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_STACK
: pt
= "STACK"; 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 (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 it's 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
));
2245 sprintf (namebuf
, "%s%d%s", typename
, index
, split
? "a" : "");
2246 len
= strlen (namebuf
) + 1;
2247 name
= bfd_alloc (abfd
, len
);
2250 memcpy (name
, namebuf
, len
);
2251 newsect
= bfd_make_section (abfd
, name
);
2252 if (newsect
== NULL
)
2254 newsect
->vma
= hdr
->p_vaddr
;
2255 newsect
->lma
= hdr
->p_paddr
;
2256 newsect
->size
= hdr
->p_filesz
;
2257 newsect
->filepos
= hdr
->p_offset
;
2258 newsect
->flags
|= SEC_HAS_CONTENTS
;
2259 newsect
->alignment_power
= bfd_log2 (hdr
->p_align
);
2260 if (hdr
->p_type
== PT_LOAD
)
2262 newsect
->flags
|= SEC_ALLOC
;
2263 newsect
->flags
|= SEC_LOAD
;
2264 if (hdr
->p_flags
& PF_X
)
2266 /* FIXME: all we known is that it has execute PERMISSION,
2268 newsect
->flags
|= SEC_CODE
;
2271 if (!(hdr
->p_flags
& PF_W
))
2273 newsect
->flags
|= SEC_READONLY
;
2278 sprintf (namebuf
, "%s%db", typename
, index
);
2279 len
= strlen (namebuf
) + 1;
2280 name
= bfd_alloc (abfd
, len
);
2283 memcpy (name
, namebuf
, len
);
2284 newsect
= bfd_make_section (abfd
, name
);
2285 if (newsect
== NULL
)
2287 newsect
->vma
= hdr
->p_vaddr
+ hdr
->p_filesz
;
2288 newsect
->lma
= hdr
->p_paddr
+ hdr
->p_filesz
;
2289 newsect
->size
= hdr
->p_memsz
- hdr
->p_filesz
;
2290 if (hdr
->p_type
== PT_LOAD
)
2292 newsect
->flags
|= SEC_ALLOC
;
2293 if (hdr
->p_flags
& PF_X
)
2294 newsect
->flags
|= SEC_CODE
;
2296 if (!(hdr
->p_flags
& PF_W
))
2297 newsect
->flags
|= SEC_READONLY
;
2304 bfd_section_from_phdr (bfd
*abfd
, Elf_Internal_Phdr
*hdr
, int index
)
2306 const struct elf_backend_data
*bed
;
2308 switch (hdr
->p_type
)
2311 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "null");
2314 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "load");
2317 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "dynamic");
2320 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "interp");
2323 if (! _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "note"))
2325 if (! elfcore_read_notes (abfd
, hdr
->p_offset
, hdr
->p_filesz
))
2330 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "shlib");
2333 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "phdr");
2335 case PT_GNU_EH_FRAME
:
2336 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
,
2340 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "stack");
2343 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "relro");
2346 /* Check for any processor-specific program segment types. */
2347 bed
= get_elf_backend_data (abfd
);
2348 return bed
->elf_backend_section_from_phdr (abfd
, hdr
, index
, "proc");
2352 /* Initialize REL_HDR, the section-header for new section, containing
2353 relocations against ASECT. If USE_RELA_P is TRUE, we use RELA
2354 relocations; otherwise, we use REL relocations. */
2357 _bfd_elf_init_reloc_shdr (bfd
*abfd
,
2358 Elf_Internal_Shdr
*rel_hdr
,
2360 bfd_boolean use_rela_p
)
2363 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2364 bfd_size_type amt
= sizeof ".rela" + strlen (asect
->name
);
2366 name
= bfd_alloc (abfd
, amt
);
2369 sprintf (name
, "%s%s", use_rela_p
? ".rela" : ".rel", asect
->name
);
2371 (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd
), name
,
2373 if (rel_hdr
->sh_name
== (unsigned int) -1)
2375 rel_hdr
->sh_type
= use_rela_p
? SHT_RELA
: SHT_REL
;
2376 rel_hdr
->sh_entsize
= (use_rela_p
2377 ? bed
->s
->sizeof_rela
2378 : bed
->s
->sizeof_rel
);
2379 rel_hdr
->sh_addralign
= 1 << bed
->s
->log_file_align
;
2380 rel_hdr
->sh_flags
= 0;
2381 rel_hdr
->sh_addr
= 0;
2382 rel_hdr
->sh_size
= 0;
2383 rel_hdr
->sh_offset
= 0;
2388 /* Set up an ELF internal section header for a section. */
2391 elf_fake_sections (bfd
*abfd
, asection
*asect
, void *failedptrarg
)
2393 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2394 bfd_boolean
*failedptr
= failedptrarg
;
2395 Elf_Internal_Shdr
*this_hdr
;
2396 unsigned int sh_type
;
2400 /* We already failed; just get out of the bfd_map_over_sections
2405 this_hdr
= &elf_section_data (asect
)->this_hdr
;
2407 this_hdr
->sh_name
= (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd
),
2408 asect
->name
, FALSE
);
2409 if (this_hdr
->sh_name
== (unsigned int) -1)
2415 /* Don't clear sh_flags. Assembler may set additional bits. */
2417 if ((asect
->flags
& SEC_ALLOC
) != 0
2418 || asect
->user_set_vma
)
2419 this_hdr
->sh_addr
= asect
->vma
;
2421 this_hdr
->sh_addr
= 0;
2423 this_hdr
->sh_offset
= 0;
2424 this_hdr
->sh_size
= asect
->size
;
2425 this_hdr
->sh_link
= 0;
2426 this_hdr
->sh_addralign
= 1 << asect
->alignment_power
;
2427 /* The sh_entsize and sh_info fields may have been set already by
2428 copy_private_section_data. */
2430 this_hdr
->bfd_section
= asect
;
2431 this_hdr
->contents
= NULL
;
2433 /* If the section type is unspecified, we set it based on
2435 if (this_hdr
->sh_type
== SHT_NULL
)
2437 if ((asect
->flags
& SEC_GROUP
) != 0)
2438 this_hdr
->sh_type
= SHT_GROUP
;
2439 else if ((asect
->flags
& SEC_ALLOC
) != 0
2440 && (((asect
->flags
& (SEC_LOAD
| SEC_HAS_CONTENTS
)) == 0)
2441 || (asect
->flags
& SEC_NEVER_LOAD
) != 0))
2442 this_hdr
->sh_type
= SHT_NOBITS
;
2444 this_hdr
->sh_type
= SHT_PROGBITS
;
2447 switch (this_hdr
->sh_type
)
2453 case SHT_INIT_ARRAY
:
2454 case SHT_FINI_ARRAY
:
2455 case SHT_PREINIT_ARRAY
:
2462 this_hdr
->sh_entsize
= bed
->s
->sizeof_hash_entry
;
2466 this_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
2470 this_hdr
->sh_entsize
= bed
->s
->sizeof_dyn
;
2474 if (get_elf_backend_data (abfd
)->may_use_rela_p
)
2475 this_hdr
->sh_entsize
= bed
->s
->sizeof_rela
;
2479 if (get_elf_backend_data (abfd
)->may_use_rel_p
)
2480 this_hdr
->sh_entsize
= bed
->s
->sizeof_rel
;
2483 case SHT_GNU_versym
:
2484 this_hdr
->sh_entsize
= sizeof (Elf_External_Versym
);
2487 case SHT_GNU_verdef
:
2488 this_hdr
->sh_entsize
= 0;
2489 /* objcopy or strip will copy over sh_info, but may not set
2490 cverdefs. The linker will set cverdefs, but sh_info will be
2492 if (this_hdr
->sh_info
== 0)
2493 this_hdr
->sh_info
= elf_tdata (abfd
)->cverdefs
;
2495 BFD_ASSERT (elf_tdata (abfd
)->cverdefs
== 0
2496 || this_hdr
->sh_info
== elf_tdata (abfd
)->cverdefs
);
2499 case SHT_GNU_verneed
:
2500 this_hdr
->sh_entsize
= 0;
2501 /* objcopy or strip will copy over sh_info, but may not set
2502 cverrefs. The linker will set cverrefs, but sh_info will be
2504 if (this_hdr
->sh_info
== 0)
2505 this_hdr
->sh_info
= elf_tdata (abfd
)->cverrefs
;
2507 BFD_ASSERT (elf_tdata (abfd
)->cverrefs
== 0
2508 || this_hdr
->sh_info
== elf_tdata (abfd
)->cverrefs
);
2512 this_hdr
->sh_entsize
= GRP_ENTRY_SIZE
;
2516 this_hdr
->sh_entsize
= bed
->s
->arch_size
== 64 ? 0 : 4;
2520 if ((asect
->flags
& SEC_ALLOC
) != 0)
2521 this_hdr
->sh_flags
|= SHF_ALLOC
;
2522 if ((asect
->flags
& SEC_READONLY
) == 0)
2523 this_hdr
->sh_flags
|= SHF_WRITE
;
2524 if ((asect
->flags
& SEC_CODE
) != 0)
2525 this_hdr
->sh_flags
|= SHF_EXECINSTR
;
2526 if ((asect
->flags
& SEC_MERGE
) != 0)
2528 this_hdr
->sh_flags
|= SHF_MERGE
;
2529 this_hdr
->sh_entsize
= asect
->entsize
;
2530 if ((asect
->flags
& SEC_STRINGS
) != 0)
2531 this_hdr
->sh_flags
|= SHF_STRINGS
;
2533 if ((asect
->flags
& SEC_GROUP
) == 0 && elf_group_name (asect
) != NULL
)
2534 this_hdr
->sh_flags
|= SHF_GROUP
;
2535 if ((asect
->flags
& SEC_THREAD_LOCAL
) != 0)
2537 this_hdr
->sh_flags
|= SHF_TLS
;
2538 if (asect
->size
== 0
2539 && (asect
->flags
& SEC_HAS_CONTENTS
) == 0)
2541 struct bfd_link_order
*o
= asect
->map_tail
.link_order
;
2543 this_hdr
->sh_size
= 0;
2546 this_hdr
->sh_size
= o
->offset
+ o
->size
;
2547 if (this_hdr
->sh_size
!= 0)
2548 this_hdr
->sh_type
= SHT_NOBITS
;
2553 /* Check for processor-specific section types. */
2554 sh_type
= this_hdr
->sh_type
;
2555 if (bed
->elf_backend_fake_sections
2556 && !(*bed
->elf_backend_fake_sections
) (abfd
, this_hdr
, asect
))
2559 if (sh_type
== SHT_NOBITS
&& asect
->size
!= 0)
2561 /* Don't change the header type from NOBITS if we are being
2562 called for objcopy --only-keep-debug. */
2563 this_hdr
->sh_type
= sh_type
;
2566 /* If the section has relocs, set up a section header for the
2567 SHT_REL[A] section. If two relocation sections are required for
2568 this section, it is up to the processor-specific back-end to
2569 create the other. */
2570 if ((asect
->flags
& SEC_RELOC
) != 0
2571 && !_bfd_elf_init_reloc_shdr (abfd
,
2572 &elf_section_data (asect
)->rel_hdr
,
2578 /* Fill in the contents of a SHT_GROUP section. */
2581 bfd_elf_set_group_contents (bfd
*abfd
, asection
*sec
, void *failedptrarg
)
2583 bfd_boolean
*failedptr
= failedptrarg
;
2584 unsigned long symindx
;
2585 asection
*elt
, *first
;
2589 /* Ignore linker created group section. See elfNN_ia64_object_p in
2591 if (((sec
->flags
& (SEC_GROUP
| SEC_LINKER_CREATED
)) != SEC_GROUP
)
2596 if (elf_group_id (sec
) != NULL
)
2597 symindx
= elf_group_id (sec
)->udata
.i
;
2601 /* If called from the assembler, swap_out_syms will have set up
2602 elf_section_syms; If called for "ld -r", use target_index. */
2603 if (elf_section_syms (abfd
) != NULL
)
2604 symindx
= elf_section_syms (abfd
)[sec
->index
]->udata
.i
;
2606 symindx
= sec
->target_index
;
2608 elf_section_data (sec
)->this_hdr
.sh_info
= symindx
;
2610 /* The contents won't be allocated for "ld -r" or objcopy. */
2612 if (sec
->contents
== NULL
)
2615 sec
->contents
= bfd_alloc (abfd
, sec
->size
);
2617 /* Arrange for the section to be written out. */
2618 elf_section_data (sec
)->this_hdr
.contents
= sec
->contents
;
2619 if (sec
->contents
== NULL
)
2626 loc
= sec
->contents
+ sec
->size
;
2628 /* Get the pointer to the first section in the group that gas
2629 squirreled away here. objcopy arranges for this to be set to the
2630 start of the input section group. */
2631 first
= elt
= elf_next_in_group (sec
);
2633 /* First element is a flag word. Rest of section is elf section
2634 indices for all the sections of the group. Write them backwards
2635 just to keep the group in the same order as given in .section
2636 directives, not that it matters. */
2645 s
= s
->output_section
;
2648 idx
= elf_section_data (s
)->this_idx
;
2649 H_PUT_32 (abfd
, idx
, loc
);
2650 elt
= elf_next_in_group (elt
);
2655 if ((loc
-= 4) != sec
->contents
)
2658 H_PUT_32 (abfd
, sec
->flags
& SEC_LINK_ONCE
? GRP_COMDAT
: 0, loc
);
2661 /* Assign all ELF section numbers. The dummy first section is handled here
2662 too. The link/info pointers for the standard section types are filled
2663 in here too, while we're at it. */
2666 assign_section_numbers (bfd
*abfd
, struct bfd_link_info
*link_info
)
2668 struct elf_obj_tdata
*t
= elf_tdata (abfd
);
2670 unsigned int section_number
, secn
;
2671 Elf_Internal_Shdr
**i_shdrp
;
2672 struct bfd_elf_section_data
*d
;
2676 _bfd_elf_strtab_clear_all_refs (elf_shstrtab (abfd
));
2678 /* SHT_GROUP sections are in relocatable files only. */
2679 if (link_info
== NULL
|| link_info
->relocatable
)
2681 /* Put SHT_GROUP sections first. */
2682 for (sec
= abfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
2684 d
= elf_section_data (sec
);
2686 if (d
->this_hdr
.sh_type
== SHT_GROUP
)
2688 if (sec
->flags
& SEC_LINKER_CREATED
)
2690 /* Remove the linker created SHT_GROUP sections. */
2691 bfd_section_list_remove (abfd
, sec
);
2692 abfd
->section_count
--;
2696 if (section_number
== SHN_LORESERVE
)
2697 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2698 d
->this_idx
= section_number
++;
2704 for (sec
= abfd
->sections
; sec
; sec
= sec
->next
)
2706 d
= elf_section_data (sec
);
2708 if (d
->this_hdr
.sh_type
!= SHT_GROUP
)
2710 if (section_number
== SHN_LORESERVE
)
2711 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2712 d
->this_idx
= section_number
++;
2714 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->this_hdr
.sh_name
);
2715 if ((sec
->flags
& SEC_RELOC
) == 0)
2719 if (section_number
== SHN_LORESERVE
)
2720 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2721 d
->rel_idx
= section_number
++;
2722 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->rel_hdr
.sh_name
);
2727 if (section_number
== SHN_LORESERVE
)
2728 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2729 d
->rel_idx2
= section_number
++;
2730 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->rel_hdr2
->sh_name
);
2736 if (section_number
== SHN_LORESERVE
)
2737 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2738 t
->shstrtab_section
= section_number
++;
2739 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->shstrtab_hdr
.sh_name
);
2740 elf_elfheader (abfd
)->e_shstrndx
= t
->shstrtab_section
;
2742 if (bfd_get_symcount (abfd
) > 0)
2744 if (section_number
== SHN_LORESERVE
)
2745 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2746 t
->symtab_section
= section_number
++;
2747 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->symtab_hdr
.sh_name
);
2748 if (section_number
> SHN_LORESERVE
- 2)
2750 if (section_number
== SHN_LORESERVE
)
2751 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2752 t
->symtab_shndx_section
= section_number
++;
2753 t
->symtab_shndx_hdr
.sh_name
2754 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd
),
2755 ".symtab_shndx", FALSE
);
2756 if (t
->symtab_shndx_hdr
.sh_name
== (unsigned int) -1)
2759 if (section_number
== SHN_LORESERVE
)
2760 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2761 t
->strtab_section
= section_number
++;
2762 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->strtab_hdr
.sh_name
);
2765 _bfd_elf_strtab_finalize (elf_shstrtab (abfd
));
2766 t
->shstrtab_hdr
.sh_size
= _bfd_elf_strtab_size (elf_shstrtab (abfd
));
2768 elf_numsections (abfd
) = section_number
;
2769 elf_elfheader (abfd
)->e_shnum
= section_number
;
2770 if (section_number
> SHN_LORESERVE
)
2771 elf_elfheader (abfd
)->e_shnum
-= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2773 /* Set up the list of section header pointers, in agreement with the
2775 i_shdrp
= bfd_zalloc2 (abfd
, section_number
, sizeof (Elf_Internal_Shdr
*));
2776 if (i_shdrp
== NULL
)
2779 i_shdrp
[0] = bfd_zalloc (abfd
, sizeof (Elf_Internal_Shdr
));
2780 if (i_shdrp
[0] == NULL
)
2782 bfd_release (abfd
, i_shdrp
);
2786 elf_elfsections (abfd
) = i_shdrp
;
2788 i_shdrp
[t
->shstrtab_section
] = &t
->shstrtab_hdr
;
2789 if (bfd_get_symcount (abfd
) > 0)
2791 i_shdrp
[t
->symtab_section
] = &t
->symtab_hdr
;
2792 if (elf_numsections (abfd
) > SHN_LORESERVE
)
2794 i_shdrp
[t
->symtab_shndx_section
] = &t
->symtab_shndx_hdr
;
2795 t
->symtab_shndx_hdr
.sh_link
= t
->symtab_section
;
2797 i_shdrp
[t
->strtab_section
] = &t
->strtab_hdr
;
2798 t
->symtab_hdr
.sh_link
= t
->strtab_section
;
2801 for (sec
= abfd
->sections
; sec
; sec
= sec
->next
)
2803 struct bfd_elf_section_data
*d
= elf_section_data (sec
);
2807 i_shdrp
[d
->this_idx
] = &d
->this_hdr
;
2808 if (d
->rel_idx
!= 0)
2809 i_shdrp
[d
->rel_idx
] = &d
->rel_hdr
;
2810 if (d
->rel_idx2
!= 0)
2811 i_shdrp
[d
->rel_idx2
] = d
->rel_hdr2
;
2813 /* Fill in the sh_link and sh_info fields while we're at it. */
2815 /* sh_link of a reloc section is the section index of the symbol
2816 table. sh_info is the section index of the section to which
2817 the relocation entries apply. */
2818 if (d
->rel_idx
!= 0)
2820 d
->rel_hdr
.sh_link
= t
->symtab_section
;
2821 d
->rel_hdr
.sh_info
= d
->this_idx
;
2823 if (d
->rel_idx2
!= 0)
2825 d
->rel_hdr2
->sh_link
= t
->symtab_section
;
2826 d
->rel_hdr2
->sh_info
= d
->this_idx
;
2829 /* We need to set up sh_link for SHF_LINK_ORDER. */
2830 if ((d
->this_hdr
.sh_flags
& SHF_LINK_ORDER
) != 0)
2832 s
= elf_linked_to_section (sec
);
2835 /* elf_linked_to_section points to the input section. */
2836 if (link_info
!= NULL
)
2838 /* Check discarded linkonce section. */
2839 if (elf_discarded_section (s
))
2842 (*_bfd_error_handler
)
2843 (_("%B: sh_link of section `%A' points to discarded section `%A' of `%B'"),
2844 abfd
, d
->this_hdr
.bfd_section
,
2846 /* Point to the kept section if it has the same
2847 size as the discarded one. */
2848 kept
= _bfd_elf_check_kept_section (s
, link_info
);
2851 bfd_set_error (bfd_error_bad_value
);
2857 s
= s
->output_section
;
2858 BFD_ASSERT (s
!= NULL
);
2862 /* Handle objcopy. */
2863 if (s
->output_section
== NULL
)
2865 (*_bfd_error_handler
)
2866 (_("%B: sh_link of section `%A' points to removed section `%A' of `%B'"),
2867 abfd
, d
->this_hdr
.bfd_section
, s
, s
->owner
);
2868 bfd_set_error (bfd_error_bad_value
);
2871 s
= s
->output_section
;
2873 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
2878 The Intel C compiler generates SHT_IA_64_UNWIND with
2879 SHF_LINK_ORDER. But it doesn't set the sh_link or
2880 sh_info fields. Hence we could get the situation
2882 const struct elf_backend_data
*bed
2883 = get_elf_backend_data (abfd
);
2884 if (bed
->link_order_error_handler
)
2885 bed
->link_order_error_handler
2886 (_("%B: warning: sh_link not set for section `%A'"),
2891 switch (d
->this_hdr
.sh_type
)
2895 /* A reloc section which we are treating as a normal BFD
2896 section. sh_link is the section index of the symbol
2897 table. sh_info is the section index of the section to
2898 which the relocation entries apply. We assume that an
2899 allocated reloc section uses the dynamic symbol table.
2900 FIXME: How can we be sure? */
2901 s
= bfd_get_section_by_name (abfd
, ".dynsym");
2903 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
2905 /* We look up the section the relocs apply to by name. */
2907 if (d
->this_hdr
.sh_type
== SHT_REL
)
2911 s
= bfd_get_section_by_name (abfd
, name
);
2913 d
->this_hdr
.sh_info
= elf_section_data (s
)->this_idx
;
2917 /* We assume that a section named .stab*str is a stabs
2918 string section. We look for a section with the same name
2919 but without the trailing ``str'', and set its sh_link
2920 field to point to this section. */
2921 if (CONST_STRNEQ (sec
->name
, ".stab")
2922 && strcmp (sec
->name
+ strlen (sec
->name
) - 3, "str") == 0)
2927 len
= strlen (sec
->name
);
2928 alc
= bfd_malloc (len
- 2);
2931 memcpy (alc
, sec
->name
, len
- 3);
2932 alc
[len
- 3] = '\0';
2933 s
= bfd_get_section_by_name (abfd
, alc
);
2937 elf_section_data (s
)->this_hdr
.sh_link
= d
->this_idx
;
2939 /* This is a .stab section. */
2940 if (elf_section_data (s
)->this_hdr
.sh_entsize
== 0)
2941 elf_section_data (s
)->this_hdr
.sh_entsize
2942 = 4 + 2 * bfd_get_arch_size (abfd
) / 8;
2949 case SHT_GNU_verneed
:
2950 case SHT_GNU_verdef
:
2951 /* sh_link is the section header index of the string table
2952 used for the dynamic entries, or the symbol table, or the
2954 s
= bfd_get_section_by_name (abfd
, ".dynstr");
2956 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
2959 case SHT_GNU_LIBLIST
:
2960 /* sh_link is the section header index of the prelink library
2961 list used for the dynamic entries, or the symbol table, or
2962 the version strings. */
2963 s
= bfd_get_section_by_name (abfd
, (sec
->flags
& SEC_ALLOC
)
2964 ? ".dynstr" : ".gnu.libstr");
2966 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
2971 case SHT_GNU_versym
:
2972 /* sh_link is the section header index of the symbol table
2973 this hash table or version table is for. */
2974 s
= bfd_get_section_by_name (abfd
, ".dynsym");
2976 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
2980 d
->this_hdr
.sh_link
= t
->symtab_section
;
2984 for (secn
= 1; secn
< section_number
; ++secn
)
2985 if (i_shdrp
[secn
] == NULL
)
2986 i_shdrp
[secn
] = i_shdrp
[0];
2988 i_shdrp
[secn
]->sh_name
= _bfd_elf_strtab_offset (elf_shstrtab (abfd
),
2989 i_shdrp
[secn
]->sh_name
);
2993 /* Map symbol from it's internal number to the external number, moving
2994 all local symbols to be at the head of the list. */
2997 sym_is_global (bfd
*abfd
, asymbol
*sym
)
2999 /* If the backend has a special mapping, use it. */
3000 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3001 if (bed
->elf_backend_sym_is_global
)
3002 return (*bed
->elf_backend_sym_is_global
) (abfd
, sym
);
3004 return ((sym
->flags
& (BSF_GLOBAL
| BSF_WEAK
)) != 0
3005 || bfd_is_und_section (bfd_get_section (sym
))
3006 || bfd_is_com_section (bfd_get_section (sym
)));
3009 /* Don't output section symbols for sections that are not going to be
3010 output. Also, don't output section symbols for reloc and other
3011 special sections. */
3014 ignore_section_sym (bfd
*abfd
, asymbol
*sym
)
3016 return ((sym
->flags
& BSF_SECTION_SYM
) != 0
3018 || (sym
->section
->owner
!= abfd
3019 && (sym
->section
->output_section
->owner
!= abfd
3020 || sym
->section
->output_offset
!= 0))));
3024 elf_map_symbols (bfd
*abfd
)
3026 unsigned int symcount
= bfd_get_symcount (abfd
);
3027 asymbol
**syms
= bfd_get_outsymbols (abfd
);
3028 asymbol
**sect_syms
;
3029 unsigned int num_locals
= 0;
3030 unsigned int num_globals
= 0;
3031 unsigned int num_locals2
= 0;
3032 unsigned int num_globals2
= 0;
3039 fprintf (stderr
, "elf_map_symbols\n");
3043 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
3045 if (max_index
< asect
->index
)
3046 max_index
= asect
->index
;
3050 sect_syms
= bfd_zalloc2 (abfd
, max_index
, sizeof (asymbol
*));
3051 if (sect_syms
== NULL
)
3053 elf_section_syms (abfd
) = sect_syms
;
3054 elf_num_section_syms (abfd
) = max_index
;
3056 /* Init sect_syms entries for any section symbols we have already
3057 decided to output. */
3058 for (idx
= 0; idx
< symcount
; idx
++)
3060 asymbol
*sym
= syms
[idx
];
3062 if ((sym
->flags
& BSF_SECTION_SYM
) != 0
3063 && !ignore_section_sym (abfd
, sym
))
3065 asection
*sec
= sym
->section
;
3067 if (sec
->owner
!= abfd
)
3068 sec
= sec
->output_section
;
3070 sect_syms
[sec
->index
] = syms
[idx
];
3074 /* Classify all of the symbols. */
3075 for (idx
= 0; idx
< symcount
; idx
++)
3077 if (ignore_section_sym (abfd
, syms
[idx
]))
3079 if (!sym_is_global (abfd
, syms
[idx
]))
3085 /* We will be adding a section symbol for each normal BFD section. Most
3086 sections will already have a section symbol in outsymbols, but
3087 eg. SHT_GROUP sections will not, and we need the section symbol mapped
3088 at least in that case. */
3089 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
3091 if (sect_syms
[asect
->index
] == NULL
)
3093 if (!sym_is_global (abfd
, asect
->symbol
))
3100 /* Now sort the symbols so the local symbols are first. */
3101 new_syms
= bfd_alloc2 (abfd
, num_locals
+ num_globals
, sizeof (asymbol
*));
3103 if (new_syms
== NULL
)
3106 for (idx
= 0; idx
< symcount
; idx
++)
3108 asymbol
*sym
= syms
[idx
];
3111 if (ignore_section_sym (abfd
, sym
))
3113 if (!sym_is_global (abfd
, sym
))
3116 i
= num_locals
+ num_globals2
++;
3118 sym
->udata
.i
= i
+ 1;
3120 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
3122 if (sect_syms
[asect
->index
] == NULL
)
3124 asymbol
*sym
= asect
->symbol
;
3127 sect_syms
[asect
->index
] = sym
;
3128 if (!sym_is_global (abfd
, sym
))
3131 i
= num_locals
+ num_globals2
++;
3133 sym
->udata
.i
= i
+ 1;
3137 bfd_set_symtab (abfd
, new_syms
, num_locals
+ num_globals
);
3139 elf_num_locals (abfd
) = num_locals
;
3140 elf_num_globals (abfd
) = num_globals
;
3144 /* Align to the maximum file alignment that could be required for any
3145 ELF data structure. */
3147 static inline file_ptr
3148 align_file_position (file_ptr off
, int align
)
3150 return (off
+ align
- 1) & ~(align
- 1);
3153 /* Assign a file position to a section, optionally aligning to the
3154 required section alignment. */
3157 _bfd_elf_assign_file_position_for_section (Elf_Internal_Shdr
*i_shdrp
,
3165 al
= i_shdrp
->sh_addralign
;
3167 offset
= BFD_ALIGN (offset
, al
);
3169 i_shdrp
->sh_offset
= offset
;
3170 if (i_shdrp
->bfd_section
!= NULL
)
3171 i_shdrp
->bfd_section
->filepos
= offset
;
3172 if (i_shdrp
->sh_type
!= SHT_NOBITS
)
3173 offset
+= i_shdrp
->sh_size
;
3177 /* Compute the file positions we are going to put the sections at, and
3178 otherwise prepare to begin writing out the ELF file. If LINK_INFO
3179 is not NULL, this is being called by the ELF backend linker. */
3182 _bfd_elf_compute_section_file_positions (bfd
*abfd
,
3183 struct bfd_link_info
*link_info
)
3185 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3187 struct bfd_strtab_hash
*strtab
= NULL
;
3188 Elf_Internal_Shdr
*shstrtab_hdr
;
3190 if (abfd
->output_has_begun
)
3193 /* Do any elf backend specific processing first. */
3194 if (bed
->elf_backend_begin_write_processing
)
3195 (*bed
->elf_backend_begin_write_processing
) (abfd
, link_info
);
3197 if (! prep_headers (abfd
))
3200 /* Post process the headers if necessary. */
3201 if (bed
->elf_backend_post_process_headers
)
3202 (*bed
->elf_backend_post_process_headers
) (abfd
, link_info
);
3205 bfd_map_over_sections (abfd
, elf_fake_sections
, &failed
);
3209 if (!assign_section_numbers (abfd
, link_info
))
3212 /* The backend linker builds symbol table information itself. */
3213 if (link_info
== NULL
&& bfd_get_symcount (abfd
) > 0)
3215 /* Non-zero if doing a relocatable link. */
3216 int relocatable_p
= ! (abfd
->flags
& (EXEC_P
| DYNAMIC
));
3218 if (! swap_out_syms (abfd
, &strtab
, relocatable_p
))
3222 if (link_info
== NULL
)
3224 bfd_map_over_sections (abfd
, bfd_elf_set_group_contents
, &failed
);
3229 shstrtab_hdr
= &elf_tdata (abfd
)->shstrtab_hdr
;
3230 /* sh_name was set in prep_headers. */
3231 shstrtab_hdr
->sh_type
= SHT_STRTAB
;
3232 shstrtab_hdr
->sh_flags
= 0;
3233 shstrtab_hdr
->sh_addr
= 0;
3234 shstrtab_hdr
->sh_size
= _bfd_elf_strtab_size (elf_shstrtab (abfd
));
3235 shstrtab_hdr
->sh_entsize
= 0;
3236 shstrtab_hdr
->sh_link
= 0;
3237 shstrtab_hdr
->sh_info
= 0;
3238 /* sh_offset is set in assign_file_positions_except_relocs. */
3239 shstrtab_hdr
->sh_addralign
= 1;
3241 if (!assign_file_positions_except_relocs (abfd
, link_info
))
3244 if (link_info
== NULL
&& bfd_get_symcount (abfd
) > 0)
3247 Elf_Internal_Shdr
*hdr
;
3249 off
= elf_tdata (abfd
)->next_file_pos
;
3251 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
3252 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
3254 hdr
= &elf_tdata (abfd
)->symtab_shndx_hdr
;
3255 if (hdr
->sh_size
!= 0)
3256 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
3258 hdr
= &elf_tdata (abfd
)->strtab_hdr
;
3259 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
3261 elf_tdata (abfd
)->next_file_pos
= off
;
3263 /* Now that we know where the .strtab section goes, write it
3265 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
3266 || ! _bfd_stringtab_emit (abfd
, strtab
))
3268 _bfd_stringtab_free (strtab
);
3271 abfd
->output_has_begun
= TRUE
;
3276 /* Make an initial estimate of the size of the program header. If we
3277 get the number wrong here, we'll redo section placement. */
3279 static bfd_size_type
3280 get_program_header_size (bfd
*abfd
, struct bfd_link_info
*info
)
3284 const struct elf_backend_data
*bed
;
3286 /* Assume we will need exactly two PT_LOAD segments: one for text
3287 and one for data. */
3290 s
= bfd_get_section_by_name (abfd
, ".interp");
3291 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0)
3293 /* If we have a loadable interpreter section, we need a
3294 PT_INTERP segment. In this case, assume we also need a
3295 PT_PHDR segment, although that may not be true for all
3300 if (bfd_get_section_by_name (abfd
, ".dynamic") != NULL
)
3302 /* We need a PT_DYNAMIC segment. */
3305 if (elf_tdata (abfd
)->relro
)
3307 /* We need a PT_GNU_RELRO segment only when there is a
3308 PT_DYNAMIC segment. */
3313 if (elf_tdata (abfd
)->eh_frame_hdr
)
3315 /* We need a PT_GNU_EH_FRAME segment. */
3319 if (elf_tdata (abfd
)->stack_flags
)
3321 /* We need a PT_GNU_STACK segment. */
3325 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
3327 if ((s
->flags
& SEC_LOAD
) != 0
3328 && CONST_STRNEQ (s
->name
, ".note"))
3330 /* We need a PT_NOTE segment. */
3332 /* Try to create just one PT_NOTE segment
3333 for all adjacent loadable .note* sections.
3334 gABI requires that within a PT_NOTE segment
3335 (and also inside of each SHT_NOTE section)
3336 each note is padded to a multiple of 4 size,
3337 so we check whether the sections are correctly
3339 if (s
->alignment_power
== 2)
3340 while (s
->next
!= NULL
3341 && s
->next
->alignment_power
== 2
3342 && (s
->next
->flags
& SEC_LOAD
) != 0
3343 && CONST_STRNEQ (s
->next
->name
, ".note"))
3348 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
3350 if (s
->flags
& SEC_THREAD_LOCAL
)
3352 /* We need a PT_TLS segment. */
3358 /* Let the backend count up any program headers it might need. */
3359 bed
= get_elf_backend_data (abfd
);
3360 if (bed
->elf_backend_additional_program_headers
)
3364 a
= (*bed
->elf_backend_additional_program_headers
) (abfd
, info
);
3370 return segs
* bed
->s
->sizeof_phdr
;
3373 /* Create a mapping from a set of sections to a program segment. */
3375 static struct elf_segment_map
*
3376 make_mapping (bfd
*abfd
,
3377 asection
**sections
,
3382 struct elf_segment_map
*m
;
3387 amt
= sizeof (struct elf_segment_map
);
3388 amt
+= (to
- from
- 1) * sizeof (asection
*);
3389 m
= bfd_zalloc (abfd
, amt
);
3393 m
->p_type
= PT_LOAD
;
3394 for (i
= from
, hdrpp
= sections
+ from
; i
< to
; i
++, hdrpp
++)
3395 m
->sections
[i
- from
] = *hdrpp
;
3396 m
->count
= to
- from
;
3398 if (from
== 0 && phdr
)
3400 /* Include the headers in the first PT_LOAD segment. */
3401 m
->includes_filehdr
= 1;
3402 m
->includes_phdrs
= 1;
3408 /* Create the PT_DYNAMIC segment, which includes DYNSEC. Returns NULL
3411 struct elf_segment_map
*
3412 _bfd_elf_make_dynamic_segment (bfd
*abfd
, asection
*dynsec
)
3414 struct elf_segment_map
*m
;
3416 m
= bfd_zalloc (abfd
, sizeof (struct elf_segment_map
));
3420 m
->p_type
= PT_DYNAMIC
;
3422 m
->sections
[0] = dynsec
;
3427 /* Possibly add or remove segments from the segment map. */
3430 elf_modify_segment_map (bfd
*abfd
, struct bfd_link_info
*info
)
3432 struct elf_segment_map
**m
;
3433 const struct elf_backend_data
*bed
;
3435 /* The placement algorithm assumes that non allocated sections are
3436 not in PT_LOAD segments. We ensure this here by removing such
3437 sections from the segment map. We also remove excluded
3438 sections. Finally, any PT_LOAD segment without sections is
3440 m
= &elf_tdata (abfd
)->segment_map
;
3443 unsigned int i
, new_count
;
3445 for (new_count
= 0, i
= 0; i
< (*m
)->count
; i
++)
3447 if (((*m
)->sections
[i
]->flags
& SEC_EXCLUDE
) == 0
3448 && (((*m
)->sections
[i
]->flags
& SEC_ALLOC
) != 0
3449 || (*m
)->p_type
!= PT_LOAD
))
3451 (*m
)->sections
[new_count
] = (*m
)->sections
[i
];
3455 (*m
)->count
= new_count
;
3457 if ((*m
)->p_type
== PT_LOAD
&& (*m
)->count
== 0)
3463 bed
= get_elf_backend_data (abfd
);
3464 if (bed
->elf_backend_modify_segment_map
!= NULL
)
3466 if (!(*bed
->elf_backend_modify_segment_map
) (abfd
, info
))
3473 /* Set up a mapping from BFD sections to program segments. */
3476 _bfd_elf_map_sections_to_segments (bfd
*abfd
, struct bfd_link_info
*info
)
3479 struct elf_segment_map
*m
;
3480 asection
**sections
= NULL
;
3481 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3483 if (elf_tdata (abfd
)->segment_map
== NULL
3484 && bfd_count_sections (abfd
) != 0)
3488 struct elf_segment_map
*mfirst
;
3489 struct elf_segment_map
**pm
;
3492 unsigned int phdr_index
;
3493 bfd_vma maxpagesize
;
3495 bfd_boolean phdr_in_segment
= TRUE
;
3496 bfd_boolean writable
;
3498 asection
*first_tls
= NULL
;
3499 asection
*dynsec
, *eh_frame_hdr
;
3502 /* Select the allocated sections, and sort them. */
3504 sections
= bfd_malloc2 (bfd_count_sections (abfd
), sizeof (asection
*));
3505 if (sections
== NULL
)
3509 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
3511 if ((s
->flags
& SEC_ALLOC
) != 0)
3517 BFD_ASSERT (i
<= bfd_count_sections (abfd
));
3520 qsort (sections
, (size_t) count
, sizeof (asection
*), elf_sort_sections
);
3522 /* Build the mapping. */
3527 /* If we have a .interp section, then create a PT_PHDR segment for
3528 the program headers and a PT_INTERP segment for the .interp
3530 s
= bfd_get_section_by_name (abfd
, ".interp");
3531 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0)
3533 amt
= sizeof (struct elf_segment_map
);
3534 m
= bfd_zalloc (abfd
, amt
);
3538 m
->p_type
= PT_PHDR
;
3539 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
3540 m
->p_flags
= PF_R
| PF_X
;
3541 m
->p_flags_valid
= 1;
3542 m
->includes_phdrs
= 1;
3547 amt
= sizeof (struct elf_segment_map
);
3548 m
= bfd_zalloc (abfd
, amt
);
3552 m
->p_type
= PT_INTERP
;
3560 /* Look through the sections. We put sections in the same program
3561 segment when the start of the second section can be placed within
3562 a few bytes of the end of the first section. */
3566 maxpagesize
= bed
->maxpagesize
;
3568 dynsec
= bfd_get_section_by_name (abfd
, ".dynamic");
3570 && (dynsec
->flags
& SEC_LOAD
) == 0)
3573 /* Deal with -Ttext or something similar such that the first section
3574 is not adjacent to the program headers. This is an
3575 approximation, since at this point we don't know exactly how many
3576 program headers we will need. */
3579 bfd_size_type phdr_size
= elf_tdata (abfd
)->program_header_size
;
3581 if (phdr_size
== (bfd_size_type
) -1)
3582 phdr_size
= get_program_header_size (abfd
, info
);
3583 if ((abfd
->flags
& D_PAGED
) == 0
3584 || sections
[0]->lma
< phdr_size
3585 || sections
[0]->lma
% maxpagesize
< phdr_size
% maxpagesize
)
3586 phdr_in_segment
= FALSE
;
3589 for (i
= 0, hdrpp
= sections
; i
< count
; i
++, hdrpp
++)
3592 bfd_boolean new_segment
;
3596 /* See if this section and the last one will fit in the same
3599 if (last_hdr
== NULL
)
3601 /* If we don't have a segment yet, then we don't need a new
3602 one (we build the last one after this loop). */
3603 new_segment
= FALSE
;
3605 else if (last_hdr
->lma
- last_hdr
->vma
!= hdr
->lma
- hdr
->vma
)
3607 /* If this section has a different relation between the
3608 virtual address and the load address, then we need a new
3612 else if (BFD_ALIGN (last_hdr
->lma
+ last_size
, maxpagesize
)
3613 < BFD_ALIGN (hdr
->lma
, maxpagesize
))
3615 /* If putting this section in this segment would force us to
3616 skip a page in the segment, then we need a new segment. */
3619 else if ((last_hdr
->flags
& (SEC_LOAD
| SEC_THREAD_LOCAL
)) == 0
3620 && (hdr
->flags
& (SEC_LOAD
| SEC_THREAD_LOCAL
)) != 0)
3622 /* We don't want to put a loadable section after a
3623 nonloadable section in the same segment.
3624 Consider .tbss sections as loadable for this purpose. */
3627 else if ((abfd
->flags
& D_PAGED
) == 0)
3629 /* If the file is not demand paged, which means that we
3630 don't require the sections to be correctly aligned in the
3631 file, then there is no other reason for a new segment. */
3632 new_segment
= FALSE
;
3635 && (hdr
->flags
& SEC_READONLY
) == 0
3636 && (((last_hdr
->lma
+ last_size
- 1)
3637 & ~(maxpagesize
- 1))
3638 != (hdr
->lma
& ~(maxpagesize
- 1))))
3640 /* We don't want to put a writable section in a read only
3641 segment, unless they are on the same page in memory
3642 anyhow. We already know that the last section does not
3643 bring us past the current section on the page, so the
3644 only case in which the new section is not on the same
3645 page as the previous section is when the previous section
3646 ends precisely on a page boundary. */
3651 /* Otherwise, we can use the same segment. */
3652 new_segment
= FALSE
;
3655 /* Allow interested parties a chance to override our decision. */
3656 if (last_hdr
&& info
->callbacks
->override_segment_assignment
)
3657 new_segment
= info
->callbacks
->override_segment_assignment (info
, abfd
, hdr
, last_hdr
, new_segment
);
3661 if ((hdr
->flags
& SEC_READONLY
) == 0)
3664 /* .tbss sections effectively have zero size. */
3665 if ((hdr
->flags
& (SEC_THREAD_LOCAL
| SEC_LOAD
))
3666 != SEC_THREAD_LOCAL
)
3667 last_size
= hdr
->size
;
3673 /* We need a new program segment. We must create a new program
3674 header holding all the sections from phdr_index until hdr. */
3676 m
= make_mapping (abfd
, sections
, phdr_index
, i
, phdr_in_segment
);
3683 if ((hdr
->flags
& SEC_READONLY
) == 0)
3689 /* .tbss sections effectively have zero size. */
3690 if ((hdr
->flags
& (SEC_THREAD_LOCAL
| SEC_LOAD
)) != SEC_THREAD_LOCAL
)
3691 last_size
= hdr
->size
;
3695 phdr_in_segment
= FALSE
;
3698 /* Create a final PT_LOAD program segment. */
3699 if (last_hdr
!= NULL
)
3701 m
= make_mapping (abfd
, sections
, phdr_index
, i
, phdr_in_segment
);
3709 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
3712 m
= _bfd_elf_make_dynamic_segment (abfd
, dynsec
);
3719 /* For each batch of consecutive loadable .note sections,
3720 add a PT_NOTE segment. We don't use bfd_get_section_by_name,
3721 because if we link together nonloadable .note sections and
3722 loadable .note sections, we will generate two .note sections
3723 in the output file. FIXME: Using names for section types is
3725 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
3727 if ((s
->flags
& SEC_LOAD
) != 0
3728 && CONST_STRNEQ (s
->name
, ".note"))
3732 amt
= sizeof (struct elf_segment_map
);
3733 if (s
->alignment_power
== 2)
3734 for (s2
= s
; s2
->next
!= NULL
; s2
= s2
->next
)
3735 if (s2
->next
->alignment_power
== 2
3736 && (s2
->next
->flags
& SEC_LOAD
) != 0
3737 && CONST_STRNEQ (s2
->next
->name
, ".note")
3738 && align_power (s2
->vma
+ s2
->size
, 2) == s2
->next
->vma
)
3742 amt
+= (count
- 1) * sizeof (asection
*);
3743 m
= bfd_zalloc (abfd
, amt
);
3747 m
->p_type
= PT_NOTE
;
3751 m
->sections
[m
->count
- count
--] = s
;
3752 BFD_ASSERT ((s
->flags
& SEC_THREAD_LOCAL
) == 0);
3755 m
->sections
[m
->count
- 1] = s
;
3756 BFD_ASSERT ((s
->flags
& SEC_THREAD_LOCAL
) == 0);
3760 if (s
->flags
& SEC_THREAD_LOCAL
)
3768 /* If there are any SHF_TLS output sections, add PT_TLS segment. */
3773 amt
= sizeof (struct elf_segment_map
);
3774 amt
+= (tls_count
- 1) * sizeof (asection
*);
3775 m
= bfd_zalloc (abfd
, amt
);
3780 m
->count
= tls_count
;
3781 /* Mandated PF_R. */
3783 m
->p_flags_valid
= 1;
3784 for (i
= 0; i
< tls_count
; ++i
)
3786 BFD_ASSERT (first_tls
->flags
& SEC_THREAD_LOCAL
);
3787 m
->sections
[i
] = first_tls
;
3788 first_tls
= first_tls
->next
;
3795 /* If there is a .eh_frame_hdr section, throw in a PT_GNU_EH_FRAME
3797 eh_frame_hdr
= elf_tdata (abfd
)->eh_frame_hdr
;
3798 if (eh_frame_hdr
!= NULL
3799 && (eh_frame_hdr
->output_section
->flags
& SEC_LOAD
) != 0)
3801 amt
= sizeof (struct elf_segment_map
);
3802 m
= bfd_zalloc (abfd
, amt
);
3806 m
->p_type
= PT_GNU_EH_FRAME
;
3808 m
->sections
[0] = eh_frame_hdr
->output_section
;
3814 if (elf_tdata (abfd
)->stack_flags
)
3816 amt
= sizeof (struct elf_segment_map
);
3817 m
= bfd_zalloc (abfd
, amt
);
3821 m
->p_type
= PT_GNU_STACK
;
3822 m
->p_flags
= elf_tdata (abfd
)->stack_flags
;
3823 m
->p_flags_valid
= 1;
3829 if (dynsec
!= NULL
&& elf_tdata (abfd
)->relro
)
3831 /* We make a PT_GNU_RELRO segment only when there is a
3832 PT_DYNAMIC segment. */
3833 amt
= sizeof (struct elf_segment_map
);
3834 m
= bfd_zalloc (abfd
, amt
);
3838 m
->p_type
= PT_GNU_RELRO
;
3840 m
->p_flags_valid
= 1;
3847 elf_tdata (abfd
)->segment_map
= mfirst
;
3850 if (!elf_modify_segment_map (abfd
, info
))
3853 for (count
= 0, m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
3855 elf_tdata (abfd
)->program_header_size
= count
* bed
->s
->sizeof_phdr
;
3860 if (sections
!= NULL
)
3865 /* Sort sections by address. */
3868 elf_sort_sections (const void *arg1
, const void *arg2
)
3870 const asection
*sec1
= *(const asection
**) arg1
;
3871 const asection
*sec2
= *(const asection
**) arg2
;
3872 bfd_size_type size1
, size2
;
3874 /* Sort by LMA first, since this is the address used to
3875 place the section into a segment. */
3876 if (sec1
->lma
< sec2
->lma
)
3878 else if (sec1
->lma
> sec2
->lma
)
3881 /* Then sort by VMA. Normally the LMA and the VMA will be
3882 the same, and this will do nothing. */
3883 if (sec1
->vma
< sec2
->vma
)
3885 else if (sec1
->vma
> sec2
->vma
)
3888 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
3890 #define TOEND(x) (((x)->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0)
3896 /* If the indicies are the same, do not return 0
3897 here, but continue to try the next comparison. */
3898 if (sec1
->target_index
- sec2
->target_index
!= 0)
3899 return sec1
->target_index
- sec2
->target_index
;
3904 else if (TOEND (sec2
))
3909 /* Sort by size, to put zero sized sections
3910 before others at the same address. */
3912 size1
= (sec1
->flags
& SEC_LOAD
) ? sec1
->size
: 0;
3913 size2
= (sec2
->flags
& SEC_LOAD
) ? sec2
->size
: 0;
3920 return sec1
->target_index
- sec2
->target_index
;
3923 /* Ian Lance Taylor writes:
3925 We shouldn't be using % with a negative signed number. That's just
3926 not good. We have to make sure either that the number is not
3927 negative, or that the number has an unsigned type. When the types
3928 are all the same size they wind up as unsigned. When file_ptr is a
3929 larger signed type, the arithmetic winds up as signed long long,
3932 What we're trying to say here is something like ``increase OFF by
3933 the least amount that will cause it to be equal to the VMA modulo
3935 /* In other words, something like:
3937 vma_offset = m->sections[0]->vma % bed->maxpagesize;
3938 off_offset = off % bed->maxpagesize;
3939 if (vma_offset < off_offset)
3940 adjustment = vma_offset + bed->maxpagesize - off_offset;
3942 adjustment = vma_offset - off_offset;
3944 which can can be collapsed into the expression below. */
3947 vma_page_aligned_bias (bfd_vma vma
, ufile_ptr off
, bfd_vma maxpagesize
)
3949 return ((vma
- off
) % maxpagesize
);
3952 /* Assign file positions to the sections based on the mapping from
3953 sections to segments. This function also sets up some fields in
3957 assign_file_positions_for_load_sections (bfd
*abfd
,
3958 struct bfd_link_info
*link_info
)
3960 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3961 struct elf_segment_map
*m
;
3962 Elf_Internal_Phdr
*phdrs
;
3963 Elf_Internal_Phdr
*p
;
3965 bfd_size_type maxpagesize
;
3969 if (link_info
== NULL
3970 && !elf_modify_segment_map (abfd
, link_info
))
3974 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
3977 elf_elfheader (abfd
)->e_phoff
= bed
->s
->sizeof_ehdr
;
3978 elf_elfheader (abfd
)->e_phentsize
= bed
->s
->sizeof_phdr
;
3979 elf_elfheader (abfd
)->e_phnum
= alloc
;
3981 if (elf_tdata (abfd
)->program_header_size
== (bfd_size_type
) -1)
3982 elf_tdata (abfd
)->program_header_size
= alloc
* bed
->s
->sizeof_phdr
;
3984 BFD_ASSERT (elf_tdata (abfd
)->program_header_size
3985 >= alloc
* bed
->s
->sizeof_phdr
);
3989 elf_tdata (abfd
)->next_file_pos
= bed
->s
->sizeof_ehdr
;
3993 phdrs
= bfd_alloc2 (abfd
, alloc
, sizeof (Elf_Internal_Phdr
));
3994 elf_tdata (abfd
)->phdr
= phdrs
;
3999 if ((abfd
->flags
& D_PAGED
) != 0)
4000 maxpagesize
= bed
->maxpagesize
;
4002 off
= bed
->s
->sizeof_ehdr
;
4003 off
+= alloc
* bed
->s
->sizeof_phdr
;
4005 for (m
= elf_tdata (abfd
)->segment_map
, p
= phdrs
, j
= 0;
4007 m
= m
->next
, p
++, j
++)
4011 bfd_boolean no_contents
;
4013 /* If elf_segment_map is not from map_sections_to_segments, the
4014 sections may not be correctly ordered. NOTE: sorting should
4015 not be done to the PT_NOTE section of a corefile, which may
4016 contain several pseudo-sections artificially created by bfd.
4017 Sorting these pseudo-sections breaks things badly. */
4019 && !(elf_elfheader (abfd
)->e_type
== ET_CORE
4020 && m
->p_type
== PT_NOTE
))
4021 qsort (m
->sections
, (size_t) m
->count
, sizeof (asection
*),
4024 /* An ELF segment (described by Elf_Internal_Phdr) may contain a
4025 number of sections with contents contributing to both p_filesz
4026 and p_memsz, followed by a number of sections with no contents
4027 that just contribute to p_memsz. In this loop, OFF tracks next
4028 available file offset for PT_LOAD and PT_NOTE segments. */
4029 p
->p_type
= m
->p_type
;
4030 p
->p_flags
= m
->p_flags
;
4035 p
->p_vaddr
= m
->sections
[0]->vma
- m
->p_vaddr_offset
;
4037 if (m
->p_paddr_valid
)
4038 p
->p_paddr
= m
->p_paddr
;
4039 else if (m
->count
== 0)
4042 p
->p_paddr
= m
->sections
[0]->lma
- m
->p_vaddr_offset
;
4044 if (p
->p_type
== PT_LOAD
4045 && (abfd
->flags
& D_PAGED
) != 0)
4047 /* p_align in demand paged PT_LOAD segments effectively stores
4048 the maximum page size. When copying an executable with
4049 objcopy, we set m->p_align from the input file. Use this
4050 value for maxpagesize rather than bed->maxpagesize, which
4051 may be different. Note that we use maxpagesize for PT_TLS
4052 segment alignment later in this function, so we are relying
4053 on at least one PT_LOAD segment appearing before a PT_TLS
4055 if (m
->p_align_valid
)
4056 maxpagesize
= m
->p_align
;
4058 p
->p_align
= maxpagesize
;
4060 else if (m
->count
== 0)
4061 p
->p_align
= 1 << bed
->s
->log_file_align
;
4062 else if (m
->p_align_valid
)
4063 p
->p_align
= m
->p_align
;
4067 no_contents
= FALSE
;
4069 if (p
->p_type
== PT_LOAD
4072 bfd_size_type align
;
4073 unsigned int align_power
= 0;
4075 if (m
->p_align_valid
)
4079 for (i
= 0, secpp
= m
->sections
; i
< m
->count
; i
++, secpp
++)
4081 unsigned int secalign
;
4083 secalign
= bfd_get_section_alignment (abfd
, *secpp
);
4084 if (secalign
> align_power
)
4085 align_power
= secalign
;
4087 align
= (bfd_size_type
) 1 << align_power
;
4088 if (align
< maxpagesize
)
4089 align
= maxpagesize
;
4092 for (i
= 0; i
< m
->count
; i
++)
4093 if ((m
->sections
[i
]->flags
& (SEC_LOAD
| SEC_HAS_CONTENTS
)) == 0)
4094 /* If we aren't making room for this section, then
4095 it must be SHT_NOBITS regardless of what we've
4096 set via struct bfd_elf_special_section. */
4097 elf_section_type (m
->sections
[i
]) = SHT_NOBITS
;
4099 /* Find out whether this segment contains any loadable
4100 sections. If the first section isn't loadable, the same
4101 holds for any other sections. */
4103 while (elf_section_type (m
->sections
[i
]) == SHT_NOBITS
)
4105 /* If a segment starts with .tbss, we need to look
4106 at the next section to decide whether the segment
4107 has any loadable sections. */
4108 if ((elf_section_flags (m
->sections
[i
]) & SHF_TLS
) == 0
4116 off_adjust
= vma_page_aligned_bias (m
->sections
[0]->vma
, off
, align
);
4120 /* We shouldn't need to align the segment on disk since
4121 the segment doesn't need file space, but the gABI
4122 arguably requires the alignment and glibc ld.so
4123 checks it. So to comply with the alignment
4124 requirement but not waste file space, we adjust
4125 p_offset for just this segment. (OFF_ADJUST is
4126 subtracted from OFF later.) This may put p_offset
4127 past the end of file, but that shouldn't matter. */
4132 /* Make sure the .dynamic section is the first section in the
4133 PT_DYNAMIC segment. */
4134 else if (p
->p_type
== PT_DYNAMIC
4136 && strcmp (m
->sections
[0]->name
, ".dynamic") != 0)
4139 (_("%B: The first section in the PT_DYNAMIC segment is not the .dynamic section"),
4141 bfd_set_error (bfd_error_bad_value
);
4149 if (m
->includes_filehdr
)
4151 if (!m
->p_flags_valid
)
4153 p
->p_filesz
= bed
->s
->sizeof_ehdr
;
4154 p
->p_memsz
= bed
->s
->sizeof_ehdr
;
4157 BFD_ASSERT (p
->p_type
== PT_LOAD
);
4159 if (p
->p_vaddr
< (bfd_vma
) off
)
4161 (*_bfd_error_handler
)
4162 (_("%B: Not enough room for program headers, try linking with -N"),
4164 bfd_set_error (bfd_error_bad_value
);
4169 if (!m
->p_paddr_valid
)
4174 if (m
->includes_phdrs
)
4176 if (!m
->p_flags_valid
)
4179 if (!m
->includes_filehdr
)
4181 p
->p_offset
= bed
->s
->sizeof_ehdr
;
4185 BFD_ASSERT (p
->p_type
== PT_LOAD
);
4186 p
->p_vaddr
-= off
- p
->p_offset
;
4187 if (!m
->p_paddr_valid
)
4188 p
->p_paddr
-= off
- p
->p_offset
;
4192 p
->p_filesz
+= alloc
* bed
->s
->sizeof_phdr
;
4193 p
->p_memsz
+= alloc
* bed
->s
->sizeof_phdr
;
4196 if (p
->p_type
== PT_LOAD
4197 || (p
->p_type
== PT_NOTE
&& bfd_get_format (abfd
) == bfd_core
))
4199 if (!m
->includes_filehdr
&& !m
->includes_phdrs
)
4205 adjust
= off
- (p
->p_offset
+ p
->p_filesz
);
4207 p
->p_filesz
+= adjust
;
4208 p
->p_memsz
+= adjust
;
4212 /* Set up p_filesz, p_memsz, p_align and p_flags from the section
4213 maps. Set filepos for sections in PT_LOAD segments, and in
4214 core files, for sections in PT_NOTE segments.
4215 assign_file_positions_for_non_load_sections will set filepos
4216 for other sections and update p_filesz for other segments. */
4217 for (i
= 0, secpp
= m
->sections
; i
< m
->count
; i
++, secpp
++)
4220 bfd_size_type align
;
4221 Elf_Internal_Shdr
*this_hdr
;
4224 this_hdr
= &elf_section_data (sec
)->this_hdr
;
4225 align
= (bfd_size_type
) 1 << bfd_get_section_alignment (abfd
, sec
);
4227 if (p
->p_type
== PT_LOAD
4228 || p
->p_type
== PT_TLS
)
4230 bfd_signed_vma adjust
= sec
->lma
- (p
->p_paddr
+ p
->p_memsz
);
4232 if (this_hdr
->sh_type
!= SHT_NOBITS
4233 || ((this_hdr
->sh_flags
& SHF_ALLOC
) != 0
4234 && ((this_hdr
->sh_flags
& SHF_TLS
) == 0
4235 || p
->p_type
== PT_TLS
)))
4239 (*_bfd_error_handler
)
4240 (_("%B: section %A lma 0x%lx overlaps previous sections"),
4241 abfd
, sec
, (unsigned long) sec
->lma
);
4244 p
->p_memsz
+= adjust
;
4246 if (this_hdr
->sh_type
!= SHT_NOBITS
)
4249 p
->p_filesz
+= adjust
;
4254 if (p
->p_type
== PT_NOTE
&& bfd_get_format (abfd
) == bfd_core
)
4256 /* The section at i == 0 is the one that actually contains
4260 this_hdr
->sh_offset
= sec
->filepos
= off
;
4261 off
+= this_hdr
->sh_size
;
4262 p
->p_filesz
= this_hdr
->sh_size
;
4268 /* The rest are fake sections that shouldn't be written. */
4277 if (p
->p_type
== PT_LOAD
)
4279 this_hdr
->sh_offset
= sec
->filepos
= off
;
4280 if (this_hdr
->sh_type
!= SHT_NOBITS
)
4281 off
+= this_hdr
->sh_size
;
4284 if (this_hdr
->sh_type
!= SHT_NOBITS
)
4286 p
->p_filesz
+= this_hdr
->sh_size
;
4287 /* A load section without SHF_ALLOC is something like
4288 a note section in a PT_NOTE segment. These take
4289 file space but are not loaded into memory. */
4290 if ((this_hdr
->sh_flags
& SHF_ALLOC
) != 0)
4291 p
->p_memsz
+= this_hdr
->sh_size
;
4293 else if ((this_hdr
->sh_flags
& SHF_ALLOC
) != 0)
4295 if (p
->p_type
== PT_TLS
)
4296 p
->p_memsz
+= this_hdr
->sh_size
;
4298 /* .tbss is special. It doesn't contribute to p_memsz of
4300 else if ((this_hdr
->sh_flags
& SHF_TLS
) == 0)
4301 p
->p_memsz
+= this_hdr
->sh_size
;
4304 if (p
->p_type
== PT_GNU_RELRO
)
4306 else if (align
> p
->p_align
4307 && !m
->p_align_valid
4308 && (p
->p_type
!= PT_LOAD
4309 || (abfd
->flags
& D_PAGED
) == 0))
4313 if (!m
->p_flags_valid
)
4316 if ((this_hdr
->sh_flags
& SHF_EXECINSTR
) != 0)
4318 if ((this_hdr
->sh_flags
& SHF_WRITE
) != 0)
4324 /* Check that all sections are in a PT_LOAD segment.
4325 Don't check funky gdb generated core files. */
4326 if (p
->p_type
== PT_LOAD
&& bfd_get_format (abfd
) != bfd_core
)
4327 for (i
= 0, secpp
= m
->sections
; i
< m
->count
; i
++, secpp
++)
4329 Elf_Internal_Shdr
*this_hdr
;
4333 this_hdr
= &(elf_section_data(sec
)->this_hdr
);
4334 if (this_hdr
->sh_size
!= 0
4335 && !ELF_IS_SECTION_IN_SEGMENT_FILE (this_hdr
, p
))
4337 (*_bfd_error_handler
)
4338 (_("%B: section `%A' can't be allocated in segment %d"),
4340 bfd_set_error (bfd_error_bad_value
);
4346 elf_tdata (abfd
)->next_file_pos
= off
;
4350 /* Assign file positions for the other sections. */
4353 assign_file_positions_for_non_load_sections (bfd
*abfd
,
4354 struct bfd_link_info
*link_info
)
4356 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4357 Elf_Internal_Shdr
**i_shdrpp
;
4358 Elf_Internal_Shdr
**hdrpp
;
4359 Elf_Internal_Phdr
*phdrs
;
4360 Elf_Internal_Phdr
*p
;
4361 struct elf_segment_map
*m
;
4362 bfd_vma filehdr_vaddr
, filehdr_paddr
;
4363 bfd_vma phdrs_vaddr
, phdrs_paddr
;
4365 unsigned int num_sec
;
4369 i_shdrpp
= elf_elfsections (abfd
);
4370 num_sec
= elf_numsections (abfd
);
4371 off
= elf_tdata (abfd
)->next_file_pos
;
4372 for (i
= 1, hdrpp
= i_shdrpp
+ 1; i
< num_sec
; i
++, hdrpp
++)
4374 struct elf_obj_tdata
*tdata
= elf_tdata (abfd
);
4375 Elf_Internal_Shdr
*hdr
;
4378 if (hdr
->bfd_section
!= NULL
4379 && (hdr
->bfd_section
->filepos
!= 0
4380 || (hdr
->sh_type
== SHT_NOBITS
4381 && hdr
->contents
== NULL
)))
4382 BFD_ASSERT (hdr
->sh_offset
== hdr
->bfd_section
->filepos
);
4383 else if ((hdr
->sh_flags
& SHF_ALLOC
) != 0)
4385 if (hdr
->sh_size
!= 0)
4386 ((*_bfd_error_handler
)
4387 (_("%B: warning: allocated section `%s' not in segment"),
4389 (hdr
->bfd_section
== NULL
4391 : hdr
->bfd_section
->name
)));
4392 /* We don't need to page align empty sections. */
4393 if ((abfd
->flags
& D_PAGED
) != 0 && hdr
->sh_size
!= 0)
4394 off
+= vma_page_aligned_bias (hdr
->sh_addr
, off
,
4397 off
+= vma_page_aligned_bias (hdr
->sh_addr
, off
,
4399 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
,
4402 else if (((hdr
->sh_type
== SHT_REL
|| hdr
->sh_type
== SHT_RELA
)
4403 && hdr
->bfd_section
== NULL
)
4404 || hdr
== i_shdrpp
[tdata
->symtab_section
]
4405 || hdr
== i_shdrpp
[tdata
->symtab_shndx_section
]
4406 || hdr
== i_shdrpp
[tdata
->strtab_section
])
4407 hdr
->sh_offset
= -1;
4409 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
4411 if (i
== SHN_LORESERVE
- 1)
4413 i
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4414 hdrpp
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4418 /* Now that we have set the section file positions, we can set up
4419 the file positions for the non PT_LOAD segments. */
4423 phdrs_vaddr
= bed
->maxpagesize
+ bed
->s
->sizeof_ehdr
;
4425 phdrs
= elf_tdata (abfd
)->phdr
;
4426 for (m
= elf_tdata (abfd
)->segment_map
, p
= phdrs
;
4431 if (p
->p_type
!= PT_LOAD
)
4434 if (m
->includes_filehdr
)
4436 filehdr_vaddr
= p
->p_vaddr
;
4437 filehdr_paddr
= p
->p_paddr
;
4439 if (m
->includes_phdrs
)
4441 phdrs_vaddr
= p
->p_vaddr
;
4442 phdrs_paddr
= p
->p_paddr
;
4443 if (m
->includes_filehdr
)
4445 phdrs_vaddr
+= bed
->s
->sizeof_ehdr
;
4446 phdrs_paddr
+= bed
->s
->sizeof_ehdr
;
4451 for (m
= elf_tdata (abfd
)->segment_map
, p
= phdrs
;
4457 if (p
->p_type
!= PT_LOAD
4458 && (p
->p_type
!= PT_NOTE
|| bfd_get_format (abfd
) != bfd_core
))
4460 Elf_Internal_Shdr
*hdr
;
4461 BFD_ASSERT (!m
->includes_filehdr
&& !m
->includes_phdrs
);
4463 hdr
= &elf_section_data (m
->sections
[m
->count
- 1])->this_hdr
;
4464 p
->p_filesz
= (m
->sections
[m
->count
- 1]->filepos
4465 - m
->sections
[0]->filepos
);
4466 if (hdr
->sh_type
!= SHT_NOBITS
)
4467 p
->p_filesz
+= hdr
->sh_size
;
4469 p
->p_offset
= m
->sections
[0]->filepos
;
4474 if (m
->includes_filehdr
)
4476 p
->p_vaddr
= filehdr_vaddr
;
4477 if (! m
->p_paddr_valid
)
4478 p
->p_paddr
= filehdr_paddr
;
4480 else if (m
->includes_phdrs
)
4482 p
->p_vaddr
= phdrs_vaddr
;
4483 if (! m
->p_paddr_valid
)
4484 p
->p_paddr
= phdrs_paddr
;
4486 else if (p
->p_type
== PT_GNU_RELRO
)
4488 Elf_Internal_Phdr
*lp
;
4490 for (lp
= phdrs
; lp
< phdrs
+ count
; ++lp
)
4492 if (lp
->p_type
== PT_LOAD
4493 && lp
->p_vaddr
<= link_info
->relro_end
4494 && lp
->p_vaddr
>= link_info
->relro_start
4495 && (lp
->p_vaddr
+ lp
->p_filesz
4496 >= link_info
->relro_end
))
4500 if (lp
< phdrs
+ count
4501 && link_info
->relro_end
> lp
->p_vaddr
)
4503 p
->p_vaddr
= lp
->p_vaddr
;
4504 p
->p_paddr
= lp
->p_paddr
;
4505 p
->p_offset
= lp
->p_offset
;
4506 p
->p_filesz
= link_info
->relro_end
- lp
->p_vaddr
;
4507 p
->p_memsz
= p
->p_filesz
;
4509 p
->p_flags
= (lp
->p_flags
& ~PF_W
);
4513 memset (p
, 0, sizeof *p
);
4514 p
->p_type
= PT_NULL
;
4520 elf_tdata (abfd
)->next_file_pos
= off
;
4525 /* Work out the file positions of all the sections. This is called by
4526 _bfd_elf_compute_section_file_positions. All the section sizes and
4527 VMAs must be known before this is called.
4529 Reloc sections come in two flavours: Those processed specially as
4530 "side-channel" data attached to a section to which they apply, and
4531 those that bfd doesn't process as relocations. The latter sort are
4532 stored in a normal bfd section by bfd_section_from_shdr. We don't
4533 consider the former sort here, unless they form part of the loadable
4534 image. Reloc sections not assigned here will be handled later by
4535 assign_file_positions_for_relocs.
4537 We also don't set the positions of the .symtab and .strtab here. */
4540 assign_file_positions_except_relocs (bfd
*abfd
,
4541 struct bfd_link_info
*link_info
)
4543 struct elf_obj_tdata
*tdata
= elf_tdata (abfd
);
4544 Elf_Internal_Ehdr
*i_ehdrp
= elf_elfheader (abfd
);
4546 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4548 if ((abfd
->flags
& (EXEC_P
| DYNAMIC
)) == 0
4549 && bfd_get_format (abfd
) != bfd_core
)
4551 Elf_Internal_Shdr
** const i_shdrpp
= elf_elfsections (abfd
);
4552 unsigned int num_sec
= elf_numsections (abfd
);
4553 Elf_Internal_Shdr
**hdrpp
;
4556 /* Start after the ELF header. */
4557 off
= i_ehdrp
->e_ehsize
;
4559 /* We are not creating an executable, which means that we are
4560 not creating a program header, and that the actual order of
4561 the sections in the file is unimportant. */
4562 for (i
= 1, hdrpp
= i_shdrpp
+ 1; i
< num_sec
; i
++, hdrpp
++)
4564 Elf_Internal_Shdr
*hdr
;
4567 if (((hdr
->sh_type
== SHT_REL
|| hdr
->sh_type
== SHT_RELA
)
4568 && hdr
->bfd_section
== NULL
)
4569 || i
== tdata
->symtab_section
4570 || i
== tdata
->symtab_shndx_section
4571 || i
== tdata
->strtab_section
)
4573 hdr
->sh_offset
= -1;
4576 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
4578 if (i
== SHN_LORESERVE
- 1)
4580 i
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4581 hdrpp
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4589 /* Assign file positions for the loaded sections based on the
4590 assignment of sections to segments. */
4591 if (!assign_file_positions_for_load_sections (abfd
, link_info
))
4594 /* And for non-load sections. */
4595 if (!assign_file_positions_for_non_load_sections (abfd
, link_info
))
4598 if (bed
->elf_backend_modify_program_headers
!= NULL
)
4600 if (!(*bed
->elf_backend_modify_program_headers
) (abfd
, link_info
))
4604 /* Write out the program headers. */
4605 alloc
= tdata
->program_header_size
/ bed
->s
->sizeof_phdr
;
4606 if (bfd_seek (abfd
, (bfd_signed_vma
) bed
->s
->sizeof_ehdr
, SEEK_SET
) != 0
4607 || bed
->s
->write_out_phdrs (abfd
, tdata
->phdr
, alloc
) != 0)
4610 off
= tdata
->next_file_pos
;
4613 /* Place the section headers. */
4614 off
= align_file_position (off
, 1 << bed
->s
->log_file_align
);
4615 i_ehdrp
->e_shoff
= off
;
4616 off
+= i_ehdrp
->e_shnum
* i_ehdrp
->e_shentsize
;
4618 tdata
->next_file_pos
= off
;
4624 prep_headers (bfd
*abfd
)
4626 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
4627 Elf_Internal_Phdr
*i_phdrp
= 0; /* Program header table, internal form */
4628 Elf_Internal_Shdr
**i_shdrp
; /* Section header table, internal form */
4629 struct elf_strtab_hash
*shstrtab
;
4630 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4632 i_ehdrp
= elf_elfheader (abfd
);
4633 i_shdrp
= elf_elfsections (abfd
);
4635 shstrtab
= _bfd_elf_strtab_init ();
4636 if (shstrtab
== NULL
)
4639 elf_shstrtab (abfd
) = shstrtab
;
4641 i_ehdrp
->e_ident
[EI_MAG0
] = ELFMAG0
;
4642 i_ehdrp
->e_ident
[EI_MAG1
] = ELFMAG1
;
4643 i_ehdrp
->e_ident
[EI_MAG2
] = ELFMAG2
;
4644 i_ehdrp
->e_ident
[EI_MAG3
] = ELFMAG3
;
4646 i_ehdrp
->e_ident
[EI_CLASS
] = bed
->s
->elfclass
;
4647 i_ehdrp
->e_ident
[EI_DATA
] =
4648 bfd_big_endian (abfd
) ? ELFDATA2MSB
: ELFDATA2LSB
;
4649 i_ehdrp
->e_ident
[EI_VERSION
] = bed
->s
->ev_current
;
4651 if ((abfd
->flags
& DYNAMIC
) != 0)
4652 i_ehdrp
->e_type
= ET_DYN
;
4653 else if ((abfd
->flags
& EXEC_P
) != 0)
4654 i_ehdrp
->e_type
= ET_EXEC
;
4655 else if (bfd_get_format (abfd
) == bfd_core
)
4656 i_ehdrp
->e_type
= ET_CORE
;
4658 i_ehdrp
->e_type
= ET_REL
;
4660 switch (bfd_get_arch (abfd
))
4662 case bfd_arch_unknown
:
4663 i_ehdrp
->e_machine
= EM_NONE
;
4666 /* There used to be a long list of cases here, each one setting
4667 e_machine to the same EM_* macro #defined as ELF_MACHINE_CODE
4668 in the corresponding bfd definition. To avoid duplication,
4669 the switch was removed. Machines that need special handling
4670 can generally do it in elf_backend_final_write_processing(),
4671 unless they need the information earlier than the final write.
4672 Such need can generally be supplied by replacing the tests for
4673 e_machine with the conditions used to determine it. */
4675 i_ehdrp
->e_machine
= bed
->elf_machine_code
;
4678 i_ehdrp
->e_version
= bed
->s
->ev_current
;
4679 i_ehdrp
->e_ehsize
= bed
->s
->sizeof_ehdr
;
4681 /* No program header, for now. */
4682 i_ehdrp
->e_phoff
= 0;
4683 i_ehdrp
->e_phentsize
= 0;
4684 i_ehdrp
->e_phnum
= 0;
4686 /* Each bfd section is section header entry. */
4687 i_ehdrp
->e_entry
= bfd_get_start_address (abfd
);
4688 i_ehdrp
->e_shentsize
= bed
->s
->sizeof_shdr
;
4690 /* If we're building an executable, we'll need a program header table. */
4691 if (abfd
->flags
& EXEC_P
)
4692 /* It all happens later. */
4696 i_ehdrp
->e_phentsize
= 0;
4698 i_ehdrp
->e_phoff
= 0;
4701 elf_tdata (abfd
)->symtab_hdr
.sh_name
=
4702 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".symtab", FALSE
);
4703 elf_tdata (abfd
)->strtab_hdr
.sh_name
=
4704 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".strtab", FALSE
);
4705 elf_tdata (abfd
)->shstrtab_hdr
.sh_name
=
4706 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".shstrtab", FALSE
);
4707 if (elf_tdata (abfd
)->symtab_hdr
.sh_name
== (unsigned int) -1
4708 || elf_tdata (abfd
)->symtab_hdr
.sh_name
== (unsigned int) -1
4709 || elf_tdata (abfd
)->shstrtab_hdr
.sh_name
== (unsigned int) -1)
4715 /* Assign file positions for all the reloc sections which are not part
4716 of the loadable file image. */
4719 _bfd_elf_assign_file_positions_for_relocs (bfd
*abfd
)
4722 unsigned int i
, num_sec
;
4723 Elf_Internal_Shdr
**shdrpp
;
4725 off
= elf_tdata (abfd
)->next_file_pos
;
4727 num_sec
= elf_numsections (abfd
);
4728 for (i
= 1, shdrpp
= elf_elfsections (abfd
) + 1; i
< num_sec
; i
++, shdrpp
++)
4730 Elf_Internal_Shdr
*shdrp
;
4733 if ((shdrp
->sh_type
== SHT_REL
|| shdrp
->sh_type
== SHT_RELA
)
4734 && shdrp
->sh_offset
== -1)
4735 off
= _bfd_elf_assign_file_position_for_section (shdrp
, off
, TRUE
);
4738 elf_tdata (abfd
)->next_file_pos
= off
;
4742 _bfd_elf_write_object_contents (bfd
*abfd
)
4744 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4745 Elf_Internal_Ehdr
*i_ehdrp
;
4746 Elf_Internal_Shdr
**i_shdrp
;
4748 unsigned int count
, num_sec
;
4750 if (! abfd
->output_has_begun
4751 && ! _bfd_elf_compute_section_file_positions (abfd
, NULL
))
4754 i_shdrp
= elf_elfsections (abfd
);
4755 i_ehdrp
= elf_elfheader (abfd
);
4758 bfd_map_over_sections (abfd
, bed
->s
->write_relocs
, &failed
);
4762 _bfd_elf_assign_file_positions_for_relocs (abfd
);
4764 /* After writing the headers, we need to write the sections too... */
4765 num_sec
= elf_numsections (abfd
);
4766 for (count
= 1; count
< num_sec
; count
++)
4768 if (bed
->elf_backend_section_processing
)
4769 (*bed
->elf_backend_section_processing
) (abfd
, i_shdrp
[count
]);
4770 if (i_shdrp
[count
]->contents
)
4772 bfd_size_type amt
= i_shdrp
[count
]->sh_size
;
4774 if (bfd_seek (abfd
, i_shdrp
[count
]->sh_offset
, SEEK_SET
) != 0
4775 || bfd_bwrite (i_shdrp
[count
]->contents
, amt
, abfd
) != amt
)
4778 if (count
== SHN_LORESERVE
- 1)
4779 count
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4782 /* Write out the section header names. */
4783 if (elf_shstrtab (abfd
) != NULL
4784 && (bfd_seek (abfd
, elf_tdata (abfd
)->shstrtab_hdr
.sh_offset
, SEEK_SET
) != 0
4785 || !_bfd_elf_strtab_emit (abfd
, elf_shstrtab (abfd
))))
4788 if (bed
->elf_backend_final_write_processing
)
4789 (*bed
->elf_backend_final_write_processing
) (abfd
,
4790 elf_tdata (abfd
)->linker
);
4792 if (!bed
->s
->write_shdrs_and_ehdr (abfd
))
4795 /* This is last since write_shdrs_and_ehdr can touch i_shdrp[0]. */
4796 if (elf_tdata (abfd
)->after_write_object_contents
)
4797 return (*elf_tdata (abfd
)->after_write_object_contents
) (abfd
);
4803 _bfd_elf_write_corefile_contents (bfd
*abfd
)
4805 /* Hopefully this can be done just like an object file. */
4806 return _bfd_elf_write_object_contents (abfd
);
4809 /* Given a section, search the header to find them. */
4812 _bfd_elf_section_from_bfd_section (bfd
*abfd
, struct bfd_section
*asect
)
4814 const struct elf_backend_data
*bed
;
4817 if (elf_section_data (asect
) != NULL
4818 && elf_section_data (asect
)->this_idx
!= 0)
4819 return elf_section_data (asect
)->this_idx
;
4821 if (bfd_is_abs_section (asect
))
4823 else if (bfd_is_com_section (asect
))
4825 else if (bfd_is_und_section (asect
))
4830 bed
= get_elf_backend_data (abfd
);
4831 if (bed
->elf_backend_section_from_bfd_section
)
4835 if ((*bed
->elf_backend_section_from_bfd_section
) (abfd
, asect
, &retval
))
4840 bfd_set_error (bfd_error_nonrepresentable_section
);
4845 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
4849 _bfd_elf_symbol_from_bfd_symbol (bfd
*abfd
, asymbol
**asym_ptr_ptr
)
4851 asymbol
*asym_ptr
= *asym_ptr_ptr
;
4853 flagword flags
= asym_ptr
->flags
;
4855 /* When gas creates relocations against local labels, it creates its
4856 own symbol for the section, but does put the symbol into the
4857 symbol chain, so udata is 0. When the linker is generating
4858 relocatable output, this section symbol may be for one of the
4859 input sections rather than the output section. */
4860 if (asym_ptr
->udata
.i
== 0
4861 && (flags
& BSF_SECTION_SYM
)
4862 && asym_ptr
->section
)
4867 sec
= asym_ptr
->section
;
4868 if (sec
->owner
!= abfd
&& sec
->output_section
!= NULL
)
4869 sec
= sec
->output_section
;
4870 if (sec
->owner
== abfd
4871 && (indx
= sec
->index
) < elf_num_section_syms (abfd
)
4872 && elf_section_syms (abfd
)[indx
] != NULL
)
4873 asym_ptr
->udata
.i
= elf_section_syms (abfd
)[indx
]->udata
.i
;
4876 idx
= asym_ptr
->udata
.i
;
4880 /* This case can occur when using --strip-symbol on a symbol
4881 which is used in a relocation entry. */
4882 (*_bfd_error_handler
)
4883 (_("%B: symbol `%s' required but not present"),
4884 abfd
, bfd_asymbol_name (asym_ptr
));
4885 bfd_set_error (bfd_error_no_symbols
);
4892 "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n",
4893 (long) asym_ptr
, asym_ptr
->name
, idx
, flags
,
4894 elf_symbol_flags (flags
));
4902 /* Rewrite program header information. */
4905 rewrite_elf_program_header (bfd
*ibfd
, bfd
*obfd
)
4907 Elf_Internal_Ehdr
*iehdr
;
4908 struct elf_segment_map
*map
;
4909 struct elf_segment_map
*map_first
;
4910 struct elf_segment_map
**pointer_to_map
;
4911 Elf_Internal_Phdr
*segment
;
4914 unsigned int num_segments
;
4915 bfd_boolean phdr_included
= FALSE
;
4916 bfd_vma maxpagesize
;
4917 struct elf_segment_map
*phdr_adjust_seg
= NULL
;
4918 unsigned int phdr_adjust_num
= 0;
4919 const struct elf_backend_data
*bed
;
4921 bed
= get_elf_backend_data (ibfd
);
4922 iehdr
= elf_elfheader (ibfd
);
4925 pointer_to_map
= &map_first
;
4927 num_segments
= elf_elfheader (ibfd
)->e_phnum
;
4928 maxpagesize
= get_elf_backend_data (obfd
)->maxpagesize
;
4930 /* Returns the end address of the segment + 1. */
4931 #define SEGMENT_END(segment, start) \
4932 (start + (segment->p_memsz > segment->p_filesz \
4933 ? segment->p_memsz : segment->p_filesz))
4935 #define SECTION_SIZE(section, segment) \
4936 (((section->flags & (SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) \
4937 != SEC_THREAD_LOCAL || segment->p_type == PT_TLS) \
4938 ? section->size : 0)
4940 /* Returns TRUE if the given section is contained within
4941 the given segment. VMA addresses are compared. */
4942 #define IS_CONTAINED_BY_VMA(section, segment) \
4943 (section->vma >= segment->p_vaddr \
4944 && (section->vma + SECTION_SIZE (section, segment) \
4945 <= (SEGMENT_END (segment, segment->p_vaddr))))
4947 /* Returns TRUE if the given section is contained within
4948 the given segment. LMA addresses are compared. */
4949 #define IS_CONTAINED_BY_LMA(section, segment, base) \
4950 (section->lma >= base \
4951 && (section->lma + SECTION_SIZE (section, segment) \
4952 <= SEGMENT_END (segment, base)))
4954 /* Special case: corefile "NOTE" section containing regs, prpsinfo etc. */
4955 #define IS_COREFILE_NOTE(p, s) \
4956 (p->p_type == PT_NOTE \
4957 && bfd_get_format (ibfd) == bfd_core \
4958 && s->vma == 0 && s->lma == 0 \
4959 && (bfd_vma) s->filepos >= p->p_offset \
4960 && ((bfd_vma) s->filepos + s->size \
4961 <= p->p_offset + p->p_filesz))
4963 /* The complicated case when p_vaddr is 0 is to handle the Solaris
4964 linker, which generates a PT_INTERP section with p_vaddr and
4965 p_memsz set to 0. */
4966 #define IS_SOLARIS_PT_INTERP(p, s) \
4968 && p->p_paddr == 0 \
4969 && p->p_memsz == 0 \
4970 && p->p_filesz > 0 \
4971 && (s->flags & SEC_HAS_CONTENTS) != 0 \
4973 && (bfd_vma) s->filepos >= p->p_offset \
4974 && ((bfd_vma) s->filepos + s->size \
4975 <= p->p_offset + p->p_filesz))
4977 /* Decide if the given section should be included in the given segment.
4978 A section will be included if:
4979 1. It is within the address space of the segment -- we use the LMA
4980 if that is set for the segment and the VMA otherwise,
4981 2. It is an allocated segment,
4982 3. There is an output section associated with it,
4983 4. The section has not already been allocated to a previous segment.
4984 5. PT_GNU_STACK segments do not include any sections.
4985 6. PT_TLS segment includes only SHF_TLS sections.
4986 7. SHF_TLS sections are only in PT_TLS or PT_LOAD segments.
4987 8. PT_DYNAMIC should not contain empty sections at the beginning
4988 (with the possible exception of .dynamic). */
4989 #define IS_SECTION_IN_INPUT_SEGMENT(section, segment, bed) \
4990 ((((segment->p_paddr \
4991 ? IS_CONTAINED_BY_LMA (section, segment, segment->p_paddr) \
4992 : IS_CONTAINED_BY_VMA (section, segment)) \
4993 && (section->flags & SEC_ALLOC) != 0) \
4994 || IS_COREFILE_NOTE (segment, section)) \
4995 && segment->p_type != PT_GNU_STACK \
4996 && (segment->p_type != PT_TLS \
4997 || (section->flags & SEC_THREAD_LOCAL)) \
4998 && (segment->p_type == PT_LOAD \
4999 || segment->p_type == PT_TLS \
5000 || (section->flags & SEC_THREAD_LOCAL) == 0) \
5001 && (segment->p_type != PT_DYNAMIC \
5002 || SECTION_SIZE (section, segment) > 0 \
5003 || (segment->p_paddr \
5004 ? segment->p_paddr != section->lma \
5005 : segment->p_vaddr != section->vma) \
5006 || (strcmp (bfd_get_section_name (ibfd, section), ".dynamic") \
5008 && ! section->segment_mark)
5010 /* If the output section of a section in the input segment is NULL,
5011 it is removed from the corresponding output segment. */
5012 #define INCLUDE_SECTION_IN_SEGMENT(section, segment, bed) \
5013 (IS_SECTION_IN_INPUT_SEGMENT (section, segment, bed) \
5014 && section->output_section != NULL)
5016 /* Returns TRUE iff seg1 starts after the end of seg2. */
5017 #define SEGMENT_AFTER_SEGMENT(seg1, seg2, field) \
5018 (seg1->field >= SEGMENT_END (seg2, seg2->field))
5020 /* Returns TRUE iff seg1 and seg2 overlap. Segments overlap iff both
5021 their VMA address ranges and their LMA address ranges overlap.
5022 It is possible to have overlapping VMA ranges without overlapping LMA
5023 ranges. RedBoot images for example can have both .data and .bss mapped
5024 to the same VMA range, but with the .data section mapped to a different
5026 #define SEGMENT_OVERLAPS(seg1, seg2) \
5027 ( !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_vaddr) \
5028 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_vaddr)) \
5029 && !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_paddr) \
5030 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_paddr)))
5032 /* Initialise the segment mark field. */
5033 for (section
= ibfd
->sections
; section
!= NULL
; section
= section
->next
)
5034 section
->segment_mark
= FALSE
;
5036 /* Scan through the segments specified in the program header
5037 of the input BFD. For this first scan we look for overlaps
5038 in the loadable segments. These can be created by weird
5039 parameters to objcopy. Also, fix some solaris weirdness. */
5040 for (i
= 0, segment
= elf_tdata (ibfd
)->phdr
;
5045 Elf_Internal_Phdr
*segment2
;
5047 if (segment
->p_type
== PT_INTERP
)
5048 for (section
= ibfd
->sections
; section
; section
= section
->next
)
5049 if (IS_SOLARIS_PT_INTERP (segment
, section
))
5051 /* Mininal change so that the normal section to segment
5052 assignment code will work. */
5053 segment
->p_vaddr
= section
->vma
;
5057 if (segment
->p_type
!= PT_LOAD
)
5060 /* Determine if this segment overlaps any previous segments. */
5061 for (j
= 0, segment2
= elf_tdata (ibfd
)->phdr
; j
< i
; j
++, segment2
++)
5063 bfd_signed_vma extra_length
;
5065 if (segment2
->p_type
!= PT_LOAD
5066 || ! SEGMENT_OVERLAPS (segment
, segment2
))
5069 /* Merge the two segments together. */
5070 if (segment2
->p_vaddr
< segment
->p_vaddr
)
5072 /* Extend SEGMENT2 to include SEGMENT and then delete
5075 SEGMENT_END (segment
, segment
->p_vaddr
)
5076 - SEGMENT_END (segment2
, segment2
->p_vaddr
);
5078 if (extra_length
> 0)
5080 segment2
->p_memsz
+= extra_length
;
5081 segment2
->p_filesz
+= extra_length
;
5084 segment
->p_type
= PT_NULL
;
5086 /* Since we have deleted P we must restart the outer loop. */
5088 segment
= elf_tdata (ibfd
)->phdr
;
5093 /* Extend SEGMENT to include SEGMENT2 and then delete
5096 SEGMENT_END (segment2
, segment2
->p_vaddr
)
5097 - SEGMENT_END (segment
, segment
->p_vaddr
);
5099 if (extra_length
> 0)
5101 segment
->p_memsz
+= extra_length
;
5102 segment
->p_filesz
+= extra_length
;
5105 segment2
->p_type
= PT_NULL
;
5110 /* The second scan attempts to assign sections to segments. */
5111 for (i
= 0, segment
= elf_tdata (ibfd
)->phdr
;
5115 unsigned int section_count
;
5116 asection
** sections
;
5117 asection
* output_section
;
5119 bfd_vma matching_lma
;
5120 bfd_vma suggested_lma
;
5123 asection
* first_section
;
5125 if (segment
->p_type
== PT_NULL
)
5128 first_section
= NULL
;
5129 /* Compute how many sections might be placed into this segment. */
5130 for (section
= ibfd
->sections
, section_count
= 0;
5132 section
= section
->next
)
5134 /* Find the first section in the input segment, which may be
5135 removed from the corresponding output segment. */
5136 if (IS_SECTION_IN_INPUT_SEGMENT (section
, segment
, bed
))
5138 if (first_section
== NULL
)
5139 first_section
= section
;
5140 if (section
->output_section
!= NULL
)
5145 /* Allocate a segment map big enough to contain
5146 all of the sections we have selected. */
5147 amt
= sizeof (struct elf_segment_map
);
5148 amt
+= ((bfd_size_type
) section_count
- 1) * sizeof (asection
*);
5149 map
= bfd_zalloc (obfd
, amt
);
5153 /* Initialise the fields of the segment map. Default to
5154 using the physical address of the segment in the input BFD. */
5156 map
->p_type
= segment
->p_type
;
5157 map
->p_flags
= segment
->p_flags
;
5158 map
->p_flags_valid
= 1;
5160 /* If the first section in the input segment is removed, there is
5161 no need to preserve segment physical address in the corresponding
5163 if (!first_section
|| first_section
->output_section
!= NULL
)
5165 map
->p_paddr
= segment
->p_paddr
;
5166 map
->p_paddr_valid
= 1;
5169 /* Determine if this segment contains the ELF file header
5170 and if it contains the program headers themselves. */
5171 map
->includes_filehdr
= (segment
->p_offset
== 0
5172 && segment
->p_filesz
>= iehdr
->e_ehsize
);
5174 map
->includes_phdrs
= 0;
5176 if (! phdr_included
|| segment
->p_type
!= PT_LOAD
)
5178 map
->includes_phdrs
=
5179 (segment
->p_offset
<= (bfd_vma
) iehdr
->e_phoff
5180 && (segment
->p_offset
+ segment
->p_filesz
5181 >= ((bfd_vma
) iehdr
->e_phoff
5182 + iehdr
->e_phnum
* iehdr
->e_phentsize
)));
5184 if (segment
->p_type
== PT_LOAD
&& map
->includes_phdrs
)
5185 phdr_included
= TRUE
;
5188 if (section_count
== 0)
5190 /* Special segments, such as the PT_PHDR segment, may contain
5191 no sections, but ordinary, loadable segments should contain
5192 something. They are allowed by the ELF spec however, so only
5193 a warning is produced. */
5194 if (segment
->p_type
== PT_LOAD
)
5195 (*_bfd_error_handler
)
5196 (_("%B: warning: Empty loadable segment detected, is this intentional ?\n"),
5200 *pointer_to_map
= map
;
5201 pointer_to_map
= &map
->next
;
5206 /* Now scan the sections in the input BFD again and attempt
5207 to add their corresponding output sections to the segment map.
5208 The problem here is how to handle an output section which has
5209 been moved (ie had its LMA changed). There are four possibilities:
5211 1. None of the sections have been moved.
5212 In this case we can continue to use the segment LMA from the
5215 2. All of the sections have been moved by the same amount.
5216 In this case we can change the segment's LMA to match the LMA
5217 of the first section.
5219 3. Some of the sections have been moved, others have not.
5220 In this case those sections which have not been moved can be
5221 placed in the current segment which will have to have its size,
5222 and possibly its LMA changed, and a new segment or segments will
5223 have to be created to contain the other sections.
5225 4. The sections have been moved, but not by the same amount.
5226 In this case we can change the segment's LMA to match the LMA
5227 of the first section and we will have to create a new segment
5228 or segments to contain the other sections.
5230 In order to save time, we allocate an array to hold the section
5231 pointers that we are interested in. As these sections get assigned
5232 to a segment, they are removed from this array. */
5234 /* Gcc 2.96 miscompiles this code on mips. Don't do casting here
5235 to work around this long long bug. */
5236 sections
= bfd_malloc2 (section_count
, sizeof (asection
*));
5237 if (sections
== NULL
)
5240 /* Step One: Scan for segment vs section LMA conflicts.
5241 Also add the sections to the section array allocated above.
5242 Also add the sections to the current segment. In the common
5243 case, where the sections have not been moved, this means that
5244 we have completely filled the segment, and there is nothing
5250 for (j
= 0, section
= ibfd
->sections
;
5252 section
= section
->next
)
5254 if (INCLUDE_SECTION_IN_SEGMENT (section
, segment
, bed
))
5256 output_section
= section
->output_section
;
5258 sections
[j
++] = section
;
5260 /* The Solaris native linker always sets p_paddr to 0.
5261 We try to catch that case here, and set it to the
5262 correct value. Note - some backends require that
5263 p_paddr be left as zero. */
5264 if (segment
->p_paddr
== 0
5265 && segment
->p_vaddr
!= 0
5266 && (! bed
->want_p_paddr_set_to_zero
)
5268 && output_section
->lma
!= 0
5269 && (output_section
->vma
== (segment
->p_vaddr
5270 + (map
->includes_filehdr
5273 + (map
->includes_phdrs
5275 * iehdr
->e_phentsize
)
5277 map
->p_paddr
= segment
->p_vaddr
;
5279 /* Match up the physical address of the segment with the
5280 LMA address of the output section. */
5281 if (IS_CONTAINED_BY_LMA (output_section
, segment
, map
->p_paddr
)
5282 || IS_COREFILE_NOTE (segment
, section
)
5283 || (bed
->want_p_paddr_set_to_zero
&&
5284 IS_CONTAINED_BY_VMA (output_section
, segment
)))
5286 if (matching_lma
== 0)
5287 matching_lma
= output_section
->lma
;
5289 /* We assume that if the section fits within the segment
5290 then it does not overlap any other section within that
5292 map
->sections
[isec
++] = output_section
;
5294 else if (suggested_lma
== 0)
5295 suggested_lma
= output_section
->lma
;
5299 BFD_ASSERT (j
== section_count
);
5301 /* Step Two: Adjust the physical address of the current segment,
5303 if (isec
== section_count
)
5305 /* All of the sections fitted within the segment as currently
5306 specified. This is the default case. Add the segment to
5307 the list of built segments and carry on to process the next
5308 program header in the input BFD. */
5309 map
->count
= section_count
;
5310 *pointer_to_map
= map
;
5311 pointer_to_map
= &map
->next
;
5313 if (matching_lma
!= map
->p_paddr
5314 && !map
->includes_filehdr
&& !map
->includes_phdrs
)
5315 /* There is some padding before the first section in the
5316 segment. So, we must account for that in the output
5318 map
->p_vaddr_offset
= matching_lma
- map
->p_paddr
;
5325 if (matching_lma
!= 0)
5327 /* At least one section fits inside the current segment.
5328 Keep it, but modify its physical address to match the
5329 LMA of the first section that fitted. */
5330 map
->p_paddr
= matching_lma
;
5334 /* None of the sections fitted inside the current segment.
5335 Change the current segment's physical address to match
5336 the LMA of the first section. */
5337 map
->p_paddr
= suggested_lma
;
5340 /* Offset the segment physical address from the lma
5341 to allow for space taken up by elf headers. */
5342 if (map
->includes_filehdr
)
5343 map
->p_paddr
-= iehdr
->e_ehsize
;
5345 if (map
->includes_phdrs
)
5347 map
->p_paddr
-= iehdr
->e_phnum
* iehdr
->e_phentsize
;
5349 /* iehdr->e_phnum is just an estimate of the number
5350 of program headers that we will need. Make a note
5351 here of the number we used and the segment we chose
5352 to hold these headers, so that we can adjust the
5353 offset when we know the correct value. */
5354 phdr_adjust_num
= iehdr
->e_phnum
;
5355 phdr_adjust_seg
= map
;
5359 /* Step Three: Loop over the sections again, this time assigning
5360 those that fit to the current segment and removing them from the
5361 sections array; but making sure not to leave large gaps. Once all
5362 possible sections have been assigned to the current segment it is
5363 added to the list of built segments and if sections still remain
5364 to be assigned, a new segment is constructed before repeating
5372 /* Fill the current segment with sections that fit. */
5373 for (j
= 0; j
< section_count
; j
++)
5375 section
= sections
[j
];
5377 if (section
== NULL
)
5380 output_section
= section
->output_section
;
5382 BFD_ASSERT (output_section
!= NULL
);
5384 if (IS_CONTAINED_BY_LMA (output_section
, segment
, map
->p_paddr
)
5385 || IS_COREFILE_NOTE (segment
, section
))
5387 if (map
->count
== 0)
5389 /* If the first section in a segment does not start at
5390 the beginning of the segment, then something is
5392 if (output_section
->lma
!=
5394 + (map
->includes_filehdr
? iehdr
->e_ehsize
: 0)
5395 + (map
->includes_phdrs
5396 ? iehdr
->e_phnum
* iehdr
->e_phentsize
5402 asection
* prev_sec
;
5404 prev_sec
= map
->sections
[map
->count
- 1];
5406 /* If the gap between the end of the previous section
5407 and the start of this section is more than
5408 maxpagesize then we need to start a new segment. */
5409 if ((BFD_ALIGN (prev_sec
->lma
+ prev_sec
->size
,
5411 < BFD_ALIGN (output_section
->lma
, maxpagesize
))
5412 || ((prev_sec
->lma
+ prev_sec
->size
)
5413 > output_section
->lma
))
5415 if (suggested_lma
== 0)
5416 suggested_lma
= output_section
->lma
;
5422 map
->sections
[map
->count
++] = output_section
;
5425 section
->segment_mark
= TRUE
;
5427 else if (suggested_lma
== 0)
5428 suggested_lma
= output_section
->lma
;
5431 BFD_ASSERT (map
->count
> 0);
5433 /* Add the current segment to the list of built segments. */
5434 *pointer_to_map
= map
;
5435 pointer_to_map
= &map
->next
;
5437 if (isec
< section_count
)
5439 /* We still have not allocated all of the sections to
5440 segments. Create a new segment here, initialise it
5441 and carry on looping. */
5442 amt
= sizeof (struct elf_segment_map
);
5443 amt
+= ((bfd_size_type
) section_count
- 1) * sizeof (asection
*);
5444 map
= bfd_alloc (obfd
, amt
);
5451 /* Initialise the fields of the segment map. Set the physical
5452 physical address to the LMA of the first section that has
5453 not yet been assigned. */
5455 map
->p_type
= segment
->p_type
;
5456 map
->p_flags
= segment
->p_flags
;
5457 map
->p_flags_valid
= 1;
5458 map
->p_paddr
= suggested_lma
;
5459 map
->p_paddr_valid
= 1;
5460 map
->includes_filehdr
= 0;
5461 map
->includes_phdrs
= 0;
5464 while (isec
< section_count
);
5469 /* The Solaris linker creates program headers in which all the
5470 p_paddr fields are zero. When we try to objcopy or strip such a
5471 file, we get confused. Check for this case, and if we find it
5472 reset the p_paddr_valid fields. */
5473 for (map
= map_first
; map
!= NULL
; map
= map
->next
)
5474 if (map
->p_paddr
!= 0)
5477 for (map
= map_first
; map
!= NULL
; map
= map
->next
)
5478 map
->p_paddr_valid
= 0;
5480 elf_tdata (obfd
)->segment_map
= map_first
;
5482 /* If we had to estimate the number of program headers that were
5483 going to be needed, then check our estimate now and adjust
5484 the offset if necessary. */
5485 if (phdr_adjust_seg
!= NULL
)
5489 for (count
= 0, map
= map_first
; map
!= NULL
; map
= map
->next
)
5492 if (count
> phdr_adjust_num
)
5493 phdr_adjust_seg
->p_paddr
5494 -= (count
- phdr_adjust_num
) * iehdr
->e_phentsize
;
5499 #undef IS_CONTAINED_BY_VMA
5500 #undef IS_CONTAINED_BY_LMA
5501 #undef IS_COREFILE_NOTE
5502 #undef IS_SOLARIS_PT_INTERP
5503 #undef IS_SECTION_IN_INPUT_SEGMENT
5504 #undef INCLUDE_SECTION_IN_SEGMENT
5505 #undef SEGMENT_AFTER_SEGMENT
5506 #undef SEGMENT_OVERLAPS
5510 /* Copy ELF program header information. */
5513 copy_elf_program_header (bfd
*ibfd
, bfd
*obfd
)
5515 Elf_Internal_Ehdr
*iehdr
;
5516 struct elf_segment_map
*map
;
5517 struct elf_segment_map
*map_first
;
5518 struct elf_segment_map
**pointer_to_map
;
5519 Elf_Internal_Phdr
*segment
;
5521 unsigned int num_segments
;
5522 bfd_boolean phdr_included
= FALSE
;
5524 iehdr
= elf_elfheader (ibfd
);
5527 pointer_to_map
= &map_first
;
5529 num_segments
= elf_elfheader (ibfd
)->e_phnum
;
5530 for (i
= 0, segment
= elf_tdata (ibfd
)->phdr
;
5535 unsigned int section_count
;
5537 Elf_Internal_Shdr
*this_hdr
;
5538 asection
*first_section
= NULL
;
5540 /* FIXME: Do we need to copy PT_NULL segment? */
5541 if (segment
->p_type
== PT_NULL
)
5544 /* Compute how many sections are in this segment. */
5545 for (section
= ibfd
->sections
, section_count
= 0;
5547 section
= section
->next
)
5549 this_hdr
= &(elf_section_data(section
)->this_hdr
);
5550 if (ELF_IS_SECTION_IN_SEGMENT_FILE (this_hdr
, segment
))
5553 first_section
= section
;
5558 /* Allocate a segment map big enough to contain
5559 all of the sections we have selected. */
5560 amt
= sizeof (struct elf_segment_map
);
5561 if (section_count
!= 0)
5562 amt
+= ((bfd_size_type
) section_count
- 1) * sizeof (asection
*);
5563 map
= bfd_zalloc (obfd
, amt
);
5567 /* Initialize the fields of the output segment map with the
5570 map
->p_type
= segment
->p_type
;
5571 map
->p_flags
= segment
->p_flags
;
5572 map
->p_flags_valid
= 1;
5573 map
->p_paddr
= segment
->p_paddr
;
5574 map
->p_paddr_valid
= 1;
5575 map
->p_align
= segment
->p_align
;
5576 map
->p_align_valid
= 1;
5577 map
->p_vaddr_offset
= 0;
5579 /* Determine if this segment contains the ELF file header
5580 and if it contains the program headers themselves. */
5581 map
->includes_filehdr
= (segment
->p_offset
== 0
5582 && segment
->p_filesz
>= iehdr
->e_ehsize
);
5584 map
->includes_phdrs
= 0;
5585 if (! phdr_included
|| segment
->p_type
!= PT_LOAD
)
5587 map
->includes_phdrs
=
5588 (segment
->p_offset
<= (bfd_vma
) iehdr
->e_phoff
5589 && (segment
->p_offset
+ segment
->p_filesz
5590 >= ((bfd_vma
) iehdr
->e_phoff
5591 + iehdr
->e_phnum
* iehdr
->e_phentsize
)));
5593 if (segment
->p_type
== PT_LOAD
&& map
->includes_phdrs
)
5594 phdr_included
= TRUE
;
5597 if (!map
->includes_phdrs
&& !map
->includes_filehdr
)
5598 /* There is some other padding before the first section. */
5599 map
->p_vaddr_offset
= ((first_section
? first_section
->lma
: 0)
5600 - segment
->p_paddr
);
5602 if (section_count
!= 0)
5604 unsigned int isec
= 0;
5606 for (section
= first_section
;
5608 section
= section
->next
)
5610 this_hdr
= &(elf_section_data(section
)->this_hdr
);
5611 if (ELF_IS_SECTION_IN_SEGMENT_FILE (this_hdr
, segment
))
5613 map
->sections
[isec
++] = section
->output_section
;
5614 if (isec
== section_count
)
5620 map
->count
= section_count
;
5621 *pointer_to_map
= map
;
5622 pointer_to_map
= &map
->next
;
5625 elf_tdata (obfd
)->segment_map
= map_first
;
5629 /* Copy private BFD data. This copies or rewrites ELF program header
5633 copy_private_bfd_data (bfd
*ibfd
, bfd
*obfd
)
5635 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
5636 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
5639 if (elf_tdata (ibfd
)->phdr
== NULL
)
5642 if (ibfd
->xvec
== obfd
->xvec
)
5644 /* Check to see if any sections in the input BFD
5645 covered by ELF program header have changed. */
5646 Elf_Internal_Phdr
*segment
;
5647 asection
*section
, *osec
;
5648 unsigned int i
, num_segments
;
5649 Elf_Internal_Shdr
*this_hdr
;
5651 /* Initialize the segment mark field. */
5652 for (section
= obfd
->sections
; section
!= NULL
;
5653 section
= section
->next
)
5654 section
->segment_mark
= FALSE
;
5656 num_segments
= elf_elfheader (ibfd
)->e_phnum
;
5657 for (i
= 0, segment
= elf_tdata (ibfd
)->phdr
;
5661 /* PR binutils/3535. The Solaris linker always sets the p_paddr
5662 and p_memsz fields of special segments (DYNAMIC, INTERP) to 0
5663 which severly confuses things, so always regenerate the segment
5664 map in this case. */
5665 if (segment
->p_paddr
== 0
5666 && segment
->p_memsz
== 0
5667 && (segment
->p_type
== PT_INTERP
|| segment
->p_type
== PT_DYNAMIC
))
5670 for (section
= ibfd
->sections
;
5671 section
!= NULL
; section
= section
->next
)
5673 /* We mark the output section so that we know it comes
5674 from the input BFD. */
5675 osec
= section
->output_section
;
5677 osec
->segment_mark
= TRUE
;
5679 /* Check if this section is covered by the segment. */
5680 this_hdr
= &(elf_section_data(section
)->this_hdr
);
5681 if (ELF_IS_SECTION_IN_SEGMENT_FILE (this_hdr
, segment
))
5683 /* FIXME: Check if its output section is changed or
5684 removed. What else do we need to check? */
5686 || section
->flags
!= osec
->flags
5687 || section
->lma
!= osec
->lma
5688 || section
->vma
!= osec
->vma
5689 || section
->size
!= osec
->size
5690 || section
->rawsize
!= osec
->rawsize
5691 || section
->alignment_power
!= osec
->alignment_power
)
5697 /* Check to see if any output section do not come from the
5699 for (section
= obfd
->sections
; section
!= NULL
;
5700 section
= section
->next
)
5702 if (section
->segment_mark
== FALSE
)
5705 section
->segment_mark
= FALSE
;
5708 return copy_elf_program_header (ibfd
, obfd
);
5712 return rewrite_elf_program_header (ibfd
, obfd
);
5715 /* Initialize private output section information from input section. */
5718 _bfd_elf_init_private_section_data (bfd
*ibfd
,
5722 struct bfd_link_info
*link_info
)
5725 Elf_Internal_Shdr
*ihdr
, *ohdr
;
5726 bfd_boolean need_group
= link_info
== NULL
|| link_info
->relocatable
;
5728 if (ibfd
->xvec
->flavour
!= bfd_target_elf_flavour
5729 || obfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
5732 /* Don't copy the output ELF section type from input if the
5733 output BFD section flags have been set to something different.
5734 elf_fake_sections will set ELF section type based on BFD
5736 if (elf_section_type (osec
) == SHT_NULL
5737 && (osec
->flags
== isec
->flags
|| !osec
->flags
))
5738 elf_section_type (osec
) = elf_section_type (isec
);
5740 /* FIXME: Is this correct for all OS/PROC specific flags? */
5741 elf_section_flags (osec
) |= (elf_section_flags (isec
)
5742 & (SHF_MASKOS
| SHF_MASKPROC
));
5744 /* Set things up for objcopy and relocatable link. The output
5745 SHT_GROUP section will have its elf_next_in_group pointing back
5746 to the input group members. Ignore linker created group section.
5747 See elfNN_ia64_object_p in elfxx-ia64.c. */
5750 if (elf_sec_group (isec
) == NULL
5751 || (elf_sec_group (isec
)->flags
& SEC_LINKER_CREATED
) == 0)
5753 if (elf_section_flags (isec
) & SHF_GROUP
)
5754 elf_section_flags (osec
) |= SHF_GROUP
;
5755 elf_next_in_group (osec
) = elf_next_in_group (isec
);
5756 elf_group_name (osec
) = elf_group_name (isec
);
5760 ihdr
= &elf_section_data (isec
)->this_hdr
;
5762 /* We need to handle elf_linked_to_section for SHF_LINK_ORDER. We
5763 don't use the output section of the linked-to section since it
5764 may be NULL at this point. */
5765 if ((ihdr
->sh_flags
& SHF_LINK_ORDER
) != 0)
5767 ohdr
= &elf_section_data (osec
)->this_hdr
;
5768 ohdr
->sh_flags
|= SHF_LINK_ORDER
;
5769 elf_linked_to_section (osec
) = elf_linked_to_section (isec
);
5772 osec
->use_rela_p
= isec
->use_rela_p
;
5777 /* Copy private section information. This copies over the entsize
5778 field, and sometimes the info field. */
5781 _bfd_elf_copy_private_section_data (bfd
*ibfd
,
5786 Elf_Internal_Shdr
*ihdr
, *ohdr
;
5788 if (ibfd
->xvec
->flavour
!= bfd_target_elf_flavour
5789 || obfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
5792 ihdr
= &elf_section_data (isec
)->this_hdr
;
5793 ohdr
= &elf_section_data (osec
)->this_hdr
;
5795 ohdr
->sh_entsize
= ihdr
->sh_entsize
;
5797 if (ihdr
->sh_type
== SHT_SYMTAB
5798 || ihdr
->sh_type
== SHT_DYNSYM
5799 || ihdr
->sh_type
== SHT_GNU_verneed
5800 || ihdr
->sh_type
== SHT_GNU_verdef
)
5801 ohdr
->sh_info
= ihdr
->sh_info
;
5803 return _bfd_elf_init_private_section_data (ibfd
, isec
, obfd
, osec
,
5807 /* Copy private header information. */
5810 _bfd_elf_copy_private_header_data (bfd
*ibfd
, bfd
*obfd
)
5814 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
5815 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
5818 /* Copy over private BFD data if it has not already been copied.
5819 This must be done here, rather than in the copy_private_bfd_data
5820 entry point, because the latter is called after the section
5821 contents have been set, which means that the program headers have
5822 already been worked out. */
5823 if (elf_tdata (obfd
)->segment_map
== NULL
&& elf_tdata (ibfd
)->phdr
!= NULL
)
5825 if (! copy_private_bfd_data (ibfd
, obfd
))
5829 /* _bfd_elf_copy_private_section_data copied over the SHF_GROUP flag
5830 but this might be wrong if we deleted the group section. */
5831 for (isec
= ibfd
->sections
; isec
!= NULL
; isec
= isec
->next
)
5832 if (elf_section_type (isec
) == SHT_GROUP
5833 && isec
->output_section
== NULL
)
5835 asection
*first
= elf_next_in_group (isec
);
5836 asection
*s
= first
;
5839 if (s
->output_section
!= NULL
)
5841 elf_section_flags (s
->output_section
) &= ~SHF_GROUP
;
5842 elf_group_name (s
->output_section
) = NULL
;
5844 s
= elf_next_in_group (s
);
5853 /* Copy private symbol information. If this symbol is in a section
5854 which we did not map into a BFD section, try to map the section
5855 index correctly. We use special macro definitions for the mapped
5856 section indices; these definitions are interpreted by the
5857 swap_out_syms function. */
5859 #define MAP_ONESYMTAB (SHN_HIOS + 1)
5860 #define MAP_DYNSYMTAB (SHN_HIOS + 2)
5861 #define MAP_STRTAB (SHN_HIOS + 3)
5862 #define MAP_SHSTRTAB (SHN_HIOS + 4)
5863 #define MAP_SYM_SHNDX (SHN_HIOS + 5)
5866 _bfd_elf_copy_private_symbol_data (bfd
*ibfd
,
5871 elf_symbol_type
*isym
, *osym
;
5873 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
5874 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
5877 isym
= elf_symbol_from (ibfd
, isymarg
);
5878 osym
= elf_symbol_from (obfd
, osymarg
);
5882 && bfd_is_abs_section (isym
->symbol
.section
))
5886 shndx
= isym
->internal_elf_sym
.st_shndx
;
5887 if (shndx
== elf_onesymtab (ibfd
))
5888 shndx
= MAP_ONESYMTAB
;
5889 else if (shndx
== elf_dynsymtab (ibfd
))
5890 shndx
= MAP_DYNSYMTAB
;
5891 else if (shndx
== elf_tdata (ibfd
)->strtab_section
)
5893 else if (shndx
== elf_tdata (ibfd
)->shstrtab_section
)
5894 shndx
= MAP_SHSTRTAB
;
5895 else if (shndx
== elf_tdata (ibfd
)->symtab_shndx_section
)
5896 shndx
= MAP_SYM_SHNDX
;
5897 osym
->internal_elf_sym
.st_shndx
= shndx
;
5903 /* Swap out the symbols. */
5906 swap_out_syms (bfd
*abfd
,
5907 struct bfd_strtab_hash
**sttp
,
5910 const struct elf_backend_data
*bed
;
5913 struct bfd_strtab_hash
*stt
;
5914 Elf_Internal_Shdr
*symtab_hdr
;
5915 Elf_Internal_Shdr
*symtab_shndx_hdr
;
5916 Elf_Internal_Shdr
*symstrtab_hdr
;
5917 bfd_byte
*outbound_syms
;
5918 bfd_byte
*outbound_shndx
;
5921 bfd_boolean name_local_sections
;
5923 if (!elf_map_symbols (abfd
))
5926 /* Dump out the symtabs. */
5927 stt
= _bfd_elf_stringtab_init ();
5931 bed
= get_elf_backend_data (abfd
);
5932 symcount
= bfd_get_symcount (abfd
);
5933 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
5934 symtab_hdr
->sh_type
= SHT_SYMTAB
;
5935 symtab_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
5936 symtab_hdr
->sh_size
= symtab_hdr
->sh_entsize
* (symcount
+ 1);
5937 symtab_hdr
->sh_info
= elf_num_locals (abfd
) + 1;
5938 symtab_hdr
->sh_addralign
= 1 << bed
->s
->log_file_align
;
5940 symstrtab_hdr
= &elf_tdata (abfd
)->strtab_hdr
;
5941 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
5943 outbound_syms
= bfd_alloc2 (abfd
, 1 + symcount
, bed
->s
->sizeof_sym
);
5944 if (outbound_syms
== NULL
)
5946 _bfd_stringtab_free (stt
);
5949 symtab_hdr
->contents
= outbound_syms
;
5951 outbound_shndx
= NULL
;
5952 symtab_shndx_hdr
= &elf_tdata (abfd
)->symtab_shndx_hdr
;
5953 if (symtab_shndx_hdr
->sh_name
!= 0)
5955 amt
= (bfd_size_type
) (1 + symcount
) * sizeof (Elf_External_Sym_Shndx
);
5956 outbound_shndx
= bfd_zalloc2 (abfd
, 1 + symcount
,
5957 sizeof (Elf_External_Sym_Shndx
));
5958 if (outbound_shndx
== NULL
)
5960 _bfd_stringtab_free (stt
);
5964 symtab_shndx_hdr
->contents
= outbound_shndx
;
5965 symtab_shndx_hdr
->sh_type
= SHT_SYMTAB_SHNDX
;
5966 symtab_shndx_hdr
->sh_size
= amt
;
5967 symtab_shndx_hdr
->sh_addralign
= sizeof (Elf_External_Sym_Shndx
);
5968 symtab_shndx_hdr
->sh_entsize
= sizeof (Elf_External_Sym_Shndx
);
5971 /* Now generate the data (for "contents"). */
5973 /* Fill in zeroth symbol and swap it out. */
5974 Elf_Internal_Sym sym
;
5980 sym
.st_shndx
= SHN_UNDEF
;
5981 bed
->s
->swap_symbol_out (abfd
, &sym
, outbound_syms
, outbound_shndx
);
5982 outbound_syms
+= bed
->s
->sizeof_sym
;
5983 if (outbound_shndx
!= NULL
)
5984 outbound_shndx
+= sizeof (Elf_External_Sym_Shndx
);
5988 = (bed
->elf_backend_name_local_section_symbols
5989 && bed
->elf_backend_name_local_section_symbols (abfd
));
5991 syms
= bfd_get_outsymbols (abfd
);
5992 for (idx
= 0; idx
< symcount
; idx
++)
5994 Elf_Internal_Sym sym
;
5995 bfd_vma value
= syms
[idx
]->value
;
5996 elf_symbol_type
*type_ptr
;
5997 flagword flags
= syms
[idx
]->flags
;
6000 if (!name_local_sections
6001 && (flags
& (BSF_SECTION_SYM
| BSF_GLOBAL
)) == BSF_SECTION_SYM
)
6003 /* Local section symbols have no name. */
6008 sym
.st_name
= (unsigned long) _bfd_stringtab_add (stt
,
6011 if (sym
.st_name
== (unsigned long) -1)
6013 _bfd_stringtab_free (stt
);
6018 type_ptr
= elf_symbol_from (abfd
, syms
[idx
]);
6020 if ((flags
& BSF_SECTION_SYM
) == 0
6021 && bfd_is_com_section (syms
[idx
]->section
))
6023 /* ELF common symbols put the alignment into the `value' field,
6024 and the size into the `size' field. This is backwards from
6025 how BFD handles it, so reverse it here. */
6026 sym
.st_size
= value
;
6027 if (type_ptr
== NULL
6028 || type_ptr
->internal_elf_sym
.st_value
== 0)
6029 sym
.st_value
= value
>= 16 ? 16 : (1 << bfd_log2 (value
));
6031 sym
.st_value
= type_ptr
->internal_elf_sym
.st_value
;
6032 sym
.st_shndx
= _bfd_elf_section_from_bfd_section
6033 (abfd
, syms
[idx
]->section
);
6037 asection
*sec
= syms
[idx
]->section
;
6040 if (sec
->output_section
)
6042 value
+= sec
->output_offset
;
6043 sec
= sec
->output_section
;
6046 /* Don't add in the section vma for relocatable output. */
6047 if (! relocatable_p
)
6049 sym
.st_value
= value
;
6050 sym
.st_size
= type_ptr
? type_ptr
->internal_elf_sym
.st_size
: 0;
6052 if (bfd_is_abs_section (sec
)
6054 && type_ptr
->internal_elf_sym
.st_shndx
!= 0)
6056 /* This symbol is in a real ELF section which we did
6057 not create as a BFD section. Undo the mapping done
6058 by copy_private_symbol_data. */
6059 shndx
= type_ptr
->internal_elf_sym
.st_shndx
;
6063 shndx
= elf_onesymtab (abfd
);
6066 shndx
= elf_dynsymtab (abfd
);
6069 shndx
= elf_tdata (abfd
)->strtab_section
;
6072 shndx
= elf_tdata (abfd
)->shstrtab_section
;
6075 shndx
= elf_tdata (abfd
)->symtab_shndx_section
;
6083 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec
);
6089 /* Writing this would be a hell of a lot easier if
6090 we had some decent documentation on bfd, and
6091 knew what to expect of the library, and what to
6092 demand of applications. For example, it
6093 appears that `objcopy' might not set the
6094 section of a symbol to be a section that is
6095 actually in the output file. */
6096 sec2
= bfd_get_section_by_name (abfd
, sec
->name
);
6099 _bfd_error_handler (_("\
6100 Unable to find equivalent output section for symbol '%s' from section '%s'"),
6101 syms
[idx
]->name
? syms
[idx
]->name
: "<Local sym>",
6103 bfd_set_error (bfd_error_invalid_operation
);
6104 _bfd_stringtab_free (stt
);
6108 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec2
);
6109 BFD_ASSERT (shndx
!= -1);
6113 sym
.st_shndx
= shndx
;
6116 if ((flags
& BSF_THREAD_LOCAL
) != 0)
6118 else if ((flags
& BSF_FUNCTION
) != 0)
6120 else if ((flags
& BSF_OBJECT
) != 0)
6122 else if ((flags
& BSF_RELC
) != 0)
6124 else if ((flags
& BSF_SRELC
) != 0)
6129 if (syms
[idx
]->section
->flags
& SEC_THREAD_LOCAL
)
6132 /* Processor-specific types. */
6133 if (type_ptr
!= NULL
6134 && bed
->elf_backend_get_symbol_type
)
6135 type
= ((*bed
->elf_backend_get_symbol_type
)
6136 (&type_ptr
->internal_elf_sym
, type
));
6138 if (flags
& BSF_SECTION_SYM
)
6140 if (flags
& BSF_GLOBAL
)
6141 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, STT_SECTION
);
6143 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_SECTION
);
6145 else if (bfd_is_com_section (syms
[idx
]->section
))
6146 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, type
);
6147 else if (bfd_is_und_section (syms
[idx
]->section
))
6148 sym
.st_info
= ELF_ST_INFO (((flags
& BSF_WEAK
)
6152 else if (flags
& BSF_FILE
)
6153 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FILE
);
6156 int bind
= STB_LOCAL
;
6158 if (flags
& BSF_LOCAL
)
6160 else if (flags
& BSF_WEAK
)
6162 else if (flags
& BSF_GLOBAL
)
6165 sym
.st_info
= ELF_ST_INFO (bind
, type
);
6168 if (type_ptr
!= NULL
)
6169 sym
.st_other
= type_ptr
->internal_elf_sym
.st_other
;
6173 bed
->s
->swap_symbol_out (abfd
, &sym
, outbound_syms
, outbound_shndx
);
6174 outbound_syms
+= bed
->s
->sizeof_sym
;
6175 if (outbound_shndx
!= NULL
)
6176 outbound_shndx
+= sizeof (Elf_External_Sym_Shndx
);
6180 symstrtab_hdr
->sh_size
= _bfd_stringtab_size (stt
);
6181 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
6183 symstrtab_hdr
->sh_flags
= 0;
6184 symstrtab_hdr
->sh_addr
= 0;
6185 symstrtab_hdr
->sh_entsize
= 0;
6186 symstrtab_hdr
->sh_link
= 0;
6187 symstrtab_hdr
->sh_info
= 0;
6188 symstrtab_hdr
->sh_addralign
= 1;
6193 /* Return the number of bytes required to hold the symtab vector.
6195 Note that we base it on the count plus 1, since we will null terminate
6196 the vector allocated based on this size. However, the ELF symbol table
6197 always has a dummy entry as symbol #0, so it ends up even. */
6200 _bfd_elf_get_symtab_upper_bound (bfd
*abfd
)
6204 Elf_Internal_Shdr
*hdr
= &elf_tdata (abfd
)->symtab_hdr
;
6206 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
6207 symtab_size
= (symcount
+ 1) * (sizeof (asymbol
*));
6209 symtab_size
-= sizeof (asymbol
*);
6215 _bfd_elf_get_dynamic_symtab_upper_bound (bfd
*abfd
)
6219 Elf_Internal_Shdr
*hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
6221 if (elf_dynsymtab (abfd
) == 0)
6223 bfd_set_error (bfd_error_invalid_operation
);
6227 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
6228 symtab_size
= (symcount
+ 1) * (sizeof (asymbol
*));
6230 symtab_size
-= sizeof (asymbol
*);
6236 _bfd_elf_get_reloc_upper_bound (bfd
*abfd ATTRIBUTE_UNUSED
,
6239 return (asect
->reloc_count
+ 1) * sizeof (arelent
*);
6242 /* Canonicalize the relocs. */
6245 _bfd_elf_canonicalize_reloc (bfd
*abfd
,
6252 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
6254 if (! bed
->s
->slurp_reloc_table (abfd
, section
, symbols
, FALSE
))
6257 tblptr
= section
->relocation
;
6258 for (i
= 0; i
< section
->reloc_count
; i
++)
6259 *relptr
++ = tblptr
++;
6263 return section
->reloc_count
;
6267 _bfd_elf_canonicalize_symtab (bfd
*abfd
, asymbol
**allocation
)
6269 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
6270 long symcount
= bed
->s
->slurp_symbol_table (abfd
, allocation
, FALSE
);
6273 bfd_get_symcount (abfd
) = symcount
;
6278 _bfd_elf_canonicalize_dynamic_symtab (bfd
*abfd
,
6279 asymbol
**allocation
)
6281 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
6282 long symcount
= bed
->s
->slurp_symbol_table (abfd
, allocation
, TRUE
);
6285 bfd_get_dynamic_symcount (abfd
) = symcount
;
6289 /* Return the size required for the dynamic reloc entries. Any loadable
6290 section that was actually installed in the BFD, and has type SHT_REL
6291 or SHT_RELA, and uses the dynamic symbol table, is considered to be a
6292 dynamic reloc section. */
6295 _bfd_elf_get_dynamic_reloc_upper_bound (bfd
*abfd
)
6300 if (elf_dynsymtab (abfd
) == 0)
6302 bfd_set_error (bfd_error_invalid_operation
);
6306 ret
= sizeof (arelent
*);
6307 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
6308 if ((s
->flags
& SEC_LOAD
) != 0
6309 && elf_section_data (s
)->this_hdr
.sh_link
== elf_dynsymtab (abfd
)
6310 && (elf_section_data (s
)->this_hdr
.sh_type
== SHT_REL
6311 || elf_section_data (s
)->this_hdr
.sh_type
== SHT_RELA
))
6312 ret
+= ((s
->size
/ elf_section_data (s
)->this_hdr
.sh_entsize
)
6313 * sizeof (arelent
*));
6318 /* Canonicalize the dynamic relocation entries. Note that we return the
6319 dynamic relocations as a single block, although they are actually
6320 associated with particular sections; the interface, which was
6321 designed for SunOS style shared libraries, expects that there is only
6322 one set of dynamic relocs. Any loadable section that was actually
6323 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses the
6324 dynamic symbol table, is considered to be a dynamic reloc section. */
6327 _bfd_elf_canonicalize_dynamic_reloc (bfd
*abfd
,
6331 bfd_boolean (*slurp_relocs
) (bfd
*, asection
*, asymbol
**, bfd_boolean
);
6335 if (elf_dynsymtab (abfd
) == 0)
6337 bfd_set_error (bfd_error_invalid_operation
);
6341 slurp_relocs
= get_elf_backend_data (abfd
)->s
->slurp_reloc_table
;
6343 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
6345 if ((s
->flags
& SEC_LOAD
) != 0
6346 && elf_section_data (s
)->this_hdr
.sh_link
== elf_dynsymtab (abfd
)
6347 && (elf_section_data (s
)->this_hdr
.sh_type
== SHT_REL
6348 || elf_section_data (s
)->this_hdr
.sh_type
== SHT_RELA
))
6353 if (! (*slurp_relocs
) (abfd
, s
, syms
, TRUE
))
6355 count
= s
->size
/ elf_section_data (s
)->this_hdr
.sh_entsize
;
6357 for (i
= 0; i
< count
; i
++)
6368 /* Read in the version information. */
6371 _bfd_elf_slurp_version_tables (bfd
*abfd
, bfd_boolean default_imported_symver
)
6373 bfd_byte
*contents
= NULL
;
6374 unsigned int freeidx
= 0;
6376 if (elf_dynverref (abfd
) != 0)
6378 Elf_Internal_Shdr
*hdr
;
6379 Elf_External_Verneed
*everneed
;
6380 Elf_Internal_Verneed
*iverneed
;
6382 bfd_byte
*contents_end
;
6384 hdr
= &elf_tdata (abfd
)->dynverref_hdr
;
6386 elf_tdata (abfd
)->verref
= bfd_zalloc2 (abfd
, hdr
->sh_info
,
6387 sizeof (Elf_Internal_Verneed
));
6388 if (elf_tdata (abfd
)->verref
== NULL
)
6391 elf_tdata (abfd
)->cverrefs
= hdr
->sh_info
;
6393 contents
= bfd_malloc (hdr
->sh_size
);
6394 if (contents
== NULL
)
6396 error_return_verref
:
6397 elf_tdata (abfd
)->verref
= NULL
;
6398 elf_tdata (abfd
)->cverrefs
= 0;
6401 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
6402 || bfd_bread (contents
, hdr
->sh_size
, abfd
) != hdr
->sh_size
)
6403 goto error_return_verref
;
6405 if (hdr
->sh_info
&& hdr
->sh_size
< sizeof (Elf_External_Verneed
))
6406 goto error_return_verref
;
6408 BFD_ASSERT (sizeof (Elf_External_Verneed
)
6409 == sizeof (Elf_External_Vernaux
));
6410 contents_end
= contents
+ hdr
->sh_size
- sizeof (Elf_External_Verneed
);
6411 everneed
= (Elf_External_Verneed
*) contents
;
6412 iverneed
= elf_tdata (abfd
)->verref
;
6413 for (i
= 0; i
< hdr
->sh_info
; i
++, iverneed
++)
6415 Elf_External_Vernaux
*evernaux
;
6416 Elf_Internal_Vernaux
*ivernaux
;
6419 _bfd_elf_swap_verneed_in (abfd
, everneed
, iverneed
);
6421 iverneed
->vn_bfd
= abfd
;
6423 iverneed
->vn_filename
=
6424 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
6426 if (iverneed
->vn_filename
== NULL
)
6427 goto error_return_verref
;
6429 if (iverneed
->vn_cnt
== 0)
6430 iverneed
->vn_auxptr
= NULL
;
6433 iverneed
->vn_auxptr
= bfd_alloc2 (abfd
, iverneed
->vn_cnt
,
6434 sizeof (Elf_Internal_Vernaux
));
6435 if (iverneed
->vn_auxptr
== NULL
)
6436 goto error_return_verref
;
6439 if (iverneed
->vn_aux
6440 > (size_t) (contents_end
- (bfd_byte
*) everneed
))
6441 goto error_return_verref
;
6443 evernaux
= ((Elf_External_Vernaux
*)
6444 ((bfd_byte
*) everneed
+ iverneed
->vn_aux
));
6445 ivernaux
= iverneed
->vn_auxptr
;
6446 for (j
= 0; j
< iverneed
->vn_cnt
; j
++, ivernaux
++)
6448 _bfd_elf_swap_vernaux_in (abfd
, evernaux
, ivernaux
);
6450 ivernaux
->vna_nodename
=
6451 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
6452 ivernaux
->vna_name
);
6453 if (ivernaux
->vna_nodename
== NULL
)
6454 goto error_return_verref
;
6456 if (j
+ 1 < iverneed
->vn_cnt
)
6457 ivernaux
->vna_nextptr
= ivernaux
+ 1;
6459 ivernaux
->vna_nextptr
= NULL
;
6461 if (ivernaux
->vna_next
6462 > (size_t) (contents_end
- (bfd_byte
*) evernaux
))
6463 goto error_return_verref
;
6465 evernaux
= ((Elf_External_Vernaux
*)
6466 ((bfd_byte
*) evernaux
+ ivernaux
->vna_next
));
6468 if (ivernaux
->vna_other
> freeidx
)
6469 freeidx
= ivernaux
->vna_other
;
6472 if (i
+ 1 < hdr
->sh_info
)
6473 iverneed
->vn_nextref
= iverneed
+ 1;
6475 iverneed
->vn_nextref
= NULL
;
6477 if (iverneed
->vn_next
6478 > (size_t) (contents_end
- (bfd_byte
*) everneed
))
6479 goto error_return_verref
;
6481 everneed
= ((Elf_External_Verneed
*)
6482 ((bfd_byte
*) everneed
+ iverneed
->vn_next
));
6489 if (elf_dynverdef (abfd
) != 0)
6491 Elf_Internal_Shdr
*hdr
;
6492 Elf_External_Verdef
*everdef
;
6493 Elf_Internal_Verdef
*iverdef
;
6494 Elf_Internal_Verdef
*iverdefarr
;
6495 Elf_Internal_Verdef iverdefmem
;
6497 unsigned int maxidx
;
6498 bfd_byte
*contents_end_def
, *contents_end_aux
;
6500 hdr
= &elf_tdata (abfd
)->dynverdef_hdr
;
6502 contents
= bfd_malloc (hdr
->sh_size
);
6503 if (contents
== NULL
)
6505 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
6506 || bfd_bread (contents
, hdr
->sh_size
, abfd
) != hdr
->sh_size
)
6509 if (hdr
->sh_info
&& hdr
->sh_size
< sizeof (Elf_External_Verdef
))
6512 BFD_ASSERT (sizeof (Elf_External_Verdef
)
6513 >= sizeof (Elf_External_Verdaux
));
6514 contents_end_def
= contents
+ hdr
->sh_size
6515 - sizeof (Elf_External_Verdef
);
6516 contents_end_aux
= contents
+ hdr
->sh_size
6517 - sizeof (Elf_External_Verdaux
);
6519 /* We know the number of entries in the section but not the maximum
6520 index. Therefore we have to run through all entries and find
6522 everdef
= (Elf_External_Verdef
*) contents
;
6524 for (i
= 0; i
< hdr
->sh_info
; ++i
)
6526 _bfd_elf_swap_verdef_in (abfd
, everdef
, &iverdefmem
);
6528 if ((iverdefmem
.vd_ndx
& ((unsigned) VERSYM_VERSION
)) > maxidx
)
6529 maxidx
= iverdefmem
.vd_ndx
& ((unsigned) VERSYM_VERSION
);
6531 if (iverdefmem
.vd_next
6532 > (size_t) (contents_end_def
- (bfd_byte
*) everdef
))
6535 everdef
= ((Elf_External_Verdef
*)
6536 ((bfd_byte
*) everdef
+ iverdefmem
.vd_next
));
6539 if (default_imported_symver
)
6541 if (freeidx
> maxidx
)
6546 elf_tdata (abfd
)->verdef
= bfd_zalloc2 (abfd
, maxidx
,
6547 sizeof (Elf_Internal_Verdef
));
6548 if (elf_tdata (abfd
)->verdef
== NULL
)
6551 elf_tdata (abfd
)->cverdefs
= maxidx
;
6553 everdef
= (Elf_External_Verdef
*) contents
;
6554 iverdefarr
= elf_tdata (abfd
)->verdef
;
6555 for (i
= 0; i
< hdr
->sh_info
; i
++)
6557 Elf_External_Verdaux
*everdaux
;
6558 Elf_Internal_Verdaux
*iverdaux
;
6561 _bfd_elf_swap_verdef_in (abfd
, everdef
, &iverdefmem
);
6563 if ((iverdefmem
.vd_ndx
& VERSYM_VERSION
) == 0)
6565 error_return_verdef
:
6566 elf_tdata (abfd
)->verdef
= NULL
;
6567 elf_tdata (abfd
)->cverdefs
= 0;
6571 iverdef
= &iverdefarr
[(iverdefmem
.vd_ndx
& VERSYM_VERSION
) - 1];
6572 memcpy (iverdef
, &iverdefmem
, sizeof (Elf_Internal_Verdef
));
6574 iverdef
->vd_bfd
= abfd
;
6576 if (iverdef
->vd_cnt
== 0)
6577 iverdef
->vd_auxptr
= NULL
;
6580 iverdef
->vd_auxptr
= bfd_alloc2 (abfd
, iverdef
->vd_cnt
,
6581 sizeof (Elf_Internal_Verdaux
));
6582 if (iverdef
->vd_auxptr
== NULL
)
6583 goto error_return_verdef
;
6587 > (size_t) (contents_end_aux
- (bfd_byte
*) everdef
))
6588 goto error_return_verdef
;
6590 everdaux
= ((Elf_External_Verdaux
*)
6591 ((bfd_byte
*) everdef
+ iverdef
->vd_aux
));
6592 iverdaux
= iverdef
->vd_auxptr
;
6593 for (j
= 0; j
< iverdef
->vd_cnt
; j
++, iverdaux
++)
6595 _bfd_elf_swap_verdaux_in (abfd
, everdaux
, iverdaux
);
6597 iverdaux
->vda_nodename
=
6598 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
6599 iverdaux
->vda_name
);
6600 if (iverdaux
->vda_nodename
== NULL
)
6601 goto error_return_verdef
;
6603 if (j
+ 1 < iverdef
->vd_cnt
)
6604 iverdaux
->vda_nextptr
= iverdaux
+ 1;
6606 iverdaux
->vda_nextptr
= NULL
;
6608 if (iverdaux
->vda_next
6609 > (size_t) (contents_end_aux
- (bfd_byte
*) everdaux
))
6610 goto error_return_verdef
;
6612 everdaux
= ((Elf_External_Verdaux
*)
6613 ((bfd_byte
*) everdaux
+ iverdaux
->vda_next
));
6616 if (iverdef
->vd_cnt
)
6617 iverdef
->vd_nodename
= iverdef
->vd_auxptr
->vda_nodename
;
6619 if ((size_t) (iverdef
- iverdefarr
) + 1 < maxidx
)
6620 iverdef
->vd_nextdef
= iverdef
+ 1;
6622 iverdef
->vd_nextdef
= NULL
;
6624 everdef
= ((Elf_External_Verdef
*)
6625 ((bfd_byte
*) everdef
+ iverdef
->vd_next
));
6631 else if (default_imported_symver
)
6638 elf_tdata (abfd
)->verdef
= bfd_zalloc2 (abfd
, freeidx
,
6639 sizeof (Elf_Internal_Verdef
));
6640 if (elf_tdata (abfd
)->verdef
== NULL
)
6643 elf_tdata (abfd
)->cverdefs
= freeidx
;
6646 /* Create a default version based on the soname. */
6647 if (default_imported_symver
)
6649 Elf_Internal_Verdef
*iverdef
;
6650 Elf_Internal_Verdaux
*iverdaux
;
6652 iverdef
= &elf_tdata (abfd
)->verdef
[freeidx
- 1];;
6654 iverdef
->vd_version
= VER_DEF_CURRENT
;
6655 iverdef
->vd_flags
= 0;
6656 iverdef
->vd_ndx
= freeidx
;
6657 iverdef
->vd_cnt
= 1;
6659 iverdef
->vd_bfd
= abfd
;
6661 iverdef
->vd_nodename
= bfd_elf_get_dt_soname (abfd
);
6662 if (iverdef
->vd_nodename
== NULL
)
6663 goto error_return_verdef
;
6664 iverdef
->vd_nextdef
= NULL
;
6665 iverdef
->vd_auxptr
= bfd_alloc (abfd
, sizeof (Elf_Internal_Verdaux
));
6666 if (iverdef
->vd_auxptr
== NULL
)
6667 goto error_return_verdef
;
6669 iverdaux
= iverdef
->vd_auxptr
;
6670 iverdaux
->vda_nodename
= iverdef
->vd_nodename
;
6671 iverdaux
->vda_nextptr
= NULL
;
6677 if (contents
!= NULL
)
6683 _bfd_elf_make_empty_symbol (bfd
*abfd
)
6685 elf_symbol_type
*newsym
;
6686 bfd_size_type amt
= sizeof (elf_symbol_type
);
6688 newsym
= bfd_zalloc (abfd
, amt
);
6693 newsym
->symbol
.the_bfd
= abfd
;
6694 return &newsym
->symbol
;
6699 _bfd_elf_get_symbol_info (bfd
*abfd ATTRIBUTE_UNUSED
,
6703 bfd_symbol_info (symbol
, ret
);
6706 /* Return whether a symbol name implies a local symbol. Most targets
6707 use this function for the is_local_label_name entry point, but some
6711 _bfd_elf_is_local_label_name (bfd
*abfd ATTRIBUTE_UNUSED
,
6714 /* Normal local symbols start with ``.L''. */
6715 if (name
[0] == '.' && name
[1] == 'L')
6718 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
6719 DWARF debugging symbols starting with ``..''. */
6720 if (name
[0] == '.' && name
[1] == '.')
6723 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
6724 emitting DWARF debugging output. I suspect this is actually a
6725 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
6726 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
6727 underscore to be emitted on some ELF targets). For ease of use,
6728 we treat such symbols as local. */
6729 if (name
[0] == '_' && name
[1] == '.' && name
[2] == 'L' && name
[3] == '_')
6736 _bfd_elf_get_lineno (bfd
*abfd ATTRIBUTE_UNUSED
,
6737 asymbol
*symbol ATTRIBUTE_UNUSED
)
6744 _bfd_elf_set_arch_mach (bfd
*abfd
,
6745 enum bfd_architecture arch
,
6746 unsigned long machine
)
6748 /* If this isn't the right architecture for this backend, and this
6749 isn't the generic backend, fail. */
6750 if (arch
!= get_elf_backend_data (abfd
)->arch
6751 && arch
!= bfd_arch_unknown
6752 && get_elf_backend_data (abfd
)->arch
!= bfd_arch_unknown
)
6755 return bfd_default_set_arch_mach (abfd
, arch
, machine
);
6758 /* Find the function to a particular section and offset,
6759 for error reporting. */
6762 elf_find_function (bfd
*abfd ATTRIBUTE_UNUSED
,
6766 const char **filename_ptr
,
6767 const char **functionname_ptr
)
6769 const char *filename
;
6770 asymbol
*func
, *file
;
6773 /* ??? Given multiple file symbols, it is impossible to reliably
6774 choose the right file name for global symbols. File symbols are
6775 local symbols, and thus all file symbols must sort before any
6776 global symbols. The ELF spec may be interpreted to say that a
6777 file symbol must sort before other local symbols, but currently
6778 ld -r doesn't do this. So, for ld -r output, it is possible to
6779 make a better choice of file name for local symbols by ignoring
6780 file symbols appearing after a given local symbol. */
6781 enum { nothing_seen
, symbol_seen
, file_after_symbol_seen
} state
;
6787 state
= nothing_seen
;
6789 for (p
= symbols
; *p
!= NULL
; p
++)
6793 q
= (elf_symbol_type
*) *p
;
6795 switch (ELF_ST_TYPE (q
->internal_elf_sym
.st_info
))
6801 if (state
== symbol_seen
)
6802 state
= file_after_symbol_seen
;
6806 if (bfd_get_section (&q
->symbol
) == section
6807 && q
->symbol
.value
>= low_func
6808 && q
->symbol
.value
<= offset
)
6810 func
= (asymbol
*) q
;
6811 low_func
= q
->symbol
.value
;
6814 && (ELF_ST_BIND (q
->internal_elf_sym
.st_info
) == STB_LOCAL
6815 || state
!= file_after_symbol_seen
))
6816 filename
= bfd_asymbol_name (file
);
6820 if (state
== nothing_seen
)
6821 state
= symbol_seen
;
6828 *filename_ptr
= filename
;
6829 if (functionname_ptr
)
6830 *functionname_ptr
= bfd_asymbol_name (func
);
6835 /* Find the nearest line to a particular section and offset,
6836 for error reporting. */
6839 _bfd_elf_find_nearest_line (bfd
*abfd
,
6843 const char **filename_ptr
,
6844 const char **functionname_ptr
,
6845 unsigned int *line_ptr
)
6849 if (_bfd_dwarf1_find_nearest_line (abfd
, section
, symbols
, offset
,
6850 filename_ptr
, functionname_ptr
,
6853 if (!*functionname_ptr
)
6854 elf_find_function (abfd
, section
, symbols
, offset
,
6855 *filename_ptr
? NULL
: filename_ptr
,
6861 if (_bfd_dwarf2_find_nearest_line (abfd
, section
, symbols
, offset
,
6862 filename_ptr
, functionname_ptr
,
6864 &elf_tdata (abfd
)->dwarf2_find_line_info
))
6866 if (!*functionname_ptr
)
6867 elf_find_function (abfd
, section
, symbols
, offset
,
6868 *filename_ptr
? NULL
: filename_ptr
,
6874 if (! _bfd_stab_section_find_nearest_line (abfd
, symbols
, section
, offset
,
6875 &found
, filename_ptr
,
6876 functionname_ptr
, line_ptr
,
6877 &elf_tdata (abfd
)->line_info
))
6879 if (found
&& (*functionname_ptr
|| *line_ptr
))
6882 if (symbols
== NULL
)
6885 if (! elf_find_function (abfd
, section
, symbols
, offset
,
6886 filename_ptr
, functionname_ptr
))
6893 /* Find the line for a symbol. */
6896 _bfd_elf_find_line (bfd
*abfd
, asymbol
**symbols
, asymbol
*symbol
,
6897 const char **filename_ptr
, unsigned int *line_ptr
)
6899 return _bfd_dwarf2_find_line (abfd
, symbols
, symbol
,
6900 filename_ptr
, line_ptr
, 0,
6901 &elf_tdata (abfd
)->dwarf2_find_line_info
);
6904 /* After a call to bfd_find_nearest_line, successive calls to
6905 bfd_find_inliner_info can be used to get source information about
6906 each level of function inlining that terminated at the address
6907 passed to bfd_find_nearest_line. Currently this is only supported
6908 for DWARF2 with appropriate DWARF3 extensions. */
6911 _bfd_elf_find_inliner_info (bfd
*abfd
,
6912 const char **filename_ptr
,
6913 const char **functionname_ptr
,
6914 unsigned int *line_ptr
)
6917 found
= _bfd_dwarf2_find_inliner_info (abfd
, filename_ptr
,
6918 functionname_ptr
, line_ptr
,
6919 & elf_tdata (abfd
)->dwarf2_find_line_info
);
6924 _bfd_elf_sizeof_headers (bfd
*abfd
, struct bfd_link_info
*info
)
6926 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
6927 int ret
= bed
->s
->sizeof_ehdr
;
6929 if (!info
->relocatable
)
6931 bfd_size_type phdr_size
= elf_tdata (abfd
)->program_header_size
;
6933 if (phdr_size
== (bfd_size_type
) -1)
6935 struct elf_segment_map
*m
;
6938 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
6939 phdr_size
+= bed
->s
->sizeof_phdr
;
6942 phdr_size
= get_program_header_size (abfd
, info
);
6945 elf_tdata (abfd
)->program_header_size
= phdr_size
;
6953 _bfd_elf_set_section_contents (bfd
*abfd
,
6955 const void *location
,
6957 bfd_size_type count
)
6959 Elf_Internal_Shdr
*hdr
;
6962 if (! abfd
->output_has_begun
6963 && ! _bfd_elf_compute_section_file_positions (abfd
, NULL
))
6966 hdr
= &elf_section_data (section
)->this_hdr
;
6967 pos
= hdr
->sh_offset
+ offset
;
6968 if (bfd_seek (abfd
, pos
, SEEK_SET
) != 0
6969 || bfd_bwrite (location
, count
, abfd
) != count
)
6976 _bfd_elf_no_info_to_howto (bfd
*abfd ATTRIBUTE_UNUSED
,
6977 arelent
*cache_ptr ATTRIBUTE_UNUSED
,
6978 Elf_Internal_Rela
*dst ATTRIBUTE_UNUSED
)
6983 /* Try to convert a non-ELF reloc into an ELF one. */
6986 _bfd_elf_validate_reloc (bfd
*abfd
, arelent
*areloc
)
6988 /* Check whether we really have an ELF howto. */
6990 if ((*areloc
->sym_ptr_ptr
)->the_bfd
->xvec
!= abfd
->xvec
)
6992 bfd_reloc_code_real_type code
;
6993 reloc_howto_type
*howto
;
6995 /* Alien reloc: Try to determine its type to replace it with an
6996 equivalent ELF reloc. */
6998 if (areloc
->howto
->pc_relative
)
7000 switch (areloc
->howto
->bitsize
)
7003 code
= BFD_RELOC_8_PCREL
;
7006 code
= BFD_RELOC_12_PCREL
;
7009 code
= BFD_RELOC_16_PCREL
;
7012 code
= BFD_RELOC_24_PCREL
;
7015 code
= BFD_RELOC_32_PCREL
;
7018 code
= BFD_RELOC_64_PCREL
;
7024 howto
= bfd_reloc_type_lookup (abfd
, code
);
7026 if (areloc
->howto
->pcrel_offset
!= howto
->pcrel_offset
)
7028 if (howto
->pcrel_offset
)
7029 areloc
->addend
+= areloc
->address
;
7031 areloc
->addend
-= areloc
->address
; /* addend is unsigned!! */
7036 switch (areloc
->howto
->bitsize
)
7042 code
= BFD_RELOC_14
;
7045 code
= BFD_RELOC_16
;
7048 code
= BFD_RELOC_26
;
7051 code
= BFD_RELOC_32
;
7054 code
= BFD_RELOC_64
;
7060 howto
= bfd_reloc_type_lookup (abfd
, code
);
7064 areloc
->howto
= howto
;
7072 (*_bfd_error_handler
)
7073 (_("%B: unsupported relocation type %s"),
7074 abfd
, areloc
->howto
->name
);
7075 bfd_set_error (bfd_error_bad_value
);
7080 _bfd_elf_close_and_cleanup (bfd
*abfd
)
7082 if (bfd_get_format (abfd
) == bfd_object
)
7084 if (elf_tdata (abfd
) != NULL
&& elf_shstrtab (abfd
) != NULL
)
7085 _bfd_elf_strtab_free (elf_shstrtab (abfd
));
7086 _bfd_dwarf2_cleanup_debug_info (abfd
);
7089 return _bfd_generic_close_and_cleanup (abfd
);
7092 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
7093 in the relocation's offset. Thus we cannot allow any sort of sanity
7094 range-checking to interfere. There is nothing else to do in processing
7097 bfd_reloc_status_type
7098 _bfd_elf_rel_vtable_reloc_fn
7099 (bfd
*abfd ATTRIBUTE_UNUSED
, arelent
*re ATTRIBUTE_UNUSED
,
7100 struct bfd_symbol
*symbol ATTRIBUTE_UNUSED
,
7101 void *data ATTRIBUTE_UNUSED
, asection
*is ATTRIBUTE_UNUSED
,
7102 bfd
*obfd ATTRIBUTE_UNUSED
, char **errmsg ATTRIBUTE_UNUSED
)
7104 return bfd_reloc_ok
;
7107 /* Elf core file support. Much of this only works on native
7108 toolchains, since we rely on knowing the
7109 machine-dependent procfs structure in order to pick
7110 out details about the corefile. */
7112 #ifdef HAVE_SYS_PROCFS_H
7113 # include <sys/procfs.h>
7116 /* FIXME: this is kinda wrong, but it's what gdb wants. */
7119 elfcore_make_pid (bfd
*abfd
)
7121 return ((elf_tdata (abfd
)->core_lwpid
<< 16)
7122 + (elf_tdata (abfd
)->core_pid
));
7125 /* If there isn't a section called NAME, make one, using
7126 data from SECT. Note, this function will generate a
7127 reference to NAME, so you shouldn't deallocate or
7131 elfcore_maybe_make_sect (bfd
*abfd
, char *name
, asection
*sect
)
7135 if (bfd_get_section_by_name (abfd
, name
) != NULL
)
7138 sect2
= bfd_make_section_with_flags (abfd
, name
, sect
->flags
);
7142 sect2
->size
= sect
->size
;
7143 sect2
->filepos
= sect
->filepos
;
7144 sect2
->alignment_power
= sect
->alignment_power
;
7148 /* Create a pseudosection containing SIZE bytes at FILEPOS. This
7149 actually creates up to two pseudosections:
7150 - For the single-threaded case, a section named NAME, unless
7151 such a section already exists.
7152 - For the multi-threaded case, a section named "NAME/PID", where
7153 PID is elfcore_make_pid (abfd).
7154 Both pseudosections have identical contents. */
7156 _bfd_elfcore_make_pseudosection (bfd
*abfd
,
7162 char *threaded_name
;
7166 /* Build the section name. */
7168 sprintf (buf
, "%s/%d", name
, elfcore_make_pid (abfd
));
7169 len
= strlen (buf
) + 1;
7170 threaded_name
= bfd_alloc (abfd
, len
);
7171 if (threaded_name
== NULL
)
7173 memcpy (threaded_name
, buf
, len
);
7175 sect
= bfd_make_section_anyway_with_flags (abfd
, threaded_name
,
7180 sect
->filepos
= filepos
;
7181 sect
->alignment_power
= 2;
7183 return elfcore_maybe_make_sect (abfd
, name
, sect
);
7186 /* prstatus_t exists on:
7188 linux 2.[01] + glibc
7192 #if defined (HAVE_PRSTATUS_T)
7195 elfcore_grok_prstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
7200 if (note
->descsz
== sizeof (prstatus_t
))
7204 size
= sizeof (prstat
.pr_reg
);
7205 offset
= offsetof (prstatus_t
, pr_reg
);
7206 memcpy (&prstat
, note
->descdata
, sizeof (prstat
));
7208 /* Do not overwrite the core signal if it
7209 has already been set by another thread. */
7210 if (elf_tdata (abfd
)->core_signal
== 0)
7211 elf_tdata (abfd
)->core_signal
= prstat
.pr_cursig
;
7212 elf_tdata (abfd
)->core_pid
= prstat
.pr_pid
;
7214 /* pr_who exists on:
7217 pr_who doesn't exist on:
7220 #if defined (HAVE_PRSTATUS_T_PR_WHO)
7221 elf_tdata (abfd
)->core_lwpid
= prstat
.pr_who
;
7224 #if defined (HAVE_PRSTATUS32_T)
7225 else if (note
->descsz
== sizeof (prstatus32_t
))
7227 /* 64-bit host, 32-bit corefile */
7228 prstatus32_t prstat
;
7230 size
= sizeof (prstat
.pr_reg
);
7231 offset
= offsetof (prstatus32_t
, pr_reg
);
7232 memcpy (&prstat
, note
->descdata
, sizeof (prstat
));
7234 /* Do not overwrite the core signal if it
7235 has already been set by another thread. */
7236 if (elf_tdata (abfd
)->core_signal
== 0)
7237 elf_tdata (abfd
)->core_signal
= prstat
.pr_cursig
;
7238 elf_tdata (abfd
)->core_pid
= prstat
.pr_pid
;
7240 /* pr_who exists on:
7243 pr_who doesn't exist on:
7246 #if defined (HAVE_PRSTATUS32_T_PR_WHO)
7247 elf_tdata (abfd
)->core_lwpid
= prstat
.pr_who
;
7250 #endif /* HAVE_PRSTATUS32_T */
7253 /* Fail - we don't know how to handle any other
7254 note size (ie. data object type). */
7258 /* Make a ".reg/999" section and a ".reg" section. */
7259 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
7260 size
, note
->descpos
+ offset
);
7262 #endif /* defined (HAVE_PRSTATUS_T) */
7264 /* Create a pseudosection containing the exact contents of NOTE. */
7266 elfcore_make_note_pseudosection (bfd
*abfd
,
7268 Elf_Internal_Note
*note
)
7270 return _bfd_elfcore_make_pseudosection (abfd
, name
,
7271 note
->descsz
, note
->descpos
);
7274 /* There isn't a consistent prfpregset_t across platforms,
7275 but it doesn't matter, because we don't have to pick this
7276 data structure apart. */
7279 elfcore_grok_prfpreg (bfd
*abfd
, Elf_Internal_Note
*note
)
7281 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
7284 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
7285 type of 5 (NT_PRXFPREG). Just include the whole note's contents
7289 elfcore_grok_prxfpreg (bfd
*abfd
, Elf_Internal_Note
*note
)
7291 return elfcore_make_note_pseudosection (abfd
, ".reg-xfp", note
);
7294 #if defined (HAVE_PRPSINFO_T)
7295 typedef prpsinfo_t elfcore_psinfo_t
;
7296 #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
7297 typedef prpsinfo32_t elfcore_psinfo32_t
;
7301 #if defined (HAVE_PSINFO_T)
7302 typedef psinfo_t elfcore_psinfo_t
;
7303 #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
7304 typedef psinfo32_t elfcore_psinfo32_t
;
7308 /* return a malloc'ed copy of a string at START which is at
7309 most MAX bytes long, possibly without a terminating '\0'.
7310 the copy will always have a terminating '\0'. */
7313 _bfd_elfcore_strndup (bfd
*abfd
, char *start
, size_t max
)
7316 char *end
= memchr (start
, '\0', max
);
7324 dups
= bfd_alloc (abfd
, len
+ 1);
7328 memcpy (dups
, start
, len
);
7334 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7336 elfcore_grok_psinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
7338 if (note
->descsz
== sizeof (elfcore_psinfo_t
))
7340 elfcore_psinfo_t psinfo
;
7342 memcpy (&psinfo
, note
->descdata
, sizeof (psinfo
));
7344 elf_tdata (abfd
)->core_program
7345 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_fname
,
7346 sizeof (psinfo
.pr_fname
));
7348 elf_tdata (abfd
)->core_command
7349 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_psargs
,
7350 sizeof (psinfo
.pr_psargs
));
7352 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
7353 else if (note
->descsz
== sizeof (elfcore_psinfo32_t
))
7355 /* 64-bit host, 32-bit corefile */
7356 elfcore_psinfo32_t psinfo
;
7358 memcpy (&psinfo
, note
->descdata
, sizeof (psinfo
));
7360 elf_tdata (abfd
)->core_program
7361 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_fname
,
7362 sizeof (psinfo
.pr_fname
));
7364 elf_tdata (abfd
)->core_command
7365 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_psargs
,
7366 sizeof (psinfo
.pr_psargs
));
7372 /* Fail - we don't know how to handle any other
7373 note size (ie. data object type). */
7377 /* Note that for some reason, a spurious space is tacked
7378 onto the end of the args in some (at least one anyway)
7379 implementations, so strip it off if it exists. */
7382 char *command
= elf_tdata (abfd
)->core_command
;
7383 int n
= strlen (command
);
7385 if (0 < n
&& command
[n
- 1] == ' ')
7386 command
[n
- 1] = '\0';
7391 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
7393 #if defined (HAVE_PSTATUS_T)
7395 elfcore_grok_pstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
7397 if (note
->descsz
== sizeof (pstatus_t
)
7398 #if defined (HAVE_PXSTATUS_T)
7399 || note
->descsz
== sizeof (pxstatus_t
)
7405 memcpy (&pstat
, note
->descdata
, sizeof (pstat
));
7407 elf_tdata (abfd
)->core_pid
= pstat
.pr_pid
;
7409 #if defined (HAVE_PSTATUS32_T)
7410 else if (note
->descsz
== sizeof (pstatus32_t
))
7412 /* 64-bit host, 32-bit corefile */
7415 memcpy (&pstat
, note
->descdata
, sizeof (pstat
));
7417 elf_tdata (abfd
)->core_pid
= pstat
.pr_pid
;
7420 /* Could grab some more details from the "representative"
7421 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
7422 NT_LWPSTATUS note, presumably. */
7426 #endif /* defined (HAVE_PSTATUS_T) */
7428 #if defined (HAVE_LWPSTATUS_T)
7430 elfcore_grok_lwpstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
7432 lwpstatus_t lwpstat
;
7438 if (note
->descsz
!= sizeof (lwpstat
)
7439 #if defined (HAVE_LWPXSTATUS_T)
7440 && note
->descsz
!= sizeof (lwpxstatus_t
)
7445 memcpy (&lwpstat
, note
->descdata
, sizeof (lwpstat
));
7447 elf_tdata (abfd
)->core_lwpid
= lwpstat
.pr_lwpid
;
7448 elf_tdata (abfd
)->core_signal
= lwpstat
.pr_cursig
;
7450 /* Make a ".reg/999" section. */
7452 sprintf (buf
, ".reg/%d", elfcore_make_pid (abfd
));
7453 len
= strlen (buf
) + 1;
7454 name
= bfd_alloc (abfd
, len
);
7457 memcpy (name
, buf
, len
);
7459 sect
= bfd_make_section_anyway_with_flags (abfd
, name
, SEC_HAS_CONTENTS
);
7463 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7464 sect
->size
= sizeof (lwpstat
.pr_context
.uc_mcontext
.gregs
);
7465 sect
->filepos
= note
->descpos
7466 + offsetof (lwpstatus_t
, pr_context
.uc_mcontext
.gregs
);
7469 #if defined (HAVE_LWPSTATUS_T_PR_REG)
7470 sect
->size
= sizeof (lwpstat
.pr_reg
);
7471 sect
->filepos
= note
->descpos
+ offsetof (lwpstatus_t
, pr_reg
);
7474 sect
->alignment_power
= 2;
7476 if (!elfcore_maybe_make_sect (abfd
, ".reg", sect
))
7479 /* Make a ".reg2/999" section */
7481 sprintf (buf
, ".reg2/%d", elfcore_make_pid (abfd
));
7482 len
= strlen (buf
) + 1;
7483 name
= bfd_alloc (abfd
, len
);
7486 memcpy (name
, buf
, len
);
7488 sect
= bfd_make_section_anyway_with_flags (abfd
, name
, SEC_HAS_CONTENTS
);
7492 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7493 sect
->size
= sizeof (lwpstat
.pr_context
.uc_mcontext
.fpregs
);
7494 sect
->filepos
= note
->descpos
7495 + offsetof (lwpstatus_t
, pr_context
.uc_mcontext
.fpregs
);
7498 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
7499 sect
->size
= sizeof (lwpstat
.pr_fpreg
);
7500 sect
->filepos
= note
->descpos
+ offsetof (lwpstatus_t
, pr_fpreg
);
7503 sect
->alignment_power
= 2;
7505 return elfcore_maybe_make_sect (abfd
, ".reg2", sect
);
7507 #endif /* defined (HAVE_LWPSTATUS_T) */
7509 #if defined (HAVE_WIN32_PSTATUS_T)
7511 elfcore_grok_win32pstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
7517 win32_pstatus_t pstatus
;
7519 if (note
->descsz
< sizeof (pstatus
))
7522 memcpy (&pstatus
, note
->descdata
, sizeof (pstatus
));
7524 switch (pstatus
.data_type
)
7526 case NOTE_INFO_PROCESS
:
7527 /* FIXME: need to add ->core_command. */
7528 elf_tdata (abfd
)->core_signal
= pstatus
.data
.process_info
.signal
;
7529 elf_tdata (abfd
)->core_pid
= pstatus
.data
.process_info
.pid
;
7532 case NOTE_INFO_THREAD
:
7533 /* Make a ".reg/999" section. */
7534 sprintf (buf
, ".reg/%ld", (long) pstatus
.data
.thread_info
.tid
);
7536 len
= strlen (buf
) + 1;
7537 name
= bfd_alloc (abfd
, len
);
7541 memcpy (name
, buf
, len
);
7543 sect
= bfd_make_section_anyway_with_flags (abfd
, name
, SEC_HAS_CONTENTS
);
7547 sect
->size
= sizeof (pstatus
.data
.thread_info
.thread_context
);
7548 sect
->filepos
= (note
->descpos
7549 + offsetof (struct win32_pstatus
,
7550 data
.thread_info
.thread_context
));
7551 sect
->alignment_power
= 2;
7553 if (pstatus
.data
.thread_info
.is_active_thread
)
7554 if (! elfcore_maybe_make_sect (abfd
, ".reg", sect
))
7558 case NOTE_INFO_MODULE
:
7559 /* Make a ".module/xxxxxxxx" section. */
7560 sprintf (buf
, ".module/%08lx",
7561 (long) pstatus
.data
.module_info
.base_address
);
7563 len
= strlen (buf
) + 1;
7564 name
= bfd_alloc (abfd
, len
);
7568 memcpy (name
, buf
, len
);
7570 sect
= bfd_make_section_anyway_with_flags (abfd
, name
, SEC_HAS_CONTENTS
);
7575 sect
->size
= note
->descsz
;
7576 sect
->filepos
= note
->descpos
;
7577 sect
->alignment_power
= 2;
7586 #endif /* HAVE_WIN32_PSTATUS_T */
7589 elfcore_grok_note (bfd
*abfd
, Elf_Internal_Note
*note
)
7591 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
7599 if (bed
->elf_backend_grok_prstatus
)
7600 if ((*bed
->elf_backend_grok_prstatus
) (abfd
, note
))
7602 #if defined (HAVE_PRSTATUS_T)
7603 return elfcore_grok_prstatus (abfd
, note
);
7608 #if defined (HAVE_PSTATUS_T)
7610 return elfcore_grok_pstatus (abfd
, note
);
7613 #if defined (HAVE_LWPSTATUS_T)
7615 return elfcore_grok_lwpstatus (abfd
, note
);
7618 case NT_FPREGSET
: /* FIXME: rename to NT_PRFPREG */
7619 return elfcore_grok_prfpreg (abfd
, note
);
7621 #if defined (HAVE_WIN32_PSTATUS_T)
7622 case NT_WIN32PSTATUS
:
7623 return elfcore_grok_win32pstatus (abfd
, note
);
7626 case NT_PRXFPREG
: /* Linux SSE extension */
7627 if (note
->namesz
== 6
7628 && strcmp (note
->namedata
, "LINUX") == 0)
7629 return elfcore_grok_prxfpreg (abfd
, note
);
7635 if (bed
->elf_backend_grok_psinfo
)
7636 if ((*bed
->elf_backend_grok_psinfo
) (abfd
, note
))
7638 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7639 return elfcore_grok_psinfo (abfd
, note
);
7646 asection
*sect
= bfd_make_section_anyway_with_flags (abfd
, ".auxv",
7651 sect
->size
= note
->descsz
;
7652 sect
->filepos
= note
->descpos
;
7653 sect
->alignment_power
= 1 + bfd_get_arch_size (abfd
) / 32;
7661 elfcore_netbsd_get_lwpid (Elf_Internal_Note
*note
, int *lwpidp
)
7665 cp
= strchr (note
->namedata
, '@');
7668 *lwpidp
= atoi(cp
+ 1);
7675 elfcore_grok_netbsd_procinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
7677 /* Signal number at offset 0x08. */
7678 elf_tdata (abfd
)->core_signal
7679 = bfd_h_get_32 (abfd
, (bfd_byte
*) note
->descdata
+ 0x08);
7681 /* Process ID at offset 0x50. */
7682 elf_tdata (abfd
)->core_pid
7683 = bfd_h_get_32 (abfd
, (bfd_byte
*) note
->descdata
+ 0x50);
7685 /* Command name at 0x7c (max 32 bytes, including nul). */
7686 elf_tdata (abfd
)->core_command
7687 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 0x7c, 31);
7689 return elfcore_make_note_pseudosection (abfd
, ".note.netbsdcore.procinfo",
7694 elfcore_grok_netbsd_note (bfd
*abfd
, Elf_Internal_Note
*note
)
7698 if (elfcore_netbsd_get_lwpid (note
, &lwp
))
7699 elf_tdata (abfd
)->core_lwpid
= lwp
;
7701 if (note
->type
== NT_NETBSDCORE_PROCINFO
)
7703 /* NetBSD-specific core "procinfo". Note that we expect to
7704 find this note before any of the others, which is fine,
7705 since the kernel writes this note out first when it
7706 creates a core file. */
7708 return elfcore_grok_netbsd_procinfo (abfd
, note
);
7711 /* As of Jan 2002 there are no other machine-independent notes
7712 defined for NetBSD core files. If the note type is less
7713 than the start of the machine-dependent note types, we don't
7716 if (note
->type
< NT_NETBSDCORE_FIRSTMACH
)
7720 switch (bfd_get_arch (abfd
))
7722 /* On the Alpha, SPARC (32-bit and 64-bit), PT_GETREGS == mach+0 and
7723 PT_GETFPREGS == mach+2. */
7725 case bfd_arch_alpha
:
7726 case bfd_arch_sparc
:
7729 case NT_NETBSDCORE_FIRSTMACH
+0:
7730 return elfcore_make_note_pseudosection (abfd
, ".reg", note
);
7732 case NT_NETBSDCORE_FIRSTMACH
+2:
7733 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
7739 /* On all other arch's, PT_GETREGS == mach+1 and
7740 PT_GETFPREGS == mach+3. */
7745 case NT_NETBSDCORE_FIRSTMACH
+1:
7746 return elfcore_make_note_pseudosection (abfd
, ".reg", note
);
7748 case NT_NETBSDCORE_FIRSTMACH
+3:
7749 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
7759 elfcore_grok_nto_status (bfd
*abfd
, Elf_Internal_Note
*note
, long *tid
)
7761 void *ddata
= note
->descdata
;
7768 /* nto_procfs_status 'pid' field is at offset 0. */
7769 elf_tdata (abfd
)->core_pid
= bfd_get_32 (abfd
, (bfd_byte
*) ddata
);
7771 /* nto_procfs_status 'tid' field is at offset 4. Pass it back. */
7772 *tid
= bfd_get_32 (abfd
, (bfd_byte
*) ddata
+ 4);
7774 /* nto_procfs_status 'flags' field is at offset 8. */
7775 flags
= bfd_get_32 (abfd
, (bfd_byte
*) ddata
+ 8);
7777 /* nto_procfs_status 'what' field is at offset 14. */
7778 if ((sig
= bfd_get_16 (abfd
, (bfd_byte
*) ddata
+ 14)) > 0)
7780 elf_tdata (abfd
)->core_signal
= sig
;
7781 elf_tdata (abfd
)->core_lwpid
= *tid
;
7784 /* _DEBUG_FLAG_CURTID (current thread) is 0x80. Some cores
7785 do not come from signals so we make sure we set the current
7786 thread just in case. */
7787 if (flags
& 0x00000080)
7788 elf_tdata (abfd
)->core_lwpid
= *tid
;
7790 /* Make a ".qnx_core_status/%d" section. */
7791 sprintf (buf
, ".qnx_core_status/%ld", *tid
);
7793 name
= bfd_alloc (abfd
, strlen (buf
) + 1);
7798 sect
= bfd_make_section_anyway_with_flags (abfd
, name
, SEC_HAS_CONTENTS
);
7802 sect
->size
= note
->descsz
;
7803 sect
->filepos
= note
->descpos
;
7804 sect
->alignment_power
= 2;
7806 return (elfcore_maybe_make_sect (abfd
, ".qnx_core_status", sect
));
7810 elfcore_grok_nto_regs (bfd
*abfd
,
7811 Elf_Internal_Note
*note
,
7819 /* Make a "(base)/%d" section. */
7820 sprintf (buf
, "%s/%ld", base
, tid
);
7822 name
= bfd_alloc (abfd
, strlen (buf
) + 1);
7827 sect
= bfd_make_section_anyway_with_flags (abfd
, name
, SEC_HAS_CONTENTS
);
7831 sect
->size
= note
->descsz
;
7832 sect
->filepos
= note
->descpos
;
7833 sect
->alignment_power
= 2;
7835 /* This is the current thread. */
7836 if (elf_tdata (abfd
)->core_lwpid
== tid
)
7837 return elfcore_maybe_make_sect (abfd
, base
, sect
);
7842 #define BFD_QNT_CORE_INFO 7
7843 #define BFD_QNT_CORE_STATUS 8
7844 #define BFD_QNT_CORE_GREG 9
7845 #define BFD_QNT_CORE_FPREG 10
7848 elfcore_grok_nto_note (bfd
*abfd
, Elf_Internal_Note
*note
)
7850 /* Every GREG section has a STATUS section before it. Store the
7851 tid from the previous call to pass down to the next gregs
7853 static long tid
= 1;
7857 case BFD_QNT_CORE_INFO
:
7858 return elfcore_make_note_pseudosection (abfd
, ".qnx_core_info", note
);
7859 case BFD_QNT_CORE_STATUS
:
7860 return elfcore_grok_nto_status (abfd
, note
, &tid
);
7861 case BFD_QNT_CORE_GREG
:
7862 return elfcore_grok_nto_regs (abfd
, note
, tid
, ".reg");
7863 case BFD_QNT_CORE_FPREG
:
7864 return elfcore_grok_nto_regs (abfd
, note
, tid
, ".reg2");
7870 /* Function: elfcore_write_note
7873 buffer to hold note, and current size of buffer
7877 size of data for note
7879 Writes note to end of buffer. ELF64 notes are written exactly as
7880 for ELF32, despite the current (as of 2006) ELF gabi specifying
7881 that they ought to have 8-byte namesz and descsz field, and have
7882 8-byte alignment. Other writers, eg. Linux kernel, do the same.
7885 Pointer to realloc'd buffer, *BUFSIZ updated. */
7888 elfcore_write_note (bfd
*abfd
,
7896 Elf_External_Note
*xnp
;
7903 namesz
= strlen (name
) + 1;
7905 newspace
= 12 + ((namesz
+ 3) & -4) + ((size
+ 3) & -4);
7907 buf
= realloc (buf
, *bufsiz
+ newspace
);
7908 dest
= buf
+ *bufsiz
;
7909 *bufsiz
+= newspace
;
7910 xnp
= (Elf_External_Note
*) dest
;
7911 H_PUT_32 (abfd
, namesz
, xnp
->namesz
);
7912 H_PUT_32 (abfd
, size
, xnp
->descsz
);
7913 H_PUT_32 (abfd
, type
, xnp
->type
);
7917 memcpy (dest
, name
, namesz
);
7925 memcpy (dest
, input
, size
);
7935 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7937 elfcore_write_prpsinfo (bfd
*abfd
,
7943 const char *note_name
= "CORE";
7944 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
7946 if (bed
->elf_backend_write_core_note
!= NULL
)
7949 ret
= (*bed
->elf_backend_write_core_note
) (abfd
, buf
, bufsiz
,
7950 NT_PRPSINFO
, fname
, psargs
);
7955 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
7956 if (bed
->s
->elfclass
== ELFCLASS32
)
7958 #if defined (HAVE_PSINFO32_T)
7960 int note_type
= NT_PSINFO
;
7963 int note_type
= NT_PRPSINFO
;
7966 memset (&data
, 0, sizeof (data
));
7967 strncpy (data
.pr_fname
, fname
, sizeof (data
.pr_fname
));
7968 strncpy (data
.pr_psargs
, psargs
, sizeof (data
.pr_psargs
));
7969 return elfcore_write_note (abfd
, buf
, bufsiz
,
7970 note_name
, note_type
, &data
, sizeof (data
));
7975 #if defined (HAVE_PSINFO_T)
7977 int note_type
= NT_PSINFO
;
7980 int note_type
= NT_PRPSINFO
;
7983 memset (&data
, 0, sizeof (data
));
7984 strncpy (data
.pr_fname
, fname
, sizeof (data
.pr_fname
));
7985 strncpy (data
.pr_psargs
, psargs
, sizeof (data
.pr_psargs
));
7986 return elfcore_write_note (abfd
, buf
, bufsiz
,
7987 note_name
, note_type
, &data
, sizeof (data
));
7990 #endif /* PSINFO_T or PRPSINFO_T */
7992 #if defined (HAVE_PRSTATUS_T)
7994 elfcore_write_prstatus (bfd
*abfd
,
8001 const char *note_name
= "CORE";
8002 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
8004 if (bed
->elf_backend_write_core_note
!= NULL
)
8007 ret
= (*bed
->elf_backend_write_core_note
) (abfd
, buf
, bufsiz
,
8009 pid
, cursig
, gregs
);
8014 #if defined (HAVE_PRSTATUS32_T)
8015 if (bed
->s
->elfclass
== ELFCLASS32
)
8017 prstatus32_t prstat
;
8019 memset (&prstat
, 0, sizeof (prstat
));
8020 prstat
.pr_pid
= pid
;
8021 prstat
.pr_cursig
= cursig
;
8022 memcpy (&prstat
.pr_reg
, gregs
, sizeof (prstat
.pr_reg
));
8023 return elfcore_write_note (abfd
, buf
, bufsiz
, note_name
,
8024 NT_PRSTATUS
, &prstat
, sizeof (prstat
));
8031 memset (&prstat
, 0, sizeof (prstat
));
8032 prstat
.pr_pid
= pid
;
8033 prstat
.pr_cursig
= cursig
;
8034 memcpy (&prstat
.pr_reg
, gregs
, sizeof (prstat
.pr_reg
));
8035 return elfcore_write_note (abfd
, buf
, bufsiz
, note_name
,
8036 NT_PRSTATUS
, &prstat
, sizeof (prstat
));
8039 #endif /* HAVE_PRSTATUS_T */
8041 #if defined (HAVE_LWPSTATUS_T)
8043 elfcore_write_lwpstatus (bfd
*abfd
,
8050 lwpstatus_t lwpstat
;
8051 const char *note_name
= "CORE";
8053 memset (&lwpstat
, 0, sizeof (lwpstat
));
8054 lwpstat
.pr_lwpid
= pid
>> 16;
8055 lwpstat
.pr_cursig
= cursig
;
8056 #if defined (HAVE_LWPSTATUS_T_PR_REG)
8057 memcpy (lwpstat
.pr_reg
, gregs
, sizeof (lwpstat
.pr_reg
));
8058 #elif defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
8060 memcpy (lwpstat
.pr_context
.uc_mcontext
.gregs
,
8061 gregs
, sizeof (lwpstat
.pr_context
.uc_mcontext
.gregs
));
8063 memcpy (lwpstat
.pr_context
.uc_mcontext
.__gregs
,
8064 gregs
, sizeof (lwpstat
.pr_context
.uc_mcontext
.__gregs
));
8067 return elfcore_write_note (abfd
, buf
, bufsiz
, note_name
,
8068 NT_LWPSTATUS
, &lwpstat
, sizeof (lwpstat
));
8070 #endif /* HAVE_LWPSTATUS_T */
8072 #if defined (HAVE_PSTATUS_T)
8074 elfcore_write_pstatus (bfd
*abfd
,
8078 int cursig ATTRIBUTE_UNUSED
,
8079 const void *gregs ATTRIBUTE_UNUSED
)
8081 const char *note_name
= "CORE";
8082 #if defined (HAVE_PSTATUS32_T)
8083 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
8085 if (bed
->s
->elfclass
== ELFCLASS32
)
8089 memset (&pstat
, 0, sizeof (pstat
));
8090 pstat
.pr_pid
= pid
& 0xffff;
8091 buf
= elfcore_write_note (abfd
, buf
, bufsiz
, note_name
,
8092 NT_PSTATUS
, &pstat
, sizeof (pstat
));
8100 memset (&pstat
, 0, sizeof (pstat
));
8101 pstat
.pr_pid
= pid
& 0xffff;
8102 buf
= elfcore_write_note (abfd
, buf
, bufsiz
, note_name
,
8103 NT_PSTATUS
, &pstat
, sizeof (pstat
));
8107 #endif /* HAVE_PSTATUS_T */
8110 elfcore_write_prfpreg (bfd
*abfd
,
8116 const char *note_name
= "CORE";
8117 return elfcore_write_note (abfd
, buf
, bufsiz
,
8118 note_name
, NT_FPREGSET
, fpregs
, size
);
8122 elfcore_write_prxfpreg (bfd
*abfd
,
8125 const void *xfpregs
,
8128 char *note_name
= "LINUX";
8129 return elfcore_write_note (abfd
, buf
, bufsiz
,
8130 note_name
, NT_PRXFPREG
, xfpregs
, size
);
8134 elfcore_read_notes (bfd
*abfd
, file_ptr offset
, bfd_size_type size
)
8142 if (bfd_seek (abfd
, offset
, SEEK_SET
) != 0)
8145 buf
= bfd_malloc (size
);
8149 if (bfd_bread (buf
, size
, abfd
) != size
)
8157 while (p
< buf
+ size
)
8159 /* FIXME: bad alignment assumption. */
8160 Elf_External_Note
*xnp
= (Elf_External_Note
*) p
;
8161 Elf_Internal_Note in
;
8163 in
.type
= H_GET_32 (abfd
, xnp
->type
);
8165 in
.namesz
= H_GET_32 (abfd
, xnp
->namesz
);
8166 in
.namedata
= xnp
->name
;
8168 in
.descsz
= H_GET_32 (abfd
, xnp
->descsz
);
8169 in
.descdata
= in
.namedata
+ BFD_ALIGN (in
.namesz
, 4);
8170 in
.descpos
= offset
+ (in
.descdata
- buf
);
8172 if (CONST_STRNEQ (in
.namedata
, "NetBSD-CORE"))
8174 if (! elfcore_grok_netbsd_note (abfd
, &in
))
8177 else if (CONST_STRNEQ (in
.namedata
, "QNX"))
8179 if (! elfcore_grok_nto_note (abfd
, &in
))
8184 if (! elfcore_grok_note (abfd
, &in
))
8188 p
= in
.descdata
+ BFD_ALIGN (in
.descsz
, 4);
8195 /* Providing external access to the ELF program header table. */
8197 /* Return an upper bound on the number of bytes required to store a
8198 copy of ABFD's program header table entries. Return -1 if an error
8199 occurs; bfd_get_error will return an appropriate code. */
8202 bfd_get_elf_phdr_upper_bound (bfd
*abfd
)
8204 if (abfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
8206 bfd_set_error (bfd_error_wrong_format
);
8210 return elf_elfheader (abfd
)->e_phnum
* sizeof (Elf_Internal_Phdr
);
8213 /* Copy ABFD's program header table entries to *PHDRS. The entries
8214 will be stored as an array of Elf_Internal_Phdr structures, as
8215 defined in include/elf/internal.h. To find out how large the
8216 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
8218 Return the number of program header table entries read, or -1 if an
8219 error occurs; bfd_get_error will return an appropriate code. */
8222 bfd_get_elf_phdrs (bfd
*abfd
, void *phdrs
)
8226 if (abfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
8228 bfd_set_error (bfd_error_wrong_format
);
8232 num_phdrs
= elf_elfheader (abfd
)->e_phnum
;
8233 memcpy (phdrs
, elf_tdata (abfd
)->phdr
,
8234 num_phdrs
* sizeof (Elf_Internal_Phdr
));
8240 _bfd_elf_sprintf_vma (bfd
*abfd ATTRIBUTE_UNUSED
, char *buf
, bfd_vma value
)
8243 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
8245 i_ehdrp
= elf_elfheader (abfd
);
8246 if (i_ehdrp
== NULL
)
8247 sprintf_vma (buf
, value
);
8250 if (i_ehdrp
->e_ident
[EI_CLASS
] == ELFCLASS64
)
8252 #if BFD_HOST_64BIT_LONG
8253 sprintf (buf
, "%016lx", value
);
8255 sprintf (buf
, "%08lx%08lx", _bfd_int64_high (value
),
8256 _bfd_int64_low (value
));
8260 sprintf (buf
, "%08lx", (unsigned long) (value
& 0xffffffff));
8263 sprintf_vma (buf
, value
);
8268 _bfd_elf_fprintf_vma (bfd
*abfd ATTRIBUTE_UNUSED
, void *stream
, bfd_vma value
)
8271 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
8273 i_ehdrp
= elf_elfheader (abfd
);
8274 if (i_ehdrp
== NULL
)
8275 fprintf_vma ((FILE *) stream
, value
);
8278 if (i_ehdrp
->e_ident
[EI_CLASS
] == ELFCLASS64
)
8280 #if BFD_HOST_64BIT_LONG
8281 fprintf ((FILE *) stream
, "%016lx", value
);
8283 fprintf ((FILE *) stream
, "%08lx%08lx",
8284 _bfd_int64_high (value
), _bfd_int64_low (value
));
8288 fprintf ((FILE *) stream
, "%08lx",
8289 (unsigned long) (value
& 0xffffffff));
8292 fprintf_vma ((FILE *) stream
, value
);
8296 enum elf_reloc_type_class
8297 _bfd_elf_reloc_type_class (const Elf_Internal_Rela
*rela ATTRIBUTE_UNUSED
)
8299 return reloc_class_normal
;
8302 /* For RELA architectures, return the relocation value for a
8303 relocation against a local symbol. */
8306 _bfd_elf_rela_local_sym (bfd
*abfd
,
8307 Elf_Internal_Sym
*sym
,
8309 Elf_Internal_Rela
*rel
)
8311 asection
*sec
= *psec
;
8314 relocation
= (sec
->output_section
->vma
8315 + sec
->output_offset
8317 if ((sec
->flags
& SEC_MERGE
)
8318 && ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
8319 && sec
->sec_info_type
== ELF_INFO_TYPE_MERGE
)
8322 _bfd_merged_section_offset (abfd
, psec
,
8323 elf_section_data (sec
)->sec_info
,
8324 sym
->st_value
+ rel
->r_addend
);
8327 /* If we have changed the section, and our original section is
8328 marked with SEC_EXCLUDE, it means that the original
8329 SEC_MERGE section has been completely subsumed in some
8330 other SEC_MERGE section. In this case, we need to leave
8331 some info around for --emit-relocs. */
8332 if ((sec
->flags
& SEC_EXCLUDE
) != 0)
8333 sec
->kept_section
= *psec
;
8336 rel
->r_addend
-= relocation
;
8337 rel
->r_addend
+= sec
->output_section
->vma
+ sec
->output_offset
;
8343 _bfd_elf_rel_local_sym (bfd
*abfd
,
8344 Elf_Internal_Sym
*sym
,
8348 asection
*sec
= *psec
;
8350 if (sec
->sec_info_type
!= ELF_INFO_TYPE_MERGE
)
8351 return sym
->st_value
+ addend
;
8353 return _bfd_merged_section_offset (abfd
, psec
,
8354 elf_section_data (sec
)->sec_info
,
8355 sym
->st_value
+ addend
);
8359 _bfd_elf_section_offset (bfd
*abfd
,
8360 struct bfd_link_info
*info
,
8364 switch (sec
->sec_info_type
)
8366 case ELF_INFO_TYPE_STABS
:
8367 return _bfd_stab_section_offset (sec
, elf_section_data (sec
)->sec_info
,
8369 case ELF_INFO_TYPE_EH_FRAME
:
8370 return _bfd_elf_eh_frame_section_offset (abfd
, info
, sec
, offset
);
8376 /* Create a new BFD as if by bfd_openr. Rather than opening a file,
8377 reconstruct an ELF file by reading the segments out of remote memory
8378 based on the ELF file header at EHDR_VMA and the ELF program headers it
8379 points to. If not null, *LOADBASEP is filled in with the difference
8380 between the VMAs from which the segments were read, and the VMAs the
8381 file headers (and hence BFD's idea of each section's VMA) put them at.
8383 The function TARGET_READ_MEMORY is called to copy LEN bytes from the
8384 remote memory at target address VMA into the local buffer at MYADDR; it
8385 should return zero on success or an `errno' code on failure. TEMPL must
8386 be a BFD for an ELF target with the word size and byte order found in
8387 the remote memory. */
8390 bfd_elf_bfd_from_remote_memory
8394 int (*target_read_memory
) (bfd_vma
, bfd_byte
*, int))
8396 return (*get_elf_backend_data (templ
)->elf_backend_bfd_from_remote_memory
)
8397 (templ
, ehdr_vma
, loadbasep
, target_read_memory
);
8401 _bfd_elf_get_synthetic_symtab (bfd
*abfd
,
8402 long symcount ATTRIBUTE_UNUSED
,
8403 asymbol
**syms ATTRIBUTE_UNUSED
,
8408 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
8411 const char *relplt_name
;
8412 bfd_boolean (*slurp_relocs
) (bfd
*, asection
*, asymbol
**, bfd_boolean
);
8416 Elf_Internal_Shdr
*hdr
;
8422 if ((abfd
->flags
& (DYNAMIC
| EXEC_P
)) == 0)
8425 if (dynsymcount
<= 0)
8428 if (!bed
->plt_sym_val
)
8431 relplt_name
= bed
->relplt_name
;
8432 if (relplt_name
== NULL
)
8433 relplt_name
= bed
->default_use_rela_p
? ".rela.plt" : ".rel.plt";
8434 relplt
= bfd_get_section_by_name (abfd
, relplt_name
);
8438 hdr
= &elf_section_data (relplt
)->this_hdr
;
8439 if (hdr
->sh_link
!= elf_dynsymtab (abfd
)
8440 || (hdr
->sh_type
!= SHT_REL
&& hdr
->sh_type
!= SHT_RELA
))
8443 plt
= bfd_get_section_by_name (abfd
, ".plt");
8447 slurp_relocs
= get_elf_backend_data (abfd
)->s
->slurp_reloc_table
;
8448 if (! (*slurp_relocs
) (abfd
, relplt
, dynsyms
, TRUE
))
8451 count
= relplt
->size
/ hdr
->sh_entsize
;
8452 size
= count
* sizeof (asymbol
);
8453 p
= relplt
->relocation
;
8454 for (i
= 0; i
< count
; i
++, p
++)
8455 size
+= strlen ((*p
->sym_ptr_ptr
)->name
) + sizeof ("@plt");
8457 s
= *ret
= bfd_malloc (size
);
8461 names
= (char *) (s
+ count
);
8462 p
= relplt
->relocation
;
8464 for (i
= 0; i
< count
; i
++, s
++, p
++)
8469 addr
= bed
->plt_sym_val (i
, plt
, p
);
8470 if (addr
== (bfd_vma
) -1)
8473 *s
= **p
->sym_ptr_ptr
;
8474 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
8475 we are defining a symbol, ensure one of them is set. */
8476 if ((s
->flags
& BSF_LOCAL
) == 0)
8477 s
->flags
|= BSF_GLOBAL
;
8479 s
->value
= addr
- plt
->vma
;
8481 len
= strlen ((*p
->sym_ptr_ptr
)->name
);
8482 memcpy (names
, (*p
->sym_ptr_ptr
)->name
, len
);
8484 memcpy (names
, "@plt", sizeof ("@plt"));
8485 names
+= sizeof ("@plt");
8492 /* It is only used by x86-64 so far. */
8493 asection _bfd_elf_large_com_section
8494 = BFD_FAKE_SECTION (_bfd_elf_large_com_section
,
8495 SEC_IS_COMMON
, NULL
, "LARGE_COMMON", 0);
8498 _bfd_elf_set_osabi (bfd
* abfd
,
8499 struct bfd_link_info
* link_info ATTRIBUTE_UNUSED
)
8501 Elf_Internal_Ehdr
* i_ehdrp
; /* ELF file header, internal form. */
8503 i_ehdrp
= elf_elfheader (abfd
);
8505 i_ehdrp
->e_ident
[EI_OSABI
] = get_elf_backend_data (abfd
)->elf_osabi
;
8509 /* Return TRUE for ELF symbol types that represent functions.
8510 This is the default version of this function, which is sufficient for
8511 most targets. It returns true if TYPE is STT_FUNC. */
8514 _bfd_elf_is_function_type (unsigned int type
)
8516 return (type
== STT_FUNC
);