1 /* ELF executable support for BFD.
2 Copyright 1993, 94, 95, 96, 97, 98, 1999 Free Software Foundation, Inc.
4 This file is part of BFD, the Binary File Descriptor library.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
25 BFD support for ELF formats is being worked on.
26 Currently, the best supported back ends are for sparc and i386
27 (running svr4 or Solaris 2).
29 Documentation of the internals of the support code still needs
30 to be written. The code is changing quickly enough that we
41 static INLINE
struct elf_segment_map
*make_mapping
42 PARAMS ((bfd
*, asection
**, unsigned int, unsigned int, boolean
));
43 static boolean map_sections_to_segments
PARAMS ((bfd
*));
44 static int elf_sort_sections
PARAMS ((const PTR
, const PTR
));
45 static boolean assign_file_positions_for_segments
PARAMS ((bfd
*));
46 static boolean assign_file_positions_except_relocs
PARAMS ((bfd
*));
47 static boolean prep_headers
PARAMS ((bfd
*));
48 static boolean swap_out_syms
PARAMS ((bfd
*, struct bfd_strtab_hash
**, int));
49 static boolean copy_private_bfd_data
PARAMS ((bfd
*, bfd
*));
50 static char *elf_read
PARAMS ((bfd
*, long, unsigned int));
51 static void elf_fake_sections
PARAMS ((bfd
*, asection
*, PTR
));
52 static boolean assign_section_numbers
PARAMS ((bfd
*));
53 static INLINE
int sym_is_global
PARAMS ((bfd
*, asymbol
*));
54 static boolean elf_map_symbols
PARAMS ((bfd
*));
55 static bfd_size_type get_program_header_size
PARAMS ((bfd
*));
57 /* Swap version information in and out. The version information is
58 currently size independent. If that ever changes, this code will
59 need to move into elfcode.h. */
61 /* Swap in a Verdef structure. */
64 _bfd_elf_swap_verdef_in (abfd
, src
, dst
)
66 const Elf_External_Verdef
*src
;
67 Elf_Internal_Verdef
*dst
;
69 dst
->vd_version
= bfd_h_get_16 (abfd
, src
->vd_version
);
70 dst
->vd_flags
= bfd_h_get_16 (abfd
, src
->vd_flags
);
71 dst
->vd_ndx
= bfd_h_get_16 (abfd
, src
->vd_ndx
);
72 dst
->vd_cnt
= bfd_h_get_16 (abfd
, src
->vd_cnt
);
73 dst
->vd_hash
= bfd_h_get_32 (abfd
, src
->vd_hash
);
74 dst
->vd_aux
= bfd_h_get_32 (abfd
, src
->vd_aux
);
75 dst
->vd_next
= bfd_h_get_32 (abfd
, src
->vd_next
);
78 /* Swap out a Verdef structure. */
81 _bfd_elf_swap_verdef_out (abfd
, src
, dst
)
83 const Elf_Internal_Verdef
*src
;
84 Elf_External_Verdef
*dst
;
86 bfd_h_put_16 (abfd
, src
->vd_version
, dst
->vd_version
);
87 bfd_h_put_16 (abfd
, src
->vd_flags
, dst
->vd_flags
);
88 bfd_h_put_16 (abfd
, src
->vd_ndx
, dst
->vd_ndx
);
89 bfd_h_put_16 (abfd
, src
->vd_cnt
, dst
->vd_cnt
);
90 bfd_h_put_32 (abfd
, src
->vd_hash
, dst
->vd_hash
);
91 bfd_h_put_32 (abfd
, src
->vd_aux
, dst
->vd_aux
);
92 bfd_h_put_32 (abfd
, src
->vd_next
, dst
->vd_next
);
95 /* Swap in a Verdaux structure. */
98 _bfd_elf_swap_verdaux_in (abfd
, src
, dst
)
100 const Elf_External_Verdaux
*src
;
101 Elf_Internal_Verdaux
*dst
;
103 dst
->vda_name
= bfd_h_get_32 (abfd
, src
->vda_name
);
104 dst
->vda_next
= bfd_h_get_32 (abfd
, src
->vda_next
);
107 /* Swap out a Verdaux structure. */
110 _bfd_elf_swap_verdaux_out (abfd
, src
, dst
)
112 const Elf_Internal_Verdaux
*src
;
113 Elf_External_Verdaux
*dst
;
115 bfd_h_put_32 (abfd
, src
->vda_name
, dst
->vda_name
);
116 bfd_h_put_32 (abfd
, src
->vda_next
, dst
->vda_next
);
119 /* Swap in a Verneed structure. */
122 _bfd_elf_swap_verneed_in (abfd
, src
, dst
)
124 const Elf_External_Verneed
*src
;
125 Elf_Internal_Verneed
*dst
;
127 dst
->vn_version
= bfd_h_get_16 (abfd
, src
->vn_version
);
128 dst
->vn_cnt
= bfd_h_get_16 (abfd
, src
->vn_cnt
);
129 dst
->vn_file
= bfd_h_get_32 (abfd
, src
->vn_file
);
130 dst
->vn_aux
= bfd_h_get_32 (abfd
, src
->vn_aux
);
131 dst
->vn_next
= bfd_h_get_32 (abfd
, src
->vn_next
);
134 /* Swap out a Verneed structure. */
137 _bfd_elf_swap_verneed_out (abfd
, src
, dst
)
139 const Elf_Internal_Verneed
*src
;
140 Elf_External_Verneed
*dst
;
142 bfd_h_put_16 (abfd
, src
->vn_version
, dst
->vn_version
);
143 bfd_h_put_16 (abfd
, src
->vn_cnt
, dst
->vn_cnt
);
144 bfd_h_put_32 (abfd
, src
->vn_file
, dst
->vn_file
);
145 bfd_h_put_32 (abfd
, src
->vn_aux
, dst
->vn_aux
);
146 bfd_h_put_32 (abfd
, src
->vn_next
, dst
->vn_next
);
149 /* Swap in a Vernaux structure. */
152 _bfd_elf_swap_vernaux_in (abfd
, src
, dst
)
154 const Elf_External_Vernaux
*src
;
155 Elf_Internal_Vernaux
*dst
;
157 dst
->vna_hash
= bfd_h_get_32 (abfd
, src
->vna_hash
);
158 dst
->vna_flags
= bfd_h_get_16 (abfd
, src
->vna_flags
);
159 dst
->vna_other
= bfd_h_get_16 (abfd
, src
->vna_other
);
160 dst
->vna_name
= bfd_h_get_32 (abfd
, src
->vna_name
);
161 dst
->vna_next
= bfd_h_get_32 (abfd
, src
->vna_next
);
164 /* Swap out a Vernaux structure. */
167 _bfd_elf_swap_vernaux_out (abfd
, src
, dst
)
169 const Elf_Internal_Vernaux
*src
;
170 Elf_External_Vernaux
*dst
;
172 bfd_h_put_32 (abfd
, src
->vna_hash
, dst
->vna_hash
);
173 bfd_h_put_16 (abfd
, src
->vna_flags
, dst
->vna_flags
);
174 bfd_h_put_16 (abfd
, src
->vna_other
, dst
->vna_other
);
175 bfd_h_put_32 (abfd
, src
->vna_name
, dst
->vna_name
);
176 bfd_h_put_32 (abfd
, src
->vna_next
, dst
->vna_next
);
179 /* Swap in a Versym structure. */
182 _bfd_elf_swap_versym_in (abfd
, src
, dst
)
184 const Elf_External_Versym
*src
;
185 Elf_Internal_Versym
*dst
;
187 dst
->vs_vers
= bfd_h_get_16 (abfd
, src
->vs_vers
);
190 /* Swap out a Versym structure. */
193 _bfd_elf_swap_versym_out (abfd
, src
, dst
)
195 const Elf_Internal_Versym
*src
;
196 Elf_External_Versym
*dst
;
198 bfd_h_put_16 (abfd
, src
->vs_vers
, dst
->vs_vers
);
201 /* Standard ELF hash function. Do not change this function; you will
202 cause invalid hash tables to be generated. */
205 bfd_elf_hash (namearg
)
208 const unsigned char *name
= (const unsigned char *) namearg
;
213 while ((ch
= *name
++) != '\0')
216 if ((g
= (h
& 0xf0000000)) != 0)
219 /* The ELF ABI says `h &= ~g', but this is equivalent in
220 this case and on some machines one insn instead of two. */
227 /* Read a specified number of bytes at a specified offset in an ELF
228 file, into a newly allocated buffer, and return a pointer to the
232 elf_read (abfd
, offset
, size
)
239 if ((buf
= bfd_alloc (abfd
, size
)) == NULL
)
241 if (bfd_seek (abfd
, offset
, SEEK_SET
) == -1)
243 if (bfd_read ((PTR
) buf
, size
, 1, abfd
) != size
)
245 if (bfd_get_error () != bfd_error_system_call
)
246 bfd_set_error (bfd_error_file_truncated
);
253 bfd_elf_mkobject (abfd
)
256 /* this just does initialization */
257 /* coff_mkobject zalloc's space for tdata.coff_obj_data ... */
258 elf_tdata (abfd
) = (struct elf_obj_tdata
*)
259 bfd_zalloc (abfd
, sizeof (struct elf_obj_tdata
));
260 if (elf_tdata (abfd
) == 0)
262 /* since everything is done at close time, do we need any
269 bfd_elf_mkcorefile (abfd
)
272 /* I think this can be done just like an object file. */
273 return bfd_elf_mkobject (abfd
);
277 bfd_elf_get_str_section (abfd
, shindex
)
279 unsigned int shindex
;
281 Elf_Internal_Shdr
**i_shdrp
;
282 char *shstrtab
= NULL
;
284 unsigned int shstrtabsize
;
286 i_shdrp
= elf_elfsections (abfd
);
287 if (i_shdrp
== 0 || i_shdrp
[shindex
] == 0)
290 shstrtab
= (char *) i_shdrp
[shindex
]->contents
;
291 if (shstrtab
== NULL
)
293 /* No cached one, attempt to read, and cache what we read. */
294 offset
= i_shdrp
[shindex
]->sh_offset
;
295 shstrtabsize
= i_shdrp
[shindex
]->sh_size
;
296 shstrtab
= elf_read (abfd
, offset
, shstrtabsize
);
297 i_shdrp
[shindex
]->contents
= (PTR
) shstrtab
;
303 bfd_elf_string_from_elf_section (abfd
, shindex
, strindex
)
305 unsigned int shindex
;
306 unsigned int strindex
;
308 Elf_Internal_Shdr
*hdr
;
313 hdr
= elf_elfsections (abfd
)[shindex
];
315 if (hdr
->contents
== NULL
316 && bfd_elf_get_str_section (abfd
, shindex
) == NULL
)
319 if (strindex
>= hdr
->sh_size
)
321 (*_bfd_error_handler
)
322 (_("%s: invalid string offset %u >= %lu for section `%s'"),
323 bfd_get_filename (abfd
), strindex
, (unsigned long) hdr
->sh_size
,
324 ((shindex
== elf_elfheader(abfd
)->e_shstrndx
325 && strindex
== hdr
->sh_name
)
327 : elf_string_from_elf_strtab (abfd
, hdr
->sh_name
)));
331 return ((char *) hdr
->contents
) + strindex
;
334 /* Make a BFD section from an ELF section. We store a pointer to the
335 BFD section in the bfd_section field of the header. */
338 _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
)
340 Elf_Internal_Shdr
*hdr
;
346 if (hdr
->bfd_section
!= NULL
)
348 BFD_ASSERT (strcmp (name
,
349 bfd_get_section_name (abfd
, hdr
->bfd_section
)) == 0);
353 newsect
= bfd_make_section_anyway (abfd
, name
);
357 newsect
->filepos
= hdr
->sh_offset
;
359 if (! bfd_set_section_vma (abfd
, newsect
, hdr
->sh_addr
)
360 || ! bfd_set_section_size (abfd
, newsect
, hdr
->sh_size
)
361 || ! bfd_set_section_alignment (abfd
, newsect
,
362 bfd_log2 (hdr
->sh_addralign
)))
365 flags
= SEC_NO_FLAGS
;
366 if (hdr
->sh_type
!= SHT_NOBITS
)
367 flags
|= SEC_HAS_CONTENTS
;
368 if ((hdr
->sh_flags
& SHF_ALLOC
) != 0)
371 if (hdr
->sh_type
!= SHT_NOBITS
)
374 if ((hdr
->sh_flags
& SHF_WRITE
) == 0)
375 flags
|= SEC_READONLY
;
376 if ((hdr
->sh_flags
& SHF_EXECINSTR
) != 0)
378 else if ((flags
& SEC_LOAD
) != 0)
381 /* The debugging sections appear to be recognized only by name, not
383 if (strncmp (name
, ".debug", sizeof ".debug" - 1) == 0
384 || strncmp (name
, ".line", sizeof ".line" - 1) == 0
385 || strncmp (name
, ".stab", sizeof ".stab" - 1) == 0)
386 flags
|= SEC_DEBUGGING
;
388 /* As a GNU extension, if the name begins with .gnu.linkonce, we
389 only link a single copy of the section. This is used to support
390 g++. g++ will emit each template expansion in its own section.
391 The symbols will be defined as weak, so that multiple definitions
392 are permitted. The GNU linker extension is to actually discard
393 all but one of the sections. */
394 if (strncmp (name
, ".gnu.linkonce", sizeof ".gnu.linkonce" - 1) == 0)
395 flags
|= SEC_LINK_ONCE
| SEC_LINK_DUPLICATES_DISCARD
;
397 if (! bfd_set_section_flags (abfd
, newsect
, flags
))
400 if ((flags
& SEC_ALLOC
) != 0)
402 Elf_Internal_Phdr
*phdr
;
405 /* Look through the phdrs to see if we need to adjust the lma.
406 If all the p_paddr fields are zero, we ignore them, since
407 some ELF linkers produce such output. */
408 phdr
= elf_tdata (abfd
)->phdr
;
409 for (i
= 0; i
< elf_elfheader (abfd
)->e_phnum
; i
++, phdr
++)
411 if (phdr
->p_paddr
!= 0)
414 if (i
< elf_elfheader (abfd
)->e_phnum
)
416 phdr
= elf_tdata (abfd
)->phdr
;
417 for (i
= 0; i
< elf_elfheader (abfd
)->e_phnum
; i
++, phdr
++)
419 if (phdr
->p_type
== PT_LOAD
420 && phdr
->p_vaddr
!= phdr
->p_paddr
421 && phdr
->p_vaddr
<= hdr
->sh_addr
422 && (phdr
->p_vaddr
+ phdr
->p_memsz
423 >= hdr
->sh_addr
+ hdr
->sh_size
)
424 && ((flags
& SEC_LOAD
) == 0
425 || (phdr
->p_offset
<= (bfd_vma
) hdr
->sh_offset
426 && (phdr
->p_offset
+ phdr
->p_filesz
427 >= hdr
->sh_offset
+ hdr
->sh_size
))))
429 newsect
->lma
+= phdr
->p_paddr
- phdr
->p_vaddr
;
436 hdr
->bfd_section
= newsect
;
437 elf_section_data (newsect
)->this_hdr
= *hdr
;
447 struct elf_internal_shdr *bfd_elf_find_section (bfd *abfd, char *name);
450 Helper functions for GDB to locate the string tables.
451 Since BFD hides string tables from callers, GDB needs to use an
452 internal hook to find them. Sun's .stabstr, in particular,
453 isn't even pointed to by the .stab section, so ordinary
454 mechanisms wouldn't work to find it, even if we had some.
457 struct elf_internal_shdr
*
458 bfd_elf_find_section (abfd
, name
)
462 Elf_Internal_Shdr
**i_shdrp
;
467 i_shdrp
= elf_elfsections (abfd
);
470 shstrtab
= bfd_elf_get_str_section
471 (abfd
, elf_elfheader (abfd
)->e_shstrndx
);
472 if (shstrtab
!= NULL
)
474 max
= elf_elfheader (abfd
)->e_shnum
;
475 for (i
= 1; i
< max
; i
++)
476 if (!strcmp (&shstrtab
[i_shdrp
[i
]->sh_name
], name
))
483 const char *const bfd_elf_section_type_names
[] = {
484 "SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB",
485 "SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE",
486 "SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM",
489 /* ELF relocs are against symbols. If we are producing relocateable
490 output, and the reloc is against an external symbol, and nothing
491 has given us any additional addend, the resulting reloc will also
492 be against the same symbol. In such a case, we don't want to
493 change anything about the way the reloc is handled, since it will
494 all be done at final link time. Rather than put special case code
495 into bfd_perform_relocation, all the reloc types use this howto
496 function. It just short circuits the reloc if producing
497 relocateable output against an external symbol. */
500 bfd_reloc_status_type
501 bfd_elf_generic_reloc (abfd
,
508 bfd
*abfd ATTRIBUTE_UNUSED
;
509 arelent
*reloc_entry
;
511 PTR data ATTRIBUTE_UNUSED
;
512 asection
*input_section
;
514 char **error_message ATTRIBUTE_UNUSED
;
516 if (output_bfd
!= (bfd
*) NULL
517 && (symbol
->flags
& BSF_SECTION_SYM
) == 0
518 && (! reloc_entry
->howto
->partial_inplace
519 || reloc_entry
->addend
== 0))
521 reloc_entry
->address
+= input_section
->output_offset
;
525 return bfd_reloc_continue
;
528 /* Print out the program headers. */
531 _bfd_elf_print_private_bfd_data (abfd
, farg
)
535 FILE *f
= (FILE *) farg
;
536 Elf_Internal_Phdr
*p
;
538 bfd_byte
*dynbuf
= NULL
;
540 p
= elf_tdata (abfd
)->phdr
;
545 fprintf (f
, _("\nProgram Header:\n"));
546 c
= elf_elfheader (abfd
)->e_phnum
;
547 for (i
= 0; i
< c
; i
++, p
++)
554 case PT_NULL
: s
= "NULL"; break;
555 case PT_LOAD
: s
= "LOAD"; break;
556 case PT_DYNAMIC
: s
= "DYNAMIC"; break;
557 case PT_INTERP
: s
= "INTERP"; break;
558 case PT_NOTE
: s
= "NOTE"; break;
559 case PT_SHLIB
: s
= "SHLIB"; break;
560 case PT_PHDR
: s
= "PHDR"; break;
561 default: sprintf (buf
, "0x%lx", p
->p_type
); s
= buf
; break;
563 fprintf (f
, "%8s off 0x", s
);
564 fprintf_vma (f
, p
->p_offset
);
565 fprintf (f
, " vaddr 0x");
566 fprintf_vma (f
, p
->p_vaddr
);
567 fprintf (f
, " paddr 0x");
568 fprintf_vma (f
, p
->p_paddr
);
569 fprintf (f
, " align 2**%u\n", bfd_log2 (p
->p_align
));
570 fprintf (f
, " filesz 0x");
571 fprintf_vma (f
, p
->p_filesz
);
572 fprintf (f
, " memsz 0x");
573 fprintf_vma (f
, p
->p_memsz
);
574 fprintf (f
, " flags %c%c%c",
575 (p
->p_flags
& PF_R
) != 0 ? 'r' : '-',
576 (p
->p_flags
& PF_W
) != 0 ? 'w' : '-',
577 (p
->p_flags
& PF_X
) != 0 ? 'x' : '-');
578 if ((p
->p_flags
&~ (PF_R
| PF_W
| PF_X
)) != 0)
579 fprintf (f
, " %lx", p
->p_flags
&~ (PF_R
| PF_W
| PF_X
));
584 s
= bfd_get_section_by_name (abfd
, ".dynamic");
589 bfd_byte
*extdyn
, *extdynend
;
591 void (*swap_dyn_in
) PARAMS ((bfd
*, const PTR
, Elf_Internal_Dyn
*));
593 fprintf (f
, _("\nDynamic Section:\n"));
595 dynbuf
= (bfd_byte
*) bfd_malloc (s
->_raw_size
);
598 if (! bfd_get_section_contents (abfd
, s
, (PTR
) dynbuf
, (file_ptr
) 0,
602 elfsec
= _bfd_elf_section_from_bfd_section (abfd
, s
);
605 link
= elf_elfsections (abfd
)[elfsec
]->sh_link
;
607 extdynsize
= get_elf_backend_data (abfd
)->s
->sizeof_dyn
;
608 swap_dyn_in
= get_elf_backend_data (abfd
)->s
->swap_dyn_in
;
611 extdynend
= extdyn
+ s
->_raw_size
;
612 for (; extdyn
< extdynend
; extdyn
+= extdynsize
)
614 Elf_Internal_Dyn dyn
;
619 (*swap_dyn_in
) (abfd
, (PTR
) extdyn
, &dyn
);
621 if (dyn
.d_tag
== DT_NULL
)
628 sprintf (ab
, "0x%lx", (unsigned long) dyn
.d_tag
);
632 case DT_NEEDED
: name
= "NEEDED"; stringp
= true; break;
633 case DT_PLTRELSZ
: name
= "PLTRELSZ"; break;
634 case DT_PLTGOT
: name
= "PLTGOT"; break;
635 case DT_HASH
: name
= "HASH"; break;
636 case DT_STRTAB
: name
= "STRTAB"; break;
637 case DT_SYMTAB
: name
= "SYMTAB"; break;
638 case DT_RELA
: name
= "RELA"; break;
639 case DT_RELASZ
: name
= "RELASZ"; break;
640 case DT_RELAENT
: name
= "RELAENT"; break;
641 case DT_STRSZ
: name
= "STRSZ"; break;
642 case DT_SYMENT
: name
= "SYMENT"; break;
643 case DT_INIT
: name
= "INIT"; break;
644 case DT_FINI
: name
= "FINI"; break;
645 case DT_SONAME
: name
= "SONAME"; stringp
= true; break;
646 case DT_RPATH
: name
= "RPATH"; stringp
= true; break;
647 case DT_SYMBOLIC
: name
= "SYMBOLIC"; break;
648 case DT_REL
: name
= "REL"; break;
649 case DT_RELSZ
: name
= "RELSZ"; break;
650 case DT_RELENT
: name
= "RELENT"; break;
651 case DT_PLTREL
: name
= "PLTREL"; break;
652 case DT_DEBUG
: name
= "DEBUG"; break;
653 case DT_TEXTREL
: name
= "TEXTREL"; break;
654 case DT_JMPREL
: name
= "JMPREL"; break;
655 case DT_AUXILIARY
: name
= "AUXILIARY"; stringp
= true; break;
656 case DT_FILTER
: name
= "FILTER"; stringp
= true; break;
657 case DT_VERSYM
: name
= "VERSYM"; break;
658 case DT_VERDEF
: name
= "VERDEF"; break;
659 case DT_VERDEFNUM
: name
= "VERDEFNUM"; break;
660 case DT_VERNEED
: name
= "VERNEED"; break;
661 case DT_VERNEEDNUM
: name
= "VERNEEDNUM"; break;
664 fprintf (f
, " %-11s ", name
);
666 fprintf (f
, "0x%lx", (unsigned long) dyn
.d_un
.d_val
);
671 string
= bfd_elf_string_from_elf_section (abfd
, link
,
675 fprintf (f
, "%s", string
);
684 if ((elf_dynverdef (abfd
) != 0 && elf_tdata (abfd
)->verdef
== NULL
)
685 || (elf_dynverref (abfd
) != 0 && elf_tdata (abfd
)->verref
== NULL
))
687 if (! _bfd_elf_slurp_version_tables (abfd
))
691 if (elf_dynverdef (abfd
) != 0)
693 Elf_Internal_Verdef
*t
;
695 fprintf (f
, _("\nVersion definitions:\n"));
696 for (t
= elf_tdata (abfd
)->verdef
; t
!= NULL
; t
= t
->vd_nextdef
)
698 fprintf (f
, "%d 0x%2.2x 0x%8.8lx %s\n", t
->vd_ndx
,
699 t
->vd_flags
, t
->vd_hash
, t
->vd_nodename
);
700 if (t
->vd_auxptr
->vda_nextptr
!= NULL
)
702 Elf_Internal_Verdaux
*a
;
705 for (a
= t
->vd_auxptr
->vda_nextptr
;
708 fprintf (f
, "%s ", a
->vda_nodename
);
714 if (elf_dynverref (abfd
) != 0)
716 Elf_Internal_Verneed
*t
;
718 fprintf (f
, _("\nVersion References:\n"));
719 for (t
= elf_tdata (abfd
)->verref
; t
!= NULL
; t
= t
->vn_nextref
)
721 Elf_Internal_Vernaux
*a
;
723 fprintf (f
, _(" required from %s:\n"), t
->vn_filename
);
724 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
725 fprintf (f
, " 0x%8.8lx 0x%2.2x %2.2d %s\n", a
->vna_hash
,
726 a
->vna_flags
, a
->vna_other
, a
->vna_nodename
);
738 /* Display ELF-specific fields of a symbol. */
741 bfd_elf_print_symbol (abfd
, filep
, symbol
, how
)
745 bfd_print_symbol_type how
;
747 FILE *file
= (FILE *) filep
;
750 case bfd_print_symbol_name
:
751 fprintf (file
, "%s", symbol
->name
);
753 case bfd_print_symbol_more
:
754 fprintf (file
, "elf ");
755 fprintf_vma (file
, symbol
->value
);
756 fprintf (file
, " %lx", (long) symbol
->flags
);
758 case bfd_print_symbol_all
:
760 CONST
char *section_name
;
761 CONST
char *name
= NULL
;
762 struct elf_backend_data
*bed
;
764 section_name
= symbol
->section
? symbol
->section
->name
: "(*none*)";
766 bed
= get_elf_backend_data (abfd
);
767 if (bed
->elf_backend_print_symbol_all
)
768 name
= (*bed
->elf_backend_print_symbol_all
) (abfd
, filep
, symbol
);
773 bfd_print_symbol_vandf ((PTR
) file
, symbol
);
776 fprintf (file
, " %s\t", section_name
);
777 /* Print the "other" value for a symbol. For common symbols,
778 we've already printed the size; now print the alignment.
779 For other symbols, we have no specified alignment, and
780 we've printed the address; now print the size. */
782 (bfd_is_com_section (symbol
->section
)
783 ? ((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_value
784 : ((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_size
));
786 /* If we have version information, print it. */
787 if (elf_tdata (abfd
)->dynversym_section
!= 0
788 && (elf_tdata (abfd
)->dynverdef_section
!= 0
789 || elf_tdata (abfd
)->dynverref_section
!= 0))
792 const char *version_string
;
794 vernum
= ((elf_symbol_type
*) symbol
)->version
& VERSYM_VERSION
;
798 else if (vernum
== 1)
799 version_string
= "Base";
800 else if (vernum
<= elf_tdata (abfd
)->cverdefs
)
802 elf_tdata (abfd
)->verdef
[vernum
- 1].vd_nodename
;
805 Elf_Internal_Verneed
*t
;
808 for (t
= elf_tdata (abfd
)->verref
;
812 Elf_Internal_Vernaux
*a
;
814 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
816 if (a
->vna_other
== vernum
)
818 version_string
= a
->vna_nodename
;
825 if ((((elf_symbol_type
*) symbol
)->version
& VERSYM_HIDDEN
) == 0)
826 fprintf (file
, " %-11s", version_string
);
831 fprintf (file
, " (%s)", version_string
);
832 for (i
= 10 - strlen (version_string
); i
> 0; --i
)
837 /* If the st_other field is not zero, print it. */
838 if (((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_other
!= 0)
839 fprintf (file
, " 0x%02x",
841 ((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_other
));
843 fprintf (file
, " %s", name
);
849 /* Create an entry in an ELF linker hash table. */
851 struct bfd_hash_entry
*
852 _bfd_elf_link_hash_newfunc (entry
, table
, string
)
853 struct bfd_hash_entry
*entry
;
854 struct bfd_hash_table
*table
;
857 struct elf_link_hash_entry
*ret
= (struct elf_link_hash_entry
*) entry
;
859 /* Allocate the structure if it has not already been allocated by a
861 if (ret
== (struct elf_link_hash_entry
*) NULL
)
862 ret
= ((struct elf_link_hash_entry
*)
863 bfd_hash_allocate (table
, sizeof (struct elf_link_hash_entry
)));
864 if (ret
== (struct elf_link_hash_entry
*) NULL
)
865 return (struct bfd_hash_entry
*) ret
;
867 /* Call the allocation method of the superclass. */
868 ret
= ((struct elf_link_hash_entry
*)
869 _bfd_link_hash_newfunc ((struct bfd_hash_entry
*) ret
,
871 if (ret
!= (struct elf_link_hash_entry
*) NULL
)
873 /* Set local fields. */
877 ret
->dynstr_index
= 0;
879 ret
->got
.offset
= (bfd_vma
) -1;
880 ret
->plt
.offset
= (bfd_vma
) -1;
881 ret
->linker_section_pointer
= (elf_linker_section_pointers_t
*)0;
882 ret
->verinfo
.verdef
= NULL
;
883 ret
->vtable_entries_used
= NULL
;
884 ret
->vtable_entries_size
= 0;
885 ret
->vtable_parent
= NULL
;
886 ret
->type
= STT_NOTYPE
;
888 /* Assume that we have been called by a non-ELF symbol reader.
889 This flag is then reset by the code which reads an ELF input
890 file. This ensures that a symbol created by a non-ELF symbol
891 reader will have the flag set correctly. */
892 ret
->elf_link_hash_flags
= ELF_LINK_NON_ELF
;
895 return (struct bfd_hash_entry
*) ret
;
898 /* Initialize an ELF linker hash table. */
901 _bfd_elf_link_hash_table_init (table
, abfd
, newfunc
)
902 struct elf_link_hash_table
*table
;
904 struct bfd_hash_entry
*(*newfunc
) PARAMS ((struct bfd_hash_entry
*,
905 struct bfd_hash_table
*,
908 table
->dynamic_sections_created
= false;
909 table
->dynobj
= NULL
;
910 /* The first dynamic symbol is a dummy. */
911 table
->dynsymcount
= 1;
912 table
->dynstr
= NULL
;
913 table
->bucketcount
= 0;
914 table
->needed
= NULL
;
916 table
->stab_info
= NULL
;
917 return _bfd_link_hash_table_init (&table
->root
, abfd
, newfunc
);
920 /* Create an ELF linker hash table. */
922 struct bfd_link_hash_table
*
923 _bfd_elf_link_hash_table_create (abfd
)
926 struct elf_link_hash_table
*ret
;
928 ret
= ((struct elf_link_hash_table
*)
929 bfd_alloc (abfd
, sizeof (struct elf_link_hash_table
)));
930 if (ret
== (struct elf_link_hash_table
*) NULL
)
933 if (! _bfd_elf_link_hash_table_init (ret
, abfd
, _bfd_elf_link_hash_newfunc
))
935 bfd_release (abfd
, ret
);
942 /* This is a hook for the ELF emulation code in the generic linker to
943 tell the backend linker what file name to use for the DT_NEEDED
944 entry for a dynamic object. The generic linker passes name as an
945 empty string to indicate that no DT_NEEDED entry should be made. */
948 bfd_elf_set_dt_needed_name (abfd
, name
)
952 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
953 && bfd_get_format (abfd
) == bfd_object
)
954 elf_dt_name (abfd
) = name
;
957 /* Get the list of DT_NEEDED entries for a link. This is a hook for
958 the linker ELF emulation code. */
960 struct bfd_link_needed_list
*
961 bfd_elf_get_needed_list (abfd
, info
)
962 bfd
*abfd ATTRIBUTE_UNUSED
;
963 struct bfd_link_info
*info
;
965 if (info
->hash
->creator
->flavour
!= bfd_target_elf_flavour
)
967 return elf_hash_table (info
)->needed
;
970 /* Get the name actually used for a dynamic object for a link. This
971 is the SONAME entry if there is one. Otherwise, it is the string
972 passed to bfd_elf_set_dt_needed_name, or it is the filename. */
975 bfd_elf_get_dt_soname (abfd
)
978 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
979 && bfd_get_format (abfd
) == bfd_object
)
980 return elf_dt_name (abfd
);
984 /* Get the list of DT_NEEDED entries from a BFD. This is a hook for
985 the ELF linker emulation code. */
988 bfd_elf_get_bfd_needed_list (abfd
, pneeded
)
990 struct bfd_link_needed_list
**pneeded
;
993 bfd_byte
*dynbuf
= NULL
;
996 bfd_byte
*extdyn
, *extdynend
;
998 void (*swap_dyn_in
) PARAMS ((bfd
*, const PTR
, Elf_Internal_Dyn
*));
1002 if (bfd_get_flavour (abfd
) != bfd_target_elf_flavour
1003 || bfd_get_format (abfd
) != bfd_object
)
1006 s
= bfd_get_section_by_name (abfd
, ".dynamic");
1007 if (s
== NULL
|| s
->_raw_size
== 0)
1010 dynbuf
= (bfd_byte
*) bfd_malloc (s
->_raw_size
);
1014 if (! bfd_get_section_contents (abfd
, s
, (PTR
) dynbuf
, (file_ptr
) 0,
1018 elfsec
= _bfd_elf_section_from_bfd_section (abfd
, s
);
1022 link
= elf_elfsections (abfd
)[elfsec
]->sh_link
;
1024 extdynsize
= get_elf_backend_data (abfd
)->s
->sizeof_dyn
;
1025 swap_dyn_in
= get_elf_backend_data (abfd
)->s
->swap_dyn_in
;
1028 extdynend
= extdyn
+ s
->_raw_size
;
1029 for (; extdyn
< extdynend
; extdyn
+= extdynsize
)
1031 Elf_Internal_Dyn dyn
;
1033 (*swap_dyn_in
) (abfd
, (PTR
) extdyn
, &dyn
);
1035 if (dyn
.d_tag
== DT_NULL
)
1038 if (dyn
.d_tag
== DT_NEEDED
)
1041 struct bfd_link_needed_list
*l
;
1043 string
= bfd_elf_string_from_elf_section (abfd
, link
,
1048 l
= (struct bfd_link_needed_list
*) bfd_alloc (abfd
, sizeof *l
);
1069 /* Allocate an ELF string table--force the first byte to be zero. */
1071 struct bfd_strtab_hash
*
1072 _bfd_elf_stringtab_init ()
1074 struct bfd_strtab_hash
*ret
;
1076 ret
= _bfd_stringtab_init ();
1081 loc
= _bfd_stringtab_add (ret
, "", true, false);
1082 BFD_ASSERT (loc
== 0 || loc
== (bfd_size_type
) -1);
1083 if (loc
== (bfd_size_type
) -1)
1085 _bfd_stringtab_free (ret
);
1092 /* ELF .o/exec file reading */
1094 /* Create a new bfd section from an ELF section header. */
1097 bfd_section_from_shdr (abfd
, shindex
)
1099 unsigned int shindex
;
1101 Elf_Internal_Shdr
*hdr
= elf_elfsections (abfd
)[shindex
];
1102 Elf_Internal_Ehdr
*ehdr
= elf_elfheader (abfd
);
1103 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
1106 name
= elf_string_from_elf_strtab (abfd
, hdr
->sh_name
);
1108 switch (hdr
->sh_type
)
1111 /* Inactive section. Throw it away. */
1114 case SHT_PROGBITS
: /* Normal section with contents. */
1115 case SHT_DYNAMIC
: /* Dynamic linking information. */
1116 case SHT_NOBITS
: /* .bss section. */
1117 case SHT_HASH
: /* .hash section. */
1118 case SHT_NOTE
: /* .note section. */
1119 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1121 case SHT_SYMTAB
: /* A symbol table */
1122 if (elf_onesymtab (abfd
) == shindex
)
1125 BFD_ASSERT (hdr
->sh_entsize
== bed
->s
->sizeof_sym
);
1126 BFD_ASSERT (elf_onesymtab (abfd
) == 0);
1127 elf_onesymtab (abfd
) = shindex
;
1128 elf_tdata (abfd
)->symtab_hdr
= *hdr
;
1129 elf_elfsections (abfd
)[shindex
] = hdr
= &elf_tdata (abfd
)->symtab_hdr
;
1130 abfd
->flags
|= HAS_SYMS
;
1132 /* Sometimes a shared object will map in the symbol table. If
1133 SHF_ALLOC is set, and this is a shared object, then we also
1134 treat this section as a BFD section. We can not base the
1135 decision purely on SHF_ALLOC, because that flag is sometimes
1136 set in a relocateable object file, which would confuse the
1138 if ((hdr
->sh_flags
& SHF_ALLOC
) != 0
1139 && (abfd
->flags
& DYNAMIC
) != 0
1140 && ! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
))
1145 case SHT_DYNSYM
: /* A dynamic symbol table */
1146 if (elf_dynsymtab (abfd
) == shindex
)
1149 BFD_ASSERT (hdr
->sh_entsize
== bed
->s
->sizeof_sym
);
1150 BFD_ASSERT (elf_dynsymtab (abfd
) == 0);
1151 elf_dynsymtab (abfd
) = shindex
;
1152 elf_tdata (abfd
)->dynsymtab_hdr
= *hdr
;
1153 elf_elfsections (abfd
)[shindex
] = hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
1154 abfd
->flags
|= HAS_SYMS
;
1156 /* Besides being a symbol table, we also treat this as a regular
1157 section, so that objcopy can handle it. */
1158 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1160 case SHT_STRTAB
: /* A string table */
1161 if (hdr
->bfd_section
!= NULL
)
1163 if (ehdr
->e_shstrndx
== shindex
)
1165 elf_tdata (abfd
)->shstrtab_hdr
= *hdr
;
1166 elf_elfsections (abfd
)[shindex
] = &elf_tdata (abfd
)->shstrtab_hdr
;
1172 for (i
= 1; i
< ehdr
->e_shnum
; i
++)
1174 Elf_Internal_Shdr
*hdr2
= elf_elfsections (abfd
)[i
];
1175 if (hdr2
->sh_link
== shindex
)
1177 if (! bfd_section_from_shdr (abfd
, i
))
1179 if (elf_onesymtab (abfd
) == i
)
1181 elf_tdata (abfd
)->strtab_hdr
= *hdr
;
1182 elf_elfsections (abfd
)[shindex
] =
1183 &elf_tdata (abfd
)->strtab_hdr
;
1186 if (elf_dynsymtab (abfd
) == i
)
1188 elf_tdata (abfd
)->dynstrtab_hdr
= *hdr
;
1189 elf_elfsections (abfd
)[shindex
] = hdr
=
1190 &elf_tdata (abfd
)->dynstrtab_hdr
;
1191 /* We also treat this as a regular section, so
1192 that objcopy can handle it. */
1195 #if 0 /* Not handling other string tables specially right now. */
1196 hdr2
= elf_elfsections (abfd
)[i
]; /* in case it moved */
1197 /* We have a strtab for some random other section. */
1198 newsect
= (asection
*) hdr2
->bfd_section
;
1201 hdr
->bfd_section
= newsect
;
1202 hdr2
= &elf_section_data (newsect
)->str_hdr
;
1204 elf_elfsections (abfd
)[shindex
] = hdr2
;
1210 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1214 /* *These* do a lot of work -- but build no sections! */
1216 asection
*target_sect
;
1217 Elf_Internal_Shdr
*hdr2
;
1219 /* Check for a bogus link to avoid crashing. */
1220 if (hdr
->sh_link
>= ehdr
->e_shnum
)
1222 ((*_bfd_error_handler
)
1223 (_("%s: invalid link %lu for reloc section %s (index %u)"),
1224 bfd_get_filename (abfd
), hdr
->sh_link
, name
, shindex
));
1225 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1228 /* For some incomprehensible reason Oracle distributes
1229 libraries for Solaris in which some of the objects have
1230 bogus sh_link fields. It would be nice if we could just
1231 reject them, but, unfortunately, some people need to use
1232 them. We scan through the section headers; if we find only
1233 one suitable symbol table, we clobber the sh_link to point
1234 to it. I hope this doesn't break anything. */
1235 if (elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_SYMTAB
1236 && elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_DYNSYM
)
1242 for (scan
= 1; scan
< ehdr
->e_shnum
; scan
++)
1244 if (elf_elfsections (abfd
)[scan
]->sh_type
== SHT_SYMTAB
1245 || elf_elfsections (abfd
)[scan
]->sh_type
== SHT_DYNSYM
)
1256 hdr
->sh_link
= found
;
1259 /* Get the symbol table. */
1260 if (elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
== SHT_SYMTAB
1261 && ! bfd_section_from_shdr (abfd
, hdr
->sh_link
))
1264 /* If this reloc section does not use the main symbol table we
1265 don't treat it as a reloc section. BFD can't adequately
1266 represent such a section, so at least for now, we don't
1267 try. We just present it as a normal section. */
1268 if (hdr
->sh_link
!= elf_onesymtab (abfd
))
1269 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1271 if (! bfd_section_from_shdr (abfd
, hdr
->sh_info
))
1273 target_sect
= bfd_section_from_elf_index (abfd
, hdr
->sh_info
);
1274 if (target_sect
== NULL
)
1277 if ((target_sect
->flags
& SEC_RELOC
) == 0
1278 || target_sect
->reloc_count
== 0)
1279 hdr2
= &elf_section_data (target_sect
)->rel_hdr
;
1282 BFD_ASSERT (elf_section_data (target_sect
)->rel_hdr2
== NULL
);
1283 hdr2
= (Elf_Internal_Shdr
*) bfd_alloc (abfd
, sizeof (*hdr2
));
1284 elf_section_data (target_sect
)->rel_hdr2
= hdr2
;
1287 elf_elfsections (abfd
)[shindex
] = hdr2
;
1288 target_sect
->reloc_count
+= hdr
->sh_size
/ hdr
->sh_entsize
;
1289 target_sect
->flags
|= SEC_RELOC
;
1290 target_sect
->relocation
= NULL
;
1291 target_sect
->rel_filepos
= hdr
->sh_offset
;
1292 /* In the section to which the relocations apply, mark whether
1293 its relocations are of the REL or RELA variety. */
1294 elf_section_data (target_sect
)->use_rela_p
1295 = (hdr
->sh_type
== SHT_RELA
);
1296 abfd
->flags
|= HAS_RELOC
;
1301 case SHT_GNU_verdef
:
1302 elf_dynverdef (abfd
) = shindex
;
1303 elf_tdata (abfd
)->dynverdef_hdr
= *hdr
;
1304 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1307 case SHT_GNU_versym
:
1308 elf_dynversym (abfd
) = shindex
;
1309 elf_tdata (abfd
)->dynversym_hdr
= *hdr
;
1310 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1313 case SHT_GNU_verneed
:
1314 elf_dynverref (abfd
) = shindex
;
1315 elf_tdata (abfd
)->dynverref_hdr
= *hdr
;
1316 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1323 /* Check for any processor-specific section types. */
1325 if (bed
->elf_backend_section_from_shdr
)
1326 (*bed
->elf_backend_section_from_shdr
) (abfd
, hdr
, name
);
1334 /* Given an ELF section number, retrieve the corresponding BFD
1338 bfd_section_from_elf_index (abfd
, index
)
1342 BFD_ASSERT (index
> 0 && index
< SHN_LORESERVE
);
1343 if (index
>= elf_elfheader (abfd
)->e_shnum
)
1345 return elf_elfsections (abfd
)[index
]->bfd_section
;
1349 _bfd_elf_new_section_hook (abfd
, sec
)
1353 struct bfd_elf_section_data
*sdata
;
1355 sdata
= (struct bfd_elf_section_data
*) bfd_zalloc (abfd
, sizeof (*sdata
));
1358 sec
->used_by_bfd
= (PTR
) sdata
;
1360 /* Indicate whether or not this section should use RELA relocations. */
1362 = get_elf_backend_data (abfd
)->default_use_rela_p
;
1367 /* Create a new bfd section from an ELF program header.
1369 Since program segments have no names, we generate a synthetic name
1370 of the form segment<NUM>, where NUM is generally the index in the
1371 program header table. For segments that are split (see below) we
1372 generate the names segment<NUM>a and segment<NUM>b.
1374 Note that some program segments may have a file size that is different than
1375 (less than) the memory size. All this means is that at execution the
1376 system must allocate the amount of memory specified by the memory size,
1377 but only initialize it with the first "file size" bytes read from the
1378 file. This would occur for example, with program segments consisting
1379 of combined data+bss.
1381 To handle the above situation, this routine generates TWO bfd sections
1382 for the single program segment. The first has the length specified by
1383 the file size of the segment, and the second has the length specified
1384 by the difference between the two sizes. In effect, the segment is split
1385 into it's initialized and uninitialized parts.
1390 bfd_section_from_phdr (abfd
, hdr
, index
)
1392 Elf_Internal_Phdr
*hdr
;
1401 split
= ((hdr
->p_memsz
> 0)
1402 && (hdr
->p_filesz
> 0)
1403 && (hdr
->p_memsz
> hdr
->p_filesz
));
1404 switch (hdr
->p_type
)
1406 case PT_NULL
: typename
= "null"; break;
1407 case PT_LOAD
: typename
= "load"; break;
1408 case PT_DYNAMIC
: typename
= "dynamic"; break;
1409 case PT_INTERP
: typename
= "interp"; break;
1410 case PT_NOTE
: typename
= "note"; break;
1411 case PT_SHLIB
: typename
= "shlib"; break;
1412 case PT_PHDR
: typename
= "phdr"; break;
1413 default: typename
= "segment"; break;
1415 sprintf (namebuf
, "%s%d%s", typename
, index
, split
? "a" : "");
1416 name
= bfd_alloc (abfd
, strlen (namebuf
) + 1);
1419 strcpy (name
, namebuf
);
1420 newsect
= bfd_make_section (abfd
, name
);
1421 if (newsect
== NULL
)
1423 newsect
->vma
= hdr
->p_vaddr
;
1424 newsect
->lma
= hdr
->p_paddr
;
1425 newsect
->_raw_size
= hdr
->p_filesz
;
1426 newsect
->filepos
= hdr
->p_offset
;
1427 newsect
->flags
|= SEC_HAS_CONTENTS
;
1428 if (hdr
->p_type
== PT_LOAD
)
1430 newsect
->flags
|= SEC_ALLOC
;
1431 newsect
->flags
|= SEC_LOAD
;
1432 if (hdr
->p_flags
& PF_X
)
1434 /* FIXME: all we known is that it has execute PERMISSION,
1436 newsect
->flags
|= SEC_CODE
;
1439 if (!(hdr
->p_flags
& PF_W
))
1441 newsect
->flags
|= SEC_READONLY
;
1446 sprintf (namebuf
, "%s%db", typename
, index
);
1447 name
= bfd_alloc (abfd
, strlen (namebuf
) + 1);
1450 strcpy (name
, namebuf
);
1451 newsect
= bfd_make_section (abfd
, name
);
1452 if (newsect
== NULL
)
1454 newsect
->vma
= hdr
->p_vaddr
+ hdr
->p_filesz
;
1455 newsect
->lma
= hdr
->p_paddr
+ hdr
->p_filesz
;
1456 newsect
->_raw_size
= hdr
->p_memsz
- hdr
->p_filesz
;
1457 if (hdr
->p_type
== PT_LOAD
)
1459 newsect
->flags
|= SEC_ALLOC
;
1460 if (hdr
->p_flags
& PF_X
)
1461 newsect
->flags
|= SEC_CODE
;
1463 if (!(hdr
->p_flags
& PF_W
))
1464 newsect
->flags
|= SEC_READONLY
;
1470 /* Initialize REL_HDR, the section-header for new section, containing
1471 relocations against ASECT. If USE_RELA_P is true, we use RELA
1472 relocations; otherwise, we use REL relocations. */
1475 _bfd_elf_init_reloc_shdr (abfd
, rel_hdr
, asect
, use_rela_p
)
1477 Elf_Internal_Shdr
*rel_hdr
;
1482 struct elf_backend_data
*bed
;
1484 bed
= get_elf_backend_data (abfd
);
1485 name
= bfd_alloc (abfd
, sizeof ".rela" + strlen (asect
->name
));
1488 sprintf (name
, "%s%s", use_rela_p
? ".rela" : ".rel", asect
->name
);
1490 (unsigned int) _bfd_stringtab_add (elf_shstrtab (abfd
), name
,
1492 if (rel_hdr
->sh_name
== (unsigned int) -1)
1494 rel_hdr
->sh_type
= use_rela_p
? SHT_RELA
: SHT_REL
;
1495 rel_hdr
->sh_entsize
= (use_rela_p
1496 ? bed
->s
->sizeof_rela
1497 : bed
->s
->sizeof_rel
);
1498 rel_hdr
->sh_addralign
= bed
->s
->file_align
;
1499 rel_hdr
->sh_flags
= 0;
1500 rel_hdr
->sh_addr
= 0;
1501 rel_hdr
->sh_size
= 0;
1502 rel_hdr
->sh_offset
= 0;
1507 /* Set up an ELF internal section header for a section. */
1511 elf_fake_sections (abfd
, asect
, failedptrarg
)
1516 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
1517 boolean
*failedptr
= (boolean
*) failedptrarg
;
1518 Elf_Internal_Shdr
*this_hdr
;
1522 /* We already failed; just get out of the bfd_map_over_sections
1527 this_hdr
= &elf_section_data (asect
)->this_hdr
;
1529 this_hdr
->sh_name
= (unsigned long) _bfd_stringtab_add (elf_shstrtab (abfd
),
1532 if (this_hdr
->sh_name
== (unsigned long) -1)
1538 this_hdr
->sh_flags
= 0;
1540 if ((asect
->flags
& SEC_ALLOC
) != 0
1541 || asect
->user_set_vma
)
1542 this_hdr
->sh_addr
= asect
->vma
;
1544 this_hdr
->sh_addr
= 0;
1546 this_hdr
->sh_offset
= 0;
1547 this_hdr
->sh_size
= asect
->_raw_size
;
1548 this_hdr
->sh_link
= 0;
1549 this_hdr
->sh_addralign
= 1 << asect
->alignment_power
;
1550 /* The sh_entsize and sh_info fields may have been set already by
1551 copy_private_section_data. */
1553 this_hdr
->bfd_section
= asect
;
1554 this_hdr
->contents
= NULL
;
1556 /* FIXME: This should not be based on section names. */
1557 if (strcmp (asect
->name
, ".dynstr") == 0)
1558 this_hdr
->sh_type
= SHT_STRTAB
;
1559 else if (strcmp (asect
->name
, ".hash") == 0)
1561 this_hdr
->sh_type
= SHT_HASH
;
1562 this_hdr
->sh_entsize
= bed
->s
->sizeof_hash_entry
;
1564 else if (strcmp (asect
->name
, ".dynsym") == 0)
1566 this_hdr
->sh_type
= SHT_DYNSYM
;
1567 this_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
1569 else if (strcmp (asect
->name
, ".dynamic") == 0)
1571 this_hdr
->sh_type
= SHT_DYNAMIC
;
1572 this_hdr
->sh_entsize
= bed
->s
->sizeof_dyn
;
1574 else if (strncmp (asect
->name
, ".rela", 5) == 0
1575 && get_elf_backend_data (abfd
)->may_use_rela_p
)
1577 this_hdr
->sh_type
= SHT_RELA
;
1578 this_hdr
->sh_entsize
= bed
->s
->sizeof_rela
;
1580 else if (strncmp (asect
->name
, ".rel", 4) == 0
1581 && get_elf_backend_data (abfd
)->may_use_rel_p
)
1583 this_hdr
->sh_type
= SHT_REL
;
1584 this_hdr
->sh_entsize
= bed
->s
->sizeof_rel
;
1586 else if (strncmp (asect
->name
, ".note", 5) == 0)
1587 this_hdr
->sh_type
= SHT_NOTE
;
1588 else if (strncmp (asect
->name
, ".stab", 5) == 0
1589 && strcmp (asect
->name
+ strlen (asect
->name
) - 3, "str") == 0)
1590 this_hdr
->sh_type
= SHT_STRTAB
;
1591 else if (strcmp (asect
->name
, ".gnu.version") == 0)
1593 this_hdr
->sh_type
= SHT_GNU_versym
;
1594 this_hdr
->sh_entsize
= sizeof (Elf_External_Versym
);
1596 else if (strcmp (asect
->name
, ".gnu.version_d") == 0)
1598 this_hdr
->sh_type
= SHT_GNU_verdef
;
1599 this_hdr
->sh_entsize
= 0;
1600 /* objcopy or strip will copy over sh_info, but may not set
1601 cverdefs. The linker will set cverdefs, but sh_info will be
1603 if (this_hdr
->sh_info
== 0)
1604 this_hdr
->sh_info
= elf_tdata (abfd
)->cverdefs
;
1606 BFD_ASSERT (elf_tdata (abfd
)->cverdefs
== 0
1607 || this_hdr
->sh_info
== elf_tdata (abfd
)->cverdefs
);
1609 else if (strcmp (asect
->name
, ".gnu.version_r") == 0)
1611 this_hdr
->sh_type
= SHT_GNU_verneed
;
1612 this_hdr
->sh_entsize
= 0;
1613 /* objcopy or strip will copy over sh_info, but may not set
1614 cverrefs. The linker will set cverrefs, but sh_info will be
1616 if (this_hdr
->sh_info
== 0)
1617 this_hdr
->sh_info
= elf_tdata (abfd
)->cverrefs
;
1619 BFD_ASSERT (elf_tdata (abfd
)->cverrefs
== 0
1620 || this_hdr
->sh_info
== elf_tdata (abfd
)->cverrefs
);
1622 else if ((asect
->flags
& SEC_ALLOC
) != 0
1623 && (asect
->flags
& SEC_LOAD
) != 0)
1624 this_hdr
->sh_type
= SHT_PROGBITS
;
1625 else if ((asect
->flags
& SEC_ALLOC
) != 0
1626 && ((asect
->flags
& SEC_LOAD
) == 0))
1627 this_hdr
->sh_type
= SHT_NOBITS
;
1631 this_hdr
->sh_type
= SHT_PROGBITS
;
1634 if ((asect
->flags
& SEC_ALLOC
) != 0)
1635 this_hdr
->sh_flags
|= SHF_ALLOC
;
1636 if ((asect
->flags
& SEC_READONLY
) == 0)
1637 this_hdr
->sh_flags
|= SHF_WRITE
;
1638 if ((asect
->flags
& SEC_CODE
) != 0)
1639 this_hdr
->sh_flags
|= SHF_EXECINSTR
;
1641 /* Check for processor-specific section types. */
1642 if (bed
->elf_backend_fake_sections
)
1643 (*bed
->elf_backend_fake_sections
) (abfd
, this_hdr
, asect
);
1645 /* If the section has relocs, set up a section header for the
1646 SHT_REL[A] section. If two relocation sections are required for
1647 this section, it is up to the processor-specific back-end to
1648 create the other. */
1649 if ((asect
->flags
& SEC_RELOC
) != 0
1650 && !_bfd_elf_init_reloc_shdr (abfd
,
1651 &elf_section_data (asect
)->rel_hdr
,
1653 elf_section_data (asect
)->use_rela_p
))
1657 /* Assign all ELF section numbers. The dummy first section is handled here
1658 too. The link/info pointers for the standard section types are filled
1659 in here too, while we're at it. */
1662 assign_section_numbers (abfd
)
1665 struct elf_obj_tdata
*t
= elf_tdata (abfd
);
1667 unsigned int section_number
;
1668 Elf_Internal_Shdr
**i_shdrp
;
1669 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
1673 for (sec
= abfd
->sections
; sec
; sec
= sec
->next
)
1675 struct bfd_elf_section_data
*d
= elf_section_data (sec
);
1677 d
->this_idx
= section_number
++;
1678 if ((sec
->flags
& SEC_RELOC
) == 0)
1681 d
->rel_idx
= section_number
++;
1684 d
->rel_idx2
= section_number
++;
1689 t
->shstrtab_section
= section_number
++;
1690 elf_elfheader (abfd
)->e_shstrndx
= t
->shstrtab_section
;
1691 t
->shstrtab_hdr
.sh_size
= _bfd_stringtab_size (elf_shstrtab (abfd
));
1693 if (bfd_get_symcount (abfd
) > 0)
1695 t
->symtab_section
= section_number
++;
1696 t
->strtab_section
= section_number
++;
1699 elf_elfheader (abfd
)->e_shnum
= section_number
;
1701 /* Set up the list of section header pointers, in agreement with the
1703 i_shdrp
= ((Elf_Internal_Shdr
**)
1704 bfd_alloc (abfd
, section_number
* sizeof (Elf_Internal_Shdr
*)));
1705 if (i_shdrp
== NULL
)
1708 i_shdrp
[0] = ((Elf_Internal_Shdr
*)
1709 bfd_alloc (abfd
, sizeof (Elf_Internal_Shdr
)));
1710 if (i_shdrp
[0] == NULL
)
1712 bfd_release (abfd
, i_shdrp
);
1715 memset (i_shdrp
[0], 0, sizeof (Elf_Internal_Shdr
));
1717 elf_elfsections (abfd
) = i_shdrp
;
1719 i_shdrp
[t
->shstrtab_section
] = &t
->shstrtab_hdr
;
1720 if (bfd_get_symcount (abfd
) > 0)
1722 i_shdrp
[t
->symtab_section
] = &t
->symtab_hdr
;
1723 i_shdrp
[t
->strtab_section
] = &t
->strtab_hdr
;
1724 t
->symtab_hdr
.sh_link
= t
->strtab_section
;
1726 for (sec
= abfd
->sections
; sec
; sec
= sec
->next
)
1728 struct bfd_elf_section_data
*d
= elf_section_data (sec
);
1732 i_shdrp
[d
->this_idx
] = &d
->this_hdr
;
1733 if (d
->rel_idx
!= 0)
1734 i_shdrp
[d
->rel_idx
] = &d
->rel_hdr
;
1735 if (d
->rel_idx2
!= 0)
1736 i_shdrp
[d
->rel_idx2
] = d
->rel_hdr2
;
1738 /* Fill in the sh_link and sh_info fields while we're at it. */
1740 /* sh_link of a reloc section is the section index of the symbol
1741 table. sh_info is the section index of the section to which
1742 the relocation entries apply. */
1743 if (d
->rel_idx
!= 0)
1745 d
->rel_hdr
.sh_link
= t
->symtab_section
;
1746 d
->rel_hdr
.sh_info
= d
->this_idx
;
1748 if (d
->rel_idx2
!= 0)
1750 d
->rel_hdr2
->sh_link
= t
->symtab_section
;
1751 d
->rel_hdr2
->sh_info
= d
->this_idx
;
1754 switch (d
->this_hdr
.sh_type
)
1758 /* A reloc section which we are treating as a normal BFD
1759 section. sh_link is the section index of the symbol
1760 table. sh_info is the section index of the section to
1761 which the relocation entries apply. We assume that an
1762 allocated reloc section uses the dynamic symbol table.
1763 FIXME: How can we be sure? */
1764 s
= bfd_get_section_by_name (abfd
, ".dynsym");
1766 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
1768 /* We look up the section the relocs apply to by name. */
1770 if (d
->this_hdr
.sh_type
== SHT_REL
)
1774 s
= bfd_get_section_by_name (abfd
, name
);
1776 d
->this_hdr
.sh_info
= elf_section_data (s
)->this_idx
;
1780 /* We assume that a section named .stab*str is a stabs
1781 string section. We look for a section with the same name
1782 but without the trailing ``str'', and set its sh_link
1783 field to point to this section. */
1784 if (strncmp (sec
->name
, ".stab", sizeof ".stab" - 1) == 0
1785 && strcmp (sec
->name
+ strlen (sec
->name
) - 3, "str") == 0)
1790 len
= strlen (sec
->name
);
1791 alc
= (char *) bfd_malloc (len
- 2);
1794 strncpy (alc
, sec
->name
, len
- 3);
1795 alc
[len
- 3] = '\0';
1796 s
= bfd_get_section_by_name (abfd
, alc
);
1800 elf_section_data (s
)->this_hdr
.sh_link
= d
->this_idx
;
1802 /* This is a .stab section. */
1803 elf_section_data (s
)->this_hdr
.sh_entsize
=
1804 4 + 2 * (bed
->s
->arch_size
/ 8);
1811 case SHT_GNU_verneed
:
1812 case SHT_GNU_verdef
:
1813 /* sh_link is the section header index of the string table
1814 used for the dynamic entries, or the symbol table, or the
1816 s
= bfd_get_section_by_name (abfd
, ".dynstr");
1818 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
1822 case SHT_GNU_versym
:
1823 /* sh_link is the section header index of the symbol table
1824 this hash table or version table is for. */
1825 s
= bfd_get_section_by_name (abfd
, ".dynsym");
1827 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
1835 /* Map symbol from it's internal number to the external number, moving
1836 all local symbols to be at the head of the list. */
1839 sym_is_global (abfd
, sym
)
1843 /* If the backend has a special mapping, use it. */
1844 if (get_elf_backend_data (abfd
)->elf_backend_sym_is_global
)
1845 return ((*get_elf_backend_data (abfd
)->elf_backend_sym_is_global
)
1848 return ((sym
->flags
& (BSF_GLOBAL
| BSF_WEAK
)) != 0
1849 || bfd_is_und_section (bfd_get_section (sym
))
1850 || bfd_is_com_section (bfd_get_section (sym
)));
1854 elf_map_symbols (abfd
)
1857 int symcount
= bfd_get_symcount (abfd
);
1858 asymbol
**syms
= bfd_get_outsymbols (abfd
);
1859 asymbol
**sect_syms
;
1861 int num_globals
= 0;
1862 int num_locals2
= 0;
1863 int num_globals2
= 0;
1865 int num_sections
= 0;
1872 fprintf (stderr
, "elf_map_symbols\n");
1876 /* Add a section symbol for each BFD section. FIXME: Is this really
1878 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
1880 if (max_index
< asect
->index
)
1881 max_index
= asect
->index
;
1885 sect_syms
= (asymbol
**) bfd_zalloc (abfd
, max_index
* sizeof (asymbol
*));
1886 if (sect_syms
== NULL
)
1888 elf_section_syms (abfd
) = sect_syms
;
1890 for (idx
= 0; idx
< symcount
; idx
++)
1894 if ((sym
->flags
& BSF_SECTION_SYM
) != 0
1901 if (sec
->owner
!= NULL
)
1903 if (sec
->owner
!= abfd
)
1905 if (sec
->output_offset
!= 0)
1908 sec
= sec
->output_section
;
1910 /* Empty sections in the input files may have had a section
1911 symbol created for them. (See the comment near the end of
1912 _bfd_generic_link_output_symbols in linker.c). If the linker
1913 script discards such sections then we will reach this point.
1914 Since we know that we cannot avoid this case, we detect it
1915 and skip the abort and the assignment to the sect_syms array.
1916 To reproduce this particular case try running the linker
1917 testsuite test ld-scripts/weak.exp for an ELF port that uses
1918 the generic linker. */
1919 if (sec
->owner
== NULL
)
1922 BFD_ASSERT (sec
->owner
== abfd
);
1924 sect_syms
[sec
->index
] = syms
[idx
];
1929 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
1931 if (sect_syms
[asect
->index
] != NULL
)
1934 sym
= bfd_make_empty_symbol (abfd
);
1937 sym
->the_bfd
= abfd
;
1938 sym
->name
= asect
->name
;
1940 /* Set the flags to 0 to indicate that this one was newly added. */
1942 sym
->section
= asect
;
1943 sect_syms
[asect
->index
] = sym
;
1947 _("creating section symbol, name = %s, value = 0x%.8lx, index = %d, section = 0x%.8lx\n"),
1948 asect
->name
, (long) asect
->vma
, asect
->index
, (long) asect
);
1952 /* Classify all of the symbols. */
1953 for (idx
= 0; idx
< symcount
; idx
++)
1955 if (!sym_is_global (abfd
, syms
[idx
]))
1960 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
1962 if (sect_syms
[asect
->index
] != NULL
1963 && sect_syms
[asect
->index
]->flags
== 0)
1965 sect_syms
[asect
->index
]->flags
= BSF_SECTION_SYM
;
1966 if (!sym_is_global (abfd
, sect_syms
[asect
->index
]))
1970 sect_syms
[asect
->index
]->flags
= 0;
1974 /* Now sort the symbols so the local symbols are first. */
1975 new_syms
= ((asymbol
**)
1977 (num_locals
+ num_globals
) * sizeof (asymbol
*)));
1978 if (new_syms
== NULL
)
1981 for (idx
= 0; idx
< symcount
; idx
++)
1983 asymbol
*sym
= syms
[idx
];
1986 if (!sym_is_global (abfd
, sym
))
1989 i
= num_locals
+ num_globals2
++;
1991 sym
->udata
.i
= i
+ 1;
1993 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
1995 if (sect_syms
[asect
->index
] != NULL
1996 && sect_syms
[asect
->index
]->flags
== 0)
1998 asymbol
*sym
= sect_syms
[asect
->index
];
2001 sym
->flags
= BSF_SECTION_SYM
;
2002 if (!sym_is_global (abfd
, sym
))
2005 i
= num_locals
+ num_globals2
++;
2007 sym
->udata
.i
= i
+ 1;
2011 bfd_set_symtab (abfd
, new_syms
, num_locals
+ num_globals
);
2013 elf_num_locals (abfd
) = num_locals
;
2014 elf_num_globals (abfd
) = num_globals
;
2018 /* Align to the maximum file alignment that could be required for any
2019 ELF data structure. */
2021 static INLINE file_ptr align_file_position
PARAMS ((file_ptr
, int));
2022 static INLINE file_ptr
2023 align_file_position (off
, align
)
2027 return (off
+ align
- 1) & ~(align
- 1);
2030 /* Assign a file position to a section, optionally aligning to the
2031 required section alignment. */
2034 _bfd_elf_assign_file_position_for_section (i_shdrp
, offset
, align
)
2035 Elf_Internal_Shdr
*i_shdrp
;
2043 al
= i_shdrp
->sh_addralign
;
2045 offset
= BFD_ALIGN (offset
, al
);
2047 i_shdrp
->sh_offset
= offset
;
2048 if (i_shdrp
->bfd_section
!= NULL
)
2049 i_shdrp
->bfd_section
->filepos
= offset
;
2050 if (i_shdrp
->sh_type
!= SHT_NOBITS
)
2051 offset
+= i_shdrp
->sh_size
;
2055 /* Compute the file positions we are going to put the sections at, and
2056 otherwise prepare to begin writing out the ELF file. If LINK_INFO
2057 is not NULL, this is being called by the ELF backend linker. */
2060 _bfd_elf_compute_section_file_positions (abfd
, link_info
)
2062 struct bfd_link_info
*link_info
;
2064 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2066 struct bfd_strtab_hash
*strtab
;
2067 Elf_Internal_Shdr
*shstrtab_hdr
;
2069 if (abfd
->output_has_begun
)
2072 /* Do any elf backend specific processing first. */
2073 if (bed
->elf_backend_begin_write_processing
)
2074 (*bed
->elf_backend_begin_write_processing
) (abfd
, link_info
);
2076 if (! prep_headers (abfd
))
2079 /* Post process the headers if necessary. */
2080 if (bed
->elf_backend_post_process_headers
)
2081 (*bed
->elf_backend_post_process_headers
) (abfd
, link_info
);
2084 bfd_map_over_sections (abfd
, elf_fake_sections
, &failed
);
2088 if (!assign_section_numbers (abfd
))
2091 /* The backend linker builds symbol table information itself. */
2092 if (link_info
== NULL
&& bfd_get_symcount (abfd
) > 0)
2094 /* Non-zero if doing a relocatable link. */
2095 int relocatable_p
= ! (abfd
->flags
& (EXEC_P
| DYNAMIC
));
2097 if (! swap_out_syms (abfd
, &strtab
, relocatable_p
))
2101 shstrtab_hdr
= &elf_tdata (abfd
)->shstrtab_hdr
;
2102 /* sh_name was set in prep_headers. */
2103 shstrtab_hdr
->sh_type
= SHT_STRTAB
;
2104 shstrtab_hdr
->sh_flags
= 0;
2105 shstrtab_hdr
->sh_addr
= 0;
2106 shstrtab_hdr
->sh_size
= _bfd_stringtab_size (elf_shstrtab (abfd
));
2107 shstrtab_hdr
->sh_entsize
= 0;
2108 shstrtab_hdr
->sh_link
= 0;
2109 shstrtab_hdr
->sh_info
= 0;
2110 /* sh_offset is set in assign_file_positions_except_relocs. */
2111 shstrtab_hdr
->sh_addralign
= 1;
2113 if (!assign_file_positions_except_relocs (abfd
))
2116 if (link_info
== NULL
&& bfd_get_symcount (abfd
) > 0)
2119 Elf_Internal_Shdr
*hdr
;
2121 off
= elf_tdata (abfd
)->next_file_pos
;
2123 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2124 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, true);
2126 hdr
= &elf_tdata (abfd
)->strtab_hdr
;
2127 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, true);
2129 elf_tdata (abfd
)->next_file_pos
= off
;
2131 /* Now that we know where the .strtab section goes, write it
2133 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
2134 || ! _bfd_stringtab_emit (abfd
, strtab
))
2136 _bfd_stringtab_free (strtab
);
2139 abfd
->output_has_begun
= true;
2144 /* Create a mapping from a set of sections to a program segment. */
2146 static INLINE
struct elf_segment_map
*
2147 make_mapping (abfd
, sections
, from
, to
, phdr
)
2149 asection
**sections
;
2154 struct elf_segment_map
*m
;
2158 m
= ((struct elf_segment_map
*)
2160 (sizeof (struct elf_segment_map
)
2161 + (to
- from
- 1) * sizeof (asection
*))));
2165 m
->p_type
= PT_LOAD
;
2166 for (i
= from
, hdrpp
= sections
+ from
; i
< to
; i
++, hdrpp
++)
2167 m
->sections
[i
- from
] = *hdrpp
;
2168 m
->count
= to
- from
;
2170 if (from
== 0 && phdr
)
2172 /* Include the headers in the first PT_LOAD segment. */
2173 m
->includes_filehdr
= 1;
2174 m
->includes_phdrs
= 1;
2180 /* Set up a mapping from BFD sections to program segments. */
2183 map_sections_to_segments (abfd
)
2186 asection
**sections
= NULL
;
2190 struct elf_segment_map
*mfirst
;
2191 struct elf_segment_map
**pm
;
2192 struct elf_segment_map
*m
;
2194 unsigned int phdr_index
;
2195 bfd_vma maxpagesize
;
2197 boolean phdr_in_segment
= true;
2201 if (elf_tdata (abfd
)->segment_map
!= NULL
)
2204 if (bfd_count_sections (abfd
) == 0)
2207 /* Select the allocated sections, and sort them. */
2209 sections
= (asection
**) bfd_malloc (bfd_count_sections (abfd
)
2210 * sizeof (asection
*));
2211 if (sections
== NULL
)
2215 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
2217 if ((s
->flags
& SEC_ALLOC
) != 0)
2223 BFD_ASSERT (i
<= bfd_count_sections (abfd
));
2226 qsort (sections
, (size_t) count
, sizeof (asection
*), elf_sort_sections
);
2228 /* Build the mapping. */
2233 /* If we have a .interp section, then create a PT_PHDR segment for
2234 the program headers and a PT_INTERP segment for the .interp
2236 s
= bfd_get_section_by_name (abfd
, ".interp");
2237 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0)
2239 m
= ((struct elf_segment_map
*)
2240 bfd_zalloc (abfd
, sizeof (struct elf_segment_map
)));
2244 m
->p_type
= PT_PHDR
;
2245 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
2246 m
->p_flags
= PF_R
| PF_X
;
2247 m
->p_flags_valid
= 1;
2248 m
->includes_phdrs
= 1;
2253 m
= ((struct elf_segment_map
*)
2254 bfd_zalloc (abfd
, sizeof (struct elf_segment_map
)));
2258 m
->p_type
= PT_INTERP
;
2266 /* Look through the sections. We put sections in the same program
2267 segment when the start of the second section can be placed within
2268 a few bytes of the end of the first section. */
2271 maxpagesize
= get_elf_backend_data (abfd
)->maxpagesize
;
2273 dynsec
= bfd_get_section_by_name (abfd
, ".dynamic");
2275 && (dynsec
->flags
& SEC_LOAD
) == 0)
2278 /* Deal with -Ttext or something similar such that the first section
2279 is not adjacent to the program headers. This is an
2280 approximation, since at this point we don't know exactly how many
2281 program headers we will need. */
2284 bfd_size_type phdr_size
;
2286 phdr_size
= elf_tdata (abfd
)->program_header_size
;
2288 phdr_size
= get_elf_backend_data (abfd
)->s
->sizeof_phdr
;
2289 if ((abfd
->flags
& D_PAGED
) == 0
2290 || sections
[0]->lma
< phdr_size
2291 || sections
[0]->lma
% maxpagesize
< phdr_size
% maxpagesize
)
2292 phdr_in_segment
= false;
2295 for (i
= 0, hdrpp
= sections
; i
< count
; i
++, hdrpp
++)
2298 boolean new_segment
;
2302 /* See if this section and the last one will fit in the same
2305 if (last_hdr
== NULL
)
2307 /* If we don't have a segment yet, then we don't need a new
2308 one (we build the last one after this loop). */
2309 new_segment
= false;
2311 else if (last_hdr
->lma
- last_hdr
->vma
!= hdr
->lma
- hdr
->vma
)
2313 /* If this section has a different relation between the
2314 virtual address and the load address, then we need a new
2318 else if (BFD_ALIGN (last_hdr
->lma
+ last_hdr
->_raw_size
, maxpagesize
)
2319 < BFD_ALIGN (hdr
->lma
, maxpagesize
))
2321 /* If putting this section in this segment would force us to
2322 skip a page in the segment, then we need a new segment. */
2325 else if ((last_hdr
->flags
& SEC_LOAD
) == 0
2326 && (hdr
->flags
& SEC_LOAD
) != 0)
2328 /* We don't want to put a loadable section after a
2329 nonloadable section in the same segment. */
2332 else if ((abfd
->flags
& D_PAGED
) == 0)
2334 /* If the file is not demand paged, which means that we
2335 don't require the sections to be correctly aligned in the
2336 file, then there is no other reason for a new segment. */
2337 new_segment
= false;
2340 && (hdr
->flags
& SEC_READONLY
) == 0
2341 && (BFD_ALIGN (last_hdr
->lma
+ last_hdr
->_raw_size
, maxpagesize
)
2344 /* We don't want to put a writable section in a read only
2345 segment, unless they are on the same page in memory
2346 anyhow. We already know that the last section does not
2347 bring us past the current section on the page, so the
2348 only case in which the new section is not on the same
2349 page as the previous section is when the previous section
2350 ends precisely on a page boundary. */
2355 /* Otherwise, we can use the same segment. */
2356 new_segment
= false;
2361 if ((hdr
->flags
& SEC_READONLY
) == 0)
2367 /* We need a new program segment. We must create a new program
2368 header holding all the sections from phdr_index until hdr. */
2370 m
= make_mapping (abfd
, sections
, phdr_index
, i
, phdr_in_segment
);
2377 if ((hdr
->flags
& SEC_READONLY
) == 0)
2384 phdr_in_segment
= false;
2387 /* Create a final PT_LOAD program segment. */
2388 if (last_hdr
!= NULL
)
2390 m
= make_mapping (abfd
, sections
, phdr_index
, i
, phdr_in_segment
);
2398 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
2401 m
= ((struct elf_segment_map
*)
2402 bfd_zalloc (abfd
, sizeof (struct elf_segment_map
)));
2406 m
->p_type
= PT_DYNAMIC
;
2408 m
->sections
[0] = dynsec
;
2414 /* For each loadable .note section, add a PT_NOTE segment. We don't
2415 use bfd_get_section_by_name, because if we link together
2416 nonloadable .note sections and loadable .note sections, we will
2417 generate two .note sections in the output file. FIXME: Using
2418 names for section types is bogus anyhow. */
2419 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
2421 if ((s
->flags
& SEC_LOAD
) != 0
2422 && strncmp (s
->name
, ".note", 5) == 0)
2424 m
= ((struct elf_segment_map
*)
2425 bfd_zalloc (abfd
, sizeof (struct elf_segment_map
)));
2429 m
->p_type
= PT_NOTE
;
2441 elf_tdata (abfd
)->segment_map
= mfirst
;
2445 if (sections
!= NULL
)
2450 /* Sort sections by address. */
2453 elf_sort_sections (arg1
, arg2
)
2457 const asection
*sec1
= *(const asection
**) arg1
;
2458 const asection
*sec2
= *(const asection
**) arg2
;
2460 /* Sort by LMA first, since this is the address used to
2461 place the section into a segment. */
2462 if (sec1
->lma
< sec2
->lma
)
2464 else if (sec1
->lma
> sec2
->lma
)
2467 /* Then sort by VMA. Normally the LMA and the VMA will be
2468 the same, and this will do nothing. */
2469 if (sec1
->vma
< sec2
->vma
)
2471 else if (sec1
->vma
> sec2
->vma
)
2474 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
2476 #define TOEND(x) (((x)->flags & SEC_LOAD) == 0)
2481 return sec1
->target_index
- sec2
->target_index
;
2491 /* Sort by size, to put zero sized sections before others at the
2494 if (sec1
->_raw_size
< sec2
->_raw_size
)
2496 if (sec1
->_raw_size
> sec2
->_raw_size
)
2499 return sec1
->target_index
- sec2
->target_index
;
2502 /* Assign file positions to the sections based on the mapping from
2503 sections to segments. This function also sets up some fields in
2504 the file header, and writes out the program headers. */
2507 assign_file_positions_for_segments (abfd
)
2510 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2512 struct elf_segment_map
*m
;
2514 Elf_Internal_Phdr
*phdrs
;
2516 bfd_vma filehdr_vaddr
, filehdr_paddr
;
2517 bfd_vma phdrs_vaddr
, phdrs_paddr
;
2518 Elf_Internal_Phdr
*p
;
2520 if (elf_tdata (abfd
)->segment_map
== NULL
)
2522 if (! map_sections_to_segments (abfd
))
2526 if (bed
->elf_backend_modify_segment_map
)
2528 if (! (*bed
->elf_backend_modify_segment_map
) (abfd
))
2533 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
2536 elf_elfheader (abfd
)->e_phoff
= bed
->s
->sizeof_ehdr
;
2537 elf_elfheader (abfd
)->e_phentsize
= bed
->s
->sizeof_phdr
;
2538 elf_elfheader (abfd
)->e_phnum
= count
;
2543 /* If we already counted the number of program segments, make sure
2544 that we allocated enough space. This happens when SIZEOF_HEADERS
2545 is used in a linker script. */
2546 alloc
= elf_tdata (abfd
)->program_header_size
/ bed
->s
->sizeof_phdr
;
2547 if (alloc
!= 0 && count
> alloc
)
2549 ((*_bfd_error_handler
)
2550 (_("%s: Not enough room for program headers (allocated %u, need %u)"),
2551 bfd_get_filename (abfd
), alloc
, count
));
2552 bfd_set_error (bfd_error_bad_value
);
2559 phdrs
= ((Elf_Internal_Phdr
*)
2560 bfd_alloc (abfd
, alloc
* sizeof (Elf_Internal_Phdr
)));
2564 off
= bed
->s
->sizeof_ehdr
;
2565 off
+= alloc
* bed
->s
->sizeof_phdr
;
2572 for (m
= elf_tdata (abfd
)->segment_map
, p
= phdrs
;
2579 /* If elf_segment_map is not from map_sections_to_segments, the
2580 sections may not be correctly ordered. */
2582 qsort (m
->sections
, (size_t) m
->count
, sizeof (asection
*),
2585 p
->p_type
= m
->p_type
;
2586 p
->p_flags
= m
->p_flags
;
2588 if (p
->p_type
== PT_LOAD
2590 && (m
->sections
[0]->flags
& SEC_ALLOC
) != 0)
2592 if ((abfd
->flags
& D_PAGED
) != 0)
2593 off
+= (m
->sections
[0]->vma
- off
) % bed
->maxpagesize
;
2596 bfd_size_type align
;
2599 for (i
= 0, secpp
= m
->sections
; i
< m
->count
; i
++, secpp
++)
2601 bfd_size_type secalign
;
2603 secalign
= bfd_get_section_alignment (abfd
, *secpp
);
2604 if (secalign
> align
)
2608 off
+= (m
->sections
[0]->vma
- off
) % (1 << align
);
2615 p
->p_vaddr
= m
->sections
[0]->vma
;
2617 if (m
->p_paddr_valid
)
2618 p
->p_paddr
= m
->p_paddr
;
2619 else if (m
->count
== 0)
2622 p
->p_paddr
= m
->sections
[0]->lma
;
2624 if (p
->p_type
== PT_LOAD
2625 && (abfd
->flags
& D_PAGED
) != 0)
2626 p
->p_align
= bed
->maxpagesize
;
2627 else if (m
->count
== 0)
2628 p
->p_align
= bed
->s
->file_align
;
2636 if (m
->includes_filehdr
)
2638 if (! m
->p_flags_valid
)
2641 p
->p_filesz
= bed
->s
->sizeof_ehdr
;
2642 p
->p_memsz
= bed
->s
->sizeof_ehdr
;
2645 BFD_ASSERT (p
->p_type
== PT_LOAD
);
2647 if (p
->p_vaddr
< (bfd_vma
) off
)
2649 _bfd_error_handler (_("%s: Not enough room for program headers, try linking with -N"),
2650 bfd_get_filename (abfd
));
2651 bfd_set_error (bfd_error_bad_value
);
2656 if (! m
->p_paddr_valid
)
2659 if (p
->p_type
== PT_LOAD
)
2661 filehdr_vaddr
= p
->p_vaddr
;
2662 filehdr_paddr
= p
->p_paddr
;
2666 if (m
->includes_phdrs
)
2668 if (! m
->p_flags_valid
)
2671 if (m
->includes_filehdr
)
2673 if (p
->p_type
== PT_LOAD
)
2675 phdrs_vaddr
= p
->p_vaddr
+ bed
->s
->sizeof_ehdr
;
2676 phdrs_paddr
= p
->p_paddr
+ bed
->s
->sizeof_ehdr
;
2681 p
->p_offset
= bed
->s
->sizeof_ehdr
;
2685 BFD_ASSERT (p
->p_type
== PT_LOAD
);
2686 p
->p_vaddr
-= off
- p
->p_offset
;
2687 if (! m
->p_paddr_valid
)
2688 p
->p_paddr
-= off
- p
->p_offset
;
2691 if (p
->p_type
== PT_LOAD
)
2693 phdrs_vaddr
= p
->p_vaddr
;
2694 phdrs_paddr
= p
->p_paddr
;
2697 phdrs_vaddr
= bed
->maxpagesize
+ bed
->s
->sizeof_ehdr
;
2700 p
->p_filesz
+= alloc
* bed
->s
->sizeof_phdr
;
2701 p
->p_memsz
+= alloc
* bed
->s
->sizeof_phdr
;
2704 if (p
->p_type
== PT_LOAD
2705 || (p
->p_type
== PT_NOTE
&& bfd_get_format (abfd
) == bfd_core
))
2707 if (! m
->includes_filehdr
&& ! m
->includes_phdrs
)
2713 adjust
= off
- (p
->p_offset
+ p
->p_filesz
);
2714 p
->p_filesz
+= adjust
;
2715 p
->p_memsz
+= adjust
;
2721 for (i
= 0, secpp
= m
->sections
; i
< m
->count
; i
++, secpp
++)
2725 bfd_size_type align
;
2729 align
= 1 << bfd_get_section_alignment (abfd
, sec
);
2731 /* The section may have artificial alignment forced by a
2732 link script. Notice this case by the gap between the
2733 cumulative phdr vma and the section's vma. */
2734 if (p
->p_vaddr
+ p
->p_memsz
< sec
->vma
)
2736 bfd_vma adjust
= sec
->vma
- (p
->p_vaddr
+ p
->p_memsz
);
2738 p
->p_memsz
+= adjust
;
2741 if ((flags
& SEC_LOAD
) != 0)
2742 p
->p_filesz
+= adjust
;
2745 if (p
->p_type
== PT_LOAD
)
2747 bfd_signed_vma adjust
;
2749 if ((flags
& SEC_LOAD
) != 0)
2751 adjust
= sec
->lma
- (p
->p_paddr
+ p
->p_memsz
);
2755 else if ((flags
& SEC_ALLOC
) != 0)
2757 /* The section VMA must equal the file position
2758 modulo the page size. FIXME: I'm not sure if
2759 this adjustment is really necessary. We used to
2760 not have the SEC_LOAD case just above, and then
2761 this was necessary, but now I'm not sure. */
2762 if ((abfd
->flags
& D_PAGED
) != 0)
2763 adjust
= (sec
->vma
- voff
) % bed
->maxpagesize
;
2765 adjust
= (sec
->vma
- voff
) % align
;
2774 (* _bfd_error_handler
)
2775 (_("Error: First section in segment (%s) starts at 0x%x"),
2776 bfd_section_name (abfd
, sec
), sec
->lma
);
2777 (* _bfd_error_handler
)
2778 (_(" whereas segment starts at 0x%x"),
2783 p
->p_memsz
+= adjust
;
2786 if ((flags
& SEC_LOAD
) != 0)
2787 p
->p_filesz
+= adjust
;
2792 /* We check SEC_HAS_CONTENTS here because if NOLOAD is
2793 used in a linker script we may have a section with
2794 SEC_LOAD clear but which is supposed to have
2796 if ((flags
& SEC_LOAD
) != 0
2797 || (flags
& SEC_HAS_CONTENTS
) != 0)
2798 off
+= sec
->_raw_size
;
2800 if ((flags
& SEC_ALLOC
) != 0)
2801 voff
+= sec
->_raw_size
;
2804 if (p
->p_type
== PT_NOTE
&& bfd_get_format (abfd
) == bfd_core
)
2806 if (i
== 0) /* the actual "note" segment */
2807 { /* this one actually contains everything. */
2809 p
->p_filesz
= sec
->_raw_size
;
2810 off
+= sec
->_raw_size
;
2813 else /* fake sections -- don't need to be written */
2817 flags
= sec
->flags
= 0; /* no contents */
2824 p
->p_memsz
+= sec
->_raw_size
;
2826 if ((flags
& SEC_LOAD
) != 0)
2827 p
->p_filesz
+= sec
->_raw_size
;
2829 if (align
> p
->p_align
2830 && (p
->p_type
!= PT_LOAD
|| (abfd
->flags
& D_PAGED
) == 0))
2834 if (! m
->p_flags_valid
)
2837 if ((flags
& SEC_CODE
) != 0)
2839 if ((flags
& SEC_READONLY
) == 0)
2845 /* Now that we have set the section file positions, we can set up
2846 the file positions for the non PT_LOAD segments. */
2847 for (m
= elf_tdata (abfd
)->segment_map
, p
= phdrs
;
2851 if (p
->p_type
!= PT_LOAD
&& m
->count
> 0)
2853 BFD_ASSERT (! m
->includes_filehdr
&& ! m
->includes_phdrs
);
2854 p
->p_offset
= m
->sections
[0]->filepos
;
2858 if (m
->includes_filehdr
)
2860 p
->p_vaddr
= filehdr_vaddr
;
2861 if (! m
->p_paddr_valid
)
2862 p
->p_paddr
= filehdr_paddr
;
2864 else if (m
->includes_phdrs
)
2866 p
->p_vaddr
= phdrs_vaddr
;
2867 if (! m
->p_paddr_valid
)
2868 p
->p_paddr
= phdrs_paddr
;
2873 /* Clear out any program headers we allocated but did not use. */
2874 for (; count
< alloc
; count
++, p
++)
2876 memset (p
, 0, sizeof *p
);
2877 p
->p_type
= PT_NULL
;
2880 elf_tdata (abfd
)->phdr
= phdrs
;
2882 elf_tdata (abfd
)->next_file_pos
= off
;
2884 /* Write out the program headers. */
2885 if (bfd_seek (abfd
, bed
->s
->sizeof_ehdr
, SEEK_SET
) != 0
2886 || bed
->s
->write_out_phdrs (abfd
, phdrs
, alloc
) != 0)
2892 /* Get the size of the program header.
2894 If this is called by the linker before any of the section VMA's are set, it
2895 can't calculate the correct value for a strange memory layout. This only
2896 happens when SIZEOF_HEADERS is used in a linker script. In this case,
2897 SORTED_HDRS is NULL and we assume the normal scenario of one text and one
2898 data segment (exclusive of .interp and .dynamic).
2900 ??? User written scripts must either not use SIZEOF_HEADERS, or assume there
2901 will be two segments. */
2903 static bfd_size_type
2904 get_program_header_size (abfd
)
2909 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2911 /* We can't return a different result each time we're called. */
2912 if (elf_tdata (abfd
)->program_header_size
!= 0)
2913 return elf_tdata (abfd
)->program_header_size
;
2915 if (elf_tdata (abfd
)->segment_map
!= NULL
)
2917 struct elf_segment_map
*m
;
2920 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
2922 elf_tdata (abfd
)->program_header_size
= segs
* bed
->s
->sizeof_phdr
;
2923 return elf_tdata (abfd
)->program_header_size
;
2926 /* Assume we will need exactly two PT_LOAD segments: one for text
2927 and one for data. */
2930 s
= bfd_get_section_by_name (abfd
, ".interp");
2931 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0)
2933 /* If we have a loadable interpreter section, we need a
2934 PT_INTERP segment. In this case, assume we also need a
2935 PT_PHDR segment, although that may not be true for all
2940 if (bfd_get_section_by_name (abfd
, ".dynamic") != NULL
)
2942 /* We need a PT_DYNAMIC segment. */
2946 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
2948 if ((s
->flags
& SEC_LOAD
) != 0
2949 && strncmp (s
->name
, ".note", 5) == 0)
2951 /* We need a PT_NOTE segment. */
2956 /* Let the backend count up any program headers it might need. */
2957 if (bed
->elf_backend_additional_program_headers
)
2961 a
= (*bed
->elf_backend_additional_program_headers
) (abfd
);
2967 elf_tdata (abfd
)->program_header_size
= segs
* bed
->s
->sizeof_phdr
;
2968 return elf_tdata (abfd
)->program_header_size
;
2971 /* Work out the file positions of all the sections. This is called by
2972 _bfd_elf_compute_section_file_positions. All the section sizes and
2973 VMAs must be known before this is called.
2975 We do not consider reloc sections at this point, unless they form
2976 part of the loadable image. Reloc sections are assigned file
2977 positions in assign_file_positions_for_relocs, which is called by
2978 write_object_contents and final_link.
2980 We also don't set the positions of the .symtab and .strtab here. */
2983 assign_file_positions_except_relocs (abfd
)
2986 struct elf_obj_tdata
* const tdata
= elf_tdata (abfd
);
2987 Elf_Internal_Ehdr
* const i_ehdrp
= elf_elfheader (abfd
);
2988 Elf_Internal_Shdr
** const i_shdrpp
= elf_elfsections (abfd
);
2990 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2992 if ((abfd
->flags
& (EXEC_P
| DYNAMIC
)) == 0
2993 && bfd_get_format (abfd
) != bfd_core
)
2995 Elf_Internal_Shdr
**hdrpp
;
2998 /* Start after the ELF header. */
2999 off
= i_ehdrp
->e_ehsize
;
3001 /* We are not creating an executable, which means that we are
3002 not creating a program header, and that the actual order of
3003 the sections in the file is unimportant. */
3004 for (i
= 1, hdrpp
= i_shdrpp
+ 1; i
< i_ehdrp
->e_shnum
; i
++, hdrpp
++)
3006 Elf_Internal_Shdr
*hdr
;
3009 if (hdr
->sh_type
== SHT_REL
|| hdr
->sh_type
== SHT_RELA
)
3011 hdr
->sh_offset
= -1;
3014 if (i
== tdata
->symtab_section
3015 || i
== tdata
->strtab_section
)
3017 hdr
->sh_offset
= -1;
3021 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, true);
3027 Elf_Internal_Shdr
**hdrpp
;
3029 /* Assign file positions for the loaded sections based on the
3030 assignment of sections to segments. */
3031 if (! assign_file_positions_for_segments (abfd
))
3034 /* Assign file positions for the other sections. */
3036 off
= elf_tdata (abfd
)->next_file_pos
;
3037 for (i
= 1, hdrpp
= i_shdrpp
+ 1; i
< i_ehdrp
->e_shnum
; i
++, hdrpp
++)
3039 Elf_Internal_Shdr
*hdr
;
3042 if (hdr
->bfd_section
!= NULL
3043 && hdr
->bfd_section
->filepos
!= 0)
3044 hdr
->sh_offset
= hdr
->bfd_section
->filepos
;
3045 else if ((hdr
->sh_flags
& SHF_ALLOC
) != 0)
3047 ((*_bfd_error_handler
)
3048 (_("%s: warning: allocated section `%s' not in segment"),
3049 bfd_get_filename (abfd
),
3050 (hdr
->bfd_section
== NULL
3052 : hdr
->bfd_section
->name
)));
3053 if ((abfd
->flags
& D_PAGED
) != 0)
3054 off
+= (hdr
->sh_addr
- off
) % bed
->maxpagesize
;
3056 off
+= (hdr
->sh_addr
- off
) % hdr
->sh_addralign
;
3057 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
,
3060 else if (hdr
->sh_type
== SHT_REL
3061 || hdr
->sh_type
== SHT_RELA
3062 || hdr
== i_shdrpp
[tdata
->symtab_section
]
3063 || hdr
== i_shdrpp
[tdata
->strtab_section
])
3064 hdr
->sh_offset
= -1;
3066 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, true);
3070 /* Place the section headers. */
3071 off
= align_file_position (off
, bed
->s
->file_align
);
3072 i_ehdrp
->e_shoff
= off
;
3073 off
+= i_ehdrp
->e_shnum
* i_ehdrp
->e_shentsize
;
3075 elf_tdata (abfd
)->next_file_pos
= off
;
3084 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
3085 Elf_Internal_Phdr
*i_phdrp
= 0; /* Program header table, internal form */
3086 Elf_Internal_Shdr
**i_shdrp
; /* Section header table, internal form */
3088 struct bfd_strtab_hash
*shstrtab
;
3089 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3091 i_ehdrp
= elf_elfheader (abfd
);
3092 i_shdrp
= elf_elfsections (abfd
);
3094 shstrtab
= _bfd_elf_stringtab_init ();
3095 if (shstrtab
== NULL
)
3098 elf_shstrtab (abfd
) = shstrtab
;
3100 i_ehdrp
->e_ident
[EI_MAG0
] = ELFMAG0
;
3101 i_ehdrp
->e_ident
[EI_MAG1
] = ELFMAG1
;
3102 i_ehdrp
->e_ident
[EI_MAG2
] = ELFMAG2
;
3103 i_ehdrp
->e_ident
[EI_MAG3
] = ELFMAG3
;
3105 i_ehdrp
->e_ident
[EI_CLASS
] = bed
->s
->elfclass
;
3106 i_ehdrp
->e_ident
[EI_DATA
] =
3107 bfd_big_endian (abfd
) ? ELFDATA2MSB
: ELFDATA2LSB
;
3108 i_ehdrp
->e_ident
[EI_VERSION
] = bed
->s
->ev_current
;
3110 i_ehdrp
->e_ident
[EI_OSABI
] = ELFOSABI_SYSV
;
3111 i_ehdrp
->e_ident
[EI_ABIVERSION
] = 0;
3113 for (count
= EI_PAD
; count
< EI_NIDENT
; count
++)
3114 i_ehdrp
->e_ident
[count
] = 0;
3116 if ((abfd
->flags
& DYNAMIC
) != 0)
3117 i_ehdrp
->e_type
= ET_DYN
;
3118 else if ((abfd
->flags
& EXEC_P
) != 0)
3119 i_ehdrp
->e_type
= ET_EXEC
;
3120 else if (bfd_get_format (abfd
) == bfd_core
)
3121 i_ehdrp
->e_type
= ET_CORE
;
3123 i_ehdrp
->e_type
= ET_REL
;
3125 switch (bfd_get_arch (abfd
))
3127 case bfd_arch_unknown
:
3128 i_ehdrp
->e_machine
= EM_NONE
;
3130 case bfd_arch_sparc
:
3131 if (bed
->s
->arch_size
== 64)
3132 i_ehdrp
->e_machine
= EM_SPARCV9
;
3134 i_ehdrp
->e_machine
= EM_SPARC
;
3137 i_ehdrp
->e_machine
= EM_386
;
3140 i_ehdrp
->e_machine
= EM_68K
;
3143 i_ehdrp
->e_machine
= EM_88K
;
3146 i_ehdrp
->e_machine
= EM_860
;
3149 i_ehdrp
->e_machine
= EM_960
;
3151 case bfd_arch_mips
: /* MIPS Rxxxx */
3152 i_ehdrp
->e_machine
= EM_MIPS
; /* only MIPS R3000 */
3155 i_ehdrp
->e_machine
= EM_PARISC
;
3157 case bfd_arch_powerpc
:
3158 i_ehdrp
->e_machine
= EM_PPC
;
3160 case bfd_arch_alpha
:
3161 i_ehdrp
->e_machine
= EM_ALPHA
;
3164 i_ehdrp
->e_machine
= EM_SH
;
3167 i_ehdrp
->e_machine
= EM_CYGNUS_D10V
;
3170 i_ehdrp
->e_machine
= EM_CYGNUS_D30V
;
3173 i_ehdrp
->e_machine
= EM_CYGNUS_FR30
;
3175 case bfd_arch_mcore
:
3176 i_ehdrp
->e_machine
= EM_MCORE
;
3179 switch (bfd_get_mach (abfd
))
3182 case 0: i_ehdrp
->e_machine
= EM_CYGNUS_V850
; break;
3186 i_ehdrp
->e_machine
= EM_CYGNUS_ARC
;
3189 i_ehdrp
->e_machine
= EM_ARM
;
3192 i_ehdrp
->e_machine
= EM_CYGNUS_M32R
;
3194 case bfd_arch_mn10200
:
3195 i_ehdrp
->e_machine
= EM_CYGNUS_MN10200
;
3197 case bfd_arch_mn10300
:
3198 i_ehdrp
->e_machine
= EM_CYGNUS_MN10300
;
3201 i_ehdrp
->e_machine
= EM_PJ
;
3203 /* also note that EM_M32, AT&T WE32100 is unknown to bfd */
3205 i_ehdrp
->e_machine
= EM_NONE
;
3207 i_ehdrp
->e_version
= bed
->s
->ev_current
;
3208 i_ehdrp
->e_ehsize
= bed
->s
->sizeof_ehdr
;
3210 /* no program header, for now. */
3211 i_ehdrp
->e_phoff
= 0;
3212 i_ehdrp
->e_phentsize
= 0;
3213 i_ehdrp
->e_phnum
= 0;
3215 /* each bfd section is section header entry */
3216 i_ehdrp
->e_entry
= bfd_get_start_address (abfd
);
3217 i_ehdrp
->e_shentsize
= bed
->s
->sizeof_shdr
;
3219 /* if we're building an executable, we'll need a program header table */
3220 if (abfd
->flags
& EXEC_P
)
3222 /* it all happens later */
3224 i_ehdrp
->e_phentsize
= sizeof (Elf_External_Phdr
);
3226 /* elf_build_phdrs() returns a (NULL-terminated) array of
3227 Elf_Internal_Phdrs */
3228 i_phdrp
= elf_build_phdrs (abfd
, i_ehdrp
, i_shdrp
, &i_ehdrp
->e_phnum
);
3229 i_ehdrp
->e_phoff
= outbase
;
3230 outbase
+= i_ehdrp
->e_phentsize
* i_ehdrp
->e_phnum
;
3235 i_ehdrp
->e_phentsize
= 0;
3237 i_ehdrp
->e_phoff
= 0;
3240 elf_tdata (abfd
)->symtab_hdr
.sh_name
=
3241 (unsigned int) _bfd_stringtab_add (shstrtab
, ".symtab", true, false);
3242 elf_tdata (abfd
)->strtab_hdr
.sh_name
=
3243 (unsigned int) _bfd_stringtab_add (shstrtab
, ".strtab", true, false);
3244 elf_tdata (abfd
)->shstrtab_hdr
.sh_name
=
3245 (unsigned int) _bfd_stringtab_add (shstrtab
, ".shstrtab", true, false);
3246 if (elf_tdata (abfd
)->symtab_hdr
.sh_name
== (unsigned int) -1
3247 || elf_tdata (abfd
)->symtab_hdr
.sh_name
== (unsigned int) -1
3248 || elf_tdata (abfd
)->shstrtab_hdr
.sh_name
== (unsigned int) -1)
3254 /* Assign file positions for all the reloc sections which are not part
3255 of the loadable file image. */
3258 _bfd_elf_assign_file_positions_for_relocs (abfd
)
3263 Elf_Internal_Shdr
**shdrpp
;
3265 off
= elf_tdata (abfd
)->next_file_pos
;
3267 for (i
= 1, shdrpp
= elf_elfsections (abfd
) + 1;
3268 i
< elf_elfheader (abfd
)->e_shnum
;
3271 Elf_Internal_Shdr
*shdrp
;
3274 if ((shdrp
->sh_type
== SHT_REL
|| shdrp
->sh_type
== SHT_RELA
)
3275 && shdrp
->sh_offset
== -1)
3276 off
= _bfd_elf_assign_file_position_for_section (shdrp
, off
, true);
3279 elf_tdata (abfd
)->next_file_pos
= off
;
3283 _bfd_elf_write_object_contents (abfd
)
3286 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3287 Elf_Internal_Ehdr
*i_ehdrp
;
3288 Elf_Internal_Shdr
**i_shdrp
;
3292 if (! abfd
->output_has_begun
3293 && ! _bfd_elf_compute_section_file_positions
3294 (abfd
, (struct bfd_link_info
*) NULL
))
3297 i_shdrp
= elf_elfsections (abfd
);
3298 i_ehdrp
= elf_elfheader (abfd
);
3301 bfd_map_over_sections (abfd
, bed
->s
->write_relocs
, &failed
);
3305 _bfd_elf_assign_file_positions_for_relocs (abfd
);
3307 /* After writing the headers, we need to write the sections too... */
3308 for (count
= 1; count
< i_ehdrp
->e_shnum
; count
++)
3310 if (bed
->elf_backend_section_processing
)
3311 (*bed
->elf_backend_section_processing
) (abfd
, i_shdrp
[count
]);
3312 if (i_shdrp
[count
]->contents
)
3314 if (bfd_seek (abfd
, i_shdrp
[count
]->sh_offset
, SEEK_SET
) != 0
3315 || (bfd_write (i_shdrp
[count
]->contents
, i_shdrp
[count
]->sh_size
,
3317 != i_shdrp
[count
]->sh_size
))
3322 /* Write out the section header names. */
3323 if (bfd_seek (abfd
, elf_tdata (abfd
)->shstrtab_hdr
.sh_offset
, SEEK_SET
) != 0
3324 || ! _bfd_stringtab_emit (abfd
, elf_shstrtab (abfd
)))
3327 if (bed
->elf_backend_final_write_processing
)
3328 (*bed
->elf_backend_final_write_processing
) (abfd
,
3329 elf_tdata (abfd
)->linker
);
3331 return bed
->s
->write_shdrs_and_ehdr (abfd
);
3335 _bfd_elf_write_corefile_contents (abfd
)
3338 /* Hopefully this can be done just like an object file. */
3339 return _bfd_elf_write_object_contents (abfd
);
3341 /* given a section, search the header to find them... */
3343 _bfd_elf_section_from_bfd_section (abfd
, asect
)
3347 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3348 Elf_Internal_Shdr
**i_shdrp
= elf_elfsections (abfd
);
3350 Elf_Internal_Shdr
*hdr
;
3351 int maxindex
= elf_elfheader (abfd
)->e_shnum
;
3353 for (index
= 0; index
< maxindex
; index
++)
3355 hdr
= i_shdrp
[index
];
3356 if (hdr
->bfd_section
== asect
)
3360 if (bed
->elf_backend_section_from_bfd_section
)
3362 for (index
= 0; index
< maxindex
; index
++)
3366 hdr
= i_shdrp
[index
];
3368 if ((*bed
->elf_backend_section_from_bfd_section
)
3369 (abfd
, hdr
, asect
, &retval
))
3374 if (bfd_is_abs_section (asect
))
3376 if (bfd_is_com_section (asect
))
3378 if (bfd_is_und_section (asect
))
3381 bfd_set_error (bfd_error_nonrepresentable_section
);
3386 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
3390 _bfd_elf_symbol_from_bfd_symbol (abfd
, asym_ptr_ptr
)
3392 asymbol
**asym_ptr_ptr
;
3394 asymbol
*asym_ptr
= *asym_ptr_ptr
;
3396 flagword flags
= asym_ptr
->flags
;
3398 /* When gas creates relocations against local labels, it creates its
3399 own symbol for the section, but does put the symbol into the
3400 symbol chain, so udata is 0. When the linker is generating
3401 relocatable output, this section symbol may be for one of the
3402 input sections rather than the output section. */
3403 if (asym_ptr
->udata
.i
== 0
3404 && (flags
& BSF_SECTION_SYM
)
3405 && asym_ptr
->section
)
3409 if (asym_ptr
->section
->output_section
!= NULL
)
3410 indx
= asym_ptr
->section
->output_section
->index
;
3412 indx
= asym_ptr
->section
->index
;
3413 if (elf_section_syms (abfd
)[indx
])
3414 asym_ptr
->udata
.i
= elf_section_syms (abfd
)[indx
]->udata
.i
;
3417 idx
= asym_ptr
->udata
.i
;
3421 /* This case can occur when using --strip-symbol on a symbol
3422 which is used in a relocation entry. */
3423 (*_bfd_error_handler
)
3424 (_("%s: symbol `%s' required but not present"),
3425 bfd_get_filename (abfd
), bfd_asymbol_name (asym_ptr
));
3426 bfd_set_error (bfd_error_no_symbols
);
3433 _("elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n"),
3434 (long) asym_ptr
, asym_ptr
->name
, idx
, flags
,
3435 elf_symbol_flags (flags
));
3443 /* Copy private BFD data. This copies any program header information. */
3446 copy_private_bfd_data (ibfd
, obfd
)
3450 Elf_Internal_Ehdr
*iehdr
;
3451 struct elf_segment_map
*mfirst
;
3452 struct elf_segment_map
**pm
;
3453 struct elf_segment_map
*m
;
3454 Elf_Internal_Phdr
*p
;
3456 unsigned int num_segments
;
3457 boolean phdr_included
= false;
3459 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
3460 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
3463 if (elf_tdata (ibfd
)->phdr
== NULL
)
3466 iehdr
= elf_elfheader (ibfd
);
3471 num_segments
= elf_elfheader (ibfd
)->e_phnum
;
3473 #define IS_CONTAINED_BY(addr, len, bottom, phdr) \
3474 ((addr) >= (bottom) \
3475 && ( ((addr) + (len)) <= ((bottom) + (phdr)->p_memsz) \
3476 || ((addr) + (len)) <= ((bottom) + (phdr)->p_filesz)))
3478 /* Special case: corefile "NOTE" section containing regs, prpsinfo etc. */
3480 #define IS_COREFILE_NOTE(p, s) \
3481 (p->p_type == PT_NOTE \
3482 && bfd_get_format (ibfd) == bfd_core \
3483 && s->vma == 0 && s->lma == 0 \
3484 && (bfd_vma) s->filepos >= p->p_offset \
3485 && (bfd_vma) s->filepos + s->_raw_size \
3486 <= p->p_offset + p->p_filesz)
3488 /* The complicated case when p_vaddr is 0 is to handle the Solaris
3489 linker, which generates a PT_INTERP section with p_vaddr and
3490 p_memsz set to 0. */
3492 #define IS_SOLARIS_PT_INTERP(p, s) \
3494 && p->p_filesz > 0 \
3495 && (s->flags & SEC_HAS_CONTENTS) != 0 \
3496 && s->_raw_size > 0 \
3497 && (bfd_vma) s->filepos >= p->p_offset \
3498 && ((bfd_vma) s->filepos + s->_raw_size \
3499 <= p->p_offset + p->p_filesz))
3501 /* Scan through the segments specified in the program header
3502 of the input BFD. */
3503 for (i
= 0, p
= elf_tdata (ibfd
)->phdr
; i
< num_segments
; i
++, p
++)
3507 asection
**sections
;
3510 bfd_vma matching_lma
;
3511 bfd_vma suggested_lma
;
3514 /* For each section in the input BFD, decide if it should be
3515 included in the current segment. A section will be included
3516 if it is within the address space of the segment, and it is
3517 an allocated segment, and there is an output section
3518 associated with it. */
3520 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
3521 if (s
->output_section
!= NULL
)
3523 if ((IS_CONTAINED_BY (s
->vma
, s
->_raw_size
, p
->p_vaddr
, p
)
3524 || IS_SOLARIS_PT_INTERP (p
, s
))
3525 && (s
->flags
& SEC_ALLOC
) != 0)
3527 else if (IS_COREFILE_NOTE (p
, s
))
3531 /* Allocate a segment map big enough to contain all of the
3532 sections we have selected. */
3533 m
= ((struct elf_segment_map
*)
3535 (sizeof (struct elf_segment_map
)
3536 + ((size_t) csecs
- 1) * sizeof (asection
*))));
3540 /* Initialise the fields of the segment map. Default to
3541 using the physical address of the segment in the input BFD. */
3543 m
->p_type
= p
->p_type
;
3544 m
->p_flags
= p
->p_flags
;
3545 m
->p_flags_valid
= 1;
3546 m
->p_paddr
= p
->p_paddr
;
3547 m
->p_paddr_valid
= 1;
3549 /* Determine if this segment contains the ELF file header
3550 and if it contains the program headers themselves. */
3551 m
->includes_filehdr
= (p
->p_offset
== 0
3552 && p
->p_filesz
>= iehdr
->e_ehsize
);
3554 m
->includes_phdrs
= 0;
3556 if (! phdr_included
|| p
->p_type
!= PT_LOAD
)
3559 (p
->p_offset
<= (bfd_vma
) iehdr
->e_phoff
3560 && (p
->p_offset
+ p
->p_filesz
3561 >= ((bfd_vma
) iehdr
->e_phoff
3562 + iehdr
->e_phnum
* iehdr
->e_phentsize
)));
3563 if (p
->p_type
== PT_LOAD
&& m
->includes_phdrs
)
3564 phdr_included
= true;
3569 /* Special segments, such as the PT_PHDR segment, may contain
3570 no sections, but ordinary, loadable segments should contain
3573 if (p
->p_type
== PT_LOAD
)
3575 (_("%s: warning: Empty loadable segment detected\n"),
3576 bfd_get_filename (ibfd
));
3585 /* Now scan the sections in the input BFD again and attempt
3586 to add their corresponding output sections to the segment map.
3587 The problem here is how to handle an output section which has
3588 been moved (ie had its LMA changed). There are four possibilities:
3590 1. None of the sections have been moved.
3591 In this case we can continue to use the segment LMA from the
3594 2. All of the sections have been moved by the same amount.
3595 In this case we can change the segment's LMA to match the LMA
3596 of the first section.
3598 3. Some of the sections have been moved, others have not.
3599 In this case those sections which have not been moved can be
3600 placed in the current segment which will have to have its size,
3601 and possibly its LMA changed, and a new segment or segments will
3602 have to be created to contain the other sections.
3604 4. The sections have been moved, but not be the same amount.
3605 In this case we can change the segment's LMA to match the LMA
3606 of the first section and we will have to create a new segment
3607 or segments to contain the other sections.
3609 In order to save time, we allocate an array to hold the section
3610 pointers that we are interested in. As these sections get assigned
3611 to a segment, they are removed from this array. */
3613 sections
= (asection
**) bfd_malloc (sizeof (asection
*) * csecs
);
3614 if (sections
== NULL
)
3617 /* Step One: Scan for segment vs section LMA conflicts.
3618 Also add the sections to the section array allocated above.
3619 Also add the sections to the current segment. In the common
3620 case, where the sections have not been moved, this means that
3621 we have completely filled the segment, and there is nothing
3625 matching_lma
= false;
3628 for (j
= 0, s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
3630 os
= s
->output_section
;
3632 if ((((IS_CONTAINED_BY (s
->vma
, s
->_raw_size
, p
->p_vaddr
, p
)
3633 || IS_SOLARIS_PT_INTERP (p
, s
))
3634 && (s
->flags
& SEC_ALLOC
) != 0)
3635 || IS_COREFILE_NOTE (p
, s
))
3640 /* The Solaris native linker always sets p_paddr to 0.
3641 We try to catch that case here, and set it to the
3647 && (os
->vma
== (p
->p_vaddr
3648 + (m
->includes_filehdr
3651 + (m
->includes_phdrs
3652 ? iehdr
->e_phnum
* iehdr
->e_phentsize
3654 m
->p_paddr
= p
->p_vaddr
;
3656 /* Match up the physical address of the segment with the
3657 LMA address of the output section. */
3658 if (IS_CONTAINED_BY (os
->lma
, os
->_raw_size
, m
->p_paddr
, p
)
3659 || IS_COREFILE_NOTE (p
, s
))
3661 if (matching_lma
== 0)
3662 matching_lma
= os
->lma
;
3664 /* We assume that if the section fits within the segment
3665 that it does not overlap any other section within that
3667 m
->sections
[isec
++] = os
;
3669 else if (suggested_lma
== 0)
3670 suggested_lma
= os
->lma
;
3674 BFD_ASSERT (j
== csecs
);
3676 /* Step Two: Adjust the physical address of the current segment,
3680 /* All of the sections fitted within the segment as currently
3681 specified. This is the default case. Add the segment to
3682 the list of built segments and carry on to process the next
3683 program header in the input BFD. */
3691 else if (matching_lma
!= 0)
3693 /* At least one section fits inside the current segment.
3694 Keep it, but modify its physical address to match the
3695 LMA of the first section that fitted. */
3697 m
->p_paddr
= matching_lma
;
3701 /* None of the sections fitted inside the current segment.
3702 Change the current segment's physical address to match
3703 the LMA of the first section. */
3705 m
->p_paddr
= suggested_lma
;
3708 /* Step Three: Loop over the sections again, this time assigning
3709 those that fit to the current segment and remvoing them from the
3710 sections array; but making sure not to leave large gaps. Once all
3711 possible sections have been assigned to the current segment it is
3712 added to the list of built segments and if sections still remain
3713 to be assigned, a new segment is constructed before repeating
3721 /* Fill the current segment with sections that fit. */
3722 for (j
= 0; j
< csecs
; j
++)
3729 os
= s
->output_section
;
3731 if (IS_CONTAINED_BY (os
->lma
, os
->_raw_size
, m
->p_paddr
, p
)
3732 || IS_COREFILE_NOTE (p
, s
))
3736 /* If the first section in a segment does not start at
3737 the beginning of the segment, then something is wrong. */
3738 if (os
->lma
!= m
->p_paddr
)
3743 asection
* prev_sec
;
3744 bfd_vma maxpagesize
;
3746 prev_sec
= m
->sections
[m
->count
- 1];
3747 maxpagesize
= get_elf_backend_data (obfd
)->maxpagesize
;
3749 /* If the gap between the end of the previous section
3750 and the start of this section is more than maxpagesize
3751 then we need to start a new segment. */
3752 if (BFD_ALIGN (prev_sec
->lma
+ prev_sec
->_raw_size
, maxpagesize
)
3753 < BFD_ALIGN (os
->lma
, maxpagesize
))
3755 if (suggested_lma
== 0)
3756 suggested_lma
= os
->lma
;
3762 m
->sections
[m
->count
++] = os
;
3766 else if (suggested_lma
== 0)
3767 suggested_lma
= os
->lma
;
3770 BFD_ASSERT (m
->count
> 0);
3772 /* Add the current segment to the list of built segments. */
3778 /* We still have not allocated all of the sections to
3779 segments. Create a new segment here, initialise it
3780 and carry on looping. */
3782 m
= ((struct elf_segment_map
*)
3784 (sizeof (struct elf_segment_map
)
3785 + ((size_t) csecs
- 1) * sizeof (asection
*))));
3789 /* Initialise the fields of the segment map. Set the physical
3790 physical address to the LMA of the first section that has
3791 not yet been assigned. */
3794 m
->p_type
= p
->p_type
;
3795 m
->p_flags
= p
->p_flags
;
3796 m
->p_flags_valid
= 1;
3797 m
->p_paddr
= suggested_lma
;
3798 m
->p_paddr_valid
= 1;
3799 m
->includes_filehdr
= 0;
3800 m
->includes_phdrs
= 0;
3803 while (isec
< csecs
);
3808 /* The Solaris linker creates program headers in which all the
3809 p_paddr fields are zero. When we try to objcopy or strip such a
3810 file, we get confused. Check for this case, and if we find it
3811 reset the p_paddr_valid fields. */
3812 for (m
= mfirst
; m
!= NULL
; m
= m
->next
)
3813 if (m
->p_paddr
!= 0)
3817 for (m
= mfirst
; m
!= NULL
; m
= m
->next
)
3818 m
->p_paddr_valid
= 0;
3821 elf_tdata (obfd
)->segment_map
= mfirst
;
3824 /* Final Step: Sort the segments into ascending order of physical address. */
3827 struct elf_segment_map
* prev
;
3830 for (m
= mfirst
->next
; m
!= NULL
; prev
= m
, m
= m
->next
)
3832 /* Yes I know - its a bubble sort....*/
3833 if (m
->next
!= NULL
&& (m
->next
->p_paddr
< m
->p_paddr
))
3835 /* swap m and m->next */
3836 prev
->next
= m
->next
;
3837 m
->next
= m
->next
->next
;
3838 prev
->next
->next
= m
;
3847 #undef IS_CONTAINED_BY
3848 #undef IS_SOLARIS_PT_INTERP
3849 #undef IS_COREFILE_NOTE
3853 /* Copy private section information. This copies over the entsize
3854 field, and sometimes the info field. */
3857 _bfd_elf_copy_private_section_data (ibfd
, isec
, obfd
, osec
)
3863 Elf_Internal_Shdr
*ihdr
, *ohdr
;
3865 if (ibfd
->xvec
->flavour
!= bfd_target_elf_flavour
3866 || obfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
3869 /* Copy over private BFD data if it has not already been copied.
3870 This must be done here, rather than in the copy_private_bfd_data
3871 entry point, because the latter is called after the section
3872 contents have been set, which means that the program headers have
3873 already been worked out. */
3874 if (elf_tdata (obfd
)->segment_map
== NULL
3875 && elf_tdata (ibfd
)->phdr
!= NULL
)
3879 /* Only set up the segments if there are no more SEC_ALLOC
3880 sections. FIXME: This won't do the right thing if objcopy is
3881 used to remove the last SEC_ALLOC section, since objcopy
3882 won't call this routine in that case. */
3883 for (s
= isec
->next
; s
!= NULL
; s
= s
->next
)
3884 if ((s
->flags
& SEC_ALLOC
) != 0)
3888 if (! copy_private_bfd_data (ibfd
, obfd
))
3893 ihdr
= &elf_section_data (isec
)->this_hdr
;
3894 ohdr
= &elf_section_data (osec
)->this_hdr
;
3896 ohdr
->sh_entsize
= ihdr
->sh_entsize
;
3898 if (ihdr
->sh_type
== SHT_SYMTAB
3899 || ihdr
->sh_type
== SHT_DYNSYM
3900 || ihdr
->sh_type
== SHT_GNU_verneed
3901 || ihdr
->sh_type
== SHT_GNU_verdef
)
3902 ohdr
->sh_info
= ihdr
->sh_info
;
3904 elf_section_data (osec
)->use_rela_p
3905 = elf_section_data (isec
)->use_rela_p
;
3910 /* Copy private symbol information. If this symbol is in a section
3911 which we did not map into a BFD section, try to map the section
3912 index correctly. We use special macro definitions for the mapped
3913 section indices; these definitions are interpreted by the
3914 swap_out_syms function. */
3916 #define MAP_ONESYMTAB (SHN_LORESERVE - 1)
3917 #define MAP_DYNSYMTAB (SHN_LORESERVE - 2)
3918 #define MAP_STRTAB (SHN_LORESERVE - 3)
3919 #define MAP_SHSTRTAB (SHN_LORESERVE - 4)
3922 _bfd_elf_copy_private_symbol_data (ibfd
, isymarg
, obfd
, osymarg
)
3928 elf_symbol_type
*isym
, *osym
;
3930 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
3931 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
3934 isym
= elf_symbol_from (ibfd
, isymarg
);
3935 osym
= elf_symbol_from (obfd
, osymarg
);
3939 && bfd_is_abs_section (isym
->symbol
.section
))
3943 shndx
= isym
->internal_elf_sym
.st_shndx
;
3944 if (shndx
== elf_onesymtab (ibfd
))
3945 shndx
= MAP_ONESYMTAB
;
3946 else if (shndx
== elf_dynsymtab (ibfd
))
3947 shndx
= MAP_DYNSYMTAB
;
3948 else if (shndx
== elf_tdata (ibfd
)->strtab_section
)
3950 else if (shndx
== elf_tdata (ibfd
)->shstrtab_section
)
3951 shndx
= MAP_SHSTRTAB
;
3952 osym
->internal_elf_sym
.st_shndx
= shndx
;
3958 /* Swap out the symbols. */
3961 swap_out_syms (abfd
, sttp
, relocatable_p
)
3963 struct bfd_strtab_hash
**sttp
;
3966 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3968 if (!elf_map_symbols (abfd
))
3971 /* Dump out the symtabs. */
3973 int symcount
= bfd_get_symcount (abfd
);
3974 asymbol
**syms
= bfd_get_outsymbols (abfd
);
3975 struct bfd_strtab_hash
*stt
;
3976 Elf_Internal_Shdr
*symtab_hdr
;
3977 Elf_Internal_Shdr
*symstrtab_hdr
;
3978 char *outbound_syms
;
3981 stt
= _bfd_elf_stringtab_init ();
3985 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
3986 symtab_hdr
->sh_type
= SHT_SYMTAB
;
3987 symtab_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
3988 symtab_hdr
->sh_size
= symtab_hdr
->sh_entsize
* (symcount
+ 1);
3989 symtab_hdr
->sh_info
= elf_num_locals (abfd
) + 1;
3990 symtab_hdr
->sh_addralign
= bed
->s
->file_align
;
3992 symstrtab_hdr
= &elf_tdata (abfd
)->strtab_hdr
;
3993 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
3995 outbound_syms
= bfd_alloc (abfd
,
3996 (1 + symcount
) * bed
->s
->sizeof_sym
);
3997 if (outbound_syms
== NULL
)
3999 symtab_hdr
->contents
= (PTR
) outbound_syms
;
4001 /* now generate the data (for "contents") */
4003 /* Fill in zeroth symbol and swap it out. */
4004 Elf_Internal_Sym sym
;
4010 sym
.st_shndx
= SHN_UNDEF
;
4011 bed
->s
->swap_symbol_out (abfd
, &sym
, (PTR
) outbound_syms
);
4012 outbound_syms
+= bed
->s
->sizeof_sym
;
4014 for (idx
= 0; idx
< symcount
; idx
++)
4016 Elf_Internal_Sym sym
;
4017 bfd_vma value
= syms
[idx
]->value
;
4018 elf_symbol_type
*type_ptr
;
4019 flagword flags
= syms
[idx
]->flags
;
4022 if (flags
& BSF_SECTION_SYM
)
4023 /* Section symbols have no names. */
4027 sym
.st_name
= (unsigned long) _bfd_stringtab_add (stt
,
4030 if (sym
.st_name
== (unsigned long) -1)
4034 type_ptr
= elf_symbol_from (abfd
, syms
[idx
]);
4036 if ((flags
& BSF_SECTION_SYM
) == 0
4037 && bfd_is_com_section (syms
[idx
]->section
))
4039 /* ELF common symbols put the alignment into the `value' field,
4040 and the size into the `size' field. This is backwards from
4041 how BFD handles it, so reverse it here. */
4042 sym
.st_size
= value
;
4043 if (type_ptr
== NULL
4044 || type_ptr
->internal_elf_sym
.st_value
== 0)
4045 sym
.st_value
= value
>= 16 ? 16 : (1 << bfd_log2 (value
));
4047 sym
.st_value
= type_ptr
->internal_elf_sym
.st_value
;
4048 sym
.st_shndx
= _bfd_elf_section_from_bfd_section
4049 (abfd
, syms
[idx
]->section
);
4053 asection
*sec
= syms
[idx
]->section
;
4056 if (sec
->output_section
)
4058 value
+= sec
->output_offset
;
4059 sec
= sec
->output_section
;
4061 /* Don't add in the section vma for relocatable output. */
4062 if (! relocatable_p
)
4064 sym
.st_value
= value
;
4065 sym
.st_size
= type_ptr
? type_ptr
->internal_elf_sym
.st_size
: 0;
4067 if (bfd_is_abs_section (sec
)
4069 && type_ptr
->internal_elf_sym
.st_shndx
!= 0)
4071 /* This symbol is in a real ELF section which we did
4072 not create as a BFD section. Undo the mapping done
4073 by copy_private_symbol_data. */
4074 shndx
= type_ptr
->internal_elf_sym
.st_shndx
;
4078 shndx
= elf_onesymtab (abfd
);
4081 shndx
= elf_dynsymtab (abfd
);
4084 shndx
= elf_tdata (abfd
)->strtab_section
;
4087 shndx
= elf_tdata (abfd
)->shstrtab_section
;
4095 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec
);
4101 /* Writing this would be a hell of a lot easier if
4102 we had some decent documentation on bfd, and
4103 knew what to expect of the library, and what to
4104 demand of applications. For example, it
4105 appears that `objcopy' might not set the
4106 section of a symbol to be a section that is
4107 actually in the output file. */
4108 sec2
= bfd_get_section_by_name (abfd
, sec
->name
);
4109 BFD_ASSERT (sec2
!= 0);
4110 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec2
);
4111 BFD_ASSERT (shndx
!= -1);
4115 sym
.st_shndx
= shndx
;
4118 if ((flags
& BSF_FUNCTION
) != 0)
4120 else if ((flags
& BSF_OBJECT
) != 0)
4125 /* Processor-specific types */
4126 if (bed
->elf_backend_get_symbol_type
)
4127 type
= (*bed
->elf_backend_get_symbol_type
) (&type_ptr
->internal_elf_sym
, type
);
4129 if (flags
& BSF_SECTION_SYM
)
4130 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_SECTION
);
4131 else if (bfd_is_com_section (syms
[idx
]->section
))
4132 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, type
);
4133 else if (bfd_is_und_section (syms
[idx
]->section
))
4134 sym
.st_info
= ELF_ST_INFO (((flags
& BSF_WEAK
)
4138 else if (flags
& BSF_FILE
)
4139 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FILE
);
4142 int bind
= STB_LOCAL
;
4144 if (flags
& BSF_LOCAL
)
4146 else if (flags
& BSF_WEAK
)
4148 else if (flags
& BSF_GLOBAL
)
4151 sym
.st_info
= ELF_ST_INFO (bind
, type
);
4154 if (type_ptr
!= NULL
)
4155 sym
.st_other
= type_ptr
->internal_elf_sym
.st_other
;
4159 bed
->s
->swap_symbol_out (abfd
, &sym
, (PTR
) outbound_syms
);
4160 outbound_syms
+= bed
->s
->sizeof_sym
;
4164 symstrtab_hdr
->sh_size
= _bfd_stringtab_size (stt
);
4165 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
4167 symstrtab_hdr
->sh_flags
= 0;
4168 symstrtab_hdr
->sh_addr
= 0;
4169 symstrtab_hdr
->sh_entsize
= 0;
4170 symstrtab_hdr
->sh_link
= 0;
4171 symstrtab_hdr
->sh_info
= 0;
4172 symstrtab_hdr
->sh_addralign
= 1;
4178 /* Return the number of bytes required to hold the symtab vector.
4180 Note that we base it on the count plus 1, since we will null terminate
4181 the vector allocated based on this size. However, the ELF symbol table
4182 always has a dummy entry as symbol #0, so it ends up even. */
4185 _bfd_elf_get_symtab_upper_bound (abfd
)
4190 Elf_Internal_Shdr
*hdr
= &elf_tdata (abfd
)->symtab_hdr
;
4192 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
4193 symtab_size
= (symcount
- 1 + 1) * (sizeof (asymbol
*));
4199 _bfd_elf_get_dynamic_symtab_upper_bound (abfd
)
4204 Elf_Internal_Shdr
*hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
4206 if (elf_dynsymtab (abfd
) == 0)
4208 bfd_set_error (bfd_error_invalid_operation
);
4212 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
4213 symtab_size
= (symcount
- 1 + 1) * (sizeof (asymbol
*));
4219 _bfd_elf_get_reloc_upper_bound (abfd
, asect
)
4220 bfd
*abfd ATTRIBUTE_UNUSED
;
4223 return (asect
->reloc_count
+ 1) * sizeof (arelent
*);
4226 /* Canonicalize the relocs. */
4229 _bfd_elf_canonicalize_reloc (abfd
, section
, relptr
, symbols
)
4238 if (! get_elf_backend_data (abfd
)->s
->slurp_reloc_table (abfd
,
4244 tblptr
= section
->relocation
;
4245 for (i
= 0; i
< section
->reloc_count
; i
++)
4246 *relptr
++ = tblptr
++;
4250 return section
->reloc_count
;
4254 _bfd_elf_get_symtab (abfd
, alocation
)
4256 asymbol
**alocation
;
4258 long symcount
= get_elf_backend_data (abfd
)->s
->slurp_symbol_table
4259 (abfd
, alocation
, false);
4262 bfd_get_symcount (abfd
) = symcount
;
4267 _bfd_elf_canonicalize_dynamic_symtab (abfd
, alocation
)
4269 asymbol
**alocation
;
4271 return get_elf_backend_data (abfd
)->s
->slurp_symbol_table
4272 (abfd
, alocation
, true);
4275 /* Return the size required for the dynamic reloc entries. Any
4276 section that was actually installed in the BFD, and has type
4277 SHT_REL or SHT_RELA, and uses the dynamic symbol table, is
4278 considered to be a dynamic reloc section. */
4281 _bfd_elf_get_dynamic_reloc_upper_bound (abfd
)
4287 if (elf_dynsymtab (abfd
) == 0)
4289 bfd_set_error (bfd_error_invalid_operation
);
4293 ret
= sizeof (arelent
*);
4294 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
4295 if (elf_section_data (s
)->this_hdr
.sh_link
== elf_dynsymtab (abfd
)
4296 && (elf_section_data (s
)->this_hdr
.sh_type
== SHT_REL
4297 || elf_section_data (s
)->this_hdr
.sh_type
== SHT_RELA
))
4298 ret
+= ((s
->_raw_size
/ elf_section_data (s
)->this_hdr
.sh_entsize
)
4299 * sizeof (arelent
*));
4304 /* Canonicalize the dynamic relocation entries. Note that we return
4305 the dynamic relocations as a single block, although they are
4306 actually associated with particular sections; the interface, which
4307 was designed for SunOS style shared libraries, expects that there
4308 is only one set of dynamic relocs. Any section that was actually
4309 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses
4310 the dynamic symbol table, is considered to be a dynamic reloc
4314 _bfd_elf_canonicalize_dynamic_reloc (abfd
, storage
, syms
)
4319 boolean (*slurp_relocs
) PARAMS ((bfd
*, asection
*, asymbol
**, boolean
));
4323 if (elf_dynsymtab (abfd
) == 0)
4325 bfd_set_error (bfd_error_invalid_operation
);
4329 slurp_relocs
= get_elf_backend_data (abfd
)->s
->slurp_reloc_table
;
4331 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
4333 if (elf_section_data (s
)->this_hdr
.sh_link
== elf_dynsymtab (abfd
)
4334 && (elf_section_data (s
)->this_hdr
.sh_type
== SHT_REL
4335 || elf_section_data (s
)->this_hdr
.sh_type
== SHT_RELA
))
4340 if (! (*slurp_relocs
) (abfd
, s
, syms
, true))
4342 count
= s
->_raw_size
/ elf_section_data (s
)->this_hdr
.sh_entsize
;
4344 for (i
= 0; i
< count
; i
++)
4355 /* Read in the version information. */
4358 _bfd_elf_slurp_version_tables (abfd
)
4361 bfd_byte
*contents
= NULL
;
4363 if (elf_dynverdef (abfd
) != 0)
4365 Elf_Internal_Shdr
*hdr
;
4366 Elf_External_Verdef
*everdef
;
4367 Elf_Internal_Verdef
*iverdef
;
4370 hdr
= &elf_tdata (abfd
)->dynverdef_hdr
;
4372 elf_tdata (abfd
)->verdef
=
4373 ((Elf_Internal_Verdef
*)
4374 bfd_zalloc (abfd
, hdr
->sh_info
* sizeof (Elf_Internal_Verdef
)));
4375 if (elf_tdata (abfd
)->verdef
== NULL
)
4378 elf_tdata (abfd
)->cverdefs
= hdr
->sh_info
;
4380 contents
= (bfd_byte
*) bfd_malloc (hdr
->sh_size
);
4381 if (contents
== NULL
)
4383 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
4384 || bfd_read ((PTR
) contents
, 1, hdr
->sh_size
, abfd
) != hdr
->sh_size
)
4387 everdef
= (Elf_External_Verdef
*) contents
;
4388 iverdef
= elf_tdata (abfd
)->verdef
;
4389 for (i
= 0; i
< hdr
->sh_info
; i
++, iverdef
++)
4391 Elf_External_Verdaux
*everdaux
;
4392 Elf_Internal_Verdaux
*iverdaux
;
4395 _bfd_elf_swap_verdef_in (abfd
, everdef
, iverdef
);
4397 iverdef
->vd_bfd
= abfd
;
4399 iverdef
->vd_auxptr
= ((Elf_Internal_Verdaux
*)
4402 * sizeof (Elf_Internal_Verdaux
))));
4403 if (iverdef
->vd_auxptr
== NULL
)
4406 everdaux
= ((Elf_External_Verdaux
*)
4407 ((bfd_byte
*) everdef
+ iverdef
->vd_aux
));
4408 iverdaux
= iverdef
->vd_auxptr
;
4409 for (j
= 0; j
< iverdef
->vd_cnt
; j
++, iverdaux
++)
4411 _bfd_elf_swap_verdaux_in (abfd
, everdaux
, iverdaux
);
4413 iverdaux
->vda_nodename
=
4414 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
4415 iverdaux
->vda_name
);
4416 if (iverdaux
->vda_nodename
== NULL
)
4419 if (j
+ 1 < iverdef
->vd_cnt
)
4420 iverdaux
->vda_nextptr
= iverdaux
+ 1;
4422 iverdaux
->vda_nextptr
= NULL
;
4424 everdaux
= ((Elf_External_Verdaux
*)
4425 ((bfd_byte
*) everdaux
+ iverdaux
->vda_next
));
4428 iverdef
->vd_nodename
= iverdef
->vd_auxptr
->vda_nodename
;
4430 if (i
+ 1 < hdr
->sh_info
)
4431 iverdef
->vd_nextdef
= iverdef
+ 1;
4433 iverdef
->vd_nextdef
= NULL
;
4435 everdef
= ((Elf_External_Verdef
*)
4436 ((bfd_byte
*) everdef
+ iverdef
->vd_next
));
4443 if (elf_dynverref (abfd
) != 0)
4445 Elf_Internal_Shdr
*hdr
;
4446 Elf_External_Verneed
*everneed
;
4447 Elf_Internal_Verneed
*iverneed
;
4450 hdr
= &elf_tdata (abfd
)->dynverref_hdr
;
4452 elf_tdata (abfd
)->verref
=
4453 ((Elf_Internal_Verneed
*)
4454 bfd_zalloc (abfd
, hdr
->sh_info
* sizeof (Elf_Internal_Verneed
)));
4455 if (elf_tdata (abfd
)->verref
== NULL
)
4458 elf_tdata (abfd
)->cverrefs
= hdr
->sh_info
;
4460 contents
= (bfd_byte
*) bfd_malloc (hdr
->sh_size
);
4461 if (contents
== NULL
)
4463 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
4464 || bfd_read ((PTR
) contents
, 1, hdr
->sh_size
, abfd
) != hdr
->sh_size
)
4467 everneed
= (Elf_External_Verneed
*) contents
;
4468 iverneed
= elf_tdata (abfd
)->verref
;
4469 for (i
= 0; i
< hdr
->sh_info
; i
++, iverneed
++)
4471 Elf_External_Vernaux
*evernaux
;
4472 Elf_Internal_Vernaux
*ivernaux
;
4475 _bfd_elf_swap_verneed_in (abfd
, everneed
, iverneed
);
4477 iverneed
->vn_bfd
= abfd
;
4479 iverneed
->vn_filename
=
4480 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
4482 if (iverneed
->vn_filename
== NULL
)
4485 iverneed
->vn_auxptr
=
4486 ((Elf_Internal_Vernaux
*)
4488 iverneed
->vn_cnt
* sizeof (Elf_Internal_Vernaux
)));
4490 evernaux
= ((Elf_External_Vernaux
*)
4491 ((bfd_byte
*) everneed
+ iverneed
->vn_aux
));
4492 ivernaux
= iverneed
->vn_auxptr
;
4493 for (j
= 0; j
< iverneed
->vn_cnt
; j
++, ivernaux
++)
4495 _bfd_elf_swap_vernaux_in (abfd
, evernaux
, ivernaux
);
4497 ivernaux
->vna_nodename
=
4498 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
4499 ivernaux
->vna_name
);
4500 if (ivernaux
->vna_nodename
== NULL
)
4503 if (j
+ 1 < iverneed
->vn_cnt
)
4504 ivernaux
->vna_nextptr
= ivernaux
+ 1;
4506 ivernaux
->vna_nextptr
= NULL
;
4508 evernaux
= ((Elf_External_Vernaux
*)
4509 ((bfd_byte
*) evernaux
+ ivernaux
->vna_next
));
4512 if (i
+ 1 < hdr
->sh_info
)
4513 iverneed
->vn_nextref
= iverneed
+ 1;
4515 iverneed
->vn_nextref
= NULL
;
4517 everneed
= ((Elf_External_Verneed
*)
4518 ((bfd_byte
*) everneed
+ iverneed
->vn_next
));
4528 if (contents
== NULL
)
4534 _bfd_elf_make_empty_symbol (abfd
)
4537 elf_symbol_type
*newsym
;
4539 newsym
= (elf_symbol_type
*) bfd_zalloc (abfd
, sizeof (elf_symbol_type
));
4544 newsym
->symbol
.the_bfd
= abfd
;
4545 return &newsym
->symbol
;
4550 _bfd_elf_get_symbol_info (ignore_abfd
, symbol
, ret
)
4551 bfd
*ignore_abfd ATTRIBUTE_UNUSED
;
4555 bfd_symbol_info (symbol
, ret
);
4558 /* Return whether a symbol name implies a local symbol. Most targets
4559 use this function for the is_local_label_name entry point, but some
4563 _bfd_elf_is_local_label_name (abfd
, name
)
4564 bfd
*abfd ATTRIBUTE_UNUSED
;
4567 /* Normal local symbols start with ``.L''. */
4568 if (name
[0] == '.' && name
[1] == 'L')
4571 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
4572 DWARF debugging symbols starting with ``..''. */
4573 if (name
[0] == '.' && name
[1] == '.')
4576 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
4577 emitting DWARF debugging output. I suspect this is actually a
4578 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
4579 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
4580 underscore to be emitted on some ELF targets). For ease of use,
4581 we treat such symbols as local. */
4582 if (name
[0] == '_' && name
[1] == '.' && name
[2] == 'L' && name
[3] == '_')
4589 _bfd_elf_get_lineno (ignore_abfd
, symbol
)
4590 bfd
*ignore_abfd ATTRIBUTE_UNUSED
;
4591 asymbol
*symbol ATTRIBUTE_UNUSED
;
4598 _bfd_elf_set_arch_mach (abfd
, arch
, machine
)
4600 enum bfd_architecture arch
;
4601 unsigned long machine
;
4603 /* If this isn't the right architecture for this backend, and this
4604 isn't the generic backend, fail. */
4605 if (arch
!= get_elf_backend_data (abfd
)->arch
4606 && arch
!= bfd_arch_unknown
4607 && get_elf_backend_data (abfd
)->arch
!= bfd_arch_unknown
)
4610 return bfd_default_set_arch_mach (abfd
, arch
, machine
);
4613 /* Find the nearest line to a particular section and offset, for error
4617 _bfd_elf_find_nearest_line (abfd
,
4628 CONST
char **filename_ptr
;
4629 CONST
char **functionname_ptr
;
4630 unsigned int *line_ptr
;
4633 const char *filename
;
4638 if (_bfd_dwarf1_find_nearest_line (abfd
, section
, symbols
, offset
,
4639 filename_ptr
, functionname_ptr
,
4643 if (_bfd_dwarf2_find_nearest_line (abfd
, section
, symbols
, offset
,
4644 filename_ptr
, functionname_ptr
,
4648 if (! _bfd_stab_section_find_nearest_line (abfd
, symbols
, section
, offset
,
4649 &found
, filename_ptr
,
4650 functionname_ptr
, line_ptr
,
4651 &elf_tdata (abfd
)->line_info
))
4656 if (symbols
== NULL
)
4663 for (p
= symbols
; *p
!= NULL
; p
++)
4667 q
= (elf_symbol_type
*) *p
;
4669 if (bfd_get_section (&q
->symbol
) != section
)
4672 switch (ELF_ST_TYPE (q
->internal_elf_sym
.st_info
))
4677 filename
= bfd_asymbol_name (&q
->symbol
);
4681 if (q
->symbol
.section
== section
4682 && q
->symbol
.value
>= low_func
4683 && q
->symbol
.value
<= offset
)
4685 func
= (asymbol
*) q
;
4686 low_func
= q
->symbol
.value
;
4695 *filename_ptr
= filename
;
4696 *functionname_ptr
= bfd_asymbol_name (func
);
4702 _bfd_elf_sizeof_headers (abfd
, reloc
)
4708 ret
= get_elf_backend_data (abfd
)->s
->sizeof_ehdr
;
4710 ret
+= get_program_header_size (abfd
);
4715 _bfd_elf_set_section_contents (abfd
, section
, location
, offset
, count
)
4720 bfd_size_type count
;
4722 Elf_Internal_Shdr
*hdr
;
4724 if (! abfd
->output_has_begun
4725 && ! _bfd_elf_compute_section_file_positions
4726 (abfd
, (struct bfd_link_info
*) NULL
))
4729 hdr
= &elf_section_data (section
)->this_hdr
;
4731 if (bfd_seek (abfd
, hdr
->sh_offset
+ offset
, SEEK_SET
) == -1)
4733 if (bfd_write (location
, 1, count
, abfd
) != count
)
4740 _bfd_elf_no_info_to_howto (abfd
, cache_ptr
, dst
)
4741 bfd
*abfd ATTRIBUTE_UNUSED
;
4742 arelent
*cache_ptr ATTRIBUTE_UNUSED
;
4743 Elf_Internal_Rela
*dst ATTRIBUTE_UNUSED
;
4750 _bfd_elf_no_info_to_howto_rel (abfd
, cache_ptr
, dst
)
4753 Elf_Internal_Rel
*dst
;
4759 /* Try to convert a non-ELF reloc into an ELF one. */
4762 _bfd_elf_validate_reloc (abfd
, areloc
)
4766 /* Check whether we really have an ELF howto. */
4768 if ((*areloc
->sym_ptr_ptr
)->the_bfd
->xvec
!= abfd
->xvec
)
4770 bfd_reloc_code_real_type code
;
4771 reloc_howto_type
*howto
;
4773 /* Alien reloc: Try to determine its type to replace it with an
4774 equivalent ELF reloc. */
4776 if (areloc
->howto
->pc_relative
)
4778 switch (areloc
->howto
->bitsize
)
4781 code
= BFD_RELOC_8_PCREL
;
4784 code
= BFD_RELOC_12_PCREL
;
4787 code
= BFD_RELOC_16_PCREL
;
4790 code
= BFD_RELOC_24_PCREL
;
4793 code
= BFD_RELOC_32_PCREL
;
4796 code
= BFD_RELOC_64_PCREL
;
4802 howto
= bfd_reloc_type_lookup (abfd
, code
);
4804 if (areloc
->howto
->pcrel_offset
!= howto
->pcrel_offset
)
4806 if (howto
->pcrel_offset
)
4807 areloc
->addend
+= areloc
->address
;
4809 areloc
->addend
-= areloc
->address
; /* addend is unsigned!! */
4814 switch (areloc
->howto
->bitsize
)
4820 code
= BFD_RELOC_14
;
4823 code
= BFD_RELOC_16
;
4826 code
= BFD_RELOC_26
;
4829 code
= BFD_RELOC_32
;
4832 code
= BFD_RELOC_64
;
4838 howto
= bfd_reloc_type_lookup (abfd
, code
);
4842 areloc
->howto
= howto
;
4850 (*_bfd_error_handler
)
4851 (_("%s: unsupported relocation type %s"),
4852 bfd_get_filename (abfd
), areloc
->howto
->name
);
4853 bfd_set_error (bfd_error_bad_value
);
4858 _bfd_elf_close_and_cleanup (abfd
)
4861 if (bfd_get_format (abfd
) == bfd_object
)
4863 if (elf_shstrtab (abfd
) != NULL
)
4864 _bfd_stringtab_free (elf_shstrtab (abfd
));
4867 return _bfd_generic_close_and_cleanup (abfd
);
4870 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
4871 in the relocation's offset. Thus we cannot allow any sort of sanity
4872 range-checking to interfere. There is nothing else to do in processing
4875 bfd_reloc_status_type
4876 _bfd_elf_rel_vtable_reloc_fn (abfd
, re
, symbol
, data
, is
, obfd
, errmsg
)
4877 bfd
*abfd ATTRIBUTE_UNUSED
;
4878 arelent
*re ATTRIBUTE_UNUSED
;
4879 struct symbol_cache_entry
*symbol ATTRIBUTE_UNUSED
;
4880 PTR data ATTRIBUTE_UNUSED
;
4881 asection
*is ATTRIBUTE_UNUSED
;
4882 bfd
*obfd ATTRIBUTE_UNUSED
;
4883 char **errmsg ATTRIBUTE_UNUSED
;
4885 return bfd_reloc_ok
;
4889 /* Elf core file support. Much of this only works on native
4890 toolchains, since we rely on knowing the
4891 machine-dependent procfs structure in order to pick
4892 out details about the corefile. */
4894 #ifdef HAVE_SYS_PROCFS_H
4895 # include <sys/procfs.h>
4899 /* Define offsetof for those systems which lack it. */
4902 # define offsetof(TYPE, MEMBER) ((unsigned long) &((TYPE *)0)->MEMBER)
4906 /* FIXME: this is kinda wrong, but it's what gdb wants. */
4909 elfcore_make_pid (abfd
)
4912 return ((elf_tdata (abfd
)->core_lwpid
<< 16)
4913 + (elf_tdata (abfd
)->core_pid
));
4917 /* If there isn't a section called NAME, make one, using
4918 data from SECT. Note, this function will generate a
4919 reference to NAME, so you shouldn't deallocate or
4923 elfcore_maybe_make_sect (abfd
, name
, sect
)
4930 if (bfd_get_section_by_name (abfd
, name
) != NULL
)
4933 sect2
= bfd_make_section (abfd
, name
);
4937 sect2
->_raw_size
= sect
->_raw_size
;
4938 sect2
->filepos
= sect
->filepos
;
4939 sect2
->flags
= sect
->flags
;
4940 sect2
->alignment_power
= sect
->alignment_power
;
4945 /* prstatus_t exists on:
4947 linux 2.[01] + glibc
4951 #if defined (HAVE_PRSTATUS_T)
4953 elfcore_grok_prstatus (abfd
, note
)
4955 Elf_Internal_Note
* note
;
4962 if (note
->descsz
!= sizeof (prstat
))
4965 memcpy (&prstat
, note
->descdata
, sizeof (prstat
));
4967 elf_tdata (abfd
)->core_signal
= prstat
.pr_cursig
;
4968 elf_tdata (abfd
)->core_pid
= prstat
.pr_pid
;
4970 /* pr_who exists on:
4973 pr_who doesn't exist on:
4976 #if defined (HAVE_PRSTATUS_T_PR_WHO)
4977 elf_tdata (abfd
)->core_lwpid
= prstat
.pr_who
;
4980 /* Make a ".reg/999" section. */
4982 sprintf (buf
, ".reg/%d", elfcore_make_pid (abfd
));
4983 name
= bfd_alloc (abfd
, strlen (buf
) + 1);
4988 sect
= bfd_make_section (abfd
, name
);
4991 sect
->_raw_size
= sizeof (prstat
.pr_reg
);
4992 sect
->filepos
= note
->descpos
+ offsetof (prstatus_t
, pr_reg
);
4993 sect
->flags
= SEC_HAS_CONTENTS
;
4994 sect
->alignment_power
= 2;
4996 if (! elfcore_maybe_make_sect (abfd
, ".reg", sect
))
5001 #endif /* defined (HAVE_PRSTATUS_T) */
5004 /* There isn't a consistent prfpregset_t across platforms,
5005 but it doesn't matter, because we don't have to pick this
5006 data structure apart. */
5009 elfcore_grok_prfpreg (abfd
, note
)
5011 Elf_Internal_Note
* note
;
5017 /* Make a ".reg2/999" section. */
5019 sprintf (buf
, ".reg2/%d", elfcore_make_pid (abfd
));
5020 name
= bfd_alloc (abfd
, strlen (buf
) + 1);
5025 sect
= bfd_make_section (abfd
, name
);
5028 sect
->_raw_size
= note
->descsz
;
5029 sect
->filepos
= note
->descpos
;
5030 sect
->flags
= SEC_HAS_CONTENTS
;
5031 sect
->alignment_power
= 2;
5033 if (! elfcore_maybe_make_sect (abfd
, ".reg2", sect
))
5039 #if defined (HAVE_PRPSINFO_T)
5040 # define elfcore_psinfo_t prpsinfo_t
5043 #if defined (HAVE_PSINFO_T)
5044 # define elfcore_psinfo_t psinfo_t
5048 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
5050 /* return a malloc'ed copy of a string at START which is at
5051 most MAX bytes long, possibly without a terminating '\0'.
5052 the copy will always have a terminating '\0'. */
5055 elfcore_strndup (abfd
, start
, max
)
5061 char* end
= memchr (start
, '\0', max
);
5069 dup
= bfd_alloc (abfd
, len
+ 1);
5073 memcpy (dup
, start
, len
);
5080 elfcore_grok_psinfo (abfd
, note
)
5082 Elf_Internal_Note
* note
;
5084 elfcore_psinfo_t psinfo
;
5086 if (note
->descsz
!= sizeof (elfcore_psinfo_t
))
5089 memcpy (&psinfo
, note
->descdata
, note
->descsz
);
5091 elf_tdata (abfd
)->core_program
5092 = elfcore_strndup (abfd
, psinfo
.pr_fname
, sizeof (psinfo
.pr_fname
));
5094 elf_tdata (abfd
)->core_command
5095 = elfcore_strndup (abfd
, psinfo
.pr_psargs
, sizeof (psinfo
.pr_psargs
));
5097 /* Note that for some reason, a spurious space is tacked
5098 onto the end of the args in some (at least one anyway)
5099 implementations, so strip it off if it exists. */
5102 char* command
= elf_tdata (abfd
)->core_command
;
5103 int n
= strlen (command
);
5105 if (0 < n
&& command
[n
- 1] == ' ')
5106 command
[n
- 1] = '\0';
5111 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
5114 #if defined (HAVE_PSTATUS_T)
5116 elfcore_grok_pstatus (abfd
, note
)
5118 Elf_Internal_Note
* note
;
5122 if (note
->descsz
!= sizeof (pstat
))
5125 memcpy (&pstat
, note
->descdata
, sizeof (pstat
));
5127 elf_tdata (abfd
)->core_pid
= pstat
.pr_pid
;
5129 /* Could grab some more details from the "representative"
5130 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
5131 NT_LWPSTATUS note, presumably. */
5135 #endif /* defined (HAVE_PSTATUS_T) */
5138 #if defined (HAVE_LWPSTATUS_T)
5140 elfcore_grok_lwpstatus (abfd
, note
)
5142 Elf_Internal_Note
* note
;
5144 lwpstatus_t lwpstat
;
5149 if (note
->descsz
!= sizeof (lwpstat
))
5152 memcpy (&lwpstat
, note
->descdata
, sizeof (lwpstat
));
5154 elf_tdata (abfd
)->core_lwpid
= lwpstat
.pr_lwpid
;
5155 elf_tdata (abfd
)->core_signal
= lwpstat
.pr_cursig
;
5157 /* Make a ".reg/999" section. */
5159 sprintf (buf
, ".reg/%d", elfcore_make_pid (abfd
));
5160 name
= bfd_alloc (abfd
, strlen (buf
) + 1);
5165 sect
= bfd_make_section (abfd
, name
);
5169 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
5170 sect
->_raw_size
= sizeof (lwpstat
.pr_context
.uc_mcontext
.gregs
);
5171 sect
->filepos
= note
->descpos
5172 + offsetof (lwpstatus_t
, pr_context
.uc_mcontext
.gregs
);
5175 #if defined (HAVE_LWPSTATUS_T_PR_REG)
5176 sect
->_raw_size
= sizeof (lwpstat
.pr_reg
);
5177 sect
->filepos
= note
->descpos
+ offsetof (lwpstatus_t
, pr_reg
);
5180 sect
->flags
= SEC_HAS_CONTENTS
;
5181 sect
->alignment_power
= 2;
5183 if (!elfcore_maybe_make_sect (abfd
, ".reg", sect
))
5186 /* Make a ".reg2/999" section */
5188 sprintf (buf
, ".reg2/%d", elfcore_make_pid (abfd
));
5189 name
= bfd_alloc (abfd
, strlen (buf
) + 1);
5194 sect
= bfd_make_section (abfd
, name
);
5198 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
5199 sect
->_raw_size
= sizeof (lwpstat
.pr_context
.uc_mcontext
.fpregs
);
5200 sect
->filepos
= note
->descpos
5201 + offsetof (lwpstatus_t
, pr_context
.uc_mcontext
.fpregs
);
5204 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
5205 sect
->_raw_size
= sizeof (lwpstat
.pr_fpreg
);
5206 sect
->filepos
= note
->descpos
+ offsetof (lwpstatus_t
, pr_fpreg
);
5209 sect
->flags
= SEC_HAS_CONTENTS
;
5210 sect
->alignment_power
= 2;
5212 if (!elfcore_maybe_make_sect (abfd
, ".reg2", sect
))
5217 #endif /* defined (HAVE_LWPSTATUS_T) */
5222 elfcore_grok_note (abfd
, note
)
5224 Elf_Internal_Note
* note
;
5231 #if defined (HAVE_PRSTATUS_T)
5233 return elfcore_grok_prstatus (abfd
, note
);
5236 #if defined (HAVE_PSTATUS_T)
5238 return elfcore_grok_pstatus (abfd
, note
);
5241 #if defined (HAVE_LWPSTATUS_T)
5243 return elfcore_grok_lwpstatus (abfd
, note
);
5246 case NT_FPREGSET
: /* FIXME: rename to NT_PRFPREG */
5247 return elfcore_grok_prfpreg (abfd
, note
);
5249 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
5252 return elfcore_grok_psinfo (abfd
, note
);
5259 elfcore_read_notes (abfd
, offset
, size
)
5270 if (bfd_seek (abfd
, offset
, SEEK_SET
) == -1)
5273 buf
= bfd_malloc ((size_t) size
);
5277 if (bfd_read (buf
, size
, 1, abfd
) != size
)
5285 while (p
< buf
+ size
)
5287 /* FIXME: bad alignment assumption. */
5288 Elf_External_Note
* xnp
= (Elf_External_Note
*) p
;
5289 Elf_Internal_Note in
;
5291 in
.type
= bfd_h_get_32 (abfd
, (bfd_byte
*) xnp
->type
);
5293 in
.namesz
= bfd_h_get_32 (abfd
, (bfd_byte
*) xnp
->namesz
);
5294 in
.namedata
= xnp
->name
;
5296 in
.descsz
= bfd_h_get_32 (abfd
, (bfd_byte
*) xnp
->descsz
);
5297 in
.descdata
= in
.namedata
+ BFD_ALIGN (in
.namesz
, 4);
5298 in
.descpos
= offset
+ (in
.descdata
- buf
);
5300 if (! elfcore_grok_note (abfd
, &in
))
5303 p
= in
.descdata
+ BFD_ALIGN (in
.descsz
, 4);
5313 _bfd_elfcore_section_from_phdr (abfd
, phdr
, sec_num
)
5315 Elf_Internal_Phdr
* phdr
;
5318 if (! bfd_section_from_phdr (abfd
, phdr
, sec_num
))
5321 if (phdr
->p_type
== PT_NOTE
5322 && ! elfcore_read_notes (abfd
, phdr
->p_offset
, phdr
->p_filesz
))