrite (location
, count
, abfd
) != count
)
6081 _bfd_elf_no_info_to_howto (abfd
, cache_ptr
, dst
)
6082 bfd
*abfd ATTRIBUTE_UNUSED
;
6083 arelent
*cache_ptr ATTRIBUTE_UNUSED
;
6084 Elf_Internal_Rela
*dst ATTRIBUTE_UNUSED
;
6091 _bfd_elf_no_info_to_howto_rel (abfd
, cache_ptr
, dst
)
6094 Elf_Internal_Rel
*dst
;
6100 /* Try to convert a non-ELF reloc into an ELF one. */
6103 _bfd_elf_validate_reloc (abfd
, areloc
)
6107 /* Check whether we really have an ELF howto. */
6109 if ((*areloc
->sym_ptr_ptr
)->the_bfd
->xvec
!= abfd
->xvec
)
6111 bfd_reloc_code_real_type code
;
6112 reloc_howto_type
*howto
;
6114 /* Alien reloc: Try to determine its type to replace it with an
6115 equivalent ELF reloc. */
6117 if (areloc
->howto
->pc_relative
)
6119 switch (areloc
->howto
->bitsize
)
6122 code
= BFD_RELOC_8_PCREL
;
6125 code
= BFD_RELOC_12_PCREL
;
6128 code
= BFD_RELOC_16_PCREL
;
6131 code
= BFD_RELOC_24_PCREL
;
6134 code
= BFD_RELOC_32_PCREL
;
6137 code
= BFD_RELOC_64_PCREL
;
6143 howto
= bfd_reloc_type_lookup (abfd
, code
);
6145 if (areloc
->howto
->pcrel_offset
!= howto
->pcrel_offset
)
6147 if (howto
->pcrel_offset
)
6148 areloc
->addend
+= areloc
->address
;
6150 areloc
->addend
-= areloc
->address
; /* addend is unsigned!! */
6155 switch (areloc
->howto
->bitsize
)
6161 code
= BFD_RELOC_14
;
6164 code
= BFD_RELOC_16
;
6167 code
= BFD_RELOC_26
;
6170 code
= BFD_RELOC_32
;
6173 code
= BFD_RELOC_64
;
6179 howto
= bfd_reloc_type_lookup (abfd
, code
);
6183 areloc
->howto
= howto
;
6191 (*_bfd_error_handler
)
6192 (_("%s: unsupported relocation type %s"),
6193 bfd_archive_filename (abfd
), areloc
->howto
->name
);
6194 bfd_set_error (bfd_error_bad_value
);
6199 _bfd_elf_close_and_cleanup (abfd
)
6202 if (bfd_get_format (abfd
) == bfd_object
)
6204 if (elf_shstrtab (abfd
) != NULL
)
6205 _bfd_elf_strtab_free (elf_shstrtab (abfd
));
6208 return _bfd_generic_close_and_cleanup (abfd
);
6211 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
6212 in the relocation's offset. Thus we cannot allow any sort of sanity
6213 range-checking to interfere. There is nothing else to do in processing
6216 bfd_reloc_status_type
6217 _bfd_elf_rel_vtable_reloc_fn (abfd
, re
, symbol
, data
, is
, obfd
, errmsg
)
6218 bfd
*abfd ATTRIBUTE_UNUSED
;
6219 arelent
*re ATTRIBUTE_UNUSED
;
6220 struct symbol_cache_entry
*symbol ATTRIBUTE_UNUSED
;
6221 PTR data ATTRIBUTE_UNUSED
;
6222 asection
*is ATTRIBUTE_UNUSED
;
6223 bfd
*obfd ATTRIBUTE_UNUSED
;
6224 char **errmsg ATTRIBUTE_UNUSED
;
6226 return bfd_reloc_ok
;
6229 /* Elf core file support. Much of this only works on native
6230 toolchains, since we rely on knowing the
6231 machine-dependent procfs structure in order to pick
6232 out details about the corefile. */
6234 #ifdef HAVE_SYS_PROCFS_H
6235 # include <sys/procfs.h>
6238 /* FIXME: this is kinda wrong, but it's what gdb wants. */
6241 elfcore_make_pid (abfd
)
6244 return ((elf_tdata (abfd
)->core_lwpid
<< 16)
6245 + (elf_tdata (abfd
)->core_pid
));
6248 /* If there isn't a section called NAME, make one, using
6249 data from SECT. Note, this function will generate a
6250 reference to NAME, so you shouldn't deallocate or
6254 elfcore_maybe_make_sect (abfd
, name
, sect
)
6261 if (bfd_get_section_by_name (abfd
, name
) != NULL
)
6264 sect2
= bfd_make_section (abfd
, name
);
6268 sect2
->_raw_size
= sect
->_raw_size
;
6269 sect2
->filepos
= sect
->filepos
;
6270 sect2
->flags
= sect
->flags
;
6271 sect2
->alignment_power
= sect
->alignment_power
;
6275 /* Create a pseudosection containing SIZE bytes at FILEPOS. This
6276 actually creates up to two pseudosections:
6277 - For the single-threaded case, a section named NAME, unless
6278 such a section already exists.
6279 - For the multi-threaded case, a section named "NAME/PID", where
6280 PID is elfcore_make_pid (abfd).
6281 Both pseudosections have identical contents. */
6283 _bfd_elfcore_make_pseudosection (abfd
, name
, size
, filepos
)
6290 char *threaded_name
;
6294 /* Build the section name. */
6296 sprintf (buf
, "%s/%d", name
, elfcore_make_pid (abfd
));
6297 len
= strlen (buf
) + 1;
6298 threaded_name
= bfd_alloc (abfd
, (bfd_size_type
) len
);
6299 if (threaded_name
== NULL
)
6301 memcpy (threaded_name
, buf
, len
);
6303 sect
= bfd_make_section (abfd
, threaded_name
);
6306 sect
->_raw_size
= size
;
6307 sect
->filepos
= filepos
;
6308 sect
->flags
= SEC_HAS_CONTENTS
;
6309 sect
->alignment_power
= 2;
6311 return elfcore_maybe_make_sect (abfd
, name
, sect
);
6314 /* prstatus_t exists on:
6316 linux 2.[01] + glibc
6320 #if defined (HAVE_PRSTATUS_T)
6321 static boolean elfcore_grok_prstatus
PARAMS ((bfd
*, Elf_Internal_Note
*));
6324 elfcore_grok_prstatus (abfd
, note
)
6326 Elf_Internal_Note
*note
;
6331 if (note
->descsz
== sizeof (prstatus_t
))
6335 raw_size
= sizeof (prstat
.pr_reg
);
6336 offset
= offsetof (prstatus_t
, pr_reg
);
6337 memcpy (&prstat
, note
->descdata
, sizeof (prstat
));
6339 /* Do not overwrite the core signal if it
6340 has already been set by another thread. */
6341 if (elf_tdata (abfd
)->core_signal
== 0)
6342 elf_tdata (abfd
)->core_signal
= prstat
.pr_cursig
;
6343 elf_tdata (abfd
)->core_pid
= prstat
.pr_pid
;
6345 /* pr_who exists on:
6348 pr_who doesn't exist on:
6351 #if defined (HAVE_PRSTATUS_T_PR_WHO)
6352 elf_tdata (abfd
)->core_lwpid
= prstat
.pr_who
;
6355 #if defined (HAVE_PRSTATUS32_T)
6356 else if (note
->descsz
== sizeof (prstatus32_t
))
6358 /* 64-bit host, 32-bit corefile */
6359 prstatus32_t prstat
;
6361 raw_size
= sizeof (prstat
.pr_reg
);
6362 offset
= offsetof (prstatus32_t
, pr_reg
);
6363 memcpy (&prstat
, note
->descdata
, sizeof (prstat
));
6365 /* Do not overwrite the core signal if it
6366 has already been set by another thread. */
6367 if (elf_tdata (abfd
)->core_signal
== 0)
6368 elf_tdata (abfd
)->core_signal
= prstat
.pr_cursig
;
6369 elf_tdata (abfd
)->core_pid
= prstat
.pr_pid
;
6371 /* pr_who exists on:
6374 pr_who doesn't exist on:
6377 #if defined (HAVE_PRSTATUS32_T_PR_WHO)
6378 elf_tdata (abfd
)->core_lwpid
= prstat
.pr_who
;
6381 #endif /* HAVE_PRSTATUS32_T */
6384 /* Fail - we don't know how to handle any other
6385 note size (ie. data object type). */
6389 /* Make a ".reg/999" section and a ".reg" section. */
6390 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
6391 raw_size
, note
->descpos
+ offset
);
6393 #endif /* defined (HAVE_PRSTATUS_T) */
6395 /* Create a pseudosection containing the exact contents of NOTE. */
6397 elfcore_make_note_pseudosection (abfd
, name
, note
)
6400 Elf_Internal_Note
*note
;
6402 return _bfd_elfcore_make_pseudosection (abfd
, name
,
6403 note
->descsz
, note
->descpos
);
6406 /* There isn't a consistent prfpregset_t across platforms,
6407 but it doesn't matter, because we don't have to pick this
6408 data structure apart. */
6411 elfcore_grok_prfpreg (abfd
, note
)
6413 Elf_Internal_Note
*note
;
6415 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
6418 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
6419 type of 5 (NT_PRXFPREG). Just include the whole note's contents
6423 elfcore_grok_prxfpreg (abfd
, note
)
6425 Elf_Internal_Note
*note
;
6427 return elfcore_make_note_pseudosection (abfd
, ".reg-xfp", note
);
6430 #if defined (HAVE_PRPSINFO_T)
6431 typedef prpsinfo_t elfcore_psinfo_t
;
6432 #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
6433 typedef prpsinfo32_t elfcore_psinfo32_t
;
6437 #if defined (HAVE_PSINFO_T)
6438 typedef psinfo_t elfcore_psinfo_t
;
6439 #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
6440 typedef psinfo32_t elfcore_psinfo32_t
;
6444 /* return a malloc'ed copy of a string at START which is at
6445 most MAX bytes long, possibly without a terminating '\0'.
6446 the copy will always have a terminating '\0'. */
6449 _bfd_elfcore_strndup (abfd
, start
, max
)
6455 char *end
= memchr (start
, '\0', max
);
6463 dups
= bfd_alloc (abfd
, (bfd_size_type
) len
+ 1);
6467 memcpy (dups
, start
, len
);
6473 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
6474 static boolean elfcore_grok_psinfo
PARAMS ((bfd
*, Elf_Internal_Note
*));
6477 elfcore_grok_psinfo (abfd
, note
)
6479 Elf_Internal_Note
*note
;
6481 if (note
->descsz
== sizeof (elfcore_psinfo_t
))
6483 elfcore_psinfo_t psinfo
;
6485 memcpy (&psinfo
, note
->descdata
, sizeof (psinfo
));
6487 elf_tdata (abfd
)->core_program
6488 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_fname
,
6489 sizeof (psinfo
.pr_fname
));
6491 elf_tdata (abfd
)->core_command
6492 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_psargs
,
6493 sizeof (psinfo
.pr_psargs
));
6495 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
6496 else if (note
->descsz
== sizeof (elfcore_psinfo32_t
))
6498 /* 64-bit host, 32-bit corefile */
6499 elfcore_psinfo32_t psinfo
;
6501 memcpy (&psinfo
, note
->descdata
, sizeof (psinfo
));
6503 elf_tdata (abfd
)->core_program
6504 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_fname
,
6505 sizeof (psinfo
.pr_fname
));
6507 elf_tdata (abfd
)->core_command
6508 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_psargs
,
6509 sizeof (psinfo
.pr_psargs
));
6515 /* Fail - we don't know how to handle any other
6516 note size (ie. data object type). */
6520 /* Note that for some reason, a spurious space is tacked
6521 onto the end of the args in some (at least one anyway)
6522 implementations, so strip it off if it exists. */
6525 char *command
= elf_tdata (abfd
)->core_command
;
6526 int n
= strlen (command
);
6528 if (0 < n
&& command
[n
- 1] == ' ')
6529 command
[n
- 1] = '\0';
6534 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
6536 #if defined (HAVE_PSTATUS_T)
6537 static boolean elfcore_grok_pstatus
PARAMS ((bfd
*, Elf_Internal_Note
*));
6540 elfcore_grok_pstatus (abfd
, note
)
6542 Elf_Internal_Note
*note
;
6544 if (note
->descsz
== sizeof (pstatus_t
)
6545 #if defined (HAVE_PXSTATUS_T)
6546 || note
->descsz
== sizeof (pxstatus_t
)
6552 memcpy (&pstat
, note
->descdata
, sizeof (pstat
));
6554 elf_tdata (abfd
)->core_pid
= pstat
.pr_pid
;
6556 #if defined (HAVE_PSTATUS32_T)
6557 else if (note
->descsz
== sizeof (pstatus32_t
))
6559 /* 64-bit host, 32-bit corefile */
6562 memcpy (&pstat
, note
->descdata
, sizeof (pstat
));
6564 elf_tdata (abfd
)->core_pid
= pstat
.pr_pid
;
6567 /* Could grab some more details from the "representative"
6568 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
6569 NT_LWPSTATUS note, presumably. */
6573 #endif /* defined (HAVE_PSTATUS_T) */
6575 #if defined (HAVE_LWPSTATUS_T)
6576 static boolean elfcore_grok_lwpstatus
PARAMS ((bfd
*, Elf_Internal_Note
*));
6579 elfcore_grok_lwpstatus (abfd
, note
)
6581 Elf_Internal_Note
*note
;
6583 lwpstatus_t lwpstat
;
6589 if (note
->descsz
!= sizeof (lwpstat
)
6590 #if defined (HAVE_LWPXSTATUS_T)
6591 && note
->descsz
!= sizeof (lwpxstatus_t
)
6596 memcpy (&lwpstat
, note
->descdata
, sizeof (lwpstat
));
6598 elf_tdata (abfd
)->core_lwpid
= lwpstat
.pr_lwpid
;
6599 elf_tdata (abfd
)->core_signal
= lwpstat
.pr_cursig
;
6601 /* Make a ".reg/999" section. */
6603 sprintf (buf
, ".reg/%d", elfcore_make_pid (abfd
));
6604 len
= strlen (buf
) + 1;
6605 name
= bfd_alloc (abfd
, (bfd_size_type
) len
);
6608 memcpy (name
, buf
, len
);
6610 sect
= bfd_make_section (abfd
, name
);
6614 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
6615 sect
->_raw_size
= sizeof (lwpstat
.pr_context
.uc_mcontext
.gregs
);
6616 sect
->filepos
= note
->descpos
6617 + offsetof (lwpstatus_t
, pr_context
.uc_mcontext
.gregs
);
6620 #if defined (HAVE_LWPSTATUS_T_PR_REG)
6621 sect
->_raw_size
= sizeof (lwpstat
.pr_reg
);
6622 sect
->filepos
= note
->descpos
+ offsetof (lwpstatus_t
, pr_reg
);
6625 sect
->flags
= SEC_HAS_CONTENTS
;
6626 sect
->alignment_power
= 2;
6628 if (!elfcore_maybe_make_sect (abfd
, ".reg", sect
))
6631 /* Make a ".reg2/999" section */
6633 sprintf (buf
, ".reg2/%d", elfcore_make_pid (abfd
));
6634 len
= strlen (buf
) + 1;
6635 name
= bfd_alloc (abfd
, (bfd_size_type
) len
);
6638 memcpy (name
, buf
, len
);
6640 sect
= bfd_make_section (abfd
, name
);
6644 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
6645 sect
->_raw_size
= sizeof (lwpstat
.pr_context
.uc_mcontext
.fpregs
);
6646 sect
->filepos
= note
->descpos
6647 + offsetof (lwpstatus_t
, pr_context
.uc_mcontext
.fpregs
);
6650 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
6651 sect
->_raw_size
= sizeof (lwpstat
.pr_fpreg
);
6652 sect
->filepos
= note
->descpos
+ offsetof (lwpstatus_t
, pr_fpreg
);
6655 sect
->flags
= SEC_HAS_CONTENTS
;
6656 sect
->alignment_power
= 2;
6658 return elfcore_maybe_make_sect (abfd
, ".reg2", sect
);
6660 #endif /* defined (HAVE_LWPSTATUS_T) */
6662 #if defined (HAVE_WIN32_PSTATUS_T)
6664 elfcore_grok_win32pstatus (abfd
, note
)
6666 Elf_Internal_Note
*note
;
6672 win32_pstatus_t pstatus
;
6674 if (note
->descsz
< sizeof (pstatus
))
6677 memcpy (&pstatus
, note
->descdata
, sizeof (pstatus
));
6679 switch (pstatus
.data_type
)
6681 case NOTE_INFO_PROCESS
:
6682 /* FIXME: need to add ->core_command. */
6683 elf_tdata (abfd
)->core_signal
= pstatus
.data
.process_info
.signal
;
6684 elf_tdata (abfd
)->core_pid
= pstatus
.data
.process_info
.pid
;
6687 case NOTE_INFO_THREAD
:
6688 /* Make a ".reg/999" section. */
6689 sprintf (buf
, ".reg/%d", pstatus
.data
.thread_info
.tid
);
6691 len
= strlen (buf
) + 1;
6692 name
= bfd_alloc (abfd
, (bfd_size_type
) len
);
6696 memcpy (name
, buf
, len
);
6698 sect
= bfd_make_section (abfd
, name
);
6702 sect
->_raw_size
= sizeof (pstatus
.data
.thread_info
.thread_context
);
6703 sect
->filepos
= (note
->descpos
6704 + offsetof (struct win32_pstatus
,
6705 data
.thread_info
.thread_context
));
6706 sect
->flags
= SEC_HAS_CONTENTS
;
6707 sect
->alignment_power
= 2;
6709 if (pstatus
.data
.thread_info
.is_active_thread
)
6710 if (! elfcore_maybe_make_sect (abfd
, ".reg", sect
))
6714 case NOTE_INFO_MODULE
:
6715 /* Make a ".module/xxxxxxxx" section. */
6716 sprintf (buf
, ".module/%08x", pstatus
.data
.module_info
.base_address
);
6718 len
= strlen (buf
) + 1;
6719 name
= bfd_alloc (abfd
, (bfd_size_type
) len
);
6723 memcpy (name
, buf
, len
);
6725 sect
= bfd_make_section (abfd
, name
);
6730 sect
->_raw_size
= note
->descsz
;
6731 sect
->filepos
= note
->descpos
;
6732 sect
->flags
= SEC_HAS_CONTENTS
;
6733 sect
->alignment_power
= 2;
6742 #endif /* HAVE_WIN32_PSTATUS_T */
6745 elfcore_grok_note (abfd
, note
)
6747 Elf_Internal_Note
*note
;
6749 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
6757 if (bed
->elf_backend_grok_prstatus
)
6758 if ((*bed
->elf_backend_grok_prstatus
) (abfd
, note
))
6760 #if defined (HAVE_PRSTATUS_T)
6761 return elfcore_grok_prstatus (abfd
, note
);
6766 #if defined (HAVE_PSTATUS_T)
6768 return elfcore_grok_pstatus (abfd
, note
);
6771 #if defined (HAVE_LWPSTATUS_T)
6773 return elfcore_grok_lwpstatus (abfd
, note
);
6776 case NT_FPREGSET
: /* FIXME: rename to NT_PRFPREG */
6777 return elfcore_grok_prfpreg (abfd
, note
);
6779 #if defined (HAVE_WIN32_PSTATUS_T)
6780 case NT_WIN32PSTATUS
:
6781 return elfcore_grok_win32pstatus (abfd
, note
);
6784 case NT_PRXFPREG
: /* Linux SSE extension */
6785 if (note
->namesz
== 5
6786 && ! strcmp (note
->namedata
, "LINUX"))
6787 return elfcore_grok_prxfpreg (abfd
, note
);
6793 if (bed
->elf_backend_grok_psinfo
)
6794 if ((*bed
->elf_backend_grok_psinfo
) (abfd
, note
))
6796 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
6797 return elfcore_grok_psinfo (abfd
, note
);
6805 elfcore_netbsd_get_lwpid (note
, lwpidp
)
6806 Elf_Internal_Note
*note
;
6811 cp
= strchr (note
->namedata
, '@');
6814 *lwpidp
= atoi(cp
+ 1);
6821 elfcore_grok_netbsd_procinfo (abfd
, note
)
6823 Elf_Internal_Note
*note
;
6826 /* Signal number at offset 0x08. */
6827 elf_tdata (abfd
)->core_signal
6828 = bfd_h_get_32 (abfd
, (bfd_byte
*) note
->descdata
+ 0x08);
6830 /* Process ID at offset 0x50. */
6831 elf_tdata (abfd
)->core_pid
6832 = bfd_h_get_32 (abfd
, (bfd_byte
*) note
->descdata
+ 0x50);
6834 /* Command name at 0x7c (max 32 bytes, including nul). */
6835 elf_tdata (abfd
)->core_command
6836 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 0x7c, 31);
6842 elfcore_grok_netbsd_note (abfd
, note
)
6844 Elf_Internal_Note
*note
;
6848 if (elfcore_netbsd_get_lwpid (note
, &lwp
))
6849 elf_tdata (abfd
)->core_lwpid
= lwp
;
6851 if (note
->type
== NT_NETBSDCORE_PROCINFO
)
6853 /* NetBSD-specific core "procinfo". Note that we expect to
6854 find this note before any of the others, which is fine,
6855 since the kernel writes this note out first when it
6856 creates a core file. */
6858 return elfcore_grok_netbsd_procinfo (abfd
, note
);
6861 /* As of Jan 2002 there are no other machine-independent notes
6862 defined for NetBSD core files. If the note type is less
6863 than the start of the machine-dependent note types, we don't
6866 if (note
->type
< NT_NETBSDCORE_FIRSTMACH
)
6870 switch (bfd_get_arch (abfd
))
6872 /* On the Alpha, SPARC (32-bit and 64-bit), PT_GETREGS == mach+0 and
6873 PT_GETFPREGS == mach+2. */
6875 case bfd_arch_alpha
:
6876 case bfd_arch_sparc
:
6879 case NT_NETBSDCORE_FIRSTMACH
+0:
6880 return elfcore_make_note_pseudosection (abfd
, ".reg", note
);
6882 case NT_NETBSDCORE_FIRSTMACH
+2:
6883 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
6889 /* On all other arch's, PT_GETREGS == mach+1 and
6890 PT_GETFPREGS == mach+3. */
6895 case NT_NETBSDCORE_FIRSTMACH
+1:
6896 return elfcore_make_note_pseudosection (abfd
, ".reg", note
);
6898 case NT_NETBSDCORE_FIRSTMACH
+3:
6899 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
6908 /* Function: elfcore_write_note
6915 size of data for note
6918 End of buffer containing note. */
6921 elfcore_write_note (abfd
, buf
, bufsiz
, name
, type
, input
, size
)
6930 Elf_External_Note
*xnp
;
6940 struct elf_backend_data
*bed
;
6942 namesz
= strlen (name
) + 1;
6943 bed
= get_elf_backend_data (abfd
);
6944 pad
= -namesz
& (bed
->s
->file_align
- 1);
6947 newspace
= sizeof (Elf_External_Note
) - 1 + namesz
+ pad
+ size
;
6949 p
= realloc (buf
, *bufsiz
+ newspace
);
6951 *bufsiz
+= newspace
;
6952 xnp
= (Elf_External_Note
*) dest
;
6953 H_PUT_32 (abfd
, namesz
, xnp
->namesz
);
6954 H_PUT_32 (abfd
, size
, xnp
->descsz
);
6955 H_PUT_32 (abfd
, type
, xnp
->type
);
6959 memcpy (dest
, name
, namesz
);
6967 memcpy (dest
, input
, size
);
6971 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
6973 elfcore_write_prpsinfo (abfd
, buf
, bufsiz
, fname
, psargs
)
6981 char *note_name
= "CORE";
6983 #if defined (HAVE_PSINFO_T)
6985 note_type
= NT_PSINFO
;
6988 note_type
= NT_PRPSINFO
;
6991 memset (&data
, 0, sizeof (data
));
6992 strncpy (data
.pr_fname
, fname
, sizeof (data
.pr_fname
));
6993 strncpy (data
.pr_psargs
, psargs
, sizeof (data
.pr_psargs
));
6994 return elfcore_write_note (abfd
, buf
, bufsiz
,
6995 note_name
, note_type
, &data
, sizeof (data
));
6997 #endif /* PSINFO_T or PRPSINFO_T */
6999 #if defined (HAVE_PRSTATUS_T)
7001 elfcore_write_prstatus (abfd
, buf
, bufsiz
, pid
, cursig
, gregs
)
7010 char *note_name
= "CORE";
7012 memset (&prstat
, 0, sizeof (prstat
));
7013 prstat
.pr_pid
= pid
;
7014 prstat
.pr_cursig
= cursig
;
7015 memcpy (&prstat
.pr_reg
, gregs
, sizeof (prstat
.pr_reg
));
7016 return elfcore_write_note (abfd
, buf
, bufsiz
,
7017 note_name
, NT_PRSTATUS
, &prstat
, sizeof (prstat
));
7019 #endif /* HAVE_PRSTATUS_T */
7021 #if defined (HAVE_LWPSTATUS_T)
7023 elfcore_write_lwpstatus (abfd
, buf
, bufsiz
, pid
, cursig
, gregs
)
7031 lwpstatus_t lwpstat
;
7032 char *note_name
= "CORE";
7034 memset (&lwpstat
, 0, sizeof (lwpstat
));
7035 lwpstat
.pr_lwpid
= pid
>> 16;
7036 lwpstat
.pr_cursig
= cursig
;
7037 #if defined (HAVE_LWPSTATUS_T_PR_REG)
7038 memcpy (lwpstat
.pr_reg
, gregs
, sizeof (lwpstat
.pr_reg
));
7039 #elif defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7041 memcpy (lwpstat
.pr_context
.uc_mcontext
.gregs
,
7042 gregs
, sizeof (lwpstat
.pr_context
.uc_mcontext
.gregs
));
7044 memcpy (lwpstat
.pr_context
.uc_mcontext
.__gregs
,
7045 gregs
, sizeof (lwpstat
.pr_context
.uc_mcontext
.__gregs
));
7048 return elfcore_write_note (abfd
, buf
, bufsiz
, note_name
,
7049 NT_LWPSTATUS
, &lwpstat
, sizeof (lwpstat
));
7051 #endif /* HAVE_LWPSTATUS_T */
7053 #if defined (HAVE_PSTATUS_T)
7055 elfcore_write_pstatus (abfd
, buf
, bufsiz
, pid
, cursig
, gregs
)
7064 char *note_name
= "CORE";
7066 memset (&pstat
, 0, sizeof (pstat
));
7067 pstat
.pr_pid
= pid
& 0xffff;
7068 buf
= elfcore_write_note (abfd
, buf
, bufsiz
, note_name
,
7069 NT_PSTATUS
, &pstat
, sizeof (pstat
));
7072 #endif /* HAVE_PSTATUS_T */
7075 elfcore_write_prfpreg (abfd
, buf
, bufsiz
, fpregs
, size
)
7082 char *note_name
= "CORE";
7083 return elfcore_write_note (abfd
, buf
, bufsiz
,
7084 note_name
, NT_FPREGSET
, fpregs
, size
);
7088 elfcore_write_prxfpreg (abfd
, buf
, bufsiz
, xfpregs
, size
)
7095 char *note_name
= "LINUX";
7096 return elfcore_write_note (abfd
, buf
, bufsiz
,
7097 note_name
, NT_PRXFPREG
, xfpregs
, size
);
7101 elfcore_read_notes (abfd
, offset
, size
)
7112 if (bfd_seek (abfd
, offset
, SEEK_SET
) != 0)
7115 buf
= bfd_malloc (size
);
7119 if (bfd_bread (buf
, size
, abfd
) != size
)
7127 while (p
< buf
+ size
)
7129 /* FIXME: bad alignment assumption. */
7130 Elf_External_Note
*xnp
= (Elf_External_Note
*) p
;
7131 Elf_Internal_Note in
;
7133 in
.type
= H_GET_32 (abfd
, xnp
->type
);
7135 in
.namesz
= H_GET_32 (abfd
, xnp
->namesz
);
7136 in
.namedata
= xnp
->name
;
7138 in
.descsz
= H_GET_32 (abfd
, xnp
->descsz
);
7139 in
.descdata
= in
.namedata
+ BFD_ALIGN (in
.namesz
, 4);
7140 in
.descpos
= offset
+ (in
.descdata
- buf
);
7142 if (strncmp (in
.namedata
, "NetBSD-CORE", 11) == 0)
7144 if (! elfcore_grok_netbsd_note (abfd
, &in
))
7149 if (! elfcore_grok_note (abfd
, &in
))
7153 p
= in
.descdata
+ BFD_ALIGN (in
.descsz
, 4);
7160 /* Providing external access to the ELF program header table. */
7162 /* Return an upper bound on the number of bytes required to store a
7163 copy of ABFD's program header table entries. Return -1 if an error
7164 occurs; bfd_get_error will return an appropriate code. */
7167 bfd_get_elf_phdr_upper_bound (abfd
)
7170 if (abfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
7172 bfd_set_error (bfd_error_wrong_format
);
7176 return elf_elfheader (abfd
)->e_phnum
* sizeof (Elf_Internal_Phdr
);
7179 /* Copy ABFD's program header table entries to *PHDRS. The entries
7180 will be stored as an array of Elf_Internal_Phdr structures, as
7181 defined in include/elf/internal.h. To find out how large the
7182 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
7184 Return the number of program header table entries read, or -1 if an
7185 error occurs; bfd_get_error will return an appropriate code. */
7188 bfd_get_elf_phdrs (abfd
, phdrs
)
7194 if (abfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
7196 bfd_set_error (bfd_error_wrong_format
);
7200 num_phdrs
= elf_elfheader (abfd
)->e_phnum
;
7201 memcpy (phdrs
, elf_tdata (abfd
)->phdr
,
7202 num_phdrs
* sizeof (Elf_Internal_Phdr
));
7208 _bfd_elf_sprintf_vma (abfd
, buf
, value
)
7209 bfd
*abfd ATTRIBUTE_UNUSED
;
7214 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
7216 i_ehdrp
= elf_elfheader (abfd
);
7217 if (i_ehdrp
== NULL
)
7218 sprintf_vma (buf
, value
);
7221 if (i_ehdrp
->e_ident
[EI_CLASS
] == ELFCLASS64
)
7223 #if BFD_HOST_64BIT_LONG
7224 sprintf (buf
, "%016lx", value
);
7226 sprintf (buf
, "%08lx%08lx", _bfd_int64_high (value
),
7227 _bfd_int64_low (value
));
7231 sprintf (buf
, "%08lx", (unsigned long) (value
& 0xffffffff));
7234 sprintf_vma (buf
, value
);
7239 _bfd_elf_fprintf_vma (abfd
, stream
, value
)
7240 bfd
*abfd ATTRIBUTE_UNUSED
;
7245 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
7247 i_ehdrp
= elf_elfheader (abfd
);
7248 if (i_ehdrp
== NULL
)
7249 fprintf_vma ((FILE *) stream
, value
);
7252 if (i_ehdrp
->e_ident
[EI_CLASS
] == ELFCLASS64
)
7254 #if BFD_HOST_64BIT_LONG
7255 fprintf ((FILE *) stream
, "%016lx", value
);
7257 fprintf ((FILE *) stream
, "%08lx%08lx",
7258 _bfd_int64_high (value
), _bfd_int64_low (value
));
7262 fprintf ((FILE *) stream
, "%08lx",
7263 (unsigned long) (value
& 0xffffffff));
7266 fprintf_vma ((FILE *) stream
, value
);
7270 enum elf_reloc_type_class
7271 _bfd_elf_reloc_type_class (rela
)
7272 const Elf_Internal_Rela
*rela ATTRIBUTE_UNUSED
;
7274 return reloc_class_normal
;
7277 /* For RELA architectures, return the relocation value for a
7278 relocation against a local symbol. */
7281 _bfd_elf_rela_local_sym (abfd
, sym
, sec
, rel
)
7283 Elf_Internal_Sym
*sym
;
7285 Elf_Internal_Rela
*rel
;
7289 relocation
= (sec
->output_section
->vma
7290 + sec
->output_offset
7292 if ((sec
->flags
& SEC_MERGE
)
7293 && ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
7294 && elf_section_data (sec
)->sec_info_type
== ELF_INFO_TYPE_MERGE
)
7300 _bfd_merged_section_offset (abfd
, &msec
,
7301 elf_section_data (sec
)->sec_info
,
7302 sym
->st_value
+ rel
->r_addend
,
7305 rel
->r_addend
+= msec
->output_section
->vma
+ msec
->output_offset
;
7311 _bfd_elf_rel_local_sym (abfd
, sym
, psec
, addend
)
7313 Elf_Internal_Sym
*sym
;
7317 asection
*sec
= *psec
;
7319 if (elf_section_data (sec
)->sec_info_type
!= ELF_INFO_TYPE_MERGE
)
7320 return sym
->st_value
+ addend
;
7322 return _bfd_merged_section_offset (abfd
, psec
,
7323 elf_section_data (sec
)->sec_info
,
7324 sym
->st_value
+ addend
, (bfd_vma
) 0);
7328 _bfd_elf_section_offset (abfd
, info
, sec
, offset
)
7330 struct bfd_link_info
*info
;
7334 struct bfd_elf_section_data
*sec_data
;
7336 sec_data
= elf_section_data (sec
);
7337 switch (sec_data
->sec_info_type
)
7339 case ELF_INFO_TYPE_STABS
:
7340 return _bfd_stab_section_offset
7341 (abfd
, &elf_hash_table (info
)->merge_info
, sec
, &sec_data
->sec_info
,
7343 case ELF_INFO_TYPE_EH_FRAME
:
7344 return _bfd_elf_eh_frame_section_offset (abfd
, sec
, offset
);