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
;
2076 split
= ((hdr
->p_memsz
> 0)
2077 && (hdr
->p_filesz
> 0)
2078 && (hdr
->p_memsz
> hdr
->p_filesz
));
2079 sprintf (namebuf
, "%s%d%s", typename
, index
, split
? "a" : "");
2080 name
= bfd_alloc (abfd
, (bfd_size_type
) strlen (namebuf
) + 1);
2083 strcpy (name
, namebuf
);
2084 newsect
= bfd_make_section (abfd
, name
);
2085 if (newsect
== NULL
)
2087 newsect
->vma
= hdr
->p_vaddr
;
2088 newsect
->lma
= hdr
->p_paddr
;
2089 newsect
->_raw_size
= hdr
->p_filesz
;
2090 newsect
->filepos
= hdr
->p_offset
;
2091 newsect
->flags
|= SEC_HAS_CONTENTS
;
2092 if (hdr
->p_type
== PT_LOAD
)
2094 newsect
->flags
|= SEC_ALLOC
;
2095 newsect
->flags
|= SEC_LOAD
;
2096 if (hdr
->p_flags
& PF_X
)
2098 /* FIXME: all we known is that it has execute PERMISSION,
2100 newsect
->flags
|= SEC_CODE
;
2103 if (!(hdr
->p_flags
& PF_W
))
2105 newsect
->flags
|= SEC_READONLY
;
2110 sprintf (namebuf
, "%s%db", typename
, index
);
2111 name
= bfd_alloc (abfd
, (bfd_size_type
) strlen (namebuf
) + 1);
2114 strcpy (name
, namebuf
);
2115 newsect
= bfd_make_section (abfd
, name
);
2116 if (newsect
== NULL
)
2118 newsect
->vma
= hdr
->p_vaddr
+ hdr
->p_filesz
;
2119 newsect
->lma
= hdr
->p_paddr
+ hdr
->p_filesz
;
2120 newsect
->_raw_size
= hdr
->p_memsz
- hdr
->p_filesz
;
2121 if (hdr
->p_type
== PT_LOAD
)
2123 newsect
->flags
|= SEC_ALLOC
;
2124 if (hdr
->p_flags
& PF_X
)
2125 newsect
->flags
|= SEC_CODE
;
2127 if (!(hdr
->p_flags
& PF_W
))
2128 newsect
->flags
|= SEC_READONLY
;
2135 bfd_section_from_phdr (abfd
, hdr
, index
)
2137 Elf_Internal_Phdr
*hdr
;
2140 struct elf_backend_data
*bed
;
2142 switch (hdr
->p_type
)
2145 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "null");
2148 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "load");
2151 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "dynamic");
2154 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "interp");
2157 if (! _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "note"))
2159 if (! elfcore_read_notes (abfd
, (file_ptr
) hdr
->p_offset
, hdr
->p_filesz
))
2164 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "shlib");
2167 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "phdr");
2170 /* Check for any processor-specific program segment types.
2171 If no handler for them, default to making "segment" sections. */
2172 bed
= get_elf_backend_data (abfd
);
2173 if (bed
->elf_backend_section_from_phdr
)
2174 return (*bed
->elf_backend_section_from_phdr
) (abfd
, hdr
, index
);
2176 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "segment");
2180 /* Initialize REL_HDR, the section-header for new section, containing
2181 relocations against ASECT. If USE_RELA_P is true, we use RELA
2182 relocations; otherwise, we use REL relocations. */
2185 _bfd_elf_init_reloc_shdr (abfd
, rel_hdr
, asect
, use_rela_p
)
2187 Elf_Internal_Shdr
*rel_hdr
;
2192 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2193 bfd_size_type amt
= sizeof ".rela" + strlen (asect
->name
);
2195 name
= bfd_alloc (abfd
, amt
);
2198 sprintf (name
, "%s%s", use_rela_p
? ".rela" : ".rel", asect
->name
);
2200 (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd
), name
,
2202 if (rel_hdr
->sh_name
== (unsigned int) -1)
2204 rel_hdr
->sh_type
= use_rela_p
? SHT_RELA
: SHT_REL
;
2205 rel_hdr
->sh_entsize
= (use_rela_p
2206 ? bed
->s
->sizeof_rela
2207 : bed
->s
->sizeof_rel
);
2208 rel_hdr
->sh_addralign
= bed
->s
->file_align
;
2209 rel_hdr
->sh_flags
= 0;
2210 rel_hdr
->sh_addr
= 0;
2211 rel_hdr
->sh_size
= 0;
2212 rel_hdr
->sh_offset
= 0;
2217 /* Set up an ELF internal section header for a section. */
2220 elf_fake_sections (abfd
, asect
, failedptrarg
)
2225 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2226 boolean
*failedptr
= (boolean
*) failedptrarg
;
2227 Elf_Internal_Shdr
*this_hdr
;
2231 /* We already failed; just get out of the bfd_map_over_sections
2236 this_hdr
= &elf_section_data (asect
)->this_hdr
;
2238 this_hdr
->sh_name
= (unsigned long) _bfd_elf_strtab_add (elf_shstrtab (abfd
),
2239 asect
->name
, false);
2240 if (this_hdr
->sh_name
== (unsigned long) -1)
2246 this_hdr
->sh_flags
= 0;
2248 if ((asect
->flags
& SEC_ALLOC
) != 0
2249 || asect
->user_set_vma
)
2250 this_hdr
->sh_addr
= asect
->vma
;
2252 this_hdr
->sh_addr
= 0;
2254 this_hdr
->sh_offset
= 0;
2255 this_hdr
->sh_size
= asect
->_raw_size
;
2256 this_hdr
->sh_link
= 0;
2257 this_hdr
->sh_addralign
= 1 << asect
->alignment_power
;
2258 /* The sh_entsize and sh_info fields may have been set already by
2259 copy_private_section_data. */
2261 this_hdr
->bfd_section
= asect
;
2262 this_hdr
->contents
= NULL
;
2264 /* FIXME: This should not be based on section names. */
2265 if (strcmp (asect
->name
, ".dynstr") == 0)
2266 this_hdr
->sh_type
= SHT_STRTAB
;
2267 else if (strcmp (asect
->name
, ".hash") == 0)
2269 this_hdr
->sh_type
= SHT_HASH
;
2270 this_hdr
->sh_entsize
= bed
->s
->sizeof_hash_entry
;
2272 else if (strcmp (asect
->name
, ".dynsym") == 0)
2274 this_hdr
->sh_type
= SHT_DYNSYM
;
2275 this_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
2277 else if (strcmp (asect
->name
, ".dynamic") == 0)
2279 this_hdr
->sh_type
= SHT_DYNAMIC
;
2280 this_hdr
->sh_entsize
= bed
->s
->sizeof_dyn
;
2282 else if (strncmp (asect
->name
, ".rela", 5) == 0
2283 && get_elf_backend_data (abfd
)->may_use_rela_p
)
2285 this_hdr
->sh_type
= SHT_RELA
;
2286 this_hdr
->sh_entsize
= bed
->s
->sizeof_rela
;
2288 else if (strncmp (asect
->name
, ".rel", 4) == 0
2289 && get_elf_backend_data (abfd
)->may_use_rel_p
)
2291 this_hdr
->sh_type
= SHT_REL
;
2292 this_hdr
->sh_entsize
= bed
->s
->sizeof_rel
;
2294 else if (strcmp (asect
->name
, ".init_array") == 0)
2295 this_hdr
->sh_type
= SHT_INIT_ARRAY
;
2296 else if (strcmp (asect
->name
, ".fini_array") == 0)
2297 this_hdr
->sh_type
= SHT_FINI_ARRAY
;
2298 else if (strcmp (asect
->name
, ".preinit_array") == 0)
2299 this_hdr
->sh_type
= SHT_PREINIT_ARRAY
;
2300 else if (strncmp (asect
->name
, ".note", 5) == 0)
2301 this_hdr
->sh_type
= SHT_NOTE
;
2302 else if (strncmp (asect
->name
, ".stab", 5) == 0
2303 && strcmp (asect
->name
+ strlen (asect
->name
) - 3, "str") == 0)
2304 this_hdr
->sh_type
= SHT_STRTAB
;
2305 else if (strcmp (asect
->name
, ".gnu.version") == 0)
2307 this_hdr
->sh_type
= SHT_GNU_versym
;
2308 this_hdr
->sh_entsize
= sizeof (Elf_External_Versym
);
2310 else if (strcmp (asect
->name
, ".gnu.version_d") == 0)
2312 this_hdr
->sh_type
= SHT_GNU_verdef
;
2313 this_hdr
->sh_entsize
= 0;
2314 /* objcopy or strip will copy over sh_info, but may not set
2315 cverdefs. The linker will set cverdefs, but sh_info will be
2317 if (this_hdr
->sh_info
== 0)
2318 this_hdr
->sh_info
= elf_tdata (abfd
)->cverdefs
;
2320 BFD_ASSERT (elf_tdata (abfd
)->cverdefs
== 0
2321 || this_hdr
->sh_info
== elf_tdata (abfd
)->cverdefs
);
2323 else if (strcmp (asect
->name
, ".gnu.version_r") == 0)
2325 this_hdr
->sh_type
= SHT_GNU_verneed
;
2326 this_hdr
->sh_entsize
= 0;
2327 /* objcopy or strip will copy over sh_info, but may not set
2328 cverrefs. The linker will set cverrefs, but sh_info will be
2330 if (this_hdr
->sh_info
== 0)
2331 this_hdr
->sh_info
= elf_tdata (abfd
)->cverrefs
;
2333 BFD_ASSERT (elf_tdata (abfd
)->cverrefs
== 0
2334 || this_hdr
->sh_info
== elf_tdata (abfd
)->cverrefs
);
2336 else if ((asect
->flags
& SEC_GROUP
) != 0)
2338 this_hdr
->sh_type
= SHT_GROUP
;
2339 this_hdr
->sh_entsize
= 4;
2341 else if ((asect
->flags
& SEC_ALLOC
) != 0
2342 && (((asect
->flags
& (SEC_LOAD
| SEC_HAS_CONTENTS
)) == 0)
2343 || (asect
->flags
& SEC_NEVER_LOAD
) != 0))
2344 this_hdr
->sh_type
= SHT_NOBITS
;
2346 this_hdr
->sh_type
= SHT_PROGBITS
;
2348 if ((asect
->flags
& SEC_ALLOC
) != 0)
2349 this_hdr
->sh_flags
|= SHF_ALLOC
;
2350 if ((asect
->flags
& SEC_READONLY
) == 0)
2351 this_hdr
->sh_flags
|= SHF_WRITE
;
2352 if ((asect
->flags
& SEC_CODE
) != 0)
2353 this_hdr
->sh_flags
|= SHF_EXECINSTR
;
2354 if ((asect
->flags
& SEC_MERGE
) != 0)
2356 this_hdr
->sh_flags
|= SHF_MERGE
;
2357 this_hdr
->sh_entsize
= asect
->entsize
;
2358 if ((asect
->flags
& SEC_STRINGS
) != 0)
2359 this_hdr
->sh_flags
|= SHF_STRINGS
;
2361 if ((asect
->flags
& SEC_GROUP
) == 0 && elf_group_name (asect
) != NULL
)
2362 this_hdr
->sh_flags
|= SHF_GROUP
;
2363 if ((asect
->flags
& SEC_THREAD_LOCAL
) != 0)
2364 this_hdr
->sh_flags
|= SHF_TLS
;
2366 /* Check for processor-specific section types. */
2367 if (bed
->elf_backend_fake_sections
2368 && !(*bed
->elf_backend_fake_sections
) (abfd
, this_hdr
, asect
))
2371 /* If the section has relocs, set up a section header for the
2372 SHT_REL[A] section. If two relocation sections are required for
2373 this section, it is up to the processor-specific back-end to
2374 create the other. */
2375 if ((asect
->flags
& SEC_RELOC
) != 0
2376 && !_bfd_elf_init_reloc_shdr (abfd
,
2377 &elf_section_data (asect
)->rel_hdr
,
2379 elf_section_data (asect
)->use_rela_p
))
2383 /* Fill in the contents of a SHT_GROUP section. */
2386 bfd_elf_set_group_contents (abfd
, sec
, failedptrarg
)
2391 boolean
*failedptr
= (boolean
*) failedptrarg
;
2392 unsigned long symindx
;
2393 asection
*elt
, *first
;
2395 struct bfd_link_order
*l
;
2398 if (elf_section_data (sec
)->this_hdr
.sh_type
!= SHT_GROUP
2403 if (elf_group_id (sec
) != NULL
)
2404 symindx
= elf_group_id (sec
)->udata
.i
;
2408 /* If called from the assembler, swap_out_syms will have set up
2409 elf_section_syms; If called for "ld -r", use target_index. */
2410 if (elf_section_syms (abfd
) != NULL
)
2411 symindx
= elf_section_syms (abfd
)[sec
->index
]->udata
.i
;
2413 symindx
= sec
->target_index
;
2415 elf_section_data (sec
)->this_hdr
.sh_info
= symindx
;
2417 /* The contents won't be allocated for "ld -r" or objcopy. */
2419 if (sec
->contents
== NULL
)
2422 sec
->contents
= bfd_alloc (abfd
, sec
->_raw_size
);
2424 /* Arrange for the section to be written out. */
2425 elf_section_data (sec
)->this_hdr
.contents
= sec
->contents
;
2426 if (sec
->contents
== NULL
)
2433 loc
= sec
->contents
+ sec
->_raw_size
;
2435 /* Get the pointer to the first section in the group that gas
2436 squirreled away here. objcopy arranges for this to be set to the
2437 start of the input section group. */
2438 first
= elt
= elf_next_in_group (sec
);
2440 /* First element is a flag word. Rest of section is elf section
2441 indices for all the sections of the group. Write them backwards
2442 just to keep the group in the same order as given in .section
2443 directives, not that it matters. */
2452 s
= s
->output_section
;
2455 idx
= elf_section_data (s
)->this_idx
;
2456 H_PUT_32 (abfd
, idx
, loc
);
2457 elt
= elf_next_in_group (elt
);
2462 /* If this is a relocatable link, then the above did nothing because
2463 SEC is the output section. Look through the input sections
2465 for (l
= sec
->link_order_head
; l
!= NULL
; l
= l
->next
)
2466 if (l
->type
== bfd_indirect_link_order
2467 && (elt
= elf_next_in_group (l
->u
.indirect
.section
)) != NULL
)
2472 elf_section_data (elt
->output_section
)->this_idx
, loc
);
2473 elt
= elf_next_in_group (elt
);
2474 /* During a relocatable link, the lists are circular. */
2476 while (elt
!= elf_next_in_group (l
->u
.indirect
.section
));
2478 /* With ld -r, merging SHT_GROUP sections results in wasted space
2479 due to allowing for the flag word on each input. We may well
2480 duplicate entries too. */
2481 while ((loc
-= 4) > sec
->contents
)
2482 H_PUT_32 (abfd
, 0, loc
);
2484 if (loc
!= sec
->contents
)
2487 H_PUT_32 (abfd
, sec
->flags
& SEC_LINK_ONCE
? GRP_COMDAT
: 0, loc
);
2490 /* Assign all ELF section numbers. The dummy first section is handled here
2491 too. The link/info pointers for the standard section types are filled
2492 in here too, while we're at it. */
2495 assign_section_numbers (abfd
)
2498 struct elf_obj_tdata
*t
= elf_tdata (abfd
);
2500 unsigned int section_number
, secn
;
2501 Elf_Internal_Shdr
**i_shdrp
;
2506 _bfd_elf_strtab_clear_all_refs (elf_shstrtab (abfd
));
2508 for (sec
= abfd
->sections
; sec
; sec
= sec
->next
)
2510 struct bfd_elf_section_data
*d
= elf_section_data (sec
);
2512 if (section_number
== SHN_LORESERVE
)
2513 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2514 d
->this_idx
= section_number
++;
2515 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->this_hdr
.sh_name
);
2516 if ((sec
->flags
& SEC_RELOC
) == 0)
2520 if (section_number
== SHN_LORESERVE
)
2521 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2522 d
->rel_idx
= section_number
++;
2523 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->rel_hdr
.sh_name
);
2528 if (section_number
== SHN_LORESERVE
)
2529 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2530 d
->rel_idx2
= section_number
++;
2531 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->rel_hdr2
->sh_name
);
2537 if (section_number
== SHN_LORESERVE
)
2538 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2539 t
->shstrtab_section
= section_number
++;
2540 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->shstrtab_hdr
.sh_name
);
2541 elf_elfheader (abfd
)->e_shstrndx
= t
->shstrtab_section
;
2543 if (bfd_get_symcount (abfd
) > 0)
2545 if (section_number
== SHN_LORESERVE
)
2546 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2547 t
->symtab_section
= section_number
++;
2548 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->symtab_hdr
.sh_name
);
2549 if (section_number
> SHN_LORESERVE
- 2)
2551 if (section_number
== SHN_LORESERVE
)
2552 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2553 t
->symtab_shndx_section
= section_number
++;
2554 t
->symtab_shndx_hdr
.sh_name
2555 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd
),
2556 ".symtab_shndx", false);
2557 if (t
->symtab_shndx_hdr
.sh_name
== (unsigned int) -1)
2560 if (section_number
== SHN_LORESERVE
)
2561 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2562 t
->strtab_section
= section_number
++;
2563 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->strtab_hdr
.sh_name
);
2566 _bfd_elf_strtab_finalize (elf_shstrtab (abfd
));
2567 t
->shstrtab_hdr
.sh_size
= _bfd_elf_strtab_size (elf_shstrtab (abfd
));
2569 elf_numsections (abfd
) = section_number
;
2570 elf_elfheader (abfd
)->e_shnum
= section_number
;
2571 if (section_number
> SHN_LORESERVE
)
2572 elf_elfheader (abfd
)->e_shnum
-= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2574 /* Set up the list of section header pointers, in agreement with the
2576 amt
= section_number
* sizeof (Elf_Internal_Shdr
*);
2577 i_shdrp
= (Elf_Internal_Shdr
**) bfd_alloc (abfd
, amt
);
2578 if (i_shdrp
== NULL
)
2581 amt
= sizeof (Elf_Internal_Shdr
);
2582 i_shdrp
[0] = (Elf_Internal_Shdr
*) bfd_alloc (abfd
, amt
);
2583 if (i_shdrp
[0] == NULL
)
2585 bfd_release (abfd
, i_shdrp
);
2588 memset (i_shdrp
[0], 0, sizeof (Elf_Internal_Shdr
));
2590 elf_elfsections (abfd
) = i_shdrp
;
2592 i_shdrp
[t
->shstrtab_section
] = &t
->shstrtab_hdr
;
2593 if (bfd_get_symcount (abfd
) > 0)
2595 i_shdrp
[t
->symtab_section
] = &t
->symtab_hdr
;
2596 if (elf_numsections (abfd
) > SHN_LORESERVE
)
2598 i_shdrp
[t
->symtab_shndx_section
] = &t
->symtab_shndx_hdr
;
2599 t
->symtab_shndx_hdr
.sh_link
= t
->symtab_section
;
2601 i_shdrp
[t
->strtab_section
] = &t
->strtab_hdr
;
2602 t
->symtab_hdr
.sh_link
= t
->strtab_section
;
2604 for (sec
= abfd
->sections
; sec
; sec
= sec
->next
)
2606 struct bfd_elf_section_data
*d
= elf_section_data (sec
);
2610 i_shdrp
[d
->this_idx
] = &d
->this_hdr
;
2611 if (d
->rel_idx
!= 0)
2612 i_shdrp
[d
->rel_idx
] = &d
->rel_hdr
;
2613 if (d
->rel_idx2
!= 0)
2614 i_shdrp
[d
->rel_idx2
] = d
->rel_hdr2
;
2616 /* Fill in the sh_link and sh_info fields while we're at it. */
2618 /* sh_link of a reloc section is the section index of the symbol
2619 table. sh_info is the section index of the section to which
2620 the relocation entries apply. */
2621 if (d
->rel_idx
!= 0)
2623 d
->rel_hdr
.sh_link
= t
->symtab_section
;
2624 d
->rel_hdr
.sh_info
= d
->this_idx
;
2626 if (d
->rel_idx2
!= 0)
2628 d
->rel_hdr2
->sh_link
= t
->symtab_section
;
2629 d
->rel_hdr2
->sh_info
= d
->this_idx
;
2632 switch (d
->this_hdr
.sh_type
)
2636 /* A reloc section which we are treating as a normal BFD
2637 section. sh_link is the section index of the symbol
2638 table. sh_info is the section index of the section to
2639 which the relocation entries apply. We assume that an
2640 allocated reloc section uses the dynamic symbol table.
2641 FIXME: How can we be sure? */
2642 s
= bfd_get_section_by_name (abfd
, ".dynsym");
2644 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
2646 /* We look up the section the relocs apply to by name. */
2648 if (d
->this_hdr
.sh_type
== SHT_REL
)
2652 s
= bfd_get_section_by_name (abfd
, name
);
2654 d
->this_hdr
.sh_info
= elf_section_data (s
)->this_idx
;
2658 /* We assume that a section named .stab*str is a stabs
2659 string section. We look for a section with the same name
2660 but without the trailing ``str'', and set its sh_link
2661 field to point to this section. */
2662 if (strncmp (sec
->name
, ".stab", sizeof ".stab" - 1) == 0
2663 && strcmp (sec
->name
+ strlen (sec
->name
) - 3, "str") == 0)
2668 len
= strlen (sec
->name
);
2669 alc
= (char *) bfd_malloc ((bfd_size_type
) len
- 2);
2672 strncpy (alc
, sec
->name
, len
- 3);
2673 alc
[len
- 3] = '\0';
2674 s
= bfd_get_section_by_name (abfd
, alc
);
2678 elf_section_data (s
)->this_hdr
.sh_link
= d
->this_idx
;
2680 /* This is a .stab section. */
2681 elf_section_data (s
)->this_hdr
.sh_entsize
=
2682 4 + 2 * bfd_get_arch_size (abfd
) / 8;
2689 case SHT_GNU_verneed
:
2690 case SHT_GNU_verdef
:
2691 /* sh_link is the section header index of the string table
2692 used for the dynamic entries, or the symbol table, or the
2694 s
= bfd_get_section_by_name (abfd
, ".dynstr");
2696 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
2700 case SHT_GNU_versym
:
2701 /* sh_link is the section header index of the symbol table
2702 this hash table or version table is for. */
2703 s
= bfd_get_section_by_name (abfd
, ".dynsym");
2705 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
2709 d
->this_hdr
.sh_link
= t
->symtab_section
;
2713 for (secn
= 1; secn
< section_number
; ++secn
)
2714 if (i_shdrp
[secn
] == NULL
)
2715 i_shdrp
[secn
] = i_shdrp
[0];
2717 i_shdrp
[secn
]->sh_name
= _bfd_elf_strtab_offset (elf_shstrtab (abfd
),
2718 i_shdrp
[secn
]->sh_name
);
2722 /* Map symbol from it's internal number to the external number, moving
2723 all local symbols to be at the head of the list. */
2726 sym_is_global (abfd
, sym
)
2730 /* If the backend has a special mapping, use it. */
2731 if (get_elf_backend_data (abfd
)->elf_backend_sym_is_global
)
2732 return ((*get_elf_backend_data (abfd
)->elf_backend_sym_is_global
)
2735 return ((sym
->flags
& (BSF_GLOBAL
| BSF_WEAK
)) != 0
2736 || bfd_is_und_section (bfd_get_section (sym
))
2737 || bfd_is_com_section (bfd_get_section (sym
)));
2741 elf_map_symbols (abfd
)
2744 unsigned int symcount
= bfd_get_symcount (abfd
);
2745 asymbol
**syms
= bfd_get_outsymbols (abfd
);
2746 asymbol
**sect_syms
;
2747 unsigned int num_locals
= 0;
2748 unsigned int num_globals
= 0;
2749 unsigned int num_locals2
= 0;
2750 unsigned int num_globals2
= 0;
2758 fprintf (stderr
, "elf_map_symbols\n");
2762 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
2764 if (max_index
< asect
->index
)
2765 max_index
= asect
->index
;
2769 amt
= max_index
* sizeof (asymbol
*);
2770 sect_syms
= (asymbol
**) bfd_zalloc (abfd
, amt
);
2771 if (sect_syms
== NULL
)
2773 elf_section_syms (abfd
) = sect_syms
;
2774 elf_num_section_syms (abfd
) = max_index
;
2776 /* Init sect_syms entries for any section symbols we have already
2777 decided to output. */
2778 for (idx
= 0; idx
< symcount
; idx
++)
2780 asymbol
*sym
= syms
[idx
];
2782 if ((sym
->flags
& BSF_SECTION_SYM
) != 0
2789 if (sec
->owner
!= NULL
)
2791 if (sec
->owner
!= abfd
)
2793 if (sec
->output_offset
!= 0)
2796 sec
= sec
->output_section
;
2798 /* Empty sections in the input files may have had a
2799 section symbol created for them. (See the comment
2800 near the end of _bfd_generic_link_output_symbols in
2801 linker.c). If the linker script discards such
2802 sections then we will reach this point. Since we know
2803 that we cannot avoid this case, we detect it and skip
2804 the abort and the assignment to the sect_syms array.
2805 To reproduce this particular case try running the
2806 linker testsuite test ld-scripts/weak.exp for an ELF
2807 port that uses the generic linker. */
2808 if (sec
->owner
== NULL
)
2811 BFD_ASSERT (sec
->owner
== abfd
);
2813 sect_syms
[sec
->index
] = syms
[idx
];
2818 /* Classify all of the symbols. */
2819 for (idx
= 0; idx
< symcount
; idx
++)
2821 if (!sym_is_global (abfd
, syms
[idx
]))
2827 /* We will be adding a section symbol for each BFD section. Most normal
2828 sections will already have a section symbol in outsymbols, but
2829 eg. SHT_GROUP sections will not, and we need the section symbol mapped
2830 at least in that case. */
2831 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
2833 if (sect_syms
[asect
->index
] == NULL
)
2835 if (!sym_is_global (abfd
, asect
->symbol
))
2842 /* Now sort the symbols so the local symbols are first. */
2843 amt
= (num_locals
+ num_globals
) * sizeof (asymbol
*);
2844 new_syms
= (asymbol
**) bfd_alloc (abfd
, amt
);
2846 if (new_syms
== NULL
)
2849 for (idx
= 0; idx
< symcount
; idx
++)
2851 asymbol
*sym
= syms
[idx
];
2854 if (!sym_is_global (abfd
, sym
))
2857 i
= num_locals
+ num_globals2
++;
2859 sym
->udata
.i
= i
+ 1;
2861 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
2863 if (sect_syms
[asect
->index
] == NULL
)
2865 asymbol
*sym
= asect
->symbol
;
2868 sect_syms
[asect
->index
] = sym
;
2869 if (!sym_is_global (abfd
, sym
))
2872 i
= num_locals
+ num_globals2
++;
2874 sym
->udata
.i
= i
+ 1;
2878 bfd_set_symtab (abfd
, new_syms
, num_locals
+ num_globals
);
2880 elf_num_locals (abfd
) = num_locals
;
2881 elf_num_globals (abfd
) = num_globals
;
2885 /* Align to the maximum file alignment that could be required for any
2886 ELF data structure. */
2888 static INLINE file_ptr align_file_position
PARAMS ((file_ptr
, int));
2889 static INLINE file_ptr
2890 align_file_position (off
, align
)
2894 return (off
+ align
- 1) & ~(align
- 1);
2897 /* Assign a file position to a section, optionally aligning to the
2898 required section alignment. */
2901 _bfd_elf_assign_file_position_for_section (i_shdrp
, offset
, align
)
2902 Elf_Internal_Shdr
*i_shdrp
;
2910 al
= i_shdrp
->sh_addralign
;
2912 offset
= BFD_ALIGN (offset
, al
);
2914 i_shdrp
->sh_offset
= offset
;
2915 if (i_shdrp
->bfd_section
!= NULL
)
2916 i_shdrp
->bfd_section
->filepos
= offset
;
2917 if (i_shdrp
->sh_type
!= SHT_NOBITS
)
2918 offset
+= i_shdrp
->sh_size
;
2922 /* Compute the file positions we are going to put the sections at, and
2923 otherwise prepare to begin writing out the ELF file. If LINK_INFO
2924 is not NULL, this is being called by the ELF backend linker. */
2927 _bfd_elf_compute_section_file_positions (abfd
, link_info
)
2929 struct bfd_link_info
*link_info
;
2931 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2933 struct bfd_strtab_hash
*strtab
;
2934 Elf_Internal_Shdr
*shstrtab_hdr
;
2936 if (abfd
->output_has_begun
)
2939 /* Do any elf backend specific processing first. */
2940 if (bed
->elf_backend_begin_write_processing
)
2941 (*bed
->elf_backend_begin_write_processing
) (abfd
, link_info
);
2943 if (! prep_headers (abfd
))
2946 /* Post process the headers if necessary. */
2947 if (bed
->elf_backend_post_process_headers
)
2948 (*bed
->elf_backend_post_process_headers
) (abfd
, link_info
);
2951 bfd_map_over_sections (abfd
, elf_fake_sections
, &failed
);
2955 if (!assign_section_numbers (abfd
))
2958 /* The backend linker builds symbol table information itself. */
2959 if (link_info
== NULL
&& bfd_get_symcount (abfd
) > 0)
2961 /* Non-zero if doing a relocatable link. */
2962 int relocatable_p
= ! (abfd
->flags
& (EXEC_P
| DYNAMIC
));
2964 if (! swap_out_syms (abfd
, &strtab
, relocatable_p
))
2968 if (link_info
== NULL
)
2970 bfd_map_over_sections (abfd
, bfd_elf_set_group_contents
, &failed
);
2975 shstrtab_hdr
= &elf_tdata (abfd
)->shstrtab_hdr
;
2976 /* sh_name was set in prep_headers. */
2977 shstrtab_hdr
->sh_type
= SHT_STRTAB
;
2978 shstrtab_hdr
->sh_flags
= 0;
2979 shstrtab_hdr
->sh_addr
= 0;
2980 shstrtab_hdr
->sh_size
= _bfd_elf_strtab_size (elf_shstrtab (abfd
));
2981 shstrtab_hdr
->sh_entsize
= 0;
2982 shstrtab_hdr
->sh_link
= 0;
2983 shstrtab_hdr
->sh_info
= 0;
2984 /* sh_offset is set in assign_file_positions_except_relocs. */
2985 shstrtab_hdr
->sh_addralign
= 1;
2987 if (!assign_file_positions_except_relocs (abfd
))
2990 if (link_info
== NULL
&& bfd_get_symcount (abfd
) > 0)
2993 Elf_Internal_Shdr
*hdr
;
2995 off
= elf_tdata (abfd
)->next_file_pos
;
2997 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2998 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, true);
3000 hdr
= &elf_tdata (abfd
)->symtab_shndx_hdr
;
3001 if (hdr
->sh_size
!= 0)
3002 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, true);
3004 hdr
= &elf_tdata (abfd
)->strtab_hdr
;
3005 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, true);
3007 elf_tdata (abfd
)->next_file_pos
= off
;
3009 /* Now that we know where the .strtab section goes, write it
3011 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
3012 || ! _bfd_stringtab_emit (abfd
, strtab
))
3014 _bfd_stringtab_free (strtab
);
3017 abfd
->output_has_begun
= true;
3022 /* Create a mapping from a set of sections to a program segment. */
3024 static INLINE
struct elf_segment_map
*
3025 make_mapping (abfd
, sections
, from
, to
, phdr
)
3027 asection
**sections
;
3032 struct elf_segment_map
*m
;
3037 amt
= sizeof (struct elf_segment_map
);
3038 amt
+= (to
- from
- 1) * sizeof (asection
*);
3039 m
= (struct elf_segment_map
*) bfd_zalloc (abfd
, amt
);
3043 m
->p_type
= PT_LOAD
;
3044 for (i
= from
, hdrpp
= sections
+ from
; i
< to
; i
++, hdrpp
++)
3045 m
->sections
[i
- from
] = *hdrpp
;
3046 m
->count
= to
- from
;
3048 if (from
== 0 && phdr
)
3050 /* Include the headers in the first PT_LOAD segment. */
3051 m
->includes_filehdr
= 1;
3052 m
->includes_phdrs
= 1;
3058 /* Set up a mapping from BFD sections to program segments. */
3061 map_sections_to_segments (abfd
)
3064 asection
**sections
= NULL
;
3068 struct elf_segment_map
*mfirst
;
3069 struct elf_segment_map
**pm
;
3070 struct elf_segment_map
*m
;
3072 unsigned int phdr_index
;
3073 bfd_vma maxpagesize
;
3075 boolean phdr_in_segment
= true;
3078 asection
*first_tls
= NULL
;
3079 asection
*dynsec
, *eh_frame_hdr
;
3082 if (elf_tdata (abfd
)->segment_map
!= NULL
)
3085 if (bfd_count_sections (abfd
) == 0)
3088 /* Select the allocated sections, and sort them. */
3090 amt
= bfd_count_sections (abfd
) * sizeof (asection
*);
3091 sections
= (asection
**) bfd_malloc (amt
);
3092 if (sections
== NULL
)
3096 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
3098 if ((s
->flags
& SEC_ALLOC
) != 0)
3104 BFD_ASSERT (i
<= bfd_count_sections (abfd
));
3107 qsort (sections
, (size_t) count
, sizeof (asection
*), elf_sort_sections
);
3109 /* Build the mapping. */
3114 /* If we have a .interp section, then create a PT_PHDR segment for
3115 the program headers and a PT_INTERP segment for the .interp
3117 s
= bfd_get_section_by_name (abfd
, ".interp");
3118 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0)
3120 amt
= sizeof (struct elf_segment_map
);
3121 m
= (struct elf_segment_map
*) bfd_zalloc (abfd
, amt
);
3125 m
->p_type
= PT_PHDR
;
3126 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
3127 m
->p_flags
= PF_R
| PF_X
;
3128 m
->p_flags_valid
= 1;
3129 m
->includes_phdrs
= 1;
3134 amt
= sizeof (struct elf_segment_map
);
3135 m
= (struct elf_segment_map
*) bfd_zalloc (abfd
, amt
);
3139 m
->p_type
= PT_INTERP
;
3147 /* Look through the sections. We put sections in the same program
3148 segment when the start of the second section can be placed within
3149 a few bytes of the end of the first section. */
3152 maxpagesize
= get_elf_backend_data (abfd
)->maxpagesize
;
3154 dynsec
= bfd_get_section_by_name (abfd
, ".dynamic");
3156 && (dynsec
->flags
& SEC_LOAD
) == 0)
3159 /* Deal with -Ttext or something similar such that the first section
3160 is not adjacent to the program headers. This is an
3161 approximation, since at this point we don't know exactly how many
3162 program headers we will need. */
3165 bfd_size_type phdr_size
;
3167 phdr_size
= elf_tdata (abfd
)->program_header_size
;
3169 phdr_size
= get_elf_backend_data (abfd
)->s
->sizeof_phdr
;
3170 if ((abfd
->flags
& D_PAGED
) == 0
3171 || sections
[0]->lma
< phdr_size
3172 || sections
[0]->lma
% maxpagesize
< phdr_size
% maxpagesize
)
3173 phdr_in_segment
= false;
3176 for (i
= 0, hdrpp
= sections
; i
< count
; i
++, hdrpp
++)
3179 boolean new_segment
;
3183 /* See if this section and the last one will fit in the same
3186 if (last_hdr
== NULL
)
3188 /* If we don't have a segment yet, then we don't need a new
3189 one (we build the last one after this loop). */
3190 new_segment
= false;
3192 else if (last_hdr
->lma
- last_hdr
->vma
!= hdr
->lma
- hdr
->vma
)
3194 /* If this section has a different relation between the
3195 virtual address and the load address, then we need a new
3199 else if (BFD_ALIGN (last_hdr
->lma
+ last_hdr
->_raw_size
, maxpagesize
)
3200 < BFD_ALIGN (hdr
->lma
, maxpagesize
))
3202 /* If putting this section in this segment would force us to
3203 skip a page in the segment, then we need a new segment. */
3206 else if ((last_hdr
->flags
& SEC_LOAD
) == 0
3207 && (hdr
->flags
& SEC_LOAD
) != 0)
3209 /* We don't want to put a loadable section after a
3210 nonloadable section in the same segment. */
3213 else if ((abfd
->flags
& D_PAGED
) == 0)
3215 /* If the file is not demand paged, which means that we
3216 don't require the sections to be correctly aligned in the
3217 file, then there is no other reason for a new segment. */
3218 new_segment
= false;
3221 && (hdr
->flags
& SEC_READONLY
) == 0
3222 && (BFD_ALIGN (last_hdr
->lma
+ last_hdr
->_raw_size
, maxpagesize
)
3225 /* We don't want to put a writable section in a read only
3226 segment, unless they are on the same page in memory
3227 anyhow. We already know that the last section does not
3228 bring us past the current section on the page, so the
3229 only case in which the new section is not on the same
3230 page as the previous section is when the previous section
3231 ends precisely on a page boundary. */
3236 /* Otherwise, we can use the same segment. */
3237 new_segment
= false;
3242 if ((hdr
->flags
& SEC_READONLY
) == 0)
3248 /* We need a new program segment. We must create a new program
3249 header holding all the sections from phdr_index until hdr. */
3251 m
= make_mapping (abfd
, sections
, phdr_index
, i
, phdr_in_segment
);
3258 if ((hdr
->flags
& SEC_READONLY
) == 0)
3265 phdr_in_segment
= false;
3268 /* Create a final PT_LOAD program segment. */
3269 if (last_hdr
!= NULL
)
3271 m
= make_mapping (abfd
, sections
, phdr_index
, i
, phdr_in_segment
);
3279 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
3282 amt
= sizeof (struct elf_segment_map
);
3283 m
= (struct elf_segment_map
*) bfd_zalloc (abfd
, amt
);
3287 m
->p_type
= PT_DYNAMIC
;
3289 m
->sections
[0] = dynsec
;
3295 /* For each loadable .note section, add a PT_NOTE segment. We don't
3296 use bfd_get_section_by_name, because if we link together
3297 nonloadable .note sections and loadable .note sections, we will
3298 generate two .note sections in the output file. FIXME: Using
3299 names for section types is bogus anyhow. */
3300 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
3302 if ((s
->flags
& SEC_LOAD
) != 0
3303 && strncmp (s
->name
, ".note", 5) == 0)
3305 amt
= sizeof (struct elf_segment_map
);
3306 m
= (struct elf_segment_map
*) bfd_zalloc (abfd
, amt
);
3310 m
->p_type
= PT_NOTE
;
3317 if (s
->flags
& SEC_THREAD_LOCAL
)
3325 /* If there are any SHF_TLS output sections, add PT_TLS segment. */
3330 amt
= sizeof (struct elf_segment_map
);
3331 amt
+= (tls_count
- 1) * sizeof (asection
*);
3332 m
= (struct elf_segment_map
*) bfd_zalloc (abfd
, amt
);
3337 m
->count
= tls_count
;
3338 /* Mandated PF_R. */
3340 m
->p_flags_valid
= 1;
3341 for (i
= 0; i
< tls_count
; ++i
)
3343 BFD_ASSERT (first_tls
->flags
& SEC_THREAD_LOCAL
);
3344 m
->sections
[i
] = first_tls
;
3345 first_tls
= first_tls
->next
;
3352 /* If there is a .eh_frame_hdr section, throw in a PT_GNU_EH_FRAME
3354 eh_frame_hdr
= NULL
;
3355 if (elf_tdata (abfd
)->eh_frame_hdr
)
3356 eh_frame_hdr
= bfd_get_section_by_name (abfd
, ".eh_frame_hdr");
3357 if (eh_frame_hdr
!= NULL
&& (eh_frame_hdr
->flags
& SEC_LOAD
))
3359 amt
= sizeof (struct elf_segment_map
);
3360 m
= (struct elf_segment_map
*) bfd_zalloc (abfd
, amt
);
3364 m
->p_type
= PT_GNU_EH_FRAME
;
3366 m
->sections
[0] = eh_frame_hdr
;
3375 elf_tdata (abfd
)->segment_map
= mfirst
;
3379 if (sections
!= NULL
)
3384 /* Sort sections by address. */
3387 elf_sort_sections (arg1
, arg2
)
3391 const asection
*sec1
= *(const asection
**) arg1
;
3392 const asection
*sec2
= *(const asection
**) arg2
;
3394 /* Sort by LMA first, since this is the address used to
3395 place the section into a segment. */
3396 if (sec1
->lma
< sec2
->lma
)
3398 else if (sec1
->lma
> sec2
->lma
)
3401 /* Then sort by VMA. Normally the LMA and the VMA will be
3402 the same, and this will do nothing. */
3403 if (sec1
->vma
< sec2
->vma
)
3405 else if (sec1
->vma
> sec2
->vma
)
3408 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
3410 #define TOEND(x) (((x)->flags & SEC_LOAD) == 0)
3416 /* If the indicies are the same, do not return 0
3417 here, but continue to try the next comparison. */
3418 if (sec1
->target_index
- sec2
->target_index
!= 0)
3419 return sec1
->target_index
- sec2
->target_index
;
3424 else if (TOEND (sec2
))
3429 /* Sort by size, to put zero sized sections
3430 before others at the same address. */
3432 if (sec1
->_raw_size
< sec2
->_raw_size
)
3434 if (sec1
->_raw_size
> sec2
->_raw_size
)
3437 return sec1
->target_index
- sec2
->target_index
;
3440 /* Assign file positions to the sections based on the mapping from
3441 sections to segments. This function also sets up some fields in
3442 the file header, and writes out the program headers. */
3445 assign_file_positions_for_segments (abfd
)
3448 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3450 struct elf_segment_map
*m
;
3452 Elf_Internal_Phdr
*phdrs
;
3454 bfd_vma filehdr_vaddr
, filehdr_paddr
;
3455 bfd_vma phdrs_vaddr
, phdrs_paddr
;
3456 Elf_Internal_Phdr
*p
;
3459 if (elf_tdata (abfd
)->segment_map
== NULL
)
3461 if (! map_sections_to_segments (abfd
))
3466 /* The placement algorithm assumes that non allocated sections are
3467 not in PT_LOAD segments. We ensure this here by removing such
3468 sections from the segment map. */
3469 for (m
= elf_tdata (abfd
)->segment_map
;
3473 unsigned int new_count
;
3476 if (m
->p_type
!= PT_LOAD
)
3480 for (i
= 0; i
< m
->count
; i
++)
3482 if ((m
->sections
[i
]->flags
& SEC_ALLOC
) != 0)
3485 m
->sections
[new_count
] = m
->sections
[i
];
3491 if (new_count
!= m
->count
)
3492 m
->count
= new_count
;
3496 if (bed
->elf_backend_modify_segment_map
)
3498 if (! (*bed
->elf_backend_modify_segment_map
) (abfd
))
3503 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
3506 elf_elfheader (abfd
)->e_phoff
= bed
->s
->sizeof_ehdr
;
3507 elf_elfheader (abfd
)->e_phentsize
= bed
->s
->sizeof_phdr
;
3508 elf_elfheader (abfd
)->e_phnum
= count
;
3513 /* If we already counted the number of program segments, make sure
3514 that we allocated enough space. This happens when SIZEOF_HEADERS
3515 is used in a linker script. */
3516 alloc
= elf_tdata (abfd
)->program_header_size
/ bed
->s
->sizeof_phdr
;
3517 if (alloc
!= 0 && count
> alloc
)
3519 ((*_bfd_error_handler
)
3520 (_("%s: Not enough room for program headers (allocated %u, need %u)"),
3521 bfd_get_filename (abfd
), alloc
, count
));
3522 bfd_set_error (bfd_error_bad_value
);
3529 amt
= alloc
* sizeof (Elf_Internal_Phdr
);
3530 phdrs
= (Elf_Internal_Phdr
*) bfd_alloc (abfd
, amt
);
3534 off
= bed
->s
->sizeof_ehdr
;
3535 off
+= alloc
* bed
->s
->sizeof_phdr
;
3542 for (m
= elf_tdata (abfd
)->segment_map
, p
= phdrs
;
3549 /* If elf_segment_map is not from map_sections_to_segments, the
3550 sections may not be correctly ordered. NOTE: sorting should
3551 not be done to the PT_NOTE section of a corefile, which may
3552 contain several pseudo-sections artificially created by bfd.
3553 Sorting these pseudo-sections breaks things badly. */
3555 && !(elf_elfheader (abfd
)->e_type
== ET_CORE
3556 && m
->p_type
== PT_NOTE
))
3557 qsort (m
->sections
, (size_t) m
->count
, sizeof (asection
*),
3560 p
->p_type
= m
->p_type
;
3561 p
->p_flags
= m
->p_flags
;
3563 if (p
->p_type
== PT_LOAD
3565 && (m
->sections
[0]->flags
& SEC_ALLOC
) != 0)
3567 if ((abfd
->flags
& D_PAGED
) != 0)
3568 off
+= (m
->sections
[0]->vma
- off
) % bed
->maxpagesize
;
3571 bfd_size_type align
;
3574 for (i
= 0, secpp
= m
->sections
; i
< m
->count
; i
++, secpp
++)
3576 bfd_size_type secalign
;
3578 secalign
= bfd_get_section_alignment (abfd
, *secpp
);
3579 if (secalign
> align
)
3583 off
+= (m
->sections
[0]->vma
- off
) % (1 << align
);
3590 p
->p_vaddr
= m
->sections
[0]->vma
;
3592 if (m
->p_paddr_valid
)
3593 p
->p_paddr
= m
->p_paddr
;
3594 else if (m
->count
== 0)
3597 p
->p_paddr
= m
->sections
[0]->lma
;
3599 if (p
->p_type
== PT_LOAD
3600 && (abfd
->flags
& D_PAGED
) != 0)
3601 p
->p_align
= bed
->maxpagesize
;
3602 else if (m
->count
== 0)
3603 p
->p_align
= bed
->s
->file_align
;
3611 if (m
->includes_filehdr
)
3613 if (! m
->p_flags_valid
)
3616 p
->p_filesz
= bed
->s
->sizeof_ehdr
;
3617 p
->p_memsz
= bed
->s
->sizeof_ehdr
;
3620 BFD_ASSERT (p
->p_type
== PT_LOAD
);
3622 if (p
->p_vaddr
< (bfd_vma
) off
)
3624 (*_bfd_error_handler
)
3625 (_("%s: Not enough room for program headers, try linking with -N"),
3626 bfd_get_filename (abfd
));
3627 bfd_set_error (bfd_error_bad_value
);
3632 if (! m
->p_paddr_valid
)
3635 if (p
->p_type
== PT_LOAD
)
3637 filehdr_vaddr
= p
->p_vaddr
;
3638 filehdr_paddr
= p
->p_paddr
;
3642 if (m
->includes_phdrs
)
3644 if (! m
->p_flags_valid
)
3647 if (m
->includes_filehdr
)
3649 if (p
->p_type
== PT_LOAD
)
3651 phdrs_vaddr
= p
->p_vaddr
+ bed
->s
->sizeof_ehdr
;
3652 phdrs_paddr
= p
->p_paddr
+ bed
->s
->sizeof_ehdr
;
3657 p
->p_offset
= bed
->s
->sizeof_ehdr
;
3661 BFD_ASSERT (p
->p_type
== PT_LOAD
);
3662 p
->p_vaddr
-= off
- p
->p_offset
;
3663 if (! m
->p_paddr_valid
)
3664 p
->p_paddr
-= off
- p
->p_offset
;
3667 if (p
->p_type
== PT_LOAD
)
3669 phdrs_vaddr
= p
->p_vaddr
;
3670 phdrs_paddr
= p
->p_paddr
;
3673 phdrs_vaddr
= bed
->maxpagesize
+ bed
->s
->sizeof_ehdr
;
3676 p
->p_filesz
+= alloc
* bed
->s
->sizeof_phdr
;
3677 p
->p_memsz
+= alloc
* bed
->s
->sizeof_phdr
;
3680 if (p
->p_type
== PT_LOAD
3681 || (p
->p_type
== PT_NOTE
&& bfd_get_format (abfd
) == bfd_core
))
3683 if (! m
->includes_filehdr
&& ! m
->includes_phdrs
)
3689 adjust
= off
- (p
->p_offset
+ p
->p_filesz
);
3690 p
->p_filesz
+= adjust
;
3691 p
->p_memsz
+= adjust
;
3697 for (i
= 0, secpp
= m
->sections
; i
< m
->count
; i
++, secpp
++)
3701 bfd_size_type align
;
3705 align
= 1 << bfd_get_section_alignment (abfd
, sec
);
3707 /* The section may have artificial alignment forced by a
3708 link script. Notice this case by the gap between the
3709 cumulative phdr lma and the section's lma. */
3710 if (p
->p_paddr
+ p
->p_memsz
< sec
->lma
)
3712 bfd_vma adjust
= sec
->lma
- (p
->p_paddr
+ p
->p_memsz
);
3714 p
->p_memsz
+= adjust
;
3717 if ((flags
& SEC_LOAD
) != 0)
3718 p
->p_filesz
+= adjust
;
3721 if (p
->p_type
== PT_LOAD
)
3723 bfd_signed_vma adjust
;
3725 if ((flags
& SEC_LOAD
) != 0)
3727 adjust
= sec
->lma
- (p
->p_paddr
+ p
->p_memsz
);
3731 else if ((flags
& SEC_ALLOC
) != 0)
3733 /* The section VMA must equal the file position
3734 modulo the page size. FIXME: I'm not sure if
3735 this adjustment is really necessary. We used to
3736 not have the SEC_LOAD case just above, and then
3737 this was necessary, but now I'm not sure. */
3738 if ((abfd
->flags
& D_PAGED
) != 0)
3739 adjust
= (sec
->vma
- voff
) % bed
->maxpagesize
;
3741 adjust
= (sec
->vma
- voff
) % align
;
3750 (* _bfd_error_handler
) (_("\
3751 Error: First section in segment (%s) starts at 0x%x whereas the segment starts at 0x%x"),
3752 bfd_section_name (abfd
, sec
),
3757 p
->p_memsz
+= adjust
;
3760 if ((flags
& SEC_LOAD
) != 0)
3761 p
->p_filesz
+= adjust
;
3766 /* We check SEC_HAS_CONTENTS here because if NOLOAD is
3767 used in a linker script we may have a section with
3768 SEC_LOAD clear but which is supposed to have
3770 if ((flags
& SEC_LOAD
) != 0
3771 || (flags
& SEC_HAS_CONTENTS
) != 0)
3772 off
+= sec
->_raw_size
;
3774 if ((flags
& SEC_ALLOC
) != 0)
3775 voff
+= sec
->_raw_size
;
3778 if (p
->p_type
== PT_NOTE
&& bfd_get_format (abfd
) == bfd_core
)
3780 /* The actual "note" segment has i == 0.
3781 This is the one that actually contains everything. */
3785 p
->p_filesz
= sec
->_raw_size
;
3786 off
+= sec
->_raw_size
;
3791 /* Fake sections -- don't need to be written. */
3794 flags
= sec
->flags
= 0;
3801 p
->p_memsz
+= sec
->_raw_size
;
3803 if ((flags
& SEC_LOAD
) != 0)
3804 p
->p_filesz
+= sec
->_raw_size
;
3806 if (p
->p_type
== PT_TLS
3807 && sec
->_raw_size
== 0
3808 && (sec
->flags
& SEC_HAS_CONTENTS
) == 0)
3810 struct bfd_link_order
*o
;
3811 bfd_vma tbss_size
= 0;
3813 for (o
= sec
->link_order_head
; o
!= NULL
; o
= o
->next
)
3814 if (tbss_size
< o
->offset
+ o
->size
)
3815 tbss_size
= o
->offset
+ o
->size
;
3817 p
->p_memsz
+= tbss_size
;
3820 if (align
> p
->p_align
3821 && (p
->p_type
!= PT_LOAD
|| (abfd
->flags
& D_PAGED
) == 0))
3825 if (! m
->p_flags_valid
)
3828 if ((flags
& SEC_CODE
) != 0)
3830 if ((flags
& SEC_READONLY
) == 0)
3836 /* Now that we have set the section file positions, we can set up
3837 the file positions for the non PT_LOAD segments. */
3838 for (m
= elf_tdata (abfd
)->segment_map
, p
= phdrs
;
3842 if (p
->p_type
!= PT_LOAD
&& m
->count
> 0)
3844 BFD_ASSERT (! m
->includes_filehdr
&& ! m
->includes_phdrs
);
3845 p
->p_offset
= m
->sections
[0]->filepos
;
3849 if (m
->includes_filehdr
)
3851 p
->p_vaddr
= filehdr_vaddr
;
3852 if (! m
->p_paddr_valid
)
3853 p
->p_paddr
= filehdr_paddr
;
3855 else if (m
->includes_phdrs
)
3857 p
->p_vaddr
= phdrs_vaddr
;
3858 if (! m
->p_paddr_valid
)
3859 p
->p_paddr
= phdrs_paddr
;
3864 /* If additional nonloadable filepos adjustments are required,
3866 if (bed
->set_nonloadable_filepos
)
3867 (*bed
->set_nonloadable_filepos
) (abfd
, phdrs
);
3869 /* Clear out any program headers we allocated but did not use. */
3870 for (; count
< alloc
; count
++, p
++)
3872 memset (p
, 0, sizeof *p
);
3873 p
->p_type
= PT_NULL
;
3876 elf_tdata (abfd
)->phdr
= phdrs
;
3878 elf_tdata (abfd
)->next_file_pos
= off
;
3880 /* Write out the program headers. */
3881 if (bfd_seek (abfd
, (bfd_signed_vma
) bed
->s
->sizeof_ehdr
, SEEK_SET
) != 0
3882 || bed
->s
->write_out_phdrs (abfd
, phdrs
, alloc
) != 0)
3888 /* Get the size of the program header.
3890 If this is called by the linker before any of the section VMA's are set, it
3891 can't calculate the correct value for a strange memory layout. This only
3892 happens when SIZEOF_HEADERS is used in a linker script. In this case,
3893 SORTED_HDRS is NULL and we assume the normal scenario of one text and one
3894 data segment (exclusive of .interp and .dynamic).
3896 ??? User written scripts must either not use SIZEOF_HEADERS, or assume there
3897 will be two segments. */
3899 static bfd_size_type
3900 get_program_header_size (abfd
)
3905 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3907 /* We can't return a different result each time we're called. */
3908 if (elf_tdata (abfd
)->program_header_size
!= 0)
3909 return elf_tdata (abfd
)->program_header_size
;
3911 if (elf_tdata (abfd
)->segment_map
!= NULL
)
3913 struct elf_segment_map
*m
;
3916 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
3918 elf_tdata (abfd
)->program_header_size
= segs
* bed
->s
->sizeof_phdr
;
3919 return elf_tdata (abfd
)->program_header_size
;
3922 /* Assume we will need exactly two PT_LOAD segments: one for text
3923 and one for data. */
3926 s
= bfd_get_section_by_name (abfd
, ".interp");
3927 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0)
3929 /* If we have a loadable interpreter section, we need a
3930 PT_INTERP segment. In this case, assume we also need a
3931 PT_PHDR segment, although that may not be true for all
3936 if (bfd_get_section_by_name (abfd
, ".dynamic") != NULL
)
3938 /* We need a PT_DYNAMIC segment. */
3942 if (elf_tdata (abfd
)->eh_frame_hdr
3943 && bfd_get_section_by_name (abfd
, ".eh_frame_hdr") != NULL
)
3945 /* We need a PT_GNU_EH_FRAME segment. */
3949 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
3951 if ((s
->flags
& SEC_LOAD
) != 0
3952 && strncmp (s
->name
, ".note", 5) == 0)
3954 /* We need a PT_NOTE segment. */
3959 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
3961 if (s
->flags
& SEC_THREAD_LOCAL
)
3963 /* We need a PT_TLS segment. */
3969 /* Let the backend count up any program headers it might need. */
3970 if (bed
->elf_backend_additional_program_headers
)
3974 a
= (*bed
->elf_backend_additional_program_headers
) (abfd
);
3980 elf_tdata (abfd
)->program_header_size
= segs
* bed
->s
->sizeof_phdr
;
3981 return elf_tdata (abfd
)->program_header_size
;
3984 /* Work out the file positions of all the sections. This is called by
3985 _bfd_elf_compute_section_file_positions. All the section sizes and
3986 VMAs must be known before this is called.
3988 We do not consider reloc sections at this point, unless they form
3989 part of the loadable image. Reloc sections are assigned file
3990 positions in assign_file_positions_for_relocs, which is called by
3991 write_object_contents and final_link.
3993 We also don't set the positions of the .symtab and .strtab here. */
3996 assign_file_positions_except_relocs (abfd
)
3999 struct elf_obj_tdata
* const tdata
= elf_tdata (abfd
);
4000 Elf_Internal_Ehdr
* const i_ehdrp
= elf_elfheader (abfd
);
4001 Elf_Internal_Shdr
** const i_shdrpp
= elf_elfsections (abfd
);
4002 unsigned int num_sec
= elf_numsections (abfd
);
4004 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4006 if ((abfd
->flags
& (EXEC_P
| DYNAMIC
)) == 0
4007 && bfd_get_format (abfd
) != bfd_core
)
4009 Elf_Internal_Shdr
**hdrpp
;
4012 /* Start after the ELF header. */
4013 off
= i_ehdrp
->e_ehsize
;
4015 /* We are not creating an executable, which means that we are
4016 not creating a program header, and that the actual order of
4017 the sections in the file is unimportant. */
4018 for (i
= 1, hdrpp
= i_shdrpp
+ 1; i
< num_sec
; i
++, hdrpp
++)
4020 Elf_Internal_Shdr
*hdr
;
4023 if (hdr
->sh_type
== SHT_REL
4024 || hdr
->sh_type
== SHT_RELA
4025 || i
== tdata
->symtab_section
4026 || i
== tdata
->symtab_shndx_section
4027 || i
== tdata
->strtab_section
)
4029 hdr
->sh_offset
= -1;
4032 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, true);
4034 if (i
== SHN_LORESERVE
- 1)
4036 i
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4037 hdrpp
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4044 Elf_Internal_Shdr
**hdrpp
;
4046 /* Assign file positions for the loaded sections based on the
4047 assignment of sections to segments. */
4048 if (! assign_file_positions_for_segments (abfd
))
4051 /* Assign file positions for the other sections. */
4053 off
= elf_tdata (abfd
)->next_file_pos
;
4054 for (i
= 1, hdrpp
= i_shdrpp
+ 1; i
< num_sec
; i
++, hdrpp
++)
4056 Elf_Internal_Shdr
*hdr
;
4059 if (hdr
->bfd_section
!= NULL
4060 && hdr
->bfd_section
->filepos
!= 0)
4061 hdr
->sh_offset
= hdr
->bfd_section
->filepos
;
4062 else if ((hdr
->sh_flags
& SHF_ALLOC
) != 0)
4064 ((*_bfd_error_handler
)
4065 (_("%s: warning: allocated section `%s' not in segment"),
4066 bfd_get_filename (abfd
),
4067 (hdr
->bfd_section
== NULL
4069 : hdr
->bfd_section
->name
)));
4070 if ((abfd
->flags
& D_PAGED
) != 0)
4071 off
+= (hdr
->sh_addr
- off
) % bed
->maxpagesize
;
4073 off
+= (hdr
->sh_addr
- off
) % hdr
->sh_addralign
;
4074 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
,
4077 else if (hdr
->sh_type
== SHT_REL
4078 || hdr
->sh_type
== SHT_RELA
4079 || hdr
== i_shdrpp
[tdata
->symtab_section
]
4080 || hdr
== i_shdrpp
[tdata
->symtab_shndx_section
]
4081 || hdr
== i_shdrpp
[tdata
->strtab_section
])
4082 hdr
->sh_offset
= -1;
4084 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, true);
4086 if (i
== SHN_LORESERVE
- 1)
4088 i
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4089 hdrpp
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4094 /* Place the section headers. */
4095 off
= align_file_position (off
, bed
->s
->file_align
);
4096 i_ehdrp
->e_shoff
= off
;
4097 off
+= i_ehdrp
->e_shnum
* i_ehdrp
->e_shentsize
;
4099 elf_tdata (abfd
)->next_file_pos
= off
;
4108 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
4109 Elf_Internal_Phdr
*i_phdrp
= 0; /* Program header table, internal form */
4110 Elf_Internal_Shdr
**i_shdrp
; /* Section header table, internal form */
4111 struct elf_strtab_hash
*shstrtab
;
4112 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4114 i_ehdrp
= elf_elfheader (abfd
);
4115 i_shdrp
= elf_elfsections (abfd
);
4117 shstrtab
= _bfd_elf_strtab_init ();
4118 if (shstrtab
== NULL
)
4121 elf_shstrtab (abfd
) = shstrtab
;
4123 i_ehdrp
->e_ident
[EI_MAG0
] = ELFMAG0
;
4124 i_ehdrp
->e_ident
[EI_MAG1
] = ELFMAG1
;
4125 i_ehdrp
->e_ident
[EI_MAG2
] = ELFMAG2
;
4126 i_ehdrp
->e_ident
[EI_MAG3
] = ELFMAG3
;
4128 i_ehdrp
->e_ident
[EI_CLASS
] = bed
->s
->elfclass
;
4129 i_ehdrp
->e_ident
[EI_DATA
] =
4130 bfd_big_endian (abfd
) ? ELFDATA2MSB
: ELFDATA2LSB
;
4131 i_ehdrp
->e_ident
[EI_VERSION
] = bed
->s
->ev_current
;
4133 if ((abfd
->flags
& DYNAMIC
) != 0)
4134 i_ehdrp
->e_type
= ET_DYN
;
4135 else if ((abfd
->flags
& EXEC_P
) != 0)
4136 i_ehdrp
->e_type
= ET_EXEC
;
4137 else if (bfd_get_format (abfd
) == bfd_core
)
4138 i_ehdrp
->e_type
= ET_CORE
;
4140 i_ehdrp
->e_type
= ET_REL
;
4142 switch (bfd_get_arch (abfd
))
4144 case bfd_arch_unknown
:
4145 i_ehdrp
->e_machine
= EM_NONE
;
4148 /* There used to be a long list of cases here, each one setting
4149 e_machine to the same EM_* macro #defined as ELF_MACHINE_CODE
4150 in the corresponding bfd definition. To avoid duplication,
4151 the switch was removed. Machines that need special handling
4152 can generally do it in elf_backend_final_write_processing(),
4153 unless they need the information earlier than the final write.
4154 Such need can generally be supplied by replacing the tests for
4155 e_machine with the conditions used to determine it. */
4157 if (get_elf_backend_data (abfd
) != NULL
)
4158 i_ehdrp
->e_machine
= get_elf_backend_data (abfd
)->elf_machine_code
;
4160 i_ehdrp
->e_machine
= EM_NONE
;
4163 i_ehdrp
->e_version
= bed
->s
->ev_current
;
4164 i_ehdrp
->e_ehsize
= bed
->s
->sizeof_ehdr
;
4166 /* No program header, for now. */
4167 i_ehdrp
->e_phoff
= 0;
4168 i_ehdrp
->e_phentsize
= 0;
4169 i_ehdrp
->e_phnum
= 0;
4171 /* Each bfd section is section header entry. */
4172 i_ehdrp
->e_entry
= bfd_get_start_address (abfd
);
4173 i_ehdrp
->e_shentsize
= bed
->s
->sizeof_shdr
;
4175 /* If we're building an executable, we'll need a program header table. */
4176 if (abfd
->flags
& EXEC_P
)
4178 /* It all happens later. */
4180 i_ehdrp
->e_phentsize
= sizeof (Elf_External_Phdr
);
4182 /* elf_build_phdrs() returns a (NULL-terminated) array of
4183 Elf_Internal_Phdrs. */
4184 i_phdrp
= elf_build_phdrs (abfd
, i_ehdrp
, i_shdrp
, &i_ehdrp
->e_phnum
);
4185 i_ehdrp
->e_phoff
= outbase
;
4186 outbase
+= i_ehdrp
->e_phentsize
* i_ehdrp
->e_phnum
;
4191 i_ehdrp
->e_phentsize
= 0;
4193 i_ehdrp
->e_phoff
= 0;
4196 elf_tdata (abfd
)->symtab_hdr
.sh_name
=
4197 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".symtab", false);
4198 elf_tdata (abfd
)->strtab_hdr
.sh_name
=
4199 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".strtab", false);
4200 elf_tdata (abfd
)->shstrtab_hdr
.sh_name
=
4201 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".shstrtab", false);
4202 if (elf_tdata (abfd
)->symtab_hdr
.sh_name
== (unsigned int) -1
4203 || elf_tdata (abfd
)->symtab_hdr
.sh_name
== (unsigned int) -1
4204 || elf_tdata (abfd
)->shstrtab_hdr
.sh_name
== (unsigned int) -1)
4210 /* Assign file positions for all the reloc sections which are not part
4211 of the loadable file image. */
4214 _bfd_elf_assign_file_positions_for_relocs (abfd
)
4218 unsigned int i
, num_sec
;
4219 Elf_Internal_Shdr
**shdrpp
;
4221 off
= elf_tdata (abfd
)->next_file_pos
;
4223 num_sec
= elf_numsections (abfd
);
4224 for (i
= 1, shdrpp
= elf_elfsections (abfd
) + 1; i
< num_sec
; i
++, shdrpp
++)
4226 Elf_Internal_Shdr
*shdrp
;
4229 if ((shdrp
->sh_type
== SHT_REL
|| shdrp
->sh_type
== SHT_RELA
)
4230 && shdrp
->sh_offset
== -1)
4231 off
= _bfd_elf_assign_file_position_for_section (shdrp
, off
, true);
4234 elf_tdata (abfd
)->next_file_pos
= off
;
4238 _bfd_elf_write_object_contents (abfd
)
4241 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4242 Elf_Internal_Ehdr
*i_ehdrp
;
4243 Elf_Internal_Shdr
**i_shdrp
;
4245 unsigned int count
, num_sec
;
4247 if (! abfd
->output_has_begun
4248 && ! _bfd_elf_compute_section_file_positions
4249 (abfd
, (struct bfd_link_info
*) NULL
))
4252 i_shdrp
= elf_elfsections (abfd
);
4253 i_ehdrp
= elf_elfheader (abfd
);
4256 bfd_map_over_sections (abfd
, bed
->s
->write_relocs
, &failed
);
4260 _bfd_elf_assign_file_positions_for_relocs (abfd
);
4262 /* After writing the headers, we need to write the sections too... */
4263 num_sec
= elf_numsections (abfd
);
4264 for (count
= 1; count
< num_sec
; count
++)
4266 if (bed
->elf_backend_section_processing
)
4267 (*bed
->elf_backend_section_processing
) (abfd
, i_shdrp
[count
]);
4268 if (i_shdrp
[count
]->contents
)
4270 bfd_size_type amt
= i_shdrp
[count
]->sh_size
;
4272 if (bfd_seek (abfd
, i_shdrp
[count
]->sh_offset
, SEEK_SET
) != 0
4273 || bfd_bwrite (i_shdrp
[count
]->contents
, amt
, abfd
) != amt
)
4276 if (count
== SHN_LORESERVE
- 1)
4277 count
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4280 /* Write out the section header names. */
4281 if (bfd_seek (abfd
, elf_tdata (abfd
)->shstrtab_hdr
.sh_offset
, SEEK_SET
) != 0
4282 || ! _bfd_elf_strtab_emit (abfd
, elf_shstrtab (abfd
)))
4285 if (bed
->elf_backend_final_write_processing
)
4286 (*bed
->elf_backend_final_write_processing
) (abfd
,
4287 elf_tdata (abfd
)->linker
);
4289 return bed
->s
->write_shdrs_and_ehdr (abfd
);
4293 _bfd_elf_write_corefile_contents (abfd
)
4296 /* Hopefully this can be done just like an object file. */
4297 return _bfd_elf_write_object_contents (abfd
);
4300 /* Given a section, search the header to find them. */
4303 _bfd_elf_section_from_bfd_section (abfd
, asect
)
4307 struct elf_backend_data
*bed
;
4310 if (elf_section_data (asect
) != NULL
4311 && elf_section_data (asect
)->this_idx
!= 0)
4312 return elf_section_data (asect
)->this_idx
;
4314 if (bfd_is_abs_section (asect
))
4316 else if (bfd_is_com_section (asect
))
4318 else if (bfd_is_und_section (asect
))
4322 Elf_Internal_Shdr
**i_shdrp
= elf_elfsections (abfd
);
4323 int maxindex
= elf_numsections (abfd
);
4325 for (index
= 1; index
< maxindex
; index
++)
4327 Elf_Internal_Shdr
*hdr
= i_shdrp
[index
];
4329 if (hdr
!= NULL
&& hdr
->bfd_section
== asect
)
4335 bed
= get_elf_backend_data (abfd
);
4336 if (bed
->elf_backend_section_from_bfd_section
)
4340 if ((*bed
->elf_backend_section_from_bfd_section
) (abfd
, asect
, &retval
))
4345 bfd_set_error (bfd_error_nonrepresentable_section
);
4350 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
4354 _bfd_elf_symbol_from_bfd_symbol (abfd
, asym_ptr_ptr
)
4356 asymbol
**asym_ptr_ptr
;
4358 asymbol
*asym_ptr
= *asym_ptr_ptr
;
4360 flagword flags
= asym_ptr
->flags
;
4362 /* When gas creates relocations against local labels, it creates its
4363 own symbol for the section, but does put the symbol into the
4364 symbol chain, so udata is 0. When the linker is generating
4365 relocatable output, this section symbol may be for one of the
4366 input sections rather than the output section. */
4367 if (asym_ptr
->udata
.i
== 0
4368 && (flags
& BSF_SECTION_SYM
)
4369 && asym_ptr
->section
)
4373 if (asym_ptr
->section
->output_section
!= NULL
)
4374 indx
= asym_ptr
->section
->output_section
->index
;
4376 indx
= asym_ptr
->section
->index
;
4377 if (indx
< elf_num_section_syms (abfd
)
4378 && elf_section_syms (abfd
)[indx
] != NULL
)
4379 asym_ptr
->udata
.i
= elf_section_syms (abfd
)[indx
]->udata
.i
;
4382 idx
= asym_ptr
->udata
.i
;
4386 /* This case can occur when using --strip-symbol on a symbol
4387 which is used in a relocation entry. */
4388 (*_bfd_error_handler
)
4389 (_("%s: symbol `%s' required but not present"),
4390 bfd_archive_filename (abfd
), bfd_asymbol_name (asym_ptr
));
4391 bfd_set_error (bfd_error_no_symbols
);
4398 "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n",
4399 (long) asym_ptr
, asym_ptr
->name
, idx
, flags
,
4400 elf_symbol_flags (flags
));
4408 /* Copy private BFD data. This copies any program header information. */
4411 copy_private_bfd_data (ibfd
, obfd
)
4415 Elf_Internal_Ehdr
* iehdr
;
4416 struct elf_segment_map
* map
;
4417 struct elf_segment_map
* map_first
;
4418 struct elf_segment_map
** pointer_to_map
;
4419 Elf_Internal_Phdr
* segment
;
4422 unsigned int num_segments
;
4423 boolean phdr_included
= false;
4424 bfd_vma maxpagesize
;
4425 struct elf_segment_map
* phdr_adjust_seg
= NULL
;
4426 unsigned int phdr_adjust_num
= 0;
4427 struct elf_backend_data
* bed
;
4429 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
4430 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
4433 if (elf_tdata (ibfd
)->phdr
== NULL
)
4436 bed
= get_elf_backend_data (ibfd
);
4437 iehdr
= elf_elfheader (ibfd
);
4440 pointer_to_map
= &map_first
;
4442 num_segments
= elf_elfheader (ibfd
)->e_phnum
;
4443 maxpagesize
= get_elf_backend_data (obfd
)->maxpagesize
;
4445 /* Returns the end address of the segment + 1. */
4446 #define SEGMENT_END(segment, start) \
4447 (start + (segment->p_memsz > segment->p_filesz \
4448 ? segment->p_memsz : segment->p_filesz))
4450 /* Returns true if the given section is contained within
4451 the given segment. VMA addresses are compared. */
4452 #define IS_CONTAINED_BY_VMA(section, segment) \
4453 (section->vma >= segment->p_vaddr \
4454 && (section->vma + section->_raw_size) \
4455 <= (SEGMENT_END (segment, segment->p_vaddr)))
4457 /* Returns true if the given section is contained within
4458 the given segment. LMA addresses are compared. */
4459 #define IS_CONTAINED_BY_LMA(section, segment, base) \
4460 (section->lma >= base \
4461 && (section->lma + section->_raw_size) \
4462 <= SEGMENT_END (segment, base))
4464 /* Returns true if the given section is contained within the
4465 given segment. Filepos addresses are compared in an elf
4466 backend function. */
4467 #define IS_CONTAINED_BY_FILEPOS(sec, seg, bed) \
4468 (bed->is_contained_by_filepos \
4469 && (*bed->is_contained_by_filepos) (sec, seg))
4471 /* Special case: corefile "NOTE" section containing regs, prpsinfo etc. */
4472 #define IS_COREFILE_NOTE(p, s) \
4473 (p->p_type == PT_NOTE \
4474 && bfd_get_format (ibfd) == bfd_core \
4475 && s->vma == 0 && s->lma == 0 \
4476 && (bfd_vma) s->filepos >= p->p_offset \
4477 && (bfd_vma) s->filepos + s->_raw_size \
4478 <= p->p_offset + p->p_filesz)
4480 /* The complicated case when p_vaddr is 0 is to handle the Solaris
4481 linker, which generates a PT_INTERP section with p_vaddr and
4482 p_memsz set to 0. */
4483 #define IS_SOLARIS_PT_INTERP(p, s) \
4485 && p->p_filesz > 0 \
4486 && (s->flags & SEC_HAS_CONTENTS) != 0 \
4487 && s->_raw_size > 0 \
4488 && (bfd_vma) s->filepos >= p->p_offset \
4489 && ((bfd_vma) s->filepos + s->_raw_size \
4490 <= p->p_offset + p->p_filesz))
4492 /* Decide if the given section should be included in the given segment.
4493 A section will be included if:
4494 1. It is within the address space of the segment -- we use the LMA
4495 if that is set for the segment and the VMA otherwise,
4496 2. It is an allocated segment,
4497 3. There is an output section associated with it,
4498 4. The section has not already been allocated to a previous segment. */
4499 #define INCLUDE_SECTION_IN_SEGMENT(section, segment, bed) \
4500 (((((segment->p_paddr \
4501 ? IS_CONTAINED_BY_LMA (section, segment, segment->p_paddr) \
4502 : IS_CONTAINED_BY_VMA (section, segment)) \
4503 || IS_SOLARIS_PT_INTERP (segment, section)) \
4504 && (section->flags & SEC_ALLOC) != 0) \
4505 || IS_COREFILE_NOTE (segment, section) \
4506 || (IS_CONTAINED_BY_FILEPOS (section, segment, bed) \
4507 && (section->flags & SEC_ALLOC) == 0)) \
4508 && section->output_section != NULL \
4509 && section->segment_mark == false)
4511 /* Returns true iff seg1 starts after the end of seg2. */
4512 #define SEGMENT_AFTER_SEGMENT(seg1, seg2) \
4513 (seg1->p_vaddr >= SEGMENT_END (seg2, seg2->p_vaddr))
4515 /* Returns true iff seg1 and seg2 overlap. */
4516 #define SEGMENT_OVERLAPS(seg1, seg2) \
4517 (!(SEGMENT_AFTER_SEGMENT (seg1, seg2) || SEGMENT_AFTER_SEGMENT (seg2, seg1)))
4519 /* Initialise the segment mark field. */
4520 for (section
= ibfd
->sections
; section
!= NULL
; section
= section
->next
)
4521 section
->segment_mark
= false;
4523 /* Scan through the segments specified in the program header
4524 of the input BFD. For this first scan we look for overlaps
4525 in the loadable segments. These can be created by weird
4526 parameters to objcopy. */
4527 for (i
= 0, segment
= elf_tdata (ibfd
)->phdr
;
4532 Elf_Internal_Phdr
*segment2
;
4534 if (segment
->p_type
!= PT_LOAD
)
4537 /* Determine if this segment overlaps any previous segments. */
4538 for (j
= 0, segment2
= elf_tdata (ibfd
)->phdr
; j
< i
; j
++, segment2
++)
4540 bfd_signed_vma extra_length
;
4542 if (segment2
->p_type
!= PT_LOAD
4543 || ! SEGMENT_OVERLAPS (segment
, segment2
))
4546 /* Merge the two segments together. */
4547 if (segment2
->p_vaddr
< segment
->p_vaddr
)
4549 /* Extend SEGMENT2 to include SEGMENT and then delete
4552 SEGMENT_END (segment
, segment
->p_vaddr
)
4553 - SEGMENT_END (segment2
, segment2
->p_vaddr
);
4555 if (extra_length
> 0)
4557 segment2
->p_memsz
+= extra_length
;
4558 segment2
->p_filesz
+= extra_length
;
4561 segment
->p_type
= PT_NULL
;
4563 /* Since we have deleted P we must restart the outer loop. */
4565 segment
= elf_tdata (ibfd
)->phdr
;
4570 /* Extend SEGMENT to include SEGMENT2 and then delete
4573 SEGMENT_END (segment2
, segment2
->p_vaddr
)
4574 - SEGMENT_END (segment
, segment
->p_vaddr
);
4576 if (extra_length
> 0)
4578 segment
->p_memsz
+= extra_length
;
4579 segment
->p_filesz
+= extra_length
;
4582 segment2
->p_type
= PT_NULL
;
4587 /* The second scan attempts to assign sections to segments. */
4588 for (i
= 0, segment
= elf_tdata (ibfd
)->phdr
;
4592 unsigned int section_count
;
4593 asection
** sections
;
4594 asection
* output_section
;
4596 bfd_vma matching_lma
;
4597 bfd_vma suggested_lma
;
4601 if (segment
->p_type
== PT_NULL
)
4604 /* Compute how many sections might be placed into this segment. */
4606 for (section
= ibfd
->sections
; section
!= NULL
; section
= section
->next
)
4607 if (INCLUDE_SECTION_IN_SEGMENT (section
, segment
, bed
))
4610 /* Allocate a segment map big enough to contain all of the
4611 sections we have selected. */
4612 amt
= sizeof (struct elf_segment_map
);
4613 amt
+= ((bfd_size_type
) section_count
- 1) * sizeof (asection
*);
4614 map
= (struct elf_segment_map
*) bfd_alloc (obfd
, amt
);
4618 /* Initialise the fields of the segment map. Default to
4619 using the physical address of the segment in the input BFD. */
4621 map
->p_type
= segment
->p_type
;
4622 map
->p_flags
= segment
->p_flags
;
4623 map
->p_flags_valid
= 1;
4624 map
->p_paddr
= segment
->p_paddr
;
4625 map
->p_paddr_valid
= 1;
4627 /* Determine if this segment contains the ELF file header
4628 and if it contains the program headers themselves. */
4629 map
->includes_filehdr
= (segment
->p_offset
== 0
4630 && segment
->p_filesz
>= iehdr
->e_ehsize
);
4632 map
->includes_phdrs
= 0;
4634 if (! phdr_included
|| segment
->p_type
!= PT_LOAD
)
4636 map
->includes_phdrs
=
4637 (segment
->p_offset
<= (bfd_vma
) iehdr
->e_phoff
4638 && (segment
->p_offset
+ segment
->p_filesz
4639 >= ((bfd_vma
) iehdr
->e_phoff
4640 + iehdr
->e_phnum
* iehdr
->e_phentsize
)));
4642 if (segment
->p_type
== PT_LOAD
&& map
->includes_phdrs
)
4643 phdr_included
= true;
4646 if (section_count
== 0)
4648 /* Special segments, such as the PT_PHDR segment, may contain
4649 no sections, but ordinary, loadable segments should contain
4650 something. They are allowed by the ELF spec however, so only
4651 a warning is produced. */
4652 if (segment
->p_type
== PT_LOAD
)
4653 (*_bfd_error_handler
)
4654 (_("%s: warning: Empty loadable segment detected, is this intentional ?\n"),
4655 bfd_archive_filename (ibfd
));
4658 *pointer_to_map
= map
;
4659 pointer_to_map
= &map
->next
;
4664 /* Now scan the sections in the input BFD again and attempt
4665 to add their corresponding output sections to the segment map.
4666 The problem here is how to handle an output section which has
4667 been moved (ie had its LMA changed). There are four possibilities:
4669 1. None of the sections have been moved.
4670 In this case we can continue to use the segment LMA from the
4673 2. All of the sections have been moved by the same amount.
4674 In this case we can change the segment's LMA to match the LMA
4675 of the first section.
4677 3. Some of the sections have been moved, others have not.
4678 In this case those sections which have not been moved can be
4679 placed in the current segment which will have to have its size,
4680 and possibly its LMA changed, and a new segment or segments will
4681 have to be created to contain the other sections.
4683 4. The sections have been moved, but not be the same amount.
4684 In this case we can change the segment's LMA to match the LMA
4685 of the first section and we will have to create a new segment
4686 or segments to contain the other sections.
4688 In order to save time, we allocate an array to hold the section
4689 pointers that we are interested in. As these sections get assigned
4690 to a segment, they are removed from this array. */
4692 /* Gcc 2.96 miscompiles this code on mips. Don't do casting here
4693 to work around this long long bug. */
4694 amt
= section_count
* sizeof (asection
*);
4695 sections
= (asection
**) bfd_malloc (amt
);
4696 if (sections
== NULL
)
4699 /* Step One: Scan for segment vs section LMA conflicts.
4700 Also add the sections to the section array allocated above.
4701 Also add the sections to the current segment. In the common
4702 case, where the sections have not been moved, this means that
4703 we have completely filled the segment, and there is nothing
4709 for (j
= 0, section
= ibfd
->sections
;
4711 section
= section
->next
)
4713 if (INCLUDE_SECTION_IN_SEGMENT (section
, segment
, bed
))
4715 output_section
= section
->output_section
;
4717 sections
[j
++] = section
;
4719 /* The Solaris native linker always sets p_paddr to 0.
4720 We try to catch that case here, and set it to the
4722 if (segment
->p_paddr
== 0
4723 && segment
->p_vaddr
!= 0
4725 && output_section
->lma
!= 0
4726 && (output_section
->vma
== (segment
->p_vaddr
4727 + (map
->includes_filehdr
4730 + (map
->includes_phdrs
4732 * iehdr
->e_phentsize
)
4734 map
->p_paddr
= segment
->p_vaddr
;
4736 /* Match up the physical address of the segment with the
4737 LMA address of the output section. */
4738 if (IS_CONTAINED_BY_LMA (output_section
, segment
, map
->p_paddr
)
4739 || IS_CONTAINED_BY_FILEPOS (section
, segment
, bed
)
4740 || IS_COREFILE_NOTE (segment
, section
))
4742 if (matching_lma
== 0)
4743 matching_lma
= output_section
->lma
;
4745 /* We assume that if the section fits within the segment
4746 then it does not overlap any other section within that
4748 map
->sections
[isec
++] = output_section
;
4750 else if (suggested_lma
== 0)
4751 suggested_lma
= output_section
->lma
;
4755 BFD_ASSERT (j
== section_count
);
4757 /* Step Two: Adjust the physical address of the current segment,
4759 if (isec
== section_count
)
4761 /* All of the sections fitted within the segment as currently
4762 specified. This is the default case. Add the segment to
4763 the list of built segments and carry on to process the next
4764 program header in the input BFD. */
4765 map
->count
= section_count
;
4766 *pointer_to_map
= map
;
4767 pointer_to_map
= &map
->next
;
4774 if (matching_lma
!= 0)
4776 /* At least one section fits inside the current segment.
4777 Keep it, but modify its physical address to match the
4778 LMA of the first section that fitted. */
4779 map
->p_paddr
= matching_lma
;
4783 /* None of the sections fitted inside the current segment.
4784 Change the current segment's physical address to match
4785 the LMA of the first section. */
4786 map
->p_paddr
= suggested_lma
;
4789 /* Offset the segment physical address from the lma
4790 to allow for space taken up by elf headers. */
4791 if (map
->includes_filehdr
)
4792 map
->p_paddr
-= iehdr
->e_ehsize
;
4794 if (map
->includes_phdrs
)
4796 map
->p_paddr
-= iehdr
->e_phnum
* iehdr
->e_phentsize
;
4798 /* iehdr->e_phnum is just an estimate of the number
4799 of program headers that we will need. Make a note
4800 here of the number we used and the segment we chose
4801 to hold these headers, so that we can adjust the
4802 offset when we know the correct value. */
4803 phdr_adjust_num
= iehdr
->e_phnum
;
4804 phdr_adjust_seg
= map
;
4808 /* Step Three: Loop over the sections again, this time assigning
4809 those that fit to the current segment and removing them from the
4810 sections array; but making sure not to leave large gaps. Once all
4811 possible sections have been assigned to the current segment it is
4812 added to the list of built segments and if sections still remain
4813 to be assigned, a new segment is constructed before repeating
4821 /* Fill the current segment with sections that fit. */
4822 for (j
= 0; j
< section_count
; j
++)
4824 section
= sections
[j
];
4826 if (section
== NULL
)
4829 output_section
= section
->output_section
;
4831 BFD_ASSERT (output_section
!= NULL
);
4833 if (IS_CONTAINED_BY_LMA (output_section
, segment
, map
->p_paddr
)
4834 || IS_COREFILE_NOTE (segment
, section
))
4836 if (map
->count
== 0)
4838 /* If the first section in a segment does not start at
4839 the beginning of the segment, then something is
4841 if (output_section
->lma
!=
4843 + (map
->includes_filehdr
? iehdr
->e_ehsize
: 0)
4844 + (map
->includes_phdrs
4845 ? iehdr
->e_phnum
* iehdr
->e_phentsize
4851 asection
* prev_sec
;
4853 prev_sec
= map
->sections
[map
->count
- 1];
4855 /* If the gap between the end of the previous section
4856 and the start of this section is more than
4857 maxpagesize then we need to start a new segment. */
4858 if ((BFD_ALIGN (prev_sec
->lma
+ prev_sec
->_raw_size
,
4860 < BFD_ALIGN (output_section
->lma
, maxpagesize
))
4861 || ((prev_sec
->lma
+ prev_sec
->_raw_size
)
4862 > output_section
->lma
))
4864 if (suggested_lma
== 0)
4865 suggested_lma
= output_section
->lma
;
4871 map
->sections
[map
->count
++] = output_section
;
4874 section
->segment_mark
= true;
4876 else if (suggested_lma
== 0)
4877 suggested_lma
= output_section
->lma
;
4880 BFD_ASSERT (map
->count
> 0);
4882 /* Add the current segment to the list of built segments. */
4883 *pointer_to_map
= map
;
4884 pointer_to_map
= &map
->next
;
4886 if (isec
< section_count
)
4888 /* We still have not allocated all of the sections to
4889 segments. Create a new segment here, initialise it
4890 and carry on looping. */
4891 amt
= sizeof (struct elf_segment_map
);
4892 amt
+= ((bfd_size_type
) section_count
- 1) * sizeof (asection
*);
4893 map
= (struct elf_segment_map
*) bfd_alloc (obfd
, amt
);
4897 /* Initialise the fields of the segment map. Set the physical
4898 physical address to the LMA of the first section that has
4899 not yet been assigned. */
4901 map
->p_type
= segment
->p_type
;
4902 map
->p_flags
= segment
->p_flags
;
4903 map
->p_flags_valid
= 1;
4904 map
->p_paddr
= suggested_lma
;
4905 map
->p_paddr_valid
= 1;
4906 map
->includes_filehdr
= 0;
4907 map
->includes_phdrs
= 0;
4910 while (isec
< section_count
);
4915 /* The Solaris linker creates program headers in which all the
4916 p_paddr fields are zero. When we try to objcopy or strip such a
4917 file, we get confused. Check for this case, and if we find it
4918 reset the p_paddr_valid fields. */
4919 for (map
= map_first
; map
!= NULL
; map
= map
->next
)
4920 if (map
->p_paddr
!= 0)
4924 for (map
= map_first
; map
!= NULL
; map
= map
->next
)
4925 map
->p_paddr_valid
= 0;
4928 elf_tdata (obfd
)->segment_map
= map_first
;
4930 /* If we had to estimate the number of program headers that were
4931 going to be needed, then check our estimate now and adjust
4932 the offset if necessary. */
4933 if (phdr_adjust_seg
!= NULL
)
4937 for (count
= 0, map
= map_first
; map
!= NULL
; map
= map
->next
)
4940 if (count
> phdr_adjust_num
)
4941 phdr_adjust_seg
->p_paddr
4942 -= (count
- phdr_adjust_num
) * iehdr
->e_phentsize
;
4946 /* Final Step: Sort the segments into ascending order of physical
4948 if (map_first
!= NULL
)
4950 struct elf_segment_map
*prev
;
4953 for (map
= map_first
->next
; map
!= NULL
; prev
= map
, map
= map
->next
)
4955 /* Yes I know - its a bubble sort.... */
4956 if (map
->next
!= NULL
&& (map
->next
->p_paddr
< map
->p_paddr
))
4958 /* Swap map and map->next. */
4959 prev
->next
= map
->next
;
4960 map
->next
= map
->next
->next
;
4961 prev
->next
->next
= map
;
4971 #undef IS_CONTAINED_BY_VMA
4972 #undef IS_CONTAINED_BY_LMA
4973 #undef IS_CONTAINED_BY_FILEPOS
4974 #undef IS_COREFILE_NOTE
4975 #undef IS_SOLARIS_PT_INTERP
4976 #undef INCLUDE_SECTION_IN_SEGMENT
4977 #undef SEGMENT_AFTER_SEGMENT
4978 #undef SEGMENT_OVERLAPS
4982 /* Copy private section information. This copies over the entsize
4983 field, and sometimes the info field. */
4986 _bfd_elf_copy_private_section_data (ibfd
, isec
, obfd
, osec
)
4992 Elf_Internal_Shdr
*ihdr
, *ohdr
;
4993 const struct elf_backend_data
*bed
= get_elf_backend_data (ibfd
);
4995 if (ibfd
->xvec
->flavour
!= bfd_target_elf_flavour
4996 || obfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
4999 /* Copy over private BFD data if it has not already been copied.
5000 This must be done here, rather than in the copy_private_bfd_data
5001 entry point, because the latter is called after the section
5002 contents have been set, which means that the program headers have
5003 already been worked out. The backend function provides a way to
5004 override the test conditions and code path for the call to
5005 copy_private_bfd_data. */
5006 if (bed
->copy_private_bfd_data_p
)
5008 if ((*bed
->copy_private_bfd_data_p
) (ibfd
, isec
, obfd
, osec
))
5009 if (! copy_private_bfd_data (ibfd
, obfd
))
5012 else if (elf_tdata (obfd
)->segment_map
== NULL
&& elf_tdata (ibfd
)->phdr
!= NULL
)
5016 /* Only set up the segments if there are no more SEC_ALLOC
5017 sections. FIXME: This won't do the right thing if objcopy is
5018 used to remove the last SEC_ALLOC section, since objcopy
5019 won't call this routine in that case. */
5020 for (s
= isec
->next
; s
!= NULL
; s
= s
->next
)
5021 if ((s
->flags
& SEC_ALLOC
) != 0)
5025 if (! copy_private_bfd_data (ibfd
, obfd
))
5030 ihdr
= &elf_section_data (isec
)->this_hdr
;
5031 ohdr
= &elf_section_data (osec
)->this_hdr
;
5033 ohdr
->sh_entsize
= ihdr
->sh_entsize
;
5035 if (ihdr
->sh_type
== SHT_SYMTAB
5036 || ihdr
->sh_type
== SHT_DYNSYM
5037 || ihdr
->sh_type
== SHT_GNU_verneed
5038 || ihdr
->sh_type
== SHT_GNU_verdef
)
5039 ohdr
->sh_info
= ihdr
->sh_info
;
5041 /* Set things up for objcopy. The output SHT_GROUP section will
5042 have its elf_next_in_group pointing back to the input group
5044 elf_next_in_group (osec
) = elf_next_in_group (isec
);
5045 elf_group_name (osec
) = elf_group_name (isec
);
5047 elf_section_data (osec
)->use_rela_p
5048 = elf_section_data (isec
)->use_rela_p
;
5053 /* Copy private symbol information. If this symbol is in a section
5054 which we did not map into a BFD section, try to map the section
5055 index correctly. We use special macro definitions for the mapped
5056 section indices; these definitions are interpreted by the
5057 swap_out_syms function. */
5059 #define MAP_ONESYMTAB (SHN_HIOS + 1)
5060 #define MAP_DYNSYMTAB (SHN_HIOS + 2)
5061 #define MAP_STRTAB (SHN_HIOS + 3)
5062 #define MAP_SHSTRTAB (SHN_HIOS + 4)
5063 #define MAP_SYM_SHNDX (SHN_HIOS + 5)
5066 _bfd_elf_copy_private_symbol_data (ibfd
, isymarg
, obfd
, osymarg
)
5072 elf_symbol_type
*isym
, *osym
;
5074 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
5075 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
5078 isym
= elf_symbol_from (ibfd
, isymarg
);
5079 osym
= elf_symbol_from (obfd
, osymarg
);
5083 && bfd_is_abs_section (isym
->symbol
.section
))
5087 shndx
= isym
->internal_elf_sym
.st_shndx
;
5088 if (shndx
== elf_onesymtab (ibfd
))
5089 shndx
= MAP_ONESYMTAB
;
5090 else if (shndx
== elf_dynsymtab (ibfd
))
5091 shndx
= MAP_DYNSYMTAB
;
5092 else if (shndx
== elf_tdata (ibfd
)->strtab_section
)
5094 else if (shndx
== elf_tdata (ibfd
)->shstrtab_section
)
5095 shndx
= MAP_SHSTRTAB
;
5096 else if (shndx
== elf_tdata (ibfd
)->symtab_shndx_section
)
5097 shndx
= MAP_SYM_SHNDX
;
5098 osym
->internal_elf_sym
.st_shndx
= shndx
;
5104 /* Swap out the symbols. */
5107 swap_out_syms (abfd
, sttp
, relocatable_p
)
5109 struct bfd_strtab_hash
**sttp
;
5112 struct elf_backend_data
*bed
;
5115 struct bfd_strtab_hash
*stt
;
5116 Elf_Internal_Shdr
*symtab_hdr
;
5117 Elf_Internal_Shdr
*symtab_shndx_hdr
;
5118 Elf_Internal_Shdr
*symstrtab_hdr
;
5119 char *outbound_syms
;
5120 char *outbound_shndx
;
5124 if (!elf_map_symbols (abfd
))
5127 /* Dump out the symtabs. */
5128 stt
= _bfd_elf_stringtab_init ();
5132 bed
= get_elf_backend_data (abfd
);
5133 symcount
= bfd_get_symcount (abfd
);
5134 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
5135 symtab_hdr
->sh_type
= SHT_SYMTAB
;
5136 symtab_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
5137 symtab_hdr
->sh_size
= symtab_hdr
->sh_entsize
* (symcount
+ 1);
5138 symtab_hdr
->sh_info
= elf_num_locals (abfd
) + 1;
5139 symtab_hdr
->sh_addralign
= bed
->s
->file_align
;
5141 symstrtab_hdr
= &elf_tdata (abfd
)->strtab_hdr
;
5142 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
5144 amt
= (bfd_size_type
) (1 + symcount
) * bed
->s
->sizeof_sym
;
5145 outbound_syms
= bfd_alloc (abfd
, amt
);
5146 if (outbound_syms
== NULL
)
5148 symtab_hdr
->contents
= (PTR
) outbound_syms
;
5150 outbound_shndx
= NULL
;
5151 symtab_shndx_hdr
= &elf_tdata (abfd
)->symtab_shndx_hdr
;
5152 if (symtab_shndx_hdr
->sh_name
!= 0)
5154 amt
= (bfd_size_type
) (1 + symcount
) * sizeof (Elf_External_Sym_Shndx
);
5155 outbound_shndx
= bfd_zalloc (abfd
, amt
);
5156 if (outbound_shndx
== NULL
)
5158 symtab_shndx_hdr
->contents
= outbound_shndx
;
5159 symtab_shndx_hdr
->sh_type
= SHT_SYMTAB_SHNDX
;
5160 symtab_shndx_hdr
->sh_size
= amt
;
5161 symtab_shndx_hdr
->sh_addralign
= sizeof (Elf_External_Sym_Shndx
);
5162 symtab_shndx_hdr
->sh_entsize
= sizeof (Elf_External_Sym_Shndx
);
5165 /* now generate the data (for "contents") */
5167 /* Fill in zeroth symbol and swap it out. */
5168 Elf_Internal_Sym sym
;
5174 sym
.st_shndx
= SHN_UNDEF
;
5175 bed
->s
->swap_symbol_out (abfd
, &sym
, outbound_syms
, outbound_shndx
);
5176 outbound_syms
+= bed
->s
->sizeof_sym
;
5177 if (outbound_shndx
!= NULL
)
5178 outbound_shndx
+= sizeof (Elf_External_Sym_Shndx
);
5181 syms
= bfd_get_outsymbols (abfd
);
5182 for (idx
= 0; idx
< symcount
; idx
++)
5184 Elf_Internal_Sym sym
;
5185 bfd_vma value
= syms
[idx
]->value
;
5186 elf_symbol_type
*type_ptr
;
5187 flagword flags
= syms
[idx
]->flags
;
5190 if ((flags
& (BSF_SECTION_SYM
| BSF_GLOBAL
)) == BSF_SECTION_SYM
)
5192 /* Local section symbols have no name. */
5197 sym
.st_name
= (unsigned long) _bfd_stringtab_add (stt
,
5200 if (sym
.st_name
== (unsigned long) -1)
5204 type_ptr
= elf_symbol_from (abfd
, syms
[idx
]);
5206 if ((flags
& BSF_SECTION_SYM
) == 0
5207 && bfd_is_com_section (syms
[idx
]->section
))
5209 /* ELF common symbols put the alignment into the `value' field,
5210 and the size into the `size' field. This is backwards from
5211 how BFD handles it, so reverse it here. */
5212 sym
.st_size
= value
;
5213 if (type_ptr
== NULL
5214 || type_ptr
->internal_elf_sym
.st_value
== 0)
5215 sym
.st_value
= value
>= 16 ? 16 : (1 << bfd_log2 (value
));
5217 sym
.st_value
= type_ptr
->internal_elf_sym
.st_value
;
5218 sym
.st_shndx
= _bfd_elf_section_from_bfd_section
5219 (abfd
, syms
[idx
]->section
);
5223 asection
*sec
= syms
[idx
]->section
;
5226 if (sec
->output_section
)
5228 value
+= sec
->output_offset
;
5229 sec
= sec
->output_section
;
5231 /* Don't add in the section vma for relocatable output. */
5232 if (! relocatable_p
)
5234 sym
.st_value
= value
;
5235 sym
.st_size
= type_ptr
? type_ptr
->internal_elf_sym
.st_size
: 0;
5237 if (bfd_is_abs_section (sec
)
5239 && type_ptr
->internal_elf_sym
.st_shndx
!= 0)
5241 /* This symbol is in a real ELF section which we did
5242 not create as a BFD section. Undo the mapping done
5243 by copy_private_symbol_data. */
5244 shndx
= type_ptr
->internal_elf_sym
.st_shndx
;
5248 shndx
= elf_onesymtab (abfd
);
5251 shndx
= elf_dynsymtab (abfd
);
5254 shndx
= elf_tdata (abfd
)->strtab_section
;
5257 shndx
= elf_tdata (abfd
)->shstrtab_section
;
5260 shndx
= elf_tdata (abfd
)->symtab_shndx_section
;
5268 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec
);
5274 /* Writing this would be a hell of a lot easier if
5275 we had some decent documentation on bfd, and
5276 knew what to expect of the library, and what to
5277 demand of applications. For example, it
5278 appears that `objcopy' might not set the
5279 section of a symbol to be a section that is
5280 actually in the output file. */
5281 sec2
= bfd_get_section_by_name (abfd
, sec
->name
);
5282 BFD_ASSERT (sec2
!= 0);
5283 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec2
);
5284 BFD_ASSERT (shndx
!= -1);
5288 sym
.st_shndx
= shndx
;
5291 if ((flags
& BSF_THREAD_LOCAL
) != 0)
5293 else if ((flags
& BSF_FUNCTION
) != 0)
5295 else if ((flags
& BSF_OBJECT
) != 0)
5300 if (syms
[idx
]->section
->flags
& SEC_THREAD_LOCAL
)
5303 /* Processor-specific types */
5304 if (type_ptr
!= NULL
5305 && bed
->elf_backend_get_symbol_type
)
5306 type
= ((*bed
->elf_backend_get_symbol_type
)
5307 (&type_ptr
->internal_elf_sym
, type
));
5309 if (flags
& BSF_SECTION_SYM
)
5311 if (flags
& BSF_GLOBAL
)
5312 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, STT_SECTION
);
5314 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_SECTION
);
5316 else if (bfd_is_com_section (syms
[idx
]->section
))
5317 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, type
);
5318 else if (bfd_is_und_section (syms
[idx
]->section
))
5319 sym
.st_info
= ELF_ST_INFO (((flags
& BSF_WEAK
)
5323 else if (flags
& BSF_FILE
)
5324 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FILE
);
5327 int bind
= STB_LOCAL
;
5329 if (flags
& BSF_LOCAL
)
5331 else if (flags
& BSF_WEAK
)
5333 else if (flags
& BSF_GLOBAL
)
5336 sym
.st_info
= ELF_ST_INFO (bind
, type
);
5339 if (type_ptr
!= NULL
)
5340 sym
.st_other
= type_ptr
->internal_elf_sym
.st_other
;
5344 bed
->s
->swap_symbol_out (abfd
, &sym
, outbound_syms
, outbound_shndx
);
5345 outbound_syms
+= bed
->s
->sizeof_sym
;
5346 if (outbound_shndx
!= NULL
)
5347 outbound_shndx
+= sizeof (Elf_External_Sym_Shndx
);
5351 symstrtab_hdr
->sh_size
= _bfd_stringtab_size (stt
);
5352 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
5354 symstrtab_hdr
->sh_flags
= 0;
5355 symstrtab_hdr
->sh_addr
= 0;
5356 symstrtab_hdr
->sh_entsize
= 0;
5357 symstrtab_hdr
->sh_link
= 0;
5358 symstrtab_hdr
->sh_info
= 0;
5359 symstrtab_hdr
->sh_addralign
= 1;
5364 /* Return the number of bytes required to hold the symtab vector.
5366 Note that we base it on the count plus 1, since we will null terminate
5367 the vector allocated based on this size. However, the ELF symbol table
5368 always has a dummy entry as symbol #0, so it ends up even. */
5371 _bfd_elf_get_symtab_upper_bound (abfd
)
5376 Elf_Internal_Shdr
*hdr
= &elf_tdata (abfd
)->symtab_hdr
;
5378 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
5379 symtab_size
= (symcount
+ 1) * (sizeof (asymbol
*));
5381 symtab_size
-= sizeof (asymbol
*);
5387 _bfd_elf_get_dynamic_symtab_upper_bound (abfd
)
5392 Elf_Internal_Shdr
*hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
5394 if (elf_dynsymtab (abfd
) == 0)
5396 bfd_set_error (bfd_error_invalid_operation
);
5400 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
5401 symtab_size
= (symcount
+ 1) * (sizeof (asymbol
*));
5403 symtab_size
-= sizeof (asymbol
*);
5409 _bfd_elf_get_reloc_upper_bound (abfd
, asect
)
5410 bfd
*abfd ATTRIBUTE_UNUSED
;
5413 return (asect
->reloc_count
+ 1) * sizeof (arelent
*);
5416 /* Canonicalize the relocs. */
5419 _bfd_elf_canonicalize_reloc (abfd
, section
, relptr
, symbols
)
5427 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
5429 if (! bed
->s
->slurp_reloc_table (abfd
, section
, symbols
, false))
5432 tblptr
= section
->relocation
;
5433 for (i
= 0; i
< section
->reloc_count
; i
++)
5434 *relptr
++ = tblptr
++;
5438 return section
->reloc_count
;
5442 _bfd_elf_get_symtab (abfd
, alocation
)
5444 asymbol
**alocation
;
5446 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
5447 long symcount
= bed
->s
->slurp_symbol_table (abfd
, alocation
, false);
5450 bfd_get_symcount (abfd
) = symcount
;
5455 _bfd_elf_canonicalize_dynamic_symtab (abfd
, alocation
)
5457 asymbol
**alocation
;
5459 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
5460 return bed
->s
->slurp_symbol_table (abfd
, alocation
, true);
5463 /* Return the size required for the dynamic reloc entries. Any
5464 section that was actually installed in the BFD, and has type
5465 SHT_REL or SHT_RELA, and uses the dynamic symbol table, is
5466 considered to be a dynamic reloc section. */
5469 _bfd_elf_get_dynamic_reloc_upper_bound (abfd
)
5475 if (elf_dynsymtab (abfd
) == 0)
5477 bfd_set_error (bfd_error_invalid_operation
);
5481 ret
= sizeof (arelent
*);
5482 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
5483 if (elf_section_data (s
)->this_hdr
.sh_link
== elf_dynsymtab (abfd
)
5484 && (elf_section_data (s
)->this_hdr
.sh_type
== SHT_REL
5485 || elf_section_data (s
)->this_hdr
.sh_type
== SHT_RELA
))
5486 ret
+= ((s
->_raw_size
/ elf_section_data (s
)->this_hdr
.sh_entsize
)
5487 * sizeof (arelent
*));
5492 /* Canonicalize the dynamic relocation entries. Note that we return
5493 the dynamic relocations as a single block, although they are
5494 actually associated with particular sections; the interface, which
5495 was designed for SunOS style shared libraries, expects that there
5496 is only one set of dynamic relocs. Any section that was actually
5497 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses
5498 the dynamic symbol table, is considered to be a dynamic reloc
5502 _bfd_elf_canonicalize_dynamic_reloc (abfd
, storage
, syms
)
5507 boolean (*slurp_relocs
) PARAMS ((bfd
*, asection
*, asymbol
**, boolean
));
5511 if (elf_dynsymtab (abfd
) == 0)
5513 bfd_set_error (bfd_error_invalid_operation
);
5517 slurp_relocs
= get_elf_backend_data (abfd
)->s
->slurp_reloc_table
;
5519 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
5521 if (elf_section_data (s
)->this_hdr
.sh_link
== elf_dynsymtab (abfd
)
5522 && (elf_section_data (s
)->this_hdr
.sh_type
== SHT_REL
5523 || elf_section_data (s
)->this_hdr
.sh_type
== SHT_RELA
))
5528 if (! (*slurp_relocs
) (abfd
, s
, syms
, true))
5530 count
= s
->_raw_size
/ elf_section_data (s
)->this_hdr
.sh_entsize
;
5532 for (i
= 0; i
< count
; i
++)
5543 /* Read in the version information. */
5546 _bfd_elf_slurp_version_tables (abfd
)
5549 bfd_byte
*contents
= NULL
;
5552 if (elf_dynverdef (abfd
) != 0)
5554 Elf_Internal_Shdr
*hdr
;
5555 Elf_External_Verdef
*everdef
;
5556 Elf_Internal_Verdef
*iverdef
;
5557 Elf_Internal_Verdef
*iverdefarr
;
5558 Elf_Internal_Verdef iverdefmem
;
5560 unsigned int maxidx
;
5562 hdr
= &elf_tdata (abfd
)->dynverdef_hdr
;
5564 contents
= (bfd_byte
*) bfd_malloc (hdr
->sh_size
);
5565 if (contents
== NULL
)
5567 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
5568 || bfd_bread ((PTR
) contents
, hdr
->sh_size
, abfd
) != hdr
->sh_size
)
5571 /* We know the number of entries in the section but not the maximum
5572 index. Therefore we have to run through all entries and find
5574 everdef
= (Elf_External_Verdef
*) contents
;
5576 for (i
= 0; i
< hdr
->sh_info
; ++i
)
5578 _bfd_elf_swap_verdef_in (abfd
, everdef
, &iverdefmem
);
5580 if ((iverdefmem
.vd_ndx
& ((unsigned) VERSYM_VERSION
)) > maxidx
)
5581 maxidx
= iverdefmem
.vd_ndx
& ((unsigned) VERSYM_VERSION
);
5583 everdef
= ((Elf_External_Verdef
*)
5584 ((bfd_byte
*) everdef
+ iverdefmem
.vd_next
));
5587 amt
= (bfd_size_type
) maxidx
* sizeof (Elf_Internal_Verdef
);
5588 elf_tdata (abfd
)->verdef
= (Elf_Internal_Verdef
*) bfd_zalloc (abfd
, amt
);
5589 if (elf_tdata (abfd
)->verdef
== NULL
)
5592 elf_tdata (abfd
)->cverdefs
= maxidx
;
5594 everdef
= (Elf_External_Verdef
*) contents
;
5595 iverdefarr
= elf_tdata (abfd
)->verdef
;
5596 for (i
= 0; i
< hdr
->sh_info
; i
++)
5598 Elf_External_Verdaux
*everdaux
;
5599 Elf_Internal_Verdaux
*iverdaux
;
5602 _bfd_elf_swap_verdef_in (abfd
, everdef
, &iverdefmem
);
5604 iverdef
= &iverdefarr
[(iverdefmem
.vd_ndx
& VERSYM_VERSION
) - 1];
5605 memcpy (iverdef
, &iverdefmem
, sizeof (Elf_Internal_Verdef
));
5607 iverdef
->vd_bfd
= abfd
;
5609 amt
= (bfd_size_type
) iverdef
->vd_cnt
* sizeof (Elf_Internal_Verdaux
);
5610 iverdef
->vd_auxptr
= (Elf_Internal_Verdaux
*) bfd_alloc (abfd
, amt
);
5611 if (iverdef
->vd_auxptr
== NULL
)
5614 everdaux
= ((Elf_External_Verdaux
*)
5615 ((bfd_byte
*) everdef
+ iverdef
->vd_aux
));
5616 iverdaux
= iverdef
->vd_auxptr
;
5617 for (j
= 0; j
< iverdef
->vd_cnt
; j
++, iverdaux
++)
5619 _bfd_elf_swap_verdaux_in (abfd
, everdaux
, iverdaux
);
5621 iverdaux
->vda_nodename
=
5622 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
5623 iverdaux
->vda_name
);
5624 if (iverdaux
->vda_nodename
== NULL
)
5627 if (j
+ 1 < iverdef
->vd_cnt
)
5628 iverdaux
->vda_nextptr
= iverdaux
+ 1;
5630 iverdaux
->vda_nextptr
= NULL
;
5632 everdaux
= ((Elf_External_Verdaux
*)
5633 ((bfd_byte
*) everdaux
+ iverdaux
->vda_next
));
5636 iverdef
->vd_nodename
= iverdef
->vd_auxptr
->vda_nodename
;
5638 if (i
+ 1 < hdr
->sh_info
)
5639 iverdef
->vd_nextdef
= iverdef
+ 1;
5641 iverdef
->vd_nextdef
= NULL
;
5643 everdef
= ((Elf_External_Verdef
*)
5644 ((bfd_byte
*) everdef
+ iverdef
->vd_next
));
5651 if (elf_dynverref (abfd
) != 0)
5653 Elf_Internal_Shdr
*hdr
;
5654 Elf_External_Verneed
*everneed
;
5655 Elf_Internal_Verneed
*iverneed
;
5658 hdr
= &elf_tdata (abfd
)->dynverref_hdr
;
5660 amt
= (bfd_size_type
) hdr
->sh_info
* sizeof (Elf_Internal_Verneed
);
5661 elf_tdata (abfd
)->verref
=
5662 (Elf_Internal_Verneed
*) bfd_zalloc (abfd
, amt
);
5663 if (elf_tdata (abfd
)->verref
== NULL
)
5666 elf_tdata (abfd
)->cverrefs
= hdr
->sh_info
;
5668 contents
= (bfd_byte
*) bfd_malloc (hdr
->sh_size
);
5669 if (contents
== NULL
)
5671 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
5672 || bfd_bread ((PTR
) contents
, hdr
->sh_size
, abfd
) != hdr
->sh_size
)
5675 everneed
= (Elf_External_Verneed
*) contents
;
5676 iverneed
= elf_tdata (abfd
)->verref
;
5677 for (i
= 0; i
< hdr
->sh_info
; i
++, iverneed
++)
5679 Elf_External_Vernaux
*evernaux
;
5680 Elf_Internal_Vernaux
*ivernaux
;
5683 _bfd_elf_swap_verneed_in (abfd
, everneed
, iverneed
);
5685 iverneed
->vn_bfd
= abfd
;
5687 iverneed
->vn_filename
=
5688 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
5690 if (iverneed
->vn_filename
== NULL
)
5693 amt
= iverneed
->vn_cnt
;
5694 amt
*= sizeof (Elf_Internal_Vernaux
);
5695 iverneed
->vn_auxptr
= (Elf_Internal_Vernaux
*) bfd_alloc (abfd
, amt
);
5697 evernaux
= ((Elf_External_Vernaux
*)
5698 ((bfd_byte
*) everneed
+ iverneed
->vn_aux
));
5699 ivernaux
= iverneed
->vn_auxptr
;
5700 for (j
= 0; j
< iverneed
->vn_cnt
; j
++, ivernaux
++)
5702 _bfd_elf_swap_vernaux_in (abfd
, evernaux
, ivernaux
);
5704 ivernaux
->vna_nodename
=
5705 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
5706 ivernaux
->vna_name
);
5707 if (ivernaux
->vna_nodename
== NULL
)
5710 if (j
+ 1 < iverneed
->vn_cnt
)
5711 ivernaux
->vna_nextptr
= ivernaux
+ 1;
5713 ivernaux
->vna_nextptr
= NULL
;
5715 evernaux
= ((Elf_External_Vernaux
*)
5716 ((bfd_byte
*) evernaux
+ ivernaux
->vna_next
));
5719 if (i
+ 1 < hdr
->sh_info
)
5720 iverneed
->vn_nextref
= iverneed
+ 1;
5722 iverneed
->vn_nextref
= NULL
;
5724 everneed
= ((Elf_External_Verneed
*)
5725 ((bfd_byte
*) everneed
+ iverneed
->vn_next
));
5735 if (contents
== NULL
)
5741 _bfd_elf_make_empty_symbol (abfd
)
5744 elf_symbol_type
*newsym
;
5745 bfd_size_type amt
= sizeof (elf_symbol_type
);
5747 newsym
= (elf_symbol_type
*) bfd_zalloc (abfd
, amt
);
5752 newsym
->symbol
.the_bfd
= abfd
;
5753 return &newsym
->symbol
;
5758 _bfd_elf_get_symbol_info (ignore_abfd
, symbol
, ret
)
5759 bfd
*ignore_abfd ATTRIBUTE_UNUSED
;
5763 bfd_symbol_info (symbol
, ret
);
5766 /* Return whether a symbol name implies a local symbol. Most targets
5767 use this function for the is_local_label_name entry point, but some
5771 _bfd_elf_is_local_label_name (abfd
, name
)
5772 bfd
*abfd ATTRIBUTE_UNUSED
;
5775 /* Normal local symbols start with ``.L''. */
5776 if (name
[0] == '.' && name
[1] == 'L')
5779 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
5780 DWARF debugging symbols starting with ``..''. */
5781 if (name
[0] == '.' && name
[1] == '.')
5784 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
5785 emitting DWARF debugging output. I suspect this is actually a
5786 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
5787 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
5788 underscore to be emitted on some ELF targets). For ease of use,
5789 we treat such symbols as local. */
5790 if (name
[0] == '_' && name
[1] == '.' && name
[2] == 'L' && name
[3] == '_')
5797 _bfd_elf_get_lineno (ignore_abfd
, symbol
)
5798 bfd
*ignore_abfd ATTRIBUTE_UNUSED
;
5799 asymbol
*symbol ATTRIBUTE_UNUSED
;
5806 _bfd_elf_set_arch_mach (abfd
, arch
, machine
)
5808 enum bfd_architecture arch
;
5809 unsigned long machine
;
5811 /* If this isn't the right architecture for this backend, and this
5812 isn't the generic backend, fail. */
5813 if (arch
!= get_elf_backend_data (abfd
)->arch
5814 && arch
!= bfd_arch_unknown
5815 && get_elf_backend_data (abfd
)->arch
!= bfd_arch_unknown
)
5818 return bfd_default_set_arch_mach (abfd
, arch
, machine
);
5821 /* Find the function to a particular section and offset,
5822 for error reporting. */
5825 elf_find_function (abfd
, section
, symbols
, offset
,
5826 filename_ptr
, functionname_ptr
)
5827 bfd
*abfd ATTRIBUTE_UNUSED
;
5831 const char **filename_ptr
;
5832 const char **functionname_ptr
;
5834 const char *filename
;
5843 for (p
= symbols
; *p
!= NULL
; p
++)
5847 q
= (elf_symbol_type
*) *p
;
5849 if (bfd_get_section (&q
->symbol
) != section
)
5852 switch (ELF_ST_TYPE (q
->internal_elf_sym
.st_info
))
5857 filename
= bfd_asymbol_name (&q
->symbol
);
5861 if (q
->symbol
.section
== section
5862 && q
->symbol
.value
>= low_func
5863 && q
->symbol
.value
<= offset
)
5865 func
= (asymbol
*) q
;
5866 low_func
= q
->symbol
.value
;
5876 *filename_ptr
= filename
;
5877 if (functionname_ptr
)
5878 *functionname_ptr
= bfd_asymbol_name (func
);
5883 /* Find the nearest line to a particular section and offset,
5884 for error reporting. */
5887 _bfd_elf_find_nearest_line (abfd
, section
, symbols
, offset
,
5888 filename_ptr
, functionname_ptr
, line_ptr
)
5893 const char **filename_ptr
;
5894 const char **functionname_ptr
;
5895 unsigned int *line_ptr
;
5899 if (_bfd_dwarf1_find_nearest_line (abfd
, section
, symbols
, offset
,
5900 filename_ptr
, functionname_ptr
,
5903 if (!*functionname_ptr
)
5904 elf_find_function (abfd
, section
, symbols
, offset
,
5905 *filename_ptr
? NULL
: filename_ptr
,
5911 if (_bfd_dwarf2_find_nearest_line (abfd
, section
, symbols
, offset
,
5912 filename_ptr
, functionname_ptr
,
5914 &elf_tdata (abfd
)->dwarf2_find_line_info
))
5916 if (!*functionname_ptr
)
5917 elf_find_function (abfd
, section
, symbols
, offset
,
5918 *filename_ptr
? NULL
: filename_ptr
,
5924 if (! _bfd_stab_section_find_nearest_line (abfd
, symbols
, section
, offset
,
5925 &found
, filename_ptr
,
5926 functionname_ptr
, line_ptr
,
5927 &elf_tdata (abfd
)->line_info
))
5932 if (symbols
== NULL
)
5935 if (! elf_find_function (abfd
, section
, symbols
, offset
,
5936 filename_ptr
, functionname_ptr
))
5944 _bfd_elf_sizeof_headers (abfd
, reloc
)
5950 ret
= get_elf_backend_data (abfd
)->s
->sizeof_ehdr
;
5952 ret
+= get_program_header_size (abfd
);
5957 _bfd_elf_set_section_contents (abfd
, section
, location
, offset
, count
)
5962 bfd_size_type count
;
5964 Elf_Internal_Shdr
*hdr
;
5967 if (! abfd
->output_has_begun
5968 && ! _bfd_elf_compute_section_file_positions
5969 (abfd
, (struct bfd_link_info
*) NULL
))
5972 hdr
= &elf_section_data (section
)->this_hdr
;
5973 pos
= hdr
->sh_offset
+ offset
;
5974 if (bfd_seek (abfd
, pos
, SEEK_SET
) != 0
5975 || bfd_bwrite (location
, count
, abfd
) != count
)
5982 _bfd_elf_no_info_to_howto (abfd
, cache_ptr
, dst
)
5983 bfd
*abfd ATTRIBUTE_UNUSED
;
5984 arelent
*cache_ptr ATTRIBUTE_UNUSED
;
5985 Elf_Internal_Rela
*dst ATTRIBUTE_UNUSED
;
5992 _bfd_elf_no_info_to_howto_rel (abfd
, cache_ptr
, dst
)
5995 Elf_Internal_Rel
*dst
;
6001 /* Try to convert a non-ELF reloc into an ELF one. */
6004 _bfd_elf_validate_reloc (abfd
, areloc
)
6008 /* Check whether we really have an ELF howto. */
6010 if ((*areloc
->sym_ptr_ptr
)->the_bfd
->xvec
!= abfd
->xvec
)
6012 bfd_reloc_code_real_type code
;
6013 reloc_howto_type
*howto
;
6015 /* Alien reloc: Try to determine its type to replace it with an
6016 equivalent ELF reloc. */
6018 if (areloc
->howto
->pc_relative
)
6020 switch (areloc
->howto
->bitsize
)
6023 code
= BFD_RELOC_8_PCREL
;
6026 code
= BFD_RELOC_12_PCREL
;
6029 code
= BFD_RELOC_16_PCREL
;
6032 code
= BFD_RELOC_24_PCREL
;
6035 code
= BFD_RELOC_32_PCREL
;
6038 code
= BFD_RELOC_64_PCREL
;
6044 howto
= bfd_reloc_type_lookup (abfd
, code
);
6046 if (areloc
->howto
->pcrel_offset
!= howto
->pcrel_offset
)
6048 if (howto
->pcrel_offset
)
6049 areloc
->addend
+= areloc
->address
;
6051 areloc
->addend
-= areloc
->address
; /* addend is unsigned!! */
6056 switch (areloc
->howto
->bitsize
)
6062 code
= BFD_RELOC_14
;
6065 code
= BFD_RELOC_16
;
6068 code
= BFD_RELOC_26
;
6071 code
= BFD_RELOC_32
;
6074 code
= BFD_RELOC_64
;
6080 howto
= bfd_reloc_type_lookup (abfd
, code
);
6084 areloc
->howto
= howto
;
6092 (*_bfd_error_handler
)
6093 (_("%s: unsupported relocation type %s"),
6094 bfd_archive_filename (abfd
), areloc
->howto
->name
);
6095 bfd_set_error (bfd_error_bad_value
);
6100 _bfd_elf_close_and_cleanup (abfd
)
6103 if (bfd_get_format (abfd
) == bfd_object
)
6105 if (elf_shstrtab (abfd
) != NULL
)
6106 _bfd_elf_strtab_free (elf_shstrtab (abfd
));
6109 return _bfd_generic_close_and_cleanup (abfd
);
6112 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
6113 in the relocation's offset. Thus we cannot allow any sort of sanity
6114 range-checking to interfere. There is nothing else to do in processing
6117 bfd_reloc_status_type
6118 _bfd_elf_rel_vtable_reloc_fn (abfd
, re
, symbol
, data
, is
, obfd
, errmsg
)
6119 bfd
*abfd ATTRIBUTE_UNUSED
;
6120 arelent
*re ATTRIBUTE_UNUSED
;
6121 struct symbol_cache_entry
*symbol ATTRIBUTE_UNUSED
;
6122 PTR data ATTRIBUTE_UNUSED
;
6123 asection
*is ATTRIBUTE_UNUSED
;
6124 bfd
*obfd ATTRIBUTE_UNUSED
;
6125 char **errmsg ATTRIBUTE_UNUSED
;
6127 return bfd_reloc_ok
;
6130 /* Elf core file support. Much of this only works on native
6131 toolchains, since we rely on knowing the
6132 machine-dependent procfs structure in order to pick
6133 out details about the corefile. */
6135 #ifdef HAVE_SYS_PROCFS_H
6136 # include <sys/procfs.h>
6139 /* FIXME: this is kinda wrong, but it's what gdb wants. */
6142 elfcore_make_pid (abfd
)
6145 return ((elf_tdata (abfd
)->core_lwpid
<< 16)
6146 + (elf_tdata (abfd
)->core_pid
));
6149 /* If there isn't a section called NAME, make one, using
6150 data from SECT. Note, this function will generate a
6151 reference to NAME, so you shouldn't deallocate or
6155 elfcore_maybe_make_sect (abfd
, name
, sect
)
6162 if (bfd_get_section_by_name (abfd
, name
) != NULL
)
6165 sect2
= bfd_make_section (abfd
, name
);
6169 sect2
->_raw_size
= sect
->_raw_size
;
6170 sect2
->filepos
= sect
->filepos
;
6171 sect2
->flags
= sect
->flags
;
6172 sect2
->alignment_power
= sect
->alignment_power
;
6176 /* Create a pseudosection containing SIZE bytes at FILEPOS. This
6177 actually creates up to two pseudosections:
6178 - For the single-threaded case, a section named NAME, unless
6179 such a section already exists.
6180 - For the multi-threaded case, a section named "NAME/PID", where
6181 PID is elfcore_make_pid (abfd).
6182 Both pseudosections have identical contents. */
6184 _bfd_elfcore_make_pseudosection (abfd
, name
, size
, filepos
)
6191 char *threaded_name
;
6194 /* Build the section name. */
6196 sprintf (buf
, "%s/%d", name
, elfcore_make_pid (abfd
));
6197 threaded_name
= bfd_alloc (abfd
, (bfd_size_type
) strlen (buf
) + 1);
6198 if (threaded_name
== NULL
)
6200 strcpy (threaded_name
, buf
);
6202 sect
= bfd_make_section (abfd
, threaded_name
);
6205 sect
->_raw_size
= size
;
6206 sect
->filepos
= filepos
;
6207 sect
->flags
= SEC_HAS_CONTENTS
;
6208 sect
->alignment_power
= 2;
6210 return elfcore_maybe_make_sect (abfd
, name
, sect
);
6213 /* prstatus_t exists on:
6215 linux 2.[01] + glibc
6219 #if defined (HAVE_PRSTATUS_T)
6220 static boolean elfcore_grok_prstatus
PARAMS ((bfd
*, Elf_Internal_Note
*));
6223 elfcore_grok_prstatus (abfd
, note
)
6225 Elf_Internal_Note
*note
;
6230 if (note
->descsz
== sizeof (prstatus_t
))
6234 raw_size
= sizeof (prstat
.pr_reg
);
6235 offset
= offsetof (prstatus_t
, pr_reg
);
6236 memcpy (&prstat
, note
->descdata
, sizeof (prstat
));
6238 /* Do not overwrite the core signal if it
6239 has already been set by another thread. */
6240 if (elf_tdata (abfd
)->core_signal
== 0)
6241 elf_tdata (abfd
)->core_signal
= prstat
.pr_cursig
;
6242 elf_tdata (abfd
)->core_pid
= prstat
.pr_pid
;
6244 /* pr_who exists on:
6247 pr_who doesn't exist on:
6250 #if defined (HAVE_PRSTATUS_T_PR_WHO)
6251 elf_tdata (abfd
)->core_lwpid
= prstat
.pr_who
;
6254 #if defined (HAVE_PRSTATUS32_T)
6255 else if (note
->descsz
== sizeof (prstatus32_t
))
6257 /* 64-bit host, 32-bit corefile */
6258 prstatus32_t prstat
;
6260 raw_size
= sizeof (prstat
.pr_reg
);
6261 offset
= offsetof (prstatus32_t
, pr_reg
);
6262 memcpy (&prstat
, note
->descdata
, sizeof (prstat
));
6264 /* Do not overwrite the core signal if it
6265 has already been set by another thread. */
6266 if (elf_tdata (abfd
)->core_signal
== 0)
6267 elf_tdata (abfd
)->core_signal
= prstat
.pr_cursig
;
6268 elf_tdata (abfd
)->core_pid
= prstat
.pr_pid
;
6270 /* pr_who exists on:
6273 pr_who doesn't exist on:
6276 #if defined (HAVE_PRSTATUS32_T_PR_WHO)
6277 elf_tdata (abfd
)->core_lwpid
= prstat
.pr_who
;
6280 #endif /* HAVE_PRSTATUS32_T */
6283 /* Fail - we don't know how to handle any other
6284 note size (ie. data object type). */
6288 /* Make a ".reg/999" section and a ".reg" section. */
6289 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
6290 raw_size
, note
->descpos
+ offset
);
6292 #endif /* defined (HAVE_PRSTATUS_T) */
6294 /* Create a pseudosection containing the exact contents of NOTE. */
6296 elfcore_make_note_pseudosection (abfd
, name
, note
)
6299 Elf_Internal_Note
*note
;
6301 return _bfd_elfcore_make_pseudosection (abfd
, name
,
6302 note
->descsz
, note
->descpos
);
6305 /* There isn't a consistent prfpregset_t across platforms,
6306 but it doesn't matter, because we don't have to pick this
6307 data structure apart. */
6310 elfcore_grok_prfpreg (abfd
, note
)
6312 Elf_Internal_Note
*note
;
6314 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
6317 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
6318 type of 5 (NT_PRXFPREG). Just include the whole note's contents
6322 elfcore_grok_prxfpreg (abfd
, note
)
6324 Elf_Internal_Note
*note
;
6326 return elfcore_make_note_pseudosection (abfd
, ".reg-xfp", note
);
6329 #if defined (HAVE_PRPSINFO_T)
6330 typedef prpsinfo_t elfcore_psinfo_t
;
6331 #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
6332 typedef prpsinfo32_t elfcore_psinfo32_t
;
6336 #if defined (HAVE_PSINFO_T)
6337 typedef psinfo_t elfcore_psinfo_t
;
6338 #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
6339 typedef psinfo32_t elfcore_psinfo32_t
;
6343 /* return a malloc'ed copy of a string at START which is at
6344 most MAX bytes long, possibly without a terminating '\0'.
6345 the copy will always have a terminating '\0'. */
6348 _bfd_elfcore_strndup (abfd
, start
, max
)
6354 char *end
= memchr (start
, '\0', max
);
6362 dups
= bfd_alloc (abfd
, (bfd_size_type
) len
+ 1);
6366 memcpy (dups
, start
, len
);
6372 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
6373 static boolean elfcore_grok_psinfo
PARAMS ((bfd
*, Elf_Internal_Note
*));
6376 elfcore_grok_psinfo (abfd
, note
)
6378 Elf_Internal_Note
*note
;
6380 if (note
->descsz
== sizeof (elfcore_psinfo_t
))
6382 elfcore_psinfo_t psinfo
;
6384 memcpy (&psinfo
, note
->descdata
, sizeof (psinfo
));
6386 elf_tdata (abfd
)->core_program
6387 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_fname
,
6388 sizeof (psinfo
.pr_fname
));
6390 elf_tdata (abfd
)->core_command
6391 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_psargs
,
6392 sizeof (psinfo
.pr_psargs
));
6394 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
6395 else if (note
->descsz
== sizeof (elfcore_psinfo32_t
))
6397 /* 64-bit host, 32-bit corefile */
6398 elfcore_psinfo32_t psinfo
;
6400 memcpy (&psinfo
, note
->descdata
, sizeof (psinfo
));
6402 elf_tdata (abfd
)->core_program
6403 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_fname
,
6404 sizeof (psinfo
.pr_fname
));
6406 elf_tdata (abfd
)->core_command
6407 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_psargs
,
6408 sizeof (psinfo
.pr_psargs
));
6414 /* Fail - we don't know how to handle any other
6415 note size (ie. data object type). */
6419 /* Note that for some reason, a spurious space is tacked
6420 onto the end of the args in some (at least one anyway)
6421 implementations, so strip it off if it exists. */
6424 char *command
= elf_tdata (abfd
)->core_command
;
6425 int n
= strlen (command
);
6427 if (0 < n
&& command
[n
- 1] == ' ')
6428 command
[n
- 1] = '\0';
6433 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
6435 #if defined (HAVE_PSTATUS_T)
6436 static boolean elfcore_grok_pstatus
PARAMS ((bfd
*, Elf_Internal_Note
*));
6439 elfcore_grok_pstatus (abfd
, note
)
6441 Elf_Internal_Note
*note
;
6443 if (note
->descsz
== sizeof (pstatus_t
)
6444 #if defined (HAVE_PXSTATUS_T)
6445 || note
->descsz
== sizeof (pxstatus_t
)
6451 memcpy (&pstat
, note
->descdata
, sizeof (pstat
));
6453 elf_tdata (abfd
)->core_pid
= pstat
.pr_pid
;
6455 #if defined (HAVE_PSTATUS32_T)
6456 else if (note
->descsz
== sizeof (pstatus32_t
))
6458 /* 64-bit host, 32-bit corefile */
6461 memcpy (&pstat
, note
->descdata
, sizeof (pstat
));
6463 elf_tdata (abfd
)->core_pid
= pstat
.pr_pid
;
6466 /* Could grab some more details from the "representative"
6467 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
6468 NT_LWPSTATUS note, presumably. */
6472 #endif /* defined (HAVE_PSTATUS_T) */
6474 #if defined (HAVE_LWPSTATUS_T)
6475 static boolean elfcore_grok_lwpstatus
PARAMS ((bfd
*, Elf_Internal_Note
*));
6478 elfcore_grok_lwpstatus (abfd
, note
)
6480 Elf_Internal_Note
*note
;
6482 lwpstatus_t lwpstat
;
6487 if (note
->descsz
!= sizeof (lwpstat
)
6488 #if defined (HAVE_LWPXSTATUS_T)
6489 && note
->descsz
!= sizeof (lwpxstatus_t
)
6494 memcpy (&lwpstat
, note
->descdata
, sizeof (lwpstat
));
6496 elf_tdata (abfd
)->core_lwpid
= lwpstat
.pr_lwpid
;
6497 elf_tdata (abfd
)->core_signal
= lwpstat
.pr_cursig
;
6499 /* Make a ".reg/999" section. */
6501 sprintf (buf
, ".reg/%d", elfcore_make_pid (abfd
));
6502 name
= bfd_alloc (abfd
, (bfd_size_type
) strlen (buf
) + 1);
6507 sect
= bfd_make_section (abfd
, name
);
6511 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
6512 sect
->_raw_size
= sizeof (lwpstat
.pr_context
.uc_mcontext
.gregs
);
6513 sect
->filepos
= note
->descpos
6514 + offsetof (lwpstatus_t
, pr_context
.uc_mcontext
.gregs
);
6517 #if defined (HAVE_LWPSTATUS_T_PR_REG)
6518 sect
->_raw_size
= sizeof (lwpstat
.pr_reg
);
6519 sect
->filepos
= note
->descpos
+ offsetof (lwpstatus_t
, pr_reg
);
6522 sect
->flags
= SEC_HAS_CONTENTS
;
6523 sect
->alignment_power
= 2;
6525 if (!elfcore_maybe_make_sect (abfd
, ".reg", sect
))
6528 /* Make a ".reg2/999" section */
6530 sprintf (buf
, ".reg2/%d", elfcore_make_pid (abfd
));
6531 name
= bfd_alloc (abfd
, (bfd_size_type
) strlen (buf
) + 1);
6536 sect
= bfd_make_section (abfd
, name
);
6540 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
6541 sect
->_raw_size
= sizeof (lwpstat
.pr_context
.uc_mcontext
.fpregs
);
6542 sect
->filepos
= note
->descpos
6543 + offsetof (lwpstatus_t
, pr_context
.uc_mcontext
.fpregs
);
6546 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
6547 sect
->_raw_size
= sizeof (lwpstat
.pr_fpreg
);
6548 sect
->filepos
= note
->descpos
+ offsetof (lwpstatus_t
, pr_fpreg
);
6551 sect
->flags
= SEC_HAS_CONTENTS
;
6552 sect
->alignment_power
= 2;
6554 return elfcore_maybe_make_sect (abfd
, ".reg2", sect
);
6556 #endif /* defined (HAVE_LWPSTATUS_T) */
6558 #if defined (HAVE_WIN32_PSTATUS_T)
6560 elfcore_grok_win32pstatus (abfd
, note
)
6562 Elf_Internal_Note
*note
;
6567 win32_pstatus_t pstatus
;
6569 if (note
->descsz
< sizeof (pstatus
))
6572 memcpy (&pstatus
, note
->descdata
, sizeof (pstatus
));
6574 switch (pstatus
.data_type
)
6576 case NOTE_INFO_PROCESS
:
6577 /* FIXME: need to add ->core_command. */
6578 elf_tdata (abfd
)->core_signal
= pstatus
.data
.process_info
.signal
;
6579 elf_tdata (abfd
)->core_pid
= pstatus
.data
.process_info
.pid
;
6582 case NOTE_INFO_THREAD
:
6583 /* Make a ".reg/999" section. */
6584 sprintf (buf
, ".reg/%d", pstatus
.data
.thread_info
.tid
);
6586 name
= bfd_alloc (abfd
, (bfd_size_type
) strlen (buf
) + 1);
6592 sect
= bfd_make_section (abfd
, name
);
6596 sect
->_raw_size
= sizeof (pstatus
.data
.thread_info
.thread_context
);
6597 sect
->filepos
= (note
->descpos
6598 + offsetof (struct win32_pstatus
,
6599 data
.thread_info
.thread_context
));
6600 sect
->flags
= SEC_HAS_CONTENTS
;
6601 sect
->alignment_power
= 2;
6603 if (pstatus
.data
.thread_info
.is_active_thread
)
6604 if (! elfcore_maybe_make_sect (abfd
, ".reg", sect
))
6608 case NOTE_INFO_MODULE
:
6609 /* Make a ".module/xxxxxxxx" section. */
6610 sprintf (buf
, ".module/%08x", pstatus
.data
.module_info
.base_address
);
6612 name
= bfd_alloc (abfd
, (bfd_size_type
) strlen (buf
) + 1);
6618 sect
= bfd_make_section (abfd
, name
);
6623 sect
->_raw_size
= note
->descsz
;
6624 sect
->filepos
= note
->descpos
;
6625 sect
->flags
= SEC_HAS_CONTENTS
;
6626 sect
->alignment_power
= 2;
6635 #endif /* HAVE_WIN32_PSTATUS_T */
6638 elfcore_grok_note (abfd
, note
)
6640 Elf_Internal_Note
*note
;
6642 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
6650 if (bed
->elf_backend_grok_prstatus
)
6651 if ((*bed
->elf_backend_grok_prstatus
) (abfd
, note
))
6653 #if defined (HAVE_PRSTATUS_T)
6654 return elfcore_grok_prstatus (abfd
, note
);
6659 #if defined (HAVE_PSTATUS_T)
6661 return elfcore_grok_pstatus (abfd
, note
);
6664 #if defined (HAVE_LWPSTATUS_T)
6666 return elfcore_grok_lwpstatus (abfd
, note
);
6669 case NT_FPREGSET
: /* FIXME: rename to NT_PRFPREG */
6670 return elfcore_grok_prfpreg (abfd
, note
);
6672 #if defined (HAVE_WIN32_PSTATUS_T)
6673 case NT_WIN32PSTATUS
:
6674 return elfcore_grok_win32pstatus (abfd
, note
);
6677 case NT_PRXFPREG
: /* Linux SSE extension */
6678 if (note
->namesz
== 5
6679 && ! strcmp (note
->namedata
, "LINUX"))
6680 return elfcore_grok_prxfpreg (abfd
, note
);
6686 if (bed
->elf_backend_grok_psinfo
)
6687 if ((*bed
->elf_backend_grok_psinfo
) (abfd
, note
))
6689 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
6690 return elfcore_grok_psinfo (abfd
, note
);
6698 elfcore_netbsd_get_lwpid (note
, lwpidp
)
6699 Elf_Internal_Note
*note
;
6704 cp
= strchr (note
->namedata
, '@');
6707 *lwpidp
= atoi(cp
+ 1);
6714 elfcore_grok_netbsd_procinfo (abfd
, note
)
6716 Elf_Internal_Note
*note
;
6719 /* Signal number at offset 0x08. */
6720 elf_tdata (abfd
)->core_signal
6721 = bfd_h_get_32 (abfd
, (bfd_byte
*) note
->descdata
+ 0x08);
6723 /* Process ID at offset 0x50. */
6724 elf_tdata (abfd
)->core_pid
6725 = bfd_h_get_32 (abfd
, (bfd_byte
*) note
->descdata
+ 0x50);
6727 /* Command name at 0x7c (max 32 bytes, including nul). */
6728 elf_tdata (abfd
)->core_command
6729 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 0x7c, 31);
6735 elfcore_grok_netbsd_note (abfd
, note
)
6737 Elf_Internal_Note
*note
;
6741 if (elfcore_netbsd_get_lwpid (note
, &lwp
))
6742 elf_tdata (abfd
)->core_lwpid
= lwp
;
6744 if (note
->type
== NT_NETBSDCORE_PROCINFO
)
6746 /* NetBSD-specific core "procinfo". Note that we expect to
6747 find this note before any of the others, which is fine,
6748 since the kernel writes this note out first when it
6749 creates a core file. */
6751 return elfcore_grok_netbsd_procinfo (abfd
, note
);
6754 /* As of Jan 2002 there are no other machine-independent notes
6755 defined for NetBSD core files. If the note type is less
6756 than the start of the machine-dependent note types, we don't
6759 if (note
->type
< NT_NETBSDCORE_FIRSTMACH
)
6763 switch (bfd_get_arch (abfd
))
6765 /* On the Alpha, SPARC (32-bit and 64-bit), PT_GETREGS == mach+0 and
6766 PT_GETFPREGS == mach+2. */
6768 case bfd_arch_alpha
:
6769 case bfd_arch_sparc
:
6772 case NT_NETBSDCORE_FIRSTMACH
+0:
6773 return elfcore_make_note_pseudosection (abfd
, ".reg", note
);
6775 case NT_NETBSDCORE_FIRSTMACH
+2:
6776 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
6782 /* On all other arch's, PT_GETREGS == mach+1 and
6783 PT_GETFPREGS == mach+3. */
6788 case NT_NETBSDCORE_FIRSTMACH
+1:
6789 return elfcore_make_note_pseudosection (abfd
, ".reg", note
);
6791 case NT_NETBSDCORE_FIRSTMACH
+3:
6792 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
6801 /* Function: elfcore_write_note
6808 size of data for note
6811 End of buffer containing note. */
6814 elfcore_write_note (abfd
, buf
, bufsiz
, name
, type
, input
, size
)
6823 Elf_External_Note
*xnp
;
6824 int namesz
= strlen (name
);
6825 int newspace
= BFD_ALIGN (sizeof (Elf_External_Note
) + size
+ namesz
- 1, 4);
6828 p
= realloc (buf
, *bufsiz
+ newspace
);
6830 *bufsiz
+= newspace
;
6831 xnp
= (Elf_External_Note
*) dest
;
6832 H_PUT_32 (abfd
, namesz
, xnp
->namesz
);
6833 H_PUT_32 (abfd
, size
, xnp
->descsz
);
6834 H_PUT_32 (abfd
, type
, xnp
->type
);
6835 strcpy (xnp
->name
, name
);
6836 memcpy (xnp
->name
+ BFD_ALIGN (namesz
, 4), input
, size
);
6840 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
6842 elfcore_write_prpsinfo (abfd
, buf
, bufsiz
, fname
, psargs
)
6850 char *note_name
= "CORE";
6852 #if defined (HAVE_PSINFO_T)
6854 note_type
= NT_PSINFO
;
6857 note_type
= NT_PRPSINFO
;
6860 memset (&data
, 0, sizeof (data
));
6861 strncpy (data
.pr_fname
, fname
, sizeof (data
.pr_fname
));
6862 strncpy (data
.pr_psargs
, psargs
, sizeof (data
.pr_psargs
));
6863 return elfcore_write_note (abfd
, buf
, bufsiz
,
6864 note_name
, note_type
, &data
, sizeof (data
));
6866 #endif /* PSINFO_T or PRPSINFO_T */
6868 #if defined (HAVE_PRSTATUS_T)
6870 elfcore_write_prstatus (abfd
, buf
, bufsiz
, pid
, cursig
, gregs
)
6879 char *note_name
= "CORE";
6881 memset (&prstat
, 0, sizeof (prstat
));
6882 prstat
.pr_pid
= pid
;
6883 prstat
.pr_cursig
= cursig
;
6884 memcpy (&prstat
.pr_reg
, gregs
, sizeof (prstat
.pr_reg
));
6885 return elfcore_write_note (abfd
, buf
, bufsiz
,
6886 note_name
, NT_PRSTATUS
, &prstat
, sizeof (prstat
));
6888 #endif /* HAVE_PRSTATUS_T */
6890 #if defined (HAVE_LWPSTATUS_T)
6892 elfcore_write_lwpstatus (abfd
, buf
, bufsiz
, pid
, cursig
, gregs
)
6900 lwpstatus_t lwpstat
;
6901 char *note_name
= "CORE";
6903 memset (&lwpstat
, 0, sizeof (lwpstat
));
6904 lwpstat
.pr_lwpid
= pid
>> 16;
6905 lwpstat
.pr_cursig
= cursig
;
6906 #if defined (HAVE_LWPSTATUS_T_PR_REG)
6907 memcpy (lwpstat
.pr_reg
, gregs
, sizeof (lwpstat
.pr_reg
));
6908 #elif defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
6910 memcpy (lwpstat
.pr_context
.uc_mcontext
.gregs
,
6911 gregs
, sizeof (lwpstat
.pr_context
.uc_mcontext
.gregs
));
6913 memcpy (lwpstat
.pr_context
.uc_mcontext
.__gregs
,
6914 gregs
, sizeof (lwpstat
.pr_context
.uc_mcontext
.__gregs
));
6917 return elfcore_write_note (abfd
, buf
, bufsiz
, note_name
,
6918 NT_LWPSTATUS
, &lwpstat
, sizeof (lwpstat
));
6920 #endif /* HAVE_LWPSTATUS_T */
6922 #if defined (HAVE_PSTATUS_T)
6924 elfcore_write_pstatus (abfd
, buf
, bufsiz
, pid
, cursig
, gregs
)
6933 char *note_name
= "CORE";
6935 memset (&pstat
, 0, sizeof (pstat
));
6936 pstat
.pr_pid
= pid
& 0xffff;
6937 buf
= elfcore_write_note (abfd
, buf
, bufsiz
, note_name
,
6938 NT_PSTATUS
, &pstat
, sizeof (pstat
));
6941 #endif /* HAVE_PSTATUS_T */
6944 elfcore_write_prfpreg (abfd
, buf
, bufsiz
, fpregs
, size
)
6951 char *note_name
= "CORE";
6952 return elfcore_write_note (abfd
, buf
, bufsiz
,
6953 note_name
, NT_FPREGSET
, fpregs
, size
);
6957 elfcore_write_prxfpreg (abfd
, buf
, bufsiz
, xfpregs
, size
)
6964 char *note_name
= "LINUX";
6965 return elfcore_write_note (abfd
, buf
, bufsiz
,
6966 note_name
, NT_PRXFPREG
, xfpregs
, size
);
6970 elfcore_read_notes (abfd
, offset
, size
)
6981 if (bfd_seek (abfd
, offset
, SEEK_SET
) != 0)
6984 buf
= bfd_malloc (size
);
6988 if (bfd_bread (buf
, size
, abfd
) != size
)
6996 while (p
< buf
+ size
)
6998 /* FIXME: bad alignment assumption. */
6999 Elf_External_Note
*xnp
= (Elf_External_Note
*) p
;
7000 Elf_Internal_Note in
;
7002 in
.type
= H_GET_32 (abfd
, xnp
->type
);
7004 in
.namesz
= H_GET_32 (abfd
, xnp
->namesz
);
7005 in
.namedata
= xnp
->name
;
7007 in
.descsz
= H_GET_32 (abfd
, xnp
->descsz
);
7008 in
.descdata
= in
.namedata
+ BFD_ALIGN (in
.namesz
, 4);
7009 in
.descpos
= offset
+ (in
.descdata
- buf
);
7011 if (strncmp (in
.namedata
, "NetBSD-CORE", 11) == 0)
7013 if (! elfcore_grok_netbsd_note (abfd
, &in
))
7018 if (! elfcore_grok_note (abfd
, &in
))
7022 p
= in
.descdata
+ BFD_ALIGN (in
.descsz
, 4);
7029 /* Providing external access to the ELF program header table. */
7031 /* Return an upper bound on the number of bytes required to store a
7032 copy of ABFD's program header table entries. Return -1 if an error
7033 occurs; bfd_get_error will return an appropriate code. */
7036 bfd_get_elf_phdr_upper_bound (abfd
)
7039 if (abfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
7041 bfd_set_error (bfd_error_wrong_format
);
7045 return elf_elfheader (abfd
)->e_phnum
* sizeof (Elf_Internal_Phdr
);
7048 /* Copy ABFD's program header table entries to *PHDRS. The entries
7049 will be stored as an array of Elf_Internal_Phdr structures, as
7050 defined in include/elf/internal.h. To find out how large the
7051 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
7053 Return the number of program header table entries read, or -1 if an
7054 error occurs; bfd_get_error will return an appropriate code. */
7057 bfd_get_elf_phdrs (abfd
, phdrs
)
7063 if (abfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
7065 bfd_set_error (bfd_error_wrong_format
);
7069 num_phdrs
= elf_elfheader (abfd
)->e_phnum
;
7070 memcpy (phdrs
, elf_tdata (abfd
)->phdr
,
7071 num_phdrs
* sizeof (Elf_Internal_Phdr
));
7077 _bfd_elf_sprintf_vma (abfd
, buf
, value
)
7078 bfd
*abfd ATTRIBUTE_UNUSED
;
7083 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
7085 i_ehdrp
= elf_elfheader (abfd
);
7086 if (i_ehdrp
== NULL
)
7087 sprintf_vma (buf
, value
);
7090 if (i_ehdrp
->e_ident
[EI_CLASS
] == ELFCLASS64
)
7092 #if BFD_HOST_64BIT_LONG
7093 sprintf (buf
, "%016lx", value
);
7095 sprintf (buf
, "%08lx%08lx", _bfd_int64_high (value
),
7096 _bfd_int64_low (value
));
7100 sprintf (buf
, "%08lx", (unsigned long) (value
& 0xffffffff));
7103 sprintf_vma (buf
, value
);
7108 _bfd_elf_fprintf_vma (abfd
, stream
, value
)
7109 bfd
*abfd ATTRIBUTE_UNUSED
;
7114 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
7116 i_ehdrp
= elf_elfheader (abfd
);
7117 if (i_ehdrp
== NULL
)
7118 fprintf_vma ((FILE *) stream
, value
);
7121 if (i_ehdrp
->e_ident
[EI_CLASS
] == ELFCLASS64
)
7123 #if BFD_HOST_64BIT_LONG
7124 fprintf ((FILE *) stream
, "%016lx", value
);
7126 fprintf ((FILE *) stream
, "%08lx%08lx",
7127 _bfd_int64_high (value
), _bfd_int64_low (value
));
7131 fprintf ((FILE *) stream
, "%08lx",
7132 (unsigned long) (value
& 0xffffffff));
7135 fprintf_vma ((FILE *) stream
, value
);
7139 enum elf_reloc_type_class
7140 _bfd_elf_reloc_type_class (rela
)
7141 const Elf_Internal_Rela
*rela ATTRIBUTE_UNUSED
;
7143 return reloc_class_normal
;
7146 /* For RELA architectures, return what the relocation value for
7147 relocation against a local symbol. */
7150 _bfd_elf_rela_local_sym (abfd
, sym
, sec
, rel
)
7152 Elf_Internal_Sym
*sym
;
7154 Elf_Internal_Rela
*rel
;
7158 relocation
= (sec
->output_section
->vma
7159 + sec
->output_offset
7161 if ((sec
->flags
& SEC_MERGE
)
7162 && ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
7163 && elf_section_data (sec
)->sec_info_type
== ELF_INFO_TYPE_MERGE
)
7169 _bfd_merged_section_offset (abfd
, &msec
,
7170 elf_section_data (sec
)->sec_info
,
7171 sym
->st_value
+ rel
->r_addend
,
7174 rel
->r_addend
+= msec
->output_section
->vma
+ msec
->output_offset
;
7180 _bfd_elf_rel_local_sym (abfd
, sym
, psec
, addend
)
7182 Elf_Internal_Sym
*sym
;
7186 asection
*sec
= *psec
;
7188 if (elf_section_data (sec
)->sec_info_type
!= ELF_INFO_TYPE_MERGE
)
7189 return sym
->st_value
+ addend
;
7191 return _bfd_merged_section_offset (abfd
, psec
,
7192 elf_section_data (sec
)->sec_info
,
7193 sym
->st_value
+ addend
, (bfd_vma
) 0);
7197 _bfd_elf_section_offset (abfd
, info
, sec
, offset
)
7199 struct bfd_link_info
*info
;
7203 struct bfd_elf_section_data
*sec_data
;
7205 sec_data
= elf_section_data (sec
);
7206 switch (sec_data
->sec_info_type
)
7208 case ELF_INFO_TYPE_STABS
:
7209 return _bfd_stab_section_offset
7210 (abfd
, &elf_hash_table (info
)->merge_info
, sec
, &sec_data
->sec_info
,
7212 case ELF_INFO_TYPE_EH_FRAME
:
7213 return _bfd_elf_eh_frame_section_offset (abfd
, sec
, offset
);