1 /* ELF executable support for BFD.
3 Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
4 2002, 2003, 2004 Free Software Foundation, Inc.
6 This file is part of BFD, the Binary File Descriptor library.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
26 BFD support for ELF formats is being worked on.
27 Currently, the best supported back ends are for sparc and i386
28 (running svr4 or Solaris 2).
30 Documentation of the internals of the support code still needs
31 to be written. The code is changing quickly enough that we
32 haven't bothered yet. */
34 /* For sparc64-cross-sparc32. */
42 #include "libiberty.h"
44 static int elf_sort_sections (const void *, const void *);
45 static bfd_boolean
assign_file_positions_except_relocs (bfd
*, struct bfd_link_info
*);
46 static bfd_boolean
prep_headers (bfd
*);
47 static bfd_boolean
swap_out_syms (bfd
*, struct bfd_strtab_hash
**, int) ;
48 static bfd_boolean
elfcore_read_notes (bfd
*, file_ptr
, bfd_size_type
) ;
50 /* Swap version information in and out. The version information is
51 currently size independent. If that ever changes, this code will
52 need to move into elfcode.h. */
54 /* Swap in a Verdef structure. */
57 _bfd_elf_swap_verdef_in (bfd
*abfd
,
58 const Elf_External_Verdef
*src
,
59 Elf_Internal_Verdef
*dst
)
61 dst
->vd_version
= H_GET_16 (abfd
, src
->vd_version
);
62 dst
->vd_flags
= H_GET_16 (abfd
, src
->vd_flags
);
63 dst
->vd_ndx
= H_GET_16 (abfd
, src
->vd_ndx
);
64 dst
->vd_cnt
= H_GET_16 (abfd
, src
->vd_cnt
);
65 dst
->vd_hash
= H_GET_32 (abfd
, src
->vd_hash
);
66 dst
->vd_aux
= H_GET_32 (abfd
, src
->vd_aux
);
67 dst
->vd_next
= H_GET_32 (abfd
, src
->vd_next
);
70 /* Swap out a Verdef structure. */
73 _bfd_elf_swap_verdef_out (bfd
*abfd
,
74 const Elf_Internal_Verdef
*src
,
75 Elf_External_Verdef
*dst
)
77 H_PUT_16 (abfd
, src
->vd_version
, dst
->vd_version
);
78 H_PUT_16 (abfd
, src
->vd_flags
, dst
->vd_flags
);
79 H_PUT_16 (abfd
, src
->vd_ndx
, dst
->vd_ndx
);
80 H_PUT_16 (abfd
, src
->vd_cnt
, dst
->vd_cnt
);
81 H_PUT_32 (abfd
, src
->vd_hash
, dst
->vd_hash
);
82 H_PUT_32 (abfd
, src
->vd_aux
, dst
->vd_aux
);
83 H_PUT_32 (abfd
, src
->vd_next
, dst
->vd_next
);
86 /* Swap in a Verdaux structure. */
89 _bfd_elf_swap_verdaux_in (bfd
*abfd
,
90 const Elf_External_Verdaux
*src
,
91 Elf_Internal_Verdaux
*dst
)
93 dst
->vda_name
= H_GET_32 (abfd
, src
->vda_name
);
94 dst
->vda_next
= H_GET_32 (abfd
, src
->vda_next
);
97 /* Swap out a Verdaux structure. */
100 _bfd_elf_swap_verdaux_out (bfd
*abfd
,
101 const Elf_Internal_Verdaux
*src
,
102 Elf_External_Verdaux
*dst
)
104 H_PUT_32 (abfd
, src
->vda_name
, dst
->vda_name
);
105 H_PUT_32 (abfd
, src
->vda_next
, dst
->vda_next
);
108 /* Swap in a Verneed structure. */
111 _bfd_elf_swap_verneed_in (bfd
*abfd
,
112 const Elf_External_Verneed
*src
,
113 Elf_Internal_Verneed
*dst
)
115 dst
->vn_version
= H_GET_16 (abfd
, src
->vn_version
);
116 dst
->vn_cnt
= H_GET_16 (abfd
, src
->vn_cnt
);
117 dst
->vn_file
= H_GET_32 (abfd
, src
->vn_file
);
118 dst
->vn_aux
= H_GET_32 (abfd
, src
->vn_aux
);
119 dst
->vn_next
= H_GET_32 (abfd
, src
->vn_next
);
122 /* Swap out a Verneed structure. */
125 _bfd_elf_swap_verneed_out (bfd
*abfd
,
126 const Elf_Internal_Verneed
*src
,
127 Elf_External_Verneed
*dst
)
129 H_PUT_16 (abfd
, src
->vn_version
, dst
->vn_version
);
130 H_PUT_16 (abfd
, src
->vn_cnt
, dst
->vn_cnt
);
131 H_PUT_32 (abfd
, src
->vn_file
, dst
->vn_file
);
132 H_PUT_32 (abfd
, src
->vn_aux
, dst
->vn_aux
);
133 H_PUT_32 (abfd
, src
->vn_next
, dst
->vn_next
);
136 /* Swap in a Vernaux structure. */
139 _bfd_elf_swap_vernaux_in (bfd
*abfd
,
140 const Elf_External_Vernaux
*src
,
141 Elf_Internal_Vernaux
*dst
)
143 dst
->vna_hash
= H_GET_32 (abfd
, src
->vna_hash
);
144 dst
->vna_flags
= H_GET_16 (abfd
, src
->vna_flags
);
145 dst
->vna_other
= H_GET_16 (abfd
, src
->vna_other
);
146 dst
->vna_name
= H_GET_32 (abfd
, src
->vna_name
);
147 dst
->vna_next
= H_GET_32 (abfd
, src
->vna_next
);
150 /* Swap out a Vernaux structure. */
153 _bfd_elf_swap_vernaux_out (bfd
*abfd
,
154 const Elf_Internal_Vernaux
*src
,
155 Elf_External_Vernaux
*dst
)
157 H_PUT_32 (abfd
, src
->vna_hash
, dst
->vna_hash
);
158 H_PUT_16 (abfd
, src
->vna_flags
, dst
->vna_flags
);
159 H_PUT_16 (abfd
, src
->vna_other
, dst
->vna_other
);
160 H_PUT_32 (abfd
, src
->vna_name
, dst
->vna_name
);
161 H_PUT_32 (abfd
, src
->vna_next
, dst
->vna_next
);
164 /* Swap in a Versym structure. */
167 _bfd_elf_swap_versym_in (bfd
*abfd
,
168 const Elf_External_Versym
*src
,
169 Elf_Internal_Versym
*dst
)
171 dst
->vs_vers
= H_GET_16 (abfd
, src
->vs_vers
);
174 /* Swap out a Versym structure. */
177 _bfd_elf_swap_versym_out (bfd
*abfd
,
178 const Elf_Internal_Versym
*src
,
179 Elf_External_Versym
*dst
)
181 H_PUT_16 (abfd
, src
->vs_vers
, dst
->vs_vers
);
184 /* Standard ELF hash function. Do not change this function; you will
185 cause invalid hash tables to be generated. */
188 bfd_elf_hash (const char *namearg
)
190 const unsigned char *name
= (const unsigned char *) namearg
;
195 while ((ch
= *name
++) != '\0')
198 if ((g
= (h
& 0xf0000000)) != 0)
201 /* The ELF ABI says `h &= ~g', but this is equivalent in
202 this case and on some machines one insn instead of two. */
206 return h
& 0xffffffff;
209 /* Read a specified number of bytes at a specified offset in an ELF
210 file, into a newly allocated buffer, and return a pointer to the
214 elf_read (bfd
*abfd
, file_ptr offset
, bfd_size_type size
)
218 if ((buf
= bfd_alloc (abfd
, size
)) == NULL
)
220 if (bfd_seek (abfd
, offset
, SEEK_SET
) != 0)
222 if (bfd_bread (buf
, size
, abfd
) != size
)
224 if (bfd_get_error () != bfd_error_system_call
)
225 bfd_set_error (bfd_error_file_truncated
);
232 bfd_elf_mkobject (bfd
*abfd
)
234 /* This just does initialization. */
235 /* coff_mkobject zalloc's space for tdata.coff_obj_data ... */
236 elf_tdata (abfd
) = bfd_zalloc (abfd
, sizeof (struct elf_obj_tdata
));
237 if (elf_tdata (abfd
) == 0)
239 /* Since everything is done at close time, do we need any
246 bfd_elf_mkcorefile (bfd
*abfd
)
248 /* I think this can be done just like an object file. */
249 return bfd_elf_mkobject (abfd
);
253 bfd_elf_get_str_section (bfd
*abfd
, unsigned int shindex
)
255 Elf_Internal_Shdr
**i_shdrp
;
256 char *shstrtab
= NULL
;
258 bfd_size_type shstrtabsize
;
260 i_shdrp
= elf_elfsections (abfd
);
261 if (i_shdrp
== 0 || i_shdrp
[shindex
] == 0)
264 shstrtab
= (char *) i_shdrp
[shindex
]->contents
;
265 if (shstrtab
== NULL
)
267 /* No cached one, attempt to read, and cache what we read. */
268 offset
= i_shdrp
[shindex
]->sh_offset
;
269 shstrtabsize
= i_shdrp
[shindex
]->sh_size
;
270 shstrtab
= elf_read (abfd
, offset
, shstrtabsize
);
271 i_shdrp
[shindex
]->contents
= shstrtab
;
277 bfd_elf_string_from_elf_section (bfd
*abfd
,
278 unsigned int shindex
,
279 unsigned int strindex
)
281 Elf_Internal_Shdr
*hdr
;
286 hdr
= elf_elfsections (abfd
)[shindex
];
288 if (hdr
->contents
== NULL
289 && bfd_elf_get_str_section (abfd
, shindex
) == NULL
)
292 if (strindex
>= hdr
->sh_size
)
294 (*_bfd_error_handler
)
295 (_("%B: invalid string offset %u >= %lu for section `%s'"),
296 abfd
, strindex
, (unsigned long) hdr
->sh_size
,
297 ((shindex
== elf_elfheader(abfd
)->e_shstrndx
298 && strindex
== hdr
->sh_name
)
300 : elf_string_from_elf_strtab (abfd
, hdr
->sh_name
)));
304 return ((char *) hdr
->contents
) + strindex
;
307 /* Read and convert symbols to internal format.
308 SYMCOUNT specifies the number of symbols to read, starting from
309 symbol SYMOFFSET. If any of INTSYM_BUF, EXTSYM_BUF or EXTSHNDX_BUF
310 are non-NULL, they are used to store the internal symbols, external
311 symbols, and symbol section index extensions, respectively. */
314 bfd_elf_get_elf_syms (bfd
*ibfd
,
315 Elf_Internal_Shdr
*symtab_hdr
,
318 Elf_Internal_Sym
*intsym_buf
,
320 Elf_External_Sym_Shndx
*extshndx_buf
)
322 Elf_Internal_Shdr
*shndx_hdr
;
324 const bfd_byte
*esym
;
325 Elf_External_Sym_Shndx
*alloc_extshndx
;
326 Elf_External_Sym_Shndx
*shndx
;
327 Elf_Internal_Sym
*isym
;
328 Elf_Internal_Sym
*isymend
;
329 const struct elf_backend_data
*bed
;
337 /* Normal syms might have section extension entries. */
339 if (symtab_hdr
== &elf_tdata (ibfd
)->symtab_hdr
)
340 shndx_hdr
= &elf_tdata (ibfd
)->symtab_shndx_hdr
;
342 /* Read the symbols. */
344 alloc_extshndx
= NULL
;
345 bed
= get_elf_backend_data (ibfd
);
346 extsym_size
= bed
->s
->sizeof_sym
;
347 amt
= symcount
* extsym_size
;
348 pos
= symtab_hdr
->sh_offset
+ symoffset
* extsym_size
;
349 if (extsym_buf
== NULL
)
351 alloc_ext
= bfd_malloc (amt
);
352 extsym_buf
= alloc_ext
;
354 if (extsym_buf
== NULL
355 || bfd_seek (ibfd
, pos
, SEEK_SET
) != 0
356 || bfd_bread (extsym_buf
, amt
, ibfd
) != amt
)
362 if (shndx_hdr
== NULL
|| shndx_hdr
->sh_size
== 0)
366 amt
= symcount
* sizeof (Elf_External_Sym_Shndx
);
367 pos
= shndx_hdr
->sh_offset
+ symoffset
* sizeof (Elf_External_Sym_Shndx
);
368 if (extshndx_buf
== NULL
)
370 alloc_extshndx
= bfd_malloc (amt
);
371 extshndx_buf
= alloc_extshndx
;
373 if (extshndx_buf
== NULL
374 || bfd_seek (ibfd
, pos
, SEEK_SET
) != 0
375 || bfd_bread (extshndx_buf
, amt
, ibfd
) != amt
)
382 if (intsym_buf
== NULL
)
384 bfd_size_type amt
= symcount
* sizeof (Elf_Internal_Sym
);
385 intsym_buf
= bfd_malloc (amt
);
386 if (intsym_buf
== NULL
)
390 /* Convert the symbols to internal form. */
391 isymend
= intsym_buf
+ symcount
;
392 for (esym
= extsym_buf
, isym
= intsym_buf
, shndx
= extshndx_buf
;
394 esym
+= extsym_size
, isym
++, shndx
= shndx
!= NULL
? shndx
+ 1 : NULL
)
395 (*bed
->s
->swap_symbol_in
) (ibfd
, esym
, shndx
, isym
);
398 if (alloc_ext
!= NULL
)
400 if (alloc_extshndx
!= NULL
)
401 free (alloc_extshndx
);
406 /* Look up a symbol name. */
408 bfd_elf_local_sym_name (bfd
*abfd
, Elf_Internal_Sym
*isym
)
410 unsigned int iname
= isym
->st_name
;
411 unsigned int shindex
= elf_tdata (abfd
)->symtab_hdr
.sh_link
;
412 if (iname
== 0 && ELF_ST_TYPE (isym
->st_info
) == STT_SECTION
)
414 iname
= elf_elfsections (abfd
)[isym
->st_shndx
]->sh_name
;
415 shindex
= elf_elfheader (abfd
)->e_shstrndx
;
418 return bfd_elf_string_from_elf_section (abfd
, shindex
, iname
);
421 /* Elf_Internal_Shdr->contents is an array of these for SHT_GROUP
422 sections. The first element is the flags, the rest are section
425 typedef union elf_internal_group
{
426 Elf_Internal_Shdr
*shdr
;
428 } Elf_Internal_Group
;
430 /* Return the name of the group signature symbol. Why isn't the
431 signature just a string? */
434 group_signature (bfd
*abfd
, Elf_Internal_Shdr
*ghdr
)
436 Elf_Internal_Shdr
*hdr
;
437 unsigned char esym
[sizeof (Elf64_External_Sym
)];
438 Elf_External_Sym_Shndx eshndx
;
439 Elf_Internal_Sym isym
;
441 /* First we need to ensure the symbol table is available. */
442 if (! bfd_section_from_shdr (abfd
, ghdr
->sh_link
))
445 /* Go read the symbol. */
446 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
447 if (bfd_elf_get_elf_syms (abfd
, hdr
, 1, ghdr
->sh_info
,
448 &isym
, esym
, &eshndx
) == NULL
)
451 return bfd_elf_local_sym_name (abfd
, &isym
);
454 /* Set next_in_group list pointer, and group name for NEWSECT. */
457 setup_group (bfd
*abfd
, Elf_Internal_Shdr
*hdr
, asection
*newsect
)
459 unsigned int num_group
= elf_tdata (abfd
)->num_group
;
461 /* If num_group is zero, read in all SHT_GROUP sections. The count
462 is set to -1 if there are no SHT_GROUP sections. */
465 unsigned int i
, shnum
;
467 /* First count the number of groups. If we have a SHT_GROUP
468 section with just a flag word (ie. sh_size is 4), ignore it. */
469 shnum
= elf_numsections (abfd
);
471 for (i
= 0; i
< shnum
; i
++)
473 Elf_Internal_Shdr
*shdr
= elf_elfsections (abfd
)[i
];
474 if (shdr
->sh_type
== SHT_GROUP
&& shdr
->sh_size
>= 8)
479 num_group
= (unsigned) -1;
480 elf_tdata (abfd
)->num_group
= num_group
;
484 /* We keep a list of elf section headers for group sections,
485 so we can find them quickly. */
486 bfd_size_type amt
= num_group
* sizeof (Elf_Internal_Shdr
*);
487 elf_tdata (abfd
)->group_sect_ptr
= bfd_alloc (abfd
, amt
);
488 if (elf_tdata (abfd
)->group_sect_ptr
== NULL
)
492 for (i
= 0; i
< shnum
; i
++)
494 Elf_Internal_Shdr
*shdr
= elf_elfsections (abfd
)[i
];
495 if (shdr
->sh_type
== SHT_GROUP
&& shdr
->sh_size
>= 8)
498 Elf_Internal_Group
*dest
;
500 /* Add to list of sections. */
501 elf_tdata (abfd
)->group_sect_ptr
[num_group
] = shdr
;
504 /* Read the raw contents. */
505 BFD_ASSERT (sizeof (*dest
) >= 4);
506 amt
= shdr
->sh_size
* sizeof (*dest
) / 4;
507 shdr
->contents
= bfd_alloc (abfd
, amt
);
508 if (shdr
->contents
== NULL
509 || bfd_seek (abfd
, shdr
->sh_offset
, SEEK_SET
) != 0
510 || (bfd_bread (shdr
->contents
, shdr
->sh_size
, abfd
)
514 /* Translate raw contents, a flag word followed by an
515 array of elf section indices all in target byte order,
516 to the flag word followed by an array of elf section
518 src
= shdr
->contents
+ shdr
->sh_size
;
519 dest
= (Elf_Internal_Group
*) (shdr
->contents
+ amt
);
526 idx
= H_GET_32 (abfd
, src
);
527 if (src
== shdr
->contents
)
530 if (shdr
->bfd_section
!= NULL
&& (idx
& GRP_COMDAT
))
531 shdr
->bfd_section
->flags
532 |= SEC_LINK_ONCE
| SEC_LINK_DUPLICATES_DISCARD
;
537 ((*_bfd_error_handler
)
538 (_("%B: invalid SHT_GROUP entry"), abfd
));
541 dest
->shdr
= elf_elfsections (abfd
)[idx
];
548 if (num_group
!= (unsigned) -1)
552 for (i
= 0; i
< num_group
; i
++)
554 Elf_Internal_Shdr
*shdr
= elf_tdata (abfd
)->group_sect_ptr
[i
];
555 Elf_Internal_Group
*idx
= (Elf_Internal_Group
*) shdr
->contents
;
556 unsigned int n_elt
= shdr
->sh_size
/ 4;
558 /* Look through this group's sections to see if current
559 section is a member. */
561 if ((++idx
)->shdr
== hdr
)
565 /* We are a member of this group. Go looking through
566 other members to see if any others are linked via
568 idx
= (Elf_Internal_Group
*) shdr
->contents
;
569 n_elt
= shdr
->sh_size
/ 4;
571 if ((s
= (++idx
)->shdr
->bfd_section
) != NULL
572 && elf_next_in_group (s
) != NULL
)
576 /* Snarf the group name from other member, and
577 insert current section in circular list. */
578 elf_group_name (newsect
) = elf_group_name (s
);
579 elf_next_in_group (newsect
) = elf_next_in_group (s
);
580 elf_next_in_group (s
) = newsect
;
586 gname
= group_signature (abfd
, shdr
);
589 elf_group_name (newsect
) = gname
;
591 /* Start a circular list with one element. */
592 elf_next_in_group (newsect
) = newsect
;
595 /* If the group section has been created, point to the
597 if (shdr
->bfd_section
!= NULL
)
598 elf_next_in_group (shdr
->bfd_section
) = newsect
;
606 if (elf_group_name (newsect
) == NULL
)
608 (*_bfd_error_handler
) (_("%B: no group info for section %A"),
615 _bfd_elf_setup_group_pointers (bfd
*abfd
)
618 unsigned int num_group
= elf_tdata (abfd
)->num_group
;
619 bfd_boolean result
= TRUE
;
621 if (num_group
== (unsigned) -1)
624 for (i
= 0; i
< num_group
; i
++)
626 Elf_Internal_Shdr
*shdr
= elf_tdata (abfd
)->group_sect_ptr
[i
];
627 Elf_Internal_Group
*idx
= (Elf_Internal_Group
*) shdr
->contents
;
628 unsigned int n_elt
= shdr
->sh_size
/ 4;
631 if ((++idx
)->shdr
->bfd_section
)
632 elf_sec_group (idx
->shdr
->bfd_section
) = shdr
->bfd_section
;
633 else if (idx
->shdr
->sh_type
== SHT_RELA
634 || idx
->shdr
->sh_type
== SHT_REL
)
635 /* We won't include relocation sections in section groups in
636 output object files. We adjust the group section size here
637 so that relocatable link will work correctly when
638 relocation sections are in section group in input object
640 shdr
->bfd_section
->size
-= 4;
643 /* There are some unknown sections in the group. */
644 (*_bfd_error_handler
)
645 (_("%B: unknown [%d] section `%s' in group [%s]"),
647 (unsigned int) idx
->shdr
->sh_type
,
648 elf_string_from_elf_strtab (abfd
, idx
->shdr
->sh_name
),
649 shdr
->bfd_section
->name
);
657 bfd_elf_is_group_section (bfd
*abfd ATTRIBUTE_UNUSED
, const asection
*sec
)
659 return elf_next_in_group (sec
) != NULL
;
663 bfd_elf_discard_group (bfd
*abfd ATTRIBUTE_UNUSED
,
664 asection
*group ATTRIBUTE_UNUSED
)
667 asection
*first
= elf_next_in_group (group
);
672 s
->output_section
= bfd_abs_section_ptr
;
673 s
= elf_next_in_group (s
);
674 /* These lists are circular. */
679 /* FIXME: Never used. Remove it! */
685 /* Make a BFD section from an ELF section. We store a pointer to the
686 BFD section in the bfd_section field of the header. */
689 _bfd_elf_make_section_from_shdr (bfd
*abfd
,
690 Elf_Internal_Shdr
*hdr
,
695 const struct elf_backend_data
*bed
;
697 if (hdr
->bfd_section
!= NULL
)
699 BFD_ASSERT (strcmp (name
,
700 bfd_get_section_name (abfd
, hdr
->bfd_section
)) == 0);
704 newsect
= bfd_make_section_anyway (abfd
, name
);
708 hdr
->bfd_section
= newsect
;
709 elf_section_data (newsect
)->this_hdr
= *hdr
;
711 /* Always use the real type/flags. */
712 elf_section_type (newsect
) = hdr
->sh_type
;
713 elf_section_flags (newsect
) = hdr
->sh_flags
;
715 newsect
->filepos
= hdr
->sh_offset
;
717 if (! bfd_set_section_vma (abfd
, newsect
, hdr
->sh_addr
)
718 || ! bfd_set_section_size (abfd
, newsect
, hdr
->sh_size
)
719 || ! bfd_set_section_alignment (abfd
, newsect
,
720 bfd_log2 ((bfd_vma
) hdr
->sh_addralign
)))
723 flags
= SEC_NO_FLAGS
;
724 if (hdr
->sh_type
!= SHT_NOBITS
)
725 flags
|= SEC_HAS_CONTENTS
;
726 if (hdr
->sh_type
== SHT_GROUP
)
727 flags
|= SEC_GROUP
| SEC_EXCLUDE
;
728 if ((hdr
->sh_flags
& SHF_ALLOC
) != 0)
731 if (hdr
->sh_type
!= SHT_NOBITS
)
734 if ((hdr
->sh_flags
& SHF_WRITE
) == 0)
735 flags
|= SEC_READONLY
;
736 if ((hdr
->sh_flags
& SHF_EXECINSTR
) != 0)
738 else if ((flags
& SEC_LOAD
) != 0)
740 if ((hdr
->sh_flags
& SHF_MERGE
) != 0)
743 newsect
->entsize
= hdr
->sh_entsize
;
744 if ((hdr
->sh_flags
& SHF_STRINGS
) != 0)
745 flags
|= SEC_STRINGS
;
747 if (hdr
->sh_flags
& SHF_GROUP
)
748 if (!setup_group (abfd
, hdr
, newsect
))
750 if ((hdr
->sh_flags
& SHF_TLS
) != 0)
751 flags
|= SEC_THREAD_LOCAL
;
753 /* The debugging sections appear to be recognized only by name, not
756 static const char *debug_sec_names
[] =
765 for (i
= ARRAY_SIZE (debug_sec_names
); i
--;)
766 if (strncmp (name
, debug_sec_names
[i
], strlen (debug_sec_names
[i
])) == 0)
770 flags
|= SEC_DEBUGGING
;
773 /* As a GNU extension, if the name begins with .gnu.linkonce, we
774 only link a single copy of the section. This is used to support
775 g++. g++ will emit each template expansion in its own section.
776 The symbols will be defined as weak, so that multiple definitions
777 are permitted. The GNU linker extension is to actually discard
778 all but one of the sections. */
779 if (strncmp (name
, ".gnu.linkonce", sizeof ".gnu.linkonce" - 1) == 0
780 && elf_next_in_group (newsect
) == NULL
)
781 flags
|= SEC_LINK_ONCE
| SEC_LINK_DUPLICATES_DISCARD
;
783 bed
= get_elf_backend_data (abfd
);
784 if (bed
->elf_backend_section_flags
)
785 if (! bed
->elf_backend_section_flags (&flags
, hdr
))
788 if (! bfd_set_section_flags (abfd
, newsect
, flags
))
791 if ((flags
& SEC_ALLOC
) != 0)
793 Elf_Internal_Phdr
*phdr
;
796 /* Look through the phdrs to see if we need to adjust the lma.
797 If all the p_paddr fields are zero, we ignore them, since
798 some ELF linkers produce such output. */
799 phdr
= elf_tdata (abfd
)->phdr
;
800 for (i
= 0; i
< elf_elfheader (abfd
)->e_phnum
; i
++, phdr
++)
802 if (phdr
->p_paddr
!= 0)
805 if (i
< elf_elfheader (abfd
)->e_phnum
)
807 phdr
= elf_tdata (abfd
)->phdr
;
808 for (i
= 0; i
< elf_elfheader (abfd
)->e_phnum
; i
++, phdr
++)
810 /* This section is part of this segment if its file
811 offset plus size lies within the segment's memory
812 span and, if the section is loaded, the extent of the
813 loaded data lies within the extent of the segment.
815 Note - we used to check the p_paddr field as well, and
816 refuse to set the LMA if it was 0. This is wrong
817 though, as a perfectly valid initialised segment can
818 have a p_paddr of zero. Some architectures, eg ARM,
819 place special significance on the address 0 and
820 executables need to be able to have a segment which
821 covers this address. */
822 if (phdr
->p_type
== PT_LOAD
823 && (bfd_vma
) hdr
->sh_offset
>= phdr
->p_offset
824 && (hdr
->sh_offset
+ hdr
->sh_size
825 <= phdr
->p_offset
+ phdr
->p_memsz
)
826 && ((flags
& SEC_LOAD
) == 0
827 || (hdr
->sh_offset
+ hdr
->sh_size
828 <= phdr
->p_offset
+ phdr
->p_filesz
)))
830 if ((flags
& SEC_LOAD
) == 0)
831 newsect
->lma
= (phdr
->p_paddr
832 + hdr
->sh_addr
- phdr
->p_vaddr
);
834 /* We used to use the same adjustment for SEC_LOAD
835 sections, but that doesn't work if the segment
836 is packed with code from multiple VMAs.
837 Instead we calculate the section LMA based on
838 the segment LMA. It is assumed that the
839 segment will contain sections with contiguous
840 LMAs, even if the VMAs are not. */
841 newsect
->lma
= (phdr
->p_paddr
842 + hdr
->sh_offset
- phdr
->p_offset
);
844 /* With contiguous segments, we can't tell from file
845 offsets whether a section with zero size should
846 be placed at the end of one segment or the
847 beginning of the next. Decide based on vaddr. */
848 if (hdr
->sh_addr
>= phdr
->p_vaddr
849 && (hdr
->sh_addr
+ hdr
->sh_size
850 <= phdr
->p_vaddr
+ phdr
->p_memsz
))
865 struct elf_internal_shdr *bfd_elf_find_section (bfd *abfd, char *name);
868 Helper functions for GDB to locate the string tables.
869 Since BFD hides string tables from callers, GDB needs to use an
870 internal hook to find them. Sun's .stabstr, in particular,
871 isn't even pointed to by the .stab section, so ordinary
872 mechanisms wouldn't work to find it, even if we had some.
875 struct elf_internal_shdr
*
876 bfd_elf_find_section (bfd
*abfd
, char *name
)
878 Elf_Internal_Shdr
**i_shdrp
;
883 i_shdrp
= elf_elfsections (abfd
);
886 shstrtab
= bfd_elf_get_str_section (abfd
,
887 elf_elfheader (abfd
)->e_shstrndx
);
888 if (shstrtab
!= NULL
)
890 max
= elf_numsections (abfd
);
891 for (i
= 1; i
< max
; i
++)
892 if (!strcmp (&shstrtab
[i_shdrp
[i
]->sh_name
], name
))
899 const char *const bfd_elf_section_type_names
[] = {
900 "SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB",
901 "SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE",
902 "SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM",
905 /* ELF relocs are against symbols. If we are producing relocatable
906 output, and the reloc is against an external symbol, and nothing
907 has given us any additional addend, the resulting reloc will also
908 be against the same symbol. In such a case, we don't want to
909 change anything about the way the reloc is handled, since it will
910 all be done at final link time. Rather than put special case code
911 into bfd_perform_relocation, all the reloc types use this howto
912 function. It just short circuits the reloc if producing
913 relocatable output against an external symbol. */
915 bfd_reloc_status_type
916 bfd_elf_generic_reloc (bfd
*abfd ATTRIBUTE_UNUSED
,
917 arelent
*reloc_entry
,
919 void *data ATTRIBUTE_UNUSED
,
920 asection
*input_section
,
922 char **error_message ATTRIBUTE_UNUSED
)
924 if (output_bfd
!= NULL
925 && (symbol
->flags
& BSF_SECTION_SYM
) == 0
926 && (! reloc_entry
->howto
->partial_inplace
927 || reloc_entry
->addend
== 0))
929 reloc_entry
->address
+= input_section
->output_offset
;
933 return bfd_reloc_continue
;
936 /* Make sure sec_info_type is cleared if sec_info is cleared too. */
939 merge_sections_remove_hook (bfd
*abfd ATTRIBUTE_UNUSED
,
942 BFD_ASSERT (sec
->sec_info_type
== ELF_INFO_TYPE_MERGE
);
943 sec
->sec_info_type
= ELF_INFO_TYPE_NONE
;
946 /* Finish SHF_MERGE section merging. */
949 _bfd_elf_merge_sections (bfd
*abfd
, struct bfd_link_info
*info
)
954 if (!is_elf_hash_table (info
->hash
))
957 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
958 if ((ibfd
->flags
& DYNAMIC
) == 0)
959 for (sec
= ibfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
960 if ((sec
->flags
& SEC_MERGE
) != 0
961 && !bfd_is_abs_section (sec
->output_section
))
963 struct bfd_elf_section_data
*secdata
;
965 secdata
= elf_section_data (sec
);
966 if (! _bfd_add_merge_section (abfd
,
967 &elf_hash_table (info
)->merge_info
,
968 sec
, &secdata
->sec_info
))
970 else if (secdata
->sec_info
)
971 sec
->sec_info_type
= ELF_INFO_TYPE_MERGE
;
974 if (elf_hash_table (info
)->merge_info
!= NULL
)
975 _bfd_merge_sections (abfd
, info
, elf_hash_table (info
)->merge_info
,
976 merge_sections_remove_hook
);
981 _bfd_elf_link_just_syms (asection
*sec
, struct bfd_link_info
*info
)
983 sec
->output_section
= bfd_abs_section_ptr
;
984 sec
->output_offset
= sec
->vma
;
985 if (!is_elf_hash_table (info
->hash
))
988 sec
->sec_info_type
= ELF_INFO_TYPE_JUST_SYMS
;
991 /* Copy the program header and other data from one object module to
995 _bfd_elf_copy_private_bfd_data (bfd
*ibfd
, bfd
*obfd
)
997 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
998 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
1001 BFD_ASSERT (!elf_flags_init (obfd
)
1002 || (elf_elfheader (obfd
)->e_flags
1003 == elf_elfheader (ibfd
)->e_flags
));
1005 elf_gp (obfd
) = elf_gp (ibfd
);
1006 elf_elfheader (obfd
)->e_flags
= elf_elfheader (ibfd
)->e_flags
;
1007 elf_flags_init (obfd
) = TRUE
;
1011 /* Print out the program headers. */
1014 _bfd_elf_print_private_bfd_data (bfd
*abfd
, void *farg
)
1017 Elf_Internal_Phdr
*p
;
1019 bfd_byte
*dynbuf
= NULL
;
1021 p
= elf_tdata (abfd
)->phdr
;
1026 fprintf (f
, _("\nProgram Header:\n"));
1027 c
= elf_elfheader (abfd
)->e_phnum
;
1028 for (i
= 0; i
< c
; i
++, p
++)
1035 case PT_NULL
: pt
= "NULL"; break;
1036 case PT_LOAD
: pt
= "LOAD"; break;
1037 case PT_DYNAMIC
: pt
= "DYNAMIC"; break;
1038 case PT_INTERP
: pt
= "INTERP"; break;
1039 case PT_NOTE
: pt
= "NOTE"; break;
1040 case PT_SHLIB
: pt
= "SHLIB"; break;
1041 case PT_PHDR
: pt
= "PHDR"; break;
1042 case PT_TLS
: pt
= "TLS"; break;
1043 case PT_GNU_EH_FRAME
: pt
= "EH_FRAME"; break;
1044 case PT_GNU_STACK
: pt
= "STACK"; break;
1045 case PT_GNU_RELRO
: pt
= "RELRO"; break;
1046 default: sprintf (buf
, "0x%lx", p
->p_type
); pt
= buf
; break;
1048 fprintf (f
, "%8s off 0x", pt
);
1049 bfd_fprintf_vma (abfd
, f
, p
->p_offset
);
1050 fprintf (f
, " vaddr 0x");
1051 bfd_fprintf_vma (abfd
, f
, p
->p_vaddr
);
1052 fprintf (f
, " paddr 0x");
1053 bfd_fprintf_vma (abfd
, f
, p
->p_paddr
);
1054 fprintf (f
, " align 2**%u\n", bfd_log2 (p
->p_align
));
1055 fprintf (f
, " filesz 0x");
1056 bfd_fprintf_vma (abfd
, f
, p
->p_filesz
);
1057 fprintf (f
, " memsz 0x");
1058 bfd_fprintf_vma (abfd
, f
, p
->p_memsz
);
1059 fprintf (f
, " flags %c%c%c",
1060 (p
->p_flags
& PF_R
) != 0 ? 'r' : '-',
1061 (p
->p_flags
& PF_W
) != 0 ? 'w' : '-',
1062 (p
->p_flags
& PF_X
) != 0 ? 'x' : '-');
1063 if ((p
->p_flags
&~ (unsigned) (PF_R
| PF_W
| PF_X
)) != 0)
1064 fprintf (f
, " %lx", p
->p_flags
&~ (unsigned) (PF_R
| PF_W
| PF_X
));
1069 s
= bfd_get_section_by_name (abfd
, ".dynamic");
1073 unsigned long shlink
;
1074 bfd_byte
*extdyn
, *extdynend
;
1076 void (*swap_dyn_in
) (bfd
*, const void *, Elf_Internal_Dyn
*);
1078 fprintf (f
, _("\nDynamic Section:\n"));
1080 if (!bfd_malloc_and_get_section (abfd
, s
, &dynbuf
))
1083 elfsec
= _bfd_elf_section_from_bfd_section (abfd
, s
);
1086 shlink
= elf_elfsections (abfd
)[elfsec
]->sh_link
;
1088 extdynsize
= get_elf_backend_data (abfd
)->s
->sizeof_dyn
;
1089 swap_dyn_in
= get_elf_backend_data (abfd
)->s
->swap_dyn_in
;
1092 extdynend
= extdyn
+ s
->size
;
1093 for (; extdyn
< extdynend
; extdyn
+= extdynsize
)
1095 Elf_Internal_Dyn dyn
;
1098 bfd_boolean stringp
;
1100 (*swap_dyn_in
) (abfd
, extdyn
, &dyn
);
1102 if (dyn
.d_tag
== DT_NULL
)
1109 sprintf (ab
, "0x%lx", (unsigned long) dyn
.d_tag
);
1113 case DT_NEEDED
: name
= "NEEDED"; stringp
= TRUE
; break;
1114 case DT_PLTRELSZ
: name
= "PLTRELSZ"; break;
1115 case DT_PLTGOT
: name
= "PLTGOT"; break;
1116 case DT_HASH
: name
= "HASH"; break;
1117 case DT_STRTAB
: name
= "STRTAB"; break;
1118 case DT_SYMTAB
: name
= "SYMTAB"; break;
1119 case DT_RELA
: name
= "RELA"; break;
1120 case DT_RELASZ
: name
= "RELASZ"; break;
1121 case DT_RELAENT
: name
= "RELAENT"; break;
1122 case DT_STRSZ
: name
= "STRSZ"; break;
1123 case DT_SYMENT
: name
= "SYMENT"; break;
1124 case DT_INIT
: name
= "INIT"; break;
1125 case DT_FINI
: name
= "FINI"; break;
1126 case DT_SONAME
: name
= "SONAME"; stringp
= TRUE
; break;
1127 case DT_RPATH
: name
= "RPATH"; stringp
= TRUE
; break;
1128 case DT_SYMBOLIC
: name
= "SYMBOLIC"; break;
1129 case DT_REL
: name
= "REL"; break;
1130 case DT_RELSZ
: name
= "RELSZ"; break;
1131 case DT_RELENT
: name
= "RELENT"; break;
1132 case DT_PLTREL
: name
= "PLTREL"; break;
1133 case DT_DEBUG
: name
= "DEBUG"; break;
1134 case DT_TEXTREL
: name
= "TEXTREL"; break;
1135 case DT_JMPREL
: name
= "JMPREL"; break;
1136 case DT_BIND_NOW
: name
= "BIND_NOW"; break;
1137 case DT_INIT_ARRAY
: name
= "INIT_ARRAY"; break;
1138 case DT_FINI_ARRAY
: name
= "FINI_ARRAY"; break;
1139 case DT_INIT_ARRAYSZ
: name
= "INIT_ARRAYSZ"; break;
1140 case DT_FINI_ARRAYSZ
: name
= "FINI_ARRAYSZ"; break;
1141 case DT_RUNPATH
: name
= "RUNPATH"; stringp
= TRUE
; break;
1142 case DT_FLAGS
: name
= "FLAGS"; break;
1143 case DT_PREINIT_ARRAY
: name
= "PREINIT_ARRAY"; break;
1144 case DT_PREINIT_ARRAYSZ
: name
= "PREINIT_ARRAYSZ"; break;
1145 case DT_CHECKSUM
: name
= "CHECKSUM"; break;
1146 case DT_PLTPADSZ
: name
= "PLTPADSZ"; break;
1147 case DT_MOVEENT
: name
= "MOVEENT"; break;
1148 case DT_MOVESZ
: name
= "MOVESZ"; break;
1149 case DT_FEATURE
: name
= "FEATURE"; break;
1150 case DT_POSFLAG_1
: name
= "POSFLAG_1"; break;
1151 case DT_SYMINSZ
: name
= "SYMINSZ"; break;
1152 case DT_SYMINENT
: name
= "SYMINENT"; break;
1153 case DT_CONFIG
: name
= "CONFIG"; stringp
= TRUE
; break;
1154 case DT_DEPAUDIT
: name
= "DEPAUDIT"; stringp
= TRUE
; break;
1155 case DT_AUDIT
: name
= "AUDIT"; stringp
= TRUE
; break;
1156 case DT_PLTPAD
: name
= "PLTPAD"; break;
1157 case DT_MOVETAB
: name
= "MOVETAB"; break;
1158 case DT_SYMINFO
: name
= "SYMINFO"; break;
1159 case DT_RELACOUNT
: name
= "RELACOUNT"; break;
1160 case DT_RELCOUNT
: name
= "RELCOUNT"; break;
1161 case DT_FLAGS_1
: name
= "FLAGS_1"; break;
1162 case DT_VERSYM
: name
= "VERSYM"; break;
1163 case DT_VERDEF
: name
= "VERDEF"; break;
1164 case DT_VERDEFNUM
: name
= "VERDEFNUM"; break;
1165 case DT_VERNEED
: name
= "VERNEED"; break;
1166 case DT_VERNEEDNUM
: name
= "VERNEEDNUM"; break;
1167 case DT_AUXILIARY
: name
= "AUXILIARY"; stringp
= TRUE
; break;
1168 case DT_USED
: name
= "USED"; break;
1169 case DT_FILTER
: name
= "FILTER"; stringp
= TRUE
; break;
1172 fprintf (f
, " %-11s ", name
);
1174 fprintf (f
, "0x%lx", (unsigned long) dyn
.d_un
.d_val
);
1178 unsigned int tagv
= dyn
.d_un
.d_val
;
1180 string
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
1183 fprintf (f
, "%s", string
);
1192 if ((elf_dynverdef (abfd
) != 0 && elf_tdata (abfd
)->verdef
== NULL
)
1193 || (elf_dynverref (abfd
) != 0 && elf_tdata (abfd
)->verref
== NULL
))
1195 if (! _bfd_elf_slurp_version_tables (abfd
))
1199 if (elf_dynverdef (abfd
) != 0)
1201 Elf_Internal_Verdef
*t
;
1203 fprintf (f
, _("\nVersion definitions:\n"));
1204 for (t
= elf_tdata (abfd
)->verdef
; t
!= NULL
; t
= t
->vd_nextdef
)
1206 fprintf (f
, "%d 0x%2.2x 0x%8.8lx %s\n", t
->vd_ndx
,
1207 t
->vd_flags
, t
->vd_hash
, t
->vd_nodename
);
1208 if (t
->vd_auxptr
->vda_nextptr
!= NULL
)
1210 Elf_Internal_Verdaux
*a
;
1213 for (a
= t
->vd_auxptr
->vda_nextptr
;
1216 fprintf (f
, "%s ", a
->vda_nodename
);
1222 if (elf_dynverref (abfd
) != 0)
1224 Elf_Internal_Verneed
*t
;
1226 fprintf (f
, _("\nVersion References:\n"));
1227 for (t
= elf_tdata (abfd
)->verref
; t
!= NULL
; t
= t
->vn_nextref
)
1229 Elf_Internal_Vernaux
*a
;
1231 fprintf (f
, _(" required from %s:\n"), t
->vn_filename
);
1232 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
1233 fprintf (f
, " 0x%8.8lx 0x%2.2x %2.2d %s\n", a
->vna_hash
,
1234 a
->vna_flags
, a
->vna_other
, a
->vna_nodename
);
1246 /* Display ELF-specific fields of a symbol. */
1249 bfd_elf_print_symbol (bfd
*abfd
,
1252 bfd_print_symbol_type how
)
1257 case bfd_print_symbol_name
:
1258 fprintf (file
, "%s", symbol
->name
);
1260 case bfd_print_symbol_more
:
1261 fprintf (file
, "elf ");
1262 bfd_fprintf_vma (abfd
, file
, symbol
->value
);
1263 fprintf (file
, " %lx", (long) symbol
->flags
);
1265 case bfd_print_symbol_all
:
1267 const char *section_name
;
1268 const char *name
= NULL
;
1269 const struct elf_backend_data
*bed
;
1270 unsigned char st_other
;
1273 section_name
= symbol
->section
? symbol
->section
->name
: "(*none*)";
1275 bed
= get_elf_backend_data (abfd
);
1276 if (bed
->elf_backend_print_symbol_all
)
1277 name
= (*bed
->elf_backend_print_symbol_all
) (abfd
, filep
, symbol
);
1281 name
= symbol
->name
;
1282 bfd_print_symbol_vandf (abfd
, file
, symbol
);
1285 fprintf (file
, " %s\t", section_name
);
1286 /* Print the "other" value for a symbol. For common symbols,
1287 we've already printed the size; now print the alignment.
1288 For other symbols, we have no specified alignment, and
1289 we've printed the address; now print the size. */
1290 if (bfd_is_com_section (symbol
->section
))
1291 val
= ((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_value
;
1293 val
= ((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_size
;
1294 bfd_fprintf_vma (abfd
, file
, val
);
1296 /* If we have version information, print it. */
1297 if (elf_tdata (abfd
)->dynversym_section
!= 0
1298 && (elf_tdata (abfd
)->dynverdef_section
!= 0
1299 || elf_tdata (abfd
)->dynverref_section
!= 0))
1301 unsigned int vernum
;
1302 const char *version_string
;
1304 vernum
= ((elf_symbol_type
*) symbol
)->version
& VERSYM_VERSION
;
1307 version_string
= "";
1308 else if (vernum
== 1)
1309 version_string
= "Base";
1310 else if (vernum
<= elf_tdata (abfd
)->cverdefs
)
1312 elf_tdata (abfd
)->verdef
[vernum
- 1].vd_nodename
;
1315 Elf_Internal_Verneed
*t
;
1317 version_string
= "";
1318 for (t
= elf_tdata (abfd
)->verref
;
1322 Elf_Internal_Vernaux
*a
;
1324 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
1326 if (a
->vna_other
== vernum
)
1328 version_string
= a
->vna_nodename
;
1335 if ((((elf_symbol_type
*) symbol
)->version
& VERSYM_HIDDEN
) == 0)
1336 fprintf (file
, " %-11s", version_string
);
1341 fprintf (file
, " (%s)", version_string
);
1342 for (i
= 10 - strlen (version_string
); i
> 0; --i
)
1347 /* If the st_other field is not zero, print it. */
1348 st_other
= ((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_other
;
1353 case STV_INTERNAL
: fprintf (file
, " .internal"); break;
1354 case STV_HIDDEN
: fprintf (file
, " .hidden"); break;
1355 case STV_PROTECTED
: fprintf (file
, " .protected"); break;
1357 /* Some other non-defined flags are also present, so print
1359 fprintf (file
, " 0x%02x", (unsigned int) st_other
);
1362 fprintf (file
, " %s", name
);
1368 /* Create an entry in an ELF linker hash table. */
1370 struct bfd_hash_entry
*
1371 _bfd_elf_link_hash_newfunc (struct bfd_hash_entry
*entry
,
1372 struct bfd_hash_table
*table
,
1375 /* Allocate the structure if it has not already been allocated by a
1379 entry
= bfd_hash_allocate (table
, sizeof (struct elf_link_hash_entry
));
1384 /* Call the allocation method of the superclass. */
1385 entry
= _bfd_link_hash_newfunc (entry
, table
, string
);
1388 struct elf_link_hash_entry
*ret
= (struct elf_link_hash_entry
*) entry
;
1389 struct elf_link_hash_table
*htab
= (struct elf_link_hash_table
*) table
;
1391 /* Set local fields. */
1394 ret
->dynstr_index
= 0;
1395 ret
->elf_hash_value
= 0;
1396 ret
->weakdef
= NULL
;
1397 ret
->verinfo
.verdef
= NULL
;
1398 ret
->vtable_entries_size
= 0;
1399 ret
->vtable_entries_used
= NULL
;
1400 ret
->vtable_parent
= NULL
;
1401 ret
->got
= htab
->init_refcount
;
1402 ret
->plt
= htab
->init_refcount
;
1404 ret
->type
= STT_NOTYPE
;
1406 /* Assume that we have been called by a non-ELF symbol reader.
1407 This flag is then reset by the code which reads an ELF input
1408 file. This ensures that a symbol created by a non-ELF symbol
1409 reader will have the flag set correctly. */
1410 ret
->ref_regular
= 0;
1411 ret
->def_regular
= 0;
1412 ret
->ref_dynamic
= 0;
1413 ret
->def_dynamic
= 0;
1414 ret
->ref_regular_nonweak
= 0;
1415 ret
->dynamic_adjusted
= 0;
1416 ret
->needs_copy
= 0;
1420 ret
->forced_local
= 0;
1422 ret
->non_got_ref
= 0;
1423 ret
->dynamic_def
= 0;
1424 ret
->dynamic_weak
= 0;
1425 ret
->pointer_equality_needed
= 0;
1431 /* Copy data from an indirect symbol to its direct symbol, hiding the
1432 old indirect symbol. Also used for copying flags to a weakdef. */
1435 _bfd_elf_link_hash_copy_indirect (const struct elf_backend_data
*bed
,
1436 struct elf_link_hash_entry
*dir
,
1437 struct elf_link_hash_entry
*ind
)
1440 bfd_signed_vma lowest_valid
= bed
->can_refcount
;
1442 /* Copy down any references that we may have already seen to the
1443 symbol which just became indirect. */
1445 dir
->ref_dynamic
|= ind
->ref_dynamic
;
1446 dir
->ref_regular
|= ind
->ref_regular
;
1447 dir
->ref_regular_nonweak
|= ind
->ref_regular_nonweak
;
1448 dir
->non_got_ref
|= ind
->non_got_ref
;
1449 dir
->needs_plt
|= ind
->needs_plt
;
1450 dir
->pointer_equality_needed
|= ind
->pointer_equality_needed
;
1452 if (ind
->root
.type
!= bfd_link_hash_indirect
)
1455 /* Copy over the global and procedure linkage table refcount entries.
1456 These may have been already set up by a check_relocs routine. */
1457 tmp
= dir
->got
.refcount
;
1458 if (tmp
< lowest_valid
)
1460 dir
->got
.refcount
= ind
->got
.refcount
;
1461 ind
->got
.refcount
= tmp
;
1464 BFD_ASSERT (ind
->got
.refcount
< lowest_valid
);
1466 tmp
= dir
->plt
.refcount
;
1467 if (tmp
< lowest_valid
)
1469 dir
->plt
.refcount
= ind
->plt
.refcount
;
1470 ind
->plt
.refcount
= tmp
;
1473 BFD_ASSERT (ind
->plt
.refcount
< lowest_valid
);
1475 if (dir
->dynindx
== -1)
1477 dir
->dynindx
= ind
->dynindx
;
1478 dir
->dynstr_index
= ind
->dynstr_index
;
1480 ind
->dynstr_index
= 0;
1483 BFD_ASSERT (ind
->dynindx
== -1);
1487 _bfd_elf_link_hash_hide_symbol (struct bfd_link_info
*info
,
1488 struct elf_link_hash_entry
*h
,
1489 bfd_boolean force_local
)
1491 h
->plt
= elf_hash_table (info
)->init_offset
;
1495 h
->forced_local
= 1;
1496 if (h
->dynindx
!= -1)
1499 _bfd_elf_strtab_delref (elf_hash_table (info
)->dynstr
,
1505 /* Initialize an ELF linker hash table. */
1508 _bfd_elf_link_hash_table_init
1509 (struct elf_link_hash_table
*table
,
1511 struct bfd_hash_entry
*(*newfunc
) (struct bfd_hash_entry
*,
1512 struct bfd_hash_table
*,
1517 table
->dynamic_sections_created
= FALSE
;
1518 table
->dynobj
= NULL
;
1519 /* Make sure can_refcount is extended to the width and signedness of
1520 init_refcount before we subtract one from it. */
1521 table
->init_refcount
.refcount
= get_elf_backend_data (abfd
)->can_refcount
;
1522 table
->init_refcount
.refcount
-= 1;
1523 table
->init_offset
.offset
= -(bfd_vma
) 1;
1524 /* The first dynamic symbol is a dummy. */
1525 table
->dynsymcount
= 1;
1526 table
->dynstr
= NULL
;
1527 table
->bucketcount
= 0;
1528 table
->needed
= NULL
;
1530 table
->merge_info
= NULL
;
1531 memset (&table
->stab_info
, 0, sizeof (table
->stab_info
));
1532 memset (&table
->eh_info
, 0, sizeof (table
->eh_info
));
1533 table
->dynlocal
= NULL
;
1534 table
->runpath
= NULL
;
1535 table
->tls_sec
= NULL
;
1536 table
->tls_size
= 0;
1537 table
->loaded
= NULL
;
1539 ret
= _bfd_link_hash_table_init (&table
->root
, abfd
, newfunc
);
1540 table
->root
.type
= bfd_link_elf_hash_table
;
1545 /* Create an ELF linker hash table. */
1547 struct bfd_link_hash_table
*
1548 _bfd_elf_link_hash_table_create (bfd
*abfd
)
1550 struct elf_link_hash_table
*ret
;
1551 bfd_size_type amt
= sizeof (struct elf_link_hash_table
);
1553 ret
= bfd_malloc (amt
);
1557 if (! _bfd_elf_link_hash_table_init (ret
, abfd
, _bfd_elf_link_hash_newfunc
))
1566 /* This is a hook for the ELF emulation code in the generic linker to
1567 tell the backend linker what file name to use for the DT_NEEDED
1568 entry for a dynamic object. */
1571 bfd_elf_set_dt_needed_name (bfd
*abfd
, const char *name
)
1573 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1574 && bfd_get_format (abfd
) == bfd_object
)
1575 elf_dt_name (abfd
) = name
;
1579 bfd_elf_get_dyn_lib_class (bfd
*abfd
)
1582 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1583 && bfd_get_format (abfd
) == bfd_object
)
1584 lib_class
= elf_dyn_lib_class (abfd
);
1591 bfd_elf_set_dyn_lib_class (bfd
*abfd
, int lib_class
)
1593 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1594 && bfd_get_format (abfd
) == bfd_object
)
1595 elf_dyn_lib_class (abfd
) = lib_class
;
1598 /* Get the list of DT_NEEDED entries for a link. This is a hook for
1599 the linker ELF emulation code. */
1601 struct bfd_link_needed_list
*
1602 bfd_elf_get_needed_list (bfd
*abfd ATTRIBUTE_UNUSED
,
1603 struct bfd_link_info
*info
)
1605 if (! is_elf_hash_table (info
->hash
))
1607 return elf_hash_table (info
)->needed
;
1610 /* Get the list of DT_RPATH/DT_RUNPATH entries for a link. This is a
1611 hook for the linker ELF emulation code. */
1613 struct bfd_link_needed_list
*
1614 bfd_elf_get_runpath_list (bfd
*abfd ATTRIBUTE_UNUSED
,
1615 struct bfd_link_info
*info
)
1617 if (! is_elf_hash_table (info
->hash
))
1619 return elf_hash_table (info
)->runpath
;
1622 /* Get the name actually used for a dynamic object for a link. This
1623 is the SONAME entry if there is one. Otherwise, it is the string
1624 passed to bfd_elf_set_dt_needed_name, or it is the filename. */
1627 bfd_elf_get_dt_soname (bfd
*abfd
)
1629 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1630 && bfd_get_format (abfd
) == bfd_object
)
1631 return elf_dt_name (abfd
);
1635 /* Get the list of DT_NEEDED entries from a BFD. This is a hook for
1636 the ELF linker emulation code. */
1639 bfd_elf_get_bfd_needed_list (bfd
*abfd
,
1640 struct bfd_link_needed_list
**pneeded
)
1643 bfd_byte
*dynbuf
= NULL
;
1645 unsigned long shlink
;
1646 bfd_byte
*extdyn
, *extdynend
;
1648 void (*swap_dyn_in
) (bfd
*, const void *, Elf_Internal_Dyn
*);
1652 if (bfd_get_flavour (abfd
) != bfd_target_elf_flavour
1653 || bfd_get_format (abfd
) != bfd_object
)
1656 s
= bfd_get_section_by_name (abfd
, ".dynamic");
1657 if (s
== NULL
|| s
->size
== 0)
1660 if (!bfd_malloc_and_get_section (abfd
, s
, &dynbuf
))
1663 elfsec
= _bfd_elf_section_from_bfd_section (abfd
, s
);
1667 shlink
= elf_elfsections (abfd
)[elfsec
]->sh_link
;
1669 extdynsize
= get_elf_backend_data (abfd
)->s
->sizeof_dyn
;
1670 swap_dyn_in
= get_elf_backend_data (abfd
)->s
->swap_dyn_in
;
1673 extdynend
= extdyn
+ s
->size
;
1674 for (; extdyn
< extdynend
; extdyn
+= extdynsize
)
1676 Elf_Internal_Dyn dyn
;
1678 (*swap_dyn_in
) (abfd
, extdyn
, &dyn
);
1680 if (dyn
.d_tag
== DT_NULL
)
1683 if (dyn
.d_tag
== DT_NEEDED
)
1686 struct bfd_link_needed_list
*l
;
1687 unsigned int tagv
= dyn
.d_un
.d_val
;
1690 string
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
1695 l
= bfd_alloc (abfd
, amt
);
1716 /* Allocate an ELF string table--force the first byte to be zero. */
1718 struct bfd_strtab_hash
*
1719 _bfd_elf_stringtab_init (void)
1721 struct bfd_strtab_hash
*ret
;
1723 ret
= _bfd_stringtab_init ();
1728 loc
= _bfd_stringtab_add (ret
, "", TRUE
, FALSE
);
1729 BFD_ASSERT (loc
== 0 || loc
== (bfd_size_type
) -1);
1730 if (loc
== (bfd_size_type
) -1)
1732 _bfd_stringtab_free (ret
);
1739 /* ELF .o/exec file reading */
1741 /* Create a new bfd section from an ELF section header. */
1744 bfd_section_from_shdr (bfd
*abfd
, unsigned int shindex
)
1746 Elf_Internal_Shdr
*hdr
= elf_elfsections (abfd
)[shindex
];
1747 Elf_Internal_Ehdr
*ehdr
= elf_elfheader (abfd
);
1748 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
1751 name
= elf_string_from_elf_strtab (abfd
, hdr
->sh_name
);
1753 switch (hdr
->sh_type
)
1756 /* Inactive section. Throw it away. */
1759 case SHT_PROGBITS
: /* Normal section with contents. */
1760 case SHT_NOBITS
: /* .bss section. */
1761 case SHT_HASH
: /* .hash section. */
1762 case SHT_NOTE
: /* .note section. */
1763 case SHT_INIT_ARRAY
: /* .init_array section. */
1764 case SHT_FINI_ARRAY
: /* .fini_array section. */
1765 case SHT_PREINIT_ARRAY
: /* .preinit_array section. */
1766 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1768 case SHT_DYNAMIC
: /* Dynamic linking information. */
1769 if (! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
))
1771 if (elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_STRTAB
)
1773 Elf_Internal_Shdr
*dynsymhdr
;
1775 /* The shared libraries distributed with hpux11 have a bogus
1776 sh_link field for the ".dynamic" section. Find the
1777 string table for the ".dynsym" section instead. */
1778 if (elf_dynsymtab (abfd
) != 0)
1780 dynsymhdr
= elf_elfsections (abfd
)[elf_dynsymtab (abfd
)];
1781 hdr
->sh_link
= dynsymhdr
->sh_link
;
1785 unsigned int i
, num_sec
;
1787 num_sec
= elf_numsections (abfd
);
1788 for (i
= 1; i
< num_sec
; i
++)
1790 dynsymhdr
= elf_elfsections (abfd
)[i
];
1791 if (dynsymhdr
->sh_type
== SHT_DYNSYM
)
1793 hdr
->sh_link
= dynsymhdr
->sh_link
;
1801 case SHT_SYMTAB
: /* A symbol table */
1802 if (elf_onesymtab (abfd
) == shindex
)
1805 BFD_ASSERT (hdr
->sh_entsize
== bed
->s
->sizeof_sym
);
1806 BFD_ASSERT (elf_onesymtab (abfd
) == 0);
1807 elf_onesymtab (abfd
) = shindex
;
1808 elf_tdata (abfd
)->symtab_hdr
= *hdr
;
1809 elf_elfsections (abfd
)[shindex
] = hdr
= &elf_tdata (abfd
)->symtab_hdr
;
1810 abfd
->flags
|= HAS_SYMS
;
1812 /* Sometimes a shared object will map in the symbol table. If
1813 SHF_ALLOC is set, and this is a shared object, then we also
1814 treat this section as a BFD section. We can not base the
1815 decision purely on SHF_ALLOC, because that flag is sometimes
1816 set in a relocatable object file, which would confuse the
1818 if ((hdr
->sh_flags
& SHF_ALLOC
) != 0
1819 && (abfd
->flags
& DYNAMIC
) != 0
1820 && ! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
))
1825 case SHT_DYNSYM
: /* A dynamic symbol table */
1826 if (elf_dynsymtab (abfd
) == shindex
)
1829 BFD_ASSERT (hdr
->sh_entsize
== bed
->s
->sizeof_sym
);
1830 BFD_ASSERT (elf_dynsymtab (abfd
) == 0);
1831 elf_dynsymtab (abfd
) = shindex
;
1832 elf_tdata (abfd
)->dynsymtab_hdr
= *hdr
;
1833 elf_elfsections (abfd
)[shindex
] = hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
1834 abfd
->flags
|= HAS_SYMS
;
1836 /* Besides being a symbol table, we also treat this as a regular
1837 section, so that objcopy can handle it. */
1838 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1840 case SHT_SYMTAB_SHNDX
: /* Symbol section indices when >64k sections */
1841 if (elf_symtab_shndx (abfd
) == shindex
)
1844 /* Get the associated symbol table. */
1845 if (! bfd_section_from_shdr (abfd
, hdr
->sh_link
)
1846 || hdr
->sh_link
!= elf_onesymtab (abfd
))
1849 elf_symtab_shndx (abfd
) = shindex
;
1850 elf_tdata (abfd
)->symtab_shndx_hdr
= *hdr
;
1851 elf_elfsections (abfd
)[shindex
] = &elf_tdata (abfd
)->symtab_shndx_hdr
;
1854 case SHT_STRTAB
: /* A string table */
1855 if (hdr
->bfd_section
!= NULL
)
1857 if (ehdr
->e_shstrndx
== shindex
)
1859 elf_tdata (abfd
)->shstrtab_hdr
= *hdr
;
1860 elf_elfsections (abfd
)[shindex
] = &elf_tdata (abfd
)->shstrtab_hdr
;
1864 unsigned int i
, num_sec
;
1866 num_sec
= elf_numsections (abfd
);
1867 for (i
= 1; i
< num_sec
; i
++)
1869 Elf_Internal_Shdr
*hdr2
= elf_elfsections (abfd
)[i
];
1870 if (hdr2
->sh_link
== shindex
)
1872 if (! bfd_section_from_shdr (abfd
, i
))
1874 if (elf_onesymtab (abfd
) == i
)
1876 elf_tdata (abfd
)->strtab_hdr
= *hdr
;
1877 elf_elfsections (abfd
)[shindex
] =
1878 &elf_tdata (abfd
)->strtab_hdr
;
1881 if (elf_dynsymtab (abfd
) == i
)
1883 elf_tdata (abfd
)->dynstrtab_hdr
= *hdr
;
1884 elf_elfsections (abfd
)[shindex
] = hdr
=
1885 &elf_tdata (abfd
)->dynstrtab_hdr
;
1886 /* We also treat this as a regular section, so
1887 that objcopy can handle it. */
1890 #if 0 /* Not handling other string tables specially right now. */
1891 hdr2
= elf_elfsections (abfd
)[i
]; /* in case it moved */
1892 /* We have a strtab for some random other section. */
1893 newsect
= (asection
*) hdr2
->bfd_section
;
1896 hdr
->bfd_section
= newsect
;
1897 hdr2
= &elf_section_data (newsect
)->str_hdr
;
1899 elf_elfsections (abfd
)[shindex
] = hdr2
;
1905 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1909 /* *These* do a lot of work -- but build no sections! */
1911 asection
*target_sect
;
1912 Elf_Internal_Shdr
*hdr2
;
1913 unsigned int num_sec
= elf_numsections (abfd
);
1915 /* Check for a bogus link to avoid crashing. */
1916 if ((hdr
->sh_link
>= SHN_LORESERVE
&& hdr
->sh_link
<= SHN_HIRESERVE
)
1917 || hdr
->sh_link
>= num_sec
)
1919 ((*_bfd_error_handler
)
1920 (_("%B: invalid link %lu for reloc section %s (index %u)"),
1921 abfd
, hdr
->sh_link
, name
, shindex
));
1922 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1925 /* For some incomprehensible reason Oracle distributes
1926 libraries for Solaris in which some of the objects have
1927 bogus sh_link fields. It would be nice if we could just
1928 reject them, but, unfortunately, some people need to use
1929 them. We scan through the section headers; if we find only
1930 one suitable symbol table, we clobber the sh_link to point
1931 to it. I hope this doesn't break anything. */
1932 if (elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_SYMTAB
1933 && elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_DYNSYM
)
1939 for (scan
= 1; scan
< num_sec
; scan
++)
1941 if (elf_elfsections (abfd
)[scan
]->sh_type
== SHT_SYMTAB
1942 || elf_elfsections (abfd
)[scan
]->sh_type
== SHT_DYNSYM
)
1953 hdr
->sh_link
= found
;
1956 /* Get the symbol table. */
1957 if (elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
== SHT_SYMTAB
1958 && ! bfd_section_from_shdr (abfd
, hdr
->sh_link
))
1961 /* If this reloc section does not use the main symbol table we
1962 don't treat it as a reloc section. BFD can't adequately
1963 represent such a section, so at least for now, we don't
1964 try. We just present it as a normal section. We also
1965 can't use it as a reloc section if it points to the null
1967 if (hdr
->sh_link
!= elf_onesymtab (abfd
) || hdr
->sh_info
== SHN_UNDEF
)
1968 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1970 if (! bfd_section_from_shdr (abfd
, hdr
->sh_info
))
1972 target_sect
= bfd_section_from_elf_index (abfd
, hdr
->sh_info
);
1973 if (target_sect
== NULL
)
1976 if ((target_sect
->flags
& SEC_RELOC
) == 0
1977 || target_sect
->reloc_count
== 0)
1978 hdr2
= &elf_section_data (target_sect
)->rel_hdr
;
1982 BFD_ASSERT (elf_section_data (target_sect
)->rel_hdr2
== NULL
);
1983 amt
= sizeof (*hdr2
);
1984 hdr2
= bfd_alloc (abfd
, amt
);
1985 elf_section_data (target_sect
)->rel_hdr2
= hdr2
;
1988 elf_elfsections (abfd
)[shindex
] = hdr2
;
1989 target_sect
->reloc_count
+= NUM_SHDR_ENTRIES (hdr
);
1990 target_sect
->flags
|= SEC_RELOC
;
1991 target_sect
->relocation
= NULL
;
1992 target_sect
->rel_filepos
= hdr
->sh_offset
;
1993 /* In the section to which the relocations apply, mark whether
1994 its relocations are of the REL or RELA variety. */
1995 if (hdr
->sh_size
!= 0)
1996 target_sect
->use_rela_p
= hdr
->sh_type
== SHT_RELA
;
1997 abfd
->flags
|= HAS_RELOC
;
2002 case SHT_GNU_verdef
:
2003 elf_dynverdef (abfd
) = shindex
;
2004 elf_tdata (abfd
)->dynverdef_hdr
= *hdr
;
2005 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
2008 case SHT_GNU_versym
:
2009 elf_dynversym (abfd
) = shindex
;
2010 elf_tdata (abfd
)->dynversym_hdr
= *hdr
;
2011 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
2014 case SHT_GNU_verneed
:
2015 elf_dynverref (abfd
) = shindex
;
2016 elf_tdata (abfd
)->dynverref_hdr
= *hdr
;
2017 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
2024 /* We need a BFD section for objcopy and relocatable linking,
2025 and it's handy to have the signature available as the section
2027 name
= group_signature (abfd
, hdr
);
2030 if (!_bfd_elf_make_section_from_shdr (abfd
, hdr
, name
))
2032 if (hdr
->contents
!= NULL
)
2034 Elf_Internal_Group
*idx
= (Elf_Internal_Group
*) hdr
->contents
;
2035 unsigned int n_elt
= hdr
->sh_size
/ 4;
2038 if (idx
->flags
& GRP_COMDAT
)
2039 hdr
->bfd_section
->flags
2040 |= SEC_LINK_ONCE
| SEC_LINK_DUPLICATES_DISCARD
;
2042 /* We try to keep the same section order as it comes in. */
2044 while (--n_elt
!= 0)
2045 if ((s
= (--idx
)->shdr
->bfd_section
) != NULL
2046 && elf_next_in_group (s
) != NULL
)
2048 elf_next_in_group (hdr
->bfd_section
) = s
;
2055 /* Check for any processor-specific section types. */
2057 if (bed
->elf_backend_section_from_shdr
)
2058 (*bed
->elf_backend_section_from_shdr
) (abfd
, hdr
, name
);
2066 /* Return the section for the local symbol specified by ABFD, R_SYMNDX.
2067 Return SEC for sections that have no elf section, and NULL on error. */
2070 bfd_section_from_r_symndx (bfd
*abfd
,
2071 struct sym_sec_cache
*cache
,
2073 unsigned long r_symndx
)
2075 Elf_Internal_Shdr
*symtab_hdr
;
2076 unsigned char esym
[sizeof (Elf64_External_Sym
)];
2077 Elf_External_Sym_Shndx eshndx
;
2078 Elf_Internal_Sym isym
;
2079 unsigned int ent
= r_symndx
% LOCAL_SYM_CACHE_SIZE
;
2081 if (cache
->abfd
== abfd
&& cache
->indx
[ent
] == r_symndx
)
2082 return cache
->sec
[ent
];
2084 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2085 if (bfd_elf_get_elf_syms (abfd
, symtab_hdr
, 1, r_symndx
,
2086 &isym
, esym
, &eshndx
) == NULL
)
2089 if (cache
->abfd
!= abfd
)
2091 memset (cache
->indx
, -1, sizeof (cache
->indx
));
2094 cache
->indx
[ent
] = r_symndx
;
2095 cache
->sec
[ent
] = sec
;
2096 if ((isym
.st_shndx
!= SHN_UNDEF
&& isym
.st_shndx
< SHN_LORESERVE
)
2097 || isym
.st_shndx
> SHN_HIRESERVE
)
2100 s
= bfd_section_from_elf_index (abfd
, isym
.st_shndx
);
2102 cache
->sec
[ent
] = s
;
2104 return cache
->sec
[ent
];
2107 /* Given an ELF section number, retrieve the corresponding BFD
2111 bfd_section_from_elf_index (bfd
*abfd
, unsigned int index
)
2113 if (index
>= elf_numsections (abfd
))
2115 return elf_elfsections (abfd
)[index
]->bfd_section
;
2118 static struct bfd_elf_special_section
const special_sections
[] =
2120 { ".bss", 4, -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
},
2121 { ".gnu.linkonce.b",15, -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
},
2122 { ".comment", 8, 0, SHT_PROGBITS
, 0 },
2123 { ".data", 5, -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
},
2124 { ".data1", 6, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
},
2125 { ".debug", 6, 0, SHT_PROGBITS
, 0 },
2126 { ".fini", 5, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
},
2127 { ".init", 5, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
},
2128 { ".line", 5, 0, SHT_PROGBITS
, 0 },
2129 { ".rodata", 7, -2, SHT_PROGBITS
, SHF_ALLOC
},
2130 { ".rodata1", 8, 0, SHT_PROGBITS
, SHF_ALLOC
},
2131 { ".tbss", 5, -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_TLS
},
2132 { ".tdata", 6, -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_TLS
},
2133 { ".text", 5, -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
},
2134 { ".init_array", 11, 0, SHT_INIT_ARRAY
, SHF_ALLOC
+ SHF_WRITE
},
2135 { ".fini_array", 11, 0, SHT_FINI_ARRAY
, SHF_ALLOC
+ SHF_WRITE
},
2136 { ".preinit_array", 14, 0, SHT_PREINIT_ARRAY
, SHF_ALLOC
+ SHF_WRITE
},
2137 { ".debug_line", 11, 0, SHT_PROGBITS
, 0 },
2138 { ".debug_info", 11, 0, SHT_PROGBITS
, 0 },
2139 { ".debug_abbrev", 13, 0, SHT_PROGBITS
, 0 },
2140 { ".debug_aranges", 14, 0, SHT_PROGBITS
, 0 },
2141 { ".dynamic", 8, 0, SHT_DYNAMIC
, SHF_ALLOC
},
2142 { ".dynstr", 7, 0, SHT_STRTAB
, SHF_ALLOC
},
2143 { ".dynsym", 7, 0, SHT_DYNSYM
, SHF_ALLOC
},
2144 { ".got", 4, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
},
2145 { ".hash", 5, 0, SHT_HASH
, SHF_ALLOC
},
2146 { ".interp", 7, 0, SHT_PROGBITS
, 0 },
2147 { ".plt", 4, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
},
2148 { ".shstrtab", 9, 0, SHT_STRTAB
, 0 },
2149 { ".strtab", 7, 0, SHT_STRTAB
, 0 },
2150 { ".symtab", 7, 0, SHT_SYMTAB
, 0 },
2151 { ".gnu.version", 12, 0, SHT_GNU_versym
, 0 },
2152 { ".gnu.version_d", 14, 0, SHT_GNU_verdef
, 0 },
2153 { ".gnu.version_r", 14, 0, SHT_GNU_verneed
, 0 },
2154 { ".note.GNU-stack",15, 0, SHT_PROGBITS
, 0 },
2155 { ".note", 5, -1, SHT_NOTE
, 0 },
2156 { ".rela", 5, -1, SHT_RELA
, 0 },
2157 { ".rel", 4, -1, SHT_REL
, 0 },
2158 { ".stabstr", 5, 3, SHT_STRTAB
, 0 },
2159 { NULL
, 0, 0, 0, 0 }
2162 static const struct bfd_elf_special_section
*
2163 get_special_section (const char *name
,
2164 const struct bfd_elf_special_section
*special_sections
,
2168 int len
= strlen (name
);
2170 for (i
= 0; special_sections
[i
].prefix
!= NULL
; i
++)
2173 int prefix_len
= special_sections
[i
].prefix_length
;
2175 if (len
< prefix_len
)
2177 if (memcmp (name
, special_sections
[i
].prefix
, prefix_len
) != 0)
2180 suffix_len
= special_sections
[i
].suffix_length
;
2181 if (suffix_len
<= 0)
2183 if (name
[prefix_len
] != 0)
2185 if (suffix_len
== 0)
2187 if (name
[prefix_len
] != '.'
2188 && (suffix_len
== -2
2189 || (rela
&& special_sections
[i
].type
== SHT_REL
)))
2195 if (len
< prefix_len
+ suffix_len
)
2197 if (memcmp (name
+ len
- suffix_len
,
2198 special_sections
[i
].prefix
+ prefix_len
,
2202 return &special_sections
[i
];
2208 const struct bfd_elf_special_section
*
2209 _bfd_elf_get_sec_type_attr (bfd
*abfd
, const char *name
)
2211 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2212 const struct bfd_elf_special_section
*ssect
= NULL
;
2214 /* See if this is one of the special sections. */
2217 unsigned int rela
= bed
->default_use_rela_p
;
2219 if (bed
->special_sections
)
2220 ssect
= get_special_section (name
, bed
->special_sections
, rela
);
2223 ssect
= get_special_section (name
, special_sections
, rela
);
2230 _bfd_elf_new_section_hook (bfd
*abfd
, asection
*sec
)
2232 struct bfd_elf_section_data
*sdata
;
2233 const struct bfd_elf_special_section
*ssect
;
2235 sdata
= (struct bfd_elf_section_data
*) sec
->used_by_bfd
;
2238 sdata
= bfd_zalloc (abfd
, sizeof (*sdata
));
2241 sec
->used_by_bfd
= sdata
;
2244 elf_section_type (sec
) = SHT_NULL
;
2245 ssect
= _bfd_elf_get_sec_type_attr (abfd
, sec
->name
);
2248 elf_section_type (sec
) = ssect
->type
;
2249 elf_section_flags (sec
) = ssect
->attr
;
2252 /* Indicate whether or not this section should use RELA relocations. */
2253 sec
->use_rela_p
= get_elf_backend_data (abfd
)->default_use_rela_p
;
2258 /* Create a new bfd section from an ELF program header.
2260 Since program segments have no names, we generate a synthetic name
2261 of the form segment<NUM>, where NUM is generally the index in the
2262 program header table. For segments that are split (see below) we
2263 generate the names segment<NUM>a and segment<NUM>b.
2265 Note that some program segments may have a file size that is different than
2266 (less than) the memory size. All this means is that at execution the
2267 system must allocate the amount of memory specified by the memory size,
2268 but only initialize it with the first "file size" bytes read from the
2269 file. This would occur for example, with program segments consisting
2270 of combined data+bss.
2272 To handle the above situation, this routine generates TWO bfd sections
2273 for the single program segment. The first has the length specified by
2274 the file size of the segment, and the second has the length specified
2275 by the difference between the two sizes. In effect, the segment is split
2276 into it's initialized and uninitialized parts.
2281 _bfd_elf_make_section_from_phdr (bfd
*abfd
,
2282 Elf_Internal_Phdr
*hdr
,
2284 const char *typename
)
2292 split
= ((hdr
->p_memsz
> 0)
2293 && (hdr
->p_filesz
> 0)
2294 && (hdr
->p_memsz
> hdr
->p_filesz
));
2295 sprintf (namebuf
, "%s%d%s", typename
, index
, split
? "a" : "");
2296 len
= strlen (namebuf
) + 1;
2297 name
= bfd_alloc (abfd
, len
);
2300 memcpy (name
, namebuf
, len
);
2301 newsect
= bfd_make_section (abfd
, name
);
2302 if (newsect
== NULL
)
2304 newsect
->vma
= hdr
->p_vaddr
;
2305 newsect
->lma
= hdr
->p_paddr
;
2306 newsect
->size
= hdr
->p_filesz
;
2307 newsect
->filepos
= hdr
->p_offset
;
2308 newsect
->flags
|= SEC_HAS_CONTENTS
;
2309 newsect
->alignment_power
= bfd_log2 (hdr
->p_align
);
2310 if (hdr
->p_type
== PT_LOAD
)
2312 newsect
->flags
|= SEC_ALLOC
;
2313 newsect
->flags
|= SEC_LOAD
;
2314 if (hdr
->p_flags
& PF_X
)
2316 /* FIXME: all we known is that it has execute PERMISSION,
2318 newsect
->flags
|= SEC_CODE
;
2321 if (!(hdr
->p_flags
& PF_W
))
2323 newsect
->flags
|= SEC_READONLY
;
2328 sprintf (namebuf
, "%s%db", typename
, index
);
2329 len
= strlen (namebuf
) + 1;
2330 name
= bfd_alloc (abfd
, len
);
2333 memcpy (name
, namebuf
, len
);
2334 newsect
= bfd_make_section (abfd
, name
);
2335 if (newsect
== NULL
)
2337 newsect
->vma
= hdr
->p_vaddr
+ hdr
->p_filesz
;
2338 newsect
->lma
= hdr
->p_paddr
+ hdr
->p_filesz
;
2339 newsect
->size
= hdr
->p_memsz
- hdr
->p_filesz
;
2340 if (hdr
->p_type
== PT_LOAD
)
2342 newsect
->flags
|= SEC_ALLOC
;
2343 if (hdr
->p_flags
& PF_X
)
2344 newsect
->flags
|= SEC_CODE
;
2346 if (!(hdr
->p_flags
& PF_W
))
2347 newsect
->flags
|= SEC_READONLY
;
2354 bfd_section_from_phdr (bfd
*abfd
, Elf_Internal_Phdr
*hdr
, int index
)
2356 const struct elf_backend_data
*bed
;
2358 switch (hdr
->p_type
)
2361 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "null");
2364 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "load");
2367 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "dynamic");
2370 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "interp");
2373 if (! _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "note"))
2375 if (! elfcore_read_notes (abfd
, hdr
->p_offset
, hdr
->p_filesz
))
2380 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "shlib");
2383 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "phdr");
2385 case PT_GNU_EH_FRAME
:
2386 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
,
2390 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "stack");
2393 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "relro");
2396 /* Check for any processor-specific program segment types.
2397 If no handler for them, default to making "segment" sections. */
2398 bed
= get_elf_backend_data (abfd
);
2399 if (bed
->elf_backend_section_from_phdr
)
2400 return (*bed
->elf_backend_section_from_phdr
) (abfd
, hdr
, index
);
2402 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "segment");
2406 /* Initialize REL_HDR, the section-header for new section, containing
2407 relocations against ASECT. If USE_RELA_P is TRUE, we use RELA
2408 relocations; otherwise, we use REL relocations. */
2411 _bfd_elf_init_reloc_shdr (bfd
*abfd
,
2412 Elf_Internal_Shdr
*rel_hdr
,
2414 bfd_boolean use_rela_p
)
2417 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2418 bfd_size_type amt
= sizeof ".rela" + strlen (asect
->name
);
2420 name
= bfd_alloc (abfd
, amt
);
2423 sprintf (name
, "%s%s", use_rela_p
? ".rela" : ".rel", asect
->name
);
2425 (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd
), name
,
2427 if (rel_hdr
->sh_name
== (unsigned int) -1)
2429 rel_hdr
->sh_type
= use_rela_p
? SHT_RELA
: SHT_REL
;
2430 rel_hdr
->sh_entsize
= (use_rela_p
2431 ? bed
->s
->sizeof_rela
2432 : bed
->s
->sizeof_rel
);
2433 rel_hdr
->sh_addralign
= 1 << bed
->s
->log_file_align
;
2434 rel_hdr
->sh_flags
= 0;
2435 rel_hdr
->sh_addr
= 0;
2436 rel_hdr
->sh_size
= 0;
2437 rel_hdr
->sh_offset
= 0;
2442 /* Set up an ELF internal section header for a section. */
2445 elf_fake_sections (bfd
*abfd
, asection
*asect
, void *failedptrarg
)
2447 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2448 bfd_boolean
*failedptr
= failedptrarg
;
2449 Elf_Internal_Shdr
*this_hdr
;
2453 /* We already failed; just get out of the bfd_map_over_sections
2458 this_hdr
= &elf_section_data (asect
)->this_hdr
;
2460 this_hdr
->sh_name
= (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd
),
2461 asect
->name
, FALSE
);
2462 if (this_hdr
->sh_name
== (unsigned int) -1)
2468 this_hdr
->sh_flags
= 0;
2470 if ((asect
->flags
& SEC_ALLOC
) != 0
2471 || asect
->user_set_vma
)
2472 this_hdr
->sh_addr
= asect
->vma
;
2474 this_hdr
->sh_addr
= 0;
2476 this_hdr
->sh_offset
= 0;
2477 this_hdr
->sh_size
= asect
->size
;
2478 this_hdr
->sh_link
= 0;
2479 this_hdr
->sh_addralign
= 1 << asect
->alignment_power
;
2480 /* The sh_entsize and sh_info fields may have been set already by
2481 copy_private_section_data. */
2483 this_hdr
->bfd_section
= asect
;
2484 this_hdr
->contents
= NULL
;
2486 /* If the section type is unspecified, we set it based on
2488 if (this_hdr
->sh_type
== SHT_NULL
)
2490 if ((asect
->flags
& SEC_GROUP
) != 0)
2492 /* We also need to mark SHF_GROUP here for relocatable
2494 struct bfd_link_order
*l
;
2497 for (l
= asect
->link_order_head
; l
!= NULL
; l
= l
->next
)
2498 if (l
->type
== bfd_indirect_link_order
2499 && (elt
= elf_next_in_group (l
->u
.indirect
.section
)) != NULL
)
2502 /* The name is not important. Anything will do. */
2503 elf_group_name (elt
->output_section
) = "G";
2504 elf_section_flags (elt
->output_section
) |= SHF_GROUP
;
2506 elt
= elf_next_in_group (elt
);
2507 /* During a relocatable link, the lists are
2510 while (elt
!= elf_next_in_group (l
->u
.indirect
.section
));
2512 this_hdr
->sh_type
= SHT_GROUP
;
2514 else if ((asect
->flags
& SEC_ALLOC
) != 0
2515 && (((asect
->flags
& (SEC_LOAD
| SEC_HAS_CONTENTS
)) == 0)
2516 || (asect
->flags
& SEC_NEVER_LOAD
) != 0))
2517 this_hdr
->sh_type
= SHT_NOBITS
;
2519 this_hdr
->sh_type
= SHT_PROGBITS
;
2522 switch (this_hdr
->sh_type
)
2528 case SHT_INIT_ARRAY
:
2529 case SHT_FINI_ARRAY
:
2530 case SHT_PREINIT_ARRAY
:
2537 this_hdr
->sh_entsize
= bed
->s
->sizeof_hash_entry
;
2541 this_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
2545 this_hdr
->sh_entsize
= bed
->s
->sizeof_dyn
;
2549 if (get_elf_backend_data (abfd
)->may_use_rela_p
)
2550 this_hdr
->sh_entsize
= bed
->s
->sizeof_rela
;
2554 if (get_elf_backend_data (abfd
)->may_use_rel_p
)
2555 this_hdr
->sh_entsize
= bed
->s
->sizeof_rel
;
2558 case SHT_GNU_versym
:
2559 this_hdr
->sh_entsize
= sizeof (Elf_External_Versym
);
2562 case SHT_GNU_verdef
:
2563 this_hdr
->sh_entsize
= 0;
2564 /* objcopy or strip will copy over sh_info, but may not set
2565 cverdefs. The linker will set cverdefs, but sh_info will be
2567 if (this_hdr
->sh_info
== 0)
2568 this_hdr
->sh_info
= elf_tdata (abfd
)->cverdefs
;
2570 BFD_ASSERT (elf_tdata (abfd
)->cverdefs
== 0
2571 || this_hdr
->sh_info
== elf_tdata (abfd
)->cverdefs
);
2574 case SHT_GNU_verneed
:
2575 this_hdr
->sh_entsize
= 0;
2576 /* objcopy or strip will copy over sh_info, but may not set
2577 cverrefs. The linker will set cverrefs, but sh_info will be
2579 if (this_hdr
->sh_info
== 0)
2580 this_hdr
->sh_info
= elf_tdata (abfd
)->cverrefs
;
2582 BFD_ASSERT (elf_tdata (abfd
)->cverrefs
== 0
2583 || this_hdr
->sh_info
== elf_tdata (abfd
)->cverrefs
);
2587 this_hdr
->sh_entsize
= 4;
2591 if ((asect
->flags
& SEC_ALLOC
) != 0)
2592 this_hdr
->sh_flags
|= SHF_ALLOC
;
2593 if ((asect
->flags
& SEC_READONLY
) == 0)
2594 this_hdr
->sh_flags
|= SHF_WRITE
;
2595 if ((asect
->flags
& SEC_CODE
) != 0)
2596 this_hdr
->sh_flags
|= SHF_EXECINSTR
;
2597 if ((asect
->flags
& SEC_MERGE
) != 0)
2599 this_hdr
->sh_flags
|= SHF_MERGE
;
2600 this_hdr
->sh_entsize
= asect
->entsize
;
2601 if ((asect
->flags
& SEC_STRINGS
) != 0)
2602 this_hdr
->sh_flags
|= SHF_STRINGS
;
2604 if ((asect
->flags
& SEC_GROUP
) == 0 && elf_group_name (asect
) != NULL
)
2605 this_hdr
->sh_flags
|= SHF_GROUP
;
2606 if ((asect
->flags
& SEC_THREAD_LOCAL
) != 0)
2608 this_hdr
->sh_flags
|= SHF_TLS
;
2609 if (asect
->size
== 0 && (asect
->flags
& SEC_HAS_CONTENTS
) == 0)
2611 struct bfd_link_order
*o
;
2613 this_hdr
->sh_size
= 0;
2614 for (o
= asect
->link_order_head
; o
!= NULL
; o
= o
->next
)
2615 if (this_hdr
->sh_size
< o
->offset
+ o
->size
)
2616 this_hdr
->sh_size
= o
->offset
+ o
->size
;
2617 if (this_hdr
->sh_size
)
2618 this_hdr
->sh_type
= SHT_NOBITS
;
2622 /* Check for processor-specific section types. */
2623 if (bed
->elf_backend_fake_sections
2624 && !(*bed
->elf_backend_fake_sections
) (abfd
, this_hdr
, asect
))
2627 /* If the section has relocs, set up a section header for the
2628 SHT_REL[A] section. If two relocation sections are required for
2629 this section, it is up to the processor-specific back-end to
2630 create the other. */
2631 if ((asect
->flags
& SEC_RELOC
) != 0
2632 && !_bfd_elf_init_reloc_shdr (abfd
,
2633 &elf_section_data (asect
)->rel_hdr
,
2639 /* Fill in the contents of a SHT_GROUP section. */
2642 bfd_elf_set_group_contents (bfd
*abfd
, asection
*sec
, void *failedptrarg
)
2644 bfd_boolean
*failedptr
= failedptrarg
;
2645 unsigned long symindx
;
2646 asection
*elt
, *first
;
2648 struct bfd_link_order
*l
;
2651 if (elf_section_data (sec
)->this_hdr
.sh_type
!= SHT_GROUP
2656 if (elf_group_id (sec
) != NULL
)
2657 symindx
= elf_group_id (sec
)->udata
.i
;
2661 /* If called from the assembler, swap_out_syms will have set up
2662 elf_section_syms; If called for "ld -r", use target_index. */
2663 if (elf_section_syms (abfd
) != NULL
)
2664 symindx
= elf_section_syms (abfd
)[sec
->index
]->udata
.i
;
2666 symindx
= sec
->target_index
;
2668 elf_section_data (sec
)->this_hdr
.sh_info
= symindx
;
2670 /* The contents won't be allocated for "ld -r" or objcopy. */
2672 if (sec
->contents
== NULL
)
2675 sec
->contents
= bfd_alloc (abfd
, sec
->size
);
2677 /* Arrange for the section to be written out. */
2678 elf_section_data (sec
)->this_hdr
.contents
= sec
->contents
;
2679 if (sec
->contents
== NULL
)
2686 loc
= sec
->contents
+ sec
->size
;
2688 /* Get the pointer to the first section in the group that gas
2689 squirreled away here. objcopy arranges for this to be set to the
2690 start of the input section group. */
2691 first
= elt
= elf_next_in_group (sec
);
2693 /* First element is a flag word. Rest of section is elf section
2694 indices for all the sections of the group. Write them backwards
2695 just to keep the group in the same order as given in .section
2696 directives, not that it matters. */
2705 s
= s
->output_section
;
2708 idx
= elf_section_data (s
)->this_idx
;
2709 H_PUT_32 (abfd
, idx
, loc
);
2710 elt
= elf_next_in_group (elt
);
2715 /* If this is a relocatable link, then the above did nothing because
2716 SEC is the output section. Look through the input sections
2718 for (l
= sec
->link_order_head
; l
!= NULL
; l
= l
->next
)
2719 if (l
->type
== bfd_indirect_link_order
2720 && (elt
= elf_next_in_group (l
->u
.indirect
.section
)) != NULL
)
2725 elf_section_data (elt
->output_section
)->this_idx
, loc
);
2726 elt
= elf_next_in_group (elt
);
2727 /* During a relocatable link, the lists are circular. */
2729 while (elt
!= elf_next_in_group (l
->u
.indirect
.section
));
2731 if ((loc
-= 4) != sec
->contents
)
2734 H_PUT_32 (abfd
, sec
->flags
& SEC_LINK_ONCE
? GRP_COMDAT
: 0, loc
);
2737 /* Assign all ELF section numbers. The dummy first section is handled here
2738 too. The link/info pointers for the standard section types are filled
2739 in here too, while we're at it. */
2742 assign_section_numbers (bfd
*abfd
)
2744 struct elf_obj_tdata
*t
= elf_tdata (abfd
);
2746 unsigned int section_number
, secn
;
2747 Elf_Internal_Shdr
**i_shdrp
;
2752 _bfd_elf_strtab_clear_all_refs (elf_shstrtab (abfd
));
2754 for (sec
= abfd
->sections
; sec
; sec
= sec
->next
)
2756 struct bfd_elf_section_data
*d
= elf_section_data (sec
);
2758 if (section_number
== SHN_LORESERVE
)
2759 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2760 d
->this_idx
= section_number
++;
2761 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->this_hdr
.sh_name
);
2762 if ((sec
->flags
& SEC_RELOC
) == 0)
2766 if (section_number
== SHN_LORESERVE
)
2767 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2768 d
->rel_idx
= section_number
++;
2769 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->rel_hdr
.sh_name
);
2774 if (section_number
== SHN_LORESERVE
)
2775 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2776 d
->rel_idx2
= section_number
++;
2777 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->rel_hdr2
->sh_name
);
2783 if (section_number
== SHN_LORESERVE
)
2784 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2785 t
->shstrtab_section
= section_number
++;
2786 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->shstrtab_hdr
.sh_name
);
2787 elf_elfheader (abfd
)->e_shstrndx
= t
->shstrtab_section
;
2789 if (bfd_get_symcount (abfd
) > 0)
2791 if (section_number
== SHN_LORESERVE
)
2792 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2793 t
->symtab_section
= section_number
++;
2794 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->symtab_hdr
.sh_name
);
2795 if (section_number
> SHN_LORESERVE
- 2)
2797 if (section_number
== SHN_LORESERVE
)
2798 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2799 t
->symtab_shndx_section
= section_number
++;
2800 t
->symtab_shndx_hdr
.sh_name
2801 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd
),
2802 ".symtab_shndx", FALSE
);
2803 if (t
->symtab_shndx_hdr
.sh_name
== (unsigned int) -1)
2806 if (section_number
== SHN_LORESERVE
)
2807 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2808 t
->strtab_section
= section_number
++;
2809 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->strtab_hdr
.sh_name
);
2812 _bfd_elf_strtab_finalize (elf_shstrtab (abfd
));
2813 t
->shstrtab_hdr
.sh_size
= _bfd_elf_strtab_size (elf_shstrtab (abfd
));
2815 elf_numsections (abfd
) = section_number
;
2816 elf_elfheader (abfd
)->e_shnum
= section_number
;
2817 if (section_number
> SHN_LORESERVE
)
2818 elf_elfheader (abfd
)->e_shnum
-= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2820 /* Set up the list of section header pointers, in agreement with the
2822 amt
= section_number
* sizeof (Elf_Internal_Shdr
*);
2823 i_shdrp
= bfd_zalloc (abfd
, amt
);
2824 if (i_shdrp
== NULL
)
2827 amt
= sizeof (Elf_Internal_Shdr
);
2828 i_shdrp
[0] = bfd_zalloc (abfd
, amt
);
2829 if (i_shdrp
[0] == NULL
)
2831 bfd_release (abfd
, i_shdrp
);
2835 elf_elfsections (abfd
) = i_shdrp
;
2837 i_shdrp
[t
->shstrtab_section
] = &t
->shstrtab_hdr
;
2838 if (bfd_get_symcount (abfd
) > 0)
2840 i_shdrp
[t
->symtab_section
] = &t
->symtab_hdr
;
2841 if (elf_numsections (abfd
) > SHN_LORESERVE
)
2843 i_shdrp
[t
->symtab_shndx_section
] = &t
->symtab_shndx_hdr
;
2844 t
->symtab_shndx_hdr
.sh_link
= t
->symtab_section
;
2846 i_shdrp
[t
->strtab_section
] = &t
->strtab_hdr
;
2847 t
->symtab_hdr
.sh_link
= t
->strtab_section
;
2850 for (sec
= abfd
->sections
; sec
; sec
= sec
->next
)
2852 struct bfd_elf_section_data
*d
= elf_section_data (sec
);
2856 i_shdrp
[d
->this_idx
] = &d
->this_hdr
;
2857 if (d
->rel_idx
!= 0)
2858 i_shdrp
[d
->rel_idx
] = &d
->rel_hdr
;
2859 if (d
->rel_idx2
!= 0)
2860 i_shdrp
[d
->rel_idx2
] = d
->rel_hdr2
;
2862 /* Fill in the sh_link and sh_info fields while we're at it. */
2864 /* sh_link of a reloc section is the section index of the symbol
2865 table. sh_info is the section index of the section to which
2866 the relocation entries apply. */
2867 if (d
->rel_idx
!= 0)
2869 d
->rel_hdr
.sh_link
= t
->symtab_section
;
2870 d
->rel_hdr
.sh_info
= d
->this_idx
;
2872 if (d
->rel_idx2
!= 0)
2874 d
->rel_hdr2
->sh_link
= t
->symtab_section
;
2875 d
->rel_hdr2
->sh_info
= d
->this_idx
;
2878 /* We need to set up sh_link for SHF_LINK_ORDER. */
2879 if ((d
->this_hdr
.sh_flags
& SHF_LINK_ORDER
) != 0)
2881 s
= elf_linked_to_section (sec
);
2883 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
2886 struct bfd_link_order
*p
;
2888 /* Find out what the corresponding section in output
2890 for (p
= sec
->link_order_head
; p
!= NULL
; p
= p
->next
)
2892 s
= p
->u
.indirect
.section
;
2893 if (p
->type
== bfd_indirect_link_order
2894 && (bfd_get_flavour (s
->owner
)
2895 == bfd_target_elf_flavour
))
2897 Elf_Internal_Shdr
** const elf_shdrp
2898 = elf_elfsections (s
->owner
);
2900 = _bfd_elf_section_from_bfd_section (s
->owner
, s
);
2901 elfsec
= elf_shdrp
[elfsec
]->sh_link
;
2903 The Intel C compiler generates SHT_IA_64_UNWIND with
2904 SHF_LINK_ORDER. But it doesn't set theh sh_link or
2905 sh_info fields. Hence we could get the situation
2906 where elfsec is 0. */
2909 const struct elf_backend_data
*bed
2910 = get_elf_backend_data (abfd
);
2911 if (bed
->link_order_error_handler
)
2912 bed
->link_order_error_handler
2913 (_("%B: warning: sh_link not set for section `%S'"),
2918 s
= elf_shdrp
[elfsec
]->bfd_section
->output_section
;
2919 BFD_ASSERT (s
!= NULL
);
2920 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
2928 switch (d
->this_hdr
.sh_type
)
2932 /* A reloc section which we are treating as a normal BFD
2933 section. sh_link is the section index of the symbol
2934 table. sh_info is the section index of the section to
2935 which the relocation entries apply. We assume that an
2936 allocated reloc section uses the dynamic symbol table.
2937 FIXME: How can we be sure? */
2938 s
= bfd_get_section_by_name (abfd
, ".dynsym");
2940 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
2942 /* We look up the section the relocs apply to by name. */
2944 if (d
->this_hdr
.sh_type
== SHT_REL
)
2948 s
= bfd_get_section_by_name (abfd
, name
);
2950 d
->this_hdr
.sh_info
= elf_section_data (s
)->this_idx
;
2954 /* We assume that a section named .stab*str is a stabs
2955 string section. We look for a section with the same name
2956 but without the trailing ``str'', and set its sh_link
2957 field to point to this section. */
2958 if (strncmp (sec
->name
, ".stab", sizeof ".stab" - 1) == 0
2959 && strcmp (sec
->name
+ strlen (sec
->name
) - 3, "str") == 0)
2964 len
= strlen (sec
->name
);
2965 alc
= bfd_malloc (len
- 2);
2968 memcpy (alc
, sec
->name
, len
- 3);
2969 alc
[len
- 3] = '\0';
2970 s
= bfd_get_section_by_name (abfd
, alc
);
2974 elf_section_data (s
)->this_hdr
.sh_link
= d
->this_idx
;
2976 /* This is a .stab section. */
2977 if (elf_section_data (s
)->this_hdr
.sh_entsize
== 0)
2978 elf_section_data (s
)->this_hdr
.sh_entsize
2979 = 4 + 2 * bfd_get_arch_size (abfd
) / 8;
2986 case SHT_GNU_verneed
:
2987 case SHT_GNU_verdef
:
2988 /* sh_link is the section header index of the string table
2989 used for the dynamic entries, or the symbol table, or the
2991 s
= bfd_get_section_by_name (abfd
, ".dynstr");
2993 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
2997 case SHT_GNU_versym
:
2998 /* sh_link is the section header index of the symbol table
2999 this hash table or version table is for. */
3000 s
= bfd_get_section_by_name (abfd
, ".dynsym");
3002 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
3006 d
->this_hdr
.sh_link
= t
->symtab_section
;
3010 for (secn
= 1; secn
< section_number
; ++secn
)
3011 if (i_shdrp
[secn
] == NULL
)
3012 i_shdrp
[secn
] = i_shdrp
[0];
3014 i_shdrp
[secn
]->sh_name
= _bfd_elf_strtab_offset (elf_shstrtab (abfd
),
3015 i_shdrp
[secn
]->sh_name
);
3019 /* Map symbol from it's internal number to the external number, moving
3020 all local symbols to be at the head of the list. */
3023 sym_is_global (bfd
*abfd
, asymbol
*sym
)
3025 /* If the backend has a special mapping, use it. */
3026 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3027 if (bed
->elf_backend_sym_is_global
)
3028 return (*bed
->elf_backend_sym_is_global
) (abfd
, sym
);
3030 return ((sym
->flags
& (BSF_GLOBAL
| BSF_WEAK
)) != 0
3031 || bfd_is_und_section (bfd_get_section (sym
))
3032 || bfd_is_com_section (bfd_get_section (sym
)));
3036 elf_map_symbols (bfd
*abfd
)
3038 unsigned int symcount
= bfd_get_symcount (abfd
);
3039 asymbol
**syms
= bfd_get_outsymbols (abfd
);
3040 asymbol
**sect_syms
;
3041 unsigned int num_locals
= 0;
3042 unsigned int num_globals
= 0;
3043 unsigned int num_locals2
= 0;
3044 unsigned int num_globals2
= 0;
3052 fprintf (stderr
, "elf_map_symbols\n");
3056 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
3058 if (max_index
< asect
->index
)
3059 max_index
= asect
->index
;
3063 amt
= max_index
* sizeof (asymbol
*);
3064 sect_syms
= bfd_zalloc (abfd
, amt
);
3065 if (sect_syms
== NULL
)
3067 elf_section_syms (abfd
) = sect_syms
;
3068 elf_num_section_syms (abfd
) = max_index
;
3070 /* Init sect_syms entries for any section symbols we have already
3071 decided to output. */
3072 for (idx
= 0; idx
< symcount
; idx
++)
3074 asymbol
*sym
= syms
[idx
];
3076 if ((sym
->flags
& BSF_SECTION_SYM
) != 0
3083 if (sec
->owner
!= NULL
)
3085 if (sec
->owner
!= abfd
)
3087 if (sec
->output_offset
!= 0)
3090 sec
= sec
->output_section
;
3092 /* Empty sections in the input files may have had a
3093 section symbol created for them. (See the comment
3094 near the end of _bfd_generic_link_output_symbols in
3095 linker.c). If the linker script discards such
3096 sections then we will reach this point. Since we know
3097 that we cannot avoid this case, we detect it and skip
3098 the abort and the assignment to the sect_syms array.
3099 To reproduce this particular case try running the
3100 linker testsuite test ld-scripts/weak.exp for an ELF
3101 port that uses the generic linker. */
3102 if (sec
->owner
== NULL
)
3105 BFD_ASSERT (sec
->owner
== abfd
);
3107 sect_syms
[sec
->index
] = syms
[idx
];
3112 /* Classify all of the symbols. */
3113 for (idx
= 0; idx
< symcount
; idx
++)
3115 if (!sym_is_global (abfd
, syms
[idx
]))
3121 /* We will be adding a section symbol for each BFD section. Most normal
3122 sections will already have a section symbol in outsymbols, but
3123 eg. SHT_GROUP sections will not, and we need the section symbol mapped
3124 at least in that case. */
3125 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
3127 if (sect_syms
[asect
->index
] == NULL
)
3129 if (!sym_is_global (abfd
, asect
->symbol
))
3136 /* Now sort the symbols so the local symbols are first. */
3137 amt
= (num_locals
+ num_globals
) * sizeof (asymbol
*);
3138 new_syms
= bfd_alloc (abfd
, amt
);
3140 if (new_syms
== NULL
)
3143 for (idx
= 0; idx
< symcount
; idx
++)
3145 asymbol
*sym
= syms
[idx
];
3148 if (!sym_is_global (abfd
, sym
))
3151 i
= num_locals
+ num_globals2
++;
3153 sym
->udata
.i
= i
+ 1;
3155 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
3157 if (sect_syms
[asect
->index
] == NULL
)
3159 asymbol
*sym
= asect
->symbol
;
3162 sect_syms
[asect
->index
] = sym
;
3163 if (!sym_is_global (abfd
, sym
))
3166 i
= num_locals
+ num_globals2
++;
3168 sym
->udata
.i
= i
+ 1;
3172 bfd_set_symtab (abfd
, new_syms
, num_locals
+ num_globals
);
3174 elf_num_locals (abfd
) = num_locals
;
3175 elf_num_globals (abfd
) = num_globals
;
3179 /* Align to the maximum file alignment that could be required for any
3180 ELF data structure. */
3182 static inline file_ptr
3183 align_file_position (file_ptr off
, int align
)
3185 return (off
+ align
- 1) & ~(align
- 1);
3188 /* Assign a file position to a section, optionally aligning to the
3189 required section alignment. */
3192 _bfd_elf_assign_file_position_for_section (Elf_Internal_Shdr
*i_shdrp
,
3200 al
= i_shdrp
->sh_addralign
;
3202 offset
= BFD_ALIGN (offset
, al
);
3204 i_shdrp
->sh_offset
= offset
;
3205 if (i_shdrp
->bfd_section
!= NULL
)
3206 i_shdrp
->bfd_section
->filepos
= offset
;
3207 if (i_shdrp
->sh_type
!= SHT_NOBITS
)
3208 offset
+= i_shdrp
->sh_size
;
3212 /* Compute the file positions we are going to put the sections at, and
3213 otherwise prepare to begin writing out the ELF file. If LINK_INFO
3214 is not NULL, this is being called by the ELF backend linker. */
3217 _bfd_elf_compute_section_file_positions (bfd
*abfd
,
3218 struct bfd_link_info
*link_info
)
3220 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3222 struct bfd_strtab_hash
*strtab
;
3223 Elf_Internal_Shdr
*shstrtab_hdr
;
3225 if (abfd
->output_has_begun
)
3228 /* Do any elf backend specific processing first. */
3229 if (bed
->elf_backend_begin_write_processing
)
3230 (*bed
->elf_backend_begin_write_processing
) (abfd
, link_info
);
3232 if (! prep_headers (abfd
))
3235 /* Post process the headers if necessary. */
3236 if (bed
->elf_backend_post_process_headers
)
3237 (*bed
->elf_backend_post_process_headers
) (abfd
, link_info
);
3240 bfd_map_over_sections (abfd
, elf_fake_sections
, &failed
);
3244 if (!assign_section_numbers (abfd
))
3247 /* The backend linker builds symbol table information itself. */
3248 if (link_info
== NULL
&& bfd_get_symcount (abfd
) > 0)
3250 /* Non-zero if doing a relocatable link. */
3251 int relocatable_p
= ! (abfd
->flags
& (EXEC_P
| DYNAMIC
));
3253 if (! swap_out_syms (abfd
, &strtab
, relocatable_p
))
3257 if (link_info
== NULL
)
3259 bfd_map_over_sections (abfd
, bfd_elf_set_group_contents
, &failed
);
3264 shstrtab_hdr
= &elf_tdata (abfd
)->shstrtab_hdr
;
3265 /* sh_name was set in prep_headers. */
3266 shstrtab_hdr
->sh_type
= SHT_STRTAB
;
3267 shstrtab_hdr
->sh_flags
= 0;
3268 shstrtab_hdr
->sh_addr
= 0;
3269 shstrtab_hdr
->sh_size
= _bfd_elf_strtab_size (elf_shstrtab (abfd
));
3270 shstrtab_hdr
->sh_entsize
= 0;
3271 shstrtab_hdr
->sh_link
= 0;
3272 shstrtab_hdr
->sh_info
= 0;
3273 /* sh_offset is set in assign_file_positions_except_relocs. */
3274 shstrtab_hdr
->sh_addralign
= 1;
3276 if (!assign_file_positions_except_relocs (abfd
, link_info
))
3279 if (link_info
== NULL
&& bfd_get_symcount (abfd
) > 0)
3282 Elf_Internal_Shdr
*hdr
;
3284 off
= elf_tdata (abfd
)->next_file_pos
;
3286 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
3287 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
3289 hdr
= &elf_tdata (abfd
)->symtab_shndx_hdr
;
3290 if (hdr
->sh_size
!= 0)
3291 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
3293 hdr
= &elf_tdata (abfd
)->strtab_hdr
;
3294 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
3296 elf_tdata (abfd
)->next_file_pos
= off
;
3298 /* Now that we know where the .strtab section goes, write it
3300 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
3301 || ! _bfd_stringtab_emit (abfd
, strtab
))
3303 _bfd_stringtab_free (strtab
);
3306 abfd
->output_has_begun
= TRUE
;
3311 /* Create a mapping from a set of sections to a program segment. */
3313 static struct elf_segment_map
*
3314 make_mapping (bfd
*abfd
,
3315 asection
**sections
,
3320 struct elf_segment_map
*m
;
3325 amt
= sizeof (struct elf_segment_map
);
3326 amt
+= (to
- from
- 1) * sizeof (asection
*);
3327 m
= bfd_zalloc (abfd
, amt
);
3331 m
->p_type
= PT_LOAD
;
3332 for (i
= from
, hdrpp
= sections
+ from
; i
< to
; i
++, hdrpp
++)
3333 m
->sections
[i
- from
] = *hdrpp
;
3334 m
->count
= to
- from
;
3336 if (from
== 0 && phdr
)
3338 /* Include the headers in the first PT_LOAD segment. */
3339 m
->includes_filehdr
= 1;
3340 m
->includes_phdrs
= 1;
3346 /* Create the PT_DYNAMIC segment, which includes DYNSEC. Returns NULL
3349 struct elf_segment_map
*
3350 _bfd_elf_make_dynamic_segment (bfd
*abfd
, asection
*dynsec
)
3352 struct elf_segment_map
*m
;
3354 m
= bfd_zalloc (abfd
, sizeof (struct elf_segment_map
));
3358 m
->p_type
= PT_DYNAMIC
;
3360 m
->sections
[0] = dynsec
;
3365 /* Set up a mapping from BFD sections to program segments. */
3368 map_sections_to_segments (bfd
*abfd
)
3370 asection
**sections
= NULL
;
3374 struct elf_segment_map
*mfirst
;
3375 struct elf_segment_map
**pm
;
3376 struct elf_segment_map
*m
;
3379 unsigned int phdr_index
;
3380 bfd_vma maxpagesize
;
3382 bfd_boolean phdr_in_segment
= TRUE
;
3383 bfd_boolean writable
;
3385 asection
*first_tls
= NULL
;
3386 asection
*dynsec
, *eh_frame_hdr
;
3389 if (elf_tdata (abfd
)->segment_map
!= NULL
)
3392 if (bfd_count_sections (abfd
) == 0)
3395 /* Select the allocated sections, and sort them. */
3397 amt
= bfd_count_sections (abfd
) * sizeof (asection
*);
3398 sections
= bfd_malloc (amt
);
3399 if (sections
== NULL
)
3403 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
3405 if ((s
->flags
& SEC_ALLOC
) != 0)
3411 BFD_ASSERT (i
<= bfd_count_sections (abfd
));
3414 qsort (sections
, (size_t) count
, sizeof (asection
*), elf_sort_sections
);
3416 /* Build the mapping. */
3421 /* If we have a .interp section, then create a PT_PHDR segment for
3422 the program headers and a PT_INTERP segment for the .interp
3424 s
= bfd_get_section_by_name (abfd
, ".interp");
3425 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0)
3427 amt
= sizeof (struct elf_segment_map
);
3428 m
= bfd_zalloc (abfd
, amt
);
3432 m
->p_type
= PT_PHDR
;
3433 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
3434 m
->p_flags
= PF_R
| PF_X
;
3435 m
->p_flags_valid
= 1;
3436 m
->includes_phdrs
= 1;
3441 amt
= sizeof (struct elf_segment_map
);
3442 m
= bfd_zalloc (abfd
, amt
);
3446 m
->p_type
= PT_INTERP
;
3454 /* Look through the sections. We put sections in the same program
3455 segment when the start of the second section can be placed within
3456 a few bytes of the end of the first section. */
3460 maxpagesize
= get_elf_backend_data (abfd
)->maxpagesize
;
3462 dynsec
= bfd_get_section_by_name (abfd
, ".dynamic");
3464 && (dynsec
->flags
& SEC_LOAD
) == 0)
3467 /* Deal with -Ttext or something similar such that the first section
3468 is not adjacent to the program headers. This is an
3469 approximation, since at this point we don't know exactly how many
3470 program headers we will need. */
3473 bfd_size_type phdr_size
;
3475 phdr_size
= elf_tdata (abfd
)->program_header_size
;
3477 phdr_size
= get_elf_backend_data (abfd
)->s
->sizeof_phdr
;
3478 if ((abfd
->flags
& D_PAGED
) == 0
3479 || sections
[0]->lma
< phdr_size
3480 || sections
[0]->lma
% maxpagesize
< phdr_size
% maxpagesize
)
3481 phdr_in_segment
= FALSE
;
3484 for (i
= 0, hdrpp
= sections
; i
< count
; i
++, hdrpp
++)
3487 bfd_boolean new_segment
;
3491 /* See if this section and the last one will fit in the same
3494 if (last_hdr
== NULL
)
3496 /* If we don't have a segment yet, then we don't need a new
3497 one (we build the last one after this loop). */
3498 new_segment
= FALSE
;
3500 else if (last_hdr
->lma
- last_hdr
->vma
!= hdr
->lma
- hdr
->vma
)
3502 /* If this section has a different relation between the
3503 virtual address and the load address, then we need a new
3507 else if (BFD_ALIGN (last_hdr
->lma
+ last_size
, maxpagesize
)
3508 < BFD_ALIGN (hdr
->lma
, maxpagesize
))
3510 /* If putting this section in this segment would force us to
3511 skip a page in the segment, then we need a new segment. */
3514 else if ((last_hdr
->flags
& (SEC_LOAD
| SEC_THREAD_LOCAL
)) == 0
3515 && (hdr
->flags
& (SEC_LOAD
| SEC_THREAD_LOCAL
)) != 0)
3517 /* We don't want to put a loadable section after a
3518 nonloadable section in the same segment.
3519 Consider .tbss sections as loadable for this purpose. */
3522 else if ((abfd
->flags
& D_PAGED
) == 0)
3524 /* If the file is not demand paged, which means that we
3525 don't require the sections to be correctly aligned in the
3526 file, then there is no other reason for a new segment. */
3527 new_segment
= FALSE
;
3530 && (hdr
->flags
& SEC_READONLY
) == 0
3531 && (((last_hdr
->lma
+ last_size
- 1)
3532 & ~(maxpagesize
- 1))
3533 != (hdr
->lma
& ~(maxpagesize
- 1))))
3535 /* We don't want to put a writable section in a read only
3536 segment, unless they are on the same page in memory
3537 anyhow. We already know that the last section does not
3538 bring us past the current section on the page, so the
3539 only case in which the new section is not on the same
3540 page as the previous section is when the previous section
3541 ends precisely on a page boundary. */
3546 /* Otherwise, we can use the same segment. */
3547 new_segment
= FALSE
;
3552 if ((hdr
->flags
& SEC_READONLY
) == 0)
3555 /* .tbss sections effectively have zero size. */
3556 if ((hdr
->flags
& (SEC_THREAD_LOCAL
| SEC_LOAD
)) != SEC_THREAD_LOCAL
)
3557 last_size
= hdr
->size
;
3563 /* We need a new program segment. We must create a new program
3564 header holding all the sections from phdr_index until hdr. */
3566 m
= make_mapping (abfd
, sections
, phdr_index
, i
, phdr_in_segment
);
3573 if ((hdr
->flags
& SEC_READONLY
) == 0)
3579 /* .tbss sections effectively have zero size. */
3580 if ((hdr
->flags
& (SEC_THREAD_LOCAL
| SEC_LOAD
)) != SEC_THREAD_LOCAL
)
3581 last_size
= hdr
->size
;
3585 phdr_in_segment
= FALSE
;
3588 /* Create a final PT_LOAD program segment. */
3589 if (last_hdr
!= NULL
)
3591 m
= make_mapping (abfd
, sections
, phdr_index
, i
, phdr_in_segment
);
3599 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
3602 m
= _bfd_elf_make_dynamic_segment (abfd
, dynsec
);
3609 /* For each loadable .note section, add a PT_NOTE segment. We don't
3610 use bfd_get_section_by_name, because if we link together
3611 nonloadable .note sections and loadable .note sections, we will
3612 generate two .note sections in the output file. FIXME: Using
3613 names for section types is bogus anyhow. */
3614 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
3616 if ((s
->flags
& SEC_LOAD
) != 0
3617 && strncmp (s
->name
, ".note", 5) == 0)
3619 amt
= sizeof (struct elf_segment_map
);
3620 m
= bfd_zalloc (abfd
, amt
);
3624 m
->p_type
= PT_NOTE
;
3631 if (s
->flags
& SEC_THREAD_LOCAL
)
3639 /* If there are any SHF_TLS output sections, add PT_TLS segment. */
3644 amt
= sizeof (struct elf_segment_map
);
3645 amt
+= (tls_count
- 1) * sizeof (asection
*);
3646 m
= bfd_zalloc (abfd
, amt
);
3651 m
->count
= tls_count
;
3652 /* Mandated PF_R. */
3654 m
->p_flags_valid
= 1;
3655 for (i
= 0; i
< tls_count
; ++i
)
3657 BFD_ASSERT (first_tls
->flags
& SEC_THREAD_LOCAL
);
3658 m
->sections
[i
] = first_tls
;
3659 first_tls
= first_tls
->next
;
3666 /* If there is a .eh_frame_hdr section, throw in a PT_GNU_EH_FRAME
3668 eh_frame_hdr
= elf_tdata (abfd
)->eh_frame_hdr
;
3669 if (eh_frame_hdr
!= NULL
3670 && (eh_frame_hdr
->output_section
->flags
& SEC_LOAD
) != 0)
3672 amt
= sizeof (struct elf_segment_map
);
3673 m
= bfd_zalloc (abfd
, amt
);
3677 m
->p_type
= PT_GNU_EH_FRAME
;
3679 m
->sections
[0] = eh_frame_hdr
->output_section
;
3685 if (elf_tdata (abfd
)->stack_flags
)
3687 amt
= sizeof (struct elf_segment_map
);
3688 m
= bfd_zalloc (abfd
, amt
);
3692 m
->p_type
= PT_GNU_STACK
;
3693 m
->p_flags
= elf_tdata (abfd
)->stack_flags
;
3694 m
->p_flags_valid
= 1;
3700 if (elf_tdata (abfd
)->relro
)
3702 amt
= sizeof (struct elf_segment_map
);
3703 m
= bfd_zalloc (abfd
, amt
);
3707 m
->p_type
= PT_GNU_RELRO
;
3709 m
->p_flags_valid
= 1;
3718 elf_tdata (abfd
)->segment_map
= mfirst
;
3722 if (sections
!= NULL
)
3727 /* Sort sections by address. */
3730 elf_sort_sections (const void *arg1
, const void *arg2
)
3732 const asection
*sec1
= *(const asection
**) arg1
;
3733 const asection
*sec2
= *(const asection
**) arg2
;
3734 bfd_size_type size1
, size2
;
3736 /* Sort by LMA first, since this is the address used to
3737 place the section into a segment. */
3738 if (sec1
->lma
< sec2
->lma
)
3740 else if (sec1
->lma
> sec2
->lma
)
3743 /* Then sort by VMA. Normally the LMA and the VMA will be
3744 the same, and this will do nothing. */
3745 if (sec1
->vma
< sec2
->vma
)
3747 else if (sec1
->vma
> sec2
->vma
)
3750 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
3752 #define TOEND(x) (((x)->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0)
3758 /* If the indicies are the same, do not return 0
3759 here, but continue to try the next comparison. */
3760 if (sec1
->target_index
- sec2
->target_index
!= 0)
3761 return sec1
->target_index
- sec2
->target_index
;
3766 else if (TOEND (sec2
))
3771 /* Sort by size, to put zero sized sections
3772 before others at the same address. */
3774 size1
= (sec1
->flags
& SEC_LOAD
) ? sec1
->size
: 0;
3775 size2
= (sec2
->flags
& SEC_LOAD
) ? sec2
->size
: 0;
3782 return sec1
->target_index
- sec2
->target_index
;
3785 /* Ian Lance Taylor writes:
3787 We shouldn't be using % with a negative signed number. That's just
3788 not good. We have to make sure either that the number is not
3789 negative, or that the number has an unsigned type. When the types
3790 are all the same size they wind up as unsigned. When file_ptr is a
3791 larger signed type, the arithmetic winds up as signed long long,
3794 What we're trying to say here is something like ``increase OFF by
3795 the least amount that will cause it to be equal to the VMA modulo
3797 /* In other words, something like:
3799 vma_offset = m->sections[0]->vma % bed->maxpagesize;
3800 off_offset = off % bed->maxpagesize;
3801 if (vma_offset < off_offset)
3802 adjustment = vma_offset + bed->maxpagesize - off_offset;
3804 adjustment = vma_offset - off_offset;
3806 which can can be collapsed into the expression below. */
3809 vma_page_aligned_bias (bfd_vma vma
, ufile_ptr off
, bfd_vma maxpagesize
)
3811 return ((vma
- off
) % maxpagesize
);
3814 /* Assign file positions to the sections based on the mapping from
3815 sections to segments. This function also sets up some fields in
3816 the file header, and writes out the program headers. */
3819 assign_file_positions_for_segments (bfd
*abfd
, struct bfd_link_info
*link_info
)
3821 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3823 struct elf_segment_map
*m
;
3825 Elf_Internal_Phdr
*phdrs
;
3827 bfd_vma filehdr_vaddr
, filehdr_paddr
;
3828 bfd_vma phdrs_vaddr
, phdrs_paddr
;
3829 Elf_Internal_Phdr
*p
;
3832 if (elf_tdata (abfd
)->segment_map
== NULL
)
3834 if (! map_sections_to_segments (abfd
))
3839 /* The placement algorithm assumes that non allocated sections are
3840 not in PT_LOAD segments. We ensure this here by removing such
3841 sections from the segment map. */
3842 for (m
= elf_tdata (abfd
)->segment_map
;
3846 unsigned int new_count
;
3849 if (m
->p_type
!= PT_LOAD
)
3853 for (i
= 0; i
< m
->count
; i
++)
3855 if ((m
->sections
[i
]->flags
& SEC_ALLOC
) != 0)
3858 m
->sections
[new_count
] = m
->sections
[i
];
3864 if (new_count
!= m
->count
)
3865 m
->count
= new_count
;
3869 if (bed
->elf_backend_modify_segment_map
)
3871 if (! (*bed
->elf_backend_modify_segment_map
) (abfd
, link_info
))
3876 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
3879 elf_elfheader (abfd
)->e_phoff
= bed
->s
->sizeof_ehdr
;
3880 elf_elfheader (abfd
)->e_phentsize
= bed
->s
->sizeof_phdr
;
3881 elf_elfheader (abfd
)->e_phnum
= count
;
3886 /* If we already counted the number of program segments, make sure
3887 that we allocated enough space. This happens when SIZEOF_HEADERS
3888 is used in a linker script. */
3889 alloc
= elf_tdata (abfd
)->program_header_size
/ bed
->s
->sizeof_phdr
;
3890 if (alloc
!= 0 && count
> alloc
)
3892 ((*_bfd_error_handler
)
3893 (_("%s: Not enough room for program headers (allocated %u, need %u)"),
3894 bfd_get_filename (abfd
), alloc
, count
));
3895 bfd_set_error (bfd_error_bad_value
);
3902 amt
= alloc
* sizeof (Elf_Internal_Phdr
);
3903 phdrs
= bfd_alloc (abfd
, amt
);
3907 off
= bed
->s
->sizeof_ehdr
;
3908 off
+= alloc
* bed
->s
->sizeof_phdr
;
3915 for (m
= elf_tdata (abfd
)->segment_map
, p
= phdrs
;
3922 /* If elf_segment_map is not from map_sections_to_segments, the
3923 sections may not be correctly ordered. NOTE: sorting should
3924 not be done to the PT_NOTE section of a corefile, which may
3925 contain several pseudo-sections artificially created by bfd.
3926 Sorting these pseudo-sections breaks things badly. */
3928 && !(elf_elfheader (abfd
)->e_type
== ET_CORE
3929 && m
->p_type
== PT_NOTE
))
3930 qsort (m
->sections
, (size_t) m
->count
, sizeof (asection
*),
3933 p
->p_type
= m
->p_type
;
3934 p
->p_flags
= m
->p_flags
;
3936 if (p
->p_type
== PT_LOAD
3938 && (m
->sections
[0]->flags
& SEC_ALLOC
) != 0)
3940 if ((abfd
->flags
& D_PAGED
) != 0)
3941 off
+= vma_page_aligned_bias (m
->sections
[0]->vma
, off
,
3945 bfd_size_type align
;
3948 for (i
= 0, secpp
= m
->sections
; i
< m
->count
; i
++, secpp
++)
3950 bfd_size_type secalign
;
3952 secalign
= bfd_get_section_alignment (abfd
, *secpp
);
3953 if (secalign
> align
)
3957 off
+= vma_page_aligned_bias (m
->sections
[0]->vma
, off
,
3961 /* Make sure the .dynamic section is the first section in the
3962 PT_DYNAMIC segment. */
3963 else if (p
->p_type
== PT_DYNAMIC
3965 && strcmp (m
->sections
[0]->name
, ".dynamic") != 0)
3968 (_("%s: The first section in the PT_DYNAMIC segment is not the .dynamic section"),
3969 bfd_get_filename (abfd
));
3970 bfd_set_error (bfd_error_bad_value
);
3977 p
->p_vaddr
= m
->sections
[0]->vma
;
3979 if (m
->p_paddr_valid
)
3980 p
->p_paddr
= m
->p_paddr
;
3981 else if (m
->count
== 0)
3984 p
->p_paddr
= m
->sections
[0]->lma
;
3986 if (p
->p_type
== PT_LOAD
3987 && (abfd
->flags
& D_PAGED
) != 0)
3988 p
->p_align
= bed
->maxpagesize
;
3989 else if (m
->count
== 0)
3990 p
->p_align
= 1 << bed
->s
->log_file_align
;
3998 if (m
->includes_filehdr
)
4000 if (! m
->p_flags_valid
)
4003 p
->p_filesz
= bed
->s
->sizeof_ehdr
;
4004 p
->p_memsz
= bed
->s
->sizeof_ehdr
;
4007 BFD_ASSERT (p
->p_type
== PT_LOAD
);
4009 if (p
->p_vaddr
< (bfd_vma
) off
)
4011 (*_bfd_error_handler
)
4012 (_("%s: Not enough room for program headers, try linking with -N"),
4013 bfd_get_filename (abfd
));
4014 bfd_set_error (bfd_error_bad_value
);
4019 if (! m
->p_paddr_valid
)
4022 if (p
->p_type
== PT_LOAD
)
4024 filehdr_vaddr
= p
->p_vaddr
;
4025 filehdr_paddr
= p
->p_paddr
;
4029 if (m
->includes_phdrs
)
4031 if (! m
->p_flags_valid
)
4034 if (m
->includes_filehdr
)
4036 if (p
->p_type
== PT_LOAD
)
4038 phdrs_vaddr
= p
->p_vaddr
+ bed
->s
->sizeof_ehdr
;
4039 phdrs_paddr
= p
->p_paddr
+ bed
->s
->sizeof_ehdr
;
4044 p
->p_offset
= bed
->s
->sizeof_ehdr
;
4048 BFD_ASSERT (p
->p_type
== PT_LOAD
);
4049 p
->p_vaddr
-= off
- p
->p_offset
;
4050 if (! m
->p_paddr_valid
)
4051 p
->p_paddr
-= off
- p
->p_offset
;
4054 if (p
->p_type
== PT_LOAD
)
4056 phdrs_vaddr
= p
->p_vaddr
;
4057 phdrs_paddr
= p
->p_paddr
;
4060 phdrs_vaddr
= bed
->maxpagesize
+ bed
->s
->sizeof_ehdr
;
4063 p
->p_filesz
+= alloc
* bed
->s
->sizeof_phdr
;
4064 p
->p_memsz
+= alloc
* bed
->s
->sizeof_phdr
;
4067 if (p
->p_type
== PT_LOAD
4068 || (p
->p_type
== PT_NOTE
&& bfd_get_format (abfd
) == bfd_core
))
4070 if (! m
->includes_filehdr
&& ! m
->includes_phdrs
)
4076 adjust
= off
- (p
->p_offset
+ p
->p_filesz
);
4077 p
->p_filesz
+= adjust
;
4078 p
->p_memsz
+= adjust
;
4084 for (i
= 0, secpp
= m
->sections
; i
< m
->count
; i
++, secpp
++)
4088 bfd_size_type align
;
4092 align
= 1 << bfd_get_section_alignment (abfd
, sec
);
4094 /* The section may have artificial alignment forced by a
4095 link script. Notice this case by the gap between the
4096 cumulative phdr lma and the section's lma. */
4097 if (p
->p_paddr
+ p
->p_memsz
< sec
->lma
)
4099 bfd_vma adjust
= sec
->lma
- (p
->p_paddr
+ p
->p_memsz
);
4101 p
->p_memsz
+= adjust
;
4102 if (p
->p_type
== PT_LOAD
4103 || (p
->p_type
== PT_NOTE
4104 && bfd_get_format (abfd
) == bfd_core
))
4109 if ((flags
& SEC_LOAD
) != 0
4110 || (flags
& SEC_THREAD_LOCAL
) != 0)
4111 p
->p_filesz
+= adjust
;
4114 if (p
->p_type
== PT_LOAD
)
4116 bfd_signed_vma adjust
;
4118 if ((flags
& SEC_LOAD
) != 0)
4120 adjust
= sec
->lma
- (p
->p_paddr
+ p
->p_memsz
);
4124 else if ((flags
& SEC_ALLOC
) != 0)
4126 /* The section VMA must equal the file position
4127 modulo the page size. FIXME: I'm not sure if
4128 this adjustment is really necessary. We used to
4129 not have the SEC_LOAD case just above, and then
4130 this was necessary, but now I'm not sure. */
4131 if ((abfd
->flags
& D_PAGED
) != 0)
4132 adjust
= vma_page_aligned_bias (sec
->vma
, voff
,
4135 adjust
= vma_page_aligned_bias (sec
->vma
, voff
,
4145 (* _bfd_error_handler
) (_("\
4146 Error: First section in segment (%s) starts at 0x%x whereas the segment starts at 0x%x"),
4147 bfd_section_name (abfd
, sec
),
4152 p
->p_memsz
+= adjust
;
4155 if ((flags
& SEC_LOAD
) != 0)
4156 p
->p_filesz
+= adjust
;
4161 /* We check SEC_HAS_CONTENTS here because if NOLOAD is
4162 used in a linker script we may have a section with
4163 SEC_LOAD clear but which is supposed to have
4165 if ((flags
& SEC_LOAD
) != 0
4166 || (flags
& SEC_HAS_CONTENTS
) != 0)
4169 if ((flags
& SEC_ALLOC
) != 0
4170 && ((flags
& SEC_LOAD
) != 0
4171 || (flags
& SEC_THREAD_LOCAL
) == 0))
4175 if (p
->p_type
== PT_NOTE
&& bfd_get_format (abfd
) == bfd_core
)
4177 /* The actual "note" segment has i == 0.
4178 This is the one that actually contains everything. */
4182 p
->p_filesz
= sec
->size
;
4188 /* Fake sections -- don't need to be written. */
4191 flags
= sec
->flags
= 0;
4198 if ((sec
->flags
& SEC_LOAD
) != 0
4199 || (sec
->flags
& SEC_THREAD_LOCAL
) == 0
4200 || p
->p_type
== PT_TLS
)
4201 p
->p_memsz
+= sec
->size
;
4203 if ((flags
& SEC_LOAD
) != 0)
4204 p
->p_filesz
+= sec
->size
;
4206 if (p
->p_type
== PT_TLS
4208 && (sec
->flags
& SEC_HAS_CONTENTS
) == 0)
4210 struct bfd_link_order
*o
;
4211 bfd_vma tbss_size
= 0;
4213 for (o
= sec
->link_order_head
; o
!= NULL
; o
= o
->next
)
4214 if (tbss_size
< o
->offset
+ o
->size
)
4215 tbss_size
= o
->offset
+ o
->size
;
4217 p
->p_memsz
+= tbss_size
;
4220 if (align
> p
->p_align
4221 && (p
->p_type
!= PT_LOAD
|| (abfd
->flags
& D_PAGED
) == 0))
4225 if (! m
->p_flags_valid
)
4228 if ((flags
& SEC_CODE
) != 0)
4230 if ((flags
& SEC_READONLY
) == 0)
4236 /* Now that we have set the section file positions, we can set up
4237 the file positions for the non PT_LOAD segments. */
4238 for (m
= elf_tdata (abfd
)->segment_map
, p
= phdrs
;
4242 if (p
->p_type
!= PT_LOAD
&& m
->count
> 0)
4244 BFD_ASSERT (! m
->includes_filehdr
&& ! m
->includes_phdrs
);
4245 /* If the section has not yet been assigned a file position,
4246 do so now. The ARM BPABI requires that .dynamic section
4247 not be marked SEC_ALLOC because it is not part of any
4248 PT_LOAD segment, so it will not be processed above. */
4249 if (p
->p_type
== PT_DYNAMIC
&& m
->sections
[0]->filepos
== 0)
4252 Elf_Internal_Shdr
** const i_shdrpp
= elf_elfsections (abfd
);
4255 while (i_shdrpp
[i
]->bfd_section
!= m
->sections
[0])
4257 off
= (_bfd_elf_assign_file_position_for_section
4258 (i_shdrpp
[i
], off
, TRUE
));
4259 p
->p_filesz
= m
->sections
[0]->size
;
4261 p
->p_offset
= m
->sections
[0]->filepos
;
4265 if (m
->includes_filehdr
)
4267 p
->p_vaddr
= filehdr_vaddr
;
4268 if (! m
->p_paddr_valid
)
4269 p
->p_paddr
= filehdr_paddr
;
4271 else if (m
->includes_phdrs
)
4273 p
->p_vaddr
= phdrs_vaddr
;
4274 if (! m
->p_paddr_valid
)
4275 p
->p_paddr
= phdrs_paddr
;
4277 else if (p
->p_type
== PT_GNU_RELRO
)
4279 Elf_Internal_Phdr
*lp
;
4281 for (lp
= phdrs
; lp
< phdrs
+ count
; ++lp
)
4283 if (lp
->p_type
== PT_LOAD
4284 && lp
->p_vaddr
<= link_info
->relro_end
4285 && lp
->p_vaddr
>= link_info
->relro_start
4286 && lp
->p_vaddr
+ lp
->p_filesz
4287 >= link_info
->relro_end
)
4291 if (lp
< phdrs
+ count
4292 && link_info
->relro_end
> lp
->p_vaddr
)
4294 p
->p_vaddr
= lp
->p_vaddr
;
4295 p
->p_paddr
= lp
->p_paddr
;
4296 p
->p_offset
= lp
->p_offset
;
4297 p
->p_filesz
= link_info
->relro_end
- lp
->p_vaddr
;
4298 p
->p_memsz
= p
->p_filesz
;
4300 p
->p_flags
= (lp
->p_flags
& ~PF_W
);
4304 memset (p
, 0, sizeof *p
);
4305 p
->p_type
= PT_NULL
;
4311 /* Clear out any program headers we allocated but did not use. */
4312 for (; count
< alloc
; count
++, p
++)
4314 memset (p
, 0, sizeof *p
);
4315 p
->p_type
= PT_NULL
;
4318 elf_tdata (abfd
)->phdr
= phdrs
;
4320 elf_tdata (abfd
)->next_file_pos
= off
;
4322 /* Write out the program headers. */
4323 if (bfd_seek (abfd
, (bfd_signed_vma
) bed
->s
->sizeof_ehdr
, SEEK_SET
) != 0
4324 || bed
->s
->write_out_phdrs (abfd
, phdrs
, alloc
) != 0)
4330 /* Get the size of the program header.
4332 If this is called by the linker before any of the section VMA's are set, it
4333 can't calculate the correct value for a strange memory layout. This only
4334 happens when SIZEOF_HEADERS is used in a linker script. In this case,
4335 SORTED_HDRS is NULL and we assume the normal scenario of one text and one
4336 data segment (exclusive of .interp and .dynamic).
4338 ??? User written scripts must either not use SIZEOF_HEADERS, or assume there
4339 will be two segments. */
4341 static bfd_size_type
4342 get_program_header_size (bfd
*abfd
)
4346 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4348 /* We can't return a different result each time we're called. */
4349 if (elf_tdata (abfd
)->program_header_size
!= 0)
4350 return elf_tdata (abfd
)->program_header_size
;
4352 if (elf_tdata (abfd
)->segment_map
!= NULL
)
4354 struct elf_segment_map
*m
;
4357 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
4359 elf_tdata (abfd
)->program_header_size
= segs
* bed
->s
->sizeof_phdr
;
4360 return elf_tdata (abfd
)->program_header_size
;
4363 /* Assume we will need exactly two PT_LOAD segments: one for text
4364 and one for data. */
4367 s
= bfd_get_section_by_name (abfd
, ".interp");
4368 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0)
4370 /* If we have a loadable interpreter section, we need a
4371 PT_INTERP segment. In this case, assume we also need a
4372 PT_PHDR segment, although that may not be true for all
4377 if (bfd_get_section_by_name (abfd
, ".dynamic") != NULL
)
4379 /* We need a PT_DYNAMIC segment. */
4383 if (elf_tdata (abfd
)->eh_frame_hdr
)
4385 /* We need a PT_GNU_EH_FRAME segment. */
4389 if (elf_tdata (abfd
)->stack_flags
)
4391 /* We need a PT_GNU_STACK segment. */
4395 if (elf_tdata (abfd
)->relro
)
4397 /* We need a PT_GNU_RELRO segment. */
4401 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
4403 if ((s
->flags
& SEC_LOAD
) != 0
4404 && strncmp (s
->name
, ".note", 5) == 0)
4406 /* We need a PT_NOTE segment. */
4411 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
4413 if (s
->flags
& SEC_THREAD_LOCAL
)
4415 /* We need a PT_TLS segment. */
4421 /* Let the backend count up any program headers it might need. */
4422 if (bed
->elf_backend_additional_program_headers
)
4426 a
= (*bed
->elf_backend_additional_program_headers
) (abfd
);
4432 elf_tdata (abfd
)->program_header_size
= segs
* bed
->s
->sizeof_phdr
;
4433 return elf_tdata (abfd
)->program_header_size
;
4436 /* Work out the file positions of all the sections. This is called by
4437 _bfd_elf_compute_section_file_positions. All the section sizes and
4438 VMAs must be known before this is called.
4440 Reloc sections come in two flavours: Those processed specially as
4441 "side-channel" data attached to a section to which they apply, and
4442 those that bfd doesn't process as relocations. The latter sort are
4443 stored in a normal bfd section by bfd_section_from_shdr. We don't
4444 consider the former sort here, unless they form part of the loadable
4445 image. Reloc sections not assigned here will be handled later by
4446 assign_file_positions_for_relocs.
4448 We also don't set the positions of the .symtab and .strtab here. */
4451 assign_file_positions_except_relocs (bfd
*abfd
,
4452 struct bfd_link_info
*link_info
)
4454 struct elf_obj_tdata
* const tdata
= elf_tdata (abfd
);
4455 Elf_Internal_Ehdr
* const i_ehdrp
= elf_elfheader (abfd
);
4456 Elf_Internal_Shdr
** const i_shdrpp
= elf_elfsections (abfd
);
4457 unsigned int num_sec
= elf_numsections (abfd
);
4459 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4461 if ((abfd
->flags
& (EXEC_P
| DYNAMIC
)) == 0
4462 && bfd_get_format (abfd
) != bfd_core
)
4464 Elf_Internal_Shdr
**hdrpp
;
4467 /* Start after the ELF header. */
4468 off
= i_ehdrp
->e_ehsize
;
4470 /* We are not creating an executable, which means that we are
4471 not creating a program header, and that the actual order of
4472 the sections in the file is unimportant. */
4473 for (i
= 1, hdrpp
= i_shdrpp
+ 1; i
< num_sec
; i
++, hdrpp
++)
4475 Elf_Internal_Shdr
*hdr
;
4478 if (((hdr
->sh_type
== SHT_REL
|| hdr
->sh_type
== SHT_RELA
)
4479 && hdr
->bfd_section
== NULL
)
4480 || i
== tdata
->symtab_section
4481 || i
== tdata
->symtab_shndx_section
4482 || i
== tdata
->strtab_section
)
4484 hdr
->sh_offset
= -1;
4487 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
4489 if (i
== SHN_LORESERVE
- 1)
4491 i
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4492 hdrpp
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4499 Elf_Internal_Shdr
**hdrpp
;
4501 /* Assign file positions for the loaded sections based on the
4502 assignment of sections to segments. */
4503 if (! assign_file_positions_for_segments (abfd
, link_info
))
4506 /* Assign file positions for the other sections. */
4508 off
= elf_tdata (abfd
)->next_file_pos
;
4509 for (i
= 1, hdrpp
= i_shdrpp
+ 1; i
< num_sec
; i
++, hdrpp
++)
4511 Elf_Internal_Shdr
*hdr
;
4514 if (hdr
->bfd_section
!= NULL
4515 && hdr
->bfd_section
->filepos
!= 0)
4516 hdr
->sh_offset
= hdr
->bfd_section
->filepos
;
4517 else if ((hdr
->sh_flags
& SHF_ALLOC
) != 0)
4519 ((*_bfd_error_handler
)
4520 (_("%s: warning: allocated section `%s' not in segment"),
4521 bfd_get_filename (abfd
),
4522 (hdr
->bfd_section
== NULL
4524 : hdr
->bfd_section
->name
)));
4525 if ((abfd
->flags
& D_PAGED
) != 0)
4526 off
+= vma_page_aligned_bias (hdr
->sh_addr
, off
,
4529 off
+= vma_page_aligned_bias (hdr
->sh_addr
, off
,
4531 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
,
4534 else if (((hdr
->sh_type
== SHT_REL
|| hdr
->sh_type
== SHT_RELA
)
4535 && hdr
->bfd_section
== NULL
)
4536 || hdr
== i_shdrpp
[tdata
->symtab_section
]
4537 || hdr
== i_shdrpp
[tdata
->symtab_shndx_section
]
4538 || hdr
== i_shdrpp
[tdata
->strtab_section
])
4539 hdr
->sh_offset
= -1;
4541 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
4543 if (i
== SHN_LORESERVE
- 1)
4545 i
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4546 hdrpp
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4551 /* Place the section headers. */
4552 off
= align_file_position (off
, 1 << bed
->s
->log_file_align
);
4553 i_ehdrp
->e_shoff
= off
;
4554 off
+= i_ehdrp
->e_shnum
* i_ehdrp
->e_shentsize
;
4556 elf_tdata (abfd
)->next_file_pos
= off
;
4562 prep_headers (bfd
*abfd
)
4564 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
4565 Elf_Internal_Phdr
*i_phdrp
= 0; /* Program header table, internal form */
4566 Elf_Internal_Shdr
**i_shdrp
; /* Section header table, internal form */
4567 struct elf_strtab_hash
*shstrtab
;
4568 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4570 i_ehdrp
= elf_elfheader (abfd
);
4571 i_shdrp
= elf_elfsections (abfd
);
4573 shstrtab
= _bfd_elf_strtab_init ();
4574 if (shstrtab
== NULL
)
4577 elf_shstrtab (abfd
) = shstrtab
;
4579 i_ehdrp
->e_ident
[EI_MAG0
] = ELFMAG0
;
4580 i_ehdrp
->e_ident
[EI_MAG1
] = ELFMAG1
;
4581 i_ehdrp
->e_ident
[EI_MAG2
] = ELFMAG2
;
4582 i_ehdrp
->e_ident
[EI_MAG3
] = ELFMAG3
;
4584 i_ehdrp
->e_ident
[EI_CLASS
] = bed
->s
->elfclass
;
4585 i_ehdrp
->e_ident
[EI_DATA
] =
4586 bfd_big_endian (abfd
) ? ELFDATA2MSB
: ELFDATA2LSB
;
4587 i_ehdrp
->e_ident
[EI_VERSION
] = bed
->s
->ev_current
;
4589 if ((abfd
->flags
& DYNAMIC
) != 0)
4590 i_ehdrp
->e_type
= ET_DYN
;
4591 else if ((abfd
->flags
& EXEC_P
) != 0)
4592 i_ehdrp
->e_type
= ET_EXEC
;
4593 else if (bfd_get_format (abfd
) == bfd_core
)
4594 i_ehdrp
->e_type
= ET_CORE
;
4596 i_ehdrp
->e_type
= ET_REL
;
4598 switch (bfd_get_arch (abfd
))
4600 case bfd_arch_unknown
:
4601 i_ehdrp
->e_machine
= EM_NONE
;
4604 /* There used to be a long list of cases here, each one setting
4605 e_machine to the same EM_* macro #defined as ELF_MACHINE_CODE
4606 in the corresponding bfd definition. To avoid duplication,
4607 the switch was removed. Machines that need special handling
4608 can generally do it in elf_backend_final_write_processing(),
4609 unless they need the information earlier than the final write.
4610 Such need can generally be supplied by replacing the tests for
4611 e_machine with the conditions used to determine it. */
4613 i_ehdrp
->e_machine
= bed
->elf_machine_code
;
4616 i_ehdrp
->e_version
= bed
->s
->ev_current
;
4617 i_ehdrp
->e_ehsize
= bed
->s
->sizeof_ehdr
;
4619 /* No program header, for now. */
4620 i_ehdrp
->e_phoff
= 0;
4621 i_ehdrp
->e_phentsize
= 0;
4622 i_ehdrp
->e_phnum
= 0;
4624 /* Each bfd section is section header entry. */
4625 i_ehdrp
->e_entry
= bfd_get_start_address (abfd
);
4626 i_ehdrp
->e_shentsize
= bed
->s
->sizeof_shdr
;
4628 /* If we're building an executable, we'll need a program header table. */
4629 if (abfd
->flags
& EXEC_P
)
4631 /* It all happens later. */
4633 i_ehdrp
->e_phentsize
= sizeof (Elf_External_Phdr
);
4635 /* elf_build_phdrs() returns a (NULL-terminated) array of
4636 Elf_Internal_Phdrs. */
4637 i_phdrp
= elf_build_phdrs (abfd
, i_ehdrp
, i_shdrp
, &i_ehdrp
->e_phnum
);
4638 i_ehdrp
->e_phoff
= outbase
;
4639 outbase
+= i_ehdrp
->e_phentsize
* i_ehdrp
->e_phnum
;
4644 i_ehdrp
->e_phentsize
= 0;
4646 i_ehdrp
->e_phoff
= 0;
4649 elf_tdata (abfd
)->symtab_hdr
.sh_name
=
4650 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".symtab", FALSE
);
4651 elf_tdata (abfd
)->strtab_hdr
.sh_name
=
4652 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".strtab", FALSE
);
4653 elf_tdata (abfd
)->shstrtab_hdr
.sh_name
=
4654 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".shstrtab", FALSE
);
4655 if (elf_tdata (abfd
)->symtab_hdr
.sh_name
== (unsigned int) -1
4656 || elf_tdata (abfd
)->symtab_hdr
.sh_name
== (unsigned int) -1
4657 || elf_tdata (abfd
)->shstrtab_hdr
.sh_name
== (unsigned int) -1)
4663 /* Assign file positions for all the reloc sections which are not part
4664 of the loadable file image. */
4667 _bfd_elf_assign_file_positions_for_relocs (bfd
*abfd
)
4670 unsigned int i
, num_sec
;
4671 Elf_Internal_Shdr
**shdrpp
;
4673 off
= elf_tdata (abfd
)->next_file_pos
;
4675 num_sec
= elf_numsections (abfd
);
4676 for (i
= 1, shdrpp
= elf_elfsections (abfd
) + 1; i
< num_sec
; i
++, shdrpp
++)
4678 Elf_Internal_Shdr
*shdrp
;
4681 if ((shdrp
->sh_type
== SHT_REL
|| shdrp
->sh_type
== SHT_RELA
)
4682 && shdrp
->sh_offset
== -1)
4683 off
= _bfd_elf_assign_file_position_for_section (shdrp
, off
, TRUE
);
4686 elf_tdata (abfd
)->next_file_pos
= off
;
4690 _bfd_elf_write_object_contents (bfd
*abfd
)
4692 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4693 Elf_Internal_Ehdr
*i_ehdrp
;
4694 Elf_Internal_Shdr
**i_shdrp
;
4696 unsigned int count
, num_sec
;
4698 if (! abfd
->output_has_begun
4699 && ! _bfd_elf_compute_section_file_positions (abfd
, NULL
))
4702 i_shdrp
= elf_elfsections (abfd
);
4703 i_ehdrp
= elf_elfheader (abfd
);
4706 bfd_map_over_sections (abfd
, bed
->s
->write_relocs
, &failed
);
4710 _bfd_elf_assign_file_positions_for_relocs (abfd
);
4712 /* After writing the headers, we need to write the sections too... */
4713 num_sec
= elf_numsections (abfd
);
4714 for (count
= 1; count
< num_sec
; count
++)
4716 if (bed
->elf_backend_section_processing
)
4717 (*bed
->elf_backend_section_processing
) (abfd
, i_shdrp
[count
]);
4718 if (i_shdrp
[count
]->contents
)
4720 bfd_size_type amt
= i_shdrp
[count
]->sh_size
;
4722 if (bfd_seek (abfd
, i_shdrp
[count
]->sh_offset
, SEEK_SET
) != 0
4723 || bfd_bwrite (i_shdrp
[count
]->contents
, amt
, abfd
) != amt
)
4726 if (count
== SHN_LORESERVE
- 1)
4727 count
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4730 /* Write out the section header names. */
4731 if (bfd_seek (abfd
, elf_tdata (abfd
)->shstrtab_hdr
.sh_offset
, SEEK_SET
) != 0
4732 || ! _bfd_elf_strtab_emit (abfd
, elf_shstrtab (abfd
)))
4735 if (bed
->elf_backend_final_write_processing
)
4736 (*bed
->elf_backend_final_write_processing
) (abfd
,
4737 elf_tdata (abfd
)->linker
);
4739 return bed
->s
->write_shdrs_and_ehdr (abfd
);
4743 _bfd_elf_write_corefile_contents (bfd
*abfd
)
4745 /* Hopefully this can be done just like an object file. */
4746 return _bfd_elf_write_object_contents (abfd
);
4749 /* Given a section, search the header to find them. */
4752 _bfd_elf_section_from_bfd_section (bfd
*abfd
, struct bfd_section
*asect
)
4754 const struct elf_backend_data
*bed
;
4757 if (elf_section_data (asect
) != NULL
4758 && elf_section_data (asect
)->this_idx
!= 0)
4759 return elf_section_data (asect
)->this_idx
;
4761 if (bfd_is_abs_section (asect
))
4763 else if (bfd_is_com_section (asect
))
4765 else if (bfd_is_und_section (asect
))
4769 Elf_Internal_Shdr
**i_shdrp
= elf_elfsections (abfd
);
4770 int maxindex
= elf_numsections (abfd
);
4772 for (index
= 1; index
< maxindex
; index
++)
4774 Elf_Internal_Shdr
*hdr
= i_shdrp
[index
];
4776 if (hdr
!= NULL
&& hdr
->bfd_section
== asect
)
4782 bed
= get_elf_backend_data (abfd
);
4783 if (bed
->elf_backend_section_from_bfd_section
)
4787 if ((*bed
->elf_backend_section_from_bfd_section
) (abfd
, asect
, &retval
))
4792 bfd_set_error (bfd_error_nonrepresentable_section
);
4797 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
4801 _bfd_elf_symbol_from_bfd_symbol (bfd
*abfd
, asymbol
**asym_ptr_ptr
)
4803 asymbol
*asym_ptr
= *asym_ptr_ptr
;
4805 flagword flags
= asym_ptr
->flags
;
4807 /* When gas creates relocations against local labels, it creates its
4808 own symbol for the section, but does put the symbol into the
4809 symbol chain, so udata is 0. When the linker is generating
4810 relocatable output, this section symbol may be for one of the
4811 input sections rather than the output section. */
4812 if (asym_ptr
->udata
.i
== 0
4813 && (flags
& BSF_SECTION_SYM
)
4814 && asym_ptr
->section
)
4818 if (asym_ptr
->section
->output_section
!= NULL
)
4819 indx
= asym_ptr
->section
->output_section
->index
;
4821 indx
= asym_ptr
->section
->index
;
4822 if (indx
< elf_num_section_syms (abfd
)
4823 && elf_section_syms (abfd
)[indx
] != NULL
)
4824 asym_ptr
->udata
.i
= elf_section_syms (abfd
)[indx
]->udata
.i
;
4827 idx
= asym_ptr
->udata
.i
;
4831 /* This case can occur when using --strip-symbol on a symbol
4832 which is used in a relocation entry. */
4833 (*_bfd_error_handler
)
4834 (_("%B: symbol `%s' required but not present"),
4835 abfd
, bfd_asymbol_name (asym_ptr
));
4836 bfd_set_error (bfd_error_no_symbols
);
4843 "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n",
4844 (long) asym_ptr
, asym_ptr
->name
, idx
, flags
,
4845 elf_symbol_flags (flags
));
4853 /* Copy private BFD data. This copies any program header information. */
4856 copy_private_bfd_data (bfd
*ibfd
, bfd
*obfd
)
4858 Elf_Internal_Ehdr
*iehdr
;
4859 struct elf_segment_map
*map
;
4860 struct elf_segment_map
*map_first
;
4861 struct elf_segment_map
**pointer_to_map
;
4862 Elf_Internal_Phdr
*segment
;
4865 unsigned int num_segments
;
4866 bfd_boolean phdr_included
= FALSE
;
4867 bfd_vma maxpagesize
;
4868 struct elf_segment_map
*phdr_adjust_seg
= NULL
;
4869 unsigned int phdr_adjust_num
= 0;
4870 const struct elf_backend_data
*bed
;
4872 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
4873 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
4876 if (elf_tdata (ibfd
)->phdr
== NULL
)
4879 bed
= get_elf_backend_data (ibfd
);
4880 iehdr
= elf_elfheader (ibfd
);
4883 pointer_to_map
= &map_first
;
4885 num_segments
= elf_elfheader (ibfd
)->e_phnum
;
4886 maxpagesize
= get_elf_backend_data (obfd
)->maxpagesize
;
4888 /* Returns the end address of the segment + 1. */
4889 #define SEGMENT_END(segment, start) \
4890 (start + (segment->p_memsz > segment->p_filesz \
4891 ? segment->p_memsz : segment->p_filesz))
4893 #define SECTION_SIZE(section, segment) \
4894 (((section->flags & (SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) \
4895 != SEC_THREAD_LOCAL || segment->p_type == PT_TLS) \
4896 ? section->size : 0)
4898 /* Returns TRUE if the given section is contained within
4899 the given segment. VMA addresses are compared. */
4900 #define IS_CONTAINED_BY_VMA(section, segment) \
4901 (section->vma >= segment->p_vaddr \
4902 && (section->vma + SECTION_SIZE (section, segment) \
4903 <= (SEGMENT_END (segment, segment->p_vaddr))))
4905 /* Returns TRUE if the given section is contained within
4906 the given segment. LMA addresses are compared. */
4907 #define IS_CONTAINED_BY_LMA(section, segment, base) \
4908 (section->lma >= base \
4909 && (section->lma + SECTION_SIZE (section, segment) \
4910 <= SEGMENT_END (segment, base)))
4912 /* Special case: corefile "NOTE" section containing regs, prpsinfo etc. */
4913 #define IS_COREFILE_NOTE(p, s) \
4914 (p->p_type == PT_NOTE \
4915 && bfd_get_format (ibfd) == bfd_core \
4916 && s->vma == 0 && s->lma == 0 \
4917 && (bfd_vma) s->filepos >= p->p_offset \
4918 && ((bfd_vma) s->filepos + s->size \
4919 <= p->p_offset + p->p_filesz))
4921 /* The complicated case when p_vaddr is 0 is to handle the Solaris
4922 linker, which generates a PT_INTERP section with p_vaddr and
4923 p_memsz set to 0. */
4924 #define IS_SOLARIS_PT_INTERP(p, s) \
4926 && p->p_paddr == 0 \
4927 && p->p_memsz == 0 \
4928 && p->p_filesz > 0 \
4929 && (s->flags & SEC_HAS_CONTENTS) != 0 \
4931 && (bfd_vma) s->filepos >= p->p_offset \
4932 && ((bfd_vma) s->filepos + s->size \
4933 <= p->p_offset + p->p_filesz))
4935 /* Decide if the given section should be included in the given segment.
4936 A section will be included if:
4937 1. It is within the address space of the segment -- we use the LMA
4938 if that is set for the segment and the VMA otherwise,
4939 2. It is an allocated segment,
4940 3. There is an output section associated with it,
4941 4. The section has not already been allocated to a previous segment.
4942 5. PT_GNU_STACK segments do not include any sections.
4943 6. PT_TLS segment includes only SHF_TLS sections.
4944 7. SHF_TLS sections are only in PT_TLS or PT_LOAD segments. */
4945 #define INCLUDE_SECTION_IN_SEGMENT(section, segment, bed) \
4946 ((((segment->p_paddr \
4947 ? IS_CONTAINED_BY_LMA (section, segment, segment->p_paddr) \
4948 : IS_CONTAINED_BY_VMA (section, segment)) \
4949 && (section->flags & SEC_ALLOC) != 0) \
4950 || IS_COREFILE_NOTE (segment, section)) \
4951 && section->output_section != NULL \
4952 && segment->p_type != PT_GNU_STACK \
4953 && (segment->p_type != PT_TLS \
4954 || (section->flags & SEC_THREAD_LOCAL)) \
4955 && (segment->p_type == PT_LOAD \
4956 || segment->p_type == PT_TLS \
4957 || (section->flags & SEC_THREAD_LOCAL) == 0) \
4958 && ! section->segment_mark)
4960 /* Returns TRUE iff seg1 starts after the end of seg2. */
4961 #define SEGMENT_AFTER_SEGMENT(seg1, seg2, field) \
4962 (seg1->field >= SEGMENT_END (seg2, seg2->field))
4964 /* Returns TRUE iff seg1 and seg2 overlap. Segments overlap iff both
4965 their VMA address ranges and their LMA address ranges overlap.
4966 It is possible to have overlapping VMA ranges without overlapping LMA
4967 ranges. RedBoot images for example can have both .data and .bss mapped
4968 to the same VMA range, but with the .data section mapped to a different
4970 #define SEGMENT_OVERLAPS(seg1, seg2) \
4971 ( !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_vaddr) \
4972 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_vaddr)) \
4973 && !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_paddr) \
4974 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_paddr)))
4976 /* Initialise the segment mark field. */
4977 for (section
= ibfd
->sections
; section
!= NULL
; section
= section
->next
)
4978 section
->segment_mark
= FALSE
;
4980 /* Scan through the segments specified in the program header
4981 of the input BFD. For this first scan we look for overlaps
4982 in the loadable segments. These can be created by weird
4983 parameters to objcopy. Also, fix some solaris weirdness. */
4984 for (i
= 0, segment
= elf_tdata (ibfd
)->phdr
;
4989 Elf_Internal_Phdr
*segment2
;
4991 if (segment
->p_type
== PT_INTERP
)
4992 for (section
= ibfd
->sections
; section
; section
= section
->next
)
4993 if (IS_SOLARIS_PT_INTERP (segment
, section
))
4995 /* Mininal change so that the normal section to segment
4996 assignment code will work. */
4997 segment
->p_vaddr
= section
->vma
;
5001 if (segment
->p_type
!= PT_LOAD
)
5004 /* Determine if this segment overlaps any previous segments. */
5005 for (j
= 0, segment2
= elf_tdata (ibfd
)->phdr
; j
< i
; j
++, segment2
++)
5007 bfd_signed_vma extra_length
;
5009 if (segment2
->p_type
!= PT_LOAD
5010 || ! SEGMENT_OVERLAPS (segment
, segment2
))
5013 /* Merge the two segments together. */
5014 if (segment2
->p_vaddr
< segment
->p_vaddr
)
5016 /* Extend SEGMENT2 to include SEGMENT and then delete
5019 SEGMENT_END (segment
, segment
->p_vaddr
)
5020 - SEGMENT_END (segment2
, segment2
->p_vaddr
);
5022 if (extra_length
> 0)
5024 segment2
->p_memsz
+= extra_length
;
5025 segment2
->p_filesz
+= extra_length
;
5028 segment
->p_type
= PT_NULL
;
5030 /* Since we have deleted P we must restart the outer loop. */
5032 segment
= elf_tdata (ibfd
)->phdr
;
5037 /* Extend SEGMENT to include SEGMENT2 and then delete
5040 SEGMENT_END (segment2
, segment2
->p_vaddr
)
5041 - SEGMENT_END (segment
, segment
->p_vaddr
);
5043 if (extra_length
> 0)
5045 segment
->p_memsz
+= extra_length
;
5046 segment
->p_filesz
+= extra_length
;
5049 segment2
->p_type
= PT_NULL
;
5054 /* The second scan attempts to assign sections to segments. */
5055 for (i
= 0, segment
= elf_tdata (ibfd
)->phdr
;
5059 unsigned int section_count
;
5060 asection
** sections
;
5061 asection
* output_section
;
5063 bfd_vma matching_lma
;
5064 bfd_vma suggested_lma
;
5068 if (segment
->p_type
== PT_NULL
)
5071 /* Compute how many sections might be placed into this segment. */
5072 for (section
= ibfd
->sections
, section_count
= 0;
5074 section
= section
->next
)
5075 if (INCLUDE_SECTION_IN_SEGMENT (section
, segment
, bed
))
5078 /* Allocate a segment map big enough to contain
5079 all of the sections we have selected. */
5080 amt
= sizeof (struct elf_segment_map
);
5081 amt
+= ((bfd_size_type
) section_count
- 1) * sizeof (asection
*);
5082 map
= bfd_alloc (obfd
, amt
);
5086 /* Initialise the fields of the segment map. Default to
5087 using the physical address of the segment in the input BFD. */
5089 map
->p_type
= segment
->p_type
;
5090 map
->p_flags
= segment
->p_flags
;
5091 map
->p_flags_valid
= 1;
5092 map
->p_paddr
= segment
->p_paddr
;
5093 map
->p_paddr_valid
= 1;
5095 /* Determine if this segment contains the ELF file header
5096 and if it contains the program headers themselves. */
5097 map
->includes_filehdr
= (segment
->p_offset
== 0
5098 && segment
->p_filesz
>= iehdr
->e_ehsize
);
5100 map
->includes_phdrs
= 0;
5102 if (! phdr_included
|| segment
->p_type
!= PT_LOAD
)
5104 map
->includes_phdrs
=
5105 (segment
->p_offset
<= (bfd_vma
) iehdr
->e_phoff
5106 && (segment
->p_offset
+ segment
->p_filesz
5107 >= ((bfd_vma
) iehdr
->e_phoff
5108 + iehdr
->e_phnum
* iehdr
->e_phentsize
)));
5110 if (segment
->p_type
== PT_LOAD
&& map
->includes_phdrs
)
5111 phdr_included
= TRUE
;
5114 if (section_count
== 0)
5116 /* Special segments, such as the PT_PHDR segment, may contain
5117 no sections, but ordinary, loadable segments should contain
5118 something. They are allowed by the ELF spec however, so only
5119 a warning is produced. */
5120 if (segment
->p_type
== PT_LOAD
)
5121 (*_bfd_error_handler
)
5122 (_("%B: warning: Empty loadable segment detected, is this intentional ?\n"),
5126 *pointer_to_map
= map
;
5127 pointer_to_map
= &map
->next
;
5132 /* Now scan the sections in the input BFD again and attempt
5133 to add their corresponding output sections to the segment map.
5134 The problem here is how to handle an output section which has
5135 been moved (ie had its LMA changed). There are four possibilities:
5137 1. None of the sections have been moved.
5138 In this case we can continue to use the segment LMA from the
5141 2. All of the sections have been moved by the same amount.
5142 In this case we can change the segment's LMA to match the LMA
5143 of the first section.
5145 3. Some of the sections have been moved, others have not.
5146 In this case those sections which have not been moved can be
5147 placed in the current segment which will have to have its size,
5148 and possibly its LMA changed, and a new segment or segments will
5149 have to be created to contain the other sections.
5151 4. The sections have been moved, but not by the same amount.
5152 In this case we can change the segment's LMA to match the LMA
5153 of the first section and we will have to create a new segment
5154 or segments to contain the other sections.
5156 In order to save time, we allocate an array to hold the section
5157 pointers that we are interested in. As these sections get assigned
5158 to a segment, they are removed from this array. */
5160 /* Gcc 2.96 miscompiles this code on mips. Don't do casting here
5161 to work around this long long bug. */
5162 amt
= section_count
* sizeof (asection
*);
5163 sections
= bfd_malloc (amt
);
5164 if (sections
== NULL
)
5167 /* Step One: Scan for segment vs section LMA conflicts.
5168 Also add the sections to the section array allocated above.
5169 Also add the sections to the current segment. In the common
5170 case, where the sections have not been moved, this means that
5171 we have completely filled the segment, and there is nothing
5177 for (j
= 0, section
= ibfd
->sections
;
5179 section
= section
->next
)
5181 if (INCLUDE_SECTION_IN_SEGMENT (section
, segment
, bed
))
5183 output_section
= section
->output_section
;
5185 sections
[j
++] = section
;
5187 /* The Solaris native linker always sets p_paddr to 0.
5188 We try to catch that case here, and set it to the
5189 correct value. Note - some backends require that
5190 p_paddr be left as zero. */
5191 if (segment
->p_paddr
== 0
5192 && segment
->p_vaddr
!= 0
5193 && (! bed
->want_p_paddr_set_to_zero
)
5195 && output_section
->lma
!= 0
5196 && (output_section
->vma
== (segment
->p_vaddr
5197 + (map
->includes_filehdr
5200 + (map
->includes_phdrs
5202 * iehdr
->e_phentsize
)
5204 map
->p_paddr
= segment
->p_vaddr
;
5206 /* Match up the physical address of the segment with the
5207 LMA address of the output section. */
5208 if (IS_CONTAINED_BY_LMA (output_section
, segment
, map
->p_paddr
)
5209 || IS_COREFILE_NOTE (segment
, section
)
5210 || (bed
->want_p_paddr_set_to_zero
&&
5211 IS_CONTAINED_BY_VMA (output_section
, segment
))
5214 if (matching_lma
== 0)
5215 matching_lma
= output_section
->lma
;
5217 /* We assume that if the section fits within the segment
5218 then it does not overlap any other section within that
5220 map
->sections
[isec
++] = output_section
;
5222 else if (suggested_lma
== 0)
5223 suggested_lma
= output_section
->lma
;
5227 BFD_ASSERT (j
== section_count
);
5229 /* Step Two: Adjust the physical address of the current segment,
5231 if (isec
== section_count
)
5233 /* All of the sections fitted within the segment as currently
5234 specified. This is the default case. Add the segment to
5235 the list of built segments and carry on to process the next
5236 program header in the input BFD. */
5237 map
->count
= section_count
;
5238 *pointer_to_map
= map
;
5239 pointer_to_map
= &map
->next
;
5246 if (matching_lma
!= 0)
5248 /* At least one section fits inside the current segment.
5249 Keep it, but modify its physical address to match the
5250 LMA of the first section that fitted. */
5251 map
->p_paddr
= matching_lma
;
5255 /* None of the sections fitted inside the current segment.
5256 Change the current segment's physical address to match
5257 the LMA of the first section. */
5258 map
->p_paddr
= suggested_lma
;
5261 /* Offset the segment physical address from the lma
5262 to allow for space taken up by elf headers. */
5263 if (map
->includes_filehdr
)
5264 map
->p_paddr
-= iehdr
->e_ehsize
;
5266 if (map
->includes_phdrs
)
5268 map
->p_paddr
-= iehdr
->e_phnum
* iehdr
->e_phentsize
;
5270 /* iehdr->e_phnum is just an estimate of the number
5271 of program headers that we will need. Make a note
5272 here of the number we used and the segment we chose
5273 to hold these headers, so that we can adjust the
5274 offset when we know the correct value. */
5275 phdr_adjust_num
= iehdr
->e_phnum
;
5276 phdr_adjust_seg
= map
;
5280 /* Step Three: Loop over the sections again, this time assigning
5281 those that fit to the current segment and removing them from the
5282 sections array; but making sure not to leave large gaps. Once all
5283 possible sections have been assigned to the current segment it is
5284 added to the list of built segments and if sections still remain
5285 to be assigned, a new segment is constructed before repeating
5293 /* Fill the current segment with sections that fit. */
5294 for (j
= 0; j
< section_count
; j
++)
5296 section
= sections
[j
];
5298 if (section
== NULL
)
5301 output_section
= section
->output_section
;
5303 BFD_ASSERT (output_section
!= NULL
);
5305 if (IS_CONTAINED_BY_LMA (output_section
, segment
, map
->p_paddr
)
5306 || IS_COREFILE_NOTE (segment
, section
))
5308 if (map
->count
== 0)
5310 /* If the first section in a segment does not start at
5311 the beginning of the segment, then something is
5313 if (output_section
->lma
!=
5315 + (map
->includes_filehdr
? iehdr
->e_ehsize
: 0)
5316 + (map
->includes_phdrs
5317 ? iehdr
->e_phnum
* iehdr
->e_phentsize
5323 asection
* prev_sec
;
5325 prev_sec
= map
->sections
[map
->count
- 1];
5327 /* If the gap between the end of the previous section
5328 and the start of this section is more than
5329 maxpagesize then we need to start a new segment. */
5330 if ((BFD_ALIGN (prev_sec
->lma
+ prev_sec
->size
,
5332 < BFD_ALIGN (output_section
->lma
, maxpagesize
))
5333 || ((prev_sec
->lma
+ prev_sec
->size
)
5334 > output_section
->lma
))
5336 if (suggested_lma
== 0)
5337 suggested_lma
= output_section
->lma
;
5343 map
->sections
[map
->count
++] = output_section
;
5346 section
->segment_mark
= TRUE
;
5348 else if (suggested_lma
== 0)
5349 suggested_lma
= output_section
->lma
;
5352 BFD_ASSERT (map
->count
> 0);
5354 /* Add the current segment to the list of built segments. */
5355 *pointer_to_map
= map
;
5356 pointer_to_map
= &map
->next
;
5358 if (isec
< section_count
)
5360 /* We still have not allocated all of the sections to
5361 segments. Create a new segment here, initialise it
5362 and carry on looping. */
5363 amt
= sizeof (struct elf_segment_map
);
5364 amt
+= ((bfd_size_type
) section_count
- 1) * sizeof (asection
*);
5365 map
= bfd_alloc (obfd
, amt
);
5372 /* Initialise the fields of the segment map. Set the physical
5373 physical address to the LMA of the first section that has
5374 not yet been assigned. */
5376 map
->p_type
= segment
->p_type
;
5377 map
->p_flags
= segment
->p_flags
;
5378 map
->p_flags_valid
= 1;
5379 map
->p_paddr
= suggested_lma
;
5380 map
->p_paddr_valid
= 1;
5381 map
->includes_filehdr
= 0;
5382 map
->includes_phdrs
= 0;
5385 while (isec
< section_count
);
5390 /* The Solaris linker creates program headers in which all the
5391 p_paddr fields are zero. When we try to objcopy or strip such a
5392 file, we get confused. Check for this case, and if we find it
5393 reset the p_paddr_valid fields. */
5394 for (map
= map_first
; map
!= NULL
; map
= map
->next
)
5395 if (map
->p_paddr
!= 0)
5398 for (map
= map_first
; map
!= NULL
; map
= map
->next
)
5399 map
->p_paddr_valid
= 0;
5401 elf_tdata (obfd
)->segment_map
= map_first
;
5403 /* If we had to estimate the number of program headers that were
5404 going to be needed, then check our estimate now and adjust
5405 the offset if necessary. */
5406 if (phdr_adjust_seg
!= NULL
)
5410 for (count
= 0, map
= map_first
; map
!= NULL
; map
= map
->next
)
5413 if (count
> phdr_adjust_num
)
5414 phdr_adjust_seg
->p_paddr
5415 -= (count
- phdr_adjust_num
) * iehdr
->e_phentsize
;
5419 /* Final Step: Sort the segments into ascending order of physical
5421 if (map_first
!= NULL
)
5423 struct elf_segment_map
*prev
;
5426 for (map
= map_first
->next
; map
!= NULL
; prev
= map
, map
= map
->next
)
5428 /* Yes I know - its a bubble sort.... */
5429 if (map
->next
!= NULL
&& (map
->next
->p_paddr
< map
->p_paddr
))
5431 /* Swap map and map->next. */
5432 prev
->next
= map
->next
;
5433 map
->next
= map
->next
->next
;
5434 prev
->next
->next
= map
;
5445 #undef IS_CONTAINED_BY_VMA
5446 #undef IS_CONTAINED_BY_LMA
5447 #undef IS_COREFILE_NOTE
5448 #undef IS_SOLARIS_PT_INTERP
5449 #undef INCLUDE_SECTION_IN_SEGMENT
5450 #undef SEGMENT_AFTER_SEGMENT
5451 #undef SEGMENT_OVERLAPS
5455 /* Copy private section information. This copies over the entsize
5456 field, and sometimes the info field. */
5459 _bfd_elf_copy_private_section_data (bfd
*ibfd
,
5464 Elf_Internal_Shdr
*ihdr
, *ohdr
;
5466 if (ibfd
->xvec
->flavour
!= bfd_target_elf_flavour
5467 || obfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
5470 ihdr
= &elf_section_data (isec
)->this_hdr
;
5471 ohdr
= &elf_section_data (osec
)->this_hdr
;
5473 ohdr
->sh_entsize
= ihdr
->sh_entsize
;
5475 if (ihdr
->sh_type
== SHT_SYMTAB
5476 || ihdr
->sh_type
== SHT_DYNSYM
5477 || ihdr
->sh_type
== SHT_GNU_verneed
5478 || ihdr
->sh_type
== SHT_GNU_verdef
)
5479 ohdr
->sh_info
= ihdr
->sh_info
;
5481 /* Set things up for objcopy. The output SHT_GROUP section will
5482 have its elf_next_in_group pointing back to the input group
5484 elf_next_in_group (osec
) = elf_next_in_group (isec
);
5485 elf_group_name (osec
) = elf_group_name (isec
);
5487 osec
->use_rela_p
= isec
->use_rela_p
;
5492 /* Copy private header information. */
5495 _bfd_elf_copy_private_header_data (bfd
*ibfd
, bfd
*obfd
)
5497 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
5498 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
5501 /* Copy over private BFD data if it has not already been copied.
5502 This must be done here, rather than in the copy_private_bfd_data
5503 entry point, because the latter is called after the section
5504 contents have been set, which means that the program headers have
5505 already been worked out. */
5506 if (elf_tdata (obfd
)->segment_map
== NULL
&& elf_tdata (ibfd
)->phdr
!= NULL
)
5508 if (! copy_private_bfd_data (ibfd
, obfd
))
5515 /* Copy private symbol information. If this symbol is in a section
5516 which we did not map into a BFD section, try to map the section
5517 index correctly. We use special macro definitions for the mapped
5518 section indices; these definitions are interpreted by the
5519 swap_out_syms function. */
5521 #define MAP_ONESYMTAB (SHN_HIOS + 1)
5522 #define MAP_DYNSYMTAB (SHN_HIOS + 2)
5523 #define MAP_STRTAB (SHN_HIOS + 3)
5524 #define MAP_SHSTRTAB (SHN_HIOS + 4)
5525 #define MAP_SYM_SHNDX (SHN_HIOS + 5)
5528 _bfd_elf_copy_private_symbol_data (bfd
*ibfd
,
5533 elf_symbol_type
*isym
, *osym
;
5535 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
5536 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
5539 isym
= elf_symbol_from (ibfd
, isymarg
);
5540 osym
= elf_symbol_from (obfd
, osymarg
);
5544 && bfd_is_abs_section (isym
->symbol
.section
))
5548 shndx
= isym
->internal_elf_sym
.st_shndx
;
5549 if (shndx
== elf_onesymtab (ibfd
))
5550 shndx
= MAP_ONESYMTAB
;
5551 else if (shndx
== elf_dynsymtab (ibfd
))
5552 shndx
= MAP_DYNSYMTAB
;
5553 else if (shndx
== elf_tdata (ibfd
)->strtab_section
)
5555 else if (shndx
== elf_tdata (ibfd
)->shstrtab_section
)
5556 shndx
= MAP_SHSTRTAB
;
5557 else if (shndx
== elf_tdata (ibfd
)->symtab_shndx_section
)
5558 shndx
= MAP_SYM_SHNDX
;
5559 osym
->internal_elf_sym
.st_shndx
= shndx
;
5565 /* Swap out the symbols. */
5568 swap_out_syms (bfd
*abfd
,
5569 struct bfd_strtab_hash
**sttp
,
5572 const struct elf_backend_data
*bed
;
5575 struct bfd_strtab_hash
*stt
;
5576 Elf_Internal_Shdr
*symtab_hdr
;
5577 Elf_Internal_Shdr
*symtab_shndx_hdr
;
5578 Elf_Internal_Shdr
*symstrtab_hdr
;
5579 char *outbound_syms
;
5580 char *outbound_shndx
;
5583 bfd_boolean name_local_sections
;
5585 if (!elf_map_symbols (abfd
))
5588 /* Dump out the symtabs. */
5589 stt
= _bfd_elf_stringtab_init ();
5593 bed
= get_elf_backend_data (abfd
);
5594 symcount
= bfd_get_symcount (abfd
);
5595 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
5596 symtab_hdr
->sh_type
= SHT_SYMTAB
;
5597 symtab_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
5598 symtab_hdr
->sh_size
= symtab_hdr
->sh_entsize
* (symcount
+ 1);
5599 symtab_hdr
->sh_info
= elf_num_locals (abfd
) + 1;
5600 symtab_hdr
->sh_addralign
= 1 << bed
->s
->log_file_align
;
5602 symstrtab_hdr
= &elf_tdata (abfd
)->strtab_hdr
;
5603 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
5605 amt
= (bfd_size_type
) (1 + symcount
) * bed
->s
->sizeof_sym
;
5606 outbound_syms
= bfd_alloc (abfd
, amt
);
5607 if (outbound_syms
== NULL
)
5609 _bfd_stringtab_free (stt
);
5612 symtab_hdr
->contents
= outbound_syms
;
5614 outbound_shndx
= NULL
;
5615 symtab_shndx_hdr
= &elf_tdata (abfd
)->symtab_shndx_hdr
;
5616 if (symtab_shndx_hdr
->sh_name
!= 0)
5618 amt
= (bfd_size_type
) (1 + symcount
) * sizeof (Elf_External_Sym_Shndx
);
5619 outbound_shndx
= bfd_zalloc (abfd
, amt
);
5620 if (outbound_shndx
== NULL
)
5622 _bfd_stringtab_free (stt
);
5626 symtab_shndx_hdr
->contents
= outbound_shndx
;
5627 symtab_shndx_hdr
->sh_type
= SHT_SYMTAB_SHNDX
;
5628 symtab_shndx_hdr
->sh_size
= amt
;
5629 symtab_shndx_hdr
->sh_addralign
= sizeof (Elf_External_Sym_Shndx
);
5630 symtab_shndx_hdr
->sh_entsize
= sizeof (Elf_External_Sym_Shndx
);
5633 /* Now generate the data (for "contents"). */
5635 /* Fill in zeroth symbol and swap it out. */
5636 Elf_Internal_Sym sym
;
5642 sym
.st_shndx
= SHN_UNDEF
;
5643 bed
->s
->swap_symbol_out (abfd
, &sym
, outbound_syms
, outbound_shndx
);
5644 outbound_syms
+= bed
->s
->sizeof_sym
;
5645 if (outbound_shndx
!= NULL
)
5646 outbound_shndx
+= sizeof (Elf_External_Sym_Shndx
);
5650 = (bed
->elf_backend_name_local_section_symbols
5651 && bed
->elf_backend_name_local_section_symbols (abfd
));
5653 syms
= bfd_get_outsymbols (abfd
);
5654 for (idx
= 0; idx
< symcount
; idx
++)
5656 Elf_Internal_Sym sym
;
5657 bfd_vma value
= syms
[idx
]->value
;
5658 elf_symbol_type
*type_ptr
;
5659 flagword flags
= syms
[idx
]->flags
;
5662 if (!name_local_sections
5663 && (flags
& (BSF_SECTION_SYM
| BSF_GLOBAL
)) == BSF_SECTION_SYM
)
5665 /* Local section symbols have no name. */
5670 sym
.st_name
= (unsigned long) _bfd_stringtab_add (stt
,
5673 if (sym
.st_name
== (unsigned long) -1)
5675 _bfd_stringtab_free (stt
);
5680 type_ptr
= elf_symbol_from (abfd
, syms
[idx
]);
5682 if ((flags
& BSF_SECTION_SYM
) == 0
5683 && bfd_is_com_section (syms
[idx
]->section
))
5685 /* ELF common symbols put the alignment into the `value' field,
5686 and the size into the `size' field. This is backwards from
5687 how BFD handles it, so reverse it here. */
5688 sym
.st_size
= value
;
5689 if (type_ptr
== NULL
5690 || type_ptr
->internal_elf_sym
.st_value
== 0)
5691 sym
.st_value
= value
>= 16 ? 16 : (1 << bfd_log2 (value
));
5693 sym
.st_value
= type_ptr
->internal_elf_sym
.st_value
;
5694 sym
.st_shndx
= _bfd_elf_section_from_bfd_section
5695 (abfd
, syms
[idx
]->section
);
5699 asection
*sec
= syms
[idx
]->section
;
5702 if (sec
->output_section
)
5704 value
+= sec
->output_offset
;
5705 sec
= sec
->output_section
;
5708 /* Don't add in the section vma for relocatable output. */
5709 if (! relocatable_p
)
5711 sym
.st_value
= value
;
5712 sym
.st_size
= type_ptr
? type_ptr
->internal_elf_sym
.st_size
: 0;
5714 if (bfd_is_abs_section (sec
)
5716 && type_ptr
->internal_elf_sym
.st_shndx
!= 0)
5718 /* This symbol is in a real ELF section which we did
5719 not create as a BFD section. Undo the mapping done
5720 by copy_private_symbol_data. */
5721 shndx
= type_ptr
->internal_elf_sym
.st_shndx
;
5725 shndx
= elf_onesymtab (abfd
);
5728 shndx
= elf_dynsymtab (abfd
);
5731 shndx
= elf_tdata (abfd
)->strtab_section
;
5734 shndx
= elf_tdata (abfd
)->shstrtab_section
;
5737 shndx
= elf_tdata (abfd
)->symtab_shndx_section
;
5745 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec
);
5751 /* Writing this would be a hell of a lot easier if
5752 we had some decent documentation on bfd, and
5753 knew what to expect of the library, and what to
5754 demand of applications. For example, it
5755 appears that `objcopy' might not set the
5756 section of a symbol to be a section that is
5757 actually in the output file. */
5758 sec2
= bfd_get_section_by_name (abfd
, sec
->name
);
5761 _bfd_error_handler (_("\
5762 Unable to find equivalent output section for symbol '%s' from section '%s'"),
5763 syms
[idx
]->name
? syms
[idx
]->name
: "<Local sym>",
5765 bfd_set_error (bfd_error_invalid_operation
);
5766 _bfd_stringtab_free (stt
);
5770 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec2
);
5771 BFD_ASSERT (shndx
!= -1);
5775 sym
.st_shndx
= shndx
;
5778 if ((flags
& BSF_THREAD_LOCAL
) != 0)
5780 else if ((flags
& BSF_FUNCTION
) != 0)
5782 else if ((flags
& BSF_OBJECT
) != 0)
5787 if (syms
[idx
]->section
->flags
& SEC_THREAD_LOCAL
)
5790 /* Processor-specific types. */
5791 if (type_ptr
!= NULL
5792 && bed
->elf_backend_get_symbol_type
)
5793 type
= ((*bed
->elf_backend_get_symbol_type
)
5794 (&type_ptr
->internal_elf_sym
, type
));
5796 if (flags
& BSF_SECTION_SYM
)
5798 if (flags
& BSF_GLOBAL
)
5799 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, STT_SECTION
);
5801 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_SECTION
);
5803 else if (bfd_is_com_section (syms
[idx
]->section
))
5804 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, type
);
5805 else if (bfd_is_und_section (syms
[idx
]->section
))
5806 sym
.st_info
= ELF_ST_INFO (((flags
& BSF_WEAK
)
5810 else if (flags
& BSF_FILE
)
5811 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FILE
);
5814 int bind
= STB_LOCAL
;
5816 if (flags
& BSF_LOCAL
)
5818 else if (flags
& BSF_WEAK
)
5820 else if (flags
& BSF_GLOBAL
)
5823 sym
.st_info
= ELF_ST_INFO (bind
, type
);
5826 if (type_ptr
!= NULL
)
5827 sym
.st_other
= type_ptr
->internal_elf_sym
.st_other
;
5831 bed
->s
->swap_symbol_out (abfd
, &sym
, outbound_syms
, outbound_shndx
);
5832 outbound_syms
+= bed
->s
->sizeof_sym
;
5833 if (outbound_shndx
!= NULL
)
5834 outbound_shndx
+= sizeof (Elf_External_Sym_Shndx
);
5838 symstrtab_hdr
->sh_size
= _bfd_stringtab_size (stt
);
5839 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
5841 symstrtab_hdr
->sh_flags
= 0;
5842 symstrtab_hdr
->sh_addr
= 0;
5843 symstrtab_hdr
->sh_entsize
= 0;
5844 symstrtab_hdr
->sh_link
= 0;
5845 symstrtab_hdr
->sh_info
= 0;
5846 symstrtab_hdr
->sh_addralign
= 1;
5851 /* Return the number of bytes required to hold the symtab vector.
5853 Note that we base it on the count plus 1, since we will null terminate
5854 the vector allocated based on this size. However, the ELF symbol table
5855 always has a dummy entry as symbol #0, so it ends up even. */
5858 _bfd_elf_get_symtab_upper_bound (bfd
*abfd
)
5862 Elf_Internal_Shdr
*hdr
= &elf_tdata (abfd
)->symtab_hdr
;
5864 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
5865 symtab_size
= (symcount
+ 1) * (sizeof (asymbol
*));
5867 symtab_size
-= sizeof (asymbol
*);
5873 _bfd_elf_get_dynamic_symtab_upper_bound (bfd
*abfd
)
5877 Elf_Internal_Shdr
*hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
5879 if (elf_dynsymtab (abfd
) == 0)
5881 bfd_set_error (bfd_error_invalid_operation
);
5885 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
5886 symtab_size
= (symcount
+ 1) * (sizeof (asymbol
*));
5888 symtab_size
-= sizeof (asymbol
*);
5894 _bfd_elf_get_reloc_upper_bound (bfd
*abfd ATTRIBUTE_UNUSED
,
5897 return (asect
->reloc_count
+ 1) * sizeof (arelent
*);
5900 /* Canonicalize the relocs. */
5903 _bfd_elf_canonicalize_reloc (bfd
*abfd
,
5910 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
5912 if (! bed
->s
->slurp_reloc_table (abfd
, section
, symbols
, FALSE
))
5915 tblptr
= section
->relocation
;
5916 for (i
= 0; i
< section
->reloc_count
; i
++)
5917 *relptr
++ = tblptr
++;
5921 return section
->reloc_count
;
5925 _bfd_elf_canonicalize_symtab (bfd
*abfd
, asymbol
**allocation
)
5927 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
5928 long symcount
= bed
->s
->slurp_symbol_table (abfd
, allocation
, FALSE
);
5931 bfd_get_symcount (abfd
) = symcount
;
5936 _bfd_elf_canonicalize_dynamic_symtab (bfd
*abfd
,
5937 asymbol
**allocation
)
5939 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
5940 long symcount
= bed
->s
->slurp_symbol_table (abfd
, allocation
, TRUE
);
5943 bfd_get_dynamic_symcount (abfd
) = symcount
;
5947 /* Return the size required for the dynamic reloc entries. Any
5948 section that was actually installed in the BFD, and has type
5949 SHT_REL or SHT_RELA, and uses the dynamic symbol table, is
5950 considered to be a dynamic reloc section. */
5953 _bfd_elf_get_dynamic_reloc_upper_bound (bfd
*abfd
)
5958 if (elf_dynsymtab (abfd
) == 0)
5960 bfd_set_error (bfd_error_invalid_operation
);
5964 ret
= sizeof (arelent
*);
5965 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
5966 if (elf_section_data (s
)->this_hdr
.sh_link
== elf_dynsymtab (abfd
)
5967 && (elf_section_data (s
)->this_hdr
.sh_type
== SHT_REL
5968 || elf_section_data (s
)->this_hdr
.sh_type
== SHT_RELA
))
5969 ret
+= ((s
->size
/ elf_section_data (s
)->this_hdr
.sh_entsize
)
5970 * sizeof (arelent
*));
5975 /* Canonicalize the dynamic relocation entries. Note that we return
5976 the dynamic relocations as a single block, although they are
5977 actually associated with particular sections; the interface, which
5978 was designed for SunOS style shared libraries, expects that there
5979 is only one set of dynamic relocs. Any section that was actually
5980 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses
5981 the dynamic symbol table, is considered to be a dynamic reloc
5985 _bfd_elf_canonicalize_dynamic_reloc (bfd
*abfd
,
5989 bfd_boolean (*slurp_relocs
) (bfd
*, asection
*, asymbol
**, bfd_boolean
);
5993 if (elf_dynsymtab (abfd
) == 0)
5995 bfd_set_error (bfd_error_invalid_operation
);
5999 slurp_relocs
= get_elf_backend_data (abfd
)->s
->slurp_reloc_table
;
6001 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
6003 if (elf_section_data (s
)->this_hdr
.sh_link
== elf_dynsymtab (abfd
)
6004 && (elf_section_data (s
)->this_hdr
.sh_type
== SHT_REL
6005 || elf_section_data (s
)->this_hdr
.sh_type
== SHT_RELA
))
6010 if (! (*slurp_relocs
) (abfd
, s
, syms
, TRUE
))
6012 count
= s
->size
/ elf_section_data (s
)->this_hdr
.sh_entsize
;
6014 for (i
= 0; i
< count
; i
++)
6025 /* Read in the version information. */
6028 _bfd_elf_slurp_version_tables (bfd
*abfd
)
6030 bfd_byte
*contents
= NULL
;
6033 if (elf_dynverdef (abfd
) != 0)
6035 Elf_Internal_Shdr
*hdr
;
6036 Elf_External_Verdef
*everdef
;
6037 Elf_Internal_Verdef
*iverdef
;
6038 Elf_Internal_Verdef
*iverdefarr
;
6039 Elf_Internal_Verdef iverdefmem
;
6041 unsigned int maxidx
;
6043 hdr
= &elf_tdata (abfd
)->dynverdef_hdr
;
6045 contents
= bfd_malloc (hdr
->sh_size
);
6046 if (contents
== NULL
)
6048 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
6049 || bfd_bread (contents
, hdr
->sh_size
, abfd
) != hdr
->sh_size
)
6052 /* We know the number of entries in the section but not the maximum
6053 index. Therefore we have to run through all entries and find
6055 everdef
= (Elf_External_Verdef
*) contents
;
6057 for (i
= 0; i
< hdr
->sh_info
; ++i
)
6059 _bfd_elf_swap_verdef_in (abfd
, everdef
, &iverdefmem
);
6061 if ((iverdefmem
.vd_ndx
& ((unsigned) VERSYM_VERSION
)) > maxidx
)
6062 maxidx
= iverdefmem
.vd_ndx
& ((unsigned) VERSYM_VERSION
);
6064 everdef
= ((Elf_External_Verdef
*)
6065 ((bfd_byte
*) everdef
+ iverdefmem
.vd_next
));
6068 amt
= (bfd_size_type
) maxidx
* sizeof (Elf_Internal_Verdef
);
6069 elf_tdata (abfd
)->verdef
= bfd_zalloc (abfd
, amt
);
6070 if (elf_tdata (abfd
)->verdef
== NULL
)
6073 elf_tdata (abfd
)->cverdefs
= maxidx
;
6075 everdef
= (Elf_External_Verdef
*) contents
;
6076 iverdefarr
= elf_tdata (abfd
)->verdef
;
6077 for (i
= 0; i
< hdr
->sh_info
; i
++)
6079 Elf_External_Verdaux
*everdaux
;
6080 Elf_Internal_Verdaux
*iverdaux
;
6083 _bfd_elf_swap_verdef_in (abfd
, everdef
, &iverdefmem
);
6085 iverdef
= &iverdefarr
[(iverdefmem
.vd_ndx
& VERSYM_VERSION
) - 1];
6086 memcpy (iverdef
, &iverdefmem
, sizeof (Elf_Internal_Verdef
));
6088 iverdef
->vd_bfd
= abfd
;
6090 amt
= (bfd_size_type
) iverdef
->vd_cnt
* sizeof (Elf_Internal_Verdaux
);
6091 iverdef
->vd_auxptr
= bfd_alloc (abfd
, amt
);
6092 if (iverdef
->vd_auxptr
== NULL
)
6095 everdaux
= ((Elf_External_Verdaux
*)
6096 ((bfd_byte
*) everdef
+ iverdef
->vd_aux
));
6097 iverdaux
= iverdef
->vd_auxptr
;
6098 for (j
= 0; j
< iverdef
->vd_cnt
; j
++, iverdaux
++)
6100 _bfd_elf_swap_verdaux_in (abfd
, everdaux
, iverdaux
);
6102 iverdaux
->vda_nodename
=
6103 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
6104 iverdaux
->vda_name
);
6105 if (iverdaux
->vda_nodename
== NULL
)
6108 if (j
+ 1 < iverdef
->vd_cnt
)
6109 iverdaux
->vda_nextptr
= iverdaux
+ 1;
6111 iverdaux
->vda_nextptr
= NULL
;
6113 everdaux
= ((Elf_External_Verdaux
*)
6114 ((bfd_byte
*) everdaux
+ iverdaux
->vda_next
));
6117 iverdef
->vd_nodename
= iverdef
->vd_auxptr
->vda_nodename
;
6119 if (i
+ 1 < hdr
->sh_info
)
6120 iverdef
->vd_nextdef
= iverdef
+ 1;
6122 iverdef
->vd_nextdef
= NULL
;
6124 everdef
= ((Elf_External_Verdef
*)
6125 ((bfd_byte
*) everdef
+ iverdef
->vd_next
));
6132 if (elf_dynverref (abfd
) != 0)
6134 Elf_Internal_Shdr
*hdr
;
6135 Elf_External_Verneed
*everneed
;
6136 Elf_Internal_Verneed
*iverneed
;
6139 hdr
= &elf_tdata (abfd
)->dynverref_hdr
;
6141 amt
= (bfd_size_type
) hdr
->sh_info
* sizeof (Elf_Internal_Verneed
);
6142 elf_tdata (abfd
)->verref
= bfd_zalloc (abfd
, amt
);
6143 if (elf_tdata (abfd
)->verref
== NULL
)
6146 elf_tdata (abfd
)->cverrefs
= hdr
->sh_info
;
6148 contents
= bfd_malloc (hdr
->sh_size
);
6149 if (contents
== NULL
)
6151 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
6152 || bfd_bread (contents
, hdr
->sh_size
, abfd
) != hdr
->sh_size
)
6155 everneed
= (Elf_External_Verneed
*) contents
;
6156 iverneed
= elf_tdata (abfd
)->verref
;
6157 for (i
= 0; i
< hdr
->sh_info
; i
++, iverneed
++)
6159 Elf_External_Vernaux
*evernaux
;
6160 Elf_Internal_Vernaux
*ivernaux
;
6163 _bfd_elf_swap_verneed_in (abfd
, everneed
, iverneed
);
6165 iverneed
->vn_bfd
= abfd
;
6167 iverneed
->vn_filename
=
6168 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
6170 if (iverneed
->vn_filename
== NULL
)
6173 amt
= iverneed
->vn_cnt
;
6174 amt
*= sizeof (Elf_Internal_Vernaux
);
6175 iverneed
->vn_auxptr
= bfd_alloc (abfd
, amt
);
6177 evernaux
= ((Elf_External_Vernaux
*)
6178 ((bfd_byte
*) everneed
+ iverneed
->vn_aux
));
6179 ivernaux
= iverneed
->vn_auxptr
;
6180 for (j
= 0; j
< iverneed
->vn_cnt
; j
++, ivernaux
++)
6182 _bfd_elf_swap_vernaux_in (abfd
, evernaux
, ivernaux
);
6184 ivernaux
->vna_nodename
=
6185 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
6186 ivernaux
->vna_name
);
6187 if (ivernaux
->vna_nodename
== NULL
)
6190 if (j
+ 1 < iverneed
->vn_cnt
)
6191 ivernaux
->vna_nextptr
= ivernaux
+ 1;
6193 ivernaux
->vna_nextptr
= NULL
;
6195 evernaux
= ((Elf_External_Vernaux
*)
6196 ((bfd_byte
*) evernaux
+ ivernaux
->vna_next
));
6199 if (i
+ 1 < hdr
->sh_info
)
6200 iverneed
->vn_nextref
= iverneed
+ 1;
6202 iverneed
->vn_nextref
= NULL
;
6204 everneed
= ((Elf_External_Verneed
*)
6205 ((bfd_byte
*) everneed
+ iverneed
->vn_next
));
6215 if (contents
!= NULL
)
6221 _bfd_elf_make_empty_symbol (bfd
*abfd
)
6223 elf_symbol_type
*newsym
;
6224 bfd_size_type amt
= sizeof (elf_symbol_type
);
6226 newsym
= bfd_zalloc (abfd
, amt
);
6231 newsym
->symbol
.the_bfd
= abfd
;
6232 return &newsym
->symbol
;
6237 _bfd_elf_get_symbol_info (bfd
*abfd ATTRIBUTE_UNUSED
,
6241 bfd_symbol_info (symbol
, ret
);
6244 /* Return whether a symbol name implies a local symbol. Most targets
6245 use this function for the is_local_label_name entry point, but some
6249 _bfd_elf_is_local_label_name (bfd
*abfd ATTRIBUTE_UNUSED
,
6252 /* Normal local symbols start with ``.L''. */
6253 if (name
[0] == '.' && name
[1] == 'L')
6256 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
6257 DWARF debugging symbols starting with ``..''. */
6258 if (name
[0] == '.' && name
[1] == '.')
6261 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
6262 emitting DWARF debugging output. I suspect this is actually a
6263 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
6264 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
6265 underscore to be emitted on some ELF targets). For ease of use,
6266 we treat such symbols as local. */
6267 if (name
[0] == '_' && name
[1] == '.' && name
[2] == 'L' && name
[3] == '_')
6274 _bfd_elf_get_lineno (bfd
*abfd ATTRIBUTE_UNUSED
,
6275 asymbol
*symbol ATTRIBUTE_UNUSED
)
6282 _bfd_elf_set_arch_mach (bfd
*abfd
,
6283 enum bfd_architecture arch
,
6284 unsigned long machine
)
6286 /* If this isn't the right architecture for this backend, and this
6287 isn't the generic backend, fail. */
6288 if (arch
!= get_elf_backend_data (abfd
)->arch
6289 && arch
!= bfd_arch_unknown
6290 && get_elf_backend_data (abfd
)->arch
!= bfd_arch_unknown
)
6293 return bfd_default_set_arch_mach (abfd
, arch
, machine
);
6296 /* Find the function to a particular section and offset,
6297 for error reporting. */
6300 elf_find_function (bfd
*abfd ATTRIBUTE_UNUSED
,
6304 const char **filename_ptr
,
6305 const char **functionname_ptr
)
6307 const char *filename
;
6316 for (p
= symbols
; *p
!= NULL
; p
++)
6320 q
= (elf_symbol_type
*) *p
;
6322 if (bfd_get_section (&q
->symbol
) != section
)
6325 switch (ELF_ST_TYPE (q
->internal_elf_sym
.st_info
))
6330 filename
= bfd_asymbol_name (&q
->symbol
);
6334 if (q
->symbol
.section
== section
6335 && q
->symbol
.value
>= low_func
6336 && q
->symbol
.value
<= offset
)
6338 func
= (asymbol
*) q
;
6339 low_func
= q
->symbol
.value
;
6349 *filename_ptr
= filename
;
6350 if (functionname_ptr
)
6351 *functionname_ptr
= bfd_asymbol_name (func
);
6356 /* Find the nearest line to a particular section and offset,
6357 for error reporting. */
6360 _bfd_elf_find_nearest_line (bfd
*abfd
,
6364 const char **filename_ptr
,
6365 const char **functionname_ptr
,
6366 unsigned int *line_ptr
)
6370 if (_bfd_dwarf1_find_nearest_line (abfd
, section
, symbols
, offset
,
6371 filename_ptr
, functionname_ptr
,
6374 if (!*functionname_ptr
)
6375 elf_find_function (abfd
, section
, symbols
, offset
,
6376 *filename_ptr
? NULL
: filename_ptr
,
6382 if (_bfd_dwarf2_find_nearest_line (abfd
, section
, symbols
, offset
,
6383 filename_ptr
, functionname_ptr
,
6385 &elf_tdata (abfd
)->dwarf2_find_line_info
))
6387 if (!*functionname_ptr
)
6388 elf_find_function (abfd
, section
, symbols
, offset
,
6389 *filename_ptr
? NULL
: filename_ptr
,
6395 if (! _bfd_stab_section_find_nearest_line (abfd
, symbols
, section
, offset
,
6396 &found
, filename_ptr
,
6397 functionname_ptr
, line_ptr
,
6398 &elf_tdata (abfd
)->line_info
))
6400 if (found
&& (*functionname_ptr
|| *line_ptr
))
6403 if (symbols
== NULL
)
6406 if (! elf_find_function (abfd
, section
, symbols
, offset
,
6407 filename_ptr
, functionname_ptr
))
6415 _bfd_elf_sizeof_headers (bfd
*abfd
, bfd_boolean reloc
)
6419 ret
= get_elf_backend_data (abfd
)->s
->sizeof_ehdr
;
6421 ret
+= get_program_header_size (abfd
);
6426 _bfd_elf_set_section_contents (bfd
*abfd
,
6428 const void *location
,
6430 bfd_size_type count
)
6432 Elf_Internal_Shdr
*hdr
;
6435 if (! abfd
->output_has_begun
6436 && ! _bfd_elf_compute_section_file_positions (abfd
, NULL
))
6439 hdr
= &elf_section_data (section
)->this_hdr
;
6440 pos
= hdr
->sh_offset
+ offset
;
6441 if (bfd_seek (abfd
, pos
, SEEK_SET
) != 0
6442 || bfd_bwrite (location
, count
, abfd
) != count
)
6449 _bfd_elf_no_info_to_howto (bfd
*abfd ATTRIBUTE_UNUSED
,
6450 arelent
*cache_ptr ATTRIBUTE_UNUSED
,
6451 Elf_Internal_Rela
*dst ATTRIBUTE_UNUSED
)
6456 /* Try to convert a non-ELF reloc into an ELF one. */
6459 _bfd_elf_validate_reloc (bfd
*abfd
, arelent
*areloc
)
6461 /* Check whether we really have an ELF howto. */
6463 if ((*areloc
->sym_ptr_ptr
)->the_bfd
->xvec
!= abfd
->xvec
)
6465 bfd_reloc_code_real_type code
;
6466 reloc_howto_type
*howto
;
6468 /* Alien reloc: Try to determine its type to replace it with an
6469 equivalent ELF reloc. */
6471 if (areloc
->howto
->pc_relative
)
6473 switch (areloc
->howto
->bitsize
)
6476 code
= BFD_RELOC_8_PCREL
;
6479 code
= BFD_RELOC_12_PCREL
;
6482 code
= BFD_RELOC_16_PCREL
;
6485 code
= BFD_RELOC_24_PCREL
;
6488 code
= BFD_RELOC_32_PCREL
;
6491 code
= BFD_RELOC_64_PCREL
;
6497 howto
= bfd_reloc_type_lookup (abfd
, code
);
6499 if (areloc
->howto
->pcrel_offset
!= howto
->pcrel_offset
)
6501 if (howto
->pcrel_offset
)
6502 areloc
->addend
+= areloc
->address
;
6504 areloc
->addend
-= areloc
->address
; /* addend is unsigned!! */
6509 switch (areloc
->howto
->bitsize
)
6515 code
= BFD_RELOC_14
;
6518 code
= BFD_RELOC_16
;
6521 code
= BFD_RELOC_26
;
6524 code
= BFD_RELOC_32
;
6527 code
= BFD_RELOC_64
;
6533 howto
= bfd_reloc_type_lookup (abfd
, code
);
6537 areloc
->howto
= howto
;
6545 (*_bfd_error_handler
)
6546 (_("%B: unsupported relocation type %s"),
6547 abfd
, areloc
->howto
->name
);
6548 bfd_set_error (bfd_error_bad_value
);
6553 _bfd_elf_close_and_cleanup (bfd
*abfd
)
6555 if (bfd_get_format (abfd
) == bfd_object
)
6557 if (elf_shstrtab (abfd
) != NULL
)
6558 _bfd_elf_strtab_free (elf_shstrtab (abfd
));
6561 return _bfd_generic_close_and_cleanup (abfd
);
6564 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
6565 in the relocation's offset. Thus we cannot allow any sort of sanity
6566 range-checking to interfere. There is nothing else to do in processing
6569 bfd_reloc_status_type
6570 _bfd_elf_rel_vtable_reloc_fn
6571 (bfd
*abfd ATTRIBUTE_UNUSED
, arelent
*re ATTRIBUTE_UNUSED
,
6572 struct bfd_symbol
*symbol ATTRIBUTE_UNUSED
,
6573 void *data ATTRIBUTE_UNUSED
, asection
*is ATTRIBUTE_UNUSED
,
6574 bfd
*obfd ATTRIBUTE_UNUSED
, char **errmsg ATTRIBUTE_UNUSED
)
6576 return bfd_reloc_ok
;
6579 /* Elf core file support. Much of this only works on native
6580 toolchains, since we rely on knowing the
6581 machine-dependent procfs structure in order to pick
6582 out details about the corefile. */
6584 #ifdef HAVE_SYS_PROCFS_H
6585 # include <sys/procfs.h>
6588 /* FIXME: this is kinda wrong, but it's what gdb wants. */
6591 elfcore_make_pid (bfd
*abfd
)
6593 return ((elf_tdata (abfd
)->core_lwpid
<< 16)
6594 + (elf_tdata (abfd
)->core_pid
));
6597 /* If there isn't a section called NAME, make one, using
6598 data from SECT. Note, this function will generate a
6599 reference to NAME, so you shouldn't deallocate or
6603 elfcore_maybe_make_sect (bfd
*abfd
, char *name
, asection
*sect
)
6607 if (bfd_get_section_by_name (abfd
, name
) != NULL
)
6610 sect2
= bfd_make_section (abfd
, name
);
6614 sect2
->size
= sect
->size
;
6615 sect2
->filepos
= sect
->filepos
;
6616 sect2
->flags
= sect
->flags
;
6617 sect2
->alignment_power
= sect
->alignment_power
;
6621 /* Create a pseudosection containing SIZE bytes at FILEPOS. This
6622 actually creates up to two pseudosections:
6623 - For the single-threaded case, a section named NAME, unless
6624 such a section already exists.
6625 - For the multi-threaded case, a section named "NAME/PID", where
6626 PID is elfcore_make_pid (abfd).
6627 Both pseudosections have identical contents. */
6629 _bfd_elfcore_make_pseudosection (bfd
*abfd
,
6635 char *threaded_name
;
6639 /* Build the section name. */
6641 sprintf (buf
, "%s/%d", name
, elfcore_make_pid (abfd
));
6642 len
= strlen (buf
) + 1;
6643 threaded_name
= bfd_alloc (abfd
, len
);
6644 if (threaded_name
== NULL
)
6646 memcpy (threaded_name
, buf
, len
);
6648 sect
= bfd_make_section_anyway (abfd
, threaded_name
);
6652 sect
->filepos
= filepos
;
6653 sect
->flags
= SEC_HAS_CONTENTS
;
6654 sect
->alignment_power
= 2;
6656 return elfcore_maybe_make_sect (abfd
, name
, sect
);
6659 /* prstatus_t exists on:
6661 linux 2.[01] + glibc
6665 #if defined (HAVE_PRSTATUS_T)
6668 elfcore_grok_prstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
6673 if (note
->descsz
== sizeof (prstatus_t
))
6677 size
= sizeof (prstat
.pr_reg
);
6678 offset
= offsetof (prstatus_t
, pr_reg
);
6679 memcpy (&prstat
, note
->descdata
, sizeof (prstat
));
6681 /* Do not overwrite the core signal if it
6682 has already been set by another thread. */
6683 if (elf_tdata (abfd
)->core_signal
== 0)
6684 elf_tdata (abfd
)->core_signal
= prstat
.pr_cursig
;
6685 elf_tdata (abfd
)->core_pid
= prstat
.pr_pid
;
6687 /* pr_who exists on:
6690 pr_who doesn't exist on:
6693 #if defined (HAVE_PRSTATUS_T_PR_WHO)
6694 elf_tdata (abfd
)->core_lwpid
= prstat
.pr_who
;
6697 #if defined (HAVE_PRSTATUS32_T)
6698 else if (note
->descsz
== sizeof (prstatus32_t
))
6700 /* 64-bit host, 32-bit corefile */
6701 prstatus32_t prstat
;
6703 size
= sizeof (prstat
.pr_reg
);
6704 offset
= offsetof (prstatus32_t
, pr_reg
);
6705 memcpy (&prstat
, note
->descdata
, sizeof (prstat
));
6707 /* Do not overwrite the core signal if it
6708 has already been set by another thread. */
6709 if (elf_tdata (abfd
)->core_signal
== 0)
6710 elf_tdata (abfd
)->core_signal
= prstat
.pr_cursig
;
6711 elf_tdata (abfd
)->core_pid
= prstat
.pr_pid
;
6713 /* pr_who exists on:
6716 pr_who doesn't exist on:
6719 #if defined (HAVE_PRSTATUS32_T_PR_WHO)
6720 elf_tdata (abfd
)->core_lwpid
= prstat
.pr_who
;
6723 #endif /* HAVE_PRSTATUS32_T */
6726 /* Fail - we don't know how to handle any other
6727 note size (ie. data object type). */
6731 /* Make a ".reg/999" section and a ".reg" section. */
6732 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
6733 size
, note
->descpos
+ offset
);
6735 #endif /* defined (HAVE_PRSTATUS_T) */
6737 /* Create a pseudosection containing the exact contents of NOTE. */
6739 elfcore_make_note_pseudosection (bfd
*abfd
,
6741 Elf_Internal_Note
*note
)
6743 return _bfd_elfcore_make_pseudosection (abfd
, name
,
6744 note
->descsz
, note
->descpos
);
6747 /* There isn't a consistent prfpregset_t across platforms,
6748 but it doesn't matter, because we don't have to pick this
6749 data structure apart. */
6752 elfcore_grok_prfpreg (bfd
*abfd
, Elf_Internal_Note
*note
)
6754 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
6757 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
6758 type of 5 (NT_PRXFPREG). Just include the whole note's contents
6762 elfcore_grok_prxfpreg (bfd
*abfd
, Elf_Internal_Note
*note
)
6764 return elfcore_make_note_pseudosection (abfd
, ".reg-xfp", note
);
6767 #if defined (HAVE_PRPSINFO_T)
6768 typedef prpsinfo_t elfcore_psinfo_t
;
6769 #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
6770 typedef prpsinfo32_t elfcore_psinfo32_t
;
6774 #if defined (HAVE_PSINFO_T)
6775 typedef psinfo_t elfcore_psinfo_t
;
6776 #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
6777 typedef psinfo32_t elfcore_psinfo32_t
;
6781 /* return a malloc'ed copy of a string at START which is at
6782 most MAX bytes long, possibly without a terminating '\0'.
6783 the copy will always have a terminating '\0'. */
6786 _bfd_elfcore_strndup (bfd
*abfd
, char *start
, size_t max
)
6789 char *end
= memchr (start
, '\0', max
);
6797 dups
= bfd_alloc (abfd
, len
+ 1);
6801 memcpy (dups
, start
, len
);
6807 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
6809 elfcore_grok_psinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
6811 if (note
->descsz
== sizeof (elfcore_psinfo_t
))
6813 elfcore_psinfo_t psinfo
;
6815 memcpy (&psinfo
, note
->descdata
, sizeof (psinfo
));
6817 elf_tdata (abfd
)->core_program
6818 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_fname
,
6819 sizeof (psinfo
.pr_fname
));
6821 elf_tdata (abfd
)->core_command
6822 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_psargs
,
6823 sizeof (psinfo
.pr_psargs
));
6825 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
6826 else if (note
->descsz
== sizeof (elfcore_psinfo32_t
))
6828 /* 64-bit host, 32-bit corefile */
6829 elfcore_psinfo32_t psinfo
;
6831 memcpy (&psinfo
, note
->descdata
, sizeof (psinfo
));
6833 elf_tdata (abfd
)->core_program
6834 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_fname
,
6835 sizeof (psinfo
.pr_fname
));
6837 elf_tdata (abfd
)->core_command
6838 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_psargs
,
6839 sizeof (psinfo
.pr_psargs
));
6845 /* Fail - we don't know how to handle any other
6846 note size (ie. data object type). */
6850 /* Note that for some reason, a spurious space is tacked
6851 onto the end of the args in some (at least one anyway)
6852 implementations, so strip it off if it exists. */
6855 char *command
= elf_tdata (abfd
)->core_command
;
6856 int n
= strlen (command
);
6858 if (0 < n
&& command
[n
- 1] == ' ')
6859 command
[n
- 1] = '\0';
6864 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
6866 #if defined (HAVE_PSTATUS_T)
6868 elfcore_grok_pstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
6870 if (note
->descsz
== sizeof (pstatus_t
)
6871 #if defined (HAVE_PXSTATUS_T)
6872 || note
->descsz
== sizeof (pxstatus_t
)
6878 memcpy (&pstat
, note
->descdata
, sizeof (pstat
));
6880 elf_tdata (abfd
)->core_pid
= pstat
.pr_pid
;
6882 #if defined (HAVE_PSTATUS32_T)
6883 else if (note
->descsz
== sizeof (pstatus32_t
))
6885 /* 64-bit host, 32-bit corefile */
6888 memcpy (&pstat
, note
->descdata
, sizeof (pstat
));
6890 elf_tdata (abfd
)->core_pid
= pstat
.pr_pid
;
6893 /* Could grab some more details from the "representative"
6894 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
6895 NT_LWPSTATUS note, presumably. */
6899 #endif /* defined (HAVE_PSTATUS_T) */
6901 #if defined (HAVE_LWPSTATUS_T)
6903 elfcore_grok_lwpstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
6905 lwpstatus_t lwpstat
;
6911 if (note
->descsz
!= sizeof (lwpstat
)
6912 #if defined (HAVE_LWPXSTATUS_T)
6913 && note
->descsz
!= sizeof (lwpxstatus_t
)
6918 memcpy (&lwpstat
, note
->descdata
, sizeof (lwpstat
));
6920 elf_tdata (abfd
)->core_lwpid
= lwpstat
.pr_lwpid
;
6921 elf_tdata (abfd
)->core_signal
= lwpstat
.pr_cursig
;
6923 /* Make a ".reg/999" section. */
6925 sprintf (buf
, ".reg/%d", elfcore_make_pid (abfd
));
6926 len
= strlen (buf
) + 1;
6927 name
= bfd_alloc (abfd
, len
);
6930 memcpy (name
, buf
, len
);
6932 sect
= bfd_make_section_anyway (abfd
, name
);
6936 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
6937 sect
->size
= sizeof (lwpstat
.pr_context
.uc_mcontext
.gregs
);
6938 sect
->filepos
= note
->descpos
6939 + offsetof (lwpstatus_t
, pr_context
.uc_mcontext
.gregs
);
6942 #if defined (HAVE_LWPSTATUS_T_PR_REG)
6943 sect
->size
= sizeof (lwpstat
.pr_reg
);
6944 sect
->filepos
= note
->descpos
+ offsetof (lwpstatus_t
, pr_reg
);
6947 sect
->flags
= SEC_HAS_CONTENTS
;
6948 sect
->alignment_power
= 2;
6950 if (!elfcore_maybe_make_sect (abfd
, ".reg", sect
))
6953 /* Make a ".reg2/999" section */
6955 sprintf (buf
, ".reg2/%d", elfcore_make_pid (abfd
));
6956 len
= strlen (buf
) + 1;
6957 name
= bfd_alloc (abfd
, len
);
6960 memcpy (name
, buf
, len
);
6962 sect
= bfd_make_section_anyway (abfd
, name
);
6966 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
6967 sect
->size
= sizeof (lwpstat
.pr_context
.uc_mcontext
.fpregs
);
6968 sect
->filepos
= note
->descpos
6969 + offsetof (lwpstatus_t
, pr_context
.uc_mcontext
.fpregs
);
6972 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
6973 sect
->size
= sizeof (lwpstat
.pr_fpreg
);
6974 sect
->filepos
= note
->descpos
+ offsetof (lwpstatus_t
, pr_fpreg
);
6977 sect
->flags
= SEC_HAS_CONTENTS
;
6978 sect
->alignment_power
= 2;
6980 return elfcore_maybe_make_sect (abfd
, ".reg2", sect
);
6982 #endif /* defined (HAVE_LWPSTATUS_T) */
6984 #if defined (HAVE_WIN32_PSTATUS_T)
6986 elfcore_grok_win32pstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
6992 win32_pstatus_t pstatus
;
6994 if (note
->descsz
< sizeof (pstatus
))
6997 memcpy (&pstatus
, note
->descdata
, sizeof (pstatus
));
6999 switch (pstatus
.data_type
)
7001 case NOTE_INFO_PROCESS
:
7002 /* FIXME: need to add ->core_command. */
7003 elf_tdata (abfd
)->core_signal
= pstatus
.data
.process_info
.signal
;
7004 elf_tdata (abfd
)->core_pid
= pstatus
.data
.process_info
.pid
;
7007 case NOTE_INFO_THREAD
:
7008 /* Make a ".reg/999" section. */
7009 sprintf (buf
, ".reg/%d", pstatus
.data
.thread_info
.tid
);
7011 len
= strlen (buf
) + 1;
7012 name
= bfd_alloc (abfd
, len
);
7016 memcpy (name
, buf
, len
);
7018 sect
= bfd_make_section_anyway (abfd
, name
);
7022 sect
->size
= sizeof (pstatus
.data
.thread_info
.thread_context
);
7023 sect
->filepos
= (note
->descpos
7024 + offsetof (struct win32_pstatus
,
7025 data
.thread_info
.thread_context
));
7026 sect
->flags
= SEC_HAS_CONTENTS
;
7027 sect
->alignment_power
= 2;
7029 if (pstatus
.data
.thread_info
.is_active_thread
)
7030 if (! elfcore_maybe_make_sect (abfd
, ".reg", sect
))
7034 case NOTE_INFO_MODULE
:
7035 /* Make a ".module/xxxxxxxx" section. */
7036 sprintf (buf
, ".module/%08x", pstatus
.data
.module_info
.base_address
);
7038 len
= strlen (buf
) + 1;
7039 name
= bfd_alloc (abfd
, len
);
7043 memcpy (name
, buf
, len
);
7045 sect
= bfd_make_section_anyway (abfd
, name
);
7050 sect
->size
= note
->descsz
;
7051 sect
->filepos
= note
->descpos
;
7052 sect
->flags
= SEC_HAS_CONTENTS
;
7053 sect
->alignment_power
= 2;
7062 #endif /* HAVE_WIN32_PSTATUS_T */
7065 elfcore_grok_note (bfd
*abfd
, Elf_Internal_Note
*note
)
7067 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
7075 if (bed
->elf_backend_grok_prstatus
)
7076 if ((*bed
->elf_backend_grok_prstatus
) (abfd
, note
))
7078 #if defined (HAVE_PRSTATUS_T)
7079 return elfcore_grok_prstatus (abfd
, note
);
7084 #if defined (HAVE_PSTATUS_T)
7086 return elfcore_grok_pstatus (abfd
, note
);
7089 #if defined (HAVE_LWPSTATUS_T)
7091 return elfcore_grok_lwpstatus (abfd
, note
);
7094 case NT_FPREGSET
: /* FIXME: rename to NT_PRFPREG */
7095 return elfcore_grok_prfpreg (abfd
, note
);
7097 #if defined (HAVE_WIN32_PSTATUS_T)
7098 case NT_WIN32PSTATUS
:
7099 return elfcore_grok_win32pstatus (abfd
, note
);
7102 case NT_PRXFPREG
: /* Linux SSE extension */
7103 if (note
->namesz
== 6
7104 && strcmp (note
->namedata
, "LINUX") == 0)
7105 return elfcore_grok_prxfpreg (abfd
, note
);
7111 if (bed
->elf_backend_grok_psinfo
)
7112 if ((*bed
->elf_backend_grok_psinfo
) (abfd
, note
))
7114 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7115 return elfcore_grok_psinfo (abfd
, note
);
7122 asection
*sect
= bfd_make_section_anyway (abfd
, ".auxv");
7126 sect
->size
= note
->descsz
;
7127 sect
->filepos
= note
->descpos
;
7128 sect
->flags
= SEC_HAS_CONTENTS
;
7129 sect
->alignment_power
= 1 + bfd_get_arch_size (abfd
) / 32;
7137 elfcore_netbsd_get_lwpid (Elf_Internal_Note
*note
, int *lwpidp
)
7141 cp
= strchr (note
->namedata
, '@');
7144 *lwpidp
= atoi(cp
+ 1);
7151 elfcore_grok_netbsd_procinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
7154 /* Signal number at offset 0x08. */
7155 elf_tdata (abfd
)->core_signal
7156 = bfd_h_get_32 (abfd
, (bfd_byte
*) note
->descdata
+ 0x08);
7158 /* Process ID at offset 0x50. */
7159 elf_tdata (abfd
)->core_pid
7160 = bfd_h_get_32 (abfd
, (bfd_byte
*) note
->descdata
+ 0x50);
7162 /* Command name at 0x7c (max 32 bytes, including nul). */
7163 elf_tdata (abfd
)->core_command
7164 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 0x7c, 31);
7166 return elfcore_make_note_pseudosection (abfd
, ".note.netbsdcore.procinfo",
7171 elfcore_grok_netbsd_note (bfd
*abfd
, Elf_Internal_Note
*note
)
7175 if (elfcore_netbsd_get_lwpid (note
, &lwp
))
7176 elf_tdata (abfd
)->core_lwpid
= lwp
;
7178 if (note
->type
== NT_NETBSDCORE_PROCINFO
)
7180 /* NetBSD-specific core "procinfo". Note that we expect to
7181 find this note before any of the others, which is fine,
7182 since the kernel writes this note out first when it
7183 creates a core file. */
7185 return elfcore_grok_netbsd_procinfo (abfd
, note
);
7188 /* As of Jan 2002 there are no other machine-independent notes
7189 defined for NetBSD core files. If the note type is less
7190 than the start of the machine-dependent note types, we don't
7193 if (note
->type
< NT_NETBSDCORE_FIRSTMACH
)
7197 switch (bfd_get_arch (abfd
))
7199 /* On the Alpha, SPARC (32-bit and 64-bit), PT_GETREGS == mach+0 and
7200 PT_GETFPREGS == mach+2. */
7202 case bfd_arch_alpha
:
7203 case bfd_arch_sparc
:
7206 case NT_NETBSDCORE_FIRSTMACH
+0:
7207 return elfcore_make_note_pseudosection (abfd
, ".reg", note
);
7209 case NT_NETBSDCORE_FIRSTMACH
+2:
7210 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
7216 /* On all other arch's, PT_GETREGS == mach+1 and
7217 PT_GETFPREGS == mach+3. */
7222 case NT_NETBSDCORE_FIRSTMACH
+1:
7223 return elfcore_make_note_pseudosection (abfd
, ".reg", note
);
7225 case NT_NETBSDCORE_FIRSTMACH
+3:
7226 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
7236 elfcore_grok_nto_status (bfd
*abfd
, Elf_Internal_Note
*note
, pid_t
*tid
)
7238 void *ddata
= note
->descdata
;
7245 /* nto_procfs_status 'pid' field is at offset 0. */
7246 elf_tdata (abfd
)->core_pid
= bfd_get_32 (abfd
, (bfd_byte
*) ddata
);
7248 /* nto_procfs_status 'tid' field is at offset 4. Pass it back. */
7249 *tid
= bfd_get_32 (abfd
, (bfd_byte
*) ddata
+ 4);
7251 /* nto_procfs_status 'flags' field is at offset 8. */
7252 flags
= bfd_get_32 (abfd
, (bfd_byte
*) ddata
+ 8);
7254 /* nto_procfs_status 'what' field is at offset 14. */
7255 if ((sig
= bfd_get_16 (abfd
, (bfd_byte
*) ddata
+ 14)) > 0)
7257 elf_tdata (abfd
)->core_signal
= sig
;
7258 elf_tdata (abfd
)->core_lwpid
= *tid
;
7261 /* _DEBUG_FLAG_CURTID (current thread) is 0x80. Some cores
7262 do not come from signals so we make sure we set the current
7263 thread just in case. */
7264 if (flags
& 0x00000080)
7265 elf_tdata (abfd
)->core_lwpid
= *tid
;
7267 /* Make a ".qnx_core_status/%d" section. */
7268 sprintf (buf
, ".qnx_core_status/%d", *tid
);
7270 name
= bfd_alloc (abfd
, strlen (buf
) + 1);
7275 sect
= bfd_make_section_anyway (abfd
, name
);
7279 sect
->size
= note
->descsz
;
7280 sect
->filepos
= note
->descpos
;
7281 sect
->flags
= SEC_HAS_CONTENTS
;
7282 sect
->alignment_power
= 2;
7284 return (elfcore_maybe_make_sect (abfd
, ".qnx_core_status", sect
));
7288 elfcore_grok_nto_gregs (bfd
*abfd
, Elf_Internal_Note
*note
, pid_t tid
)
7294 /* Make a ".reg/%d" section. */
7295 sprintf (buf
, ".reg/%d", tid
);
7297 name
= bfd_alloc (abfd
, strlen (buf
) + 1);
7302 sect
= bfd_make_section_anyway (abfd
, name
);
7306 sect
->size
= note
->descsz
;
7307 sect
->filepos
= note
->descpos
;
7308 sect
->flags
= SEC_HAS_CONTENTS
;
7309 sect
->alignment_power
= 2;
7311 /* This is the current thread. */
7312 if (elf_tdata (abfd
)->core_lwpid
== tid
)
7313 return elfcore_maybe_make_sect (abfd
, ".reg", sect
);
7318 #define BFD_QNT_CORE_INFO 7
7319 #define BFD_QNT_CORE_STATUS 8
7320 #define BFD_QNT_CORE_GREG 9
7321 #define BFD_QNT_CORE_FPREG 10
7324 elfcore_grok_nto_note (bfd
*abfd
, Elf_Internal_Note
*note
)
7326 /* Every GREG section has a STATUS section before it. Store the
7327 tid from the previous call to pass down to the next gregs
7329 static pid_t tid
= 1;
7333 case BFD_QNT_CORE_INFO
: return elfcore_make_note_pseudosection (abfd
, ".qnx_core_info", note
);
7334 case BFD_QNT_CORE_STATUS
: return elfcore_grok_nto_status (abfd
, note
, &tid
);
7335 case BFD_QNT_CORE_GREG
: return elfcore_grok_nto_gregs (abfd
, note
, tid
);
7336 case BFD_QNT_CORE_FPREG
: return elfcore_grok_prfpreg (abfd
, note
);
7337 default: return TRUE
;
7341 /* Function: elfcore_write_note
7348 size of data for note
7351 End of buffer containing note. */
7354 elfcore_write_note (bfd
*abfd
,
7362 Elf_External_Note
*xnp
;
7372 const struct elf_backend_data
*bed
;
7374 namesz
= strlen (name
) + 1;
7375 bed
= get_elf_backend_data (abfd
);
7376 pad
= -namesz
& ((1 << bed
->s
->log_file_align
) - 1);
7379 newspace
= 12 + namesz
+ pad
+ size
;
7381 p
= realloc (buf
, *bufsiz
+ newspace
);
7383 *bufsiz
+= newspace
;
7384 xnp
= (Elf_External_Note
*) dest
;
7385 H_PUT_32 (abfd
, namesz
, xnp
->namesz
);
7386 H_PUT_32 (abfd
, size
, xnp
->descsz
);
7387 H_PUT_32 (abfd
, type
, xnp
->type
);
7391 memcpy (dest
, name
, namesz
);
7399 memcpy (dest
, input
, size
);
7403 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7405 elfcore_write_prpsinfo (bfd
*abfd
,
7412 char *note_name
= "CORE";
7414 #if defined (HAVE_PSINFO_T)
7416 note_type
= NT_PSINFO
;
7419 note_type
= NT_PRPSINFO
;
7422 memset (&data
, 0, sizeof (data
));
7423 strncpy (data
.pr_fname
, fname
, sizeof (data
.pr_fname
));
7424 strncpy (data
.pr_psargs
, psargs
, sizeof (data
.pr_psargs
));
7425 return elfcore_write_note (abfd
, buf
, bufsiz
,
7426 note_name
, note_type
, &data
, sizeof (data
));
7428 #endif /* PSINFO_T or PRPSINFO_T */
7430 #if defined (HAVE_PRSTATUS_T)
7432 elfcore_write_prstatus (bfd
*abfd
,
7440 char *note_name
= "CORE";
7442 memset (&prstat
, 0, sizeof (prstat
));
7443 prstat
.pr_pid
= pid
;
7444 prstat
.pr_cursig
= cursig
;
7445 memcpy (&prstat
.pr_reg
, gregs
, sizeof (prstat
.pr_reg
));
7446 return elfcore_write_note (abfd
, buf
, bufsiz
,
7447 note_name
, NT_PRSTATUS
, &prstat
, sizeof (prstat
));
7449 #endif /* HAVE_PRSTATUS_T */
7451 #if defined (HAVE_LWPSTATUS_T)
7453 elfcore_write_lwpstatus (bfd
*abfd
,
7460 lwpstatus_t lwpstat
;
7461 char *note_name
= "CORE";
7463 memset (&lwpstat
, 0, sizeof (lwpstat
));
7464 lwpstat
.pr_lwpid
= pid
>> 16;
7465 lwpstat
.pr_cursig
= cursig
;
7466 #if defined (HAVE_LWPSTATUS_T_PR_REG)
7467 memcpy (lwpstat
.pr_reg
, gregs
, sizeof (lwpstat
.pr_reg
));
7468 #elif defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7470 memcpy (lwpstat
.pr_context
.uc_mcontext
.gregs
,
7471 gregs
, sizeof (lwpstat
.pr_context
.uc_mcontext
.gregs
));
7473 memcpy (lwpstat
.pr_context
.uc_mcontext
.__gregs
,
7474 gregs
, sizeof (lwpstat
.pr_context
.uc_mcontext
.__gregs
));
7477 return elfcore_write_note (abfd
, buf
, bufsiz
, note_name
,
7478 NT_LWPSTATUS
, &lwpstat
, sizeof (lwpstat
));
7480 #endif /* HAVE_LWPSTATUS_T */
7482 #if defined (HAVE_PSTATUS_T)
7484 elfcore_write_pstatus (bfd
*abfd
,
7492 char *note_name
= "CORE";
7494 memset (&pstat
, 0, sizeof (pstat
));
7495 pstat
.pr_pid
= pid
& 0xffff;
7496 buf
= elfcore_write_note (abfd
, buf
, bufsiz
, note_name
,
7497 NT_PSTATUS
, &pstat
, sizeof (pstat
));
7500 #endif /* HAVE_PSTATUS_T */
7503 elfcore_write_prfpreg (bfd
*abfd
,
7509 char *note_name
= "CORE";
7510 return elfcore_write_note (abfd
, buf
, bufsiz
,
7511 note_name
, NT_FPREGSET
, fpregs
, size
);
7515 elfcore_write_prxfpreg (bfd
*abfd
,
7518 const void *xfpregs
,
7521 char *note_name
= "LINUX";
7522 return elfcore_write_note (abfd
, buf
, bufsiz
,
7523 note_name
, NT_PRXFPREG
, xfpregs
, size
);
7527 elfcore_read_notes (bfd
*abfd
, file_ptr offset
, bfd_size_type size
)
7535 if (bfd_seek (abfd
, offset
, SEEK_SET
) != 0)
7538 buf
= bfd_malloc (size
);
7542 if (bfd_bread (buf
, size
, abfd
) != size
)
7550 while (p
< buf
+ size
)
7552 /* FIXME: bad alignment assumption. */
7553 Elf_External_Note
*xnp
= (Elf_External_Note
*) p
;
7554 Elf_Internal_Note in
;
7556 in
.type
= H_GET_32 (abfd
, xnp
->type
);
7558 in
.namesz
= H_GET_32 (abfd
, xnp
->namesz
);
7559 in
.namedata
= xnp
->name
;
7561 in
.descsz
= H_GET_32 (abfd
, xnp
->descsz
);
7562 in
.descdata
= in
.namedata
+ BFD_ALIGN (in
.namesz
, 4);
7563 in
.descpos
= offset
+ (in
.descdata
- buf
);
7565 if (strncmp (in
.namedata
, "NetBSD-CORE", 11) == 0)
7567 if (! elfcore_grok_netbsd_note (abfd
, &in
))
7570 else if (strncmp (in
.namedata
, "QNX", 3) == 0)
7572 if (! elfcore_grok_nto_note (abfd
, &in
))
7577 if (! elfcore_grok_note (abfd
, &in
))
7581 p
= in
.descdata
+ BFD_ALIGN (in
.descsz
, 4);
7588 /* Providing external access to the ELF program header table. */
7590 /* Return an upper bound on the number of bytes required to store a
7591 copy of ABFD's program header table entries. Return -1 if an error
7592 occurs; bfd_get_error will return an appropriate code. */
7595 bfd_get_elf_phdr_upper_bound (bfd
*abfd
)
7597 if (abfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
7599 bfd_set_error (bfd_error_wrong_format
);
7603 return elf_elfheader (abfd
)->e_phnum
* sizeof (Elf_Internal_Phdr
);
7606 /* Copy ABFD's program header table entries to *PHDRS. The entries
7607 will be stored as an array of Elf_Internal_Phdr structures, as
7608 defined in include/elf/internal.h. To find out how large the
7609 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
7611 Return the number of program header table entries read, or -1 if an
7612 error occurs; bfd_get_error will return an appropriate code. */
7615 bfd_get_elf_phdrs (bfd
*abfd
, void *phdrs
)
7619 if (abfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
7621 bfd_set_error (bfd_error_wrong_format
);
7625 num_phdrs
= elf_elfheader (abfd
)->e_phnum
;
7626 memcpy (phdrs
, elf_tdata (abfd
)->phdr
,
7627 num_phdrs
* sizeof (Elf_Internal_Phdr
));
7633 _bfd_elf_sprintf_vma (bfd
*abfd ATTRIBUTE_UNUSED
, char *buf
, bfd_vma value
)
7636 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
7638 i_ehdrp
= elf_elfheader (abfd
);
7639 if (i_ehdrp
== NULL
)
7640 sprintf_vma (buf
, value
);
7643 if (i_ehdrp
->e_ident
[EI_CLASS
] == ELFCLASS64
)
7645 #if BFD_HOST_64BIT_LONG
7646 sprintf (buf
, "%016lx", value
);
7648 sprintf (buf
, "%08lx%08lx", _bfd_int64_high (value
),
7649 _bfd_int64_low (value
));
7653 sprintf (buf
, "%08lx", (unsigned long) (value
& 0xffffffff));
7656 sprintf_vma (buf
, value
);
7661 _bfd_elf_fprintf_vma (bfd
*abfd ATTRIBUTE_UNUSED
, void *stream
, bfd_vma value
)
7664 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
7666 i_ehdrp
= elf_elfheader (abfd
);
7667 if (i_ehdrp
== NULL
)
7668 fprintf_vma ((FILE *) stream
, value
);
7671 if (i_ehdrp
->e_ident
[EI_CLASS
] == ELFCLASS64
)
7673 #if BFD_HOST_64BIT_LONG
7674 fprintf ((FILE *) stream
, "%016lx", value
);
7676 fprintf ((FILE *) stream
, "%08lx%08lx",
7677 _bfd_int64_high (value
), _bfd_int64_low (value
));
7681 fprintf ((FILE *) stream
, "%08lx",
7682 (unsigned long) (value
& 0xffffffff));
7685 fprintf_vma ((FILE *) stream
, value
);
7689 enum elf_reloc_type_class
7690 _bfd_elf_reloc_type_class (const Elf_Internal_Rela
*rela ATTRIBUTE_UNUSED
)
7692 return reloc_class_normal
;
7695 /* For RELA architectures, return the relocation value for a
7696 relocation against a local symbol. */
7699 _bfd_elf_rela_local_sym (bfd
*abfd
,
7700 Elf_Internal_Sym
*sym
,
7702 Elf_Internal_Rela
*rel
)
7704 asection
*sec
= *psec
;
7707 relocation
= (sec
->output_section
->vma
7708 + sec
->output_offset
7710 if ((sec
->flags
& SEC_MERGE
)
7711 && ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
7712 && sec
->sec_info_type
== ELF_INFO_TYPE_MERGE
)
7715 _bfd_merged_section_offset (abfd
, psec
,
7716 elf_section_data (sec
)->sec_info
,
7717 sym
->st_value
+ rel
->r_addend
);
7720 /* If we have changed the section, and our original section is
7721 marked with SEC_EXCLUDE, it means that the original
7722 SEC_MERGE section has been completely subsumed in some
7723 other SEC_MERGE section. In this case, we need to leave
7724 some info around for --emit-relocs. */
7725 if ((sec
->flags
& SEC_EXCLUDE
) != 0)
7726 sec
->kept_section
= *psec
;
7729 rel
->r_addend
-= relocation
;
7730 rel
->r_addend
+= sec
->output_section
->vma
+ sec
->output_offset
;
7736 _bfd_elf_rel_local_sym (bfd
*abfd
,
7737 Elf_Internal_Sym
*sym
,
7741 asection
*sec
= *psec
;
7743 if (sec
->sec_info_type
!= ELF_INFO_TYPE_MERGE
)
7744 return sym
->st_value
+ addend
;
7746 return _bfd_merged_section_offset (abfd
, psec
,
7747 elf_section_data (sec
)->sec_info
,
7748 sym
->st_value
+ addend
);
7752 _bfd_elf_section_offset (bfd
*abfd
,
7753 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
7757 switch (sec
->sec_info_type
)
7759 case ELF_INFO_TYPE_STABS
:
7760 return _bfd_stab_section_offset (sec
, elf_section_data (sec
)->sec_info
,
7762 case ELF_INFO_TYPE_EH_FRAME
:
7763 return _bfd_elf_eh_frame_section_offset (abfd
, sec
, offset
);
7769 /* Create a new BFD as if by bfd_openr. Rather than opening a file,
7770 reconstruct an ELF file by reading the segments out of remote memory
7771 based on the ELF file header at EHDR_VMA and the ELF program headers it
7772 points to. If not null, *LOADBASEP is filled in with the difference
7773 between the VMAs from which the segments were read, and the VMAs the
7774 file headers (and hence BFD's idea of each section's VMA) put them at.
7776 The function TARGET_READ_MEMORY is called to copy LEN bytes from the
7777 remote memory at target address VMA into the local buffer at MYADDR; it
7778 should return zero on success or an `errno' code on failure. TEMPL must
7779 be a BFD for an ELF target with the word size and byte order found in
7780 the remote memory. */
7783 bfd_elf_bfd_from_remote_memory
7787 int (*target_read_memory
) (bfd_vma
, char *, int))
7789 return (*get_elf_backend_data (templ
)->elf_backend_bfd_from_remote_memory
)
7790 (templ
, ehdr_vma
, loadbasep
, target_read_memory
);
7794 _bfd_elf_get_synthetic_symtab (bfd
*abfd
,
7795 long symcount ATTRIBUTE_UNUSED
,
7796 asymbol
**syms ATTRIBUTE_UNUSED
,
7797 long dynsymcount ATTRIBUTE_UNUSED
,
7801 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
7804 const char *relplt_name
;
7805 bfd_boolean (*slurp_relocs
) (bfd
*, asection
*, asymbol
**, bfd_boolean
);
7809 Elf_Internal_Shdr
*hdr
;
7813 if ((abfd
->flags
& (DYNAMIC
| EXEC_P
)) == 0)
7817 if (!bed
->plt_sym_val
)
7820 relplt_name
= bed
->relplt_name
;
7821 if (relplt_name
== NULL
)
7822 relplt_name
= bed
->default_use_rela_p
? ".rela.plt" : ".rel.plt";
7823 relplt
= bfd_get_section_by_name (abfd
, relplt_name
);
7827 hdr
= &elf_section_data (relplt
)->this_hdr
;
7828 if (hdr
->sh_link
!= elf_dynsymtab (abfd
)
7829 || (hdr
->sh_type
!= SHT_REL
&& hdr
->sh_type
!= SHT_RELA
))
7832 plt
= bfd_get_section_by_name (abfd
, ".plt");
7836 slurp_relocs
= get_elf_backend_data (abfd
)->s
->slurp_reloc_table
;
7837 if (! (*slurp_relocs
) (abfd
, relplt
, dynsyms
, TRUE
))
7840 count
= relplt
->size
/ hdr
->sh_entsize
;
7841 size
= count
* sizeof (asymbol
);
7842 p
= relplt
->relocation
;
7843 for (i
= 0; i
< count
; i
++, s
++, p
++)
7844 size
+= strlen ((*p
->sym_ptr_ptr
)->name
) + sizeof ("@plt");
7846 s
= *ret
= bfd_malloc (size
);
7850 names
= (char *) (s
+ count
);
7851 p
= relplt
->relocation
;
7853 for (i
= 0; i
< count
; i
++, s
++, p
++)
7858 addr
= bed
->plt_sym_val (i
, plt
, p
);
7859 if (addr
== (bfd_vma
) -1)
7862 *s
= **p
->sym_ptr_ptr
;
7864 s
->value
= addr
- plt
->vma
;
7866 len
= strlen ((*p
->sym_ptr_ptr
)->name
);
7867 memcpy (names
, (*p
->sym_ptr_ptr
)->name
, len
);
7869 memcpy (names
, "@plt", sizeof ("@plt"));
7870 names
+= sizeof ("@plt");
7877 /* Sort symbol by binding and section. We want to put definitions
7878 sorted by section at the beginning. */
7881 elf_sort_elf_symbol (const void *arg1
, const void *arg2
)
7883 const Elf_Internal_Sym
*s1
;
7884 const Elf_Internal_Sym
*s2
;
7887 /* Make sure that undefined symbols are at the end. */
7888 s1
= (const Elf_Internal_Sym
*) arg1
;
7889 if (s1
->st_shndx
== SHN_UNDEF
)
7891 s2
= (const Elf_Internal_Sym
*) arg2
;
7892 if (s2
->st_shndx
== SHN_UNDEF
)
7895 /* Sorted by section index. */
7896 shndx
= s1
->st_shndx
- s2
->st_shndx
;
7900 /* Sorted by binding. */
7901 return ELF_ST_BIND (s1
->st_info
) - ELF_ST_BIND (s2
->st_info
);
7906 Elf_Internal_Sym
*sym
;
7911 elf_sym_name_compare (const void *arg1
, const void *arg2
)
7913 const struct elf_symbol
*s1
= (const struct elf_symbol
*) arg1
;
7914 const struct elf_symbol
*s2
= (const struct elf_symbol
*) arg2
;
7915 return strcmp (s1
->name
, s2
->name
);
7918 /* Check if 2 sections define the same set of local and global
7922 bfd_elf_match_symbols_in_sections (asection
*sec1
, asection
*sec2
)
7925 const struct elf_backend_data
*bed1
, *bed2
;
7926 Elf_Internal_Shdr
*hdr1
, *hdr2
;
7927 bfd_size_type symcount1
, symcount2
;
7928 Elf_Internal_Sym
*isymbuf1
, *isymbuf2
;
7929 Elf_Internal_Sym
*isymstart1
= NULL
, *isymstart2
= NULL
, *isym
;
7930 Elf_Internal_Sym
*isymend
;
7931 struct elf_symbol
*symp
, *symtable1
= NULL
, *symtable2
= NULL
;
7932 bfd_size_type count1
, count2
, i
;
7939 /* If both are .gnu.linkonce sections, they have to have the same
7941 if (strncmp (sec1
->name
, ".gnu.linkonce",
7942 sizeof ".gnu.linkonce" - 1) == 0
7943 && strncmp (sec2
->name
, ".gnu.linkonce",
7944 sizeof ".gnu.linkonce" - 1) == 0)
7945 return strcmp (sec1
->name
+ sizeof ".gnu.linkonce",
7946 sec2
->name
+ sizeof ".gnu.linkonce") == 0;
7948 /* Both sections have to be in ELF. */
7949 if (bfd_get_flavour (bfd1
) != bfd_target_elf_flavour
7950 || bfd_get_flavour (bfd2
) != bfd_target_elf_flavour
)
7953 if (elf_section_type (sec1
) != elf_section_type (sec2
))
7956 if ((elf_section_flags (sec1
) & SHF_GROUP
) != 0
7957 && (elf_section_flags (sec2
) & SHF_GROUP
) != 0)
7959 /* If both are members of section groups, they have to have the
7961 if (strcmp (elf_group_name (sec1
), elf_group_name (sec2
)) != 0)
7965 shndx1
= _bfd_elf_section_from_bfd_section (bfd1
, sec1
);
7966 shndx2
= _bfd_elf_section_from_bfd_section (bfd2
, sec2
);
7967 if (shndx1
== -1 || shndx2
== -1)
7970 bed1
= get_elf_backend_data (bfd1
);
7971 bed2
= get_elf_backend_data (bfd2
);
7972 hdr1
= &elf_tdata (bfd1
)->symtab_hdr
;
7973 symcount1
= hdr1
->sh_size
/ bed1
->s
->sizeof_sym
;
7974 hdr2
= &elf_tdata (bfd2
)->symtab_hdr
;
7975 symcount2
= hdr2
->sh_size
/ bed2
->s
->sizeof_sym
;
7977 if (symcount1
== 0 || symcount2
== 0)
7980 isymbuf1
= bfd_elf_get_elf_syms (bfd1
, hdr1
, symcount1
, 0,
7982 isymbuf2
= bfd_elf_get_elf_syms (bfd2
, hdr2
, symcount2
, 0,
7986 if (isymbuf1
== NULL
|| isymbuf2
== NULL
)
7989 /* Sort symbols by binding and section. Global definitions are at
7991 qsort (isymbuf1
, symcount1
, sizeof (Elf_Internal_Sym
),
7992 elf_sort_elf_symbol
);
7993 qsort (isymbuf2
, symcount2
, sizeof (Elf_Internal_Sym
),
7994 elf_sort_elf_symbol
);
7996 /* Count definitions in the section. */
7998 for (isym
= isymbuf1
, isymend
= isym
+ symcount1
;
7999 isym
< isymend
; isym
++)
8001 if (isym
->st_shndx
== (unsigned int) shndx1
)
8008 if (count1
&& isym
->st_shndx
!= (unsigned int) shndx1
)
8013 for (isym
= isymbuf2
, isymend
= isym
+ symcount2
;
8014 isym
< isymend
; isym
++)
8016 if (isym
->st_shndx
== (unsigned int) shndx2
)
8023 if (count2
&& isym
->st_shndx
!= (unsigned int) shndx2
)
8027 if (count1
== 0 || count2
== 0 || count1
!= count2
)
8030 symtable1
= bfd_malloc (count1
* sizeof (struct elf_symbol
));
8031 symtable2
= bfd_malloc (count1
* sizeof (struct elf_symbol
));
8033 if (symtable1
== NULL
|| symtable2
== NULL
)
8037 for (isym
= isymstart1
, isymend
= isym
+ count1
;
8038 isym
< isymend
; isym
++)
8041 symp
->name
= bfd_elf_string_from_elf_section (bfd1
,
8048 for (isym
= isymstart2
, isymend
= isym
+ count1
;
8049 isym
< isymend
; isym
++)
8052 symp
->name
= bfd_elf_string_from_elf_section (bfd2
,
8058 /* Sort symbol by name. */
8059 qsort (symtable1
, count1
, sizeof (struct elf_symbol
),
8060 elf_sym_name_compare
);
8061 qsort (symtable2
, count1
, sizeof (struct elf_symbol
),
8062 elf_sym_name_compare
);
8064 for (i
= 0; i
< count1
; i
++)
8065 /* Two symbols must have the same binding, type and name. */
8066 if (symtable1
[i
].sym
->st_info
!= symtable2
[i
].sym
->st_info
8067 || symtable1
[i
].sym
->st_other
!= symtable2
[i
].sym
->st_other
8068 || strcmp (symtable1
[i
].name
, symtable2
[i
].name
) != 0)