1 /* ELF executable support for BFD.
3 Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
4 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
6 This file is part of BFD, the Binary File Descriptor library.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
26 BFD support for ELF formats is being worked on.
27 Currently, the best supported back ends are for sparc and i386
28 (running svr4 or Solaris 2).
30 Documentation of the internals of the support code still needs
31 to be written. The code is changing quickly enough that we
32 haven't bothered yet. */
34 /* For sparc64-cross-sparc32. */
42 #include "libiberty.h"
44 static int elf_sort_sections (const void *, const void *);
45 static bfd_boolean
assign_file_positions_except_relocs (bfd
*, struct bfd_link_info
*);
46 static bfd_boolean
prep_headers (bfd
*);
47 static bfd_boolean
swap_out_syms (bfd
*, struct bfd_strtab_hash
**, int) ;
48 static bfd_boolean
elfcore_read_notes (bfd
*, file_ptr
, bfd_size_type
) ;
50 /* Swap version information in and out. The version information is
51 currently size independent. If that ever changes, this code will
52 need to move into elfcode.h. */
54 /* Swap in a Verdef structure. */
57 _bfd_elf_swap_verdef_in (bfd
*abfd
,
58 const Elf_External_Verdef
*src
,
59 Elf_Internal_Verdef
*dst
)
61 dst
->vd_version
= H_GET_16 (abfd
, src
->vd_version
);
62 dst
->vd_flags
= H_GET_16 (abfd
, src
->vd_flags
);
63 dst
->vd_ndx
= H_GET_16 (abfd
, src
->vd_ndx
);
64 dst
->vd_cnt
= H_GET_16 (abfd
, src
->vd_cnt
);
65 dst
->vd_hash
= H_GET_32 (abfd
, src
->vd_hash
);
66 dst
->vd_aux
= H_GET_32 (abfd
, src
->vd_aux
);
67 dst
->vd_next
= H_GET_32 (abfd
, src
->vd_next
);
70 /* Swap out a Verdef structure. */
73 _bfd_elf_swap_verdef_out (bfd
*abfd
,
74 const Elf_Internal_Verdef
*src
,
75 Elf_External_Verdef
*dst
)
77 H_PUT_16 (abfd
, src
->vd_version
, dst
->vd_version
);
78 H_PUT_16 (abfd
, src
->vd_flags
, dst
->vd_flags
);
79 H_PUT_16 (abfd
, src
->vd_ndx
, dst
->vd_ndx
);
80 H_PUT_16 (abfd
, src
->vd_cnt
, dst
->vd_cnt
);
81 H_PUT_32 (abfd
, src
->vd_hash
, dst
->vd_hash
);
82 H_PUT_32 (abfd
, src
->vd_aux
, dst
->vd_aux
);
83 H_PUT_32 (abfd
, src
->vd_next
, dst
->vd_next
);
86 /* Swap in a Verdaux structure. */
89 _bfd_elf_swap_verdaux_in (bfd
*abfd
,
90 const Elf_External_Verdaux
*src
,
91 Elf_Internal_Verdaux
*dst
)
93 dst
->vda_name
= H_GET_32 (abfd
, src
->vda_name
);
94 dst
->vda_next
= H_GET_32 (abfd
, src
->vda_next
);
97 /* Swap out a Verdaux structure. */
100 _bfd_elf_swap_verdaux_out (bfd
*abfd
,
101 const Elf_Internal_Verdaux
*src
,
102 Elf_External_Verdaux
*dst
)
104 H_PUT_32 (abfd
, src
->vda_name
, dst
->vda_name
);
105 H_PUT_32 (abfd
, src
->vda_next
, dst
->vda_next
);
108 /* Swap in a Verneed structure. */
111 _bfd_elf_swap_verneed_in (bfd
*abfd
,
112 const Elf_External_Verneed
*src
,
113 Elf_Internal_Verneed
*dst
)
115 dst
->vn_version
= H_GET_16 (abfd
, src
->vn_version
);
116 dst
->vn_cnt
= H_GET_16 (abfd
, src
->vn_cnt
);
117 dst
->vn_file
= H_GET_32 (abfd
, src
->vn_file
);
118 dst
->vn_aux
= H_GET_32 (abfd
, src
->vn_aux
);
119 dst
->vn_next
= H_GET_32 (abfd
, src
->vn_next
);
122 /* Swap out a Verneed structure. */
125 _bfd_elf_swap_verneed_out (bfd
*abfd
,
126 const Elf_Internal_Verneed
*src
,
127 Elf_External_Verneed
*dst
)
129 H_PUT_16 (abfd
, src
->vn_version
, dst
->vn_version
);
130 H_PUT_16 (abfd
, src
->vn_cnt
, dst
->vn_cnt
);
131 H_PUT_32 (abfd
, src
->vn_file
, dst
->vn_file
);
132 H_PUT_32 (abfd
, src
->vn_aux
, dst
->vn_aux
);
133 H_PUT_32 (abfd
, src
->vn_next
, dst
->vn_next
);
136 /* Swap in a Vernaux structure. */
139 _bfd_elf_swap_vernaux_in (bfd
*abfd
,
140 const Elf_External_Vernaux
*src
,
141 Elf_Internal_Vernaux
*dst
)
143 dst
->vna_hash
= H_GET_32 (abfd
, src
->vna_hash
);
144 dst
->vna_flags
= H_GET_16 (abfd
, src
->vna_flags
);
145 dst
->vna_other
= H_GET_16 (abfd
, src
->vna_other
);
146 dst
->vna_name
= H_GET_32 (abfd
, src
->vna_name
);
147 dst
->vna_next
= H_GET_32 (abfd
, src
->vna_next
);
150 /* Swap out a Vernaux structure. */
153 _bfd_elf_swap_vernaux_out (bfd
*abfd
,
154 const Elf_Internal_Vernaux
*src
,
155 Elf_External_Vernaux
*dst
)
157 H_PUT_32 (abfd
, src
->vna_hash
, dst
->vna_hash
);
158 H_PUT_16 (abfd
, src
->vna_flags
, dst
->vna_flags
);
159 H_PUT_16 (abfd
, src
->vna_other
, dst
->vna_other
);
160 H_PUT_32 (abfd
, src
->vna_name
, dst
->vna_name
);
161 H_PUT_32 (abfd
, src
->vna_next
, dst
->vna_next
);
164 /* Swap in a Versym structure. */
167 _bfd_elf_swap_versym_in (bfd
*abfd
,
168 const Elf_External_Versym
*src
,
169 Elf_Internal_Versym
*dst
)
171 dst
->vs_vers
= H_GET_16 (abfd
, src
->vs_vers
);
174 /* Swap out a Versym structure. */
177 _bfd_elf_swap_versym_out (bfd
*abfd
,
178 const Elf_Internal_Versym
*src
,
179 Elf_External_Versym
*dst
)
181 H_PUT_16 (abfd
, src
->vs_vers
, dst
->vs_vers
);
184 /* Standard ELF hash function. Do not change this function; you will
185 cause invalid hash tables to be generated. */
188 bfd_elf_hash (const char *namearg
)
190 const unsigned char *name
= (const unsigned char *) namearg
;
195 while ((ch
= *name
++) != '\0')
198 if ((g
= (h
& 0xf0000000)) != 0)
201 /* The ELF ABI says `h &= ~g', but this is equivalent in
202 this case and on some machines one insn instead of two. */
206 return h
& 0xffffffff;
210 bfd_elf_mkobject (bfd
*abfd
)
212 /* This just does initialization. */
213 /* coff_mkobject zalloc's space for tdata.coff_obj_data ... */
214 elf_tdata (abfd
) = bfd_zalloc (abfd
, sizeof (struct elf_obj_tdata
));
215 if (elf_tdata (abfd
) == 0)
217 /* Since everything is done at close time, do we need any
224 bfd_elf_mkcorefile (bfd
*abfd
)
226 /* I think this can be done just like an object file. */
227 return bfd_elf_mkobject (abfd
);
231 bfd_elf_get_str_section (bfd
*abfd
, unsigned int shindex
)
233 Elf_Internal_Shdr
**i_shdrp
;
234 bfd_byte
*shstrtab
= NULL
;
236 bfd_size_type shstrtabsize
;
238 i_shdrp
= elf_elfsections (abfd
);
239 if (i_shdrp
== 0 || i_shdrp
[shindex
] == 0)
242 shstrtab
= i_shdrp
[shindex
]->contents
;
243 if (shstrtab
== NULL
)
245 /* No cached one, attempt to read, and cache what we read. */
246 offset
= i_shdrp
[shindex
]->sh_offset
;
247 shstrtabsize
= i_shdrp
[shindex
]->sh_size
;
249 /* Allocate and clear an extra byte at the end, to prevent crashes
250 in case the string table is not terminated. */
251 if (shstrtabsize
+ 1 == 0
252 || (shstrtab
= bfd_alloc (abfd
, shstrtabsize
+ 1)) == NULL
253 || bfd_seek (abfd
, offset
, SEEK_SET
) != 0)
255 else if (bfd_bread (shstrtab
, shstrtabsize
, abfd
) != shstrtabsize
)
257 if (bfd_get_error () != bfd_error_system_call
)
258 bfd_set_error (bfd_error_file_truncated
);
262 shstrtab
[shstrtabsize
] = '\0';
263 i_shdrp
[shindex
]->contents
= shstrtab
;
265 return (char *) shstrtab
;
269 bfd_elf_string_from_elf_section (bfd
*abfd
,
270 unsigned int shindex
,
271 unsigned int strindex
)
273 Elf_Internal_Shdr
*hdr
;
278 hdr
= elf_elfsections (abfd
)[shindex
];
280 if (hdr
->contents
== NULL
281 && bfd_elf_get_str_section (abfd
, shindex
) == NULL
)
284 if (strindex
>= hdr
->sh_size
)
286 unsigned int shstrndx
= elf_elfheader(abfd
)->e_shstrndx
;
287 (*_bfd_error_handler
)
288 (_("%B: invalid string offset %u >= %lu for section `%s'"),
289 abfd
, strindex
, (unsigned long) hdr
->sh_size
,
290 (shindex
== shstrndx
&& strindex
== hdr
->sh_name
292 : bfd_elf_string_from_elf_section (abfd
, shstrndx
, hdr
->sh_name
)));
296 return ((char *) hdr
->contents
) + strindex
;
299 /* Read and convert symbols to internal format.
300 SYMCOUNT specifies the number of symbols to read, starting from
301 symbol SYMOFFSET. If any of INTSYM_BUF, EXTSYM_BUF or EXTSHNDX_BUF
302 are non-NULL, they are used to store the internal symbols, external
303 symbols, and symbol section index extensions, respectively. */
306 bfd_elf_get_elf_syms (bfd
*ibfd
,
307 Elf_Internal_Shdr
*symtab_hdr
,
310 Elf_Internal_Sym
*intsym_buf
,
312 Elf_External_Sym_Shndx
*extshndx_buf
)
314 Elf_Internal_Shdr
*shndx_hdr
;
316 const bfd_byte
*esym
;
317 Elf_External_Sym_Shndx
*alloc_extshndx
;
318 Elf_External_Sym_Shndx
*shndx
;
319 Elf_Internal_Sym
*isym
;
320 Elf_Internal_Sym
*isymend
;
321 const struct elf_backend_data
*bed
;
329 /* Normal syms might have section extension entries. */
331 if (symtab_hdr
== &elf_tdata (ibfd
)->symtab_hdr
)
332 shndx_hdr
= &elf_tdata (ibfd
)->symtab_shndx_hdr
;
334 /* Read the symbols. */
336 alloc_extshndx
= NULL
;
337 bed
= get_elf_backend_data (ibfd
);
338 extsym_size
= bed
->s
->sizeof_sym
;
339 amt
= symcount
* extsym_size
;
340 pos
= symtab_hdr
->sh_offset
+ symoffset
* extsym_size
;
341 if (extsym_buf
== NULL
)
343 alloc_ext
= bfd_malloc2 (symcount
, extsym_size
);
344 extsym_buf
= alloc_ext
;
346 if (extsym_buf
== NULL
347 || bfd_seek (ibfd
, pos
, SEEK_SET
) != 0
348 || bfd_bread (extsym_buf
, amt
, ibfd
) != amt
)
354 if (shndx_hdr
== NULL
|| shndx_hdr
->sh_size
== 0)
358 amt
= symcount
* sizeof (Elf_External_Sym_Shndx
);
359 pos
= shndx_hdr
->sh_offset
+ symoffset
* sizeof (Elf_External_Sym_Shndx
);
360 if (extshndx_buf
== NULL
)
362 alloc_extshndx
= bfd_malloc2 (symcount
,
363 sizeof (Elf_External_Sym_Shndx
));
364 extshndx_buf
= alloc_extshndx
;
366 if (extshndx_buf
== NULL
367 || bfd_seek (ibfd
, pos
, SEEK_SET
) != 0
368 || bfd_bread (extshndx_buf
, amt
, ibfd
) != amt
)
375 if (intsym_buf
== NULL
)
377 intsym_buf
= bfd_malloc2 (symcount
, sizeof (Elf_Internal_Sym
));
378 if (intsym_buf
== NULL
)
382 /* Convert the symbols to internal form. */
383 isymend
= intsym_buf
+ symcount
;
384 for (esym
= extsym_buf
, isym
= intsym_buf
, shndx
= extshndx_buf
;
386 esym
+= extsym_size
, isym
++, shndx
= shndx
!= NULL
? shndx
+ 1 : NULL
)
387 (*bed
->s
->swap_symbol_in
) (ibfd
, esym
, shndx
, isym
);
390 if (alloc_ext
!= NULL
)
392 if (alloc_extshndx
!= NULL
)
393 free (alloc_extshndx
);
398 /* Look up a symbol name. */
400 bfd_elf_sym_name (bfd
*abfd
,
401 Elf_Internal_Shdr
*symtab_hdr
,
402 Elf_Internal_Sym
*isym
,
406 unsigned int iname
= isym
->st_name
;
407 unsigned int shindex
= symtab_hdr
->sh_link
;
409 if (iname
== 0 && ELF_ST_TYPE (isym
->st_info
) == STT_SECTION
410 /* Check for a bogus st_shndx to avoid crashing. */
411 && isym
->st_shndx
< elf_numsections (abfd
)
412 && !(isym
->st_shndx
>= SHN_LORESERVE
&& isym
->st_shndx
<= SHN_HIRESERVE
))
414 iname
= elf_elfsections (abfd
)[isym
->st_shndx
]->sh_name
;
415 shindex
= elf_elfheader (abfd
)->e_shstrndx
;
418 name
= bfd_elf_string_from_elf_section (abfd
, shindex
, iname
);
421 else if (sym_sec
&& *name
== '\0')
422 name
= bfd_section_name (abfd
, sym_sec
);
427 /* Elf_Internal_Shdr->contents is an array of these for SHT_GROUP
428 sections. The first element is the flags, the rest are section
431 typedef union elf_internal_group
{
432 Elf_Internal_Shdr
*shdr
;
434 } Elf_Internal_Group
;
436 /* Return the name of the group signature symbol. Why isn't the
437 signature just a string? */
440 group_signature (bfd
*abfd
, Elf_Internal_Shdr
*ghdr
)
442 Elf_Internal_Shdr
*hdr
;
443 unsigned char esym
[sizeof (Elf64_External_Sym
)];
444 Elf_External_Sym_Shndx eshndx
;
445 Elf_Internal_Sym isym
;
447 /* First we need to ensure the symbol table is available. Make sure
448 that it is a symbol table section. */
449 hdr
= elf_elfsections (abfd
) [ghdr
->sh_link
];
450 if (hdr
->sh_type
!= SHT_SYMTAB
451 || ! bfd_section_from_shdr (abfd
, ghdr
->sh_link
))
454 /* Go read the symbol. */
455 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
456 if (bfd_elf_get_elf_syms (abfd
, hdr
, 1, ghdr
->sh_info
,
457 &isym
, esym
, &eshndx
) == NULL
)
460 return bfd_elf_sym_name (abfd
, hdr
, &isym
, NULL
);
463 /* Set next_in_group list pointer, and group name for NEWSECT. */
466 setup_group (bfd
*abfd
, Elf_Internal_Shdr
*hdr
, asection
*newsect
)
468 unsigned int num_group
= elf_tdata (abfd
)->num_group
;
470 /* If num_group is zero, read in all SHT_GROUP sections. The count
471 is set to -1 if there are no SHT_GROUP sections. */
474 unsigned int i
, shnum
;
476 /* First count the number of groups. If we have a SHT_GROUP
477 section with just a flag word (ie. sh_size is 4), ignore it. */
478 shnum
= elf_numsections (abfd
);
480 for (i
= 0; i
< shnum
; i
++)
482 Elf_Internal_Shdr
*shdr
= elf_elfsections (abfd
)[i
];
483 if (shdr
->sh_type
== SHT_GROUP
&& shdr
->sh_size
>= 8)
489 num_group
= (unsigned) -1;
490 elf_tdata (abfd
)->num_group
= num_group
;
494 /* We keep a list of elf section headers for group sections,
495 so we can find them quickly. */
498 elf_tdata (abfd
)->num_group
= num_group
;
499 elf_tdata (abfd
)->group_sect_ptr
500 = bfd_alloc2 (abfd
, num_group
, sizeof (Elf_Internal_Shdr
*));
501 if (elf_tdata (abfd
)->group_sect_ptr
== NULL
)
505 for (i
= 0; i
< shnum
; i
++)
507 Elf_Internal_Shdr
*shdr
= elf_elfsections (abfd
)[i
];
508 if (shdr
->sh_type
== SHT_GROUP
&& shdr
->sh_size
>= 8)
511 Elf_Internal_Group
*dest
;
513 /* Add to list of sections. */
514 elf_tdata (abfd
)->group_sect_ptr
[num_group
] = shdr
;
517 /* Read the raw contents. */
518 BFD_ASSERT (sizeof (*dest
) >= 4);
519 amt
= shdr
->sh_size
* sizeof (*dest
) / 4;
520 shdr
->contents
= bfd_alloc2 (abfd
, shdr
->sh_size
,
522 if (shdr
->contents
== NULL
523 || bfd_seek (abfd
, shdr
->sh_offset
, SEEK_SET
) != 0
524 || (bfd_bread (shdr
->contents
, shdr
->sh_size
, abfd
)
528 /* Translate raw contents, a flag word followed by an
529 array of elf section indices all in target byte order,
530 to the flag word followed by an array of elf section
532 src
= shdr
->contents
+ shdr
->sh_size
;
533 dest
= (Elf_Internal_Group
*) (shdr
->contents
+ amt
);
540 idx
= H_GET_32 (abfd
, src
);
541 if (src
== shdr
->contents
)
544 if (shdr
->bfd_section
!= NULL
&& (idx
& GRP_COMDAT
))
545 shdr
->bfd_section
->flags
546 |= SEC_LINK_ONCE
| SEC_LINK_DUPLICATES_DISCARD
;
551 ((*_bfd_error_handler
)
552 (_("%B: invalid SHT_GROUP entry"), abfd
));
555 dest
->shdr
= elf_elfsections (abfd
)[idx
];
562 if (num_group
!= (unsigned) -1)
566 for (i
= 0; i
< num_group
; i
++)
568 Elf_Internal_Shdr
*shdr
= elf_tdata (abfd
)->group_sect_ptr
[i
];
569 Elf_Internal_Group
*idx
= (Elf_Internal_Group
*) shdr
->contents
;
570 unsigned int n_elt
= shdr
->sh_size
/ 4;
572 /* Look through this group's sections to see if current
573 section is a member. */
575 if ((++idx
)->shdr
== hdr
)
579 /* We are a member of this group. Go looking through
580 other members to see if any others are linked via
582 idx
= (Elf_Internal_Group
*) shdr
->contents
;
583 n_elt
= shdr
->sh_size
/ 4;
585 if ((s
= (++idx
)->shdr
->bfd_section
) != NULL
586 && elf_next_in_group (s
) != NULL
)
590 /* Snarf the group name from other member, and
591 insert current section in circular list. */
592 elf_group_name (newsect
) = elf_group_name (s
);
593 elf_next_in_group (newsect
) = elf_next_in_group (s
);
594 elf_next_in_group (s
) = newsect
;
600 gname
= group_signature (abfd
, shdr
);
603 elf_group_name (newsect
) = gname
;
605 /* Start a circular list with one element. */
606 elf_next_in_group (newsect
) = newsect
;
609 /* If the group section has been created, point to the
611 if (shdr
->bfd_section
!= NULL
)
612 elf_next_in_group (shdr
->bfd_section
) = newsect
;
620 if (elf_group_name (newsect
) == NULL
)
622 (*_bfd_error_handler
) (_("%B: no group info for section %A"),
629 _bfd_elf_setup_sections (bfd
*abfd
)
632 unsigned int num_group
= elf_tdata (abfd
)->num_group
;
633 bfd_boolean result
= TRUE
;
636 /* Process SHF_LINK_ORDER. */
637 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
639 Elf_Internal_Shdr
*this_hdr
= &elf_section_data (s
)->this_hdr
;
640 if ((this_hdr
->sh_flags
& SHF_LINK_ORDER
) != 0)
642 unsigned int elfsec
= this_hdr
->sh_link
;
643 /* FIXME: The old Intel compiler and old strip/objcopy may
644 not set the sh_link or sh_info fields. Hence we could
645 get the situation where elfsec is 0. */
648 const struct elf_backend_data
*bed
649 = get_elf_backend_data (abfd
);
650 if (bed
->link_order_error_handler
)
651 bed
->link_order_error_handler
652 (_("%B: warning: sh_link not set for section `%A'"),
659 this_hdr
= elf_elfsections (abfd
)[elfsec
];
662 Some strip/objcopy may leave an incorrect value in
663 sh_link. We don't want to proceed. */
664 link
= this_hdr
->bfd_section
;
667 (*_bfd_error_handler
)
668 (_("%B: sh_link [%d] in section `%A' is incorrect"),
669 s
->owner
, s
, elfsec
);
673 elf_linked_to_section (s
) = link
;
678 /* Process section groups. */
679 if (num_group
== (unsigned) -1)
682 for (i
= 0; i
< num_group
; i
++)
684 Elf_Internal_Shdr
*shdr
= elf_tdata (abfd
)->group_sect_ptr
[i
];
685 Elf_Internal_Group
*idx
= (Elf_Internal_Group
*) shdr
->contents
;
686 unsigned int n_elt
= shdr
->sh_size
/ 4;
689 if ((++idx
)->shdr
->bfd_section
)
690 elf_sec_group (idx
->shdr
->bfd_section
) = shdr
->bfd_section
;
691 else if (idx
->shdr
->sh_type
== SHT_RELA
692 || idx
->shdr
->sh_type
== SHT_REL
)
693 /* We won't include relocation sections in section groups in
694 output object files. We adjust the group section size here
695 so that relocatable link will work correctly when
696 relocation sections are in section group in input object
698 shdr
->bfd_section
->size
-= 4;
701 /* There are some unknown sections in the group. */
702 (*_bfd_error_handler
)
703 (_("%B: unknown [%d] section `%s' in group [%s]"),
705 (unsigned int) idx
->shdr
->sh_type
,
706 bfd_elf_string_from_elf_section (abfd
,
707 (elf_elfheader (abfd
)
710 shdr
->bfd_section
->name
);
718 bfd_elf_is_group_section (bfd
*abfd ATTRIBUTE_UNUSED
, const asection
*sec
)
720 return elf_next_in_group (sec
) != NULL
;
723 /* Make a BFD section from an ELF section. We store a pointer to the
724 BFD section in the bfd_section field of the header. */
727 _bfd_elf_make_section_from_shdr (bfd
*abfd
,
728 Elf_Internal_Shdr
*hdr
,
734 const struct elf_backend_data
*bed
;
736 if (hdr
->bfd_section
!= NULL
)
738 BFD_ASSERT (strcmp (name
,
739 bfd_get_section_name (abfd
, hdr
->bfd_section
)) == 0);
743 newsect
= bfd_make_section_anyway (abfd
, name
);
747 hdr
->bfd_section
= newsect
;
748 elf_section_data (newsect
)->this_hdr
= *hdr
;
749 elf_section_data (newsect
)->this_idx
= shindex
;
751 /* Always use the real type/flags. */
752 elf_section_type (newsect
) = hdr
->sh_type
;
753 elf_section_flags (newsect
) = hdr
->sh_flags
;
755 newsect
->filepos
= hdr
->sh_offset
;
757 if (! bfd_set_section_vma (abfd
, newsect
, hdr
->sh_addr
)
758 || ! bfd_set_section_size (abfd
, newsect
, hdr
->sh_size
)
759 || ! bfd_set_section_alignment (abfd
, newsect
,
760 bfd_log2 ((bfd_vma
) hdr
->sh_addralign
)))
763 flags
= SEC_NO_FLAGS
;
764 if (hdr
->sh_type
!= SHT_NOBITS
)
765 flags
|= SEC_HAS_CONTENTS
;
766 if (hdr
->sh_type
== SHT_GROUP
)
767 flags
|= SEC_GROUP
| SEC_EXCLUDE
;
768 if ((hdr
->sh_flags
& SHF_ALLOC
) != 0)
771 if (hdr
->sh_type
!= SHT_NOBITS
)
774 if ((hdr
->sh_flags
& SHF_WRITE
) == 0)
775 flags
|= SEC_READONLY
;
776 if ((hdr
->sh_flags
& SHF_EXECINSTR
) != 0)
778 else if ((flags
& SEC_LOAD
) != 0)
780 if ((hdr
->sh_flags
& SHF_MERGE
) != 0)
783 newsect
->entsize
= hdr
->sh_entsize
;
784 if ((hdr
->sh_flags
& SHF_STRINGS
) != 0)
785 flags
|= SEC_STRINGS
;
787 if (hdr
->sh_flags
& SHF_GROUP
)
788 if (!setup_group (abfd
, hdr
, newsect
))
790 if ((hdr
->sh_flags
& SHF_TLS
) != 0)
791 flags
|= SEC_THREAD_LOCAL
;
793 if ((flags
& SEC_ALLOC
) == 0)
795 /* The debugging sections appear to be recognized only by name,
796 not any sort of flag. Their SEC_ALLOC bits are cleared. */
801 } debug_sections
[] =
803 { "debug", 5 }, /* 'd' */
804 { NULL
, 0 }, /* 'e' */
805 { NULL
, 0 }, /* 'f' */
806 { "gnu.linkonce.wi.", 17 }, /* 'g' */
807 { NULL
, 0 }, /* 'h' */
808 { NULL
, 0 }, /* 'i' */
809 { NULL
, 0 }, /* 'j' */
810 { NULL
, 0 }, /* 'k' */
811 { "line", 4 }, /* 'l' */
812 { NULL
, 0 }, /* 'm' */
813 { NULL
, 0 }, /* 'n' */
814 { NULL
, 0 }, /* 'o' */
815 { NULL
, 0 }, /* 'p' */
816 { NULL
, 0 }, /* 'q' */
817 { NULL
, 0 }, /* 'r' */
818 { "stab", 4 } /* 's' */
823 int i
= name
[1] - 'd';
825 && i
< (int) ARRAY_SIZE (debug_sections
)
826 && debug_sections
[i
].name
!= NULL
827 && strncmp (&name
[1], debug_sections
[i
].name
,
828 debug_sections
[i
].len
) == 0)
829 flags
|= SEC_DEBUGGING
;
833 /* As a GNU extension, if the name begins with .gnu.linkonce, we
834 only link a single copy of the section. This is used to support
835 g++. g++ will emit each template expansion in its own section.
836 The symbols will be defined as weak, so that multiple definitions
837 are permitted. The GNU linker extension is to actually discard
838 all but one of the sections. */
839 if (strncmp (name
, ".gnu.linkonce", sizeof ".gnu.linkonce" - 1) == 0
840 && elf_next_in_group (newsect
) == NULL
)
841 flags
|= SEC_LINK_ONCE
| SEC_LINK_DUPLICATES_DISCARD
;
843 bed
= get_elf_backend_data (abfd
);
844 if (bed
->elf_backend_section_flags
)
845 if (! bed
->elf_backend_section_flags (&flags
, hdr
))
848 if (! bfd_set_section_flags (abfd
, newsect
, flags
))
851 if ((flags
& SEC_ALLOC
) != 0)
853 Elf_Internal_Phdr
*phdr
;
856 /* Look through the phdrs to see if we need to adjust the lma.
857 If all the p_paddr fields are zero, we ignore them, since
858 some ELF linkers produce such output. */
859 phdr
= elf_tdata (abfd
)->phdr
;
860 for (i
= 0; i
< elf_elfheader (abfd
)->e_phnum
; i
++, phdr
++)
862 if (phdr
->p_paddr
!= 0)
865 if (i
< elf_elfheader (abfd
)->e_phnum
)
867 phdr
= elf_tdata (abfd
)->phdr
;
868 for (i
= 0; i
< elf_elfheader (abfd
)->e_phnum
; i
++, phdr
++)
870 /* This section is part of this segment if its file
871 offset plus size lies within the segment's memory
872 span and, if the section is loaded, the extent of the
873 loaded data lies within the extent of the segment.
875 Note - we used to check the p_paddr field as well, and
876 refuse to set the LMA if it was 0. This is wrong
877 though, as a perfectly valid initialised segment can
878 have a p_paddr of zero. Some architectures, eg ARM,
879 place special significance on the address 0 and
880 executables need to be able to have a segment which
881 covers this address. */
882 if (phdr
->p_type
== PT_LOAD
883 && (bfd_vma
) hdr
->sh_offset
>= phdr
->p_offset
884 && (hdr
->sh_offset
+ hdr
->sh_size
885 <= phdr
->p_offset
+ phdr
->p_memsz
)
886 && ((flags
& SEC_LOAD
) == 0
887 || (hdr
->sh_offset
+ hdr
->sh_size
888 <= phdr
->p_offset
+ phdr
->p_filesz
)))
890 if ((flags
& SEC_LOAD
) == 0)
891 newsect
->lma
= (phdr
->p_paddr
892 + hdr
->sh_addr
- phdr
->p_vaddr
);
894 /* We used to use the same adjustment for SEC_LOAD
895 sections, but that doesn't work if the segment
896 is packed with code from multiple VMAs.
897 Instead we calculate the section LMA based on
898 the segment LMA. It is assumed that the
899 segment will contain sections with contiguous
900 LMAs, even if the VMAs are not. */
901 newsect
->lma
= (phdr
->p_paddr
902 + hdr
->sh_offset
- phdr
->p_offset
);
904 /* With contiguous segments, we can't tell from file
905 offsets whether a section with zero size should
906 be placed at the end of one segment or the
907 beginning of the next. Decide based on vaddr. */
908 if (hdr
->sh_addr
>= phdr
->p_vaddr
909 && (hdr
->sh_addr
+ hdr
->sh_size
910 <= phdr
->p_vaddr
+ phdr
->p_memsz
))
925 struct elf_internal_shdr *bfd_elf_find_section (bfd *abfd, char *name);
928 Helper functions for GDB to locate the string tables.
929 Since BFD hides string tables from callers, GDB needs to use an
930 internal hook to find them. Sun's .stabstr, in particular,
931 isn't even pointed to by the .stab section, so ordinary
932 mechanisms wouldn't work to find it, even if we had some.
935 struct elf_internal_shdr
*
936 bfd_elf_find_section (bfd
*abfd
, char *name
)
938 Elf_Internal_Shdr
**i_shdrp
;
943 i_shdrp
= elf_elfsections (abfd
);
946 shstrtab
= bfd_elf_get_str_section (abfd
,
947 elf_elfheader (abfd
)->e_shstrndx
);
948 if (shstrtab
!= NULL
)
950 max
= elf_numsections (abfd
);
951 for (i
= 1; i
< max
; i
++)
952 if (!strcmp (&shstrtab
[i_shdrp
[i
]->sh_name
], name
))
959 const char *const bfd_elf_section_type_names
[] = {
960 "SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB",
961 "SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE",
962 "SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM",
965 /* ELF relocs are against symbols. If we are producing relocatable
966 output, and the reloc is against an external symbol, and nothing
967 has given us any additional addend, the resulting reloc will also
968 be against the same symbol. In such a case, we don't want to
969 change anything about the way the reloc is handled, since it will
970 all be done at final link time. Rather than put special case code
971 into bfd_perform_relocation, all the reloc types use this howto
972 function. It just short circuits the reloc if producing
973 relocatable output against an external symbol. */
975 bfd_reloc_status_type
976 bfd_elf_generic_reloc (bfd
*abfd ATTRIBUTE_UNUSED
,
977 arelent
*reloc_entry
,
979 void *data ATTRIBUTE_UNUSED
,
980 asection
*input_section
,
982 char **error_message ATTRIBUTE_UNUSED
)
984 if (output_bfd
!= NULL
985 && (symbol
->flags
& BSF_SECTION_SYM
) == 0
986 && (! reloc_entry
->howto
->partial_inplace
987 || reloc_entry
->addend
== 0))
989 reloc_entry
->address
+= input_section
->output_offset
;
993 return bfd_reloc_continue
;
996 /* Make sure sec_info_type is cleared if sec_info is cleared too. */
999 merge_sections_remove_hook (bfd
*abfd ATTRIBUTE_UNUSED
,
1002 BFD_ASSERT (sec
->sec_info_type
== ELF_INFO_TYPE_MERGE
);
1003 sec
->sec_info_type
= ELF_INFO_TYPE_NONE
;
1006 /* Finish SHF_MERGE section merging. */
1009 _bfd_elf_merge_sections (bfd
*abfd
, struct bfd_link_info
*info
)
1014 if (!is_elf_hash_table (info
->hash
))
1017 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
1018 if ((ibfd
->flags
& DYNAMIC
) == 0)
1019 for (sec
= ibfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
1020 if ((sec
->flags
& SEC_MERGE
) != 0
1021 && !bfd_is_abs_section (sec
->output_section
))
1023 struct bfd_elf_section_data
*secdata
;
1025 secdata
= elf_section_data (sec
);
1026 if (! _bfd_add_merge_section (abfd
,
1027 &elf_hash_table (info
)->merge_info
,
1028 sec
, &secdata
->sec_info
))
1030 else if (secdata
->sec_info
)
1031 sec
->sec_info_type
= ELF_INFO_TYPE_MERGE
;
1034 if (elf_hash_table (info
)->merge_info
!= NULL
)
1035 _bfd_merge_sections (abfd
, info
, elf_hash_table (info
)->merge_info
,
1036 merge_sections_remove_hook
);
1041 _bfd_elf_link_just_syms (asection
*sec
, struct bfd_link_info
*info
)
1043 sec
->output_section
= bfd_abs_section_ptr
;
1044 sec
->output_offset
= sec
->vma
;
1045 if (!is_elf_hash_table (info
->hash
))
1048 sec
->sec_info_type
= ELF_INFO_TYPE_JUST_SYMS
;
1051 /* Copy the program header and other data from one object module to
1055 _bfd_elf_copy_private_bfd_data (bfd
*ibfd
, bfd
*obfd
)
1057 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
1058 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
1061 BFD_ASSERT (!elf_flags_init (obfd
)
1062 || (elf_elfheader (obfd
)->e_flags
1063 == elf_elfheader (ibfd
)->e_flags
));
1065 elf_gp (obfd
) = elf_gp (ibfd
);
1066 elf_elfheader (obfd
)->e_flags
= elf_elfheader (ibfd
)->e_flags
;
1067 elf_flags_init (obfd
) = TRUE
;
1071 /* Print out the program headers. */
1074 _bfd_elf_print_private_bfd_data (bfd
*abfd
, void *farg
)
1077 Elf_Internal_Phdr
*p
;
1079 bfd_byte
*dynbuf
= NULL
;
1081 p
= elf_tdata (abfd
)->phdr
;
1086 fprintf (f
, _("\nProgram Header:\n"));
1087 c
= elf_elfheader (abfd
)->e_phnum
;
1088 for (i
= 0; i
< c
; i
++, p
++)
1095 case PT_NULL
: pt
= "NULL"; break;
1096 case PT_LOAD
: pt
= "LOAD"; break;
1097 case PT_DYNAMIC
: pt
= "DYNAMIC"; break;
1098 case PT_INTERP
: pt
= "INTERP"; break;
1099 case PT_NOTE
: pt
= "NOTE"; break;
1100 case PT_SHLIB
: pt
= "SHLIB"; break;
1101 case PT_PHDR
: pt
= "PHDR"; break;
1102 case PT_TLS
: pt
= "TLS"; break;
1103 case PT_GNU_EH_FRAME
: pt
= "EH_FRAME"; break;
1104 case PT_GNU_STACK
: pt
= "STACK"; break;
1105 case PT_GNU_RELRO
: pt
= "RELRO"; break;
1106 default: sprintf (buf
, "0x%lx", p
->p_type
); pt
= buf
; break;
1108 fprintf (f
, "%8s off 0x", pt
);
1109 bfd_fprintf_vma (abfd
, f
, p
->p_offset
);
1110 fprintf (f
, " vaddr 0x");
1111 bfd_fprintf_vma (abfd
, f
, p
->p_vaddr
);
1112 fprintf (f
, " paddr 0x");
1113 bfd_fprintf_vma (abfd
, f
, p
->p_paddr
);
1114 fprintf (f
, " align 2**%u\n", bfd_log2 (p
->p_align
));
1115 fprintf (f
, " filesz 0x");
1116 bfd_fprintf_vma (abfd
, f
, p
->p_filesz
);
1117 fprintf (f
, " memsz 0x");
1118 bfd_fprintf_vma (abfd
, f
, p
->p_memsz
);
1119 fprintf (f
, " flags %c%c%c",
1120 (p
->p_flags
& PF_R
) != 0 ? 'r' : '-',
1121 (p
->p_flags
& PF_W
) != 0 ? 'w' : '-',
1122 (p
->p_flags
& PF_X
) != 0 ? 'x' : '-');
1123 if ((p
->p_flags
&~ (unsigned) (PF_R
| PF_W
| PF_X
)) != 0)
1124 fprintf (f
, " %lx", p
->p_flags
&~ (unsigned) (PF_R
| PF_W
| PF_X
));
1129 s
= bfd_get_section_by_name (abfd
, ".dynamic");
1133 unsigned long shlink
;
1134 bfd_byte
*extdyn
, *extdynend
;
1136 void (*swap_dyn_in
) (bfd
*, const void *, Elf_Internal_Dyn
*);
1138 fprintf (f
, _("\nDynamic Section:\n"));
1140 if (!bfd_malloc_and_get_section (abfd
, s
, &dynbuf
))
1143 elfsec
= _bfd_elf_section_from_bfd_section (abfd
, s
);
1146 shlink
= elf_elfsections (abfd
)[elfsec
]->sh_link
;
1148 extdynsize
= get_elf_backend_data (abfd
)->s
->sizeof_dyn
;
1149 swap_dyn_in
= get_elf_backend_data (abfd
)->s
->swap_dyn_in
;
1152 extdynend
= extdyn
+ s
->size
;
1153 for (; extdyn
< extdynend
; extdyn
+= extdynsize
)
1155 Elf_Internal_Dyn dyn
;
1158 bfd_boolean stringp
;
1160 (*swap_dyn_in
) (abfd
, extdyn
, &dyn
);
1162 if (dyn
.d_tag
== DT_NULL
)
1169 sprintf (ab
, "0x%lx", (unsigned long) dyn
.d_tag
);
1173 case DT_NEEDED
: name
= "NEEDED"; stringp
= TRUE
; break;
1174 case DT_PLTRELSZ
: name
= "PLTRELSZ"; break;
1175 case DT_PLTGOT
: name
= "PLTGOT"; break;
1176 case DT_HASH
: name
= "HASH"; break;
1177 case DT_STRTAB
: name
= "STRTAB"; break;
1178 case DT_SYMTAB
: name
= "SYMTAB"; break;
1179 case DT_RELA
: name
= "RELA"; break;
1180 case DT_RELASZ
: name
= "RELASZ"; break;
1181 case DT_RELAENT
: name
= "RELAENT"; break;
1182 case DT_STRSZ
: name
= "STRSZ"; break;
1183 case DT_SYMENT
: name
= "SYMENT"; break;
1184 case DT_INIT
: name
= "INIT"; break;
1185 case DT_FINI
: name
= "FINI"; break;
1186 case DT_SONAME
: name
= "SONAME"; stringp
= TRUE
; break;
1187 case DT_RPATH
: name
= "RPATH"; stringp
= TRUE
; break;
1188 case DT_SYMBOLIC
: name
= "SYMBOLIC"; break;
1189 case DT_REL
: name
= "REL"; break;
1190 case DT_RELSZ
: name
= "RELSZ"; break;
1191 case DT_RELENT
: name
= "RELENT"; break;
1192 case DT_PLTREL
: name
= "PLTREL"; break;
1193 case DT_DEBUG
: name
= "DEBUG"; break;
1194 case DT_TEXTREL
: name
= "TEXTREL"; break;
1195 case DT_JMPREL
: name
= "JMPREL"; break;
1196 case DT_BIND_NOW
: name
= "BIND_NOW"; break;
1197 case DT_INIT_ARRAY
: name
= "INIT_ARRAY"; break;
1198 case DT_FINI_ARRAY
: name
= "FINI_ARRAY"; break;
1199 case DT_INIT_ARRAYSZ
: name
= "INIT_ARRAYSZ"; break;
1200 case DT_FINI_ARRAYSZ
: name
= "FINI_ARRAYSZ"; break;
1201 case DT_RUNPATH
: name
= "RUNPATH"; stringp
= TRUE
; break;
1202 case DT_FLAGS
: name
= "FLAGS"; break;
1203 case DT_PREINIT_ARRAY
: name
= "PREINIT_ARRAY"; break;
1204 case DT_PREINIT_ARRAYSZ
: name
= "PREINIT_ARRAYSZ"; break;
1205 case DT_CHECKSUM
: name
= "CHECKSUM"; break;
1206 case DT_PLTPADSZ
: name
= "PLTPADSZ"; break;
1207 case DT_MOVEENT
: name
= "MOVEENT"; break;
1208 case DT_MOVESZ
: name
= "MOVESZ"; break;
1209 case DT_FEATURE
: name
= "FEATURE"; break;
1210 case DT_POSFLAG_1
: name
= "POSFLAG_1"; break;
1211 case DT_SYMINSZ
: name
= "SYMINSZ"; break;
1212 case DT_SYMINENT
: name
= "SYMINENT"; break;
1213 case DT_CONFIG
: name
= "CONFIG"; stringp
= TRUE
; break;
1214 case DT_DEPAUDIT
: name
= "DEPAUDIT"; stringp
= TRUE
; break;
1215 case DT_AUDIT
: name
= "AUDIT"; stringp
= TRUE
; break;
1216 case DT_PLTPAD
: name
= "PLTPAD"; break;
1217 case DT_MOVETAB
: name
= "MOVETAB"; break;
1218 case DT_SYMINFO
: name
= "SYMINFO"; break;
1219 case DT_RELACOUNT
: name
= "RELACOUNT"; break;
1220 case DT_RELCOUNT
: name
= "RELCOUNT"; break;
1221 case DT_FLAGS_1
: name
= "FLAGS_1"; break;
1222 case DT_VERSYM
: name
= "VERSYM"; break;
1223 case DT_VERDEF
: name
= "VERDEF"; break;
1224 case DT_VERDEFNUM
: name
= "VERDEFNUM"; break;
1225 case DT_VERNEED
: name
= "VERNEED"; break;
1226 case DT_VERNEEDNUM
: name
= "VERNEEDNUM"; break;
1227 case DT_AUXILIARY
: name
= "AUXILIARY"; stringp
= TRUE
; break;
1228 case DT_USED
: name
= "USED"; break;
1229 case DT_FILTER
: name
= "FILTER"; stringp
= TRUE
; break;
1232 fprintf (f
, " %-11s ", name
);
1234 fprintf (f
, "0x%lx", (unsigned long) dyn
.d_un
.d_val
);
1238 unsigned int tagv
= dyn
.d_un
.d_val
;
1240 string
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
1243 fprintf (f
, "%s", string
);
1252 if ((elf_dynverdef (abfd
) != 0 && elf_tdata (abfd
)->verdef
== NULL
)
1253 || (elf_dynverref (abfd
) != 0 && elf_tdata (abfd
)->verref
== NULL
))
1255 if (! _bfd_elf_slurp_version_tables (abfd
, FALSE
))
1259 if (elf_dynverdef (abfd
) != 0)
1261 Elf_Internal_Verdef
*t
;
1263 fprintf (f
, _("\nVersion definitions:\n"));
1264 for (t
= elf_tdata (abfd
)->verdef
; t
!= NULL
; t
= t
->vd_nextdef
)
1266 fprintf (f
, "%d 0x%2.2x 0x%8.8lx %s\n", t
->vd_ndx
,
1267 t
->vd_flags
, t
->vd_hash
,
1268 t
->vd_nodename
? t
->vd_nodename
: "<corrupt>");
1269 if (t
->vd_auxptr
!= NULL
&& t
->vd_auxptr
->vda_nextptr
!= NULL
)
1271 Elf_Internal_Verdaux
*a
;
1274 for (a
= t
->vd_auxptr
->vda_nextptr
;
1278 a
->vda_nodename
? a
->vda_nodename
: "<corrupt>");
1284 if (elf_dynverref (abfd
) != 0)
1286 Elf_Internal_Verneed
*t
;
1288 fprintf (f
, _("\nVersion References:\n"));
1289 for (t
= elf_tdata (abfd
)->verref
; t
!= NULL
; t
= t
->vn_nextref
)
1291 Elf_Internal_Vernaux
*a
;
1293 fprintf (f
, _(" required from %s:\n"),
1294 t
->vn_filename
? t
->vn_filename
: "<corrupt>");
1295 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
1296 fprintf (f
, " 0x%8.8lx 0x%2.2x %2.2d %s\n", a
->vna_hash
,
1297 a
->vna_flags
, a
->vna_other
,
1298 a
->vna_nodename
? a
->vna_nodename
: "<corrupt>");
1310 /* Display ELF-specific fields of a symbol. */
1313 bfd_elf_print_symbol (bfd
*abfd
,
1316 bfd_print_symbol_type how
)
1321 case bfd_print_symbol_name
:
1322 fprintf (file
, "%s", symbol
->name
);
1324 case bfd_print_symbol_more
:
1325 fprintf (file
, "elf ");
1326 bfd_fprintf_vma (abfd
, file
, symbol
->value
);
1327 fprintf (file
, " %lx", (long) symbol
->flags
);
1329 case bfd_print_symbol_all
:
1331 const char *section_name
;
1332 const char *name
= NULL
;
1333 const struct elf_backend_data
*bed
;
1334 unsigned char st_other
;
1337 section_name
= symbol
->section
? symbol
->section
->name
: "(*none*)";
1339 bed
= get_elf_backend_data (abfd
);
1340 if (bed
->elf_backend_print_symbol_all
)
1341 name
= (*bed
->elf_backend_print_symbol_all
) (abfd
, filep
, symbol
);
1345 name
= symbol
->name
;
1346 bfd_print_symbol_vandf (abfd
, file
, symbol
);
1349 fprintf (file
, " %s\t", section_name
);
1350 /* Print the "other" value for a symbol. For common symbols,
1351 we've already printed the size; now print the alignment.
1352 For other symbols, we have no specified alignment, and
1353 we've printed the address; now print the size. */
1354 if (bfd_is_com_section (symbol
->section
))
1355 val
= ((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_value
;
1357 val
= ((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_size
;
1358 bfd_fprintf_vma (abfd
, file
, val
);
1360 /* If we have version information, print it. */
1361 if (elf_tdata (abfd
)->dynversym_section
!= 0
1362 && (elf_tdata (abfd
)->dynverdef_section
!= 0
1363 || elf_tdata (abfd
)->dynverref_section
!= 0))
1365 unsigned int vernum
;
1366 const char *version_string
;
1368 vernum
= ((elf_symbol_type
*) symbol
)->version
& VERSYM_VERSION
;
1371 version_string
= "";
1372 else if (vernum
== 1)
1373 version_string
= "Base";
1374 else if (vernum
<= elf_tdata (abfd
)->cverdefs
)
1376 elf_tdata (abfd
)->verdef
[vernum
- 1].vd_nodename
;
1379 Elf_Internal_Verneed
*t
;
1381 version_string
= "";
1382 for (t
= elf_tdata (abfd
)->verref
;
1386 Elf_Internal_Vernaux
*a
;
1388 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
1390 if (a
->vna_other
== vernum
)
1392 version_string
= a
->vna_nodename
;
1399 if ((((elf_symbol_type
*) symbol
)->version
& VERSYM_HIDDEN
) == 0)
1400 fprintf (file
, " %-11s", version_string
);
1405 fprintf (file
, " (%s)", version_string
);
1406 for (i
= 10 - strlen (version_string
); i
> 0; --i
)
1411 /* If the st_other field is not zero, print it. */
1412 st_other
= ((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_other
;
1417 case STV_INTERNAL
: fprintf (file
, " .internal"); break;
1418 case STV_HIDDEN
: fprintf (file
, " .hidden"); break;
1419 case STV_PROTECTED
: fprintf (file
, " .protected"); break;
1421 /* Some other non-defined flags are also present, so print
1423 fprintf (file
, " 0x%02x", (unsigned int) st_other
);
1426 fprintf (file
, " %s", name
);
1432 /* Create an entry in an ELF linker hash table. */
1434 struct bfd_hash_entry
*
1435 _bfd_elf_link_hash_newfunc (struct bfd_hash_entry
*entry
,
1436 struct bfd_hash_table
*table
,
1439 /* Allocate the structure if it has not already been allocated by a
1443 entry
= bfd_hash_allocate (table
, sizeof (struct elf_link_hash_entry
));
1448 /* Call the allocation method of the superclass. */
1449 entry
= _bfd_link_hash_newfunc (entry
, table
, string
);
1452 struct elf_link_hash_entry
*ret
= (struct elf_link_hash_entry
*) entry
;
1453 struct elf_link_hash_table
*htab
= (struct elf_link_hash_table
*) table
;
1455 /* Set local fields. */
1458 ret
->got
= htab
->init_got_refcount
;
1459 ret
->plt
= htab
->init_plt_refcount
;
1460 memset (&ret
->size
, 0, (sizeof (struct elf_link_hash_entry
)
1461 - offsetof (struct elf_link_hash_entry
, size
)));
1462 /* Assume that we have been called by a non-ELF symbol reader.
1463 This flag is then reset by the code which reads an ELF input
1464 file. This ensures that a symbol created by a non-ELF symbol
1465 reader will have the flag set correctly. */
1472 /* Copy data from an indirect symbol to its direct symbol, hiding the
1473 old indirect symbol. Also used for copying flags to a weakdef. */
1476 _bfd_elf_link_hash_copy_indirect (struct bfd_link_info
*info
,
1477 struct elf_link_hash_entry
*dir
,
1478 struct elf_link_hash_entry
*ind
)
1480 struct elf_link_hash_table
*htab
;
1482 /* Copy down any references that we may have already seen to the
1483 symbol which just became indirect. */
1485 dir
->ref_dynamic
|= ind
->ref_dynamic
;
1486 dir
->ref_regular
|= ind
->ref_regular
;
1487 dir
->ref_regular_nonweak
|= ind
->ref_regular_nonweak
;
1488 dir
->non_got_ref
|= ind
->non_got_ref
;
1489 dir
->needs_plt
|= ind
->needs_plt
;
1490 dir
->pointer_equality_needed
|= ind
->pointer_equality_needed
;
1492 if (ind
->root
.type
!= bfd_link_hash_indirect
)
1495 /* Copy over the global and procedure linkage table refcount entries.
1496 These may have been already set up by a check_relocs routine. */
1497 htab
= elf_hash_table (info
);
1498 if (ind
->got
.refcount
> htab
->init_got_refcount
.refcount
)
1500 if (dir
->got
.refcount
< 0)
1501 dir
->got
.refcount
= 0;
1502 dir
->got
.refcount
+= ind
->got
.refcount
;
1503 ind
->got
.refcount
= htab
->init_got_refcount
.refcount
;
1506 if (ind
->plt
.refcount
> htab
->init_plt_refcount
.refcount
)
1508 if (dir
->plt
.refcount
< 0)
1509 dir
->plt
.refcount
= 0;
1510 dir
->plt
.refcount
+= ind
->plt
.refcount
;
1511 ind
->plt
.refcount
= htab
->init_plt_refcount
.refcount
;
1514 if (ind
->dynindx
!= -1)
1516 if (dir
->dynindx
!= -1)
1517 _bfd_elf_strtab_delref (htab
->dynstr
, dir
->dynstr_index
);
1518 dir
->dynindx
= ind
->dynindx
;
1519 dir
->dynstr_index
= ind
->dynstr_index
;
1521 ind
->dynstr_index
= 0;
1526 _bfd_elf_link_hash_hide_symbol (struct bfd_link_info
*info
,
1527 struct elf_link_hash_entry
*h
,
1528 bfd_boolean force_local
)
1530 h
->plt
= elf_hash_table (info
)->init_plt_offset
;
1534 h
->forced_local
= 1;
1535 if (h
->dynindx
!= -1)
1538 _bfd_elf_strtab_delref (elf_hash_table (info
)->dynstr
,
1544 /* Initialize an ELF linker hash table. */
1547 _bfd_elf_link_hash_table_init
1548 (struct elf_link_hash_table
*table
,
1550 struct bfd_hash_entry
*(*newfunc
) (struct bfd_hash_entry
*,
1551 struct bfd_hash_table
*,
1555 int can_refcount
= get_elf_backend_data (abfd
)->can_refcount
;
1557 table
->dynamic_sections_created
= FALSE
;
1558 table
->dynobj
= NULL
;
1559 table
->init_got_refcount
.refcount
= can_refcount
- 1;
1560 table
->init_plt_refcount
.refcount
= can_refcount
- 1;
1561 table
->init_got_offset
.offset
= -(bfd_vma
) 1;
1562 table
->init_plt_offset
.offset
= -(bfd_vma
) 1;
1563 /* The first dynamic symbol is a dummy. */
1564 table
->dynsymcount
= 1;
1565 table
->dynstr
= NULL
;
1566 table
->bucketcount
= 0;
1567 table
->needed
= NULL
;
1569 table
->merge_info
= NULL
;
1570 memset (&table
->stab_info
, 0, sizeof (table
->stab_info
));
1571 memset (&table
->eh_info
, 0, sizeof (table
->eh_info
));
1572 table
->dynlocal
= NULL
;
1573 table
->runpath
= NULL
;
1574 table
->tls_sec
= NULL
;
1575 table
->tls_size
= 0;
1576 table
->loaded
= NULL
;
1577 table
->is_relocatable_executable
= FALSE
;
1579 ret
= _bfd_link_hash_table_init (&table
->root
, abfd
, newfunc
);
1580 table
->root
.type
= bfd_link_elf_hash_table
;
1585 /* Create an ELF linker hash table. */
1587 struct bfd_link_hash_table
*
1588 _bfd_elf_link_hash_table_create (bfd
*abfd
)
1590 struct elf_link_hash_table
*ret
;
1591 bfd_size_type amt
= sizeof (struct elf_link_hash_table
);
1593 ret
= bfd_malloc (amt
);
1597 if (! _bfd_elf_link_hash_table_init (ret
, abfd
, _bfd_elf_link_hash_newfunc
))
1606 /* This is a hook for the ELF emulation code in the generic linker to
1607 tell the backend linker what file name to use for the DT_NEEDED
1608 entry for a dynamic object. */
1611 bfd_elf_set_dt_needed_name (bfd
*abfd
, const char *name
)
1613 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1614 && bfd_get_format (abfd
) == bfd_object
)
1615 elf_dt_name (abfd
) = name
;
1619 bfd_elf_get_dyn_lib_class (bfd
*abfd
)
1622 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1623 && bfd_get_format (abfd
) == bfd_object
)
1624 lib_class
= elf_dyn_lib_class (abfd
);
1631 bfd_elf_set_dyn_lib_class (bfd
*abfd
, int lib_class
)
1633 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1634 && bfd_get_format (abfd
) == bfd_object
)
1635 elf_dyn_lib_class (abfd
) = lib_class
;
1638 /* Get the list of DT_NEEDED entries for a link. This is a hook for
1639 the linker ELF emulation code. */
1641 struct bfd_link_needed_list
*
1642 bfd_elf_get_needed_list (bfd
*abfd ATTRIBUTE_UNUSED
,
1643 struct bfd_link_info
*info
)
1645 if (! is_elf_hash_table (info
->hash
))
1647 return elf_hash_table (info
)->needed
;
1650 /* Get the list of DT_RPATH/DT_RUNPATH entries for a link. This is a
1651 hook for the linker ELF emulation code. */
1653 struct bfd_link_needed_list
*
1654 bfd_elf_get_runpath_list (bfd
*abfd ATTRIBUTE_UNUSED
,
1655 struct bfd_link_info
*info
)
1657 if (! is_elf_hash_table (info
->hash
))
1659 return elf_hash_table (info
)->runpath
;
1662 /* Get the name actually used for a dynamic object for a link. This
1663 is the SONAME entry if there is one. Otherwise, it is the string
1664 passed to bfd_elf_set_dt_needed_name, or it is the filename. */
1667 bfd_elf_get_dt_soname (bfd
*abfd
)
1669 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1670 && bfd_get_format (abfd
) == bfd_object
)
1671 return elf_dt_name (abfd
);
1675 /* Get the list of DT_NEEDED entries from a BFD. This is a hook for
1676 the ELF linker emulation code. */
1679 bfd_elf_get_bfd_needed_list (bfd
*abfd
,
1680 struct bfd_link_needed_list
**pneeded
)
1683 bfd_byte
*dynbuf
= NULL
;
1685 unsigned long shlink
;
1686 bfd_byte
*extdyn
, *extdynend
;
1688 void (*swap_dyn_in
) (bfd
*, const void *, Elf_Internal_Dyn
*);
1692 if (bfd_get_flavour (abfd
) != bfd_target_elf_flavour
1693 || bfd_get_format (abfd
) != bfd_object
)
1696 s
= bfd_get_section_by_name (abfd
, ".dynamic");
1697 if (s
== NULL
|| s
->size
== 0)
1700 if (!bfd_malloc_and_get_section (abfd
, s
, &dynbuf
))
1703 elfsec
= _bfd_elf_section_from_bfd_section (abfd
, s
);
1707 shlink
= elf_elfsections (abfd
)[elfsec
]->sh_link
;
1709 extdynsize
= get_elf_backend_data (abfd
)->s
->sizeof_dyn
;
1710 swap_dyn_in
= get_elf_backend_data (abfd
)->s
->swap_dyn_in
;
1713 extdynend
= extdyn
+ s
->size
;
1714 for (; extdyn
< extdynend
; extdyn
+= extdynsize
)
1716 Elf_Internal_Dyn dyn
;
1718 (*swap_dyn_in
) (abfd
, extdyn
, &dyn
);
1720 if (dyn
.d_tag
== DT_NULL
)
1723 if (dyn
.d_tag
== DT_NEEDED
)
1726 struct bfd_link_needed_list
*l
;
1727 unsigned int tagv
= dyn
.d_un
.d_val
;
1730 string
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
1735 l
= bfd_alloc (abfd
, amt
);
1756 /* Allocate an ELF string table--force the first byte to be zero. */
1758 struct bfd_strtab_hash
*
1759 _bfd_elf_stringtab_init (void)
1761 struct bfd_strtab_hash
*ret
;
1763 ret
= _bfd_stringtab_init ();
1768 loc
= _bfd_stringtab_add (ret
, "", TRUE
, FALSE
);
1769 BFD_ASSERT (loc
== 0 || loc
== (bfd_size_type
) -1);
1770 if (loc
== (bfd_size_type
) -1)
1772 _bfd_stringtab_free (ret
);
1779 /* ELF .o/exec file reading */
1781 /* Create a new bfd section from an ELF section header. */
1784 bfd_section_from_shdr (bfd
*abfd
, unsigned int shindex
)
1786 Elf_Internal_Shdr
*hdr
= elf_elfsections (abfd
)[shindex
];
1787 Elf_Internal_Ehdr
*ehdr
= elf_elfheader (abfd
);
1788 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
1791 name
= bfd_elf_string_from_elf_section (abfd
,
1792 elf_elfheader (abfd
)->e_shstrndx
,
1797 switch (hdr
->sh_type
)
1800 /* Inactive section. Throw it away. */
1803 case SHT_PROGBITS
: /* Normal section with contents. */
1804 case SHT_NOBITS
: /* .bss section. */
1805 case SHT_HASH
: /* .hash section. */
1806 case SHT_NOTE
: /* .note section. */
1807 case SHT_INIT_ARRAY
: /* .init_array section. */
1808 case SHT_FINI_ARRAY
: /* .fini_array section. */
1809 case SHT_PREINIT_ARRAY
: /* .preinit_array section. */
1810 case SHT_GNU_LIBLIST
: /* .gnu.liblist section. */
1811 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
);
1813 case SHT_DYNAMIC
: /* Dynamic linking information. */
1814 if (! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
))
1816 if (hdr
->sh_link
> elf_numsections (abfd
)
1817 || elf_elfsections (abfd
)[hdr
->sh_link
] == NULL
)
1819 if (elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_STRTAB
)
1821 Elf_Internal_Shdr
*dynsymhdr
;
1823 /* The shared libraries distributed with hpux11 have a bogus
1824 sh_link field for the ".dynamic" section. Find the
1825 string table for the ".dynsym" section instead. */
1826 if (elf_dynsymtab (abfd
) != 0)
1828 dynsymhdr
= elf_elfsections (abfd
)[elf_dynsymtab (abfd
)];
1829 hdr
->sh_link
= dynsymhdr
->sh_link
;
1833 unsigned int i
, num_sec
;
1835 num_sec
= elf_numsections (abfd
);
1836 for (i
= 1; i
< num_sec
; i
++)
1838 dynsymhdr
= elf_elfsections (abfd
)[i
];
1839 if (dynsymhdr
->sh_type
== SHT_DYNSYM
)
1841 hdr
->sh_link
= dynsymhdr
->sh_link
;
1849 case SHT_SYMTAB
: /* A symbol table */
1850 if (elf_onesymtab (abfd
) == shindex
)
1853 if (hdr
->sh_entsize
!= bed
->s
->sizeof_sym
)
1855 BFD_ASSERT (elf_onesymtab (abfd
) == 0);
1856 elf_onesymtab (abfd
) = shindex
;
1857 elf_tdata (abfd
)->symtab_hdr
= *hdr
;
1858 elf_elfsections (abfd
)[shindex
] = hdr
= &elf_tdata (abfd
)->symtab_hdr
;
1859 abfd
->flags
|= HAS_SYMS
;
1861 /* Sometimes a shared object will map in the symbol table. If
1862 SHF_ALLOC is set, and this is a shared object, then we also
1863 treat this section as a BFD section. We can not base the
1864 decision purely on SHF_ALLOC, because that flag is sometimes
1865 set in a relocatable object file, which would confuse the
1867 if ((hdr
->sh_flags
& SHF_ALLOC
) != 0
1868 && (abfd
->flags
& DYNAMIC
) != 0
1869 && ! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
,
1873 /* Go looking for SHT_SYMTAB_SHNDX too, since if there is one we
1874 can't read symbols without that section loaded as well. It
1875 is most likely specified by the next section header. */
1876 if (elf_elfsections (abfd
)[elf_symtab_shndx (abfd
)]->sh_link
!= shindex
)
1878 unsigned int i
, num_sec
;
1880 num_sec
= elf_numsections (abfd
);
1881 for (i
= shindex
+ 1; i
< num_sec
; i
++)
1883 Elf_Internal_Shdr
*hdr2
= elf_elfsections (abfd
)[i
];
1884 if (hdr2
->sh_type
== SHT_SYMTAB_SHNDX
1885 && hdr2
->sh_link
== shindex
)
1889 for (i
= 1; i
< shindex
; i
++)
1891 Elf_Internal_Shdr
*hdr2
= elf_elfsections (abfd
)[i
];
1892 if (hdr2
->sh_type
== SHT_SYMTAB_SHNDX
1893 && hdr2
->sh_link
== shindex
)
1897 return bfd_section_from_shdr (abfd
, i
);
1901 case SHT_DYNSYM
: /* A dynamic symbol table */
1902 if (elf_dynsymtab (abfd
) == shindex
)
1905 if (hdr
->sh_entsize
!= bed
->s
->sizeof_sym
)
1907 BFD_ASSERT (elf_dynsymtab (abfd
) == 0);
1908 elf_dynsymtab (abfd
) = shindex
;
1909 elf_tdata (abfd
)->dynsymtab_hdr
= *hdr
;
1910 elf_elfsections (abfd
)[shindex
] = hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
1911 abfd
->flags
|= HAS_SYMS
;
1913 /* Besides being a symbol table, we also treat this as a regular
1914 section, so that objcopy can handle it. */
1915 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
);
1917 case SHT_SYMTAB_SHNDX
: /* Symbol section indices when >64k sections */
1918 if (elf_symtab_shndx (abfd
) == shindex
)
1921 BFD_ASSERT (elf_symtab_shndx (abfd
) == 0);
1922 elf_symtab_shndx (abfd
) = shindex
;
1923 elf_tdata (abfd
)->symtab_shndx_hdr
= *hdr
;
1924 elf_elfsections (abfd
)[shindex
] = &elf_tdata (abfd
)->symtab_shndx_hdr
;
1927 case SHT_STRTAB
: /* A string table */
1928 if (hdr
->bfd_section
!= NULL
)
1930 if (ehdr
->e_shstrndx
== shindex
)
1932 elf_tdata (abfd
)->shstrtab_hdr
= *hdr
;
1933 elf_elfsections (abfd
)[shindex
] = &elf_tdata (abfd
)->shstrtab_hdr
;
1936 if (elf_elfsections (abfd
)[elf_onesymtab (abfd
)]->sh_link
== shindex
)
1939 elf_tdata (abfd
)->strtab_hdr
= *hdr
;
1940 elf_elfsections (abfd
)[shindex
] = &elf_tdata (abfd
)->strtab_hdr
;
1943 if (elf_elfsections (abfd
)[elf_dynsymtab (abfd
)]->sh_link
== shindex
)
1946 elf_tdata (abfd
)->dynstrtab_hdr
= *hdr
;
1947 hdr
= &elf_tdata (abfd
)->dynstrtab_hdr
;
1948 elf_elfsections (abfd
)[shindex
] = hdr
;
1949 /* We also treat this as a regular section, so that objcopy
1951 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
,
1955 /* If the string table isn't one of the above, then treat it as a
1956 regular section. We need to scan all the headers to be sure,
1957 just in case this strtab section appeared before the above. */
1958 if (elf_onesymtab (abfd
) == 0 || elf_dynsymtab (abfd
) == 0)
1960 unsigned int i
, num_sec
;
1962 num_sec
= elf_numsections (abfd
);
1963 for (i
= 1; i
< num_sec
; i
++)
1965 Elf_Internal_Shdr
*hdr2
= elf_elfsections (abfd
)[i
];
1966 if (hdr2
->sh_link
== shindex
)
1968 /* Prevent endless recursion on broken objects. */
1971 if (! bfd_section_from_shdr (abfd
, i
))
1973 if (elf_onesymtab (abfd
) == i
)
1975 if (elf_dynsymtab (abfd
) == i
)
1976 goto dynsymtab_strtab
;
1980 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
);
1984 /* *These* do a lot of work -- but build no sections! */
1986 asection
*target_sect
;
1987 Elf_Internal_Shdr
*hdr2
;
1988 unsigned int num_sec
= elf_numsections (abfd
);
1991 != (bfd_size_type
) (hdr
->sh_type
== SHT_REL
1992 ? bed
->s
->sizeof_rel
: bed
->s
->sizeof_rela
))
1995 /* Check for a bogus link to avoid crashing. */
1996 if ((hdr
->sh_link
>= SHN_LORESERVE
&& hdr
->sh_link
<= SHN_HIRESERVE
)
1997 || hdr
->sh_link
>= num_sec
)
1999 ((*_bfd_error_handler
)
2000 (_("%B: invalid link %lu for reloc section %s (index %u)"),
2001 abfd
, hdr
->sh_link
, name
, shindex
));
2002 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
,
2006 /* For some incomprehensible reason Oracle distributes
2007 libraries for Solaris in which some of the objects have
2008 bogus sh_link fields. It would be nice if we could just
2009 reject them, but, unfortunately, some people need to use
2010 them. We scan through the section headers; if we find only
2011 one suitable symbol table, we clobber the sh_link to point
2012 to it. I hope this doesn't break anything. */
2013 if (elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_SYMTAB
2014 && elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_DYNSYM
)
2020 for (scan
= 1; scan
< num_sec
; scan
++)
2022 if (elf_elfsections (abfd
)[scan
]->sh_type
== SHT_SYMTAB
2023 || elf_elfsections (abfd
)[scan
]->sh_type
== SHT_DYNSYM
)
2034 hdr
->sh_link
= found
;
2037 /* Get the symbol table. */
2038 if ((elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
== SHT_SYMTAB
2039 || elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
== SHT_DYNSYM
)
2040 && ! bfd_section_from_shdr (abfd
, hdr
->sh_link
))
2043 /* If this reloc section does not use the main symbol table we
2044 don't treat it as a reloc section. BFD can't adequately
2045 represent such a section, so at least for now, we don't
2046 try. We just present it as a normal section. We also
2047 can't use it as a reloc section if it points to the null
2049 if (hdr
->sh_link
!= elf_onesymtab (abfd
) || hdr
->sh_info
== SHN_UNDEF
)
2050 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
,
2053 /* Prevent endless recursion on broken objects. */
2054 if (elf_elfsections (abfd
)[hdr
->sh_info
]->sh_type
== SHT_REL
2055 || elf_elfsections (abfd
)[hdr
->sh_info
]->sh_type
== SHT_RELA
)
2057 if (! bfd_section_from_shdr (abfd
, hdr
->sh_info
))
2059 target_sect
= bfd_section_from_elf_index (abfd
, hdr
->sh_info
);
2060 if (target_sect
== NULL
)
2063 if ((target_sect
->flags
& SEC_RELOC
) == 0
2064 || target_sect
->reloc_count
== 0)
2065 hdr2
= &elf_section_data (target_sect
)->rel_hdr
;
2069 BFD_ASSERT (elf_section_data (target_sect
)->rel_hdr2
== NULL
);
2070 amt
= sizeof (*hdr2
);
2071 hdr2
= bfd_alloc (abfd
, amt
);
2072 elf_section_data (target_sect
)->rel_hdr2
= hdr2
;
2075 elf_elfsections (abfd
)[shindex
] = hdr2
;
2076 target_sect
->reloc_count
+= NUM_SHDR_ENTRIES (hdr
);
2077 target_sect
->flags
|= SEC_RELOC
;
2078 target_sect
->relocation
= NULL
;
2079 target_sect
->rel_filepos
= hdr
->sh_offset
;
2080 /* In the section to which the relocations apply, mark whether
2081 its relocations are of the REL or RELA variety. */
2082 if (hdr
->sh_size
!= 0)
2083 target_sect
->use_rela_p
= hdr
->sh_type
== SHT_RELA
;
2084 abfd
->flags
|= HAS_RELOC
;
2089 case SHT_GNU_verdef
:
2090 elf_dynverdef (abfd
) = shindex
;
2091 elf_tdata (abfd
)->dynverdef_hdr
= *hdr
;
2092 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
);
2095 case SHT_GNU_versym
:
2096 if (hdr
->sh_entsize
!= sizeof (Elf_External_Versym
))
2098 elf_dynversym (abfd
) = shindex
;
2099 elf_tdata (abfd
)->dynversym_hdr
= *hdr
;
2100 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
);
2103 case SHT_GNU_verneed
:
2104 elf_dynverref (abfd
) = shindex
;
2105 elf_tdata (abfd
)->dynverref_hdr
= *hdr
;
2106 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
);
2113 /* We need a BFD section for objcopy and relocatable linking,
2114 and it's handy to have the signature available as the section
2116 if (hdr
->sh_entsize
!= GRP_ENTRY_SIZE
)
2118 name
= group_signature (abfd
, hdr
);
2121 if (!_bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
))
2123 if (hdr
->contents
!= NULL
)
2125 Elf_Internal_Group
*idx
= (Elf_Internal_Group
*) hdr
->contents
;
2126 unsigned int n_elt
= hdr
->sh_size
/ 4;
2129 if (idx
->flags
& GRP_COMDAT
)
2130 hdr
->bfd_section
->flags
2131 |= SEC_LINK_ONCE
| SEC_LINK_DUPLICATES_DISCARD
;
2133 /* We try to keep the same section order as it comes in. */
2135 while (--n_elt
!= 0)
2136 if ((s
= (--idx
)->shdr
->bfd_section
) != NULL
2137 && elf_next_in_group (s
) != NULL
)
2139 elf_next_in_group (hdr
->bfd_section
) = s
;
2146 /* Check for any processor-specific section types. */
2147 return bed
->elf_backend_section_from_shdr (abfd
, hdr
, name
,
2154 /* Return the section for the local symbol specified by ABFD, R_SYMNDX.
2155 Return SEC for sections that have no elf section, and NULL on error. */
2158 bfd_section_from_r_symndx (bfd
*abfd
,
2159 struct sym_sec_cache
*cache
,
2161 unsigned long r_symndx
)
2163 Elf_Internal_Shdr
*symtab_hdr
;
2164 unsigned char esym
[sizeof (Elf64_External_Sym
)];
2165 Elf_External_Sym_Shndx eshndx
;
2166 Elf_Internal_Sym isym
;
2167 unsigned int ent
= r_symndx
% LOCAL_SYM_CACHE_SIZE
;
2169 if (cache
->abfd
== abfd
&& cache
->indx
[ent
] == r_symndx
)
2170 return cache
->sec
[ent
];
2172 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2173 if (bfd_elf_get_elf_syms (abfd
, symtab_hdr
, 1, r_symndx
,
2174 &isym
, esym
, &eshndx
) == NULL
)
2177 if (cache
->abfd
!= abfd
)
2179 memset (cache
->indx
, -1, sizeof (cache
->indx
));
2182 cache
->indx
[ent
] = r_symndx
;
2183 cache
->sec
[ent
] = sec
;
2184 if ((isym
.st_shndx
!= SHN_UNDEF
&& isym
.st_shndx
< SHN_LORESERVE
)
2185 || isym
.st_shndx
> SHN_HIRESERVE
)
2188 s
= bfd_section_from_elf_index (abfd
, isym
.st_shndx
);
2190 cache
->sec
[ent
] = s
;
2192 return cache
->sec
[ent
];
2195 /* Given an ELF section number, retrieve the corresponding BFD
2199 bfd_section_from_elf_index (bfd
*abfd
, unsigned int index
)
2201 if (index
>= elf_numsections (abfd
))
2203 return elf_elfsections (abfd
)[index
]->bfd_section
;
2206 static const struct bfd_elf_special_section special_sections_b
[] =
2208 { ".bss", 4, -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
},
2209 { NULL
, 0, 0, 0, 0 }
2212 static const struct bfd_elf_special_section special_sections_c
[] =
2214 { ".comment", 8, 0, SHT_PROGBITS
, 0 },
2215 { NULL
, 0, 0, 0, 0 }
2218 static const struct bfd_elf_special_section special_sections_d
[] =
2220 { ".data", 5, -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
},
2221 { ".data1", 6, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
},
2222 { ".debug", 6, 0, SHT_PROGBITS
, 0 },
2223 { ".debug_line", 11, 0, SHT_PROGBITS
, 0 },
2224 { ".debug_info", 11, 0, SHT_PROGBITS
, 0 },
2225 { ".debug_abbrev", 13, 0, SHT_PROGBITS
, 0 },
2226 { ".debug_aranges", 14, 0, SHT_PROGBITS
, 0 },
2227 { ".dynamic", 8, 0, SHT_DYNAMIC
, SHF_ALLOC
},
2228 { ".dynstr", 7, 0, SHT_STRTAB
, SHF_ALLOC
},
2229 { ".dynsym", 7, 0, SHT_DYNSYM
, SHF_ALLOC
},
2230 { NULL
, 0, 0, 0, 0 }
2233 static const struct bfd_elf_special_section special_sections_f
[] =
2235 { ".fini", 5, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
},
2236 { ".fini_array", 11, 0, SHT_FINI_ARRAY
, SHF_ALLOC
+ SHF_WRITE
},
2237 { NULL
, 0, 0, 0, 0 }
2240 static const struct bfd_elf_special_section special_sections_g
[] =
2242 { ".gnu.linkonce.b",15, -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
},
2243 { ".got", 4, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
},
2244 { ".gnu.version", 12, 0, SHT_GNU_versym
, 0 },
2245 { ".gnu.version_d", 14, 0, SHT_GNU_verdef
, 0 },
2246 { ".gnu.version_r", 14, 0, SHT_GNU_verneed
, 0 },
2247 { ".gnu.liblist", 12, 0, SHT_GNU_LIBLIST
, SHF_ALLOC
},
2248 { ".gnu.conflict", 13, 0, SHT_RELA
, SHF_ALLOC
},
2249 { NULL
, 0, 0, 0, 0 }
2252 static const struct bfd_elf_special_section special_sections_h
[] =
2254 { ".hash", 5, 0, SHT_HASH
, SHF_ALLOC
},
2255 { NULL
, 0, 0, 0, 0 }
2258 static const struct bfd_elf_special_section special_sections_i
[] =
2260 { ".init", 5, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
},
2261 { ".init_array", 11, 0, SHT_INIT_ARRAY
, SHF_ALLOC
+ SHF_WRITE
},
2262 { ".interp", 7, 0, SHT_PROGBITS
, 0 },
2263 { NULL
, 0, 0, 0, 0 }
2266 static const struct bfd_elf_special_section special_sections_l
[] =
2268 { ".line", 5, 0, SHT_PROGBITS
, 0 },
2269 { NULL
, 0, 0, 0, 0 }
2272 static const struct bfd_elf_special_section special_sections_n
[] =
2274 { ".note.GNU-stack",15, 0, SHT_PROGBITS
, 0 },
2275 { ".note", 5, -1, SHT_NOTE
, 0 },
2276 { NULL
, 0, 0, 0, 0 }
2279 static const struct bfd_elf_special_section special_sections_p
[] =
2281 { ".preinit_array", 14, 0, SHT_PREINIT_ARRAY
, SHF_ALLOC
+ SHF_WRITE
},
2282 { ".plt", 4, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
},
2283 { NULL
, 0, 0, 0, 0 }
2286 static const struct bfd_elf_special_section special_sections_r
[] =
2288 { ".rodata", 7, -2, SHT_PROGBITS
, SHF_ALLOC
},
2289 { ".rodata1", 8, 0, SHT_PROGBITS
, SHF_ALLOC
},
2290 { ".rela", 5, -1, SHT_RELA
, 0 },
2291 { ".rel", 4, -1, SHT_REL
, 0 },
2292 { NULL
, 0, 0, 0, 0 }
2295 static const struct bfd_elf_special_section special_sections_s
[] =
2297 { ".shstrtab", 9, 0, SHT_STRTAB
, 0 },
2298 { ".strtab", 7, 0, SHT_STRTAB
, 0 },
2299 { ".symtab", 7, 0, SHT_SYMTAB
, 0 },
2300 { ".stabstr", 5, 3, SHT_STRTAB
, 0 },
2301 { NULL
, 0, 0, 0, 0 }
2304 static const struct bfd_elf_special_section special_sections_t
[] =
2306 { ".text", 5, -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
},
2307 { ".tbss", 5, -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_TLS
},
2308 { ".tdata", 6, -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_TLS
},
2309 { NULL
, 0, 0, 0, 0 }
2312 static const struct bfd_elf_special_section
*special_sections
[] =
2314 special_sections_b
, /* 'b' */
2315 special_sections_c
, /* 'b' */
2316 special_sections_d
, /* 'd' */
2318 special_sections_f
, /* 'f' */
2319 special_sections_g
, /* 'g' */
2320 special_sections_h
, /* 'h' */
2321 special_sections_i
, /* 'i' */
2324 special_sections_l
, /* 'l' */
2326 special_sections_n
, /* 'n' */
2328 special_sections_p
, /* 'p' */
2330 special_sections_r
, /* 'r' */
2331 special_sections_s
, /* 's' */
2332 special_sections_t
, /* 't' */
2335 const struct bfd_elf_special_section
*
2336 _bfd_elf_get_special_section (const char *name
,
2337 const struct bfd_elf_special_section
*spec
,
2343 len
= strlen (name
);
2345 for (i
= 0; spec
[i
].prefix
!= NULL
; i
++)
2348 int prefix_len
= spec
[i
].prefix_length
;
2350 if (len
< prefix_len
)
2352 if (memcmp (name
, spec
[i
].prefix
, prefix_len
) != 0)
2355 suffix_len
= spec
[i
].suffix_length
;
2356 if (suffix_len
<= 0)
2358 if (name
[prefix_len
] != 0)
2360 if (suffix_len
== 0)
2362 if (name
[prefix_len
] != '.'
2363 && (suffix_len
== -2
2364 || (rela
&& spec
[i
].type
== SHT_REL
)))
2370 if (len
< prefix_len
+ suffix_len
)
2372 if (memcmp (name
+ len
- suffix_len
,
2373 spec
[i
].prefix
+ prefix_len
,
2383 const struct bfd_elf_special_section
*
2384 _bfd_elf_get_sec_type_attr (bfd
*abfd
, asection
*sec
)
2387 const struct bfd_elf_special_section
*spec
;
2388 const struct elf_backend_data
*bed
;
2390 /* See if this is one of the special sections. */
2391 if (sec
->name
== NULL
)
2394 bed
= get_elf_backend_data (abfd
);
2395 spec
= bed
->special_sections
;
2398 spec
= _bfd_elf_get_special_section (sec
->name
,
2399 bed
->special_sections
,
2405 if (sec
->name
[0] != '.')
2408 i
= sec
->name
[1] - 'b';
2409 if (i
< 0 || i
> 't' - 'b')
2412 spec
= special_sections
[i
];
2417 return _bfd_elf_get_special_section (sec
->name
, spec
, sec
->use_rela_p
);
2421 _bfd_elf_new_section_hook (bfd
*abfd
, asection
*sec
)
2423 struct bfd_elf_section_data
*sdata
;
2424 const struct elf_backend_data
*bed
;
2425 const struct bfd_elf_special_section
*ssect
;
2427 sdata
= (struct bfd_elf_section_data
*) sec
->used_by_bfd
;
2430 sdata
= bfd_zalloc (abfd
, sizeof (*sdata
));
2433 sec
->used_by_bfd
= sdata
;
2436 /* Indicate whether or not this section should use RELA relocations. */
2437 bed
= get_elf_backend_data (abfd
);
2438 sec
->use_rela_p
= bed
->default_use_rela_p
;
2440 /* When we read a file, we don't need section type and flags unless
2441 it is a linker created section. They will be overridden in
2442 _bfd_elf_make_section_from_shdr anyway. */
2443 if (abfd
->direction
!= read_direction
2444 || (sec
->flags
& SEC_LINKER_CREATED
) != 0)
2446 ssect
= (*bed
->get_sec_type_attr
) (abfd
, sec
);
2449 elf_section_type (sec
) = ssect
->type
;
2450 elf_section_flags (sec
) = ssect
->attr
;
2457 /* Create a new bfd section from an ELF program header.
2459 Since program segments have no names, we generate a synthetic name
2460 of the form segment<NUM>, where NUM is generally the index in the
2461 program header table. For segments that are split (see below) we
2462 generate the names segment<NUM>a and segment<NUM>b.
2464 Note that some program segments may have a file size that is different than
2465 (less than) the memory size. All this means is that at execution the
2466 system must allocate the amount of memory specified by the memory size,
2467 but only initialize it with the first "file size" bytes read from the
2468 file. This would occur for example, with program segments consisting
2469 of combined data+bss.
2471 To handle the above situation, this routine generates TWO bfd sections
2472 for the single program segment. The first has the length specified by
2473 the file size of the segment, and the second has the length specified
2474 by the difference between the two sizes. In effect, the segment is split
2475 into it's initialized and uninitialized parts.
2480 _bfd_elf_make_section_from_phdr (bfd
*abfd
,
2481 Elf_Internal_Phdr
*hdr
,
2483 const char *typename
)
2491 split
= ((hdr
->p_memsz
> 0)
2492 && (hdr
->p_filesz
> 0)
2493 && (hdr
->p_memsz
> hdr
->p_filesz
));
2494 sprintf (namebuf
, "%s%d%s", typename
, index
, split
? "a" : "");
2495 len
= strlen (namebuf
) + 1;
2496 name
= bfd_alloc (abfd
, len
);
2499 memcpy (name
, namebuf
, len
);
2500 newsect
= bfd_make_section (abfd
, name
);
2501 if (newsect
== NULL
)
2503 newsect
->vma
= hdr
->p_vaddr
;
2504 newsect
->lma
= hdr
->p_paddr
;
2505 newsect
->size
= hdr
->p_filesz
;
2506 newsect
->filepos
= hdr
->p_offset
;
2507 newsect
->flags
|= SEC_HAS_CONTENTS
;
2508 newsect
->alignment_power
= bfd_log2 (hdr
->p_align
);
2509 if (hdr
->p_type
== PT_LOAD
)
2511 newsect
->flags
|= SEC_ALLOC
;
2512 newsect
->flags
|= SEC_LOAD
;
2513 if (hdr
->p_flags
& PF_X
)
2515 /* FIXME: all we known is that it has execute PERMISSION,
2517 newsect
->flags
|= SEC_CODE
;
2520 if (!(hdr
->p_flags
& PF_W
))
2522 newsect
->flags
|= SEC_READONLY
;
2527 sprintf (namebuf
, "%s%db", typename
, index
);
2528 len
= strlen (namebuf
) + 1;
2529 name
= bfd_alloc (abfd
, len
);
2532 memcpy (name
, namebuf
, len
);
2533 newsect
= bfd_make_section (abfd
, name
);
2534 if (newsect
== NULL
)
2536 newsect
->vma
= hdr
->p_vaddr
+ hdr
->p_filesz
;
2537 newsect
->lma
= hdr
->p_paddr
+ hdr
->p_filesz
;
2538 newsect
->size
= hdr
->p_memsz
- hdr
->p_filesz
;
2539 if (hdr
->p_type
== PT_LOAD
)
2541 newsect
->flags
|= SEC_ALLOC
;
2542 if (hdr
->p_flags
& PF_X
)
2543 newsect
->flags
|= SEC_CODE
;
2545 if (!(hdr
->p_flags
& PF_W
))
2546 newsect
->flags
|= SEC_READONLY
;
2553 bfd_section_from_phdr (bfd
*abfd
, Elf_Internal_Phdr
*hdr
, int index
)
2555 const struct elf_backend_data
*bed
;
2557 switch (hdr
->p_type
)
2560 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "null");
2563 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "load");
2566 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "dynamic");
2569 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "interp");
2572 if (! _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "note"))
2574 if (! elfcore_read_notes (abfd
, hdr
->p_offset
, hdr
->p_filesz
))
2579 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "shlib");
2582 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "phdr");
2584 case PT_GNU_EH_FRAME
:
2585 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
,
2589 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "stack");
2592 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "relro");
2595 /* Check for any processor-specific program segment types. */
2596 bed
= get_elf_backend_data (abfd
);
2597 return bed
->elf_backend_section_from_phdr (abfd
, hdr
, index
, "proc");
2601 /* Initialize REL_HDR, the section-header for new section, containing
2602 relocations against ASECT. If USE_RELA_P is TRUE, we use RELA
2603 relocations; otherwise, we use REL relocations. */
2606 _bfd_elf_init_reloc_shdr (bfd
*abfd
,
2607 Elf_Internal_Shdr
*rel_hdr
,
2609 bfd_boolean use_rela_p
)
2612 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2613 bfd_size_type amt
= sizeof ".rela" + strlen (asect
->name
);
2615 name
= bfd_alloc (abfd
, amt
);
2618 sprintf (name
, "%s%s", use_rela_p
? ".rela" : ".rel", asect
->name
);
2620 (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd
), name
,
2622 if (rel_hdr
->sh_name
== (unsigned int) -1)
2624 rel_hdr
->sh_type
= use_rela_p
? SHT_RELA
: SHT_REL
;
2625 rel_hdr
->sh_entsize
= (use_rela_p
2626 ? bed
->s
->sizeof_rela
2627 : bed
->s
->sizeof_rel
);
2628 rel_hdr
->sh_addralign
= 1 << bed
->s
->log_file_align
;
2629 rel_hdr
->sh_flags
= 0;
2630 rel_hdr
->sh_addr
= 0;
2631 rel_hdr
->sh_size
= 0;
2632 rel_hdr
->sh_offset
= 0;
2637 /* Set up an ELF internal section header for a section. */
2640 elf_fake_sections (bfd
*abfd
, asection
*asect
, void *failedptrarg
)
2642 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2643 bfd_boolean
*failedptr
= failedptrarg
;
2644 Elf_Internal_Shdr
*this_hdr
;
2648 /* We already failed; just get out of the bfd_map_over_sections
2653 this_hdr
= &elf_section_data (asect
)->this_hdr
;
2655 this_hdr
->sh_name
= (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd
),
2656 asect
->name
, FALSE
);
2657 if (this_hdr
->sh_name
== (unsigned int) -1)
2663 /* Don't clear sh_flags. Assembler may set additional bits. */
2665 if ((asect
->flags
& SEC_ALLOC
) != 0
2666 || asect
->user_set_vma
)
2667 this_hdr
->sh_addr
= asect
->vma
;
2669 this_hdr
->sh_addr
= 0;
2671 this_hdr
->sh_offset
= 0;
2672 this_hdr
->sh_size
= asect
->size
;
2673 this_hdr
->sh_link
= 0;
2674 this_hdr
->sh_addralign
= 1 << asect
->alignment_power
;
2675 /* The sh_entsize and sh_info fields may have been set already by
2676 copy_private_section_data. */
2678 this_hdr
->bfd_section
= asect
;
2679 this_hdr
->contents
= NULL
;
2681 /* If the section type is unspecified, we set it based on
2683 if (this_hdr
->sh_type
== SHT_NULL
)
2685 if ((asect
->flags
& SEC_GROUP
) != 0)
2686 this_hdr
->sh_type
= SHT_GROUP
;
2687 else if ((asect
->flags
& SEC_ALLOC
) != 0
2688 && (((asect
->flags
& (SEC_LOAD
| SEC_HAS_CONTENTS
)) == 0)
2689 || (asect
->flags
& SEC_NEVER_LOAD
) != 0))
2690 this_hdr
->sh_type
= SHT_NOBITS
;
2692 this_hdr
->sh_type
= SHT_PROGBITS
;
2695 switch (this_hdr
->sh_type
)
2701 case SHT_INIT_ARRAY
:
2702 case SHT_FINI_ARRAY
:
2703 case SHT_PREINIT_ARRAY
:
2710 this_hdr
->sh_entsize
= bed
->s
->sizeof_hash_entry
;
2714 this_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
2718 this_hdr
->sh_entsize
= bed
->s
->sizeof_dyn
;
2722 if (get_elf_backend_data (abfd
)->may_use_rela_p
)
2723 this_hdr
->sh_entsize
= bed
->s
->sizeof_rela
;
2727 if (get_elf_backend_data (abfd
)->may_use_rel_p
)
2728 this_hdr
->sh_entsize
= bed
->s
->sizeof_rel
;
2731 case SHT_GNU_versym
:
2732 this_hdr
->sh_entsize
= sizeof (Elf_External_Versym
);
2735 case SHT_GNU_verdef
:
2736 this_hdr
->sh_entsize
= 0;
2737 /* objcopy or strip will copy over sh_info, but may not set
2738 cverdefs. The linker will set cverdefs, but sh_info will be
2740 if (this_hdr
->sh_info
== 0)
2741 this_hdr
->sh_info
= elf_tdata (abfd
)->cverdefs
;
2743 BFD_ASSERT (elf_tdata (abfd
)->cverdefs
== 0
2744 || this_hdr
->sh_info
== elf_tdata (abfd
)->cverdefs
);
2747 case SHT_GNU_verneed
:
2748 this_hdr
->sh_entsize
= 0;
2749 /* objcopy or strip will copy over sh_info, but may not set
2750 cverrefs. The linker will set cverrefs, but sh_info will be
2752 if (this_hdr
->sh_info
== 0)
2753 this_hdr
->sh_info
= elf_tdata (abfd
)->cverrefs
;
2755 BFD_ASSERT (elf_tdata (abfd
)->cverrefs
== 0
2756 || this_hdr
->sh_info
== elf_tdata (abfd
)->cverrefs
);
2760 this_hdr
->sh_entsize
= 4;
2764 if ((asect
->flags
& SEC_ALLOC
) != 0)
2765 this_hdr
->sh_flags
|= SHF_ALLOC
;
2766 if ((asect
->flags
& SEC_READONLY
) == 0)
2767 this_hdr
->sh_flags
|= SHF_WRITE
;
2768 if ((asect
->flags
& SEC_CODE
) != 0)
2769 this_hdr
->sh_flags
|= SHF_EXECINSTR
;
2770 if ((asect
->flags
& SEC_MERGE
) != 0)
2772 this_hdr
->sh_flags
|= SHF_MERGE
;
2773 this_hdr
->sh_entsize
= asect
->entsize
;
2774 if ((asect
->flags
& SEC_STRINGS
) != 0)
2775 this_hdr
->sh_flags
|= SHF_STRINGS
;
2777 if ((asect
->flags
& SEC_GROUP
) == 0 && elf_group_name (asect
) != NULL
)
2778 this_hdr
->sh_flags
|= SHF_GROUP
;
2779 if ((asect
->flags
& SEC_THREAD_LOCAL
) != 0)
2781 this_hdr
->sh_flags
|= SHF_TLS
;
2782 if (asect
->size
== 0
2783 && (asect
->flags
& SEC_HAS_CONTENTS
) == 0)
2785 struct bfd_link_order
*o
= asect
->map_tail
.link_order
;
2787 this_hdr
->sh_size
= 0;
2790 this_hdr
->sh_size
= o
->offset
+ o
->size
;
2791 if (this_hdr
->sh_size
!= 0)
2792 this_hdr
->sh_type
= SHT_NOBITS
;
2797 /* Check for processor-specific section types. */
2798 if (bed
->elf_backend_fake_sections
2799 && !(*bed
->elf_backend_fake_sections
) (abfd
, this_hdr
, asect
))
2802 /* If the section has relocs, set up a section header for the
2803 SHT_REL[A] section. If two relocation sections are required for
2804 this section, it is up to the processor-specific back-end to
2805 create the other. */
2806 if ((asect
->flags
& SEC_RELOC
) != 0
2807 && !_bfd_elf_init_reloc_shdr (abfd
,
2808 &elf_section_data (asect
)->rel_hdr
,
2814 /* Fill in the contents of a SHT_GROUP section. */
2817 bfd_elf_set_group_contents (bfd
*abfd
, asection
*sec
, void *failedptrarg
)
2819 bfd_boolean
*failedptr
= failedptrarg
;
2820 unsigned long symindx
;
2821 asection
*elt
, *first
;
2825 /* Ignore linker created group section. See elfNN_ia64_object_p in
2827 if (((sec
->flags
& (SEC_GROUP
| SEC_LINKER_CREATED
)) != SEC_GROUP
)
2832 if (elf_group_id (sec
) != NULL
)
2833 symindx
= elf_group_id (sec
)->udata
.i
;
2837 /* If called from the assembler, swap_out_syms will have set up
2838 elf_section_syms; If called for "ld -r", use target_index. */
2839 if (elf_section_syms (abfd
) != NULL
)
2840 symindx
= elf_section_syms (abfd
)[sec
->index
]->udata
.i
;
2842 symindx
= sec
->target_index
;
2844 elf_section_data (sec
)->this_hdr
.sh_info
= symindx
;
2846 /* The contents won't be allocated for "ld -r" or objcopy. */
2848 if (sec
->contents
== NULL
)
2851 sec
->contents
= bfd_alloc (abfd
, sec
->size
);
2853 /* Arrange for the section to be written out. */
2854 elf_section_data (sec
)->this_hdr
.contents
= sec
->contents
;
2855 if (sec
->contents
== NULL
)
2862 loc
= sec
->contents
+ sec
->size
;
2864 /* Get the pointer to the first section in the group that gas
2865 squirreled away here. objcopy arranges for this to be set to the
2866 start of the input section group. */
2867 first
= elt
= elf_next_in_group (sec
);
2869 /* First element is a flag word. Rest of section is elf section
2870 indices for all the sections of the group. Write them backwards
2871 just to keep the group in the same order as given in .section
2872 directives, not that it matters. */
2881 s
= s
->output_section
;
2884 idx
= elf_section_data (s
)->this_idx
;
2885 H_PUT_32 (abfd
, idx
, loc
);
2886 elt
= elf_next_in_group (elt
);
2891 if ((loc
-= 4) != sec
->contents
)
2894 H_PUT_32 (abfd
, sec
->flags
& SEC_LINK_ONCE
? GRP_COMDAT
: 0, loc
);
2897 /* Assign all ELF section numbers. The dummy first section is handled here
2898 too. The link/info pointers for the standard section types are filled
2899 in here too, while we're at it. */
2902 assign_section_numbers (bfd
*abfd
, struct bfd_link_info
*link_info
)
2904 struct elf_obj_tdata
*t
= elf_tdata (abfd
);
2906 unsigned int section_number
, secn
;
2907 Elf_Internal_Shdr
**i_shdrp
;
2908 struct bfd_elf_section_data
*d
;
2912 _bfd_elf_strtab_clear_all_refs (elf_shstrtab (abfd
));
2914 /* SHT_GROUP sections are in relocatable files only. */
2915 if (link_info
== NULL
|| link_info
->relocatable
)
2917 /* Put SHT_GROUP sections first. */
2918 for (sec
= abfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
2920 d
= elf_section_data (sec
);
2922 if (d
->this_hdr
.sh_type
== SHT_GROUP
)
2924 if (sec
->flags
& SEC_LINKER_CREATED
)
2926 /* Remove the linker created SHT_GROUP sections. */
2927 bfd_section_list_remove (abfd
, sec
);
2928 abfd
->section_count
--;
2932 if (section_number
== SHN_LORESERVE
)
2933 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2934 d
->this_idx
= section_number
++;
2940 for (sec
= abfd
->sections
; sec
; sec
= sec
->next
)
2942 d
= elf_section_data (sec
);
2944 if (d
->this_hdr
.sh_type
!= SHT_GROUP
)
2946 if (section_number
== SHN_LORESERVE
)
2947 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2948 d
->this_idx
= section_number
++;
2950 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->this_hdr
.sh_name
);
2951 if ((sec
->flags
& SEC_RELOC
) == 0)
2955 if (section_number
== SHN_LORESERVE
)
2956 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2957 d
->rel_idx
= section_number
++;
2958 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->rel_hdr
.sh_name
);
2963 if (section_number
== SHN_LORESERVE
)
2964 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2965 d
->rel_idx2
= section_number
++;
2966 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->rel_hdr2
->sh_name
);
2972 if (section_number
== SHN_LORESERVE
)
2973 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2974 t
->shstrtab_section
= section_number
++;
2975 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->shstrtab_hdr
.sh_name
);
2976 elf_elfheader (abfd
)->e_shstrndx
= t
->shstrtab_section
;
2978 if (bfd_get_symcount (abfd
) > 0)
2980 if (section_number
== SHN_LORESERVE
)
2981 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2982 t
->symtab_section
= section_number
++;
2983 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->symtab_hdr
.sh_name
);
2984 if (section_number
> SHN_LORESERVE
- 2)
2986 if (section_number
== SHN_LORESERVE
)
2987 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2988 t
->symtab_shndx_section
= section_number
++;
2989 t
->symtab_shndx_hdr
.sh_name
2990 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd
),
2991 ".symtab_shndx", FALSE
);
2992 if (t
->symtab_shndx_hdr
.sh_name
== (unsigned int) -1)
2995 if (section_number
== SHN_LORESERVE
)
2996 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2997 t
->strtab_section
= section_number
++;
2998 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->strtab_hdr
.sh_name
);
3001 _bfd_elf_strtab_finalize (elf_shstrtab (abfd
));
3002 t
->shstrtab_hdr
.sh_size
= _bfd_elf_strtab_size (elf_shstrtab (abfd
));
3004 elf_numsections (abfd
) = section_number
;
3005 elf_elfheader (abfd
)->e_shnum
= section_number
;
3006 if (section_number
> SHN_LORESERVE
)
3007 elf_elfheader (abfd
)->e_shnum
-= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
3009 /* Set up the list of section header pointers, in agreement with the
3011 i_shdrp
= bfd_zalloc2 (abfd
, section_number
, sizeof (Elf_Internal_Shdr
*));
3012 if (i_shdrp
== NULL
)
3015 i_shdrp
[0] = bfd_zalloc (abfd
, sizeof (Elf_Internal_Shdr
));
3016 if (i_shdrp
[0] == NULL
)
3018 bfd_release (abfd
, i_shdrp
);
3022 elf_elfsections (abfd
) = i_shdrp
;
3024 i_shdrp
[t
->shstrtab_section
] = &t
->shstrtab_hdr
;
3025 if (bfd_get_symcount (abfd
) > 0)
3027 i_shdrp
[t
->symtab_section
] = &t
->symtab_hdr
;
3028 if (elf_numsections (abfd
) > SHN_LORESERVE
)
3030 i_shdrp
[t
->symtab_shndx_section
] = &t
->symtab_shndx_hdr
;
3031 t
->symtab_shndx_hdr
.sh_link
= t
->symtab_section
;
3033 i_shdrp
[t
->strtab_section
] = &t
->strtab_hdr
;
3034 t
->symtab_hdr
.sh_link
= t
->strtab_section
;
3037 for (sec
= abfd
->sections
; sec
; sec
= sec
->next
)
3039 struct bfd_elf_section_data
*d
= elf_section_data (sec
);
3043 i_shdrp
[d
->this_idx
] = &d
->this_hdr
;
3044 if (d
->rel_idx
!= 0)
3045 i_shdrp
[d
->rel_idx
] = &d
->rel_hdr
;
3046 if (d
->rel_idx2
!= 0)
3047 i_shdrp
[d
->rel_idx2
] = d
->rel_hdr2
;
3049 /* Fill in the sh_link and sh_info fields while we're at it. */
3051 /* sh_link of a reloc section is the section index of the symbol
3052 table. sh_info is the section index of the section to which
3053 the relocation entries apply. */
3054 if (d
->rel_idx
!= 0)
3056 d
->rel_hdr
.sh_link
= t
->symtab_section
;
3057 d
->rel_hdr
.sh_info
= d
->this_idx
;
3059 if (d
->rel_idx2
!= 0)
3061 d
->rel_hdr2
->sh_link
= t
->symtab_section
;
3062 d
->rel_hdr2
->sh_info
= d
->this_idx
;
3065 /* We need to set up sh_link for SHF_LINK_ORDER. */
3066 if ((d
->this_hdr
.sh_flags
& SHF_LINK_ORDER
) != 0)
3068 s
= elf_linked_to_section (sec
);
3071 /* elf_linked_to_section points to the input section. */
3072 if (link_info
!= NULL
)
3074 /* Check discarded linkonce section. */
3075 if (elf_discarded_section (s
))
3078 (*_bfd_error_handler
)
3079 (_("%B: sh_link of section `%A' points to discarded section `%A' of `%B'"),
3080 abfd
, d
->this_hdr
.bfd_section
,
3082 /* Point to the kept section if it has the same
3083 size as the discarded one. */
3084 kept
= _bfd_elf_check_kept_section (s
);
3087 bfd_set_error (bfd_error_bad_value
);
3093 s
= s
->output_section
;
3094 BFD_ASSERT (s
!= NULL
);
3098 /* Handle objcopy. */
3099 if (s
->output_section
== NULL
)
3101 (*_bfd_error_handler
)
3102 (_("%B: sh_link of section `%A' points to removed section `%A' of `%B'"),
3103 abfd
, d
->this_hdr
.bfd_section
, s
, s
->owner
);
3104 bfd_set_error (bfd_error_bad_value
);
3107 s
= s
->output_section
;
3109 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
3114 The Intel C compiler generates SHT_IA_64_UNWIND with
3115 SHF_LINK_ORDER. But it doesn't set the sh_link or
3116 sh_info fields. Hence we could get the situation
3118 const struct elf_backend_data
*bed
3119 = get_elf_backend_data (abfd
);
3120 if (bed
->link_order_error_handler
)
3121 bed
->link_order_error_handler
3122 (_("%B: warning: sh_link not set for section `%A'"),
3127 switch (d
->this_hdr
.sh_type
)
3131 /* A reloc section which we are treating as a normal BFD
3132 section. sh_link is the section index of the symbol
3133 table. sh_info is the section index of the section to
3134 which the relocation entries apply. We assume that an
3135 allocated reloc section uses the dynamic symbol table.
3136 FIXME: How can we be sure? */
3137 s
= bfd_get_section_by_name (abfd
, ".dynsym");
3139 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
3141 /* We look up the section the relocs apply to by name. */
3143 if (d
->this_hdr
.sh_type
== SHT_REL
)
3147 s
= bfd_get_section_by_name (abfd
, name
);
3149 d
->this_hdr
.sh_info
= elf_section_data (s
)->this_idx
;
3153 /* We assume that a section named .stab*str is a stabs
3154 string section. We look for a section with the same name
3155 but without the trailing ``str'', and set its sh_link
3156 field to point to this section. */
3157 if (strncmp (sec
->name
, ".stab", sizeof ".stab" - 1) == 0
3158 && strcmp (sec
->name
+ strlen (sec
->name
) - 3, "str") == 0)
3163 len
= strlen (sec
->name
);
3164 alc
= bfd_malloc (len
- 2);
3167 memcpy (alc
, sec
->name
, len
- 3);
3168 alc
[len
- 3] = '\0';
3169 s
= bfd_get_section_by_name (abfd
, alc
);
3173 elf_section_data (s
)->this_hdr
.sh_link
= d
->this_idx
;
3175 /* This is a .stab section. */
3176 if (elf_section_data (s
)->this_hdr
.sh_entsize
== 0)
3177 elf_section_data (s
)->this_hdr
.sh_entsize
3178 = 4 + 2 * bfd_get_arch_size (abfd
) / 8;
3185 case SHT_GNU_verneed
:
3186 case SHT_GNU_verdef
:
3187 /* sh_link is the section header index of the string table
3188 used for the dynamic entries, or the symbol table, or the
3190 s
= bfd_get_section_by_name (abfd
, ".dynstr");
3192 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
3195 case SHT_GNU_LIBLIST
:
3196 /* sh_link is the section header index of the prelink library
3198 used for the dynamic entries, or the symbol table, or the
3200 s
= bfd_get_section_by_name (abfd
, (sec
->flags
& SEC_ALLOC
)
3201 ? ".dynstr" : ".gnu.libstr");
3203 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
3207 case SHT_GNU_versym
:
3208 /* sh_link is the section header index of the symbol table
3209 this hash table or version table is for. */
3210 s
= bfd_get_section_by_name (abfd
, ".dynsym");
3212 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
3216 d
->this_hdr
.sh_link
= t
->symtab_section
;
3220 for (secn
= 1; secn
< section_number
; ++secn
)
3221 if (i_shdrp
[secn
] == NULL
)
3222 i_shdrp
[secn
] = i_shdrp
[0];
3224 i_shdrp
[secn
]->sh_name
= _bfd_elf_strtab_offset (elf_shstrtab (abfd
),
3225 i_shdrp
[secn
]->sh_name
);
3229 /* Map symbol from it's internal number to the external number, moving
3230 all local symbols to be at the head of the list. */
3233 sym_is_global (bfd
*abfd
, asymbol
*sym
)
3235 /* If the backend has a special mapping, use it. */
3236 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3237 if (bed
->elf_backend_sym_is_global
)
3238 return (*bed
->elf_backend_sym_is_global
) (abfd
, sym
);
3240 return ((sym
->flags
& (BSF_GLOBAL
| BSF_WEAK
)) != 0
3241 || bfd_is_und_section (bfd_get_section (sym
))
3242 || bfd_is_com_section (bfd_get_section (sym
)));
3246 elf_map_symbols (bfd
*abfd
)
3248 unsigned int symcount
= bfd_get_symcount (abfd
);
3249 asymbol
**syms
= bfd_get_outsymbols (abfd
);
3250 asymbol
**sect_syms
;
3251 unsigned int num_locals
= 0;
3252 unsigned int num_globals
= 0;
3253 unsigned int num_locals2
= 0;
3254 unsigned int num_globals2
= 0;
3261 fprintf (stderr
, "elf_map_symbols\n");
3265 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
3267 if (max_index
< asect
->index
)
3268 max_index
= asect
->index
;
3272 sect_syms
= bfd_zalloc2 (abfd
, max_index
, sizeof (asymbol
*));
3273 if (sect_syms
== NULL
)
3275 elf_section_syms (abfd
) = sect_syms
;
3276 elf_num_section_syms (abfd
) = max_index
;
3278 /* Init sect_syms entries for any section symbols we have already
3279 decided to output. */
3280 for (idx
= 0; idx
< symcount
; idx
++)
3282 asymbol
*sym
= syms
[idx
];
3284 if ((sym
->flags
& BSF_SECTION_SYM
) != 0
3291 if (sec
->owner
!= NULL
)
3293 if (sec
->owner
!= abfd
)
3295 if (sec
->output_offset
!= 0)
3298 sec
= sec
->output_section
;
3300 /* Empty sections in the input files may have had a
3301 section symbol created for them. (See the comment
3302 near the end of _bfd_generic_link_output_symbols in
3303 linker.c). If the linker script discards such
3304 sections then we will reach this point. Since we know
3305 that we cannot avoid this case, we detect it and skip
3306 the abort and the assignment to the sect_syms array.
3307 To reproduce this particular case try running the
3308 linker testsuite test ld-scripts/weak.exp for an ELF
3309 port that uses the generic linker. */
3310 if (sec
->owner
== NULL
)
3313 BFD_ASSERT (sec
->owner
== abfd
);
3315 sect_syms
[sec
->index
] = syms
[idx
];
3320 /* Classify all of the symbols. */
3321 for (idx
= 0; idx
< symcount
; idx
++)
3323 if (!sym_is_global (abfd
, syms
[idx
]))
3329 /* We will be adding a section symbol for each BFD section. Most normal
3330 sections will already have a section symbol in outsymbols, but
3331 eg. SHT_GROUP sections will not, and we need the section symbol mapped
3332 at least in that case. */
3333 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
3335 if (sect_syms
[asect
->index
] == NULL
)
3337 if (!sym_is_global (abfd
, asect
->symbol
))
3344 /* Now sort the symbols so the local symbols are first. */
3345 new_syms
= bfd_alloc2 (abfd
, num_locals
+ num_globals
, sizeof (asymbol
*));
3347 if (new_syms
== NULL
)
3350 for (idx
= 0; idx
< symcount
; idx
++)
3352 asymbol
*sym
= syms
[idx
];
3355 if (!sym_is_global (abfd
, sym
))
3358 i
= num_locals
+ num_globals2
++;
3360 sym
->udata
.i
= i
+ 1;
3362 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
3364 if (sect_syms
[asect
->index
] == NULL
)
3366 asymbol
*sym
= asect
->symbol
;
3369 sect_syms
[asect
->index
] = sym
;
3370 if (!sym_is_global (abfd
, sym
))
3373 i
= num_locals
+ num_globals2
++;
3375 sym
->udata
.i
= i
+ 1;
3379 bfd_set_symtab (abfd
, new_syms
, num_locals
+ num_globals
);
3381 elf_num_locals (abfd
) = num_locals
;
3382 elf_num_globals (abfd
) = num_globals
;
3386 /* Align to the maximum file alignment that could be required for any
3387 ELF data structure. */
3389 static inline file_ptr
3390 align_file_position (file_ptr off
, int align
)
3392 return (off
+ align
- 1) & ~(align
- 1);
3395 /* Assign a file position to a section, optionally aligning to the
3396 required section alignment. */
3399 _bfd_elf_assign_file_position_for_section (Elf_Internal_Shdr
*i_shdrp
,
3407 al
= i_shdrp
->sh_addralign
;
3409 offset
= BFD_ALIGN (offset
, al
);
3411 i_shdrp
->sh_offset
= offset
;
3412 if (i_shdrp
->bfd_section
!= NULL
)
3413 i_shdrp
->bfd_section
->filepos
= offset
;
3414 if (i_shdrp
->sh_type
!= SHT_NOBITS
)
3415 offset
+= i_shdrp
->sh_size
;
3419 /* Compute the file positions we are going to put the sections at, and
3420 otherwise prepare to begin writing out the ELF file. If LINK_INFO
3421 is not NULL, this is being called by the ELF backend linker. */
3424 _bfd_elf_compute_section_file_positions (bfd
*abfd
,
3425 struct bfd_link_info
*link_info
)
3427 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3429 struct bfd_strtab_hash
*strtab
= NULL
;
3430 Elf_Internal_Shdr
*shstrtab_hdr
;
3432 if (abfd
->output_has_begun
)
3435 /* Do any elf backend specific processing first. */
3436 if (bed
->elf_backend_begin_write_processing
)
3437 (*bed
->elf_backend_begin_write_processing
) (abfd
, link_info
);
3439 if (! prep_headers (abfd
))
3442 /* Post process the headers if necessary. */
3443 if (bed
->elf_backend_post_process_headers
)
3444 (*bed
->elf_backend_post_process_headers
) (abfd
, link_info
);
3447 bfd_map_over_sections (abfd
, elf_fake_sections
, &failed
);
3451 if (!assign_section_numbers (abfd
, link_info
))
3454 /* The backend linker builds symbol table information itself. */
3455 if (link_info
== NULL
&& bfd_get_symcount (abfd
) > 0)
3457 /* Non-zero if doing a relocatable link. */
3458 int relocatable_p
= ! (abfd
->flags
& (EXEC_P
| DYNAMIC
));
3460 if (! swap_out_syms (abfd
, &strtab
, relocatable_p
))
3464 if (link_info
== NULL
)
3466 bfd_map_over_sections (abfd
, bfd_elf_set_group_contents
, &failed
);
3471 shstrtab_hdr
= &elf_tdata (abfd
)->shstrtab_hdr
;
3472 /* sh_name was set in prep_headers. */
3473 shstrtab_hdr
->sh_type
= SHT_STRTAB
;
3474 shstrtab_hdr
->sh_flags
= 0;
3475 shstrtab_hdr
->sh_addr
= 0;
3476 shstrtab_hdr
->sh_size
= _bfd_elf_strtab_size (elf_shstrtab (abfd
));
3477 shstrtab_hdr
->sh_entsize
= 0;
3478 shstrtab_hdr
->sh_link
= 0;
3479 shstrtab_hdr
->sh_info
= 0;
3480 /* sh_offset is set in assign_file_positions_except_relocs. */
3481 shstrtab_hdr
->sh_addralign
= 1;
3483 if (!assign_file_positions_except_relocs (abfd
, link_info
))
3486 if (link_info
== NULL
&& bfd_get_symcount (abfd
) > 0)
3489 Elf_Internal_Shdr
*hdr
;
3491 off
= elf_tdata (abfd
)->next_file_pos
;
3493 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
3494 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
3496 hdr
= &elf_tdata (abfd
)->symtab_shndx_hdr
;
3497 if (hdr
->sh_size
!= 0)
3498 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
3500 hdr
= &elf_tdata (abfd
)->strtab_hdr
;
3501 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
3503 elf_tdata (abfd
)->next_file_pos
= off
;
3505 /* Now that we know where the .strtab section goes, write it
3507 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
3508 || ! _bfd_stringtab_emit (abfd
, strtab
))
3510 _bfd_stringtab_free (strtab
);
3513 abfd
->output_has_begun
= TRUE
;
3518 /* Create a mapping from a set of sections to a program segment. */
3520 static struct elf_segment_map
*
3521 make_mapping (bfd
*abfd
,
3522 asection
**sections
,
3527 struct elf_segment_map
*m
;
3532 amt
= sizeof (struct elf_segment_map
);
3533 amt
+= (to
- from
- 1) * sizeof (asection
*);
3534 m
= bfd_zalloc (abfd
, amt
);
3538 m
->p_type
= PT_LOAD
;
3539 for (i
= from
, hdrpp
= sections
+ from
; i
< to
; i
++, hdrpp
++)
3540 m
->sections
[i
- from
] = *hdrpp
;
3541 m
->count
= to
- from
;
3543 if (from
== 0 && phdr
)
3545 /* Include the headers in the first PT_LOAD segment. */
3546 m
->includes_filehdr
= 1;
3547 m
->includes_phdrs
= 1;
3553 /* Create the PT_DYNAMIC segment, which includes DYNSEC. Returns NULL
3556 struct elf_segment_map
*
3557 _bfd_elf_make_dynamic_segment (bfd
*abfd
, asection
*dynsec
)
3559 struct elf_segment_map
*m
;
3561 m
= bfd_zalloc (abfd
, sizeof (struct elf_segment_map
));
3565 m
->p_type
= PT_DYNAMIC
;
3567 m
->sections
[0] = dynsec
;
3572 /* Set up a mapping from BFD sections to program segments. */
3575 map_sections_to_segments (bfd
*abfd
)
3577 asection
**sections
= NULL
;
3581 struct elf_segment_map
*mfirst
;
3582 struct elf_segment_map
**pm
;
3583 struct elf_segment_map
*m
;
3586 unsigned int phdr_index
;
3587 bfd_vma maxpagesize
;
3589 bfd_boolean phdr_in_segment
= TRUE
;
3590 bfd_boolean writable
;
3592 asection
*first_tls
= NULL
;
3593 asection
*dynsec
, *eh_frame_hdr
;
3596 if (elf_tdata (abfd
)->segment_map
!= NULL
)
3599 if (bfd_count_sections (abfd
) == 0)
3602 /* Select the allocated sections, and sort them. */
3604 sections
= bfd_malloc2 (bfd_count_sections (abfd
), sizeof (asection
*));
3605 if (sections
== NULL
)
3609 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
3611 if ((s
->flags
& SEC_ALLOC
) != 0)
3617 BFD_ASSERT (i
<= bfd_count_sections (abfd
));
3620 qsort (sections
, (size_t) count
, sizeof (asection
*), elf_sort_sections
);
3622 /* Build the mapping. */
3627 /* If we have a .interp section, then create a PT_PHDR segment for
3628 the program headers and a PT_INTERP segment for the .interp
3630 s
= bfd_get_section_by_name (abfd
, ".interp");
3631 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0)
3633 amt
= sizeof (struct elf_segment_map
);
3634 m
= bfd_zalloc (abfd
, amt
);
3638 m
->p_type
= PT_PHDR
;
3639 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
3640 m
->p_flags
= PF_R
| PF_X
;
3641 m
->p_flags_valid
= 1;
3642 m
->includes_phdrs
= 1;
3647 amt
= sizeof (struct elf_segment_map
);
3648 m
= bfd_zalloc (abfd
, amt
);
3652 m
->p_type
= PT_INTERP
;
3660 /* Look through the sections. We put sections in the same program
3661 segment when the start of the second section can be placed within
3662 a few bytes of the end of the first section. */
3666 maxpagesize
= get_elf_backend_data (abfd
)->maxpagesize
;
3668 dynsec
= bfd_get_section_by_name (abfd
, ".dynamic");
3670 && (dynsec
->flags
& SEC_LOAD
) == 0)
3673 /* Deal with -Ttext or something similar such that the first section
3674 is not adjacent to the program headers. This is an
3675 approximation, since at this point we don't know exactly how many
3676 program headers we will need. */
3679 bfd_size_type phdr_size
;
3681 phdr_size
= elf_tdata (abfd
)->program_header_size
;
3683 phdr_size
= get_elf_backend_data (abfd
)->s
->sizeof_phdr
;
3684 if ((abfd
->flags
& D_PAGED
) == 0
3685 || sections
[0]->lma
< phdr_size
3686 || sections
[0]->lma
% maxpagesize
< phdr_size
% maxpagesize
)
3687 phdr_in_segment
= FALSE
;
3690 for (i
= 0, hdrpp
= sections
; i
< count
; i
++, hdrpp
++)
3693 bfd_boolean new_segment
;
3697 /* See if this section and the last one will fit in the same
3700 if (last_hdr
== NULL
)
3702 /* If we don't have a segment yet, then we don't need a new
3703 one (we build the last one after this loop). */
3704 new_segment
= FALSE
;
3706 else if (last_hdr
->lma
- last_hdr
->vma
!= hdr
->lma
- hdr
->vma
)
3708 /* If this section has a different relation between the
3709 virtual address and the load address, then we need a new
3713 else if (BFD_ALIGN (last_hdr
->lma
+ last_size
, maxpagesize
)
3714 < BFD_ALIGN (hdr
->lma
, maxpagesize
))
3716 /* If putting this section in this segment would force us to
3717 skip a page in the segment, then we need a new segment. */
3720 else if ((last_hdr
->flags
& (SEC_LOAD
| SEC_THREAD_LOCAL
)) == 0
3721 && (hdr
->flags
& (SEC_LOAD
| SEC_THREAD_LOCAL
)) != 0)
3723 /* We don't want to put a loadable section after a
3724 nonloadable section in the same segment.
3725 Consider .tbss sections as loadable for this purpose. */
3728 else if ((abfd
->flags
& D_PAGED
) == 0)
3730 /* If the file is not demand paged, which means that we
3731 don't require the sections to be correctly aligned in the
3732 file, then there is no other reason for a new segment. */
3733 new_segment
= FALSE
;
3736 && (hdr
->flags
& SEC_READONLY
) == 0
3737 && (((last_hdr
->lma
+ last_size
- 1)
3738 & ~(maxpagesize
- 1))
3739 != (hdr
->lma
& ~(maxpagesize
- 1))))
3741 /* We don't want to put a writable section in a read only
3742 segment, unless they are on the same page in memory
3743 anyhow. We already know that the last section does not
3744 bring us past the current section on the page, so the
3745 only case in which the new section is not on the same
3746 page as the previous section is when the previous section
3747 ends precisely on a page boundary. */
3752 /* Otherwise, we can use the same segment. */
3753 new_segment
= FALSE
;
3758 if ((hdr
->flags
& SEC_READONLY
) == 0)
3761 /* .tbss sections effectively have zero size. */
3762 if ((hdr
->flags
& (SEC_THREAD_LOCAL
| SEC_LOAD
)) != SEC_THREAD_LOCAL
)
3763 last_size
= hdr
->size
;
3769 /* We need a new program segment. We must create a new program
3770 header holding all the sections from phdr_index until hdr. */
3772 m
= make_mapping (abfd
, sections
, phdr_index
, i
, phdr_in_segment
);
3779 if ((hdr
->flags
& SEC_READONLY
) == 0)
3785 /* .tbss sections effectively have zero size. */
3786 if ((hdr
->flags
& (SEC_THREAD_LOCAL
| SEC_LOAD
)) != SEC_THREAD_LOCAL
)
3787 last_size
= hdr
->size
;
3791 phdr_in_segment
= FALSE
;
3794 /* Create a final PT_LOAD program segment. */
3795 if (last_hdr
!= NULL
)
3797 m
= make_mapping (abfd
, sections
, phdr_index
, i
, phdr_in_segment
);
3805 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
3808 m
= _bfd_elf_make_dynamic_segment (abfd
, dynsec
);
3815 /* For each loadable .note section, add a PT_NOTE segment. We don't
3816 use bfd_get_section_by_name, because if we link together
3817 nonloadable .note sections and loadable .note sections, we will
3818 generate two .note sections in the output file. FIXME: Using
3819 names for section types is bogus anyhow. */
3820 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
3822 if ((s
->flags
& SEC_LOAD
) != 0
3823 && strncmp (s
->name
, ".note", 5) == 0)
3825 amt
= sizeof (struct elf_segment_map
);
3826 m
= bfd_zalloc (abfd
, amt
);
3830 m
->p_type
= PT_NOTE
;
3837 if (s
->flags
& SEC_THREAD_LOCAL
)
3845 /* If there are any SHF_TLS output sections, add PT_TLS segment. */
3850 amt
= sizeof (struct elf_segment_map
);
3851 amt
+= (tls_count
- 1) * sizeof (asection
*);
3852 m
= bfd_zalloc (abfd
, amt
);
3857 m
->count
= tls_count
;
3858 /* Mandated PF_R. */
3860 m
->p_flags_valid
= 1;
3861 for (i
= 0; i
< tls_count
; ++i
)
3863 BFD_ASSERT (first_tls
->flags
& SEC_THREAD_LOCAL
);
3864 m
->sections
[i
] = first_tls
;
3865 first_tls
= first_tls
->next
;
3872 /* If there is a .eh_frame_hdr section, throw in a PT_GNU_EH_FRAME
3874 eh_frame_hdr
= elf_tdata (abfd
)->eh_frame_hdr
;
3875 if (eh_frame_hdr
!= NULL
3876 && (eh_frame_hdr
->output_section
->flags
& SEC_LOAD
) != 0)
3878 amt
= sizeof (struct elf_segment_map
);
3879 m
= bfd_zalloc (abfd
, amt
);
3883 m
->p_type
= PT_GNU_EH_FRAME
;
3885 m
->sections
[0] = eh_frame_hdr
->output_section
;
3891 if (elf_tdata (abfd
)->stack_flags
)
3893 amt
= sizeof (struct elf_segment_map
);
3894 m
= bfd_zalloc (abfd
, amt
);
3898 m
->p_type
= PT_GNU_STACK
;
3899 m
->p_flags
= elf_tdata (abfd
)->stack_flags
;
3900 m
->p_flags_valid
= 1;
3906 if (elf_tdata (abfd
)->relro
)
3908 amt
= sizeof (struct elf_segment_map
);
3909 m
= bfd_zalloc (abfd
, amt
);
3913 m
->p_type
= PT_GNU_RELRO
;
3915 m
->p_flags_valid
= 1;
3924 elf_tdata (abfd
)->segment_map
= mfirst
;
3928 if (sections
!= NULL
)
3933 /* Sort sections by address. */
3936 elf_sort_sections (const void *arg1
, const void *arg2
)
3938 const asection
*sec1
= *(const asection
**) arg1
;
3939 const asection
*sec2
= *(const asection
**) arg2
;
3940 bfd_size_type size1
, size2
;
3942 /* Sort by LMA first, since this is the address used to
3943 place the section into a segment. */
3944 if (sec1
->lma
< sec2
->lma
)
3946 else if (sec1
->lma
> sec2
->lma
)
3949 /* Then sort by VMA. Normally the LMA and the VMA will be
3950 the same, and this will do nothing. */
3951 if (sec1
->vma
< sec2
->vma
)
3953 else if (sec1
->vma
> sec2
->vma
)
3956 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
3958 #define TOEND(x) (((x)->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0)
3964 /* If the indicies are the same, do not return 0
3965 here, but continue to try the next comparison. */
3966 if (sec1
->target_index
- sec2
->target_index
!= 0)
3967 return sec1
->target_index
- sec2
->target_index
;
3972 else if (TOEND (sec2
))
3977 /* Sort by size, to put zero sized sections
3978 before others at the same address. */
3980 size1
= (sec1
->flags
& SEC_LOAD
) ? sec1
->size
: 0;
3981 size2
= (sec2
->flags
& SEC_LOAD
) ? sec2
->size
: 0;
3988 return sec1
->target_index
- sec2
->target_index
;
3991 /* Ian Lance Taylor writes:
3993 We shouldn't be using % with a negative signed number. That's just
3994 not good. We have to make sure either that the number is not
3995 negative, or that the number has an unsigned type. When the types
3996 are all the same size they wind up as unsigned. When file_ptr is a
3997 larger signed type, the arithmetic winds up as signed long long,
4000 What we're trying to say here is something like ``increase OFF by
4001 the least amount that will cause it to be equal to the VMA modulo
4003 /* In other words, something like:
4005 vma_offset = m->sections[0]->vma % bed->maxpagesize;
4006 off_offset = off % bed->maxpagesize;
4007 if (vma_offset < off_offset)
4008 adjustment = vma_offset + bed->maxpagesize - off_offset;
4010 adjustment = vma_offset - off_offset;
4012 which can can be collapsed into the expression below. */
4015 vma_page_aligned_bias (bfd_vma vma
, ufile_ptr off
, bfd_vma maxpagesize
)
4017 return ((vma
- off
) % maxpagesize
);
4020 /* Assign file positions to the sections based on the mapping from
4021 sections to segments. This function also sets up some fields in
4022 the file header, and writes out the program headers. */
4025 assign_file_positions_for_segments (bfd
*abfd
, struct bfd_link_info
*link_info
)
4027 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4029 struct elf_segment_map
*m
;
4031 Elf_Internal_Phdr
*phdrs
;
4033 bfd_vma filehdr_vaddr
, filehdr_paddr
;
4034 bfd_vma phdrs_vaddr
, phdrs_paddr
;
4035 Elf_Internal_Phdr
*p
;
4037 if (elf_tdata (abfd
)->segment_map
== NULL
)
4039 if (! map_sections_to_segments (abfd
))
4044 /* The placement algorithm assumes that non allocated sections are
4045 not in PT_LOAD segments. We ensure this here by removing such
4046 sections from the segment map. We also remove excluded
4048 for (m
= elf_tdata (abfd
)->segment_map
;
4052 unsigned int new_count
;
4056 for (i
= 0; i
< m
->count
; i
++)
4058 if ((m
->sections
[i
]->flags
& SEC_EXCLUDE
) == 0
4059 && ((m
->sections
[i
]->flags
& SEC_ALLOC
) != 0
4060 || m
->p_type
!= PT_LOAD
))
4063 m
->sections
[new_count
] = m
->sections
[i
];
4069 if (new_count
!= m
->count
)
4070 m
->count
= new_count
;
4074 if (bed
->elf_backend_modify_segment_map
)
4076 if (! (*bed
->elf_backend_modify_segment_map
) (abfd
, link_info
))
4081 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
4084 elf_elfheader (abfd
)->e_phoff
= bed
->s
->sizeof_ehdr
;
4085 elf_elfheader (abfd
)->e_phentsize
= bed
->s
->sizeof_phdr
;
4086 elf_elfheader (abfd
)->e_phnum
= count
;
4090 elf_tdata (abfd
)->next_file_pos
= bed
->s
->sizeof_ehdr
;
4094 /* If we already counted the number of program segments, make sure
4095 that we allocated enough space. This happens when SIZEOF_HEADERS
4096 is used in a linker script. */
4097 alloc
= elf_tdata (abfd
)->program_header_size
/ bed
->s
->sizeof_phdr
;
4098 if (alloc
!= 0 && count
> alloc
)
4100 ((*_bfd_error_handler
)
4101 (_("%B: Not enough room for program headers (allocated %u, need %u)"),
4102 abfd
, alloc
, count
));
4103 bfd_set_error (bfd_error_bad_value
);
4110 phdrs
= bfd_alloc2 (abfd
, alloc
, sizeof (Elf_Internal_Phdr
));
4114 off
= bed
->s
->sizeof_ehdr
;
4115 off
+= alloc
* bed
->s
->sizeof_phdr
;
4122 for (m
= elf_tdata (abfd
)->segment_map
, p
= phdrs
;
4129 /* If elf_segment_map is not from map_sections_to_segments, the
4130 sections may not be correctly ordered. NOTE: sorting should
4131 not be done to the PT_NOTE section of a corefile, which may
4132 contain several pseudo-sections artificially created by bfd.
4133 Sorting these pseudo-sections breaks things badly. */
4135 && !(elf_elfheader (abfd
)->e_type
== ET_CORE
4136 && m
->p_type
== PT_NOTE
))
4137 qsort (m
->sections
, (size_t) m
->count
, sizeof (asection
*),
4140 /* An ELF segment (described by Elf_Internal_Phdr) may contain a
4141 number of sections with contents contributing to both p_filesz
4142 and p_memsz, followed by a number of sections with no contents
4143 that just contribute to p_memsz. In this loop, OFF tracks next
4144 available file offset for PT_LOAD and PT_NOTE segments. VOFF is
4145 an adjustment we use for segments that have no file contents
4146 but need zero filled memory allocation. */
4148 p
->p_type
= m
->p_type
;
4149 p
->p_flags
= m
->p_flags
;
4151 if (p
->p_type
== PT_LOAD
4154 bfd_size_type align
;
4156 unsigned int align_power
= 0;
4158 for (i
= 0, secpp
= m
->sections
; i
< m
->count
; i
++, secpp
++)
4160 unsigned int secalign
;
4162 secalign
= bfd_get_section_alignment (abfd
, *secpp
);
4163 if (secalign
> align_power
)
4164 align_power
= secalign
;
4166 align
= (bfd_size_type
) 1 << align_power
;
4168 if ((abfd
->flags
& D_PAGED
) != 0 && bed
->maxpagesize
> align
)
4169 align
= bed
->maxpagesize
;
4171 adjust
= vma_page_aligned_bias (m
->sections
[0]->vma
, off
, align
);
4174 && !m
->includes_filehdr
4175 && !m
->includes_phdrs
4176 && (ufile_ptr
) off
>= align
)
4178 /* If the first section isn't loadable, the same holds for
4179 any other sections. Since the segment won't need file
4180 space, we can make p_offset overlap some prior segment.
4181 However, .tbss is special. If a segment starts with
4182 .tbss, we need to look at the next section to decide
4183 whether the segment has any loadable sections. */
4185 while ((m
->sections
[i
]->flags
& SEC_LOAD
) == 0)
4187 if ((m
->sections
[i
]->flags
& SEC_THREAD_LOCAL
) == 0
4191 voff
= adjust
- align
;
4197 /* Make sure the .dynamic section is the first section in the
4198 PT_DYNAMIC segment. */
4199 else if (p
->p_type
== PT_DYNAMIC
4201 && strcmp (m
->sections
[0]->name
, ".dynamic") != 0)
4204 (_("%B: The first section in the PT_DYNAMIC segment is not the .dynamic section"),
4206 bfd_set_error (bfd_error_bad_value
);
4213 p
->p_vaddr
= m
->sections
[0]->vma
;
4215 if (m
->p_paddr_valid
)
4216 p
->p_paddr
= m
->p_paddr
;
4217 else if (m
->count
== 0)
4220 p
->p_paddr
= m
->sections
[0]->lma
;
4222 if (p
->p_type
== PT_LOAD
4223 && (abfd
->flags
& D_PAGED
) != 0)
4224 p
->p_align
= bed
->maxpagesize
;
4225 else if (m
->count
== 0)
4226 p
->p_align
= 1 << bed
->s
->log_file_align
;
4234 if (m
->includes_filehdr
)
4236 if (! m
->p_flags_valid
)
4239 p
->p_filesz
= bed
->s
->sizeof_ehdr
;
4240 p
->p_memsz
= bed
->s
->sizeof_ehdr
;
4243 BFD_ASSERT (p
->p_type
== PT_LOAD
);
4245 if (p
->p_vaddr
< (bfd_vma
) off
)
4247 (*_bfd_error_handler
)
4248 (_("%B: Not enough room for program headers, try linking with -N"),
4250 bfd_set_error (bfd_error_bad_value
);
4255 if (! m
->p_paddr_valid
)
4258 if (p
->p_type
== PT_LOAD
)
4260 filehdr_vaddr
= p
->p_vaddr
;
4261 filehdr_paddr
= p
->p_paddr
;
4265 if (m
->includes_phdrs
)
4267 if (! m
->p_flags_valid
)
4270 if (m
->includes_filehdr
)
4272 if (p
->p_type
== PT_LOAD
)
4274 phdrs_vaddr
= p
->p_vaddr
+ bed
->s
->sizeof_ehdr
;
4275 phdrs_paddr
= p
->p_paddr
+ bed
->s
->sizeof_ehdr
;
4280 p
->p_offset
= bed
->s
->sizeof_ehdr
;
4284 BFD_ASSERT (p
->p_type
== PT_LOAD
);
4285 p
->p_vaddr
-= off
- p
->p_offset
;
4286 if (! m
->p_paddr_valid
)
4287 p
->p_paddr
-= off
- p
->p_offset
;
4290 if (p
->p_type
== PT_LOAD
)
4292 phdrs_vaddr
= p
->p_vaddr
;
4293 phdrs_paddr
= p
->p_paddr
;
4296 phdrs_vaddr
= bed
->maxpagesize
+ bed
->s
->sizeof_ehdr
;
4299 p
->p_filesz
+= alloc
* bed
->s
->sizeof_phdr
;
4300 p
->p_memsz
+= alloc
* bed
->s
->sizeof_phdr
;
4303 if (p
->p_type
== PT_LOAD
4304 || (p
->p_type
== PT_NOTE
&& bfd_get_format (abfd
) == bfd_core
))
4306 if (! m
->includes_filehdr
&& ! m
->includes_phdrs
)
4307 p
->p_offset
= off
+ voff
;
4312 adjust
= off
- (p
->p_offset
+ p
->p_filesz
);
4313 p
->p_filesz
+= adjust
;
4314 p
->p_memsz
+= adjust
;
4318 for (i
= 0, secpp
= m
->sections
; i
< m
->count
; i
++, secpp
++)
4322 bfd_size_type align
;
4326 align
= 1 << bfd_get_section_alignment (abfd
, sec
);
4328 if (p
->p_type
== PT_LOAD
4329 || p
->p_type
== PT_TLS
)
4331 bfd_signed_vma adjust
;
4333 if ((flags
& SEC_LOAD
) != 0)
4335 adjust
= sec
->lma
- (p
->p_paddr
+ p
->p_filesz
);
4338 (*_bfd_error_handler
)
4339 (_("%B: section %A lma 0x%lx overlaps previous sections"),
4340 abfd
, sec
, (unsigned long) sec
->lma
);
4344 p
->p_filesz
+= adjust
;
4345 p
->p_memsz
+= adjust
;
4347 /* .tbss is special. It doesn't contribute to p_memsz of
4349 else if ((flags
& SEC_THREAD_LOCAL
) == 0
4350 || p
->p_type
== PT_TLS
)
4352 /* The section VMA must equal the file position
4353 modulo the page size. */
4354 bfd_size_type page
= align
;
4355 if ((abfd
->flags
& D_PAGED
) != 0 && bed
->maxpagesize
> page
)
4356 page
= bed
->maxpagesize
;
4357 adjust
= vma_page_aligned_bias (sec
->vma
,
4358 p
->p_vaddr
+ p
->p_memsz
,
4360 p
->p_memsz
+= adjust
;
4364 if (p
->p_type
== PT_NOTE
&& bfd_get_format (abfd
) == bfd_core
)
4366 /* The section at i == 0 is the one that actually contains
4372 p
->p_filesz
= sec
->size
;
4378 /* The rest are fake sections that shouldn't be written. */
4387 if (p
->p_type
== PT_LOAD
)
4390 /* FIXME: The SEC_HAS_CONTENTS test here dates back to
4391 1997, and the exact reason for it isn't clear. One
4392 plausible explanation is that it is to work around
4393 a problem we have with linker scripts using data
4394 statements in NOLOAD sections. I don't think it
4395 makes a great deal of sense to have such a section
4396 assigned to a PT_LOAD segment, but apparently
4397 people do this. The data statement results in a
4398 bfd_data_link_order being built, and these need
4399 section contents to write into. Eventually, we get
4400 to _bfd_elf_write_object_contents which writes any
4401 section with contents to the output. Make room
4402 here for the write, so that following segments are
4404 if ((flags
& SEC_LOAD
) != 0
4405 || (flags
& SEC_HAS_CONTENTS
) != 0)
4409 if ((flags
& SEC_LOAD
) != 0)
4411 p
->p_filesz
+= sec
->size
;
4412 p
->p_memsz
+= sec
->size
;
4414 /* PR ld/594: Sections in note segments which are not loaded
4415 contribute to the file size but not the in-memory size. */
4416 else if (p
->p_type
== PT_NOTE
4417 && (flags
& SEC_HAS_CONTENTS
) != 0)
4418 p
->p_filesz
+= sec
->size
;
4420 /* .tbss is special. It doesn't contribute to p_memsz of
4422 else if ((flags
& SEC_THREAD_LOCAL
) == 0
4423 || p
->p_type
== PT_TLS
)
4424 p
->p_memsz
+= sec
->size
;
4426 if (p
->p_type
== PT_TLS
4428 && (sec
->flags
& SEC_HAS_CONTENTS
) == 0)
4430 struct bfd_link_order
*o
= sec
->map_tail
.link_order
;
4432 p
->p_memsz
+= o
->offset
+ o
->size
;
4435 if (align
> p
->p_align
4436 && (p
->p_type
!= PT_LOAD
|| (abfd
->flags
& D_PAGED
) == 0))
4440 if (! m
->p_flags_valid
)
4443 if ((flags
& SEC_CODE
) != 0)
4445 if ((flags
& SEC_READONLY
) == 0)
4451 /* Now that we have set the section file positions, we can set up
4452 the file positions for the non PT_LOAD segments. */
4453 for (m
= elf_tdata (abfd
)->segment_map
, p
= phdrs
;
4457 if (p
->p_type
!= PT_LOAD
&& m
->count
> 0)
4459 BFD_ASSERT (! m
->includes_filehdr
&& ! m
->includes_phdrs
);
4460 /* If the section has not yet been assigned a file position,
4461 do so now. The ARM BPABI requires that .dynamic section
4462 not be marked SEC_ALLOC because it is not part of any
4463 PT_LOAD segment, so it will not be processed above. */
4464 if (p
->p_type
== PT_DYNAMIC
&& m
->sections
[0]->filepos
== 0)
4467 Elf_Internal_Shdr
** const i_shdrpp
= elf_elfsections (abfd
);
4470 while (i_shdrpp
[i
]->bfd_section
!= m
->sections
[0])
4472 off
= (_bfd_elf_assign_file_position_for_section
4473 (i_shdrpp
[i
], off
, TRUE
));
4474 p
->p_filesz
= m
->sections
[0]->size
;
4476 p
->p_offset
= m
->sections
[0]->filepos
;
4480 if (m
->includes_filehdr
)
4482 p
->p_vaddr
= filehdr_vaddr
;
4483 if (! m
->p_paddr_valid
)
4484 p
->p_paddr
= filehdr_paddr
;
4486 else if (m
->includes_phdrs
)
4488 p
->p_vaddr
= phdrs_vaddr
;
4489 if (! m
->p_paddr_valid
)
4490 p
->p_paddr
= phdrs_paddr
;
4492 else if (p
->p_type
== PT_GNU_RELRO
)
4494 Elf_Internal_Phdr
*lp
;
4496 for (lp
= phdrs
; lp
< phdrs
+ count
; ++lp
)
4498 if (lp
->p_type
== PT_LOAD
4499 && lp
->p_vaddr
<= link_info
->relro_end
4500 && lp
->p_vaddr
>= link_info
->relro_start
4501 && lp
->p_vaddr
+ lp
->p_filesz
4502 >= link_info
->relro_end
)
4506 if (lp
< phdrs
+ count
4507 && link_info
->relro_end
> lp
->p_vaddr
)
4509 p
->p_vaddr
= lp
->p_vaddr
;
4510 p
->p_paddr
= lp
->p_paddr
;
4511 p
->p_offset
= lp
->p_offset
;
4512 p
->p_filesz
= link_info
->relro_end
- lp
->p_vaddr
;
4513 p
->p_memsz
= p
->p_filesz
;
4515 p
->p_flags
= (lp
->p_flags
& ~PF_W
);
4519 memset (p
, 0, sizeof *p
);
4520 p
->p_type
= PT_NULL
;
4526 /* Clear out any program headers we allocated but did not use. */
4527 for (; count
< alloc
; count
++, p
++)
4529 memset (p
, 0, sizeof *p
);
4530 p
->p_type
= PT_NULL
;
4533 elf_tdata (abfd
)->phdr
= phdrs
;
4535 elf_tdata (abfd
)->next_file_pos
= off
;
4537 /* Write out the program headers. */
4538 if (bfd_seek (abfd
, (bfd_signed_vma
) bed
->s
->sizeof_ehdr
, SEEK_SET
) != 0
4539 || bed
->s
->write_out_phdrs (abfd
, phdrs
, alloc
) != 0)
4545 /* Get the size of the program header.
4547 If this is called by the linker before any of the section VMA's are set, it
4548 can't calculate the correct value for a strange memory layout. This only
4549 happens when SIZEOF_HEADERS is used in a linker script. In this case,
4550 SORTED_HDRS is NULL and we assume the normal scenario of one text and one
4551 data segment (exclusive of .interp and .dynamic).
4553 ??? User written scripts must either not use SIZEOF_HEADERS, or assume there
4554 will be two segments. */
4556 static bfd_size_type
4557 get_program_header_size (bfd
*abfd
)
4561 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4563 /* We can't return a different result each time we're called. */
4564 if (elf_tdata (abfd
)->program_header_size
!= 0)
4565 return elf_tdata (abfd
)->program_header_size
;
4567 if (elf_tdata (abfd
)->segment_map
!= NULL
)
4569 struct elf_segment_map
*m
;
4572 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
4574 elf_tdata (abfd
)->program_header_size
= segs
* bed
->s
->sizeof_phdr
;
4575 return elf_tdata (abfd
)->program_header_size
;
4578 /* Assume we will need exactly two PT_LOAD segments: one for text
4579 and one for data. */
4582 s
= bfd_get_section_by_name (abfd
, ".interp");
4583 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0)
4585 /* If we have a loadable interpreter section, we need a
4586 PT_INTERP segment. In this case, assume we also need a
4587 PT_PHDR segment, although that may not be true for all
4592 if (bfd_get_section_by_name (abfd
, ".dynamic") != NULL
)
4594 /* We need a PT_DYNAMIC segment. */
4598 if (elf_tdata (abfd
)->eh_frame_hdr
)
4600 /* We need a PT_GNU_EH_FRAME segment. */
4604 if (elf_tdata (abfd
)->stack_flags
)
4606 /* We need a PT_GNU_STACK segment. */
4610 if (elf_tdata (abfd
)->relro
)
4612 /* We need a PT_GNU_RELRO segment. */
4616 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
4618 if ((s
->flags
& SEC_LOAD
) != 0
4619 && strncmp (s
->name
, ".note", 5) == 0)
4621 /* We need a PT_NOTE segment. */
4626 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
4628 if (s
->flags
& SEC_THREAD_LOCAL
)
4630 /* We need a PT_TLS segment. */
4636 /* Let the backend count up any program headers it might need. */
4637 if (bed
->elf_backend_additional_program_headers
)
4641 a
= (*bed
->elf_backend_additional_program_headers
) (abfd
);
4647 elf_tdata (abfd
)->program_header_size
= segs
* bed
->s
->sizeof_phdr
;
4648 return elf_tdata (abfd
)->program_header_size
;
4651 /* Work out the file positions of all the sections. This is called by
4652 _bfd_elf_compute_section_file_positions. All the section sizes and
4653 VMAs must be known before this is called.
4655 Reloc sections come in two flavours: Those processed specially as
4656 "side-channel" data attached to a section to which they apply, and
4657 those that bfd doesn't process as relocations. The latter sort are
4658 stored in a normal bfd section by bfd_section_from_shdr. We don't
4659 consider the former sort here, unless they form part of the loadable
4660 image. Reloc sections not assigned here will be handled later by
4661 assign_file_positions_for_relocs.
4663 We also don't set the positions of the .symtab and .strtab here. */
4666 assign_file_positions_except_relocs (bfd
*abfd
,
4667 struct bfd_link_info
*link_info
)
4669 struct elf_obj_tdata
* const tdata
= elf_tdata (abfd
);
4670 Elf_Internal_Ehdr
* const i_ehdrp
= elf_elfheader (abfd
);
4671 Elf_Internal_Shdr
** const i_shdrpp
= elf_elfsections (abfd
);
4672 unsigned int num_sec
= elf_numsections (abfd
);
4674 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4676 if ((abfd
->flags
& (EXEC_P
| DYNAMIC
)) == 0
4677 && bfd_get_format (abfd
) != bfd_core
)
4679 Elf_Internal_Shdr
**hdrpp
;
4682 /* Start after the ELF header. */
4683 off
= i_ehdrp
->e_ehsize
;
4685 /* We are not creating an executable, which means that we are
4686 not creating a program header, and that the actual order of
4687 the sections in the file is unimportant. */
4688 for (i
= 1, hdrpp
= i_shdrpp
+ 1; i
< num_sec
; i
++, hdrpp
++)
4690 Elf_Internal_Shdr
*hdr
;
4693 if (((hdr
->sh_type
== SHT_REL
|| hdr
->sh_type
== SHT_RELA
)
4694 && hdr
->bfd_section
== NULL
)
4695 || i
== tdata
->symtab_section
4696 || i
== tdata
->symtab_shndx_section
4697 || i
== tdata
->strtab_section
)
4699 hdr
->sh_offset
= -1;
4702 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
4704 if (i
== SHN_LORESERVE
- 1)
4706 i
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4707 hdrpp
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4714 Elf_Internal_Shdr
**hdrpp
;
4716 /* Assign file positions for the loaded sections based on the
4717 assignment of sections to segments. */
4718 if (! assign_file_positions_for_segments (abfd
, link_info
))
4721 /* Assign file positions for the other sections. */
4723 off
= elf_tdata (abfd
)->next_file_pos
;
4724 for (i
= 1, hdrpp
= i_shdrpp
+ 1; i
< num_sec
; i
++, hdrpp
++)
4726 Elf_Internal_Shdr
*hdr
;
4729 if (hdr
->bfd_section
!= NULL
4730 && hdr
->bfd_section
->filepos
!= 0)
4731 hdr
->sh_offset
= hdr
->bfd_section
->filepos
;
4732 else if ((hdr
->sh_flags
& SHF_ALLOC
) != 0)
4734 ((*_bfd_error_handler
)
4735 (_("%B: warning: allocated section `%s' not in segment"),
4737 (hdr
->bfd_section
== NULL
4739 : hdr
->bfd_section
->name
)));
4740 if ((abfd
->flags
& D_PAGED
) != 0)
4741 off
+= vma_page_aligned_bias (hdr
->sh_addr
, off
,
4744 off
+= vma_page_aligned_bias (hdr
->sh_addr
, off
,
4746 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
,
4749 else if (((hdr
->sh_type
== SHT_REL
|| hdr
->sh_type
== SHT_RELA
)
4750 && hdr
->bfd_section
== NULL
)
4751 || hdr
== i_shdrpp
[tdata
->symtab_section
]
4752 || hdr
== i_shdrpp
[tdata
->symtab_shndx_section
]
4753 || hdr
== i_shdrpp
[tdata
->strtab_section
])
4754 hdr
->sh_offset
= -1;
4756 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
4758 if (i
== SHN_LORESERVE
- 1)
4760 i
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4761 hdrpp
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4766 /* Place the section headers. */
4767 off
= align_file_position (off
, 1 << bed
->s
->log_file_align
);
4768 i_ehdrp
->e_shoff
= off
;
4769 off
+= i_ehdrp
->e_shnum
* i_ehdrp
->e_shentsize
;
4771 elf_tdata (abfd
)->next_file_pos
= off
;
4777 prep_headers (bfd
*abfd
)
4779 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
4780 Elf_Internal_Phdr
*i_phdrp
= 0; /* Program header table, internal form */
4781 Elf_Internal_Shdr
**i_shdrp
; /* Section header table, internal form */
4782 struct elf_strtab_hash
*shstrtab
;
4783 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4785 i_ehdrp
= elf_elfheader (abfd
);
4786 i_shdrp
= elf_elfsections (abfd
);
4788 shstrtab
= _bfd_elf_strtab_init ();
4789 if (shstrtab
== NULL
)
4792 elf_shstrtab (abfd
) = shstrtab
;
4794 i_ehdrp
->e_ident
[EI_MAG0
] = ELFMAG0
;
4795 i_ehdrp
->e_ident
[EI_MAG1
] = ELFMAG1
;
4796 i_ehdrp
->e_ident
[EI_MAG2
] = ELFMAG2
;
4797 i_ehdrp
->e_ident
[EI_MAG3
] = ELFMAG3
;
4799 i_ehdrp
->e_ident
[EI_CLASS
] = bed
->s
->elfclass
;
4800 i_ehdrp
->e_ident
[EI_DATA
] =
4801 bfd_big_endian (abfd
) ? ELFDATA2MSB
: ELFDATA2LSB
;
4802 i_ehdrp
->e_ident
[EI_VERSION
] = bed
->s
->ev_current
;
4804 if ((abfd
->flags
& DYNAMIC
) != 0)
4805 i_ehdrp
->e_type
= ET_DYN
;
4806 else if ((abfd
->flags
& EXEC_P
) != 0)
4807 i_ehdrp
->e_type
= ET_EXEC
;
4808 else if (bfd_get_format (abfd
) == bfd_core
)
4809 i_ehdrp
->e_type
= ET_CORE
;
4811 i_ehdrp
->e_type
= ET_REL
;
4813 switch (bfd_get_arch (abfd
))
4815 case bfd_arch_unknown
:
4816 i_ehdrp
->e_machine
= EM_NONE
;
4819 /* There used to be a long list of cases here, each one setting
4820 e_machine to the same EM_* macro #defined as ELF_MACHINE_CODE
4821 in the corresponding bfd definition. To avoid duplication,
4822 the switch was removed. Machines that need special handling
4823 can generally do it in elf_backend_final_write_processing(),
4824 unless they need the information earlier than the final write.
4825 Such need can generally be supplied by replacing the tests for
4826 e_machine with the conditions used to determine it. */
4828 i_ehdrp
->e_machine
= bed
->elf_machine_code
;
4831 i_ehdrp
->e_version
= bed
->s
->ev_current
;
4832 i_ehdrp
->e_ehsize
= bed
->s
->sizeof_ehdr
;
4834 /* No program header, for now. */
4835 i_ehdrp
->e_phoff
= 0;
4836 i_ehdrp
->e_phentsize
= 0;
4837 i_ehdrp
->e_phnum
= 0;
4839 /* Each bfd section is section header entry. */
4840 i_ehdrp
->e_entry
= bfd_get_start_address (abfd
);
4841 i_ehdrp
->e_shentsize
= bed
->s
->sizeof_shdr
;
4843 /* If we're building an executable, we'll need a program header table. */
4844 if (abfd
->flags
& EXEC_P
)
4845 /* It all happens later. */
4849 i_ehdrp
->e_phentsize
= 0;
4851 i_ehdrp
->e_phoff
= 0;
4854 elf_tdata (abfd
)->symtab_hdr
.sh_name
=
4855 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".symtab", FALSE
);
4856 elf_tdata (abfd
)->strtab_hdr
.sh_name
=
4857 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".strtab", FALSE
);
4858 elf_tdata (abfd
)->shstrtab_hdr
.sh_name
=
4859 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".shstrtab", FALSE
);
4860 if (elf_tdata (abfd
)->symtab_hdr
.sh_name
== (unsigned int) -1
4861 || elf_tdata (abfd
)->symtab_hdr
.sh_name
== (unsigned int) -1
4862 || elf_tdata (abfd
)->shstrtab_hdr
.sh_name
== (unsigned int) -1)
4868 /* Assign file positions for all the reloc sections which are not part
4869 of the loadable file image. */
4872 _bfd_elf_assign_file_positions_for_relocs (bfd
*abfd
)
4875 unsigned int i
, num_sec
;
4876 Elf_Internal_Shdr
**shdrpp
;
4878 off
= elf_tdata (abfd
)->next_file_pos
;
4880 num_sec
= elf_numsections (abfd
);
4881 for (i
= 1, shdrpp
= elf_elfsections (abfd
) + 1; i
< num_sec
; i
++, shdrpp
++)
4883 Elf_Internal_Shdr
*shdrp
;
4886 if ((shdrp
->sh_type
== SHT_REL
|| shdrp
->sh_type
== SHT_RELA
)
4887 && shdrp
->sh_offset
== -1)
4888 off
= _bfd_elf_assign_file_position_for_section (shdrp
, off
, TRUE
);
4891 elf_tdata (abfd
)->next_file_pos
= off
;
4895 _bfd_elf_write_object_contents (bfd
*abfd
)
4897 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4898 Elf_Internal_Ehdr
*i_ehdrp
;
4899 Elf_Internal_Shdr
**i_shdrp
;
4901 unsigned int count
, num_sec
;
4903 if (! abfd
->output_has_begun
4904 && ! _bfd_elf_compute_section_file_positions (abfd
, NULL
))
4907 i_shdrp
= elf_elfsections (abfd
);
4908 i_ehdrp
= elf_elfheader (abfd
);
4911 bfd_map_over_sections (abfd
, bed
->s
->write_relocs
, &failed
);
4915 _bfd_elf_assign_file_positions_for_relocs (abfd
);
4917 /* After writing the headers, we need to write the sections too... */
4918 num_sec
= elf_numsections (abfd
);
4919 for (count
= 1; count
< num_sec
; count
++)
4921 if (bed
->elf_backend_section_processing
)
4922 (*bed
->elf_backend_section_processing
) (abfd
, i_shdrp
[count
]);
4923 if (i_shdrp
[count
]->contents
)
4925 bfd_size_type amt
= i_shdrp
[count
]->sh_size
;
4927 if (bfd_seek (abfd
, i_shdrp
[count
]->sh_offset
, SEEK_SET
) != 0
4928 || bfd_bwrite (i_shdrp
[count
]->contents
, amt
, abfd
) != amt
)
4931 if (count
== SHN_LORESERVE
- 1)
4932 count
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4935 /* Write out the section header names. */
4936 if (elf_shstrtab (abfd
) != NULL
4937 && (bfd_seek (abfd
, elf_tdata (abfd
)->shstrtab_hdr
.sh_offset
, SEEK_SET
) != 0
4938 || ! _bfd_elf_strtab_emit (abfd
, elf_shstrtab (abfd
))))
4941 if (bed
->elf_backend_final_write_processing
)
4942 (*bed
->elf_backend_final_write_processing
) (abfd
,
4943 elf_tdata (abfd
)->linker
);
4945 return bed
->s
->write_shdrs_and_ehdr (abfd
);
4949 _bfd_elf_write_corefile_contents (bfd
*abfd
)
4951 /* Hopefully this can be done just like an object file. */
4952 return _bfd_elf_write_object_contents (abfd
);
4955 /* Given a section, search the header to find them. */
4958 _bfd_elf_section_from_bfd_section (bfd
*abfd
, struct bfd_section
*asect
)
4960 const struct elf_backend_data
*bed
;
4963 if (elf_section_data (asect
) != NULL
4964 && elf_section_data (asect
)->this_idx
!= 0)
4965 return elf_section_data (asect
)->this_idx
;
4967 if (bfd_is_abs_section (asect
))
4969 else if (bfd_is_com_section (asect
))
4971 else if (bfd_is_und_section (asect
))
4976 bed
= get_elf_backend_data (abfd
);
4977 if (bed
->elf_backend_section_from_bfd_section
)
4981 if ((*bed
->elf_backend_section_from_bfd_section
) (abfd
, asect
, &retval
))
4986 bfd_set_error (bfd_error_nonrepresentable_section
);
4991 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
4995 _bfd_elf_symbol_from_bfd_symbol (bfd
*abfd
, asymbol
**asym_ptr_ptr
)
4997 asymbol
*asym_ptr
= *asym_ptr_ptr
;
4999 flagword flags
= asym_ptr
->flags
;
5001 /* When gas creates relocations against local labels, it creates its
5002 own symbol for the section, but does put the symbol into the
5003 symbol chain, so udata is 0. When the linker is generating
5004 relocatable output, this section symbol may be for one of the
5005 input sections rather than the output section. */
5006 if (asym_ptr
->udata
.i
== 0
5007 && (flags
& BSF_SECTION_SYM
)
5008 && asym_ptr
->section
)
5012 if (asym_ptr
->section
->output_section
!= NULL
)
5013 indx
= asym_ptr
->section
->output_section
->index
;
5015 indx
= asym_ptr
->section
->index
;
5016 if (indx
< elf_num_section_syms (abfd
)
5017 && elf_section_syms (abfd
)[indx
] != NULL
)
5018 asym_ptr
->udata
.i
= elf_section_syms (abfd
)[indx
]->udata
.i
;
5021 idx
= asym_ptr
->udata
.i
;
5025 /* This case can occur when using --strip-symbol on a symbol
5026 which is used in a relocation entry. */
5027 (*_bfd_error_handler
)
5028 (_("%B: symbol `%s' required but not present"),
5029 abfd
, bfd_asymbol_name (asym_ptr
));
5030 bfd_set_error (bfd_error_no_symbols
);
5037 "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n",
5038 (long) asym_ptr
, asym_ptr
->name
, idx
, flags
,
5039 elf_symbol_flags (flags
));
5047 /* Copy private BFD data. This copies any program header information. */
5050 copy_private_bfd_data (bfd
*ibfd
, bfd
*obfd
)
5052 Elf_Internal_Ehdr
*iehdr
;
5053 struct elf_segment_map
*map
;
5054 struct elf_segment_map
*map_first
;
5055 struct elf_segment_map
**pointer_to_map
;
5056 Elf_Internal_Phdr
*segment
;
5059 unsigned int num_segments
;
5060 bfd_boolean phdr_included
= FALSE
;
5061 bfd_vma maxpagesize
;
5062 struct elf_segment_map
*phdr_adjust_seg
= NULL
;
5063 unsigned int phdr_adjust_num
= 0;
5064 const struct elf_backend_data
*bed
;
5066 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
5067 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
5070 if (elf_tdata (ibfd
)->phdr
== NULL
)
5073 bed
= get_elf_backend_data (ibfd
);
5074 iehdr
= elf_elfheader (ibfd
);
5077 pointer_to_map
= &map_first
;
5079 num_segments
= elf_elfheader (ibfd
)->e_phnum
;
5080 maxpagesize
= get_elf_backend_data (obfd
)->maxpagesize
;
5082 /* Returns the end address of the segment + 1. */
5083 #define SEGMENT_END(segment, start) \
5084 (start + (segment->p_memsz > segment->p_filesz \
5085 ? segment->p_memsz : segment->p_filesz))
5087 #define SECTION_SIZE(section, segment) \
5088 (((section->flags & (SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) \
5089 != SEC_THREAD_LOCAL || segment->p_type == PT_TLS) \
5090 ? section->size : 0)
5092 /* Returns TRUE if the given section is contained within
5093 the given segment. VMA addresses are compared. */
5094 #define IS_CONTAINED_BY_VMA(section, segment) \
5095 (section->vma >= segment->p_vaddr \
5096 && (section->vma + SECTION_SIZE (section, segment) \
5097 <= (SEGMENT_END (segment, segment->p_vaddr))))
5099 /* Returns TRUE if the given section is contained within
5100 the given segment. LMA addresses are compared. */
5101 #define IS_CONTAINED_BY_LMA(section, segment, base) \
5102 (section->lma >= base \
5103 && (section->lma + SECTION_SIZE (section, segment) \
5104 <= SEGMENT_END (segment, base)))
5106 /* Special case: corefile "NOTE" section containing regs, prpsinfo etc. */
5107 #define IS_COREFILE_NOTE(p, s) \
5108 (p->p_type == PT_NOTE \
5109 && bfd_get_format (ibfd) == bfd_core \
5110 && s->vma == 0 && s->lma == 0 \
5111 && (bfd_vma) s->filepos >= p->p_offset \
5112 && ((bfd_vma) s->filepos + s->size \
5113 <= p->p_offset + p->p_filesz))
5115 /* The complicated case when p_vaddr is 0 is to handle the Solaris
5116 linker, which generates a PT_INTERP section with p_vaddr and
5117 p_memsz set to 0. */
5118 #define IS_SOLARIS_PT_INTERP(p, s) \
5120 && p->p_paddr == 0 \
5121 && p->p_memsz == 0 \
5122 && p->p_filesz > 0 \
5123 && (s->flags & SEC_HAS_CONTENTS) != 0 \
5125 && (bfd_vma) s->filepos >= p->p_offset \
5126 && ((bfd_vma) s->filepos + s->size \
5127 <= p->p_offset + p->p_filesz))
5129 /* Decide if the given section should be included in the given segment.
5130 A section will be included if:
5131 1. It is within the address space of the segment -- we use the LMA
5132 if that is set for the segment and the VMA otherwise,
5133 2. It is an allocated segment,
5134 3. There is an output section associated with it,
5135 4. The section has not already been allocated to a previous segment.
5136 5. PT_GNU_STACK segments do not include any sections.
5137 6. PT_TLS segment includes only SHF_TLS sections.
5138 7. SHF_TLS sections are only in PT_TLS or PT_LOAD segments.
5139 8. PT_DYNAMIC should not contain empty sections at the beginning
5140 (with the possible exception of .dynamic). */
5141 #define INCLUDE_SECTION_IN_SEGMENT(section, segment, bed) \
5142 ((((segment->p_paddr \
5143 ? IS_CONTAINED_BY_LMA (section, segment, segment->p_paddr) \
5144 : IS_CONTAINED_BY_VMA (section, segment)) \
5145 && (section->flags & SEC_ALLOC) != 0) \
5146 || IS_COREFILE_NOTE (segment, section)) \
5147 && section->output_section != NULL \
5148 && segment->p_type != PT_GNU_STACK \
5149 && (segment->p_type != PT_TLS \
5150 || (section->flags & SEC_THREAD_LOCAL)) \
5151 && (segment->p_type == PT_LOAD \
5152 || segment->p_type == PT_TLS \
5153 || (section->flags & SEC_THREAD_LOCAL) == 0) \
5154 && (segment->p_type != PT_DYNAMIC \
5155 || SECTION_SIZE (section, segment) > 0 \
5156 || (segment->p_paddr \
5157 ? segment->p_paddr != section->lma \
5158 : segment->p_vaddr != section->vma) \
5159 || (strcmp (bfd_get_section_name (ibfd, section), ".dynamic") \
5161 && ! section->segment_mark)
5163 /* Returns TRUE iff seg1 starts after the end of seg2. */
5164 #define SEGMENT_AFTER_SEGMENT(seg1, seg2, field) \
5165 (seg1->field >= SEGMENT_END (seg2, seg2->field))
5167 /* Returns TRUE iff seg1 and seg2 overlap. Segments overlap iff both
5168 their VMA address ranges and their LMA address ranges overlap.
5169 It is possible to have overlapping VMA ranges without overlapping LMA
5170 ranges. RedBoot images for example can have both .data and .bss mapped
5171 to the same VMA range, but with the .data section mapped to a different
5173 #define SEGMENT_OVERLAPS(seg1, seg2) \
5174 ( !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_vaddr) \
5175 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_vaddr)) \
5176 && !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_paddr) \
5177 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_paddr)))
5179 /* Initialise the segment mark field. */
5180 for (section
= ibfd
->sections
; section
!= NULL
; section
= section
->next
)
5181 section
->segment_mark
= FALSE
;
5183 /* Scan through the segments specified in the program header
5184 of the input BFD. For this first scan we look for overlaps
5185 in the loadable segments. These can be created by weird
5186 parameters to objcopy. Also, fix some solaris weirdness. */
5187 for (i
= 0, segment
= elf_tdata (ibfd
)->phdr
;
5192 Elf_Internal_Phdr
*segment2
;
5194 if (segment
->p_type
== PT_INTERP
)
5195 for (section
= ibfd
->sections
; section
; section
= section
->next
)
5196 if (IS_SOLARIS_PT_INTERP (segment
, section
))
5198 /* Mininal change so that the normal section to segment
5199 assignment code will work. */
5200 segment
->p_vaddr
= section
->vma
;
5204 if (segment
->p_type
!= PT_LOAD
)
5207 /* Determine if this segment overlaps any previous segments. */
5208 for (j
= 0, segment2
= elf_tdata (ibfd
)->phdr
; j
< i
; j
++, segment2
++)
5210 bfd_signed_vma extra_length
;
5212 if (segment2
->p_type
!= PT_LOAD
5213 || ! SEGMENT_OVERLAPS (segment
, segment2
))
5216 /* Merge the two segments together. */
5217 if (segment2
->p_vaddr
< segment
->p_vaddr
)
5219 /* Extend SEGMENT2 to include SEGMENT and then delete
5222 SEGMENT_END (segment
, segment
->p_vaddr
)
5223 - SEGMENT_END (segment2
, segment2
->p_vaddr
);
5225 if (extra_length
> 0)
5227 segment2
->p_memsz
+= extra_length
;
5228 segment2
->p_filesz
+= extra_length
;
5231 segment
->p_type
= PT_NULL
;
5233 /* Since we have deleted P we must restart the outer loop. */
5235 segment
= elf_tdata (ibfd
)->phdr
;
5240 /* Extend SEGMENT to include SEGMENT2 and then delete
5243 SEGMENT_END (segment2
, segment2
->p_vaddr
)
5244 - SEGMENT_END (segment
, segment
->p_vaddr
);
5246 if (extra_length
> 0)
5248 segment
->p_memsz
+= extra_length
;
5249 segment
->p_filesz
+= extra_length
;
5252 segment2
->p_type
= PT_NULL
;
5257 /* The second scan attempts to assign sections to segments. */
5258 for (i
= 0, segment
= elf_tdata (ibfd
)->phdr
;
5262 unsigned int section_count
;
5263 asection
** sections
;
5264 asection
* output_section
;
5266 bfd_vma matching_lma
;
5267 bfd_vma suggested_lma
;
5271 if (segment
->p_type
== PT_NULL
)
5274 /* Compute how many sections might be placed into this segment. */
5275 for (section
= ibfd
->sections
, section_count
= 0;
5277 section
= section
->next
)
5278 if (INCLUDE_SECTION_IN_SEGMENT (section
, segment
, bed
))
5281 /* Allocate a segment map big enough to contain
5282 all of the sections we have selected. */
5283 amt
= sizeof (struct elf_segment_map
);
5284 amt
+= ((bfd_size_type
) section_count
- 1) * sizeof (asection
*);
5285 map
= bfd_alloc (obfd
, amt
);
5289 /* Initialise the fields of the segment map. Default to
5290 using the physical address of the segment in the input BFD. */
5292 map
->p_type
= segment
->p_type
;
5293 map
->p_flags
= segment
->p_flags
;
5294 map
->p_flags_valid
= 1;
5295 map
->p_paddr
= segment
->p_paddr
;
5296 map
->p_paddr_valid
= 1;
5298 /* Determine if this segment contains the ELF file header
5299 and if it contains the program headers themselves. */
5300 map
->includes_filehdr
= (segment
->p_offset
== 0
5301 && segment
->p_filesz
>= iehdr
->e_ehsize
);
5303 map
->includes_phdrs
= 0;
5305 if (! phdr_included
|| segment
->p_type
!= PT_LOAD
)
5307 map
->includes_phdrs
=
5308 (segment
->p_offset
<= (bfd_vma
) iehdr
->e_phoff
5309 && (segment
->p_offset
+ segment
->p_filesz
5310 >= ((bfd_vma
) iehdr
->e_phoff
5311 + iehdr
->e_phnum
* iehdr
->e_phentsize
)));
5313 if (segment
->p_type
== PT_LOAD
&& map
->includes_phdrs
)
5314 phdr_included
= TRUE
;
5317 if (section_count
== 0)
5319 /* Special segments, such as the PT_PHDR segment, may contain
5320 no sections, but ordinary, loadable segments should contain
5321 something. They are allowed by the ELF spec however, so only
5322 a warning is produced. */
5323 if (segment
->p_type
== PT_LOAD
)
5324 (*_bfd_error_handler
)
5325 (_("%B: warning: Empty loadable segment detected, is this intentional ?\n"),
5329 *pointer_to_map
= map
;
5330 pointer_to_map
= &map
->next
;
5335 /* Now scan the sections in the input BFD again and attempt
5336 to add their corresponding output sections to the segment map.
5337 The problem here is how to handle an output section which has
5338 been moved (ie had its LMA changed). There are four possibilities:
5340 1. None of the sections have been moved.
5341 In this case we can continue to use the segment LMA from the
5344 2. All of the sections have been moved by the same amount.
5345 In this case we can change the segment's LMA to match the LMA
5346 of the first section.
5348 3. Some of the sections have been moved, others have not.
5349 In this case those sections which have not been moved can be
5350 placed in the current segment which will have to have its size,
5351 and possibly its LMA changed, and a new segment or segments will
5352 have to be created to contain the other sections.
5354 4. The sections have been moved, but not by the same amount.
5355 In this case we can change the segment's LMA to match the LMA
5356 of the first section and we will have to create a new segment
5357 or segments to contain the other sections.
5359 In order to save time, we allocate an array to hold the section
5360 pointers that we are interested in. As these sections get assigned
5361 to a segment, they are removed from this array. */
5363 /* Gcc 2.96 miscompiles this code on mips. Don't do casting here
5364 to work around this long long bug. */
5365 sections
= bfd_malloc2 (section_count
, sizeof (asection
*));
5366 if (sections
== NULL
)
5369 /* Step One: Scan for segment vs section LMA conflicts.
5370 Also add the sections to the section array allocated above.
5371 Also add the sections to the current segment. In the common
5372 case, where the sections have not been moved, this means that
5373 we have completely filled the segment, and there is nothing
5379 for (j
= 0, section
= ibfd
->sections
;
5381 section
= section
->next
)
5383 if (INCLUDE_SECTION_IN_SEGMENT (section
, segment
, bed
))
5385 output_section
= section
->output_section
;
5387 sections
[j
++] = section
;
5389 /* The Solaris native linker always sets p_paddr to 0.
5390 We try to catch that case here, and set it to the
5391 correct value. Note - some backends require that
5392 p_paddr be left as zero. */
5393 if (segment
->p_paddr
== 0
5394 && segment
->p_vaddr
!= 0
5395 && (! bed
->want_p_paddr_set_to_zero
)
5397 && output_section
->lma
!= 0
5398 && (output_section
->vma
== (segment
->p_vaddr
5399 + (map
->includes_filehdr
5402 + (map
->includes_phdrs
5404 * iehdr
->e_phentsize
)
5406 map
->p_paddr
= segment
->p_vaddr
;
5408 /* Match up the physical address of the segment with the
5409 LMA address of the output section. */
5410 if (IS_CONTAINED_BY_LMA (output_section
, segment
, map
->p_paddr
)
5411 || IS_COREFILE_NOTE (segment
, section
)
5412 || (bed
->want_p_paddr_set_to_zero
&&
5413 IS_CONTAINED_BY_VMA (output_section
, segment
))
5416 if (matching_lma
== 0)
5417 matching_lma
= output_section
->lma
;
5419 /* We assume that if the section fits within the segment
5420 then it does not overlap any other section within that
5422 map
->sections
[isec
++] = output_section
;
5424 else if (suggested_lma
== 0)
5425 suggested_lma
= output_section
->lma
;
5429 BFD_ASSERT (j
== section_count
);
5431 /* Step Two: Adjust the physical address of the current segment,
5433 if (isec
== section_count
)
5435 /* All of the sections fitted within the segment as currently
5436 specified. This is the default case. Add the segment to
5437 the list of built segments and carry on to process the next
5438 program header in the input BFD. */
5439 map
->count
= section_count
;
5440 *pointer_to_map
= map
;
5441 pointer_to_map
= &map
->next
;
5448 if (matching_lma
!= 0)
5450 /* At least one section fits inside the current segment.
5451 Keep it, but modify its physical address to match the
5452 LMA of the first section that fitted. */
5453 map
->p_paddr
= matching_lma
;
5457 /* None of the sections fitted inside the current segment.
5458 Change the current segment's physical address to match
5459 the LMA of the first section. */
5460 map
->p_paddr
= suggested_lma
;
5463 /* Offset the segment physical address from the lma
5464 to allow for space taken up by elf headers. */
5465 if (map
->includes_filehdr
)
5466 map
->p_paddr
-= iehdr
->e_ehsize
;
5468 if (map
->includes_phdrs
)
5470 map
->p_paddr
-= iehdr
->e_phnum
* iehdr
->e_phentsize
;
5472 /* iehdr->e_phnum is just an estimate of the number
5473 of program headers that we will need. Make a note
5474 here of the number we used and the segment we chose
5475 to hold these headers, so that we can adjust the
5476 offset when we know the correct value. */
5477 phdr_adjust_num
= iehdr
->e_phnum
;
5478 phdr_adjust_seg
= map
;
5482 /* Step Three: Loop over the sections again, this time assigning
5483 those that fit to the current segment and removing them from the
5484 sections array; but making sure not to leave large gaps. Once all
5485 possible sections have been assigned to the current segment it is
5486 added to the list of built segments and if sections still remain
5487 to be assigned, a new segment is constructed before repeating
5495 /* Fill the current segment with sections that fit. */
5496 for (j
= 0; j
< section_count
; j
++)
5498 section
= sections
[j
];
5500 if (section
== NULL
)
5503 output_section
= section
->output_section
;
5505 BFD_ASSERT (output_section
!= NULL
);
5507 if (IS_CONTAINED_BY_LMA (output_section
, segment
, map
->p_paddr
)
5508 || IS_COREFILE_NOTE (segment
, section
))
5510 if (map
->count
== 0)
5512 /* If the first section in a segment does not start at
5513 the beginning of the segment, then something is
5515 if (output_section
->lma
!=
5517 + (map
->includes_filehdr
? iehdr
->e_ehsize
: 0)
5518 + (map
->includes_phdrs
5519 ? iehdr
->e_phnum
* iehdr
->e_phentsize
5525 asection
* prev_sec
;
5527 prev_sec
= map
->sections
[map
->count
- 1];
5529 /* If the gap between the end of the previous section
5530 and the start of this section is more than
5531 maxpagesize then we need to start a new segment. */
5532 if ((BFD_ALIGN (prev_sec
->lma
+ prev_sec
->size
,
5534 < BFD_ALIGN (output_section
->lma
, maxpagesize
))
5535 || ((prev_sec
->lma
+ prev_sec
->size
)
5536 > output_section
->lma
))
5538 if (suggested_lma
== 0)
5539 suggested_lma
= output_section
->lma
;
5545 map
->sections
[map
->count
++] = output_section
;
5548 section
->segment_mark
= TRUE
;
5550 else if (suggested_lma
== 0)
5551 suggested_lma
= output_section
->lma
;
5554 BFD_ASSERT (map
->count
> 0);
5556 /* Add the current segment to the list of built segments. */
5557 *pointer_to_map
= map
;
5558 pointer_to_map
= &map
->next
;
5560 if (isec
< section_count
)
5562 /* We still have not allocated all of the sections to
5563 segments. Create a new segment here, initialise it
5564 and carry on looping. */
5565 amt
= sizeof (struct elf_segment_map
);
5566 amt
+= ((bfd_size_type
) section_count
- 1) * sizeof (asection
*);
5567 map
= bfd_alloc (obfd
, amt
);
5574 /* Initialise the fields of the segment map. Set the physical
5575 physical address to the LMA of the first section that has
5576 not yet been assigned. */
5578 map
->p_type
= segment
->p_type
;
5579 map
->p_flags
= segment
->p_flags
;
5580 map
->p_flags_valid
= 1;
5581 map
->p_paddr
= suggested_lma
;
5582 map
->p_paddr_valid
= 1;
5583 map
->includes_filehdr
= 0;
5584 map
->includes_phdrs
= 0;
5587 while (isec
< section_count
);
5592 /* The Solaris linker creates program headers in which all the
5593 p_paddr fields are zero. When we try to objcopy or strip such a
5594 file, we get confused. Check for this case, and if we find it
5595 reset the p_paddr_valid fields. */
5596 for (map
= map_first
; map
!= NULL
; map
= map
->next
)
5597 if (map
->p_paddr
!= 0)
5600 for (map
= map_first
; map
!= NULL
; map
= map
->next
)
5601 map
->p_paddr_valid
= 0;
5603 elf_tdata (obfd
)->segment_map
= map_first
;
5605 /* If we had to estimate the number of program headers that were
5606 going to be needed, then check our estimate now and adjust
5607 the offset if necessary. */
5608 if (phdr_adjust_seg
!= NULL
)
5612 for (count
= 0, map
= map_first
; map
!= NULL
; map
= map
->next
)
5615 if (count
> phdr_adjust_num
)
5616 phdr_adjust_seg
->p_paddr
5617 -= (count
- phdr_adjust_num
) * iehdr
->e_phentsize
;
5622 #undef IS_CONTAINED_BY_VMA
5623 #undef IS_CONTAINED_BY_LMA
5624 #undef IS_COREFILE_NOTE
5625 #undef IS_SOLARIS_PT_INTERP
5626 #undef INCLUDE_SECTION_IN_SEGMENT
5627 #undef SEGMENT_AFTER_SEGMENT
5628 #undef SEGMENT_OVERLAPS
5632 /* Initialize private output section information from input section. */
5635 _bfd_elf_init_private_section_data (bfd
*ibfd
,
5639 struct bfd_link_info
*link_info
)
5642 Elf_Internal_Shdr
*ihdr
, *ohdr
;
5643 bfd_boolean need_group
= link_info
== NULL
|| link_info
->relocatable
;
5645 if (ibfd
->xvec
->flavour
!= bfd_target_elf_flavour
5646 || obfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
5649 /* FIXME: What if the output ELF section type has been set to
5650 something different? */
5651 if (elf_section_type (osec
) == SHT_NULL
)
5652 elf_section_type (osec
) = elf_section_type (isec
);
5654 /* Set things up for objcopy and relocatable link. The output
5655 SHT_GROUP section will have its elf_next_in_group pointing back
5656 to the input group members. Ignore linker created group section.
5657 See elfNN_ia64_object_p in elfxx-ia64.c. */
5661 if (elf_sec_group (isec
) == NULL
5662 || (elf_sec_group (isec
)->flags
& SEC_LINKER_CREATED
) == 0)
5664 if (elf_section_flags (isec
) & SHF_GROUP
)
5665 elf_section_flags (osec
) |= SHF_GROUP
;
5666 elf_next_in_group (osec
) = elf_next_in_group (isec
);
5667 elf_group_name (osec
) = elf_group_name (isec
);
5671 ihdr
= &elf_section_data (isec
)->this_hdr
;
5673 /* We need to handle elf_linked_to_section for SHF_LINK_ORDER. We
5674 don't use the output section of the linked-to section since it
5675 may be NULL at this point. */
5676 if ((ihdr
->sh_flags
& SHF_LINK_ORDER
) != 0)
5678 ohdr
= &elf_section_data (osec
)->this_hdr
;
5679 ohdr
->sh_flags
|= SHF_LINK_ORDER
;
5680 elf_linked_to_section (osec
) = elf_linked_to_section (isec
);
5683 osec
->use_rela_p
= isec
->use_rela_p
;
5688 /* Copy private section information. This copies over the entsize
5689 field, and sometimes the info field. */
5692 _bfd_elf_copy_private_section_data (bfd
*ibfd
,
5697 Elf_Internal_Shdr
*ihdr
, *ohdr
;
5699 if (ibfd
->xvec
->flavour
!= bfd_target_elf_flavour
5700 || obfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
5703 ihdr
= &elf_section_data (isec
)->this_hdr
;
5704 ohdr
= &elf_section_data (osec
)->this_hdr
;
5706 ohdr
->sh_entsize
= ihdr
->sh_entsize
;
5708 if (ihdr
->sh_type
== SHT_SYMTAB
5709 || ihdr
->sh_type
== SHT_DYNSYM
5710 || ihdr
->sh_type
== SHT_GNU_verneed
5711 || ihdr
->sh_type
== SHT_GNU_verdef
)
5712 ohdr
->sh_info
= ihdr
->sh_info
;
5714 return _bfd_elf_init_private_section_data (ibfd
, isec
, obfd
, osec
,
5718 /* Copy private header information. */
5721 _bfd_elf_copy_private_header_data (bfd
*ibfd
, bfd
*obfd
)
5723 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
5724 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
5727 /* Copy over private BFD data if it has not already been copied.
5728 This must be done here, rather than in the copy_private_bfd_data
5729 entry point, because the latter is called after the section
5730 contents have been set, which means that the program headers have
5731 already been worked out. */
5732 if (elf_tdata (obfd
)->segment_map
== NULL
&& elf_tdata (ibfd
)->phdr
!= NULL
)
5734 if (! copy_private_bfd_data (ibfd
, obfd
))
5741 /* Copy private symbol information. If this symbol is in a section
5742 which we did not map into a BFD section, try to map the section
5743 index correctly. We use special macro definitions for the mapped
5744 section indices; these definitions are interpreted by the
5745 swap_out_syms function. */
5747 #define MAP_ONESYMTAB (SHN_HIOS + 1)
5748 #define MAP_DYNSYMTAB (SHN_HIOS + 2)
5749 #define MAP_STRTAB (SHN_HIOS + 3)
5750 #define MAP_SHSTRTAB (SHN_HIOS + 4)
5751 #define MAP_SYM_SHNDX (SHN_HIOS + 5)
5754 _bfd_elf_copy_private_symbol_data (bfd
*ibfd
,
5759 elf_symbol_type
*isym
, *osym
;
5761 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
5762 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
5765 isym
= elf_symbol_from (ibfd
, isymarg
);
5766 osym
= elf_symbol_from (obfd
, osymarg
);
5770 && bfd_is_abs_section (isym
->symbol
.section
))
5774 shndx
= isym
->internal_elf_sym
.st_shndx
;
5775 if (shndx
== elf_onesymtab (ibfd
))
5776 shndx
= MAP_ONESYMTAB
;
5777 else if (shndx
== elf_dynsymtab (ibfd
))
5778 shndx
= MAP_DYNSYMTAB
;
5779 else if (shndx
== elf_tdata (ibfd
)->strtab_section
)
5781 else if (shndx
== elf_tdata (ibfd
)->shstrtab_section
)
5782 shndx
= MAP_SHSTRTAB
;
5783 else if (shndx
== elf_tdata (ibfd
)->symtab_shndx_section
)
5784 shndx
= MAP_SYM_SHNDX
;
5785 osym
->internal_elf_sym
.st_shndx
= shndx
;
5791 /* Swap out the symbols. */
5794 swap_out_syms (bfd
*abfd
,
5795 struct bfd_strtab_hash
**sttp
,
5798 const struct elf_backend_data
*bed
;
5801 struct bfd_strtab_hash
*stt
;
5802 Elf_Internal_Shdr
*symtab_hdr
;
5803 Elf_Internal_Shdr
*symtab_shndx_hdr
;
5804 Elf_Internal_Shdr
*symstrtab_hdr
;
5805 bfd_byte
*outbound_syms
;
5806 bfd_byte
*outbound_shndx
;
5809 bfd_boolean name_local_sections
;
5811 if (!elf_map_symbols (abfd
))
5814 /* Dump out the symtabs. */
5815 stt
= _bfd_elf_stringtab_init ();
5819 bed
= get_elf_backend_data (abfd
);
5820 symcount
= bfd_get_symcount (abfd
);
5821 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
5822 symtab_hdr
->sh_type
= SHT_SYMTAB
;
5823 symtab_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
5824 symtab_hdr
->sh_size
= symtab_hdr
->sh_entsize
* (symcount
+ 1);
5825 symtab_hdr
->sh_info
= elf_num_locals (abfd
) + 1;
5826 symtab_hdr
->sh_addralign
= 1 << bed
->s
->log_file_align
;
5828 symstrtab_hdr
= &elf_tdata (abfd
)->strtab_hdr
;
5829 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
5831 outbound_syms
= bfd_alloc2 (abfd
, 1 + symcount
, bed
->s
->sizeof_sym
);
5832 if (outbound_syms
== NULL
)
5834 _bfd_stringtab_free (stt
);
5837 symtab_hdr
->contents
= outbound_syms
;
5839 outbound_shndx
= NULL
;
5840 symtab_shndx_hdr
= &elf_tdata (abfd
)->symtab_shndx_hdr
;
5841 if (symtab_shndx_hdr
->sh_name
!= 0)
5843 amt
= (bfd_size_type
) (1 + symcount
) * sizeof (Elf_External_Sym_Shndx
);
5844 outbound_shndx
= bfd_zalloc2 (abfd
, 1 + symcount
,
5845 sizeof (Elf_External_Sym_Shndx
));
5846 if (outbound_shndx
== NULL
)
5848 _bfd_stringtab_free (stt
);
5852 symtab_shndx_hdr
->contents
= outbound_shndx
;
5853 symtab_shndx_hdr
->sh_type
= SHT_SYMTAB_SHNDX
;
5854 symtab_shndx_hdr
->sh_size
= amt
;
5855 symtab_shndx_hdr
->sh_addralign
= sizeof (Elf_External_Sym_Shndx
);
5856 symtab_shndx_hdr
->sh_entsize
= sizeof (Elf_External_Sym_Shndx
);
5859 /* Now generate the data (for "contents"). */
5861 /* Fill in zeroth symbol and swap it out. */
5862 Elf_Internal_Sym sym
;
5868 sym
.st_shndx
= SHN_UNDEF
;
5869 bed
->s
->swap_symbol_out (abfd
, &sym
, outbound_syms
, outbound_shndx
);
5870 outbound_syms
+= bed
->s
->sizeof_sym
;
5871 if (outbound_shndx
!= NULL
)
5872 outbound_shndx
+= sizeof (Elf_External_Sym_Shndx
);
5876 = (bed
->elf_backend_name_local_section_symbols
5877 && bed
->elf_backend_name_local_section_symbols (abfd
));
5879 syms
= bfd_get_outsymbols (abfd
);
5880 for (idx
= 0; idx
< symcount
; idx
++)
5882 Elf_Internal_Sym sym
;
5883 bfd_vma value
= syms
[idx
]->value
;
5884 elf_symbol_type
*type_ptr
;
5885 flagword flags
= syms
[idx
]->flags
;
5888 if (!name_local_sections
5889 && (flags
& (BSF_SECTION_SYM
| BSF_GLOBAL
)) == BSF_SECTION_SYM
)
5891 /* Local section symbols have no name. */
5896 sym
.st_name
= (unsigned long) _bfd_stringtab_add (stt
,
5899 if (sym
.st_name
== (unsigned long) -1)
5901 _bfd_stringtab_free (stt
);
5906 type_ptr
= elf_symbol_from (abfd
, syms
[idx
]);
5908 if ((flags
& BSF_SECTION_SYM
) == 0
5909 && bfd_is_com_section (syms
[idx
]->section
))
5911 /* ELF common symbols put the alignment into the `value' field,
5912 and the size into the `size' field. This is backwards from
5913 how BFD handles it, so reverse it here. */
5914 sym
.st_size
= value
;
5915 if (type_ptr
== NULL
5916 || type_ptr
->internal_elf_sym
.st_value
== 0)
5917 sym
.st_value
= value
>= 16 ? 16 : (1 << bfd_log2 (value
));
5919 sym
.st_value
= type_ptr
->internal_elf_sym
.st_value
;
5920 sym
.st_shndx
= _bfd_elf_section_from_bfd_section
5921 (abfd
, syms
[idx
]->section
);
5925 asection
*sec
= syms
[idx
]->section
;
5928 if (sec
->output_section
)
5930 value
+= sec
->output_offset
;
5931 sec
= sec
->output_section
;
5934 /* Don't add in the section vma for relocatable output. */
5935 if (! relocatable_p
)
5937 sym
.st_value
= value
;
5938 sym
.st_size
= type_ptr
? type_ptr
->internal_elf_sym
.st_size
: 0;
5940 if (bfd_is_abs_section (sec
)
5942 && type_ptr
->internal_elf_sym
.st_shndx
!= 0)
5944 /* This symbol is in a real ELF section which we did
5945 not create as a BFD section. Undo the mapping done
5946 by copy_private_symbol_data. */
5947 shndx
= type_ptr
->internal_elf_sym
.st_shndx
;
5951 shndx
= elf_onesymtab (abfd
);
5954 shndx
= elf_dynsymtab (abfd
);
5957 shndx
= elf_tdata (abfd
)->strtab_section
;
5960 shndx
= elf_tdata (abfd
)->shstrtab_section
;
5963 shndx
= elf_tdata (abfd
)->symtab_shndx_section
;
5971 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec
);
5977 /* Writing this would be a hell of a lot easier if
5978 we had some decent documentation on bfd, and
5979 knew what to expect of the library, and what to
5980 demand of applications. For example, it
5981 appears that `objcopy' might not set the
5982 section of a symbol to be a section that is
5983 actually in the output file. */
5984 sec2
= bfd_get_section_by_name (abfd
, sec
->name
);
5987 _bfd_error_handler (_("\
5988 Unable to find equivalent output section for symbol '%s' from section '%s'"),
5989 syms
[idx
]->name
? syms
[idx
]->name
: "<Local sym>",
5991 bfd_set_error (bfd_error_invalid_operation
);
5992 _bfd_stringtab_free (stt
);
5996 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec2
);
5997 BFD_ASSERT (shndx
!= -1);
6001 sym
.st_shndx
= shndx
;
6004 if ((flags
& BSF_THREAD_LOCAL
) != 0)
6006 else if ((flags
& BSF_FUNCTION
) != 0)
6008 else if ((flags
& BSF_OBJECT
) != 0)
6013 if (syms
[idx
]->section
->flags
& SEC_THREAD_LOCAL
)
6016 /* Processor-specific types. */
6017 if (type_ptr
!= NULL
6018 && bed
->elf_backend_get_symbol_type
)
6019 type
= ((*bed
->elf_backend_get_symbol_type
)
6020 (&type_ptr
->internal_elf_sym
, type
));
6022 if (flags
& BSF_SECTION_SYM
)
6024 if (flags
& BSF_GLOBAL
)
6025 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, STT_SECTION
);
6027 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_SECTION
);
6029 else if (bfd_is_com_section (syms
[idx
]->section
))
6030 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, type
);
6031 else if (bfd_is_und_section (syms
[idx
]->section
))
6032 sym
.st_info
= ELF_ST_INFO (((flags
& BSF_WEAK
)
6036 else if (flags
& BSF_FILE
)
6037 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FILE
);
6040 int bind
= STB_LOCAL
;
6042 if (flags
& BSF_LOCAL
)
6044 else if (flags
& BSF_WEAK
)
6046 else if (flags
& BSF_GLOBAL
)
6049 sym
.st_info
= ELF_ST_INFO (bind
, type
);
6052 if (type_ptr
!= NULL
)
6053 sym
.st_other
= type_ptr
->internal_elf_sym
.st_other
;
6057 bed
->s
->swap_symbol_out (abfd
, &sym
, outbound_syms
, outbound_shndx
);
6058 outbound_syms
+= bed
->s
->sizeof_sym
;
6059 if (outbound_shndx
!= NULL
)
6060 outbound_shndx
+= sizeof (Elf_External_Sym_Shndx
);
6064 symstrtab_hdr
->sh_size
= _bfd_stringtab_size (stt
);
6065 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
6067 symstrtab_hdr
->sh_flags
= 0;
6068 symstrtab_hdr
->sh_addr
= 0;
6069 symstrtab_hdr
->sh_entsize
= 0;
6070 symstrtab_hdr
->sh_link
= 0;
6071 symstrtab_hdr
->sh_info
= 0;
6072 symstrtab_hdr
->sh_addralign
= 1;
6077 /* Return the number of bytes required to hold the symtab vector.
6079 Note that we base it on the count plus 1, since we will null terminate
6080 the vector allocated based on this size. However, the ELF symbol table
6081 always has a dummy entry as symbol #0, so it ends up even. */
6084 _bfd_elf_get_symtab_upper_bound (bfd
*abfd
)
6088 Elf_Internal_Shdr
*hdr
= &elf_tdata (abfd
)->symtab_hdr
;
6090 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
6091 symtab_size
= (symcount
+ 1) * (sizeof (asymbol
*));
6093 symtab_size
-= sizeof (asymbol
*);
6099 _bfd_elf_get_dynamic_symtab_upper_bound (bfd
*abfd
)
6103 Elf_Internal_Shdr
*hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
6105 if (elf_dynsymtab (abfd
) == 0)
6107 bfd_set_error (bfd_error_invalid_operation
);
6111 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
6112 symtab_size
= (symcount
+ 1) * (sizeof (asymbol
*));
6114 symtab_size
-= sizeof (asymbol
*);
6120 _bfd_elf_get_reloc_upper_bound (bfd
*abfd ATTRIBUTE_UNUSED
,
6123 return (asect
->reloc_count
+ 1) * sizeof (arelent
*);
6126 /* Canonicalize the relocs. */
6129 _bfd_elf_canonicalize_reloc (bfd
*abfd
,
6136 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
6138 if (! bed
->s
->slurp_reloc_table (abfd
, section
, symbols
, FALSE
))
6141 tblptr
= section
->relocation
;
6142 for (i
= 0; i
< section
->reloc_count
; i
++)
6143 *relptr
++ = tblptr
++;
6147 return section
->reloc_count
;
6151 _bfd_elf_canonicalize_symtab (bfd
*abfd
, asymbol
**allocation
)
6153 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
6154 long symcount
= bed
->s
->slurp_symbol_table (abfd
, allocation
, FALSE
);
6157 bfd_get_symcount (abfd
) = symcount
;
6162 _bfd_elf_canonicalize_dynamic_symtab (bfd
*abfd
,
6163 asymbol
**allocation
)
6165 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
6166 long symcount
= bed
->s
->slurp_symbol_table (abfd
, allocation
, TRUE
);
6169 bfd_get_dynamic_symcount (abfd
) = symcount
;
6173 /* Return the size required for the dynamic reloc entries. Any loadable
6174 section that was actually installed in the BFD, and has type SHT_REL
6175 or SHT_RELA, and uses the dynamic symbol table, is considered to be a
6176 dynamic reloc section. */
6179 _bfd_elf_get_dynamic_reloc_upper_bound (bfd
*abfd
)
6184 if (elf_dynsymtab (abfd
) == 0)
6186 bfd_set_error (bfd_error_invalid_operation
);
6190 ret
= sizeof (arelent
*);
6191 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
6192 if ((s
->flags
& SEC_LOAD
) != 0
6193 && elf_section_data (s
)->this_hdr
.sh_link
== elf_dynsymtab (abfd
)
6194 && (elf_section_data (s
)->this_hdr
.sh_type
== SHT_REL
6195 || elf_section_data (s
)->this_hdr
.sh_type
== SHT_RELA
))
6196 ret
+= ((s
->size
/ elf_section_data (s
)->this_hdr
.sh_entsize
)
6197 * sizeof (arelent
*));
6202 /* Canonicalize the dynamic relocation entries. Note that we return the
6203 dynamic relocations as a single block, although they are actually
6204 associated with particular sections; the interface, which was
6205 designed for SunOS style shared libraries, expects that there is only
6206 one set of dynamic relocs. Any loadable section that was actually
6207 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses the
6208 dynamic symbol table, is considered to be a dynamic reloc section. */
6211 _bfd_elf_canonicalize_dynamic_reloc (bfd
*abfd
,
6215 bfd_boolean (*slurp_relocs
) (bfd
*, asection
*, asymbol
**, bfd_boolean
);
6219 if (elf_dynsymtab (abfd
) == 0)
6221 bfd_set_error (bfd_error_invalid_operation
);
6225 slurp_relocs
= get_elf_backend_data (abfd
)->s
->slurp_reloc_table
;
6227 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
6229 if ((s
->flags
& SEC_LOAD
) != 0
6230 && elf_section_data (s
)->this_hdr
.sh_link
== elf_dynsymtab (abfd
)
6231 && (elf_section_data (s
)->this_hdr
.sh_type
== SHT_REL
6232 || elf_section_data (s
)->this_hdr
.sh_type
== SHT_RELA
))
6237 if (! (*slurp_relocs
) (abfd
, s
, syms
, TRUE
))
6239 count
= s
->size
/ elf_section_data (s
)->this_hdr
.sh_entsize
;
6241 for (i
= 0; i
< count
; i
++)
6252 /* Read in the version information. */
6255 _bfd_elf_slurp_version_tables (bfd
*abfd
, bfd_boolean default_imported_symver
)
6257 bfd_byte
*contents
= NULL
;
6258 unsigned int freeidx
= 0;
6260 if (elf_dynverref (abfd
) != 0)
6262 Elf_Internal_Shdr
*hdr
;
6263 Elf_External_Verneed
*everneed
;
6264 Elf_Internal_Verneed
*iverneed
;
6266 bfd_byte
*contents_end
;
6268 hdr
= &elf_tdata (abfd
)->dynverref_hdr
;
6270 elf_tdata (abfd
)->verref
= bfd_zalloc2 (abfd
, hdr
->sh_info
,
6271 sizeof (Elf_Internal_Verneed
));
6272 if (elf_tdata (abfd
)->verref
== NULL
)
6275 elf_tdata (abfd
)->cverrefs
= hdr
->sh_info
;
6277 contents
= bfd_malloc (hdr
->sh_size
);
6278 if (contents
== NULL
)
6280 error_return_verref
:
6281 elf_tdata (abfd
)->verref
= NULL
;
6282 elf_tdata (abfd
)->cverrefs
= 0;
6285 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
6286 || bfd_bread (contents
, hdr
->sh_size
, abfd
) != hdr
->sh_size
)
6287 goto error_return_verref
;
6289 if (hdr
->sh_info
&& hdr
->sh_size
< sizeof (Elf_External_Verneed
))
6290 goto error_return_verref
;
6292 BFD_ASSERT (sizeof (Elf_External_Verneed
)
6293 == sizeof (Elf_External_Vernaux
));
6294 contents_end
= contents
+ hdr
->sh_size
- sizeof (Elf_External_Verneed
);
6295 everneed
= (Elf_External_Verneed
*) contents
;
6296 iverneed
= elf_tdata (abfd
)->verref
;
6297 for (i
= 0; i
< hdr
->sh_info
; i
++, iverneed
++)
6299 Elf_External_Vernaux
*evernaux
;
6300 Elf_Internal_Vernaux
*ivernaux
;
6303 _bfd_elf_swap_verneed_in (abfd
, everneed
, iverneed
);
6305 iverneed
->vn_bfd
= abfd
;
6307 iverneed
->vn_filename
=
6308 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
6310 if (iverneed
->vn_filename
== NULL
)
6311 goto error_return_verref
;
6313 if (iverneed
->vn_cnt
== 0)
6314 iverneed
->vn_auxptr
= NULL
;
6317 iverneed
->vn_auxptr
= bfd_alloc2 (abfd
, iverneed
->vn_cnt
,
6318 sizeof (Elf_Internal_Vernaux
));
6319 if (iverneed
->vn_auxptr
== NULL
)
6320 goto error_return_verref
;
6323 if (iverneed
->vn_aux
6324 > (size_t) (contents_end
- (bfd_byte
*) everneed
))
6325 goto error_return_verref
;
6327 evernaux
= ((Elf_External_Vernaux
*)
6328 ((bfd_byte
*) everneed
+ iverneed
->vn_aux
));
6329 ivernaux
= iverneed
->vn_auxptr
;
6330 for (j
= 0; j
< iverneed
->vn_cnt
; j
++, ivernaux
++)
6332 _bfd_elf_swap_vernaux_in (abfd
, evernaux
, ivernaux
);
6334 ivernaux
->vna_nodename
=
6335 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
6336 ivernaux
->vna_name
);
6337 if (ivernaux
->vna_nodename
== NULL
)
6338 goto error_return_verref
;
6340 if (j
+ 1 < iverneed
->vn_cnt
)
6341 ivernaux
->vna_nextptr
= ivernaux
+ 1;
6343 ivernaux
->vna_nextptr
= NULL
;
6345 if (ivernaux
->vna_next
6346 > (size_t) (contents_end
- (bfd_byte
*) evernaux
))
6347 goto error_return_verref
;
6349 evernaux
= ((Elf_External_Vernaux
*)
6350 ((bfd_byte
*) evernaux
+ ivernaux
->vna_next
));
6352 if (ivernaux
->vna_other
> freeidx
)
6353 freeidx
= ivernaux
->vna_other
;
6356 if (i
+ 1 < hdr
->sh_info
)
6357 iverneed
->vn_nextref
= iverneed
+ 1;
6359 iverneed
->vn_nextref
= NULL
;
6361 if (iverneed
->vn_next
6362 > (size_t) (contents_end
- (bfd_byte
*) everneed
))
6363 goto error_return_verref
;
6365 everneed
= ((Elf_External_Verneed
*)
6366 ((bfd_byte
*) everneed
+ iverneed
->vn_next
));
6373 if (elf_dynverdef (abfd
) != 0)
6375 Elf_Internal_Shdr
*hdr
;
6376 Elf_External_Verdef
*everdef
;
6377 Elf_Internal_Verdef
*iverdef
;
6378 Elf_Internal_Verdef
*iverdefarr
;
6379 Elf_Internal_Verdef iverdefmem
;
6381 unsigned int maxidx
;
6382 bfd_byte
*contents_end_def
, *contents_end_aux
;
6384 hdr
= &elf_tdata (abfd
)->dynverdef_hdr
;
6386 contents
= bfd_malloc (hdr
->sh_size
);
6387 if (contents
== NULL
)
6389 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
6390 || bfd_bread (contents
, hdr
->sh_size
, abfd
) != hdr
->sh_size
)
6393 if (hdr
->sh_info
&& hdr
->sh_size
< sizeof (Elf_External_Verdef
))
6396 BFD_ASSERT (sizeof (Elf_External_Verdef
)
6397 >= sizeof (Elf_External_Verdaux
));
6398 contents_end_def
= contents
+ hdr
->sh_size
6399 - sizeof (Elf_External_Verdef
);
6400 contents_end_aux
= contents
+ hdr
->sh_size
6401 - sizeof (Elf_External_Verdaux
);
6403 /* We know the number of entries in the section but not the maximum
6404 index. Therefore we have to run through all entries and find
6406 everdef
= (Elf_External_Verdef
*) contents
;
6408 for (i
= 0; i
< hdr
->sh_info
; ++i
)
6410 _bfd_elf_swap_verdef_in (abfd
, everdef
, &iverdefmem
);
6412 if ((iverdefmem
.vd_ndx
& ((unsigned) VERSYM_VERSION
)) > maxidx
)
6413 maxidx
= iverdefmem
.vd_ndx
& ((unsigned) VERSYM_VERSION
);
6415 if (iverdefmem
.vd_next
6416 > (size_t) (contents_end_def
- (bfd_byte
*) everdef
))
6419 everdef
= ((Elf_External_Verdef
*)
6420 ((bfd_byte
*) everdef
+ iverdefmem
.vd_next
));
6423 if (default_imported_symver
)
6425 if (freeidx
> maxidx
)
6430 elf_tdata (abfd
)->verdef
= bfd_zalloc2 (abfd
, maxidx
,
6431 sizeof (Elf_Internal_Verdef
));
6432 if (elf_tdata (abfd
)->verdef
== NULL
)
6435 elf_tdata (abfd
)->cverdefs
= maxidx
;
6437 everdef
= (Elf_External_Verdef
*) contents
;
6438 iverdefarr
= elf_tdata (abfd
)->verdef
;
6439 for (i
= 0; i
< hdr
->sh_info
; i
++)
6441 Elf_External_Verdaux
*everdaux
;
6442 Elf_Internal_Verdaux
*iverdaux
;
6445 _bfd_elf_swap_verdef_in (abfd
, everdef
, &iverdefmem
);
6447 if ((iverdefmem
.vd_ndx
& VERSYM_VERSION
) == 0)
6449 error_return_verdef
:
6450 elf_tdata (abfd
)->verdef
= NULL
;
6451 elf_tdata (abfd
)->cverdefs
= 0;
6455 iverdef
= &iverdefarr
[(iverdefmem
.vd_ndx
& VERSYM_VERSION
) - 1];
6456 memcpy (iverdef
, &iverdefmem
, sizeof (Elf_Internal_Verdef
));
6458 iverdef
->vd_bfd
= abfd
;
6460 if (iverdef
->vd_cnt
== 0)
6461 iverdef
->vd_auxptr
= NULL
;
6464 iverdef
->vd_auxptr
= bfd_alloc2 (abfd
, iverdef
->vd_cnt
,
6465 sizeof (Elf_Internal_Verdaux
));
6466 if (iverdef
->vd_auxptr
== NULL
)
6467 goto error_return_verdef
;
6471 > (size_t) (contents_end_aux
- (bfd_byte
*) everdef
))
6472 goto error_return_verdef
;
6474 everdaux
= ((Elf_External_Verdaux
*)
6475 ((bfd_byte
*) everdef
+ iverdef
->vd_aux
));
6476 iverdaux
= iverdef
->vd_auxptr
;
6477 for (j
= 0; j
< iverdef
->vd_cnt
; j
++, iverdaux
++)
6479 _bfd_elf_swap_verdaux_in (abfd
, everdaux
, iverdaux
);
6481 iverdaux
->vda_nodename
=
6482 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
6483 iverdaux
->vda_name
);
6484 if (iverdaux
->vda_nodename
== NULL
)
6485 goto error_return_verdef
;
6487 if (j
+ 1 < iverdef
->vd_cnt
)
6488 iverdaux
->vda_nextptr
= iverdaux
+ 1;
6490 iverdaux
->vda_nextptr
= NULL
;
6492 if (iverdaux
->vda_next
6493 > (size_t) (contents_end_aux
- (bfd_byte
*) everdaux
))
6494 goto error_return_verdef
;
6496 everdaux
= ((Elf_External_Verdaux
*)
6497 ((bfd_byte
*) everdaux
+ iverdaux
->vda_next
));
6500 if (iverdef
->vd_cnt
)
6501 iverdef
->vd_nodename
= iverdef
->vd_auxptr
->vda_nodename
;
6503 if ((size_t) (iverdef
- iverdefarr
) + 1 < maxidx
)
6504 iverdef
->vd_nextdef
= iverdef
+ 1;
6506 iverdef
->vd_nextdef
= NULL
;
6508 everdef
= ((Elf_External_Verdef
*)
6509 ((bfd_byte
*) everdef
+ iverdef
->vd_next
));
6515 else if (default_imported_symver
)
6522 elf_tdata (abfd
)->verdef
= bfd_zalloc2 (abfd
, freeidx
,
6523 sizeof (Elf_Internal_Verdef
));
6524 if (elf_tdata (abfd
)->verdef
== NULL
)
6527 elf_tdata (abfd
)->cverdefs
= freeidx
;
6530 /* Create a default version based on the soname. */
6531 if (default_imported_symver
)
6533 Elf_Internal_Verdef
*iverdef
;
6534 Elf_Internal_Verdaux
*iverdaux
;
6536 iverdef
= &elf_tdata (abfd
)->verdef
[freeidx
- 1];;
6538 iverdef
->vd_version
= VER_DEF_CURRENT
;
6539 iverdef
->vd_flags
= 0;
6540 iverdef
->vd_ndx
= freeidx
;
6541 iverdef
->vd_cnt
= 1;
6543 iverdef
->vd_bfd
= abfd
;
6545 iverdef
->vd_nodename
= bfd_elf_get_dt_soname (abfd
);
6546 if (iverdef
->vd_nodename
== NULL
)
6547 goto error_return_verdef
;
6548 iverdef
->vd_nextdef
= NULL
;
6549 iverdef
->vd_auxptr
= bfd_alloc (abfd
, sizeof (Elf_Internal_Verdaux
));
6550 if (iverdef
->vd_auxptr
== NULL
)
6551 goto error_return_verdef
;
6553 iverdaux
= iverdef
->vd_auxptr
;
6554 iverdaux
->vda_nodename
= iverdef
->vd_nodename
;
6555 iverdaux
->vda_nextptr
= NULL
;
6561 if (contents
!= NULL
)
6567 _bfd_elf_make_empty_symbol (bfd
*abfd
)
6569 elf_symbol_type
*newsym
;
6570 bfd_size_type amt
= sizeof (elf_symbol_type
);
6572 newsym
= bfd_zalloc (abfd
, amt
);
6577 newsym
->symbol
.the_bfd
= abfd
;
6578 return &newsym
->symbol
;
6583 _bfd_elf_get_symbol_info (bfd
*abfd ATTRIBUTE_UNUSED
,
6587 bfd_symbol_info (symbol
, ret
);
6590 /* Return whether a symbol name implies a local symbol. Most targets
6591 use this function for the is_local_label_name entry point, but some
6595 _bfd_elf_is_local_label_name (bfd
*abfd ATTRIBUTE_UNUSED
,
6598 /* Normal local symbols start with ``.L''. */
6599 if (name
[0] == '.' && name
[1] == 'L')
6602 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
6603 DWARF debugging symbols starting with ``..''. */
6604 if (name
[0] == '.' && name
[1] == '.')
6607 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
6608 emitting DWARF debugging output. I suspect this is actually a
6609 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
6610 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
6611 underscore to be emitted on some ELF targets). For ease of use,
6612 we treat such symbols as local. */
6613 if (name
[0] == '_' && name
[1] == '.' && name
[2] == 'L' && name
[3] == '_')
6620 _bfd_elf_get_lineno (bfd
*abfd ATTRIBUTE_UNUSED
,
6621 asymbol
*symbol ATTRIBUTE_UNUSED
)
6628 _bfd_elf_set_arch_mach (bfd
*abfd
,
6629 enum bfd_architecture arch
,
6630 unsigned long machine
)
6632 /* If this isn't the right architecture for this backend, and this
6633 isn't the generic backend, fail. */
6634 if (arch
!= get_elf_backend_data (abfd
)->arch
6635 && arch
!= bfd_arch_unknown
6636 && get_elf_backend_data (abfd
)->arch
!= bfd_arch_unknown
)
6639 return bfd_default_set_arch_mach (abfd
, arch
, machine
);
6642 /* Find the function to a particular section and offset,
6643 for error reporting. */
6646 elf_find_function (bfd
*abfd ATTRIBUTE_UNUSED
,
6650 const char **filename_ptr
,
6651 const char **functionname_ptr
)
6653 const char *filename
;
6654 asymbol
*func
, *file
;
6657 /* ??? Given multiple file symbols, it is impossible to reliably
6658 choose the right file name for global symbols. File symbols are
6659 local symbols, and thus all file symbols must sort before any
6660 global symbols. The ELF spec may be interpreted to say that a
6661 file symbol must sort before other local symbols, but currently
6662 ld -r doesn't do this. So, for ld -r output, it is possible to
6663 make a better choice of file name for local symbols by ignoring
6664 file symbols appearing after a given local symbol. */
6665 enum { nothing_seen
, symbol_seen
, file_after_symbol_seen
} state
;
6671 state
= nothing_seen
;
6673 for (p
= symbols
; *p
!= NULL
; p
++)
6677 q
= (elf_symbol_type
*) *p
;
6679 switch (ELF_ST_TYPE (q
->internal_elf_sym
.st_info
))
6685 if (state
== symbol_seen
)
6686 state
= file_after_symbol_seen
;
6692 if (bfd_get_section (&q
->symbol
) == section
6693 && q
->symbol
.value
>= low_func
6694 && q
->symbol
.value
<= offset
)
6696 func
= (asymbol
*) q
;
6697 low_func
= q
->symbol
.value
;
6700 else if (ELF_ST_BIND (q
->internal_elf_sym
.st_info
) != STB_LOCAL
6701 && state
== file_after_symbol_seen
)
6704 filename
= bfd_asymbol_name (file
);
6708 if (state
== nothing_seen
)
6709 state
= symbol_seen
;
6716 *filename_ptr
= filename
;
6717 if (functionname_ptr
)
6718 *functionname_ptr
= bfd_asymbol_name (func
);
6723 /* Find the nearest line to a particular section and offset,
6724 for error reporting. */
6727 _bfd_elf_find_nearest_line (bfd
*abfd
,
6731 const char **filename_ptr
,
6732 const char **functionname_ptr
,
6733 unsigned int *line_ptr
)
6737 if (_bfd_dwarf1_find_nearest_line (abfd
, section
, symbols
, offset
,
6738 filename_ptr
, functionname_ptr
,
6741 if (!*functionname_ptr
)
6742 elf_find_function (abfd
, section
, symbols
, offset
,
6743 *filename_ptr
? NULL
: filename_ptr
,
6749 if (_bfd_dwarf2_find_nearest_line (abfd
, section
, symbols
, offset
,
6750 filename_ptr
, functionname_ptr
,
6752 &elf_tdata (abfd
)->dwarf2_find_line_info
))
6754 if (!*functionname_ptr
)
6755 elf_find_function (abfd
, section
, symbols
, offset
,
6756 *filename_ptr
? NULL
: filename_ptr
,
6762 if (! _bfd_stab_section_find_nearest_line (abfd
, symbols
, section
, offset
,
6763 &found
, filename_ptr
,
6764 functionname_ptr
, line_ptr
,
6765 &elf_tdata (abfd
)->line_info
))
6767 if (found
&& (*functionname_ptr
|| *line_ptr
))
6770 if (symbols
== NULL
)
6773 if (! elf_find_function (abfd
, section
, symbols
, offset
,
6774 filename_ptr
, functionname_ptr
))
6781 /* Find the line for a symbol. */
6784 _bfd_elf_find_line (bfd
*abfd
, asymbol
**symbols
, asymbol
*symbol
,
6785 const char **filename_ptr
, unsigned int *line_ptr
)
6787 return _bfd_dwarf2_find_line (abfd
, symbols
, symbol
,
6788 filename_ptr
, line_ptr
, 0,
6789 &elf_tdata (abfd
)->dwarf2_find_line_info
);
6792 /* After a call to bfd_find_nearest_line, successive calls to
6793 bfd_find_inliner_info can be used to get source information about
6794 each level of function inlining that terminated at the address
6795 passed to bfd_find_nearest_line. Currently this is only supported
6796 for DWARF2 with appropriate DWARF3 extensions. */
6799 _bfd_elf_find_inliner_info (bfd
*abfd
,
6800 const char **filename_ptr
,
6801 const char **functionname_ptr
,
6802 unsigned int *line_ptr
)
6805 found
= _bfd_dwarf2_find_inliner_info (abfd
, filename_ptr
,
6806 functionname_ptr
, line_ptr
,
6807 & elf_tdata (abfd
)->dwarf2_find_line_info
);
6812 _bfd_elf_sizeof_headers (bfd
*abfd
, bfd_boolean reloc
)
6816 ret
= get_elf_backend_data (abfd
)->s
->sizeof_ehdr
;
6818 ret
+= get_program_header_size (abfd
);
6823 _bfd_elf_set_section_contents (bfd
*abfd
,
6825 const void *location
,
6827 bfd_size_type count
)
6829 Elf_Internal_Shdr
*hdr
;
6832 if (! abfd
->output_has_begun
6833 && ! _bfd_elf_compute_section_file_positions (abfd
, NULL
))
6836 hdr
= &elf_section_data (section
)->this_hdr
;
6837 pos
= hdr
->sh_offset
+ offset
;
6838 if (bfd_seek (abfd
, pos
, SEEK_SET
) != 0
6839 || bfd_bwrite (location
, count
, abfd
) != count
)
6846 _bfd_elf_no_info_to_howto (bfd
*abfd ATTRIBUTE_UNUSED
,
6847 arelent
*cache_ptr ATTRIBUTE_UNUSED
,
6848 Elf_Internal_Rela
*dst ATTRIBUTE_UNUSED
)
6853 /* Try to convert a non-ELF reloc into an ELF one. */
6856 _bfd_elf_validate_reloc (bfd
*abfd
, arelent
*areloc
)
6858 /* Check whether we really have an ELF howto. */
6860 if ((*areloc
->sym_ptr_ptr
)->the_bfd
->xvec
!= abfd
->xvec
)
6862 bfd_reloc_code_real_type code
;
6863 reloc_howto_type
*howto
;
6865 /* Alien reloc: Try to determine its type to replace it with an
6866 equivalent ELF reloc. */
6868 if (areloc
->howto
->pc_relative
)
6870 switch (areloc
->howto
->bitsize
)
6873 code
= BFD_RELOC_8_PCREL
;
6876 code
= BFD_RELOC_12_PCREL
;
6879 code
= BFD_RELOC_16_PCREL
;
6882 code
= BFD_RELOC_24_PCREL
;
6885 code
= BFD_RELOC_32_PCREL
;
6888 code
= BFD_RELOC_64_PCREL
;
6894 howto
= bfd_reloc_type_lookup (abfd
, code
);
6896 if (areloc
->howto
->pcrel_offset
!= howto
->pcrel_offset
)
6898 if (howto
->pcrel_offset
)
6899 areloc
->addend
+= areloc
->address
;
6901 areloc
->addend
-= areloc
->address
; /* addend is unsigned!! */
6906 switch (areloc
->howto
->bitsize
)
6912 code
= BFD_RELOC_14
;
6915 code
= BFD_RELOC_16
;
6918 code
= BFD_RELOC_26
;
6921 code
= BFD_RELOC_32
;
6924 code
= BFD_RELOC_64
;
6930 howto
= bfd_reloc_type_lookup (abfd
, code
);
6934 areloc
->howto
= howto
;
6942 (*_bfd_error_handler
)
6943 (_("%B: unsupported relocation type %s"),
6944 abfd
, areloc
->howto
->name
);
6945 bfd_set_error (bfd_error_bad_value
);
6950 _bfd_elf_close_and_cleanup (bfd
*abfd
)
6952 if (bfd_get_format (abfd
) == bfd_object
)
6954 if (elf_shstrtab (abfd
) != NULL
)
6955 _bfd_elf_strtab_free (elf_shstrtab (abfd
));
6956 _bfd_dwarf2_cleanup_debug_info (abfd
);
6959 return _bfd_generic_close_and_cleanup (abfd
);
6962 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
6963 in the relocation's offset. Thus we cannot allow any sort of sanity
6964 range-checking to interfere. There is nothing else to do in processing
6967 bfd_reloc_status_type
6968 _bfd_elf_rel_vtable_reloc_fn
6969 (bfd
*abfd ATTRIBUTE_UNUSED
, arelent
*re ATTRIBUTE_UNUSED
,
6970 struct bfd_symbol
*symbol ATTRIBUTE_UNUSED
,
6971 void *data ATTRIBUTE_UNUSED
, asection
*is ATTRIBUTE_UNUSED
,
6972 bfd
*obfd ATTRIBUTE_UNUSED
, char **errmsg ATTRIBUTE_UNUSED
)
6974 return bfd_reloc_ok
;
6977 /* Elf core file support. Much of this only works on native
6978 toolchains, since we rely on knowing the
6979 machine-dependent procfs structure in order to pick
6980 out details about the corefile. */
6982 #ifdef HAVE_SYS_PROCFS_H
6983 # include <sys/procfs.h>
6986 /* FIXME: this is kinda wrong, but it's what gdb wants. */
6989 elfcore_make_pid (bfd
*abfd
)
6991 return ((elf_tdata (abfd
)->core_lwpid
<< 16)
6992 + (elf_tdata (abfd
)->core_pid
));
6995 /* If there isn't a section called NAME, make one, using
6996 data from SECT. Note, this function will generate a
6997 reference to NAME, so you shouldn't deallocate or
7001 elfcore_maybe_make_sect (bfd
*abfd
, char *name
, asection
*sect
)
7005 if (bfd_get_section_by_name (abfd
, name
) != NULL
)
7008 sect2
= bfd_make_section (abfd
, name
);
7012 sect2
->size
= sect
->size
;
7013 sect2
->filepos
= sect
->filepos
;
7014 sect2
->flags
= sect
->flags
;
7015 sect2
->alignment_power
= sect
->alignment_power
;
7019 /* Create a pseudosection containing SIZE bytes at FILEPOS. This
7020 actually creates up to two pseudosections:
7021 - For the single-threaded case, a section named NAME, unless
7022 such a section already exists.
7023 - For the multi-threaded case, a section named "NAME/PID", where
7024 PID is elfcore_make_pid (abfd).
7025 Both pseudosections have identical contents. */
7027 _bfd_elfcore_make_pseudosection (bfd
*abfd
,
7033 char *threaded_name
;
7037 /* Build the section name. */
7039 sprintf (buf
, "%s/%d", name
, elfcore_make_pid (abfd
));
7040 len
= strlen (buf
) + 1;
7041 threaded_name
= bfd_alloc (abfd
, len
);
7042 if (threaded_name
== NULL
)
7044 memcpy (threaded_name
, buf
, len
);
7046 sect
= bfd_make_section_anyway (abfd
, threaded_name
);
7050 sect
->filepos
= filepos
;
7051 sect
->flags
= SEC_HAS_CONTENTS
;
7052 sect
->alignment_power
= 2;
7054 return elfcore_maybe_make_sect (abfd
, name
, sect
);
7057 /* prstatus_t exists on:
7059 linux 2.[01] + glibc
7063 #if defined (HAVE_PRSTATUS_T)
7066 elfcore_grok_prstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
7071 if (note
->descsz
== sizeof (prstatus_t
))
7075 size
= sizeof (prstat
.pr_reg
);
7076 offset
= offsetof (prstatus_t
, pr_reg
);
7077 memcpy (&prstat
, note
->descdata
, sizeof (prstat
));
7079 /* Do not overwrite the core signal if it
7080 has already been set by another thread. */
7081 if (elf_tdata (abfd
)->core_signal
== 0)
7082 elf_tdata (abfd
)->core_signal
= prstat
.pr_cursig
;
7083 elf_tdata (abfd
)->core_pid
= prstat
.pr_pid
;
7085 /* pr_who exists on:
7088 pr_who doesn't exist on:
7091 #if defined (HAVE_PRSTATUS_T_PR_WHO)
7092 elf_tdata (abfd
)->core_lwpid
= prstat
.pr_who
;
7095 #if defined (HAVE_PRSTATUS32_T)
7096 else if (note
->descsz
== sizeof (prstatus32_t
))
7098 /* 64-bit host, 32-bit corefile */
7099 prstatus32_t prstat
;
7101 size
= sizeof (prstat
.pr_reg
);
7102 offset
= offsetof (prstatus32_t
, pr_reg
);
7103 memcpy (&prstat
, note
->descdata
, sizeof (prstat
));
7105 /* Do not overwrite the core signal if it
7106 has already been set by another thread. */
7107 if (elf_tdata (abfd
)->core_signal
== 0)
7108 elf_tdata (abfd
)->core_signal
= prstat
.pr_cursig
;
7109 elf_tdata (abfd
)->core_pid
= prstat
.pr_pid
;
7111 /* pr_who exists on:
7114 pr_who doesn't exist on:
7117 #if defined (HAVE_PRSTATUS32_T_PR_WHO)
7118 elf_tdata (abfd
)->core_lwpid
= prstat
.pr_who
;
7121 #endif /* HAVE_PRSTATUS32_T */
7124 /* Fail - we don't know how to handle any other
7125 note size (ie. data object type). */
7129 /* Make a ".reg/999" section and a ".reg" section. */
7130 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
7131 size
, note
->descpos
+ offset
);
7133 #endif /* defined (HAVE_PRSTATUS_T) */
7135 /* Create a pseudosection containing the exact contents of NOTE. */
7137 elfcore_make_note_pseudosection (bfd
*abfd
,
7139 Elf_Internal_Note
*note
)
7141 return _bfd_elfcore_make_pseudosection (abfd
, name
,
7142 note
->descsz
, note
->descpos
);
7145 /* There isn't a consistent prfpregset_t across platforms,
7146 but it doesn't matter, because we don't have to pick this
7147 data structure apart. */
7150 elfcore_grok_prfpreg (bfd
*abfd
, Elf_Internal_Note
*note
)
7152 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
7155 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
7156 type of 5 (NT_PRXFPREG). Just include the whole note's contents
7160 elfcore_grok_prxfpreg (bfd
*abfd
, Elf_Internal_Note
*note
)
7162 return elfcore_make_note_pseudosection (abfd
, ".reg-xfp", note
);
7165 #if defined (HAVE_PRPSINFO_T)
7166 typedef prpsinfo_t elfcore_psinfo_t
;
7167 #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
7168 typedef prpsinfo32_t elfcore_psinfo32_t
;
7172 #if defined (HAVE_PSINFO_T)
7173 typedef psinfo_t elfcore_psinfo_t
;
7174 #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
7175 typedef psinfo32_t elfcore_psinfo32_t
;
7179 /* return a malloc'ed copy of a string at START which is at
7180 most MAX bytes long, possibly without a terminating '\0'.
7181 the copy will always have a terminating '\0'. */
7184 _bfd_elfcore_strndup (bfd
*abfd
, char *start
, size_t max
)
7187 char *end
= memchr (start
, '\0', max
);
7195 dups
= bfd_alloc (abfd
, len
+ 1);
7199 memcpy (dups
, start
, len
);
7205 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7207 elfcore_grok_psinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
7209 if (note
->descsz
== sizeof (elfcore_psinfo_t
))
7211 elfcore_psinfo_t psinfo
;
7213 memcpy (&psinfo
, note
->descdata
, sizeof (psinfo
));
7215 elf_tdata (abfd
)->core_program
7216 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_fname
,
7217 sizeof (psinfo
.pr_fname
));
7219 elf_tdata (abfd
)->core_command
7220 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_psargs
,
7221 sizeof (psinfo
.pr_psargs
));
7223 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
7224 else if (note
->descsz
== sizeof (elfcore_psinfo32_t
))
7226 /* 64-bit host, 32-bit corefile */
7227 elfcore_psinfo32_t psinfo
;
7229 memcpy (&psinfo
, note
->descdata
, sizeof (psinfo
));
7231 elf_tdata (abfd
)->core_program
7232 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_fname
,
7233 sizeof (psinfo
.pr_fname
));
7235 elf_tdata (abfd
)->core_command
7236 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_psargs
,
7237 sizeof (psinfo
.pr_psargs
));
7243 /* Fail - we don't know how to handle any other
7244 note size (ie. data object type). */
7248 /* Note that for some reason, a spurious space is tacked
7249 onto the end of the args in some (at least one anyway)
7250 implementations, so strip it off if it exists. */
7253 char *command
= elf_tdata (abfd
)->core_command
;
7254 int n
= strlen (command
);
7256 if (0 < n
&& command
[n
- 1] == ' ')
7257 command
[n
- 1] = '\0';
7262 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
7264 #if defined (HAVE_PSTATUS_T)
7266 elfcore_grok_pstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
7268 if (note
->descsz
== sizeof (pstatus_t
)
7269 #if defined (HAVE_PXSTATUS_T)
7270 || note
->descsz
== sizeof (pxstatus_t
)
7276 memcpy (&pstat
, note
->descdata
, sizeof (pstat
));
7278 elf_tdata (abfd
)->core_pid
= pstat
.pr_pid
;
7280 #if defined (HAVE_PSTATUS32_T)
7281 else if (note
->descsz
== sizeof (pstatus32_t
))
7283 /* 64-bit host, 32-bit corefile */
7286 memcpy (&pstat
, note
->descdata
, sizeof (pstat
));
7288 elf_tdata (abfd
)->core_pid
= pstat
.pr_pid
;
7291 /* Could grab some more details from the "representative"
7292 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
7293 NT_LWPSTATUS note, presumably. */
7297 #endif /* defined (HAVE_PSTATUS_T) */
7299 #if defined (HAVE_LWPSTATUS_T)
7301 elfcore_grok_lwpstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
7303 lwpstatus_t lwpstat
;
7309 if (note
->descsz
!= sizeof (lwpstat
)
7310 #if defined (HAVE_LWPXSTATUS_T)
7311 && note
->descsz
!= sizeof (lwpxstatus_t
)
7316 memcpy (&lwpstat
, note
->descdata
, sizeof (lwpstat
));
7318 elf_tdata (abfd
)->core_lwpid
= lwpstat
.pr_lwpid
;
7319 elf_tdata (abfd
)->core_signal
= lwpstat
.pr_cursig
;
7321 /* Make a ".reg/999" section. */
7323 sprintf (buf
, ".reg/%d", elfcore_make_pid (abfd
));
7324 len
= strlen (buf
) + 1;
7325 name
= bfd_alloc (abfd
, len
);
7328 memcpy (name
, buf
, len
);
7330 sect
= bfd_make_section_anyway (abfd
, name
);
7334 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7335 sect
->size
= sizeof (lwpstat
.pr_context
.uc_mcontext
.gregs
);
7336 sect
->filepos
= note
->descpos
7337 + offsetof (lwpstatus_t
, pr_context
.uc_mcontext
.gregs
);
7340 #if defined (HAVE_LWPSTATUS_T_PR_REG)
7341 sect
->size
= sizeof (lwpstat
.pr_reg
);
7342 sect
->filepos
= note
->descpos
+ offsetof (lwpstatus_t
, pr_reg
);
7345 sect
->flags
= SEC_HAS_CONTENTS
;
7346 sect
->alignment_power
= 2;
7348 if (!elfcore_maybe_make_sect (abfd
, ".reg", sect
))
7351 /* Make a ".reg2/999" section */
7353 sprintf (buf
, ".reg2/%d", elfcore_make_pid (abfd
));
7354 len
= strlen (buf
) + 1;
7355 name
= bfd_alloc (abfd
, len
);
7358 memcpy (name
, buf
, len
);
7360 sect
= bfd_make_section_anyway (abfd
, name
);
7364 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7365 sect
->size
= sizeof (lwpstat
.pr_context
.uc_mcontext
.fpregs
);
7366 sect
->filepos
= note
->descpos
7367 + offsetof (lwpstatus_t
, pr_context
.uc_mcontext
.fpregs
);
7370 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
7371 sect
->size
= sizeof (lwpstat
.pr_fpreg
);
7372 sect
->filepos
= note
->descpos
+ offsetof (lwpstatus_t
, pr_fpreg
);
7375 sect
->flags
= SEC_HAS_CONTENTS
;
7376 sect
->alignment_power
= 2;
7378 return elfcore_maybe_make_sect (abfd
, ".reg2", sect
);
7380 #endif /* defined (HAVE_LWPSTATUS_T) */
7382 #if defined (HAVE_WIN32_PSTATUS_T)
7384 elfcore_grok_win32pstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
7390 win32_pstatus_t pstatus
;
7392 if (note
->descsz
< sizeof (pstatus
))
7395 memcpy (&pstatus
, note
->descdata
, sizeof (pstatus
));
7397 switch (pstatus
.data_type
)
7399 case NOTE_INFO_PROCESS
:
7400 /* FIXME: need to add ->core_command. */
7401 elf_tdata (abfd
)->core_signal
= pstatus
.data
.process_info
.signal
;
7402 elf_tdata (abfd
)->core_pid
= pstatus
.data
.process_info
.pid
;
7405 case NOTE_INFO_THREAD
:
7406 /* Make a ".reg/999" section. */
7407 sprintf (buf
, ".reg/%ld", (long) pstatus
.data
.thread_info
.tid
);
7409 len
= strlen (buf
) + 1;
7410 name
= bfd_alloc (abfd
, len
);
7414 memcpy (name
, buf
, len
);
7416 sect
= bfd_make_section_anyway (abfd
, name
);
7420 sect
->size
= sizeof (pstatus
.data
.thread_info
.thread_context
);
7421 sect
->filepos
= (note
->descpos
7422 + offsetof (struct win32_pstatus
,
7423 data
.thread_info
.thread_context
));
7424 sect
->flags
= SEC_HAS_CONTENTS
;
7425 sect
->alignment_power
= 2;
7427 if (pstatus
.data
.thread_info
.is_active_thread
)
7428 if (! elfcore_maybe_make_sect (abfd
, ".reg", sect
))
7432 case NOTE_INFO_MODULE
:
7433 /* Make a ".module/xxxxxxxx" section. */
7434 sprintf (buf
, ".module/%08lx",
7435 (long) pstatus
.data
.module_info
.base_address
);
7437 len
= strlen (buf
) + 1;
7438 name
= bfd_alloc (abfd
, len
);
7442 memcpy (name
, buf
, len
);
7444 sect
= bfd_make_section_anyway (abfd
, name
);
7449 sect
->size
= note
->descsz
;
7450 sect
->filepos
= note
->descpos
;
7451 sect
->flags
= SEC_HAS_CONTENTS
;
7452 sect
->alignment_power
= 2;
7461 #endif /* HAVE_WIN32_PSTATUS_T */
7464 elfcore_grok_note (bfd
*abfd
, Elf_Internal_Note
*note
)
7466 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
7474 if (bed
->elf_backend_grok_prstatus
)
7475 if ((*bed
->elf_backend_grok_prstatus
) (abfd
, note
))
7477 #if defined (HAVE_PRSTATUS_T)
7478 return elfcore_grok_prstatus (abfd
, note
);
7483 #if defined (HAVE_PSTATUS_T)
7485 return elfcore_grok_pstatus (abfd
, note
);
7488 #if defined (HAVE_LWPSTATUS_T)
7490 return elfcore_grok_lwpstatus (abfd
, note
);
7493 case NT_FPREGSET
: /* FIXME: rename to NT_PRFPREG */
7494 return elfcore_grok_prfpreg (abfd
, note
);
7496 #if defined (HAVE_WIN32_PSTATUS_T)
7497 case NT_WIN32PSTATUS
:
7498 return elfcore_grok_win32pstatus (abfd
, note
);
7501 case NT_PRXFPREG
: /* Linux SSE extension */
7502 if (note
->namesz
== 6
7503 && strcmp (note
->namedata
, "LINUX") == 0)
7504 return elfcore_grok_prxfpreg (abfd
, note
);
7510 if (bed
->elf_backend_grok_psinfo
)
7511 if ((*bed
->elf_backend_grok_psinfo
) (abfd
, note
))
7513 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7514 return elfcore_grok_psinfo (abfd
, note
);
7521 asection
*sect
= bfd_make_section_anyway (abfd
, ".auxv");
7525 sect
->size
= note
->descsz
;
7526 sect
->filepos
= note
->descpos
;
7527 sect
->flags
= SEC_HAS_CONTENTS
;
7528 sect
->alignment_power
= 1 + bfd_get_arch_size (abfd
) / 32;
7536 elfcore_netbsd_get_lwpid (Elf_Internal_Note
*note
, int *lwpidp
)
7540 cp
= strchr (note
->namedata
, '@');
7543 *lwpidp
= atoi(cp
+ 1);
7550 elfcore_grok_netbsd_procinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
7553 /* Signal number at offset 0x08. */
7554 elf_tdata (abfd
)->core_signal
7555 = bfd_h_get_32 (abfd
, (bfd_byte
*) note
->descdata
+ 0x08);
7557 /* Process ID at offset 0x50. */
7558 elf_tdata (abfd
)->core_pid
7559 = bfd_h_get_32 (abfd
, (bfd_byte
*) note
->descdata
+ 0x50);
7561 /* Command name at 0x7c (max 32 bytes, including nul). */
7562 elf_tdata (abfd
)->core_command
7563 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 0x7c, 31);
7565 return elfcore_make_note_pseudosection (abfd
, ".note.netbsdcore.procinfo",
7570 elfcore_grok_netbsd_note (bfd
*abfd
, Elf_Internal_Note
*note
)
7574 if (elfcore_netbsd_get_lwpid (note
, &lwp
))
7575 elf_tdata (abfd
)->core_lwpid
= lwp
;
7577 if (note
->type
== NT_NETBSDCORE_PROCINFO
)
7579 /* NetBSD-specific core "procinfo". Note that we expect to
7580 find this note before any of the others, which is fine,
7581 since the kernel writes this note out first when it
7582 creates a core file. */
7584 return elfcore_grok_netbsd_procinfo (abfd
, note
);
7587 /* As of Jan 2002 there are no other machine-independent notes
7588 defined for NetBSD core files. If the note type is less
7589 than the start of the machine-dependent note types, we don't
7592 if (note
->type
< NT_NETBSDCORE_FIRSTMACH
)
7596 switch (bfd_get_arch (abfd
))
7598 /* On the Alpha, SPARC (32-bit and 64-bit), PT_GETREGS == mach+0 and
7599 PT_GETFPREGS == mach+2. */
7601 case bfd_arch_alpha
:
7602 case bfd_arch_sparc
:
7605 case NT_NETBSDCORE_FIRSTMACH
+0:
7606 return elfcore_make_note_pseudosection (abfd
, ".reg", note
);
7608 case NT_NETBSDCORE_FIRSTMACH
+2:
7609 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
7615 /* On all other arch's, PT_GETREGS == mach+1 and
7616 PT_GETFPREGS == mach+3. */
7621 case NT_NETBSDCORE_FIRSTMACH
+1:
7622 return elfcore_make_note_pseudosection (abfd
, ".reg", note
);
7624 case NT_NETBSDCORE_FIRSTMACH
+3:
7625 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
7635 elfcore_grok_nto_status (bfd
*abfd
, Elf_Internal_Note
*note
, pid_t
*tid
)
7637 void *ddata
= note
->descdata
;
7644 /* nto_procfs_status 'pid' field is at offset 0. */
7645 elf_tdata (abfd
)->core_pid
= bfd_get_32 (abfd
, (bfd_byte
*) ddata
);
7647 /* nto_procfs_status 'tid' field is at offset 4. Pass it back. */
7648 *tid
= bfd_get_32 (abfd
, (bfd_byte
*) ddata
+ 4);
7650 /* nto_procfs_status 'flags' field is at offset 8. */
7651 flags
= bfd_get_32 (abfd
, (bfd_byte
*) ddata
+ 8);
7653 /* nto_procfs_status 'what' field is at offset 14. */
7654 if ((sig
= bfd_get_16 (abfd
, (bfd_byte
*) ddata
+ 14)) > 0)
7656 elf_tdata (abfd
)->core_signal
= sig
;
7657 elf_tdata (abfd
)->core_lwpid
= *tid
;
7660 /* _DEBUG_FLAG_CURTID (current thread) is 0x80. Some cores
7661 do not come from signals so we make sure we set the current
7662 thread just in case. */
7663 if (flags
& 0x00000080)
7664 elf_tdata (abfd
)->core_lwpid
= *tid
;
7666 /* Make a ".qnx_core_status/%d" section. */
7667 sprintf (buf
, ".qnx_core_status/%ld", (long) *tid
);
7669 name
= bfd_alloc (abfd
, strlen (buf
) + 1);
7674 sect
= bfd_make_section_anyway (abfd
, name
);
7678 sect
->size
= note
->descsz
;
7679 sect
->filepos
= note
->descpos
;
7680 sect
->flags
= SEC_HAS_CONTENTS
;
7681 sect
->alignment_power
= 2;
7683 return (elfcore_maybe_make_sect (abfd
, ".qnx_core_status", sect
));
7687 elfcore_grok_nto_regs (bfd
*abfd
,
7688 Elf_Internal_Note
*note
,
7696 /* Make a "(base)/%d" section. */
7697 sprintf (buf
, "%s/%ld", base
, (long) tid
);
7699 name
= bfd_alloc (abfd
, strlen (buf
) + 1);
7704 sect
= bfd_make_section_anyway (abfd
, name
);
7708 sect
->size
= note
->descsz
;
7709 sect
->filepos
= note
->descpos
;
7710 sect
->flags
= SEC_HAS_CONTENTS
;
7711 sect
->alignment_power
= 2;
7713 /* This is the current thread. */
7714 if (elf_tdata (abfd
)->core_lwpid
== tid
)
7715 return elfcore_maybe_make_sect (abfd
, base
, sect
);
7720 #define BFD_QNT_CORE_INFO 7
7721 #define BFD_QNT_CORE_STATUS 8
7722 #define BFD_QNT_CORE_GREG 9
7723 #define BFD_QNT_CORE_FPREG 10
7726 elfcore_grok_nto_note (bfd
*abfd
, Elf_Internal_Note
*note
)
7728 /* Every GREG section has a STATUS section before it. Store the
7729 tid from the previous call to pass down to the next gregs
7731 static pid_t tid
= 1;
7735 case BFD_QNT_CORE_INFO
:
7736 return elfcore_make_note_pseudosection (abfd
, ".qnx_core_info", note
);
7737 case BFD_QNT_CORE_STATUS
:
7738 return elfcore_grok_nto_status (abfd
, note
, &tid
);
7739 case BFD_QNT_CORE_GREG
:
7740 return elfcore_grok_nto_regs (abfd
, note
, tid
, ".reg");
7741 case BFD_QNT_CORE_FPREG
:
7742 return elfcore_grok_nto_regs (abfd
, note
, tid
, ".reg2");
7748 /* Function: elfcore_write_note
7755 size of data for note
7758 End of buffer containing note. */
7761 elfcore_write_note (bfd
*abfd
,
7769 Elf_External_Note
*xnp
;
7779 const struct elf_backend_data
*bed
;
7781 namesz
= strlen (name
) + 1;
7782 bed
= get_elf_backend_data (abfd
);
7783 pad
= -namesz
& ((1 << bed
->s
->log_file_align
) - 1);
7786 newspace
= 12 + namesz
+ pad
+ size
;
7788 p
= realloc (buf
, *bufsiz
+ newspace
);
7790 *bufsiz
+= newspace
;
7791 xnp
= (Elf_External_Note
*) dest
;
7792 H_PUT_32 (abfd
, namesz
, xnp
->namesz
);
7793 H_PUT_32 (abfd
, size
, xnp
->descsz
);
7794 H_PUT_32 (abfd
, type
, xnp
->type
);
7798 memcpy (dest
, name
, namesz
);
7806 memcpy (dest
, input
, size
);
7810 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7812 elfcore_write_prpsinfo (bfd
*abfd
,
7819 char *note_name
= "CORE";
7821 #if defined (HAVE_PSINFO_T)
7823 note_type
= NT_PSINFO
;
7826 note_type
= NT_PRPSINFO
;
7829 memset (&data
, 0, sizeof (data
));
7830 strncpy (data
.pr_fname
, fname
, sizeof (data
.pr_fname
));
7831 strncpy (data
.pr_psargs
, psargs
, sizeof (data
.pr_psargs
));
7832 return elfcore_write_note (abfd
, buf
, bufsiz
,
7833 note_name
, note_type
, &data
, sizeof (data
));
7835 #endif /* PSINFO_T or PRPSINFO_T */
7837 #if defined (HAVE_PRSTATUS_T)
7839 elfcore_write_prstatus (bfd
*abfd
,
7847 char *note_name
= "CORE";
7849 memset (&prstat
, 0, sizeof (prstat
));
7850 prstat
.pr_pid
= pid
;
7851 prstat
.pr_cursig
= cursig
;
7852 memcpy (&prstat
.pr_reg
, gregs
, sizeof (prstat
.pr_reg
));
7853 return elfcore_write_note (abfd
, buf
, bufsiz
,
7854 note_name
, NT_PRSTATUS
, &prstat
, sizeof (prstat
));
7856 #endif /* HAVE_PRSTATUS_T */
7858 #if defined (HAVE_LWPSTATUS_T)
7860 elfcore_write_lwpstatus (bfd
*abfd
,
7867 lwpstatus_t lwpstat
;
7868 char *note_name
= "CORE";
7870 memset (&lwpstat
, 0, sizeof (lwpstat
));
7871 lwpstat
.pr_lwpid
= pid
>> 16;
7872 lwpstat
.pr_cursig
= cursig
;
7873 #if defined (HAVE_LWPSTATUS_T_PR_REG)
7874 memcpy (lwpstat
.pr_reg
, gregs
, sizeof (lwpstat
.pr_reg
));
7875 #elif defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7877 memcpy (lwpstat
.pr_context
.uc_mcontext
.gregs
,
7878 gregs
, sizeof (lwpstat
.pr_context
.uc_mcontext
.gregs
));
7880 memcpy (lwpstat
.pr_context
.uc_mcontext
.__gregs
,
7881 gregs
, sizeof (lwpstat
.pr_context
.uc_mcontext
.__gregs
));
7884 return elfcore_write_note (abfd
, buf
, bufsiz
, note_name
,
7885 NT_LWPSTATUS
, &lwpstat
, sizeof (lwpstat
));
7887 #endif /* HAVE_LWPSTATUS_T */
7889 #if defined (HAVE_PSTATUS_T)
7891 elfcore_write_pstatus (bfd
*abfd
,
7899 char *note_name
= "CORE";
7901 memset (&pstat
, 0, sizeof (pstat
));
7902 pstat
.pr_pid
= pid
& 0xffff;
7903 buf
= elfcore_write_note (abfd
, buf
, bufsiz
, note_name
,
7904 NT_PSTATUS
, &pstat
, sizeof (pstat
));
7907 #endif /* HAVE_PSTATUS_T */
7910 elfcore_write_prfpreg (bfd
*abfd
,
7916 char *note_name
= "CORE";
7917 return elfcore_write_note (abfd
, buf
, bufsiz
,
7918 note_name
, NT_FPREGSET
, fpregs
, size
);
7922 elfcore_write_prxfpreg (bfd
*abfd
,
7925 const void *xfpregs
,
7928 char *note_name
= "LINUX";
7929 return elfcore_write_note (abfd
, buf
, bufsiz
,
7930 note_name
, NT_PRXFPREG
, xfpregs
, size
);
7934 elfcore_read_notes (bfd
*abfd
, file_ptr offset
, bfd_size_type size
)
7942 if (bfd_seek (abfd
, offset
, SEEK_SET
) != 0)
7945 buf
= bfd_malloc (size
);
7949 if (bfd_bread (buf
, size
, abfd
) != size
)
7957 while (p
< buf
+ size
)
7959 /* FIXME: bad alignment assumption. */
7960 Elf_External_Note
*xnp
= (Elf_External_Note
*) p
;
7961 Elf_Internal_Note in
;
7963 in
.type
= H_GET_32 (abfd
, xnp
->type
);
7965 in
.namesz
= H_GET_32 (abfd
, xnp
->namesz
);
7966 in
.namedata
= xnp
->name
;
7968 in
.descsz
= H_GET_32 (abfd
, xnp
->descsz
);
7969 in
.descdata
= in
.namedata
+ BFD_ALIGN (in
.namesz
, 4);
7970 in
.descpos
= offset
+ (in
.descdata
- buf
);
7972 if (strncmp (in
.namedata
, "NetBSD-CORE", 11) == 0)
7974 if (! elfcore_grok_netbsd_note (abfd
, &in
))
7977 else if (strncmp (in
.namedata
, "QNX", 3) == 0)
7979 if (! elfcore_grok_nto_note (abfd
, &in
))
7984 if (! elfcore_grok_note (abfd
, &in
))
7988 p
= in
.descdata
+ BFD_ALIGN (in
.descsz
, 4);
7995 /* Providing external access to the ELF program header table. */
7997 /* Return an upper bound on the number of bytes required to store a
7998 copy of ABFD's program header table entries. Return -1 if an error
7999 occurs; bfd_get_error will return an appropriate code. */
8002 bfd_get_elf_phdr_upper_bound (bfd
*abfd
)
8004 if (abfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
8006 bfd_set_error (bfd_error_wrong_format
);
8010 return elf_elfheader (abfd
)->e_phnum
* sizeof (Elf_Internal_Phdr
);
8013 /* Copy ABFD's program header table entries to *PHDRS. The entries
8014 will be stored as an array of Elf_Internal_Phdr structures, as
8015 defined in include/elf/internal.h. To find out how large the
8016 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
8018 Return the number of program header table entries read, or -1 if an
8019 error occurs; bfd_get_error will return an appropriate code. */
8022 bfd_get_elf_phdrs (bfd
*abfd
, void *phdrs
)
8026 if (abfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
8028 bfd_set_error (bfd_error_wrong_format
);
8032 num_phdrs
= elf_elfheader (abfd
)->e_phnum
;
8033 memcpy (phdrs
, elf_tdata (abfd
)->phdr
,
8034 num_phdrs
* sizeof (Elf_Internal_Phdr
));
8040 _bfd_elf_sprintf_vma (bfd
*abfd ATTRIBUTE_UNUSED
, char *buf
, bfd_vma value
)
8043 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
8045 i_ehdrp
= elf_elfheader (abfd
);
8046 if (i_ehdrp
== NULL
)
8047 sprintf_vma (buf
, value
);
8050 if (i_ehdrp
->e_ident
[EI_CLASS
] == ELFCLASS64
)
8052 #if BFD_HOST_64BIT_LONG
8053 sprintf (buf
, "%016lx", value
);
8055 sprintf (buf
, "%08lx%08lx", _bfd_int64_high (value
),
8056 _bfd_int64_low (value
));
8060 sprintf (buf
, "%08lx", (unsigned long) (value
& 0xffffffff));
8063 sprintf_vma (buf
, value
);
8068 _bfd_elf_fprintf_vma (bfd
*abfd ATTRIBUTE_UNUSED
, void *stream
, bfd_vma value
)
8071 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
8073 i_ehdrp
= elf_elfheader (abfd
);
8074 if (i_ehdrp
== NULL
)
8075 fprintf_vma ((FILE *) stream
, value
);
8078 if (i_ehdrp
->e_ident
[EI_CLASS
] == ELFCLASS64
)
8080 #if BFD_HOST_64BIT_LONG
8081 fprintf ((FILE *) stream
, "%016lx", value
);
8083 fprintf ((FILE *) stream
, "%08lx%08lx",
8084 _bfd_int64_high (value
), _bfd_int64_low (value
));
8088 fprintf ((FILE *) stream
, "%08lx",
8089 (unsigned long) (value
& 0xffffffff));
8092 fprintf_vma ((FILE *) stream
, value
);
8096 enum elf_reloc_type_class
8097 _bfd_elf_reloc_type_class (const Elf_Internal_Rela
*rela ATTRIBUTE_UNUSED
)
8099 return reloc_class_normal
;
8102 /* For RELA architectures, return the relocation value for a
8103 relocation against a local symbol. */
8106 _bfd_elf_rela_local_sym (bfd
*abfd
,
8107 Elf_Internal_Sym
*sym
,
8109 Elf_Internal_Rela
*rel
)
8111 asection
*sec
= *psec
;
8114 relocation
= (sec
->output_section
->vma
8115 + sec
->output_offset
8117 if ((sec
->flags
& SEC_MERGE
)
8118 && ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
8119 && sec
->sec_info_type
== ELF_INFO_TYPE_MERGE
)
8122 _bfd_merged_section_offset (abfd
, psec
,
8123 elf_section_data (sec
)->sec_info
,
8124 sym
->st_value
+ rel
->r_addend
);
8127 /* If we have changed the section, and our original section is
8128 marked with SEC_EXCLUDE, it means that the original
8129 SEC_MERGE section has been completely subsumed in some
8130 other SEC_MERGE section. In this case, we need to leave
8131 some info around for --emit-relocs. */
8132 if ((sec
->flags
& SEC_EXCLUDE
) != 0)
8133 sec
->kept_section
= *psec
;
8136 rel
->r_addend
-= relocation
;
8137 rel
->r_addend
+= sec
->output_section
->vma
+ sec
->output_offset
;
8143 _bfd_elf_rel_local_sym (bfd
*abfd
,
8144 Elf_Internal_Sym
*sym
,
8148 asection
*sec
= *psec
;
8150 if (sec
->sec_info_type
!= ELF_INFO_TYPE_MERGE
)
8151 return sym
->st_value
+ addend
;
8153 return _bfd_merged_section_offset (abfd
, psec
,
8154 elf_section_data (sec
)->sec_info
,
8155 sym
->st_value
+ addend
);
8159 _bfd_elf_section_offset (bfd
*abfd
,
8160 struct bfd_link_info
*info
,
8164 switch (sec
->sec_info_type
)
8166 case ELF_INFO_TYPE_STABS
:
8167 return _bfd_stab_section_offset (sec
, elf_section_data (sec
)->sec_info
,
8169 case ELF_INFO_TYPE_EH_FRAME
:
8170 return _bfd_elf_eh_frame_section_offset (abfd
, info
, sec
, offset
);
8176 /* Create a new BFD as if by bfd_openr. Rather than opening a file,
8177 reconstruct an ELF file by reading the segments out of remote memory
8178 based on the ELF file header at EHDR_VMA and the ELF program headers it
8179 points to. If not null, *LOADBASEP is filled in with the difference
8180 between the VMAs from which the segments were read, and the VMAs the
8181 file headers (and hence BFD's idea of each section's VMA) put them at.
8183 The function TARGET_READ_MEMORY is called to copy LEN bytes from the
8184 remote memory at target address VMA into the local buffer at MYADDR; it
8185 should return zero on success or an `errno' code on failure. TEMPL must
8186 be a BFD for an ELF target with the word size and byte order found in
8187 the remote memory. */
8190 bfd_elf_bfd_from_remote_memory
8194 int (*target_read_memory
) (bfd_vma
, bfd_byte
*, int))
8196 return (*get_elf_backend_data (templ
)->elf_backend_bfd_from_remote_memory
)
8197 (templ
, ehdr_vma
, loadbasep
, target_read_memory
);
8201 _bfd_elf_get_synthetic_symtab (bfd
*abfd
,
8202 long symcount ATTRIBUTE_UNUSED
,
8203 asymbol
**syms ATTRIBUTE_UNUSED
,
8208 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
8211 const char *relplt_name
;
8212 bfd_boolean (*slurp_relocs
) (bfd
*, asection
*, asymbol
**, bfd_boolean
);
8216 Elf_Internal_Shdr
*hdr
;
8222 if ((abfd
->flags
& (DYNAMIC
| EXEC_P
)) == 0)
8225 if (dynsymcount
<= 0)
8228 if (!bed
->plt_sym_val
)
8231 relplt_name
= bed
->relplt_name
;
8232 if (relplt_name
== NULL
)
8233 relplt_name
= bed
->default_use_rela_p
? ".rela.plt" : ".rel.plt";
8234 relplt
= bfd_get_section_by_name (abfd
, relplt_name
);
8238 hdr
= &elf_section_data (relplt
)->this_hdr
;
8239 if (hdr
->sh_link
!= elf_dynsymtab (abfd
)
8240 || (hdr
->sh_type
!= SHT_REL
&& hdr
->sh_type
!= SHT_RELA
))
8243 plt
= bfd_get_section_by_name (abfd
, ".plt");
8247 slurp_relocs
= get_elf_backend_data (abfd
)->s
->slurp_reloc_table
;
8248 if (! (*slurp_relocs
) (abfd
, relplt
, dynsyms
, TRUE
))
8251 count
= relplt
->size
/ hdr
->sh_entsize
;
8252 size
= count
* sizeof (asymbol
);
8253 p
= relplt
->relocation
;
8254 for (i
= 0; i
< count
; i
++, s
++, p
++)
8255 size
+= strlen ((*p
->sym_ptr_ptr
)->name
) + sizeof ("@plt");
8257 s
= *ret
= bfd_malloc (size
);
8261 names
= (char *) (s
+ count
);
8262 p
= relplt
->relocation
;
8264 for (i
= 0; i
< count
; i
++, s
++, p
++)
8269 addr
= bed
->plt_sym_val (i
, plt
, p
);
8270 if (addr
== (bfd_vma
) -1)
8273 *s
= **p
->sym_ptr_ptr
;
8274 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
8275 we are defining a symbol, ensure one of them is set. */
8276 if ((s
->flags
& BSF_LOCAL
) == 0)
8277 s
->flags
|= BSF_GLOBAL
;
8279 s
->value
= addr
- plt
->vma
;
8281 len
= strlen ((*p
->sym_ptr_ptr
)->name
);
8282 memcpy (names
, (*p
->sym_ptr_ptr
)->name
, len
);
8284 memcpy (names
, "@plt", sizeof ("@plt"));
8285 names
+= sizeof ("@plt");
8292 /* Sort symbol by binding and section. We want to put definitions
8293 sorted by section at the beginning. */
8296 elf_sort_elf_symbol (const void *arg1
, const void *arg2
)
8298 const Elf_Internal_Sym
*s1
;
8299 const Elf_Internal_Sym
*s2
;
8302 /* Make sure that undefined symbols are at the end. */
8303 s1
= (const Elf_Internal_Sym
*) arg1
;
8304 if (s1
->st_shndx
== SHN_UNDEF
)
8306 s2
= (const Elf_Internal_Sym
*) arg2
;
8307 if (s2
->st_shndx
== SHN_UNDEF
)
8310 /* Sorted by section index. */
8311 shndx
= s1
->st_shndx
- s2
->st_shndx
;
8315 /* Sorted by binding. */
8316 return ELF_ST_BIND (s1
->st_info
) - ELF_ST_BIND (s2
->st_info
);
8321 Elf_Internal_Sym
*sym
;
8326 elf_sym_name_compare (const void *arg1
, const void *arg2
)
8328 const struct elf_symbol
*s1
= (const struct elf_symbol
*) arg1
;
8329 const struct elf_symbol
*s2
= (const struct elf_symbol
*) arg2
;
8330 return strcmp (s1
->name
, s2
->name
);
8333 /* Check if 2 sections define the same set of local and global
8337 bfd_elf_match_symbols_in_sections (asection
*sec1
, asection
*sec2
)
8340 const struct elf_backend_data
*bed1
, *bed2
;
8341 Elf_Internal_Shdr
*hdr1
, *hdr2
;
8342 bfd_size_type symcount1
, symcount2
;
8343 Elf_Internal_Sym
*isymbuf1
, *isymbuf2
;
8344 Elf_Internal_Sym
*isymstart1
= NULL
, *isymstart2
= NULL
, *isym
;
8345 Elf_Internal_Sym
*isymend
;
8346 struct elf_symbol
*symp
, *symtable1
= NULL
, *symtable2
= NULL
;
8347 bfd_size_type count1
, count2
, i
;
8354 /* If both are .gnu.linkonce sections, they have to have the same
8356 if (strncmp (sec1
->name
, ".gnu.linkonce",
8357 sizeof ".gnu.linkonce" - 1) == 0
8358 && strncmp (sec2
->name
, ".gnu.linkonce",
8359 sizeof ".gnu.linkonce" - 1) == 0)
8360 return strcmp (sec1
->name
+ sizeof ".gnu.linkonce",
8361 sec2
->name
+ sizeof ".gnu.linkonce") == 0;
8363 /* Both sections have to be in ELF. */
8364 if (bfd_get_flavour (bfd1
) != bfd_target_elf_flavour
8365 || bfd_get_flavour (bfd2
) != bfd_target_elf_flavour
)
8368 if (elf_section_type (sec1
) != elf_section_type (sec2
))
8371 if ((elf_section_flags (sec1
) & SHF_GROUP
) != 0
8372 && (elf_section_flags (sec2
) & SHF_GROUP
) != 0)
8374 /* If both are members of section groups, they have to have the
8376 if (strcmp (elf_group_name (sec1
), elf_group_name (sec2
)) != 0)
8380 shndx1
= _bfd_elf_section_from_bfd_section (bfd1
, sec1
);
8381 shndx2
= _bfd_elf_section_from_bfd_section (bfd2
, sec2
);
8382 if (shndx1
== -1 || shndx2
== -1)
8385 bed1
= get_elf_backend_data (bfd1
);
8386 bed2
= get_elf_backend_data (bfd2
);
8387 hdr1
= &elf_tdata (bfd1
)->symtab_hdr
;
8388 symcount1
= hdr1
->sh_size
/ bed1
->s
->sizeof_sym
;
8389 hdr2
= &elf_tdata (bfd2
)->symtab_hdr
;
8390 symcount2
= hdr2
->sh_size
/ bed2
->s
->sizeof_sym
;
8392 if (symcount1
== 0 || symcount2
== 0)
8395 isymbuf1
= bfd_elf_get_elf_syms (bfd1
, hdr1
, symcount1
, 0,
8397 isymbuf2
= bfd_elf_get_elf_syms (bfd2
, hdr2
, symcount2
, 0,
8401 if (isymbuf1
== NULL
|| isymbuf2
== NULL
)
8404 /* Sort symbols by binding and section. Global definitions are at
8406 qsort (isymbuf1
, symcount1
, sizeof (Elf_Internal_Sym
),
8407 elf_sort_elf_symbol
);
8408 qsort (isymbuf2
, symcount2
, sizeof (Elf_Internal_Sym
),
8409 elf_sort_elf_symbol
);
8411 /* Count definitions in the section. */
8413 for (isym
= isymbuf1
, isymend
= isym
+ symcount1
;
8414 isym
< isymend
; isym
++)
8416 if (isym
->st_shndx
== (unsigned int) shndx1
)
8423 if (count1
&& isym
->st_shndx
!= (unsigned int) shndx1
)
8428 for (isym
= isymbuf2
, isymend
= isym
+ symcount2
;
8429 isym
< isymend
; isym
++)
8431 if (isym
->st_shndx
== (unsigned int) shndx2
)
8438 if (count2
&& isym
->st_shndx
!= (unsigned int) shndx2
)
8442 if (count1
== 0 || count2
== 0 || count1
!= count2
)
8445 symtable1
= bfd_malloc (count1
* sizeof (struct elf_symbol
));
8446 symtable2
= bfd_malloc (count1
* sizeof (struct elf_symbol
));
8448 if (symtable1
== NULL
|| symtable2
== NULL
)
8452 for (isym
= isymstart1
, isymend
= isym
+ count1
;
8453 isym
< isymend
; isym
++)
8456 symp
->name
= bfd_elf_string_from_elf_section (bfd1
,
8463 for (isym
= isymstart2
, isymend
= isym
+ count1
;
8464 isym
< isymend
; isym
++)
8467 symp
->name
= bfd_elf_string_from_elf_section (bfd2
,
8473 /* Sort symbol by name. */
8474 qsort (symtable1
, count1
, sizeof (struct elf_symbol
),
8475 elf_sym_name_compare
);
8476 qsort (symtable2
, count1
, sizeof (struct elf_symbol
),
8477 elf_sym_name_compare
);
8479 for (i
= 0; i
< count1
; i
++)
8480 /* Two symbols must have the same binding, type and name. */
8481 if (symtable1
[i
].sym
->st_info
!= symtable2
[i
].sym
->st_info
8482 || symtable1
[i
].sym
->st_other
!= symtable2
[i
].sym
->st_other
8483 || strcmp (symtable1
[i
].name
, symtable2
[i
].name
) != 0)
8501 /* It is only used by x86-64 so far. */
8502 asection _bfd_elf_large_com_section
8503 = BFD_FAKE_SECTION (_bfd_elf_large_com_section
,
8504 SEC_IS_COMMON
, NULL
, NULL
, "LARGE_COMMON",
8507 /* Return TRUE if 2 section types are compatible. */
8510 _bfd_elf_match_sections_by_type (bfd
*abfd
, const asection
*asec
,
8511 bfd
*bbfd
, const asection
*bsec
)
8515 || abfd
->xvec
->flavour
!= bfd_target_elf_flavour
8516 || bbfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
8519 return elf_section_type (asec
) == elf_section_type (bsec
);