1 /* ELF executable support for BFD.
2 Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001
3 Free Software Foundation, Inc.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
26 BFD support for ELF formats is being worked on.
27 Currently, the best supported back ends are for sparc and i386
28 (running svr4 or Solaris 2).
30 Documentation of the internals of the support code still needs
31 to be written. The code is changing quickly enough that we
35 /* For sparc64-cross-sparc32. */
44 static INLINE
struct elf_segment_map
*make_mapping
45 PARAMS ((bfd
*, asection
**, unsigned int, unsigned int, boolean
));
46 static boolean map_sections_to_segments
PARAMS ((bfd
*));
47 static int elf_sort_sections
PARAMS ((const PTR
, const PTR
));
48 static boolean assign_file_positions_for_segments
PARAMS ((bfd
*));
49 static boolean assign_file_positions_except_relocs
PARAMS ((bfd
*));
50 static boolean prep_headers
PARAMS ((bfd
*));
51 static boolean swap_out_syms
PARAMS ((bfd
*, struct bfd_strtab_hash
**, int));
52 static boolean copy_private_bfd_data
PARAMS ((bfd
*, bfd
*));
53 static char *elf_read
PARAMS ((bfd
*, long, unsigned int));
54 static void elf_fake_sections
PARAMS ((bfd
*, asection
*, PTR
));
55 static boolean assign_section_numbers
PARAMS ((bfd
*));
56 static INLINE
int sym_is_global
PARAMS ((bfd
*, asymbol
*));
57 static boolean elf_map_symbols
PARAMS ((bfd
*));
58 static bfd_size_type get_program_header_size
PARAMS ((bfd
*));
59 static boolean elfcore_read_notes
PARAMS ((bfd
*, bfd_vma
, bfd_vma
));
60 static boolean elf_find_function
PARAMS ((bfd
*, asection
*, asymbol
**,
61 bfd_vma
, const char **,
63 static int elfcore_make_pid
PARAMS ((bfd
*));
64 static boolean elfcore_maybe_make_sect
PARAMS ((bfd
*, char *, asection
*));
65 static boolean elfcore_make_note_pseudosection
PARAMS ((bfd
*, char *,
66 Elf_Internal_Note
*));
67 static boolean elfcore_grok_prfpreg
PARAMS ((bfd
*, Elf_Internal_Note
*));
68 static boolean elfcore_grok_prxfpreg
PARAMS ((bfd
*, Elf_Internal_Note
*));
69 static boolean elfcore_grok_note
PARAMS ((bfd
*, Elf_Internal_Note
*));
71 /* Swap version information in and out. The version information is
72 currently size independent. If that ever changes, this code will
73 need to move into elfcode.h. */
75 /* Swap in a Verdef structure. */
78 _bfd_elf_swap_verdef_in (abfd
, src
, dst
)
80 const Elf_External_Verdef
*src
;
81 Elf_Internal_Verdef
*dst
;
83 dst
->vd_version
= bfd_h_get_16 (abfd
, src
->vd_version
);
84 dst
->vd_flags
= bfd_h_get_16 (abfd
, src
->vd_flags
);
85 dst
->vd_ndx
= bfd_h_get_16 (abfd
, src
->vd_ndx
);
86 dst
->vd_cnt
= bfd_h_get_16 (abfd
, src
->vd_cnt
);
87 dst
->vd_hash
= bfd_h_get_32 (abfd
, src
->vd_hash
);
88 dst
->vd_aux
= bfd_h_get_32 (abfd
, src
->vd_aux
);
89 dst
->vd_next
= bfd_h_get_32 (abfd
, src
->vd_next
);
92 /* Swap out a Verdef structure. */
95 _bfd_elf_swap_verdef_out (abfd
, src
, dst
)
97 const Elf_Internal_Verdef
*src
;
98 Elf_External_Verdef
*dst
;
100 bfd_h_put_16 (abfd
, src
->vd_version
, dst
->vd_version
);
101 bfd_h_put_16 (abfd
, src
->vd_flags
, dst
->vd_flags
);
102 bfd_h_put_16 (abfd
, src
->vd_ndx
, dst
->vd_ndx
);
103 bfd_h_put_16 (abfd
, src
->vd_cnt
, dst
->vd_cnt
);
104 bfd_h_put_32 (abfd
, src
->vd_hash
, dst
->vd_hash
);
105 bfd_h_put_32 (abfd
, src
->vd_aux
, dst
->vd_aux
);
106 bfd_h_put_32 (abfd
, src
->vd_next
, dst
->vd_next
);
109 /* Swap in a Verdaux structure. */
112 _bfd_elf_swap_verdaux_in (abfd
, src
, dst
)
114 const Elf_External_Verdaux
*src
;
115 Elf_Internal_Verdaux
*dst
;
117 dst
->vda_name
= bfd_h_get_32 (abfd
, src
->vda_name
);
118 dst
->vda_next
= bfd_h_get_32 (abfd
, src
->vda_next
);
121 /* Swap out a Verdaux structure. */
124 _bfd_elf_swap_verdaux_out (abfd
, src
, dst
)
126 const Elf_Internal_Verdaux
*src
;
127 Elf_External_Verdaux
*dst
;
129 bfd_h_put_32 (abfd
, src
->vda_name
, dst
->vda_name
);
130 bfd_h_put_32 (abfd
, src
->vda_next
, dst
->vda_next
);
133 /* Swap in a Verneed structure. */
136 _bfd_elf_swap_verneed_in (abfd
, src
, dst
)
138 const Elf_External_Verneed
*src
;
139 Elf_Internal_Verneed
*dst
;
141 dst
->vn_version
= bfd_h_get_16 (abfd
, src
->vn_version
);
142 dst
->vn_cnt
= bfd_h_get_16 (abfd
, src
->vn_cnt
);
143 dst
->vn_file
= bfd_h_get_32 (abfd
, src
->vn_file
);
144 dst
->vn_aux
= bfd_h_get_32 (abfd
, src
->vn_aux
);
145 dst
->vn_next
= bfd_h_get_32 (abfd
, src
->vn_next
);
148 /* Swap out a Verneed structure. */
151 _bfd_elf_swap_verneed_out (abfd
, src
, dst
)
153 const Elf_Internal_Verneed
*src
;
154 Elf_External_Verneed
*dst
;
156 bfd_h_put_16 (abfd
, src
->vn_version
, dst
->vn_version
);
157 bfd_h_put_16 (abfd
, src
->vn_cnt
, dst
->vn_cnt
);
158 bfd_h_put_32 (abfd
, src
->vn_file
, dst
->vn_file
);
159 bfd_h_put_32 (abfd
, src
->vn_aux
, dst
->vn_aux
);
160 bfd_h_put_32 (abfd
, src
->vn_next
, dst
->vn_next
);
163 /* Swap in a Vernaux structure. */
166 _bfd_elf_swap_vernaux_in (abfd
, src
, dst
)
168 const Elf_External_Vernaux
*src
;
169 Elf_Internal_Vernaux
*dst
;
171 dst
->vna_hash
= bfd_h_get_32 (abfd
, src
->vna_hash
);
172 dst
->vna_flags
= bfd_h_get_16 (abfd
, src
->vna_flags
);
173 dst
->vna_other
= bfd_h_get_16 (abfd
, src
->vna_other
);
174 dst
->vna_name
= bfd_h_get_32 (abfd
, src
->vna_name
);
175 dst
->vna_next
= bfd_h_get_32 (abfd
, src
->vna_next
);
178 /* Swap out a Vernaux structure. */
181 _bfd_elf_swap_vernaux_out (abfd
, src
, dst
)
183 const Elf_Internal_Vernaux
*src
;
184 Elf_External_Vernaux
*dst
;
186 bfd_h_put_32 (abfd
, src
->vna_hash
, dst
->vna_hash
);
187 bfd_h_put_16 (abfd
, src
->vna_flags
, dst
->vna_flags
);
188 bfd_h_put_16 (abfd
, src
->vna_other
, dst
->vna_other
);
189 bfd_h_put_32 (abfd
, src
->vna_name
, dst
->vna_name
);
190 bfd_h_put_32 (abfd
, src
->vna_next
, dst
->vna_next
);
193 /* Swap in a Versym structure. */
196 _bfd_elf_swap_versym_in (abfd
, src
, dst
)
198 const Elf_External_Versym
*src
;
199 Elf_Internal_Versym
*dst
;
201 dst
->vs_vers
= bfd_h_get_16 (abfd
, src
->vs_vers
);
204 /* Swap out a Versym structure. */
207 _bfd_elf_swap_versym_out (abfd
, src
, dst
)
209 const Elf_Internal_Versym
*src
;
210 Elf_External_Versym
*dst
;
212 bfd_h_put_16 (abfd
, src
->vs_vers
, dst
->vs_vers
);
215 /* Standard ELF hash function. Do not change this function; you will
216 cause invalid hash tables to be generated. */
219 bfd_elf_hash (namearg
)
222 const unsigned char *name
= (const unsigned char *) namearg
;
227 while ((ch
= *name
++) != '\0')
230 if ((g
= (h
& 0xf0000000)) != 0)
233 /* The ELF ABI says `h &= ~g', but this is equivalent in
234 this case and on some machines one insn instead of two. */
241 /* Read a specified number of bytes at a specified offset in an ELF
242 file, into a newly allocated buffer, and return a pointer to the
246 elf_read (abfd
, offset
, size
)
253 if ((buf
= bfd_alloc (abfd
, size
)) == NULL
)
255 if (bfd_seek (abfd
, offset
, SEEK_SET
) == -1)
257 if (bfd_read ((PTR
) buf
, size
, 1, abfd
) != size
)
259 if (bfd_get_error () != bfd_error_system_call
)
260 bfd_set_error (bfd_error_file_truncated
);
267 bfd_elf_mkobject (abfd
)
270 /* This just does initialization. */
271 /* coff_mkobject zalloc's space for tdata.coff_obj_data ... */
272 elf_tdata (abfd
) = (struct elf_obj_tdata
*)
273 bfd_zalloc (abfd
, sizeof (struct elf_obj_tdata
));
274 if (elf_tdata (abfd
) == 0)
276 /* Since everything is done at close time, do we need any
283 bfd_elf_mkcorefile (abfd
)
286 /* I think this can be done just like an object file. */
287 return bfd_elf_mkobject (abfd
);
291 bfd_elf_get_str_section (abfd
, shindex
)
293 unsigned int shindex
;
295 Elf_Internal_Shdr
**i_shdrp
;
296 char *shstrtab
= NULL
;
298 unsigned int shstrtabsize
;
300 i_shdrp
= elf_elfsections (abfd
);
301 if (i_shdrp
== 0 || i_shdrp
[shindex
] == 0)
304 shstrtab
= (char *) i_shdrp
[shindex
]->contents
;
305 if (shstrtab
== NULL
)
307 /* No cached one, attempt to read, and cache what we read. */
308 offset
= i_shdrp
[shindex
]->sh_offset
;
309 shstrtabsize
= i_shdrp
[shindex
]->sh_size
;
310 shstrtab
= elf_read (abfd
, offset
, shstrtabsize
);
311 i_shdrp
[shindex
]->contents
= (PTR
) shstrtab
;
317 bfd_elf_string_from_elf_section (abfd
, shindex
, strindex
)
319 unsigned int shindex
;
320 unsigned int strindex
;
322 Elf_Internal_Shdr
*hdr
;
327 hdr
= elf_elfsections (abfd
)[shindex
];
329 if (hdr
->contents
== NULL
330 && bfd_elf_get_str_section (abfd
, shindex
) == NULL
)
333 if (strindex
>= hdr
->sh_size
)
335 (*_bfd_error_handler
)
336 (_("%s: invalid string offset %u >= %lu for section `%s'"),
337 bfd_get_filename (abfd
), strindex
, (unsigned long) hdr
->sh_size
,
338 ((shindex
== elf_elfheader(abfd
)->e_shstrndx
339 && strindex
== hdr
->sh_name
)
341 : elf_string_from_elf_strtab (abfd
, hdr
->sh_name
)));
345 return ((char *) hdr
->contents
) + strindex
;
348 /* Make a BFD section from an ELF section. We store a pointer to the
349 BFD section in the bfd_section field of the header. */
352 _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
)
354 Elf_Internal_Shdr
*hdr
;
359 struct elf_backend_data
*bed
;
361 if (hdr
->bfd_section
!= NULL
)
363 BFD_ASSERT (strcmp (name
,
364 bfd_get_section_name (abfd
, hdr
->bfd_section
)) == 0);
368 newsect
= bfd_make_section_anyway (abfd
, name
);
372 newsect
->filepos
= hdr
->sh_offset
;
374 if (! bfd_set_section_vma (abfd
, newsect
, hdr
->sh_addr
)
375 || ! bfd_set_section_size (abfd
, newsect
, hdr
->sh_size
)
376 || ! bfd_set_section_alignment (abfd
, newsect
,
377 bfd_log2 (hdr
->sh_addralign
)))
380 flags
= SEC_NO_FLAGS
;
381 if (hdr
->sh_type
!= SHT_NOBITS
)
382 flags
|= SEC_HAS_CONTENTS
;
383 if ((hdr
->sh_flags
& SHF_ALLOC
) != 0)
386 if (hdr
->sh_type
!= SHT_NOBITS
)
389 if ((hdr
->sh_flags
& SHF_WRITE
) == 0)
390 flags
|= SEC_READONLY
;
391 if ((hdr
->sh_flags
& SHF_EXECINSTR
) != 0)
393 else if ((flags
& SEC_LOAD
) != 0)
395 if ((hdr
->sh_flags
& SHF_MERGE
) != 0)
398 newsect
->entsize
= hdr
->sh_entsize
;
399 if ((hdr
->sh_flags
& SHF_STRINGS
) != 0)
400 flags
|= SEC_STRINGS
;
403 /* The debugging sections appear to be recognized only by name, not
406 static const char *debug_sec_names
[] =
415 for (i
= sizeof (debug_sec_names
) / sizeof (debug_sec_names
[0]); i
--;)
416 if (strncmp (name
, debug_sec_names
[i
], strlen (debug_sec_names
[i
])) == 0)
420 flags
|= SEC_DEBUGGING
;
423 /* As a GNU extension, if the name begins with .gnu.linkonce, we
424 only link a single copy of the section. This is used to support
425 g++. g++ will emit each template expansion in its own section.
426 The symbols will be defined as weak, so that multiple definitions
427 are permitted. The GNU linker extension is to actually discard
428 all but one of the sections. */
429 if (strncmp (name
, ".gnu.linkonce", sizeof ".gnu.linkonce" - 1) == 0)
430 flags
|= SEC_LINK_ONCE
| SEC_LINK_DUPLICATES_DISCARD
;
432 bed
= get_elf_backend_data (abfd
);
433 if (bed
->elf_backend_section_flags
)
434 if (! bed
->elf_backend_section_flags (&flags
, hdr
))
437 if (! bfd_set_section_flags (abfd
, newsect
, flags
))
440 if ((flags
& SEC_ALLOC
) != 0)
442 Elf_Internal_Phdr
*phdr
;
445 /* Look through the phdrs to see if we need to adjust the lma.
446 If all the p_paddr fields are zero, we ignore them, since
447 some ELF linkers produce such output. */
448 phdr
= elf_tdata (abfd
)->phdr
;
449 for (i
= 0; i
< elf_elfheader (abfd
)->e_phnum
; i
++, phdr
++)
451 if (phdr
->p_paddr
!= 0)
454 if (i
< elf_elfheader (abfd
)->e_phnum
)
456 phdr
= elf_tdata (abfd
)->phdr
;
457 for (i
= 0; i
< elf_elfheader (abfd
)->e_phnum
; i
++, phdr
++)
459 if (phdr
->p_type
== PT_LOAD
460 && phdr
->p_vaddr
!= phdr
->p_paddr
461 && phdr
->p_vaddr
<= hdr
->sh_addr
462 && (phdr
->p_vaddr
+ phdr
->p_memsz
463 >= hdr
->sh_addr
+ hdr
->sh_size
)
464 && ((flags
& SEC_LOAD
) == 0
465 || (phdr
->p_offset
<= (bfd_vma
) hdr
->sh_offset
466 && (phdr
->p_offset
+ phdr
->p_filesz
467 >= hdr
->sh_offset
+ hdr
->sh_size
))))
469 newsect
->lma
+= phdr
->p_paddr
- phdr
->p_vaddr
;
476 hdr
->bfd_section
= newsect
;
477 elf_section_data (newsect
)->this_hdr
= *hdr
;
487 struct elf_internal_shdr *bfd_elf_find_section (bfd *abfd, char *name);
490 Helper functions for GDB to locate the string tables.
491 Since BFD hides string tables from callers, GDB needs to use an
492 internal hook to find them. Sun's .stabstr, in particular,
493 isn't even pointed to by the .stab section, so ordinary
494 mechanisms wouldn't work to find it, even if we had some.
497 struct elf_internal_shdr
*
498 bfd_elf_find_section (abfd
, name
)
502 Elf_Internal_Shdr
**i_shdrp
;
507 i_shdrp
= elf_elfsections (abfd
);
510 shstrtab
= bfd_elf_get_str_section
511 (abfd
, elf_elfheader (abfd
)->e_shstrndx
);
512 if (shstrtab
!= NULL
)
514 max
= elf_elfheader (abfd
)->e_shnum
;
515 for (i
= 1; i
< max
; i
++)
516 if (!strcmp (&shstrtab
[i_shdrp
[i
]->sh_name
], name
))
523 const char *const bfd_elf_section_type_names
[] = {
524 "SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB",
525 "SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE",
526 "SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM",
529 /* ELF relocs are against symbols. If we are producing relocateable
530 output, and the reloc is against an external symbol, and nothing
531 has given us any additional addend, the resulting reloc will also
532 be against the same symbol. In such a case, we don't want to
533 change anything about the way the reloc is handled, since it will
534 all be done at final link time. Rather than put special case code
535 into bfd_perform_relocation, all the reloc types use this howto
536 function. It just short circuits the reloc if producing
537 relocateable output against an external symbol. */
539 bfd_reloc_status_type
540 bfd_elf_generic_reloc (abfd
,
547 bfd
*abfd ATTRIBUTE_UNUSED
;
548 arelent
*reloc_entry
;
550 PTR data ATTRIBUTE_UNUSED
;
551 asection
*input_section
;
553 char **error_message ATTRIBUTE_UNUSED
;
555 if (output_bfd
!= (bfd
*) NULL
556 && (symbol
->flags
& BSF_SECTION_SYM
) == 0
557 && (! reloc_entry
->howto
->partial_inplace
558 || reloc_entry
->addend
== 0))
560 reloc_entry
->address
+= input_section
->output_offset
;
564 return bfd_reloc_continue
;
567 /* Finish SHF_MERGE section merging. */
570 _bfd_elf_merge_sections (abfd
, info
)
572 struct bfd_link_info
*info
;
574 if (!is_elf_hash_table (info
))
576 if (elf_hash_table (info
)->merge_info
)
577 _bfd_merge_sections (abfd
, elf_hash_table (info
)->merge_info
);
581 /* Print out the program headers. */
584 _bfd_elf_print_private_bfd_data (abfd
, farg
)
588 FILE *f
= (FILE *) farg
;
589 Elf_Internal_Phdr
*p
;
591 bfd_byte
*dynbuf
= NULL
;
593 p
= elf_tdata (abfd
)->phdr
;
598 fprintf (f
, _("\nProgram Header:\n"));
599 c
= elf_elfheader (abfd
)->e_phnum
;
600 for (i
= 0; i
< c
; i
++, p
++)
607 case PT_NULL
: s
= "NULL"; break;
608 case PT_LOAD
: s
= "LOAD"; break;
609 case PT_DYNAMIC
: s
= "DYNAMIC"; break;
610 case PT_INTERP
: s
= "INTERP"; break;
611 case PT_NOTE
: s
= "NOTE"; break;
612 case PT_SHLIB
: s
= "SHLIB"; break;
613 case PT_PHDR
: s
= "PHDR"; break;
614 default: sprintf (buf
, "0x%lx", p
->p_type
); s
= buf
; break;
616 fprintf (f
, "%8s off 0x", s
);
617 bfd_fprintf_vma (abfd
, f
, p
->p_offset
);
618 fprintf (f
, " vaddr 0x");
619 bfd_fprintf_vma (abfd
, f
, p
->p_vaddr
);
620 fprintf (f
, " paddr 0x");
621 bfd_fprintf_vma (abfd
, f
, p
->p_paddr
);
622 fprintf (f
, " align 2**%u\n", bfd_log2 (p
->p_align
));
623 fprintf (f
, " filesz 0x");
624 bfd_fprintf_vma (abfd
, f
, p
->p_filesz
);
625 fprintf (f
, " memsz 0x");
626 bfd_fprintf_vma (abfd
, f
, p
->p_memsz
);
627 fprintf (f
, " flags %c%c%c",
628 (p
->p_flags
& PF_R
) != 0 ? 'r' : '-',
629 (p
->p_flags
& PF_W
) != 0 ? 'w' : '-',
630 (p
->p_flags
& PF_X
) != 0 ? 'x' : '-');
631 if ((p
->p_flags
&~ (PF_R
| PF_W
| PF_X
)) != 0)
632 fprintf (f
, " %lx", p
->p_flags
&~ (PF_R
| PF_W
| PF_X
));
637 s
= bfd_get_section_by_name (abfd
, ".dynamic");
642 bfd_byte
*extdyn
, *extdynend
;
644 void (*swap_dyn_in
) PARAMS ((bfd
*, const PTR
, Elf_Internal_Dyn
*));
646 fprintf (f
, _("\nDynamic Section:\n"));
648 dynbuf
= (bfd_byte
*) bfd_malloc (s
->_raw_size
);
651 if (! bfd_get_section_contents (abfd
, s
, (PTR
) dynbuf
, (file_ptr
) 0,
655 elfsec
= _bfd_elf_section_from_bfd_section (abfd
, s
);
658 link
= elf_elfsections (abfd
)[elfsec
]->sh_link
;
660 extdynsize
= get_elf_backend_data (abfd
)->s
->sizeof_dyn
;
661 swap_dyn_in
= get_elf_backend_data (abfd
)->s
->swap_dyn_in
;
664 extdynend
= extdyn
+ s
->_raw_size
;
665 for (; extdyn
< extdynend
; extdyn
+= extdynsize
)
667 Elf_Internal_Dyn dyn
;
672 (*swap_dyn_in
) (abfd
, (PTR
) extdyn
, &dyn
);
674 if (dyn
.d_tag
== DT_NULL
)
681 sprintf (ab
, "0x%lx", (unsigned long) dyn
.d_tag
);
685 case DT_NEEDED
: name
= "NEEDED"; stringp
= true; break;
686 case DT_PLTRELSZ
: name
= "PLTRELSZ"; break;
687 case DT_PLTGOT
: name
= "PLTGOT"; break;
688 case DT_HASH
: name
= "HASH"; break;
689 case DT_STRTAB
: name
= "STRTAB"; break;
690 case DT_SYMTAB
: name
= "SYMTAB"; break;
691 case DT_RELA
: name
= "RELA"; break;
692 case DT_RELASZ
: name
= "RELASZ"; break;
693 case DT_RELAENT
: name
= "RELAENT"; break;
694 case DT_STRSZ
: name
= "STRSZ"; break;
695 case DT_SYMENT
: name
= "SYMENT"; break;
696 case DT_INIT
: name
= "INIT"; break;
697 case DT_FINI
: name
= "FINI"; break;
698 case DT_SONAME
: name
= "SONAME"; stringp
= true; break;
699 case DT_RPATH
: name
= "RPATH"; stringp
= true; break;
700 case DT_SYMBOLIC
: name
= "SYMBOLIC"; break;
701 case DT_REL
: name
= "REL"; break;
702 case DT_RELSZ
: name
= "RELSZ"; break;
703 case DT_RELENT
: name
= "RELENT"; break;
704 case DT_PLTREL
: name
= "PLTREL"; break;
705 case DT_DEBUG
: name
= "DEBUG"; break;
706 case DT_TEXTREL
: name
= "TEXTREL"; break;
707 case DT_JMPREL
: name
= "JMPREL"; break;
708 case DT_BIND_NOW
: name
= "BIND_NOW"; break;
709 case DT_INIT_ARRAY
: name
= "INIT_ARRAY"; break;
710 case DT_FINI_ARRAY
: name
= "FINI_ARRAY"; break;
711 case DT_INIT_ARRAYSZ
: name
= "INIT_ARRAYSZ"; break;
712 case DT_FINI_ARRAYSZ
: name
= "FINI_ARRAYSZ"; break;
713 case DT_RUNPATH
: name
= "RUNPATH"; stringp
= true; break;
714 case DT_FLAGS
: name
= "FLAGS"; break;
715 case DT_PREINIT_ARRAY
: name
= "PREINIT_ARRAY"; break;
716 case DT_PREINIT_ARRAYSZ
: name
= "PREINIT_ARRAYSZ"; break;
717 case DT_CHECKSUM
: name
= "CHECKSUM"; break;
718 case DT_PLTPADSZ
: name
= "PLTPADSZ"; break;
719 case DT_MOVEENT
: name
= "MOVEENT"; break;
720 case DT_MOVESZ
: name
= "MOVESZ"; break;
721 case DT_FEATURE
: name
= "FEATURE"; break;
722 case DT_POSFLAG_1
: name
= "POSFLAG_1"; break;
723 case DT_SYMINSZ
: name
= "SYMINSZ"; break;
724 case DT_SYMINENT
: name
= "SYMINENT"; break;
725 case DT_CONFIG
: name
= "CONFIG"; stringp
= true; break;
726 case DT_DEPAUDIT
: name
= "DEPAUDIT"; stringp
= true; break;
727 case DT_AUDIT
: name
= "AUDIT"; stringp
= true; break;
728 case DT_PLTPAD
: name
= "PLTPAD"; break;
729 case DT_MOVETAB
: name
= "MOVETAB"; break;
730 case DT_SYMINFO
: name
= "SYMINFO"; break;
731 case DT_RELACOUNT
: name
= "RELACOUNT"; break;
732 case DT_RELCOUNT
: name
= "RELCOUNT"; break;
733 case DT_FLAGS_1
: name
= "FLAGS_1"; break;
734 case DT_VERSYM
: name
= "VERSYM"; break;
735 case DT_VERDEF
: name
= "VERDEF"; break;
736 case DT_VERDEFNUM
: name
= "VERDEFNUM"; break;
737 case DT_VERNEED
: name
= "VERNEED"; break;
738 case DT_VERNEEDNUM
: name
= "VERNEEDNUM"; break;
739 case DT_AUXILIARY
: name
= "AUXILIARY"; stringp
= true; break;
740 case DT_USED
: name
= "USED"; break;
741 case DT_FILTER
: name
= "FILTER"; stringp
= true; break;
744 fprintf (f
, " %-11s ", name
);
746 fprintf (f
, "0x%lx", (unsigned long) dyn
.d_un
.d_val
);
751 string
= bfd_elf_string_from_elf_section (abfd
, link
,
755 fprintf (f
, "%s", string
);
764 if ((elf_dynverdef (abfd
) != 0 && elf_tdata (abfd
)->verdef
== NULL
)
765 || (elf_dynverref (abfd
) != 0 && elf_tdata (abfd
)->verref
== NULL
))
767 if (! _bfd_elf_slurp_version_tables (abfd
))
771 if (elf_dynverdef (abfd
) != 0)
773 Elf_Internal_Verdef
*t
;
775 fprintf (f
, _("\nVersion definitions:\n"));
776 for (t
= elf_tdata (abfd
)->verdef
; t
!= NULL
; t
= t
->vd_nextdef
)
778 fprintf (f
, "%d 0x%2.2x 0x%8.8lx %s\n", t
->vd_ndx
,
779 t
->vd_flags
, t
->vd_hash
, t
->vd_nodename
);
780 if (t
->vd_auxptr
->vda_nextptr
!= NULL
)
782 Elf_Internal_Verdaux
*a
;
785 for (a
= t
->vd_auxptr
->vda_nextptr
;
788 fprintf (f
, "%s ", a
->vda_nodename
);
794 if (elf_dynverref (abfd
) != 0)
796 Elf_Internal_Verneed
*t
;
798 fprintf (f
, _("\nVersion References:\n"));
799 for (t
= elf_tdata (abfd
)->verref
; t
!= NULL
; t
= t
->vn_nextref
)
801 Elf_Internal_Vernaux
*a
;
803 fprintf (f
, _(" required from %s:\n"), t
->vn_filename
);
804 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
805 fprintf (f
, " 0x%8.8lx 0x%2.2x %2.2d %s\n", a
->vna_hash
,
806 a
->vna_flags
, a
->vna_other
, a
->vna_nodename
);
818 /* Display ELF-specific fields of a symbol. */
821 bfd_elf_print_symbol (abfd
, filep
, symbol
, how
)
825 bfd_print_symbol_type how
;
827 FILE *file
= (FILE *) filep
;
830 case bfd_print_symbol_name
:
831 fprintf (file
, "%s", symbol
->name
);
833 case bfd_print_symbol_more
:
834 fprintf (file
, "elf ");
835 bfd_fprintf_vma (abfd
, file
, symbol
->value
);
836 fprintf (file
, " %lx", (long) symbol
->flags
);
838 case bfd_print_symbol_all
:
840 const char *section_name
;
841 const char *name
= NULL
;
842 struct elf_backend_data
*bed
;
843 unsigned char st_other
;
845 section_name
= symbol
->section
? symbol
->section
->name
: "(*none*)";
847 bed
= get_elf_backend_data (abfd
);
848 if (bed
->elf_backend_print_symbol_all
)
849 name
= (*bed
->elf_backend_print_symbol_all
) (abfd
, filep
, symbol
);
854 bfd_print_symbol_vandf (abfd
, (PTR
) file
, symbol
);
857 fprintf (file
, " %s\t", section_name
);
858 /* Print the "other" value for a symbol. For common symbols,
859 we've already printed the size; now print the alignment.
860 For other symbols, we have no specified alignment, and
861 we've printed the address; now print the size. */
862 bfd_fprintf_vma (abfd
, file
,
863 (bfd_is_com_section (symbol
->section
)
864 ? ((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_value
865 : ((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_size
));
867 /* If we have version information, print it. */
868 if (elf_tdata (abfd
)->dynversym_section
!= 0
869 && (elf_tdata (abfd
)->dynverdef_section
!= 0
870 || elf_tdata (abfd
)->dynverref_section
!= 0))
873 const char *version_string
;
875 vernum
= ((elf_symbol_type
*) symbol
)->version
& VERSYM_VERSION
;
879 else if (vernum
== 1)
880 version_string
= "Base";
881 else if (vernum
<= elf_tdata (abfd
)->cverdefs
)
883 elf_tdata (abfd
)->verdef
[vernum
- 1].vd_nodename
;
886 Elf_Internal_Verneed
*t
;
889 for (t
= elf_tdata (abfd
)->verref
;
893 Elf_Internal_Vernaux
*a
;
895 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
897 if (a
->vna_other
== vernum
)
899 version_string
= a
->vna_nodename
;
906 if ((((elf_symbol_type
*) symbol
)->version
& VERSYM_HIDDEN
) == 0)
907 fprintf (file
, " %-11s", version_string
);
912 fprintf (file
, " (%s)", version_string
);
913 for (i
= 10 - strlen (version_string
); i
> 0; --i
)
918 /* If the st_other field is not zero, print it. */
919 st_other
= ((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_other
;
924 case STV_INTERNAL
: fprintf (file
, " .internal"); break;
925 case STV_HIDDEN
: fprintf (file
, " .hidden"); break;
926 case STV_PROTECTED
: fprintf (file
, " .protected"); break;
928 /* Some other non-defined flags are also present, so print
930 fprintf (file
, " 0x%02x", (unsigned int) st_other
);
933 fprintf (file
, " %s", name
);
939 /* Create an entry in an ELF linker hash table. */
941 struct bfd_hash_entry
*
942 _bfd_elf_link_hash_newfunc (entry
, table
, string
)
943 struct bfd_hash_entry
*entry
;
944 struct bfd_hash_table
*table
;
947 struct elf_link_hash_entry
*ret
= (struct elf_link_hash_entry
*) entry
;
949 /* Allocate the structure if it has not already been allocated by a
951 if (ret
== (struct elf_link_hash_entry
*) NULL
)
952 ret
= ((struct elf_link_hash_entry
*)
953 bfd_hash_allocate (table
, sizeof (struct elf_link_hash_entry
)));
954 if (ret
== (struct elf_link_hash_entry
*) NULL
)
955 return (struct bfd_hash_entry
*) ret
;
957 /* Call the allocation method of the superclass. */
958 ret
= ((struct elf_link_hash_entry
*)
959 _bfd_link_hash_newfunc ((struct bfd_hash_entry
*) ret
,
961 if (ret
!= (struct elf_link_hash_entry
*) NULL
)
963 /* Set local fields. */
967 ret
->dynstr_index
= 0;
969 ret
->got
.offset
= (bfd_vma
) -1;
970 ret
->plt
.offset
= (bfd_vma
) -1;
971 ret
->linker_section_pointer
= (elf_linker_section_pointers_t
*)0;
972 ret
->verinfo
.verdef
= NULL
;
973 ret
->vtable_entries_used
= NULL
;
974 ret
->vtable_entries_size
= 0;
975 ret
->vtable_parent
= NULL
;
976 ret
->type
= STT_NOTYPE
;
978 /* Assume that we have been called by a non-ELF symbol reader.
979 This flag is then reset by the code which reads an ELF input
980 file. This ensures that a symbol created by a non-ELF symbol
981 reader will have the flag set correctly. */
982 ret
->elf_link_hash_flags
= ELF_LINK_NON_ELF
;
985 return (struct bfd_hash_entry
*) ret
;
988 /* Copy data from an indirect symbol to its direct symbol, hiding the
989 old indirect symbol. */
992 _bfd_elf_link_hash_copy_indirect (dir
, ind
)
993 struct elf_link_hash_entry
*dir
, *ind
;
995 /* Copy down any references that we may have already seen to the
996 symbol which just became indirect. */
998 dir
->elf_link_hash_flags
|=
999 (ind
->elf_link_hash_flags
1000 & (ELF_LINK_HASH_REF_DYNAMIC
1001 | ELF_LINK_HASH_REF_REGULAR
1002 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
1003 | ELF_LINK_NON_GOT_REF
));
1005 /* Copy over the global and procedure linkage table offset entries.
1006 These may have been already set up by a check_relocs routine. */
1007 if (dir
->got
.offset
== (bfd_vma
) -1)
1009 dir
->got
.offset
= ind
->got
.offset
;
1010 ind
->got
.offset
= (bfd_vma
) -1;
1012 BFD_ASSERT (ind
->got
.offset
== (bfd_vma
) -1);
1014 if (dir
->plt
.offset
== (bfd_vma
) -1)
1016 dir
->plt
.offset
= ind
->plt
.offset
;
1017 ind
->plt
.offset
= (bfd_vma
) -1;
1019 BFD_ASSERT (ind
->plt
.offset
== (bfd_vma
) -1);
1021 if (dir
->dynindx
== -1)
1023 dir
->dynindx
= ind
->dynindx
;
1024 dir
->dynstr_index
= ind
->dynstr_index
;
1026 ind
->dynstr_index
= 0;
1028 BFD_ASSERT (ind
->dynindx
== -1);
1032 _bfd_elf_link_hash_hide_symbol (info
, h
)
1033 struct bfd_link_info
*info ATTRIBUTE_UNUSED
;
1034 struct elf_link_hash_entry
*h
;
1036 h
->elf_link_hash_flags
&= ~ELF_LINK_HASH_NEEDS_PLT
;
1037 h
->plt
.offset
= (bfd_vma
) -1;
1038 if ((h
->elf_link_hash_flags
& ELF_LINK_FORCED_LOCAL
) != 0)
1042 /* Initialize an ELF linker hash table. */
1045 _bfd_elf_link_hash_table_init (table
, abfd
, newfunc
)
1046 struct elf_link_hash_table
*table
;
1048 struct bfd_hash_entry
*(*newfunc
) PARAMS ((struct bfd_hash_entry
*,
1049 struct bfd_hash_table
*,
1054 table
->dynamic_sections_created
= false;
1055 table
->dynobj
= NULL
;
1056 /* The first dynamic symbol is a dummy. */
1057 table
->dynsymcount
= 1;
1058 table
->dynstr
= NULL
;
1059 table
->bucketcount
= 0;
1060 table
->needed
= NULL
;
1061 table
->runpath
= NULL
;
1063 table
->stab_info
= NULL
;
1064 table
->merge_info
= NULL
;
1065 table
->dynlocal
= NULL
;
1066 ret
= _bfd_link_hash_table_init (& table
->root
, abfd
, newfunc
);
1067 table
->root
.type
= bfd_link_elf_hash_table
;
1072 /* Create an ELF linker hash table. */
1074 struct bfd_link_hash_table
*
1075 _bfd_elf_link_hash_table_create (abfd
)
1078 struct elf_link_hash_table
*ret
;
1080 ret
= ((struct elf_link_hash_table
*)
1081 bfd_alloc (abfd
, sizeof (struct elf_link_hash_table
)));
1082 if (ret
== (struct elf_link_hash_table
*) NULL
)
1085 if (! _bfd_elf_link_hash_table_init (ret
, abfd
, _bfd_elf_link_hash_newfunc
))
1087 bfd_release (abfd
, ret
);
1094 /* This is a hook for the ELF emulation code in the generic linker to
1095 tell the backend linker what file name to use for the DT_NEEDED
1096 entry for a dynamic object. The generic linker passes name as an
1097 empty string to indicate that no DT_NEEDED entry should be made. */
1100 bfd_elf_set_dt_needed_name (abfd
, name
)
1104 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1105 && bfd_get_format (abfd
) == bfd_object
)
1106 elf_dt_name (abfd
) = name
;
1110 bfd_elf_set_dt_needed_soname (abfd
, name
)
1114 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1115 && bfd_get_format (abfd
) == bfd_object
)
1116 elf_dt_soname (abfd
) = name
;
1119 /* Get the list of DT_NEEDED entries for a link. This is a hook for
1120 the linker ELF emulation code. */
1122 struct bfd_link_needed_list
*
1123 bfd_elf_get_needed_list (abfd
, info
)
1124 bfd
*abfd ATTRIBUTE_UNUSED
;
1125 struct bfd_link_info
*info
;
1127 if (info
->hash
->creator
->flavour
!= bfd_target_elf_flavour
)
1129 return elf_hash_table (info
)->needed
;
1132 /* Get the list of DT_RPATH/DT_RUNPATH entries for a link. This is a
1133 hook for the linker ELF emulation code. */
1135 struct bfd_link_needed_list
*
1136 bfd_elf_get_runpath_list (abfd
, info
)
1137 bfd
*abfd ATTRIBUTE_UNUSED
;
1138 struct bfd_link_info
*info
;
1140 if (info
->hash
->creator
->flavour
!= bfd_target_elf_flavour
)
1142 return elf_hash_table (info
)->runpath
;
1145 /* Get the name actually used for a dynamic object for a link. This
1146 is the SONAME entry if there is one. Otherwise, it is the string
1147 passed to bfd_elf_set_dt_needed_name, or it is the filename. */
1150 bfd_elf_get_dt_soname (abfd
)
1153 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1154 && bfd_get_format (abfd
) == bfd_object
)
1155 return elf_dt_name (abfd
);
1159 /* Get the list of DT_NEEDED entries from a BFD. This is a hook for
1160 the ELF linker emulation code. */
1163 bfd_elf_get_bfd_needed_list (abfd
, pneeded
)
1165 struct bfd_link_needed_list
**pneeded
;
1168 bfd_byte
*dynbuf
= NULL
;
1171 bfd_byte
*extdyn
, *extdynend
;
1173 void (*swap_dyn_in
) PARAMS ((bfd
*, const PTR
, Elf_Internal_Dyn
*));
1177 if (bfd_get_flavour (abfd
) != bfd_target_elf_flavour
1178 || bfd_get_format (abfd
) != bfd_object
)
1181 s
= bfd_get_section_by_name (abfd
, ".dynamic");
1182 if (s
== NULL
|| s
->_raw_size
== 0)
1185 dynbuf
= (bfd_byte
*) bfd_malloc (s
->_raw_size
);
1189 if (! bfd_get_section_contents (abfd
, s
, (PTR
) dynbuf
, (file_ptr
) 0,
1193 elfsec
= _bfd_elf_section_from_bfd_section (abfd
, s
);
1197 link
= elf_elfsections (abfd
)[elfsec
]->sh_link
;
1199 extdynsize
= get_elf_backend_data (abfd
)->s
->sizeof_dyn
;
1200 swap_dyn_in
= get_elf_backend_data (abfd
)->s
->swap_dyn_in
;
1203 extdynend
= extdyn
+ s
->_raw_size
;
1204 for (; extdyn
< extdynend
; extdyn
+= extdynsize
)
1206 Elf_Internal_Dyn dyn
;
1208 (*swap_dyn_in
) (abfd
, (PTR
) extdyn
, &dyn
);
1210 if (dyn
.d_tag
== DT_NULL
)
1213 if (dyn
.d_tag
== DT_NEEDED
)
1216 struct bfd_link_needed_list
*l
;
1218 string
= bfd_elf_string_from_elf_section (abfd
, link
,
1223 l
= (struct bfd_link_needed_list
*) bfd_alloc (abfd
, sizeof *l
);
1244 /* Allocate an ELF string table--force the first byte to be zero. */
1246 struct bfd_strtab_hash
*
1247 _bfd_elf_stringtab_init ()
1249 struct bfd_strtab_hash
*ret
;
1251 ret
= _bfd_stringtab_init ();
1256 loc
= _bfd_stringtab_add (ret
, "", true, false);
1257 BFD_ASSERT (loc
== 0 || loc
== (bfd_size_type
) -1);
1258 if (loc
== (bfd_size_type
) -1)
1260 _bfd_stringtab_free (ret
);
1267 /* ELF .o/exec file reading */
1269 /* Create a new bfd section from an ELF section header. */
1272 bfd_section_from_shdr (abfd
, shindex
)
1274 unsigned int shindex
;
1276 Elf_Internal_Shdr
*hdr
= elf_elfsections (abfd
)[shindex
];
1277 Elf_Internal_Ehdr
*ehdr
= elf_elfheader (abfd
);
1278 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
1281 name
= elf_string_from_elf_strtab (abfd
, hdr
->sh_name
);
1283 switch (hdr
->sh_type
)
1286 /* Inactive section. Throw it away. */
1289 case SHT_PROGBITS
: /* Normal section with contents. */
1290 case SHT_DYNAMIC
: /* Dynamic linking information. */
1291 case SHT_NOBITS
: /* .bss section. */
1292 case SHT_HASH
: /* .hash section. */
1293 case SHT_NOTE
: /* .note section. */
1294 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1296 case SHT_SYMTAB
: /* A symbol table */
1297 if (elf_onesymtab (abfd
) == shindex
)
1300 BFD_ASSERT (hdr
->sh_entsize
== bed
->s
->sizeof_sym
);
1301 BFD_ASSERT (elf_onesymtab (abfd
) == 0);
1302 elf_onesymtab (abfd
) = shindex
;
1303 elf_tdata (abfd
)->symtab_hdr
= *hdr
;
1304 elf_elfsections (abfd
)[shindex
] = hdr
= &elf_tdata (abfd
)->symtab_hdr
;
1305 abfd
->flags
|= HAS_SYMS
;
1307 /* Sometimes a shared object will map in the symbol table. If
1308 SHF_ALLOC is set, and this is a shared object, then we also
1309 treat this section as a BFD section. We can not base the
1310 decision purely on SHF_ALLOC, because that flag is sometimes
1311 set in a relocateable object file, which would confuse the
1313 if ((hdr
->sh_flags
& SHF_ALLOC
) != 0
1314 && (abfd
->flags
& DYNAMIC
) != 0
1315 && ! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
))
1320 case SHT_DYNSYM
: /* A dynamic symbol table */
1321 if (elf_dynsymtab (abfd
) == shindex
)
1324 BFD_ASSERT (hdr
->sh_entsize
== bed
->s
->sizeof_sym
);
1325 BFD_ASSERT (elf_dynsymtab (abfd
) == 0);
1326 elf_dynsymtab (abfd
) = shindex
;
1327 elf_tdata (abfd
)->dynsymtab_hdr
= *hdr
;
1328 elf_elfsections (abfd
)[shindex
] = hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
1329 abfd
->flags
|= HAS_SYMS
;
1331 /* Besides being a symbol table, we also treat this as a regular
1332 section, so that objcopy can handle it. */
1333 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1335 case SHT_STRTAB
: /* A string table */
1336 if (hdr
->bfd_section
!= NULL
)
1338 if (ehdr
->e_shstrndx
== shindex
)
1340 elf_tdata (abfd
)->shstrtab_hdr
= *hdr
;
1341 elf_elfsections (abfd
)[shindex
] = &elf_tdata (abfd
)->shstrtab_hdr
;
1347 for (i
= 1; i
< ehdr
->e_shnum
; i
++)
1349 Elf_Internal_Shdr
*hdr2
= elf_elfsections (abfd
)[i
];
1350 if (hdr2
->sh_link
== shindex
)
1352 if (! bfd_section_from_shdr (abfd
, i
))
1354 if (elf_onesymtab (abfd
) == i
)
1356 elf_tdata (abfd
)->strtab_hdr
= *hdr
;
1357 elf_elfsections (abfd
)[shindex
] =
1358 &elf_tdata (abfd
)->strtab_hdr
;
1361 if (elf_dynsymtab (abfd
) == i
)
1363 elf_tdata (abfd
)->dynstrtab_hdr
= *hdr
;
1364 elf_elfsections (abfd
)[shindex
] = hdr
=
1365 &elf_tdata (abfd
)->dynstrtab_hdr
;
1366 /* We also treat this as a regular section, so
1367 that objcopy can handle it. */
1370 #if 0 /* Not handling other string tables specially right now. */
1371 hdr2
= elf_elfsections (abfd
)[i
]; /* in case it moved */
1372 /* We have a strtab for some random other section. */
1373 newsect
= (asection
*) hdr2
->bfd_section
;
1376 hdr
->bfd_section
= newsect
;
1377 hdr2
= &elf_section_data (newsect
)->str_hdr
;
1379 elf_elfsections (abfd
)[shindex
] = hdr2
;
1385 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1389 /* *These* do a lot of work -- but build no sections! */
1391 asection
*target_sect
;
1392 Elf_Internal_Shdr
*hdr2
;
1394 /* Check for a bogus link to avoid crashing. */
1395 if (hdr
->sh_link
>= ehdr
->e_shnum
)
1397 ((*_bfd_error_handler
)
1398 (_("%s: invalid link %lu for reloc section %s (index %u)"),
1399 bfd_get_filename (abfd
), hdr
->sh_link
, name
, shindex
));
1400 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1403 /* For some incomprehensible reason Oracle distributes
1404 libraries for Solaris in which some of the objects have
1405 bogus sh_link fields. It would be nice if we could just
1406 reject them, but, unfortunately, some people need to use
1407 them. We scan through the section headers; if we find only
1408 one suitable symbol table, we clobber the sh_link to point
1409 to it. I hope this doesn't break anything. */
1410 if (elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_SYMTAB
1411 && elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_DYNSYM
)
1417 for (scan
= 1; scan
< ehdr
->e_shnum
; scan
++)
1419 if (elf_elfsections (abfd
)[scan
]->sh_type
== SHT_SYMTAB
1420 || elf_elfsections (abfd
)[scan
]->sh_type
== SHT_DYNSYM
)
1431 hdr
->sh_link
= found
;
1434 /* Get the symbol table. */
1435 if (elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
== SHT_SYMTAB
1436 && ! bfd_section_from_shdr (abfd
, hdr
->sh_link
))
1439 /* If this reloc section does not use the main symbol table we
1440 don't treat it as a reloc section. BFD can't adequately
1441 represent such a section, so at least for now, we don't
1442 try. We just present it as a normal section. We also
1443 can't use it as a reloc section if it points to the null
1445 if (hdr
->sh_link
!= elf_onesymtab (abfd
) || hdr
->sh_info
== SHN_UNDEF
)
1446 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1448 if (! bfd_section_from_shdr (abfd
, hdr
->sh_info
))
1450 target_sect
= bfd_section_from_elf_index (abfd
, hdr
->sh_info
);
1451 if (target_sect
== NULL
)
1454 if ((target_sect
->flags
& SEC_RELOC
) == 0
1455 || target_sect
->reloc_count
== 0)
1456 hdr2
= &elf_section_data (target_sect
)->rel_hdr
;
1459 BFD_ASSERT (elf_section_data (target_sect
)->rel_hdr2
== NULL
);
1460 hdr2
= (Elf_Internal_Shdr
*) bfd_alloc (abfd
, sizeof (*hdr2
));
1461 elf_section_data (target_sect
)->rel_hdr2
= hdr2
;
1464 elf_elfsections (abfd
)[shindex
] = hdr2
;
1465 target_sect
->reloc_count
+= NUM_SHDR_ENTRIES (hdr
);
1466 target_sect
->flags
|= SEC_RELOC
;
1467 target_sect
->relocation
= NULL
;
1468 target_sect
->rel_filepos
= hdr
->sh_offset
;
1469 /* In the section to which the relocations apply, mark whether
1470 its relocations are of the REL or RELA variety. */
1471 if (hdr
->sh_size
!= 0)
1472 elf_section_data (target_sect
)->use_rela_p
1473 = (hdr
->sh_type
== SHT_RELA
);
1474 abfd
->flags
|= HAS_RELOC
;
1479 case SHT_GNU_verdef
:
1480 elf_dynverdef (abfd
) = shindex
;
1481 elf_tdata (abfd
)->dynverdef_hdr
= *hdr
;
1482 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1485 case SHT_GNU_versym
:
1486 elf_dynversym (abfd
) = shindex
;
1487 elf_tdata (abfd
)->dynversym_hdr
= *hdr
;
1488 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1491 case SHT_GNU_verneed
:
1492 elf_dynverref (abfd
) = shindex
;
1493 elf_tdata (abfd
)->dynverref_hdr
= *hdr
;
1494 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1501 /* Check for any processor-specific section types. */
1503 if (bed
->elf_backend_section_from_shdr
)
1504 (*bed
->elf_backend_section_from_shdr
) (abfd
, hdr
, name
);
1512 /* Given an ELF section number, retrieve the corresponding BFD
1516 bfd_section_from_elf_index (abfd
, index
)
1520 BFD_ASSERT (index
> 0 && index
< SHN_LORESERVE
);
1521 if (index
>= elf_elfheader (abfd
)->e_shnum
)
1523 return elf_elfsections (abfd
)[index
]->bfd_section
;
1527 _bfd_elf_new_section_hook (abfd
, sec
)
1531 struct bfd_elf_section_data
*sdata
;
1533 sdata
= (struct bfd_elf_section_data
*) bfd_zalloc (abfd
, sizeof (*sdata
));
1536 sec
->used_by_bfd
= (PTR
) sdata
;
1538 /* Indicate whether or not this section should use RELA relocations. */
1540 = get_elf_backend_data (abfd
)->default_use_rela_p
;
1545 /* Create a new bfd section from an ELF program header.
1547 Since program segments have no names, we generate a synthetic name
1548 of the form segment<NUM>, where NUM is generally the index in the
1549 program header table. For segments that are split (see below) we
1550 generate the names segment<NUM>a and segment<NUM>b.
1552 Note that some program segments may have a file size that is different than
1553 (less than) the memory size. All this means is that at execution the
1554 system must allocate the amount of memory specified by the memory size,
1555 but only initialize it with the first "file size" bytes read from the
1556 file. This would occur for example, with program segments consisting
1557 of combined data+bss.
1559 To handle the above situation, this routine generates TWO bfd sections
1560 for the single program segment. The first has the length specified by
1561 the file size of the segment, and the second has the length specified
1562 by the difference between the two sizes. In effect, the segment is split
1563 into it's initialized and uninitialized parts.
1568 _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, typename
)
1570 Elf_Internal_Phdr
*hdr
;
1572 const char *typename
;
1579 split
= ((hdr
->p_memsz
> 0)
1580 && (hdr
->p_filesz
> 0)
1581 && (hdr
->p_memsz
> hdr
->p_filesz
));
1582 sprintf (namebuf
, "%s%d%s", typename
, index
, split
? "a" : "");
1583 name
= bfd_alloc (abfd
, strlen (namebuf
) + 1);
1586 strcpy (name
, namebuf
);
1587 newsect
= bfd_make_section (abfd
, name
);
1588 if (newsect
== NULL
)
1590 newsect
->vma
= hdr
->p_vaddr
;
1591 newsect
->lma
= hdr
->p_paddr
;
1592 newsect
->_raw_size
= hdr
->p_filesz
;
1593 newsect
->filepos
= hdr
->p_offset
;
1594 newsect
->flags
|= SEC_HAS_CONTENTS
;
1595 if (hdr
->p_type
== PT_LOAD
)
1597 newsect
->flags
|= SEC_ALLOC
;
1598 newsect
->flags
|= SEC_LOAD
;
1599 if (hdr
->p_flags
& PF_X
)
1601 /* FIXME: all we known is that it has execute PERMISSION,
1603 newsect
->flags
|= SEC_CODE
;
1606 if (!(hdr
->p_flags
& PF_W
))
1608 newsect
->flags
|= SEC_READONLY
;
1613 sprintf (namebuf
, "%s%db", typename
, index
);
1614 name
= bfd_alloc (abfd
, strlen (namebuf
) + 1);
1617 strcpy (name
, namebuf
);
1618 newsect
= bfd_make_section (abfd
, name
);
1619 if (newsect
== NULL
)
1621 newsect
->vma
= hdr
->p_vaddr
+ hdr
->p_filesz
;
1622 newsect
->lma
= hdr
->p_paddr
+ hdr
->p_filesz
;
1623 newsect
->_raw_size
= hdr
->p_memsz
- hdr
->p_filesz
;
1624 if (hdr
->p_type
== PT_LOAD
)
1626 newsect
->flags
|= SEC_ALLOC
;
1627 if (hdr
->p_flags
& PF_X
)
1628 newsect
->flags
|= SEC_CODE
;
1630 if (!(hdr
->p_flags
& PF_W
))
1631 newsect
->flags
|= SEC_READONLY
;
1638 bfd_section_from_phdr (abfd
, hdr
, index
)
1640 Elf_Internal_Phdr
*hdr
;
1643 struct elf_backend_data
*bed
;
1645 switch (hdr
->p_type
)
1648 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "null");
1651 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "load");
1654 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "dynamic");
1657 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "interp");
1660 if (! _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "note"))
1662 if (! elfcore_read_notes (abfd
, hdr
->p_offset
, hdr
->p_filesz
))
1667 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "shlib");
1670 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "phdr");
1673 /* Check for any processor-specific program segment types.
1674 If no handler for them, default to making "segment" sections. */
1675 bed
= get_elf_backend_data (abfd
);
1676 if (bed
->elf_backend_section_from_phdr
)
1677 return (*bed
->elf_backend_section_from_phdr
) (abfd
, hdr
, index
);
1679 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "segment");
1683 /* Initialize REL_HDR, the section-header for new section, containing
1684 relocations against ASECT. If USE_RELA_P is true, we use RELA
1685 relocations; otherwise, we use REL relocations. */
1688 _bfd_elf_init_reloc_shdr (abfd
, rel_hdr
, asect
, use_rela_p
)
1690 Elf_Internal_Shdr
*rel_hdr
;
1695 struct elf_backend_data
*bed
;
1697 bed
= get_elf_backend_data (abfd
);
1698 name
= bfd_alloc (abfd
, sizeof ".rela" + strlen (asect
->name
));
1701 sprintf (name
, "%s%s", use_rela_p
? ".rela" : ".rel", asect
->name
);
1703 (unsigned int) _bfd_stringtab_add (elf_shstrtab (abfd
), name
,
1705 if (rel_hdr
->sh_name
== (unsigned int) -1)
1707 rel_hdr
->sh_type
= use_rela_p
? SHT_RELA
: SHT_REL
;
1708 rel_hdr
->sh_entsize
= (use_rela_p
1709 ? bed
->s
->sizeof_rela
1710 : bed
->s
->sizeof_rel
);
1711 rel_hdr
->sh_addralign
= bed
->s
->file_align
;
1712 rel_hdr
->sh_flags
= 0;
1713 rel_hdr
->sh_addr
= 0;
1714 rel_hdr
->sh_size
= 0;
1715 rel_hdr
->sh_offset
= 0;
1720 /* Set up an ELF internal section header for a section. */
1723 elf_fake_sections (abfd
, asect
, failedptrarg
)
1728 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
1729 boolean
*failedptr
= (boolean
*) failedptrarg
;
1730 Elf_Internal_Shdr
*this_hdr
;
1734 /* We already failed; just get out of the bfd_map_over_sections
1739 this_hdr
= &elf_section_data (asect
)->this_hdr
;
1741 this_hdr
->sh_name
= (unsigned long) _bfd_stringtab_add (elf_shstrtab (abfd
),
1744 if (this_hdr
->sh_name
== (unsigned long) -1)
1750 this_hdr
->sh_flags
= 0;
1752 if ((asect
->flags
& SEC_ALLOC
) != 0
1753 || asect
->user_set_vma
)
1754 this_hdr
->sh_addr
= asect
->vma
;
1756 this_hdr
->sh_addr
= 0;
1758 this_hdr
->sh_offset
= 0;
1759 this_hdr
->sh_size
= asect
->_raw_size
;
1760 this_hdr
->sh_link
= 0;
1761 this_hdr
->sh_addralign
= 1 << asect
->alignment_power
;
1762 /* The sh_entsize and sh_info fields may have been set already by
1763 copy_private_section_data. */
1765 this_hdr
->bfd_section
= asect
;
1766 this_hdr
->contents
= NULL
;
1768 /* FIXME: This should not be based on section names. */
1769 if (strcmp (asect
->name
, ".dynstr") == 0)
1770 this_hdr
->sh_type
= SHT_STRTAB
;
1771 else if (strcmp (asect
->name
, ".hash") == 0)
1773 this_hdr
->sh_type
= SHT_HASH
;
1774 this_hdr
->sh_entsize
= bed
->s
->sizeof_hash_entry
;
1776 else if (strcmp (asect
->name
, ".dynsym") == 0)
1778 this_hdr
->sh_type
= SHT_DYNSYM
;
1779 this_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
1781 else if (strcmp (asect
->name
, ".dynamic") == 0)
1783 this_hdr
->sh_type
= SHT_DYNAMIC
;
1784 this_hdr
->sh_entsize
= bed
->s
->sizeof_dyn
;
1786 else if (strncmp (asect
->name
, ".rela", 5) == 0
1787 && get_elf_backend_data (abfd
)->may_use_rela_p
)
1789 this_hdr
->sh_type
= SHT_RELA
;
1790 this_hdr
->sh_entsize
= bed
->s
->sizeof_rela
;
1792 else if (strncmp (asect
->name
, ".rel", 4) == 0
1793 && get_elf_backend_data (abfd
)->may_use_rel_p
)
1795 this_hdr
->sh_type
= SHT_REL
;
1796 this_hdr
->sh_entsize
= bed
->s
->sizeof_rel
;
1798 else if (strncmp (asect
->name
, ".note", 5) == 0)
1799 this_hdr
->sh_type
= SHT_NOTE
;
1800 else if (strncmp (asect
->name
, ".stab", 5) == 0
1801 && strcmp (asect
->name
+ strlen (asect
->name
) - 3, "str") == 0)
1802 this_hdr
->sh_type
= SHT_STRTAB
;
1803 else if (strcmp (asect
->name
, ".gnu.version") == 0)
1805 this_hdr
->sh_type
= SHT_GNU_versym
;
1806 this_hdr
->sh_entsize
= sizeof (Elf_External_Versym
);
1808 else if (strcmp (asect
->name
, ".gnu.version_d") == 0)
1810 this_hdr
->sh_type
= SHT_GNU_verdef
;
1811 this_hdr
->sh_entsize
= 0;
1812 /* objcopy or strip will copy over sh_info, but may not set
1813 cverdefs. The linker will set cverdefs, but sh_info will be
1815 if (this_hdr
->sh_info
== 0)
1816 this_hdr
->sh_info
= elf_tdata (abfd
)->cverdefs
;
1818 BFD_ASSERT (elf_tdata (abfd
)->cverdefs
== 0
1819 || this_hdr
->sh_info
== elf_tdata (abfd
)->cverdefs
);
1821 else if (strcmp (asect
->name
, ".gnu.version_r") == 0)
1823 this_hdr
->sh_type
= SHT_GNU_verneed
;
1824 this_hdr
->sh_entsize
= 0;
1825 /* objcopy or strip will copy over sh_info, but may not set
1826 cverrefs. The linker will set cverrefs, but sh_info will be
1828 if (this_hdr
->sh_info
== 0)
1829 this_hdr
->sh_info
= elf_tdata (abfd
)->cverrefs
;
1831 BFD_ASSERT (elf_tdata (abfd
)->cverrefs
== 0
1832 || this_hdr
->sh_info
== elf_tdata (abfd
)->cverrefs
);
1834 else if ((asect
->flags
& SEC_ALLOC
) != 0
1835 && ((asect
->flags
& (SEC_LOAD
| SEC_HAS_CONTENTS
)) == 0))
1836 this_hdr
->sh_type
= SHT_NOBITS
;
1838 this_hdr
->sh_type
= SHT_PROGBITS
;
1840 if ((asect
->flags
& SEC_ALLOC
) != 0)
1841 this_hdr
->sh_flags
|= SHF_ALLOC
;
1842 if ((asect
->flags
& SEC_READONLY
) == 0)
1843 this_hdr
->sh_flags
|= SHF_WRITE
;
1844 if ((asect
->flags
& SEC_CODE
) != 0)
1845 this_hdr
->sh_flags
|= SHF_EXECINSTR
;
1846 if ((asect
->flags
& SEC_MERGE
) != 0)
1848 this_hdr
->sh_flags
|= SHF_MERGE
;
1849 this_hdr
->sh_entsize
= asect
->entsize
;
1850 if ((asect
->flags
& SEC_STRINGS
) != 0)
1851 this_hdr
->sh_flags
|= SHF_STRINGS
;
1854 /* Check for processor-specific section types. */
1855 if (bed
->elf_backend_fake_sections
)
1856 (*bed
->elf_backend_fake_sections
) (abfd
, this_hdr
, asect
);
1858 /* If the section has relocs, set up a section header for the
1859 SHT_REL[A] section. If two relocation sections are required for
1860 this section, it is up to the processor-specific back-end to
1861 create the other. */
1862 if ((asect
->flags
& SEC_RELOC
) != 0
1863 && !_bfd_elf_init_reloc_shdr (abfd
,
1864 &elf_section_data (asect
)->rel_hdr
,
1866 elf_section_data (asect
)->use_rela_p
))
1870 /* Assign all ELF section numbers. The dummy first section is handled here
1871 too. The link/info pointers for the standard section types are filled
1872 in here too, while we're at it. */
1875 assign_section_numbers (abfd
)
1878 struct elf_obj_tdata
*t
= elf_tdata (abfd
);
1880 unsigned int section_number
;
1881 Elf_Internal_Shdr
**i_shdrp
;
1885 for (sec
= abfd
->sections
; sec
; sec
= sec
->next
)
1887 struct bfd_elf_section_data
*d
= elf_section_data (sec
);
1889 d
->this_idx
= section_number
++;
1890 if ((sec
->flags
& SEC_RELOC
) == 0)
1893 d
->rel_idx
= section_number
++;
1896 d
->rel_idx2
= section_number
++;
1901 t
->shstrtab_section
= section_number
++;
1902 elf_elfheader (abfd
)->e_shstrndx
= t
->shstrtab_section
;
1903 t
->shstrtab_hdr
.sh_size
= _bfd_stringtab_size (elf_shstrtab (abfd
));
1905 if (bfd_get_symcount (abfd
) > 0)
1907 t
->symtab_section
= section_number
++;
1908 t
->strtab_section
= section_number
++;
1911 elf_elfheader (abfd
)->e_shnum
= section_number
;
1913 /* Set up the list of section header pointers, in agreement with the
1915 i_shdrp
= ((Elf_Internal_Shdr
**)
1916 bfd_alloc (abfd
, section_number
* sizeof (Elf_Internal_Shdr
*)));
1917 if (i_shdrp
== NULL
)
1920 i_shdrp
[0] = ((Elf_Internal_Shdr
*)
1921 bfd_alloc (abfd
, sizeof (Elf_Internal_Shdr
)));
1922 if (i_shdrp
[0] == NULL
)
1924 bfd_release (abfd
, i_shdrp
);
1927 memset (i_shdrp
[0], 0, sizeof (Elf_Internal_Shdr
));
1929 elf_elfsections (abfd
) = i_shdrp
;
1931 i_shdrp
[t
->shstrtab_section
] = &t
->shstrtab_hdr
;
1932 if (bfd_get_symcount (abfd
) > 0)
1934 i_shdrp
[t
->symtab_section
] = &t
->symtab_hdr
;
1935 i_shdrp
[t
->strtab_section
] = &t
->strtab_hdr
;
1936 t
->symtab_hdr
.sh_link
= t
->strtab_section
;
1938 for (sec
= abfd
->sections
; sec
; sec
= sec
->next
)
1940 struct bfd_elf_section_data
*d
= elf_section_data (sec
);
1944 i_shdrp
[d
->this_idx
] = &d
->this_hdr
;
1945 if (d
->rel_idx
!= 0)
1946 i_shdrp
[d
->rel_idx
] = &d
->rel_hdr
;
1947 if (d
->rel_idx2
!= 0)
1948 i_shdrp
[d
->rel_idx2
] = d
->rel_hdr2
;
1950 /* Fill in the sh_link and sh_info fields while we're at it. */
1952 /* sh_link of a reloc section is the section index of the symbol
1953 table. sh_info is the section index of the section to which
1954 the relocation entries apply. */
1955 if (d
->rel_idx
!= 0)
1957 d
->rel_hdr
.sh_link
= t
->symtab_section
;
1958 d
->rel_hdr
.sh_info
= d
->this_idx
;
1960 if (d
->rel_idx2
!= 0)
1962 d
->rel_hdr2
->sh_link
= t
->symtab_section
;
1963 d
->rel_hdr2
->sh_info
= d
->this_idx
;
1966 switch (d
->this_hdr
.sh_type
)
1970 /* A reloc section which we are treating as a normal BFD
1971 section. sh_link is the section index of the symbol
1972 table. sh_info is the section index of the section to
1973 which the relocation entries apply. We assume that an
1974 allocated reloc section uses the dynamic symbol table.
1975 FIXME: How can we be sure? */
1976 s
= bfd_get_section_by_name (abfd
, ".dynsym");
1978 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
1980 /* We look up the section the relocs apply to by name. */
1982 if (d
->this_hdr
.sh_type
== SHT_REL
)
1986 s
= bfd_get_section_by_name (abfd
, name
);
1988 d
->this_hdr
.sh_info
= elf_section_data (s
)->this_idx
;
1992 /* We assume that a section named .stab*str is a stabs
1993 string section. We look for a section with the same name
1994 but without the trailing ``str'', and set its sh_link
1995 field to point to this section. */
1996 if (strncmp (sec
->name
, ".stab", sizeof ".stab" - 1) == 0
1997 && strcmp (sec
->name
+ strlen (sec
->name
) - 3, "str") == 0)
2002 len
= strlen (sec
->name
);
2003 alc
= (char *) bfd_malloc (len
- 2);
2006 strncpy (alc
, sec
->name
, len
- 3);
2007 alc
[len
- 3] = '\0';
2008 s
= bfd_get_section_by_name (abfd
, alc
);
2012 elf_section_data (s
)->this_hdr
.sh_link
= d
->this_idx
;
2014 /* This is a .stab section. */
2015 elf_section_data (s
)->this_hdr
.sh_entsize
=
2016 4 + 2 * bfd_get_arch_size (abfd
) / 8;
2023 case SHT_GNU_verneed
:
2024 case SHT_GNU_verdef
:
2025 /* sh_link is the section header index of the string table
2026 used for the dynamic entries, or the symbol table, or the
2028 s
= bfd_get_section_by_name (abfd
, ".dynstr");
2030 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
2034 case SHT_GNU_versym
:
2035 /* sh_link is the section header index of the symbol table
2036 this hash table or version table is for. */
2037 s
= bfd_get_section_by_name (abfd
, ".dynsym");
2039 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
2047 /* Map symbol from it's internal number to the external number, moving
2048 all local symbols to be at the head of the list. */
2051 sym_is_global (abfd
, sym
)
2055 /* If the backend has a special mapping, use it. */
2056 if (get_elf_backend_data (abfd
)->elf_backend_sym_is_global
)
2057 return ((*get_elf_backend_data (abfd
)->elf_backend_sym_is_global
)
2060 return ((sym
->flags
& (BSF_GLOBAL
| BSF_WEAK
)) != 0
2061 || bfd_is_und_section (bfd_get_section (sym
))
2062 || bfd_is_com_section (bfd_get_section (sym
)));
2066 elf_map_symbols (abfd
)
2069 int symcount
= bfd_get_symcount (abfd
);
2070 asymbol
**syms
= bfd_get_outsymbols (abfd
);
2071 asymbol
**sect_syms
;
2073 int num_globals
= 0;
2074 int num_locals2
= 0;
2075 int num_globals2
= 0;
2077 int num_sections
= 0;
2084 fprintf (stderr
, "elf_map_symbols\n");
2088 /* Add a section symbol for each BFD section. FIXME: Is this really
2090 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
2092 if (max_index
< asect
->index
)
2093 max_index
= asect
->index
;
2097 sect_syms
= (asymbol
**) bfd_zalloc (abfd
, max_index
* sizeof (asymbol
*));
2098 if (sect_syms
== NULL
)
2100 elf_section_syms (abfd
) = sect_syms
;
2101 elf_num_section_syms (abfd
) = max_index
;
2103 for (idx
= 0; idx
< symcount
; idx
++)
2107 if ((sym
->flags
& BSF_SECTION_SYM
) != 0
2114 if (sec
->owner
!= NULL
)
2116 if (sec
->owner
!= abfd
)
2118 if (sec
->output_offset
!= 0)
2121 sec
= sec
->output_section
;
2123 /* Empty sections in the input files may have had a section
2124 symbol created for them. (See the comment near the end of
2125 _bfd_generic_link_output_symbols in linker.c). If the linker
2126 script discards such sections then we will reach this point.
2127 Since we know that we cannot avoid this case, we detect it
2128 and skip the abort and the assignment to the sect_syms array.
2129 To reproduce this particular case try running the linker
2130 testsuite test ld-scripts/weak.exp for an ELF port that uses
2131 the generic linker. */
2132 if (sec
->owner
== NULL
)
2135 BFD_ASSERT (sec
->owner
== abfd
);
2137 sect_syms
[sec
->index
] = syms
[idx
];
2142 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
2144 if (sect_syms
[asect
->index
] != NULL
)
2147 sym
= bfd_make_empty_symbol (abfd
);
2150 sym
->the_bfd
= abfd
;
2151 sym
->name
= asect
->name
;
2153 /* Set the flags to 0 to indicate that this one was newly added. */
2155 sym
->section
= asect
;
2156 sect_syms
[asect
->index
] = sym
;
2160 _("creating section symbol, name = %s, value = 0x%.8lx, index = %d, section = 0x%.8lx\n"),
2161 asect
->name
, (long) asect
->vma
, asect
->index
, (long) asect
);
2165 /* Classify all of the symbols. */
2166 for (idx
= 0; idx
< symcount
; idx
++)
2168 if (!sym_is_global (abfd
, syms
[idx
]))
2173 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
2175 if (sect_syms
[asect
->index
] != NULL
2176 && sect_syms
[asect
->index
]->flags
== 0)
2178 sect_syms
[asect
->index
]->flags
= BSF_SECTION_SYM
;
2179 if (!sym_is_global (abfd
, sect_syms
[asect
->index
]))
2183 sect_syms
[asect
->index
]->flags
= 0;
2187 /* Now sort the symbols so the local symbols are first. */
2188 new_syms
= ((asymbol
**)
2190 (num_locals
+ num_globals
) * sizeof (asymbol
*)));
2191 if (new_syms
== NULL
)
2194 for (idx
= 0; idx
< symcount
; idx
++)
2196 asymbol
*sym
= syms
[idx
];
2199 if (!sym_is_global (abfd
, sym
))
2202 i
= num_locals
+ num_globals2
++;
2204 sym
->udata
.i
= i
+ 1;
2206 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
2208 if (sect_syms
[asect
->index
] != NULL
2209 && sect_syms
[asect
->index
]->flags
== 0)
2211 asymbol
*sym
= sect_syms
[asect
->index
];
2214 sym
->flags
= BSF_SECTION_SYM
;
2215 if (!sym_is_global (abfd
, sym
))
2218 i
= num_locals
+ num_globals2
++;
2220 sym
->udata
.i
= i
+ 1;
2224 bfd_set_symtab (abfd
, new_syms
, num_locals
+ num_globals
);
2226 elf_num_locals (abfd
) = num_locals
;
2227 elf_num_globals (abfd
) = num_globals
;
2231 /* Align to the maximum file alignment that could be required for any
2232 ELF data structure. */
2234 static INLINE file_ptr align_file_position
PARAMS ((file_ptr
, int));
2235 static INLINE file_ptr
2236 align_file_position (off
, align
)
2240 return (off
+ align
- 1) & ~(align
- 1);
2243 /* Assign a file position to a section, optionally aligning to the
2244 required section alignment. */
2247 _bfd_elf_assign_file_position_for_section (i_shdrp
, offset
, align
)
2248 Elf_Internal_Shdr
*i_shdrp
;
2256 al
= i_shdrp
->sh_addralign
;
2258 offset
= BFD_ALIGN (offset
, al
);
2260 i_shdrp
->sh_offset
= offset
;
2261 if (i_shdrp
->bfd_section
!= NULL
)
2262 i_shdrp
->bfd_section
->filepos
= offset
;
2263 if (i_shdrp
->sh_type
!= SHT_NOBITS
)
2264 offset
+= i_shdrp
->sh_size
;
2268 /* Compute the file positions we are going to put the sections at, and
2269 otherwise prepare to begin writing out the ELF file. If LINK_INFO
2270 is not NULL, this is being called by the ELF backend linker. */
2273 _bfd_elf_compute_section_file_positions (abfd
, link_info
)
2275 struct bfd_link_info
*link_info
;
2277 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2279 struct bfd_strtab_hash
*strtab
;
2280 Elf_Internal_Shdr
*shstrtab_hdr
;
2282 if (abfd
->output_has_begun
)
2285 /* Do any elf backend specific processing first. */
2286 if (bed
->elf_backend_begin_write_processing
)
2287 (*bed
->elf_backend_begin_write_processing
) (abfd
, link_info
);
2289 if (! prep_headers (abfd
))
2292 /* Post process the headers if necessary. */
2293 if (bed
->elf_backend_post_process_headers
)
2294 (*bed
->elf_backend_post_process_headers
) (abfd
, link_info
);
2297 bfd_map_over_sections (abfd
, elf_fake_sections
, &failed
);
2301 if (!assign_section_numbers (abfd
))
2304 /* The backend linker builds symbol table information itself. */
2305 if (link_info
== NULL
&& bfd_get_symcount (abfd
) > 0)
2307 /* Non-zero if doing a relocatable link. */
2308 int relocatable_p
= ! (abfd
->flags
& (EXEC_P
| DYNAMIC
));
2310 if (! swap_out_syms (abfd
, &strtab
, relocatable_p
))
2314 shstrtab_hdr
= &elf_tdata (abfd
)->shstrtab_hdr
;
2315 /* sh_name was set in prep_headers. */
2316 shstrtab_hdr
->sh_type
= SHT_STRTAB
;
2317 shstrtab_hdr
->sh_flags
= 0;
2318 shstrtab_hdr
->sh_addr
= 0;
2319 shstrtab_hdr
->sh_size
= _bfd_stringtab_size (elf_shstrtab (abfd
));
2320 shstrtab_hdr
->sh_entsize
= 0;
2321 shstrtab_hdr
->sh_link
= 0;
2322 shstrtab_hdr
->sh_info
= 0;
2323 /* sh_offset is set in assign_file_positions_except_relocs. */
2324 shstrtab_hdr
->sh_addralign
= 1;
2326 if (!assign_file_positions_except_relocs (abfd
))
2329 if (link_info
== NULL
&& bfd_get_symcount (abfd
) > 0)
2332 Elf_Internal_Shdr
*hdr
;
2334 off
= elf_tdata (abfd
)->next_file_pos
;
2336 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2337 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, true);
2339 hdr
= &elf_tdata (abfd
)->strtab_hdr
;
2340 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, true);
2342 elf_tdata (abfd
)->next_file_pos
= off
;
2344 /* Now that we know where the .strtab section goes, write it
2346 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
2347 || ! _bfd_stringtab_emit (abfd
, strtab
))
2349 _bfd_stringtab_free (strtab
);
2352 abfd
->output_has_begun
= true;
2357 /* Create a mapping from a set of sections to a program segment. */
2359 static INLINE
struct elf_segment_map
*
2360 make_mapping (abfd
, sections
, from
, to
, phdr
)
2362 asection
**sections
;
2367 struct elf_segment_map
*m
;
2371 m
= ((struct elf_segment_map
*)
2373 (sizeof (struct elf_segment_map
)
2374 + (to
- from
- 1) * sizeof (asection
*))));
2378 m
->p_type
= PT_LOAD
;
2379 for (i
= from
, hdrpp
= sections
+ from
; i
< to
; i
++, hdrpp
++)
2380 m
->sections
[i
- from
] = *hdrpp
;
2381 m
->count
= to
- from
;
2383 if (from
== 0 && phdr
)
2385 /* Include the headers in the first PT_LOAD segment. */
2386 m
->includes_filehdr
= 1;
2387 m
->includes_phdrs
= 1;
2393 /* Set up a mapping from BFD sections to program segments. */
2396 map_sections_to_segments (abfd
)
2399 asection
**sections
= NULL
;
2403 struct elf_segment_map
*mfirst
;
2404 struct elf_segment_map
**pm
;
2405 struct elf_segment_map
*m
;
2407 unsigned int phdr_index
;
2408 bfd_vma maxpagesize
;
2410 boolean phdr_in_segment
= true;
2414 if (elf_tdata (abfd
)->segment_map
!= NULL
)
2417 if (bfd_count_sections (abfd
) == 0)
2420 /* Select the allocated sections, and sort them. */
2422 sections
= (asection
**) bfd_malloc (bfd_count_sections (abfd
)
2423 * sizeof (asection
*));
2424 if (sections
== NULL
)
2428 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
2430 if ((s
->flags
& SEC_ALLOC
) != 0)
2436 BFD_ASSERT (i
<= bfd_count_sections (abfd
));
2439 qsort (sections
, (size_t) count
, sizeof (asection
*), elf_sort_sections
);
2441 /* Build the mapping. */
2446 /* If we have a .interp section, then create a PT_PHDR segment for
2447 the program headers and a PT_INTERP segment for the .interp
2449 s
= bfd_get_section_by_name (abfd
, ".interp");
2450 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0)
2452 m
= ((struct elf_segment_map
*)
2453 bfd_zalloc (abfd
, sizeof (struct elf_segment_map
)));
2457 m
->p_type
= PT_PHDR
;
2458 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
2459 m
->p_flags
= PF_R
| PF_X
;
2460 m
->p_flags_valid
= 1;
2461 m
->includes_phdrs
= 1;
2466 m
= ((struct elf_segment_map
*)
2467 bfd_zalloc (abfd
, sizeof (struct elf_segment_map
)));
2471 m
->p_type
= PT_INTERP
;
2479 /* Look through the sections. We put sections in the same program
2480 segment when the start of the second section can be placed within
2481 a few bytes of the end of the first section. */
2484 maxpagesize
= get_elf_backend_data (abfd
)->maxpagesize
;
2486 dynsec
= bfd_get_section_by_name (abfd
, ".dynamic");
2488 && (dynsec
->flags
& SEC_LOAD
) == 0)
2491 /* Deal with -Ttext or something similar such that the first section
2492 is not adjacent to the program headers. This is an
2493 approximation, since at this point we don't know exactly how many
2494 program headers we will need. */
2497 bfd_size_type phdr_size
;
2499 phdr_size
= elf_tdata (abfd
)->program_header_size
;
2501 phdr_size
= get_elf_backend_data (abfd
)->s
->sizeof_phdr
;
2502 if ((abfd
->flags
& D_PAGED
) == 0
2503 || sections
[0]->lma
< phdr_size
2504 || sections
[0]->lma
% maxpagesize
< phdr_size
% maxpagesize
)
2505 phdr_in_segment
= false;
2508 for (i
= 0, hdrpp
= sections
; i
< count
; i
++, hdrpp
++)
2511 boolean new_segment
;
2515 /* See if this section and the last one will fit in the same
2518 if (last_hdr
== NULL
)
2520 /* If we don't have a segment yet, then we don't need a new
2521 one (we build the last one after this loop). */
2522 new_segment
= false;
2524 else if (last_hdr
->lma
- last_hdr
->vma
!= hdr
->lma
- hdr
->vma
)
2526 /* If this section has a different relation between the
2527 virtual address and the load address, then we need a new
2531 else if (BFD_ALIGN (last_hdr
->lma
+ last_hdr
->_raw_size
, maxpagesize
)
2532 < BFD_ALIGN (hdr
->lma
, maxpagesize
))
2534 /* If putting this section in this segment would force us to
2535 skip a page in the segment, then we need a new segment. */
2538 else if ((last_hdr
->flags
& SEC_LOAD
) == 0
2539 && (hdr
->flags
& SEC_LOAD
) != 0)
2541 /* We don't want to put a loadable section after a
2542 nonloadable section in the same segment. */
2545 else if ((abfd
->flags
& D_PAGED
) == 0)
2547 /* If the file is not demand paged, which means that we
2548 don't require the sections to be correctly aligned in the
2549 file, then there is no other reason for a new segment. */
2550 new_segment
= false;
2553 && (hdr
->flags
& SEC_READONLY
) == 0
2554 && (BFD_ALIGN (last_hdr
->lma
+ last_hdr
->_raw_size
, maxpagesize
)
2557 /* We don't want to put a writable section in a read only
2558 segment, unless they are on the same page in memory
2559 anyhow. We already know that the last section does not
2560 bring us past the current section on the page, so the
2561 only case in which the new section is not on the same
2562 page as the previous section is when the previous section
2563 ends precisely on a page boundary. */
2568 /* Otherwise, we can use the same segment. */
2569 new_segment
= false;
2574 if ((hdr
->flags
& SEC_READONLY
) == 0)
2580 /* We need a new program segment. We must create a new program
2581 header holding all the sections from phdr_index until hdr. */
2583 m
= make_mapping (abfd
, sections
, phdr_index
, i
, phdr_in_segment
);
2590 if ((hdr
->flags
& SEC_READONLY
) == 0)
2597 phdr_in_segment
= false;
2600 /* Create a final PT_LOAD program segment. */
2601 if (last_hdr
!= NULL
)
2603 m
= make_mapping (abfd
, sections
, phdr_index
, i
, phdr_in_segment
);
2611 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
2614 m
= ((struct elf_segment_map
*)
2615 bfd_zalloc (abfd
, sizeof (struct elf_segment_map
)));
2619 m
->p_type
= PT_DYNAMIC
;
2621 m
->sections
[0] = dynsec
;
2627 /* For each loadable .note section, add a PT_NOTE segment. We don't
2628 use bfd_get_section_by_name, because if we link together
2629 nonloadable .note sections and loadable .note sections, we will
2630 generate two .note sections in the output file. FIXME: Using
2631 names for section types is bogus anyhow. */
2632 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
2634 if ((s
->flags
& SEC_LOAD
) != 0
2635 && strncmp (s
->name
, ".note", 5) == 0)
2637 m
= ((struct elf_segment_map
*)
2638 bfd_zalloc (abfd
, sizeof (struct elf_segment_map
)));
2642 m
->p_type
= PT_NOTE
;
2654 elf_tdata (abfd
)->segment_map
= mfirst
;
2658 if (sections
!= NULL
)
2663 /* Sort sections by address. */
2666 elf_sort_sections (arg1
, arg2
)
2670 const asection
*sec1
= *(const asection
**) arg1
;
2671 const asection
*sec2
= *(const asection
**) arg2
;
2673 /* Sort by LMA first, since this is the address used to
2674 place the section into a segment. */
2675 if (sec1
->lma
< sec2
->lma
)
2677 else if (sec1
->lma
> sec2
->lma
)
2680 /* Then sort by VMA. Normally the LMA and the VMA will be
2681 the same, and this will do nothing. */
2682 if (sec1
->vma
< sec2
->vma
)
2684 else if (sec1
->vma
> sec2
->vma
)
2687 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
2689 #define TOEND(x) (((x)->flags & SEC_LOAD) == 0)
2695 /* If the indicies are the same, do not return 0
2696 here, but continue to try the next comparison. */
2697 if (sec1
->target_index
- sec2
->target_index
!= 0)
2698 return sec1
->target_index
- sec2
->target_index
;
2703 else if (TOEND (sec2
))
2708 /* Sort by size, to put zero sized sections
2709 before others at the same address. */
2711 if (sec1
->_raw_size
< sec2
->_raw_size
)
2713 if (sec1
->_raw_size
> sec2
->_raw_size
)
2716 return sec1
->target_index
- sec2
->target_index
;
2719 /* Assign file positions to the sections based on the mapping from
2720 sections to segments. This function also sets up some fields in
2721 the file header, and writes out the program headers. */
2724 assign_file_positions_for_segments (abfd
)
2727 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2729 struct elf_segment_map
*m
;
2731 Elf_Internal_Phdr
*phdrs
;
2733 bfd_vma filehdr_vaddr
, filehdr_paddr
;
2734 bfd_vma phdrs_vaddr
, phdrs_paddr
;
2735 Elf_Internal_Phdr
*p
;
2737 if (elf_tdata (abfd
)->segment_map
== NULL
)
2739 if (! map_sections_to_segments (abfd
))
2743 if (bed
->elf_backend_modify_segment_map
)
2745 if (! (*bed
->elf_backend_modify_segment_map
) (abfd
))
2750 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
2753 elf_elfheader (abfd
)->e_phoff
= bed
->s
->sizeof_ehdr
;
2754 elf_elfheader (abfd
)->e_phentsize
= bed
->s
->sizeof_phdr
;
2755 elf_elfheader (abfd
)->e_phnum
= count
;
2760 /* If we already counted the number of program segments, make sure
2761 that we allocated enough space. This happens when SIZEOF_HEADERS
2762 is used in a linker script. */
2763 alloc
= elf_tdata (abfd
)->program_header_size
/ bed
->s
->sizeof_phdr
;
2764 if (alloc
!= 0 && count
> alloc
)
2766 ((*_bfd_error_handler
)
2767 (_("%s: Not enough room for program headers (allocated %u, need %u)"),
2768 bfd_get_filename (abfd
), alloc
, count
));
2769 bfd_set_error (bfd_error_bad_value
);
2776 phdrs
= ((Elf_Internal_Phdr
*)
2777 bfd_alloc (abfd
, alloc
* sizeof (Elf_Internal_Phdr
)));
2781 off
= bed
->s
->sizeof_ehdr
;
2782 off
+= alloc
* bed
->s
->sizeof_phdr
;
2789 for (m
= elf_tdata (abfd
)->segment_map
, p
= phdrs
;
2796 /* If elf_segment_map is not from map_sections_to_segments, the
2797 sections may not be correctly ordered. */
2799 qsort (m
->sections
, (size_t) m
->count
, sizeof (asection
*),
2802 p
->p_type
= m
->p_type
;
2803 p
->p_flags
= m
->p_flags
;
2805 if (p
->p_type
== PT_LOAD
2807 && (m
->sections
[0]->flags
& SEC_ALLOC
) != 0)
2809 if ((abfd
->flags
& D_PAGED
) != 0)
2810 off
+= (m
->sections
[0]->vma
- off
) % bed
->maxpagesize
;
2813 bfd_size_type align
;
2816 for (i
= 0, secpp
= m
->sections
; i
< m
->count
; i
++, secpp
++)
2818 bfd_size_type secalign
;
2820 secalign
= bfd_get_section_alignment (abfd
, *secpp
);
2821 if (secalign
> align
)
2825 off
+= (m
->sections
[0]->vma
- off
) % (1 << align
);
2832 p
->p_vaddr
= m
->sections
[0]->vma
;
2834 if (m
->p_paddr_valid
)
2835 p
->p_paddr
= m
->p_paddr
;
2836 else if (m
->count
== 0)
2839 p
->p_paddr
= m
->sections
[0]->lma
;
2841 if (p
->p_type
== PT_LOAD
2842 && (abfd
->flags
& D_PAGED
) != 0)
2843 p
->p_align
= bed
->maxpagesize
;
2844 else if (m
->count
== 0)
2845 p
->p_align
= bed
->s
->file_align
;
2853 if (m
->includes_filehdr
)
2855 if (! m
->p_flags_valid
)
2858 p
->p_filesz
= bed
->s
->sizeof_ehdr
;
2859 p
->p_memsz
= bed
->s
->sizeof_ehdr
;
2862 BFD_ASSERT (p
->p_type
== PT_LOAD
);
2864 if (p
->p_vaddr
< (bfd_vma
) off
)
2866 _bfd_error_handler (_("%s: Not enough room for program headers, try linking with -N"),
2867 bfd_get_filename (abfd
));
2868 bfd_set_error (bfd_error_bad_value
);
2873 if (! m
->p_paddr_valid
)
2876 if (p
->p_type
== PT_LOAD
)
2878 filehdr_vaddr
= p
->p_vaddr
;
2879 filehdr_paddr
= p
->p_paddr
;
2883 if (m
->includes_phdrs
)
2885 if (! m
->p_flags_valid
)
2888 if (m
->includes_filehdr
)
2890 if (p
->p_type
== PT_LOAD
)
2892 phdrs_vaddr
= p
->p_vaddr
+ bed
->s
->sizeof_ehdr
;
2893 phdrs_paddr
= p
->p_paddr
+ bed
->s
->sizeof_ehdr
;
2898 p
->p_offset
= bed
->s
->sizeof_ehdr
;
2902 BFD_ASSERT (p
->p_type
== PT_LOAD
);
2903 p
->p_vaddr
-= off
- p
->p_offset
;
2904 if (! m
->p_paddr_valid
)
2905 p
->p_paddr
-= off
- p
->p_offset
;
2908 if (p
->p_type
== PT_LOAD
)
2910 phdrs_vaddr
= p
->p_vaddr
;
2911 phdrs_paddr
= p
->p_paddr
;
2914 phdrs_vaddr
= bed
->maxpagesize
+ bed
->s
->sizeof_ehdr
;
2917 p
->p_filesz
+= alloc
* bed
->s
->sizeof_phdr
;
2918 p
->p_memsz
+= alloc
* bed
->s
->sizeof_phdr
;
2921 if (p
->p_type
== PT_LOAD
2922 || (p
->p_type
== PT_NOTE
&& bfd_get_format (abfd
) == bfd_core
))
2924 if (! m
->includes_filehdr
&& ! m
->includes_phdrs
)
2930 adjust
= off
- (p
->p_offset
+ p
->p_filesz
);
2931 p
->p_filesz
+= adjust
;
2932 p
->p_memsz
+= adjust
;
2938 for (i
= 0, secpp
= m
->sections
; i
< m
->count
; i
++, secpp
++)
2942 bfd_size_type align
;
2946 align
= 1 << bfd_get_section_alignment (abfd
, sec
);
2948 /* The section may have artificial alignment forced by a
2949 link script. Notice this case by the gap between the
2950 cumulative phdr vma and the section's vma. */
2951 if (p
->p_vaddr
+ p
->p_memsz
< sec
->vma
)
2953 bfd_vma adjust
= sec
->vma
- (p
->p_vaddr
+ p
->p_memsz
);
2955 p
->p_memsz
+= adjust
;
2958 if ((flags
& SEC_LOAD
) != 0)
2959 p
->p_filesz
+= adjust
;
2962 if (p
->p_type
== PT_LOAD
)
2964 bfd_signed_vma adjust
;
2966 if ((flags
& SEC_LOAD
) != 0)
2968 adjust
= sec
->lma
- (p
->p_paddr
+ p
->p_memsz
);
2972 else if ((flags
& SEC_ALLOC
) != 0)
2974 /* The section VMA must equal the file position
2975 modulo the page size. FIXME: I'm not sure if
2976 this adjustment is really necessary. We used to
2977 not have the SEC_LOAD case just above, and then
2978 this was necessary, but now I'm not sure. */
2979 if ((abfd
->flags
& D_PAGED
) != 0)
2980 adjust
= (sec
->vma
- voff
) % bed
->maxpagesize
;
2982 adjust
= (sec
->vma
- voff
) % align
;
2991 (* _bfd_error_handler
)
2992 (_("Error: First section in segment (%s) starts at 0x%x"),
2993 bfd_section_name (abfd
, sec
), sec
->lma
);
2994 (* _bfd_error_handler
)
2995 (_(" whereas segment starts at 0x%x"),
3000 p
->p_memsz
+= adjust
;
3003 if ((flags
& SEC_LOAD
) != 0)
3004 p
->p_filesz
+= adjust
;
3009 /* We check SEC_HAS_CONTENTS here because if NOLOAD is
3010 used in a linker script we may have a section with
3011 SEC_LOAD clear but which is supposed to have
3013 if ((flags
& SEC_LOAD
) != 0
3014 || (flags
& SEC_HAS_CONTENTS
) != 0)
3015 off
+= sec
->_raw_size
;
3017 if ((flags
& SEC_ALLOC
) != 0)
3018 voff
+= sec
->_raw_size
;
3021 if (p
->p_type
== PT_NOTE
&& bfd_get_format (abfd
) == bfd_core
)
3023 /* The actual "note" segment has i == 0.
3024 This is the one that actually contains everything. */
3028 p
->p_filesz
= sec
->_raw_size
;
3029 off
+= sec
->_raw_size
;
3034 /* Fake sections -- don't need to be written. */
3037 flags
= sec
->flags
= 0;
3044 p
->p_memsz
+= sec
->_raw_size
;
3046 if ((flags
& SEC_LOAD
) != 0)
3047 p
->p_filesz
+= sec
->_raw_size
;
3049 if (align
> p
->p_align
3050 && (p
->p_type
!= PT_LOAD
|| (abfd
->flags
& D_PAGED
) == 0))
3054 if (! m
->p_flags_valid
)
3057 if ((flags
& SEC_CODE
) != 0)
3059 if ((flags
& SEC_READONLY
) == 0)
3065 /* Now that we have set the section file positions, we can set up
3066 the file positions for the non PT_LOAD segments. */
3067 for (m
= elf_tdata (abfd
)->segment_map
, p
= phdrs
;
3071 if (p
->p_type
!= PT_LOAD
&& m
->count
> 0)
3073 BFD_ASSERT (! m
->includes_filehdr
&& ! m
->includes_phdrs
);
3074 p
->p_offset
= m
->sections
[0]->filepos
;
3078 if (m
->includes_filehdr
)
3080 p
->p_vaddr
= filehdr_vaddr
;
3081 if (! m
->p_paddr_valid
)
3082 p
->p_paddr
= filehdr_paddr
;
3084 else if (m
->includes_phdrs
)
3086 p
->p_vaddr
= phdrs_vaddr
;
3087 if (! m
->p_paddr_valid
)
3088 p
->p_paddr
= phdrs_paddr
;
3093 /* Clear out any program headers we allocated but did not use. */
3094 for (; count
< alloc
; count
++, p
++)
3096 memset (p
, 0, sizeof *p
);
3097 p
->p_type
= PT_NULL
;
3100 elf_tdata (abfd
)->phdr
= phdrs
;
3102 elf_tdata (abfd
)->next_file_pos
= off
;
3104 /* Write out the program headers. */
3105 if (bfd_seek (abfd
, bed
->s
->sizeof_ehdr
, SEEK_SET
) != 0
3106 || bed
->s
->write_out_phdrs (abfd
, phdrs
, alloc
) != 0)
3112 /* Get the size of the program header.
3114 If this is called by the linker before any of the section VMA's are set, it
3115 can't calculate the correct value for a strange memory layout. This only
3116 happens when SIZEOF_HEADERS is used in a linker script. In this case,
3117 SORTED_HDRS is NULL and we assume the normal scenario of one text and one
3118 data segment (exclusive of .interp and .dynamic).
3120 ??? User written scripts must either not use SIZEOF_HEADERS, or assume there
3121 will be two segments. */
3123 static bfd_size_type
3124 get_program_header_size (abfd
)
3129 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3131 /* We can't return a different result each time we're called. */
3132 if (elf_tdata (abfd
)->program_header_size
!= 0)
3133 return elf_tdata (abfd
)->program_header_size
;
3135 if (elf_tdata (abfd
)->segment_map
!= NULL
)
3137 struct elf_segment_map
*m
;
3140 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
3142 elf_tdata (abfd
)->program_header_size
= segs
* bed
->s
->sizeof_phdr
;
3143 return elf_tdata (abfd
)->program_header_size
;
3146 /* Assume we will need exactly two PT_LOAD segments: one for text
3147 and one for data. */
3150 s
= bfd_get_section_by_name (abfd
, ".interp");
3151 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0)
3153 /* If we have a loadable interpreter section, we need a
3154 PT_INTERP segment. In this case, assume we also need a
3155 PT_PHDR segment, although that may not be true for all
3160 if (bfd_get_section_by_name (abfd
, ".dynamic") != NULL
)
3162 /* We need a PT_DYNAMIC segment. */
3166 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
3168 if ((s
->flags
& SEC_LOAD
) != 0
3169 && strncmp (s
->name
, ".note", 5) == 0)
3171 /* We need a PT_NOTE segment. */
3176 /* Let the backend count up any program headers it might need. */
3177 if (bed
->elf_backend_additional_program_headers
)
3181 a
= (*bed
->elf_backend_additional_program_headers
) (abfd
);
3187 elf_tdata (abfd
)->program_header_size
= segs
* bed
->s
->sizeof_phdr
;
3188 return elf_tdata (abfd
)->program_header_size
;
3191 /* Work out the file positions of all the sections. This is called by
3192 _bfd_elf_compute_section_file_positions. All the section sizes and
3193 VMAs must be known before this is called.
3195 We do not consider reloc sections at this point, unless they form
3196 part of the loadable image. Reloc sections are assigned file
3197 positions in assign_file_positions_for_relocs, which is called by
3198 write_object_contents and final_link.
3200 We also don't set the positions of the .symtab and .strtab here. */
3203 assign_file_positions_except_relocs (abfd
)
3206 struct elf_obj_tdata
* const tdata
= elf_tdata (abfd
);
3207 Elf_Internal_Ehdr
* const i_ehdrp
= elf_elfheader (abfd
);
3208 Elf_Internal_Shdr
** const i_shdrpp
= elf_elfsections (abfd
);
3210 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3212 if ((abfd
->flags
& (EXEC_P
| DYNAMIC
)) == 0
3213 && bfd_get_format (abfd
) != bfd_core
)
3215 Elf_Internal_Shdr
**hdrpp
;
3218 /* Start after the ELF header. */
3219 off
= i_ehdrp
->e_ehsize
;
3221 /* We are not creating an executable, which means that we are
3222 not creating a program header, and that the actual order of
3223 the sections in the file is unimportant. */
3224 for (i
= 1, hdrpp
= i_shdrpp
+ 1; i
< i_ehdrp
->e_shnum
; i
++, hdrpp
++)
3226 Elf_Internal_Shdr
*hdr
;
3229 if (hdr
->sh_type
== SHT_REL
|| hdr
->sh_type
== SHT_RELA
)
3231 hdr
->sh_offset
= -1;
3234 if (i
== tdata
->symtab_section
3235 || i
== tdata
->strtab_section
)
3237 hdr
->sh_offset
= -1;
3241 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, true);
3247 Elf_Internal_Shdr
**hdrpp
;
3249 /* Assign file positions for the loaded sections based on the
3250 assignment of sections to segments. */
3251 if (! assign_file_positions_for_segments (abfd
))
3254 /* Assign file positions for the other sections. */
3256 off
= elf_tdata (abfd
)->next_file_pos
;
3257 for (i
= 1, hdrpp
= i_shdrpp
+ 1; i
< i_ehdrp
->e_shnum
; i
++, hdrpp
++)
3259 Elf_Internal_Shdr
*hdr
;
3262 if (hdr
->bfd_section
!= NULL
3263 && hdr
->bfd_section
->filepos
!= 0)
3264 hdr
->sh_offset
= hdr
->bfd_section
->filepos
;
3265 else if ((hdr
->sh_flags
& SHF_ALLOC
) != 0)
3267 ((*_bfd_error_handler
)
3268 (_("%s: warning: allocated section `%s' not in segment"),
3269 bfd_get_filename (abfd
),
3270 (hdr
->bfd_section
== NULL
3272 : hdr
->bfd_section
->name
)));
3273 if ((abfd
->flags
& D_PAGED
) != 0)
3274 off
+= (hdr
->sh_addr
- off
) % bed
->maxpagesize
;
3276 off
+= (hdr
->sh_addr
- off
) % hdr
->sh_addralign
;
3277 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
,
3280 else if (hdr
->sh_type
== SHT_REL
3281 || hdr
->sh_type
== SHT_RELA
3282 || hdr
== i_shdrpp
[tdata
->symtab_section
]
3283 || hdr
== i_shdrpp
[tdata
->strtab_section
])
3284 hdr
->sh_offset
= -1;
3286 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, true);
3290 /* Place the section headers. */
3291 off
= align_file_position (off
, bed
->s
->file_align
);
3292 i_ehdrp
->e_shoff
= off
;
3293 off
+= i_ehdrp
->e_shnum
* i_ehdrp
->e_shentsize
;
3295 elf_tdata (abfd
)->next_file_pos
= off
;
3304 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
3305 Elf_Internal_Phdr
*i_phdrp
= 0; /* Program header table, internal form */
3306 Elf_Internal_Shdr
**i_shdrp
; /* Section header table, internal form */
3308 struct bfd_strtab_hash
*shstrtab
;
3309 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3311 i_ehdrp
= elf_elfheader (abfd
);
3312 i_shdrp
= elf_elfsections (abfd
);
3314 shstrtab
= _bfd_elf_stringtab_init ();
3315 if (shstrtab
== NULL
)
3318 elf_shstrtab (abfd
) = shstrtab
;
3320 i_ehdrp
->e_ident
[EI_MAG0
] = ELFMAG0
;
3321 i_ehdrp
->e_ident
[EI_MAG1
] = ELFMAG1
;
3322 i_ehdrp
->e_ident
[EI_MAG2
] = ELFMAG2
;
3323 i_ehdrp
->e_ident
[EI_MAG3
] = ELFMAG3
;
3325 i_ehdrp
->e_ident
[EI_CLASS
] = bed
->s
->elfclass
;
3326 i_ehdrp
->e_ident
[EI_DATA
] =
3327 bfd_big_endian (abfd
) ? ELFDATA2MSB
: ELFDATA2LSB
;
3328 i_ehdrp
->e_ident
[EI_VERSION
] = bed
->s
->ev_current
;
3330 i_ehdrp
->e_ident
[EI_OSABI
] = ELFOSABI_NONE
;
3331 i_ehdrp
->e_ident
[EI_ABIVERSION
] = 0;
3333 for (count
= EI_PAD
; count
< EI_NIDENT
; count
++)
3334 i_ehdrp
->e_ident
[count
] = 0;
3336 if ((abfd
->flags
& DYNAMIC
) != 0)
3337 i_ehdrp
->e_type
= ET_DYN
;
3338 else if ((abfd
->flags
& EXEC_P
) != 0)
3339 i_ehdrp
->e_type
= ET_EXEC
;
3340 else if (bfd_get_format (abfd
) == bfd_core
)
3341 i_ehdrp
->e_type
= ET_CORE
;
3343 i_ehdrp
->e_type
= ET_REL
;
3345 switch (bfd_get_arch (abfd
))
3347 case bfd_arch_unknown
:
3348 i_ehdrp
->e_machine
= EM_NONE
;
3350 case bfd_arch_sparc
:
3351 if (bfd_get_arch_size (abfd
) == 64)
3352 i_ehdrp
->e_machine
= EM_SPARCV9
;
3354 i_ehdrp
->e_machine
= EM_SPARC
;
3357 i_ehdrp
->e_machine
= EM_S370
;
3360 if (bfd_get_arch_size (abfd
) == 64)
3361 i_ehdrp
->e_machine
= EM_X86_64
;
3363 i_ehdrp
->e_machine
= EM_386
;
3366 i_ehdrp
->e_machine
= EM_IA_64
;
3368 case bfd_arch_m68hc11
:
3369 i_ehdrp
->e_machine
= EM_68HC11
;
3371 case bfd_arch_m68hc12
:
3372 i_ehdrp
->e_machine
= EM_68HC12
;
3375 i_ehdrp
->e_machine
= EM_S390
;
3378 i_ehdrp
->e_machine
= EM_68K
;
3381 i_ehdrp
->e_machine
= EM_88K
;
3384 i_ehdrp
->e_machine
= EM_860
;
3387 i_ehdrp
->e_machine
= EM_960
;
3389 case bfd_arch_mips
: /* MIPS Rxxxx */
3390 i_ehdrp
->e_machine
= EM_MIPS
; /* only MIPS R3000 */
3393 i_ehdrp
->e_machine
= EM_PARISC
;
3395 case bfd_arch_powerpc
:
3396 if (bed
->s
->arch_size
== 64)
3397 i_ehdrp
->e_machine
= EM_PPC64
;
3399 i_ehdrp
->e_machine
= EM_PPC
;
3401 case bfd_arch_alpha
:
3402 i_ehdrp
->e_machine
= EM_ALPHA
;
3405 i_ehdrp
->e_machine
= EM_SH
;
3408 i_ehdrp
->e_machine
= EM_CYGNUS_D10V
;
3411 i_ehdrp
->e_machine
= EM_CYGNUS_D30V
;
3414 i_ehdrp
->e_machine
= EM_CYGNUS_FR30
;
3416 case bfd_arch_mcore
:
3417 i_ehdrp
->e_machine
= EM_MCORE
;
3420 i_ehdrp
->e_machine
= EM_AVR
;
3423 switch (bfd_get_mach (abfd
))
3426 case 0: i_ehdrp
->e_machine
= EM_CYGNUS_V850
; break;
3430 i_ehdrp
->e_machine
= EM_CYGNUS_ARC
;
3433 i_ehdrp
->e_machine
= EM_ARM
;
3436 i_ehdrp
->e_machine
= EM_CYGNUS_M32R
;
3438 case bfd_arch_mn10200
:
3439 i_ehdrp
->e_machine
= EM_CYGNUS_MN10200
;
3441 case bfd_arch_mn10300
:
3442 i_ehdrp
->e_machine
= EM_CYGNUS_MN10300
;
3445 i_ehdrp
->e_machine
= EM_PJ
;
3448 i_ehdrp
->e_machine
= EM_CRIS
;
3450 case bfd_arch_openrisc
:
3451 i_ehdrp
->e_machine
= EM_OPENRISC
;
3453 /* Also note that EM_M32, AT&T WE32100 is unknown to bfd. */
3454 case bfd_arch_h8300
:
3455 switch (bfd_get_mach (abfd
))
3458 case bfd_mach_h8300
:
3459 i_ehdrp
->e_machine
= EM_H8_300
;
3461 case bfd_mach_h8300h
:
3462 i_ehdrp
->e_machine
= EM_H8_300H
;
3464 case bfd_mach_h8300s
:
3465 i_ehdrp
->e_machine
= EM_H8S
;
3469 case bfd_arch_h8500
:
3470 i_ehdrp
->e_machine
= EM_H8_500
;
3473 i_ehdrp
->e_machine
= EM_NONE
;
3475 i_ehdrp
->e_version
= bed
->s
->ev_current
;
3476 i_ehdrp
->e_ehsize
= bed
->s
->sizeof_ehdr
;
3478 /* No program header, for now. */
3479 i_ehdrp
->e_phoff
= 0;
3480 i_ehdrp
->e_phentsize
= 0;
3481 i_ehdrp
->e_phnum
= 0;
3483 /* Each bfd section is section header entry. */
3484 i_ehdrp
->e_entry
= bfd_get_start_address (abfd
);
3485 i_ehdrp
->e_shentsize
= bed
->s
->sizeof_shdr
;
3487 /* If we're building an executable, we'll need a program header table. */
3488 if (abfd
->flags
& EXEC_P
)
3490 /* It all happens later. */
3492 i_ehdrp
->e_phentsize
= sizeof (Elf_External_Phdr
);
3494 /* elf_build_phdrs() returns a (NULL-terminated) array of
3495 Elf_Internal_Phdrs. */
3496 i_phdrp
= elf_build_phdrs (abfd
, i_ehdrp
, i_shdrp
, &i_ehdrp
->e_phnum
);
3497 i_ehdrp
->e_phoff
= outbase
;
3498 outbase
+= i_ehdrp
->e_phentsize
* i_ehdrp
->e_phnum
;
3503 i_ehdrp
->e_phentsize
= 0;
3505 i_ehdrp
->e_phoff
= 0;
3508 elf_tdata (abfd
)->symtab_hdr
.sh_name
=
3509 (unsigned int) _bfd_stringtab_add (shstrtab
, ".symtab", true, false);
3510 elf_tdata (abfd
)->strtab_hdr
.sh_name
=
3511 (unsigned int) _bfd_stringtab_add (shstrtab
, ".strtab", true, false);
3512 elf_tdata (abfd
)->shstrtab_hdr
.sh_name
=
3513 (unsigned int) _bfd_stringtab_add (shstrtab
, ".shstrtab", true, false);
3514 if (elf_tdata (abfd
)->symtab_hdr
.sh_name
== (unsigned int) -1
3515 || elf_tdata (abfd
)->symtab_hdr
.sh_name
== (unsigned int) -1
3516 || elf_tdata (abfd
)->shstrtab_hdr
.sh_name
== (unsigned int) -1)
3522 /* Assign file positions for all the reloc sections which are not part
3523 of the loadable file image. */
3526 _bfd_elf_assign_file_positions_for_relocs (abfd
)
3531 Elf_Internal_Shdr
**shdrpp
;
3533 off
= elf_tdata (abfd
)->next_file_pos
;
3535 for (i
= 1, shdrpp
= elf_elfsections (abfd
) + 1;
3536 i
< elf_elfheader (abfd
)->e_shnum
;
3539 Elf_Internal_Shdr
*shdrp
;
3542 if ((shdrp
->sh_type
== SHT_REL
|| shdrp
->sh_type
== SHT_RELA
)
3543 && shdrp
->sh_offset
== -1)
3544 off
= _bfd_elf_assign_file_position_for_section (shdrp
, off
, true);
3547 elf_tdata (abfd
)->next_file_pos
= off
;
3551 _bfd_elf_write_object_contents (abfd
)
3554 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3555 Elf_Internal_Ehdr
*i_ehdrp
;
3556 Elf_Internal_Shdr
**i_shdrp
;
3560 if (! abfd
->output_has_begun
3561 && ! _bfd_elf_compute_section_file_positions
3562 (abfd
, (struct bfd_link_info
*) NULL
))
3565 i_shdrp
= elf_elfsections (abfd
);
3566 i_ehdrp
= elf_elfheader (abfd
);
3569 bfd_map_over_sections (abfd
, bed
->s
->write_relocs
, &failed
);
3573 _bfd_elf_assign_file_positions_for_relocs (abfd
);
3575 /* After writing the headers, we need to write the sections too... */
3576 for (count
= 1; count
< i_ehdrp
->e_shnum
; count
++)
3578 if (bed
->elf_backend_section_processing
)
3579 (*bed
->elf_backend_section_processing
) (abfd
, i_shdrp
[count
]);
3580 if (i_shdrp
[count
]->contents
)
3582 if (bfd_seek (abfd
, i_shdrp
[count
]->sh_offset
, SEEK_SET
) != 0
3583 || (bfd_write (i_shdrp
[count
]->contents
, i_shdrp
[count
]->sh_size
,
3585 != i_shdrp
[count
]->sh_size
))
3590 /* Write out the section header names. */
3591 if (bfd_seek (abfd
, elf_tdata (abfd
)->shstrtab_hdr
.sh_offset
, SEEK_SET
) != 0
3592 || ! _bfd_stringtab_emit (abfd
, elf_shstrtab (abfd
)))
3595 if (bed
->elf_backend_final_write_processing
)
3596 (*bed
->elf_backend_final_write_processing
) (abfd
,
3597 elf_tdata (abfd
)->linker
);
3599 return bed
->s
->write_shdrs_and_ehdr (abfd
);
3603 _bfd_elf_write_corefile_contents (abfd
)
3606 /* Hopefully this can be done just like an object file. */
3607 return _bfd_elf_write_object_contents (abfd
);
3610 /* Given a section, search the header to find them. */
3613 _bfd_elf_section_from_bfd_section (abfd
, asect
)
3617 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3618 Elf_Internal_Shdr
**i_shdrp
= elf_elfsections (abfd
);
3620 Elf_Internal_Shdr
*hdr
;
3621 int maxindex
= elf_elfheader (abfd
)->e_shnum
;
3623 for (index
= 0; index
< maxindex
; index
++)
3625 hdr
= i_shdrp
[index
];
3626 if (hdr
->bfd_section
== asect
)
3630 if (bed
->elf_backend_section_from_bfd_section
)
3632 for (index
= 0; index
< maxindex
; index
++)
3636 hdr
= i_shdrp
[index
];
3638 if ((*bed
->elf_backend_section_from_bfd_section
)
3639 (abfd
, hdr
, asect
, &retval
))
3644 if (bfd_is_abs_section (asect
))
3646 if (bfd_is_com_section (asect
))
3648 if (bfd_is_und_section (asect
))
3651 bfd_set_error (bfd_error_nonrepresentable_section
);
3656 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
3660 _bfd_elf_symbol_from_bfd_symbol (abfd
, asym_ptr_ptr
)
3662 asymbol
**asym_ptr_ptr
;
3664 asymbol
*asym_ptr
= *asym_ptr_ptr
;
3666 flagword flags
= asym_ptr
->flags
;
3668 /* When gas creates relocations against local labels, it creates its
3669 own symbol for the section, but does put the symbol into the
3670 symbol chain, so udata is 0. When the linker is generating
3671 relocatable output, this section symbol may be for one of the
3672 input sections rather than the output section. */
3673 if (asym_ptr
->udata
.i
== 0
3674 && (flags
& BSF_SECTION_SYM
)
3675 && asym_ptr
->section
)
3679 if (asym_ptr
->section
->output_section
!= NULL
)
3680 indx
= asym_ptr
->section
->output_section
->index
;
3682 indx
= asym_ptr
->section
->index
;
3683 if (indx
< elf_num_section_syms (abfd
)
3684 && elf_section_syms (abfd
)[indx
] != NULL
)
3685 asym_ptr
->udata
.i
= elf_section_syms (abfd
)[indx
]->udata
.i
;
3688 idx
= asym_ptr
->udata
.i
;
3692 /* This case can occur when using --strip-symbol on a symbol
3693 which is used in a relocation entry. */
3694 (*_bfd_error_handler
)
3695 (_("%s: symbol `%s' required but not present"),
3696 bfd_get_filename (abfd
), bfd_asymbol_name (asym_ptr
));
3697 bfd_set_error (bfd_error_no_symbols
);
3704 _("elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n"),
3705 (long) asym_ptr
, asym_ptr
->name
, idx
, flags
,
3706 elf_symbol_flags (flags
));
3714 /* Copy private BFD data. This copies any program header information. */
3717 copy_private_bfd_data (ibfd
, obfd
)
3721 Elf_Internal_Ehdr
* iehdr
;
3722 struct elf_segment_map
* map
;
3723 struct elf_segment_map
* map_first
;
3724 struct elf_segment_map
** pointer_to_map
;
3725 Elf_Internal_Phdr
* segment
;
3728 unsigned int num_segments
;
3729 boolean phdr_included
= false;
3730 bfd_vma maxpagesize
;
3731 struct elf_segment_map
* phdr_adjust_seg
= NULL
;
3732 unsigned int phdr_adjust_num
= 0;
3734 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
3735 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
3738 if (elf_tdata (ibfd
)->phdr
== NULL
)
3741 iehdr
= elf_elfheader (ibfd
);
3744 pointer_to_map
= &map_first
;
3746 num_segments
= elf_elfheader (ibfd
)->e_phnum
;
3747 maxpagesize
= get_elf_backend_data (obfd
)->maxpagesize
;
3749 /* Returns the end address of the segment + 1. */
3750 #define SEGMENT_END(segment, start) \
3751 (start + (segment->p_memsz > segment->p_filesz \
3752 ? segment->p_memsz : segment->p_filesz))
3754 /* Returns true if the given section is contained within
3755 the given segment. VMA addresses are compared. */
3756 #define IS_CONTAINED_BY_VMA(section, segment) \
3757 (section->vma >= segment->p_vaddr \
3758 && (section->vma + section->_raw_size) \
3759 <= (SEGMENT_END (segment, segment->p_vaddr)))
3761 /* Returns true if the given section is contained within
3762 the given segment. LMA addresses are compared. */
3763 #define IS_CONTAINED_BY_LMA(section, segment, base) \
3764 (section->lma >= base \
3765 && (section->lma + section->_raw_size) \
3766 <= SEGMENT_END (segment, base))
3768 /* Special case: corefile "NOTE" section containing regs, prpsinfo etc. */
3769 #define IS_COREFILE_NOTE(p, s) \
3770 (p->p_type == PT_NOTE \
3771 && bfd_get_format (ibfd) == bfd_core \
3772 && s->vma == 0 && s->lma == 0 \
3773 && (bfd_vma) s->filepos >= p->p_offset \
3774 && (bfd_vma) s->filepos + s->_raw_size \
3775 <= p->p_offset + p->p_filesz)
3777 /* The complicated case when p_vaddr is 0 is to handle the Solaris
3778 linker, which generates a PT_INTERP section with p_vaddr and
3779 p_memsz set to 0. */
3780 #define IS_SOLARIS_PT_INTERP(p, s) \
3782 && p->p_filesz > 0 \
3783 && (s->flags & SEC_HAS_CONTENTS) != 0 \
3784 && s->_raw_size > 0 \
3785 && (bfd_vma) s->filepos >= p->p_offset \
3786 && ((bfd_vma) s->filepos + s->_raw_size \
3787 <= p->p_offset + p->p_filesz))
3789 /* Decide if the given section should be included in the given segment.
3790 A section will be included if:
3791 1. It is within the address space of the segment,
3792 2. It is an allocated segment,
3793 3. There is an output section associated with it,
3794 4. The section has not already been allocated to a previous segment. */
3795 #define INCLUDE_SECTION_IN_SEGMENT(section, segment) \
3796 ((((IS_CONTAINED_BY_VMA (section, segment) \
3797 || IS_SOLARIS_PT_INTERP (segment, section)) \
3798 && (section->flags & SEC_ALLOC) != 0) \
3799 || IS_COREFILE_NOTE (segment, section)) \
3800 && section->output_section != NULL \
3801 && section->segment_mark == false)
3803 /* Returns true iff seg1 starts after the end of seg2. */
3804 #define SEGMENT_AFTER_SEGMENT(seg1, seg2) \
3805 (seg1->p_vaddr >= SEGMENT_END (seg2, seg2->p_vaddr))
3807 /* Returns true iff seg1 and seg2 overlap. */
3808 #define SEGMENT_OVERLAPS(seg1, seg2) \
3809 (!(SEGMENT_AFTER_SEGMENT (seg1, seg2) || SEGMENT_AFTER_SEGMENT (seg2, seg1)))
3811 /* Initialise the segment mark field. */
3812 for (section
= ibfd
->sections
; section
!= NULL
; section
= section
->next
)
3813 section
->segment_mark
= false;
3815 /* Scan through the segments specified in the program header
3816 of the input BFD. For this first scan we look for overlaps
3817 in the loadable segments. These can be created by wierd
3818 parameters to objcopy. */
3819 for (i
= 0, segment
= elf_tdata (ibfd
)->phdr
;
3824 Elf_Internal_Phdr
*segment2
;
3826 if (segment
->p_type
!= PT_LOAD
)
3829 /* Determine if this segment overlaps any previous segments. */
3830 for (j
= 0, segment2
= elf_tdata (ibfd
)->phdr
; j
< i
; j
++, segment2
++)
3832 bfd_signed_vma extra_length
;
3834 if (segment2
->p_type
!= PT_LOAD
3835 || ! SEGMENT_OVERLAPS (segment
, segment2
))
3838 /* Merge the two segments together. */
3839 if (segment2
->p_vaddr
< segment
->p_vaddr
)
3841 /* Extend SEGMENT2 to include SEGMENT and then delete
3844 SEGMENT_END (segment
, segment
->p_vaddr
)
3845 - SEGMENT_END (segment2
, segment2
->p_vaddr
);
3847 if (extra_length
> 0)
3849 segment2
->p_memsz
+= extra_length
;
3850 segment2
->p_filesz
+= extra_length
;
3853 segment
->p_type
= PT_NULL
;
3855 /* Since we have deleted P we must restart the outer loop. */
3857 segment
= elf_tdata (ibfd
)->phdr
;
3862 /* Extend SEGMENT to include SEGMENT2 and then delete
3865 SEGMENT_END (segment2
, segment2
->p_vaddr
)
3866 - SEGMENT_END (segment
, segment
->p_vaddr
);
3868 if (extra_length
> 0)
3870 segment
->p_memsz
+= extra_length
;
3871 segment
->p_filesz
+= extra_length
;
3874 segment2
->p_type
= PT_NULL
;
3879 /* The second scan attempts to assign sections to segments. */
3880 for (i
= 0, segment
= elf_tdata (ibfd
)->phdr
;
3884 unsigned int section_count
;
3885 asection
** sections
;
3886 asection
* output_section
;
3888 bfd_vma matching_lma
;
3889 bfd_vma suggested_lma
;
3892 if (segment
->p_type
== PT_NULL
)
3895 /* Compute how many sections might be placed into this segment. */
3897 for (section
= ibfd
->sections
; section
!= NULL
; section
= section
->next
)
3898 if (INCLUDE_SECTION_IN_SEGMENT (section
, segment
))
3901 /* Allocate a segment map big enough to contain all of the
3902 sections we have selected. */
3903 map
= ((struct elf_segment_map
*)
3905 (sizeof (struct elf_segment_map
)
3906 + ((size_t) section_count
- 1) * sizeof (asection
*))));
3910 /* Initialise the fields of the segment map. Default to
3911 using the physical address of the segment in the input BFD. */
3913 map
->p_type
= segment
->p_type
;
3914 map
->p_flags
= segment
->p_flags
;
3915 map
->p_flags_valid
= 1;
3916 map
->p_paddr
= segment
->p_paddr
;
3917 map
->p_paddr_valid
= 1;
3919 /* Determine if this segment contains the ELF file header
3920 and if it contains the program headers themselves. */
3921 map
->includes_filehdr
= (segment
->p_offset
== 0
3922 && segment
->p_filesz
>= iehdr
->e_ehsize
);
3924 map
->includes_phdrs
= 0;
3926 if (! phdr_included
|| segment
->p_type
!= PT_LOAD
)
3928 map
->includes_phdrs
=
3929 (segment
->p_offset
<= (bfd_vma
) iehdr
->e_phoff
3930 && (segment
->p_offset
+ segment
->p_filesz
3931 >= ((bfd_vma
) iehdr
->e_phoff
3932 + iehdr
->e_phnum
* iehdr
->e_phentsize
)));
3934 if (segment
->p_type
== PT_LOAD
&& map
->includes_phdrs
)
3935 phdr_included
= true;
3938 if (section_count
== 0)
3940 /* Special segments, such as the PT_PHDR segment, may contain
3941 no sections, but ordinary, loadable segments should contain
3943 if (segment
->p_type
== PT_LOAD
)
3945 (_("%s: warning: Empty loadable segment detected\n"),
3946 bfd_get_filename (ibfd
));
3949 *pointer_to_map
= map
;
3950 pointer_to_map
= &map
->next
;
3955 /* Now scan the sections in the input BFD again and attempt
3956 to add their corresponding output sections to the segment map.
3957 The problem here is how to handle an output section which has
3958 been moved (ie had its LMA changed). There are four possibilities:
3960 1. None of the sections have been moved.
3961 In this case we can continue to use the segment LMA from the
3964 2. All of the sections have been moved by the same amount.
3965 In this case we can change the segment's LMA to match the LMA
3966 of the first section.
3968 3. Some of the sections have been moved, others have not.
3969 In this case those sections which have not been moved can be
3970 placed in the current segment which will have to have its size,
3971 and possibly its LMA changed, and a new segment or segments will
3972 have to be created to contain the other sections.
3974 4. The sections have been moved, but not be the same amount.
3975 In this case we can change the segment's LMA to match the LMA
3976 of the first section and we will have to create a new segment
3977 or segments to contain the other sections.
3979 In order to save time, we allocate an array to hold the section
3980 pointers that we are interested in. As these sections get assigned
3981 to a segment, they are removed from this array. */
3983 sections
= (asection
**) bfd_malloc
3984 (sizeof (asection
*) * section_count
);
3985 if (sections
== NULL
)
3988 /* Step One: Scan for segment vs section LMA conflicts.
3989 Also add the sections to the section array allocated above.
3990 Also add the sections to the current segment. In the common
3991 case, where the sections have not been moved, this means that
3992 we have completely filled the segment, and there is nothing
3998 for (j
= 0, section
= ibfd
->sections
;
4000 section
= section
->next
)
4002 if (INCLUDE_SECTION_IN_SEGMENT (section
, segment
))
4004 output_section
= section
->output_section
;
4006 sections
[j
++] = section
;
4008 /* The Solaris native linker always sets p_paddr to 0.
4009 We try to catch that case here, and set it to the
4011 if (segment
->p_paddr
== 0
4012 && segment
->p_vaddr
!= 0
4014 && output_section
->lma
!= 0
4015 && (output_section
->vma
== (segment
->p_vaddr
4016 + (map
->includes_filehdr
4019 + (map
->includes_phdrs
4020 ? iehdr
->e_phnum
* iehdr
->e_phentsize
4022 map
->p_paddr
= segment
->p_vaddr
;
4024 /* Match up the physical address of the segment with the
4025 LMA address of the output section. */
4026 if (IS_CONTAINED_BY_LMA (output_section
, segment
, map
->p_paddr
)
4027 || IS_COREFILE_NOTE (segment
, section
))
4029 if (matching_lma
== 0)
4030 matching_lma
= output_section
->lma
;
4032 /* We assume that if the section fits within the segment
4033 then it does not overlap any other section within that
4035 map
->sections
[isec
++] = output_section
;
4037 else if (suggested_lma
== 0)
4038 suggested_lma
= output_section
->lma
;
4042 BFD_ASSERT (j
== section_count
);
4044 /* Step Two: Adjust the physical address of the current segment,
4046 if (isec
== section_count
)
4048 /* All of the sections fitted within the segment as currently
4049 specified. This is the default case. Add the segment to
4050 the list of built segments and carry on to process the next
4051 program header in the input BFD. */
4052 map
->count
= section_count
;
4053 *pointer_to_map
= map
;
4054 pointer_to_map
= &map
->next
;
4061 if (matching_lma
!= 0)
4063 /* At least one section fits inside the current segment.
4064 Keep it, but modify its physical address to match the
4065 LMA of the first section that fitted. */
4066 map
->p_paddr
= matching_lma
;
4070 /* None of the sections fitted inside the current segment.
4071 Change the current segment's physical address to match
4072 the LMA of the first section. */
4073 map
->p_paddr
= suggested_lma
;
4076 /* Offset the segment physical address from the lma
4077 to allow for space taken up by elf headers. */
4078 if (map
->includes_filehdr
)
4079 map
->p_paddr
-= iehdr
->e_ehsize
;
4081 if (map
->includes_phdrs
)
4083 map
->p_paddr
-= iehdr
->e_phnum
* iehdr
->e_phentsize
;
4085 /* iehdr->e_phnum is just an estimate of the number
4086 of program headers that we will need. Make a note
4087 here of the number we used and the segment we chose
4088 to hold these headers, so that we can adjust the
4089 offset when we know the correct value. */
4090 phdr_adjust_num
= iehdr
->e_phnum
;
4091 phdr_adjust_seg
= map
;
4095 /* Step Three: Loop over the sections again, this time assigning
4096 those that fit to the current segment and remvoing them from the
4097 sections array; but making sure not to leave large gaps. Once all
4098 possible sections have been assigned to the current segment it is
4099 added to the list of built segments and if sections still remain
4100 to be assigned, a new segment is constructed before repeating
4108 /* Fill the current segment with sections that fit. */
4109 for (j
= 0; j
< section_count
; j
++)
4111 section
= sections
[j
];
4113 if (section
== NULL
)
4116 output_section
= section
->output_section
;
4118 BFD_ASSERT (output_section
!= NULL
);
4120 if (IS_CONTAINED_BY_LMA (output_section
, segment
, map
->p_paddr
)
4121 || IS_COREFILE_NOTE (segment
, section
))
4123 if (map
->count
== 0)
4125 /* If the first section in a segment does not start at
4126 the beginning of the segment, then something is
4128 if (output_section
->lma
!=
4130 + (map
->includes_filehdr
? iehdr
->e_ehsize
: 0)
4131 + (map
->includes_phdrs
4132 ? iehdr
->e_phnum
* iehdr
->e_phentsize
4138 asection
* prev_sec
;
4140 prev_sec
= map
->sections
[map
->count
- 1];
4142 /* If the gap between the end of the previous section
4143 and the start of this section is more than
4144 maxpagesize then we need to start a new segment. */
4145 if ((BFD_ALIGN (prev_sec
->lma
+ prev_sec
->_raw_size
, maxpagesize
)
4146 < BFD_ALIGN (output_section
->lma
, maxpagesize
))
4147 || ((prev_sec
->lma
+ prev_sec
->_raw_size
) > output_section
->lma
))
4149 if (suggested_lma
== 0)
4150 suggested_lma
= output_section
->lma
;
4156 map
->sections
[map
->count
++] = output_section
;
4159 section
->segment_mark
= true;
4161 else if (suggested_lma
== 0)
4162 suggested_lma
= output_section
->lma
;
4165 BFD_ASSERT (map
->count
> 0);
4167 /* Add the current segment to the list of built segments. */
4168 *pointer_to_map
= map
;
4169 pointer_to_map
= &map
->next
;
4171 if (isec
< section_count
)
4173 /* We still have not allocated all of the sections to
4174 segments. Create a new segment here, initialise it
4175 and carry on looping. */
4176 map
= ((struct elf_segment_map
*)
4178 (sizeof (struct elf_segment_map
)
4179 + ((size_t) section_count
- 1)
4180 * sizeof (asection
*))));
4184 /* Initialise the fields of the segment map. Set the physical
4185 physical address to the LMA of the first section that has
4186 not yet been assigned. */
4188 map
->p_type
= segment
->p_type
;
4189 map
->p_flags
= segment
->p_flags
;
4190 map
->p_flags_valid
= 1;
4191 map
->p_paddr
= suggested_lma
;
4192 map
->p_paddr_valid
= 1;
4193 map
->includes_filehdr
= 0;
4194 map
->includes_phdrs
= 0;
4197 while (isec
< section_count
);
4202 /* The Solaris linker creates program headers in which all the
4203 p_paddr fields are zero. When we try to objcopy or strip such a
4204 file, we get confused. Check for this case, and if we find it
4205 reset the p_paddr_valid fields. */
4206 for (map
= map_first
; map
!= NULL
; map
= map
->next
)
4207 if (map
->p_paddr
!= 0)
4211 for (map
= map_first
; map
!= NULL
; map
= map
->next
)
4212 map
->p_paddr_valid
= 0;
4215 elf_tdata (obfd
)->segment_map
= map_first
;
4217 /* If we had to estimate the number of program headers that were
4218 going to be needed, then check our estimate know and adjust
4219 the offset if necessary. */
4220 if (phdr_adjust_seg
!= NULL
)
4224 for (count
= 0, map
= map_first
; map
!= NULL
; map
= map
->next
)
4227 if (count
> phdr_adjust_num
)
4228 phdr_adjust_seg
->p_paddr
4229 -= (count
- phdr_adjust_num
) * iehdr
->e_phentsize
;
4233 /* Final Step: Sort the segments into ascending order of physical
4235 if (map_first
!= NULL
)
4237 struct elf_segment_map
*prev
;
4240 for (map
= map_first
->next
; map
!= NULL
; prev
= map
, map
= map
->next
)
4242 /* Yes I know - its a bubble sort.... */
4243 if (map
->next
!= NULL
&& (map
->next
->p_paddr
< map
->p_paddr
))
4245 /* Swap map and map->next. */
4246 prev
->next
= map
->next
;
4247 map
->next
= map
->next
->next
;
4248 prev
->next
->next
= map
;
4258 #undef IS_CONTAINED_BY_VMA
4259 #undef IS_CONTAINED_BY_LMA
4260 #undef IS_COREFILE_NOTE
4261 #undef IS_SOLARIS_PT_INTERP
4262 #undef INCLUDE_SECTION_IN_SEGMENT
4263 #undef SEGMENT_AFTER_SEGMENT
4264 #undef SEGMENT_OVERLAPS
4268 /* Copy private section information. This copies over the entsize
4269 field, and sometimes the info field. */
4272 _bfd_elf_copy_private_section_data (ibfd
, isec
, obfd
, osec
)
4278 Elf_Internal_Shdr
*ihdr
, *ohdr
;
4280 if (ibfd
->xvec
->flavour
!= bfd_target_elf_flavour
4281 || obfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
4284 /* Copy over private BFD data if it has not already been copied.
4285 This must be done here, rather than in the copy_private_bfd_data
4286 entry point, because the latter is called after the section
4287 contents have been set, which means that the program headers have
4288 already been worked out. */
4289 if (elf_tdata (obfd
)->segment_map
== NULL
4290 && elf_tdata (ibfd
)->phdr
!= NULL
)
4294 /* Only set up the segments if there are no more SEC_ALLOC
4295 sections. FIXME: This won't do the right thing if objcopy is
4296 used to remove the last SEC_ALLOC section, since objcopy
4297 won't call this routine in that case. */
4298 for (s
= isec
->next
; s
!= NULL
; s
= s
->next
)
4299 if ((s
->flags
& SEC_ALLOC
) != 0)
4303 if (! copy_private_bfd_data (ibfd
, obfd
))
4308 ihdr
= &elf_section_data (isec
)->this_hdr
;
4309 ohdr
= &elf_section_data (osec
)->this_hdr
;
4311 ohdr
->sh_entsize
= ihdr
->sh_entsize
;
4313 if (ihdr
->sh_type
== SHT_SYMTAB
4314 || ihdr
->sh_type
== SHT_DYNSYM
4315 || ihdr
->sh_type
== SHT_GNU_verneed
4316 || ihdr
->sh_type
== SHT_GNU_verdef
)
4317 ohdr
->sh_info
= ihdr
->sh_info
;
4319 elf_section_data (osec
)->use_rela_p
4320 = elf_section_data (isec
)->use_rela_p
;
4325 /* Copy private symbol information. If this symbol is in a section
4326 which we did not map into a BFD section, try to map the section
4327 index correctly. We use special macro definitions for the mapped
4328 section indices; these definitions are interpreted by the
4329 swap_out_syms function. */
4331 #define MAP_ONESYMTAB (SHN_LORESERVE - 1)
4332 #define MAP_DYNSYMTAB (SHN_LORESERVE - 2)
4333 #define MAP_STRTAB (SHN_LORESERVE - 3)
4334 #define MAP_SHSTRTAB (SHN_LORESERVE - 4)
4337 _bfd_elf_copy_private_symbol_data (ibfd
, isymarg
, obfd
, osymarg
)
4343 elf_symbol_type
*isym
, *osym
;
4345 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
4346 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
4349 isym
= elf_symbol_from (ibfd
, isymarg
);
4350 osym
= elf_symbol_from (obfd
, osymarg
);
4354 && bfd_is_abs_section (isym
->symbol
.section
))
4358 shndx
= isym
->internal_elf_sym
.st_shndx
;
4359 if (shndx
== elf_onesymtab (ibfd
))
4360 shndx
= MAP_ONESYMTAB
;
4361 else if (shndx
== elf_dynsymtab (ibfd
))
4362 shndx
= MAP_DYNSYMTAB
;
4363 else if (shndx
== elf_tdata (ibfd
)->strtab_section
)
4365 else if (shndx
== elf_tdata (ibfd
)->shstrtab_section
)
4366 shndx
= MAP_SHSTRTAB
;
4367 osym
->internal_elf_sym
.st_shndx
= shndx
;
4373 /* Swap out the symbols. */
4376 swap_out_syms (abfd
, sttp
, relocatable_p
)
4378 struct bfd_strtab_hash
**sttp
;
4381 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4383 if (!elf_map_symbols (abfd
))
4386 /* Dump out the symtabs. */
4388 int symcount
= bfd_get_symcount (abfd
);
4389 asymbol
**syms
= bfd_get_outsymbols (abfd
);
4390 struct bfd_strtab_hash
*stt
;
4391 Elf_Internal_Shdr
*symtab_hdr
;
4392 Elf_Internal_Shdr
*symstrtab_hdr
;
4393 char *outbound_syms
;
4396 stt
= _bfd_elf_stringtab_init ();
4400 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
4401 symtab_hdr
->sh_type
= SHT_SYMTAB
;
4402 symtab_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
4403 symtab_hdr
->sh_size
= symtab_hdr
->sh_entsize
* (symcount
+ 1);
4404 symtab_hdr
->sh_info
= elf_num_locals (abfd
) + 1;
4405 symtab_hdr
->sh_addralign
= bed
->s
->file_align
;
4407 symstrtab_hdr
= &elf_tdata (abfd
)->strtab_hdr
;
4408 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
4410 outbound_syms
= bfd_alloc (abfd
,
4411 (1 + symcount
) * bed
->s
->sizeof_sym
);
4412 if (outbound_syms
== NULL
)
4414 symtab_hdr
->contents
= (PTR
) outbound_syms
;
4416 /* now generate the data (for "contents") */
4418 /* Fill in zeroth symbol and swap it out. */
4419 Elf_Internal_Sym sym
;
4425 sym
.st_shndx
= SHN_UNDEF
;
4426 bed
->s
->swap_symbol_out (abfd
, &sym
, (PTR
) outbound_syms
);
4427 outbound_syms
+= bed
->s
->sizeof_sym
;
4429 for (idx
= 0; idx
< symcount
; idx
++)
4431 Elf_Internal_Sym sym
;
4432 bfd_vma value
= syms
[idx
]->value
;
4433 elf_symbol_type
*type_ptr
;
4434 flagword flags
= syms
[idx
]->flags
;
4437 if ((flags
& (BSF_SECTION_SYM
| BSF_GLOBAL
)) == BSF_SECTION_SYM
)
4439 /* Local section symbols have no name. */
4444 sym
.st_name
= (unsigned long) _bfd_stringtab_add (stt
,
4447 if (sym
.st_name
== (unsigned long) -1)
4451 type_ptr
= elf_symbol_from (abfd
, syms
[idx
]);
4453 if ((flags
& BSF_SECTION_SYM
) == 0
4454 && bfd_is_com_section (syms
[idx
]->section
))
4456 /* ELF common symbols put the alignment into the `value' field,
4457 and the size into the `size' field. This is backwards from
4458 how BFD handles it, so reverse it here. */
4459 sym
.st_size
= value
;
4460 if (type_ptr
== NULL
4461 || type_ptr
->internal_elf_sym
.st_value
== 0)
4462 sym
.st_value
= value
>= 16 ? 16 : (1 << bfd_log2 (value
));
4464 sym
.st_value
= type_ptr
->internal_elf_sym
.st_value
;
4465 sym
.st_shndx
= _bfd_elf_section_from_bfd_section
4466 (abfd
, syms
[idx
]->section
);
4470 asection
*sec
= syms
[idx
]->section
;
4473 if (sec
->output_section
)
4475 value
+= sec
->output_offset
;
4476 sec
= sec
->output_section
;
4478 /* Don't add in the section vma for relocatable output. */
4479 if (! relocatable_p
)
4481 sym
.st_value
= value
;
4482 sym
.st_size
= type_ptr
? type_ptr
->internal_elf_sym
.st_size
: 0;
4484 if (bfd_is_abs_section (sec
)
4486 && type_ptr
->internal_elf_sym
.st_shndx
!= 0)
4488 /* This symbol is in a real ELF section which we did
4489 not create as a BFD section. Undo the mapping done
4490 by copy_private_symbol_data. */
4491 shndx
= type_ptr
->internal_elf_sym
.st_shndx
;
4495 shndx
= elf_onesymtab (abfd
);
4498 shndx
= elf_dynsymtab (abfd
);
4501 shndx
= elf_tdata (abfd
)->strtab_section
;
4504 shndx
= elf_tdata (abfd
)->shstrtab_section
;
4512 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec
);
4518 /* Writing this would be a hell of a lot easier if
4519 we had some decent documentation on bfd, and
4520 knew what to expect of the library, and what to
4521 demand of applications. For example, it
4522 appears that `objcopy' might not set the
4523 section of a symbol to be a section that is
4524 actually in the output file. */
4525 sec2
= bfd_get_section_by_name (abfd
, sec
->name
);
4526 BFD_ASSERT (sec2
!= 0);
4527 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec2
);
4528 BFD_ASSERT (shndx
!= -1);
4532 sym
.st_shndx
= shndx
;
4535 if ((flags
& BSF_FUNCTION
) != 0)
4537 else if ((flags
& BSF_OBJECT
) != 0)
4542 /* Processor-specific types */
4543 if (type_ptr
!= NULL
4544 && bed
->elf_backend_get_symbol_type
)
4545 type
= (*bed
->elf_backend_get_symbol_type
) (&type_ptr
->internal_elf_sym
, type
);
4547 if (flags
& BSF_SECTION_SYM
)
4549 if (flags
& BSF_GLOBAL
)
4550 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, STT_SECTION
);
4552 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_SECTION
);
4554 else if (bfd_is_com_section (syms
[idx
]->section
))
4555 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, type
);
4556 else if (bfd_is_und_section (syms
[idx
]->section
))
4557 sym
.st_info
= ELF_ST_INFO (((flags
& BSF_WEAK
)
4561 else if (flags
& BSF_FILE
)
4562 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FILE
);
4565 int bind
= STB_LOCAL
;
4567 if (flags
& BSF_LOCAL
)
4569 else if (flags
& BSF_WEAK
)
4571 else if (flags
& BSF_GLOBAL
)
4574 sym
.st_info
= ELF_ST_INFO (bind
, type
);
4577 if (type_ptr
!= NULL
)
4578 sym
.st_other
= type_ptr
->internal_elf_sym
.st_other
;
4582 bed
->s
->swap_symbol_out (abfd
, &sym
, (PTR
) outbound_syms
);
4583 outbound_syms
+= bed
->s
->sizeof_sym
;
4587 symstrtab_hdr
->sh_size
= _bfd_stringtab_size (stt
);
4588 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
4590 symstrtab_hdr
->sh_flags
= 0;
4591 symstrtab_hdr
->sh_addr
= 0;
4592 symstrtab_hdr
->sh_entsize
= 0;
4593 symstrtab_hdr
->sh_link
= 0;
4594 symstrtab_hdr
->sh_info
= 0;
4595 symstrtab_hdr
->sh_addralign
= 1;
4601 /* Return the number of bytes required to hold the symtab vector.
4603 Note that we base it on the count plus 1, since we will null terminate
4604 the vector allocated based on this size. However, the ELF symbol table
4605 always has a dummy entry as symbol #0, so it ends up even. */
4608 _bfd_elf_get_symtab_upper_bound (abfd
)
4613 Elf_Internal_Shdr
*hdr
= &elf_tdata (abfd
)->symtab_hdr
;
4615 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
4616 symtab_size
= (symcount
- 1 + 1) * (sizeof (asymbol
*));
4622 _bfd_elf_get_dynamic_symtab_upper_bound (abfd
)
4627 Elf_Internal_Shdr
*hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
4629 if (elf_dynsymtab (abfd
) == 0)
4631 bfd_set_error (bfd_error_invalid_operation
);
4635 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
4636 symtab_size
= (symcount
- 1 + 1) * (sizeof (asymbol
*));
4642 _bfd_elf_get_reloc_upper_bound (abfd
, asect
)
4643 bfd
*abfd ATTRIBUTE_UNUSED
;
4646 return (asect
->reloc_count
+ 1) * sizeof (arelent
*);
4649 /* Canonicalize the relocs. */
4652 _bfd_elf_canonicalize_reloc (abfd
, section
, relptr
, symbols
)
4661 if (! get_elf_backend_data (abfd
)->s
->slurp_reloc_table (abfd
,
4667 tblptr
= section
->relocation
;
4668 for (i
= 0; i
< section
->reloc_count
; i
++)
4669 *relptr
++ = tblptr
++;
4673 return section
->reloc_count
;
4677 _bfd_elf_get_symtab (abfd
, alocation
)
4679 asymbol
**alocation
;
4681 long symcount
= get_elf_backend_data (abfd
)->s
->slurp_symbol_table
4682 (abfd
, alocation
, false);
4685 bfd_get_symcount (abfd
) = symcount
;
4690 _bfd_elf_canonicalize_dynamic_symtab (abfd
, alocation
)
4692 asymbol
**alocation
;
4694 return get_elf_backend_data (abfd
)->s
->slurp_symbol_table
4695 (abfd
, alocation
, true);
4698 /* Return the size required for the dynamic reloc entries. Any
4699 section that was actually installed in the BFD, and has type
4700 SHT_REL or SHT_RELA, and uses the dynamic symbol table, is
4701 considered to be a dynamic reloc section. */
4704 _bfd_elf_get_dynamic_reloc_upper_bound (abfd
)
4710 if (elf_dynsymtab (abfd
) == 0)
4712 bfd_set_error (bfd_error_invalid_operation
);
4716 ret
= sizeof (arelent
*);
4717 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
4718 if (elf_section_data (s
)->this_hdr
.sh_link
== elf_dynsymtab (abfd
)
4719 && (elf_section_data (s
)->this_hdr
.sh_type
== SHT_REL
4720 || elf_section_data (s
)->this_hdr
.sh_type
== SHT_RELA
))
4721 ret
+= ((s
->_raw_size
/ elf_section_data (s
)->this_hdr
.sh_entsize
)
4722 * sizeof (arelent
*));
4727 /* Canonicalize the dynamic relocation entries. Note that we return
4728 the dynamic relocations as a single block, although they are
4729 actually associated with particular sections; the interface, which
4730 was designed for SunOS style shared libraries, expects that there
4731 is only one set of dynamic relocs. Any section that was actually
4732 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses
4733 the dynamic symbol table, is considered to be a dynamic reloc
4737 _bfd_elf_canonicalize_dynamic_reloc (abfd
, storage
, syms
)
4742 boolean (*slurp_relocs
) PARAMS ((bfd
*, asection
*, asymbol
**, boolean
));
4746 if (elf_dynsymtab (abfd
) == 0)
4748 bfd_set_error (bfd_error_invalid_operation
);
4752 slurp_relocs
= get_elf_backend_data (abfd
)->s
->slurp_reloc_table
;
4754 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
4756 if (elf_section_data (s
)->this_hdr
.sh_link
== elf_dynsymtab (abfd
)
4757 && (elf_section_data (s
)->this_hdr
.sh_type
== SHT_REL
4758 || elf_section_data (s
)->this_hdr
.sh_type
== SHT_RELA
))
4763 if (! (*slurp_relocs
) (abfd
, s
, syms
, true))
4765 count
= s
->_raw_size
/ elf_section_data (s
)->this_hdr
.sh_entsize
;
4767 for (i
= 0; i
< count
; i
++)
4778 /* Read in the version information. */
4781 _bfd_elf_slurp_version_tables (abfd
)
4784 bfd_byte
*contents
= NULL
;
4786 if (elf_dynverdef (abfd
) != 0)
4788 Elf_Internal_Shdr
*hdr
;
4789 Elf_External_Verdef
*everdef
;
4790 Elf_Internal_Verdef
*iverdef
;
4791 Elf_Internal_Verdef
*iverdefarr
;
4792 Elf_Internal_Verdef iverdefmem
;
4794 unsigned int maxidx
;
4796 hdr
= &elf_tdata (abfd
)->dynverdef_hdr
;
4798 contents
= (bfd_byte
*) bfd_malloc (hdr
->sh_size
);
4799 if (contents
== NULL
)
4801 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
4802 || bfd_read ((PTR
) contents
, 1, hdr
->sh_size
, abfd
) != hdr
->sh_size
)
4805 /* We know the number of entries in the section but not the maximum
4806 index. Therefore we have to run through all entries and find
4808 everdef
= (Elf_External_Verdef
*) contents
;
4810 for (i
= 0; i
< hdr
->sh_info
; ++i
)
4812 _bfd_elf_swap_verdef_in (abfd
, everdef
, &iverdefmem
);
4814 if ((iverdefmem
.vd_ndx
& ((unsigned) VERSYM_VERSION
)) > maxidx
)
4815 maxidx
= iverdefmem
.vd_ndx
& ((unsigned) VERSYM_VERSION
);
4817 everdef
= ((Elf_External_Verdef
*)
4818 ((bfd_byte
*) everdef
+ iverdefmem
.vd_next
));
4821 elf_tdata (abfd
)->verdef
=
4822 ((Elf_Internal_Verdef
*)
4823 bfd_zalloc (abfd
, maxidx
* sizeof (Elf_Internal_Verdef
)));
4824 if (elf_tdata (abfd
)->verdef
== NULL
)
4827 elf_tdata (abfd
)->cverdefs
= maxidx
;
4829 everdef
= (Elf_External_Verdef
*) contents
;
4830 iverdefarr
= elf_tdata (abfd
)->verdef
;
4831 for (i
= 0; i
< hdr
->sh_info
; i
++)
4833 Elf_External_Verdaux
*everdaux
;
4834 Elf_Internal_Verdaux
*iverdaux
;
4837 _bfd_elf_swap_verdef_in (abfd
, everdef
, &iverdefmem
);
4839 iverdef
= &iverdefarr
[(iverdefmem
.vd_ndx
& VERSYM_VERSION
) - 1];
4840 memcpy (iverdef
, &iverdefmem
, sizeof (Elf_Internal_Verdef
));
4842 iverdef
->vd_bfd
= abfd
;
4844 iverdef
->vd_auxptr
= ((Elf_Internal_Verdaux
*)
4847 * sizeof (Elf_Internal_Verdaux
))));
4848 if (iverdef
->vd_auxptr
== NULL
)
4851 everdaux
= ((Elf_External_Verdaux
*)
4852 ((bfd_byte
*) everdef
+ iverdef
->vd_aux
));
4853 iverdaux
= iverdef
->vd_auxptr
;
4854 for (j
= 0; j
< iverdef
->vd_cnt
; j
++, iverdaux
++)
4856 _bfd_elf_swap_verdaux_in (abfd
, everdaux
, iverdaux
);
4858 iverdaux
->vda_nodename
=
4859 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
4860 iverdaux
->vda_name
);
4861 if (iverdaux
->vda_nodename
== NULL
)
4864 if (j
+ 1 < iverdef
->vd_cnt
)
4865 iverdaux
->vda_nextptr
= iverdaux
+ 1;
4867 iverdaux
->vda_nextptr
= NULL
;
4869 everdaux
= ((Elf_External_Verdaux
*)
4870 ((bfd_byte
*) everdaux
+ iverdaux
->vda_next
));
4873 iverdef
->vd_nodename
= iverdef
->vd_auxptr
->vda_nodename
;
4875 if (i
+ 1 < hdr
->sh_info
)
4876 iverdef
->vd_nextdef
= iverdef
+ 1;
4878 iverdef
->vd_nextdef
= NULL
;
4880 everdef
= ((Elf_External_Verdef
*)
4881 ((bfd_byte
*) everdef
+ iverdef
->vd_next
));
4888 if (elf_dynverref (abfd
) != 0)
4890 Elf_Internal_Shdr
*hdr
;
4891 Elf_External_Verneed
*everneed
;
4892 Elf_Internal_Verneed
*iverneed
;
4895 hdr
= &elf_tdata (abfd
)->dynverref_hdr
;
4897 elf_tdata (abfd
)->verref
=
4898 ((Elf_Internal_Verneed
*)
4899 bfd_zalloc (abfd
, hdr
->sh_info
* sizeof (Elf_Internal_Verneed
)));
4900 if (elf_tdata (abfd
)->verref
== NULL
)
4903 elf_tdata (abfd
)->cverrefs
= hdr
->sh_info
;
4905 contents
= (bfd_byte
*) bfd_malloc (hdr
->sh_size
);
4906 if (contents
== NULL
)
4908 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
4909 || bfd_read ((PTR
) contents
, 1, hdr
->sh_size
, abfd
) != hdr
->sh_size
)
4912 everneed
= (Elf_External_Verneed
*) contents
;
4913 iverneed
= elf_tdata (abfd
)->verref
;
4914 for (i
= 0; i
< hdr
->sh_info
; i
++, iverneed
++)
4916 Elf_External_Vernaux
*evernaux
;
4917 Elf_Internal_Vernaux
*ivernaux
;
4920 _bfd_elf_swap_verneed_in (abfd
, everneed
, iverneed
);
4922 iverneed
->vn_bfd
= abfd
;
4924 iverneed
->vn_filename
=
4925 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
4927 if (iverneed
->vn_filename
== NULL
)
4930 iverneed
->vn_auxptr
=
4931 ((Elf_Internal_Vernaux
*)
4933 iverneed
->vn_cnt
* sizeof (Elf_Internal_Vernaux
)));
4935 evernaux
= ((Elf_External_Vernaux
*)
4936 ((bfd_byte
*) everneed
+ iverneed
->vn_aux
));
4937 ivernaux
= iverneed
->vn_auxptr
;
4938 for (j
= 0; j
< iverneed
->vn_cnt
; j
++, ivernaux
++)
4940 _bfd_elf_swap_vernaux_in (abfd
, evernaux
, ivernaux
);
4942 ivernaux
->vna_nodename
=
4943 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
4944 ivernaux
->vna_name
);
4945 if (ivernaux
->vna_nodename
== NULL
)
4948 if (j
+ 1 < iverneed
->vn_cnt
)
4949 ivernaux
->vna_nextptr
= ivernaux
+ 1;
4951 ivernaux
->vna_nextptr
= NULL
;
4953 evernaux
= ((Elf_External_Vernaux
*)
4954 ((bfd_byte
*) evernaux
+ ivernaux
->vna_next
));
4957 if (i
+ 1 < hdr
->sh_info
)
4958 iverneed
->vn_nextref
= iverneed
+ 1;
4960 iverneed
->vn_nextref
= NULL
;
4962 everneed
= ((Elf_External_Verneed
*)
4963 ((bfd_byte
*) everneed
+ iverneed
->vn_next
));
4973 if (contents
== NULL
)
4979 _bfd_elf_make_empty_symbol (abfd
)
4982 elf_symbol_type
*newsym
;
4984 newsym
= (elf_symbol_type
*) bfd_zalloc (abfd
, sizeof (elf_symbol_type
));
4989 newsym
->symbol
.the_bfd
= abfd
;
4990 return &newsym
->symbol
;
4995 _bfd_elf_get_symbol_info (ignore_abfd
, symbol
, ret
)
4996 bfd
*ignore_abfd ATTRIBUTE_UNUSED
;
5000 bfd_symbol_info (symbol
, ret
);
5003 /* Return whether a symbol name implies a local symbol. Most targets
5004 use this function for the is_local_label_name entry point, but some
5008 _bfd_elf_is_local_label_name (abfd
, name
)
5009 bfd
*abfd ATTRIBUTE_UNUSED
;
5012 /* Normal local symbols start with ``.L''. */
5013 if (name
[0] == '.' && name
[1] == 'L')
5016 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
5017 DWARF debugging symbols starting with ``..''. */
5018 if (name
[0] == '.' && name
[1] == '.')
5021 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
5022 emitting DWARF debugging output. I suspect this is actually a
5023 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
5024 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
5025 underscore to be emitted on some ELF targets). For ease of use,
5026 we treat such symbols as local. */
5027 if (name
[0] == '_' && name
[1] == '.' && name
[2] == 'L' && name
[3] == '_')
5034 _bfd_elf_get_lineno (ignore_abfd
, symbol
)
5035 bfd
*ignore_abfd ATTRIBUTE_UNUSED
;
5036 asymbol
*symbol ATTRIBUTE_UNUSED
;
5043 _bfd_elf_set_arch_mach (abfd
, arch
, machine
)
5045 enum bfd_architecture arch
;
5046 unsigned long machine
;
5048 /* If this isn't the right architecture for this backend, and this
5049 isn't the generic backend, fail. */
5050 if (arch
!= get_elf_backend_data (abfd
)->arch
5051 && arch
!= bfd_arch_unknown
5052 && get_elf_backend_data (abfd
)->arch
!= bfd_arch_unknown
)
5055 return bfd_default_set_arch_mach (abfd
, arch
, machine
);
5058 /* Find the function to a particular section and offset,
5059 for error reporting. */
5062 elf_find_function (abfd
, section
, symbols
, offset
,
5063 filename_ptr
, functionname_ptr
)
5064 bfd
*abfd ATTRIBUTE_UNUSED
;
5068 const char **filename_ptr
;
5069 const char **functionname_ptr
;
5071 const char *filename
;
5080 for (p
= symbols
; *p
!= NULL
; p
++)
5084 q
= (elf_symbol_type
*) *p
;
5086 if (bfd_get_section (&q
->symbol
) != section
)
5089 switch (ELF_ST_TYPE (q
->internal_elf_sym
.st_info
))
5094 filename
= bfd_asymbol_name (&q
->symbol
);
5098 if (q
->symbol
.section
== section
5099 && q
->symbol
.value
>= low_func
5100 && q
->symbol
.value
<= offset
)
5102 func
= (asymbol
*) q
;
5103 low_func
= q
->symbol
.value
;
5113 *filename_ptr
= filename
;
5114 if (functionname_ptr
)
5115 *functionname_ptr
= bfd_asymbol_name (func
);
5120 /* Find the nearest line to a particular section and offset,
5121 for error reporting. */
5124 _bfd_elf_find_nearest_line (abfd
, section
, symbols
, offset
,
5125 filename_ptr
, functionname_ptr
, line_ptr
)
5130 const char **filename_ptr
;
5131 const char **functionname_ptr
;
5132 unsigned int *line_ptr
;
5136 if (_bfd_dwarf1_find_nearest_line (abfd
, section
, symbols
, offset
,
5137 filename_ptr
, functionname_ptr
,
5140 if (!*functionname_ptr
)
5141 elf_find_function (abfd
, section
, symbols
, offset
,
5142 *filename_ptr
? NULL
: filename_ptr
,
5148 if (_bfd_dwarf2_find_nearest_line (abfd
, section
, symbols
, offset
,
5149 filename_ptr
, functionname_ptr
,
5151 &elf_tdata (abfd
)->dwarf2_find_line_info
))
5153 if (!*functionname_ptr
)
5154 elf_find_function (abfd
, section
, symbols
, offset
,
5155 *filename_ptr
? NULL
: filename_ptr
,
5161 if (! _bfd_stab_section_find_nearest_line (abfd
, symbols
, section
, offset
,
5162 &found
, filename_ptr
,
5163 functionname_ptr
, line_ptr
,
5164 &elf_tdata (abfd
)->line_info
))
5169 if (symbols
== NULL
)
5172 if (! elf_find_function (abfd
, section
, symbols
, offset
,
5173 filename_ptr
, functionname_ptr
))
5181 _bfd_elf_sizeof_headers (abfd
, reloc
)
5187 ret
= get_elf_backend_data (abfd
)->s
->sizeof_ehdr
;
5189 ret
+= get_program_header_size (abfd
);
5194 _bfd_elf_set_section_contents (abfd
, section
, location
, offset
, count
)
5199 bfd_size_type count
;
5201 Elf_Internal_Shdr
*hdr
;
5203 if (! abfd
->output_has_begun
5204 && ! _bfd_elf_compute_section_file_positions
5205 (abfd
, (struct bfd_link_info
*) NULL
))
5208 hdr
= &elf_section_data (section
)->this_hdr
;
5210 if (bfd_seek (abfd
, hdr
->sh_offset
+ offset
, SEEK_SET
) == -1)
5212 if (bfd_write (location
, 1, count
, abfd
) != count
)
5219 _bfd_elf_no_info_to_howto (abfd
, cache_ptr
, dst
)
5220 bfd
*abfd ATTRIBUTE_UNUSED
;
5221 arelent
*cache_ptr ATTRIBUTE_UNUSED
;
5222 Elf_Internal_Rela
*dst ATTRIBUTE_UNUSED
;
5229 _bfd_elf_no_info_to_howto_rel (abfd
, cache_ptr
, dst
)
5232 Elf_Internal_Rel
*dst
;
5238 /* Try to convert a non-ELF reloc into an ELF one. */
5241 _bfd_elf_validate_reloc (abfd
, areloc
)
5245 /* Check whether we really have an ELF howto. */
5247 if ((*areloc
->sym_ptr_ptr
)->the_bfd
->xvec
!= abfd
->xvec
)
5249 bfd_reloc_code_real_type code
;
5250 reloc_howto_type
*howto
;
5252 /* Alien reloc: Try to determine its type to replace it with an
5253 equivalent ELF reloc. */
5255 if (areloc
->howto
->pc_relative
)
5257 switch (areloc
->howto
->bitsize
)
5260 code
= BFD_RELOC_8_PCREL
;
5263 code
= BFD_RELOC_12_PCREL
;
5266 code
= BFD_RELOC_16_PCREL
;
5269 code
= BFD_RELOC_24_PCREL
;
5272 code
= BFD_RELOC_32_PCREL
;
5275 code
= BFD_RELOC_64_PCREL
;
5281 howto
= bfd_reloc_type_lookup (abfd
, code
);
5283 if (areloc
->howto
->pcrel_offset
!= howto
->pcrel_offset
)
5285 if (howto
->pcrel_offset
)
5286 areloc
->addend
+= areloc
->address
;
5288 areloc
->addend
-= areloc
->address
; /* addend is unsigned!! */
5293 switch (areloc
->howto
->bitsize
)
5299 code
= BFD_RELOC_14
;
5302 code
= BFD_RELOC_16
;
5305 code
= BFD_RELOC_26
;
5308 code
= BFD_RELOC_32
;
5311 code
= BFD_RELOC_64
;
5317 howto
= bfd_reloc_type_lookup (abfd
, code
);
5321 areloc
->howto
= howto
;
5329 (*_bfd_error_handler
)
5330 (_("%s: unsupported relocation type %s"),
5331 bfd_get_filename (abfd
), areloc
->howto
->name
);
5332 bfd_set_error (bfd_error_bad_value
);
5337 _bfd_elf_close_and_cleanup (abfd
)
5340 if (bfd_get_format (abfd
) == bfd_object
)
5342 if (elf_shstrtab (abfd
) != NULL
)
5343 _bfd_stringtab_free (elf_shstrtab (abfd
));
5346 return _bfd_generic_close_and_cleanup (abfd
);
5349 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
5350 in the relocation's offset. Thus we cannot allow any sort of sanity
5351 range-checking to interfere. There is nothing else to do in processing
5354 bfd_reloc_status_type
5355 _bfd_elf_rel_vtable_reloc_fn (abfd
, re
, symbol
, data
, is
, obfd
, errmsg
)
5356 bfd
*abfd ATTRIBUTE_UNUSED
;
5357 arelent
*re ATTRIBUTE_UNUSED
;
5358 struct symbol_cache_entry
*symbol ATTRIBUTE_UNUSED
;
5359 PTR data ATTRIBUTE_UNUSED
;
5360 asection
*is ATTRIBUTE_UNUSED
;
5361 bfd
*obfd ATTRIBUTE_UNUSED
;
5362 char **errmsg ATTRIBUTE_UNUSED
;
5364 return bfd_reloc_ok
;
5367 /* Elf core file support. Much of this only works on native
5368 toolchains, since we rely on knowing the
5369 machine-dependent procfs structure in order to pick
5370 out details about the corefile. */
5372 #ifdef HAVE_SYS_PROCFS_H
5373 # include <sys/procfs.h>
5376 /* FIXME: this is kinda wrong, but it's what gdb wants. */
5379 elfcore_make_pid (abfd
)
5382 return ((elf_tdata (abfd
)->core_lwpid
<< 16)
5383 + (elf_tdata (abfd
)->core_pid
));
5386 /* If there isn't a section called NAME, make one, using
5387 data from SECT. Note, this function will generate a
5388 reference to NAME, so you shouldn't deallocate or
5392 elfcore_maybe_make_sect (abfd
, name
, sect
)
5399 if (bfd_get_section_by_name (abfd
, name
) != NULL
)
5402 sect2
= bfd_make_section (abfd
, name
);
5406 sect2
->_raw_size
= sect
->_raw_size
;
5407 sect2
->filepos
= sect
->filepos
;
5408 sect2
->flags
= sect
->flags
;
5409 sect2
->alignment_power
= sect
->alignment_power
;
5413 /* Create a pseudosection containing SIZE bytes at FILEPOS. This
5414 actually creates up to two pseudosections:
5415 - For the single-threaded case, a section named NAME, unless
5416 such a section already exists.
5417 - For the multi-threaded case, a section named "NAME/PID", where
5418 PID is elfcore_make_pid (abfd).
5419 Both pseudosections have identical contents. */
5421 _bfd_elfcore_make_pseudosection (abfd
, name
, size
, filepos
)
5428 char *threaded_name
;
5431 /* Build the section name. */
5433 sprintf (buf
, "%s/%d", name
, elfcore_make_pid (abfd
));
5434 threaded_name
= bfd_alloc (abfd
, strlen (buf
) + 1);
5435 if (threaded_name
== NULL
)
5437 strcpy (threaded_name
, buf
);
5439 sect
= bfd_make_section (abfd
, threaded_name
);
5442 sect
->_raw_size
= size
;
5443 sect
->filepos
= filepos
;
5444 sect
->flags
= SEC_HAS_CONTENTS
;
5445 sect
->alignment_power
= 2;
5447 return elfcore_maybe_make_sect (abfd
, name
, sect
);
5450 /* prstatus_t exists on:
5452 linux 2.[01] + glibc
5456 #if defined (HAVE_PRSTATUS_T)
5457 static boolean elfcore_grok_prstatus
PARAMS ((bfd
*, Elf_Internal_Note
*));
5460 elfcore_grok_prstatus (abfd
, note
)
5462 Elf_Internal_Note
*note
;
5467 if (note
->descsz
== sizeof (prstatus_t
))
5471 raw_size
= sizeof (prstat
.pr_reg
);
5472 offset
= offsetof (prstatus_t
, pr_reg
);
5473 memcpy (&prstat
, note
->descdata
, sizeof (prstat
));
5475 elf_tdata (abfd
)->core_signal
= prstat
.pr_cursig
;
5476 elf_tdata (abfd
)->core_pid
= prstat
.pr_pid
;
5478 /* pr_who exists on:
5481 pr_who doesn't exist on:
5484 #if defined (HAVE_PRSTATUS_T_PR_WHO)
5485 elf_tdata (abfd
)->core_lwpid
= prstat
.pr_who
;
5488 #if defined (HAVE_PRSTATUS32_T)
5489 else if (note
->descsz
== sizeof (prstatus32_t
))
5491 /* 64-bit host, 32-bit corefile */
5492 prstatus32_t prstat
;
5494 raw_size
= sizeof (prstat
.pr_reg
);
5495 offset
= offsetof (prstatus32_t
, pr_reg
);
5496 memcpy (&prstat
, note
->descdata
, sizeof (prstat
));
5498 elf_tdata (abfd
)->core_signal
= prstat
.pr_cursig
;
5499 elf_tdata (abfd
)->core_pid
= prstat
.pr_pid
;
5501 /* pr_who exists on:
5504 pr_who doesn't exist on:
5507 #if defined (HAVE_PRSTATUS32_T_PR_WHO)
5508 elf_tdata (abfd
)->core_lwpid
= prstat
.pr_who
;
5511 #endif /* HAVE_PRSTATUS32_T */
5514 /* Fail - we don't know how to handle any other
5515 note size (ie. data object type). */
5519 /* Make a ".reg/999" section and a ".reg" section. */
5520 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
5521 raw_size
, note
->descpos
+ offset
);
5523 #endif /* defined (HAVE_PRSTATUS_T) */
5525 /* Create a pseudosection containing the exact contents of NOTE. */
5527 elfcore_make_note_pseudosection (abfd
, name
, note
)
5530 Elf_Internal_Note
*note
;
5532 return _bfd_elfcore_make_pseudosection (abfd
, name
,
5533 note
->descsz
, note
->descpos
);
5536 /* There isn't a consistent prfpregset_t across platforms,
5537 but it doesn't matter, because we don't have to pick this
5538 data structure apart. */
5541 elfcore_grok_prfpreg (abfd
, note
)
5543 Elf_Internal_Note
*note
;
5545 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
5548 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
5549 type of 5 (NT_PRXFPREG). Just include the whole note's contents
5553 elfcore_grok_prxfpreg (abfd
, note
)
5555 Elf_Internal_Note
*note
;
5557 return elfcore_make_note_pseudosection (abfd
, ".reg-xfp", note
);
5560 #if defined (HAVE_PRPSINFO_T)
5561 typedef prpsinfo_t elfcore_psinfo_t
;
5562 #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
5563 typedef prpsinfo32_t elfcore_psinfo32_t
;
5567 #if defined (HAVE_PSINFO_T)
5568 typedef psinfo_t elfcore_psinfo_t
;
5569 #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
5570 typedef psinfo32_t elfcore_psinfo32_t
;
5574 /* return a malloc'ed copy of a string at START which is at
5575 most MAX bytes long, possibly without a terminating '\0'.
5576 the copy will always have a terminating '\0'. */
5579 _bfd_elfcore_strndup (abfd
, start
, max
)
5585 char *end
= memchr (start
, '\0', max
);
5593 dup
= bfd_alloc (abfd
, len
+ 1);
5597 memcpy (dup
, start
, len
);
5603 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
5604 static boolean elfcore_grok_psinfo
PARAMS ((bfd
*, Elf_Internal_Note
*));
5607 elfcore_grok_psinfo (abfd
, note
)
5609 Elf_Internal_Note
*note
;
5611 if (note
->descsz
== sizeof (elfcore_psinfo_t
))
5613 elfcore_psinfo_t psinfo
;
5615 memcpy (&psinfo
, note
->descdata
, sizeof (psinfo
));
5617 elf_tdata (abfd
)->core_program
5618 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_fname
,
5619 sizeof (psinfo
.pr_fname
));
5621 elf_tdata (abfd
)->core_command
5622 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_psargs
,
5623 sizeof (psinfo
.pr_psargs
));
5625 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
5626 else if (note
->descsz
== sizeof (elfcore_psinfo32_t
))
5628 /* 64-bit host, 32-bit corefile */
5629 elfcore_psinfo32_t psinfo
;
5631 memcpy (&psinfo
, note
->descdata
, sizeof (psinfo
));
5633 elf_tdata (abfd
)->core_program
5634 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_fname
,
5635 sizeof (psinfo
.pr_fname
));
5637 elf_tdata (abfd
)->core_command
5638 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_psargs
,
5639 sizeof (psinfo
.pr_psargs
));
5645 /* Fail - we don't know how to handle any other
5646 note size (ie. data object type). */
5650 /* Note that for some reason, a spurious space is tacked
5651 onto the end of the args in some (at least one anyway)
5652 implementations, so strip it off if it exists. */
5655 char *command
= elf_tdata (abfd
)->core_command
;
5656 int n
= strlen (command
);
5658 if (0 < n
&& command
[n
- 1] == ' ')
5659 command
[n
- 1] = '\0';
5664 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
5666 #if defined (HAVE_PSTATUS_T)
5668 elfcore_grok_pstatus (abfd
, note
)
5670 Elf_Internal_Note
*note
;
5672 if (note
->descsz
== sizeof (pstatus_t
)
5673 #if defined (HAVE_PXSTATUS_T)
5674 || note
->descsz
== sizeof (pxstatus_t
)
5680 memcpy (&pstat
, note
->descdata
, sizeof (pstat
));
5682 elf_tdata (abfd
)->core_pid
= pstat
.pr_pid
;
5684 #if defined (HAVE_PSTATUS32_T)
5685 else if (note
->descsz
== sizeof (pstatus32_t
))
5687 /* 64-bit host, 32-bit corefile */
5690 memcpy (&pstat
, note
->descdata
, sizeof (pstat
));
5692 elf_tdata (abfd
)->core_pid
= pstat
.pr_pid
;
5695 /* Could grab some more details from the "representative"
5696 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
5697 NT_LWPSTATUS note, presumably. */
5701 #endif /* defined (HAVE_PSTATUS_T) */
5703 #if defined (HAVE_LWPSTATUS_T)
5705 elfcore_grok_lwpstatus (abfd
, note
)
5707 Elf_Internal_Note
*note
;
5709 lwpstatus_t lwpstat
;
5714 if (note
->descsz
!= sizeof (lwpstat
)
5715 #if defined (HAVE_LWPXSTATUS_T)
5716 && note
->descsz
!= sizeof (lwpxstatus_t
)
5721 memcpy (&lwpstat
, note
->descdata
, sizeof (lwpstat
));
5723 elf_tdata (abfd
)->core_lwpid
= lwpstat
.pr_lwpid
;
5724 elf_tdata (abfd
)->core_signal
= lwpstat
.pr_cursig
;
5726 /* Make a ".reg/999" section. */
5728 sprintf (buf
, ".reg/%d", elfcore_make_pid (abfd
));
5729 name
= bfd_alloc (abfd
, strlen (buf
) + 1);
5734 sect
= bfd_make_section (abfd
, name
);
5738 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
5739 sect
->_raw_size
= sizeof (lwpstat
.pr_context
.uc_mcontext
.gregs
);
5740 sect
->filepos
= note
->descpos
5741 + offsetof (lwpstatus_t
, pr_context
.uc_mcontext
.gregs
);
5744 #if defined (HAVE_LWPSTATUS_T_PR_REG)
5745 sect
->_raw_size
= sizeof (lwpstat
.pr_reg
);
5746 sect
->filepos
= note
->descpos
+ offsetof (lwpstatus_t
, pr_reg
);
5749 sect
->flags
= SEC_HAS_CONTENTS
;
5750 sect
->alignment_power
= 2;
5752 if (!elfcore_maybe_make_sect (abfd
, ".reg", sect
))
5755 /* Make a ".reg2/999" section */
5757 sprintf (buf
, ".reg2/%d", elfcore_make_pid (abfd
));
5758 name
= bfd_alloc (abfd
, strlen (buf
) + 1);
5763 sect
= bfd_make_section (abfd
, name
);
5767 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
5768 sect
->_raw_size
= sizeof (lwpstat
.pr_context
.uc_mcontext
.fpregs
);
5769 sect
->filepos
= note
->descpos
5770 + offsetof (lwpstatus_t
, pr_context
.uc_mcontext
.fpregs
);
5773 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
5774 sect
->_raw_size
= sizeof (lwpstat
.pr_fpreg
);
5775 sect
->filepos
= note
->descpos
+ offsetof (lwpstatus_t
, pr_fpreg
);
5778 sect
->flags
= SEC_HAS_CONTENTS
;
5779 sect
->alignment_power
= 2;
5781 return elfcore_maybe_make_sect (abfd
, ".reg2", sect
);
5783 #endif /* defined (HAVE_LWPSTATUS_T) */
5785 #if defined (HAVE_WIN32_PSTATUS_T)
5787 elfcore_grok_win32pstatus (abfd
, note
)
5789 Elf_Internal_Note
*note
;
5794 win32_pstatus_t pstatus
;
5796 if (note
->descsz
< sizeof (pstatus
))
5799 memcpy (&pstatus
, note
->descdata
, note
->descsz
);
5801 switch (pstatus
.data_type
)
5803 case NOTE_INFO_PROCESS
:
5804 /* FIXME: need to add ->core_command. */
5805 elf_tdata (abfd
)->core_signal
= pstatus
.data
.process_info
.signal
;
5806 elf_tdata (abfd
)->core_pid
= pstatus
.data
.process_info
.pid
;
5809 case NOTE_INFO_THREAD
:
5810 /* Make a ".reg/999" section. */
5811 sprintf (buf
, ".reg/%d", pstatus
.data
.thread_info
.tid
);
5813 name
= bfd_alloc (abfd
, strlen (buf
) + 1);
5819 sect
= bfd_make_section (abfd
, name
);
5823 sect
->_raw_size
= sizeof (pstatus
.data
.thread_info
.thread_context
);
5824 sect
->filepos
= note
->descpos
+ offsetof (struct win32_pstatus
,
5825 data
.thread_info
.thread_context
);
5826 sect
->flags
= SEC_HAS_CONTENTS
;
5827 sect
->alignment_power
= 2;
5829 if (pstatus
.data
.thread_info
.is_active_thread
)
5830 if (! elfcore_maybe_make_sect (abfd
, ".reg", sect
))
5834 case NOTE_INFO_MODULE
:
5835 /* Make a ".module/xxxxxxxx" section. */
5836 sprintf (buf
, ".module/%08x", pstatus
.data
.module_info
.base_address
);
5838 name
= bfd_alloc (abfd
, strlen (buf
) + 1);
5844 sect
= bfd_make_section (abfd
, name
);
5849 sect
->_raw_size
= note
->descsz
;
5850 sect
->filepos
= note
->descpos
;
5851 sect
->flags
= SEC_HAS_CONTENTS
;
5852 sect
->alignment_power
= 2;
5861 #endif /* HAVE_WIN32_PSTATUS_T */
5864 elfcore_grok_note (abfd
, note
)
5866 Elf_Internal_Note
*note
;
5868 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
5876 if (bed
->elf_backend_grok_prstatus
)
5877 if ((*bed
->elf_backend_grok_prstatus
) (abfd
, note
))
5879 #if defined (HAVE_PRSTATUS_T)
5880 return elfcore_grok_prstatus (abfd
, note
);
5885 #if defined (HAVE_PSTATUS_T)
5887 return elfcore_grok_pstatus (abfd
, note
);
5890 #if defined (HAVE_LWPSTATUS_T)
5892 return elfcore_grok_lwpstatus (abfd
, note
);
5895 case NT_FPREGSET
: /* FIXME: rename to NT_PRFPREG */
5896 return elfcore_grok_prfpreg (abfd
, note
);
5898 #if defined (HAVE_WIN32_PSTATUS_T)
5899 case NT_WIN32PSTATUS
:
5900 return elfcore_grok_win32pstatus (abfd
, note
);
5903 case NT_PRXFPREG
: /* Linux SSE extension */
5904 if (note
->namesz
== 5
5905 && ! strcmp (note
->namedata
, "LINUX"))
5906 return elfcore_grok_prxfpreg (abfd
, note
);
5912 if (bed
->elf_backend_grok_psinfo
)
5913 if ((*bed
->elf_backend_grok_psinfo
) (abfd
, note
))
5915 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
5916 return elfcore_grok_psinfo (abfd
, note
);
5924 elfcore_read_notes (abfd
, offset
, size
)
5935 if (bfd_seek (abfd
, offset
, SEEK_SET
) == -1)
5938 buf
= bfd_malloc ((size_t) size
);
5942 if (bfd_read (buf
, size
, 1, abfd
) != size
)
5950 while (p
< buf
+ size
)
5952 /* FIXME: bad alignment assumption. */
5953 Elf_External_Note
*xnp
= (Elf_External_Note
*) p
;
5954 Elf_Internal_Note in
;
5956 in
.type
= bfd_h_get_32 (abfd
, (bfd_byte
*) xnp
->type
);
5958 in
.namesz
= bfd_h_get_32 (abfd
, (bfd_byte
*) xnp
->namesz
);
5959 in
.namedata
= xnp
->name
;
5961 in
.descsz
= bfd_h_get_32 (abfd
, (bfd_byte
*) xnp
->descsz
);
5962 in
.descdata
= in
.namedata
+ BFD_ALIGN (in
.namesz
, 4);
5963 in
.descpos
= offset
+ (in
.descdata
- buf
);
5965 if (! elfcore_grok_note (abfd
, &in
))
5968 p
= in
.descdata
+ BFD_ALIGN (in
.descsz
, 4);
5975 /* Providing external access to the ELF program header table. */
5977 /* Return an upper bound on the number of bytes required to store a
5978 copy of ABFD's program header table entries. Return -1 if an error
5979 occurs; bfd_get_error will return an appropriate code. */
5982 bfd_get_elf_phdr_upper_bound (abfd
)
5985 if (abfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
5987 bfd_set_error (bfd_error_wrong_format
);
5991 return elf_elfheader (abfd
)->e_phnum
* sizeof (Elf_Internal_Phdr
);
5994 /* Copy ABFD's program header table entries to *PHDRS. The entries
5995 will be stored as an array of Elf_Internal_Phdr structures, as
5996 defined in include/elf/internal.h. To find out how large the
5997 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
5999 Return the number of program header table entries read, or -1 if an
6000 error occurs; bfd_get_error will return an appropriate code. */
6003 bfd_get_elf_phdrs (abfd
, phdrs
)
6009 if (abfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
6011 bfd_set_error (bfd_error_wrong_format
);
6015 num_phdrs
= elf_elfheader (abfd
)->e_phnum
;
6016 memcpy (phdrs
, elf_tdata (abfd
)->phdr
,
6017 num_phdrs
* sizeof (Elf_Internal_Phdr
));
6023 _bfd_elf_sprintf_vma (abfd
, buf
, value
)
6024 bfd
*abfd ATTRIBUTE_UNUSED
;
6029 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
6031 i_ehdrp
= elf_elfheader (abfd
);
6032 if (i_ehdrp
== NULL
)
6033 sprintf_vma (buf
, value
);
6036 if (i_ehdrp
->e_ident
[EI_CLASS
] == ELFCLASS64
)
6038 #if BFD_HOST_64BIT_LONG
6039 sprintf (buf
, "%016lx", value
);
6041 sprintf (buf
, "%08lx%08lx", _bfd_int64_high (value
),
6042 _bfd_int64_low (value
));
6046 sprintf (buf
, "%08lx", (unsigned long) (value
& 0xffffffff));
6049 sprintf_vma (buf
, value
);
6054 _bfd_elf_fprintf_vma (abfd
, stream
, value
)
6055 bfd
*abfd ATTRIBUTE_UNUSED
;
6060 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
6062 i_ehdrp
= elf_elfheader (abfd
);
6063 if (i_ehdrp
== NULL
)
6064 fprintf_vma ((FILE *) stream
, value
);
6067 if (i_ehdrp
->e_ident
[EI_CLASS
] == ELFCLASS64
)
6069 #if BFD_HOST_64BIT_LONG
6070 fprintf ((FILE *) stream
, "%016lx", value
);
6072 fprintf ((FILE *) stream
, "%08lx%08lx",
6073 _bfd_int64_high (value
), _bfd_int64_low (value
));
6077 fprintf ((FILE *) stream
, "%08lx",
6078 (unsigned long) (value
& 0xffffffff));
6081 fprintf_vma ((FILE *) stream
, value
);
6085 enum elf_reloc_type_class
6086 _bfd_elf_reloc_type_class (type
)
6087 int type ATTRIBUTE_UNUSED
;
6089 return reloc_class_normal
;