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 { ".gnu.linkonce.b",15, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2030 { ".comment", 8, 0, SHT_PROGBITS, 0 },
2031 { ".data", 5, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2032 { ".data1", 6, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2033 { ".debug", 6, 0, SHT_PROGBITS, 0 },
2034 { ".fini", 5, 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2035 { ".init", 5, 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2036 { ".line", 5, 0, SHT_PROGBITS, 0 },
2037 { ".rodata", 7, -2, SHT_PROGBITS, SHF_ALLOC },
2038 { ".rodata1", 8, 0, SHT_PROGBITS, SHF_ALLOC },
2039 { ".tbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
2040 { ".tdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
2041 { ".text", 5, -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2042 { ".init_array", 11, 0, SHT_INIT_ARRAY, SHF_ALLOC + SHF_WRITE },
2043 { ".fini_array", 11, 0, SHT_FINI_ARRAY, SHF_ALLOC + SHF_WRITE },
2044 { ".preinit_array", 14, 0, SHT_PREINIT_ARRAY, SHF_ALLOC + SHF_WRITE },
2045 { ".debug_line", 11, 0, SHT_PROGBITS, 0 },
2046 { ".debug_info", 11, 0, SHT_PROGBITS, 0 },
2047 { ".debug_abbrev", 13, 0, SHT_PROGBITS, 0 },
2048 { ".debug_aranges", 14, 0, SHT_PROGBITS, 0 },
2049 { ".dynamic", 8, 0, SHT_DYNAMIC, SHF_ALLOC },
2050 { ".dynstr", 7, 0, SHT_STRTAB, SHF_ALLOC },
2051 { ".dynsym", 7, 0, SHT_DYNSYM, SHF_ALLOC },
2052 { ".got", 4, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2053 { ".hash", 5, 0, SHT_HASH, SHF_ALLOC },
2054 { ".interp", 7, 0, SHT_PROGBITS, 0 },
2055 { ".plt", 4, 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2056 { ".shstrtab", 9, 0, SHT_STRTAB, 0 },
2057 { ".strtab", 7, 0, SHT_STRTAB, 0 },
2058 { ".symtab", 7, 0, SHT_SYMTAB, 0 },
2059 { ".gnu.version", 12, 0, SHT_GNU_versym, 0 },
2060 { ".gnu.version_d", 14, 0, SHT_GNU_verdef, 0 },
2061 { ".gnu.version_r", 14, 0, SHT_GNU_verneed, 0 },
2062 { ".note", 5, -1, SHT_NOTE, 0 },
2063 { ".rela", 5, -1, SHT_RELA, 0 },
2064 { ".rel", 4, -1, SHT_REL, 0 },
2065 { ".stabstr", 5, 3, SHT_STRTAB, 0 },
2066 { NULL, 0, 0, 0, 0 }
2069 static const struct bfd_elf_special_section *
2070 get_special_section (const char *name,
2071 const struct bfd_elf_special_section *special_sections,
2075 int len = strlen (name);
2077 for (i = 0; special_sections[i].prefix != NULL; i++)
2080 int prefix_len = special_sections[i].prefix_length;
2082 if (len < prefix_len)
2084 if (memcmp (name, special_sections[i].prefix, prefix_len) != 0)
2087 suffix_len = special_sections[i].suffix_length;
2088 if (suffix_len <= 0)
2090 if (name[prefix_len] != 0)
2092 if (suffix_len == 0)
2094 if (name[prefix_len] != '.'
2095 && (suffix_len == -2
2096 || (rela && special_sections[i].type == SHT_REL)))
2102 if (len < prefix_len + suffix_len)
2104 if (memcmp (name + len - suffix_len,
2105 special_sections[i].prefix + prefix_len,
2109 return &special_sections[i];
2115 const struct bfd_elf_special_section *
2116 _bfd_elf_get_sec_type_attr (bfd *abfd, const char *name)
2118 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2119 const struct bfd_elf_special_section *ssect = NULL;
2121 /* See if this is one of the special sections. */
2124 unsigned int rela = bed->default_use_rela_p;
2126 if (bed->special_sections)
2127 ssect = get_special_section (name, bed->special_sections, rela);
2130 ssect = get_special_section (name, special_sections, rela);
2137 _bfd_elf_new_section_hook (bfd *abfd, asection *sec)
2139 struct bfd_elf_section_data *sdata;
2140 const struct bfd_elf_special_section *ssect;
2142 sdata = (struct bfd_elf_section_data *) sec->used_by_bfd;
2145 sdata = bfd_zalloc (abfd, sizeof (*sdata));
2148 sec->used_by_bfd = sdata;
2151 elf_section_type (sec) = SHT_NULL;
2152 ssect = _bfd_elf_get_sec_type_attr (abfd, sec->name);
2155 elf_section_type (sec) = ssect->type;
2156 elf_section_flags (sec) = ssect->attr;
2159 /* Indicate whether or not this section should use RELA relocations. */
2160 sec->use_rela_p = get_elf_backend_data (abfd)->default_use_rela_p;
2165 /* Create a new bfd section from an ELF program header.
2167 Since program segments have no names, we generate a synthetic name
2168 of the form segment<NUM>, where NUM is generally the index in the
2169 program header table. For segments that are split (see below) we
2170 generate the names segment<NUM>a and segment<NUM>b.
2172 Note that some program segments may have a file size that is different than
2173 (less than) the memory size. All this means is that at execution the
2174 system must allocate the amount of memory specified by the memory size,
2175 but only initialize it with the first "file size" bytes read from the
2176 file. This would occur for example, with program segments consisting
2177 of combined data+bss.
2179 To handle the above situation, this routine generates TWO bfd sections
2180 for the single program segment. The first has the length specified by
2181 the file size of the segment, and the second has the length specified
2182 by the difference between the two sizes. In effect, the segment is split
2183 into it's initialized and uninitialized parts.
2188 _bfd_elf_make_section_from_phdr (bfd *abfd,
2189 Elf_Internal_Phdr *hdr,
2191 const char *typename)
2199 split = ((hdr->p_memsz > 0)
2200 && (hdr->p_filesz > 0)
2201 && (hdr->p_memsz > hdr->p_filesz));
2202 sprintf (namebuf, "%s%d%s", typename, index, split ? "a" : "");
2203 len = strlen (namebuf) + 1;
2204 name = bfd_alloc (abfd, len);
2207 memcpy (name, namebuf, len);
2208 newsect = bfd_make_section (abfd, name);
2209 if (newsect == NULL)
2211 newsect->vma = hdr->p_vaddr;
2212 newsect->lma = hdr->p_paddr;
2213 newsect->_raw_size = hdr->p_filesz;
2214 newsect->filepos = hdr->p_offset;
2215 newsect->flags |= SEC_HAS_CONTENTS;
2216 newsect->alignment_power = bfd_log2 (hdr->p_align);
2217 if (hdr->p_type == PT_LOAD)
2219 newsect->flags |= SEC_ALLOC;
2220 newsect->flags |= SEC_LOAD;
2221 if (hdr->p_flags & PF_X)
2223 /* FIXME: all we known is that it has execute PERMISSION,
2225 newsect->flags |= SEC_CODE;
2228 if (!(hdr->p_flags & PF_W))
2230 newsect->flags |= SEC_READONLY;
2235 sprintf (namebuf, "%s%db", typename, index);
2236 len = strlen (namebuf) + 1;
2237 name = bfd_alloc (abfd, len);
2240 memcpy (name, namebuf, len);
2241 newsect = bfd_make_section (abfd, name);
2242 if (newsect == NULL)
2244 newsect->vma = hdr->p_vaddr + hdr->p_filesz;
2245 newsect->lma = hdr->p_paddr + hdr->p_filesz;
2246 newsect->_raw_size = hdr->p_memsz - hdr->p_filesz;
2247 if (hdr->p_type == PT_LOAD)
2249 newsect->flags |= SEC_ALLOC;
2250 if (hdr->p_flags & PF_X)
2251 newsect->flags |= SEC_CODE;
2253 if (!(hdr->p_flags & PF_W))
2254 newsect->flags |= SEC_READONLY;
2261 bfd_section_from_phdr (bfd *abfd, Elf_Internal_Phdr *hdr, int index)
2263 const struct elf_backend_data *bed;
2265 switch (hdr->p_type)
2268 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "null");
2271 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "load");
2274 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "dynamic");
2277 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "interp");
2280 if (! _bfd_elf_make_section_from_phdr (abfd, hdr, index, "note"))
2282 if (! elfcore_read_notes (abfd, hdr->p_offset, hdr->p_filesz))
2287 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "shlib");
2290 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "phdr");
2292 case PT_GNU_EH_FRAME:
2293 return _bfd_elf_make_section_from_phdr (abfd, hdr, index,
2297 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "stack");
2300 /* Check for any processor-specific program segment types.
2301 If no handler for them, default to making "segment" sections. */
2302 bed = get_elf_backend_data (abfd);
2303 if (bed->elf_backend_section_from_phdr)
2304 return (*bed->elf_backend_section_from_phdr) (abfd, hdr, index);
2306 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "segment");
2310 /* Initialize REL_HDR, the section-header for new section, containing
2311 relocations against ASECT. If USE_RELA_P is TRUE, we use RELA
2312 relocations; otherwise, we use REL relocations. */
2315 _bfd_elf_init_reloc_shdr (bfd *abfd,
2316 Elf_Internal_Shdr *rel_hdr,
2318 bfd_boolean use_rela_p)
2321 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2322 bfd_size_type amt = sizeof ".rela" + strlen (asect->name);
2324 name = bfd_alloc (abfd, amt);
2327 sprintf (name, "%s%s", use_rela_p ? ".rela" : ".rel", asect->name);
2329 (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd), name,
2331 if (rel_hdr->sh_name == (unsigned int) -1)
2333 rel_hdr->sh_type = use_rela_p ? SHT_RELA : SHT_REL;
2334 rel_hdr->sh_entsize = (use_rela_p
2335 ? bed->s->sizeof_rela
2336 : bed->s->sizeof_rel);
2337 rel_hdr->sh_addralign = 1 << bed->s->log_file_align;
2338 rel_hdr->sh_flags = 0;
2339 rel_hdr->sh_addr = 0;
2340 rel_hdr->sh_size = 0;
2341 rel_hdr->sh_offset = 0;
2346 /* Set up an ELF internal section header for a section. */
2349 elf_fake_sections (bfd *abfd, asection *asect, void *failedptrarg)
2351 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2352 bfd_boolean *failedptr = failedptrarg;
2353 Elf_Internal_Shdr *this_hdr;
2357 /* We already failed; just get out of the bfd_map_over_sections
2362 this_hdr = &elf_section_data (asect)->this_hdr;
2364 this_hdr->sh_name = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
2365 asect->name, FALSE);
2366 if (this_hdr->sh_name == (unsigned int) -1)
2372 this_hdr->sh_flags = 0;
2374 if ((asect->flags & SEC_ALLOC) != 0
2375 || asect->user_set_vma)
2376 this_hdr->sh_addr = asect->vma;
2378 this_hdr->sh_addr = 0;
2380 this_hdr->sh_offset = 0;
2381 this_hdr->sh_size = asect->_raw_size;
2382 this_hdr->sh_link = 0;
2383 this_hdr->sh_addralign = 1 << asect->alignment_power;
2384 /* The sh_entsize and sh_info fields may have been set already by
2385 copy_private_section_data. */
2387 this_hdr->bfd_section = asect;
2388 this_hdr->contents = NULL;
2390 /* If the section type is unspecified, we set it based on
2392 if (this_hdr->sh_type == SHT_NULL)
2394 if ((asect->flags & SEC_ALLOC) != 0
2395 && (((asect->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
2396 || (asect->flags & SEC_NEVER_LOAD) != 0))
2397 this_hdr->sh_type = SHT_NOBITS;
2399 this_hdr->sh_type = SHT_PROGBITS;
2402 switch (this_hdr->sh_type)
2408 case SHT_INIT_ARRAY:
2409 case SHT_FINI_ARRAY:
2410 case SHT_PREINIT_ARRAY:
2417 this_hdr->sh_entsize = bed->s->sizeof_hash_entry;
2421 this_hdr->sh_entsize = bed->s->sizeof_sym;
2425 this_hdr->sh_entsize = bed->s->sizeof_dyn;
2429 if (get_elf_backend_data (abfd)->may_use_rela_p)
2430 this_hdr->sh_entsize = bed->s->sizeof_rela;
2434 if (get_elf_backend_data (abfd)->may_use_rel_p)
2435 this_hdr->sh_entsize = bed->s->sizeof_rel;
2438 case SHT_GNU_versym:
2439 this_hdr->sh_entsize = sizeof (Elf_External_Versym);
2442 case SHT_GNU_verdef:
2443 this_hdr->sh_entsize = 0;
2444 /* objcopy or strip will copy over sh_info, but may not set
2445 cverdefs. The linker will set cverdefs, but sh_info will be
2447 if (this_hdr->sh_info == 0)
2448 this_hdr->sh_info = elf_tdata (abfd)->cverdefs;
2450 BFD_ASSERT (elf_tdata (abfd)->cverdefs == 0
2451 || this_hdr->sh_info == elf_tdata (abfd)->cverdefs);
2454 case SHT_GNU_verneed:
2455 this_hdr->sh_entsize = 0;
2456 /* objcopy or strip will copy over sh_info, but may not set
2457 cverrefs. The linker will set cverrefs, but sh_info will be
2459 if (this_hdr->sh_info == 0)
2460 this_hdr->sh_info = elf_tdata (abfd)->cverrefs;
2462 BFD_ASSERT (elf_tdata (abfd)->cverrefs == 0
2463 || this_hdr->sh_info == elf_tdata (abfd)->cverrefs);
2467 this_hdr->sh_entsize = 4;
2471 if ((asect->flags & SEC_ALLOC) != 0)
2472 this_hdr->sh_flags |= SHF_ALLOC;
2473 if ((asect->flags & SEC_READONLY) == 0)
2474 this_hdr->sh_flags |= SHF_WRITE;
2475 if ((asect->flags & SEC_CODE) != 0)
2476 this_hdr->sh_flags |= SHF_EXECINSTR;
2477 if ((asect->flags & SEC_MERGE) != 0)
2479 this_hdr->sh_flags |= SHF_MERGE;
2480 this_hdr->sh_entsize = asect->entsize;
2481 if ((asect->flags & SEC_STRINGS) != 0)
2482 this_hdr->sh_flags |= SHF_STRINGS;
2484 if ((asect->flags & SEC_GROUP) == 0 && elf_group_name (asect) != NULL)
2485 this_hdr->sh_flags |= SHF_GROUP;
2486 if ((asect->flags & SEC_THREAD_LOCAL) != 0)
2488 this_hdr->sh_flags |= SHF_TLS;
2489 if (asect->_raw_size == 0 && (asect->flags & SEC_HAS_CONTENTS) == 0)
2491 struct bfd_link_order *o;
2493 this_hdr->sh_size = 0;
2494 for (o = asect->link_order_head; o != NULL; o = o->next)
2495 if (this_hdr->sh_size < o->offset + o->size)
2496 this_hdr->sh_size = o->offset + o->size;
2497 if (this_hdr->sh_size)
2498 this_hdr->sh_type = SHT_NOBITS;
2502 /* Check for processor-specific section types. */
2503 if (bed->elf_backend_fake_sections
2504 && !(*bed->elf_backend_fake_sections) (abfd, this_hdr, asect))
2507 /* If the section has relocs, set up a section header for the
2508 SHT_REL[A] section. If two relocation sections are required for
2509 this section, it is up to the processor-specific back-end to
2510 create the other. */
2511 if ((asect->flags & SEC_RELOC) != 0
2512 && !_bfd_elf_init_reloc_shdr (abfd,
2513 &elf_section_data (asect)->rel_hdr,
2519 /* Fill in the contents of a SHT_GROUP section. */
2522 bfd_elf_set_group_contents (bfd *abfd, asection *sec, void *failedptrarg)
2524 bfd_boolean *failedptr = failedptrarg;
2525 unsigned long symindx;
2526 asection *elt, *first;
2528 struct bfd_link_order *l;
2531 if (elf_section_data (sec)->this_hdr.sh_type != SHT_GROUP
2536 if (elf_group_id (sec) != NULL)
2537 symindx = elf_group_id (sec)->udata.i;
2541 /* If called from the assembler, swap_out_syms will have set up
2542 elf_section_syms; If called for "ld -r", use target_index. */
2543 if (elf_section_syms (abfd) != NULL)
2544 symindx = elf_section_syms (abfd)[sec->index]->udata.i;
2546 symindx = sec->target_index;
2548 elf_section_data (sec)->this_hdr.sh_info = symindx;
2550 /* The contents won't be allocated for "ld -r" or objcopy. */
2552 if (sec->contents == NULL)
2555 sec->contents = bfd_alloc (abfd, sec->_raw_size);
2557 /* Arrange for the section to be written out. */
2558 elf_section_data (sec)->this_hdr.contents = sec->contents;
2559 if (sec->contents == NULL)
2566 loc = sec->contents + sec->_raw_size;
2568 /* Get the pointer to the first section in the group that gas
2569 squirreled away here. objcopy arranges for this to be set to the
2570 start of the input section group. */
2571 first = elt = elf_next_in_group (sec);
2573 /* First element is a flag word. Rest of section is elf section
2574 indices for all the sections of the group. Write them backwards
2575 just to keep the group in the same order as given in .section
2576 directives, not that it matters. */
2585 s = s->output_section;
2588 idx = elf_section_data (s)->this_idx;
2589 H_PUT_32 (abfd, idx, loc);
2590 elt = elf_next_in_group (elt);
2595 /* If this is a relocatable link, then the above did nothing because
2596 SEC is the output section. Look through the input sections
2598 for (l = sec->link_order_head; l != NULL; l = l->next)
2599 if (l->type == bfd_indirect_link_order
2600 && (elt = elf_next_in_group (l->u.indirect.section)) != NULL)
2605 elf_section_data (elt->output_section)->this_idx, loc);
2606 elt = elf_next_in_group (elt);
2607 /* During a relocatable link, the lists are circular. */
2609 while (elt != elf_next_in_group (l->u.indirect.section));
2611 /* With ld -r, merging SHT_GROUP sections results in wasted space
2612 due to allowing for the flag word on each input. We may well
2613 duplicate entries too. */
2614 while ((loc -= 4) > sec->contents)
2615 H_PUT_32 (abfd, 0, loc);
2617 if (loc != sec->contents)
2620 H_PUT_32 (abfd, sec->flags & SEC_LINK_ONCE ? GRP_COMDAT : 0, loc);
2623 /* Assign all ELF section numbers. The dummy first section is handled here
2624 too. The link/info pointers for the standard section types are filled
2625 in here too, while we're at it. */
2628 assign_section_numbers (bfd *abfd)
2630 struct elf_obj_tdata *t = elf_tdata (abfd);
2632 unsigned int section_number, secn;
2633 Elf_Internal_Shdr **i_shdrp;
2638 _bfd_elf_strtab_clear_all_refs (elf_shstrtab (abfd));
2640 for (sec = abfd->sections; sec; sec = sec->next)
2642 struct bfd_elf_section_data *d = elf_section_data (sec);
2644 if (section_number == SHN_LORESERVE)
2645 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2646 d->this_idx = section_number++;
2647 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->this_hdr.sh_name);
2648 if ((sec->flags & SEC_RELOC) == 0)
2652 if (section_number == SHN_LORESERVE)
2653 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2654 d->rel_idx = section_number++;
2655 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rel_hdr.sh_name);
2660 if (section_number == SHN_LORESERVE)
2661 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2662 d->rel_idx2 = section_number++;
2663 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rel_hdr2->sh_name);
2669 if (section_number == SHN_LORESERVE)
2670 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2671 t->shstrtab_section = section_number++;
2672 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->shstrtab_hdr.sh_name);
2673 elf_elfheader (abfd)->e_shstrndx = t->shstrtab_section;
2675 if (bfd_get_symcount (abfd) > 0)
2677 if (section_number == SHN_LORESERVE)
2678 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2679 t->symtab_section = section_number++;
2680 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->symtab_hdr.sh_name);
2681 if (section_number > SHN_LORESERVE - 2)
2683 if (section_number == SHN_LORESERVE)
2684 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2685 t->symtab_shndx_section = section_number++;
2686 t->symtab_shndx_hdr.sh_name
2687 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
2688 ".symtab_shndx", FALSE);
2689 if (t->symtab_shndx_hdr.sh_name == (unsigned int) -1)
2692 if (section_number == SHN_LORESERVE)
2693 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2694 t->strtab_section = section_number++;
2695 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->strtab_hdr.sh_name);
2698 _bfd_elf_strtab_finalize (elf_shstrtab (abfd));
2699 t->shstrtab_hdr.sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
2701 elf_numsections (abfd) = section_number;
2702 elf_elfheader (abfd)->e_shnum = section_number;
2703 if (section_number > SHN_LORESERVE)
2704 elf_elfheader (abfd)->e_shnum -= SHN_HIRESERVE + 1 - SHN_LORESERVE;
2706 /* Set up the list of section header pointers, in agreement with the
2708 amt = section_number * sizeof (Elf_Internal_Shdr *);
2709 i_shdrp = bfd_zalloc (abfd, amt);
2710 if (i_shdrp == NULL)
2713 amt = sizeof (Elf_Internal_Shdr);
2714 i_shdrp[0] = bfd_zalloc (abfd, amt);
2715 if (i_shdrp[0] == NULL)
2717 bfd_release (abfd, i_shdrp);
2721 elf_elfsections (abfd) = i_shdrp;
2723 i_shdrp[t->shstrtab_section] = &t->shstrtab_hdr;
2724 if (bfd_get_symcount (abfd) > 0)
2726 i_shdrp[t->symtab_section] = &t->symtab_hdr;
2727 if (elf_numsections (abfd) > SHN_LORESERVE)
2729 i_shdrp[t->symtab_shndx_section] = &t->symtab_shndx_hdr;
2730 t->symtab_shndx_hdr.sh_link = t->symtab_section;
2732 i_shdrp[t->strtab_section] = &t->strtab_hdr;
2733 t->symtab_hdr.sh_link = t->strtab_section;
2735 for (sec = abfd->sections; sec; sec = sec->next)
2737 struct bfd_elf_section_data *d = elf_section_data (sec);
2741 i_shdrp[d->this_idx] = &d->this_hdr;
2742 if (d->rel_idx != 0)
2743 i_shdrp[d->rel_idx] = &d->rel_hdr;
2744 if (d->rel_idx2 != 0)
2745 i_shdrp[d->rel_idx2] = d->rel_hdr2;
2747 /* Fill in the sh_link and sh_info fields while we're at it. */
2749 /* sh_link of a reloc section is the section index of the symbol
2750 table. sh_info is the section index of the section to which
2751 the relocation entries apply. */
2752 if (d->rel_idx != 0)
2754 d->rel_hdr.sh_link = t->symtab_section;
2755 d->rel_hdr.sh_info = d->this_idx;
2757 if (d->rel_idx2 != 0)
2759 d->rel_hdr2->sh_link = t->symtab_section;
2760 d->rel_hdr2->sh_info = d->this_idx;
2763 switch (d->this_hdr.sh_type)
2767 /* A reloc section which we are treating as a normal BFD
2768 section. sh_link is the section index of the symbol
2769 table. sh_info is the section index of the section to
2770 which the relocation entries apply. We assume that an
2771 allocated reloc section uses the dynamic symbol table.
2772 FIXME: How can we be sure? */
2773 s = bfd_get_section_by_name (abfd, ".dynsym");
2775 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
2777 /* We look up the section the relocs apply to by name. */
2779 if (d->this_hdr.sh_type == SHT_REL)
2783 s = bfd_get_section_by_name (abfd, name);
2785 d->this_hdr.sh_info = elf_section_data (s)->this_idx;
2789 /* We assume that a section named .stab*str is a stabs
2790 string section. We look for a section with the same name
2791 but without the trailing ``str'', and set its sh_link
2792 field to point to this section. */
2793 if (strncmp (sec->name, ".stab", sizeof ".stab" - 1) == 0
2794 && strcmp (sec->name + strlen (sec->name) - 3, "str") == 0)
2799 len = strlen (sec->name);
2800 alc = bfd_malloc (len - 2);
2803 memcpy (alc, sec->name, len - 3);
2804 alc[len - 3] = '\0';
2805 s = bfd_get_section_by_name (abfd, alc);
2809 elf_section_data (s)->this_hdr.sh_link = d->this_idx;
2811 /* This is a .stab section. */
2812 if (elf_section_data (s)->this_hdr.sh_entsize == 0)
2813 elf_section_data (s)->this_hdr.sh_entsize
2814 = 4 + 2 * bfd_get_arch_size (abfd) / 8;
2821 case SHT_GNU_verneed:
2822 case SHT_GNU_verdef:
2823 /* sh_link is the section header index of the string table
2824 used for the dynamic entries, or the symbol table, or the
2826 s = bfd_get_section_by_name (abfd, ".dynstr");
2828 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
2832 case SHT_GNU_versym:
2833 /* sh_link is the section header index of the symbol table
2834 this hash table or version table is for. */
2835 s = bfd_get_section_by_name (abfd, ".dynsym");
2837 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
2841 d->this_hdr.sh_link = t->symtab_section;
2845 for (secn = 1; secn < section_number; ++secn)
2846 if (i_shdrp[secn] == NULL)
2847 i_shdrp[secn] = i_shdrp[0];
2849 i_shdrp[secn]->sh_name = _bfd_elf_strtab_offset (elf_shstrtab (abfd),
2850 i_shdrp[secn]->sh_name);
2854 /* Map symbol from it's internal number to the external number, moving
2855 all local symbols to be at the head of the list. */
2858 sym_is_global (bfd *abfd, asymbol *sym)
2860 /* If the backend has a special mapping, use it. */
2861 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2862 if (bed->elf_backend_sym_is_global)
2863 return (*bed->elf_backend_sym_is_global) (abfd, sym);
2865 return ((sym->flags & (BSF_GLOBAL | BSF_WEAK)) != 0
2866 || bfd_is_und_section (bfd_get_section (sym))
2867 || bfd_is_com_section (bfd_get_section (sym)));
2871 elf_map_symbols (bfd *abfd)
2873 unsigned int symcount = bfd_get_symcount (abfd);
2874 asymbol **syms = bfd_get_outsymbols (abfd);
2875 asymbol **sect_syms;
2876 unsigned int num_locals = 0;
2877 unsigned int num_globals = 0;
2878 unsigned int num_locals2 = 0;
2879 unsigned int num_globals2 = 0;
2887 fprintf (stderr, "elf_map_symbols\n");
2891 for (asect = abfd->sections; asect; asect = asect->next)
2893 if (max_index < asect->index)
2894 max_index = asect->index;
2898 amt = max_index * sizeof (asymbol *);
2899 sect_syms = bfd_zalloc (abfd, amt);
2900 if (sect_syms == NULL)
2902 elf_section_syms (abfd) = sect_syms;
2903 elf_num_section_syms (abfd) = max_index;
2905 /* Init sect_syms entries for any section symbols we have already
2906 decided to output. */
2907 for (idx = 0; idx < symcount; idx++)
2909 asymbol *sym = syms[idx];
2911 if ((sym->flags & BSF_SECTION_SYM) != 0
2918 if (sec->owner != NULL)
2920 if (sec->owner != abfd)
2922 if (sec->output_offset != 0)
2925 sec = sec->output_section;
2927 /* Empty sections in the input files may have had a
2928 section symbol created for them. (See the comment
2929 near the end of _bfd_generic_link_output_symbols in
2930 linker.c). If the linker script discards such
2931 sections then we will reach this point. Since we know
2932 that we cannot avoid this case, we detect it and skip
2933 the abort and the assignment to the sect_syms array.
2934 To reproduce this particular case try running the
2935 linker testsuite test ld-scripts/weak.exp for an ELF
2936 port that uses the generic linker. */
2937 if (sec->owner == NULL)
2940 BFD_ASSERT (sec->owner == abfd);
2942 sect_syms[sec->index] = syms[idx];
2947 /* Classify all of the symbols. */
2948 for (idx = 0; idx < symcount; idx++)
2950 if (!sym_is_global (abfd, syms[idx]))
2956 /* We will be adding a section symbol for each BFD section. Most normal
2957 sections will already have a section symbol in outsymbols, but
2958 eg. SHT_GROUP sections will not, and we need the section symbol mapped
2959 at least in that case. */
2960 for (asect = abfd->sections; asect; asect = asect->next)
2962 if (sect_syms[asect->index] == NULL)
2964 if (!sym_is_global (abfd, asect->symbol))
2971 /* Now sort the symbols so the local symbols are first. */
2972 amt = (num_locals + num_globals) * sizeof (asymbol *);
2973 new_syms = bfd_alloc (abfd, amt);
2975 if (new_syms == NULL)
2978 for (idx = 0; idx < symcount; idx++)
2980 asymbol *sym = syms[idx];
2983 if (!sym_is_global (abfd, sym))
2986 i = num_locals + num_globals2++;
2988 sym->udata.i = i + 1;
2990 for (asect = abfd->sections; asect; asect = asect->next)
2992 if (sect_syms[asect->index] == NULL)
2994 asymbol *sym = asect->symbol;
2997 sect_syms[asect->index] = sym;
2998 if (!sym_is_global (abfd, sym))
3001 i = num_locals + num_globals2++;
3003 sym->udata.i = i + 1;
3007 bfd_set_symtab (abfd, new_syms, num_locals + num_globals);
3009 elf_num_locals (abfd) = num_locals;
3010 elf_num_globals (abfd) = num_globals;
3014 /* Align to the maximum file alignment that could be required for any
3015 ELF data structure. */
3017 static inline file_ptr
3018 align_file_position (file_ptr off, int align)
3020 return (off + align - 1) & ~(align - 1);
3023 /* Assign a file position to a section, optionally aligning to the
3024 required section alignment. */
3027 _bfd_elf_assign_file_position_for_section (Elf_Internal_Shdr *i_shdrp,
3035 al = i_shdrp->sh_addralign;
3037 offset = BFD_ALIGN (offset, al);
3039 i_shdrp->sh_offset = offset;
3040 if (i_shdrp->bfd_section != NULL)
3041 i_shdrp->bfd_section->filepos = offset;
3042 if (i_shdrp->sh_type != SHT_NOBITS)
3043 offset += i_shdrp->sh_size;
3047 /* Compute the file positions we are going to put the sections at, and
3048 otherwise prepare to begin writing out the ELF file. If LINK_INFO
3049 is not NULL, this is being called by the ELF backend linker. */
3052 _bfd_elf_compute_section_file_positions (bfd *abfd,
3053 struct bfd_link_info *link_info)
3055 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3057 struct bfd_strtab_hash *strtab;
3058 Elf_Internal_Shdr *shstrtab_hdr;
3060 if (abfd->output_has_begun)
3063 /* Do any elf backend specific processing first. */
3064 if (bed->elf_backend_begin_write_processing)
3065 (*bed->elf_backend_begin_write_processing) (abfd, link_info);
3067 if (! prep_headers (abfd))
3070 /* Post process the headers if necessary. */
3071 if (bed->elf_backend_post_process_headers)
3072 (*bed->elf_backend_post_process_headers) (abfd, link_info);
3075 bfd_map_over_sections (abfd, elf_fake_sections, &failed);
3079 if (!assign_section_numbers (abfd))
3082 /* The backend linker builds symbol table information itself. */
3083 if (link_info == NULL && bfd_get_symcount (abfd) > 0)
3085 /* Non-zero if doing a relocatable link. */
3086 int relocatable_p = ! (abfd->flags & (EXEC_P | DYNAMIC));
3088 if (! swap_out_syms (abfd, &strtab, relocatable_p))
3092 if (link_info == NULL)
3094 bfd_map_over_sections (abfd, bfd_elf_set_group_contents, &failed);
3099 shstrtab_hdr = &elf_tdata (abfd)->shstrtab_hdr;
3100 /* sh_name was set in prep_headers. */
3101 shstrtab_hdr->sh_type = SHT_STRTAB;
3102 shstrtab_hdr->sh_flags = 0;
3103 shstrtab_hdr->sh_addr = 0;
3104 shstrtab_hdr->sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
3105 shstrtab_hdr->sh_entsize = 0;
3106 shstrtab_hdr->sh_link = 0;
3107 shstrtab_hdr->sh_info = 0;
3108 /* sh_offset is set in assign_file_positions_except_relocs. */
3109 shstrtab_hdr->sh_addralign = 1;
3111 if (!assign_file_positions_except_relocs (abfd, link_info))
3114 if (link_info == NULL && bfd_get_symcount (abfd) > 0)
3117 Elf_Internal_Shdr *hdr;
3119 off = elf_tdata (abfd)->next_file_pos;
3121 hdr = &elf_tdata (abfd)->symtab_hdr;
3122 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3124 hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
3125 if (hdr->sh_size != 0)
3126 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3128 hdr = &elf_tdata (abfd)->strtab_hdr;
3129 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3131 elf_tdata (abfd)->next_file_pos = off;
3133 /* Now that we know where the .strtab section goes, write it
3135 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
3136 || ! _bfd_stringtab_emit (abfd, strtab))
3138 _bfd_stringtab_free (strtab);
3141 abfd->output_has_begun = TRUE;
3146 /* Create a mapping from a set of sections to a program segment. */
3148 static struct elf_segment_map *
3149 make_mapping (bfd *abfd,
3150 asection **sections,
3155 struct elf_segment_map *m;
3160 amt = sizeof (struct elf_segment_map);
3161 amt += (to - from - 1) * sizeof (asection *);
3162 m = bfd_zalloc (abfd, amt);
3166 m->p_type = PT_LOAD;
3167 for (i = from, hdrpp = sections + from; i < to; i++, hdrpp++)
3168 m->sections[i - from] = *hdrpp;
3169 m->count = to - from;
3171 if (from == 0 && phdr)
3173 /* Include the headers in the first PT_LOAD segment. */
3174 m->includes_filehdr = 1;
3175 m->includes_phdrs = 1;
3181 /* Set up a mapping from BFD sections to program segments. */
3184 map_sections_to_segments (bfd *abfd)
3186 asection **sections = NULL;
3190 struct elf_segment_map *mfirst;
3191 struct elf_segment_map **pm;
3192 struct elf_segment_map *m;
3195 unsigned int phdr_index;
3196 bfd_vma maxpagesize;
3198 bfd_boolean phdr_in_segment = TRUE;
3199 bfd_boolean writable;
3201 asection *first_tls = NULL;
3202 asection *dynsec, *eh_frame_hdr;
3205 if (elf_tdata (abfd)->segment_map != NULL)
3208 if (bfd_count_sections (abfd) == 0)
3211 /* Select the allocated sections, and sort them. */
3213 amt = bfd_count_sections (abfd) * sizeof (asection *);
3214 sections = bfd_malloc (amt);
3215 if (sections == NULL)
3219 for (s = abfd->sections; s != NULL; s = s->next)
3221 if ((s->flags & SEC_ALLOC) != 0)
3227 BFD_ASSERT (i <= bfd_count_sections (abfd));
3230 qsort (sections, (size_t) count, sizeof (asection *), elf_sort_sections);
3232 /* Build the mapping. */
3237 /* If we have a .interp section, then create a PT_PHDR segment for
3238 the program headers and a PT_INTERP segment for the .interp
3240 s = bfd_get_section_by_name (abfd, ".interp");
3241 if (s != NULL && (s->flags & SEC_LOAD) != 0)
3243 amt = sizeof (struct elf_segment_map);
3244 m = bfd_zalloc (abfd, amt);
3248 m->p_type = PT_PHDR;
3249 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
3250 m->p_flags = PF_R | PF_X;
3251 m->p_flags_valid = 1;
3252 m->includes_phdrs = 1;
3257 amt = sizeof (struct elf_segment_map);
3258 m = bfd_zalloc (abfd, amt);
3262 m->p_type = PT_INTERP;
3270 /* Look through the sections. We put sections in the same program
3271 segment when the start of the second section can be placed within
3272 a few bytes of the end of the first section. */
3276 maxpagesize = get_elf_backend_data (abfd)->maxpagesize;
3278 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
3280 && (dynsec->flags & SEC_LOAD) == 0)
3283 /* Deal with -Ttext or something similar such that the first section
3284 is not adjacent to the program headers. This is an
3285 approximation, since at this point we don't know exactly how many
3286 program headers we will need. */
3289 bfd_size_type phdr_size;
3291 phdr_size = elf_tdata (abfd)->program_header_size;
3293 phdr_size = get_elf_backend_data (abfd)->s->sizeof_phdr;
3294 if ((abfd->flags & D_PAGED) == 0
3295 || sections[0]->lma < phdr_size
3296 || sections[0]->lma % maxpagesize < phdr_size % maxpagesize)
3297 phdr_in_segment = FALSE;
3300 for (i = 0, hdrpp = sections; i < count; i++, hdrpp++)
3303 bfd_boolean new_segment;
3307 /* See if this section and the last one will fit in the same
3310 if (last_hdr == NULL)
3312 /* If we don't have a segment yet, then we don't need a new
3313 one (we build the last one after this loop). */
3314 new_segment = FALSE;
3316 else if (last_hdr->lma - last_hdr->vma != hdr->lma - hdr->vma)
3318 /* If this section has a different relation between the
3319 virtual address and the load address, then we need a new
3323 else if (BFD_ALIGN (last_hdr->lma + last_size, maxpagesize)
3324 < BFD_ALIGN (hdr->lma, maxpagesize))
3326 /* If putting this section in this segment would force us to
3327 skip a page in the segment, then we need a new segment. */
3330 else if ((last_hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0
3331 && (hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) != 0)
3333 /* We don't want to put a loadable section after a
3334 nonloadable section in the same segment.
3335 Consider .tbss sections as loadable for this purpose. */
3338 else if ((abfd->flags & D_PAGED) == 0)
3340 /* If the file is not demand paged, which means that we
3341 don't require the sections to be correctly aligned in the
3342 file, then there is no other reason for a new segment. */
3343 new_segment = FALSE;
3346 && (hdr->flags & SEC_READONLY) == 0
3347 && (((last_hdr->lma + last_size - 1)
3348 & ~(maxpagesize - 1))
3349 != (hdr->lma & ~(maxpagesize - 1))))
3351 /* We don't want to put a writable section in a read only
3352 segment, unless they are on the same page in memory
3353 anyhow. We already know that the last section does not
3354 bring us past the current section on the page, so the
3355 only case in which the new section is not on the same
3356 page as the previous section is when the previous section
3357 ends precisely on a page boundary. */
3362 /* Otherwise, we can use the same segment. */
3363 new_segment = FALSE;
3368 if ((hdr->flags & SEC_READONLY) == 0)
3371 /* .tbss sections effectively have zero size. */
3372 if ((hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD)) != SEC_THREAD_LOCAL)
3373 last_size = hdr->_raw_size;
3379 /* We need a new program segment. We must create a new program
3380 header holding all the sections from phdr_index until hdr. */
3382 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
3389 if ((hdr->flags & SEC_READONLY) == 0)
3395 /* .tbss sections effectively have zero size. */
3396 if ((hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD)) != SEC_THREAD_LOCAL)
3397 last_size = hdr->_raw_size;
3401 phdr_in_segment = FALSE;
3404 /* Create a final PT_LOAD program segment. */
3405 if (last_hdr != NULL)
3407 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
3415 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
3418 amt = sizeof (struct elf_segment_map);
3419 m = bfd_zalloc (abfd, amt);
3423 m->p_type = PT_DYNAMIC;
3425 m->sections[0] = dynsec;
3431 /* For each loadable .note section, add a PT_NOTE segment. We don't
3432 use bfd_get_section_by_name, because if we link together
3433 nonloadable .note sections and loadable .note sections, we will
3434 generate two .note sections in the output file. FIXME: Using
3435 names for section types is bogus anyhow. */
3436 for (s = abfd->sections; s != NULL; s = s->next)
3438 if ((s->flags & SEC_LOAD) != 0
3439 && strncmp (s->name, ".note", 5) == 0)
3441 amt = sizeof (struct elf_segment_map);
3442 m = bfd_zalloc (abfd, amt);
3446 m->p_type = PT_NOTE;
3453 if (s->flags & SEC_THREAD_LOCAL)
3461 /* If there are any SHF_TLS output sections, add PT_TLS segment. */
3466 amt = sizeof (struct elf_segment_map);
3467 amt += (tls_count - 1) * sizeof (asection *);
3468 m = bfd_zalloc (abfd, amt);
3473 m->count = tls_count;
3474 /* Mandated PF_R. */
3476 m->p_flags_valid = 1;
3477 for (i = 0; i < tls_count; ++i)
3479 BFD_ASSERT (first_tls->flags & SEC_THREAD_LOCAL);
3480 m->sections[i] = first_tls;
3481 first_tls = first_tls->next;
3488 /* If there is a .eh_frame_hdr section, throw in a PT_GNU_EH_FRAME
3490 eh_frame_hdr = elf_tdata (abfd)->eh_frame_hdr;
3491 if (eh_frame_hdr != NULL
3492 && (eh_frame_hdr->output_section->flags & SEC_LOAD) != 0)
3494 amt = sizeof (struct elf_segment_map);
3495 m = bfd_zalloc (abfd, amt);
3499 m->p_type = PT_GNU_EH_FRAME;
3501 m->sections[0] = eh_frame_hdr->output_section;
3507 if (elf_tdata (abfd)->stack_flags)
3509 amt = sizeof (struct elf_segment_map);
3510 m = bfd_zalloc (abfd, amt);
3514 m->p_type = PT_GNU_STACK;
3515 m->p_flags = elf_tdata (abfd)->stack_flags;
3516 m->p_flags_valid = 1;
3525 elf_tdata (abfd)->segment_map = mfirst;
3529 if (sections != NULL)
3534 /* Sort sections by address. */
3537 elf_sort_sections (const void *arg1, const void *arg2)
3539 const asection *sec1 = *(const asection **) arg1;
3540 const asection *sec2 = *(const asection **) arg2;
3541 bfd_size_type size1, size2;
3543 /* Sort by LMA first, since this is the address used to
3544 place the section into a segment. */
3545 if (sec1->lma < sec2->lma)
3547 else if (sec1->lma > sec2->lma)
3550 /* Then sort by VMA. Normally the LMA and the VMA will be
3551 the same, and this will do nothing. */
3552 if (sec1->vma < sec2->vma)
3554 else if (sec1->vma > sec2->vma)
3557 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
3559 #define TOEND(x) (((x)->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0)
3565 /* If the indicies are the same, do not return 0
3566 here, but continue to try the next comparison. */
3567 if (sec1->target_index - sec2->target_index != 0)
3568 return sec1->target_index - sec2->target_index;
3573 else if (TOEND (sec2))
3578 /* Sort by size, to put zero sized sections
3579 before others at the same address. */
3581 size1 = (sec1->flags & SEC_LOAD) ? sec1->_raw_size : 0;
3582 size2 = (sec2->flags & SEC_LOAD) ? sec2->_raw_size : 0;
3589 return sec1->target_index - sec2->target_index;
3592 /* Ian Lance Taylor writes:
3594 We shouldn't be using % with a negative signed number. That's just
3595 not good. We have to make sure either that the number is not
3596 negative, or that the number has an unsigned type. When the types
3597 are all the same size they wind up as unsigned. When file_ptr is a
3598 larger signed type, the arithmetic winds up as signed long long,
3601 What we're trying to say here is something like ``increase OFF by
3602 the least amount that will cause it to be equal to the VMA modulo
3604 /* In other words, something like:
3606 vma_offset = m->sections[0]->vma % bed->maxpagesize;
3607 off_offset = off % bed->maxpagesize;
3608 if (vma_offset < off_offset)
3609 adjustment = vma_offset + bed->maxpagesize - off_offset;
3611 adjustment = vma_offset - off_offset;
3613 which can can be collapsed into the expression below. */
3616 vma_page_aligned_bias (bfd_vma vma, ufile_ptr off, bfd_vma maxpagesize)
3618 return ((vma - off) % maxpagesize);
3621 /* Assign file positions to the sections based on the mapping from
3622 sections to segments. This function also sets up some fields in
3623 the file header, and writes out the program headers. */
3626 assign_file_positions_for_segments (bfd *abfd, struct bfd_link_info *link_info)
3628 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3630 struct elf_segment_map *m;
3632 Elf_Internal_Phdr *phdrs;
3634 bfd_vma filehdr_vaddr, filehdr_paddr;
3635 bfd_vma phdrs_vaddr, phdrs_paddr;
3636 Elf_Internal_Phdr *p;
3639 if (elf_tdata (abfd)->segment_map == NULL)
3641 if (! map_sections_to_segments (abfd))
3646 /* The placement algorithm assumes that non allocated sections are
3647 not in PT_LOAD segments. We ensure this here by removing such
3648 sections from the segment map. */
3649 for (m = elf_tdata (abfd)->segment_map;
3653 unsigned int new_count;
3656 if (m->p_type != PT_LOAD)
3660 for (i = 0; i < m->count; i ++)
3662 if ((m->sections[i]->flags & SEC_ALLOC) != 0)
3665 m->sections[new_count] = m->sections[i];
3671 if (new_count != m->count)
3672 m->count = new_count;
3676 if (bed->elf_backend_modify_segment_map)
3678 if (! (*bed->elf_backend_modify_segment_map) (abfd, link_info))
3683 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
3686 elf_elfheader (abfd)->e_phoff = bed->s->sizeof_ehdr;
3687 elf_elfheader (abfd)->e_phentsize = bed->s->sizeof_phdr;
3688 elf_elfheader (abfd)->e_phnum = count;
3693 /* If we already counted the number of program segments, make sure
3694 that we allocated enough space. This happens when SIZEOF_HEADERS
3695 is used in a linker script. */
3696 alloc = elf_tdata (abfd)->program_header_size / bed->s->sizeof_phdr;
3697 if (alloc != 0 && count > alloc)
3699 ((*_bfd_error_handler)
3700 (_("%s: Not enough room for program headers (allocated %u, need %u)"),
3701 bfd_get_filename (abfd), alloc, count));
3702 bfd_set_error (bfd_error_bad_value);
3709 amt = alloc * sizeof (Elf_Internal_Phdr);
3710 phdrs = bfd_alloc (abfd, amt);
3714 off = bed->s->sizeof_ehdr;
3715 off += alloc * bed->s->sizeof_phdr;
3722 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
3729 /* If elf_segment_map is not from map_sections_to_segments, the
3730 sections may not be correctly ordered. NOTE: sorting should
3731 not be done to the PT_NOTE section of a corefile, which may
3732 contain several pseudo-sections artificially created by bfd.
3733 Sorting these pseudo-sections breaks things badly. */
3735 && !(elf_elfheader (abfd)->e_type == ET_CORE
3736 && m->p_type == PT_NOTE))
3737 qsort (m->sections, (size_t) m->count, sizeof (asection *),
3740 p->p_type = m->p_type;
3741 p->p_flags = m->p_flags;
3743 if (p->p_type == PT_LOAD
3745 && (m->sections[0]->flags & SEC_ALLOC) != 0)
3747 if ((abfd->flags & D_PAGED) != 0)
3748 off += vma_page_aligned_bias (m->sections[0]->vma, off,
3752 bfd_size_type align;
3755 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
3757 bfd_size_type secalign;
3759 secalign = bfd_get_section_alignment (abfd, *secpp);
3760 if (secalign > align)
3764 off += vma_page_aligned_bias (m->sections[0]->vma, off,
3772 p->p_vaddr = m->sections[0]->vma;
3774 if (m->p_paddr_valid)
3775 p->p_paddr = m->p_paddr;
3776 else if (m->count == 0)
3779 p->p_paddr = m->sections[0]->lma;
3781 if (p->p_type == PT_LOAD
3782 && (abfd->flags & D_PAGED) != 0)
3783 p->p_align = bed->maxpagesize;
3784 else if (m->count == 0)
3785 p->p_align = 1 << bed->s->log_file_align;
3793 if (m->includes_filehdr)
3795 if (! m->p_flags_valid)
3798 p->p_filesz = bed->s->sizeof_ehdr;
3799 p->p_memsz = bed->s->sizeof_ehdr;
3802 BFD_ASSERT (p->p_type == PT_LOAD);
3804 if (p->p_vaddr < (bfd_vma) off)
3806 (*_bfd_error_handler)
3807 (_("%s: Not enough room for program headers, try linking with -N"),
3808 bfd_get_filename (abfd));
3809 bfd_set_error (bfd_error_bad_value);
3814 if (! m->p_paddr_valid)
3817 if (p->p_type == PT_LOAD)
3819 filehdr_vaddr = p->p_vaddr;
3820 filehdr_paddr = p->p_paddr;
3824 if (m->includes_phdrs)
3826 if (! m->p_flags_valid)
3829 if (m->includes_filehdr)
3831 if (p->p_type == PT_LOAD)
3833 phdrs_vaddr = p->p_vaddr + bed->s->sizeof_ehdr;
3834 phdrs_paddr = p->p_paddr + bed->s->sizeof_ehdr;
3839 p->p_offset = bed->s->sizeof_ehdr;
3843 BFD_ASSERT (p->p_type == PT_LOAD);
3844 p->p_vaddr -= off - p->p_offset;
3845 if (! m->p_paddr_valid)
3846 p->p_paddr -= off - p->p_offset;
3849 if (p->p_type == PT_LOAD)
3851 phdrs_vaddr = p->p_vaddr;
3852 phdrs_paddr = p->p_paddr;
3855 phdrs_vaddr = bed->maxpagesize + bed->s->sizeof_ehdr;
3858 p->p_filesz += alloc * bed->s->sizeof_phdr;
3859 p->p_memsz += alloc * bed->s->sizeof_phdr;
3862 if (p->p_type == PT_LOAD
3863 || (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core))
3865 if (! m->includes_filehdr && ! m->includes_phdrs)
3871 adjust = off - (p->p_offset + p->p_filesz);
3872 p->p_filesz += adjust;
3873 p->p_memsz += adjust;
3879 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
3883 bfd_size_type align;
3887 align = 1 << bfd_get_section_alignment (abfd, sec);
3889 /* The section may have artificial alignment forced by a
3890 link script. Notice this case by the gap between the
3891 cumulative phdr lma and the section's lma. */
3892 if (p->p_paddr + p->p_memsz < sec->lma)
3894 bfd_vma adjust = sec->lma - (p->p_paddr + p->p_memsz);
3896 p->p_memsz += adjust;
3897 if (p->p_type == PT_LOAD
3898 || (p->p_type == PT_NOTE
3899 && bfd_get_format (abfd) == bfd_core))
3904 if ((flags & SEC_LOAD) != 0
3905 || (flags & SEC_THREAD_LOCAL) != 0)
3906 p->p_filesz += adjust;
3909 if (p->p_type == PT_LOAD)
3911 bfd_signed_vma adjust;
3913 if ((flags & SEC_LOAD) != 0)
3915 adjust = sec->lma - (p->p_paddr + p->p_memsz);
3919 else if ((flags & SEC_ALLOC) != 0)
3921 /* The section VMA must equal the file position
3922 modulo the page size. FIXME: I'm not sure if
3923 this adjustment is really necessary. We used to
3924 not have the SEC_LOAD case just above, and then
3925 this was necessary, but now I'm not sure. */
3926 if ((abfd->flags & D_PAGED) != 0)
3927 adjust = vma_page_aligned_bias (sec->vma, voff,
3930 adjust = vma_page_aligned_bias (sec->vma, voff,
3940 (* _bfd_error_handler) (_("\
3941 Error: First section in segment (%s) starts at 0x%x whereas the segment starts at 0x%x"),
3942 bfd_section_name (abfd, sec),
3947 p->p_memsz += adjust;
3950 if ((flags & SEC_LOAD) != 0)
3951 p->p_filesz += adjust;
3956 /* We check SEC_HAS_CONTENTS here because if NOLOAD is
3957 used in a linker script we may have a section with
3958 SEC_LOAD clear but which is supposed to have
3960 if ((flags & SEC_LOAD) != 0
3961 || (flags & SEC_HAS_CONTENTS) != 0)
3962 off += sec->_raw_size;
3964 if ((flags & SEC_ALLOC) != 0
3965 && ((flags & SEC_LOAD) != 0
3966 || (flags & SEC_THREAD_LOCAL) == 0))
3967 voff += sec->_raw_size;
3970 if (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core)
3972 /* The actual "note" segment has i == 0.
3973 This is the one that actually contains everything. */
3977 p->p_filesz = sec->_raw_size;
3978 off += sec->_raw_size;
3983 /* Fake sections -- don't need to be written. */
3986 flags = sec->flags = 0;
3993 if ((sec->flags & SEC_LOAD) != 0
3994 || (sec->flags & SEC_THREAD_LOCAL) == 0
3995 || p->p_type == PT_TLS)
3996 p->p_memsz += sec->_raw_size;
3998 if ((flags & SEC_LOAD) != 0)
3999 p->p_filesz += sec->_raw_size;
4001 if (p->p_type == PT_TLS
4002 && sec->_raw_size == 0
4003 && (sec->flags & SEC_HAS_CONTENTS) == 0)
4005 struct bfd_link_order *o;
4006 bfd_vma tbss_size = 0;
4008 for (o = sec->link_order_head; o != NULL; o = o->next)
4009 if (tbss_size < o->offset + o->size)
4010 tbss_size = o->offset + o->size;
4012 p->p_memsz += tbss_size;
4015 if (align > p->p_align
4016 && (p->p_type != PT_LOAD || (abfd->flags & D_PAGED) == 0))
4020 if (! m->p_flags_valid)
4023 if ((flags & SEC_CODE) != 0)
4025 if ((flags & SEC_READONLY) == 0)
4031 /* Now that we have set the section file positions, we can set up
4032 the file positions for the non PT_LOAD segments. */
4033 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
4037 if (p->p_type != PT_LOAD && m->count > 0)
4039 BFD_ASSERT (! m->includes_filehdr && ! m->includes_phdrs);
4040 p->p_offset = m->sections[0]->filepos;
4044 if (m->includes_filehdr)
4046 p->p_vaddr = filehdr_vaddr;
4047 if (! m->p_paddr_valid)
4048 p->p_paddr = filehdr_paddr;
4050 else if (m->includes_phdrs)
4052 p->p_vaddr = phdrs_vaddr;
4053 if (! m->p_paddr_valid)
4054 p->p_paddr = phdrs_paddr;
4059 /* Clear out any program headers we allocated but did not use. */
4060 for (; count < alloc; count++, p++)
4062 memset (p, 0, sizeof *p);
4063 p->p_type = PT_NULL;
4066 elf_tdata (abfd)->phdr = phdrs;
4068 elf_tdata (abfd)->next_file_pos = off;
4070 /* Write out the program headers. */
4071 if (bfd_seek (abfd, (bfd_signed_vma) bed->s->sizeof_ehdr, SEEK_SET) != 0
4072 || bed->s->write_out_phdrs (abfd, phdrs, alloc) != 0)
4078 /* Get the size of the program header.
4080 If this is called by the linker before any of the section VMA's are set, it
4081 can't calculate the correct value for a strange memory layout. This only
4082 happens when SIZEOF_HEADERS is used in a linker script. In this case,
4083 SORTED_HDRS is NULL and we assume the normal scenario of one text and one
4084 data segment (exclusive of .interp and .dynamic).
4086 ??? User written scripts must either not use SIZEOF_HEADERS, or assume there
4087 will be two segments. */
4089 static bfd_size_type
4090 get_program_header_size (bfd *abfd)
4094 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4096 /* We can't return a different result each time we're called. */
4097 if (elf_tdata (abfd)->program_header_size != 0)
4098 return elf_tdata (abfd)->program_header_size;
4100 if (elf_tdata (abfd)->segment_map != NULL)
4102 struct elf_segment_map *m;
4105 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
4107 elf_tdata (abfd)->program_header_size = segs * bed->s->sizeof_phdr;
4108 return elf_tdata (abfd)->program_header_size;
4111 /* Assume we will need exactly two PT_LOAD segments: one for text
4112 and one for data. */
4115 s = bfd_get_section_by_name (abfd, ".interp");
4116 if (s != NULL && (s->flags & SEC_LOAD) != 0)
4118 /* If we have a loadable interpreter section, we need a
4119 PT_INTERP segment. In this case, assume we also need a
4120 PT_PHDR segment, although that may not be true for all
4125 if (bfd_get_section_by_name (abfd, ".dynamic") != NULL)
4127 /* We need a PT_DYNAMIC segment. */
4131 if (elf_tdata (abfd)->eh_frame_hdr)
4133 /* We need a PT_GNU_EH_FRAME segment. */
4137 if (elf_tdata (abfd)->stack_flags)
4139 /* We need a PT_GNU_STACK segment. */
4143 for (s = abfd->sections; s != NULL; s = s->next)
4145 if ((s->flags & SEC_LOAD) != 0
4146 && strncmp (s->name, ".note", 5) == 0)
4148 /* We need a PT_NOTE segment. */
4153 for (s = abfd->sections; s != NULL; s = s->next)
4155 if (s->flags & SEC_THREAD_LOCAL)
4157 /* We need a PT_TLS segment. */
4163 /* Let the backend count up any program headers it might need. */
4164 if (bed->elf_backend_additional_program_headers)
4168 a = (*bed->elf_backend_additional_program_headers) (abfd);
4174 elf_tdata (abfd)->program_header_size = segs * bed->s->sizeof_phdr;
4175 return elf_tdata (abfd)->program_header_size;
4178 /* Work out the file positions of all the sections. This is called by
4179 _bfd_elf_compute_section_file_positions. All the section sizes and
4180 VMAs must be known before this is called.
4182 We do not consider reloc sections at this point, unless they form
4183 part of the loadable image. Reloc sections are assigned file
4184 positions in assign_file_positions_for_relocs, which is called by
4185 write_object_contents and final_link.
4187 We also don't set the positions of the .symtab and .strtab here. */
4190 assign_file_positions_except_relocs (bfd *abfd,
4191 struct bfd_link_info *link_info)
4193 struct elf_obj_tdata * const tdata = elf_tdata (abfd);
4194 Elf_Internal_Ehdr * const i_ehdrp = elf_elfheader (abfd);
4195 Elf_Internal_Shdr ** const i_shdrpp = elf_elfsections (abfd);
4196 unsigned int num_sec = elf_numsections (abfd);
4198 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4200 if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0
4201 && bfd_get_format (abfd) != bfd_core)
4203 Elf_Internal_Shdr **hdrpp;
4206 /* Start after the ELF header. */
4207 off = i_ehdrp->e_ehsize;
4209 /* We are not creating an executable, which means that we are
4210 not creating a program header, and that the actual order of
4211 the sections in the file is unimportant. */
4212 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
4214 Elf_Internal_Shdr *hdr;
4217 if (((hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
4218 && hdr->bfd_section == NULL)
4219 || i == tdata->symtab_section
4220 || i == tdata->symtab_shndx_section
4221 || i == tdata->strtab_section)
4223 hdr->sh_offset = -1;
4226 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4228 if (i == SHN_LORESERVE - 1)
4230 i += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4231 hdrpp += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4238 Elf_Internal_Shdr **hdrpp;
4240 /* Assign file positions for the loaded sections based on the
4241 assignment of sections to segments. */
4242 if (! assign_file_positions_for_segments (abfd, link_info))
4245 /* Assign file positions for the other sections. */
4247 off = elf_tdata (abfd)->next_file_pos;
4248 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
4250 Elf_Internal_Shdr *hdr;
4253 if (hdr->bfd_section != NULL
4254 && hdr->bfd_section->filepos != 0)
4255 hdr->sh_offset = hdr->bfd_section->filepos;
4256 else if ((hdr->sh_flags & SHF_ALLOC) != 0)
4258 ((*_bfd_error_handler)
4259 (_("%s: warning: allocated section `%s' not in segment"),
4260 bfd_get_filename (abfd),
4261 (hdr->bfd_section == NULL
4263 : hdr->bfd_section->name)));
4264 if ((abfd->flags & D_PAGED) != 0)
4265 off += vma_page_aligned_bias (hdr->sh_addr, off,
4268 off += vma_page_aligned_bias (hdr->sh_addr, off,
4270 off = _bfd_elf_assign_file_position_for_section (hdr, off,
4273 else if (((hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
4274 && hdr->bfd_section == NULL)
4275 || hdr == i_shdrpp[tdata->symtab_section]
4276 || hdr == i_shdrpp[tdata->symtab_shndx_section]
4277 || hdr == i_shdrpp[tdata->strtab_section])
4278 hdr->sh_offset = -1;
4280 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4282 if (i == SHN_LORESERVE - 1)
4284 i += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4285 hdrpp += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4290 /* Place the section headers. */
4291 off = align_file_position (off, 1 << bed->s->log_file_align);
4292 i_ehdrp->e_shoff = off;
4293 off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize;
4295 elf_tdata (abfd)->next_file_pos = off;
4301 prep_headers (bfd *abfd)
4303 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
4304 Elf_Internal_Phdr *i_phdrp = 0; /* Program header table, internal form */
4305 Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */
4306 struct elf_strtab_hash *shstrtab;
4307 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4309 i_ehdrp = elf_elfheader (abfd);
4310 i_shdrp = elf_elfsections (abfd);
4312 shstrtab = _bfd_elf_strtab_init ();
4313 if (shstrtab == NULL)
4316 elf_shstrtab (abfd) = shstrtab;
4318 i_ehdrp->e_ident[EI_MAG0] = ELFMAG0;
4319 i_ehdrp->e_ident[EI_MAG1] = ELFMAG1;
4320 i_ehdrp->e_ident[EI_MAG2] = ELFMAG2;
4321 i_ehdrp->e_ident[EI_MAG3] = ELFMAG3;
4323 i_ehdrp->e_ident[EI_CLASS] = bed->s->elfclass;
4324 i_ehdrp->e_ident[EI_DATA] =
4325 bfd_big_endian (abfd) ? ELFDATA2MSB : ELFDATA2LSB;
4326 i_ehdrp->e_ident[EI_VERSION] = bed->s->ev_current;
4328 i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_FREEBSD;
4330 if ((abfd->flags & DYNAMIC) != 0)
4331 i_ehdrp->e_type = ET_DYN;
4332 else if ((abfd->flags & EXEC_P) != 0)
4333 i_ehdrp->e_type = ET_EXEC;
4334 else if (bfd_get_format (abfd) == bfd_core)
4335 i_ehdrp->e_type = ET_CORE;
4337 i_ehdrp->e_type = ET_REL;
4339 switch (bfd_get_arch (abfd))
4341 case bfd_arch_unknown:
4342 i_ehdrp->e_machine = EM_NONE;
4345 /* There used to be a long list of cases here, each one setting
4346 e_machine to the same EM_* macro #defined as ELF_MACHINE_CODE
4347 in the corresponding bfd definition. To avoid duplication,
4348 the switch was removed. Machines that need special handling
4349 can generally do it in elf_backend_final_write_processing(),
4350 unless they need the information earlier than the final write.
4351 Such need can generally be supplied by replacing the tests for
4352 e_machine with the conditions used to determine it. */
4354 i_ehdrp->e_machine = bed->elf_machine_code;
4357 i_ehdrp->e_version = bed->s->ev_current;
4358 i_ehdrp->e_ehsize = bed->s->sizeof_ehdr;
4360 /* No program header, for now. */
4361 i_ehdrp->e_phoff = 0;
4362 i_ehdrp->e_phentsize = 0;
4363 i_ehdrp->e_phnum = 0;
4365 /* Each bfd section is section header entry. */
4366 i_ehdrp->e_entry = bfd_get_start_address (abfd);
4367 i_ehdrp->e_shentsize = bed->s->sizeof_shdr;
4369 /* If we're building an executable, we'll need a program header table. */
4370 if (abfd->flags & EXEC_P)
4372 /* It all happens later. */
4374 i_ehdrp->e_phentsize = sizeof (Elf_External_Phdr);
4376 /* elf_build_phdrs() returns a (NULL-terminated) array of
4377 Elf_Internal_Phdrs. */
4378 i_phdrp = elf_build_phdrs (abfd, i_ehdrp, i_shdrp, &i_ehdrp->e_phnum);
4379 i_ehdrp->e_phoff = outbase;
4380 outbase += i_ehdrp->e_phentsize * i_ehdrp->e_phnum;
4385 i_ehdrp->e_phentsize = 0;
4387 i_ehdrp->e_phoff = 0;
4390 elf_tdata (abfd)->symtab_hdr.sh_name =
4391 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".symtab", FALSE);
4392 elf_tdata (abfd)->strtab_hdr.sh_name =
4393 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".strtab", FALSE);
4394 elf_tdata (abfd)->shstrtab_hdr.sh_name =
4395 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".shstrtab", FALSE);
4396 if (elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
4397 || elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
4398 || elf_tdata (abfd)->shstrtab_hdr.sh_name == (unsigned int) -1)
4404 /* Assign file positions for all the reloc sections which are not part
4405 of the loadable file image. */
4408 _bfd_elf_assign_file_positions_for_relocs (bfd *abfd)
4411 unsigned int i, num_sec;
4412 Elf_Internal_Shdr **shdrpp;
4414 off = elf_tdata (abfd)->next_file_pos;
4416 num_sec = elf_numsections (abfd);
4417 for (i = 1, shdrpp = elf_elfsections (abfd) + 1; i < num_sec; i++, shdrpp++)
4419 Elf_Internal_Shdr *shdrp;
4422 if ((shdrp->sh_type == SHT_REL || shdrp->sh_type == SHT_RELA)
4423 && shdrp->sh_offset == -1)
4424 off = _bfd_elf_assign_file_position_for_section (shdrp, off, TRUE);
4427 elf_tdata (abfd)->next_file_pos = off;
4431 _bfd_elf_write_object_contents (bfd *abfd)
4433 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4434 Elf_Internal_Ehdr *i_ehdrp;
4435 Elf_Internal_Shdr **i_shdrp;
4437 unsigned int count, num_sec;
4439 if (! abfd->output_has_begun
4440 && ! _bfd_elf_compute_section_file_positions (abfd, NULL))
4443 i_shdrp = elf_elfsections (abfd);
4444 i_ehdrp = elf_elfheader (abfd);
4447 bfd_map_over_sections (abfd, bed->s->write_relocs, &failed);
4451 _bfd_elf_assign_file_positions_for_relocs (abfd);
4453 /* After writing the headers, we need to write the sections too... */
4454 num_sec = elf_numsections (abfd);
4455 for (count = 1; count < num_sec; count++)
4457 if (bed->elf_backend_section_processing)
4458 (*bed->elf_backend_section_processing) (abfd, i_shdrp[count]);
4459 if (i_shdrp[count]->contents)
4461 bfd_size_type amt = i_shdrp[count]->sh_size;
4463 if (bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET) != 0
4464 || bfd_bwrite (i_shdrp[count]->contents, amt, abfd) != amt)
4467 if (count == SHN_LORESERVE - 1)
4468 count += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4471 /* Write out the section header names. */
4472 if (bfd_seek (abfd, elf_tdata (abfd)->shstrtab_hdr.sh_offset, SEEK_SET) != 0
4473 || ! _bfd_elf_strtab_emit (abfd, elf_shstrtab (abfd)))
4476 if (bed->elf_backend_final_write_processing)
4477 (*bed->elf_backend_final_write_processing) (abfd,
4478 elf_tdata (abfd)->linker);
4480 return bed->s->write_shdrs_and_ehdr (abfd);
4484 _bfd_elf_write_corefile_contents (bfd *abfd)
4486 /* Hopefully this can be done just like an object file. */
4487 return _bfd_elf_write_object_contents (abfd);
4490 /* Given a section, search the header to find them. */
4493 _bfd_elf_section_from_bfd_section (bfd *abfd, struct bfd_section *asect)
4495 const struct elf_backend_data *bed;
4498 if (elf_section_data (asect) != NULL
4499 && elf_section_data (asect)->this_idx != 0)
4500 return elf_section_data (asect)->this_idx;
4502 if (bfd_is_abs_section (asect))
4504 else if (bfd_is_com_section (asect))
4506 else if (bfd_is_und_section (asect))
4510 Elf_Internal_Shdr **i_shdrp = elf_elfsections (abfd);
4511 int maxindex = elf_numsections (abfd);
4513 for (index = 1; index < maxindex; index++)
4515 Elf_Internal_Shdr *hdr = i_shdrp[index];
4517 if (hdr != NULL && hdr->bfd_section == asect)
4523 bed = get_elf_backend_data (abfd);
4524 if (bed->elf_backend_section_from_bfd_section)
4528 if ((*bed->elf_backend_section_from_bfd_section) (abfd, asect, &retval))
4533 bfd_set_error (bfd_error_nonrepresentable_section);
4538 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
4542 _bfd_elf_symbol_from_bfd_symbol (bfd *abfd, asymbol **asym_ptr_ptr)
4544 asymbol *asym_ptr = *asym_ptr_ptr;
4546 flagword flags = asym_ptr->flags;
4548 /* When gas creates relocations against local labels, it creates its
4549 own symbol for the section, but does put the symbol into the
4550 symbol chain, so udata is 0. When the linker is generating
4551 relocatable output, this section symbol may be for one of the
4552 input sections rather than the output section. */
4553 if (asym_ptr->udata.i == 0
4554 && (flags & BSF_SECTION_SYM)
4555 && asym_ptr->section)
4559 if (asym_ptr->section->output_section != NULL)
4560 indx = asym_ptr->section->output_section->index;
4562 indx = asym_ptr->section->index;
4563 if (indx < elf_num_section_syms (abfd)
4564 && elf_section_syms (abfd)[indx] != NULL)
4565 asym_ptr->udata.i = elf_section_syms (abfd)[indx]->udata.i;
4568 idx = asym_ptr->udata.i;
4572 /* This case can occur when using --strip-symbol on a symbol
4573 which is used in a relocation entry. */
4574 (*_bfd_error_handler)
4575 (_("%s: symbol `%s' required but not present"),
4576 bfd_archive_filename (abfd), bfd_asymbol_name (asym_ptr));
4577 bfd_set_error (bfd_error_no_symbols);
4584 "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n",
4585 (long) asym_ptr, asym_ptr->name, idx, flags,
4586 elf_symbol_flags (flags));
4594 /* Copy private BFD data. This copies any program header information. */
4597 copy_private_bfd_data (bfd *ibfd, bfd *obfd)
4599 Elf_Internal_Ehdr *iehdr;
4600 struct elf_segment_map *map;
4601 struct elf_segment_map *map_first;
4602 struct elf_segment_map **pointer_to_map;
4603 Elf_Internal_Phdr *segment;
4606 unsigned int num_segments;
4607 bfd_boolean phdr_included = FALSE;
4608 bfd_vma maxpagesize;
4609 struct elf_segment_map *phdr_adjust_seg = NULL;
4610 unsigned int phdr_adjust_num = 0;
4611 const struct elf_backend_data *bed;
4613 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
4614 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
4617 if (elf_tdata (ibfd)->phdr == NULL)
4620 bed = get_elf_backend_data (ibfd);
4621 iehdr = elf_elfheader (ibfd);
4624 pointer_to_map = &map_first;
4626 num_segments = elf_elfheader (ibfd)->e_phnum;
4627 maxpagesize = get_elf_backend_data (obfd)->maxpagesize;
4629 /* Returns the end address of the segment + 1. */
4630 #define SEGMENT_END(segment, start) \
4631 (start + (segment->p_memsz > segment->p_filesz \
4632 ? segment->p_memsz : segment->p_filesz))
4634 #define SECTION_SIZE(section, segment) \
4635 (((section->flags & (SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) \
4636 != SEC_THREAD_LOCAL || segment->p_type == PT_TLS) \
4637 ? section->_raw_size : 0)
4639 /* Returns TRUE if the given section is contained within
4640 the given segment. VMA addresses are compared. */
4641 #define IS_CONTAINED_BY_VMA(section, segment) \
4642 (section->vma >= segment->p_vaddr \
4643 && (section->vma + SECTION_SIZE (section, segment) \
4644 <= (SEGMENT_END (segment, segment->p_vaddr))))
4646 /* Returns TRUE if the given section is contained within
4647 the given segment. LMA addresses are compared. */
4648 #define IS_CONTAINED_BY_LMA(section, segment, base) \
4649 (section->lma >= base \
4650 && (section->lma + SECTION_SIZE (section, segment) \
4651 <= SEGMENT_END (segment, base)))
4653 /* Special case: corefile "NOTE" section containing regs, prpsinfo etc. */
4654 #define IS_COREFILE_NOTE(p, s) \
4655 (p->p_type == PT_NOTE \
4656 && bfd_get_format (ibfd) == bfd_core \
4657 && s->vma == 0 && s->lma == 0 \
4658 && (bfd_vma) s->filepos >= p->p_offset \
4659 && ((bfd_vma) s->filepos + s->_raw_size \
4660 <= p->p_offset + p->p_filesz))
4662 /* The complicated case when p_vaddr is 0 is to handle the Solaris
4663 linker, which generates a PT_INTERP section with p_vaddr and
4664 p_memsz set to 0. */
4665 #define IS_SOLARIS_PT_INTERP(p, s) \
4667 && p->p_paddr == 0 \
4668 && p->p_memsz == 0 \
4669 && p->p_filesz > 0 \
4670 && (s->flags & SEC_HAS_CONTENTS) != 0 \
4671 && s->_raw_size > 0 \
4672 && (bfd_vma) s->filepos >= p->p_offset \
4673 && ((bfd_vma) s->filepos + s->_raw_size \
4674 <= p->p_offset + p->p_filesz))
4676 /* Decide if the given section should be included in the given segment.
4677 A section will be included if:
4678 1. It is within the address space of the segment -- we use the LMA
4679 if that is set for the segment and the VMA otherwise,
4680 2. It is an allocated segment,
4681 3. There is an output section associated with it,
4682 4. The section has not already been allocated to a previous segment.
4683 5. PT_GNU_STACK segments do not include any sections.
4684 6. PT_TLS segment includes only SHF_TLS sections.
4685 7. SHF_TLS sections are only in PT_TLS or PT_LOAD segments. */
4686 #define INCLUDE_SECTION_IN_SEGMENT(section, segment, bed) \
4687 ((((segment->p_paddr \
4688 ? IS_CONTAINED_BY_LMA (section, segment, segment->p_paddr) \
4689 : IS_CONTAINED_BY_VMA (section, segment)) \
4690 && (section->flags & SEC_ALLOC) != 0) \
4691 || IS_COREFILE_NOTE (segment, section)) \
4692 && section->output_section != NULL \
4693 && segment->p_type != PT_GNU_STACK \
4694 && (segment->p_type != PT_TLS \
4695 || (section->flags & SEC_THREAD_LOCAL)) \
4696 && (segment->p_type == PT_LOAD \
4697 || segment->p_type == PT_TLS \
4698 || (section->flags & SEC_THREAD_LOCAL) == 0) \
4699 && ! section->segment_mark)
4701 /* Returns TRUE iff seg1 starts after the end of seg2. */
4702 #define SEGMENT_AFTER_SEGMENT(seg1, seg2, field) \
4703 (seg1->field >= SEGMENT_END (seg2, seg2->field))
4705 /* Returns TRUE iff seg1 and seg2 overlap. Segments overlap iff both
4706 their VMA address ranges and their LMA address ranges overlap.
4707 It is possible to have overlapping VMA ranges without overlapping LMA
4708 ranges. RedBoot images for example can have both .data and .bss mapped
4709 to the same VMA range, but with the .data section mapped to a different
4711 #define SEGMENT_OVERLAPS(seg1, seg2) \
4712 ( !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_vaddr) \
4713 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_vaddr)) \
4714 && !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_paddr) \
4715 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_paddr)))
4717 /* Initialise the segment mark field. */
4718 for (section = ibfd->sections; section != NULL; section = section->next)
4719 section->segment_mark = FALSE;
4721 /* Scan through the segments specified in the program header
4722 of the input BFD. For this first scan we look for overlaps
4723 in the loadable segments. These can be created by weird
4724 parameters to objcopy. Also, fix some solaris weirdness. */
4725 for (i = 0, segment = elf_tdata (ibfd)->phdr;
4730 Elf_Internal_Phdr *segment2;
4732 if (segment->p_type == PT_INTERP)
4733 for (section = ibfd->sections; section; section = section->next)
4734 if (IS_SOLARIS_PT_INTERP (segment, section))
4736 /* Mininal change so that the normal section to segment
4737 assignment code will work. */
4738 segment->p_vaddr = section->vma;
4742 if (segment->p_type != PT_LOAD)
4745 /* Determine if this segment overlaps any previous segments. */
4746 for (j = 0, segment2 = elf_tdata (ibfd)->phdr; j < i; j++, segment2 ++)
4748 bfd_signed_vma extra_length;
4750 if (segment2->p_type != PT_LOAD
4751 || ! SEGMENT_OVERLAPS (segment, segment2))
4754 /* Merge the two segments together. */
4755 if (segment2->p_vaddr < segment->p_vaddr)
4757 /* Extend SEGMENT2 to include SEGMENT and then delete
4760 SEGMENT_END (segment, segment->p_vaddr)
4761 - SEGMENT_END (segment2, segment2->p_vaddr);
4763 if (extra_length > 0)
4765 segment2->p_memsz += extra_length;
4766 segment2->p_filesz += extra_length;
4769 segment->p_type = PT_NULL;
4771 /* Since we have deleted P we must restart the outer loop. */
4773 segment = elf_tdata (ibfd)->phdr;
4778 /* Extend SEGMENT to include SEGMENT2 and then delete
4781 SEGMENT_END (segment2, segment2->p_vaddr)
4782 - SEGMENT_END (segment, segment->p_vaddr);
4784 if (extra_length > 0)
4786 segment->p_memsz += extra_length;
4787 segment->p_filesz += extra_length;
4790 segment2->p_type = PT_NULL;
4795 /* The second scan attempts to assign sections to segments. */
4796 for (i = 0, segment = elf_tdata (ibfd)->phdr;
4800 unsigned int section_count;
4801 asection ** sections;
4802 asection * output_section;
4804 bfd_vma matching_lma;
4805 bfd_vma suggested_lma;
4809 if (segment->p_type == PT_NULL)
4812 /* Compute how many sections might be placed into this segment. */
4813 for (section = ibfd->sections, section_count = 0;
4815 section = section->next)
4816 if (INCLUDE_SECTION_IN_SEGMENT (section, segment, bed))
4819 /* Allocate a segment map big enough to contain
4820 all of the sections we have selected. */
4821 amt = sizeof (struct elf_segment_map);
4822 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
4823 map = bfd_alloc (obfd, amt);
4827 /* Initialise the fields of the segment map. Default to
4828 using the physical address of the segment in the input BFD. */
4830 map->p_type = segment->p_type;
4831 map->p_flags = segment->p_flags;
4832 map->p_flags_valid = 1;
4833 map->p_paddr = segment->p_paddr;
4834 map->p_paddr_valid = 1;
4836 /* Determine if this segment contains the ELF file header
4837 and if it contains the program headers themselves. */
4838 map->includes_filehdr = (segment->p_offset == 0
4839 && segment->p_filesz >= iehdr->e_ehsize);
4841 map->includes_phdrs = 0;
4843 if (! phdr_included || segment->p_type != PT_LOAD)
4845 map->includes_phdrs =
4846 (segment->p_offset <= (bfd_vma) iehdr->e_phoff
4847 && (segment->p_offset + segment->p_filesz
4848 >= ((bfd_vma) iehdr->e_phoff
4849 + iehdr->e_phnum * iehdr->e_phentsize)));
4851 if (segment->p_type == PT_LOAD && map->includes_phdrs)
4852 phdr_included = TRUE;
4855 if (section_count == 0)
4857 /* Special segments, such as the PT_PHDR segment, may contain
4858 no sections, but ordinary, loadable segments should contain
4859 something. They are allowed by the ELF spec however, so only
4860 a warning is produced. */
4861 if (segment->p_type == PT_LOAD)
4862 (*_bfd_error_handler)
4863 (_("%s: warning: Empty loadable segment detected, is this intentional ?\n"),
4864 bfd_archive_filename (ibfd));
4867 *pointer_to_map = map;
4868 pointer_to_map = &map->next;
4873 /* Now scan the sections in the input BFD again and attempt
4874 to add their corresponding output sections to the segment map.
4875 The problem here is how to handle an output section which has
4876 been moved (ie had its LMA changed). There are four possibilities:
4878 1. None of the sections have been moved.
4879 In this case we can continue to use the segment LMA from the
4882 2. All of the sections have been moved by the same amount.
4883 In this case we can change the segment's LMA to match the LMA
4884 of the first section.
4886 3. Some of the sections have been moved, others have not.
4887 In this case those sections which have not been moved can be
4888 placed in the current segment which will have to have its size,
4889 and possibly its LMA changed, and a new segment or segments will
4890 have to be created to contain the other sections.
4892 4. The sections have been moved, but not by the same amount.
4893 In this case we can change the segment's LMA to match the LMA
4894 of the first section and we will have to create a new segment
4895 or segments to contain the other sections.
4897 In order to save time, we allocate an array to hold the section
4898 pointers that we are interested in. As these sections get assigned
4899 to a segment, they are removed from this array. */
4901 /* Gcc 2.96 miscompiles this code on mips. Don't do casting here
4902 to work around this long long bug. */
4903 amt = section_count * sizeof (asection *);
4904 sections = bfd_malloc (amt);
4905 if (sections == NULL)
4908 /* Step One: Scan for segment vs section LMA conflicts.
4909 Also add the sections to the section array allocated above.
4910 Also add the sections to the current segment. In the common
4911 case, where the sections have not been moved, this means that
4912 we have completely filled the segment, and there is nothing
4918 for (j = 0, section = ibfd->sections;
4920 section = section->next)
4922 if (INCLUDE_SECTION_IN_SEGMENT (section, segment, bed))
4924 output_section = section->output_section;
4926 sections[j ++] = section;
4928 /* The Solaris native linker always sets p_paddr to 0.
4929 We try to catch that case here, and set it to the
4930 correct value. Note - some backends require that
4931 p_paddr be left as zero. */
4932 if (segment->p_paddr == 0
4933 && segment->p_vaddr != 0
4934 && (! bed->want_p_paddr_set_to_zero)
4936 && output_section->lma != 0
4937 && (output_section->vma == (segment->p_vaddr
4938 + (map->includes_filehdr
4941 + (map->includes_phdrs
4943 * iehdr->e_phentsize)
4945 map->p_paddr = segment->p_vaddr;
4947 /* Match up the physical address of the segment with the
4948 LMA address of the output section. */
4949 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
4950 || IS_COREFILE_NOTE (segment, section)
4951 || (bed->want_p_paddr_set_to_zero &&
4952 IS_CONTAINED_BY_VMA (output_section, segment))
4955 if (matching_lma == 0)
4956 matching_lma = output_section->lma;
4958 /* We assume that if the section fits within the segment
4959 then it does not overlap any other section within that
4961 map->sections[isec ++] = output_section;
4963 else if (suggested_lma == 0)
4964 suggested_lma = output_section->lma;
4968 BFD_ASSERT (j == section_count);
4970 /* Step Two: Adjust the physical address of the current segment,
4972 if (isec == section_count)
4974 /* All of the sections fitted within the segment as currently
4975 specified. This is the default case. Add the segment to
4976 the list of built segments and carry on to process the next
4977 program header in the input BFD. */
4978 map->count = section_count;
4979 *pointer_to_map = map;
4980 pointer_to_map = &map->next;
4987 if (matching_lma != 0)
4989 /* At least one section fits inside the current segment.
4990 Keep it, but modify its physical address to match the
4991 LMA of the first section that fitted. */
4992 map->p_paddr = matching_lma;
4996 /* None of the sections fitted inside the current segment.
4997 Change the current segment's physical address to match
4998 the LMA of the first section. */
4999 map->p_paddr = suggested_lma;
5002 /* Offset the segment physical address from the lma
5003 to allow for space taken up by elf headers. */
5004 if (map->includes_filehdr)
5005 map->p_paddr -= iehdr->e_ehsize;
5007 if (map->includes_phdrs)
5009 map->p_paddr -= iehdr->e_phnum * iehdr->e_phentsize;
5011 /* iehdr->e_phnum is just an estimate of the number
5012 of program headers that we will need. Make a note
5013 here of the number we used and the segment we chose
5014 to hold these headers, so that we can adjust the
5015 offset when we know the correct value. */
5016 phdr_adjust_num = iehdr->e_phnum;
5017 phdr_adjust_seg = map;
5021 /* Step Three: Loop over the sections again, this time assigning
5022 those that fit to the current segment and removing them from the
5023 sections array; but making sure not to leave large gaps. Once all
5024 possible sections have been assigned to the current segment it is
5025 added to the list of built segments and if sections still remain
5026 to be assigned, a new segment is constructed before repeating
5034 /* Fill the current segment with sections that fit. */
5035 for (j = 0; j < section_count; j++)
5037 section = sections[j];
5039 if (section == NULL)
5042 output_section = section->output_section;
5044 BFD_ASSERT (output_section != NULL);
5046 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
5047 || IS_COREFILE_NOTE (segment, section))
5049 if (map->count == 0)
5051 /* If the first section in a segment does not start at
5052 the beginning of the segment, then something is
5054 if (output_section->lma !=
5056 + (map->includes_filehdr ? iehdr->e_ehsize : 0)
5057 + (map->includes_phdrs
5058 ? iehdr->e_phnum * iehdr->e_phentsize
5064 asection * prev_sec;
5066 prev_sec = map->sections[map->count - 1];
5068 /* If the gap between the end of the previous section
5069 and the start of this section is more than
5070 maxpagesize then we need to start a new segment. */
5071 if ((BFD_ALIGN (prev_sec->lma + prev_sec->_raw_size,
5073 < BFD_ALIGN (output_section->lma, maxpagesize))
5074 || ((prev_sec->lma + prev_sec->_raw_size)
5075 > output_section->lma))
5077 if (suggested_lma == 0)
5078 suggested_lma = output_section->lma;
5084 map->sections[map->count++] = output_section;
5087 section->segment_mark = TRUE;
5089 else if (suggested_lma == 0)
5090 suggested_lma = output_section->lma;
5093 BFD_ASSERT (map->count > 0);
5095 /* Add the current segment to the list of built segments. */
5096 *pointer_to_map = map;
5097 pointer_to_map = &map->next;
5099 if (isec < section_count)
5101 /* We still have not allocated all of the sections to
5102 segments. Create a new segment here, initialise it
5103 and carry on looping. */
5104 amt = sizeof (struct elf_segment_map);
5105 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
5106 map = bfd_alloc (obfd, amt);
5113 /* Initialise the fields of the segment map. Set the physical
5114 physical address to the LMA of the first section that has
5115 not yet been assigned. */
5117 map->p_type = segment->p_type;
5118 map->p_flags = segment->p_flags;
5119 map->p_flags_valid = 1;
5120 map->p_paddr = suggested_lma;
5121 map->p_paddr_valid = 1;
5122 map->includes_filehdr = 0;
5123 map->includes_phdrs = 0;
5126 while (isec < section_count);
5131 /* The Solaris linker creates program headers in which all the
5132 p_paddr fields are zero. When we try to objcopy or strip such a
5133 file, we get confused. Check for this case, and if we find it
5134 reset the p_paddr_valid fields. */
5135 for (map = map_first; map != NULL; map = map->next)
5136 if (map->p_paddr != 0)
5139 for (map = map_first; map != NULL; map = map->next)
5140 map->p_paddr_valid = 0;
5142 elf_tdata (obfd)->segment_map = map_first;
5144 /* If we had to estimate the number of program headers that were
5145 going to be needed, then check our estimate now and adjust
5146 the offset if necessary. */
5147 if (phdr_adjust_seg != NULL)
5151 for (count = 0, map = map_first; map != NULL; map = map->next)
5154 if (count > phdr_adjust_num)
5155 phdr_adjust_seg->p_paddr
5156 -= (count - phdr_adjust_num) * iehdr->e_phentsize;
5160 /* Final Step: Sort the segments into ascending order of physical
5162 if (map_first != NULL)
5164 struct elf_segment_map *prev;
5167 for (map = map_first->next; map != NULL; prev = map, map = map->next)
5169 /* Yes I know - its a bubble sort.... */
5170 if (map->next != NULL && (map->next->p_paddr < map->p_paddr))
5172 /* Swap map and map->next. */
5173 prev->next = map->next;
5174 map->next = map->next->next;
5175 prev->next->next = map;
5186 #undef IS_CONTAINED_BY_VMA
5187 #undef IS_CONTAINED_BY_LMA
5188 #undef IS_COREFILE_NOTE
5189 #undef IS_SOLARIS_PT_INTERP
5190 #undef INCLUDE_SECTION_IN_SEGMENT
5191 #undef SEGMENT_AFTER_SEGMENT
5192 #undef SEGMENT_OVERLAPS
5196 /* Copy private section information. This copies over the entsize
5197 field, and sometimes the info field. */
5200 _bfd_elf_copy_private_section_data (bfd *ibfd,
5205 Elf_Internal_Shdr *ihdr, *ohdr;
5207 if (ibfd->xvec->flavour != bfd_target_elf_flavour
5208 || obfd->xvec->flavour != bfd_target_elf_flavour)
5211 if (elf_tdata (obfd)->segment_map == NULL && elf_tdata (ibfd)->phdr != NULL)
5215 /* Only set up the segments if there are no more SEC_ALLOC
5216 sections. FIXME: This won't do the right thing if objcopy is
5217 used to remove the last SEC_ALLOC section, since objcopy
5218 won't call this routine in that case. */
5219 for (s = isec->next; s != NULL; s = s->next)
5220 if ((s->flags & SEC_ALLOC) != 0)
5224 if (! copy_private_bfd_data (ibfd, obfd))
5229 ihdr = &elf_section_data (isec)->this_hdr;
5230 ohdr = &elf_section_data (osec)->this_hdr;
5232 ohdr->sh_entsize = ihdr->sh_entsize;
5234 if (ihdr->sh_type == SHT_SYMTAB
5235 || ihdr->sh_type == SHT_DYNSYM
5236 || ihdr->sh_type == SHT_GNU_verneed
5237 || ihdr->sh_type == SHT_GNU_verdef)
5238 ohdr->sh_info = ihdr->sh_info;
5240 /* Set things up for objcopy. The output SHT_GROUP section will
5241 have its elf_next_in_group pointing back to the input group
5243 elf_next_in_group (osec) = elf_next_in_group (isec);
5244 elf_group_name (osec) = elf_group_name (isec);
5246 osec->use_rela_p = isec->use_rela_p;
5251 /* Copy private symbol information. If this symbol is in a section
5252 which we did not map into a BFD section, try to map the section
5253 index correctly. We use special macro definitions for the mapped
5254 section indices; these definitions are interpreted by the
5255 swap_out_syms function. */
5257 #define MAP_ONESYMTAB (SHN_HIOS + 1)
5258 #define MAP_DYNSYMTAB (SHN_HIOS + 2)
5259 #define MAP_STRTAB (SHN_HIOS + 3)
5260 #define MAP_SHSTRTAB (SHN_HIOS + 4)
5261 #define MAP_SYM_SHNDX (SHN_HIOS + 5)
5264 _bfd_elf_copy_private_symbol_data (bfd *ibfd,
5269 elf_symbol_type *isym, *osym;
5271 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
5272 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
5275 isym = elf_symbol_from (ibfd, isymarg);
5276 osym = elf_symbol_from (obfd, osymarg);
5280 && bfd_is_abs_section (isym->symbol.section))
5284 shndx = isym->internal_elf_sym.st_shndx;
5285 if (shndx == elf_onesymtab (ibfd))
5286 shndx = MAP_ONESYMTAB;
5287 else if (shndx == elf_dynsymtab (ibfd))
5288 shndx = MAP_DYNSYMTAB;
5289 else if (shndx == elf_tdata (ibfd)->strtab_section)
5291 else if (shndx == elf_tdata (ibfd)->shstrtab_section)
5292 shndx = MAP_SHSTRTAB;
5293 else if (shndx == elf_tdata (ibfd)->symtab_shndx_section)
5294 shndx = MAP_SYM_SHNDX;
5295 osym->internal_elf_sym.st_shndx = shndx;
5301 /* Swap out the symbols. */
5304 swap_out_syms (bfd *abfd,
5305 struct bfd_strtab_hash **sttp,
5308 const struct elf_backend_data *bed;
5311 struct bfd_strtab_hash *stt;
5312 Elf_Internal_Shdr *symtab_hdr;
5313 Elf_Internal_Shdr *symtab_shndx_hdr;
5314 Elf_Internal_Shdr *symstrtab_hdr;
5315 char *outbound_syms;
5316 char *outbound_shndx;
5319 bfd_boolean name_local_sections;
5321 if (!elf_map_symbols (abfd))
5324 /* Dump out the symtabs. */
5325 stt = _bfd_elf_stringtab_init ();
5329 bed = get_elf_backend_data (abfd);
5330 symcount = bfd_get_symcount (abfd);
5331 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5332 symtab_hdr->sh_type = SHT_SYMTAB;
5333 symtab_hdr->sh_entsize = bed->s->sizeof_sym;
5334 symtab_hdr->sh_size = symtab_hdr->sh_entsize * (symcount + 1);
5335 symtab_hdr->sh_info = elf_num_locals (abfd) + 1;
5336 symtab_hdr->sh_addralign = 1 << bed->s->log_file_align;
5338 symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr;
5339 symstrtab_hdr->sh_type = SHT_STRTAB;
5341 amt = (bfd_size_type) (1 + symcount) * bed->s->sizeof_sym;
5342 outbound_syms = bfd_alloc (abfd, amt);
5343 if (outbound_syms == NULL)
5345 _bfd_stringtab_free (stt);
5348 symtab_hdr->contents = outbound_syms;
5350 outbound_shndx = NULL;
5351 symtab_shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
5352 if (symtab_shndx_hdr->sh_name != 0)
5354 amt = (bfd_size_type) (1 + symcount) * sizeof (Elf_External_Sym_Shndx);
5355 outbound_shndx = bfd_zalloc (abfd, amt);
5356 if (outbound_shndx == NULL)
5358 _bfd_stringtab_free (stt);
5362 symtab_shndx_hdr->contents = outbound_shndx;
5363 symtab_shndx_hdr->sh_type = SHT_SYMTAB_SHNDX;
5364 symtab_shndx_hdr->sh_size = amt;
5365 symtab_shndx_hdr->sh_addralign = sizeof (Elf_External_Sym_Shndx);
5366 symtab_shndx_hdr->sh_entsize = sizeof (Elf_External_Sym_Shndx);
5369 /* Now generate the data (for "contents"). */
5371 /* Fill in zeroth symbol and swap it out. */
5372 Elf_Internal_Sym sym;
5378 sym.st_shndx = SHN_UNDEF;
5379 bed->s->swap_symbol_out (abfd, &sym, outbound_syms, outbound_shndx);
5380 outbound_syms += bed->s->sizeof_sym;
5381 if (outbound_shndx != NULL)
5382 outbound_shndx += sizeof (Elf_External_Sym_Shndx);
5386 = (bed->elf_backend_name_local_section_symbols
5387 && bed->elf_backend_name_local_section_symbols (abfd));
5389 syms = bfd_get_outsymbols (abfd);
5390 for (idx = 0; idx < symcount; idx++)
5392 Elf_Internal_Sym sym;
5393 bfd_vma value = syms[idx]->value;
5394 elf_symbol_type *type_ptr;
5395 flagword flags = syms[idx]->flags;
5398 if (!name_local_sections
5399 && (flags & (BSF_SECTION_SYM | BSF_GLOBAL)) == BSF_SECTION_SYM)
5401 /* Local section symbols have no name. */
5406 sym.st_name = (unsigned long) _bfd_stringtab_add (stt,
5409 if (sym.st_name == (unsigned long) -1)
5411 _bfd_stringtab_free (stt);
5416 type_ptr = elf_symbol_from (abfd, syms[idx]);
5418 if ((flags & BSF_SECTION_SYM) == 0
5419 && bfd_is_com_section (syms[idx]->section))
5421 /* ELF common symbols put the alignment into the `value' field,
5422 and the size into the `size' field. This is backwards from
5423 how BFD handles it, so reverse it here. */
5424 sym.st_size = value;
5425 if (type_ptr == NULL
5426 || type_ptr->internal_elf_sym.st_value == 0)
5427 sym.st_value = value >= 16 ? 16 : (1 << bfd_log2 (value));
5429 sym.st_value = type_ptr->internal_elf_sym.st_value;
5430 sym.st_shndx = _bfd_elf_section_from_bfd_section
5431 (abfd, syms[idx]->section);
5435 asection *sec = syms[idx]->section;
5438 if (sec->output_section)
5440 value += sec->output_offset;
5441 sec = sec->output_section;
5444 /* Don't add in the section vma for relocatable output. */
5445 if (! relocatable_p)
5447 sym.st_value = value;
5448 sym.st_size = type_ptr ? type_ptr->internal_elf_sym.st_size : 0;
5450 if (bfd_is_abs_section (sec)
5452 && type_ptr->internal_elf_sym.st_shndx != 0)
5454 /* This symbol is in a real ELF section which we did
5455 not create as a BFD section. Undo the mapping done
5456 by copy_private_symbol_data. */
5457 shndx = type_ptr->internal_elf_sym.st_shndx;
5461 shndx = elf_onesymtab (abfd);
5464 shndx = elf_dynsymtab (abfd);
5467 shndx = elf_tdata (abfd)->strtab_section;
5470 shndx = elf_tdata (abfd)->shstrtab_section;
5473 shndx = elf_tdata (abfd)->symtab_shndx_section;
5481 shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
5487 /* Writing this would be a hell of a lot easier if
5488 we had some decent documentation on bfd, and
5489 knew what to expect of the library, and what to
5490 demand of applications. For example, it
5491 appears that `objcopy' might not set the
5492 section of a symbol to be a section that is
5493 actually in the output file. */
5494 sec2 = bfd_get_section_by_name (abfd, sec->name);
5497 _bfd_error_handler (_("\
5498 Unable to find equivalent output section for symbol '%s' from section '%s'"),
5499 syms[idx]->name ? syms[idx]->name : "<Local sym>",
5501 bfd_set_error (bfd_error_invalid_operation);
5502 _bfd_stringtab_free (stt);
5506 shndx = _bfd_elf_section_from_bfd_section (abfd, sec2);
5507 BFD_ASSERT (shndx != -1);
5511 sym.st_shndx = shndx;
5514 if ((flags & BSF_THREAD_LOCAL) != 0)
5516 else if ((flags & BSF_FUNCTION) != 0)
5518 else if ((flags & BSF_OBJECT) != 0)
5523 if (syms[idx]->section->flags & SEC_THREAD_LOCAL)
5526 /* Processor-specific types. */
5527 if (type_ptr != NULL
5528 && bed->elf_backend_get_symbol_type)
5529 type = ((*bed->elf_backend_get_symbol_type)
5530 (&type_ptr->internal_elf_sym, type));
5532 if (flags & BSF_SECTION_SYM)
5534 if (flags & BSF_GLOBAL)
5535 sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION);
5537 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
5539 else if (bfd_is_com_section (syms[idx]->section))
5540 sym.st_info = ELF_ST_INFO (STB_GLOBAL, type);
5541 else if (bfd_is_und_section (syms[idx]->section))
5542 sym.st_info = ELF_ST_INFO (((flags & BSF_WEAK)
5546 else if (flags & BSF_FILE)
5547 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE);
5550 int bind = STB_LOCAL;
5552 if (flags & BSF_LOCAL)
5554 else if (flags & BSF_WEAK)
5556 else if (flags & BSF_GLOBAL)
5559 sym.st_info = ELF_ST_INFO (bind, type);
5562 if (type_ptr != NULL)
5563 sym.st_other = type_ptr->internal_elf_sym.st_other;
5567 bed->s->swap_symbol_out (abfd, &sym, outbound_syms, outbound_shndx);
5568 outbound_syms += bed->s->sizeof_sym;
5569 if (outbound_shndx != NULL)
5570 outbound_shndx += sizeof (Elf_External_Sym_Shndx);
5574 symstrtab_hdr->sh_size = _bfd_stringtab_size (stt);
5575 symstrtab_hdr->sh_type = SHT_STRTAB;
5577 symstrtab_hdr->sh_flags = 0;
5578 symstrtab_hdr->sh_addr = 0;
5579 symstrtab_hdr->sh_entsize = 0;
5580 symstrtab_hdr->sh_link = 0;
5581 symstrtab_hdr->sh_info = 0;
5582 symstrtab_hdr->sh_addralign = 1;
5587 /* Return the number of bytes required to hold the symtab vector.
5589 Note that we base it on the count plus 1, since we will null terminate
5590 the vector allocated based on this size. However, the ELF symbol table
5591 always has a dummy entry as symbol #0, so it ends up even. */
5594 _bfd_elf_get_symtab_upper_bound (bfd *abfd)
5598 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->symtab_hdr;
5600 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
5601 symtab_size = (symcount + 1) * (sizeof (asymbol *));
5603 symtab_size -= sizeof (asymbol *);
5609 _bfd_elf_get_dynamic_symtab_upper_bound (bfd *abfd)
5613 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->dynsymtab_hdr;
5615 if (elf_dynsymtab (abfd) == 0)
5617 bfd_set_error (bfd_error_invalid_operation);
5621 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
5622 symtab_size = (symcount + 1) * (sizeof (asymbol *));
5624 symtab_size -= sizeof (asymbol *);
5630 _bfd_elf_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED,
5633 return (asect->reloc_count + 1) * sizeof (arelent *);
5636 /* Canonicalize the relocs. */
5639 _bfd_elf_canonicalize_reloc (bfd *abfd,
5646 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5648 if (! bed->s->slurp_reloc_table (abfd, section, symbols, FALSE))
5651 tblptr = section->relocation;
5652 for (i = 0; i < section->reloc_count; i++)
5653 *relptr++ = tblptr++;
5657 return section->reloc_count;
5661 _bfd_elf_canonicalize_symtab (bfd *abfd, asymbol **allocation)
5663 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5664 long symcount = bed->s->slurp_symbol_table (abfd, allocation, FALSE);
5667 bfd_get_symcount (abfd) = symcount;
5672 _bfd_elf_canonicalize_dynamic_symtab (bfd *abfd,
5673 asymbol **allocation)
5675 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5676 long symcount = bed->s->slurp_symbol_table (abfd, allocation, TRUE);
5679 bfd_get_dynamic_symcount (abfd) = symcount;
5683 /* Return the size required for the dynamic reloc entries. Any
5684 section that was actually installed in the BFD, and has type
5685 SHT_REL or SHT_RELA, and uses the dynamic symbol table, is
5686 considered to be a dynamic reloc section. */
5689 _bfd_elf_get_dynamic_reloc_upper_bound (bfd *abfd)
5694 if (elf_dynsymtab (abfd) == 0)
5696 bfd_set_error (bfd_error_invalid_operation);
5700 ret = sizeof (arelent *);
5701 for (s = abfd->sections; s != NULL; s = s->next)
5702 if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
5703 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
5704 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
5705 ret += ((s->_raw_size / elf_section_data (s)->this_hdr.sh_entsize)
5706 * sizeof (arelent *));
5711 /* Canonicalize the dynamic relocation entries. Note that we return
5712 the dynamic relocations as a single block, although they are
5713 actually associated with particular sections; the interface, which
5714 was designed for SunOS style shared libraries, expects that there
5715 is only one set of dynamic relocs. Any section that was actually
5716 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses
5717 the dynamic symbol table, is considered to be a dynamic reloc
5721 _bfd_elf_canonicalize_dynamic_reloc (bfd *abfd,
5725 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
5729 if (elf_dynsymtab (abfd) == 0)
5731 bfd_set_error (bfd_error_invalid_operation);
5735 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
5737 for (s = abfd->sections; s != NULL; s = s->next)
5739 if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
5740 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
5741 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
5746 if (! (*slurp_relocs) (abfd, s, syms, TRUE))
5748 count = s->_raw_size / elf_section_data (s)->this_hdr.sh_entsize;
5750 for (i = 0; i < count; i++)
5761 /* Read in the version information. */
5764 _bfd_elf_slurp_version_tables (bfd *abfd)
5766 bfd_byte *contents = NULL;
5769 if (elf_dynverdef (abfd) != 0)
5771 Elf_Internal_Shdr *hdr;
5772 Elf_External_Verdef *everdef;
5773 Elf_Internal_Verdef *iverdef;
5774 Elf_Internal_Verdef *iverdefarr;
5775 Elf_Internal_Verdef iverdefmem;
5777 unsigned int maxidx;
5779 hdr = &elf_tdata (abfd)->dynverdef_hdr;
5781 contents = bfd_malloc (hdr->sh_size);
5782 if (contents == NULL)
5784 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
5785 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size)
5788 /* We know the number of entries in the section but not the maximum
5789 index. Therefore we have to run through all entries and find
5791 everdef = (Elf_External_Verdef *) contents;
5793 for (i = 0; i < hdr->sh_info; ++i)
5795 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
5797 if ((iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION)) > maxidx)
5798 maxidx = iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION);
5800 everdef = ((Elf_External_Verdef *)
5801 ((bfd_byte *) everdef + iverdefmem.vd_next));
5804 amt = (bfd_size_type) maxidx * sizeof (Elf_Internal_Verdef);
5805 elf_tdata (abfd)->verdef = bfd_zalloc (abfd, amt);
5806 if (elf_tdata (abfd)->verdef == NULL)
5809 elf_tdata (abfd)->cverdefs = maxidx;
5811 everdef = (Elf_External_Verdef *) contents;
5812 iverdefarr = elf_tdata (abfd)->verdef;
5813 for (i = 0; i < hdr->sh_info; i++)
5815 Elf_External_Verdaux *everdaux;
5816 Elf_Internal_Verdaux *iverdaux;
5819 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
5821 iverdef = &iverdefarr[(iverdefmem.vd_ndx & VERSYM_VERSION) - 1];
5822 memcpy (iverdef, &iverdefmem, sizeof (Elf_Internal_Verdef));
5824 iverdef->vd_bfd = abfd;
5826 amt = (bfd_size_type) iverdef->vd_cnt * sizeof (Elf_Internal_Verdaux);
5827 iverdef->vd_auxptr = bfd_alloc (abfd, amt);
5828 if (iverdef->vd_auxptr == NULL)
5831 everdaux = ((Elf_External_Verdaux *)
5832 ((bfd_byte *) everdef + iverdef->vd_aux));
5833 iverdaux = iverdef->vd_auxptr;
5834 for (j = 0; j < iverdef->vd_cnt; j++, iverdaux++)
5836 _bfd_elf_swap_verdaux_in (abfd, everdaux, iverdaux);
5838 iverdaux->vda_nodename =
5839 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
5840 iverdaux->vda_name);
5841 if (iverdaux->vda_nodename == NULL)
5844 if (j + 1 < iverdef->vd_cnt)
5845 iverdaux->vda_nextptr = iverdaux + 1;
5847 iverdaux->vda_nextptr = NULL;
5849 everdaux = ((Elf_External_Verdaux *)
5850 ((bfd_byte *) everdaux + iverdaux->vda_next));
5853 iverdef->vd_nodename = iverdef->vd_auxptr->vda_nodename;
5855 if (i + 1 < hdr->sh_info)
5856 iverdef->vd_nextdef = iverdef + 1;
5858 iverdef->vd_nextdef = NULL;
5860 everdef = ((Elf_External_Verdef *)
5861 ((bfd_byte *) everdef + iverdef->vd_next));
5868 if (elf_dynverref (abfd) != 0)
5870 Elf_Internal_Shdr *hdr;
5871 Elf_External_Verneed *everneed;
5872 Elf_Internal_Verneed *iverneed;
5875 hdr = &elf_tdata (abfd)->dynverref_hdr;
5877 amt = (bfd_size_type) hdr->sh_info * sizeof (Elf_Internal_Verneed);
5878 elf_tdata (abfd)->verref = bfd_zalloc (abfd, amt);
5879 if (elf_tdata (abfd)->verref == NULL)
5882 elf_tdata (abfd)->cverrefs = hdr->sh_info;
5884 contents = bfd_malloc (hdr->sh_size);
5885 if (contents == NULL)
5887 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
5888 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size)
5891 everneed = (Elf_External_Verneed *) contents;
5892 iverneed = elf_tdata (abfd)->verref;
5893 for (i = 0; i < hdr->sh_info; i++, iverneed++)
5895 Elf_External_Vernaux *evernaux;
5896 Elf_Internal_Vernaux *ivernaux;
5899 _bfd_elf_swap_verneed_in (abfd, everneed, iverneed);
5901 iverneed->vn_bfd = abfd;
5903 iverneed->vn_filename =
5904 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
5906 if (iverneed->vn_filename == NULL)
5909 amt = iverneed->vn_cnt;
5910 amt *= sizeof (Elf_Internal_Vernaux);
5911 iverneed->vn_auxptr = bfd_alloc (abfd, amt);
5913 evernaux = ((Elf_External_Vernaux *)
5914 ((bfd_byte *) everneed + iverneed->vn_aux));
5915 ivernaux = iverneed->vn_auxptr;
5916 for (j = 0; j < iverneed->vn_cnt; j++, ivernaux++)
5918 _bfd_elf_swap_vernaux_in (abfd, evernaux, ivernaux);
5920 ivernaux->vna_nodename =
5921 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
5922 ivernaux->vna_name);
5923 if (ivernaux->vna_nodename == NULL)
5926 if (j + 1 < iverneed->vn_cnt)
5927 ivernaux->vna_nextptr = ivernaux + 1;
5929 ivernaux->vna_nextptr = NULL;
5931 evernaux = ((Elf_External_Vernaux *)
5932 ((bfd_byte *) evernaux + ivernaux->vna_next));
5935 if (i + 1 < hdr->sh_info)
5936 iverneed->vn_nextref = iverneed + 1;
5938 iverneed->vn_nextref = NULL;
5940 everneed = ((Elf_External_Verneed *)
5941 ((bfd_byte *) everneed + iverneed->vn_next));
5951 if (contents != NULL)
5957 _bfd_elf_make_empty_symbol (bfd *abfd)
5959 elf_symbol_type *newsym;
5960 bfd_size_type amt = sizeof (elf_symbol_type);
5962 newsym = bfd_zalloc (abfd, amt);
5967 newsym->symbol.the_bfd = abfd;
5968 return &newsym->symbol;
5973 _bfd_elf_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED,
5977 bfd_symbol_info (symbol, ret);
5980 /* Return whether a symbol name implies a local symbol. Most targets
5981 use this function for the is_local_label_name entry point, but some
5985 _bfd_elf_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED,
5988 /* Normal local symbols start with ``.L''. */
5989 if (name[0] == '.' && name[1] == 'L')
5992 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
5993 DWARF debugging symbols starting with ``..''. */
5994 if (name[0] == '.' && name[1] == '.')
5997 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
5998 emitting DWARF debugging output. I suspect this is actually a
5999 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
6000 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
6001 underscore to be emitted on some ELF targets). For ease of use,
6002 we treat such symbols as local. */
6003 if (name[0] == '_' && name[1] == '.' && name[2] == 'L' && name[3] == '_')
6010 _bfd_elf_get_lineno (bfd *abfd ATTRIBUTE_UNUSED,
6011 asymbol *symbol ATTRIBUTE_UNUSED)
6018 _bfd_elf_set_arch_mach (bfd *abfd,
6019 enum bfd_architecture arch,
6020 unsigned long machine)
6022 /* If this isn't the right architecture for this backend, and this
6023 isn't the generic backend, fail. */
6024 if (arch != get_elf_backend_data (abfd)->arch
6025 && arch != bfd_arch_unknown
6026 && get_elf_backend_data (abfd)->arch != bfd_arch_unknown)
6029 return bfd_default_set_arch_mach (abfd, arch, machine);
6032 /* Find the function to a particular section and offset,
6033 for error reporting. */
6036 elf_find_function (bfd *abfd ATTRIBUTE_UNUSED,
6040 const char **filename_ptr,
6041 const char **functionname_ptr)
6043 const char *filename;
6052 for (p = symbols; *p != NULL; p++)
6056 q = (elf_symbol_type *) *p;
6058 if (bfd_get_section (&q->symbol) != section)
6061 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
6066 filename = bfd_asymbol_name (&q->symbol);
6070 if (q->symbol.section == section
6071 && q->symbol.value >= low_func
6072 && q->symbol.value <= offset)
6074 func = (asymbol *) q;
6075 low_func = q->symbol.value;
6085 *filename_ptr = filename;
6086 if (functionname_ptr)
6087 *functionname_ptr = bfd_asymbol_name (func);
6092 /* Find the nearest line to a particular section and offset,
6093 for error reporting. */
6096 _bfd_elf_find_nearest_line (bfd *abfd,
6100 const char **filename_ptr,
6101 const char **functionname_ptr,
6102 unsigned int *line_ptr)
6106 if (_bfd_dwarf1_find_nearest_line (abfd, section, symbols, offset,
6107 filename_ptr, functionname_ptr,
6110 if (!*functionname_ptr)
6111 elf_find_function (abfd, section, symbols, offset,
6112 *filename_ptr ? NULL : filename_ptr,
6118 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
6119 filename_ptr, functionname_ptr,
6121 &elf_tdata (abfd)->dwarf2_find_line_info))
6123 if (!*functionname_ptr)
6124 elf_find_function (abfd, section, symbols, offset,
6125 *filename_ptr ? NULL : filename_ptr,
6131 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
6132 &found, filename_ptr,
6133 functionname_ptr, line_ptr,
6134 &elf_tdata (abfd)->line_info))
6136 if (found && (*functionname_ptr || *line_ptr))
6139 if (symbols == NULL)
6142 if (! elf_find_function (abfd, section, symbols, offset,
6143 filename_ptr, functionname_ptr))
6151 _bfd_elf_sizeof_headers (bfd *abfd, bfd_boolean reloc)
6155 ret = get_elf_backend_data (abfd)->s->sizeof_ehdr;
6157 ret += get_program_header_size (abfd);
6162 _bfd_elf_set_section_contents (bfd *abfd,
6164 const void *location,
6166 bfd_size_type count)
6168 Elf_Internal_Shdr *hdr;
6171 if (! abfd->output_has_begun
6172 && ! _bfd_elf_compute_section_file_positions (abfd, NULL))
6175 hdr = &elf_section_data (section)->this_hdr;
6176 pos = hdr->sh_offset + offset;
6177 if (bfd_seek (abfd, pos, SEEK_SET) != 0
6178 || bfd_bwrite (location, count, abfd) != count)
6185 _bfd_elf_no_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
6186 arelent *cache_ptr ATTRIBUTE_UNUSED,
6187 Elf_Internal_Rela *dst ATTRIBUTE_UNUSED)
6192 /* Try to convert a non-ELF reloc into an ELF one. */
6195 _bfd_elf_validate_reloc (bfd *abfd, arelent *areloc)
6197 /* Check whether we really have an ELF howto. */
6199 if ((*areloc->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec)
6201 bfd_reloc_code_real_type code;
6202 reloc_howto_type *howto;
6204 /* Alien reloc: Try to determine its type to replace it with an
6205 equivalent ELF reloc. */
6207 if (areloc->howto->pc_relative)
6209 switch (areloc->howto->bitsize)
6212 code = BFD_RELOC_8_PCREL;
6215 code = BFD_RELOC_12_PCREL;
6218 code = BFD_RELOC_16_PCREL;
6221 code = BFD_RELOC_24_PCREL;
6224 code = BFD_RELOC_32_PCREL;
6227 code = BFD_RELOC_64_PCREL;
6233 howto = bfd_reloc_type_lookup (abfd, code);
6235 if (areloc->howto->pcrel_offset != howto->pcrel_offset)
6237 if (howto->pcrel_offset)
6238 areloc->addend += areloc->address;
6240 areloc->addend -= areloc->address; /* addend is unsigned!! */
6245 switch (areloc->howto->bitsize)
6251 code = BFD_RELOC_14;
6254 code = BFD_RELOC_16;
6257 code = BFD_RELOC_26;
6260 code = BFD_RELOC_32;
6263 code = BFD_RELOC_64;
6269 howto = bfd_reloc_type_lookup (abfd, code);
6273 areloc->howto = howto;
6281 (*_bfd_error_handler)
6282 (_("%s: unsupported relocation type %s"),
6283 bfd_archive_filename (abfd), areloc->howto->name);
6284 bfd_set_error (bfd_error_bad_value);
6289 _bfd_elf_close_and_cleanup (bfd *abfd)
6291 if (bfd_get_format (abfd) == bfd_object)
6293 if (elf_shstrtab (abfd) != NULL)
6294 _bfd_elf_strtab_free (elf_shstrtab (abfd));
6297 return _bfd_generic_close_and_cleanup (abfd);
6300 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
6301 in the relocation's offset. Thus we cannot allow any sort of sanity
6302 range-checking to interfere. There is nothing else to do in processing
6305 bfd_reloc_status_type
6306 _bfd_elf_rel_vtable_reloc_fn
6307 (bfd *abfd ATTRIBUTE_UNUSED, arelent *re ATTRIBUTE_UNUSED,
6308 struct bfd_symbol *symbol ATTRIBUTE_UNUSED,
6309 void *data ATTRIBUTE_UNUSED, asection *is ATTRIBUTE_UNUSED,
6310 bfd *obfd ATTRIBUTE_UNUSED, char **errmsg ATTRIBUTE_UNUSED)
6312 return bfd_reloc_ok;
6315 /* Elf core file support. Much of this only works on native
6316 toolchains, since we rely on knowing the
6317 machine-dependent procfs structure in order to pick
6318 out details about the corefile. */
6320 #ifdef HAVE_SYS_PROCFS_H
6321 # include <sys/procfs.h>
6324 /* FIXME: this is kinda wrong, but it's what gdb wants. */
6327 elfcore_make_pid (bfd *abfd)
6329 return ((elf_tdata (abfd)->core_lwpid << 16)
6330 + (elf_tdata (abfd)->core_pid));
6333 /* If there isn't a section called NAME, make one, using
6334 data from SECT. Note, this function will generate a
6335 reference to NAME, so you shouldn't deallocate or
6339 elfcore_maybe_make_sect (bfd *abfd, char *name, asection *sect)
6343 if (bfd_get_section_by_name (abfd, name) != NULL)
6346 sect2 = bfd_make_section (abfd, name);
6350 sect2->_raw_size = sect->_raw_size;
6351 sect2->filepos = sect->filepos;
6352 sect2->flags = sect->flags;
6353 sect2->alignment_power = sect->alignment_power;
6357 /* Create a pseudosection containing SIZE bytes at FILEPOS. This
6358 actually creates up to two pseudosections:
6359 - For the single-threaded case, a section named NAME, unless
6360 such a section already exists.
6361 - For the multi-threaded case, a section named "NAME/PID", where
6362 PID is elfcore_make_pid (abfd).
6363 Both pseudosections have identical contents. */
6365 _bfd_elfcore_make_pseudosection (bfd *abfd,
6371 char *threaded_name;
6375 /* Build the section name. */
6377 sprintf (buf, "%s/%d", name, elfcore_make_pid (abfd));
6378 len = strlen (buf) + 1;
6379 threaded_name = bfd_alloc (abfd, len);
6380 if (threaded_name == NULL)
6382 memcpy (threaded_name, buf, len);
6384 sect = bfd_make_section_anyway (abfd, threaded_name);
6387 sect->_raw_size = size;
6388 sect->filepos = filepos;
6389 sect->flags = SEC_HAS_CONTENTS;
6390 sect->alignment_power = 2;
6392 return elfcore_maybe_make_sect (abfd, name, sect);
6395 /* prstatus_t exists on:
6397 linux 2.[01] + glibc
6401 #if defined (HAVE_PRSTATUS_T)
6404 elfcore_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
6409 if (note->descsz == sizeof (prstatus_t))
6413 raw_size = sizeof (prstat.pr_reg);
6414 offset = offsetof (prstatus_t, pr_reg);
6415 memcpy (&prstat, note->descdata, sizeof (prstat));
6417 /* Do not overwrite the core signal if it
6418 has already been set by another thread. */
6419 if (elf_tdata (abfd)->core_signal == 0)
6420 elf_tdata (abfd)->core_signal = prstat.pr_cursig;
6421 elf_tdata (abfd)->core_pid = prstat.pr_pid;
6423 /* pr_who exists on:
6426 pr_who doesn't exist on:
6429 #if defined (HAVE_PRSTATUS_T_PR_WHO)
6430 elf_tdata (abfd)->core_lwpid = prstat.pr_who;
6433 #if defined (HAVE_PRSTATUS32_T)
6434 else if (note->descsz == sizeof (prstatus32_t))
6436 /* 64-bit host, 32-bit corefile */
6437 prstatus32_t prstat;
6439 raw_size = sizeof (prstat.pr_reg);
6440 offset = offsetof (prstatus32_t, pr_reg);
6441 memcpy (&prstat, note->descdata, sizeof (prstat));
6443 /* Do not overwrite the core signal if it
6444 has already been set by another thread. */
6445 if (elf_tdata (abfd)->core_signal == 0)
6446 elf_tdata (abfd)->core_signal = prstat.pr_cursig;
6447 elf_tdata (abfd)->core_pid = prstat.pr_pid;
6449 /* pr_who exists on:
6452 pr_who doesn't exist on:
6455 #if defined (HAVE_PRSTATUS32_T_PR_WHO)
6456 elf_tdata (abfd)->core_lwpid = prstat.pr_who;
6459 #endif /* HAVE_PRSTATUS32_T */
6462 /* Fail - we don't know how to handle any other
6463 note size (ie. data object type). */
6467 /* Make a ".reg/999" section and a ".reg" section. */
6468 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
6469 raw_size, note->descpos + offset);
6471 #endif /* defined (HAVE_PRSTATUS_T) */
6473 /* Create a pseudosection containing the exact contents of NOTE. */
6475 elfcore_make_note_pseudosection (bfd *abfd,
6477 Elf_Internal_Note *note)
6479 return _bfd_elfcore_make_pseudosection (abfd, name,
6480 note->descsz, note->descpos);
6483 /* There isn't a consistent prfpregset_t across platforms,
6484 but it doesn't matter, because we don't have to pick this
6485 data structure apart. */
6488 elfcore_grok_prfpreg (bfd *abfd, Elf_Internal_Note *note)
6490 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
6493 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
6494 type of 5 (NT_PRXFPREG). Just include the whole note's contents
6498 elfcore_grok_prxfpreg (bfd *abfd, Elf_Internal_Note *note)
6500 return elfcore_make_note_pseudosection (abfd, ".reg-xfp", note);
6503 #if defined (HAVE_PRPSINFO_T)
6504 typedef prpsinfo_t elfcore_psinfo_t;
6505 #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
6506 typedef prpsinfo32_t elfcore_psinfo32_t;
6510 #if defined (HAVE_PSINFO_T)
6511 typedef psinfo_t elfcore_psinfo_t;
6512 #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
6513 typedef psinfo32_t elfcore_psinfo32_t;
6517 /* return a malloc'ed copy of a string at START which is at
6518 most MAX bytes long, possibly without a terminating '\0'.
6519 the copy will always have a terminating '\0'. */
6522 _bfd_elfcore_strndup (bfd *abfd, char *start, size_t max)
6525 char *end = memchr (start, '\0', max);
6533 dups = bfd_alloc (abfd, len + 1);
6537 memcpy (dups, start, len);
6543 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
6545 elfcore_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
6547 if (note->descsz == sizeof (elfcore_psinfo_t))
6549 elfcore_psinfo_t psinfo;
6551 memcpy (&psinfo, note->descdata, sizeof (psinfo));
6553 elf_tdata (abfd)->core_program
6554 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
6555 sizeof (psinfo.pr_fname));
6557 elf_tdata (abfd)->core_command
6558 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
6559 sizeof (psinfo.pr_psargs));
6561 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
6562 else if (note->descsz == sizeof (elfcore_psinfo32_t))
6564 /* 64-bit host, 32-bit corefile */
6565 elfcore_psinfo32_t psinfo;
6567 memcpy (&psinfo, note->descdata, sizeof (psinfo));
6569 elf_tdata (abfd)->core_program
6570 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
6571 sizeof (psinfo.pr_fname));
6573 elf_tdata (abfd)->core_command
6574 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
6575 sizeof (psinfo.pr_psargs));
6581 /* Fail - we don't know how to handle any other
6582 note size (ie. data object type). */
6586 /* Note that for some reason, a spurious space is tacked
6587 onto the end of the args in some (at least one anyway)
6588 implementations, so strip it off if it exists. */
6591 char *command = elf_tdata (abfd)->core_command;
6592 int n = strlen (command);
6594 if (0 < n && command[n - 1] == ' ')
6595 command[n - 1] = '\0';
6600 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
6602 #if defined (HAVE_PSTATUS_T)
6604 elfcore_grok_pstatus (bfd *abfd, Elf_Internal_Note *note)
6606 if (note->descsz == sizeof (pstatus_t)
6607 #if defined (HAVE_PXSTATUS_T)
6608 || note->descsz == sizeof (pxstatus_t)
6614 memcpy (&pstat, note->descdata, sizeof (pstat));
6616 elf_tdata (abfd)->core_pid = pstat.pr_pid;
6618 #if defined (HAVE_PSTATUS32_T)
6619 else if (note->descsz == sizeof (pstatus32_t))
6621 /* 64-bit host, 32-bit corefile */
6624 memcpy (&pstat, note->descdata, sizeof (pstat));
6626 elf_tdata (abfd)->core_pid = pstat.pr_pid;
6629 /* Could grab some more details from the "representative"
6630 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
6631 NT_LWPSTATUS note, presumably. */
6635 #endif /* defined (HAVE_PSTATUS_T) */
6637 #if defined (HAVE_LWPSTATUS_T)
6639 elfcore_grok_lwpstatus (bfd *abfd, Elf_Internal_Note *note)
6641 lwpstatus_t lwpstat;
6647 if (note->descsz != sizeof (lwpstat)
6648 #if defined (HAVE_LWPXSTATUS_T)
6649 && note->descsz != sizeof (lwpxstatus_t)
6654 memcpy (&lwpstat, note->descdata, sizeof (lwpstat));
6656 elf_tdata (abfd)->core_lwpid = lwpstat.pr_lwpid;
6657 elf_tdata (abfd)->core_signal = lwpstat.pr_cursig;
6659 /* Make a ".reg/999" section. */
6661 sprintf (buf, ".reg/%d", elfcore_make_pid (abfd));
6662 len = strlen (buf) + 1;
6663 name = bfd_alloc (abfd, len);
6666 memcpy (name, buf, len);
6668 sect = bfd_make_section_anyway (abfd, name);
6672 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
6673 sect->_raw_size = sizeof (lwpstat.pr_context.uc_mcontext.gregs);
6674 sect->filepos = note->descpos
6675 + offsetof (lwpstatus_t, pr_context.uc_mcontext.gregs);
6678 #if defined (HAVE_LWPSTATUS_T_PR_REG)
6679 sect->_raw_size = sizeof (lwpstat.pr_reg);
6680 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_reg);
6683 sect->flags = SEC_HAS_CONTENTS;
6684 sect->alignment_power = 2;
6686 if (!elfcore_maybe_make_sect (abfd, ".reg", sect))
6689 /* Make a ".reg2/999" section */
6691 sprintf (buf, ".reg2/%d", elfcore_make_pid (abfd));
6692 len = strlen (buf) + 1;
6693 name = bfd_alloc (abfd, len);
6696 memcpy (name, buf, len);
6698 sect = bfd_make_section_anyway (abfd, name);
6702 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
6703 sect->_raw_size = sizeof (lwpstat.pr_context.uc_mcontext.fpregs);
6704 sect->filepos = note->descpos
6705 + offsetof (lwpstatus_t, pr_context.uc_mcontext.fpregs);
6708 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
6709 sect->_raw_size = sizeof (lwpstat.pr_fpreg);
6710 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_fpreg);
6713 sect->flags = SEC_HAS_CONTENTS;
6714 sect->alignment_power = 2;
6716 return elfcore_maybe_make_sect (abfd, ".reg2", sect);
6718 #endif /* defined (HAVE_LWPSTATUS_T) */
6720 #if defined (HAVE_WIN32_PSTATUS_T)
6722 elfcore_grok_win32pstatus (bfd *abfd, Elf_Internal_Note *note)
6728 win32_pstatus_t pstatus;
6730 if (note->descsz < sizeof (pstatus))
6733 memcpy (&pstatus, note->descdata, sizeof (pstatus));
6735 switch (pstatus.data_type)
6737 case NOTE_INFO_PROCESS:
6738 /* FIXME: need to add ->core_command. */
6739 elf_tdata (abfd)->core_signal = pstatus.data.process_info.signal;
6740 elf_tdata (abfd)->core_pid = pstatus.data.process_info.pid;
6743 case NOTE_INFO_THREAD:
6744 /* Make a ".reg/999" section. */
6745 sprintf (buf, ".reg/%d", pstatus.data.thread_info.tid);
6747 len = strlen (buf) + 1;
6748 name = bfd_alloc (abfd, len);
6752 memcpy (name, buf, len);
6754 sect = bfd_make_section_anyway (abfd, name);
6758 sect->_raw_size = sizeof (pstatus.data.thread_info.thread_context);
6759 sect->filepos = (note->descpos
6760 + offsetof (struct win32_pstatus,
6761 data.thread_info.thread_context));
6762 sect->flags = SEC_HAS_CONTENTS;
6763 sect->alignment_power = 2;
6765 if (pstatus.data.thread_info.is_active_thread)
6766 if (! elfcore_maybe_make_sect (abfd, ".reg", sect))
6770 case NOTE_INFO_MODULE:
6771 /* Make a ".module/xxxxxxxx" section. */
6772 sprintf (buf, ".module/%08x", pstatus.data.module_info.base_address);
6774 len = strlen (buf) + 1;
6775 name = bfd_alloc (abfd, len);
6779 memcpy (name, buf, len);
6781 sect = bfd_make_section_anyway (abfd, name);
6786 sect->_raw_size = note->descsz;
6787 sect->filepos = note->descpos;
6788 sect->flags = SEC_HAS_CONTENTS;
6789 sect->alignment_power = 2;
6798 #endif /* HAVE_WIN32_PSTATUS_T */
6801 elfcore_grok_note (bfd *abfd, Elf_Internal_Note *note)
6803 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6811 if (bed->elf_backend_grok_prstatus)
6812 if ((*bed->elf_backend_grok_prstatus) (abfd, note))
6814 #if defined (HAVE_PRSTATUS_T)
6815 return elfcore_grok_prstatus (abfd, note);
6820 #if defined (HAVE_PSTATUS_T)
6822 return elfcore_grok_pstatus (abfd, note);
6825 #if defined (HAVE_LWPSTATUS_T)
6827 return elfcore_grok_lwpstatus (abfd, note);
6830 case NT_FPREGSET: /* FIXME: rename to NT_PRFPREG */
6831 return elfcore_grok_prfpreg (abfd, note);
6833 #if defined (HAVE_WIN32_PSTATUS_T)
6834 case NT_WIN32PSTATUS:
6835 return elfcore_grok_win32pstatus (abfd, note);
6838 case NT_PRXFPREG: /* Linux SSE extension */
6839 if (note->namesz == 6
6840 && strcmp (note->namedata, "LINUX") == 0)
6841 return elfcore_grok_prxfpreg (abfd, note);
6847 if (bed->elf_backend_grok_psinfo)
6848 if ((*bed->elf_backend_grok_psinfo) (abfd, note))
6850 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
6851 return elfcore_grok_psinfo (abfd, note);
6858 asection *sect = bfd_make_section_anyway (abfd, ".auxv");
6862 sect->_raw_size = note->descsz;
6863 sect->filepos = note->descpos;
6864 sect->flags = SEC_HAS_CONTENTS;
6865 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32;
6873 elfcore_netbsd_get_lwpid (Elf_Internal_Note *note, int *lwpidp)
6877 cp = strchr (note->namedata, '@');
6880 *lwpidp = atoi(cp + 1);
6887 elfcore_grok_netbsd_procinfo (bfd *abfd, Elf_Internal_Note *note)
6890 /* Signal number at offset 0x08. */
6891 elf_tdata (abfd)->core_signal
6892 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x08);
6894 /* Process ID at offset 0x50. */
6895 elf_tdata (abfd)->core_pid
6896 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x50);
6898 /* Command name at 0x7c (max 32 bytes, including nul). */
6899 elf_tdata (abfd)->core_command
6900 = _bfd_elfcore_strndup (abfd, note->descdata + 0x7c, 31);
6902 return elfcore_make_note_pseudosection (abfd, ".note.netbsdcore.procinfo",
6907 elfcore_grok_netbsd_note (bfd *abfd, Elf_Internal_Note *note)
6911 if (elfcore_netbsd_get_lwpid (note, &lwp))
6912 elf_tdata (abfd)->core_lwpid = lwp;
6914 if (note->type == NT_NETBSDCORE_PROCINFO)
6916 /* NetBSD-specific core "procinfo". Note that we expect to
6917 find this note before any of the others, which is fine,
6918 since the kernel writes this note out first when it
6919 creates a core file. */
6921 return elfcore_grok_netbsd_procinfo (abfd, note);
6924 /* As of Jan 2002 there are no other machine-independent notes
6925 defined for NetBSD core files. If the note type is less
6926 than the start of the machine-dependent note types, we don't
6929 if (note->type < NT_NETBSDCORE_FIRSTMACH)
6933 switch (bfd_get_arch (abfd))
6935 /* On the Alpha, SPARC (32-bit and 64-bit), PT_GETREGS == mach+0 and
6936 PT_GETFPREGS == mach+2. */
6938 case bfd_arch_alpha:
6939 case bfd_arch_sparc:
6942 case NT_NETBSDCORE_FIRSTMACH+0:
6943 return elfcore_make_note_pseudosection (abfd, ".reg", note);
6945 case NT_NETBSDCORE_FIRSTMACH+2:
6946 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
6952 /* On all other arch's, PT_GETREGS == mach+1 and
6953 PT_GETFPREGS == mach+3. */
6958 case NT_NETBSDCORE_FIRSTMACH+1:
6959 return elfcore_make_note_pseudosection (abfd, ".reg", note);
6961 case NT_NETBSDCORE_FIRSTMACH+3:
6962 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
6972 elfcore_grok_nto_status (bfd *abfd, Elf_Internal_Note *note, pid_t *tid)
6974 void *ddata = note->descdata;
6981 /* nto_procfs_status 'pid' field is at offset 0. */
6982 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, (bfd_byte *) ddata);
6984 /* nto_procfs_status 'tid' field is at offset 4. Pass it back. */
6985 *tid = bfd_get_32 (abfd, (bfd_byte *) ddata + 4);
6987 /* nto_procfs_status 'flags' field is at offset 8. */
6988 flags = bfd_get_32 (abfd, (bfd_byte *) ddata + 8);
6990 /* nto_procfs_status 'what' field is at offset 14. */
6991 if ((sig = bfd_get_16 (abfd, (bfd_byte *) ddata + 14)) > 0)
6993 elf_tdata (abfd)->core_signal = sig;
6994 elf_tdata (abfd)->core_lwpid = *tid;
6997 /* _DEBUG_FLAG_CURTID (current thread) is 0x80. Some cores
6998 do not come from signals so we make sure we set the current
6999 thread just in case. */
7000 if (flags & 0x00000080)
7001 elf_tdata (abfd)->core_lwpid = *tid;
7003 /* Make a ".qnx_core_status/%d" section. */
7004 sprintf (buf, ".qnx_core_status/%d", *tid);
7006 name = bfd_alloc (abfd, strlen (buf) + 1);
7011 sect = bfd_make_section_anyway (abfd, name);
7015 sect->_raw_size = note->descsz;
7016 sect->filepos = note->descpos;
7017 sect->flags = SEC_HAS_CONTENTS;
7018 sect->alignment_power = 2;
7020 return (elfcore_maybe_make_sect (abfd, ".qnx_core_status", sect));
7024 elfcore_grok_nto_gregs (bfd *abfd, Elf_Internal_Note *note, pid_t tid)
7030 /* Make a ".reg/%d" section. */
7031 sprintf (buf, ".reg/%d", tid);
7033 name = bfd_alloc (abfd, strlen (buf) + 1);
7038 sect = bfd_make_section_anyway (abfd, name);
7042 sect->_raw_size = note->descsz;
7043 sect->filepos = note->descpos;
7044 sect->flags = SEC_HAS_CONTENTS;
7045 sect->alignment_power = 2;
7047 /* This is the current thread. */
7048 if (elf_tdata (abfd)->core_lwpid == tid)
7049 return elfcore_maybe_make_sect (abfd, ".reg", sect);
7054 #define BFD_QNT_CORE_INFO 7
7055 #define BFD_QNT_CORE_STATUS 8
7056 #define BFD_QNT_CORE_GREG 9
7057 #define BFD_QNT_CORE_FPREG 10
7060 elfcore_grok_nto_note (bfd *abfd, Elf_Internal_Note *note)
7062 /* Every GREG section has a STATUS section before it. Store the
7063 tid from the previous call to pass down to the next gregs
7065 static pid_t tid = 1;
7069 case BFD_QNT_CORE_INFO: return elfcore_make_note_pseudosection (abfd, ".qnx_core_info", note);
7070 case BFD_QNT_CORE_STATUS: return elfcore_grok_nto_status (abfd, note, &tid);
7071 case BFD_QNT_CORE_GREG: return elfcore_grok_nto_gregs (abfd, note, tid);
7072 case BFD_QNT_CORE_FPREG: return elfcore_grok_prfpreg (abfd, note);
7073 default: return TRUE;
7077 /* Function: elfcore_write_note
7084 size of data for note
7087 End of buffer containing note. */
7090 elfcore_write_note (bfd *abfd,
7098 Elf_External_Note *xnp;
7108 const struct elf_backend_data *bed;
7110 namesz = strlen (name) + 1;
7111 bed = get_elf_backend_data (abfd);
7112 pad = -namesz & ((1 << bed->s->log_file_align) - 1);
7115 newspace = 12 + namesz + pad + size;
7117 p = realloc (buf, *bufsiz + newspace);
7119 *bufsiz += newspace;
7120 xnp = (Elf_External_Note *) dest;
7121 H_PUT_32 (abfd, namesz, xnp->namesz);
7122 H_PUT_32 (abfd, size, xnp->descsz);
7123 H_PUT_32 (abfd, type, xnp->type);
7127 memcpy (dest, name, namesz);
7135 memcpy (dest, input, size);
7139 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7141 elfcore_write_prpsinfo (bfd *abfd,
7148 char *note_name = "CORE";
7150 #if defined (HAVE_PSINFO_T)
7152 note_type = NT_PSINFO;
7155 note_type = NT_PRPSINFO;
7158 memset (&data, 0, sizeof (data));
7159 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
7160 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
7161 return elfcore_write_note (abfd, buf, bufsiz,
7162 note_name, note_type, &data, sizeof (data));
7164 #endif /* PSINFO_T or PRPSINFO_T */
7166 #if defined (HAVE_PRSTATUS_T)
7168 elfcore_write_prstatus (bfd *abfd,
7176 char *note_name = "CORE";
7178 memset (&prstat, 0, sizeof (prstat));
7179 prstat.pr_pid = pid;
7180 prstat.pr_cursig = cursig;
7181 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
7182 return elfcore_write_note (abfd, buf, bufsiz,
7183 note_name, NT_PRSTATUS, &prstat, sizeof (prstat));
7185 #endif /* HAVE_PRSTATUS_T */
7187 #if defined (HAVE_LWPSTATUS_T)
7189 elfcore_write_lwpstatus (bfd *abfd,
7196 lwpstatus_t lwpstat;
7197 char *note_name = "CORE";
7199 memset (&lwpstat, 0, sizeof (lwpstat));
7200 lwpstat.pr_lwpid = pid >> 16;
7201 lwpstat.pr_cursig = cursig;
7202 #if defined (HAVE_LWPSTATUS_T_PR_REG)
7203 memcpy (lwpstat.pr_reg, gregs, sizeof (lwpstat.pr_reg));
7204 #elif defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7206 memcpy (lwpstat.pr_context.uc_mcontext.gregs,
7207 gregs, sizeof (lwpstat.pr_context.uc_mcontext.gregs));
7209 memcpy (lwpstat.pr_context.uc_mcontext.__gregs,
7210 gregs, sizeof (lwpstat.pr_context.uc_mcontext.__gregs));
7213 return elfcore_write_note (abfd, buf, bufsiz, note_name,
7214 NT_LWPSTATUS, &lwpstat, sizeof (lwpstat));
7216 #endif /* HAVE_LWPSTATUS_T */
7218 #if defined (HAVE_PSTATUS_T)
7220 elfcore_write_pstatus (bfd *abfd,
7228 char *note_name = "CORE";
7230 memset (&pstat, 0, sizeof (pstat));
7231 pstat.pr_pid = pid & 0xffff;
7232 buf = elfcore_write_note (abfd, buf, bufsiz, note_name,
7233 NT_PSTATUS, &pstat, sizeof (pstat));
7236 #endif /* HAVE_PSTATUS_T */
7239 elfcore_write_prfpreg (bfd *abfd,
7245 char *note_name = "CORE";
7246 return elfcore_write_note (abfd, buf, bufsiz,
7247 note_name, NT_FPREGSET, fpregs, size);
7251 elfcore_write_prxfpreg (bfd *abfd,
7254 const void *xfpregs,
7257 char *note_name = "LINUX";
7258 return elfcore_write_note (abfd, buf, bufsiz,
7259 note_name, NT_PRXFPREG, xfpregs, size);
7263 elfcore_read_notes (bfd *abfd, file_ptr offset, bfd_size_type size)
7271 if (bfd_seek (abfd, offset, SEEK_SET) != 0)
7274 buf = bfd_malloc (size);
7278 if (bfd_bread (buf, size, abfd) != size)
7286 while (p < buf + size)
7288 /* FIXME: bad alignment assumption. */
7289 Elf_External_Note *xnp = (Elf_External_Note *) p;
7290 Elf_Internal_Note in;
7292 in.type = H_GET_32 (abfd, xnp->type);
7294 in.namesz = H_GET_32 (abfd, xnp->namesz);
7295 in.namedata = xnp->name;
7297 in.descsz = H_GET_32 (abfd, xnp->descsz);
7298 in.descdata = in.namedata + BFD_ALIGN (in.namesz, 4);
7299 in.descpos = offset + (in.descdata - buf);
7301 if (strncmp (in.namedata, "NetBSD-CORE", 11) == 0)
7303 if (! elfcore_grok_netbsd_note (abfd, &in))
7306 else if (strncmp (in.namedata, "QNX", 3) == 0)
7308 if (! elfcore_grok_nto_note (abfd, &in))
7313 if (! elfcore_grok_note (abfd, &in))
7317 p = in.descdata + BFD_ALIGN (in.descsz, 4);
7324 /* Providing external access to the ELF program header table. */
7326 /* Return an upper bound on the number of bytes required to store a
7327 copy of ABFD's program header table entries. Return -1 if an error
7328 occurs; bfd_get_error will return an appropriate code. */
7331 bfd_get_elf_phdr_upper_bound (bfd *abfd)
7333 if (abfd->xvec->flavour != bfd_target_elf_flavour)
7335 bfd_set_error (bfd_error_wrong_format);
7339 return elf_elfheader (abfd)->e_phnum * sizeof (Elf_Internal_Phdr);
7342 /* Copy ABFD's program header table entries to *PHDRS. The entries
7343 will be stored as an array of Elf_Internal_Phdr structures, as
7344 defined in include/elf/internal.h. To find out how large the
7345 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
7347 Return the number of program header table entries read, or -1 if an
7348 error occurs; bfd_get_error will return an appropriate code. */
7351 bfd_get_elf_phdrs (bfd *abfd, void *phdrs)
7355 if (abfd->xvec->flavour != bfd_target_elf_flavour)
7357 bfd_set_error (bfd_error_wrong_format);
7361 num_phdrs = elf_elfheader (abfd)->e_phnum;
7362 memcpy (phdrs, elf_tdata (abfd)->phdr,
7363 num_phdrs * sizeof (Elf_Internal_Phdr));
7369 _bfd_elf_sprintf_vma (bfd *abfd ATTRIBUTE_UNUSED, char *buf, bfd_vma value)
7372 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
7374 i_ehdrp = elf_elfheader (abfd);
7375 if (i_ehdrp == NULL)
7376 sprintf_vma (buf, value);
7379 if (i_ehdrp->e_ident[EI_CLASS] == ELFCLASS64)
7381 #if BFD_HOST_64BIT_LONG
7382 sprintf (buf, "%016lx", value);
7384 sprintf (buf, "%08lx%08lx", _bfd_int64_high (value),
7385 _bfd_int64_low (value));
7389 sprintf (buf, "%08lx", (unsigned long) (value & 0xffffffff));
7392 sprintf_vma (buf, value);
7397 _bfd_elf_fprintf_vma (bfd *abfd ATTRIBUTE_UNUSED, void *stream, bfd_vma value)
7400 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
7402 i_ehdrp = elf_elfheader (abfd);
7403 if (i_ehdrp == NULL)
7404 fprintf_vma ((FILE *) stream, value);
7407 if (i_ehdrp->e_ident[EI_CLASS] == ELFCLASS64)
7409 #if BFD_HOST_64BIT_LONG
7410 fprintf ((FILE *) stream, "%016lx", value);
7412 fprintf ((FILE *) stream, "%08lx%08lx",
7413 _bfd_int64_high (value), _bfd_int64_low (value));
7417 fprintf ((FILE *) stream, "%08lx",
7418 (unsigned long) (value & 0xffffffff));
7421 fprintf_vma ((FILE *) stream, value);
7425 enum elf_reloc_type_class
7426 _bfd_elf_reloc_type_class (const Elf_Internal_Rela *rela ATTRIBUTE_UNUSED)
7428 return reloc_class_normal;
7431 /* For RELA architectures, return the relocation value for a
7432 relocation against a local symbol. */
7435 _bfd_elf_rela_local_sym (bfd *abfd,
7436 Elf_Internal_Sym *sym,
7438 Elf_Internal_Rela *rel)
7440 asection *sec = *psec;
7443 relocation = (sec->output_section->vma
7444 + sec->output_offset
7446 if ((sec->flags & SEC_MERGE)
7447 && ELF_ST_TYPE (sym->st_info) == STT_SECTION
7448 && sec->sec_info_type == ELF_INFO_TYPE_MERGE)
7451 _bfd_merged_section_offset (abfd, psec,
7452 elf_section_data (sec)->sec_info,
7453 sym->st_value + rel->r_addend,
7456 rel->r_addend -= relocation;
7457 rel->r_addend += sec->output_section->vma + sec->output_offset;
7463 _bfd_elf_rel_local_sym (bfd *abfd,
7464 Elf_Internal_Sym *sym,
7468 asection *sec = *psec;
7470 if (sec->sec_info_type != ELF_INFO_TYPE_MERGE)
7471 return sym->st_value + addend;
7473 return _bfd_merged_section_offset (abfd, psec,
7474 elf_section_data (sec)->sec_info,
7475 sym->st_value + addend, 0);
7479 _bfd_elf_section_offset (bfd *abfd,
7480 struct bfd_link_info *info,
7484 struct bfd_elf_section_data *sec_data;
7486 sec_data = elf_section_data (sec);
7487 switch (sec->sec_info_type)
7489 case ELF_INFO_TYPE_STABS:
7490 return _bfd_stab_section_offset (abfd,
7491 &elf_hash_table (info)->merge_info,
7492 sec, &sec_data->sec_info, offset);
7493 case ELF_INFO_TYPE_EH_FRAME:
7494 return _bfd_elf_eh_frame_section_offset (abfd, sec, offset);
7500 /* Create a new BFD as if by bfd_openr. Rather than opening a file,
7501 reconstruct an ELF file by reading the segments out of remote memory
7502 based on the ELF file header at EHDR_VMA and the ELF program headers it
7503 points to. If not null, *LOADBASEP is filled in with the difference
7504 between the VMAs from which the segments were read, and the VMAs the
7505 file headers (and hence BFD's idea of each section's VMA) put them at.
7507 The function TARGET_READ_MEMORY is called to copy LEN bytes from the
7508 remote memory at target address VMA into the local buffer at MYADDR; it
7509 should return zero on success or an `errno' code on failure. TEMPL must
7510 be a BFD for an ELF target with the word size and byte order found in
7511 the remote memory. */
7514 bfd_elf_bfd_from_remote_memory
7518 int (*target_read_memory) (bfd_vma, char *, int))
7520 return (*get_elf_backend_data (templ)->elf_backend_bfd_from_remote_memory)
7521 (templ, ehdr_vma, loadbasep, target_read_memory);