1 /* ELF executable support for BFD.
3 Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
4 2002, 2003, 2004, 2005, 2006, 2007 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 3 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., 51 Franklin Street - Fifth Floor, Boston,
21 MA 02110-1301, USA. */
28 BFD support for ELF formats is being worked on.
29 Currently, the best supported back ends are for sparc and i386
30 (running svr4 or Solaris 2).
32 Documentation of the internals of the support code still needs
33 to be written. The code is changing quickly enough that we
34 haven't bothered yet. */
36 /* For sparc64-cross-sparc32. */
44 #include "libiberty.h"
45 #include "safe-ctype.h"
47 static int elf_sort_sections (const void *, const void *);
48 static bfd_boolean
assign_file_positions_except_relocs (bfd
*, struct bfd_link_info
*);
49 static bfd_boolean
prep_headers (bfd
*);
50 static bfd_boolean
swap_out_syms (bfd
*, struct bfd_strtab_hash
**, int) ;
51 static bfd_boolean
elfcore_read_notes (bfd
*, file_ptr
, bfd_size_type
) ;
53 /* Swap version information in and out. The version information is
54 currently size independent. If that ever changes, this code will
55 need to move into elfcode.h. */
57 /* Swap in a Verdef structure. */
60 _bfd_elf_swap_verdef_in (bfd
*abfd
,
61 const Elf_External_Verdef
*src
,
62 Elf_Internal_Verdef
*dst
)
64 dst
->vd_version
= H_GET_16 (abfd
, src
->vd_version
);
65 dst
->vd_flags
= H_GET_16 (abfd
, src
->vd_flags
);
66 dst
->vd_ndx
= H_GET_16 (abfd
, src
->vd_ndx
);
67 dst
->vd_cnt
= H_GET_16 (abfd
, src
->vd_cnt
);
68 dst
->vd_hash
= H_GET_32 (abfd
, src
->vd_hash
);
69 dst
->vd_aux
= H_GET_32 (abfd
, src
->vd_aux
);
70 dst
->vd_next
= H_GET_32 (abfd
, src
->vd_next
);
73 /* Swap out a Verdef structure. */
76 _bfd_elf_swap_verdef_out (bfd
*abfd
,
77 const Elf_Internal_Verdef
*src
,
78 Elf_External_Verdef
*dst
)
80 H_PUT_16 (abfd
, src
->vd_version
, dst
->vd_version
);
81 H_PUT_16 (abfd
, src
->vd_flags
, dst
->vd_flags
);
82 H_PUT_16 (abfd
, src
->vd_ndx
, dst
->vd_ndx
);
83 H_PUT_16 (abfd
, src
->vd_cnt
, dst
->vd_cnt
);
84 H_PUT_32 (abfd
, src
->vd_hash
, dst
->vd_hash
);
85 H_PUT_32 (abfd
, src
->vd_aux
, dst
->vd_aux
);
86 H_PUT_32 (abfd
, src
->vd_next
, dst
->vd_next
);
89 /* Swap in a Verdaux structure. */
92 _bfd_elf_swap_verdaux_in (bfd
*abfd
,
93 const Elf_External_Verdaux
*src
,
94 Elf_Internal_Verdaux
*dst
)
96 dst
->vda_name
= H_GET_32 (abfd
, src
->vda_name
);
97 dst
->vda_next
= H_GET_32 (abfd
, src
->vda_next
);
100 /* Swap out a Verdaux structure. */
103 _bfd_elf_swap_verdaux_out (bfd
*abfd
,
104 const Elf_Internal_Verdaux
*src
,
105 Elf_External_Verdaux
*dst
)
107 H_PUT_32 (abfd
, src
->vda_name
, dst
->vda_name
);
108 H_PUT_32 (abfd
, src
->vda_next
, dst
->vda_next
);
111 /* Swap in a Verneed structure. */
114 _bfd_elf_swap_verneed_in (bfd
*abfd
,
115 const Elf_External_Verneed
*src
,
116 Elf_Internal_Verneed
*dst
)
118 dst
->vn_version
= H_GET_16 (abfd
, src
->vn_version
);
119 dst
->vn_cnt
= H_GET_16 (abfd
, src
->vn_cnt
);
120 dst
->vn_file
= H_GET_32 (abfd
, src
->vn_file
);
121 dst
->vn_aux
= H_GET_32 (abfd
, src
->vn_aux
);
122 dst
->vn_next
= H_GET_32 (abfd
, src
->vn_next
);
125 /* Swap out a Verneed structure. */
128 _bfd_elf_swap_verneed_out (bfd
*abfd
,
129 const Elf_Internal_Verneed
*src
,
130 Elf_External_Verneed
*dst
)
132 H_PUT_16 (abfd
, src
->vn_version
, dst
->vn_version
);
133 H_PUT_16 (abfd
, src
->vn_cnt
, dst
->vn_cnt
);
134 H_PUT_32 (abfd
, src
->vn_file
, dst
->vn_file
);
135 H_PUT_32 (abfd
, src
->vn_aux
, dst
->vn_aux
);
136 H_PUT_32 (abfd
, src
->vn_next
, dst
->vn_next
);
139 /* Swap in a Vernaux structure. */
142 _bfd_elf_swap_vernaux_in (bfd
*abfd
,
143 const Elf_External_Vernaux
*src
,
144 Elf_Internal_Vernaux
*dst
)
146 dst
->vna_hash
= H_GET_32 (abfd
, src
->vna_hash
);
147 dst
->vna_flags
= H_GET_16 (abfd
, src
->vna_flags
);
148 dst
->vna_other
= H_GET_16 (abfd
, src
->vna_other
);
149 dst
->vna_name
= H_GET_32 (abfd
, src
->vna_name
);
150 dst
->vna_next
= H_GET_32 (abfd
, src
->vna_next
);
153 /* Swap out a Vernaux structure. */
156 _bfd_elf_swap_vernaux_out (bfd
*abfd
,
157 const Elf_Internal_Vernaux
*src
,
158 Elf_External_Vernaux
*dst
)
160 H_PUT_32 (abfd
, src
->vna_hash
, dst
->vna_hash
);
161 H_PUT_16 (abfd
, src
->vna_flags
, dst
->vna_flags
);
162 H_PUT_16 (abfd
, src
->vna_other
, dst
->vna_other
);
163 H_PUT_32 (abfd
, src
->vna_name
, dst
->vna_name
);
164 H_PUT_32 (abfd
, src
->vna_next
, dst
->vna_next
);
167 /* Swap in a Versym structure. */
170 _bfd_elf_swap_versym_in (bfd
*abfd
,
171 const Elf_External_Versym
*src
,
172 Elf_Internal_Versym
*dst
)
174 dst
->vs_vers
= H_GET_16 (abfd
, src
->vs_vers
);
177 /* Swap out a Versym structure. */
180 _bfd_elf_swap_versym_out (bfd
*abfd
,
181 const Elf_Internal_Versym
*src
,
182 Elf_External_Versym
*dst
)
184 H_PUT_16 (abfd
, src
->vs_vers
, dst
->vs_vers
);
187 /* Standard ELF hash function. Do not change this function; you will
188 cause invalid hash tables to be generated. */
191 bfd_elf_hash (const char *namearg
)
193 const unsigned char *name
= (const unsigned char *) namearg
;
198 while ((ch
= *name
++) != '\0')
201 if ((g
= (h
& 0xf0000000)) != 0)
204 /* The ELF ABI says `h &= ~g', but this is equivalent in
205 this case and on some machines one insn instead of two. */
209 return h
& 0xffffffff;
212 /* DT_GNU_HASH hash function. Do not change this function; you will
213 cause invalid hash tables to be generated. */
216 bfd_elf_gnu_hash (const char *namearg
)
218 const unsigned char *name
= (const unsigned char *) namearg
;
219 unsigned long h
= 5381;
222 while ((ch
= *name
++) != '\0')
223 h
= (h
<< 5) + h
+ ch
;
224 return h
& 0xffffffff;
228 bfd_elf_mkobject (bfd
*abfd
)
230 if (abfd
->tdata
.any
== NULL
)
232 abfd
->tdata
.any
= bfd_zalloc (abfd
, sizeof (struct elf_obj_tdata
));
233 if (abfd
->tdata
.any
== NULL
)
237 elf_tdata (abfd
)->program_header_size
= (bfd_size_type
) -1;
243 bfd_elf_mkcorefile (bfd
*abfd
)
245 /* I think this can be done just like an object file. */
246 return bfd_elf_mkobject (abfd
);
250 bfd_elf_get_str_section (bfd
*abfd
, unsigned int shindex
)
252 Elf_Internal_Shdr
**i_shdrp
;
253 bfd_byte
*shstrtab
= NULL
;
255 bfd_size_type shstrtabsize
;
257 i_shdrp
= elf_elfsections (abfd
);
259 || shindex
>= elf_numsections (abfd
)
260 || i_shdrp
[shindex
] == 0)
263 shstrtab
= i_shdrp
[shindex
]->contents
;
264 if (shstrtab
== NULL
)
266 /* No cached one, attempt to read, and cache what we read. */
267 offset
= i_shdrp
[shindex
]->sh_offset
;
268 shstrtabsize
= i_shdrp
[shindex
]->sh_size
;
270 /* Allocate and clear an extra byte at the end, to prevent crashes
271 in case the string table is not terminated. */
272 if (shstrtabsize
+ 1 == 0
273 || (shstrtab
= bfd_alloc (abfd
, shstrtabsize
+ 1)) == NULL
274 || bfd_seek (abfd
, offset
, SEEK_SET
) != 0)
276 else if (bfd_bread (shstrtab
, shstrtabsize
, abfd
) != shstrtabsize
)
278 if (bfd_get_error () != bfd_error_system_call
)
279 bfd_set_error (bfd_error_file_truncated
);
283 shstrtab
[shstrtabsize
] = '\0';
284 i_shdrp
[shindex
]->contents
= shstrtab
;
286 return (char *) shstrtab
;
290 bfd_elf_string_from_elf_section (bfd
*abfd
,
291 unsigned int shindex
,
292 unsigned int strindex
)
294 Elf_Internal_Shdr
*hdr
;
299 if (elf_elfsections (abfd
) == NULL
|| shindex
>= elf_numsections (abfd
))
302 hdr
= elf_elfsections (abfd
)[shindex
];
304 if (hdr
->contents
== NULL
305 && bfd_elf_get_str_section (abfd
, shindex
) == NULL
)
308 if (strindex
>= hdr
->sh_size
)
310 unsigned int shstrndx
= elf_elfheader(abfd
)->e_shstrndx
;
311 (*_bfd_error_handler
)
312 (_("%B: invalid string offset %u >= %lu for section `%s'"),
313 abfd
, strindex
, (unsigned long) hdr
->sh_size
,
314 (shindex
== shstrndx
&& strindex
== hdr
->sh_name
316 : bfd_elf_string_from_elf_section (abfd
, shstrndx
, hdr
->sh_name
)));
320 return ((char *) hdr
->contents
) + strindex
;
323 /* Read and convert symbols to internal format.
324 SYMCOUNT specifies the number of symbols to read, starting from
325 symbol SYMOFFSET. If any of INTSYM_BUF, EXTSYM_BUF or EXTSHNDX_BUF
326 are non-NULL, they are used to store the internal symbols, external
327 symbols, and symbol section index extensions, respectively. */
330 bfd_elf_get_elf_syms (bfd
*ibfd
,
331 Elf_Internal_Shdr
*symtab_hdr
,
334 Elf_Internal_Sym
*intsym_buf
,
336 Elf_External_Sym_Shndx
*extshndx_buf
)
338 Elf_Internal_Shdr
*shndx_hdr
;
340 const bfd_byte
*esym
;
341 Elf_External_Sym_Shndx
*alloc_extshndx
;
342 Elf_External_Sym_Shndx
*shndx
;
343 Elf_Internal_Sym
*isym
;
344 Elf_Internal_Sym
*isymend
;
345 const struct elf_backend_data
*bed
;
353 /* Normal syms might have section extension entries. */
355 if (symtab_hdr
== &elf_tdata (ibfd
)->symtab_hdr
)
356 shndx_hdr
= &elf_tdata (ibfd
)->symtab_shndx_hdr
;
358 /* Read the symbols. */
360 alloc_extshndx
= NULL
;
361 bed
= get_elf_backend_data (ibfd
);
362 extsym_size
= bed
->s
->sizeof_sym
;
363 amt
= symcount
* extsym_size
;
364 pos
= symtab_hdr
->sh_offset
+ symoffset
* extsym_size
;
365 if (extsym_buf
== NULL
)
367 alloc_ext
= bfd_malloc2 (symcount
, extsym_size
);
368 extsym_buf
= alloc_ext
;
370 if (extsym_buf
== NULL
371 || bfd_seek (ibfd
, pos
, SEEK_SET
) != 0
372 || bfd_bread (extsym_buf
, amt
, ibfd
) != amt
)
378 if (shndx_hdr
== NULL
|| shndx_hdr
->sh_size
== 0)
382 amt
= symcount
* sizeof (Elf_External_Sym_Shndx
);
383 pos
= shndx_hdr
->sh_offset
+ symoffset
* sizeof (Elf_External_Sym_Shndx
);
384 if (extshndx_buf
== NULL
)
386 alloc_extshndx
= bfd_malloc2 (symcount
,
387 sizeof (Elf_External_Sym_Shndx
));
388 extshndx_buf
= alloc_extshndx
;
390 if (extshndx_buf
== NULL
391 || bfd_seek (ibfd
, pos
, SEEK_SET
) != 0
392 || bfd_bread (extshndx_buf
, amt
, ibfd
) != amt
)
399 if (intsym_buf
== NULL
)
401 intsym_buf
= bfd_malloc2 (symcount
, sizeof (Elf_Internal_Sym
));
402 if (intsym_buf
== NULL
)
406 /* Convert the symbols to internal form. */
407 isymend
= intsym_buf
+ symcount
;
408 for (esym
= extsym_buf
, isym
= intsym_buf
, shndx
= extshndx_buf
;
410 esym
+= extsym_size
, isym
++, shndx
= shndx
!= NULL
? shndx
+ 1 : NULL
)
411 if (!(*bed
->s
->swap_symbol_in
) (ibfd
, esym
, shndx
, isym
))
413 symoffset
+= (esym
- (bfd_byte
*) extsym_buf
) / extsym_size
;
414 (*_bfd_error_handler
) (_("%B symbol number %lu references "
415 "nonexistent SHT_SYMTAB_SHNDX section"),
416 ibfd
, (unsigned long) symoffset
);
422 if (alloc_ext
!= NULL
)
424 if (alloc_extshndx
!= NULL
)
425 free (alloc_extshndx
);
430 /* Look up a symbol name. */
432 bfd_elf_sym_name (bfd
*abfd
,
433 Elf_Internal_Shdr
*symtab_hdr
,
434 Elf_Internal_Sym
*isym
,
438 unsigned int iname
= isym
->st_name
;
439 unsigned int shindex
= symtab_hdr
->sh_link
;
441 if (iname
== 0 && ELF_ST_TYPE (isym
->st_info
) == STT_SECTION
442 /* Check for a bogus st_shndx to avoid crashing. */
443 && isym
->st_shndx
< elf_numsections (abfd
)
444 && !(isym
->st_shndx
>= SHN_LORESERVE
&& isym
->st_shndx
<= SHN_HIRESERVE
))
446 iname
= elf_elfsections (abfd
)[isym
->st_shndx
]->sh_name
;
447 shindex
= elf_elfheader (abfd
)->e_shstrndx
;
450 name
= bfd_elf_string_from_elf_section (abfd
, shindex
, iname
);
453 else if (sym_sec
&& *name
== '\0')
454 name
= bfd_section_name (abfd
, sym_sec
);
459 /* Elf_Internal_Shdr->contents is an array of these for SHT_GROUP
460 sections. The first element is the flags, the rest are section
463 typedef union elf_internal_group
{
464 Elf_Internal_Shdr
*shdr
;
466 } Elf_Internal_Group
;
468 /* Return the name of the group signature symbol. Why isn't the
469 signature just a string? */
472 group_signature (bfd
*abfd
, Elf_Internal_Shdr
*ghdr
)
474 Elf_Internal_Shdr
*hdr
;
475 unsigned char esym
[sizeof (Elf64_External_Sym
)];
476 Elf_External_Sym_Shndx eshndx
;
477 Elf_Internal_Sym isym
;
479 /* First we need to ensure the symbol table is available. Make sure
480 that it is a symbol table section. */
481 hdr
= elf_elfsections (abfd
) [ghdr
->sh_link
];
482 if (hdr
->sh_type
!= SHT_SYMTAB
483 || ! bfd_section_from_shdr (abfd
, ghdr
->sh_link
))
486 /* Go read the symbol. */
487 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
488 if (bfd_elf_get_elf_syms (abfd
, hdr
, 1, ghdr
->sh_info
,
489 &isym
, esym
, &eshndx
) == NULL
)
492 return bfd_elf_sym_name (abfd
, hdr
, &isym
, NULL
);
495 /* Set next_in_group list pointer, and group name for NEWSECT. */
498 setup_group (bfd
*abfd
, Elf_Internal_Shdr
*hdr
, asection
*newsect
)
500 unsigned int num_group
= elf_tdata (abfd
)->num_group
;
502 /* If num_group is zero, read in all SHT_GROUP sections. The count
503 is set to -1 if there are no SHT_GROUP sections. */
506 unsigned int i
, shnum
;
508 /* First count the number of groups. If we have a SHT_GROUP
509 section with just a flag word (ie. sh_size is 4), ignore it. */
510 shnum
= elf_numsections (abfd
);
513 #define IS_VALID_GROUP_SECTION_HEADER(shdr) \
514 ( (shdr)->sh_type == SHT_GROUP \
515 && (shdr)->sh_size >= (2 * GRP_ENTRY_SIZE) \
516 && (shdr)->sh_entsize == GRP_ENTRY_SIZE \
517 && ((shdr)->sh_size % GRP_ENTRY_SIZE) == 0)
519 for (i
= 0; i
< shnum
; i
++)
521 Elf_Internal_Shdr
*shdr
= elf_elfsections (abfd
)[i
];
523 if (IS_VALID_GROUP_SECTION_HEADER (shdr
))
529 num_group
= (unsigned) -1;
530 elf_tdata (abfd
)->num_group
= num_group
;
534 /* We keep a list of elf section headers for group sections,
535 so we can find them quickly. */
538 elf_tdata (abfd
)->num_group
= num_group
;
539 elf_tdata (abfd
)->group_sect_ptr
540 = bfd_alloc2 (abfd
, num_group
, sizeof (Elf_Internal_Shdr
*));
541 if (elf_tdata (abfd
)->group_sect_ptr
== NULL
)
545 for (i
= 0; i
< shnum
; i
++)
547 Elf_Internal_Shdr
*shdr
= elf_elfsections (abfd
)[i
];
549 if (IS_VALID_GROUP_SECTION_HEADER (shdr
))
552 Elf_Internal_Group
*dest
;
554 /* Add to list of sections. */
555 elf_tdata (abfd
)->group_sect_ptr
[num_group
] = shdr
;
558 /* Read the raw contents. */
559 BFD_ASSERT (sizeof (*dest
) >= 4);
560 amt
= shdr
->sh_size
* sizeof (*dest
) / 4;
561 shdr
->contents
= bfd_alloc2 (abfd
, shdr
->sh_size
,
563 /* PR binutils/4110: Handle corrupt group headers. */
564 if (shdr
->contents
== NULL
)
567 (_("%B: Corrupt size field in group section header: 0x%lx"), abfd
, shdr
->sh_size
);
568 bfd_set_error (bfd_error_bad_value
);
572 memset (shdr
->contents
, 0, amt
);
574 if (bfd_seek (abfd
, shdr
->sh_offset
, SEEK_SET
) != 0
575 || (bfd_bread (shdr
->contents
, shdr
->sh_size
, abfd
)
579 /* Translate raw contents, a flag word followed by an
580 array of elf section indices all in target byte order,
581 to the flag word followed by an array of elf section
583 src
= shdr
->contents
+ shdr
->sh_size
;
584 dest
= (Elf_Internal_Group
*) (shdr
->contents
+ amt
);
591 idx
= H_GET_32 (abfd
, src
);
592 if (src
== shdr
->contents
)
595 if (shdr
->bfd_section
!= NULL
&& (idx
& GRP_COMDAT
))
596 shdr
->bfd_section
->flags
597 |= SEC_LINK_ONCE
| SEC_LINK_DUPLICATES_DISCARD
;
602 ((*_bfd_error_handler
)
603 (_("%B: invalid SHT_GROUP entry"), abfd
));
606 dest
->shdr
= elf_elfsections (abfd
)[idx
];
613 if (num_group
!= (unsigned) -1)
617 for (i
= 0; i
< num_group
; i
++)
619 Elf_Internal_Shdr
*shdr
= elf_tdata (abfd
)->group_sect_ptr
[i
];
620 Elf_Internal_Group
*idx
= (Elf_Internal_Group
*) shdr
->contents
;
621 unsigned int n_elt
= shdr
->sh_size
/ 4;
623 /* Look through this group's sections to see if current
624 section is a member. */
626 if ((++idx
)->shdr
== hdr
)
630 /* We are a member of this group. Go looking through
631 other members to see if any others are linked via
633 idx
= (Elf_Internal_Group
*) shdr
->contents
;
634 n_elt
= shdr
->sh_size
/ 4;
636 if ((s
= (++idx
)->shdr
->bfd_section
) != NULL
637 && elf_next_in_group (s
) != NULL
)
641 /* Snarf the group name from other member, and
642 insert current section in circular list. */
643 elf_group_name (newsect
) = elf_group_name (s
);
644 elf_next_in_group (newsect
) = elf_next_in_group (s
);
645 elf_next_in_group (s
) = newsect
;
651 gname
= group_signature (abfd
, shdr
);
654 elf_group_name (newsect
) = gname
;
656 /* Start a circular list with one element. */
657 elf_next_in_group (newsect
) = newsect
;
660 /* If the group section has been created, point to the
662 if (shdr
->bfd_section
!= NULL
)
663 elf_next_in_group (shdr
->bfd_section
) = newsect
;
671 if (elf_group_name (newsect
) == NULL
)
673 (*_bfd_error_handler
) (_("%B: no group info for section %A"),
680 _bfd_elf_setup_sections (bfd
*abfd
)
683 unsigned int num_group
= elf_tdata (abfd
)->num_group
;
684 bfd_boolean result
= TRUE
;
687 /* Process SHF_LINK_ORDER. */
688 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
690 Elf_Internal_Shdr
*this_hdr
= &elf_section_data (s
)->this_hdr
;
691 if ((this_hdr
->sh_flags
& SHF_LINK_ORDER
) != 0)
693 unsigned int elfsec
= this_hdr
->sh_link
;
694 /* FIXME: The old Intel compiler and old strip/objcopy may
695 not set the sh_link or sh_info fields. Hence we could
696 get the situation where elfsec is 0. */
699 const struct elf_backend_data
*bed
700 = get_elf_backend_data (abfd
);
701 if (bed
->link_order_error_handler
)
702 bed
->link_order_error_handler
703 (_("%B: warning: sh_link not set for section `%A'"),
710 this_hdr
= elf_elfsections (abfd
)[elfsec
];
713 Some strip/objcopy may leave an incorrect value in
714 sh_link. We don't want to proceed. */
715 link
= this_hdr
->bfd_section
;
718 (*_bfd_error_handler
)
719 (_("%B: sh_link [%d] in section `%A' is incorrect"),
720 s
->owner
, s
, elfsec
);
724 elf_linked_to_section (s
) = link
;
729 /* Process section groups. */
730 if (num_group
== (unsigned) -1)
733 for (i
= 0; i
< num_group
; i
++)
735 Elf_Internal_Shdr
*shdr
= elf_tdata (abfd
)->group_sect_ptr
[i
];
736 Elf_Internal_Group
*idx
= (Elf_Internal_Group
*) shdr
->contents
;
737 unsigned int n_elt
= shdr
->sh_size
/ 4;
740 if ((++idx
)->shdr
->bfd_section
)
741 elf_sec_group (idx
->shdr
->bfd_section
) = shdr
->bfd_section
;
742 else if (idx
->shdr
->sh_type
== SHT_RELA
743 || idx
->shdr
->sh_type
== SHT_REL
)
744 /* We won't include relocation sections in section groups in
745 output object files. We adjust the group section size here
746 so that relocatable link will work correctly when
747 relocation sections are in section group in input object
749 shdr
->bfd_section
->size
-= 4;
752 /* There are some unknown sections in the group. */
753 (*_bfd_error_handler
)
754 (_("%B: unknown [%d] section `%s' in group [%s]"),
756 (unsigned int) idx
->shdr
->sh_type
,
757 bfd_elf_string_from_elf_section (abfd
,
758 (elf_elfheader (abfd
)
761 shdr
->bfd_section
->name
);
769 bfd_elf_is_group_section (bfd
*abfd ATTRIBUTE_UNUSED
, const asection
*sec
)
771 return elf_next_in_group (sec
) != NULL
;
774 /* Make a BFD section from an ELF section. We store a pointer to the
775 BFD section in the bfd_section field of the header. */
778 _bfd_elf_make_section_from_shdr (bfd
*abfd
,
779 Elf_Internal_Shdr
*hdr
,
785 const struct elf_backend_data
*bed
;
787 if (hdr
->bfd_section
!= NULL
)
789 BFD_ASSERT (strcmp (name
,
790 bfd_get_section_name (abfd
, hdr
->bfd_section
)) == 0);
794 newsect
= bfd_make_section_anyway (abfd
, name
);
798 hdr
->bfd_section
= newsect
;
799 elf_section_data (newsect
)->this_hdr
= *hdr
;
800 elf_section_data (newsect
)->this_idx
= shindex
;
802 /* Always use the real type/flags. */
803 elf_section_type (newsect
) = hdr
->sh_type
;
804 elf_section_flags (newsect
) = hdr
->sh_flags
;
806 newsect
->filepos
= hdr
->sh_offset
;
808 if (! bfd_set_section_vma (abfd
, newsect
, hdr
->sh_addr
)
809 || ! bfd_set_section_size (abfd
, newsect
, hdr
->sh_size
)
810 || ! bfd_set_section_alignment (abfd
, newsect
,
811 bfd_log2 ((bfd_vma
) hdr
->sh_addralign
)))
814 flags
= SEC_NO_FLAGS
;
815 if (hdr
->sh_type
!= SHT_NOBITS
)
816 flags
|= SEC_HAS_CONTENTS
;
817 if (hdr
->sh_type
== SHT_GROUP
)
818 flags
|= SEC_GROUP
| SEC_EXCLUDE
;
819 if ((hdr
->sh_flags
& SHF_ALLOC
) != 0)
822 if (hdr
->sh_type
!= SHT_NOBITS
)
825 if ((hdr
->sh_flags
& SHF_WRITE
) == 0)
826 flags
|= SEC_READONLY
;
827 if ((hdr
->sh_flags
& SHF_EXECINSTR
) != 0)
829 else if ((flags
& SEC_LOAD
) != 0)
831 if ((hdr
->sh_flags
& SHF_MERGE
) != 0)
834 newsect
->entsize
= hdr
->sh_entsize
;
835 if ((hdr
->sh_flags
& SHF_STRINGS
) != 0)
836 flags
|= SEC_STRINGS
;
838 if (hdr
->sh_flags
& SHF_GROUP
)
839 if (!setup_group (abfd
, hdr
, newsect
))
841 if ((hdr
->sh_flags
& SHF_TLS
) != 0)
842 flags
|= SEC_THREAD_LOCAL
;
844 if ((flags
& SEC_ALLOC
) == 0)
846 /* The debugging sections appear to be recognized only by name,
847 not any sort of flag. Their SEC_ALLOC bits are cleared. */
852 } debug_sections
[] =
854 { STRING_COMMA_LEN ("debug") }, /* 'd' */
855 { NULL
, 0 }, /* 'e' */
856 { NULL
, 0 }, /* 'f' */
857 { STRING_COMMA_LEN ("gnu.linkonce.wi.") }, /* 'g' */
858 { NULL
, 0 }, /* 'h' */
859 { NULL
, 0 }, /* 'i' */
860 { NULL
, 0 }, /* 'j' */
861 { NULL
, 0 }, /* 'k' */
862 { STRING_COMMA_LEN ("line") }, /* 'l' */
863 { NULL
, 0 }, /* 'm' */
864 { NULL
, 0 }, /* 'n' */
865 { NULL
, 0 }, /* 'o' */
866 { NULL
, 0 }, /* 'p' */
867 { NULL
, 0 }, /* 'q' */
868 { NULL
, 0 }, /* 'r' */
869 { STRING_COMMA_LEN ("stab") } /* 's' */
874 int i
= name
[1] - 'd';
876 && i
< (int) ARRAY_SIZE (debug_sections
)
877 && debug_sections
[i
].name
!= NULL
878 && strncmp (&name
[1], debug_sections
[i
].name
,
879 debug_sections
[i
].len
) == 0)
880 flags
|= SEC_DEBUGGING
;
884 /* As a GNU extension, if the name begins with .gnu.linkonce, we
885 only link a single copy of the section. This is used to support
886 g++. g++ will emit each template expansion in its own section.
887 The symbols will be defined as weak, so that multiple definitions
888 are permitted. The GNU linker extension is to actually discard
889 all but one of the sections. */
890 if (CONST_STRNEQ (name
, ".gnu.linkonce")
891 && elf_next_in_group (newsect
) == NULL
)
892 flags
|= SEC_LINK_ONCE
| SEC_LINK_DUPLICATES_DISCARD
;
894 bed
= get_elf_backend_data (abfd
);
895 if (bed
->elf_backend_section_flags
)
896 if (! bed
->elf_backend_section_flags (&flags
, hdr
))
899 if (! bfd_set_section_flags (abfd
, newsect
, flags
))
902 if ((flags
& SEC_ALLOC
) != 0)
904 Elf_Internal_Phdr
*phdr
;
907 /* Look through the phdrs to see if we need to adjust the lma.
908 If all the p_paddr fields are zero, we ignore them, since
909 some ELF linkers produce such output. */
910 phdr
= elf_tdata (abfd
)->phdr
;
911 for (i
= 0; i
< elf_elfheader (abfd
)->e_phnum
; i
++, phdr
++)
913 if (phdr
->p_paddr
!= 0)
916 if (i
< elf_elfheader (abfd
)->e_phnum
)
918 phdr
= elf_tdata (abfd
)->phdr
;
919 for (i
= 0; i
< elf_elfheader (abfd
)->e_phnum
; i
++, phdr
++)
921 /* This section is part of this segment if its file
922 offset plus size lies within the segment's memory
923 span and, if the section is loaded, the extent of the
924 loaded data lies within the extent of the segment.
926 Note - we used to check the p_paddr field as well, and
927 refuse to set the LMA if it was 0. This is wrong
928 though, as a perfectly valid initialised segment can
929 have a p_paddr of zero. Some architectures, eg ARM,
930 place special significance on the address 0 and
931 executables need to be able to have a segment which
932 covers this address. */
933 if (phdr
->p_type
== PT_LOAD
934 && (bfd_vma
) hdr
->sh_offset
>= phdr
->p_offset
935 && (hdr
->sh_offset
+ hdr
->sh_size
936 <= phdr
->p_offset
+ phdr
->p_memsz
)
937 && ((flags
& SEC_LOAD
) == 0
938 || (hdr
->sh_offset
+ hdr
->sh_size
939 <= phdr
->p_offset
+ phdr
->p_filesz
)))
941 if ((flags
& SEC_LOAD
) == 0)
942 newsect
->lma
= (phdr
->p_paddr
943 + hdr
->sh_addr
- phdr
->p_vaddr
);
945 /* We used to use the same adjustment for SEC_LOAD
946 sections, but that doesn't work if the segment
947 is packed with code from multiple VMAs.
948 Instead we calculate the section LMA based on
949 the segment LMA. It is assumed that the
950 segment will contain sections with contiguous
951 LMAs, even if the VMAs are not. */
952 newsect
->lma
= (phdr
->p_paddr
953 + hdr
->sh_offset
- phdr
->p_offset
);
955 /* With contiguous segments, we can't tell from file
956 offsets whether a section with zero size should
957 be placed at the end of one segment or the
958 beginning of the next. Decide based on vaddr. */
959 if (hdr
->sh_addr
>= phdr
->p_vaddr
960 && (hdr
->sh_addr
+ hdr
->sh_size
961 <= phdr
->p_vaddr
+ phdr
->p_memsz
))
976 struct elf_internal_shdr *bfd_elf_find_section (bfd *abfd, char *name);
979 Helper functions for GDB to locate the string tables.
980 Since BFD hides string tables from callers, GDB needs to use an
981 internal hook to find them. Sun's .stabstr, in particular,
982 isn't even pointed to by the .stab section, so ordinary
983 mechanisms wouldn't work to find it, even if we had some.
986 struct elf_internal_shdr
*
987 bfd_elf_find_section (bfd
*abfd
, char *name
)
989 Elf_Internal_Shdr
**i_shdrp
;
994 i_shdrp
= elf_elfsections (abfd
);
997 shstrtab
= bfd_elf_get_str_section (abfd
,
998 elf_elfheader (abfd
)->e_shstrndx
);
999 if (shstrtab
!= NULL
)
1001 max
= elf_numsections (abfd
);
1002 for (i
= 1; i
< max
; i
++)
1003 if (!strcmp (&shstrtab
[i_shdrp
[i
]->sh_name
], name
))
1010 const char *const bfd_elf_section_type_names
[] = {
1011 "SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB",
1012 "SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE",
1013 "SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM",
1016 /* ELF relocs are against symbols. If we are producing relocatable
1017 output, and the reloc is against an external symbol, and nothing
1018 has given us any additional addend, the resulting reloc will also
1019 be against the same symbol. In such a case, we don't want to
1020 change anything about the way the reloc is handled, since it will
1021 all be done at final link time. Rather than put special case code
1022 into bfd_perform_relocation, all the reloc types use this howto
1023 function. It just short circuits the reloc if producing
1024 relocatable output against an external symbol. */
1026 bfd_reloc_status_type
1027 bfd_elf_generic_reloc (bfd
*abfd ATTRIBUTE_UNUSED
,
1028 arelent
*reloc_entry
,
1030 void *data ATTRIBUTE_UNUSED
,
1031 asection
*input_section
,
1033 char **error_message ATTRIBUTE_UNUSED
)
1035 if (output_bfd
!= NULL
1036 && (symbol
->flags
& BSF_SECTION_SYM
) == 0
1037 && (! reloc_entry
->howto
->partial_inplace
1038 || reloc_entry
->addend
== 0))
1040 reloc_entry
->address
+= input_section
->output_offset
;
1041 return bfd_reloc_ok
;
1044 return bfd_reloc_continue
;
1047 /* Copy the program header and other data from one object module to
1051 _bfd_elf_copy_private_bfd_data (bfd
*ibfd
, bfd
*obfd
)
1053 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
1054 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
1057 BFD_ASSERT (!elf_flags_init (obfd
)
1058 || (elf_elfheader (obfd
)->e_flags
1059 == elf_elfheader (ibfd
)->e_flags
));
1061 elf_gp (obfd
) = elf_gp (ibfd
);
1062 elf_elfheader (obfd
)->e_flags
= elf_elfheader (ibfd
)->e_flags
;
1063 elf_flags_init (obfd
) = TRUE
;
1065 /* Copy object attributes. */
1066 _bfd_elf_copy_obj_attributes (ibfd
, obfd
);
1072 get_segment_type (unsigned int p_type
)
1077 case PT_NULL
: pt
= "NULL"; break;
1078 case PT_LOAD
: pt
= "LOAD"; break;
1079 case PT_DYNAMIC
: pt
= "DYNAMIC"; break;
1080 case PT_INTERP
: pt
= "INTERP"; break;
1081 case PT_NOTE
: pt
= "NOTE"; break;
1082 case PT_SHLIB
: pt
= "SHLIB"; break;
1083 case PT_PHDR
: pt
= "PHDR"; break;
1084 case PT_TLS
: pt
= "TLS"; break;
1085 case PT_GNU_EH_FRAME
: pt
= "EH_FRAME"; break;
1086 case PT_GNU_ATTR
: pt
= "ATTR"; break;
1087 case PT_GNU_RELRO
: pt
= "RELRO"; break;
1088 default: pt
= NULL
; break;
1093 /* Print out the program headers. */
1096 _bfd_elf_print_private_bfd_data (bfd
*abfd
, void *farg
)
1099 Elf_Internal_Phdr
*p
;
1101 bfd_byte
*dynbuf
= NULL
;
1103 p
= elf_tdata (abfd
)->phdr
;
1108 fprintf (f
, _("\nProgram Header:\n"));
1109 c
= elf_elfheader (abfd
)->e_phnum
;
1110 for (i
= 0; i
< c
; i
++, p
++)
1112 const char *pt
= get_segment_type (p
->p_type
);
1117 sprintf (buf
, "0x%lx", p
->p_type
);
1120 fprintf (f
, "%8s off 0x", pt
);
1121 bfd_fprintf_vma (abfd
, f
, p
->p_offset
);
1122 fprintf (f
, " vaddr 0x");
1123 bfd_fprintf_vma (abfd
, f
, p
->p_vaddr
);
1124 fprintf (f
, " paddr 0x");
1125 bfd_fprintf_vma (abfd
, f
, p
->p_paddr
);
1126 fprintf (f
, " align 2**%u\n", bfd_log2 (p
->p_align
));
1127 fprintf (f
, " filesz 0x");
1128 bfd_fprintf_vma (abfd
, f
, p
->p_filesz
);
1129 fprintf (f
, " memsz 0x");
1130 bfd_fprintf_vma (abfd
, f
, p
->p_memsz
);
1131 fprintf (f
, " flags %c%c%c",
1132 (p
->p_flags
& PF_R
) != 0 ? 'r' : '-',
1133 (p
->p_flags
& PF_W
) != 0 ? 'w' : '-',
1134 (p
->p_flags
& PF_X
) != 0 ? 'x' : '-');
1135 if ((p
->p_flags
&~ (unsigned) (PF_R
| PF_W
| PF_X
)) != 0)
1136 fprintf (f
, " %lx", p
->p_flags
&~ (unsigned) (PF_R
| PF_W
| PF_X
));
1141 s
= bfd_get_section_by_name (abfd
, ".dynamic");
1145 unsigned long shlink
;
1146 bfd_byte
*extdyn
, *extdynend
;
1148 void (*swap_dyn_in
) (bfd
*, const void *, Elf_Internal_Dyn
*);
1150 fprintf (f
, _("\nDynamic Section:\n"));
1152 if (!bfd_malloc_and_get_section (abfd
, s
, &dynbuf
))
1155 elfsec
= _bfd_elf_section_from_bfd_section (abfd
, s
);
1158 shlink
= elf_elfsections (abfd
)[elfsec
]->sh_link
;
1160 extdynsize
= get_elf_backend_data (abfd
)->s
->sizeof_dyn
;
1161 swap_dyn_in
= get_elf_backend_data (abfd
)->s
->swap_dyn_in
;
1164 extdynend
= extdyn
+ s
->size
;
1165 for (; extdyn
< extdynend
; extdyn
+= extdynsize
)
1167 Elf_Internal_Dyn dyn
;
1170 bfd_boolean stringp
;
1172 (*swap_dyn_in
) (abfd
, extdyn
, &dyn
);
1174 if (dyn
.d_tag
== DT_NULL
)
1181 sprintf (ab
, "0x%lx", (unsigned long) dyn
.d_tag
);
1185 case DT_NEEDED
: name
= "NEEDED"; stringp
= TRUE
; break;
1186 case DT_PLTRELSZ
: name
= "PLTRELSZ"; break;
1187 case DT_PLTGOT
: name
= "PLTGOT"; break;
1188 case DT_HASH
: name
= "HASH"; break;
1189 case DT_STRTAB
: name
= "STRTAB"; break;
1190 case DT_SYMTAB
: name
= "SYMTAB"; break;
1191 case DT_RELA
: name
= "RELA"; break;
1192 case DT_RELASZ
: name
= "RELASZ"; break;
1193 case DT_RELAENT
: name
= "RELAENT"; break;
1194 case DT_STRSZ
: name
= "STRSZ"; break;
1195 case DT_SYMENT
: name
= "SYMENT"; break;
1196 case DT_INIT
: name
= "INIT"; break;
1197 case DT_FINI
: name
= "FINI"; break;
1198 case DT_SONAME
: name
= "SONAME"; stringp
= TRUE
; break;
1199 case DT_RPATH
: name
= "RPATH"; stringp
= TRUE
; break;
1200 case DT_SYMBOLIC
: name
= "SYMBOLIC"; break;
1201 case DT_REL
: name
= "REL"; break;
1202 case DT_RELSZ
: name
= "RELSZ"; break;
1203 case DT_RELENT
: name
= "RELENT"; break;
1204 case DT_PLTREL
: name
= "PLTREL"; break;
1205 case DT_DEBUG
: name
= "DEBUG"; break;
1206 case DT_TEXTREL
: name
= "TEXTREL"; break;
1207 case DT_JMPREL
: name
= "JMPREL"; break;
1208 case DT_BIND_NOW
: name
= "BIND_NOW"; break;
1209 case DT_INIT_ARRAY
: name
= "INIT_ARRAY"; break;
1210 case DT_FINI_ARRAY
: name
= "FINI_ARRAY"; break;
1211 case DT_INIT_ARRAYSZ
: name
= "INIT_ARRAYSZ"; break;
1212 case DT_FINI_ARRAYSZ
: name
= "FINI_ARRAYSZ"; break;
1213 case DT_RUNPATH
: name
= "RUNPATH"; stringp
= TRUE
; break;
1214 case DT_FLAGS
: name
= "FLAGS"; break;
1215 case DT_PREINIT_ARRAY
: name
= "PREINIT_ARRAY"; break;
1216 case DT_PREINIT_ARRAYSZ
: name
= "PREINIT_ARRAYSZ"; break;
1217 case DT_CHECKSUM
: name
= "CHECKSUM"; break;
1218 case DT_PLTPADSZ
: name
= "PLTPADSZ"; break;
1219 case DT_MOVEENT
: name
= "MOVEENT"; break;
1220 case DT_MOVESZ
: name
= "MOVESZ"; break;
1221 case DT_FEATURE
: name
= "FEATURE"; break;
1222 case DT_POSFLAG_1
: name
= "POSFLAG_1"; break;
1223 case DT_SYMINSZ
: name
= "SYMINSZ"; break;
1224 case DT_SYMINENT
: name
= "SYMINENT"; break;
1225 case DT_CONFIG
: name
= "CONFIG"; stringp
= TRUE
; break;
1226 case DT_DEPAUDIT
: name
= "DEPAUDIT"; stringp
= TRUE
; break;
1227 case DT_AUDIT
: name
= "AUDIT"; stringp
= TRUE
; break;
1228 case DT_PLTPAD
: name
= "PLTPAD"; break;
1229 case DT_MOVETAB
: name
= "MOVETAB"; break;
1230 case DT_SYMINFO
: name
= "SYMINFO"; break;
1231 case DT_RELACOUNT
: name
= "RELACOUNT"; break;
1232 case DT_RELCOUNT
: name
= "RELCOUNT"; break;
1233 case DT_FLAGS_1
: name
= "FLAGS_1"; break;
1234 case DT_VERSYM
: name
= "VERSYM"; break;
1235 case DT_VERDEF
: name
= "VERDEF"; break;
1236 case DT_VERDEFNUM
: name
= "VERDEFNUM"; break;
1237 case DT_VERNEED
: name
= "VERNEED"; break;
1238 case DT_VERNEEDNUM
: name
= "VERNEEDNUM"; break;
1239 case DT_AUXILIARY
: name
= "AUXILIARY"; stringp
= TRUE
; break;
1240 case DT_USED
: name
= "USED"; break;
1241 case DT_FILTER
: name
= "FILTER"; stringp
= TRUE
; break;
1242 case DT_GNU_HASH
: name
= "GNU_HASH"; break;
1245 fprintf (f
, " %-11s ", name
);
1247 fprintf (f
, "0x%lx", (unsigned long) dyn
.d_un
.d_val
);
1251 unsigned int tagv
= dyn
.d_un
.d_val
;
1253 string
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
1256 fprintf (f
, "%s", string
);
1265 if ((elf_dynverdef (abfd
) != 0 && elf_tdata (abfd
)->verdef
== NULL
)
1266 || (elf_dynverref (abfd
) != 0 && elf_tdata (abfd
)->verref
== NULL
))
1268 if (! _bfd_elf_slurp_version_tables (abfd
, FALSE
))
1272 if (elf_dynverdef (abfd
) != 0)
1274 Elf_Internal_Verdef
*t
;
1276 fprintf (f
, _("\nVersion definitions:\n"));
1277 for (t
= elf_tdata (abfd
)->verdef
; t
!= NULL
; t
= t
->vd_nextdef
)
1279 fprintf (f
, "%d 0x%2.2x 0x%8.8lx %s\n", t
->vd_ndx
,
1280 t
->vd_flags
, t
->vd_hash
,
1281 t
->vd_nodename
? t
->vd_nodename
: "<corrupt>");
1282 if (t
->vd_auxptr
!= NULL
&& t
->vd_auxptr
->vda_nextptr
!= NULL
)
1284 Elf_Internal_Verdaux
*a
;
1287 for (a
= t
->vd_auxptr
->vda_nextptr
;
1291 a
->vda_nodename
? a
->vda_nodename
: "<corrupt>");
1297 if (elf_dynverref (abfd
) != 0)
1299 Elf_Internal_Verneed
*t
;
1301 fprintf (f
, _("\nVersion References:\n"));
1302 for (t
= elf_tdata (abfd
)->verref
; t
!= NULL
; t
= t
->vn_nextref
)
1304 Elf_Internal_Vernaux
*a
;
1306 fprintf (f
, _(" required from %s:\n"),
1307 t
->vn_filename
? t
->vn_filename
: "<corrupt>");
1308 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
1309 fprintf (f
, " 0x%8.8lx 0x%2.2x %2.2d %s\n", a
->vna_hash
,
1310 a
->vna_flags
, a
->vna_other
,
1311 a
->vna_nodename
? a
->vna_nodename
: "<corrupt>");
1323 /* Display ELF-specific fields of a symbol. */
1326 bfd_elf_print_symbol (bfd
*abfd
,
1329 bfd_print_symbol_type how
)
1334 case bfd_print_symbol_name
:
1335 fprintf (file
, "%s", symbol
->name
);
1337 case bfd_print_symbol_more
:
1338 fprintf (file
, "elf ");
1339 bfd_fprintf_vma (abfd
, file
, symbol
->value
);
1340 fprintf (file
, " %lx", (long) symbol
->flags
);
1342 case bfd_print_symbol_all
:
1344 const char *section_name
;
1345 const char *name
= NULL
;
1346 const struct elf_backend_data
*bed
;
1347 unsigned char st_other
;
1350 section_name
= symbol
->section
? symbol
->section
->name
: "(*none*)";
1352 bed
= get_elf_backend_data (abfd
);
1353 if (bed
->elf_backend_print_symbol_all
)
1354 name
= (*bed
->elf_backend_print_symbol_all
) (abfd
, filep
, symbol
);
1358 name
= symbol
->name
;
1359 bfd_print_symbol_vandf (abfd
, file
, symbol
);
1362 fprintf (file
, " %s\t", section_name
);
1363 /* Print the "other" value for a symbol. For common symbols,
1364 we've already printed the size; now print the alignment.
1365 For other symbols, we have no specified alignment, and
1366 we've printed the address; now print the size. */
1367 if (symbol
->section
&& bfd_is_com_section (symbol
->section
))
1368 val
= ((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_value
;
1370 val
= ((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_size
;
1371 bfd_fprintf_vma (abfd
, file
, val
);
1373 /* If we have version information, print it. */
1374 if (elf_tdata (abfd
)->dynversym_section
!= 0
1375 && (elf_tdata (abfd
)->dynverdef_section
!= 0
1376 || elf_tdata (abfd
)->dynverref_section
!= 0))
1378 unsigned int vernum
;
1379 const char *version_string
;
1381 vernum
= ((elf_symbol_type
*) symbol
)->version
& VERSYM_VERSION
;
1384 version_string
= "";
1385 else if (vernum
== 1)
1386 version_string
= "Base";
1387 else if (vernum
<= elf_tdata (abfd
)->cverdefs
)
1389 elf_tdata (abfd
)->verdef
[vernum
- 1].vd_nodename
;
1392 Elf_Internal_Verneed
*t
;
1394 version_string
= "";
1395 for (t
= elf_tdata (abfd
)->verref
;
1399 Elf_Internal_Vernaux
*a
;
1401 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
1403 if (a
->vna_other
== vernum
)
1405 version_string
= a
->vna_nodename
;
1412 if ((((elf_symbol_type
*) symbol
)->version
& VERSYM_HIDDEN
) == 0)
1413 fprintf (file
, " %-11s", version_string
);
1418 fprintf (file
, " (%s)", version_string
);
1419 for (i
= 10 - strlen (version_string
); i
> 0; --i
)
1424 /* If the st_other field is not zero, print it. */
1425 st_other
= ((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_other
;
1430 case STV_INTERNAL
: fprintf (file
, " .internal"); break;
1431 case STV_HIDDEN
: fprintf (file
, " .hidden"); break;
1432 case STV_PROTECTED
: fprintf (file
, " .protected"); break;
1434 /* Some other non-defined flags are also present, so print
1436 fprintf (file
, " 0x%02x", (unsigned int) st_other
);
1439 fprintf (file
, " %s", name
);
1445 /* Allocate an ELF string table--force the first byte to be zero. */
1447 struct bfd_strtab_hash
*
1448 _bfd_elf_stringtab_init (void)
1450 struct bfd_strtab_hash
*ret
;
1452 ret
= _bfd_stringtab_init ();
1457 loc
= _bfd_stringtab_add (ret
, "", TRUE
, FALSE
);
1458 BFD_ASSERT (loc
== 0 || loc
== (bfd_size_type
) -1);
1459 if (loc
== (bfd_size_type
) -1)
1461 _bfd_stringtab_free (ret
);
1468 /* ELF .o/exec file reading */
1470 /* Create a new bfd section from an ELF section header. */
1473 bfd_section_from_shdr (bfd
*abfd
, unsigned int shindex
)
1475 Elf_Internal_Shdr
*hdr
= elf_elfsections (abfd
)[shindex
];
1476 Elf_Internal_Ehdr
*ehdr
= elf_elfheader (abfd
);
1477 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
1480 name
= bfd_elf_string_from_elf_section (abfd
,
1481 elf_elfheader (abfd
)->e_shstrndx
,
1486 switch (hdr
->sh_type
)
1489 /* Inactive section. Throw it away. */
1492 case SHT_PROGBITS
: /* Normal section with contents. */
1493 case SHT_NOBITS
: /* .bss section. */
1494 case SHT_HASH
: /* .hash section. */
1495 case SHT_NOTE
: /* .note section. */
1496 case SHT_INIT_ARRAY
: /* .init_array section. */
1497 case SHT_FINI_ARRAY
: /* .fini_array section. */
1498 case SHT_PREINIT_ARRAY
: /* .preinit_array section. */
1499 case SHT_GNU_LIBLIST
: /* .gnu.liblist section. */
1500 case SHT_GNU_HASH
: /* .gnu.hash section. */
1501 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
);
1503 case SHT_DYNAMIC
: /* Dynamic linking information. */
1504 if (! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
))
1506 if (hdr
->sh_link
> elf_numsections (abfd
)
1507 || elf_elfsections (abfd
)[hdr
->sh_link
] == NULL
)
1509 if (elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_STRTAB
)
1511 Elf_Internal_Shdr
*dynsymhdr
;
1513 /* The shared libraries distributed with hpux11 have a bogus
1514 sh_link field for the ".dynamic" section. Find the
1515 string table for the ".dynsym" section instead. */
1516 if (elf_dynsymtab (abfd
) != 0)
1518 dynsymhdr
= elf_elfsections (abfd
)[elf_dynsymtab (abfd
)];
1519 hdr
->sh_link
= dynsymhdr
->sh_link
;
1523 unsigned int i
, num_sec
;
1525 num_sec
= elf_numsections (abfd
);
1526 for (i
= 1; i
< num_sec
; i
++)
1528 dynsymhdr
= elf_elfsections (abfd
)[i
];
1529 if (dynsymhdr
->sh_type
== SHT_DYNSYM
)
1531 hdr
->sh_link
= dynsymhdr
->sh_link
;
1539 case SHT_SYMTAB
: /* A symbol table */
1540 if (elf_onesymtab (abfd
) == shindex
)
1543 if (hdr
->sh_entsize
!= bed
->s
->sizeof_sym
)
1545 BFD_ASSERT (elf_onesymtab (abfd
) == 0);
1546 elf_onesymtab (abfd
) = shindex
;
1547 elf_tdata (abfd
)->symtab_hdr
= *hdr
;
1548 elf_elfsections (abfd
)[shindex
] = hdr
= &elf_tdata (abfd
)->symtab_hdr
;
1549 abfd
->flags
|= HAS_SYMS
;
1551 /* Sometimes a shared object will map in the symbol table. If
1552 SHF_ALLOC is set, and this is a shared object, then we also
1553 treat this section as a BFD section. We can not base the
1554 decision purely on SHF_ALLOC, because that flag is sometimes
1555 set in a relocatable object file, which would confuse the
1557 if ((hdr
->sh_flags
& SHF_ALLOC
) != 0
1558 && (abfd
->flags
& DYNAMIC
) != 0
1559 && ! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
,
1563 /* Go looking for SHT_SYMTAB_SHNDX too, since if there is one we
1564 can't read symbols without that section loaded as well. It
1565 is most likely specified by the next section header. */
1566 if (elf_elfsections (abfd
)[elf_symtab_shndx (abfd
)]->sh_link
!= shindex
)
1568 unsigned int i
, num_sec
;
1570 num_sec
= elf_numsections (abfd
);
1571 for (i
= shindex
+ 1; i
< num_sec
; i
++)
1573 Elf_Internal_Shdr
*hdr2
= elf_elfsections (abfd
)[i
];
1574 if (hdr2
->sh_type
== SHT_SYMTAB_SHNDX
1575 && hdr2
->sh_link
== shindex
)
1579 for (i
= 1; i
< shindex
; i
++)
1581 Elf_Internal_Shdr
*hdr2
= elf_elfsections (abfd
)[i
];
1582 if (hdr2
->sh_type
== SHT_SYMTAB_SHNDX
1583 && hdr2
->sh_link
== shindex
)
1587 return bfd_section_from_shdr (abfd
, i
);
1591 case SHT_DYNSYM
: /* A dynamic symbol table */
1592 if (elf_dynsymtab (abfd
) == shindex
)
1595 if (hdr
->sh_entsize
!= bed
->s
->sizeof_sym
)
1597 BFD_ASSERT (elf_dynsymtab (abfd
) == 0);
1598 elf_dynsymtab (abfd
) = shindex
;
1599 elf_tdata (abfd
)->dynsymtab_hdr
= *hdr
;
1600 elf_elfsections (abfd
)[shindex
] = hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
1601 abfd
->flags
|= HAS_SYMS
;
1603 /* Besides being a symbol table, we also treat this as a regular
1604 section, so that objcopy can handle it. */
1605 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
);
1607 case SHT_SYMTAB_SHNDX
: /* Symbol section indices when >64k sections */
1608 if (elf_symtab_shndx (abfd
) == shindex
)
1611 BFD_ASSERT (elf_symtab_shndx (abfd
) == 0);
1612 elf_symtab_shndx (abfd
) = shindex
;
1613 elf_tdata (abfd
)->symtab_shndx_hdr
= *hdr
;
1614 elf_elfsections (abfd
)[shindex
] = &elf_tdata (abfd
)->symtab_shndx_hdr
;
1617 case SHT_STRTAB
: /* A string table */
1618 if (hdr
->bfd_section
!= NULL
)
1620 if (ehdr
->e_shstrndx
== shindex
)
1622 elf_tdata (abfd
)->shstrtab_hdr
= *hdr
;
1623 elf_elfsections (abfd
)[shindex
] = &elf_tdata (abfd
)->shstrtab_hdr
;
1626 if (elf_elfsections (abfd
)[elf_onesymtab (abfd
)]->sh_link
== shindex
)
1629 elf_tdata (abfd
)->strtab_hdr
= *hdr
;
1630 elf_elfsections (abfd
)[shindex
] = &elf_tdata (abfd
)->strtab_hdr
;
1633 if (elf_elfsections (abfd
)[elf_dynsymtab (abfd
)]->sh_link
== shindex
)
1636 elf_tdata (abfd
)->dynstrtab_hdr
= *hdr
;
1637 hdr
= &elf_tdata (abfd
)->dynstrtab_hdr
;
1638 elf_elfsections (abfd
)[shindex
] = hdr
;
1639 /* We also treat this as a regular section, so that objcopy
1641 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
,
1645 /* If the string table isn't one of the above, then treat it as a
1646 regular section. We need to scan all the headers to be sure,
1647 just in case this strtab section appeared before the above. */
1648 if (elf_onesymtab (abfd
) == 0 || elf_dynsymtab (abfd
) == 0)
1650 unsigned int i
, num_sec
;
1652 num_sec
= elf_numsections (abfd
);
1653 for (i
= 1; i
< num_sec
; i
++)
1655 Elf_Internal_Shdr
*hdr2
= elf_elfsections (abfd
)[i
];
1656 if (hdr2
->sh_link
== shindex
)
1658 /* Prevent endless recursion on broken objects. */
1661 if (! bfd_section_from_shdr (abfd
, i
))
1663 if (elf_onesymtab (abfd
) == i
)
1665 if (elf_dynsymtab (abfd
) == i
)
1666 goto dynsymtab_strtab
;
1670 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
);
1674 /* *These* do a lot of work -- but build no sections! */
1676 asection
*target_sect
;
1677 Elf_Internal_Shdr
*hdr2
;
1678 unsigned int num_sec
= elf_numsections (abfd
);
1681 != (bfd_size_type
) (hdr
->sh_type
== SHT_REL
1682 ? bed
->s
->sizeof_rel
: bed
->s
->sizeof_rela
))
1685 /* Check for a bogus link to avoid crashing. */
1686 if ((hdr
->sh_link
>= SHN_LORESERVE
&& hdr
->sh_link
<= SHN_HIRESERVE
)
1687 || hdr
->sh_link
>= num_sec
)
1689 ((*_bfd_error_handler
)
1690 (_("%B: invalid link %lu for reloc section %s (index %u)"),
1691 abfd
, hdr
->sh_link
, name
, shindex
));
1692 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
,
1696 /* For some incomprehensible reason Oracle distributes
1697 libraries for Solaris in which some of the objects have
1698 bogus sh_link fields. It would be nice if we could just
1699 reject them, but, unfortunately, some people need to use
1700 them. We scan through the section headers; if we find only
1701 one suitable symbol table, we clobber the sh_link to point
1702 to it. I hope this doesn't break anything. */
1703 if (elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_SYMTAB
1704 && elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_DYNSYM
)
1710 for (scan
= 1; scan
< num_sec
; scan
++)
1712 if (elf_elfsections (abfd
)[scan
]->sh_type
== SHT_SYMTAB
1713 || elf_elfsections (abfd
)[scan
]->sh_type
== SHT_DYNSYM
)
1724 hdr
->sh_link
= found
;
1727 /* Get the symbol table. */
1728 if ((elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
== SHT_SYMTAB
1729 || elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
== SHT_DYNSYM
)
1730 && ! bfd_section_from_shdr (abfd
, hdr
->sh_link
))
1733 /* If this reloc section does not use the main symbol table we
1734 don't treat it as a reloc section. BFD can't adequately
1735 represent such a section, so at least for now, we don't
1736 try. We just present it as a normal section. We also
1737 can't use it as a reloc section if it points to the null
1738 section, an invalid section, or another reloc section. */
1739 if (hdr
->sh_link
!= elf_onesymtab (abfd
)
1740 || hdr
->sh_info
== SHN_UNDEF
1741 || (hdr
->sh_info
>= SHN_LORESERVE
&& hdr
->sh_info
<= SHN_HIRESERVE
)
1742 || hdr
->sh_info
>= num_sec
1743 || elf_elfsections (abfd
)[hdr
->sh_info
]->sh_type
== SHT_REL
1744 || elf_elfsections (abfd
)[hdr
->sh_info
]->sh_type
== SHT_RELA
)
1745 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
,
1748 if (! bfd_section_from_shdr (abfd
, hdr
->sh_info
))
1750 target_sect
= bfd_section_from_elf_index (abfd
, hdr
->sh_info
);
1751 if (target_sect
== NULL
)
1754 if ((target_sect
->flags
& SEC_RELOC
) == 0
1755 || target_sect
->reloc_count
== 0)
1756 hdr2
= &elf_section_data (target_sect
)->rel_hdr
;
1760 BFD_ASSERT (elf_section_data (target_sect
)->rel_hdr2
== NULL
);
1761 amt
= sizeof (*hdr2
);
1762 hdr2
= bfd_alloc (abfd
, amt
);
1763 elf_section_data (target_sect
)->rel_hdr2
= hdr2
;
1766 elf_elfsections (abfd
)[shindex
] = hdr2
;
1767 target_sect
->reloc_count
+= NUM_SHDR_ENTRIES (hdr
);
1768 target_sect
->flags
|= SEC_RELOC
;
1769 target_sect
->relocation
= NULL
;
1770 target_sect
->rel_filepos
= hdr
->sh_offset
;
1771 /* In the section to which the relocations apply, mark whether
1772 its relocations are of the REL or RELA variety. */
1773 if (hdr
->sh_size
!= 0)
1774 target_sect
->use_rela_p
= hdr
->sh_type
== SHT_RELA
;
1775 abfd
->flags
|= HAS_RELOC
;
1779 case SHT_GNU_verdef
:
1780 elf_dynverdef (abfd
) = shindex
;
1781 elf_tdata (abfd
)->dynverdef_hdr
= *hdr
;
1782 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
);
1784 case SHT_GNU_versym
:
1785 if (hdr
->sh_entsize
!= sizeof (Elf_External_Versym
))
1787 elf_dynversym (abfd
) = shindex
;
1788 elf_tdata (abfd
)->dynversym_hdr
= *hdr
;
1789 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
);
1791 case SHT_GNU_verneed
:
1792 elf_dynverref (abfd
) = shindex
;
1793 elf_tdata (abfd
)->dynverref_hdr
= *hdr
;
1794 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
);
1800 /* We need a BFD section for objcopy and relocatable linking,
1801 and it's handy to have the signature available as the section
1803 if (! IS_VALID_GROUP_SECTION_HEADER (hdr
))
1805 name
= group_signature (abfd
, hdr
);
1808 if (!_bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
))
1810 if (hdr
->contents
!= NULL
)
1812 Elf_Internal_Group
*idx
= (Elf_Internal_Group
*) hdr
->contents
;
1813 unsigned int n_elt
= hdr
->sh_size
/ GRP_ENTRY_SIZE
;
1816 if (idx
->flags
& GRP_COMDAT
)
1817 hdr
->bfd_section
->flags
1818 |= SEC_LINK_ONCE
| SEC_LINK_DUPLICATES_DISCARD
;
1820 /* We try to keep the same section order as it comes in. */
1822 while (--n_elt
!= 0)
1826 if (idx
->shdr
!= NULL
1827 && (s
= idx
->shdr
->bfd_section
) != NULL
1828 && elf_next_in_group (s
) != NULL
)
1830 elf_next_in_group (hdr
->bfd_section
) = s
;
1838 /* Possibly an attributes section. */
1839 if (hdr
->sh_type
== SHT_GNU_ATTRIBUTES
1840 || hdr
->sh_type
== bed
->obj_attrs_section_type
)
1842 if (! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
))
1844 _bfd_elf_parse_attributes (abfd
, hdr
);
1848 /* Check for any processor-specific section types. */
1849 if (bed
->elf_backend_section_from_shdr (abfd
, hdr
, name
, shindex
))
1852 if (hdr
->sh_type
>= SHT_LOUSER
&& hdr
->sh_type
<= SHT_HIUSER
)
1854 if ((hdr
->sh_flags
& SHF_ALLOC
) != 0)
1855 /* FIXME: How to properly handle allocated section reserved
1856 for applications? */
1857 (*_bfd_error_handler
)
1858 (_("%B: don't know how to handle allocated, application "
1859 "specific section `%s' [0x%8x]"),
1860 abfd
, name
, hdr
->sh_type
);
1862 /* Allow sections reserved for applications. */
1863 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
,
1866 else if (hdr
->sh_type
>= SHT_LOPROC
1867 && hdr
->sh_type
<= SHT_HIPROC
)
1868 /* FIXME: We should handle this section. */
1869 (*_bfd_error_handler
)
1870 (_("%B: don't know how to handle processor specific section "
1872 abfd
, name
, hdr
->sh_type
);
1873 else if (hdr
->sh_type
>= SHT_LOOS
&& hdr
->sh_type
<= SHT_HIOS
)
1875 /* Unrecognised OS-specific sections. */
1876 if ((hdr
->sh_flags
& SHF_OS_NONCONFORMING
) != 0)
1877 /* SHF_OS_NONCONFORMING indicates that special knowledge is
1878 required to correctly process the section and the file should
1879 be rejected with an error message. */
1880 (*_bfd_error_handler
)
1881 (_("%B: don't know how to handle OS specific section "
1883 abfd
, name
, hdr
->sh_type
);
1885 /* Otherwise it should be processed. */
1886 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
);
1889 /* FIXME: We should handle this section. */
1890 (*_bfd_error_handler
)
1891 (_("%B: don't know how to handle section `%s' [0x%8x]"),
1892 abfd
, name
, hdr
->sh_type
);
1900 /* Return the section for the local symbol specified by ABFD, R_SYMNDX.
1901 Return SEC for sections that have no elf section, and NULL on error. */
1904 bfd_section_from_r_symndx (bfd
*abfd
,
1905 struct sym_sec_cache
*cache
,
1907 unsigned long r_symndx
)
1909 unsigned int ent
= r_symndx
% LOCAL_SYM_CACHE_SIZE
;
1912 if (cache
->abfd
!= abfd
|| cache
->indx
[ent
] != r_symndx
)
1914 Elf_Internal_Shdr
*symtab_hdr
;
1915 unsigned char esym
[sizeof (Elf64_External_Sym
)];
1916 Elf_External_Sym_Shndx eshndx
;
1917 Elf_Internal_Sym isym
;
1919 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
1920 if (bfd_elf_get_elf_syms (abfd
, symtab_hdr
, 1, r_symndx
,
1921 &isym
, esym
, &eshndx
) == NULL
)
1924 if (cache
->abfd
!= abfd
)
1926 memset (cache
->indx
, -1, sizeof (cache
->indx
));
1929 cache
->indx
[ent
] = r_symndx
;
1930 cache
->shndx
[ent
] = isym
.st_shndx
;
1933 s
= bfd_section_from_elf_index (abfd
, cache
->shndx
[ent
]);
1940 /* Given an ELF section number, retrieve the corresponding BFD
1944 bfd_section_from_elf_index (bfd
*abfd
, unsigned int index
)
1946 if (index
>= elf_numsections (abfd
))
1948 return elf_elfsections (abfd
)[index
]->bfd_section
;
1951 static const struct bfd_elf_special_section special_sections_b
[] =
1953 { STRING_COMMA_LEN (".bss"), -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
},
1954 { NULL
, 0, 0, 0, 0 }
1957 static const struct bfd_elf_special_section special_sections_c
[] =
1959 { STRING_COMMA_LEN (".comment"), 0, SHT_PROGBITS
, 0 },
1960 { NULL
, 0, 0, 0, 0 }
1963 static const struct bfd_elf_special_section special_sections_d
[] =
1965 { STRING_COMMA_LEN (".data"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
},
1966 { STRING_COMMA_LEN (".data1"), 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
},
1967 { STRING_COMMA_LEN (".debug"), 0, SHT_PROGBITS
, 0 },
1968 { STRING_COMMA_LEN (".debug_line"), 0, SHT_PROGBITS
, 0 },
1969 { STRING_COMMA_LEN (".debug_info"), 0, SHT_PROGBITS
, 0 },
1970 { STRING_COMMA_LEN (".debug_abbrev"), 0, SHT_PROGBITS
, 0 },
1971 { STRING_COMMA_LEN (".debug_aranges"), 0, SHT_PROGBITS
, 0 },
1972 { STRING_COMMA_LEN (".dynamic"), 0, SHT_DYNAMIC
, SHF_ALLOC
},
1973 { STRING_COMMA_LEN (".dynstr"), 0, SHT_STRTAB
, SHF_ALLOC
},
1974 { STRING_COMMA_LEN (".dynsym"), 0, SHT_DYNSYM
, SHF_ALLOC
},
1975 { NULL
, 0, 0, 0, 0 }
1978 static const struct bfd_elf_special_section special_sections_f
[] =
1980 { STRING_COMMA_LEN (".fini"), 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
},
1981 { STRING_COMMA_LEN (".fini_array"), 0, SHT_FINI_ARRAY
, SHF_ALLOC
+ SHF_WRITE
},
1982 { NULL
, 0, 0, 0, 0 }
1985 static const struct bfd_elf_special_section special_sections_g
[] =
1987 { STRING_COMMA_LEN (".gnu.linkonce.b"), -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
},
1988 { STRING_COMMA_LEN (".got"), 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
},
1989 { STRING_COMMA_LEN (".gnu.version"), 0, SHT_GNU_versym
, 0 },
1990 { STRING_COMMA_LEN (".gnu.version_d"), 0, SHT_GNU_verdef
, 0 },
1991 { STRING_COMMA_LEN (".gnu.version_r"), 0, SHT_GNU_verneed
, 0 },
1992 { STRING_COMMA_LEN (".gnu.liblist"), 0, SHT_GNU_LIBLIST
, SHF_ALLOC
},
1993 { STRING_COMMA_LEN (".gnu.conflict"), 0, SHT_RELA
, SHF_ALLOC
},
1994 { STRING_COMMA_LEN (".gnu.hash"), 0, SHT_GNU_HASH
, SHF_ALLOC
},
1995 { NULL
, 0, 0, 0, 0 }
1998 static const struct bfd_elf_special_section special_sections_h
[] =
2000 { STRING_COMMA_LEN (".hash"), 0, SHT_HASH
, SHF_ALLOC
},
2001 { NULL
, 0, 0, 0, 0 }
2004 static const struct bfd_elf_special_section special_sections_i
[] =
2006 { STRING_COMMA_LEN (".init"), 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
},
2007 { STRING_COMMA_LEN (".init_array"), 0, SHT_INIT_ARRAY
, SHF_ALLOC
+ SHF_WRITE
},
2008 { STRING_COMMA_LEN (".interp"), 0, SHT_PROGBITS
, 0 },
2009 { NULL
, 0, 0, 0, 0 }
2012 static const struct bfd_elf_special_section special_sections_l
[] =
2014 { STRING_COMMA_LEN (".line"), 0, SHT_PROGBITS
, 0 },
2015 { NULL
, 0, 0, 0, 0 }
2018 static const struct bfd_elf_special_section special_sections_n
[] =
2020 { STRING_COMMA_LEN (".note.GNU-stack"), 0, SHT_PROGBITS
, 0 },
2021 { STRING_COMMA_LEN (".note"), -1, SHT_NOTE
, 0 },
2022 { NULL
, 0, 0, 0, 0 }
2025 static const struct bfd_elf_special_section special_sections_p
[] =
2027 { STRING_COMMA_LEN (".preinit_array"), 0, SHT_PREINIT_ARRAY
, SHF_ALLOC
+ SHF_WRITE
},
2028 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
},
2029 { NULL
, 0, 0, 0, 0 }
2032 static const struct bfd_elf_special_section special_sections_r
[] =
2034 { STRING_COMMA_LEN (".rodata"), -2, SHT_PROGBITS
, SHF_ALLOC
},
2035 { STRING_COMMA_LEN (".rodata1"), 0, SHT_PROGBITS
, SHF_ALLOC
},
2036 { STRING_COMMA_LEN (".rela"), -1, SHT_RELA
, 0 },
2037 { STRING_COMMA_LEN (".rel"), -1, SHT_REL
, 0 },
2038 { NULL
, 0, 0, 0, 0 }
2041 static const struct bfd_elf_special_section special_sections_s
[] =
2043 { STRING_COMMA_LEN (".shstrtab"), 0, SHT_STRTAB
, 0 },
2044 { STRING_COMMA_LEN (".strtab"), 0, SHT_STRTAB
, 0 },
2045 { STRING_COMMA_LEN (".symtab"), 0, SHT_SYMTAB
, 0 },
2046 /* See struct bfd_elf_special_section declaration for the semantics of
2047 this special case where .prefix_length != strlen (.prefix). */
2048 { ".stabstr", 5, 3, SHT_STRTAB
, 0 },
2049 { NULL
, 0, 0, 0, 0 }
2052 static const struct bfd_elf_special_section special_sections_t
[] =
2054 { STRING_COMMA_LEN (".text"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
},
2055 { STRING_COMMA_LEN (".tbss"), -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_TLS
},
2056 { STRING_COMMA_LEN (".tdata"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_TLS
},
2057 { NULL
, 0, 0, 0, 0 }
2060 static const struct bfd_elf_special_section
*special_sections
[] =
2062 special_sections_b
, /* 'b' */
2063 special_sections_c
, /* 'b' */
2064 special_sections_d
, /* 'd' */
2066 special_sections_f
, /* 'f' */
2067 special_sections_g
, /* 'g' */
2068 special_sections_h
, /* 'h' */
2069 special_sections_i
, /* 'i' */
2072 special_sections_l
, /* 'l' */
2074 special_sections_n
, /* 'n' */
2076 special_sections_p
, /* 'p' */
2078 special_sections_r
, /* 'r' */
2079 special_sections_s
, /* 's' */
2080 special_sections_t
, /* 't' */
2083 const struct bfd_elf_special_section
*
2084 _bfd_elf_get_special_section (const char *name
,
2085 const struct bfd_elf_special_section
*spec
,
2091 len
= strlen (name
);
2093 for (i
= 0; spec
[i
].prefix
!= NULL
; i
++)
2096 int prefix_len
= spec
[i
].prefix_length
;
2098 if (len
< prefix_len
)
2100 if (memcmp (name
, spec
[i
].prefix
, prefix_len
) != 0)
2103 suffix_len
= spec
[i
].suffix_length
;
2104 if (suffix_len
<= 0)
2106 if (name
[prefix_len
] != 0)
2108 if (suffix_len
== 0)
2110 if (name
[prefix_len
] != '.'
2111 && (suffix_len
== -2
2112 || (rela
&& spec
[i
].type
== SHT_REL
)))
2118 if (len
< prefix_len
+ suffix_len
)
2120 if (memcmp (name
+ len
- suffix_len
,
2121 spec
[i
].prefix
+ prefix_len
,
2131 const struct bfd_elf_special_section
*
2132 _bfd_elf_get_sec_type_attr (bfd
*abfd
, asection
*sec
)
2135 const struct bfd_elf_special_section
*spec
;
2136 const struct elf_backend_data
*bed
;
2138 /* See if this is one of the special sections. */
2139 if (sec
->name
== NULL
)
2142 bed
= get_elf_backend_data (abfd
);
2143 spec
= bed
->special_sections
;
2146 spec
= _bfd_elf_get_special_section (sec
->name
,
2147 bed
->special_sections
,
2153 if (sec
->name
[0] != '.')
2156 i
= sec
->name
[1] - 'b';
2157 if (i
< 0 || i
> 't' - 'b')
2160 spec
= special_sections
[i
];
2165 return _bfd_elf_get_special_section (sec
->name
, spec
, sec
->use_rela_p
);
2169 _bfd_elf_new_section_hook (bfd
*abfd
, asection
*sec
)
2171 struct bfd_elf_section_data
*sdata
;
2172 const struct elf_backend_data
*bed
;
2173 const struct bfd_elf_special_section
*ssect
;
2175 sdata
= (struct bfd_elf_section_data
*) sec
->used_by_bfd
;
2178 sdata
= bfd_zalloc (abfd
, sizeof (*sdata
));
2181 sec
->used_by_bfd
= sdata
;
2184 /* Indicate whether or not this section should use RELA relocations. */
2185 bed
= get_elf_backend_data (abfd
);
2186 sec
->use_rela_p
= bed
->default_use_rela_p
;
2188 /* When we read a file, we don't need to set ELF section type and
2189 flags. They will be overridden in _bfd_elf_make_section_from_shdr
2190 anyway. We will set ELF section type and flags for all linker
2191 created sections. If user specifies BFD section flags, we will
2192 set ELF section type and flags based on BFD section flags in
2193 elf_fake_sections. */
2194 if ((!sec
->flags
&& abfd
->direction
!= read_direction
)
2195 || (sec
->flags
& SEC_LINKER_CREATED
) != 0)
2197 ssect
= (*bed
->get_sec_type_attr
) (abfd
, sec
);
2200 elf_section_type (sec
) = ssect
->type
;
2201 elf_section_flags (sec
) = ssect
->attr
;
2205 return _bfd_generic_new_section_hook (abfd
, sec
);
2208 /* Create a new bfd section from an ELF program header.
2210 Since program segments have no names, we generate a synthetic name
2211 of the form segment<NUM>, where NUM is generally the index in the
2212 program header table. For segments that are split (see below) we
2213 generate the names segment<NUM>a and segment<NUM>b.
2215 Note that some program segments may have a file size that is different than
2216 (less than) the memory size. All this means is that at execution the
2217 system must allocate the amount of memory specified by the memory size,
2218 but only initialize it with the first "file size" bytes read from the
2219 file. This would occur for example, with program segments consisting
2220 of combined data+bss.
2222 To handle the above situation, this routine generates TWO bfd sections
2223 for the single program segment. The first has the length specified by
2224 the file size of the segment, and the second has the length specified
2225 by the difference between the two sizes. In effect, the segment is split
2226 into its initialized and uninitialized parts.
2231 _bfd_elf_make_section_from_phdr (bfd
*abfd
,
2232 Elf_Internal_Phdr
*hdr
,
2234 const char *typename
)
2242 split
= ((hdr
->p_memsz
> 0)
2243 && (hdr
->p_filesz
> 0)
2244 && (hdr
->p_memsz
> hdr
->p_filesz
));
2246 if (hdr
->p_filesz
> 0)
2248 sprintf (namebuf
, "%s%d%s", typename
, index
, split
? "a" : "");
2249 len
= strlen (namebuf
) + 1;
2250 name
= bfd_alloc (abfd
, len
);
2253 memcpy (name
, namebuf
, len
);
2254 newsect
= bfd_make_section (abfd
, name
);
2255 if (newsect
== NULL
)
2257 newsect
->vma
= hdr
->p_vaddr
;
2258 newsect
->lma
= hdr
->p_paddr
;
2259 newsect
->size
= hdr
->p_filesz
;
2260 newsect
->filepos
= hdr
->p_offset
;
2261 newsect
->flags
|= SEC_HAS_CONTENTS
;
2262 newsect
->alignment_power
= bfd_log2 (hdr
->p_align
);
2263 if (hdr
->p_type
== PT_LOAD
)
2265 newsect
->flags
|= SEC_ALLOC
;
2266 newsect
->flags
|= SEC_LOAD
;
2267 if (hdr
->p_flags
& PF_X
)
2269 /* FIXME: all we known is that it has execute PERMISSION,
2271 newsect
->flags
|= SEC_CODE
;
2274 if (!(hdr
->p_flags
& PF_W
))
2276 newsect
->flags
|= SEC_READONLY
;
2280 if (hdr
->p_memsz
> hdr
->p_filesz
)
2284 sprintf (namebuf
, "%s%d%s", typename
, index
, split
? "b" : "");
2285 len
= strlen (namebuf
) + 1;
2286 name
= bfd_alloc (abfd
, len
);
2289 memcpy (name
, namebuf
, len
);
2290 newsect
= bfd_make_section (abfd
, name
);
2291 if (newsect
== NULL
)
2293 newsect
->vma
= hdr
->p_vaddr
+ hdr
->p_filesz
;
2294 newsect
->lma
= hdr
->p_paddr
+ hdr
->p_filesz
;
2295 newsect
->size
= hdr
->p_memsz
- hdr
->p_filesz
;
2296 newsect
->filepos
= hdr
->p_offset
+ hdr
->p_filesz
;
2297 align
= newsect
->vma
& -newsect
->vma
;
2298 if (align
== 0 || align
> hdr
->p_align
)
2299 align
= hdr
->p_align
;
2300 newsect
->alignment_power
= bfd_log2 (align
);
2301 if (hdr
->p_type
== PT_LOAD
)
2303 /* Hack for gdb. Segments that have not been modified do
2304 not have their contents written to a core file, on the
2305 assumption that a debugger can find the contents in the
2306 executable. We flag this case by setting the fake
2307 section size to zero. Note that "real" bss sections will
2308 always have their contents dumped to the core file. */
2309 if (bfd_get_format (abfd
) == bfd_core
)
2311 newsect
->flags
|= SEC_ALLOC
;
2312 if (hdr
->p_flags
& PF_X
)
2313 newsect
->flags
|= SEC_CODE
;
2315 if (!(hdr
->p_flags
& PF_W
))
2316 newsect
->flags
|= SEC_READONLY
;
2323 bfd_section_from_phdr (bfd
*abfd
, Elf_Internal_Phdr
*hdr
, int index
)
2325 const struct elf_backend_data
*bed
;
2327 switch (hdr
->p_type
)
2330 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "null");
2333 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "load");
2336 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "dynamic");
2339 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "interp");
2342 if (! _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "note"))
2344 if (! elfcore_read_notes (abfd
, hdr
->p_offset
, hdr
->p_filesz
))
2349 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "shlib");
2352 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "phdr");
2354 case PT_GNU_EH_FRAME
:
2355 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
,
2359 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "attr");
2362 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "relro");
2365 /* Check for any processor-specific program segment types. */
2366 bed
= get_elf_backend_data (abfd
);
2367 return bed
->elf_backend_section_from_phdr (abfd
, hdr
, index
, "proc");
2371 /* Initialize REL_HDR, the section-header for new section, containing
2372 relocations against ASECT. If USE_RELA_P is TRUE, we use RELA
2373 relocations; otherwise, we use REL relocations. */
2376 _bfd_elf_init_reloc_shdr (bfd
*abfd
,
2377 Elf_Internal_Shdr
*rel_hdr
,
2379 bfd_boolean use_rela_p
)
2382 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2383 bfd_size_type amt
= sizeof ".rela" + strlen (asect
->name
);
2385 name
= bfd_alloc (abfd
, amt
);
2388 sprintf (name
, "%s%s", use_rela_p
? ".rela" : ".rel", asect
->name
);
2390 (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd
), name
,
2392 if (rel_hdr
->sh_name
== (unsigned int) -1)
2394 rel_hdr
->sh_type
= use_rela_p
? SHT_RELA
: SHT_REL
;
2395 rel_hdr
->sh_entsize
= (use_rela_p
2396 ? bed
->s
->sizeof_rela
2397 : bed
->s
->sizeof_rel
);
2398 rel_hdr
->sh_addralign
= 1 << bed
->s
->log_file_align
;
2399 rel_hdr
->sh_flags
= 0;
2400 rel_hdr
->sh_addr
= 0;
2401 rel_hdr
->sh_size
= 0;
2402 rel_hdr
->sh_offset
= 0;
2407 /* Set up an ELF internal section header for a section. */
2410 elf_fake_sections (bfd
*abfd
, asection
*asect
, void *failedptrarg
)
2412 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2413 bfd_boolean
*failedptr
= failedptrarg
;
2414 Elf_Internal_Shdr
*this_hdr
;
2415 unsigned int sh_type
;
2419 /* We already failed; just get out of the bfd_map_over_sections
2424 this_hdr
= &elf_section_data (asect
)->this_hdr
;
2426 this_hdr
->sh_name
= (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd
),
2427 asect
->name
, FALSE
);
2428 if (this_hdr
->sh_name
== (unsigned int) -1)
2434 /* Don't clear sh_flags. Assembler may set additional bits. */
2436 if ((asect
->flags
& SEC_ALLOC
) != 0
2437 || asect
->user_set_vma
)
2438 this_hdr
->sh_addr
= asect
->vma
;
2440 this_hdr
->sh_addr
= 0;
2442 this_hdr
->sh_offset
= 0;
2443 this_hdr
->sh_size
= asect
->size
;
2444 this_hdr
->sh_link
= 0;
2445 this_hdr
->sh_addralign
= 1 << asect
->alignment_power
;
2446 /* The sh_entsize and sh_info fields may have been set already by
2447 copy_private_section_data. */
2449 this_hdr
->bfd_section
= asect
;
2450 this_hdr
->contents
= NULL
;
2452 /* If the section type is unspecified, we set it based on
2454 if (this_hdr
->sh_type
== SHT_NULL
)
2456 if ((asect
->flags
& SEC_GROUP
) != 0)
2457 this_hdr
->sh_type
= SHT_GROUP
;
2458 else if ((asect
->flags
& SEC_ALLOC
) != 0
2459 && (((asect
->flags
& (SEC_LOAD
| SEC_HAS_CONTENTS
)) == 0)
2460 || (asect
->flags
& SEC_NEVER_LOAD
) != 0))
2461 this_hdr
->sh_type
= SHT_NOBITS
;
2463 this_hdr
->sh_type
= SHT_PROGBITS
;
2466 switch (this_hdr
->sh_type
)
2472 case SHT_INIT_ARRAY
:
2473 case SHT_FINI_ARRAY
:
2474 case SHT_PREINIT_ARRAY
:
2481 this_hdr
->sh_entsize
= bed
->s
->sizeof_hash_entry
;
2485 this_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
2489 this_hdr
->sh_entsize
= bed
->s
->sizeof_dyn
;
2493 if (get_elf_backend_data (abfd
)->may_use_rela_p
)
2494 this_hdr
->sh_entsize
= bed
->s
->sizeof_rela
;
2498 if (get_elf_backend_data (abfd
)->may_use_rel_p
)
2499 this_hdr
->sh_entsize
= bed
->s
->sizeof_rel
;
2502 case SHT_GNU_versym
:
2503 this_hdr
->sh_entsize
= sizeof (Elf_External_Versym
);
2506 case SHT_GNU_verdef
:
2507 this_hdr
->sh_entsize
= 0;
2508 /* objcopy or strip will copy over sh_info, but may not set
2509 cverdefs. The linker will set cverdefs, but sh_info will be
2511 if (this_hdr
->sh_info
== 0)
2512 this_hdr
->sh_info
= elf_tdata (abfd
)->cverdefs
;
2514 BFD_ASSERT (elf_tdata (abfd
)->cverdefs
== 0
2515 || this_hdr
->sh_info
== elf_tdata (abfd
)->cverdefs
);
2518 case SHT_GNU_verneed
:
2519 this_hdr
->sh_entsize
= 0;
2520 /* objcopy or strip will copy over sh_info, but may not set
2521 cverrefs. The linker will set cverrefs, but sh_info will be
2523 if (this_hdr
->sh_info
== 0)
2524 this_hdr
->sh_info
= elf_tdata (abfd
)->cverrefs
;
2526 BFD_ASSERT (elf_tdata (abfd
)->cverrefs
== 0
2527 || this_hdr
->sh_info
== elf_tdata (abfd
)->cverrefs
);
2531 this_hdr
->sh_entsize
= GRP_ENTRY_SIZE
;
2535 this_hdr
->sh_entsize
= bed
->s
->arch_size
== 64 ? 0 : 4;
2539 if ((asect
->flags
& SEC_ALLOC
) != 0)
2540 this_hdr
->sh_flags
|= SHF_ALLOC
;
2541 if ((asect
->flags
& SEC_READONLY
) == 0)
2542 this_hdr
->sh_flags
|= SHF_WRITE
;
2543 if ((asect
->flags
& SEC_CODE
) != 0)
2544 this_hdr
->sh_flags
|= SHF_EXECINSTR
;
2545 if ((asect
->flags
& SEC_MERGE
) != 0)
2547 this_hdr
->sh_flags
|= SHF_MERGE
;
2548 this_hdr
->sh_entsize
= asect
->entsize
;
2549 if ((asect
->flags
& SEC_STRINGS
) != 0)
2550 this_hdr
->sh_flags
|= SHF_STRINGS
;
2552 if ((asect
->flags
& SEC_GROUP
) == 0 && elf_group_name (asect
) != NULL
)
2553 this_hdr
->sh_flags
|= SHF_GROUP
;
2554 if ((asect
->flags
& SEC_THREAD_LOCAL
) != 0)
2556 this_hdr
->sh_flags
|= SHF_TLS
;
2557 if (asect
->size
== 0
2558 && (asect
->flags
& SEC_HAS_CONTENTS
) == 0)
2560 struct bfd_link_order
*o
= asect
->map_tail
.link_order
;
2562 this_hdr
->sh_size
= 0;
2565 this_hdr
->sh_size
= o
->offset
+ o
->size
;
2566 if (this_hdr
->sh_size
!= 0)
2567 this_hdr
->sh_type
= SHT_NOBITS
;
2572 /* Check for processor-specific section types. */
2573 sh_type
= this_hdr
->sh_type
;
2574 if (bed
->elf_backend_fake_sections
2575 && !(*bed
->elf_backend_fake_sections
) (abfd
, this_hdr
, asect
))
2578 if (sh_type
== SHT_NOBITS
&& asect
->size
!= 0)
2580 /* Don't change the header type from NOBITS if we are being
2581 called for objcopy --only-keep-debug. */
2582 this_hdr
->sh_type
= sh_type
;
2585 /* If the section has relocs, set up a section header for the
2586 SHT_REL[A] section. If two relocation sections are required for
2587 this section, it is up to the processor-specific back-end to
2588 create the other. */
2589 if ((asect
->flags
& SEC_RELOC
) != 0
2590 && !_bfd_elf_init_reloc_shdr (abfd
,
2591 &elf_section_data (asect
)->rel_hdr
,
2597 /* Fill in the contents of a SHT_GROUP section. */
2600 bfd_elf_set_group_contents (bfd
*abfd
, asection
*sec
, void *failedptrarg
)
2602 bfd_boolean
*failedptr
= failedptrarg
;
2603 unsigned long symindx
;
2604 asection
*elt
, *first
;
2608 /* Ignore linker created group section. See elfNN_ia64_object_p in
2610 if (((sec
->flags
& (SEC_GROUP
| SEC_LINKER_CREATED
)) != SEC_GROUP
)
2615 if (elf_group_id (sec
) != NULL
)
2616 symindx
= elf_group_id (sec
)->udata
.i
;
2620 /* If called from the assembler, swap_out_syms will have set up
2621 elf_section_syms; If called for "ld -r", use target_index. */
2622 if (elf_section_syms (abfd
) != NULL
)
2623 symindx
= elf_section_syms (abfd
)[sec
->index
]->udata
.i
;
2625 symindx
= sec
->target_index
;
2627 elf_section_data (sec
)->this_hdr
.sh_info
= symindx
;
2629 /* The contents won't be allocated for "ld -r" or objcopy. */
2631 if (sec
->contents
== NULL
)
2634 sec
->contents
= bfd_alloc (abfd
, sec
->size
);
2636 /* Arrange for the section to be written out. */
2637 elf_section_data (sec
)->this_hdr
.contents
= sec
->contents
;
2638 if (sec
->contents
== NULL
)
2645 loc
= sec
->contents
+ sec
->size
;
2647 /* Get the pointer to the first section in the group that gas
2648 squirreled away here. objcopy arranges for this to be set to the
2649 start of the input section group. */
2650 first
= elt
= elf_next_in_group (sec
);
2652 /* First element is a flag word. Rest of section is elf section
2653 indices for all the sections of the group. Write them backwards
2654 just to keep the group in the same order as given in .section
2655 directives, not that it matters. */
2664 s
= s
->output_section
;
2667 idx
= elf_section_data (s
)->this_idx
;
2668 H_PUT_32 (abfd
, idx
, loc
);
2669 elt
= elf_next_in_group (elt
);
2674 if ((loc
-= 4) != sec
->contents
)
2677 H_PUT_32 (abfd
, sec
->flags
& SEC_LINK_ONCE
? GRP_COMDAT
: 0, loc
);
2680 /* Assign all ELF section numbers. The dummy first section is handled here
2681 too. The link/info pointers for the standard section types are filled
2682 in here too, while we're at it. */
2685 assign_section_numbers (bfd
*abfd
, struct bfd_link_info
*link_info
)
2687 struct elf_obj_tdata
*t
= elf_tdata (abfd
);
2689 unsigned int section_number
, secn
;
2690 Elf_Internal_Shdr
**i_shdrp
;
2691 struct bfd_elf_section_data
*d
;
2695 _bfd_elf_strtab_clear_all_refs (elf_shstrtab (abfd
));
2697 /* SHT_GROUP sections are in relocatable files only. */
2698 if (link_info
== NULL
|| link_info
->relocatable
)
2700 /* Put SHT_GROUP sections first. */
2701 for (sec
= abfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
2703 d
= elf_section_data (sec
);
2705 if (d
->this_hdr
.sh_type
== SHT_GROUP
)
2707 if (sec
->flags
& SEC_LINKER_CREATED
)
2709 /* Remove the linker created SHT_GROUP sections. */
2710 bfd_section_list_remove (abfd
, sec
);
2711 abfd
->section_count
--;
2715 if (section_number
== SHN_LORESERVE
)
2716 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2717 d
->this_idx
= section_number
++;
2723 for (sec
= abfd
->sections
; sec
; sec
= sec
->next
)
2725 d
= elf_section_data (sec
);
2727 if (d
->this_hdr
.sh_type
!= SHT_GROUP
)
2729 if (section_number
== SHN_LORESERVE
)
2730 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2731 d
->this_idx
= section_number
++;
2733 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->this_hdr
.sh_name
);
2734 if ((sec
->flags
& SEC_RELOC
) == 0)
2738 if (section_number
== SHN_LORESERVE
)
2739 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2740 d
->rel_idx
= section_number
++;
2741 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->rel_hdr
.sh_name
);
2746 if (section_number
== SHN_LORESERVE
)
2747 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2748 d
->rel_idx2
= section_number
++;
2749 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->rel_hdr2
->sh_name
);
2755 if (section_number
== SHN_LORESERVE
)
2756 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2757 t
->shstrtab_section
= section_number
++;
2758 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->shstrtab_hdr
.sh_name
);
2759 elf_elfheader (abfd
)->e_shstrndx
= t
->shstrtab_section
;
2761 if (bfd_get_symcount (abfd
) > 0)
2763 if (section_number
== SHN_LORESERVE
)
2764 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2765 t
->symtab_section
= section_number
++;
2766 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->symtab_hdr
.sh_name
);
2767 if (section_number
> SHN_LORESERVE
- 2)
2769 if (section_number
== SHN_LORESERVE
)
2770 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2771 t
->symtab_shndx_section
= section_number
++;
2772 t
->symtab_shndx_hdr
.sh_name
2773 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd
),
2774 ".symtab_shndx", FALSE
);
2775 if (t
->symtab_shndx_hdr
.sh_name
== (unsigned int) -1)
2778 if (section_number
== SHN_LORESERVE
)
2779 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2780 t
->strtab_section
= section_number
++;
2781 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->strtab_hdr
.sh_name
);
2784 _bfd_elf_strtab_finalize (elf_shstrtab (abfd
));
2785 t
->shstrtab_hdr
.sh_size
= _bfd_elf_strtab_size (elf_shstrtab (abfd
));
2787 elf_numsections (abfd
) = section_number
;
2788 elf_elfheader (abfd
)->e_shnum
= section_number
;
2789 if (section_number
> SHN_LORESERVE
)
2790 elf_elfheader (abfd
)->e_shnum
-= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2792 /* Set up the list of section header pointers, in agreement with the
2794 i_shdrp
= bfd_zalloc2 (abfd
, section_number
, sizeof (Elf_Internal_Shdr
*));
2795 if (i_shdrp
== NULL
)
2798 i_shdrp
[0] = bfd_zalloc (abfd
, sizeof (Elf_Internal_Shdr
));
2799 if (i_shdrp
[0] == NULL
)
2801 bfd_release (abfd
, i_shdrp
);
2805 elf_elfsections (abfd
) = i_shdrp
;
2807 i_shdrp
[t
->shstrtab_section
] = &t
->shstrtab_hdr
;
2808 if (bfd_get_symcount (abfd
) > 0)
2810 i_shdrp
[t
->symtab_section
] = &t
->symtab_hdr
;
2811 if (elf_numsections (abfd
) > SHN_LORESERVE
)
2813 i_shdrp
[t
->symtab_shndx_section
] = &t
->symtab_shndx_hdr
;
2814 t
->symtab_shndx_hdr
.sh_link
= t
->symtab_section
;
2816 i_shdrp
[t
->strtab_section
] = &t
->strtab_hdr
;
2817 t
->symtab_hdr
.sh_link
= t
->strtab_section
;
2820 for (sec
= abfd
->sections
; sec
; sec
= sec
->next
)
2822 struct bfd_elf_section_data
*d
= elf_section_data (sec
);
2826 i_shdrp
[d
->this_idx
] = &d
->this_hdr
;
2827 if (d
->rel_idx
!= 0)
2828 i_shdrp
[d
->rel_idx
] = &d
->rel_hdr
;
2829 if (d
->rel_idx2
!= 0)
2830 i_shdrp
[d
->rel_idx2
] = d
->rel_hdr2
;
2832 /* Fill in the sh_link and sh_info fields while we're at it. */
2834 /* sh_link of a reloc section is the section index of the symbol
2835 table. sh_info is the section index of the section to which
2836 the relocation entries apply. */
2837 if (d
->rel_idx
!= 0)
2839 d
->rel_hdr
.sh_link
= t
->symtab_section
;
2840 d
->rel_hdr
.sh_info
= d
->this_idx
;
2842 if (d
->rel_idx2
!= 0)
2844 d
->rel_hdr2
->sh_link
= t
->symtab_section
;
2845 d
->rel_hdr2
->sh_info
= d
->this_idx
;
2848 /* We need to set up sh_link for SHF_LINK_ORDER. */
2849 if ((d
->this_hdr
.sh_flags
& SHF_LINK_ORDER
) != 0)
2851 s
= elf_linked_to_section (sec
);
2854 /* elf_linked_to_section points to the input section. */
2855 if (link_info
!= NULL
)
2857 /* Check discarded linkonce section. */
2858 if (elf_discarded_section (s
))
2861 (*_bfd_error_handler
)
2862 (_("%B: sh_link of section `%A' points to discarded section `%A' of `%B'"),
2863 abfd
, d
->this_hdr
.bfd_section
,
2865 /* Point to the kept section if it has the same
2866 size as the discarded one. */
2867 kept
= _bfd_elf_check_kept_section (s
, link_info
);
2870 bfd_set_error (bfd_error_bad_value
);
2876 s
= s
->output_section
;
2877 BFD_ASSERT (s
!= NULL
);
2881 /* Handle objcopy. */
2882 if (s
->output_section
== NULL
)
2884 (*_bfd_error_handler
)
2885 (_("%B: sh_link of section `%A' points to removed section `%A' of `%B'"),
2886 abfd
, d
->this_hdr
.bfd_section
, s
, s
->owner
);
2887 bfd_set_error (bfd_error_bad_value
);
2890 s
= s
->output_section
;
2892 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
2897 The Intel C compiler generates SHT_IA_64_UNWIND with
2898 SHF_LINK_ORDER. But it doesn't set the sh_link or
2899 sh_info fields. Hence we could get the situation
2901 const struct elf_backend_data
*bed
2902 = get_elf_backend_data (abfd
);
2903 if (bed
->link_order_error_handler
)
2904 bed
->link_order_error_handler
2905 (_("%B: warning: sh_link not set for section `%A'"),
2910 switch (d
->this_hdr
.sh_type
)
2914 /* A reloc section which we are treating as a normal BFD
2915 section. sh_link is the section index of the symbol
2916 table. sh_info is the section index of the section to
2917 which the relocation entries apply. We assume that an
2918 allocated reloc section uses the dynamic symbol table.
2919 FIXME: How can we be sure? */
2920 s
= bfd_get_section_by_name (abfd
, ".dynsym");
2922 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
2924 /* We look up the section the relocs apply to by name. */
2926 if (d
->this_hdr
.sh_type
== SHT_REL
)
2930 s
= bfd_get_section_by_name (abfd
, name
);
2932 d
->this_hdr
.sh_info
= elf_section_data (s
)->this_idx
;
2936 /* We assume that a section named .stab*str is a stabs
2937 string section. We look for a section with the same name
2938 but without the trailing ``str'', and set its sh_link
2939 field to point to this section. */
2940 if (CONST_STRNEQ (sec
->name
, ".stab")
2941 && strcmp (sec
->name
+ strlen (sec
->name
) - 3, "str") == 0)
2946 len
= strlen (sec
->name
);
2947 alc
= bfd_malloc (len
- 2);
2950 memcpy (alc
, sec
->name
, len
- 3);
2951 alc
[len
- 3] = '\0';
2952 s
= bfd_get_section_by_name (abfd
, alc
);
2956 elf_section_data (s
)->this_hdr
.sh_link
= d
->this_idx
;
2958 /* This is a .stab section. */
2959 if (elf_section_data (s
)->this_hdr
.sh_entsize
== 0)
2960 elf_section_data (s
)->this_hdr
.sh_entsize
2961 = 4 + 2 * bfd_get_arch_size (abfd
) / 8;
2968 case SHT_GNU_verneed
:
2969 case SHT_GNU_verdef
:
2970 /* sh_link is the section header index of the string table
2971 used for the dynamic entries, or the symbol table, or the
2973 s
= bfd_get_section_by_name (abfd
, ".dynstr");
2975 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
2978 case SHT_GNU_LIBLIST
:
2979 /* sh_link is the section header index of the prelink library
2980 list used for the dynamic entries, or the symbol table, or
2981 the version strings. */
2982 s
= bfd_get_section_by_name (abfd
, (sec
->flags
& SEC_ALLOC
)
2983 ? ".dynstr" : ".gnu.libstr");
2985 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
2990 case SHT_GNU_versym
:
2991 /* sh_link is the section header index of the symbol table
2992 this hash table or version table is for. */
2993 s
= bfd_get_section_by_name (abfd
, ".dynsym");
2995 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
2999 d
->this_hdr
.sh_link
= t
->symtab_section
;
3003 for (secn
= 1; secn
< section_number
; ++secn
)
3004 if (i_shdrp
[secn
] == NULL
)
3005 i_shdrp
[secn
] = i_shdrp
[0];
3007 i_shdrp
[secn
]->sh_name
= _bfd_elf_strtab_offset (elf_shstrtab (abfd
),
3008 i_shdrp
[secn
]->sh_name
);
3012 /* Map symbol from it's internal number to the external number, moving
3013 all local symbols to be at the head of the list. */
3016 sym_is_global (bfd
*abfd
, asymbol
*sym
)
3018 /* If the backend has a special mapping, use it. */
3019 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3020 if (bed
->elf_backend_sym_is_global
)
3021 return (*bed
->elf_backend_sym_is_global
) (abfd
, sym
);
3023 return ((sym
->flags
& (BSF_GLOBAL
| BSF_WEAK
)) != 0
3024 || bfd_is_und_section (bfd_get_section (sym
))
3025 || bfd_is_com_section (bfd_get_section (sym
)));
3028 /* Don't output section symbols for sections that are not going to be
3029 output. Also, don't output section symbols for reloc and other
3030 special sections. */
3033 ignore_section_sym (bfd
*abfd
, asymbol
*sym
)
3035 return ((sym
->flags
& BSF_SECTION_SYM
) != 0
3037 || (sym
->section
->owner
!= abfd
3038 && (sym
->section
->output_section
->owner
!= abfd
3039 || sym
->section
->output_offset
!= 0))));
3043 elf_map_symbols (bfd
*abfd
)
3045 unsigned int symcount
= bfd_get_symcount (abfd
);
3046 asymbol
**syms
= bfd_get_outsymbols (abfd
);
3047 asymbol
**sect_syms
;
3048 unsigned int num_locals
= 0;
3049 unsigned int num_globals
= 0;
3050 unsigned int num_locals2
= 0;
3051 unsigned int num_globals2
= 0;
3058 fprintf (stderr
, "elf_map_symbols\n");
3062 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
3064 if (max_index
< asect
->index
)
3065 max_index
= asect
->index
;
3069 sect_syms
= bfd_zalloc2 (abfd
, max_index
, sizeof (asymbol
*));
3070 if (sect_syms
== NULL
)
3072 elf_section_syms (abfd
) = sect_syms
;
3073 elf_num_section_syms (abfd
) = max_index
;
3075 /* Init sect_syms entries for any section symbols we have already
3076 decided to output. */
3077 for (idx
= 0; idx
< symcount
; idx
++)
3079 asymbol
*sym
= syms
[idx
];
3081 if ((sym
->flags
& BSF_SECTION_SYM
) != 0
3082 && !ignore_section_sym (abfd
, sym
))
3084 asection
*sec
= sym
->section
;
3086 if (sec
->owner
!= abfd
)
3087 sec
= sec
->output_section
;
3089 sect_syms
[sec
->index
] = syms
[idx
];
3093 /* Classify all of the symbols. */
3094 for (idx
= 0; idx
< symcount
; idx
++)
3096 if (ignore_section_sym (abfd
, syms
[idx
]))
3098 if (!sym_is_global (abfd
, syms
[idx
]))
3104 /* We will be adding a section symbol for each normal BFD section. Most
3105 sections will already have a section symbol in outsymbols, but
3106 eg. SHT_GROUP sections will not, and we need the section symbol mapped
3107 at least in that case. */
3108 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
3110 if (sect_syms
[asect
->index
] == NULL
)
3112 if (!sym_is_global (abfd
, asect
->symbol
))
3119 /* Now sort the symbols so the local symbols are first. */
3120 new_syms
= bfd_alloc2 (abfd
, num_locals
+ num_globals
, sizeof (asymbol
*));
3122 if (new_syms
== NULL
)
3125 for (idx
= 0; idx
< symcount
; idx
++)
3127 asymbol
*sym
= syms
[idx
];
3130 if (ignore_section_sym (abfd
, sym
))
3132 if (!sym_is_global (abfd
, sym
))
3135 i
= num_locals
+ num_globals2
++;
3137 sym
->udata
.i
= i
+ 1;
3139 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
3141 if (sect_syms
[asect
->index
] == NULL
)
3143 asymbol
*sym
= asect
->symbol
;
3146 sect_syms
[asect
->index
] = sym
;
3147 if (!sym_is_global (abfd
, sym
))
3150 i
= num_locals
+ num_globals2
++;
3152 sym
->udata
.i
= i
+ 1;
3156 bfd_set_symtab (abfd
, new_syms
, num_locals
+ num_globals
);
3158 elf_num_locals (abfd
) = num_locals
;
3159 elf_num_globals (abfd
) = num_globals
;
3163 /* Align to the maximum file alignment that could be required for any
3164 ELF data structure. */
3166 static inline file_ptr
3167 align_file_position (file_ptr off
, int align
)
3169 return (off
+ align
- 1) & ~(align
- 1);
3172 /* Assign a file position to a section, optionally aligning to the
3173 required section alignment. */
3176 _bfd_elf_assign_file_position_for_section (Elf_Internal_Shdr
*i_shdrp
,
3184 al
= i_shdrp
->sh_addralign
;
3186 offset
= BFD_ALIGN (offset
, al
);
3188 i_shdrp
->sh_offset
= offset
;
3189 if (i_shdrp
->bfd_section
!= NULL
)
3190 i_shdrp
->bfd_section
->filepos
= offset
;
3191 if (i_shdrp
->sh_type
!= SHT_NOBITS
)
3192 offset
+= i_shdrp
->sh_size
;
3196 /* Compute the file positions we are going to put the sections at, and
3197 otherwise prepare to begin writing out the ELF file. If LINK_INFO
3198 is not NULL, this is being called by the ELF backend linker. */
3201 _bfd_elf_compute_section_file_positions (bfd
*abfd
,
3202 struct bfd_link_info
*link_info
)
3204 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3206 struct bfd_strtab_hash
*strtab
= NULL
;
3207 Elf_Internal_Shdr
*shstrtab_hdr
;
3209 if (abfd
->output_has_begun
)
3212 /* Do any elf backend specific processing first. */
3213 if (bed
->elf_backend_begin_write_processing
)
3214 (*bed
->elf_backend_begin_write_processing
) (abfd
, link_info
);
3216 if (! prep_headers (abfd
))
3219 /* Post process the headers if necessary. */
3220 if (bed
->elf_backend_post_process_headers
)
3221 (*bed
->elf_backend_post_process_headers
) (abfd
, link_info
);
3224 bfd_map_over_sections (abfd
, elf_fake_sections
, &failed
);
3228 if (!assign_section_numbers (abfd
, link_info
))
3231 /* The backend linker builds symbol table information itself. */
3232 if (link_info
== NULL
&& bfd_get_symcount (abfd
) > 0)
3234 /* Non-zero if doing a relocatable link. */
3235 int relocatable_p
= ! (abfd
->flags
& (EXEC_P
| DYNAMIC
));
3237 if (! swap_out_syms (abfd
, &strtab
, relocatable_p
))
3241 if (link_info
== NULL
)
3243 bfd_map_over_sections (abfd
, bfd_elf_set_group_contents
, &failed
);
3248 shstrtab_hdr
= &elf_tdata (abfd
)->shstrtab_hdr
;
3249 /* sh_name was set in prep_headers. */
3250 shstrtab_hdr
->sh_type
= SHT_STRTAB
;
3251 shstrtab_hdr
->sh_flags
= 0;
3252 shstrtab_hdr
->sh_addr
= 0;
3253 shstrtab_hdr
->sh_size
= _bfd_elf_strtab_size (elf_shstrtab (abfd
));
3254 shstrtab_hdr
->sh_entsize
= 0;
3255 shstrtab_hdr
->sh_link
= 0;
3256 shstrtab_hdr
->sh_info
= 0;
3257 /* sh_offset is set in assign_file_positions_except_relocs. */
3258 shstrtab_hdr
->sh_addralign
= 1;
3260 if (!assign_file_positions_except_relocs (abfd
, link_info
))
3263 if (link_info
== NULL
&& bfd_get_symcount (abfd
) > 0)
3266 Elf_Internal_Shdr
*hdr
;
3268 off
= elf_tdata (abfd
)->next_file_pos
;
3270 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
3271 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
3273 hdr
= &elf_tdata (abfd
)->symtab_shndx_hdr
;
3274 if (hdr
->sh_size
!= 0)
3275 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
3277 hdr
= &elf_tdata (abfd
)->strtab_hdr
;
3278 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
3280 elf_tdata (abfd
)->next_file_pos
= off
;
3282 /* Now that we know where the .strtab section goes, write it
3284 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
3285 || ! _bfd_stringtab_emit (abfd
, strtab
))
3287 _bfd_stringtab_free (strtab
);
3290 abfd
->output_has_begun
= TRUE
;
3295 /* Make an initial estimate of the size of the program header. If we
3296 get the number wrong here, we'll redo section placement. */
3298 static bfd_size_type
3299 get_program_header_size (bfd
*abfd
, struct bfd_link_info
*info
)
3303 asection
*attr
= NULL
;
3304 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3306 /* Assume we will need exactly two PT_LOAD segments: one for text
3307 and one for data. */
3310 s
= bfd_get_section_by_name (abfd
, ".interp");
3311 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0)
3313 /* If we have a loadable interpreter section, we need a
3314 PT_INTERP segment. In this case, assume we also need a
3315 PT_PHDR segment, although that may not be true for all
3320 if (bfd_get_section_by_name (abfd
, ".dynamic") != NULL
)
3322 /* We need a PT_DYNAMIC segment. */
3325 if (elf_tdata (abfd
)->relro
)
3327 /* We need a PT_GNU_RELRO segment only when there is a
3328 PT_DYNAMIC segment. */
3333 if (elf_tdata (abfd
)->eh_frame_hdr
)
3335 /* We need a PT_GNU_EH_FRAME segment. */
3339 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
3341 if (elf_section_type (s
) == bed
->obj_attrs_section_type
)
3343 BFD_ASSERT (attr
== NULL
);
3346 /* elf_tdata (abfd)->stack_flags is checked for the
3347 PT_GNU_ATTR segment. If there is an attribute
3348 section, we make sure that stack_flags isn't zero so
3349 that the PT_GNU_ATTR segment will be created. */
3350 if (! elf_tdata (abfd
)->stack_flags
)
3352 if (bed
->default_execstack
)
3353 elf_tdata (abfd
)->stack_flags
= PF_R
| PF_W
| PF_X
;
3355 elf_tdata (abfd
)->stack_flags
= PF_R
| PF_W
;
3359 if ((s
->flags
& SEC_LOAD
) != 0
3360 && CONST_STRNEQ (s
->name
, ".note"))
3362 /* We need a PT_NOTE segment. */
3364 /* Try to create just one PT_NOTE segment
3365 for all adjacent loadable .note* sections.
3366 gABI requires that within a PT_NOTE segment
3367 (and also inside of each SHT_NOTE section)
3368 each note is padded to a multiple of 4 size,
3369 so we check whether the sections are correctly
3371 if (s
->alignment_power
== 2)
3372 while (s
->next
!= NULL
3373 && s
->next
->alignment_power
== 2
3374 && (s
->next
->flags
& SEC_LOAD
) != 0
3375 && CONST_STRNEQ (s
->next
->name
, ".note"))
3380 if (elf_tdata (abfd
)->stack_flags
)
3382 /* We need a PT_GNU_ATTR segment. */
3386 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
3388 if (s
->flags
& SEC_THREAD_LOCAL
)
3390 /* We need a PT_TLS segment. */
3396 /* Let the backend count up any program headers it might need. */
3397 if (bed
->elf_backend_additional_program_headers
)
3401 a
= (*bed
->elf_backend_additional_program_headers
) (abfd
, info
);
3407 return segs
* bed
->s
->sizeof_phdr
;
3410 /* Create a mapping from a set of sections to a program segment. */
3412 static struct elf_segment_map
*
3413 make_mapping (bfd
*abfd
,
3414 asection
**sections
,
3419 struct elf_segment_map
*m
;
3424 amt
= sizeof (struct elf_segment_map
);
3425 amt
+= (to
- from
- 1) * sizeof (asection
*);
3426 m
= bfd_zalloc (abfd
, amt
);
3430 m
->p_type
= PT_LOAD
;
3431 for (i
= from
, hdrpp
= sections
+ from
; i
< to
; i
++, hdrpp
++)
3432 m
->sections
[i
- from
] = *hdrpp
;
3433 m
->count
= to
- from
;
3435 if (from
== 0 && phdr
)
3437 /* Include the headers in the first PT_LOAD segment. */
3438 m
->includes_filehdr
= 1;
3439 m
->includes_phdrs
= 1;
3445 /* Create the PT_DYNAMIC segment, which includes DYNSEC. Returns NULL
3448 struct elf_segment_map
*
3449 _bfd_elf_make_dynamic_segment (bfd
*abfd
, asection
*dynsec
)
3451 struct elf_segment_map
*m
;
3453 m
= bfd_zalloc (abfd
, sizeof (struct elf_segment_map
));
3457 m
->p_type
= PT_DYNAMIC
;
3459 m
->sections
[0] = dynsec
;
3464 /* Possibly add or remove segments from the segment map. */
3467 elf_modify_segment_map (bfd
*abfd
,
3468 struct bfd_link_info
*info
,
3469 bfd_boolean remove_empty_load
)
3471 struct elf_segment_map
**m
;
3472 const struct elf_backend_data
*bed
;
3474 /* The placement algorithm assumes that non allocated sections are
3475 not in PT_LOAD segments. We ensure this here by removing such
3476 sections from the segment map. We also remove excluded
3477 sections. Finally, any PT_LOAD segment without sections is
3479 m
= &elf_tdata (abfd
)->segment_map
;
3482 unsigned int i
, new_count
;
3484 for (new_count
= 0, i
= 0; i
< (*m
)->count
; i
++)
3486 if (((*m
)->sections
[i
]->flags
& SEC_EXCLUDE
) == 0
3487 && (((*m
)->sections
[i
]->flags
& SEC_ALLOC
) != 0
3488 || (*m
)->p_type
!= PT_LOAD
))
3490 (*m
)->sections
[new_count
] = (*m
)->sections
[i
];
3494 (*m
)->count
= new_count
;
3496 if (remove_empty_load
&& (*m
)->p_type
== PT_LOAD
&& (*m
)->count
== 0)
3502 bed
= get_elf_backend_data (abfd
);
3503 if (bed
->elf_backend_modify_segment_map
!= NULL
)
3505 if (!(*bed
->elf_backend_modify_segment_map
) (abfd
, info
))
3512 /* Set up a mapping from BFD sections to program segments. */
3515 _bfd_elf_map_sections_to_segments (bfd
*abfd
, struct bfd_link_info
*info
)
3518 struct elf_segment_map
*m
;
3519 asection
**sections
= NULL
;
3520 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3521 bfd_boolean no_user_phdrs
;
3523 no_user_phdrs
= elf_tdata (abfd
)->segment_map
== NULL
;
3524 if (no_user_phdrs
&& bfd_count_sections (abfd
) != 0)
3528 struct elf_segment_map
*mfirst
;
3529 struct elf_segment_map
**pm
;
3532 unsigned int phdr_index
;
3533 bfd_vma maxpagesize
;
3535 bfd_boolean phdr_in_segment
= TRUE
;
3536 bfd_boolean writable
;
3538 asection
*first_tls
= NULL
;
3539 asection
*dynsec
, *eh_frame_hdr
;
3541 asection
*attr
= NULL
;
3543 /* Select the allocated sections, and sort them. */
3545 sections
= bfd_malloc2 (bfd_count_sections (abfd
), sizeof (asection
*));
3546 if (sections
== NULL
)
3550 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
3552 if (elf_section_type (s
) == bed
->obj_attrs_section_type
)
3554 BFD_ASSERT (attr
== NULL
);
3558 if ((s
->flags
& SEC_ALLOC
) != 0)
3564 BFD_ASSERT (i
<= bfd_count_sections (abfd
));
3567 qsort (sections
, (size_t) count
, sizeof (asection
*), elf_sort_sections
);
3569 /* Build the mapping. */
3574 /* If we have a .interp section, then create a PT_PHDR segment for
3575 the program headers and a PT_INTERP segment for the .interp
3577 s
= bfd_get_section_by_name (abfd
, ".interp");
3578 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0)
3580 amt
= sizeof (struct elf_segment_map
);
3581 m
= bfd_zalloc (abfd
, amt
);
3585 m
->p_type
= PT_PHDR
;
3586 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
3587 m
->p_flags
= PF_R
| PF_X
;
3588 m
->p_flags_valid
= 1;
3589 m
->includes_phdrs
= 1;
3594 amt
= sizeof (struct elf_segment_map
);
3595 m
= bfd_zalloc (abfd
, amt
);
3599 m
->p_type
= PT_INTERP
;
3607 /* Look through the sections. We put sections in the same program
3608 segment when the start of the second section can be placed within
3609 a few bytes of the end of the first section. */
3613 maxpagesize
= bed
->maxpagesize
;
3615 dynsec
= bfd_get_section_by_name (abfd
, ".dynamic");
3617 && (dynsec
->flags
& SEC_LOAD
) == 0)
3620 /* Deal with -Ttext or something similar such that the first section
3621 is not adjacent to the program headers. This is an
3622 approximation, since at this point we don't know exactly how many
3623 program headers we will need. */
3626 bfd_size_type phdr_size
= elf_tdata (abfd
)->program_header_size
;
3628 if (phdr_size
== (bfd_size_type
) -1)
3629 phdr_size
= get_program_header_size (abfd
, info
);
3630 if ((abfd
->flags
& D_PAGED
) == 0
3631 || sections
[0]->lma
< phdr_size
3632 || sections
[0]->lma
% maxpagesize
< phdr_size
% maxpagesize
)
3633 phdr_in_segment
= FALSE
;
3636 for (i
= 0, hdrpp
= sections
; i
< count
; i
++, hdrpp
++)
3639 bfd_boolean new_segment
;
3643 /* See if this section and the last one will fit in the same
3646 if (last_hdr
== NULL
)
3648 /* If we don't have a segment yet, then we don't need a new
3649 one (we build the last one after this loop). */
3650 new_segment
= FALSE
;
3652 else if (last_hdr
->lma
- last_hdr
->vma
!= hdr
->lma
- hdr
->vma
)
3654 /* If this section has a different relation between the
3655 virtual address and the load address, then we need a new
3659 else if (BFD_ALIGN (last_hdr
->lma
+ last_size
, maxpagesize
)
3660 < BFD_ALIGN (hdr
->lma
, maxpagesize
))
3662 /* If putting this section in this segment would force us to
3663 skip a page in the segment, then we need a new segment. */
3666 else if ((last_hdr
->flags
& (SEC_LOAD
| SEC_THREAD_LOCAL
)) == 0
3667 && (hdr
->flags
& (SEC_LOAD
| SEC_THREAD_LOCAL
)) != 0)
3669 /* We don't want to put a loadable section after a
3670 nonloadable section in the same segment.
3671 Consider .tbss sections as loadable for this purpose. */
3674 else if ((abfd
->flags
& D_PAGED
) == 0)
3676 /* If the file is not demand paged, which means that we
3677 don't require the sections to be correctly aligned in the
3678 file, then there is no other reason for a new segment. */
3679 new_segment
= FALSE
;
3682 && (hdr
->flags
& SEC_READONLY
) == 0
3683 && (((last_hdr
->lma
+ last_size
- 1)
3684 & ~(maxpagesize
- 1))
3685 != (hdr
->lma
& ~(maxpagesize
- 1))))
3687 /* We don't want to put a writable section in a read only
3688 segment, unless they are on the same page in memory
3689 anyhow. We already know that the last section does not
3690 bring us past the current section on the page, so the
3691 only case in which the new section is not on the same
3692 page as the previous section is when the previous section
3693 ends precisely on a page boundary. */
3698 /* Otherwise, we can use the same segment. */
3699 new_segment
= FALSE
;
3702 /* Allow interested parties a chance to override our decision. */
3703 if (last_hdr
&& info
->callbacks
->override_segment_assignment
)
3704 new_segment
= info
->callbacks
->override_segment_assignment (info
, abfd
, hdr
, last_hdr
, new_segment
);
3708 if ((hdr
->flags
& SEC_READONLY
) == 0)
3711 /* .tbss sections effectively have zero size. */
3712 if ((hdr
->flags
& (SEC_THREAD_LOCAL
| SEC_LOAD
))
3713 != SEC_THREAD_LOCAL
)
3714 last_size
= hdr
->size
;
3720 /* We need a new program segment. We must create a new program
3721 header holding all the sections from phdr_index until hdr. */
3723 m
= make_mapping (abfd
, sections
, phdr_index
, i
, phdr_in_segment
);
3730 if ((hdr
->flags
& SEC_READONLY
) == 0)
3736 /* .tbss sections effectively have zero size. */
3737 if ((hdr
->flags
& (SEC_THREAD_LOCAL
| SEC_LOAD
)) != SEC_THREAD_LOCAL
)
3738 last_size
= hdr
->size
;
3742 phdr_in_segment
= FALSE
;
3745 /* Create a final PT_LOAD program segment. */
3746 if (last_hdr
!= NULL
)
3748 m
= make_mapping (abfd
, sections
, phdr_index
, i
, phdr_in_segment
);
3756 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
3759 m
= _bfd_elf_make_dynamic_segment (abfd
, dynsec
);
3766 /* For each batch of consecutive loadable .note sections,
3767 add a PT_NOTE segment. We don't use bfd_get_section_by_name,
3768 because if we link together nonloadable .note sections and
3769 loadable .note sections, we will generate two .note sections
3770 in the output file. FIXME: Using names for section types is
3772 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
3774 if ((s
->flags
& SEC_LOAD
) != 0
3775 && CONST_STRNEQ (s
->name
, ".note"))
3779 amt
= sizeof (struct elf_segment_map
);
3780 if (s
->alignment_power
== 2)
3781 for (s2
= s
; s2
->next
!= NULL
; s2
= s2
->next
)
3783 if (s2
->next
->alignment_power
== 2
3784 && (s2
->next
->flags
& SEC_LOAD
) != 0
3785 && CONST_STRNEQ (s2
->next
->name
, ".note")
3786 && align_power (s2
->vma
+ s2
->size
, 2)
3792 amt
+= (count
- 1) * sizeof (asection
*);
3793 m
= bfd_zalloc (abfd
, amt
);
3797 m
->p_type
= PT_NOTE
;
3801 m
->sections
[m
->count
- count
--] = s
;
3802 BFD_ASSERT ((s
->flags
& SEC_THREAD_LOCAL
) == 0);
3805 m
->sections
[m
->count
- 1] = s
;
3806 BFD_ASSERT ((s
->flags
& SEC_THREAD_LOCAL
) == 0);
3810 if (s
->flags
& SEC_THREAD_LOCAL
)
3818 /* If there are any SHF_TLS output sections, add PT_TLS segment. */
3823 amt
= sizeof (struct elf_segment_map
);
3824 amt
+= (tls_count
- 1) * sizeof (asection
*);
3825 m
= bfd_zalloc (abfd
, amt
);
3830 m
->count
= tls_count
;
3831 /* Mandated PF_R. */
3833 m
->p_flags_valid
= 1;
3834 for (i
= 0; i
< tls_count
; ++i
)
3836 BFD_ASSERT (first_tls
->flags
& SEC_THREAD_LOCAL
);
3837 m
->sections
[i
] = first_tls
;
3838 first_tls
= first_tls
->next
;
3845 /* If there is a .eh_frame_hdr section, throw in a PT_GNU_EH_FRAME
3847 eh_frame_hdr
= elf_tdata (abfd
)->eh_frame_hdr
;
3848 if (eh_frame_hdr
!= NULL
3849 && (eh_frame_hdr
->output_section
->flags
& SEC_LOAD
) != 0)
3851 amt
= sizeof (struct elf_segment_map
);
3852 m
= bfd_zalloc (abfd
, amt
);
3856 m
->p_type
= PT_GNU_EH_FRAME
;
3858 m
->sections
[0] = eh_frame_hdr
->output_section
;
3864 if (elf_tdata (abfd
)->stack_flags
)
3866 amt
= sizeof (struct elf_segment_map
);
3867 m
= bfd_zalloc (abfd
, amt
);
3871 m
->p_type
= PT_GNU_ATTR
;
3872 m
->p_flags
= elf_tdata (abfd
)->stack_flags
;
3873 m
->p_flags_valid
= 1;
3877 /* Add the attribute section if needed. */
3879 m
->sections
[0] = attr
;
3886 if (dynsec
!= NULL
&& elf_tdata (abfd
)->relro
)
3888 /* We make a PT_GNU_RELRO segment only when there is a
3889 PT_DYNAMIC segment. */
3890 amt
= sizeof (struct elf_segment_map
);
3891 m
= bfd_zalloc (abfd
, amt
);
3895 m
->p_type
= PT_GNU_RELRO
;
3897 m
->p_flags_valid
= 1;
3904 elf_tdata (abfd
)->segment_map
= mfirst
;
3907 if (!elf_modify_segment_map (abfd
, info
, no_user_phdrs
))
3910 for (count
= 0, m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
3912 elf_tdata (abfd
)->program_header_size
= count
* bed
->s
->sizeof_phdr
;
3917 if (sections
!= NULL
)
3922 /* Sort sections by address. */
3925 elf_sort_sections (const void *arg1
, const void *arg2
)
3927 const asection
*sec1
= *(const asection
**) arg1
;
3928 const asection
*sec2
= *(const asection
**) arg2
;
3929 bfd_size_type size1
, size2
;
3931 /* Sort by LMA first, since this is the address used to
3932 place the section into a segment. */
3933 if (sec1
->lma
< sec2
->lma
)
3935 else if (sec1
->lma
> sec2
->lma
)
3938 /* Then sort by VMA. Normally the LMA and the VMA will be
3939 the same, and this will do nothing. */
3940 if (sec1
->vma
< sec2
->vma
)
3942 else if (sec1
->vma
> sec2
->vma
)
3945 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
3947 #define TOEND(x) (((x)->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0)
3953 /* If the indicies are the same, do not return 0
3954 here, but continue to try the next comparison. */
3955 if (sec1
->target_index
- sec2
->target_index
!= 0)
3956 return sec1
->target_index
- sec2
->target_index
;
3961 else if (TOEND (sec2
))
3966 /* Sort by size, to put zero sized sections
3967 before others at the same address. */
3969 size1
= (sec1
->flags
& SEC_LOAD
) ? sec1
->size
: 0;
3970 size2
= (sec2
->flags
& SEC_LOAD
) ? sec2
->size
: 0;
3977 return sec1
->target_index
- sec2
->target_index
;
3980 /* Ian Lance Taylor writes:
3982 We shouldn't be using % with a negative signed number. That's just
3983 not good. We have to make sure either that the number is not
3984 negative, or that the number has an unsigned type. When the types
3985 are all the same size they wind up as unsigned. When file_ptr is a
3986 larger signed type, the arithmetic winds up as signed long long,
3989 What we're trying to say here is something like ``increase OFF by
3990 the least amount that will cause it to be equal to the VMA modulo
3992 /* In other words, something like:
3994 vma_offset = m->sections[0]->vma % bed->maxpagesize;
3995 off_offset = off % bed->maxpagesize;
3996 if (vma_offset < off_offset)
3997 adjustment = vma_offset + bed->maxpagesize - off_offset;
3999 adjustment = vma_offset - off_offset;
4001 which can can be collapsed into the expression below. */
4004 vma_page_aligned_bias (bfd_vma vma
, ufile_ptr off
, bfd_vma maxpagesize
)
4006 return ((vma
- off
) % maxpagesize
);
4010 print_segment_map (const struct elf_segment_map
*m
)
4013 const char *pt
= get_segment_type (m
->p_type
);
4018 if (m
->p_type
>= PT_LOPROC
&& m
->p_type
<= PT_HIPROC
)
4019 sprintf (buf
, "LOPROC+%7.7x",
4020 (unsigned int) (m
->p_type
- PT_LOPROC
));
4021 else if (m
->p_type
>= PT_LOOS
&& m
->p_type
<= PT_HIOS
)
4022 sprintf (buf
, "LOOS+%7.7x",
4023 (unsigned int) (m
->p_type
- PT_LOOS
));
4025 snprintf (buf
, sizeof (buf
), "%8.8x",
4026 (unsigned int) m
->p_type
);
4029 fprintf (stderr
, "%s:", pt
);
4030 for (j
= 0; j
< m
->count
; j
++)
4031 fprintf (stderr
, " %s", m
->sections
[j
]->name
);
4035 /* Assign file positions to the sections based on the mapping from
4036 sections to segments. This function also sets up some fields in
4040 assign_file_positions_for_load_sections (bfd
*abfd
,
4041 struct bfd_link_info
*link_info
)
4043 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4044 struct elf_segment_map
*m
;
4045 Elf_Internal_Phdr
*phdrs
;
4046 Elf_Internal_Phdr
*p
;
4048 bfd_size_type maxpagesize
;
4052 if (link_info
== NULL
4053 && !elf_modify_segment_map (abfd
, link_info
, FALSE
))
4057 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
4060 elf_elfheader (abfd
)->e_phoff
= bed
->s
->sizeof_ehdr
;
4061 elf_elfheader (abfd
)->e_phentsize
= bed
->s
->sizeof_phdr
;
4062 elf_elfheader (abfd
)->e_phnum
= alloc
;
4064 if (elf_tdata (abfd
)->program_header_size
== (bfd_size_type
) -1)
4065 elf_tdata (abfd
)->program_header_size
= alloc
* bed
->s
->sizeof_phdr
;
4067 BFD_ASSERT (elf_tdata (abfd
)->program_header_size
4068 >= alloc
* bed
->s
->sizeof_phdr
);
4072 elf_tdata (abfd
)->next_file_pos
= bed
->s
->sizeof_ehdr
;
4076 phdrs
= bfd_alloc2 (abfd
, alloc
, sizeof (Elf_Internal_Phdr
));
4077 elf_tdata (abfd
)->phdr
= phdrs
;
4082 if ((abfd
->flags
& D_PAGED
) != 0)
4083 maxpagesize
= bed
->maxpagesize
;
4085 off
= bed
->s
->sizeof_ehdr
;
4086 off
+= alloc
* bed
->s
->sizeof_phdr
;
4088 for (m
= elf_tdata (abfd
)->segment_map
, p
= phdrs
, j
= 0;
4090 m
= m
->next
, p
++, j
++)
4094 bfd_boolean no_contents
;
4096 /* If elf_segment_map is not from map_sections_to_segments, the
4097 sections may not be correctly ordered. NOTE: sorting should
4098 not be done to the PT_NOTE section of a corefile, which may
4099 contain several pseudo-sections artificially created by bfd.
4100 Sorting these pseudo-sections breaks things badly. */
4102 && !(elf_elfheader (abfd
)->e_type
== ET_CORE
4103 && m
->p_type
== PT_NOTE
))
4104 qsort (m
->sections
, (size_t) m
->count
, sizeof (asection
*),
4107 /* An ELF segment (described by Elf_Internal_Phdr) may contain a
4108 number of sections with contents contributing to both p_filesz
4109 and p_memsz, followed by a number of sections with no contents
4110 that just contribute to p_memsz. In this loop, OFF tracks next
4111 available file offset for PT_LOAD and PT_NOTE segments. */
4112 p
->p_type
= m
->p_type
;
4113 p
->p_flags
= m
->p_flags
;
4118 p
->p_vaddr
= m
->sections
[0]->vma
- m
->p_vaddr_offset
;
4120 if (m
->p_paddr_valid
)
4121 p
->p_paddr
= m
->p_paddr
;
4122 else if (m
->count
== 0)
4125 p
->p_paddr
= m
->sections
[0]->lma
- m
->p_vaddr_offset
;
4127 if (p
->p_type
== PT_LOAD
4128 && (abfd
->flags
& D_PAGED
) != 0)
4130 /* p_align in demand paged PT_LOAD segments effectively stores
4131 the maximum page size. When copying an executable with
4132 objcopy, we set m->p_align from the input file. Use this
4133 value for maxpagesize rather than bed->maxpagesize, which
4134 may be different. Note that we use maxpagesize for PT_TLS
4135 segment alignment later in this function, so we are relying
4136 on at least one PT_LOAD segment appearing before a PT_TLS
4138 if (m
->p_align_valid
)
4139 maxpagesize
= m
->p_align
;
4141 p
->p_align
= maxpagesize
;
4143 else if (m
->count
== 0)
4144 p
->p_align
= 1 << bed
->s
->log_file_align
;
4145 else if (m
->p_align_valid
)
4146 p
->p_align
= m
->p_align
;
4150 no_contents
= FALSE
;
4152 if (p
->p_type
== PT_LOAD
4155 bfd_size_type align
;
4156 unsigned int align_power
= 0;
4158 if (m
->p_align_valid
)
4162 for (i
= 0, secpp
= m
->sections
; i
< m
->count
; i
++, secpp
++)
4164 unsigned int secalign
;
4166 secalign
= bfd_get_section_alignment (abfd
, *secpp
);
4167 if (secalign
> align_power
)
4168 align_power
= secalign
;
4170 align
= (bfd_size_type
) 1 << align_power
;
4171 if (align
< maxpagesize
)
4172 align
= maxpagesize
;
4175 for (i
= 0; i
< m
->count
; i
++)
4176 if ((m
->sections
[i
]->flags
& (SEC_LOAD
| SEC_HAS_CONTENTS
)) == 0)
4177 /* If we aren't making room for this section, then
4178 it must be SHT_NOBITS regardless of what we've
4179 set via struct bfd_elf_special_section. */
4180 elf_section_type (m
->sections
[i
]) = SHT_NOBITS
;
4182 /* Find out whether this segment contains any loadable
4183 sections. If the first section isn't loadable, the same
4184 holds for any other sections. */
4186 while (elf_section_type (m
->sections
[i
]) == SHT_NOBITS
)
4188 /* If a segment starts with .tbss, we need to look
4189 at the next section to decide whether the segment
4190 has any loadable sections. */
4191 if ((elf_section_flags (m
->sections
[i
]) & SHF_TLS
) == 0
4199 off_adjust
= vma_page_aligned_bias (m
->sections
[0]->vma
, off
, align
);
4203 /* We shouldn't need to align the segment on disk since
4204 the segment doesn't need file space, but the gABI
4205 arguably requires the alignment and glibc ld.so
4206 checks it. So to comply with the alignment
4207 requirement but not waste file space, we adjust
4208 p_offset for just this segment. (OFF_ADJUST is
4209 subtracted from OFF later.) This may put p_offset
4210 past the end of file, but that shouldn't matter. */
4215 /* Make sure the .dynamic section is the first section in the
4216 PT_DYNAMIC segment. */
4217 else if (p
->p_type
== PT_DYNAMIC
4219 && strcmp (m
->sections
[0]->name
, ".dynamic") != 0)
4222 (_("%B: The first section in the PT_DYNAMIC segment is not the .dynamic section"),
4224 bfd_set_error (bfd_error_bad_value
);
4232 if (m
->includes_filehdr
)
4234 if (!m
->p_flags_valid
)
4236 p
->p_filesz
= bed
->s
->sizeof_ehdr
;
4237 p
->p_memsz
= bed
->s
->sizeof_ehdr
;
4240 BFD_ASSERT (p
->p_type
== PT_LOAD
);
4242 if (p
->p_vaddr
< (bfd_vma
) off
)
4244 (*_bfd_error_handler
)
4245 (_("%B: Not enough room for program headers, try linking with -N"),
4247 bfd_set_error (bfd_error_bad_value
);
4252 if (!m
->p_paddr_valid
)
4257 if (m
->includes_phdrs
)
4259 if (!m
->p_flags_valid
)
4262 if (!m
->includes_filehdr
)
4264 p
->p_offset
= bed
->s
->sizeof_ehdr
;
4268 BFD_ASSERT (p
->p_type
== PT_LOAD
);
4269 p
->p_vaddr
-= off
- p
->p_offset
;
4270 if (!m
->p_paddr_valid
)
4271 p
->p_paddr
-= off
- p
->p_offset
;
4275 p
->p_filesz
+= alloc
* bed
->s
->sizeof_phdr
;
4276 p
->p_memsz
+= alloc
* bed
->s
->sizeof_phdr
;
4279 if (p
->p_type
== PT_LOAD
4280 || (p
->p_type
== PT_NOTE
&& bfd_get_format (abfd
) == bfd_core
))
4282 if (!m
->includes_filehdr
&& !m
->includes_phdrs
)
4288 adjust
= off
- (p
->p_offset
+ p
->p_filesz
);
4290 p
->p_filesz
+= adjust
;
4291 p
->p_memsz
+= adjust
;
4295 /* Set up p_filesz, p_memsz, p_align and p_flags from the section
4296 maps. Set filepos for sections in PT_LOAD segments, and in
4297 core files, for sections in PT_NOTE segments.
4298 assign_file_positions_for_non_load_sections will set filepos
4299 for other sections and update p_filesz for other segments. */
4300 for (i
= 0, secpp
= m
->sections
; i
< m
->count
; i
++, secpp
++)
4303 bfd_size_type align
;
4304 Elf_Internal_Shdr
*this_hdr
;
4307 this_hdr
= &elf_section_data (sec
)->this_hdr
;
4308 align
= (bfd_size_type
) 1 << bfd_get_section_alignment (abfd
, sec
);
4310 if (p
->p_type
== PT_LOAD
4311 || p
->p_type
== PT_TLS
)
4313 bfd_signed_vma adjust
= sec
->lma
- (p
->p_paddr
+ p
->p_memsz
);
4315 if (this_hdr
->sh_type
!= SHT_NOBITS
4316 || ((this_hdr
->sh_flags
& SHF_ALLOC
) != 0
4317 && ((this_hdr
->sh_flags
& SHF_TLS
) == 0
4318 || p
->p_type
== PT_TLS
)))
4322 (*_bfd_error_handler
)
4323 (_("%B: section %A lma 0x%lx overlaps previous sections"),
4324 abfd
, sec
, (unsigned long) sec
->lma
);
4327 p
->p_memsz
+= adjust
;
4329 if (this_hdr
->sh_type
!= SHT_NOBITS
)
4332 p
->p_filesz
+= adjust
;
4337 if (p
->p_type
== PT_NOTE
&& bfd_get_format (abfd
) == bfd_core
)
4339 /* The section at i == 0 is the one that actually contains
4343 this_hdr
->sh_offset
= sec
->filepos
= off
;
4344 off
+= this_hdr
->sh_size
;
4345 p
->p_filesz
= this_hdr
->sh_size
;
4351 /* The rest are fake sections that shouldn't be written. */
4360 if (p
->p_type
== PT_LOAD
)
4362 this_hdr
->sh_offset
= sec
->filepos
= off
;
4363 if (this_hdr
->sh_type
!= SHT_NOBITS
)
4364 off
+= this_hdr
->sh_size
;
4367 if (this_hdr
->sh_type
!= SHT_NOBITS
)
4369 p
->p_filesz
+= this_hdr
->sh_size
;
4370 /* A load section without SHF_ALLOC is something like
4371 a note section in a PT_NOTE segment. These take
4372 file space but are not loaded into memory. */
4373 if ((this_hdr
->sh_flags
& SHF_ALLOC
) != 0)
4374 p
->p_memsz
+= this_hdr
->sh_size
;
4376 else if ((this_hdr
->sh_flags
& SHF_ALLOC
) != 0)
4378 if (p
->p_type
== PT_TLS
)
4379 p
->p_memsz
+= this_hdr
->sh_size
;
4381 /* .tbss is special. It doesn't contribute to p_memsz of
4383 else if ((this_hdr
->sh_flags
& SHF_TLS
) == 0)
4384 p
->p_memsz
+= this_hdr
->sh_size
;
4387 if (p
->p_type
== PT_GNU_RELRO
)
4389 else if (align
> p
->p_align
4390 && !m
->p_align_valid
4391 && (p
->p_type
!= PT_LOAD
4392 || (abfd
->flags
& D_PAGED
) == 0))
4396 if (!m
->p_flags_valid
)
4399 if ((this_hdr
->sh_flags
& SHF_EXECINSTR
) != 0)
4401 if ((this_hdr
->sh_flags
& SHF_WRITE
) != 0)
4407 /* Check that all sections are in a PT_LOAD segment.
4408 Don't check funky gdb generated core files. */
4409 if (p
->p_type
== PT_LOAD
&& bfd_get_format (abfd
) != bfd_core
)
4410 for (i
= 0, secpp
= m
->sections
; i
< m
->count
; i
++, secpp
++)
4412 Elf_Internal_Shdr
*this_hdr
;
4416 this_hdr
= &(elf_section_data(sec
)->this_hdr
);
4417 if (this_hdr
->sh_size
!= 0
4418 && !ELF_IS_SECTION_IN_SEGMENT_FILE (this_hdr
, p
))
4420 (*_bfd_error_handler
)
4421 (_("%B: section `%A' can't be allocated in segment %d"),
4423 print_segment_map (m
);
4424 bfd_set_error (bfd_error_bad_value
);
4430 elf_tdata (abfd
)->next_file_pos
= off
;
4434 /* Assign file positions for the other sections. */
4437 assign_file_positions_for_non_load_sections (bfd
*abfd
,
4438 struct bfd_link_info
*link_info
)
4440 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4441 Elf_Internal_Shdr
**i_shdrpp
;
4442 Elf_Internal_Shdr
**hdrpp
;
4443 Elf_Internal_Phdr
*phdrs
;
4444 Elf_Internal_Phdr
*p
;
4445 struct elf_segment_map
*m
;
4446 bfd_vma filehdr_vaddr
, filehdr_paddr
;
4447 bfd_vma phdrs_vaddr
, phdrs_paddr
;
4449 unsigned int num_sec
;
4453 i_shdrpp
= elf_elfsections (abfd
);
4454 num_sec
= elf_numsections (abfd
);
4455 off
= elf_tdata (abfd
)->next_file_pos
;
4456 for (i
= 1, hdrpp
= i_shdrpp
+ 1; i
< num_sec
; i
++, hdrpp
++)
4458 struct elf_obj_tdata
*tdata
= elf_tdata (abfd
);
4459 Elf_Internal_Shdr
*hdr
;
4462 if (hdr
->bfd_section
!= NULL
4463 && (hdr
->bfd_section
->filepos
!= 0
4464 || (hdr
->sh_type
== SHT_NOBITS
4465 && hdr
->contents
== NULL
)))
4466 BFD_ASSERT (hdr
->sh_offset
== hdr
->bfd_section
->filepos
);
4467 else if ((hdr
->sh_flags
& SHF_ALLOC
) != 0)
4469 if (hdr
->sh_size
!= 0)
4470 ((*_bfd_error_handler
)
4471 (_("%B: warning: allocated section `%s' not in segment"),
4473 (hdr
->bfd_section
== NULL
4475 : hdr
->bfd_section
->name
)));
4476 /* We don't need to page align empty sections. */
4477 if ((abfd
->flags
& D_PAGED
) != 0 && hdr
->sh_size
!= 0)
4478 off
+= vma_page_aligned_bias (hdr
->sh_addr
, off
,
4481 off
+= vma_page_aligned_bias (hdr
->sh_addr
, off
,
4483 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
,
4486 else if (((hdr
->sh_type
== SHT_REL
|| hdr
->sh_type
== SHT_RELA
)
4487 && hdr
->bfd_section
== NULL
)
4488 || hdr
== i_shdrpp
[tdata
->symtab_section
]
4489 || hdr
== i_shdrpp
[tdata
->symtab_shndx_section
]
4490 || hdr
== i_shdrpp
[tdata
->strtab_section
])
4491 hdr
->sh_offset
= -1;
4493 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
4495 if (i
== SHN_LORESERVE
- 1)
4497 i
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4498 hdrpp
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4502 /* Now that we have set the section file positions, we can set up
4503 the file positions for the non PT_LOAD segments. */
4507 phdrs_vaddr
= bed
->maxpagesize
+ bed
->s
->sizeof_ehdr
;
4509 phdrs
= elf_tdata (abfd
)->phdr
;
4510 for (m
= elf_tdata (abfd
)->segment_map
, p
= phdrs
;
4515 if (p
->p_type
!= PT_LOAD
)
4518 if (m
->includes_filehdr
)
4520 filehdr_vaddr
= p
->p_vaddr
;
4521 filehdr_paddr
= p
->p_paddr
;
4523 if (m
->includes_phdrs
)
4525 phdrs_vaddr
= p
->p_vaddr
;
4526 phdrs_paddr
= p
->p_paddr
;
4527 if (m
->includes_filehdr
)
4529 phdrs_vaddr
+= bed
->s
->sizeof_ehdr
;
4530 phdrs_paddr
+= bed
->s
->sizeof_ehdr
;
4535 for (m
= elf_tdata (abfd
)->segment_map
, p
= phdrs
;
4541 if (p
->p_type
!= PT_LOAD
4542 && (p
->p_type
!= PT_NOTE
|| bfd_get_format (abfd
) != bfd_core
))
4544 Elf_Internal_Shdr
*hdr
;
4545 BFD_ASSERT (!m
->includes_filehdr
&& !m
->includes_phdrs
);
4547 hdr
= &elf_section_data (m
->sections
[m
->count
- 1])->this_hdr
;
4548 p
->p_filesz
= (m
->sections
[m
->count
- 1]->filepos
4549 - m
->sections
[0]->filepos
);
4550 if (hdr
->sh_type
!= SHT_NOBITS
)
4551 p
->p_filesz
+= hdr
->sh_size
;
4553 p
->p_offset
= m
->sections
[0]->filepos
;
4558 if (m
->includes_filehdr
)
4560 p
->p_vaddr
= filehdr_vaddr
;
4561 if (! m
->p_paddr_valid
)
4562 p
->p_paddr
= filehdr_paddr
;
4564 else if (m
->includes_phdrs
)
4566 p
->p_vaddr
= phdrs_vaddr
;
4567 if (! m
->p_paddr_valid
)
4568 p
->p_paddr
= phdrs_paddr
;
4570 else if (p
->p_type
== PT_GNU_RELRO
)
4572 Elf_Internal_Phdr
*lp
;
4574 for (lp
= phdrs
; lp
< phdrs
+ count
; ++lp
)
4576 if (lp
->p_type
== PT_LOAD
4577 && lp
->p_vaddr
<= link_info
->relro_end
4578 && lp
->p_vaddr
>= link_info
->relro_start
4579 && (lp
->p_vaddr
+ lp
->p_filesz
4580 >= link_info
->relro_end
))
4584 if (lp
< phdrs
+ count
4585 && link_info
->relro_end
> lp
->p_vaddr
)
4587 p
->p_vaddr
= lp
->p_vaddr
;
4588 p
->p_paddr
= lp
->p_paddr
;
4589 p
->p_offset
= lp
->p_offset
;
4590 p
->p_filesz
= link_info
->relro_end
- lp
->p_vaddr
;
4591 p
->p_memsz
= p
->p_filesz
;
4593 p
->p_flags
= (lp
->p_flags
& ~PF_W
);
4597 memset (p
, 0, sizeof *p
);
4598 p
->p_type
= PT_NULL
;
4604 elf_tdata (abfd
)->next_file_pos
= off
;
4609 /* Work out the file positions of all the sections. This is called by
4610 _bfd_elf_compute_section_file_positions. All the section sizes and
4611 VMAs must be known before this is called.
4613 Reloc sections come in two flavours: Those processed specially as
4614 "side-channel" data attached to a section to which they apply, and
4615 those that bfd doesn't process as relocations. The latter sort are
4616 stored in a normal bfd section by bfd_section_from_shdr. We don't
4617 consider the former sort here, unless they form part of the loadable
4618 image. Reloc sections not assigned here will be handled later by
4619 assign_file_positions_for_relocs.
4621 We also don't set the positions of the .symtab and .strtab here. */
4624 assign_file_positions_except_relocs (bfd
*abfd
,
4625 struct bfd_link_info
*link_info
)
4627 struct elf_obj_tdata
*tdata
= elf_tdata (abfd
);
4628 Elf_Internal_Ehdr
*i_ehdrp
= elf_elfheader (abfd
);
4630 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4632 if ((abfd
->flags
& (EXEC_P
| DYNAMIC
)) == 0
4633 && bfd_get_format (abfd
) != bfd_core
)
4635 Elf_Internal_Shdr
** const i_shdrpp
= elf_elfsections (abfd
);
4636 unsigned int num_sec
= elf_numsections (abfd
);
4637 Elf_Internal_Shdr
**hdrpp
;
4640 /* Start after the ELF header. */
4641 off
= i_ehdrp
->e_ehsize
;
4643 /* We are not creating an executable, which means that we are
4644 not creating a program header, and that the actual order of
4645 the sections in the file is unimportant. */
4646 for (i
= 1, hdrpp
= i_shdrpp
+ 1; i
< num_sec
; i
++, hdrpp
++)
4648 Elf_Internal_Shdr
*hdr
;
4651 if (((hdr
->sh_type
== SHT_REL
|| hdr
->sh_type
== SHT_RELA
)
4652 && hdr
->bfd_section
== NULL
)
4653 || i
== tdata
->symtab_section
4654 || i
== tdata
->symtab_shndx_section
4655 || i
== tdata
->strtab_section
)
4657 hdr
->sh_offset
= -1;
4660 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
4662 if (i
== SHN_LORESERVE
- 1)
4664 i
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4665 hdrpp
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4673 /* Assign file positions for the loaded sections based on the
4674 assignment of sections to segments. */
4675 if (!assign_file_positions_for_load_sections (abfd
, link_info
))
4678 /* And for non-load sections. */
4679 if (!assign_file_positions_for_non_load_sections (abfd
, link_info
))
4682 if (bed
->elf_backend_modify_program_headers
!= NULL
)
4684 if (!(*bed
->elf_backend_modify_program_headers
) (abfd
, link_info
))
4688 /* Write out the program headers. */
4689 alloc
= tdata
->program_header_size
/ bed
->s
->sizeof_phdr
;
4690 if (bfd_seek (abfd
, (bfd_signed_vma
) bed
->s
->sizeof_ehdr
, SEEK_SET
) != 0
4691 || bed
->s
->write_out_phdrs (abfd
, tdata
->phdr
, alloc
) != 0)
4694 off
= tdata
->next_file_pos
;
4697 /* Place the section headers. */
4698 off
= align_file_position (off
, 1 << bed
->s
->log_file_align
);
4699 i_ehdrp
->e_shoff
= off
;
4700 off
+= i_ehdrp
->e_shnum
* i_ehdrp
->e_shentsize
;
4702 tdata
->next_file_pos
= off
;
4708 prep_headers (bfd
*abfd
)
4710 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
4711 Elf_Internal_Phdr
*i_phdrp
= 0; /* Program header table, internal form */
4712 Elf_Internal_Shdr
**i_shdrp
; /* Section header table, internal form */
4713 struct elf_strtab_hash
*shstrtab
;
4714 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4716 i_ehdrp
= elf_elfheader (abfd
);
4717 i_shdrp
= elf_elfsections (abfd
);
4719 shstrtab
= _bfd_elf_strtab_init ();
4720 if (shstrtab
== NULL
)
4723 elf_shstrtab (abfd
) = shstrtab
;
4725 i_ehdrp
->e_ident
[EI_MAG0
] = ELFMAG0
;
4726 i_ehdrp
->e_ident
[EI_MAG1
] = ELFMAG1
;
4727 i_ehdrp
->e_ident
[EI_MAG2
] = ELFMAG2
;
4728 i_ehdrp
->e_ident
[EI_MAG3
] = ELFMAG3
;
4730 i_ehdrp
->e_ident
[EI_CLASS
] = bed
->s
->elfclass
;
4731 i_ehdrp
->e_ident
[EI_DATA
] =
4732 bfd_big_endian (abfd
) ? ELFDATA2MSB
: ELFDATA2LSB
;
4733 i_ehdrp
->e_ident
[EI_VERSION
] = bed
->s
->ev_current
;
4735 if ((abfd
->flags
& DYNAMIC
) != 0)
4736 i_ehdrp
->e_type
= ET_DYN
;
4737 else if ((abfd
->flags
& EXEC_P
) != 0)
4738 i_ehdrp
->e_type
= ET_EXEC
;
4739 else if (bfd_get_format (abfd
) == bfd_core
)
4740 i_ehdrp
->e_type
= ET_CORE
;
4742 i_ehdrp
->e_type
= ET_REL
;
4744 switch (bfd_get_arch (abfd
))
4746 case bfd_arch_unknown
:
4747 i_ehdrp
->e_machine
= EM_NONE
;
4750 /* There used to be a long list of cases here, each one setting
4751 e_machine to the same EM_* macro #defined as ELF_MACHINE_CODE
4752 in the corresponding bfd definition. To avoid duplication,
4753 the switch was removed. Machines that need special handling
4754 can generally do it in elf_backend_final_write_processing(),
4755 unless they need the information earlier than the final write.
4756 Such need can generally be supplied by replacing the tests for
4757 e_machine with the conditions used to determine it. */
4759 i_ehdrp
->e_machine
= bed
->elf_machine_code
;
4762 i_ehdrp
->e_version
= bed
->s
->ev_current
;
4763 i_ehdrp
->e_ehsize
= bed
->s
->sizeof_ehdr
;
4765 /* No program header, for now. */
4766 i_ehdrp
->e_phoff
= 0;
4767 i_ehdrp
->e_phentsize
= 0;
4768 i_ehdrp
->e_phnum
= 0;
4770 /* Each bfd section is section header entry. */
4771 i_ehdrp
->e_entry
= bfd_get_start_address (abfd
);
4772 i_ehdrp
->e_shentsize
= bed
->s
->sizeof_shdr
;
4774 /* If we're building an executable, we'll need a program header table. */
4775 if (abfd
->flags
& EXEC_P
)
4776 /* It all happens later. */
4780 i_ehdrp
->e_phentsize
= 0;
4782 i_ehdrp
->e_phoff
= 0;
4785 elf_tdata (abfd
)->symtab_hdr
.sh_name
=
4786 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".symtab", FALSE
);
4787 elf_tdata (abfd
)->strtab_hdr
.sh_name
=
4788 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".strtab", FALSE
);
4789 elf_tdata (abfd
)->shstrtab_hdr
.sh_name
=
4790 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".shstrtab", FALSE
);
4791 if (elf_tdata (abfd
)->symtab_hdr
.sh_name
== (unsigned int) -1
4792 || elf_tdata (abfd
)->symtab_hdr
.sh_name
== (unsigned int) -1
4793 || elf_tdata (abfd
)->shstrtab_hdr
.sh_name
== (unsigned int) -1)
4799 /* Assign file positions for all the reloc sections which are not part
4800 of the loadable file image. */
4803 _bfd_elf_assign_file_positions_for_relocs (bfd
*abfd
)
4806 unsigned int i
, num_sec
;
4807 Elf_Internal_Shdr
**shdrpp
;
4809 off
= elf_tdata (abfd
)->next_file_pos
;
4811 num_sec
= elf_numsections (abfd
);
4812 for (i
= 1, shdrpp
= elf_elfsections (abfd
) + 1; i
< num_sec
; i
++, shdrpp
++)
4814 Elf_Internal_Shdr
*shdrp
;
4817 if ((shdrp
->sh_type
== SHT_REL
|| shdrp
->sh_type
== SHT_RELA
)
4818 && shdrp
->sh_offset
== -1)
4819 off
= _bfd_elf_assign_file_position_for_section (shdrp
, off
, TRUE
);
4822 elf_tdata (abfd
)->next_file_pos
= off
;
4826 _bfd_elf_write_object_contents (bfd
*abfd
)
4828 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4829 Elf_Internal_Ehdr
*i_ehdrp
;
4830 Elf_Internal_Shdr
**i_shdrp
;
4832 unsigned int count
, num_sec
;
4834 if (! abfd
->output_has_begun
4835 && ! _bfd_elf_compute_section_file_positions (abfd
, NULL
))
4838 i_shdrp
= elf_elfsections (abfd
);
4839 i_ehdrp
= elf_elfheader (abfd
);
4842 bfd_map_over_sections (abfd
, bed
->s
->write_relocs
, &failed
);
4846 _bfd_elf_assign_file_positions_for_relocs (abfd
);
4848 /* After writing the headers, we need to write the sections too... */
4849 num_sec
= elf_numsections (abfd
);
4850 for (count
= 1; count
< num_sec
; count
++)
4852 if (bed
->elf_backend_section_processing
)
4853 (*bed
->elf_backend_section_processing
) (abfd
, i_shdrp
[count
]);
4854 if (i_shdrp
[count
]->contents
)
4856 bfd_size_type amt
= i_shdrp
[count
]->sh_size
;
4858 if (bfd_seek (abfd
, i_shdrp
[count
]->sh_offset
, SEEK_SET
) != 0
4859 || bfd_bwrite (i_shdrp
[count
]->contents
, amt
, abfd
) != amt
)
4862 if (count
== SHN_LORESERVE
- 1)
4863 count
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4866 /* Write out the section header names. */
4867 if (elf_shstrtab (abfd
) != NULL
4868 && (bfd_seek (abfd
, elf_tdata (abfd
)->shstrtab_hdr
.sh_offset
, SEEK_SET
) != 0
4869 || !_bfd_elf_strtab_emit (abfd
, elf_shstrtab (abfd
))))
4872 if (bed
->elf_backend_final_write_processing
)
4873 (*bed
->elf_backend_final_write_processing
) (abfd
,
4874 elf_tdata (abfd
)->linker
);
4876 if (!bed
->s
->write_shdrs_and_ehdr (abfd
))
4879 /* This is last since write_shdrs_and_ehdr can touch i_shdrp[0]. */
4880 if (elf_tdata (abfd
)->after_write_object_contents
)
4881 return (*elf_tdata (abfd
)->after_write_object_contents
) (abfd
);
4887 _bfd_elf_write_corefile_contents (bfd
*abfd
)
4889 /* Hopefully this can be done just like an object file. */
4890 return _bfd_elf_write_object_contents (abfd
);
4893 /* Given a section, search the header to find them. */
4896 _bfd_elf_section_from_bfd_section (bfd
*abfd
, struct bfd_section
*asect
)
4898 const struct elf_backend_data
*bed
;
4901 if (elf_section_data (asect
) != NULL
4902 && elf_section_data (asect
)->this_idx
!= 0)
4903 return elf_section_data (asect
)->this_idx
;
4905 if (bfd_is_abs_section (asect
))
4907 else if (bfd_is_com_section (asect
))
4909 else if (bfd_is_und_section (asect
))
4914 bed
= get_elf_backend_data (abfd
);
4915 if (bed
->elf_backend_section_from_bfd_section
)
4919 if ((*bed
->elf_backend_section_from_bfd_section
) (abfd
, asect
, &retval
))
4924 bfd_set_error (bfd_error_nonrepresentable_section
);
4929 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
4933 _bfd_elf_symbol_from_bfd_symbol (bfd
*abfd
, asymbol
**asym_ptr_ptr
)
4935 asymbol
*asym_ptr
= *asym_ptr_ptr
;
4937 flagword flags
= asym_ptr
->flags
;
4939 /* When gas creates relocations against local labels, it creates its
4940 own symbol for the section, but does put the symbol into the
4941 symbol chain, so udata is 0. When the linker is generating
4942 relocatable output, this section symbol may be for one of the
4943 input sections rather than the output section. */
4944 if (asym_ptr
->udata
.i
== 0
4945 && (flags
& BSF_SECTION_SYM
)
4946 && asym_ptr
->section
)
4951 sec
= asym_ptr
->section
;
4952 if (sec
->owner
!= abfd
&& sec
->output_section
!= NULL
)
4953 sec
= sec
->output_section
;
4954 if (sec
->owner
== abfd
4955 && (indx
= sec
->index
) < elf_num_section_syms (abfd
)
4956 && elf_section_syms (abfd
)[indx
] != NULL
)
4957 asym_ptr
->udata
.i
= elf_section_syms (abfd
)[indx
]->udata
.i
;
4960 idx
= asym_ptr
->udata
.i
;
4964 /* This case can occur when using --strip-symbol on a symbol
4965 which is used in a relocation entry. */
4966 (*_bfd_error_handler
)
4967 (_("%B: symbol `%s' required but not present"),
4968 abfd
, bfd_asymbol_name (asym_ptr
));
4969 bfd_set_error (bfd_error_no_symbols
);
4976 "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n",
4977 (long) asym_ptr
, asym_ptr
->name
, idx
, flags
,
4978 elf_symbol_flags (flags
));
4986 /* Rewrite program header information. */
4989 rewrite_elf_program_header (bfd
*ibfd
, bfd
*obfd
)
4991 Elf_Internal_Ehdr
*iehdr
;
4992 struct elf_segment_map
*map
;
4993 struct elf_segment_map
*map_first
;
4994 struct elf_segment_map
**pointer_to_map
;
4995 Elf_Internal_Phdr
*segment
;
4998 unsigned int num_segments
;
4999 bfd_boolean phdr_included
= FALSE
;
5000 bfd_vma maxpagesize
;
5001 struct elf_segment_map
*phdr_adjust_seg
= NULL
;
5002 unsigned int phdr_adjust_num
= 0;
5003 const struct elf_backend_data
*bed
;
5005 bed
= get_elf_backend_data (ibfd
);
5006 iehdr
= elf_elfheader (ibfd
);
5009 pointer_to_map
= &map_first
;
5011 num_segments
= elf_elfheader (ibfd
)->e_phnum
;
5012 maxpagesize
= get_elf_backend_data (obfd
)->maxpagesize
;
5014 /* Returns the end address of the segment + 1. */
5015 #define SEGMENT_END(segment, start) \
5016 (start + (segment->p_memsz > segment->p_filesz \
5017 ? segment->p_memsz : segment->p_filesz))
5019 #define SECTION_SIZE(section, segment) \
5020 (((section->flags & (SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) \
5021 != SEC_THREAD_LOCAL || segment->p_type == PT_TLS) \
5022 ? section->size : 0)
5024 /* Returns TRUE if the given section is contained within
5025 the given segment. VMA addresses are compared. */
5026 #define IS_CONTAINED_BY_VMA(section, segment) \
5027 (section->vma >= segment->p_vaddr \
5028 && (section->vma + SECTION_SIZE (section, segment) \
5029 <= (SEGMENT_END (segment, segment->p_vaddr))))
5031 /* Returns TRUE if the given section is contained within
5032 the given segment. LMA addresses are compared. */
5033 #define IS_CONTAINED_BY_LMA(section, segment, base) \
5034 (section->lma >= base \
5035 && (section->lma + SECTION_SIZE (section, segment) \
5036 <= SEGMENT_END (segment, base)))
5038 /* Special case: corefile "NOTE" section containing regs, prpsinfo etc. */
5039 #define IS_COREFILE_NOTE(p, s) \
5040 (p->p_type == PT_NOTE \
5041 && bfd_get_format (ibfd) == bfd_core \
5042 && s->vma == 0 && s->lma == 0 \
5043 && (bfd_vma) s->filepos >= p->p_offset \
5044 && ((bfd_vma) s->filepos + s->size \
5045 <= p->p_offset + p->p_filesz))
5047 /* The complicated case when p_vaddr is 0 is to handle the Solaris
5048 linker, which generates a PT_INTERP section with p_vaddr and
5049 p_memsz set to 0. */
5050 #define IS_SOLARIS_PT_INTERP(p, s) \
5052 && p->p_paddr == 0 \
5053 && p->p_memsz == 0 \
5054 && p->p_filesz > 0 \
5055 && (s->flags & SEC_HAS_CONTENTS) != 0 \
5057 && (bfd_vma) s->filepos >= p->p_offset \
5058 && ((bfd_vma) s->filepos + s->size \
5059 <= p->p_offset + p->p_filesz))
5061 /* Decide if the given section should be included in the given segment.
5062 A section will be included if:
5063 1. It is within the address space of the segment -- we use the LMA
5064 if that is set for the segment and the VMA otherwise,
5065 2. It is an allocated segment,
5066 3. There is an output section associated with it,
5067 4. The section has not already been allocated to a previous segment.
5068 5. PT_GNU_ATTR only contains attribute section.
5069 6. PT_TLS segment includes only SHF_TLS sections.
5070 7. SHF_TLS sections are only in PT_TLS or PT_LOAD segments.
5071 8. PT_DYNAMIC should not contain empty sections at the beginning
5072 (with the possible exception of .dynamic). */
5073 #define IS_SECTION_IN_INPUT_SEGMENT(section, segment, bed) \
5074 ((segment->p_type == PT_GNU_ATTR \
5075 && elf_section_type (section) == bed->obj_attrs_section_type) \
5076 || ((((segment->p_paddr \
5077 ? IS_CONTAINED_BY_LMA (section, segment, segment->p_paddr) \
5078 : IS_CONTAINED_BY_VMA (section, segment)) \
5079 && (section->flags & SEC_ALLOC) != 0) \
5080 || IS_COREFILE_NOTE (segment, section)) \
5081 && segment->p_type != PT_GNU_ATTR \
5082 && (segment->p_type != PT_TLS \
5083 || (section->flags & SEC_THREAD_LOCAL)) \
5084 && (segment->p_type == PT_LOAD \
5085 || segment->p_type == PT_TLS \
5086 || (section->flags & SEC_THREAD_LOCAL) == 0) \
5087 && (segment->p_type != PT_DYNAMIC \
5088 || SECTION_SIZE (section, segment) > 0 \
5089 || (segment->p_paddr \
5090 ? segment->p_paddr != section->lma \
5091 : segment->p_vaddr != section->vma) \
5092 || (strcmp (bfd_get_section_name (ibfd, section), \
5093 ".dynamic") == 0)) \
5094 && ! section->segment_mark))
5096 /* If the output section of a section in the input segment is NULL,
5097 it is removed from the corresponding output segment. */
5098 #define INCLUDE_SECTION_IN_SEGMENT(section, segment, bed) \
5099 (IS_SECTION_IN_INPUT_SEGMENT (section, segment, bed) \
5100 && section->output_section != NULL)
5102 /* Returns TRUE iff seg1 starts after the end of seg2. */
5103 #define SEGMENT_AFTER_SEGMENT(seg1, seg2, field) \
5104 (seg1->field >= SEGMENT_END (seg2, seg2->field))
5106 /* Returns TRUE iff seg1 and seg2 overlap. Segments overlap iff both
5107 their VMA address ranges and their LMA address ranges overlap.
5108 It is possible to have overlapping VMA ranges without overlapping LMA
5109 ranges. RedBoot images for example can have both .data and .bss mapped
5110 to the same VMA range, but with the .data section mapped to a different
5112 #define SEGMENT_OVERLAPS(seg1, seg2) \
5113 ( !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_vaddr) \
5114 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_vaddr)) \
5115 && !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_paddr) \
5116 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_paddr)))
5118 /* Initialise the segment mark field. */
5119 for (section
= ibfd
->sections
; section
!= NULL
; section
= section
->next
)
5120 section
->segment_mark
= FALSE
;
5122 /* Scan through the segments specified in the program header
5123 of the input BFD. For this first scan we look for overlaps
5124 in the loadable segments. These can be created by weird
5125 parameters to objcopy. Also, fix some solaris weirdness. */
5126 for (i
= 0, segment
= elf_tdata (ibfd
)->phdr
;
5131 Elf_Internal_Phdr
*segment2
;
5133 if (segment
->p_type
== PT_INTERP
)
5134 for (section
= ibfd
->sections
; section
; section
= section
->next
)
5135 if (IS_SOLARIS_PT_INTERP (segment
, section
))
5137 /* Mininal change so that the normal section to segment
5138 assignment code will work. */
5139 segment
->p_vaddr
= section
->vma
;
5143 if (segment
->p_type
!= PT_LOAD
)
5146 /* Determine if this segment overlaps any previous segments. */
5147 for (j
= 0, segment2
= elf_tdata (ibfd
)->phdr
; j
< i
; j
++, segment2
++)
5149 bfd_signed_vma extra_length
;
5151 if (segment2
->p_type
!= PT_LOAD
5152 || ! SEGMENT_OVERLAPS (segment
, segment2
))
5155 /* Merge the two segments together. */
5156 if (segment2
->p_vaddr
< segment
->p_vaddr
)
5158 /* Extend SEGMENT2 to include SEGMENT and then delete
5161 SEGMENT_END (segment
, segment
->p_vaddr
)
5162 - SEGMENT_END (segment2
, segment2
->p_vaddr
);
5164 if (extra_length
> 0)
5166 segment2
->p_memsz
+= extra_length
;
5167 segment2
->p_filesz
+= extra_length
;
5170 segment
->p_type
= PT_NULL
;
5172 /* Since we have deleted P we must restart the outer loop. */
5174 segment
= elf_tdata (ibfd
)->phdr
;
5179 /* Extend SEGMENT to include SEGMENT2 and then delete
5182 SEGMENT_END (segment2
, segment2
->p_vaddr
)
5183 - SEGMENT_END (segment
, segment
->p_vaddr
);
5185 if (extra_length
> 0)
5187 segment
->p_memsz
+= extra_length
;
5188 segment
->p_filesz
+= extra_length
;
5191 segment2
->p_type
= PT_NULL
;
5196 /* The second scan attempts to assign sections to segments. */
5197 for (i
= 0, segment
= elf_tdata (ibfd
)->phdr
;
5201 unsigned int section_count
;
5202 asection
** sections
;
5203 asection
* output_section
;
5205 bfd_vma matching_lma
;
5206 bfd_vma suggested_lma
;
5209 asection
* first_section
;
5211 if (segment
->p_type
== PT_NULL
)
5214 first_section
= NULL
;
5215 /* Compute how many sections might be placed into this segment. */
5216 for (section
= ibfd
->sections
, section_count
= 0;
5218 section
= section
->next
)
5220 /* Find the first section in the input segment, which may be
5221 removed from the corresponding output segment. */
5222 if (IS_SECTION_IN_INPUT_SEGMENT (section
, segment
, bed
))
5224 if (first_section
== NULL
)
5225 first_section
= section
;
5226 if (section
->output_section
!= NULL
)
5231 /* Allocate a segment map big enough to contain
5232 all of the sections we have selected. */
5233 amt
= sizeof (struct elf_segment_map
);
5234 amt
+= ((bfd_size_type
) section_count
- 1) * sizeof (asection
*);
5235 map
= bfd_zalloc (obfd
, amt
);
5239 /* Initialise the fields of the segment map. Default to
5240 using the physical address of the segment in the input BFD. */
5242 map
->p_type
= segment
->p_type
;
5243 map
->p_flags
= segment
->p_flags
;
5244 map
->p_flags_valid
= 1;
5246 /* If the first section in the input segment is removed, there is
5247 no need to preserve segment physical address in the corresponding
5249 if (!first_section
|| first_section
->output_section
!= NULL
)
5251 map
->p_paddr
= segment
->p_paddr
;
5252 map
->p_paddr_valid
= 1;
5255 /* Determine if this segment contains the ELF file header
5256 and if it contains the program headers themselves. */
5257 map
->includes_filehdr
= (segment
->p_offset
== 0
5258 && segment
->p_filesz
>= iehdr
->e_ehsize
);
5260 map
->includes_phdrs
= 0;
5262 if (! phdr_included
|| segment
->p_type
!= PT_LOAD
)
5264 map
->includes_phdrs
=
5265 (segment
->p_offset
<= (bfd_vma
) iehdr
->e_phoff
5266 && (segment
->p_offset
+ segment
->p_filesz
5267 >= ((bfd_vma
) iehdr
->e_phoff
5268 + iehdr
->e_phnum
* iehdr
->e_phentsize
)));
5270 if (segment
->p_type
== PT_LOAD
&& map
->includes_phdrs
)
5271 phdr_included
= TRUE
;
5274 if (section_count
== 0)
5276 /* Special segments, such as the PT_PHDR segment, may contain
5277 no sections, but ordinary, loadable segments should contain
5278 something. They are allowed by the ELF spec however, so only
5279 a warning is produced. */
5280 if (segment
->p_type
== PT_LOAD
)
5281 (*_bfd_error_handler
)
5282 (_("%B: warning: Empty loadable segment detected, is this intentional ?\n"),
5286 *pointer_to_map
= map
;
5287 pointer_to_map
= &map
->next
;
5292 /* Now scan the sections in the input BFD again and attempt
5293 to add their corresponding output sections to the segment map.
5294 The problem here is how to handle an output section which has
5295 been moved (ie had its LMA changed). There are four possibilities:
5297 1. None of the sections have been moved.
5298 In this case we can continue to use the segment LMA from the
5301 2. All of the sections have been moved by the same amount.
5302 In this case we can change the segment's LMA to match the LMA
5303 of the first section.
5305 3. Some of the sections have been moved, others have not.
5306 In this case those sections which have not been moved can be
5307 placed in the current segment which will have to have its size,
5308 and possibly its LMA changed, and a new segment or segments will
5309 have to be created to contain the other sections.
5311 4. The sections have been moved, but not by the same amount.
5312 In this case we can change the segment's LMA to match the LMA
5313 of the first section and we will have to create a new segment
5314 or segments to contain the other sections.
5316 In order to save time, we allocate an array to hold the section
5317 pointers that we are interested in. As these sections get assigned
5318 to a segment, they are removed from this array. */
5320 /* Gcc 2.96 miscompiles this code on mips. Don't do casting here
5321 to work around this long long bug. */
5322 sections
= bfd_malloc2 (section_count
, sizeof (asection
*));
5323 if (sections
== NULL
)
5326 /* Step One: Scan for segment vs section LMA conflicts.
5327 Also add the sections to the section array allocated above.
5328 Also add the sections to the current segment. In the common
5329 case, where the sections have not been moved, this means that
5330 we have completely filled the segment, and there is nothing
5336 for (j
= 0, section
= ibfd
->sections
;
5338 section
= section
->next
)
5340 if (INCLUDE_SECTION_IN_SEGMENT (section
, segment
, bed
))
5342 output_section
= section
->output_section
;
5344 sections
[j
++] = section
;
5346 /* The Solaris native linker always sets p_paddr to 0.
5347 We try to catch that case here, and set it to the
5348 correct value. Note - some backends require that
5349 p_paddr be left as zero. */
5350 if (segment
->p_paddr
== 0
5351 && segment
->p_vaddr
!= 0
5352 && (! bed
->want_p_paddr_set_to_zero
)
5354 && output_section
->lma
!= 0
5355 && (output_section
->vma
== (segment
->p_vaddr
5356 + (map
->includes_filehdr
5359 + (map
->includes_phdrs
5361 * iehdr
->e_phentsize
)
5363 map
->p_paddr
= segment
->p_vaddr
;
5365 /* Match up the physical address of the segment with the
5366 LMA address of the output section. */
5367 if (IS_CONTAINED_BY_LMA (output_section
, segment
, map
->p_paddr
)
5368 || IS_COREFILE_NOTE (segment
, section
)
5369 || (bed
->want_p_paddr_set_to_zero
&&
5370 IS_CONTAINED_BY_VMA (output_section
, segment
)))
5372 if (matching_lma
== 0 || output_section
->lma
< matching_lma
)
5373 matching_lma
= output_section
->lma
;
5375 /* We assume that if the section fits within the segment
5376 then it does not overlap any other section within that
5378 map
->sections
[isec
++] = output_section
;
5380 else if (suggested_lma
== 0)
5381 suggested_lma
= output_section
->lma
;
5385 BFD_ASSERT (j
== section_count
);
5387 /* Step Two: Adjust the physical address of the current segment,
5389 if (isec
== section_count
)
5391 /* All of the sections fitted within the segment as currently
5392 specified. This is the default case. Add the segment to
5393 the list of built segments and carry on to process the next
5394 program header in the input BFD. */
5395 map
->count
= section_count
;
5396 *pointer_to_map
= map
;
5397 pointer_to_map
= &map
->next
;
5399 if (matching_lma
!= map
->p_paddr
5400 && !map
->includes_filehdr
&& !map
->includes_phdrs
)
5401 /* There is some padding before the first section in the
5402 segment. So, we must account for that in the output
5404 map
->p_vaddr_offset
= matching_lma
- map
->p_paddr
;
5411 if (matching_lma
!= 0)
5413 /* At least one section fits inside the current segment.
5414 Keep it, but modify its physical address to match the
5415 LMA of the first section that fitted. */
5416 map
->p_paddr
= matching_lma
;
5420 /* None of the sections fitted inside the current segment.
5421 Change the current segment's physical address to match
5422 the LMA of the first section. */
5423 map
->p_paddr
= suggested_lma
;
5426 /* Offset the segment physical address from the lma
5427 to allow for space taken up by elf headers. */
5428 if (map
->includes_filehdr
)
5429 map
->p_paddr
-= iehdr
->e_ehsize
;
5431 if (map
->includes_phdrs
)
5433 map
->p_paddr
-= iehdr
->e_phnum
* iehdr
->e_phentsize
;
5435 /* iehdr->e_phnum is just an estimate of the number
5436 of program headers that we will need. Make a note
5437 here of the number we used and the segment we chose
5438 to hold these headers, so that we can adjust the
5439 offset when we know the correct value. */
5440 phdr_adjust_num
= iehdr
->e_phnum
;
5441 phdr_adjust_seg
= map
;
5445 /* Step Three: Loop over the sections again, this time assigning
5446 those that fit to the current segment and removing them from the
5447 sections array; but making sure not to leave large gaps. Once all
5448 possible sections have been assigned to the current segment it is
5449 added to the list of built segments and if sections still remain
5450 to be assigned, a new segment is constructed before repeating
5458 /* Fill the current segment with sections that fit. */
5459 for (j
= 0; j
< section_count
; j
++)
5461 section
= sections
[j
];
5463 if (section
== NULL
)
5466 output_section
= section
->output_section
;
5468 BFD_ASSERT (output_section
!= NULL
);
5470 if (IS_CONTAINED_BY_LMA (output_section
, segment
, map
->p_paddr
)
5471 || IS_COREFILE_NOTE (segment
, section
))
5473 if (map
->count
== 0)
5475 /* If the first section in a segment does not start at
5476 the beginning of the segment, then something is
5478 if (output_section
->lma
!=
5480 + (map
->includes_filehdr
? iehdr
->e_ehsize
: 0)
5481 + (map
->includes_phdrs
5482 ? iehdr
->e_phnum
* iehdr
->e_phentsize
5488 asection
* prev_sec
;
5490 prev_sec
= map
->sections
[map
->count
- 1];
5492 /* If the gap between the end of the previous section
5493 and the start of this section is more than
5494 maxpagesize then we need to start a new segment. */
5495 if ((BFD_ALIGN (prev_sec
->lma
+ prev_sec
->size
,
5497 < BFD_ALIGN (output_section
->lma
, maxpagesize
))
5498 || ((prev_sec
->lma
+ prev_sec
->size
)
5499 > output_section
->lma
))
5501 if (suggested_lma
== 0)
5502 suggested_lma
= output_section
->lma
;
5508 map
->sections
[map
->count
++] = output_section
;
5511 section
->segment_mark
= TRUE
;
5513 else if (suggested_lma
== 0)
5514 suggested_lma
= output_section
->lma
;
5517 BFD_ASSERT (map
->count
> 0);
5519 /* Add the current segment to the list of built segments. */
5520 *pointer_to_map
= map
;
5521 pointer_to_map
= &map
->next
;
5523 if (isec
< section_count
)
5525 /* We still have not allocated all of the sections to
5526 segments. Create a new segment here, initialise it
5527 and carry on looping. */
5528 amt
= sizeof (struct elf_segment_map
);
5529 amt
+= ((bfd_size_type
) section_count
- 1) * sizeof (asection
*);
5530 map
= bfd_alloc (obfd
, amt
);
5537 /* Initialise the fields of the segment map. Set the physical
5538 physical address to the LMA of the first section that has
5539 not yet been assigned. */
5541 map
->p_type
= segment
->p_type
;
5542 map
->p_flags
= segment
->p_flags
;
5543 map
->p_flags_valid
= 1;
5544 map
->p_paddr
= suggested_lma
;
5545 map
->p_paddr_valid
= 1;
5546 map
->includes_filehdr
= 0;
5547 map
->includes_phdrs
= 0;
5550 while (isec
< section_count
);
5555 /* The Solaris linker creates program headers in which all the
5556 p_paddr fields are zero. When we try to objcopy or strip such a
5557 file, we get confused. Check for this case, and if we find it
5558 reset the p_paddr_valid fields. */
5559 for (map
= map_first
; map
!= NULL
; map
= map
->next
)
5560 if (map
->p_paddr
!= 0)
5563 for (map
= map_first
; map
!= NULL
; map
= map
->next
)
5564 map
->p_paddr_valid
= 0;
5566 elf_tdata (obfd
)->segment_map
= map_first
;
5568 /* If we had to estimate the number of program headers that were
5569 going to be needed, then check our estimate now and adjust
5570 the offset if necessary. */
5571 if (phdr_adjust_seg
!= NULL
)
5575 for (count
= 0, map
= map_first
; map
!= NULL
; map
= map
->next
)
5578 if (count
> phdr_adjust_num
)
5579 phdr_adjust_seg
->p_paddr
5580 -= (count
- phdr_adjust_num
) * iehdr
->e_phentsize
;
5585 #undef IS_CONTAINED_BY_VMA
5586 #undef IS_CONTAINED_BY_LMA
5587 #undef IS_COREFILE_NOTE
5588 #undef IS_SOLARIS_PT_INTERP
5589 #undef IS_SECTION_IN_INPUT_SEGMENT
5590 #undef INCLUDE_SECTION_IN_SEGMENT
5591 #undef SEGMENT_AFTER_SEGMENT
5592 #undef SEGMENT_OVERLAPS
5596 /* Copy ELF program header information. */
5599 copy_elf_program_header (bfd
*ibfd
, bfd
*obfd
)
5601 Elf_Internal_Ehdr
*iehdr
;
5602 struct elf_segment_map
*map
;
5603 struct elf_segment_map
*map_first
;
5604 struct elf_segment_map
**pointer_to_map
;
5605 Elf_Internal_Phdr
*segment
;
5607 unsigned int num_segments
;
5608 bfd_boolean phdr_included
= FALSE
;
5610 iehdr
= elf_elfheader (ibfd
);
5613 pointer_to_map
= &map_first
;
5615 num_segments
= elf_elfheader (ibfd
)->e_phnum
;
5616 for (i
= 0, segment
= elf_tdata (ibfd
)->phdr
;
5621 unsigned int section_count
;
5623 Elf_Internal_Shdr
*this_hdr
;
5624 asection
*first_section
= NULL
;
5625 asection
*lowest_section
= NULL
;
5627 /* FIXME: Do we need to copy PT_NULL segment? */
5628 if (segment
->p_type
== PT_NULL
)
5631 /* Compute how many sections are in this segment. */
5632 for (section
= ibfd
->sections
, section_count
= 0;
5634 section
= section
->next
)
5636 this_hdr
= &(elf_section_data(section
)->this_hdr
);
5637 if (ELF_IS_SECTION_IN_SEGMENT_FILE (this_hdr
, segment
))
5640 first_section
= lowest_section
= section
;
5641 if (section
->lma
< lowest_section
->lma
)
5642 lowest_section
= section
;
5647 /* Allocate a segment map big enough to contain
5648 all of the sections we have selected. */
5649 amt
= sizeof (struct elf_segment_map
);
5650 if (section_count
!= 0)
5651 amt
+= ((bfd_size_type
) section_count
- 1) * sizeof (asection
*);
5652 map
= bfd_zalloc (obfd
, amt
);
5656 /* Initialize the fields of the output segment map with the
5659 map
->p_type
= segment
->p_type
;
5660 map
->p_flags
= segment
->p_flags
;
5661 map
->p_flags_valid
= 1;
5662 map
->p_paddr
= segment
->p_paddr
;
5663 map
->p_paddr_valid
= 1;
5664 map
->p_align
= segment
->p_align
;
5665 map
->p_align_valid
= 1;
5666 map
->p_vaddr_offset
= 0;
5668 /* Determine if this segment contains the ELF file header
5669 and if it contains the program headers themselves. */
5670 map
->includes_filehdr
= (segment
->p_offset
== 0
5671 && segment
->p_filesz
>= iehdr
->e_ehsize
);
5673 map
->includes_phdrs
= 0;
5674 if (! phdr_included
|| segment
->p_type
!= PT_LOAD
)
5676 map
->includes_phdrs
=
5677 (segment
->p_offset
<= (bfd_vma
) iehdr
->e_phoff
5678 && (segment
->p_offset
+ segment
->p_filesz
5679 >= ((bfd_vma
) iehdr
->e_phoff
5680 + iehdr
->e_phnum
* iehdr
->e_phentsize
)));
5682 if (segment
->p_type
== PT_LOAD
&& map
->includes_phdrs
)
5683 phdr_included
= TRUE
;
5686 if (!map
->includes_phdrs
&& !map
->includes_filehdr
)
5687 /* There is some other padding before the first section. */
5688 map
->p_vaddr_offset
= ((lowest_section
? lowest_section
->lma
: 0)
5689 - segment
->p_paddr
);
5691 if (section_count
!= 0)
5693 unsigned int isec
= 0;
5695 for (section
= first_section
;
5697 section
= section
->next
)
5699 this_hdr
= &(elf_section_data(section
)->this_hdr
);
5700 if (ELF_IS_SECTION_IN_SEGMENT_FILE (this_hdr
, segment
))
5702 map
->sections
[isec
++] = section
->output_section
;
5703 if (isec
== section_count
)
5709 map
->count
= section_count
;
5710 *pointer_to_map
= map
;
5711 pointer_to_map
= &map
->next
;
5714 elf_tdata (obfd
)->segment_map
= map_first
;
5718 /* Copy private BFD data. This copies or rewrites ELF program header
5722 copy_private_bfd_data (bfd
*ibfd
, bfd
*obfd
)
5724 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
5725 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
5728 if (elf_tdata (ibfd
)->phdr
== NULL
)
5731 if (ibfd
->xvec
== obfd
->xvec
)
5733 /* Check to see if any sections in the input BFD
5734 covered by ELF program header have changed. */
5735 Elf_Internal_Phdr
*segment
;
5736 asection
*section
, *osec
;
5737 unsigned int i
, num_segments
;
5738 Elf_Internal_Shdr
*this_hdr
;
5740 /* Initialize the segment mark field. */
5741 for (section
= obfd
->sections
; section
!= NULL
;
5742 section
= section
->next
)
5743 section
->segment_mark
= FALSE
;
5745 num_segments
= elf_elfheader (ibfd
)->e_phnum
;
5746 for (i
= 0, segment
= elf_tdata (ibfd
)->phdr
;
5750 /* PR binutils/3535. The Solaris linker always sets the p_paddr
5751 and p_memsz fields of special segments (DYNAMIC, INTERP) to 0
5752 which severly confuses things, so always regenerate the segment
5753 map in this case. */
5754 if (segment
->p_paddr
== 0
5755 && segment
->p_memsz
== 0
5756 && (segment
->p_type
== PT_INTERP
|| segment
->p_type
== PT_DYNAMIC
))
5759 for (section
= ibfd
->sections
;
5760 section
!= NULL
; section
= section
->next
)
5762 /* We mark the output section so that we know it comes
5763 from the input BFD. */
5764 osec
= section
->output_section
;
5766 osec
->segment_mark
= TRUE
;
5768 /* Check if this section is covered by the segment. */
5769 this_hdr
= &(elf_section_data(section
)->this_hdr
);
5770 if (ELF_IS_SECTION_IN_SEGMENT_FILE (this_hdr
, segment
))
5772 /* FIXME: Check if its output section is changed or
5773 removed. What else do we need to check? */
5775 || section
->flags
!= osec
->flags
5776 || section
->lma
!= osec
->lma
5777 || section
->vma
!= osec
->vma
5778 || section
->size
!= osec
->size
5779 || section
->rawsize
!= osec
->rawsize
5780 || section
->alignment_power
!= osec
->alignment_power
)
5786 /* Check to see if any output section do not come from the
5788 for (section
= obfd
->sections
; section
!= NULL
;
5789 section
= section
->next
)
5791 if (section
->segment_mark
== FALSE
)
5794 section
->segment_mark
= FALSE
;
5797 return copy_elf_program_header (ibfd
, obfd
);
5801 return rewrite_elf_program_header (ibfd
, obfd
);
5804 /* Initialize private output section information from input section. */
5807 _bfd_elf_init_private_section_data (bfd
*ibfd
,
5811 struct bfd_link_info
*link_info
)
5814 Elf_Internal_Shdr
*ihdr
, *ohdr
;
5815 bfd_boolean need_group
= link_info
== NULL
|| link_info
->relocatable
;
5817 if (ibfd
->xvec
->flavour
!= bfd_target_elf_flavour
5818 || obfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
5821 /* Don't copy the output ELF section type from input if the
5822 output BFD section flags have been set to something different.
5823 elf_fake_sections will set ELF section type based on BFD
5825 if (elf_section_type (osec
) == SHT_NULL
5826 && (osec
->flags
== isec
->flags
|| !osec
->flags
))
5827 elf_section_type (osec
) = elf_section_type (isec
);
5829 /* FIXME: Is this correct for all OS/PROC specific flags? */
5830 elf_section_flags (osec
) |= (elf_section_flags (isec
)
5831 & (SHF_MASKOS
| SHF_MASKPROC
));
5833 /* Set things up for objcopy and relocatable link. The output
5834 SHT_GROUP section will have its elf_next_in_group pointing back
5835 to the input group members. Ignore linker created group section.
5836 See elfNN_ia64_object_p in elfxx-ia64.c. */
5839 if (elf_sec_group (isec
) == NULL
5840 || (elf_sec_group (isec
)->flags
& SEC_LINKER_CREATED
) == 0)
5842 if (elf_section_flags (isec
) & SHF_GROUP
)
5843 elf_section_flags (osec
) |= SHF_GROUP
;
5844 elf_next_in_group (osec
) = elf_next_in_group (isec
);
5845 elf_group_name (osec
) = elf_group_name (isec
);
5849 ihdr
= &elf_section_data (isec
)->this_hdr
;
5851 /* We need to handle elf_linked_to_section for SHF_LINK_ORDER. We
5852 don't use the output section of the linked-to section since it
5853 may be NULL at this point. */
5854 if ((ihdr
->sh_flags
& SHF_LINK_ORDER
) != 0)
5856 ohdr
= &elf_section_data (osec
)->this_hdr
;
5857 ohdr
->sh_flags
|= SHF_LINK_ORDER
;
5858 elf_linked_to_section (osec
) = elf_linked_to_section (isec
);
5861 osec
->use_rela_p
= isec
->use_rela_p
;
5866 /* Copy private section information. This copies over the entsize
5867 field, and sometimes the info field. */
5870 _bfd_elf_copy_private_section_data (bfd
*ibfd
,
5875 Elf_Internal_Shdr
*ihdr
, *ohdr
;
5877 if (ibfd
->xvec
->flavour
!= bfd_target_elf_flavour
5878 || obfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
5881 ihdr
= &elf_section_data (isec
)->this_hdr
;
5882 ohdr
= &elf_section_data (osec
)->this_hdr
;
5884 ohdr
->sh_entsize
= ihdr
->sh_entsize
;
5886 if (ihdr
->sh_type
== SHT_SYMTAB
5887 || ihdr
->sh_type
== SHT_DYNSYM
5888 || ihdr
->sh_type
== SHT_GNU_verneed
5889 || ihdr
->sh_type
== SHT_GNU_verdef
)
5890 ohdr
->sh_info
= ihdr
->sh_info
;
5892 return _bfd_elf_init_private_section_data (ibfd
, isec
, obfd
, osec
,
5896 /* Copy private header information. */
5899 _bfd_elf_copy_private_header_data (bfd
*ibfd
, bfd
*obfd
)
5903 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
5904 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
5907 /* Copy over private BFD data if it has not already been copied.
5908 This must be done here, rather than in the copy_private_bfd_data
5909 entry point, because the latter is called after the section
5910 contents have been set, which means that the program headers have
5911 already been worked out. */
5912 if (elf_tdata (obfd
)->segment_map
== NULL
&& elf_tdata (ibfd
)->phdr
!= NULL
)
5914 if (! copy_private_bfd_data (ibfd
, obfd
))
5918 /* _bfd_elf_copy_private_section_data copied over the SHF_GROUP flag
5919 but this might be wrong if we deleted the group section. */
5920 for (isec
= ibfd
->sections
; isec
!= NULL
; isec
= isec
->next
)
5921 if (elf_section_type (isec
) == SHT_GROUP
5922 && isec
->output_section
== NULL
)
5924 asection
*first
= elf_next_in_group (isec
);
5925 asection
*s
= first
;
5928 if (s
->output_section
!= NULL
)
5930 elf_section_flags (s
->output_section
) &= ~SHF_GROUP
;
5931 elf_group_name (s
->output_section
) = NULL
;
5933 s
= elf_next_in_group (s
);
5942 /* Copy private symbol information. If this symbol is in a section
5943 which we did not map into a BFD section, try to map the section
5944 index correctly. We use special macro definitions for the mapped
5945 section indices; these definitions are interpreted by the
5946 swap_out_syms function. */
5948 #define MAP_ONESYMTAB (SHN_HIOS + 1)
5949 #define MAP_DYNSYMTAB (SHN_HIOS + 2)
5950 #define MAP_STRTAB (SHN_HIOS + 3)
5951 #define MAP_SHSTRTAB (SHN_HIOS + 4)
5952 #define MAP_SYM_SHNDX (SHN_HIOS + 5)
5955 _bfd_elf_copy_private_symbol_data (bfd
*ibfd
,
5960 elf_symbol_type
*isym
, *osym
;
5962 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
5963 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
5966 isym
= elf_symbol_from (ibfd
, isymarg
);
5967 osym
= elf_symbol_from (obfd
, osymarg
);
5971 && bfd_is_abs_section (isym
->symbol
.section
))
5975 shndx
= isym
->internal_elf_sym
.st_shndx
;
5976 if (shndx
== elf_onesymtab (ibfd
))
5977 shndx
= MAP_ONESYMTAB
;
5978 else if (shndx
== elf_dynsymtab (ibfd
))
5979 shndx
= MAP_DYNSYMTAB
;
5980 else if (shndx
== elf_tdata (ibfd
)->strtab_section
)
5982 else if (shndx
== elf_tdata (ibfd
)->shstrtab_section
)
5983 shndx
= MAP_SHSTRTAB
;
5984 else if (shndx
== elf_tdata (ibfd
)->symtab_shndx_section
)
5985 shndx
= MAP_SYM_SHNDX
;
5986 osym
->internal_elf_sym
.st_shndx
= shndx
;
5992 /* Swap out the symbols. */
5995 swap_out_syms (bfd
*abfd
,
5996 struct bfd_strtab_hash
**sttp
,
5999 const struct elf_backend_data
*bed
;
6002 struct bfd_strtab_hash
*stt
;
6003 Elf_Internal_Shdr
*symtab_hdr
;
6004 Elf_Internal_Shdr
*symtab_shndx_hdr
;
6005 Elf_Internal_Shdr
*symstrtab_hdr
;
6006 bfd_byte
*outbound_syms
;
6007 bfd_byte
*outbound_shndx
;
6010 bfd_boolean name_local_sections
;
6012 if (!elf_map_symbols (abfd
))
6015 /* Dump out the symtabs. */
6016 stt
= _bfd_elf_stringtab_init ();
6020 bed
= get_elf_backend_data (abfd
);
6021 symcount
= bfd_get_symcount (abfd
);
6022 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
6023 symtab_hdr
->sh_type
= SHT_SYMTAB
;
6024 symtab_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
6025 symtab_hdr
->sh_size
= symtab_hdr
->sh_entsize
* (symcount
+ 1);
6026 symtab_hdr
->sh_info
= elf_num_locals (abfd
) + 1;
6027 symtab_hdr
->sh_addralign
= 1 << bed
->s
->log_file_align
;
6029 symstrtab_hdr
= &elf_tdata (abfd
)->strtab_hdr
;
6030 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
6032 outbound_syms
= bfd_alloc2 (abfd
, 1 + symcount
, bed
->s
->sizeof_sym
);
6033 if (outbound_syms
== NULL
)
6035 _bfd_stringtab_free (stt
);
6038 symtab_hdr
->contents
= outbound_syms
;
6040 outbound_shndx
= NULL
;
6041 symtab_shndx_hdr
= &elf_tdata (abfd
)->symtab_shndx_hdr
;
6042 if (symtab_shndx_hdr
->sh_name
!= 0)
6044 amt
= (bfd_size_type
) (1 + symcount
) * sizeof (Elf_External_Sym_Shndx
);
6045 outbound_shndx
= bfd_zalloc2 (abfd
, 1 + symcount
,
6046 sizeof (Elf_External_Sym_Shndx
));
6047 if (outbound_shndx
== NULL
)
6049 _bfd_stringtab_free (stt
);
6053 symtab_shndx_hdr
->contents
= outbound_shndx
;
6054 symtab_shndx_hdr
->sh_type
= SHT_SYMTAB_SHNDX
;
6055 symtab_shndx_hdr
->sh_size
= amt
;
6056 symtab_shndx_hdr
->sh_addralign
= sizeof (Elf_External_Sym_Shndx
);
6057 symtab_shndx_hdr
->sh_entsize
= sizeof (Elf_External_Sym_Shndx
);
6060 /* Now generate the data (for "contents"). */
6062 /* Fill in zeroth symbol and swap it out. */
6063 Elf_Internal_Sym sym
;
6069 sym
.st_shndx
= SHN_UNDEF
;
6070 bed
->s
->swap_symbol_out (abfd
, &sym
, outbound_syms
, outbound_shndx
);
6071 outbound_syms
+= bed
->s
->sizeof_sym
;
6072 if (outbound_shndx
!= NULL
)
6073 outbound_shndx
+= sizeof (Elf_External_Sym_Shndx
);
6077 = (bed
->elf_backend_name_local_section_symbols
6078 && bed
->elf_backend_name_local_section_symbols (abfd
));
6080 syms
= bfd_get_outsymbols (abfd
);
6081 for (idx
= 0; idx
< symcount
; idx
++)
6083 Elf_Internal_Sym sym
;
6084 bfd_vma value
= syms
[idx
]->value
;
6085 elf_symbol_type
*type_ptr
;
6086 flagword flags
= syms
[idx
]->flags
;
6089 if (!name_local_sections
6090 && (flags
& (BSF_SECTION_SYM
| BSF_GLOBAL
)) == BSF_SECTION_SYM
)
6092 /* Local section symbols have no name. */
6097 sym
.st_name
= (unsigned long) _bfd_stringtab_add (stt
,
6100 if (sym
.st_name
== (unsigned long) -1)
6102 _bfd_stringtab_free (stt
);
6107 type_ptr
= elf_symbol_from (abfd
, syms
[idx
]);
6109 if ((flags
& BSF_SECTION_SYM
) == 0
6110 && bfd_is_com_section (syms
[idx
]->section
))
6112 /* ELF common symbols put the alignment into the `value' field,
6113 and the size into the `size' field. This is backwards from
6114 how BFD handles it, so reverse it here. */
6115 sym
.st_size
= value
;
6116 if (type_ptr
== NULL
6117 || type_ptr
->internal_elf_sym
.st_value
== 0)
6118 sym
.st_value
= value
>= 16 ? 16 : (1 << bfd_log2 (value
));
6120 sym
.st_value
= type_ptr
->internal_elf_sym
.st_value
;
6121 sym
.st_shndx
= _bfd_elf_section_from_bfd_section
6122 (abfd
, syms
[idx
]->section
);
6126 asection
*sec
= syms
[idx
]->section
;
6129 if (sec
->output_section
)
6131 value
+= sec
->output_offset
;
6132 sec
= sec
->output_section
;
6135 /* Don't add in the section vma for relocatable output. */
6136 if (! relocatable_p
)
6138 sym
.st_value
= value
;
6139 sym
.st_size
= type_ptr
? type_ptr
->internal_elf_sym
.st_size
: 0;
6141 if (bfd_is_abs_section (sec
)
6143 && type_ptr
->internal_elf_sym
.st_shndx
!= 0)
6145 /* This symbol is in a real ELF section which we did
6146 not create as a BFD section. Undo the mapping done
6147 by copy_private_symbol_data. */
6148 shndx
= type_ptr
->internal_elf_sym
.st_shndx
;
6152 shndx
= elf_onesymtab (abfd
);
6155 shndx
= elf_dynsymtab (abfd
);
6158 shndx
= elf_tdata (abfd
)->strtab_section
;
6161 shndx
= elf_tdata (abfd
)->shstrtab_section
;
6164 shndx
= elf_tdata (abfd
)->symtab_shndx_section
;
6172 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec
);
6178 /* Writing this would be a hell of a lot easier if
6179 we had some decent documentation on bfd, and
6180 knew what to expect of the library, and what to
6181 demand of applications. For example, it
6182 appears that `objcopy' might not set the
6183 section of a symbol to be a section that is
6184 actually in the output file. */
6185 sec2
= bfd_get_section_by_name (abfd
, sec
->name
);
6188 _bfd_error_handler (_("\
6189 Unable to find equivalent output section for symbol '%s' from section '%s'"),
6190 syms
[idx
]->name
? syms
[idx
]->name
: "<Local sym>",
6192 bfd_set_error (bfd_error_invalid_operation
);
6193 _bfd_stringtab_free (stt
);
6197 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec2
);
6198 BFD_ASSERT (shndx
!= -1);
6202 sym
.st_shndx
= shndx
;
6205 if ((flags
& BSF_THREAD_LOCAL
) != 0)
6207 else if ((flags
& BSF_FUNCTION
) != 0)
6209 else if ((flags
& BSF_OBJECT
) != 0)
6211 else if ((flags
& BSF_RELC
) != 0)
6213 else if ((flags
& BSF_SRELC
) != 0)
6218 if (syms
[idx
]->section
->flags
& SEC_THREAD_LOCAL
)
6221 /* Processor-specific types. */
6222 if (type_ptr
!= NULL
6223 && bed
->elf_backend_get_symbol_type
)
6224 type
= ((*bed
->elf_backend_get_symbol_type
)
6225 (&type_ptr
->internal_elf_sym
, type
));
6227 if (flags
& BSF_SECTION_SYM
)
6229 if (flags
& BSF_GLOBAL
)
6230 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, STT_SECTION
);
6232 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_SECTION
);
6234 else if (bfd_is_com_section (syms
[idx
]->section
))
6235 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, type
);
6236 else if (bfd_is_und_section (syms
[idx
]->section
))
6237 sym
.st_info
= ELF_ST_INFO (((flags
& BSF_WEAK
)
6241 else if (flags
& BSF_FILE
)
6242 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FILE
);
6245 int bind
= STB_LOCAL
;
6247 if (flags
& BSF_LOCAL
)
6249 else if (flags
& BSF_WEAK
)
6251 else if (flags
& BSF_GLOBAL
)
6254 sym
.st_info
= ELF_ST_INFO (bind
, type
);
6257 if (type_ptr
!= NULL
)
6258 sym
.st_other
= type_ptr
->internal_elf_sym
.st_other
;
6262 bed
->s
->swap_symbol_out (abfd
, &sym
, outbound_syms
, outbound_shndx
);
6263 outbound_syms
+= bed
->s
->sizeof_sym
;
6264 if (outbound_shndx
!= NULL
)
6265 outbound_shndx
+= sizeof (Elf_External_Sym_Shndx
);
6269 symstrtab_hdr
->sh_size
= _bfd_stringtab_size (stt
);
6270 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
6272 symstrtab_hdr
->sh_flags
= 0;
6273 symstrtab_hdr
->sh_addr
= 0;
6274 symstrtab_hdr
->sh_entsize
= 0;
6275 symstrtab_hdr
->sh_link
= 0;
6276 symstrtab_hdr
->sh_info
= 0;
6277 symstrtab_hdr
->sh_addralign
= 1;
6282 /* Return the number of bytes required to hold the symtab vector.
6284 Note that we base it on the count plus 1, since we will null terminate
6285 the vector allocated based on this size. However, the ELF symbol table
6286 always has a dummy entry as symbol #0, so it ends up even. */
6289 _bfd_elf_get_symtab_upper_bound (bfd
*abfd
)
6293 Elf_Internal_Shdr
*hdr
= &elf_tdata (abfd
)->symtab_hdr
;
6295 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
6296 symtab_size
= (symcount
+ 1) * (sizeof (asymbol
*));
6298 symtab_size
-= sizeof (asymbol
*);
6304 _bfd_elf_get_dynamic_symtab_upper_bound (bfd
*abfd
)
6308 Elf_Internal_Shdr
*hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
6310 if (elf_dynsymtab (abfd
) == 0)
6312 bfd_set_error (bfd_error_invalid_operation
);
6316 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
6317 symtab_size
= (symcount
+ 1) * (sizeof (asymbol
*));
6319 symtab_size
-= sizeof (asymbol
*);
6325 _bfd_elf_get_reloc_upper_bound (bfd
*abfd ATTRIBUTE_UNUSED
,
6328 return (asect
->reloc_count
+ 1) * sizeof (arelent
*);
6331 /* Canonicalize the relocs. */
6334 _bfd_elf_canonicalize_reloc (bfd
*abfd
,
6341 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
6343 if (! bed
->s
->slurp_reloc_table (abfd
, section
, symbols
, FALSE
))
6346 tblptr
= section
->relocation
;
6347 for (i
= 0; i
< section
->reloc_count
; i
++)
6348 *relptr
++ = tblptr
++;
6352 return section
->reloc_count
;
6356 _bfd_elf_canonicalize_symtab (bfd
*abfd
, asymbol
**allocation
)
6358 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
6359 long symcount
= bed
->s
->slurp_symbol_table (abfd
, allocation
, FALSE
);
6362 bfd_get_symcount (abfd
) = symcount
;
6367 _bfd_elf_canonicalize_dynamic_symtab (bfd
*abfd
,
6368 asymbol
**allocation
)
6370 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
6371 long symcount
= bed
->s
->slurp_symbol_table (abfd
, allocation
, TRUE
);
6374 bfd_get_dynamic_symcount (abfd
) = symcount
;
6378 /* Return the size required for the dynamic reloc entries. Any loadable
6379 section that was actually installed in the BFD, and has type SHT_REL
6380 or SHT_RELA, and uses the dynamic symbol table, is considered to be a
6381 dynamic reloc section. */
6384 _bfd_elf_get_dynamic_reloc_upper_bound (bfd
*abfd
)
6389 if (elf_dynsymtab (abfd
) == 0)
6391 bfd_set_error (bfd_error_invalid_operation
);
6395 ret
= sizeof (arelent
*);
6396 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
6397 if ((s
->flags
& SEC_LOAD
) != 0
6398 && elf_section_data (s
)->this_hdr
.sh_link
== elf_dynsymtab (abfd
)
6399 && (elf_section_data (s
)->this_hdr
.sh_type
== SHT_REL
6400 || elf_section_data (s
)->this_hdr
.sh_type
== SHT_RELA
))
6401 ret
+= ((s
->size
/ elf_section_data (s
)->this_hdr
.sh_entsize
)
6402 * sizeof (arelent
*));
6407 /* Canonicalize the dynamic relocation entries. Note that we return the
6408 dynamic relocations as a single block, although they are actually
6409 associated with particular sections; the interface, which was
6410 designed for SunOS style shared libraries, expects that there is only
6411 one set of dynamic relocs. Any loadable section that was actually
6412 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses the
6413 dynamic symbol table, is considered to be a dynamic reloc section. */
6416 _bfd_elf_canonicalize_dynamic_reloc (bfd
*abfd
,
6420 bfd_boolean (*slurp_relocs
) (bfd
*, asection
*, asymbol
**, bfd_boolean
);
6424 if (elf_dynsymtab (abfd
) == 0)
6426 bfd_set_error (bfd_error_invalid_operation
);
6430 slurp_relocs
= get_elf_backend_data (abfd
)->s
->slurp_reloc_table
;
6432 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
6434 if ((s
->flags
& SEC_LOAD
) != 0
6435 && elf_section_data (s
)->this_hdr
.sh_link
== elf_dynsymtab (abfd
)
6436 && (elf_section_data (s
)->this_hdr
.sh_type
== SHT_REL
6437 || elf_section_data (s
)->this_hdr
.sh_type
== SHT_RELA
))
6442 if (! (*slurp_relocs
) (abfd
, s
, syms
, TRUE
))
6444 count
= s
->size
/ elf_section_data (s
)->this_hdr
.sh_entsize
;
6446 for (i
= 0; i
< count
; i
++)
6457 /* Read in the version information. */
6460 _bfd_elf_slurp_version_tables (bfd
*abfd
, bfd_boolean default_imported_symver
)
6462 bfd_byte
*contents
= NULL
;
6463 unsigned int freeidx
= 0;
6465 if (elf_dynverref (abfd
) != 0)
6467 Elf_Internal_Shdr
*hdr
;
6468 Elf_External_Verneed
*everneed
;
6469 Elf_Internal_Verneed
*iverneed
;
6471 bfd_byte
*contents_end
;
6473 hdr
= &elf_tdata (abfd
)->dynverref_hdr
;
6475 elf_tdata (abfd
)->verref
= bfd_zalloc2 (abfd
, hdr
->sh_info
,
6476 sizeof (Elf_Internal_Verneed
));
6477 if (elf_tdata (abfd
)->verref
== NULL
)
6480 elf_tdata (abfd
)->cverrefs
= hdr
->sh_info
;
6482 contents
= bfd_malloc (hdr
->sh_size
);
6483 if (contents
== NULL
)
6485 error_return_verref
:
6486 elf_tdata (abfd
)->verref
= NULL
;
6487 elf_tdata (abfd
)->cverrefs
= 0;
6490 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
6491 || bfd_bread (contents
, hdr
->sh_size
, abfd
) != hdr
->sh_size
)
6492 goto error_return_verref
;
6494 if (hdr
->sh_info
&& hdr
->sh_size
< sizeof (Elf_External_Verneed
))
6495 goto error_return_verref
;
6497 BFD_ASSERT (sizeof (Elf_External_Verneed
)
6498 == sizeof (Elf_External_Vernaux
));
6499 contents_end
= contents
+ hdr
->sh_size
- sizeof (Elf_External_Verneed
);
6500 everneed
= (Elf_External_Verneed
*) contents
;
6501 iverneed
= elf_tdata (abfd
)->verref
;
6502 for (i
= 0; i
< hdr
->sh_info
; i
++, iverneed
++)
6504 Elf_External_Vernaux
*evernaux
;
6505 Elf_Internal_Vernaux
*ivernaux
;
6508 _bfd_elf_swap_verneed_in (abfd
, everneed
, iverneed
);
6510 iverneed
->vn_bfd
= abfd
;
6512 iverneed
->vn_filename
=
6513 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
6515 if (iverneed
->vn_filename
== NULL
)
6516 goto error_return_verref
;
6518 if (iverneed
->vn_cnt
== 0)
6519 iverneed
->vn_auxptr
= NULL
;
6522 iverneed
->vn_auxptr
= bfd_alloc2 (abfd
, iverneed
->vn_cnt
,
6523 sizeof (Elf_Internal_Vernaux
));
6524 if (iverneed
->vn_auxptr
== NULL
)
6525 goto error_return_verref
;
6528 if (iverneed
->vn_aux
6529 > (size_t) (contents_end
- (bfd_byte
*) everneed
))
6530 goto error_return_verref
;
6532 evernaux
= ((Elf_External_Vernaux
*)
6533 ((bfd_byte
*) everneed
+ iverneed
->vn_aux
));
6534 ivernaux
= iverneed
->vn_auxptr
;
6535 for (j
= 0; j
< iverneed
->vn_cnt
; j
++, ivernaux
++)
6537 _bfd_elf_swap_vernaux_in (abfd
, evernaux
, ivernaux
);
6539 ivernaux
->vna_nodename
=
6540 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
6541 ivernaux
->vna_name
);
6542 if (ivernaux
->vna_nodename
== NULL
)
6543 goto error_return_verref
;
6545 if (j
+ 1 < iverneed
->vn_cnt
)
6546 ivernaux
->vna_nextptr
= ivernaux
+ 1;
6548 ivernaux
->vna_nextptr
= NULL
;
6550 if (ivernaux
->vna_next
6551 > (size_t) (contents_end
- (bfd_byte
*) evernaux
))
6552 goto error_return_verref
;
6554 evernaux
= ((Elf_External_Vernaux
*)
6555 ((bfd_byte
*) evernaux
+ ivernaux
->vna_next
));
6557 if (ivernaux
->vna_other
> freeidx
)
6558 freeidx
= ivernaux
->vna_other
;
6561 if (i
+ 1 < hdr
->sh_info
)
6562 iverneed
->vn_nextref
= iverneed
+ 1;
6564 iverneed
->vn_nextref
= NULL
;
6566 if (iverneed
->vn_next
6567 > (size_t) (contents_end
- (bfd_byte
*) everneed
))
6568 goto error_return_verref
;
6570 everneed
= ((Elf_External_Verneed
*)
6571 ((bfd_byte
*) everneed
+ iverneed
->vn_next
));
6578 if (elf_dynverdef (abfd
) != 0)
6580 Elf_Internal_Shdr
*hdr
;
6581 Elf_External_Verdef
*everdef
;
6582 Elf_Internal_Verdef
*iverdef
;
6583 Elf_Internal_Verdef
*iverdefarr
;
6584 Elf_Internal_Verdef iverdefmem
;
6586 unsigned int maxidx
;
6587 bfd_byte
*contents_end_def
, *contents_end_aux
;
6589 hdr
= &elf_tdata (abfd
)->dynverdef_hdr
;
6591 contents
= bfd_malloc (hdr
->sh_size
);
6592 if (contents
== NULL
)
6594 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
6595 || bfd_bread (contents
, hdr
->sh_size
, abfd
) != hdr
->sh_size
)
6598 if (hdr
->sh_info
&& hdr
->sh_size
< sizeof (Elf_External_Verdef
))
6601 BFD_ASSERT (sizeof (Elf_External_Verdef
)
6602 >= sizeof (Elf_External_Verdaux
));
6603 contents_end_def
= contents
+ hdr
->sh_size
6604 - sizeof (Elf_External_Verdef
);
6605 contents_end_aux
= contents
+ hdr
->sh_size
6606 - sizeof (Elf_External_Verdaux
);
6608 /* We know the number of entries in the section but not the maximum
6609 index. Therefore we have to run through all entries and find
6611 everdef
= (Elf_External_Verdef
*) contents
;
6613 for (i
= 0; i
< hdr
->sh_info
; ++i
)
6615 _bfd_elf_swap_verdef_in (abfd
, everdef
, &iverdefmem
);
6617 if ((iverdefmem
.vd_ndx
& ((unsigned) VERSYM_VERSION
)) > maxidx
)
6618 maxidx
= iverdefmem
.vd_ndx
& ((unsigned) VERSYM_VERSION
);
6620 if (iverdefmem
.vd_next
6621 > (size_t) (contents_end_def
- (bfd_byte
*) everdef
))
6624 everdef
= ((Elf_External_Verdef
*)
6625 ((bfd_byte
*) everdef
+ iverdefmem
.vd_next
));
6628 if (default_imported_symver
)
6630 if (freeidx
> maxidx
)
6635 elf_tdata (abfd
)->verdef
= bfd_zalloc2 (abfd
, maxidx
,
6636 sizeof (Elf_Internal_Verdef
));
6637 if (elf_tdata (abfd
)->verdef
== NULL
)
6640 elf_tdata (abfd
)->cverdefs
= maxidx
;
6642 everdef
= (Elf_External_Verdef
*) contents
;
6643 iverdefarr
= elf_tdata (abfd
)->verdef
;
6644 for (i
= 0; i
< hdr
->sh_info
; i
++)
6646 Elf_External_Verdaux
*everdaux
;
6647 Elf_Internal_Verdaux
*iverdaux
;
6650 _bfd_elf_swap_verdef_in (abfd
, everdef
, &iverdefmem
);
6652 if ((iverdefmem
.vd_ndx
& VERSYM_VERSION
) == 0)
6654 error_return_verdef
:
6655 elf_tdata (abfd
)->verdef
= NULL
;
6656 elf_tdata (abfd
)->cverdefs
= 0;
6660 iverdef
= &iverdefarr
[(iverdefmem
.vd_ndx
& VERSYM_VERSION
) - 1];
6661 memcpy (iverdef
, &iverdefmem
, sizeof (Elf_Internal_Verdef
));
6663 iverdef
->vd_bfd
= abfd
;
6665 if (iverdef
->vd_cnt
== 0)
6666 iverdef
->vd_auxptr
= NULL
;
6669 iverdef
->vd_auxptr
= bfd_alloc2 (abfd
, iverdef
->vd_cnt
,
6670 sizeof (Elf_Internal_Verdaux
));
6671 if (iverdef
->vd_auxptr
== NULL
)
6672 goto error_return_verdef
;
6676 > (size_t) (contents_end_aux
- (bfd_byte
*) everdef
))
6677 goto error_return_verdef
;
6679 everdaux
= ((Elf_External_Verdaux
*)
6680 ((bfd_byte
*) everdef
+ iverdef
->vd_aux
));
6681 iverdaux
= iverdef
->vd_auxptr
;
6682 for (j
= 0; j
< iverdef
->vd_cnt
; j
++, iverdaux
++)
6684 _bfd_elf_swap_verdaux_in (abfd
, everdaux
, iverdaux
);
6686 iverdaux
->vda_nodename
=
6687 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
6688 iverdaux
->vda_name
);
6689 if (iverdaux
->vda_nodename
== NULL
)
6690 goto error_return_verdef
;
6692 if (j
+ 1 < iverdef
->vd_cnt
)
6693 iverdaux
->vda_nextptr
= iverdaux
+ 1;
6695 iverdaux
->vda_nextptr
= NULL
;
6697 if (iverdaux
->vda_next
6698 > (size_t) (contents_end_aux
- (bfd_byte
*) everdaux
))
6699 goto error_return_verdef
;
6701 everdaux
= ((Elf_External_Verdaux
*)
6702 ((bfd_byte
*) everdaux
+ iverdaux
->vda_next
));
6705 if (iverdef
->vd_cnt
)
6706 iverdef
->vd_nodename
= iverdef
->vd_auxptr
->vda_nodename
;
6708 if ((size_t) (iverdef
- iverdefarr
) + 1 < maxidx
)
6709 iverdef
->vd_nextdef
= iverdef
+ 1;
6711 iverdef
->vd_nextdef
= NULL
;
6713 everdef
= ((Elf_External_Verdef
*)
6714 ((bfd_byte
*) everdef
+ iverdef
->vd_next
));
6720 else if (default_imported_symver
)
6727 elf_tdata (abfd
)->verdef
= bfd_zalloc2 (abfd
, freeidx
,
6728 sizeof (Elf_Internal_Verdef
));
6729 if (elf_tdata (abfd
)->verdef
== NULL
)
6732 elf_tdata (abfd
)->cverdefs
= freeidx
;
6735 /* Create a default version based on the soname. */
6736 if (default_imported_symver
)
6738 Elf_Internal_Verdef
*iverdef
;
6739 Elf_Internal_Verdaux
*iverdaux
;
6741 iverdef
= &elf_tdata (abfd
)->verdef
[freeidx
- 1];;
6743 iverdef
->vd_version
= VER_DEF_CURRENT
;
6744 iverdef
->vd_flags
= 0;
6745 iverdef
->vd_ndx
= freeidx
;
6746 iverdef
->vd_cnt
= 1;
6748 iverdef
->vd_bfd
= abfd
;
6750 iverdef
->vd_nodename
= bfd_elf_get_dt_soname (abfd
);
6751 if (iverdef
->vd_nodename
== NULL
)
6752 goto error_return_verdef
;
6753 iverdef
->vd_nextdef
= NULL
;
6754 iverdef
->vd_auxptr
= bfd_alloc (abfd
, sizeof (Elf_Internal_Verdaux
));
6755 if (iverdef
->vd_auxptr
== NULL
)
6756 goto error_return_verdef
;
6758 iverdaux
= iverdef
->vd_auxptr
;
6759 iverdaux
->vda_nodename
= iverdef
->vd_nodename
;
6760 iverdaux
->vda_nextptr
= NULL
;
6766 if (contents
!= NULL
)
6772 _bfd_elf_make_empty_symbol (bfd
*abfd
)
6774 elf_symbol_type
*newsym
;
6775 bfd_size_type amt
= sizeof (elf_symbol_type
);
6777 newsym
= bfd_zalloc (abfd
, amt
);
6782 newsym
->symbol
.the_bfd
= abfd
;
6783 return &newsym
->symbol
;
6788 _bfd_elf_get_symbol_info (bfd
*abfd ATTRIBUTE_UNUSED
,
6792 bfd_symbol_info (symbol
, ret
);
6795 /* Return whether a symbol name implies a local symbol. Most targets
6796 use this function for the is_local_label_name entry point, but some
6800 _bfd_elf_is_local_label_name (bfd
*abfd ATTRIBUTE_UNUSED
,
6803 /* Normal local symbols start with ``.L''. */
6804 if (name
[0] == '.' && name
[1] == 'L')
6807 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
6808 DWARF debugging symbols starting with ``..''. */
6809 if (name
[0] == '.' && name
[1] == '.')
6812 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
6813 emitting DWARF debugging output. I suspect this is actually a
6814 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
6815 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
6816 underscore to be emitted on some ELF targets). For ease of use,
6817 we treat such symbols as local. */
6818 if (name
[0] == '_' && name
[1] == '.' && name
[2] == 'L' && name
[3] == '_')
6825 _bfd_elf_get_lineno (bfd
*abfd ATTRIBUTE_UNUSED
,
6826 asymbol
*symbol ATTRIBUTE_UNUSED
)
6833 _bfd_elf_set_arch_mach (bfd
*abfd
,
6834 enum bfd_architecture arch
,
6835 unsigned long machine
)
6837 /* If this isn't the right architecture for this backend, and this
6838 isn't the generic backend, fail. */
6839 if (arch
!= get_elf_backend_data (abfd
)->arch
6840 && arch
!= bfd_arch_unknown
6841 && get_elf_backend_data (abfd
)->arch
!= bfd_arch_unknown
)
6844 return bfd_default_set_arch_mach (abfd
, arch
, machine
);
6847 /* Find the function to a particular section and offset,
6848 for error reporting. */
6851 elf_find_function (bfd
*abfd ATTRIBUTE_UNUSED
,
6855 const char **filename_ptr
,
6856 const char **functionname_ptr
)
6858 const char *filename
;
6859 asymbol
*func
, *file
;
6862 /* ??? Given multiple file symbols, it is impossible to reliably
6863 choose the right file name for global symbols. File symbols are
6864 local symbols, and thus all file symbols must sort before any
6865 global symbols. The ELF spec may be interpreted to say that a
6866 file symbol must sort before other local symbols, but currently
6867 ld -r doesn't do this. So, for ld -r output, it is possible to
6868 make a better choice of file name for local symbols by ignoring
6869 file symbols appearing after a given local symbol. */
6870 enum { nothing_seen
, symbol_seen
, file_after_symbol_seen
} state
;
6876 state
= nothing_seen
;
6878 for (p
= symbols
; *p
!= NULL
; p
++)
6882 q
= (elf_symbol_type
*) *p
;
6884 switch (ELF_ST_TYPE (q
->internal_elf_sym
.st_info
))
6890 if (state
== symbol_seen
)
6891 state
= file_after_symbol_seen
;
6895 if (bfd_get_section (&q
->symbol
) == section
6896 && q
->symbol
.value
>= low_func
6897 && q
->symbol
.value
<= offset
)
6899 func
= (asymbol
*) q
;
6900 low_func
= q
->symbol
.value
;
6903 && (ELF_ST_BIND (q
->internal_elf_sym
.st_info
) == STB_LOCAL
6904 || state
!= file_after_symbol_seen
))
6905 filename
= bfd_asymbol_name (file
);
6909 if (state
== nothing_seen
)
6910 state
= symbol_seen
;
6917 *filename_ptr
= filename
;
6918 if (functionname_ptr
)
6919 *functionname_ptr
= bfd_asymbol_name (func
);
6924 /* Find the nearest line to a particular section and offset,
6925 for error reporting. */
6928 _bfd_elf_find_nearest_line (bfd
*abfd
,
6932 const char **filename_ptr
,
6933 const char **functionname_ptr
,
6934 unsigned int *line_ptr
)
6938 if (_bfd_dwarf1_find_nearest_line (abfd
, section
, symbols
, offset
,
6939 filename_ptr
, functionname_ptr
,
6942 if (!*functionname_ptr
)
6943 elf_find_function (abfd
, section
, symbols
, offset
,
6944 *filename_ptr
? NULL
: filename_ptr
,
6950 if (_bfd_dwarf2_find_nearest_line (abfd
, section
, symbols
, offset
,
6951 filename_ptr
, functionname_ptr
,
6953 &elf_tdata (abfd
)->dwarf2_find_line_info
))
6955 if (!*functionname_ptr
)
6956 elf_find_function (abfd
, section
, symbols
, offset
,
6957 *filename_ptr
? NULL
: filename_ptr
,
6963 if (! _bfd_stab_section_find_nearest_line (abfd
, symbols
, section
, offset
,
6964 &found
, filename_ptr
,
6965 functionname_ptr
, line_ptr
,
6966 &elf_tdata (abfd
)->line_info
))
6968 if (found
&& (*functionname_ptr
|| *line_ptr
))
6971 if (symbols
== NULL
)
6974 if (! elf_find_function (abfd
, section
, symbols
, offset
,
6975 filename_ptr
, functionname_ptr
))
6982 /* Find the line for a symbol. */
6985 _bfd_elf_find_line (bfd
*abfd
, asymbol
**symbols
, asymbol
*symbol
,
6986 const char **filename_ptr
, unsigned int *line_ptr
)
6988 return _bfd_dwarf2_find_line (abfd
, symbols
, symbol
,
6989 filename_ptr
, line_ptr
, 0,
6990 &elf_tdata (abfd
)->dwarf2_find_line_info
);
6993 /* After a call to bfd_find_nearest_line, successive calls to
6994 bfd_find_inliner_info can be used to get source information about
6995 each level of function inlining that terminated at the address
6996 passed to bfd_find_nearest_line. Currently this is only supported
6997 for DWARF2 with appropriate DWARF3 extensions. */
7000 _bfd_elf_find_inliner_info (bfd
*abfd
,
7001 const char **filename_ptr
,
7002 const char **functionname_ptr
,
7003 unsigned int *line_ptr
)
7006 found
= _bfd_dwarf2_find_inliner_info (abfd
, filename_ptr
,
7007 functionname_ptr
, line_ptr
,
7008 & elf_tdata (abfd
)->dwarf2_find_line_info
);
7013 _bfd_elf_sizeof_headers (bfd
*abfd
, struct bfd_link_info
*info
)
7015 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
7016 int ret
= bed
->s
->sizeof_ehdr
;
7018 if (!info
->relocatable
)
7020 bfd_size_type phdr_size
= elf_tdata (abfd
)->program_header_size
;
7022 if (phdr_size
== (bfd_size_type
) -1)
7024 struct elf_segment_map
*m
;
7027 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
7028 phdr_size
+= bed
->s
->sizeof_phdr
;
7031 phdr_size
= get_program_header_size (abfd
, info
);
7034 elf_tdata (abfd
)->program_header_size
= phdr_size
;
7042 _bfd_elf_set_section_contents (bfd
*abfd
,
7044 const void *location
,
7046 bfd_size_type count
)
7048 Elf_Internal_Shdr
*hdr
;
7051 if (! abfd
->output_has_begun
7052 && ! _bfd_elf_compute_section_file_positions (abfd
, NULL
))
7055 hdr
= &elf_section_data (section
)->this_hdr
;
7056 pos
= hdr
->sh_offset
+ offset
;
7057 if (bfd_seek (abfd
, pos
, SEEK_SET
) != 0
7058 || bfd_bwrite (location
, count
, abfd
) != count
)
7065 _bfd_elf_no_info_to_howto (bfd
*abfd ATTRIBUTE_UNUSED
,
7066 arelent
*cache_ptr ATTRIBUTE_UNUSED
,
7067 Elf_Internal_Rela
*dst ATTRIBUTE_UNUSED
)
7072 /* Try to convert a non-ELF reloc into an ELF one. */
7075 _bfd_elf_validate_reloc (bfd
*abfd
, arelent
*areloc
)
7077 /* Check whether we really have an ELF howto. */
7079 if ((*areloc
->sym_ptr_ptr
)->the_bfd
->xvec
!= abfd
->xvec
)
7081 bfd_reloc_code_real_type code
;
7082 reloc_howto_type
*howto
;
7084 /* Alien reloc: Try to determine its type to replace it with an
7085 equivalent ELF reloc. */
7087 if (areloc
->howto
->pc_relative
)
7089 switch (areloc
->howto
->bitsize
)
7092 code
= BFD_RELOC_8_PCREL
;
7095 code
= BFD_RELOC_12_PCREL
;
7098 code
= BFD_RELOC_16_PCREL
;
7101 code
= BFD_RELOC_24_PCREL
;
7104 code
= BFD_RELOC_32_PCREL
;
7107 code
= BFD_RELOC_64_PCREL
;
7113 howto
= bfd_reloc_type_lookup (abfd
, code
);
7115 if (areloc
->howto
->pcrel_offset
!= howto
->pcrel_offset
)
7117 if (howto
->pcrel_offset
)
7118 areloc
->addend
+= areloc
->address
;
7120 areloc
->addend
-= areloc
->address
; /* addend is unsigned!! */
7125 switch (areloc
->howto
->bitsize
)
7131 code
= BFD_RELOC_14
;
7134 code
= BFD_RELOC_16
;
7137 code
= BFD_RELOC_26
;
7140 code
= BFD_RELOC_32
;
7143 code
= BFD_RELOC_64
;
7149 howto
= bfd_reloc_type_lookup (abfd
, code
);
7153 areloc
->howto
= howto
;
7161 (*_bfd_error_handler
)
7162 (_("%B: unsupported relocation type %s"),
7163 abfd
, areloc
->howto
->name
);
7164 bfd_set_error (bfd_error_bad_value
);
7169 _bfd_elf_close_and_cleanup (bfd
*abfd
)
7171 if (bfd_get_format (abfd
) == bfd_object
)
7173 if (elf_tdata (abfd
) != NULL
&& elf_shstrtab (abfd
) != NULL
)
7174 _bfd_elf_strtab_free (elf_shstrtab (abfd
));
7175 _bfd_dwarf2_cleanup_debug_info (abfd
);
7178 return _bfd_generic_close_and_cleanup (abfd
);
7181 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
7182 in the relocation's offset. Thus we cannot allow any sort of sanity
7183 range-checking to interfere. There is nothing else to do in processing
7186 bfd_reloc_status_type
7187 _bfd_elf_rel_vtable_reloc_fn
7188 (bfd
*abfd ATTRIBUTE_UNUSED
, arelent
*re ATTRIBUTE_UNUSED
,
7189 struct bfd_symbol
*symbol ATTRIBUTE_UNUSED
,
7190 void *data ATTRIBUTE_UNUSED
, asection
*is ATTRIBUTE_UNUSED
,
7191 bfd
*obfd ATTRIBUTE_UNUSED
, char **errmsg ATTRIBUTE_UNUSED
)
7193 return bfd_reloc_ok
;
7196 /* Elf core file support. Much of this only works on native
7197 toolchains, since we rely on knowing the
7198 machine-dependent procfs structure in order to pick
7199 out details about the corefile. */
7201 #ifdef HAVE_SYS_PROCFS_H
7202 # include <sys/procfs.h>
7205 /* FIXME: this is kinda wrong, but it's what gdb wants. */
7208 elfcore_make_pid (bfd
*abfd
)
7210 return ((elf_tdata (abfd
)->core_lwpid
<< 16)
7211 + (elf_tdata (abfd
)->core_pid
));
7214 /* If there isn't a section called NAME, make one, using
7215 data from SECT. Note, this function will generate a
7216 reference to NAME, so you shouldn't deallocate or
7220 elfcore_maybe_make_sect (bfd
*abfd
, char *name
, asection
*sect
)
7224 if (bfd_get_section_by_name (abfd
, name
) != NULL
)
7227 sect2
= bfd_make_section_with_flags (abfd
, name
, sect
->flags
);
7231 sect2
->size
= sect
->size
;
7232 sect2
->filepos
= sect
->filepos
;
7233 sect2
->alignment_power
= sect
->alignment_power
;
7237 /* Create a pseudosection containing SIZE bytes at FILEPOS. This
7238 actually creates up to two pseudosections:
7239 - For the single-threaded case, a section named NAME, unless
7240 such a section already exists.
7241 - For the multi-threaded case, a section named "NAME/PID", where
7242 PID is elfcore_make_pid (abfd).
7243 Both pseudosections have identical contents. */
7245 _bfd_elfcore_make_pseudosection (bfd
*abfd
,
7251 char *threaded_name
;
7255 /* Build the section name. */
7257 sprintf (buf
, "%s/%d", name
, elfcore_make_pid (abfd
));
7258 len
= strlen (buf
) + 1;
7259 threaded_name
= bfd_alloc (abfd
, len
);
7260 if (threaded_name
== NULL
)
7262 memcpy (threaded_name
, buf
, len
);
7264 sect
= bfd_make_section_anyway_with_flags (abfd
, threaded_name
,
7269 sect
->filepos
= filepos
;
7270 sect
->alignment_power
= 2;
7272 return elfcore_maybe_make_sect (abfd
, name
, sect
);
7275 /* prstatus_t exists on:
7277 linux 2.[01] + glibc
7281 #if defined (HAVE_PRSTATUS_T)
7284 elfcore_grok_prstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
7289 if (note
->descsz
== sizeof (prstatus_t
))
7293 size
= sizeof (prstat
.pr_reg
);
7294 offset
= offsetof (prstatus_t
, pr_reg
);
7295 memcpy (&prstat
, note
->descdata
, sizeof (prstat
));
7297 /* Do not overwrite the core signal if it
7298 has already been set by another thread. */
7299 if (elf_tdata (abfd
)->core_signal
== 0)
7300 elf_tdata (abfd
)->core_signal
= prstat
.pr_cursig
;
7301 elf_tdata (abfd
)->core_pid
= prstat
.pr_pid
;
7303 /* pr_who exists on:
7306 pr_who doesn't exist on:
7309 #if defined (HAVE_PRSTATUS_T_PR_WHO)
7310 elf_tdata (abfd
)->core_lwpid
= prstat
.pr_who
;
7313 #if defined (HAVE_PRSTATUS32_T)
7314 else if (note
->descsz
== sizeof (prstatus32_t
))
7316 /* 64-bit host, 32-bit corefile */
7317 prstatus32_t prstat
;
7319 size
= sizeof (prstat
.pr_reg
);
7320 offset
= offsetof (prstatus32_t
, pr_reg
);
7321 memcpy (&prstat
, note
->descdata
, sizeof (prstat
));
7323 /* Do not overwrite the core signal if it
7324 has already been set by another thread. */
7325 if (elf_tdata (abfd
)->core_signal
== 0)
7326 elf_tdata (abfd
)->core_signal
= prstat
.pr_cursig
;
7327 elf_tdata (abfd
)->core_pid
= prstat
.pr_pid
;
7329 /* pr_who exists on:
7332 pr_who doesn't exist on:
7335 #if defined (HAVE_PRSTATUS32_T_PR_WHO)
7336 elf_tdata (abfd
)->core_lwpid
= prstat
.pr_who
;
7339 #endif /* HAVE_PRSTATUS32_T */
7342 /* Fail - we don't know how to handle any other
7343 note size (ie. data object type). */
7347 /* Make a ".reg/999" section and a ".reg" section. */
7348 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
7349 size
, note
->descpos
+ offset
);
7351 #endif /* defined (HAVE_PRSTATUS_T) */
7353 /* Create a pseudosection containing the exact contents of NOTE. */
7355 elfcore_make_note_pseudosection (bfd
*abfd
,
7357 Elf_Internal_Note
*note
)
7359 return _bfd_elfcore_make_pseudosection (abfd
, name
,
7360 note
->descsz
, note
->descpos
);
7363 /* There isn't a consistent prfpregset_t across platforms,
7364 but it doesn't matter, because we don't have to pick this
7365 data structure apart. */
7368 elfcore_grok_prfpreg (bfd
*abfd
, Elf_Internal_Note
*note
)
7370 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
7373 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
7374 type of 5 (NT_PRXFPREG). Just include the whole note's contents
7378 elfcore_grok_prxfpreg (bfd
*abfd
, Elf_Internal_Note
*note
)
7380 return elfcore_make_note_pseudosection (abfd
, ".reg-xfp", note
);
7383 #if defined (HAVE_PRPSINFO_T)
7384 typedef prpsinfo_t elfcore_psinfo_t
;
7385 #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
7386 typedef prpsinfo32_t elfcore_psinfo32_t
;
7390 #if defined (HAVE_PSINFO_T)
7391 typedef psinfo_t elfcore_psinfo_t
;
7392 #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
7393 typedef psinfo32_t elfcore_psinfo32_t
;
7397 /* return a malloc'ed copy of a string at START which is at
7398 most MAX bytes long, possibly without a terminating '\0'.
7399 the copy will always have a terminating '\0'. */
7402 _bfd_elfcore_strndup (bfd
*abfd
, char *start
, size_t max
)
7405 char *end
= memchr (start
, '\0', max
);
7413 dups
= bfd_alloc (abfd
, len
+ 1);
7417 memcpy (dups
, start
, len
);
7423 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7425 elfcore_grok_psinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
7427 if (note
->descsz
== sizeof (elfcore_psinfo_t
))
7429 elfcore_psinfo_t psinfo
;
7431 memcpy (&psinfo
, note
->descdata
, sizeof (psinfo
));
7433 elf_tdata (abfd
)->core_program
7434 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_fname
,
7435 sizeof (psinfo
.pr_fname
));
7437 elf_tdata (abfd
)->core_command
7438 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_psargs
,
7439 sizeof (psinfo
.pr_psargs
));
7441 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
7442 else if (note
->descsz
== sizeof (elfcore_psinfo32_t
))
7444 /* 64-bit host, 32-bit corefile */
7445 elfcore_psinfo32_t psinfo
;
7447 memcpy (&psinfo
, note
->descdata
, sizeof (psinfo
));
7449 elf_tdata (abfd
)->core_program
7450 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_fname
,
7451 sizeof (psinfo
.pr_fname
));
7453 elf_tdata (abfd
)->core_command
7454 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_psargs
,
7455 sizeof (psinfo
.pr_psargs
));
7461 /* Fail - we don't know how to handle any other
7462 note size (ie. data object type). */
7466 /* Note that for some reason, a spurious space is tacked
7467 onto the end of the args in some (at least one anyway)
7468 implementations, so strip it off if it exists. */
7471 char *command
= elf_tdata (abfd
)->core_command
;
7472 int n
= strlen (command
);
7474 if (0 < n
&& command
[n
- 1] == ' ')
7475 command
[n
- 1] = '\0';
7480 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
7482 #if defined (HAVE_PSTATUS_T)
7484 elfcore_grok_pstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
7486 if (note
->descsz
== sizeof (pstatus_t
)
7487 #if defined (HAVE_PXSTATUS_T)
7488 || note
->descsz
== sizeof (pxstatus_t
)
7494 memcpy (&pstat
, note
->descdata
, sizeof (pstat
));
7496 elf_tdata (abfd
)->core_pid
= pstat
.pr_pid
;
7498 #if defined (HAVE_PSTATUS32_T)
7499 else if (note
->descsz
== sizeof (pstatus32_t
))
7501 /* 64-bit host, 32-bit corefile */
7504 memcpy (&pstat
, note
->descdata
, sizeof (pstat
));
7506 elf_tdata (abfd
)->core_pid
= pstat
.pr_pid
;
7509 /* Could grab some more details from the "representative"
7510 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
7511 NT_LWPSTATUS note, presumably. */
7515 #endif /* defined (HAVE_PSTATUS_T) */
7517 #if defined (HAVE_LWPSTATUS_T)
7519 elfcore_grok_lwpstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
7521 lwpstatus_t lwpstat
;
7527 if (note
->descsz
!= sizeof (lwpstat
)
7528 #if defined (HAVE_LWPXSTATUS_T)
7529 && note
->descsz
!= sizeof (lwpxstatus_t
)
7534 memcpy (&lwpstat
, note
->descdata
, sizeof (lwpstat
));
7536 elf_tdata (abfd
)->core_lwpid
= lwpstat
.pr_lwpid
;
7537 elf_tdata (abfd
)->core_signal
= lwpstat
.pr_cursig
;
7539 /* Make a ".reg/999" section. */
7541 sprintf (buf
, ".reg/%d", elfcore_make_pid (abfd
));
7542 len
= strlen (buf
) + 1;
7543 name
= bfd_alloc (abfd
, len
);
7546 memcpy (name
, buf
, len
);
7548 sect
= bfd_make_section_anyway_with_flags (abfd
, name
, SEC_HAS_CONTENTS
);
7552 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7553 sect
->size
= sizeof (lwpstat
.pr_context
.uc_mcontext
.gregs
);
7554 sect
->filepos
= note
->descpos
7555 + offsetof (lwpstatus_t
, pr_context
.uc_mcontext
.gregs
);
7558 #if defined (HAVE_LWPSTATUS_T_PR_REG)
7559 sect
->size
= sizeof (lwpstat
.pr_reg
);
7560 sect
->filepos
= note
->descpos
+ offsetof (lwpstatus_t
, pr_reg
);
7563 sect
->alignment_power
= 2;
7565 if (!elfcore_maybe_make_sect (abfd
, ".reg", sect
))
7568 /* Make a ".reg2/999" section */
7570 sprintf (buf
, ".reg2/%d", elfcore_make_pid (abfd
));
7571 len
= strlen (buf
) + 1;
7572 name
= bfd_alloc (abfd
, len
);
7575 memcpy (name
, buf
, len
);
7577 sect
= bfd_make_section_anyway_with_flags (abfd
, name
, SEC_HAS_CONTENTS
);
7581 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7582 sect
->size
= sizeof (lwpstat
.pr_context
.uc_mcontext
.fpregs
);
7583 sect
->filepos
= note
->descpos
7584 + offsetof (lwpstatus_t
, pr_context
.uc_mcontext
.fpregs
);
7587 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
7588 sect
->size
= sizeof (lwpstat
.pr_fpreg
);
7589 sect
->filepos
= note
->descpos
+ offsetof (lwpstatus_t
, pr_fpreg
);
7592 sect
->alignment_power
= 2;
7594 return elfcore_maybe_make_sect (abfd
, ".reg2", sect
);
7596 #endif /* defined (HAVE_LWPSTATUS_T) */
7598 #if defined (HAVE_WIN32_PSTATUS_T)
7600 elfcore_grok_win32pstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
7606 win32_pstatus_t pstatus
;
7608 if (note
->descsz
< sizeof (pstatus
))
7611 memcpy (&pstatus
, note
->descdata
, sizeof (pstatus
));
7613 switch (pstatus
.data_type
)
7615 case NOTE_INFO_PROCESS
:
7616 /* FIXME: need to add ->core_command. */
7617 elf_tdata (abfd
)->core_signal
= pstatus
.data
.process_info
.signal
;
7618 elf_tdata (abfd
)->core_pid
= pstatus
.data
.process_info
.pid
;
7621 case NOTE_INFO_THREAD
:
7622 /* Make a ".reg/999" section. */
7623 sprintf (buf
, ".reg/%ld", (long) pstatus
.data
.thread_info
.tid
);
7625 len
= strlen (buf
) + 1;
7626 name
= bfd_alloc (abfd
, len
);
7630 memcpy (name
, buf
, len
);
7632 sect
= bfd_make_section_anyway_with_flags (abfd
, name
, SEC_HAS_CONTENTS
);
7636 sect
->size
= sizeof (pstatus
.data
.thread_info
.thread_context
);
7637 sect
->filepos
= (note
->descpos
7638 + offsetof (struct win32_pstatus
,
7639 data
.thread_info
.thread_context
));
7640 sect
->alignment_power
= 2;
7642 if (pstatus
.data
.thread_info
.is_active_thread
)
7643 if (! elfcore_maybe_make_sect (abfd
, ".reg", sect
))
7647 case NOTE_INFO_MODULE
:
7648 /* Make a ".module/xxxxxxxx" section. */
7649 sprintf (buf
, ".module/%08lx",
7650 (long) pstatus
.data
.module_info
.base_address
);
7652 len
= strlen (buf
) + 1;
7653 name
= bfd_alloc (abfd
, len
);
7657 memcpy (name
, buf
, len
);
7659 sect
= bfd_make_section_anyway_with_flags (abfd
, name
, SEC_HAS_CONTENTS
);
7664 sect
->size
= note
->descsz
;
7665 sect
->filepos
= note
->descpos
;
7666 sect
->alignment_power
= 2;
7675 #endif /* HAVE_WIN32_PSTATUS_T */
7678 elfcore_grok_note (bfd
*abfd
, Elf_Internal_Note
*note
)
7680 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
7688 if (bed
->elf_backend_grok_prstatus
)
7689 if ((*bed
->elf_backend_grok_prstatus
) (abfd
, note
))
7691 #if defined (HAVE_PRSTATUS_T)
7692 return elfcore_grok_prstatus (abfd
, note
);
7697 #if defined (HAVE_PSTATUS_T)
7699 return elfcore_grok_pstatus (abfd
, note
);
7702 #if defined (HAVE_LWPSTATUS_T)
7704 return elfcore_grok_lwpstatus (abfd
, note
);
7707 case NT_FPREGSET
: /* FIXME: rename to NT_PRFPREG */
7708 return elfcore_grok_prfpreg (abfd
, note
);
7710 #if defined (HAVE_WIN32_PSTATUS_T)
7711 case NT_WIN32PSTATUS
:
7712 return elfcore_grok_win32pstatus (abfd
, note
);
7715 case NT_PRXFPREG
: /* Linux SSE extension */
7716 if (note
->namesz
== 6
7717 && strcmp (note
->namedata
, "LINUX") == 0)
7718 return elfcore_grok_prxfpreg (abfd
, note
);
7724 if (bed
->elf_backend_grok_psinfo
)
7725 if ((*bed
->elf_backend_grok_psinfo
) (abfd
, note
))
7727 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7728 return elfcore_grok_psinfo (abfd
, note
);
7735 asection
*sect
= bfd_make_section_anyway_with_flags (abfd
, ".auxv",
7740 sect
->size
= note
->descsz
;
7741 sect
->filepos
= note
->descpos
;
7742 sect
->alignment_power
= 1 + bfd_get_arch_size (abfd
) / 32;
7750 elfcore_netbsd_get_lwpid (Elf_Internal_Note
*note
, int *lwpidp
)
7754 cp
= strchr (note
->namedata
, '@');
7757 *lwpidp
= atoi(cp
+ 1);
7764 elfcore_grok_netbsd_procinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
7766 /* Signal number at offset 0x08. */
7767 elf_tdata (abfd
)->core_signal
7768 = bfd_h_get_32 (abfd
, (bfd_byte
*) note
->descdata
+ 0x08);
7770 /* Process ID at offset 0x50. */
7771 elf_tdata (abfd
)->core_pid
7772 = bfd_h_get_32 (abfd
, (bfd_byte
*) note
->descdata
+ 0x50);
7774 /* Command name at 0x7c (max 32 bytes, including nul). */
7775 elf_tdata (abfd
)->core_command
7776 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 0x7c, 31);
7778 return elfcore_make_note_pseudosection (abfd
, ".note.netbsdcore.procinfo",
7783 elfcore_grok_netbsd_note (bfd
*abfd
, Elf_Internal_Note
*note
)
7787 if (elfcore_netbsd_get_lwpid (note
, &lwp
))
7788 elf_tdata (abfd
)->core_lwpid
= lwp
;
7790 if (note
->type
== NT_NETBSDCORE_PROCINFO
)
7792 /* NetBSD-specific core "procinfo". Note that we expect to
7793 find this note before any of the others, which is fine,
7794 since the kernel writes this note out first when it
7795 creates a core file. */
7797 return elfcore_grok_netbsd_procinfo (abfd
, note
);
7800 /* As of Jan 2002 there are no other machine-independent notes
7801 defined for NetBSD core files. If the note type is less
7802 than the start of the machine-dependent note types, we don't
7805 if (note
->type
< NT_NETBSDCORE_FIRSTMACH
)
7809 switch (bfd_get_arch (abfd
))
7811 /* On the Alpha, SPARC (32-bit and 64-bit), PT_GETREGS == mach+0 and
7812 PT_GETFPREGS == mach+2. */
7814 case bfd_arch_alpha
:
7815 case bfd_arch_sparc
:
7818 case NT_NETBSDCORE_FIRSTMACH
+0:
7819 return elfcore_make_note_pseudosection (abfd
, ".reg", note
);
7821 case NT_NETBSDCORE_FIRSTMACH
+2:
7822 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
7828 /* On all other arch's, PT_GETREGS == mach+1 and
7829 PT_GETFPREGS == mach+3. */
7834 case NT_NETBSDCORE_FIRSTMACH
+1:
7835 return elfcore_make_note_pseudosection (abfd
, ".reg", note
);
7837 case NT_NETBSDCORE_FIRSTMACH
+3:
7838 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
7848 elfcore_grok_nto_status (bfd
*abfd
, Elf_Internal_Note
*note
, long *tid
)
7850 void *ddata
= note
->descdata
;
7857 /* nto_procfs_status 'pid' field is at offset 0. */
7858 elf_tdata (abfd
)->core_pid
= bfd_get_32 (abfd
, (bfd_byte
*) ddata
);
7860 /* nto_procfs_status 'tid' field is at offset 4. Pass it back. */
7861 *tid
= bfd_get_32 (abfd
, (bfd_byte
*) ddata
+ 4);
7863 /* nto_procfs_status 'flags' field is at offset 8. */
7864 flags
= bfd_get_32 (abfd
, (bfd_byte
*) ddata
+ 8);
7866 /* nto_procfs_status 'what' field is at offset 14. */
7867 if ((sig
= bfd_get_16 (abfd
, (bfd_byte
*) ddata
+ 14)) > 0)
7869 elf_tdata (abfd
)->core_signal
= sig
;
7870 elf_tdata (abfd
)->core_lwpid
= *tid
;
7873 /* _DEBUG_FLAG_CURTID (current thread) is 0x80. Some cores
7874 do not come from signals so we make sure we set the current
7875 thread just in case. */
7876 if (flags
& 0x00000080)
7877 elf_tdata (abfd
)->core_lwpid
= *tid
;
7879 /* Make a ".qnx_core_status/%d" section. */
7880 sprintf (buf
, ".qnx_core_status/%ld", *tid
);
7882 name
= bfd_alloc (abfd
, strlen (buf
) + 1);
7887 sect
= bfd_make_section_anyway_with_flags (abfd
, name
, SEC_HAS_CONTENTS
);
7891 sect
->size
= note
->descsz
;
7892 sect
->filepos
= note
->descpos
;
7893 sect
->alignment_power
= 2;
7895 return (elfcore_maybe_make_sect (abfd
, ".qnx_core_status", sect
));
7899 elfcore_grok_nto_regs (bfd
*abfd
,
7900 Elf_Internal_Note
*note
,
7908 /* Make a "(base)/%d" section. */
7909 sprintf (buf
, "%s/%ld", base
, tid
);
7911 name
= bfd_alloc (abfd
, strlen (buf
) + 1);
7916 sect
= bfd_make_section_anyway_with_flags (abfd
, name
, SEC_HAS_CONTENTS
);
7920 sect
->size
= note
->descsz
;
7921 sect
->filepos
= note
->descpos
;
7922 sect
->alignment_power
= 2;
7924 /* This is the current thread. */
7925 if (elf_tdata (abfd
)->core_lwpid
== tid
)
7926 return elfcore_maybe_make_sect (abfd
, base
, sect
);
7931 #define BFD_QNT_CORE_INFO 7
7932 #define BFD_QNT_CORE_STATUS 8
7933 #define BFD_QNT_CORE_GREG 9
7934 #define BFD_QNT_CORE_FPREG 10
7937 elfcore_grok_nto_note (bfd
*abfd
, Elf_Internal_Note
*note
)
7939 /* Every GREG section has a STATUS section before it. Store the
7940 tid from the previous call to pass down to the next gregs
7942 static long tid
= 1;
7946 case BFD_QNT_CORE_INFO
:
7947 return elfcore_make_note_pseudosection (abfd
, ".qnx_core_info", note
);
7948 case BFD_QNT_CORE_STATUS
:
7949 return elfcore_grok_nto_status (abfd
, note
, &tid
);
7950 case BFD_QNT_CORE_GREG
:
7951 return elfcore_grok_nto_regs (abfd
, note
, tid
, ".reg");
7952 case BFD_QNT_CORE_FPREG
:
7953 return elfcore_grok_nto_regs (abfd
, note
, tid
, ".reg2");
7959 /* Function: elfcore_write_note
7962 buffer to hold note, and current size of buffer
7966 size of data for note
7968 Writes note to end of buffer. ELF64 notes are written exactly as
7969 for ELF32, despite the current (as of 2006) ELF gabi specifying
7970 that they ought to have 8-byte namesz and descsz field, and have
7971 8-byte alignment. Other writers, eg. Linux kernel, do the same.
7974 Pointer to realloc'd buffer, *BUFSIZ updated. */
7977 elfcore_write_note (bfd
*abfd
,
7985 Elf_External_Note
*xnp
;
7992 namesz
= strlen (name
) + 1;
7994 newspace
= 12 + ((namesz
+ 3) & -4) + ((size
+ 3) & -4);
7996 buf
= realloc (buf
, *bufsiz
+ newspace
);
7997 dest
= buf
+ *bufsiz
;
7998 *bufsiz
+= newspace
;
7999 xnp
= (Elf_External_Note
*) dest
;
8000 H_PUT_32 (abfd
, namesz
, xnp
->namesz
);
8001 H_PUT_32 (abfd
, size
, xnp
->descsz
);
8002 H_PUT_32 (abfd
, type
, xnp
->type
);
8006 memcpy (dest
, name
, namesz
);
8014 memcpy (dest
, input
, size
);
8024 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
8026 elfcore_write_prpsinfo (bfd
*abfd
,
8032 const char *note_name
= "CORE";
8033 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
8035 if (bed
->elf_backend_write_core_note
!= NULL
)
8038 ret
= (*bed
->elf_backend_write_core_note
) (abfd
, buf
, bufsiz
,
8039 NT_PRPSINFO
, fname
, psargs
);
8044 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
8045 if (bed
->s
->elfclass
== ELFCLASS32
)
8047 #if defined (HAVE_PSINFO32_T)
8049 int note_type
= NT_PSINFO
;
8052 int note_type
= NT_PRPSINFO
;
8055 memset (&data
, 0, sizeof (data
));
8056 strncpy (data
.pr_fname
, fname
, sizeof (data
.pr_fname
));
8057 strncpy (data
.pr_psargs
, psargs
, sizeof (data
.pr_psargs
));
8058 return elfcore_write_note (abfd
, buf
, bufsiz
,
8059 note_name
, note_type
, &data
, sizeof (data
));
8064 #if defined (HAVE_PSINFO_T)
8066 int note_type
= NT_PSINFO
;
8069 int note_type
= NT_PRPSINFO
;
8072 memset (&data
, 0, sizeof (data
));
8073 strncpy (data
.pr_fname
, fname
, sizeof (data
.pr_fname
));
8074 strncpy (data
.pr_psargs
, psargs
, sizeof (data
.pr_psargs
));
8075 return elfcore_write_note (abfd
, buf
, bufsiz
,
8076 note_name
, note_type
, &data
, sizeof (data
));
8079 #endif /* PSINFO_T or PRPSINFO_T */
8081 #if defined (HAVE_PRSTATUS_T)
8083 elfcore_write_prstatus (bfd
*abfd
,
8090 const char *note_name
= "CORE";
8091 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
8093 if (bed
->elf_backend_write_core_note
!= NULL
)
8096 ret
= (*bed
->elf_backend_write_core_note
) (abfd
, buf
, bufsiz
,
8098 pid
, cursig
, gregs
);
8103 #if defined (HAVE_PRSTATUS32_T)
8104 if (bed
->s
->elfclass
== ELFCLASS32
)
8106 prstatus32_t prstat
;
8108 memset (&prstat
, 0, sizeof (prstat
));
8109 prstat
.pr_pid
= pid
;
8110 prstat
.pr_cursig
= cursig
;
8111 memcpy (&prstat
.pr_reg
, gregs
, sizeof (prstat
.pr_reg
));
8112 return elfcore_write_note (abfd
, buf
, bufsiz
, note_name
,
8113 NT_PRSTATUS
, &prstat
, sizeof (prstat
));
8120 memset (&prstat
, 0, sizeof (prstat
));
8121 prstat
.pr_pid
= pid
;
8122 prstat
.pr_cursig
= cursig
;
8123 memcpy (&prstat
.pr_reg
, gregs
, sizeof (prstat
.pr_reg
));
8124 return elfcore_write_note (abfd
, buf
, bufsiz
, note_name
,
8125 NT_PRSTATUS
, &prstat
, sizeof (prstat
));
8128 #endif /* HAVE_PRSTATUS_T */
8130 #if defined (HAVE_LWPSTATUS_T)
8132 elfcore_write_lwpstatus (bfd
*abfd
,
8139 lwpstatus_t lwpstat
;
8140 const char *note_name
= "CORE";
8142 memset (&lwpstat
, 0, sizeof (lwpstat
));
8143 lwpstat
.pr_lwpid
= pid
>> 16;
8144 lwpstat
.pr_cursig
= cursig
;
8145 #if defined (HAVE_LWPSTATUS_T_PR_REG)
8146 memcpy (lwpstat
.pr_reg
, gregs
, sizeof (lwpstat
.pr_reg
));
8147 #elif defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
8149 memcpy (lwpstat
.pr_context
.uc_mcontext
.gregs
,
8150 gregs
, sizeof (lwpstat
.pr_context
.uc_mcontext
.gregs
));
8152 memcpy (lwpstat
.pr_context
.uc_mcontext
.__gregs
,
8153 gregs
, sizeof (lwpstat
.pr_context
.uc_mcontext
.__gregs
));
8156 return elfcore_write_note (abfd
, buf
, bufsiz
, note_name
,
8157 NT_LWPSTATUS
, &lwpstat
, sizeof (lwpstat
));
8159 #endif /* HAVE_LWPSTATUS_T */
8161 #if defined (HAVE_PSTATUS_T)
8163 elfcore_write_pstatus (bfd
*abfd
,
8167 int cursig ATTRIBUTE_UNUSED
,
8168 const void *gregs ATTRIBUTE_UNUSED
)
8170 const char *note_name
= "CORE";
8171 #if defined (HAVE_PSTATUS32_T)
8172 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
8174 if (bed
->s
->elfclass
== ELFCLASS32
)
8178 memset (&pstat
, 0, sizeof (pstat
));
8179 pstat
.pr_pid
= pid
& 0xffff;
8180 buf
= elfcore_write_note (abfd
, buf
, bufsiz
, note_name
,
8181 NT_PSTATUS
, &pstat
, sizeof (pstat
));
8189 memset (&pstat
, 0, sizeof (pstat
));
8190 pstat
.pr_pid
= pid
& 0xffff;
8191 buf
= elfcore_write_note (abfd
, buf
, bufsiz
, note_name
,
8192 NT_PSTATUS
, &pstat
, sizeof (pstat
));
8196 #endif /* HAVE_PSTATUS_T */
8199 elfcore_write_prfpreg (bfd
*abfd
,
8205 const char *note_name
= "CORE";
8206 return elfcore_write_note (abfd
, buf
, bufsiz
,
8207 note_name
, NT_FPREGSET
, fpregs
, size
);
8211 elfcore_write_prxfpreg (bfd
*abfd
,
8214 const void *xfpregs
,
8217 char *note_name
= "LINUX";
8218 return elfcore_write_note (abfd
, buf
, bufsiz
,
8219 note_name
, NT_PRXFPREG
, xfpregs
, size
);
8223 elfcore_read_notes (bfd
*abfd
, file_ptr offset
, bfd_size_type size
)
8231 if (bfd_seek (abfd
, offset
, SEEK_SET
) != 0)
8234 buf
= bfd_malloc (size
);
8238 if (bfd_bread (buf
, size
, abfd
) != size
)
8246 while (p
< buf
+ size
)
8248 /* FIXME: bad alignment assumption. */
8249 Elf_External_Note
*xnp
= (Elf_External_Note
*) p
;
8250 Elf_Internal_Note in
;
8252 in
.type
= H_GET_32 (abfd
, xnp
->type
);
8254 in
.namesz
= H_GET_32 (abfd
, xnp
->namesz
);
8255 in
.namedata
= xnp
->name
;
8257 in
.descsz
= H_GET_32 (abfd
, xnp
->descsz
);
8258 in
.descdata
= in
.namedata
+ BFD_ALIGN (in
.namesz
, 4);
8259 in
.descpos
= offset
+ (in
.descdata
- buf
);
8261 if (CONST_STRNEQ (in
.namedata
, "NetBSD-CORE"))
8263 if (! elfcore_grok_netbsd_note (abfd
, &in
))
8266 else if (CONST_STRNEQ (in
.namedata
, "QNX"))
8268 if (! elfcore_grok_nto_note (abfd
, &in
))
8273 if (! elfcore_grok_note (abfd
, &in
))
8277 p
= in
.descdata
+ BFD_ALIGN (in
.descsz
, 4);
8284 /* Providing external access to the ELF program header table. */
8286 /* Return an upper bound on the number of bytes required to store a
8287 copy of ABFD's program header table entries. Return -1 if an error
8288 occurs; bfd_get_error will return an appropriate code. */
8291 bfd_get_elf_phdr_upper_bound (bfd
*abfd
)
8293 if (abfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
8295 bfd_set_error (bfd_error_wrong_format
);
8299 return elf_elfheader (abfd
)->e_phnum
* sizeof (Elf_Internal_Phdr
);
8302 /* Copy ABFD's program header table entries to *PHDRS. The entries
8303 will be stored as an array of Elf_Internal_Phdr structures, as
8304 defined in include/elf/internal.h. To find out how large the
8305 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
8307 Return the number of program header table entries read, or -1 if an
8308 error occurs; bfd_get_error will return an appropriate code. */
8311 bfd_get_elf_phdrs (bfd
*abfd
, void *phdrs
)
8315 if (abfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
8317 bfd_set_error (bfd_error_wrong_format
);
8321 num_phdrs
= elf_elfheader (abfd
)->e_phnum
;
8322 memcpy (phdrs
, elf_tdata (abfd
)->phdr
,
8323 num_phdrs
* sizeof (Elf_Internal_Phdr
));
8329 _bfd_elf_sprintf_vma (bfd
*abfd ATTRIBUTE_UNUSED
, char *buf
, bfd_vma value
)
8332 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
8334 i_ehdrp
= elf_elfheader (abfd
);
8335 if (i_ehdrp
== NULL
)
8336 sprintf_vma (buf
, value
);
8339 if (i_ehdrp
->e_ident
[EI_CLASS
] == ELFCLASS64
)
8341 #if BFD_HOST_64BIT_LONG
8342 sprintf (buf
, "%016lx", value
);
8344 sprintf (buf
, "%08lx%08lx", _bfd_int64_high (value
),
8345 _bfd_int64_low (value
));
8349 sprintf (buf
, "%08lx", (unsigned long) (value
& 0xffffffff));
8352 sprintf_vma (buf
, value
);
8357 _bfd_elf_fprintf_vma (bfd
*abfd ATTRIBUTE_UNUSED
, void *stream
, bfd_vma value
)
8360 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
8362 i_ehdrp
= elf_elfheader (abfd
);
8363 if (i_ehdrp
== NULL
)
8364 fprintf_vma ((FILE *) stream
, value
);
8367 if (i_ehdrp
->e_ident
[EI_CLASS
] == ELFCLASS64
)
8369 #if BFD_HOST_64BIT_LONG
8370 fprintf ((FILE *) stream
, "%016lx", value
);
8372 fprintf ((FILE *) stream
, "%08lx%08lx",
8373 _bfd_int64_high (value
), _bfd_int64_low (value
));
8377 fprintf ((FILE *) stream
, "%08lx",
8378 (unsigned long) (value
& 0xffffffff));
8381 fprintf_vma ((FILE *) stream
, value
);
8385 enum elf_reloc_type_class
8386 _bfd_elf_reloc_type_class (const Elf_Internal_Rela
*rela ATTRIBUTE_UNUSED
)
8388 return reloc_class_normal
;
8391 /* For RELA architectures, return the relocation value for a
8392 relocation against a local symbol. */
8395 _bfd_elf_rela_local_sym (bfd
*abfd
,
8396 Elf_Internal_Sym
*sym
,
8398 Elf_Internal_Rela
*rel
)
8400 asection
*sec
= *psec
;
8403 relocation
= (sec
->output_section
->vma
8404 + sec
->output_offset
8406 if ((sec
->flags
& SEC_MERGE
)
8407 && ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
8408 && sec
->sec_info_type
== ELF_INFO_TYPE_MERGE
)
8411 _bfd_merged_section_offset (abfd
, psec
,
8412 elf_section_data (sec
)->sec_info
,
8413 sym
->st_value
+ rel
->r_addend
);
8416 /* If we have changed the section, and our original section is
8417 marked with SEC_EXCLUDE, it means that the original
8418 SEC_MERGE section has been completely subsumed in some
8419 other SEC_MERGE section. In this case, we need to leave
8420 some info around for --emit-relocs. */
8421 if ((sec
->flags
& SEC_EXCLUDE
) != 0)
8422 sec
->kept_section
= *psec
;
8425 rel
->r_addend
-= relocation
;
8426 rel
->r_addend
+= sec
->output_section
->vma
+ sec
->output_offset
;
8432 _bfd_elf_rel_local_sym (bfd
*abfd
,
8433 Elf_Internal_Sym
*sym
,
8437 asection
*sec
= *psec
;
8439 if (sec
->sec_info_type
!= ELF_INFO_TYPE_MERGE
)
8440 return sym
->st_value
+ addend
;
8442 return _bfd_merged_section_offset (abfd
, psec
,
8443 elf_section_data (sec
)->sec_info
,
8444 sym
->st_value
+ addend
);
8448 _bfd_elf_section_offset (bfd
*abfd
,
8449 struct bfd_link_info
*info
,
8453 switch (sec
->sec_info_type
)
8455 case ELF_INFO_TYPE_STABS
:
8456 return _bfd_stab_section_offset (sec
, elf_section_data (sec
)->sec_info
,
8458 case ELF_INFO_TYPE_EH_FRAME
:
8459 return _bfd_elf_eh_frame_section_offset (abfd
, info
, sec
, offset
);
8465 /* Create a new BFD as if by bfd_openr. Rather than opening a file,
8466 reconstruct an ELF file by reading the segments out of remote memory
8467 based on the ELF file header at EHDR_VMA and the ELF program headers it
8468 points to. If not null, *LOADBASEP is filled in with the difference
8469 between the VMAs from which the segments were read, and the VMAs the
8470 file headers (and hence BFD's idea of each section's VMA) put them at.
8472 The function TARGET_READ_MEMORY is called to copy LEN bytes from the
8473 remote memory at target address VMA into the local buffer at MYADDR; it
8474 should return zero on success or an `errno' code on failure. TEMPL must
8475 be a BFD for an ELF target with the word size and byte order found in
8476 the remote memory. */
8479 bfd_elf_bfd_from_remote_memory
8483 int (*target_read_memory
) (bfd_vma
, bfd_byte
*, int))
8485 return (*get_elf_backend_data (templ
)->elf_backend_bfd_from_remote_memory
)
8486 (templ
, ehdr_vma
, loadbasep
, target_read_memory
);
8490 _bfd_elf_get_synthetic_symtab (bfd
*abfd
,
8491 long symcount ATTRIBUTE_UNUSED
,
8492 asymbol
**syms ATTRIBUTE_UNUSED
,
8497 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
8500 const char *relplt_name
;
8501 bfd_boolean (*slurp_relocs
) (bfd
*, asection
*, asymbol
**, bfd_boolean
);
8505 Elf_Internal_Shdr
*hdr
;
8511 if ((abfd
->flags
& (DYNAMIC
| EXEC_P
)) == 0)
8514 if (dynsymcount
<= 0)
8517 if (!bed
->plt_sym_val
)
8520 relplt_name
= bed
->relplt_name
;
8521 if (relplt_name
== NULL
)
8522 relplt_name
= bed
->default_use_rela_p
? ".rela.plt" : ".rel.plt";
8523 relplt
= bfd_get_section_by_name (abfd
, relplt_name
);
8527 hdr
= &elf_section_data (relplt
)->this_hdr
;
8528 if (hdr
->sh_link
!= elf_dynsymtab (abfd
)
8529 || (hdr
->sh_type
!= SHT_REL
&& hdr
->sh_type
!= SHT_RELA
))
8532 plt
= bfd_get_section_by_name (abfd
, ".plt");
8536 slurp_relocs
= get_elf_backend_data (abfd
)->s
->slurp_reloc_table
;
8537 if (! (*slurp_relocs
) (abfd
, relplt
, dynsyms
, TRUE
))
8540 count
= relplt
->size
/ hdr
->sh_entsize
;
8541 size
= count
* sizeof (asymbol
);
8542 p
= relplt
->relocation
;
8543 for (i
= 0; i
< count
; i
++, p
++)
8544 size
+= strlen ((*p
->sym_ptr_ptr
)->name
) + sizeof ("@plt");
8546 s
= *ret
= bfd_malloc (size
);
8550 names
= (char *) (s
+ count
);
8551 p
= relplt
->relocation
;
8553 for (i
= 0; i
< count
; i
++, s
++, p
++)
8558 addr
= bed
->plt_sym_val (i
, plt
, p
);
8559 if (addr
== (bfd_vma
) -1)
8562 *s
= **p
->sym_ptr_ptr
;
8563 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
8564 we are defining a symbol, ensure one of them is set. */
8565 if ((s
->flags
& BSF_LOCAL
) == 0)
8566 s
->flags
|= BSF_GLOBAL
;
8568 s
->value
= addr
- plt
->vma
;
8570 len
= strlen ((*p
->sym_ptr_ptr
)->name
);
8571 memcpy (names
, (*p
->sym_ptr_ptr
)->name
, len
);
8573 memcpy (names
, "@plt", sizeof ("@plt"));
8574 names
+= sizeof ("@plt");
8581 /* It is only used by x86-64 so far. */
8582 asection _bfd_elf_large_com_section
8583 = BFD_FAKE_SECTION (_bfd_elf_large_com_section
,
8584 SEC_IS_COMMON
, NULL
, "LARGE_COMMON", 0);
8587 _bfd_elf_set_osabi (bfd
* abfd
,
8588 struct bfd_link_info
* link_info ATTRIBUTE_UNUSED
)
8590 Elf_Internal_Ehdr
* i_ehdrp
; /* ELF file header, internal form. */
8592 i_ehdrp
= elf_elfheader (abfd
);
8594 i_ehdrp
->e_ident
[EI_OSABI
] = get_elf_backend_data (abfd
)->elf_osabi
;
8598 /* Return TRUE for ELF symbol types that represent functions.
8599 This is the default version of this function, which is sufficient for
8600 most targets. It returns true if TYPE is STT_FUNC. */
8603 _bfd_elf_is_function_type (unsigned int type
)
8605 return (type
== STT_FUNC
);