1 /* ELF executable support for BFD.
2 Copyright 1993, 1994, 1995, 1996 Free Software Foundation, Inc.
4 This file is part of BFD, the Binary File Descriptor library.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
25 BFD support for ELF formats is being worked on.
26 Currently, the best supported back ends are for sparc and i386
27 (running svr4 or Solaris 2).
29 Documentation of the internals of the support code still needs
30 to be written. The code is changing quickly enough that we
41 static INLINE
struct elf_segment_map
*make_mapping
42 PARAMS ((bfd
*, asection
**, unsigned int, unsigned int, boolean
));
43 static int elf_sort_sections
PARAMS ((const PTR
, const PTR
));
44 static boolean assign_file_positions_for_segments
PARAMS ((bfd
*));
45 static boolean assign_file_positions_except_relocs
PARAMS ((bfd
*));
46 static boolean prep_headers
PARAMS ((bfd
*));
47 static boolean swap_out_syms
PARAMS ((bfd
*, struct bfd_strtab_hash
**));
48 static boolean copy_private_bfd_data
PARAMS ((bfd
*, bfd
*));
50 /* Standard ELF hash function. Do not change this function; you will
51 cause invalid hash tables to be generated. (Well, you would if this
52 were being used yet.) */
55 CONST
unsigned char *name
;
61 while ((ch
= *name
++) != '\0')
64 if ((g
= (h
& 0xf0000000)) != 0)
73 /* Read a specified number of bytes at a specified offset in an ELF
74 file, into a newly allocated buffer, and return a pointer to the
78 elf_read (abfd
, offset
, size
)
85 if ((buf
= bfd_alloc (abfd
, size
)) == NULL
)
87 if (bfd_seek (abfd
, offset
, SEEK_SET
) == -1)
89 if (bfd_read ((PTR
) buf
, size
, 1, abfd
) != size
)
91 if (bfd_get_error () != bfd_error_system_call
)
92 bfd_set_error (bfd_error_file_truncated
);
102 /* this just does initialization */
103 /* coff_mkobject zalloc's space for tdata.coff_obj_data ... */
104 elf_tdata (abfd
) = (struct elf_obj_tdata
*)
105 bfd_zalloc (abfd
, sizeof (struct elf_obj_tdata
));
106 if (elf_tdata (abfd
) == 0)
108 /* since everything is done at close time, do we need any
115 bfd_elf_get_str_section (abfd
, shindex
)
117 unsigned int shindex
;
119 Elf_Internal_Shdr
**i_shdrp
;
120 char *shstrtab
= NULL
;
122 unsigned int shstrtabsize
;
124 i_shdrp
= elf_elfsections (abfd
);
125 if (i_shdrp
== 0 || i_shdrp
[shindex
] == 0)
128 shstrtab
= (char *) i_shdrp
[shindex
]->contents
;
129 if (shstrtab
== NULL
)
131 /* No cached one, attempt to read, and cache what we read. */
132 offset
= i_shdrp
[shindex
]->sh_offset
;
133 shstrtabsize
= i_shdrp
[shindex
]->sh_size
;
134 shstrtab
= elf_read (abfd
, offset
, shstrtabsize
);
135 i_shdrp
[shindex
]->contents
= (PTR
) shstrtab
;
141 bfd_elf_string_from_elf_section (abfd
, shindex
, strindex
)
143 unsigned int shindex
;
144 unsigned int strindex
;
146 Elf_Internal_Shdr
*hdr
;
151 hdr
= elf_elfsections (abfd
)[shindex
];
153 if (hdr
->contents
== NULL
154 && bfd_elf_get_str_section (abfd
, shindex
) == NULL
)
157 return ((char *) hdr
->contents
) + strindex
;
160 /* Make a BFD section from an ELF section. We store a pointer to the
161 BFD section in the bfd_section field of the header. */
164 _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
)
166 Elf_Internal_Shdr
*hdr
;
172 if (hdr
->bfd_section
!= NULL
)
174 BFD_ASSERT (strcmp (name
,
175 bfd_get_section_name (abfd
, hdr
->bfd_section
)) == 0);
179 newsect
= bfd_make_section_anyway (abfd
, name
);
183 newsect
->filepos
= hdr
->sh_offset
;
185 if (! bfd_set_section_vma (abfd
, newsect
, hdr
->sh_addr
)
186 || ! bfd_set_section_size (abfd
, newsect
, hdr
->sh_size
)
187 || ! bfd_set_section_alignment (abfd
, newsect
,
188 bfd_log2 (hdr
->sh_addralign
)))
191 flags
= SEC_NO_FLAGS
;
192 if (hdr
->sh_type
!= SHT_NOBITS
)
193 flags
|= SEC_HAS_CONTENTS
;
194 if ((hdr
->sh_flags
& SHF_ALLOC
) != 0)
197 if (hdr
->sh_type
!= SHT_NOBITS
)
200 if ((hdr
->sh_flags
& SHF_WRITE
) == 0)
201 flags
|= SEC_READONLY
;
202 if ((hdr
->sh_flags
& SHF_EXECINSTR
) != 0)
204 else if ((flags
& SEC_LOAD
) != 0)
207 /* The debugging sections appear to be recognized only by name, not
209 if (strncmp (name
, ".debug", sizeof ".debug" - 1) == 0
210 || strncmp (name
, ".line", sizeof ".line" - 1) == 0
211 || strncmp (name
, ".stab", sizeof ".stab" - 1) == 0)
212 flags
|= SEC_DEBUGGING
;
214 if (! bfd_set_section_flags (abfd
, newsect
, flags
))
217 if ((flags
& SEC_ALLOC
) != 0)
219 Elf_Internal_Phdr
*phdr
;
222 /* Look through the phdrs to see if we need to adjust the lma. */
223 phdr
= elf_tdata (abfd
)->phdr
;
224 for (i
= 0; i
< elf_elfheader (abfd
)->e_phnum
; i
++, phdr
++)
226 if (phdr
->p_type
== PT_LOAD
227 && phdr
->p_paddr
!= 0
228 && phdr
->p_vaddr
!= phdr
->p_paddr
229 && phdr
->p_vaddr
<= hdr
->sh_addr
230 && phdr
->p_vaddr
+ phdr
->p_memsz
>= hdr
->sh_addr
+ hdr
->sh_size
)
232 newsect
->lma
+= phdr
->p_paddr
- phdr
->p_vaddr
;
238 hdr
->bfd_section
= newsect
;
239 elf_section_data (newsect
)->this_hdr
= *hdr
;
249 struct elf_internal_shdr *bfd_elf_find_section (bfd *abfd, char *name);
252 Helper functions for GDB to locate the string tables.
253 Since BFD hides string tables from callers, GDB needs to use an
254 internal hook to find them. Sun's .stabstr, in particular,
255 isn't even pointed to by the .stab section, so ordinary
256 mechanisms wouldn't work to find it, even if we had some.
259 struct elf_internal_shdr
*
260 bfd_elf_find_section (abfd
, name
)
264 Elf_Internal_Shdr
**i_shdrp
;
269 i_shdrp
= elf_elfsections (abfd
);
272 shstrtab
= bfd_elf_get_str_section (abfd
, elf_elfheader (abfd
)->e_shstrndx
);
273 if (shstrtab
!= NULL
)
275 max
= elf_elfheader (abfd
)->e_shnum
;
276 for (i
= 1; i
< max
; i
++)
277 if (!strcmp (&shstrtab
[i_shdrp
[i
]->sh_name
], name
))
284 const char *const bfd_elf_section_type_names
[] = {
285 "SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB",
286 "SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE",
287 "SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM",
290 /* ELF relocs are against symbols. If we are producing relocateable
291 output, and the reloc is against an external symbol, and nothing
292 has given us any additional addend, the resulting reloc will also
293 be against the same symbol. In such a case, we don't want to
294 change anything about the way the reloc is handled, since it will
295 all be done at final link time. Rather than put special case code
296 into bfd_perform_relocation, all the reloc types use this howto
297 function. It just short circuits the reloc if producing
298 relocateable output against an external symbol. */
301 bfd_reloc_status_type
302 bfd_elf_generic_reloc (abfd
,
310 arelent
*reloc_entry
;
313 asection
*input_section
;
315 char **error_message
;
317 if (output_bfd
!= (bfd
*) NULL
318 && (symbol
->flags
& BSF_SECTION_SYM
) == 0
319 && (! reloc_entry
->howto
->partial_inplace
320 || reloc_entry
->addend
== 0))
322 reloc_entry
->address
+= input_section
->output_offset
;
326 return bfd_reloc_continue
;
329 /* Print out the program headers. */
332 _bfd_elf_print_private_bfd_data (abfd
, farg
)
336 FILE *f
= (FILE *) farg
;
337 Elf_Internal_Phdr
*p
;
339 bfd_byte
*dynbuf
= NULL
;
341 p
= elf_tdata (abfd
)->phdr
;
346 fprintf (f
, "\nProgram Header:\n");
347 c
= elf_elfheader (abfd
)->e_phnum
;
348 for (i
= 0; i
< c
; i
++, p
++)
355 case PT_NULL
: s
= "NULL"; break;
356 case PT_LOAD
: s
= "LOAD"; break;
357 case PT_DYNAMIC
: s
= "DYNAMIC"; break;
358 case PT_INTERP
: s
= "INTERP"; break;
359 case PT_NOTE
: s
= "NOTE"; break;
360 case PT_SHLIB
: s
= "SHLIB"; break;
361 case PT_PHDR
: s
= "PHDR"; break;
362 default: sprintf (buf
, "0x%lx", p
->p_type
); s
= buf
; break;
364 fprintf (f
, "%8s off 0x", s
);
365 fprintf_vma (f
, p
->p_offset
);
366 fprintf (f
, " vaddr 0x");
367 fprintf_vma (f
, p
->p_vaddr
);
368 fprintf (f
, " paddr 0x");
369 fprintf_vma (f
, p
->p_paddr
);
370 fprintf (f
, " align 2**%u\n", bfd_log2 (p
->p_align
));
371 fprintf (f
, " filesz 0x");
372 fprintf_vma (f
, p
->p_filesz
);
373 fprintf (f
, " memsz 0x");
374 fprintf_vma (f
, p
->p_memsz
);
375 fprintf (f
, " flags %c%c%c",
376 (p
->p_flags
& PF_R
) != 0 ? 'r' : '-',
377 (p
->p_flags
& PF_W
) != 0 ? 'w' : '-',
378 (p
->p_flags
& PF_X
) != 0 ? 'x' : '-');
379 if ((p
->p_flags
&~ (PF_R
| PF_W
| PF_X
)) != 0)
380 fprintf (f
, " %lx", p
->p_flags
&~ (PF_R
| PF_W
| PF_X
));
385 s
= bfd_get_section_by_name (abfd
, ".dynamic");
390 bfd_byte
*extdyn
, *extdynend
;
392 void (*swap_dyn_in
) PARAMS ((bfd
*, const PTR
, Elf_Internal_Dyn
*));
394 fprintf (f
, "\nDynamic Section:\n");
396 dynbuf
= (bfd_byte
*) bfd_malloc (s
->_raw_size
);
399 if (! bfd_get_section_contents (abfd
, s
, (PTR
) dynbuf
, (file_ptr
) 0,
403 elfsec
= _bfd_elf_section_from_bfd_section (abfd
, s
);
406 link
= elf_elfsections (abfd
)[elfsec
]->sh_link
;
408 extdynsize
= get_elf_backend_data (abfd
)->s
->sizeof_dyn
;
409 swap_dyn_in
= get_elf_backend_data (abfd
)->s
->swap_dyn_in
;
412 extdynend
= extdyn
+ s
->_raw_size
;
413 for (; extdyn
< extdynend
; extdyn
+= extdynsize
)
415 Elf_Internal_Dyn dyn
;
420 (*swap_dyn_in
) (abfd
, (PTR
) extdyn
, &dyn
);
422 if (dyn
.d_tag
== DT_NULL
)
429 sprintf (ab
, "0x%lx", (unsigned long) dyn
.d_tag
);
433 case DT_NEEDED
: name
= "NEEDED"; stringp
= true; break;
434 case DT_PLTRELSZ
: name
= "PLTRELSZ"; break;
435 case DT_PLTGOT
: name
= "PLTGOT"; break;
436 case DT_HASH
: name
= "HASH"; break;
437 case DT_STRTAB
: name
= "STRTAB"; break;
438 case DT_SYMTAB
: name
= "SYMTAB"; break;
439 case DT_RELA
: name
= "RELA"; break;
440 case DT_RELASZ
: name
= "RELASZ"; break;
441 case DT_RELAENT
: name
= "RELAENT"; break;
442 case DT_STRSZ
: name
= "STRSZ"; break;
443 case DT_SYMENT
: name
= "SYMENT"; break;
444 case DT_INIT
: name
= "INIT"; break;
445 case DT_FINI
: name
= "FINI"; break;
446 case DT_SONAME
: name
= "SONAME"; stringp
= true; break;
447 case DT_RPATH
: name
= "RPATH"; stringp
= true; break;
448 case DT_SYMBOLIC
: name
= "SYMBOLIC"; break;
449 case DT_REL
: name
= "REL"; break;
450 case DT_RELSZ
: name
= "RELSZ"; break;
451 case DT_RELENT
: name
= "RELENT"; break;
452 case DT_PLTREL
: name
= "PLTREL"; break;
453 case DT_DEBUG
: name
= "DEBUG"; break;
454 case DT_TEXTREL
: name
= "TEXTREL"; break;
455 case DT_JMPREL
: name
= "JMPREL"; break;
458 fprintf (f
, " %-11s ", name
);
460 fprintf (f
, "0x%lx", (unsigned long) dyn
.d_un
.d_val
);
465 string
= bfd_elf_string_from_elf_section (abfd
, link
,
469 fprintf (f
, "%s", string
);
486 /* Display ELF-specific fields of a symbol. */
488 bfd_elf_print_symbol (ignore_abfd
, filep
, symbol
, how
)
492 bfd_print_symbol_type how
;
494 FILE *file
= (FILE *) filep
;
497 case bfd_print_symbol_name
:
498 fprintf (file
, "%s", symbol
->name
);
500 case bfd_print_symbol_more
:
501 fprintf (file
, "elf ");
502 fprintf_vma (file
, symbol
->value
);
503 fprintf (file
, " %lx", (long) symbol
->flags
);
505 case bfd_print_symbol_all
:
507 CONST
char *section_name
;
508 section_name
= symbol
->section
? symbol
->section
->name
: "(*none*)";
509 bfd_print_symbol_vandf ((PTR
) file
, symbol
);
510 fprintf (file
, " %s\t", section_name
);
511 /* Print the "other" value for a symbol. For common symbols,
512 we've already printed the size; now print the alignment.
513 For other symbols, we have no specified alignment, and
514 we've printed the address; now print the size. */
516 (bfd_is_com_section (symbol
->section
)
517 ? ((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_value
518 : ((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_size
));
519 fprintf (file
, " %s", symbol
->name
);
525 /* Create an entry in an ELF linker hash table. */
527 struct bfd_hash_entry
*
528 _bfd_elf_link_hash_newfunc (entry
, table
, string
)
529 struct bfd_hash_entry
*entry
;
530 struct bfd_hash_table
*table
;
533 struct elf_link_hash_entry
*ret
= (struct elf_link_hash_entry
*) entry
;
535 /* Allocate the structure if it has not already been allocated by a
537 if (ret
== (struct elf_link_hash_entry
*) NULL
)
538 ret
= ((struct elf_link_hash_entry
*)
539 bfd_hash_allocate (table
, sizeof (struct elf_link_hash_entry
)));
540 if (ret
== (struct elf_link_hash_entry
*) NULL
)
541 return (struct bfd_hash_entry
*) ret
;
543 /* Call the allocation method of the superclass. */
544 ret
= ((struct elf_link_hash_entry
*)
545 _bfd_link_hash_newfunc ((struct bfd_hash_entry
*) ret
,
547 if (ret
!= (struct elf_link_hash_entry
*) NULL
)
549 /* Set local fields. */
553 ret
->dynstr_index
= 0;
555 ret
->got_offset
= (bfd_vma
) -1;
556 ret
->plt_offset
= (bfd_vma
) -1;
557 ret
->linker_section_pointer
= (elf_linker_section_pointers_t
*)0;
558 ret
->type
= STT_NOTYPE
;
559 /* Assume that we have been called by a non-ELF symbol reader.
560 This flag is then reset by the code which reads an ELF input
561 file. This ensures that a symbol created by a non-ELF symbol
562 reader will have the flag set correctly. */
563 ret
->elf_link_hash_flags
= ELF_LINK_NON_ELF
;
566 return (struct bfd_hash_entry
*) ret
;
569 /* Initialize an ELF linker hash table. */
572 _bfd_elf_link_hash_table_init (table
, abfd
, newfunc
)
573 struct elf_link_hash_table
*table
;
575 struct bfd_hash_entry
*(*newfunc
) PARAMS ((struct bfd_hash_entry
*,
576 struct bfd_hash_table
*,
579 table
->dynamic_sections_created
= false;
580 table
->dynobj
= NULL
;
581 /* The first dynamic symbol is a dummy. */
582 table
->dynsymcount
= 1;
583 table
->dynstr
= NULL
;
584 table
->bucketcount
= 0;
585 table
->needed
= NULL
;
587 table
->stab_info
= NULL
;
588 return _bfd_link_hash_table_init (&table
->root
, abfd
, newfunc
);
591 /* Create an ELF linker hash table. */
593 struct bfd_link_hash_table
*
594 _bfd_elf_link_hash_table_create (abfd
)
597 struct elf_link_hash_table
*ret
;
599 ret
= ((struct elf_link_hash_table
*)
600 bfd_alloc (abfd
, sizeof (struct elf_link_hash_table
)));
601 if (ret
== (struct elf_link_hash_table
*) NULL
)
604 if (! _bfd_elf_link_hash_table_init (ret
, abfd
, _bfd_elf_link_hash_newfunc
))
606 bfd_release (abfd
, ret
);
613 /* This is a hook for the ELF emulation code in the generic linker to
614 tell the backend linker what file name to use for the DT_NEEDED
615 entry for a dynamic object. The generic linker passes name as an
616 empty string to indicate that no DT_NEEDED entry should be made. */
619 bfd_elf_set_dt_needed_name (abfd
, name
)
623 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
624 && bfd_get_format (abfd
) == bfd_object
)
625 elf_dt_name (abfd
) = name
;
628 /* Get the list of DT_NEEDED entries for a link. This is a hook for
629 the ELF emulation code. */
631 struct bfd_link_needed_list
*
632 bfd_elf_get_needed_list (abfd
, info
)
634 struct bfd_link_info
*info
;
636 if (info
->hash
->creator
->flavour
!= bfd_target_elf_flavour
)
638 return elf_hash_table (info
)->needed
;
641 /* Get the name actually used for a dynamic object for a link. This
642 is the SONAME entry if there is one. Otherwise, it is the string
643 passed to bfd_elf_set_dt_needed_name, or it is the filename. */
646 bfd_elf_get_dt_soname (abfd
)
649 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
650 && bfd_get_format (abfd
) == bfd_object
)
651 return elf_dt_name (abfd
);
655 /* Allocate an ELF string table--force the first byte to be zero. */
657 struct bfd_strtab_hash
*
658 _bfd_elf_stringtab_init ()
660 struct bfd_strtab_hash
*ret
;
662 ret
= _bfd_stringtab_init ();
667 loc
= _bfd_stringtab_add (ret
, "", true, false);
668 BFD_ASSERT (loc
== 0 || loc
== (bfd_size_type
) -1);
669 if (loc
== (bfd_size_type
) -1)
671 _bfd_stringtab_free (ret
);
678 /* ELF .o/exec file reading */
680 /* Create a new bfd section from an ELF section header. */
683 bfd_section_from_shdr (abfd
, shindex
)
685 unsigned int shindex
;
687 Elf_Internal_Shdr
*hdr
= elf_elfsections (abfd
)[shindex
];
688 Elf_Internal_Ehdr
*ehdr
= elf_elfheader (abfd
);
689 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
692 name
= elf_string_from_elf_strtab (abfd
, hdr
->sh_name
);
694 switch (hdr
->sh_type
)
697 /* Inactive section. Throw it away. */
700 case SHT_PROGBITS
: /* Normal section with contents. */
701 case SHT_DYNAMIC
: /* Dynamic linking information. */
702 case SHT_NOBITS
: /* .bss section. */
703 case SHT_HASH
: /* .hash section. */
704 case SHT_NOTE
: /* .note section. */
705 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
707 case SHT_SYMTAB
: /* A symbol table */
708 if (elf_onesymtab (abfd
) == shindex
)
711 BFD_ASSERT (hdr
->sh_entsize
== bed
->s
->sizeof_sym
);
712 BFD_ASSERT (elf_onesymtab (abfd
) == 0);
713 elf_onesymtab (abfd
) = shindex
;
714 elf_tdata (abfd
)->symtab_hdr
= *hdr
;
715 elf_elfsections (abfd
)[shindex
] = hdr
= &elf_tdata (abfd
)->symtab_hdr
;
716 abfd
->flags
|= HAS_SYMS
;
718 /* Sometimes a shared object will map in the symbol table. If
719 SHF_ALLOC is set, and this is a shared object, then we also
720 treat this section as a BFD section. We can not base the
721 decision purely on SHF_ALLOC, because that flag is sometimes
722 set in a relocateable object file, which would confuse the
724 if ((hdr
->sh_flags
& SHF_ALLOC
) != 0
725 && (abfd
->flags
& DYNAMIC
) != 0
726 && ! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
))
731 case SHT_DYNSYM
: /* A dynamic symbol table */
732 if (elf_dynsymtab (abfd
) == shindex
)
735 BFD_ASSERT (hdr
->sh_entsize
== bed
->s
->sizeof_sym
);
736 BFD_ASSERT (elf_dynsymtab (abfd
) == 0);
737 elf_dynsymtab (abfd
) = shindex
;
738 elf_tdata (abfd
)->dynsymtab_hdr
= *hdr
;
739 elf_elfsections (abfd
)[shindex
] = hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
740 abfd
->flags
|= HAS_SYMS
;
742 /* Besides being a symbol table, we also treat this as a regular
743 section, so that objcopy can handle it. */
744 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
746 case SHT_STRTAB
: /* A string table */
747 if (hdr
->bfd_section
!= NULL
)
749 if (ehdr
->e_shstrndx
== shindex
)
751 elf_tdata (abfd
)->shstrtab_hdr
= *hdr
;
752 elf_elfsections (abfd
)[shindex
] = &elf_tdata (abfd
)->shstrtab_hdr
;
758 for (i
= 1; i
< ehdr
->e_shnum
; i
++)
760 Elf_Internal_Shdr
*hdr2
= elf_elfsections (abfd
)[i
];
761 if (hdr2
->sh_link
== shindex
)
763 if (! bfd_section_from_shdr (abfd
, i
))
765 if (elf_onesymtab (abfd
) == i
)
767 elf_tdata (abfd
)->strtab_hdr
= *hdr
;
768 elf_elfsections (abfd
)[shindex
] =
769 &elf_tdata (abfd
)->strtab_hdr
;
772 if (elf_dynsymtab (abfd
) == i
)
774 elf_tdata (abfd
)->dynstrtab_hdr
= *hdr
;
775 elf_elfsections (abfd
)[shindex
] = hdr
=
776 &elf_tdata (abfd
)->dynstrtab_hdr
;
777 /* We also treat this as a regular section, so
778 that objcopy can handle it. */
781 #if 0 /* Not handling other string tables specially right now. */
782 hdr2
= elf_elfsections (abfd
)[i
]; /* in case it moved */
783 /* We have a strtab for some random other section. */
784 newsect
= (asection
*) hdr2
->bfd_section
;
787 hdr
->bfd_section
= newsect
;
788 hdr2
= &elf_section_data (newsect
)->str_hdr
;
790 elf_elfsections (abfd
)[shindex
] = hdr2
;
796 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
800 /* *These* do a lot of work -- but build no sections! */
802 asection
*target_sect
;
803 Elf_Internal_Shdr
*hdr2
;
805 /* For some incomprehensible reason Oracle distributes
806 libraries for Solaris in which some of the objects have
807 bogus sh_link fields. It would be nice if we could just
808 reject them, but, unfortunately, some people need to use
809 them. We scan through the section headers; if we find only
810 one suitable symbol table, we clobber the sh_link to point
811 to it. I hope this doesn't break anything. */
812 if (elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_SYMTAB
813 && elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_DYNSYM
)
819 for (scan
= 1; scan
< ehdr
->e_shnum
; scan
++)
821 if (elf_elfsections (abfd
)[scan
]->sh_type
== SHT_SYMTAB
822 || elf_elfsections (abfd
)[scan
]->sh_type
== SHT_DYNSYM
)
833 hdr
->sh_link
= found
;
836 /* Get the symbol table. */
837 if (elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
== SHT_SYMTAB
838 && ! bfd_section_from_shdr (abfd
, hdr
->sh_link
))
841 /* If this reloc section does not use the main symbol table we
842 don't treat it as a reloc section. BFD can't adequately
843 represent such a section, so at least for now, we don't
844 try. We just present it as a normal section. */
845 if (hdr
->sh_link
!= elf_onesymtab (abfd
))
846 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
);
848 if (! bfd_section_from_shdr (abfd
, hdr
->sh_info
))
850 target_sect
= bfd_section_from_elf_index (abfd
, hdr
->sh_info
);
851 if (target_sect
== NULL
)
854 if ((target_sect
->flags
& SEC_RELOC
) == 0
855 || target_sect
->reloc_count
== 0)
856 hdr2
= &elf_section_data (target_sect
)->rel_hdr
;
859 BFD_ASSERT (elf_section_data (target_sect
)->rel_hdr2
== NULL
);
860 hdr2
= (Elf_Internal_Shdr
*) bfd_alloc (abfd
, sizeof (*hdr2
));
861 elf_section_data (target_sect
)->rel_hdr2
= hdr2
;
864 elf_elfsections (abfd
)[shindex
] = hdr2
;
865 target_sect
->reloc_count
+= hdr
->sh_size
/ hdr
->sh_entsize
;
866 target_sect
->flags
|= SEC_RELOC
;
867 target_sect
->relocation
= NULL
;
868 target_sect
->rel_filepos
= hdr
->sh_offset
;
869 abfd
->flags
|= HAS_RELOC
;
878 /* Check for any processor-specific section types. */
880 if (bed
->elf_backend_section_from_shdr
)
881 (*bed
->elf_backend_section_from_shdr
) (abfd
, hdr
, name
);
889 /* Given an ELF section number, retrieve the corresponding BFD
893 bfd_section_from_elf_index (abfd
, index
)
897 BFD_ASSERT (index
> 0 && index
< SHN_LORESERVE
);
898 if (index
>= elf_elfheader (abfd
)->e_shnum
)
900 return elf_elfsections (abfd
)[index
]->bfd_section
;
904 _bfd_elf_new_section_hook (abfd
, sec
)
908 struct bfd_elf_section_data
*sdata
;
910 sdata
= (struct bfd_elf_section_data
*) bfd_alloc (abfd
, sizeof (*sdata
));
913 sec
->used_by_bfd
= (PTR
) sdata
;
914 memset (sdata
, 0, sizeof (*sdata
));
918 /* Create a new bfd section from an ELF program header.
920 Since program segments have no names, we generate a synthetic name
921 of the form segment<NUM>, where NUM is generally the index in the
922 program header table. For segments that are split (see below) we
923 generate the names segment<NUM>a and segment<NUM>b.
925 Note that some program segments may have a file size that is different than
926 (less than) the memory size. All this means is that at execution the
927 system must allocate the amount of memory specified by the memory size,
928 but only initialize it with the first "file size" bytes read from the
929 file. This would occur for example, with program segments consisting
930 of combined data+bss.
932 To handle the above situation, this routine generates TWO bfd sections
933 for the single program segment. The first has the length specified by
934 the file size of the segment, and the second has the length specified
935 by the difference between the two sizes. In effect, the segment is split
936 into it's initialized and uninitialized parts.
941 bfd_section_from_phdr (abfd
, hdr
, index
)
943 Elf_Internal_Phdr
*hdr
;
951 split
= ((hdr
->p_memsz
> 0) &&
952 (hdr
->p_filesz
> 0) &&
953 (hdr
->p_memsz
> hdr
->p_filesz
));
954 sprintf (namebuf
, split
? "segment%da" : "segment%d", index
);
955 name
= bfd_alloc (abfd
, strlen (namebuf
) + 1);
958 strcpy (name
, namebuf
);
959 newsect
= bfd_make_section (abfd
, name
);
962 newsect
->vma
= hdr
->p_vaddr
;
963 newsect
->lma
= hdr
->p_paddr
;
964 newsect
->_raw_size
= hdr
->p_filesz
;
965 newsect
->filepos
= hdr
->p_offset
;
966 newsect
->flags
|= SEC_HAS_CONTENTS
;
967 if (hdr
->p_type
== PT_LOAD
)
969 newsect
->flags
|= SEC_ALLOC
;
970 newsect
->flags
|= SEC_LOAD
;
971 if (hdr
->p_flags
& PF_X
)
973 /* FIXME: all we known is that it has execute PERMISSION,
975 newsect
->flags
|= SEC_CODE
;
978 if (!(hdr
->p_flags
& PF_W
))
980 newsect
->flags
|= SEC_READONLY
;
985 sprintf (namebuf
, "segment%db", index
);
986 name
= bfd_alloc (abfd
, strlen (namebuf
) + 1);
989 strcpy (name
, namebuf
);
990 newsect
= bfd_make_section (abfd
, name
);
993 newsect
->vma
= hdr
->p_vaddr
+ hdr
->p_filesz
;
994 newsect
->lma
= hdr
->p_paddr
+ hdr
->p_filesz
;
995 newsect
->_raw_size
= hdr
->p_memsz
- hdr
->p_filesz
;
996 if (hdr
->p_type
== PT_LOAD
)
998 newsect
->flags
|= SEC_ALLOC
;
999 if (hdr
->p_flags
& PF_X
)
1000 newsect
->flags
|= SEC_CODE
;
1002 if (!(hdr
->p_flags
& PF_W
))
1003 newsect
->flags
|= SEC_READONLY
;
1009 /* Set up an ELF internal section header for a section. */
1013 elf_fake_sections (abfd
, asect
, failedptrarg
)
1018 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
1019 boolean
*failedptr
= (boolean
*) failedptrarg
;
1020 Elf_Internal_Shdr
*this_hdr
;
1024 /* We already failed; just get out of the bfd_map_over_sections
1029 this_hdr
= &elf_section_data (asect
)->this_hdr
;
1031 this_hdr
->sh_name
= (unsigned long) _bfd_stringtab_add (elf_shstrtab (abfd
),
1034 if (this_hdr
->sh_name
== (unsigned long) -1)
1040 this_hdr
->sh_flags
= 0;
1042 if ((asect
->flags
& SEC_ALLOC
) != 0)
1043 this_hdr
->sh_addr
= asect
->vma
;
1045 this_hdr
->sh_addr
= 0;
1047 this_hdr
->sh_offset
= 0;
1048 this_hdr
->sh_size
= asect
->_raw_size
;
1049 this_hdr
->sh_link
= 0;
1050 this_hdr
->sh_addralign
= 1 << asect
->alignment_power
;
1051 /* The sh_entsize and sh_info fields may have been set already by
1052 copy_private_section_data. */
1054 this_hdr
->bfd_section
= asect
;
1055 this_hdr
->contents
= NULL
;
1057 /* FIXME: This should not be based on section names. */
1058 if (strcmp (asect
->name
, ".dynstr") == 0)
1059 this_hdr
->sh_type
= SHT_STRTAB
;
1060 else if (strcmp (asect
->name
, ".hash") == 0)
1062 this_hdr
->sh_type
= SHT_HASH
;
1063 this_hdr
->sh_entsize
= bed
->s
->arch_size
/ 8;
1065 else if (strcmp (asect
->name
, ".dynsym") == 0)
1067 this_hdr
->sh_type
= SHT_DYNSYM
;
1068 this_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
1070 else if (strcmp (asect
->name
, ".dynamic") == 0)
1072 this_hdr
->sh_type
= SHT_DYNAMIC
;
1073 this_hdr
->sh_entsize
= bed
->s
->sizeof_dyn
;
1075 else if (strncmp (asect
->name
, ".rela", 5) == 0
1076 && get_elf_backend_data (abfd
)->use_rela_p
)
1078 this_hdr
->sh_type
= SHT_RELA
;
1079 this_hdr
->sh_entsize
= bed
->s
->sizeof_rela
;
1081 else if (strncmp (asect
->name
, ".rel", 4) == 0
1082 && ! get_elf_backend_data (abfd
)->use_rela_p
)
1084 this_hdr
->sh_type
= SHT_REL
;
1085 this_hdr
->sh_entsize
= bed
->s
->sizeof_rel
;
1087 else if (strcmp (asect
->name
, ".note") == 0)
1088 this_hdr
->sh_type
= SHT_NOTE
;
1089 else if (strncmp (asect
->name
, ".stab", 5) == 0
1090 && strcmp (asect
->name
+ strlen (asect
->name
) - 3, "str") == 0)
1091 this_hdr
->sh_type
= SHT_STRTAB
;
1092 else if ((asect
->flags
& SEC_ALLOC
) != 0
1093 && (asect
->flags
& SEC_LOAD
) != 0)
1094 this_hdr
->sh_type
= SHT_PROGBITS
;
1095 else if ((asect
->flags
& SEC_ALLOC
) != 0
1096 && ((asect
->flags
& SEC_LOAD
) == 0))
1097 this_hdr
->sh_type
= SHT_NOBITS
;
1101 this_hdr
->sh_type
= SHT_PROGBITS
;
1104 if ((asect
->flags
& SEC_ALLOC
) != 0)
1105 this_hdr
->sh_flags
|= SHF_ALLOC
;
1106 if ((asect
->flags
& SEC_READONLY
) == 0)
1107 this_hdr
->sh_flags
|= SHF_WRITE
;
1108 if ((asect
->flags
& SEC_CODE
) != 0)
1109 this_hdr
->sh_flags
|= SHF_EXECINSTR
;
1111 /* Check for processor-specific section types. */
1113 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
1115 if (bed
->elf_backend_fake_sections
)
1116 (*bed
->elf_backend_fake_sections
) (abfd
, this_hdr
, asect
);
1119 /* If the section has relocs, set up a section header for the
1120 SHT_REL[A] section. */
1121 if ((asect
->flags
& SEC_RELOC
) != 0)
1123 Elf_Internal_Shdr
*rela_hdr
;
1124 int use_rela_p
= get_elf_backend_data (abfd
)->use_rela_p
;
1127 rela_hdr
= &elf_section_data (asect
)->rel_hdr
;
1128 name
= bfd_alloc (abfd
, sizeof ".rela" + strlen (asect
->name
));
1134 sprintf (name
, "%s%s", use_rela_p
? ".rela" : ".rel", asect
->name
);
1136 (unsigned int) _bfd_stringtab_add (elf_shstrtab (abfd
), name
,
1138 if (rela_hdr
->sh_name
== (unsigned int) -1)
1143 rela_hdr
->sh_type
= use_rela_p
? SHT_RELA
: SHT_REL
;
1144 rela_hdr
->sh_entsize
= (use_rela_p
1145 ? bed
->s
->sizeof_rela
1146 : bed
->s
->sizeof_rel
);
1147 rela_hdr
->sh_addralign
= bed
->s
->file_align
;
1148 rela_hdr
->sh_flags
= 0;
1149 rela_hdr
->sh_addr
= 0;
1150 rela_hdr
->sh_size
= 0;
1151 rela_hdr
->sh_offset
= 0;
1155 /* Assign all ELF section numbers. The dummy first section is handled here
1156 too. The link/info pointers for the standard section types are filled
1157 in here too, while we're at it. */
1160 assign_section_numbers (abfd
)
1163 struct elf_obj_tdata
*t
= elf_tdata (abfd
);
1165 unsigned int section_number
;
1166 Elf_Internal_Shdr
**i_shdrp
;
1167 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
1171 for (sec
= abfd
->sections
; sec
; sec
= sec
->next
)
1173 struct bfd_elf_section_data
*d
= elf_section_data (sec
);
1175 d
->this_idx
= section_number
++;
1176 if ((sec
->flags
& SEC_RELOC
) == 0)
1179 d
->rel_idx
= section_number
++;
1182 t
->shstrtab_section
= section_number
++;
1183 elf_elfheader (abfd
)->e_shstrndx
= t
->shstrtab_section
;
1184 t
->shstrtab_hdr
.sh_size
= _bfd_stringtab_size (elf_shstrtab (abfd
));
1186 if (abfd
->symcount
> 0)
1188 t
->symtab_section
= section_number
++;
1189 t
->strtab_section
= section_number
++;
1192 elf_elfheader (abfd
)->e_shnum
= section_number
;
1194 /* Set up the list of section header pointers, in agreement with the
1196 i_shdrp
= ((Elf_Internal_Shdr
**)
1197 bfd_alloc (abfd
, section_number
* sizeof (Elf_Internal_Shdr
*)));
1198 if (i_shdrp
== NULL
)
1201 i_shdrp
[0] = ((Elf_Internal_Shdr
*)
1202 bfd_alloc (abfd
, sizeof (Elf_Internal_Shdr
)));
1203 if (i_shdrp
[0] == NULL
)
1205 bfd_release (abfd
, i_shdrp
);
1208 memset (i_shdrp
[0], 0, sizeof (Elf_Internal_Shdr
));
1210 elf_elfsections (abfd
) = i_shdrp
;
1212 i_shdrp
[t
->shstrtab_section
] = &t
->shstrtab_hdr
;
1213 if (abfd
->symcount
> 0)
1215 i_shdrp
[t
->symtab_section
] = &t
->symtab_hdr
;
1216 i_shdrp
[t
->strtab_section
] = &t
->strtab_hdr
;
1217 t
->symtab_hdr
.sh_link
= t
->strtab_section
;
1219 for (sec
= abfd
->sections
; sec
; sec
= sec
->next
)
1221 struct bfd_elf_section_data
*d
= elf_section_data (sec
);
1225 i_shdrp
[d
->this_idx
] = &d
->this_hdr
;
1226 if (d
->rel_idx
!= 0)
1227 i_shdrp
[d
->rel_idx
] = &d
->rel_hdr
;
1229 /* Fill in the sh_link and sh_info fields while we're at it. */
1231 /* sh_link of a reloc section is the section index of the symbol
1232 table. sh_info is the section index of the section to which
1233 the relocation entries apply. */
1234 if (d
->rel_idx
!= 0)
1236 d
->rel_hdr
.sh_link
= t
->symtab_section
;
1237 d
->rel_hdr
.sh_info
= d
->this_idx
;
1240 switch (d
->this_hdr
.sh_type
)
1244 /* A reloc section which we are treating as a normal BFD
1245 section. sh_link is the section index of the symbol
1246 table. sh_info is the section index of the section to
1247 which the relocation entries apply. We assume that an
1248 allocated reloc section uses the dynamic symbol table.
1249 FIXME: How can we be sure? */
1250 s
= bfd_get_section_by_name (abfd
, ".dynsym");
1252 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
1254 /* We look up the section the relocs apply to by name. */
1256 if (d
->this_hdr
.sh_type
== SHT_REL
)
1260 s
= bfd_get_section_by_name (abfd
, name
);
1262 d
->this_hdr
.sh_info
= elf_section_data (s
)->this_idx
;
1266 /* We assume that a section named .stab*str is a stabs
1267 string section. We look for a section with the same name
1268 but without the trailing ``str'', and set its sh_link
1269 field to point to this section. */
1270 if (strncmp (sec
->name
, ".stab", sizeof ".stab" - 1) == 0
1271 && strcmp (sec
->name
+ strlen (sec
->name
) - 3, "str") == 0)
1276 len
= strlen (sec
->name
);
1277 alc
= (char *) bfd_malloc (len
- 2);
1280 strncpy (alc
, sec
->name
, len
- 3);
1281 alc
[len
- 3] = '\0';
1282 s
= bfd_get_section_by_name (abfd
, alc
);
1286 elf_section_data (s
)->this_hdr
.sh_link
= d
->this_idx
;
1288 /* This is a .stab section. */
1289 elf_section_data (s
)->this_hdr
.sh_entsize
=
1290 4 + 2 * (bed
->s
->arch_size
/ 8);
1297 /* sh_link is the section header index of the string table
1298 used for the dynamic entries or symbol table. */
1299 s
= bfd_get_section_by_name (abfd
, ".dynstr");
1301 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
1305 /* sh_link is the section header index of the symbol table
1306 this hash table is for. */
1307 s
= bfd_get_section_by_name (abfd
, ".dynsym");
1309 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
1317 /* Map symbol from it's internal number to the external number, moving
1318 all local symbols to be at the head of the list. */
1321 sym_is_global (abfd
, sym
)
1325 /* If the backend has a special mapping, use it. */
1326 if (get_elf_backend_data (abfd
)->elf_backend_sym_is_global
)
1327 return ((*get_elf_backend_data (abfd
)->elf_backend_sym_is_global
)
1330 return ((sym
->flags
& (BSF_GLOBAL
| BSF_WEAK
)) != 0
1331 || bfd_is_und_section (bfd_get_section (sym
))
1332 || bfd_is_com_section (bfd_get_section (sym
)));
1336 elf_map_symbols (abfd
)
1339 int symcount
= bfd_get_symcount (abfd
);
1340 asymbol
**syms
= bfd_get_outsymbols (abfd
);
1341 asymbol
**sect_syms
;
1343 int num_globals
= 0;
1344 int num_locals2
= 0;
1345 int num_globals2
= 0;
1347 int num_sections
= 0;
1353 fprintf (stderr
, "elf_map_symbols\n");
1357 /* Add a section symbol for each BFD section. FIXME: Is this really
1359 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
1361 if (max_index
< asect
->index
)
1362 max_index
= asect
->index
;
1366 sect_syms
= (asymbol
**) bfd_zalloc (abfd
, max_index
* sizeof (asymbol
*));
1367 if (sect_syms
== NULL
)
1369 elf_section_syms (abfd
) = sect_syms
;
1371 for (idx
= 0; idx
< symcount
; idx
++)
1373 if ((syms
[idx
]->flags
& BSF_SECTION_SYM
) != 0
1374 && (syms
[idx
]->value
+ syms
[idx
]->section
->vma
) == 0)
1378 sec
= syms
[idx
]->section
;
1379 if (sec
->owner
!= NULL
)
1381 if (sec
->owner
!= abfd
)
1383 if (sec
->output_offset
!= 0)
1385 sec
= sec
->output_section
;
1386 BFD_ASSERT (sec
->owner
== abfd
);
1388 sect_syms
[sec
->index
] = syms
[idx
];
1393 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
1397 if (sect_syms
[asect
->index
] != NULL
)
1400 sym
= bfd_make_empty_symbol (abfd
);
1403 sym
->the_bfd
= abfd
;
1404 sym
->name
= asect
->name
;
1406 /* Set the flags to 0 to indicate that this one was newly added. */
1408 sym
->section
= asect
;
1409 sect_syms
[asect
->index
] = sym
;
1413 "creating section symbol, name = %s, value = 0x%.8lx, index = %d, section = 0x%.8lx\n",
1414 asect
->name
, (long) asect
->vma
, asect
->index
, (long) asect
);
1418 /* Classify all of the symbols. */
1419 for (idx
= 0; idx
< symcount
; idx
++)
1421 if (!sym_is_global (abfd
, syms
[idx
]))
1426 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
1428 if (sect_syms
[asect
->index
] != NULL
1429 && sect_syms
[asect
->index
]->flags
== 0)
1431 sect_syms
[asect
->index
]->flags
= BSF_SECTION_SYM
;
1432 if (!sym_is_global (abfd
, sect_syms
[asect
->index
]))
1436 sect_syms
[asect
->index
]->flags
= 0;
1440 /* Now sort the symbols so the local symbols are first. */
1441 new_syms
= ((asymbol
**)
1443 (num_locals
+ num_globals
) * sizeof (asymbol
*)));
1444 if (new_syms
== NULL
)
1447 for (idx
= 0; idx
< symcount
; idx
++)
1449 asymbol
*sym
= syms
[idx
];
1452 if (!sym_is_global (abfd
, sym
))
1455 i
= num_locals
+ num_globals2
++;
1457 sym
->udata
.i
= i
+ 1;
1459 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
1461 if (sect_syms
[asect
->index
] != NULL
1462 && sect_syms
[asect
->index
]->flags
== 0)
1464 asymbol
*sym
= sect_syms
[asect
->index
];
1467 sym
->flags
= BSF_SECTION_SYM
;
1468 if (!sym_is_global (abfd
, sym
))
1471 i
= num_locals
+ num_globals2
++;
1473 sym
->udata
.i
= i
+ 1;
1477 bfd_set_symtab (abfd
, new_syms
, num_locals
+ num_globals
);
1479 elf_num_locals (abfd
) = num_locals
;
1480 elf_num_globals (abfd
) = num_globals
;
1484 /* Align to the maximum file alignment that could be required for any
1485 ELF data structure. */
1487 static INLINE file_ptr align_file_position
PARAMS ((file_ptr
, int));
1488 static INLINE file_ptr
1489 align_file_position (off
, align
)
1493 return (off
+ align
- 1) & ~(align
- 1);
1496 /* Assign a file position to a section, optionally aligning to the
1497 required section alignment. */
1500 _bfd_elf_assign_file_position_for_section (i_shdrp
, offset
, align
)
1501 Elf_Internal_Shdr
*i_shdrp
;
1509 al
= i_shdrp
->sh_addralign
;
1511 offset
= BFD_ALIGN (offset
, al
);
1513 i_shdrp
->sh_offset
= offset
;
1514 if (i_shdrp
->bfd_section
!= NULL
)
1515 i_shdrp
->bfd_section
->filepos
= offset
;
1516 if (i_shdrp
->sh_type
!= SHT_NOBITS
)
1517 offset
+= i_shdrp
->sh_size
;
1521 /* Compute the file positions we are going to put the sections at, and
1522 otherwise prepare to begin writing out the ELF file. If LINK_INFO
1523 is not NULL, this is being called by the ELF backend linker. */
1526 _bfd_elf_compute_section_file_positions (abfd
, link_info
)
1528 struct bfd_link_info
*link_info
;
1530 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
1532 struct bfd_strtab_hash
*strtab
;
1533 Elf_Internal_Shdr
*shstrtab_hdr
;
1535 if (abfd
->output_has_begun
)
1538 /* Do any elf backend specific processing first. */
1539 if (bed
->elf_backend_begin_write_processing
)
1540 (*bed
->elf_backend_begin_write_processing
) (abfd
, link_info
);
1542 if (! prep_headers (abfd
))
1546 bfd_map_over_sections (abfd
, elf_fake_sections
, &failed
);
1550 if (!assign_section_numbers (abfd
))
1553 /* The backend linker builds symbol table information itself. */
1554 if (link_info
== NULL
&& abfd
->symcount
> 0)
1556 if (! swap_out_syms (abfd
, &strtab
))
1560 shstrtab_hdr
= &elf_tdata (abfd
)->shstrtab_hdr
;
1561 /* sh_name was set in prep_headers. */
1562 shstrtab_hdr
->sh_type
= SHT_STRTAB
;
1563 shstrtab_hdr
->sh_flags
= 0;
1564 shstrtab_hdr
->sh_addr
= 0;
1565 shstrtab_hdr
->sh_size
= _bfd_stringtab_size (elf_shstrtab (abfd
));
1566 shstrtab_hdr
->sh_entsize
= 0;
1567 shstrtab_hdr
->sh_link
= 0;
1568 shstrtab_hdr
->sh_info
= 0;
1569 /* sh_offset is set in assign_file_positions_except_relocs. */
1570 shstrtab_hdr
->sh_addralign
= 1;
1572 if (!assign_file_positions_except_relocs (abfd
))
1575 if (link_info
== NULL
&& abfd
->symcount
> 0)
1578 Elf_Internal_Shdr
*hdr
;
1580 off
= elf_tdata (abfd
)->next_file_pos
;
1582 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
1583 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, true);
1585 hdr
= &elf_tdata (abfd
)->strtab_hdr
;
1586 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, true);
1588 elf_tdata (abfd
)->next_file_pos
= off
;
1590 /* Now that we know where the .strtab section goes, write it
1592 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
1593 || ! _bfd_stringtab_emit (abfd
, strtab
))
1595 _bfd_stringtab_free (strtab
);
1598 abfd
->output_has_begun
= true;
1603 /* Create a mapping from a set of sections to a program segment. */
1605 static INLINE
struct elf_segment_map
*
1606 make_mapping (abfd
, sections
, from
, to
, phdr
)
1608 asection
**sections
;
1613 struct elf_segment_map
*m
;
1617 m
= ((struct elf_segment_map
*)
1619 (sizeof (struct elf_segment_map
)
1620 + (to
- from
- 1) * sizeof (asection
*))));
1624 m
->p_type
= PT_LOAD
;
1625 for (i
= from
, hdrpp
= sections
+ from
; i
< to
; i
++, hdrpp
++)
1626 m
->sections
[i
- from
] = *hdrpp
;
1627 m
->count
= to
- from
;
1629 if (from
== 0 && phdr
)
1631 /* Include the headers in the first PT_LOAD segment. */
1632 m
->includes_filehdr
= 1;
1633 m
->includes_phdrs
= 1;
1639 /* Set up a mapping from BFD sections to program segments. */
1642 map_sections_to_segments (abfd
)
1645 asection
**sections
= NULL
;
1649 struct elf_segment_map
*mfirst
;
1650 struct elf_segment_map
**pm
;
1651 struct elf_segment_map
*m
;
1653 unsigned int phdr_index
;
1654 bfd_vma maxpagesize
;
1656 boolean phdr_in_section
= true;
1660 if (elf_tdata (abfd
)->segment_map
!= NULL
)
1663 if (bfd_count_sections (abfd
) == 0)
1666 /* Select the allocated sections, and sort them. */
1668 sections
= (asection
**) bfd_malloc (bfd_count_sections (abfd
)
1669 * sizeof (asection
*));
1670 if (sections
== NULL
)
1674 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
1676 if ((s
->flags
& SEC_ALLOC
) != 0)
1682 BFD_ASSERT (i
<= bfd_count_sections (abfd
));
1685 qsort (sections
, (size_t) count
, sizeof (asection
*), elf_sort_sections
);
1687 /* Build the mapping. */
1692 /* If we have a .interp section, then create a PT_PHDR segment for
1693 the program headers and a PT_INTERP segment for the .interp
1695 s
= bfd_get_section_by_name (abfd
, ".interp");
1696 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0)
1698 m
= ((struct elf_segment_map
*)
1699 bfd_zalloc (abfd
, sizeof (struct elf_segment_map
)));
1703 m
->p_type
= PT_PHDR
;
1704 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
1705 m
->p_flags
= PF_R
| PF_X
;
1706 m
->p_flags_valid
= 1;
1707 m
->includes_phdrs
= 1;
1712 m
= ((struct elf_segment_map
*)
1713 bfd_zalloc (abfd
, sizeof (struct elf_segment_map
)));
1717 m
->p_type
= PT_INTERP
;
1725 /* Look through the sections. We put sections in the same program
1726 segment when the start of the second section can be placed within
1727 a few bytes of the end of the first section. */
1730 maxpagesize
= get_elf_backend_data (abfd
)->maxpagesize
;
1732 dynsec
= bfd_get_section_by_name (abfd
, ".dynamic");
1734 && (dynsec
->flags
& SEC_LOAD
) == 0)
1737 /* Deal with -Ttext or something similar such that the first section
1738 is not adjacent to the program headers. This is an
1739 approximation, since at this point we don't know exactly how many
1740 program headers we will need. */
1743 bfd_size_type phdr_size
;
1745 phdr_size
= elf_tdata (abfd
)->program_header_size
;
1747 phdr_size
= get_elf_backend_data (abfd
)->s
->sizeof_phdr
;
1748 if (sections
[0]->lma
% maxpagesize
< phdr_size
% maxpagesize
)
1749 phdr_in_section
= false;
1752 for (i
= 0, hdrpp
= sections
; i
< count
; i
++, hdrpp
++)
1758 /* See if this section and the last one will fit in the same
1759 segment. Don't put a loadable section after a non-loadable
1760 section. If we are building a dynamic executable, don't put
1761 a writable section in a read only segment (we don't do this
1762 for a non-dynamic executable because some people prefer to
1763 have only one program segment; anybody can use PHDRS in their
1764 linker script to control what happens anyhow). */
1765 if (last_hdr
== NULL
1766 || ((BFD_ALIGN (last_hdr
->lma
+ last_hdr
->_raw_size
, maxpagesize
)
1768 && ((last_hdr
->flags
& SEC_LOAD
) != 0
1769 || (hdr
->flags
& SEC_LOAD
) == 0)
1772 || (hdr
->flags
& SEC_READONLY
) != 0)))
1778 /* This section won't fit in the program segment. We must
1779 create a new program header holding all the sections from
1780 phdr_index until hdr. */
1782 m
= make_mapping (abfd
, sections
, phdr_index
, i
, phdr_in_section
);
1789 if ((hdr
->flags
& SEC_READONLY
) == 0)
1794 phdr_in_section
= false;
1797 /* Create a final PT_LOAD program segment. */
1798 if (last_hdr
!= NULL
)
1800 m
= make_mapping (abfd
, sections
, phdr_index
, i
, phdr_in_section
);
1808 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
1811 m
= ((struct elf_segment_map
*)
1812 bfd_zalloc (abfd
, sizeof (struct elf_segment_map
)));
1816 m
->p_type
= PT_DYNAMIC
;
1818 m
->sections
[0] = dynsec
;
1827 elf_tdata (abfd
)->segment_map
= mfirst
;
1831 if (sections
!= NULL
)
1836 /* Sort sections by VMA. */
1839 elf_sort_sections (arg1
, arg2
)
1843 const asection
*sec1
= *(const asection
**) arg1
;
1844 const asection
*sec2
= *(const asection
**) arg2
;
1846 if (sec1
->vma
< sec2
->vma
)
1848 else if (sec1
->vma
> sec2
->vma
)
1851 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
1853 #define TOEND(x) (((x)->flags & SEC_LOAD) == 0)
1857 return sec1
->target_index
- sec2
->target_index
;
1866 /* Sort by size, to put zero sized sections before others at the
1869 if (sec1
->_raw_size
< sec2
->_raw_size
)
1871 if (sec1
->_raw_size
> sec2
->_raw_size
)
1874 return sec1
->target_index
- sec2
->target_index
;
1877 /* Assign file positions to the sections based on the mapping from
1878 sections to segments. This function also sets up some fields in
1879 the file header, and writes out the program headers. */
1882 assign_file_positions_for_segments (abfd
)
1885 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
1887 struct elf_segment_map
*m
;
1889 Elf_Internal_Phdr
*phdrs
;
1891 bfd_vma filehdr_vaddr
, filehdr_paddr
;
1892 bfd_vma phdrs_vaddr
, phdrs_paddr
;
1893 Elf_Internal_Phdr
*p
;
1895 if (elf_tdata (abfd
)->segment_map
== NULL
)
1897 if (! map_sections_to_segments (abfd
))
1901 if (bed
->elf_backend_modify_segment_map
)
1903 if (! (*bed
->elf_backend_modify_segment_map
) (abfd
))
1908 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
1911 elf_elfheader (abfd
)->e_phoff
= bed
->s
->sizeof_ehdr
;
1912 elf_elfheader (abfd
)->e_phentsize
= bed
->s
->sizeof_phdr
;
1913 elf_elfheader (abfd
)->e_phnum
= count
;
1918 /* If we already counted the number of program segments, make sure
1919 that we allocated enough space. This happens when SIZEOF_HEADERS
1920 is used in a linker script. */
1921 alloc
= elf_tdata (abfd
)->program_header_size
/ bed
->s
->sizeof_phdr
;
1922 if (alloc
!= 0 && count
> alloc
)
1924 ((*_bfd_error_handler
)
1925 ("%s: Not enough room for program headers (allocated %u, need %u)",
1926 bfd_get_filename (abfd
), alloc
, count
));
1927 bfd_set_error (bfd_error_bad_value
);
1934 phdrs
= ((Elf_Internal_Phdr
*)
1935 bfd_alloc (abfd
, alloc
* sizeof (Elf_Internal_Phdr
)));
1939 off
= bed
->s
->sizeof_ehdr
;
1940 off
+= alloc
* bed
->s
->sizeof_phdr
;
1946 for (m
= elf_tdata (abfd
)->segment_map
, p
= phdrs
;
1953 /* If elf_segment_map is not from map_sections_to_segments, the
1954 sections may not be correctly ordered. */
1956 qsort (m
->sections
, (size_t) m
->count
, sizeof (asection
*),
1959 p
->p_type
= m
->p_type
;
1961 if (m
->p_flags_valid
)
1962 p
->p_flags
= m
->p_flags
;
1966 if (p
->p_type
== PT_LOAD
1968 && (m
->sections
[0]->flags
& SEC_LOAD
) != 0)
1969 off
+= (m
->sections
[0]->vma
- off
) % bed
->maxpagesize
;
1974 p
->p_vaddr
= m
->sections
[0]->vma
;
1976 if (m
->p_paddr_valid
)
1977 p
->p_paddr
= m
->p_paddr
;
1978 else if (m
->count
== 0)
1981 p
->p_paddr
= m
->sections
[0]->lma
;
1983 if (p
->p_type
== PT_LOAD
)
1984 p
->p_align
= bed
->maxpagesize
;
1985 else if (m
->count
== 0)
1986 p
->p_align
= bed
->s
->file_align
;
1994 if (m
->includes_filehdr
)
1996 if (! m
->p_flags_valid
)
1999 p
->p_filesz
= bed
->s
->sizeof_ehdr
;
2000 p
->p_memsz
= bed
->s
->sizeof_ehdr
;
2003 BFD_ASSERT (p
->p_type
== PT_LOAD
);
2005 if (! m
->p_paddr_valid
)
2008 if (p
->p_type
== PT_LOAD
)
2010 filehdr_vaddr
= p
->p_vaddr
;
2011 filehdr_paddr
= p
->p_paddr
;
2015 if (m
->includes_phdrs
)
2017 if (! m
->p_flags_valid
)
2019 if (m
->includes_filehdr
)
2021 if (p
->p_type
== PT_LOAD
)
2023 phdrs_vaddr
= p
->p_vaddr
+ bed
->s
->sizeof_ehdr
;
2024 phdrs_paddr
= p
->p_paddr
+ bed
->s
->sizeof_ehdr
;
2029 p
->p_offset
= bed
->s
->sizeof_ehdr
;
2032 BFD_ASSERT (p
->p_type
== PT_LOAD
);
2033 p
->p_vaddr
-= off
- p
->p_offset
;
2034 if (! m
->p_paddr_valid
)
2035 p
->p_paddr
-= off
- p
->p_offset
;
2037 if (p
->p_type
== PT_LOAD
)
2039 phdrs_vaddr
= p
->p_vaddr
;
2040 phdrs_paddr
= p
->p_paddr
;
2043 p
->p_filesz
+= alloc
* bed
->s
->sizeof_phdr
;
2044 p
->p_memsz
+= alloc
* bed
->s
->sizeof_phdr
;
2047 if (p
->p_type
== PT_LOAD
)
2049 if (! m
->includes_filehdr
&& ! m
->includes_phdrs
)
2055 adjust
= off
- (p
->p_offset
+ p
->p_filesz
);
2056 p
->p_filesz
+= adjust
;
2057 p
->p_memsz
+= adjust
;
2061 for (i
= 0, secpp
= m
->sections
; i
< m
->count
; i
++, secpp
++)
2065 bfd_size_type align
;
2070 if (p
->p_type
== PT_LOAD
)
2074 /* The section VMA must equal the file position modulo
2076 if ((flags
& SEC_ALLOC
) != 0)
2078 adjust
= (sec
->vma
- off
) % bed
->maxpagesize
;
2083 p
->p_memsz
+= adjust
;
2085 if ((flags
& SEC_LOAD
) != 0)
2086 p
->p_filesz
+= adjust
;
2092 if ((flags
& SEC_LOAD
) != 0)
2093 off
+= sec
->_raw_size
;
2096 p
->p_memsz
+= sec
->_raw_size
;
2098 if ((flags
& SEC_LOAD
) != 0)
2099 p
->p_filesz
+= sec
->_raw_size
;
2101 align
= 1 << bfd_get_section_alignment (abfd
, sec
);
2102 if (align
> p
->p_align
)
2105 if (! m
->p_flags_valid
)
2108 if ((flags
& SEC_CODE
) != 0)
2110 if ((flags
& SEC_READONLY
) == 0)
2116 /* Now that we have set the section file positions, we can set up
2117 the file positions for the non PT_LOAD segments. */
2118 for (m
= elf_tdata (abfd
)->segment_map
, p
= phdrs
;
2122 if (p
->p_type
!= PT_LOAD
&& m
->count
> 0)
2124 BFD_ASSERT (! m
->includes_filehdr
&& ! m
->includes_phdrs
);
2125 p
->p_offset
= m
->sections
[0]->filepos
;
2129 if (m
->includes_filehdr
)
2131 p
->p_vaddr
= filehdr_vaddr
;
2132 if (! m
->p_paddr_valid
)
2133 p
->p_paddr
= filehdr_paddr
;
2135 else if (m
->includes_phdrs
)
2137 p
->p_vaddr
= phdrs_vaddr
;
2138 if (! m
->p_paddr_valid
)
2139 p
->p_paddr
= phdrs_paddr
;
2144 /* Clear out any program headers we allocated but did not use. */
2145 for (; count
< alloc
; count
++, p
++)
2147 memset (p
, 0, sizeof *p
);
2148 p
->p_type
= PT_NULL
;
2151 elf_tdata (abfd
)->phdr
= phdrs
;
2153 elf_tdata (abfd
)->next_file_pos
= off
;
2155 /* Write out the program headers. */
2156 if (bfd_seek (abfd
, bed
->s
->sizeof_ehdr
, SEEK_SET
) != 0
2157 || bed
->s
->write_out_phdrs (abfd
, phdrs
, alloc
) != 0)
2163 /* Get the size of the program header.
2165 If this is called by the linker before any of the section VMA's are set, it
2166 can't calculate the correct value for a strange memory layout. This only
2167 happens when SIZEOF_HEADERS is used in a linker script. In this case,
2168 SORTED_HDRS is NULL and we assume the normal scenario of one text and one
2169 data segment (exclusive of .interp and .dynamic).
2171 ??? User written scripts must either not use SIZEOF_HEADERS, or assume there
2172 will be two segments. */
2174 static bfd_size_type
2175 get_program_header_size (abfd
)
2180 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2182 /* We can't return a different result each time we're called. */
2183 if (elf_tdata (abfd
)->program_header_size
!= 0)
2184 return elf_tdata (abfd
)->program_header_size
;
2186 if (elf_tdata (abfd
)->segment_map
!= NULL
)
2188 struct elf_segment_map
*m
;
2191 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
2193 elf_tdata (abfd
)->program_header_size
= segs
* bed
->s
->sizeof_phdr
;
2194 return elf_tdata (abfd
)->program_header_size
;
2197 /* Assume we will need exactly two PT_LOAD segments: one for text
2198 and one for data. */
2201 s
= bfd_get_section_by_name (abfd
, ".interp");
2202 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0)
2204 /* If we have a loadable interpreter section, we need a
2205 PT_INTERP segment. In this case, assume we also need a
2206 PT_PHDR segment, although that may not be true for all
2211 if (bfd_get_section_by_name (abfd
, ".dynamic") != NULL
)
2213 /* We need a PT_DYNAMIC segment. */
2217 /* Let the backend count up any program headers it might need. */
2218 if (bed
->elf_backend_additional_program_headers
)
2222 a
= (*bed
->elf_backend_additional_program_headers
) (abfd
);
2228 elf_tdata (abfd
)->program_header_size
= segs
* bed
->s
->sizeof_phdr
;
2229 return elf_tdata (abfd
)->program_header_size
;
2232 /* Work out the file positions of all the sections. This is called by
2233 _bfd_elf_compute_section_file_positions. All the section sizes and
2234 VMAs must be known before this is called.
2236 We do not consider reloc sections at this point, unless they form
2237 part of the loadable image. Reloc sections are assigned file
2238 positions in assign_file_positions_for_relocs, which is called by
2239 write_object_contents and final_link.
2241 We also don't set the positions of the .symtab and .strtab here. */
2244 assign_file_positions_except_relocs (abfd
)
2247 struct elf_obj_tdata
* const tdata
= elf_tdata (abfd
);
2248 Elf_Internal_Ehdr
* const i_ehdrp
= elf_elfheader (abfd
);
2249 Elf_Internal_Shdr
** const i_shdrpp
= elf_elfsections (abfd
);
2251 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2253 if ((abfd
->flags
& (EXEC_P
| DYNAMIC
)) == 0)
2255 Elf_Internal_Shdr
**hdrpp
;
2258 /* Start after the ELF header. */
2259 off
= i_ehdrp
->e_ehsize
;
2261 /* We are not creating an executable, which means that we are
2262 not creating a program header, and that the actual order of
2263 the sections in the file is unimportant. */
2264 for (i
= 1, hdrpp
= i_shdrpp
+ 1; i
< i_ehdrp
->e_shnum
; i
++, hdrpp
++)
2266 Elf_Internal_Shdr
*hdr
;
2269 if (hdr
->sh_type
== SHT_REL
|| hdr
->sh_type
== SHT_RELA
)
2271 hdr
->sh_offset
= -1;
2274 if (i
== tdata
->symtab_section
2275 || i
== tdata
->strtab_section
)
2277 hdr
->sh_offset
= -1;
2281 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, true);
2287 Elf_Internal_Shdr
**hdrpp
;
2289 /* Assign file positions for the loaded sections based on the
2290 assignment of sections to segments. */
2291 if (! assign_file_positions_for_segments (abfd
))
2294 /* Assign file positions for the other sections. */
2296 off
= elf_tdata (abfd
)->next_file_pos
;
2297 for (i
= 1, hdrpp
= i_shdrpp
+ 1; i
< i_ehdrp
->e_shnum
; i
++, hdrpp
++)
2299 Elf_Internal_Shdr
*hdr
;
2302 if (hdr
->bfd_section
!= NULL
2303 && hdr
->bfd_section
->filepos
!= 0)
2304 hdr
->sh_offset
= hdr
->bfd_section
->filepos
;
2305 else if ((hdr
->sh_flags
& SHF_ALLOC
) != 0)
2307 ((*_bfd_error_handler
)
2308 ("%s: warning: allocated section `%s' not in segment",
2309 bfd_get_filename (abfd
),
2310 (hdr
->bfd_section
== NULL
2312 : hdr
->bfd_section
->name
)));
2313 off
+= (hdr
->sh_addr
- off
) % bed
->maxpagesize
;
2314 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
,
2317 else if (hdr
->sh_type
== SHT_REL
2318 || hdr
->sh_type
== SHT_RELA
2319 || hdr
== i_shdrpp
[tdata
->symtab_section
]
2320 || hdr
== i_shdrpp
[tdata
->strtab_section
])
2321 hdr
->sh_offset
= -1;
2323 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, true);
2327 /* Place the section headers. */
2328 off
= align_file_position (off
, bed
->s
->file_align
);
2329 i_ehdrp
->e_shoff
= off
;
2330 off
+= i_ehdrp
->e_shnum
* i_ehdrp
->e_shentsize
;
2332 elf_tdata (abfd
)->next_file_pos
= off
;
2341 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
2342 Elf_Internal_Phdr
*i_phdrp
= 0; /* Program header table, internal form */
2343 Elf_Internal_Shdr
**i_shdrp
; /* Section header table, internal form */
2345 struct bfd_strtab_hash
*shstrtab
;
2346 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2348 i_ehdrp
= elf_elfheader (abfd
);
2349 i_shdrp
= elf_elfsections (abfd
);
2351 shstrtab
= _bfd_elf_stringtab_init ();
2352 if (shstrtab
== NULL
)
2355 elf_shstrtab (abfd
) = shstrtab
;
2357 i_ehdrp
->e_ident
[EI_MAG0
] = ELFMAG0
;
2358 i_ehdrp
->e_ident
[EI_MAG1
] = ELFMAG1
;
2359 i_ehdrp
->e_ident
[EI_MAG2
] = ELFMAG2
;
2360 i_ehdrp
->e_ident
[EI_MAG3
] = ELFMAG3
;
2362 i_ehdrp
->e_ident
[EI_CLASS
] = bed
->s
->elfclass
;
2363 i_ehdrp
->e_ident
[EI_DATA
] =
2364 bfd_big_endian (abfd
) ? ELFDATA2MSB
: ELFDATA2LSB
;
2365 i_ehdrp
->e_ident
[EI_VERSION
] = bed
->s
->ev_current
;
2367 for (count
= EI_PAD
; count
< EI_NIDENT
; count
++)
2368 i_ehdrp
->e_ident
[count
] = 0;
2370 if ((abfd
->flags
& DYNAMIC
) != 0)
2371 i_ehdrp
->e_type
= ET_DYN
;
2372 else if ((abfd
->flags
& EXEC_P
) != 0)
2373 i_ehdrp
->e_type
= ET_EXEC
;
2375 i_ehdrp
->e_type
= ET_REL
;
2377 switch (bfd_get_arch (abfd
))
2379 case bfd_arch_unknown
:
2380 i_ehdrp
->e_machine
= EM_NONE
;
2382 case bfd_arch_sparc
:
2383 if (bed
->s
->arch_size
== 64)
2384 i_ehdrp
->e_machine
= EM_SPARC64
;
2386 i_ehdrp
->e_machine
= EM_SPARC
;
2389 i_ehdrp
->e_machine
= EM_386
;
2392 i_ehdrp
->e_machine
= EM_68K
;
2395 i_ehdrp
->e_machine
= EM_88K
;
2398 i_ehdrp
->e_machine
= EM_860
;
2400 case bfd_arch_mips
: /* MIPS Rxxxx */
2401 i_ehdrp
->e_machine
= EM_MIPS
; /* only MIPS R3000 */
2404 i_ehdrp
->e_machine
= EM_PARISC
;
2406 case bfd_arch_powerpc
:
2407 i_ehdrp
->e_machine
= EM_PPC
;
2409 /* start-sanitize-arc */
2411 i_ehdrp
->e_machine
= EM_CYGNUS_ARC
;
2413 /* end-sanitize-arc */
2414 /* also note that EM_M32, AT&T WE32100 is unknown to bfd */
2416 i_ehdrp
->e_machine
= EM_NONE
;
2418 i_ehdrp
->e_version
= bed
->s
->ev_current
;
2419 i_ehdrp
->e_ehsize
= bed
->s
->sizeof_ehdr
;
2421 /* no program header, for now. */
2422 i_ehdrp
->e_phoff
= 0;
2423 i_ehdrp
->e_phentsize
= 0;
2424 i_ehdrp
->e_phnum
= 0;
2426 /* each bfd section is section header entry */
2427 i_ehdrp
->e_entry
= bfd_get_start_address (abfd
);
2428 i_ehdrp
->e_shentsize
= bed
->s
->sizeof_shdr
;
2430 /* if we're building an executable, we'll need a program header table */
2431 if (abfd
->flags
& EXEC_P
)
2433 /* it all happens later */
2435 i_ehdrp
->e_phentsize
= sizeof (Elf_External_Phdr
);
2437 /* elf_build_phdrs() returns a (NULL-terminated) array of
2438 Elf_Internal_Phdrs */
2439 i_phdrp
= elf_build_phdrs (abfd
, i_ehdrp
, i_shdrp
, &i_ehdrp
->e_phnum
);
2440 i_ehdrp
->e_phoff
= outbase
;
2441 outbase
+= i_ehdrp
->e_phentsize
* i_ehdrp
->e_phnum
;
2446 i_ehdrp
->e_phentsize
= 0;
2448 i_ehdrp
->e_phoff
= 0;
2451 elf_tdata (abfd
)->symtab_hdr
.sh_name
=
2452 (unsigned int) _bfd_stringtab_add (shstrtab
, ".symtab", true, false);
2453 elf_tdata (abfd
)->strtab_hdr
.sh_name
=
2454 (unsigned int) _bfd_stringtab_add (shstrtab
, ".strtab", true, false);
2455 elf_tdata (abfd
)->shstrtab_hdr
.sh_name
=
2456 (unsigned int) _bfd_stringtab_add (shstrtab
, ".shstrtab", true, false);
2457 if (elf_tdata (abfd
)->symtab_hdr
.sh_name
== (unsigned int) -1
2458 || elf_tdata (abfd
)->symtab_hdr
.sh_name
== (unsigned int) -1
2459 || elf_tdata (abfd
)->shstrtab_hdr
.sh_name
== (unsigned int) -1)
2465 /* Assign file positions for all the reloc sections which are not part
2466 of the loadable file image. */
2469 _bfd_elf_assign_file_positions_for_relocs (abfd
)
2474 Elf_Internal_Shdr
**shdrpp
;
2476 off
= elf_tdata (abfd
)->next_file_pos
;
2478 for (i
= 1, shdrpp
= elf_elfsections (abfd
) + 1;
2479 i
< elf_elfheader (abfd
)->e_shnum
;
2482 Elf_Internal_Shdr
*shdrp
;
2485 if ((shdrp
->sh_type
== SHT_REL
|| shdrp
->sh_type
== SHT_RELA
)
2486 && shdrp
->sh_offset
== -1)
2487 off
= _bfd_elf_assign_file_position_for_section (shdrp
, off
, true);
2490 elf_tdata (abfd
)->next_file_pos
= off
;
2494 _bfd_elf_write_object_contents (abfd
)
2497 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2498 Elf_Internal_Ehdr
*i_ehdrp
;
2499 Elf_Internal_Shdr
**i_shdrp
;
2503 if (! abfd
->output_has_begun
2504 && ! _bfd_elf_compute_section_file_positions (abfd
,
2505 (struct bfd_link_info
*) NULL
))
2508 i_shdrp
= elf_elfsections (abfd
);
2509 i_ehdrp
= elf_elfheader (abfd
);
2512 bfd_map_over_sections (abfd
, bed
->s
->write_relocs
, &failed
);
2515 _bfd_elf_assign_file_positions_for_relocs (abfd
);
2517 /* After writing the headers, we need to write the sections too... */
2518 for (count
= 1; count
< i_ehdrp
->e_shnum
; count
++)
2520 if (bed
->elf_backend_section_processing
)
2521 (*bed
->elf_backend_section_processing
) (abfd
, i_shdrp
[count
]);
2522 if (i_shdrp
[count
]->contents
)
2524 if (bfd_seek (abfd
, i_shdrp
[count
]->sh_offset
, SEEK_SET
) != 0
2525 || (bfd_write (i_shdrp
[count
]->contents
, i_shdrp
[count
]->sh_size
,
2527 != i_shdrp
[count
]->sh_size
))
2532 /* Write out the section header names. */
2533 if (bfd_seek (abfd
, elf_tdata (abfd
)->shstrtab_hdr
.sh_offset
, SEEK_SET
) != 0
2534 || ! _bfd_stringtab_emit (abfd
, elf_shstrtab (abfd
)))
2537 if (bed
->elf_backend_final_write_processing
)
2538 (*bed
->elf_backend_final_write_processing
) (abfd
,
2539 elf_tdata (abfd
)->linker
);
2541 return bed
->s
->write_shdrs_and_ehdr (abfd
);
2544 /* given a section, search the header to find them... */
2546 _bfd_elf_section_from_bfd_section (abfd
, asect
)
2550 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2551 Elf_Internal_Shdr
**i_shdrp
= elf_elfsections (abfd
);
2553 Elf_Internal_Shdr
*hdr
;
2554 int maxindex
= elf_elfheader (abfd
)->e_shnum
;
2556 for (index
= 0; index
< maxindex
; index
++)
2558 hdr
= i_shdrp
[index
];
2559 if (hdr
->bfd_section
== asect
)
2563 if (bed
->elf_backend_section_from_bfd_section
)
2565 for (index
= 0; index
< maxindex
; index
++)
2569 hdr
= i_shdrp
[index
];
2571 if ((*bed
->elf_backend_section_from_bfd_section
)
2572 (abfd
, hdr
, asect
, &retval
))
2577 if (bfd_is_abs_section (asect
))
2579 if (bfd_is_com_section (asect
))
2581 if (bfd_is_und_section (asect
))
2587 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
2591 _bfd_elf_symbol_from_bfd_symbol (abfd
, asym_ptr_ptr
)
2593 asymbol
**asym_ptr_ptr
;
2595 asymbol
*asym_ptr
= *asym_ptr_ptr
;
2597 flagword flags
= asym_ptr
->flags
;
2599 /* When gas creates relocations against local labels, it creates its
2600 own symbol for the section, but does put the symbol into the
2601 symbol chain, so udata is 0. When the linker is generating
2602 relocatable output, this section symbol may be for one of the
2603 input sections rather than the output section. */
2604 if (asym_ptr
->udata
.i
== 0
2605 && (flags
& BSF_SECTION_SYM
)
2606 && asym_ptr
->section
)
2610 if (asym_ptr
->section
->output_section
!= NULL
)
2611 indx
= asym_ptr
->section
->output_section
->index
;
2613 indx
= asym_ptr
->section
->index
;
2614 if (elf_section_syms (abfd
)[indx
])
2615 asym_ptr
->udata
.i
= elf_section_syms (abfd
)[indx
]->udata
.i
;
2618 idx
= asym_ptr
->udata
.i
;
2622 /* This case can occur when using --strip-symbol on a symbol
2623 which is used in a relocation entry. */
2624 (*_bfd_error_handler
)
2625 ("%s: symbol `%s' required but not present",
2626 bfd_get_filename (abfd
), bfd_asymbol_name (asym_ptr
));
2627 bfd_set_error (bfd_error_no_symbols
);
2634 "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n",
2635 (long) asym_ptr
, asym_ptr
->name
, idx
, flags
,
2636 elf_symbol_flags (flags
));
2644 /* Copy private BFD data. This copies any program header information. */
2647 copy_private_bfd_data (ibfd
, obfd
)
2651 Elf_Internal_Ehdr
*iehdr
;
2652 struct elf_segment_map
*mfirst
;
2653 struct elf_segment_map
**pm
;
2654 Elf_Internal_Phdr
*p
;
2657 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
2658 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
2661 if (elf_tdata (ibfd
)->phdr
== NULL
)
2664 iehdr
= elf_elfheader (ibfd
);
2669 c
= elf_elfheader (ibfd
)->e_phnum
;
2670 for (i
= 0, p
= elf_tdata (ibfd
)->phdr
; i
< c
; i
++, p
++)
2674 struct elf_segment_map
*m
;
2679 /* The complicated case when p_vaddr is 0 is to handle the
2680 Solaris linker, which generates a PT_INTERP section with
2681 p_vaddr and p_memsz set to 0. */
2682 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
2683 if (((s
->vma
>= p
->p_vaddr
2684 && (s
->vma
+ s
->_raw_size
<= p
->p_vaddr
+ p
->p_memsz
2685 || s
->vma
+ s
->_raw_size
<= p
->p_vaddr
+ p
->p_filesz
))
2688 && (s
->flags
& SEC_HAS_CONTENTS
) != 0
2689 && (bfd_vma
) s
->filepos
>= p
->p_offset
2690 && ((bfd_vma
) s
->filepos
+ s
->_raw_size
2691 <= p
->p_offset
+ p
->p_filesz
)))
2692 && (s
->flags
& SEC_ALLOC
) != 0
2693 && s
->output_section
!= NULL
)
2696 m
= ((struct elf_segment_map
*)
2698 (sizeof (struct elf_segment_map
)
2699 + (csecs
- 1) * sizeof (asection
*))));
2704 m
->p_type
= p
->p_type
;
2705 m
->p_flags
= p
->p_flags
;
2706 m
->p_flags_valid
= 1;
2707 m
->p_paddr
= p
->p_paddr
;
2708 m
->p_paddr_valid
= 1;
2710 m
->includes_filehdr
= (p
->p_offset
== 0
2711 && p
->p_filesz
>= iehdr
->e_ehsize
);
2713 m
->includes_phdrs
= (p
->p_offset
<= (bfd_vma
) iehdr
->e_phoff
2714 && (p
->p_offset
+ p
->p_filesz
2715 >= ((bfd_vma
) iehdr
->e_phoff
2716 + iehdr
->e_phnum
* iehdr
->e_phentsize
)));
2719 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
2721 if (((s
->vma
>= p
->p_vaddr
2722 && (s
->vma
+ s
->_raw_size
<= p
->p_vaddr
+ p
->p_memsz
2723 || s
->vma
+ s
->_raw_size
<= p
->p_vaddr
+ p
->p_filesz
))
2726 && (s
->flags
& SEC_HAS_CONTENTS
) != 0
2727 && (bfd_vma
) s
->filepos
>= p
->p_offset
2728 && ((bfd_vma
) s
->filepos
+ s
->_raw_size
2729 <= p
->p_offset
+ p
->p_filesz
)))
2730 && (s
->flags
& SEC_ALLOC
) != 0
2731 && s
->output_section
!= NULL
)
2733 m
->sections
[isec
] = s
->output_section
;
2737 BFD_ASSERT (isec
== csecs
);
2744 elf_tdata (obfd
)->segment_map
= mfirst
;
2749 /* Copy private section information. This copies over the entsize
2750 field, and sometimes the info field. */
2753 _bfd_elf_copy_private_section_data (ibfd
, isec
, obfd
, osec
)
2759 Elf_Internal_Shdr
*ihdr
, *ohdr
;
2761 if (ibfd
->xvec
->flavour
!= bfd_target_elf_flavour
2762 || obfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
2765 /* Copy over private BFD data if it has not already been copied.
2766 This must be done here, rather than in the copy_private_bfd_data
2767 entry point, because the latter is called after the section
2768 contents have been set, which means that the program headers have
2769 already been worked out. */
2770 if (elf_tdata (obfd
)->segment_map
== NULL
2771 && elf_tdata (ibfd
)->phdr
!= NULL
)
2775 /* Only set up the segments when all the sections have been set
2777 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
2778 if (s
->output_section
== NULL
)
2782 if (! copy_private_bfd_data (ibfd
, obfd
))
2787 ihdr
= &elf_section_data (isec
)->this_hdr
;
2788 ohdr
= &elf_section_data (osec
)->this_hdr
;
2790 ohdr
->sh_entsize
= ihdr
->sh_entsize
;
2792 if (ihdr
->sh_type
== SHT_SYMTAB
2793 || ihdr
->sh_type
== SHT_DYNSYM
)
2794 ohdr
->sh_info
= ihdr
->sh_info
;
2799 /* Copy private symbol information. If this symbol is in a section
2800 which we did not map into a BFD section, try to map the section
2801 index correctly. We use special macro definitions for the mapped
2802 section indices; these definitions are interpreted by the
2803 swap_out_syms function. */
2805 #define MAP_ONESYMTAB (SHN_LORESERVE - 1)
2806 #define MAP_DYNSYMTAB (SHN_LORESERVE - 2)
2807 #define MAP_STRTAB (SHN_LORESERVE - 3)
2808 #define MAP_SHSTRTAB (SHN_LORESERVE - 4)
2811 _bfd_elf_copy_private_symbol_data (ibfd
, isymarg
, obfd
, osymarg
)
2817 elf_symbol_type
*isym
, *osym
;
2819 isym
= elf_symbol_from (ibfd
, isymarg
);
2820 osym
= elf_symbol_from (obfd
, osymarg
);
2824 && bfd_is_abs_section (isym
->symbol
.section
))
2828 shndx
= isym
->internal_elf_sym
.st_shndx
;
2829 if (shndx
== elf_onesymtab (ibfd
))
2830 shndx
= MAP_ONESYMTAB
;
2831 else if (shndx
== elf_dynsymtab (ibfd
))
2832 shndx
= MAP_DYNSYMTAB
;
2833 else if (shndx
== elf_tdata (ibfd
)->strtab_section
)
2835 else if (shndx
== elf_tdata (ibfd
)->shstrtab_section
)
2836 shndx
= MAP_SHSTRTAB
;
2837 osym
->internal_elf_sym
.st_shndx
= shndx
;
2843 /* Swap out the symbols. */
2846 swap_out_syms (abfd
, sttp
)
2848 struct bfd_strtab_hash
**sttp
;
2850 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2852 if (!elf_map_symbols (abfd
))
2855 /* Dump out the symtabs. */
2857 int symcount
= bfd_get_symcount (abfd
);
2858 asymbol
**syms
= bfd_get_outsymbols (abfd
);
2859 struct bfd_strtab_hash
*stt
;
2860 Elf_Internal_Shdr
*symtab_hdr
;
2861 Elf_Internal_Shdr
*symstrtab_hdr
;
2862 char *outbound_syms
;
2865 stt
= _bfd_elf_stringtab_init ();
2869 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2870 symtab_hdr
->sh_type
= SHT_SYMTAB
;
2871 symtab_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
2872 symtab_hdr
->sh_size
= symtab_hdr
->sh_entsize
* (symcount
+ 1);
2873 symtab_hdr
->sh_info
= elf_num_locals (abfd
) + 1;
2874 symtab_hdr
->sh_addralign
= bed
->s
->file_align
;
2876 symstrtab_hdr
= &elf_tdata (abfd
)->strtab_hdr
;
2877 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
2879 outbound_syms
= bfd_alloc (abfd
,
2880 (1 + symcount
) * bed
->s
->sizeof_sym
);
2881 if (outbound_syms
== NULL
)
2883 symtab_hdr
->contents
= (PTR
) outbound_syms
;
2885 /* now generate the data (for "contents") */
2887 /* Fill in zeroth symbol and swap it out. */
2888 Elf_Internal_Sym sym
;
2894 sym
.st_shndx
= SHN_UNDEF
;
2895 bed
->s
->swap_symbol_out (abfd
, &sym
, (PTR
) outbound_syms
);
2896 outbound_syms
+= bed
->s
->sizeof_sym
;
2898 for (idx
= 0; idx
< symcount
; idx
++)
2900 Elf_Internal_Sym sym
;
2901 bfd_vma value
= syms
[idx
]->value
;
2902 elf_symbol_type
*type_ptr
;
2903 flagword flags
= syms
[idx
]->flags
;
2906 if (flags
& BSF_SECTION_SYM
)
2907 /* Section symbols have no names. */
2911 sym
.st_name
= (unsigned long) _bfd_stringtab_add (stt
,
2914 if (sym
.st_name
== (unsigned long) -1)
2918 type_ptr
= elf_symbol_from (abfd
, syms
[idx
]);
2920 if (bfd_is_com_section (syms
[idx
]->section
))
2922 /* ELF common symbols put the alignment into the `value' field,
2923 and the size into the `size' field. This is backwards from
2924 how BFD handles it, so reverse it here. */
2925 sym
.st_size
= value
;
2926 if (type_ptr
== NULL
2927 || type_ptr
->internal_elf_sym
.st_value
== 0)
2928 sym
.st_value
= value
>= 16 ? 16 : (1 << bfd_log2 (value
));
2930 sym
.st_value
= type_ptr
->internal_elf_sym
.st_value
;
2931 sym
.st_shndx
= _bfd_elf_section_from_bfd_section (abfd
,
2932 syms
[idx
]->section
);
2936 asection
*sec
= syms
[idx
]->section
;
2939 if (sec
->output_section
)
2941 value
+= sec
->output_offset
;
2942 sec
= sec
->output_section
;
2945 sym
.st_value
= value
;
2946 sym
.st_size
= type_ptr
? type_ptr
->internal_elf_sym
.st_size
: 0;
2948 if (bfd_is_abs_section (sec
)
2950 && type_ptr
->internal_elf_sym
.st_shndx
!= 0)
2952 /* This symbol is in a real ELF section which we did
2953 not create as a BFD section. Undo the mapping done
2954 by copy_private_symbol_data. */
2955 shndx
= type_ptr
->internal_elf_sym
.st_shndx
;
2959 shndx
= elf_onesymtab (abfd
);
2962 shndx
= elf_dynsymtab (abfd
);
2965 shndx
= elf_tdata (abfd
)->strtab_section
;
2968 shndx
= elf_tdata (abfd
)->shstrtab_section
;
2976 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec
);
2982 /* Writing this would be a hell of a lot easier if
2983 we had some decent documentation on bfd, and
2984 knew what to expect of the library, and what to
2985 demand of applications. For example, it
2986 appears that `objcopy' might not set the
2987 section of a symbol to be a section that is
2988 actually in the output file. */
2989 sec2
= bfd_get_section_by_name (abfd
, sec
->name
);
2990 BFD_ASSERT (sec2
!= 0);
2991 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec2
);
2992 BFD_ASSERT (shndx
!= -1);
2996 sym
.st_shndx
= shndx
;
2999 if ((flags
& BSF_FUNCTION
) != 0)
3001 else if ((flags
& BSF_OBJECT
) != 0)
3006 if (bfd_is_com_section (syms
[idx
]->section
))
3007 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, type
);
3008 else if (bfd_is_und_section (syms
[idx
]->section
))
3009 sym
.st_info
= ELF_ST_INFO (((flags
& BSF_WEAK
)
3013 else if (flags
& BSF_SECTION_SYM
)
3014 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_SECTION
);
3015 else if (flags
& BSF_FILE
)
3016 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FILE
);
3019 int bind
= STB_LOCAL
;
3021 if (flags
& BSF_LOCAL
)
3023 else if (flags
& BSF_WEAK
)
3025 else if (flags
& BSF_GLOBAL
)
3028 sym
.st_info
= ELF_ST_INFO (bind
, type
);
3032 bed
->s
->swap_symbol_out (abfd
, &sym
, (PTR
) outbound_syms
);
3033 outbound_syms
+= bed
->s
->sizeof_sym
;
3037 symstrtab_hdr
->sh_size
= _bfd_stringtab_size (stt
);
3038 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
3040 symstrtab_hdr
->sh_flags
= 0;
3041 symstrtab_hdr
->sh_addr
= 0;
3042 symstrtab_hdr
->sh_entsize
= 0;
3043 symstrtab_hdr
->sh_link
= 0;
3044 symstrtab_hdr
->sh_info
= 0;
3045 symstrtab_hdr
->sh_addralign
= 1;
3051 /* Return the number of bytes required to hold the symtab vector.
3053 Note that we base it on the count plus 1, since we will null terminate
3054 the vector allocated based on this size. However, the ELF symbol table
3055 always has a dummy entry as symbol #0, so it ends up even. */
3058 _bfd_elf_get_symtab_upper_bound (abfd
)
3063 Elf_Internal_Shdr
*hdr
= &elf_tdata (abfd
)->symtab_hdr
;
3065 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
3066 symtab_size
= (symcount
- 1 + 1) * (sizeof (asymbol
*));
3072 _bfd_elf_get_dynamic_symtab_upper_bound (abfd
)
3077 Elf_Internal_Shdr
*hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
3079 if (elf_dynsymtab (abfd
) == 0)
3081 bfd_set_error (bfd_error_invalid_operation
);
3085 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
3086 symtab_size
= (symcount
- 1 + 1) * (sizeof (asymbol
*));
3092 _bfd_elf_get_reloc_upper_bound (abfd
, asect
)
3096 return (asect
->reloc_count
+ 1) * sizeof (arelent
*);
3099 /* Canonicalize the relocs. */
3102 _bfd_elf_canonicalize_reloc (abfd
, section
, relptr
, symbols
)
3111 if (! get_elf_backend_data (abfd
)->s
->slurp_reloc_table (abfd
, section
, symbols
))
3114 tblptr
= section
->relocation
;
3115 for (i
= 0; i
< section
->reloc_count
; i
++)
3116 *relptr
++ = tblptr
++;
3120 return section
->reloc_count
;
3124 _bfd_elf_get_symtab (abfd
, alocation
)
3126 asymbol
**alocation
;
3128 long symcount
= get_elf_backend_data (abfd
)->s
->slurp_symbol_table (abfd
, alocation
, false);
3131 bfd_get_symcount (abfd
) = symcount
;
3136 _bfd_elf_canonicalize_dynamic_symtab (abfd
, alocation
)
3138 asymbol
**alocation
;
3140 return get_elf_backend_data (abfd
)->s
->slurp_symbol_table (abfd
, alocation
, true);
3144 _bfd_elf_make_empty_symbol (abfd
)
3147 elf_symbol_type
*newsym
;
3149 newsym
= (elf_symbol_type
*) bfd_zalloc (abfd
, sizeof (elf_symbol_type
));
3154 newsym
->symbol
.the_bfd
= abfd
;
3155 return &newsym
->symbol
;
3160 _bfd_elf_get_symbol_info (ignore_abfd
, symbol
, ret
)
3165 bfd_symbol_info (symbol
, ret
);
3169 _bfd_elf_get_lineno (ignore_abfd
, symbol
)
3178 _bfd_elf_set_arch_mach (abfd
, arch
, machine
)
3180 enum bfd_architecture arch
;
3181 unsigned long machine
;
3183 /* If this isn't the right architecture for this backend, and this
3184 isn't the generic backend, fail. */
3185 if (arch
!= get_elf_backend_data (abfd
)->arch
3186 && arch
!= bfd_arch_unknown
3187 && get_elf_backend_data (abfd
)->arch
!= bfd_arch_unknown
)
3190 return bfd_default_set_arch_mach (abfd
, arch
, machine
);
3193 /* Find the nearest line to a particular section and offset, for error
3197 _bfd_elf_find_nearest_line (abfd
,
3208 CONST
char **filename_ptr
;
3209 CONST
char **functionname_ptr
;
3210 unsigned int *line_ptr
;
3213 const char *filename
;
3218 if (! _bfd_stab_section_find_nearest_line (abfd
, symbols
, section
, offset
,
3219 &found
, filename_ptr
,
3220 functionname_ptr
, line_ptr
,
3221 &elf_tdata (abfd
)->line_info
))
3226 if (symbols
== NULL
)
3233 for (p
= symbols
; *p
!= NULL
; p
++)
3237 q
= (elf_symbol_type
*) *p
;
3239 if (bfd_get_section (&q
->symbol
) != section
)
3242 switch (ELF_ST_TYPE (q
->internal_elf_sym
.st_info
))
3247 filename
= bfd_asymbol_name (&q
->symbol
);
3250 if (q
->symbol
.section
== section
3251 && q
->symbol
.value
>= low_func
3252 && q
->symbol
.value
<= offset
)
3254 func
= (asymbol
*) q
;
3255 low_func
= q
->symbol
.value
;
3264 *filename_ptr
= filename
;
3265 *functionname_ptr
= bfd_asymbol_name (func
);
3271 _bfd_elf_sizeof_headers (abfd
, reloc
)
3277 ret
= get_elf_backend_data (abfd
)->s
->sizeof_ehdr
;
3279 ret
+= get_program_header_size (abfd
);
3284 _bfd_elf_set_section_contents (abfd
, section
, location
, offset
, count
)
3289 bfd_size_type count
;
3291 Elf_Internal_Shdr
*hdr
;
3293 if (! abfd
->output_has_begun
3294 && ! _bfd_elf_compute_section_file_positions (abfd
,
3295 (struct bfd_link_info
*) NULL
))
3298 hdr
= &elf_section_data (section
)->this_hdr
;
3300 if (bfd_seek (abfd
, hdr
->sh_offset
+ offset
, SEEK_SET
) == -1)
3302 if (bfd_write (location
, 1, count
, abfd
) != count
)
3309 _bfd_elf_no_info_to_howto (abfd
, cache_ptr
, dst
)
3312 Elf_Internal_Rela
*dst
;
3319 _bfd_elf_no_info_to_howto_rel (abfd
, cache_ptr
, dst
)
3322 Elf_Internal_Rel
*dst
;
3328 /* Try to convert a non-ELF reloc into an ELF one. */
3331 _bfd_elf_validate_reloc (abfd
, areloc
)
3335 /* Check whether we really have an ELF howto. */
3337 if ((*areloc
->sym_ptr_ptr
)->the_bfd
->xvec
!= abfd
->xvec
)
3339 bfd_reloc_code_real_type code
;
3340 reloc_howto_type
*howto
;
3342 /* Alien reloc: Try to determine its type to replace it with an
3343 equivalent ELF reloc. */
3345 if (areloc
->howto
->pc_relative
)
3347 switch (areloc
->howto
->bitsize
)
3350 code
= BFD_RELOC_8_PCREL
;
3353 code
= BFD_RELOC_12_PCREL
;
3356 code
= BFD_RELOC_16_PCREL
;
3359 code
= BFD_RELOC_24_PCREL
;
3362 code
= BFD_RELOC_32_PCREL
;
3365 code
= BFD_RELOC_64_PCREL
;
3371 howto
= bfd_reloc_type_lookup (abfd
, code
);
3373 if (areloc
->howto
->pcrel_offset
!= howto
->pcrel_offset
)
3375 if (howto
->pcrel_offset
)
3376 areloc
->addend
+= areloc
->address
;
3378 areloc
->addend
-= areloc
->address
; /* addend is unsigned!! */
3383 switch (areloc
->howto
->bitsize
)
3389 code
= BFD_RELOC_14
;
3392 code
= BFD_RELOC_16
;
3395 code
= BFD_RELOC_26
;
3398 code
= BFD_RELOC_32
;
3401 code
= BFD_RELOC_64
;
3407 howto
= bfd_reloc_type_lookup (abfd
, code
);
3411 areloc
->howto
= howto
;
3419 (*_bfd_error_handler
)
3420 ("%s: unsupported relocation type %s",
3421 bfd_get_filename (abfd
), areloc
->howto
->name
);
3422 bfd_set_error (bfd_error_bad_value
);