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
, FALSE
))
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
->got
= ret
->plt
= htab
->init_refcount
;
1395 memset (&ret
->size
, 0, (sizeof (struct elf_link_hash_entry
)
1396 - offsetof (struct elf_link_hash_entry
, size
)));
1397 /* Assume that we have been called by a non-ELF symbol reader.
1398 This flag is then reset by the code which reads an ELF input
1399 file. This ensures that a symbol created by a non-ELF symbol
1400 reader will have the flag set correctly. */
1407 /* Copy data from an indirect symbol to its direct symbol, hiding the
1408 old indirect symbol. Also used for copying flags to a weakdef. */
1411 _bfd_elf_link_hash_copy_indirect (const struct elf_backend_data
*bed
,
1412 struct elf_link_hash_entry
*dir
,
1413 struct elf_link_hash_entry
*ind
)
1416 bfd_signed_vma lowest_valid
= bed
->can_refcount
;
1418 /* Copy down any references that we may have already seen to the
1419 symbol which just became indirect. */
1421 dir
->ref_dynamic
|= ind
->ref_dynamic
;
1422 dir
->ref_regular
|= ind
->ref_regular
;
1423 dir
->ref_regular_nonweak
|= ind
->ref_regular_nonweak
;
1424 dir
->non_got_ref
|= ind
->non_got_ref
;
1425 dir
->needs_plt
|= ind
->needs_plt
;
1426 dir
->pointer_equality_needed
|= ind
->pointer_equality_needed
;
1428 if (ind
->root
.type
!= bfd_link_hash_indirect
)
1431 /* Copy over the global and procedure linkage table refcount entries.
1432 These may have been already set up by a check_relocs routine. */
1433 tmp
= dir
->got
.refcount
;
1434 if (tmp
< lowest_valid
)
1436 dir
->got
.refcount
= ind
->got
.refcount
;
1437 ind
->got
.refcount
= tmp
;
1440 BFD_ASSERT (ind
->got
.refcount
< lowest_valid
);
1442 tmp
= dir
->plt
.refcount
;
1443 if (tmp
< lowest_valid
)
1445 dir
->plt
.refcount
= ind
->plt
.refcount
;
1446 ind
->plt
.refcount
= tmp
;
1449 BFD_ASSERT (ind
->plt
.refcount
< lowest_valid
);
1451 if (dir
->dynindx
== -1)
1453 dir
->dynindx
= ind
->dynindx
;
1454 dir
->dynstr_index
= ind
->dynstr_index
;
1456 ind
->dynstr_index
= 0;
1459 BFD_ASSERT (ind
->dynindx
== -1);
1463 _bfd_elf_link_hash_hide_symbol (struct bfd_link_info
*info
,
1464 struct elf_link_hash_entry
*h
,
1465 bfd_boolean force_local
)
1467 h
->plt
= elf_hash_table (info
)->init_offset
;
1471 h
->forced_local
= 1;
1472 if (h
->dynindx
!= -1)
1475 _bfd_elf_strtab_delref (elf_hash_table (info
)->dynstr
,
1481 /* Initialize an ELF linker hash table. */
1484 _bfd_elf_link_hash_table_init
1485 (struct elf_link_hash_table
*table
,
1487 struct bfd_hash_entry
*(*newfunc
) (struct bfd_hash_entry
*,
1488 struct bfd_hash_table
*,
1493 table
->dynamic_sections_created
= FALSE
;
1494 table
->dynobj
= NULL
;
1495 /* Make sure can_refcount is extended to the width and signedness of
1496 init_refcount before we subtract one from it. */
1497 table
->init_refcount
.refcount
= get_elf_backend_data (abfd
)->can_refcount
;
1498 table
->init_refcount
.refcount
-= 1;
1499 table
->init_offset
.offset
= -(bfd_vma
) 1;
1500 /* The first dynamic symbol is a dummy. */
1501 table
->dynsymcount
= 1;
1502 table
->dynstr
= NULL
;
1503 table
->bucketcount
= 0;
1504 table
->needed
= NULL
;
1506 table
->merge_info
= NULL
;
1507 memset (&table
->stab_info
, 0, sizeof (table
->stab_info
));
1508 memset (&table
->eh_info
, 0, sizeof (table
->eh_info
));
1509 table
->dynlocal
= NULL
;
1510 table
->runpath
= NULL
;
1511 table
->tls_sec
= NULL
;
1512 table
->tls_size
= 0;
1513 table
->loaded
= NULL
;
1515 ret
= _bfd_link_hash_table_init (&table
->root
, abfd
, newfunc
);
1516 table
->root
.type
= bfd_link_elf_hash_table
;
1521 /* Create an ELF linker hash table. */
1523 struct bfd_link_hash_table
*
1524 _bfd_elf_link_hash_table_create (bfd
*abfd
)
1526 struct elf_link_hash_table
*ret
;
1527 bfd_size_type amt
= sizeof (struct elf_link_hash_table
);
1529 ret
= bfd_malloc (amt
);
1533 if (! _bfd_elf_link_hash_table_init (ret
, abfd
, _bfd_elf_link_hash_newfunc
))
1542 /* This is a hook for the ELF emulation code in the generic linker to
1543 tell the backend linker what file name to use for the DT_NEEDED
1544 entry for a dynamic object. */
1547 bfd_elf_set_dt_needed_name (bfd
*abfd
, const char *name
)
1549 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1550 && bfd_get_format (abfd
) == bfd_object
)
1551 elf_dt_name (abfd
) = name
;
1555 bfd_elf_get_dyn_lib_class (bfd
*abfd
)
1558 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1559 && bfd_get_format (abfd
) == bfd_object
)
1560 lib_class
= elf_dyn_lib_class (abfd
);
1567 bfd_elf_set_dyn_lib_class (bfd
*abfd
, int lib_class
)
1569 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1570 && bfd_get_format (abfd
) == bfd_object
)
1571 elf_dyn_lib_class (abfd
) = lib_class
;
1574 /* Get the list of DT_NEEDED entries for a link. This is a hook for
1575 the linker ELF emulation code. */
1577 struct bfd_link_needed_list
*
1578 bfd_elf_get_needed_list (bfd
*abfd ATTRIBUTE_UNUSED
,
1579 struct bfd_link_info
*info
)
1581 if (! is_elf_hash_table (info
->hash
))
1583 return elf_hash_table (info
)->needed
;
1586 /* Get the list of DT_RPATH/DT_RUNPATH entries for a link. This is a
1587 hook for the linker ELF emulation code. */
1589 struct bfd_link_needed_list
*
1590 bfd_elf_get_runpath_list (bfd
*abfd ATTRIBUTE_UNUSED
,
1591 struct bfd_link_info
*info
)
1593 if (! is_elf_hash_table (info
->hash
))
1595 return elf_hash_table (info
)->runpath
;
1598 /* Get the name actually used for a dynamic object for a link. This
1599 is the SONAME entry if there is one. Otherwise, it is the string
1600 passed to bfd_elf_set_dt_needed_name, or it is the filename. */
1603 bfd_elf_get_dt_soname (bfd
*abfd
)
1605 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1606 && bfd_get_format (abfd
) == bfd_object
)
1607 return elf_dt_name (abfd
);
1611 /* Get the list of DT_NEEDED entries from a BFD. This is a hook for
1612 the ELF linker emulation code. */
1615 bfd_elf_get_bfd_needed_list (bfd
*abfd
,
1616 struct bfd_link_needed_list
**pneeded
)
1619 bfd_byte
*dynbuf
= NULL
;
1621 unsigned long shlink
;
1622 bfd_byte
*extdyn
, *extdynend
;
1624 void (*swap_dyn_in
) (bfd
*, const void *, Elf_Internal_Dyn
*);
1628 if (bfd_get_flavour (abfd
) != bfd_target_elf_flavour
1629 || bfd_get_format (abfd
) != bfd_object
)
1632 s
= bfd_get_section_by_name (abfd
, ".dynamic");
1633 if (s
== NULL
|| s
->size
== 0)
1636 if (!bfd_malloc_and_get_section (abfd
, s
, &dynbuf
))
1639 elfsec
= _bfd_elf_section_from_bfd_section (abfd
, s
);
1643 shlink
= elf_elfsections (abfd
)[elfsec
]->sh_link
;
1645 extdynsize
= get_elf_backend_data (abfd
)->s
->sizeof_dyn
;
1646 swap_dyn_in
= get_elf_backend_data (abfd
)->s
->swap_dyn_in
;
1649 extdynend
= extdyn
+ s
->size
;
1650 for (; extdyn
< extdynend
; extdyn
+= extdynsize
)
1652 Elf_Internal_Dyn dyn
;
1654 (*swap_dyn_in
) (abfd
, extdyn
, &dyn
);
1656 if (dyn
.d_tag
== DT_NULL
)
1659 if (dyn
.d_tag
== DT_NEEDED
)
1662 struct bfd_link_needed_list
*l
;
1663 unsigned int tagv
= dyn
.d_un
.d_val
;
1666 string
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
1671 l
= bfd_alloc (abfd
, amt
);
1692 /* Allocate an ELF string table--force the first byte to be zero. */
1694 struct bfd_strtab_hash
*
1695 _bfd_elf_stringtab_init (void)
1697 struct bfd_strtab_hash
*ret
;
1699 ret
= _bfd_stringtab_init ();
1704 loc
= _bfd_stringtab_add (ret
, "", TRUE
, FALSE
);
1705 BFD_ASSERT (loc
== 0 || loc
== (bfd_size_type
) -1);
1706 if (loc
== (bfd_size_type
) -1)
1708 _bfd_stringtab_free (ret
);
1715 /* ELF .o/exec file reading */
1717 /* Create a new bfd section from an ELF section header. */
1720 bfd_section_from_shdr (bfd
*abfd
, unsigned int shindex
)
1722 Elf_Internal_Shdr
*hdr
= elf_elfsections (abfd
)[shindex
];
1723 Elf_Internal_Ehdr
*ehdr
= elf_elfheader (abfd
);
1724 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
1727 name
= elf_string_from_elf_strtab (abfd
, hdr
->sh_name
);
1729 switch (hdr
->sh_type
)
1732 /* Inactive section. Throw it away. */
1735 case SHT_PROGBITS
: /* Normal section with contents. */
1736 case SHT_NOBITS
: /* .bss section. */
1737 case SHT_HASH
: /* .hash section. */
1738 case SHT_NOTE
: /* .note section. */
1739 case SHT_INIT_ARRAY
: /* .init_array section. */
1740 case SHT_FINI_ARRAY
: /* .fini_array section. */
1741 case SHT_PREINIT_ARRAY
: /* .preinit_array section. */
1742 case SHT_GNU_LIBLIST
: /* .gnu.liblist section. */
1743 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1745 case SHT_DYNAMIC
: /* Dynamic linking information. */
1746 if (! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
))
1748 if (elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_STRTAB
)
1750 Elf_Internal_Shdr
*dynsymhdr
;
1752 /* The shared libraries distributed with hpux11 have a bogus
1753 sh_link field for the ".dynamic" section. Find the
1754 string table for the ".dynsym" section instead. */
1755 if (elf_dynsymtab (abfd
) != 0)
1757 dynsymhdr
= elf_elfsections (abfd
)[elf_dynsymtab (abfd
)];
1758 hdr
->sh_link
= dynsymhdr
->sh_link
;
1762 unsigned int i
, num_sec
;
1764 num_sec
= elf_numsections (abfd
);
1765 for (i
= 1; i
< num_sec
; i
++)
1767 dynsymhdr
= elf_elfsections (abfd
)[i
];
1768 if (dynsymhdr
->sh_type
== SHT_DYNSYM
)
1770 hdr
->sh_link
= dynsymhdr
->sh_link
;
1778 case SHT_SYMTAB
: /* A symbol table */
1779 if (elf_onesymtab (abfd
) == shindex
)
1782 BFD_ASSERT (hdr
->sh_entsize
== bed
->s
->sizeof_sym
);
1783 BFD_ASSERT (elf_onesymtab (abfd
) == 0);
1784 elf_onesymtab (abfd
) = shindex
;
1785 elf_tdata (abfd
)->symtab_hdr
= *hdr
;
1786 elf_elfsections (abfd
)[shindex
] = hdr
= &elf_tdata (abfd
)->symtab_hdr
;
1787 abfd
->flags
|= HAS_SYMS
;
1789 /* Sometimes a shared object will map in the symbol table. If
1790 SHF_ALLOC is set, and this is a shared object, then we also
1791 treat this section as a BFD section. We can not base the
1792 decision purely on SHF_ALLOC, because that flag is sometimes
1793 set in a relocatable object file, which would confuse the
1795 if ((hdr
->sh_flags
& SHF_ALLOC
) != 0
1796 && (abfd
->flags
& DYNAMIC
) != 0
1797 && ! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
))
1802 case SHT_DYNSYM
: /* A dynamic symbol table */
1803 if (elf_dynsymtab (abfd
) == shindex
)
1806 BFD_ASSERT (hdr
->sh_entsize
== bed
->s
->sizeof_sym
);
1807 BFD_ASSERT (elf_dynsymtab (abfd
) == 0);
1808 elf_dynsymtab (abfd
) = shindex
;
1809 elf_tdata (abfd
)->dynsymtab_hdr
= *hdr
;
1810 elf_elfsections (abfd
)[shindex
] = hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
1811 abfd
->flags
|= HAS_SYMS
;
1813 /* Besides being a symbol table, we also treat this as a regular
1814 section, so that objcopy can handle it. */
1815 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1817 case SHT_SYMTAB_SHNDX
: /* Symbol section indices when >64k sections */
1818 if (elf_symtab_shndx (abfd
) == shindex
)
1821 /* Get the associated symbol table. */
1822 if (! bfd_section_from_shdr (abfd
, hdr
->sh_link
)
1823 || hdr
->sh_link
!= elf_onesymtab (abfd
))
1826 elf_symtab_shndx (abfd
) = shindex
;
1827 elf_tdata (abfd
)->symtab_shndx_hdr
= *hdr
;
1828 elf_elfsections (abfd
)[shindex
] = &elf_tdata (abfd
)->symtab_shndx_hdr
;
1831 case SHT_STRTAB
: /* A string table */
1832 if (hdr
->bfd_section
!= NULL
)
1834 if (ehdr
->e_shstrndx
== shindex
)
1836 elf_tdata (abfd
)->shstrtab_hdr
= *hdr
;
1837 elf_elfsections (abfd
)[shindex
] = &elf_tdata (abfd
)->shstrtab_hdr
;
1841 unsigned int i
, num_sec
;
1843 num_sec
= elf_numsections (abfd
);
1844 for (i
= 1; i
< num_sec
; i
++)
1846 Elf_Internal_Shdr
*hdr2
= elf_elfsections (abfd
)[i
];
1847 if (hdr2
->sh_link
== shindex
)
1849 if (! bfd_section_from_shdr (abfd
, i
))
1851 if (elf_onesymtab (abfd
) == i
)
1853 elf_tdata (abfd
)->strtab_hdr
= *hdr
;
1854 elf_elfsections (abfd
)[shindex
] =
1855 &elf_tdata (abfd
)->strtab_hdr
;
1858 if (elf_dynsymtab (abfd
) == i
)
1860 elf_tdata (abfd
)->dynstrtab_hdr
= *hdr
;
1861 elf_elfsections (abfd
)[shindex
] = hdr
=
1862 &elf_tdata (abfd
)->dynstrtab_hdr
;
1863 /* We also treat this as a regular section, so
1864 that objcopy can handle it. */
1867 #if 0 /* Not handling other string tables specially right now. */
1868 hdr2
= elf_elfsections (abfd
)[i
]; /* in case it moved */
1869 /* We have a strtab for some random other section. */
1870 newsect
= (asection
*) hdr2
->bfd_section
;
1873 hdr
->bfd_section
= newsect
;
1874 hdr2
= &elf_section_data (newsect
)->str_hdr
;
1876 elf_elfsections (abfd
)[shindex
] = hdr2
;
1882 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1886 /* *These* do a lot of work -- but build no sections! */
1888 asection
*target_sect
;
1889 Elf_Internal_Shdr
*hdr2
;
1890 unsigned int num_sec
= elf_numsections (abfd
);
1892 /* Check for a bogus link to avoid crashing. */
1893 if ((hdr
->sh_link
>= SHN_LORESERVE
&& hdr
->sh_link
<= SHN_HIRESERVE
)
1894 || hdr
->sh_link
>= num_sec
)
1896 ((*_bfd_error_handler
)
1897 (_("%B: invalid link %lu for reloc section %s (index %u)"),
1898 abfd
, hdr
->sh_link
, name
, shindex
));
1899 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1902 /* For some incomprehensible reason Oracle distributes
1903 libraries for Solaris in which some of the objects have
1904 bogus sh_link fields. It would be nice if we could just
1905 reject them, but, unfortunately, some people need to use
1906 them. We scan through the section headers; if we find only
1907 one suitable symbol table, we clobber the sh_link to point
1908 to it. I hope this doesn't break anything. */
1909 if (elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_SYMTAB
1910 && elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_DYNSYM
)
1916 for (scan
= 1; scan
< num_sec
; scan
++)
1918 if (elf_elfsections (abfd
)[scan
]->sh_type
== SHT_SYMTAB
1919 || elf_elfsections (abfd
)[scan
]->sh_type
== SHT_DYNSYM
)
1930 hdr
->sh_link
= found
;
1933 /* Get the symbol table. */
1934 if (elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
== SHT_SYMTAB
1935 && ! bfd_section_from_shdr (abfd
, hdr
->sh_link
))
1938 /* If this reloc section does not use the main symbol table we
1939 don't treat it as a reloc section. BFD can't adequately
1940 represent such a section, so at least for now, we don't
1941 try. We just present it as a normal section. We also
1942 can't use it as a reloc section if it points to the null
1944 if (hdr
->sh_link
!= elf_onesymtab (abfd
) || hdr
->sh_info
== SHN_UNDEF
)
1945 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1947 if (! bfd_section_from_shdr (abfd
, hdr
->sh_info
))
1949 target_sect
= bfd_section_from_elf_index (abfd
, hdr
->sh_info
);
1950 if (target_sect
== NULL
)
1953 if ((target_sect
->flags
& SEC_RELOC
) == 0
1954 || target_sect
->reloc_count
== 0)
1955 hdr2
= &elf_section_data (target_sect
)->rel_hdr
;
1959 BFD_ASSERT (elf_section_data (target_sect
)->rel_hdr2
== NULL
);
1960 amt
= sizeof (*hdr2
);
1961 hdr2
= bfd_alloc (abfd
, amt
);
1962 elf_section_data (target_sect
)->rel_hdr2
= hdr2
;
1965 elf_elfsections (abfd
)[shindex
] = hdr2
;
1966 target_sect
->reloc_count
+= NUM_SHDR_ENTRIES (hdr
);
1967 target_sect
->flags
|= SEC_RELOC
;
1968 target_sect
->relocation
= NULL
;
1969 target_sect
->rel_filepos
= hdr
->sh_offset
;
1970 /* In the section to which the relocations apply, mark whether
1971 its relocations are of the REL or RELA variety. */
1972 if (hdr
->sh_size
!= 0)
1973 target_sect
->use_rela_p
= hdr
->sh_type
== SHT_RELA
;
1974 abfd
->flags
|= HAS_RELOC
;
1979 case SHT_GNU_verdef
:
1980 elf_dynverdef (abfd
) = shindex
;
1981 elf_tdata (abfd
)->dynverdef_hdr
= *hdr
;
1982 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1985 case SHT_GNU_versym
:
1986 elf_dynversym (abfd
) = shindex
;
1987 elf_tdata (abfd
)->dynversym_hdr
= *hdr
;
1988 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1991 case SHT_GNU_verneed
:
1992 elf_dynverref (abfd
) = shindex
;
1993 elf_tdata (abfd
)->dynverref_hdr
= *hdr
;
1994 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
2001 /* We need a BFD section for objcopy and relocatable linking,
2002 and it's handy to have the signature available as the section
2004 name
= group_signature (abfd
, hdr
);
2007 if (!_bfd_elf_make_section_from_shdr (abfd
, hdr
, name
))
2009 if (hdr
->contents
!= NULL
)
2011 Elf_Internal_Group
*idx
= (Elf_Internal_Group
*) hdr
->contents
;
2012 unsigned int n_elt
= hdr
->sh_size
/ 4;
2015 if (idx
->flags
& GRP_COMDAT
)
2016 hdr
->bfd_section
->flags
2017 |= SEC_LINK_ONCE
| SEC_LINK_DUPLICATES_DISCARD
;
2019 /* We try to keep the same section order as it comes in. */
2021 while (--n_elt
!= 0)
2022 if ((s
= (--idx
)->shdr
->bfd_section
) != NULL
2023 && elf_next_in_group (s
) != NULL
)
2025 elf_next_in_group (hdr
->bfd_section
) = s
;
2032 /* Check for any processor-specific section types. */
2034 if (bed
->elf_backend_section_from_shdr
)
2035 (*bed
->elf_backend_section_from_shdr
) (abfd
, hdr
, name
);
2043 /* Return the section for the local symbol specified by ABFD, R_SYMNDX.
2044 Return SEC for sections that have no elf section, and NULL on error. */
2047 bfd_section_from_r_symndx (bfd
*abfd
,
2048 struct sym_sec_cache
*cache
,
2050 unsigned long r_symndx
)
2052 Elf_Internal_Shdr
*symtab_hdr
;
2053 unsigned char esym
[sizeof (Elf64_External_Sym
)];
2054 Elf_External_Sym_Shndx eshndx
;
2055 Elf_Internal_Sym isym
;
2056 unsigned int ent
= r_symndx
% LOCAL_SYM_CACHE_SIZE
;
2058 if (cache
->abfd
== abfd
&& cache
->indx
[ent
] == r_symndx
)
2059 return cache
->sec
[ent
];
2061 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2062 if (bfd_elf_get_elf_syms (abfd
, symtab_hdr
, 1, r_symndx
,
2063 &isym
, esym
, &eshndx
) == NULL
)
2066 if (cache
->abfd
!= abfd
)
2068 memset (cache
->indx
, -1, sizeof (cache
->indx
));
2071 cache
->indx
[ent
] = r_symndx
;
2072 cache
->sec
[ent
] = sec
;
2073 if ((isym
.st_shndx
!= SHN_UNDEF
&& isym
.st_shndx
< SHN_LORESERVE
)
2074 || isym
.st_shndx
> SHN_HIRESERVE
)
2077 s
= bfd_section_from_elf_index (abfd
, isym
.st_shndx
);
2079 cache
->sec
[ent
] = s
;
2081 return cache
->sec
[ent
];
2084 /* Given an ELF section number, retrieve the corresponding BFD
2088 bfd_section_from_elf_index (bfd
*abfd
, unsigned int index
)
2090 if (index
>= elf_numsections (abfd
))
2092 return elf_elfsections (abfd
)[index
]->bfd_section
;
2095 static struct bfd_elf_special_section
const special_sections
[] =
2097 { ".bss", 4, -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
},
2098 { ".gnu.linkonce.b",15, -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
},
2099 { ".comment", 8, 0, SHT_PROGBITS
, 0 },
2100 { ".data", 5, -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
},
2101 { ".data1", 6, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
},
2102 { ".debug", 6, 0, SHT_PROGBITS
, 0 },
2103 { ".fini", 5, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
},
2104 { ".init", 5, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
},
2105 { ".line", 5, 0, SHT_PROGBITS
, 0 },
2106 { ".rodata", 7, -2, SHT_PROGBITS
, SHF_ALLOC
},
2107 { ".rodata1", 8, 0, SHT_PROGBITS
, SHF_ALLOC
},
2108 { ".tbss", 5, -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_TLS
},
2109 { ".tdata", 6, -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_TLS
},
2110 { ".text", 5, -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
},
2111 { ".init_array", 11, 0, SHT_INIT_ARRAY
, SHF_ALLOC
+ SHF_WRITE
},
2112 { ".fini_array", 11, 0, SHT_FINI_ARRAY
, SHF_ALLOC
+ SHF_WRITE
},
2113 { ".preinit_array", 14, 0, SHT_PREINIT_ARRAY
, SHF_ALLOC
+ SHF_WRITE
},
2114 { ".debug_line", 11, 0, SHT_PROGBITS
, 0 },
2115 { ".debug_info", 11, 0, SHT_PROGBITS
, 0 },
2116 { ".debug_abbrev", 13, 0, SHT_PROGBITS
, 0 },
2117 { ".debug_aranges", 14, 0, SHT_PROGBITS
, 0 },
2118 { ".dynamic", 8, 0, SHT_DYNAMIC
, SHF_ALLOC
},
2119 { ".dynstr", 7, 0, SHT_STRTAB
, SHF_ALLOC
},
2120 { ".dynsym", 7, 0, SHT_DYNSYM
, SHF_ALLOC
},
2121 { ".got", 4, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
},
2122 { ".hash", 5, 0, SHT_HASH
, SHF_ALLOC
},
2123 { ".interp", 7, 0, SHT_PROGBITS
, 0 },
2124 { ".plt", 4, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
},
2125 { ".shstrtab", 9, 0, SHT_STRTAB
, 0 },
2126 { ".strtab", 7, 0, SHT_STRTAB
, 0 },
2127 { ".symtab", 7, 0, SHT_SYMTAB
, 0 },
2128 { ".gnu.version", 12, 0, SHT_GNU_versym
, 0 },
2129 { ".gnu.version_d", 14, 0, SHT_GNU_verdef
, 0 },
2130 { ".gnu.version_r", 14, 0, SHT_GNU_verneed
, 0 },
2131 { ".note.GNU-stack",15, 0, SHT_PROGBITS
, 0 },
2132 { ".note", 5, -1, SHT_NOTE
, 0 },
2133 { ".rela", 5, -1, SHT_RELA
, 0 },
2134 { ".rel", 4, -1, SHT_REL
, 0 },
2135 { ".stabstr", 5, 3, SHT_STRTAB
, 0 },
2136 { ".gnu.liblist", 12, 0, SHT_GNU_LIBLIST
, SHF_ALLOC
},
2137 { ".gnu.conflict", 13, 0, SHT_RELA
, SHF_ALLOC
},
2138 { NULL
, 0, 0, 0, 0 }
2141 static const struct bfd_elf_special_section
*
2142 get_special_section (const char *name
,
2143 const struct bfd_elf_special_section
*special_sections
,
2147 int len
= strlen (name
);
2149 for (i
= 0; special_sections
[i
].prefix
!= NULL
; i
++)
2152 int prefix_len
= special_sections
[i
].prefix_length
;
2154 if (len
< prefix_len
)
2156 if (memcmp (name
, special_sections
[i
].prefix
, prefix_len
) != 0)
2159 suffix_len
= special_sections
[i
].suffix_length
;
2160 if (suffix_len
<= 0)
2162 if (name
[prefix_len
] != 0)
2164 if (suffix_len
== 0)
2166 if (name
[prefix_len
] != '.'
2167 && (suffix_len
== -2
2168 || (rela
&& special_sections
[i
].type
== SHT_REL
)))
2174 if (len
< prefix_len
+ suffix_len
)
2176 if (memcmp (name
+ len
- suffix_len
,
2177 special_sections
[i
].prefix
+ prefix_len
,
2181 return &special_sections
[i
];
2187 const struct bfd_elf_special_section
*
2188 _bfd_elf_get_sec_type_attr (bfd
*abfd
, const char *name
)
2190 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2191 const struct bfd_elf_special_section
*ssect
= NULL
;
2193 /* See if this is one of the special sections. */
2196 unsigned int rela
= bed
->default_use_rela_p
;
2198 if (bed
->special_sections
)
2199 ssect
= get_special_section (name
, bed
->special_sections
, rela
);
2202 ssect
= get_special_section (name
, special_sections
, rela
);
2209 _bfd_elf_new_section_hook (bfd
*abfd
, asection
*sec
)
2211 struct bfd_elf_section_data
*sdata
;
2212 const struct bfd_elf_special_section
*ssect
;
2214 sdata
= (struct bfd_elf_section_data
*) sec
->used_by_bfd
;
2217 sdata
= bfd_zalloc (abfd
, sizeof (*sdata
));
2220 sec
->used_by_bfd
= sdata
;
2223 elf_section_type (sec
) = SHT_NULL
;
2224 ssect
= _bfd_elf_get_sec_type_attr (abfd
, sec
->name
);
2227 elf_section_type (sec
) = ssect
->type
;
2228 elf_section_flags (sec
) = ssect
->attr
;
2231 /* Indicate whether or not this section should use RELA relocations. */
2232 sec
->use_rela_p
= get_elf_backend_data (abfd
)->default_use_rela_p
;
2237 /* Create a new bfd section from an ELF program header.
2239 Since program segments have no names, we generate a synthetic name
2240 of the form segment<NUM>, where NUM is generally the index in the
2241 program header table. For segments that are split (see below) we
2242 generate the names segment<NUM>a and segment<NUM>b.
2244 Note that some program segments may have a file size that is different than
2245 (less than) the memory size. All this means is that at execution the
2246 system must allocate the amount of memory specified by the memory size,
2247 but only initialize it with the first "file size" bytes read from the
2248 file. This would occur for example, with program segments consisting
2249 of combined data+bss.
2251 To handle the above situation, this routine generates TWO bfd sections
2252 for the single program segment. The first has the length specified by
2253 the file size of the segment, and the second has the length specified
2254 by the difference between the two sizes. In effect, the segment is split
2255 into it's initialized and uninitialized parts.
2260 _bfd_elf_make_section_from_phdr (bfd
*abfd
,
2261 Elf_Internal_Phdr
*hdr
,
2263 const char *typename
)
2271 split
= ((hdr
->p_memsz
> 0)
2272 && (hdr
->p_filesz
> 0)
2273 && (hdr
->p_memsz
> hdr
->p_filesz
));
2274 sprintf (namebuf
, "%s%d%s", typename
, index
, split
? "a" : "");
2275 len
= strlen (namebuf
) + 1;
2276 name
= bfd_alloc (abfd
, len
);
2279 memcpy (name
, namebuf
, len
);
2280 newsect
= bfd_make_section (abfd
, name
);
2281 if (newsect
== NULL
)
2283 newsect
->vma
= hdr
->p_vaddr
;
2284 newsect
->lma
= hdr
->p_paddr
;
2285 newsect
->size
= hdr
->p_filesz
;
2286 newsect
->filepos
= hdr
->p_offset
;
2287 newsect
->flags
|= SEC_HAS_CONTENTS
;
2288 newsect
->alignment_power
= bfd_log2 (hdr
->p_align
);
2289 if (hdr
->p_type
== PT_LOAD
)
2291 newsect
->flags
|= SEC_ALLOC
;
2292 newsect
->flags
|= SEC_LOAD
;
2293 if (hdr
->p_flags
& PF_X
)
2295 /* FIXME: all we known is that it has execute PERMISSION,
2297 newsect
->flags
|= SEC_CODE
;
2300 if (!(hdr
->p_flags
& PF_W
))
2302 newsect
->flags
|= SEC_READONLY
;
2307 sprintf (namebuf
, "%s%db", typename
, index
);
2308 len
= strlen (namebuf
) + 1;
2309 name
= bfd_alloc (abfd
, len
);
2312 memcpy (name
, namebuf
, len
);
2313 newsect
= bfd_make_section (abfd
, name
);
2314 if (newsect
== NULL
)
2316 newsect
->vma
= hdr
->p_vaddr
+ hdr
->p_filesz
;
2317 newsect
->lma
= hdr
->p_paddr
+ hdr
->p_filesz
;
2318 newsect
->size
= hdr
->p_memsz
- hdr
->p_filesz
;
2319 if (hdr
->p_type
== PT_LOAD
)
2321 newsect
->flags
|= SEC_ALLOC
;
2322 if (hdr
->p_flags
& PF_X
)
2323 newsect
->flags
|= SEC_CODE
;
2325 if (!(hdr
->p_flags
& PF_W
))
2326 newsect
->flags
|= SEC_READONLY
;
2333 bfd_section_from_phdr (bfd
*abfd
, Elf_Internal_Phdr
*hdr
, int index
)
2335 const struct elf_backend_data
*bed
;
2337 switch (hdr
->p_type
)
2340 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "null");
2343 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "load");
2346 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "dynamic");
2349 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "interp");
2352 if (! _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "note"))
2354 if (! elfcore_read_notes (abfd
, hdr
->p_offset
, hdr
->p_filesz
))
2359 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "shlib");
2362 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "phdr");
2364 case PT_GNU_EH_FRAME
:
2365 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
,
2369 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "stack");
2372 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "relro");
2375 /* Check for any processor-specific program segment types.
2376 If no handler for them, default to making "segment" sections. */
2377 bed
= get_elf_backend_data (abfd
);
2378 if (bed
->elf_backend_section_from_phdr
)
2379 return (*bed
->elf_backend_section_from_phdr
) (abfd
, hdr
, index
);
2381 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "segment");
2385 /* Initialize REL_HDR, the section-header for new section, containing
2386 relocations against ASECT. If USE_RELA_P is TRUE, we use RELA
2387 relocations; otherwise, we use REL relocations. */
2390 _bfd_elf_init_reloc_shdr (bfd
*abfd
,
2391 Elf_Internal_Shdr
*rel_hdr
,
2393 bfd_boolean use_rela_p
)
2396 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2397 bfd_size_type amt
= sizeof ".rela" + strlen (asect
->name
);
2399 name
= bfd_alloc (abfd
, amt
);
2402 sprintf (name
, "%s%s", use_rela_p
? ".rela" : ".rel", asect
->name
);
2404 (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd
), name
,
2406 if (rel_hdr
->sh_name
== (unsigned int) -1)
2408 rel_hdr
->sh_type
= use_rela_p
? SHT_RELA
: SHT_REL
;
2409 rel_hdr
->sh_entsize
= (use_rela_p
2410 ? bed
->s
->sizeof_rela
2411 : bed
->s
->sizeof_rel
);
2412 rel_hdr
->sh_addralign
= 1 << bed
->s
->log_file_align
;
2413 rel_hdr
->sh_flags
= 0;
2414 rel_hdr
->sh_addr
= 0;
2415 rel_hdr
->sh_size
= 0;
2416 rel_hdr
->sh_offset
= 0;
2421 /* Set up an ELF internal section header for a section. */
2424 elf_fake_sections (bfd
*abfd
, asection
*asect
, void *failedptrarg
)
2426 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2427 bfd_boolean
*failedptr
= failedptrarg
;
2428 Elf_Internal_Shdr
*this_hdr
;
2432 /* We already failed; just get out of the bfd_map_over_sections
2437 this_hdr
= &elf_section_data (asect
)->this_hdr
;
2439 this_hdr
->sh_name
= (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd
),
2440 asect
->name
, FALSE
);
2441 if (this_hdr
->sh_name
== (unsigned int) -1)
2447 this_hdr
->sh_flags
= 0;
2449 if ((asect
->flags
& SEC_ALLOC
) != 0
2450 || asect
->user_set_vma
)
2451 this_hdr
->sh_addr
= asect
->vma
;
2453 this_hdr
->sh_addr
= 0;
2455 this_hdr
->sh_offset
= 0;
2456 this_hdr
->sh_size
= asect
->size
;
2457 this_hdr
->sh_link
= 0;
2458 this_hdr
->sh_addralign
= 1 << asect
->alignment_power
;
2459 /* The sh_entsize and sh_info fields may have been set already by
2460 copy_private_section_data. */
2462 this_hdr
->bfd_section
= asect
;
2463 this_hdr
->contents
= NULL
;
2465 /* If the section type is unspecified, we set it based on
2467 if (this_hdr
->sh_type
== SHT_NULL
)
2469 if ((asect
->flags
& SEC_GROUP
) != 0)
2471 /* We also need to mark SHF_GROUP here for relocatable
2473 struct bfd_link_order
*l
;
2476 for (l
= asect
->link_order_head
; l
!= NULL
; l
= l
->next
)
2477 if (l
->type
== bfd_indirect_link_order
2478 && (elt
= elf_next_in_group (l
->u
.indirect
.section
)) != NULL
)
2481 /* The name is not important. Anything will do. */
2482 elf_group_name (elt
->output_section
) = "G";
2483 elf_section_flags (elt
->output_section
) |= SHF_GROUP
;
2485 elt
= elf_next_in_group (elt
);
2486 /* During a relocatable link, the lists are
2489 while (elt
!= elf_next_in_group (l
->u
.indirect
.section
));
2491 this_hdr
->sh_type
= SHT_GROUP
;
2493 else if ((asect
->flags
& SEC_ALLOC
) != 0
2494 && (((asect
->flags
& (SEC_LOAD
| SEC_HAS_CONTENTS
)) == 0)
2495 || (asect
->flags
& SEC_NEVER_LOAD
) != 0))
2496 this_hdr
->sh_type
= SHT_NOBITS
;
2498 this_hdr
->sh_type
= SHT_PROGBITS
;
2501 switch (this_hdr
->sh_type
)
2507 case SHT_INIT_ARRAY
:
2508 case SHT_FINI_ARRAY
:
2509 case SHT_PREINIT_ARRAY
:
2516 this_hdr
->sh_entsize
= bed
->s
->sizeof_hash_entry
;
2520 this_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
2524 this_hdr
->sh_entsize
= bed
->s
->sizeof_dyn
;
2528 if (get_elf_backend_data (abfd
)->may_use_rela_p
)
2529 this_hdr
->sh_entsize
= bed
->s
->sizeof_rela
;
2533 if (get_elf_backend_data (abfd
)->may_use_rel_p
)
2534 this_hdr
->sh_entsize
= bed
->s
->sizeof_rel
;
2537 case SHT_GNU_versym
:
2538 this_hdr
->sh_entsize
= sizeof (Elf_External_Versym
);
2541 case SHT_GNU_verdef
:
2542 this_hdr
->sh_entsize
= 0;
2543 /* objcopy or strip will copy over sh_info, but may not set
2544 cverdefs. The linker will set cverdefs, but sh_info will be
2546 if (this_hdr
->sh_info
== 0)
2547 this_hdr
->sh_info
= elf_tdata (abfd
)->cverdefs
;
2549 BFD_ASSERT (elf_tdata (abfd
)->cverdefs
== 0
2550 || this_hdr
->sh_info
== elf_tdata (abfd
)->cverdefs
);
2553 case SHT_GNU_verneed
:
2554 this_hdr
->sh_entsize
= 0;
2555 /* objcopy or strip will copy over sh_info, but may not set
2556 cverrefs. The linker will set cverrefs, but sh_info will be
2558 if (this_hdr
->sh_info
== 0)
2559 this_hdr
->sh_info
= elf_tdata (abfd
)->cverrefs
;
2561 BFD_ASSERT (elf_tdata (abfd
)->cverrefs
== 0
2562 || this_hdr
->sh_info
== elf_tdata (abfd
)->cverrefs
);
2566 this_hdr
->sh_entsize
= 4;
2570 if ((asect
->flags
& SEC_ALLOC
) != 0)
2571 this_hdr
->sh_flags
|= SHF_ALLOC
;
2572 if ((asect
->flags
& SEC_READONLY
) == 0)
2573 this_hdr
->sh_flags
|= SHF_WRITE
;
2574 if ((asect
->flags
& SEC_CODE
) != 0)
2575 this_hdr
->sh_flags
|= SHF_EXECINSTR
;
2576 if ((asect
->flags
& SEC_MERGE
) != 0)
2578 this_hdr
->sh_flags
|= SHF_MERGE
;
2579 this_hdr
->sh_entsize
= asect
->entsize
;
2580 if ((asect
->flags
& SEC_STRINGS
) != 0)
2581 this_hdr
->sh_flags
|= SHF_STRINGS
;
2583 if ((asect
->flags
& SEC_GROUP
) == 0 && elf_group_name (asect
) != NULL
)
2584 this_hdr
->sh_flags
|= SHF_GROUP
;
2585 if ((asect
->flags
& SEC_THREAD_LOCAL
) != 0)
2587 this_hdr
->sh_flags
|= SHF_TLS
;
2588 if (asect
->size
== 0 && (asect
->flags
& SEC_HAS_CONTENTS
) == 0)
2590 struct bfd_link_order
*o
;
2592 this_hdr
->sh_size
= 0;
2593 for (o
= asect
->link_order_head
; o
!= NULL
; o
= o
->next
)
2594 if (this_hdr
->sh_size
< o
->offset
+ o
->size
)
2595 this_hdr
->sh_size
= o
->offset
+ o
->size
;
2596 if (this_hdr
->sh_size
)
2597 this_hdr
->sh_type
= SHT_NOBITS
;
2601 /* Check for processor-specific section types. */
2602 if (bed
->elf_backend_fake_sections
2603 && !(*bed
->elf_backend_fake_sections
) (abfd
, this_hdr
, asect
))
2606 /* If the section has relocs, set up a section header for the
2607 SHT_REL[A] section. If two relocation sections are required for
2608 this section, it is up to the processor-specific back-end to
2609 create the other. */
2610 if ((asect
->flags
& SEC_RELOC
) != 0
2611 && !_bfd_elf_init_reloc_shdr (abfd
,
2612 &elf_section_data (asect
)->rel_hdr
,
2618 /* Fill in the contents of a SHT_GROUP section. */
2621 bfd_elf_set_group_contents (bfd
*abfd
, asection
*sec
, void *failedptrarg
)
2623 bfd_boolean
*failedptr
= failedptrarg
;
2624 unsigned long symindx
;
2625 asection
*elt
, *first
;
2627 struct bfd_link_order
*l
;
2630 if (elf_section_data (sec
)->this_hdr
.sh_type
!= SHT_GROUP
2635 if (elf_group_id (sec
) != NULL
)
2636 symindx
= elf_group_id (sec
)->udata
.i
;
2640 /* If called from the assembler, swap_out_syms will have set up
2641 elf_section_syms; If called for "ld -r", use target_index. */
2642 if (elf_section_syms (abfd
) != NULL
)
2643 symindx
= elf_section_syms (abfd
)[sec
->index
]->udata
.i
;
2645 symindx
= sec
->target_index
;
2647 elf_section_data (sec
)->this_hdr
.sh_info
= symindx
;
2649 /* The contents won't be allocated for "ld -r" or objcopy. */
2651 if (sec
->contents
== NULL
)
2654 sec
->contents
= bfd_alloc (abfd
, sec
->size
);
2656 /* Arrange for the section to be written out. */
2657 elf_section_data (sec
)->this_hdr
.contents
= sec
->contents
;
2658 if (sec
->contents
== NULL
)
2665 loc
= sec
->contents
+ sec
->size
;
2667 /* Get the pointer to the first section in the group that gas
2668 squirreled away here. objcopy arranges for this to be set to the
2669 start of the input section group. */
2670 first
= elt
= elf_next_in_group (sec
);
2672 /* First element is a flag word. Rest of section is elf section
2673 indices for all the sections of the group. Write them backwards
2674 just to keep the group in the same order as given in .section
2675 directives, not that it matters. */
2684 s
= s
->output_section
;
2687 idx
= elf_section_data (s
)->this_idx
;
2688 H_PUT_32 (abfd
, idx
, loc
);
2689 elt
= elf_next_in_group (elt
);
2694 /* If this is a relocatable link, then the above did nothing because
2695 SEC is the output section. Look through the input sections
2697 for (l
= sec
->link_order_head
; l
!= NULL
; l
= l
->next
)
2698 if (l
->type
== bfd_indirect_link_order
2699 && (elt
= elf_next_in_group (l
->u
.indirect
.section
)) != NULL
)
2704 elf_section_data (elt
->output_section
)->this_idx
, loc
);
2705 elt
= elf_next_in_group (elt
);
2706 /* During a relocatable link, the lists are circular. */
2708 while (elt
!= elf_next_in_group (l
->u
.indirect
.section
));
2710 if ((loc
-= 4) != sec
->contents
)
2713 H_PUT_32 (abfd
, sec
->flags
& SEC_LINK_ONCE
? GRP_COMDAT
: 0, loc
);
2716 /* Assign all ELF section numbers. The dummy first section is handled here
2717 too. The link/info pointers for the standard section types are filled
2718 in here too, while we're at it. */
2721 assign_section_numbers (bfd
*abfd
)
2723 struct elf_obj_tdata
*t
= elf_tdata (abfd
);
2725 unsigned int section_number
, secn
;
2726 Elf_Internal_Shdr
**i_shdrp
;
2728 struct bfd_elf_section_data
*d
;
2732 _bfd_elf_strtab_clear_all_refs (elf_shstrtab (abfd
));
2734 /* Put SHT_GROUP sections first. */
2735 for (sec
= abfd
->sections
; sec
; sec
= sec
->next
)
2737 d
= elf_section_data (sec
);
2739 if (d
->this_hdr
.sh_type
== SHT_GROUP
)
2741 if (section_number
== SHN_LORESERVE
)
2742 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2743 d
->this_idx
= section_number
++;
2747 for (sec
= abfd
->sections
; sec
; sec
= sec
->next
)
2749 d
= elf_section_data (sec
);
2751 if (d
->this_hdr
.sh_type
!= SHT_GROUP
)
2753 if (section_number
== SHN_LORESERVE
)
2754 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2755 d
->this_idx
= section_number
++;
2757 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->this_hdr
.sh_name
);
2758 if ((sec
->flags
& SEC_RELOC
) == 0)
2762 if (section_number
== SHN_LORESERVE
)
2763 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2764 d
->rel_idx
= section_number
++;
2765 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->rel_hdr
.sh_name
);
2770 if (section_number
== SHN_LORESERVE
)
2771 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2772 d
->rel_idx2
= section_number
++;
2773 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->rel_hdr2
->sh_name
);
2779 if (section_number
== SHN_LORESERVE
)
2780 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2781 t
->shstrtab_section
= section_number
++;
2782 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->shstrtab_hdr
.sh_name
);
2783 elf_elfheader (abfd
)->e_shstrndx
= t
->shstrtab_section
;
2785 if (bfd_get_symcount (abfd
) > 0)
2787 if (section_number
== SHN_LORESERVE
)
2788 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2789 t
->symtab_section
= section_number
++;
2790 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->symtab_hdr
.sh_name
);
2791 if (section_number
> SHN_LORESERVE
- 2)
2793 if (section_number
== SHN_LORESERVE
)
2794 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2795 t
->symtab_shndx_section
= section_number
++;
2796 t
->symtab_shndx_hdr
.sh_name
2797 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd
),
2798 ".symtab_shndx", FALSE
);
2799 if (t
->symtab_shndx_hdr
.sh_name
== (unsigned int) -1)
2802 if (section_number
== SHN_LORESERVE
)
2803 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2804 t
->strtab_section
= section_number
++;
2805 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->strtab_hdr
.sh_name
);
2808 _bfd_elf_strtab_finalize (elf_shstrtab (abfd
));
2809 t
->shstrtab_hdr
.sh_size
= _bfd_elf_strtab_size (elf_shstrtab (abfd
));
2811 elf_numsections (abfd
) = section_number
;
2812 elf_elfheader (abfd
)->e_shnum
= section_number
;
2813 if (section_number
> SHN_LORESERVE
)
2814 elf_elfheader (abfd
)->e_shnum
-= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2816 /* Set up the list of section header pointers, in agreement with the
2818 amt
= section_number
* sizeof (Elf_Internal_Shdr
*);
2819 i_shdrp
= bfd_zalloc (abfd
, amt
);
2820 if (i_shdrp
== NULL
)
2823 amt
= sizeof (Elf_Internal_Shdr
);
2824 i_shdrp
[0] = bfd_zalloc (abfd
, amt
);
2825 if (i_shdrp
[0] == NULL
)
2827 bfd_release (abfd
, i_shdrp
);
2831 elf_elfsections (abfd
) = i_shdrp
;
2833 i_shdrp
[t
->shstrtab_section
] = &t
->shstrtab_hdr
;
2834 if (bfd_get_symcount (abfd
) > 0)
2836 i_shdrp
[t
->symtab_section
] = &t
->symtab_hdr
;
2837 if (elf_numsections (abfd
) > SHN_LORESERVE
)
2839 i_shdrp
[t
->symtab_shndx_section
] = &t
->symtab_shndx_hdr
;
2840 t
->symtab_shndx_hdr
.sh_link
= t
->symtab_section
;
2842 i_shdrp
[t
->strtab_section
] = &t
->strtab_hdr
;
2843 t
->symtab_hdr
.sh_link
= t
->strtab_section
;
2846 for (sec
= abfd
->sections
; sec
; sec
= sec
->next
)
2848 struct bfd_elf_section_data
*d
= elf_section_data (sec
);
2852 i_shdrp
[d
->this_idx
] = &d
->this_hdr
;
2853 if (d
->rel_idx
!= 0)
2854 i_shdrp
[d
->rel_idx
] = &d
->rel_hdr
;
2855 if (d
->rel_idx2
!= 0)
2856 i_shdrp
[d
->rel_idx2
] = d
->rel_hdr2
;
2858 /* Fill in the sh_link and sh_info fields while we're at it. */
2860 /* sh_link of a reloc section is the section index of the symbol
2861 table. sh_info is the section index of the section to which
2862 the relocation entries apply. */
2863 if (d
->rel_idx
!= 0)
2865 d
->rel_hdr
.sh_link
= t
->symtab_section
;
2866 d
->rel_hdr
.sh_info
= d
->this_idx
;
2868 if (d
->rel_idx2
!= 0)
2870 d
->rel_hdr2
->sh_link
= t
->symtab_section
;
2871 d
->rel_hdr2
->sh_info
= d
->this_idx
;
2874 /* We need to set up sh_link for SHF_LINK_ORDER. */
2875 if ((d
->this_hdr
.sh_flags
& SHF_LINK_ORDER
) != 0)
2877 s
= elf_linked_to_section (sec
);
2879 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
2882 struct bfd_link_order
*p
;
2884 /* Find out what the corresponding section in output
2886 for (p
= sec
->link_order_head
; p
!= NULL
; p
= p
->next
)
2888 s
= p
->u
.indirect
.section
;
2889 if (p
->type
== bfd_indirect_link_order
2890 && (bfd_get_flavour (s
->owner
)
2891 == bfd_target_elf_flavour
))
2893 Elf_Internal_Shdr
** const elf_shdrp
2894 = elf_elfsections (s
->owner
);
2896 = _bfd_elf_section_from_bfd_section (s
->owner
, s
);
2897 elfsec
= elf_shdrp
[elfsec
]->sh_link
;
2899 The Intel C compiler generates SHT_IA_64_UNWIND with
2900 SHF_LINK_ORDER. But it doesn't set theh sh_link or
2901 sh_info fields. Hence we could get the situation
2902 where elfsec is 0. */
2905 const struct elf_backend_data
*bed
2906 = get_elf_backend_data (abfd
);
2907 if (bed
->link_order_error_handler
)
2908 bed
->link_order_error_handler
2909 (_("%B: warning: sh_link not set for section `%S'"),
2914 s
= elf_shdrp
[elfsec
]->bfd_section
->output_section
;
2915 BFD_ASSERT (s
!= NULL
);
2916 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
2924 switch (d
->this_hdr
.sh_type
)
2928 /* A reloc section which we are treating as a normal BFD
2929 section. sh_link is the section index of the symbol
2930 table. sh_info is the section index of the section to
2931 which the relocation entries apply. We assume that an
2932 allocated reloc section uses the dynamic symbol table.
2933 FIXME: How can we be sure? */
2934 s
= bfd_get_section_by_name (abfd
, ".dynsym");
2936 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
2938 /* We look up the section the relocs apply to by name. */
2940 if (d
->this_hdr
.sh_type
== SHT_REL
)
2944 s
= bfd_get_section_by_name (abfd
, name
);
2946 d
->this_hdr
.sh_info
= elf_section_data (s
)->this_idx
;
2950 /* We assume that a section named .stab*str is a stabs
2951 string section. We look for a section with the same name
2952 but without the trailing ``str'', and set its sh_link
2953 field to point to this section. */
2954 if (strncmp (sec
->name
, ".stab", sizeof ".stab" - 1) == 0
2955 && strcmp (sec
->name
+ strlen (sec
->name
) - 3, "str") == 0)
2960 len
= strlen (sec
->name
);
2961 alc
= bfd_malloc (len
- 2);
2964 memcpy (alc
, sec
->name
, len
- 3);
2965 alc
[len
- 3] = '\0';
2966 s
= bfd_get_section_by_name (abfd
, alc
);
2970 elf_section_data (s
)->this_hdr
.sh_link
= d
->this_idx
;
2972 /* This is a .stab section. */
2973 if (elf_section_data (s
)->this_hdr
.sh_entsize
== 0)
2974 elf_section_data (s
)->this_hdr
.sh_entsize
2975 = 4 + 2 * bfd_get_arch_size (abfd
) / 8;
2982 case SHT_GNU_verneed
:
2983 case SHT_GNU_verdef
:
2984 /* sh_link is the section header index of the string table
2985 used for the dynamic entries, or the symbol table, or the
2987 s
= bfd_get_section_by_name (abfd
, ".dynstr");
2989 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
2992 case SHT_GNU_LIBLIST
:
2993 /* sh_link is the section header index of the prelink library
2995 used for the dynamic entries, or the symbol table, or the
2997 s
= bfd_get_section_by_name (abfd
, (sec
->flags
& SEC_ALLOC
)
2998 ? ".dynstr" : ".gnu.libstr");
3000 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
3004 case SHT_GNU_versym
:
3005 /* sh_link is the section header index of the symbol table
3006 this hash table or version table is for. */
3007 s
= bfd_get_section_by_name (abfd
, ".dynsym");
3009 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
3013 d
->this_hdr
.sh_link
= t
->symtab_section
;
3017 for (secn
= 1; secn
< section_number
; ++secn
)
3018 if (i_shdrp
[secn
] == NULL
)
3019 i_shdrp
[secn
] = i_shdrp
[0];
3021 i_shdrp
[secn
]->sh_name
= _bfd_elf_strtab_offset (elf_shstrtab (abfd
),
3022 i_shdrp
[secn
]->sh_name
);
3026 /* Map symbol from it's internal number to the external number, moving
3027 all local symbols to be at the head of the list. */
3030 sym_is_global (bfd
*abfd
, asymbol
*sym
)
3032 /* If the backend has a special mapping, use it. */
3033 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3034 if (bed
->elf_backend_sym_is_global
)
3035 return (*bed
->elf_backend_sym_is_global
) (abfd
, sym
);
3037 return ((sym
->flags
& (BSF_GLOBAL
| BSF_WEAK
)) != 0
3038 || bfd_is_und_section (bfd_get_section (sym
))
3039 || bfd_is_com_section (bfd_get_section (sym
)));
3043 elf_map_symbols (bfd
*abfd
)
3045 unsigned int symcount
= bfd_get_symcount (abfd
);
3046 asymbol
**syms
= bfd_get_outsymbols (abfd
);
3047 asymbol
**sect_syms
;
3048 unsigned int num_locals
= 0;
3049 unsigned int num_globals
= 0;
3050 unsigned int num_locals2
= 0;
3051 unsigned int num_globals2
= 0;
3059 fprintf (stderr
, "elf_map_symbols\n");
3063 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
3065 if (max_index
< asect
->index
)
3066 max_index
= asect
->index
;
3070 amt
= max_index
* sizeof (asymbol
*);
3071 sect_syms
= bfd_zalloc (abfd
, amt
);
3072 if (sect_syms
== NULL
)
3074 elf_section_syms (abfd
) = sect_syms
;
3075 elf_num_section_syms (abfd
) = max_index
;
3077 /* Init sect_syms entries for any section symbols we have already
3078 decided to output. */
3079 for (idx
= 0; idx
< symcount
; idx
++)
3081 asymbol
*sym
= syms
[idx
];
3083 if ((sym
->flags
& BSF_SECTION_SYM
) != 0
3090 if (sec
->owner
!= NULL
)
3092 if (sec
->owner
!= abfd
)
3094 if (sec
->output_offset
!= 0)
3097 sec
= sec
->output_section
;
3099 /* Empty sections in the input files may have had a
3100 section symbol created for them. (See the comment
3101 near the end of _bfd_generic_link_output_symbols in
3102 linker.c). If the linker script discards such
3103 sections then we will reach this point. Since we know
3104 that we cannot avoid this case, we detect it and skip
3105 the abort and the assignment to the sect_syms array.
3106 To reproduce this particular case try running the
3107 linker testsuite test ld-scripts/weak.exp for an ELF
3108 port that uses the generic linker. */
3109 if (sec
->owner
== NULL
)
3112 BFD_ASSERT (sec
->owner
== abfd
);
3114 sect_syms
[sec
->index
] = syms
[idx
];
3119 /* Classify all of the symbols. */
3120 for (idx
= 0; idx
< symcount
; idx
++)
3122 if (!sym_is_global (abfd
, syms
[idx
]))
3128 /* We will be adding a section symbol for each BFD section. Most normal
3129 sections will already have a section symbol in outsymbols, but
3130 eg. SHT_GROUP sections will not, and we need the section symbol mapped
3131 at least in that case. */
3132 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
3134 if (sect_syms
[asect
->index
] == NULL
)
3136 if (!sym_is_global (abfd
, asect
->symbol
))
3143 /* Now sort the symbols so the local symbols are first. */
3144 amt
= (num_locals
+ num_globals
) * sizeof (asymbol
*);
3145 new_syms
= bfd_alloc (abfd
, amt
);
3147 if (new_syms
== NULL
)
3150 for (idx
= 0; idx
< symcount
; idx
++)
3152 asymbol
*sym
= syms
[idx
];
3155 if (!sym_is_global (abfd
, sym
))
3158 i
= num_locals
+ num_globals2
++;
3160 sym
->udata
.i
= i
+ 1;
3162 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
3164 if (sect_syms
[asect
->index
] == NULL
)
3166 asymbol
*sym
= asect
->symbol
;
3169 sect_syms
[asect
->index
] = sym
;
3170 if (!sym_is_global (abfd
, sym
))
3173 i
= num_locals
+ num_globals2
++;
3175 sym
->udata
.i
= i
+ 1;
3179 bfd_set_symtab (abfd
, new_syms
, num_locals
+ num_globals
);
3181 elf_num_locals (abfd
) = num_locals
;
3182 elf_num_globals (abfd
) = num_globals
;
3186 /* Align to the maximum file alignment that could be required for any
3187 ELF data structure. */
3189 static inline file_ptr
3190 align_file_position (file_ptr off
, int align
)
3192 return (off
+ align
- 1) & ~(align
- 1);
3195 /* Assign a file position to a section, optionally aligning to the
3196 required section alignment. */
3199 _bfd_elf_assign_file_position_for_section (Elf_Internal_Shdr
*i_shdrp
,
3207 al
= i_shdrp
->sh_addralign
;
3209 offset
= BFD_ALIGN (offset
, al
);
3211 i_shdrp
->sh_offset
= offset
;
3212 if (i_shdrp
->bfd_section
!= NULL
)
3213 i_shdrp
->bfd_section
->filepos
= offset
;
3214 if (i_shdrp
->sh_type
!= SHT_NOBITS
)
3215 offset
+= i_shdrp
->sh_size
;
3219 /* Compute the file positions we are going to put the sections at, and
3220 otherwise prepare to begin writing out the ELF file. If LINK_INFO
3221 is not NULL, this is being called by the ELF backend linker. */
3224 _bfd_elf_compute_section_file_positions (bfd
*abfd
,
3225 struct bfd_link_info
*link_info
)
3227 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3229 struct bfd_strtab_hash
*strtab
;
3230 Elf_Internal_Shdr
*shstrtab_hdr
;
3232 if (abfd
->output_has_begun
)
3235 /* Do any elf backend specific processing first. */
3236 if (bed
->elf_backend_begin_write_processing
)
3237 (*bed
->elf_backend_begin_write_processing
) (abfd
, link_info
);
3239 if (! prep_headers (abfd
))
3242 /* Post process the headers if necessary. */
3243 if (bed
->elf_backend_post_process_headers
)
3244 (*bed
->elf_backend_post_process_headers
) (abfd
, link_info
);
3247 bfd_map_over_sections (abfd
, elf_fake_sections
, &failed
);
3251 if (!assign_section_numbers (abfd
))
3254 /* The backend linker builds symbol table information itself. */
3255 if (link_info
== NULL
&& bfd_get_symcount (abfd
) > 0)
3257 /* Non-zero if doing a relocatable link. */
3258 int relocatable_p
= ! (abfd
->flags
& (EXEC_P
| DYNAMIC
));
3260 if (! swap_out_syms (abfd
, &strtab
, relocatable_p
))
3264 if (link_info
== NULL
)
3266 bfd_map_over_sections (abfd
, bfd_elf_set_group_contents
, &failed
);
3271 shstrtab_hdr
= &elf_tdata (abfd
)->shstrtab_hdr
;
3272 /* sh_name was set in prep_headers. */
3273 shstrtab_hdr
->sh_type
= SHT_STRTAB
;
3274 shstrtab_hdr
->sh_flags
= 0;
3275 shstrtab_hdr
->sh_addr
= 0;
3276 shstrtab_hdr
->sh_size
= _bfd_elf_strtab_size (elf_shstrtab (abfd
));
3277 shstrtab_hdr
->sh_entsize
= 0;
3278 shstrtab_hdr
->sh_link
= 0;
3279 shstrtab_hdr
->sh_info
= 0;
3280 /* sh_offset is set in assign_file_positions_except_relocs. */
3281 shstrtab_hdr
->sh_addralign
= 1;
3283 if (!assign_file_positions_except_relocs (abfd
, link_info
))
3286 if (link_info
== NULL
&& bfd_get_symcount (abfd
) > 0)
3289 Elf_Internal_Shdr
*hdr
;
3291 off
= elf_tdata (abfd
)->next_file_pos
;
3293 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
3294 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
3296 hdr
= &elf_tdata (abfd
)->symtab_shndx_hdr
;
3297 if (hdr
->sh_size
!= 0)
3298 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
3300 hdr
= &elf_tdata (abfd
)->strtab_hdr
;
3301 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
3303 elf_tdata (abfd
)->next_file_pos
= off
;
3305 /* Now that we know where the .strtab section goes, write it
3307 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
3308 || ! _bfd_stringtab_emit (abfd
, strtab
))
3310 _bfd_stringtab_free (strtab
);
3313 abfd
->output_has_begun
= TRUE
;
3318 /* Create a mapping from a set of sections to a program segment. */
3320 static struct elf_segment_map
*
3321 make_mapping (bfd
*abfd
,
3322 asection
**sections
,
3327 struct elf_segment_map
*m
;
3332 amt
= sizeof (struct elf_segment_map
);
3333 amt
+= (to
- from
- 1) * sizeof (asection
*);
3334 m
= bfd_zalloc (abfd
, amt
);
3338 m
->p_type
= PT_LOAD
;
3339 for (i
= from
, hdrpp
= sections
+ from
; i
< to
; i
++, hdrpp
++)
3340 m
->sections
[i
- from
] = *hdrpp
;
3341 m
->count
= to
- from
;
3343 if (from
== 0 && phdr
)
3345 /* Include the headers in the first PT_LOAD segment. */
3346 m
->includes_filehdr
= 1;
3347 m
->includes_phdrs
= 1;
3353 /* Create the PT_DYNAMIC segment, which includes DYNSEC. Returns NULL
3356 struct elf_segment_map
*
3357 _bfd_elf_make_dynamic_segment (bfd
*abfd
, asection
*dynsec
)
3359 struct elf_segment_map
*m
;
3361 m
= bfd_zalloc (abfd
, sizeof (struct elf_segment_map
));
3365 m
->p_type
= PT_DYNAMIC
;
3367 m
->sections
[0] = dynsec
;
3372 /* Set up a mapping from BFD sections to program segments. */
3375 map_sections_to_segments (bfd
*abfd
)
3377 asection
**sections
= NULL
;
3381 struct elf_segment_map
*mfirst
;
3382 struct elf_segment_map
**pm
;
3383 struct elf_segment_map
*m
;
3386 unsigned int phdr_index
;
3387 bfd_vma maxpagesize
;
3389 bfd_boolean phdr_in_segment
= TRUE
;
3390 bfd_boolean writable
;
3392 asection
*first_tls
= NULL
;
3393 asection
*dynsec
, *eh_frame_hdr
;
3396 if (elf_tdata (abfd
)->segment_map
!= NULL
)
3399 if (bfd_count_sections (abfd
) == 0)
3402 /* Select the allocated sections, and sort them. */
3404 amt
= bfd_count_sections (abfd
) * sizeof (asection
*);
3405 sections
= bfd_malloc (amt
);
3406 if (sections
== NULL
)
3410 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
3412 if ((s
->flags
& SEC_ALLOC
) != 0)
3418 BFD_ASSERT (i
<= bfd_count_sections (abfd
));
3421 qsort (sections
, (size_t) count
, sizeof (asection
*), elf_sort_sections
);
3423 /* Build the mapping. */
3428 /* If we have a .interp section, then create a PT_PHDR segment for
3429 the program headers and a PT_INTERP segment for the .interp
3431 s
= bfd_get_section_by_name (abfd
, ".interp");
3432 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0)
3434 amt
= sizeof (struct elf_segment_map
);
3435 m
= bfd_zalloc (abfd
, amt
);
3439 m
->p_type
= PT_PHDR
;
3440 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
3441 m
->p_flags
= PF_R
| PF_X
;
3442 m
->p_flags_valid
= 1;
3443 m
->includes_phdrs
= 1;
3448 amt
= sizeof (struct elf_segment_map
);
3449 m
= bfd_zalloc (abfd
, amt
);
3453 m
->p_type
= PT_INTERP
;
3461 /* Look through the sections. We put sections in the same program
3462 segment when the start of the second section can be placed within
3463 a few bytes of the end of the first section. */
3467 maxpagesize
= get_elf_backend_data (abfd
)->maxpagesize
;
3469 dynsec
= bfd_get_section_by_name (abfd
, ".dynamic");
3471 && (dynsec
->flags
& SEC_LOAD
) == 0)
3474 /* Deal with -Ttext or something similar such that the first section
3475 is not adjacent to the program headers. This is an
3476 approximation, since at this point we don't know exactly how many
3477 program headers we will need. */
3480 bfd_size_type phdr_size
;
3482 phdr_size
= elf_tdata (abfd
)->program_header_size
;
3484 phdr_size
= get_elf_backend_data (abfd
)->s
->sizeof_phdr
;
3485 if ((abfd
->flags
& D_PAGED
) == 0
3486 || sections
[0]->lma
< phdr_size
3487 || sections
[0]->lma
% maxpagesize
< phdr_size
% maxpagesize
)
3488 phdr_in_segment
= FALSE
;
3491 for (i
= 0, hdrpp
= sections
; i
< count
; i
++, hdrpp
++)
3494 bfd_boolean new_segment
;
3498 /* See if this section and the last one will fit in the same
3501 if (last_hdr
== NULL
)
3503 /* If we don't have a segment yet, then we don't need a new
3504 one (we build the last one after this loop). */
3505 new_segment
= FALSE
;
3507 else if (last_hdr
->lma
- last_hdr
->vma
!= hdr
->lma
- hdr
->vma
)
3509 /* If this section has a different relation between the
3510 virtual address and the load address, then we need a new
3514 else if (BFD_ALIGN (last_hdr
->lma
+ last_size
, maxpagesize
)
3515 < BFD_ALIGN (hdr
->lma
, maxpagesize
))
3517 /* If putting this section in this segment would force us to
3518 skip a page in the segment, then we need a new segment. */
3521 else if ((last_hdr
->flags
& (SEC_LOAD
| SEC_THREAD_LOCAL
)) == 0
3522 && (hdr
->flags
& (SEC_LOAD
| SEC_THREAD_LOCAL
)) != 0)
3524 /* We don't want to put a loadable section after a
3525 nonloadable section in the same segment.
3526 Consider .tbss sections as loadable for this purpose. */
3529 else if ((abfd
->flags
& D_PAGED
) == 0)
3531 /* If the file is not demand paged, which means that we
3532 don't require the sections to be correctly aligned in the
3533 file, then there is no other reason for a new segment. */
3534 new_segment
= FALSE
;
3537 && (hdr
->flags
& SEC_READONLY
) == 0
3538 && (((last_hdr
->lma
+ last_size
- 1)
3539 & ~(maxpagesize
- 1))
3540 != (hdr
->lma
& ~(maxpagesize
- 1))))
3542 /* We don't want to put a writable section in a read only
3543 segment, unless they are on the same page in memory
3544 anyhow. We already know that the last section does not
3545 bring us past the current section on the page, so the
3546 only case in which the new section is not on the same
3547 page as the previous section is when the previous section
3548 ends precisely on a page boundary. */
3553 /* Otherwise, we can use the same segment. */
3554 new_segment
= FALSE
;
3559 if ((hdr
->flags
& SEC_READONLY
) == 0)
3562 /* .tbss sections effectively have zero size. */
3563 if ((hdr
->flags
& (SEC_THREAD_LOCAL
| SEC_LOAD
)) != SEC_THREAD_LOCAL
)
3564 last_size
= hdr
->size
;
3570 /* We need a new program segment. We must create a new program
3571 header holding all the sections from phdr_index until hdr. */
3573 m
= make_mapping (abfd
, sections
, phdr_index
, i
, phdr_in_segment
);
3580 if ((hdr
->flags
& SEC_READONLY
) == 0)
3586 /* .tbss sections effectively have zero size. */
3587 if ((hdr
->flags
& (SEC_THREAD_LOCAL
| SEC_LOAD
)) != SEC_THREAD_LOCAL
)
3588 last_size
= hdr
->size
;
3592 phdr_in_segment
= FALSE
;
3595 /* Create a final PT_LOAD program segment. */
3596 if (last_hdr
!= NULL
)
3598 m
= make_mapping (abfd
, sections
, phdr_index
, i
, phdr_in_segment
);
3606 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
3609 m
= _bfd_elf_make_dynamic_segment (abfd
, dynsec
);
3616 /* For each loadable .note section, add a PT_NOTE segment. We don't
3617 use bfd_get_section_by_name, because if we link together
3618 nonloadable .note sections and loadable .note sections, we will
3619 generate two .note sections in the output file. FIXME: Using
3620 names for section types is bogus anyhow. */
3621 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
3623 if ((s
->flags
& SEC_LOAD
) != 0
3624 && strncmp (s
->name
, ".note", 5) == 0)
3626 amt
= sizeof (struct elf_segment_map
);
3627 m
= bfd_zalloc (abfd
, amt
);
3631 m
->p_type
= PT_NOTE
;
3638 if (s
->flags
& SEC_THREAD_LOCAL
)
3646 /* If there are any SHF_TLS output sections, add PT_TLS segment. */
3651 amt
= sizeof (struct elf_segment_map
);
3652 amt
+= (tls_count
- 1) * sizeof (asection
*);
3653 m
= bfd_zalloc (abfd
, amt
);
3658 m
->count
= tls_count
;
3659 /* Mandated PF_R. */
3661 m
->p_flags_valid
= 1;
3662 for (i
= 0; i
< tls_count
; ++i
)
3664 BFD_ASSERT (first_tls
->flags
& SEC_THREAD_LOCAL
);
3665 m
->sections
[i
] = first_tls
;
3666 first_tls
= first_tls
->next
;
3673 /* If there is a .eh_frame_hdr section, throw in a PT_GNU_EH_FRAME
3675 eh_frame_hdr
= elf_tdata (abfd
)->eh_frame_hdr
;
3676 if (eh_frame_hdr
!= NULL
3677 && (eh_frame_hdr
->output_section
->flags
& SEC_LOAD
) != 0)
3679 amt
= sizeof (struct elf_segment_map
);
3680 m
= bfd_zalloc (abfd
, amt
);
3684 m
->p_type
= PT_GNU_EH_FRAME
;
3686 m
->sections
[0] = eh_frame_hdr
->output_section
;
3692 if (elf_tdata (abfd
)->stack_flags
)
3694 amt
= sizeof (struct elf_segment_map
);
3695 m
= bfd_zalloc (abfd
, amt
);
3699 m
->p_type
= PT_GNU_STACK
;
3700 m
->p_flags
= elf_tdata (abfd
)->stack_flags
;
3701 m
->p_flags_valid
= 1;
3707 if (elf_tdata (abfd
)->relro
)
3709 amt
= sizeof (struct elf_segment_map
);
3710 m
= bfd_zalloc (abfd
, amt
);
3714 m
->p_type
= PT_GNU_RELRO
;
3716 m
->p_flags_valid
= 1;
3725 elf_tdata (abfd
)->segment_map
= mfirst
;
3729 if (sections
!= NULL
)
3734 /* Sort sections by address. */
3737 elf_sort_sections (const void *arg1
, const void *arg2
)
3739 const asection
*sec1
= *(const asection
**) arg1
;
3740 const asection
*sec2
= *(const asection
**) arg2
;
3741 bfd_size_type size1
, size2
;
3743 /* Sort by LMA first, since this is the address used to
3744 place the section into a segment. */
3745 if (sec1
->lma
< sec2
->lma
)
3747 else if (sec1
->lma
> sec2
->lma
)
3750 /* Then sort by VMA. Normally the LMA and the VMA will be
3751 the same, and this will do nothing. */
3752 if (sec1
->vma
< sec2
->vma
)
3754 else if (sec1
->vma
> sec2
->vma
)
3757 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
3759 #define TOEND(x) (((x)->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0)
3765 /* If the indicies are the same, do not return 0
3766 here, but continue to try the next comparison. */
3767 if (sec1
->target_index
- sec2
->target_index
!= 0)
3768 return sec1
->target_index
- sec2
->target_index
;
3773 else if (TOEND (sec2
))
3778 /* Sort by size, to put zero sized sections
3779 before others at the same address. */
3781 size1
= (sec1
->flags
& SEC_LOAD
) ? sec1
->size
: 0;
3782 size2
= (sec2
->flags
& SEC_LOAD
) ? sec2
->size
: 0;
3789 return sec1
->target_index
- sec2
->target_index
;
3792 /* Ian Lance Taylor writes:
3794 We shouldn't be using % with a negative signed number. That's just
3795 not good. We have to make sure either that the number is not
3796 negative, or that the number has an unsigned type. When the types
3797 are all the same size they wind up as unsigned. When file_ptr is a
3798 larger signed type, the arithmetic winds up as signed long long,
3801 What we're trying to say here is something like ``increase OFF by
3802 the least amount that will cause it to be equal to the VMA modulo
3804 /* In other words, something like:
3806 vma_offset = m->sections[0]->vma % bed->maxpagesize;
3807 off_offset = off % bed->maxpagesize;
3808 if (vma_offset < off_offset)
3809 adjustment = vma_offset + bed->maxpagesize - off_offset;
3811 adjustment = vma_offset - off_offset;
3813 which can can be collapsed into the expression below. */
3816 vma_page_aligned_bias (bfd_vma vma
, ufile_ptr off
, bfd_vma maxpagesize
)
3818 return ((vma
- off
) % maxpagesize
);
3821 /* Assign file positions to the sections based on the mapping from
3822 sections to segments. This function also sets up some fields in
3823 the file header, and writes out the program headers. */
3826 assign_file_positions_for_segments (bfd
*abfd
, struct bfd_link_info
*link_info
)
3828 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3830 struct elf_segment_map
*m
;
3832 Elf_Internal_Phdr
*phdrs
;
3834 bfd_vma filehdr_vaddr
, filehdr_paddr
;
3835 bfd_vma phdrs_vaddr
, phdrs_paddr
;
3836 Elf_Internal_Phdr
*p
;
3839 if (elf_tdata (abfd
)->segment_map
== NULL
)
3841 if (! map_sections_to_segments (abfd
))
3846 /* The placement algorithm assumes that non allocated sections are
3847 not in PT_LOAD segments. We ensure this here by removing such
3848 sections from the segment map. */
3849 for (m
= elf_tdata (abfd
)->segment_map
;
3853 unsigned int new_count
;
3856 if (m
->p_type
!= PT_LOAD
)
3860 for (i
= 0; i
< m
->count
; i
++)
3862 if ((m
->sections
[i
]->flags
& SEC_ALLOC
) != 0)
3865 m
->sections
[new_count
] = m
->sections
[i
];
3871 if (new_count
!= m
->count
)
3872 m
->count
= new_count
;
3876 if (bed
->elf_backend_modify_segment_map
)
3878 if (! (*bed
->elf_backend_modify_segment_map
) (abfd
, link_info
))
3883 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
3886 elf_elfheader (abfd
)->e_phoff
= bed
->s
->sizeof_ehdr
;
3887 elf_elfheader (abfd
)->e_phentsize
= bed
->s
->sizeof_phdr
;
3888 elf_elfheader (abfd
)->e_phnum
= count
;
3892 elf_tdata (abfd
)->next_file_pos
= bed
->s
->sizeof_ehdr
;
3896 /* If we already counted the number of program segments, make sure
3897 that we allocated enough space. This happens when SIZEOF_HEADERS
3898 is used in a linker script. */
3899 alloc
= elf_tdata (abfd
)->program_header_size
/ bed
->s
->sizeof_phdr
;
3900 if (alloc
!= 0 && count
> alloc
)
3902 ((*_bfd_error_handler
)
3903 (_("%B: Not enough room for program headers (allocated %u, need %u)"),
3904 abfd
, alloc
, count
));
3905 bfd_set_error (bfd_error_bad_value
);
3912 amt
= alloc
* sizeof (Elf_Internal_Phdr
);
3913 phdrs
= bfd_alloc (abfd
, amt
);
3917 off
= bed
->s
->sizeof_ehdr
;
3918 off
+= alloc
* bed
->s
->sizeof_phdr
;
3925 for (m
= elf_tdata (abfd
)->segment_map
, p
= phdrs
;
3932 /* If elf_segment_map is not from map_sections_to_segments, the
3933 sections may not be correctly ordered. NOTE: sorting should
3934 not be done to the PT_NOTE section of a corefile, which may
3935 contain several pseudo-sections artificially created by bfd.
3936 Sorting these pseudo-sections breaks things badly. */
3938 && !(elf_elfheader (abfd
)->e_type
== ET_CORE
3939 && m
->p_type
== PT_NOTE
))
3940 qsort (m
->sections
, (size_t) m
->count
, sizeof (asection
*),
3943 /* An ELF segment (described by Elf_Internal_Phdr) may contain a
3944 number of sections with contents contributing to both p_filesz
3945 and p_memsz, followed by a number of sections with no contents
3946 that just contribute to p_memsz. In this loop, OFF tracks next
3947 available file offset for PT_LOAD and PT_NOTE segments. VOFF is
3948 an adjustment we use for segments that have no file contents
3949 but need zero filled memory allocation. */
3951 p
->p_type
= m
->p_type
;
3952 p
->p_flags
= m
->p_flags
;
3954 if (p
->p_type
== PT_LOAD
3957 bfd_size_type align
;
3960 if ((abfd
->flags
& D_PAGED
) != 0)
3961 align
= bed
->maxpagesize
;
3964 unsigned int align_power
= 0;
3965 for (i
= 0, secpp
= m
->sections
; i
< m
->count
; i
++, secpp
++)
3967 unsigned int secalign
;
3969 secalign
= bfd_get_section_alignment (abfd
, *secpp
);
3970 if (secalign
> align_power
)
3971 align_power
= secalign
;
3973 align
= (bfd_size_type
) 1 << align_power
;
3976 adjust
= vma_page_aligned_bias (m
->sections
[0]->vma
, off
, align
);
3979 && !m
->includes_filehdr
3980 && !m
->includes_phdrs
3981 && (ufile_ptr
) off
>= align
)
3983 /* If the first section isn't loadable, the same holds for
3984 any other sections. Since the segment won't need file
3985 space, we can make p_offset overlap some prior segment.
3986 However, .tbss is special. If a segment starts with
3987 .tbss, we need to look at the next section to decide
3988 whether the segment has any loadable sections. */
3990 while ((m
->sections
[i
]->flags
& SEC_LOAD
) == 0)
3992 if ((m
->sections
[i
]->flags
& SEC_THREAD_LOCAL
) == 0
3996 voff
= adjust
- align
;
4002 /* Make sure the .dynamic section is the first section in the
4003 PT_DYNAMIC segment. */
4004 else if (p
->p_type
== PT_DYNAMIC
4006 && strcmp (m
->sections
[0]->name
, ".dynamic") != 0)
4009 (_("%B: The first section in the PT_DYNAMIC segment is not the .dynamic section"),
4011 bfd_set_error (bfd_error_bad_value
);
4018 p
->p_vaddr
= m
->sections
[0]->vma
;
4020 if (m
->p_paddr_valid
)
4021 p
->p_paddr
= m
->p_paddr
;
4022 else if (m
->count
== 0)
4025 p
->p_paddr
= m
->sections
[0]->lma
;
4027 if (p
->p_type
== PT_LOAD
4028 && (abfd
->flags
& D_PAGED
) != 0)
4029 p
->p_align
= bed
->maxpagesize
;
4030 else if (m
->count
== 0)
4031 p
->p_align
= 1 << bed
->s
->log_file_align
;
4039 if (m
->includes_filehdr
)
4041 if (! m
->p_flags_valid
)
4044 p
->p_filesz
= bed
->s
->sizeof_ehdr
;
4045 p
->p_memsz
= bed
->s
->sizeof_ehdr
;
4048 BFD_ASSERT (p
->p_type
== PT_LOAD
);
4050 if (p
->p_vaddr
< (bfd_vma
) off
)
4052 (*_bfd_error_handler
)
4053 (_("%B: Not enough room for program headers, try linking with -N"),
4055 bfd_set_error (bfd_error_bad_value
);
4060 if (! m
->p_paddr_valid
)
4063 if (p
->p_type
== PT_LOAD
)
4065 filehdr_vaddr
= p
->p_vaddr
;
4066 filehdr_paddr
= p
->p_paddr
;
4070 if (m
->includes_phdrs
)
4072 if (! m
->p_flags_valid
)
4075 if (m
->includes_filehdr
)
4077 if (p
->p_type
== PT_LOAD
)
4079 phdrs_vaddr
= p
->p_vaddr
+ bed
->s
->sizeof_ehdr
;
4080 phdrs_paddr
= p
->p_paddr
+ bed
->s
->sizeof_ehdr
;
4085 p
->p_offset
= bed
->s
->sizeof_ehdr
;
4089 BFD_ASSERT (p
->p_type
== PT_LOAD
);
4090 p
->p_vaddr
-= off
- p
->p_offset
;
4091 if (! m
->p_paddr_valid
)
4092 p
->p_paddr
-= off
- p
->p_offset
;
4095 if (p
->p_type
== PT_LOAD
)
4097 phdrs_vaddr
= p
->p_vaddr
;
4098 phdrs_paddr
= p
->p_paddr
;
4101 phdrs_vaddr
= bed
->maxpagesize
+ bed
->s
->sizeof_ehdr
;
4104 p
->p_filesz
+= alloc
* bed
->s
->sizeof_phdr
;
4105 p
->p_memsz
+= alloc
* bed
->s
->sizeof_phdr
;
4108 if (p
->p_type
== PT_LOAD
4109 || (p
->p_type
== PT_NOTE
&& bfd_get_format (abfd
) == bfd_core
))
4111 if (! m
->includes_filehdr
&& ! m
->includes_phdrs
)
4112 p
->p_offset
= off
+ voff
;
4117 adjust
= off
- (p
->p_offset
+ p
->p_filesz
);
4118 p
->p_filesz
+= adjust
;
4119 p
->p_memsz
+= adjust
;
4123 for (i
= 0, secpp
= m
->sections
; i
< m
->count
; i
++, secpp
++)
4127 bfd_size_type align
;
4131 align
= 1 << bfd_get_section_alignment (abfd
, sec
);
4133 if (p
->p_type
== PT_LOAD
4134 || p
->p_type
== PT_TLS
)
4136 bfd_signed_vma adjust
;
4138 if ((flags
& SEC_LOAD
) != 0)
4140 adjust
= sec
->lma
- (p
->p_paddr
+ p
->p_filesz
);
4143 (*_bfd_error_handler
)
4144 (_("%B: section %A lma 0x%lx overlaps previous sections"),
4145 abfd
, sec
, (unsigned long) sec
->lma
);
4149 p
->p_filesz
+= adjust
;
4150 p
->p_memsz
+= adjust
;
4152 /* .tbss is special. It doesn't contribute to p_memsz of
4154 else if ((flags
& SEC_THREAD_LOCAL
) == 0
4155 || p
->p_type
== PT_TLS
)
4157 /* The section VMA must equal the file position
4158 modulo the page size. */
4159 bfd_size_type page
= align
;
4160 if ((abfd
->flags
& D_PAGED
) != 0)
4161 page
= bed
->maxpagesize
;
4162 adjust
= vma_page_aligned_bias (sec
->vma
,
4163 p
->p_vaddr
+ p
->p_memsz
,
4165 p
->p_memsz
+= adjust
;
4169 if (p
->p_type
== PT_NOTE
&& bfd_get_format (abfd
) == bfd_core
)
4171 /* The section at i == 0 is the one that actually contains
4177 p
->p_filesz
= sec
->size
;
4183 /* The rest are fake sections that shouldn't be written. */
4192 if (p
->p_type
== PT_LOAD
)
4195 /* FIXME: The SEC_HAS_CONTENTS test here dates back to
4196 1997, and the exact reason for it isn't clear. One
4197 plausible explanation is that it is to work around
4198 a problem we have with linker scripts using data
4199 statements in NOLOAD sections. I don't think it
4200 makes a great deal of sense to have such a section
4201 assigned to a PT_LOAD segment, but apparently
4202 people do this. The data statement results in a
4203 bfd_data_link_order being built, and these need
4204 section contents to write into. Eventually, we get
4205 to _bfd_elf_write_object_contents which writes any
4206 section with contents to the output. Make room
4207 here for the write, so that following segments are
4209 if ((flags
& SEC_LOAD
) != 0
4210 || (flags
& SEC_HAS_CONTENTS
) != 0)
4214 if ((flags
& SEC_LOAD
) != 0)
4216 p
->p_filesz
+= sec
->size
;
4217 p
->p_memsz
+= sec
->size
;
4219 /* .tbss is special. It doesn't contribute to p_memsz of
4221 else if ((flags
& SEC_THREAD_LOCAL
) == 0
4222 || p
->p_type
== PT_TLS
)
4223 p
->p_memsz
+= sec
->size
;
4225 if (p
->p_type
== PT_TLS
4227 && (sec
->flags
& SEC_HAS_CONTENTS
) == 0)
4229 struct bfd_link_order
*o
;
4230 bfd_vma tbss_size
= 0;
4232 for (o
= sec
->link_order_head
; o
!= NULL
; o
= o
->next
)
4233 if (tbss_size
< o
->offset
+ o
->size
)
4234 tbss_size
= o
->offset
+ o
->size
;
4236 p
->p_memsz
+= tbss_size
;
4239 if (align
> p
->p_align
4240 && (p
->p_type
!= PT_LOAD
|| (abfd
->flags
& D_PAGED
) == 0))
4244 if (! m
->p_flags_valid
)
4247 if ((flags
& SEC_CODE
) != 0)
4249 if ((flags
& SEC_READONLY
) == 0)
4255 /* Now that we have set the section file positions, we can set up
4256 the file positions for the non PT_LOAD segments. */
4257 for (m
= elf_tdata (abfd
)->segment_map
, p
= phdrs
;
4261 if (p
->p_type
!= PT_LOAD
&& m
->count
> 0)
4263 BFD_ASSERT (! m
->includes_filehdr
&& ! m
->includes_phdrs
);
4264 /* If the section has not yet been assigned a file position,
4265 do so now. The ARM BPABI requires that .dynamic section
4266 not be marked SEC_ALLOC because it is not part of any
4267 PT_LOAD segment, so it will not be processed above. */
4268 if (p
->p_type
== PT_DYNAMIC
&& m
->sections
[0]->filepos
== 0)
4271 Elf_Internal_Shdr
** const i_shdrpp
= elf_elfsections (abfd
);
4274 while (i_shdrpp
[i
]->bfd_section
!= m
->sections
[0])
4276 off
= (_bfd_elf_assign_file_position_for_section
4277 (i_shdrpp
[i
], off
, TRUE
));
4278 p
->p_filesz
= m
->sections
[0]->size
;
4280 p
->p_offset
= m
->sections
[0]->filepos
;
4284 if (m
->includes_filehdr
)
4286 p
->p_vaddr
= filehdr_vaddr
;
4287 if (! m
->p_paddr_valid
)
4288 p
->p_paddr
= filehdr_paddr
;
4290 else if (m
->includes_phdrs
)
4292 p
->p_vaddr
= phdrs_vaddr
;
4293 if (! m
->p_paddr_valid
)
4294 p
->p_paddr
= phdrs_paddr
;
4296 else if (p
->p_type
== PT_GNU_RELRO
)
4298 Elf_Internal_Phdr
*lp
;
4300 for (lp
= phdrs
; lp
< phdrs
+ count
; ++lp
)
4302 if (lp
->p_type
== PT_LOAD
4303 && lp
->p_vaddr
<= link_info
->relro_end
4304 && lp
->p_vaddr
>= link_info
->relro_start
4305 && lp
->p_vaddr
+ lp
->p_filesz
4306 >= link_info
->relro_end
)
4310 if (lp
< phdrs
+ count
4311 && link_info
->relro_end
> lp
->p_vaddr
)
4313 p
->p_vaddr
= lp
->p_vaddr
;
4314 p
->p_paddr
= lp
->p_paddr
;
4315 p
->p_offset
= lp
->p_offset
;
4316 p
->p_filesz
= link_info
->relro_end
- lp
->p_vaddr
;
4317 p
->p_memsz
= p
->p_filesz
;
4319 p
->p_flags
= (lp
->p_flags
& ~PF_W
);
4323 memset (p
, 0, sizeof *p
);
4324 p
->p_type
= PT_NULL
;
4330 /* Clear out any program headers we allocated but did not use. */
4331 for (; count
< alloc
; count
++, p
++)
4333 memset (p
, 0, sizeof *p
);
4334 p
->p_type
= PT_NULL
;
4337 elf_tdata (abfd
)->phdr
= phdrs
;
4339 elf_tdata (abfd
)->next_file_pos
= off
;
4341 /* Write out the program headers. */
4342 if (bfd_seek (abfd
, (bfd_signed_vma
) bed
->s
->sizeof_ehdr
, SEEK_SET
) != 0
4343 || bed
->s
->write_out_phdrs (abfd
, phdrs
, alloc
) != 0)
4349 /* Get the size of the program header.
4351 If this is called by the linker before any of the section VMA's are set, it
4352 can't calculate the correct value for a strange memory layout. This only
4353 happens when SIZEOF_HEADERS is used in a linker script. In this case,
4354 SORTED_HDRS is NULL and we assume the normal scenario of one text and one
4355 data segment (exclusive of .interp and .dynamic).
4357 ??? User written scripts must either not use SIZEOF_HEADERS, or assume there
4358 will be two segments. */
4360 static bfd_size_type
4361 get_program_header_size (bfd
*abfd
)
4365 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4367 /* We can't return a different result each time we're called. */
4368 if (elf_tdata (abfd
)->program_header_size
!= 0)
4369 return elf_tdata (abfd
)->program_header_size
;
4371 if (elf_tdata (abfd
)->segment_map
!= NULL
)
4373 struct elf_segment_map
*m
;
4376 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
4378 elf_tdata (abfd
)->program_header_size
= segs
* bed
->s
->sizeof_phdr
;
4379 return elf_tdata (abfd
)->program_header_size
;
4382 /* Assume we will need exactly two PT_LOAD segments: one for text
4383 and one for data. */
4386 s
= bfd_get_section_by_name (abfd
, ".interp");
4387 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0)
4389 /* If we have a loadable interpreter section, we need a
4390 PT_INTERP segment. In this case, assume we also need a
4391 PT_PHDR segment, although that may not be true for all
4396 if (bfd_get_section_by_name (abfd
, ".dynamic") != NULL
)
4398 /* We need a PT_DYNAMIC segment. */
4402 if (elf_tdata (abfd
)->eh_frame_hdr
)
4404 /* We need a PT_GNU_EH_FRAME segment. */
4408 if (elf_tdata (abfd
)->stack_flags
)
4410 /* We need a PT_GNU_STACK segment. */
4414 if (elf_tdata (abfd
)->relro
)
4416 /* We need a PT_GNU_RELRO segment. */
4420 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
4422 if ((s
->flags
& SEC_LOAD
) != 0
4423 && strncmp (s
->name
, ".note", 5) == 0)
4425 /* We need a PT_NOTE segment. */
4430 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
4432 if (s
->flags
& SEC_THREAD_LOCAL
)
4434 /* We need a PT_TLS segment. */
4440 /* Let the backend count up any program headers it might need. */
4441 if (bed
->elf_backend_additional_program_headers
)
4445 a
= (*bed
->elf_backend_additional_program_headers
) (abfd
);
4451 elf_tdata (abfd
)->program_header_size
= segs
* bed
->s
->sizeof_phdr
;
4452 return elf_tdata (abfd
)->program_header_size
;
4455 /* Work out the file positions of all the sections. This is called by
4456 _bfd_elf_compute_section_file_positions. All the section sizes and
4457 VMAs must be known before this is called.
4459 Reloc sections come in two flavours: Those processed specially as
4460 "side-channel" data attached to a section to which they apply, and
4461 those that bfd doesn't process as relocations. The latter sort are
4462 stored in a normal bfd section by bfd_section_from_shdr. We don't
4463 consider the former sort here, unless they form part of the loadable
4464 image. Reloc sections not assigned here will be handled later by
4465 assign_file_positions_for_relocs.
4467 We also don't set the positions of the .symtab and .strtab here. */
4470 assign_file_positions_except_relocs (bfd
*abfd
,
4471 struct bfd_link_info
*link_info
)
4473 struct elf_obj_tdata
* const tdata
= elf_tdata (abfd
);
4474 Elf_Internal_Ehdr
* const i_ehdrp
= elf_elfheader (abfd
);
4475 Elf_Internal_Shdr
** const i_shdrpp
= elf_elfsections (abfd
);
4476 unsigned int num_sec
= elf_numsections (abfd
);
4478 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4480 if ((abfd
->flags
& (EXEC_P
| DYNAMIC
)) == 0
4481 && bfd_get_format (abfd
) != bfd_core
)
4483 Elf_Internal_Shdr
**hdrpp
;
4486 /* Start after the ELF header. */
4487 off
= i_ehdrp
->e_ehsize
;
4489 /* We are not creating an executable, which means that we are
4490 not creating a program header, and that the actual order of
4491 the sections in the file is unimportant. */
4492 for (i
= 1, hdrpp
= i_shdrpp
+ 1; i
< num_sec
; i
++, hdrpp
++)
4494 Elf_Internal_Shdr
*hdr
;
4497 if (((hdr
->sh_type
== SHT_REL
|| hdr
->sh_type
== SHT_RELA
)
4498 && hdr
->bfd_section
== NULL
)
4499 || i
== tdata
->symtab_section
4500 || i
== tdata
->symtab_shndx_section
4501 || i
== tdata
->strtab_section
)
4503 hdr
->sh_offset
= -1;
4506 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
4508 if (i
== SHN_LORESERVE
- 1)
4510 i
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4511 hdrpp
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4518 Elf_Internal_Shdr
**hdrpp
;
4520 /* Assign file positions for the loaded sections based on the
4521 assignment of sections to segments. */
4522 if (! assign_file_positions_for_segments (abfd
, link_info
))
4525 /* Assign file positions for the other sections. */
4527 off
= elf_tdata (abfd
)->next_file_pos
;
4528 for (i
= 1, hdrpp
= i_shdrpp
+ 1; i
< num_sec
; i
++, hdrpp
++)
4530 Elf_Internal_Shdr
*hdr
;
4533 if (hdr
->bfd_section
!= NULL
4534 && hdr
->bfd_section
->filepos
!= 0)
4535 hdr
->sh_offset
= hdr
->bfd_section
->filepos
;
4536 else if ((hdr
->sh_flags
& SHF_ALLOC
) != 0)
4538 ((*_bfd_error_handler
)
4539 (_("%B: warning: allocated section `%s' not in segment"),
4541 (hdr
->bfd_section
== NULL
4543 : hdr
->bfd_section
->name
)));
4544 if ((abfd
->flags
& D_PAGED
) != 0)
4545 off
+= vma_page_aligned_bias (hdr
->sh_addr
, off
,
4548 off
+= vma_page_aligned_bias (hdr
->sh_addr
, off
,
4550 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
,
4553 else if (((hdr
->sh_type
== SHT_REL
|| hdr
->sh_type
== SHT_RELA
)
4554 && hdr
->bfd_section
== NULL
)
4555 || hdr
== i_shdrpp
[tdata
->symtab_section
]
4556 || hdr
== i_shdrpp
[tdata
->symtab_shndx_section
]
4557 || hdr
== i_shdrpp
[tdata
->strtab_section
])
4558 hdr
->sh_offset
= -1;
4560 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
4562 if (i
== SHN_LORESERVE
- 1)
4564 i
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4565 hdrpp
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4570 /* Place the section headers. */
4571 off
= align_file_position (off
, 1 << bed
->s
->log_file_align
);
4572 i_ehdrp
->e_shoff
= off
;
4573 off
+= i_ehdrp
->e_shnum
* i_ehdrp
->e_shentsize
;
4575 elf_tdata (abfd
)->next_file_pos
= off
;
4581 prep_headers (bfd
*abfd
)
4583 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
4584 Elf_Internal_Phdr
*i_phdrp
= 0; /* Program header table, internal form */
4585 Elf_Internal_Shdr
**i_shdrp
; /* Section header table, internal form */
4586 struct elf_strtab_hash
*shstrtab
;
4587 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4589 i_ehdrp
= elf_elfheader (abfd
);
4590 i_shdrp
= elf_elfsections (abfd
);
4592 shstrtab
= _bfd_elf_strtab_init ();
4593 if (shstrtab
== NULL
)
4596 elf_shstrtab (abfd
) = shstrtab
;
4598 i_ehdrp
->e_ident
[EI_MAG0
] = ELFMAG0
;
4599 i_ehdrp
->e_ident
[EI_MAG1
] = ELFMAG1
;
4600 i_ehdrp
->e_ident
[EI_MAG2
] = ELFMAG2
;
4601 i_ehdrp
->e_ident
[EI_MAG3
] = ELFMAG3
;
4603 i_ehdrp
->e_ident
[EI_CLASS
] = bed
->s
->elfclass
;
4604 i_ehdrp
->e_ident
[EI_DATA
] =
4605 bfd_big_endian (abfd
) ? ELFDATA2MSB
: ELFDATA2LSB
;
4606 i_ehdrp
->e_ident
[EI_VERSION
] = bed
->s
->ev_current
;
4608 if ((abfd
->flags
& DYNAMIC
) != 0)
4609 i_ehdrp
->e_type
= ET_DYN
;
4610 else if ((abfd
->flags
& EXEC_P
) != 0)
4611 i_ehdrp
->e_type
= ET_EXEC
;
4612 else if (bfd_get_format (abfd
) == bfd_core
)
4613 i_ehdrp
->e_type
= ET_CORE
;
4615 i_ehdrp
->e_type
= ET_REL
;
4617 switch (bfd_get_arch (abfd
))
4619 case bfd_arch_unknown
:
4620 i_ehdrp
->e_machine
= EM_NONE
;
4623 /* There used to be a long list of cases here, each one setting
4624 e_machine to the same EM_* macro #defined as ELF_MACHINE_CODE
4625 in the corresponding bfd definition. To avoid duplication,
4626 the switch was removed. Machines that need special handling
4627 can generally do it in elf_backend_final_write_processing(),
4628 unless they need the information earlier than the final write.
4629 Such need can generally be supplied by replacing the tests for
4630 e_machine with the conditions used to determine it. */
4632 i_ehdrp
->e_machine
= bed
->elf_machine_code
;
4635 i_ehdrp
->e_version
= bed
->s
->ev_current
;
4636 i_ehdrp
->e_ehsize
= bed
->s
->sizeof_ehdr
;
4638 /* No program header, for now. */
4639 i_ehdrp
->e_phoff
= 0;
4640 i_ehdrp
->e_phentsize
= 0;
4641 i_ehdrp
->e_phnum
= 0;
4643 /* Each bfd section is section header entry. */
4644 i_ehdrp
->e_entry
= bfd_get_start_address (abfd
);
4645 i_ehdrp
->e_shentsize
= bed
->s
->sizeof_shdr
;
4647 /* If we're building an executable, we'll need a program header table. */
4648 if (abfd
->flags
& EXEC_P
)
4650 /* It all happens later. */
4652 i_ehdrp
->e_phentsize
= sizeof (Elf_External_Phdr
);
4654 /* elf_build_phdrs() returns a (NULL-terminated) array of
4655 Elf_Internal_Phdrs. */
4656 i_phdrp
= elf_build_phdrs (abfd
, i_ehdrp
, i_shdrp
, &i_ehdrp
->e_phnum
);
4657 i_ehdrp
->e_phoff
= outbase
;
4658 outbase
+= i_ehdrp
->e_phentsize
* i_ehdrp
->e_phnum
;
4663 i_ehdrp
->e_phentsize
= 0;
4665 i_ehdrp
->e_phoff
= 0;
4668 elf_tdata (abfd
)->symtab_hdr
.sh_name
=
4669 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".symtab", FALSE
);
4670 elf_tdata (abfd
)->strtab_hdr
.sh_name
=
4671 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".strtab", FALSE
);
4672 elf_tdata (abfd
)->shstrtab_hdr
.sh_name
=
4673 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".shstrtab", FALSE
);
4674 if (elf_tdata (abfd
)->symtab_hdr
.sh_name
== (unsigned int) -1
4675 || elf_tdata (abfd
)->symtab_hdr
.sh_name
== (unsigned int) -1
4676 || elf_tdata (abfd
)->shstrtab_hdr
.sh_name
== (unsigned int) -1)
4682 /* Assign file positions for all the reloc sections which are not part
4683 of the loadable file image. */
4686 _bfd_elf_assign_file_positions_for_relocs (bfd
*abfd
)
4689 unsigned int i
, num_sec
;
4690 Elf_Internal_Shdr
**shdrpp
;
4692 off
= elf_tdata (abfd
)->next_file_pos
;
4694 num_sec
= elf_numsections (abfd
);
4695 for (i
= 1, shdrpp
= elf_elfsections (abfd
) + 1; i
< num_sec
; i
++, shdrpp
++)
4697 Elf_Internal_Shdr
*shdrp
;
4700 if ((shdrp
->sh_type
== SHT_REL
|| shdrp
->sh_type
== SHT_RELA
)
4701 && shdrp
->sh_offset
== -1)
4702 off
= _bfd_elf_assign_file_position_for_section (shdrp
, off
, TRUE
);
4705 elf_tdata (abfd
)->next_file_pos
= off
;
4709 _bfd_elf_write_object_contents (bfd
*abfd
)
4711 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4712 Elf_Internal_Ehdr
*i_ehdrp
;
4713 Elf_Internal_Shdr
**i_shdrp
;
4715 unsigned int count
, num_sec
;
4717 if (! abfd
->output_has_begun
4718 && ! _bfd_elf_compute_section_file_positions (abfd
, NULL
))
4721 i_shdrp
= elf_elfsections (abfd
);
4722 i_ehdrp
= elf_elfheader (abfd
);
4725 bfd_map_over_sections (abfd
, bed
->s
->write_relocs
, &failed
);
4729 _bfd_elf_assign_file_positions_for_relocs (abfd
);
4731 /* After writing the headers, we need to write the sections too... */
4732 num_sec
= elf_numsections (abfd
);
4733 for (count
= 1; count
< num_sec
; count
++)
4735 if (bed
->elf_backend_section_processing
)
4736 (*bed
->elf_backend_section_processing
) (abfd
, i_shdrp
[count
]);
4737 if (i_shdrp
[count
]->contents
)
4739 bfd_size_type amt
= i_shdrp
[count
]->sh_size
;
4741 if (bfd_seek (abfd
, i_shdrp
[count
]->sh_offset
, SEEK_SET
) != 0
4742 || bfd_bwrite (i_shdrp
[count
]->contents
, amt
, abfd
) != amt
)
4745 if (count
== SHN_LORESERVE
- 1)
4746 count
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4749 /* Write out the section header names. */
4750 if (bfd_seek (abfd
, elf_tdata (abfd
)->shstrtab_hdr
.sh_offset
, SEEK_SET
) != 0
4751 || ! _bfd_elf_strtab_emit (abfd
, elf_shstrtab (abfd
)))
4754 if (bed
->elf_backend_final_write_processing
)
4755 (*bed
->elf_backend_final_write_processing
) (abfd
,
4756 elf_tdata (abfd
)->linker
);
4758 return bed
->s
->write_shdrs_and_ehdr (abfd
);
4762 _bfd_elf_write_corefile_contents (bfd
*abfd
)
4764 /* Hopefully this can be done just like an object file. */
4765 return _bfd_elf_write_object_contents (abfd
);
4768 /* Given a section, search the header to find them. */
4771 _bfd_elf_section_from_bfd_section (bfd
*abfd
, struct bfd_section
*asect
)
4773 const struct elf_backend_data
*bed
;
4776 if (elf_section_data (asect
) != NULL
4777 && elf_section_data (asect
)->this_idx
!= 0)
4778 return elf_section_data (asect
)->this_idx
;
4780 if (bfd_is_abs_section (asect
))
4782 else if (bfd_is_com_section (asect
))
4784 else if (bfd_is_und_section (asect
))
4788 Elf_Internal_Shdr
**i_shdrp
= elf_elfsections (abfd
);
4789 int maxindex
= elf_numsections (abfd
);
4791 for (index
= 1; index
< maxindex
; index
++)
4793 Elf_Internal_Shdr
*hdr
= i_shdrp
[index
];
4795 if (hdr
!= NULL
&& hdr
->bfd_section
== asect
)
4801 bed
= get_elf_backend_data (abfd
);
4802 if (bed
->elf_backend_section_from_bfd_section
)
4806 if ((*bed
->elf_backend_section_from_bfd_section
) (abfd
, asect
, &retval
))
4811 bfd_set_error (bfd_error_nonrepresentable_section
);
4816 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
4820 _bfd_elf_symbol_from_bfd_symbol (bfd
*abfd
, asymbol
**asym_ptr_ptr
)
4822 asymbol
*asym_ptr
= *asym_ptr_ptr
;
4824 flagword flags
= asym_ptr
->flags
;
4826 /* When gas creates relocations against local labels, it creates its
4827 own symbol for the section, but does put the symbol into the
4828 symbol chain, so udata is 0. When the linker is generating
4829 relocatable output, this section symbol may be for one of the
4830 input sections rather than the output section. */
4831 if (asym_ptr
->udata
.i
== 0
4832 && (flags
& BSF_SECTION_SYM
)
4833 && asym_ptr
->section
)
4837 if (asym_ptr
->section
->output_section
!= NULL
)
4838 indx
= asym_ptr
->section
->output_section
->index
;
4840 indx
= asym_ptr
->section
->index
;
4841 if (indx
< elf_num_section_syms (abfd
)
4842 && elf_section_syms (abfd
)[indx
] != NULL
)
4843 asym_ptr
->udata
.i
= elf_section_syms (abfd
)[indx
]->udata
.i
;
4846 idx
= asym_ptr
->udata
.i
;
4850 /* This case can occur when using --strip-symbol on a symbol
4851 which is used in a relocation entry. */
4852 (*_bfd_error_handler
)
4853 (_("%B: symbol `%s' required but not present"),
4854 abfd
, bfd_asymbol_name (asym_ptr
));
4855 bfd_set_error (bfd_error_no_symbols
);
4862 "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n",
4863 (long) asym_ptr
, asym_ptr
->name
, idx
, flags
,
4864 elf_symbol_flags (flags
));
4872 /* Copy private BFD data. This copies any program header information. */
4875 copy_private_bfd_data (bfd
*ibfd
, bfd
*obfd
)
4877 Elf_Internal_Ehdr
*iehdr
;
4878 struct elf_segment_map
*map
;
4879 struct elf_segment_map
*map_first
;
4880 struct elf_segment_map
**pointer_to_map
;
4881 Elf_Internal_Phdr
*segment
;
4884 unsigned int num_segments
;
4885 bfd_boolean phdr_included
= FALSE
;
4886 bfd_vma maxpagesize
;
4887 struct elf_segment_map
*phdr_adjust_seg
= NULL
;
4888 unsigned int phdr_adjust_num
= 0;
4889 const struct elf_backend_data
*bed
;
4891 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
4892 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
4895 if (elf_tdata (ibfd
)->phdr
== NULL
)
4898 bed
= get_elf_backend_data (ibfd
);
4899 iehdr
= elf_elfheader (ibfd
);
4902 pointer_to_map
= &map_first
;
4904 num_segments
= elf_elfheader (ibfd
)->e_phnum
;
4905 maxpagesize
= get_elf_backend_data (obfd
)->maxpagesize
;
4907 /* Returns the end address of the segment + 1. */
4908 #define SEGMENT_END(segment, start) \
4909 (start + (segment->p_memsz > segment->p_filesz \
4910 ? segment->p_memsz : segment->p_filesz))
4912 #define SECTION_SIZE(section, segment) \
4913 (((section->flags & (SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) \
4914 != SEC_THREAD_LOCAL || segment->p_type == PT_TLS) \
4915 ? section->size : 0)
4917 /* Returns TRUE if the given section is contained within
4918 the given segment. VMA addresses are compared. */
4919 #define IS_CONTAINED_BY_VMA(section, segment) \
4920 (section->vma >= segment->p_vaddr \
4921 && (section->vma + SECTION_SIZE (section, segment) \
4922 <= (SEGMENT_END (segment, segment->p_vaddr))))
4924 /* Returns TRUE if the given section is contained within
4925 the given segment. LMA addresses are compared. */
4926 #define IS_CONTAINED_BY_LMA(section, segment, base) \
4927 (section->lma >= base \
4928 && (section->lma + SECTION_SIZE (section, segment) \
4929 <= SEGMENT_END (segment, base)))
4931 /* Special case: corefile "NOTE" section containing regs, prpsinfo etc. */
4932 #define IS_COREFILE_NOTE(p, s) \
4933 (p->p_type == PT_NOTE \
4934 && bfd_get_format (ibfd) == bfd_core \
4935 && s->vma == 0 && s->lma == 0 \
4936 && (bfd_vma) s->filepos >= p->p_offset \
4937 && ((bfd_vma) s->filepos + s->size \
4938 <= p->p_offset + p->p_filesz))
4940 /* The complicated case when p_vaddr is 0 is to handle the Solaris
4941 linker, which generates a PT_INTERP section with p_vaddr and
4942 p_memsz set to 0. */
4943 #define IS_SOLARIS_PT_INTERP(p, s) \
4945 && p->p_paddr == 0 \
4946 && p->p_memsz == 0 \
4947 && p->p_filesz > 0 \
4948 && (s->flags & SEC_HAS_CONTENTS) != 0 \
4950 && (bfd_vma) s->filepos >= p->p_offset \
4951 && ((bfd_vma) s->filepos + s->size \
4952 <= p->p_offset + p->p_filesz))
4954 /* Decide if the given section should be included in the given segment.
4955 A section will be included if:
4956 1. It is within the address space of the segment -- we use the LMA
4957 if that is set for the segment and the VMA otherwise,
4958 2. It is an allocated segment,
4959 3. There is an output section associated with it,
4960 4. The section has not already been allocated to a previous segment.
4961 5. PT_GNU_STACK segments do not include any sections.
4962 6. PT_TLS segment includes only SHF_TLS sections.
4963 7. SHF_TLS sections are only in PT_TLS or PT_LOAD segments. */
4964 #define INCLUDE_SECTION_IN_SEGMENT(section, segment, bed) \
4965 ((((segment->p_paddr \
4966 ? IS_CONTAINED_BY_LMA (section, segment, segment->p_paddr) \
4967 : IS_CONTAINED_BY_VMA (section, segment)) \
4968 && (section->flags & SEC_ALLOC) != 0) \
4969 || IS_COREFILE_NOTE (segment, section)) \
4970 && section->output_section != NULL \
4971 && segment->p_type != PT_GNU_STACK \
4972 && (segment->p_type != PT_TLS \
4973 || (section->flags & SEC_THREAD_LOCAL)) \
4974 && (segment->p_type == PT_LOAD \
4975 || segment->p_type == PT_TLS \
4976 || (section->flags & SEC_THREAD_LOCAL) == 0) \
4977 && ! section->segment_mark)
4979 /* Returns TRUE iff seg1 starts after the end of seg2. */
4980 #define SEGMENT_AFTER_SEGMENT(seg1, seg2, field) \
4981 (seg1->field >= SEGMENT_END (seg2, seg2->field))
4983 /* Returns TRUE iff seg1 and seg2 overlap. Segments overlap iff both
4984 their VMA address ranges and their LMA address ranges overlap.
4985 It is possible to have overlapping VMA ranges without overlapping LMA
4986 ranges. RedBoot images for example can have both .data and .bss mapped
4987 to the same VMA range, but with the .data section mapped to a different
4989 #define SEGMENT_OVERLAPS(seg1, seg2) \
4990 ( !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_vaddr) \
4991 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_vaddr)) \
4992 && !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_paddr) \
4993 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_paddr)))
4995 /* Initialise the segment mark field. */
4996 for (section
= ibfd
->sections
; section
!= NULL
; section
= section
->next
)
4997 section
->segment_mark
= FALSE
;
4999 /* Scan through the segments specified in the program header
5000 of the input BFD. For this first scan we look for overlaps
5001 in the loadable segments. These can be created by weird
5002 parameters to objcopy. Also, fix some solaris weirdness. */
5003 for (i
= 0, segment
= elf_tdata (ibfd
)->phdr
;
5008 Elf_Internal_Phdr
*segment2
;
5010 if (segment
->p_type
== PT_INTERP
)
5011 for (section
= ibfd
->sections
; section
; section
= section
->next
)
5012 if (IS_SOLARIS_PT_INTERP (segment
, section
))
5014 /* Mininal change so that the normal section to segment
5015 assignment code will work. */
5016 segment
->p_vaddr
= section
->vma
;
5020 if (segment
->p_type
!= PT_LOAD
)
5023 /* Determine if this segment overlaps any previous segments. */
5024 for (j
= 0, segment2
= elf_tdata (ibfd
)->phdr
; j
< i
; j
++, segment2
++)
5026 bfd_signed_vma extra_length
;
5028 if (segment2
->p_type
!= PT_LOAD
5029 || ! SEGMENT_OVERLAPS (segment
, segment2
))
5032 /* Merge the two segments together. */
5033 if (segment2
->p_vaddr
< segment
->p_vaddr
)
5035 /* Extend SEGMENT2 to include SEGMENT and then delete
5038 SEGMENT_END (segment
, segment
->p_vaddr
)
5039 - SEGMENT_END (segment2
, segment2
->p_vaddr
);
5041 if (extra_length
> 0)
5043 segment2
->p_memsz
+= extra_length
;
5044 segment2
->p_filesz
+= extra_length
;
5047 segment
->p_type
= PT_NULL
;
5049 /* Since we have deleted P we must restart the outer loop. */
5051 segment
= elf_tdata (ibfd
)->phdr
;
5056 /* Extend SEGMENT to include SEGMENT2 and then delete
5059 SEGMENT_END (segment2
, segment2
->p_vaddr
)
5060 - SEGMENT_END (segment
, segment
->p_vaddr
);
5062 if (extra_length
> 0)
5064 segment
->p_memsz
+= extra_length
;
5065 segment
->p_filesz
+= extra_length
;
5068 segment2
->p_type
= PT_NULL
;
5073 /* The second scan attempts to assign sections to segments. */
5074 for (i
= 0, segment
= elf_tdata (ibfd
)->phdr
;
5078 unsigned int section_count
;
5079 asection
** sections
;
5080 asection
* output_section
;
5082 bfd_vma matching_lma
;
5083 bfd_vma suggested_lma
;
5087 if (segment
->p_type
== PT_NULL
)
5090 /* Compute how many sections might be placed into this segment. */
5091 for (section
= ibfd
->sections
, section_count
= 0;
5093 section
= section
->next
)
5094 if (INCLUDE_SECTION_IN_SEGMENT (section
, segment
, bed
))
5097 /* Allocate a segment map big enough to contain
5098 all of the sections we have selected. */
5099 amt
= sizeof (struct elf_segment_map
);
5100 amt
+= ((bfd_size_type
) section_count
- 1) * sizeof (asection
*);
5101 map
= bfd_alloc (obfd
, amt
);
5105 /* Initialise the fields of the segment map. Default to
5106 using the physical address of the segment in the input BFD. */
5108 map
->p_type
= segment
->p_type
;
5109 map
->p_flags
= segment
->p_flags
;
5110 map
->p_flags_valid
= 1;
5111 map
->p_paddr
= segment
->p_paddr
;
5112 map
->p_paddr_valid
= 1;
5114 /* Determine if this segment contains the ELF file header
5115 and if it contains the program headers themselves. */
5116 map
->includes_filehdr
= (segment
->p_offset
== 0
5117 && segment
->p_filesz
>= iehdr
->e_ehsize
);
5119 map
->includes_phdrs
= 0;
5121 if (! phdr_included
|| segment
->p_type
!= PT_LOAD
)
5123 map
->includes_phdrs
=
5124 (segment
->p_offset
<= (bfd_vma
) iehdr
->e_phoff
5125 && (segment
->p_offset
+ segment
->p_filesz
5126 >= ((bfd_vma
) iehdr
->e_phoff
5127 + iehdr
->e_phnum
* iehdr
->e_phentsize
)));
5129 if (segment
->p_type
== PT_LOAD
&& map
->includes_phdrs
)
5130 phdr_included
= TRUE
;
5133 if (section_count
== 0)
5135 /* Special segments, such as the PT_PHDR segment, may contain
5136 no sections, but ordinary, loadable segments should contain
5137 something. They are allowed by the ELF spec however, so only
5138 a warning is produced. */
5139 if (segment
->p_type
== PT_LOAD
)
5140 (*_bfd_error_handler
)
5141 (_("%B: warning: Empty loadable segment detected, is this intentional ?\n"),
5145 *pointer_to_map
= map
;
5146 pointer_to_map
= &map
->next
;
5151 /* Now scan the sections in the input BFD again and attempt
5152 to add their corresponding output sections to the segment map.
5153 The problem here is how to handle an output section which has
5154 been moved (ie had its LMA changed). There are four possibilities:
5156 1. None of the sections have been moved.
5157 In this case we can continue to use the segment LMA from the
5160 2. All of the sections have been moved by the same amount.
5161 In this case we can change the segment's LMA to match the LMA
5162 of the first section.
5164 3. Some of the sections have been moved, others have not.
5165 In this case those sections which have not been moved can be
5166 placed in the current segment which will have to have its size,
5167 and possibly its LMA changed, and a new segment or segments will
5168 have to be created to contain the other sections.
5170 4. The sections have been moved, but not by the same amount.
5171 In this case we can change the segment's LMA to match the LMA
5172 of the first section and we will have to create a new segment
5173 or segments to contain the other sections.
5175 In order to save time, we allocate an array to hold the section
5176 pointers that we are interested in. As these sections get assigned
5177 to a segment, they are removed from this array. */
5179 /* Gcc 2.96 miscompiles this code on mips. Don't do casting here
5180 to work around this long long bug. */
5181 amt
= section_count
* sizeof (asection
*);
5182 sections
= bfd_malloc (amt
);
5183 if (sections
== NULL
)
5186 /* Step One: Scan for segment vs section LMA conflicts.
5187 Also add the sections to the section array allocated above.
5188 Also add the sections to the current segment. In the common
5189 case, where the sections have not been moved, this means that
5190 we have completely filled the segment, and there is nothing
5196 for (j
= 0, section
= ibfd
->sections
;
5198 section
= section
->next
)
5200 if (INCLUDE_SECTION_IN_SEGMENT (section
, segment
, bed
))
5202 output_section
= section
->output_section
;
5204 sections
[j
++] = section
;
5206 /* The Solaris native linker always sets p_paddr to 0.
5207 We try to catch that case here, and set it to the
5208 correct value. Note - some backends require that
5209 p_paddr be left as zero. */
5210 if (segment
->p_paddr
== 0
5211 && segment
->p_vaddr
!= 0
5212 && (! bed
->want_p_paddr_set_to_zero
)
5214 && output_section
->lma
!= 0
5215 && (output_section
->vma
== (segment
->p_vaddr
5216 + (map
->includes_filehdr
5219 + (map
->includes_phdrs
5221 * iehdr
->e_phentsize
)
5223 map
->p_paddr
= segment
->p_vaddr
;
5225 /* Match up the physical address of the segment with the
5226 LMA address of the output section. */
5227 if (IS_CONTAINED_BY_LMA (output_section
, segment
, map
->p_paddr
)
5228 || IS_COREFILE_NOTE (segment
, section
)
5229 || (bed
->want_p_paddr_set_to_zero
&&
5230 IS_CONTAINED_BY_VMA (output_section
, segment
))
5233 if (matching_lma
== 0)
5234 matching_lma
= output_section
->lma
;
5236 /* We assume that if the section fits within the segment
5237 then it does not overlap any other section within that
5239 map
->sections
[isec
++] = output_section
;
5241 else if (suggested_lma
== 0)
5242 suggested_lma
= output_section
->lma
;
5246 BFD_ASSERT (j
== section_count
);
5248 /* Step Two: Adjust the physical address of the current segment,
5250 if (isec
== section_count
)
5252 /* All of the sections fitted within the segment as currently
5253 specified. This is the default case. Add the segment to
5254 the list of built segments and carry on to process the next
5255 program header in the input BFD. */
5256 map
->count
= section_count
;
5257 *pointer_to_map
= map
;
5258 pointer_to_map
= &map
->next
;
5265 if (matching_lma
!= 0)
5267 /* At least one section fits inside the current segment.
5268 Keep it, but modify its physical address to match the
5269 LMA of the first section that fitted. */
5270 map
->p_paddr
= matching_lma
;
5274 /* None of the sections fitted inside the current segment.
5275 Change the current segment's physical address to match
5276 the LMA of the first section. */
5277 map
->p_paddr
= suggested_lma
;
5280 /* Offset the segment physical address from the lma
5281 to allow for space taken up by elf headers. */
5282 if (map
->includes_filehdr
)
5283 map
->p_paddr
-= iehdr
->e_ehsize
;
5285 if (map
->includes_phdrs
)
5287 map
->p_paddr
-= iehdr
->e_phnum
* iehdr
->e_phentsize
;
5289 /* iehdr->e_phnum is just an estimate of the number
5290 of program headers that we will need. Make a note
5291 here of the number we used and the segment we chose
5292 to hold these headers, so that we can adjust the
5293 offset when we know the correct value. */
5294 phdr_adjust_num
= iehdr
->e_phnum
;
5295 phdr_adjust_seg
= map
;
5299 /* Step Three: Loop over the sections again, this time assigning
5300 those that fit to the current segment and removing them from the
5301 sections array; but making sure not to leave large gaps. Once all
5302 possible sections have been assigned to the current segment it is
5303 added to the list of built segments and if sections still remain
5304 to be assigned, a new segment is constructed before repeating
5312 /* Fill the current segment with sections that fit. */
5313 for (j
= 0; j
< section_count
; j
++)
5315 section
= sections
[j
];
5317 if (section
== NULL
)
5320 output_section
= section
->output_section
;
5322 BFD_ASSERT (output_section
!= NULL
);
5324 if (IS_CONTAINED_BY_LMA (output_section
, segment
, map
->p_paddr
)
5325 || IS_COREFILE_NOTE (segment
, section
))
5327 if (map
->count
== 0)
5329 /* If the first section in a segment does not start at
5330 the beginning of the segment, then something is
5332 if (output_section
->lma
!=
5334 + (map
->includes_filehdr
? iehdr
->e_ehsize
: 0)
5335 + (map
->includes_phdrs
5336 ? iehdr
->e_phnum
* iehdr
->e_phentsize
5342 asection
* prev_sec
;
5344 prev_sec
= map
->sections
[map
->count
- 1];
5346 /* If the gap between the end of the previous section
5347 and the start of this section is more than
5348 maxpagesize then we need to start a new segment. */
5349 if ((BFD_ALIGN (prev_sec
->lma
+ prev_sec
->size
,
5351 < BFD_ALIGN (output_section
->lma
, maxpagesize
))
5352 || ((prev_sec
->lma
+ prev_sec
->size
)
5353 > output_section
->lma
))
5355 if (suggested_lma
== 0)
5356 suggested_lma
= output_section
->lma
;
5362 map
->sections
[map
->count
++] = output_section
;
5365 section
->segment_mark
= TRUE
;
5367 else if (suggested_lma
== 0)
5368 suggested_lma
= output_section
->lma
;
5371 BFD_ASSERT (map
->count
> 0);
5373 /* Add the current segment to the list of built segments. */
5374 *pointer_to_map
= map
;
5375 pointer_to_map
= &map
->next
;
5377 if (isec
< section_count
)
5379 /* We still have not allocated all of the sections to
5380 segments. Create a new segment here, initialise it
5381 and carry on looping. */
5382 amt
= sizeof (struct elf_segment_map
);
5383 amt
+= ((bfd_size_type
) section_count
- 1) * sizeof (asection
*);
5384 map
= bfd_alloc (obfd
, amt
);
5391 /* Initialise the fields of the segment map. Set the physical
5392 physical address to the LMA of the first section that has
5393 not yet been assigned. */
5395 map
->p_type
= segment
->p_type
;
5396 map
->p_flags
= segment
->p_flags
;
5397 map
->p_flags_valid
= 1;
5398 map
->p_paddr
= suggested_lma
;
5399 map
->p_paddr_valid
= 1;
5400 map
->includes_filehdr
= 0;
5401 map
->includes_phdrs
= 0;
5404 while (isec
< section_count
);
5409 /* The Solaris linker creates program headers in which all the
5410 p_paddr fields are zero. When we try to objcopy or strip such a
5411 file, we get confused. Check for this case, and if we find it
5412 reset the p_paddr_valid fields. */
5413 for (map
= map_first
; map
!= NULL
; map
= map
->next
)
5414 if (map
->p_paddr
!= 0)
5417 for (map
= map_first
; map
!= NULL
; map
= map
->next
)
5418 map
->p_paddr_valid
= 0;
5420 elf_tdata (obfd
)->segment_map
= map_first
;
5422 /* If we had to estimate the number of program headers that were
5423 going to be needed, then check our estimate now and adjust
5424 the offset if necessary. */
5425 if (phdr_adjust_seg
!= NULL
)
5429 for (count
= 0, map
= map_first
; map
!= NULL
; map
= map
->next
)
5432 if (count
> phdr_adjust_num
)
5433 phdr_adjust_seg
->p_paddr
5434 -= (count
- phdr_adjust_num
) * iehdr
->e_phentsize
;
5438 /* Final Step: Sort the segments into ascending order of physical
5440 if (map_first
!= NULL
)
5442 struct elf_segment_map
*prev
;
5445 for (map
= map_first
->next
; map
!= NULL
; prev
= map
, map
= map
->next
)
5447 /* Yes I know - its a bubble sort.... */
5448 if (map
->next
!= NULL
&& (map
->next
->p_paddr
< map
->p_paddr
))
5450 /* Swap map and map->next. */
5451 prev
->next
= map
->next
;
5452 map
->next
= map
->next
->next
;
5453 prev
->next
->next
= map
;
5464 #undef IS_CONTAINED_BY_VMA
5465 #undef IS_CONTAINED_BY_LMA
5466 #undef IS_COREFILE_NOTE
5467 #undef IS_SOLARIS_PT_INTERP
5468 #undef INCLUDE_SECTION_IN_SEGMENT
5469 #undef SEGMENT_AFTER_SEGMENT
5470 #undef SEGMENT_OVERLAPS
5474 /* Copy private section information. This copies over the entsize
5475 field, and sometimes the info field. */
5478 _bfd_elf_copy_private_section_data (bfd
*ibfd
,
5483 Elf_Internal_Shdr
*ihdr
, *ohdr
;
5485 if (ibfd
->xvec
->flavour
!= bfd_target_elf_flavour
5486 || obfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
5489 ihdr
= &elf_section_data (isec
)->this_hdr
;
5490 ohdr
= &elf_section_data (osec
)->this_hdr
;
5492 ohdr
->sh_entsize
= ihdr
->sh_entsize
;
5494 if (ihdr
->sh_type
== SHT_SYMTAB
5495 || ihdr
->sh_type
== SHT_DYNSYM
5496 || ihdr
->sh_type
== SHT_GNU_verneed
5497 || ihdr
->sh_type
== SHT_GNU_verdef
)
5498 ohdr
->sh_info
= ihdr
->sh_info
;
5500 /* Set things up for objcopy. The output SHT_GROUP section will
5501 have its elf_next_in_group pointing back to the input group
5503 elf_next_in_group (osec
) = elf_next_in_group (isec
);
5504 elf_group_name (osec
) = elf_group_name (isec
);
5506 osec
->use_rela_p
= isec
->use_rela_p
;
5511 /* Copy private header information. */
5514 _bfd_elf_copy_private_header_data (bfd
*ibfd
, bfd
*obfd
)
5516 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
5517 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
5520 /* Copy over private BFD data if it has not already been copied.
5521 This must be done here, rather than in the copy_private_bfd_data
5522 entry point, because the latter is called after the section
5523 contents have been set, which means that the program headers have
5524 already been worked out. */
5525 if (elf_tdata (obfd
)->segment_map
== NULL
&& elf_tdata (ibfd
)->phdr
!= NULL
)
5527 if (! copy_private_bfd_data (ibfd
, obfd
))
5534 /* Copy private symbol information. If this symbol is in a section
5535 which we did not map into a BFD section, try to map the section
5536 index correctly. We use special macro definitions for the mapped
5537 section indices; these definitions are interpreted by the
5538 swap_out_syms function. */
5540 #define MAP_ONESYMTAB (SHN_HIOS + 1)
5541 #define MAP_DYNSYMTAB (SHN_HIOS + 2)
5542 #define MAP_STRTAB (SHN_HIOS + 3)
5543 #define MAP_SHSTRTAB (SHN_HIOS + 4)
5544 #define MAP_SYM_SHNDX (SHN_HIOS + 5)
5547 _bfd_elf_copy_private_symbol_data (bfd
*ibfd
,
5552 elf_symbol_type
*isym
, *osym
;
5554 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
5555 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
5558 isym
= elf_symbol_from (ibfd
, isymarg
);
5559 osym
= elf_symbol_from (obfd
, osymarg
);
5563 && bfd_is_abs_section (isym
->symbol
.section
))
5567 shndx
= isym
->internal_elf_sym
.st_shndx
;
5568 if (shndx
== elf_onesymtab (ibfd
))
5569 shndx
= MAP_ONESYMTAB
;
5570 else if (shndx
== elf_dynsymtab (ibfd
))
5571 shndx
= MAP_DYNSYMTAB
;
5572 else if (shndx
== elf_tdata (ibfd
)->strtab_section
)
5574 else if (shndx
== elf_tdata (ibfd
)->shstrtab_section
)
5575 shndx
= MAP_SHSTRTAB
;
5576 else if (shndx
== elf_tdata (ibfd
)->symtab_shndx_section
)
5577 shndx
= MAP_SYM_SHNDX
;
5578 osym
->internal_elf_sym
.st_shndx
= shndx
;
5584 /* Swap out the symbols. */
5587 swap_out_syms (bfd
*abfd
,
5588 struct bfd_strtab_hash
**sttp
,
5591 const struct elf_backend_data
*bed
;
5594 struct bfd_strtab_hash
*stt
;
5595 Elf_Internal_Shdr
*symtab_hdr
;
5596 Elf_Internal_Shdr
*symtab_shndx_hdr
;
5597 Elf_Internal_Shdr
*symstrtab_hdr
;
5598 char *outbound_syms
;
5599 char *outbound_shndx
;
5602 bfd_boolean name_local_sections
;
5604 if (!elf_map_symbols (abfd
))
5607 /* Dump out the symtabs. */
5608 stt
= _bfd_elf_stringtab_init ();
5612 bed
= get_elf_backend_data (abfd
);
5613 symcount
= bfd_get_symcount (abfd
);
5614 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
5615 symtab_hdr
->sh_type
= SHT_SYMTAB
;
5616 symtab_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
5617 symtab_hdr
->sh_size
= symtab_hdr
->sh_entsize
* (symcount
+ 1);
5618 symtab_hdr
->sh_info
= elf_num_locals (abfd
) + 1;
5619 symtab_hdr
->sh_addralign
= 1 << bed
->s
->log_file_align
;
5621 symstrtab_hdr
= &elf_tdata (abfd
)->strtab_hdr
;
5622 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
5624 amt
= (bfd_size_type
) (1 + symcount
) * bed
->s
->sizeof_sym
;
5625 outbound_syms
= bfd_alloc (abfd
, amt
);
5626 if (outbound_syms
== NULL
)
5628 _bfd_stringtab_free (stt
);
5631 symtab_hdr
->contents
= outbound_syms
;
5633 outbound_shndx
= NULL
;
5634 symtab_shndx_hdr
= &elf_tdata (abfd
)->symtab_shndx_hdr
;
5635 if (symtab_shndx_hdr
->sh_name
!= 0)
5637 amt
= (bfd_size_type
) (1 + symcount
) * sizeof (Elf_External_Sym_Shndx
);
5638 outbound_shndx
= bfd_zalloc (abfd
, amt
);
5639 if (outbound_shndx
== NULL
)
5641 _bfd_stringtab_free (stt
);
5645 symtab_shndx_hdr
->contents
= outbound_shndx
;
5646 symtab_shndx_hdr
->sh_type
= SHT_SYMTAB_SHNDX
;
5647 symtab_shndx_hdr
->sh_size
= amt
;
5648 symtab_shndx_hdr
->sh_addralign
= sizeof (Elf_External_Sym_Shndx
);
5649 symtab_shndx_hdr
->sh_entsize
= sizeof (Elf_External_Sym_Shndx
);
5652 /* Now generate the data (for "contents"). */
5654 /* Fill in zeroth symbol and swap it out. */
5655 Elf_Internal_Sym sym
;
5661 sym
.st_shndx
= SHN_UNDEF
;
5662 bed
->s
->swap_symbol_out (abfd
, &sym
, outbound_syms
, outbound_shndx
);
5663 outbound_syms
+= bed
->s
->sizeof_sym
;
5664 if (outbound_shndx
!= NULL
)
5665 outbound_shndx
+= sizeof (Elf_External_Sym_Shndx
);
5669 = (bed
->elf_backend_name_local_section_symbols
5670 && bed
->elf_backend_name_local_section_symbols (abfd
));
5672 syms
= bfd_get_outsymbols (abfd
);
5673 for (idx
= 0; idx
< symcount
; idx
++)
5675 Elf_Internal_Sym sym
;
5676 bfd_vma value
= syms
[idx
]->value
;
5677 elf_symbol_type
*type_ptr
;
5678 flagword flags
= syms
[idx
]->flags
;
5681 if (!name_local_sections
5682 && (flags
& (BSF_SECTION_SYM
| BSF_GLOBAL
)) == BSF_SECTION_SYM
)
5684 /* Local section symbols have no name. */
5689 sym
.st_name
= (unsigned long) _bfd_stringtab_add (stt
,
5692 if (sym
.st_name
== (unsigned long) -1)
5694 _bfd_stringtab_free (stt
);
5699 type_ptr
= elf_symbol_from (abfd
, syms
[idx
]);
5701 if ((flags
& BSF_SECTION_SYM
) == 0
5702 && bfd_is_com_section (syms
[idx
]->section
))
5704 /* ELF common symbols put the alignment into the `value' field,
5705 and the size into the `size' field. This is backwards from
5706 how BFD handles it, so reverse it here. */
5707 sym
.st_size
= value
;
5708 if (type_ptr
== NULL
5709 || type_ptr
->internal_elf_sym
.st_value
== 0)
5710 sym
.st_value
= value
>= 16 ? 16 : (1 << bfd_log2 (value
));
5712 sym
.st_value
= type_ptr
->internal_elf_sym
.st_value
;
5713 sym
.st_shndx
= _bfd_elf_section_from_bfd_section
5714 (abfd
, syms
[idx
]->section
);
5718 asection
*sec
= syms
[idx
]->section
;
5721 if (sec
->output_section
)
5723 value
+= sec
->output_offset
;
5724 sec
= sec
->output_section
;
5727 /* Don't add in the section vma for relocatable output. */
5728 if (! relocatable_p
)
5730 sym
.st_value
= value
;
5731 sym
.st_size
= type_ptr
? type_ptr
->internal_elf_sym
.st_size
: 0;
5733 if (bfd_is_abs_section (sec
)
5735 && type_ptr
->internal_elf_sym
.st_shndx
!= 0)
5737 /* This symbol is in a real ELF section which we did
5738 not create as a BFD section. Undo the mapping done
5739 by copy_private_symbol_data. */
5740 shndx
= type_ptr
->internal_elf_sym
.st_shndx
;
5744 shndx
= elf_onesymtab (abfd
);
5747 shndx
= elf_dynsymtab (abfd
);
5750 shndx
= elf_tdata (abfd
)->strtab_section
;
5753 shndx
= elf_tdata (abfd
)->shstrtab_section
;
5756 shndx
= elf_tdata (abfd
)->symtab_shndx_section
;
5764 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec
);
5770 /* Writing this would be a hell of a lot easier if
5771 we had some decent documentation on bfd, and
5772 knew what to expect of the library, and what to
5773 demand of applications. For example, it
5774 appears that `objcopy' might not set the
5775 section of a symbol to be a section that is
5776 actually in the output file. */
5777 sec2
= bfd_get_section_by_name (abfd
, sec
->name
);
5780 _bfd_error_handler (_("\
5781 Unable to find equivalent output section for symbol '%s' from section '%s'"),
5782 syms
[idx
]->name
? syms
[idx
]->name
: "<Local sym>",
5784 bfd_set_error (bfd_error_invalid_operation
);
5785 _bfd_stringtab_free (stt
);
5789 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec2
);
5790 BFD_ASSERT (shndx
!= -1);
5794 sym
.st_shndx
= shndx
;
5797 if ((flags
& BSF_THREAD_LOCAL
) != 0)
5799 else if ((flags
& BSF_FUNCTION
) != 0)
5801 else if ((flags
& BSF_OBJECT
) != 0)
5806 if (syms
[idx
]->section
->flags
& SEC_THREAD_LOCAL
)
5809 /* Processor-specific types. */
5810 if (type_ptr
!= NULL
5811 && bed
->elf_backend_get_symbol_type
)
5812 type
= ((*bed
->elf_backend_get_symbol_type
)
5813 (&type_ptr
->internal_elf_sym
, type
));
5815 if (flags
& BSF_SECTION_SYM
)
5817 if (flags
& BSF_GLOBAL
)
5818 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, STT_SECTION
);
5820 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_SECTION
);
5822 else if (bfd_is_com_section (syms
[idx
]->section
))
5823 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, type
);
5824 else if (bfd_is_und_section (syms
[idx
]->section
))
5825 sym
.st_info
= ELF_ST_INFO (((flags
& BSF_WEAK
)
5829 else if (flags
& BSF_FILE
)
5830 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FILE
);
5833 int bind
= STB_LOCAL
;
5835 if (flags
& BSF_LOCAL
)
5837 else if (flags
& BSF_WEAK
)
5839 else if (flags
& BSF_GLOBAL
)
5842 sym
.st_info
= ELF_ST_INFO (bind
, type
);
5845 if (type_ptr
!= NULL
)
5846 sym
.st_other
= type_ptr
->internal_elf_sym
.st_other
;
5850 bed
->s
->swap_symbol_out (abfd
, &sym
, outbound_syms
, outbound_shndx
);
5851 outbound_syms
+= bed
->s
->sizeof_sym
;
5852 if (outbound_shndx
!= NULL
)
5853 outbound_shndx
+= sizeof (Elf_External_Sym_Shndx
);
5857 symstrtab_hdr
->sh_size
= _bfd_stringtab_size (stt
);
5858 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
5860 symstrtab_hdr
->sh_flags
= 0;
5861 symstrtab_hdr
->sh_addr
= 0;
5862 symstrtab_hdr
->sh_entsize
= 0;
5863 symstrtab_hdr
->sh_link
= 0;
5864 symstrtab_hdr
->sh_info
= 0;
5865 symstrtab_hdr
->sh_addralign
= 1;
5870 /* Return the number of bytes required to hold the symtab vector.
5872 Note that we base it on the count plus 1, since we will null terminate
5873 the vector allocated based on this size. However, the ELF symbol table
5874 always has a dummy entry as symbol #0, so it ends up even. */
5877 _bfd_elf_get_symtab_upper_bound (bfd
*abfd
)
5881 Elf_Internal_Shdr
*hdr
= &elf_tdata (abfd
)->symtab_hdr
;
5883 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
5884 symtab_size
= (symcount
+ 1) * (sizeof (asymbol
*));
5886 symtab_size
-= sizeof (asymbol
*);
5892 _bfd_elf_get_dynamic_symtab_upper_bound (bfd
*abfd
)
5896 Elf_Internal_Shdr
*hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
5898 if (elf_dynsymtab (abfd
) == 0)
5900 bfd_set_error (bfd_error_invalid_operation
);
5904 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
5905 symtab_size
= (symcount
+ 1) * (sizeof (asymbol
*));
5907 symtab_size
-= sizeof (asymbol
*);
5913 _bfd_elf_get_reloc_upper_bound (bfd
*abfd ATTRIBUTE_UNUSED
,
5916 return (asect
->reloc_count
+ 1) * sizeof (arelent
*);
5919 /* Canonicalize the relocs. */
5922 _bfd_elf_canonicalize_reloc (bfd
*abfd
,
5929 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
5931 if (! bed
->s
->slurp_reloc_table (abfd
, section
, symbols
, FALSE
))
5934 tblptr
= section
->relocation
;
5935 for (i
= 0; i
< section
->reloc_count
; i
++)
5936 *relptr
++ = tblptr
++;
5940 return section
->reloc_count
;
5944 _bfd_elf_canonicalize_symtab (bfd
*abfd
, asymbol
**allocation
)
5946 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
5947 long symcount
= bed
->s
->slurp_symbol_table (abfd
, allocation
, FALSE
);
5950 bfd_get_symcount (abfd
) = symcount
;
5955 _bfd_elf_canonicalize_dynamic_symtab (bfd
*abfd
,
5956 asymbol
**allocation
)
5958 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
5959 long symcount
= bed
->s
->slurp_symbol_table (abfd
, allocation
, TRUE
);
5962 bfd_get_dynamic_symcount (abfd
) = symcount
;
5966 /* Return the size required for the dynamic reloc entries. Any
5967 section that was actually installed in the BFD, and has type
5968 SHT_REL or SHT_RELA, and uses the dynamic symbol table, is
5969 considered to be a dynamic reloc section. */
5972 _bfd_elf_get_dynamic_reloc_upper_bound (bfd
*abfd
)
5977 if (elf_dynsymtab (abfd
) == 0)
5979 bfd_set_error (bfd_error_invalid_operation
);
5983 ret
= sizeof (arelent
*);
5984 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
5985 if (elf_section_data (s
)->this_hdr
.sh_link
== elf_dynsymtab (abfd
)
5986 && (elf_section_data (s
)->this_hdr
.sh_type
== SHT_REL
5987 || elf_section_data (s
)->this_hdr
.sh_type
== SHT_RELA
))
5988 ret
+= ((s
->size
/ elf_section_data (s
)->this_hdr
.sh_entsize
)
5989 * sizeof (arelent
*));
5994 /* Canonicalize the dynamic relocation entries. Note that we return
5995 the dynamic relocations as a single block, although they are
5996 actually associated with particular sections; the interface, which
5997 was designed for SunOS style shared libraries, expects that there
5998 is only one set of dynamic relocs. Any section that was actually
5999 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses
6000 the dynamic symbol table, is considered to be a dynamic reloc
6004 _bfd_elf_canonicalize_dynamic_reloc (bfd
*abfd
,
6008 bfd_boolean (*slurp_relocs
) (bfd
*, asection
*, asymbol
**, bfd_boolean
);
6012 if (elf_dynsymtab (abfd
) == 0)
6014 bfd_set_error (bfd_error_invalid_operation
);
6018 slurp_relocs
= get_elf_backend_data (abfd
)->s
->slurp_reloc_table
;
6020 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
6022 if (elf_section_data (s
)->this_hdr
.sh_link
== elf_dynsymtab (abfd
)
6023 && (elf_section_data (s
)->this_hdr
.sh_type
== SHT_REL
6024 || elf_section_data (s
)->this_hdr
.sh_type
== SHT_RELA
))
6029 if (! (*slurp_relocs
) (abfd
, s
, syms
, TRUE
))
6031 count
= s
->size
/ elf_section_data (s
)->this_hdr
.sh_entsize
;
6033 for (i
= 0; i
< count
; i
++)
6044 /* Read in the version information. */
6047 _bfd_elf_slurp_version_tables (bfd
*abfd
, bfd_boolean default_imported_symver
)
6049 bfd_byte
*contents
= NULL
;
6051 unsigned int freeidx
= 0;
6053 if (elf_dynverref (abfd
) != 0)
6055 Elf_Internal_Shdr
*hdr
;
6056 Elf_External_Verneed
*everneed
;
6057 Elf_Internal_Verneed
*iverneed
;
6060 hdr
= &elf_tdata (abfd
)->dynverref_hdr
;
6062 amt
= (bfd_size_type
) hdr
->sh_info
* sizeof (Elf_Internal_Verneed
);
6063 elf_tdata (abfd
)->verref
= bfd_zalloc (abfd
, amt
);
6064 if (elf_tdata (abfd
)->verref
== NULL
)
6067 elf_tdata (abfd
)->cverrefs
= hdr
->sh_info
;
6069 contents
= bfd_malloc (hdr
->sh_size
);
6070 if (contents
== NULL
)
6072 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
6073 || bfd_bread (contents
, hdr
->sh_size
, abfd
) != hdr
->sh_size
)
6076 everneed
= (Elf_External_Verneed
*) contents
;
6077 iverneed
= elf_tdata (abfd
)->verref
;
6078 for (i
= 0; i
< hdr
->sh_info
; i
++, iverneed
++)
6080 Elf_External_Vernaux
*evernaux
;
6081 Elf_Internal_Vernaux
*ivernaux
;
6084 _bfd_elf_swap_verneed_in (abfd
, everneed
, iverneed
);
6086 iverneed
->vn_bfd
= abfd
;
6088 iverneed
->vn_filename
=
6089 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
6091 if (iverneed
->vn_filename
== NULL
)
6094 amt
= iverneed
->vn_cnt
;
6095 amt
*= sizeof (Elf_Internal_Vernaux
);
6096 iverneed
->vn_auxptr
= bfd_alloc (abfd
, amt
);
6098 evernaux
= ((Elf_External_Vernaux
*)
6099 ((bfd_byte
*) everneed
+ iverneed
->vn_aux
));
6100 ivernaux
= iverneed
->vn_auxptr
;
6101 for (j
= 0; j
< iverneed
->vn_cnt
; j
++, ivernaux
++)
6103 _bfd_elf_swap_vernaux_in (abfd
, evernaux
, ivernaux
);
6105 ivernaux
->vna_nodename
=
6106 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
6107 ivernaux
->vna_name
);
6108 if (ivernaux
->vna_nodename
== NULL
)
6111 if (j
+ 1 < iverneed
->vn_cnt
)
6112 ivernaux
->vna_nextptr
= ivernaux
+ 1;
6114 ivernaux
->vna_nextptr
= NULL
;
6116 evernaux
= ((Elf_External_Vernaux
*)
6117 ((bfd_byte
*) evernaux
+ ivernaux
->vna_next
));
6119 if (ivernaux
->vna_other
> freeidx
)
6120 freeidx
= ivernaux
->vna_other
;
6123 if (i
+ 1 < hdr
->sh_info
)
6124 iverneed
->vn_nextref
= iverneed
+ 1;
6126 iverneed
->vn_nextref
= NULL
;
6128 everneed
= ((Elf_External_Verneed
*)
6129 ((bfd_byte
*) everneed
+ iverneed
->vn_next
));
6136 if (elf_dynverdef (abfd
) != 0)
6138 Elf_Internal_Shdr
*hdr
;
6139 Elf_External_Verdef
*everdef
;
6140 Elf_Internal_Verdef
*iverdef
;
6141 Elf_Internal_Verdef
*iverdefarr
;
6142 Elf_Internal_Verdef iverdefmem
;
6144 unsigned int maxidx
;
6146 hdr
= &elf_tdata (abfd
)->dynverdef_hdr
;
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 /* We know the number of entries in the section but not the maximum
6156 index. Therefore we have to run through all entries and find
6158 everdef
= (Elf_External_Verdef
*) contents
;
6160 for (i
= 0; i
< hdr
->sh_info
; ++i
)
6162 _bfd_elf_swap_verdef_in (abfd
, everdef
, &iverdefmem
);
6164 if ((iverdefmem
.vd_ndx
& ((unsigned) VERSYM_VERSION
)) > maxidx
)
6165 maxidx
= iverdefmem
.vd_ndx
& ((unsigned) VERSYM_VERSION
);
6167 everdef
= ((Elf_External_Verdef
*)
6168 ((bfd_byte
*) everdef
+ iverdefmem
.vd_next
));
6171 if (default_imported_symver
)
6173 if (freeidx
> maxidx
)
6178 amt
= (bfd_size_type
) maxidx
* sizeof (Elf_Internal_Verdef
);
6179 elf_tdata (abfd
)->verdef
= bfd_zalloc (abfd
, amt
);
6180 if (elf_tdata (abfd
)->verdef
== NULL
)
6183 elf_tdata (abfd
)->cverdefs
= maxidx
;
6185 everdef
= (Elf_External_Verdef
*) contents
;
6186 iverdefarr
= elf_tdata (abfd
)->verdef
;
6187 for (i
= 0; i
< hdr
->sh_info
; i
++)
6189 Elf_External_Verdaux
*everdaux
;
6190 Elf_Internal_Verdaux
*iverdaux
;
6193 _bfd_elf_swap_verdef_in (abfd
, everdef
, &iverdefmem
);
6195 iverdef
= &iverdefarr
[(iverdefmem
.vd_ndx
& VERSYM_VERSION
) - 1];
6196 memcpy (iverdef
, &iverdefmem
, sizeof (Elf_Internal_Verdef
));
6198 iverdef
->vd_bfd
= abfd
;
6200 amt
= (bfd_size_type
) iverdef
->vd_cnt
* sizeof (Elf_Internal_Verdaux
);
6201 iverdef
->vd_auxptr
= bfd_alloc (abfd
, amt
);
6202 if (iverdef
->vd_auxptr
== NULL
)
6205 everdaux
= ((Elf_External_Verdaux
*)
6206 ((bfd_byte
*) everdef
+ iverdef
->vd_aux
));
6207 iverdaux
= iverdef
->vd_auxptr
;
6208 for (j
= 0; j
< iverdef
->vd_cnt
; j
++, iverdaux
++)
6210 _bfd_elf_swap_verdaux_in (abfd
, everdaux
, iverdaux
);
6212 iverdaux
->vda_nodename
=
6213 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
6214 iverdaux
->vda_name
);
6215 if (iverdaux
->vda_nodename
== NULL
)
6218 if (j
+ 1 < iverdef
->vd_cnt
)
6219 iverdaux
->vda_nextptr
= iverdaux
+ 1;
6221 iverdaux
->vda_nextptr
= NULL
;
6223 everdaux
= ((Elf_External_Verdaux
*)
6224 ((bfd_byte
*) everdaux
+ iverdaux
->vda_next
));
6227 iverdef
->vd_nodename
= iverdef
->vd_auxptr
->vda_nodename
;
6229 if (i
+ 1 < hdr
->sh_info
)
6230 iverdef
->vd_nextdef
= iverdef
+ 1;
6232 iverdef
->vd_nextdef
= NULL
;
6234 everdef
= ((Elf_External_Verdef
*)
6235 ((bfd_byte
*) everdef
+ iverdef
->vd_next
));
6241 else if (default_imported_symver
)
6248 amt
= (bfd_size_type
) freeidx
* sizeof (Elf_Internal_Verdef
);
6249 elf_tdata (abfd
)->verdef
= bfd_zalloc (abfd
, amt
);
6250 if (elf_tdata (abfd
)->verdef
== NULL
)
6253 elf_tdata (abfd
)->cverdefs
= freeidx
;
6256 /* Create a default version based on the soname. */
6257 if (default_imported_symver
)
6259 Elf_Internal_Verdef
*iverdef
;
6260 Elf_Internal_Verdaux
*iverdaux
;
6262 iverdef
= &elf_tdata (abfd
)->verdef
[freeidx
- 1];;
6264 iverdef
->vd_version
= VER_DEF_CURRENT
;
6265 iverdef
->vd_flags
= 0;
6266 iverdef
->vd_ndx
= freeidx
;
6267 iverdef
->vd_cnt
= 1;
6269 iverdef
->vd_bfd
= abfd
;
6271 iverdef
->vd_nodename
= bfd_elf_get_dt_soname (abfd
);
6272 if (iverdef
->vd_nodename
== NULL
)
6274 iverdef
->vd_nextdef
= NULL
;
6275 amt
= (bfd_size_type
) sizeof (Elf_Internal_Verdaux
);
6276 iverdef
->vd_auxptr
= bfd_alloc (abfd
, amt
);
6278 iverdaux
= iverdef
->vd_auxptr
;
6279 iverdaux
->vda_nodename
= iverdef
->vd_nodename
;
6280 iverdaux
->vda_nextptr
= NULL
;
6286 if (contents
!= NULL
)
6292 _bfd_elf_make_empty_symbol (bfd
*abfd
)
6294 elf_symbol_type
*newsym
;
6295 bfd_size_type amt
= sizeof (elf_symbol_type
);
6297 newsym
= bfd_zalloc (abfd
, amt
);
6302 newsym
->symbol
.the_bfd
= abfd
;
6303 return &newsym
->symbol
;
6308 _bfd_elf_get_symbol_info (bfd
*abfd ATTRIBUTE_UNUSED
,
6312 bfd_symbol_info (symbol
, ret
);
6315 /* Return whether a symbol name implies a local symbol. Most targets
6316 use this function for the is_local_label_name entry point, but some
6320 _bfd_elf_is_local_label_name (bfd
*abfd ATTRIBUTE_UNUSED
,
6323 /* Normal local symbols start with ``.L''. */
6324 if (name
[0] == '.' && name
[1] == 'L')
6327 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
6328 DWARF debugging symbols starting with ``..''. */
6329 if (name
[0] == '.' && name
[1] == '.')
6332 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
6333 emitting DWARF debugging output. I suspect this is actually a
6334 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
6335 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
6336 underscore to be emitted on some ELF targets). For ease of use,
6337 we treat such symbols as local. */
6338 if (name
[0] == '_' && name
[1] == '.' && name
[2] == 'L' && name
[3] == '_')
6345 _bfd_elf_get_lineno (bfd
*abfd ATTRIBUTE_UNUSED
,
6346 asymbol
*symbol ATTRIBUTE_UNUSED
)
6353 _bfd_elf_set_arch_mach (bfd
*abfd
,
6354 enum bfd_architecture arch
,
6355 unsigned long machine
)
6357 /* If this isn't the right architecture for this backend, and this
6358 isn't the generic backend, fail. */
6359 if (arch
!= get_elf_backend_data (abfd
)->arch
6360 && arch
!= bfd_arch_unknown
6361 && get_elf_backend_data (abfd
)->arch
!= bfd_arch_unknown
)
6364 return bfd_default_set_arch_mach (abfd
, arch
, machine
);
6367 /* Find the function to a particular section and offset,
6368 for error reporting. */
6371 elf_find_function (bfd
*abfd ATTRIBUTE_UNUSED
,
6375 const char **filename_ptr
,
6376 const char **functionname_ptr
)
6378 const char *filename
;
6379 asymbol
*func
, *file
;
6382 /* ??? Given multiple file symbols, it is impossible to reliably
6383 choose the right file name for global symbols. File symbols are
6384 local symbols, and thus all file symbols must sort before any
6385 global symbols. The ELF spec may be interpreted to say that a
6386 file symbol must sort before other local symbols, but currently
6387 ld -r doesn't do this. So, for ld -r output, it is possible to
6388 make a better choice of file name for local symbols by ignoring
6389 file symbols appearing after a given local symbol. */
6390 enum { nothing_seen
, symbol_seen
, file_after_symbol_seen
} state
;
6396 state
= nothing_seen
;
6398 for (p
= symbols
; *p
!= NULL
; p
++)
6402 q
= (elf_symbol_type
*) *p
;
6404 switch (ELF_ST_TYPE (q
->internal_elf_sym
.st_info
))
6410 if (state
== symbol_seen
)
6411 state
= file_after_symbol_seen
;
6417 if (bfd_get_section (&q
->symbol
) == section
6418 && q
->symbol
.value
>= low_func
6419 && q
->symbol
.value
<= offset
)
6421 func
= (asymbol
*) q
;
6422 low_func
= q
->symbol
.value
;
6425 else if (ELF_ST_BIND (q
->internal_elf_sym
.st_info
) != STB_LOCAL
6426 && state
== file_after_symbol_seen
)
6429 filename
= bfd_asymbol_name (file
);
6433 if (state
== nothing_seen
)
6434 state
= symbol_seen
;
6441 *filename_ptr
= filename
;
6442 if (functionname_ptr
)
6443 *functionname_ptr
= bfd_asymbol_name (func
);
6448 /* Find the nearest line to a particular section and offset,
6449 for error reporting. */
6452 _bfd_elf_find_nearest_line (bfd
*abfd
,
6456 const char **filename_ptr
,
6457 const char **functionname_ptr
,
6458 unsigned int *line_ptr
)
6462 if (_bfd_dwarf1_find_nearest_line (abfd
, section
, symbols
, offset
,
6463 filename_ptr
, functionname_ptr
,
6466 if (!*functionname_ptr
)
6467 elf_find_function (abfd
, section
, symbols
, offset
,
6468 *filename_ptr
? NULL
: filename_ptr
,
6474 if (_bfd_dwarf2_find_nearest_line (abfd
, section
, symbols
, offset
,
6475 filename_ptr
, functionname_ptr
,
6477 &elf_tdata (abfd
)->dwarf2_find_line_info
))
6479 if (!*functionname_ptr
)
6480 elf_find_function (abfd
, section
, symbols
, offset
,
6481 *filename_ptr
? NULL
: filename_ptr
,
6487 if (! _bfd_stab_section_find_nearest_line (abfd
, symbols
, section
, offset
,
6488 &found
, filename_ptr
,
6489 functionname_ptr
, line_ptr
,
6490 &elf_tdata (abfd
)->line_info
))
6492 if (found
&& (*functionname_ptr
|| *line_ptr
))
6495 if (symbols
== NULL
)
6498 if (! elf_find_function (abfd
, section
, symbols
, offset
,
6499 filename_ptr
, functionname_ptr
))
6507 _bfd_elf_sizeof_headers (bfd
*abfd
, bfd_boolean reloc
)
6511 ret
= get_elf_backend_data (abfd
)->s
->sizeof_ehdr
;
6513 ret
+= get_program_header_size (abfd
);
6518 _bfd_elf_set_section_contents (bfd
*abfd
,
6520 const void *location
,
6522 bfd_size_type count
)
6524 Elf_Internal_Shdr
*hdr
;
6527 if (! abfd
->output_has_begun
6528 && ! _bfd_elf_compute_section_file_positions (abfd
, NULL
))
6531 hdr
= &elf_section_data (section
)->this_hdr
;
6532 pos
= hdr
->sh_offset
+ offset
;
6533 if (bfd_seek (abfd
, pos
, SEEK_SET
) != 0
6534 || bfd_bwrite (location
, count
, abfd
) != count
)
6541 _bfd_elf_no_info_to_howto (bfd
*abfd ATTRIBUTE_UNUSED
,
6542 arelent
*cache_ptr ATTRIBUTE_UNUSED
,
6543 Elf_Internal_Rela
*dst ATTRIBUTE_UNUSED
)
6548 /* Try to convert a non-ELF reloc into an ELF one. */
6551 _bfd_elf_validate_reloc (bfd
*abfd
, arelent
*areloc
)
6553 /* Check whether we really have an ELF howto. */
6555 if ((*areloc
->sym_ptr_ptr
)->the_bfd
->xvec
!= abfd
->xvec
)
6557 bfd_reloc_code_real_type code
;
6558 reloc_howto_type
*howto
;
6560 /* Alien reloc: Try to determine its type to replace it with an
6561 equivalent ELF reloc. */
6563 if (areloc
->howto
->pc_relative
)
6565 switch (areloc
->howto
->bitsize
)
6568 code
= BFD_RELOC_8_PCREL
;
6571 code
= BFD_RELOC_12_PCREL
;
6574 code
= BFD_RELOC_16_PCREL
;
6577 code
= BFD_RELOC_24_PCREL
;
6580 code
= BFD_RELOC_32_PCREL
;
6583 code
= BFD_RELOC_64_PCREL
;
6589 howto
= bfd_reloc_type_lookup (abfd
, code
);
6591 if (areloc
->howto
->pcrel_offset
!= howto
->pcrel_offset
)
6593 if (howto
->pcrel_offset
)
6594 areloc
->addend
+= areloc
->address
;
6596 areloc
->addend
-= areloc
->address
; /* addend is unsigned!! */
6601 switch (areloc
->howto
->bitsize
)
6607 code
= BFD_RELOC_14
;
6610 code
= BFD_RELOC_16
;
6613 code
= BFD_RELOC_26
;
6616 code
= BFD_RELOC_32
;
6619 code
= BFD_RELOC_64
;
6625 howto
= bfd_reloc_type_lookup (abfd
, code
);
6629 areloc
->howto
= howto
;
6637 (*_bfd_error_handler
)
6638 (_("%B: unsupported relocation type %s"),
6639 abfd
, areloc
->howto
->name
);
6640 bfd_set_error (bfd_error_bad_value
);
6645 _bfd_elf_close_and_cleanup (bfd
*abfd
)
6647 if (bfd_get_format (abfd
) == bfd_object
)
6649 if (elf_shstrtab (abfd
) != NULL
)
6650 _bfd_elf_strtab_free (elf_shstrtab (abfd
));
6653 return _bfd_generic_close_and_cleanup (abfd
);
6656 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
6657 in the relocation's offset. Thus we cannot allow any sort of sanity
6658 range-checking to interfere. There is nothing else to do in processing
6661 bfd_reloc_status_type
6662 _bfd_elf_rel_vtable_reloc_fn
6663 (bfd
*abfd ATTRIBUTE_UNUSED
, arelent
*re ATTRIBUTE_UNUSED
,
6664 struct bfd_symbol
*symbol ATTRIBUTE_UNUSED
,
6665 void *data ATTRIBUTE_UNUSED
, asection
*is ATTRIBUTE_UNUSED
,
6666 bfd
*obfd ATTRIBUTE_UNUSED
, char **errmsg ATTRIBUTE_UNUSED
)
6668 return bfd_reloc_ok
;
6671 /* Elf core file support. Much of this only works on native
6672 toolchains, since we rely on knowing the
6673 machine-dependent procfs structure in order to pick
6674 out details about the corefile. */
6676 #ifdef HAVE_SYS_PROCFS_H
6677 # include <sys/procfs.h>
6680 /* FIXME: this is kinda wrong, but it's what gdb wants. */
6683 elfcore_make_pid (bfd
*abfd
)
6685 return ((elf_tdata (abfd
)->core_lwpid
<< 16)
6686 + (elf_tdata (abfd
)->core_pid
));
6689 /* If there isn't a section called NAME, make one, using
6690 data from SECT. Note, this function will generate a
6691 reference to NAME, so you shouldn't deallocate or
6695 elfcore_maybe_make_sect (bfd
*abfd
, char *name
, asection
*sect
)
6699 if (bfd_get_section_by_name (abfd
, name
) != NULL
)
6702 sect2
= bfd_make_section (abfd
, name
);
6706 sect2
->size
= sect
->size
;
6707 sect2
->filepos
= sect
->filepos
;
6708 sect2
->flags
= sect
->flags
;
6709 sect2
->alignment_power
= sect
->alignment_power
;
6713 /* Create a pseudosection containing SIZE bytes at FILEPOS. This
6714 actually creates up to two pseudosections:
6715 - For the single-threaded case, a section named NAME, unless
6716 such a section already exists.
6717 - For the multi-threaded case, a section named "NAME/PID", where
6718 PID is elfcore_make_pid (abfd).
6719 Both pseudosections have identical contents. */
6721 _bfd_elfcore_make_pseudosection (bfd
*abfd
,
6727 char *threaded_name
;
6731 /* Build the section name. */
6733 sprintf (buf
, "%s/%d", name
, elfcore_make_pid (abfd
));
6734 len
= strlen (buf
) + 1;
6735 threaded_name
= bfd_alloc (abfd
, len
);
6736 if (threaded_name
== NULL
)
6738 memcpy (threaded_name
, buf
, len
);
6740 sect
= bfd_make_section_anyway (abfd
, threaded_name
);
6744 sect
->filepos
= filepos
;
6745 sect
->flags
= SEC_HAS_CONTENTS
;
6746 sect
->alignment_power
= 2;
6748 return elfcore_maybe_make_sect (abfd
, name
, sect
);
6751 /* prstatus_t exists on:
6753 linux 2.[01] + glibc
6757 #if defined (HAVE_PRSTATUS_T)
6760 elfcore_grok_prstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
6765 if (note
->descsz
== sizeof (prstatus_t
))
6769 size
= sizeof (prstat
.pr_reg
);
6770 offset
= offsetof (prstatus_t
, pr_reg
);
6771 memcpy (&prstat
, note
->descdata
, sizeof (prstat
));
6773 /* Do not overwrite the core signal if it
6774 has already been set by another thread. */
6775 if (elf_tdata (abfd
)->core_signal
== 0)
6776 elf_tdata (abfd
)->core_signal
= prstat
.pr_cursig
;
6777 elf_tdata (abfd
)->core_pid
= prstat
.pr_pid
;
6779 /* pr_who exists on:
6782 pr_who doesn't exist on:
6785 #if defined (HAVE_PRSTATUS_T_PR_WHO)
6786 elf_tdata (abfd
)->core_lwpid
= prstat
.pr_who
;
6789 #if defined (HAVE_PRSTATUS32_T)
6790 else if (note
->descsz
== sizeof (prstatus32_t
))
6792 /* 64-bit host, 32-bit corefile */
6793 prstatus32_t prstat
;
6795 size
= sizeof (prstat
.pr_reg
);
6796 offset
= offsetof (prstatus32_t
, pr_reg
);
6797 memcpy (&prstat
, note
->descdata
, sizeof (prstat
));
6799 /* Do not overwrite the core signal if it
6800 has already been set by another thread. */
6801 if (elf_tdata (abfd
)->core_signal
== 0)
6802 elf_tdata (abfd
)->core_signal
= prstat
.pr_cursig
;
6803 elf_tdata (abfd
)->core_pid
= prstat
.pr_pid
;
6805 /* pr_who exists on:
6808 pr_who doesn't exist on:
6811 #if defined (HAVE_PRSTATUS32_T_PR_WHO)
6812 elf_tdata (abfd
)->core_lwpid
= prstat
.pr_who
;
6815 #endif /* HAVE_PRSTATUS32_T */
6818 /* Fail - we don't know how to handle any other
6819 note size (ie. data object type). */
6823 /* Make a ".reg/999" section and a ".reg" section. */
6824 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
6825 size
, note
->descpos
+ offset
);
6827 #endif /* defined (HAVE_PRSTATUS_T) */
6829 /* Create a pseudosection containing the exact contents of NOTE. */
6831 elfcore_make_note_pseudosection (bfd
*abfd
,
6833 Elf_Internal_Note
*note
)
6835 return _bfd_elfcore_make_pseudosection (abfd
, name
,
6836 note
->descsz
, note
->descpos
);
6839 /* There isn't a consistent prfpregset_t across platforms,
6840 but it doesn't matter, because we don't have to pick this
6841 data structure apart. */
6844 elfcore_grok_prfpreg (bfd
*abfd
, Elf_Internal_Note
*note
)
6846 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
6849 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
6850 type of 5 (NT_PRXFPREG). Just include the whole note's contents
6854 elfcore_grok_prxfpreg (bfd
*abfd
, Elf_Internal_Note
*note
)
6856 return elfcore_make_note_pseudosection (abfd
, ".reg-xfp", note
);
6859 #if defined (HAVE_PRPSINFO_T)
6860 typedef prpsinfo_t elfcore_psinfo_t
;
6861 #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
6862 typedef prpsinfo32_t elfcore_psinfo32_t
;
6866 #if defined (HAVE_PSINFO_T)
6867 typedef psinfo_t elfcore_psinfo_t
;
6868 #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
6869 typedef psinfo32_t elfcore_psinfo32_t
;
6873 /* return a malloc'ed copy of a string at START which is at
6874 most MAX bytes long, possibly without a terminating '\0'.
6875 the copy will always have a terminating '\0'. */
6878 _bfd_elfcore_strndup (bfd
*abfd
, char *start
, size_t max
)
6881 char *end
= memchr (start
, '\0', max
);
6889 dups
= bfd_alloc (abfd
, len
+ 1);
6893 memcpy (dups
, start
, len
);
6899 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
6901 elfcore_grok_psinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
6903 if (note
->descsz
== sizeof (elfcore_psinfo_t
))
6905 elfcore_psinfo_t psinfo
;
6907 memcpy (&psinfo
, note
->descdata
, sizeof (psinfo
));
6909 elf_tdata (abfd
)->core_program
6910 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_fname
,
6911 sizeof (psinfo
.pr_fname
));
6913 elf_tdata (abfd
)->core_command
6914 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_psargs
,
6915 sizeof (psinfo
.pr_psargs
));
6917 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
6918 else if (note
->descsz
== sizeof (elfcore_psinfo32_t
))
6920 /* 64-bit host, 32-bit corefile */
6921 elfcore_psinfo32_t psinfo
;
6923 memcpy (&psinfo
, note
->descdata
, sizeof (psinfo
));
6925 elf_tdata (abfd
)->core_program
6926 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_fname
,
6927 sizeof (psinfo
.pr_fname
));
6929 elf_tdata (abfd
)->core_command
6930 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_psargs
,
6931 sizeof (psinfo
.pr_psargs
));
6937 /* Fail - we don't know how to handle any other
6938 note size (ie. data object type). */
6942 /* Note that for some reason, a spurious space is tacked
6943 onto the end of the args in some (at least one anyway)
6944 implementations, so strip it off if it exists. */
6947 char *command
= elf_tdata (abfd
)->core_command
;
6948 int n
= strlen (command
);
6950 if (0 < n
&& command
[n
- 1] == ' ')
6951 command
[n
- 1] = '\0';
6956 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
6958 #if defined (HAVE_PSTATUS_T)
6960 elfcore_grok_pstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
6962 if (note
->descsz
== sizeof (pstatus_t
)
6963 #if defined (HAVE_PXSTATUS_T)
6964 || note
->descsz
== sizeof (pxstatus_t
)
6970 memcpy (&pstat
, note
->descdata
, sizeof (pstat
));
6972 elf_tdata (abfd
)->core_pid
= pstat
.pr_pid
;
6974 #if defined (HAVE_PSTATUS32_T)
6975 else if (note
->descsz
== sizeof (pstatus32_t
))
6977 /* 64-bit host, 32-bit corefile */
6980 memcpy (&pstat
, note
->descdata
, sizeof (pstat
));
6982 elf_tdata (abfd
)->core_pid
= pstat
.pr_pid
;
6985 /* Could grab some more details from the "representative"
6986 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
6987 NT_LWPSTATUS note, presumably. */
6991 #endif /* defined (HAVE_PSTATUS_T) */
6993 #if defined (HAVE_LWPSTATUS_T)
6995 elfcore_grok_lwpstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
6997 lwpstatus_t lwpstat
;
7003 if (note
->descsz
!= sizeof (lwpstat
)
7004 #if defined (HAVE_LWPXSTATUS_T)
7005 && note
->descsz
!= sizeof (lwpxstatus_t
)
7010 memcpy (&lwpstat
, note
->descdata
, sizeof (lwpstat
));
7012 elf_tdata (abfd
)->core_lwpid
= lwpstat
.pr_lwpid
;
7013 elf_tdata (abfd
)->core_signal
= lwpstat
.pr_cursig
;
7015 /* Make a ".reg/999" section. */
7017 sprintf (buf
, ".reg/%d", elfcore_make_pid (abfd
));
7018 len
= strlen (buf
) + 1;
7019 name
= bfd_alloc (abfd
, len
);
7022 memcpy (name
, buf
, len
);
7024 sect
= bfd_make_section_anyway (abfd
, name
);
7028 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7029 sect
->size
= sizeof (lwpstat
.pr_context
.uc_mcontext
.gregs
);
7030 sect
->filepos
= note
->descpos
7031 + offsetof (lwpstatus_t
, pr_context
.uc_mcontext
.gregs
);
7034 #if defined (HAVE_LWPSTATUS_T_PR_REG)
7035 sect
->size
= sizeof (lwpstat
.pr_reg
);
7036 sect
->filepos
= note
->descpos
+ offsetof (lwpstatus_t
, pr_reg
);
7039 sect
->flags
= SEC_HAS_CONTENTS
;
7040 sect
->alignment_power
= 2;
7042 if (!elfcore_maybe_make_sect (abfd
, ".reg", sect
))
7045 /* Make a ".reg2/999" section */
7047 sprintf (buf
, ".reg2/%d", elfcore_make_pid (abfd
));
7048 len
= strlen (buf
) + 1;
7049 name
= bfd_alloc (abfd
, len
);
7052 memcpy (name
, buf
, len
);
7054 sect
= bfd_make_section_anyway (abfd
, name
);
7058 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7059 sect
->size
= sizeof (lwpstat
.pr_context
.uc_mcontext
.fpregs
);
7060 sect
->filepos
= note
->descpos
7061 + offsetof (lwpstatus_t
, pr_context
.uc_mcontext
.fpregs
);
7064 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
7065 sect
->size
= sizeof (lwpstat
.pr_fpreg
);
7066 sect
->filepos
= note
->descpos
+ offsetof (lwpstatus_t
, pr_fpreg
);
7069 sect
->flags
= SEC_HAS_CONTENTS
;
7070 sect
->alignment_power
= 2;
7072 return elfcore_maybe_make_sect (abfd
, ".reg2", sect
);
7074 #endif /* defined (HAVE_LWPSTATUS_T) */
7076 #if defined (HAVE_WIN32_PSTATUS_T)
7078 elfcore_grok_win32pstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
7084 win32_pstatus_t pstatus
;
7086 if (note
->descsz
< sizeof (pstatus
))
7089 memcpy (&pstatus
, note
->descdata
, sizeof (pstatus
));
7091 switch (pstatus
.data_type
)
7093 case NOTE_INFO_PROCESS
:
7094 /* FIXME: need to add ->core_command. */
7095 elf_tdata (abfd
)->core_signal
= pstatus
.data
.process_info
.signal
;
7096 elf_tdata (abfd
)->core_pid
= pstatus
.data
.process_info
.pid
;
7099 case NOTE_INFO_THREAD
:
7100 /* Make a ".reg/999" section. */
7101 sprintf (buf
, ".reg/%d", pstatus
.data
.thread_info
.tid
);
7103 len
= strlen (buf
) + 1;
7104 name
= bfd_alloc (abfd
, len
);
7108 memcpy (name
, buf
, len
);
7110 sect
= bfd_make_section_anyway (abfd
, name
);
7114 sect
->size
= sizeof (pstatus
.data
.thread_info
.thread_context
);
7115 sect
->filepos
= (note
->descpos
7116 + offsetof (struct win32_pstatus
,
7117 data
.thread_info
.thread_context
));
7118 sect
->flags
= SEC_HAS_CONTENTS
;
7119 sect
->alignment_power
= 2;
7121 if (pstatus
.data
.thread_info
.is_active_thread
)
7122 if (! elfcore_maybe_make_sect (abfd
, ".reg", sect
))
7126 case NOTE_INFO_MODULE
:
7127 /* Make a ".module/xxxxxxxx" section. */
7128 sprintf (buf
, ".module/%08x", pstatus
.data
.module_info
.base_address
);
7130 len
= strlen (buf
) + 1;
7131 name
= bfd_alloc (abfd
, len
);
7135 memcpy (name
, buf
, len
);
7137 sect
= bfd_make_section_anyway (abfd
, name
);
7142 sect
->size
= note
->descsz
;
7143 sect
->filepos
= note
->descpos
;
7144 sect
->flags
= SEC_HAS_CONTENTS
;
7145 sect
->alignment_power
= 2;
7154 #endif /* HAVE_WIN32_PSTATUS_T */
7157 elfcore_grok_note (bfd
*abfd
, Elf_Internal_Note
*note
)
7159 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
7167 if (bed
->elf_backend_grok_prstatus
)
7168 if ((*bed
->elf_backend_grok_prstatus
) (abfd
, note
))
7170 #if defined (HAVE_PRSTATUS_T)
7171 return elfcore_grok_prstatus (abfd
, note
);
7176 #if defined (HAVE_PSTATUS_T)
7178 return elfcore_grok_pstatus (abfd
, note
);
7181 #if defined (HAVE_LWPSTATUS_T)
7183 return elfcore_grok_lwpstatus (abfd
, note
);
7186 case NT_FPREGSET
: /* FIXME: rename to NT_PRFPREG */
7187 return elfcore_grok_prfpreg (abfd
, note
);
7189 #if defined (HAVE_WIN32_PSTATUS_T)
7190 case NT_WIN32PSTATUS
:
7191 return elfcore_grok_win32pstatus (abfd
, note
);
7194 case NT_PRXFPREG
: /* Linux SSE extension */
7195 if (note
->namesz
== 6
7196 && strcmp (note
->namedata
, "LINUX") == 0)
7197 return elfcore_grok_prxfpreg (abfd
, note
);
7203 if (bed
->elf_backend_grok_psinfo
)
7204 if ((*bed
->elf_backend_grok_psinfo
) (abfd
, note
))
7206 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7207 return elfcore_grok_psinfo (abfd
, note
);
7214 asection
*sect
= bfd_make_section_anyway (abfd
, ".auxv");
7218 sect
->size
= note
->descsz
;
7219 sect
->filepos
= note
->descpos
;
7220 sect
->flags
= SEC_HAS_CONTENTS
;
7221 sect
->alignment_power
= 1 + bfd_get_arch_size (abfd
) / 32;
7229 elfcore_netbsd_get_lwpid (Elf_Internal_Note
*note
, int *lwpidp
)
7233 cp
= strchr (note
->namedata
, '@');
7236 *lwpidp
= atoi(cp
+ 1);
7243 elfcore_grok_netbsd_procinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
7246 /* Signal number at offset 0x08. */
7247 elf_tdata (abfd
)->core_signal
7248 = bfd_h_get_32 (abfd
, (bfd_byte
*) note
->descdata
+ 0x08);
7250 /* Process ID at offset 0x50. */
7251 elf_tdata (abfd
)->core_pid
7252 = bfd_h_get_32 (abfd
, (bfd_byte
*) note
->descdata
+ 0x50);
7254 /* Command name at 0x7c (max 32 bytes, including nul). */
7255 elf_tdata (abfd
)->core_command
7256 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 0x7c, 31);
7258 return elfcore_make_note_pseudosection (abfd
, ".note.netbsdcore.procinfo",
7263 elfcore_grok_netbsd_note (bfd
*abfd
, Elf_Internal_Note
*note
)
7267 if (elfcore_netbsd_get_lwpid (note
, &lwp
))
7268 elf_tdata (abfd
)->core_lwpid
= lwp
;
7270 if (note
->type
== NT_NETBSDCORE_PROCINFO
)
7272 /* NetBSD-specific core "procinfo". Note that we expect to
7273 find this note before any of the others, which is fine,
7274 since the kernel writes this note out first when it
7275 creates a core file. */
7277 return elfcore_grok_netbsd_procinfo (abfd
, note
);
7280 /* As of Jan 2002 there are no other machine-independent notes
7281 defined for NetBSD core files. If the note type is less
7282 than the start of the machine-dependent note types, we don't
7285 if (note
->type
< NT_NETBSDCORE_FIRSTMACH
)
7289 switch (bfd_get_arch (abfd
))
7291 /* On the Alpha, SPARC (32-bit and 64-bit), PT_GETREGS == mach+0 and
7292 PT_GETFPREGS == mach+2. */
7294 case bfd_arch_alpha
:
7295 case bfd_arch_sparc
:
7298 case NT_NETBSDCORE_FIRSTMACH
+0:
7299 return elfcore_make_note_pseudosection (abfd
, ".reg", note
);
7301 case NT_NETBSDCORE_FIRSTMACH
+2:
7302 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
7308 /* On all other arch's, PT_GETREGS == mach+1 and
7309 PT_GETFPREGS == mach+3. */
7314 case NT_NETBSDCORE_FIRSTMACH
+1:
7315 return elfcore_make_note_pseudosection (abfd
, ".reg", note
);
7317 case NT_NETBSDCORE_FIRSTMACH
+3:
7318 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
7328 elfcore_grok_nto_status (bfd
*abfd
, Elf_Internal_Note
*note
, pid_t
*tid
)
7330 void *ddata
= note
->descdata
;
7337 /* nto_procfs_status 'pid' field is at offset 0. */
7338 elf_tdata (abfd
)->core_pid
= bfd_get_32 (abfd
, (bfd_byte
*) ddata
);
7340 /* nto_procfs_status 'tid' field is at offset 4. Pass it back. */
7341 *tid
= bfd_get_32 (abfd
, (bfd_byte
*) ddata
+ 4);
7343 /* nto_procfs_status 'flags' field is at offset 8. */
7344 flags
= bfd_get_32 (abfd
, (bfd_byte
*) ddata
+ 8);
7346 /* nto_procfs_status 'what' field is at offset 14. */
7347 if ((sig
= bfd_get_16 (abfd
, (bfd_byte
*) ddata
+ 14)) > 0)
7349 elf_tdata (abfd
)->core_signal
= sig
;
7350 elf_tdata (abfd
)->core_lwpid
= *tid
;
7353 /* _DEBUG_FLAG_CURTID (current thread) is 0x80. Some cores
7354 do not come from signals so we make sure we set the current
7355 thread just in case. */
7356 if (flags
& 0x00000080)
7357 elf_tdata (abfd
)->core_lwpid
= *tid
;
7359 /* Make a ".qnx_core_status/%d" section. */
7360 sprintf (buf
, ".qnx_core_status/%d", *tid
);
7362 name
= bfd_alloc (abfd
, strlen (buf
) + 1);
7367 sect
= bfd_make_section_anyway (abfd
, name
);
7371 sect
->size
= note
->descsz
;
7372 sect
->filepos
= note
->descpos
;
7373 sect
->flags
= SEC_HAS_CONTENTS
;
7374 sect
->alignment_power
= 2;
7376 return (elfcore_maybe_make_sect (abfd
, ".qnx_core_status", sect
));
7380 elfcore_grok_nto_gregs (bfd
*abfd
, Elf_Internal_Note
*note
, pid_t tid
)
7386 /* Make a ".reg/%d" section. */
7387 sprintf (buf
, ".reg/%d", tid
);
7389 name
= bfd_alloc (abfd
, strlen (buf
) + 1);
7394 sect
= bfd_make_section_anyway (abfd
, name
);
7398 sect
->size
= note
->descsz
;
7399 sect
->filepos
= note
->descpos
;
7400 sect
->flags
= SEC_HAS_CONTENTS
;
7401 sect
->alignment_power
= 2;
7403 /* This is the current thread. */
7404 if (elf_tdata (abfd
)->core_lwpid
== tid
)
7405 return elfcore_maybe_make_sect (abfd
, ".reg", sect
);
7410 #define BFD_QNT_CORE_INFO 7
7411 #define BFD_QNT_CORE_STATUS 8
7412 #define BFD_QNT_CORE_GREG 9
7413 #define BFD_QNT_CORE_FPREG 10
7416 elfcore_grok_nto_note (bfd
*abfd
, Elf_Internal_Note
*note
)
7418 /* Every GREG section has a STATUS section before it. Store the
7419 tid from the previous call to pass down to the next gregs
7421 static pid_t tid
= 1;
7425 case BFD_QNT_CORE_INFO
: return elfcore_make_note_pseudosection (abfd
, ".qnx_core_info", note
);
7426 case BFD_QNT_CORE_STATUS
: return elfcore_grok_nto_status (abfd
, note
, &tid
);
7427 case BFD_QNT_CORE_GREG
: return elfcore_grok_nto_gregs (abfd
, note
, tid
);
7428 case BFD_QNT_CORE_FPREG
: return elfcore_grok_prfpreg (abfd
, note
);
7429 default: return TRUE
;
7433 /* Function: elfcore_write_note
7440 size of data for note
7443 End of buffer containing note. */
7446 elfcore_write_note (bfd
*abfd
,
7454 Elf_External_Note
*xnp
;
7464 const struct elf_backend_data
*bed
;
7466 namesz
= strlen (name
) + 1;
7467 bed
= get_elf_backend_data (abfd
);
7468 pad
= -namesz
& ((1 << bed
->s
->log_file_align
) - 1);
7471 newspace
= 12 + namesz
+ pad
+ size
;
7473 p
= realloc (buf
, *bufsiz
+ newspace
);
7475 *bufsiz
+= newspace
;
7476 xnp
= (Elf_External_Note
*) dest
;
7477 H_PUT_32 (abfd
, namesz
, xnp
->namesz
);
7478 H_PUT_32 (abfd
, size
, xnp
->descsz
);
7479 H_PUT_32 (abfd
, type
, xnp
->type
);
7483 memcpy (dest
, name
, namesz
);
7491 memcpy (dest
, input
, size
);
7495 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7497 elfcore_write_prpsinfo (bfd
*abfd
,
7504 char *note_name
= "CORE";
7506 #if defined (HAVE_PSINFO_T)
7508 note_type
= NT_PSINFO
;
7511 note_type
= NT_PRPSINFO
;
7514 memset (&data
, 0, sizeof (data
));
7515 strncpy (data
.pr_fname
, fname
, sizeof (data
.pr_fname
));
7516 strncpy (data
.pr_psargs
, psargs
, sizeof (data
.pr_psargs
));
7517 return elfcore_write_note (abfd
, buf
, bufsiz
,
7518 note_name
, note_type
, &data
, sizeof (data
));
7520 #endif /* PSINFO_T or PRPSINFO_T */
7522 #if defined (HAVE_PRSTATUS_T)
7524 elfcore_write_prstatus (bfd
*abfd
,
7532 char *note_name
= "CORE";
7534 memset (&prstat
, 0, sizeof (prstat
));
7535 prstat
.pr_pid
= pid
;
7536 prstat
.pr_cursig
= cursig
;
7537 memcpy (&prstat
.pr_reg
, gregs
, sizeof (prstat
.pr_reg
));
7538 return elfcore_write_note (abfd
, buf
, bufsiz
,
7539 note_name
, NT_PRSTATUS
, &prstat
, sizeof (prstat
));
7541 #endif /* HAVE_PRSTATUS_T */
7543 #if defined (HAVE_LWPSTATUS_T)
7545 elfcore_write_lwpstatus (bfd
*abfd
,
7552 lwpstatus_t lwpstat
;
7553 char *note_name
= "CORE";
7555 memset (&lwpstat
, 0, sizeof (lwpstat
));
7556 lwpstat
.pr_lwpid
= pid
>> 16;
7557 lwpstat
.pr_cursig
= cursig
;
7558 #if defined (HAVE_LWPSTATUS_T_PR_REG)
7559 memcpy (lwpstat
.pr_reg
, gregs
, sizeof (lwpstat
.pr_reg
));
7560 #elif defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7562 memcpy (lwpstat
.pr_context
.uc_mcontext
.gregs
,
7563 gregs
, sizeof (lwpstat
.pr_context
.uc_mcontext
.gregs
));
7565 memcpy (lwpstat
.pr_context
.uc_mcontext
.__gregs
,
7566 gregs
, sizeof (lwpstat
.pr_context
.uc_mcontext
.__gregs
));
7569 return elfcore_write_note (abfd
, buf
, bufsiz
, note_name
,
7570 NT_LWPSTATUS
, &lwpstat
, sizeof (lwpstat
));
7572 #endif /* HAVE_LWPSTATUS_T */
7574 #if defined (HAVE_PSTATUS_T)
7576 elfcore_write_pstatus (bfd
*abfd
,
7584 char *note_name
= "CORE";
7586 memset (&pstat
, 0, sizeof (pstat
));
7587 pstat
.pr_pid
= pid
& 0xffff;
7588 buf
= elfcore_write_note (abfd
, buf
, bufsiz
, note_name
,
7589 NT_PSTATUS
, &pstat
, sizeof (pstat
));
7592 #endif /* HAVE_PSTATUS_T */
7595 elfcore_write_prfpreg (bfd
*abfd
,
7601 char *note_name
= "CORE";
7602 return elfcore_write_note (abfd
, buf
, bufsiz
,
7603 note_name
, NT_FPREGSET
, fpregs
, size
);
7607 elfcore_write_prxfpreg (bfd
*abfd
,
7610 const void *xfpregs
,
7613 char *note_name
= "LINUX";
7614 return elfcore_write_note (abfd
, buf
, bufsiz
,
7615 note_name
, NT_PRXFPREG
, xfpregs
, size
);
7619 elfcore_read_notes (bfd
*abfd
, file_ptr offset
, bfd_size_type size
)
7627 if (bfd_seek (abfd
, offset
, SEEK_SET
) != 0)
7630 buf
= bfd_malloc (size
);
7634 if (bfd_bread (buf
, size
, abfd
) != size
)
7642 while (p
< buf
+ size
)
7644 /* FIXME: bad alignment assumption. */
7645 Elf_External_Note
*xnp
= (Elf_External_Note
*) p
;
7646 Elf_Internal_Note in
;
7648 in
.type
= H_GET_32 (abfd
, xnp
->type
);
7650 in
.namesz
= H_GET_32 (abfd
, xnp
->namesz
);
7651 in
.namedata
= xnp
->name
;
7653 in
.descsz
= H_GET_32 (abfd
, xnp
->descsz
);
7654 in
.descdata
= in
.namedata
+ BFD_ALIGN (in
.namesz
, 4);
7655 in
.descpos
= offset
+ (in
.descdata
- buf
);
7657 if (strncmp (in
.namedata
, "NetBSD-CORE", 11) == 0)
7659 if (! elfcore_grok_netbsd_note (abfd
, &in
))
7662 else if (strncmp (in
.namedata
, "QNX", 3) == 0)
7664 if (! elfcore_grok_nto_note (abfd
, &in
))
7669 if (! elfcore_grok_note (abfd
, &in
))
7673 p
= in
.descdata
+ BFD_ALIGN (in
.descsz
, 4);
7680 /* Providing external access to the ELF program header table. */
7682 /* Return an upper bound on the number of bytes required to store a
7683 copy of ABFD's program header table entries. Return -1 if an error
7684 occurs; bfd_get_error will return an appropriate code. */
7687 bfd_get_elf_phdr_upper_bound (bfd
*abfd
)
7689 if (abfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
7691 bfd_set_error (bfd_error_wrong_format
);
7695 return elf_elfheader (abfd
)->e_phnum
* sizeof (Elf_Internal_Phdr
);
7698 /* Copy ABFD's program header table entries to *PHDRS. The entries
7699 will be stored as an array of Elf_Internal_Phdr structures, as
7700 defined in include/elf/internal.h. To find out how large the
7701 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
7703 Return the number of program header table entries read, or -1 if an
7704 error occurs; bfd_get_error will return an appropriate code. */
7707 bfd_get_elf_phdrs (bfd
*abfd
, void *phdrs
)
7711 if (abfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
7713 bfd_set_error (bfd_error_wrong_format
);
7717 num_phdrs
= elf_elfheader (abfd
)->e_phnum
;
7718 memcpy (phdrs
, elf_tdata (abfd
)->phdr
,
7719 num_phdrs
* sizeof (Elf_Internal_Phdr
));
7725 _bfd_elf_sprintf_vma (bfd
*abfd ATTRIBUTE_UNUSED
, char *buf
, bfd_vma value
)
7728 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
7730 i_ehdrp
= elf_elfheader (abfd
);
7731 if (i_ehdrp
== NULL
)
7732 sprintf_vma (buf
, value
);
7735 if (i_ehdrp
->e_ident
[EI_CLASS
] == ELFCLASS64
)
7737 #if BFD_HOST_64BIT_LONG
7738 sprintf (buf
, "%016lx", value
);
7740 sprintf (buf
, "%08lx%08lx", _bfd_int64_high (value
),
7741 _bfd_int64_low (value
));
7745 sprintf (buf
, "%08lx", (unsigned long) (value
& 0xffffffff));
7748 sprintf_vma (buf
, value
);
7753 _bfd_elf_fprintf_vma (bfd
*abfd ATTRIBUTE_UNUSED
, void *stream
, bfd_vma value
)
7756 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
7758 i_ehdrp
= elf_elfheader (abfd
);
7759 if (i_ehdrp
== NULL
)
7760 fprintf_vma ((FILE *) stream
, value
);
7763 if (i_ehdrp
->e_ident
[EI_CLASS
] == ELFCLASS64
)
7765 #if BFD_HOST_64BIT_LONG
7766 fprintf ((FILE *) stream
, "%016lx", value
);
7768 fprintf ((FILE *) stream
, "%08lx%08lx",
7769 _bfd_int64_high (value
), _bfd_int64_low (value
));
7773 fprintf ((FILE *) stream
, "%08lx",
7774 (unsigned long) (value
& 0xffffffff));
7777 fprintf_vma ((FILE *) stream
, value
);
7781 enum elf_reloc_type_class
7782 _bfd_elf_reloc_type_class (const Elf_Internal_Rela
*rela ATTRIBUTE_UNUSED
)
7784 return reloc_class_normal
;
7787 /* For RELA architectures, return the relocation value for a
7788 relocation against a local symbol. */
7791 _bfd_elf_rela_local_sym (bfd
*abfd
,
7792 Elf_Internal_Sym
*sym
,
7794 Elf_Internal_Rela
*rel
)
7796 asection
*sec
= *psec
;
7799 relocation
= (sec
->output_section
->vma
7800 + sec
->output_offset
7802 if ((sec
->flags
& SEC_MERGE
)
7803 && ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
7804 && sec
->sec_info_type
== ELF_INFO_TYPE_MERGE
)
7807 _bfd_merged_section_offset (abfd
, psec
,
7808 elf_section_data (sec
)->sec_info
,
7809 sym
->st_value
+ rel
->r_addend
);
7812 /* If we have changed the section, and our original section is
7813 marked with SEC_EXCLUDE, it means that the original
7814 SEC_MERGE section has been completely subsumed in some
7815 other SEC_MERGE section. In this case, we need to leave
7816 some info around for --emit-relocs. */
7817 if ((sec
->flags
& SEC_EXCLUDE
) != 0)
7818 sec
->kept_section
= *psec
;
7821 rel
->r_addend
-= relocation
;
7822 rel
->r_addend
+= sec
->output_section
->vma
+ sec
->output_offset
;
7828 _bfd_elf_rel_local_sym (bfd
*abfd
,
7829 Elf_Internal_Sym
*sym
,
7833 asection
*sec
= *psec
;
7835 if (sec
->sec_info_type
!= ELF_INFO_TYPE_MERGE
)
7836 return sym
->st_value
+ addend
;
7838 return _bfd_merged_section_offset (abfd
, psec
,
7839 elf_section_data (sec
)->sec_info
,
7840 sym
->st_value
+ addend
);
7844 _bfd_elf_section_offset (bfd
*abfd
,
7845 struct bfd_link_info
*info
,
7849 switch (sec
->sec_info_type
)
7851 case ELF_INFO_TYPE_STABS
:
7852 return _bfd_stab_section_offset (sec
, elf_section_data (sec
)->sec_info
,
7854 case ELF_INFO_TYPE_EH_FRAME
:
7855 return _bfd_elf_eh_frame_section_offset (abfd
, info
, sec
, offset
);
7861 /* Create a new BFD as if by bfd_openr. Rather than opening a file,
7862 reconstruct an ELF file by reading the segments out of remote memory
7863 based on the ELF file header at EHDR_VMA and the ELF program headers it
7864 points to. If not null, *LOADBASEP is filled in with the difference
7865 between the VMAs from which the segments were read, and the VMAs the
7866 file headers (and hence BFD's idea of each section's VMA) put them at.
7868 The function TARGET_READ_MEMORY is called to copy LEN bytes from the
7869 remote memory at target address VMA into the local buffer at MYADDR; it
7870 should return zero on success or an `errno' code on failure. TEMPL must
7871 be a BFD for an ELF target with the word size and byte order found in
7872 the remote memory. */
7875 bfd_elf_bfd_from_remote_memory
7879 int (*target_read_memory
) (bfd_vma
, char *, int))
7881 return (*get_elf_backend_data (templ
)->elf_backend_bfd_from_remote_memory
)
7882 (templ
, ehdr_vma
, loadbasep
, target_read_memory
);
7886 _bfd_elf_get_synthetic_symtab (bfd
*abfd
,
7887 long symcount ATTRIBUTE_UNUSED
,
7888 asymbol
**syms ATTRIBUTE_UNUSED
,
7889 long dynsymcount ATTRIBUTE_UNUSED
,
7893 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
7896 const char *relplt_name
;
7897 bfd_boolean (*slurp_relocs
) (bfd
*, asection
*, asymbol
**, bfd_boolean
);
7901 Elf_Internal_Shdr
*hdr
;
7905 if ((abfd
->flags
& (DYNAMIC
| EXEC_P
)) == 0)
7909 if (!bed
->plt_sym_val
)
7912 relplt_name
= bed
->relplt_name
;
7913 if (relplt_name
== NULL
)
7914 relplt_name
= bed
->default_use_rela_p
? ".rela.plt" : ".rel.plt";
7915 relplt
= bfd_get_section_by_name (abfd
, relplt_name
);
7919 hdr
= &elf_section_data (relplt
)->this_hdr
;
7920 if (hdr
->sh_link
!= elf_dynsymtab (abfd
)
7921 || (hdr
->sh_type
!= SHT_REL
&& hdr
->sh_type
!= SHT_RELA
))
7924 plt
= bfd_get_section_by_name (abfd
, ".plt");
7928 slurp_relocs
= get_elf_backend_data (abfd
)->s
->slurp_reloc_table
;
7929 if (! (*slurp_relocs
) (abfd
, relplt
, dynsyms
, TRUE
))
7932 count
= relplt
->size
/ hdr
->sh_entsize
;
7933 size
= count
* sizeof (asymbol
);
7934 p
= relplt
->relocation
;
7935 for (i
= 0; i
< count
; i
++, s
++, p
++)
7936 size
+= strlen ((*p
->sym_ptr_ptr
)->name
) + sizeof ("@plt");
7938 s
= *ret
= bfd_malloc (size
);
7942 names
= (char *) (s
+ count
);
7943 p
= relplt
->relocation
;
7945 for (i
= 0; i
< count
; i
++, s
++, p
++)
7950 addr
= bed
->plt_sym_val (i
, plt
, p
);
7951 if (addr
== (bfd_vma
) -1)
7954 *s
= **p
->sym_ptr_ptr
;
7956 s
->value
= addr
- plt
->vma
;
7958 len
= strlen ((*p
->sym_ptr_ptr
)->name
);
7959 memcpy (names
, (*p
->sym_ptr_ptr
)->name
, len
);
7961 memcpy (names
, "@plt", sizeof ("@plt"));
7962 names
+= sizeof ("@plt");
7969 /* Sort symbol by binding and section. We want to put definitions
7970 sorted by section at the beginning. */
7973 elf_sort_elf_symbol (const void *arg1
, const void *arg2
)
7975 const Elf_Internal_Sym
*s1
;
7976 const Elf_Internal_Sym
*s2
;
7979 /* Make sure that undefined symbols are at the end. */
7980 s1
= (const Elf_Internal_Sym
*) arg1
;
7981 if (s1
->st_shndx
== SHN_UNDEF
)
7983 s2
= (const Elf_Internal_Sym
*) arg2
;
7984 if (s2
->st_shndx
== SHN_UNDEF
)
7987 /* Sorted by section index. */
7988 shndx
= s1
->st_shndx
- s2
->st_shndx
;
7992 /* Sorted by binding. */
7993 return ELF_ST_BIND (s1
->st_info
) - ELF_ST_BIND (s2
->st_info
);
7998 Elf_Internal_Sym
*sym
;
8003 elf_sym_name_compare (const void *arg1
, const void *arg2
)
8005 const struct elf_symbol
*s1
= (const struct elf_symbol
*) arg1
;
8006 const struct elf_symbol
*s2
= (const struct elf_symbol
*) arg2
;
8007 return strcmp (s1
->name
, s2
->name
);
8010 /* Check if 2 sections define the same set of local and global
8014 bfd_elf_match_symbols_in_sections (asection
*sec1
, asection
*sec2
)
8017 const struct elf_backend_data
*bed1
, *bed2
;
8018 Elf_Internal_Shdr
*hdr1
, *hdr2
;
8019 bfd_size_type symcount1
, symcount2
;
8020 Elf_Internal_Sym
*isymbuf1
, *isymbuf2
;
8021 Elf_Internal_Sym
*isymstart1
= NULL
, *isymstart2
= NULL
, *isym
;
8022 Elf_Internal_Sym
*isymend
;
8023 struct elf_symbol
*symp
, *symtable1
= NULL
, *symtable2
= NULL
;
8024 bfd_size_type count1
, count2
, i
;
8031 /* If both are .gnu.linkonce sections, they have to have the same
8033 if (strncmp (sec1
->name
, ".gnu.linkonce",
8034 sizeof ".gnu.linkonce" - 1) == 0
8035 && strncmp (sec2
->name
, ".gnu.linkonce",
8036 sizeof ".gnu.linkonce" - 1) == 0)
8037 return strcmp (sec1
->name
+ sizeof ".gnu.linkonce",
8038 sec2
->name
+ sizeof ".gnu.linkonce") == 0;
8040 /* Both sections have to be in ELF. */
8041 if (bfd_get_flavour (bfd1
) != bfd_target_elf_flavour
8042 || bfd_get_flavour (bfd2
) != bfd_target_elf_flavour
)
8045 if (elf_section_type (sec1
) != elf_section_type (sec2
))
8048 if ((elf_section_flags (sec1
) & SHF_GROUP
) != 0
8049 && (elf_section_flags (sec2
) & SHF_GROUP
) != 0)
8051 /* If both are members of section groups, they have to have the
8053 if (strcmp (elf_group_name (sec1
), elf_group_name (sec2
)) != 0)
8057 shndx1
= _bfd_elf_section_from_bfd_section (bfd1
, sec1
);
8058 shndx2
= _bfd_elf_section_from_bfd_section (bfd2
, sec2
);
8059 if (shndx1
== -1 || shndx2
== -1)
8062 bed1
= get_elf_backend_data (bfd1
);
8063 bed2
= get_elf_backend_data (bfd2
);
8064 hdr1
= &elf_tdata (bfd1
)->symtab_hdr
;
8065 symcount1
= hdr1
->sh_size
/ bed1
->s
->sizeof_sym
;
8066 hdr2
= &elf_tdata (bfd2
)->symtab_hdr
;
8067 symcount2
= hdr2
->sh_size
/ bed2
->s
->sizeof_sym
;
8069 if (symcount1
== 0 || symcount2
== 0)
8072 isymbuf1
= bfd_elf_get_elf_syms (bfd1
, hdr1
, symcount1
, 0,
8074 isymbuf2
= bfd_elf_get_elf_syms (bfd2
, hdr2
, symcount2
, 0,
8078 if (isymbuf1
== NULL
|| isymbuf2
== NULL
)
8081 /* Sort symbols by binding and section. Global definitions are at
8083 qsort (isymbuf1
, symcount1
, sizeof (Elf_Internal_Sym
),
8084 elf_sort_elf_symbol
);
8085 qsort (isymbuf2
, symcount2
, sizeof (Elf_Internal_Sym
),
8086 elf_sort_elf_symbol
);
8088 /* Count definitions in the section. */
8090 for (isym
= isymbuf1
, isymend
= isym
+ symcount1
;
8091 isym
< isymend
; isym
++)
8093 if (isym
->st_shndx
== (unsigned int) shndx1
)
8100 if (count1
&& isym
->st_shndx
!= (unsigned int) shndx1
)
8105 for (isym
= isymbuf2
, isymend
= isym
+ symcount2
;
8106 isym
< isymend
; isym
++)
8108 if (isym
->st_shndx
== (unsigned int) shndx2
)
8115 if (count2
&& isym
->st_shndx
!= (unsigned int) shndx2
)
8119 if (count1
== 0 || count2
== 0 || count1
!= count2
)
8122 symtable1
= bfd_malloc (count1
* sizeof (struct elf_symbol
));
8123 symtable2
= bfd_malloc (count1
* sizeof (struct elf_symbol
));
8125 if (symtable1
== NULL
|| symtable2
== NULL
)
8129 for (isym
= isymstart1
, isymend
= isym
+ count1
;
8130 isym
< isymend
; isym
++)
8133 symp
->name
= bfd_elf_string_from_elf_section (bfd1
,
8140 for (isym
= isymstart2
, isymend
= isym
+ count1
;
8141 isym
< isymend
; isym
++)
8144 symp
->name
= bfd_elf_string_from_elf_section (bfd2
,
8150 /* Sort symbol by name. */
8151 qsort (symtable1
, count1
, sizeof (struct elf_symbol
),
8152 elf_sym_name_compare
);
8153 qsort (symtable2
, count1
, sizeof (struct elf_symbol
),
8154 elf_sym_name_compare
);
8156 for (i
= 0; i
< count1
; i
++)
8157 /* Two symbols must have the same binding, type and name. */
8158 if (symtable1
[i
].sym
->st_info
!= symtable2
[i
].sym
->st_info
8159 || symtable1
[i
].sym
->st_other
!= symtable2
[i
].sym
->st_other
8160 || strcmp (symtable1
[i
].name
, symtable2
[i
].name
) != 0)