1 /* ELF executable support for BFD.
3 Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
4 2002, 2003, 2004, 2005 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 bfd_byte
*shstrtab
= NULL
;
258 bfd_size_type shstrtabsize
;
260 i_shdrp
= elf_elfsections (abfd
);
261 if (i_shdrp
== 0 || i_shdrp
[shindex
] == 0)
264 shstrtab
= 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
;
273 return (char *) 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 unsigned int shstrndx
= elf_elfheader(abfd
)->e_shstrndx
;
295 (*_bfd_error_handler
)
296 (_("%B: invalid string offset %u >= %lu for section `%s'"),
297 abfd
, strindex
, (unsigned long) hdr
->sh_size
,
298 (shindex
== shstrndx
&& strindex
== hdr
->sh_name
300 : bfd_elf_string_from_elf_section (abfd
, shstrndx
, 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_sym_name (bfd
*abfd
,
409 Elf_Internal_Shdr
*symtab_hdr
,
410 Elf_Internal_Sym
*isym
)
412 unsigned int iname
= isym
->st_name
;
413 unsigned int shindex
= symtab_hdr
->sh_link
;
414 if (iname
== 0 && ELF_ST_TYPE (isym
->st_info
) == STT_SECTION
415 /* Check for a bogus st_shndx to avoid crashing. */
416 && isym
->st_shndx
< elf_numsections (abfd
)
417 && !(isym
->st_shndx
>= SHN_LORESERVE
&& isym
->st_shndx
<= SHN_HIRESERVE
))
419 iname
= elf_elfsections (abfd
)[isym
->st_shndx
]->sh_name
;
420 shindex
= elf_elfheader (abfd
)->e_shstrndx
;
423 return bfd_elf_string_from_elf_section (abfd
, shindex
, iname
);
426 /* Elf_Internal_Shdr->contents is an array of these for SHT_GROUP
427 sections. The first element is the flags, the rest are section
430 typedef union elf_internal_group
{
431 Elf_Internal_Shdr
*shdr
;
433 } Elf_Internal_Group
;
435 /* Return the name of the group signature symbol. Why isn't the
436 signature just a string? */
439 group_signature (bfd
*abfd
, Elf_Internal_Shdr
*ghdr
)
441 Elf_Internal_Shdr
*hdr
;
442 unsigned char esym
[sizeof (Elf64_External_Sym
)];
443 Elf_External_Sym_Shndx eshndx
;
444 Elf_Internal_Sym isym
;
446 /* First we need to ensure the symbol table is available. */
447 if (! bfd_section_from_shdr (abfd
, ghdr
->sh_link
))
450 /* Go read the symbol. */
451 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
452 if (bfd_elf_get_elf_syms (abfd
, hdr
, 1, ghdr
->sh_info
,
453 &isym
, esym
, &eshndx
) == NULL
)
456 return bfd_elf_sym_name (abfd
, hdr
, &isym
);
459 /* Set next_in_group list pointer, and group name for NEWSECT. */
462 setup_group (bfd
*abfd
, Elf_Internal_Shdr
*hdr
, asection
*newsect
)
464 unsigned int num_group
= elf_tdata (abfd
)->num_group
;
466 /* If num_group is zero, read in all SHT_GROUP sections. The count
467 is set to -1 if there are no SHT_GROUP sections. */
470 unsigned int i
, shnum
;
472 /* First count the number of groups. If we have a SHT_GROUP
473 section with just a flag word (ie. sh_size is 4), ignore it. */
474 shnum
= elf_numsections (abfd
);
476 for (i
= 0; i
< shnum
; i
++)
478 Elf_Internal_Shdr
*shdr
= elf_elfsections (abfd
)[i
];
479 if (shdr
->sh_type
== SHT_GROUP
&& shdr
->sh_size
>= 8)
484 num_group
= (unsigned) -1;
485 elf_tdata (abfd
)->num_group
= num_group
;
489 /* We keep a list of elf section headers for group sections,
490 so we can find them quickly. */
491 bfd_size_type amt
= num_group
* sizeof (Elf_Internal_Shdr
*);
492 elf_tdata (abfd
)->group_sect_ptr
= bfd_alloc (abfd
, amt
);
493 if (elf_tdata (abfd
)->group_sect_ptr
== NULL
)
497 for (i
= 0; i
< shnum
; i
++)
499 Elf_Internal_Shdr
*shdr
= elf_elfsections (abfd
)[i
];
500 if (shdr
->sh_type
== SHT_GROUP
&& shdr
->sh_size
>= 8)
503 Elf_Internal_Group
*dest
;
505 /* Add to list of sections. */
506 elf_tdata (abfd
)->group_sect_ptr
[num_group
] = shdr
;
509 /* Read the raw contents. */
510 BFD_ASSERT (sizeof (*dest
) >= 4);
511 amt
= shdr
->sh_size
* sizeof (*dest
) / 4;
512 shdr
->contents
= bfd_alloc (abfd
, amt
);
513 if (shdr
->contents
== NULL
514 || bfd_seek (abfd
, shdr
->sh_offset
, SEEK_SET
) != 0
515 || (bfd_bread (shdr
->contents
, shdr
->sh_size
, abfd
)
519 /* Translate raw contents, a flag word followed by an
520 array of elf section indices all in target byte order,
521 to the flag word followed by an array of elf section
523 src
= shdr
->contents
+ shdr
->sh_size
;
524 dest
= (Elf_Internal_Group
*) (shdr
->contents
+ amt
);
531 idx
= H_GET_32 (abfd
, src
);
532 if (src
== shdr
->contents
)
535 if (shdr
->bfd_section
!= NULL
&& (idx
& GRP_COMDAT
))
536 shdr
->bfd_section
->flags
537 |= SEC_LINK_ONCE
| SEC_LINK_DUPLICATES_DISCARD
;
542 ((*_bfd_error_handler
)
543 (_("%B: invalid SHT_GROUP entry"), abfd
));
546 dest
->shdr
= elf_elfsections (abfd
)[idx
];
553 if (num_group
!= (unsigned) -1)
557 for (i
= 0; i
< num_group
; i
++)
559 Elf_Internal_Shdr
*shdr
= elf_tdata (abfd
)->group_sect_ptr
[i
];
560 Elf_Internal_Group
*idx
= (Elf_Internal_Group
*) shdr
->contents
;
561 unsigned int n_elt
= shdr
->sh_size
/ 4;
563 /* Look through this group's sections to see if current
564 section is a member. */
566 if ((++idx
)->shdr
== hdr
)
570 /* We are a member of this group. Go looking through
571 other members to see if any others are linked via
573 idx
= (Elf_Internal_Group
*) shdr
->contents
;
574 n_elt
= shdr
->sh_size
/ 4;
576 if ((s
= (++idx
)->shdr
->bfd_section
) != NULL
577 && elf_next_in_group (s
) != NULL
)
581 /* Snarf the group name from other member, and
582 insert current section in circular list. */
583 elf_group_name (newsect
) = elf_group_name (s
);
584 elf_next_in_group (newsect
) = elf_next_in_group (s
);
585 elf_next_in_group (s
) = newsect
;
591 gname
= group_signature (abfd
, shdr
);
594 elf_group_name (newsect
) = gname
;
596 /* Start a circular list with one element. */
597 elf_next_in_group (newsect
) = newsect
;
600 /* If the group section has been created, point to the
602 if (shdr
->bfd_section
!= NULL
)
603 elf_next_in_group (shdr
->bfd_section
) = newsect
;
611 if (elf_group_name (newsect
) == NULL
)
613 (*_bfd_error_handler
) (_("%B: no group info for section %A"),
620 _bfd_elf_setup_group_pointers (bfd
*abfd
)
623 unsigned int num_group
= elf_tdata (abfd
)->num_group
;
624 bfd_boolean result
= TRUE
;
626 if (num_group
== (unsigned) -1)
629 for (i
= 0; i
< num_group
; i
++)
631 Elf_Internal_Shdr
*shdr
= elf_tdata (abfd
)->group_sect_ptr
[i
];
632 Elf_Internal_Group
*idx
= (Elf_Internal_Group
*) shdr
->contents
;
633 unsigned int n_elt
= shdr
->sh_size
/ 4;
636 if ((++idx
)->shdr
->bfd_section
)
637 elf_sec_group (idx
->shdr
->bfd_section
) = shdr
->bfd_section
;
638 else if (idx
->shdr
->sh_type
== SHT_RELA
639 || idx
->shdr
->sh_type
== SHT_REL
)
640 /* We won't include relocation sections in section groups in
641 output object files. We adjust the group section size here
642 so that relocatable link will work correctly when
643 relocation sections are in section group in input object
645 shdr
->bfd_section
->size
-= 4;
648 /* There are some unknown sections in the group. */
649 (*_bfd_error_handler
)
650 (_("%B: unknown [%d] section `%s' in group [%s]"),
652 (unsigned int) idx
->shdr
->sh_type
,
653 bfd_elf_string_from_elf_section (abfd
,
654 (elf_elfheader (abfd
)
657 shdr
->bfd_section
->name
);
665 bfd_elf_is_group_section (bfd
*abfd ATTRIBUTE_UNUSED
, const asection
*sec
)
667 return elf_next_in_group (sec
) != NULL
;
670 /* Make a BFD section from an ELF section. We store a pointer to the
671 BFD section in the bfd_section field of the header. */
674 _bfd_elf_make_section_from_shdr (bfd
*abfd
,
675 Elf_Internal_Shdr
*hdr
,
681 const struct elf_backend_data
*bed
;
683 if (hdr
->bfd_section
!= NULL
)
685 BFD_ASSERT (strcmp (name
,
686 bfd_get_section_name (abfd
, hdr
->bfd_section
)) == 0);
690 newsect
= bfd_make_section_anyway (abfd
, name
);
694 hdr
->bfd_section
= newsect
;
695 elf_section_data (newsect
)->this_hdr
= *hdr
;
696 elf_section_data (newsect
)->this_idx
= shindex
;
698 /* Always use the real type/flags. */
699 elf_section_type (newsect
) = hdr
->sh_type
;
700 elf_section_flags (newsect
) = hdr
->sh_flags
;
702 newsect
->filepos
= hdr
->sh_offset
;
704 if (! bfd_set_section_vma (abfd
, newsect
, hdr
->sh_addr
)
705 || ! bfd_set_section_size (abfd
, newsect
, hdr
->sh_size
)
706 || ! bfd_set_section_alignment (abfd
, newsect
,
707 bfd_log2 ((bfd_vma
) hdr
->sh_addralign
)))
710 flags
= SEC_NO_FLAGS
;
711 if (hdr
->sh_type
!= SHT_NOBITS
)
712 flags
|= SEC_HAS_CONTENTS
;
713 if (hdr
->sh_type
== SHT_GROUP
)
714 flags
|= SEC_GROUP
| SEC_EXCLUDE
;
715 if ((hdr
->sh_flags
& SHF_ALLOC
) != 0)
718 if (hdr
->sh_type
!= SHT_NOBITS
)
721 if ((hdr
->sh_flags
& SHF_WRITE
) == 0)
722 flags
|= SEC_READONLY
;
723 if ((hdr
->sh_flags
& SHF_EXECINSTR
) != 0)
725 else if ((flags
& SEC_LOAD
) != 0)
727 if ((hdr
->sh_flags
& SHF_MERGE
) != 0)
730 newsect
->entsize
= hdr
->sh_entsize
;
731 if ((hdr
->sh_flags
& SHF_STRINGS
) != 0)
732 flags
|= SEC_STRINGS
;
734 if (hdr
->sh_flags
& SHF_GROUP
)
735 if (!setup_group (abfd
, hdr
, newsect
))
737 if ((hdr
->sh_flags
& SHF_TLS
) != 0)
738 flags
|= SEC_THREAD_LOCAL
;
740 /* The debugging sections appear to be recognized only by name, not
743 static const char *debug_sec_names
[] =
752 for (i
= ARRAY_SIZE (debug_sec_names
); i
--;)
753 if (strncmp (name
, debug_sec_names
[i
], strlen (debug_sec_names
[i
])) == 0)
757 flags
|= SEC_DEBUGGING
;
760 /* As a GNU extension, if the name begins with .gnu.linkonce, we
761 only link a single copy of the section. This is used to support
762 g++. g++ will emit each template expansion in its own section.
763 The symbols will be defined as weak, so that multiple definitions
764 are permitted. The GNU linker extension is to actually discard
765 all but one of the sections. */
766 if (strncmp (name
, ".gnu.linkonce", sizeof ".gnu.linkonce" - 1) == 0
767 && elf_next_in_group (newsect
) == NULL
)
768 flags
|= SEC_LINK_ONCE
| SEC_LINK_DUPLICATES_DISCARD
;
770 bed
= get_elf_backend_data (abfd
);
771 if (bed
->elf_backend_section_flags
)
772 if (! bed
->elf_backend_section_flags (&flags
, hdr
))
775 if (! bfd_set_section_flags (abfd
, newsect
, flags
))
778 if ((flags
& SEC_ALLOC
) != 0)
780 Elf_Internal_Phdr
*phdr
;
783 /* Look through the phdrs to see if we need to adjust the lma.
784 If all the p_paddr fields are zero, we ignore them, since
785 some ELF linkers produce such output. */
786 phdr
= elf_tdata (abfd
)->phdr
;
787 for (i
= 0; i
< elf_elfheader (abfd
)->e_phnum
; i
++, phdr
++)
789 if (phdr
->p_paddr
!= 0)
792 if (i
< elf_elfheader (abfd
)->e_phnum
)
794 phdr
= elf_tdata (abfd
)->phdr
;
795 for (i
= 0; i
< elf_elfheader (abfd
)->e_phnum
; i
++, phdr
++)
797 /* This section is part of this segment if its file
798 offset plus size lies within the segment's memory
799 span and, if the section is loaded, the extent of the
800 loaded data lies within the extent of the segment.
802 Note - we used to check the p_paddr field as well, and
803 refuse to set the LMA if it was 0. This is wrong
804 though, as a perfectly valid initialised segment can
805 have a p_paddr of zero. Some architectures, eg ARM,
806 place special significance on the address 0 and
807 executables need to be able to have a segment which
808 covers this address. */
809 if (phdr
->p_type
== PT_LOAD
810 && (bfd_vma
) hdr
->sh_offset
>= phdr
->p_offset
811 && (hdr
->sh_offset
+ hdr
->sh_size
812 <= phdr
->p_offset
+ phdr
->p_memsz
)
813 && ((flags
& SEC_LOAD
) == 0
814 || (hdr
->sh_offset
+ hdr
->sh_size
815 <= phdr
->p_offset
+ phdr
->p_filesz
)))
817 if ((flags
& SEC_LOAD
) == 0)
818 newsect
->lma
= (phdr
->p_paddr
819 + hdr
->sh_addr
- phdr
->p_vaddr
);
821 /* We used to use the same adjustment for SEC_LOAD
822 sections, but that doesn't work if the segment
823 is packed with code from multiple VMAs.
824 Instead we calculate the section LMA based on
825 the segment LMA. It is assumed that the
826 segment will contain sections with contiguous
827 LMAs, even if the VMAs are not. */
828 newsect
->lma
= (phdr
->p_paddr
829 + hdr
->sh_offset
- phdr
->p_offset
);
831 /* With contiguous segments, we can't tell from file
832 offsets whether a section with zero size should
833 be placed at the end of one segment or the
834 beginning of the next. Decide based on vaddr. */
835 if (hdr
->sh_addr
>= phdr
->p_vaddr
836 && (hdr
->sh_addr
+ hdr
->sh_size
837 <= phdr
->p_vaddr
+ phdr
->p_memsz
))
852 struct elf_internal_shdr *bfd_elf_find_section (bfd *abfd, char *name);
855 Helper functions for GDB to locate the string tables.
856 Since BFD hides string tables from callers, GDB needs to use an
857 internal hook to find them. Sun's .stabstr, in particular,
858 isn't even pointed to by the .stab section, so ordinary
859 mechanisms wouldn't work to find it, even if we had some.
862 struct elf_internal_shdr
*
863 bfd_elf_find_section (bfd
*abfd
, char *name
)
865 Elf_Internal_Shdr
**i_shdrp
;
870 i_shdrp
= elf_elfsections (abfd
);
873 shstrtab
= bfd_elf_get_str_section (abfd
,
874 elf_elfheader (abfd
)->e_shstrndx
);
875 if (shstrtab
!= NULL
)
877 max
= elf_numsections (abfd
);
878 for (i
= 1; i
< max
; i
++)
879 if (!strcmp (&shstrtab
[i_shdrp
[i
]->sh_name
], name
))
886 const char *const bfd_elf_section_type_names
[] = {
887 "SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB",
888 "SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE",
889 "SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM",
892 /* ELF relocs are against symbols. If we are producing relocatable
893 output, and the reloc is against an external symbol, and nothing
894 has given us any additional addend, the resulting reloc will also
895 be against the same symbol. In such a case, we don't want to
896 change anything about the way the reloc is handled, since it will
897 all be done at final link time. Rather than put special case code
898 into bfd_perform_relocation, all the reloc types use this howto
899 function. It just short circuits the reloc if producing
900 relocatable output against an external symbol. */
902 bfd_reloc_status_type
903 bfd_elf_generic_reloc (bfd
*abfd ATTRIBUTE_UNUSED
,
904 arelent
*reloc_entry
,
906 void *data ATTRIBUTE_UNUSED
,
907 asection
*input_section
,
909 char **error_message ATTRIBUTE_UNUSED
)
911 if (output_bfd
!= NULL
912 && (symbol
->flags
& BSF_SECTION_SYM
) == 0
913 && (! reloc_entry
->howto
->partial_inplace
914 || reloc_entry
->addend
== 0))
916 reloc_entry
->address
+= input_section
->output_offset
;
920 return bfd_reloc_continue
;
923 /* Make sure sec_info_type is cleared if sec_info is cleared too. */
926 merge_sections_remove_hook (bfd
*abfd ATTRIBUTE_UNUSED
,
929 BFD_ASSERT (sec
->sec_info_type
== ELF_INFO_TYPE_MERGE
);
930 sec
->sec_info_type
= ELF_INFO_TYPE_NONE
;
933 /* Finish SHF_MERGE section merging. */
936 _bfd_elf_merge_sections (bfd
*abfd
, struct bfd_link_info
*info
)
941 if (!is_elf_hash_table (info
->hash
))
944 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
945 if ((ibfd
->flags
& DYNAMIC
) == 0)
946 for (sec
= ibfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
947 if ((sec
->flags
& SEC_MERGE
) != 0
948 && !bfd_is_abs_section (sec
->output_section
))
950 struct bfd_elf_section_data
*secdata
;
952 secdata
= elf_section_data (sec
);
953 if (! _bfd_add_merge_section (abfd
,
954 &elf_hash_table (info
)->merge_info
,
955 sec
, &secdata
->sec_info
))
957 else if (secdata
->sec_info
)
958 sec
->sec_info_type
= ELF_INFO_TYPE_MERGE
;
961 if (elf_hash_table (info
)->merge_info
!= NULL
)
962 _bfd_merge_sections (abfd
, info
, elf_hash_table (info
)->merge_info
,
963 merge_sections_remove_hook
);
968 _bfd_elf_link_just_syms (asection
*sec
, struct bfd_link_info
*info
)
970 sec
->output_section
= bfd_abs_section_ptr
;
971 sec
->output_offset
= sec
->vma
;
972 if (!is_elf_hash_table (info
->hash
))
975 sec
->sec_info_type
= ELF_INFO_TYPE_JUST_SYMS
;
978 /* Copy the program header and other data from one object module to
982 _bfd_elf_copy_private_bfd_data (bfd
*ibfd
, bfd
*obfd
)
984 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
985 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
988 BFD_ASSERT (!elf_flags_init (obfd
)
989 || (elf_elfheader (obfd
)->e_flags
990 == elf_elfheader (ibfd
)->e_flags
));
992 elf_gp (obfd
) = elf_gp (ibfd
);
993 elf_elfheader (obfd
)->e_flags
= elf_elfheader (ibfd
)->e_flags
;
994 elf_flags_init (obfd
) = TRUE
;
998 /* Print out the program headers. */
1001 _bfd_elf_print_private_bfd_data (bfd
*abfd
, void *farg
)
1004 Elf_Internal_Phdr
*p
;
1006 bfd_byte
*dynbuf
= NULL
;
1008 p
= elf_tdata (abfd
)->phdr
;
1013 fprintf (f
, _("\nProgram Header:\n"));
1014 c
= elf_elfheader (abfd
)->e_phnum
;
1015 for (i
= 0; i
< c
; i
++, p
++)
1022 case PT_NULL
: pt
= "NULL"; break;
1023 case PT_LOAD
: pt
= "LOAD"; break;
1024 case PT_DYNAMIC
: pt
= "DYNAMIC"; break;
1025 case PT_INTERP
: pt
= "INTERP"; break;
1026 case PT_NOTE
: pt
= "NOTE"; break;
1027 case PT_SHLIB
: pt
= "SHLIB"; break;
1028 case PT_PHDR
: pt
= "PHDR"; break;
1029 case PT_TLS
: pt
= "TLS"; break;
1030 case PT_GNU_EH_FRAME
: pt
= "EH_FRAME"; break;
1031 case PT_GNU_STACK
: pt
= "STACK"; break;
1032 case PT_GNU_RELRO
: pt
= "RELRO"; break;
1033 default: sprintf (buf
, "0x%lx", p
->p_type
); pt
= buf
; break;
1035 fprintf (f
, "%8s off 0x", pt
);
1036 bfd_fprintf_vma (abfd
, f
, p
->p_offset
);
1037 fprintf (f
, " vaddr 0x");
1038 bfd_fprintf_vma (abfd
, f
, p
->p_vaddr
);
1039 fprintf (f
, " paddr 0x");
1040 bfd_fprintf_vma (abfd
, f
, p
->p_paddr
);
1041 fprintf (f
, " align 2**%u\n", bfd_log2 (p
->p_align
));
1042 fprintf (f
, " filesz 0x");
1043 bfd_fprintf_vma (abfd
, f
, p
->p_filesz
);
1044 fprintf (f
, " memsz 0x");
1045 bfd_fprintf_vma (abfd
, f
, p
->p_memsz
);
1046 fprintf (f
, " flags %c%c%c",
1047 (p
->p_flags
& PF_R
) != 0 ? 'r' : '-',
1048 (p
->p_flags
& PF_W
) != 0 ? 'w' : '-',
1049 (p
->p_flags
& PF_X
) != 0 ? 'x' : '-');
1050 if ((p
->p_flags
&~ (unsigned) (PF_R
| PF_W
| PF_X
)) != 0)
1051 fprintf (f
, " %lx", p
->p_flags
&~ (unsigned) (PF_R
| PF_W
| PF_X
));
1056 s
= bfd_get_section_by_name (abfd
, ".dynamic");
1060 unsigned long shlink
;
1061 bfd_byte
*extdyn
, *extdynend
;
1063 void (*swap_dyn_in
) (bfd
*, const void *, Elf_Internal_Dyn
*);
1065 fprintf (f
, _("\nDynamic Section:\n"));
1067 if (!bfd_malloc_and_get_section (abfd
, s
, &dynbuf
))
1070 elfsec
= _bfd_elf_section_from_bfd_section (abfd
, s
);
1073 shlink
= elf_elfsections (abfd
)[elfsec
]->sh_link
;
1075 extdynsize
= get_elf_backend_data (abfd
)->s
->sizeof_dyn
;
1076 swap_dyn_in
= get_elf_backend_data (abfd
)->s
->swap_dyn_in
;
1079 extdynend
= extdyn
+ s
->size
;
1080 for (; extdyn
< extdynend
; extdyn
+= extdynsize
)
1082 Elf_Internal_Dyn dyn
;
1085 bfd_boolean stringp
;
1087 (*swap_dyn_in
) (abfd
, extdyn
, &dyn
);
1089 if (dyn
.d_tag
== DT_NULL
)
1096 sprintf (ab
, "0x%lx", (unsigned long) dyn
.d_tag
);
1100 case DT_NEEDED
: name
= "NEEDED"; stringp
= TRUE
; break;
1101 case DT_PLTRELSZ
: name
= "PLTRELSZ"; break;
1102 case DT_PLTGOT
: name
= "PLTGOT"; break;
1103 case DT_HASH
: name
= "HASH"; break;
1104 case DT_STRTAB
: name
= "STRTAB"; break;
1105 case DT_SYMTAB
: name
= "SYMTAB"; break;
1106 case DT_RELA
: name
= "RELA"; break;
1107 case DT_RELASZ
: name
= "RELASZ"; break;
1108 case DT_RELAENT
: name
= "RELAENT"; break;
1109 case DT_STRSZ
: name
= "STRSZ"; break;
1110 case DT_SYMENT
: name
= "SYMENT"; break;
1111 case DT_INIT
: name
= "INIT"; break;
1112 case DT_FINI
: name
= "FINI"; break;
1113 case DT_SONAME
: name
= "SONAME"; stringp
= TRUE
; break;
1114 case DT_RPATH
: name
= "RPATH"; stringp
= TRUE
; break;
1115 case DT_SYMBOLIC
: name
= "SYMBOLIC"; break;
1116 case DT_REL
: name
= "REL"; break;
1117 case DT_RELSZ
: name
= "RELSZ"; break;
1118 case DT_RELENT
: name
= "RELENT"; break;
1119 case DT_PLTREL
: name
= "PLTREL"; break;
1120 case DT_DEBUG
: name
= "DEBUG"; break;
1121 case DT_TEXTREL
: name
= "TEXTREL"; break;
1122 case DT_JMPREL
: name
= "JMPREL"; break;
1123 case DT_BIND_NOW
: name
= "BIND_NOW"; break;
1124 case DT_INIT_ARRAY
: name
= "INIT_ARRAY"; break;
1125 case DT_FINI_ARRAY
: name
= "FINI_ARRAY"; break;
1126 case DT_INIT_ARRAYSZ
: name
= "INIT_ARRAYSZ"; break;
1127 case DT_FINI_ARRAYSZ
: name
= "FINI_ARRAYSZ"; break;
1128 case DT_RUNPATH
: name
= "RUNPATH"; stringp
= TRUE
; break;
1129 case DT_FLAGS
: name
= "FLAGS"; break;
1130 case DT_PREINIT_ARRAY
: name
= "PREINIT_ARRAY"; break;
1131 case DT_PREINIT_ARRAYSZ
: name
= "PREINIT_ARRAYSZ"; break;
1132 case DT_CHECKSUM
: name
= "CHECKSUM"; break;
1133 case DT_PLTPADSZ
: name
= "PLTPADSZ"; break;
1134 case DT_MOVEENT
: name
= "MOVEENT"; break;
1135 case DT_MOVESZ
: name
= "MOVESZ"; break;
1136 case DT_FEATURE
: name
= "FEATURE"; break;
1137 case DT_POSFLAG_1
: name
= "POSFLAG_1"; break;
1138 case DT_SYMINSZ
: name
= "SYMINSZ"; break;
1139 case DT_SYMINENT
: name
= "SYMINENT"; break;
1140 case DT_CONFIG
: name
= "CONFIG"; stringp
= TRUE
; break;
1141 case DT_DEPAUDIT
: name
= "DEPAUDIT"; stringp
= TRUE
; break;
1142 case DT_AUDIT
: name
= "AUDIT"; stringp
= TRUE
; break;
1143 case DT_PLTPAD
: name
= "PLTPAD"; break;
1144 case DT_MOVETAB
: name
= "MOVETAB"; break;
1145 case DT_SYMINFO
: name
= "SYMINFO"; break;
1146 case DT_RELACOUNT
: name
= "RELACOUNT"; break;
1147 case DT_RELCOUNT
: name
= "RELCOUNT"; break;
1148 case DT_FLAGS_1
: name
= "FLAGS_1"; break;
1149 case DT_VERSYM
: name
= "VERSYM"; break;
1150 case DT_VERDEF
: name
= "VERDEF"; break;
1151 case DT_VERDEFNUM
: name
= "VERDEFNUM"; break;
1152 case DT_VERNEED
: name
= "VERNEED"; break;
1153 case DT_VERNEEDNUM
: name
= "VERNEEDNUM"; break;
1154 case DT_AUXILIARY
: name
= "AUXILIARY"; stringp
= TRUE
; break;
1155 case DT_USED
: name
= "USED"; break;
1156 case DT_FILTER
: name
= "FILTER"; stringp
= TRUE
; break;
1159 fprintf (f
, " %-11s ", name
);
1161 fprintf (f
, "0x%lx", (unsigned long) dyn
.d_un
.d_val
);
1165 unsigned int tagv
= dyn
.d_un
.d_val
;
1167 string
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
1170 fprintf (f
, "%s", string
);
1179 if ((elf_dynverdef (abfd
) != 0 && elf_tdata (abfd
)->verdef
== NULL
)
1180 || (elf_dynverref (abfd
) != 0 && elf_tdata (abfd
)->verref
== NULL
))
1182 if (! _bfd_elf_slurp_version_tables (abfd
, FALSE
))
1186 if (elf_dynverdef (abfd
) != 0)
1188 Elf_Internal_Verdef
*t
;
1190 fprintf (f
, _("\nVersion definitions:\n"));
1191 for (t
= elf_tdata (abfd
)->verdef
; t
!= NULL
; t
= t
->vd_nextdef
)
1193 fprintf (f
, "%d 0x%2.2x 0x%8.8lx %s\n", t
->vd_ndx
,
1194 t
->vd_flags
, t
->vd_hash
, t
->vd_nodename
);
1195 if (t
->vd_auxptr
->vda_nextptr
!= NULL
)
1197 Elf_Internal_Verdaux
*a
;
1200 for (a
= t
->vd_auxptr
->vda_nextptr
;
1203 fprintf (f
, "%s ", a
->vda_nodename
);
1209 if (elf_dynverref (abfd
) != 0)
1211 Elf_Internal_Verneed
*t
;
1213 fprintf (f
, _("\nVersion References:\n"));
1214 for (t
= elf_tdata (abfd
)->verref
; t
!= NULL
; t
= t
->vn_nextref
)
1216 Elf_Internal_Vernaux
*a
;
1218 fprintf (f
, _(" required from %s:\n"), t
->vn_filename
);
1219 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
1220 fprintf (f
, " 0x%8.8lx 0x%2.2x %2.2d %s\n", a
->vna_hash
,
1221 a
->vna_flags
, a
->vna_other
, a
->vna_nodename
);
1233 /* Display ELF-specific fields of a symbol. */
1236 bfd_elf_print_symbol (bfd
*abfd
,
1239 bfd_print_symbol_type how
)
1244 case bfd_print_symbol_name
:
1245 fprintf (file
, "%s", symbol
->name
);
1247 case bfd_print_symbol_more
:
1248 fprintf (file
, "elf ");
1249 bfd_fprintf_vma (abfd
, file
, symbol
->value
);
1250 fprintf (file
, " %lx", (long) symbol
->flags
);
1252 case bfd_print_symbol_all
:
1254 const char *section_name
;
1255 const char *name
= NULL
;
1256 const struct elf_backend_data
*bed
;
1257 unsigned char st_other
;
1260 section_name
= symbol
->section
? symbol
->section
->name
: "(*none*)";
1262 bed
= get_elf_backend_data (abfd
);
1263 if (bed
->elf_backend_print_symbol_all
)
1264 name
= (*bed
->elf_backend_print_symbol_all
) (abfd
, filep
, symbol
);
1268 name
= symbol
->name
;
1269 bfd_print_symbol_vandf (abfd
, file
, symbol
);
1272 fprintf (file
, " %s\t", section_name
);
1273 /* Print the "other" value for a symbol. For common symbols,
1274 we've already printed the size; now print the alignment.
1275 For other symbols, we have no specified alignment, and
1276 we've printed the address; now print the size. */
1277 if (bfd_is_com_section (symbol
->section
))
1278 val
= ((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_value
;
1280 val
= ((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_size
;
1281 bfd_fprintf_vma (abfd
, file
, val
);
1283 /* If we have version information, print it. */
1284 if (elf_tdata (abfd
)->dynversym_section
!= 0
1285 && (elf_tdata (abfd
)->dynverdef_section
!= 0
1286 || elf_tdata (abfd
)->dynverref_section
!= 0))
1288 unsigned int vernum
;
1289 const char *version_string
;
1291 vernum
= ((elf_symbol_type
*) symbol
)->version
& VERSYM_VERSION
;
1294 version_string
= "";
1295 else if (vernum
== 1)
1296 version_string
= "Base";
1297 else if (vernum
<= elf_tdata (abfd
)->cverdefs
)
1299 elf_tdata (abfd
)->verdef
[vernum
- 1].vd_nodename
;
1302 Elf_Internal_Verneed
*t
;
1304 version_string
= "";
1305 for (t
= elf_tdata (abfd
)->verref
;
1309 Elf_Internal_Vernaux
*a
;
1311 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
1313 if (a
->vna_other
== vernum
)
1315 version_string
= a
->vna_nodename
;
1322 if ((((elf_symbol_type
*) symbol
)->version
& VERSYM_HIDDEN
) == 0)
1323 fprintf (file
, " %-11s", version_string
);
1328 fprintf (file
, " (%s)", version_string
);
1329 for (i
= 10 - strlen (version_string
); i
> 0; --i
)
1334 /* If the st_other field is not zero, print it. */
1335 st_other
= ((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_other
;
1340 case STV_INTERNAL
: fprintf (file
, " .internal"); break;
1341 case STV_HIDDEN
: fprintf (file
, " .hidden"); break;
1342 case STV_PROTECTED
: fprintf (file
, " .protected"); break;
1344 /* Some other non-defined flags are also present, so print
1346 fprintf (file
, " 0x%02x", (unsigned int) st_other
);
1349 fprintf (file
, " %s", name
);
1355 /* Create an entry in an ELF linker hash table. */
1357 struct bfd_hash_entry
*
1358 _bfd_elf_link_hash_newfunc (struct bfd_hash_entry
*entry
,
1359 struct bfd_hash_table
*table
,
1362 /* Allocate the structure if it has not already been allocated by a
1366 entry
= bfd_hash_allocate (table
, sizeof (struct elf_link_hash_entry
));
1371 /* Call the allocation method of the superclass. */
1372 entry
= _bfd_link_hash_newfunc (entry
, table
, string
);
1375 struct elf_link_hash_entry
*ret
= (struct elf_link_hash_entry
*) entry
;
1376 struct elf_link_hash_table
*htab
= (struct elf_link_hash_table
*) table
;
1378 /* Set local fields. */
1381 ret
->got
= ret
->plt
= htab
->init_refcount
;
1382 memset (&ret
->size
, 0, (sizeof (struct elf_link_hash_entry
)
1383 - offsetof (struct elf_link_hash_entry
, size
)));
1384 /* Assume that we have been called by a non-ELF symbol reader.
1385 This flag is then reset by the code which reads an ELF input
1386 file. This ensures that a symbol created by a non-ELF symbol
1387 reader will have the flag set correctly. */
1394 /* Copy data from an indirect symbol to its direct symbol, hiding the
1395 old indirect symbol. Also used for copying flags to a weakdef. */
1398 _bfd_elf_link_hash_copy_indirect (const struct elf_backend_data
*bed
,
1399 struct elf_link_hash_entry
*dir
,
1400 struct elf_link_hash_entry
*ind
)
1403 bfd_signed_vma lowest_valid
= bed
->can_refcount
;
1405 /* Copy down any references that we may have already seen to the
1406 symbol which just became indirect. */
1408 dir
->ref_dynamic
|= ind
->ref_dynamic
;
1409 dir
->ref_regular
|= ind
->ref_regular
;
1410 dir
->ref_regular_nonweak
|= ind
->ref_regular_nonweak
;
1411 dir
->non_got_ref
|= ind
->non_got_ref
;
1412 dir
->needs_plt
|= ind
->needs_plt
;
1413 dir
->pointer_equality_needed
|= ind
->pointer_equality_needed
;
1415 if (ind
->root
.type
!= bfd_link_hash_indirect
)
1418 /* Copy over the global and procedure linkage table refcount entries.
1419 These may have been already set up by a check_relocs routine. */
1420 tmp
= dir
->got
.refcount
;
1421 if (tmp
< lowest_valid
)
1423 dir
->got
.refcount
= ind
->got
.refcount
;
1424 ind
->got
.refcount
= tmp
;
1427 BFD_ASSERT (ind
->got
.refcount
< lowest_valid
);
1429 tmp
= dir
->plt
.refcount
;
1430 if (tmp
< lowest_valid
)
1432 dir
->plt
.refcount
= ind
->plt
.refcount
;
1433 ind
->plt
.refcount
= tmp
;
1436 BFD_ASSERT (ind
->plt
.refcount
< lowest_valid
);
1438 if (dir
->dynindx
== -1)
1440 dir
->dynindx
= ind
->dynindx
;
1441 dir
->dynstr_index
= ind
->dynstr_index
;
1443 ind
->dynstr_index
= 0;
1446 BFD_ASSERT (ind
->dynindx
== -1);
1450 _bfd_elf_link_hash_hide_symbol (struct bfd_link_info
*info
,
1451 struct elf_link_hash_entry
*h
,
1452 bfd_boolean force_local
)
1454 h
->plt
= elf_hash_table (info
)->init_offset
;
1458 h
->forced_local
= 1;
1459 if (h
->dynindx
!= -1)
1462 _bfd_elf_strtab_delref (elf_hash_table (info
)->dynstr
,
1468 /* Initialize an ELF linker hash table. */
1471 _bfd_elf_link_hash_table_init
1472 (struct elf_link_hash_table
*table
,
1474 struct bfd_hash_entry
*(*newfunc
) (struct bfd_hash_entry
*,
1475 struct bfd_hash_table
*,
1480 table
->dynamic_sections_created
= FALSE
;
1481 table
->dynobj
= NULL
;
1482 /* Make sure can_refcount is extended to the width and signedness of
1483 init_refcount before we subtract one from it. */
1484 table
->init_refcount
.refcount
= get_elf_backend_data (abfd
)->can_refcount
;
1485 table
->init_refcount
.refcount
-= 1;
1486 table
->init_offset
.offset
= -(bfd_vma
) 1;
1487 /* The first dynamic symbol is a dummy. */
1488 table
->dynsymcount
= 1;
1489 table
->dynstr
= NULL
;
1490 table
->bucketcount
= 0;
1491 table
->needed
= NULL
;
1493 table
->merge_info
= NULL
;
1494 memset (&table
->stab_info
, 0, sizeof (table
->stab_info
));
1495 memset (&table
->eh_info
, 0, sizeof (table
->eh_info
));
1496 table
->dynlocal
= NULL
;
1497 table
->runpath
= NULL
;
1498 table
->tls_sec
= NULL
;
1499 table
->tls_size
= 0;
1500 table
->loaded
= NULL
;
1501 table
->is_relocatable_executable
= FALSE
;
1503 ret
= _bfd_link_hash_table_init (&table
->root
, abfd
, newfunc
);
1504 table
->root
.type
= bfd_link_elf_hash_table
;
1509 /* Create an ELF linker hash table. */
1511 struct bfd_link_hash_table
*
1512 _bfd_elf_link_hash_table_create (bfd
*abfd
)
1514 struct elf_link_hash_table
*ret
;
1515 bfd_size_type amt
= sizeof (struct elf_link_hash_table
);
1517 ret
= bfd_malloc (amt
);
1521 if (! _bfd_elf_link_hash_table_init (ret
, abfd
, _bfd_elf_link_hash_newfunc
))
1530 /* This is a hook for the ELF emulation code in the generic linker to
1531 tell the backend linker what file name to use for the DT_NEEDED
1532 entry for a dynamic object. */
1535 bfd_elf_set_dt_needed_name (bfd
*abfd
, const char *name
)
1537 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1538 && bfd_get_format (abfd
) == bfd_object
)
1539 elf_dt_name (abfd
) = name
;
1543 bfd_elf_get_dyn_lib_class (bfd
*abfd
)
1546 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1547 && bfd_get_format (abfd
) == bfd_object
)
1548 lib_class
= elf_dyn_lib_class (abfd
);
1555 bfd_elf_set_dyn_lib_class (bfd
*abfd
, int lib_class
)
1557 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1558 && bfd_get_format (abfd
) == bfd_object
)
1559 elf_dyn_lib_class (abfd
) = lib_class
;
1562 /* Get the list of DT_NEEDED entries for a link. This is a hook for
1563 the linker ELF emulation code. */
1565 struct bfd_link_needed_list
*
1566 bfd_elf_get_needed_list (bfd
*abfd ATTRIBUTE_UNUSED
,
1567 struct bfd_link_info
*info
)
1569 if (! is_elf_hash_table (info
->hash
))
1571 return elf_hash_table (info
)->needed
;
1574 /* Get the list of DT_RPATH/DT_RUNPATH entries for a link. This is a
1575 hook for the linker ELF emulation code. */
1577 struct bfd_link_needed_list
*
1578 bfd_elf_get_runpath_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
)->runpath
;
1586 /* Get the name actually used for a dynamic object for a link. This
1587 is the SONAME entry if there is one. Otherwise, it is the string
1588 passed to bfd_elf_set_dt_needed_name, or it is the filename. */
1591 bfd_elf_get_dt_soname (bfd
*abfd
)
1593 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1594 && bfd_get_format (abfd
) == bfd_object
)
1595 return elf_dt_name (abfd
);
1599 /* Get the list of DT_NEEDED entries from a BFD. This is a hook for
1600 the ELF linker emulation code. */
1603 bfd_elf_get_bfd_needed_list (bfd
*abfd
,
1604 struct bfd_link_needed_list
**pneeded
)
1607 bfd_byte
*dynbuf
= NULL
;
1609 unsigned long shlink
;
1610 bfd_byte
*extdyn
, *extdynend
;
1612 void (*swap_dyn_in
) (bfd
*, const void *, Elf_Internal_Dyn
*);
1616 if (bfd_get_flavour (abfd
) != bfd_target_elf_flavour
1617 || bfd_get_format (abfd
) != bfd_object
)
1620 s
= bfd_get_section_by_name (abfd
, ".dynamic");
1621 if (s
== NULL
|| s
->size
== 0)
1624 if (!bfd_malloc_and_get_section (abfd
, s
, &dynbuf
))
1627 elfsec
= _bfd_elf_section_from_bfd_section (abfd
, s
);
1631 shlink
= elf_elfsections (abfd
)[elfsec
]->sh_link
;
1633 extdynsize
= get_elf_backend_data (abfd
)->s
->sizeof_dyn
;
1634 swap_dyn_in
= get_elf_backend_data (abfd
)->s
->swap_dyn_in
;
1637 extdynend
= extdyn
+ s
->size
;
1638 for (; extdyn
< extdynend
; extdyn
+= extdynsize
)
1640 Elf_Internal_Dyn dyn
;
1642 (*swap_dyn_in
) (abfd
, extdyn
, &dyn
);
1644 if (dyn
.d_tag
== DT_NULL
)
1647 if (dyn
.d_tag
== DT_NEEDED
)
1650 struct bfd_link_needed_list
*l
;
1651 unsigned int tagv
= dyn
.d_un
.d_val
;
1654 string
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
1659 l
= bfd_alloc (abfd
, amt
);
1680 /* Allocate an ELF string table--force the first byte to be zero. */
1682 struct bfd_strtab_hash
*
1683 _bfd_elf_stringtab_init (void)
1685 struct bfd_strtab_hash
*ret
;
1687 ret
= _bfd_stringtab_init ();
1692 loc
= _bfd_stringtab_add (ret
, "", TRUE
, FALSE
);
1693 BFD_ASSERT (loc
== 0 || loc
== (bfd_size_type
) -1);
1694 if (loc
== (bfd_size_type
) -1)
1696 _bfd_stringtab_free (ret
);
1703 /* ELF .o/exec file reading */
1705 /* Create a new bfd section from an ELF section header. */
1708 bfd_section_from_shdr (bfd
*abfd
, unsigned int shindex
)
1710 Elf_Internal_Shdr
*hdr
= elf_elfsections (abfd
)[shindex
];
1711 Elf_Internal_Ehdr
*ehdr
= elf_elfheader (abfd
);
1712 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
1715 name
= bfd_elf_string_from_elf_section (abfd
,
1716 elf_elfheader (abfd
)->e_shstrndx
,
1719 switch (hdr
->sh_type
)
1722 /* Inactive section. Throw it away. */
1725 case SHT_PROGBITS
: /* Normal section with contents. */
1726 case SHT_NOBITS
: /* .bss section. */
1727 case SHT_HASH
: /* .hash section. */
1728 case SHT_NOTE
: /* .note section. */
1729 case SHT_INIT_ARRAY
: /* .init_array section. */
1730 case SHT_FINI_ARRAY
: /* .fini_array section. */
1731 case SHT_PREINIT_ARRAY
: /* .preinit_array section. */
1732 case SHT_GNU_LIBLIST
: /* .gnu.liblist section. */
1733 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
);
1735 case SHT_DYNAMIC
: /* Dynamic linking information. */
1736 if (! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
))
1738 if (elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_STRTAB
)
1740 Elf_Internal_Shdr
*dynsymhdr
;
1742 /* The shared libraries distributed with hpux11 have a bogus
1743 sh_link field for the ".dynamic" section. Find the
1744 string table for the ".dynsym" section instead. */
1745 if (elf_dynsymtab (abfd
) != 0)
1747 dynsymhdr
= elf_elfsections (abfd
)[elf_dynsymtab (abfd
)];
1748 hdr
->sh_link
= dynsymhdr
->sh_link
;
1752 unsigned int i
, num_sec
;
1754 num_sec
= elf_numsections (abfd
);
1755 for (i
= 1; i
< num_sec
; i
++)
1757 dynsymhdr
= elf_elfsections (abfd
)[i
];
1758 if (dynsymhdr
->sh_type
== SHT_DYNSYM
)
1760 hdr
->sh_link
= dynsymhdr
->sh_link
;
1768 case SHT_SYMTAB
: /* A symbol table */
1769 if (elf_onesymtab (abfd
) == shindex
)
1772 BFD_ASSERT (hdr
->sh_entsize
== bed
->s
->sizeof_sym
);
1773 BFD_ASSERT (elf_onesymtab (abfd
) == 0);
1774 elf_onesymtab (abfd
) = shindex
;
1775 elf_tdata (abfd
)->symtab_hdr
= *hdr
;
1776 elf_elfsections (abfd
)[shindex
] = hdr
= &elf_tdata (abfd
)->symtab_hdr
;
1777 abfd
->flags
|= HAS_SYMS
;
1779 /* Sometimes a shared object will map in the symbol table. If
1780 SHF_ALLOC is set, and this is a shared object, then we also
1781 treat this section as a BFD section. We can not base the
1782 decision purely on SHF_ALLOC, because that flag is sometimes
1783 set in a relocatable object file, which would confuse the
1785 if ((hdr
->sh_flags
& SHF_ALLOC
) != 0
1786 && (abfd
->flags
& DYNAMIC
) != 0
1787 && ! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
,
1791 /* Go looking for SHT_SYMTAB_SHNDX too, since if there is one we
1792 can't read symbols without that section loaded as well. It
1793 is most likely specified by the next section header. */
1794 if (elf_elfsections (abfd
)[elf_symtab_shndx (abfd
)]->sh_link
!= shindex
)
1796 unsigned int i
, num_sec
;
1798 num_sec
= elf_numsections (abfd
);
1799 for (i
= shindex
+ 1; i
< num_sec
; i
++)
1801 Elf_Internal_Shdr
*hdr2
= elf_elfsections (abfd
)[i
];
1802 if (hdr2
->sh_type
== SHT_SYMTAB_SHNDX
1803 && hdr2
->sh_link
== shindex
)
1807 for (i
= 1; i
< shindex
; i
++)
1809 Elf_Internal_Shdr
*hdr2
= elf_elfsections (abfd
)[i
];
1810 if (hdr2
->sh_type
== SHT_SYMTAB_SHNDX
1811 && hdr2
->sh_link
== shindex
)
1815 return bfd_section_from_shdr (abfd
, i
);
1819 case SHT_DYNSYM
: /* A dynamic symbol table */
1820 if (elf_dynsymtab (abfd
) == shindex
)
1823 BFD_ASSERT (hdr
->sh_entsize
== bed
->s
->sizeof_sym
);
1824 BFD_ASSERT (elf_dynsymtab (abfd
) == 0);
1825 elf_dynsymtab (abfd
) = shindex
;
1826 elf_tdata (abfd
)->dynsymtab_hdr
= *hdr
;
1827 elf_elfsections (abfd
)[shindex
] = hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
1828 abfd
->flags
|= HAS_SYMS
;
1830 /* Besides being a symbol table, we also treat this as a regular
1831 section, so that objcopy can handle it. */
1832 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
);
1834 case SHT_SYMTAB_SHNDX
: /* Symbol section indices when >64k sections */
1835 if (elf_symtab_shndx (abfd
) == shindex
)
1838 BFD_ASSERT (elf_symtab_shndx (abfd
) == 0);
1839 elf_symtab_shndx (abfd
) = shindex
;
1840 elf_tdata (abfd
)->symtab_shndx_hdr
= *hdr
;
1841 elf_elfsections (abfd
)[shindex
] = &elf_tdata (abfd
)->symtab_shndx_hdr
;
1844 case SHT_STRTAB
: /* A string table */
1845 if (hdr
->bfd_section
!= NULL
)
1847 if (ehdr
->e_shstrndx
== shindex
)
1849 elf_tdata (abfd
)->shstrtab_hdr
= *hdr
;
1850 elf_elfsections (abfd
)[shindex
] = &elf_tdata (abfd
)->shstrtab_hdr
;
1853 if (elf_elfsections (abfd
)[elf_onesymtab (abfd
)]->sh_link
== shindex
)
1856 elf_tdata (abfd
)->strtab_hdr
= *hdr
;
1857 elf_elfsections (abfd
)[shindex
] = &elf_tdata (abfd
)->strtab_hdr
;
1860 if (elf_elfsections (abfd
)[elf_dynsymtab (abfd
)]->sh_link
== shindex
)
1863 elf_tdata (abfd
)->dynstrtab_hdr
= *hdr
;
1864 hdr
= &elf_tdata (abfd
)->dynstrtab_hdr
;
1865 elf_elfsections (abfd
)[shindex
] = hdr
;
1866 /* We also treat this as a regular section, so that objcopy
1868 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
,
1872 /* If the string table isn't one of the above, then treat it as a
1873 regular section. We need to scan all the headers to be sure,
1874 just in case this strtab section appeared before the above. */
1875 if (elf_onesymtab (abfd
) == 0 || elf_dynsymtab (abfd
) == 0)
1877 unsigned int i
, num_sec
;
1879 num_sec
= elf_numsections (abfd
);
1880 for (i
= 1; i
< num_sec
; i
++)
1882 Elf_Internal_Shdr
*hdr2
= elf_elfsections (abfd
)[i
];
1883 if (hdr2
->sh_link
== shindex
)
1885 if (! bfd_section_from_shdr (abfd
, i
))
1887 if (elf_onesymtab (abfd
) == i
)
1889 if (elf_dynsymtab (abfd
) == i
)
1890 goto dynsymtab_strtab
;
1894 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
);
1898 /* *These* do a lot of work -- but build no sections! */
1900 asection
*target_sect
;
1901 Elf_Internal_Shdr
*hdr2
;
1902 unsigned int num_sec
= elf_numsections (abfd
);
1904 /* Check for a bogus link to avoid crashing. */
1905 if ((hdr
->sh_link
>= SHN_LORESERVE
&& hdr
->sh_link
<= SHN_HIRESERVE
)
1906 || hdr
->sh_link
>= num_sec
)
1908 ((*_bfd_error_handler
)
1909 (_("%B: invalid link %lu for reloc section %s (index %u)"),
1910 abfd
, hdr
->sh_link
, name
, shindex
));
1911 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
,
1915 /* For some incomprehensible reason Oracle distributes
1916 libraries for Solaris in which some of the objects have
1917 bogus sh_link fields. It would be nice if we could just
1918 reject them, but, unfortunately, some people need to use
1919 them. We scan through the section headers; if we find only
1920 one suitable symbol table, we clobber the sh_link to point
1921 to it. I hope this doesn't break anything. */
1922 if (elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_SYMTAB
1923 && elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_DYNSYM
)
1929 for (scan
= 1; scan
< num_sec
; scan
++)
1931 if (elf_elfsections (abfd
)[scan
]->sh_type
== SHT_SYMTAB
1932 || elf_elfsections (abfd
)[scan
]->sh_type
== SHT_DYNSYM
)
1943 hdr
->sh_link
= found
;
1946 /* Get the symbol table. */
1947 if ((elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
== SHT_SYMTAB
1948 || elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
== SHT_DYNSYM
)
1949 && ! bfd_section_from_shdr (abfd
, hdr
->sh_link
))
1952 /* If this reloc section does not use the main symbol table we
1953 don't treat it as a reloc section. BFD can't adequately
1954 represent such a section, so at least for now, we don't
1955 try. We just present it as a normal section. We also
1956 can't use it as a reloc section if it points to the null
1958 if (hdr
->sh_link
!= elf_onesymtab (abfd
) || hdr
->sh_info
== SHN_UNDEF
)
1959 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
,
1962 if (! bfd_section_from_shdr (abfd
, hdr
->sh_info
))
1964 target_sect
= bfd_section_from_elf_index (abfd
, hdr
->sh_info
);
1965 if (target_sect
== NULL
)
1968 if ((target_sect
->flags
& SEC_RELOC
) == 0
1969 || target_sect
->reloc_count
== 0)
1970 hdr2
= &elf_section_data (target_sect
)->rel_hdr
;
1974 BFD_ASSERT (elf_section_data (target_sect
)->rel_hdr2
== NULL
);
1975 amt
= sizeof (*hdr2
);
1976 hdr2
= bfd_alloc (abfd
, amt
);
1977 elf_section_data (target_sect
)->rel_hdr2
= hdr2
;
1980 elf_elfsections (abfd
)[shindex
] = hdr2
;
1981 target_sect
->reloc_count
+= NUM_SHDR_ENTRIES (hdr
);
1982 target_sect
->flags
|= SEC_RELOC
;
1983 target_sect
->relocation
= NULL
;
1984 target_sect
->rel_filepos
= hdr
->sh_offset
;
1985 /* In the section to which the relocations apply, mark whether
1986 its relocations are of the REL or RELA variety. */
1987 if (hdr
->sh_size
!= 0)
1988 target_sect
->use_rela_p
= hdr
->sh_type
== SHT_RELA
;
1989 abfd
->flags
|= HAS_RELOC
;
1994 case SHT_GNU_verdef
:
1995 elf_dynverdef (abfd
) = shindex
;
1996 elf_tdata (abfd
)->dynverdef_hdr
= *hdr
;
1997 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
);
2000 case SHT_GNU_versym
:
2001 elf_dynversym (abfd
) = shindex
;
2002 elf_tdata (abfd
)->dynversym_hdr
= *hdr
;
2003 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
);
2006 case SHT_GNU_verneed
:
2007 elf_dynverref (abfd
) = shindex
;
2008 elf_tdata (abfd
)->dynverref_hdr
= *hdr
;
2009 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
);
2016 /* We need a BFD section for objcopy and relocatable linking,
2017 and it's handy to have the signature available as the section
2019 name
= group_signature (abfd
, hdr
);
2022 if (!_bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
))
2024 if (hdr
->contents
!= NULL
)
2026 Elf_Internal_Group
*idx
= (Elf_Internal_Group
*) hdr
->contents
;
2027 unsigned int n_elt
= hdr
->sh_size
/ 4;
2030 if (idx
->flags
& GRP_COMDAT
)
2031 hdr
->bfd_section
->flags
2032 |= SEC_LINK_ONCE
| SEC_LINK_DUPLICATES_DISCARD
;
2034 /* We try to keep the same section order as it comes in. */
2036 while (--n_elt
!= 0)
2037 if ((s
= (--idx
)->shdr
->bfd_section
) != NULL
2038 && elf_next_in_group (s
) != NULL
)
2040 elf_next_in_group (hdr
->bfd_section
) = s
;
2047 /* Check for any processor-specific section types. */
2048 return bed
->elf_backend_section_from_shdr (abfd
, hdr
, name
,
2055 /* Return the section for the local symbol specified by ABFD, R_SYMNDX.
2056 Return SEC for sections that have no elf section, and NULL on error. */
2059 bfd_section_from_r_symndx (bfd
*abfd
,
2060 struct sym_sec_cache
*cache
,
2062 unsigned long r_symndx
)
2064 Elf_Internal_Shdr
*symtab_hdr
;
2065 unsigned char esym
[sizeof (Elf64_External_Sym
)];
2066 Elf_External_Sym_Shndx eshndx
;
2067 Elf_Internal_Sym isym
;
2068 unsigned int ent
= r_symndx
% LOCAL_SYM_CACHE_SIZE
;
2070 if (cache
->abfd
== abfd
&& cache
->indx
[ent
] == r_symndx
)
2071 return cache
->sec
[ent
];
2073 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2074 if (bfd_elf_get_elf_syms (abfd
, symtab_hdr
, 1, r_symndx
,
2075 &isym
, esym
, &eshndx
) == NULL
)
2078 if (cache
->abfd
!= abfd
)
2080 memset (cache
->indx
, -1, sizeof (cache
->indx
));
2083 cache
->indx
[ent
] = r_symndx
;
2084 cache
->sec
[ent
] = sec
;
2085 if ((isym
.st_shndx
!= SHN_UNDEF
&& isym
.st_shndx
< SHN_LORESERVE
)
2086 || isym
.st_shndx
> SHN_HIRESERVE
)
2089 s
= bfd_section_from_elf_index (abfd
, isym
.st_shndx
);
2091 cache
->sec
[ent
] = s
;
2093 return cache
->sec
[ent
];
2096 /* Given an ELF section number, retrieve the corresponding BFD
2100 bfd_section_from_elf_index (bfd
*abfd
, unsigned int index
)
2102 if (index
>= elf_numsections (abfd
))
2104 return elf_elfsections (abfd
)[index
]->bfd_section
;
2107 static struct bfd_elf_special_section
const special_sections
[] =
2109 { ".bss", 4, -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
},
2110 { ".gnu.linkonce.b",15, -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
},
2111 { ".comment", 8, 0, SHT_PROGBITS
, 0 },
2112 { ".data", 5, -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
},
2113 { ".data1", 6, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
},
2114 { ".debug", 6, 0, SHT_PROGBITS
, 0 },
2115 { ".fini", 5, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
},
2116 { ".init", 5, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
},
2117 { ".line", 5, 0, SHT_PROGBITS
, 0 },
2118 { ".rodata", 7, -2, SHT_PROGBITS
, SHF_ALLOC
},
2119 { ".rodata1", 8, 0, SHT_PROGBITS
, SHF_ALLOC
},
2120 { ".tbss", 5, -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_TLS
},
2121 { ".tdata", 6, -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_TLS
},
2122 { ".text", 5, -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
},
2123 { ".init_array", 11, 0, SHT_INIT_ARRAY
, SHF_ALLOC
+ SHF_WRITE
},
2124 { ".fini_array", 11, 0, SHT_FINI_ARRAY
, SHF_ALLOC
+ SHF_WRITE
},
2125 { ".preinit_array", 14, 0, SHT_PREINIT_ARRAY
, SHF_ALLOC
+ SHF_WRITE
},
2126 { ".debug_line", 11, 0, SHT_PROGBITS
, 0 },
2127 { ".debug_info", 11, 0, SHT_PROGBITS
, 0 },
2128 { ".debug_abbrev", 13, 0, SHT_PROGBITS
, 0 },
2129 { ".debug_aranges", 14, 0, SHT_PROGBITS
, 0 },
2130 { ".dynamic", 8, 0, SHT_DYNAMIC
, SHF_ALLOC
},
2131 { ".dynstr", 7, 0, SHT_STRTAB
, SHF_ALLOC
},
2132 { ".dynsym", 7, 0, SHT_DYNSYM
, SHF_ALLOC
},
2133 { ".got", 4, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
},
2134 { ".hash", 5, 0, SHT_HASH
, SHF_ALLOC
},
2135 { ".interp", 7, 0, SHT_PROGBITS
, 0 },
2136 { ".plt", 4, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
},
2137 { ".shstrtab", 9, 0, SHT_STRTAB
, 0 },
2138 { ".strtab", 7, 0, SHT_STRTAB
, 0 },
2139 { ".symtab", 7, 0, SHT_SYMTAB
, 0 },
2140 { ".gnu.version", 12, 0, SHT_GNU_versym
, 0 },
2141 { ".gnu.version_d", 14, 0, SHT_GNU_verdef
, 0 },
2142 { ".gnu.version_r", 14, 0, SHT_GNU_verneed
, 0 },
2143 { ".note.GNU-stack",15, 0, SHT_PROGBITS
, 0 },
2144 { ".note", 5, -1, SHT_NOTE
, 0 },
2145 { ".rela", 5, -1, SHT_RELA
, 0 },
2146 { ".rel", 4, -1, SHT_REL
, 0 },
2147 { ".stabstr", 5, 3, SHT_STRTAB
, 0 },
2148 { ".gnu.liblist", 12, 0, SHT_GNU_LIBLIST
, SHF_ALLOC
},
2149 { ".gnu.conflict", 13, 0, SHT_RELA
, SHF_ALLOC
},
2150 { NULL
, 0, 0, 0, 0 }
2153 static const struct bfd_elf_special_section
*
2154 get_special_section (const char *name
,
2155 const struct bfd_elf_special_section
*special_sections
,
2159 int len
= strlen (name
);
2161 for (i
= 0; special_sections
[i
].prefix
!= NULL
; i
++)
2164 int prefix_len
= special_sections
[i
].prefix_length
;
2166 if (len
< prefix_len
)
2168 if (memcmp (name
, special_sections
[i
].prefix
, prefix_len
) != 0)
2171 suffix_len
= special_sections
[i
].suffix_length
;
2172 if (suffix_len
<= 0)
2174 if (name
[prefix_len
] != 0)
2176 if (suffix_len
== 0)
2178 if (name
[prefix_len
] != '.'
2179 && (suffix_len
== -2
2180 || (rela
&& special_sections
[i
].type
== SHT_REL
)))
2186 if (len
< prefix_len
+ suffix_len
)
2188 if (memcmp (name
+ len
- suffix_len
,
2189 special_sections
[i
].prefix
+ prefix_len
,
2193 return &special_sections
[i
];
2199 const struct bfd_elf_special_section
*
2200 _bfd_elf_get_sec_type_attr (bfd
*abfd
, const char *name
)
2202 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2203 const struct bfd_elf_special_section
*ssect
= NULL
;
2205 /* See if this is one of the special sections. */
2208 unsigned int rela
= bed
->default_use_rela_p
;
2210 if (bed
->special_sections
)
2211 ssect
= get_special_section (name
, bed
->special_sections
, rela
);
2214 ssect
= get_special_section (name
, special_sections
, rela
);
2221 _bfd_elf_new_section_hook (bfd
*abfd
, asection
*sec
)
2223 struct bfd_elf_section_data
*sdata
;
2224 const struct bfd_elf_special_section
*ssect
;
2226 sdata
= (struct bfd_elf_section_data
*) sec
->used_by_bfd
;
2229 sdata
= bfd_zalloc (abfd
, sizeof (*sdata
));
2232 sec
->used_by_bfd
= sdata
;
2235 elf_section_type (sec
) = SHT_NULL
;
2236 ssect
= _bfd_elf_get_sec_type_attr (abfd
, sec
->name
);
2239 elf_section_type (sec
) = ssect
->type
;
2240 elf_section_flags (sec
) = ssect
->attr
;
2243 /* Indicate whether or not this section should use RELA relocations. */
2244 sec
->use_rela_p
= get_elf_backend_data (abfd
)->default_use_rela_p
;
2249 /* Create a new bfd section from an ELF program header.
2251 Since program segments have no names, we generate a synthetic name
2252 of the form segment<NUM>, where NUM is generally the index in the
2253 program header table. For segments that are split (see below) we
2254 generate the names segment<NUM>a and segment<NUM>b.
2256 Note that some program segments may have a file size that is different than
2257 (less than) the memory size. All this means is that at execution the
2258 system must allocate the amount of memory specified by the memory size,
2259 but only initialize it with the first "file size" bytes read from the
2260 file. This would occur for example, with program segments consisting
2261 of combined data+bss.
2263 To handle the above situation, this routine generates TWO bfd sections
2264 for the single program segment. The first has the length specified by
2265 the file size of the segment, and the second has the length specified
2266 by the difference between the two sizes. In effect, the segment is split
2267 into it's initialized and uninitialized parts.
2272 _bfd_elf_make_section_from_phdr (bfd
*abfd
,
2273 Elf_Internal_Phdr
*hdr
,
2275 const char *typename
)
2283 split
= ((hdr
->p_memsz
> 0)
2284 && (hdr
->p_filesz
> 0)
2285 && (hdr
->p_memsz
> hdr
->p_filesz
));
2286 sprintf (namebuf
, "%s%d%s", typename
, index
, split
? "a" : "");
2287 len
= strlen (namebuf
) + 1;
2288 name
= bfd_alloc (abfd
, len
);
2291 memcpy (name
, namebuf
, len
);
2292 newsect
= bfd_make_section (abfd
, name
);
2293 if (newsect
== NULL
)
2295 newsect
->vma
= hdr
->p_vaddr
;
2296 newsect
->lma
= hdr
->p_paddr
;
2297 newsect
->size
= hdr
->p_filesz
;
2298 newsect
->filepos
= hdr
->p_offset
;
2299 newsect
->flags
|= SEC_HAS_CONTENTS
;
2300 newsect
->alignment_power
= bfd_log2 (hdr
->p_align
);
2301 if (hdr
->p_type
== PT_LOAD
)
2303 newsect
->flags
|= SEC_ALLOC
;
2304 newsect
->flags
|= SEC_LOAD
;
2305 if (hdr
->p_flags
& PF_X
)
2307 /* FIXME: all we known is that it has execute PERMISSION,
2309 newsect
->flags
|= SEC_CODE
;
2312 if (!(hdr
->p_flags
& PF_W
))
2314 newsect
->flags
|= SEC_READONLY
;
2319 sprintf (namebuf
, "%s%db", typename
, index
);
2320 len
= strlen (namebuf
) + 1;
2321 name
= bfd_alloc (abfd
, len
);
2324 memcpy (name
, namebuf
, len
);
2325 newsect
= bfd_make_section (abfd
, name
);
2326 if (newsect
== NULL
)
2328 newsect
->vma
= hdr
->p_vaddr
+ hdr
->p_filesz
;
2329 newsect
->lma
= hdr
->p_paddr
+ hdr
->p_filesz
;
2330 newsect
->size
= hdr
->p_memsz
- hdr
->p_filesz
;
2331 if (hdr
->p_type
== PT_LOAD
)
2333 newsect
->flags
|= SEC_ALLOC
;
2334 if (hdr
->p_flags
& PF_X
)
2335 newsect
->flags
|= SEC_CODE
;
2337 if (!(hdr
->p_flags
& PF_W
))
2338 newsect
->flags
|= SEC_READONLY
;
2345 bfd_section_from_phdr (bfd
*abfd
, Elf_Internal_Phdr
*hdr
, int index
)
2347 const struct elf_backend_data
*bed
;
2349 switch (hdr
->p_type
)
2352 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "null");
2355 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "load");
2358 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "dynamic");
2361 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "interp");
2364 if (! _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "note"))
2366 if (! elfcore_read_notes (abfd
, hdr
->p_offset
, hdr
->p_filesz
))
2371 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "shlib");
2374 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "phdr");
2376 case PT_GNU_EH_FRAME
:
2377 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
,
2381 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "stack");
2384 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "relro");
2387 /* Check for any processor-specific program segment types. */
2388 bed
= get_elf_backend_data (abfd
);
2389 return bed
->elf_backend_section_from_phdr (abfd
, hdr
, index
, "proc");
2393 /* Initialize REL_HDR, the section-header for new section, containing
2394 relocations against ASECT. If USE_RELA_P is TRUE, we use RELA
2395 relocations; otherwise, we use REL relocations. */
2398 _bfd_elf_init_reloc_shdr (bfd
*abfd
,
2399 Elf_Internal_Shdr
*rel_hdr
,
2401 bfd_boolean use_rela_p
)
2404 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2405 bfd_size_type amt
= sizeof ".rela" + strlen (asect
->name
);
2407 name
= bfd_alloc (abfd
, amt
);
2410 sprintf (name
, "%s%s", use_rela_p
? ".rela" : ".rel", asect
->name
);
2412 (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd
), name
,
2414 if (rel_hdr
->sh_name
== (unsigned int) -1)
2416 rel_hdr
->sh_type
= use_rela_p
? SHT_RELA
: SHT_REL
;
2417 rel_hdr
->sh_entsize
= (use_rela_p
2418 ? bed
->s
->sizeof_rela
2419 : bed
->s
->sizeof_rel
);
2420 rel_hdr
->sh_addralign
= 1 << bed
->s
->log_file_align
;
2421 rel_hdr
->sh_flags
= 0;
2422 rel_hdr
->sh_addr
= 0;
2423 rel_hdr
->sh_size
= 0;
2424 rel_hdr
->sh_offset
= 0;
2429 /* Set up an ELF internal section header for a section. */
2432 elf_fake_sections (bfd
*abfd
, asection
*asect
, void *failedptrarg
)
2434 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2435 bfd_boolean
*failedptr
= failedptrarg
;
2436 Elf_Internal_Shdr
*this_hdr
;
2440 /* We already failed; just get out of the bfd_map_over_sections
2445 this_hdr
= &elf_section_data (asect
)->this_hdr
;
2447 this_hdr
->sh_name
= (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd
),
2448 asect
->name
, FALSE
);
2449 if (this_hdr
->sh_name
== (unsigned int) -1)
2455 this_hdr
->sh_flags
= 0;
2457 if ((asect
->flags
& SEC_ALLOC
) != 0
2458 || asect
->user_set_vma
)
2459 this_hdr
->sh_addr
= asect
->vma
;
2461 this_hdr
->sh_addr
= 0;
2463 this_hdr
->sh_offset
= 0;
2464 this_hdr
->sh_size
= asect
->size
;
2465 this_hdr
->sh_link
= 0;
2466 this_hdr
->sh_addralign
= 1 << asect
->alignment_power
;
2467 /* The sh_entsize and sh_info fields may have been set already by
2468 copy_private_section_data. */
2470 this_hdr
->bfd_section
= asect
;
2471 this_hdr
->contents
= NULL
;
2473 /* If the section type is unspecified, we set it based on
2475 if (this_hdr
->sh_type
== SHT_NULL
)
2477 if ((asect
->flags
& SEC_GROUP
) != 0)
2479 /* We also need to mark SHF_GROUP here for relocatable
2481 struct bfd_link_order
*l
;
2484 for (l
= asect
->link_order_head
; l
!= NULL
; l
= l
->next
)
2485 if (l
->type
== bfd_indirect_link_order
2486 && (elt
= elf_next_in_group (l
->u
.indirect
.section
)) != NULL
)
2489 /* The name is not important. Anything will do. */
2490 elf_group_name (elt
->output_section
) = "G";
2491 elf_section_flags (elt
->output_section
) |= SHF_GROUP
;
2493 elt
= elf_next_in_group (elt
);
2494 /* During a relocatable link, the lists are
2497 while (elt
!= elf_next_in_group (l
->u
.indirect
.section
));
2499 this_hdr
->sh_type
= SHT_GROUP
;
2501 else if ((asect
->flags
& SEC_ALLOC
) != 0
2502 && (((asect
->flags
& (SEC_LOAD
| SEC_HAS_CONTENTS
)) == 0)
2503 || (asect
->flags
& SEC_NEVER_LOAD
) != 0))
2504 this_hdr
->sh_type
= SHT_NOBITS
;
2506 this_hdr
->sh_type
= SHT_PROGBITS
;
2509 switch (this_hdr
->sh_type
)
2515 case SHT_INIT_ARRAY
:
2516 case SHT_FINI_ARRAY
:
2517 case SHT_PREINIT_ARRAY
:
2524 this_hdr
->sh_entsize
= bed
->s
->sizeof_hash_entry
;
2528 this_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
2532 this_hdr
->sh_entsize
= bed
->s
->sizeof_dyn
;
2536 if (get_elf_backend_data (abfd
)->may_use_rela_p
)
2537 this_hdr
->sh_entsize
= bed
->s
->sizeof_rela
;
2541 if (get_elf_backend_data (abfd
)->may_use_rel_p
)
2542 this_hdr
->sh_entsize
= bed
->s
->sizeof_rel
;
2545 case SHT_GNU_versym
:
2546 this_hdr
->sh_entsize
= sizeof (Elf_External_Versym
);
2549 case SHT_GNU_verdef
:
2550 this_hdr
->sh_entsize
= 0;
2551 /* objcopy or strip will copy over sh_info, but may not set
2552 cverdefs. The linker will set cverdefs, but sh_info will be
2554 if (this_hdr
->sh_info
== 0)
2555 this_hdr
->sh_info
= elf_tdata (abfd
)->cverdefs
;
2557 BFD_ASSERT (elf_tdata (abfd
)->cverdefs
== 0
2558 || this_hdr
->sh_info
== elf_tdata (abfd
)->cverdefs
);
2561 case SHT_GNU_verneed
:
2562 this_hdr
->sh_entsize
= 0;
2563 /* objcopy or strip will copy over sh_info, but may not set
2564 cverrefs. The linker will set cverrefs, but sh_info will be
2566 if (this_hdr
->sh_info
== 0)
2567 this_hdr
->sh_info
= elf_tdata (abfd
)->cverrefs
;
2569 BFD_ASSERT (elf_tdata (abfd
)->cverrefs
== 0
2570 || this_hdr
->sh_info
== elf_tdata (abfd
)->cverrefs
);
2574 this_hdr
->sh_entsize
= 4;
2578 if ((asect
->flags
& SEC_ALLOC
) != 0)
2579 this_hdr
->sh_flags
|= SHF_ALLOC
;
2580 if ((asect
->flags
& SEC_READONLY
) == 0)
2581 this_hdr
->sh_flags
|= SHF_WRITE
;
2582 if ((asect
->flags
& SEC_CODE
) != 0)
2583 this_hdr
->sh_flags
|= SHF_EXECINSTR
;
2584 if ((asect
->flags
& SEC_MERGE
) != 0)
2586 this_hdr
->sh_flags
|= SHF_MERGE
;
2587 this_hdr
->sh_entsize
= asect
->entsize
;
2588 if ((asect
->flags
& SEC_STRINGS
) != 0)
2589 this_hdr
->sh_flags
|= SHF_STRINGS
;
2591 if ((asect
->flags
& SEC_GROUP
) == 0 && elf_group_name (asect
) != NULL
)
2592 this_hdr
->sh_flags
|= SHF_GROUP
;
2593 if ((asect
->flags
& SEC_THREAD_LOCAL
) != 0)
2595 this_hdr
->sh_flags
|= SHF_TLS
;
2596 if (asect
->size
== 0 && (asect
->flags
& SEC_HAS_CONTENTS
) == 0)
2598 struct bfd_link_order
*o
;
2600 this_hdr
->sh_size
= 0;
2601 for (o
= asect
->link_order_head
; o
!= NULL
; o
= o
->next
)
2602 if (this_hdr
->sh_size
< o
->offset
+ o
->size
)
2603 this_hdr
->sh_size
= o
->offset
+ o
->size
;
2604 if (this_hdr
->sh_size
)
2605 this_hdr
->sh_type
= SHT_NOBITS
;
2609 /* Check for processor-specific section types. */
2610 if (bed
->elf_backend_fake_sections
2611 && !(*bed
->elf_backend_fake_sections
) (abfd
, this_hdr
, asect
))
2614 /* If the section has relocs, set up a section header for the
2615 SHT_REL[A] section. If two relocation sections are required for
2616 this section, it is up to the processor-specific back-end to
2617 create the other. */
2618 if ((asect
->flags
& SEC_RELOC
) != 0
2619 && !_bfd_elf_init_reloc_shdr (abfd
,
2620 &elf_section_data (asect
)->rel_hdr
,
2626 /* Fill in the contents of a SHT_GROUP section. */
2629 bfd_elf_set_group_contents (bfd
*abfd
, asection
*sec
, void *failedptrarg
)
2631 bfd_boolean
*failedptr
= failedptrarg
;
2632 unsigned long symindx
;
2633 asection
*elt
, *first
;
2635 struct bfd_link_order
*l
;
2638 if (elf_section_data (sec
)->this_hdr
.sh_type
!= SHT_GROUP
2643 if (elf_group_id (sec
) != NULL
)
2644 symindx
= elf_group_id (sec
)->udata
.i
;
2648 /* If called from the assembler, swap_out_syms will have set up
2649 elf_section_syms; If called for "ld -r", use target_index. */
2650 if (elf_section_syms (abfd
) != NULL
)
2651 symindx
= elf_section_syms (abfd
)[sec
->index
]->udata
.i
;
2653 symindx
= sec
->target_index
;
2655 elf_section_data (sec
)->this_hdr
.sh_info
= symindx
;
2657 /* The contents won't be allocated for "ld -r" or objcopy. */
2659 if (sec
->contents
== NULL
)
2662 sec
->contents
= bfd_alloc (abfd
, sec
->size
);
2664 /* Arrange for the section to be written out. */
2665 elf_section_data (sec
)->this_hdr
.contents
= sec
->contents
;
2666 if (sec
->contents
== NULL
)
2673 loc
= sec
->contents
+ sec
->size
;
2675 /* Get the pointer to the first section in the group that gas
2676 squirreled away here. objcopy arranges for this to be set to the
2677 start of the input section group. */
2678 first
= elt
= elf_next_in_group (sec
);
2680 /* First element is a flag word. Rest of section is elf section
2681 indices for all the sections of the group. Write them backwards
2682 just to keep the group in the same order as given in .section
2683 directives, not that it matters. */
2692 s
= s
->output_section
;
2695 idx
= elf_section_data (s
)->this_idx
;
2696 H_PUT_32 (abfd
, idx
, loc
);
2697 elt
= elf_next_in_group (elt
);
2702 /* If this is a relocatable link, then the above did nothing because
2703 SEC is the output section. Look through the input sections
2705 for (l
= sec
->link_order_head
; l
!= NULL
; l
= l
->next
)
2706 if (l
->type
== bfd_indirect_link_order
2707 && (elt
= elf_next_in_group (l
->u
.indirect
.section
)) != NULL
)
2712 elf_section_data (elt
->output_section
)->this_idx
, loc
);
2713 elt
= elf_next_in_group (elt
);
2714 /* During a relocatable link, the lists are circular. */
2716 while (elt
!= elf_next_in_group (l
->u
.indirect
.section
));
2718 if ((loc
-= 4) != sec
->contents
)
2721 H_PUT_32 (abfd
, sec
->flags
& SEC_LINK_ONCE
? GRP_COMDAT
: 0, loc
);
2724 /* Assign all ELF section numbers. The dummy first section is handled here
2725 too. The link/info pointers for the standard section types are filled
2726 in here too, while we're at it. */
2729 assign_section_numbers (bfd
*abfd
)
2731 struct elf_obj_tdata
*t
= elf_tdata (abfd
);
2733 unsigned int section_number
, secn
;
2734 Elf_Internal_Shdr
**i_shdrp
;
2736 struct bfd_elf_section_data
*d
;
2740 _bfd_elf_strtab_clear_all_refs (elf_shstrtab (abfd
));
2742 /* Put SHT_GROUP sections first. */
2743 for (sec
= abfd
->sections
; sec
; sec
= sec
->next
)
2745 d
= elf_section_data (sec
);
2747 if (d
->this_hdr
.sh_type
== SHT_GROUP
)
2749 if (section_number
== SHN_LORESERVE
)
2750 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2751 d
->this_idx
= section_number
++;
2755 for (sec
= abfd
->sections
; sec
; sec
= sec
->next
)
2757 d
= elf_section_data (sec
);
2759 if (d
->this_hdr
.sh_type
!= SHT_GROUP
)
2761 if (section_number
== SHN_LORESERVE
)
2762 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2763 d
->this_idx
= section_number
++;
2765 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->this_hdr
.sh_name
);
2766 if ((sec
->flags
& SEC_RELOC
) == 0)
2770 if (section_number
== SHN_LORESERVE
)
2771 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2772 d
->rel_idx
= section_number
++;
2773 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->rel_hdr
.sh_name
);
2778 if (section_number
== SHN_LORESERVE
)
2779 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2780 d
->rel_idx2
= section_number
++;
2781 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->rel_hdr2
->sh_name
);
2787 if (section_number
== SHN_LORESERVE
)
2788 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2789 t
->shstrtab_section
= section_number
++;
2790 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->shstrtab_hdr
.sh_name
);
2791 elf_elfheader (abfd
)->e_shstrndx
= t
->shstrtab_section
;
2793 if (bfd_get_symcount (abfd
) > 0)
2795 if (section_number
== SHN_LORESERVE
)
2796 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2797 t
->symtab_section
= section_number
++;
2798 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->symtab_hdr
.sh_name
);
2799 if (section_number
> SHN_LORESERVE
- 2)
2801 if (section_number
== SHN_LORESERVE
)
2802 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2803 t
->symtab_shndx_section
= section_number
++;
2804 t
->symtab_shndx_hdr
.sh_name
2805 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd
),
2806 ".symtab_shndx", FALSE
);
2807 if (t
->symtab_shndx_hdr
.sh_name
== (unsigned int) -1)
2810 if (section_number
== SHN_LORESERVE
)
2811 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2812 t
->strtab_section
= section_number
++;
2813 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->strtab_hdr
.sh_name
);
2816 _bfd_elf_strtab_finalize (elf_shstrtab (abfd
));
2817 t
->shstrtab_hdr
.sh_size
= _bfd_elf_strtab_size (elf_shstrtab (abfd
));
2819 elf_numsections (abfd
) = section_number
;
2820 elf_elfheader (abfd
)->e_shnum
= section_number
;
2821 if (section_number
> SHN_LORESERVE
)
2822 elf_elfheader (abfd
)->e_shnum
-= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2824 /* Set up the list of section header pointers, in agreement with the
2826 amt
= section_number
* sizeof (Elf_Internal_Shdr
*);
2827 i_shdrp
= bfd_zalloc (abfd
, amt
);
2828 if (i_shdrp
== NULL
)
2831 amt
= sizeof (Elf_Internal_Shdr
);
2832 i_shdrp
[0] = bfd_zalloc (abfd
, amt
);
2833 if (i_shdrp
[0] == NULL
)
2835 bfd_release (abfd
, i_shdrp
);
2839 elf_elfsections (abfd
) = i_shdrp
;
2841 i_shdrp
[t
->shstrtab_section
] = &t
->shstrtab_hdr
;
2842 if (bfd_get_symcount (abfd
) > 0)
2844 i_shdrp
[t
->symtab_section
] = &t
->symtab_hdr
;
2845 if (elf_numsections (abfd
) > SHN_LORESERVE
)
2847 i_shdrp
[t
->symtab_shndx_section
] = &t
->symtab_shndx_hdr
;
2848 t
->symtab_shndx_hdr
.sh_link
= t
->symtab_section
;
2850 i_shdrp
[t
->strtab_section
] = &t
->strtab_hdr
;
2851 t
->symtab_hdr
.sh_link
= t
->strtab_section
;
2854 for (sec
= abfd
->sections
; sec
; sec
= sec
->next
)
2856 struct bfd_elf_section_data
*d
= elf_section_data (sec
);
2860 i_shdrp
[d
->this_idx
] = &d
->this_hdr
;
2861 if (d
->rel_idx
!= 0)
2862 i_shdrp
[d
->rel_idx
] = &d
->rel_hdr
;
2863 if (d
->rel_idx2
!= 0)
2864 i_shdrp
[d
->rel_idx2
] = d
->rel_hdr2
;
2866 /* Fill in the sh_link and sh_info fields while we're at it. */
2868 /* sh_link of a reloc section is the section index of the symbol
2869 table. sh_info is the section index of the section to which
2870 the relocation entries apply. */
2871 if (d
->rel_idx
!= 0)
2873 d
->rel_hdr
.sh_link
= t
->symtab_section
;
2874 d
->rel_hdr
.sh_info
= d
->this_idx
;
2876 if (d
->rel_idx2
!= 0)
2878 d
->rel_hdr2
->sh_link
= t
->symtab_section
;
2879 d
->rel_hdr2
->sh_info
= d
->this_idx
;
2882 /* We need to set up sh_link for SHF_LINK_ORDER. */
2883 if ((d
->this_hdr
.sh_flags
& SHF_LINK_ORDER
) != 0)
2885 s
= elf_linked_to_section (sec
);
2887 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
2890 struct bfd_link_order
*p
;
2892 /* Find out what the corresponding section in output
2894 for (p
= sec
->link_order_head
; p
!= NULL
; p
= p
->next
)
2896 s
= p
->u
.indirect
.section
;
2897 if (p
->type
== bfd_indirect_link_order
2898 && (bfd_get_flavour (s
->owner
)
2899 == bfd_target_elf_flavour
))
2901 Elf_Internal_Shdr
** const elf_shdrp
2902 = elf_elfsections (s
->owner
);
2904 = _bfd_elf_section_from_bfd_section (s
->owner
, s
);
2905 elfsec
= elf_shdrp
[elfsec
]->sh_link
;
2907 The Intel C compiler generates SHT_IA_64_UNWIND with
2908 SHF_LINK_ORDER. But it doesn't set theh sh_link or
2909 sh_info fields. Hence we could get the situation
2910 where elfsec is 0. */
2913 const struct elf_backend_data
*bed
2914 = get_elf_backend_data (abfd
);
2915 if (bed
->link_order_error_handler
)
2916 bed
->link_order_error_handler
2917 (_("%B: warning: sh_link not set for section `%A'"),
2922 s
= elf_shdrp
[elfsec
]->bfd_section
;
2923 if (elf_discarded_section (s
))
2926 (*_bfd_error_handler
)
2927 (_("%B: sh_link of section `%A' points to discarded section `%A' of `%B'"),
2928 abfd
, d
->this_hdr
.bfd_section
,
2930 /* Point to the kept section if it has
2931 the same size as the discarded
2933 kept
= _bfd_elf_check_kept_section (s
);
2936 bfd_set_error (bfd_error_bad_value
);
2941 s
= s
->output_section
;
2942 BFD_ASSERT (s
!= NULL
);
2943 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
2951 switch (d
->this_hdr
.sh_type
)
2955 /* A reloc section which we are treating as a normal BFD
2956 section. sh_link is the section index of the symbol
2957 table. sh_info is the section index of the section to
2958 which the relocation entries apply. We assume that an
2959 allocated reloc section uses the dynamic symbol table.
2960 FIXME: How can we be sure? */
2961 s
= bfd_get_section_by_name (abfd
, ".dynsym");
2963 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
2965 /* We look up the section the relocs apply to by name. */
2967 if (d
->this_hdr
.sh_type
== SHT_REL
)
2971 s
= bfd_get_section_by_name (abfd
, name
);
2973 d
->this_hdr
.sh_info
= elf_section_data (s
)->this_idx
;
2977 /* We assume that a section named .stab*str is a stabs
2978 string section. We look for a section with the same name
2979 but without the trailing ``str'', and set its sh_link
2980 field to point to this section. */
2981 if (strncmp (sec
->name
, ".stab", sizeof ".stab" - 1) == 0
2982 && strcmp (sec
->name
+ strlen (sec
->name
) - 3, "str") == 0)
2987 len
= strlen (sec
->name
);
2988 alc
= bfd_malloc (len
- 2);
2991 memcpy (alc
, sec
->name
, len
- 3);
2992 alc
[len
- 3] = '\0';
2993 s
= bfd_get_section_by_name (abfd
, alc
);
2997 elf_section_data (s
)->this_hdr
.sh_link
= d
->this_idx
;
2999 /* This is a .stab section. */
3000 if (elf_section_data (s
)->this_hdr
.sh_entsize
== 0)
3001 elf_section_data (s
)->this_hdr
.sh_entsize
3002 = 4 + 2 * bfd_get_arch_size (abfd
) / 8;
3009 case SHT_GNU_verneed
:
3010 case SHT_GNU_verdef
:
3011 /* sh_link is the section header index of the string table
3012 used for the dynamic entries, or the symbol table, or the
3014 s
= bfd_get_section_by_name (abfd
, ".dynstr");
3016 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
3019 case SHT_GNU_LIBLIST
:
3020 /* sh_link is the section header index of the prelink library
3022 used for the dynamic entries, or the symbol table, or the
3024 s
= bfd_get_section_by_name (abfd
, (sec
->flags
& SEC_ALLOC
)
3025 ? ".dynstr" : ".gnu.libstr");
3027 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
3031 case SHT_GNU_versym
:
3032 /* sh_link is the section header index of the symbol table
3033 this hash table or version table is for. */
3034 s
= bfd_get_section_by_name (abfd
, ".dynsym");
3036 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
3040 d
->this_hdr
.sh_link
= t
->symtab_section
;
3044 for (secn
= 1; secn
< section_number
; ++secn
)
3045 if (i_shdrp
[secn
] == NULL
)
3046 i_shdrp
[secn
] = i_shdrp
[0];
3048 i_shdrp
[secn
]->sh_name
= _bfd_elf_strtab_offset (elf_shstrtab (abfd
),
3049 i_shdrp
[secn
]->sh_name
);
3053 /* Map symbol from it's internal number to the external number, moving
3054 all local symbols to be at the head of the list. */
3057 sym_is_global (bfd
*abfd
, asymbol
*sym
)
3059 /* If the backend has a special mapping, use it. */
3060 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3061 if (bed
->elf_backend_sym_is_global
)
3062 return (*bed
->elf_backend_sym_is_global
) (abfd
, sym
);
3064 return ((sym
->flags
& (BSF_GLOBAL
| BSF_WEAK
)) != 0
3065 || bfd_is_und_section (bfd_get_section (sym
))
3066 || bfd_is_com_section (bfd_get_section (sym
)));
3070 elf_map_symbols (bfd
*abfd
)
3072 unsigned int symcount
= bfd_get_symcount (abfd
);
3073 asymbol
**syms
= bfd_get_outsymbols (abfd
);
3074 asymbol
**sect_syms
;
3075 unsigned int num_locals
= 0;
3076 unsigned int num_globals
= 0;
3077 unsigned int num_locals2
= 0;
3078 unsigned int num_globals2
= 0;
3086 fprintf (stderr
, "elf_map_symbols\n");
3090 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
3092 if (max_index
< asect
->index
)
3093 max_index
= asect
->index
;
3097 amt
= max_index
* sizeof (asymbol
*);
3098 sect_syms
= bfd_zalloc (abfd
, amt
);
3099 if (sect_syms
== NULL
)
3101 elf_section_syms (abfd
) = sect_syms
;
3102 elf_num_section_syms (abfd
) = max_index
;
3104 /* Init sect_syms entries for any section symbols we have already
3105 decided to output. */
3106 for (idx
= 0; idx
< symcount
; idx
++)
3108 asymbol
*sym
= syms
[idx
];
3110 if ((sym
->flags
& BSF_SECTION_SYM
) != 0
3117 if (sec
->owner
!= NULL
)
3119 if (sec
->owner
!= abfd
)
3121 if (sec
->output_offset
!= 0)
3124 sec
= sec
->output_section
;
3126 /* Empty sections in the input files may have had a
3127 section symbol created for them. (See the comment
3128 near the end of _bfd_generic_link_output_symbols in
3129 linker.c). If the linker script discards such
3130 sections then we will reach this point. Since we know
3131 that we cannot avoid this case, we detect it and skip
3132 the abort and the assignment to the sect_syms array.
3133 To reproduce this particular case try running the
3134 linker testsuite test ld-scripts/weak.exp for an ELF
3135 port that uses the generic linker. */
3136 if (sec
->owner
== NULL
)
3139 BFD_ASSERT (sec
->owner
== abfd
);
3141 sect_syms
[sec
->index
] = syms
[idx
];
3146 /* Classify all of the symbols. */
3147 for (idx
= 0; idx
< symcount
; idx
++)
3149 if (!sym_is_global (abfd
, syms
[idx
]))
3155 /* We will be adding a section symbol for each BFD section. Most normal
3156 sections will already have a section symbol in outsymbols, but
3157 eg. SHT_GROUP sections will not, and we need the section symbol mapped
3158 at least in that case. */
3159 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
3161 if (sect_syms
[asect
->index
] == NULL
)
3163 if (!sym_is_global (abfd
, asect
->symbol
))
3170 /* Now sort the symbols so the local symbols are first. */
3171 amt
= (num_locals
+ num_globals
) * sizeof (asymbol
*);
3172 new_syms
= bfd_alloc (abfd
, amt
);
3174 if (new_syms
== NULL
)
3177 for (idx
= 0; idx
< symcount
; idx
++)
3179 asymbol
*sym
= syms
[idx
];
3182 if (!sym_is_global (abfd
, sym
))
3185 i
= num_locals
+ num_globals2
++;
3187 sym
->udata
.i
= i
+ 1;
3189 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
3191 if (sect_syms
[asect
->index
] == NULL
)
3193 asymbol
*sym
= asect
->symbol
;
3196 sect_syms
[asect
->index
] = sym
;
3197 if (!sym_is_global (abfd
, sym
))
3200 i
= num_locals
+ num_globals2
++;
3202 sym
->udata
.i
= i
+ 1;
3206 bfd_set_symtab (abfd
, new_syms
, num_locals
+ num_globals
);
3208 elf_num_locals (abfd
) = num_locals
;
3209 elf_num_globals (abfd
) = num_globals
;
3213 /* Align to the maximum file alignment that could be required for any
3214 ELF data structure. */
3216 static inline file_ptr
3217 align_file_position (file_ptr off
, int align
)
3219 return (off
+ align
- 1) & ~(align
- 1);
3222 /* Assign a file position to a section, optionally aligning to the
3223 required section alignment. */
3226 _bfd_elf_assign_file_position_for_section (Elf_Internal_Shdr
*i_shdrp
,
3234 al
= i_shdrp
->sh_addralign
;
3236 offset
= BFD_ALIGN (offset
, al
);
3238 i_shdrp
->sh_offset
= offset
;
3239 if (i_shdrp
->bfd_section
!= NULL
)
3240 i_shdrp
->bfd_section
->filepos
= offset
;
3241 if (i_shdrp
->sh_type
!= SHT_NOBITS
)
3242 offset
+= i_shdrp
->sh_size
;
3246 /* Compute the file positions we are going to put the sections at, and
3247 otherwise prepare to begin writing out the ELF file. If LINK_INFO
3248 is not NULL, this is being called by the ELF backend linker. */
3251 _bfd_elf_compute_section_file_positions (bfd
*abfd
,
3252 struct bfd_link_info
*link_info
)
3254 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3256 struct bfd_strtab_hash
*strtab
= NULL
;
3257 Elf_Internal_Shdr
*shstrtab_hdr
;
3259 if (abfd
->output_has_begun
)
3262 /* Do any elf backend specific processing first. */
3263 if (bed
->elf_backend_begin_write_processing
)
3264 (*bed
->elf_backend_begin_write_processing
) (abfd
, link_info
);
3266 if (! prep_headers (abfd
))
3269 /* Post process the headers if necessary. */
3270 if (bed
->elf_backend_post_process_headers
)
3271 (*bed
->elf_backend_post_process_headers
) (abfd
, link_info
);
3274 bfd_map_over_sections (abfd
, elf_fake_sections
, &failed
);
3278 if (!assign_section_numbers (abfd
))
3281 /* The backend linker builds symbol table information itself. */
3282 if (link_info
== NULL
&& bfd_get_symcount (abfd
) > 0)
3284 /* Non-zero if doing a relocatable link. */
3285 int relocatable_p
= ! (abfd
->flags
& (EXEC_P
| DYNAMIC
));
3287 if (! swap_out_syms (abfd
, &strtab
, relocatable_p
))
3291 if (link_info
== NULL
)
3293 bfd_map_over_sections (abfd
, bfd_elf_set_group_contents
, &failed
);
3298 shstrtab_hdr
= &elf_tdata (abfd
)->shstrtab_hdr
;
3299 /* sh_name was set in prep_headers. */
3300 shstrtab_hdr
->sh_type
= SHT_STRTAB
;
3301 shstrtab_hdr
->sh_flags
= 0;
3302 shstrtab_hdr
->sh_addr
= 0;
3303 shstrtab_hdr
->sh_size
= _bfd_elf_strtab_size (elf_shstrtab (abfd
));
3304 shstrtab_hdr
->sh_entsize
= 0;
3305 shstrtab_hdr
->sh_link
= 0;
3306 shstrtab_hdr
->sh_info
= 0;
3307 /* sh_offset is set in assign_file_positions_except_relocs. */
3308 shstrtab_hdr
->sh_addralign
= 1;
3310 if (!assign_file_positions_except_relocs (abfd
, link_info
))
3313 if (link_info
== NULL
&& bfd_get_symcount (abfd
) > 0)
3316 Elf_Internal_Shdr
*hdr
;
3318 off
= elf_tdata (abfd
)->next_file_pos
;
3320 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
3321 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
3323 hdr
= &elf_tdata (abfd
)->symtab_shndx_hdr
;
3324 if (hdr
->sh_size
!= 0)
3325 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
3327 hdr
= &elf_tdata (abfd
)->strtab_hdr
;
3328 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
3330 elf_tdata (abfd
)->next_file_pos
= off
;
3332 /* Now that we know where the .strtab section goes, write it
3334 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
3335 || ! _bfd_stringtab_emit (abfd
, strtab
))
3337 _bfd_stringtab_free (strtab
);
3340 abfd
->output_has_begun
= TRUE
;
3345 /* Create a mapping from a set of sections to a program segment. */
3347 static struct elf_segment_map
*
3348 make_mapping (bfd
*abfd
,
3349 asection
**sections
,
3354 struct elf_segment_map
*m
;
3359 amt
= sizeof (struct elf_segment_map
);
3360 amt
+= (to
- from
- 1) * sizeof (asection
*);
3361 m
= bfd_zalloc (abfd
, amt
);
3365 m
->p_type
= PT_LOAD
;
3366 for (i
= from
, hdrpp
= sections
+ from
; i
< to
; i
++, hdrpp
++)
3367 m
->sections
[i
- from
] = *hdrpp
;
3368 m
->count
= to
- from
;
3370 if (from
== 0 && phdr
)
3372 /* Include the headers in the first PT_LOAD segment. */
3373 m
->includes_filehdr
= 1;
3374 m
->includes_phdrs
= 1;
3380 /* Create the PT_DYNAMIC segment, which includes DYNSEC. Returns NULL
3383 struct elf_segment_map
*
3384 _bfd_elf_make_dynamic_segment (bfd
*abfd
, asection
*dynsec
)
3386 struct elf_segment_map
*m
;
3388 m
= bfd_zalloc (abfd
, sizeof (struct elf_segment_map
));
3392 m
->p_type
= PT_DYNAMIC
;
3394 m
->sections
[0] = dynsec
;
3399 /* Set up a mapping from BFD sections to program segments. */
3402 map_sections_to_segments (bfd
*abfd
)
3404 asection
**sections
= NULL
;
3408 struct elf_segment_map
*mfirst
;
3409 struct elf_segment_map
**pm
;
3410 struct elf_segment_map
*m
;
3413 unsigned int phdr_index
;
3414 bfd_vma maxpagesize
;
3416 bfd_boolean phdr_in_segment
= TRUE
;
3417 bfd_boolean writable
;
3419 asection
*first_tls
= NULL
;
3420 asection
*dynsec
, *eh_frame_hdr
;
3423 if (elf_tdata (abfd
)->segment_map
!= NULL
)
3426 if (bfd_count_sections (abfd
) == 0)
3429 /* Select the allocated sections, and sort them. */
3431 amt
= bfd_count_sections (abfd
) * sizeof (asection
*);
3432 sections
= bfd_malloc (amt
);
3433 if (sections
== NULL
)
3437 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
3439 if ((s
->flags
& SEC_ALLOC
) != 0)
3445 BFD_ASSERT (i
<= bfd_count_sections (abfd
));
3448 qsort (sections
, (size_t) count
, sizeof (asection
*), elf_sort_sections
);
3450 /* Build the mapping. */
3455 /* If we have a .interp section, then create a PT_PHDR segment for
3456 the program headers and a PT_INTERP segment for the .interp
3458 s
= bfd_get_section_by_name (abfd
, ".interp");
3459 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0)
3461 amt
= sizeof (struct elf_segment_map
);
3462 m
= bfd_zalloc (abfd
, amt
);
3466 m
->p_type
= PT_PHDR
;
3467 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
3468 m
->p_flags
= PF_R
| PF_X
;
3469 m
->p_flags_valid
= 1;
3470 m
->includes_phdrs
= 1;
3475 amt
= sizeof (struct elf_segment_map
);
3476 m
= bfd_zalloc (abfd
, amt
);
3480 m
->p_type
= PT_INTERP
;
3488 /* Look through the sections. We put sections in the same program
3489 segment when the start of the second section can be placed within
3490 a few bytes of the end of the first section. */
3494 maxpagesize
= get_elf_backend_data (abfd
)->maxpagesize
;
3496 dynsec
= bfd_get_section_by_name (abfd
, ".dynamic");
3498 && (dynsec
->flags
& SEC_LOAD
) == 0)
3501 /* Deal with -Ttext or something similar such that the first section
3502 is not adjacent to the program headers. This is an
3503 approximation, since at this point we don't know exactly how many
3504 program headers we will need. */
3507 bfd_size_type phdr_size
;
3509 phdr_size
= elf_tdata (abfd
)->program_header_size
;
3511 phdr_size
= get_elf_backend_data (abfd
)->s
->sizeof_phdr
;
3512 if ((abfd
->flags
& D_PAGED
) == 0
3513 || sections
[0]->lma
< phdr_size
3514 || sections
[0]->lma
% maxpagesize
< phdr_size
% maxpagesize
)
3515 phdr_in_segment
= FALSE
;
3518 for (i
= 0, hdrpp
= sections
; i
< count
; i
++, hdrpp
++)
3521 bfd_boolean new_segment
;
3525 /* See if this section and the last one will fit in the same
3528 if (last_hdr
== NULL
)
3530 /* If we don't have a segment yet, then we don't need a new
3531 one (we build the last one after this loop). */
3532 new_segment
= FALSE
;
3534 else if (last_hdr
->lma
- last_hdr
->vma
!= hdr
->lma
- hdr
->vma
)
3536 /* If this section has a different relation between the
3537 virtual address and the load address, then we need a new
3541 else if (BFD_ALIGN (last_hdr
->lma
+ last_size
, maxpagesize
)
3542 < BFD_ALIGN (hdr
->lma
, maxpagesize
))
3544 /* If putting this section in this segment would force us to
3545 skip a page in the segment, then we need a new segment. */
3548 else if ((last_hdr
->flags
& (SEC_LOAD
| SEC_THREAD_LOCAL
)) == 0
3549 && (hdr
->flags
& (SEC_LOAD
| SEC_THREAD_LOCAL
)) != 0)
3551 /* We don't want to put a loadable section after a
3552 nonloadable section in the same segment.
3553 Consider .tbss sections as loadable for this purpose. */
3556 else if ((abfd
->flags
& D_PAGED
) == 0)
3558 /* If the file is not demand paged, which means that we
3559 don't require the sections to be correctly aligned in the
3560 file, then there is no other reason for a new segment. */
3561 new_segment
= FALSE
;
3564 && (hdr
->flags
& SEC_READONLY
) == 0
3565 && (((last_hdr
->lma
+ last_size
- 1)
3566 & ~(maxpagesize
- 1))
3567 != (hdr
->lma
& ~(maxpagesize
- 1))))
3569 /* We don't want to put a writable section in a read only
3570 segment, unless they are on the same page in memory
3571 anyhow. We already know that the last section does not
3572 bring us past the current section on the page, so the
3573 only case in which the new section is not on the same
3574 page as the previous section is when the previous section
3575 ends precisely on a page boundary. */
3580 /* Otherwise, we can use the same segment. */
3581 new_segment
= FALSE
;
3586 if ((hdr
->flags
& SEC_READONLY
) == 0)
3589 /* .tbss sections effectively have zero size. */
3590 if ((hdr
->flags
& (SEC_THREAD_LOCAL
| SEC_LOAD
)) != SEC_THREAD_LOCAL
)
3591 last_size
= hdr
->size
;
3597 /* We need a new program segment. We must create a new program
3598 header holding all the sections from phdr_index until hdr. */
3600 m
= make_mapping (abfd
, sections
, phdr_index
, i
, phdr_in_segment
);
3607 if ((hdr
->flags
& SEC_READONLY
) == 0)
3613 /* .tbss sections effectively have zero size. */
3614 if ((hdr
->flags
& (SEC_THREAD_LOCAL
| SEC_LOAD
)) != SEC_THREAD_LOCAL
)
3615 last_size
= hdr
->size
;
3619 phdr_in_segment
= FALSE
;
3622 /* Create a final PT_LOAD program segment. */
3623 if (last_hdr
!= NULL
)
3625 m
= make_mapping (abfd
, sections
, phdr_index
, i
, phdr_in_segment
);
3633 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
3636 m
= _bfd_elf_make_dynamic_segment (abfd
, dynsec
);
3643 /* For each loadable .note section, add a PT_NOTE segment. We don't
3644 use bfd_get_section_by_name, because if we link together
3645 nonloadable .note sections and loadable .note sections, we will
3646 generate two .note sections in the output file. FIXME: Using
3647 names for section types is bogus anyhow. */
3648 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
3650 if ((s
->flags
& SEC_LOAD
) != 0
3651 && strncmp (s
->name
, ".note", 5) == 0)
3653 amt
= sizeof (struct elf_segment_map
);
3654 m
= bfd_zalloc (abfd
, amt
);
3658 m
->p_type
= PT_NOTE
;
3665 if (s
->flags
& SEC_THREAD_LOCAL
)
3673 /* If there are any SHF_TLS output sections, add PT_TLS segment. */
3678 amt
= sizeof (struct elf_segment_map
);
3679 amt
+= (tls_count
- 1) * sizeof (asection
*);
3680 m
= bfd_zalloc (abfd
, amt
);
3685 m
->count
= tls_count
;
3686 /* Mandated PF_R. */
3688 m
->p_flags_valid
= 1;
3689 for (i
= 0; i
< tls_count
; ++i
)
3691 BFD_ASSERT (first_tls
->flags
& SEC_THREAD_LOCAL
);
3692 m
->sections
[i
] = first_tls
;
3693 first_tls
= first_tls
->next
;
3700 /* If there is a .eh_frame_hdr section, throw in a PT_GNU_EH_FRAME
3702 eh_frame_hdr
= elf_tdata (abfd
)->eh_frame_hdr
;
3703 if (eh_frame_hdr
!= NULL
3704 && (eh_frame_hdr
->output_section
->flags
& SEC_LOAD
) != 0)
3706 amt
= sizeof (struct elf_segment_map
);
3707 m
= bfd_zalloc (abfd
, amt
);
3711 m
->p_type
= PT_GNU_EH_FRAME
;
3713 m
->sections
[0] = eh_frame_hdr
->output_section
;
3719 if (elf_tdata (abfd
)->stack_flags
)
3721 amt
= sizeof (struct elf_segment_map
);
3722 m
= bfd_zalloc (abfd
, amt
);
3726 m
->p_type
= PT_GNU_STACK
;
3727 m
->p_flags
= elf_tdata (abfd
)->stack_flags
;
3728 m
->p_flags_valid
= 1;
3734 if (elf_tdata (abfd
)->relro
)
3736 amt
= sizeof (struct elf_segment_map
);
3737 m
= bfd_zalloc (abfd
, amt
);
3741 m
->p_type
= PT_GNU_RELRO
;
3743 m
->p_flags_valid
= 1;
3752 elf_tdata (abfd
)->segment_map
= mfirst
;
3756 if (sections
!= NULL
)
3761 /* Sort sections by address. */
3764 elf_sort_sections (const void *arg1
, const void *arg2
)
3766 const asection
*sec1
= *(const asection
**) arg1
;
3767 const asection
*sec2
= *(const asection
**) arg2
;
3768 bfd_size_type size1
, size2
;
3770 /* Sort by LMA first, since this is the address used to
3771 place the section into a segment. */
3772 if (sec1
->lma
< sec2
->lma
)
3774 else if (sec1
->lma
> sec2
->lma
)
3777 /* Then sort by VMA. Normally the LMA and the VMA will be
3778 the same, and this will do nothing. */
3779 if (sec1
->vma
< sec2
->vma
)
3781 else if (sec1
->vma
> sec2
->vma
)
3784 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
3786 #define TOEND(x) (((x)->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0)
3792 /* If the indicies are the same, do not return 0
3793 here, but continue to try the next comparison. */
3794 if (sec1
->target_index
- sec2
->target_index
!= 0)
3795 return sec1
->target_index
- sec2
->target_index
;
3800 else if (TOEND (sec2
))
3805 /* Sort by size, to put zero sized sections
3806 before others at the same address. */
3808 size1
= (sec1
->flags
& SEC_LOAD
) ? sec1
->size
: 0;
3809 size2
= (sec2
->flags
& SEC_LOAD
) ? sec2
->size
: 0;
3816 return sec1
->target_index
- sec2
->target_index
;
3819 /* Ian Lance Taylor writes:
3821 We shouldn't be using % with a negative signed number. That's just
3822 not good. We have to make sure either that the number is not
3823 negative, or that the number has an unsigned type. When the types
3824 are all the same size they wind up as unsigned. When file_ptr is a
3825 larger signed type, the arithmetic winds up as signed long long,
3828 What we're trying to say here is something like ``increase OFF by
3829 the least amount that will cause it to be equal to the VMA modulo
3831 /* In other words, something like:
3833 vma_offset = m->sections[0]->vma % bed->maxpagesize;
3834 off_offset = off % bed->maxpagesize;
3835 if (vma_offset < off_offset)
3836 adjustment = vma_offset + bed->maxpagesize - off_offset;
3838 adjustment = vma_offset - off_offset;
3840 which can can be collapsed into the expression below. */
3843 vma_page_aligned_bias (bfd_vma vma
, ufile_ptr off
, bfd_vma maxpagesize
)
3845 return ((vma
- off
) % maxpagesize
);
3848 /* Assign file positions to the sections based on the mapping from
3849 sections to segments. This function also sets up some fields in
3850 the file header, and writes out the program headers. */
3853 assign_file_positions_for_segments (bfd
*abfd
, struct bfd_link_info
*link_info
)
3855 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3857 struct elf_segment_map
*m
;
3859 Elf_Internal_Phdr
*phdrs
;
3861 bfd_vma filehdr_vaddr
, filehdr_paddr
;
3862 bfd_vma phdrs_vaddr
, phdrs_paddr
;
3863 Elf_Internal_Phdr
*p
;
3866 if (elf_tdata (abfd
)->segment_map
== NULL
)
3868 if (! map_sections_to_segments (abfd
))
3873 /* The placement algorithm assumes that non allocated sections are
3874 not in PT_LOAD segments. We ensure this here by removing such
3875 sections from the segment map. */
3876 for (m
= elf_tdata (abfd
)->segment_map
;
3880 unsigned int new_count
;
3883 if (m
->p_type
!= PT_LOAD
)
3887 for (i
= 0; i
< m
->count
; i
++)
3889 if ((m
->sections
[i
]->flags
& SEC_ALLOC
) != 0)
3892 m
->sections
[new_count
] = m
->sections
[i
];
3898 if (new_count
!= m
->count
)
3899 m
->count
= new_count
;
3903 if (bed
->elf_backend_modify_segment_map
)
3905 if (! (*bed
->elf_backend_modify_segment_map
) (abfd
, link_info
))
3910 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
3913 elf_elfheader (abfd
)->e_phoff
= bed
->s
->sizeof_ehdr
;
3914 elf_elfheader (abfd
)->e_phentsize
= bed
->s
->sizeof_phdr
;
3915 elf_elfheader (abfd
)->e_phnum
= count
;
3919 elf_tdata (abfd
)->next_file_pos
= bed
->s
->sizeof_ehdr
;
3923 /* If we already counted the number of program segments, make sure
3924 that we allocated enough space. This happens when SIZEOF_HEADERS
3925 is used in a linker script. */
3926 alloc
= elf_tdata (abfd
)->program_header_size
/ bed
->s
->sizeof_phdr
;
3927 if (alloc
!= 0 && count
> alloc
)
3929 ((*_bfd_error_handler
)
3930 (_("%B: Not enough room for program headers (allocated %u, need %u)"),
3931 abfd
, alloc
, count
));
3932 bfd_set_error (bfd_error_bad_value
);
3939 amt
= alloc
* sizeof (Elf_Internal_Phdr
);
3940 phdrs
= bfd_alloc (abfd
, amt
);
3944 off
= bed
->s
->sizeof_ehdr
;
3945 off
+= alloc
* bed
->s
->sizeof_phdr
;
3952 for (m
= elf_tdata (abfd
)->segment_map
, p
= phdrs
;
3959 /* If elf_segment_map is not from map_sections_to_segments, the
3960 sections may not be correctly ordered. NOTE: sorting should
3961 not be done to the PT_NOTE section of a corefile, which may
3962 contain several pseudo-sections artificially created by bfd.
3963 Sorting these pseudo-sections breaks things badly. */
3965 && !(elf_elfheader (abfd
)->e_type
== ET_CORE
3966 && m
->p_type
== PT_NOTE
))
3967 qsort (m
->sections
, (size_t) m
->count
, sizeof (asection
*),
3970 /* An ELF segment (described by Elf_Internal_Phdr) may contain a
3971 number of sections with contents contributing to both p_filesz
3972 and p_memsz, followed by a number of sections with no contents
3973 that just contribute to p_memsz. In this loop, OFF tracks next
3974 available file offset for PT_LOAD and PT_NOTE segments. VOFF is
3975 an adjustment we use for segments that have no file contents
3976 but need zero filled memory allocation. */
3978 p
->p_type
= m
->p_type
;
3979 p
->p_flags
= m
->p_flags
;
3981 if (p
->p_type
== PT_LOAD
3984 bfd_size_type align
;
3987 if ((abfd
->flags
& D_PAGED
) != 0)
3988 align
= bed
->maxpagesize
;
3991 unsigned int align_power
= 0;
3992 for (i
= 0, secpp
= m
->sections
; i
< m
->count
; i
++, secpp
++)
3994 unsigned int secalign
;
3996 secalign
= bfd_get_section_alignment (abfd
, *secpp
);
3997 if (secalign
> align_power
)
3998 align_power
= secalign
;
4000 align
= (bfd_size_type
) 1 << align_power
;
4003 adjust
= vma_page_aligned_bias (m
->sections
[0]->vma
, off
, align
);
4006 && !m
->includes_filehdr
4007 && !m
->includes_phdrs
4008 && (ufile_ptr
) off
>= align
)
4010 /* If the first section isn't loadable, the same holds for
4011 any other sections. Since the segment won't need file
4012 space, we can make p_offset overlap some prior segment.
4013 However, .tbss is special. If a segment starts with
4014 .tbss, we need to look at the next section to decide
4015 whether the segment has any loadable sections. */
4017 while ((m
->sections
[i
]->flags
& SEC_LOAD
) == 0)
4019 if ((m
->sections
[i
]->flags
& SEC_THREAD_LOCAL
) == 0
4023 voff
= adjust
- align
;
4029 /* Make sure the .dynamic section is the first section in the
4030 PT_DYNAMIC segment. */
4031 else if (p
->p_type
== PT_DYNAMIC
4033 && strcmp (m
->sections
[0]->name
, ".dynamic") != 0)
4036 (_("%B: The first section in the PT_DYNAMIC segment is not the .dynamic section"),
4038 bfd_set_error (bfd_error_bad_value
);
4045 p
->p_vaddr
= m
->sections
[0]->vma
;
4047 if (m
->p_paddr_valid
)
4048 p
->p_paddr
= m
->p_paddr
;
4049 else if (m
->count
== 0)
4052 p
->p_paddr
= m
->sections
[0]->lma
;
4054 if (p
->p_type
== PT_LOAD
4055 && (abfd
->flags
& D_PAGED
) != 0)
4056 p
->p_align
= bed
->maxpagesize
;
4057 else if (m
->count
== 0)
4058 p
->p_align
= 1 << bed
->s
->log_file_align
;
4066 if (m
->includes_filehdr
)
4068 if (! m
->p_flags_valid
)
4071 p
->p_filesz
= bed
->s
->sizeof_ehdr
;
4072 p
->p_memsz
= bed
->s
->sizeof_ehdr
;
4075 BFD_ASSERT (p
->p_type
== PT_LOAD
);
4077 if (p
->p_vaddr
< (bfd_vma
) off
)
4079 (*_bfd_error_handler
)
4080 (_("%B: Not enough room for program headers, try linking with -N"),
4082 bfd_set_error (bfd_error_bad_value
);
4087 if (! m
->p_paddr_valid
)
4090 if (p
->p_type
== PT_LOAD
)
4092 filehdr_vaddr
= p
->p_vaddr
;
4093 filehdr_paddr
= p
->p_paddr
;
4097 if (m
->includes_phdrs
)
4099 if (! m
->p_flags_valid
)
4102 if (m
->includes_filehdr
)
4104 if (p
->p_type
== PT_LOAD
)
4106 phdrs_vaddr
= p
->p_vaddr
+ bed
->s
->sizeof_ehdr
;
4107 phdrs_paddr
= p
->p_paddr
+ bed
->s
->sizeof_ehdr
;
4112 p
->p_offset
= bed
->s
->sizeof_ehdr
;
4116 BFD_ASSERT (p
->p_type
== PT_LOAD
);
4117 p
->p_vaddr
-= off
- p
->p_offset
;
4118 if (! m
->p_paddr_valid
)
4119 p
->p_paddr
-= off
- p
->p_offset
;
4122 if (p
->p_type
== PT_LOAD
)
4124 phdrs_vaddr
= p
->p_vaddr
;
4125 phdrs_paddr
= p
->p_paddr
;
4128 phdrs_vaddr
= bed
->maxpagesize
+ bed
->s
->sizeof_ehdr
;
4131 p
->p_filesz
+= alloc
* bed
->s
->sizeof_phdr
;
4132 p
->p_memsz
+= alloc
* bed
->s
->sizeof_phdr
;
4135 if (p
->p_type
== PT_LOAD
4136 || (p
->p_type
== PT_NOTE
&& bfd_get_format (abfd
) == bfd_core
))
4138 if (! m
->includes_filehdr
&& ! m
->includes_phdrs
)
4139 p
->p_offset
= off
+ voff
;
4144 adjust
= off
- (p
->p_offset
+ p
->p_filesz
);
4145 p
->p_filesz
+= adjust
;
4146 p
->p_memsz
+= adjust
;
4150 for (i
= 0, secpp
= m
->sections
; i
< m
->count
; i
++, secpp
++)
4154 bfd_size_type align
;
4158 align
= 1 << bfd_get_section_alignment (abfd
, sec
);
4160 if (p
->p_type
== PT_LOAD
4161 || p
->p_type
== PT_TLS
)
4163 bfd_signed_vma adjust
;
4165 if ((flags
& SEC_LOAD
) != 0)
4167 adjust
= sec
->lma
- (p
->p_paddr
+ p
->p_filesz
);
4170 (*_bfd_error_handler
)
4171 (_("%B: section %A lma 0x%lx overlaps previous sections"),
4172 abfd
, sec
, (unsigned long) sec
->lma
);
4176 p
->p_filesz
+= adjust
;
4177 p
->p_memsz
+= adjust
;
4179 /* .tbss is special. It doesn't contribute to p_memsz of
4181 else if ((flags
& SEC_THREAD_LOCAL
) == 0
4182 || p
->p_type
== PT_TLS
)
4184 /* The section VMA must equal the file position
4185 modulo the page size. */
4186 bfd_size_type page
= align
;
4187 if ((abfd
->flags
& D_PAGED
) != 0)
4188 page
= bed
->maxpagesize
;
4189 adjust
= vma_page_aligned_bias (sec
->vma
,
4190 p
->p_vaddr
+ p
->p_memsz
,
4192 p
->p_memsz
+= adjust
;
4196 if (p
->p_type
== PT_NOTE
&& bfd_get_format (abfd
) == bfd_core
)
4198 /* The section at i == 0 is the one that actually contains
4204 p
->p_filesz
= sec
->size
;
4210 /* The rest are fake sections that shouldn't be written. */
4219 if (p
->p_type
== PT_LOAD
)
4222 /* FIXME: The SEC_HAS_CONTENTS test here dates back to
4223 1997, and the exact reason for it isn't clear. One
4224 plausible explanation is that it is to work around
4225 a problem we have with linker scripts using data
4226 statements in NOLOAD sections. I don't think it
4227 makes a great deal of sense to have such a section
4228 assigned to a PT_LOAD segment, but apparently
4229 people do this. The data statement results in a
4230 bfd_data_link_order being built, and these need
4231 section contents to write into. Eventually, we get
4232 to _bfd_elf_write_object_contents which writes any
4233 section with contents to the output. Make room
4234 here for the write, so that following segments are
4236 if ((flags
& SEC_LOAD
) != 0
4237 || (flags
& SEC_HAS_CONTENTS
) != 0)
4241 if ((flags
& SEC_LOAD
) != 0)
4243 p
->p_filesz
+= sec
->size
;
4244 p
->p_memsz
+= sec
->size
;
4246 /* PR ld/594: Sections in note segments which are not loaded
4247 contribute to the file size but not the in-memory size. */
4248 else if (p
->p_type
== PT_NOTE
4249 && (flags
& SEC_HAS_CONTENTS
) != 0)
4250 p
->p_filesz
+= sec
->size
;
4252 /* .tbss is special. It doesn't contribute to p_memsz of
4254 else if ((flags
& SEC_THREAD_LOCAL
) == 0
4255 || p
->p_type
== PT_TLS
)
4256 p
->p_memsz
+= sec
->size
;
4258 if (p
->p_type
== PT_TLS
4260 && (sec
->flags
& SEC_HAS_CONTENTS
) == 0)
4262 struct bfd_link_order
*o
;
4263 bfd_vma tbss_size
= 0;
4265 for (o
= sec
->link_order_head
; o
!= NULL
; o
= o
->next
)
4266 if (tbss_size
< o
->offset
+ o
->size
)
4267 tbss_size
= o
->offset
+ o
->size
;
4269 p
->p_memsz
+= tbss_size
;
4272 if (align
> p
->p_align
4273 && (p
->p_type
!= PT_LOAD
|| (abfd
->flags
& D_PAGED
) == 0))
4277 if (! m
->p_flags_valid
)
4280 if ((flags
& SEC_CODE
) != 0)
4282 if ((flags
& SEC_READONLY
) == 0)
4288 /* Now that we have set the section file positions, we can set up
4289 the file positions for the non PT_LOAD segments. */
4290 for (m
= elf_tdata (abfd
)->segment_map
, p
= phdrs
;
4294 if (p
->p_type
!= PT_LOAD
&& m
->count
> 0)
4296 BFD_ASSERT (! m
->includes_filehdr
&& ! m
->includes_phdrs
);
4297 /* If the section has not yet been assigned a file position,
4298 do so now. The ARM BPABI requires that .dynamic section
4299 not be marked SEC_ALLOC because it is not part of any
4300 PT_LOAD segment, so it will not be processed above. */
4301 if (p
->p_type
== PT_DYNAMIC
&& m
->sections
[0]->filepos
== 0)
4304 Elf_Internal_Shdr
** const i_shdrpp
= elf_elfsections (abfd
);
4307 while (i_shdrpp
[i
]->bfd_section
!= m
->sections
[0])
4309 off
= (_bfd_elf_assign_file_position_for_section
4310 (i_shdrpp
[i
], off
, TRUE
));
4311 p
->p_filesz
= m
->sections
[0]->size
;
4313 p
->p_offset
= m
->sections
[0]->filepos
;
4317 if (m
->includes_filehdr
)
4319 p
->p_vaddr
= filehdr_vaddr
;
4320 if (! m
->p_paddr_valid
)
4321 p
->p_paddr
= filehdr_paddr
;
4323 else if (m
->includes_phdrs
)
4325 p
->p_vaddr
= phdrs_vaddr
;
4326 if (! m
->p_paddr_valid
)
4327 p
->p_paddr
= phdrs_paddr
;
4329 else if (p
->p_type
== PT_GNU_RELRO
)
4331 Elf_Internal_Phdr
*lp
;
4333 for (lp
= phdrs
; lp
< phdrs
+ count
; ++lp
)
4335 if (lp
->p_type
== PT_LOAD
4336 && lp
->p_vaddr
<= link_info
->relro_end
4337 && lp
->p_vaddr
>= link_info
->relro_start
4338 && lp
->p_vaddr
+ lp
->p_filesz
4339 >= link_info
->relro_end
)
4343 if (lp
< phdrs
+ count
4344 && link_info
->relro_end
> lp
->p_vaddr
)
4346 p
->p_vaddr
= lp
->p_vaddr
;
4347 p
->p_paddr
= lp
->p_paddr
;
4348 p
->p_offset
= lp
->p_offset
;
4349 p
->p_filesz
= link_info
->relro_end
- lp
->p_vaddr
;
4350 p
->p_memsz
= p
->p_filesz
;
4352 p
->p_flags
= (lp
->p_flags
& ~PF_W
);
4356 memset (p
, 0, sizeof *p
);
4357 p
->p_type
= PT_NULL
;
4363 /* Clear out any program headers we allocated but did not use. */
4364 for (; count
< alloc
; count
++, p
++)
4366 memset (p
, 0, sizeof *p
);
4367 p
->p_type
= PT_NULL
;
4370 elf_tdata (abfd
)->phdr
= phdrs
;
4372 elf_tdata (abfd
)->next_file_pos
= off
;
4374 /* Write out the program headers. */
4375 if (bfd_seek (abfd
, (bfd_signed_vma
) bed
->s
->sizeof_ehdr
, SEEK_SET
) != 0
4376 || bed
->s
->write_out_phdrs (abfd
, phdrs
, alloc
) != 0)
4382 /* Get the size of the program header.
4384 If this is called by the linker before any of the section VMA's are set, it
4385 can't calculate the correct value for a strange memory layout. This only
4386 happens when SIZEOF_HEADERS is used in a linker script. In this case,
4387 SORTED_HDRS is NULL and we assume the normal scenario of one text and one
4388 data segment (exclusive of .interp and .dynamic).
4390 ??? User written scripts must either not use SIZEOF_HEADERS, or assume there
4391 will be two segments. */
4393 static bfd_size_type
4394 get_program_header_size (bfd
*abfd
)
4398 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4400 /* We can't return a different result each time we're called. */
4401 if (elf_tdata (abfd
)->program_header_size
!= 0)
4402 return elf_tdata (abfd
)->program_header_size
;
4404 if (elf_tdata (abfd
)->segment_map
!= NULL
)
4406 struct elf_segment_map
*m
;
4409 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
4411 elf_tdata (abfd
)->program_header_size
= segs
* bed
->s
->sizeof_phdr
;
4412 return elf_tdata (abfd
)->program_header_size
;
4415 /* Assume we will need exactly two PT_LOAD segments: one for text
4416 and one for data. */
4419 s
= bfd_get_section_by_name (abfd
, ".interp");
4420 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0)
4422 /* If we have a loadable interpreter section, we need a
4423 PT_INTERP segment. In this case, assume we also need a
4424 PT_PHDR segment, although that may not be true for all
4429 if (bfd_get_section_by_name (abfd
, ".dynamic") != NULL
)
4431 /* We need a PT_DYNAMIC segment. */
4435 if (elf_tdata (abfd
)->eh_frame_hdr
)
4437 /* We need a PT_GNU_EH_FRAME segment. */
4441 if (elf_tdata (abfd
)->stack_flags
)
4443 /* We need a PT_GNU_STACK segment. */
4447 if (elf_tdata (abfd
)->relro
)
4449 /* We need a PT_GNU_RELRO segment. */
4453 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
4455 if ((s
->flags
& SEC_LOAD
) != 0
4456 && strncmp (s
->name
, ".note", 5) == 0)
4458 /* We need a PT_NOTE segment. */
4463 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
4465 if (s
->flags
& SEC_THREAD_LOCAL
)
4467 /* We need a PT_TLS segment. */
4473 /* Let the backend count up any program headers it might need. */
4474 if (bed
->elf_backend_additional_program_headers
)
4478 a
= (*bed
->elf_backend_additional_program_headers
) (abfd
);
4484 elf_tdata (abfd
)->program_header_size
= segs
* bed
->s
->sizeof_phdr
;
4485 return elf_tdata (abfd
)->program_header_size
;
4488 /* Work out the file positions of all the sections. This is called by
4489 _bfd_elf_compute_section_file_positions. All the section sizes and
4490 VMAs must be known before this is called.
4492 Reloc sections come in two flavours: Those processed specially as
4493 "side-channel" data attached to a section to which they apply, and
4494 those that bfd doesn't process as relocations. The latter sort are
4495 stored in a normal bfd section by bfd_section_from_shdr. We don't
4496 consider the former sort here, unless they form part of the loadable
4497 image. Reloc sections not assigned here will be handled later by
4498 assign_file_positions_for_relocs.
4500 We also don't set the positions of the .symtab and .strtab here. */
4503 assign_file_positions_except_relocs (bfd
*abfd
,
4504 struct bfd_link_info
*link_info
)
4506 struct elf_obj_tdata
* const tdata
= elf_tdata (abfd
);
4507 Elf_Internal_Ehdr
* const i_ehdrp
= elf_elfheader (abfd
);
4508 Elf_Internal_Shdr
** const i_shdrpp
= elf_elfsections (abfd
);
4509 unsigned int num_sec
= elf_numsections (abfd
);
4511 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4513 if ((abfd
->flags
& (EXEC_P
| DYNAMIC
)) == 0
4514 && bfd_get_format (abfd
) != bfd_core
)
4516 Elf_Internal_Shdr
**hdrpp
;
4519 /* Start after the ELF header. */
4520 off
= i_ehdrp
->e_ehsize
;
4522 /* We are not creating an executable, which means that we are
4523 not creating a program header, and that the actual order of
4524 the sections in the file is unimportant. */
4525 for (i
= 1, hdrpp
= i_shdrpp
+ 1; i
< num_sec
; i
++, hdrpp
++)
4527 Elf_Internal_Shdr
*hdr
;
4530 if (((hdr
->sh_type
== SHT_REL
|| hdr
->sh_type
== SHT_RELA
)
4531 && hdr
->bfd_section
== NULL
)
4532 || i
== tdata
->symtab_section
4533 || i
== tdata
->symtab_shndx_section
4534 || i
== tdata
->strtab_section
)
4536 hdr
->sh_offset
= -1;
4539 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
4541 if (i
== SHN_LORESERVE
- 1)
4543 i
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4544 hdrpp
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4551 Elf_Internal_Shdr
**hdrpp
;
4553 /* Assign file positions for the loaded sections based on the
4554 assignment of sections to segments. */
4555 if (! assign_file_positions_for_segments (abfd
, link_info
))
4558 /* Assign file positions for the other sections. */
4560 off
= elf_tdata (abfd
)->next_file_pos
;
4561 for (i
= 1, hdrpp
= i_shdrpp
+ 1; i
< num_sec
; i
++, hdrpp
++)
4563 Elf_Internal_Shdr
*hdr
;
4566 if (hdr
->bfd_section
!= NULL
4567 && hdr
->bfd_section
->filepos
!= 0)
4568 hdr
->sh_offset
= hdr
->bfd_section
->filepos
;
4569 else if ((hdr
->sh_flags
& SHF_ALLOC
) != 0)
4571 ((*_bfd_error_handler
)
4572 (_("%B: warning: allocated section `%s' not in segment"),
4574 (hdr
->bfd_section
== NULL
4576 : hdr
->bfd_section
->name
)));
4577 if ((abfd
->flags
& D_PAGED
) != 0)
4578 off
+= vma_page_aligned_bias (hdr
->sh_addr
, off
,
4581 off
+= vma_page_aligned_bias (hdr
->sh_addr
, off
,
4583 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
,
4586 else if (((hdr
->sh_type
== SHT_REL
|| hdr
->sh_type
== SHT_RELA
)
4587 && hdr
->bfd_section
== NULL
)
4588 || hdr
== i_shdrpp
[tdata
->symtab_section
]
4589 || hdr
== i_shdrpp
[tdata
->symtab_shndx_section
]
4590 || hdr
== i_shdrpp
[tdata
->strtab_section
])
4591 hdr
->sh_offset
= -1;
4593 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
4595 if (i
== SHN_LORESERVE
- 1)
4597 i
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4598 hdrpp
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4603 /* Place the section headers. */
4604 off
= align_file_position (off
, 1 << bed
->s
->log_file_align
);
4605 i_ehdrp
->e_shoff
= off
;
4606 off
+= i_ehdrp
->e_shnum
* i_ehdrp
->e_shentsize
;
4608 elf_tdata (abfd
)->next_file_pos
= off
;
4614 prep_headers (bfd
*abfd
)
4616 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
4617 Elf_Internal_Phdr
*i_phdrp
= 0; /* Program header table, internal form */
4618 Elf_Internal_Shdr
**i_shdrp
; /* Section header table, internal form */
4619 struct elf_strtab_hash
*shstrtab
;
4620 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4622 i_ehdrp
= elf_elfheader (abfd
);
4623 i_shdrp
= elf_elfsections (abfd
);
4625 shstrtab
= _bfd_elf_strtab_init ();
4626 if (shstrtab
== NULL
)
4629 elf_shstrtab (abfd
) = shstrtab
;
4631 i_ehdrp
->e_ident
[EI_MAG0
] = ELFMAG0
;
4632 i_ehdrp
->e_ident
[EI_MAG1
] = ELFMAG1
;
4633 i_ehdrp
->e_ident
[EI_MAG2
] = ELFMAG2
;
4634 i_ehdrp
->e_ident
[EI_MAG3
] = ELFMAG3
;
4636 i_ehdrp
->e_ident
[EI_CLASS
] = bed
->s
->elfclass
;
4637 i_ehdrp
->e_ident
[EI_DATA
] =
4638 bfd_big_endian (abfd
) ? ELFDATA2MSB
: ELFDATA2LSB
;
4639 i_ehdrp
->e_ident
[EI_VERSION
] = bed
->s
->ev_current
;
4641 if ((abfd
->flags
& DYNAMIC
) != 0)
4642 i_ehdrp
->e_type
= ET_DYN
;
4643 else if ((abfd
->flags
& EXEC_P
) != 0)
4644 i_ehdrp
->e_type
= ET_EXEC
;
4645 else if (bfd_get_format (abfd
) == bfd_core
)
4646 i_ehdrp
->e_type
= ET_CORE
;
4648 i_ehdrp
->e_type
= ET_REL
;
4650 switch (bfd_get_arch (abfd
))
4652 case bfd_arch_unknown
:
4653 i_ehdrp
->e_machine
= EM_NONE
;
4656 /* There used to be a long list of cases here, each one setting
4657 e_machine to the same EM_* macro #defined as ELF_MACHINE_CODE
4658 in the corresponding bfd definition. To avoid duplication,
4659 the switch was removed. Machines that need special handling
4660 can generally do it in elf_backend_final_write_processing(),
4661 unless they need the information earlier than the final write.
4662 Such need can generally be supplied by replacing the tests for
4663 e_machine with the conditions used to determine it. */
4665 i_ehdrp
->e_machine
= bed
->elf_machine_code
;
4668 i_ehdrp
->e_version
= bed
->s
->ev_current
;
4669 i_ehdrp
->e_ehsize
= bed
->s
->sizeof_ehdr
;
4671 /* No program header, for now. */
4672 i_ehdrp
->e_phoff
= 0;
4673 i_ehdrp
->e_phentsize
= 0;
4674 i_ehdrp
->e_phnum
= 0;
4676 /* Each bfd section is section header entry. */
4677 i_ehdrp
->e_entry
= bfd_get_start_address (abfd
);
4678 i_ehdrp
->e_shentsize
= bed
->s
->sizeof_shdr
;
4680 /* If we're building an executable, we'll need a program header table. */
4681 if (abfd
->flags
& EXEC_P
)
4682 /* It all happens later. */
4686 i_ehdrp
->e_phentsize
= 0;
4688 i_ehdrp
->e_phoff
= 0;
4691 elf_tdata (abfd
)->symtab_hdr
.sh_name
=
4692 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".symtab", FALSE
);
4693 elf_tdata (abfd
)->strtab_hdr
.sh_name
=
4694 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".strtab", FALSE
);
4695 elf_tdata (abfd
)->shstrtab_hdr
.sh_name
=
4696 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".shstrtab", FALSE
);
4697 if (elf_tdata (abfd
)->symtab_hdr
.sh_name
== (unsigned int) -1
4698 || elf_tdata (abfd
)->symtab_hdr
.sh_name
== (unsigned int) -1
4699 || elf_tdata (abfd
)->shstrtab_hdr
.sh_name
== (unsigned int) -1)
4705 /* Assign file positions for all the reloc sections which are not part
4706 of the loadable file image. */
4709 _bfd_elf_assign_file_positions_for_relocs (bfd
*abfd
)
4712 unsigned int i
, num_sec
;
4713 Elf_Internal_Shdr
**shdrpp
;
4715 off
= elf_tdata (abfd
)->next_file_pos
;
4717 num_sec
= elf_numsections (abfd
);
4718 for (i
= 1, shdrpp
= elf_elfsections (abfd
) + 1; i
< num_sec
; i
++, shdrpp
++)
4720 Elf_Internal_Shdr
*shdrp
;
4723 if ((shdrp
->sh_type
== SHT_REL
|| shdrp
->sh_type
== SHT_RELA
)
4724 && shdrp
->sh_offset
== -1)
4725 off
= _bfd_elf_assign_file_position_for_section (shdrp
, off
, TRUE
);
4728 elf_tdata (abfd
)->next_file_pos
= off
;
4732 _bfd_elf_write_object_contents (bfd
*abfd
)
4734 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4735 Elf_Internal_Ehdr
*i_ehdrp
;
4736 Elf_Internal_Shdr
**i_shdrp
;
4738 unsigned int count
, num_sec
;
4740 if (! abfd
->output_has_begun
4741 && ! _bfd_elf_compute_section_file_positions (abfd
, NULL
))
4744 i_shdrp
= elf_elfsections (abfd
);
4745 i_ehdrp
= elf_elfheader (abfd
);
4748 bfd_map_over_sections (abfd
, bed
->s
->write_relocs
, &failed
);
4752 _bfd_elf_assign_file_positions_for_relocs (abfd
);
4754 /* After writing the headers, we need to write the sections too... */
4755 num_sec
= elf_numsections (abfd
);
4756 for (count
= 1; count
< num_sec
; count
++)
4758 if (bed
->elf_backend_section_processing
)
4759 (*bed
->elf_backend_section_processing
) (abfd
, i_shdrp
[count
]);
4760 if (i_shdrp
[count
]->contents
)
4762 bfd_size_type amt
= i_shdrp
[count
]->sh_size
;
4764 if (bfd_seek (abfd
, i_shdrp
[count
]->sh_offset
, SEEK_SET
) != 0
4765 || bfd_bwrite (i_shdrp
[count
]->contents
, amt
, abfd
) != amt
)
4768 if (count
== SHN_LORESERVE
- 1)
4769 count
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4772 /* Write out the section header names. */
4773 if (bfd_seek (abfd
, elf_tdata (abfd
)->shstrtab_hdr
.sh_offset
, SEEK_SET
) != 0
4774 || ! _bfd_elf_strtab_emit (abfd
, elf_shstrtab (abfd
)))
4777 if (bed
->elf_backend_final_write_processing
)
4778 (*bed
->elf_backend_final_write_processing
) (abfd
,
4779 elf_tdata (abfd
)->linker
);
4781 return bed
->s
->write_shdrs_and_ehdr (abfd
);
4785 _bfd_elf_write_corefile_contents (bfd
*abfd
)
4787 /* Hopefully this can be done just like an object file. */
4788 return _bfd_elf_write_object_contents (abfd
);
4791 /* Given a section, search the header to find them. */
4794 _bfd_elf_section_from_bfd_section (bfd
*abfd
, struct bfd_section
*asect
)
4796 const struct elf_backend_data
*bed
;
4799 if (elf_section_data (asect
) != NULL
4800 && elf_section_data (asect
)->this_idx
!= 0)
4801 return elf_section_data (asect
)->this_idx
;
4803 if (bfd_is_abs_section (asect
))
4805 else if (bfd_is_com_section (asect
))
4807 else if (bfd_is_und_section (asect
))
4812 bed
= get_elf_backend_data (abfd
);
4813 if (bed
->elf_backend_section_from_bfd_section
)
4817 if ((*bed
->elf_backend_section_from_bfd_section
) (abfd
, asect
, &retval
))
4822 bfd_set_error (bfd_error_nonrepresentable_section
);
4827 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
4831 _bfd_elf_symbol_from_bfd_symbol (bfd
*abfd
, asymbol
**asym_ptr_ptr
)
4833 asymbol
*asym_ptr
= *asym_ptr_ptr
;
4835 flagword flags
= asym_ptr
->flags
;
4837 /* When gas creates relocations against local labels, it creates its
4838 own symbol for the section, but does put the symbol into the
4839 symbol chain, so udata is 0. When the linker is generating
4840 relocatable output, this section symbol may be for one of the
4841 input sections rather than the output section. */
4842 if (asym_ptr
->udata
.i
== 0
4843 && (flags
& BSF_SECTION_SYM
)
4844 && asym_ptr
->section
)
4848 if (asym_ptr
->section
->output_section
!= NULL
)
4849 indx
= asym_ptr
->section
->output_section
->index
;
4851 indx
= asym_ptr
->section
->index
;
4852 if (indx
< elf_num_section_syms (abfd
)
4853 && elf_section_syms (abfd
)[indx
] != NULL
)
4854 asym_ptr
->udata
.i
= elf_section_syms (abfd
)[indx
]->udata
.i
;
4857 idx
= asym_ptr
->udata
.i
;
4861 /* This case can occur when using --strip-symbol on a symbol
4862 which is used in a relocation entry. */
4863 (*_bfd_error_handler
)
4864 (_("%B: symbol `%s' required but not present"),
4865 abfd
, bfd_asymbol_name (asym_ptr
));
4866 bfd_set_error (bfd_error_no_symbols
);
4873 "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n",
4874 (long) asym_ptr
, asym_ptr
->name
, idx
, flags
,
4875 elf_symbol_flags (flags
));
4883 /* Copy private BFD data. This copies any program header information. */
4886 copy_private_bfd_data (bfd
*ibfd
, bfd
*obfd
)
4888 Elf_Internal_Ehdr
*iehdr
;
4889 struct elf_segment_map
*map
;
4890 struct elf_segment_map
*map_first
;
4891 struct elf_segment_map
**pointer_to_map
;
4892 Elf_Internal_Phdr
*segment
;
4895 unsigned int num_segments
;
4896 bfd_boolean phdr_included
= FALSE
;
4897 bfd_vma maxpagesize
;
4898 struct elf_segment_map
*phdr_adjust_seg
= NULL
;
4899 unsigned int phdr_adjust_num
= 0;
4900 const struct elf_backend_data
*bed
;
4902 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
4903 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
4906 if (elf_tdata (ibfd
)->phdr
== NULL
)
4909 bed
= get_elf_backend_data (ibfd
);
4910 iehdr
= elf_elfheader (ibfd
);
4913 pointer_to_map
= &map_first
;
4915 num_segments
= elf_elfheader (ibfd
)->e_phnum
;
4916 maxpagesize
= get_elf_backend_data (obfd
)->maxpagesize
;
4918 /* Returns the end address of the segment + 1. */
4919 #define SEGMENT_END(segment, start) \
4920 (start + (segment->p_memsz > segment->p_filesz \
4921 ? segment->p_memsz : segment->p_filesz))
4923 #define SECTION_SIZE(section, segment) \
4924 (((section->flags & (SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) \
4925 != SEC_THREAD_LOCAL || segment->p_type == PT_TLS) \
4926 ? section->size : 0)
4928 /* Returns TRUE if the given section is contained within
4929 the given segment. VMA addresses are compared. */
4930 #define IS_CONTAINED_BY_VMA(section, segment) \
4931 (section->vma >= segment->p_vaddr \
4932 && (section->vma + SECTION_SIZE (section, segment) \
4933 <= (SEGMENT_END (segment, segment->p_vaddr))))
4935 /* Returns TRUE if the given section is contained within
4936 the given segment. LMA addresses are compared. */
4937 #define IS_CONTAINED_BY_LMA(section, segment, base) \
4938 (section->lma >= base \
4939 && (section->lma + SECTION_SIZE (section, segment) \
4940 <= SEGMENT_END (segment, base)))
4942 /* Special case: corefile "NOTE" section containing regs, prpsinfo etc. */
4943 #define IS_COREFILE_NOTE(p, s) \
4944 (p->p_type == PT_NOTE \
4945 && bfd_get_format (ibfd) == bfd_core \
4946 && s->vma == 0 && s->lma == 0 \
4947 && (bfd_vma) s->filepos >= p->p_offset \
4948 && ((bfd_vma) s->filepos + s->size \
4949 <= p->p_offset + p->p_filesz))
4951 /* The complicated case when p_vaddr is 0 is to handle the Solaris
4952 linker, which generates a PT_INTERP section with p_vaddr and
4953 p_memsz set to 0. */
4954 #define IS_SOLARIS_PT_INTERP(p, s) \
4956 && p->p_paddr == 0 \
4957 && p->p_memsz == 0 \
4958 && p->p_filesz > 0 \
4959 && (s->flags & SEC_HAS_CONTENTS) != 0 \
4961 && (bfd_vma) s->filepos >= p->p_offset \
4962 && ((bfd_vma) s->filepos + s->size \
4963 <= p->p_offset + p->p_filesz))
4965 /* Decide if the given section should be included in the given segment.
4966 A section will be included if:
4967 1. It is within the address space of the segment -- we use the LMA
4968 if that is set for the segment and the VMA otherwise,
4969 2. It is an allocated segment,
4970 3. There is an output section associated with it,
4971 4. The section has not already been allocated to a previous segment.
4972 5. PT_GNU_STACK segments do not include any sections.
4973 6. PT_TLS segment includes only SHF_TLS sections.
4974 7. SHF_TLS sections are only in PT_TLS or PT_LOAD segments.
4975 8. PT_DYNAMIC should not contain empty sections at the beginning
4976 (with the possible exception of .dynamic). */
4977 #define INCLUDE_SECTION_IN_SEGMENT(section, segment, bed) \
4978 ((((segment->p_paddr \
4979 ? IS_CONTAINED_BY_LMA (section, segment, segment->p_paddr) \
4980 : IS_CONTAINED_BY_VMA (section, segment)) \
4981 && (section->flags & SEC_ALLOC) != 0) \
4982 || IS_COREFILE_NOTE (segment, section)) \
4983 && section->output_section != NULL \
4984 && segment->p_type != PT_GNU_STACK \
4985 && (segment->p_type != PT_TLS \
4986 || (section->flags & SEC_THREAD_LOCAL)) \
4987 && (segment->p_type == PT_LOAD \
4988 || segment->p_type == PT_TLS \
4989 || (section->flags & SEC_THREAD_LOCAL) == 0) \
4990 && (segment->p_type != PT_DYNAMIC \
4991 || SECTION_SIZE (section, segment) > 0 \
4992 || (segment->p_paddr \
4993 ? segment->p_paddr != section->lma \
4994 : segment->p_vaddr != section->vma) \
4995 || (strcmp (bfd_get_section_name (ibfd, section), ".dynamic") \
4997 && ! section->segment_mark)
4999 /* Returns TRUE iff seg1 starts after the end of seg2. */
5000 #define SEGMENT_AFTER_SEGMENT(seg1, seg2, field) \
5001 (seg1->field >= SEGMENT_END (seg2, seg2->field))
5003 /* Returns TRUE iff seg1 and seg2 overlap. Segments overlap iff both
5004 their VMA address ranges and their LMA address ranges overlap.
5005 It is possible to have overlapping VMA ranges without overlapping LMA
5006 ranges. RedBoot images for example can have both .data and .bss mapped
5007 to the same VMA range, but with the .data section mapped to a different
5009 #define SEGMENT_OVERLAPS(seg1, seg2) \
5010 ( !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_vaddr) \
5011 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_vaddr)) \
5012 && !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_paddr) \
5013 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_paddr)))
5015 /* Initialise the segment mark field. */
5016 for (section
= ibfd
->sections
; section
!= NULL
; section
= section
->next
)
5017 section
->segment_mark
= FALSE
;
5019 /* Scan through the segments specified in the program header
5020 of the input BFD. For this first scan we look for overlaps
5021 in the loadable segments. These can be created by weird
5022 parameters to objcopy. Also, fix some solaris weirdness. */
5023 for (i
= 0, segment
= elf_tdata (ibfd
)->phdr
;
5028 Elf_Internal_Phdr
*segment2
;
5030 if (segment
->p_type
== PT_INTERP
)
5031 for (section
= ibfd
->sections
; section
; section
= section
->next
)
5032 if (IS_SOLARIS_PT_INTERP (segment
, section
))
5034 /* Mininal change so that the normal section to segment
5035 assignment code will work. */
5036 segment
->p_vaddr
= section
->vma
;
5040 if (segment
->p_type
!= PT_LOAD
)
5043 /* Determine if this segment overlaps any previous segments. */
5044 for (j
= 0, segment2
= elf_tdata (ibfd
)->phdr
; j
< i
; j
++, segment2
++)
5046 bfd_signed_vma extra_length
;
5048 if (segment2
->p_type
!= PT_LOAD
5049 || ! SEGMENT_OVERLAPS (segment
, segment2
))
5052 /* Merge the two segments together. */
5053 if (segment2
->p_vaddr
< segment
->p_vaddr
)
5055 /* Extend SEGMENT2 to include SEGMENT and then delete
5058 SEGMENT_END (segment
, segment
->p_vaddr
)
5059 - SEGMENT_END (segment2
, segment2
->p_vaddr
);
5061 if (extra_length
> 0)
5063 segment2
->p_memsz
+= extra_length
;
5064 segment2
->p_filesz
+= extra_length
;
5067 segment
->p_type
= PT_NULL
;
5069 /* Since we have deleted P we must restart the outer loop. */
5071 segment
= elf_tdata (ibfd
)->phdr
;
5076 /* Extend SEGMENT to include SEGMENT2 and then delete
5079 SEGMENT_END (segment2
, segment2
->p_vaddr
)
5080 - SEGMENT_END (segment
, segment
->p_vaddr
);
5082 if (extra_length
> 0)
5084 segment
->p_memsz
+= extra_length
;
5085 segment
->p_filesz
+= extra_length
;
5088 segment2
->p_type
= PT_NULL
;
5093 /* The second scan attempts to assign sections to segments. */
5094 for (i
= 0, segment
= elf_tdata (ibfd
)->phdr
;
5098 unsigned int section_count
;
5099 asection
** sections
;
5100 asection
* output_section
;
5102 bfd_vma matching_lma
;
5103 bfd_vma suggested_lma
;
5107 if (segment
->p_type
== PT_NULL
)
5110 /* Compute how many sections might be placed into this segment. */
5111 for (section
= ibfd
->sections
, section_count
= 0;
5113 section
= section
->next
)
5114 if (INCLUDE_SECTION_IN_SEGMENT (section
, segment
, bed
))
5117 /* Allocate a segment map big enough to contain
5118 all of the sections we have selected. */
5119 amt
= sizeof (struct elf_segment_map
);
5120 amt
+= ((bfd_size_type
) section_count
- 1) * sizeof (asection
*);
5121 map
= bfd_alloc (obfd
, amt
);
5125 /* Initialise the fields of the segment map. Default to
5126 using the physical address of the segment in the input BFD. */
5128 map
->p_type
= segment
->p_type
;
5129 map
->p_flags
= segment
->p_flags
;
5130 map
->p_flags_valid
= 1;
5131 map
->p_paddr
= segment
->p_paddr
;
5132 map
->p_paddr_valid
= 1;
5134 /* Determine if this segment contains the ELF file header
5135 and if it contains the program headers themselves. */
5136 map
->includes_filehdr
= (segment
->p_offset
== 0
5137 && segment
->p_filesz
>= iehdr
->e_ehsize
);
5139 map
->includes_phdrs
= 0;
5141 if (! phdr_included
|| segment
->p_type
!= PT_LOAD
)
5143 map
->includes_phdrs
=
5144 (segment
->p_offset
<= (bfd_vma
) iehdr
->e_phoff
5145 && (segment
->p_offset
+ segment
->p_filesz
5146 >= ((bfd_vma
) iehdr
->e_phoff
5147 + iehdr
->e_phnum
* iehdr
->e_phentsize
)));
5149 if (segment
->p_type
== PT_LOAD
&& map
->includes_phdrs
)
5150 phdr_included
= TRUE
;
5153 if (section_count
== 0)
5155 /* Special segments, such as the PT_PHDR segment, may contain
5156 no sections, but ordinary, loadable segments should contain
5157 something. They are allowed by the ELF spec however, so only
5158 a warning is produced. */
5159 if (segment
->p_type
== PT_LOAD
)
5160 (*_bfd_error_handler
)
5161 (_("%B: warning: Empty loadable segment detected, is this intentional ?\n"),
5165 *pointer_to_map
= map
;
5166 pointer_to_map
= &map
->next
;
5171 /* Now scan the sections in the input BFD again and attempt
5172 to add their corresponding output sections to the segment map.
5173 The problem here is how to handle an output section which has
5174 been moved (ie had its LMA changed). There are four possibilities:
5176 1. None of the sections have been moved.
5177 In this case we can continue to use the segment LMA from the
5180 2. All of the sections have been moved by the same amount.
5181 In this case we can change the segment's LMA to match the LMA
5182 of the first section.
5184 3. Some of the sections have been moved, others have not.
5185 In this case those sections which have not been moved can be
5186 placed in the current segment which will have to have its size,
5187 and possibly its LMA changed, and a new segment or segments will
5188 have to be created to contain the other sections.
5190 4. The sections have been moved, but not by the same amount.
5191 In this case we can change the segment's LMA to match the LMA
5192 of the first section and we will have to create a new segment
5193 or segments to contain the other sections.
5195 In order to save time, we allocate an array to hold the section
5196 pointers that we are interested in. As these sections get assigned
5197 to a segment, they are removed from this array. */
5199 /* Gcc 2.96 miscompiles this code on mips. Don't do casting here
5200 to work around this long long bug. */
5201 amt
= section_count
* sizeof (asection
*);
5202 sections
= bfd_malloc (amt
);
5203 if (sections
== NULL
)
5206 /* Step One: Scan for segment vs section LMA conflicts.
5207 Also add the sections to the section array allocated above.
5208 Also add the sections to the current segment. In the common
5209 case, where the sections have not been moved, this means that
5210 we have completely filled the segment, and there is nothing
5216 for (j
= 0, section
= ibfd
->sections
;
5218 section
= section
->next
)
5220 if (INCLUDE_SECTION_IN_SEGMENT (section
, segment
, bed
))
5222 output_section
= section
->output_section
;
5224 sections
[j
++] = section
;
5226 /* The Solaris native linker always sets p_paddr to 0.
5227 We try to catch that case here, and set it to the
5228 correct value. Note - some backends require that
5229 p_paddr be left as zero. */
5230 if (segment
->p_paddr
== 0
5231 && segment
->p_vaddr
!= 0
5232 && (! bed
->want_p_paddr_set_to_zero
)
5234 && output_section
->lma
!= 0
5235 && (output_section
->vma
== (segment
->p_vaddr
5236 + (map
->includes_filehdr
5239 + (map
->includes_phdrs
5241 * iehdr
->e_phentsize
)
5243 map
->p_paddr
= segment
->p_vaddr
;
5245 /* Match up the physical address of the segment with the
5246 LMA address of the output section. */
5247 if (IS_CONTAINED_BY_LMA (output_section
, segment
, map
->p_paddr
)
5248 || IS_COREFILE_NOTE (segment
, section
)
5249 || (bed
->want_p_paddr_set_to_zero
&&
5250 IS_CONTAINED_BY_VMA (output_section
, segment
))
5253 if (matching_lma
== 0)
5254 matching_lma
= output_section
->lma
;
5256 /* We assume that if the section fits within the segment
5257 then it does not overlap any other section within that
5259 map
->sections
[isec
++] = output_section
;
5261 else if (suggested_lma
== 0)
5262 suggested_lma
= output_section
->lma
;
5266 BFD_ASSERT (j
== section_count
);
5268 /* Step Two: Adjust the physical address of the current segment,
5270 if (isec
== section_count
)
5272 /* All of the sections fitted within the segment as currently
5273 specified. This is the default case. Add the segment to
5274 the list of built segments and carry on to process the next
5275 program header in the input BFD. */
5276 map
->count
= section_count
;
5277 *pointer_to_map
= map
;
5278 pointer_to_map
= &map
->next
;
5285 if (matching_lma
!= 0)
5287 /* At least one section fits inside the current segment.
5288 Keep it, but modify its physical address to match the
5289 LMA of the first section that fitted. */
5290 map
->p_paddr
= matching_lma
;
5294 /* None of the sections fitted inside the current segment.
5295 Change the current segment's physical address to match
5296 the LMA of the first section. */
5297 map
->p_paddr
= suggested_lma
;
5300 /* Offset the segment physical address from the lma
5301 to allow for space taken up by elf headers. */
5302 if (map
->includes_filehdr
)
5303 map
->p_paddr
-= iehdr
->e_ehsize
;
5305 if (map
->includes_phdrs
)
5307 map
->p_paddr
-= iehdr
->e_phnum
* iehdr
->e_phentsize
;
5309 /* iehdr->e_phnum is just an estimate of the number
5310 of program headers that we will need. Make a note
5311 here of the number we used and the segment we chose
5312 to hold these headers, so that we can adjust the
5313 offset when we know the correct value. */
5314 phdr_adjust_num
= iehdr
->e_phnum
;
5315 phdr_adjust_seg
= map
;
5319 /* Step Three: Loop over the sections again, this time assigning
5320 those that fit to the current segment and removing them from the
5321 sections array; but making sure not to leave large gaps. Once all
5322 possible sections have been assigned to the current segment it is
5323 added to the list of built segments and if sections still remain
5324 to be assigned, a new segment is constructed before repeating
5332 /* Fill the current segment with sections that fit. */
5333 for (j
= 0; j
< section_count
; j
++)
5335 section
= sections
[j
];
5337 if (section
== NULL
)
5340 output_section
= section
->output_section
;
5342 BFD_ASSERT (output_section
!= NULL
);
5344 if (IS_CONTAINED_BY_LMA (output_section
, segment
, map
->p_paddr
)
5345 || IS_COREFILE_NOTE (segment
, section
))
5347 if (map
->count
== 0)
5349 /* If the first section in a segment does not start at
5350 the beginning of the segment, then something is
5352 if (output_section
->lma
!=
5354 + (map
->includes_filehdr
? iehdr
->e_ehsize
: 0)
5355 + (map
->includes_phdrs
5356 ? iehdr
->e_phnum
* iehdr
->e_phentsize
5362 asection
* prev_sec
;
5364 prev_sec
= map
->sections
[map
->count
- 1];
5366 /* If the gap between the end of the previous section
5367 and the start of this section is more than
5368 maxpagesize then we need to start a new segment. */
5369 if ((BFD_ALIGN (prev_sec
->lma
+ prev_sec
->size
,
5371 < BFD_ALIGN (output_section
->lma
, maxpagesize
))
5372 || ((prev_sec
->lma
+ prev_sec
->size
)
5373 > output_section
->lma
))
5375 if (suggested_lma
== 0)
5376 suggested_lma
= output_section
->lma
;
5382 map
->sections
[map
->count
++] = output_section
;
5385 section
->segment_mark
= TRUE
;
5387 else if (suggested_lma
== 0)
5388 suggested_lma
= output_section
->lma
;
5391 BFD_ASSERT (map
->count
> 0);
5393 /* Add the current segment to the list of built segments. */
5394 *pointer_to_map
= map
;
5395 pointer_to_map
= &map
->next
;
5397 if (isec
< section_count
)
5399 /* We still have not allocated all of the sections to
5400 segments. Create a new segment here, initialise it
5401 and carry on looping. */
5402 amt
= sizeof (struct elf_segment_map
);
5403 amt
+= ((bfd_size_type
) section_count
- 1) * sizeof (asection
*);
5404 map
= bfd_alloc (obfd
, amt
);
5411 /* Initialise the fields of the segment map. Set the physical
5412 physical address to the LMA of the first section that has
5413 not yet been assigned. */
5415 map
->p_type
= segment
->p_type
;
5416 map
->p_flags
= segment
->p_flags
;
5417 map
->p_flags_valid
= 1;
5418 map
->p_paddr
= suggested_lma
;
5419 map
->p_paddr_valid
= 1;
5420 map
->includes_filehdr
= 0;
5421 map
->includes_phdrs
= 0;
5424 while (isec
< section_count
);
5429 /* The Solaris linker creates program headers in which all the
5430 p_paddr fields are zero. When we try to objcopy or strip such a
5431 file, we get confused. Check for this case, and if we find it
5432 reset the p_paddr_valid fields. */
5433 for (map
= map_first
; map
!= NULL
; map
= map
->next
)
5434 if (map
->p_paddr
!= 0)
5437 for (map
= map_first
; map
!= NULL
; map
= map
->next
)
5438 map
->p_paddr_valid
= 0;
5440 elf_tdata (obfd
)->segment_map
= map_first
;
5442 /* If we had to estimate the number of program headers that were
5443 going to be needed, then check our estimate now and adjust
5444 the offset if necessary. */
5445 if (phdr_adjust_seg
!= NULL
)
5449 for (count
= 0, map
= map_first
; map
!= NULL
; map
= map
->next
)
5452 if (count
> phdr_adjust_num
)
5453 phdr_adjust_seg
->p_paddr
5454 -= (count
- phdr_adjust_num
) * iehdr
->e_phentsize
;
5459 #undef IS_CONTAINED_BY_VMA
5460 #undef IS_CONTAINED_BY_LMA
5461 #undef IS_COREFILE_NOTE
5462 #undef IS_SOLARIS_PT_INTERP
5463 #undef INCLUDE_SECTION_IN_SEGMENT
5464 #undef SEGMENT_AFTER_SEGMENT
5465 #undef SEGMENT_OVERLAPS
5469 /* Copy private section information. This copies over the entsize
5470 field, and sometimes the info field. */
5473 _bfd_elf_copy_private_section_data (bfd
*ibfd
,
5478 Elf_Internal_Shdr
*ihdr
, *ohdr
;
5480 if (ibfd
->xvec
->flavour
!= bfd_target_elf_flavour
5481 || obfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
5484 ihdr
= &elf_section_data (isec
)->this_hdr
;
5485 ohdr
= &elf_section_data (osec
)->this_hdr
;
5487 ohdr
->sh_entsize
= ihdr
->sh_entsize
;
5489 if (ihdr
->sh_type
== SHT_SYMTAB
5490 || ihdr
->sh_type
== SHT_DYNSYM
5491 || ihdr
->sh_type
== SHT_GNU_verneed
5492 || ihdr
->sh_type
== SHT_GNU_verdef
)
5493 ohdr
->sh_info
= ihdr
->sh_info
;
5495 /* Set things up for objcopy. The output SHT_GROUP section will
5496 have its elf_next_in_group pointing back to the input group
5498 elf_next_in_group (osec
) = elf_next_in_group (isec
);
5499 elf_group_name (osec
) = elf_group_name (isec
);
5501 osec
->use_rela_p
= isec
->use_rela_p
;
5506 /* Copy private header information. */
5509 _bfd_elf_copy_private_header_data (bfd
*ibfd
, bfd
*obfd
)
5511 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
5512 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
5515 /* Copy over private BFD data if it has not already been copied.
5516 This must be done here, rather than in the copy_private_bfd_data
5517 entry point, because the latter is called after the section
5518 contents have been set, which means that the program headers have
5519 already been worked out. */
5520 if (elf_tdata (obfd
)->segment_map
== NULL
&& elf_tdata (ibfd
)->phdr
!= NULL
)
5522 if (! copy_private_bfd_data (ibfd
, obfd
))
5529 /* Copy private symbol information. If this symbol is in a section
5530 which we did not map into a BFD section, try to map the section
5531 index correctly. We use special macro definitions for the mapped
5532 section indices; these definitions are interpreted by the
5533 swap_out_syms function. */
5535 #define MAP_ONESYMTAB (SHN_HIOS + 1)
5536 #define MAP_DYNSYMTAB (SHN_HIOS + 2)
5537 #define MAP_STRTAB (SHN_HIOS + 3)
5538 #define MAP_SHSTRTAB (SHN_HIOS + 4)
5539 #define MAP_SYM_SHNDX (SHN_HIOS + 5)
5542 _bfd_elf_copy_private_symbol_data (bfd
*ibfd
,
5547 elf_symbol_type
*isym
, *osym
;
5549 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
5550 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
5553 isym
= elf_symbol_from (ibfd
, isymarg
);
5554 osym
= elf_symbol_from (obfd
, osymarg
);
5558 && bfd_is_abs_section (isym
->symbol
.section
))
5562 shndx
= isym
->internal_elf_sym
.st_shndx
;
5563 if (shndx
== elf_onesymtab (ibfd
))
5564 shndx
= MAP_ONESYMTAB
;
5565 else if (shndx
== elf_dynsymtab (ibfd
))
5566 shndx
= MAP_DYNSYMTAB
;
5567 else if (shndx
== elf_tdata (ibfd
)->strtab_section
)
5569 else if (shndx
== elf_tdata (ibfd
)->shstrtab_section
)
5570 shndx
= MAP_SHSTRTAB
;
5571 else if (shndx
== elf_tdata (ibfd
)->symtab_shndx_section
)
5572 shndx
= MAP_SYM_SHNDX
;
5573 osym
->internal_elf_sym
.st_shndx
= shndx
;
5579 /* Swap out the symbols. */
5582 swap_out_syms (bfd
*abfd
,
5583 struct bfd_strtab_hash
**sttp
,
5586 const struct elf_backend_data
*bed
;
5589 struct bfd_strtab_hash
*stt
;
5590 Elf_Internal_Shdr
*symtab_hdr
;
5591 Elf_Internal_Shdr
*symtab_shndx_hdr
;
5592 Elf_Internal_Shdr
*symstrtab_hdr
;
5593 bfd_byte
*outbound_syms
;
5594 bfd_byte
*outbound_shndx
;
5597 bfd_boolean name_local_sections
;
5599 if (!elf_map_symbols (abfd
))
5602 /* Dump out the symtabs. */
5603 stt
= _bfd_elf_stringtab_init ();
5607 bed
= get_elf_backend_data (abfd
);
5608 symcount
= bfd_get_symcount (abfd
);
5609 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
5610 symtab_hdr
->sh_type
= SHT_SYMTAB
;
5611 symtab_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
5612 symtab_hdr
->sh_size
= symtab_hdr
->sh_entsize
* (symcount
+ 1);
5613 symtab_hdr
->sh_info
= elf_num_locals (abfd
) + 1;
5614 symtab_hdr
->sh_addralign
= 1 << bed
->s
->log_file_align
;
5616 symstrtab_hdr
= &elf_tdata (abfd
)->strtab_hdr
;
5617 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
5619 amt
= (bfd_size_type
) (1 + symcount
) * bed
->s
->sizeof_sym
;
5620 outbound_syms
= bfd_alloc (abfd
, amt
);
5621 if (outbound_syms
== NULL
)
5623 _bfd_stringtab_free (stt
);
5626 symtab_hdr
->contents
= outbound_syms
;
5628 outbound_shndx
= NULL
;
5629 symtab_shndx_hdr
= &elf_tdata (abfd
)->symtab_shndx_hdr
;
5630 if (symtab_shndx_hdr
->sh_name
!= 0)
5632 amt
= (bfd_size_type
) (1 + symcount
) * sizeof (Elf_External_Sym_Shndx
);
5633 outbound_shndx
= bfd_zalloc (abfd
, amt
);
5634 if (outbound_shndx
== NULL
)
5636 _bfd_stringtab_free (stt
);
5640 symtab_shndx_hdr
->contents
= outbound_shndx
;
5641 symtab_shndx_hdr
->sh_type
= SHT_SYMTAB_SHNDX
;
5642 symtab_shndx_hdr
->sh_size
= amt
;
5643 symtab_shndx_hdr
->sh_addralign
= sizeof (Elf_External_Sym_Shndx
);
5644 symtab_shndx_hdr
->sh_entsize
= sizeof (Elf_External_Sym_Shndx
);
5647 /* Now generate the data (for "contents"). */
5649 /* Fill in zeroth symbol and swap it out. */
5650 Elf_Internal_Sym sym
;
5656 sym
.st_shndx
= SHN_UNDEF
;
5657 bed
->s
->swap_symbol_out (abfd
, &sym
, outbound_syms
, outbound_shndx
);
5658 outbound_syms
+= bed
->s
->sizeof_sym
;
5659 if (outbound_shndx
!= NULL
)
5660 outbound_shndx
+= sizeof (Elf_External_Sym_Shndx
);
5664 = (bed
->elf_backend_name_local_section_symbols
5665 && bed
->elf_backend_name_local_section_symbols (abfd
));
5667 syms
= bfd_get_outsymbols (abfd
);
5668 for (idx
= 0; idx
< symcount
; idx
++)
5670 Elf_Internal_Sym sym
;
5671 bfd_vma value
= syms
[idx
]->value
;
5672 elf_symbol_type
*type_ptr
;
5673 flagword flags
= syms
[idx
]->flags
;
5676 if (!name_local_sections
5677 && (flags
& (BSF_SECTION_SYM
| BSF_GLOBAL
)) == BSF_SECTION_SYM
)
5679 /* Local section symbols have no name. */
5684 sym
.st_name
= (unsigned long) _bfd_stringtab_add (stt
,
5687 if (sym
.st_name
== (unsigned long) -1)
5689 _bfd_stringtab_free (stt
);
5694 type_ptr
= elf_symbol_from (abfd
, syms
[idx
]);
5696 if ((flags
& BSF_SECTION_SYM
) == 0
5697 && bfd_is_com_section (syms
[idx
]->section
))
5699 /* ELF common symbols put the alignment into the `value' field,
5700 and the size into the `size' field. This is backwards from
5701 how BFD handles it, so reverse it here. */
5702 sym
.st_size
= value
;
5703 if (type_ptr
== NULL
5704 || type_ptr
->internal_elf_sym
.st_value
== 0)
5705 sym
.st_value
= value
>= 16 ? 16 : (1 << bfd_log2 (value
));
5707 sym
.st_value
= type_ptr
->internal_elf_sym
.st_value
;
5708 sym
.st_shndx
= _bfd_elf_section_from_bfd_section
5709 (abfd
, syms
[idx
]->section
);
5713 asection
*sec
= syms
[idx
]->section
;
5716 if (sec
->output_section
)
5718 value
+= sec
->output_offset
;
5719 sec
= sec
->output_section
;
5722 /* Don't add in the section vma for relocatable output. */
5723 if (! relocatable_p
)
5725 sym
.st_value
= value
;
5726 sym
.st_size
= type_ptr
? type_ptr
->internal_elf_sym
.st_size
: 0;
5728 if (bfd_is_abs_section (sec
)
5730 && type_ptr
->internal_elf_sym
.st_shndx
!= 0)
5732 /* This symbol is in a real ELF section which we did
5733 not create as a BFD section. Undo the mapping done
5734 by copy_private_symbol_data. */
5735 shndx
= type_ptr
->internal_elf_sym
.st_shndx
;
5739 shndx
= elf_onesymtab (abfd
);
5742 shndx
= elf_dynsymtab (abfd
);
5745 shndx
= elf_tdata (abfd
)->strtab_section
;
5748 shndx
= elf_tdata (abfd
)->shstrtab_section
;
5751 shndx
= elf_tdata (abfd
)->symtab_shndx_section
;
5759 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec
);
5765 /* Writing this would be a hell of a lot easier if
5766 we had some decent documentation on bfd, and
5767 knew what to expect of the library, and what to
5768 demand of applications. For example, it
5769 appears that `objcopy' might not set the
5770 section of a symbol to be a section that is
5771 actually in the output file. */
5772 sec2
= bfd_get_section_by_name (abfd
, sec
->name
);
5775 _bfd_error_handler (_("\
5776 Unable to find equivalent output section for symbol '%s' from section '%s'"),
5777 syms
[idx
]->name
? syms
[idx
]->name
: "<Local sym>",
5779 bfd_set_error (bfd_error_invalid_operation
);
5780 _bfd_stringtab_free (stt
);
5784 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec2
);
5785 BFD_ASSERT (shndx
!= -1);
5789 sym
.st_shndx
= shndx
;
5792 if ((flags
& BSF_THREAD_LOCAL
) != 0)
5794 else if ((flags
& BSF_FUNCTION
) != 0)
5796 else if ((flags
& BSF_OBJECT
) != 0)
5801 if (syms
[idx
]->section
->flags
& SEC_THREAD_LOCAL
)
5804 /* Processor-specific types. */
5805 if (type_ptr
!= NULL
5806 && bed
->elf_backend_get_symbol_type
)
5807 type
= ((*bed
->elf_backend_get_symbol_type
)
5808 (&type_ptr
->internal_elf_sym
, type
));
5810 if (flags
& BSF_SECTION_SYM
)
5812 if (flags
& BSF_GLOBAL
)
5813 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, STT_SECTION
);
5815 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_SECTION
);
5817 else if (bfd_is_com_section (syms
[idx
]->section
))
5818 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, type
);
5819 else if (bfd_is_und_section (syms
[idx
]->section
))
5820 sym
.st_info
= ELF_ST_INFO (((flags
& BSF_WEAK
)
5824 else if (flags
& BSF_FILE
)
5825 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FILE
);
5828 int bind
= STB_LOCAL
;
5830 if (flags
& BSF_LOCAL
)
5832 else if (flags
& BSF_WEAK
)
5834 else if (flags
& BSF_GLOBAL
)
5837 sym
.st_info
= ELF_ST_INFO (bind
, type
);
5840 if (type_ptr
!= NULL
)
5841 sym
.st_other
= type_ptr
->internal_elf_sym
.st_other
;
5845 bed
->s
->swap_symbol_out (abfd
, &sym
, outbound_syms
, outbound_shndx
);
5846 outbound_syms
+= bed
->s
->sizeof_sym
;
5847 if (outbound_shndx
!= NULL
)
5848 outbound_shndx
+= sizeof (Elf_External_Sym_Shndx
);
5852 symstrtab_hdr
->sh_size
= _bfd_stringtab_size (stt
);
5853 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
5855 symstrtab_hdr
->sh_flags
= 0;
5856 symstrtab_hdr
->sh_addr
= 0;
5857 symstrtab_hdr
->sh_entsize
= 0;
5858 symstrtab_hdr
->sh_link
= 0;
5859 symstrtab_hdr
->sh_info
= 0;
5860 symstrtab_hdr
->sh_addralign
= 1;
5865 /* Return the number of bytes required to hold the symtab vector.
5867 Note that we base it on the count plus 1, since we will null terminate
5868 the vector allocated based on this size. However, the ELF symbol table
5869 always has a dummy entry as symbol #0, so it ends up even. */
5872 _bfd_elf_get_symtab_upper_bound (bfd
*abfd
)
5876 Elf_Internal_Shdr
*hdr
= &elf_tdata (abfd
)->symtab_hdr
;
5878 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
5879 symtab_size
= (symcount
+ 1) * (sizeof (asymbol
*));
5881 symtab_size
-= sizeof (asymbol
*);
5887 _bfd_elf_get_dynamic_symtab_upper_bound (bfd
*abfd
)
5891 Elf_Internal_Shdr
*hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
5893 if (elf_dynsymtab (abfd
) == 0)
5895 bfd_set_error (bfd_error_invalid_operation
);
5899 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
5900 symtab_size
= (symcount
+ 1) * (sizeof (asymbol
*));
5902 symtab_size
-= sizeof (asymbol
*);
5908 _bfd_elf_get_reloc_upper_bound (bfd
*abfd ATTRIBUTE_UNUSED
,
5911 return (asect
->reloc_count
+ 1) * sizeof (arelent
*);
5914 /* Canonicalize the relocs. */
5917 _bfd_elf_canonicalize_reloc (bfd
*abfd
,
5924 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
5926 if (! bed
->s
->slurp_reloc_table (abfd
, section
, symbols
, FALSE
))
5929 tblptr
= section
->relocation
;
5930 for (i
= 0; i
< section
->reloc_count
; i
++)
5931 *relptr
++ = tblptr
++;
5935 return section
->reloc_count
;
5939 _bfd_elf_canonicalize_symtab (bfd
*abfd
, asymbol
**allocation
)
5941 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
5942 long symcount
= bed
->s
->slurp_symbol_table (abfd
, allocation
, FALSE
);
5945 bfd_get_symcount (abfd
) = symcount
;
5950 _bfd_elf_canonicalize_dynamic_symtab (bfd
*abfd
,
5951 asymbol
**allocation
)
5953 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
5954 long symcount
= bed
->s
->slurp_symbol_table (abfd
, allocation
, TRUE
);
5957 bfd_get_dynamic_symcount (abfd
) = symcount
;
5961 /* Return the size required for the dynamic reloc entries. Any loadable
5962 section that was actually installed in the BFD, and has type SHT_REL
5963 or SHT_RELA, and uses the dynamic symbol table, is considered to be a
5964 dynamic reloc section. */
5967 _bfd_elf_get_dynamic_reloc_upper_bound (bfd
*abfd
)
5972 if (elf_dynsymtab (abfd
) == 0)
5974 bfd_set_error (bfd_error_invalid_operation
);
5978 ret
= sizeof (arelent
*);
5979 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
5980 if ((s
->flags
& SEC_LOAD
) != 0
5981 && elf_section_data (s
)->this_hdr
.sh_link
== elf_dynsymtab (abfd
)
5982 && (elf_section_data (s
)->this_hdr
.sh_type
== SHT_REL
5983 || elf_section_data (s
)->this_hdr
.sh_type
== SHT_RELA
))
5984 ret
+= ((s
->size
/ elf_section_data (s
)->this_hdr
.sh_entsize
)
5985 * sizeof (arelent
*));
5990 /* Canonicalize the dynamic relocation entries. Note that we return the
5991 dynamic relocations as a single block, although they are actually
5992 associated with particular sections; the interface, which was
5993 designed for SunOS style shared libraries, expects that there is only
5994 one set of dynamic relocs. Any loadable section that was actually
5995 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses the
5996 dynamic symbol table, is considered to be a dynamic reloc section. */
5999 _bfd_elf_canonicalize_dynamic_reloc (bfd
*abfd
,
6003 bfd_boolean (*slurp_relocs
) (bfd
*, asection
*, asymbol
**, bfd_boolean
);
6007 if (elf_dynsymtab (abfd
) == 0)
6009 bfd_set_error (bfd_error_invalid_operation
);
6013 slurp_relocs
= get_elf_backend_data (abfd
)->s
->slurp_reloc_table
;
6015 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
6017 if ((s
->flags
& SEC_LOAD
) != 0
6018 && elf_section_data (s
)->this_hdr
.sh_link
== elf_dynsymtab (abfd
)
6019 && (elf_section_data (s
)->this_hdr
.sh_type
== SHT_REL
6020 || elf_section_data (s
)->this_hdr
.sh_type
== SHT_RELA
))
6025 if (! (*slurp_relocs
) (abfd
, s
, syms
, TRUE
))
6027 count
= s
->size
/ elf_section_data (s
)->this_hdr
.sh_entsize
;
6029 for (i
= 0; i
< count
; i
++)
6040 /* Read in the version information. */
6043 _bfd_elf_slurp_version_tables (bfd
*abfd
, bfd_boolean default_imported_symver
)
6045 bfd_byte
*contents
= NULL
;
6047 unsigned int freeidx
= 0;
6049 if (elf_dynverref (abfd
) != 0)
6051 Elf_Internal_Shdr
*hdr
;
6052 Elf_External_Verneed
*everneed
;
6053 Elf_Internal_Verneed
*iverneed
;
6056 hdr
= &elf_tdata (abfd
)->dynverref_hdr
;
6058 amt
= (bfd_size_type
) hdr
->sh_info
* sizeof (Elf_Internal_Verneed
);
6059 elf_tdata (abfd
)->verref
= bfd_zalloc (abfd
, amt
);
6060 if (elf_tdata (abfd
)->verref
== NULL
)
6063 elf_tdata (abfd
)->cverrefs
= hdr
->sh_info
;
6065 contents
= bfd_malloc (hdr
->sh_size
);
6066 if (contents
== NULL
)
6068 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
6069 || bfd_bread (contents
, hdr
->sh_size
, abfd
) != hdr
->sh_size
)
6072 everneed
= (Elf_External_Verneed
*) contents
;
6073 iverneed
= elf_tdata (abfd
)->verref
;
6074 for (i
= 0; i
< hdr
->sh_info
; i
++, iverneed
++)
6076 Elf_External_Vernaux
*evernaux
;
6077 Elf_Internal_Vernaux
*ivernaux
;
6080 _bfd_elf_swap_verneed_in (abfd
, everneed
, iverneed
);
6082 iverneed
->vn_bfd
= abfd
;
6084 iverneed
->vn_filename
=
6085 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
6087 if (iverneed
->vn_filename
== NULL
)
6090 amt
= iverneed
->vn_cnt
;
6091 amt
*= sizeof (Elf_Internal_Vernaux
);
6092 iverneed
->vn_auxptr
= bfd_alloc (abfd
, amt
);
6094 evernaux
= ((Elf_External_Vernaux
*)
6095 ((bfd_byte
*) everneed
+ iverneed
->vn_aux
));
6096 ivernaux
= iverneed
->vn_auxptr
;
6097 for (j
= 0; j
< iverneed
->vn_cnt
; j
++, ivernaux
++)
6099 _bfd_elf_swap_vernaux_in (abfd
, evernaux
, ivernaux
);
6101 ivernaux
->vna_nodename
=
6102 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
6103 ivernaux
->vna_name
);
6104 if (ivernaux
->vna_nodename
== NULL
)
6107 if (j
+ 1 < iverneed
->vn_cnt
)
6108 ivernaux
->vna_nextptr
= ivernaux
+ 1;
6110 ivernaux
->vna_nextptr
= NULL
;
6112 evernaux
= ((Elf_External_Vernaux
*)
6113 ((bfd_byte
*) evernaux
+ ivernaux
->vna_next
));
6115 if (ivernaux
->vna_other
> freeidx
)
6116 freeidx
= ivernaux
->vna_other
;
6119 if (i
+ 1 < hdr
->sh_info
)
6120 iverneed
->vn_nextref
= iverneed
+ 1;
6122 iverneed
->vn_nextref
= NULL
;
6124 everneed
= ((Elf_External_Verneed
*)
6125 ((bfd_byte
*) everneed
+ iverneed
->vn_next
));
6132 if (elf_dynverdef (abfd
) != 0)
6134 Elf_Internal_Shdr
*hdr
;
6135 Elf_External_Verdef
*everdef
;
6136 Elf_Internal_Verdef
*iverdef
;
6137 Elf_Internal_Verdef
*iverdefarr
;
6138 Elf_Internal_Verdef iverdefmem
;
6140 unsigned int maxidx
;
6142 hdr
= &elf_tdata (abfd
)->dynverdef_hdr
;
6144 contents
= bfd_malloc (hdr
->sh_size
);
6145 if (contents
== NULL
)
6147 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
6148 || bfd_bread (contents
, hdr
->sh_size
, abfd
) != hdr
->sh_size
)
6151 /* We know the number of entries in the section but not the maximum
6152 index. Therefore we have to run through all entries and find
6154 everdef
= (Elf_External_Verdef
*) contents
;
6156 for (i
= 0; i
< hdr
->sh_info
; ++i
)
6158 _bfd_elf_swap_verdef_in (abfd
, everdef
, &iverdefmem
);
6160 if ((iverdefmem
.vd_ndx
& ((unsigned) VERSYM_VERSION
)) > maxidx
)
6161 maxidx
= iverdefmem
.vd_ndx
& ((unsigned) VERSYM_VERSION
);
6163 everdef
= ((Elf_External_Verdef
*)
6164 ((bfd_byte
*) everdef
+ iverdefmem
.vd_next
));
6167 if (default_imported_symver
)
6169 if (freeidx
> maxidx
)
6174 amt
= (bfd_size_type
) maxidx
* sizeof (Elf_Internal_Verdef
);
6175 elf_tdata (abfd
)->verdef
= bfd_zalloc (abfd
, amt
);
6176 if (elf_tdata (abfd
)->verdef
== NULL
)
6179 elf_tdata (abfd
)->cverdefs
= maxidx
;
6181 everdef
= (Elf_External_Verdef
*) contents
;
6182 iverdefarr
= elf_tdata (abfd
)->verdef
;
6183 for (i
= 0; i
< hdr
->sh_info
; i
++)
6185 Elf_External_Verdaux
*everdaux
;
6186 Elf_Internal_Verdaux
*iverdaux
;
6189 _bfd_elf_swap_verdef_in (abfd
, everdef
, &iverdefmem
);
6191 iverdef
= &iverdefarr
[(iverdefmem
.vd_ndx
& VERSYM_VERSION
) - 1];
6192 memcpy (iverdef
, &iverdefmem
, sizeof (Elf_Internal_Verdef
));
6194 iverdef
->vd_bfd
= abfd
;
6196 amt
= (bfd_size_type
) iverdef
->vd_cnt
* sizeof (Elf_Internal_Verdaux
);
6197 iverdef
->vd_auxptr
= bfd_alloc (abfd
, amt
);
6198 if (iverdef
->vd_auxptr
== NULL
)
6201 everdaux
= ((Elf_External_Verdaux
*)
6202 ((bfd_byte
*) everdef
+ iverdef
->vd_aux
));
6203 iverdaux
= iverdef
->vd_auxptr
;
6204 for (j
= 0; j
< iverdef
->vd_cnt
; j
++, iverdaux
++)
6206 _bfd_elf_swap_verdaux_in (abfd
, everdaux
, iverdaux
);
6208 iverdaux
->vda_nodename
=
6209 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
6210 iverdaux
->vda_name
);
6211 if (iverdaux
->vda_nodename
== NULL
)
6214 if (j
+ 1 < iverdef
->vd_cnt
)
6215 iverdaux
->vda_nextptr
= iverdaux
+ 1;
6217 iverdaux
->vda_nextptr
= NULL
;
6219 everdaux
= ((Elf_External_Verdaux
*)
6220 ((bfd_byte
*) everdaux
+ iverdaux
->vda_next
));
6223 iverdef
->vd_nodename
= iverdef
->vd_auxptr
->vda_nodename
;
6225 if (i
+ 1 < hdr
->sh_info
)
6226 iverdef
->vd_nextdef
= iverdef
+ 1;
6228 iverdef
->vd_nextdef
= NULL
;
6230 everdef
= ((Elf_External_Verdef
*)
6231 ((bfd_byte
*) everdef
+ iverdef
->vd_next
));
6237 else if (default_imported_symver
)
6244 amt
= (bfd_size_type
) freeidx
* sizeof (Elf_Internal_Verdef
);
6245 elf_tdata (abfd
)->verdef
= bfd_zalloc (abfd
, amt
);
6246 if (elf_tdata (abfd
)->verdef
== NULL
)
6249 elf_tdata (abfd
)->cverdefs
= freeidx
;
6252 /* Create a default version based on the soname. */
6253 if (default_imported_symver
)
6255 Elf_Internal_Verdef
*iverdef
;
6256 Elf_Internal_Verdaux
*iverdaux
;
6258 iverdef
= &elf_tdata (abfd
)->verdef
[freeidx
- 1];;
6260 iverdef
->vd_version
= VER_DEF_CURRENT
;
6261 iverdef
->vd_flags
= 0;
6262 iverdef
->vd_ndx
= freeidx
;
6263 iverdef
->vd_cnt
= 1;
6265 iverdef
->vd_bfd
= abfd
;
6267 iverdef
->vd_nodename
= bfd_elf_get_dt_soname (abfd
);
6268 if (iverdef
->vd_nodename
== NULL
)
6270 iverdef
->vd_nextdef
= NULL
;
6271 amt
= (bfd_size_type
) sizeof (Elf_Internal_Verdaux
);
6272 iverdef
->vd_auxptr
= bfd_alloc (abfd
, amt
);
6274 iverdaux
= iverdef
->vd_auxptr
;
6275 iverdaux
->vda_nodename
= iverdef
->vd_nodename
;
6276 iverdaux
->vda_nextptr
= NULL
;
6282 if (contents
!= NULL
)
6288 _bfd_elf_make_empty_symbol (bfd
*abfd
)
6290 elf_symbol_type
*newsym
;
6291 bfd_size_type amt
= sizeof (elf_symbol_type
);
6293 newsym
= bfd_zalloc (abfd
, amt
);
6298 newsym
->symbol
.the_bfd
= abfd
;
6299 return &newsym
->symbol
;
6304 _bfd_elf_get_symbol_info (bfd
*abfd ATTRIBUTE_UNUSED
,
6308 bfd_symbol_info (symbol
, ret
);
6311 /* Return whether a symbol name implies a local symbol. Most targets
6312 use this function for the is_local_label_name entry point, but some
6316 _bfd_elf_is_local_label_name (bfd
*abfd ATTRIBUTE_UNUSED
,
6319 /* Normal local symbols start with ``.L''. */
6320 if (name
[0] == '.' && name
[1] == 'L')
6323 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
6324 DWARF debugging symbols starting with ``..''. */
6325 if (name
[0] == '.' && name
[1] == '.')
6328 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
6329 emitting DWARF debugging output. I suspect this is actually a
6330 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
6331 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
6332 underscore to be emitted on some ELF targets). For ease of use,
6333 we treat such symbols as local. */
6334 if (name
[0] == '_' && name
[1] == '.' && name
[2] == 'L' && name
[3] == '_')
6341 _bfd_elf_get_lineno (bfd
*abfd ATTRIBUTE_UNUSED
,
6342 asymbol
*symbol ATTRIBUTE_UNUSED
)
6349 _bfd_elf_set_arch_mach (bfd
*abfd
,
6350 enum bfd_architecture arch
,
6351 unsigned long machine
)
6353 /* If this isn't the right architecture for this backend, and this
6354 isn't the generic backend, fail. */
6355 if (arch
!= get_elf_backend_data (abfd
)->arch
6356 && arch
!= bfd_arch_unknown
6357 && get_elf_backend_data (abfd
)->arch
!= bfd_arch_unknown
)
6360 return bfd_default_set_arch_mach (abfd
, arch
, machine
);
6363 /* Find the function to a particular section and offset,
6364 for error reporting. */
6367 elf_find_function (bfd
*abfd ATTRIBUTE_UNUSED
,
6371 const char **filename_ptr
,
6372 const char **functionname_ptr
)
6374 const char *filename
;
6375 asymbol
*func
, *file
;
6378 /* ??? Given multiple file symbols, it is impossible to reliably
6379 choose the right file name for global symbols. File symbols are
6380 local symbols, and thus all file symbols must sort before any
6381 global symbols. The ELF spec may be interpreted to say that a
6382 file symbol must sort before other local symbols, but currently
6383 ld -r doesn't do this. So, for ld -r output, it is possible to
6384 make a better choice of file name for local symbols by ignoring
6385 file symbols appearing after a given local symbol. */
6386 enum { nothing_seen
, symbol_seen
, file_after_symbol_seen
} state
;
6392 state
= nothing_seen
;
6394 for (p
= symbols
; *p
!= NULL
; p
++)
6398 q
= (elf_symbol_type
*) *p
;
6400 switch (ELF_ST_TYPE (q
->internal_elf_sym
.st_info
))
6406 if (state
== symbol_seen
)
6407 state
= file_after_symbol_seen
;
6413 if (bfd_get_section (&q
->symbol
) == section
6414 && q
->symbol
.value
>= low_func
6415 && q
->symbol
.value
<= offset
)
6417 func
= (asymbol
*) q
;
6418 low_func
= q
->symbol
.value
;
6421 else if (ELF_ST_BIND (q
->internal_elf_sym
.st_info
) != STB_LOCAL
6422 && state
== file_after_symbol_seen
)
6425 filename
= bfd_asymbol_name (file
);
6429 if (state
== nothing_seen
)
6430 state
= symbol_seen
;
6437 *filename_ptr
= filename
;
6438 if (functionname_ptr
)
6439 *functionname_ptr
= bfd_asymbol_name (func
);
6444 /* Find the nearest line to a particular section and offset,
6445 for error reporting. */
6448 _bfd_elf_find_nearest_line (bfd
*abfd
,
6452 const char **filename_ptr
,
6453 const char **functionname_ptr
,
6454 unsigned int *line_ptr
)
6458 if (_bfd_dwarf1_find_nearest_line (abfd
, section
, symbols
, offset
,
6459 filename_ptr
, functionname_ptr
,
6462 if (!*functionname_ptr
)
6463 elf_find_function (abfd
, section
, symbols
, offset
,
6464 *filename_ptr
? NULL
: filename_ptr
,
6470 if (_bfd_dwarf2_find_nearest_line (abfd
, section
, symbols
, offset
,
6471 filename_ptr
, functionname_ptr
,
6473 &elf_tdata (abfd
)->dwarf2_find_line_info
))
6475 if (!*functionname_ptr
)
6476 elf_find_function (abfd
, section
, symbols
, offset
,
6477 *filename_ptr
? NULL
: filename_ptr
,
6483 if (! _bfd_stab_section_find_nearest_line (abfd
, symbols
, section
, offset
,
6484 &found
, filename_ptr
,
6485 functionname_ptr
, line_ptr
,
6486 &elf_tdata (abfd
)->line_info
))
6488 if (found
&& (*functionname_ptr
|| *line_ptr
))
6491 if (symbols
== NULL
)
6494 if (! elf_find_function (abfd
, section
, symbols
, offset
,
6495 filename_ptr
, functionname_ptr
))
6503 _bfd_elf_sizeof_headers (bfd
*abfd
, bfd_boolean reloc
)
6507 ret
= get_elf_backend_data (abfd
)->s
->sizeof_ehdr
;
6509 ret
+= get_program_header_size (abfd
);
6514 _bfd_elf_set_section_contents (bfd
*abfd
,
6516 const void *location
,
6518 bfd_size_type count
)
6520 Elf_Internal_Shdr
*hdr
;
6523 if (! abfd
->output_has_begun
6524 && ! _bfd_elf_compute_section_file_positions (abfd
, NULL
))
6527 hdr
= &elf_section_data (section
)->this_hdr
;
6528 pos
= hdr
->sh_offset
+ offset
;
6529 if (bfd_seek (abfd
, pos
, SEEK_SET
) != 0
6530 || bfd_bwrite (location
, count
, abfd
) != count
)
6537 _bfd_elf_no_info_to_howto (bfd
*abfd ATTRIBUTE_UNUSED
,
6538 arelent
*cache_ptr ATTRIBUTE_UNUSED
,
6539 Elf_Internal_Rela
*dst ATTRIBUTE_UNUSED
)
6544 /* Try to convert a non-ELF reloc into an ELF one. */
6547 _bfd_elf_validate_reloc (bfd
*abfd
, arelent
*areloc
)
6549 /* Check whether we really have an ELF howto. */
6551 if ((*areloc
->sym_ptr_ptr
)->the_bfd
->xvec
!= abfd
->xvec
)
6553 bfd_reloc_code_real_type code
;
6554 reloc_howto_type
*howto
;
6556 /* Alien reloc: Try to determine its type to replace it with an
6557 equivalent ELF reloc. */
6559 if (areloc
->howto
->pc_relative
)
6561 switch (areloc
->howto
->bitsize
)
6564 code
= BFD_RELOC_8_PCREL
;
6567 code
= BFD_RELOC_12_PCREL
;
6570 code
= BFD_RELOC_16_PCREL
;
6573 code
= BFD_RELOC_24_PCREL
;
6576 code
= BFD_RELOC_32_PCREL
;
6579 code
= BFD_RELOC_64_PCREL
;
6585 howto
= bfd_reloc_type_lookup (abfd
, code
);
6587 if (areloc
->howto
->pcrel_offset
!= howto
->pcrel_offset
)
6589 if (howto
->pcrel_offset
)
6590 areloc
->addend
+= areloc
->address
;
6592 areloc
->addend
-= areloc
->address
; /* addend is unsigned!! */
6597 switch (areloc
->howto
->bitsize
)
6603 code
= BFD_RELOC_14
;
6606 code
= BFD_RELOC_16
;
6609 code
= BFD_RELOC_26
;
6612 code
= BFD_RELOC_32
;
6615 code
= BFD_RELOC_64
;
6621 howto
= bfd_reloc_type_lookup (abfd
, code
);
6625 areloc
->howto
= howto
;
6633 (*_bfd_error_handler
)
6634 (_("%B: unsupported relocation type %s"),
6635 abfd
, areloc
->howto
->name
);
6636 bfd_set_error (bfd_error_bad_value
);
6641 _bfd_elf_close_and_cleanup (bfd
*abfd
)
6643 if (bfd_get_format (abfd
) == bfd_object
)
6645 if (elf_shstrtab (abfd
) != NULL
)
6646 _bfd_elf_strtab_free (elf_shstrtab (abfd
));
6649 return _bfd_generic_close_and_cleanup (abfd
);
6652 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
6653 in the relocation's offset. Thus we cannot allow any sort of sanity
6654 range-checking to interfere. There is nothing else to do in processing
6657 bfd_reloc_status_type
6658 _bfd_elf_rel_vtable_reloc_fn
6659 (bfd
*abfd ATTRIBUTE_UNUSED
, arelent
*re ATTRIBUTE_UNUSED
,
6660 struct bfd_symbol
*symbol ATTRIBUTE_UNUSED
,
6661 void *data ATTRIBUTE_UNUSED
, asection
*is ATTRIBUTE_UNUSED
,
6662 bfd
*obfd ATTRIBUTE_UNUSED
, char **errmsg ATTRIBUTE_UNUSED
)
6664 return bfd_reloc_ok
;
6667 /* Elf core file support. Much of this only works on native
6668 toolchains, since we rely on knowing the
6669 machine-dependent procfs structure in order to pick
6670 out details about the corefile. */
6672 #ifdef HAVE_SYS_PROCFS_H
6673 # include <sys/procfs.h>
6676 /* FIXME: this is kinda wrong, but it's what gdb wants. */
6679 elfcore_make_pid (bfd
*abfd
)
6681 return ((elf_tdata (abfd
)->core_lwpid
<< 16)
6682 + (elf_tdata (abfd
)->core_pid
));
6685 /* If there isn't a section called NAME, make one, using
6686 data from SECT. Note, this function will generate a
6687 reference to NAME, so you shouldn't deallocate or
6691 elfcore_maybe_make_sect (bfd
*abfd
, char *name
, asection
*sect
)
6695 if (bfd_get_section_by_name (abfd
, name
) != NULL
)
6698 sect2
= bfd_make_section (abfd
, name
);
6702 sect2
->size
= sect
->size
;
6703 sect2
->filepos
= sect
->filepos
;
6704 sect2
->flags
= sect
->flags
;
6705 sect2
->alignment_power
= sect
->alignment_power
;
6709 /* Create a pseudosection containing SIZE bytes at FILEPOS. This
6710 actually creates up to two pseudosections:
6711 - For the single-threaded case, a section named NAME, unless
6712 such a section already exists.
6713 - For the multi-threaded case, a section named "NAME/PID", where
6714 PID is elfcore_make_pid (abfd).
6715 Both pseudosections have identical contents. */
6717 _bfd_elfcore_make_pseudosection (bfd
*abfd
,
6723 char *threaded_name
;
6727 /* Build the section name. */
6729 sprintf (buf
, "%s/%d", name
, elfcore_make_pid (abfd
));
6730 len
= strlen (buf
) + 1;
6731 threaded_name
= bfd_alloc (abfd
, len
);
6732 if (threaded_name
== NULL
)
6734 memcpy (threaded_name
, buf
, len
);
6736 sect
= bfd_make_section_anyway (abfd
, threaded_name
);
6740 sect
->filepos
= filepos
;
6741 sect
->flags
= SEC_HAS_CONTENTS
;
6742 sect
->alignment_power
= 2;
6744 return elfcore_maybe_make_sect (abfd
, name
, sect
);
6747 /* prstatus_t exists on:
6749 linux 2.[01] + glibc
6753 #if defined (HAVE_PRSTATUS_T)
6756 elfcore_grok_prstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
6761 if (note
->descsz
== sizeof (prstatus_t
))
6765 size
= sizeof (prstat
.pr_reg
);
6766 offset
= offsetof (prstatus_t
, pr_reg
);
6767 memcpy (&prstat
, note
->descdata
, sizeof (prstat
));
6769 /* Do not overwrite the core signal if it
6770 has already been set by another thread. */
6771 if (elf_tdata (abfd
)->core_signal
== 0)
6772 elf_tdata (abfd
)->core_signal
= prstat
.pr_cursig
;
6773 elf_tdata (abfd
)->core_pid
= prstat
.pr_pid
;
6775 /* pr_who exists on:
6778 pr_who doesn't exist on:
6781 #if defined (HAVE_PRSTATUS_T_PR_WHO)
6782 elf_tdata (abfd
)->core_lwpid
= prstat
.pr_who
;
6785 #if defined (HAVE_PRSTATUS32_T)
6786 else if (note
->descsz
== sizeof (prstatus32_t
))
6788 /* 64-bit host, 32-bit corefile */
6789 prstatus32_t prstat
;
6791 size
= sizeof (prstat
.pr_reg
);
6792 offset
= offsetof (prstatus32_t
, pr_reg
);
6793 memcpy (&prstat
, note
->descdata
, sizeof (prstat
));
6795 /* Do not overwrite the core signal if it
6796 has already been set by another thread. */
6797 if (elf_tdata (abfd
)->core_signal
== 0)
6798 elf_tdata (abfd
)->core_signal
= prstat
.pr_cursig
;
6799 elf_tdata (abfd
)->core_pid
= prstat
.pr_pid
;
6801 /* pr_who exists on:
6804 pr_who doesn't exist on:
6807 #if defined (HAVE_PRSTATUS32_T_PR_WHO)
6808 elf_tdata (abfd
)->core_lwpid
= prstat
.pr_who
;
6811 #endif /* HAVE_PRSTATUS32_T */
6814 /* Fail - we don't know how to handle any other
6815 note size (ie. data object type). */
6819 /* Make a ".reg/999" section and a ".reg" section. */
6820 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
6821 size
, note
->descpos
+ offset
);
6823 #endif /* defined (HAVE_PRSTATUS_T) */
6825 /* Create a pseudosection containing the exact contents of NOTE. */
6827 elfcore_make_note_pseudosection (bfd
*abfd
,
6829 Elf_Internal_Note
*note
)
6831 return _bfd_elfcore_make_pseudosection (abfd
, name
,
6832 note
->descsz
, note
->descpos
);
6835 /* There isn't a consistent prfpregset_t across platforms,
6836 but it doesn't matter, because we don't have to pick this
6837 data structure apart. */
6840 elfcore_grok_prfpreg (bfd
*abfd
, Elf_Internal_Note
*note
)
6842 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
6845 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
6846 type of 5 (NT_PRXFPREG). Just include the whole note's contents
6850 elfcore_grok_prxfpreg (bfd
*abfd
, Elf_Internal_Note
*note
)
6852 return elfcore_make_note_pseudosection (abfd
, ".reg-xfp", note
);
6855 #if defined (HAVE_PRPSINFO_T)
6856 typedef prpsinfo_t elfcore_psinfo_t
;
6857 #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
6858 typedef prpsinfo32_t elfcore_psinfo32_t
;
6862 #if defined (HAVE_PSINFO_T)
6863 typedef psinfo_t elfcore_psinfo_t
;
6864 #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
6865 typedef psinfo32_t elfcore_psinfo32_t
;
6869 /* return a malloc'ed copy of a string at START which is at
6870 most MAX bytes long, possibly without a terminating '\0'.
6871 the copy will always have a terminating '\0'. */
6874 _bfd_elfcore_strndup (bfd
*abfd
, char *start
, size_t max
)
6877 char *end
= memchr (start
, '\0', max
);
6885 dups
= bfd_alloc (abfd
, len
+ 1);
6889 memcpy (dups
, start
, len
);
6895 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
6897 elfcore_grok_psinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
6899 if (note
->descsz
== sizeof (elfcore_psinfo_t
))
6901 elfcore_psinfo_t psinfo
;
6903 memcpy (&psinfo
, note
->descdata
, sizeof (psinfo
));
6905 elf_tdata (abfd
)->core_program
6906 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_fname
,
6907 sizeof (psinfo
.pr_fname
));
6909 elf_tdata (abfd
)->core_command
6910 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_psargs
,
6911 sizeof (psinfo
.pr_psargs
));
6913 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
6914 else if (note
->descsz
== sizeof (elfcore_psinfo32_t
))
6916 /* 64-bit host, 32-bit corefile */
6917 elfcore_psinfo32_t psinfo
;
6919 memcpy (&psinfo
, note
->descdata
, sizeof (psinfo
));
6921 elf_tdata (abfd
)->core_program
6922 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_fname
,
6923 sizeof (psinfo
.pr_fname
));
6925 elf_tdata (abfd
)->core_command
6926 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_psargs
,
6927 sizeof (psinfo
.pr_psargs
));
6933 /* Fail - we don't know how to handle any other
6934 note size (ie. data object type). */
6938 /* Note that for some reason, a spurious space is tacked
6939 onto the end of the args in some (at least one anyway)
6940 implementations, so strip it off if it exists. */
6943 char *command
= elf_tdata (abfd
)->core_command
;
6944 int n
= strlen (command
);
6946 if (0 < n
&& command
[n
- 1] == ' ')
6947 command
[n
- 1] = '\0';
6952 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
6954 #if defined (HAVE_PSTATUS_T)
6956 elfcore_grok_pstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
6958 if (note
->descsz
== sizeof (pstatus_t
)
6959 #if defined (HAVE_PXSTATUS_T)
6960 || note
->descsz
== sizeof (pxstatus_t
)
6966 memcpy (&pstat
, note
->descdata
, sizeof (pstat
));
6968 elf_tdata (abfd
)->core_pid
= pstat
.pr_pid
;
6970 #if defined (HAVE_PSTATUS32_T)
6971 else if (note
->descsz
== sizeof (pstatus32_t
))
6973 /* 64-bit host, 32-bit corefile */
6976 memcpy (&pstat
, note
->descdata
, sizeof (pstat
));
6978 elf_tdata (abfd
)->core_pid
= pstat
.pr_pid
;
6981 /* Could grab some more details from the "representative"
6982 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
6983 NT_LWPSTATUS note, presumably. */
6987 #endif /* defined (HAVE_PSTATUS_T) */
6989 #if defined (HAVE_LWPSTATUS_T)
6991 elfcore_grok_lwpstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
6993 lwpstatus_t lwpstat
;
6999 if (note
->descsz
!= sizeof (lwpstat
)
7000 #if defined (HAVE_LWPXSTATUS_T)
7001 && note
->descsz
!= sizeof (lwpxstatus_t
)
7006 memcpy (&lwpstat
, note
->descdata
, sizeof (lwpstat
));
7008 elf_tdata (abfd
)->core_lwpid
= lwpstat
.pr_lwpid
;
7009 elf_tdata (abfd
)->core_signal
= lwpstat
.pr_cursig
;
7011 /* Make a ".reg/999" section. */
7013 sprintf (buf
, ".reg/%d", elfcore_make_pid (abfd
));
7014 len
= strlen (buf
) + 1;
7015 name
= bfd_alloc (abfd
, len
);
7018 memcpy (name
, buf
, len
);
7020 sect
= bfd_make_section_anyway (abfd
, name
);
7024 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7025 sect
->size
= sizeof (lwpstat
.pr_context
.uc_mcontext
.gregs
);
7026 sect
->filepos
= note
->descpos
7027 + offsetof (lwpstatus_t
, pr_context
.uc_mcontext
.gregs
);
7030 #if defined (HAVE_LWPSTATUS_T_PR_REG)
7031 sect
->size
= sizeof (lwpstat
.pr_reg
);
7032 sect
->filepos
= note
->descpos
+ offsetof (lwpstatus_t
, pr_reg
);
7035 sect
->flags
= SEC_HAS_CONTENTS
;
7036 sect
->alignment_power
= 2;
7038 if (!elfcore_maybe_make_sect (abfd
, ".reg", sect
))
7041 /* Make a ".reg2/999" section */
7043 sprintf (buf
, ".reg2/%d", elfcore_make_pid (abfd
));
7044 len
= strlen (buf
) + 1;
7045 name
= bfd_alloc (abfd
, len
);
7048 memcpy (name
, buf
, len
);
7050 sect
= bfd_make_section_anyway (abfd
, name
);
7054 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7055 sect
->size
= sizeof (lwpstat
.pr_context
.uc_mcontext
.fpregs
);
7056 sect
->filepos
= note
->descpos
7057 + offsetof (lwpstatus_t
, pr_context
.uc_mcontext
.fpregs
);
7060 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
7061 sect
->size
= sizeof (lwpstat
.pr_fpreg
);
7062 sect
->filepos
= note
->descpos
+ offsetof (lwpstatus_t
, pr_fpreg
);
7065 sect
->flags
= SEC_HAS_CONTENTS
;
7066 sect
->alignment_power
= 2;
7068 return elfcore_maybe_make_sect (abfd
, ".reg2", sect
);
7070 #endif /* defined (HAVE_LWPSTATUS_T) */
7072 #if defined (HAVE_WIN32_PSTATUS_T)
7074 elfcore_grok_win32pstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
7080 win32_pstatus_t pstatus
;
7082 if (note
->descsz
< sizeof (pstatus
))
7085 memcpy (&pstatus
, note
->descdata
, sizeof (pstatus
));
7087 switch (pstatus
.data_type
)
7089 case NOTE_INFO_PROCESS
:
7090 /* FIXME: need to add ->core_command. */
7091 elf_tdata (abfd
)->core_signal
= pstatus
.data
.process_info
.signal
;
7092 elf_tdata (abfd
)->core_pid
= pstatus
.data
.process_info
.pid
;
7095 case NOTE_INFO_THREAD
:
7096 /* Make a ".reg/999" section. */
7097 sprintf (buf
, ".reg/%ld", (long) pstatus
.data
.thread_info
.tid
);
7099 len
= strlen (buf
) + 1;
7100 name
= bfd_alloc (abfd
, len
);
7104 memcpy (name
, buf
, len
);
7106 sect
= bfd_make_section_anyway (abfd
, name
);
7110 sect
->size
= sizeof (pstatus
.data
.thread_info
.thread_context
);
7111 sect
->filepos
= (note
->descpos
7112 + offsetof (struct win32_pstatus
,
7113 data
.thread_info
.thread_context
));
7114 sect
->flags
= SEC_HAS_CONTENTS
;
7115 sect
->alignment_power
= 2;
7117 if (pstatus
.data
.thread_info
.is_active_thread
)
7118 if (! elfcore_maybe_make_sect (abfd
, ".reg", sect
))
7122 case NOTE_INFO_MODULE
:
7123 /* Make a ".module/xxxxxxxx" section. */
7124 sprintf (buf
, ".module/%08lx",
7125 (long) pstatus
.data
.module_info
.base_address
);
7127 len
= strlen (buf
) + 1;
7128 name
= bfd_alloc (abfd
, len
);
7132 memcpy (name
, buf
, len
);
7134 sect
= bfd_make_section_anyway (abfd
, name
);
7139 sect
->size
= note
->descsz
;
7140 sect
->filepos
= note
->descpos
;
7141 sect
->flags
= SEC_HAS_CONTENTS
;
7142 sect
->alignment_power
= 2;
7151 #endif /* HAVE_WIN32_PSTATUS_T */
7154 elfcore_grok_note (bfd
*abfd
, Elf_Internal_Note
*note
)
7156 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
7164 if (bed
->elf_backend_grok_prstatus
)
7165 if ((*bed
->elf_backend_grok_prstatus
) (abfd
, note
))
7167 #if defined (HAVE_PRSTATUS_T)
7168 return elfcore_grok_prstatus (abfd
, note
);
7173 #if defined (HAVE_PSTATUS_T)
7175 return elfcore_grok_pstatus (abfd
, note
);
7178 #if defined (HAVE_LWPSTATUS_T)
7180 return elfcore_grok_lwpstatus (abfd
, note
);
7183 case NT_FPREGSET
: /* FIXME: rename to NT_PRFPREG */
7184 return elfcore_grok_prfpreg (abfd
, note
);
7186 #if defined (HAVE_WIN32_PSTATUS_T)
7187 case NT_WIN32PSTATUS
:
7188 return elfcore_grok_win32pstatus (abfd
, note
);
7191 case NT_PRXFPREG
: /* Linux SSE extension */
7192 if (note
->namesz
== 6
7193 && strcmp (note
->namedata
, "LINUX") == 0)
7194 return elfcore_grok_prxfpreg (abfd
, note
);
7200 if (bed
->elf_backend_grok_psinfo
)
7201 if ((*bed
->elf_backend_grok_psinfo
) (abfd
, note
))
7203 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7204 return elfcore_grok_psinfo (abfd
, note
);
7211 asection
*sect
= bfd_make_section_anyway (abfd
, ".auxv");
7215 sect
->size
= note
->descsz
;
7216 sect
->filepos
= note
->descpos
;
7217 sect
->flags
= SEC_HAS_CONTENTS
;
7218 sect
->alignment_power
= 1 + bfd_get_arch_size (abfd
) / 32;
7226 elfcore_netbsd_get_lwpid (Elf_Internal_Note
*note
, int *lwpidp
)
7230 cp
= strchr (note
->namedata
, '@');
7233 *lwpidp
= atoi(cp
+ 1);
7240 elfcore_grok_netbsd_procinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
7243 /* Signal number at offset 0x08. */
7244 elf_tdata (abfd
)->core_signal
7245 = bfd_h_get_32 (abfd
, (bfd_byte
*) note
->descdata
+ 0x08);
7247 /* Process ID at offset 0x50. */
7248 elf_tdata (abfd
)->core_pid
7249 = bfd_h_get_32 (abfd
, (bfd_byte
*) note
->descdata
+ 0x50);
7251 /* Command name at 0x7c (max 32 bytes, including nul). */
7252 elf_tdata (abfd
)->core_command
7253 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 0x7c, 31);
7255 return elfcore_make_note_pseudosection (abfd
, ".note.netbsdcore.procinfo",
7260 elfcore_grok_netbsd_note (bfd
*abfd
, Elf_Internal_Note
*note
)
7264 if (elfcore_netbsd_get_lwpid (note
, &lwp
))
7265 elf_tdata (abfd
)->core_lwpid
= lwp
;
7267 if (note
->type
== NT_NETBSDCORE_PROCINFO
)
7269 /* NetBSD-specific core "procinfo". Note that we expect to
7270 find this note before any of the others, which is fine,
7271 since the kernel writes this note out first when it
7272 creates a core file. */
7274 return elfcore_grok_netbsd_procinfo (abfd
, note
);
7277 /* As of Jan 2002 there are no other machine-independent notes
7278 defined for NetBSD core files. If the note type is less
7279 than the start of the machine-dependent note types, we don't
7282 if (note
->type
< NT_NETBSDCORE_FIRSTMACH
)
7286 switch (bfd_get_arch (abfd
))
7288 /* On the Alpha, SPARC (32-bit and 64-bit), PT_GETREGS == mach+0 and
7289 PT_GETFPREGS == mach+2. */
7291 case bfd_arch_alpha
:
7292 case bfd_arch_sparc
:
7295 case NT_NETBSDCORE_FIRSTMACH
+0:
7296 return elfcore_make_note_pseudosection (abfd
, ".reg", note
);
7298 case NT_NETBSDCORE_FIRSTMACH
+2:
7299 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
7305 /* On all other arch's, PT_GETREGS == mach+1 and
7306 PT_GETFPREGS == mach+3. */
7311 case NT_NETBSDCORE_FIRSTMACH
+1:
7312 return elfcore_make_note_pseudosection (abfd
, ".reg", note
);
7314 case NT_NETBSDCORE_FIRSTMACH
+3:
7315 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
7325 elfcore_grok_nto_status (bfd
*abfd
, Elf_Internal_Note
*note
, pid_t
*tid
)
7327 void *ddata
= note
->descdata
;
7334 /* nto_procfs_status 'pid' field is at offset 0. */
7335 elf_tdata (abfd
)->core_pid
= bfd_get_32 (abfd
, (bfd_byte
*) ddata
);
7337 /* nto_procfs_status 'tid' field is at offset 4. Pass it back. */
7338 *tid
= bfd_get_32 (abfd
, (bfd_byte
*) ddata
+ 4);
7340 /* nto_procfs_status 'flags' field is at offset 8. */
7341 flags
= bfd_get_32 (abfd
, (bfd_byte
*) ddata
+ 8);
7343 /* nto_procfs_status 'what' field is at offset 14. */
7344 if ((sig
= bfd_get_16 (abfd
, (bfd_byte
*) ddata
+ 14)) > 0)
7346 elf_tdata (abfd
)->core_signal
= sig
;
7347 elf_tdata (abfd
)->core_lwpid
= *tid
;
7350 /* _DEBUG_FLAG_CURTID (current thread) is 0x80. Some cores
7351 do not come from signals so we make sure we set the current
7352 thread just in case. */
7353 if (flags
& 0x00000080)
7354 elf_tdata (abfd
)->core_lwpid
= *tid
;
7356 /* Make a ".qnx_core_status/%d" section. */
7357 sprintf (buf
, ".qnx_core_status/%ld", (long) *tid
);
7359 name
= bfd_alloc (abfd
, strlen (buf
) + 1);
7364 sect
= bfd_make_section_anyway (abfd
, name
);
7368 sect
->size
= note
->descsz
;
7369 sect
->filepos
= note
->descpos
;
7370 sect
->flags
= SEC_HAS_CONTENTS
;
7371 sect
->alignment_power
= 2;
7373 return (elfcore_maybe_make_sect (abfd
, ".qnx_core_status", sect
));
7377 elfcore_grok_nto_regs (bfd
*abfd
,
7378 Elf_Internal_Note
*note
,
7386 /* Make a "(base)/%d" section. */
7387 sprintf (buf
, "%s/%ld", base
, (long) 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
, base
, 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
:
7426 return elfcore_make_note_pseudosection (abfd
, ".qnx_core_info", note
);
7427 case BFD_QNT_CORE_STATUS
:
7428 return elfcore_grok_nto_status (abfd
, note
, &tid
);
7429 case BFD_QNT_CORE_GREG
:
7430 return elfcore_grok_nto_regs (abfd
, note
, tid
, ".reg");
7431 case BFD_QNT_CORE_FPREG
:
7432 return elfcore_grok_nto_regs (abfd
, note
, tid
, ".reg2");
7438 /* Function: elfcore_write_note
7445 size of data for note
7448 End of buffer containing note. */
7451 elfcore_write_note (bfd
*abfd
,
7459 Elf_External_Note
*xnp
;
7469 const struct elf_backend_data
*bed
;
7471 namesz
= strlen (name
) + 1;
7472 bed
= get_elf_backend_data (abfd
);
7473 pad
= -namesz
& ((1 << bed
->s
->log_file_align
) - 1);
7476 newspace
= 12 + namesz
+ pad
+ size
;
7478 p
= realloc (buf
, *bufsiz
+ newspace
);
7480 *bufsiz
+= newspace
;
7481 xnp
= (Elf_External_Note
*) dest
;
7482 H_PUT_32 (abfd
, namesz
, xnp
->namesz
);
7483 H_PUT_32 (abfd
, size
, xnp
->descsz
);
7484 H_PUT_32 (abfd
, type
, xnp
->type
);
7488 memcpy (dest
, name
, namesz
);
7496 memcpy (dest
, input
, size
);
7500 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7502 elfcore_write_prpsinfo (bfd
*abfd
,
7509 char *note_name
= "CORE";
7511 #if defined (HAVE_PSINFO_T)
7513 note_type
= NT_PSINFO
;
7516 note_type
= NT_PRPSINFO
;
7519 memset (&data
, 0, sizeof (data
));
7520 strncpy (data
.pr_fname
, fname
, sizeof (data
.pr_fname
));
7521 strncpy (data
.pr_psargs
, psargs
, sizeof (data
.pr_psargs
));
7522 return elfcore_write_note (abfd
, buf
, bufsiz
,
7523 note_name
, note_type
, &data
, sizeof (data
));
7525 #endif /* PSINFO_T or PRPSINFO_T */
7527 #if defined (HAVE_PRSTATUS_T)
7529 elfcore_write_prstatus (bfd
*abfd
,
7537 char *note_name
= "CORE";
7539 memset (&prstat
, 0, sizeof (prstat
));
7540 prstat
.pr_pid
= pid
;
7541 prstat
.pr_cursig
= cursig
;
7542 memcpy (&prstat
.pr_reg
, gregs
, sizeof (prstat
.pr_reg
));
7543 return elfcore_write_note (abfd
, buf
, bufsiz
,
7544 note_name
, NT_PRSTATUS
, &prstat
, sizeof (prstat
));
7546 #endif /* HAVE_PRSTATUS_T */
7548 #if defined (HAVE_LWPSTATUS_T)
7550 elfcore_write_lwpstatus (bfd
*abfd
,
7557 lwpstatus_t lwpstat
;
7558 char *note_name
= "CORE";
7560 memset (&lwpstat
, 0, sizeof (lwpstat
));
7561 lwpstat
.pr_lwpid
= pid
>> 16;
7562 lwpstat
.pr_cursig
= cursig
;
7563 #if defined (HAVE_LWPSTATUS_T_PR_REG)
7564 memcpy (lwpstat
.pr_reg
, gregs
, sizeof (lwpstat
.pr_reg
));
7565 #elif defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7567 memcpy (lwpstat
.pr_context
.uc_mcontext
.gregs
,
7568 gregs
, sizeof (lwpstat
.pr_context
.uc_mcontext
.gregs
));
7570 memcpy (lwpstat
.pr_context
.uc_mcontext
.__gregs
,
7571 gregs
, sizeof (lwpstat
.pr_context
.uc_mcontext
.__gregs
));
7574 return elfcore_write_note (abfd
, buf
, bufsiz
, note_name
,
7575 NT_LWPSTATUS
, &lwpstat
, sizeof (lwpstat
));
7577 #endif /* HAVE_LWPSTATUS_T */
7579 #if defined (HAVE_PSTATUS_T)
7581 elfcore_write_pstatus (bfd
*abfd
,
7589 char *note_name
= "CORE";
7591 memset (&pstat
, 0, sizeof (pstat
));
7592 pstat
.pr_pid
= pid
& 0xffff;
7593 buf
= elfcore_write_note (abfd
, buf
, bufsiz
, note_name
,
7594 NT_PSTATUS
, &pstat
, sizeof (pstat
));
7597 #endif /* HAVE_PSTATUS_T */
7600 elfcore_write_prfpreg (bfd
*abfd
,
7606 char *note_name
= "CORE";
7607 return elfcore_write_note (abfd
, buf
, bufsiz
,
7608 note_name
, NT_FPREGSET
, fpregs
, size
);
7612 elfcore_write_prxfpreg (bfd
*abfd
,
7615 const void *xfpregs
,
7618 char *note_name
= "LINUX";
7619 return elfcore_write_note (abfd
, buf
, bufsiz
,
7620 note_name
, NT_PRXFPREG
, xfpregs
, size
);
7624 elfcore_read_notes (bfd
*abfd
, file_ptr offset
, bfd_size_type size
)
7632 if (bfd_seek (abfd
, offset
, SEEK_SET
) != 0)
7635 buf
= bfd_malloc (size
);
7639 if (bfd_bread (buf
, size
, abfd
) != size
)
7647 while (p
< buf
+ size
)
7649 /* FIXME: bad alignment assumption. */
7650 Elf_External_Note
*xnp
= (Elf_External_Note
*) p
;
7651 Elf_Internal_Note in
;
7653 in
.type
= H_GET_32 (abfd
, xnp
->type
);
7655 in
.namesz
= H_GET_32 (abfd
, xnp
->namesz
);
7656 in
.namedata
= xnp
->name
;
7658 in
.descsz
= H_GET_32 (abfd
, xnp
->descsz
);
7659 in
.descdata
= in
.namedata
+ BFD_ALIGN (in
.namesz
, 4);
7660 in
.descpos
= offset
+ (in
.descdata
- buf
);
7662 if (strncmp (in
.namedata
, "NetBSD-CORE", 11) == 0)
7664 if (! elfcore_grok_netbsd_note (abfd
, &in
))
7667 else if (strncmp (in
.namedata
, "QNX", 3) == 0)
7669 if (! elfcore_grok_nto_note (abfd
, &in
))
7674 if (! elfcore_grok_note (abfd
, &in
))
7678 p
= in
.descdata
+ BFD_ALIGN (in
.descsz
, 4);
7685 /* Providing external access to the ELF program header table. */
7687 /* Return an upper bound on the number of bytes required to store a
7688 copy of ABFD's program header table entries. Return -1 if an error
7689 occurs; bfd_get_error will return an appropriate code. */
7692 bfd_get_elf_phdr_upper_bound (bfd
*abfd
)
7694 if (abfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
7696 bfd_set_error (bfd_error_wrong_format
);
7700 return elf_elfheader (abfd
)->e_phnum
* sizeof (Elf_Internal_Phdr
);
7703 /* Copy ABFD's program header table entries to *PHDRS. The entries
7704 will be stored as an array of Elf_Internal_Phdr structures, as
7705 defined in include/elf/internal.h. To find out how large the
7706 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
7708 Return the number of program header table entries read, or -1 if an
7709 error occurs; bfd_get_error will return an appropriate code. */
7712 bfd_get_elf_phdrs (bfd
*abfd
, void *phdrs
)
7716 if (abfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
7718 bfd_set_error (bfd_error_wrong_format
);
7722 num_phdrs
= elf_elfheader (abfd
)->e_phnum
;
7723 memcpy (phdrs
, elf_tdata (abfd
)->phdr
,
7724 num_phdrs
* sizeof (Elf_Internal_Phdr
));
7730 _bfd_elf_sprintf_vma (bfd
*abfd ATTRIBUTE_UNUSED
, char *buf
, bfd_vma value
)
7733 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
7735 i_ehdrp
= elf_elfheader (abfd
);
7736 if (i_ehdrp
== NULL
)
7737 sprintf_vma (buf
, value
);
7740 if (i_ehdrp
->e_ident
[EI_CLASS
] == ELFCLASS64
)
7742 #if BFD_HOST_64BIT_LONG
7743 sprintf (buf
, "%016lx", value
);
7745 sprintf (buf
, "%08lx%08lx", _bfd_int64_high (value
),
7746 _bfd_int64_low (value
));
7750 sprintf (buf
, "%08lx", (unsigned long) (value
& 0xffffffff));
7753 sprintf_vma (buf
, value
);
7758 _bfd_elf_fprintf_vma (bfd
*abfd ATTRIBUTE_UNUSED
, void *stream
, bfd_vma value
)
7761 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
7763 i_ehdrp
= elf_elfheader (abfd
);
7764 if (i_ehdrp
== NULL
)
7765 fprintf_vma ((FILE *) stream
, value
);
7768 if (i_ehdrp
->e_ident
[EI_CLASS
] == ELFCLASS64
)
7770 #if BFD_HOST_64BIT_LONG
7771 fprintf ((FILE *) stream
, "%016lx", value
);
7773 fprintf ((FILE *) stream
, "%08lx%08lx",
7774 _bfd_int64_high (value
), _bfd_int64_low (value
));
7778 fprintf ((FILE *) stream
, "%08lx",
7779 (unsigned long) (value
& 0xffffffff));
7782 fprintf_vma ((FILE *) stream
, value
);
7786 enum elf_reloc_type_class
7787 _bfd_elf_reloc_type_class (const Elf_Internal_Rela
*rela ATTRIBUTE_UNUSED
)
7789 return reloc_class_normal
;
7792 /* For RELA architectures, return the relocation value for a
7793 relocation against a local symbol. */
7796 _bfd_elf_rela_local_sym (bfd
*abfd
,
7797 Elf_Internal_Sym
*sym
,
7799 Elf_Internal_Rela
*rel
)
7801 asection
*sec
= *psec
;
7804 relocation
= (sec
->output_section
->vma
7805 + sec
->output_offset
7807 if ((sec
->flags
& SEC_MERGE
)
7808 && ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
7809 && sec
->sec_info_type
== ELF_INFO_TYPE_MERGE
)
7812 _bfd_merged_section_offset (abfd
, psec
,
7813 elf_section_data (sec
)->sec_info
,
7814 sym
->st_value
+ rel
->r_addend
);
7817 /* If we have changed the section, and our original section is
7818 marked with SEC_EXCLUDE, it means that the original
7819 SEC_MERGE section has been completely subsumed in some
7820 other SEC_MERGE section. In this case, we need to leave
7821 some info around for --emit-relocs. */
7822 if ((sec
->flags
& SEC_EXCLUDE
) != 0)
7823 sec
->kept_section
= *psec
;
7826 rel
->r_addend
-= relocation
;
7827 rel
->r_addend
+= sec
->output_section
->vma
+ sec
->output_offset
;
7833 _bfd_elf_rel_local_sym (bfd
*abfd
,
7834 Elf_Internal_Sym
*sym
,
7838 asection
*sec
= *psec
;
7840 if (sec
->sec_info_type
!= ELF_INFO_TYPE_MERGE
)
7841 return sym
->st_value
+ addend
;
7843 return _bfd_merged_section_offset (abfd
, psec
,
7844 elf_section_data (sec
)->sec_info
,
7845 sym
->st_value
+ addend
);
7849 _bfd_elf_section_offset (bfd
*abfd
,
7850 struct bfd_link_info
*info
,
7854 switch (sec
->sec_info_type
)
7856 case ELF_INFO_TYPE_STABS
:
7857 return _bfd_stab_section_offset (sec
, elf_section_data (sec
)->sec_info
,
7859 case ELF_INFO_TYPE_EH_FRAME
:
7860 return _bfd_elf_eh_frame_section_offset (abfd
, info
, sec
, offset
);
7866 /* Create a new BFD as if by bfd_openr. Rather than opening a file,
7867 reconstruct an ELF file by reading the segments out of remote memory
7868 based on the ELF file header at EHDR_VMA and the ELF program headers it
7869 points to. If not null, *LOADBASEP is filled in with the difference
7870 between the VMAs from which the segments were read, and the VMAs the
7871 file headers (and hence BFD's idea of each section's VMA) put them at.
7873 The function TARGET_READ_MEMORY is called to copy LEN bytes from the
7874 remote memory at target address VMA into the local buffer at MYADDR; it
7875 should return zero on success or an `errno' code on failure. TEMPL must
7876 be a BFD for an ELF target with the word size and byte order found in
7877 the remote memory. */
7880 bfd_elf_bfd_from_remote_memory
7884 int (*target_read_memory
) (bfd_vma
, bfd_byte
*, int))
7886 return (*get_elf_backend_data (templ
)->elf_backend_bfd_from_remote_memory
)
7887 (templ
, ehdr_vma
, loadbasep
, target_read_memory
);
7891 _bfd_elf_get_synthetic_symtab (bfd
*abfd
,
7892 long symcount ATTRIBUTE_UNUSED
,
7893 asymbol
**syms ATTRIBUTE_UNUSED
,
7898 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
7901 const char *relplt_name
;
7902 bfd_boolean (*slurp_relocs
) (bfd
*, asection
*, asymbol
**, bfd_boolean
);
7906 Elf_Internal_Shdr
*hdr
;
7912 if ((abfd
->flags
& (DYNAMIC
| EXEC_P
)) == 0)
7915 if (dynsymcount
<= 0)
7918 if (!bed
->plt_sym_val
)
7921 relplt_name
= bed
->relplt_name
;
7922 if (relplt_name
== NULL
)
7923 relplt_name
= bed
->default_use_rela_p
? ".rela.plt" : ".rel.plt";
7924 relplt
= bfd_get_section_by_name (abfd
, relplt_name
);
7928 hdr
= &elf_section_data (relplt
)->this_hdr
;
7929 if (hdr
->sh_link
!= elf_dynsymtab (abfd
)
7930 || (hdr
->sh_type
!= SHT_REL
&& hdr
->sh_type
!= SHT_RELA
))
7933 plt
= bfd_get_section_by_name (abfd
, ".plt");
7937 slurp_relocs
= get_elf_backend_data (abfd
)->s
->slurp_reloc_table
;
7938 if (! (*slurp_relocs
) (abfd
, relplt
, dynsyms
, TRUE
))
7941 count
= relplt
->size
/ hdr
->sh_entsize
;
7942 size
= count
* sizeof (asymbol
);
7943 p
= relplt
->relocation
;
7944 for (i
= 0; i
< count
; i
++, s
++, p
++)
7945 size
+= strlen ((*p
->sym_ptr_ptr
)->name
) + sizeof ("@plt");
7947 s
= *ret
= bfd_malloc (size
);
7951 names
= (char *) (s
+ count
);
7952 p
= relplt
->relocation
;
7954 for (i
= 0; i
< count
; i
++, s
++, p
++)
7959 addr
= bed
->plt_sym_val (i
, plt
, p
);
7960 if (addr
== (bfd_vma
) -1)
7963 *s
= **p
->sym_ptr_ptr
;
7965 s
->value
= addr
- plt
->vma
;
7967 len
= strlen ((*p
->sym_ptr_ptr
)->name
);
7968 memcpy (names
, (*p
->sym_ptr_ptr
)->name
, len
);
7970 memcpy (names
, "@plt", sizeof ("@plt"));
7971 names
+= sizeof ("@plt");
7978 /* Sort symbol by binding and section. We want to put definitions
7979 sorted by section at the beginning. */
7982 elf_sort_elf_symbol (const void *arg1
, const void *arg2
)
7984 const Elf_Internal_Sym
*s1
;
7985 const Elf_Internal_Sym
*s2
;
7988 /* Make sure that undefined symbols are at the end. */
7989 s1
= (const Elf_Internal_Sym
*) arg1
;
7990 if (s1
->st_shndx
== SHN_UNDEF
)
7992 s2
= (const Elf_Internal_Sym
*) arg2
;
7993 if (s2
->st_shndx
== SHN_UNDEF
)
7996 /* Sorted by section index. */
7997 shndx
= s1
->st_shndx
- s2
->st_shndx
;
8001 /* Sorted by binding. */
8002 return ELF_ST_BIND (s1
->st_info
) - ELF_ST_BIND (s2
->st_info
);
8007 Elf_Internal_Sym
*sym
;
8012 elf_sym_name_compare (const void *arg1
, const void *arg2
)
8014 const struct elf_symbol
*s1
= (const struct elf_symbol
*) arg1
;
8015 const struct elf_symbol
*s2
= (const struct elf_symbol
*) arg2
;
8016 return strcmp (s1
->name
, s2
->name
);
8019 /* Check if 2 sections define the same set of local and global
8023 bfd_elf_match_symbols_in_sections (asection
*sec1
, asection
*sec2
)
8026 const struct elf_backend_data
*bed1
, *bed2
;
8027 Elf_Internal_Shdr
*hdr1
, *hdr2
;
8028 bfd_size_type symcount1
, symcount2
;
8029 Elf_Internal_Sym
*isymbuf1
, *isymbuf2
;
8030 Elf_Internal_Sym
*isymstart1
= NULL
, *isymstart2
= NULL
, *isym
;
8031 Elf_Internal_Sym
*isymend
;
8032 struct elf_symbol
*symp
, *symtable1
= NULL
, *symtable2
= NULL
;
8033 bfd_size_type count1
, count2
, i
;
8040 /* If both are .gnu.linkonce sections, they have to have the same
8042 if (strncmp (sec1
->name
, ".gnu.linkonce",
8043 sizeof ".gnu.linkonce" - 1) == 0
8044 && strncmp (sec2
->name
, ".gnu.linkonce",
8045 sizeof ".gnu.linkonce" - 1) == 0)
8046 return strcmp (sec1
->name
+ sizeof ".gnu.linkonce",
8047 sec2
->name
+ sizeof ".gnu.linkonce") == 0;
8049 /* Both sections have to be in ELF. */
8050 if (bfd_get_flavour (bfd1
) != bfd_target_elf_flavour
8051 || bfd_get_flavour (bfd2
) != bfd_target_elf_flavour
)
8054 if (elf_section_type (sec1
) != elf_section_type (sec2
))
8057 if ((elf_section_flags (sec1
) & SHF_GROUP
) != 0
8058 && (elf_section_flags (sec2
) & SHF_GROUP
) != 0)
8060 /* If both are members of section groups, they have to have the
8062 if (strcmp (elf_group_name (sec1
), elf_group_name (sec2
)) != 0)
8066 shndx1
= _bfd_elf_section_from_bfd_section (bfd1
, sec1
);
8067 shndx2
= _bfd_elf_section_from_bfd_section (bfd2
, sec2
);
8068 if (shndx1
== -1 || shndx2
== -1)
8071 bed1
= get_elf_backend_data (bfd1
);
8072 bed2
= get_elf_backend_data (bfd2
);
8073 hdr1
= &elf_tdata (bfd1
)->symtab_hdr
;
8074 symcount1
= hdr1
->sh_size
/ bed1
->s
->sizeof_sym
;
8075 hdr2
= &elf_tdata (bfd2
)->symtab_hdr
;
8076 symcount2
= hdr2
->sh_size
/ bed2
->s
->sizeof_sym
;
8078 if (symcount1
== 0 || symcount2
== 0)
8081 isymbuf1
= bfd_elf_get_elf_syms (bfd1
, hdr1
, symcount1
, 0,
8083 isymbuf2
= bfd_elf_get_elf_syms (bfd2
, hdr2
, symcount2
, 0,
8087 if (isymbuf1
== NULL
|| isymbuf2
== NULL
)
8090 /* Sort symbols by binding and section. Global definitions are at
8092 qsort (isymbuf1
, symcount1
, sizeof (Elf_Internal_Sym
),
8093 elf_sort_elf_symbol
);
8094 qsort (isymbuf2
, symcount2
, sizeof (Elf_Internal_Sym
),
8095 elf_sort_elf_symbol
);
8097 /* Count definitions in the section. */
8099 for (isym
= isymbuf1
, isymend
= isym
+ symcount1
;
8100 isym
< isymend
; isym
++)
8102 if (isym
->st_shndx
== (unsigned int) shndx1
)
8109 if (count1
&& isym
->st_shndx
!= (unsigned int) shndx1
)
8114 for (isym
= isymbuf2
, isymend
= isym
+ symcount2
;
8115 isym
< isymend
; isym
++)
8117 if (isym
->st_shndx
== (unsigned int) shndx2
)
8124 if (count2
&& isym
->st_shndx
!= (unsigned int) shndx2
)
8128 if (count1
== 0 || count2
== 0 || count1
!= count2
)
8131 symtable1
= bfd_malloc (count1
* sizeof (struct elf_symbol
));
8132 symtable2
= bfd_malloc (count1
* sizeof (struct elf_symbol
));
8134 if (symtable1
== NULL
|| symtable2
== NULL
)
8138 for (isym
= isymstart1
, isymend
= isym
+ count1
;
8139 isym
< isymend
; isym
++)
8142 symp
->name
= bfd_elf_string_from_elf_section (bfd1
,
8149 for (isym
= isymstart2
, isymend
= isym
+ count1
;
8150 isym
< isymend
; isym
++)
8153 symp
->name
= bfd_elf_string_from_elf_section (bfd2
,
8159 /* Sort symbol by name. */
8160 qsort (symtable1
, count1
, sizeof (struct elf_symbol
),
8161 elf_sym_name_compare
);
8162 qsort (symtable2
, count1
, sizeof (struct elf_symbol
),
8163 elf_sym_name_compare
);
8165 for (i
= 0; i
< count1
; i
++)
8166 /* Two symbols must have the same binding, type and name. */
8167 if (symtable1
[i
].sym
->st_info
!= symtable2
[i
].sym
->st_info
8168 || symtable1
[i
].sym
->st_other
!= symtable2
[i
].sym
->st_other
8169 || strcmp (symtable1
[i
].name
, symtable2
[i
].name
) != 0)