1 /* ELF executable support for BFD.
2 Copyright 1993, 94, 95, 96, 97, 98, 99, 2000 Free Software Foundation, Inc.
4 This file is part of BFD, the Binary File Descriptor library.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
25 BFD support for ELF formats is being worked on.
26 Currently, the best supported back ends are for sparc and i386
27 (running svr4 or Solaris 2).
29 Documentation of the internals of the support code still needs
30 to be written. The code is changing quickly enough that we
34 /* For sparc64-cross-sparc32. */
43 static INLINE
struct elf_segment_map
*make_mapping
44 PARAMS ((bfd
*, asection
**, unsigned int, unsigned int, boolean
));
45 static boolean map_sections_to_segments
PARAMS ((bfd
*));
46 static int elf_sort_sections
PARAMS ((const PTR
, const PTR
));
47 static boolean assign_file_positions_for_segments
PARAMS ((bfd
*));
48 static boolean assign_file_positions_except_relocs
PARAMS ((bfd
*));
49 static boolean prep_headers
PARAMS ((bfd
*));
50 static boolean swap_out_syms
PARAMS ((bfd
*, struct bfd_strtab_hash
**, int));
51 static boolean copy_private_bfd_data
PARAMS ((bfd
*, bfd
*));
52 static char *elf_read
PARAMS ((bfd
*, long, unsigned int));
53 static void elf_fake_sections
PARAMS ((bfd
*, asection
*, PTR
));
54 static boolean assign_section_numbers
PARAMS ((bfd
*));
55 static INLINE
int sym_is_global
PARAMS ((bfd
*, asymbol
*));
56 static boolean elf_map_symbols
PARAMS ((bfd
*));
57 static bfd_size_type get_program_header_size
PARAMS ((bfd
*));
58 static boolean elfcore_read_notes
PARAMS ((bfd
*, bfd_vma
, bfd_vma
));
60 /* Swap version information in and out. The version information is
61 currently size independent. If that ever changes, this code will
62 need to move into elfcode.h. */
64 /* Swap in a Verdef structure. */
67 _bfd_elf_swap_verdef_in (abfd
, src
, dst
)
69 const Elf_External_Verdef
*src
;
70 Elf_Internal_Verdef
*dst
;
72 dst
->vd_version
= bfd_h_get_16 (abfd
, src
->vd_version
);
73 dst
->vd_flags
= bfd_h_get_16 (abfd
, src
->vd_flags
);
74 dst
->vd_ndx
= bfd_h_get_16 (abfd
, src
->vd_ndx
);
75 dst
->vd_cnt
= bfd_h_get_16 (abfd
, src
->vd_cnt
);
76 dst
->vd_hash
= bfd_h_get_32 (abfd
, src
->vd_hash
);
77 dst
->vd_aux
= bfd_h_get_32 (abfd
, src
->vd_aux
);
78 dst
->vd_next
= bfd_h_get_32 (abfd
, src
->vd_next
);
81 /* Swap out a Verdef structure. */
84 _bfd_elf_swap_verdef_out (abfd
, src
, dst
)
86 const Elf_Internal_Verdef
*src
;
87 Elf_External_Verdef
*dst
;
89 bfd_h_put_16 (abfd
, src
->vd_version
, dst
->vd_version
);
90 bfd_h_put_16 (abfd
, src
->vd_flags
, dst
->vd_flags
);
91 bfd_h_put_16 (abfd
, src
->vd_ndx
, dst
->vd_ndx
);
92 bfd_h_put_16 (abfd
, src
->vd_cnt
, dst
->vd_cnt
);
93 bfd_h_put_32 (abfd
, src
->vd_hash
, dst
->vd_hash
);
94 bfd_h_put_32 (abfd
, src
->vd_aux
, dst
->vd_aux
);
95 bfd_h_put_32 (abfd
, src
->vd_next
, dst
->vd_next
);
98 /* Swap in a Verdaux structure. */
101 _bfd_elf_swap_verdaux_in (abfd
, src
, dst
)
103 const Elf_External_Verdaux
*src
;
104 Elf_Internal_Verdaux
*dst
;
106 dst
->vda_name
= bfd_h_get_32 (abfd
, src
->vda_name
);
107 dst
->vda_next
= bfd_h_get_32 (abfd
, src
->vda_next
);
110 /* Swap out a Verdaux structure. */
113 _bfd_elf_swap_verdaux_out (abfd
, src
, dst
)
115 const Elf_Internal_Verdaux
*src
;
116 Elf_External_Verdaux
*dst
;
118 bfd_h_put_32 (abfd
, src
->vda_name
, dst
->vda_name
);
119 bfd_h_put_32 (abfd
, src
->vda_next
, dst
->vda_next
);
122 /* Swap in a Verneed structure. */
125 _bfd_elf_swap_verneed_in (abfd
, src
, dst
)
127 const Elf_External_Verneed
*src
;
128 Elf_Internal_Verneed
*dst
;
130 dst
->vn_version
= bfd_h_get_16 (abfd
, src
->vn_version
);
131 dst
->vn_cnt
= bfd_h_get_16 (abfd
, src
->vn_cnt
);
132 dst
->vn_file
= bfd_h_get_32 (abfd
, src
->vn_file
);
133 dst
->vn_aux
= bfd_h_get_32 (abfd
, src
->vn_aux
);
134 dst
->vn_next
= bfd_h_get_32 (abfd
, src
->vn_next
);
137 /* Swap out a Verneed structure. */
140 _bfd_elf_swap_verneed_out (abfd
, src
, dst
)
142 const Elf_Internal_Verneed
*src
;
143 Elf_External_Verneed
*dst
;
145 bfd_h_put_16 (abfd
, src
->vn_version
, dst
->vn_version
);
146 bfd_h_put_16 (abfd
, src
->vn_cnt
, dst
->vn_cnt
);
147 bfd_h_put_32 (abfd
, src
->vn_file
, dst
->vn_file
);
148 bfd_h_put_32 (abfd
, src
->vn_aux
, dst
->vn_aux
);
149 bfd_h_put_32 (abfd
, src
->vn_next
, dst
->vn_next
);
152 /* Swap in a Vernaux structure. */
155 _bfd_elf_swap_vernaux_in (abfd
, src
, dst
)
157 const Elf_External_Vernaux
*src
;
158 Elf_Internal_Vernaux
*dst
;
160 dst
->vna_hash
= bfd_h_get_32 (abfd
, src
->vna_hash
);
161 dst
->vna_flags
= bfd_h_get_16 (abfd
, src
->vna_flags
);
162 dst
->vna_other
= bfd_h_get_16 (abfd
, src
->vna_other
);
163 dst
->vna_name
= bfd_h_get_32 (abfd
, src
->vna_name
);
164 dst
->vna_next
= bfd_h_get_32 (abfd
, src
->vna_next
);
167 /* Swap out a Vernaux structure. */
170 _bfd_elf_swap_vernaux_out (abfd
, src
, dst
)
172 const Elf_Internal_Vernaux
*src
;
173 Elf_External_Vernaux
*dst
;
175 bfd_h_put_32 (abfd
, src
->vna_hash
, dst
->vna_hash
);
176 bfd_h_put_16 (abfd
, src
->vna_flags
, dst
->vna_flags
);
177 bfd_h_put_16 (abfd
, src
->vna_other
, dst
->vna_other
);
178 bfd_h_put_32 (abfd
, src
->vna_name
, dst
->vna_name
);
179 bfd_h_put_32 (abfd
, src
->vna_next
, dst
->vna_next
);
182 /* Swap in a Versym structure. */
185 _bfd_elf_swap_versym_in (abfd
, src
, dst
)
187 const Elf_External_Versym
*src
;
188 Elf_Internal_Versym
*dst
;
190 dst
->vs_vers
= bfd_h_get_16 (abfd
, src
->vs_vers
);
193 /* Swap out a Versym structure. */
196 _bfd_elf_swap_versym_out (abfd
, src
, dst
)
198 const Elf_Internal_Versym
*src
;
199 Elf_External_Versym
*dst
;
201 bfd_h_put_16 (abfd
, src
->vs_vers
, dst
->vs_vers
);
204 /* Standard ELF hash function. Do not change this function; you will
205 cause invalid hash tables to be generated. */
208 bfd_elf_hash (namearg
)
211 const unsigned char *name
= (const unsigned char *) namearg
;
216 while ((ch
= *name
++) != '\0')
219 if ((g
= (h
& 0xf0000000)) != 0)
222 /* The ELF ABI says `h &= ~g', but this is equivalent in
223 this case and on some machines one insn instead of two. */
230 /* Read a specified number of bytes at a specified offset in an ELF
231 file, into a newly allocated buffer, and return a pointer to the
235 elf_read (abfd
, offset
, size
)
242 if ((buf
= bfd_alloc (abfd
, size
)) == NULL
)
244 if (bfd_seek (abfd
, offset
, SEEK_SET
) == -1)
246 if (bfd_read ((PTR
) buf
, size
, 1, abfd
) != size
)
248 if (bfd_get_error () != bfd_error_system_call
)
249 bfd_set_error (bfd_error_file_truncated
);
256 bfd_elf_mkobject (abfd
)
259 /* This just does initialization. */
260 /* coff_mkobject zalloc's space for tdata.coff_obj_data ... */
261 elf_tdata (abfd
) = (struct elf_obj_tdata
*)
262 bfd_zalloc (abfd
, sizeof (struct elf_obj_tdata
));
263 if (elf_tdata (abfd
) == 0)
265 /* Since everything is done at close time, do we need any
272 bfd_elf_mkcorefile (abfd
)
275 /* I think this can be done just like an object file. */
276 return bfd_elf_mkobject (abfd
);
280 bfd_elf_get_str_section (abfd
, shindex
)
282 unsigned int shindex
;
284 Elf_Internal_Shdr
**i_shdrp
;
285 char *shstrtab
= NULL
;
287 unsigned int shstrtabsize
;
289 i_shdrp
= elf_elfsections (abfd
);
290 if (i_shdrp
== 0 || i_shdrp
[shindex
] == 0)
293 shstrtab
= (char *) i_shdrp
[shindex
]->contents
;
294 if (shstrtab
== NULL
)
296 /* No cached one, attempt to read, and cache what we read. */
297 offset
= i_shdrp
[shindex
]->sh_offset
;
298 shstrtabsize
= i_shdrp
[shindex
]->sh_size
;
299 shstrtab
= elf_read (abfd
, offset
, shstrtabsize
);
300 i_shdrp
[shindex
]->contents
= (PTR
) shstrtab
;
306 bfd_elf_string_from_elf_section (abfd
, shindex
, strindex
)
308 unsigned int shindex
;
309 unsigned int strindex
;
311 Elf_Internal_Shdr
*hdr
;
316 hdr
= elf_elfsections (abfd
)[shindex
];
318 if (hdr
->contents
== NULL
319 && bfd_elf_get_str_section (abfd
, shindex
) == NULL
)
322 if (strindex
>= hdr
->sh_size
)
324 (*_bfd_error_handler
)
325 (_("%s: invalid string offset %u >= %lu for section `%s'"),
326 bfd_get_filename (abfd
), strindex
, (unsigned long) hdr
->sh_size
,
327 ((shindex
== elf_elfheader(abfd
)->e_shstrndx
328 && strindex
== hdr
->sh_name
)
330 : elf_string_from_elf_strtab (abfd
, hdr
->sh_name
)));
334 return ((char *) hdr
->contents
) + strindex
;
337 /* Make a BFD section from an ELF section. We store a pointer to the
338 BFD section in the bfd_section field of the header. */
341 _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
)
343 Elf_Internal_Shdr
*hdr
;
349 if (hdr
->bfd_section
!= NULL
)
351 BFD_ASSERT (strcmp (name
,
352 bfd_get_section_name (abfd
, hdr
->bfd_section
)) == 0);
356 newsect
= bfd_make_section_anyway (abfd
, name
);
360 newsect
->filepos
= hdr
->sh_offset
;
362 if (! bfd_set_section_vma (abfd
, newsect
, hdr
->sh_addr
)
363 || ! bfd_set_section_size (abfd
, newsect
, hdr
->sh_size
)
364 || ! bfd_set_section_alignment (abfd
, newsect
,
365 bfd_log2 (hdr
->sh_addralign
)))
368 flags
= SEC_NO_FLAGS
;
369 if (hdr
->sh_type
!= SHT_NOBITS
)
370 flags
|= SEC_HAS_CONTENTS
;
371 if ((hdr
->sh_flags
& SHF_ALLOC
) != 0)
374 if (hdr
->sh_type
!= SHT_NOBITS
)
377 if ((hdr
->sh_flags
& SHF_WRITE
) == 0)
378 flags
|= SEC_READONLY
;
379 if ((hdr
->sh_flags
& SHF_EXECINSTR
) != 0)
381 else if ((flags
& SEC_LOAD
) != 0)
384 /* The debugging sections appear to be recognized only by name, not
387 static const char *debug_sec_names
[] =
396 for (i
= sizeof (debug_sec_names
) / sizeof (debug_sec_names
[0]); i
--;)
397 if (strncmp (name
, debug_sec_names
[i
], strlen (debug_sec_names
[i
])) == 0)
401 flags
|= SEC_DEBUGGING
;
404 /* As a GNU extension, if the name begins with .gnu.linkonce, we
405 only link a single copy of the section. This is used to support
406 g++. g++ will emit each template expansion in its own section.
407 The symbols will be defined as weak, so that multiple definitions
408 are permitted. The GNU linker extension is to actually discard
409 all but one of the sections. */
410 if (strncmp (name
, ".gnu.linkonce", sizeof ".gnu.linkonce" - 1) == 0)
411 flags
|= SEC_LINK_ONCE
| SEC_LINK_DUPLICATES_DISCARD
;
413 if (! bfd_set_section_flags (abfd
, newsect
, flags
))
416 if ((flags
& SEC_ALLOC
) != 0)
418 Elf_Internal_Phdr
*phdr
;
421 /* Look through the phdrs to see if we need to adjust the lma.
422 If all the p_paddr fields are zero, we ignore them, since
423 some ELF linkers produce such output. */
424 phdr
= elf_tdata (abfd
)->phdr
;
425 for (i
= 0; i
< elf_elfheader (abfd
)->e_phnum
; i
++, phdr
++)
427 if (phdr
->p_paddr
!= 0)
430 if (i
< elf_elfheader (abfd
)->e_phnum
)
432 phdr
= elf_tdata (abfd
)->phdr
;
433 for (i
= 0; i
< elf_elfheader (abfd
)->e_phnum
; i
++, phdr
++)
435 if (phdr
->p_type
== PT_LOAD
436 && phdr
->p_vaddr
!= phdr
->p_paddr
437 && phdr
->p_vaddr
<= hdr
->sh_addr
438 && (phdr
->p_vaddr
+ phdr
->p_memsz
439 >= hdr
->sh_addr
+ hdr
->sh_size
)
440 && ((flags
& SEC_LOAD
) == 0
441 || (phdr
->p_offset
<= (bfd_vma
) hdr
->sh_offset
442 && (phdr
->p_offset
+ phdr
->p_filesz
443 >= hdr
->sh_offset
+ hdr
->sh_size
))))
445 newsect
->lma
+= phdr
->p_paddr
- phdr
->p_vaddr
;
452 hdr
->bfd_section
= newsect
;
453 elf_section_data (newsect
)->this_hdr
= *hdr
;
463 struct elf_internal_shdr *bfd_elf_find_section (bfd *abfd, char *name);
466 Helper functions for GDB to locate the string tables.
467 Since BFD hides string tables from callers, GDB needs to use an
468 internal hook to find them. Sun's .stabstr, in particular,
469 isn't even pointed to by the .stab section, so ordinary
470 mechanisms wouldn't work to find it, even if we had some.
473 struct elf_internal_shdr
*
474 bfd_elf_find_section (abfd
, name
)
478 Elf_Internal_Shdr
**i_shdrp
;
483 i_shdrp
= elf_elfsections (abfd
);
486 shstrtab
= bfd_elf_get_str_section
487 (abfd
, elf_elfheader (abfd
)->e_shstrndx
);
488 if (shstrtab
!= NULL
)
490 max
= elf_elfheader (abfd
)->e_shnum
;
491 for (i
= 1; i
< max
; i
++)
492 if (!strcmp (&shstrtab
[i_shdrp
[i
]->sh_name
], name
))
499 const char *const bfd_elf_section_type_names
[] = {
500 "SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB",
501 "SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE",
502 "SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM",
505 /* ELF relocs are against symbols. If we are producing relocateable
506 output, and the reloc is against an external symbol, and nothing
507 has given us any additional addend, the resulting reloc will also
508 be against the same symbol. In such a case, we don't want to
509 change anything about the way the reloc is handled, since it will
510 all be done at final link time. Rather than put special case code
511 into bfd_perform_relocation, all the reloc types use this howto
512 function. It just short circuits the reloc if producing
513 relocateable output against an external symbol. */
515 bfd_reloc_status_type
516 bfd_elf_generic_reloc (abfd
,
523 bfd
*abfd ATTRIBUTE_UNUSED
;
524 arelent
*reloc_entry
;
526 PTR data ATTRIBUTE_UNUSED
;
527 asection
*input_section
;
529 char **error_message ATTRIBUTE_UNUSED
;
531 if (output_bfd
!= (bfd
*) NULL
532 && (symbol
->flags
& BSF_SECTION_SYM
) == 0
533 && (! reloc_entry
->howto
->partial_inplace
534 || reloc_entry
->addend
== 0))
536 reloc_entry
->address
+= input_section
->output_offset
;
540 return bfd_reloc_continue
;
543 /* Print out the program headers. */
546 _bfd_elf_print_private_bfd_data (abfd
, farg
)
550 FILE *f
= (FILE *) farg
;
551 Elf_Internal_Phdr
*p
;
553 bfd_byte
*dynbuf
= NULL
;
555 p
= elf_tdata (abfd
)->phdr
;
560 fprintf (f
, _("\nProgram Header:\n"));
561 c
= elf_elfheader (abfd
)->e_phnum
;
562 for (i
= 0; i
< c
; i
++, p
++)
569 case PT_NULL
: s
= "NULL"; break;
570 case PT_LOAD
: s
= "LOAD"; break;
571 case PT_DYNAMIC
: s
= "DYNAMIC"; break;
572 case PT_INTERP
: s
= "INTERP"; break;
573 case PT_NOTE
: s
= "NOTE"; break;
574 case PT_SHLIB
: s
= "SHLIB"; break;
575 case PT_PHDR
: s
= "PHDR"; break;
576 default: sprintf (buf
, "0x%lx", p
->p_type
); s
= buf
; break;
578 fprintf (f
, "%8s off 0x", s
);
579 fprintf_vma (f
, p
->p_offset
);
580 fprintf (f
, " vaddr 0x");
581 fprintf_vma (f
, p
->p_vaddr
);
582 fprintf (f
, " paddr 0x");
583 fprintf_vma (f
, p
->p_paddr
);
584 fprintf (f
, " align 2**%u\n", bfd_log2 (p
->p_align
));
585 fprintf (f
, " filesz 0x");
586 fprintf_vma (f
, p
->p_filesz
);
587 fprintf (f
, " memsz 0x");
588 fprintf_vma (f
, p
->p_memsz
);
589 fprintf (f
, " flags %c%c%c",
590 (p
->p_flags
& PF_R
) != 0 ? 'r' : '-',
591 (p
->p_flags
& PF_W
) != 0 ? 'w' : '-',
592 (p
->p_flags
& PF_X
) != 0 ? 'x' : '-');
593 if ((p
->p_flags
&~ (PF_R
| PF_W
| PF_X
)) != 0)
594 fprintf (f
, " %lx", p
->p_flags
&~ (PF_R
| PF_W
| PF_X
));
599 s
= bfd_get_section_by_name (abfd
, ".dynamic");
604 bfd_byte
*extdyn
, *extdynend
;
606 void (*swap_dyn_in
) PARAMS ((bfd
*, const PTR
, Elf_Internal_Dyn
*));
608 fprintf (f
, _("\nDynamic Section:\n"));
610 dynbuf
= (bfd_byte
*) bfd_malloc (s
->_raw_size
);
613 if (! bfd_get_section_contents (abfd
, s
, (PTR
) dynbuf
, (file_ptr
) 0,
617 elfsec
= _bfd_elf_section_from_bfd_section (abfd
, s
);
620 link
= elf_elfsections (abfd
)[elfsec
]->sh_link
;
622 extdynsize
= get_elf_backend_data (abfd
)->s
->sizeof_dyn
;
623 swap_dyn_in
= get_elf_backend_data (abfd
)->s
->swap_dyn_in
;
626 extdynend
= extdyn
+ s
->_raw_size
;
627 for (; extdyn
< extdynend
; extdyn
+= extdynsize
)
629 Elf_Internal_Dyn dyn
;
634 (*swap_dyn_in
) (abfd
, (PTR
) extdyn
, &dyn
);
636 if (dyn
.d_tag
== DT_NULL
)
643 sprintf (ab
, "0x%lx", (unsigned long) dyn
.d_tag
);
647 case DT_NEEDED
: name
= "NEEDED"; stringp
= true; break;
648 case DT_PLTRELSZ
: name
= "PLTRELSZ"; break;
649 case DT_PLTGOT
: name
= "PLTGOT"; break;
650 case DT_HASH
: name
= "HASH"; break;
651 case DT_STRTAB
: name
= "STRTAB"; break;
652 case DT_SYMTAB
: name
= "SYMTAB"; break;
653 case DT_RELA
: name
= "RELA"; break;
654 case DT_RELASZ
: name
= "RELASZ"; break;
655 case DT_RELAENT
: name
= "RELAENT"; break;
656 case DT_STRSZ
: name
= "STRSZ"; break;
657 case DT_SYMENT
: name
= "SYMENT"; break;
658 case DT_INIT
: name
= "INIT"; break;
659 case DT_FINI
: name
= "FINI"; break;
660 case DT_SONAME
: name
= "SONAME"; stringp
= true; break;
661 case DT_RPATH
: name
= "RPATH"; stringp
= true; break;
662 case DT_SYMBOLIC
: name
= "SYMBOLIC"; break;
663 case DT_REL
: name
= "REL"; break;
664 case DT_RELSZ
: name
= "RELSZ"; break;
665 case DT_RELENT
: name
= "RELENT"; break;
666 case DT_PLTREL
: name
= "PLTREL"; break;
667 case DT_DEBUG
: name
= "DEBUG"; break;
668 case DT_TEXTREL
: name
= "TEXTREL"; break;
669 case DT_JMPREL
: name
= "JMPREL"; break;
670 case DT_BIND_NOW
: name
= "BIND_NOW"; break;
671 case DT_INIT_ARRAY
: name
= "INIT_ARRAY"; break;
672 case DT_FINI_ARRAY
: name
= "FINI_ARRAY"; break;
673 case DT_INIT_ARRAYSZ
: name
= "INIT_ARRAYSZ"; break;
674 case DT_FINI_ARRAYSZ
: name
= "FINI_ARRAYSZ"; break;
675 case DT_RUNPATH
: name
= "RUNPATH"; stringp
= true; break;
676 case DT_FLAGS
: name
= "FLAGS"; break;
677 case DT_PREINIT_ARRAY
: name
= "PREINIT_ARRAY"; break;
678 case DT_PREINIT_ARRAYSZ
: name
= "PREINIT_ARRAYSZ"; break;
679 case DT_CHECKSUM
: name
= "CHECKSUM"; break;
680 case DT_PLTPADSZ
: name
= "PLTPADSZ"; break;
681 case DT_MOVEENT
: name
= "MOVEENT"; break;
682 case DT_MOVESZ
: name
= "MOVESZ"; break;
683 case DT_FEATURE
: name
= "FEATURE"; break;
684 case DT_POSFLAG_1
: name
= "POSFLAG_1"; break;
685 case DT_SYMINSZ
: name
= "SYMINSZ"; break;
686 case DT_SYMINENT
: name
= "SYMINENT"; break;
687 case DT_CONFIG
: name
= "CONFIG"; stringp
= true; break;
688 case DT_DEPAUDIT
: name
= "DEPAUDIT"; stringp
= true; break;
689 case DT_AUDIT
: name
= "AUDIT"; stringp
= true; break;
690 case DT_PLTPAD
: name
= "PLTPAD"; break;
691 case DT_MOVETAB
: name
= "MOVETAB"; break;
692 case DT_SYMINFO
: name
= "SYMINFO"; break;
693 case DT_RELACOUNT
: name
= "RELACOUNT"; break;
694 case DT_RELCOUNT
: name
= "RELCOUNT"; break;
695 case DT_FLAGS_1
: name
= "FLAGS_1"; break;
696 case DT_VERSYM
: name
= "VERSYM"; break;
697 case DT_VERDEF
: name
= "VERDEF"; break;
698 case DT_VERDEFNUM
: name
= "VERDEFNUM"; break;
699 case DT_VERNEED
: name
= "VERNEED"; break;
700 case DT_VERNEEDNUM
: name
= "VERNEEDNUM"; break;
701 case DT_AUXILIARY
: name
= "AUXILIARY"; stringp
= true; break;
702 case DT_USED
: name
= "USED"; break;
703 case DT_FILTER
: name
= "FILTER"; stringp
= true; break;
706 fprintf (f
, " %-11s ", name
);
708 fprintf (f
, "0x%lx", (unsigned long) dyn
.d_un
.d_val
);
713 string
= bfd_elf_string_from_elf_section (abfd
, link
,
717 fprintf (f
, "%s", string
);
726 if ((elf_dynverdef (abfd
) != 0 && elf_tdata (abfd
)->verdef
== NULL
)
727 || (elf_dynverref (abfd
) != 0 && elf_tdata (abfd
)->verref
== NULL
))
729 if (! _bfd_elf_slurp_version_tables (abfd
))
733 if (elf_dynverdef (abfd
) != 0)
735 Elf_Internal_Verdef
*t
;
737 fprintf (f
, _("\nVersion definitions:\n"));
738 for (t
= elf_tdata (abfd
)->verdef
; t
!= NULL
; t
= t
->vd_nextdef
)
740 fprintf (f
, "%d 0x%2.2x 0x%8.8lx %s\n", t
->vd_ndx
,
741 t
->vd_flags
, t
->vd_hash
, t
->vd_nodename
);
742 if (t
->vd_auxptr
->vda_nextptr
!= NULL
)
744 Elf_Internal_Verdaux
*a
;
747 for (a
= t
->vd_auxptr
->vda_nextptr
;
750 fprintf (f
, "%s ", a
->vda_nodename
);
756 if (elf_dynverref (abfd
) != 0)
758 Elf_Internal_Verneed
*t
;
760 fprintf (f
, _("\nVersion References:\n"));
761 for (t
= elf_tdata (abfd
)->verref
; t
!= NULL
; t
= t
->vn_nextref
)
763 Elf_Internal_Vernaux
*a
;
765 fprintf (f
, _(" required from %s:\n"), t
->vn_filename
);
766 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
767 fprintf (f
, " 0x%8.8lx 0x%2.2x %2.2d %s\n", a
->vna_hash
,
768 a
->vna_flags
, a
->vna_other
, a
->vna_nodename
);
780 /* Display ELF-specific fields of a symbol. */
783 bfd_elf_print_symbol (abfd
, filep
, symbol
, how
)
787 bfd_print_symbol_type how
;
789 FILE *file
= (FILE *) filep
;
792 case bfd_print_symbol_name
:
793 fprintf (file
, "%s", symbol
->name
);
795 case bfd_print_symbol_more
:
796 fprintf (file
, "elf ");
797 fprintf_vma (file
, symbol
->value
);
798 fprintf (file
, " %lx", (long) symbol
->flags
);
800 case bfd_print_symbol_all
:
802 CONST
char *section_name
;
803 CONST
char *name
= NULL
;
804 struct elf_backend_data
*bed
;
805 unsigned char st_other
;
807 section_name
= symbol
->section
? symbol
->section
->name
: "(*none*)";
809 bed
= get_elf_backend_data (abfd
);
810 if (bed
->elf_backend_print_symbol_all
)
811 name
= (*bed
->elf_backend_print_symbol_all
) (abfd
, filep
, symbol
);
816 bfd_print_symbol_vandf ((PTR
) file
, symbol
);
819 fprintf (file
, " %s\t", section_name
);
820 /* Print the "other" value for a symbol. For common symbols,
821 we've already printed the size; now print the alignment.
822 For other symbols, we have no specified alignment, and
823 we've printed the address; now print the size. */
825 (bfd_is_com_section (symbol
->section
)
826 ? ((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_value
827 : ((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_size
));
829 /* If we have version information, print it. */
830 if (elf_tdata (abfd
)->dynversym_section
!= 0
831 && (elf_tdata (abfd
)->dynverdef_section
!= 0
832 || elf_tdata (abfd
)->dynverref_section
!= 0))
835 const char *version_string
;
837 vernum
= ((elf_symbol_type
*) symbol
)->version
& VERSYM_VERSION
;
841 else if (vernum
== 1)
842 version_string
= "Base";
843 else if (vernum
<= elf_tdata (abfd
)->cverdefs
)
845 elf_tdata (abfd
)->verdef
[vernum
- 1].vd_nodename
;
848 Elf_Internal_Verneed
*t
;
851 for (t
= elf_tdata (abfd
)->verref
;
855 Elf_Internal_Vernaux
*a
;
857 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
859 if (a
->vna_other
== vernum
)
861 version_string
= a
->vna_nodename
;
868 if ((((elf_symbol_type
*) symbol
)->version
& VERSYM_HIDDEN
) == 0)
869 fprintf (file
, " %-11s", version_string
);
874 fprintf (file
, " (%s)", version_string
);
875 for (i
= 10 - strlen (version_string
); i
> 0; --i
)
880 /* If the st_other field is not zero, print it. */
881 st_other
= ((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_other
;
886 case STV_INTERNAL
: fprintf (file
, " .internal"); break;
887 case STV_HIDDEN
: fprintf (file
, " .hidden"); break;
888 case STV_PROTECTED
: fprintf (file
, " .protected"); break;
890 /* Some other non-defined flags are also present, so print
892 fprintf (file
, " 0x%02x", (unsigned int) st_other
);
895 fprintf (file
, " %s", name
);
901 /* Create an entry in an ELF linker hash table. */
903 struct bfd_hash_entry
*
904 _bfd_elf_link_hash_newfunc (entry
, table
, string
)
905 struct bfd_hash_entry
*entry
;
906 struct bfd_hash_table
*table
;
909 struct elf_link_hash_entry
*ret
= (struct elf_link_hash_entry
*) entry
;
911 /* Allocate the structure if it has not already been allocated by a
913 if (ret
== (struct elf_link_hash_entry
*) NULL
)
914 ret
= ((struct elf_link_hash_entry
*)
915 bfd_hash_allocate (table
, sizeof (struct elf_link_hash_entry
)));
916 if (ret
== (struct elf_link_hash_entry
*) NULL
)
917 return (struct bfd_hash_entry
*) ret
;
919 /* Call the allocation method of the superclass. */
920 ret
= ((struct elf_link_hash_entry
*)
921 _bfd_link_hash_newfunc ((struct bfd_hash_entry
*) ret
,
923 if (ret
!= (struct elf_link_hash_entry
*) NULL
)
925 /* Set local fields. */
929 ret
->dynstr_index
= 0;
931 ret
->got
.offset
= (bfd_vma
) -1;
932 ret
->plt
.offset
= (bfd_vma
) -1;
933 ret
->linker_section_pointer
= (elf_linker_section_pointers_t
*)0;
934 ret
->verinfo
.verdef
= NULL
;
935 ret
->vtable_entries_used
= NULL
;
936 ret
->vtable_entries_size
= 0;
937 ret
->vtable_parent
= NULL
;
938 ret
->type
= STT_NOTYPE
;
940 /* Assume that we have been called by a non-ELF symbol reader.
941 This flag is then reset by the code which reads an ELF input
942 file. This ensures that a symbol created by a non-ELF symbol
943 reader will have the flag set correctly. */
944 ret
->elf_link_hash_flags
= ELF_LINK_NON_ELF
;
947 return (struct bfd_hash_entry
*) ret
;
950 /* Copy data from an indirect symbol to its direct symbol, hiding the
951 old indirect symbol. */
954 _bfd_elf_link_hash_copy_indirect (dir
, ind
)
955 struct elf_link_hash_entry
*dir
, *ind
;
957 /* Copy down any references that we may have already seen to the
958 symbol which just became indirect. */
960 dir
->elf_link_hash_flags
|=
961 (ind
->elf_link_hash_flags
962 & (ELF_LINK_HASH_REF_DYNAMIC
963 | ELF_LINK_HASH_REF_REGULAR
964 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
965 | ELF_LINK_NON_GOT_REF
));
967 /* Copy over the global and procedure linkage table offset entries.
968 These may have been already set up by a check_relocs routine. */
969 if (dir
->got
.offset
== (bfd_vma
) -1)
971 dir
->got
.offset
= ind
->got
.offset
;
972 ind
->got
.offset
= (bfd_vma
) -1;
974 BFD_ASSERT (ind
->got
.offset
== (bfd_vma
) -1);
976 if (dir
->plt
.offset
== (bfd_vma
) -1)
978 dir
->plt
.offset
= ind
->plt
.offset
;
979 ind
->plt
.offset
= (bfd_vma
) -1;
981 BFD_ASSERT (ind
->plt
.offset
== (bfd_vma
) -1);
983 if (dir
->dynindx
== -1)
985 dir
->dynindx
= ind
->dynindx
;
986 dir
->dynstr_index
= ind
->dynstr_index
;
988 ind
->dynstr_index
= 0;
990 BFD_ASSERT (ind
->dynindx
== -1);
994 _bfd_elf_link_hash_hide_symbol (info
, h
)
995 struct bfd_link_info
*info ATTRIBUTE_UNUSED
;
996 struct elf_link_hash_entry
*h
;
998 h
->elf_link_hash_flags
&= ~ELF_LINK_HASH_NEEDS_PLT
;
1000 h
->plt
.offset
= (bfd_vma
) -1;
1003 /* Initialize an ELF linker hash table. */
1006 _bfd_elf_link_hash_table_init (table
, abfd
, newfunc
)
1007 struct elf_link_hash_table
*table
;
1009 struct bfd_hash_entry
*(*newfunc
) PARAMS ((struct bfd_hash_entry
*,
1010 struct bfd_hash_table
*,
1013 table
->dynamic_sections_created
= false;
1014 table
->dynobj
= NULL
;
1015 /* The first dynamic symbol is a dummy. */
1016 table
->dynsymcount
= 1;
1017 table
->dynstr
= NULL
;
1018 table
->bucketcount
= 0;
1019 table
->needed
= NULL
;
1020 table
->runpath
= NULL
;
1022 table
->stab_info
= NULL
;
1023 table
->dynlocal
= NULL
;
1024 return _bfd_link_hash_table_init (&table
->root
, abfd
, newfunc
);
1027 /* Create an ELF linker hash table. */
1029 struct bfd_link_hash_table
*
1030 _bfd_elf_link_hash_table_create (abfd
)
1033 struct elf_link_hash_table
*ret
;
1035 ret
= ((struct elf_link_hash_table
*)
1036 bfd_alloc (abfd
, sizeof (struct elf_link_hash_table
)));
1037 if (ret
== (struct elf_link_hash_table
*) NULL
)
1040 if (! _bfd_elf_link_hash_table_init (ret
, abfd
, _bfd_elf_link_hash_newfunc
))
1042 bfd_release (abfd
, ret
);
1049 /* This is a hook for the ELF emulation code in the generic linker to
1050 tell the backend linker what file name to use for the DT_NEEDED
1051 entry for a dynamic object. The generic linker passes name as an
1052 empty string to indicate that no DT_NEEDED entry should be made. */
1055 bfd_elf_set_dt_needed_name (abfd
, name
)
1059 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1060 && bfd_get_format (abfd
) == bfd_object
)
1061 elf_dt_name (abfd
) = name
;
1065 bfd_elf_set_dt_needed_soname (abfd
, name
)
1069 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1070 && bfd_get_format (abfd
) == bfd_object
)
1071 elf_dt_soname (abfd
) = name
;
1074 /* Get the list of DT_NEEDED entries for a link. This is a hook for
1075 the linker ELF emulation code. */
1077 struct bfd_link_needed_list
*
1078 bfd_elf_get_needed_list (abfd
, info
)
1079 bfd
*abfd ATTRIBUTE_UNUSED
;
1080 struct bfd_link_info
*info
;
1082 if (info
->hash
->creator
->flavour
!= bfd_target_elf_flavour
)
1084 return elf_hash_table (info
)->needed
;
1087 /* Get the list of DT_RPATH/DT_RUNPATH entries for a link. This is a
1088 hook for the linker ELF emulation code. */
1090 struct bfd_link_needed_list
*
1091 bfd_elf_get_runpath_list (abfd
, info
)
1092 bfd
*abfd ATTRIBUTE_UNUSED
;
1093 struct bfd_link_info
*info
;
1095 if (info
->hash
->creator
->flavour
!= bfd_target_elf_flavour
)
1097 return elf_hash_table (info
)->runpath
;
1100 /* Get the name actually used for a dynamic object for a link. This
1101 is the SONAME entry if there is one. Otherwise, it is the string
1102 passed to bfd_elf_set_dt_needed_name, or it is the filename. */
1105 bfd_elf_get_dt_soname (abfd
)
1108 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1109 && bfd_get_format (abfd
) == bfd_object
)
1110 return elf_dt_name (abfd
);
1114 /* Get the list of DT_NEEDED entries from a BFD. This is a hook for
1115 the ELF linker emulation code. */
1118 bfd_elf_get_bfd_needed_list (abfd
, pneeded
)
1120 struct bfd_link_needed_list
**pneeded
;
1123 bfd_byte
*dynbuf
= NULL
;
1126 bfd_byte
*extdyn
, *extdynend
;
1128 void (*swap_dyn_in
) PARAMS ((bfd
*, const PTR
, Elf_Internal_Dyn
*));
1132 if (bfd_get_flavour (abfd
) != bfd_target_elf_flavour
1133 || bfd_get_format (abfd
) != bfd_object
)
1136 s
= bfd_get_section_by_name (abfd
, ".dynamic");
1137 if (s
== NULL
|| s
->_raw_size
== 0)
1140 dynbuf
= (bfd_byte
*) bfd_malloc (s
->_raw_size
);
1144 if (! bfd_get_section_contents (abfd
, s
, (PTR
) dynbuf
, (file_ptr
) 0,
1148 elfsec
= _bfd_elf_section_from_bfd_section (abfd
, s
);
1152 link
= elf_elfsections (abfd
)[elfsec
]->sh_link
;
1154 extdynsize
= get_elf_backend_data (abfd
)->s
->sizeof_dyn
;
1155 swap_dyn_in
= get_elf_backend_data (abfd
)->s
->swap_dyn_in
;
1158 extdynend
= extdyn
+ s
->_raw_size
;
1159 for (; extdyn
< extdynend
; extdyn
+= extdynsize
)
1161 Elf_Internal_Dyn dyn
;
1163 (*swap_dyn_in
) (abfd
, (PTR
) extdyn
, &dyn
);
1165 if (dyn
.d_tag
== DT_NULL
)
1168 if (dyn
.d_tag
== DT_NEEDED
)
1171 struct bfd_link_needed_list
*l
;
1173 string
= bfd_elf_string_from_elf_section (abfd
, link
,
1178 l
= (struct bfd_link_needed_list
*) bfd_alloc (abfd
, sizeof *l
);
1199 /* Allocate an ELF string table--force the first byte to be zero. */
1201 struct bfd_strtab_hash
*
1202 _bfd_elf_stringtab_init ()
1204 struct bfd_strtab_hash
*ret
;
1206 ret
= _bfd_stringtab_init ();
1211 loc
= _bfd_stringtab_add (ret
, "", true, false);
1212 BFD_ASSERT (loc
== 0 || loc
== (bfd_size_type
) -1);
1213 if (loc
== (bfd_size_type
) -1)
1215 _bfd_stringtab_free (ret
);
1222 /* ELF .o/exec file reading */
1224 /* Create a new bfd section from an ELF section header. */
1227 bfd_section_from_shdr (abfd
, shindex
)
1229 unsigned int shindex
;
1231 Elf_Internal_Shdr
*hdr
= elf_elfsections (abfd
)[shindex
];
1232 Elf_Internal_Ehdr
*ehdr
= elf_elfheader (abfd
);
1233 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
1236 name
= elf_string_from_elf_strtab (abfd
, hdr
->sh_name
);
1238 switch (hdr
->sh_type
)
1241 /* Inactive section. Throw it away. */
1244 case SHT_PROGBITS
: /* Normal section with contents. */
1245 case SHT_DYNAMIC
: /* Dynamic linking information. */
1246 case SHT_NOBITS
: /* .bss section. */
1247 case SHT_HASH
: /* .hash section. */
1248 case SHT_NOTE
: /* .note section. */
1249 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1251 case SHT_SYMTAB
: /* A symbol table */
1252 if (elf_onesymtab (abfd
) == shindex
)
1255 BFD_ASSERT (hdr
->sh_entsize
== bed
->s
->sizeof_sym
);
1256 BFD_ASSERT (elf_onesymtab (abfd
) == 0);
1257 elf_onesymtab (abfd
) = shindex
;
1258 elf_tdata (abfd
)->symtab_hdr
= *hdr
;
1259 elf_elfsections (abfd
)[shindex
] = hdr
= &elf_tdata (abfd
)->symtab_hdr
;
1260 abfd
->flags
|= HAS_SYMS
;
1262 /* Sometimes a shared object will map in the symbol table. If
1263 SHF_ALLOC is set, and this is a shared object, then we also
1264 treat this section as a BFD section. We can not base the
1265 decision purely on SHF_ALLOC, because that flag is sometimes
1266 set in a relocateable object file, which would confuse the
1268 if ((hdr
->sh_flags
& SHF_ALLOC
) != 0
1269 && (abfd
->flags
& DYNAMIC
) != 0
1270 && ! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
))
1275 case SHT_DYNSYM
: /* A dynamic symbol table */
1276 if (elf_dynsymtab (abfd
) == shindex
)
1279 BFD_ASSERT (hdr
->sh_entsize
== bed
->s
->sizeof_sym
);
1280 BFD_ASSERT (elf_dynsymtab (abfd
) == 0);
1281 elf_dynsymtab (abfd
) = shindex
;
1282 elf_tdata (abfd
)->dynsymtab_hdr
= *hdr
;
1283 elf_elfsections (abfd
)[shindex
] = hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
1284 abfd
->flags
|= HAS_SYMS
;
1286 /* Besides being a symbol table, we also treat this as a regular
1287 section, so that objcopy can handle it. */
1288 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1290 case SHT_STRTAB
: /* A string table */
1291 if (hdr
->bfd_section
!= NULL
)
1293 if (ehdr
->e_shstrndx
== shindex
)
1295 elf_tdata (abfd
)->shstrtab_hdr
= *hdr
;
1296 elf_elfsections (abfd
)[shindex
] = &elf_tdata (abfd
)->shstrtab_hdr
;
1302 for (i
= 1; i
< ehdr
->e_shnum
; i
++)
1304 Elf_Internal_Shdr
*hdr2
= elf_elfsections (abfd
)[i
];
1305 if (hdr2
->sh_link
== shindex
)
1307 if (! bfd_section_from_shdr (abfd
, i
))
1309 if (elf_onesymtab (abfd
) == i
)
1311 elf_tdata (abfd
)->strtab_hdr
= *hdr
;
1312 elf_elfsections (abfd
)[shindex
] =
1313 &elf_tdata (abfd
)->strtab_hdr
;
1316 if (elf_dynsymtab (abfd
) == i
)
1318 elf_tdata (abfd
)->dynstrtab_hdr
= *hdr
;
1319 elf_elfsections (abfd
)[shindex
] = hdr
=
1320 &elf_tdata (abfd
)->dynstrtab_hdr
;
1321 /* We also treat this as a regular section, so
1322 that objcopy can handle it. */
1325 #if 0 /* Not handling other string tables specially right now. */
1326 hdr2
= elf_elfsections (abfd
)[i
]; /* in case it moved */
1327 /* We have a strtab for some random other section. */
1328 newsect
= (asection
*) hdr2
->bfd_section
;
1331 hdr
->bfd_section
= newsect
;
1332 hdr2
= &elf_section_data (newsect
)->str_hdr
;
1334 elf_elfsections (abfd
)[shindex
] = hdr2
;
1340 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1344 /* *These* do a lot of work -- but build no sections! */
1346 asection
*target_sect
;
1347 Elf_Internal_Shdr
*hdr2
;
1349 /* Check for a bogus link to avoid crashing. */
1350 if (hdr
->sh_link
>= ehdr
->e_shnum
)
1352 ((*_bfd_error_handler
)
1353 (_("%s: invalid link %lu for reloc section %s (index %u)"),
1354 bfd_get_filename (abfd
), hdr
->sh_link
, name
, shindex
));
1355 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1358 /* For some incomprehensible reason Oracle distributes
1359 libraries for Solaris in which some of the objects have
1360 bogus sh_link fields. It would be nice if we could just
1361 reject them, but, unfortunately, some people need to use
1362 them. We scan through the section headers; if we find only
1363 one suitable symbol table, we clobber the sh_link to point
1364 to it. I hope this doesn't break anything. */
1365 if (elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_SYMTAB
1366 && elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_DYNSYM
)
1372 for (scan
= 1; scan
< ehdr
->e_shnum
; scan
++)
1374 if (elf_elfsections (abfd
)[scan
]->sh_type
== SHT_SYMTAB
1375 || elf_elfsections (abfd
)[scan
]->sh_type
== SHT_DYNSYM
)
1386 hdr
->sh_link
= found
;
1389 /* Get the symbol table. */
1390 if (elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
== SHT_SYMTAB
1391 && ! bfd_section_from_shdr (abfd
, hdr
->sh_link
))
1394 /* If this reloc section does not use the main symbol table we
1395 don't treat it as a reloc section. BFD can't adequately
1396 represent such a section, so at least for now, we don't
1397 try. We just present it as a normal section. We also
1398 can't use it as a reloc section if it points to the null
1400 if (hdr
->sh_link
!= elf_onesymtab (abfd
) || hdr
->sh_info
== SHN_UNDEF
)
1401 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1403 if (! bfd_section_from_shdr (abfd
, hdr
->sh_info
))
1405 target_sect
= bfd_section_from_elf_index (abfd
, hdr
->sh_info
);
1406 if (target_sect
== NULL
)
1409 if ((target_sect
->flags
& SEC_RELOC
) == 0
1410 || target_sect
->reloc_count
== 0)
1411 hdr2
= &elf_section_data (target_sect
)->rel_hdr
;
1414 BFD_ASSERT (elf_section_data (target_sect
)->rel_hdr2
== NULL
);
1415 hdr2
= (Elf_Internal_Shdr
*) bfd_alloc (abfd
, sizeof (*hdr2
));
1416 elf_section_data (target_sect
)->rel_hdr2
= hdr2
;
1419 elf_elfsections (abfd
)[shindex
] = hdr2
;
1420 target_sect
->reloc_count
+= hdr
->sh_size
/ hdr
->sh_entsize
;
1421 target_sect
->flags
|= SEC_RELOC
;
1422 target_sect
->relocation
= NULL
;
1423 target_sect
->rel_filepos
= hdr
->sh_offset
;
1424 /* In the section to which the relocations apply, mark whether
1425 its relocations are of the REL or RELA variety. */
1426 if (hdr
->sh_size
!= 0)
1427 elf_section_data (target_sect
)->use_rela_p
1428 = (hdr
->sh_type
== SHT_RELA
);
1429 abfd
->flags
|= HAS_RELOC
;
1434 case SHT_GNU_verdef
:
1435 elf_dynverdef (abfd
) = shindex
;
1436 elf_tdata (abfd
)->dynverdef_hdr
= *hdr
;
1437 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1440 case SHT_GNU_versym
:
1441 elf_dynversym (abfd
) = shindex
;
1442 elf_tdata (abfd
)->dynversym_hdr
= *hdr
;
1443 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1446 case SHT_GNU_verneed
:
1447 elf_dynverref (abfd
) = shindex
;
1448 elf_tdata (abfd
)->dynverref_hdr
= *hdr
;
1449 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
1456 /* Check for any processor-specific section types. */
1458 if (bed
->elf_backend_section_from_shdr
)
1459 (*bed
->elf_backend_section_from_shdr
) (abfd
, hdr
, name
);
1467 /* Given an ELF section number, retrieve the corresponding BFD
1471 bfd_section_from_elf_index (abfd
, index
)
1475 BFD_ASSERT (index
> 0 && index
< SHN_LORESERVE
);
1476 if (index
>= elf_elfheader (abfd
)->e_shnum
)
1478 return elf_elfsections (abfd
)[index
]->bfd_section
;
1482 _bfd_elf_new_section_hook (abfd
, sec
)
1486 struct bfd_elf_section_data
*sdata
;
1488 sdata
= (struct bfd_elf_section_data
*) bfd_zalloc (abfd
, sizeof (*sdata
));
1491 sec
->used_by_bfd
= (PTR
) sdata
;
1493 /* Indicate whether or not this section should use RELA relocations. */
1495 = get_elf_backend_data (abfd
)->default_use_rela_p
;
1500 /* Create a new bfd section from an ELF program header.
1502 Since program segments have no names, we generate a synthetic name
1503 of the form segment<NUM>, where NUM is generally the index in the
1504 program header table. For segments that are split (see below) we
1505 generate the names segment<NUM>a and segment<NUM>b.
1507 Note that some program segments may have a file size that is different than
1508 (less than) the memory size. All this means is that at execution the
1509 system must allocate the amount of memory specified by the memory size,
1510 but only initialize it with the first "file size" bytes read from the
1511 file. This would occur for example, with program segments consisting
1512 of combined data+bss.
1514 To handle the above situation, this routine generates TWO bfd sections
1515 for the single program segment. The first has the length specified by
1516 the file size of the segment, and the second has the length specified
1517 by the difference between the two sizes. In effect, the segment is split
1518 into it's initialized and uninitialized parts.
1523 _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, typename
)
1525 Elf_Internal_Phdr
*hdr
;
1527 const char *typename
;
1534 split
= ((hdr
->p_memsz
> 0)
1535 && (hdr
->p_filesz
> 0)
1536 && (hdr
->p_memsz
> hdr
->p_filesz
));
1537 sprintf (namebuf
, "%s%d%s", typename
, index
, split
? "a" : "");
1538 name
= bfd_alloc (abfd
, strlen (namebuf
) + 1);
1541 strcpy (name
, namebuf
);
1542 newsect
= bfd_make_section (abfd
, name
);
1543 if (newsect
== NULL
)
1545 newsect
->vma
= hdr
->p_vaddr
;
1546 newsect
->lma
= hdr
->p_paddr
;
1547 newsect
->_raw_size
= hdr
->p_filesz
;
1548 newsect
->filepos
= hdr
->p_offset
;
1549 newsect
->flags
|= SEC_HAS_CONTENTS
;
1550 if (hdr
->p_type
== PT_LOAD
)
1552 newsect
->flags
|= SEC_ALLOC
;
1553 newsect
->flags
|= SEC_LOAD
;
1554 if (hdr
->p_flags
& PF_X
)
1556 /* FIXME: all we known is that it has execute PERMISSION,
1558 newsect
->flags
|= SEC_CODE
;
1561 if (!(hdr
->p_flags
& PF_W
))
1563 newsect
->flags
|= SEC_READONLY
;
1568 sprintf (namebuf
, "%s%db", typename
, index
);
1569 name
= bfd_alloc (abfd
, strlen (namebuf
) + 1);
1572 strcpy (name
, namebuf
);
1573 newsect
= bfd_make_section (abfd
, name
);
1574 if (newsect
== NULL
)
1576 newsect
->vma
= hdr
->p_vaddr
+ hdr
->p_filesz
;
1577 newsect
->lma
= hdr
->p_paddr
+ hdr
->p_filesz
;
1578 newsect
->_raw_size
= hdr
->p_memsz
- hdr
->p_filesz
;
1579 if (hdr
->p_type
== PT_LOAD
)
1581 newsect
->flags
|= SEC_ALLOC
;
1582 if (hdr
->p_flags
& PF_X
)
1583 newsect
->flags
|= SEC_CODE
;
1585 if (!(hdr
->p_flags
& PF_W
))
1586 newsect
->flags
|= SEC_READONLY
;
1593 bfd_section_from_phdr (abfd
, hdr
, index
)
1595 Elf_Internal_Phdr
*hdr
;
1598 struct elf_backend_data
*bed
;
1600 switch (hdr
->p_type
)
1603 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "null");
1606 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "load");
1609 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "dynamic");
1612 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "interp");
1615 if (! _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "note"))
1617 if (! elfcore_read_notes (abfd
, hdr
->p_offset
, hdr
->p_filesz
))
1622 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "shlib");
1625 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "phdr");
1628 /* Check for any processor-specific program segment types.
1629 If no handler for them, default to making "segment" sections. */
1630 bed
= get_elf_backend_data (abfd
);
1631 if (bed
->elf_backend_section_from_phdr
)
1632 return (*bed
->elf_backend_section_from_phdr
) (abfd
, hdr
, index
);
1634 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "segment");
1638 /* Initialize REL_HDR, the section-header for new section, containing
1639 relocations against ASECT. If USE_RELA_P is true, we use RELA
1640 relocations; otherwise, we use REL relocations. */
1643 _bfd_elf_init_reloc_shdr (abfd
, rel_hdr
, asect
, use_rela_p
)
1645 Elf_Internal_Shdr
*rel_hdr
;
1650 struct elf_backend_data
*bed
;
1652 bed
= get_elf_backend_data (abfd
);
1653 name
= bfd_alloc (abfd
, sizeof ".rela" + strlen (asect
->name
));
1656 sprintf (name
, "%s%s", use_rela_p
? ".rela" : ".rel", asect
->name
);
1658 (unsigned int) _bfd_stringtab_add (elf_shstrtab (abfd
), name
,
1660 if (rel_hdr
->sh_name
== (unsigned int) -1)
1662 rel_hdr
->sh_type
= use_rela_p
? SHT_RELA
: SHT_REL
;
1663 rel_hdr
->sh_entsize
= (use_rela_p
1664 ? bed
->s
->sizeof_rela
1665 : bed
->s
->sizeof_rel
);
1666 rel_hdr
->sh_addralign
= bed
->s
->file_align
;
1667 rel_hdr
->sh_flags
= 0;
1668 rel_hdr
->sh_addr
= 0;
1669 rel_hdr
->sh_size
= 0;
1670 rel_hdr
->sh_offset
= 0;
1675 /* Set up an ELF internal section header for a section. */
1678 elf_fake_sections (abfd
, asect
, failedptrarg
)
1683 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
1684 boolean
*failedptr
= (boolean
*) failedptrarg
;
1685 Elf_Internal_Shdr
*this_hdr
;
1689 /* We already failed; just get out of the bfd_map_over_sections
1694 this_hdr
= &elf_section_data (asect
)->this_hdr
;
1696 this_hdr
->sh_name
= (unsigned long) _bfd_stringtab_add (elf_shstrtab (abfd
),
1699 if (this_hdr
->sh_name
== (unsigned long) -1)
1705 this_hdr
->sh_flags
= 0;
1707 if ((asect
->flags
& SEC_ALLOC
) != 0
1708 || asect
->user_set_vma
)
1709 this_hdr
->sh_addr
= asect
->vma
;
1711 this_hdr
->sh_addr
= 0;
1713 this_hdr
->sh_offset
= 0;
1714 this_hdr
->sh_size
= asect
->_raw_size
;
1715 this_hdr
->sh_link
= 0;
1716 this_hdr
->sh_addralign
= 1 << asect
->alignment_power
;
1717 /* The sh_entsize and sh_info fields may have been set already by
1718 copy_private_section_data. */
1720 this_hdr
->bfd_section
= asect
;
1721 this_hdr
->contents
= NULL
;
1723 /* FIXME: This should not be based on section names. */
1724 if (strcmp (asect
->name
, ".dynstr") == 0)
1725 this_hdr
->sh_type
= SHT_STRTAB
;
1726 else if (strcmp (asect
->name
, ".hash") == 0)
1728 this_hdr
->sh_type
= SHT_HASH
;
1729 this_hdr
->sh_entsize
= bed
->s
->sizeof_hash_entry
;
1731 else if (strcmp (asect
->name
, ".dynsym") == 0)
1733 this_hdr
->sh_type
= SHT_DYNSYM
;
1734 this_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
1736 else if (strcmp (asect
->name
, ".dynamic") == 0)
1738 this_hdr
->sh_type
= SHT_DYNAMIC
;
1739 this_hdr
->sh_entsize
= bed
->s
->sizeof_dyn
;
1741 else if (strncmp (asect
->name
, ".rela", 5) == 0
1742 && get_elf_backend_data (abfd
)->may_use_rela_p
)
1744 this_hdr
->sh_type
= SHT_RELA
;
1745 this_hdr
->sh_entsize
= bed
->s
->sizeof_rela
;
1747 else if (strncmp (asect
->name
, ".rel", 4) == 0
1748 && get_elf_backend_data (abfd
)->may_use_rel_p
)
1750 this_hdr
->sh_type
= SHT_REL
;
1751 this_hdr
->sh_entsize
= bed
->s
->sizeof_rel
;
1753 else if (strncmp (asect
->name
, ".note", 5) == 0)
1754 this_hdr
->sh_type
= SHT_NOTE
;
1755 else if (strncmp (asect
->name
, ".stab", 5) == 0
1756 && strcmp (asect
->name
+ strlen (asect
->name
) - 3, "str") == 0)
1757 this_hdr
->sh_type
= SHT_STRTAB
;
1758 else if (strcmp (asect
->name
, ".gnu.version") == 0)
1760 this_hdr
->sh_type
= SHT_GNU_versym
;
1761 this_hdr
->sh_entsize
= sizeof (Elf_External_Versym
);
1763 else if (strcmp (asect
->name
, ".gnu.version_d") == 0)
1765 this_hdr
->sh_type
= SHT_GNU_verdef
;
1766 this_hdr
->sh_entsize
= 0;
1767 /* objcopy or strip will copy over sh_info, but may not set
1768 cverdefs. The linker will set cverdefs, but sh_info will be
1770 if (this_hdr
->sh_info
== 0)
1771 this_hdr
->sh_info
= elf_tdata (abfd
)->cverdefs
;
1773 BFD_ASSERT (elf_tdata (abfd
)->cverdefs
== 0
1774 || this_hdr
->sh_info
== elf_tdata (abfd
)->cverdefs
);
1776 else if (strcmp (asect
->name
, ".gnu.version_r") == 0)
1778 this_hdr
->sh_type
= SHT_GNU_verneed
;
1779 this_hdr
->sh_entsize
= 0;
1780 /* objcopy or strip will copy over sh_info, but may not set
1781 cverrefs. The linker will set cverrefs, but sh_info will be
1783 if (this_hdr
->sh_info
== 0)
1784 this_hdr
->sh_info
= elf_tdata (abfd
)->cverrefs
;
1786 BFD_ASSERT (elf_tdata (abfd
)->cverrefs
== 0
1787 || this_hdr
->sh_info
== elf_tdata (abfd
)->cverrefs
);
1789 else if ((asect
->flags
& SEC_ALLOC
) != 0
1790 && (asect
->flags
& SEC_LOAD
) != 0)
1791 this_hdr
->sh_type
= SHT_PROGBITS
;
1792 else if ((asect
->flags
& SEC_ALLOC
) != 0
1793 && ((asect
->flags
& SEC_LOAD
) == 0))
1794 this_hdr
->sh_type
= SHT_NOBITS
;
1798 this_hdr
->sh_type
= SHT_PROGBITS
;
1801 if ((asect
->flags
& SEC_ALLOC
) != 0)
1802 this_hdr
->sh_flags
|= SHF_ALLOC
;
1803 if ((asect
->flags
& SEC_READONLY
) == 0)
1804 this_hdr
->sh_flags
|= SHF_WRITE
;
1805 if ((asect
->flags
& SEC_CODE
) != 0)
1806 this_hdr
->sh_flags
|= SHF_EXECINSTR
;
1808 /* Check for processor-specific section types. */
1809 if (bed
->elf_backend_fake_sections
)
1810 (*bed
->elf_backend_fake_sections
) (abfd
, this_hdr
, asect
);
1812 /* If the section has relocs, set up a section header for the
1813 SHT_REL[A] section. If two relocation sections are required for
1814 this section, it is up to the processor-specific back-end to
1815 create the other. */
1816 if ((asect
->flags
& SEC_RELOC
) != 0
1817 && !_bfd_elf_init_reloc_shdr (abfd
,
1818 &elf_section_data (asect
)->rel_hdr
,
1820 elf_section_data (asect
)->use_rela_p
))
1824 /* Assign all ELF section numbers. The dummy first section is handled here
1825 too. The link/info pointers for the standard section types are filled
1826 in here too, while we're at it. */
1829 assign_section_numbers (abfd
)
1832 struct elf_obj_tdata
*t
= elf_tdata (abfd
);
1834 unsigned int section_number
;
1835 Elf_Internal_Shdr
**i_shdrp
;
1839 for (sec
= abfd
->sections
; sec
; sec
= sec
->next
)
1841 struct bfd_elf_section_data
*d
= elf_section_data (sec
);
1843 d
->this_idx
= section_number
++;
1844 if ((sec
->flags
& SEC_RELOC
) == 0)
1847 d
->rel_idx
= section_number
++;
1850 d
->rel_idx2
= section_number
++;
1855 t
->shstrtab_section
= section_number
++;
1856 elf_elfheader (abfd
)->e_shstrndx
= t
->shstrtab_section
;
1857 t
->shstrtab_hdr
.sh_size
= _bfd_stringtab_size (elf_shstrtab (abfd
));
1859 if (bfd_get_symcount (abfd
) > 0)
1861 t
->symtab_section
= section_number
++;
1862 t
->strtab_section
= section_number
++;
1865 elf_elfheader (abfd
)->e_shnum
= section_number
;
1867 /* Set up the list of section header pointers, in agreement with the
1869 i_shdrp
= ((Elf_Internal_Shdr
**)
1870 bfd_alloc (abfd
, section_number
* sizeof (Elf_Internal_Shdr
*)));
1871 if (i_shdrp
== NULL
)
1874 i_shdrp
[0] = ((Elf_Internal_Shdr
*)
1875 bfd_alloc (abfd
, sizeof (Elf_Internal_Shdr
)));
1876 if (i_shdrp
[0] == NULL
)
1878 bfd_release (abfd
, i_shdrp
);
1881 memset (i_shdrp
[0], 0, sizeof (Elf_Internal_Shdr
));
1883 elf_elfsections (abfd
) = i_shdrp
;
1885 i_shdrp
[t
->shstrtab_section
] = &t
->shstrtab_hdr
;
1886 if (bfd_get_symcount (abfd
) > 0)
1888 i_shdrp
[t
->symtab_section
] = &t
->symtab_hdr
;
1889 i_shdrp
[t
->strtab_section
] = &t
->strtab_hdr
;
1890 t
->symtab_hdr
.sh_link
= t
->strtab_section
;
1892 for (sec
= abfd
->sections
; sec
; sec
= sec
->next
)
1894 struct bfd_elf_section_data
*d
= elf_section_data (sec
);
1898 i_shdrp
[d
->this_idx
] = &d
->this_hdr
;
1899 if (d
->rel_idx
!= 0)
1900 i_shdrp
[d
->rel_idx
] = &d
->rel_hdr
;
1901 if (d
->rel_idx2
!= 0)
1902 i_shdrp
[d
->rel_idx2
] = d
->rel_hdr2
;
1904 /* Fill in the sh_link and sh_info fields while we're at it. */
1906 /* sh_link of a reloc section is the section index of the symbol
1907 table. sh_info is the section index of the section to which
1908 the relocation entries apply. */
1909 if (d
->rel_idx
!= 0)
1911 d
->rel_hdr
.sh_link
= t
->symtab_section
;
1912 d
->rel_hdr
.sh_info
= d
->this_idx
;
1914 if (d
->rel_idx2
!= 0)
1916 d
->rel_hdr2
->sh_link
= t
->symtab_section
;
1917 d
->rel_hdr2
->sh_info
= d
->this_idx
;
1920 switch (d
->this_hdr
.sh_type
)
1924 /* A reloc section which we are treating as a normal BFD
1925 section. sh_link is the section index of the symbol
1926 table. sh_info is the section index of the section to
1927 which the relocation entries apply. We assume that an
1928 allocated reloc section uses the dynamic symbol table.
1929 FIXME: How can we be sure? */
1930 s
= bfd_get_section_by_name (abfd
, ".dynsym");
1932 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
1934 /* We look up the section the relocs apply to by name. */
1936 if (d
->this_hdr
.sh_type
== SHT_REL
)
1940 s
= bfd_get_section_by_name (abfd
, name
);
1942 d
->this_hdr
.sh_info
= elf_section_data (s
)->this_idx
;
1946 /* We assume that a section named .stab*str is a stabs
1947 string section. We look for a section with the same name
1948 but without the trailing ``str'', and set its sh_link
1949 field to point to this section. */
1950 if (strncmp (sec
->name
, ".stab", sizeof ".stab" - 1) == 0
1951 && strcmp (sec
->name
+ strlen (sec
->name
) - 3, "str") == 0)
1956 len
= strlen (sec
->name
);
1957 alc
= (char *) bfd_malloc (len
- 2);
1960 strncpy (alc
, sec
->name
, len
- 3);
1961 alc
[len
- 3] = '\0';
1962 s
= bfd_get_section_by_name (abfd
, alc
);
1966 elf_section_data (s
)->this_hdr
.sh_link
= d
->this_idx
;
1968 /* This is a .stab section. */
1969 elf_section_data (s
)->this_hdr
.sh_entsize
=
1970 4 + 2 * bfd_get_arch_size (abfd
) / 8;
1977 case SHT_GNU_verneed
:
1978 case SHT_GNU_verdef
:
1979 /* sh_link is the section header index of the string table
1980 used for the dynamic entries, or the symbol table, or the
1982 s
= bfd_get_section_by_name (abfd
, ".dynstr");
1984 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
1988 case SHT_GNU_versym
:
1989 /* sh_link is the section header index of the symbol table
1990 this hash table or version table is for. */
1991 s
= bfd_get_section_by_name (abfd
, ".dynsym");
1993 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
2001 /* Map symbol from it's internal number to the external number, moving
2002 all local symbols to be at the head of the list. */
2005 sym_is_global (abfd
, sym
)
2009 /* If the backend has a special mapping, use it. */
2010 if (get_elf_backend_data (abfd
)->elf_backend_sym_is_global
)
2011 return ((*get_elf_backend_data (abfd
)->elf_backend_sym_is_global
)
2014 return ((sym
->flags
& (BSF_GLOBAL
| BSF_WEAK
)) != 0
2015 || bfd_is_und_section (bfd_get_section (sym
))
2016 || bfd_is_com_section (bfd_get_section (sym
)));
2020 elf_map_symbols (abfd
)
2023 int symcount
= bfd_get_symcount (abfd
);
2024 asymbol
**syms
= bfd_get_outsymbols (abfd
);
2025 asymbol
**sect_syms
;
2027 int num_globals
= 0;
2028 int num_locals2
= 0;
2029 int num_globals2
= 0;
2031 int num_sections
= 0;
2038 fprintf (stderr
, "elf_map_symbols\n");
2042 /* Add a section symbol for each BFD section. FIXME: Is this really
2044 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
2046 if (max_index
< asect
->index
)
2047 max_index
= asect
->index
;
2051 sect_syms
= (asymbol
**) bfd_zalloc (abfd
, max_index
* sizeof (asymbol
*));
2052 if (sect_syms
== NULL
)
2054 elf_section_syms (abfd
) = sect_syms
;
2056 for (idx
= 0; idx
< symcount
; idx
++)
2060 if ((sym
->flags
& BSF_SECTION_SYM
) != 0
2067 if (sec
->owner
!= NULL
)
2069 if (sec
->owner
!= abfd
)
2071 if (sec
->output_offset
!= 0)
2074 sec
= sec
->output_section
;
2076 /* Empty sections in the input files may have had a section
2077 symbol created for them. (See the comment near the end of
2078 _bfd_generic_link_output_symbols in linker.c). If the linker
2079 script discards such sections then we will reach this point.
2080 Since we know that we cannot avoid this case, we detect it
2081 and skip the abort and the assignment to the sect_syms array.
2082 To reproduce this particular case try running the linker
2083 testsuite test ld-scripts/weak.exp for an ELF port that uses
2084 the generic linker. */
2085 if (sec
->owner
== NULL
)
2088 BFD_ASSERT (sec
->owner
== abfd
);
2090 sect_syms
[sec
->index
] = syms
[idx
];
2095 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
2097 if (sect_syms
[asect
->index
] != NULL
)
2100 sym
= bfd_make_empty_symbol (abfd
);
2103 sym
->the_bfd
= abfd
;
2104 sym
->name
= asect
->name
;
2106 /* Set the flags to 0 to indicate that this one was newly added. */
2108 sym
->section
= asect
;
2109 sect_syms
[asect
->index
] = sym
;
2113 _("creating section symbol, name = %s, value = 0x%.8lx, index = %d, section = 0x%.8lx\n"),
2114 asect
->name
, (long) asect
->vma
, asect
->index
, (long) asect
);
2118 /* Classify all of the symbols. */
2119 for (idx
= 0; idx
< symcount
; idx
++)
2121 if (!sym_is_global (abfd
, syms
[idx
]))
2126 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
2128 if (sect_syms
[asect
->index
] != NULL
2129 && sect_syms
[asect
->index
]->flags
== 0)
2131 sect_syms
[asect
->index
]->flags
= BSF_SECTION_SYM
;
2132 if (!sym_is_global (abfd
, sect_syms
[asect
->index
]))
2136 sect_syms
[asect
->index
]->flags
= 0;
2140 /* Now sort the symbols so the local symbols are first. */
2141 new_syms
= ((asymbol
**)
2143 (num_locals
+ num_globals
) * sizeof (asymbol
*)));
2144 if (new_syms
== NULL
)
2147 for (idx
= 0; idx
< symcount
; idx
++)
2149 asymbol
*sym
= syms
[idx
];
2152 if (!sym_is_global (abfd
, sym
))
2155 i
= num_locals
+ num_globals2
++;
2157 sym
->udata
.i
= i
+ 1;
2159 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
2161 if (sect_syms
[asect
->index
] != NULL
2162 && sect_syms
[asect
->index
]->flags
== 0)
2164 asymbol
*sym
= sect_syms
[asect
->index
];
2167 sym
->flags
= BSF_SECTION_SYM
;
2168 if (!sym_is_global (abfd
, sym
))
2171 i
= num_locals
+ num_globals2
++;
2173 sym
->udata
.i
= i
+ 1;
2177 bfd_set_symtab (abfd
, new_syms
, num_locals
+ num_globals
);
2179 elf_num_locals (abfd
) = num_locals
;
2180 elf_num_globals (abfd
) = num_globals
;
2184 /* Align to the maximum file alignment that could be required for any
2185 ELF data structure. */
2187 static INLINE file_ptr align_file_position
PARAMS ((file_ptr
, int));
2188 static INLINE file_ptr
2189 align_file_position (off
, align
)
2193 return (off
+ align
- 1) & ~(align
- 1);
2196 /* Assign a file position to a section, optionally aligning to the
2197 required section alignment. */
2200 _bfd_elf_assign_file_position_for_section (i_shdrp
, offset
, align
)
2201 Elf_Internal_Shdr
*i_shdrp
;
2209 al
= i_shdrp
->sh_addralign
;
2211 offset
= BFD_ALIGN (offset
, al
);
2213 i_shdrp
->sh_offset
= offset
;
2214 if (i_shdrp
->bfd_section
!= NULL
)
2215 i_shdrp
->bfd_section
->filepos
= offset
;
2216 if (i_shdrp
->sh_type
!= SHT_NOBITS
)
2217 offset
+= i_shdrp
->sh_size
;
2221 /* Compute the file positions we are going to put the sections at, and
2222 otherwise prepare to begin writing out the ELF file. If LINK_INFO
2223 is not NULL, this is being called by the ELF backend linker. */
2226 _bfd_elf_compute_section_file_positions (abfd
, link_info
)
2228 struct bfd_link_info
*link_info
;
2230 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2232 struct bfd_strtab_hash
*strtab
;
2233 Elf_Internal_Shdr
*shstrtab_hdr
;
2235 if (abfd
->output_has_begun
)
2238 /* Do any elf backend specific processing first. */
2239 if (bed
->elf_backend_begin_write_processing
)
2240 (*bed
->elf_backend_begin_write_processing
) (abfd
, link_info
);
2242 if (! prep_headers (abfd
))
2245 /* Post process the headers if necessary. */
2246 if (bed
->elf_backend_post_process_headers
)
2247 (*bed
->elf_backend_post_process_headers
) (abfd
, link_info
);
2250 bfd_map_over_sections (abfd
, elf_fake_sections
, &failed
);
2254 if (!assign_section_numbers (abfd
))
2257 /* The backend linker builds symbol table information itself. */
2258 if (link_info
== NULL
&& bfd_get_symcount (abfd
) > 0)
2260 /* Non-zero if doing a relocatable link. */
2261 int relocatable_p
= ! (abfd
->flags
& (EXEC_P
| DYNAMIC
));
2263 if (! swap_out_syms (abfd
, &strtab
, relocatable_p
))
2267 shstrtab_hdr
= &elf_tdata (abfd
)->shstrtab_hdr
;
2268 /* sh_name was set in prep_headers. */
2269 shstrtab_hdr
->sh_type
= SHT_STRTAB
;
2270 shstrtab_hdr
->sh_flags
= 0;
2271 shstrtab_hdr
->sh_addr
= 0;
2272 shstrtab_hdr
->sh_size
= _bfd_stringtab_size (elf_shstrtab (abfd
));
2273 shstrtab_hdr
->sh_entsize
= 0;
2274 shstrtab_hdr
->sh_link
= 0;
2275 shstrtab_hdr
->sh_info
= 0;
2276 /* sh_offset is set in assign_file_positions_except_relocs. */
2277 shstrtab_hdr
->sh_addralign
= 1;
2279 if (!assign_file_positions_except_relocs (abfd
))
2282 if (link_info
== NULL
&& bfd_get_symcount (abfd
) > 0)
2285 Elf_Internal_Shdr
*hdr
;
2287 off
= elf_tdata (abfd
)->next_file_pos
;
2289 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2290 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, true);
2292 hdr
= &elf_tdata (abfd
)->strtab_hdr
;
2293 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, true);
2295 elf_tdata (abfd
)->next_file_pos
= off
;
2297 /* Now that we know where the .strtab section goes, write it
2299 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
2300 || ! _bfd_stringtab_emit (abfd
, strtab
))
2302 _bfd_stringtab_free (strtab
);
2305 abfd
->output_has_begun
= true;
2310 /* Create a mapping from a set of sections to a program segment. */
2312 static INLINE
struct elf_segment_map
*
2313 make_mapping (abfd
, sections
, from
, to
, phdr
)
2315 asection
**sections
;
2320 struct elf_segment_map
*m
;
2324 m
= ((struct elf_segment_map
*)
2326 (sizeof (struct elf_segment_map
)
2327 + (to
- from
- 1) * sizeof (asection
*))));
2331 m
->p_type
= PT_LOAD
;
2332 for (i
= from
, hdrpp
= sections
+ from
; i
< to
; i
++, hdrpp
++)
2333 m
->sections
[i
- from
] = *hdrpp
;
2334 m
->count
= to
- from
;
2336 if (from
== 0 && phdr
)
2338 /* Include the headers in the first PT_LOAD segment. */
2339 m
->includes_filehdr
= 1;
2340 m
->includes_phdrs
= 1;
2346 /* Set up a mapping from BFD sections to program segments. */
2349 map_sections_to_segments (abfd
)
2352 asection
**sections
= NULL
;
2356 struct elf_segment_map
*mfirst
;
2357 struct elf_segment_map
**pm
;
2358 struct elf_segment_map
*m
;
2360 unsigned int phdr_index
;
2361 bfd_vma maxpagesize
;
2363 boolean phdr_in_segment
= true;
2367 if (elf_tdata (abfd
)->segment_map
!= NULL
)
2370 if (bfd_count_sections (abfd
) == 0)
2373 /* Select the allocated sections, and sort them. */
2375 sections
= (asection
**) bfd_malloc (bfd_count_sections (abfd
)
2376 * sizeof (asection
*));
2377 if (sections
== NULL
)
2381 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
2383 if ((s
->flags
& SEC_ALLOC
) != 0)
2389 BFD_ASSERT (i
<= bfd_count_sections (abfd
));
2392 qsort (sections
, (size_t) count
, sizeof (asection
*), elf_sort_sections
);
2394 /* Build the mapping. */
2399 /* If we have a .interp section, then create a PT_PHDR segment for
2400 the program headers and a PT_INTERP segment for the .interp
2402 s
= bfd_get_section_by_name (abfd
, ".interp");
2403 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0)
2405 m
= ((struct elf_segment_map
*)
2406 bfd_zalloc (abfd
, sizeof (struct elf_segment_map
)));
2410 m
->p_type
= PT_PHDR
;
2411 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
2412 m
->p_flags
= PF_R
| PF_X
;
2413 m
->p_flags_valid
= 1;
2414 m
->includes_phdrs
= 1;
2419 m
= ((struct elf_segment_map
*)
2420 bfd_zalloc (abfd
, sizeof (struct elf_segment_map
)));
2424 m
->p_type
= PT_INTERP
;
2432 /* Look through the sections. We put sections in the same program
2433 segment when the start of the second section can be placed within
2434 a few bytes of the end of the first section. */
2437 maxpagesize
= get_elf_backend_data (abfd
)->maxpagesize
;
2439 dynsec
= bfd_get_section_by_name (abfd
, ".dynamic");
2441 && (dynsec
->flags
& SEC_LOAD
) == 0)
2444 /* Deal with -Ttext or something similar such that the first section
2445 is not adjacent to the program headers. This is an
2446 approximation, since at this point we don't know exactly how many
2447 program headers we will need. */
2450 bfd_size_type phdr_size
;
2452 phdr_size
= elf_tdata (abfd
)->program_header_size
;
2454 phdr_size
= get_elf_backend_data (abfd
)->s
->sizeof_phdr
;
2455 if ((abfd
->flags
& D_PAGED
) == 0
2456 || sections
[0]->lma
< phdr_size
2457 || sections
[0]->lma
% maxpagesize
< phdr_size
% maxpagesize
)
2458 phdr_in_segment
= false;
2461 for (i
= 0, hdrpp
= sections
; i
< count
; i
++, hdrpp
++)
2464 boolean new_segment
;
2468 /* See if this section and the last one will fit in the same
2471 if (last_hdr
== NULL
)
2473 /* If we don't have a segment yet, then we don't need a new
2474 one (we build the last one after this loop). */
2475 new_segment
= false;
2477 else if (last_hdr
->lma
- last_hdr
->vma
!= hdr
->lma
- hdr
->vma
)
2479 /* If this section has a different relation between the
2480 virtual address and the load address, then we need a new
2484 else if (BFD_ALIGN (last_hdr
->lma
+ last_hdr
->_raw_size
, maxpagesize
)
2485 < BFD_ALIGN (hdr
->lma
, maxpagesize
))
2487 /* If putting this section in this segment would force us to
2488 skip a page in the segment, then we need a new segment. */
2491 else if ((last_hdr
->flags
& SEC_LOAD
) == 0
2492 && (hdr
->flags
& SEC_LOAD
) != 0)
2494 /* We don't want to put a loadable section after a
2495 nonloadable section in the same segment. */
2498 else if ((abfd
->flags
& D_PAGED
) == 0)
2500 /* If the file is not demand paged, which means that we
2501 don't require the sections to be correctly aligned in the
2502 file, then there is no other reason for a new segment. */
2503 new_segment
= false;
2506 && (hdr
->flags
& SEC_READONLY
) == 0
2507 && (BFD_ALIGN (last_hdr
->lma
+ last_hdr
->_raw_size
, maxpagesize
)
2510 /* We don't want to put a writable section in a read only
2511 segment, unless they are on the same page in memory
2512 anyhow. We already know that the last section does not
2513 bring us past the current section on the page, so the
2514 only case in which the new section is not on the same
2515 page as the previous section is when the previous section
2516 ends precisely on a page boundary. */
2521 /* Otherwise, we can use the same segment. */
2522 new_segment
= false;
2527 if ((hdr
->flags
& SEC_READONLY
) == 0)
2533 /* We need a new program segment. We must create a new program
2534 header holding all the sections from phdr_index until hdr. */
2536 m
= make_mapping (abfd
, sections
, phdr_index
, i
, phdr_in_segment
);
2543 if ((hdr
->flags
& SEC_READONLY
) == 0)
2550 phdr_in_segment
= false;
2553 /* Create a final PT_LOAD program segment. */
2554 if (last_hdr
!= NULL
)
2556 m
= make_mapping (abfd
, sections
, phdr_index
, i
, phdr_in_segment
);
2564 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
2567 m
= ((struct elf_segment_map
*)
2568 bfd_zalloc (abfd
, sizeof (struct elf_segment_map
)));
2572 m
->p_type
= PT_DYNAMIC
;
2574 m
->sections
[0] = dynsec
;
2580 /* For each loadable .note section, add a PT_NOTE segment. We don't
2581 use bfd_get_section_by_name, because if we link together
2582 nonloadable .note sections and loadable .note sections, we will
2583 generate two .note sections in the output file. FIXME: Using
2584 names for section types is bogus anyhow. */
2585 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
2587 if ((s
->flags
& SEC_LOAD
) != 0
2588 && strncmp (s
->name
, ".note", 5) == 0)
2590 m
= ((struct elf_segment_map
*)
2591 bfd_zalloc (abfd
, sizeof (struct elf_segment_map
)));
2595 m
->p_type
= PT_NOTE
;
2607 elf_tdata (abfd
)->segment_map
= mfirst
;
2611 if (sections
!= NULL
)
2616 /* Sort sections by address. */
2619 elf_sort_sections (arg1
, arg2
)
2623 const asection
*sec1
= *(const asection
**) arg1
;
2624 const asection
*sec2
= *(const asection
**) arg2
;
2626 /* Sort by LMA first, since this is the address used to
2627 place the section into a segment. */
2628 if (sec1
->lma
< sec2
->lma
)
2630 else if (sec1
->lma
> sec2
->lma
)
2633 /* Then sort by VMA. Normally the LMA and the VMA will be
2634 the same, and this will do nothing. */
2635 if (sec1
->vma
< sec2
->vma
)
2637 else if (sec1
->vma
> sec2
->vma
)
2640 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
2642 #define TOEND(x) (((x)->flags & SEC_LOAD) == 0)
2647 return sec1
->target_index
- sec2
->target_index
;
2657 /* Sort by size, to put zero sized sections before others at the
2660 if (sec1
->_raw_size
< sec2
->_raw_size
)
2662 if (sec1
->_raw_size
> sec2
->_raw_size
)
2665 return sec1
->target_index
- sec2
->target_index
;
2668 /* Assign file positions to the sections based on the mapping from
2669 sections to segments. This function also sets up some fields in
2670 the file header, and writes out the program headers. */
2673 assign_file_positions_for_segments (abfd
)
2676 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2678 struct elf_segment_map
*m
;
2680 Elf_Internal_Phdr
*phdrs
;
2682 bfd_vma filehdr_vaddr
, filehdr_paddr
;
2683 bfd_vma phdrs_vaddr
, phdrs_paddr
;
2684 Elf_Internal_Phdr
*p
;
2686 if (elf_tdata (abfd
)->segment_map
== NULL
)
2688 if (! map_sections_to_segments (abfd
))
2692 if (bed
->elf_backend_modify_segment_map
)
2694 if (! (*bed
->elf_backend_modify_segment_map
) (abfd
))
2699 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
2702 elf_elfheader (abfd
)->e_phoff
= bed
->s
->sizeof_ehdr
;
2703 elf_elfheader (abfd
)->e_phentsize
= bed
->s
->sizeof_phdr
;
2704 elf_elfheader (abfd
)->e_phnum
= count
;
2709 /* If we already counted the number of program segments, make sure
2710 that we allocated enough space. This happens when SIZEOF_HEADERS
2711 is used in a linker script. */
2712 alloc
= elf_tdata (abfd
)->program_header_size
/ bed
->s
->sizeof_phdr
;
2713 if (alloc
!= 0 && count
> alloc
)
2715 ((*_bfd_error_handler
)
2716 (_("%s: Not enough room for program headers (allocated %u, need %u)"),
2717 bfd_get_filename (abfd
), alloc
, count
));
2718 bfd_set_error (bfd_error_bad_value
);
2725 phdrs
= ((Elf_Internal_Phdr
*)
2726 bfd_alloc (abfd
, alloc
* sizeof (Elf_Internal_Phdr
)));
2730 off
= bed
->s
->sizeof_ehdr
;
2731 off
+= alloc
* bed
->s
->sizeof_phdr
;
2738 for (m
= elf_tdata (abfd
)->segment_map
, p
= phdrs
;
2745 /* If elf_segment_map is not from map_sections_to_segments, the
2746 sections may not be correctly ordered. */
2748 qsort (m
->sections
, (size_t) m
->count
, sizeof (asection
*),
2751 p
->p_type
= m
->p_type
;
2752 p
->p_flags
= m
->p_flags
;
2754 if (p
->p_type
== PT_LOAD
2756 && (m
->sections
[0]->flags
& SEC_ALLOC
) != 0)
2758 if ((abfd
->flags
& D_PAGED
) != 0)
2759 off
+= (m
->sections
[0]->vma
- off
) % bed
->maxpagesize
;
2762 bfd_size_type align
;
2765 for (i
= 0, secpp
= m
->sections
; i
< m
->count
; i
++, secpp
++)
2767 bfd_size_type secalign
;
2769 secalign
= bfd_get_section_alignment (abfd
, *secpp
);
2770 if (secalign
> align
)
2774 off
+= (m
->sections
[0]->vma
- off
) % (1 << align
);
2781 p
->p_vaddr
= m
->sections
[0]->vma
;
2783 if (m
->p_paddr_valid
)
2784 p
->p_paddr
= m
->p_paddr
;
2785 else if (m
->count
== 0)
2788 p
->p_paddr
= m
->sections
[0]->lma
;
2790 if (p
->p_type
== PT_LOAD
2791 && (abfd
->flags
& D_PAGED
) != 0)
2792 p
->p_align
= bed
->maxpagesize
;
2793 else if (m
->count
== 0)
2794 p
->p_align
= bed
->s
->file_align
;
2802 if (m
->includes_filehdr
)
2804 if (! m
->p_flags_valid
)
2807 p
->p_filesz
= bed
->s
->sizeof_ehdr
;
2808 p
->p_memsz
= bed
->s
->sizeof_ehdr
;
2811 BFD_ASSERT (p
->p_type
== PT_LOAD
);
2813 if (p
->p_vaddr
< (bfd_vma
) off
)
2815 _bfd_error_handler (_("%s: Not enough room for program headers, try linking with -N"),
2816 bfd_get_filename (abfd
));
2817 bfd_set_error (bfd_error_bad_value
);
2822 if (! m
->p_paddr_valid
)
2825 if (p
->p_type
== PT_LOAD
)
2827 filehdr_vaddr
= p
->p_vaddr
;
2828 filehdr_paddr
= p
->p_paddr
;
2832 if (m
->includes_phdrs
)
2834 if (! m
->p_flags_valid
)
2837 if (m
->includes_filehdr
)
2839 if (p
->p_type
== PT_LOAD
)
2841 phdrs_vaddr
= p
->p_vaddr
+ bed
->s
->sizeof_ehdr
;
2842 phdrs_paddr
= p
->p_paddr
+ bed
->s
->sizeof_ehdr
;
2847 p
->p_offset
= bed
->s
->sizeof_ehdr
;
2851 BFD_ASSERT (p
->p_type
== PT_LOAD
);
2852 p
->p_vaddr
-= off
- p
->p_offset
;
2853 if (! m
->p_paddr_valid
)
2854 p
->p_paddr
-= off
- p
->p_offset
;
2857 if (p
->p_type
== PT_LOAD
)
2859 phdrs_vaddr
= p
->p_vaddr
;
2860 phdrs_paddr
= p
->p_paddr
;
2863 phdrs_vaddr
= bed
->maxpagesize
+ bed
->s
->sizeof_ehdr
;
2866 p
->p_filesz
+= alloc
* bed
->s
->sizeof_phdr
;
2867 p
->p_memsz
+= alloc
* bed
->s
->sizeof_phdr
;
2870 if (p
->p_type
== PT_LOAD
2871 || (p
->p_type
== PT_NOTE
&& bfd_get_format (abfd
) == bfd_core
))
2873 if (! m
->includes_filehdr
&& ! m
->includes_phdrs
)
2879 adjust
= off
- (p
->p_offset
+ p
->p_filesz
);
2880 p
->p_filesz
+= adjust
;
2881 p
->p_memsz
+= adjust
;
2887 for (i
= 0, secpp
= m
->sections
; i
< m
->count
; i
++, secpp
++)
2891 bfd_size_type align
;
2895 align
= 1 << bfd_get_section_alignment (abfd
, sec
);
2897 /* The section may have artificial alignment forced by a
2898 link script. Notice this case by the gap between the
2899 cumulative phdr vma and the section's vma. */
2900 if (p
->p_vaddr
+ p
->p_memsz
< sec
->vma
)
2902 bfd_vma adjust
= sec
->vma
- (p
->p_vaddr
+ p
->p_memsz
);
2904 p
->p_memsz
+= adjust
;
2907 if ((flags
& SEC_LOAD
) != 0)
2908 p
->p_filesz
+= adjust
;
2911 if (p
->p_type
== PT_LOAD
)
2913 bfd_signed_vma adjust
;
2915 if ((flags
& SEC_LOAD
) != 0)
2917 adjust
= sec
->lma
- (p
->p_paddr
+ p
->p_memsz
);
2921 else if ((flags
& SEC_ALLOC
) != 0)
2923 /* The section VMA must equal the file position
2924 modulo the page size. FIXME: I'm not sure if
2925 this adjustment is really necessary. We used to
2926 not have the SEC_LOAD case just above, and then
2927 this was necessary, but now I'm not sure. */
2928 if ((abfd
->flags
& D_PAGED
) != 0)
2929 adjust
= (sec
->vma
- voff
) % bed
->maxpagesize
;
2931 adjust
= (sec
->vma
- voff
) % align
;
2940 (* _bfd_error_handler
)
2941 (_("Error: First section in segment (%s) starts at 0x%x"),
2942 bfd_section_name (abfd
, sec
), sec
->lma
);
2943 (* _bfd_error_handler
)
2944 (_(" whereas segment starts at 0x%x"),
2949 p
->p_memsz
+= adjust
;
2952 if ((flags
& SEC_LOAD
) != 0)
2953 p
->p_filesz
+= adjust
;
2958 /* We check SEC_HAS_CONTENTS here because if NOLOAD is
2959 used in a linker script we may have a section with
2960 SEC_LOAD clear but which is supposed to have
2962 if ((flags
& SEC_LOAD
) != 0
2963 || (flags
& SEC_HAS_CONTENTS
) != 0)
2964 off
+= sec
->_raw_size
;
2966 if ((flags
& SEC_ALLOC
) != 0)
2967 voff
+= sec
->_raw_size
;
2970 if (p
->p_type
== PT_NOTE
&& bfd_get_format (abfd
) == bfd_core
)
2972 /* The actual "note" segment has i == 0.
2973 This is the one that actually contains everything. */
2977 p
->p_filesz
= sec
->_raw_size
;
2978 off
+= sec
->_raw_size
;
2983 /* Fake sections -- don't need to be written. */
2986 flags
= sec
->flags
= 0;
2993 p
->p_memsz
+= sec
->_raw_size
;
2995 if ((flags
& SEC_LOAD
) != 0)
2996 p
->p_filesz
+= sec
->_raw_size
;
2998 if (align
> p
->p_align
2999 && (p
->p_type
!= PT_LOAD
|| (abfd
->flags
& D_PAGED
) == 0))
3003 if (! m
->p_flags_valid
)
3006 if ((flags
& SEC_CODE
) != 0)
3008 if ((flags
& SEC_READONLY
) == 0)
3014 /* Now that we have set the section file positions, we can set up
3015 the file positions for the non PT_LOAD segments. */
3016 for (m
= elf_tdata (abfd
)->segment_map
, p
= phdrs
;
3020 if (p
->p_type
!= PT_LOAD
&& m
->count
> 0)
3022 BFD_ASSERT (! m
->includes_filehdr
&& ! m
->includes_phdrs
);
3023 p
->p_offset
= m
->sections
[0]->filepos
;
3027 if (m
->includes_filehdr
)
3029 p
->p_vaddr
= filehdr_vaddr
;
3030 if (! m
->p_paddr_valid
)
3031 p
->p_paddr
= filehdr_paddr
;
3033 else if (m
->includes_phdrs
)
3035 p
->p_vaddr
= phdrs_vaddr
;
3036 if (! m
->p_paddr_valid
)
3037 p
->p_paddr
= phdrs_paddr
;
3042 /* Clear out any program headers we allocated but did not use. */
3043 for (; count
< alloc
; count
++, p
++)
3045 memset (p
, 0, sizeof *p
);
3046 p
->p_type
= PT_NULL
;
3049 elf_tdata (abfd
)->phdr
= phdrs
;
3051 elf_tdata (abfd
)->next_file_pos
= off
;
3053 /* Write out the program headers. */
3054 if (bfd_seek (abfd
, bed
->s
->sizeof_ehdr
, SEEK_SET
) != 0
3055 || bed
->s
->write_out_phdrs (abfd
, phdrs
, alloc
) != 0)
3061 /* Get the size of the program header.
3063 If this is called by the linker before any of the section VMA's are set, it
3064 can't calculate the correct value for a strange memory layout. This only
3065 happens when SIZEOF_HEADERS is used in a linker script. In this case,
3066 SORTED_HDRS is NULL and we assume the normal scenario of one text and one
3067 data segment (exclusive of .interp and .dynamic).
3069 ??? User written scripts must either not use SIZEOF_HEADERS, or assume there
3070 will be two segments. */
3072 static bfd_size_type
3073 get_program_header_size (abfd
)
3078 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3080 /* We can't return a different result each time we're called. */
3081 if (elf_tdata (abfd
)->program_header_size
!= 0)
3082 return elf_tdata (abfd
)->program_header_size
;
3084 if (elf_tdata (abfd
)->segment_map
!= NULL
)
3086 struct elf_segment_map
*m
;
3089 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
3091 elf_tdata (abfd
)->program_header_size
= segs
* bed
->s
->sizeof_phdr
;
3092 return elf_tdata (abfd
)->program_header_size
;
3095 /* Assume we will need exactly two PT_LOAD segments: one for text
3096 and one for data. */
3099 s
= bfd_get_section_by_name (abfd
, ".interp");
3100 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0)
3102 /* If we have a loadable interpreter section, we need a
3103 PT_INTERP segment. In this case, assume we also need a
3104 PT_PHDR segment, although that may not be true for all
3109 if (bfd_get_section_by_name (abfd
, ".dynamic") != NULL
)
3111 /* We need a PT_DYNAMIC segment. */
3115 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
3117 if ((s
->flags
& SEC_LOAD
) != 0
3118 && strncmp (s
->name
, ".note", 5) == 0)
3120 /* We need a PT_NOTE segment. */
3125 /* Let the backend count up any program headers it might need. */
3126 if (bed
->elf_backend_additional_program_headers
)
3130 a
= (*bed
->elf_backend_additional_program_headers
) (abfd
);
3136 elf_tdata (abfd
)->program_header_size
= segs
* bed
->s
->sizeof_phdr
;
3137 return elf_tdata (abfd
)->program_header_size
;
3140 /* Work out the file positions of all the sections. This is called by
3141 _bfd_elf_compute_section_file_positions. All the section sizes and
3142 VMAs must be known before this is called.
3144 We do not consider reloc sections at this point, unless they form
3145 part of the loadable image. Reloc sections are assigned file
3146 positions in assign_file_positions_for_relocs, which is called by
3147 write_object_contents and final_link.
3149 We also don't set the positions of the .symtab and .strtab here. */
3152 assign_file_positions_except_relocs (abfd
)
3155 struct elf_obj_tdata
* const tdata
= elf_tdata (abfd
);
3156 Elf_Internal_Ehdr
* const i_ehdrp
= elf_elfheader (abfd
);
3157 Elf_Internal_Shdr
** const i_shdrpp
= elf_elfsections (abfd
);
3159 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3161 if ((abfd
->flags
& (EXEC_P
| DYNAMIC
)) == 0
3162 && bfd_get_format (abfd
) != bfd_core
)
3164 Elf_Internal_Shdr
**hdrpp
;
3167 /* Start after the ELF header. */
3168 off
= i_ehdrp
->e_ehsize
;
3170 /* We are not creating an executable, which means that we are
3171 not creating a program header, and that the actual order of
3172 the sections in the file is unimportant. */
3173 for (i
= 1, hdrpp
= i_shdrpp
+ 1; i
< i_ehdrp
->e_shnum
; i
++, hdrpp
++)
3175 Elf_Internal_Shdr
*hdr
;
3178 if (hdr
->sh_type
== SHT_REL
|| hdr
->sh_type
== SHT_RELA
)
3180 hdr
->sh_offset
= -1;
3183 if (i
== tdata
->symtab_section
3184 || i
== tdata
->strtab_section
)
3186 hdr
->sh_offset
= -1;
3190 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, true);
3196 Elf_Internal_Shdr
**hdrpp
;
3198 /* Assign file positions for the loaded sections based on the
3199 assignment of sections to segments. */
3200 if (! assign_file_positions_for_segments (abfd
))
3203 /* Assign file positions for the other sections. */
3205 off
= elf_tdata (abfd
)->next_file_pos
;
3206 for (i
= 1, hdrpp
= i_shdrpp
+ 1; i
< i_ehdrp
->e_shnum
; i
++, hdrpp
++)
3208 Elf_Internal_Shdr
*hdr
;
3211 if (hdr
->bfd_section
!= NULL
3212 && hdr
->bfd_section
->filepos
!= 0)
3213 hdr
->sh_offset
= hdr
->bfd_section
->filepos
;
3214 else if ((hdr
->sh_flags
& SHF_ALLOC
) != 0)
3216 ((*_bfd_error_handler
)
3217 (_("%s: warning: allocated section `%s' not in segment"),
3218 bfd_get_filename (abfd
),
3219 (hdr
->bfd_section
== NULL
3221 : hdr
->bfd_section
->name
)));
3222 if ((abfd
->flags
& D_PAGED
) != 0)
3223 off
+= (hdr
->sh_addr
- off
) % bed
->maxpagesize
;
3225 off
+= (hdr
->sh_addr
- off
) % hdr
->sh_addralign
;
3226 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
,
3229 else if (hdr
->sh_type
== SHT_REL
3230 || hdr
->sh_type
== SHT_RELA
3231 || hdr
== i_shdrpp
[tdata
->symtab_section
]
3232 || hdr
== i_shdrpp
[tdata
->strtab_section
])
3233 hdr
->sh_offset
= -1;
3235 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, true);
3239 /* Place the section headers. */
3240 off
= align_file_position (off
, bed
->s
->file_align
);
3241 i_ehdrp
->e_shoff
= off
;
3242 off
+= i_ehdrp
->e_shnum
* i_ehdrp
->e_shentsize
;
3244 elf_tdata (abfd
)->next_file_pos
= off
;
3253 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
3254 Elf_Internal_Phdr
*i_phdrp
= 0; /* Program header table, internal form */
3255 Elf_Internal_Shdr
**i_shdrp
; /* Section header table, internal form */
3257 struct bfd_strtab_hash
*shstrtab
;
3258 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3260 i_ehdrp
= elf_elfheader (abfd
);
3261 i_shdrp
= elf_elfsections (abfd
);
3263 shstrtab
= _bfd_elf_stringtab_init ();
3264 if (shstrtab
== NULL
)
3267 elf_shstrtab (abfd
) = shstrtab
;
3269 i_ehdrp
->e_ident
[EI_MAG0
] = ELFMAG0
;
3270 i_ehdrp
->e_ident
[EI_MAG1
] = ELFMAG1
;
3271 i_ehdrp
->e_ident
[EI_MAG2
] = ELFMAG2
;
3272 i_ehdrp
->e_ident
[EI_MAG3
] = ELFMAG3
;
3274 i_ehdrp
->e_ident
[EI_CLASS
] = bed
->s
->elfclass
;
3275 i_ehdrp
->e_ident
[EI_DATA
] =
3276 bfd_big_endian (abfd
) ? ELFDATA2MSB
: ELFDATA2LSB
;
3277 i_ehdrp
->e_ident
[EI_VERSION
] = bed
->s
->ev_current
;
3279 i_ehdrp
->e_ident
[EI_OSABI
] = ELFOSABI_NONE
;
3280 i_ehdrp
->e_ident
[EI_ABIVERSION
] = 0;
3282 for (count
= EI_PAD
; count
< EI_NIDENT
; count
++)
3283 i_ehdrp
->e_ident
[count
] = 0;
3285 if ((abfd
->flags
& DYNAMIC
) != 0)
3286 i_ehdrp
->e_type
= ET_DYN
;
3287 else if ((abfd
->flags
& EXEC_P
) != 0)
3288 i_ehdrp
->e_type
= ET_EXEC
;
3289 else if (bfd_get_format (abfd
) == bfd_core
)
3290 i_ehdrp
->e_type
= ET_CORE
;
3292 i_ehdrp
->e_type
= ET_REL
;
3294 switch (bfd_get_arch (abfd
))
3296 case bfd_arch_unknown
:
3297 i_ehdrp
->e_machine
= EM_NONE
;
3299 case bfd_arch_sparc
:
3300 if (bfd_get_arch_size (abfd
) == 64)
3301 i_ehdrp
->e_machine
= EM_SPARCV9
;
3303 i_ehdrp
->e_machine
= EM_SPARC
;
3306 i_ehdrp
->e_machine
= EM_S370
;
3309 i_ehdrp
->e_machine
= EM_386
;
3312 i_ehdrp
->e_machine
= EM_IA_64
;
3314 case bfd_arch_m68hc11
:
3315 i_ehdrp
->e_machine
= EM_68HC11
;
3317 case bfd_arch_m68hc12
:
3318 i_ehdrp
->e_machine
= EM_68HC12
;
3321 i_ehdrp
->e_machine
= EM_68K
;
3324 i_ehdrp
->e_machine
= EM_88K
;
3327 i_ehdrp
->e_machine
= EM_860
;
3330 i_ehdrp
->e_machine
= EM_960
;
3332 case bfd_arch_mips
: /* MIPS Rxxxx */
3333 i_ehdrp
->e_machine
= EM_MIPS
; /* only MIPS R3000 */
3336 i_ehdrp
->e_machine
= EM_PARISC
;
3338 case bfd_arch_powerpc
:
3339 i_ehdrp
->e_machine
= EM_PPC
;
3341 case bfd_arch_alpha
:
3342 i_ehdrp
->e_machine
= EM_ALPHA
;
3345 i_ehdrp
->e_machine
= EM_SH
;
3348 i_ehdrp
->e_machine
= EM_CYGNUS_D10V
;
3351 i_ehdrp
->e_machine
= EM_CYGNUS_D30V
;
3354 i_ehdrp
->e_machine
= EM_CYGNUS_FR30
;
3356 case bfd_arch_mcore
:
3357 i_ehdrp
->e_machine
= EM_MCORE
;
3360 i_ehdrp
->e_machine
= EM_AVR
;
3363 switch (bfd_get_mach (abfd
))
3366 case 0: i_ehdrp
->e_machine
= EM_CYGNUS_V850
; break;
3370 i_ehdrp
->e_machine
= EM_CYGNUS_ARC
;
3373 i_ehdrp
->e_machine
= EM_ARM
;
3376 i_ehdrp
->e_machine
= EM_CYGNUS_M32R
;
3378 case bfd_arch_mn10200
:
3379 i_ehdrp
->e_machine
= EM_CYGNUS_MN10200
;
3381 case bfd_arch_mn10300
:
3382 i_ehdrp
->e_machine
= EM_CYGNUS_MN10300
;
3385 i_ehdrp
->e_machine
= EM_PJ
;
3388 i_ehdrp
->e_machine
= EM_CRIS
;
3390 /* also note that EM_M32, AT&T WE32100 is unknown to bfd */
3392 i_ehdrp
->e_machine
= EM_NONE
;
3394 i_ehdrp
->e_version
= bed
->s
->ev_current
;
3395 i_ehdrp
->e_ehsize
= bed
->s
->sizeof_ehdr
;
3397 /* No program header, for now. */
3398 i_ehdrp
->e_phoff
= 0;
3399 i_ehdrp
->e_phentsize
= 0;
3400 i_ehdrp
->e_phnum
= 0;
3402 /* Each bfd section is section header entry. */
3403 i_ehdrp
->e_entry
= bfd_get_start_address (abfd
);
3404 i_ehdrp
->e_shentsize
= bed
->s
->sizeof_shdr
;
3406 /* If we're building an executable, we'll need a program header table. */
3407 if (abfd
->flags
& EXEC_P
)
3409 /* It all happens later. */
3411 i_ehdrp
->e_phentsize
= sizeof (Elf_External_Phdr
);
3413 /* elf_build_phdrs() returns a (NULL-terminated) array of
3414 Elf_Internal_Phdrs. */
3415 i_phdrp
= elf_build_phdrs (abfd
, i_ehdrp
, i_shdrp
, &i_ehdrp
->e_phnum
);
3416 i_ehdrp
->e_phoff
= outbase
;
3417 outbase
+= i_ehdrp
->e_phentsize
* i_ehdrp
->e_phnum
;
3422 i_ehdrp
->e_phentsize
= 0;
3424 i_ehdrp
->e_phoff
= 0;
3427 elf_tdata (abfd
)->symtab_hdr
.sh_name
=
3428 (unsigned int) _bfd_stringtab_add (shstrtab
, ".symtab", true, false);
3429 elf_tdata (abfd
)->strtab_hdr
.sh_name
=
3430 (unsigned int) _bfd_stringtab_add (shstrtab
, ".strtab", true, false);
3431 elf_tdata (abfd
)->shstrtab_hdr
.sh_name
=
3432 (unsigned int) _bfd_stringtab_add (shstrtab
, ".shstrtab", true, false);
3433 if (elf_tdata (abfd
)->symtab_hdr
.sh_name
== (unsigned int) -1
3434 || elf_tdata (abfd
)->symtab_hdr
.sh_name
== (unsigned int) -1
3435 || elf_tdata (abfd
)->shstrtab_hdr
.sh_name
== (unsigned int) -1)
3441 /* Assign file positions for all the reloc sections which are not part
3442 of the loadable file image. */
3445 _bfd_elf_assign_file_positions_for_relocs (abfd
)
3450 Elf_Internal_Shdr
**shdrpp
;
3452 off
= elf_tdata (abfd
)->next_file_pos
;
3454 for (i
= 1, shdrpp
= elf_elfsections (abfd
) + 1;
3455 i
< elf_elfheader (abfd
)->e_shnum
;
3458 Elf_Internal_Shdr
*shdrp
;
3461 if ((shdrp
->sh_type
== SHT_REL
|| shdrp
->sh_type
== SHT_RELA
)
3462 && shdrp
->sh_offset
== -1)
3463 off
= _bfd_elf_assign_file_position_for_section (shdrp
, off
, true);
3466 elf_tdata (abfd
)->next_file_pos
= off
;
3470 _bfd_elf_write_object_contents (abfd
)
3473 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3474 Elf_Internal_Ehdr
*i_ehdrp
;
3475 Elf_Internal_Shdr
**i_shdrp
;
3479 if (! abfd
->output_has_begun
3480 && ! _bfd_elf_compute_section_file_positions
3481 (abfd
, (struct bfd_link_info
*) NULL
))
3484 i_shdrp
= elf_elfsections (abfd
);
3485 i_ehdrp
= elf_elfheader (abfd
);
3488 bfd_map_over_sections (abfd
, bed
->s
->write_relocs
, &failed
);
3492 _bfd_elf_assign_file_positions_for_relocs (abfd
);
3494 /* After writing the headers, we need to write the sections too... */
3495 for (count
= 1; count
< i_ehdrp
->e_shnum
; count
++)
3497 if (bed
->elf_backend_section_processing
)
3498 (*bed
->elf_backend_section_processing
) (abfd
, i_shdrp
[count
]);
3499 if (i_shdrp
[count
]->contents
)
3501 if (bfd_seek (abfd
, i_shdrp
[count
]->sh_offset
, SEEK_SET
) != 0
3502 || (bfd_write (i_shdrp
[count
]->contents
, i_shdrp
[count
]->sh_size
,
3504 != i_shdrp
[count
]->sh_size
))
3509 /* Write out the section header names. */
3510 if (bfd_seek (abfd
, elf_tdata (abfd
)->shstrtab_hdr
.sh_offset
, SEEK_SET
) != 0
3511 || ! _bfd_stringtab_emit (abfd
, elf_shstrtab (abfd
)))
3514 if (bed
->elf_backend_final_write_processing
)
3515 (*bed
->elf_backend_final_write_processing
) (abfd
,
3516 elf_tdata (abfd
)->linker
);
3518 return bed
->s
->write_shdrs_and_ehdr (abfd
);
3522 _bfd_elf_write_corefile_contents (abfd
)
3525 /* Hopefully this can be done just like an object file. */
3526 return _bfd_elf_write_object_contents (abfd
);
3529 /* Given a section, search the header to find them. */
3532 _bfd_elf_section_from_bfd_section (abfd
, asect
)
3536 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3537 Elf_Internal_Shdr
**i_shdrp
= elf_elfsections (abfd
);
3539 Elf_Internal_Shdr
*hdr
;
3540 int maxindex
= elf_elfheader (abfd
)->e_shnum
;
3542 for (index
= 0; index
< maxindex
; index
++)
3544 hdr
= i_shdrp
[index
];
3545 if (hdr
->bfd_section
== asect
)
3549 if (bed
->elf_backend_section_from_bfd_section
)
3551 for (index
= 0; index
< maxindex
; index
++)
3555 hdr
= i_shdrp
[index
];
3557 if ((*bed
->elf_backend_section_from_bfd_section
)
3558 (abfd
, hdr
, asect
, &retval
))
3563 if (bfd_is_abs_section (asect
))
3565 if (bfd_is_com_section (asect
))
3567 if (bfd_is_und_section (asect
))
3570 bfd_set_error (bfd_error_nonrepresentable_section
);
3575 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
3579 _bfd_elf_symbol_from_bfd_symbol (abfd
, asym_ptr_ptr
)
3581 asymbol
**asym_ptr_ptr
;
3583 asymbol
*asym_ptr
= *asym_ptr_ptr
;
3585 flagword flags
= asym_ptr
->flags
;
3587 /* When gas creates relocations against local labels, it creates its
3588 own symbol for the section, but does put the symbol into the
3589 symbol chain, so udata is 0. When the linker is generating
3590 relocatable output, this section symbol may be for one of the
3591 input sections rather than the output section. */
3592 if (asym_ptr
->udata
.i
== 0
3593 && (flags
& BSF_SECTION_SYM
)
3594 && asym_ptr
->section
)
3598 if (asym_ptr
->section
->output_section
!= NULL
)
3599 indx
= asym_ptr
->section
->output_section
->index
;
3601 indx
= asym_ptr
->section
->index
;
3602 if (elf_section_syms (abfd
)[indx
])
3603 asym_ptr
->udata
.i
= elf_section_syms (abfd
)[indx
]->udata
.i
;
3606 idx
= asym_ptr
->udata
.i
;
3610 /* This case can occur when using --strip-symbol on a symbol
3611 which is used in a relocation entry. */
3612 (*_bfd_error_handler
)
3613 (_("%s: symbol `%s' required but not present"),
3614 bfd_get_filename (abfd
), bfd_asymbol_name (asym_ptr
));
3615 bfd_set_error (bfd_error_no_symbols
);
3622 _("elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n"),
3623 (long) asym_ptr
, asym_ptr
->name
, idx
, flags
,
3624 elf_symbol_flags (flags
));
3632 /* Copy private BFD data. This copies any program header information. */
3635 copy_private_bfd_data (ibfd
, obfd
)
3639 Elf_Internal_Ehdr
* iehdr
;
3640 struct elf_segment_map
* map
;
3641 struct elf_segment_map
* map_first
;
3642 struct elf_segment_map
** pointer_to_map
;
3643 Elf_Internal_Phdr
* segment
;
3646 unsigned int num_segments
;
3647 boolean phdr_included
= false;
3648 bfd_vma maxpagesize
;
3649 struct elf_segment_map
* phdr_adjust_seg
= NULL
;
3650 unsigned int phdr_adjust_num
= 0;
3652 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
3653 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
3656 if (elf_tdata (ibfd
)->phdr
== NULL
)
3659 iehdr
= elf_elfheader (ibfd
);
3662 pointer_to_map
= &map_first
;
3664 num_segments
= elf_elfheader (ibfd
)->e_phnum
;
3665 maxpagesize
= get_elf_backend_data (obfd
)->maxpagesize
;
3667 /* Returns the end address of the segment + 1. */
3668 #define SEGMENT_END(segment, start) \
3669 (start + (segment->p_memsz > segment->p_filesz \
3670 ? segment->p_memsz : segment->p_filesz))
3672 /* Returns true if the given section is contained within
3673 the given segment. VMA addresses are compared. */
3674 #define IS_CONTAINED_BY_VMA(section, segment) \
3675 (section->vma >= segment->p_vaddr \
3676 && (section->vma + section->_raw_size) \
3677 <= (SEGMENT_END (segment, segment->p_vaddr)))
3679 /* Returns true if the given section is contained within
3680 the given segment. LMA addresses are compared. */
3681 #define IS_CONTAINED_BY_LMA(section, segment, base) \
3682 (section->lma >= base \
3683 && (section->lma + section->_raw_size) \
3684 <= SEGMENT_END (segment, base))
3686 /* Special case: corefile "NOTE" section containing regs, prpsinfo etc. */
3687 #define IS_COREFILE_NOTE(p, s) \
3688 (p->p_type == PT_NOTE \
3689 && bfd_get_format (ibfd) == bfd_core \
3690 && s->vma == 0 && s->lma == 0 \
3691 && (bfd_vma) s->filepos >= p->p_offset \
3692 && (bfd_vma) s->filepos + s->_raw_size \
3693 <= p->p_offset + p->p_filesz)
3695 /* The complicated case when p_vaddr is 0 is to handle the Solaris
3696 linker, which generates a PT_INTERP section with p_vaddr and
3697 p_memsz set to 0. */
3698 #define IS_SOLARIS_PT_INTERP(p, s) \
3700 && p->p_filesz > 0 \
3701 && (s->flags & SEC_HAS_CONTENTS) != 0 \
3702 && s->_raw_size > 0 \
3703 && (bfd_vma) s->filepos >= p->p_offset \
3704 && ((bfd_vma) s->filepos + s->_raw_size \
3705 <= p->p_offset + p->p_filesz))
3707 /* Decide if the given section should be included in the given segment.
3708 A section will be included if:
3709 1. It is within the address space of the segment,
3710 2. It is an allocated segment,
3711 3. There is an output section associated with it,
3712 4. The section has not already been allocated to a previous segment. */
3713 #define INCLUDE_SECTION_IN_SEGMENT(section, segment) \
3714 ((((IS_CONTAINED_BY_VMA (section, segment) \
3715 || IS_SOLARIS_PT_INTERP (segment, section)) \
3716 && (section->flags & SEC_ALLOC) != 0) \
3717 || IS_COREFILE_NOTE (segment, section)) \
3718 && section->output_section != NULL \
3719 && section->segment_mark == false)
3721 /* Returns true iff seg1 starts after the end of seg2. */
3722 #define SEGMENT_AFTER_SEGMENT(seg1, seg2) \
3723 (seg1->p_vaddr >= SEGMENT_END (seg2, seg2->p_vaddr))
3725 /* Returns true iff seg1 and seg2 overlap. */
3726 #define SEGMENT_OVERLAPS(seg1, seg2) \
3727 (!(SEGMENT_AFTER_SEGMENT (seg1, seg2) || SEGMENT_AFTER_SEGMENT (seg2, seg1)))
3729 /* Initialise the segment mark field. */
3730 for (section
= ibfd
->sections
; section
!= NULL
; section
= section
->next
)
3731 section
->segment_mark
= false;
3733 /* Scan through the segments specified in the program header
3734 of the input BFD. For this first scan we look for overlaps
3735 in the loadable segments. These can be created by wierd
3736 parameters to objcopy. */
3737 for (i
= 0, segment
= elf_tdata (ibfd
)->phdr
;
3742 Elf_Internal_Phdr
*segment2
;
3744 if (segment
->p_type
!= PT_LOAD
)
3747 /* Determine if this segment overlaps any previous segments. */
3748 for (j
= 0, segment2
= elf_tdata (ibfd
)->phdr
; j
< i
; j
++, segment2
++)
3750 bfd_signed_vma extra_length
;
3752 if (segment2
->p_type
!= PT_LOAD
3753 || ! SEGMENT_OVERLAPS (segment
, segment2
))
3756 /* Merge the two segments together. */
3757 if (segment2
->p_vaddr
< segment
->p_vaddr
)
3759 /* Extend SEGMENT2 to include SEGMENT and then delete
3762 SEGMENT_END (segment
, segment
->p_vaddr
)
3763 - SEGMENT_END (segment2
, segment2
->p_vaddr
);
3765 if (extra_length
> 0)
3767 segment2
->p_memsz
+= extra_length
;
3768 segment2
->p_filesz
+= extra_length
;
3771 segment
->p_type
= PT_NULL
;
3773 /* Since we have deleted P we must restart the outer loop. */
3775 segment
= elf_tdata (ibfd
)->phdr
;
3780 /* Extend SEGMENT to include SEGMENT2 and then delete
3783 SEGMENT_END (segment2
, segment2
->p_vaddr
)
3784 - SEGMENT_END (segment
, segment
->p_vaddr
);
3786 if (extra_length
> 0)
3788 segment
->p_memsz
+= extra_length
;
3789 segment
->p_filesz
+= extra_length
;
3792 segment2
->p_type
= PT_NULL
;
3797 /* The second scan attempts to assign sections to segments. */
3798 for (i
= 0, segment
= elf_tdata (ibfd
)->phdr
;
3802 unsigned int section_count
;
3803 asection
** sections
;
3804 asection
* output_section
;
3806 bfd_vma matching_lma
;
3807 bfd_vma suggested_lma
;
3810 if (segment
->p_type
== PT_NULL
)
3813 /* Compute how many sections might be placed into this segment. */
3815 for (section
= ibfd
->sections
; section
!= NULL
; section
= section
->next
)
3816 if (INCLUDE_SECTION_IN_SEGMENT (section
, segment
))
3819 /* Allocate a segment map big enough to contain all of the
3820 sections we have selected. */
3821 map
= ((struct elf_segment_map
*)
3823 (sizeof (struct elf_segment_map
)
3824 + ((size_t) section_count
- 1) * sizeof (asection
*))));
3828 /* Initialise the fields of the segment map. Default to
3829 using the physical address of the segment in the input BFD. */
3831 map
->p_type
= segment
->p_type
;
3832 map
->p_flags
= segment
->p_flags
;
3833 map
->p_flags_valid
= 1;
3834 map
->p_paddr
= segment
->p_paddr
;
3835 map
->p_paddr_valid
= 1;
3837 /* Determine if this segment contains the ELF file header
3838 and if it contains the program headers themselves. */
3839 map
->includes_filehdr
= (segment
->p_offset
== 0
3840 && segment
->p_filesz
>= iehdr
->e_ehsize
);
3842 map
->includes_phdrs
= 0;
3844 if (! phdr_included
|| segment
->p_type
!= PT_LOAD
)
3846 map
->includes_phdrs
=
3847 (segment
->p_offset
<= (bfd_vma
) iehdr
->e_phoff
3848 && (segment
->p_offset
+ segment
->p_filesz
3849 >= ((bfd_vma
) iehdr
->e_phoff
3850 + iehdr
->e_phnum
* iehdr
->e_phentsize
)));
3852 if (segment
->p_type
== PT_LOAD
&& map
->includes_phdrs
)
3853 phdr_included
= true;
3856 if (section_count
== 0)
3858 /* Special segments, such as the PT_PHDR segment, may contain
3859 no sections, but ordinary, loadable segments should contain
3861 if (segment
->p_type
== PT_LOAD
)
3863 (_("%s: warning: Empty loadable segment detected\n"),
3864 bfd_get_filename (ibfd
));
3867 *pointer_to_map
= map
;
3868 pointer_to_map
= &map
->next
;
3873 /* Now scan the sections in the input BFD again and attempt
3874 to add their corresponding output sections to the segment map.
3875 The problem here is how to handle an output section which has
3876 been moved (ie had its LMA changed). There are four possibilities:
3878 1. None of the sections have been moved.
3879 In this case we can continue to use the segment LMA from the
3882 2. All of the sections have been moved by the same amount.
3883 In this case we can change the segment's LMA to match the LMA
3884 of the first section.
3886 3. Some of the sections have been moved, others have not.
3887 In this case those sections which have not been moved can be
3888 placed in the current segment which will have to have its size,
3889 and possibly its LMA changed, and a new segment or segments will
3890 have to be created to contain the other sections.
3892 4. The sections have been moved, but not be the same amount.
3893 In this case we can change the segment's LMA to match the LMA
3894 of the first section and we will have to create a new segment
3895 or segments to contain the other sections.
3897 In order to save time, we allocate an array to hold the section
3898 pointers that we are interested in. As these sections get assigned
3899 to a segment, they are removed from this array. */
3901 sections
= (asection
**) bfd_malloc
3902 (sizeof (asection
*) * section_count
);
3903 if (sections
== NULL
)
3906 /* Step One: Scan for segment vs section LMA conflicts.
3907 Also add the sections to the section array allocated above.
3908 Also add the sections to the current segment. In the common
3909 case, where the sections have not been moved, this means that
3910 we have completely filled the segment, and there is nothing
3916 for (j
= 0, section
= ibfd
->sections
;
3918 section
= section
->next
)
3920 if (INCLUDE_SECTION_IN_SEGMENT (section
, segment
))
3922 output_section
= section
->output_section
;
3924 sections
[j
++] = section
;
3926 /* The Solaris native linker always sets p_paddr to 0.
3927 We try to catch that case here, and set it to the
3929 if (segment
->p_paddr
== 0
3930 && segment
->p_vaddr
!= 0
3932 && output_section
->lma
!= 0
3933 && (output_section
->vma
== (segment
->p_vaddr
3934 + (map
->includes_filehdr
3937 + (map
->includes_phdrs
3938 ? iehdr
->e_phnum
* iehdr
->e_phentsize
3940 map
->p_paddr
= segment
->p_vaddr
;
3942 /* Match up the physical address of the segment with the
3943 LMA address of the output section. */
3944 if (IS_CONTAINED_BY_LMA (output_section
, segment
, map
->p_paddr
)
3945 || IS_COREFILE_NOTE (segment
, section
))
3947 if (matching_lma
== 0)
3948 matching_lma
= output_section
->lma
;
3950 /* We assume that if the section fits within the segment
3951 then it does not overlap any other section within that
3953 map
->sections
[isec
++] = output_section
;
3955 else if (suggested_lma
== 0)
3956 suggested_lma
= output_section
->lma
;
3960 BFD_ASSERT (j
== section_count
);
3962 /* Step Two: Adjust the physical address of the current segment,
3964 if (isec
== section_count
)
3966 /* All of the sections fitted within the segment as currently
3967 specified. This is the default case. Add the segment to
3968 the list of built segments and carry on to process the next
3969 program header in the input BFD. */
3970 map
->count
= section_count
;
3971 *pointer_to_map
= map
;
3972 pointer_to_map
= &map
->next
;
3979 if (matching_lma
!= 0)
3981 /* At least one section fits inside the current segment.
3982 Keep it, but modify its physical address to match the
3983 LMA of the first section that fitted. */
3984 map
->p_paddr
= matching_lma
;
3988 /* None of the sections fitted inside the current segment.
3989 Change the current segment's physical address to match
3990 the LMA of the first section. */
3991 map
->p_paddr
= suggested_lma
;
3994 /* Offset the segment physical address from the lma
3995 to allow for space taken up by elf headers. */
3996 if (map
->includes_filehdr
)
3997 map
->p_paddr
-= iehdr
->e_ehsize
;
3999 if (map
->includes_phdrs
)
4001 map
->p_paddr
-= iehdr
->e_phnum
* iehdr
->e_phentsize
;
4003 /* iehdr->e_phnum is just an estimate of the number
4004 of program headers that we will need. Make a note
4005 here of the number we used and the segment we chose
4006 to hold these headers, so that we can adjust the
4007 offset when we know the correct value. */
4008 phdr_adjust_num
= iehdr
->e_phnum
;
4009 phdr_adjust_seg
= map
;
4013 /* Step Three: Loop over the sections again, this time assigning
4014 those that fit to the current segment and remvoing them from the
4015 sections array; but making sure not to leave large gaps. Once all
4016 possible sections have been assigned to the current segment it is
4017 added to the list of built segments and if sections still remain
4018 to be assigned, a new segment is constructed before repeating
4026 /* Fill the current segment with sections that fit. */
4027 for (j
= 0; j
< section_count
; j
++)
4029 section
= sections
[j
];
4031 if (section
== NULL
)
4034 output_section
= section
->output_section
;
4036 BFD_ASSERT (output_section
!= NULL
);
4038 if (IS_CONTAINED_BY_LMA (output_section
, segment
, map
->p_paddr
)
4039 || IS_COREFILE_NOTE (segment
, section
))
4041 if (map
->count
== 0)
4043 /* If the first section in a segment does not start at
4044 the beginning of the segment, then something is
4046 if (output_section
->lma
!=
4048 + (map
->includes_filehdr
? iehdr
->e_ehsize
: 0)
4049 + (map
->includes_phdrs
4050 ? iehdr
->e_phnum
* iehdr
->e_phentsize
4056 asection
* prev_sec
;
4058 prev_sec
= map
->sections
[map
->count
- 1];
4060 /* If the gap between the end of the previous section
4061 and the start of this section is more than
4062 maxpagesize then we need to start a new segment. */
4063 if ((BFD_ALIGN (prev_sec
->lma
+ prev_sec
->_raw_size
, maxpagesize
)
4064 < BFD_ALIGN (output_section
->lma
, maxpagesize
))
4065 || ((prev_sec
->lma
+ prev_sec
->_raw_size
) > output_section
->lma
))
4067 if (suggested_lma
== 0)
4068 suggested_lma
= output_section
->lma
;
4074 map
->sections
[map
->count
++] = output_section
;
4077 section
->segment_mark
= true;
4079 else if (suggested_lma
== 0)
4080 suggested_lma
= output_section
->lma
;
4083 BFD_ASSERT (map
->count
> 0);
4085 /* Add the current segment to the list of built segments. */
4086 *pointer_to_map
= map
;
4087 pointer_to_map
= &map
->next
;
4089 if (isec
< section_count
)
4091 /* We still have not allocated all of the sections to
4092 segments. Create a new segment here, initialise it
4093 and carry on looping. */
4094 map
= ((struct elf_segment_map
*)
4096 (sizeof (struct elf_segment_map
)
4097 + ((size_t) section_count
- 1)
4098 * sizeof (asection
*))));
4102 /* Initialise the fields of the segment map. Set the physical
4103 physical address to the LMA of the first section that has
4104 not yet been assigned. */
4106 map
->p_type
= segment
->p_type
;
4107 map
->p_flags
= segment
->p_flags
;
4108 map
->p_flags_valid
= 1;
4109 map
->p_paddr
= suggested_lma
;
4110 map
->p_paddr_valid
= 1;
4111 map
->includes_filehdr
= 0;
4112 map
->includes_phdrs
= 0;
4115 while (isec
< section_count
);
4120 /* The Solaris linker creates program headers in which all the
4121 p_paddr fields are zero. When we try to objcopy or strip such a
4122 file, we get confused. Check for this case, and if we find it
4123 reset the p_paddr_valid fields. */
4124 for (map
= map_first
; map
!= NULL
; map
= map
->next
)
4125 if (map
->p_paddr
!= 0)
4129 for (map
= map_first
; map
!= NULL
; map
= map
->next
)
4130 map
->p_paddr_valid
= 0;
4133 elf_tdata (obfd
)->segment_map
= map_first
;
4135 /* If we had to estimate the number of program headers that were
4136 going to be needed, then check our estimate know and adjust
4137 the offset if necessary. */
4138 if (phdr_adjust_seg
!= NULL
)
4142 for (count
= 0, map
= map_first
; map
!= NULL
; map
= map
->next
)
4145 if (count
> phdr_adjust_num
)
4146 phdr_adjust_seg
->p_paddr
4147 -= (count
- phdr_adjust_num
) * iehdr
->e_phentsize
;
4151 /* Final Step: Sort the segments into ascending order of physical
4153 if (map_first
!= NULL
)
4155 struct elf_segment_map
*prev
;
4158 for (map
= map_first
->next
; map
!= NULL
; prev
= map
, map
= map
->next
)
4160 /* Yes I know - its a bubble sort.... */
4161 if (map
->next
!= NULL
&& (map
->next
->p_paddr
< map
->p_paddr
))
4163 /* Swap map and map->next. */
4164 prev
->next
= map
->next
;
4165 map
->next
= map
->next
->next
;
4166 prev
->next
->next
= map
;
4176 #undef IS_CONTAINED_BY_VMA
4177 #undef IS_CONTAINED_BY_LMA
4178 #undef IS_COREFILE_NOTE
4179 #undef IS_SOLARIS_PT_INTERP
4180 #undef INCLUDE_SECTION_IN_SEGMENT
4181 #undef SEGMENT_AFTER_SEGMENT
4182 #undef SEGMENT_OVERLAPS
4186 /* Copy private section information. This copies over the entsize
4187 field, and sometimes the info field. */
4190 _bfd_elf_copy_private_section_data (ibfd
, isec
, obfd
, osec
)
4196 Elf_Internal_Shdr
*ihdr
, *ohdr
;
4198 if (ibfd
->xvec
->flavour
!= bfd_target_elf_flavour
4199 || obfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
4202 /* Copy over private BFD data if it has not already been copied.
4203 This must be done here, rather than in the copy_private_bfd_data
4204 entry point, because the latter is called after the section
4205 contents have been set, which means that the program headers have
4206 already been worked out. */
4207 if (elf_tdata (obfd
)->segment_map
== NULL
4208 && elf_tdata (ibfd
)->phdr
!= NULL
)
4212 /* Only set up the segments if there are no more SEC_ALLOC
4213 sections. FIXME: This won't do the right thing if objcopy is
4214 used to remove the last SEC_ALLOC section, since objcopy
4215 won't call this routine in that case. */
4216 for (s
= isec
->next
; s
!= NULL
; s
= s
->next
)
4217 if ((s
->flags
& SEC_ALLOC
) != 0)
4221 if (! copy_private_bfd_data (ibfd
, obfd
))
4226 ihdr
= &elf_section_data (isec
)->this_hdr
;
4227 ohdr
= &elf_section_data (osec
)->this_hdr
;
4229 ohdr
->sh_entsize
= ihdr
->sh_entsize
;
4231 if (ihdr
->sh_type
== SHT_SYMTAB
4232 || ihdr
->sh_type
== SHT_DYNSYM
4233 || ihdr
->sh_type
== SHT_GNU_verneed
4234 || ihdr
->sh_type
== SHT_GNU_verdef
)
4235 ohdr
->sh_info
= ihdr
->sh_info
;
4237 elf_section_data (osec
)->use_rela_p
4238 = elf_section_data (isec
)->use_rela_p
;
4243 /* Copy private symbol information. If this symbol is in a section
4244 which we did not map into a BFD section, try to map the section
4245 index correctly. We use special macro definitions for the mapped
4246 section indices; these definitions are interpreted by the
4247 swap_out_syms function. */
4249 #define MAP_ONESYMTAB (SHN_LORESERVE - 1)
4250 #define MAP_DYNSYMTAB (SHN_LORESERVE - 2)
4251 #define MAP_STRTAB (SHN_LORESERVE - 3)
4252 #define MAP_SHSTRTAB (SHN_LORESERVE - 4)
4255 _bfd_elf_copy_private_symbol_data (ibfd
, isymarg
, obfd
, osymarg
)
4261 elf_symbol_type
*isym
, *osym
;
4263 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
4264 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
4267 isym
= elf_symbol_from (ibfd
, isymarg
);
4268 osym
= elf_symbol_from (obfd
, osymarg
);
4272 && bfd_is_abs_section (isym
->symbol
.section
))
4276 shndx
= isym
->internal_elf_sym
.st_shndx
;
4277 if (shndx
== elf_onesymtab (ibfd
))
4278 shndx
= MAP_ONESYMTAB
;
4279 else if (shndx
== elf_dynsymtab (ibfd
))
4280 shndx
= MAP_DYNSYMTAB
;
4281 else if (shndx
== elf_tdata (ibfd
)->strtab_section
)
4283 else if (shndx
== elf_tdata (ibfd
)->shstrtab_section
)
4284 shndx
= MAP_SHSTRTAB
;
4285 osym
->internal_elf_sym
.st_shndx
= shndx
;
4291 /* Swap out the symbols. */
4294 swap_out_syms (abfd
, sttp
, relocatable_p
)
4296 struct bfd_strtab_hash
**sttp
;
4299 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4301 if (!elf_map_symbols (abfd
))
4304 /* Dump out the symtabs. */
4306 int symcount
= bfd_get_symcount (abfd
);
4307 asymbol
**syms
= bfd_get_outsymbols (abfd
);
4308 struct bfd_strtab_hash
*stt
;
4309 Elf_Internal_Shdr
*symtab_hdr
;
4310 Elf_Internal_Shdr
*symstrtab_hdr
;
4311 char *outbound_syms
;
4314 stt
= _bfd_elf_stringtab_init ();
4318 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
4319 symtab_hdr
->sh_type
= SHT_SYMTAB
;
4320 symtab_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
4321 symtab_hdr
->sh_size
= symtab_hdr
->sh_entsize
* (symcount
+ 1);
4322 symtab_hdr
->sh_info
= elf_num_locals (abfd
) + 1;
4323 symtab_hdr
->sh_addralign
= bed
->s
->file_align
;
4325 symstrtab_hdr
= &elf_tdata (abfd
)->strtab_hdr
;
4326 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
4328 outbound_syms
= bfd_alloc (abfd
,
4329 (1 + symcount
) * bed
->s
->sizeof_sym
);
4330 if (outbound_syms
== NULL
)
4332 symtab_hdr
->contents
= (PTR
) outbound_syms
;
4334 /* now generate the data (for "contents") */
4336 /* Fill in zeroth symbol and swap it out. */
4337 Elf_Internal_Sym sym
;
4343 sym
.st_shndx
= SHN_UNDEF
;
4344 bed
->s
->swap_symbol_out (abfd
, &sym
, (PTR
) outbound_syms
);
4345 outbound_syms
+= bed
->s
->sizeof_sym
;
4347 for (idx
= 0; idx
< symcount
; idx
++)
4349 Elf_Internal_Sym sym
;
4350 bfd_vma value
= syms
[idx
]->value
;
4351 elf_symbol_type
*type_ptr
;
4352 flagword flags
= syms
[idx
]->flags
;
4355 if (flags
& BSF_SECTION_SYM
)
4356 /* Section symbols have no names. */
4360 sym
.st_name
= (unsigned long) _bfd_stringtab_add (stt
,
4363 if (sym
.st_name
== (unsigned long) -1)
4367 type_ptr
= elf_symbol_from (abfd
, syms
[idx
]);
4369 if ((flags
& BSF_SECTION_SYM
) == 0
4370 && bfd_is_com_section (syms
[idx
]->section
))
4372 /* ELF common symbols put the alignment into the `value' field,
4373 and the size into the `size' field. This is backwards from
4374 how BFD handles it, so reverse it here. */
4375 sym
.st_size
= value
;
4376 if (type_ptr
== NULL
4377 || type_ptr
->internal_elf_sym
.st_value
== 0)
4378 sym
.st_value
= value
>= 16 ? 16 : (1 << bfd_log2 (value
));
4380 sym
.st_value
= type_ptr
->internal_elf_sym
.st_value
;
4381 sym
.st_shndx
= _bfd_elf_section_from_bfd_section
4382 (abfd
, syms
[idx
]->section
);
4386 asection
*sec
= syms
[idx
]->section
;
4389 if (sec
->output_section
)
4391 value
+= sec
->output_offset
;
4392 sec
= sec
->output_section
;
4394 /* Don't add in the section vma for relocatable output. */
4395 if (! relocatable_p
)
4397 sym
.st_value
= value
;
4398 sym
.st_size
= type_ptr
? type_ptr
->internal_elf_sym
.st_size
: 0;
4400 if (bfd_is_abs_section (sec
)
4402 && type_ptr
->internal_elf_sym
.st_shndx
!= 0)
4404 /* This symbol is in a real ELF section which we did
4405 not create as a BFD section. Undo the mapping done
4406 by copy_private_symbol_data. */
4407 shndx
= type_ptr
->internal_elf_sym
.st_shndx
;
4411 shndx
= elf_onesymtab (abfd
);
4414 shndx
= elf_dynsymtab (abfd
);
4417 shndx
= elf_tdata (abfd
)->strtab_section
;
4420 shndx
= elf_tdata (abfd
)->shstrtab_section
;
4428 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec
);
4434 /* Writing this would be a hell of a lot easier if
4435 we had some decent documentation on bfd, and
4436 knew what to expect of the library, and what to
4437 demand of applications. For example, it
4438 appears that `objcopy' might not set the
4439 section of a symbol to be a section that is
4440 actually in the output file. */
4441 sec2
= bfd_get_section_by_name (abfd
, sec
->name
);
4442 BFD_ASSERT (sec2
!= 0);
4443 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec2
);
4444 BFD_ASSERT (shndx
!= -1);
4448 sym
.st_shndx
= shndx
;
4451 if ((flags
& BSF_FUNCTION
) != 0)
4453 else if ((flags
& BSF_OBJECT
) != 0)
4458 /* Processor-specific types */
4459 if (type_ptr
!= NULL
4460 && bed
->elf_backend_get_symbol_type
)
4461 type
= (*bed
->elf_backend_get_symbol_type
) (&type_ptr
->internal_elf_sym
, type
);
4463 if (flags
& BSF_SECTION_SYM
)
4464 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_SECTION
);
4465 else if (bfd_is_com_section (syms
[idx
]->section
))
4466 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, type
);
4467 else if (bfd_is_und_section (syms
[idx
]->section
))
4468 sym
.st_info
= ELF_ST_INFO (((flags
& BSF_WEAK
)
4472 else if (flags
& BSF_FILE
)
4473 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FILE
);
4476 int bind
= STB_LOCAL
;
4478 if (flags
& BSF_LOCAL
)
4480 else if (flags
& BSF_WEAK
)
4482 else if (flags
& BSF_GLOBAL
)
4485 sym
.st_info
= ELF_ST_INFO (bind
, type
);
4488 if (type_ptr
!= NULL
)
4489 sym
.st_other
= type_ptr
->internal_elf_sym
.st_other
;
4493 bed
->s
->swap_symbol_out (abfd
, &sym
, (PTR
) outbound_syms
);
4494 outbound_syms
+= bed
->s
->sizeof_sym
;
4498 symstrtab_hdr
->sh_size
= _bfd_stringtab_size (stt
);
4499 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
4501 symstrtab_hdr
->sh_flags
= 0;
4502 symstrtab_hdr
->sh_addr
= 0;
4503 symstrtab_hdr
->sh_entsize
= 0;
4504 symstrtab_hdr
->sh_link
= 0;
4505 symstrtab_hdr
->sh_info
= 0;
4506 symstrtab_hdr
->sh_addralign
= 1;
4512 /* Return the number of bytes required to hold the symtab vector.
4514 Note that we base it on the count plus 1, since we will null terminate
4515 the vector allocated based on this size. However, the ELF symbol table
4516 always has a dummy entry as symbol #0, so it ends up even. */
4519 _bfd_elf_get_symtab_upper_bound (abfd
)
4524 Elf_Internal_Shdr
*hdr
= &elf_tdata (abfd
)->symtab_hdr
;
4526 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
4527 symtab_size
= (symcount
- 1 + 1) * (sizeof (asymbol
*));
4533 _bfd_elf_get_dynamic_symtab_upper_bound (abfd
)
4538 Elf_Internal_Shdr
*hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
4540 if (elf_dynsymtab (abfd
) == 0)
4542 bfd_set_error (bfd_error_invalid_operation
);
4546 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
4547 symtab_size
= (symcount
- 1 + 1) * (sizeof (asymbol
*));
4553 _bfd_elf_get_reloc_upper_bound (abfd
, asect
)
4554 bfd
*abfd ATTRIBUTE_UNUSED
;
4557 return (asect
->reloc_count
+ 1) * sizeof (arelent
*);
4560 /* Canonicalize the relocs. */
4563 _bfd_elf_canonicalize_reloc (abfd
, section
, relptr
, symbols
)
4572 if (! get_elf_backend_data (abfd
)->s
->slurp_reloc_table (abfd
,
4578 tblptr
= section
->relocation
;
4579 for (i
= 0; i
< section
->reloc_count
; i
++)
4580 *relptr
++ = tblptr
++;
4584 return section
->reloc_count
;
4588 _bfd_elf_get_symtab (abfd
, alocation
)
4590 asymbol
**alocation
;
4592 long symcount
= get_elf_backend_data (abfd
)->s
->slurp_symbol_table
4593 (abfd
, alocation
, false);
4596 bfd_get_symcount (abfd
) = symcount
;
4601 _bfd_elf_canonicalize_dynamic_symtab (abfd
, alocation
)
4603 asymbol
**alocation
;
4605 return get_elf_backend_data (abfd
)->s
->slurp_symbol_table
4606 (abfd
, alocation
, true);
4609 /* Return the size required for the dynamic reloc entries. Any
4610 section that was actually installed in the BFD, and has type
4611 SHT_REL or SHT_RELA, and uses the dynamic symbol table, is
4612 considered to be a dynamic reloc section. */
4615 _bfd_elf_get_dynamic_reloc_upper_bound (abfd
)
4621 if (elf_dynsymtab (abfd
) == 0)
4623 bfd_set_error (bfd_error_invalid_operation
);
4627 ret
= sizeof (arelent
*);
4628 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
4629 if (elf_section_data (s
)->this_hdr
.sh_link
== elf_dynsymtab (abfd
)
4630 && (elf_section_data (s
)->this_hdr
.sh_type
== SHT_REL
4631 || elf_section_data (s
)->this_hdr
.sh_type
== SHT_RELA
))
4632 ret
+= ((s
->_raw_size
/ elf_section_data (s
)->this_hdr
.sh_entsize
)
4633 * sizeof (arelent
*));
4638 /* Canonicalize the dynamic relocation entries. Note that we return
4639 the dynamic relocations as a single block, although they are
4640 actually associated with particular sections; the interface, which
4641 was designed for SunOS style shared libraries, expects that there
4642 is only one set of dynamic relocs. Any section that was actually
4643 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses
4644 the dynamic symbol table, is considered to be a dynamic reloc
4648 _bfd_elf_canonicalize_dynamic_reloc (abfd
, storage
, syms
)
4653 boolean (*slurp_relocs
) PARAMS ((bfd
*, asection
*, asymbol
**, boolean
));
4657 if (elf_dynsymtab (abfd
) == 0)
4659 bfd_set_error (bfd_error_invalid_operation
);
4663 slurp_relocs
= get_elf_backend_data (abfd
)->s
->slurp_reloc_table
;
4665 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
4667 if (elf_section_data (s
)->this_hdr
.sh_link
== elf_dynsymtab (abfd
)
4668 && (elf_section_data (s
)->this_hdr
.sh_type
== SHT_REL
4669 || elf_section_data (s
)->this_hdr
.sh_type
== SHT_RELA
))
4674 if (! (*slurp_relocs
) (abfd
, s
, syms
, true))
4676 count
= s
->_raw_size
/ elf_section_data (s
)->this_hdr
.sh_entsize
;
4678 for (i
= 0; i
< count
; i
++)
4689 /* Read in the version information. */
4692 _bfd_elf_slurp_version_tables (abfd
)
4695 bfd_byte
*contents
= NULL
;
4697 if (elf_dynverdef (abfd
) != 0)
4699 Elf_Internal_Shdr
*hdr
;
4700 Elf_External_Verdef
*everdef
;
4701 Elf_Internal_Verdef
*iverdef
;
4702 Elf_Internal_Verdef
*iverdefarr
;
4703 Elf_Internal_Verdef iverdefmem
;
4705 unsigned int maxidx
;
4707 hdr
= &elf_tdata (abfd
)->dynverdef_hdr
;
4709 contents
= (bfd_byte
*) bfd_malloc (hdr
->sh_size
);
4710 if (contents
== NULL
)
4712 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
4713 || bfd_read ((PTR
) contents
, 1, hdr
->sh_size
, abfd
) != hdr
->sh_size
)
4716 /* We know the number of entries in the section but not the maximum
4717 index. Therefore we have to run through all entries and find
4719 everdef
= (Elf_External_Verdef
*) contents
;
4721 for (i
= 0; i
< hdr
->sh_info
; ++i
)
4723 _bfd_elf_swap_verdef_in (abfd
, everdef
, &iverdefmem
);
4725 if ((iverdefmem
.vd_ndx
& VERSYM_VERSION
) > maxidx
)
4726 maxidx
= iverdefmem
.vd_ndx
& VERSYM_VERSION
;
4728 everdef
= ((Elf_External_Verdef
*)
4729 ((bfd_byte
*) everdef
+ iverdefmem
.vd_next
));
4732 elf_tdata (abfd
)->verdef
=
4733 ((Elf_Internal_Verdef
*)
4734 bfd_zalloc (abfd
, maxidx
* sizeof (Elf_Internal_Verdef
)));
4735 if (elf_tdata (abfd
)->verdef
== NULL
)
4738 elf_tdata (abfd
)->cverdefs
= maxidx
;
4740 everdef
= (Elf_External_Verdef
*) contents
;
4741 iverdefarr
= elf_tdata (abfd
)->verdef
;
4742 for (i
= 0; i
< hdr
->sh_info
; i
++)
4744 Elf_External_Verdaux
*everdaux
;
4745 Elf_Internal_Verdaux
*iverdaux
;
4748 _bfd_elf_swap_verdef_in (abfd
, everdef
, &iverdefmem
);
4750 iverdef
= &iverdefarr
[(iverdefmem
.vd_ndx
& VERSYM_VERSION
) - 1];
4751 memcpy (iverdef
, &iverdefmem
, sizeof (Elf_Internal_Verdef
));
4753 iverdef
->vd_bfd
= abfd
;
4755 iverdef
->vd_auxptr
= ((Elf_Internal_Verdaux
*)
4758 * sizeof (Elf_Internal_Verdaux
))));
4759 if (iverdef
->vd_auxptr
== NULL
)
4762 everdaux
= ((Elf_External_Verdaux
*)
4763 ((bfd_byte
*) everdef
+ iverdef
->vd_aux
));
4764 iverdaux
= iverdef
->vd_auxptr
;
4765 for (j
= 0; j
< iverdef
->vd_cnt
; j
++, iverdaux
++)
4767 _bfd_elf_swap_verdaux_in (abfd
, everdaux
, iverdaux
);
4769 iverdaux
->vda_nodename
=
4770 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
4771 iverdaux
->vda_name
);
4772 if (iverdaux
->vda_nodename
== NULL
)
4775 if (j
+ 1 < iverdef
->vd_cnt
)
4776 iverdaux
->vda_nextptr
= iverdaux
+ 1;
4778 iverdaux
->vda_nextptr
= NULL
;
4780 everdaux
= ((Elf_External_Verdaux
*)
4781 ((bfd_byte
*) everdaux
+ iverdaux
->vda_next
));
4784 iverdef
->vd_nodename
= iverdef
->vd_auxptr
->vda_nodename
;
4786 if (i
+ 1 < hdr
->sh_info
)
4787 iverdef
->vd_nextdef
= iverdef
+ 1;
4789 iverdef
->vd_nextdef
= NULL
;
4791 everdef
= ((Elf_External_Verdef
*)
4792 ((bfd_byte
*) everdef
+ iverdef
->vd_next
));
4799 if (elf_dynverref (abfd
) != 0)
4801 Elf_Internal_Shdr
*hdr
;
4802 Elf_External_Verneed
*everneed
;
4803 Elf_Internal_Verneed
*iverneed
;
4806 hdr
= &elf_tdata (abfd
)->dynverref_hdr
;
4808 elf_tdata (abfd
)->verref
=
4809 ((Elf_Internal_Verneed
*)
4810 bfd_zalloc (abfd
, hdr
->sh_info
* sizeof (Elf_Internal_Verneed
)));
4811 if (elf_tdata (abfd
)->verref
== NULL
)
4814 elf_tdata (abfd
)->cverrefs
= hdr
->sh_info
;
4816 contents
= (bfd_byte
*) bfd_malloc (hdr
->sh_size
);
4817 if (contents
== NULL
)
4819 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
4820 || bfd_read ((PTR
) contents
, 1, hdr
->sh_size
, abfd
) != hdr
->sh_size
)
4823 everneed
= (Elf_External_Verneed
*) contents
;
4824 iverneed
= elf_tdata (abfd
)->verref
;
4825 for (i
= 0; i
< hdr
->sh_info
; i
++, iverneed
++)
4827 Elf_External_Vernaux
*evernaux
;
4828 Elf_Internal_Vernaux
*ivernaux
;
4831 _bfd_elf_swap_verneed_in (abfd
, everneed
, iverneed
);
4833 iverneed
->vn_bfd
= abfd
;
4835 iverneed
->vn_filename
=
4836 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
4838 if (iverneed
->vn_filename
== NULL
)
4841 iverneed
->vn_auxptr
=
4842 ((Elf_Internal_Vernaux
*)
4844 iverneed
->vn_cnt
* sizeof (Elf_Internal_Vernaux
)));
4846 evernaux
= ((Elf_External_Vernaux
*)
4847 ((bfd_byte
*) everneed
+ iverneed
->vn_aux
));
4848 ivernaux
= iverneed
->vn_auxptr
;
4849 for (j
= 0; j
< iverneed
->vn_cnt
; j
++, ivernaux
++)
4851 _bfd_elf_swap_vernaux_in (abfd
, evernaux
, ivernaux
);
4853 ivernaux
->vna_nodename
=
4854 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
4855 ivernaux
->vna_name
);
4856 if (ivernaux
->vna_nodename
== NULL
)
4859 if (j
+ 1 < iverneed
->vn_cnt
)
4860 ivernaux
->vna_nextptr
= ivernaux
+ 1;
4862 ivernaux
->vna_nextptr
= NULL
;
4864 evernaux
= ((Elf_External_Vernaux
*)
4865 ((bfd_byte
*) evernaux
+ ivernaux
->vna_next
));
4868 if (i
+ 1 < hdr
->sh_info
)
4869 iverneed
->vn_nextref
= iverneed
+ 1;
4871 iverneed
->vn_nextref
= NULL
;
4873 everneed
= ((Elf_External_Verneed
*)
4874 ((bfd_byte
*) everneed
+ iverneed
->vn_next
));
4884 if (contents
== NULL
)
4890 _bfd_elf_make_empty_symbol (abfd
)
4893 elf_symbol_type
*newsym
;
4895 newsym
= (elf_symbol_type
*) bfd_zalloc (abfd
, sizeof (elf_symbol_type
));
4900 newsym
->symbol
.the_bfd
= abfd
;
4901 return &newsym
->symbol
;
4906 _bfd_elf_get_symbol_info (ignore_abfd
, symbol
, ret
)
4907 bfd
*ignore_abfd ATTRIBUTE_UNUSED
;
4911 bfd_symbol_info (symbol
, ret
);
4914 /* Return whether a symbol name implies a local symbol. Most targets
4915 use this function for the is_local_label_name entry point, but some
4919 _bfd_elf_is_local_label_name (abfd
, name
)
4920 bfd
*abfd ATTRIBUTE_UNUSED
;
4923 /* Normal local symbols start with ``.L''. */
4924 if (name
[0] == '.' && name
[1] == 'L')
4927 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
4928 DWARF debugging symbols starting with ``..''. */
4929 if (name
[0] == '.' && name
[1] == '.')
4932 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
4933 emitting DWARF debugging output. I suspect this is actually a
4934 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
4935 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
4936 underscore to be emitted on some ELF targets). For ease of use,
4937 we treat such symbols as local. */
4938 if (name
[0] == '_' && name
[1] == '.' && name
[2] == 'L' && name
[3] == '_')
4945 _bfd_elf_get_lineno (ignore_abfd
, symbol
)
4946 bfd
*ignore_abfd ATTRIBUTE_UNUSED
;
4947 asymbol
*symbol ATTRIBUTE_UNUSED
;
4954 _bfd_elf_set_arch_mach (abfd
, arch
, machine
)
4956 enum bfd_architecture arch
;
4957 unsigned long machine
;
4959 /* If this isn't the right architecture for this backend, and this
4960 isn't the generic backend, fail. */
4961 if (arch
!= get_elf_backend_data (abfd
)->arch
4962 && arch
!= bfd_arch_unknown
4963 && get_elf_backend_data (abfd
)->arch
!= bfd_arch_unknown
)
4966 return bfd_default_set_arch_mach (abfd
, arch
, machine
);
4969 /* Find the nearest line to a particular section and offset, for error
4973 _bfd_elf_find_nearest_line (abfd
,
4984 CONST
char **filename_ptr
;
4985 CONST
char **functionname_ptr
;
4986 unsigned int *line_ptr
;
4989 const char *filename
;
4994 if (_bfd_dwarf1_find_nearest_line (abfd
, section
, symbols
, offset
,
4995 filename_ptr
, functionname_ptr
,
4999 if (_bfd_dwarf2_find_nearest_line (abfd
, section
, symbols
, offset
,
5000 filename_ptr
, functionname_ptr
,
5004 if (! _bfd_stab_section_find_nearest_line (abfd
, symbols
, section
, offset
,
5005 &found
, filename_ptr
,
5006 functionname_ptr
, line_ptr
,
5007 &elf_tdata (abfd
)->line_info
))
5012 if (symbols
== NULL
)
5019 for (p
= symbols
; *p
!= NULL
; p
++)
5023 q
= (elf_symbol_type
*) *p
;
5025 if (bfd_get_section (&q
->symbol
) != section
)
5028 switch (ELF_ST_TYPE (q
->internal_elf_sym
.st_info
))
5033 filename
= bfd_asymbol_name (&q
->symbol
);
5037 if (q
->symbol
.section
== section
5038 && q
->symbol
.value
>= low_func
5039 && q
->symbol
.value
<= offset
)
5041 func
= (asymbol
*) q
;
5042 low_func
= q
->symbol
.value
;
5051 *filename_ptr
= filename
;
5052 *functionname_ptr
= bfd_asymbol_name (func
);
5058 _bfd_elf_sizeof_headers (abfd
, reloc
)
5064 ret
= get_elf_backend_data (abfd
)->s
->sizeof_ehdr
;
5066 ret
+= get_program_header_size (abfd
);
5071 _bfd_elf_set_section_contents (abfd
, section
, location
, offset
, count
)
5076 bfd_size_type count
;
5078 Elf_Internal_Shdr
*hdr
;
5080 if (! abfd
->output_has_begun
5081 && ! _bfd_elf_compute_section_file_positions
5082 (abfd
, (struct bfd_link_info
*) NULL
))
5085 hdr
= &elf_section_data (section
)->this_hdr
;
5087 if (bfd_seek (abfd
, hdr
->sh_offset
+ offset
, SEEK_SET
) == -1)
5089 if (bfd_write (location
, 1, count
, abfd
) != count
)
5096 _bfd_elf_no_info_to_howto (abfd
, cache_ptr
, dst
)
5097 bfd
*abfd ATTRIBUTE_UNUSED
;
5098 arelent
*cache_ptr ATTRIBUTE_UNUSED
;
5099 Elf_Internal_Rela
*dst ATTRIBUTE_UNUSED
;
5106 _bfd_elf_no_info_to_howto_rel (abfd
, cache_ptr
, dst
)
5109 Elf_Internal_Rel
*dst
;
5115 /* Try to convert a non-ELF reloc into an ELF one. */
5118 _bfd_elf_validate_reloc (abfd
, areloc
)
5122 /* Check whether we really have an ELF howto. */
5124 if ((*areloc
->sym_ptr_ptr
)->the_bfd
->xvec
!= abfd
->xvec
)
5126 bfd_reloc_code_real_type code
;
5127 reloc_howto_type
*howto
;
5129 /* Alien reloc: Try to determine its type to replace it with an
5130 equivalent ELF reloc. */
5132 if (areloc
->howto
->pc_relative
)
5134 switch (areloc
->howto
->bitsize
)
5137 code
= BFD_RELOC_8_PCREL
;
5140 code
= BFD_RELOC_12_PCREL
;
5143 code
= BFD_RELOC_16_PCREL
;
5146 code
= BFD_RELOC_24_PCREL
;
5149 code
= BFD_RELOC_32_PCREL
;
5152 code
= BFD_RELOC_64_PCREL
;
5158 howto
= bfd_reloc_type_lookup (abfd
, code
);
5160 if (areloc
->howto
->pcrel_offset
!= howto
->pcrel_offset
)
5162 if (howto
->pcrel_offset
)
5163 areloc
->addend
+= areloc
->address
;
5165 areloc
->addend
-= areloc
->address
; /* addend is unsigned!! */
5170 switch (areloc
->howto
->bitsize
)
5176 code
= BFD_RELOC_14
;
5179 code
= BFD_RELOC_16
;
5182 code
= BFD_RELOC_26
;
5185 code
= BFD_RELOC_32
;
5188 code
= BFD_RELOC_64
;
5194 howto
= bfd_reloc_type_lookup (abfd
, code
);
5198 areloc
->howto
= howto
;
5206 (*_bfd_error_handler
)
5207 (_("%s: unsupported relocation type %s"),
5208 bfd_get_filename (abfd
), areloc
->howto
->name
);
5209 bfd_set_error (bfd_error_bad_value
);
5214 _bfd_elf_close_and_cleanup (abfd
)
5217 if (bfd_get_format (abfd
) == bfd_object
)
5219 if (elf_shstrtab (abfd
) != NULL
)
5220 _bfd_stringtab_free (elf_shstrtab (abfd
));
5223 return _bfd_generic_close_and_cleanup (abfd
);
5226 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
5227 in the relocation's offset. Thus we cannot allow any sort of sanity
5228 range-checking to interfere. There is nothing else to do in processing
5231 bfd_reloc_status_type
5232 _bfd_elf_rel_vtable_reloc_fn (abfd
, re
, symbol
, data
, is
, obfd
, errmsg
)
5233 bfd
*abfd ATTRIBUTE_UNUSED
;
5234 arelent
*re ATTRIBUTE_UNUSED
;
5235 struct symbol_cache_entry
*symbol ATTRIBUTE_UNUSED
;
5236 PTR data ATTRIBUTE_UNUSED
;
5237 asection
*is ATTRIBUTE_UNUSED
;
5238 bfd
*obfd ATTRIBUTE_UNUSED
;
5239 char **errmsg ATTRIBUTE_UNUSED
;
5241 return bfd_reloc_ok
;
5244 /* Elf core file support. Much of this only works on native
5245 toolchains, since we rely on knowing the
5246 machine-dependent procfs structure in order to pick
5247 out details about the corefile. */
5249 #ifdef HAVE_SYS_PROCFS_H
5250 # include <sys/procfs.h>
5253 /* Define offsetof for those systems which lack it. */
5256 # define offsetof(TYPE, MEMBER) ((unsigned long) &((TYPE *)0)->MEMBER)
5259 /* FIXME: this is kinda wrong, but it's what gdb wants. */
5262 elfcore_make_pid (abfd
)
5265 return ((elf_tdata (abfd
)->core_lwpid
<< 16)
5266 + (elf_tdata (abfd
)->core_pid
));
5269 /* If there isn't a section called NAME, make one, using
5270 data from SECT. Note, this function will generate a
5271 reference to NAME, so you shouldn't deallocate or
5275 elfcore_maybe_make_sect (abfd
, name
, sect
)
5282 if (bfd_get_section_by_name (abfd
, name
) != NULL
)
5285 sect2
= bfd_make_section (abfd
, name
);
5289 sect2
->_raw_size
= sect
->_raw_size
;
5290 sect2
->filepos
= sect
->filepos
;
5291 sect2
->flags
= sect
->flags
;
5292 sect2
->alignment_power
= sect
->alignment_power
;
5296 /* prstatus_t exists on:
5298 linux 2.[01] + glibc
5302 #if defined (HAVE_PRSTATUS_T)
5304 elfcore_grok_prstatus (abfd
, note
)
5306 Elf_Internal_Note
*note
;
5314 if (note
->descsz
== sizeof (prstatus_t
))
5318 raw_size
= sizeof (prstat
.pr_reg
);
5319 offset
= offsetof (prstatus_t
, pr_reg
);
5320 memcpy (&prstat
, note
->descdata
, sizeof (prstat
));
5322 elf_tdata (abfd
)->core_signal
= prstat
.pr_cursig
;
5323 elf_tdata (abfd
)->core_pid
= prstat
.pr_pid
;
5325 /* pr_who exists on:
5328 pr_who doesn't exist on:
5331 #if defined (HAVE_PRSTATUS_T_PR_WHO)
5332 elf_tdata (abfd
)->core_lwpid
= prstat
.pr_who
;
5335 #if defined (HAVE_PRSTATUS32_T)
5336 else if (note
->descsz
== sizeof (prstatus32_t
))
5338 /* 64-bit host, 32-bit corefile */
5339 prstatus32_t prstat
;
5341 raw_size
= sizeof (prstat
.pr_reg
);
5342 offset
= offsetof (prstatus32_t
, pr_reg
);
5343 memcpy (&prstat
, note
->descdata
, sizeof (prstat
));
5345 elf_tdata (abfd
)->core_signal
= prstat
.pr_cursig
;
5346 elf_tdata (abfd
)->core_pid
= prstat
.pr_pid
;
5348 /* pr_who exists on:
5351 pr_who doesn't exist on:
5354 #if defined (HAVE_PRSTATUS32_T_PR_WHO)
5355 elf_tdata (abfd
)->core_lwpid
= prstat
.pr_who
;
5358 #endif /* HAVE_PRSTATUS32_T */
5361 /* Fail - we don't know how to handle any other
5362 note size (ie. data object type). */
5366 /* Make a ".reg/999" section. */
5368 sprintf (buf
, ".reg/%d", elfcore_make_pid (abfd
));
5369 name
= bfd_alloc (abfd
, strlen (buf
) + 1);
5374 sect
= bfd_make_section (abfd
, name
);
5378 sect
->_raw_size
= raw_size
;
5379 sect
->filepos
= note
->descpos
+ offset
;
5381 sect
->flags
= SEC_HAS_CONTENTS
;
5382 sect
->alignment_power
= 2;
5384 if (! elfcore_maybe_make_sect (abfd
, ".reg", sect
))
5389 #endif /* defined (HAVE_PRSTATUS_T) */
5391 /* Create a pseudosection containing the exact contents of NOTE. This
5392 actually creates up to two pseudosections:
5393 - For the single-threaded case, a section named NAME, unless
5394 such a section already exists.
5395 - For the multi-threaded case, a section named "NAME/PID", where
5396 PID is elfcore_make_pid (abfd).
5397 Both pseudosections have identical contents: the contents of NOTE. */
5400 elfcore_make_note_pseudosection (abfd
, name
, note
)
5403 Elf_Internal_Note
*note
;
5406 char *threaded_name
;
5409 /* Build the section name. */
5411 sprintf (buf
, "%s/%d", name
, elfcore_make_pid (abfd
));
5412 threaded_name
= bfd_alloc (abfd
, strlen (buf
) + 1);
5413 if (threaded_name
== NULL
)
5415 strcpy (threaded_name
, buf
);
5417 sect
= bfd_make_section (abfd
, threaded_name
);
5420 sect
->_raw_size
= note
->descsz
;
5421 sect
->filepos
= note
->descpos
;
5422 sect
->flags
= SEC_HAS_CONTENTS
;
5423 sect
->alignment_power
= 2;
5425 if (! elfcore_maybe_make_sect (abfd
, name
, sect
))
5431 /* There isn't a consistent prfpregset_t across platforms,
5432 but it doesn't matter, because we don't have to pick this
5433 data structure apart. */
5436 elfcore_grok_prfpreg (abfd
, note
)
5438 Elf_Internal_Note
*note
;
5440 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
5443 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
5444 type of 5 (NT_PRXFPREG). Just include the whole note's contents
5448 elfcore_grok_prxfpreg (abfd
, note
)
5450 Elf_Internal_Note
*note
;
5452 return elfcore_make_note_pseudosection (abfd
, ".reg-xfp", note
);
5455 #if defined (HAVE_PRPSINFO_T)
5456 typedef prpsinfo_t elfcore_psinfo_t
;
5457 #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
5458 typedef prpsinfo32_t elfcore_psinfo32_t
;
5462 #if defined (HAVE_PSINFO_T)
5463 typedef psinfo_t elfcore_psinfo_t
;
5464 #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
5465 typedef psinfo32_t elfcore_psinfo32_t
;
5469 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
5471 /* return a malloc'ed copy of a string at START which is at
5472 most MAX bytes long, possibly without a terminating '\0'.
5473 the copy will always have a terminating '\0'. */
5476 elfcore_strndup (abfd
, start
, max
)
5482 char *end
= memchr (start
, '\0', max
);
5490 dup
= bfd_alloc (abfd
, len
+ 1);
5494 memcpy (dup
, start
, len
);
5501 elfcore_grok_psinfo (abfd
, note
)
5503 Elf_Internal_Note
*note
;
5505 if (note
->descsz
== sizeof (elfcore_psinfo_t
))
5507 elfcore_psinfo_t psinfo
;
5509 memcpy (&psinfo
, note
->descdata
, sizeof (psinfo
));
5511 elf_tdata (abfd
)->core_program
5512 = elfcore_strndup (abfd
, psinfo
.pr_fname
, sizeof (psinfo
.pr_fname
));
5514 elf_tdata (abfd
)->core_command
5515 = elfcore_strndup (abfd
, psinfo
.pr_psargs
, sizeof (psinfo
.pr_psargs
));
5517 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
5518 else if (note
->descsz
== sizeof (elfcore_psinfo32_t
))
5520 /* 64-bit host, 32-bit corefile */
5521 elfcore_psinfo32_t psinfo
;
5523 memcpy (&psinfo
, note
->descdata
, sizeof (psinfo
));
5525 elf_tdata (abfd
)->core_program
5526 = elfcore_strndup (abfd
, psinfo
.pr_fname
, sizeof (psinfo
.pr_fname
));
5528 elf_tdata (abfd
)->core_command
5529 = elfcore_strndup (abfd
, psinfo
.pr_psargs
, sizeof (psinfo
.pr_psargs
));
5535 /* Fail - we don't know how to handle any other
5536 note size (ie. data object type). */
5540 /* Note that for some reason, a spurious space is tacked
5541 onto the end of the args in some (at least one anyway)
5542 implementations, so strip it off if it exists. */
5545 char *command
= elf_tdata (abfd
)->core_command
;
5546 int n
= strlen (command
);
5548 if (0 < n
&& command
[n
- 1] == ' ')
5549 command
[n
- 1] = '\0';
5554 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
5556 #if defined (HAVE_PSTATUS_T)
5558 elfcore_grok_pstatus (abfd
, note
)
5560 Elf_Internal_Note
*note
;
5562 if (note
->descsz
== sizeof (pstatus_t
))
5566 memcpy (&pstat
, note
->descdata
, sizeof (pstat
));
5568 elf_tdata (abfd
)->core_pid
= pstat
.pr_pid
;
5570 #if defined (HAVE_PSTATUS32_T)
5571 else if (note
->descsz
== sizeof (pstatus32_t
))
5573 /* 64-bit host, 32-bit corefile */
5576 memcpy (&pstat
, note
->descdata
, sizeof (pstat
));
5578 elf_tdata (abfd
)->core_pid
= pstat
.pr_pid
;
5581 /* Could grab some more details from the "representative"
5582 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
5583 NT_LWPSTATUS note, presumably. */
5587 #endif /* defined (HAVE_PSTATUS_T) */
5589 #if defined (HAVE_LWPSTATUS_T)
5591 elfcore_grok_lwpstatus (abfd
, note
)
5593 Elf_Internal_Note
*note
;
5595 lwpstatus_t lwpstat
;
5600 if (note
->descsz
!= sizeof (lwpstat
))
5603 memcpy (&lwpstat
, note
->descdata
, sizeof (lwpstat
));
5605 elf_tdata (abfd
)->core_lwpid
= lwpstat
.pr_lwpid
;
5606 elf_tdata (abfd
)->core_signal
= lwpstat
.pr_cursig
;
5608 /* Make a ".reg/999" section. */
5610 sprintf (buf
, ".reg/%d", elfcore_make_pid (abfd
));
5611 name
= bfd_alloc (abfd
, strlen (buf
) + 1);
5616 sect
= bfd_make_section (abfd
, name
);
5620 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
5621 sect
->_raw_size
= sizeof (lwpstat
.pr_context
.uc_mcontext
.gregs
);
5622 sect
->filepos
= note
->descpos
5623 + offsetof (lwpstatus_t
, pr_context
.uc_mcontext
.gregs
);
5626 #if defined (HAVE_LWPSTATUS_T_PR_REG)
5627 sect
->_raw_size
= sizeof (lwpstat
.pr_reg
);
5628 sect
->filepos
= note
->descpos
+ offsetof (lwpstatus_t
, pr_reg
);
5631 sect
->flags
= SEC_HAS_CONTENTS
;
5632 sect
->alignment_power
= 2;
5634 if (!elfcore_maybe_make_sect (abfd
, ".reg", sect
))
5637 /* Make a ".reg2/999" section */
5639 sprintf (buf
, ".reg2/%d", elfcore_make_pid (abfd
));
5640 name
= bfd_alloc (abfd
, strlen (buf
) + 1);
5645 sect
= bfd_make_section (abfd
, name
);
5649 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
5650 sect
->_raw_size
= sizeof (lwpstat
.pr_context
.uc_mcontext
.fpregs
);
5651 sect
->filepos
= note
->descpos
5652 + offsetof (lwpstatus_t
, pr_context
.uc_mcontext
.fpregs
);
5655 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
5656 sect
->_raw_size
= sizeof (lwpstat
.pr_fpreg
);
5657 sect
->filepos
= note
->descpos
+ offsetof (lwpstatus_t
, pr_fpreg
);
5660 sect
->flags
= SEC_HAS_CONTENTS
;
5661 sect
->alignment_power
= 2;
5663 if (!elfcore_maybe_make_sect (abfd
, ".reg2", sect
))
5668 #endif /* defined (HAVE_LWPSTATUS_T) */
5670 #if defined (HAVE_WIN32_PSTATUS_T)
5672 elfcore_grok_win32pstatus (abfd
, note
)
5674 Elf_Internal_Note
*note
;
5679 win32_pstatus_t pstatus
;
5681 if (note
->descsz
< sizeof (pstatus
))
5684 memcpy (&pstatus
, note
->descdata
, note
->descsz
);
5686 switch (pstatus
.data_type
)
5688 case NOTE_INFO_PROCESS
:
5689 /* FIXME: need to add ->core_command. */
5690 elf_tdata (abfd
)->core_signal
= pstatus
.data
.process_info
.signal
;
5691 elf_tdata (abfd
)->core_pid
= pstatus
.data
.process_info
.pid
;
5694 case NOTE_INFO_THREAD
:
5695 /* Make a ".reg/999" section. */
5696 sprintf (buf
, ".reg/%d", pstatus
.data
.thread_info
.tid
);
5698 name
= bfd_alloc (abfd
, strlen (buf
) + 1);
5704 sect
= bfd_make_section (abfd
, name
);
5708 sect
->_raw_size
= sizeof (pstatus
.data
.thread_info
.thread_context
);
5709 sect
->filepos
= note
->descpos
+ offsetof (struct win32_pstatus
,
5710 data
.thread_info
.thread_context
);
5711 sect
->flags
= SEC_HAS_CONTENTS
;
5712 sect
->alignment_power
= 2;
5714 if (pstatus
.data
.thread_info
.is_active_thread
)
5715 if (! elfcore_maybe_make_sect (abfd
, ".reg", sect
))
5719 case NOTE_INFO_MODULE
:
5720 /* Make a ".module/xxxxxxxx" section. */
5721 sprintf (buf
, ".module/%08x", pstatus
.data
.module_info
.base_address
);
5723 name
= bfd_alloc (abfd
, strlen (buf
) + 1);
5729 sect
= bfd_make_section (abfd
, name
);
5734 sect
->_raw_size
= note
->descsz
;
5735 sect
->filepos
= note
->descpos
;
5736 sect
->flags
= SEC_HAS_CONTENTS
;
5737 sect
->alignment_power
= 2;
5746 #endif /* HAVE_WIN32_PSTATUS_T */
5749 elfcore_grok_note (abfd
, note
)
5751 Elf_Internal_Note
*note
;
5758 #if defined (HAVE_PRSTATUS_T)
5760 return elfcore_grok_prstatus (abfd
, note
);
5763 #if defined (HAVE_PSTATUS_T)
5765 return elfcore_grok_pstatus (abfd
, note
);
5768 #if defined (HAVE_LWPSTATUS_T)
5770 return elfcore_grok_lwpstatus (abfd
, note
);
5773 case NT_FPREGSET
: /* FIXME: rename to NT_PRFPREG */
5774 return elfcore_grok_prfpreg (abfd
, note
);
5776 #if defined (HAVE_WIN32_PSTATUS_T)
5777 case NT_WIN32PSTATUS
:
5778 return elfcore_grok_win32pstatus (abfd
, note
);
5781 case NT_PRXFPREG
: /* Linux SSE extension */
5782 if (note
->namesz
== 5
5783 && ! strcmp (note
->namedata
, "LINUX"))
5784 return elfcore_grok_prxfpreg (abfd
, note
);
5788 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
5791 return elfcore_grok_psinfo (abfd
, note
);
5797 elfcore_read_notes (abfd
, offset
, size
)
5808 if (bfd_seek (abfd
, offset
, SEEK_SET
) == -1)
5811 buf
= bfd_malloc ((size_t) size
);
5815 if (bfd_read (buf
, size
, 1, abfd
) != size
)
5823 while (p
< buf
+ size
)
5825 /* FIXME: bad alignment assumption. */
5826 Elf_External_Note
*xnp
= (Elf_External_Note
*) p
;
5827 Elf_Internal_Note in
;
5829 in
.type
= bfd_h_get_32 (abfd
, (bfd_byte
*) xnp
->type
);
5831 in
.namesz
= bfd_h_get_32 (abfd
, (bfd_byte
*) xnp
->namesz
);
5832 in
.namedata
= xnp
->name
;
5834 in
.descsz
= bfd_h_get_32 (abfd
, (bfd_byte
*) xnp
->descsz
);
5835 in
.descdata
= in
.namedata
+ BFD_ALIGN (in
.namesz
, 4);
5836 in
.descpos
= offset
+ (in
.descdata
- buf
);
5838 if (! elfcore_grok_note (abfd
, &in
))
5841 p
= in
.descdata
+ BFD_ALIGN (in
.descsz
, 4);
5848 /* FIXME: This function is now unnecessary. Callers can just call
5849 bfd_section_from_phdr directly. */
5852 _bfd_elfcore_section_from_phdr (abfd
, phdr
, sec_num
)
5854 Elf_Internal_Phdr
* phdr
;
5857 if (! bfd_section_from_phdr (abfd
, phdr
, sec_num
))
5863 /* Providing external access to the ELF program header table. */
5865 /* Return an upper bound on the number of bytes required to store a
5866 copy of ABFD's program header table entries. Return -1 if an error
5867 occurs; bfd_get_error will return an appropriate code. */
5870 bfd_get_elf_phdr_upper_bound (abfd
)
5873 if (abfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
5875 bfd_set_error (bfd_error_wrong_format
);
5879 return (elf_elfheader (abfd
)->e_phnum
5880 * sizeof (Elf_Internal_Phdr
));
5883 /* Copy ABFD's program header table entries to *PHDRS. The entries
5884 will be stored as an array of Elf_Internal_Phdr structures, as
5885 defined in include/elf/internal.h. To find out how large the
5886 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
5888 Return the number of program header table entries read, or -1 if an
5889 error occurs; bfd_get_error will return an appropriate code. */
5892 bfd_get_elf_phdrs (abfd
, phdrs
)
5898 if (abfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
5900 bfd_set_error (bfd_error_wrong_format
);
5904 num_phdrs
= elf_elfheader (abfd
)->e_phnum
;
5905 memcpy (phdrs
, elf_tdata (abfd
)->phdr
,
5906 num_phdrs
* sizeof (Elf_Internal_Phdr
));