1 /* ELF executable support for BFD.
3 Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
4 2002, 2003, 2004 Free Software Foundation, Inc.
6 This file is part of BFD, the Binary File Descriptor library.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
30 BFD support for ELF formats is being worked on.
31 Currently, the best supported back ends are for sparc and i386
32 (running svr4 or Solaris 2).
34 Documentation of the internals of the support code still needs
35 to be written. The code is changing quickly enough that we
36 haven't bothered yet. */
38 /* For sparc64-cross-sparc32. */
46 #include "libiberty.h"
48 static int elf_sort_sections (const void *, const void *);
49 static bfd_boolean assign_file_positions_except_relocs (bfd *, struct bfd_link_info *);
50 static bfd_boolean prep_headers (bfd *);
51 static bfd_boolean swap_out_syms (bfd *, struct bfd_strtab_hash **, int) ;
52 static bfd_boolean elfcore_read_notes (bfd *, file_ptr, bfd_size_type) ;
54 /* Swap version information in and out. The version information is
55 currently size independent. If that ever changes, this code will
56 need to move into elfcode.h. */
58 /* Swap in a Verdef structure. */
61 _bfd_elf_swap_verdef_in (bfd *abfd,
62 const Elf_External_Verdef *src,
63 Elf_Internal_Verdef *dst)
65 dst->vd_version = H_GET_16 (abfd, src->vd_version);
66 dst->vd_flags = H_GET_16 (abfd, src->vd_flags);
67 dst->vd_ndx = H_GET_16 (abfd, src->vd_ndx);
68 dst->vd_cnt = H_GET_16 (abfd, src->vd_cnt);
69 dst->vd_hash = H_GET_32 (abfd, src->vd_hash);
70 dst->vd_aux = H_GET_32 (abfd, src->vd_aux);
71 dst->vd_next = H_GET_32 (abfd, src->vd_next);
74 /* Swap out a Verdef structure. */
77 _bfd_elf_swap_verdef_out (bfd *abfd,
78 const Elf_Internal_Verdef *src,
79 Elf_External_Verdef *dst)
81 H_PUT_16 (abfd, src->vd_version, dst->vd_version);
82 H_PUT_16 (abfd, src->vd_flags, dst->vd_flags);
83 H_PUT_16 (abfd, src->vd_ndx, dst->vd_ndx);
84 H_PUT_16 (abfd, src->vd_cnt, dst->vd_cnt);
85 H_PUT_32 (abfd, src->vd_hash, dst->vd_hash);
86 H_PUT_32 (abfd, src->vd_aux, dst->vd_aux);
87 H_PUT_32 (abfd, src->vd_next, dst->vd_next);
90 /* Swap in a Verdaux structure. */
93 _bfd_elf_swap_verdaux_in (bfd *abfd,
94 const Elf_External_Verdaux *src,
95 Elf_Internal_Verdaux *dst)
97 dst->vda_name = H_GET_32 (abfd, src->vda_name);
98 dst->vda_next = H_GET_32 (abfd, src->vda_next);
101 /* Swap out a Verdaux structure. */
104 _bfd_elf_swap_verdaux_out (bfd *abfd,
105 const Elf_Internal_Verdaux *src,
106 Elf_External_Verdaux *dst)
108 H_PUT_32 (abfd, src->vda_name, dst->vda_name);
109 H_PUT_32 (abfd, src->vda_next, dst->vda_next);
112 /* Swap in a Verneed structure. */
115 _bfd_elf_swap_verneed_in (bfd *abfd,
116 const Elf_External_Verneed *src,
117 Elf_Internal_Verneed *dst)
119 dst->vn_version = H_GET_16 (abfd, src->vn_version);
120 dst->vn_cnt = H_GET_16 (abfd, src->vn_cnt);
121 dst->vn_file = H_GET_32 (abfd, src->vn_file);
122 dst->vn_aux = H_GET_32 (abfd, src->vn_aux);
123 dst->vn_next = H_GET_32 (abfd, src->vn_next);
126 /* Swap out a Verneed structure. */
129 _bfd_elf_swap_verneed_out (bfd *abfd,
130 const Elf_Internal_Verneed *src,
131 Elf_External_Verneed *dst)
133 H_PUT_16 (abfd, src->vn_version, dst->vn_version);
134 H_PUT_16 (abfd, src->vn_cnt, dst->vn_cnt);
135 H_PUT_32 (abfd, src->vn_file, dst->vn_file);
136 H_PUT_32 (abfd, src->vn_aux, dst->vn_aux);
137 H_PUT_32 (abfd, src->vn_next, dst->vn_next);
140 /* Swap in a Vernaux structure. */
143 _bfd_elf_swap_vernaux_in (bfd *abfd,
144 const Elf_External_Vernaux *src,
145 Elf_Internal_Vernaux *dst)
147 dst->vna_hash = H_GET_32 (abfd, src->vna_hash);
148 dst->vna_flags = H_GET_16 (abfd, src->vna_flags);
149 dst->vna_other = H_GET_16 (abfd, src->vna_other);
150 dst->vna_name = H_GET_32 (abfd, src->vna_name);
151 dst->vna_next = H_GET_32 (abfd, src->vna_next);
154 /* Swap out a Vernaux structure. */
157 _bfd_elf_swap_vernaux_out (bfd *abfd,
158 const Elf_Internal_Vernaux *src,
159 Elf_External_Vernaux *dst)
161 H_PUT_32 (abfd, src->vna_hash, dst->vna_hash);
162 H_PUT_16 (abfd, src->vna_flags, dst->vna_flags);
163 H_PUT_16 (abfd, src->vna_other, dst->vna_other);
164 H_PUT_32 (abfd, src->vna_name, dst->vna_name);
165 H_PUT_32 (abfd, src->vna_next, dst->vna_next);
168 /* Swap in a Versym structure. */
171 _bfd_elf_swap_versym_in (bfd *abfd,
172 const Elf_External_Versym *src,
173 Elf_Internal_Versym *dst)
175 dst->vs_vers = H_GET_16 (abfd, src->vs_vers);
178 /* Swap out a Versym structure. */
181 _bfd_elf_swap_versym_out (bfd *abfd,
182 const Elf_Internal_Versym *src,
183 Elf_External_Versym *dst)
185 H_PUT_16 (abfd, src->vs_vers, dst->vs_vers);
188 /* Standard ELF hash function. Do not change this function; you will
189 cause invalid hash tables to be generated. */
192 bfd_elf_hash (const char *namearg)
194 const unsigned char *name = (const unsigned char *) namearg;
199 while ((ch = *name++) != '\0')
202 if ((g = (h & 0xf0000000)) != 0)
205 /* The ELF ABI says `h &= ~g', but this is equivalent in
206 this case and on some machines one insn instead of two. */
210 return h & 0xffffffff;
213 /* Read a specified number of bytes at a specified offset in an ELF
214 file, into a newly allocated buffer, and return a pointer to the
218 elf_read (bfd *abfd, file_ptr offset, bfd_size_type size)
222 if ((buf = bfd_alloc (abfd, size)) == NULL)
224 if (bfd_seek (abfd, offset, SEEK_SET) != 0)
226 if (bfd_bread (buf, size, abfd) != size)
228 if (bfd_get_error () != bfd_error_system_call)
229 bfd_set_error (bfd_error_file_truncated);
236 bfd_elf_mkobject (bfd *abfd)
238 /* This just does initialization. */
239 /* coff_mkobject zalloc's space for tdata.coff_obj_data ... */
240 elf_tdata (abfd) = bfd_zalloc (abfd, sizeof (struct elf_obj_tdata));
241 if (elf_tdata (abfd) == 0)
243 /* Since everything is done at close time, do we need any
250 bfd_elf_mkcorefile (bfd *abfd)
252 /* I think this can be done just like an object file. */
253 return bfd_elf_mkobject (abfd);
257 bfd_elf_get_str_section (bfd *abfd, unsigned int shindex)
259 Elf_Internal_Shdr **i_shdrp;
260 char *shstrtab = NULL;
262 bfd_size_type shstrtabsize;
264 i_shdrp = elf_elfsections (abfd);
265 if (i_shdrp == 0 || i_shdrp[shindex] == 0)
268 shstrtab = (char *) i_shdrp[shindex]->contents;
269 if (shstrtab == NULL)
271 /* No cached one, attempt to read, and cache what we read. */
272 offset = i_shdrp[shindex]->sh_offset;
273 shstrtabsize = i_shdrp[shindex]->sh_size;
274 shstrtab = elf_read (abfd, offset, shstrtabsize);
275 i_shdrp[shindex]->contents = shstrtab;
281 bfd_elf_string_from_elf_section (bfd *abfd,
282 unsigned int shindex,
283 unsigned int strindex)
285 Elf_Internal_Shdr *hdr;
290 hdr = elf_elfsections (abfd)[shindex];
292 if (hdr->contents == NULL
293 && bfd_elf_get_str_section (abfd, shindex) == NULL)
296 if (strindex >= hdr->sh_size)
298 (*_bfd_error_handler)
299 (_("%s: invalid string offset %u >= %lu for section `%s'"),
300 bfd_archive_filename (abfd), strindex, (unsigned long) hdr->sh_size,
301 ((shindex == elf_elfheader(abfd)->e_shstrndx
302 && strindex == hdr->sh_name)
304 : elf_string_from_elf_strtab (abfd, hdr->sh_name)));
308 return ((char *) hdr->contents) + strindex;
311 /* Read and convert symbols to internal format.
312 SYMCOUNT specifies the number of symbols to read, starting from
313 symbol SYMOFFSET. If any of INTSYM_BUF, EXTSYM_BUF or EXTSHNDX_BUF
314 are non-NULL, they are used to store the internal symbols, external
315 symbols, and symbol section index extensions, respectively. */
318 bfd_elf_get_elf_syms (bfd *ibfd,
319 Elf_Internal_Shdr *symtab_hdr,
322 Elf_Internal_Sym *intsym_buf,
324 Elf_External_Sym_Shndx *extshndx_buf)
326 Elf_Internal_Shdr *shndx_hdr;
328 const bfd_byte *esym;
329 Elf_External_Sym_Shndx *alloc_extshndx;
330 Elf_External_Sym_Shndx *shndx;
331 Elf_Internal_Sym *isym;
332 Elf_Internal_Sym *isymend;
333 const struct elf_backend_data *bed;
341 /* Normal syms might have section extension entries. */
343 if (symtab_hdr == &elf_tdata (ibfd)->symtab_hdr)
344 shndx_hdr = &elf_tdata (ibfd)->symtab_shndx_hdr;
346 /* Read the symbols. */
348 alloc_extshndx = NULL;
349 bed = get_elf_backend_data (ibfd);
350 extsym_size = bed->s->sizeof_sym;
351 amt = symcount * extsym_size;
352 pos = symtab_hdr->sh_offset + symoffset * extsym_size;
353 if (extsym_buf == NULL)
355 alloc_ext = bfd_malloc (amt);
356 extsym_buf = alloc_ext;
358 if (extsym_buf == NULL
359 || bfd_seek (ibfd, pos, SEEK_SET) != 0
360 || bfd_bread (extsym_buf, amt, ibfd) != amt)
366 if (shndx_hdr == NULL || shndx_hdr->sh_size == 0)
370 amt = symcount * sizeof (Elf_External_Sym_Shndx);
371 pos = shndx_hdr->sh_offset + symoffset * sizeof (Elf_External_Sym_Shndx);
372 if (extshndx_buf == NULL)
374 alloc_extshndx = bfd_malloc (amt);
375 extshndx_buf = alloc_extshndx;
377 if (extshndx_buf == NULL
378 || bfd_seek (ibfd, pos, SEEK_SET) != 0
379 || bfd_bread (extshndx_buf, amt, ibfd) != amt)
386 if (intsym_buf == NULL)
388 bfd_size_type amt = symcount * sizeof (Elf_Internal_Sym);
389 intsym_buf = bfd_malloc (amt);
390 if (intsym_buf == NULL)
394 /* Convert the symbols to internal form. */
395 isymend = intsym_buf + symcount;
396 for (esym = extsym_buf, isym = intsym_buf, shndx = extshndx_buf;
398 esym += extsym_size, isym++, shndx = shndx != NULL ? shndx + 1 : NULL)
399 (*bed->s->swap_symbol_in) (ibfd, esym, shndx, isym);
402 if (alloc_ext != NULL)
404 if (alloc_extshndx != NULL)
405 free (alloc_extshndx);
410 /* Look up a symbol name. */
412 bfd_elf_local_sym_name (bfd *abfd, Elf_Internal_Sym *isym)
414 unsigned int iname = isym->st_name;
415 unsigned int shindex = elf_tdata (abfd)->symtab_hdr.sh_link;
416 if (iname == 0 && ELF_ST_TYPE (isym->st_info) == STT_SECTION)
418 iname = elf_elfsections (abfd)[isym->st_shndx]->sh_name;
419 shindex = elf_elfheader (abfd)->e_shstrndx;
422 return bfd_elf_string_from_elf_section (abfd, shindex, iname);
425 /* Elf_Internal_Shdr->contents is an array of these for SHT_GROUP
426 sections. The first element is the flags, the rest are section
429 typedef union elf_internal_group {
430 Elf_Internal_Shdr *shdr;
432 } Elf_Internal_Group;
434 /* Return the name of the group signature symbol. Why isn't the
435 signature just a string? */
438 group_signature (bfd *abfd, Elf_Internal_Shdr *ghdr)
440 Elf_Internal_Shdr *hdr;
441 unsigned char esym[sizeof (Elf64_External_Sym)];
442 Elf_External_Sym_Shndx eshndx;
443 Elf_Internal_Sym isym;
445 /* First we need to ensure the symbol table is available. */
446 if (! bfd_section_from_shdr (abfd, ghdr->sh_link))
449 /* Go read the symbol. */
450 hdr = &elf_tdata (abfd)->symtab_hdr;
451 if (bfd_elf_get_elf_syms (abfd, hdr, 1, ghdr->sh_info,
452 &isym, esym, &eshndx) == NULL)
455 return bfd_elf_local_sym_name (abfd, &isym);
458 /* Set next_in_group list pointer, and group name for NEWSECT. */
461 setup_group (bfd *abfd, Elf_Internal_Shdr *hdr, asection *newsect)
463 unsigned int num_group = elf_tdata (abfd)->num_group;
465 /* If num_group is zero, read in all SHT_GROUP sections. The count
466 is set to -1 if there are no SHT_GROUP sections. */
469 unsigned int i, shnum;
471 /* First count the number of groups. If we have a SHT_GROUP
472 section with just a flag word (ie. sh_size is 4), ignore it. */
473 shnum = elf_numsections (abfd);
475 for (i = 0; i < shnum; i++)
477 Elf_Internal_Shdr *shdr = elf_elfsections (abfd)[i];
478 if (shdr->sh_type == SHT_GROUP && shdr->sh_size >= 8)
483 num_group = (unsigned) -1;
484 elf_tdata (abfd)->num_group = num_group;
488 /* We keep a list of elf section headers for group sections,
489 so we can find them quickly. */
490 bfd_size_type amt = num_group * sizeof (Elf_Internal_Shdr *);
491 elf_tdata (abfd)->group_sect_ptr = bfd_alloc (abfd, amt);
492 if (elf_tdata (abfd)->group_sect_ptr == NULL)
496 for (i = 0; i < shnum; i++)
498 Elf_Internal_Shdr *shdr = elf_elfsections (abfd)[i];
499 if (shdr->sh_type == SHT_GROUP && shdr->sh_size >= 8)
502 Elf_Internal_Group *dest;
504 /* Add to list of sections. */
505 elf_tdata (abfd)->group_sect_ptr[num_group] = shdr;
508 /* Read the raw contents. */
509 BFD_ASSERT (sizeof (*dest) >= 4);
510 amt = shdr->sh_size * sizeof (*dest) / 4;
511 shdr->contents = bfd_alloc (abfd, amt);
512 if (shdr->contents == NULL
513 || bfd_seek (abfd, shdr->sh_offset, SEEK_SET) != 0
514 || (bfd_bread (shdr->contents, shdr->sh_size, abfd)
518 /* Translate raw contents, a flag word followed by an
519 array of elf section indices all in target byte order,
520 to the flag word followed by an array of elf section
522 src = shdr->contents + shdr->sh_size;
523 dest = (Elf_Internal_Group *) (shdr->contents + amt);
530 idx = H_GET_32 (abfd, src);
531 if (src == shdr->contents)
534 if (shdr->bfd_section != NULL && (idx & GRP_COMDAT))
535 shdr->bfd_section->flags
536 |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
541 ((*_bfd_error_handler)
542 (_("%s: invalid SHT_GROUP entry"),
543 bfd_archive_filename (abfd)));
546 dest->shdr = elf_elfsections (abfd)[idx];
553 if (num_group != (unsigned) -1)
557 for (i = 0; i < num_group; i++)
559 Elf_Internal_Shdr *shdr = elf_tdata (abfd)->group_sect_ptr[i];
560 Elf_Internal_Group *idx = (Elf_Internal_Group *) shdr->contents;
561 unsigned int n_elt = shdr->sh_size / 4;
563 /* Look through this group's sections to see if current
564 section is a member. */
566 if ((++idx)->shdr == hdr)
570 /* We are a member of this group. Go looking through
571 other members to see if any others are linked via
573 idx = (Elf_Internal_Group *) shdr->contents;
574 n_elt = shdr->sh_size / 4;
576 if ((s = (++idx)->shdr->bfd_section) != NULL
577 && elf_next_in_group (s) != NULL)
581 /* Snarf the group name from other member, and
582 insert current section in circular list. */
583 elf_group_name (newsect) = elf_group_name (s);
584 elf_next_in_group (newsect) = elf_next_in_group (s);
585 elf_next_in_group (s) = newsect;
591 gname = group_signature (abfd, shdr);
594 elf_group_name (newsect) = gname;
596 /* Start a circular list with one element. */
597 elf_next_in_group (newsect) = newsect;
600 /* If the group section has been created, point to the
602 if (shdr->bfd_section != NULL)
603 elf_next_in_group (shdr->bfd_section) = newsect;
611 if (elf_group_name (newsect) == NULL)
613 (*_bfd_error_handler) (_("%s: no group info for section %s"),
614 bfd_archive_filename (abfd), newsect->name);
620 bfd_elf_discard_group (bfd *abfd ATTRIBUTE_UNUSED, asection *group)
622 asection *first = elf_next_in_group (group);
627 s->output_section = bfd_abs_section_ptr;
628 s = elf_next_in_group (s);
629 /* These lists are circular. */
636 /* Make a BFD section from an ELF section. We store a pointer to the
637 BFD section in the bfd_section field of the header. */
640 _bfd_elf_make_section_from_shdr (bfd *abfd,
641 Elf_Internal_Shdr *hdr,
646 const struct elf_backend_data *bed;
648 if (hdr->bfd_section != NULL)
650 BFD_ASSERT (strcmp (name,
651 bfd_get_section_name (abfd, hdr->bfd_section)) == 0);
655 newsect = bfd_make_section_anyway (abfd, name);
659 /* Always use the real type/flags. */
660 elf_section_type (newsect) = hdr->sh_type;
661 elf_section_flags (newsect) = hdr->sh_flags;
663 newsect->filepos = hdr->sh_offset;
665 if (! bfd_set_section_vma (abfd, newsect, hdr->sh_addr)
666 || ! bfd_set_section_size (abfd, newsect, hdr->sh_size)
667 || ! bfd_set_section_alignment (abfd, newsect,
668 bfd_log2 ((bfd_vma) hdr->sh_addralign)))
671 flags = SEC_NO_FLAGS;
672 if (hdr->sh_type != SHT_NOBITS)
673 flags |= SEC_HAS_CONTENTS;
674 if (hdr->sh_type == SHT_GROUP)
675 flags |= SEC_GROUP | SEC_EXCLUDE;
676 if ((hdr->sh_flags & SHF_ALLOC) != 0)
679 if (hdr->sh_type != SHT_NOBITS)
682 if ((hdr->sh_flags & SHF_WRITE) == 0)
683 flags |= SEC_READONLY;
684 if ((hdr->sh_flags & SHF_EXECINSTR) != 0)
686 else if ((flags & SEC_LOAD) != 0)
688 if ((hdr->sh_flags & SHF_MERGE) != 0)
691 newsect->entsize = hdr->sh_entsize;
692 if ((hdr->sh_flags & SHF_STRINGS) != 0)
693 flags |= SEC_STRINGS;
695 if (hdr->sh_flags & SHF_GROUP)
696 if (!setup_group (abfd, hdr, newsect))
698 if ((hdr->sh_flags & SHF_TLS) != 0)
699 flags |= SEC_THREAD_LOCAL;
701 /* The debugging sections appear to be recognized only by name, not
704 static const char *debug_sec_names [] =
713 for (i = ARRAY_SIZE (debug_sec_names); i--;)
714 if (strncmp (name, debug_sec_names[i], strlen (debug_sec_names[i])) == 0)
718 flags |= SEC_DEBUGGING;
721 /* As a GNU extension, if the name begins with .gnu.linkonce, we
722 only link a single copy of the section. This is used to support
723 g++. g++ will emit each template expansion in its own section.
724 The symbols will be defined as weak, so that multiple definitions
725 are permitted. The GNU linker extension is to actually discard
726 all but one of the sections. */
727 if (strncmp (name, ".gnu.linkonce", sizeof ".gnu.linkonce" - 1) == 0
728 && elf_next_in_group (newsect) == NULL)
729 flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
731 bed = get_elf_backend_data (abfd);
732 if (bed->elf_backend_section_flags)
733 if (! bed->elf_backend_section_flags (&flags, hdr))
736 if (! bfd_set_section_flags (abfd, newsect, flags))
739 if ((flags & SEC_ALLOC) != 0)
741 Elf_Internal_Phdr *phdr;
744 /* Look through the phdrs to see if we need to adjust the lma.
745 If all the p_paddr fields are zero, we ignore them, since
746 some ELF linkers produce such output. */
747 phdr = elf_tdata (abfd)->phdr;
748 for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
750 if (phdr->p_paddr != 0)
753 if (i < elf_elfheader (abfd)->e_phnum)
755 phdr = elf_tdata (abfd)->phdr;
756 for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
758 /* This section is part of this segment if its file
759 offset plus size lies within the segment's memory
760 span and, if the section is loaded, the extent of the
761 loaded data lies within the extent of the segment.
763 Note - we used to check the p_paddr field as well, and
764 refuse to set the LMA if it was 0. This is wrong
765 though, as a perfectly valid initialised segment can
766 have a p_paddr of zero. Some architectures, eg ARM,
767 place special significance on the address 0 and
768 executables need to be able to have a segment which
769 covers this address. */
770 if (phdr->p_type == PT_LOAD
771 && (bfd_vma) hdr->sh_offset >= phdr->p_offset
772 && (hdr->sh_offset + hdr->sh_size
773 <= phdr->p_offset + phdr->p_memsz)
774 && ((flags & SEC_LOAD) == 0
775 || (hdr->sh_offset + hdr->sh_size
776 <= phdr->p_offset + phdr->p_filesz)))
778 if ((flags & SEC_LOAD) == 0)
779 newsect->lma = (phdr->p_paddr
780 + hdr->sh_addr - phdr->p_vaddr);
782 /* We used to use the same adjustment for SEC_LOAD
783 sections, but that doesn't work if the segment
784 is packed with code from multiple VMAs.
785 Instead we calculate the section LMA based on
786 the segment LMA. It is assumed that the
787 segment will contain sections with contiguous
788 LMAs, even if the VMAs are not. */
789 newsect->lma = (phdr->p_paddr
790 + hdr->sh_offset - phdr->p_offset);
792 /* With contiguous segments, we can't tell from file
793 offsets whether a section with zero size should
794 be placed at the end of one segment or the
795 beginning of the next. Decide based on vaddr. */
796 if (hdr->sh_addr >= phdr->p_vaddr
797 && (hdr->sh_addr + hdr->sh_size
798 <= phdr->p_vaddr + phdr->p_memsz))
805 hdr->bfd_section = newsect;
806 elf_section_data (newsect)->this_hdr = *hdr;
816 struct elf_internal_shdr *bfd_elf_find_section (bfd *abfd, char *name);
819 Helper functions for GDB to locate the string tables.
820 Since BFD hides string tables from callers, GDB needs to use an
821 internal hook to find them. Sun's .stabstr, in particular,
822 isn't even pointed to by the .stab section, so ordinary
823 mechanisms wouldn't work to find it, even if we had some.
826 struct elf_internal_shdr *
827 bfd_elf_find_section (bfd *abfd, char *name)
829 Elf_Internal_Shdr **i_shdrp;
834 i_shdrp = elf_elfsections (abfd);
837 shstrtab = bfd_elf_get_str_section (abfd,
838 elf_elfheader (abfd)->e_shstrndx);
839 if (shstrtab != NULL)
841 max = elf_numsections (abfd);
842 for (i = 1; i < max; i++)
843 if (!strcmp (&shstrtab[i_shdrp[i]->sh_name], name))
850 const char *const bfd_elf_section_type_names[] = {
851 "SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB",
852 "SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE",
853 "SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM",
856 /* ELF relocs are against symbols. If we are producing relocatable
857 output, and the reloc is against an external symbol, and nothing
858 has given us any additional addend, the resulting reloc will also
859 be against the same symbol. In such a case, we don't want to
860 change anything about the way the reloc is handled, since it will
861 all be done at final link time. Rather than put special case code
862 into bfd_perform_relocation, all the reloc types use this howto
863 function. It just short circuits the reloc if producing
864 relocatable output against an external symbol. */
866 bfd_reloc_status_type
867 bfd_elf_generic_reloc (bfd *abfd ATTRIBUTE_UNUSED,
868 arelent *reloc_entry,
870 void *data ATTRIBUTE_UNUSED,
871 asection *input_section,
873 char **error_message ATTRIBUTE_UNUSED)
875 if (output_bfd != NULL
876 && (symbol->flags & BSF_SECTION_SYM) == 0
877 && (! reloc_entry->howto->partial_inplace
878 || reloc_entry->addend == 0))
880 reloc_entry->address += input_section->output_offset;
884 return bfd_reloc_continue;
887 /* Make sure sec_info_type is cleared if sec_info is cleared too. */
890 merge_sections_remove_hook (bfd *abfd ATTRIBUTE_UNUSED,
893 BFD_ASSERT (sec->sec_info_type == ELF_INFO_TYPE_MERGE);
894 sec->sec_info_type = ELF_INFO_TYPE_NONE;
897 /* Finish SHF_MERGE section merging. */
900 _bfd_elf_merge_sections (bfd *abfd, struct bfd_link_info *info)
902 if (!is_elf_hash_table (info->hash))
904 if (elf_hash_table (info)->merge_info)
905 _bfd_merge_sections (abfd, elf_hash_table (info)->merge_info,
906 merge_sections_remove_hook);
911 _bfd_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
913 sec->output_section = bfd_abs_section_ptr;
914 sec->output_offset = sec->vma;
915 if (!is_elf_hash_table (info->hash))
918 sec->sec_info_type = ELF_INFO_TYPE_JUST_SYMS;
921 /* Copy the program header and other data from one object module to
925 _bfd_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
927 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
928 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
931 BFD_ASSERT (!elf_flags_init (obfd)
932 || (elf_elfheader (obfd)->e_flags
933 == elf_elfheader (ibfd)->e_flags));
935 elf_gp (obfd) = elf_gp (ibfd);
936 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
937 elf_flags_init (obfd) = TRUE;
941 /* Print out the program headers. */
944 _bfd_elf_print_private_bfd_data (bfd *abfd, void *farg)
947 Elf_Internal_Phdr *p;
949 bfd_byte *dynbuf = NULL;
951 p = elf_tdata (abfd)->phdr;
956 fprintf (f, _("\nProgram Header:\n"));
957 c = elf_elfheader (abfd)->e_phnum;
958 for (i = 0; i < c; i++, p++)
965 case PT_NULL: pt = "NULL"; break;
966 case PT_LOAD: pt = "LOAD"; break;
967 case PT_DYNAMIC: pt = "DYNAMIC"; break;
968 case PT_INTERP: pt = "INTERP"; break;
969 case PT_NOTE: pt = "NOTE"; break;
970 case PT_SHLIB: pt = "SHLIB"; break;
971 case PT_PHDR: pt = "PHDR"; break;
972 case PT_TLS: pt = "TLS"; break;
973 case PT_GNU_EH_FRAME: pt = "EH_FRAME"; break;
974 case PT_GNU_STACK: pt = "STACK"; break;
975 default: sprintf (buf, "0x%lx", p->p_type); pt = buf; break;
977 fprintf (f, "%8s off 0x", pt);
978 bfd_fprintf_vma (abfd, f, p->p_offset);
979 fprintf (f, " vaddr 0x");
980 bfd_fprintf_vma (abfd, f, p->p_vaddr);
981 fprintf (f, " paddr 0x");
982 bfd_fprintf_vma (abfd, f, p->p_paddr);
983 fprintf (f, " align 2**%u\n", bfd_log2 (p->p_align));
984 fprintf (f, " filesz 0x");
985 bfd_fprintf_vma (abfd, f, p->p_filesz);
986 fprintf (f, " memsz 0x");
987 bfd_fprintf_vma (abfd, f, p->p_memsz);
988 fprintf (f, " flags %c%c%c",
989 (p->p_flags & PF_R) != 0 ? 'r' : '-',
990 (p->p_flags & PF_W) != 0 ? 'w' : '-',
991 (p->p_flags & PF_X) != 0 ? 'x' : '-');
992 if ((p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X)) != 0)
993 fprintf (f, " %lx", p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X));
998 s = bfd_get_section_by_name (abfd, ".dynamic");
1002 unsigned long shlink;
1003 bfd_byte *extdyn, *extdynend;
1005 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
1007 fprintf (f, _("\nDynamic Section:\n"));
1009 dynbuf = bfd_malloc (s->_raw_size);
1012 if (! bfd_get_section_contents (abfd, s, dynbuf, 0, s->_raw_size))
1015 elfsec = _bfd_elf_section_from_bfd_section (abfd, s);
1018 shlink = elf_elfsections (abfd)[elfsec]->sh_link;
1020 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
1021 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
1024 extdynend = extdyn + s->_raw_size;
1025 for (; extdyn < extdynend; extdyn += extdynsize)
1027 Elf_Internal_Dyn dyn;
1030 bfd_boolean stringp;
1032 (*swap_dyn_in) (abfd, extdyn, &dyn);
1034 if (dyn.d_tag == DT_NULL)
1041 sprintf (ab, "0x%lx", (unsigned long) dyn.d_tag);
1045 case DT_NEEDED: name = "NEEDED"; stringp = TRUE; break;
1046 case DT_PLTRELSZ: name = "PLTRELSZ"; break;
1047 case DT_PLTGOT: name = "PLTGOT"; break;
1048 case DT_HASH: name = "HASH"; break;
1049 case DT_STRTAB: name = "STRTAB"; break;
1050 case DT_SYMTAB: name = "SYMTAB"; break;
1051 case DT_RELA: name = "RELA"; break;
1052 case DT_RELASZ: name = "RELASZ"; break;
1053 case DT_RELAENT: name = "RELAENT"; break;
1054 case DT_STRSZ: name = "STRSZ"; break;
1055 case DT_SYMENT: name = "SYMENT"; break;
1056 case DT_INIT: name = "INIT"; break;
1057 case DT_FINI: name = "FINI"; break;
1058 case DT_SONAME: name = "SONAME"; stringp = TRUE; break;
1059 case DT_RPATH: name = "RPATH"; stringp = TRUE; break;
1060 case DT_SYMBOLIC: name = "SYMBOLIC"; break;
1061 case DT_REL: name = "REL"; break;
1062 case DT_RELSZ: name = "RELSZ"; break;
1063 case DT_RELENT: name = "RELENT"; break;
1064 case DT_PLTREL: name = "PLTREL"; break;
1065 case DT_DEBUG: name = "DEBUG"; break;
1066 case DT_TEXTREL: name = "TEXTREL"; break;
1067 case DT_JMPREL: name = "JMPREL"; break;
1068 case DT_BIND_NOW: name = "BIND_NOW"; break;
1069 case DT_INIT_ARRAY: name = "INIT_ARRAY"; break;
1070 case DT_FINI_ARRAY: name = "FINI_ARRAY"; break;
1071 case DT_INIT_ARRAYSZ: name = "INIT_ARRAYSZ"; break;
1072 case DT_FINI_ARRAYSZ: name = "FINI_ARRAYSZ"; break;
1073 case DT_RUNPATH: name = "RUNPATH"; stringp = TRUE; break;
1074 case DT_FLAGS: name = "FLAGS"; break;
1075 case DT_PREINIT_ARRAY: name = "PREINIT_ARRAY"; break;
1076 case DT_PREINIT_ARRAYSZ: name = "PREINIT_ARRAYSZ"; break;
1077 case DT_CHECKSUM: name = "CHECKSUM"; break;
1078 case DT_PLTPADSZ: name = "PLTPADSZ"; break;
1079 case DT_MOVEENT: name = "MOVEENT"; break;
1080 case DT_MOVESZ: name = "MOVESZ"; break;
1081 case DT_FEATURE: name = "FEATURE"; break;
1082 case DT_POSFLAG_1: name = "POSFLAG_1"; break;
1083 case DT_SYMINSZ: name = "SYMINSZ"; break;
1084 case DT_SYMINENT: name = "SYMINENT"; break;
1085 case DT_CONFIG: name = "CONFIG"; stringp = TRUE; break;
1086 case DT_DEPAUDIT: name = "DEPAUDIT"; stringp = TRUE; break;
1087 case DT_AUDIT: name = "AUDIT"; stringp = TRUE; break;
1088 case DT_PLTPAD: name = "PLTPAD"; break;
1089 case DT_MOVETAB: name = "MOVETAB"; break;
1090 case DT_SYMINFO: name = "SYMINFO"; break;
1091 case DT_RELACOUNT: name = "RELACOUNT"; break;
1092 case DT_RELCOUNT: name = "RELCOUNT"; break;
1093 case DT_FLAGS_1: name = "FLAGS_1"; break;
1094 case DT_VERSYM: name = "VERSYM"; break;
1095 case DT_VERDEF: name = "VERDEF"; break;
1096 case DT_VERDEFNUM: name = "VERDEFNUM"; break;
1097 case DT_VERNEED: name = "VERNEED"; break;
1098 case DT_VERNEEDNUM: name = "VERNEEDNUM"; break;
1099 case DT_AUXILIARY: name = "AUXILIARY"; stringp = TRUE; break;
1100 case DT_USED: name = "USED"; break;
1101 case DT_FILTER: name = "FILTER"; stringp = TRUE; break;
1104 fprintf (f, " %-11s ", name);
1106 fprintf (f, "0x%lx", (unsigned long) dyn.d_un.d_val);
1110 unsigned int tagv = dyn.d_un.d_val;
1112 string = bfd_elf_string_from_elf_section (abfd, shlink, tagv);
1115 fprintf (f, "%s", string);
1124 if ((elf_dynverdef (abfd) != 0 && elf_tdata (abfd)->verdef == NULL)
1125 || (elf_dynverref (abfd) != 0 && elf_tdata (abfd)->verref == NULL))
1127 if (! _bfd_elf_slurp_version_tables (abfd))
1131 if (elf_dynverdef (abfd) != 0)
1133 Elf_Internal_Verdef *t;
1135 fprintf (f, _("\nVersion definitions:\n"));
1136 for (t = elf_tdata (abfd)->verdef; t != NULL; t = t->vd_nextdef)
1138 fprintf (f, "%d 0x%2.2x 0x%8.8lx %s\n", t->vd_ndx,
1139 t->vd_flags, t->vd_hash, t->vd_nodename);
1140 if (t->vd_auxptr->vda_nextptr != NULL)
1142 Elf_Internal_Verdaux *a;
1145 for (a = t->vd_auxptr->vda_nextptr;
1148 fprintf (f, "%s ", a->vda_nodename);
1154 if (elf_dynverref (abfd) != 0)
1156 Elf_Internal_Verneed *t;
1158 fprintf (f, _("\nVersion References:\n"));
1159 for (t = elf_tdata (abfd)->verref; t != NULL; t = t->vn_nextref)
1161 Elf_Internal_Vernaux *a;
1163 fprintf (f, _(" required from %s:\n"), t->vn_filename);
1164 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
1165 fprintf (f, " 0x%8.8lx 0x%2.2x %2.2d %s\n", a->vna_hash,
1166 a->vna_flags, a->vna_other, a->vna_nodename);
1178 /* Display ELF-specific fields of a symbol. */
1181 bfd_elf_print_symbol (bfd *abfd,
1184 bfd_print_symbol_type how)
1189 case bfd_print_symbol_name:
1190 fprintf (file, "%s", symbol->name);
1192 case bfd_print_symbol_more:
1193 fprintf (file, "elf ");
1194 bfd_fprintf_vma (abfd, file, symbol->value);
1195 fprintf (file, " %lx", (long) symbol->flags);
1197 case bfd_print_symbol_all:
1199 const char *section_name;
1200 const char *name = NULL;
1201 const struct elf_backend_data *bed;
1202 unsigned char st_other;
1205 section_name = symbol->section ? symbol->section->name : "(*none*)";
1207 bed = get_elf_backend_data (abfd);
1208 if (bed->elf_backend_print_symbol_all)
1209 name = (*bed->elf_backend_print_symbol_all) (abfd, filep, symbol);
1213 name = symbol->name;
1214 bfd_print_symbol_vandf (abfd, file, symbol);
1217 fprintf (file, " %s\t", section_name);
1218 /* Print the "other" value for a symbol. For common symbols,
1219 we've already printed the size; now print the alignment.
1220 For other symbols, we have no specified alignment, and
1221 we've printed the address; now print the size. */
1222 if (bfd_is_com_section (symbol->section))
1223 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_value;
1225 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_size;
1226 bfd_fprintf_vma (abfd, file, val);
1228 /* If we have version information, print it. */
1229 if (elf_tdata (abfd)->dynversym_section != 0
1230 && (elf_tdata (abfd)->dynverdef_section != 0
1231 || elf_tdata (abfd)->dynverref_section != 0))
1233 unsigned int vernum;
1234 const char *version_string;
1236 vernum = ((elf_symbol_type *) symbol)->version & VERSYM_VERSION;
1239 version_string = "";
1240 else if (vernum == 1)
1241 version_string = "Base";
1242 else if (vernum <= elf_tdata (abfd)->cverdefs)
1244 elf_tdata (abfd)->verdef[vernum - 1].vd_nodename;
1247 Elf_Internal_Verneed *t;
1249 version_string = "";
1250 for (t = elf_tdata (abfd)->verref;
1254 Elf_Internal_Vernaux *a;
1256 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
1258 if (a->vna_other == vernum)
1260 version_string = a->vna_nodename;
1267 if ((((elf_symbol_type *) symbol)->version & VERSYM_HIDDEN) == 0)
1268 fprintf (file, " %-11s", version_string);
1273 fprintf (file, " (%s)", version_string);
1274 for (i = 10 - strlen (version_string); i > 0; --i)
1279 /* If the st_other field is not zero, print it. */
1280 st_other = ((elf_symbol_type *) symbol)->internal_elf_sym.st_other;
1285 case STV_INTERNAL: fprintf (file, " .internal"); break;
1286 case STV_HIDDEN: fprintf (file, " .hidden"); break;
1287 case STV_PROTECTED: fprintf (file, " .protected"); break;
1289 /* Some other non-defined flags are also present, so print
1291 fprintf (file, " 0x%02x", (unsigned int) st_other);
1294 fprintf (file, " %s", name);
1300 /* Create an entry in an ELF linker hash table. */
1302 struct bfd_hash_entry *
1303 _bfd_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
1304 struct bfd_hash_table *table,
1307 /* Allocate the structure if it has not already been allocated by a
1311 entry = bfd_hash_allocate (table, sizeof (struct elf_link_hash_entry));
1316 /* Call the allocation method of the superclass. */
1317 entry = _bfd_link_hash_newfunc (entry, table, string);
1320 struct elf_link_hash_entry *ret = (struct elf_link_hash_entry *) entry;
1321 struct elf_link_hash_table *htab = (struct elf_link_hash_table *) table;
1323 /* Set local fields. */
1326 ret->dynstr_index = 0;
1327 ret->elf_hash_value = 0;
1328 ret->weakdef = NULL;
1329 ret->verinfo.verdef = NULL;
1330 ret->vtable_entries_size = 0;
1331 ret->vtable_entries_used = NULL;
1332 ret->vtable_parent = NULL;
1333 ret->got = htab->init_refcount;
1334 ret->plt = htab->init_refcount;
1336 ret->type = STT_NOTYPE;
1338 /* Assume that we have been called by a non-ELF symbol reader.
1339 This flag is then reset by the code which reads an ELF input
1340 file. This ensures that a symbol created by a non-ELF symbol
1341 reader will have the flag set correctly. */
1342 ret->elf_link_hash_flags = ELF_LINK_NON_ELF;
1348 /* Copy data from an indirect symbol to its direct symbol, hiding the
1349 old indirect symbol. Also used for copying flags to a weakdef. */
1352 _bfd_elf_link_hash_copy_indirect (const struct elf_backend_data *bed,
1353 struct elf_link_hash_entry *dir,
1354 struct elf_link_hash_entry *ind)
1357 bfd_signed_vma lowest_valid = bed->can_refcount;
1359 /* Copy down any references that we may have already seen to the
1360 symbol which just became indirect. */
1362 dir->elf_link_hash_flags
1363 |= ind->elf_link_hash_flags & (ELF_LINK_HASH_REF_DYNAMIC
1364 | ELF_LINK_HASH_REF_REGULAR
1365 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
1366 | ELF_LINK_NON_GOT_REF
1367 | ELF_LINK_HASH_NEEDS_PLT
1368 | ELF_LINK_POINTER_EQUALITY_NEEDED);
1370 if (ind->root.type != bfd_link_hash_indirect)
1373 /* Copy over the global and procedure linkage table refcount entries.
1374 These may have been already set up by a check_relocs routine. */
1375 tmp = dir->got.refcount;
1376 if (tmp < lowest_valid)
1378 dir->got.refcount = ind->got.refcount;
1379 ind->got.refcount = tmp;
1382 BFD_ASSERT (ind->got.refcount < lowest_valid);
1384 tmp = dir->plt.refcount;
1385 if (tmp < lowest_valid)
1387 dir->plt.refcount = ind->plt.refcount;
1388 ind->plt.refcount = tmp;
1391 BFD_ASSERT (ind->plt.refcount < lowest_valid);
1393 if (dir->dynindx == -1)
1395 dir->dynindx = ind->dynindx;
1396 dir->dynstr_index = ind->dynstr_index;
1398 ind->dynstr_index = 0;
1401 BFD_ASSERT (ind->dynindx == -1);
1405 _bfd_elf_link_hash_hide_symbol (struct bfd_link_info *info,
1406 struct elf_link_hash_entry *h,
1407 bfd_boolean force_local)
1409 h->plt = elf_hash_table (info)->init_offset;
1410 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
1413 h->elf_link_hash_flags |= ELF_LINK_FORCED_LOCAL;
1414 if (h->dynindx != -1)
1417 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
1423 /* Initialize an ELF linker hash table. */
1426 _bfd_elf_link_hash_table_init
1427 (struct elf_link_hash_table *table,
1429 struct bfd_hash_entry *(*newfunc) (struct bfd_hash_entry *,
1430 struct bfd_hash_table *,
1435 table->dynamic_sections_created = FALSE;
1436 table->dynobj = NULL;
1437 /* Make sure can_refcount is extended to the width and signedness of
1438 init_refcount before we subtract one from it. */
1439 table->init_refcount.refcount = get_elf_backend_data (abfd)->can_refcount;
1440 table->init_refcount.refcount -= 1;
1441 table->init_offset.offset = -(bfd_vma) 1;
1442 /* The first dynamic symbol is a dummy. */
1443 table->dynsymcount = 1;
1444 table->dynstr = NULL;
1445 table->bucketcount = 0;
1446 table->needed = NULL;
1448 table->stab_info = NULL;
1449 table->merge_info = NULL;
1450 memset (&table->eh_info, 0, sizeof (table->eh_info));
1451 table->dynlocal = NULL;
1452 table->runpath = NULL;
1453 table->tls_sec = NULL;
1454 table->tls_size = 0;
1455 table->loaded = NULL;
1457 ret = _bfd_link_hash_table_init (&table->root, abfd, newfunc);
1458 table->root.type = bfd_link_elf_hash_table;
1463 /* Create an ELF linker hash table. */
1465 struct bfd_link_hash_table *
1466 _bfd_elf_link_hash_table_create (bfd *abfd)
1468 struct elf_link_hash_table *ret;
1469 bfd_size_type amt = sizeof (struct elf_link_hash_table);
1471 ret = bfd_malloc (amt);
1475 if (! _bfd_elf_link_hash_table_init (ret, abfd, _bfd_elf_link_hash_newfunc))
1484 /* This is a hook for the ELF emulation code in the generic linker to
1485 tell the backend linker what file name to use for the DT_NEEDED
1486 entry for a dynamic object. */
1489 bfd_elf_set_dt_needed_name (bfd *abfd, const char *name)
1491 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
1492 && bfd_get_format (abfd) == bfd_object)
1493 elf_dt_name (abfd) = name;
1497 bfd_elf_set_dyn_lib_class (bfd *abfd, int lib_class)
1499 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
1500 && bfd_get_format (abfd) == bfd_object)
1501 elf_dyn_lib_class (abfd) = lib_class;
1504 /* Get the list of DT_NEEDED entries for a link. This is a hook for
1505 the linker ELF emulation code. */
1507 struct bfd_link_needed_list *
1508 bfd_elf_get_needed_list (bfd *abfd ATTRIBUTE_UNUSED,
1509 struct bfd_link_info *info)
1511 if (! is_elf_hash_table (info->hash))
1513 return elf_hash_table (info)->needed;
1516 /* Get the list of DT_RPATH/DT_RUNPATH entries for a link. This is a
1517 hook for the linker ELF emulation code. */
1519 struct bfd_link_needed_list *
1520 bfd_elf_get_runpath_list (bfd *abfd ATTRIBUTE_UNUSED,
1521 struct bfd_link_info *info)
1523 if (! is_elf_hash_table (info->hash))
1525 return elf_hash_table (info)->runpath;
1528 /* Get the name actually used for a dynamic object for a link. This
1529 is the SONAME entry if there is one. Otherwise, it is the string
1530 passed to bfd_elf_set_dt_needed_name, or it is the filename. */
1533 bfd_elf_get_dt_soname (bfd *abfd)
1535 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
1536 && bfd_get_format (abfd) == bfd_object)
1537 return elf_dt_name (abfd);
1541 /* Get the list of DT_NEEDED entries from a BFD. This is a hook for
1542 the ELF linker emulation code. */
1545 bfd_elf_get_bfd_needed_list (bfd *abfd,
1546 struct bfd_link_needed_list **pneeded)
1549 bfd_byte *dynbuf = NULL;
1551 unsigned long shlink;
1552 bfd_byte *extdyn, *extdynend;
1554 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
1558 if (bfd_get_flavour (abfd) != bfd_target_elf_flavour
1559 || bfd_get_format (abfd) != bfd_object)
1562 s = bfd_get_section_by_name (abfd, ".dynamic");
1563 if (s == NULL || s->_raw_size == 0)
1566 dynbuf = bfd_malloc (s->_raw_size);
1570 if (! bfd_get_section_contents (abfd, s, dynbuf, 0, s->_raw_size))
1573 elfsec = _bfd_elf_section_from_bfd_section (abfd, s);
1577 shlink = elf_elfsections (abfd)[elfsec]->sh_link;
1579 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
1580 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
1583 extdynend = extdyn + s->_raw_size;
1584 for (; extdyn < extdynend; extdyn += extdynsize)
1586 Elf_Internal_Dyn dyn;
1588 (*swap_dyn_in) (abfd, extdyn, &dyn);
1590 if (dyn.d_tag == DT_NULL)
1593 if (dyn.d_tag == DT_NEEDED)
1596 struct bfd_link_needed_list *l;
1597 unsigned int tagv = dyn.d_un.d_val;
1600 string = bfd_elf_string_from_elf_section (abfd, shlink, tagv);
1605 l = bfd_alloc (abfd, amt);
1626 /* Allocate an ELF string table--force the first byte to be zero. */
1628 struct bfd_strtab_hash *
1629 _bfd_elf_stringtab_init (void)
1631 struct bfd_strtab_hash *ret;
1633 ret = _bfd_stringtab_init ();
1638 loc = _bfd_stringtab_add (ret, "", TRUE, FALSE);
1639 BFD_ASSERT (loc == 0 || loc == (bfd_size_type) -1);
1640 if (loc == (bfd_size_type) -1)
1642 _bfd_stringtab_free (ret);
1649 /* ELF .o/exec file reading */
1651 /* Create a new bfd section from an ELF section header. */
1654 bfd_section_from_shdr (bfd *abfd, unsigned int shindex)
1656 Elf_Internal_Shdr *hdr = elf_elfsections (abfd)[shindex];
1657 Elf_Internal_Ehdr *ehdr = elf_elfheader (abfd);
1658 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
1661 name = elf_string_from_elf_strtab (abfd, hdr->sh_name);
1663 switch (hdr->sh_type)
1666 /* Inactive section. Throw it away. */
1669 case SHT_PROGBITS: /* Normal section with contents. */
1670 case SHT_NOBITS: /* .bss section. */
1671 case SHT_HASH: /* .hash section. */
1672 case SHT_NOTE: /* .note section. */
1673 case SHT_INIT_ARRAY: /* .init_array section. */
1674 case SHT_FINI_ARRAY: /* .fini_array section. */
1675 case SHT_PREINIT_ARRAY: /* .preinit_array section. */
1676 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1678 case SHT_DYNAMIC: /* Dynamic linking information. */
1679 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
1681 if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_STRTAB)
1683 Elf_Internal_Shdr *dynsymhdr;
1685 /* The shared libraries distributed with hpux11 have a bogus
1686 sh_link field for the ".dynamic" section. Find the
1687 string table for the ".dynsym" section instead. */
1688 if (elf_dynsymtab (abfd) != 0)
1690 dynsymhdr = elf_elfsections (abfd)[elf_dynsymtab (abfd)];
1691 hdr->sh_link = dynsymhdr->sh_link;
1695 unsigned int i, num_sec;
1697 num_sec = elf_numsections (abfd);
1698 for (i = 1; i < num_sec; i++)
1700 dynsymhdr = elf_elfsections (abfd)[i];
1701 if (dynsymhdr->sh_type == SHT_DYNSYM)
1703 hdr->sh_link = dynsymhdr->sh_link;
1711 case SHT_SYMTAB: /* A symbol table */
1712 if (elf_onesymtab (abfd) == shindex)
1715 BFD_ASSERT (hdr->sh_entsize == bed->s->sizeof_sym);
1716 BFD_ASSERT (elf_onesymtab (abfd) == 0);
1717 elf_onesymtab (abfd) = shindex;
1718 elf_tdata (abfd)->symtab_hdr = *hdr;
1719 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->symtab_hdr;
1720 abfd->flags |= HAS_SYMS;
1722 /* Sometimes a shared object will map in the symbol table. If
1723 SHF_ALLOC is set, and this is a shared object, then we also
1724 treat this section as a BFD section. We can not base the
1725 decision purely on SHF_ALLOC, because that flag is sometimes
1726 set in a relocatable object file, which would confuse the
1728 if ((hdr->sh_flags & SHF_ALLOC) != 0
1729 && (abfd->flags & DYNAMIC) != 0
1730 && ! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
1735 case SHT_DYNSYM: /* A dynamic symbol table */
1736 if (elf_dynsymtab (abfd) == shindex)
1739 BFD_ASSERT (hdr->sh_entsize == bed->s->sizeof_sym);
1740 BFD_ASSERT (elf_dynsymtab (abfd) == 0);
1741 elf_dynsymtab (abfd) = shindex;
1742 elf_tdata (abfd)->dynsymtab_hdr = *hdr;
1743 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->dynsymtab_hdr;
1744 abfd->flags |= HAS_SYMS;
1746 /* Besides being a symbol table, we also treat this as a regular
1747 section, so that objcopy can handle it. */
1748 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1750 case SHT_SYMTAB_SHNDX: /* Symbol section indices when >64k sections */
1751 if (elf_symtab_shndx (abfd) == shindex)
1754 /* Get the associated symbol table. */
1755 if (! bfd_section_from_shdr (abfd, hdr->sh_link)
1756 || hdr->sh_link != elf_onesymtab (abfd))
1759 elf_symtab_shndx (abfd) = shindex;
1760 elf_tdata (abfd)->symtab_shndx_hdr = *hdr;
1761 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->symtab_shndx_hdr;
1764 case SHT_STRTAB: /* A string table */
1765 if (hdr->bfd_section != NULL)
1767 if (ehdr->e_shstrndx == shindex)
1769 elf_tdata (abfd)->shstrtab_hdr = *hdr;
1770 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->shstrtab_hdr;
1774 unsigned int i, num_sec;
1776 num_sec = elf_numsections (abfd);
1777 for (i = 1; i < num_sec; i++)
1779 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1780 if (hdr2->sh_link == shindex)
1782 if (! bfd_section_from_shdr (abfd, i))
1784 if (elf_onesymtab (abfd) == i)
1786 elf_tdata (abfd)->strtab_hdr = *hdr;
1787 elf_elfsections (abfd)[shindex] =
1788 &elf_tdata (abfd)->strtab_hdr;
1791 if (elf_dynsymtab (abfd) == i)
1793 elf_tdata (abfd)->dynstrtab_hdr = *hdr;
1794 elf_elfsections (abfd)[shindex] = hdr =
1795 &elf_tdata (abfd)->dynstrtab_hdr;
1796 /* We also treat this as a regular section, so
1797 that objcopy can handle it. */
1800 #if 0 /* Not handling other string tables specially right now. */
1801 hdr2 = elf_elfsections (abfd)[i]; /* in case it moved */
1802 /* We have a strtab for some random other section. */
1803 newsect = (asection *) hdr2->bfd_section;
1806 hdr->bfd_section = newsect;
1807 hdr2 = &elf_section_data (newsect)->str_hdr;
1809 elf_elfsections (abfd)[shindex] = hdr2;
1815 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1819 /* *These* do a lot of work -- but build no sections! */
1821 asection *target_sect;
1822 Elf_Internal_Shdr *hdr2;
1823 unsigned int num_sec = elf_numsections (abfd);
1825 /* Check for a bogus link to avoid crashing. */
1826 if ((hdr->sh_link >= SHN_LORESERVE && hdr->sh_link <= SHN_HIRESERVE)
1827 || hdr->sh_link >= num_sec)
1829 ((*_bfd_error_handler)
1830 (_("%s: invalid link %lu for reloc section %s (index %u)"),
1831 bfd_archive_filename (abfd), hdr->sh_link, name, shindex));
1832 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1835 /* For some incomprehensible reason Oracle distributes
1836 libraries for Solaris in which some of the objects have
1837 bogus sh_link fields. It would be nice if we could just
1838 reject them, but, unfortunately, some people need to use
1839 them. We scan through the section headers; if we find only
1840 one suitable symbol table, we clobber the sh_link to point
1841 to it. I hope this doesn't break anything. */
1842 if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_SYMTAB
1843 && elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_DYNSYM)
1849 for (scan = 1; scan < num_sec; scan++)
1851 if (elf_elfsections (abfd)[scan]->sh_type == SHT_SYMTAB
1852 || elf_elfsections (abfd)[scan]->sh_type == SHT_DYNSYM)
1863 hdr->sh_link = found;
1866 /* Get the symbol table. */
1867 if (elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_SYMTAB
1868 && ! bfd_section_from_shdr (abfd, hdr->sh_link))
1871 /* If this reloc section does not use the main symbol table we
1872 don't treat it as a reloc section. BFD can't adequately
1873 represent such a section, so at least for now, we don't
1874 try. We just present it as a normal section. We also
1875 can't use it as a reloc section if it points to the null
1877 if (hdr->sh_link != elf_onesymtab (abfd) || hdr->sh_info == SHN_UNDEF)
1878 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1880 if (! bfd_section_from_shdr (abfd, hdr->sh_info))
1882 target_sect = bfd_section_from_elf_index (abfd, hdr->sh_info);
1883 if (target_sect == NULL)
1886 if ((target_sect->flags & SEC_RELOC) == 0
1887 || target_sect->reloc_count == 0)
1888 hdr2 = &elf_section_data (target_sect)->rel_hdr;
1892 BFD_ASSERT (elf_section_data (target_sect)->rel_hdr2 == NULL);
1893 amt = sizeof (*hdr2);
1894 hdr2 = bfd_alloc (abfd, amt);
1895 elf_section_data (target_sect)->rel_hdr2 = hdr2;
1898 elf_elfsections (abfd)[shindex] = hdr2;
1899 target_sect->reloc_count += NUM_SHDR_ENTRIES (hdr);
1900 target_sect->flags |= SEC_RELOC;
1901 target_sect->relocation = NULL;
1902 target_sect->rel_filepos = hdr->sh_offset;
1903 /* In the section to which the relocations apply, mark whether
1904 its relocations are of the REL or RELA variety. */
1905 if (hdr->sh_size != 0)
1906 target_sect->use_rela_p = hdr->sh_type == SHT_RELA;
1907 abfd->flags |= HAS_RELOC;
1912 case SHT_GNU_verdef:
1913 elf_dynverdef (abfd) = shindex;
1914 elf_tdata (abfd)->dynverdef_hdr = *hdr;
1915 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1918 case SHT_GNU_versym:
1919 elf_dynversym (abfd) = shindex;
1920 elf_tdata (abfd)->dynversym_hdr = *hdr;
1921 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1924 case SHT_GNU_verneed:
1925 elf_dynverref (abfd) = shindex;
1926 elf_tdata (abfd)->dynverref_hdr = *hdr;
1927 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1934 /* We need a BFD section for objcopy and relocatable linking,
1935 and it's handy to have the signature available as the section
1937 name = group_signature (abfd, hdr);
1940 if (!_bfd_elf_make_section_from_shdr (abfd, hdr, name))
1942 if (hdr->contents != NULL)
1944 Elf_Internal_Group *idx = (Elf_Internal_Group *) hdr->contents;
1945 unsigned int n_elt = hdr->sh_size / 4;
1948 if (idx->flags & GRP_COMDAT)
1949 hdr->bfd_section->flags
1950 |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
1952 while (--n_elt != 0)
1953 if ((s = (++idx)->shdr->bfd_section) != NULL
1954 && elf_next_in_group (s) != NULL)
1956 elf_next_in_group (hdr->bfd_section) = s;
1963 /* Check for any processor-specific section types. */
1965 if (bed->elf_backend_section_from_shdr)
1966 (*bed->elf_backend_section_from_shdr) (abfd, hdr, name);
1974 /* Return the section for the local symbol specified by ABFD, R_SYMNDX.
1975 Return SEC for sections that have no elf section, and NULL on error. */
1978 bfd_section_from_r_symndx (bfd *abfd,
1979 struct sym_sec_cache *cache,
1981 unsigned long r_symndx)
1983 Elf_Internal_Shdr *symtab_hdr;
1984 unsigned char esym[sizeof (Elf64_External_Sym)];
1985 Elf_External_Sym_Shndx eshndx;
1986 Elf_Internal_Sym isym;
1987 unsigned int ent = r_symndx % LOCAL_SYM_CACHE_SIZE;
1989 if (cache->abfd == abfd && cache->indx[ent] == r_symndx)
1990 return cache->sec[ent];
1992 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1993 if (bfd_elf_get_elf_syms (abfd, symtab_hdr, 1, r_symndx,
1994 &isym, esym, &eshndx) == NULL)
1997 if (cache->abfd != abfd)
1999 memset (cache->indx, -1, sizeof (cache->indx));
2002 cache->indx[ent] = r_symndx;
2003 cache->sec[ent] = sec;
2004 if ((isym.st_shndx != SHN_UNDEF && isym.st_shndx < SHN_LORESERVE)
2005 || isym.st_shndx > SHN_HIRESERVE)
2008 s = bfd_section_from_elf_index (abfd, isym.st_shndx);
2010 cache->sec[ent] = s;
2012 return cache->sec[ent];
2015 /* Given an ELF section number, retrieve the corresponding BFD
2019 bfd_section_from_elf_index (bfd *abfd, unsigned int index)
2021 if (index >= elf_numsections (abfd))
2023 return elf_elfsections (abfd)[index]->bfd_section;
2026 static struct bfd_elf_special_section const special_sections[] =
2028 { ".bss", 4, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2029 { ".comment", 8, 0, SHT_PROGBITS, 0 },
2030 { ".data", 5, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2031 { ".data1", 6, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2032 { ".debug", 6, 0, SHT_PROGBITS, 0 },
2033 { ".fini", 5, 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2034 { ".init", 5, 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2035 { ".line", 5, 0, SHT_PROGBITS, 0 },
2036 { ".rodata", 7, -2, SHT_PROGBITS, SHF_ALLOC },
2037 { ".rodata1", 8, 0, SHT_PROGBITS, SHF_ALLOC },
2038 { ".tbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
2039 { ".tdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
2040 { ".text", 5, -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2041 { ".init_array", 11, 0, SHT_INIT_ARRAY, SHF_ALLOC + SHF_WRITE },
2042 { ".fini_array", 11, 0, SHT_FINI_ARRAY, SHF_ALLOC + SHF_WRITE },
2043 { ".preinit_array", 14, 0, SHT_PREINIT_ARRAY, SHF_ALLOC + SHF_WRITE },
2044 { ".debug_line", 11, 0, SHT_PROGBITS, 0 },
2045 { ".debug_info", 11, 0, SHT_PROGBITS, 0 },
2046 { ".debug_abbrev", 13, 0, SHT_PROGBITS, 0 },
2047 { ".debug_aranges", 14, 0, SHT_PROGBITS, 0 },
2048 { ".dynamic", 8, 0, SHT_DYNAMIC, SHF_ALLOC },
2049 { ".dynstr", 7, 0, SHT_STRTAB, SHF_ALLOC },
2050 { ".dynsym", 7, 0, SHT_DYNSYM, SHF_ALLOC },
2051 { ".got", 4, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2052 { ".hash", 5, 0, SHT_HASH, SHF_ALLOC },
2053 { ".interp", 7, 0, SHT_PROGBITS, 0 },
2054 { ".plt", 4, 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2055 { ".shstrtab", 9, 0, SHT_STRTAB, 0 },
2056 { ".strtab", 7, 0, SHT_STRTAB, 0 },
2057 { ".symtab", 7, 0, SHT_SYMTAB, 0 },
2058 { ".gnu.version", 12, 0, SHT_GNU_versym, 0 },
2059 { ".gnu.version_d", 14, 0, SHT_GNU_verdef, 0 },
2060 { ".gnu.version_r", 14, 0, SHT_GNU_verneed, 0 },
2061 { ".note", 5, -1, SHT_NOTE, 0 },
2062 { ".rela", 5, -1, SHT_RELA, 0 },
2063 { ".rel", 4, -1, SHT_REL, 0 },
2064 { ".stabstr", 5, 3, SHT_STRTAB, 0 },
2065 { NULL, 0, 0, 0, 0 }
2068 static const struct bfd_elf_special_section *
2069 get_special_section (const char *name,
2070 const struct bfd_elf_special_section *special_sections,
2074 int len = strlen (name);
2076 for (i = 0; special_sections[i].prefix != NULL; i++)
2079 int prefix_len = special_sections[i].prefix_length;
2081 if (len < prefix_len)
2083 if (memcmp (name, special_sections[i].prefix, prefix_len) != 0)
2086 suffix_len = special_sections[i].suffix_length;
2087 if (suffix_len <= 0)
2089 if (name[prefix_len] != 0)
2091 if (suffix_len == 0)
2093 if (name[prefix_len] != '.'
2094 && (suffix_len == -2
2095 || (rela && special_sections[i].type == SHT_REL)))
2101 if (len < prefix_len + suffix_len)
2103 if (memcmp (name + len - suffix_len,
2104 special_sections[i].prefix + prefix_len,
2108 return &special_sections[i];
2114 const struct bfd_elf_special_section *
2115 _bfd_elf_get_sec_type_attr (bfd *abfd, const char *name)
2117 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2118 const struct bfd_elf_special_section *ssect = NULL;
2120 /* See if this is one of the special sections. */
2123 unsigned int rela = bed->default_use_rela_p;
2125 if (bed->special_sections)
2126 ssect = get_special_section (name, bed->special_sections, rela);
2129 ssect = get_special_section (name, special_sections, rela);
2136 _bfd_elf_new_section_hook (bfd *abfd, asection *sec)
2138 struct bfd_elf_section_data *sdata;
2139 const struct bfd_elf_special_section *ssect;
2141 sdata = (struct bfd_elf_section_data *) sec->used_by_bfd;
2144 sdata = bfd_zalloc (abfd, sizeof (*sdata));
2147 sec->used_by_bfd = sdata;
2150 elf_section_type (sec) = SHT_NULL;
2151 ssect = _bfd_elf_get_sec_type_attr (abfd, sec->name);
2154 elf_section_type (sec) = ssect->type;
2155 elf_section_flags (sec) = ssect->attr;
2158 /* Indicate whether or not this section should use RELA relocations. */
2159 sec->use_rela_p = get_elf_backend_data (abfd)->default_use_rela_p;
2164 /* Create a new bfd section from an ELF program header.
2166 Since program segments have no names, we generate a synthetic name
2167 of the form segment<NUM>, where NUM is generally the index in the
2168 program header table. For segments that are split (see below) we
2169 generate the names segment<NUM>a and segment<NUM>b.
2171 Note that some program segments may have a file size that is different than
2172 (less than) the memory size. All this means is that at execution the
2173 system must allocate the amount of memory specified by the memory size,
2174 but only initialize it with the first "file size" bytes read from the
2175 file. This would occur for example, with program segments consisting
2176 of combined data+bss.
2178 To handle the above situation, this routine generates TWO bfd sections
2179 for the single program segment. The first has the length specified by
2180 the file size of the segment, and the second has the length specified
2181 by the difference between the two sizes. In effect, the segment is split
2182 into it's initialized and uninitialized parts.
2187 _bfd_elf_make_section_from_phdr (bfd *abfd,
2188 Elf_Internal_Phdr *hdr,
2190 const char *typename)
2198 split = ((hdr->p_memsz > 0)
2199 && (hdr->p_filesz > 0)
2200 && (hdr->p_memsz > hdr->p_filesz));
2201 sprintf (namebuf, "%s%d%s", typename, index, split ? "a" : "");
2202 len = strlen (namebuf) + 1;
2203 name = bfd_alloc (abfd, len);
2206 memcpy (name, namebuf, len);
2207 newsect = bfd_make_section (abfd, name);
2208 if (newsect == NULL)
2210 newsect->vma = hdr->p_vaddr;
2211 newsect->lma = hdr->p_paddr;
2212 newsect->_raw_size = hdr->p_filesz;
2213 newsect->filepos = hdr->p_offset;
2214 newsect->flags |= SEC_HAS_CONTENTS;
2215 newsect->alignment_power = bfd_log2 (hdr->p_align);
2216 if (hdr->p_type == PT_LOAD)
2218 newsect->flags |= SEC_ALLOC;
2219 newsect->flags |= SEC_LOAD;
2220 if (hdr->p_flags & PF_X)
2222 /* FIXME: all we known is that it has execute PERMISSION,
2224 newsect->flags |= SEC_CODE;
2227 if (!(hdr->p_flags & PF_W))
2229 newsect->flags |= SEC_READONLY;
2234 sprintf (namebuf, "%s%db", typename, index);
2235 len = strlen (namebuf) + 1;
2236 name = bfd_alloc (abfd, len);
2239 memcpy (name, namebuf, len);
2240 newsect = bfd_make_section (abfd, name);
2241 if (newsect == NULL)
2243 newsect->vma = hdr->p_vaddr + hdr->p_filesz;
2244 newsect->lma = hdr->p_paddr + hdr->p_filesz;
2245 newsect->_raw_size = hdr->p_memsz - hdr->p_filesz;
2246 if (hdr->p_type == PT_LOAD)
2248 newsect->flags |= SEC_ALLOC;
2249 if (hdr->p_flags & PF_X)
2250 newsect->flags |= SEC_CODE;
2252 if (!(hdr->p_flags & PF_W))
2253 newsect->flags |= SEC_READONLY;
2260 bfd_section_from_phdr (bfd *abfd, Elf_Internal_Phdr *hdr, int index)
2262 const struct elf_backend_data *bed;
2264 switch (hdr->p_type)
2267 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "null");
2270 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "load");
2273 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "dynamic");
2276 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "interp");
2279 if (! _bfd_elf_make_section_from_phdr (abfd, hdr, index, "note"))
2281 if (! elfcore_read_notes (abfd, hdr->p_offset, hdr->p_filesz))
2286 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "shlib");
2289 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "phdr");
2291 case PT_GNU_EH_FRAME:
2292 return _bfd_elf_make_section_from_phdr (abfd, hdr, index,
2296 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "stack");
2299 /* Check for any processor-specific program segment types.
2300 If no handler for them, default to making "segment" sections. */
2301 bed = get_elf_backend_data (abfd);
2302 if (bed->elf_backend_section_from_phdr)
2303 return (*bed->elf_backend_section_from_phdr) (abfd, hdr, index);
2305 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "segment");
2309 /* Initialize REL_HDR, the section-header for new section, containing
2310 relocations against ASECT. If USE_RELA_P is TRUE, we use RELA
2311 relocations; otherwise, we use REL relocations. */
2314 _bfd_elf_init_reloc_shdr (bfd *abfd,
2315 Elf_Internal_Shdr *rel_hdr,
2317 bfd_boolean use_rela_p)
2320 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2321 bfd_size_type amt = sizeof ".rela" + strlen (asect->name);
2323 name = bfd_alloc (abfd, amt);
2326 sprintf (name, "%s%s", use_rela_p ? ".rela" : ".rel", asect->name);
2328 (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd), name,
2330 if (rel_hdr->sh_name == (unsigned int) -1)
2332 rel_hdr->sh_type = use_rela_p ? SHT_RELA : SHT_REL;
2333 rel_hdr->sh_entsize = (use_rela_p
2334 ? bed->s->sizeof_rela
2335 : bed->s->sizeof_rel);
2336 rel_hdr->sh_addralign = 1 << bed->s->log_file_align;
2337 rel_hdr->sh_flags = 0;
2338 rel_hdr->sh_addr = 0;
2339 rel_hdr->sh_size = 0;
2340 rel_hdr->sh_offset = 0;
2345 /* Set up an ELF internal section header for a section. */
2348 elf_fake_sections (bfd *abfd, asection *asect, void *failedptrarg)
2350 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2351 bfd_boolean *failedptr = failedptrarg;
2352 Elf_Internal_Shdr *this_hdr;
2356 /* We already failed; just get out of the bfd_map_over_sections
2361 this_hdr = &elf_section_data (asect)->this_hdr;
2363 this_hdr->sh_name = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
2364 asect->name, FALSE);
2365 if (this_hdr->sh_name == (unsigned int) -1)
2371 this_hdr->sh_flags = 0;
2373 if ((asect->flags & SEC_ALLOC) != 0
2374 || asect->user_set_vma)
2375 this_hdr->sh_addr = asect->vma;
2377 this_hdr->sh_addr = 0;
2379 this_hdr->sh_offset = 0;
2380 this_hdr->sh_size = asect->_raw_size;
2381 this_hdr->sh_link = 0;
2382 this_hdr->sh_addralign = 1 << asect->alignment_power;
2383 /* The sh_entsize and sh_info fields may have been set already by
2384 copy_private_section_data. */
2386 this_hdr->bfd_section = asect;
2387 this_hdr->contents = NULL;
2389 /* If the section type is unspecified, we set it based on
2391 if (this_hdr->sh_type == SHT_NULL)
2393 if ((asect->flags & SEC_ALLOC) != 0
2394 && (((asect->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
2395 || (asect->flags & SEC_NEVER_LOAD) != 0))
2396 this_hdr->sh_type = SHT_NOBITS;
2398 this_hdr->sh_type = SHT_PROGBITS;
2401 switch (this_hdr->sh_type)
2407 case SHT_INIT_ARRAY:
2408 case SHT_FINI_ARRAY:
2409 case SHT_PREINIT_ARRAY:
2416 this_hdr->sh_entsize = bed->s->sizeof_hash_entry;
2420 this_hdr->sh_entsize = bed->s->sizeof_sym;
2424 this_hdr->sh_entsize = bed->s->sizeof_dyn;
2428 if (get_elf_backend_data (abfd)->may_use_rela_p)
2429 this_hdr->sh_entsize = bed->s->sizeof_rela;
2433 if (get_elf_backend_data (abfd)->may_use_rel_p)
2434 this_hdr->sh_entsize = bed->s->sizeof_rel;
2437 case SHT_GNU_versym:
2438 this_hdr->sh_entsize = sizeof (Elf_External_Versym);
2441 case SHT_GNU_verdef:
2442 this_hdr->sh_entsize = 0;
2443 /* objcopy or strip will copy over sh_info, but may not set
2444 cverdefs. The linker will set cverdefs, but sh_info will be
2446 if (this_hdr->sh_info == 0)
2447 this_hdr->sh_info = elf_tdata (abfd)->cverdefs;
2449 BFD_ASSERT (elf_tdata (abfd)->cverdefs == 0
2450 || this_hdr->sh_info == elf_tdata (abfd)->cverdefs);
2453 case SHT_GNU_verneed:
2454 this_hdr->sh_entsize = 0;
2455 /* objcopy or strip will copy over sh_info, but may not set
2456 cverrefs. The linker will set cverrefs, but sh_info will be
2458 if (this_hdr->sh_info == 0)
2459 this_hdr->sh_info = elf_tdata (abfd)->cverrefs;
2461 BFD_ASSERT (elf_tdata (abfd)->cverrefs == 0
2462 || this_hdr->sh_info == elf_tdata (abfd)->cverrefs);
2466 this_hdr->sh_entsize = 4;
2470 if ((asect->flags & SEC_ALLOC) != 0)
2471 this_hdr->sh_flags |= SHF_ALLOC;
2472 if ((asect->flags & SEC_READONLY) == 0)
2473 this_hdr->sh_flags |= SHF_WRITE;
2474 if ((asect->flags & SEC_CODE) != 0)
2475 this_hdr->sh_flags |= SHF_EXECINSTR;
2476 if ((asect->flags & SEC_MERGE) != 0)
2478 this_hdr->sh_flags |= SHF_MERGE;
2479 this_hdr->sh_entsize = asect->entsize;
2480 if ((asect->flags & SEC_STRINGS) != 0)
2481 this_hdr->sh_flags |= SHF_STRINGS;
2483 if ((asect->flags & SEC_GROUP) == 0 && elf_group_name (asect) != NULL)
2484 this_hdr->sh_flags |= SHF_GROUP;
2485 if ((asect->flags & SEC_THREAD_LOCAL) != 0)
2487 this_hdr->sh_flags |= SHF_TLS;
2488 if (asect->_raw_size == 0 && (asect->flags & SEC_HAS_CONTENTS) == 0)
2490 struct bfd_link_order *o;
2492 this_hdr->sh_size = 0;
2493 for (o = asect->link_order_head; o != NULL; o = o->next)
2494 if (this_hdr->sh_size < o->offset + o->size)
2495 this_hdr->sh_size = o->offset + o->size;
2496 if (this_hdr->sh_size)
2497 this_hdr->sh_type = SHT_NOBITS;
2501 /* Check for processor-specific section types. */
2502 if (bed->elf_backend_fake_sections
2503 && !(*bed->elf_backend_fake_sections) (abfd, this_hdr, asect))
2506 /* If the section has relocs, set up a section header for the
2507 SHT_REL[A] section. If two relocation sections are required for
2508 this section, it is up to the processor-specific back-end to
2509 create the other. */
2510 if ((asect->flags & SEC_RELOC) != 0
2511 && !_bfd_elf_init_reloc_shdr (abfd,
2512 &elf_section_data (asect)->rel_hdr,
2518 /* Fill in the contents of a SHT_GROUP section. */
2521 bfd_elf_set_group_contents (bfd *abfd, asection *sec, void *failedptrarg)
2523 bfd_boolean *failedptr = failedptrarg;
2524 unsigned long symindx;
2525 asection *elt, *first;
2527 struct bfd_link_order *l;
2530 if (elf_section_data (sec)->this_hdr.sh_type != SHT_GROUP
2535 if (elf_group_id (sec) != NULL)
2536 symindx = elf_group_id (sec)->udata.i;
2540 /* If called from the assembler, swap_out_syms will have set up
2541 elf_section_syms; If called for "ld -r", use target_index. */
2542 if (elf_section_syms (abfd) != NULL)
2543 symindx = elf_section_syms (abfd)[sec->index]->udata.i;
2545 symindx = sec->target_index;
2547 elf_section_data (sec)->this_hdr.sh_info = symindx;
2549 /* The contents won't be allocated for "ld -r" or objcopy. */
2551 if (sec->contents == NULL)
2554 sec->contents = bfd_alloc (abfd, sec->_raw_size);
2556 /* Arrange for the section to be written out. */
2557 elf_section_data (sec)->this_hdr.contents = sec->contents;
2558 if (sec->contents == NULL)
2565 loc = sec->contents + sec->_raw_size;
2567 /* Get the pointer to the first section in the group that gas
2568 squirreled away here. objcopy arranges for this to be set to the
2569 start of the input section group. */
2570 first = elt = elf_next_in_group (sec);
2572 /* First element is a flag word. Rest of section is elf section
2573 indices for all the sections of the group. Write them backwards
2574 just to keep the group in the same order as given in .section
2575 directives, not that it matters. */
2584 s = s->output_section;
2587 idx = elf_section_data (s)->this_idx;
2588 H_PUT_32 (abfd, idx, loc);
2589 elt = elf_next_in_group (elt);
2594 /* If this is a relocatable link, then the above did nothing because
2595 SEC is the output section. Look through the input sections
2597 for (l = sec->link_order_head; l != NULL; l = l->next)
2598 if (l->type == bfd_indirect_link_order
2599 && (elt = elf_next_in_group (l->u.indirect.section)) != NULL)
2604 elf_section_data (elt->output_section)->this_idx, loc);
2605 elt = elf_next_in_group (elt);
2606 /* During a relocatable link, the lists are circular. */
2608 while (elt != elf_next_in_group (l->u.indirect.section));
2610 /* With ld -r, merging SHT_GROUP sections results in wasted space
2611 due to allowing for the flag word on each input. We may well
2612 duplicate entries too. */
2613 while ((loc -= 4) > sec->contents)
2614 H_PUT_32 (abfd, 0, loc);
2616 if (loc != sec->contents)
2619 H_PUT_32 (abfd, sec->flags & SEC_LINK_ONCE ? GRP_COMDAT : 0, loc);
2622 /* Assign all ELF section numbers. The dummy first section is handled here
2623 too. The link/info pointers for the standard section types are filled
2624 in here too, while we're at it. */
2627 assign_section_numbers (bfd *abfd)
2629 struct elf_obj_tdata *t = elf_tdata (abfd);
2631 unsigned int section_number, secn;
2632 Elf_Internal_Shdr **i_shdrp;
2637 _bfd_elf_strtab_clear_all_refs (elf_shstrtab (abfd));
2639 for (sec = abfd->sections; sec; sec = sec->next)
2641 struct bfd_elf_section_data *d = elf_section_data (sec);
2643 if (section_number == SHN_LORESERVE)
2644 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2645 d->this_idx = section_number++;
2646 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->this_hdr.sh_name);
2647 if ((sec->flags & SEC_RELOC) == 0)
2651 if (section_number == SHN_LORESERVE)
2652 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2653 d->rel_idx = section_number++;
2654 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rel_hdr.sh_name);
2659 if (section_number == SHN_LORESERVE)
2660 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2661 d->rel_idx2 = section_number++;
2662 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rel_hdr2->sh_name);
2668 if (section_number == SHN_LORESERVE)
2669 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2670 t->shstrtab_section = section_number++;
2671 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->shstrtab_hdr.sh_name);
2672 elf_elfheader (abfd)->e_shstrndx = t->shstrtab_section;
2674 if (bfd_get_symcount (abfd) > 0)
2676 if (section_number == SHN_LORESERVE)
2677 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2678 t->symtab_section = section_number++;
2679 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->symtab_hdr.sh_name);
2680 if (section_number > SHN_LORESERVE - 2)
2682 if (section_number == SHN_LORESERVE)
2683 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2684 t->symtab_shndx_section = section_number++;
2685 t->symtab_shndx_hdr.sh_name
2686 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
2687 ".symtab_shndx", FALSE);
2688 if (t->symtab_shndx_hdr.sh_name == (unsigned int) -1)
2691 if (section_number == SHN_LORESERVE)
2692 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2693 t->strtab_section = section_number++;
2694 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->strtab_hdr.sh_name);
2697 _bfd_elf_strtab_finalize (elf_shstrtab (abfd));
2698 t->shstrtab_hdr.sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
2700 elf_numsections (abfd) = section_number;
2701 elf_elfheader (abfd)->e_shnum = section_number;
2702 if (section_number > SHN_LORESERVE)
2703 elf_elfheader (abfd)->e_shnum -= SHN_HIRESERVE + 1 - SHN_LORESERVE;
2705 /* Set up the list of section header pointers, in agreement with the
2707 amt = section_number * sizeof (Elf_Internal_Shdr *);
2708 i_shdrp = bfd_zalloc (abfd, amt);
2709 if (i_shdrp == NULL)
2712 amt = sizeof (Elf_Internal_Shdr);
2713 i_shdrp[0] = bfd_zalloc (abfd, amt);
2714 if (i_shdrp[0] == NULL)
2716 bfd_release (abfd, i_shdrp);
2720 elf_elfsections (abfd) = i_shdrp;
2722 i_shdrp[t->shstrtab_section] = &t->shstrtab_hdr;
2723 if (bfd_get_symcount (abfd) > 0)
2725 i_shdrp[t->symtab_section] = &t->symtab_hdr;
2726 if (elf_numsections (abfd) > SHN_LORESERVE)
2728 i_shdrp[t->symtab_shndx_section] = &t->symtab_shndx_hdr;
2729 t->symtab_shndx_hdr.sh_link = t->symtab_section;
2731 i_shdrp[t->strtab_section] = &t->strtab_hdr;
2732 t->symtab_hdr.sh_link = t->strtab_section;
2734 for (sec = abfd->sections; sec; sec = sec->next)
2736 struct bfd_elf_section_data *d = elf_section_data (sec);
2740 i_shdrp[d->this_idx] = &d->this_hdr;
2741 if (d->rel_idx != 0)
2742 i_shdrp[d->rel_idx] = &d->rel_hdr;
2743 if (d->rel_idx2 != 0)
2744 i_shdrp[d->rel_idx2] = d->rel_hdr2;
2746 /* Fill in the sh_link and sh_info fields while we're at it. */
2748 /* sh_link of a reloc section is the section index of the symbol
2749 table. sh_info is the section index of the section to which
2750 the relocation entries apply. */
2751 if (d->rel_idx != 0)
2753 d->rel_hdr.sh_link = t->symtab_section;
2754 d->rel_hdr.sh_info = d->this_idx;
2756 if (d->rel_idx2 != 0)
2758 d->rel_hdr2->sh_link = t->symtab_section;
2759 d->rel_hdr2->sh_info = d->this_idx;
2762 switch (d->this_hdr.sh_type)
2766 /* A reloc section which we are treating as a normal BFD
2767 section. sh_link is the section index of the symbol
2768 table. sh_info is the section index of the section to
2769 which the relocation entries apply. We assume that an
2770 allocated reloc section uses the dynamic symbol table.
2771 FIXME: How can we be sure? */
2772 s = bfd_get_section_by_name (abfd, ".dynsym");
2774 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
2776 /* We look up the section the relocs apply to by name. */
2778 if (d->this_hdr.sh_type == SHT_REL)
2782 s = bfd_get_section_by_name (abfd, name);
2784 d->this_hdr.sh_info = elf_section_data (s)->this_idx;
2788 /* We assume that a section named .stab*str is a stabs
2789 string section. We look for a section with the same name
2790 but without the trailing ``str'', and set its sh_link
2791 field to point to this section. */
2792 if (strncmp (sec->name, ".stab", sizeof ".stab" - 1) == 0
2793 && strcmp (sec->name + strlen (sec->name) - 3, "str") == 0)
2798 len = strlen (sec->name);
2799 alc = bfd_malloc (len - 2);
2802 memcpy (alc, sec->name, len - 3);
2803 alc[len - 3] = '\0';
2804 s = bfd_get_section_by_name (abfd, alc);
2808 elf_section_data (s)->this_hdr.sh_link = d->this_idx;
2810 /* This is a .stab section. */
2811 if (elf_section_data (s)->this_hdr.sh_entsize == 0)
2812 elf_section_data (s)->this_hdr.sh_entsize
2813 = 4 + 2 * bfd_get_arch_size (abfd) / 8;
2820 case SHT_GNU_verneed:
2821 case SHT_GNU_verdef:
2822 /* sh_link is the section header index of the string table
2823 used for the dynamic entries, or the symbol table, or the
2825 s = bfd_get_section_by_name (abfd, ".dynstr");
2827 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
2831 case SHT_GNU_versym:
2832 /* sh_link is the section header index of the symbol table
2833 this hash table or version table is for. */
2834 s = bfd_get_section_by_name (abfd, ".dynsym");
2836 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
2840 d->this_hdr.sh_link = t->symtab_section;
2844 for (secn = 1; secn < section_number; ++secn)
2845 if (i_shdrp[secn] == NULL)
2846 i_shdrp[secn] = i_shdrp[0];
2848 i_shdrp[secn]->sh_name = _bfd_elf_strtab_offset (elf_shstrtab (abfd),
2849 i_shdrp[secn]->sh_name);
2853 /* Map symbol from it's internal number to the external number, moving
2854 all local symbols to be at the head of the list. */
2857 sym_is_global (bfd *abfd, asymbol *sym)
2859 /* If the backend has a special mapping, use it. */
2860 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2861 if (bed->elf_backend_sym_is_global)
2862 return (*bed->elf_backend_sym_is_global) (abfd, sym);
2864 return ((sym->flags & (BSF_GLOBAL | BSF_WEAK)) != 0
2865 || bfd_is_und_section (bfd_get_section (sym))
2866 || bfd_is_com_section (bfd_get_section (sym)));
2870 elf_map_symbols (bfd *abfd)
2872 unsigned int symcount = bfd_get_symcount (abfd);
2873 asymbol **syms = bfd_get_outsymbols (abfd);
2874 asymbol **sect_syms;
2875 unsigned int num_locals = 0;
2876 unsigned int num_globals = 0;
2877 unsigned int num_locals2 = 0;
2878 unsigned int num_globals2 = 0;
2886 fprintf (stderr, "elf_map_symbols\n");
2890 for (asect = abfd->sections; asect; asect = asect->next)
2892 if (max_index < asect->index)
2893 max_index = asect->index;
2897 amt = max_index * sizeof (asymbol *);
2898 sect_syms = bfd_zalloc (abfd, amt);
2899 if (sect_syms == NULL)
2901 elf_section_syms (abfd) = sect_syms;
2902 elf_num_section_syms (abfd) = max_index;
2904 /* Init sect_syms entries for any section symbols we have already
2905 decided to output. */
2906 for (idx = 0; idx < symcount; idx++)
2908 asymbol *sym = syms[idx];
2910 if ((sym->flags & BSF_SECTION_SYM) != 0
2917 if (sec->owner != NULL)
2919 if (sec->owner != abfd)
2921 if (sec->output_offset != 0)
2924 sec = sec->output_section;
2926 /* Empty sections in the input files may have had a
2927 section symbol created for them. (See the comment
2928 near the end of _bfd_generic_link_output_symbols in
2929 linker.c). If the linker script discards such
2930 sections then we will reach this point. Since we know
2931 that we cannot avoid this case, we detect it and skip
2932 the abort and the assignment to the sect_syms array.
2933 To reproduce this particular case try running the
2934 linker testsuite test ld-scripts/weak.exp for an ELF
2935 port that uses the generic linker. */
2936 if (sec->owner == NULL)
2939 BFD_ASSERT (sec->owner == abfd);
2941 sect_syms[sec->index] = syms[idx];
2946 /* Classify all of the symbols. */
2947 for (idx = 0; idx < symcount; idx++)
2949 if (!sym_is_global (abfd, syms[idx]))
2955 /* We will be adding a section symbol for each BFD section. Most normal
2956 sections will already have a section symbol in outsymbols, but
2957 eg. SHT_GROUP sections will not, and we need the section symbol mapped
2958 at least in that case. */
2959 for (asect = abfd->sections; asect; asect = asect->next)
2961 if (sect_syms[asect->index] == NULL)
2963 if (!sym_is_global (abfd, asect->symbol))
2970 /* Now sort the symbols so the local symbols are first. */
2971 amt = (num_locals + num_globals) * sizeof (asymbol *);
2972 new_syms = bfd_alloc (abfd, amt);
2974 if (new_syms == NULL)
2977 for (idx = 0; idx < symcount; idx++)
2979 asymbol *sym = syms[idx];
2982 if (!sym_is_global (abfd, sym))
2985 i = num_locals + num_globals2++;
2987 sym->udata.i = i + 1;
2989 for (asect = abfd->sections; asect; asect = asect->next)
2991 if (sect_syms[asect->index] == NULL)
2993 asymbol *sym = asect->symbol;
2996 sect_syms[asect->index] = sym;
2997 if (!sym_is_global (abfd, sym))
3000 i = num_locals + num_globals2++;
3002 sym->udata.i = i + 1;
3006 bfd_set_symtab (abfd, new_syms, num_locals + num_globals);
3008 elf_num_locals (abfd) = num_locals;
3009 elf_num_globals (abfd) = num_globals;
3013 /* Align to the maximum file alignment that could be required for any
3014 ELF data structure. */
3016 static inline file_ptr
3017 align_file_position (file_ptr off, int align)
3019 return (off + align - 1) & ~(align - 1);
3022 /* Assign a file position to a section, optionally aligning to the
3023 required section alignment. */
3026 _bfd_elf_assign_file_position_for_section (Elf_Internal_Shdr *i_shdrp,
3034 al = i_shdrp->sh_addralign;
3036 offset = BFD_ALIGN (offset, al);
3038 i_shdrp->sh_offset = offset;
3039 if (i_shdrp->bfd_section != NULL)
3040 i_shdrp->bfd_section->filepos = offset;
3041 if (i_shdrp->sh_type != SHT_NOBITS)
3042 offset += i_shdrp->sh_size;
3046 /* Compute the file positions we are going to put the sections at, and
3047 otherwise prepare to begin writing out the ELF file. If LINK_INFO
3048 is not NULL, this is being called by the ELF backend linker. */
3051 _bfd_elf_compute_section_file_positions (bfd *abfd,
3052 struct bfd_link_info *link_info)
3054 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3056 struct bfd_strtab_hash *strtab;
3057 Elf_Internal_Shdr *shstrtab_hdr;
3059 if (abfd->output_has_begun)
3062 /* Do any elf backend specific processing first. */
3063 if (bed->elf_backend_begin_write_processing)
3064 (*bed->elf_backend_begin_write_processing) (abfd, link_info);
3066 if (! prep_headers (abfd))
3069 /* Post process the headers if necessary. */
3070 if (bed->elf_backend_post_process_headers)
3071 (*bed->elf_backend_post_process_headers) (abfd, link_info);
3074 bfd_map_over_sections (abfd, elf_fake_sections, &failed);
3078 if (!assign_section_numbers (abfd))
3081 /* The backend linker builds symbol table information itself. */
3082 if (link_info == NULL && bfd_get_symcount (abfd) > 0)
3084 /* Non-zero if doing a relocatable link. */
3085 int relocatable_p = ! (abfd->flags & (EXEC_P | DYNAMIC));
3087 if (! swap_out_syms (abfd, &strtab, relocatable_p))
3091 if (link_info == NULL)
3093 bfd_map_over_sections (abfd, bfd_elf_set_group_contents, &failed);
3098 shstrtab_hdr = &elf_tdata (abfd)->shstrtab_hdr;
3099 /* sh_name was set in prep_headers. */
3100 shstrtab_hdr->sh_type = SHT_STRTAB;
3101 shstrtab_hdr->sh_flags = 0;
3102 shstrtab_hdr->sh_addr = 0;
3103 shstrtab_hdr->sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
3104 shstrtab_hdr->sh_entsize = 0;
3105 shstrtab_hdr->sh_link = 0;
3106 shstrtab_hdr->sh_info = 0;
3107 /* sh_offset is set in assign_file_positions_except_relocs. */
3108 shstrtab_hdr->sh_addralign = 1;
3110 if (!assign_file_positions_except_relocs (abfd, link_info))
3113 if (link_info == NULL && bfd_get_symcount (abfd) > 0)
3116 Elf_Internal_Shdr *hdr;
3118 off = elf_tdata (abfd)->next_file_pos;
3120 hdr = &elf_tdata (abfd)->symtab_hdr;
3121 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3123 hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
3124 if (hdr->sh_size != 0)
3125 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3127 hdr = &elf_tdata (abfd)->strtab_hdr;
3128 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3130 elf_tdata (abfd)->next_file_pos = off;
3132 /* Now that we know where the .strtab section goes, write it
3134 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
3135 || ! _bfd_stringtab_emit (abfd, strtab))
3137 _bfd_stringtab_free (strtab);
3140 abfd->output_has_begun = TRUE;
3145 /* Create a mapping from a set of sections to a program segment. */
3147 static struct elf_segment_map *
3148 make_mapping (bfd *abfd,
3149 asection **sections,
3154 struct elf_segment_map *m;
3159 amt = sizeof (struct elf_segment_map);
3160 amt += (to - from - 1) * sizeof (asection *);
3161 m = bfd_zalloc (abfd, amt);
3165 m->p_type = PT_LOAD;
3166 for (i = from, hdrpp = sections + from; i < to; i++, hdrpp++)
3167 m->sections[i - from] = *hdrpp;
3168 m->count = to - from;
3170 if (from == 0 && phdr)
3172 /* Include the headers in the first PT_LOAD segment. */
3173 m->includes_filehdr = 1;
3174 m->includes_phdrs = 1;
3180 /* Set up a mapping from BFD sections to program segments. */
3183 map_sections_to_segments (bfd *abfd)
3185 asection **sections = NULL;
3189 struct elf_segment_map *mfirst;
3190 struct elf_segment_map **pm;
3191 struct elf_segment_map *m;
3194 unsigned int phdr_index;
3195 bfd_vma maxpagesize;
3197 bfd_boolean phdr_in_segment = TRUE;
3198 bfd_boolean writable;
3200 asection *first_tls = NULL;
3201 asection *dynsec, *eh_frame_hdr;
3204 if (elf_tdata (abfd)->segment_map != NULL)
3207 if (bfd_count_sections (abfd) == 0)
3210 /* Select the allocated sections, and sort them. */
3212 amt = bfd_count_sections (abfd) * sizeof (asection *);
3213 sections = bfd_malloc (amt);
3214 if (sections == NULL)
3218 for (s = abfd->sections; s != NULL; s = s->next)
3220 if ((s->flags & SEC_ALLOC) != 0)
3226 BFD_ASSERT (i <= bfd_count_sections (abfd));
3229 qsort (sections, (size_t) count, sizeof (asection *), elf_sort_sections);
3231 /* Build the mapping. */
3236 /* If we have a .interp section, then create a PT_PHDR segment for
3237 the program headers and a PT_INTERP segment for the .interp
3239 s = bfd_get_section_by_name (abfd, ".interp");
3240 if (s != NULL && (s->flags & SEC_LOAD) != 0)
3242 amt = sizeof (struct elf_segment_map);
3243 m = bfd_zalloc (abfd, amt);
3247 m->p_type = PT_PHDR;
3248 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
3249 m->p_flags = PF_R | PF_X;
3250 m->p_flags_valid = 1;
3251 m->includes_phdrs = 1;
3256 amt = sizeof (struct elf_segment_map);
3257 m = bfd_zalloc (abfd, amt);
3261 m->p_type = PT_INTERP;
3269 /* Look through the sections. We put sections in the same program
3270 segment when the start of the second section can be placed within
3271 a few bytes of the end of the first section. */
3275 maxpagesize = get_elf_backend_data (abfd)->maxpagesize;
3277 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
3279 && (dynsec->flags & SEC_LOAD) == 0)
3282 /* Deal with -Ttext or something similar such that the first section
3283 is not adjacent to the program headers. This is an
3284 approximation, since at this point we don't know exactly how many
3285 program headers we will need. */
3288 bfd_size_type phdr_size;
3290 phdr_size = elf_tdata (abfd)->program_header_size;
3292 phdr_size = get_elf_backend_data (abfd)->s->sizeof_phdr;
3293 if ((abfd->flags & D_PAGED) == 0
3294 || sections[0]->lma < phdr_size
3295 || sections[0]->lma % maxpagesize < phdr_size % maxpagesize)
3296 phdr_in_segment = FALSE;
3299 for (i = 0, hdrpp = sections; i < count; i++, hdrpp++)
3302 bfd_boolean new_segment;
3306 /* See if this section and the last one will fit in the same
3309 if (last_hdr == NULL)
3311 /* If we don't have a segment yet, then we don't need a new
3312 one (we build the last one after this loop). */
3313 new_segment = FALSE;
3315 else if (last_hdr->lma - last_hdr->vma != hdr->lma - hdr->vma)
3317 /* If this section has a different relation between the
3318 virtual address and the load address, then we need a new
3322 else if (BFD_ALIGN (last_hdr->lma + last_size, maxpagesize)
3323 < BFD_ALIGN (hdr->lma, maxpagesize))
3325 /* If putting this section in this segment would force us to
3326 skip a page in the segment, then we need a new segment. */
3329 else if ((last_hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0
3330 && (hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) != 0)
3332 /* We don't want to put a loadable section after a
3333 nonloadable section in the same segment.
3334 Consider .tbss sections as loadable for this purpose. */
3337 else if ((abfd->flags & D_PAGED) == 0)
3339 /* If the file is not demand paged, which means that we
3340 don't require the sections to be correctly aligned in the
3341 file, then there is no other reason for a new segment. */
3342 new_segment = FALSE;
3345 && (hdr->flags & SEC_READONLY) == 0
3346 && (((last_hdr->lma + last_size - 1)
3347 & ~(maxpagesize - 1))
3348 != (hdr->lma & ~(maxpagesize - 1))))
3350 /* We don't want to put a writable section in a read only
3351 segment, unless they are on the same page in memory
3352 anyhow. We already know that the last section does not
3353 bring us past the current section on the page, so the
3354 only case in which the new section is not on the same
3355 page as the previous section is when the previous section
3356 ends precisely on a page boundary. */
3361 /* Otherwise, we can use the same segment. */
3362 new_segment = FALSE;
3367 if ((hdr->flags & SEC_READONLY) == 0)
3370 /* .tbss sections effectively have zero size. */
3371 if ((hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD)) != SEC_THREAD_LOCAL)
3372 last_size = hdr->_raw_size;
3378 /* We need a new program segment. We must create a new program
3379 header holding all the sections from phdr_index until hdr. */
3381 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
3388 if ((hdr->flags & SEC_READONLY) == 0)
3394 /* .tbss sections effectively have zero size. */
3395 if ((hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD)) != SEC_THREAD_LOCAL)
3396 last_size = hdr->_raw_size;
3400 phdr_in_segment = FALSE;
3403 /* Create a final PT_LOAD program segment. */
3404 if (last_hdr != NULL)
3406 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
3414 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
3417 amt = sizeof (struct elf_segment_map);
3418 m = bfd_zalloc (abfd, amt);
3422 m->p_type = PT_DYNAMIC;
3424 m->sections[0] = dynsec;
3430 /* For each loadable .note section, add a PT_NOTE segment. We don't
3431 use bfd_get_section_by_name, because if we link together
3432 nonloadable .note sections and loadable .note sections, we will
3433 generate two .note sections in the output file. FIXME: Using
3434 names for section types is bogus anyhow. */
3435 for (s = abfd->sections; s != NULL; s = s->next)
3437 if ((s->flags & SEC_LOAD) != 0
3438 && strncmp (s->name, ".note", 5) == 0)
3440 amt = sizeof (struct elf_segment_map);
3441 m = bfd_zalloc (abfd, amt);
3445 m->p_type = PT_NOTE;
3452 if (s->flags & SEC_THREAD_LOCAL)
3460 /* If there are any SHF_TLS output sections, add PT_TLS segment. */
3465 amt = sizeof (struct elf_segment_map);
3466 amt += (tls_count - 1) * sizeof (asection *);
3467 m = bfd_zalloc (abfd, amt);
3472 m->count = tls_count;
3473 /* Mandated PF_R. */
3475 m->p_flags_valid = 1;
3476 for (i = 0; i < tls_count; ++i)
3478 BFD_ASSERT (first_tls->flags & SEC_THREAD_LOCAL);
3479 m->sections[i] = first_tls;
3480 first_tls = first_tls->next;
3487 /* If there is a .eh_frame_hdr section, throw in a PT_GNU_EH_FRAME
3489 eh_frame_hdr = elf_tdata (abfd)->eh_frame_hdr;
3490 if (eh_frame_hdr != NULL
3491 && (eh_frame_hdr->output_section->flags & SEC_LOAD) != 0)
3493 amt = sizeof (struct elf_segment_map);
3494 m = bfd_zalloc (abfd, amt);
3498 m->p_type = PT_GNU_EH_FRAME;
3500 m->sections[0] = eh_frame_hdr->output_section;
3506 if (elf_tdata (abfd)->stack_flags)
3508 amt = sizeof (struct elf_segment_map);
3509 m = bfd_zalloc (abfd, amt);
3513 m->p_type = PT_GNU_STACK;
3514 m->p_flags = elf_tdata (abfd)->stack_flags;
3515 m->p_flags_valid = 1;
3524 elf_tdata (abfd)->segment_map = mfirst;
3528 if (sections != NULL)
3533 /* Sort sections by address. */
3536 elf_sort_sections (const void *arg1, const void *arg2)
3538 const asection *sec1 = *(const asection **) arg1;
3539 const asection *sec2 = *(const asection **) arg2;
3540 bfd_size_type size1, size2;
3542 /* Sort by LMA first, since this is the address used to
3543 place the section into a segment. */
3544 if (sec1->lma < sec2->lma)
3546 else if (sec1->lma > sec2->lma)
3549 /* Then sort by VMA. Normally the LMA and the VMA will be
3550 the same, and this will do nothing. */
3551 if (sec1->vma < sec2->vma)
3553 else if (sec1->vma > sec2->vma)
3556 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
3558 #define TOEND(x) (((x)->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0)
3564 /* If the indicies are the same, do not return 0
3565 here, but continue to try the next comparison. */
3566 if (sec1->target_index - sec2->target_index != 0)
3567 return sec1->target_index - sec2->target_index;
3572 else if (TOEND (sec2))
3577 /* Sort by size, to put zero sized sections
3578 before others at the same address. */
3580 size1 = (sec1->flags & SEC_LOAD) ? sec1->_raw_size : 0;
3581 size2 = (sec2->flags & SEC_LOAD) ? sec2->_raw_size : 0;
3588 return sec1->target_index - sec2->target_index;
3591 /* Ian Lance Taylor writes:
3593 We shouldn't be using % with a negative signed number. That's just
3594 not good. We have to make sure either that the number is not
3595 negative, or that the number has an unsigned type. When the types
3596 are all the same size they wind up as unsigned. When file_ptr is a
3597 larger signed type, the arithmetic winds up as signed long long,
3600 What we're trying to say here is something like ``increase OFF by
3601 the least amount that will cause it to be equal to the VMA modulo
3603 /* In other words, something like:
3605 vma_offset = m->sections[0]->vma % bed->maxpagesize;
3606 off_offset = off % bed->maxpagesize;
3607 if (vma_offset < off_offset)
3608 adjustment = vma_offset + bed->maxpagesize - off_offset;
3610 adjustment = vma_offset - off_offset;
3612 which can can be collapsed into the expression below. */
3615 vma_page_aligned_bias (bfd_vma vma, ufile_ptr off, bfd_vma maxpagesize)
3617 return ((vma - off) % maxpagesize);
3620 /* Assign file positions to the sections based on the mapping from
3621 sections to segments. This function also sets up some fields in
3622 the file header, and writes out the program headers. */
3625 assign_file_positions_for_segments (bfd *abfd, struct bfd_link_info *link_info)
3627 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3629 struct elf_segment_map *m;
3631 Elf_Internal_Phdr *phdrs;
3633 bfd_vma filehdr_vaddr, filehdr_paddr;
3634 bfd_vma phdrs_vaddr, phdrs_paddr;
3635 Elf_Internal_Phdr *p;
3638 if (elf_tdata (abfd)->segment_map == NULL)
3640 if (! map_sections_to_segments (abfd))
3645 /* The placement algorithm assumes that non allocated sections are
3646 not in PT_LOAD segments. We ensure this here by removing such
3647 sections from the segment map. */
3648 for (m = elf_tdata (abfd)->segment_map;
3652 unsigned int new_count;
3655 if (m->p_type != PT_LOAD)
3659 for (i = 0; i < m->count; i ++)
3661 if ((m->sections[i]->flags & SEC_ALLOC) != 0)
3664 m->sections[new_count] = m->sections[i];
3670 if (new_count != m->count)
3671 m->count = new_count;
3675 if (bed->elf_backend_modify_segment_map)
3677 if (! (*bed->elf_backend_modify_segment_map) (abfd, link_info))
3682 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
3685 elf_elfheader (abfd)->e_phoff = bed->s->sizeof_ehdr;
3686 elf_elfheader (abfd)->e_phentsize = bed->s->sizeof_phdr;
3687 elf_elfheader (abfd)->e_phnum = count;
3692 /* If we already counted the number of program segments, make sure
3693 that we allocated enough space. This happens when SIZEOF_HEADERS
3694 is used in a linker script. */
3695 alloc = elf_tdata (abfd)->program_header_size / bed->s->sizeof_phdr;
3696 if (alloc != 0 && count > alloc)
3698 ((*_bfd_error_handler)
3699 (_("%s: Not enough room for program headers (allocated %u, need %u)"),
3700 bfd_get_filename (abfd), alloc, count));
3701 bfd_set_error (bfd_error_bad_value);
3708 amt = alloc * sizeof (Elf_Internal_Phdr);
3709 phdrs = bfd_alloc (abfd, amt);
3713 off = bed->s->sizeof_ehdr;
3714 off += alloc * bed->s->sizeof_phdr;
3721 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
3728 /* If elf_segment_map is not from map_sections_to_segments, the
3729 sections may not be correctly ordered. NOTE: sorting should
3730 not be done to the PT_NOTE section of a corefile, which may
3731 contain several pseudo-sections artificially created by bfd.
3732 Sorting these pseudo-sections breaks things badly. */
3734 && !(elf_elfheader (abfd)->e_type == ET_CORE
3735 && m->p_type == PT_NOTE))
3736 qsort (m->sections, (size_t) m->count, sizeof (asection *),
3739 p->p_type = m->p_type;
3740 p->p_flags = m->p_flags;
3742 if (p->p_type == PT_LOAD
3744 && (m->sections[0]->flags & SEC_ALLOC) != 0)
3746 if ((abfd->flags & D_PAGED) != 0)
3747 off += vma_page_aligned_bias (m->sections[0]->vma, off,
3751 bfd_size_type align;
3754 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
3756 bfd_size_type secalign;
3758 secalign = bfd_get_section_alignment (abfd, *secpp);
3759 if (secalign > align)
3763 off += vma_page_aligned_bias (m->sections[0]->vma, off,
3771 p->p_vaddr = m->sections[0]->vma;
3773 if (m->p_paddr_valid)
3774 p->p_paddr = m->p_paddr;
3775 else if (m->count == 0)
3778 p->p_paddr = m->sections[0]->lma;
3780 if (p->p_type == PT_LOAD
3781 && (abfd->flags & D_PAGED) != 0)
3782 p->p_align = bed->maxpagesize;
3783 else if (m->count == 0)
3784 p->p_align = 1 << bed->s->log_file_align;
3792 if (m->includes_filehdr)
3794 if (! m->p_flags_valid)
3797 p->p_filesz = bed->s->sizeof_ehdr;
3798 p->p_memsz = bed->s->sizeof_ehdr;
3801 BFD_ASSERT (p->p_type == PT_LOAD);
3803 if (p->p_vaddr < (bfd_vma) off)
3805 (*_bfd_error_handler)
3806 (_("%s: Not enough room for program headers, try linking with -N"),
3807 bfd_get_filename (abfd));
3808 bfd_set_error (bfd_error_bad_value);
3813 if (! m->p_paddr_valid)
3816 if (p->p_type == PT_LOAD)
3818 filehdr_vaddr = p->p_vaddr;
3819 filehdr_paddr = p->p_paddr;
3823 if (m->includes_phdrs)
3825 if (! m->p_flags_valid)
3828 if (m->includes_filehdr)
3830 if (p->p_type == PT_LOAD)
3832 phdrs_vaddr = p->p_vaddr + bed->s->sizeof_ehdr;
3833 phdrs_paddr = p->p_paddr + bed->s->sizeof_ehdr;
3838 p->p_offset = bed->s->sizeof_ehdr;
3842 BFD_ASSERT (p->p_type == PT_LOAD);
3843 p->p_vaddr -= off - p->p_offset;
3844 if (! m->p_paddr_valid)
3845 p->p_paddr -= off - p->p_offset;
3848 if (p->p_type == PT_LOAD)
3850 phdrs_vaddr = p->p_vaddr;
3851 phdrs_paddr = p->p_paddr;
3854 phdrs_vaddr = bed->maxpagesize + bed->s->sizeof_ehdr;
3857 p->p_filesz += alloc * bed->s->sizeof_phdr;
3858 p->p_memsz += alloc * bed->s->sizeof_phdr;
3861 if (p->p_type == PT_LOAD
3862 || (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core))
3864 if (! m->includes_filehdr && ! m->includes_phdrs)
3870 adjust = off - (p->p_offset + p->p_filesz);
3871 p->p_filesz += adjust;
3872 p->p_memsz += adjust;
3878 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
3882 bfd_size_type align;
3886 align = 1 << bfd_get_section_alignment (abfd, sec);
3888 /* The section may have artificial alignment forced by a
3889 link script. Notice this case by the gap between the
3890 cumulative phdr lma and the section's lma. */
3891 if (p->p_paddr + p->p_memsz < sec->lma)
3893 bfd_vma adjust = sec->lma - (p->p_paddr + p->p_memsz);
3895 p->p_memsz += adjust;
3896 if (p->p_type == PT_LOAD
3897 || (p->p_type == PT_NOTE
3898 && bfd_get_format (abfd) == bfd_core))
3903 if ((flags & SEC_LOAD) != 0
3904 || (flags & SEC_THREAD_LOCAL) != 0)
3905 p->p_filesz += adjust;
3908 if (p->p_type == PT_LOAD)
3910 bfd_signed_vma adjust;
3912 if ((flags & SEC_LOAD) != 0)
3914 adjust = sec->lma - (p->p_paddr + p->p_memsz);
3918 else if ((flags & SEC_ALLOC) != 0)
3920 /* The section VMA must equal the file position
3921 modulo the page size. FIXME: I'm not sure if
3922 this adjustment is really necessary. We used to
3923 not have the SEC_LOAD case just above, and then
3924 this was necessary, but now I'm not sure. */
3925 if ((abfd->flags & D_PAGED) != 0)
3926 adjust = vma_page_aligned_bias (sec->vma, voff,
3929 adjust = vma_page_aligned_bias (sec->vma, voff,
3939 (* _bfd_error_handler) (_("\
3940 Error: First section in segment (%s) starts at 0x%x whereas the segment starts at 0x%x"),
3941 bfd_section_name (abfd, sec),
3946 p->p_memsz += adjust;
3949 if ((flags & SEC_LOAD) != 0)
3950 p->p_filesz += adjust;
3955 /* We check SEC_HAS_CONTENTS here because if NOLOAD is
3956 used in a linker script we may have a section with
3957 SEC_LOAD clear but which is supposed to have
3959 if ((flags & SEC_LOAD) != 0
3960 || (flags & SEC_HAS_CONTENTS) != 0)
3961 off += sec->_raw_size;
3963 if ((flags & SEC_ALLOC) != 0
3964 && ((flags & SEC_LOAD) != 0
3965 || (flags & SEC_THREAD_LOCAL) == 0))
3966 voff += sec->_raw_size;
3969 if (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core)
3971 /* The actual "note" segment has i == 0.
3972 This is the one that actually contains everything. */
3976 p->p_filesz = sec->_raw_size;
3977 off += sec->_raw_size;
3982 /* Fake sections -- don't need to be written. */
3985 flags = sec->flags = 0;
3992 if ((sec->flags & SEC_LOAD) != 0
3993 || (sec->flags & SEC_THREAD_LOCAL) == 0
3994 || p->p_type == PT_TLS)
3995 p->p_memsz += sec->_raw_size;
3997 if ((flags & SEC_LOAD) != 0)
3998 p->p_filesz += sec->_raw_size;
4000 if (p->p_type == PT_TLS
4001 && sec->_raw_size == 0
4002 && (sec->flags & SEC_HAS_CONTENTS) == 0)
4004 struct bfd_link_order *o;
4005 bfd_vma tbss_size = 0;
4007 for (o = sec->link_order_head; o != NULL; o = o->next)
4008 if (tbss_size < o->offset + o->size)
4009 tbss_size = o->offset + o->size;
4011 p->p_memsz += tbss_size;
4014 if (align > p->p_align
4015 && (p->p_type != PT_LOAD || (abfd->flags & D_PAGED) == 0))
4019 if (! m->p_flags_valid)
4022 if ((flags & SEC_CODE) != 0)
4024 if ((flags & SEC_READONLY) == 0)
4030 /* Now that we have set the section file positions, we can set up
4031 the file positions for the non PT_LOAD segments. */
4032 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
4036 if (p->p_type != PT_LOAD && m->count > 0)
4038 BFD_ASSERT (! m->includes_filehdr && ! m->includes_phdrs);
4039 p->p_offset = m->sections[0]->filepos;
4043 if (m->includes_filehdr)
4045 p->p_vaddr = filehdr_vaddr;
4046 if (! m->p_paddr_valid)
4047 p->p_paddr = filehdr_paddr;
4049 else if (m->includes_phdrs)
4051 p->p_vaddr = phdrs_vaddr;
4052 if (! m->p_paddr_valid)
4053 p->p_paddr = phdrs_paddr;
4058 /* Clear out any program headers we allocated but did not use. */
4059 for (; count < alloc; count++, p++)
4061 memset (p, 0, sizeof *p);
4062 p->p_type = PT_NULL;
4065 elf_tdata (abfd)->phdr = phdrs;
4067 elf_tdata (abfd)->next_file_pos = off;
4069 /* Write out the program headers. */
4070 if (bfd_seek (abfd, (bfd_signed_vma) bed->s->sizeof_ehdr, SEEK_SET) != 0
4071 || bed->s->write_out_phdrs (abfd, phdrs, alloc) != 0)
4077 /* Get the size of the program header.
4079 If this is called by the linker before any of the section VMA's are set, it
4080 can't calculate the correct value for a strange memory layout. This only
4081 happens when SIZEOF_HEADERS is used in a linker script. In this case,
4082 SORTED_HDRS is NULL and we assume the normal scenario of one text and one
4083 data segment (exclusive of .interp and .dynamic).
4085 ??? User written scripts must either not use SIZEOF_HEADERS, or assume there
4086 will be two segments. */
4088 static bfd_size_type
4089 get_program_header_size (bfd *abfd)
4093 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4095 /* We can't return a different result each time we're called. */
4096 if (elf_tdata (abfd)->program_header_size != 0)
4097 return elf_tdata (abfd)->program_header_size;
4099 if (elf_tdata (abfd)->segment_map != NULL)
4101 struct elf_segment_map *m;
4104 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
4106 elf_tdata (abfd)->program_header_size = segs * bed->s->sizeof_phdr;
4107 return elf_tdata (abfd)->program_header_size;
4110 /* Assume we will need exactly two PT_LOAD segments: one for text
4111 and one for data. */
4114 s = bfd_get_section_by_name (abfd, ".interp");
4115 if (s != NULL && (s->flags & SEC_LOAD) != 0)
4117 /* If we have a loadable interpreter section, we need a
4118 PT_INTERP segment. In this case, assume we also need a
4119 PT_PHDR segment, although that may not be true for all
4124 if (bfd_get_section_by_name (abfd, ".dynamic") != NULL)
4126 /* We need a PT_DYNAMIC segment. */
4130 if (elf_tdata (abfd)->eh_frame_hdr)
4132 /* We need a PT_GNU_EH_FRAME segment. */
4136 if (elf_tdata (abfd)->stack_flags)
4138 /* We need a PT_GNU_STACK segment. */
4142 for (s = abfd->sections; s != NULL; s = s->next)
4144 if ((s->flags & SEC_LOAD) != 0
4145 && strncmp (s->name, ".note", 5) == 0)
4147 /* We need a PT_NOTE segment. */
4152 for (s = abfd->sections; s != NULL; s = s->next)
4154 if (s->flags & SEC_THREAD_LOCAL)
4156 /* We need a PT_TLS segment. */
4162 /* Let the backend count up any program headers it might need. */
4163 if (bed->elf_backend_additional_program_headers)
4167 a = (*bed->elf_backend_additional_program_headers) (abfd);
4173 elf_tdata (abfd)->program_header_size = segs * bed->s->sizeof_phdr;
4174 return elf_tdata (abfd)->program_header_size;
4177 /* Work out the file positions of all the sections. This is called by
4178 _bfd_elf_compute_section_file_positions. All the section sizes and
4179 VMAs must be known before this is called.
4181 We do not consider reloc sections at this point, unless they form
4182 part of the loadable image. Reloc sections are assigned file
4183 positions in assign_file_positions_for_relocs, which is called by
4184 write_object_contents and final_link.
4186 We also don't set the positions of the .symtab and .strtab here. */
4189 assign_file_positions_except_relocs (bfd *abfd,
4190 struct bfd_link_info *link_info)
4192 struct elf_obj_tdata * const tdata = elf_tdata (abfd);
4193 Elf_Internal_Ehdr * const i_ehdrp = elf_elfheader (abfd);
4194 Elf_Internal_Shdr ** const i_shdrpp = elf_elfsections (abfd);
4195 unsigned int num_sec = elf_numsections (abfd);
4197 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4199 if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0
4200 && bfd_get_format (abfd) != bfd_core)
4202 Elf_Internal_Shdr **hdrpp;
4205 /* Start after the ELF header. */
4206 off = i_ehdrp->e_ehsize;
4208 /* We are not creating an executable, which means that we are
4209 not creating a program header, and that the actual order of
4210 the sections in the file is unimportant. */
4211 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
4213 Elf_Internal_Shdr *hdr;
4216 if (hdr->sh_type == SHT_REL
4217 || hdr->sh_type == SHT_RELA
4218 || i == tdata->symtab_section
4219 || i == tdata->symtab_shndx_section
4220 || i == tdata->strtab_section)
4222 hdr->sh_offset = -1;
4225 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4227 if (i == SHN_LORESERVE - 1)
4229 i += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4230 hdrpp += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4237 Elf_Internal_Shdr **hdrpp;
4239 /* Assign file positions for the loaded sections based on the
4240 assignment of sections to segments. */
4241 if (! assign_file_positions_for_segments (abfd, link_info))
4244 /* Assign file positions for the other sections. */
4246 off = elf_tdata (abfd)->next_file_pos;
4247 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
4249 Elf_Internal_Shdr *hdr;
4252 if (hdr->bfd_section != NULL
4253 && hdr->bfd_section->filepos != 0)
4254 hdr->sh_offset = hdr->bfd_section->filepos;
4255 else if ((hdr->sh_flags & SHF_ALLOC) != 0)
4257 ((*_bfd_error_handler)
4258 (_("%s: warning: allocated section `%s' not in segment"),
4259 bfd_get_filename (abfd),
4260 (hdr->bfd_section == NULL
4262 : hdr->bfd_section->name)));
4263 if ((abfd->flags & D_PAGED) != 0)
4264 off += vma_page_aligned_bias (hdr->sh_addr, off,
4267 off += vma_page_aligned_bias (hdr->sh_addr, off,
4269 off = _bfd_elf_assign_file_position_for_section (hdr, off,
4272 else if (hdr == i_shdrpp[tdata->symtab_section]
4273 || hdr == i_shdrpp[tdata->symtab_shndx_section]
4274 || hdr == i_shdrpp[tdata->strtab_section])
4275 hdr->sh_offset = -1;
4277 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4279 if (i == SHN_LORESERVE - 1)
4281 i += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4282 hdrpp += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4287 /* Place the section headers. */
4288 off = align_file_position (off, 1 << bed->s->log_file_align);
4289 i_ehdrp->e_shoff = off;
4290 off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize;
4292 elf_tdata (abfd)->next_file_pos = off;
4298 prep_headers (bfd *abfd)
4300 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
4301 Elf_Internal_Phdr *i_phdrp = 0; /* Program header table, internal form */
4302 Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */
4303 struct elf_strtab_hash *shstrtab;
4304 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4306 i_ehdrp = elf_elfheader (abfd);
4307 i_shdrp = elf_elfsections (abfd);
4309 shstrtab = _bfd_elf_strtab_init ();
4310 if (shstrtab == NULL)
4313 elf_shstrtab (abfd) = shstrtab;
4315 i_ehdrp->e_ident[EI_MAG0] = ELFMAG0;
4316 i_ehdrp->e_ident[EI_MAG1] = ELFMAG1;
4317 i_ehdrp->e_ident[EI_MAG2] = ELFMAG2;
4318 i_ehdrp->e_ident[EI_MAG3] = ELFMAG3;
4320 i_ehdrp->e_ident[EI_CLASS] = bed->s->elfclass;
4321 i_ehdrp->e_ident[EI_DATA] =
4322 bfd_big_endian (abfd) ? ELFDATA2MSB : ELFDATA2LSB;
4323 i_ehdrp->e_ident[EI_VERSION] = bed->s->ev_current;
4325 i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_FREEBSD;
4327 if ((abfd->flags & DYNAMIC) != 0)
4328 i_ehdrp->e_type = ET_DYN;
4329 else if ((abfd->flags & EXEC_P) != 0)
4330 i_ehdrp->e_type = ET_EXEC;
4331 else if (bfd_get_format (abfd) == bfd_core)
4332 i_ehdrp->e_type = ET_CORE;
4334 i_ehdrp->e_type = ET_REL;
4336 switch (bfd_get_arch (abfd))
4338 case bfd_arch_unknown:
4339 i_ehdrp->e_machine = EM_NONE;
4342 /* There used to be a long list of cases here, each one setting
4343 e_machine to the same EM_* macro #defined as ELF_MACHINE_CODE
4344 in the corresponding bfd definition. To avoid duplication,
4345 the switch was removed. Machines that need special handling
4346 can generally do it in elf_backend_final_write_processing(),
4347 unless they need the information earlier than the final write.
4348 Such need can generally be supplied by replacing the tests for
4349 e_machine with the conditions used to determine it. */
4351 i_ehdrp->e_machine = bed->elf_machine_code;
4354 i_ehdrp->e_version = bed->s->ev_current;
4355 i_ehdrp->e_ehsize = bed->s->sizeof_ehdr;
4357 /* No program header, for now. */
4358 i_ehdrp->e_phoff = 0;
4359 i_ehdrp->e_phentsize = 0;
4360 i_ehdrp->e_phnum = 0;
4362 /* Each bfd section is section header entry. */
4363 i_ehdrp->e_entry = bfd_get_start_address (abfd);
4364 i_ehdrp->e_shentsize = bed->s->sizeof_shdr;
4366 /* If we're building an executable, we'll need a program header table. */
4367 if (abfd->flags & EXEC_P)
4369 /* It all happens later. */
4371 i_ehdrp->e_phentsize = sizeof (Elf_External_Phdr);
4373 /* elf_build_phdrs() returns a (NULL-terminated) array of
4374 Elf_Internal_Phdrs. */
4375 i_phdrp = elf_build_phdrs (abfd, i_ehdrp, i_shdrp, &i_ehdrp->e_phnum);
4376 i_ehdrp->e_phoff = outbase;
4377 outbase += i_ehdrp->e_phentsize * i_ehdrp->e_phnum;
4382 i_ehdrp->e_phentsize = 0;
4384 i_ehdrp->e_phoff = 0;
4387 elf_tdata (abfd)->symtab_hdr.sh_name =
4388 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".symtab", FALSE);
4389 elf_tdata (abfd)->strtab_hdr.sh_name =
4390 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".strtab", FALSE);
4391 elf_tdata (abfd)->shstrtab_hdr.sh_name =
4392 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".shstrtab", FALSE);
4393 if (elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
4394 || elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
4395 || elf_tdata (abfd)->shstrtab_hdr.sh_name == (unsigned int) -1)
4401 /* Assign file positions for all the reloc sections which are not part
4402 of the loadable file image. */
4405 _bfd_elf_assign_file_positions_for_relocs (bfd *abfd)
4408 unsigned int i, num_sec;
4409 Elf_Internal_Shdr **shdrpp;
4411 off = elf_tdata (abfd)->next_file_pos;
4413 num_sec = elf_numsections (abfd);
4414 for (i = 1, shdrpp = elf_elfsections (abfd) + 1; i < num_sec; i++, shdrpp++)
4416 Elf_Internal_Shdr *shdrp;
4419 if ((shdrp->sh_type == SHT_REL || shdrp->sh_type == SHT_RELA)
4420 && shdrp->sh_offset == -1)
4421 off = _bfd_elf_assign_file_position_for_section (shdrp, off, TRUE);
4424 elf_tdata (abfd)->next_file_pos = off;
4428 _bfd_elf_write_object_contents (bfd *abfd)
4430 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4431 Elf_Internal_Ehdr *i_ehdrp;
4432 Elf_Internal_Shdr **i_shdrp;
4434 unsigned int count, num_sec;
4436 if (! abfd->output_has_begun
4437 && ! _bfd_elf_compute_section_file_positions (abfd, NULL))
4440 i_shdrp = elf_elfsections (abfd);
4441 i_ehdrp = elf_elfheader (abfd);
4444 bfd_map_over_sections (abfd, bed->s->write_relocs, &failed);
4448 _bfd_elf_assign_file_positions_for_relocs (abfd);
4450 /* After writing the headers, we need to write the sections too... */
4451 num_sec = elf_numsections (abfd);
4452 for (count = 1; count < num_sec; count++)
4454 if (bed->elf_backend_section_processing)
4455 (*bed->elf_backend_section_processing) (abfd, i_shdrp[count]);
4456 if (i_shdrp[count]->contents)
4458 bfd_size_type amt = i_shdrp[count]->sh_size;
4460 if (bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET) != 0
4461 || bfd_bwrite (i_shdrp[count]->contents, amt, abfd) != amt)
4464 if (count == SHN_LORESERVE - 1)
4465 count += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4468 /* Write out the section header names. */
4469 if (bfd_seek (abfd, elf_tdata (abfd)->shstrtab_hdr.sh_offset, SEEK_SET) != 0
4470 || ! _bfd_elf_strtab_emit (abfd, elf_shstrtab (abfd)))
4473 if (bed->elf_backend_final_write_processing)
4474 (*bed->elf_backend_final_write_processing) (abfd,
4475 elf_tdata (abfd)->linker);
4477 return bed->s->write_shdrs_and_ehdr (abfd);
4481 _bfd_elf_write_corefile_contents (bfd *abfd)
4483 /* Hopefully this can be done just like an object file. */
4484 return _bfd_elf_write_object_contents (abfd);
4487 /* Given a section, search the header to find them. */
4490 _bfd_elf_section_from_bfd_section (bfd *abfd, struct bfd_section *asect)
4492 const struct elf_backend_data *bed;
4495 if (elf_section_data (asect) != NULL
4496 && elf_section_data (asect)->this_idx != 0)
4497 return elf_section_data (asect)->this_idx;
4499 if (bfd_is_abs_section (asect))
4501 else if (bfd_is_com_section (asect))
4503 else if (bfd_is_und_section (asect))
4507 Elf_Internal_Shdr **i_shdrp = elf_elfsections (abfd);
4508 int maxindex = elf_numsections (abfd);
4510 for (index = 1; index < maxindex; index++)
4512 Elf_Internal_Shdr *hdr = i_shdrp[index];
4514 if (hdr != NULL && hdr->bfd_section == asect)
4520 bed = get_elf_backend_data (abfd);
4521 if (bed->elf_backend_section_from_bfd_section)
4525 if ((*bed->elf_backend_section_from_bfd_section) (abfd, asect, &retval))
4530 bfd_set_error (bfd_error_nonrepresentable_section);
4535 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
4539 _bfd_elf_symbol_from_bfd_symbol (bfd *abfd, asymbol **asym_ptr_ptr)
4541 asymbol *asym_ptr = *asym_ptr_ptr;
4543 flagword flags = asym_ptr->flags;
4545 /* When gas creates relocations against local labels, it creates its
4546 own symbol for the section, but does put the symbol into the
4547 symbol chain, so udata is 0. When the linker is generating
4548 relocatable output, this section symbol may be for one of the
4549 input sections rather than the output section. */
4550 if (asym_ptr->udata.i == 0
4551 && (flags & BSF_SECTION_SYM)
4552 && asym_ptr->section)
4556 if (asym_ptr->section->output_section != NULL)
4557 indx = asym_ptr->section->output_section->index;
4559 indx = asym_ptr->section->index;
4560 if (indx < elf_num_section_syms (abfd)
4561 && elf_section_syms (abfd)[indx] != NULL)
4562 asym_ptr->udata.i = elf_section_syms (abfd)[indx]->udata.i;
4565 idx = asym_ptr->udata.i;
4569 /* This case can occur when using --strip-symbol on a symbol
4570 which is used in a relocation entry. */
4571 (*_bfd_error_handler)
4572 (_("%s: symbol `%s' required but not present"),
4573 bfd_archive_filename (abfd), bfd_asymbol_name (asym_ptr));
4574 bfd_set_error (bfd_error_no_symbols);
4581 "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n",
4582 (long) asym_ptr, asym_ptr->name, idx, flags,
4583 elf_symbol_flags (flags));
4591 /* Copy private BFD data. This copies any program header information. */
4594 copy_private_bfd_data (bfd *ibfd, bfd *obfd)
4596 Elf_Internal_Ehdr *iehdr;
4597 struct elf_segment_map *map;
4598 struct elf_segment_map *map_first;
4599 struct elf_segment_map **pointer_to_map;
4600 Elf_Internal_Phdr *segment;
4603 unsigned int num_segments;
4604 bfd_boolean phdr_included = FALSE;
4605 bfd_vma maxpagesize;
4606 struct elf_segment_map *phdr_adjust_seg = NULL;
4607 unsigned int phdr_adjust_num = 0;
4608 const struct elf_backend_data *bed;
4610 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
4611 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
4614 if (elf_tdata (ibfd)->phdr == NULL)
4617 bed = get_elf_backend_data (ibfd);
4618 iehdr = elf_elfheader (ibfd);
4621 pointer_to_map = &map_first;
4623 num_segments = elf_elfheader (ibfd)->e_phnum;
4624 maxpagesize = get_elf_backend_data (obfd)->maxpagesize;
4626 /* Returns the end address of the segment + 1. */
4627 #define SEGMENT_END(segment, start) \
4628 (start + (segment->p_memsz > segment->p_filesz \
4629 ? segment->p_memsz : segment->p_filesz))
4631 #define SECTION_SIZE(section, segment) \
4632 (((section->flags & (SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) \
4633 != SEC_THREAD_LOCAL || segment->p_type == PT_TLS) \
4634 ? section->_raw_size : 0)
4636 /* Returns TRUE if the given section is contained within
4637 the given segment. VMA addresses are compared. */
4638 #define IS_CONTAINED_BY_VMA(section, segment) \
4639 (section->vma >= segment->p_vaddr \
4640 && (section->vma + SECTION_SIZE (section, segment) \
4641 <= (SEGMENT_END (segment, segment->p_vaddr))))
4643 /* Returns TRUE if the given section is contained within
4644 the given segment. LMA addresses are compared. */
4645 #define IS_CONTAINED_BY_LMA(section, segment, base) \
4646 (section->lma >= base \
4647 && (section->lma + SECTION_SIZE (section, segment) \
4648 <= SEGMENT_END (segment, base)))
4650 /* Special case: corefile "NOTE" section containing regs, prpsinfo etc. */
4651 #define IS_COREFILE_NOTE(p, s) \
4652 (p->p_type == PT_NOTE \
4653 && bfd_get_format (ibfd) == bfd_core \
4654 && s->vma == 0 && s->lma == 0 \
4655 && (bfd_vma) s->filepos >= p->p_offset \
4656 && ((bfd_vma) s->filepos + s->_raw_size \
4657 <= p->p_offset + p->p_filesz))
4659 /* The complicated case when p_vaddr is 0 is to handle the Solaris
4660 linker, which generates a PT_INTERP section with p_vaddr and
4661 p_memsz set to 0. */
4662 #define IS_SOLARIS_PT_INTERP(p, s) \
4664 && p->p_paddr == 0 \
4665 && p->p_memsz == 0 \
4666 && p->p_filesz > 0 \
4667 && (s->flags & SEC_HAS_CONTENTS) != 0 \
4668 && s->_raw_size > 0 \
4669 && (bfd_vma) s->filepos >= p->p_offset \
4670 && ((bfd_vma) s->filepos + s->_raw_size \
4671 <= p->p_offset + p->p_filesz))
4673 /* Decide if the given section should be included in the given segment.
4674 A section will be included if:
4675 1. It is within the address space of the segment -- we use the LMA
4676 if that is set for the segment and the VMA otherwise,
4677 2. It is an allocated segment,
4678 3. There is an output section associated with it,
4679 4. The section has not already been allocated to a previous segment.
4680 5. PT_GNU_STACK segments do not include any sections.
4681 6. PT_TLS segment includes only SHF_TLS sections.
4682 7. SHF_TLS sections are only in PT_TLS or PT_LOAD segments. */
4683 #define INCLUDE_SECTION_IN_SEGMENT(section, segment, bed) \
4684 ((((segment->p_paddr \
4685 ? IS_CONTAINED_BY_LMA (section, segment, segment->p_paddr) \
4686 : IS_CONTAINED_BY_VMA (section, segment)) \
4687 && (section->flags & SEC_ALLOC) != 0) \
4688 || IS_COREFILE_NOTE (segment, section)) \
4689 && section->output_section != NULL \
4690 && segment->p_type != PT_GNU_STACK \
4691 && (segment->p_type != PT_TLS \
4692 || (section->flags & SEC_THREAD_LOCAL)) \
4693 && (segment->p_type == PT_LOAD \
4694 || segment->p_type == PT_TLS \
4695 || (section->flags & SEC_THREAD_LOCAL) == 0) \
4696 && ! section->segment_mark)
4698 /* Returns TRUE iff seg1 starts after the end of seg2. */
4699 #define SEGMENT_AFTER_SEGMENT(seg1, seg2, field) \
4700 (seg1->field >= SEGMENT_END (seg2, seg2->field))
4702 /* Returns TRUE iff seg1 and seg2 overlap. Segments overlap iff both
4703 their VMA address ranges and their LMA address ranges overlap.
4704 It is possible to have overlapping VMA ranges without overlapping LMA
4705 ranges. RedBoot images for example can have both .data and .bss mapped
4706 to the same VMA range, but with the .data section mapped to a different
4708 #define SEGMENT_OVERLAPS(seg1, seg2) \
4709 ( !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_vaddr) \
4710 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_vaddr)) \
4711 && !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_paddr) \
4712 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_paddr)))
4714 /* Initialise the segment mark field. */
4715 for (section = ibfd->sections; section != NULL; section = section->next)
4716 section->segment_mark = FALSE;
4718 /* Scan through the segments specified in the program header
4719 of the input BFD. For this first scan we look for overlaps
4720 in the loadable segments. These can be created by weird
4721 parameters to objcopy. Also, fix some solaris weirdness. */
4722 for (i = 0, segment = elf_tdata (ibfd)->phdr;
4727 Elf_Internal_Phdr *segment2;
4729 if (segment->p_type == PT_INTERP)
4730 for (section = ibfd->sections; section; section = section->next)
4731 if (IS_SOLARIS_PT_INTERP (segment, section))
4733 /* Mininal change so that the normal section to segment
4734 assignment code will work. */
4735 segment->p_vaddr = section->vma;
4739 if (segment->p_type != PT_LOAD)
4742 /* Determine if this segment overlaps any previous segments. */
4743 for (j = 0, segment2 = elf_tdata (ibfd)->phdr; j < i; j++, segment2 ++)
4745 bfd_signed_vma extra_length;
4747 if (segment2->p_type != PT_LOAD
4748 || ! SEGMENT_OVERLAPS (segment, segment2))
4751 /* Merge the two segments together. */
4752 if (segment2->p_vaddr < segment->p_vaddr)
4754 /* Extend SEGMENT2 to include SEGMENT and then delete
4757 SEGMENT_END (segment, segment->p_vaddr)
4758 - SEGMENT_END (segment2, segment2->p_vaddr);
4760 if (extra_length > 0)
4762 segment2->p_memsz += extra_length;
4763 segment2->p_filesz += extra_length;
4766 segment->p_type = PT_NULL;
4768 /* Since we have deleted P we must restart the outer loop. */
4770 segment = elf_tdata (ibfd)->phdr;
4775 /* Extend SEGMENT to include SEGMENT2 and then delete
4778 SEGMENT_END (segment2, segment2->p_vaddr)
4779 - SEGMENT_END (segment, segment->p_vaddr);
4781 if (extra_length > 0)
4783 segment->p_memsz += extra_length;
4784 segment->p_filesz += extra_length;
4787 segment2->p_type = PT_NULL;
4792 /* The second scan attempts to assign sections to segments. */
4793 for (i = 0, segment = elf_tdata (ibfd)->phdr;
4797 unsigned int section_count;
4798 asection ** sections;
4799 asection * output_section;
4801 bfd_vma matching_lma;
4802 bfd_vma suggested_lma;
4806 if (segment->p_type == PT_NULL)
4809 /* Compute how many sections might be placed into this segment. */
4810 for (section = ibfd->sections, section_count = 0;
4812 section = section->next)
4813 if (INCLUDE_SECTION_IN_SEGMENT (section, segment, bed))
4816 /* Allocate a segment map big enough to contain
4817 all of the sections we have selected. */
4818 amt = sizeof (struct elf_segment_map);
4819 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
4820 map = bfd_alloc (obfd, amt);
4824 /* Initialise the fields of the segment map. Default to
4825 using the physical address of the segment in the input BFD. */
4827 map->p_type = segment->p_type;
4828 map->p_flags = segment->p_flags;
4829 map->p_flags_valid = 1;
4830 map->p_paddr = segment->p_paddr;
4831 map->p_paddr_valid = 1;
4833 /* Determine if this segment contains the ELF file header
4834 and if it contains the program headers themselves. */
4835 map->includes_filehdr = (segment->p_offset == 0
4836 && segment->p_filesz >= iehdr->e_ehsize);
4838 map->includes_phdrs = 0;
4840 if (! phdr_included || segment->p_type != PT_LOAD)
4842 map->includes_phdrs =
4843 (segment->p_offset <= (bfd_vma) iehdr->e_phoff
4844 && (segment->p_offset + segment->p_filesz
4845 >= ((bfd_vma) iehdr->e_phoff
4846 + iehdr->e_phnum * iehdr->e_phentsize)));
4848 if (segment->p_type == PT_LOAD && map->includes_phdrs)
4849 phdr_included = TRUE;
4852 if (section_count == 0)
4854 /* Special segments, such as the PT_PHDR segment, may contain
4855 no sections, but ordinary, loadable segments should contain
4856 something. They are allowed by the ELF spec however, so only
4857 a warning is produced. */
4858 if (segment->p_type == PT_LOAD)
4859 (*_bfd_error_handler)
4860 (_("%s: warning: Empty loadable segment detected, is this intentional ?\n"),
4861 bfd_archive_filename (ibfd));
4864 *pointer_to_map = map;
4865 pointer_to_map = &map->next;
4870 /* Now scan the sections in the input BFD again and attempt
4871 to add their corresponding output sections to the segment map.
4872 The problem here is how to handle an output section which has
4873 been moved (ie had its LMA changed). There are four possibilities:
4875 1. None of the sections have been moved.
4876 In this case we can continue to use the segment LMA from the
4879 2. All of the sections have been moved by the same amount.
4880 In this case we can change the segment's LMA to match the LMA
4881 of the first section.
4883 3. Some of the sections have been moved, others have not.
4884 In this case those sections which have not been moved can be
4885 placed in the current segment which will have to have its size,
4886 and possibly its LMA changed, and a new segment or segments will
4887 have to be created to contain the other sections.
4889 4. The sections have been moved, but not by the same amount.
4890 In this case we can change the segment's LMA to match the LMA
4891 of the first section and we will have to create a new segment
4892 or segments to contain the other sections.
4894 In order to save time, we allocate an array to hold the section
4895 pointers that we are interested in. As these sections get assigned
4896 to a segment, they are removed from this array. */
4898 /* Gcc 2.96 miscompiles this code on mips. Don't do casting here
4899 to work around this long long bug. */
4900 amt = section_count * sizeof (asection *);
4901 sections = bfd_malloc (amt);
4902 if (sections == NULL)
4905 /* Step One: Scan for segment vs section LMA conflicts.
4906 Also add the sections to the section array allocated above.
4907 Also add the sections to the current segment. In the common
4908 case, where the sections have not been moved, this means that
4909 we have completely filled the segment, and there is nothing
4915 for (j = 0, section = ibfd->sections;
4917 section = section->next)
4919 if (INCLUDE_SECTION_IN_SEGMENT (section, segment, bed))
4921 output_section = section->output_section;
4923 sections[j ++] = section;
4925 /* The Solaris native linker always sets p_paddr to 0.
4926 We try to catch that case here, and set it to the
4927 correct value. Note - some backends require that
4928 p_paddr be left as zero. */
4929 if (segment->p_paddr == 0
4930 && segment->p_vaddr != 0
4931 && (! bed->want_p_paddr_set_to_zero)
4933 && output_section->lma != 0
4934 && (output_section->vma == (segment->p_vaddr
4935 + (map->includes_filehdr
4938 + (map->includes_phdrs
4940 * iehdr->e_phentsize)
4942 map->p_paddr = segment->p_vaddr;
4944 /* Match up the physical address of the segment with the
4945 LMA address of the output section. */
4946 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
4947 || IS_COREFILE_NOTE (segment, section)
4948 || (bed->want_p_paddr_set_to_zero &&
4949 IS_CONTAINED_BY_VMA (output_section, segment))
4952 if (matching_lma == 0)
4953 matching_lma = output_section->lma;
4955 /* We assume that if the section fits within the segment
4956 then it does not overlap any other section within that
4958 map->sections[isec ++] = output_section;
4960 else if (suggested_lma == 0)
4961 suggested_lma = output_section->lma;
4965 BFD_ASSERT (j == section_count);
4967 /* Step Two: Adjust the physical address of the current segment,
4969 if (isec == section_count)
4971 /* All of the sections fitted within the segment as currently
4972 specified. This is the default case. Add the segment to
4973 the list of built segments and carry on to process the next
4974 program header in the input BFD. */
4975 map->count = section_count;
4976 *pointer_to_map = map;
4977 pointer_to_map = &map->next;
4984 if (matching_lma != 0)
4986 /* At least one section fits inside the current segment.
4987 Keep it, but modify its physical address to match the
4988 LMA of the first section that fitted. */
4989 map->p_paddr = matching_lma;
4993 /* None of the sections fitted inside the current segment.
4994 Change the current segment's physical address to match
4995 the LMA of the first section. */
4996 map->p_paddr = suggested_lma;
4999 /* Offset the segment physical address from the lma
5000 to allow for space taken up by elf headers. */
5001 if (map->includes_filehdr)
5002 map->p_paddr -= iehdr->e_ehsize;
5004 if (map->includes_phdrs)
5006 map->p_paddr -= iehdr->e_phnum * iehdr->e_phentsize;
5008 /* iehdr->e_phnum is just an estimate of the number
5009 of program headers that we will need. Make a note
5010 here of the number we used and the segment we chose
5011 to hold these headers, so that we can adjust the
5012 offset when we know the correct value. */
5013 phdr_adjust_num = iehdr->e_phnum;
5014 phdr_adjust_seg = map;
5018 /* Step Three: Loop over the sections again, this time assigning
5019 those that fit to the current segment and removing them from the
5020 sections array; but making sure not to leave large gaps. Once all
5021 possible sections have been assigned to the current segment it is
5022 added to the list of built segments and if sections still remain
5023 to be assigned, a new segment is constructed before repeating
5031 /* Fill the current segment with sections that fit. */
5032 for (j = 0; j < section_count; j++)
5034 section = sections[j];
5036 if (section == NULL)
5039 output_section = section->output_section;
5041 BFD_ASSERT (output_section != NULL);
5043 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
5044 || IS_COREFILE_NOTE (segment, section))
5046 if (map->count == 0)
5048 /* If the first section in a segment does not start at
5049 the beginning of the segment, then something is
5051 if (output_section->lma !=
5053 + (map->includes_filehdr ? iehdr->e_ehsize : 0)
5054 + (map->includes_phdrs
5055 ? iehdr->e_phnum * iehdr->e_phentsize
5061 asection * prev_sec;
5063 prev_sec = map->sections[map->count - 1];
5065 /* If the gap between the end of the previous section
5066 and the start of this section is more than
5067 maxpagesize then we need to start a new segment. */
5068 if ((BFD_ALIGN (prev_sec->lma + prev_sec->_raw_size,
5070 < BFD_ALIGN (output_section->lma, maxpagesize))
5071 || ((prev_sec->lma + prev_sec->_raw_size)
5072 > output_section->lma))
5074 if (suggested_lma == 0)
5075 suggested_lma = output_section->lma;
5081 map->sections[map->count++] = output_section;
5084 section->segment_mark = TRUE;
5086 else if (suggested_lma == 0)
5087 suggested_lma = output_section->lma;
5090 BFD_ASSERT (map->count > 0);
5092 /* Add the current segment to the list of built segments. */
5093 *pointer_to_map = map;
5094 pointer_to_map = &map->next;
5096 if (isec < section_count)
5098 /* We still have not allocated all of the sections to
5099 segments. Create a new segment here, initialise it
5100 and carry on looping. */
5101 amt = sizeof (struct elf_segment_map);
5102 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
5103 map = bfd_alloc (obfd, amt);
5110 /* Initialise the fields of the segment map. Set the physical
5111 physical address to the LMA of the first section that has
5112 not yet been assigned. */
5114 map->p_type = segment->p_type;
5115 map->p_flags = segment->p_flags;
5116 map->p_flags_valid = 1;
5117 map->p_paddr = suggested_lma;
5118 map->p_paddr_valid = 1;
5119 map->includes_filehdr = 0;
5120 map->includes_phdrs = 0;
5123 while (isec < section_count);
5128 /* The Solaris linker creates program headers in which all the
5129 p_paddr fields are zero. When we try to objcopy or strip such a
5130 file, we get confused. Check for this case, and if we find it
5131 reset the p_paddr_valid fields. */
5132 for (map = map_first; map != NULL; map = map->next)
5133 if (map->p_paddr != 0)
5136 for (map = map_first; map != NULL; map = map->next)
5137 map->p_paddr_valid = 0;
5139 elf_tdata (obfd)->segment_map = map_first;
5141 /* If we had to estimate the number of program headers that were
5142 going to be needed, then check our estimate now and adjust
5143 the offset if necessary. */
5144 if (phdr_adjust_seg != NULL)
5148 for (count = 0, map = map_first; map != NULL; map = map->next)
5151 if (count > phdr_adjust_num)
5152 phdr_adjust_seg->p_paddr
5153 -= (count - phdr_adjust_num) * iehdr->e_phentsize;
5157 /* Final Step: Sort the segments into ascending order of physical
5159 if (map_first != NULL)
5161 struct elf_segment_map *prev;
5164 for (map = map_first->next; map != NULL; prev = map, map = map->next)
5166 /* Yes I know - its a bubble sort.... */
5167 if (map->next != NULL && (map->next->p_paddr < map->p_paddr))
5169 /* Swap map and map->next. */
5170 prev->next = map->next;
5171 map->next = map->next->next;
5172 prev->next->next = map;
5183 #undef IS_CONTAINED_BY_VMA
5184 #undef IS_CONTAINED_BY_LMA
5185 #undef IS_COREFILE_NOTE
5186 #undef IS_SOLARIS_PT_INTERP
5187 #undef INCLUDE_SECTION_IN_SEGMENT
5188 #undef SEGMENT_AFTER_SEGMENT
5189 #undef SEGMENT_OVERLAPS
5193 /* Copy private section information. This copies over the entsize
5194 field, and sometimes the info field. */
5197 _bfd_elf_copy_private_section_data (bfd *ibfd,
5202 Elf_Internal_Shdr *ihdr, *ohdr;
5204 if (ibfd->xvec->flavour != bfd_target_elf_flavour
5205 || obfd->xvec->flavour != bfd_target_elf_flavour)
5208 if (elf_tdata (obfd)->segment_map == NULL && elf_tdata (ibfd)->phdr != NULL)
5212 /* Only set up the segments if there are no more SEC_ALLOC
5213 sections. FIXME: This won't do the right thing if objcopy is
5214 used to remove the last SEC_ALLOC section, since objcopy
5215 won't call this routine in that case. */
5216 for (s = isec->next; s != NULL; s = s->next)
5217 if ((s->flags & SEC_ALLOC) != 0)
5221 if (! copy_private_bfd_data (ibfd, obfd))
5226 ihdr = &elf_section_data (isec)->this_hdr;
5227 ohdr = &elf_section_data (osec)->this_hdr;
5229 ohdr->sh_entsize = ihdr->sh_entsize;
5231 if (ihdr->sh_type == SHT_SYMTAB
5232 || ihdr->sh_type == SHT_DYNSYM
5233 || ihdr->sh_type == SHT_GNU_verneed
5234 || ihdr->sh_type == SHT_GNU_verdef)
5235 ohdr->sh_info = ihdr->sh_info;
5237 /* Set things up for objcopy. The output SHT_GROUP section will
5238 have its elf_next_in_group pointing back to the input group
5240 elf_next_in_group (osec) = elf_next_in_group (isec);
5241 elf_group_name (osec) = elf_group_name (isec);
5243 osec->use_rela_p = isec->use_rela_p;
5248 /* Copy private symbol information. If this symbol is in a section
5249 which we did not map into a BFD section, try to map the section
5250 index correctly. We use special macro definitions for the mapped
5251 section indices; these definitions are interpreted by the
5252 swap_out_syms function. */
5254 #define MAP_ONESYMTAB (SHN_HIOS + 1)
5255 #define MAP_DYNSYMTAB (SHN_HIOS + 2)
5256 #define MAP_STRTAB (SHN_HIOS + 3)
5257 #define MAP_SHSTRTAB (SHN_HIOS + 4)
5258 #define MAP_SYM_SHNDX (SHN_HIOS + 5)
5261 _bfd_elf_copy_private_symbol_data (bfd *ibfd,
5266 elf_symbol_type *isym, *osym;
5268 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
5269 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
5272 isym = elf_symbol_from (ibfd, isymarg);
5273 osym = elf_symbol_from (obfd, osymarg);
5277 && bfd_is_abs_section (isym->symbol.section))
5281 shndx = isym->internal_elf_sym.st_shndx;
5282 if (shndx == elf_onesymtab (ibfd))
5283 shndx = MAP_ONESYMTAB;
5284 else if (shndx == elf_dynsymtab (ibfd))
5285 shndx = MAP_DYNSYMTAB;
5286 else if (shndx == elf_tdata (ibfd)->strtab_section)
5288 else if (shndx == elf_tdata (ibfd)->shstrtab_section)
5289 shndx = MAP_SHSTRTAB;
5290 else if (shndx == elf_tdata (ibfd)->symtab_shndx_section)
5291 shndx = MAP_SYM_SHNDX;
5292 osym->internal_elf_sym.st_shndx = shndx;
5298 /* Swap out the symbols. */
5301 swap_out_syms (bfd *abfd,
5302 struct bfd_strtab_hash **sttp,
5305 const struct elf_backend_data *bed;
5308 struct bfd_strtab_hash *stt;
5309 Elf_Internal_Shdr *symtab_hdr;
5310 Elf_Internal_Shdr *symtab_shndx_hdr;
5311 Elf_Internal_Shdr *symstrtab_hdr;
5312 char *outbound_syms;
5313 char *outbound_shndx;
5316 bfd_boolean name_local_sections;
5318 if (!elf_map_symbols (abfd))
5321 /* Dump out the symtabs. */
5322 stt = _bfd_elf_stringtab_init ();
5326 bed = get_elf_backend_data (abfd);
5327 symcount = bfd_get_symcount (abfd);
5328 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5329 symtab_hdr->sh_type = SHT_SYMTAB;
5330 symtab_hdr->sh_entsize = bed->s->sizeof_sym;
5331 symtab_hdr->sh_size = symtab_hdr->sh_entsize * (symcount + 1);
5332 symtab_hdr->sh_info = elf_num_locals (abfd) + 1;
5333 symtab_hdr->sh_addralign = 1 << bed->s->log_file_align;
5335 symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr;
5336 symstrtab_hdr->sh_type = SHT_STRTAB;
5338 amt = (bfd_size_type) (1 + symcount) * bed->s->sizeof_sym;
5339 outbound_syms = bfd_alloc (abfd, amt);
5340 if (outbound_syms == NULL)
5342 _bfd_stringtab_free (stt);
5345 symtab_hdr->contents = outbound_syms;
5347 outbound_shndx = NULL;
5348 symtab_shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
5349 if (symtab_shndx_hdr->sh_name != 0)
5351 amt = (bfd_size_type) (1 + symcount) * sizeof (Elf_External_Sym_Shndx);
5352 outbound_shndx = bfd_zalloc (abfd, amt);
5353 if (outbound_shndx == NULL)
5355 _bfd_stringtab_free (stt);
5359 symtab_shndx_hdr->contents = outbound_shndx;
5360 symtab_shndx_hdr->sh_type = SHT_SYMTAB_SHNDX;
5361 symtab_shndx_hdr->sh_size = amt;
5362 symtab_shndx_hdr->sh_addralign = sizeof (Elf_External_Sym_Shndx);
5363 symtab_shndx_hdr->sh_entsize = sizeof (Elf_External_Sym_Shndx);
5366 /* Now generate the data (for "contents"). */
5368 /* Fill in zeroth symbol and swap it out. */
5369 Elf_Internal_Sym sym;
5375 sym.st_shndx = SHN_UNDEF;
5376 bed->s->swap_symbol_out (abfd, &sym, outbound_syms, outbound_shndx);
5377 outbound_syms += bed->s->sizeof_sym;
5378 if (outbound_shndx != NULL)
5379 outbound_shndx += sizeof (Elf_External_Sym_Shndx);
5383 = (bed->elf_backend_name_local_section_symbols
5384 && bed->elf_backend_name_local_section_symbols (abfd));
5386 syms = bfd_get_outsymbols (abfd);
5387 for (idx = 0; idx < symcount; idx++)
5389 Elf_Internal_Sym sym;
5390 bfd_vma value = syms[idx]->value;
5391 elf_symbol_type *type_ptr;
5392 flagword flags = syms[idx]->flags;
5395 if (!name_local_sections
5396 && (flags & (BSF_SECTION_SYM | BSF_GLOBAL)) == BSF_SECTION_SYM)
5398 /* Local section symbols have no name. */
5403 sym.st_name = (unsigned long) _bfd_stringtab_add (stt,
5406 if (sym.st_name == (unsigned long) -1)
5408 _bfd_stringtab_free (stt);
5413 type_ptr = elf_symbol_from (abfd, syms[idx]);
5415 if ((flags & BSF_SECTION_SYM) == 0
5416 && bfd_is_com_section (syms[idx]->section))
5418 /* ELF common symbols put the alignment into the `value' field,
5419 and the size into the `size' field. This is backwards from
5420 how BFD handles it, so reverse it here. */
5421 sym.st_size = value;
5422 if (type_ptr == NULL
5423 || type_ptr->internal_elf_sym.st_value == 0)
5424 sym.st_value = value >= 16 ? 16 : (1 << bfd_log2 (value));
5426 sym.st_value = type_ptr->internal_elf_sym.st_value;
5427 sym.st_shndx = _bfd_elf_section_from_bfd_section
5428 (abfd, syms[idx]->section);
5432 asection *sec = syms[idx]->section;
5435 if (sec->output_section)
5437 value += sec->output_offset;
5438 sec = sec->output_section;
5441 /* Don't add in the section vma for relocatable output. */
5442 if (! relocatable_p)
5444 sym.st_value = value;
5445 sym.st_size = type_ptr ? type_ptr->internal_elf_sym.st_size : 0;
5447 if (bfd_is_abs_section (sec)
5449 && type_ptr->internal_elf_sym.st_shndx != 0)
5451 /* This symbol is in a real ELF section which we did
5452 not create as a BFD section. Undo the mapping done
5453 by copy_private_symbol_data. */
5454 shndx = type_ptr->internal_elf_sym.st_shndx;
5458 shndx = elf_onesymtab (abfd);
5461 shndx = elf_dynsymtab (abfd);
5464 shndx = elf_tdata (abfd)->strtab_section;
5467 shndx = elf_tdata (abfd)->shstrtab_section;
5470 shndx = elf_tdata (abfd)->symtab_shndx_section;
5478 shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
5484 /* Writing this would be a hell of a lot easier if
5485 we had some decent documentation on bfd, and
5486 knew what to expect of the library, and what to
5487 demand of applications. For example, it
5488 appears that `objcopy' might not set the
5489 section of a symbol to be a section that is
5490 actually in the output file. */
5491 sec2 = bfd_get_section_by_name (abfd, sec->name);
5494 _bfd_error_handler (_("\
5495 Unable to find equivalent output section for symbol '%s' from section '%s'"),
5496 syms[idx]->name ? syms[idx]->name : "<Local sym>",
5498 bfd_set_error (bfd_error_invalid_operation);
5499 _bfd_stringtab_free (stt);
5503 shndx = _bfd_elf_section_from_bfd_section (abfd, sec2);
5504 BFD_ASSERT (shndx != -1);
5508 sym.st_shndx = shndx;
5511 if ((flags & BSF_THREAD_LOCAL) != 0)
5513 else if ((flags & BSF_FUNCTION) != 0)
5515 else if ((flags & BSF_OBJECT) != 0)
5520 if (syms[idx]->section->flags & SEC_THREAD_LOCAL)
5523 /* Processor-specific types. */
5524 if (type_ptr != NULL
5525 && bed->elf_backend_get_symbol_type)
5526 type = ((*bed->elf_backend_get_symbol_type)
5527 (&type_ptr->internal_elf_sym, type));
5529 if (flags & BSF_SECTION_SYM)
5531 if (flags & BSF_GLOBAL)
5532 sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION);
5534 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
5536 else if (bfd_is_com_section (syms[idx]->section))
5537 sym.st_info = ELF_ST_INFO (STB_GLOBAL, type);
5538 else if (bfd_is_und_section (syms[idx]->section))
5539 sym.st_info = ELF_ST_INFO (((flags & BSF_WEAK)
5543 else if (flags & BSF_FILE)
5544 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE);
5547 int bind = STB_LOCAL;
5549 if (flags & BSF_LOCAL)
5551 else if (flags & BSF_WEAK)
5553 else if (flags & BSF_GLOBAL)
5556 sym.st_info = ELF_ST_INFO (bind, type);
5559 if (type_ptr != NULL)
5560 sym.st_other = type_ptr->internal_elf_sym.st_other;
5564 bed->s->swap_symbol_out (abfd, &sym, outbound_syms, outbound_shndx);
5565 outbound_syms += bed->s->sizeof_sym;
5566 if (outbound_shndx != NULL)
5567 outbound_shndx += sizeof (Elf_External_Sym_Shndx);
5571 symstrtab_hdr->sh_size = _bfd_stringtab_size (stt);
5572 symstrtab_hdr->sh_type = SHT_STRTAB;
5574 symstrtab_hdr->sh_flags = 0;
5575 symstrtab_hdr->sh_addr = 0;
5576 symstrtab_hdr->sh_entsize = 0;
5577 symstrtab_hdr->sh_link = 0;
5578 symstrtab_hdr->sh_info = 0;
5579 symstrtab_hdr->sh_addralign = 1;
5584 /* Return the number of bytes required to hold the symtab vector.
5586 Note that we base it on the count plus 1, since we will null terminate
5587 the vector allocated based on this size. However, the ELF symbol table
5588 always has a dummy entry as symbol #0, so it ends up even. */
5591 _bfd_elf_get_symtab_upper_bound (bfd *abfd)
5595 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->symtab_hdr;
5597 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
5598 symtab_size = (symcount + 1) * (sizeof (asymbol *));
5600 symtab_size -= sizeof (asymbol *);
5606 _bfd_elf_get_dynamic_symtab_upper_bound (bfd *abfd)
5610 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->dynsymtab_hdr;
5612 if (elf_dynsymtab (abfd) == 0)
5614 bfd_set_error (bfd_error_invalid_operation);
5618 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
5619 symtab_size = (symcount + 1) * (sizeof (asymbol *));
5621 symtab_size -= sizeof (asymbol *);
5627 _bfd_elf_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED,
5630 return (asect->reloc_count + 1) * sizeof (arelent *);
5633 /* Canonicalize the relocs. */
5636 _bfd_elf_canonicalize_reloc (bfd *abfd,
5643 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5645 if (! bed->s->slurp_reloc_table (abfd, section, symbols, FALSE))
5648 tblptr = section->relocation;
5649 for (i = 0; i < section->reloc_count; i++)
5650 *relptr++ = tblptr++;
5654 return section->reloc_count;
5658 _bfd_elf_canonicalize_symtab (bfd *abfd, asymbol **allocation)
5660 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5661 long symcount = bed->s->slurp_symbol_table (abfd, allocation, FALSE);
5664 bfd_get_symcount (abfd) = symcount;
5669 _bfd_elf_canonicalize_dynamic_symtab (bfd *abfd,
5670 asymbol **allocation)
5672 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5673 long symcount = bed->s->slurp_symbol_table (abfd, allocation, TRUE);
5676 bfd_get_dynamic_symcount (abfd) = symcount;
5680 /* Return the size required for the dynamic reloc entries. Any
5681 section that was actually installed in the BFD, and has type
5682 SHT_REL or SHT_RELA, and uses the dynamic symbol table, is
5683 considered to be a dynamic reloc section. */
5686 _bfd_elf_get_dynamic_reloc_upper_bound (bfd *abfd)
5691 if (elf_dynsymtab (abfd) == 0)
5693 bfd_set_error (bfd_error_invalid_operation);
5697 ret = sizeof (arelent *);
5698 for (s = abfd->sections; s != NULL; s = s->next)
5699 if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
5700 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
5701 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
5702 ret += ((s->_raw_size / elf_section_data (s)->this_hdr.sh_entsize)
5703 * sizeof (arelent *));
5708 /* Canonicalize the dynamic relocation entries. Note that we return
5709 the dynamic relocations as a single block, although they are
5710 actually associated with particular sections; the interface, which
5711 was designed for SunOS style shared libraries, expects that there
5712 is only one set of dynamic relocs. Any section that was actually
5713 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses
5714 the dynamic symbol table, is considered to be a dynamic reloc
5718 _bfd_elf_canonicalize_dynamic_reloc (bfd *abfd,
5722 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
5726 if (elf_dynsymtab (abfd) == 0)
5728 bfd_set_error (bfd_error_invalid_operation);
5732 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
5734 for (s = abfd->sections; s != NULL; s = s->next)
5736 if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
5737 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
5738 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
5743 if (! (*slurp_relocs) (abfd, s, syms, TRUE))
5745 count = s->_raw_size / elf_section_data (s)->this_hdr.sh_entsize;
5747 for (i = 0; i < count; i++)
5758 /* Read in the version information. */
5761 _bfd_elf_slurp_version_tables (bfd *abfd)
5763 bfd_byte *contents = NULL;
5766 if (elf_dynverdef (abfd) != 0)
5768 Elf_Internal_Shdr *hdr;
5769 Elf_External_Verdef *everdef;
5770 Elf_Internal_Verdef *iverdef;
5771 Elf_Internal_Verdef *iverdefarr;
5772 Elf_Internal_Verdef iverdefmem;
5774 unsigned int maxidx;
5776 hdr = &elf_tdata (abfd)->dynverdef_hdr;
5778 contents = bfd_malloc (hdr->sh_size);
5779 if (contents == NULL)
5781 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
5782 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size)
5785 /* We know the number of entries in the section but not the maximum
5786 index. Therefore we have to run through all entries and find
5788 everdef = (Elf_External_Verdef *) contents;
5790 for (i = 0; i < hdr->sh_info; ++i)
5792 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
5794 if ((iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION)) > maxidx)
5795 maxidx = iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION);
5797 everdef = ((Elf_External_Verdef *)
5798 ((bfd_byte *) everdef + iverdefmem.vd_next));
5801 amt = (bfd_size_type) maxidx * sizeof (Elf_Internal_Verdef);
5802 elf_tdata (abfd)->verdef = bfd_zalloc (abfd, amt);
5803 if (elf_tdata (abfd)->verdef == NULL)
5806 elf_tdata (abfd)->cverdefs = maxidx;
5808 everdef = (Elf_External_Verdef *) contents;
5809 iverdefarr = elf_tdata (abfd)->verdef;
5810 for (i = 0; i < hdr->sh_info; i++)
5812 Elf_External_Verdaux *everdaux;
5813 Elf_Internal_Verdaux *iverdaux;
5816 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
5818 iverdef = &iverdefarr[(iverdefmem.vd_ndx & VERSYM_VERSION) - 1];
5819 memcpy (iverdef, &iverdefmem, sizeof (Elf_Internal_Verdef));
5821 iverdef->vd_bfd = abfd;
5823 amt = (bfd_size_type) iverdef->vd_cnt * sizeof (Elf_Internal_Verdaux);
5824 iverdef->vd_auxptr = bfd_alloc (abfd, amt);
5825 if (iverdef->vd_auxptr == NULL)
5828 everdaux = ((Elf_External_Verdaux *)
5829 ((bfd_byte *) everdef + iverdef->vd_aux));
5830 iverdaux = iverdef->vd_auxptr;
5831 for (j = 0; j < iverdef->vd_cnt; j++, iverdaux++)
5833 _bfd_elf_swap_verdaux_in (abfd, everdaux, iverdaux);
5835 iverdaux->vda_nodename =
5836 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
5837 iverdaux->vda_name);
5838 if (iverdaux->vda_nodename == NULL)
5841 if (j + 1 < iverdef->vd_cnt)
5842 iverdaux->vda_nextptr = iverdaux + 1;
5844 iverdaux->vda_nextptr = NULL;
5846 everdaux = ((Elf_External_Verdaux *)
5847 ((bfd_byte *) everdaux + iverdaux->vda_next));
5850 iverdef->vd_nodename = iverdef->vd_auxptr->vda_nodename;
5852 if (i + 1 < hdr->sh_info)
5853 iverdef->vd_nextdef = iverdef + 1;
5855 iverdef->vd_nextdef = NULL;
5857 everdef = ((Elf_External_Verdef *)
5858 ((bfd_byte *) everdef + iverdef->vd_next));
5865 if (elf_dynverref (abfd) != 0)
5867 Elf_Internal_Shdr *hdr;
5868 Elf_External_Verneed *everneed;
5869 Elf_Internal_Verneed *iverneed;
5872 hdr = &elf_tdata (abfd)->dynverref_hdr;
5874 amt = (bfd_size_type) hdr->sh_info * sizeof (Elf_Internal_Verneed);
5875 elf_tdata (abfd)->verref = bfd_zalloc (abfd, amt);
5876 if (elf_tdata (abfd)->verref == NULL)
5879 elf_tdata (abfd)->cverrefs = hdr->sh_info;
5881 contents = bfd_malloc (hdr->sh_size);
5882 if (contents == NULL)
5884 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
5885 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size)
5888 everneed = (Elf_External_Verneed *) contents;
5889 iverneed = elf_tdata (abfd)->verref;
5890 for (i = 0; i < hdr->sh_info; i++, iverneed++)
5892 Elf_External_Vernaux *evernaux;
5893 Elf_Internal_Vernaux *ivernaux;
5896 _bfd_elf_swap_verneed_in (abfd, everneed, iverneed);
5898 iverneed->vn_bfd = abfd;
5900 iverneed->vn_filename =
5901 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
5903 if (iverneed->vn_filename == NULL)
5906 amt = iverneed->vn_cnt;
5907 amt *= sizeof (Elf_Internal_Vernaux);
5908 iverneed->vn_auxptr = bfd_alloc (abfd, amt);
5910 evernaux = ((Elf_External_Vernaux *)
5911 ((bfd_byte *) everneed + iverneed->vn_aux));
5912 ivernaux = iverneed->vn_auxptr;
5913 for (j = 0; j < iverneed->vn_cnt; j++, ivernaux++)
5915 _bfd_elf_swap_vernaux_in (abfd, evernaux, ivernaux);
5917 ivernaux->vna_nodename =
5918 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
5919 ivernaux->vna_name);
5920 if (ivernaux->vna_nodename == NULL)
5923 if (j + 1 < iverneed->vn_cnt)
5924 ivernaux->vna_nextptr = ivernaux + 1;
5926 ivernaux->vna_nextptr = NULL;
5928 evernaux = ((Elf_External_Vernaux *)
5929 ((bfd_byte *) evernaux + ivernaux->vna_next));
5932 if (i + 1 < hdr->sh_info)
5933 iverneed->vn_nextref = iverneed + 1;
5935 iverneed->vn_nextref = NULL;
5937 everneed = ((Elf_External_Verneed *)
5938 ((bfd_byte *) everneed + iverneed->vn_next));
5948 if (contents != NULL)
5954 _bfd_elf_make_empty_symbol (bfd *abfd)
5956 elf_symbol_type *newsym;
5957 bfd_size_type amt = sizeof (elf_symbol_type);
5959 newsym = bfd_zalloc (abfd, amt);
5964 newsym->symbol.the_bfd = abfd;
5965 return &newsym->symbol;
5970 _bfd_elf_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED,
5974 bfd_symbol_info (symbol, ret);
5977 /* Return whether a symbol name implies a local symbol. Most targets
5978 use this function for the is_local_label_name entry point, but some
5982 _bfd_elf_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED,
5985 /* Normal local symbols start with ``.L''. */
5986 if (name[0] == '.' && name[1] == 'L')
5989 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
5990 DWARF debugging symbols starting with ``..''. */
5991 if (name[0] == '.' && name[1] == '.')
5994 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
5995 emitting DWARF debugging output. I suspect this is actually a
5996 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
5997 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
5998 underscore to be emitted on some ELF targets). For ease of use,
5999 we treat such symbols as local. */
6000 if (name[0] == '_' && name[1] == '.' && name[2] == 'L' && name[3] == '_')
6007 _bfd_elf_get_lineno (bfd *abfd ATTRIBUTE_UNUSED,
6008 asymbol *symbol ATTRIBUTE_UNUSED)
6015 _bfd_elf_set_arch_mach (bfd *abfd,
6016 enum bfd_architecture arch,
6017 unsigned long machine)
6019 /* If this isn't the right architecture for this backend, and this
6020 isn't the generic backend, fail. */
6021 if (arch != get_elf_backend_data (abfd)->arch
6022 && arch != bfd_arch_unknown
6023 && get_elf_backend_data (abfd)->arch != bfd_arch_unknown)
6026 return bfd_default_set_arch_mach (abfd, arch, machine);
6029 /* Find the function to a particular section and offset,
6030 for error reporting. */
6033 elf_find_function (bfd *abfd ATTRIBUTE_UNUSED,
6037 const char **filename_ptr,
6038 const char **functionname_ptr)
6040 const char *filename;
6049 for (p = symbols; *p != NULL; p++)
6053 q = (elf_symbol_type *) *p;
6055 if (bfd_get_section (&q->symbol) != section)
6058 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
6063 filename = bfd_asymbol_name (&q->symbol);
6067 if (q->symbol.section == section
6068 && q->symbol.value >= low_func
6069 && q->symbol.value <= offset)
6071 func = (asymbol *) q;
6072 low_func = q->symbol.value;
6082 *filename_ptr = filename;
6083 if (functionname_ptr)
6084 *functionname_ptr = bfd_asymbol_name (func);
6089 /* Find the nearest line to a particular section and offset,
6090 for error reporting. */
6093 _bfd_elf_find_nearest_line (bfd *abfd,
6097 const char **filename_ptr,
6098 const char **functionname_ptr,
6099 unsigned int *line_ptr)
6103 if (_bfd_dwarf1_find_nearest_line (abfd, section, symbols, offset,
6104 filename_ptr, functionname_ptr,
6107 if (!*functionname_ptr)
6108 elf_find_function (abfd, section, symbols, offset,
6109 *filename_ptr ? NULL : filename_ptr,
6115 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
6116 filename_ptr, functionname_ptr,
6118 &elf_tdata (abfd)->dwarf2_find_line_info))
6120 if (!*functionname_ptr)
6121 elf_find_function (abfd, section, symbols, offset,
6122 *filename_ptr ? NULL : filename_ptr,
6128 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
6129 &found, filename_ptr,
6130 functionname_ptr, line_ptr,
6131 &elf_tdata (abfd)->line_info))
6133 if (found && (*functionname_ptr || *line_ptr))
6136 if (symbols == NULL)
6139 if (! elf_find_function (abfd, section, symbols, offset,
6140 filename_ptr, functionname_ptr))
6148 _bfd_elf_sizeof_headers (bfd *abfd, bfd_boolean reloc)
6152 ret = get_elf_backend_data (abfd)->s->sizeof_ehdr;
6154 ret += get_program_header_size (abfd);
6159 _bfd_elf_set_section_contents (bfd *abfd,
6161 const void *location,
6163 bfd_size_type count)
6165 Elf_Internal_Shdr *hdr;
6168 if (! abfd->output_has_begun
6169 && ! _bfd_elf_compute_section_file_positions (abfd, NULL))
6172 hdr = &elf_section_data (section)->this_hdr;
6173 pos = hdr->sh_offset + offset;
6174 if (bfd_seek (abfd, pos, SEEK_SET) != 0
6175 || bfd_bwrite (location, count, abfd) != count)
6182 _bfd_elf_no_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
6183 arelent *cache_ptr ATTRIBUTE_UNUSED,
6184 Elf_Internal_Rela *dst ATTRIBUTE_UNUSED)
6189 /* Try to convert a non-ELF reloc into an ELF one. */
6192 _bfd_elf_validate_reloc (bfd *abfd, arelent *areloc)
6194 /* Check whether we really have an ELF howto. */
6196 if ((*areloc->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec)
6198 bfd_reloc_code_real_type code;
6199 reloc_howto_type *howto;
6201 /* Alien reloc: Try to determine its type to replace it with an
6202 equivalent ELF reloc. */
6204 if (areloc->howto->pc_relative)
6206 switch (areloc->howto->bitsize)
6209 code = BFD_RELOC_8_PCREL;
6212 code = BFD_RELOC_12_PCREL;
6215 code = BFD_RELOC_16_PCREL;
6218 code = BFD_RELOC_24_PCREL;
6221 code = BFD_RELOC_32_PCREL;
6224 code = BFD_RELOC_64_PCREL;
6230 howto = bfd_reloc_type_lookup (abfd, code);
6232 if (areloc->howto->pcrel_offset != howto->pcrel_offset)
6234 if (howto->pcrel_offset)
6235 areloc->addend += areloc->address;
6237 areloc->addend -= areloc->address; /* addend is unsigned!! */
6242 switch (areloc->howto->bitsize)
6248 code = BFD_RELOC_14;
6251 code = BFD_RELOC_16;
6254 code = BFD_RELOC_26;
6257 code = BFD_RELOC_32;
6260 code = BFD_RELOC_64;
6266 howto = bfd_reloc_type_lookup (abfd, code);
6270 areloc->howto = howto;
6278 (*_bfd_error_handler)
6279 (_("%s: unsupported relocation type %s"),
6280 bfd_archive_filename (abfd), areloc->howto->name);
6281 bfd_set_error (bfd_error_bad_value);
6286 _bfd_elf_close_and_cleanup (bfd *abfd)
6288 if (bfd_get_format (abfd) == bfd_object)
6290 if (elf_shstrtab (abfd) != NULL)
6291 _bfd_elf_strtab_free (elf_shstrtab (abfd));
6294 return _bfd_generic_close_and_cleanup (abfd);
6297 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
6298 in the relocation's offset. Thus we cannot allow any sort of sanity
6299 range-checking to interfere. There is nothing else to do in processing
6302 bfd_reloc_status_type
6303 _bfd_elf_rel_vtable_reloc_fn
6304 (bfd *abfd ATTRIBUTE_UNUSED, arelent *re ATTRIBUTE_UNUSED,
6305 struct bfd_symbol *symbol ATTRIBUTE_UNUSED,
6306 void *data ATTRIBUTE_UNUSED, asection *is ATTRIBUTE_UNUSED,
6307 bfd *obfd ATTRIBUTE_UNUSED, char **errmsg ATTRIBUTE_UNUSED)
6309 return bfd_reloc_ok;
6312 /* Elf core file support. Much of this only works on native
6313 toolchains, since we rely on knowing the
6314 machine-dependent procfs structure in order to pick
6315 out details about the corefile. */
6317 #ifdef HAVE_SYS_PROCFS_H
6318 # include <sys/procfs.h>
6321 /* FIXME: this is kinda wrong, but it's what gdb wants. */
6324 elfcore_make_pid (bfd *abfd)
6326 return ((elf_tdata (abfd)->core_lwpid << 16)
6327 + (elf_tdata (abfd)->core_pid));
6330 /* If there isn't a section called NAME, make one, using
6331 data from SECT. Note, this function will generate a
6332 reference to NAME, so you shouldn't deallocate or
6336 elfcore_maybe_make_sect (bfd *abfd, char *name, asection *sect)
6340 if (bfd_get_section_by_name (abfd, name) != NULL)
6343 sect2 = bfd_make_section (abfd, name);
6347 sect2->_raw_size = sect->_raw_size;
6348 sect2->filepos = sect->filepos;
6349 sect2->flags = sect->flags;
6350 sect2->alignment_power = sect->alignment_power;
6354 /* Create a pseudosection containing SIZE bytes at FILEPOS. This
6355 actually creates up to two pseudosections:
6356 - For the single-threaded case, a section named NAME, unless
6357 such a section already exists.
6358 - For the multi-threaded case, a section named "NAME/PID", where
6359 PID is elfcore_make_pid (abfd).
6360 Both pseudosections have identical contents. */
6362 _bfd_elfcore_make_pseudosection (bfd *abfd,
6368 char *threaded_name;
6372 /* Build the section name. */
6374 sprintf (buf, "%s/%d", name, elfcore_make_pid (abfd));
6375 len = strlen (buf) + 1;
6376 threaded_name = bfd_alloc (abfd, len);
6377 if (threaded_name == NULL)
6379 memcpy (threaded_name, buf, len);
6381 sect = bfd_make_section_anyway (abfd, threaded_name);
6384 sect->_raw_size = size;
6385 sect->filepos = filepos;
6386 sect->flags = SEC_HAS_CONTENTS;
6387 sect->alignment_power = 2;
6389 return elfcore_maybe_make_sect (abfd, name, sect);
6392 /* prstatus_t exists on:
6394 linux 2.[01] + glibc
6398 #if defined (HAVE_PRSTATUS_T)
6401 elfcore_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
6406 if (note->descsz == sizeof (prstatus_t))
6410 raw_size = sizeof (prstat.pr_reg);
6411 offset = offsetof (prstatus_t, pr_reg);
6412 memcpy (&prstat, note->descdata, sizeof (prstat));
6414 /* Do not overwrite the core signal if it
6415 has already been set by another thread. */
6416 if (elf_tdata (abfd)->core_signal == 0)
6417 elf_tdata (abfd)->core_signal = prstat.pr_cursig;
6418 elf_tdata (abfd)->core_pid = prstat.pr_pid;
6420 /* pr_who exists on:
6423 pr_who doesn't exist on:
6426 #if defined (HAVE_PRSTATUS_T_PR_WHO)
6427 elf_tdata (abfd)->core_lwpid = prstat.pr_who;
6430 #if defined (HAVE_PRSTATUS32_T)
6431 else if (note->descsz == sizeof (prstatus32_t))
6433 /* 64-bit host, 32-bit corefile */
6434 prstatus32_t prstat;
6436 raw_size = sizeof (prstat.pr_reg);
6437 offset = offsetof (prstatus32_t, pr_reg);
6438 memcpy (&prstat, note->descdata, sizeof (prstat));
6440 /* Do not overwrite the core signal if it
6441 has already been set by another thread. */
6442 if (elf_tdata (abfd)->core_signal == 0)
6443 elf_tdata (abfd)->core_signal = prstat.pr_cursig;
6444 elf_tdata (abfd)->core_pid = prstat.pr_pid;
6446 /* pr_who exists on:
6449 pr_who doesn't exist on:
6452 #if defined (HAVE_PRSTATUS32_T_PR_WHO)
6453 elf_tdata (abfd)->core_lwpid = prstat.pr_who;
6456 #endif /* HAVE_PRSTATUS32_T */
6459 /* Fail - we don't know how to handle any other
6460 note size (ie. data object type). */
6464 /* Make a ".reg/999" section and a ".reg" section. */
6465 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
6466 raw_size, note->descpos + offset);
6468 #endif /* defined (HAVE_PRSTATUS_T) */
6470 /* Create a pseudosection containing the exact contents of NOTE. */
6472 elfcore_make_note_pseudosection (bfd *abfd,
6474 Elf_Internal_Note *note)
6476 return _bfd_elfcore_make_pseudosection (abfd, name,
6477 note->descsz, note->descpos);
6480 /* There isn't a consistent prfpregset_t across platforms,
6481 but it doesn't matter, because we don't have to pick this
6482 data structure apart. */
6485 elfcore_grok_prfpreg (bfd *abfd, Elf_Internal_Note *note)
6487 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
6490 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
6491 type of 5 (NT_PRXFPREG). Just include the whole note's contents
6495 elfcore_grok_prxfpreg (bfd *abfd, Elf_Internal_Note *note)
6497 return elfcore_make_note_pseudosection (abfd, ".reg-xfp", note);
6500 #if defined (HAVE_PRPSINFO_T)
6501 typedef prpsinfo_t elfcore_psinfo_t;
6502 #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
6503 typedef prpsinfo32_t elfcore_psinfo32_t;
6507 #if defined (HAVE_PSINFO_T)
6508 typedef psinfo_t elfcore_psinfo_t;
6509 #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
6510 typedef psinfo32_t elfcore_psinfo32_t;
6514 /* return a malloc'ed copy of a string at START which is at
6515 most MAX bytes long, possibly without a terminating '\0'.
6516 the copy will always have a terminating '\0'. */
6519 _bfd_elfcore_strndup (bfd *abfd, char *start, size_t max)
6522 char *end = memchr (start, '\0', max);
6530 dups = bfd_alloc (abfd, len + 1);
6534 memcpy (dups, start, len);
6540 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
6542 elfcore_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
6544 if (note->descsz == sizeof (elfcore_psinfo_t))
6546 elfcore_psinfo_t psinfo;
6548 memcpy (&psinfo, note->descdata, sizeof (psinfo));
6550 elf_tdata (abfd)->core_program
6551 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
6552 sizeof (psinfo.pr_fname));
6554 elf_tdata (abfd)->core_command
6555 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
6556 sizeof (psinfo.pr_psargs));
6558 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
6559 else if (note->descsz == sizeof (elfcore_psinfo32_t))
6561 /* 64-bit host, 32-bit corefile */
6562 elfcore_psinfo32_t psinfo;
6564 memcpy (&psinfo, note->descdata, sizeof (psinfo));
6566 elf_tdata (abfd)->core_program
6567 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
6568 sizeof (psinfo.pr_fname));
6570 elf_tdata (abfd)->core_command
6571 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
6572 sizeof (psinfo.pr_psargs));
6578 /* Fail - we don't know how to handle any other
6579 note size (ie. data object type). */
6583 /* Note that for some reason, a spurious space is tacked
6584 onto the end of the args in some (at least one anyway)
6585 implementations, so strip it off if it exists. */
6588 char *command = elf_tdata (abfd)->core_command;
6589 int n = strlen (command);
6591 if (0 < n && command[n - 1] == ' ')
6592 command[n - 1] = '\0';
6597 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
6599 #if defined (HAVE_PSTATUS_T)
6601 elfcore_grok_pstatus (bfd *abfd, Elf_Internal_Note *note)
6603 if (note->descsz == sizeof (pstatus_t)
6604 #if defined (HAVE_PXSTATUS_T)
6605 || note->descsz == sizeof (pxstatus_t)
6611 memcpy (&pstat, note->descdata, sizeof (pstat));
6613 elf_tdata (abfd)->core_pid = pstat.pr_pid;
6615 #if defined (HAVE_PSTATUS32_T)
6616 else if (note->descsz == sizeof (pstatus32_t))
6618 /* 64-bit host, 32-bit corefile */
6621 memcpy (&pstat, note->descdata, sizeof (pstat));
6623 elf_tdata (abfd)->core_pid = pstat.pr_pid;
6626 /* Could grab some more details from the "representative"
6627 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
6628 NT_LWPSTATUS note, presumably. */
6632 #endif /* defined (HAVE_PSTATUS_T) */
6634 #if defined (HAVE_LWPSTATUS_T)
6636 elfcore_grok_lwpstatus (bfd *abfd, Elf_Internal_Note *note)
6638 lwpstatus_t lwpstat;
6644 if (note->descsz != sizeof (lwpstat)
6645 #if defined (HAVE_LWPXSTATUS_T)
6646 && note->descsz != sizeof (lwpxstatus_t)
6651 memcpy (&lwpstat, note->descdata, sizeof (lwpstat));
6653 elf_tdata (abfd)->core_lwpid = lwpstat.pr_lwpid;
6654 elf_tdata (abfd)->core_signal = lwpstat.pr_cursig;
6656 /* Make a ".reg/999" section. */
6658 sprintf (buf, ".reg/%d", elfcore_make_pid (abfd));
6659 len = strlen (buf) + 1;
6660 name = bfd_alloc (abfd, len);
6663 memcpy (name, buf, len);
6665 sect = bfd_make_section_anyway (abfd, name);
6669 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
6670 sect->_raw_size = sizeof (lwpstat.pr_context.uc_mcontext.gregs);
6671 sect->filepos = note->descpos
6672 + offsetof (lwpstatus_t, pr_context.uc_mcontext.gregs);
6675 #if defined (HAVE_LWPSTATUS_T_PR_REG)
6676 sect->_raw_size = sizeof (lwpstat.pr_reg);
6677 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_reg);
6680 sect->flags = SEC_HAS_CONTENTS;
6681 sect->alignment_power = 2;
6683 if (!elfcore_maybe_make_sect (abfd, ".reg", sect))
6686 /* Make a ".reg2/999" section */
6688 sprintf (buf, ".reg2/%d", elfcore_make_pid (abfd));
6689 len = strlen (buf) + 1;
6690 name = bfd_alloc (abfd, len);
6693 memcpy (name, buf, len);
6695 sect = bfd_make_section_anyway (abfd, name);
6699 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
6700 sect->_raw_size = sizeof (lwpstat.pr_context.uc_mcontext.fpregs);
6701 sect->filepos = note->descpos
6702 + offsetof (lwpstatus_t, pr_context.uc_mcontext.fpregs);
6705 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
6706 sect->_raw_size = sizeof (lwpstat.pr_fpreg);
6707 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_fpreg);
6710 sect->flags = SEC_HAS_CONTENTS;
6711 sect->alignment_power = 2;
6713 return elfcore_maybe_make_sect (abfd, ".reg2", sect);
6715 #endif /* defined (HAVE_LWPSTATUS_T) */
6717 #if defined (HAVE_WIN32_PSTATUS_T)
6719 elfcore_grok_win32pstatus (bfd *abfd, Elf_Internal_Note *note)
6725 win32_pstatus_t pstatus;
6727 if (note->descsz < sizeof (pstatus))
6730 memcpy (&pstatus, note->descdata, sizeof (pstatus));
6732 switch (pstatus.data_type)
6734 case NOTE_INFO_PROCESS:
6735 /* FIXME: need to add ->core_command. */
6736 elf_tdata (abfd)->core_signal = pstatus.data.process_info.signal;
6737 elf_tdata (abfd)->core_pid = pstatus.data.process_info.pid;
6740 case NOTE_INFO_THREAD:
6741 /* Make a ".reg/999" section. */
6742 sprintf (buf, ".reg/%d", pstatus.data.thread_info.tid);
6744 len = strlen (buf) + 1;
6745 name = bfd_alloc (abfd, len);
6749 memcpy (name, buf, len);
6751 sect = bfd_make_section_anyway (abfd, name);
6755 sect->_raw_size = sizeof (pstatus.data.thread_info.thread_context);
6756 sect->filepos = (note->descpos
6757 + offsetof (struct win32_pstatus,
6758 data.thread_info.thread_context));
6759 sect->flags = SEC_HAS_CONTENTS;
6760 sect->alignment_power = 2;
6762 if (pstatus.data.thread_info.is_active_thread)
6763 if (! elfcore_maybe_make_sect (abfd, ".reg", sect))
6767 case NOTE_INFO_MODULE:
6768 /* Make a ".module/xxxxxxxx" section. */
6769 sprintf (buf, ".module/%08x", pstatus.data.module_info.base_address);
6771 len = strlen (buf) + 1;
6772 name = bfd_alloc (abfd, len);
6776 memcpy (name, buf, len);
6778 sect = bfd_make_section_anyway (abfd, name);
6783 sect->_raw_size = note->descsz;
6784 sect->filepos = note->descpos;
6785 sect->flags = SEC_HAS_CONTENTS;
6786 sect->alignment_power = 2;
6795 #endif /* HAVE_WIN32_PSTATUS_T */
6798 elfcore_grok_note (bfd *abfd, Elf_Internal_Note *note)
6800 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6808 if (bed->elf_backend_grok_prstatus)
6809 if ((*bed->elf_backend_grok_prstatus) (abfd, note))
6811 #if defined (HAVE_PRSTATUS_T)
6812 return elfcore_grok_prstatus (abfd, note);
6817 #if defined (HAVE_PSTATUS_T)
6819 return elfcore_grok_pstatus (abfd, note);
6822 #if defined (HAVE_LWPSTATUS_T)
6824 return elfcore_grok_lwpstatus (abfd, note);
6827 case NT_FPREGSET: /* FIXME: rename to NT_PRFPREG */
6828 return elfcore_grok_prfpreg (abfd, note);
6830 #if defined (HAVE_WIN32_PSTATUS_T)
6831 case NT_WIN32PSTATUS:
6832 return elfcore_grok_win32pstatus (abfd, note);
6835 case NT_PRXFPREG: /* Linux SSE extension */
6836 if (note->namesz == 6
6837 && strcmp (note->namedata, "LINUX") == 0)
6838 return elfcore_grok_prxfpreg (abfd, note);
6844 if (bed->elf_backend_grok_psinfo)
6845 if ((*bed->elf_backend_grok_psinfo) (abfd, note))
6847 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
6848 return elfcore_grok_psinfo (abfd, note);
6855 asection *sect = bfd_make_section_anyway (abfd, ".auxv");
6859 sect->_raw_size = note->descsz;
6860 sect->filepos = note->descpos;
6861 sect->flags = SEC_HAS_CONTENTS;
6862 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32;
6870 elfcore_netbsd_get_lwpid (Elf_Internal_Note *note, int *lwpidp)
6874 cp = strchr (note->namedata, '@');
6877 *lwpidp = atoi(cp + 1);
6884 elfcore_grok_netbsd_procinfo (bfd *abfd, Elf_Internal_Note *note)
6887 /* Signal number at offset 0x08. */
6888 elf_tdata (abfd)->core_signal
6889 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x08);
6891 /* Process ID at offset 0x50. */
6892 elf_tdata (abfd)->core_pid
6893 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x50);
6895 /* Command name at 0x7c (max 32 bytes, including nul). */
6896 elf_tdata (abfd)->core_command
6897 = _bfd_elfcore_strndup (abfd, note->descdata + 0x7c, 31);
6899 return elfcore_make_note_pseudosection (abfd, ".note.netbsdcore.procinfo",
6904 elfcore_grok_netbsd_note (bfd *abfd, Elf_Internal_Note *note)
6908 if (elfcore_netbsd_get_lwpid (note, &lwp))
6909 elf_tdata (abfd)->core_lwpid = lwp;
6911 if (note->type == NT_NETBSDCORE_PROCINFO)
6913 /* NetBSD-specific core "procinfo". Note that we expect to
6914 find this note before any of the others, which is fine,
6915 since the kernel writes this note out first when it
6916 creates a core file. */
6918 return elfcore_grok_netbsd_procinfo (abfd, note);
6921 /* As of Jan 2002 there are no other machine-independent notes
6922 defined for NetBSD core files. If the note type is less
6923 than the start of the machine-dependent note types, we don't
6926 if (note->type < NT_NETBSDCORE_FIRSTMACH)
6930 switch (bfd_get_arch (abfd))
6932 /* On the Alpha, SPARC (32-bit and 64-bit), PT_GETREGS == mach+0 and
6933 PT_GETFPREGS == mach+2. */
6935 case bfd_arch_alpha:
6936 case bfd_arch_sparc:
6939 case NT_NETBSDCORE_FIRSTMACH+0:
6940 return elfcore_make_note_pseudosection (abfd, ".reg", note);
6942 case NT_NETBSDCORE_FIRSTMACH+2:
6943 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
6949 /* On all other arch's, PT_GETREGS == mach+1 and
6950 PT_GETFPREGS == mach+3. */
6955 case NT_NETBSDCORE_FIRSTMACH+1:
6956 return elfcore_make_note_pseudosection (abfd, ".reg", note);
6958 case NT_NETBSDCORE_FIRSTMACH+3:
6959 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
6969 elfcore_grok_nto_status (bfd *abfd, Elf_Internal_Note *note, pid_t *tid)
6971 void *ddata = note->descdata;
6978 /* nto_procfs_status 'pid' field is at offset 0. */
6979 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, (bfd_byte *) ddata);
6981 /* nto_procfs_status 'tid' field is at offset 4. Pass it back. */
6982 *tid = bfd_get_32 (abfd, (bfd_byte *) ddata + 4);
6984 /* nto_procfs_status 'flags' field is at offset 8. */
6985 flags = bfd_get_32 (abfd, (bfd_byte *) ddata + 8);
6987 /* nto_procfs_status 'what' field is at offset 14. */
6988 if ((sig = bfd_get_16 (abfd, (bfd_byte *) ddata + 14)) > 0)
6990 elf_tdata (abfd)->core_signal = sig;
6991 elf_tdata (abfd)->core_lwpid = *tid;
6994 /* _DEBUG_FLAG_CURTID (current thread) is 0x80. Some cores
6995 do not come from signals so we make sure we set the current
6996 thread just in case. */
6997 if (flags & 0x00000080)
6998 elf_tdata (abfd)->core_lwpid = *tid;
7000 /* Make a ".qnx_core_status/%d" section. */
7001 sprintf (buf, ".qnx_core_status/%d", *tid);
7003 name = bfd_alloc (abfd, strlen (buf) + 1);
7008 sect = bfd_make_section_anyway (abfd, name);
7012 sect->_raw_size = note->descsz;
7013 sect->filepos = note->descpos;
7014 sect->flags = SEC_HAS_CONTENTS;
7015 sect->alignment_power = 2;
7017 return (elfcore_maybe_make_sect (abfd, ".qnx_core_status", sect));
7021 elfcore_grok_nto_gregs (bfd *abfd, Elf_Internal_Note *note, pid_t tid)
7027 /* Make a ".reg/%d" section. */
7028 sprintf (buf, ".reg/%d", tid);
7030 name = bfd_alloc (abfd, strlen (buf) + 1);
7035 sect = bfd_make_section_anyway (abfd, name);
7039 sect->_raw_size = note->descsz;
7040 sect->filepos = note->descpos;
7041 sect->flags = SEC_HAS_CONTENTS;
7042 sect->alignment_power = 2;
7044 /* This is the current thread. */
7045 if (elf_tdata (abfd)->core_lwpid == tid)
7046 return elfcore_maybe_make_sect (abfd, ".reg", sect);
7051 #define BFD_QNT_CORE_INFO 7
7052 #define BFD_QNT_CORE_STATUS 8
7053 #define BFD_QNT_CORE_GREG 9
7054 #define BFD_QNT_CORE_FPREG 10
7057 elfcore_grok_nto_note (bfd *abfd, Elf_Internal_Note *note)
7059 /* Every GREG section has a STATUS section before it. Store the
7060 tid from the previous call to pass down to the next gregs
7062 static pid_t tid = 1;
7066 case BFD_QNT_CORE_INFO: return elfcore_make_note_pseudosection (abfd, ".qnx_core_info", note);
7067 case BFD_QNT_CORE_STATUS: return elfcore_grok_nto_status (abfd, note, &tid);
7068 case BFD_QNT_CORE_GREG: return elfcore_grok_nto_gregs (abfd, note, tid);
7069 case BFD_QNT_CORE_FPREG: return elfcore_grok_prfpreg (abfd, note);
7070 default: return TRUE;
7074 /* Function: elfcore_write_note
7081 size of data for note
7084 End of buffer containing note. */
7087 elfcore_write_note (bfd *abfd,
7095 Elf_External_Note *xnp;
7105 const struct elf_backend_data *bed;
7107 namesz = strlen (name) + 1;
7108 bed = get_elf_backend_data (abfd);
7109 pad = -namesz & ((1 << bed->s->log_file_align) - 1);
7112 newspace = 12 + namesz + pad + size;
7114 p = realloc (buf, *bufsiz + newspace);
7116 *bufsiz += newspace;
7117 xnp = (Elf_External_Note *) dest;
7118 H_PUT_32 (abfd, namesz, xnp->namesz);
7119 H_PUT_32 (abfd, size, xnp->descsz);
7120 H_PUT_32 (abfd, type, xnp->type);
7124 memcpy (dest, name, namesz);
7132 memcpy (dest, input, size);
7136 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7138 elfcore_write_prpsinfo (bfd *abfd,
7145 char *note_name = "CORE";
7147 #if defined (HAVE_PSINFO_T)
7149 note_type = NT_PSINFO;
7152 note_type = NT_PRPSINFO;
7155 memset (&data, 0, sizeof (data));
7156 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
7157 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
7158 return elfcore_write_note (abfd, buf, bufsiz,
7159 note_name, note_type, &data, sizeof (data));
7161 #endif /* PSINFO_T or PRPSINFO_T */
7163 #if defined (HAVE_PRSTATUS_T)
7165 elfcore_write_prstatus (bfd *abfd,
7173 char *note_name = "CORE";
7175 memset (&prstat, 0, sizeof (prstat));
7176 prstat.pr_pid = pid;
7177 prstat.pr_cursig = cursig;
7178 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
7179 return elfcore_write_note (abfd, buf, bufsiz,
7180 note_name, NT_PRSTATUS, &prstat, sizeof (prstat));
7182 #endif /* HAVE_PRSTATUS_T */
7184 #if defined (HAVE_LWPSTATUS_T)
7186 elfcore_write_lwpstatus (bfd *abfd,
7193 lwpstatus_t lwpstat;
7194 char *note_name = "CORE";
7196 memset (&lwpstat, 0, sizeof (lwpstat));
7197 lwpstat.pr_lwpid = pid >> 16;
7198 lwpstat.pr_cursig = cursig;
7199 #if defined (HAVE_LWPSTATUS_T_PR_REG)
7200 memcpy (lwpstat.pr_reg, gregs, sizeof (lwpstat.pr_reg));
7201 #elif defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7203 memcpy (lwpstat.pr_context.uc_mcontext.gregs,
7204 gregs, sizeof (lwpstat.pr_context.uc_mcontext.gregs));
7206 memcpy (lwpstat.pr_context.uc_mcontext.__gregs,
7207 gregs, sizeof (lwpstat.pr_context.uc_mcontext.__gregs));
7210 return elfcore_write_note (abfd, buf, bufsiz, note_name,
7211 NT_LWPSTATUS, &lwpstat, sizeof (lwpstat));
7213 #endif /* HAVE_LWPSTATUS_T */
7215 #if defined (HAVE_PSTATUS_T)
7217 elfcore_write_pstatus (bfd *abfd,
7225 char *note_name = "CORE";
7227 memset (&pstat, 0, sizeof (pstat));
7228 pstat.pr_pid = pid & 0xffff;
7229 buf = elfcore_write_note (abfd, buf, bufsiz, note_name,
7230 NT_PSTATUS, &pstat, sizeof (pstat));
7233 #endif /* HAVE_PSTATUS_T */
7236 elfcore_write_prfpreg (bfd *abfd,
7242 char *note_name = "CORE";
7243 return elfcore_write_note (abfd, buf, bufsiz,
7244 note_name, NT_FPREGSET, fpregs, size);
7248 elfcore_write_prxfpreg (bfd *abfd,
7251 const void *xfpregs,
7254 char *note_name = "LINUX";
7255 return elfcore_write_note (abfd, buf, bufsiz,
7256 note_name, NT_PRXFPREG, xfpregs, size);
7260 elfcore_read_notes (bfd *abfd, file_ptr offset, bfd_size_type size)
7268 if (bfd_seek (abfd, offset, SEEK_SET) != 0)
7271 buf = bfd_malloc (size);
7275 if (bfd_bread (buf, size, abfd) != size)
7283 while (p < buf + size)
7285 /* FIXME: bad alignment assumption. */
7286 Elf_External_Note *xnp = (Elf_External_Note *) p;
7287 Elf_Internal_Note in;
7289 in.type = H_GET_32 (abfd, xnp->type);
7291 in.namesz = H_GET_32 (abfd, xnp->namesz);
7292 in.namedata = xnp->name;
7294 in.descsz = H_GET_32 (abfd, xnp->descsz);
7295 in.descdata = in.namedata + BFD_ALIGN (in.namesz, 4);
7296 in.descpos = offset + (in.descdata - buf);
7298 if (strncmp (in.namedata, "NetBSD-CORE", 11) == 0)
7300 if (! elfcore_grok_netbsd_note (abfd, &in))
7303 else if (strncmp (in.namedata, "QNX", 3) == 0)
7305 if (! elfcore_grok_nto_note (abfd, &in))
7310 if (! elfcore_grok_note (abfd, &in))
7314 p = in.descdata + BFD_ALIGN (in.descsz, 4);
7321 /* Providing external access to the ELF program header table. */
7323 /* Return an upper bound on the number of bytes required to store a
7324 copy of ABFD's program header table entries. Return -1 if an error
7325 occurs; bfd_get_error will return an appropriate code. */
7328 bfd_get_elf_phdr_upper_bound (bfd *abfd)
7330 if (abfd->xvec->flavour != bfd_target_elf_flavour)
7332 bfd_set_error (bfd_error_wrong_format);
7336 return elf_elfheader (abfd)->e_phnum * sizeof (Elf_Internal_Phdr);
7339 /* Copy ABFD's program header table entries to *PHDRS. The entries
7340 will be stored as an array of Elf_Internal_Phdr structures, as
7341 defined in include/elf/internal.h. To find out how large the
7342 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
7344 Return the number of program header table entries read, or -1 if an
7345 error occurs; bfd_get_error will return an appropriate code. */
7348 bfd_get_elf_phdrs (bfd *abfd, void *phdrs)
7352 if (abfd->xvec->flavour != bfd_target_elf_flavour)
7354 bfd_set_error (bfd_error_wrong_format);
7358 num_phdrs = elf_elfheader (abfd)->e_phnum;
7359 memcpy (phdrs, elf_tdata (abfd)->phdr,
7360 num_phdrs * sizeof (Elf_Internal_Phdr));
7366 _bfd_elf_sprintf_vma (bfd *abfd ATTRIBUTE_UNUSED, char *buf, bfd_vma value)
7369 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
7371 i_ehdrp = elf_elfheader (abfd);
7372 if (i_ehdrp == NULL)
7373 sprintf_vma (buf, value);
7376 if (i_ehdrp->e_ident[EI_CLASS] == ELFCLASS64)
7378 #if BFD_HOST_64BIT_LONG
7379 sprintf (buf, "%016lx", value);
7381 sprintf (buf, "%08lx%08lx", _bfd_int64_high (value),
7382 _bfd_int64_low (value));
7386 sprintf (buf, "%08lx", (unsigned long) (value & 0xffffffff));
7389 sprintf_vma (buf, value);
7394 _bfd_elf_fprintf_vma (bfd *abfd ATTRIBUTE_UNUSED, void *stream, bfd_vma value)
7397 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
7399 i_ehdrp = elf_elfheader (abfd);
7400 if (i_ehdrp == NULL)
7401 fprintf_vma ((FILE *) stream, value);
7404 if (i_ehdrp->e_ident[EI_CLASS] == ELFCLASS64)
7406 #if BFD_HOST_64BIT_LONG
7407 fprintf ((FILE *) stream, "%016lx", value);
7409 fprintf ((FILE *) stream, "%08lx%08lx",
7410 _bfd_int64_high (value), _bfd_int64_low (value));
7414 fprintf ((FILE *) stream, "%08lx",
7415 (unsigned long) (value & 0xffffffff));
7418 fprintf_vma ((FILE *) stream, value);
7422 enum elf_reloc_type_class
7423 _bfd_elf_reloc_type_class (const Elf_Internal_Rela *rela ATTRIBUTE_UNUSED)
7425 return reloc_class_normal;
7428 /* For RELA architectures, return the relocation value for a
7429 relocation against a local symbol. */
7432 _bfd_elf_rela_local_sym (bfd *abfd,
7433 Elf_Internal_Sym *sym,
7435 Elf_Internal_Rela *rel)
7437 asection *sec = *psec;
7440 relocation = (sec->output_section->vma
7441 + sec->output_offset
7443 if ((sec->flags & SEC_MERGE)
7444 && ELF_ST_TYPE (sym->st_info) == STT_SECTION
7445 && sec->sec_info_type == ELF_INFO_TYPE_MERGE)
7448 _bfd_merged_section_offset (abfd, psec,
7449 elf_section_data (sec)->sec_info,
7450 sym->st_value + rel->r_addend,
7453 rel->r_addend -= relocation;
7454 rel->r_addend += sec->output_section->vma + sec->output_offset;
7460 _bfd_elf_rel_local_sym (bfd *abfd,
7461 Elf_Internal_Sym *sym,
7465 asection *sec = *psec;
7467 if (sec->sec_info_type != ELF_INFO_TYPE_MERGE)
7468 return sym->st_value + addend;
7470 return _bfd_merged_section_offset (abfd, psec,
7471 elf_section_data (sec)->sec_info,
7472 sym->st_value + addend, 0);
7476 _bfd_elf_section_offset (bfd *abfd,
7477 struct bfd_link_info *info,
7481 struct bfd_elf_section_data *sec_data;
7483 sec_data = elf_section_data (sec);
7484 switch (sec->sec_info_type)
7486 case ELF_INFO_TYPE_STABS:
7487 return _bfd_stab_section_offset (abfd,
7488 &elf_hash_table (info)->merge_info,
7489 sec, &sec_data->sec_info, offset);
7490 case ELF_INFO_TYPE_EH_FRAME:
7491 return _bfd_elf_eh_frame_section_offset (abfd, sec, offset);
7497 /* Create a new BFD as if by bfd_openr. Rather than opening a file,
7498 reconstruct an ELF file by reading the segments out of remote memory
7499 based on the ELF file header at EHDR_VMA and the ELF program headers it
7500 points to. If not null, *LOADBASEP is filled in with the difference
7501 between the VMAs from which the segments were read, and the VMAs the
7502 file headers (and hence BFD's idea of each section's VMA) put them at.
7504 The function TARGET_READ_MEMORY is called to copy LEN bytes from the
7505 remote memory at target address VMA into the local buffer at MYADDR; it
7506 should return zero on success or an `errno' code on failure. TEMPL must
7507 be a BFD for an ELF target with the word size and byte order found in
7508 the remote memory. */
7511 bfd_elf_bfd_from_remote_memory
7515 int (*target_read_memory) (bfd_vma, char *, int))
7517 return (*get_elf_backend_data (templ)->elf_backend_bfd_from_remote_memory)
7518 (templ, ehdr_vma, loadbasep, target_read_memory);