1 /* ELF executable support for BFD.
2 Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001
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. */
26 BFD support for ELF formats is being worked on.
27 Currently, the best supported back ends are for sparc and i386
28 (running svr4 or Solaris 2).
30 Documentation of the internals of the support code still needs
31 to be written. The code is changing quickly enough that we
35 /* For sparc64-cross-sparc32. */
43 #include "libiberty.h"
45 static INLINE
struct elf_segment_map
*make_mapping
46 PARAMS ((bfd
*, asection
**, unsigned int, unsigned int, boolean
));
47 static boolean map_sections_to_segments
PARAMS ((bfd
*));
48 static int elf_sort_sections
PARAMS ((const PTR
, const PTR
));
49 static boolean assign_file_positions_for_segments
PARAMS ((bfd
*));
50 static boolean assign_file_positions_except_relocs
PARAMS ((bfd
*));
51 static boolean prep_headers
PARAMS ((bfd
*));
52 static boolean swap_out_syms
PARAMS ((bfd
*, struct bfd_strtab_hash
**, int));
53 static boolean copy_private_bfd_data
PARAMS ((bfd
*, bfd
*));
54 static char *elf_read
PARAMS ((bfd
*, file_ptr
, bfd_size_type
));
55 static boolean setup_group
PARAMS ((bfd
*, Elf_Internal_Shdr
*, asection
*));
56 static void elf_fake_sections
PARAMS ((bfd
*, asection
*, PTR
));
57 static void set_group_contents
PARAMS ((bfd
*, asection
*, PTR
));
58 static boolean assign_section_numbers
PARAMS ((bfd
*));
59 static INLINE
int sym_is_global
PARAMS ((bfd
*, asymbol
*));
60 static boolean elf_map_symbols
PARAMS ((bfd
*));
61 static bfd_size_type get_program_header_size
PARAMS ((bfd
*));
62 static boolean elfcore_read_notes
PARAMS ((bfd
*, file_ptr
, bfd_size_type
));
63 static boolean elf_find_function
PARAMS ((bfd
*, asection
*, asymbol
**,
64 bfd_vma
, const char **,
66 static int elfcore_make_pid
PARAMS ((bfd
*));
67 static boolean elfcore_maybe_make_sect
PARAMS ((bfd
*, char *, asection
*));
68 static boolean elfcore_make_note_pseudosection
PARAMS ((bfd
*, char *,
69 Elf_Internal_Note
*));
70 static boolean elfcore_grok_prfpreg
PARAMS ((bfd
*, Elf_Internal_Note
*));
71 static boolean elfcore_grok_prxfpreg
PARAMS ((bfd
*, Elf_Internal_Note
*));
72 static boolean elfcore_grok_note
PARAMS ((bfd
*, Elf_Internal_Note
*));
74 static boolean elfcore_netbsd_get_lwpid
PARAMS ((Elf_Internal_Note
*, int *));
75 static boolean elfcore_grok_netbsd_procinfo
PARAMS ((bfd
*,
76 Elf_Internal_Note
*));
77 static boolean elfcore_grok_netbsd_note
PARAMS ((bfd
*, Elf_Internal_Note
*));
79 /* Swap version information in and out. The version information is
80 currently size independent. If that ever changes, this code will
81 need to move into elfcode.h. */
83 /* Swap in a Verdef structure. */
86 _bfd_elf_swap_verdef_in (abfd
, src
, dst
)
88 const Elf_External_Verdef
*src
;
89 Elf_Internal_Verdef
*dst
;
91 dst
->vd_version
= H_GET_16 (abfd
, src
->vd_version
);
92 dst
->vd_flags
= H_GET_16 (abfd
, src
->vd_flags
);
93 dst
->vd_ndx
= H_GET_16 (abfd
, src
->vd_ndx
);
94 dst
->vd_cnt
= H_GET_16 (abfd
, src
->vd_cnt
);
95 dst
->vd_hash
= H_GET_32 (abfd
, src
->vd_hash
);
96 dst
->vd_aux
= H_GET_32 (abfd
, src
->vd_aux
);
97 dst
->vd_next
= H_GET_32 (abfd
, src
->vd_next
);
100 /* Swap out a Verdef structure. */
103 _bfd_elf_swap_verdef_out (abfd
, src
, dst
)
105 const Elf_Internal_Verdef
*src
;
106 Elf_External_Verdef
*dst
;
108 H_PUT_16 (abfd
, src
->vd_version
, dst
->vd_version
);
109 H_PUT_16 (abfd
, src
->vd_flags
, dst
->vd_flags
);
110 H_PUT_16 (abfd
, src
->vd_ndx
, dst
->vd_ndx
);
111 H_PUT_16 (abfd
, src
->vd_cnt
, dst
->vd_cnt
);
112 H_PUT_32 (abfd
, src
->vd_hash
, dst
->vd_hash
);
113 H_PUT_32 (abfd
, src
->vd_aux
, dst
->vd_aux
);
114 H_PUT_32 (abfd
, src
->vd_next
, dst
->vd_next
);
117 /* Swap in a Verdaux structure. */
120 _bfd_elf_swap_verdaux_in (abfd
, src
, dst
)
122 const Elf_External_Verdaux
*src
;
123 Elf_Internal_Verdaux
*dst
;
125 dst
->vda_name
= H_GET_32 (abfd
, src
->vda_name
);
126 dst
->vda_next
= H_GET_32 (abfd
, src
->vda_next
);
129 /* Swap out a Verdaux structure. */
132 _bfd_elf_swap_verdaux_out (abfd
, src
, dst
)
134 const Elf_Internal_Verdaux
*src
;
135 Elf_External_Verdaux
*dst
;
137 H_PUT_32 (abfd
, src
->vda_name
, dst
->vda_name
);
138 H_PUT_32 (abfd
, src
->vda_next
, dst
->vda_next
);
141 /* Swap in a Verneed structure. */
144 _bfd_elf_swap_verneed_in (abfd
, src
, dst
)
146 const Elf_External_Verneed
*src
;
147 Elf_Internal_Verneed
*dst
;
149 dst
->vn_version
= H_GET_16 (abfd
, src
->vn_version
);
150 dst
->vn_cnt
= H_GET_16 (abfd
, src
->vn_cnt
);
151 dst
->vn_file
= H_GET_32 (abfd
, src
->vn_file
);
152 dst
->vn_aux
= H_GET_32 (abfd
, src
->vn_aux
);
153 dst
->vn_next
= H_GET_32 (abfd
, src
->vn_next
);
156 /* Swap out a Verneed structure. */
159 _bfd_elf_swap_verneed_out (abfd
, src
, dst
)
161 const Elf_Internal_Verneed
*src
;
162 Elf_External_Verneed
*dst
;
164 H_PUT_16 (abfd
, src
->vn_version
, dst
->vn_version
);
165 H_PUT_16 (abfd
, src
->vn_cnt
, dst
->vn_cnt
);
166 H_PUT_32 (abfd
, src
->vn_file
, dst
->vn_file
);
167 H_PUT_32 (abfd
, src
->vn_aux
, dst
->vn_aux
);
168 H_PUT_32 (abfd
, src
->vn_next
, dst
->vn_next
);
171 /* Swap in a Vernaux structure. */
174 _bfd_elf_swap_vernaux_in (abfd
, src
, dst
)
176 const Elf_External_Vernaux
*src
;
177 Elf_Internal_Vernaux
*dst
;
179 dst
->vna_hash
= H_GET_32 (abfd
, src
->vna_hash
);
180 dst
->vna_flags
= H_GET_16 (abfd
, src
->vna_flags
);
181 dst
->vna_other
= H_GET_16 (abfd
, src
->vna_other
);
182 dst
->vna_name
= H_GET_32 (abfd
, src
->vna_name
);
183 dst
->vna_next
= H_GET_32 (abfd
, src
->vna_next
);
186 /* Swap out a Vernaux structure. */
189 _bfd_elf_swap_vernaux_out (abfd
, src
, dst
)
191 const Elf_Internal_Vernaux
*src
;
192 Elf_External_Vernaux
*dst
;
194 H_PUT_32 (abfd
, src
->vna_hash
, dst
->vna_hash
);
195 H_PUT_16 (abfd
, src
->vna_flags
, dst
->vna_flags
);
196 H_PUT_16 (abfd
, src
->vna_other
, dst
->vna_other
);
197 H_PUT_32 (abfd
, src
->vna_name
, dst
->vna_name
);
198 H_PUT_32 (abfd
, src
->vna_next
, dst
->vna_next
);
201 /* Swap in a Versym structure. */
204 _bfd_elf_swap_versym_in (abfd
, src
, dst
)
206 const Elf_External_Versym
*src
;
207 Elf_Internal_Versym
*dst
;
209 dst
->vs_vers
= H_GET_16 (abfd
, src
->vs_vers
);
212 /* Swap out a Versym structure. */
215 _bfd_elf_swap_versym_out (abfd
, src
, dst
)
217 const Elf_Internal_Versym
*src
;
218 Elf_External_Versym
*dst
;
220 H_PUT_16 (abfd
, src
->vs_vers
, dst
->vs_vers
);
223 /* Standard ELF hash function. Do not change this function; you will
224 cause invalid hash tables to be generated. */
227 bfd_elf_hash (namearg
)
230 const unsigned char *name
= (const unsigned char *) namearg
;
235 while ((ch
= *name
++) != '\0')
238 if ((g
= (h
& 0xf0000000)) != 0)
241 /* The ELF ABI says `h &= ~g', but this is equivalent in
242 this case and on some machines one insn instead of two. */
249 /* Read a specified number of bytes at a specified offset in an ELF
250 file, into a newly allocated buffer, and return a pointer to the
254 elf_read (abfd
, offset
, size
)
261 if ((buf
= bfd_alloc (abfd
, size
)) == NULL
)
263 if (bfd_seek (abfd
, offset
, SEEK_SET
) != 0)
265 if (bfd_bread ((PTR
) buf
, size
, abfd
) != size
)
267 if (bfd_get_error () != bfd_error_system_call
)
268 bfd_set_error (bfd_error_file_truncated
);
275 bfd_elf_mkobject (abfd
)
278 /* This just does initialization. */
279 /* coff_mkobject zalloc's space for tdata.coff_obj_data ... */
280 bfd_size_type amt
= sizeof (struct elf_obj_tdata
);
281 elf_tdata (abfd
) = (struct elf_obj_tdata
*) bfd_zalloc (abfd
, amt
);
282 if (elf_tdata (abfd
) == 0)
284 /* Since everything is done at close time, do we need any
291 bfd_elf_mkcorefile (abfd
)
294 /* I think this can be done just like an object file. */
295 return bfd_elf_mkobject (abfd
);
299 bfd_elf_get_str_section (abfd
, shindex
)
301 unsigned int shindex
;
303 Elf_Internal_Shdr
**i_shdrp
;
304 char *shstrtab
= NULL
;
306 bfd_size_type shstrtabsize
;
308 i_shdrp
= elf_elfsections (abfd
);
309 if (i_shdrp
== 0 || i_shdrp
[shindex
] == 0)
312 shstrtab
= (char *) i_shdrp
[shindex
]->contents
;
313 if (shstrtab
== NULL
)
315 /* No cached one, attempt to read, and cache what we read. */
316 offset
= i_shdrp
[shindex
]->sh_offset
;
317 shstrtabsize
= i_shdrp
[shindex
]->sh_size
;
318 shstrtab
= elf_read (abfd
, offset
, shstrtabsize
);
319 i_shdrp
[shindex
]->contents
= (PTR
) shstrtab
;
325 bfd_elf_string_from_elf_section (abfd
, shindex
, strindex
)
327 unsigned int shindex
;
328 unsigned int strindex
;
330 Elf_Internal_Shdr
*hdr
;
335 hdr
= elf_elfsections (abfd
)[shindex
];
337 if (hdr
->contents
== NULL
338 && bfd_elf_get_str_section (abfd
, shindex
) == NULL
)
341 if (strindex
>= hdr
->sh_size
)
343 (*_bfd_error_handler
)
344 (_("%s: invalid string offset %u >= %lu for section `%s'"),
345 bfd_archive_filename (abfd
), strindex
, (unsigned long) hdr
->sh_size
,
346 ((shindex
== elf_elfheader(abfd
)->e_shstrndx
347 && strindex
== hdr
->sh_name
)
349 : elf_string_from_elf_strtab (abfd
, hdr
->sh_name
)));
353 return ((char *) hdr
->contents
) + strindex
;
356 /* Elf_Internal_Shdr->contents is an array of these for SHT_GROUP
357 sections. The first element is the flags, the rest are section
360 typedef union elf_internal_group
{
361 Elf_Internal_Shdr
*shdr
;
363 } Elf_Internal_Group
;
365 /* Set next_in_group list pointer, and group name for NEWSECT. */
368 setup_group (abfd
, hdr
, newsect
)
370 Elf_Internal_Shdr
*hdr
;
373 unsigned int num_group
= elf_tdata (abfd
)->num_group
;
375 /* If num_group is zero, read in all SHT_GROUP sections. The count
376 is set to -1 if there are no SHT_GROUP sections. */
379 unsigned int i
, shnum
;
381 /* First count the number of groups. If we have a SHT_GROUP
382 section with just a flag word (ie. sh_size is 4), ignore it. */
383 shnum
= elf_numsections (abfd
);
385 for (i
= 0; i
< shnum
; i
++)
387 Elf_Internal_Shdr
*shdr
= elf_elfsections (abfd
)[i
];
388 if (shdr
->sh_type
== SHT_GROUP
&& shdr
->sh_size
>= 8)
393 num_group
= (unsigned) -1;
394 elf_tdata (abfd
)->num_group
= num_group
;
398 /* We keep a list of elf section headers for group sections,
399 so we can find them quickly. */
400 bfd_size_type amt
= num_group
* sizeof (Elf_Internal_Shdr
*);
401 elf_tdata (abfd
)->group_sect_ptr
= bfd_alloc (abfd
, amt
);
402 if (elf_tdata (abfd
)->group_sect_ptr
== NULL
)
406 for (i
= 0; i
< shnum
; i
++)
408 Elf_Internal_Shdr
*shdr
= elf_elfsections (abfd
)[i
];
409 if (shdr
->sh_type
== SHT_GROUP
&& shdr
->sh_size
>= 8)
412 Elf_Internal_Group
*dest
;
414 /* Add to list of sections. */
415 elf_tdata (abfd
)->group_sect_ptr
[num_group
] = shdr
;
418 /* Read the raw contents. */
419 BFD_ASSERT (sizeof (*dest
) >= 4);
420 amt
= shdr
->sh_size
* sizeof (*dest
) / 4;
421 shdr
->contents
= bfd_alloc (abfd
, amt
);
422 if (shdr
->contents
== NULL
423 || bfd_seek (abfd
, shdr
->sh_offset
, SEEK_SET
) != 0
424 || (bfd_bread (shdr
->contents
, shdr
->sh_size
, abfd
)
428 /* Translate raw contents, a flag word followed by an
429 array of elf section indices all in target byte order,
430 to the flag word followed by an array of elf section
432 src
= shdr
->contents
+ shdr
->sh_size
;
433 dest
= (Elf_Internal_Group
*) (shdr
->contents
+ amt
);
440 idx
= H_GET_32 (abfd
, src
);
441 if (src
== shdr
->contents
)
448 ((*_bfd_error_handler
)
449 (_("%s: invalid SHT_GROUP entry"),
450 bfd_archive_filename (abfd
)));
453 dest
->shdr
= elf_elfsections (abfd
)[idx
];
460 if (num_group
!= (unsigned) -1)
464 for (i
= 0; i
< num_group
; i
++)
466 Elf_Internal_Shdr
*shdr
= elf_tdata (abfd
)->group_sect_ptr
[i
];
467 Elf_Internal_Group
*idx
= (Elf_Internal_Group
*) shdr
->contents
;
468 unsigned int n_elt
= shdr
->sh_size
/ 4;
470 /* Look through this group's sections to see if current
471 section is a member. */
473 if ((++idx
)->shdr
== hdr
)
477 /* We are a member of this group. Go looking through
478 other members to see if any others are linked via
480 idx
= (Elf_Internal_Group
*) shdr
->contents
;
481 n_elt
= shdr
->sh_size
/ 4;
483 if ((s
= (++idx
)->shdr
->bfd_section
) != NULL
484 && elf_next_in_group (s
) != NULL
)
488 /* Snarf the group name from other member, and
489 insert current section in circular list. */
490 elf_group_name (newsect
) = elf_group_name (s
);
491 elf_next_in_group (newsect
) = elf_next_in_group (s
);
492 elf_next_in_group (s
) = newsect
;
496 struct elf_backend_data
*bed
;
498 unsigned char ename
[4];
502 /* Humbug. Get the name from the group signature
503 symbol. Why isn't the signature just a string?
504 Fortunately, the name index is at the same
505 place in the external symbol for both 32 and 64
507 bed
= get_elf_backend_data (abfd
);
508 pos
= elf_tdata (abfd
)->symtab_hdr
.sh_offset
;
509 pos
+= shdr
->sh_info
* bed
->s
->sizeof_sym
;
510 if (bfd_seek (abfd
, pos
, SEEK_SET
) != 0
511 || bfd_bread (ename
, (bfd_size_type
) 4, abfd
) != 4)
513 iname
= H_GET_32 (abfd
, ename
);
514 gname
= elf_string_from_elf_strtab (abfd
, iname
);
515 elf_group_name (newsect
) = gname
;
517 /* Start a circular list with one element. */
518 elf_next_in_group (newsect
) = newsect
;
520 if (shdr
->bfd_section
!= NULL
)
521 elf_next_in_group (shdr
->bfd_section
) = newsect
;
528 if (elf_group_name (newsect
) == NULL
)
530 (*_bfd_error_handler
) (_("%s: no group info for section %s"),
531 bfd_archive_filename (abfd
), newsect
->name
);
536 /* Make a BFD section from an ELF section. We store a pointer to the
537 BFD section in the bfd_section field of the header. */
540 _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
)
542 Elf_Internal_Shdr
*hdr
;
547 struct elf_backend_data
*bed
;
549 if (hdr
->bfd_section
!= NULL
)
551 BFD_ASSERT (strcmp (name
,
552 bfd_get_section_name (abfd
, hdr
->bfd_section
)) == 0);
556 newsect
= bfd_make_section_anyway (abfd
, name
);
560 newsect
->filepos
= hdr
->sh_offset
;
562 if (! bfd_set_section_vma (abfd
, newsect
, hdr
->sh_addr
)
563 || ! bfd_set_section_size (abfd
, newsect
, hdr
->sh_size
)
564 || ! bfd_set_section_alignment (abfd
, newsect
,
565 bfd_log2 ((bfd_vma
) hdr
->sh_addralign
)))
568 flags
= SEC_NO_FLAGS
;
569 if (hdr
->sh_type
!= SHT_NOBITS
)
570 flags
|= SEC_HAS_CONTENTS
;
571 if (hdr
->sh_type
== SHT_GROUP
)
572 flags
|= SEC_GROUP
| SEC_EXCLUDE
;
573 if ((hdr
->sh_flags
& SHF_ALLOC
) != 0)
576 if (hdr
->sh_type
!= SHT_NOBITS
)
579 if ((hdr
->sh_flags
& SHF_WRITE
) == 0)
580 flags
|= SEC_READONLY
;
581 if ((hdr
->sh_flags
& SHF_EXECINSTR
) != 0)
583 else if ((flags
& SEC_LOAD
) != 0)
585 if ((hdr
->sh_flags
& SHF_MERGE
) != 0)
588 newsect
->entsize
= hdr
->sh_entsize
;
589 if ((hdr
->sh_flags
& SHF_STRINGS
) != 0)
590 flags
|= SEC_STRINGS
;
592 if (hdr
->sh_flags
& SHF_GROUP
)
593 if (!setup_group (abfd
, hdr
, newsect
))
596 /* The debugging sections appear to be recognized only by name, not
599 static const char *debug_sec_names
[] =
608 for (i
= ARRAY_SIZE (debug_sec_names
); i
--;)
609 if (strncmp (name
, debug_sec_names
[i
], strlen (debug_sec_names
[i
])) == 0)
613 flags
|= SEC_DEBUGGING
;
616 /* As a GNU extension, if the name begins with .gnu.linkonce, we
617 only link a single copy of the section. This is used to support
618 g++. g++ will emit each template expansion in its own section.
619 The symbols will be defined as weak, so that multiple definitions
620 are permitted. The GNU linker extension is to actually discard
621 all but one of the sections. */
622 if (strncmp (name
, ".gnu.linkonce", sizeof ".gnu.linkonce" - 1) == 0)
623 flags
|= SEC_LINK_ONCE
| SEC_LINK_DUPLICATES_DISCARD
;
625 bed
= get_elf_backend_data (abfd
);
626 if (bed
->elf_backend_section_flags
)
627 if (! bed
->elf_backend_section_flags (&flags
, hdr
))
630 if (! bfd_set_section_flags (abfd
, newsect
, flags
))
633 if ((flags
& SEC_ALLOC
) != 0)
635 Elf_Internal_Phdr
*phdr
;
638 /* Look through the phdrs to see if we need to adjust the lma.
639 If all the p_paddr fields are zero, we ignore them, since
640 some ELF linkers produce such output. */
641 phdr
= elf_tdata (abfd
)->phdr
;
642 for (i
= 0; i
< elf_elfheader (abfd
)->e_phnum
; i
++, phdr
++)
644 if (phdr
->p_paddr
!= 0)
647 if (i
< elf_elfheader (abfd
)->e_phnum
)
649 phdr
= elf_tdata (abfd
)->phdr
;
650 for (i
= 0; i
< elf_elfheader (abfd
)->e_phnum
; i
++, phdr
++)
652 /* This section is part of this segment if its file
653 offset plus size lies within the segment's memory
654 span and, if the section is loaded, the extent of the
655 loaded data lies within the extent of the segment.
656 If the p_paddr field is not set, we don't alter the
658 if (phdr
->p_type
== PT_LOAD
660 && (bfd_vma
) hdr
->sh_offset
>= phdr
->p_offset
661 && (hdr
->sh_offset
+ hdr
->sh_size
662 <= phdr
->p_offset
+ phdr
->p_memsz
)
663 && ((flags
& SEC_LOAD
) == 0
664 || (phdr
->p_offset
+ phdr
->p_filesz
665 >= hdr
->sh_offset
+ hdr
->sh_size
)))
667 /* We used to do a relative adjustment here, but
668 that doesn't work if the segment is packed with
669 code from multiple VMAs. Instead we calculate
670 the LMA absoultely, based on the LMA of the
671 segment (it is assumed that the segment will
672 contain sections with contiguous LMAs, even if
673 the VMAs are not). */
674 newsect
->lma
= phdr
->p_paddr
675 + hdr
->sh_offset
- phdr
->p_offset
;
682 hdr
->bfd_section
= newsect
;
683 elf_section_data (newsect
)->this_hdr
= *hdr
;
693 struct elf_internal_shdr *bfd_elf_find_section (bfd *abfd, char *name);
696 Helper functions for GDB to locate the string tables.
697 Since BFD hides string tables from callers, GDB needs to use an
698 internal hook to find them. Sun's .stabstr, in particular,
699 isn't even pointed to by the .stab section, so ordinary
700 mechanisms wouldn't work to find it, even if we had some.
703 struct elf_internal_shdr
*
704 bfd_elf_find_section (abfd
, name
)
708 Elf_Internal_Shdr
**i_shdrp
;
713 i_shdrp
= elf_elfsections (abfd
);
716 shstrtab
= bfd_elf_get_str_section (abfd
,
717 elf_elfheader (abfd
)->e_shstrndx
);
718 if (shstrtab
!= NULL
)
720 max
= elf_numsections (abfd
);
721 for (i
= 1; i
< max
; i
++)
722 if (!strcmp (&shstrtab
[i_shdrp
[i
]->sh_name
], name
))
729 const char *const bfd_elf_section_type_names
[] = {
730 "SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB",
731 "SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE",
732 "SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM",
735 /* ELF relocs are against symbols. If we are producing relocateable
736 output, and the reloc is against an external symbol, and nothing
737 has given us any additional addend, the resulting reloc will also
738 be against the same symbol. In such a case, we don't want to
739 change anything about the way the reloc is handled, since it will
740 all be done at final link time. Rather than put special case code
741 into bfd_perform_relocation, all the reloc types use this howto
742 function. It just short circuits the reloc if producing
743 relocateable output against an external symbol. */
745 bfd_reloc_status_type
746 bfd_elf_generic_reloc (abfd
,
753 bfd
*abfd ATTRIBUTE_UNUSED
;
754 arelent
*reloc_entry
;
756 PTR data ATTRIBUTE_UNUSED
;
757 asection
*input_section
;
759 char **error_message ATTRIBUTE_UNUSED
;
761 if (output_bfd
!= (bfd
*) NULL
762 && (symbol
->flags
& BSF_SECTION_SYM
) == 0
763 && (! reloc_entry
->howto
->partial_inplace
764 || reloc_entry
->addend
== 0))
766 reloc_entry
->address
+= input_section
->output_offset
;
770 return bfd_reloc_continue
;
773 /* Finish SHF_MERGE section merging. */
776 _bfd_elf_merge_sections (abfd
, info
)
778 struct bfd_link_info
*info
;
780 if (!is_elf_hash_table (info
))
782 if (elf_hash_table (info
)->merge_info
)
783 _bfd_merge_sections (abfd
, elf_hash_table (info
)->merge_info
);
787 /* Copy the program header from one object module to another */
790 _bfd_elf_copy_private_bfd_data (ibfd
, obfd
)
794 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
795 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
798 BFD_ASSERT (!elf_flags_init (obfd
)
799 || (elf_elfheader (obfd
)->e_flags
800 == elf_elfheader (ibfd
)->e_flags
));
802 elf_elfheader (obfd
)->e_flags
= elf_elfheader (ibfd
)->e_flags
;
803 elf_flags_init (obfd
) = true;
807 /* Print out the program headers. */
810 _bfd_elf_print_private_bfd_data (abfd
, farg
)
814 FILE *f
= (FILE *) farg
;
815 Elf_Internal_Phdr
*p
;
817 bfd_byte
*dynbuf
= NULL
;
819 p
= elf_tdata (abfd
)->phdr
;
824 fprintf (f
, _("\nProgram Header:\n"));
825 c
= elf_elfheader (abfd
)->e_phnum
;
826 for (i
= 0; i
< c
; i
++, p
++)
833 case PT_NULL
: pt
= "NULL"; break;
834 case PT_LOAD
: pt
= "LOAD"; break;
835 case PT_DYNAMIC
: pt
= "DYNAMIC"; break;
836 case PT_INTERP
: pt
= "INTERP"; break;
837 case PT_NOTE
: pt
= "NOTE"; break;
838 case PT_SHLIB
: pt
= "SHLIB"; break;
839 case PT_PHDR
: pt
= "PHDR"; break;
840 case PT_GNU_EH_FRAME
: pt
= "EH_FRAME"; break;
841 default: sprintf (buf
, "0x%lx", p
->p_type
); pt
= buf
; break;
843 fprintf (f
, "%8s off 0x", pt
);
844 bfd_fprintf_vma (abfd
, f
, p
->p_offset
);
845 fprintf (f
, " vaddr 0x");
846 bfd_fprintf_vma (abfd
, f
, p
->p_vaddr
);
847 fprintf (f
, " paddr 0x");
848 bfd_fprintf_vma (abfd
, f
, p
->p_paddr
);
849 fprintf (f
, " align 2**%u\n", bfd_log2 (p
->p_align
));
850 fprintf (f
, " filesz 0x");
851 bfd_fprintf_vma (abfd
, f
, p
->p_filesz
);
852 fprintf (f
, " memsz 0x");
853 bfd_fprintf_vma (abfd
, f
, p
->p_memsz
);
854 fprintf (f
, " flags %c%c%c",
855 (p
->p_flags
& PF_R
) != 0 ? 'r' : '-',
856 (p
->p_flags
& PF_W
) != 0 ? 'w' : '-',
857 (p
->p_flags
& PF_X
) != 0 ? 'x' : '-');
858 if ((p
->p_flags
&~ (unsigned) (PF_R
| PF_W
| PF_X
)) != 0)
859 fprintf (f
, " %lx", p
->p_flags
&~ (unsigned) (PF_R
| PF_W
| PF_X
));
864 s
= bfd_get_section_by_name (abfd
, ".dynamic");
868 unsigned long shlink
;
869 bfd_byte
*extdyn
, *extdynend
;
871 void (*swap_dyn_in
) PARAMS ((bfd
*, const PTR
, Elf_Internal_Dyn
*));
873 fprintf (f
, _("\nDynamic Section:\n"));
875 dynbuf
= (bfd_byte
*) bfd_malloc (s
->_raw_size
);
878 if (! bfd_get_section_contents (abfd
, s
, (PTR
) dynbuf
, (file_ptr
) 0,
882 elfsec
= _bfd_elf_section_from_bfd_section (abfd
, s
);
885 shlink
= elf_elfsections (abfd
)[elfsec
]->sh_link
;
887 extdynsize
= get_elf_backend_data (abfd
)->s
->sizeof_dyn
;
888 swap_dyn_in
= get_elf_backend_data (abfd
)->s
->swap_dyn_in
;
891 extdynend
= extdyn
+ s
->_raw_size
;
892 for (; extdyn
< extdynend
; extdyn
+= extdynsize
)
894 Elf_Internal_Dyn dyn
;
899 (*swap_dyn_in
) (abfd
, (PTR
) extdyn
, &dyn
);
901 if (dyn
.d_tag
== DT_NULL
)
908 sprintf (ab
, "0x%lx", (unsigned long) dyn
.d_tag
);
912 case DT_NEEDED
: name
= "NEEDED"; stringp
= true; break;
913 case DT_PLTRELSZ
: name
= "PLTRELSZ"; break;
914 case DT_PLTGOT
: name
= "PLTGOT"; break;
915 case DT_HASH
: name
= "HASH"; break;
916 case DT_STRTAB
: name
= "STRTAB"; break;
917 case DT_SYMTAB
: name
= "SYMTAB"; break;
918 case DT_RELA
: name
= "RELA"; break;
919 case DT_RELASZ
: name
= "RELASZ"; break;
920 case DT_RELAENT
: name
= "RELAENT"; break;
921 case DT_STRSZ
: name
= "STRSZ"; break;
922 case DT_SYMENT
: name
= "SYMENT"; break;
923 case DT_INIT
: name
= "INIT"; break;
924 case DT_FINI
: name
= "FINI"; break;
925 case DT_SONAME
: name
= "SONAME"; stringp
= true; break;
926 case DT_RPATH
: name
= "RPATH"; stringp
= true; break;
927 case DT_SYMBOLIC
: name
= "SYMBOLIC"; break;
928 case DT_REL
: name
= "REL"; break;
929 case DT_RELSZ
: name
= "RELSZ"; break;
930 case DT_RELENT
: name
= "RELENT"; break;
931 case DT_PLTREL
: name
= "PLTREL"; break;
932 case DT_DEBUG
: name
= "DEBUG"; break;
933 case DT_TEXTREL
: name
= "TEXTREL"; break;
934 case DT_JMPREL
: name
= "JMPREL"; break;
935 case DT_BIND_NOW
: name
= "BIND_NOW"; break;
936 case DT_INIT_ARRAY
: name
= "INIT_ARRAY"; break;
937 case DT_FINI_ARRAY
: name
= "FINI_ARRAY"; break;
938 case DT_INIT_ARRAYSZ
: name
= "INIT_ARRAYSZ"; break;
939 case DT_FINI_ARRAYSZ
: name
= "FINI_ARRAYSZ"; break;
940 case DT_RUNPATH
: name
= "RUNPATH"; stringp
= true; break;
941 case DT_FLAGS
: name
= "FLAGS"; break;
942 case DT_PREINIT_ARRAY
: name
= "PREINIT_ARRAY"; break;
943 case DT_PREINIT_ARRAYSZ
: name
= "PREINIT_ARRAYSZ"; break;
944 case DT_CHECKSUM
: name
= "CHECKSUM"; break;
945 case DT_PLTPADSZ
: name
= "PLTPADSZ"; break;
946 case DT_MOVEENT
: name
= "MOVEENT"; break;
947 case DT_MOVESZ
: name
= "MOVESZ"; break;
948 case DT_FEATURE
: name
= "FEATURE"; break;
949 case DT_POSFLAG_1
: name
= "POSFLAG_1"; break;
950 case DT_SYMINSZ
: name
= "SYMINSZ"; break;
951 case DT_SYMINENT
: name
= "SYMINENT"; break;
952 case DT_CONFIG
: name
= "CONFIG"; stringp
= true; break;
953 case DT_DEPAUDIT
: name
= "DEPAUDIT"; stringp
= true; break;
954 case DT_AUDIT
: name
= "AUDIT"; stringp
= true; break;
955 case DT_PLTPAD
: name
= "PLTPAD"; break;
956 case DT_MOVETAB
: name
= "MOVETAB"; break;
957 case DT_SYMINFO
: name
= "SYMINFO"; break;
958 case DT_RELACOUNT
: name
= "RELACOUNT"; break;
959 case DT_RELCOUNT
: name
= "RELCOUNT"; break;
960 case DT_FLAGS_1
: name
= "FLAGS_1"; break;
961 case DT_VERSYM
: name
= "VERSYM"; break;
962 case DT_VERDEF
: name
= "VERDEF"; break;
963 case DT_VERDEFNUM
: name
= "VERDEFNUM"; break;
964 case DT_VERNEED
: name
= "VERNEED"; break;
965 case DT_VERNEEDNUM
: name
= "VERNEEDNUM"; break;
966 case DT_AUXILIARY
: name
= "AUXILIARY"; stringp
= true; break;
967 case DT_USED
: name
= "USED"; break;
968 case DT_FILTER
: name
= "FILTER"; stringp
= true; break;
971 fprintf (f
, " %-11s ", name
);
973 fprintf (f
, "0x%lx", (unsigned long) dyn
.d_un
.d_val
);
977 unsigned int tagv
= dyn
.d_un
.d_val
;
979 string
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
982 fprintf (f
, "%s", string
);
991 if ((elf_dynverdef (abfd
) != 0 && elf_tdata (abfd
)->verdef
== NULL
)
992 || (elf_dynverref (abfd
) != 0 && elf_tdata (abfd
)->verref
== NULL
))
994 if (! _bfd_elf_slurp_version_tables (abfd
))
998 if (elf_dynverdef (abfd
) != 0)
1000 Elf_Internal_Verdef
*t
;
1002 fprintf (f
, _("\nVersion definitions:\n"));
1003 for (t
= elf_tdata (abfd
)->verdef
; t
!= NULL
; t
= t
->vd_nextdef
)
1005 fprintf (f
, "%d 0x%2.2x 0x%8.8lx %s\n", t
->vd_ndx
,
1006 t
->vd_flags
, t
->vd_hash
, t
->vd_nodename
);
1007 if (t
->vd_auxptr
->vda_nextptr
!= NULL
)
1009 Elf_Internal_Verdaux
*a
;
1012 for (a
= t
->vd_auxptr
->vda_nextptr
;
1015 fprintf (f
, "%s ", a
->vda_nodename
);
1021 if (elf_dynverref (abfd
) != 0)
1023 Elf_Internal_Verneed
*t
;
1025 fprintf (f
, _("\nVersion References:\n"));
1026 for (t
= elf_tdata (abfd
)->verref
; t
!= NULL
; t
= t
->vn_nextref
)
1028 Elf_Internal_Vernaux
*a
;
1030 fprintf (f
, _(" required from %s:\n"), t
->vn_filename
);
1031 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
1032 fprintf (f
, " 0x%8.8lx 0x%2.2x %2.2d %s\n", a
->vna_hash
,
1033 a
->vna_flags
, a
->vna_other
, a
->vna_nodename
);
1045 /* Display ELF-specific fields of a symbol. */
1048 bfd_elf_print_symbol (abfd
, filep
, symbol
, how
)
1052 bfd_print_symbol_type how
;
1054 FILE *file
= (FILE *) filep
;
1057 case bfd_print_symbol_name
:
1058 fprintf (file
, "%s", symbol
->name
);
1060 case bfd_print_symbol_more
:
1061 fprintf (file
, "elf ");
1062 bfd_fprintf_vma (abfd
, file
, symbol
->value
);
1063 fprintf (file
, " %lx", (long) symbol
->flags
);
1065 case bfd_print_symbol_all
:
1067 const char *section_name
;
1068 const char *name
= NULL
;
1069 struct elf_backend_data
*bed
;
1070 unsigned char st_other
;
1073 section_name
= symbol
->section
? symbol
->section
->name
: "(*none*)";
1075 bed
= get_elf_backend_data (abfd
);
1076 if (bed
->elf_backend_print_symbol_all
)
1077 name
= (*bed
->elf_backend_print_symbol_all
) (abfd
, filep
, symbol
);
1081 name
= symbol
->name
;
1082 bfd_print_symbol_vandf (abfd
, (PTR
) file
, symbol
);
1085 fprintf (file
, " %s\t", section_name
);
1086 /* Print the "other" value for a symbol. For common symbols,
1087 we've already printed the size; now print the alignment.
1088 For other symbols, we have no specified alignment, and
1089 we've printed the address; now print the size. */
1090 if (bfd_is_com_section (symbol
->section
))
1091 val
= ((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_value
;
1093 val
= ((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_size
;
1094 bfd_fprintf_vma (abfd
, file
, val
);
1096 /* If we have version information, print it. */
1097 if (elf_tdata (abfd
)->dynversym_section
!= 0
1098 && (elf_tdata (abfd
)->dynverdef_section
!= 0
1099 || elf_tdata (abfd
)->dynverref_section
!= 0))
1101 unsigned int vernum
;
1102 const char *version_string
;
1104 vernum
= ((elf_symbol_type
*) symbol
)->version
& VERSYM_VERSION
;
1107 version_string
= "";
1108 else if (vernum
== 1)
1109 version_string
= "Base";
1110 else if (vernum
<= elf_tdata (abfd
)->cverdefs
)
1112 elf_tdata (abfd
)->verdef
[vernum
- 1].vd_nodename
;
1115 Elf_Internal_Verneed
*t
;
1117 version_string
= "";
1118 for (t
= elf_tdata (abfd
)->verref
;
1122 Elf_Internal_Vernaux
*a
;
1124 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
1126 if (a
->vna_other
== vernum
)
1128 version_string
= a
->vna_nodename
;
1135 if ((((elf_symbol_type
*) symbol
)->version
& VERSYM_HIDDEN
) == 0)
1136 fprintf (file
, " %-11s", version_string
);
1141 fprintf (file
, " (%s)", version_string
);
1142 for (i
= 10 - strlen (version_string
); i
> 0; --i
)
1147 /* If the st_other field is not zero, print it. */
1148 st_other
= ((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_other
;
1153 case STV_INTERNAL
: fprintf (file
, " .internal"); break;
1154 case STV_HIDDEN
: fprintf (file
, " .hidden"); break;
1155 case STV_PROTECTED
: fprintf (file
, " .protected"); break;
1157 /* Some other non-defined flags are also present, so print
1159 fprintf (file
, " 0x%02x", (unsigned int) st_other
);
1162 fprintf (file
, " %s", name
);
1168 /* Create an entry in an ELF linker hash table. */
1170 struct bfd_hash_entry
*
1171 _bfd_elf_link_hash_newfunc (entry
, table
, string
)
1172 struct bfd_hash_entry
*entry
;
1173 struct bfd_hash_table
*table
;
1176 /* Allocate the structure if it has not already been allocated by a
1180 entry
= bfd_hash_allocate (table
, sizeof (struct elf_link_hash_entry
));
1185 /* Call the allocation method of the superclass. */
1186 entry
= _bfd_link_hash_newfunc (entry
, table
, string
);
1189 struct elf_link_hash_entry
*ret
= (struct elf_link_hash_entry
*) entry
;
1190 struct elf_link_hash_table
*htab
= (struct elf_link_hash_table
*) table
;
1192 /* Set local fields. */
1196 ret
->dynstr_index
= 0;
1197 ret
->weakdef
= NULL
;
1198 ret
->got
.refcount
= htab
->init_refcount
;
1199 ret
->plt
.refcount
= htab
->init_refcount
;
1200 ret
->linker_section_pointer
= NULL
;
1201 ret
->verinfo
.verdef
= NULL
;
1202 ret
->vtable_entries_used
= NULL
;
1203 ret
->vtable_entries_size
= 0;
1204 ret
->vtable_parent
= NULL
;
1205 ret
->type
= STT_NOTYPE
;
1207 /* Assume that we have been called by a non-ELF symbol reader.
1208 This flag is then reset by the code which reads an ELF input
1209 file. This ensures that a symbol created by a non-ELF symbol
1210 reader will have the flag set correctly. */
1211 ret
->elf_link_hash_flags
= ELF_LINK_NON_ELF
;
1217 /* Copy data from an indirect symbol to its direct symbol, hiding the
1218 old indirect symbol. Also used for copying flags to a weakdef. */
1221 _bfd_elf_link_hash_copy_indirect (dir
, ind
)
1222 struct elf_link_hash_entry
*dir
, *ind
;
1226 /* Copy down any references that we may have already seen to the
1227 symbol which just became indirect. */
1229 dir
->elf_link_hash_flags
|=
1230 (ind
->elf_link_hash_flags
1231 & (ELF_LINK_HASH_REF_DYNAMIC
1232 | ELF_LINK_HASH_REF_REGULAR
1233 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
1234 | ELF_LINK_NON_GOT_REF
));
1236 if (ind
->root
.type
!= bfd_link_hash_indirect
)
1239 /* Copy over the global and procedure linkage table refcount entries.
1240 These may have been already set up by a check_relocs routine. */
1241 tmp
= dir
->got
.refcount
;
1244 dir
->got
.refcount
= ind
->got
.refcount
;
1245 ind
->got
.refcount
= tmp
;
1248 BFD_ASSERT (ind
->got
.refcount
<= 0);
1250 tmp
= dir
->plt
.refcount
;
1253 dir
->plt
.refcount
= ind
->plt
.refcount
;
1254 ind
->plt
.refcount
= tmp
;
1257 BFD_ASSERT (ind
->plt
.refcount
<= 0);
1259 if (dir
->dynindx
== -1)
1261 dir
->dynindx
= ind
->dynindx
;
1262 dir
->dynstr_index
= ind
->dynstr_index
;
1264 ind
->dynstr_index
= 0;
1267 BFD_ASSERT (ind
->dynindx
== -1);
1271 _bfd_elf_link_hash_hide_symbol (info
, h
)
1272 struct bfd_link_info
*info ATTRIBUTE_UNUSED
;
1273 struct elf_link_hash_entry
*h
;
1275 h
->elf_link_hash_flags
&= ~ELF_LINK_HASH_NEEDS_PLT
;
1276 h
->plt
.offset
= (bfd_vma
) -1;
1277 if ((h
->elf_link_hash_flags
& ELF_LINK_FORCED_LOCAL
) != 0)
1281 /* Initialize an ELF linker hash table. */
1284 _bfd_elf_link_hash_table_init (table
, abfd
, newfunc
)
1285 struct elf_link_hash_table
*table
;
1287 struct bfd_hash_entry
*(*newfunc
) PARAMS ((struct bfd_hash_entry
*,
1288 struct bfd_hash_table
*,
1293 table
->dynamic_sections_created
= false;
1294 table
->dynobj
= NULL
;
1295 table
->init_refcount
= get_elf_backend_data (abfd
)->can_refcount
- 1;
1296 /* The first dynamic symbol is a dummy. */
1297 table
->dynsymcount
= 1;
1298 table
->dynstr
= NULL
;
1299 table
->bucketcount
= 0;
1300 table
->needed
= NULL
;
1301 table
->runpath
= NULL
;
1303 table
->stab_info
= NULL
;
1304 table
->merge_info
= NULL
;
1305 table
->dynlocal
= NULL
;
1306 ret
= _bfd_link_hash_table_init (& table
->root
, abfd
, newfunc
);
1307 table
->root
.type
= bfd_link_elf_hash_table
;
1312 /* Create an ELF linker hash table. */
1314 struct bfd_link_hash_table
*
1315 _bfd_elf_link_hash_table_create (abfd
)
1318 struct elf_link_hash_table
*ret
;
1319 bfd_size_type amt
= sizeof (struct elf_link_hash_table
);
1321 ret
= (struct elf_link_hash_table
*) bfd_alloc (abfd
, amt
);
1322 if (ret
== (struct elf_link_hash_table
*) NULL
)
1325 if (! _bfd_elf_link_hash_table_init (ret
, abfd
, _bfd_elf_link_hash_newfunc
))
1327 bfd_release (abfd
, ret
);
1334 /* This is a hook for the ELF emulation code in the generic linker to
1335 tell the backend linker what file name to use for the DT_NEEDED
1336 entry for a dynamic object. The generic linker passes name as an
1337 empty string to indicate that no DT_NEEDED entry should be made. */
1340 bfd_elf_set_dt_needed_name (abfd
, name
)
1344 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1345 && bfd_get_format (abfd
) == bfd_object
)
1346 elf_dt_name (abfd
) = name
;
1350 bfd_elf_set_dt_needed_soname (abfd
, name
)
1354 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1355 && bfd_get_format (abfd
) == bfd_object
)
1356 elf_dt_soname (abfd
) = name
;
1359 /* Get the list of DT_NEEDED entries for a link. This is a hook for
1360 the linker ELF emulation code. */
1362 struct bfd_link_needed_list
*
1363 bfd_elf_get_needed_list (abfd
, info
)
1364 bfd
*abfd ATTRIBUTE_UNUSED
;
1365 struct bfd_link_info
*info
;
1367 if (info
->hash
->creator
->flavour
!= bfd_target_elf_flavour
)
1369 return elf_hash_table (info
)->needed
;
1372 /* Get the list of DT_RPATH/DT_RUNPATH entries for a link. This is a
1373 hook for the linker ELF emulation code. */
1375 struct bfd_link_needed_list
*
1376 bfd_elf_get_runpath_list (abfd
, info
)
1377 bfd
*abfd ATTRIBUTE_UNUSED
;
1378 struct bfd_link_info
*info
;
1380 if (info
->hash
->creator
->flavour
!= bfd_target_elf_flavour
)
1382 return elf_hash_table (info
)->runpath
;
1385 /* Get the name actually used for a dynamic object for a link. This
1386 is the SONAME entry if there is one. Otherwise, it is the string
1387 passed to bfd_elf_set_dt_needed_name, or it is the filename. */
1390 bfd_elf_get_dt_soname (abfd
)
1393 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1394 && bfd_get_format (abfd
) == bfd_object
)
1395 return elf_dt_name (abfd
);
1399 /* Get the list of DT_NEEDED entries from a BFD. This is a hook for
1400 the ELF linker emulation code. */
1403 bfd_elf_get_bfd_needed_list (abfd
, pneeded
)
1405 struct bfd_link_needed_list
**pneeded
;
1408 bfd_byte
*dynbuf
= NULL
;
1410 unsigned long shlink
;
1411 bfd_byte
*extdyn
, *extdynend
;
1413 void (*swap_dyn_in
) PARAMS ((bfd
*, const PTR
, Elf_Internal_Dyn
*));
1417 if (bfd_get_flavour (abfd
) != bfd_target_elf_flavour
1418 || bfd_get_format (abfd
) != bfd_object
)
1421 s
= bfd_get_section_by_name (abfd
, ".dynamic");
1422 if (s
== NULL
|| s
->_raw_size
== 0)
1425 dynbuf
= (bfd_byte
*) bfd_malloc (s
->_raw_size
);
1429 if (! bfd_get_section_contents (abfd
, s
, (PTR
) dynbuf
, (file_ptr
) 0,
1433 elfsec
= _bfd_elf_section_from_bfd_section (abfd
, s
);
1437 shlink
= elf_elfsections (abfd
)[elfsec
]->sh_link
;
1439 extdynsize
= get_elf_backend_data (abfd
)->s
->sizeof_dyn
;
1440 swap_dyn_in
= get_elf_backend_data (abfd
)->s
->swap_dyn_in
;
1443 extdynend
= extdyn
+ s
->_raw_size
;
1444 for (; extdyn
< extdynend
; extdyn
+= extdynsize
)
1446 Elf_Internal_Dyn dyn
;
1448 (*swap_dyn_in
) (abfd
, (PTR
) extdyn
, &dyn
);
1450 if (dyn
.d_tag
== DT_NULL
)
1453 if (dyn
.d_tag
== DT_NEEDED
)
1456 struct bfd_link_needed_list
*l
;
1457 unsigned int tagv
= dyn
.d_un
.d_val
;
1460 string
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
1465 l
= (struct bfd_link_needed_list
*) bfd_alloc (abfd
, amt
);
1486 /* Allocate an ELF string table--force the first byte to be zero. */
1488 struct bfd_strtab_hash
*
1489 _bfd_elf_stringtab_init ()
1491 struct bfd_strtab_hash
*ret
;
1493 ret
= _bfd_stringtab_init ();
1498 loc
= _bfd_stringtab_add (ret
, "", true, false);
1499 BFD_ASSERT (loc
== 0 || loc
== (bfd_size_type
) -1);
1500 if (loc
== (bfd_size_type
) -1)
1502 _bfd_stringtab_free (ret
);
1509 /* ELF .o/exec file reading */
1511 /* Create a new bfd section from an ELF section header. */
1514 bfd_section_from_shdr (abfd
, shindex
)
1516 unsigned int shindex
;
1518 Elf_Internal_Shdr
*hdr
= elf_elfsections (abfd
)[shindex
];
1519 Elf_Internal_Ehdr
*ehdr
= elf_elfheader (abfd
);
1520 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
1523 name
= elf_string_from_elf_strtab (abfd
, hdr
->sh_name
);
1525 switch (hdr
->sh_type
)
1528 /* Inactive section. Throw it away. */
1531 case SHT_PROGBITS
: /* Normal section with contents. */
1532 case SHT_DYNAMIC
: /* Dynamic linking information. */
1533 case SHT_NOBITS
: /* .bss section. */
1534 case SHT_HASH
: /* .hash section. */
1535 case SHT_NOTE
: /* .note section. */
1536 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1538 case SHT_SYMTAB
: /* A symbol table */
1539 if (elf_onesymtab (abfd
) == shindex
)
1542 BFD_ASSERT (hdr
->sh_entsize
== bed
->s
->sizeof_sym
);
1543 BFD_ASSERT (elf_onesymtab (abfd
) == 0);
1544 elf_onesymtab (abfd
) = shindex
;
1545 elf_tdata (abfd
)->symtab_hdr
= *hdr
;
1546 elf_elfsections (abfd
)[shindex
] = hdr
= &elf_tdata (abfd
)->symtab_hdr
;
1547 abfd
->flags
|= HAS_SYMS
;
1549 /* Sometimes a shared object will map in the symbol table. If
1550 SHF_ALLOC is set, and this is a shared object, then we also
1551 treat this section as a BFD section. We can not base the
1552 decision purely on SHF_ALLOC, because that flag is sometimes
1553 set in a relocateable object file, which would confuse the
1555 if ((hdr
->sh_flags
& SHF_ALLOC
) != 0
1556 && (abfd
->flags
& DYNAMIC
) != 0
1557 && ! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
))
1562 case SHT_DYNSYM
: /* A dynamic symbol table */
1563 if (elf_dynsymtab (abfd
) == shindex
)
1566 BFD_ASSERT (hdr
->sh_entsize
== bed
->s
->sizeof_sym
);
1567 BFD_ASSERT (elf_dynsymtab (abfd
) == 0);
1568 elf_dynsymtab (abfd
) = shindex
;
1569 elf_tdata (abfd
)->dynsymtab_hdr
= *hdr
;
1570 elf_elfsections (abfd
)[shindex
] = hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
1571 abfd
->flags
|= HAS_SYMS
;
1573 /* Besides being a symbol table, we also treat this as a regular
1574 section, so that objcopy can handle it. */
1575 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1577 case SHT_SYMTAB_SHNDX
: /* Symbol section indices when >64k sections */
1578 if (elf_symtab_shndx (abfd
) == shindex
)
1581 /* Get the associated symbol table. */
1582 if (! bfd_section_from_shdr (abfd
, hdr
->sh_link
)
1583 || hdr
->sh_link
!= elf_onesymtab (abfd
))
1586 elf_symtab_shndx (abfd
) = shindex
;
1587 elf_tdata (abfd
)->symtab_shndx_hdr
= *hdr
;
1588 elf_elfsections (abfd
)[shindex
] = &elf_tdata (abfd
)->symtab_shndx_hdr
;
1591 case SHT_STRTAB
: /* A string table */
1592 if (hdr
->bfd_section
!= NULL
)
1594 if (ehdr
->e_shstrndx
== shindex
)
1596 elf_tdata (abfd
)->shstrtab_hdr
= *hdr
;
1597 elf_elfsections (abfd
)[shindex
] = &elf_tdata (abfd
)->shstrtab_hdr
;
1601 unsigned int i
, num_sec
;
1603 num_sec
= elf_numsections (abfd
);
1604 for (i
= 1; i
< num_sec
; i
++)
1606 Elf_Internal_Shdr
*hdr2
= elf_elfsections (abfd
)[i
];
1607 if (hdr2
->sh_link
== shindex
)
1609 if (! bfd_section_from_shdr (abfd
, i
))
1611 if (elf_onesymtab (abfd
) == i
)
1613 elf_tdata (abfd
)->strtab_hdr
= *hdr
;
1614 elf_elfsections (abfd
)[shindex
] =
1615 &elf_tdata (abfd
)->strtab_hdr
;
1618 if (elf_dynsymtab (abfd
) == i
)
1620 elf_tdata (abfd
)->dynstrtab_hdr
= *hdr
;
1621 elf_elfsections (abfd
)[shindex
] = hdr
=
1622 &elf_tdata (abfd
)->dynstrtab_hdr
;
1623 /* We also treat this as a regular section, so
1624 that objcopy can handle it. */
1627 #if 0 /* Not handling other string tables specially right now. */
1628 hdr2
= elf_elfsections (abfd
)[i
]; /* in case it moved */
1629 /* We have a strtab for some random other section. */
1630 newsect
= (asection
*) hdr2
->bfd_section
;
1633 hdr
->bfd_section
= newsect
;
1634 hdr2
= &elf_section_data (newsect
)->str_hdr
;
1636 elf_elfsections (abfd
)[shindex
] = hdr2
;
1642 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1646 /* *These* do a lot of work -- but build no sections! */
1648 asection
*target_sect
;
1649 Elf_Internal_Shdr
*hdr2
;
1650 unsigned int num_sec
= elf_numsections (abfd
);
1652 /* Check for a bogus link to avoid crashing. */
1653 if ((hdr
->sh_link
>= SHN_LORESERVE
&& hdr
->sh_link
<= SHN_HIRESERVE
)
1654 || hdr
->sh_link
>= num_sec
)
1656 ((*_bfd_error_handler
)
1657 (_("%s: invalid link %lu for reloc section %s (index %u)"),
1658 bfd_archive_filename (abfd
), hdr
->sh_link
, name
, shindex
));
1659 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1662 /* For some incomprehensible reason Oracle distributes
1663 libraries for Solaris in which some of the objects have
1664 bogus sh_link fields. It would be nice if we could just
1665 reject them, but, unfortunately, some people need to use
1666 them. We scan through the section headers; if we find only
1667 one suitable symbol table, we clobber the sh_link to point
1668 to it. I hope this doesn't break anything. */
1669 if (elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_SYMTAB
1670 && elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_DYNSYM
)
1676 for (scan
= 1; scan
< num_sec
; scan
++)
1678 if (elf_elfsections (abfd
)[scan
]->sh_type
== SHT_SYMTAB
1679 || elf_elfsections (abfd
)[scan
]->sh_type
== SHT_DYNSYM
)
1690 hdr
->sh_link
= found
;
1693 /* Get the symbol table. */
1694 if (elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
== SHT_SYMTAB
1695 && ! bfd_section_from_shdr (abfd
, hdr
->sh_link
))
1698 /* If this reloc section does not use the main symbol table we
1699 don't treat it as a reloc section. BFD can't adequately
1700 represent such a section, so at least for now, we don't
1701 try. We just present it as a normal section. We also
1702 can't use it as a reloc section if it points to the null
1704 if (hdr
->sh_link
!= elf_onesymtab (abfd
) || hdr
->sh_info
== SHN_UNDEF
)
1705 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1707 if (! bfd_section_from_shdr (abfd
, hdr
->sh_info
))
1709 target_sect
= bfd_section_from_elf_index (abfd
, hdr
->sh_info
);
1710 if (target_sect
== NULL
)
1713 if ((target_sect
->flags
& SEC_RELOC
) == 0
1714 || target_sect
->reloc_count
== 0)
1715 hdr2
= &elf_section_data (target_sect
)->rel_hdr
;
1719 BFD_ASSERT (elf_section_data (target_sect
)->rel_hdr2
== NULL
);
1720 amt
= sizeof (*hdr2
);
1721 hdr2
= (Elf_Internal_Shdr
*) bfd_alloc (abfd
, amt
);
1722 elf_section_data (target_sect
)->rel_hdr2
= hdr2
;
1725 elf_elfsections (abfd
)[shindex
] = hdr2
;
1726 target_sect
->reloc_count
+= NUM_SHDR_ENTRIES (hdr
);
1727 target_sect
->flags
|= SEC_RELOC
;
1728 target_sect
->relocation
= NULL
;
1729 target_sect
->rel_filepos
= hdr
->sh_offset
;
1730 /* In the section to which the relocations apply, mark whether
1731 its relocations are of the REL or RELA variety. */
1732 if (hdr
->sh_size
!= 0)
1733 elf_section_data (target_sect
)->use_rela_p
1734 = (hdr
->sh_type
== SHT_RELA
);
1735 abfd
->flags
|= HAS_RELOC
;
1740 case SHT_GNU_verdef
:
1741 elf_dynverdef (abfd
) = shindex
;
1742 elf_tdata (abfd
)->dynverdef_hdr
= *hdr
;
1743 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1746 case SHT_GNU_versym
:
1747 elf_dynversym (abfd
) = shindex
;
1748 elf_tdata (abfd
)->dynversym_hdr
= *hdr
;
1749 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1752 case SHT_GNU_verneed
:
1753 elf_dynverref (abfd
) = shindex
;
1754 elf_tdata (abfd
)->dynverref_hdr
= *hdr
;
1755 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1762 /* Make a section for objcopy and relocatable links. */
1763 if (!_bfd_elf_make_section_from_shdr (abfd
, hdr
, name
))
1765 if (hdr
->contents
!= NULL
)
1767 Elf_Internal_Group
*idx
= (Elf_Internal_Group
*) hdr
->contents
;
1768 unsigned int n_elt
= hdr
->sh_size
/ 4;
1771 while (--n_elt
!= 0)
1772 if ((s
= (++idx
)->shdr
->bfd_section
) != NULL
1773 && elf_next_in_group (s
) != NULL
)
1775 elf_next_in_group (hdr
->bfd_section
) = s
;
1782 /* Check for any processor-specific section types. */
1784 if (bed
->elf_backend_section_from_shdr
)
1785 (*bed
->elf_backend_section_from_shdr
) (abfd
, hdr
, name
);
1793 /* Return the section for the local symbol specified by ABFD, R_SYMNDX.
1794 Return SEC for sections that have no elf section, and NULL on error. */
1797 bfd_section_from_r_symndx (abfd
, cache
, sec
, r_symndx
)
1799 struct sym_sec_cache
*cache
;
1801 unsigned long r_symndx
;
1803 unsigned char esym_shndx
[4];
1804 unsigned int isym_shndx
;
1805 Elf_Internal_Shdr
*symtab_hdr
;
1808 unsigned int ent
= r_symndx
% LOCAL_SYM_CACHE_SIZE
;
1810 if (cache
->abfd
== abfd
&& cache
->indx
[ent
] == r_symndx
)
1811 return cache
->sec
[ent
];
1813 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
1814 pos
= symtab_hdr
->sh_offset
;
1815 if (get_elf_backend_data (abfd
)->s
->sizeof_sym
1816 == sizeof (Elf64_External_Sym
))
1818 pos
+= r_symndx
* sizeof (Elf64_External_Sym
);
1819 pos
+= offsetof (Elf64_External_Sym
, st_shndx
);
1820 amt
= sizeof (((Elf64_External_Sym
*) 0)->st_shndx
);
1824 pos
+= r_symndx
* sizeof (Elf32_External_Sym
);
1825 pos
+= offsetof (Elf32_External_Sym
, st_shndx
);
1826 amt
= sizeof (((Elf32_External_Sym
*) 0)->st_shndx
);
1828 if (bfd_seek (abfd
, pos
, SEEK_SET
) != 0
1829 || bfd_bread ((PTR
) esym_shndx
, amt
, abfd
) != amt
)
1831 isym_shndx
= H_GET_16 (abfd
, esym_shndx
);
1833 if (isym_shndx
== SHN_XINDEX
)
1835 Elf_Internal_Shdr
*shndx_hdr
= &elf_tdata (abfd
)->symtab_shndx_hdr
;
1836 if (shndx_hdr
->sh_size
!= 0)
1838 pos
= shndx_hdr
->sh_offset
;
1839 pos
+= r_symndx
* sizeof (Elf_External_Sym_Shndx
);
1840 amt
= sizeof (Elf_External_Sym_Shndx
);
1841 if (bfd_seek (abfd
, pos
, SEEK_SET
) != 0
1842 || bfd_bread ((PTR
) esym_shndx
, amt
, abfd
) != amt
)
1844 isym_shndx
= H_GET_32 (abfd
, esym_shndx
);
1848 if (cache
->abfd
!= abfd
)
1850 memset (cache
->indx
, -1, sizeof (cache
->indx
));
1853 cache
->indx
[ent
] = r_symndx
;
1854 cache
->sec
[ent
] = sec
;
1855 if (isym_shndx
< SHN_LORESERVE
|| isym_shndx
> SHN_HIRESERVE
)
1858 s
= bfd_section_from_elf_index (abfd
, isym_shndx
);
1860 cache
->sec
[ent
] = s
;
1862 return cache
->sec
[ent
];
1865 /* Given an ELF section number, retrieve the corresponding BFD
1869 bfd_section_from_elf_index (abfd
, index
)
1873 if (index
>= elf_numsections (abfd
))
1875 return elf_elfsections (abfd
)[index
]->bfd_section
;
1879 _bfd_elf_new_section_hook (abfd
, sec
)
1883 struct bfd_elf_section_data
*sdata
;
1884 bfd_size_type amt
= sizeof (*sdata
);
1886 sdata
= (struct bfd_elf_section_data
*) bfd_zalloc (abfd
, amt
);
1889 sec
->used_by_bfd
= (PTR
) sdata
;
1891 /* Indicate whether or not this section should use RELA relocations. */
1893 = get_elf_backend_data (abfd
)->default_use_rela_p
;
1898 /* Create a new bfd section from an ELF program header.
1900 Since program segments have no names, we generate a synthetic name
1901 of the form segment<NUM>, where NUM is generally the index in the
1902 program header table. For segments that are split (see below) we
1903 generate the names segment<NUM>a and segment<NUM>b.
1905 Note that some program segments may have a file size that is different than
1906 (less than) the memory size. All this means is that at execution the
1907 system must allocate the amount of memory specified by the memory size,
1908 but only initialize it with the first "file size" bytes read from the
1909 file. This would occur for example, with program segments consisting
1910 of combined data+bss.
1912 To handle the above situation, this routine generates TWO bfd sections
1913 for the single program segment. The first has the length specified by
1914 the file size of the segment, and the second has the length specified
1915 by the difference between the two sizes. In effect, the segment is split
1916 into it's initialized and uninitialized parts.
1921 _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, typename
)
1923 Elf_Internal_Phdr
*hdr
;
1925 const char *typename
;
1932 split
= ((hdr
->p_memsz
> 0)
1933 && (hdr
->p_filesz
> 0)
1934 && (hdr
->p_memsz
> hdr
->p_filesz
));
1935 sprintf (namebuf
, "%s%d%s", typename
, index
, split
? "a" : "");
1936 name
= bfd_alloc (abfd
, (bfd_size_type
) strlen (namebuf
) + 1);
1939 strcpy (name
, namebuf
);
1940 newsect
= bfd_make_section (abfd
, name
);
1941 if (newsect
== NULL
)
1943 newsect
->vma
= hdr
->p_vaddr
;
1944 newsect
->lma
= hdr
->p_paddr
;
1945 newsect
->_raw_size
= hdr
->p_filesz
;
1946 newsect
->filepos
= hdr
->p_offset
;
1947 newsect
->flags
|= SEC_HAS_CONTENTS
;
1948 if (hdr
->p_type
== PT_LOAD
)
1950 newsect
->flags
|= SEC_ALLOC
;
1951 newsect
->flags
|= SEC_LOAD
;
1952 if (hdr
->p_flags
& PF_X
)
1954 /* FIXME: all we known is that it has execute PERMISSION,
1956 newsect
->flags
|= SEC_CODE
;
1959 if (!(hdr
->p_flags
& PF_W
))
1961 newsect
->flags
|= SEC_READONLY
;
1966 sprintf (namebuf
, "%s%db", typename
, index
);
1967 name
= bfd_alloc (abfd
, (bfd_size_type
) strlen (namebuf
) + 1);
1970 strcpy (name
, namebuf
);
1971 newsect
= bfd_make_section (abfd
, name
);
1972 if (newsect
== NULL
)
1974 newsect
->vma
= hdr
->p_vaddr
+ hdr
->p_filesz
;
1975 newsect
->lma
= hdr
->p_paddr
+ hdr
->p_filesz
;
1976 newsect
->_raw_size
= hdr
->p_memsz
- hdr
->p_filesz
;
1977 if (hdr
->p_type
== PT_LOAD
)
1979 newsect
->flags
|= SEC_ALLOC
;
1980 if (hdr
->p_flags
& PF_X
)
1981 newsect
->flags
|= SEC_CODE
;
1983 if (!(hdr
->p_flags
& PF_W
))
1984 newsect
->flags
|= SEC_READONLY
;
1991 bfd_section_from_phdr (abfd
, hdr
, index
)
1993 Elf_Internal_Phdr
*hdr
;
1996 struct elf_backend_data
*bed
;
1998 switch (hdr
->p_type
)
2001 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "null");
2004 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "load");
2007 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "dynamic");
2010 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "interp");
2013 if (! _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "note"))
2015 if (! elfcore_read_notes (abfd
, (file_ptr
) hdr
->p_offset
, hdr
->p_filesz
))
2020 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "shlib");
2023 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "phdr");
2026 /* Check for any processor-specific program segment types.
2027 If no handler for them, default to making "segment" sections. */
2028 bed
= get_elf_backend_data (abfd
);
2029 if (bed
->elf_backend_section_from_phdr
)
2030 return (*bed
->elf_backend_section_from_phdr
) (abfd
, hdr
, index
);
2032 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "segment");
2036 /* Initialize REL_HDR, the section-header for new section, containing
2037 relocations against ASECT. If USE_RELA_P is true, we use RELA
2038 relocations; otherwise, we use REL relocations. */
2041 _bfd_elf_init_reloc_shdr (abfd
, rel_hdr
, asect
, use_rela_p
)
2043 Elf_Internal_Shdr
*rel_hdr
;
2048 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2049 bfd_size_type amt
= sizeof ".rela" + strlen (asect
->name
);
2051 name
= bfd_alloc (abfd
, amt
);
2054 sprintf (name
, "%s%s", use_rela_p
? ".rela" : ".rel", asect
->name
);
2056 (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd
), name
,
2058 if (rel_hdr
->sh_name
== (unsigned int) -1)
2060 rel_hdr
->sh_type
= use_rela_p
? SHT_RELA
: SHT_REL
;
2061 rel_hdr
->sh_entsize
= (use_rela_p
2062 ? bed
->s
->sizeof_rela
2063 : bed
->s
->sizeof_rel
);
2064 rel_hdr
->sh_addralign
= bed
->s
->file_align
;
2065 rel_hdr
->sh_flags
= 0;
2066 rel_hdr
->sh_addr
= 0;
2067 rel_hdr
->sh_size
= 0;
2068 rel_hdr
->sh_offset
= 0;
2073 /* Set up an ELF internal section header for a section. */
2076 elf_fake_sections (abfd
, asect
, failedptrarg
)
2081 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2082 boolean
*failedptr
= (boolean
*) failedptrarg
;
2083 Elf_Internal_Shdr
*this_hdr
;
2087 /* We already failed; just get out of the bfd_map_over_sections
2092 this_hdr
= &elf_section_data (asect
)->this_hdr
;
2094 this_hdr
->sh_name
= (unsigned long) _bfd_elf_strtab_add (elf_shstrtab (abfd
),
2095 asect
->name
, false);
2096 if (this_hdr
->sh_name
== (unsigned long) -1)
2102 this_hdr
->sh_flags
= 0;
2104 if ((asect
->flags
& SEC_ALLOC
) != 0
2105 || asect
->user_set_vma
)
2106 this_hdr
->sh_addr
= asect
->vma
;
2108 this_hdr
->sh_addr
= 0;
2110 this_hdr
->sh_offset
= 0;
2111 this_hdr
->sh_size
= asect
->_raw_size
;
2112 this_hdr
->sh_link
= 0;
2113 this_hdr
->sh_addralign
= 1 << asect
->alignment_power
;
2114 /* The sh_entsize and sh_info fields may have been set already by
2115 copy_private_section_data. */
2117 this_hdr
->bfd_section
= asect
;
2118 this_hdr
->contents
= NULL
;
2120 /* FIXME: This should not be based on section names. */
2121 if (strcmp (asect
->name
, ".dynstr") == 0)
2122 this_hdr
->sh_type
= SHT_STRTAB
;
2123 else if (strcmp (asect
->name
, ".hash") == 0)
2125 this_hdr
->sh_type
= SHT_HASH
;
2126 this_hdr
->sh_entsize
= bed
->s
->sizeof_hash_entry
;
2128 else if (strcmp (asect
->name
, ".dynsym") == 0)
2130 this_hdr
->sh_type
= SHT_DYNSYM
;
2131 this_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
2133 else if (strcmp (asect
->name
, ".dynamic") == 0)
2135 this_hdr
->sh_type
= SHT_DYNAMIC
;
2136 this_hdr
->sh_entsize
= bed
->s
->sizeof_dyn
;
2138 else if (strncmp (asect
->name
, ".rela", 5) == 0
2139 && get_elf_backend_data (abfd
)->may_use_rela_p
)
2141 this_hdr
->sh_type
= SHT_RELA
;
2142 this_hdr
->sh_entsize
= bed
->s
->sizeof_rela
;
2144 else if (strncmp (asect
->name
, ".rel", 4) == 0
2145 && get_elf_backend_data (abfd
)->may_use_rel_p
)
2147 this_hdr
->sh_type
= SHT_REL
;
2148 this_hdr
->sh_entsize
= bed
->s
->sizeof_rel
;
2150 else if (strncmp (asect
->name
, ".note", 5) == 0)
2151 this_hdr
->sh_type
= SHT_NOTE
;
2152 else if (strncmp (asect
->name
, ".stab", 5) == 0
2153 && strcmp (asect
->name
+ strlen (asect
->name
) - 3, "str") == 0)
2154 this_hdr
->sh_type
= SHT_STRTAB
;
2155 else if (strcmp (asect
->name
, ".gnu.version") == 0)
2157 this_hdr
->sh_type
= SHT_GNU_versym
;
2158 this_hdr
->sh_entsize
= sizeof (Elf_External_Versym
);
2160 else if (strcmp (asect
->name
, ".gnu.version_d") == 0)
2162 this_hdr
->sh_type
= SHT_GNU_verdef
;
2163 this_hdr
->sh_entsize
= 0;
2164 /* objcopy or strip will copy over sh_info, but may not set
2165 cverdefs. The linker will set cverdefs, but sh_info will be
2167 if (this_hdr
->sh_info
== 0)
2168 this_hdr
->sh_info
= elf_tdata (abfd
)->cverdefs
;
2170 BFD_ASSERT (elf_tdata (abfd
)->cverdefs
== 0
2171 || this_hdr
->sh_info
== elf_tdata (abfd
)->cverdefs
);
2173 else if (strcmp (asect
->name
, ".gnu.version_r") == 0)
2175 this_hdr
->sh_type
= SHT_GNU_verneed
;
2176 this_hdr
->sh_entsize
= 0;
2177 /* objcopy or strip will copy over sh_info, but may not set
2178 cverrefs. The linker will set cverrefs, but sh_info will be
2180 if (this_hdr
->sh_info
== 0)
2181 this_hdr
->sh_info
= elf_tdata (abfd
)->cverrefs
;
2183 BFD_ASSERT (elf_tdata (abfd
)->cverrefs
== 0
2184 || this_hdr
->sh_info
== elf_tdata (abfd
)->cverrefs
);
2186 else if ((asect
->flags
& SEC_GROUP
) != 0)
2188 this_hdr
->sh_type
= SHT_GROUP
;
2189 this_hdr
->sh_entsize
= 4;
2191 else if ((asect
->flags
& SEC_ALLOC
) != 0
2192 && ((asect
->flags
& (SEC_LOAD
| SEC_HAS_CONTENTS
)) == 0))
2193 this_hdr
->sh_type
= SHT_NOBITS
;
2195 this_hdr
->sh_type
= SHT_PROGBITS
;
2197 if ((asect
->flags
& SEC_ALLOC
) != 0)
2198 this_hdr
->sh_flags
|= SHF_ALLOC
;
2199 if ((asect
->flags
& SEC_READONLY
) == 0)
2200 this_hdr
->sh_flags
|= SHF_WRITE
;
2201 if ((asect
->flags
& SEC_CODE
) != 0)
2202 this_hdr
->sh_flags
|= SHF_EXECINSTR
;
2203 if ((asect
->flags
& SEC_MERGE
) != 0)
2205 this_hdr
->sh_flags
|= SHF_MERGE
;
2206 this_hdr
->sh_entsize
= asect
->entsize
;
2207 if ((asect
->flags
& SEC_STRINGS
) != 0)
2208 this_hdr
->sh_flags
|= SHF_STRINGS
;
2210 if (elf_group_name (asect
) != NULL
)
2211 this_hdr
->sh_flags
|= SHF_GROUP
;
2213 /* Check for processor-specific section types. */
2214 if (bed
->elf_backend_fake_sections
)
2215 (*bed
->elf_backend_fake_sections
) (abfd
, this_hdr
, asect
);
2217 /* If the section has relocs, set up a section header for the
2218 SHT_REL[A] section. If two relocation sections are required for
2219 this section, it is up to the processor-specific back-end to
2220 create the other. */
2221 if ((asect
->flags
& SEC_RELOC
) != 0
2222 && !_bfd_elf_init_reloc_shdr (abfd
,
2223 &elf_section_data (asect
)->rel_hdr
,
2225 elf_section_data (asect
)->use_rela_p
))
2229 /* Fill in the contents of a SHT_GROUP section. */
2232 set_group_contents (abfd
, sec
, failedptrarg
)
2235 PTR failedptrarg ATTRIBUTE_UNUSED
;
2237 boolean
*failedptr
= (boolean
*) failedptrarg
;
2238 unsigned long symindx
;
2241 struct bfd_link_order
*l
;
2243 if (elf_section_data (sec
)->this_hdr
.sh_type
!= SHT_GROUP
2247 /* If called from the assembler, swap_out_syms will have set up
2248 elf_section_syms; If called for "ld -r", the symbols won't yet
2249 be mapped, so emulate elf_bfd_final_link. */
2250 if (elf_section_syms (abfd
) != NULL
)
2251 symindx
= elf_section_syms (abfd
)[sec
->index
]->udata
.i
;
2253 symindx
= elf_section_data (sec
)->this_idx
;
2254 elf_section_data (sec
)->this_hdr
.sh_info
= symindx
;
2256 /* Nor will the contents be allocated for "ld -r". */
2257 if (sec
->contents
== NULL
)
2259 sec
->contents
= bfd_alloc (abfd
, sec
->_raw_size
);
2260 if (sec
->contents
== NULL
)
2267 loc
= sec
->contents
+ sec
->_raw_size
;
2269 /* Get the pointer to the first section in the group that we
2270 squirreled away here. */
2271 elt
= elf_next_in_group (sec
);
2273 /* First element is a flag word. Rest of section is elf section
2274 indices for all the sections of the group. Write them backwards
2275 just to keep the group in the same order as given in .section
2276 directives, not that it matters. */
2280 H_PUT_32 (abfd
, elf_section_data (elt
)->this_idx
, loc
);
2281 elt
= elf_next_in_group (elt
);
2284 /* If this is a relocatable link, then the above did nothing because
2285 SEC is the output section. Look through the input sections
2287 for (l
= sec
->link_order_head
; l
!= NULL
; l
= l
->next
)
2288 if (l
->type
== bfd_indirect_link_order
2289 && (elt
= elf_next_in_group (l
->u
.indirect
.section
)) != NULL
)
2294 elf_section_data (elt
->output_section
)->this_idx
, loc
);
2295 elt
= elf_next_in_group (elt
);
2296 /* During a relocatable link, the lists are circular. */
2298 while (elt
!= elf_next_in_group (l
->u
.indirect
.section
));
2301 H_PUT_32 (abfd
, 0, loc
);
2303 BFD_ASSERT (loc
== sec
->contents
);
2306 /* Assign all ELF section numbers. The dummy first section is handled here
2307 too. The link/info pointers for the standard section types are filled
2308 in here too, while we're at it. */
2311 assign_section_numbers (abfd
)
2314 struct elf_obj_tdata
*t
= elf_tdata (abfd
);
2316 unsigned int section_number
, secn
;
2317 Elf_Internal_Shdr
**i_shdrp
;
2322 _bfd_elf_strtab_clear_all_refs (elf_shstrtab (abfd
));
2324 for (sec
= abfd
->sections
; sec
; sec
= sec
->next
)
2326 struct bfd_elf_section_data
*d
= elf_section_data (sec
);
2328 if (section_number
== SHN_LORESERVE
)
2329 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2330 d
->this_idx
= section_number
++;
2331 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->this_hdr
.sh_name
);
2332 if ((sec
->flags
& SEC_RELOC
) == 0)
2336 if (section_number
== SHN_LORESERVE
)
2337 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2338 d
->rel_idx
= section_number
++;
2339 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->rel_hdr
.sh_name
);
2344 if (section_number
== SHN_LORESERVE
)
2345 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2346 d
->rel_idx2
= section_number
++;
2347 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->rel_hdr2
->sh_name
);
2353 if (section_number
== SHN_LORESERVE
)
2354 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2355 t
->shstrtab_section
= section_number
++;
2356 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->shstrtab_hdr
.sh_name
);
2357 elf_elfheader (abfd
)->e_shstrndx
= t
->shstrtab_section
;
2359 if (bfd_get_symcount (abfd
) > 0)
2361 if (section_number
== SHN_LORESERVE
)
2362 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2363 t
->symtab_section
= section_number
++;
2364 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->symtab_hdr
.sh_name
);
2365 if (section_number
> SHN_LORESERVE
- 2)
2367 if (section_number
== SHN_LORESERVE
)
2368 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2369 t
->symtab_shndx_section
= section_number
++;
2370 t
->symtab_shndx_hdr
.sh_name
2371 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd
),
2372 ".symtab_shndx", false);
2373 if (t
->symtab_shndx_hdr
.sh_name
== (unsigned int) -1)
2376 if (section_number
== SHN_LORESERVE
)
2377 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2378 t
->strtab_section
= section_number
++;
2379 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->strtab_hdr
.sh_name
);
2382 _bfd_elf_strtab_finalize (elf_shstrtab (abfd
));
2383 t
->shstrtab_hdr
.sh_size
= _bfd_elf_strtab_size (elf_shstrtab (abfd
));
2385 elf_numsections (abfd
) = section_number
;
2386 elf_elfheader (abfd
)->e_shnum
= section_number
;
2387 if (section_number
> SHN_LORESERVE
)
2388 elf_elfheader (abfd
)->e_shnum
-= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2390 /* Set up the list of section header pointers, in agreement with the
2392 amt
= section_number
* sizeof (Elf_Internal_Shdr
*);
2393 i_shdrp
= (Elf_Internal_Shdr
**) bfd_alloc (abfd
, amt
);
2394 if (i_shdrp
== NULL
)
2397 amt
= sizeof (Elf_Internal_Shdr
);
2398 i_shdrp
[0] = (Elf_Internal_Shdr
*) bfd_alloc (abfd
, amt
);
2399 if (i_shdrp
[0] == NULL
)
2401 bfd_release (abfd
, i_shdrp
);
2404 memset (i_shdrp
[0], 0, sizeof (Elf_Internal_Shdr
));
2406 elf_elfsections (abfd
) = i_shdrp
;
2408 i_shdrp
[t
->shstrtab_section
] = &t
->shstrtab_hdr
;
2409 if (bfd_get_symcount (abfd
) > 0)
2411 i_shdrp
[t
->symtab_section
] = &t
->symtab_hdr
;
2412 if (elf_numsections (abfd
) > SHN_LORESERVE
)
2414 i_shdrp
[t
->symtab_shndx_section
] = &t
->symtab_shndx_hdr
;
2415 t
->symtab_shndx_hdr
.sh_link
= t
->symtab_section
;
2417 i_shdrp
[t
->strtab_section
] = &t
->strtab_hdr
;
2418 t
->symtab_hdr
.sh_link
= t
->strtab_section
;
2420 for (sec
= abfd
->sections
; sec
; sec
= sec
->next
)
2422 struct bfd_elf_section_data
*d
= elf_section_data (sec
);
2426 i_shdrp
[d
->this_idx
] = &d
->this_hdr
;
2427 if (d
->rel_idx
!= 0)
2428 i_shdrp
[d
->rel_idx
] = &d
->rel_hdr
;
2429 if (d
->rel_idx2
!= 0)
2430 i_shdrp
[d
->rel_idx2
] = d
->rel_hdr2
;
2432 /* Fill in the sh_link and sh_info fields while we're at it. */
2434 /* sh_link of a reloc section is the section index of the symbol
2435 table. sh_info is the section index of the section to which
2436 the relocation entries apply. */
2437 if (d
->rel_idx
!= 0)
2439 d
->rel_hdr
.sh_link
= t
->symtab_section
;
2440 d
->rel_hdr
.sh_info
= d
->this_idx
;
2442 if (d
->rel_idx2
!= 0)
2444 d
->rel_hdr2
->sh_link
= t
->symtab_section
;
2445 d
->rel_hdr2
->sh_info
= d
->this_idx
;
2448 switch (d
->this_hdr
.sh_type
)
2452 /* A reloc section which we are treating as a normal BFD
2453 section. sh_link is the section index of the symbol
2454 table. sh_info is the section index of the section to
2455 which the relocation entries apply. We assume that an
2456 allocated reloc section uses the dynamic symbol table.
2457 FIXME: How can we be sure? */
2458 s
= bfd_get_section_by_name (abfd
, ".dynsym");
2460 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
2462 /* We look up the section the relocs apply to by name. */
2464 if (d
->this_hdr
.sh_type
== SHT_REL
)
2468 s
= bfd_get_section_by_name (abfd
, name
);
2470 d
->this_hdr
.sh_info
= elf_section_data (s
)->this_idx
;
2474 /* We assume that a section named .stab*str is a stabs
2475 string section. We look for a section with the same name
2476 but without the trailing ``str'', and set its sh_link
2477 field to point to this section. */
2478 if (strncmp (sec
->name
, ".stab", sizeof ".stab" - 1) == 0
2479 && strcmp (sec
->name
+ strlen (sec
->name
) - 3, "str") == 0)
2484 len
= strlen (sec
->name
);
2485 alc
= (char *) bfd_malloc ((bfd_size_type
) len
- 2);
2488 strncpy (alc
, sec
->name
, len
- 3);
2489 alc
[len
- 3] = '\0';
2490 s
= bfd_get_section_by_name (abfd
, alc
);
2494 elf_section_data (s
)->this_hdr
.sh_link
= d
->this_idx
;
2496 /* This is a .stab section. */
2497 elf_section_data (s
)->this_hdr
.sh_entsize
=
2498 4 + 2 * bfd_get_arch_size (abfd
) / 8;
2505 case SHT_GNU_verneed
:
2506 case SHT_GNU_verdef
:
2507 /* sh_link is the section header index of the string table
2508 used for the dynamic entries, or the symbol table, or the
2510 s
= bfd_get_section_by_name (abfd
, ".dynstr");
2512 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
2516 case SHT_GNU_versym
:
2517 /* sh_link is the section header index of the symbol table
2518 this hash table or version table is for. */
2519 s
= bfd_get_section_by_name (abfd
, ".dynsym");
2521 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
2525 d
->this_hdr
.sh_link
= t
->symtab_section
;
2529 for (secn
= 1; secn
< section_number
; ++secn
)
2530 if (i_shdrp
[secn
] == NULL
)
2531 i_shdrp
[secn
] = i_shdrp
[0];
2533 i_shdrp
[secn
]->sh_name
= _bfd_elf_strtab_offset (elf_shstrtab (abfd
),
2534 i_shdrp
[secn
]->sh_name
);
2538 /* Map symbol from it's internal number to the external number, moving
2539 all local symbols to be at the head of the list. */
2542 sym_is_global (abfd
, sym
)
2546 /* If the backend has a special mapping, use it. */
2547 if (get_elf_backend_data (abfd
)->elf_backend_sym_is_global
)
2548 return ((*get_elf_backend_data (abfd
)->elf_backend_sym_is_global
)
2551 return ((sym
->flags
& (BSF_GLOBAL
| BSF_WEAK
)) != 0
2552 || bfd_is_und_section (bfd_get_section (sym
))
2553 || bfd_is_com_section (bfd_get_section (sym
)));
2557 elf_map_symbols (abfd
)
2560 unsigned int symcount
= bfd_get_symcount (abfd
);
2561 asymbol
**syms
= bfd_get_outsymbols (abfd
);
2562 asymbol
**sect_syms
;
2563 unsigned int num_locals
= 0;
2564 unsigned int num_globals
= 0;
2565 unsigned int num_locals2
= 0;
2566 unsigned int num_globals2
= 0;
2574 fprintf (stderr
, "elf_map_symbols\n");
2578 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
2580 if (max_index
< asect
->index
)
2581 max_index
= asect
->index
;
2585 amt
= max_index
* sizeof (asymbol
*);
2586 sect_syms
= (asymbol
**) bfd_zalloc (abfd
, amt
);
2587 if (sect_syms
== NULL
)
2589 elf_section_syms (abfd
) = sect_syms
;
2590 elf_num_section_syms (abfd
) = max_index
;
2592 /* Init sect_syms entries for any section symbols we have already
2593 decided to output. */
2594 for (idx
= 0; idx
< symcount
; idx
++)
2596 asymbol
*sym
= syms
[idx
];
2598 if ((sym
->flags
& BSF_SECTION_SYM
) != 0
2605 if (sec
->owner
!= NULL
)
2607 if (sec
->owner
!= abfd
)
2609 if (sec
->output_offset
!= 0)
2612 sec
= sec
->output_section
;
2614 /* Empty sections in the input files may have had a
2615 section symbol created for them. (See the comment
2616 near the end of _bfd_generic_link_output_symbols in
2617 linker.c). If the linker script discards such
2618 sections then we will reach this point. Since we know
2619 that we cannot avoid this case, we detect it and skip
2620 the abort and the assignment to the sect_syms array.
2621 To reproduce this particular case try running the
2622 linker testsuite test ld-scripts/weak.exp for an ELF
2623 port that uses the generic linker. */
2624 if (sec
->owner
== NULL
)
2627 BFD_ASSERT (sec
->owner
== abfd
);
2629 sect_syms
[sec
->index
] = syms
[idx
];
2634 /* Classify all of the symbols. */
2635 for (idx
= 0; idx
< symcount
; idx
++)
2637 if (!sym_is_global (abfd
, syms
[idx
]))
2643 /* We will be adding a section symbol for each BFD section. Most normal
2644 sections will already have a section symbol in outsymbols, but
2645 eg. SHT_GROUP sections will not, and we need the section symbol mapped
2646 at least in that case. */
2647 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
2649 if (sect_syms
[asect
->index
] == NULL
)
2651 if (!sym_is_global (abfd
, asect
->symbol
))
2658 /* Now sort the symbols so the local symbols are first. */
2659 amt
= (num_locals
+ num_globals
) * sizeof (asymbol
*);
2660 new_syms
= (asymbol
**) bfd_alloc (abfd
, amt
);
2662 if (new_syms
== NULL
)
2665 for (idx
= 0; idx
< symcount
; idx
++)
2667 asymbol
*sym
= syms
[idx
];
2670 if (!sym_is_global (abfd
, sym
))
2673 i
= num_locals
+ num_globals2
++;
2675 sym
->udata
.i
= i
+ 1;
2677 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
2679 if (sect_syms
[asect
->index
] == NULL
)
2681 asymbol
*sym
= asect
->symbol
;
2684 sect_syms
[asect
->index
] = sym
;
2685 if (!sym_is_global (abfd
, sym
))
2688 i
= num_locals
+ num_globals2
++;
2690 sym
->udata
.i
= i
+ 1;
2694 bfd_set_symtab (abfd
, new_syms
, num_locals
+ num_globals
);
2696 elf_num_locals (abfd
) = num_locals
;
2697 elf_num_globals (abfd
) = num_globals
;
2701 /* Align to the maximum file alignment that could be required for any
2702 ELF data structure. */
2704 static INLINE file_ptr align_file_position
PARAMS ((file_ptr
, int));
2705 static INLINE file_ptr
2706 align_file_position (off
, align
)
2710 return (off
+ align
- 1) & ~(align
- 1);
2713 /* Assign a file position to a section, optionally aligning to the
2714 required section alignment. */
2717 _bfd_elf_assign_file_position_for_section (i_shdrp
, offset
, align
)
2718 Elf_Internal_Shdr
*i_shdrp
;
2726 al
= i_shdrp
->sh_addralign
;
2728 offset
= BFD_ALIGN (offset
, al
);
2730 i_shdrp
->sh_offset
= offset
;
2731 if (i_shdrp
->bfd_section
!= NULL
)
2732 i_shdrp
->bfd_section
->filepos
= offset
;
2733 if (i_shdrp
->sh_type
!= SHT_NOBITS
)
2734 offset
+= i_shdrp
->sh_size
;
2738 /* Compute the file positions we are going to put the sections at, and
2739 otherwise prepare to begin writing out the ELF file. If LINK_INFO
2740 is not NULL, this is being called by the ELF backend linker. */
2743 _bfd_elf_compute_section_file_positions (abfd
, link_info
)
2745 struct bfd_link_info
*link_info
;
2747 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2749 struct bfd_strtab_hash
*strtab
;
2750 Elf_Internal_Shdr
*shstrtab_hdr
;
2752 if (abfd
->output_has_begun
)
2755 /* Do any elf backend specific processing first. */
2756 if (bed
->elf_backend_begin_write_processing
)
2757 (*bed
->elf_backend_begin_write_processing
) (abfd
, link_info
);
2759 if (! prep_headers (abfd
))
2762 /* Post process the headers if necessary. */
2763 if (bed
->elf_backend_post_process_headers
)
2764 (*bed
->elf_backend_post_process_headers
) (abfd
, link_info
);
2767 bfd_map_over_sections (abfd
, elf_fake_sections
, &failed
);
2771 if (!assign_section_numbers (abfd
))
2774 /* The backend linker builds symbol table information itself. */
2775 if (link_info
== NULL
&& bfd_get_symcount (abfd
) > 0)
2777 /* Non-zero if doing a relocatable link. */
2778 int relocatable_p
= ! (abfd
->flags
& (EXEC_P
| DYNAMIC
));
2780 if (! swap_out_syms (abfd
, &strtab
, relocatable_p
))
2784 if (link_info
== NULL
|| link_info
->relocateable
)
2786 bfd_map_over_sections (abfd
, set_group_contents
, &failed
);
2791 shstrtab_hdr
= &elf_tdata (abfd
)->shstrtab_hdr
;
2792 /* sh_name was set in prep_headers. */
2793 shstrtab_hdr
->sh_type
= SHT_STRTAB
;
2794 shstrtab_hdr
->sh_flags
= 0;
2795 shstrtab_hdr
->sh_addr
= 0;
2796 shstrtab_hdr
->sh_size
= _bfd_elf_strtab_size (elf_shstrtab (abfd
));
2797 shstrtab_hdr
->sh_entsize
= 0;
2798 shstrtab_hdr
->sh_link
= 0;
2799 shstrtab_hdr
->sh_info
= 0;
2800 /* sh_offset is set in assign_file_positions_except_relocs. */
2801 shstrtab_hdr
->sh_addralign
= 1;
2803 if (!assign_file_positions_except_relocs (abfd
))
2806 if (link_info
== NULL
&& bfd_get_symcount (abfd
) > 0)
2809 Elf_Internal_Shdr
*hdr
;
2811 off
= elf_tdata (abfd
)->next_file_pos
;
2813 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2814 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, true);
2816 hdr
= &elf_tdata (abfd
)->symtab_shndx_hdr
;
2817 if (hdr
->sh_size
!= 0)
2818 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, true);
2820 hdr
= &elf_tdata (abfd
)->strtab_hdr
;
2821 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, true);
2823 elf_tdata (abfd
)->next_file_pos
= off
;
2825 /* Now that we know where the .strtab section goes, write it
2827 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
2828 || ! _bfd_stringtab_emit (abfd
, strtab
))
2830 _bfd_stringtab_free (strtab
);
2833 abfd
->output_has_begun
= true;
2838 /* Create a mapping from a set of sections to a program segment. */
2840 static INLINE
struct elf_segment_map
*
2841 make_mapping (abfd
, sections
, from
, to
, phdr
)
2843 asection
**sections
;
2848 struct elf_segment_map
*m
;
2853 amt
= sizeof (struct elf_segment_map
);
2854 amt
+= (to
- from
- 1) * sizeof (asection
*);
2855 m
= (struct elf_segment_map
*) bfd_zalloc (abfd
, amt
);
2859 m
->p_type
= PT_LOAD
;
2860 for (i
= from
, hdrpp
= sections
+ from
; i
< to
; i
++, hdrpp
++)
2861 m
->sections
[i
- from
] = *hdrpp
;
2862 m
->count
= to
- from
;
2864 if (from
== 0 && phdr
)
2866 /* Include the headers in the first PT_LOAD segment. */
2867 m
->includes_filehdr
= 1;
2868 m
->includes_phdrs
= 1;
2874 /* Set up a mapping from BFD sections to program segments. */
2877 map_sections_to_segments (abfd
)
2880 asection
**sections
= NULL
;
2884 struct elf_segment_map
*mfirst
;
2885 struct elf_segment_map
**pm
;
2886 struct elf_segment_map
*m
;
2888 unsigned int phdr_index
;
2889 bfd_vma maxpagesize
;
2891 boolean phdr_in_segment
= true;
2893 asection
*dynsec
, *eh_frame_hdr
;
2896 if (elf_tdata (abfd
)->segment_map
!= NULL
)
2899 if (bfd_count_sections (abfd
) == 0)
2902 /* Select the allocated sections, and sort them. */
2904 amt
= bfd_count_sections (abfd
) * sizeof (asection
*);
2905 sections
= (asection
**) bfd_malloc (amt
);
2906 if (sections
== NULL
)
2910 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
2912 if ((s
->flags
& SEC_ALLOC
) != 0)
2918 BFD_ASSERT (i
<= bfd_count_sections (abfd
));
2921 qsort (sections
, (size_t) count
, sizeof (asection
*), elf_sort_sections
);
2923 /* Build the mapping. */
2928 /* If we have a .interp section, then create a PT_PHDR segment for
2929 the program headers and a PT_INTERP segment for the .interp
2931 s
= bfd_get_section_by_name (abfd
, ".interp");
2932 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0)
2934 amt
= sizeof (struct elf_segment_map
);
2935 m
= (struct elf_segment_map
*) bfd_zalloc (abfd
, amt
);
2939 m
->p_type
= PT_PHDR
;
2940 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
2941 m
->p_flags
= PF_R
| PF_X
;
2942 m
->p_flags_valid
= 1;
2943 m
->includes_phdrs
= 1;
2948 amt
= sizeof (struct elf_segment_map
);
2949 m
= (struct elf_segment_map
*) bfd_zalloc (abfd
, amt
);
2953 m
->p_type
= PT_INTERP
;
2961 /* Look through the sections. We put sections in the same program
2962 segment when the start of the second section can be placed within
2963 a few bytes of the end of the first section. */
2966 maxpagesize
= get_elf_backend_data (abfd
)->maxpagesize
;
2968 dynsec
= bfd_get_section_by_name (abfd
, ".dynamic");
2970 && (dynsec
->flags
& SEC_LOAD
) == 0)
2973 /* Deal with -Ttext or something similar such that the first section
2974 is not adjacent to the program headers. This is an
2975 approximation, since at this point we don't know exactly how many
2976 program headers we will need. */
2979 bfd_size_type phdr_size
;
2981 phdr_size
= elf_tdata (abfd
)->program_header_size
;
2983 phdr_size
= get_elf_backend_data (abfd
)->s
->sizeof_phdr
;
2984 if ((abfd
->flags
& D_PAGED
) == 0
2985 || sections
[0]->lma
< phdr_size
2986 || sections
[0]->lma
% maxpagesize
< phdr_size
% maxpagesize
)
2987 phdr_in_segment
= false;
2990 for (i
= 0, hdrpp
= sections
; i
< count
; i
++, hdrpp
++)
2993 boolean new_segment
;
2997 /* See if this section and the last one will fit in the same
3000 if (last_hdr
== NULL
)
3002 /* If we don't have a segment yet, then we don't need a new
3003 one (we build the last one after this loop). */
3004 new_segment
= false;
3006 else if (last_hdr
->lma
- last_hdr
->vma
!= hdr
->lma
- hdr
->vma
)
3008 /* If this section has a different relation between the
3009 virtual address and the load address, then we need a new
3013 else if (BFD_ALIGN (last_hdr
->lma
+ last_hdr
->_raw_size
, maxpagesize
)
3014 < BFD_ALIGN (hdr
->lma
, maxpagesize
))
3016 /* If putting this section in this segment would force us to
3017 skip a page in the segment, then we need a new segment. */
3020 else if ((last_hdr
->flags
& SEC_LOAD
) == 0
3021 && (hdr
->flags
& SEC_LOAD
) != 0)
3023 /* We don't want to put a loadable section after a
3024 nonloadable section in the same segment. */
3027 else if ((abfd
->flags
& D_PAGED
) == 0)
3029 /* If the file is not demand paged, which means that we
3030 don't require the sections to be correctly aligned in the
3031 file, then there is no other reason for a new segment. */
3032 new_segment
= false;
3035 && (hdr
->flags
& SEC_READONLY
) == 0
3036 && (BFD_ALIGN (last_hdr
->lma
+ last_hdr
->_raw_size
, maxpagesize
)
3039 /* We don't want to put a writable section in a read only
3040 segment, unless they are on the same page in memory
3041 anyhow. We already know that the last section does not
3042 bring us past the current section on the page, so the
3043 only case in which the new section is not on the same
3044 page as the previous section is when the previous section
3045 ends precisely on a page boundary. */
3050 /* Otherwise, we can use the same segment. */
3051 new_segment
= false;
3056 if ((hdr
->flags
& SEC_READONLY
) == 0)
3062 /* We need a new program segment. We must create a new program
3063 header holding all the sections from phdr_index until hdr. */
3065 m
= make_mapping (abfd
, sections
, phdr_index
, i
, phdr_in_segment
);
3072 if ((hdr
->flags
& SEC_READONLY
) == 0)
3079 phdr_in_segment
= false;
3082 /* Create a final PT_LOAD program segment. */
3083 if (last_hdr
!= NULL
)
3085 m
= make_mapping (abfd
, sections
, phdr_index
, i
, phdr_in_segment
);
3093 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
3096 amt
= sizeof (struct elf_segment_map
);
3097 m
= (struct elf_segment_map
*) bfd_zalloc (abfd
, amt
);
3101 m
->p_type
= PT_DYNAMIC
;
3103 m
->sections
[0] = dynsec
;
3109 /* For each loadable .note section, add a PT_NOTE segment. We don't
3110 use bfd_get_section_by_name, because if we link together
3111 nonloadable .note sections and loadable .note sections, we will
3112 generate two .note sections in the output file. FIXME: Using
3113 names for section types is bogus anyhow. */
3114 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
3116 if ((s
->flags
& SEC_LOAD
) != 0
3117 && strncmp (s
->name
, ".note", 5) == 0)
3119 amt
= sizeof (struct elf_segment_map
);
3120 m
= (struct elf_segment_map
*) bfd_zalloc (abfd
, amt
);
3124 m
->p_type
= PT_NOTE
;
3133 /* If there is a .eh_frame_hdr section, throw in a PT_GNU_EH_FRAME
3135 eh_frame_hdr
= NULL
;
3136 if (elf_tdata (abfd
)->eh_frame_hdr
)
3137 eh_frame_hdr
= bfd_get_section_by_name (abfd
, ".eh_frame_hdr");
3138 if (eh_frame_hdr
!= NULL
&& (eh_frame_hdr
->flags
& SEC_LOAD
))
3140 amt
= sizeof (struct elf_segment_map
);
3141 m
= (struct elf_segment_map
*) bfd_zalloc (abfd
, amt
);
3145 m
->p_type
= PT_GNU_EH_FRAME
;
3147 m
->sections
[0] = eh_frame_hdr
;
3156 elf_tdata (abfd
)->segment_map
= mfirst
;
3160 if (sections
!= NULL
)
3165 /* Sort sections by address. */
3168 elf_sort_sections (arg1
, arg2
)
3172 const asection
*sec1
= *(const asection
**) arg1
;
3173 const asection
*sec2
= *(const asection
**) arg2
;
3175 /* Sort by LMA first, since this is the address used to
3176 place the section into a segment. */
3177 if (sec1
->lma
< sec2
->lma
)
3179 else if (sec1
->lma
> sec2
->lma
)
3182 /* Then sort by VMA. Normally the LMA and the VMA will be
3183 the same, and this will do nothing. */
3184 if (sec1
->vma
< sec2
->vma
)
3186 else if (sec1
->vma
> sec2
->vma
)
3189 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
3191 #define TOEND(x) (((x)->flags & SEC_LOAD) == 0)
3197 /* If the indicies are the same, do not return 0
3198 here, but continue to try the next comparison. */
3199 if (sec1
->target_index
- sec2
->target_index
!= 0)
3200 return sec1
->target_index
- sec2
->target_index
;
3205 else if (TOEND (sec2
))
3210 /* Sort by size, to put zero sized sections
3211 before others at the same address. */
3213 if (sec1
->_raw_size
< sec2
->_raw_size
)
3215 if (sec1
->_raw_size
> sec2
->_raw_size
)
3218 return sec1
->target_index
- sec2
->target_index
;
3221 /* Assign file positions to the sections based on the mapping from
3222 sections to segments. This function also sets up some fields in
3223 the file header, and writes out the program headers. */
3226 assign_file_positions_for_segments (abfd
)
3229 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3231 struct elf_segment_map
*m
;
3233 Elf_Internal_Phdr
*phdrs
;
3235 bfd_vma filehdr_vaddr
, filehdr_paddr
;
3236 bfd_vma phdrs_vaddr
, phdrs_paddr
;
3237 Elf_Internal_Phdr
*p
;
3240 if (elf_tdata (abfd
)->segment_map
== NULL
)
3242 if (! map_sections_to_segments (abfd
))
3246 if (bed
->elf_backend_modify_segment_map
)
3248 if (! (*bed
->elf_backend_modify_segment_map
) (abfd
))
3253 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
3256 elf_elfheader (abfd
)->e_phoff
= bed
->s
->sizeof_ehdr
;
3257 elf_elfheader (abfd
)->e_phentsize
= bed
->s
->sizeof_phdr
;
3258 elf_elfheader (abfd
)->e_phnum
= count
;
3263 /* If we already counted the number of program segments, make sure
3264 that we allocated enough space. This happens when SIZEOF_HEADERS
3265 is used in a linker script. */
3266 alloc
= elf_tdata (abfd
)->program_header_size
/ bed
->s
->sizeof_phdr
;
3267 if (alloc
!= 0 && count
> alloc
)
3269 ((*_bfd_error_handler
)
3270 (_("%s: Not enough room for program headers (allocated %u, need %u)"),
3271 bfd_get_filename (abfd
), alloc
, count
));
3272 bfd_set_error (bfd_error_bad_value
);
3279 amt
= alloc
* sizeof (Elf_Internal_Phdr
);
3280 phdrs
= (Elf_Internal_Phdr
*) bfd_alloc (abfd
, amt
);
3284 off
= bed
->s
->sizeof_ehdr
;
3285 off
+= alloc
* bed
->s
->sizeof_phdr
;
3292 for (m
= elf_tdata (abfd
)->segment_map
, p
= phdrs
;
3299 /* If elf_segment_map is not from map_sections_to_segments, the
3300 sections may not be correctly ordered. */
3302 qsort (m
->sections
, (size_t) m
->count
, sizeof (asection
*),
3305 p
->p_type
= m
->p_type
;
3306 p
->p_flags
= m
->p_flags
;
3308 if (p
->p_type
== PT_LOAD
3310 && (m
->sections
[0]->flags
& SEC_ALLOC
) != 0)
3312 if ((abfd
->flags
& D_PAGED
) != 0)
3313 off
+= (m
->sections
[0]->vma
- off
) % bed
->maxpagesize
;
3316 bfd_size_type align
;
3319 for (i
= 0, secpp
= m
->sections
; i
< m
->count
; i
++, secpp
++)
3321 bfd_size_type secalign
;
3323 secalign
= bfd_get_section_alignment (abfd
, *secpp
);
3324 if (secalign
> align
)
3328 off
+= (m
->sections
[0]->vma
- off
) % (1 << align
);
3335 p
->p_vaddr
= m
->sections
[0]->vma
;
3337 if (m
->p_paddr_valid
)
3338 p
->p_paddr
= m
->p_paddr
;
3339 else if (m
->count
== 0)
3342 p
->p_paddr
= m
->sections
[0]->lma
;
3344 if (p
->p_type
== PT_LOAD
3345 && (abfd
->flags
& D_PAGED
) != 0)
3346 p
->p_align
= bed
->maxpagesize
;
3347 else if (m
->count
== 0)
3348 p
->p_align
= bed
->s
->file_align
;
3356 if (m
->includes_filehdr
)
3358 if (! m
->p_flags_valid
)
3361 p
->p_filesz
= bed
->s
->sizeof_ehdr
;
3362 p
->p_memsz
= bed
->s
->sizeof_ehdr
;
3365 BFD_ASSERT (p
->p_type
== PT_LOAD
);
3367 if (p
->p_vaddr
< (bfd_vma
) off
)
3369 _bfd_error_handler (_("%s: Not enough room for program headers, try linking with -N"),
3370 bfd_get_filename (abfd
));
3371 bfd_set_error (bfd_error_bad_value
);
3376 if (! m
->p_paddr_valid
)
3379 if (p
->p_type
== PT_LOAD
)
3381 filehdr_vaddr
= p
->p_vaddr
;
3382 filehdr_paddr
= p
->p_paddr
;
3386 if (m
->includes_phdrs
)
3388 if (! m
->p_flags_valid
)
3391 if (m
->includes_filehdr
)
3393 if (p
->p_type
== PT_LOAD
)
3395 phdrs_vaddr
= p
->p_vaddr
+ bed
->s
->sizeof_ehdr
;
3396 phdrs_paddr
= p
->p_paddr
+ bed
->s
->sizeof_ehdr
;
3401 p
->p_offset
= bed
->s
->sizeof_ehdr
;
3405 BFD_ASSERT (p
->p_type
== PT_LOAD
);
3406 p
->p_vaddr
-= off
- p
->p_offset
;
3407 if (! m
->p_paddr_valid
)
3408 p
->p_paddr
-= off
- p
->p_offset
;
3411 if (p
->p_type
== PT_LOAD
)
3413 phdrs_vaddr
= p
->p_vaddr
;
3414 phdrs_paddr
= p
->p_paddr
;
3417 phdrs_vaddr
= bed
->maxpagesize
+ bed
->s
->sizeof_ehdr
;
3420 p
->p_filesz
+= alloc
* bed
->s
->sizeof_phdr
;
3421 p
->p_memsz
+= alloc
* bed
->s
->sizeof_phdr
;
3424 if (p
->p_type
== PT_LOAD
3425 || (p
->p_type
== PT_NOTE
&& bfd_get_format (abfd
) == bfd_core
))
3427 if (! m
->includes_filehdr
&& ! m
->includes_phdrs
)
3433 adjust
= off
- (p
->p_offset
+ p
->p_filesz
);
3434 p
->p_filesz
+= adjust
;
3435 p
->p_memsz
+= adjust
;
3441 for (i
= 0, secpp
= m
->sections
; i
< m
->count
; i
++, secpp
++)
3445 bfd_size_type align
;
3449 align
= 1 << bfd_get_section_alignment (abfd
, sec
);
3451 /* The section may have artificial alignment forced by a
3452 link script. Notice this case by the gap between the
3453 cumulative phdr lma and the section's lma. */
3454 if (p
->p_paddr
+ p
->p_memsz
< sec
->lma
)
3456 bfd_vma adjust
= sec
->lma
- (p
->p_paddr
+ p
->p_memsz
);
3458 p
->p_memsz
+= adjust
;
3461 if ((flags
& SEC_LOAD
) != 0)
3462 p
->p_filesz
+= adjust
;
3465 if (p
->p_type
== PT_LOAD
)
3467 bfd_signed_vma adjust
;
3469 if ((flags
& SEC_LOAD
) != 0)
3471 adjust
= sec
->lma
- (p
->p_paddr
+ p
->p_memsz
);
3475 else if ((flags
& SEC_ALLOC
) != 0)
3477 /* The section VMA must equal the file position
3478 modulo the page size. FIXME: I'm not sure if
3479 this adjustment is really necessary. We used to
3480 not have the SEC_LOAD case just above, and then
3481 this was necessary, but now I'm not sure. */
3482 if ((abfd
->flags
& D_PAGED
) != 0)
3483 adjust
= (sec
->vma
- voff
) % bed
->maxpagesize
;
3485 adjust
= (sec
->vma
- voff
) % align
;
3494 (* _bfd_error_handler
) (_("\
3495 Error: First section in segment (%s) starts at 0x%x whereas the segment starts at 0x%x"),
3496 bfd_section_name (abfd
, sec
),
3501 p
->p_memsz
+= adjust
;
3504 if ((flags
& SEC_LOAD
) != 0)
3505 p
->p_filesz
+= adjust
;
3510 /* We check SEC_HAS_CONTENTS here because if NOLOAD is
3511 used in a linker script we may have a section with
3512 SEC_LOAD clear but which is supposed to have
3514 if ((flags
& SEC_LOAD
) != 0
3515 || (flags
& SEC_HAS_CONTENTS
) != 0)
3516 off
+= sec
->_raw_size
;
3518 if ((flags
& SEC_ALLOC
) != 0)
3519 voff
+= sec
->_raw_size
;
3522 if (p
->p_type
== PT_NOTE
&& bfd_get_format (abfd
) == bfd_core
)
3524 /* The actual "note" segment has i == 0.
3525 This is the one that actually contains everything. */
3529 p
->p_filesz
= sec
->_raw_size
;
3530 off
+= sec
->_raw_size
;
3535 /* Fake sections -- don't need to be written. */
3538 flags
= sec
->flags
= 0;
3545 p
->p_memsz
+= sec
->_raw_size
;
3547 if ((flags
& SEC_LOAD
) != 0)
3548 p
->p_filesz
+= sec
->_raw_size
;
3550 if (align
> p
->p_align
3551 && (p
->p_type
!= PT_LOAD
|| (abfd
->flags
& D_PAGED
) == 0))
3555 if (! m
->p_flags_valid
)
3558 if ((flags
& SEC_CODE
) != 0)
3560 if ((flags
& SEC_READONLY
) == 0)
3566 /* Now that we have set the section file positions, we can set up
3567 the file positions for the non PT_LOAD segments. */
3568 for (m
= elf_tdata (abfd
)->segment_map
, p
= phdrs
;
3572 if (p
->p_type
!= PT_LOAD
&& m
->count
> 0)
3574 BFD_ASSERT (! m
->includes_filehdr
&& ! m
->includes_phdrs
);
3575 p
->p_offset
= m
->sections
[0]->filepos
;
3579 if (m
->includes_filehdr
)
3581 p
->p_vaddr
= filehdr_vaddr
;
3582 if (! m
->p_paddr_valid
)
3583 p
->p_paddr
= filehdr_paddr
;
3585 else if (m
->includes_phdrs
)
3587 p
->p_vaddr
= phdrs_vaddr
;
3588 if (! m
->p_paddr_valid
)
3589 p
->p_paddr
= phdrs_paddr
;
3594 /* Clear out any program headers we allocated but did not use. */
3595 for (; count
< alloc
; count
++, p
++)
3597 memset (p
, 0, sizeof *p
);
3598 p
->p_type
= PT_NULL
;
3601 elf_tdata (abfd
)->phdr
= phdrs
;
3603 elf_tdata (abfd
)->next_file_pos
= off
;
3605 /* Write out the program headers. */
3606 if (bfd_seek (abfd
, (bfd_signed_vma
) bed
->s
->sizeof_ehdr
, SEEK_SET
) != 0
3607 || bed
->s
->write_out_phdrs (abfd
, phdrs
, alloc
) != 0)
3613 /* Get the size of the program header.
3615 If this is called by the linker before any of the section VMA's are set, it
3616 can't calculate the correct value for a strange memory layout. This only
3617 happens when SIZEOF_HEADERS is used in a linker script. In this case,
3618 SORTED_HDRS is NULL and we assume the normal scenario of one text and one
3619 data segment (exclusive of .interp and .dynamic).
3621 ??? User written scripts must either not use SIZEOF_HEADERS, or assume there
3622 will be two segments. */
3624 static bfd_size_type
3625 get_program_header_size (abfd
)
3630 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3632 /* We can't return a different result each time we're called. */
3633 if (elf_tdata (abfd
)->program_header_size
!= 0)
3634 return elf_tdata (abfd
)->program_header_size
;
3636 if (elf_tdata (abfd
)->segment_map
!= NULL
)
3638 struct elf_segment_map
*m
;
3641 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
3643 elf_tdata (abfd
)->program_header_size
= segs
* bed
->s
->sizeof_phdr
;
3644 return elf_tdata (abfd
)->program_header_size
;
3647 /* Assume we will need exactly two PT_LOAD segments: one for text
3648 and one for data. */
3651 s
= bfd_get_section_by_name (abfd
, ".interp");
3652 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0)
3654 /* If we have a loadable interpreter section, we need a
3655 PT_INTERP segment. In this case, assume we also need a
3656 PT_PHDR segment, although that may not be true for all
3661 if (bfd_get_section_by_name (abfd
, ".dynamic") != NULL
)
3663 /* We need a PT_DYNAMIC segment. */
3667 if (elf_tdata (abfd
)->eh_frame_hdr
3668 && bfd_get_section_by_name (abfd
, ".eh_frame_hdr") != NULL
)
3670 /* We need a PT_GNU_EH_FRAME segment. */
3674 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
3676 if ((s
->flags
& SEC_LOAD
) != 0
3677 && strncmp (s
->name
, ".note", 5) == 0)
3679 /* We need a PT_NOTE segment. */
3684 /* Let the backend count up any program headers it might need. */
3685 if (bed
->elf_backend_additional_program_headers
)
3689 a
= (*bed
->elf_backend_additional_program_headers
) (abfd
);
3695 elf_tdata (abfd
)->program_header_size
= segs
* bed
->s
->sizeof_phdr
;
3696 return elf_tdata (abfd
)->program_header_size
;
3699 /* Work out the file positions of all the sections. This is called by
3700 _bfd_elf_compute_section_file_positions. All the section sizes and
3701 VMAs must be known before this is called.
3703 We do not consider reloc sections at this point, unless they form
3704 part of the loadable image. Reloc sections are assigned file
3705 positions in assign_file_positions_for_relocs, which is called by
3706 write_object_contents and final_link.
3708 We also don't set the positions of the .symtab and .strtab here. */
3711 assign_file_positions_except_relocs (abfd
)
3714 struct elf_obj_tdata
* const tdata
= elf_tdata (abfd
);
3715 Elf_Internal_Ehdr
* const i_ehdrp
= elf_elfheader (abfd
);
3716 Elf_Internal_Shdr
** const i_shdrpp
= elf_elfsections (abfd
);
3717 unsigned int num_sec
= elf_numsections (abfd
);
3719 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3721 if ((abfd
->flags
& (EXEC_P
| DYNAMIC
)) == 0
3722 && bfd_get_format (abfd
) != bfd_core
)
3724 Elf_Internal_Shdr
**hdrpp
;
3727 /* Start after the ELF header. */
3728 off
= i_ehdrp
->e_ehsize
;
3730 /* We are not creating an executable, which means that we are
3731 not creating a program header, and that the actual order of
3732 the sections in the file is unimportant. */
3733 for (i
= 1, hdrpp
= i_shdrpp
+ 1; i
< num_sec
; i
++, hdrpp
++)
3735 Elf_Internal_Shdr
*hdr
;
3738 if (hdr
->sh_type
== SHT_REL
3739 || hdr
->sh_type
== SHT_RELA
3740 || i
== tdata
->symtab_section
3741 || i
== tdata
->symtab_shndx_section
3742 || i
== tdata
->strtab_section
)
3744 hdr
->sh_offset
= -1;
3747 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, true);
3749 if (i
== SHN_LORESERVE
- 1)
3751 i
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
3752 hdrpp
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
3759 Elf_Internal_Shdr
**hdrpp
;
3761 /* Assign file positions for the loaded sections based on the
3762 assignment of sections to segments. */
3763 if (! assign_file_positions_for_segments (abfd
))
3766 /* Assign file positions for the other sections. */
3768 off
= elf_tdata (abfd
)->next_file_pos
;
3769 for (i
= 1, hdrpp
= i_shdrpp
+ 1; i
< num_sec
; i
++, hdrpp
++)
3771 Elf_Internal_Shdr
*hdr
;
3774 if (hdr
->bfd_section
!= NULL
3775 && hdr
->bfd_section
->filepos
!= 0)
3776 hdr
->sh_offset
= hdr
->bfd_section
->filepos
;
3777 else if ((hdr
->sh_flags
& SHF_ALLOC
) != 0)
3779 ((*_bfd_error_handler
)
3780 (_("%s: warning: allocated section `%s' not in segment"),
3781 bfd_get_filename (abfd
),
3782 (hdr
->bfd_section
== NULL
3784 : hdr
->bfd_section
->name
)));
3785 if ((abfd
->flags
& D_PAGED
) != 0)
3786 off
+= (hdr
->sh_addr
- off
) % bed
->maxpagesize
;
3788 off
+= (hdr
->sh_addr
- off
) % hdr
->sh_addralign
;
3789 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
,
3792 else if (hdr
->sh_type
== SHT_REL
3793 || hdr
->sh_type
== SHT_RELA
3794 || hdr
== i_shdrpp
[tdata
->symtab_section
]
3795 || hdr
== i_shdrpp
[tdata
->symtab_shndx_section
]
3796 || hdr
== i_shdrpp
[tdata
->strtab_section
])
3797 hdr
->sh_offset
= -1;
3799 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, true);
3801 if (i
== SHN_LORESERVE
- 1)
3803 i
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
3804 hdrpp
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
3809 /* Place the section headers. */
3810 off
= align_file_position (off
, bed
->s
->file_align
);
3811 i_ehdrp
->e_shoff
= off
;
3812 off
+= i_ehdrp
->e_shnum
* i_ehdrp
->e_shentsize
;
3814 elf_tdata (abfd
)->next_file_pos
= off
;
3823 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
3824 Elf_Internal_Phdr
*i_phdrp
= 0; /* Program header table, internal form */
3825 Elf_Internal_Shdr
**i_shdrp
; /* Section header table, internal form */
3827 struct elf_strtab_hash
*shstrtab
;
3828 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3830 i_ehdrp
= elf_elfheader (abfd
);
3831 i_shdrp
= elf_elfsections (abfd
);
3833 shstrtab
= _bfd_elf_strtab_init ();
3834 if (shstrtab
== NULL
)
3837 elf_shstrtab (abfd
) = shstrtab
;
3839 i_ehdrp
->e_ident
[EI_MAG0
] = ELFMAG0
;
3840 i_ehdrp
->e_ident
[EI_MAG1
] = ELFMAG1
;
3841 i_ehdrp
->e_ident
[EI_MAG2
] = ELFMAG2
;
3842 i_ehdrp
->e_ident
[EI_MAG3
] = ELFMAG3
;
3844 i_ehdrp
->e_ident
[EI_CLASS
] = bed
->s
->elfclass
;
3845 i_ehdrp
->e_ident
[EI_DATA
] =
3846 bfd_big_endian (abfd
) ? ELFDATA2MSB
: ELFDATA2LSB
;
3847 i_ehdrp
->e_ident
[EI_VERSION
] = bed
->s
->ev_current
;
3849 i_ehdrp
->e_ident
[EI_OSABI
] = ELFOSABI_NONE
;
3850 i_ehdrp
->e_ident
[EI_ABIVERSION
] = 0;
3852 for (count
= EI_PAD
; count
< EI_NIDENT
; count
++)
3853 i_ehdrp
->e_ident
[count
] = 0;
3855 if ((abfd
->flags
& DYNAMIC
) != 0)
3856 i_ehdrp
->e_type
= ET_DYN
;
3857 else if ((abfd
->flags
& EXEC_P
) != 0)
3858 i_ehdrp
->e_type
= ET_EXEC
;
3859 else if (bfd_get_format (abfd
) == bfd_core
)
3860 i_ehdrp
->e_type
= ET_CORE
;
3862 i_ehdrp
->e_type
= ET_REL
;
3864 switch (bfd_get_arch (abfd
))
3866 case bfd_arch_unknown
:
3867 i_ehdrp
->e_machine
= EM_NONE
;
3870 /* There used to be a long list of cases here, each one setting
3871 e_machine to the same EM_* macro #defined as ELF_MACHINE_CODE
3872 in the corresponding bfd definition. To avoid duplication,
3873 the switch was removed. Machines that need special handling
3874 can generally do it in elf_backend_final_write_processing(),
3875 unless they need the information earlier than the final write.
3876 Such need can generally be supplied by replacing the tests for
3877 e_machine with the conditions used to determine it. */
3879 if (get_elf_backend_data (abfd
) != NULL
)
3880 i_ehdrp
->e_machine
= get_elf_backend_data (abfd
)->elf_machine_code
;
3882 i_ehdrp
->e_machine
= EM_NONE
;
3885 i_ehdrp
->e_version
= bed
->s
->ev_current
;
3886 i_ehdrp
->e_ehsize
= bed
->s
->sizeof_ehdr
;
3888 /* No program header, for now. */
3889 i_ehdrp
->e_phoff
= 0;
3890 i_ehdrp
->e_phentsize
= 0;
3891 i_ehdrp
->e_phnum
= 0;
3893 /* Each bfd section is section header entry. */
3894 i_ehdrp
->e_entry
= bfd_get_start_address (abfd
);
3895 i_ehdrp
->e_shentsize
= bed
->s
->sizeof_shdr
;
3897 /* If we're building an executable, we'll need a program header table. */
3898 if (abfd
->flags
& EXEC_P
)
3900 /* It all happens later. */
3902 i_ehdrp
->e_phentsize
= sizeof (Elf_External_Phdr
);
3904 /* elf_build_phdrs() returns a (NULL-terminated) array of
3905 Elf_Internal_Phdrs. */
3906 i_phdrp
= elf_build_phdrs (abfd
, i_ehdrp
, i_shdrp
, &i_ehdrp
->e_phnum
);
3907 i_ehdrp
->e_phoff
= outbase
;
3908 outbase
+= i_ehdrp
->e_phentsize
* i_ehdrp
->e_phnum
;
3913 i_ehdrp
->e_phentsize
= 0;
3915 i_ehdrp
->e_phoff
= 0;
3918 elf_tdata (abfd
)->symtab_hdr
.sh_name
=
3919 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".symtab", false);
3920 elf_tdata (abfd
)->strtab_hdr
.sh_name
=
3921 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".strtab", false);
3922 elf_tdata (abfd
)->shstrtab_hdr
.sh_name
=
3923 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".shstrtab", false);
3924 if (elf_tdata (abfd
)->symtab_hdr
.sh_name
== (unsigned int) -1
3925 || elf_tdata (abfd
)->symtab_hdr
.sh_name
== (unsigned int) -1
3926 || elf_tdata (abfd
)->shstrtab_hdr
.sh_name
== (unsigned int) -1)
3932 /* Assign file positions for all the reloc sections which are not part
3933 of the loadable file image. */
3936 _bfd_elf_assign_file_positions_for_relocs (abfd
)
3940 unsigned int i
, num_sec
;
3941 Elf_Internal_Shdr
**shdrpp
;
3943 off
= elf_tdata (abfd
)->next_file_pos
;
3945 num_sec
= elf_numsections (abfd
);
3946 for (i
= 1, shdrpp
= elf_elfsections (abfd
) + 1; i
< num_sec
; i
++, shdrpp
++)
3948 Elf_Internal_Shdr
*shdrp
;
3951 if ((shdrp
->sh_type
== SHT_REL
|| shdrp
->sh_type
== SHT_RELA
)
3952 && shdrp
->sh_offset
== -1)
3953 off
= _bfd_elf_assign_file_position_for_section (shdrp
, off
, true);
3956 elf_tdata (abfd
)->next_file_pos
= off
;
3960 _bfd_elf_write_object_contents (abfd
)
3963 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3964 Elf_Internal_Ehdr
*i_ehdrp
;
3965 Elf_Internal_Shdr
**i_shdrp
;
3967 unsigned int count
, num_sec
;
3969 if (! abfd
->output_has_begun
3970 && ! _bfd_elf_compute_section_file_positions
3971 (abfd
, (struct bfd_link_info
*) NULL
))
3974 i_shdrp
= elf_elfsections (abfd
);
3975 i_ehdrp
= elf_elfheader (abfd
);
3978 bfd_map_over_sections (abfd
, bed
->s
->write_relocs
, &failed
);
3982 _bfd_elf_assign_file_positions_for_relocs (abfd
);
3984 /* After writing the headers, we need to write the sections too... */
3985 num_sec
= elf_numsections (abfd
);
3986 for (count
= 1; count
< num_sec
; count
++)
3988 if (bed
->elf_backend_section_processing
)
3989 (*bed
->elf_backend_section_processing
) (abfd
, i_shdrp
[count
]);
3990 if (i_shdrp
[count
]->contents
)
3992 bfd_size_type amt
= i_shdrp
[count
]->sh_size
;
3994 if (bfd_seek (abfd
, i_shdrp
[count
]->sh_offset
, SEEK_SET
) != 0
3995 || bfd_bwrite (i_shdrp
[count
]->contents
, amt
, abfd
) != amt
)
3998 if (count
== SHN_LORESERVE
- 1)
3999 count
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4002 /* Write out the section header names. */
4003 if (bfd_seek (abfd
, elf_tdata (abfd
)->shstrtab_hdr
.sh_offset
, SEEK_SET
) != 0
4004 || ! _bfd_elf_strtab_emit (abfd
, elf_shstrtab (abfd
)))
4007 if (bed
->elf_backend_final_write_processing
)
4008 (*bed
->elf_backend_final_write_processing
) (abfd
,
4009 elf_tdata (abfd
)->linker
);
4011 return bed
->s
->write_shdrs_and_ehdr (abfd
);
4015 _bfd_elf_write_corefile_contents (abfd
)
4018 /* Hopefully this can be done just like an object file. */
4019 return _bfd_elf_write_object_contents (abfd
);
4022 /* Given a section, search the header to find them. */
4025 _bfd_elf_section_from_bfd_section (abfd
, asect
)
4029 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4030 Elf_Internal_Shdr
**i_shdrp
= elf_elfsections (abfd
);
4032 Elf_Internal_Shdr
*hdr
;
4033 int maxindex
= elf_numsections (abfd
);
4035 if (elf_section_data (asect
) != NULL
4036 && elf_section_data (asect
)->this_idx
!= 0)
4037 return elf_section_data (asect
)->this_idx
;
4039 if (bfd_is_abs_section (asect
))
4041 if (bfd_is_com_section (asect
))
4043 if (bfd_is_und_section (asect
))
4046 for (index
= 1; index
< maxindex
; index
++)
4048 hdr
= i_shdrp
[index
];
4049 if (hdr
!= NULL
&& hdr
->bfd_section
== asect
)
4053 if (bed
->elf_backend_section_from_bfd_section
)
4055 for (index
= 0; index
< maxindex
; index
++)
4059 hdr
= i_shdrp
[index
];
4064 if ((*bed
->elf_backend_section_from_bfd_section
)
4065 (abfd
, hdr
, asect
, &retval
))
4070 bfd_set_error (bfd_error_nonrepresentable_section
);
4075 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
4079 _bfd_elf_symbol_from_bfd_symbol (abfd
, asym_ptr_ptr
)
4081 asymbol
**asym_ptr_ptr
;
4083 asymbol
*asym_ptr
= *asym_ptr_ptr
;
4085 flagword flags
= asym_ptr
->flags
;
4087 /* When gas creates relocations against local labels, it creates its
4088 own symbol for the section, but does put the symbol into the
4089 symbol chain, so udata is 0. When the linker is generating
4090 relocatable output, this section symbol may be for one of the
4091 input sections rather than the output section. */
4092 if (asym_ptr
->udata
.i
== 0
4093 && (flags
& BSF_SECTION_SYM
)
4094 && asym_ptr
->section
)
4098 if (asym_ptr
->section
->output_section
!= NULL
)
4099 indx
= asym_ptr
->section
->output_section
->index
;
4101 indx
= asym_ptr
->section
->index
;
4102 if (indx
< elf_num_section_syms (abfd
)
4103 && elf_section_syms (abfd
)[indx
] != NULL
)
4104 asym_ptr
->udata
.i
= elf_section_syms (abfd
)[indx
]->udata
.i
;
4107 idx
= asym_ptr
->udata
.i
;
4111 /* This case can occur when using --strip-symbol on a symbol
4112 which is used in a relocation entry. */
4113 (*_bfd_error_handler
)
4114 (_("%s: symbol `%s' required but not present"),
4115 bfd_archive_filename (abfd
), bfd_asymbol_name (asym_ptr
));
4116 bfd_set_error (bfd_error_no_symbols
);
4123 _("elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n"),
4124 (long) asym_ptr
, asym_ptr
->name
, idx
, flags
,
4125 elf_symbol_flags (flags
));
4133 /* Copy private BFD data. This copies any program header information. */
4136 copy_private_bfd_data (ibfd
, obfd
)
4140 Elf_Internal_Ehdr
* iehdr
;
4141 struct elf_segment_map
* map
;
4142 struct elf_segment_map
* map_first
;
4143 struct elf_segment_map
** pointer_to_map
;
4144 Elf_Internal_Phdr
* segment
;
4147 unsigned int num_segments
;
4148 boolean phdr_included
= false;
4149 bfd_vma maxpagesize
;
4150 struct elf_segment_map
* phdr_adjust_seg
= NULL
;
4151 unsigned int phdr_adjust_num
= 0;
4153 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
4154 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
4157 if (elf_tdata (ibfd
)->phdr
== NULL
)
4160 iehdr
= elf_elfheader (ibfd
);
4163 pointer_to_map
= &map_first
;
4165 num_segments
= elf_elfheader (ibfd
)->e_phnum
;
4166 maxpagesize
= get_elf_backend_data (obfd
)->maxpagesize
;
4168 /* Returns the end address of the segment + 1. */
4169 #define SEGMENT_END(segment, start) \
4170 (start + (segment->p_memsz > segment->p_filesz \
4171 ? segment->p_memsz : segment->p_filesz))
4173 /* Returns true if the given section is contained within
4174 the given segment. VMA addresses are compared. */
4175 #define IS_CONTAINED_BY_VMA(section, segment) \
4176 (section->vma >= segment->p_vaddr \
4177 && (section->vma + section->_raw_size) \
4178 <= (SEGMENT_END (segment, segment->p_vaddr)))
4180 /* Returns true if the given section is contained within
4181 the given segment. LMA addresses are compared. */
4182 #define IS_CONTAINED_BY_LMA(section, segment, base) \
4183 (section->lma >= base \
4184 && (section->lma + section->_raw_size) \
4185 <= SEGMENT_END (segment, base))
4187 /* Special case: corefile "NOTE" section containing regs, prpsinfo etc. */
4188 #define IS_COREFILE_NOTE(p, s) \
4189 (p->p_type == PT_NOTE \
4190 && bfd_get_format (ibfd) == bfd_core \
4191 && s->vma == 0 && s->lma == 0 \
4192 && (bfd_vma) s->filepos >= p->p_offset \
4193 && (bfd_vma) s->filepos + s->_raw_size \
4194 <= p->p_offset + p->p_filesz)
4196 /* The complicated case when p_vaddr is 0 is to handle the Solaris
4197 linker, which generates a PT_INTERP section with p_vaddr and
4198 p_memsz set to 0. */
4199 #define IS_SOLARIS_PT_INTERP(p, s) \
4201 && p->p_filesz > 0 \
4202 && (s->flags & SEC_HAS_CONTENTS) != 0 \
4203 && s->_raw_size > 0 \
4204 && (bfd_vma) s->filepos >= p->p_offset \
4205 && ((bfd_vma) s->filepos + s->_raw_size \
4206 <= p->p_offset + p->p_filesz))
4208 /* Decide if the given section should be included in the given segment.
4209 A section will be included if:
4210 1. It is within the address space of the segment -- we use the LMA
4211 if that is set for the segment and the VMA otherwise,
4212 2. It is an allocated segment,
4213 3. There is an output section associated with it,
4214 4. The section has not already been allocated to a previous segment. */
4215 #define INCLUDE_SECTION_IN_SEGMENT(section, segment) \
4216 (((((segment->p_paddr \
4217 ? IS_CONTAINED_BY_LMA (section, segment, segment->p_paddr) \
4218 : IS_CONTAINED_BY_VMA (section, segment)) \
4219 || IS_SOLARIS_PT_INTERP (segment, section)) \
4220 && (section->flags & SEC_ALLOC) != 0) \
4221 || IS_COREFILE_NOTE (segment, section)) \
4222 && section->output_section != NULL \
4223 && section->segment_mark == false)
4225 /* Returns true iff seg1 starts after the end of seg2. */
4226 #define SEGMENT_AFTER_SEGMENT(seg1, seg2) \
4227 (seg1->p_vaddr >= SEGMENT_END (seg2, seg2->p_vaddr))
4229 /* Returns true iff seg1 and seg2 overlap. */
4230 #define SEGMENT_OVERLAPS(seg1, seg2) \
4231 (!(SEGMENT_AFTER_SEGMENT (seg1, seg2) || SEGMENT_AFTER_SEGMENT (seg2, seg1)))
4233 /* Initialise the segment mark field. */
4234 for (section
= ibfd
->sections
; section
!= NULL
; section
= section
->next
)
4235 section
->segment_mark
= false;
4237 /* Scan through the segments specified in the program header
4238 of the input BFD. For this first scan we look for overlaps
4239 in the loadable segments. These can be created by weird
4240 parameters to objcopy. */
4241 for (i
= 0, segment
= elf_tdata (ibfd
)->phdr
;
4246 Elf_Internal_Phdr
*segment2
;
4248 if (segment
->p_type
!= PT_LOAD
)
4251 /* Determine if this segment overlaps any previous segments. */
4252 for (j
= 0, segment2
= elf_tdata (ibfd
)->phdr
; j
< i
; j
++, segment2
++)
4254 bfd_signed_vma extra_length
;
4256 if (segment2
->p_type
!= PT_LOAD
4257 || ! SEGMENT_OVERLAPS (segment
, segment2
))
4260 /* Merge the two segments together. */
4261 if (segment2
->p_vaddr
< segment
->p_vaddr
)
4263 /* Extend SEGMENT2 to include SEGMENT and then delete
4266 SEGMENT_END (segment
, segment
->p_vaddr
)
4267 - SEGMENT_END (segment2
, segment2
->p_vaddr
);
4269 if (extra_length
> 0)
4271 segment2
->p_memsz
+= extra_length
;
4272 segment2
->p_filesz
+= extra_length
;
4275 segment
->p_type
= PT_NULL
;
4277 /* Since we have deleted P we must restart the outer loop. */
4279 segment
= elf_tdata (ibfd
)->phdr
;
4284 /* Extend SEGMENT to include SEGMENT2 and then delete
4287 SEGMENT_END (segment2
, segment2
->p_vaddr
)
4288 - SEGMENT_END (segment
, segment
->p_vaddr
);
4290 if (extra_length
> 0)
4292 segment
->p_memsz
+= extra_length
;
4293 segment
->p_filesz
+= extra_length
;
4296 segment2
->p_type
= PT_NULL
;
4301 /* The second scan attempts to assign sections to segments. */
4302 for (i
= 0, segment
= elf_tdata (ibfd
)->phdr
;
4306 unsigned int section_count
;
4307 asection
** sections
;
4308 asection
* output_section
;
4310 bfd_vma matching_lma
;
4311 bfd_vma suggested_lma
;
4315 if (segment
->p_type
== PT_NULL
)
4318 /* Compute how many sections might be placed into this segment. */
4320 for (section
= ibfd
->sections
; section
!= NULL
; section
= section
->next
)
4321 if (INCLUDE_SECTION_IN_SEGMENT (section
, segment
))
4324 /* Allocate a segment map big enough to contain all of the
4325 sections we have selected. */
4326 amt
= sizeof (struct elf_segment_map
);
4327 amt
+= ((bfd_size_type
) section_count
- 1) * sizeof (asection
*);
4328 map
= (struct elf_segment_map
*) bfd_alloc (obfd
, amt
);
4332 /* Initialise the fields of the segment map. Default to
4333 using the physical address of the segment in the input BFD. */
4335 map
->p_type
= segment
->p_type
;
4336 map
->p_flags
= segment
->p_flags
;
4337 map
->p_flags_valid
= 1;
4338 map
->p_paddr
= segment
->p_paddr
;
4339 map
->p_paddr_valid
= 1;
4341 /* Determine if this segment contains the ELF file header
4342 and if it contains the program headers themselves. */
4343 map
->includes_filehdr
= (segment
->p_offset
== 0
4344 && segment
->p_filesz
>= iehdr
->e_ehsize
);
4346 map
->includes_phdrs
= 0;
4348 if (! phdr_included
|| segment
->p_type
!= PT_LOAD
)
4350 map
->includes_phdrs
=
4351 (segment
->p_offset
<= (bfd_vma
) iehdr
->e_phoff
4352 && (segment
->p_offset
+ segment
->p_filesz
4353 >= ((bfd_vma
) iehdr
->e_phoff
4354 + iehdr
->e_phnum
* iehdr
->e_phentsize
)));
4356 if (segment
->p_type
== PT_LOAD
&& map
->includes_phdrs
)
4357 phdr_included
= true;
4360 if (section_count
== 0)
4362 /* Special segments, such as the PT_PHDR segment, may contain
4363 no sections, but ordinary, loadable segments should contain
4365 if (segment
->p_type
== PT_LOAD
)
4367 (_("%s: warning: Empty loadable segment detected\n"),
4368 bfd_archive_filename (ibfd
));
4371 *pointer_to_map
= map
;
4372 pointer_to_map
= &map
->next
;
4377 /* Now scan the sections in the input BFD again and attempt
4378 to add their corresponding output sections to the segment map.
4379 The problem here is how to handle an output section which has
4380 been moved (ie had its LMA changed). There are four possibilities:
4382 1. None of the sections have been moved.
4383 In this case we can continue to use the segment LMA from the
4386 2. All of the sections have been moved by the same amount.
4387 In this case we can change the segment's LMA to match the LMA
4388 of the first section.
4390 3. Some of the sections have been moved, others have not.
4391 In this case those sections which have not been moved can be
4392 placed in the current segment which will have to have its size,
4393 and possibly its LMA changed, and a new segment or segments will
4394 have to be created to contain the other sections.
4396 4. The sections have been moved, but not be the same amount.
4397 In this case we can change the segment's LMA to match the LMA
4398 of the first section and we will have to create a new segment
4399 or segments to contain the other sections.
4401 In order to save time, we allocate an array to hold the section
4402 pointers that we are interested in. As these sections get assigned
4403 to a segment, they are removed from this array. */
4405 amt
= (bfd_size_type
) section_count
* sizeof (asection
*);
4406 sections
= (asection
**) bfd_malloc (amt
);
4407 if (sections
== NULL
)
4410 /* Step One: Scan for segment vs section LMA conflicts.
4411 Also add the sections to the section array allocated above.
4412 Also add the sections to the current segment. In the common
4413 case, where the sections have not been moved, this means that
4414 we have completely filled the segment, and there is nothing
4420 for (j
= 0, section
= ibfd
->sections
;
4422 section
= section
->next
)
4424 if (INCLUDE_SECTION_IN_SEGMENT (section
, segment
))
4426 output_section
= section
->output_section
;
4428 sections
[j
++] = section
;
4430 /* The Solaris native linker always sets p_paddr to 0.
4431 We try to catch that case here, and set it to the
4433 if (segment
->p_paddr
== 0
4434 && segment
->p_vaddr
!= 0
4436 && output_section
->lma
!= 0
4437 && (output_section
->vma
== (segment
->p_vaddr
4438 + (map
->includes_filehdr
4441 + (map
->includes_phdrs
4443 * iehdr
->e_phentsize
)
4445 map
->p_paddr
= segment
->p_vaddr
;
4447 /* Match up the physical address of the segment with the
4448 LMA address of the output section. */
4449 if (IS_CONTAINED_BY_LMA (output_section
, segment
, map
->p_paddr
)
4450 || IS_COREFILE_NOTE (segment
, section
))
4452 if (matching_lma
== 0)
4453 matching_lma
= output_section
->lma
;
4455 /* We assume that if the section fits within the segment
4456 then it does not overlap any other section within that
4458 map
->sections
[isec
++] = output_section
;
4460 else if (suggested_lma
== 0)
4461 suggested_lma
= output_section
->lma
;
4465 BFD_ASSERT (j
== section_count
);
4467 /* Step Two: Adjust the physical address of the current segment,
4469 if (isec
== section_count
)
4471 /* All of the sections fitted within the segment as currently
4472 specified. This is the default case. Add the segment to
4473 the list of built segments and carry on to process the next
4474 program header in the input BFD. */
4475 map
->count
= section_count
;
4476 *pointer_to_map
= map
;
4477 pointer_to_map
= &map
->next
;
4484 if (matching_lma
!= 0)
4486 /* At least one section fits inside the current segment.
4487 Keep it, but modify its physical address to match the
4488 LMA of the first section that fitted. */
4489 map
->p_paddr
= matching_lma
;
4493 /* None of the sections fitted inside the current segment.
4494 Change the current segment's physical address to match
4495 the LMA of the first section. */
4496 map
->p_paddr
= suggested_lma
;
4499 /* Offset the segment physical address from the lma
4500 to allow for space taken up by elf headers. */
4501 if (map
->includes_filehdr
)
4502 map
->p_paddr
-= iehdr
->e_ehsize
;
4504 if (map
->includes_phdrs
)
4506 map
->p_paddr
-= iehdr
->e_phnum
* iehdr
->e_phentsize
;
4508 /* iehdr->e_phnum is just an estimate of the number
4509 of program headers that we will need. Make a note
4510 here of the number we used and the segment we chose
4511 to hold these headers, so that we can adjust the
4512 offset when we know the correct value. */
4513 phdr_adjust_num
= iehdr
->e_phnum
;
4514 phdr_adjust_seg
= map
;
4518 /* Step Three: Loop over the sections again, this time assigning
4519 those that fit to the current segment and remvoing them from the
4520 sections array; but making sure not to leave large gaps. Once all
4521 possible sections have been assigned to the current segment it is
4522 added to the list of built segments and if sections still remain
4523 to be assigned, a new segment is constructed before repeating
4531 /* Fill the current segment with sections that fit. */
4532 for (j
= 0; j
< section_count
; j
++)
4534 section
= sections
[j
];
4536 if (section
== NULL
)
4539 output_section
= section
->output_section
;
4541 BFD_ASSERT (output_section
!= NULL
);
4543 if (IS_CONTAINED_BY_LMA (output_section
, segment
, map
->p_paddr
)
4544 || IS_COREFILE_NOTE (segment
, section
))
4546 if (map
->count
== 0)
4548 /* If the first section in a segment does not start at
4549 the beginning of the segment, then something is
4551 if (output_section
->lma
!=
4553 + (map
->includes_filehdr
? iehdr
->e_ehsize
: 0)
4554 + (map
->includes_phdrs
4555 ? iehdr
->e_phnum
* iehdr
->e_phentsize
4561 asection
* prev_sec
;
4563 prev_sec
= map
->sections
[map
->count
- 1];
4565 /* If the gap between the end of the previous section
4566 and the start of this section is more than
4567 maxpagesize then we need to start a new segment. */
4568 if ((BFD_ALIGN (prev_sec
->lma
+ prev_sec
->_raw_size
,
4570 < BFD_ALIGN (output_section
->lma
, maxpagesize
))
4571 || ((prev_sec
->lma
+ prev_sec
->_raw_size
)
4572 > output_section
->lma
))
4574 if (suggested_lma
== 0)
4575 suggested_lma
= output_section
->lma
;
4581 map
->sections
[map
->count
++] = output_section
;
4584 section
->segment_mark
= true;
4586 else if (suggested_lma
== 0)
4587 suggested_lma
= output_section
->lma
;
4590 BFD_ASSERT (map
->count
> 0);
4592 /* Add the current segment to the list of built segments. */
4593 *pointer_to_map
= map
;
4594 pointer_to_map
= &map
->next
;
4596 if (isec
< section_count
)
4598 /* We still have not allocated all of the sections to
4599 segments. Create a new segment here, initialise it
4600 and carry on looping. */
4601 amt
= sizeof (struct elf_segment_map
);
4602 amt
+= ((bfd_size_type
) section_count
- 1) * sizeof (asection
*);
4603 map
= (struct elf_segment_map
*) bfd_alloc (obfd
, amt
);
4607 /* Initialise the fields of the segment map. Set the physical
4608 physical address to the LMA of the first section that has
4609 not yet been assigned. */
4611 map
->p_type
= segment
->p_type
;
4612 map
->p_flags
= segment
->p_flags
;
4613 map
->p_flags_valid
= 1;
4614 map
->p_paddr
= suggested_lma
;
4615 map
->p_paddr_valid
= 1;
4616 map
->includes_filehdr
= 0;
4617 map
->includes_phdrs
= 0;
4620 while (isec
< section_count
);
4625 /* The Solaris linker creates program headers in which all the
4626 p_paddr fields are zero. When we try to objcopy or strip such a
4627 file, we get confused. Check for this case, and if we find it
4628 reset the p_paddr_valid fields. */
4629 for (map
= map_first
; map
!= NULL
; map
= map
->next
)
4630 if (map
->p_paddr
!= 0)
4634 for (map
= map_first
; map
!= NULL
; map
= map
->next
)
4635 map
->p_paddr_valid
= 0;
4638 elf_tdata (obfd
)->segment_map
= map_first
;
4640 /* If we had to estimate the number of program headers that were
4641 going to be needed, then check our estimate now and adjust
4642 the offset if necessary. */
4643 if (phdr_adjust_seg
!= NULL
)
4647 for (count
= 0, map
= map_first
; map
!= NULL
; map
= map
->next
)
4650 if (count
> phdr_adjust_num
)
4651 phdr_adjust_seg
->p_paddr
4652 -= (count
- phdr_adjust_num
) * iehdr
->e_phentsize
;
4656 /* Final Step: Sort the segments into ascending order of physical
4658 if (map_first
!= NULL
)
4660 struct elf_segment_map
*prev
;
4663 for (map
= map_first
->next
; map
!= NULL
; prev
= map
, map
= map
->next
)
4665 /* Yes I know - its a bubble sort.... */
4666 if (map
->next
!= NULL
&& (map
->next
->p_paddr
< map
->p_paddr
))
4668 /* Swap map and map->next. */
4669 prev
->next
= map
->next
;
4670 map
->next
= map
->next
->next
;
4671 prev
->next
->next
= map
;
4681 #undef IS_CONTAINED_BY_VMA
4682 #undef IS_CONTAINED_BY_LMA
4683 #undef IS_COREFILE_NOTE
4684 #undef IS_SOLARIS_PT_INTERP
4685 #undef INCLUDE_SECTION_IN_SEGMENT
4686 #undef SEGMENT_AFTER_SEGMENT
4687 #undef SEGMENT_OVERLAPS
4691 /* Copy private section information. This copies over the entsize
4692 field, and sometimes the info field. */
4695 _bfd_elf_copy_private_section_data (ibfd
, isec
, obfd
, osec
)
4701 Elf_Internal_Shdr
*ihdr
, *ohdr
;
4703 if (ibfd
->xvec
->flavour
!= bfd_target_elf_flavour
4704 || obfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
4707 /* Copy over private BFD data if it has not already been copied.
4708 This must be done here, rather than in the copy_private_bfd_data
4709 entry point, because the latter is called after the section
4710 contents have been set, which means that the program headers have
4711 already been worked out. */
4712 if (elf_tdata (obfd
)->segment_map
== NULL
4713 && elf_tdata (ibfd
)->phdr
!= NULL
)
4717 /* Only set up the segments if there are no more SEC_ALLOC
4718 sections. FIXME: This won't do the right thing if objcopy is
4719 used to remove the last SEC_ALLOC section, since objcopy
4720 won't call this routine in that case. */
4721 for (s
= isec
->next
; s
!= NULL
; s
= s
->next
)
4722 if ((s
->flags
& SEC_ALLOC
) != 0)
4726 if (! copy_private_bfd_data (ibfd
, obfd
))
4731 ihdr
= &elf_section_data (isec
)->this_hdr
;
4732 ohdr
= &elf_section_data (osec
)->this_hdr
;
4734 ohdr
->sh_entsize
= ihdr
->sh_entsize
;
4736 if (ihdr
->sh_type
== SHT_SYMTAB
4737 || ihdr
->sh_type
== SHT_DYNSYM
4738 || ihdr
->sh_type
== SHT_GNU_verneed
4739 || ihdr
->sh_type
== SHT_GNU_verdef
)
4740 ohdr
->sh_info
= ihdr
->sh_info
;
4742 elf_section_data (osec
)->use_rela_p
4743 = elf_section_data (isec
)->use_rela_p
;
4748 /* Copy private symbol information. If this symbol is in a section
4749 which we did not map into a BFD section, try to map the section
4750 index correctly. We use special macro definitions for the mapped
4751 section indices; these definitions are interpreted by the
4752 swap_out_syms function. */
4754 #define MAP_ONESYMTAB (SHN_HIOS + 1)
4755 #define MAP_DYNSYMTAB (SHN_HIOS + 2)
4756 #define MAP_STRTAB (SHN_HIOS + 3)
4757 #define MAP_SHSTRTAB (SHN_HIOS + 4)
4758 #define MAP_SYM_SHNDX (SHN_HIOS + 5)
4761 _bfd_elf_copy_private_symbol_data (ibfd
, isymarg
, obfd
, osymarg
)
4767 elf_symbol_type
*isym
, *osym
;
4769 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
4770 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
4773 isym
= elf_symbol_from (ibfd
, isymarg
);
4774 osym
= elf_symbol_from (obfd
, osymarg
);
4778 && bfd_is_abs_section (isym
->symbol
.section
))
4782 shndx
= isym
->internal_elf_sym
.st_shndx
;
4783 if (shndx
== elf_onesymtab (ibfd
))
4784 shndx
= MAP_ONESYMTAB
;
4785 else if (shndx
== elf_dynsymtab (ibfd
))
4786 shndx
= MAP_DYNSYMTAB
;
4787 else if (shndx
== elf_tdata (ibfd
)->strtab_section
)
4789 else if (shndx
== elf_tdata (ibfd
)->shstrtab_section
)
4790 shndx
= MAP_SHSTRTAB
;
4791 else if (shndx
== elf_tdata (ibfd
)->symtab_shndx_section
)
4792 shndx
= MAP_SYM_SHNDX
;
4793 osym
->internal_elf_sym
.st_shndx
= shndx
;
4799 /* Swap out the symbols. */
4802 swap_out_syms (abfd
, sttp
, relocatable_p
)
4804 struct bfd_strtab_hash
**sttp
;
4807 struct elf_backend_data
*bed
;
4810 struct bfd_strtab_hash
*stt
;
4811 Elf_Internal_Shdr
*symtab_hdr
;
4812 Elf_Internal_Shdr
*symtab_shndx_hdr
;
4813 Elf_Internal_Shdr
*symstrtab_hdr
;
4814 char *outbound_syms
;
4815 char *outbound_shndx
;
4819 if (!elf_map_symbols (abfd
))
4822 /* Dump out the symtabs. */
4823 stt
= _bfd_elf_stringtab_init ();
4827 bed
= get_elf_backend_data (abfd
);
4828 symcount
= bfd_get_symcount (abfd
);
4829 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
4830 symtab_hdr
->sh_type
= SHT_SYMTAB
;
4831 symtab_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
4832 symtab_hdr
->sh_size
= symtab_hdr
->sh_entsize
* (symcount
+ 1);
4833 symtab_hdr
->sh_info
= elf_num_locals (abfd
) + 1;
4834 symtab_hdr
->sh_addralign
= bed
->s
->file_align
;
4836 symstrtab_hdr
= &elf_tdata (abfd
)->strtab_hdr
;
4837 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
4839 amt
= (bfd_size_type
) (1 + symcount
) * bed
->s
->sizeof_sym
;
4840 outbound_syms
= bfd_alloc (abfd
, amt
);
4841 if (outbound_syms
== NULL
)
4843 symtab_hdr
->contents
= (PTR
) outbound_syms
;
4845 outbound_shndx
= NULL
;
4846 symtab_shndx_hdr
= &elf_tdata (abfd
)->symtab_shndx_hdr
;
4847 if (symtab_shndx_hdr
->sh_name
!= 0)
4849 amt
= (bfd_size_type
) (1 + symcount
) * sizeof (Elf_External_Sym_Shndx
);
4850 outbound_shndx
= bfd_alloc (abfd
, amt
);
4851 if (outbound_shndx
== NULL
)
4853 memset (outbound_shndx
, 0, (unsigned long) amt
);
4854 symtab_shndx_hdr
->contents
= outbound_shndx
;
4855 symtab_shndx_hdr
->sh_type
= SHT_SYMTAB_SHNDX
;
4856 symtab_shndx_hdr
->sh_size
= amt
;
4857 symtab_shndx_hdr
->sh_addralign
= sizeof (Elf_External_Sym_Shndx
);
4858 symtab_shndx_hdr
->sh_entsize
= sizeof (Elf_External_Sym_Shndx
);
4861 /* now generate the data (for "contents") */
4863 /* Fill in zeroth symbol and swap it out. */
4864 Elf_Internal_Sym sym
;
4870 sym
.st_shndx
= SHN_UNDEF
;
4871 bed
->s
->swap_symbol_out (abfd
, &sym
, outbound_syms
, outbound_shndx
);
4872 outbound_syms
+= bed
->s
->sizeof_sym
;
4873 if (outbound_shndx
!= NULL
)
4874 outbound_shndx
+= sizeof (Elf_External_Sym_Shndx
);
4877 syms
= bfd_get_outsymbols (abfd
);
4878 for (idx
= 0; idx
< symcount
; idx
++)
4880 Elf_Internal_Sym sym
;
4881 bfd_vma value
= syms
[idx
]->value
;
4882 elf_symbol_type
*type_ptr
;
4883 flagword flags
= syms
[idx
]->flags
;
4886 if ((flags
& (BSF_SECTION_SYM
| BSF_GLOBAL
)) == BSF_SECTION_SYM
)
4888 /* Local section symbols have no name. */
4893 sym
.st_name
= (unsigned long) _bfd_stringtab_add (stt
,
4896 if (sym
.st_name
== (unsigned long) -1)
4900 type_ptr
= elf_symbol_from (abfd
, syms
[idx
]);
4902 if ((flags
& BSF_SECTION_SYM
) == 0
4903 && bfd_is_com_section (syms
[idx
]->section
))
4905 /* ELF common symbols put the alignment into the `value' field,
4906 and the size into the `size' field. This is backwards from
4907 how BFD handles it, so reverse it here. */
4908 sym
.st_size
= value
;
4909 if (type_ptr
== NULL
4910 || type_ptr
->internal_elf_sym
.st_value
== 0)
4911 sym
.st_value
= value
>= 16 ? 16 : (1 << bfd_log2 (value
));
4913 sym
.st_value
= type_ptr
->internal_elf_sym
.st_value
;
4914 sym
.st_shndx
= _bfd_elf_section_from_bfd_section
4915 (abfd
, syms
[idx
]->section
);
4919 asection
*sec
= syms
[idx
]->section
;
4922 if (sec
->output_section
)
4924 value
+= sec
->output_offset
;
4925 sec
= sec
->output_section
;
4927 /* Don't add in the section vma for relocatable output. */
4928 if (! relocatable_p
)
4930 sym
.st_value
= value
;
4931 sym
.st_size
= type_ptr
? type_ptr
->internal_elf_sym
.st_size
: 0;
4933 if (bfd_is_abs_section (sec
)
4935 && type_ptr
->internal_elf_sym
.st_shndx
!= 0)
4937 /* This symbol is in a real ELF section which we did
4938 not create as a BFD section. Undo the mapping done
4939 by copy_private_symbol_data. */
4940 shndx
= type_ptr
->internal_elf_sym
.st_shndx
;
4944 shndx
= elf_onesymtab (abfd
);
4947 shndx
= elf_dynsymtab (abfd
);
4950 shndx
= elf_tdata (abfd
)->strtab_section
;
4953 shndx
= elf_tdata (abfd
)->shstrtab_section
;
4956 shndx
= elf_tdata (abfd
)->symtab_shndx_section
;
4964 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec
);
4970 /* Writing this would be a hell of a lot easier if
4971 we had some decent documentation on bfd, and
4972 knew what to expect of the library, and what to
4973 demand of applications. For example, it
4974 appears that `objcopy' might not set the
4975 section of a symbol to be a section that is
4976 actually in the output file. */
4977 sec2
= bfd_get_section_by_name (abfd
, sec
->name
);
4978 BFD_ASSERT (sec2
!= 0);
4979 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec2
);
4980 BFD_ASSERT (shndx
!= -1);
4984 sym
.st_shndx
= shndx
;
4987 if ((flags
& BSF_FUNCTION
) != 0)
4989 else if ((flags
& BSF_OBJECT
) != 0)
4994 /* Processor-specific types */
4995 if (type_ptr
!= NULL
4996 && bed
->elf_backend_get_symbol_type
)
4997 type
= ((*bed
->elf_backend_get_symbol_type
)
4998 (&type_ptr
->internal_elf_sym
, type
));
5000 if (flags
& BSF_SECTION_SYM
)
5002 if (flags
& BSF_GLOBAL
)
5003 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, STT_SECTION
);
5005 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_SECTION
);
5007 else if (bfd_is_com_section (syms
[idx
]->section
))
5008 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, type
);
5009 else if (bfd_is_und_section (syms
[idx
]->section
))
5010 sym
.st_info
= ELF_ST_INFO (((flags
& BSF_WEAK
)
5014 else if (flags
& BSF_FILE
)
5015 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FILE
);
5018 int bind
= STB_LOCAL
;
5020 if (flags
& BSF_LOCAL
)
5022 else if (flags
& BSF_WEAK
)
5024 else if (flags
& BSF_GLOBAL
)
5027 sym
.st_info
= ELF_ST_INFO (bind
, type
);
5030 if (type_ptr
!= NULL
)
5031 sym
.st_other
= type_ptr
->internal_elf_sym
.st_other
;
5035 bed
->s
->swap_symbol_out (abfd
, &sym
, outbound_syms
, outbound_shndx
);
5036 outbound_syms
+= bed
->s
->sizeof_sym
;
5037 if (outbound_shndx
!= NULL
)
5038 outbound_shndx
+= sizeof (Elf_External_Sym_Shndx
);
5042 symstrtab_hdr
->sh_size
= _bfd_stringtab_size (stt
);
5043 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
5045 symstrtab_hdr
->sh_flags
= 0;
5046 symstrtab_hdr
->sh_addr
= 0;
5047 symstrtab_hdr
->sh_entsize
= 0;
5048 symstrtab_hdr
->sh_link
= 0;
5049 symstrtab_hdr
->sh_info
= 0;
5050 symstrtab_hdr
->sh_addralign
= 1;
5055 /* Return the number of bytes required to hold the symtab vector.
5057 Note that we base it on the count plus 1, since we will null terminate
5058 the vector allocated based on this size. However, the ELF symbol table
5059 always has a dummy entry as symbol #0, so it ends up even. */
5062 _bfd_elf_get_symtab_upper_bound (abfd
)
5067 Elf_Internal_Shdr
*hdr
= &elf_tdata (abfd
)->symtab_hdr
;
5069 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
5070 symtab_size
= (symcount
- 1 + 1) * (sizeof (asymbol
*));
5076 _bfd_elf_get_dynamic_symtab_upper_bound (abfd
)
5081 Elf_Internal_Shdr
*hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
5083 if (elf_dynsymtab (abfd
) == 0)
5085 bfd_set_error (bfd_error_invalid_operation
);
5089 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
5090 symtab_size
= (symcount
- 1 + 1) * (sizeof (asymbol
*));
5096 _bfd_elf_get_reloc_upper_bound (abfd
, asect
)
5097 bfd
*abfd ATTRIBUTE_UNUSED
;
5100 return (asect
->reloc_count
+ 1) * sizeof (arelent
*);
5103 /* Canonicalize the relocs. */
5106 _bfd_elf_canonicalize_reloc (abfd
, section
, relptr
, symbols
)
5114 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
5116 if (! bed
->s
->slurp_reloc_table (abfd
, section
, symbols
, false))
5119 tblptr
= section
->relocation
;
5120 for (i
= 0; i
< section
->reloc_count
; i
++)
5121 *relptr
++ = tblptr
++;
5125 return section
->reloc_count
;
5129 _bfd_elf_get_symtab (abfd
, alocation
)
5131 asymbol
**alocation
;
5133 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
5134 long symcount
= bed
->s
->slurp_symbol_table (abfd
, alocation
, false);
5137 bfd_get_symcount (abfd
) = symcount
;
5142 _bfd_elf_canonicalize_dynamic_symtab (abfd
, alocation
)
5144 asymbol
**alocation
;
5146 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
5147 return bed
->s
->slurp_symbol_table (abfd
, alocation
, true);
5150 /* Return the size required for the dynamic reloc entries. Any
5151 section that was actually installed in the BFD, and has type
5152 SHT_REL or SHT_RELA, and uses the dynamic symbol table, is
5153 considered to be a dynamic reloc section. */
5156 _bfd_elf_get_dynamic_reloc_upper_bound (abfd
)
5162 if (elf_dynsymtab (abfd
) == 0)
5164 bfd_set_error (bfd_error_invalid_operation
);
5168 ret
= sizeof (arelent
*);
5169 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
5170 if (elf_section_data (s
)->this_hdr
.sh_link
== elf_dynsymtab (abfd
)
5171 && (elf_section_data (s
)->this_hdr
.sh_type
== SHT_REL
5172 || elf_section_data (s
)->this_hdr
.sh_type
== SHT_RELA
))
5173 ret
+= ((s
->_raw_size
/ elf_section_data (s
)->this_hdr
.sh_entsize
)
5174 * sizeof (arelent
*));
5179 /* Canonicalize the dynamic relocation entries. Note that we return
5180 the dynamic relocations as a single block, although they are
5181 actually associated with particular sections; the interface, which
5182 was designed for SunOS style shared libraries, expects that there
5183 is only one set of dynamic relocs. Any section that was actually
5184 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses
5185 the dynamic symbol table, is considered to be a dynamic reloc
5189 _bfd_elf_canonicalize_dynamic_reloc (abfd
, storage
, syms
)
5194 boolean (*slurp_relocs
) PARAMS ((bfd
*, asection
*, asymbol
**, boolean
));
5198 if (elf_dynsymtab (abfd
) == 0)
5200 bfd_set_error (bfd_error_invalid_operation
);
5204 slurp_relocs
= get_elf_backend_data (abfd
)->s
->slurp_reloc_table
;
5206 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
5208 if (elf_section_data (s
)->this_hdr
.sh_link
== elf_dynsymtab (abfd
)
5209 && (elf_section_data (s
)->this_hdr
.sh_type
== SHT_REL
5210 || elf_section_data (s
)->this_hdr
.sh_type
== SHT_RELA
))
5215 if (! (*slurp_relocs
) (abfd
, s
, syms
, true))
5217 count
= s
->_raw_size
/ elf_section_data (s
)->this_hdr
.sh_entsize
;
5219 for (i
= 0; i
< count
; i
++)
5230 /* Read in the version information. */
5233 _bfd_elf_slurp_version_tables (abfd
)
5236 bfd_byte
*contents
= NULL
;
5239 if (elf_dynverdef (abfd
) != 0)
5241 Elf_Internal_Shdr
*hdr
;
5242 Elf_External_Verdef
*everdef
;
5243 Elf_Internal_Verdef
*iverdef
;
5244 Elf_Internal_Verdef
*iverdefarr
;
5245 Elf_Internal_Verdef iverdefmem
;
5247 unsigned int maxidx
;
5249 hdr
= &elf_tdata (abfd
)->dynverdef_hdr
;
5251 contents
= (bfd_byte
*) bfd_malloc (hdr
->sh_size
);
5252 if (contents
== NULL
)
5254 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
5255 || bfd_bread ((PTR
) contents
, hdr
->sh_size
, abfd
) != hdr
->sh_size
)
5258 /* We know the number of entries in the section but not the maximum
5259 index. Therefore we have to run through all entries and find
5261 everdef
= (Elf_External_Verdef
*) contents
;
5263 for (i
= 0; i
< hdr
->sh_info
; ++i
)
5265 _bfd_elf_swap_verdef_in (abfd
, everdef
, &iverdefmem
);
5267 if ((iverdefmem
.vd_ndx
& ((unsigned) VERSYM_VERSION
)) > maxidx
)
5268 maxidx
= iverdefmem
.vd_ndx
& ((unsigned) VERSYM_VERSION
);
5270 everdef
= ((Elf_External_Verdef
*)
5271 ((bfd_byte
*) everdef
+ iverdefmem
.vd_next
));
5274 amt
= (bfd_size_type
) maxidx
* sizeof (Elf_Internal_Verdef
);
5275 elf_tdata (abfd
)->verdef
= (Elf_Internal_Verdef
*) bfd_zalloc (abfd
, amt
);
5276 if (elf_tdata (abfd
)->verdef
== NULL
)
5279 elf_tdata (abfd
)->cverdefs
= maxidx
;
5281 everdef
= (Elf_External_Verdef
*) contents
;
5282 iverdefarr
= elf_tdata (abfd
)->verdef
;
5283 for (i
= 0; i
< hdr
->sh_info
; i
++)
5285 Elf_External_Verdaux
*everdaux
;
5286 Elf_Internal_Verdaux
*iverdaux
;
5289 _bfd_elf_swap_verdef_in (abfd
, everdef
, &iverdefmem
);
5291 iverdef
= &iverdefarr
[(iverdefmem
.vd_ndx
& VERSYM_VERSION
) - 1];
5292 memcpy (iverdef
, &iverdefmem
, sizeof (Elf_Internal_Verdef
));
5294 iverdef
->vd_bfd
= abfd
;
5296 amt
= (bfd_size_type
) iverdef
->vd_cnt
* sizeof (Elf_Internal_Verdaux
);
5297 iverdef
->vd_auxptr
= (Elf_Internal_Verdaux
*) bfd_alloc (abfd
, amt
);
5298 if (iverdef
->vd_auxptr
== NULL
)
5301 everdaux
= ((Elf_External_Verdaux
*)
5302 ((bfd_byte
*) everdef
+ iverdef
->vd_aux
));
5303 iverdaux
= iverdef
->vd_auxptr
;
5304 for (j
= 0; j
< iverdef
->vd_cnt
; j
++, iverdaux
++)
5306 _bfd_elf_swap_verdaux_in (abfd
, everdaux
, iverdaux
);
5308 iverdaux
->vda_nodename
=
5309 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
5310 iverdaux
->vda_name
);
5311 if (iverdaux
->vda_nodename
== NULL
)
5314 if (j
+ 1 < iverdef
->vd_cnt
)
5315 iverdaux
->vda_nextptr
= iverdaux
+ 1;
5317 iverdaux
->vda_nextptr
= NULL
;
5319 everdaux
= ((Elf_External_Verdaux
*)
5320 ((bfd_byte
*) everdaux
+ iverdaux
->vda_next
));
5323 iverdef
->vd_nodename
= iverdef
->vd_auxptr
->vda_nodename
;
5325 if (i
+ 1 < hdr
->sh_info
)
5326 iverdef
->vd_nextdef
= iverdef
+ 1;
5328 iverdef
->vd_nextdef
= NULL
;
5330 everdef
= ((Elf_External_Verdef
*)
5331 ((bfd_byte
*) everdef
+ iverdef
->vd_next
));
5338 if (elf_dynverref (abfd
) != 0)
5340 Elf_Internal_Shdr
*hdr
;
5341 Elf_External_Verneed
*everneed
;
5342 Elf_Internal_Verneed
*iverneed
;
5345 hdr
= &elf_tdata (abfd
)->dynverref_hdr
;
5347 amt
= (bfd_size_type
) hdr
->sh_info
* sizeof (Elf_Internal_Verneed
);
5348 elf_tdata (abfd
)->verref
=
5349 (Elf_Internal_Verneed
*) bfd_zalloc (abfd
, amt
);
5350 if (elf_tdata (abfd
)->verref
== NULL
)
5353 elf_tdata (abfd
)->cverrefs
= hdr
->sh_info
;
5355 contents
= (bfd_byte
*) bfd_malloc (hdr
->sh_size
);
5356 if (contents
== NULL
)
5358 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
5359 || bfd_bread ((PTR
) contents
, hdr
->sh_size
, abfd
) != hdr
->sh_size
)
5362 everneed
= (Elf_External_Verneed
*) contents
;
5363 iverneed
= elf_tdata (abfd
)->verref
;
5364 for (i
= 0; i
< hdr
->sh_info
; i
++, iverneed
++)
5366 Elf_External_Vernaux
*evernaux
;
5367 Elf_Internal_Vernaux
*ivernaux
;
5370 _bfd_elf_swap_verneed_in (abfd
, everneed
, iverneed
);
5372 iverneed
->vn_bfd
= abfd
;
5374 iverneed
->vn_filename
=
5375 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
5377 if (iverneed
->vn_filename
== NULL
)
5380 amt
= iverneed
->vn_cnt
;
5381 amt
*= sizeof (Elf_Internal_Vernaux
);
5382 iverneed
->vn_auxptr
= (Elf_Internal_Vernaux
*) bfd_alloc (abfd
, amt
);
5384 evernaux
= ((Elf_External_Vernaux
*)
5385 ((bfd_byte
*) everneed
+ iverneed
->vn_aux
));
5386 ivernaux
= iverneed
->vn_auxptr
;
5387 for (j
= 0; j
< iverneed
->vn_cnt
; j
++, ivernaux
++)
5389 _bfd_elf_swap_vernaux_in (abfd
, evernaux
, ivernaux
);
5391 ivernaux
->vna_nodename
=
5392 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
5393 ivernaux
->vna_name
);
5394 if (ivernaux
->vna_nodename
== NULL
)
5397 if (j
+ 1 < iverneed
->vn_cnt
)
5398 ivernaux
->vna_nextptr
= ivernaux
+ 1;
5400 ivernaux
->vna_nextptr
= NULL
;
5402 evernaux
= ((Elf_External_Vernaux
*)
5403 ((bfd_byte
*) evernaux
+ ivernaux
->vna_next
));
5406 if (i
+ 1 < hdr
->sh_info
)
5407 iverneed
->vn_nextref
= iverneed
+ 1;
5409 iverneed
->vn_nextref
= NULL
;
5411 everneed
= ((Elf_External_Verneed
*)
5412 ((bfd_byte
*) everneed
+ iverneed
->vn_next
));
5422 if (contents
== NULL
)
5428 _bfd_elf_make_empty_symbol (abfd
)
5431 elf_symbol_type
*newsym
;
5432 bfd_size_type amt
= sizeof (elf_symbol_type
);
5434 newsym
= (elf_symbol_type
*) bfd_zalloc (abfd
, amt
);
5439 newsym
->symbol
.the_bfd
= abfd
;
5440 return &newsym
->symbol
;
5445 _bfd_elf_get_symbol_info (ignore_abfd
, symbol
, ret
)
5446 bfd
*ignore_abfd ATTRIBUTE_UNUSED
;
5450 bfd_symbol_info (symbol
, ret
);
5453 /* Return whether a symbol name implies a local symbol. Most targets
5454 use this function for the is_local_label_name entry point, but some
5458 _bfd_elf_is_local_label_name (abfd
, name
)
5459 bfd
*abfd ATTRIBUTE_UNUSED
;
5462 /* Normal local symbols start with ``.L''. */
5463 if (name
[0] == '.' && name
[1] == 'L')
5466 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
5467 DWARF debugging symbols starting with ``..''. */
5468 if (name
[0] == '.' && name
[1] == '.')
5471 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
5472 emitting DWARF debugging output. I suspect this is actually a
5473 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
5474 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
5475 underscore to be emitted on some ELF targets). For ease of use,
5476 we treat such symbols as local. */
5477 if (name
[0] == '_' && name
[1] == '.' && name
[2] == 'L' && name
[3] == '_')
5484 _bfd_elf_get_lineno (ignore_abfd
, symbol
)
5485 bfd
*ignore_abfd ATTRIBUTE_UNUSED
;
5486 asymbol
*symbol ATTRIBUTE_UNUSED
;
5493 _bfd_elf_set_arch_mach (abfd
, arch
, machine
)
5495 enum bfd_architecture arch
;
5496 unsigned long machine
;
5498 /* If this isn't the right architecture for this backend, and this
5499 isn't the generic backend, fail. */
5500 if (arch
!= get_elf_backend_data (abfd
)->arch
5501 && arch
!= bfd_arch_unknown
5502 && get_elf_backend_data (abfd
)->arch
!= bfd_arch_unknown
)
5505 return bfd_default_set_arch_mach (abfd
, arch
, machine
);
5508 /* Find the function to a particular section and offset,
5509 for error reporting. */
5512 elf_find_function (abfd
, section
, symbols
, offset
,
5513 filename_ptr
, functionname_ptr
)
5514 bfd
*abfd ATTRIBUTE_UNUSED
;
5518 const char **filename_ptr
;
5519 const char **functionname_ptr
;
5521 const char *filename
;
5530 for (p
= symbols
; *p
!= NULL
; p
++)
5534 q
= (elf_symbol_type
*) *p
;
5536 if (bfd_get_section (&q
->symbol
) != section
)
5539 switch (ELF_ST_TYPE (q
->internal_elf_sym
.st_info
))
5544 filename
= bfd_asymbol_name (&q
->symbol
);
5548 if (q
->symbol
.section
== section
5549 && q
->symbol
.value
>= low_func
5550 && q
->symbol
.value
<= offset
)
5552 func
= (asymbol
*) q
;
5553 low_func
= q
->symbol
.value
;
5563 *filename_ptr
= filename
;
5564 if (functionname_ptr
)
5565 *functionname_ptr
= bfd_asymbol_name (func
);
5570 /* Find the nearest line to a particular section and offset,
5571 for error reporting. */
5574 _bfd_elf_find_nearest_line (abfd
, section
, symbols
, offset
,
5575 filename_ptr
, functionname_ptr
, line_ptr
)
5580 const char **filename_ptr
;
5581 const char **functionname_ptr
;
5582 unsigned int *line_ptr
;
5586 if (_bfd_dwarf1_find_nearest_line (abfd
, section
, symbols
, offset
,
5587 filename_ptr
, functionname_ptr
,
5590 if (!*functionname_ptr
)
5591 elf_find_function (abfd
, section
, symbols
, offset
,
5592 *filename_ptr
? NULL
: filename_ptr
,
5598 if (_bfd_dwarf2_find_nearest_line (abfd
, section
, symbols
, offset
,
5599 filename_ptr
, functionname_ptr
,
5601 &elf_tdata (abfd
)->dwarf2_find_line_info
))
5603 if (!*functionname_ptr
)
5604 elf_find_function (abfd
, section
, symbols
, offset
,
5605 *filename_ptr
? NULL
: filename_ptr
,
5611 if (! _bfd_stab_section_find_nearest_line (abfd
, symbols
, section
, offset
,
5612 &found
, filename_ptr
,
5613 functionname_ptr
, line_ptr
,
5614 &elf_tdata (abfd
)->line_info
))
5619 if (symbols
== NULL
)
5622 if (! elf_find_function (abfd
, section
, symbols
, offset
,
5623 filename_ptr
, functionname_ptr
))
5631 _bfd_elf_sizeof_headers (abfd
, reloc
)
5637 ret
= get_elf_backend_data (abfd
)->s
->sizeof_ehdr
;
5639 ret
+= get_program_header_size (abfd
);
5644 _bfd_elf_set_section_contents (abfd
, section
, location
, offset
, count
)
5649 bfd_size_type count
;
5651 Elf_Internal_Shdr
*hdr
;
5654 if (! abfd
->output_has_begun
5655 && ! _bfd_elf_compute_section_file_positions
5656 (abfd
, (struct bfd_link_info
*) NULL
))
5659 hdr
= &elf_section_data (section
)->this_hdr
;
5660 pos
= hdr
->sh_offset
+ offset
;
5661 if (bfd_seek (abfd
, pos
, SEEK_SET
) != 0
5662 || bfd_bwrite (location
, count
, abfd
) != count
)
5669 _bfd_elf_no_info_to_howto (abfd
, cache_ptr
, dst
)
5670 bfd
*abfd ATTRIBUTE_UNUSED
;
5671 arelent
*cache_ptr ATTRIBUTE_UNUSED
;
5672 Elf_Internal_Rela
*dst ATTRIBUTE_UNUSED
;
5679 _bfd_elf_no_info_to_howto_rel (abfd
, cache_ptr
, dst
)
5682 Elf_Internal_Rel
*dst
;
5688 /* Try to convert a non-ELF reloc into an ELF one. */
5691 _bfd_elf_validate_reloc (abfd
, areloc
)
5695 /* Check whether we really have an ELF howto. */
5697 if ((*areloc
->sym_ptr_ptr
)->the_bfd
->xvec
!= abfd
->xvec
)
5699 bfd_reloc_code_real_type code
;
5700 reloc_howto_type
*howto
;
5702 /* Alien reloc: Try to determine its type to replace it with an
5703 equivalent ELF reloc. */
5705 if (areloc
->howto
->pc_relative
)
5707 switch (areloc
->howto
->bitsize
)
5710 code
= BFD_RELOC_8_PCREL
;
5713 code
= BFD_RELOC_12_PCREL
;
5716 code
= BFD_RELOC_16_PCREL
;
5719 code
= BFD_RELOC_24_PCREL
;
5722 code
= BFD_RELOC_32_PCREL
;
5725 code
= BFD_RELOC_64_PCREL
;
5731 howto
= bfd_reloc_type_lookup (abfd
, code
);
5733 if (areloc
->howto
->pcrel_offset
!= howto
->pcrel_offset
)
5735 if (howto
->pcrel_offset
)
5736 areloc
->addend
+= areloc
->address
;
5738 areloc
->addend
-= areloc
->address
; /* addend is unsigned!! */
5743 switch (areloc
->howto
->bitsize
)
5749 code
= BFD_RELOC_14
;
5752 code
= BFD_RELOC_16
;
5755 code
= BFD_RELOC_26
;
5758 code
= BFD_RELOC_32
;
5761 code
= BFD_RELOC_64
;
5767 howto
= bfd_reloc_type_lookup (abfd
, code
);
5771 areloc
->howto
= howto
;
5779 (*_bfd_error_handler
)
5780 (_("%s: unsupported relocation type %s"),
5781 bfd_archive_filename (abfd
), areloc
->howto
->name
);
5782 bfd_set_error (bfd_error_bad_value
);
5787 _bfd_elf_close_and_cleanup (abfd
)
5790 if (bfd_get_format (abfd
) == bfd_object
)
5792 if (elf_shstrtab (abfd
) != NULL
)
5793 _bfd_elf_strtab_free (elf_shstrtab (abfd
));
5796 return _bfd_generic_close_and_cleanup (abfd
);
5799 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
5800 in the relocation's offset. Thus we cannot allow any sort of sanity
5801 range-checking to interfere. There is nothing else to do in processing
5804 bfd_reloc_status_type
5805 _bfd_elf_rel_vtable_reloc_fn (abfd
, re
, symbol
, data
, is
, obfd
, errmsg
)
5806 bfd
*abfd ATTRIBUTE_UNUSED
;
5807 arelent
*re ATTRIBUTE_UNUSED
;
5808 struct symbol_cache_entry
*symbol ATTRIBUTE_UNUSED
;
5809 PTR data ATTRIBUTE_UNUSED
;
5810 asection
*is ATTRIBUTE_UNUSED
;
5811 bfd
*obfd ATTRIBUTE_UNUSED
;
5812 char **errmsg ATTRIBUTE_UNUSED
;
5814 return bfd_reloc_ok
;
5817 /* Elf core file support. Much of this only works on native
5818 toolchains, since we rely on knowing the
5819 machine-dependent procfs structure in order to pick
5820 out details about the corefile. */
5822 #ifdef HAVE_SYS_PROCFS_H
5823 # include <sys/procfs.h>
5826 /* FIXME: this is kinda wrong, but it's what gdb wants. */
5829 elfcore_make_pid (abfd
)
5832 return ((elf_tdata (abfd
)->core_lwpid
<< 16)
5833 + (elf_tdata (abfd
)->core_pid
));
5836 /* If there isn't a section called NAME, make one, using
5837 data from SECT. Note, this function will generate a
5838 reference to NAME, so you shouldn't deallocate or
5842 elfcore_maybe_make_sect (abfd
, name
, sect
)
5849 if (bfd_get_section_by_name (abfd
, name
) != NULL
)
5852 sect2
= bfd_make_section (abfd
, name
);
5856 sect2
->_raw_size
= sect
->_raw_size
;
5857 sect2
->filepos
= sect
->filepos
;
5858 sect2
->flags
= sect
->flags
;
5859 sect2
->alignment_power
= sect
->alignment_power
;
5863 /* Create a pseudosection containing SIZE bytes at FILEPOS. This
5864 actually creates up to two pseudosections:
5865 - For the single-threaded case, a section named NAME, unless
5866 such a section already exists.
5867 - For the multi-threaded case, a section named "NAME/PID", where
5868 PID is elfcore_make_pid (abfd).
5869 Both pseudosections have identical contents. */
5871 _bfd_elfcore_make_pseudosection (abfd
, name
, size
, filepos
)
5878 char *threaded_name
;
5881 /* Build the section name. */
5883 sprintf (buf
, "%s/%d", name
, elfcore_make_pid (abfd
));
5884 threaded_name
= bfd_alloc (abfd
, (bfd_size_type
) strlen (buf
) + 1);
5885 if (threaded_name
== NULL
)
5887 strcpy (threaded_name
, buf
);
5889 sect
= bfd_make_section (abfd
, threaded_name
);
5892 sect
->_raw_size
= size
;
5893 sect
->filepos
= filepos
;
5894 sect
->flags
= SEC_HAS_CONTENTS
;
5895 sect
->alignment_power
= 2;
5897 return elfcore_maybe_make_sect (abfd
, name
, sect
);
5900 /* prstatus_t exists on:
5902 linux 2.[01] + glibc
5906 #if defined (HAVE_PRSTATUS_T)
5907 static boolean elfcore_grok_prstatus
PARAMS ((bfd
*, Elf_Internal_Note
*));
5910 elfcore_grok_prstatus (abfd
, note
)
5912 Elf_Internal_Note
*note
;
5917 if (note
->descsz
== sizeof (prstatus_t
))
5921 raw_size
= sizeof (prstat
.pr_reg
);
5922 offset
= offsetof (prstatus_t
, pr_reg
);
5923 memcpy (&prstat
, note
->descdata
, sizeof (prstat
));
5925 /* Do not overwrite the core signal if it
5926 has already been set by another thread. */
5927 if (elf_tdata (abfd
)->core_signal
== 0)
5928 elf_tdata (abfd
)->core_signal
= prstat
.pr_cursig
;
5929 elf_tdata (abfd
)->core_pid
= prstat
.pr_pid
;
5931 /* pr_who exists on:
5934 pr_who doesn't exist on:
5937 #if defined (HAVE_PRSTATUS_T_PR_WHO)
5938 elf_tdata (abfd
)->core_lwpid
= prstat
.pr_who
;
5941 #if defined (HAVE_PRSTATUS32_T)
5942 else if (note
->descsz
== sizeof (prstatus32_t
))
5944 /* 64-bit host, 32-bit corefile */
5945 prstatus32_t prstat
;
5947 raw_size
= sizeof (prstat
.pr_reg
);
5948 offset
= offsetof (prstatus32_t
, pr_reg
);
5949 memcpy (&prstat
, note
->descdata
, sizeof (prstat
));
5951 /* Do not overwrite the core signal if it
5952 has already been set by another thread. */
5953 if (elf_tdata (abfd
)->core_signal
== 0)
5954 elf_tdata (abfd
)->core_signal
= prstat
.pr_cursig
;
5955 elf_tdata (abfd
)->core_pid
= prstat
.pr_pid
;
5957 /* pr_who exists on:
5960 pr_who doesn't exist on:
5963 #if defined (HAVE_PRSTATUS32_T_PR_WHO)
5964 elf_tdata (abfd
)->core_lwpid
= prstat
.pr_who
;
5967 #endif /* HAVE_PRSTATUS32_T */
5970 /* Fail - we don't know how to handle any other
5971 note size (ie. data object type). */
5975 /* Make a ".reg/999" section and a ".reg" section. */
5976 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
5977 raw_size
, note
->descpos
+ offset
);
5979 #endif /* defined (HAVE_PRSTATUS_T) */
5981 /* Create a pseudosection containing the exact contents of NOTE. */
5983 elfcore_make_note_pseudosection (abfd
, name
, note
)
5986 Elf_Internal_Note
*note
;
5988 return _bfd_elfcore_make_pseudosection (abfd
, name
,
5989 note
->descsz
, note
->descpos
);
5992 /* There isn't a consistent prfpregset_t across platforms,
5993 but it doesn't matter, because we don't have to pick this
5994 data structure apart. */
5997 elfcore_grok_prfpreg (abfd
, note
)
5999 Elf_Internal_Note
*note
;
6001 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
6004 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
6005 type of 5 (NT_PRXFPREG). Just include the whole note's contents
6009 elfcore_grok_prxfpreg (abfd
, note
)
6011 Elf_Internal_Note
*note
;
6013 return elfcore_make_note_pseudosection (abfd
, ".reg-xfp", note
);
6016 #if defined (HAVE_PRPSINFO_T)
6017 typedef prpsinfo_t elfcore_psinfo_t
;
6018 #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
6019 typedef prpsinfo32_t elfcore_psinfo32_t
;
6023 #if defined (HAVE_PSINFO_T)
6024 typedef psinfo_t elfcore_psinfo_t
;
6025 #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
6026 typedef psinfo32_t elfcore_psinfo32_t
;
6030 /* return a malloc'ed copy of a string at START which is at
6031 most MAX bytes long, possibly without a terminating '\0'.
6032 the copy will always have a terminating '\0'. */
6035 _bfd_elfcore_strndup (abfd
, start
, max
)
6041 char *end
= memchr (start
, '\0', max
);
6049 dups
= bfd_alloc (abfd
, (bfd_size_type
) len
+ 1);
6053 memcpy (dups
, start
, len
);
6059 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
6060 static boolean elfcore_grok_psinfo
PARAMS ((bfd
*, Elf_Internal_Note
*));
6063 elfcore_grok_psinfo (abfd
, note
)
6065 Elf_Internal_Note
*note
;
6067 if (note
->descsz
== sizeof (elfcore_psinfo_t
))
6069 elfcore_psinfo_t psinfo
;
6071 memcpy (&psinfo
, note
->descdata
, sizeof (psinfo
));
6073 elf_tdata (abfd
)->core_program
6074 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_fname
,
6075 sizeof (psinfo
.pr_fname
));
6077 elf_tdata (abfd
)->core_command
6078 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_psargs
,
6079 sizeof (psinfo
.pr_psargs
));
6081 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
6082 else if (note
->descsz
== sizeof (elfcore_psinfo32_t
))
6084 /* 64-bit host, 32-bit corefile */
6085 elfcore_psinfo32_t psinfo
;
6087 memcpy (&psinfo
, note
->descdata
, sizeof (psinfo
));
6089 elf_tdata (abfd
)->core_program
6090 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_fname
,
6091 sizeof (psinfo
.pr_fname
));
6093 elf_tdata (abfd
)->core_command
6094 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_psargs
,
6095 sizeof (psinfo
.pr_psargs
));
6101 /* Fail - we don't know how to handle any other
6102 note size (ie. data object type). */
6106 /* Note that for some reason, a spurious space is tacked
6107 onto the end of the args in some (at least one anyway)
6108 implementations, so strip it off if it exists. */
6111 char *command
= elf_tdata (abfd
)->core_command
;
6112 int n
= strlen (command
);
6114 if (0 < n
&& command
[n
- 1] == ' ')
6115 command
[n
- 1] = '\0';
6120 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
6122 #if defined (HAVE_PSTATUS_T)
6124 elfcore_grok_pstatus (abfd
, note
)
6126 Elf_Internal_Note
*note
;
6128 if (note
->descsz
== sizeof (pstatus_t
)
6129 #if defined (HAVE_PXSTATUS_T)
6130 || note
->descsz
== sizeof (pxstatus_t
)
6136 memcpy (&pstat
, note
->descdata
, sizeof (pstat
));
6138 elf_tdata (abfd
)->core_pid
= pstat
.pr_pid
;
6140 #if defined (HAVE_PSTATUS32_T)
6141 else if (note
->descsz
== sizeof (pstatus32_t
))
6143 /* 64-bit host, 32-bit corefile */
6146 memcpy (&pstat
, note
->descdata
, sizeof (pstat
));
6148 elf_tdata (abfd
)->core_pid
= pstat
.pr_pid
;
6151 /* Could grab some more details from the "representative"
6152 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
6153 NT_LWPSTATUS note, presumably. */
6157 #endif /* defined (HAVE_PSTATUS_T) */
6159 #if defined (HAVE_LWPSTATUS_T)
6161 elfcore_grok_lwpstatus (abfd
, note
)
6163 Elf_Internal_Note
*note
;
6165 lwpstatus_t lwpstat
;
6170 if (note
->descsz
!= sizeof (lwpstat
)
6171 #if defined (HAVE_LWPXSTATUS_T)
6172 && note
->descsz
!= sizeof (lwpxstatus_t
)
6177 memcpy (&lwpstat
, note
->descdata
, sizeof (lwpstat
));
6179 elf_tdata (abfd
)->core_lwpid
= lwpstat
.pr_lwpid
;
6180 elf_tdata (abfd
)->core_signal
= lwpstat
.pr_cursig
;
6182 /* Make a ".reg/999" section. */
6184 sprintf (buf
, ".reg/%d", elfcore_make_pid (abfd
));
6185 name
= bfd_alloc (abfd
, (bfd_size_type
) strlen (buf
) + 1);
6190 sect
= bfd_make_section (abfd
, name
);
6194 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
6195 sect
->_raw_size
= sizeof (lwpstat
.pr_context
.uc_mcontext
.gregs
);
6196 sect
->filepos
= note
->descpos
6197 + offsetof (lwpstatus_t
, pr_context
.uc_mcontext
.gregs
);
6200 #if defined (HAVE_LWPSTATUS_T_PR_REG)
6201 sect
->_raw_size
= sizeof (lwpstat
.pr_reg
);
6202 sect
->filepos
= note
->descpos
+ offsetof (lwpstatus_t
, pr_reg
);
6205 sect
->flags
= SEC_HAS_CONTENTS
;
6206 sect
->alignment_power
= 2;
6208 if (!elfcore_maybe_make_sect (abfd
, ".reg", sect
))
6211 /* Make a ".reg2/999" section */
6213 sprintf (buf
, ".reg2/%d", elfcore_make_pid (abfd
));
6214 name
= bfd_alloc (abfd
, (bfd_size_type
) strlen (buf
) + 1);
6219 sect
= bfd_make_section (abfd
, name
);
6223 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
6224 sect
->_raw_size
= sizeof (lwpstat
.pr_context
.uc_mcontext
.fpregs
);
6225 sect
->filepos
= note
->descpos
6226 + offsetof (lwpstatus_t
, pr_context
.uc_mcontext
.fpregs
);
6229 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
6230 sect
->_raw_size
= sizeof (lwpstat
.pr_fpreg
);
6231 sect
->filepos
= note
->descpos
+ offsetof (lwpstatus_t
, pr_fpreg
);
6234 sect
->flags
= SEC_HAS_CONTENTS
;
6235 sect
->alignment_power
= 2;
6237 return elfcore_maybe_make_sect (abfd
, ".reg2", sect
);
6239 #endif /* defined (HAVE_LWPSTATUS_T) */
6241 #if defined (HAVE_WIN32_PSTATUS_T)
6243 elfcore_grok_win32pstatus (abfd
, note
)
6245 Elf_Internal_Note
*note
;
6250 win32_pstatus_t pstatus
;
6252 if (note
->descsz
< sizeof (pstatus
))
6255 memcpy (&pstatus
, note
->descdata
, note
->descsz
);
6257 switch (pstatus
.data_type
)
6259 case NOTE_INFO_PROCESS
:
6260 /* FIXME: need to add ->core_command. */
6261 elf_tdata (abfd
)->core_signal
= pstatus
.data
.process_info
.signal
;
6262 elf_tdata (abfd
)->core_pid
= pstatus
.data
.process_info
.pid
;
6265 case NOTE_INFO_THREAD
:
6266 /* Make a ".reg/999" section. */
6267 sprintf (buf
, ".reg/%d", pstatus
.data
.thread_info
.tid
);
6269 name
= bfd_alloc (abfd
, (bfd_size_type
) strlen (buf
) + 1);
6275 sect
= bfd_make_section (abfd
, name
);
6279 sect
->_raw_size
= sizeof (pstatus
.data
.thread_info
.thread_context
);
6280 sect
->filepos
= (note
->descpos
6281 + offsetof (struct win32_pstatus
,
6282 data
.thread_info
.thread_context
));
6283 sect
->flags
= SEC_HAS_CONTENTS
;
6284 sect
->alignment_power
= 2;
6286 if (pstatus
.data
.thread_info
.is_active_thread
)
6287 if (! elfcore_maybe_make_sect (abfd
, ".reg", sect
))
6291 case NOTE_INFO_MODULE
:
6292 /* Make a ".module/xxxxxxxx" section. */
6293 sprintf (buf
, ".module/%08x", pstatus
.data
.module_info
.base_address
);
6295 name
= bfd_alloc (abfd
, (bfd_size_type
) strlen (buf
) + 1);
6301 sect
= bfd_make_section (abfd
, name
);
6306 sect
->_raw_size
= note
->descsz
;
6307 sect
->filepos
= note
->descpos
;
6308 sect
->flags
= SEC_HAS_CONTENTS
;
6309 sect
->alignment_power
= 2;
6318 #endif /* HAVE_WIN32_PSTATUS_T */
6321 elfcore_grok_note (abfd
, note
)
6323 Elf_Internal_Note
*note
;
6325 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
6333 if (bed
->elf_backend_grok_prstatus
)
6334 if ((*bed
->elf_backend_grok_prstatus
) (abfd
, note
))
6336 #if defined (HAVE_PRSTATUS_T)
6337 return elfcore_grok_prstatus (abfd
, note
);
6342 #if defined (HAVE_PSTATUS_T)
6344 return elfcore_grok_pstatus (abfd
, note
);
6347 #if defined (HAVE_LWPSTATUS_T)
6349 return elfcore_grok_lwpstatus (abfd
, note
);
6352 case NT_FPREGSET
: /* FIXME: rename to NT_PRFPREG */
6353 return elfcore_grok_prfpreg (abfd
, note
);
6355 #if defined (HAVE_WIN32_PSTATUS_T)
6356 case NT_WIN32PSTATUS
:
6357 return elfcore_grok_win32pstatus (abfd
, note
);
6360 case NT_PRXFPREG
: /* Linux SSE extension */
6361 if (note
->namesz
== 5
6362 && ! strcmp (note
->namedata
, "LINUX"))
6363 return elfcore_grok_prxfpreg (abfd
, note
);
6369 if (bed
->elf_backend_grok_psinfo
)
6370 if ((*bed
->elf_backend_grok_psinfo
) (abfd
, note
))
6372 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
6373 return elfcore_grok_psinfo (abfd
, note
);
6381 elfcore_netbsd_get_lwpid (note
, lwpidp
)
6382 Elf_Internal_Note
*note
;
6387 cp
= strchr (note
->namedata
, '@');
6397 elfcore_grok_netbsd_procinfo (abfd
, note
)
6399 Elf_Internal_Note
*note
;
6402 /* Signal number at offset 0x08. */
6403 elf_tdata (abfd
)->core_signal
6404 = bfd_h_get_32 (abfd
, (bfd_byte
*) note
->descdata
+ 0x08);
6406 /* Process ID at offset 0x50. */
6407 elf_tdata (abfd
)->core_pid
6408 = bfd_h_get_32 (abfd
, (bfd_byte
*) note
->descdata
+ 0x50);
6410 /* Command name at 0x7c (max 32 bytes, including nul). */
6411 elf_tdata (abfd
)->core_command
6412 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 0x7c, 31);
6418 elfcore_grok_netbsd_note (abfd
, note
)
6420 Elf_Internal_Note
*note
;
6424 if (elfcore_netbsd_get_lwpid (note
, &lwp
))
6425 elf_tdata (abfd
)->core_lwpid
= lwp
;
6427 if (note
->type
== 1)
6429 /* NetBSD-specific core "procinfo". Note that we expect to
6430 find this note before any of the others, which is fine,
6431 since the kernel writes this note out first when it
6432 creates a core file. */
6434 return elfcore_grok_netbsd_procinfo (abfd
, note
);
6437 /* There are not currently any other machine-independent notes defined
6438 for NetBSD ELF core files. If the note type is less than the start
6439 of the machine-dependent note types, we don't understand it. */
6441 if (note
->type
< 32)
6445 switch (bfd_get_arch (abfd
))
6447 /* On the Alpha, SPARC (32-bit and 64-bit), PT_GETREGS == mach+0 and
6448 PT_GETFPREGS == mach+2. */
6450 case bfd_arch_alpha
:
6451 case bfd_arch_sparc
:
6455 return elfcore_make_note_pseudosection (abfd
, ".reg", note
);
6458 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
6464 /* On all other arch's, PT_GETREGS == mach+1 and
6465 PT_GETFPREGS == mach+3. */
6471 return elfcore_make_note_pseudosection (abfd
, ".reg", note
);
6474 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
6484 elfcore_read_notes (abfd
, offset
, size
)
6495 if (bfd_seek (abfd
, offset
, SEEK_SET
) != 0)
6498 buf
= bfd_malloc (size
);
6502 if (bfd_bread (buf
, size
, abfd
) != size
)
6510 while (p
< buf
+ size
)
6512 /* FIXME: bad alignment assumption. */
6513 Elf_External_Note
*xnp
= (Elf_External_Note
*) p
;
6514 Elf_Internal_Note in
;
6516 in
.type
= H_GET_32 (abfd
, xnp
->type
);
6518 in
.namesz
= H_GET_32 (abfd
, xnp
->namesz
);
6519 in
.namedata
= xnp
->name
;
6521 in
.descsz
= H_GET_32 (abfd
, xnp
->descsz
);
6522 in
.descdata
= in
.namedata
+ BFD_ALIGN (in
.namesz
, 4);
6523 in
.descpos
= offset
+ (in
.descdata
- buf
);
6525 if (strncmp (in
.namedata
, "NetBSD-CORE", 11) == 0)
6527 if (! elfcore_grok_netbsd_note (abfd
, &in
))
6532 if (! elfcore_grok_note (abfd
, &in
))
6536 p
= in
.descdata
+ BFD_ALIGN (in
.descsz
, 4);
6543 /* Providing external access to the ELF program header table. */
6545 /* Return an upper bound on the number of bytes required to store a
6546 copy of ABFD's program header table entries. Return -1 if an error
6547 occurs; bfd_get_error will return an appropriate code. */
6550 bfd_get_elf_phdr_upper_bound (abfd
)
6553 if (abfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
6555 bfd_set_error (bfd_error_wrong_format
);
6559 return elf_elfheader (abfd
)->e_phnum
* sizeof (Elf_Internal_Phdr
);
6562 /* Copy ABFD's program header table entries to *PHDRS. The entries
6563 will be stored as an array of Elf_Internal_Phdr structures, as
6564 defined in include/elf/internal.h. To find out how large the
6565 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
6567 Return the number of program header table entries read, or -1 if an
6568 error occurs; bfd_get_error will return an appropriate code. */
6571 bfd_get_elf_phdrs (abfd
, phdrs
)
6577 if (abfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
6579 bfd_set_error (bfd_error_wrong_format
);
6583 num_phdrs
= elf_elfheader (abfd
)->e_phnum
;
6584 memcpy (phdrs
, elf_tdata (abfd
)->phdr
,
6585 num_phdrs
* sizeof (Elf_Internal_Phdr
));
6591 _bfd_elf_sprintf_vma (abfd
, buf
, value
)
6592 bfd
*abfd ATTRIBUTE_UNUSED
;
6597 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
6599 i_ehdrp
= elf_elfheader (abfd
);
6600 if (i_ehdrp
== NULL
)
6601 sprintf_vma (buf
, value
);
6604 if (i_ehdrp
->e_ident
[EI_CLASS
] == ELFCLASS64
)
6606 #if BFD_HOST_64BIT_LONG
6607 sprintf (buf
, "%016lx", value
);
6609 sprintf (buf
, "%08lx%08lx", _bfd_int64_high (value
),
6610 _bfd_int64_low (value
));
6614 sprintf (buf
, "%08lx", (unsigned long) (value
& 0xffffffff));
6617 sprintf_vma (buf
, value
);
6622 _bfd_elf_fprintf_vma (abfd
, stream
, value
)
6623 bfd
*abfd ATTRIBUTE_UNUSED
;
6628 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
6630 i_ehdrp
= elf_elfheader (abfd
);
6631 if (i_ehdrp
== NULL
)
6632 fprintf_vma ((FILE *) stream
, value
);
6635 if (i_ehdrp
->e_ident
[EI_CLASS
] == ELFCLASS64
)
6637 #if BFD_HOST_64BIT_LONG
6638 fprintf ((FILE *) stream
, "%016lx", value
);
6640 fprintf ((FILE *) stream
, "%08lx%08lx",
6641 _bfd_int64_high (value
), _bfd_int64_low (value
));
6645 fprintf ((FILE *) stream
, "%08lx",
6646 (unsigned long) (value
& 0xffffffff));
6649 fprintf_vma ((FILE *) stream
, value
);
6653 enum elf_reloc_type_class
6654 _bfd_elf_reloc_type_class (rela
)
6655 const Elf_Internal_Rela
*rela ATTRIBUTE_UNUSED
;
6657 return reloc_class_normal
;
6660 /* For RELA architectures, return what the relocation value for
6661 relocation against a local symbol. */
6664 _bfd_elf_rela_local_sym (abfd
, sym
, sec
, rel
)
6666 Elf_Internal_Sym
*sym
;
6668 Elf_Internal_Rela
*rel
;
6672 relocation
= (sec
->output_section
->vma
6673 + sec
->output_offset
6675 if ((sec
->flags
& SEC_MERGE
)
6676 && ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
6677 && elf_section_data (sec
)->sec_info_type
== ELF_INFO_TYPE_MERGE
)
6683 _bfd_merged_section_offset (abfd
, &msec
,
6684 elf_section_data (sec
)->sec_info
,
6685 sym
->st_value
+ rel
->r_addend
,
6688 rel
->r_addend
+= msec
->output_section
->vma
+ msec
->output_offset
;
6694 _bfd_elf_rel_local_sym (abfd
, sym
, psec
, addend
)
6696 Elf_Internal_Sym
*sym
;
6700 asection
*sec
= *psec
;
6702 if (elf_section_data (sec
)->sec_info_type
!= ELF_INFO_TYPE_MERGE
)
6703 return sym
->st_value
+ addend
;
6705 return _bfd_merged_section_offset (abfd
, psec
,
6706 elf_section_data (sec
)->sec_info
,
6707 sym
->st_value
+ addend
, (bfd_vma
) 0);
6711 _bfd_elf_section_offset (abfd
, info
, sec
, offset
)
6713 struct bfd_link_info
*info
;
6717 struct bfd_elf_section_data
*sec_data
;
6719 sec_data
= elf_section_data (sec
);
6720 switch (sec_data
->sec_info_type
)
6722 case ELF_INFO_TYPE_STABS
:
6723 return _bfd_stab_section_offset
6724 (abfd
, &elf_hash_table (info
)->merge_info
, sec
, &sec_data
->sec_info
,
6726 case ELF_INFO_TYPE_EH_FRAME
:
6727 return _bfd_elf_eh_frame_section_offset (abfd
, sec
, offset
);