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 /* Elf_Internal_Shdr->contents is an array of these for SHT_GROUP
356 sections. The first element is the flags, the rest are section
359 typedef union elf_internal_group
{
360 Elf_Internal_Shdr
*shdr
;
362 } Elf_Internal_Group
;
364 /* Return the name of the group signature symbol. Why isn't the
365 signature just a string? */
368 group_signature (abfd
, ghdr
)
370 Elf_Internal_Shdr
*ghdr
;
372 struct elf_backend_data
*bed
;
375 Elf_Internal_Shdr
*hdr
;
376 Elf_Internal_Shdr
*shndx_hdr
;
377 unsigned char esym
[sizeof (Elf64_External_Sym
)];
378 Elf_External_Sym_Shndx eshndx
;
379 Elf_Internal_Sym isym
;
381 unsigned int shindex
;
383 /* First we need to ensure the symbol table is available. */
384 if (! bfd_section_from_shdr (abfd
, ghdr
->sh_link
))
387 /* Go read the symbol. */
388 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
389 bed
= get_elf_backend_data (abfd
);
390 amt
= bed
->s
->sizeof_sym
;
391 pos
= hdr
->sh_offset
+ ghdr
->sh_info
* amt
;
392 if (bfd_seek (abfd
, pos
, SEEK_SET
) != 0
393 || bfd_bread (esym
, amt
, abfd
) != amt
)
396 /* And possibly the symbol section index extension. */
397 shndx_hdr
= &elf_tdata (abfd
)->symtab_shndx_hdr
;
398 if (elf_elfsections (abfd
) != NULL
399 && elf_elfsections (abfd
)[shndx_hdr
->sh_link
] == hdr
)
401 amt
= sizeof (Elf_External_Sym_Shndx
);
402 pos
= shndx_hdr
->sh_offset
+ ghdr
->sh_info
* amt
;
403 if (bfd_seek (abfd
, pos
, SEEK_SET
) != 0
404 || bfd_bread ((PTR
) &eshndx
, amt
, abfd
) != amt
)
408 /* Convert to internal format. */
409 (*bed
->s
->swap_symbol_in
) (abfd
, (const PTR
*) &esym
, (const PTR
*) &eshndx
,
412 /* Look up the symbol name. */
413 iname
= isym
.st_name
;
414 shindex
= hdr
->sh_link
;
415 if (iname
== 0 && ELF_ST_TYPE (isym
.st_info
) == STT_SECTION
)
417 iname
= elf_elfsections (abfd
)[isym
.st_shndx
]->sh_name
;
418 shindex
= elf_elfheader (abfd
)->e_shstrndx
;
421 return bfd_elf_string_from_elf_section (abfd
, shindex
, iname
);
424 /* Set next_in_group list pointer, and group name for NEWSECT. */
427 setup_group (abfd
, hdr
, newsect
)
429 Elf_Internal_Shdr
*hdr
;
432 unsigned int num_group
= elf_tdata (abfd
)->num_group
;
434 /* If num_group is zero, read in all SHT_GROUP sections. The count
435 is set to -1 if there are no SHT_GROUP sections. */
438 unsigned int i
, shnum
;
440 /* First count the number of groups. If we have a SHT_GROUP
441 section with just a flag word (ie. sh_size is 4), ignore it. */
442 shnum
= elf_numsections (abfd
);
444 for (i
= 0; i
< shnum
; i
++)
446 Elf_Internal_Shdr
*shdr
= elf_elfsections (abfd
)[i
];
447 if (shdr
->sh_type
== SHT_GROUP
&& shdr
->sh_size
>= 8)
452 num_group
= (unsigned) -1;
453 elf_tdata (abfd
)->num_group
= num_group
;
457 /* We keep a list of elf section headers for group sections,
458 so we can find them quickly. */
459 bfd_size_type amt
= num_group
* sizeof (Elf_Internal_Shdr
*);
460 elf_tdata (abfd
)->group_sect_ptr
= bfd_alloc (abfd
, amt
);
461 if (elf_tdata (abfd
)->group_sect_ptr
== NULL
)
465 for (i
= 0; i
< shnum
; i
++)
467 Elf_Internal_Shdr
*shdr
= elf_elfsections (abfd
)[i
];
468 if (shdr
->sh_type
== SHT_GROUP
&& shdr
->sh_size
>= 8)
471 Elf_Internal_Group
*dest
;
473 /* Add to list of sections. */
474 elf_tdata (abfd
)->group_sect_ptr
[num_group
] = shdr
;
477 /* Read the raw contents. */
478 BFD_ASSERT (sizeof (*dest
) >= 4);
479 amt
= shdr
->sh_size
* sizeof (*dest
) / 4;
480 shdr
->contents
= bfd_alloc (abfd
, amt
);
481 if (shdr
->contents
== NULL
482 || bfd_seek (abfd
, shdr
->sh_offset
, SEEK_SET
) != 0
483 || (bfd_bread (shdr
->contents
, shdr
->sh_size
, abfd
)
487 /* Translate raw contents, a flag word followed by an
488 array of elf section indices all in target byte order,
489 to the flag word followed by an array of elf section
491 src
= shdr
->contents
+ shdr
->sh_size
;
492 dest
= (Elf_Internal_Group
*) (shdr
->contents
+ amt
);
499 idx
= H_GET_32 (abfd
, src
);
500 if (src
== shdr
->contents
)
503 if (shdr
->bfd_section
!= NULL
&& (idx
& GRP_COMDAT
))
504 shdr
->bfd_section
->flags
505 |= SEC_LINK_ONCE
| SEC_LINK_DUPLICATES_DISCARD
;
510 ((*_bfd_error_handler
)
511 (_("%s: invalid SHT_GROUP entry"),
512 bfd_archive_filename (abfd
)));
515 dest
->shdr
= elf_elfsections (abfd
)[idx
];
522 if (num_group
!= (unsigned) -1)
526 for (i
= 0; i
< num_group
; i
++)
528 Elf_Internal_Shdr
*shdr
= elf_tdata (abfd
)->group_sect_ptr
[i
];
529 Elf_Internal_Group
*idx
= (Elf_Internal_Group
*) shdr
->contents
;
530 unsigned int n_elt
= shdr
->sh_size
/ 4;
532 /* Look through this group's sections to see if current
533 section is a member. */
535 if ((++idx
)->shdr
== hdr
)
539 /* We are a member of this group. Go looking through
540 other members to see if any others are linked via
542 idx
= (Elf_Internal_Group
*) shdr
->contents
;
543 n_elt
= shdr
->sh_size
/ 4;
545 if ((s
= (++idx
)->shdr
->bfd_section
) != NULL
546 && elf_next_in_group (s
) != NULL
)
550 /* Snarf the group name from other member, and
551 insert current section in circular list. */
552 elf_group_name (newsect
) = elf_group_name (s
);
553 elf_next_in_group (newsect
) = elf_next_in_group (s
);
554 elf_next_in_group (s
) = newsect
;
560 gname
= group_signature (abfd
, shdr
);
563 elf_group_name (newsect
) = gname
;
565 /* Start a circular list with one element. */
566 elf_next_in_group (newsect
) = newsect
;
569 /* If the group section has been created, point to the
571 if (shdr
->bfd_section
!= NULL
)
572 elf_next_in_group (shdr
->bfd_section
) = newsect
;
580 if (elf_group_name (newsect
) == NULL
)
582 (*_bfd_error_handler
) (_("%s: no group info for section %s"),
583 bfd_archive_filename (abfd
), newsect
->name
);
589 bfd_elf_discard_group (abfd
, group
)
590 bfd
*abfd ATTRIBUTE_UNUSED
;
593 asection
*first
= elf_next_in_group (group
);
598 s
->output_section
= bfd_abs_section_ptr
;
599 s
= elf_next_in_group (s
);
600 /* These lists are circular. */
607 /* Make a BFD section from an ELF section. We store a pointer to the
608 BFD section in the bfd_section field of the header. */
611 _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
)
613 Elf_Internal_Shdr
*hdr
;
618 struct elf_backend_data
*bed
;
620 if (hdr
->bfd_section
!= NULL
)
622 BFD_ASSERT (strcmp (name
,
623 bfd_get_section_name (abfd
, hdr
->bfd_section
)) == 0);
627 newsect
= bfd_make_section_anyway (abfd
, name
);
631 newsect
->filepos
= hdr
->sh_offset
;
633 if (! bfd_set_section_vma (abfd
, newsect
, hdr
->sh_addr
)
634 || ! bfd_set_section_size (abfd
, newsect
, hdr
->sh_size
)
635 || ! bfd_set_section_alignment (abfd
, newsect
,
636 bfd_log2 ((bfd_vma
) hdr
->sh_addralign
)))
639 flags
= SEC_NO_FLAGS
;
640 if (hdr
->sh_type
!= SHT_NOBITS
)
641 flags
|= SEC_HAS_CONTENTS
;
642 if (hdr
->sh_type
== SHT_GROUP
)
643 flags
|= SEC_GROUP
| SEC_EXCLUDE
;
644 if ((hdr
->sh_flags
& SHF_ALLOC
) != 0)
647 if (hdr
->sh_type
!= SHT_NOBITS
)
650 if ((hdr
->sh_flags
& SHF_WRITE
) == 0)
651 flags
|= SEC_READONLY
;
652 if ((hdr
->sh_flags
& SHF_EXECINSTR
) != 0)
654 else if ((flags
& SEC_LOAD
) != 0)
656 if ((hdr
->sh_flags
& SHF_MERGE
) != 0)
659 newsect
->entsize
= hdr
->sh_entsize
;
660 if ((hdr
->sh_flags
& SHF_STRINGS
) != 0)
661 flags
|= SEC_STRINGS
;
663 if (hdr
->sh_flags
& SHF_GROUP
)
664 if (!setup_group (abfd
, hdr
, newsect
))
666 if ((hdr
->sh_flags
& SHF_TLS
) != 0)
667 flags
|= SEC_THREAD_LOCAL
;
669 /* The debugging sections appear to be recognized only by name, not
672 static const char *debug_sec_names
[] =
681 for (i
= ARRAY_SIZE (debug_sec_names
); i
--;)
682 if (strncmp (name
, debug_sec_names
[i
], strlen (debug_sec_names
[i
])) == 0)
686 flags
|= SEC_DEBUGGING
;
689 /* As a GNU extension, if the name begins with .gnu.linkonce, we
690 only link a single copy of the section. This is used to support
691 g++. g++ will emit each template expansion in its own section.
692 The symbols will be defined as weak, so that multiple definitions
693 are permitted. The GNU linker extension is to actually discard
694 all but one of the sections. */
695 if (strncmp (name
, ".gnu.linkonce", sizeof ".gnu.linkonce" - 1) == 0
696 && elf_next_in_group (newsect
) == NULL
)
697 flags
|= SEC_LINK_ONCE
| SEC_LINK_DUPLICATES_DISCARD
;
699 bed
= get_elf_backend_data (abfd
);
700 if (bed
->elf_backend_section_flags
)
701 if (! bed
->elf_backend_section_flags (&flags
, hdr
))
704 if (! bfd_set_section_flags (abfd
, newsect
, flags
))
707 if ((flags
& SEC_ALLOC
) != 0)
709 Elf_Internal_Phdr
*phdr
;
712 /* Look through the phdrs to see if we need to adjust the lma.
713 If all the p_paddr fields are zero, we ignore them, since
714 some ELF linkers produce such output. */
715 phdr
= elf_tdata (abfd
)->phdr
;
716 for (i
= 0; i
< elf_elfheader (abfd
)->e_phnum
; i
++, phdr
++)
718 if (phdr
->p_paddr
!= 0)
721 if (i
< elf_elfheader (abfd
)->e_phnum
)
723 phdr
= elf_tdata (abfd
)->phdr
;
724 for (i
= 0; i
< elf_elfheader (abfd
)->e_phnum
; i
++, phdr
++)
726 /* This section is part of this segment if its file
727 offset plus size lies within the segment's memory
728 span and, if the section is loaded, the extent of the
729 loaded data lies within the extent of the segment.
731 Note - we used to check the p_paddr field as well, and
732 refuse to set the LMA if it was 0. This is wrong
733 though, as a perfectly valid initialised segment can
734 have a p_paddr of zero. Some architectures, eg ARM,
735 place special significance on the address 0 and
736 executables need to be able to have a segment which
737 covers this address. */
738 if (phdr
->p_type
== PT_LOAD
739 && (bfd_vma
) hdr
->sh_offset
>= phdr
->p_offset
740 && (hdr
->sh_offset
+ hdr
->sh_size
741 <= phdr
->p_offset
+ phdr
->p_memsz
)
742 && ((flags
& SEC_LOAD
) == 0
743 || (hdr
->sh_offset
+ hdr
->sh_size
744 <= phdr
->p_offset
+ phdr
->p_filesz
)))
746 if ((flags
& SEC_LOAD
) == 0)
747 newsect
->lma
= (phdr
->p_paddr
748 + hdr
->sh_addr
- phdr
->p_vaddr
);
750 /* We used to use the same adjustment for SEC_LOAD
751 sections, but that doesn't work if the segment
752 is packed with code from multiple VMAs.
753 Instead we calculate the section LMA based on
754 the segment LMA. It is assumed that the
755 segment will contain sections with contiguous
756 LMAs, even if the VMAs are not. */
757 newsect
->lma
= (phdr
->p_paddr
758 + hdr
->sh_offset
- phdr
->p_offset
);
760 /* With contiguous segments, we can't tell from file
761 offsets whether a section with zero size should
762 be placed at the end of one segment or the
763 beginning of the next. Decide based on vaddr. */
764 if (hdr
->sh_addr
>= phdr
->p_vaddr
765 && (hdr
->sh_addr
+ hdr
->sh_size
766 <= phdr
->p_vaddr
+ phdr
->p_memsz
))
773 hdr
->bfd_section
= newsect
;
774 elf_section_data (newsect
)->this_hdr
= *hdr
;
784 struct elf_internal_shdr *bfd_elf_find_section (bfd *abfd, char *name);
787 Helper functions for GDB to locate the string tables.
788 Since BFD hides string tables from callers, GDB needs to use an
789 internal hook to find them. Sun's .stabstr, in particular,
790 isn't even pointed to by the .stab section, so ordinary
791 mechanisms wouldn't work to find it, even if we had some.
794 struct elf_internal_shdr
*
795 bfd_elf_find_section (abfd
, name
)
799 Elf_Internal_Shdr
**i_shdrp
;
804 i_shdrp
= elf_elfsections (abfd
);
807 shstrtab
= bfd_elf_get_str_section (abfd
,
808 elf_elfheader (abfd
)->e_shstrndx
);
809 if (shstrtab
!= NULL
)
811 max
= elf_numsections (abfd
);
812 for (i
= 1; i
< max
; i
++)
813 if (!strcmp (&shstrtab
[i_shdrp
[i
]->sh_name
], name
))
820 const char *const bfd_elf_section_type_names
[] = {
821 "SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB",
822 "SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE",
823 "SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM",
826 /* ELF relocs are against symbols. If we are producing relocateable
827 output, and the reloc is against an external symbol, and nothing
828 has given us any additional addend, the resulting reloc will also
829 be against the same symbol. In such a case, we don't want to
830 change anything about the way the reloc is handled, since it will
831 all be done at final link time. Rather than put special case code
832 into bfd_perform_relocation, all the reloc types use this howto
833 function. It just short circuits the reloc if producing
834 relocateable output against an external symbol. */
836 bfd_reloc_status_type
837 bfd_elf_generic_reloc (abfd
,
844 bfd
*abfd ATTRIBUTE_UNUSED
;
845 arelent
*reloc_entry
;
847 PTR data ATTRIBUTE_UNUSED
;
848 asection
*input_section
;
850 char **error_message ATTRIBUTE_UNUSED
;
852 if (output_bfd
!= (bfd
*) NULL
853 && (symbol
->flags
& BSF_SECTION_SYM
) == 0
854 && (! reloc_entry
->howto
->partial_inplace
855 || reloc_entry
->addend
== 0))
857 reloc_entry
->address
+= input_section
->output_offset
;
861 return bfd_reloc_continue
;
864 /* Make sure sec_info_type is cleared if sec_info is cleared too. */
867 merge_sections_remove_hook (abfd
, sec
)
868 bfd
*abfd ATTRIBUTE_UNUSED
;
871 struct bfd_elf_section_data
*sec_data
;
873 sec_data
= elf_section_data (sec
);
874 BFD_ASSERT (sec_data
->sec_info_type
== ELF_INFO_TYPE_MERGE
);
875 sec_data
->sec_info_type
= ELF_INFO_TYPE_NONE
;
878 /* Finish SHF_MERGE section merging. */
881 _bfd_elf_merge_sections (abfd
, info
)
883 struct bfd_link_info
*info
;
885 if (!is_elf_hash_table (info
))
887 if (elf_hash_table (info
)->merge_info
)
888 _bfd_merge_sections (abfd
, elf_hash_table (info
)->merge_info
,
889 merge_sections_remove_hook
);
894 _bfd_elf_link_just_syms (sec
, info
)
896 struct bfd_link_info
*info
;
898 sec
->output_section
= bfd_abs_section_ptr
;
899 sec
->output_offset
= sec
->vma
;
900 if (!is_elf_hash_table (info
))
903 elf_section_data (sec
)->sec_info_type
= ELF_INFO_TYPE_JUST_SYMS
;
906 /* Copy the program header and other data from one object module to
910 _bfd_elf_copy_private_bfd_data (ibfd
, obfd
)
914 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
915 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
918 BFD_ASSERT (!elf_flags_init (obfd
)
919 || (elf_elfheader (obfd
)->e_flags
920 == elf_elfheader (ibfd
)->e_flags
));
922 elf_gp (obfd
) = elf_gp (ibfd
);
923 elf_elfheader (obfd
)->e_flags
= elf_elfheader (ibfd
)->e_flags
;
924 elf_flags_init (obfd
) = true;
928 /* Print out the program headers. */
931 _bfd_elf_print_private_bfd_data (abfd
, farg
)
935 FILE *f
= (FILE *) farg
;
936 Elf_Internal_Phdr
*p
;
938 bfd_byte
*dynbuf
= NULL
;
940 p
= elf_tdata (abfd
)->phdr
;
945 fprintf (f
, _("\nProgram Header:\n"));
946 c
= elf_elfheader (abfd
)->e_phnum
;
947 for (i
= 0; i
< c
; i
++, p
++)
954 case PT_NULL
: pt
= "NULL"; break;
955 case PT_LOAD
: pt
= "LOAD"; break;
956 case PT_DYNAMIC
: pt
= "DYNAMIC"; break;
957 case PT_INTERP
: pt
= "INTERP"; break;
958 case PT_NOTE
: pt
= "NOTE"; break;
959 case PT_SHLIB
: pt
= "SHLIB"; break;
960 case PT_PHDR
: pt
= "PHDR"; break;
961 case PT_TLS
: pt
= "TLS"; break;
962 case PT_GNU_EH_FRAME
: pt
= "EH_FRAME"; break;
963 default: sprintf (buf
, "0x%lx", p
->p_type
); pt
= buf
; break;
965 fprintf (f
, "%8s off 0x", pt
);
966 bfd_fprintf_vma (abfd
, f
, p
->p_offset
);
967 fprintf (f
, " vaddr 0x");
968 bfd_fprintf_vma (abfd
, f
, p
->p_vaddr
);
969 fprintf (f
, " paddr 0x");
970 bfd_fprintf_vma (abfd
, f
, p
->p_paddr
);
971 fprintf (f
, " align 2**%u\n", bfd_log2 (p
->p_align
));
972 fprintf (f
, " filesz 0x");
973 bfd_fprintf_vma (abfd
, f
, p
->p_filesz
);
974 fprintf (f
, " memsz 0x");
975 bfd_fprintf_vma (abfd
, f
, p
->p_memsz
);
976 fprintf (f
, " flags %c%c%c",
977 (p
->p_flags
& PF_R
) != 0 ? 'r' : '-',
978 (p
->p_flags
& PF_W
) != 0 ? 'w' : '-',
979 (p
->p_flags
& PF_X
) != 0 ? 'x' : '-');
980 if ((p
->p_flags
&~ (unsigned) (PF_R
| PF_W
| PF_X
)) != 0)
981 fprintf (f
, " %lx", p
->p_flags
&~ (unsigned) (PF_R
| PF_W
| PF_X
));
986 s
= bfd_get_section_by_name (abfd
, ".dynamic");
990 unsigned long shlink
;
991 bfd_byte
*extdyn
, *extdynend
;
993 void (*swap_dyn_in
) PARAMS ((bfd
*, const PTR
, Elf_Internal_Dyn
*));
995 fprintf (f
, _("\nDynamic Section:\n"));
997 dynbuf
= (bfd_byte
*) bfd_malloc (s
->_raw_size
);
1000 if (! bfd_get_section_contents (abfd
, s
, (PTR
) dynbuf
, (file_ptr
) 0,
1004 elfsec
= _bfd_elf_section_from_bfd_section (abfd
, s
);
1007 shlink
= elf_elfsections (abfd
)[elfsec
]->sh_link
;
1009 extdynsize
= get_elf_backend_data (abfd
)->s
->sizeof_dyn
;
1010 swap_dyn_in
= get_elf_backend_data (abfd
)->s
->swap_dyn_in
;
1013 extdynend
= extdyn
+ s
->_raw_size
;
1014 for (; extdyn
< extdynend
; extdyn
+= extdynsize
)
1016 Elf_Internal_Dyn dyn
;
1021 (*swap_dyn_in
) (abfd
, (PTR
) extdyn
, &dyn
);
1023 if (dyn
.d_tag
== DT_NULL
)
1030 sprintf (ab
, "0x%lx", (unsigned long) dyn
.d_tag
);
1034 case DT_NEEDED
: name
= "NEEDED"; stringp
= true; break;
1035 case DT_PLTRELSZ
: name
= "PLTRELSZ"; break;
1036 case DT_PLTGOT
: name
= "PLTGOT"; break;
1037 case DT_HASH
: name
= "HASH"; break;
1038 case DT_STRTAB
: name
= "STRTAB"; break;
1039 case DT_SYMTAB
: name
= "SYMTAB"; break;
1040 case DT_RELA
: name
= "RELA"; break;
1041 case DT_RELASZ
: name
= "RELASZ"; break;
1042 case DT_RELAENT
: name
= "RELAENT"; break;
1043 case DT_STRSZ
: name
= "STRSZ"; break;
1044 case DT_SYMENT
: name
= "SYMENT"; break;
1045 case DT_INIT
: name
= "INIT"; break;
1046 case DT_FINI
: name
= "FINI"; break;
1047 case DT_SONAME
: name
= "SONAME"; stringp
= true; break;
1048 case DT_RPATH
: name
= "RPATH"; stringp
= true; break;
1049 case DT_SYMBOLIC
: name
= "SYMBOLIC"; break;
1050 case DT_REL
: name
= "REL"; break;
1051 case DT_RELSZ
: name
= "RELSZ"; break;
1052 case DT_RELENT
: name
= "RELENT"; break;
1053 case DT_PLTREL
: name
= "PLTREL"; break;
1054 case DT_DEBUG
: name
= "DEBUG"; break;
1055 case DT_TEXTREL
: name
= "TEXTREL"; break;
1056 case DT_JMPREL
: name
= "JMPREL"; break;
1057 case DT_BIND_NOW
: name
= "BIND_NOW"; break;
1058 case DT_INIT_ARRAY
: name
= "INIT_ARRAY"; break;
1059 case DT_FINI_ARRAY
: name
= "FINI_ARRAY"; break;
1060 case DT_INIT_ARRAYSZ
: name
= "INIT_ARRAYSZ"; break;
1061 case DT_FINI_ARRAYSZ
: name
= "FINI_ARRAYSZ"; break;
1062 case DT_RUNPATH
: name
= "RUNPATH"; stringp
= true; break;
1063 case DT_FLAGS
: name
= "FLAGS"; break;
1064 case DT_PREINIT_ARRAY
: name
= "PREINIT_ARRAY"; break;
1065 case DT_PREINIT_ARRAYSZ
: name
= "PREINIT_ARRAYSZ"; break;
1066 case DT_CHECKSUM
: name
= "CHECKSUM"; break;
1067 case DT_PLTPADSZ
: name
= "PLTPADSZ"; break;
1068 case DT_MOVEENT
: name
= "MOVEENT"; break;
1069 case DT_MOVESZ
: name
= "MOVESZ"; break;
1070 case DT_FEATURE
: name
= "FEATURE"; break;
1071 case DT_POSFLAG_1
: name
= "POSFLAG_1"; break;
1072 case DT_SYMINSZ
: name
= "SYMINSZ"; break;
1073 case DT_SYMINENT
: name
= "SYMINENT"; break;
1074 case DT_CONFIG
: name
= "CONFIG"; stringp
= true; break;
1075 case DT_DEPAUDIT
: name
= "DEPAUDIT"; stringp
= true; break;
1076 case DT_AUDIT
: name
= "AUDIT"; stringp
= true; break;
1077 case DT_PLTPAD
: name
= "PLTPAD"; break;
1078 case DT_MOVETAB
: name
= "MOVETAB"; break;
1079 case DT_SYMINFO
: name
= "SYMINFO"; break;
1080 case DT_RELACOUNT
: name
= "RELACOUNT"; break;
1081 case DT_RELCOUNT
: name
= "RELCOUNT"; break;
1082 case DT_FLAGS_1
: name
= "FLAGS_1"; break;
1083 case DT_VERSYM
: name
= "VERSYM"; break;
1084 case DT_VERDEF
: name
= "VERDEF"; break;
1085 case DT_VERDEFNUM
: name
= "VERDEFNUM"; break;
1086 case DT_VERNEED
: name
= "VERNEED"; break;
1087 case DT_VERNEEDNUM
: name
= "VERNEEDNUM"; break;
1088 case DT_AUXILIARY
: name
= "AUXILIARY"; stringp
= true; break;
1089 case DT_USED
: name
= "USED"; break;
1090 case DT_FILTER
: name
= "FILTER"; stringp
= true; break;
1093 fprintf (f
, " %-11s ", name
);
1095 fprintf (f
, "0x%lx", (unsigned long) dyn
.d_un
.d_val
);
1099 unsigned int tagv
= dyn
.d_un
.d_val
;
1101 string
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
1104 fprintf (f
, "%s", string
);
1113 if ((elf_dynverdef (abfd
) != 0 && elf_tdata (abfd
)->verdef
== NULL
)
1114 || (elf_dynverref (abfd
) != 0 && elf_tdata (abfd
)->verref
== NULL
))
1116 if (! _bfd_elf_slurp_version_tables (abfd
))
1120 if (elf_dynverdef (abfd
) != 0)
1122 Elf_Internal_Verdef
*t
;
1124 fprintf (f
, _("\nVersion definitions:\n"));
1125 for (t
= elf_tdata (abfd
)->verdef
; t
!= NULL
; t
= t
->vd_nextdef
)
1127 fprintf (f
, "%d 0x%2.2x 0x%8.8lx %s\n", t
->vd_ndx
,
1128 t
->vd_flags
, t
->vd_hash
, t
->vd_nodename
);
1129 if (t
->vd_auxptr
->vda_nextptr
!= NULL
)
1131 Elf_Internal_Verdaux
*a
;
1134 for (a
= t
->vd_auxptr
->vda_nextptr
;
1137 fprintf (f
, "%s ", a
->vda_nodename
);
1143 if (elf_dynverref (abfd
) != 0)
1145 Elf_Internal_Verneed
*t
;
1147 fprintf (f
, _("\nVersion References:\n"));
1148 for (t
= elf_tdata (abfd
)->verref
; t
!= NULL
; t
= t
->vn_nextref
)
1150 Elf_Internal_Vernaux
*a
;
1152 fprintf (f
, _(" required from %s:\n"), t
->vn_filename
);
1153 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
1154 fprintf (f
, " 0x%8.8lx 0x%2.2x %2.2d %s\n", a
->vna_hash
,
1155 a
->vna_flags
, a
->vna_other
, a
->vna_nodename
);
1167 /* Display ELF-specific fields of a symbol. */
1170 bfd_elf_print_symbol (abfd
, filep
, symbol
, how
)
1174 bfd_print_symbol_type how
;
1176 FILE *file
= (FILE *) filep
;
1179 case bfd_print_symbol_name
:
1180 fprintf (file
, "%s", symbol
->name
);
1182 case bfd_print_symbol_more
:
1183 fprintf (file
, "elf ");
1184 bfd_fprintf_vma (abfd
, file
, symbol
->value
);
1185 fprintf (file
, " %lx", (long) symbol
->flags
);
1187 case bfd_print_symbol_all
:
1189 const char *section_name
;
1190 const char *name
= NULL
;
1191 struct elf_backend_data
*bed
;
1192 unsigned char st_other
;
1195 section_name
= symbol
->section
? symbol
->section
->name
: "(*none*)";
1197 bed
= get_elf_backend_data (abfd
);
1198 if (bed
->elf_backend_print_symbol_all
)
1199 name
= (*bed
->elf_backend_print_symbol_all
) (abfd
, filep
, symbol
);
1203 name
= symbol
->name
;
1204 bfd_print_symbol_vandf (abfd
, (PTR
) file
, symbol
);
1207 fprintf (file
, " %s\t", section_name
);
1208 /* Print the "other" value for a symbol. For common symbols,
1209 we've already printed the size; now print the alignment.
1210 For other symbols, we have no specified alignment, and
1211 we've printed the address; now print the size. */
1212 if (bfd_is_com_section (symbol
->section
))
1213 val
= ((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_value
;
1215 val
= ((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_size
;
1216 bfd_fprintf_vma (abfd
, file
, val
);
1218 /* If we have version information, print it. */
1219 if (elf_tdata (abfd
)->dynversym_section
!= 0
1220 && (elf_tdata (abfd
)->dynverdef_section
!= 0
1221 || elf_tdata (abfd
)->dynverref_section
!= 0))
1223 unsigned int vernum
;
1224 const char *version_string
;
1226 vernum
= ((elf_symbol_type
*) symbol
)->version
& VERSYM_VERSION
;
1229 version_string
= "";
1230 else if (vernum
== 1)
1231 version_string
= "Base";
1232 else if (vernum
<= elf_tdata (abfd
)->cverdefs
)
1234 elf_tdata (abfd
)->verdef
[vernum
- 1].vd_nodename
;
1237 Elf_Internal_Verneed
*t
;
1239 version_string
= "";
1240 for (t
= elf_tdata (abfd
)->verref
;
1244 Elf_Internal_Vernaux
*a
;
1246 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
1248 if (a
->vna_other
== vernum
)
1250 version_string
= a
->vna_nodename
;
1257 if ((((elf_symbol_type
*) symbol
)->version
& VERSYM_HIDDEN
) == 0)
1258 fprintf (file
, " %-11s", version_string
);
1263 fprintf (file
, " (%s)", version_string
);
1264 for (i
= 10 - strlen (version_string
); i
> 0; --i
)
1269 /* If the st_other field is not zero, print it. */
1270 st_other
= ((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_other
;
1275 case STV_INTERNAL
: fprintf (file
, " .internal"); break;
1276 case STV_HIDDEN
: fprintf (file
, " .hidden"); break;
1277 case STV_PROTECTED
: fprintf (file
, " .protected"); break;
1279 /* Some other non-defined flags are also present, so print
1281 fprintf (file
, " 0x%02x", (unsigned int) st_other
);
1284 fprintf (file
, " %s", name
);
1290 /* Create an entry in an ELF linker hash table. */
1292 struct bfd_hash_entry
*
1293 _bfd_elf_link_hash_newfunc (entry
, table
, string
)
1294 struct bfd_hash_entry
*entry
;
1295 struct bfd_hash_table
*table
;
1298 /* Allocate the structure if it has not already been allocated by a
1302 entry
= bfd_hash_allocate (table
, sizeof (struct elf_link_hash_entry
));
1307 /* Call the allocation method of the superclass. */
1308 entry
= _bfd_link_hash_newfunc (entry
, table
, string
);
1311 struct elf_link_hash_entry
*ret
= (struct elf_link_hash_entry
*) entry
;
1312 struct elf_link_hash_table
*htab
= (struct elf_link_hash_table
*) table
;
1314 /* Set local fields. */
1318 ret
->dynstr_index
= 0;
1319 ret
->weakdef
= NULL
;
1320 ret
->got
.refcount
= htab
->init_refcount
;
1321 ret
->plt
.refcount
= htab
->init_refcount
;
1322 ret
->linker_section_pointer
= NULL
;
1323 ret
->verinfo
.verdef
= NULL
;
1324 ret
->vtable_entries_used
= NULL
;
1325 ret
->vtable_entries_size
= 0;
1326 ret
->vtable_parent
= NULL
;
1327 ret
->type
= STT_NOTYPE
;
1329 /* Assume that we have been called by a non-ELF symbol reader.
1330 This flag is then reset by the code which reads an ELF input
1331 file. This ensures that a symbol created by a non-ELF symbol
1332 reader will have the flag set correctly. */
1333 ret
->elf_link_hash_flags
= ELF_LINK_NON_ELF
;
1339 /* Copy data from an indirect symbol to its direct symbol, hiding the
1340 old indirect symbol. Also used for copying flags to a weakdef. */
1343 _bfd_elf_link_hash_copy_indirect (dir
, ind
)
1344 struct elf_link_hash_entry
*dir
, *ind
;
1348 /* Copy down any references that we may have already seen to the
1349 symbol which just became indirect. */
1351 dir
->elf_link_hash_flags
|=
1352 (ind
->elf_link_hash_flags
1353 & (ELF_LINK_HASH_REF_DYNAMIC
1354 | ELF_LINK_HASH_REF_REGULAR
1355 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
1356 | ELF_LINK_NON_GOT_REF
));
1358 if (ind
->root
.type
!= bfd_link_hash_indirect
)
1361 /* Copy over the global and procedure linkage table refcount entries.
1362 These may have been already set up by a check_relocs routine. */
1363 tmp
= dir
->got
.refcount
;
1366 dir
->got
.refcount
= ind
->got
.refcount
;
1367 ind
->got
.refcount
= tmp
;
1370 BFD_ASSERT (ind
->got
.refcount
<= 0);
1372 tmp
= dir
->plt
.refcount
;
1375 dir
->plt
.refcount
= ind
->plt
.refcount
;
1376 ind
->plt
.refcount
= tmp
;
1379 BFD_ASSERT (ind
->plt
.refcount
<= 0);
1381 if (dir
->dynindx
== -1)
1383 dir
->dynindx
= ind
->dynindx
;
1384 dir
->dynstr_index
= ind
->dynstr_index
;
1386 ind
->dynstr_index
= 0;
1389 BFD_ASSERT (ind
->dynindx
== -1);
1393 _bfd_elf_link_hash_hide_symbol (info
, h
, force_local
)
1394 struct bfd_link_info
*info
;
1395 struct elf_link_hash_entry
*h
;
1396 boolean force_local
;
1398 h
->plt
.offset
= (bfd_vma
) -1;
1399 h
->elf_link_hash_flags
&= ~ELF_LINK_HASH_NEEDS_PLT
;
1402 h
->elf_link_hash_flags
|= ELF_LINK_FORCED_LOCAL
;
1403 if (h
->dynindx
!= -1)
1406 _bfd_elf_strtab_delref (elf_hash_table (info
)->dynstr
,
1412 /* Initialize an ELF linker hash table. */
1415 _bfd_elf_link_hash_table_init (table
, abfd
, newfunc
)
1416 struct elf_link_hash_table
*table
;
1418 struct bfd_hash_entry
*(*newfunc
) PARAMS ((struct bfd_hash_entry
*,
1419 struct bfd_hash_table
*,
1424 table
->dynamic_sections_created
= false;
1425 table
->dynobj
= NULL
;
1426 table
->init_refcount
= get_elf_backend_data (abfd
)->can_refcount
- 1;
1427 /* The first dynamic symbol is a dummy. */
1428 table
->dynsymcount
= 1;
1429 table
->dynstr
= NULL
;
1430 table
->bucketcount
= 0;
1431 table
->needed
= NULL
;
1432 table
->runpath
= NULL
;
1433 table
->loaded
= NULL
;
1435 table
->stab_info
= NULL
;
1436 table
->merge_info
= NULL
;
1437 table
->dynlocal
= NULL
;
1438 ret
= _bfd_link_hash_table_init (& table
->root
, abfd
, newfunc
);
1439 table
->root
.type
= bfd_link_elf_hash_table
;
1444 /* Create an ELF linker hash table. */
1446 struct bfd_link_hash_table
*
1447 _bfd_elf_link_hash_table_create (abfd
)
1450 struct elf_link_hash_table
*ret
;
1451 bfd_size_type amt
= sizeof (struct elf_link_hash_table
);
1453 ret
= (struct elf_link_hash_table
*) bfd_malloc (amt
);
1454 if (ret
== (struct elf_link_hash_table
*) NULL
)
1457 if (! _bfd_elf_link_hash_table_init (ret
, abfd
, _bfd_elf_link_hash_newfunc
))
1466 /* This is a hook for the ELF emulation code in the generic linker to
1467 tell the backend linker what file name to use for the DT_NEEDED
1468 entry for a dynamic object. The generic linker passes name as an
1469 empty string to indicate that no DT_NEEDED entry should be made. */
1472 bfd_elf_set_dt_needed_name (abfd
, name
)
1476 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1477 && bfd_get_format (abfd
) == bfd_object
)
1478 elf_dt_name (abfd
) = name
;
1482 bfd_elf_set_dt_needed_soname (abfd
, name
)
1486 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1487 && bfd_get_format (abfd
) == bfd_object
)
1488 elf_dt_soname (abfd
) = name
;
1491 /* Get the list of DT_NEEDED entries for a link. This is a hook for
1492 the linker ELF emulation code. */
1494 struct bfd_link_needed_list
*
1495 bfd_elf_get_needed_list (abfd
, info
)
1496 bfd
*abfd ATTRIBUTE_UNUSED
;
1497 struct bfd_link_info
*info
;
1499 if (info
->hash
->creator
->flavour
!= bfd_target_elf_flavour
)
1501 return elf_hash_table (info
)->needed
;
1504 /* Get the list of DT_RPATH/DT_RUNPATH entries for a link. This is a
1505 hook for the linker ELF emulation code. */
1507 struct bfd_link_needed_list
*
1508 bfd_elf_get_runpath_list (abfd
, info
)
1509 bfd
*abfd ATTRIBUTE_UNUSED
;
1510 struct bfd_link_info
*info
;
1512 if (info
->hash
->creator
->flavour
!= bfd_target_elf_flavour
)
1514 return elf_hash_table (info
)->runpath
;
1517 /* Get the name actually used for a dynamic object for a link. This
1518 is the SONAME entry if there is one. Otherwise, it is the string
1519 passed to bfd_elf_set_dt_needed_name, or it is the filename. */
1522 bfd_elf_get_dt_soname (abfd
)
1525 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1526 && bfd_get_format (abfd
) == bfd_object
)
1527 return elf_dt_name (abfd
);
1531 /* Get the list of DT_NEEDED entries from a BFD. This is a hook for
1532 the ELF linker emulation code. */
1535 bfd_elf_get_bfd_needed_list (abfd
, pneeded
)
1537 struct bfd_link_needed_list
**pneeded
;
1540 bfd_byte
*dynbuf
= NULL
;
1542 unsigned long shlink
;
1543 bfd_byte
*extdyn
, *extdynend
;
1545 void (*swap_dyn_in
) PARAMS ((bfd
*, const PTR
, Elf_Internal_Dyn
*));
1549 if (bfd_get_flavour (abfd
) != bfd_target_elf_flavour
1550 || bfd_get_format (abfd
) != bfd_object
)
1553 s
= bfd_get_section_by_name (abfd
, ".dynamic");
1554 if (s
== NULL
|| s
->_raw_size
== 0)
1557 dynbuf
= (bfd_byte
*) bfd_malloc (s
->_raw_size
);
1561 if (! bfd_get_section_contents (abfd
, s
, (PTR
) dynbuf
, (file_ptr
) 0,
1565 elfsec
= _bfd_elf_section_from_bfd_section (abfd
, s
);
1569 shlink
= elf_elfsections (abfd
)[elfsec
]->sh_link
;
1571 extdynsize
= get_elf_backend_data (abfd
)->s
->sizeof_dyn
;
1572 swap_dyn_in
= get_elf_backend_data (abfd
)->s
->swap_dyn_in
;
1575 extdynend
= extdyn
+ s
->_raw_size
;
1576 for (; extdyn
< extdynend
; extdyn
+= extdynsize
)
1578 Elf_Internal_Dyn dyn
;
1580 (*swap_dyn_in
) (abfd
, (PTR
) extdyn
, &dyn
);
1582 if (dyn
.d_tag
== DT_NULL
)
1585 if (dyn
.d_tag
== DT_NEEDED
)
1588 struct bfd_link_needed_list
*l
;
1589 unsigned int tagv
= dyn
.d_un
.d_val
;
1592 string
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
1597 l
= (struct bfd_link_needed_list
*) bfd_alloc (abfd
, amt
);
1618 /* Allocate an ELF string table--force the first byte to be zero. */
1620 struct bfd_strtab_hash
*
1621 _bfd_elf_stringtab_init ()
1623 struct bfd_strtab_hash
*ret
;
1625 ret
= _bfd_stringtab_init ();
1630 loc
= _bfd_stringtab_add (ret
, "", true, false);
1631 BFD_ASSERT (loc
== 0 || loc
== (bfd_size_type
) -1);
1632 if (loc
== (bfd_size_type
) -1)
1634 _bfd_stringtab_free (ret
);
1641 /* ELF .o/exec file reading */
1643 /* Create a new bfd section from an ELF section header. */
1646 bfd_section_from_shdr (abfd
, shindex
)
1648 unsigned int shindex
;
1650 Elf_Internal_Shdr
*hdr
= elf_elfsections (abfd
)[shindex
];
1651 Elf_Internal_Ehdr
*ehdr
= elf_elfheader (abfd
);
1652 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
1655 name
= elf_string_from_elf_strtab (abfd
, hdr
->sh_name
);
1657 switch (hdr
->sh_type
)
1660 /* Inactive section. Throw it away. */
1663 case SHT_PROGBITS
: /* Normal section with contents. */
1664 case SHT_DYNAMIC
: /* Dynamic linking information. */
1665 case SHT_NOBITS
: /* .bss section. */
1666 case SHT_HASH
: /* .hash section. */
1667 case SHT_NOTE
: /* .note section. */
1668 case SHT_INIT_ARRAY
: /* .init_array section. */
1669 case SHT_FINI_ARRAY
: /* .fini_array section. */
1670 case SHT_PREINIT_ARRAY
: /* .preinit_array section. */
1671 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1673 case SHT_SYMTAB
: /* A symbol table */
1674 if (elf_onesymtab (abfd
) == shindex
)
1677 BFD_ASSERT (hdr
->sh_entsize
== bed
->s
->sizeof_sym
);
1678 BFD_ASSERT (elf_onesymtab (abfd
) == 0);
1679 elf_onesymtab (abfd
) = shindex
;
1680 elf_tdata (abfd
)->symtab_hdr
= *hdr
;
1681 elf_elfsections (abfd
)[shindex
] = hdr
= &elf_tdata (abfd
)->symtab_hdr
;
1682 abfd
->flags
|= HAS_SYMS
;
1684 /* Sometimes a shared object will map in the symbol table. If
1685 SHF_ALLOC is set, and this is a shared object, then we also
1686 treat this section as a BFD section. We can not base the
1687 decision purely on SHF_ALLOC, because that flag is sometimes
1688 set in a relocateable object file, which would confuse the
1690 if ((hdr
->sh_flags
& SHF_ALLOC
) != 0
1691 && (abfd
->flags
& DYNAMIC
) != 0
1692 && ! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
))
1697 case SHT_DYNSYM
: /* A dynamic symbol table */
1698 if (elf_dynsymtab (abfd
) == shindex
)
1701 BFD_ASSERT (hdr
->sh_entsize
== bed
->s
->sizeof_sym
);
1702 BFD_ASSERT (elf_dynsymtab (abfd
) == 0);
1703 elf_dynsymtab (abfd
) = shindex
;
1704 elf_tdata (abfd
)->dynsymtab_hdr
= *hdr
;
1705 elf_elfsections (abfd
)[shindex
] = hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
1706 abfd
->flags
|= HAS_SYMS
;
1708 /* Besides being a symbol table, we also treat this as a regular
1709 section, so that objcopy can handle it. */
1710 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1712 case SHT_SYMTAB_SHNDX
: /* Symbol section indices when >64k sections */
1713 if (elf_symtab_shndx (abfd
) == shindex
)
1716 /* Get the associated symbol table. */
1717 if (! bfd_section_from_shdr (abfd
, hdr
->sh_link
)
1718 || hdr
->sh_link
!= elf_onesymtab (abfd
))
1721 elf_symtab_shndx (abfd
) = shindex
;
1722 elf_tdata (abfd
)->symtab_shndx_hdr
= *hdr
;
1723 elf_elfsections (abfd
)[shindex
] = &elf_tdata (abfd
)->symtab_shndx_hdr
;
1726 case SHT_STRTAB
: /* A string table */
1727 if (hdr
->bfd_section
!= NULL
)
1729 if (ehdr
->e_shstrndx
== shindex
)
1731 elf_tdata (abfd
)->shstrtab_hdr
= *hdr
;
1732 elf_elfsections (abfd
)[shindex
] = &elf_tdata (abfd
)->shstrtab_hdr
;
1736 unsigned int i
, num_sec
;
1738 num_sec
= elf_numsections (abfd
);
1739 for (i
= 1; i
< num_sec
; i
++)
1741 Elf_Internal_Shdr
*hdr2
= elf_elfsections (abfd
)[i
];
1742 if (hdr2
->sh_link
== shindex
)
1744 if (! bfd_section_from_shdr (abfd
, i
))
1746 if (elf_onesymtab (abfd
) == i
)
1748 elf_tdata (abfd
)->strtab_hdr
= *hdr
;
1749 elf_elfsections (abfd
)[shindex
] =
1750 &elf_tdata (abfd
)->strtab_hdr
;
1753 if (elf_dynsymtab (abfd
) == i
)
1755 elf_tdata (abfd
)->dynstrtab_hdr
= *hdr
;
1756 elf_elfsections (abfd
)[shindex
] = hdr
=
1757 &elf_tdata (abfd
)->dynstrtab_hdr
;
1758 /* We also treat this as a regular section, so
1759 that objcopy can handle it. */
1762 #if 0 /* Not handling other string tables specially right now. */
1763 hdr2
= elf_elfsections (abfd
)[i
]; /* in case it moved */
1764 /* We have a strtab for some random other section. */
1765 newsect
= (asection
*) hdr2
->bfd_section
;
1768 hdr
->bfd_section
= newsect
;
1769 hdr2
= &elf_section_data (newsect
)->str_hdr
;
1771 elf_elfsections (abfd
)[shindex
] = hdr2
;
1777 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1781 /* *These* do a lot of work -- but build no sections! */
1783 asection
*target_sect
;
1784 Elf_Internal_Shdr
*hdr2
;
1785 unsigned int num_sec
= elf_numsections (abfd
);
1787 /* Check for a bogus link to avoid crashing. */
1788 if ((hdr
->sh_link
>= SHN_LORESERVE
&& hdr
->sh_link
<= SHN_HIRESERVE
)
1789 || hdr
->sh_link
>= num_sec
)
1791 ((*_bfd_error_handler
)
1792 (_("%s: invalid link %lu for reloc section %s (index %u)"),
1793 bfd_archive_filename (abfd
), hdr
->sh_link
, name
, shindex
));
1794 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1797 /* For some incomprehensible reason Oracle distributes
1798 libraries for Solaris in which some of the objects have
1799 bogus sh_link fields. It would be nice if we could just
1800 reject them, but, unfortunately, some people need to use
1801 them. We scan through the section headers; if we find only
1802 one suitable symbol table, we clobber the sh_link to point
1803 to it. I hope this doesn't break anything. */
1804 if (elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_SYMTAB
1805 && elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_DYNSYM
)
1811 for (scan
= 1; scan
< num_sec
; scan
++)
1813 if (elf_elfsections (abfd
)[scan
]->sh_type
== SHT_SYMTAB
1814 || elf_elfsections (abfd
)[scan
]->sh_type
== SHT_DYNSYM
)
1825 hdr
->sh_link
= found
;
1828 /* Get the symbol table. */
1829 if (elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
== SHT_SYMTAB
1830 && ! bfd_section_from_shdr (abfd
, hdr
->sh_link
))
1833 /* If this reloc section does not use the main symbol table we
1834 don't treat it as a reloc section. BFD can't adequately
1835 represent such a section, so at least for now, we don't
1836 try. We just present it as a normal section. We also
1837 can't use it as a reloc section if it points to the null
1839 if (hdr
->sh_link
!= elf_onesymtab (abfd
) || hdr
->sh_info
== SHN_UNDEF
)
1840 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1842 if (! bfd_section_from_shdr (abfd
, hdr
->sh_info
))
1844 target_sect
= bfd_section_from_elf_index (abfd
, hdr
->sh_info
);
1845 if (target_sect
== NULL
)
1848 if ((target_sect
->flags
& SEC_RELOC
) == 0
1849 || target_sect
->reloc_count
== 0)
1850 hdr2
= &elf_section_data (target_sect
)->rel_hdr
;
1854 BFD_ASSERT (elf_section_data (target_sect
)->rel_hdr2
== NULL
);
1855 amt
= sizeof (*hdr2
);
1856 hdr2
= (Elf_Internal_Shdr
*) bfd_alloc (abfd
, amt
);
1857 elf_section_data (target_sect
)->rel_hdr2
= hdr2
;
1860 elf_elfsections (abfd
)[shindex
] = hdr2
;
1861 target_sect
->reloc_count
+= NUM_SHDR_ENTRIES (hdr
);
1862 target_sect
->flags
|= SEC_RELOC
;
1863 target_sect
->relocation
= NULL
;
1864 target_sect
->rel_filepos
= hdr
->sh_offset
;
1865 /* In the section to which the relocations apply, mark whether
1866 its relocations are of the REL or RELA variety. */
1867 if (hdr
->sh_size
!= 0)
1868 elf_section_data (target_sect
)->use_rela_p
1869 = (hdr
->sh_type
== SHT_RELA
);
1870 abfd
->flags
|= HAS_RELOC
;
1875 case SHT_GNU_verdef
:
1876 elf_dynverdef (abfd
) = shindex
;
1877 elf_tdata (abfd
)->dynverdef_hdr
= *hdr
;
1878 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1881 case SHT_GNU_versym
:
1882 elf_dynversym (abfd
) = shindex
;
1883 elf_tdata (abfd
)->dynversym_hdr
= *hdr
;
1884 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1887 case SHT_GNU_verneed
:
1888 elf_dynverref (abfd
) = shindex
;
1889 elf_tdata (abfd
)->dynverref_hdr
= *hdr
;
1890 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1897 /* We need a BFD section for objcopy and relocatable linking,
1898 and it's handy to have the signature available as the section
1900 name
= group_signature (abfd
, hdr
);
1903 if (!_bfd_elf_make_section_from_shdr (abfd
, hdr
, name
))
1905 if (hdr
->contents
!= NULL
)
1907 Elf_Internal_Group
*idx
= (Elf_Internal_Group
*) hdr
->contents
;
1908 unsigned int n_elt
= hdr
->sh_size
/ 4;
1911 if (idx
->flags
& GRP_COMDAT
)
1912 hdr
->bfd_section
->flags
1913 |= SEC_LINK_ONCE
| SEC_LINK_DUPLICATES_DISCARD
;
1915 while (--n_elt
!= 0)
1916 if ((s
= (++idx
)->shdr
->bfd_section
) != NULL
1917 && elf_next_in_group (s
) != NULL
)
1919 elf_next_in_group (hdr
->bfd_section
) = s
;
1926 /* Check for any processor-specific section types. */
1928 if (bed
->elf_backend_section_from_shdr
)
1929 (*bed
->elf_backend_section_from_shdr
) (abfd
, hdr
, name
);
1937 /* Return the section for the local symbol specified by ABFD, R_SYMNDX.
1938 Return SEC for sections that have no elf section, and NULL on error. */
1941 bfd_section_from_r_symndx (abfd
, cache
, sec
, r_symndx
)
1943 struct sym_sec_cache
*cache
;
1945 unsigned long r_symndx
;
1947 unsigned char esym_shndx
[4];
1948 unsigned int isym_shndx
;
1949 Elf_Internal_Shdr
*symtab_hdr
;
1952 unsigned int ent
= r_symndx
% LOCAL_SYM_CACHE_SIZE
;
1954 if (cache
->abfd
== abfd
&& cache
->indx
[ent
] == r_symndx
)
1955 return cache
->sec
[ent
];
1957 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
1958 pos
= symtab_hdr
->sh_offset
;
1959 if (get_elf_backend_data (abfd
)->s
->sizeof_sym
1960 == sizeof (Elf64_External_Sym
))
1962 pos
+= r_symndx
* sizeof (Elf64_External_Sym
);
1963 pos
+= offsetof (Elf64_External_Sym
, st_shndx
);
1964 amt
= sizeof (((Elf64_External_Sym
*) 0)->st_shndx
);
1968 pos
+= r_symndx
* sizeof (Elf32_External_Sym
);
1969 pos
+= offsetof (Elf32_External_Sym
, st_shndx
);
1970 amt
= sizeof (((Elf32_External_Sym
*) 0)->st_shndx
);
1972 if (bfd_seek (abfd
, pos
, SEEK_SET
) != 0
1973 || bfd_bread ((PTR
) esym_shndx
, amt
, abfd
) != amt
)
1975 isym_shndx
= H_GET_16 (abfd
, esym_shndx
);
1977 if (isym_shndx
== SHN_XINDEX
)
1979 Elf_Internal_Shdr
*shndx_hdr
= &elf_tdata (abfd
)->symtab_shndx_hdr
;
1980 if (shndx_hdr
->sh_size
!= 0)
1982 pos
= shndx_hdr
->sh_offset
;
1983 pos
+= r_symndx
* sizeof (Elf_External_Sym_Shndx
);
1984 amt
= sizeof (Elf_External_Sym_Shndx
);
1985 if (bfd_seek (abfd
, pos
, SEEK_SET
) != 0
1986 || bfd_bread ((PTR
) esym_shndx
, amt
, abfd
) != amt
)
1988 isym_shndx
= H_GET_32 (abfd
, esym_shndx
);
1992 if (cache
->abfd
!= abfd
)
1994 memset (cache
->indx
, -1, sizeof (cache
->indx
));
1997 cache
->indx
[ent
] = r_symndx
;
1998 cache
->sec
[ent
] = sec
;
1999 if (isym_shndx
< SHN_LORESERVE
|| isym_shndx
> SHN_HIRESERVE
)
2002 s
= bfd_section_from_elf_index (abfd
, isym_shndx
);
2004 cache
->sec
[ent
] = s
;
2006 return cache
->sec
[ent
];
2009 /* Given an ELF section number, retrieve the corresponding BFD
2013 bfd_section_from_elf_index (abfd
, index
)
2017 if (index
>= elf_numsections (abfd
))
2019 return elf_elfsections (abfd
)[index
]->bfd_section
;
2023 _bfd_elf_new_section_hook (abfd
, sec
)
2027 struct bfd_elf_section_data
*sdata
;
2028 bfd_size_type amt
= sizeof (*sdata
);
2030 sdata
= (struct bfd_elf_section_data
*) bfd_zalloc (abfd
, amt
);
2033 sec
->used_by_bfd
= (PTR
) sdata
;
2035 /* Indicate whether or not this section should use RELA relocations. */
2037 = get_elf_backend_data (abfd
)->default_use_rela_p
;
2042 /* Create a new bfd section from an ELF program header.
2044 Since program segments have no names, we generate a synthetic name
2045 of the form segment<NUM>, where NUM is generally the index in the
2046 program header table. For segments that are split (see below) we
2047 generate the names segment<NUM>a and segment<NUM>b.
2049 Note that some program segments may have a file size that is different than
2050 (less than) the memory size. All this means is that at execution the
2051 system must allocate the amount of memory specified by the memory size,
2052 but only initialize it with the first "file size" bytes read from the
2053 file. This would occur for example, with program segments consisting
2054 of combined data+bss.
2056 To handle the above situation, this routine generates TWO bfd sections
2057 for the single program segment. The first has the length specified by
2058 the file size of the segment, and the second has the length specified
2059 by the difference between the two sizes. In effect, the segment is split
2060 into it's initialized and uninitialized parts.
2065 _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, typename
)
2067 Elf_Internal_Phdr
*hdr
;
2069 const char *typename
;
2077 split
= ((hdr
->p_memsz
> 0)
2078 && (hdr
->p_filesz
> 0)
2079 && (hdr
->p_memsz
> hdr
->p_filesz
));
2080 sprintf (namebuf
, "%s%d%s", typename
, index
, split
? "a" : "");
2081 len
= strlen (namebuf
) + 1;
2082 name
= bfd_alloc (abfd
, (bfd_size_type
) len
);
2085 memcpy (name
, namebuf
, len
);
2086 newsect
= bfd_make_section (abfd
, name
);
2087 if (newsect
== NULL
)
2089 newsect
->vma
= hdr
->p_vaddr
;
2090 newsect
->lma
= hdr
->p_paddr
;
2091 newsect
->_raw_size
= hdr
->p_filesz
;
2092 newsect
->filepos
= hdr
->p_offset
;
2093 newsect
->flags
|= SEC_HAS_CONTENTS
;
2094 if (hdr
->p_type
== PT_LOAD
)
2096 newsect
->flags
|= SEC_ALLOC
;
2097 newsect
->flags
|= SEC_LOAD
;
2098 if (hdr
->p_flags
& PF_X
)
2100 /* FIXME: all we known is that it has execute PERMISSION,
2102 newsect
->flags
|= SEC_CODE
;
2105 if (!(hdr
->p_flags
& PF_W
))
2107 newsect
->flags
|= SEC_READONLY
;
2112 sprintf (namebuf
, "%s%db", typename
, index
);
2113 len
= strlen (namebuf
) + 1;
2114 name
= bfd_alloc (abfd
, (bfd_size_type
) len
);
2117 memcpy (name
, namebuf
, len
);
2118 newsect
= bfd_make_section (abfd
, name
);
2119 if (newsect
== NULL
)
2121 newsect
->vma
= hdr
->p_vaddr
+ hdr
->p_filesz
;
2122 newsect
->lma
= hdr
->p_paddr
+ hdr
->p_filesz
;
2123 newsect
->_raw_size
= hdr
->p_memsz
- hdr
->p_filesz
;
2124 if (hdr
->p_type
== PT_LOAD
)
2126 newsect
->flags
|= SEC_ALLOC
;
2127 if (hdr
->p_flags
& PF_X
)
2128 newsect
->flags
|= SEC_CODE
;
2130 if (!(hdr
->p_flags
& PF_W
))
2131 newsect
->flags
|= SEC_READONLY
;
2138 bfd_section_from_phdr (abfd
, hdr
, index
)
2140 Elf_Internal_Phdr
*hdr
;
2143 struct elf_backend_data
*bed
;
2145 switch (hdr
->p_type
)
2148 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "null");
2151 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "load");
2154 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "dynamic");
2157 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "interp");
2160 if (! _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "note"))
2162 if (! elfcore_read_notes (abfd
, (file_ptr
) hdr
->p_offset
, hdr
->p_filesz
))
2167 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "shlib");
2170 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "phdr");
2173 /* Check for any processor-specific program segment types.
2174 If no handler for them, default to making "segment" sections. */
2175 bed
= get_elf_backend_data (abfd
);
2176 if (bed
->elf_backend_section_from_phdr
)
2177 return (*bed
->elf_backend_section_from_phdr
) (abfd
, hdr
, index
);
2179 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "segment");
2183 /* Initialize REL_HDR, the section-header for new section, containing
2184 relocations against ASECT. If USE_RELA_P is true, we use RELA
2185 relocations; otherwise, we use REL relocations. */
2188 _bfd_elf_init_reloc_shdr (abfd
, rel_hdr
, asect
, use_rela_p
)
2190 Elf_Internal_Shdr
*rel_hdr
;
2195 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2196 bfd_size_type amt
= sizeof ".rela" + strlen (asect
->name
);
2198 name
= bfd_alloc (abfd
, amt
);
2201 sprintf (name
, "%s%s", use_rela_p
? ".rela" : ".rel", asect
->name
);
2203 (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd
), name
,
2205 if (rel_hdr
->sh_name
== (unsigned int) -1)
2207 rel_hdr
->sh_type
= use_rela_p
? SHT_RELA
: SHT_REL
;
2208 rel_hdr
->sh_entsize
= (use_rela_p
2209 ? bed
->s
->sizeof_rela
2210 : bed
->s
->sizeof_rel
);
2211 rel_hdr
->sh_addralign
= bed
->s
->file_align
;
2212 rel_hdr
->sh_flags
= 0;
2213 rel_hdr
->sh_addr
= 0;
2214 rel_hdr
->sh_size
= 0;
2215 rel_hdr
->sh_offset
= 0;
2220 /* Set up an ELF internal section header for a section. */
2223 elf_fake_sections (abfd
, asect
, failedptrarg
)
2228 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2229 boolean
*failedptr
= (boolean
*) failedptrarg
;
2230 Elf_Internal_Shdr
*this_hdr
;
2234 /* We already failed; just get out of the bfd_map_over_sections
2239 this_hdr
= &elf_section_data (asect
)->this_hdr
;
2241 this_hdr
->sh_name
= (unsigned long) _bfd_elf_strtab_add (elf_shstrtab (abfd
),
2242 asect
->name
, false);
2243 if (this_hdr
->sh_name
== (unsigned long) -1)
2249 this_hdr
->sh_flags
= 0;
2251 if ((asect
->flags
& SEC_ALLOC
) != 0
2252 || asect
->user_set_vma
)
2253 this_hdr
->sh_addr
= asect
->vma
;
2255 this_hdr
->sh_addr
= 0;
2257 this_hdr
->sh_offset
= 0;
2258 this_hdr
->sh_size
= asect
->_raw_size
;
2259 this_hdr
->sh_link
= 0;
2260 this_hdr
->sh_addralign
= 1 << asect
->alignment_power
;
2261 /* The sh_entsize and sh_info fields may have been set already by
2262 copy_private_section_data. */
2264 this_hdr
->bfd_section
= asect
;
2265 this_hdr
->contents
= NULL
;
2267 /* FIXME: This should not be based on section names. */
2268 if (strcmp (asect
->name
, ".dynstr") == 0)
2269 this_hdr
->sh_type
= SHT_STRTAB
;
2270 else if (strcmp (asect
->name
, ".hash") == 0)
2272 this_hdr
->sh_type
= SHT_HASH
;
2273 this_hdr
->sh_entsize
= bed
->s
->sizeof_hash_entry
;
2275 else if (strcmp (asect
->name
, ".dynsym") == 0)
2277 this_hdr
->sh_type
= SHT_DYNSYM
;
2278 this_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
2280 else if (strcmp (asect
->name
, ".dynamic") == 0)
2282 this_hdr
->sh_type
= SHT_DYNAMIC
;
2283 this_hdr
->sh_entsize
= bed
->s
->sizeof_dyn
;
2285 else if (strncmp (asect
->name
, ".rela", 5) == 0
2286 && get_elf_backend_data (abfd
)->may_use_rela_p
)
2288 this_hdr
->sh_type
= SHT_RELA
;
2289 this_hdr
->sh_entsize
= bed
->s
->sizeof_rela
;
2291 else if (strncmp (asect
->name
, ".rel", 4) == 0
2292 && get_elf_backend_data (abfd
)->may_use_rel_p
)
2294 this_hdr
->sh_type
= SHT_REL
;
2295 this_hdr
->sh_entsize
= bed
->s
->sizeof_rel
;
2297 else if (strcmp (asect
->name
, ".init_array") == 0)
2298 this_hdr
->sh_type
= SHT_INIT_ARRAY
;
2299 else if (strcmp (asect
->name
, ".fini_array") == 0)
2300 this_hdr
->sh_type
= SHT_FINI_ARRAY
;
2301 else if (strcmp (asect
->name
, ".preinit_array") == 0)
2302 this_hdr
->sh_type
= SHT_PREINIT_ARRAY
;
2303 else if (strncmp (asect
->name
, ".note", 5) == 0)
2304 this_hdr
->sh_type
= SHT_NOTE
;
2305 else if (strncmp (asect
->name
, ".stab", 5) == 0
2306 && strcmp (asect
->name
+ strlen (asect
->name
) - 3, "str") == 0)
2307 this_hdr
->sh_type
= SHT_STRTAB
;
2308 else if (strcmp (asect
->name
, ".gnu.version") == 0)
2310 this_hdr
->sh_type
= SHT_GNU_versym
;
2311 this_hdr
->sh_entsize
= sizeof (Elf_External_Versym
);
2313 else if (strcmp (asect
->name
, ".gnu.version_d") == 0)
2315 this_hdr
->sh_type
= SHT_GNU_verdef
;
2316 this_hdr
->sh_entsize
= 0;
2317 /* objcopy or strip will copy over sh_info, but may not set
2318 cverdefs. The linker will set cverdefs, but sh_info will be
2320 if (this_hdr
->sh_info
== 0)
2321 this_hdr
->sh_info
= elf_tdata (abfd
)->cverdefs
;
2323 BFD_ASSERT (elf_tdata (abfd
)->cverdefs
== 0
2324 || this_hdr
->sh_info
== elf_tdata (abfd
)->cverdefs
);
2326 else if (strcmp (asect
->name
, ".gnu.version_r") == 0)
2328 this_hdr
->sh_type
= SHT_GNU_verneed
;
2329 this_hdr
->sh_entsize
= 0;
2330 /* objcopy or strip will copy over sh_info, but may not set
2331 cverrefs. The linker will set cverrefs, but sh_info will be
2333 if (this_hdr
->sh_info
== 0)
2334 this_hdr
->sh_info
= elf_tdata (abfd
)->cverrefs
;
2336 BFD_ASSERT (elf_tdata (abfd
)->cverrefs
== 0
2337 || this_hdr
->sh_info
== elf_tdata (abfd
)->cverrefs
);
2339 else if ((asect
->flags
& SEC_GROUP
) != 0)
2341 this_hdr
->sh_type
= SHT_GROUP
;
2342 this_hdr
->sh_entsize
= 4;
2344 else if ((asect
->flags
& SEC_ALLOC
) != 0
2345 && (((asect
->flags
& (SEC_LOAD
| SEC_HAS_CONTENTS
)) == 0)
2346 || (asect
->flags
& SEC_NEVER_LOAD
) != 0))
2347 this_hdr
->sh_type
= SHT_NOBITS
;
2349 this_hdr
->sh_type
= SHT_PROGBITS
;
2351 if ((asect
->flags
& SEC_ALLOC
) != 0)
2352 this_hdr
->sh_flags
|= SHF_ALLOC
;
2353 if ((asect
->flags
& SEC_READONLY
) == 0)
2354 this_hdr
->sh_flags
|= SHF_WRITE
;
2355 if ((asect
->flags
& SEC_CODE
) != 0)
2356 this_hdr
->sh_flags
|= SHF_EXECINSTR
;
2357 if ((asect
->flags
& SEC_MERGE
) != 0)
2359 this_hdr
->sh_flags
|= SHF_MERGE
;
2360 this_hdr
->sh_entsize
= asect
->entsize
;
2361 if ((asect
->flags
& SEC_STRINGS
) != 0)
2362 this_hdr
->sh_flags
|= SHF_STRINGS
;
2364 if ((asect
->flags
& SEC_GROUP
) == 0 && elf_group_name (asect
) != NULL
)
2365 this_hdr
->sh_flags
|= SHF_GROUP
;
2366 if ((asect
->flags
& SEC_THREAD_LOCAL
) != 0)
2367 this_hdr
->sh_flags
|= SHF_TLS
;
2369 /* Check for processor-specific section types. */
2370 if (bed
->elf_backend_fake_sections
2371 && !(*bed
->elf_backend_fake_sections
) (abfd
, this_hdr
, asect
))
2374 /* If the section has relocs, set up a section header for the
2375 SHT_REL[A] section. If two relocation sections are required for
2376 this section, it is up to the processor-specific back-end to
2377 create the other. */
2378 if ((asect
->flags
& SEC_RELOC
) != 0
2379 && !_bfd_elf_init_reloc_shdr (abfd
,
2380 &elf_section_data (asect
)->rel_hdr
,
2382 elf_section_data (asect
)->use_rela_p
))
2386 /* Fill in the contents of a SHT_GROUP section. */
2389 bfd_elf_set_group_contents (abfd
, sec
, failedptrarg
)
2394 boolean
*failedptr
= (boolean
*) failedptrarg
;
2395 unsigned long symindx
;
2396 asection
*elt
, *first
;
2398 struct bfd_link_order
*l
;
2401 if (elf_section_data (sec
)->this_hdr
.sh_type
!= SHT_GROUP
2406 if (elf_group_id (sec
) != NULL
)
2407 symindx
= elf_group_id (sec
)->udata
.i
;
2411 /* If called from the assembler, swap_out_syms will have set up
2412 elf_section_syms; If called for "ld -r", use target_index. */
2413 if (elf_section_syms (abfd
) != NULL
)
2414 symindx
= elf_section_syms (abfd
)[sec
->index
]->udata
.i
;
2416 symindx
= sec
->target_index
;
2418 elf_section_data (sec
)->this_hdr
.sh_info
= symindx
;
2420 /* The contents won't be allocated for "ld -r" or objcopy. */
2422 if (sec
->contents
== NULL
)
2425 sec
->contents
= bfd_alloc (abfd
, sec
->_raw_size
);
2427 /* Arrange for the section to be written out. */
2428 elf_section_data (sec
)->this_hdr
.contents
= sec
->contents
;
2429 if (sec
->contents
== NULL
)
2436 loc
= sec
->contents
+ sec
->_raw_size
;
2438 /* Get the pointer to the first section in the group that gas
2439 squirreled away here. objcopy arranges for this to be set to the
2440 start of the input section group. */
2441 first
= elt
= elf_next_in_group (sec
);
2443 /* First element is a flag word. Rest of section is elf section
2444 indices for all the sections of the group. Write them backwards
2445 just to keep the group in the same order as given in .section
2446 directives, not that it matters. */
2455 s
= s
->output_section
;
2458 idx
= elf_section_data (s
)->this_idx
;
2459 H_PUT_32 (abfd
, idx
, loc
);
2460 elt
= elf_next_in_group (elt
);
2465 /* If this is a relocatable link, then the above did nothing because
2466 SEC is the output section. Look through the input sections
2468 for (l
= sec
->link_order_head
; l
!= NULL
; l
= l
->next
)
2469 if (l
->type
== bfd_indirect_link_order
2470 && (elt
= elf_next_in_group (l
->u
.indirect
.section
)) != NULL
)
2475 elf_section_data (elt
->output_section
)->this_idx
, loc
);
2476 elt
= elf_next_in_group (elt
);
2477 /* During a relocatable link, the lists are circular. */
2479 while (elt
!= elf_next_in_group (l
->u
.indirect
.section
));
2481 /* With ld -r, merging SHT_GROUP sections results in wasted space
2482 due to allowing for the flag word on each input. We may well
2483 duplicate entries too. */
2484 while ((loc
-= 4) > sec
->contents
)
2485 H_PUT_32 (abfd
, 0, loc
);
2487 if (loc
!= sec
->contents
)
2490 H_PUT_32 (abfd
, sec
->flags
& SEC_LINK_ONCE
? GRP_COMDAT
: 0, loc
);
2493 /* Assign all ELF section numbers. The dummy first section is handled here
2494 too. The link/info pointers for the standard section types are filled
2495 in here too, while we're at it. */
2498 assign_section_numbers (abfd
)
2501 struct elf_obj_tdata
*t
= elf_tdata (abfd
);
2503 unsigned int section_number
, secn
;
2504 Elf_Internal_Shdr
**i_shdrp
;
2509 _bfd_elf_strtab_clear_all_refs (elf_shstrtab (abfd
));
2511 for (sec
= abfd
->sections
; sec
; sec
= sec
->next
)
2513 struct bfd_elf_section_data
*d
= elf_section_data (sec
);
2515 if (section_number
== SHN_LORESERVE
)
2516 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2517 d
->this_idx
= section_number
++;
2518 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->this_hdr
.sh_name
);
2519 if ((sec
->flags
& SEC_RELOC
) == 0)
2523 if (section_number
== SHN_LORESERVE
)
2524 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2525 d
->rel_idx
= section_number
++;
2526 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->rel_hdr
.sh_name
);
2531 if (section_number
== SHN_LORESERVE
)
2532 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2533 d
->rel_idx2
= section_number
++;
2534 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->rel_hdr2
->sh_name
);
2540 if (section_number
== SHN_LORESERVE
)
2541 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2542 t
->shstrtab_section
= section_number
++;
2543 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->shstrtab_hdr
.sh_name
);
2544 elf_elfheader (abfd
)->e_shstrndx
= t
->shstrtab_section
;
2546 if (bfd_get_symcount (abfd
) > 0)
2548 if (section_number
== SHN_LORESERVE
)
2549 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2550 t
->symtab_section
= section_number
++;
2551 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->symtab_hdr
.sh_name
);
2552 if (section_number
> SHN_LORESERVE
- 2)
2554 if (section_number
== SHN_LORESERVE
)
2555 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2556 t
->symtab_shndx_section
= section_number
++;
2557 t
->symtab_shndx_hdr
.sh_name
2558 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd
),
2559 ".symtab_shndx", false);
2560 if (t
->symtab_shndx_hdr
.sh_name
== (unsigned int) -1)
2563 if (section_number
== SHN_LORESERVE
)
2564 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2565 t
->strtab_section
= section_number
++;
2566 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->strtab_hdr
.sh_name
);
2569 _bfd_elf_strtab_finalize (elf_shstrtab (abfd
));
2570 t
->shstrtab_hdr
.sh_size
= _bfd_elf_strtab_size (elf_shstrtab (abfd
));
2572 elf_numsections (abfd
) = section_number
;
2573 elf_elfheader (abfd
)->e_shnum
= section_number
;
2574 if (section_number
> SHN_LORESERVE
)
2575 elf_elfheader (abfd
)->e_shnum
-= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2577 /* Set up the list of section header pointers, in agreement with the
2579 amt
= section_number
* sizeof (Elf_Internal_Shdr
*);
2580 i_shdrp
= (Elf_Internal_Shdr
**) bfd_alloc (abfd
, amt
);
2581 if (i_shdrp
== NULL
)
2584 amt
= sizeof (Elf_Internal_Shdr
);
2585 i_shdrp
[0] = (Elf_Internal_Shdr
*) bfd_alloc (abfd
, amt
);
2586 if (i_shdrp
[0] == NULL
)
2588 bfd_release (abfd
, i_shdrp
);
2591 memset (i_shdrp
[0], 0, sizeof (Elf_Internal_Shdr
));
2593 elf_elfsections (abfd
) = i_shdrp
;
2595 i_shdrp
[t
->shstrtab_section
] = &t
->shstrtab_hdr
;
2596 if (bfd_get_symcount (abfd
) > 0)
2598 i_shdrp
[t
->symtab_section
] = &t
->symtab_hdr
;
2599 if (elf_numsections (abfd
) > SHN_LORESERVE
)
2601 i_shdrp
[t
->symtab_shndx_section
] = &t
->symtab_shndx_hdr
;
2602 t
->symtab_shndx_hdr
.sh_link
= t
->symtab_section
;
2604 i_shdrp
[t
->strtab_section
] = &t
->strtab_hdr
;
2605 t
->symtab_hdr
.sh_link
= t
->strtab_section
;
2607 for (sec
= abfd
->sections
; sec
; sec
= sec
->next
)
2609 struct bfd_elf_section_data
*d
= elf_section_data (sec
);
2613 i_shdrp
[d
->this_idx
] = &d
->this_hdr
;
2614 if (d
->rel_idx
!= 0)
2615 i_shdrp
[d
->rel_idx
] = &d
->rel_hdr
;
2616 if (d
->rel_idx2
!= 0)
2617 i_shdrp
[d
->rel_idx2
] = d
->rel_hdr2
;
2619 /* Fill in the sh_link and sh_info fields while we're at it. */
2621 /* sh_link of a reloc section is the section index of the symbol
2622 table. sh_info is the section index of the section to which
2623 the relocation entries apply. */
2624 if (d
->rel_idx
!= 0)
2626 d
->rel_hdr
.sh_link
= t
->symtab_section
;
2627 d
->rel_hdr
.sh_info
= d
->this_idx
;
2629 if (d
->rel_idx2
!= 0)
2631 d
->rel_hdr2
->sh_link
= t
->symtab_section
;
2632 d
->rel_hdr2
->sh_info
= d
->this_idx
;
2635 switch (d
->this_hdr
.sh_type
)
2639 /* A reloc section which we are treating as a normal BFD
2640 section. sh_link is the section index of the symbol
2641 table. sh_info is the section index of the section to
2642 which the relocation entries apply. We assume that an
2643 allocated reloc section uses the dynamic symbol table.
2644 FIXME: How can we be sure? */
2645 s
= bfd_get_section_by_name (abfd
, ".dynsym");
2647 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
2649 /* We look up the section the relocs apply to by name. */
2651 if (d
->this_hdr
.sh_type
== SHT_REL
)
2655 s
= bfd_get_section_by_name (abfd
, name
);
2657 d
->this_hdr
.sh_info
= elf_section_data (s
)->this_idx
;
2661 /* We assume that a section named .stab*str is a stabs
2662 string section. We look for a section with the same name
2663 but without the trailing ``str'', and set its sh_link
2664 field to point to this section. */
2665 if (strncmp (sec
->name
, ".stab", sizeof ".stab" - 1) == 0
2666 && strcmp (sec
->name
+ strlen (sec
->name
) - 3, "str") == 0)
2671 len
= strlen (sec
->name
);
2672 alc
= (char *) bfd_malloc ((bfd_size_type
) (len
- 2));
2675 memcpy (alc
, sec
->name
, len
- 3);
2676 alc
[len
- 3] = '\0';
2677 s
= bfd_get_section_by_name (abfd
, alc
);
2681 elf_section_data (s
)->this_hdr
.sh_link
= d
->this_idx
;
2683 /* This is a .stab section. */
2684 elf_section_data (s
)->this_hdr
.sh_entsize
=
2685 4 + 2 * bfd_get_arch_size (abfd
) / 8;
2692 case SHT_GNU_verneed
:
2693 case SHT_GNU_verdef
:
2694 /* sh_link is the section header index of the string table
2695 used for the dynamic entries, or the symbol table, or the
2697 s
= bfd_get_section_by_name (abfd
, ".dynstr");
2699 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
2703 case SHT_GNU_versym
:
2704 /* sh_link is the section header index of the symbol table
2705 this hash table or version table is for. */
2706 s
= bfd_get_section_by_name (abfd
, ".dynsym");
2708 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
2712 d
->this_hdr
.sh_link
= t
->symtab_section
;
2716 for (secn
= 1; secn
< section_number
; ++secn
)
2717 if (i_shdrp
[secn
] == NULL
)
2718 i_shdrp
[secn
] = i_shdrp
[0];
2720 i_shdrp
[secn
]->sh_name
= _bfd_elf_strtab_offset (elf_shstrtab (abfd
),
2721 i_shdrp
[secn
]->sh_name
);
2725 /* Map symbol from it's internal number to the external number, moving
2726 all local symbols to be at the head of the list. */
2729 sym_is_global (abfd
, sym
)
2733 /* If the backend has a special mapping, use it. */
2734 if (get_elf_backend_data (abfd
)->elf_backend_sym_is_global
)
2735 return ((*get_elf_backend_data (abfd
)->elf_backend_sym_is_global
)
2738 return ((sym
->flags
& (BSF_GLOBAL
| BSF_WEAK
)) != 0
2739 || bfd_is_und_section (bfd_get_section (sym
))
2740 || bfd_is_com_section (bfd_get_section (sym
)));
2744 elf_map_symbols (abfd
)
2747 unsigned int symcount
= bfd_get_symcount (abfd
);
2748 asymbol
**syms
= bfd_get_outsymbols (abfd
);
2749 asymbol
**sect_syms
;
2750 unsigned int num_locals
= 0;
2751 unsigned int num_globals
= 0;
2752 unsigned int num_locals2
= 0;
2753 unsigned int num_globals2
= 0;
2761 fprintf (stderr
, "elf_map_symbols\n");
2765 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
2767 if (max_index
< asect
->index
)
2768 max_index
= asect
->index
;
2772 amt
= max_index
* sizeof (asymbol
*);
2773 sect_syms
= (asymbol
**) bfd_zalloc (abfd
, amt
);
2774 if (sect_syms
== NULL
)
2776 elf_section_syms (abfd
) = sect_syms
;
2777 elf_num_section_syms (abfd
) = max_index
;
2779 /* Init sect_syms entries for any section symbols we have already
2780 decided to output. */
2781 for (idx
= 0; idx
< symcount
; idx
++)
2783 asymbol
*sym
= syms
[idx
];
2785 if ((sym
->flags
& BSF_SECTION_SYM
) != 0
2792 if (sec
->owner
!= NULL
)
2794 if (sec
->owner
!= abfd
)
2796 if (sec
->output_offset
!= 0)
2799 sec
= sec
->output_section
;
2801 /* Empty sections in the input files may have had a
2802 section symbol created for them. (See the comment
2803 near the end of _bfd_generic_link_output_symbols in
2804 linker.c). If the linker script discards such
2805 sections then we will reach this point. Since we know
2806 that we cannot avoid this case, we detect it and skip
2807 the abort and the assignment to the sect_syms array.
2808 To reproduce this particular case try running the
2809 linker testsuite test ld-scripts/weak.exp for an ELF
2810 port that uses the generic linker. */
2811 if (sec
->owner
== NULL
)
2814 BFD_ASSERT (sec
->owner
== abfd
);
2816 sect_syms
[sec
->index
] = syms
[idx
];
2821 /* Classify all of the symbols. */
2822 for (idx
= 0; idx
< symcount
; idx
++)
2824 if (!sym_is_global (abfd
, syms
[idx
]))
2830 /* We will be adding a section symbol for each BFD section. Most normal
2831 sections will already have a section symbol in outsymbols, but
2832 eg. SHT_GROUP sections will not, and we need the section symbol mapped
2833 at least in that case. */
2834 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
2836 if (sect_syms
[asect
->index
] == NULL
)
2838 if (!sym_is_global (abfd
, asect
->symbol
))
2845 /* Now sort the symbols so the local symbols are first. */
2846 amt
= (num_locals
+ num_globals
) * sizeof (asymbol
*);
2847 new_syms
= (asymbol
**) bfd_alloc (abfd
, amt
);
2849 if (new_syms
== NULL
)
2852 for (idx
= 0; idx
< symcount
; idx
++)
2854 asymbol
*sym
= syms
[idx
];
2857 if (!sym_is_global (abfd
, sym
))
2860 i
= num_locals
+ num_globals2
++;
2862 sym
->udata
.i
= i
+ 1;
2864 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
2866 if (sect_syms
[asect
->index
] == NULL
)
2868 asymbol
*sym
= asect
->symbol
;
2871 sect_syms
[asect
->index
] = sym
;
2872 if (!sym_is_global (abfd
, sym
))
2875 i
= num_locals
+ num_globals2
++;
2877 sym
->udata
.i
= i
+ 1;
2881 bfd_set_symtab (abfd
, new_syms
, num_locals
+ num_globals
);
2883 elf_num_locals (abfd
) = num_locals
;
2884 elf_num_globals (abfd
) = num_globals
;
2888 /* Align to the maximum file alignment that could be required for any
2889 ELF data structure. */
2891 static INLINE file_ptr align_file_position
PARAMS ((file_ptr
, int));
2892 static INLINE file_ptr
2893 align_file_position (off
, align
)
2897 return (off
+ align
- 1) & ~(align
- 1);
2900 /* Assign a file position to a section, optionally aligning to the
2901 required section alignment. */
2904 _bfd_elf_assign_file_position_for_section (i_shdrp
, offset
, align
)
2905 Elf_Internal_Shdr
*i_shdrp
;
2913 al
= i_shdrp
->sh_addralign
;
2915 offset
= BFD_ALIGN (offset
, al
);
2917 i_shdrp
->sh_offset
= offset
;
2918 if (i_shdrp
->bfd_section
!= NULL
)
2919 i_shdrp
->bfd_section
->filepos
= offset
;
2920 if (i_shdrp
->sh_type
!= SHT_NOBITS
)
2921 offset
+= i_shdrp
->sh_size
;
2925 /* Compute the file positions we are going to put the sections at, and
2926 otherwise prepare to begin writing out the ELF file. If LINK_INFO
2927 is not NULL, this is being called by the ELF backend linker. */
2930 _bfd_elf_compute_section_file_positions (abfd
, link_info
)
2932 struct bfd_link_info
*link_info
;
2934 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2936 struct bfd_strtab_hash
*strtab
;
2937 Elf_Internal_Shdr
*shstrtab_hdr
;
2939 if (abfd
->output_has_begun
)
2942 /* Do any elf backend specific processing first. */
2943 if (bed
->elf_backend_begin_write_processing
)
2944 (*bed
->elf_backend_begin_write_processing
) (abfd
, link_info
);
2946 if (! prep_headers (abfd
))
2949 /* Post process the headers if necessary. */
2950 if (bed
->elf_backend_post_process_headers
)
2951 (*bed
->elf_backend_post_process_headers
) (abfd
, link_info
);
2954 bfd_map_over_sections (abfd
, elf_fake_sections
, &failed
);
2958 if (!assign_section_numbers (abfd
))
2961 /* The backend linker builds symbol table information itself. */
2962 if (link_info
== NULL
&& bfd_get_symcount (abfd
) > 0)
2964 /* Non-zero if doing a relocatable link. */
2965 int relocatable_p
= ! (abfd
->flags
& (EXEC_P
| DYNAMIC
));
2967 if (! swap_out_syms (abfd
, &strtab
, relocatable_p
))
2971 if (link_info
== NULL
)
2973 bfd_map_over_sections (abfd
, bfd_elf_set_group_contents
, &failed
);
2978 shstrtab_hdr
= &elf_tdata (abfd
)->shstrtab_hdr
;
2979 /* sh_name was set in prep_headers. */
2980 shstrtab_hdr
->sh_type
= SHT_STRTAB
;
2981 shstrtab_hdr
->sh_flags
= 0;
2982 shstrtab_hdr
->sh_addr
= 0;
2983 shstrtab_hdr
->sh_size
= _bfd_elf_strtab_size (elf_shstrtab (abfd
));
2984 shstrtab_hdr
->sh_entsize
= 0;
2985 shstrtab_hdr
->sh_link
= 0;
2986 shstrtab_hdr
->sh_info
= 0;
2987 /* sh_offset is set in assign_file_positions_except_relocs. */
2988 shstrtab_hdr
->sh_addralign
= 1;
2990 if (!assign_file_positions_except_relocs (abfd
))
2993 if (link_info
== NULL
&& bfd_get_symcount (abfd
) > 0)
2996 Elf_Internal_Shdr
*hdr
;
2998 off
= elf_tdata (abfd
)->next_file_pos
;
3000 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
3001 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, true);
3003 hdr
= &elf_tdata (abfd
)->symtab_shndx_hdr
;
3004 if (hdr
->sh_size
!= 0)
3005 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, true);
3007 hdr
= &elf_tdata (abfd
)->strtab_hdr
;
3008 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, true);
3010 elf_tdata (abfd
)->next_file_pos
= off
;
3012 /* Now that we know where the .strtab section goes, write it
3014 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
3015 || ! _bfd_stringtab_emit (abfd
, strtab
))
3017 _bfd_stringtab_free (strtab
);
3020 abfd
->output_has_begun
= true;
3025 /* Create a mapping from a set of sections to a program segment. */
3027 static INLINE
struct elf_segment_map
*
3028 make_mapping (abfd
, sections
, from
, to
, phdr
)
3030 asection
**sections
;
3035 struct elf_segment_map
*m
;
3040 amt
= sizeof (struct elf_segment_map
);
3041 amt
+= (to
- from
- 1) * sizeof (asection
*);
3042 m
= (struct elf_segment_map
*) bfd_zalloc (abfd
, amt
);
3046 m
->p_type
= PT_LOAD
;
3047 for (i
= from
, hdrpp
= sections
+ from
; i
< to
; i
++, hdrpp
++)
3048 m
->sections
[i
- from
] = *hdrpp
;
3049 m
->count
= to
- from
;
3051 if (from
== 0 && phdr
)
3053 /* Include the headers in the first PT_LOAD segment. */
3054 m
->includes_filehdr
= 1;
3055 m
->includes_phdrs
= 1;
3061 /* Set up a mapping from BFD sections to program segments. */
3064 map_sections_to_segments (abfd
)
3067 asection
**sections
= NULL
;
3071 struct elf_segment_map
*mfirst
;
3072 struct elf_segment_map
**pm
;
3073 struct elf_segment_map
*m
;
3075 unsigned int phdr_index
;
3076 bfd_vma maxpagesize
;
3078 boolean phdr_in_segment
= true;
3081 asection
*first_tls
= NULL
;
3082 asection
*dynsec
, *eh_frame_hdr
;
3085 if (elf_tdata (abfd
)->segment_map
!= NULL
)
3088 if (bfd_count_sections (abfd
) == 0)
3091 /* Select the allocated sections, and sort them. */
3093 amt
= bfd_count_sections (abfd
) * sizeof (asection
*);
3094 sections
= (asection
**) bfd_malloc (amt
);
3095 if (sections
== NULL
)
3099 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
3101 if ((s
->flags
& SEC_ALLOC
) != 0)
3107 BFD_ASSERT (i
<= bfd_count_sections (abfd
));
3110 qsort (sections
, (size_t) count
, sizeof (asection
*), elf_sort_sections
);
3112 /* Build the mapping. */
3117 /* If we have a .interp section, then create a PT_PHDR segment for
3118 the program headers and a PT_INTERP segment for the .interp
3120 s
= bfd_get_section_by_name (abfd
, ".interp");
3121 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0)
3123 amt
= sizeof (struct elf_segment_map
);
3124 m
= (struct elf_segment_map
*) bfd_zalloc (abfd
, amt
);
3128 m
->p_type
= PT_PHDR
;
3129 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
3130 m
->p_flags
= PF_R
| PF_X
;
3131 m
->p_flags_valid
= 1;
3132 m
->includes_phdrs
= 1;
3137 amt
= sizeof (struct elf_segment_map
);
3138 m
= (struct elf_segment_map
*) bfd_zalloc (abfd
, amt
);
3142 m
->p_type
= PT_INTERP
;
3150 /* Look through the sections. We put sections in the same program
3151 segment when the start of the second section can be placed within
3152 a few bytes of the end of the first section. */
3155 maxpagesize
= get_elf_backend_data (abfd
)->maxpagesize
;
3157 dynsec
= bfd_get_section_by_name (abfd
, ".dynamic");
3159 && (dynsec
->flags
& SEC_LOAD
) == 0)
3162 /* Deal with -Ttext or something similar such that the first section
3163 is not adjacent to the program headers. This is an
3164 approximation, since at this point we don't know exactly how many
3165 program headers we will need. */
3168 bfd_size_type phdr_size
;
3170 phdr_size
= elf_tdata (abfd
)->program_header_size
;
3172 phdr_size
= get_elf_backend_data (abfd
)->s
->sizeof_phdr
;
3173 if ((abfd
->flags
& D_PAGED
) == 0
3174 || sections
[0]->lma
< phdr_size
3175 || sections
[0]->lma
% maxpagesize
< phdr_size
% maxpagesize
)
3176 phdr_in_segment
= false;
3179 for (i
= 0, hdrpp
= sections
; i
< count
; i
++, hdrpp
++)
3182 boolean new_segment
;
3186 /* See if this section and the last one will fit in the same
3189 if (last_hdr
== NULL
)
3191 /* If we don't have a segment yet, then we don't need a new
3192 one (we build the last one after this loop). */
3193 new_segment
= false;
3195 else if (last_hdr
->lma
- last_hdr
->vma
!= hdr
->lma
- hdr
->vma
)
3197 /* If this section has a different relation between the
3198 virtual address and the load address, then we need a new
3202 else if (BFD_ALIGN (last_hdr
->lma
+ last_hdr
->_raw_size
, maxpagesize
)
3203 < BFD_ALIGN (hdr
->lma
, maxpagesize
))
3205 /* If putting this section in this segment would force us to
3206 skip a page in the segment, then we need a new segment. */
3209 else if ((last_hdr
->flags
& SEC_LOAD
) == 0
3210 && (hdr
->flags
& SEC_LOAD
) != 0)
3212 /* We don't want to put a loadable section after a
3213 nonloadable section in the same segment. */
3216 else if ((abfd
->flags
& D_PAGED
) == 0)
3218 /* If the file is not demand paged, which means that we
3219 don't require the sections to be correctly aligned in the
3220 file, then there is no other reason for a new segment. */
3221 new_segment
= false;
3224 && (hdr
->flags
& SEC_READONLY
) == 0
3225 && (BFD_ALIGN (last_hdr
->lma
+ last_hdr
->_raw_size
, maxpagesize
)
3228 /* We don't want to put a writable section in a read only
3229 segment, unless they are on the same page in memory
3230 anyhow. We already know that the last section does not
3231 bring us past the current section on the page, so the
3232 only case in which the new section is not on the same
3233 page as the previous section is when the previous section
3234 ends precisely on a page boundary. */
3239 /* Otherwise, we can use the same segment. */
3240 new_segment
= false;
3245 if ((hdr
->flags
& SEC_READONLY
) == 0)
3251 /* We need a new program segment. We must create a new program
3252 header holding all the sections from phdr_index until hdr. */
3254 m
= make_mapping (abfd
, sections
, phdr_index
, i
, phdr_in_segment
);
3261 if ((hdr
->flags
& SEC_READONLY
) == 0)
3268 phdr_in_segment
= false;
3271 /* Create a final PT_LOAD program segment. */
3272 if (last_hdr
!= NULL
)
3274 m
= make_mapping (abfd
, sections
, phdr_index
, i
, phdr_in_segment
);
3282 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
3285 amt
= sizeof (struct elf_segment_map
);
3286 m
= (struct elf_segment_map
*) bfd_zalloc (abfd
, amt
);
3290 m
->p_type
= PT_DYNAMIC
;
3292 m
->sections
[0] = dynsec
;
3298 /* For each loadable .note section, add a PT_NOTE segment. We don't
3299 use bfd_get_section_by_name, because if we link together
3300 nonloadable .note sections and loadable .note sections, we will
3301 generate two .note sections in the output file. FIXME: Using
3302 names for section types is bogus anyhow. */
3303 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
3305 if ((s
->flags
& SEC_LOAD
) != 0
3306 && strncmp (s
->name
, ".note", 5) == 0)
3308 amt
= sizeof (struct elf_segment_map
);
3309 m
= (struct elf_segment_map
*) bfd_zalloc (abfd
, amt
);
3313 m
->p_type
= PT_NOTE
;
3320 if (s
->flags
& SEC_THREAD_LOCAL
)
3328 /* If there are any SHF_TLS output sections, add PT_TLS segment. */
3333 amt
= sizeof (struct elf_segment_map
);
3334 amt
+= (tls_count
- 1) * sizeof (asection
*);
3335 m
= (struct elf_segment_map
*) bfd_zalloc (abfd
, amt
);
3340 m
->count
= tls_count
;
3341 /* Mandated PF_R. */
3343 m
->p_flags_valid
= 1;
3344 for (i
= 0; i
< tls_count
; ++i
)
3346 BFD_ASSERT (first_tls
->flags
& SEC_THREAD_LOCAL
);
3347 m
->sections
[i
] = first_tls
;
3348 first_tls
= first_tls
->next
;
3355 /* If there is a .eh_frame_hdr section, throw in a PT_GNU_EH_FRAME
3357 eh_frame_hdr
= NULL
;
3358 if (elf_tdata (abfd
)->eh_frame_hdr
)
3359 eh_frame_hdr
= bfd_get_section_by_name (abfd
, ".eh_frame_hdr");
3360 if (eh_frame_hdr
!= NULL
&& (eh_frame_hdr
->flags
& SEC_LOAD
))
3362 amt
= sizeof (struct elf_segment_map
);
3363 m
= (struct elf_segment_map
*) bfd_zalloc (abfd
, amt
);
3367 m
->p_type
= PT_GNU_EH_FRAME
;
3369 m
->sections
[0] = eh_frame_hdr
;
3378 elf_tdata (abfd
)->segment_map
= mfirst
;
3382 if (sections
!= NULL
)
3387 /* Sort sections by address. */
3390 elf_sort_sections (arg1
, arg2
)
3394 const asection
*sec1
= *(const asection
**) arg1
;
3395 const asection
*sec2
= *(const asection
**) arg2
;
3397 /* Sort by LMA first, since this is the address used to
3398 place the section into a segment. */
3399 if (sec1
->lma
< sec2
->lma
)
3401 else if (sec1
->lma
> sec2
->lma
)
3404 /* Then sort by VMA. Normally the LMA and the VMA will be
3405 the same, and this will do nothing. */
3406 if (sec1
->vma
< sec2
->vma
)
3408 else if (sec1
->vma
> sec2
->vma
)
3411 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
3413 #define TOEND(x) (((x)->flags & SEC_LOAD) == 0)
3419 /* If the indicies are the same, do not return 0
3420 here, but continue to try the next comparison. */
3421 if (sec1
->target_index
- sec2
->target_index
!= 0)
3422 return sec1
->target_index
- sec2
->target_index
;
3427 else if (TOEND (sec2
))
3432 /* Sort by size, to put zero sized sections
3433 before others at the same address. */
3435 if (sec1
->_raw_size
< sec2
->_raw_size
)
3437 if (sec1
->_raw_size
> sec2
->_raw_size
)
3440 return sec1
->target_index
- sec2
->target_index
;
3443 /* Assign file positions to the sections based on the mapping from
3444 sections to segments. This function also sets up some fields in
3445 the file header, and writes out the program headers. */
3448 assign_file_positions_for_segments (abfd
)
3451 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3453 struct elf_segment_map
*m
;
3455 Elf_Internal_Phdr
*phdrs
;
3457 bfd_vma filehdr_vaddr
, filehdr_paddr
;
3458 bfd_vma phdrs_vaddr
, phdrs_paddr
;
3459 Elf_Internal_Phdr
*p
;
3462 if (elf_tdata (abfd
)->segment_map
== NULL
)
3464 if (! map_sections_to_segments (abfd
))
3469 /* The placement algorithm assumes that non allocated sections are
3470 not in PT_LOAD segments. We ensure this here by removing such
3471 sections from the segment map. */
3472 for (m
= elf_tdata (abfd
)->segment_map
;
3476 unsigned int new_count
;
3479 if (m
->p_type
!= PT_LOAD
)
3483 for (i
= 0; i
< m
->count
; i
++)
3485 if ((m
->sections
[i
]->flags
& SEC_ALLOC
) != 0)
3488 m
->sections
[new_count
] = m
->sections
[i
];
3494 if (new_count
!= m
->count
)
3495 m
->count
= new_count
;
3499 if (bed
->elf_backend_modify_segment_map
)
3501 if (! (*bed
->elf_backend_modify_segment_map
) (abfd
))
3506 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
3509 elf_elfheader (abfd
)->e_phoff
= bed
->s
->sizeof_ehdr
;
3510 elf_elfheader (abfd
)->e_phentsize
= bed
->s
->sizeof_phdr
;
3511 elf_elfheader (abfd
)->e_phnum
= count
;
3516 /* If we already counted the number of program segments, make sure
3517 that we allocated enough space. This happens when SIZEOF_HEADERS
3518 is used in a linker script. */
3519 alloc
= elf_tdata (abfd
)->program_header_size
/ bed
->s
->sizeof_phdr
;
3520 if (alloc
!= 0 && count
> alloc
)
3522 ((*_bfd_error_handler
)
3523 (_("%s: Not enough room for program headers (allocated %u, need %u)"),
3524 bfd_get_filename (abfd
), alloc
, count
));
3525 bfd_set_error (bfd_error_bad_value
);
3532 amt
= alloc
* sizeof (Elf_Internal_Phdr
);
3533 phdrs
= (Elf_Internal_Phdr
*) bfd_alloc (abfd
, amt
);
3537 off
= bed
->s
->sizeof_ehdr
;
3538 off
+= alloc
* bed
->s
->sizeof_phdr
;
3545 for (m
= elf_tdata (abfd
)->segment_map
, p
= phdrs
;
3552 /* If elf_segment_map is not from map_sections_to_segments, the
3553 sections may not be correctly ordered. NOTE: sorting should
3554 not be done to the PT_NOTE section of a corefile, which may
3555 contain several pseudo-sections artificially created by bfd.
3556 Sorting these pseudo-sections breaks things badly. */
3558 && !(elf_elfheader (abfd
)->e_type
== ET_CORE
3559 && m
->p_type
== PT_NOTE
))
3560 qsort (m
->sections
, (size_t) m
->count
, sizeof (asection
*),
3563 p
->p_type
= m
->p_type
;
3564 p
->p_flags
= m
->p_flags
;
3566 if (p
->p_type
== PT_LOAD
3568 && (m
->sections
[0]->flags
& SEC_ALLOC
) != 0)
3570 if ((abfd
->flags
& D_PAGED
) != 0)
3571 off
+= (m
->sections
[0]->vma
- off
) % bed
->maxpagesize
;
3574 bfd_size_type align
;
3577 for (i
= 0, secpp
= m
->sections
; i
< m
->count
; i
++, secpp
++)
3579 bfd_size_type secalign
;
3581 secalign
= bfd_get_section_alignment (abfd
, *secpp
);
3582 if (secalign
> align
)
3586 off
+= (m
->sections
[0]->vma
- off
) % (1 << align
);
3593 p
->p_vaddr
= m
->sections
[0]->vma
;
3595 if (m
->p_paddr_valid
)
3596 p
->p_paddr
= m
->p_paddr
;
3597 else if (m
->count
== 0)
3600 p
->p_paddr
= m
->sections
[0]->lma
;
3602 if (p
->p_type
== PT_LOAD
3603 && (abfd
->flags
& D_PAGED
) != 0)
3604 p
->p_align
= bed
->maxpagesize
;
3605 else if (m
->count
== 0)
3606 p
->p_align
= bed
->s
->file_align
;
3614 if (m
->includes_filehdr
)
3616 if (! m
->p_flags_valid
)
3619 p
->p_filesz
= bed
->s
->sizeof_ehdr
;
3620 p
->p_memsz
= bed
->s
->sizeof_ehdr
;
3623 BFD_ASSERT (p
->p_type
== PT_LOAD
);
3625 if (p
->p_vaddr
< (bfd_vma
) off
)
3627 (*_bfd_error_handler
)
3628 (_("%s: Not enough room for program headers, try linking with -N"),
3629 bfd_get_filename (abfd
));
3630 bfd_set_error (bfd_error_bad_value
);
3635 if (! m
->p_paddr_valid
)
3638 if (p
->p_type
== PT_LOAD
)
3640 filehdr_vaddr
= p
->p_vaddr
;
3641 filehdr_paddr
= p
->p_paddr
;
3645 if (m
->includes_phdrs
)
3647 if (! m
->p_flags_valid
)
3650 if (m
->includes_filehdr
)
3652 if (p
->p_type
== PT_LOAD
)
3654 phdrs_vaddr
= p
->p_vaddr
+ bed
->s
->sizeof_ehdr
;
3655 phdrs_paddr
= p
->p_paddr
+ bed
->s
->sizeof_ehdr
;
3660 p
->p_offset
= bed
->s
->sizeof_ehdr
;
3664 BFD_ASSERT (p
->p_type
== PT_LOAD
);
3665 p
->p_vaddr
-= off
- p
->p_offset
;
3666 if (! m
->p_paddr_valid
)
3667 p
->p_paddr
-= off
- p
->p_offset
;
3670 if (p
->p_type
== PT_LOAD
)
3672 phdrs_vaddr
= p
->p_vaddr
;
3673 phdrs_paddr
= p
->p_paddr
;
3676 phdrs_vaddr
= bed
->maxpagesize
+ bed
->s
->sizeof_ehdr
;
3679 p
->p_filesz
+= alloc
* bed
->s
->sizeof_phdr
;
3680 p
->p_memsz
+= alloc
* bed
->s
->sizeof_phdr
;
3683 if (p
->p_type
== PT_LOAD
3684 || (p
->p_type
== PT_NOTE
&& bfd_get_format (abfd
) == bfd_core
))
3686 if (! m
->includes_filehdr
&& ! m
->includes_phdrs
)
3692 adjust
= off
- (p
->p_offset
+ p
->p_filesz
);
3693 p
->p_filesz
+= adjust
;
3694 p
->p_memsz
+= adjust
;
3700 for (i
= 0, secpp
= m
->sections
; i
< m
->count
; i
++, secpp
++)
3704 bfd_size_type align
;
3708 align
= 1 << bfd_get_section_alignment (abfd
, sec
);
3710 /* The section may have artificial alignment forced by a
3711 link script. Notice this case by the gap between the
3712 cumulative phdr lma and the section's lma. */
3713 if (p
->p_paddr
+ p
->p_memsz
< sec
->lma
)
3715 bfd_vma adjust
= sec
->lma
- (p
->p_paddr
+ p
->p_memsz
);
3717 p
->p_memsz
+= adjust
;
3720 if ((flags
& SEC_LOAD
) != 0)
3721 p
->p_filesz
+= adjust
;
3724 if (p
->p_type
== PT_LOAD
)
3726 bfd_signed_vma adjust
;
3728 if ((flags
& SEC_LOAD
) != 0)
3730 adjust
= sec
->lma
- (p
->p_paddr
+ p
->p_memsz
);
3734 else if ((flags
& SEC_ALLOC
) != 0)
3736 /* The section VMA must equal the file position
3737 modulo the page size. FIXME: I'm not sure if
3738 this adjustment is really necessary. We used to
3739 not have the SEC_LOAD case just above, and then
3740 this was necessary, but now I'm not sure. */
3741 if ((abfd
->flags
& D_PAGED
) != 0)
3742 adjust
= (sec
->vma
- voff
) % bed
->maxpagesize
;
3744 adjust
= (sec
->vma
- voff
) % align
;
3753 (* _bfd_error_handler
) (_("\
3754 Error: First section in segment (%s) starts at 0x%x whereas the segment starts at 0x%x"),
3755 bfd_section_name (abfd
, sec
),
3760 p
->p_memsz
+= adjust
;
3763 if ((flags
& SEC_LOAD
) != 0)
3764 p
->p_filesz
+= adjust
;
3769 /* We check SEC_HAS_CONTENTS here because if NOLOAD is
3770 used in a linker script we may have a section with
3771 SEC_LOAD clear but which is supposed to have
3773 if ((flags
& SEC_LOAD
) != 0
3774 || (flags
& SEC_HAS_CONTENTS
) != 0)
3775 off
+= sec
->_raw_size
;
3777 if ((flags
& SEC_ALLOC
) != 0)
3778 voff
+= sec
->_raw_size
;
3781 if (p
->p_type
== PT_NOTE
&& bfd_get_format (abfd
) == bfd_core
)
3783 /* The actual "note" segment has i == 0.
3784 This is the one that actually contains everything. */
3788 p
->p_filesz
= sec
->_raw_size
;
3789 off
+= sec
->_raw_size
;
3794 /* Fake sections -- don't need to be written. */
3797 flags
= sec
->flags
= 0;
3804 p
->p_memsz
+= sec
->_raw_size
;
3806 if ((flags
& SEC_LOAD
) != 0)
3807 p
->p_filesz
+= sec
->_raw_size
;
3809 if (p
->p_type
== PT_TLS
3810 && sec
->_raw_size
== 0
3811 && (sec
->flags
& SEC_HAS_CONTENTS
) == 0)
3813 struct bfd_link_order
*o
;
3814 bfd_vma tbss_size
= 0;
3816 for (o
= sec
->link_order_head
; o
!= NULL
; o
= o
->next
)
3817 if (tbss_size
< o
->offset
+ o
->size
)
3818 tbss_size
= o
->offset
+ o
->size
;
3820 p
->p_memsz
+= tbss_size
;
3823 if (align
> p
->p_align
3824 && (p
->p_type
!= PT_LOAD
|| (abfd
->flags
& D_PAGED
) == 0))
3828 if (! m
->p_flags_valid
)
3831 if ((flags
& SEC_CODE
) != 0)
3833 if ((flags
& SEC_READONLY
) == 0)
3839 /* Now that we have set the section file positions, we can set up
3840 the file positions for the non PT_LOAD segments. */
3841 for (m
= elf_tdata (abfd
)->segment_map
, p
= phdrs
;
3845 if (p
->p_type
!= PT_LOAD
&& m
->count
> 0)
3847 BFD_ASSERT (! m
->includes_filehdr
&& ! m
->includes_phdrs
);
3848 p
->p_offset
= m
->sections
[0]->filepos
;
3852 if (m
->includes_filehdr
)
3854 p
->p_vaddr
= filehdr_vaddr
;
3855 if (! m
->p_paddr_valid
)
3856 p
->p_paddr
= filehdr_paddr
;
3858 else if (m
->includes_phdrs
)
3860 p
->p_vaddr
= phdrs_vaddr
;
3861 if (! m
->p_paddr_valid
)
3862 p
->p_paddr
= phdrs_paddr
;
3867 /* If additional nonloadable filepos adjustments are required,
3869 if (bed
->set_nonloadable_filepos
)
3870 (*bed
->set_nonloadable_filepos
) (abfd
, phdrs
);
3872 /* Clear out any program headers we allocated but did not use. */
3873 for (; count
< alloc
; count
++, p
++)
3875 memset (p
, 0, sizeof *p
);
3876 p
->p_type
= PT_NULL
;
3879 elf_tdata (abfd
)->phdr
= phdrs
;
3881 elf_tdata (abfd
)->next_file_pos
= off
;
3883 /* Write out the program headers. */
3884 if (bfd_seek (abfd
, (bfd_signed_vma
) bed
->s
->sizeof_ehdr
, SEEK_SET
) != 0
3885 || bed
->s
->write_out_phdrs (abfd
, phdrs
, alloc
) != 0)
3891 /* Get the size of the program header.
3893 If this is called by the linker before any of the section VMA's are set, it
3894 can't calculate the correct value for a strange memory layout. This only
3895 happens when SIZEOF_HEADERS is used in a linker script. In this case,
3896 SORTED_HDRS is NULL and we assume the normal scenario of one text and one
3897 data segment (exclusive of .interp and .dynamic).
3899 ??? User written scripts must either not use SIZEOF_HEADERS, or assume there
3900 will be two segments. */
3902 static bfd_size_type
3903 get_program_header_size (abfd
)
3908 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3910 /* We can't return a different result each time we're called. */
3911 if (elf_tdata (abfd
)->program_header_size
!= 0)
3912 return elf_tdata (abfd
)->program_header_size
;
3914 if (elf_tdata (abfd
)->segment_map
!= NULL
)
3916 struct elf_segment_map
*m
;
3919 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
3921 elf_tdata (abfd
)->program_header_size
= segs
* bed
->s
->sizeof_phdr
;
3922 return elf_tdata (abfd
)->program_header_size
;
3925 /* Assume we will need exactly two PT_LOAD segments: one for text
3926 and one for data. */
3929 s
= bfd_get_section_by_name (abfd
, ".interp");
3930 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0)
3932 /* If we have a loadable interpreter section, we need a
3933 PT_INTERP segment. In this case, assume we also need a
3934 PT_PHDR segment, although that may not be true for all
3939 if (bfd_get_section_by_name (abfd
, ".dynamic") != NULL
)
3941 /* We need a PT_DYNAMIC segment. */
3945 if (elf_tdata (abfd
)->eh_frame_hdr
3946 && bfd_get_section_by_name (abfd
, ".eh_frame_hdr") != NULL
)
3948 /* We need a PT_GNU_EH_FRAME segment. */
3952 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
3954 if ((s
->flags
& SEC_LOAD
) != 0
3955 && strncmp (s
->name
, ".note", 5) == 0)
3957 /* We need a PT_NOTE segment. */
3962 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
3964 if (s
->flags
& SEC_THREAD_LOCAL
)
3966 /* We need a PT_TLS segment. */
3972 /* Let the backend count up any program headers it might need. */
3973 if (bed
->elf_backend_additional_program_headers
)
3977 a
= (*bed
->elf_backend_additional_program_headers
) (abfd
);
3983 elf_tdata (abfd
)->program_header_size
= segs
* bed
->s
->sizeof_phdr
;
3984 return elf_tdata (abfd
)->program_header_size
;
3987 /* Work out the file positions of all the sections. This is called by
3988 _bfd_elf_compute_section_file_positions. All the section sizes and
3989 VMAs must be known before this is called.
3991 We do not consider reloc sections at this point, unless they form
3992 part of the loadable image. Reloc sections are assigned file
3993 positions in assign_file_positions_for_relocs, which is called by
3994 write_object_contents and final_link.
3996 We also don't set the positions of the .symtab and .strtab here. */
3999 assign_file_positions_except_relocs (abfd
)
4002 struct elf_obj_tdata
* const tdata
= elf_tdata (abfd
);
4003 Elf_Internal_Ehdr
* const i_ehdrp
= elf_elfheader (abfd
);
4004 Elf_Internal_Shdr
** const i_shdrpp
= elf_elfsections (abfd
);
4005 unsigned int num_sec
= elf_numsections (abfd
);
4007 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4009 if ((abfd
->flags
& (EXEC_P
| DYNAMIC
)) == 0
4010 && bfd_get_format (abfd
) != bfd_core
)
4012 Elf_Internal_Shdr
**hdrpp
;
4015 /* Start after the ELF header. */
4016 off
= i_ehdrp
->e_ehsize
;
4018 /* We are not creating an executable, which means that we are
4019 not creating a program header, and that the actual order of
4020 the sections in the file is unimportant. */
4021 for (i
= 1, hdrpp
= i_shdrpp
+ 1; i
< num_sec
; i
++, hdrpp
++)
4023 Elf_Internal_Shdr
*hdr
;
4026 if (hdr
->sh_type
== SHT_REL
4027 || hdr
->sh_type
== SHT_RELA
4028 || i
== tdata
->symtab_section
4029 || i
== tdata
->symtab_shndx_section
4030 || i
== tdata
->strtab_section
)
4032 hdr
->sh_offset
= -1;
4035 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, true);
4037 if (i
== SHN_LORESERVE
- 1)
4039 i
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4040 hdrpp
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4047 Elf_Internal_Shdr
**hdrpp
;
4049 /* Assign file positions for the loaded sections based on the
4050 assignment of sections to segments. */
4051 if (! assign_file_positions_for_segments (abfd
))
4054 /* Assign file positions for the other sections. */
4056 off
= elf_tdata (abfd
)->next_file_pos
;
4057 for (i
= 1, hdrpp
= i_shdrpp
+ 1; i
< num_sec
; i
++, hdrpp
++)
4059 Elf_Internal_Shdr
*hdr
;
4062 if (hdr
->bfd_section
!= NULL
4063 && hdr
->bfd_section
->filepos
!= 0)
4064 hdr
->sh_offset
= hdr
->bfd_section
->filepos
;
4065 else if ((hdr
->sh_flags
& SHF_ALLOC
) != 0)
4067 ((*_bfd_error_handler
)
4068 (_("%s: warning: allocated section `%s' not in segment"),
4069 bfd_get_filename (abfd
),
4070 (hdr
->bfd_section
== NULL
4072 : hdr
->bfd_section
->name
)));
4073 if ((abfd
->flags
& D_PAGED
) != 0)
4074 off
+= (hdr
->sh_addr
- off
) % bed
->maxpagesize
;
4076 off
+= (hdr
->sh_addr
- off
) % hdr
->sh_addralign
;
4077 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
,
4080 else if (hdr
->sh_type
== SHT_REL
4081 || hdr
->sh_type
== SHT_RELA
4082 || hdr
== i_shdrpp
[tdata
->symtab_section
]
4083 || hdr
== i_shdrpp
[tdata
->symtab_shndx_section
]
4084 || hdr
== i_shdrpp
[tdata
->strtab_section
])
4085 hdr
->sh_offset
= -1;
4087 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, true);
4089 if (i
== SHN_LORESERVE
- 1)
4091 i
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4092 hdrpp
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4097 /* Place the section headers. */
4098 off
= align_file_position (off
, bed
->s
->file_align
);
4099 i_ehdrp
->e_shoff
= off
;
4100 off
+= i_ehdrp
->e_shnum
* i_ehdrp
->e_shentsize
;
4102 elf_tdata (abfd
)->next_file_pos
= off
;
4111 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
4112 Elf_Internal_Phdr
*i_phdrp
= 0; /* Program header table, internal form */
4113 Elf_Internal_Shdr
**i_shdrp
; /* Section header table, internal form */
4114 struct elf_strtab_hash
*shstrtab
;
4115 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4117 i_ehdrp
= elf_elfheader (abfd
);
4118 i_shdrp
= elf_elfsections (abfd
);
4120 shstrtab
= _bfd_elf_strtab_init ();
4121 if (shstrtab
== NULL
)
4124 elf_shstrtab (abfd
) = shstrtab
;
4126 i_ehdrp
->e_ident
[EI_MAG0
] = ELFMAG0
;
4127 i_ehdrp
->e_ident
[EI_MAG1
] = ELFMAG1
;
4128 i_ehdrp
->e_ident
[EI_MAG2
] = ELFMAG2
;
4129 i_ehdrp
->e_ident
[EI_MAG3
] = ELFMAG3
;
4131 i_ehdrp
->e_ident
[EI_CLASS
] = bed
->s
->elfclass
;
4132 i_ehdrp
->e_ident
[EI_DATA
] =
4133 bfd_big_endian (abfd
) ? ELFDATA2MSB
: ELFDATA2LSB
;
4134 i_ehdrp
->e_ident
[EI_VERSION
] = bed
->s
->ev_current
;
4136 if ((abfd
->flags
& DYNAMIC
) != 0)
4137 i_ehdrp
->e_type
= ET_DYN
;
4138 else if ((abfd
->flags
& EXEC_P
) != 0)
4139 i_ehdrp
->e_type
= ET_EXEC
;
4140 else if (bfd_get_format (abfd
) == bfd_core
)
4141 i_ehdrp
->e_type
= ET_CORE
;
4143 i_ehdrp
->e_type
= ET_REL
;
4145 switch (bfd_get_arch (abfd
))
4147 case bfd_arch_unknown
:
4148 i_ehdrp
->e_machine
= EM_NONE
;
4151 /* There used to be a long list of cases here, each one setting
4152 e_machine to the same EM_* macro #defined as ELF_MACHINE_CODE
4153 in the corresponding bfd definition. To avoid duplication,
4154 the switch was removed. Machines that need special handling
4155 can generally do it in elf_backend_final_write_processing(),
4156 unless they need the information earlier than the final write.
4157 Such need can generally be supplied by replacing the tests for
4158 e_machine with the conditions used to determine it. */
4160 if (get_elf_backend_data (abfd
) != NULL
)
4161 i_ehdrp
->e_machine
= get_elf_backend_data (abfd
)->elf_machine_code
;
4163 i_ehdrp
->e_machine
= EM_NONE
;
4166 i_ehdrp
->e_version
= bed
->s
->ev_current
;
4167 i_ehdrp
->e_ehsize
= bed
->s
->sizeof_ehdr
;
4169 /* No program header, for now. */
4170 i_ehdrp
->e_phoff
= 0;
4171 i_ehdrp
->e_phentsize
= 0;
4172 i_ehdrp
->e_phnum
= 0;
4174 /* Each bfd section is section header entry. */
4175 i_ehdrp
->e_entry
= bfd_get_start_address (abfd
);
4176 i_ehdrp
->e_shentsize
= bed
->s
->sizeof_shdr
;
4178 /* If we're building an executable, we'll need a program header table. */
4179 if (abfd
->flags
& EXEC_P
)
4181 /* It all happens later. */
4183 i_ehdrp
->e_phentsize
= sizeof (Elf_External_Phdr
);
4185 /* elf_build_phdrs() returns a (NULL-terminated) array of
4186 Elf_Internal_Phdrs. */
4187 i_phdrp
= elf_build_phdrs (abfd
, i_ehdrp
, i_shdrp
, &i_ehdrp
->e_phnum
);
4188 i_ehdrp
->e_phoff
= outbase
;
4189 outbase
+= i_ehdrp
->e_phentsize
* i_ehdrp
->e_phnum
;
4194 i_ehdrp
->e_phentsize
= 0;
4196 i_ehdrp
->e_phoff
= 0;
4199 elf_tdata (abfd
)->symtab_hdr
.sh_name
=
4200 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".symtab", false);
4201 elf_tdata (abfd
)->strtab_hdr
.sh_name
=
4202 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".strtab", false);
4203 elf_tdata (abfd
)->shstrtab_hdr
.sh_name
=
4204 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".shstrtab", false);
4205 if (elf_tdata (abfd
)->symtab_hdr
.sh_name
== (unsigned int) -1
4206 || elf_tdata (abfd
)->symtab_hdr
.sh_name
== (unsigned int) -1
4207 || elf_tdata (abfd
)->shstrtab_hdr
.sh_name
== (unsigned int) -1)
4213 /* Assign file positions for all the reloc sections which are not part
4214 of the loadable file image. */
4217 _bfd_elf_assign_file_positions_for_relocs (abfd
)
4221 unsigned int i
, num_sec
;
4222 Elf_Internal_Shdr
**shdrpp
;
4224 off
= elf_tdata (abfd
)->next_file_pos
;
4226 num_sec
= elf_numsections (abfd
);
4227 for (i
= 1, shdrpp
= elf_elfsections (abfd
) + 1; i
< num_sec
; i
++, shdrpp
++)
4229 Elf_Internal_Shdr
*shdrp
;
4232 if ((shdrp
->sh_type
== SHT_REL
|| shdrp
->sh_type
== SHT_RELA
)
4233 && shdrp
->sh_offset
== -1)
4234 off
= _bfd_elf_assign_file_position_for_section (shdrp
, off
, true);
4237 elf_tdata (abfd
)->next_file_pos
= off
;
4241 _bfd_elf_write_object_contents (abfd
)
4244 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4245 Elf_Internal_Ehdr
*i_ehdrp
;
4246 Elf_Internal_Shdr
**i_shdrp
;
4248 unsigned int count
, num_sec
;
4250 if (! abfd
->output_has_begun
4251 && ! _bfd_elf_compute_section_file_positions
4252 (abfd
, (struct bfd_link_info
*) NULL
))
4255 i_shdrp
= elf_elfsections (abfd
);
4256 i_ehdrp
= elf_elfheader (abfd
);
4259 bfd_map_over_sections (abfd
, bed
->s
->write_relocs
, &failed
);
4263 _bfd_elf_assign_file_positions_for_relocs (abfd
);
4265 /* After writing the headers, we need to write the sections too... */
4266 num_sec
= elf_numsections (abfd
);
4267 for (count
= 1; count
< num_sec
; count
++)
4269 if (bed
->elf_backend_section_processing
)
4270 (*bed
->elf_backend_section_processing
) (abfd
, i_shdrp
[count
]);
4271 if (i_shdrp
[count
]->contents
)
4273 bfd_size_type amt
= i_shdrp
[count
]->sh_size
;
4275 if (bfd_seek (abfd
, i_shdrp
[count
]->sh_offset
, SEEK_SET
) != 0
4276 || bfd_bwrite (i_shdrp
[count
]->contents
, amt
, abfd
) != amt
)
4279 if (count
== SHN_LORESERVE
- 1)
4280 count
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4283 /* Write out the section header names. */
4284 if (bfd_seek (abfd
, elf_tdata (abfd
)->shstrtab_hdr
.sh_offset
, SEEK_SET
) != 0
4285 || ! _bfd_elf_strtab_emit (abfd
, elf_shstrtab (abfd
)))
4288 if (bed
->elf_backend_final_write_processing
)
4289 (*bed
->elf_backend_final_write_processing
) (abfd
,
4290 elf_tdata (abfd
)->linker
);
4292 return bed
->s
->write_shdrs_and_ehdr (abfd
);
4296 _bfd_elf_write_corefile_contents (abfd
)
4299 /* Hopefully this can be done just like an object file. */
4300 return _bfd_elf_write_object_contents (abfd
);
4303 /* Given a section, search the header to find them. */
4306 _bfd_elf_section_from_bfd_section (abfd
, asect
)
4310 struct elf_backend_data
*bed
;
4313 if (elf_section_data (asect
) != NULL
4314 && elf_section_data (asect
)->this_idx
!= 0)
4315 return elf_section_data (asect
)->this_idx
;
4317 if (bfd_is_abs_section (asect
))
4319 else if (bfd_is_com_section (asect
))
4321 else if (bfd_is_und_section (asect
))
4325 Elf_Internal_Shdr
**i_shdrp
= elf_elfsections (abfd
);
4326 int maxindex
= elf_numsections (abfd
);
4328 for (index
= 1; index
< maxindex
; index
++)
4330 Elf_Internal_Shdr
*hdr
= i_shdrp
[index
];
4332 if (hdr
!= NULL
&& hdr
->bfd_section
== asect
)
4338 bed
= get_elf_backend_data (abfd
);
4339 if (bed
->elf_backend_section_from_bfd_section
)
4343 if ((*bed
->elf_backend_section_from_bfd_section
) (abfd
, asect
, &retval
))
4348 bfd_set_error (bfd_error_nonrepresentable_section
);
4353 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
4357 _bfd_elf_symbol_from_bfd_symbol (abfd
, asym_ptr_ptr
)
4359 asymbol
**asym_ptr_ptr
;
4361 asymbol
*asym_ptr
= *asym_ptr_ptr
;
4363 flagword flags
= asym_ptr
->flags
;
4365 /* When gas creates relocations against local labels, it creates its
4366 own symbol for the section, but does put the symbol into the
4367 symbol chain, so udata is 0. When the linker is generating
4368 relocatable output, this section symbol may be for one of the
4369 input sections rather than the output section. */
4370 if (asym_ptr
->udata
.i
== 0
4371 && (flags
& BSF_SECTION_SYM
)
4372 && asym_ptr
->section
)
4376 if (asym_ptr
->section
->output_section
!= NULL
)
4377 indx
= asym_ptr
->section
->output_section
->index
;
4379 indx
= asym_ptr
->section
->index
;
4380 if (indx
< elf_num_section_syms (abfd
)
4381 && elf_section_syms (abfd
)[indx
] != NULL
)
4382 asym_ptr
->udata
.i
= elf_section_syms (abfd
)[indx
]->udata
.i
;
4385 idx
= asym_ptr
->udata
.i
;
4389 /* This case can occur when using --strip-symbol on a symbol
4390 which is used in a relocation entry. */
4391 (*_bfd_error_handler
)
4392 (_("%s: symbol `%s' required but not present"),
4393 bfd_archive_filename (abfd
), bfd_asymbol_name (asym_ptr
));
4394 bfd_set_error (bfd_error_no_symbols
);
4401 "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n",
4402 (long) asym_ptr
, asym_ptr
->name
, idx
, flags
,
4403 elf_symbol_flags (flags
));
4411 /* Copy private BFD data. This copies any program header information. */
4414 copy_private_bfd_data (ibfd
, obfd
)
4418 Elf_Internal_Ehdr
* iehdr
;
4419 struct elf_segment_map
* map
;
4420 struct elf_segment_map
* map_first
;
4421 struct elf_segment_map
** pointer_to_map
;
4422 Elf_Internal_Phdr
* segment
;
4425 unsigned int num_segments
;
4426 boolean phdr_included
= false;
4427 bfd_vma maxpagesize
;
4428 struct elf_segment_map
* phdr_adjust_seg
= NULL
;
4429 unsigned int phdr_adjust_num
= 0;
4430 struct elf_backend_data
* bed
;
4432 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
4433 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
4436 if (elf_tdata (ibfd
)->phdr
== NULL
)
4439 bed
= get_elf_backend_data (ibfd
);
4440 iehdr
= elf_elfheader (ibfd
);
4443 pointer_to_map
= &map_first
;
4445 num_segments
= elf_elfheader (ibfd
)->e_phnum
;
4446 maxpagesize
= get_elf_backend_data (obfd
)->maxpagesize
;
4448 /* Returns the end address of the segment + 1. */
4449 #define SEGMENT_END(segment, start) \
4450 (start + (segment->p_memsz > segment->p_filesz \
4451 ? segment->p_memsz : segment->p_filesz))
4453 /* Returns true if the given section is contained within
4454 the given segment. VMA addresses are compared. */
4455 #define IS_CONTAINED_BY_VMA(section, segment) \
4456 (section->vma >= segment->p_vaddr \
4457 && (section->vma + section->_raw_size) \
4458 <= (SEGMENT_END (segment, segment->p_vaddr)))
4460 /* Returns true if the given section is contained within
4461 the given segment. LMA addresses are compared. */
4462 #define IS_CONTAINED_BY_LMA(section, segment, base) \
4463 (section->lma >= base \
4464 && (section->lma + section->_raw_size) \
4465 <= SEGMENT_END (segment, base))
4467 /* Returns true if the given section is contained within the
4468 given segment. Filepos addresses are compared in an elf
4469 backend function. */
4470 #define IS_CONTAINED_BY_FILEPOS(sec, seg, bed) \
4471 (bed->is_contained_by_filepos \
4472 && (*bed->is_contained_by_filepos) (sec, seg))
4474 /* Special case: corefile "NOTE" section containing regs, prpsinfo etc. */
4475 #define IS_COREFILE_NOTE(p, s) \
4476 (p->p_type == PT_NOTE \
4477 && bfd_get_format (ibfd) == bfd_core \
4478 && s->vma == 0 && s->lma == 0 \
4479 && (bfd_vma) s->filepos >= p->p_offset \
4480 && (bfd_vma) s->filepos + s->_raw_size \
4481 <= p->p_offset + p->p_filesz)
4483 /* The complicated case when p_vaddr is 0 is to handle the Solaris
4484 linker, which generates a PT_INTERP section with p_vaddr and
4485 p_memsz set to 0. */
4486 #define IS_SOLARIS_PT_INTERP(p, s) \
4488 && p->p_filesz > 0 \
4489 && (s->flags & SEC_HAS_CONTENTS) != 0 \
4490 && s->_raw_size > 0 \
4491 && (bfd_vma) s->filepos >= p->p_offset \
4492 && ((bfd_vma) s->filepos + s->_raw_size \
4493 <= p->p_offset + p->p_filesz))
4495 /* Decide if the given section should be included in the given segment.
4496 A section will be included if:
4497 1. It is within the address space of the segment -- we use the LMA
4498 if that is set for the segment and the VMA otherwise,
4499 2. It is an allocated segment,
4500 3. There is an output section associated with it,
4501 4. The section has not already been allocated to a previous segment. */
4502 #define INCLUDE_SECTION_IN_SEGMENT(section, segment, bed) \
4503 (((((segment->p_paddr \
4504 ? IS_CONTAINED_BY_LMA (section, segment, segment->p_paddr) \
4505 : IS_CONTAINED_BY_VMA (section, segment)) \
4506 || IS_SOLARIS_PT_INTERP (segment, section)) \
4507 && (section->flags & SEC_ALLOC) != 0) \
4508 || IS_COREFILE_NOTE (segment, section) \
4509 || (IS_CONTAINED_BY_FILEPOS (section, segment, bed) \
4510 && (section->flags & SEC_ALLOC) == 0)) \
4511 && section->output_section != NULL \
4512 && ! section->segment_mark)
4514 /* Returns true iff seg1 starts after the end of seg2. */
4515 #define SEGMENT_AFTER_SEGMENT(seg1, seg2) \
4516 (seg1->p_vaddr >= SEGMENT_END (seg2, seg2->p_vaddr))
4518 /* Returns true iff seg1 and seg2 overlap. */
4519 #define SEGMENT_OVERLAPS(seg1, seg2) \
4520 (!(SEGMENT_AFTER_SEGMENT (seg1, seg2) || SEGMENT_AFTER_SEGMENT (seg2, seg1)))
4522 /* Initialise the segment mark field. */
4523 for (section
= ibfd
->sections
; section
!= NULL
; section
= section
->next
)
4524 section
->segment_mark
= false;
4526 /* Scan through the segments specified in the program header
4527 of the input BFD. For this first scan we look for overlaps
4528 in the loadable segments. These can be created by weird
4529 parameters to objcopy. */
4530 for (i
= 0, segment
= elf_tdata (ibfd
)->phdr
;
4535 Elf_Internal_Phdr
*segment2
;
4537 if (segment
->p_type
!= PT_LOAD
)
4540 /* Determine if this segment overlaps any previous segments. */
4541 for (j
= 0, segment2
= elf_tdata (ibfd
)->phdr
; j
< i
; j
++, segment2
++)
4543 bfd_signed_vma extra_length
;
4545 if (segment2
->p_type
!= PT_LOAD
4546 || ! SEGMENT_OVERLAPS (segment
, segment2
))
4549 /* Merge the two segments together. */
4550 if (segment2
->p_vaddr
< segment
->p_vaddr
)
4552 /* Extend SEGMENT2 to include SEGMENT and then delete
4555 SEGMENT_END (segment
, segment
->p_vaddr
)
4556 - SEGMENT_END (segment2
, segment2
->p_vaddr
);
4558 if (extra_length
> 0)
4560 segment2
->p_memsz
+= extra_length
;
4561 segment2
->p_filesz
+= extra_length
;
4564 segment
->p_type
= PT_NULL
;
4566 /* Since we have deleted P we must restart the outer loop. */
4568 segment
= elf_tdata (ibfd
)->phdr
;
4573 /* Extend SEGMENT to include SEGMENT2 and then delete
4576 SEGMENT_END (segment2
, segment2
->p_vaddr
)
4577 - SEGMENT_END (segment
, segment
->p_vaddr
);
4579 if (extra_length
> 0)
4581 segment
->p_memsz
+= extra_length
;
4582 segment
->p_filesz
+= extra_length
;
4585 segment2
->p_type
= PT_NULL
;
4590 /* The second scan attempts to assign sections to segments. */
4591 for (i
= 0, segment
= elf_tdata (ibfd
)->phdr
;
4595 unsigned int section_count
;
4596 asection
** sections
;
4597 asection
* output_section
;
4599 bfd_vma matching_lma
;
4600 bfd_vma suggested_lma
;
4604 if (segment
->p_type
== PT_NULL
)
4607 /* Compute how many sections might be placed into this segment. */
4609 for (section
= ibfd
->sections
; section
!= NULL
; section
= section
->next
)
4610 if (INCLUDE_SECTION_IN_SEGMENT (section
, segment
, bed
))
4613 /* Allocate a segment map big enough to contain all of the
4614 sections we have selected. */
4615 amt
= sizeof (struct elf_segment_map
);
4616 amt
+= ((bfd_size_type
) section_count
- 1) * sizeof (asection
*);
4617 map
= (struct elf_segment_map
*) bfd_alloc (obfd
, amt
);
4621 /* Initialise the fields of the segment map. Default to
4622 using the physical address of the segment in the input BFD. */
4624 map
->p_type
= segment
->p_type
;
4625 map
->p_flags
= segment
->p_flags
;
4626 map
->p_flags_valid
= 1;
4627 map
->p_paddr
= segment
->p_paddr
;
4628 map
->p_paddr_valid
= 1;
4630 /* Determine if this segment contains the ELF file header
4631 and if it contains the program headers themselves. */
4632 map
->includes_filehdr
= (segment
->p_offset
== 0
4633 && segment
->p_filesz
>= iehdr
->e_ehsize
);
4635 map
->includes_phdrs
= 0;
4637 if (! phdr_included
|| segment
->p_type
!= PT_LOAD
)
4639 map
->includes_phdrs
=
4640 (segment
->p_offset
<= (bfd_vma
) iehdr
->e_phoff
4641 && (segment
->p_offset
+ segment
->p_filesz
4642 >= ((bfd_vma
) iehdr
->e_phoff
4643 + iehdr
->e_phnum
* iehdr
->e_phentsize
)));
4645 if (segment
->p_type
== PT_LOAD
&& map
->includes_phdrs
)
4646 phdr_included
= true;
4649 if (section_count
== 0)
4651 /* Special segments, such as the PT_PHDR segment, may contain
4652 no sections, but ordinary, loadable segments should contain
4653 something. They are allowed by the ELF spec however, so only
4654 a warning is produced. */
4655 if (segment
->p_type
== PT_LOAD
)
4656 (*_bfd_error_handler
)
4657 (_("%s: warning: Empty loadable segment detected, is this intentional ?\n"),
4658 bfd_archive_filename (ibfd
));
4661 *pointer_to_map
= map
;
4662 pointer_to_map
= &map
->next
;
4667 /* Now scan the sections in the input BFD again and attempt
4668 to add their corresponding output sections to the segment map.
4669 The problem here is how to handle an output section which has
4670 been moved (ie had its LMA changed). There are four possibilities:
4672 1. None of the sections have been moved.
4673 In this case we can continue to use the segment LMA from the
4676 2. All of the sections have been moved by the same amount.
4677 In this case we can change the segment's LMA to match the LMA
4678 of the first section.
4680 3. Some of the sections have been moved, others have not.
4681 In this case those sections which have not been moved can be
4682 placed in the current segment which will have to have its size,
4683 and possibly its LMA changed, and a new segment or segments will
4684 have to be created to contain the other sections.
4686 4. The sections have been moved, but not be the same amount.
4687 In this case we can change the segment's LMA to match the LMA
4688 of the first section and we will have to create a new segment
4689 or segments to contain the other sections.
4691 In order to save time, we allocate an array to hold the section
4692 pointers that we are interested in. As these sections get assigned
4693 to a segment, they are removed from this array. */
4695 /* Gcc 2.96 miscompiles this code on mips. Don't do casting here
4696 to work around this long long bug. */
4697 amt
= section_count
* sizeof (asection
*);
4698 sections
= (asection
**) bfd_malloc (amt
);
4699 if (sections
== NULL
)
4702 /* Step One: Scan for segment vs section LMA conflicts.
4703 Also add the sections to the section array allocated above.
4704 Also add the sections to the current segment. In the common
4705 case, where the sections have not been moved, this means that
4706 we have completely filled the segment, and there is nothing
4712 for (j
= 0, section
= ibfd
->sections
;
4714 section
= section
->next
)
4716 if (INCLUDE_SECTION_IN_SEGMENT (section
, segment
, bed
))
4718 output_section
= section
->output_section
;
4720 sections
[j
++] = section
;
4722 /* The Solaris native linker always sets p_paddr to 0.
4723 We try to catch that case here, and set it to the
4725 if (segment
->p_paddr
== 0
4726 && segment
->p_vaddr
!= 0
4728 && output_section
->lma
!= 0
4729 && (output_section
->vma
== (segment
->p_vaddr
4730 + (map
->includes_filehdr
4733 + (map
->includes_phdrs
4735 * iehdr
->e_phentsize
)
4737 map
->p_paddr
= segment
->p_vaddr
;
4739 /* Match up the physical address of the segment with the
4740 LMA address of the output section. */
4741 if (IS_CONTAINED_BY_LMA (output_section
, segment
, map
->p_paddr
)
4742 || IS_CONTAINED_BY_FILEPOS (section
, segment
, bed
)
4743 || IS_COREFILE_NOTE (segment
, section
))
4745 if (matching_lma
== 0)
4746 matching_lma
= output_section
->lma
;
4748 /* We assume that if the section fits within the segment
4749 then it does not overlap any other section within that
4751 map
->sections
[isec
++] = output_section
;
4753 else if (suggested_lma
== 0)
4754 suggested_lma
= output_section
->lma
;
4758 BFD_ASSERT (j
== section_count
);
4760 /* Step Two: Adjust the physical address of the current segment,
4762 if (isec
== section_count
)
4764 /* All of the sections fitted within the segment as currently
4765 specified. This is the default case. Add the segment to
4766 the list of built segments and carry on to process the next
4767 program header in the input BFD. */
4768 map
->count
= section_count
;
4769 *pointer_to_map
= map
;
4770 pointer_to_map
= &map
->next
;
4777 if (matching_lma
!= 0)
4779 /* At least one section fits inside the current segment.
4780 Keep it, but modify its physical address to match the
4781 LMA of the first section that fitted. */
4782 map
->p_paddr
= matching_lma
;
4786 /* None of the sections fitted inside the current segment.
4787 Change the current segment's physical address to match
4788 the LMA of the first section. */
4789 map
->p_paddr
= suggested_lma
;
4792 /* Offset the segment physical address from the lma
4793 to allow for space taken up by elf headers. */
4794 if (map
->includes_filehdr
)
4795 map
->p_paddr
-= iehdr
->e_ehsize
;
4797 if (map
->includes_phdrs
)
4799 map
->p_paddr
-= iehdr
->e_phnum
* iehdr
->e_phentsize
;
4801 /* iehdr->e_phnum is just an estimate of the number
4802 of program headers that we will need. Make a note
4803 here of the number we used and the segment we chose
4804 to hold these headers, so that we can adjust the
4805 offset when we know the correct value. */
4806 phdr_adjust_num
= iehdr
->e_phnum
;
4807 phdr_adjust_seg
= map
;
4811 /* Step Three: Loop over the sections again, this time assigning
4812 those that fit to the current segment and removing them from the
4813 sections array; but making sure not to leave large gaps. Once all
4814 possible sections have been assigned to the current segment it is
4815 added to the list of built segments and if sections still remain
4816 to be assigned, a new segment is constructed before repeating
4824 /* Fill the current segment with sections that fit. */
4825 for (j
= 0; j
< section_count
; j
++)
4827 section
= sections
[j
];
4829 if (section
== NULL
)
4832 output_section
= section
->output_section
;
4834 BFD_ASSERT (output_section
!= NULL
);
4836 if (IS_CONTAINED_BY_LMA (output_section
, segment
, map
->p_paddr
)
4837 || IS_COREFILE_NOTE (segment
, section
))
4839 if (map
->count
== 0)
4841 /* If the first section in a segment does not start at
4842 the beginning of the segment, then something is
4844 if (output_section
->lma
!=
4846 + (map
->includes_filehdr
? iehdr
->e_ehsize
: 0)
4847 + (map
->includes_phdrs
4848 ? iehdr
->e_phnum
* iehdr
->e_phentsize
4854 asection
* prev_sec
;
4856 prev_sec
= map
->sections
[map
->count
- 1];
4858 /* If the gap between the end of the previous section
4859 and the start of this section is more than
4860 maxpagesize then we need to start a new segment. */
4861 if ((BFD_ALIGN (prev_sec
->lma
+ prev_sec
->_raw_size
,
4863 < BFD_ALIGN (output_section
->lma
, maxpagesize
))
4864 || ((prev_sec
->lma
+ prev_sec
->_raw_size
)
4865 > output_section
->lma
))
4867 if (suggested_lma
== 0)
4868 suggested_lma
= output_section
->lma
;
4874 map
->sections
[map
->count
++] = output_section
;
4877 section
->segment_mark
= true;
4879 else if (suggested_lma
== 0)
4880 suggested_lma
= output_section
->lma
;
4883 BFD_ASSERT (map
->count
> 0);
4885 /* Add the current segment to the list of built segments. */
4886 *pointer_to_map
= map
;
4887 pointer_to_map
= &map
->next
;
4889 if (isec
< section_count
)
4891 /* We still have not allocated all of the sections to
4892 segments. Create a new segment here, initialise it
4893 and carry on looping. */
4894 amt
= sizeof (struct elf_segment_map
);
4895 amt
+= ((bfd_size_type
) section_count
- 1) * sizeof (asection
*);
4896 map
= (struct elf_segment_map
*) bfd_alloc (obfd
, amt
);
4900 /* Initialise the fields of the segment map. Set the physical
4901 physical address to the LMA of the first section that has
4902 not yet been assigned. */
4904 map
->p_type
= segment
->p_type
;
4905 map
->p_flags
= segment
->p_flags
;
4906 map
->p_flags_valid
= 1;
4907 map
->p_paddr
= suggested_lma
;
4908 map
->p_paddr_valid
= 1;
4909 map
->includes_filehdr
= 0;
4910 map
->includes_phdrs
= 0;
4913 while (isec
< section_count
);
4918 /* The Solaris linker creates program headers in which all the
4919 p_paddr fields are zero. When we try to objcopy or strip such a
4920 file, we get confused. Check for this case, and if we find it
4921 reset the p_paddr_valid fields. */
4922 for (map
= map_first
; map
!= NULL
; map
= map
->next
)
4923 if (map
->p_paddr
!= 0)
4927 for (map
= map_first
; map
!= NULL
; map
= map
->next
)
4928 map
->p_paddr_valid
= 0;
4931 elf_tdata (obfd
)->segment_map
= map_first
;
4933 /* If we had to estimate the number of program headers that were
4934 going to be needed, then check our estimate now and adjust
4935 the offset if necessary. */
4936 if (phdr_adjust_seg
!= NULL
)
4940 for (count
= 0, map
= map_first
; map
!= NULL
; map
= map
->next
)
4943 if (count
> phdr_adjust_num
)
4944 phdr_adjust_seg
->p_paddr
4945 -= (count
- phdr_adjust_num
) * iehdr
->e_phentsize
;
4949 /* Final Step: Sort the segments into ascending order of physical
4951 if (map_first
!= NULL
)
4953 struct elf_segment_map
*prev
;
4956 for (map
= map_first
->next
; map
!= NULL
; prev
= map
, map
= map
->next
)
4958 /* Yes I know - its a bubble sort.... */
4959 if (map
->next
!= NULL
&& (map
->next
->p_paddr
< map
->p_paddr
))
4961 /* Swap map and map->next. */
4962 prev
->next
= map
->next
;
4963 map
->next
= map
->next
->next
;
4964 prev
->next
->next
= map
;
4974 #undef IS_CONTAINED_BY_VMA
4975 #undef IS_CONTAINED_BY_LMA
4976 #undef IS_CONTAINED_BY_FILEPOS
4977 #undef IS_COREFILE_NOTE
4978 #undef IS_SOLARIS_PT_INTERP
4979 #undef INCLUDE_SECTION_IN_SEGMENT
4980 #undef SEGMENT_AFTER_SEGMENT
4981 #undef SEGMENT_OVERLAPS
4985 /* Copy private section information. This copies over the entsize
4986 field, and sometimes the info field. */
4989 _bfd_elf_copy_private_section_data (ibfd
, isec
, obfd
, osec
)
4995 Elf_Internal_Shdr
*ihdr
, *ohdr
;
4996 const struct elf_backend_data
*bed
= get_elf_backend_data (ibfd
);
4998 if (ibfd
->xvec
->flavour
!= bfd_target_elf_flavour
4999 || obfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
5002 /* Copy over private BFD data if it has not already been copied.
5003 This must be done here, rather than in the copy_private_bfd_data
5004 entry point, because the latter is called after the section
5005 contents have been set, which means that the program headers have
5006 already been worked out. The backend function provides a way to
5007 override the test conditions and code path for the call to
5008 copy_private_bfd_data. */
5009 if (bed
->copy_private_bfd_data_p
)
5011 if ((*bed
->copy_private_bfd_data_p
) (ibfd
, isec
, obfd
, osec
))
5012 if (! copy_private_bfd_data (ibfd
, obfd
))
5015 else if (elf_tdata (obfd
)->segment_map
== NULL
&& elf_tdata (ibfd
)->phdr
!= NULL
)
5019 /* Only set up the segments if there are no more SEC_ALLOC
5020 sections. FIXME: This won't do the right thing if objcopy is
5021 used to remove the last SEC_ALLOC section, since objcopy
5022 won't call this routine in that case. */
5023 for (s
= isec
->next
; s
!= NULL
; s
= s
->next
)
5024 if ((s
->flags
& SEC_ALLOC
) != 0)
5028 if (! copy_private_bfd_data (ibfd
, obfd
))
5033 ihdr
= &elf_section_data (isec
)->this_hdr
;
5034 ohdr
= &elf_section_data (osec
)->this_hdr
;
5036 ohdr
->sh_entsize
= ihdr
->sh_entsize
;
5038 if (ihdr
->sh_type
== SHT_SYMTAB
5039 || ihdr
->sh_type
== SHT_DYNSYM
5040 || ihdr
->sh_type
== SHT_GNU_verneed
5041 || ihdr
->sh_type
== SHT_GNU_verdef
)
5042 ohdr
->sh_info
= ihdr
->sh_info
;
5044 /* Set things up for objcopy. The output SHT_GROUP section will
5045 have its elf_next_in_group pointing back to the input group
5047 elf_next_in_group (osec
) = elf_next_in_group (isec
);
5048 elf_group_name (osec
) = elf_group_name (isec
);
5050 elf_section_data (osec
)->use_rela_p
5051 = elf_section_data (isec
)->use_rela_p
;
5056 /* Copy private symbol information. If this symbol is in a section
5057 which we did not map into a BFD section, try to map the section
5058 index correctly. We use special macro definitions for the mapped
5059 section indices; these definitions are interpreted by the
5060 swap_out_syms function. */
5062 #define MAP_ONESYMTAB (SHN_HIOS + 1)
5063 #define MAP_DYNSYMTAB (SHN_HIOS + 2)
5064 #define MAP_STRTAB (SHN_HIOS + 3)
5065 #define MAP_SHSTRTAB (SHN_HIOS + 4)
5066 #define MAP_SYM_SHNDX (SHN_HIOS + 5)
5069 _bfd_elf_copy_private_symbol_data (ibfd
, isymarg
, obfd
, osymarg
)
5075 elf_symbol_type
*isym
, *osym
;
5077 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
5078 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
5081 isym
= elf_symbol_from (ibfd
, isymarg
);
5082 osym
= elf_symbol_from (obfd
, osymarg
);
5086 && bfd_is_abs_section (isym
->symbol
.section
))
5090 shndx
= isym
->internal_elf_sym
.st_shndx
;
5091 if (shndx
== elf_onesymtab (ibfd
))
5092 shndx
= MAP_ONESYMTAB
;
5093 else if (shndx
== elf_dynsymtab (ibfd
))
5094 shndx
= MAP_DYNSYMTAB
;
5095 else if (shndx
== elf_tdata (ibfd
)->strtab_section
)
5097 else if (shndx
== elf_tdata (ibfd
)->shstrtab_section
)
5098 shndx
= MAP_SHSTRTAB
;
5099 else if (shndx
== elf_tdata (ibfd
)->symtab_shndx_section
)
5100 shndx
= MAP_SYM_SHNDX
;
5101 osym
->internal_elf_sym
.st_shndx
= shndx
;
5107 /* Swap out the symbols. */
5110 swap_out_syms (abfd
, sttp
, relocatable_p
)
5112 struct bfd_strtab_hash
**sttp
;
5115 struct elf_backend_data
*bed
;
5118 struct bfd_strtab_hash
*stt
;
5119 Elf_Internal_Shdr
*symtab_hdr
;
5120 Elf_Internal_Shdr
*symtab_shndx_hdr
;
5121 Elf_Internal_Shdr
*symstrtab_hdr
;
5122 char *outbound_syms
;
5123 char *outbound_shndx
;
5127 if (!elf_map_symbols (abfd
))
5130 /* Dump out the symtabs. */
5131 stt
= _bfd_elf_stringtab_init ();
5135 bed
= get_elf_backend_data (abfd
);
5136 symcount
= bfd_get_symcount (abfd
);
5137 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
5138 symtab_hdr
->sh_type
= SHT_SYMTAB
;
5139 symtab_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
5140 symtab_hdr
->sh_size
= symtab_hdr
->sh_entsize
* (symcount
+ 1);
5141 symtab_hdr
->sh_info
= elf_num_locals (abfd
) + 1;
5142 symtab_hdr
->sh_addralign
= bed
->s
->file_align
;
5144 symstrtab_hdr
= &elf_tdata (abfd
)->strtab_hdr
;
5145 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
5147 amt
= (bfd_size_type
) (1 + symcount
) * bed
->s
->sizeof_sym
;
5148 outbound_syms
= bfd_alloc (abfd
, amt
);
5149 if (outbound_syms
== NULL
)
5151 symtab_hdr
->contents
= (PTR
) outbound_syms
;
5153 outbound_shndx
= NULL
;
5154 symtab_shndx_hdr
= &elf_tdata (abfd
)->symtab_shndx_hdr
;
5155 if (symtab_shndx_hdr
->sh_name
!= 0)
5157 amt
= (bfd_size_type
) (1 + symcount
) * sizeof (Elf_External_Sym_Shndx
);
5158 outbound_shndx
= bfd_zalloc (abfd
, amt
);
5159 if (outbound_shndx
== NULL
)
5161 symtab_shndx_hdr
->contents
= outbound_shndx
;
5162 symtab_shndx_hdr
->sh_type
= SHT_SYMTAB_SHNDX
;
5163 symtab_shndx_hdr
->sh_size
= amt
;
5164 symtab_shndx_hdr
->sh_addralign
= sizeof (Elf_External_Sym_Shndx
);
5165 symtab_shndx_hdr
->sh_entsize
= sizeof (Elf_External_Sym_Shndx
);
5168 /* now generate the data (for "contents") */
5170 /* Fill in zeroth symbol and swap it out. */
5171 Elf_Internal_Sym sym
;
5177 sym
.st_shndx
= SHN_UNDEF
;
5178 bed
->s
->swap_symbol_out (abfd
, &sym
, outbound_syms
, outbound_shndx
);
5179 outbound_syms
+= bed
->s
->sizeof_sym
;
5180 if (outbound_shndx
!= NULL
)
5181 outbound_shndx
+= sizeof (Elf_External_Sym_Shndx
);
5184 syms
= bfd_get_outsymbols (abfd
);
5185 for (idx
= 0; idx
< symcount
; idx
++)
5187 Elf_Internal_Sym sym
;
5188 bfd_vma value
= syms
[idx
]->value
;
5189 elf_symbol_type
*type_ptr
;
5190 flagword flags
= syms
[idx
]->flags
;
5193 if ((flags
& (BSF_SECTION_SYM
| BSF_GLOBAL
)) == BSF_SECTION_SYM
)
5195 /* Local section symbols have no name. */
5200 sym
.st_name
= (unsigned long) _bfd_stringtab_add (stt
,
5203 if (sym
.st_name
== (unsigned long) -1)
5207 type_ptr
= elf_symbol_from (abfd
, syms
[idx
]);
5209 if ((flags
& BSF_SECTION_SYM
) == 0
5210 && bfd_is_com_section (syms
[idx
]->section
))
5212 /* ELF common symbols put the alignment into the `value' field,
5213 and the size into the `size' field. This is backwards from
5214 how BFD handles it, so reverse it here. */
5215 sym
.st_size
= value
;
5216 if (type_ptr
== NULL
5217 || type_ptr
->internal_elf_sym
.st_value
== 0)
5218 sym
.st_value
= value
>= 16 ? 16 : (1 << bfd_log2 (value
));
5220 sym
.st_value
= type_ptr
->internal_elf_sym
.st_value
;
5221 sym
.st_shndx
= _bfd_elf_section_from_bfd_section
5222 (abfd
, syms
[idx
]->section
);
5226 asection
*sec
= syms
[idx
]->section
;
5229 if (sec
->output_section
)
5231 value
+= sec
->output_offset
;
5232 sec
= sec
->output_section
;
5234 /* Don't add in the section vma for relocatable output. */
5235 if (! relocatable_p
)
5237 sym
.st_value
= value
;
5238 sym
.st_size
= type_ptr
? type_ptr
->internal_elf_sym
.st_size
: 0;
5240 if (bfd_is_abs_section (sec
)
5242 && type_ptr
->internal_elf_sym
.st_shndx
!= 0)
5244 /* This symbol is in a real ELF section which we did
5245 not create as a BFD section. Undo the mapping done
5246 by copy_private_symbol_data. */
5247 shndx
= type_ptr
->internal_elf_sym
.st_shndx
;
5251 shndx
= elf_onesymtab (abfd
);
5254 shndx
= elf_dynsymtab (abfd
);
5257 shndx
= elf_tdata (abfd
)->strtab_section
;
5260 shndx
= elf_tdata (abfd
)->shstrtab_section
;
5263 shndx
= elf_tdata (abfd
)->symtab_shndx_section
;
5271 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec
);
5277 /* Writing this would be a hell of a lot easier if
5278 we had some decent documentation on bfd, and
5279 knew what to expect of the library, and what to
5280 demand of applications. For example, it
5281 appears that `objcopy' might not set the
5282 section of a symbol to be a section that is
5283 actually in the output file. */
5284 sec2
= bfd_get_section_by_name (abfd
, sec
->name
);
5285 BFD_ASSERT (sec2
!= 0);
5286 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec2
);
5287 BFD_ASSERT (shndx
!= -1);
5291 sym
.st_shndx
= shndx
;
5294 if ((flags
& BSF_THREAD_LOCAL
) != 0)
5296 else if ((flags
& BSF_FUNCTION
) != 0)
5298 else if ((flags
& BSF_OBJECT
) != 0)
5303 if (syms
[idx
]->section
->flags
& SEC_THREAD_LOCAL
)
5306 /* Processor-specific types */
5307 if (type_ptr
!= NULL
5308 && bed
->elf_backend_get_symbol_type
)
5309 type
= ((*bed
->elf_backend_get_symbol_type
)
5310 (&type_ptr
->internal_elf_sym
, type
));
5312 if (flags
& BSF_SECTION_SYM
)
5314 if (flags
& BSF_GLOBAL
)
5315 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, STT_SECTION
);
5317 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_SECTION
);
5319 else if (bfd_is_com_section (syms
[idx
]->section
))
5320 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, type
);
5321 else if (bfd_is_und_section (syms
[idx
]->section
))
5322 sym
.st_info
= ELF_ST_INFO (((flags
& BSF_WEAK
)
5326 else if (flags
& BSF_FILE
)
5327 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FILE
);
5330 int bind
= STB_LOCAL
;
5332 if (flags
& BSF_LOCAL
)
5334 else if (flags
& BSF_WEAK
)
5336 else if (flags
& BSF_GLOBAL
)
5339 sym
.st_info
= ELF_ST_INFO (bind
, type
);
5342 if (type_ptr
!= NULL
)
5343 sym
.st_other
= type_ptr
->internal_elf_sym
.st_other
;
5347 bed
->s
->swap_symbol_out (abfd
, &sym
, outbound_syms
, outbound_shndx
);
5348 outbound_syms
+= bed
->s
->sizeof_sym
;
5349 if (outbound_shndx
!= NULL
)
5350 outbound_shndx
+= sizeof (Elf_External_Sym_Shndx
);
5354 symstrtab_hdr
->sh_size
= _bfd_stringtab_size (stt
);
5355 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
5357 symstrtab_hdr
->sh_flags
= 0;
5358 symstrtab_hdr
->sh_addr
= 0;
5359 symstrtab_hdr
->sh_entsize
= 0;
5360 symstrtab_hdr
->sh_link
= 0;
5361 symstrtab_hdr
->sh_info
= 0;
5362 symstrtab_hdr
->sh_addralign
= 1;
5367 /* Return the number of bytes required to hold the symtab vector.
5369 Note that we base it on the count plus 1, since we will null terminate
5370 the vector allocated based on this size. However, the ELF symbol table
5371 always has a dummy entry as symbol #0, so it ends up even. */
5374 _bfd_elf_get_symtab_upper_bound (abfd
)
5379 Elf_Internal_Shdr
*hdr
= &elf_tdata (abfd
)->symtab_hdr
;
5381 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
5382 symtab_size
= (symcount
+ 1) * (sizeof (asymbol
*));
5384 symtab_size
-= sizeof (asymbol
*);
5390 _bfd_elf_get_dynamic_symtab_upper_bound (abfd
)
5395 Elf_Internal_Shdr
*hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
5397 if (elf_dynsymtab (abfd
) == 0)
5399 bfd_set_error (bfd_error_invalid_operation
);
5403 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
5404 symtab_size
= (symcount
+ 1) * (sizeof (asymbol
*));
5406 symtab_size
-= sizeof (asymbol
*);
5412 _bfd_elf_get_reloc_upper_bound (abfd
, asect
)
5413 bfd
*abfd ATTRIBUTE_UNUSED
;
5416 return (asect
->reloc_count
+ 1) * sizeof (arelent
*);
5419 /* Canonicalize the relocs. */
5422 _bfd_elf_canonicalize_reloc (abfd
, section
, relptr
, symbols
)
5430 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
5432 if (! bed
->s
->slurp_reloc_table (abfd
, section
, symbols
, false))
5435 tblptr
= section
->relocation
;
5436 for (i
= 0; i
< section
->reloc_count
; i
++)
5437 *relptr
++ = tblptr
++;
5441 return section
->reloc_count
;
5445 _bfd_elf_get_symtab (abfd
, alocation
)
5447 asymbol
**alocation
;
5449 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
5450 long symcount
= bed
->s
->slurp_symbol_table (abfd
, alocation
, false);
5453 bfd_get_symcount (abfd
) = symcount
;
5458 _bfd_elf_canonicalize_dynamic_symtab (abfd
, alocation
)
5460 asymbol
**alocation
;
5462 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
5463 return bed
->s
->slurp_symbol_table (abfd
, alocation
, true);
5466 /* Return the size required for the dynamic reloc entries. Any
5467 section that was actually installed in the BFD, and has type
5468 SHT_REL or SHT_RELA, and uses the dynamic symbol table, is
5469 considered to be a dynamic reloc section. */
5472 _bfd_elf_get_dynamic_reloc_upper_bound (abfd
)
5478 if (elf_dynsymtab (abfd
) == 0)
5480 bfd_set_error (bfd_error_invalid_operation
);
5484 ret
= sizeof (arelent
*);
5485 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
5486 if (elf_section_data (s
)->this_hdr
.sh_link
== elf_dynsymtab (abfd
)
5487 && (elf_section_data (s
)->this_hdr
.sh_type
== SHT_REL
5488 || elf_section_data (s
)->this_hdr
.sh_type
== SHT_RELA
))
5489 ret
+= ((s
->_raw_size
/ elf_section_data (s
)->this_hdr
.sh_entsize
)
5490 * sizeof (arelent
*));
5495 /* Canonicalize the dynamic relocation entries. Note that we return
5496 the dynamic relocations as a single block, although they are
5497 actually associated with particular sections; the interface, which
5498 was designed for SunOS style shared libraries, expects that there
5499 is only one set of dynamic relocs. Any section that was actually
5500 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses
5501 the dynamic symbol table, is considered to be a dynamic reloc
5505 _bfd_elf_canonicalize_dynamic_reloc (abfd
, storage
, syms
)
5510 boolean (*slurp_relocs
) PARAMS ((bfd
*, asection
*, asymbol
**, boolean
));
5514 if (elf_dynsymtab (abfd
) == 0)
5516 bfd_set_error (bfd_error_invalid_operation
);
5520 slurp_relocs
= get_elf_backend_data (abfd
)->s
->slurp_reloc_table
;
5522 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
5524 if (elf_section_data (s
)->this_hdr
.sh_link
== elf_dynsymtab (abfd
)
5525 && (elf_section_data (s
)->this_hdr
.sh_type
== SHT_REL
5526 || elf_section_data (s
)->this_hdr
.sh_type
== SHT_RELA
))
5531 if (! (*slurp_relocs
) (abfd
, s
, syms
, true))
5533 count
= s
->_raw_size
/ elf_section_data (s
)->this_hdr
.sh_entsize
;
5535 for (i
= 0; i
< count
; i
++)
5546 /* Read in the version information. */
5549 _bfd_elf_slurp_version_tables (abfd
)
5552 bfd_byte
*contents
= NULL
;
5555 if (elf_dynverdef (abfd
) != 0)
5557 Elf_Internal_Shdr
*hdr
;
5558 Elf_External_Verdef
*everdef
;
5559 Elf_Internal_Verdef
*iverdef
;
5560 Elf_Internal_Verdef
*iverdefarr
;
5561 Elf_Internal_Verdef iverdefmem
;
5563 unsigned int maxidx
;
5565 hdr
= &elf_tdata (abfd
)->dynverdef_hdr
;
5567 contents
= (bfd_byte
*) bfd_malloc (hdr
->sh_size
);
5568 if (contents
== NULL
)
5570 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
5571 || bfd_bread ((PTR
) contents
, hdr
->sh_size
, abfd
) != hdr
->sh_size
)
5574 /* We know the number of entries in the section but not the maximum
5575 index. Therefore we have to run through all entries and find
5577 everdef
= (Elf_External_Verdef
*) contents
;
5579 for (i
= 0; i
< hdr
->sh_info
; ++i
)
5581 _bfd_elf_swap_verdef_in (abfd
, everdef
, &iverdefmem
);
5583 if ((iverdefmem
.vd_ndx
& ((unsigned) VERSYM_VERSION
)) > maxidx
)
5584 maxidx
= iverdefmem
.vd_ndx
& ((unsigned) VERSYM_VERSION
);
5586 everdef
= ((Elf_External_Verdef
*)
5587 ((bfd_byte
*) everdef
+ iverdefmem
.vd_next
));
5590 amt
= (bfd_size_type
) maxidx
* sizeof (Elf_Internal_Verdef
);
5591 elf_tdata (abfd
)->verdef
= (Elf_Internal_Verdef
*) bfd_zalloc (abfd
, amt
);
5592 if (elf_tdata (abfd
)->verdef
== NULL
)
5595 elf_tdata (abfd
)->cverdefs
= maxidx
;
5597 everdef
= (Elf_External_Verdef
*) contents
;
5598 iverdefarr
= elf_tdata (abfd
)->verdef
;
5599 for (i
= 0; i
< hdr
->sh_info
; i
++)
5601 Elf_External_Verdaux
*everdaux
;
5602 Elf_Internal_Verdaux
*iverdaux
;
5605 _bfd_elf_swap_verdef_in (abfd
, everdef
, &iverdefmem
);
5607 iverdef
= &iverdefarr
[(iverdefmem
.vd_ndx
& VERSYM_VERSION
) - 1];
5608 memcpy (iverdef
, &iverdefmem
, sizeof (Elf_Internal_Verdef
));
5610 iverdef
->vd_bfd
= abfd
;
5612 amt
= (bfd_size_type
) iverdef
->vd_cnt
* sizeof (Elf_Internal_Verdaux
);
5613 iverdef
->vd_auxptr
= (Elf_Internal_Verdaux
*) bfd_alloc (abfd
, amt
);
5614 if (iverdef
->vd_auxptr
== NULL
)
5617 everdaux
= ((Elf_External_Verdaux
*)
5618 ((bfd_byte
*) everdef
+ iverdef
->vd_aux
));
5619 iverdaux
= iverdef
->vd_auxptr
;
5620 for (j
= 0; j
< iverdef
->vd_cnt
; j
++, iverdaux
++)
5622 _bfd_elf_swap_verdaux_in (abfd
, everdaux
, iverdaux
);
5624 iverdaux
->vda_nodename
=
5625 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
5626 iverdaux
->vda_name
);
5627 if (iverdaux
->vda_nodename
== NULL
)
5630 if (j
+ 1 < iverdef
->vd_cnt
)
5631 iverdaux
->vda_nextptr
= iverdaux
+ 1;
5633 iverdaux
->vda_nextptr
= NULL
;
5635 everdaux
= ((Elf_External_Verdaux
*)
5636 ((bfd_byte
*) everdaux
+ iverdaux
->vda_next
));
5639 iverdef
->vd_nodename
= iverdef
->vd_auxptr
->vda_nodename
;
5641 if (i
+ 1 < hdr
->sh_info
)
5642 iverdef
->vd_nextdef
= iverdef
+ 1;
5644 iverdef
->vd_nextdef
= NULL
;
5646 everdef
= ((Elf_External_Verdef
*)
5647 ((bfd_byte
*) everdef
+ iverdef
->vd_next
));
5654 if (elf_dynverref (abfd
) != 0)
5656 Elf_Internal_Shdr
*hdr
;
5657 Elf_External_Verneed
*everneed
;
5658 Elf_Internal_Verneed
*iverneed
;
5661 hdr
= &elf_tdata (abfd
)->dynverref_hdr
;
5663 amt
= (bfd_size_type
) hdr
->sh_info
* sizeof (Elf_Internal_Verneed
);
5664 elf_tdata (abfd
)->verref
=
5665 (Elf_Internal_Verneed
*) bfd_zalloc (abfd
, amt
);
5666 if (elf_tdata (abfd
)->verref
== NULL
)
5669 elf_tdata (abfd
)->cverrefs
= hdr
->sh_info
;
5671 contents
= (bfd_byte
*) bfd_malloc (hdr
->sh_size
);
5672 if (contents
== NULL
)
5674 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
5675 || bfd_bread ((PTR
) contents
, hdr
->sh_size
, abfd
) != hdr
->sh_size
)
5678 everneed
= (Elf_External_Verneed
*) contents
;
5679 iverneed
= elf_tdata (abfd
)->verref
;
5680 for (i
= 0; i
< hdr
->sh_info
; i
++, iverneed
++)
5682 Elf_External_Vernaux
*evernaux
;
5683 Elf_Internal_Vernaux
*ivernaux
;
5686 _bfd_elf_swap_verneed_in (abfd
, everneed
, iverneed
);
5688 iverneed
->vn_bfd
= abfd
;
5690 iverneed
->vn_filename
=
5691 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
5693 if (iverneed
->vn_filename
== NULL
)
5696 amt
= iverneed
->vn_cnt
;
5697 amt
*= sizeof (Elf_Internal_Vernaux
);
5698 iverneed
->vn_auxptr
= (Elf_Internal_Vernaux
*) bfd_alloc (abfd
, amt
);
5700 evernaux
= ((Elf_External_Vernaux
*)
5701 ((bfd_byte
*) everneed
+ iverneed
->vn_aux
));
5702 ivernaux
= iverneed
->vn_auxptr
;
5703 for (j
= 0; j
< iverneed
->vn_cnt
; j
++, ivernaux
++)
5705 _bfd_elf_swap_vernaux_in (abfd
, evernaux
, ivernaux
);
5707 ivernaux
->vna_nodename
=
5708 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
5709 ivernaux
->vna_name
);
5710 if (ivernaux
->vna_nodename
== NULL
)
5713 if (j
+ 1 < iverneed
->vn_cnt
)
5714 ivernaux
->vna_nextptr
= ivernaux
+ 1;
5716 ivernaux
->vna_nextptr
= NULL
;
5718 evernaux
= ((Elf_External_Vernaux
*)
5719 ((bfd_byte
*) evernaux
+ ivernaux
->vna_next
));
5722 if (i
+ 1 < hdr
->sh_info
)
5723 iverneed
->vn_nextref
= iverneed
+ 1;
5725 iverneed
->vn_nextref
= NULL
;
5727 everneed
= ((Elf_External_Verneed
*)
5728 ((bfd_byte
*) everneed
+ iverneed
->vn_next
));
5738 if (contents
== NULL
)
5744 _bfd_elf_make_empty_symbol (abfd
)
5747 elf_symbol_type
*newsym
;
5748 bfd_size_type amt
= sizeof (elf_symbol_type
);
5750 newsym
= (elf_symbol_type
*) bfd_zalloc (abfd
, amt
);
5755 newsym
->symbol
.the_bfd
= abfd
;
5756 return &newsym
->symbol
;
5761 _bfd_elf_get_symbol_info (ignore_abfd
, symbol
, ret
)
5762 bfd
*ignore_abfd ATTRIBUTE_UNUSED
;
5766 bfd_symbol_info (symbol
, ret
);
5769 /* Return whether a symbol name implies a local symbol. Most targets
5770 use this function for the is_local_label_name entry point, but some
5774 _bfd_elf_is_local_label_name (abfd
, name
)
5775 bfd
*abfd ATTRIBUTE_UNUSED
;
5778 /* Normal local symbols start with ``.L''. */
5779 if (name
[0] == '.' && name
[1] == 'L')
5782 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
5783 DWARF debugging symbols starting with ``..''. */
5784 if (name
[0] == '.' && name
[1] == '.')
5787 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
5788 emitting DWARF debugging output. I suspect this is actually a
5789 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
5790 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
5791 underscore to be emitted on some ELF targets). For ease of use,
5792 we treat such symbols as local. */
5793 if (name
[0] == '_' && name
[1] == '.' && name
[2] == 'L' && name
[3] == '_')
5800 _bfd_elf_get_lineno (ignore_abfd
, symbol
)
5801 bfd
*ignore_abfd ATTRIBUTE_UNUSED
;
5802 asymbol
*symbol ATTRIBUTE_UNUSED
;
5809 _bfd_elf_set_arch_mach (abfd
, arch
, machine
)
5811 enum bfd_architecture arch
;
5812 unsigned long machine
;
5814 /* If this isn't the right architecture for this backend, and this
5815 isn't the generic backend, fail. */
5816 if (arch
!= get_elf_backend_data (abfd
)->arch
5817 && arch
!= bfd_arch_unknown
5818 && get_elf_backend_data (abfd
)->arch
!= bfd_arch_unknown
)
5821 return bfd_default_set_arch_mach (abfd
, arch
, machine
);
5824 /* Find the function to a particular section and offset,
5825 for error reporting. */
5828 elf_find_function (abfd
, section
, symbols
, offset
,
5829 filename_ptr
, functionname_ptr
)
5830 bfd
*abfd ATTRIBUTE_UNUSED
;
5834 const char **filename_ptr
;
5835 const char **functionname_ptr
;
5837 const char *filename
;
5846 for (p
= symbols
; *p
!= NULL
; p
++)
5850 q
= (elf_symbol_type
*) *p
;
5852 if (bfd_get_section (&q
->symbol
) != section
)
5855 switch (ELF_ST_TYPE (q
->internal_elf_sym
.st_info
))
5860 filename
= bfd_asymbol_name (&q
->symbol
);
5864 if (q
->symbol
.section
== section
5865 && q
->symbol
.value
>= low_func
5866 && q
->symbol
.value
<= offset
)
5868 func
= (asymbol
*) q
;
5869 low_func
= q
->symbol
.value
;
5879 *filename_ptr
= filename
;
5880 if (functionname_ptr
)
5881 *functionname_ptr
= bfd_asymbol_name (func
);
5886 /* Find the nearest line to a particular section and offset,
5887 for error reporting. */
5890 _bfd_elf_find_nearest_line (abfd
, section
, symbols
, offset
,
5891 filename_ptr
, functionname_ptr
, line_ptr
)
5896 const char **filename_ptr
;
5897 const char **functionname_ptr
;
5898 unsigned int *line_ptr
;
5902 if (_bfd_dwarf1_find_nearest_line (abfd
, section
, symbols
, offset
,
5903 filename_ptr
, functionname_ptr
,
5906 if (!*functionname_ptr
)
5907 elf_find_function (abfd
, section
, symbols
, offset
,
5908 *filename_ptr
? NULL
: filename_ptr
,
5914 if (_bfd_dwarf2_find_nearest_line (abfd
, section
, symbols
, offset
,
5915 filename_ptr
, functionname_ptr
,
5917 &elf_tdata (abfd
)->dwarf2_find_line_info
))
5919 if (!*functionname_ptr
)
5920 elf_find_function (abfd
, section
, symbols
, offset
,
5921 *filename_ptr
? NULL
: filename_ptr
,
5927 if (! _bfd_stab_section_find_nearest_line (abfd
, symbols
, section
, offset
,
5928 &found
, filename_ptr
,
5929 functionname_ptr
, line_ptr
,
5930 &elf_tdata (abfd
)->line_info
))
5935 if (symbols
== NULL
)
5938 if (! elf_find_function (abfd
, section
, symbols
, offset
,
5939 filename_ptr
, functionname_ptr
))
5947 _bfd_elf_sizeof_headers (abfd
, reloc
)
5953 ret
= get_elf_backend_data (abfd
)->s
->sizeof_ehdr
;
5955 ret
+= get_program_header_size (abfd
);
5960 _bfd_elf_set_section_contents (abfd
, section
, location
, offset
, count
)
5965 bfd_size_type count
;
5967 Elf_Internal_Shdr
*hdr
;
5970 if (! abfd
->output_has_begun
5971 && ! (_bfd_elf_compute_section_file_positions
5972 (abfd
, (struct bfd_link_info
*) NULL
)))
5975 hdr
= &elf_section_data (section
)->this_hdr
;
5976 pos
= hdr
->sh_offset
+ offset
;
5977 if (bfd_seek (abfd
, pos
, SEEK_SET
) != 0
5978 || bfd_bwrite (location
, count
, abfd
) != count
)
5985 _bfd_elf_no_info_to_howto (abfd
, cache_ptr
, dst
)
5986 bfd
*abfd ATTRIBUTE_UNUSED
;
5987 arelent
*cache_ptr ATTRIBUTE_UNUSED
;
5988 Elf_Internal_Rela
*dst ATTRIBUTE_UNUSED
;
5995 _bfd_elf_no_info_to_howto_rel (abfd
, cache_ptr
, dst
)
5998 Elf_Internal_Rel
*dst
;
6004 /* Try to convert a non-ELF reloc into an ELF one. */
6007 _bfd_elf_validate_reloc (abfd
, areloc
)
6011 /* Check whether we really have an ELF howto. */
6013 if ((*areloc
->sym_ptr_ptr
)->the_bfd
->xvec
!= abfd
->xvec
)
6015 bfd_reloc_code_real_type code
;
6016 reloc_howto_type
*howto
;
6018 /* Alien reloc: Try to determine its type to replace it with an
6019 equivalent ELF reloc. */
6021 if (areloc
->howto
->pc_relative
)
6023 switch (areloc
->howto
->bitsize
)
6026 code
= BFD_RELOC_8_PCREL
;
6029 code
= BFD_RELOC_12_PCREL
;
6032 code
= BFD_RELOC_16_PCREL
;
6035 code
= BFD_RELOC_24_PCREL
;
6038 code
= BFD_RELOC_32_PCREL
;
6041 code
= BFD_RELOC_64_PCREL
;
6047 howto
= bfd_reloc_type_lookup (abfd
, code
);
6049 if (areloc
->howto
->pcrel_offset
!= howto
->pcrel_offset
)
6051 if (howto
->pcrel_offset
)
6052 areloc
->addend
+= areloc
->address
;
6054 areloc
->addend
-= areloc
->address
; /* addend is unsigned!! */
6059 switch (areloc
->howto
->bitsize
)
6065 code
= BFD_RELOC_14
;
6068 code
= BFD_RELOC_16
;
6071 code
= BFD_RELOC_26
;
6074 code
= BFD_RELOC_32
;
6077 code
= BFD_RELOC_64
;
6083 howto
= bfd_reloc_type_lookup (abfd
, code
);
6087 areloc
->howto
= howto
;
6095 (*_bfd_error_handler
)
6096 (_("%s: unsupported relocation type %s"),
6097 bfd_archive_filename (abfd
), areloc
->howto
->name
);
6098 bfd_set_error (bfd_error_bad_value
);
6103 _bfd_elf_close_and_cleanup (abfd
)
6106 if (bfd_get_format (abfd
) == bfd_object
)
6108 if (elf_shstrtab (abfd
) != NULL
)
6109 _bfd_elf_strtab_free (elf_shstrtab (abfd
));
6112 return _bfd_generic_close_and_cleanup (abfd
);
6115 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
6116 in the relocation's offset. Thus we cannot allow any sort of sanity
6117 range-checking to interfere. There is nothing else to do in processing
6120 bfd_reloc_status_type
6121 _bfd_elf_rel_vtable_reloc_fn (abfd
, re
, symbol
, data
, is
, obfd
, errmsg
)
6122 bfd
*abfd ATTRIBUTE_UNUSED
;
6123 arelent
*re ATTRIBUTE_UNUSED
;
6124 struct symbol_cache_entry
*symbol ATTRIBUTE_UNUSED
;
6125 PTR data ATTRIBUTE_UNUSED
;
6126 asection
*is ATTRIBUTE_UNUSED
;
6127 bfd
*obfd ATTRIBUTE_UNUSED
;
6128 char **errmsg ATTRIBUTE_UNUSED
;
6130 return bfd_reloc_ok
;
6133 /* Elf core file support. Much of this only works on native
6134 toolchains, since we rely on knowing the
6135 machine-dependent procfs structure in order to pick
6136 out details about the corefile. */
6138 #ifdef HAVE_SYS_PROCFS_H
6139 # include <sys/procfs.h>
6142 /* FIXME: this is kinda wrong, but it's what gdb wants. */
6145 elfcore_make_pid (abfd
)
6148 return ((elf_tdata (abfd
)->core_lwpid
<< 16)
6149 + (elf_tdata (abfd
)->core_pid
));
6152 /* If there isn't a section called NAME, make one, using
6153 data from SECT. Note, this function will generate a
6154 reference to NAME, so you shouldn't deallocate or
6158 elfcore_maybe_make_sect (abfd
, name
, sect
)
6165 if (bfd_get_section_by_name (abfd
, name
) != NULL
)
6168 sect2
= bfd_make_section (abfd
, name
);
6172 sect2
->_raw_size
= sect
->_raw_size
;
6173 sect2
->filepos
= sect
->filepos
;
6174 sect2
->flags
= sect
->flags
;
6175 sect2
->alignment_power
= sect
->alignment_power
;
6179 /* Create a pseudosection containing SIZE bytes at FILEPOS. This
6180 actually creates up to two pseudosections:
6181 - For the single-threaded case, a section named NAME, unless
6182 such a section already exists.
6183 - For the multi-threaded case, a section named "NAME/PID", where
6184 PID is elfcore_make_pid (abfd).
6185 Both pseudosections have identical contents. */
6187 _bfd_elfcore_make_pseudosection (abfd
, name
, size
, filepos
)
6194 char *threaded_name
;
6198 /* Build the section name. */
6200 sprintf (buf
, "%s/%d", name
, elfcore_make_pid (abfd
));
6201 len
= strlen (buf
) + 1;
6202 threaded_name
= bfd_alloc (abfd
, (bfd_size_type
) len
);
6203 if (threaded_name
== NULL
)
6205 memcpy (threaded_name
, buf
, len
);
6207 sect
= bfd_make_section (abfd
, threaded_name
);
6210 sect
->_raw_size
= size
;
6211 sect
->filepos
= filepos
;
6212 sect
->flags
= SEC_HAS_CONTENTS
;
6213 sect
->alignment_power
= 2;
6215 return elfcore_maybe_make_sect (abfd
, name
, sect
);
6218 /* prstatus_t exists on:
6220 linux 2.[01] + glibc
6224 #if defined (HAVE_PRSTATUS_T)
6225 static boolean elfcore_grok_prstatus
PARAMS ((bfd
*, Elf_Internal_Note
*));
6228 elfcore_grok_prstatus (abfd
, note
)
6230 Elf_Internal_Note
*note
;
6235 if (note
->descsz
== sizeof (prstatus_t
))
6239 raw_size
= sizeof (prstat
.pr_reg
);
6240 offset
= offsetof (prstatus_t
, pr_reg
);
6241 memcpy (&prstat
, note
->descdata
, sizeof (prstat
));
6243 /* Do not overwrite the core signal if it
6244 has already been set by another thread. */
6245 if (elf_tdata (abfd
)->core_signal
== 0)
6246 elf_tdata (abfd
)->core_signal
= prstat
.pr_cursig
;
6247 elf_tdata (abfd
)->core_pid
= prstat
.pr_pid
;
6249 /* pr_who exists on:
6252 pr_who doesn't exist on:
6255 #if defined (HAVE_PRSTATUS_T_PR_WHO)
6256 elf_tdata (abfd
)->core_lwpid
= prstat
.pr_who
;
6259 #if defined (HAVE_PRSTATUS32_T)
6260 else if (note
->descsz
== sizeof (prstatus32_t
))
6262 /* 64-bit host, 32-bit corefile */
6263 prstatus32_t prstat
;
6265 raw_size
= sizeof (prstat
.pr_reg
);
6266 offset
= offsetof (prstatus32_t
, pr_reg
);
6267 memcpy (&prstat
, note
->descdata
, sizeof (prstat
));
6269 /* Do not overwrite the core signal if it
6270 has already been set by another thread. */
6271 if (elf_tdata (abfd
)->core_signal
== 0)
6272 elf_tdata (abfd
)->core_signal
= prstat
.pr_cursig
;
6273 elf_tdata (abfd
)->core_pid
= prstat
.pr_pid
;
6275 /* pr_who exists on:
6278 pr_who doesn't exist on:
6281 #if defined (HAVE_PRSTATUS32_T_PR_WHO)
6282 elf_tdata (abfd
)->core_lwpid
= prstat
.pr_who
;
6285 #endif /* HAVE_PRSTATUS32_T */
6288 /* Fail - we don't know how to handle any other
6289 note size (ie. data object type). */
6293 /* Make a ".reg/999" section and a ".reg" section. */
6294 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
6295 raw_size
, note
->descpos
+ offset
);
6297 #endif /* defined (HAVE_PRSTATUS_T) */
6299 /* Create a pseudosection containing the exact contents of NOTE. */
6301 elfcore_make_note_pseudosection (abfd
, name
, note
)
6304 Elf_Internal_Note
*note
;
6306 return _bfd_elfcore_make_pseudosection (abfd
, name
,
6307 note
->descsz
, note
->descpos
);
6310 /* There isn't a consistent prfpregset_t across platforms,
6311 but it doesn't matter, because we don't have to pick this
6312 data structure apart. */
6315 elfcore_grok_prfpreg (abfd
, note
)
6317 Elf_Internal_Note
*note
;
6319 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
6322 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
6323 type of 5 (NT_PRXFPREG). Just include the whole note's contents
6327 elfcore_grok_prxfpreg (abfd
, note
)
6329 Elf_Internal_Note
*note
;
6331 return elfcore_make_note_pseudosection (abfd
, ".reg-xfp", note
);
6334 #if defined (HAVE_PRPSINFO_T)
6335 typedef prpsinfo_t elfcore_psinfo_t
;
6336 #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
6337 typedef prpsinfo32_t elfcore_psinfo32_t
;
6341 #if defined (HAVE_PSINFO_T)
6342 typedef psinfo_t elfcore_psinfo_t
;
6343 #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
6344 typedef psinfo32_t elfcore_psinfo32_t
;
6348 /* return a malloc'ed copy of a string at START which is at
6349 most MAX bytes long, possibly without a terminating '\0'.
6350 the copy will always have a terminating '\0'. */
6353 _bfd_elfcore_strndup (abfd
, start
, max
)
6359 char *end
= memchr (start
, '\0', max
);
6367 dups
= bfd_alloc (abfd
, (bfd_size_type
) len
+ 1);
6371 memcpy (dups
, start
, len
);
6377 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
6378 static boolean elfcore_grok_psinfo
PARAMS ((bfd
*, Elf_Internal_Note
*));
6381 elfcore_grok_psinfo (abfd
, note
)
6383 Elf_Internal_Note
*note
;
6385 if (note
->descsz
== sizeof (elfcore_psinfo_t
))
6387 elfcore_psinfo_t psinfo
;
6389 memcpy (&psinfo
, note
->descdata
, sizeof (psinfo
));
6391 elf_tdata (abfd
)->core_program
6392 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_fname
,
6393 sizeof (psinfo
.pr_fname
));
6395 elf_tdata (abfd
)->core_command
6396 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_psargs
,
6397 sizeof (psinfo
.pr_psargs
));
6399 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
6400 else if (note
->descsz
== sizeof (elfcore_psinfo32_t
))
6402 /* 64-bit host, 32-bit corefile */
6403 elfcore_psinfo32_t psinfo
;
6405 memcpy (&psinfo
, note
->descdata
, sizeof (psinfo
));
6407 elf_tdata (abfd
)->core_program
6408 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_fname
,
6409 sizeof (psinfo
.pr_fname
));
6411 elf_tdata (abfd
)->core_command
6412 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_psargs
,
6413 sizeof (psinfo
.pr_psargs
));
6419 /* Fail - we don't know how to handle any other
6420 note size (ie. data object type). */
6424 /* Note that for some reason, a spurious space is tacked
6425 onto the end of the args in some (at least one anyway)
6426 implementations, so strip it off if it exists. */
6429 char *command
= elf_tdata (abfd
)->core_command
;
6430 int n
= strlen (command
);
6432 if (0 < n
&& command
[n
- 1] == ' ')
6433 command
[n
- 1] = '\0';
6438 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
6440 #if defined (HAVE_PSTATUS_T)
6441 static boolean elfcore_grok_pstatus
PARAMS ((bfd
*, Elf_Internal_Note
*));
6444 elfcore_grok_pstatus (abfd
, note
)
6446 Elf_Internal_Note
*note
;
6448 if (note
->descsz
== sizeof (pstatus_t
)
6449 #if defined (HAVE_PXSTATUS_T)
6450 || note
->descsz
== sizeof (pxstatus_t
)
6456 memcpy (&pstat
, note
->descdata
, sizeof (pstat
));
6458 elf_tdata (abfd
)->core_pid
= pstat
.pr_pid
;
6460 #if defined (HAVE_PSTATUS32_T)
6461 else if (note
->descsz
== sizeof (pstatus32_t
))
6463 /* 64-bit host, 32-bit corefile */
6466 memcpy (&pstat
, note
->descdata
, sizeof (pstat
));
6468 elf_tdata (abfd
)->core_pid
= pstat
.pr_pid
;
6471 /* Could grab some more details from the "representative"
6472 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
6473 NT_LWPSTATUS note, presumably. */
6477 #endif /* defined (HAVE_PSTATUS_T) */
6479 #if defined (HAVE_LWPSTATUS_T)
6480 static boolean elfcore_grok_lwpstatus
PARAMS ((bfd
*, Elf_Internal_Note
*));
6483 elfcore_grok_lwpstatus (abfd
, note
)
6485 Elf_Internal_Note
*note
;
6487 lwpstatus_t lwpstat
;
6493 if (note
->descsz
!= sizeof (lwpstat
)
6494 #if defined (HAVE_LWPXSTATUS_T)
6495 && note
->descsz
!= sizeof (lwpxstatus_t
)
6500 memcpy (&lwpstat
, note
->descdata
, sizeof (lwpstat
));
6502 elf_tdata (abfd
)->core_lwpid
= lwpstat
.pr_lwpid
;
6503 elf_tdata (abfd
)->core_signal
= lwpstat
.pr_cursig
;
6505 /* Make a ".reg/999" section. */
6507 sprintf (buf
, ".reg/%d", elfcore_make_pid (abfd
));
6508 len
= strlen (buf
) + 1;
6509 name
= bfd_alloc (abfd
, (bfd_size_type
) len
);
6512 memcpy (name
, buf
, len
);
6514 sect
= bfd_make_section (abfd
, name
);
6518 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
6519 sect
->_raw_size
= sizeof (lwpstat
.pr_context
.uc_mcontext
.gregs
);
6520 sect
->filepos
= note
->descpos
6521 + offsetof (lwpstatus_t
, pr_context
.uc_mcontext
.gregs
);
6524 #if defined (HAVE_LWPSTATUS_T_PR_REG)
6525 sect
->_raw_size
= sizeof (lwpstat
.pr_reg
);
6526 sect
->filepos
= note
->descpos
+ offsetof (lwpstatus_t
, pr_reg
);
6529 sect
->flags
= SEC_HAS_CONTENTS
;
6530 sect
->alignment_power
= 2;
6532 if (!elfcore_maybe_make_sect (abfd
, ".reg", sect
))
6535 /* Make a ".reg2/999" section */
6537 sprintf (buf
, ".reg2/%d", elfcore_make_pid (abfd
));
6538 len
= strlen (buf
) + 1;
6539 name
= bfd_alloc (abfd
, (bfd_size_type
) len
);
6542 memcpy (name
, buf
, len
);
6544 sect
= bfd_make_section (abfd
, name
);
6548 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
6549 sect
->_raw_size
= sizeof (lwpstat
.pr_context
.uc_mcontext
.fpregs
);
6550 sect
->filepos
= note
->descpos
6551 + offsetof (lwpstatus_t
, pr_context
.uc_mcontext
.fpregs
);
6554 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
6555 sect
->_raw_size
= sizeof (lwpstat
.pr_fpreg
);
6556 sect
->filepos
= note
->descpos
+ offsetof (lwpstatus_t
, pr_fpreg
);
6559 sect
->flags
= SEC_HAS_CONTENTS
;
6560 sect
->alignment_power
= 2;
6562 return elfcore_maybe_make_sect (abfd
, ".reg2", sect
);
6564 #endif /* defined (HAVE_LWPSTATUS_T) */
6566 #if defined (HAVE_WIN32_PSTATUS_T)
6568 elfcore_grok_win32pstatus (abfd
, note
)
6570 Elf_Internal_Note
*note
;
6576 win32_pstatus_t pstatus
;
6578 if (note
->descsz
< sizeof (pstatus
))
6581 memcpy (&pstatus
, note
->descdata
, sizeof (pstatus
));
6583 switch (pstatus
.data_type
)
6585 case NOTE_INFO_PROCESS
:
6586 /* FIXME: need to add ->core_command. */
6587 elf_tdata (abfd
)->core_signal
= pstatus
.data
.process_info
.signal
;
6588 elf_tdata (abfd
)->core_pid
= pstatus
.data
.process_info
.pid
;
6591 case NOTE_INFO_THREAD
:
6592 /* Make a ".reg/999" section. */
6593 sprintf (buf
, ".reg/%d", pstatus
.data
.thread_info
.tid
);
6595 len
= strlen (buf
) + 1;
6596 name
= bfd_alloc (abfd
, (bfd_size_type
) len
);
6600 memcpy (name
, buf
, len
);
6602 sect
= bfd_make_section (abfd
, name
);
6606 sect
->_raw_size
= sizeof (pstatus
.data
.thread_info
.thread_context
);
6607 sect
->filepos
= (note
->descpos
6608 + offsetof (struct win32_pstatus
,
6609 data
.thread_info
.thread_context
));
6610 sect
->flags
= SEC_HAS_CONTENTS
;
6611 sect
->alignment_power
= 2;
6613 if (pstatus
.data
.thread_info
.is_active_thread
)
6614 if (! elfcore_maybe_make_sect (abfd
, ".reg", sect
))
6618 case NOTE_INFO_MODULE
:
6619 /* Make a ".module/xxxxxxxx" section. */
6620 sprintf (buf
, ".module/%08x", pstatus
.data
.module_info
.base_address
);
6622 len
= strlen (buf
) + 1;
6623 name
= bfd_alloc (abfd
, (bfd_size_type
) len
);
6627 memcpy (name
, buf
, len
);
6629 sect
= bfd_make_section (abfd
, name
);
6634 sect
->_raw_size
= note
->descsz
;
6635 sect
->filepos
= note
->descpos
;
6636 sect
->flags
= SEC_HAS_CONTENTS
;
6637 sect
->alignment_power
= 2;
6646 #endif /* HAVE_WIN32_PSTATUS_T */
6649 elfcore_grok_note (abfd
, note
)
6651 Elf_Internal_Note
*note
;
6653 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
6661 if (bed
->elf_backend_grok_prstatus
)
6662 if ((*bed
->elf_backend_grok_prstatus
) (abfd
, note
))
6664 #if defined (HAVE_PRSTATUS_T)
6665 return elfcore_grok_prstatus (abfd
, note
);
6670 #if defined (HAVE_PSTATUS_T)
6672 return elfcore_grok_pstatus (abfd
, note
);
6675 #if defined (HAVE_LWPSTATUS_T)
6677 return elfcore_grok_lwpstatus (abfd
, note
);
6680 case NT_FPREGSET
: /* FIXME: rename to NT_PRFPREG */
6681 return elfcore_grok_prfpreg (abfd
, note
);
6683 #if defined (HAVE_WIN32_PSTATUS_T)
6684 case NT_WIN32PSTATUS
:
6685 return elfcore_grok_win32pstatus (abfd
, note
);
6688 case NT_PRXFPREG
: /* Linux SSE extension */
6689 if (note
->namesz
== 5
6690 && ! strcmp (note
->namedata
, "LINUX"))
6691 return elfcore_grok_prxfpreg (abfd
, note
);
6697 if (bed
->elf_backend_grok_psinfo
)
6698 if ((*bed
->elf_backend_grok_psinfo
) (abfd
, note
))
6700 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
6701 return elfcore_grok_psinfo (abfd
, note
);
6709 elfcore_netbsd_get_lwpid (note
, lwpidp
)
6710 Elf_Internal_Note
*note
;
6715 cp
= strchr (note
->namedata
, '@');
6718 *lwpidp
= atoi(cp
+ 1);
6725 elfcore_grok_netbsd_procinfo (abfd
, note
)
6727 Elf_Internal_Note
*note
;
6730 /* Signal number at offset 0x08. */
6731 elf_tdata (abfd
)->core_signal
6732 = bfd_h_get_32 (abfd
, (bfd_byte
*) note
->descdata
+ 0x08);
6734 /* Process ID at offset 0x50. */
6735 elf_tdata (abfd
)->core_pid
6736 = bfd_h_get_32 (abfd
, (bfd_byte
*) note
->descdata
+ 0x50);
6738 /* Command name at 0x7c (max 32 bytes, including nul). */
6739 elf_tdata (abfd
)->core_command
6740 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 0x7c, 31);
6746 elfcore_grok_netbsd_note (abfd
, note
)
6748 Elf_Internal_Note
*note
;
6752 if (elfcore_netbsd_get_lwpid (note
, &lwp
))
6753 elf_tdata (abfd
)->core_lwpid
= lwp
;
6755 if (note
->type
== NT_NETBSDCORE_PROCINFO
)
6757 /* NetBSD-specific core "procinfo". Note that we expect to
6758 find this note before any of the others, which is fine,
6759 since the kernel writes this note out first when it
6760 creates a core file. */
6762 return elfcore_grok_netbsd_procinfo (abfd
, note
);
6765 /* As of Jan 2002 there are no other machine-independent notes
6766 defined for NetBSD core files. If the note type is less
6767 than the start of the machine-dependent note types, we don't
6770 if (note
->type
< NT_NETBSDCORE_FIRSTMACH
)
6774 switch (bfd_get_arch (abfd
))
6776 /* On the Alpha, SPARC (32-bit and 64-bit), PT_GETREGS == mach+0 and
6777 PT_GETFPREGS == mach+2. */
6779 case bfd_arch_alpha
:
6780 case bfd_arch_sparc
:
6783 case NT_NETBSDCORE_FIRSTMACH
+0:
6784 return elfcore_make_note_pseudosection (abfd
, ".reg", note
);
6786 case NT_NETBSDCORE_FIRSTMACH
+2:
6787 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
6793 /* On all other arch's, PT_GETREGS == mach+1 and
6794 PT_GETFPREGS == mach+3. */
6799 case NT_NETBSDCORE_FIRSTMACH
+1:
6800 return elfcore_make_note_pseudosection (abfd
, ".reg", note
);
6802 case NT_NETBSDCORE_FIRSTMACH
+3:
6803 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
6812 /* Function: elfcore_write_note
6819 size of data for note
6822 End of buffer containing note. */
6825 elfcore_write_note (abfd
, buf
, bufsiz
, name
, type
, input
, size
)
6834 Elf_External_Note
*xnp
;
6844 struct elf_backend_data
*bed
;
6846 namesz
= strlen (name
) + 1;
6847 bed
= get_elf_backend_data (abfd
);
6848 pad
= -namesz
& (bed
->s
->file_align
- 1);
6851 newspace
= sizeof (Elf_External_Note
) - 1 + namesz
+ pad
+ size
;
6853 p
= realloc (buf
, *bufsiz
+ newspace
);
6855 *bufsiz
+= newspace
;
6856 xnp
= (Elf_External_Note
*) dest
;
6857 H_PUT_32 (abfd
, namesz
, xnp
->namesz
);
6858 H_PUT_32 (abfd
, size
, xnp
->descsz
);
6859 H_PUT_32 (abfd
, type
, xnp
->type
);
6863 memcpy (dest
, name
, namesz
);
6871 memcpy (dest
, input
, size
);
6875 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
6877 elfcore_write_prpsinfo (abfd
, buf
, bufsiz
, fname
, psargs
)
6885 char *note_name
= "CORE";
6887 #if defined (HAVE_PSINFO_T)
6889 note_type
= NT_PSINFO
;
6892 note_type
= NT_PRPSINFO
;
6895 memset (&data
, 0, sizeof (data
));
6896 strncpy (data
.pr_fname
, fname
, sizeof (data
.pr_fname
));
6897 strncpy (data
.pr_psargs
, psargs
, sizeof (data
.pr_psargs
));
6898 return elfcore_write_note (abfd
, buf
, bufsiz
,
6899 note_name
, note_type
, &data
, sizeof (data
));
6901 #endif /* PSINFO_T or PRPSINFO_T */
6903 #if defined (HAVE_PRSTATUS_T)
6905 elfcore_write_prstatus (abfd
, buf
, bufsiz
, pid
, cursig
, gregs
)
6914 char *note_name
= "CORE";
6916 memset (&prstat
, 0, sizeof (prstat
));
6917 prstat
.pr_pid
= pid
;
6918 prstat
.pr_cursig
= cursig
;
6919 memcpy (&prstat
.pr_reg
, gregs
, sizeof (prstat
.pr_reg
));
6920 return elfcore_write_note (abfd
, buf
, bufsiz
,
6921 note_name
, NT_PRSTATUS
, &prstat
, sizeof (prstat
));
6923 #endif /* HAVE_PRSTATUS_T */
6925 #if defined (HAVE_LWPSTATUS_T)
6927 elfcore_write_lwpstatus (abfd
, buf
, bufsiz
, pid
, cursig
, gregs
)
6935 lwpstatus_t lwpstat
;
6936 char *note_name
= "CORE";
6938 memset (&lwpstat
, 0, sizeof (lwpstat
));
6939 lwpstat
.pr_lwpid
= pid
>> 16;
6940 lwpstat
.pr_cursig
= cursig
;
6941 #if defined (HAVE_LWPSTATUS_T_PR_REG)
6942 memcpy (lwpstat
.pr_reg
, gregs
, sizeof (lwpstat
.pr_reg
));
6943 #elif defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
6945 memcpy (lwpstat
.pr_context
.uc_mcontext
.gregs
,
6946 gregs
, sizeof (lwpstat
.pr_context
.uc_mcontext
.gregs
));
6948 memcpy (lwpstat
.pr_context
.uc_mcontext
.__gregs
,
6949 gregs
, sizeof (lwpstat
.pr_context
.uc_mcontext
.__gregs
));
6952 return elfcore_write_note (abfd
, buf
, bufsiz
, note_name
,
6953 NT_LWPSTATUS
, &lwpstat
, sizeof (lwpstat
));
6955 #endif /* HAVE_LWPSTATUS_T */
6957 #if defined (HAVE_PSTATUS_T)
6959 elfcore_write_pstatus (abfd
, buf
, bufsiz
, pid
, cursig
, gregs
)
6968 char *note_name
= "CORE";
6970 memset (&pstat
, 0, sizeof (pstat
));
6971 pstat
.pr_pid
= pid
& 0xffff;
6972 buf
= elfcore_write_note (abfd
, buf
, bufsiz
, note_name
,
6973 NT_PSTATUS
, &pstat
, sizeof (pstat
));
6976 #endif /* HAVE_PSTATUS_T */
6979 elfcore_write_prfpreg (abfd
, buf
, bufsiz
, fpregs
, size
)
6986 char *note_name
= "CORE";
6987 return elfcore_write_note (abfd
, buf
, bufsiz
,
6988 note_name
, NT_FPREGSET
, fpregs
, size
);
6992 elfcore_write_prxfpreg (abfd
, buf
, bufsiz
, xfpregs
, size
)
6999 char *note_name
= "LINUX";
7000 return elfcore_write_note (abfd
, buf
, bufsiz
,
7001 note_name
, NT_PRXFPREG
, xfpregs
, size
);
7005 elfcore_read_notes (abfd
, offset
, size
)
7016 if (bfd_seek (abfd
, offset
, SEEK_SET
) != 0)
7019 buf
= bfd_malloc (size
);
7023 if (bfd_bread (buf
, size
, abfd
) != size
)
7031 while (p
< buf
+ size
)
7033 /* FIXME: bad alignment assumption. */
7034 Elf_External_Note
*xnp
= (Elf_External_Note
*) p
;
7035 Elf_Internal_Note in
;
7037 in
.type
= H_GET_32 (abfd
, xnp
->type
);
7039 in
.namesz
= H_GET_32 (abfd
, xnp
->namesz
);
7040 in
.namedata
= xnp
->name
;
7042 in
.descsz
= H_GET_32 (abfd
, xnp
->descsz
);
7043 in
.descdata
= in
.namedata
+ BFD_ALIGN (in
.namesz
, 4);
7044 in
.descpos
= offset
+ (in
.descdata
- buf
);
7046 if (strncmp (in
.namedata
, "NetBSD-CORE", 11) == 0)
7048 if (! elfcore_grok_netbsd_note (abfd
, &in
))
7053 if (! elfcore_grok_note (abfd
, &in
))
7057 p
= in
.descdata
+ BFD_ALIGN (in
.descsz
, 4);
7064 /* Providing external access to the ELF program header table. */
7066 /* Return an upper bound on the number of bytes required to store a
7067 copy of ABFD's program header table entries. Return -1 if an error
7068 occurs; bfd_get_error will return an appropriate code. */
7071 bfd_get_elf_phdr_upper_bound (abfd
)
7074 if (abfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
7076 bfd_set_error (bfd_error_wrong_format
);
7080 return elf_elfheader (abfd
)->e_phnum
* sizeof (Elf_Internal_Phdr
);
7083 /* Copy ABFD's program header table entries to *PHDRS. The entries
7084 will be stored as an array of Elf_Internal_Phdr structures, as
7085 defined in include/elf/internal.h. To find out how large the
7086 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
7088 Return the number of program header table entries read, or -1 if an
7089 error occurs; bfd_get_error will return an appropriate code. */
7092 bfd_get_elf_phdrs (abfd
, phdrs
)
7098 if (abfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
7100 bfd_set_error (bfd_error_wrong_format
);
7104 num_phdrs
= elf_elfheader (abfd
)->e_phnum
;
7105 memcpy (phdrs
, elf_tdata (abfd
)->phdr
,
7106 num_phdrs
* sizeof (Elf_Internal_Phdr
));
7112 _bfd_elf_sprintf_vma (abfd
, buf
, value
)
7113 bfd
*abfd ATTRIBUTE_UNUSED
;
7118 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
7120 i_ehdrp
= elf_elfheader (abfd
);
7121 if (i_ehdrp
== NULL
)
7122 sprintf_vma (buf
, value
);
7125 if (i_ehdrp
->e_ident
[EI_CLASS
] == ELFCLASS64
)
7127 #if BFD_HOST_64BIT_LONG
7128 sprintf (buf
, "%016lx", value
);
7130 sprintf (buf
, "%08lx%08lx", _bfd_int64_high (value
),
7131 _bfd_int64_low (value
));
7135 sprintf (buf
, "%08lx", (unsigned long) (value
& 0xffffffff));
7138 sprintf_vma (buf
, value
);
7143 _bfd_elf_fprintf_vma (abfd
, stream
, value
)
7144 bfd
*abfd ATTRIBUTE_UNUSED
;
7149 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
7151 i_ehdrp
= elf_elfheader (abfd
);
7152 if (i_ehdrp
== NULL
)
7153 fprintf_vma ((FILE *) stream
, value
);
7156 if (i_ehdrp
->e_ident
[EI_CLASS
] == ELFCLASS64
)
7158 #if BFD_HOST_64BIT_LONG
7159 fprintf ((FILE *) stream
, "%016lx", value
);
7161 fprintf ((FILE *) stream
, "%08lx%08lx",
7162 _bfd_int64_high (value
), _bfd_int64_low (value
));
7166 fprintf ((FILE *) stream
, "%08lx",
7167 (unsigned long) (value
& 0xffffffff));
7170 fprintf_vma ((FILE *) stream
, value
);
7174 enum elf_reloc_type_class
7175 _bfd_elf_reloc_type_class (rela
)
7176 const Elf_Internal_Rela
*rela ATTRIBUTE_UNUSED
;
7178 return reloc_class_normal
;
7181 /* For RELA architectures, return the relocation value for a
7182 relocation against a local symbol. */
7185 _bfd_elf_rela_local_sym (abfd
, sym
, sec
, rel
)
7187 Elf_Internal_Sym
*sym
;
7189 Elf_Internal_Rela
*rel
;
7193 relocation
= (sec
->output_section
->vma
7194 + sec
->output_offset
7196 if ((sec
->flags
& SEC_MERGE
)
7197 && ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
7198 && elf_section_data (sec
)->sec_info_type
== ELF_INFO_TYPE_MERGE
)
7204 _bfd_merged_section_offset (abfd
, &msec
,
7205 elf_section_data (sec
)->sec_info
,
7206 sym
->st_value
+ rel
->r_addend
,
7209 rel
->r_addend
+= msec
->output_section
->vma
+ msec
->output_offset
;
7215 _bfd_elf_rel_local_sym (abfd
, sym
, psec
, addend
)
7217 Elf_Internal_Sym
*sym
;
7221 asection
*sec
= *psec
;
7223 if (elf_section_data (sec
)->sec_info_type
!= ELF_INFO_TYPE_MERGE
)
7224 return sym
->st_value
+ addend
;
7226 return _bfd_merged_section_offset (abfd
, psec
,
7227 elf_section_data (sec
)->sec_info
,
7228 sym
->st_value
+ addend
, (bfd_vma
) 0);
7232 _bfd_elf_section_offset (abfd
, info
, sec
, offset
)
7234 struct bfd_link_info
*info
;
7238 struct bfd_elf_section_data
*sec_data
;
7240 sec_data
= elf_section_data (sec
);
7241 switch (sec_data
->sec_info_type
)
7243 case ELF_INFO_TYPE_STABS
:
7244 return _bfd_stab_section_offset
7245 (abfd
, &elf_hash_table (info
)->merge_info
, sec
, &sec_data
->sec_info
,
7247 case ELF_INFO_TYPE_EH_FRAME
:
7248 return _bfd_elf_eh_frame_section_offset (abfd
, sec
, offset
);