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. */
26 BFD support for ELF formats is being worked on.
27 Currently, the best supported back ends are for sparc and i386
28 (running svr4 or Solaris 2).
30 Documentation of the internals of the support code still needs
31 to be written. The code is changing quickly enough that we
32 haven't bothered yet. */
34 /* For sparc64-cross-sparc32. */
42 #include "libiberty.h"
44 static int elf_sort_sections (const void *, const void *);
45 static bfd_boolean assign_file_positions_except_relocs (bfd *, struct bfd_link_info *);
46 static bfd_boolean prep_headers (bfd *);
47 static bfd_boolean swap_out_syms (bfd *, struct bfd_strtab_hash **, int) ;
48 static bfd_boolean elfcore_read_notes (bfd *, file_ptr, bfd_size_type) ;
50 /* Swap version information in and out. The version information is
51 currently size independent. If that ever changes, this code will
52 need to move into elfcode.h. */
54 /* Swap in a Verdef structure. */
57 _bfd_elf_swap_verdef_in (bfd *abfd,
58 const Elf_External_Verdef *src,
59 Elf_Internal_Verdef *dst)
61 dst->vd_version = H_GET_16 (abfd, src->vd_version);
62 dst->vd_flags = H_GET_16 (abfd, src->vd_flags);
63 dst->vd_ndx = H_GET_16 (abfd, src->vd_ndx);
64 dst->vd_cnt = H_GET_16 (abfd, src->vd_cnt);
65 dst->vd_hash = H_GET_32 (abfd, src->vd_hash);
66 dst->vd_aux = H_GET_32 (abfd, src->vd_aux);
67 dst->vd_next = H_GET_32 (abfd, src->vd_next);
70 /* Swap out a Verdef structure. */
73 _bfd_elf_swap_verdef_out (bfd *abfd,
74 const Elf_Internal_Verdef *src,
75 Elf_External_Verdef *dst)
77 H_PUT_16 (abfd, src->vd_version, dst->vd_version);
78 H_PUT_16 (abfd, src->vd_flags, dst->vd_flags);
79 H_PUT_16 (abfd, src->vd_ndx, dst->vd_ndx);
80 H_PUT_16 (abfd, src->vd_cnt, dst->vd_cnt);
81 H_PUT_32 (abfd, src->vd_hash, dst->vd_hash);
82 H_PUT_32 (abfd, src->vd_aux, dst->vd_aux);
83 H_PUT_32 (abfd, src->vd_next, dst->vd_next);
86 /* Swap in a Verdaux structure. */
89 _bfd_elf_swap_verdaux_in (bfd *abfd,
90 const Elf_External_Verdaux *src,
91 Elf_Internal_Verdaux *dst)
93 dst->vda_name = H_GET_32 (abfd, src->vda_name);
94 dst->vda_next = H_GET_32 (abfd, src->vda_next);
97 /* Swap out a Verdaux structure. */
100 _bfd_elf_swap_verdaux_out (bfd *abfd,
101 const Elf_Internal_Verdaux *src,
102 Elf_External_Verdaux *dst)
104 H_PUT_32 (abfd, src->vda_name, dst->vda_name);
105 H_PUT_32 (abfd, src->vda_next, dst->vda_next);
108 /* Swap in a Verneed structure. */
111 _bfd_elf_swap_verneed_in (bfd *abfd,
112 const Elf_External_Verneed *src,
113 Elf_Internal_Verneed *dst)
115 dst->vn_version = H_GET_16 (abfd, src->vn_version);
116 dst->vn_cnt = H_GET_16 (abfd, src->vn_cnt);
117 dst->vn_file = H_GET_32 (abfd, src->vn_file);
118 dst->vn_aux = H_GET_32 (abfd, src->vn_aux);
119 dst->vn_next = H_GET_32 (abfd, src->vn_next);
122 /* Swap out a Verneed structure. */
125 _bfd_elf_swap_verneed_out (bfd *abfd,
126 const Elf_Internal_Verneed *src,
127 Elf_External_Verneed *dst)
129 H_PUT_16 (abfd, src->vn_version, dst->vn_version);
130 H_PUT_16 (abfd, src->vn_cnt, dst->vn_cnt);
131 H_PUT_32 (abfd, src->vn_file, dst->vn_file);
132 H_PUT_32 (abfd, src->vn_aux, dst->vn_aux);
133 H_PUT_32 (abfd, src->vn_next, dst->vn_next);
136 /* Swap in a Vernaux structure. */
139 _bfd_elf_swap_vernaux_in (bfd *abfd,
140 const Elf_External_Vernaux *src,
141 Elf_Internal_Vernaux *dst)
143 dst->vna_hash = H_GET_32 (abfd, src->vna_hash);
144 dst->vna_flags = H_GET_16 (abfd, src->vna_flags);
145 dst->vna_other = H_GET_16 (abfd, src->vna_other);
146 dst->vna_name = H_GET_32 (abfd, src->vna_name);
147 dst->vna_next = H_GET_32 (abfd, src->vna_next);
150 /* Swap out a Vernaux structure. */
153 _bfd_elf_swap_vernaux_out (bfd *abfd,
154 const Elf_Internal_Vernaux *src,
155 Elf_External_Vernaux *dst)
157 H_PUT_32 (abfd, src->vna_hash, dst->vna_hash);
158 H_PUT_16 (abfd, src->vna_flags, dst->vna_flags);
159 H_PUT_16 (abfd, src->vna_other, dst->vna_other);
160 H_PUT_32 (abfd, src->vna_name, dst->vna_name);
161 H_PUT_32 (abfd, src->vna_next, dst->vna_next);
164 /* Swap in a Versym structure. */
167 _bfd_elf_swap_versym_in (bfd *abfd,
168 const Elf_External_Versym *src,
169 Elf_Internal_Versym *dst)
171 dst->vs_vers = H_GET_16 (abfd, src->vs_vers);
174 /* Swap out a Versym structure. */
177 _bfd_elf_swap_versym_out (bfd *abfd,
178 const Elf_Internal_Versym *src,
179 Elf_External_Versym *dst)
181 H_PUT_16 (abfd, src->vs_vers, dst->vs_vers);
184 /* Standard ELF hash function. Do not change this function; you will
185 cause invalid hash tables to be generated. */
188 bfd_elf_hash (const char *namearg)
190 const unsigned char *name = (const unsigned char *) namearg;
195 while ((ch = *name++) != '\0')
198 if ((g = (h & 0xf0000000)) != 0)
201 /* The ELF ABI says `h &= ~g', but this is equivalent in
202 this case and on some machines one insn instead of two. */
206 return h & 0xffffffff;
209 /* Read a specified number of bytes at a specified offset in an ELF
210 file, into a newly allocated buffer, and return a pointer to the
214 elf_read (bfd *abfd, file_ptr offset, bfd_size_type size)
218 if ((buf = bfd_alloc (abfd, size)) == NULL)
220 if (bfd_seek (abfd, offset, SEEK_SET) != 0)
222 if (bfd_bread (buf, size, abfd) != size)
224 if (bfd_get_error () != bfd_error_system_call)
225 bfd_set_error (bfd_error_file_truncated);
232 bfd_elf_mkobject (bfd *abfd)
234 /* This just does initialization. */
235 /* coff_mkobject zalloc's space for tdata.coff_obj_data ... */
236 elf_tdata (abfd) = bfd_zalloc (abfd, sizeof (struct elf_obj_tdata));
237 if (elf_tdata (abfd) == 0)
239 /* Since everything is done at close time, do we need any
246 bfd_elf_mkcorefile (bfd *abfd)
248 /* I think this can be done just like an object file. */
249 return bfd_elf_mkobject (abfd);
253 bfd_elf_get_str_section (bfd *abfd, unsigned int shindex)
255 Elf_Internal_Shdr **i_shdrp;
256 char *shstrtab = NULL;
258 bfd_size_type shstrtabsize;
260 i_shdrp = elf_elfsections (abfd);
261 if (i_shdrp == 0 || i_shdrp[shindex] == 0)
264 shstrtab = (char *) i_shdrp[shindex]->contents;
265 if (shstrtab == NULL)
267 /* No cached one, attempt to read, and cache what we read. */
268 offset = i_shdrp[shindex]->sh_offset;
269 shstrtabsize = i_shdrp[shindex]->sh_size;
270 shstrtab = elf_read (abfd, offset, shstrtabsize);
271 i_shdrp[shindex]->contents = shstrtab;
277 bfd_elf_string_from_elf_section (bfd *abfd,
278 unsigned int shindex,
279 unsigned int strindex)
281 Elf_Internal_Shdr *hdr;
286 hdr = elf_elfsections (abfd)[shindex];
288 if (hdr->contents == NULL
289 && bfd_elf_get_str_section (abfd, shindex) == NULL)
292 if (strindex >= hdr->sh_size)
294 (*_bfd_error_handler)
295 (_("%s: invalid string offset %u >= %lu for section `%s'"),
296 bfd_archive_filename (abfd), strindex, (unsigned long) hdr->sh_size,
297 ((shindex == elf_elfheader(abfd)->e_shstrndx
298 && strindex == hdr->sh_name)
300 : elf_string_from_elf_strtab (abfd, hdr->sh_name)));
304 return ((char *) hdr->contents) + strindex;
307 /* Read and convert symbols to internal format.
308 SYMCOUNT specifies the number of symbols to read, starting from
309 symbol SYMOFFSET. If any of INTSYM_BUF, EXTSYM_BUF or EXTSHNDX_BUF
310 are non-NULL, they are used to store the internal symbols, external
311 symbols, and symbol section index extensions, respectively. */
314 bfd_elf_get_elf_syms (bfd *ibfd,
315 Elf_Internal_Shdr *symtab_hdr,
318 Elf_Internal_Sym *intsym_buf,
320 Elf_External_Sym_Shndx *extshndx_buf)
322 Elf_Internal_Shdr *shndx_hdr;
324 const bfd_byte *esym;
325 Elf_External_Sym_Shndx *alloc_extshndx;
326 Elf_External_Sym_Shndx *shndx;
327 Elf_Internal_Sym *isym;
328 Elf_Internal_Sym *isymend;
329 const struct elf_backend_data *bed;
337 /* Normal syms might have section extension entries. */
339 if (symtab_hdr == &elf_tdata (ibfd)->symtab_hdr)
340 shndx_hdr = &elf_tdata (ibfd)->symtab_shndx_hdr;
342 /* Read the symbols. */
344 alloc_extshndx = NULL;
345 bed = get_elf_backend_data (ibfd);
346 extsym_size = bed->s->sizeof_sym;
347 amt = symcount * extsym_size;
348 pos = symtab_hdr->sh_offset + symoffset * extsym_size;
349 if (extsym_buf == NULL)
351 alloc_ext = bfd_malloc (amt);
352 extsym_buf = alloc_ext;
354 if (extsym_buf == NULL
355 || bfd_seek (ibfd, pos, SEEK_SET) != 0
356 || bfd_bread (extsym_buf, amt, ibfd) != amt)
362 if (shndx_hdr == NULL || shndx_hdr->sh_size == 0)
366 amt = symcount * sizeof (Elf_External_Sym_Shndx);
367 pos = shndx_hdr->sh_offset + symoffset * sizeof (Elf_External_Sym_Shndx);
368 if (extshndx_buf == NULL)
370 alloc_extshndx = bfd_malloc (amt);
371 extshndx_buf = alloc_extshndx;
373 if (extshndx_buf == NULL
374 || bfd_seek (ibfd, pos, SEEK_SET) != 0
375 || bfd_bread (extshndx_buf, amt, ibfd) != amt)
382 if (intsym_buf == NULL)
384 bfd_size_type amt = symcount * sizeof (Elf_Internal_Sym);
385 intsym_buf = bfd_malloc (amt);
386 if (intsym_buf == NULL)
390 /* Convert the symbols to internal form. */
391 isymend = intsym_buf + symcount;
392 for (esym = extsym_buf, isym = intsym_buf, shndx = extshndx_buf;
394 esym += extsym_size, isym++, shndx = shndx != NULL ? shndx + 1 : NULL)
395 (*bed->s->swap_symbol_in) (ibfd, esym, shndx, isym);
398 if (alloc_ext != NULL)
400 if (alloc_extshndx != NULL)
401 free (alloc_extshndx);
406 /* Look up a symbol name. */
408 bfd_elf_local_sym_name (bfd *abfd, Elf_Internal_Sym *isym)
410 unsigned int iname = isym->st_name;
411 unsigned int shindex = elf_tdata (abfd)->symtab_hdr.sh_link;
412 if (iname == 0 && ELF_ST_TYPE (isym->st_info) == STT_SECTION)
414 iname = elf_elfsections (abfd)[isym->st_shndx]->sh_name;
415 shindex = elf_elfheader (abfd)->e_shstrndx;
418 return bfd_elf_string_from_elf_section (abfd, shindex, iname);
421 /* Elf_Internal_Shdr->contents is an array of these for SHT_GROUP
422 sections. The first element is the flags, the rest are section
425 typedef union elf_internal_group {
426 Elf_Internal_Shdr *shdr;
428 } Elf_Internal_Group;
430 /* Return the name of the group signature symbol. Why isn't the
431 signature just a string? */
434 group_signature (bfd *abfd, Elf_Internal_Shdr *ghdr)
436 Elf_Internal_Shdr *hdr;
437 unsigned char esym[sizeof (Elf64_External_Sym)];
438 Elf_External_Sym_Shndx eshndx;
439 Elf_Internal_Sym isym;
441 /* First we need to ensure the symbol table is available. */
442 if (! bfd_section_from_shdr (abfd, ghdr->sh_link))
445 /* Go read the symbol. */
446 hdr = &elf_tdata (abfd)->symtab_hdr;
447 if (bfd_elf_get_elf_syms (abfd, hdr, 1, ghdr->sh_info,
448 &isym, esym, &eshndx) == NULL)
451 return bfd_elf_local_sym_name (abfd, &isym);
454 /* Set next_in_group list pointer, and group name for NEWSECT. */
457 setup_group (bfd *abfd, Elf_Internal_Shdr *hdr, asection *newsect)
459 unsigned int num_group = elf_tdata (abfd)->num_group;
461 /* If num_group is zero, read in all SHT_GROUP sections. The count
462 is set to -1 if there are no SHT_GROUP sections. */
465 unsigned int i, shnum;
467 /* First count the number of groups. If we have a SHT_GROUP
468 section with just a flag word (ie. sh_size is 4), ignore it. */
469 shnum = elf_numsections (abfd);
471 for (i = 0; i < shnum; i++)
473 Elf_Internal_Shdr *shdr = elf_elfsections (abfd)[i];
474 if (shdr->sh_type == SHT_GROUP && shdr->sh_size >= 8)
479 num_group = (unsigned) -1;
480 elf_tdata (abfd)->num_group = num_group;
484 /* We keep a list of elf section headers for group sections,
485 so we can find them quickly. */
486 bfd_size_type amt = num_group * sizeof (Elf_Internal_Shdr *);
487 elf_tdata (abfd)->group_sect_ptr = bfd_alloc (abfd, amt);
488 if (elf_tdata (abfd)->group_sect_ptr == NULL)
492 for (i = 0; i < shnum; i++)
494 Elf_Internal_Shdr *shdr = elf_elfsections (abfd)[i];
495 if (shdr->sh_type == SHT_GROUP && shdr->sh_size >= 8)
498 Elf_Internal_Group *dest;
500 /* Add to list of sections. */
501 elf_tdata (abfd)->group_sect_ptr[num_group] = shdr;
504 /* Read the raw contents. */
505 BFD_ASSERT (sizeof (*dest) >= 4);
506 amt = shdr->sh_size * sizeof (*dest) / 4;
507 shdr->contents = bfd_alloc (abfd, amt);
508 if (shdr->contents == NULL
509 || bfd_seek (abfd, shdr->sh_offset, SEEK_SET) != 0
510 || (bfd_bread (shdr->contents, shdr->sh_size, abfd)
514 /* Translate raw contents, a flag word followed by an
515 array of elf section indices all in target byte order,
516 to the flag word followed by an array of elf section
518 src = shdr->contents + shdr->sh_size;
519 dest = (Elf_Internal_Group *) (shdr->contents + amt);
526 idx = H_GET_32 (abfd, src);
527 if (src == shdr->contents)
530 if (shdr->bfd_section != NULL && (idx & GRP_COMDAT))
531 shdr->bfd_section->flags
532 |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
537 ((*_bfd_error_handler)
538 (_("%s: invalid SHT_GROUP entry"),
539 bfd_archive_filename (abfd)));
542 dest->shdr = elf_elfsections (abfd)[idx];
549 if (num_group != (unsigned) -1)
553 for (i = 0; i < num_group; i++)
555 Elf_Internal_Shdr *shdr = elf_tdata (abfd)->group_sect_ptr[i];
556 Elf_Internal_Group *idx = (Elf_Internal_Group *) shdr->contents;
557 unsigned int n_elt = shdr->sh_size / 4;
559 /* Look through this group's sections to see if current
560 section is a member. */
562 if ((++idx)->shdr == hdr)
566 /* We are a member of this group. Go looking through
567 other members to see if any others are linked via
569 idx = (Elf_Internal_Group *) shdr->contents;
570 n_elt = shdr->sh_size / 4;
572 if ((s = (++idx)->shdr->bfd_section) != NULL
573 && elf_next_in_group (s) != NULL)
577 /* Snarf the group name from other member, and
578 insert current section in circular list. */
579 elf_group_name (newsect) = elf_group_name (s);
580 elf_next_in_group (newsect) = elf_next_in_group (s);
581 elf_next_in_group (s) = newsect;
587 gname = group_signature (abfd, shdr);
590 elf_group_name (newsect) = gname;
592 /* Start a circular list with one element. */
593 elf_next_in_group (newsect) = newsect;
596 /* If the group section has been created, point to the
598 if (shdr->bfd_section != NULL)
599 elf_next_in_group (shdr->bfd_section) = newsect;
607 if (elf_group_name (newsect) == NULL)
609 (*_bfd_error_handler) (_("%s: no group info for section %s"),
610 bfd_archive_filename (abfd), newsect->name);
616 bfd_elf_discard_group (bfd *abfd ATTRIBUTE_UNUSED, asection *group)
618 asection *first = elf_next_in_group (group);
623 s->output_section = bfd_abs_section_ptr;
624 s = elf_next_in_group (s);
625 /* These lists are circular. */
632 /* Make a BFD section from an ELF section. We store a pointer to the
633 BFD section in the bfd_section field of the header. */
636 _bfd_elf_make_section_from_shdr (bfd *abfd,
637 Elf_Internal_Shdr *hdr,
642 const struct elf_backend_data *bed;
644 if (hdr->bfd_section != NULL)
646 BFD_ASSERT (strcmp (name,
647 bfd_get_section_name (abfd, hdr->bfd_section)) == 0);
651 newsect = bfd_make_section_anyway (abfd, name);
655 /* Always use the real type/flags. */
656 elf_section_type (newsect) = hdr->sh_type;
657 elf_section_flags (newsect) = hdr->sh_flags;
659 newsect->filepos = hdr->sh_offset;
661 if (! bfd_set_section_vma (abfd, newsect, hdr->sh_addr)
662 || ! bfd_set_section_size (abfd, newsect, hdr->sh_size)
663 || ! bfd_set_section_alignment (abfd, newsect,
664 bfd_log2 ((bfd_vma) hdr->sh_addralign)))
667 flags = SEC_NO_FLAGS;
668 if (hdr->sh_type != SHT_NOBITS)
669 flags |= SEC_HAS_CONTENTS;
670 if (hdr->sh_type == SHT_GROUP)
671 flags |= SEC_GROUP | SEC_EXCLUDE;
672 if ((hdr->sh_flags & SHF_ALLOC) != 0)
675 if (hdr->sh_type != SHT_NOBITS)
678 if ((hdr->sh_flags & SHF_WRITE) == 0)
679 flags |= SEC_READONLY;
680 if ((hdr->sh_flags & SHF_EXECINSTR) != 0)
682 else if ((flags & SEC_LOAD) != 0)
684 if ((hdr->sh_flags & SHF_MERGE) != 0)
687 newsect->entsize = hdr->sh_entsize;
688 if ((hdr->sh_flags & SHF_STRINGS) != 0)
689 flags |= SEC_STRINGS;
691 if (hdr->sh_flags & SHF_GROUP)
692 if (!setup_group (abfd, hdr, newsect))
694 if ((hdr->sh_flags & SHF_TLS) != 0)
695 flags |= SEC_THREAD_LOCAL;
697 /* The debugging sections appear to be recognized only by name, not
700 static const char *debug_sec_names [] =
709 for (i = ARRAY_SIZE (debug_sec_names); i--;)
710 if (strncmp (name, debug_sec_names[i], strlen (debug_sec_names[i])) == 0)
714 flags |= SEC_DEBUGGING;
717 /* As a GNU extension, if the name begins with .gnu.linkonce, we
718 only link a single copy of the section. This is used to support
719 g++. g++ will emit each template expansion in its own section.
720 The symbols will be defined as weak, so that multiple definitions
721 are permitted. The GNU linker extension is to actually discard
722 all but one of the sections. */
723 if (strncmp (name, ".gnu.linkonce", sizeof ".gnu.linkonce" - 1) == 0
724 && elf_next_in_group (newsect) == NULL)
725 flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
727 bed = get_elf_backend_data (abfd);
728 if (bed->elf_backend_section_flags)
729 if (! bed->elf_backend_section_flags (&flags, hdr))
732 if (! bfd_set_section_flags (abfd, newsect, flags))
735 if ((flags & SEC_ALLOC) != 0)
737 Elf_Internal_Phdr *phdr;
740 /* Look through the phdrs to see if we need to adjust the lma.
741 If all the p_paddr fields are zero, we ignore them, since
742 some ELF linkers produce such output. */
743 phdr = elf_tdata (abfd)->phdr;
744 for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
746 if (phdr->p_paddr != 0)
749 if (i < elf_elfheader (abfd)->e_phnum)
751 phdr = elf_tdata (abfd)->phdr;
752 for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
754 /* This section is part of this segment if its file
755 offset plus size lies within the segment's memory
756 span and, if the section is loaded, the extent of the
757 loaded data lies within the extent of the segment.
759 Note - we used to check the p_paddr field as well, and
760 refuse to set the LMA if it was 0. This is wrong
761 though, as a perfectly valid initialised segment can
762 have a p_paddr of zero. Some architectures, eg ARM,
763 place special significance on the address 0 and
764 executables need to be able to have a segment which
765 covers this address. */
766 if (phdr->p_type == PT_LOAD
767 && (bfd_vma) hdr->sh_offset >= phdr->p_offset
768 && (hdr->sh_offset + hdr->sh_size
769 <= phdr->p_offset + phdr->p_memsz)
770 && ((flags & SEC_LOAD) == 0
771 || (hdr->sh_offset + hdr->sh_size
772 <= phdr->p_offset + phdr->p_filesz)))
774 if ((flags & SEC_LOAD) == 0)
775 newsect->lma = (phdr->p_paddr
776 + hdr->sh_addr - phdr->p_vaddr);
778 /* We used to use the same adjustment for SEC_LOAD
779 sections, but that doesn't work if the segment
780 is packed with code from multiple VMAs.
781 Instead we calculate the section LMA based on
782 the segment LMA. It is assumed that the
783 segment will contain sections with contiguous
784 LMAs, even if the VMAs are not. */
785 newsect->lma = (phdr->p_paddr
786 + hdr->sh_offset - phdr->p_offset);
788 /* With contiguous segments, we can't tell from file
789 offsets whether a section with zero size should
790 be placed at the end of one segment or the
791 beginning of the next. Decide based on vaddr. */
792 if (hdr->sh_addr >= phdr->p_vaddr
793 && (hdr->sh_addr + hdr->sh_size
794 <= phdr->p_vaddr + phdr->p_memsz))
801 hdr->bfd_section = newsect;
802 elf_section_data (newsect)->this_hdr = *hdr;
812 struct elf_internal_shdr *bfd_elf_find_section (bfd *abfd, char *name);
815 Helper functions for GDB to locate the string tables.
816 Since BFD hides string tables from callers, GDB needs to use an
817 internal hook to find them. Sun's .stabstr, in particular,
818 isn't even pointed to by the .stab section, so ordinary
819 mechanisms wouldn't work to find it, even if we had some.
822 struct elf_internal_shdr *
823 bfd_elf_find_section (bfd *abfd, char *name)
825 Elf_Internal_Shdr **i_shdrp;
830 i_shdrp = elf_elfsections (abfd);
833 shstrtab = bfd_elf_get_str_section (abfd,
834 elf_elfheader (abfd)->e_shstrndx);
835 if (shstrtab != NULL)
837 max = elf_numsections (abfd);
838 for (i = 1; i < max; i++)
839 if (!strcmp (&shstrtab[i_shdrp[i]->sh_name], name))
846 const char *const bfd_elf_section_type_names[] = {
847 "SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB",
848 "SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE",
849 "SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM",
852 /* ELF relocs are against symbols. If we are producing relocatable
853 output, and the reloc is against an external symbol, and nothing
854 has given us any additional addend, the resulting reloc will also
855 be against the same symbol. In such a case, we don't want to
856 change anything about the way the reloc is handled, since it will
857 all be done at final link time. Rather than put special case code
858 into bfd_perform_relocation, all the reloc types use this howto
859 function. It just short circuits the reloc if producing
860 relocatable output against an external symbol. */
862 bfd_reloc_status_type
863 bfd_elf_generic_reloc (bfd *abfd ATTRIBUTE_UNUSED,
864 arelent *reloc_entry,
866 void *data ATTRIBUTE_UNUSED,
867 asection *input_section,
869 char **error_message ATTRIBUTE_UNUSED)
871 if (output_bfd != NULL
872 && (symbol->flags & BSF_SECTION_SYM) == 0
873 && (! reloc_entry->howto->partial_inplace
874 || reloc_entry->addend == 0))
876 reloc_entry->address += input_section->output_offset;
880 return bfd_reloc_continue;
883 /* Make sure sec_info_type is cleared if sec_info is cleared too. */
886 merge_sections_remove_hook (bfd *abfd ATTRIBUTE_UNUSED,
889 BFD_ASSERT (sec->sec_info_type == ELF_INFO_TYPE_MERGE);
890 sec->sec_info_type = ELF_INFO_TYPE_NONE;
893 /* Finish SHF_MERGE section merging. */
896 _bfd_elf_merge_sections (bfd *abfd, struct bfd_link_info *info)
898 if (!is_elf_hash_table (info->hash))
900 if (elf_hash_table (info)->merge_info)
901 _bfd_merge_sections (abfd, elf_hash_table (info)->merge_info,
902 merge_sections_remove_hook);
907 _bfd_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
909 sec->output_section = bfd_abs_section_ptr;
910 sec->output_offset = sec->vma;
911 if (!is_elf_hash_table (info->hash))
914 sec->sec_info_type = ELF_INFO_TYPE_JUST_SYMS;
917 /* Copy the program header and other data from one object module to
921 _bfd_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
923 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
924 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
927 BFD_ASSERT (!elf_flags_init (obfd)
928 || (elf_elfheader (obfd)->e_flags
929 == elf_elfheader (ibfd)->e_flags));
931 elf_gp (obfd) = elf_gp (ibfd);
932 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
933 elf_flags_init (obfd) = TRUE;
937 /* Print out the program headers. */
940 _bfd_elf_print_private_bfd_data (bfd *abfd, void *farg)
943 Elf_Internal_Phdr *p;
945 bfd_byte *dynbuf = NULL;
947 p = elf_tdata (abfd)->phdr;
952 fprintf (f, _("\nProgram Header:\n"));
953 c = elf_elfheader (abfd)->e_phnum;
954 for (i = 0; i < c; i++, p++)
961 case PT_NULL: pt = "NULL"; break;
962 case PT_LOAD: pt = "LOAD"; break;
963 case PT_DYNAMIC: pt = "DYNAMIC"; break;
964 case PT_INTERP: pt = "INTERP"; break;
965 case PT_NOTE: pt = "NOTE"; break;
966 case PT_SHLIB: pt = "SHLIB"; break;
967 case PT_PHDR: pt = "PHDR"; break;
968 case PT_TLS: pt = "TLS"; break;
969 case PT_GNU_EH_FRAME: pt = "EH_FRAME"; break;
970 case PT_GNU_STACK: pt = "STACK"; break;
971 default: sprintf (buf, "0x%lx", p->p_type); pt = buf; break;
973 fprintf (f, "%8s off 0x", pt);
974 bfd_fprintf_vma (abfd, f, p->p_offset);
975 fprintf (f, " vaddr 0x");
976 bfd_fprintf_vma (abfd, f, p->p_vaddr);
977 fprintf (f, " paddr 0x");
978 bfd_fprintf_vma (abfd, f, p->p_paddr);
979 fprintf (f, " align 2**%u\n", bfd_log2 (p->p_align));
980 fprintf (f, " filesz 0x");
981 bfd_fprintf_vma (abfd, f, p->p_filesz);
982 fprintf (f, " memsz 0x");
983 bfd_fprintf_vma (abfd, f, p->p_memsz);
984 fprintf (f, " flags %c%c%c",
985 (p->p_flags & PF_R) != 0 ? 'r' : '-',
986 (p->p_flags & PF_W) != 0 ? 'w' : '-',
987 (p->p_flags & PF_X) != 0 ? 'x' : '-');
988 if ((p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X)) != 0)
989 fprintf (f, " %lx", p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X));
994 s = bfd_get_section_by_name (abfd, ".dynamic");
998 unsigned long shlink;
999 bfd_byte *extdyn, *extdynend;
1001 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
1003 fprintf (f, _("\nDynamic Section:\n"));
1005 dynbuf = bfd_malloc (s->_raw_size);
1008 if (! bfd_get_section_contents (abfd, s, dynbuf, 0, s->_raw_size))
1011 elfsec = _bfd_elf_section_from_bfd_section (abfd, s);
1014 shlink = elf_elfsections (abfd)[elfsec]->sh_link;
1016 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
1017 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
1020 extdynend = extdyn + s->_raw_size;
1021 for (; extdyn < extdynend; extdyn += extdynsize)
1023 Elf_Internal_Dyn dyn;
1026 bfd_boolean stringp;
1028 (*swap_dyn_in) (abfd, extdyn, &dyn);
1030 if (dyn.d_tag == DT_NULL)
1037 sprintf (ab, "0x%lx", (unsigned long) dyn.d_tag);
1041 case DT_NEEDED: name = "NEEDED"; stringp = TRUE; break;
1042 case DT_PLTRELSZ: name = "PLTRELSZ"; break;
1043 case DT_PLTGOT: name = "PLTGOT"; break;
1044 case DT_HASH: name = "HASH"; break;
1045 case DT_STRTAB: name = "STRTAB"; break;
1046 case DT_SYMTAB: name = "SYMTAB"; break;
1047 case DT_RELA: name = "RELA"; break;
1048 case DT_RELASZ: name = "RELASZ"; break;
1049 case DT_RELAENT: name = "RELAENT"; break;
1050 case DT_STRSZ: name = "STRSZ"; break;
1051 case DT_SYMENT: name = "SYMENT"; break;
1052 case DT_INIT: name = "INIT"; break;
1053 case DT_FINI: name = "FINI"; break;
1054 case DT_SONAME: name = "SONAME"; stringp = TRUE; break;
1055 case DT_RPATH: name = "RPATH"; stringp = TRUE; break;
1056 case DT_SYMBOLIC: name = "SYMBOLIC"; break;
1057 case DT_REL: name = "REL"; break;
1058 case DT_RELSZ: name = "RELSZ"; break;
1059 case DT_RELENT: name = "RELENT"; break;
1060 case DT_PLTREL: name = "PLTREL"; break;
1061 case DT_DEBUG: name = "DEBUG"; break;
1062 case DT_TEXTREL: name = "TEXTREL"; break;
1063 case DT_JMPREL: name = "JMPREL"; break;
1064 case DT_BIND_NOW: name = "BIND_NOW"; break;
1065 case DT_INIT_ARRAY: name = "INIT_ARRAY"; break;
1066 case DT_FINI_ARRAY: name = "FINI_ARRAY"; break;
1067 case DT_INIT_ARRAYSZ: name = "INIT_ARRAYSZ"; break;
1068 case DT_FINI_ARRAYSZ: name = "FINI_ARRAYSZ"; break;
1069 case DT_RUNPATH: name = "RUNPATH"; stringp = TRUE; break;
1070 case DT_FLAGS: name = "FLAGS"; break;
1071 case DT_PREINIT_ARRAY: name = "PREINIT_ARRAY"; break;
1072 case DT_PREINIT_ARRAYSZ: name = "PREINIT_ARRAYSZ"; break;
1073 case DT_CHECKSUM: name = "CHECKSUM"; break;
1074 case DT_PLTPADSZ: name = "PLTPADSZ"; break;
1075 case DT_MOVEENT: name = "MOVEENT"; break;
1076 case DT_MOVESZ: name = "MOVESZ"; break;
1077 case DT_FEATURE: name = "FEATURE"; break;
1078 case DT_POSFLAG_1: name = "POSFLAG_1"; break;
1079 case DT_SYMINSZ: name = "SYMINSZ"; break;
1080 case DT_SYMINENT: name = "SYMINENT"; break;
1081 case DT_CONFIG: name = "CONFIG"; stringp = TRUE; break;
1082 case DT_DEPAUDIT: name = "DEPAUDIT"; stringp = TRUE; break;
1083 case DT_AUDIT: name = "AUDIT"; stringp = TRUE; break;
1084 case DT_PLTPAD: name = "PLTPAD"; break;
1085 case DT_MOVETAB: name = "MOVETAB"; break;
1086 case DT_SYMINFO: name = "SYMINFO"; break;
1087 case DT_RELACOUNT: name = "RELACOUNT"; break;
1088 case DT_RELCOUNT: name = "RELCOUNT"; break;
1089 case DT_FLAGS_1: name = "FLAGS_1"; break;
1090 case DT_VERSYM: name = "VERSYM"; break;
1091 case DT_VERDEF: name = "VERDEF"; break;
1092 case DT_VERDEFNUM: name = "VERDEFNUM"; break;
1093 case DT_VERNEED: name = "VERNEED"; break;
1094 case DT_VERNEEDNUM: name = "VERNEEDNUM"; break;
1095 case DT_AUXILIARY: name = "AUXILIARY"; stringp = TRUE; break;
1096 case DT_USED: name = "USED"; break;
1097 case DT_FILTER: name = "FILTER"; stringp = TRUE; break;
1100 fprintf (f, " %-11s ", name);
1102 fprintf (f, "0x%lx", (unsigned long) dyn.d_un.d_val);
1106 unsigned int tagv = dyn.d_un.d_val;
1108 string = bfd_elf_string_from_elf_section (abfd, shlink, tagv);
1111 fprintf (f, "%s", string);
1120 if ((elf_dynverdef (abfd) != 0 && elf_tdata (abfd)->verdef == NULL)
1121 || (elf_dynverref (abfd) != 0 && elf_tdata (abfd)->verref == NULL))
1123 if (! _bfd_elf_slurp_version_tables (abfd))
1127 if (elf_dynverdef (abfd) != 0)
1129 Elf_Internal_Verdef *t;
1131 fprintf (f, _("\nVersion definitions:\n"));
1132 for (t = elf_tdata (abfd)->verdef; t != NULL; t = t->vd_nextdef)
1134 fprintf (f, "%d 0x%2.2x 0x%8.8lx %s\n", t->vd_ndx,
1135 t->vd_flags, t->vd_hash, t->vd_nodename);
1136 if (t->vd_auxptr->vda_nextptr != NULL)
1138 Elf_Internal_Verdaux *a;
1141 for (a = t->vd_auxptr->vda_nextptr;
1144 fprintf (f, "%s ", a->vda_nodename);
1150 if (elf_dynverref (abfd) != 0)
1152 Elf_Internal_Verneed *t;
1154 fprintf (f, _("\nVersion References:\n"));
1155 for (t = elf_tdata (abfd)->verref; t != NULL; t = t->vn_nextref)
1157 Elf_Internal_Vernaux *a;
1159 fprintf (f, _(" required from %s:\n"), t->vn_filename);
1160 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
1161 fprintf (f, " 0x%8.8lx 0x%2.2x %2.2d %s\n", a->vna_hash,
1162 a->vna_flags, a->vna_other, a->vna_nodename);
1174 /* Display ELF-specific fields of a symbol. */
1177 bfd_elf_print_symbol (bfd *abfd,
1180 bfd_print_symbol_type how)
1185 case bfd_print_symbol_name:
1186 fprintf (file, "%s", symbol->name);
1188 case bfd_print_symbol_more:
1189 fprintf (file, "elf ");
1190 bfd_fprintf_vma (abfd, file, symbol->value);
1191 fprintf (file, " %lx", (long) symbol->flags);
1193 case bfd_print_symbol_all:
1195 const char *section_name;
1196 const char *name = NULL;
1197 const struct elf_backend_data *bed;
1198 unsigned char st_other;
1201 section_name = symbol->section ? symbol->section->name : "(*none*)";
1203 bed = get_elf_backend_data (abfd);
1204 if (bed->elf_backend_print_symbol_all)
1205 name = (*bed->elf_backend_print_symbol_all) (abfd, filep, symbol);
1209 name = symbol->name;
1210 bfd_print_symbol_vandf (abfd, file, symbol);
1213 fprintf (file, " %s\t", section_name);
1214 /* Print the "other" value for a symbol. For common symbols,
1215 we've already printed the size; now print the alignment.
1216 For other symbols, we have no specified alignment, and
1217 we've printed the address; now print the size. */
1218 if (bfd_is_com_section (symbol->section))
1219 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_value;
1221 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_size;
1222 bfd_fprintf_vma (abfd, file, val);
1224 /* If we have version information, print it. */
1225 if (elf_tdata (abfd)->dynversym_section != 0
1226 && (elf_tdata (abfd)->dynverdef_section != 0
1227 || elf_tdata (abfd)->dynverref_section != 0))
1229 unsigned int vernum;
1230 const char *version_string;
1232 vernum = ((elf_symbol_type *) symbol)->version & VERSYM_VERSION;
1235 version_string = "";
1236 else if (vernum == 1)
1237 version_string = "Base";
1238 else if (vernum <= elf_tdata (abfd)->cverdefs)
1240 elf_tdata (abfd)->verdef[vernum - 1].vd_nodename;
1243 Elf_Internal_Verneed *t;
1245 version_string = "";
1246 for (t = elf_tdata (abfd)->verref;
1250 Elf_Internal_Vernaux *a;
1252 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
1254 if (a->vna_other == vernum)
1256 version_string = a->vna_nodename;
1263 if ((((elf_symbol_type *) symbol)->version & VERSYM_HIDDEN) == 0)
1264 fprintf (file, " %-11s", version_string);
1269 fprintf (file, " (%s)", version_string);
1270 for (i = 10 - strlen (version_string); i > 0; --i)
1275 /* If the st_other field is not zero, print it. */
1276 st_other = ((elf_symbol_type *) symbol)->internal_elf_sym.st_other;
1281 case STV_INTERNAL: fprintf (file, " .internal"); break;
1282 case STV_HIDDEN: fprintf (file, " .hidden"); break;
1283 case STV_PROTECTED: fprintf (file, " .protected"); break;
1285 /* Some other non-defined flags are also present, so print
1287 fprintf (file, " 0x%02x", (unsigned int) st_other);
1290 fprintf (file, " %s", name);
1296 /* Create an entry in an ELF linker hash table. */
1298 struct bfd_hash_entry *
1299 _bfd_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
1300 struct bfd_hash_table *table,
1303 /* Allocate the structure if it has not already been allocated by a
1307 entry = bfd_hash_allocate (table, sizeof (struct elf_link_hash_entry));
1312 /* Call the allocation method of the superclass. */
1313 entry = _bfd_link_hash_newfunc (entry, table, string);
1316 struct elf_link_hash_entry *ret = (struct elf_link_hash_entry *) entry;
1317 struct elf_link_hash_table *htab = (struct elf_link_hash_table *) table;
1319 /* Set local fields. */
1322 ret->dynstr_index = 0;
1323 ret->elf_hash_value = 0;
1324 ret->weakdef = NULL;
1325 ret->verinfo.verdef = NULL;
1326 ret->vtable_entries_size = 0;
1327 ret->vtable_entries_used = NULL;
1328 ret->vtable_parent = NULL;
1329 ret->got = htab->init_refcount;
1330 ret->plt = htab->init_refcount;
1332 ret->type = STT_NOTYPE;
1334 /* Assume that we have been called by a non-ELF symbol reader.
1335 This flag is then reset by the code which reads an ELF input
1336 file. This ensures that a symbol created by a non-ELF symbol
1337 reader will have the flag set correctly. */
1338 ret->elf_link_hash_flags = ELF_LINK_NON_ELF;
1344 /* Copy data from an indirect symbol to its direct symbol, hiding the
1345 old indirect symbol. Also used for copying flags to a weakdef. */
1348 _bfd_elf_link_hash_copy_indirect (const struct elf_backend_data *bed,
1349 struct elf_link_hash_entry *dir,
1350 struct elf_link_hash_entry *ind)
1353 bfd_signed_vma lowest_valid = bed->can_refcount;
1355 /* Copy down any references that we may have already seen to the
1356 symbol which just became indirect. */
1358 dir->elf_link_hash_flags
1359 |= ind->elf_link_hash_flags & (ELF_LINK_HASH_REF_DYNAMIC
1360 | ELF_LINK_HASH_REF_REGULAR
1361 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
1362 | ELF_LINK_NON_GOT_REF
1363 | ELF_LINK_HASH_NEEDS_PLT
1364 | ELF_LINK_POINTER_EQUALITY_NEEDED);
1366 if (ind->root.type != bfd_link_hash_indirect)
1369 /* Copy over the global and procedure linkage table refcount entries.
1370 These may have been already set up by a check_relocs routine. */
1371 tmp = dir->got.refcount;
1372 if (tmp < lowest_valid)
1374 dir->got.refcount = ind->got.refcount;
1375 ind->got.refcount = tmp;
1378 BFD_ASSERT (ind->got.refcount < lowest_valid);
1380 tmp = dir->plt.refcount;
1381 if (tmp < lowest_valid)
1383 dir->plt.refcount = ind->plt.refcount;
1384 ind->plt.refcount = tmp;
1387 BFD_ASSERT (ind->plt.refcount < lowest_valid);
1389 if (dir->dynindx == -1)
1391 dir->dynindx = ind->dynindx;
1392 dir->dynstr_index = ind->dynstr_index;
1394 ind->dynstr_index = 0;
1397 BFD_ASSERT (ind->dynindx == -1);
1401 _bfd_elf_link_hash_hide_symbol (struct bfd_link_info *info,
1402 struct elf_link_hash_entry *h,
1403 bfd_boolean force_local)
1405 h->plt = elf_hash_table (info)->init_offset;
1406 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
1409 h->elf_link_hash_flags |= ELF_LINK_FORCED_LOCAL;
1410 if (h->dynindx != -1)
1413 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
1419 /* Initialize an ELF linker hash table. */
1422 _bfd_elf_link_hash_table_init
1423 (struct elf_link_hash_table *table,
1425 struct bfd_hash_entry *(*newfunc) (struct bfd_hash_entry *,
1426 struct bfd_hash_table *,
1431 table->dynamic_sections_created = FALSE;
1432 table->dynobj = NULL;
1433 /* Make sure can_refcount is extended to the width and signedness of
1434 init_refcount before we subtract one from it. */
1435 table->init_refcount.refcount = get_elf_backend_data (abfd)->can_refcount;
1436 table->init_refcount.refcount -= 1;
1437 table->init_offset.offset = -(bfd_vma) 1;
1438 /* The first dynamic symbol is a dummy. */
1439 table->dynsymcount = 1;
1440 table->dynstr = NULL;
1441 table->bucketcount = 0;
1442 table->needed = NULL;
1444 table->stab_info = NULL;
1445 table->merge_info = NULL;
1446 memset (&table->eh_info, 0, sizeof (table->eh_info));
1447 table->dynlocal = NULL;
1448 table->runpath = NULL;
1449 table->tls_sec = NULL;
1450 table->tls_size = 0;
1451 table->loaded = NULL;
1453 ret = _bfd_link_hash_table_init (&table->root, abfd, newfunc);
1454 table->root.type = bfd_link_elf_hash_table;
1459 /* Create an ELF linker hash table. */
1461 struct bfd_link_hash_table *
1462 _bfd_elf_link_hash_table_create (bfd *abfd)
1464 struct elf_link_hash_table *ret;
1465 bfd_size_type amt = sizeof (struct elf_link_hash_table);
1467 ret = bfd_malloc (amt);
1471 if (! _bfd_elf_link_hash_table_init (ret, abfd, _bfd_elf_link_hash_newfunc))
1480 /* This is a hook for the ELF emulation code in the generic linker to
1481 tell the backend linker what file name to use for the DT_NEEDED
1482 entry for a dynamic object. */
1485 bfd_elf_set_dt_needed_name (bfd *abfd, const char *name)
1487 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
1488 && bfd_get_format (abfd) == bfd_object)
1489 elf_dt_name (abfd) = name;
1493 bfd_elf_set_dyn_lib_class (bfd *abfd, int lib_class)
1495 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
1496 && bfd_get_format (abfd) == bfd_object)
1497 elf_dyn_lib_class (abfd) = lib_class;
1500 /* Get the list of DT_NEEDED entries for a link. This is a hook for
1501 the linker ELF emulation code. */
1503 struct bfd_link_needed_list *
1504 bfd_elf_get_needed_list (bfd *abfd ATTRIBUTE_UNUSED,
1505 struct bfd_link_info *info)
1507 if (! is_elf_hash_table (info->hash))
1509 return elf_hash_table (info)->needed;
1512 /* Get the list of DT_RPATH/DT_RUNPATH entries for a link. This is a
1513 hook for the linker ELF emulation code. */
1515 struct bfd_link_needed_list *
1516 bfd_elf_get_runpath_list (bfd *abfd ATTRIBUTE_UNUSED,
1517 struct bfd_link_info *info)
1519 if (! is_elf_hash_table (info->hash))
1521 return elf_hash_table (info)->runpath;
1524 /* Get the name actually used for a dynamic object for a link. This
1525 is the SONAME entry if there is one. Otherwise, it is the string
1526 passed to bfd_elf_set_dt_needed_name, or it is the filename. */
1529 bfd_elf_get_dt_soname (bfd *abfd)
1531 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
1532 && bfd_get_format (abfd) == bfd_object)
1533 return elf_dt_name (abfd);
1537 /* Get the list of DT_NEEDED entries from a BFD. This is a hook for
1538 the ELF linker emulation code. */
1541 bfd_elf_get_bfd_needed_list (bfd *abfd,
1542 struct bfd_link_needed_list **pneeded)
1545 bfd_byte *dynbuf = NULL;
1547 unsigned long shlink;
1548 bfd_byte *extdyn, *extdynend;
1550 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
1554 if (bfd_get_flavour (abfd) != bfd_target_elf_flavour
1555 || bfd_get_format (abfd) != bfd_object)
1558 s = bfd_get_section_by_name (abfd, ".dynamic");
1559 if (s == NULL || s->_raw_size == 0)
1562 dynbuf = bfd_malloc (s->_raw_size);
1566 if (! bfd_get_section_contents (abfd, s, dynbuf, 0, s->_raw_size))
1569 elfsec = _bfd_elf_section_from_bfd_section (abfd, s);
1573 shlink = elf_elfsections (abfd)[elfsec]->sh_link;
1575 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
1576 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
1579 extdynend = extdyn + s->_raw_size;
1580 for (; extdyn < extdynend; extdyn += extdynsize)
1582 Elf_Internal_Dyn dyn;
1584 (*swap_dyn_in) (abfd, extdyn, &dyn);
1586 if (dyn.d_tag == DT_NULL)
1589 if (dyn.d_tag == DT_NEEDED)
1592 struct bfd_link_needed_list *l;
1593 unsigned int tagv = dyn.d_un.d_val;
1596 string = bfd_elf_string_from_elf_section (abfd, shlink, tagv);
1601 l = bfd_alloc (abfd, amt);
1622 /* Allocate an ELF string table--force the first byte to be zero. */
1624 struct bfd_strtab_hash *
1625 _bfd_elf_stringtab_init (void)
1627 struct bfd_strtab_hash *ret;
1629 ret = _bfd_stringtab_init ();
1634 loc = _bfd_stringtab_add (ret, "", TRUE, FALSE);
1635 BFD_ASSERT (loc == 0 || loc == (bfd_size_type) -1);
1636 if (loc == (bfd_size_type) -1)
1638 _bfd_stringtab_free (ret);
1645 /* ELF .o/exec file reading */
1647 /* Create a new bfd section from an ELF section header. */
1650 bfd_section_from_shdr (bfd *abfd, unsigned int shindex)
1652 Elf_Internal_Shdr *hdr = elf_elfsections (abfd)[shindex];
1653 Elf_Internal_Ehdr *ehdr = elf_elfheader (abfd);
1654 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
1657 name = elf_string_from_elf_strtab (abfd, hdr->sh_name);
1659 switch (hdr->sh_type)
1662 /* Inactive section. Throw it away. */
1665 case SHT_PROGBITS: /* Normal section with contents. */
1666 case SHT_NOBITS: /* .bss section. */
1667 case SHT_HASH: /* .hash section. */
1668 case SHT_NOTE: /* .note section. */
1669 case SHT_INIT_ARRAY: /* .init_array section. */
1670 case SHT_FINI_ARRAY: /* .fini_array section. */
1671 case SHT_PREINIT_ARRAY: /* .preinit_array section. */
1672 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1674 case SHT_DYNAMIC: /* Dynamic linking information. */
1675 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
1677 if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_STRTAB)
1679 Elf_Internal_Shdr *dynsymhdr;
1681 /* The shared libraries distributed with hpux11 have a bogus
1682 sh_link field for the ".dynamic" section. Find the
1683 string table for the ".dynsym" section instead. */
1684 if (elf_dynsymtab (abfd) != 0)
1686 dynsymhdr = elf_elfsections (abfd)[elf_dynsymtab (abfd)];
1687 hdr->sh_link = dynsymhdr->sh_link;
1691 unsigned int i, num_sec;
1693 num_sec = elf_numsections (abfd);
1694 for (i = 1; i < num_sec; i++)
1696 dynsymhdr = elf_elfsections (abfd)[i];
1697 if (dynsymhdr->sh_type == SHT_DYNSYM)
1699 hdr->sh_link = dynsymhdr->sh_link;
1707 case SHT_SYMTAB: /* A symbol table */
1708 if (elf_onesymtab (abfd) == shindex)
1711 BFD_ASSERT (hdr->sh_entsize == bed->s->sizeof_sym);
1712 BFD_ASSERT (elf_onesymtab (abfd) == 0);
1713 elf_onesymtab (abfd) = shindex;
1714 elf_tdata (abfd)->symtab_hdr = *hdr;
1715 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->symtab_hdr;
1716 abfd->flags |= HAS_SYMS;
1718 /* Sometimes a shared object will map in the symbol table. If
1719 SHF_ALLOC is set, and this is a shared object, then we also
1720 treat this section as a BFD section. We can not base the
1721 decision purely on SHF_ALLOC, because that flag is sometimes
1722 set in a relocatable object file, which would confuse the
1724 if ((hdr->sh_flags & SHF_ALLOC) != 0
1725 && (abfd->flags & DYNAMIC) != 0
1726 && ! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
1731 case SHT_DYNSYM: /* A dynamic symbol table */
1732 if (elf_dynsymtab (abfd) == shindex)
1735 BFD_ASSERT (hdr->sh_entsize == bed->s->sizeof_sym);
1736 BFD_ASSERT (elf_dynsymtab (abfd) == 0);
1737 elf_dynsymtab (abfd) = shindex;
1738 elf_tdata (abfd)->dynsymtab_hdr = *hdr;
1739 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->dynsymtab_hdr;
1740 abfd->flags |= HAS_SYMS;
1742 /* Besides being a symbol table, we also treat this as a regular
1743 section, so that objcopy can handle it. */
1744 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1746 case SHT_SYMTAB_SHNDX: /* Symbol section indices when >64k sections */
1747 if (elf_symtab_shndx (abfd) == shindex)
1750 /* Get the associated symbol table. */
1751 if (! bfd_section_from_shdr (abfd, hdr->sh_link)
1752 || hdr->sh_link != elf_onesymtab (abfd))
1755 elf_symtab_shndx (abfd) = shindex;
1756 elf_tdata (abfd)->symtab_shndx_hdr = *hdr;
1757 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->symtab_shndx_hdr;
1760 case SHT_STRTAB: /* A string table */
1761 if (hdr->bfd_section != NULL)
1763 if (ehdr->e_shstrndx == shindex)
1765 elf_tdata (abfd)->shstrtab_hdr = *hdr;
1766 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->shstrtab_hdr;
1770 unsigned int i, num_sec;
1772 num_sec = elf_numsections (abfd);
1773 for (i = 1; i < num_sec; i++)
1775 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1776 if (hdr2->sh_link == shindex)
1778 if (! bfd_section_from_shdr (abfd, i))
1780 if (elf_onesymtab (abfd) == i)
1782 elf_tdata (abfd)->strtab_hdr = *hdr;
1783 elf_elfsections (abfd)[shindex] =
1784 &elf_tdata (abfd)->strtab_hdr;
1787 if (elf_dynsymtab (abfd) == i)
1789 elf_tdata (abfd)->dynstrtab_hdr = *hdr;
1790 elf_elfsections (abfd)[shindex] = hdr =
1791 &elf_tdata (abfd)->dynstrtab_hdr;
1792 /* We also treat this as a regular section, so
1793 that objcopy can handle it. */
1796 #if 0 /* Not handling other string tables specially right now. */
1797 hdr2 = elf_elfsections (abfd)[i]; /* in case it moved */
1798 /* We have a strtab for some random other section. */
1799 newsect = (asection *) hdr2->bfd_section;
1802 hdr->bfd_section = newsect;
1803 hdr2 = &elf_section_data (newsect)->str_hdr;
1805 elf_elfsections (abfd)[shindex] = hdr2;
1811 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1815 /* *These* do a lot of work -- but build no sections! */
1817 asection *target_sect;
1818 Elf_Internal_Shdr *hdr2;
1819 unsigned int num_sec = elf_numsections (abfd);
1821 /* Check for a bogus link to avoid crashing. */
1822 if ((hdr->sh_link >= SHN_LORESERVE && hdr->sh_link <= SHN_HIRESERVE)
1823 || hdr->sh_link >= num_sec)
1825 ((*_bfd_error_handler)
1826 (_("%s: invalid link %lu for reloc section %s (index %u)"),
1827 bfd_archive_filename (abfd), hdr->sh_link, name, shindex));
1828 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1831 /* For some incomprehensible reason Oracle distributes
1832 libraries for Solaris in which some of the objects have
1833 bogus sh_link fields. It would be nice if we could just
1834 reject them, but, unfortunately, some people need to use
1835 them. We scan through the section headers; if we find only
1836 one suitable symbol table, we clobber the sh_link to point
1837 to it. I hope this doesn't break anything. */
1838 if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_SYMTAB
1839 && elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_DYNSYM)
1845 for (scan = 1; scan < num_sec; scan++)
1847 if (elf_elfsections (abfd)[scan]->sh_type == SHT_SYMTAB
1848 || elf_elfsections (abfd)[scan]->sh_type == SHT_DYNSYM)
1859 hdr->sh_link = found;
1862 /* Get the symbol table. */
1863 if (elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_SYMTAB
1864 && ! bfd_section_from_shdr (abfd, hdr->sh_link))
1867 /* If this reloc section does not use the main symbol table we
1868 don't treat it as a reloc section. BFD can't adequately
1869 represent such a section, so at least for now, we don't
1870 try. We just present it as a normal section. We also
1871 can't use it as a reloc section if it points to the null
1873 if (hdr->sh_link != elf_onesymtab (abfd) || hdr->sh_info == SHN_UNDEF)
1874 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1876 if (! bfd_section_from_shdr (abfd, hdr->sh_info))
1878 target_sect = bfd_section_from_elf_index (abfd, hdr->sh_info);
1879 if (target_sect == NULL)
1882 if ((target_sect->flags & SEC_RELOC) == 0
1883 || target_sect->reloc_count == 0)
1884 hdr2 = &elf_section_data (target_sect)->rel_hdr;
1888 BFD_ASSERT (elf_section_data (target_sect)->rel_hdr2 == NULL);
1889 amt = sizeof (*hdr2);
1890 hdr2 = bfd_alloc (abfd, amt);
1891 elf_section_data (target_sect)->rel_hdr2 = hdr2;
1894 elf_elfsections (abfd)[shindex] = hdr2;
1895 target_sect->reloc_count += NUM_SHDR_ENTRIES (hdr);
1896 target_sect->flags |= SEC_RELOC;
1897 target_sect->relocation = NULL;
1898 target_sect->rel_filepos = hdr->sh_offset;
1899 /* In the section to which the relocations apply, mark whether
1900 its relocations are of the REL or RELA variety. */
1901 if (hdr->sh_size != 0)
1902 target_sect->use_rela_p = hdr->sh_type == SHT_RELA;
1903 abfd->flags |= HAS_RELOC;
1908 case SHT_GNU_verdef:
1909 elf_dynverdef (abfd) = shindex;
1910 elf_tdata (abfd)->dynverdef_hdr = *hdr;
1911 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1914 case SHT_GNU_versym:
1915 elf_dynversym (abfd) = shindex;
1916 elf_tdata (abfd)->dynversym_hdr = *hdr;
1917 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1920 case SHT_GNU_verneed:
1921 elf_dynverref (abfd) = shindex;
1922 elf_tdata (abfd)->dynverref_hdr = *hdr;
1923 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1930 /* We need a BFD section for objcopy and relocatable linking,
1931 and it's handy to have the signature available as the section
1933 name = group_signature (abfd, hdr);
1936 if (!_bfd_elf_make_section_from_shdr (abfd, hdr, name))
1938 if (hdr->contents != NULL)
1940 Elf_Internal_Group *idx = (Elf_Internal_Group *) hdr->contents;
1941 unsigned int n_elt = hdr->sh_size / 4;
1944 if (idx->flags & GRP_COMDAT)
1945 hdr->bfd_section->flags
1946 |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
1948 while (--n_elt != 0)
1949 if ((s = (++idx)->shdr->bfd_section) != NULL
1950 && elf_next_in_group (s) != NULL)
1952 elf_next_in_group (hdr->bfd_section) = s;
1959 /* Check for any processor-specific section types. */
1961 if (bed->elf_backend_section_from_shdr)
1962 (*bed->elf_backend_section_from_shdr) (abfd, hdr, name);
1970 /* Return the section for the local symbol specified by ABFD, R_SYMNDX.
1971 Return SEC for sections that have no elf section, and NULL on error. */
1974 bfd_section_from_r_symndx (bfd *abfd,
1975 struct sym_sec_cache *cache,
1977 unsigned long r_symndx)
1979 Elf_Internal_Shdr *symtab_hdr;
1980 unsigned char esym[sizeof (Elf64_External_Sym)];
1981 Elf_External_Sym_Shndx eshndx;
1982 Elf_Internal_Sym isym;
1983 unsigned int ent = r_symndx % LOCAL_SYM_CACHE_SIZE;
1985 if (cache->abfd == abfd && cache->indx[ent] == r_symndx)
1986 return cache->sec[ent];
1988 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1989 if (bfd_elf_get_elf_syms (abfd, symtab_hdr, 1, r_symndx,
1990 &isym, esym, &eshndx) == NULL)
1993 if (cache->abfd != abfd)
1995 memset (cache->indx, -1, sizeof (cache->indx));
1998 cache->indx[ent] = r_symndx;
1999 cache->sec[ent] = sec;
2000 if ((isym.st_shndx != SHN_UNDEF && isym.st_shndx < SHN_LORESERVE)
2001 || isym.st_shndx > SHN_HIRESERVE)
2004 s = bfd_section_from_elf_index (abfd, isym.st_shndx);
2006 cache->sec[ent] = s;
2008 return cache->sec[ent];
2011 /* Given an ELF section number, retrieve the corresponding BFD
2015 bfd_section_from_elf_index (bfd *abfd, unsigned int index)
2017 if (index >= elf_numsections (abfd))
2019 return elf_elfsections (abfd)[index]->bfd_section;
2022 static struct bfd_elf_special_section const special_sections[] =
2024 { ".bss", 4, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2025 { ".gnu.linkonce.b",15, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2026 { ".comment", 8, 0, SHT_PROGBITS, 0 },
2027 { ".data", 5, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2028 { ".data1", 6, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2029 { ".debug", 6, 0, SHT_PROGBITS, 0 },
2030 { ".fini", 5, 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2031 { ".init", 5, 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2032 { ".line", 5, 0, SHT_PROGBITS, 0 },
2033 { ".rodata", 7, -2, SHT_PROGBITS, SHF_ALLOC },
2034 { ".rodata1", 8, 0, SHT_PROGBITS, SHF_ALLOC },
2035 { ".tbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
2036 { ".tdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
2037 { ".text", 5, -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2038 { ".init_array", 11, 0, SHT_INIT_ARRAY, SHF_ALLOC + SHF_WRITE },
2039 { ".fini_array", 11, 0, SHT_FINI_ARRAY, SHF_ALLOC + SHF_WRITE },
2040 { ".preinit_array", 14, 0, SHT_PREINIT_ARRAY, SHF_ALLOC + SHF_WRITE },
2041 { ".debug_line", 11, 0, SHT_PROGBITS, 0 },
2042 { ".debug_info", 11, 0, SHT_PROGBITS, 0 },
2043 { ".debug_abbrev", 13, 0, SHT_PROGBITS, 0 },
2044 { ".debug_aranges", 14, 0, SHT_PROGBITS, 0 },
2045 { ".dynamic", 8, 0, SHT_DYNAMIC, SHF_ALLOC },
2046 { ".dynstr", 7, 0, SHT_STRTAB, SHF_ALLOC },
2047 { ".dynsym", 7, 0, SHT_DYNSYM, SHF_ALLOC },
2048 { ".got", 4, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2049 { ".hash", 5, 0, SHT_HASH, SHF_ALLOC },
2050 { ".interp", 7, 0, SHT_PROGBITS, 0 },
2051 { ".plt", 4, 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2052 { ".shstrtab", 9, 0, SHT_STRTAB, 0 },
2053 { ".strtab", 7, 0, SHT_STRTAB, 0 },
2054 { ".symtab", 7, 0, SHT_SYMTAB, 0 },
2055 { ".gnu.version", 12, 0, SHT_GNU_versym, 0 },
2056 { ".gnu.version_d", 14, 0, SHT_GNU_verdef, 0 },
2057 { ".gnu.version_r", 14, 0, SHT_GNU_verneed, 0 },
2058 { ".note", 5, -1, SHT_NOTE, 0 },
2059 { ".rela", 5, -1, SHT_RELA, 0 },
2060 { ".rel", 4, -1, SHT_REL, 0 },
2061 { ".stabstr", 5, 3, SHT_STRTAB, 0 },
2062 { NULL, 0, 0, 0, 0 }
2065 static const struct bfd_elf_special_section *
2066 get_special_section (const char *name,
2067 const struct bfd_elf_special_section *special_sections,
2071 int len = strlen (name);
2073 for (i = 0; special_sections[i].prefix != NULL; i++)
2076 int prefix_len = special_sections[i].prefix_length;
2078 if (len < prefix_len)
2080 if (memcmp (name, special_sections[i].prefix, prefix_len) != 0)
2083 suffix_len = special_sections[i].suffix_length;
2084 if (suffix_len <= 0)
2086 if (name[prefix_len] != 0)
2088 if (suffix_len == 0)
2090 if (name[prefix_len] != '.'
2091 && (suffix_len == -2
2092 || (rela && special_sections[i].type == SHT_REL)))
2098 if (len < prefix_len + suffix_len)
2100 if (memcmp (name + len - suffix_len,
2101 special_sections[i].prefix + prefix_len,
2105 return &special_sections[i];
2111 const struct bfd_elf_special_section *
2112 _bfd_elf_get_sec_type_attr (bfd *abfd, const char *name)
2114 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2115 const struct bfd_elf_special_section *ssect = NULL;
2117 /* See if this is one of the special sections. */
2120 unsigned int rela = bed->default_use_rela_p;
2122 if (bed->special_sections)
2123 ssect = get_special_section (name, bed->special_sections, rela);
2126 ssect = get_special_section (name, special_sections, rela);
2133 _bfd_elf_new_section_hook (bfd *abfd, asection *sec)
2135 struct bfd_elf_section_data *sdata;
2136 const struct bfd_elf_special_section *ssect;
2138 sdata = (struct bfd_elf_section_data *) sec->used_by_bfd;
2141 sdata = bfd_zalloc (abfd, sizeof (*sdata));
2144 sec->used_by_bfd = sdata;
2147 elf_section_type (sec) = SHT_NULL;
2148 ssect = _bfd_elf_get_sec_type_attr (abfd, sec->name);
2151 elf_section_type (sec) = ssect->type;
2152 elf_section_flags (sec) = ssect->attr;
2155 /* Indicate whether or not this section should use RELA relocations. */
2156 sec->use_rela_p = get_elf_backend_data (abfd)->default_use_rela_p;
2161 /* Create a new bfd section from an ELF program header.
2163 Since program segments have no names, we generate a synthetic name
2164 of the form segment<NUM>, where NUM is generally the index in the
2165 program header table. For segments that are split (see below) we
2166 generate the names segment<NUM>a and segment<NUM>b.
2168 Note that some program segments may have a file size that is different than
2169 (less than) the memory size. All this means is that at execution the
2170 system must allocate the amount of memory specified by the memory size,
2171 but only initialize it with the first "file size" bytes read from the
2172 file. This would occur for example, with program segments consisting
2173 of combined data+bss.
2175 To handle the above situation, this routine generates TWO bfd sections
2176 for the single program segment. The first has the length specified by
2177 the file size of the segment, and the second has the length specified
2178 by the difference between the two sizes. In effect, the segment is split
2179 into it's initialized and uninitialized parts.
2184 _bfd_elf_make_section_from_phdr (bfd *abfd,
2185 Elf_Internal_Phdr *hdr,
2187 const char *typename)
2195 split = ((hdr->p_memsz > 0)
2196 && (hdr->p_filesz > 0)
2197 && (hdr->p_memsz > hdr->p_filesz));
2198 sprintf (namebuf, "%s%d%s", typename, index, split ? "a" : "");
2199 len = strlen (namebuf) + 1;
2200 name = bfd_alloc (abfd, len);
2203 memcpy (name, namebuf, len);
2204 newsect = bfd_make_section (abfd, name);
2205 if (newsect == NULL)
2207 newsect->vma = hdr->p_vaddr;
2208 newsect->lma = hdr->p_paddr;
2209 newsect->_raw_size = hdr->p_filesz;
2210 newsect->filepos = hdr->p_offset;
2211 newsect->flags |= SEC_HAS_CONTENTS;
2212 newsect->alignment_power = bfd_log2 (hdr->p_align);
2213 if (hdr->p_type == PT_LOAD)
2215 newsect->flags |= SEC_ALLOC;
2216 newsect->flags |= SEC_LOAD;
2217 if (hdr->p_flags & PF_X)
2219 /* FIXME: all we known is that it has execute PERMISSION,
2221 newsect->flags |= SEC_CODE;
2224 if (!(hdr->p_flags & PF_W))
2226 newsect->flags |= SEC_READONLY;
2231 sprintf (namebuf, "%s%db", typename, index);
2232 len = strlen (namebuf) + 1;
2233 name = bfd_alloc (abfd, len);
2236 memcpy (name, namebuf, len);
2237 newsect = bfd_make_section (abfd, name);
2238 if (newsect == NULL)
2240 newsect->vma = hdr->p_vaddr + hdr->p_filesz;
2241 newsect->lma = hdr->p_paddr + hdr->p_filesz;
2242 newsect->_raw_size = hdr->p_memsz - hdr->p_filesz;
2243 if (hdr->p_type == PT_LOAD)
2245 newsect->flags |= SEC_ALLOC;
2246 if (hdr->p_flags & PF_X)
2247 newsect->flags |= SEC_CODE;
2249 if (!(hdr->p_flags & PF_W))
2250 newsect->flags |= SEC_READONLY;
2257 bfd_section_from_phdr (bfd *abfd, Elf_Internal_Phdr *hdr, int index)
2259 const struct elf_backend_data *bed;
2261 switch (hdr->p_type)
2264 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "null");
2267 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "load");
2270 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "dynamic");
2273 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "interp");
2276 if (! _bfd_elf_make_section_from_phdr (abfd, hdr, index, "note"))
2278 if (! elfcore_read_notes (abfd, hdr->p_offset, hdr->p_filesz))
2283 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "shlib");
2286 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "phdr");
2288 case PT_GNU_EH_FRAME:
2289 return _bfd_elf_make_section_from_phdr (abfd, hdr, index,
2293 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "stack");
2296 /* Check for any processor-specific program segment types.
2297 If no handler for them, default to making "segment" sections. */
2298 bed = get_elf_backend_data (abfd);
2299 if (bed->elf_backend_section_from_phdr)
2300 return (*bed->elf_backend_section_from_phdr) (abfd, hdr, index);
2302 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "segment");
2306 /* Initialize REL_HDR, the section-header for new section, containing
2307 relocations against ASECT. If USE_RELA_P is TRUE, we use RELA
2308 relocations; otherwise, we use REL relocations. */
2311 _bfd_elf_init_reloc_shdr (bfd *abfd,
2312 Elf_Internal_Shdr *rel_hdr,
2314 bfd_boolean use_rela_p)
2317 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2318 bfd_size_type amt = sizeof ".rela" + strlen (asect->name);
2320 name = bfd_alloc (abfd, amt);
2323 sprintf (name, "%s%s", use_rela_p ? ".rela" : ".rel", asect->name);
2325 (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd), name,
2327 if (rel_hdr->sh_name == (unsigned int) -1)
2329 rel_hdr->sh_type = use_rela_p ? SHT_RELA : SHT_REL;
2330 rel_hdr->sh_entsize = (use_rela_p
2331 ? bed->s->sizeof_rela
2332 : bed->s->sizeof_rel);
2333 rel_hdr->sh_addralign = 1 << bed->s->log_file_align;
2334 rel_hdr->sh_flags = 0;
2335 rel_hdr->sh_addr = 0;
2336 rel_hdr->sh_size = 0;
2337 rel_hdr->sh_offset = 0;
2342 /* Set up an ELF internal section header for a section. */
2345 elf_fake_sections (bfd *abfd, asection *asect, void *failedptrarg)
2347 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2348 bfd_boolean *failedptr = failedptrarg;
2349 Elf_Internal_Shdr *this_hdr;
2353 /* We already failed; just get out of the bfd_map_over_sections
2358 this_hdr = &elf_section_data (asect)->this_hdr;
2360 this_hdr->sh_name = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
2361 asect->name, FALSE);
2362 if (this_hdr->sh_name == (unsigned int) -1)
2368 this_hdr->sh_flags = 0;
2370 if ((asect->flags & SEC_ALLOC) != 0
2371 || asect->user_set_vma)
2372 this_hdr->sh_addr = asect->vma;
2374 this_hdr->sh_addr = 0;
2376 this_hdr->sh_offset = 0;
2377 this_hdr->sh_size = asect->_raw_size;
2378 this_hdr->sh_link = 0;
2379 this_hdr->sh_addralign = 1 << asect->alignment_power;
2380 /* The sh_entsize and sh_info fields may have been set already by
2381 copy_private_section_data. */
2383 this_hdr->bfd_section = asect;
2384 this_hdr->contents = NULL;
2386 /* If the section type is unspecified, we set it based on
2388 if (this_hdr->sh_type == SHT_NULL)
2390 if ((asect->flags & SEC_ALLOC) != 0
2391 && (((asect->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
2392 || (asect->flags & SEC_NEVER_LOAD) != 0))
2393 this_hdr->sh_type = SHT_NOBITS;
2395 this_hdr->sh_type = SHT_PROGBITS;
2398 switch (this_hdr->sh_type)
2404 case SHT_INIT_ARRAY:
2405 case SHT_FINI_ARRAY:
2406 case SHT_PREINIT_ARRAY:
2413 this_hdr->sh_entsize = bed->s->sizeof_hash_entry;
2417 this_hdr->sh_entsize = bed->s->sizeof_sym;
2421 this_hdr->sh_entsize = bed->s->sizeof_dyn;
2425 if (get_elf_backend_data (abfd)->may_use_rela_p)
2426 this_hdr->sh_entsize = bed->s->sizeof_rela;
2430 if (get_elf_backend_data (abfd)->may_use_rel_p)
2431 this_hdr->sh_entsize = bed->s->sizeof_rel;
2434 case SHT_GNU_versym:
2435 this_hdr->sh_entsize = sizeof (Elf_External_Versym);
2438 case SHT_GNU_verdef:
2439 this_hdr->sh_entsize = 0;
2440 /* objcopy or strip will copy over sh_info, but may not set
2441 cverdefs. The linker will set cverdefs, but sh_info will be
2443 if (this_hdr->sh_info == 0)
2444 this_hdr->sh_info = elf_tdata (abfd)->cverdefs;
2446 BFD_ASSERT (elf_tdata (abfd)->cverdefs == 0
2447 || this_hdr->sh_info == elf_tdata (abfd)->cverdefs);
2450 case SHT_GNU_verneed:
2451 this_hdr->sh_entsize = 0;
2452 /* objcopy or strip will copy over sh_info, but may not set
2453 cverrefs. The linker will set cverrefs, but sh_info will be
2455 if (this_hdr->sh_info == 0)
2456 this_hdr->sh_info = elf_tdata (abfd)->cverrefs;
2458 BFD_ASSERT (elf_tdata (abfd)->cverrefs == 0
2459 || this_hdr->sh_info == elf_tdata (abfd)->cverrefs);
2463 this_hdr->sh_entsize = 4;
2467 if ((asect->flags & SEC_ALLOC) != 0)
2468 this_hdr->sh_flags |= SHF_ALLOC;
2469 if ((asect->flags & SEC_READONLY) == 0)
2470 this_hdr->sh_flags |= SHF_WRITE;
2471 if ((asect->flags & SEC_CODE) != 0)
2472 this_hdr->sh_flags |= SHF_EXECINSTR;
2473 if ((asect->flags & SEC_MERGE) != 0)
2475 this_hdr->sh_flags |= SHF_MERGE;
2476 this_hdr->sh_entsize = asect->entsize;
2477 if ((asect->flags & SEC_STRINGS) != 0)
2478 this_hdr->sh_flags |= SHF_STRINGS;
2480 if ((asect->flags & SEC_GROUP) == 0 && elf_group_name (asect) != NULL)
2481 this_hdr->sh_flags |= SHF_GROUP;
2482 if ((asect->flags & SEC_THREAD_LOCAL) != 0)
2484 this_hdr->sh_flags |= SHF_TLS;
2485 if (asect->_raw_size == 0 && (asect->flags & SEC_HAS_CONTENTS) == 0)
2487 struct bfd_link_order *o;
2489 this_hdr->sh_size = 0;
2490 for (o = asect->link_order_head; o != NULL; o = o->next)
2491 if (this_hdr->sh_size < o->offset + o->size)
2492 this_hdr->sh_size = o->offset + o->size;
2493 if (this_hdr->sh_size)
2494 this_hdr->sh_type = SHT_NOBITS;
2498 /* Check for processor-specific section types. */
2499 if (bed->elf_backend_fake_sections
2500 && !(*bed->elf_backend_fake_sections) (abfd, this_hdr, asect))
2503 /* If the section has relocs, set up a section header for the
2504 SHT_REL[A] section. If two relocation sections are required for
2505 this section, it is up to the processor-specific back-end to
2506 create the other. */
2507 if ((asect->flags & SEC_RELOC) != 0
2508 && !_bfd_elf_init_reloc_shdr (abfd,
2509 &elf_section_data (asect)->rel_hdr,
2515 /* Fill in the contents of a SHT_GROUP section. */
2518 bfd_elf_set_group_contents (bfd *abfd, asection *sec, void *failedptrarg)
2520 bfd_boolean *failedptr = failedptrarg;
2521 unsigned long symindx;
2522 asection *elt, *first;
2524 struct bfd_link_order *l;
2527 if (elf_section_data (sec)->this_hdr.sh_type != SHT_GROUP
2532 if (elf_group_id (sec) != NULL)
2533 symindx = elf_group_id (sec)->udata.i;
2537 /* If called from the assembler, swap_out_syms will have set up
2538 elf_section_syms; If called for "ld -r", use target_index. */
2539 if (elf_section_syms (abfd) != NULL)
2540 symindx = elf_section_syms (abfd)[sec->index]->udata.i;
2542 symindx = sec->target_index;
2544 elf_section_data (sec)->this_hdr.sh_info = symindx;
2546 /* The contents won't be allocated for "ld -r" or objcopy. */
2548 if (sec->contents == NULL)
2551 sec->contents = bfd_alloc (abfd, sec->_raw_size);
2553 /* Arrange for the section to be written out. */
2554 elf_section_data (sec)->this_hdr.contents = sec->contents;
2555 if (sec->contents == NULL)
2562 loc = sec->contents + sec->_raw_size;
2564 /* Get the pointer to the first section in the group that gas
2565 squirreled away here. objcopy arranges for this to be set to the
2566 start of the input section group. */
2567 first = elt = elf_next_in_group (sec);
2569 /* First element is a flag word. Rest of section is elf section
2570 indices for all the sections of the group. Write them backwards
2571 just to keep the group in the same order as given in .section
2572 directives, not that it matters. */
2581 s = s->output_section;
2584 idx = elf_section_data (s)->this_idx;
2585 H_PUT_32 (abfd, idx, loc);
2586 elt = elf_next_in_group (elt);
2591 /* If this is a relocatable link, then the above did nothing because
2592 SEC is the output section. Look through the input sections
2594 for (l = sec->link_order_head; l != NULL; l = l->next)
2595 if (l->type == bfd_indirect_link_order
2596 && (elt = elf_next_in_group (l->u.indirect.section)) != NULL)
2601 elf_section_data (elt->output_section)->this_idx, loc);
2602 elt = elf_next_in_group (elt);
2603 /* During a relocatable link, the lists are circular. */
2605 while (elt != elf_next_in_group (l->u.indirect.section));
2607 /* With ld -r, merging SHT_GROUP sections results in wasted space
2608 due to allowing for the flag word on each input. We may well
2609 duplicate entries too. */
2610 while ((loc -= 4) > sec->contents)
2611 H_PUT_32 (abfd, 0, loc);
2613 if (loc != sec->contents)
2616 H_PUT_32 (abfd, sec->flags & SEC_LINK_ONCE ? GRP_COMDAT : 0, loc);
2619 /* Assign all ELF section numbers. The dummy first section is handled here
2620 too. The link/info pointers for the standard section types are filled
2621 in here too, while we're at it. */
2624 assign_section_numbers (bfd *abfd)
2626 struct elf_obj_tdata *t = elf_tdata (abfd);
2628 unsigned int section_number, secn;
2629 Elf_Internal_Shdr **i_shdrp;
2634 _bfd_elf_strtab_clear_all_refs (elf_shstrtab (abfd));
2636 for (sec = abfd->sections; sec; sec = sec->next)
2638 struct bfd_elf_section_data *d = elf_section_data (sec);
2640 if (section_number == SHN_LORESERVE)
2641 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2642 d->this_idx = section_number++;
2643 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->this_hdr.sh_name);
2644 if ((sec->flags & SEC_RELOC) == 0)
2648 if (section_number == SHN_LORESERVE)
2649 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2650 d->rel_idx = section_number++;
2651 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rel_hdr.sh_name);
2656 if (section_number == SHN_LORESERVE)
2657 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2658 d->rel_idx2 = section_number++;
2659 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rel_hdr2->sh_name);
2665 if (section_number == SHN_LORESERVE)
2666 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2667 t->shstrtab_section = section_number++;
2668 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->shstrtab_hdr.sh_name);
2669 elf_elfheader (abfd)->e_shstrndx = t->shstrtab_section;
2671 if (bfd_get_symcount (abfd) > 0)
2673 if (section_number == SHN_LORESERVE)
2674 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2675 t->symtab_section = section_number++;
2676 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->symtab_hdr.sh_name);
2677 if (section_number > SHN_LORESERVE - 2)
2679 if (section_number == SHN_LORESERVE)
2680 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2681 t->symtab_shndx_section = section_number++;
2682 t->symtab_shndx_hdr.sh_name
2683 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
2684 ".symtab_shndx", FALSE);
2685 if (t->symtab_shndx_hdr.sh_name == (unsigned int) -1)
2688 if (section_number == SHN_LORESERVE)
2689 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2690 t->strtab_section = section_number++;
2691 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->strtab_hdr.sh_name);
2694 _bfd_elf_strtab_finalize (elf_shstrtab (abfd));
2695 t->shstrtab_hdr.sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
2697 elf_numsections (abfd) = section_number;
2698 elf_elfheader (abfd)->e_shnum = section_number;
2699 if (section_number > SHN_LORESERVE)
2700 elf_elfheader (abfd)->e_shnum -= SHN_HIRESERVE + 1 - SHN_LORESERVE;
2702 /* Set up the list of section header pointers, in agreement with the
2704 amt = section_number * sizeof (Elf_Internal_Shdr *);
2705 i_shdrp = bfd_zalloc (abfd, amt);
2706 if (i_shdrp == NULL)
2709 amt = sizeof (Elf_Internal_Shdr);
2710 i_shdrp[0] = bfd_zalloc (abfd, amt);
2711 if (i_shdrp[0] == NULL)
2713 bfd_release (abfd, i_shdrp);
2717 elf_elfsections (abfd) = i_shdrp;
2719 i_shdrp[t->shstrtab_section] = &t->shstrtab_hdr;
2720 if (bfd_get_symcount (abfd) > 0)
2722 i_shdrp[t->symtab_section] = &t->symtab_hdr;
2723 if (elf_numsections (abfd) > SHN_LORESERVE)
2725 i_shdrp[t->symtab_shndx_section] = &t->symtab_shndx_hdr;
2726 t->symtab_shndx_hdr.sh_link = t->symtab_section;
2728 i_shdrp[t->strtab_section] = &t->strtab_hdr;
2729 t->symtab_hdr.sh_link = t->strtab_section;
2731 for (sec = abfd->sections; sec; sec = sec->next)
2733 struct bfd_elf_section_data *d = elf_section_data (sec);
2737 i_shdrp[d->this_idx] = &d->this_hdr;
2738 if (d->rel_idx != 0)
2739 i_shdrp[d->rel_idx] = &d->rel_hdr;
2740 if (d->rel_idx2 != 0)
2741 i_shdrp[d->rel_idx2] = d->rel_hdr2;
2743 /* Fill in the sh_link and sh_info fields while we're at it. */
2745 /* sh_link of a reloc section is the section index of the symbol
2746 table. sh_info is the section index of the section to which
2747 the relocation entries apply. */
2748 if (d->rel_idx != 0)
2750 d->rel_hdr.sh_link = t->symtab_section;
2751 d->rel_hdr.sh_info = d->this_idx;
2753 if (d->rel_idx2 != 0)
2755 d->rel_hdr2->sh_link = t->symtab_section;
2756 d->rel_hdr2->sh_info = d->this_idx;
2759 switch (d->this_hdr.sh_type)
2763 /* A reloc section which we are treating as a normal BFD
2764 section. sh_link is the section index of the symbol
2765 table. sh_info is the section index of the section to
2766 which the relocation entries apply. We assume that an
2767 allocated reloc section uses the dynamic symbol table.
2768 FIXME: How can we be sure? */
2769 s = bfd_get_section_by_name (abfd, ".dynsym");
2771 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
2773 /* We look up the section the relocs apply to by name. */
2775 if (d->this_hdr.sh_type == SHT_REL)
2779 s = bfd_get_section_by_name (abfd, name);
2781 d->this_hdr.sh_info = elf_section_data (s)->this_idx;
2785 /* We assume that a section named .stab*str is a stabs
2786 string section. We look for a section with the same name
2787 but without the trailing ``str'', and set its sh_link
2788 field to point to this section. */
2789 if (strncmp (sec->name, ".stab", sizeof ".stab" - 1) == 0
2790 && strcmp (sec->name + strlen (sec->name) - 3, "str") == 0)
2795 len = strlen (sec->name);
2796 alc = bfd_malloc (len - 2);
2799 memcpy (alc, sec->name, len - 3);
2800 alc[len - 3] = '\0';
2801 s = bfd_get_section_by_name (abfd, alc);
2805 elf_section_data (s)->this_hdr.sh_link = d->this_idx;
2807 /* This is a .stab section. */
2808 if (elf_section_data (s)->this_hdr.sh_entsize == 0)
2809 elf_section_data (s)->this_hdr.sh_entsize
2810 = 4 + 2 * bfd_get_arch_size (abfd) / 8;
2817 case SHT_GNU_verneed:
2818 case SHT_GNU_verdef:
2819 /* sh_link is the section header index of the string table
2820 used for the dynamic entries, or the symbol table, or the
2822 s = bfd_get_section_by_name (abfd, ".dynstr");
2824 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
2828 case SHT_GNU_versym:
2829 /* sh_link is the section header index of the symbol table
2830 this hash table or version table is for. */
2831 s = bfd_get_section_by_name (abfd, ".dynsym");
2833 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
2837 d->this_hdr.sh_link = t->symtab_section;
2841 for (secn = 1; secn < section_number; ++secn)
2842 if (i_shdrp[secn] == NULL)
2843 i_shdrp[secn] = i_shdrp[0];
2845 i_shdrp[secn]->sh_name = _bfd_elf_strtab_offset (elf_shstrtab (abfd),
2846 i_shdrp[secn]->sh_name);
2850 /* Map symbol from it's internal number to the external number, moving
2851 all local symbols to be at the head of the list. */
2854 sym_is_global (bfd *abfd, asymbol *sym)
2856 /* If the backend has a special mapping, use it. */
2857 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2858 if (bed->elf_backend_sym_is_global)
2859 return (*bed->elf_backend_sym_is_global) (abfd, sym);
2861 return ((sym->flags & (BSF_GLOBAL | BSF_WEAK)) != 0
2862 || bfd_is_und_section (bfd_get_section (sym))
2863 || bfd_is_com_section (bfd_get_section (sym)));
2867 elf_map_symbols (bfd *abfd)
2869 unsigned int symcount = bfd_get_symcount (abfd);
2870 asymbol **syms = bfd_get_outsymbols (abfd);
2871 asymbol **sect_syms;
2872 unsigned int num_locals = 0;
2873 unsigned int num_globals = 0;
2874 unsigned int num_locals2 = 0;
2875 unsigned int num_globals2 = 0;
2883 fprintf (stderr, "elf_map_symbols\n");
2887 for (asect = abfd->sections; asect; asect = asect->next)
2889 if (max_index < asect->index)
2890 max_index = asect->index;
2894 amt = max_index * sizeof (asymbol *);
2895 sect_syms = bfd_zalloc (abfd, amt);
2896 if (sect_syms == NULL)
2898 elf_section_syms (abfd) = sect_syms;
2899 elf_num_section_syms (abfd) = max_index;
2901 /* Init sect_syms entries for any section symbols we have already
2902 decided to output. */
2903 for (idx = 0; idx < symcount; idx++)
2905 asymbol *sym = syms[idx];
2907 if ((sym->flags & BSF_SECTION_SYM) != 0
2914 if (sec->owner != NULL)
2916 if (sec->owner != abfd)
2918 if (sec->output_offset != 0)
2921 sec = sec->output_section;
2923 /* Empty sections in the input files may have had a
2924 section symbol created for them. (See the comment
2925 near the end of _bfd_generic_link_output_symbols in
2926 linker.c). If the linker script discards such
2927 sections then we will reach this point. Since we know
2928 that we cannot avoid this case, we detect it and skip
2929 the abort and the assignment to the sect_syms array.
2930 To reproduce this particular case try running the
2931 linker testsuite test ld-scripts/weak.exp for an ELF
2932 port that uses the generic linker. */
2933 if (sec->owner == NULL)
2936 BFD_ASSERT (sec->owner == abfd);
2938 sect_syms[sec->index] = syms[idx];
2943 /* Classify all of the symbols. */
2944 for (idx = 0; idx < symcount; idx++)
2946 if (!sym_is_global (abfd, syms[idx]))
2952 /* We will be adding a section symbol for each BFD section. Most normal
2953 sections will already have a section symbol in outsymbols, but
2954 eg. SHT_GROUP sections will not, and we need the section symbol mapped
2955 at least in that case. */
2956 for (asect = abfd->sections; asect; asect = asect->next)
2958 if (sect_syms[asect->index] == NULL)
2960 if (!sym_is_global (abfd, asect->symbol))
2967 /* Now sort the symbols so the local symbols are first. */
2968 amt = (num_locals + num_globals) * sizeof (asymbol *);
2969 new_syms = bfd_alloc (abfd, amt);
2971 if (new_syms == NULL)
2974 for (idx = 0; idx < symcount; idx++)
2976 asymbol *sym = syms[idx];
2979 if (!sym_is_global (abfd, sym))
2982 i = num_locals + num_globals2++;
2984 sym->udata.i = i + 1;
2986 for (asect = abfd->sections; asect; asect = asect->next)
2988 if (sect_syms[asect->index] == NULL)
2990 asymbol *sym = asect->symbol;
2993 sect_syms[asect->index] = sym;
2994 if (!sym_is_global (abfd, sym))
2997 i = num_locals + num_globals2++;
2999 sym->udata.i = i + 1;
3003 bfd_set_symtab (abfd, new_syms, num_locals + num_globals);
3005 elf_num_locals (abfd) = num_locals;
3006 elf_num_globals (abfd) = num_globals;
3010 /* Align to the maximum file alignment that could be required for any
3011 ELF data structure. */
3013 static inline file_ptr
3014 align_file_position (file_ptr off, int align)
3016 return (off + align - 1) & ~(align - 1);
3019 /* Assign a file position to a section, optionally aligning to the
3020 required section alignment. */
3023 _bfd_elf_assign_file_position_for_section (Elf_Internal_Shdr *i_shdrp,
3031 al = i_shdrp->sh_addralign;
3033 offset = BFD_ALIGN (offset, al);
3035 i_shdrp->sh_offset = offset;
3036 if (i_shdrp->bfd_section != NULL)
3037 i_shdrp->bfd_section->filepos = offset;
3038 if (i_shdrp->sh_type != SHT_NOBITS)
3039 offset += i_shdrp->sh_size;
3043 /* Compute the file positions we are going to put the sections at, and
3044 otherwise prepare to begin writing out the ELF file. If LINK_INFO
3045 is not NULL, this is being called by the ELF backend linker. */
3048 _bfd_elf_compute_section_file_positions (bfd *abfd,
3049 struct bfd_link_info *link_info)
3051 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3053 struct bfd_strtab_hash *strtab;
3054 Elf_Internal_Shdr *shstrtab_hdr;
3056 if (abfd->output_has_begun)
3059 /* Do any elf backend specific processing first. */
3060 if (bed->elf_backend_begin_write_processing)
3061 (*bed->elf_backend_begin_write_processing) (abfd, link_info);
3063 if (! prep_headers (abfd))
3066 /* Post process the headers if necessary. */
3067 if (bed->elf_backend_post_process_headers)
3068 (*bed->elf_backend_post_process_headers) (abfd, link_info);
3071 bfd_map_over_sections (abfd, elf_fake_sections, &failed);
3075 if (!assign_section_numbers (abfd))
3078 /* The backend linker builds symbol table information itself. */
3079 if (link_info == NULL && bfd_get_symcount (abfd) > 0)
3081 /* Non-zero if doing a relocatable link. */
3082 int relocatable_p = ! (abfd->flags & (EXEC_P | DYNAMIC));
3084 if (! swap_out_syms (abfd, &strtab, relocatable_p))
3088 if (link_info == NULL)
3090 bfd_map_over_sections (abfd, bfd_elf_set_group_contents, &failed);
3095 shstrtab_hdr = &elf_tdata (abfd)->shstrtab_hdr;
3096 /* sh_name was set in prep_headers. */
3097 shstrtab_hdr->sh_type = SHT_STRTAB;
3098 shstrtab_hdr->sh_flags = 0;
3099 shstrtab_hdr->sh_addr = 0;
3100 shstrtab_hdr->sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
3101 shstrtab_hdr->sh_entsize = 0;
3102 shstrtab_hdr->sh_link = 0;
3103 shstrtab_hdr->sh_info = 0;
3104 /* sh_offset is set in assign_file_positions_except_relocs. */
3105 shstrtab_hdr->sh_addralign = 1;
3107 if (!assign_file_positions_except_relocs (abfd, link_info))
3110 if (link_info == NULL && bfd_get_symcount (abfd) > 0)
3113 Elf_Internal_Shdr *hdr;
3115 off = elf_tdata (abfd)->next_file_pos;
3117 hdr = &elf_tdata (abfd)->symtab_hdr;
3118 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3120 hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
3121 if (hdr->sh_size != 0)
3122 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3124 hdr = &elf_tdata (abfd)->strtab_hdr;
3125 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3127 elf_tdata (abfd)->next_file_pos = off;
3129 /* Now that we know where the .strtab section goes, write it
3131 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
3132 || ! _bfd_stringtab_emit (abfd, strtab))
3134 _bfd_stringtab_free (strtab);
3137 abfd->output_has_begun = TRUE;
3142 /* Create a mapping from a set of sections to a program segment. */
3144 static struct elf_segment_map *
3145 make_mapping (bfd *abfd,
3146 asection **sections,
3151 struct elf_segment_map *m;
3156 amt = sizeof (struct elf_segment_map);
3157 amt += (to - from - 1) * sizeof (asection *);
3158 m = bfd_zalloc (abfd, amt);
3162 m->p_type = PT_LOAD;
3163 for (i = from, hdrpp = sections + from; i < to; i++, hdrpp++)
3164 m->sections[i - from] = *hdrpp;
3165 m->count = to - from;
3167 if (from == 0 && phdr)
3169 /* Include the headers in the first PT_LOAD segment. */
3170 m->includes_filehdr = 1;
3171 m->includes_phdrs = 1;
3177 /* Set up a mapping from BFD sections to program segments. */
3180 map_sections_to_segments (bfd *abfd)
3182 asection **sections = NULL;
3186 struct elf_segment_map *mfirst;
3187 struct elf_segment_map **pm;
3188 struct elf_segment_map *m;
3191 unsigned int phdr_index;
3192 bfd_vma maxpagesize;
3194 bfd_boolean phdr_in_segment = TRUE;
3195 bfd_boolean writable;
3197 asection *first_tls = NULL;
3198 asection *dynsec, *eh_frame_hdr;
3201 if (elf_tdata (abfd)->segment_map != NULL)
3204 if (bfd_count_sections (abfd) == 0)
3207 /* Select the allocated sections, and sort them. */
3209 amt = bfd_count_sections (abfd) * sizeof (asection *);
3210 sections = bfd_malloc (amt);
3211 if (sections == NULL)
3215 for (s = abfd->sections; s != NULL; s = s->next)
3217 if ((s->flags & SEC_ALLOC) != 0)
3223 BFD_ASSERT (i <= bfd_count_sections (abfd));
3226 qsort (sections, (size_t) count, sizeof (asection *), elf_sort_sections);
3228 /* Build the mapping. */
3233 /* If we have a .interp section, then create a PT_PHDR segment for
3234 the program headers and a PT_INTERP segment for the .interp
3236 s = bfd_get_section_by_name (abfd, ".interp");
3237 if (s != NULL && (s->flags & SEC_LOAD) != 0)
3239 amt = sizeof (struct elf_segment_map);
3240 m = bfd_zalloc (abfd, amt);
3244 m->p_type = PT_PHDR;
3245 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
3246 m->p_flags = PF_R | PF_X;
3247 m->p_flags_valid = 1;
3248 m->includes_phdrs = 1;
3253 amt = sizeof (struct elf_segment_map);
3254 m = bfd_zalloc (abfd, amt);
3258 m->p_type = PT_INTERP;
3266 /* Look through the sections. We put sections in the same program
3267 segment when the start of the second section can be placed within
3268 a few bytes of the end of the first section. */
3272 maxpagesize = get_elf_backend_data (abfd)->maxpagesize;
3274 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
3276 && (dynsec->flags & SEC_LOAD) == 0)
3279 /* Deal with -Ttext or something similar such that the first section
3280 is not adjacent to the program headers. This is an
3281 approximation, since at this point we don't know exactly how many
3282 program headers we will need. */
3285 bfd_size_type phdr_size;
3287 phdr_size = elf_tdata (abfd)->program_header_size;
3289 phdr_size = get_elf_backend_data (abfd)->s->sizeof_phdr;
3290 if ((abfd->flags & D_PAGED) == 0
3291 || sections[0]->lma < phdr_size
3292 || sections[0]->lma % maxpagesize < phdr_size % maxpagesize)
3293 phdr_in_segment = FALSE;
3296 for (i = 0, hdrpp = sections; i < count; i++, hdrpp++)
3299 bfd_boolean new_segment;
3303 /* See if this section and the last one will fit in the same
3306 if (last_hdr == NULL)
3308 /* If we don't have a segment yet, then we don't need a new
3309 one (we build the last one after this loop). */
3310 new_segment = FALSE;
3312 else if (last_hdr->lma - last_hdr->vma != hdr->lma - hdr->vma)
3314 /* If this section has a different relation between the
3315 virtual address and the load address, then we need a new
3319 else if (BFD_ALIGN (last_hdr->lma + last_size, maxpagesize)
3320 < BFD_ALIGN (hdr->lma, maxpagesize))
3322 /* If putting this section in this segment would force us to
3323 skip a page in the segment, then we need a new segment. */
3326 else if ((last_hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0
3327 && (hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) != 0)
3329 /* We don't want to put a loadable section after a
3330 nonloadable section in the same segment.
3331 Consider .tbss sections as loadable for this purpose. */
3334 else if ((abfd->flags & D_PAGED) == 0)
3336 /* If the file is not demand paged, which means that we
3337 don't require the sections to be correctly aligned in the
3338 file, then there is no other reason for a new segment. */
3339 new_segment = FALSE;
3342 && (hdr->flags & SEC_READONLY) == 0
3343 && (((last_hdr->lma + last_size - 1)
3344 & ~(maxpagesize - 1))
3345 != (hdr->lma & ~(maxpagesize - 1))))
3347 /* We don't want to put a writable section in a read only
3348 segment, unless they are on the same page in memory
3349 anyhow. We already know that the last section does not
3350 bring us past the current section on the page, so the
3351 only case in which the new section is not on the same
3352 page as the previous section is when the previous section
3353 ends precisely on a page boundary. */
3358 /* Otherwise, we can use the same segment. */
3359 new_segment = FALSE;
3364 if ((hdr->flags & SEC_READONLY) == 0)
3367 /* .tbss sections effectively have zero size. */
3368 if ((hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD)) != SEC_THREAD_LOCAL)
3369 last_size = hdr->_raw_size;
3375 /* We need a new program segment. We must create a new program
3376 header holding all the sections from phdr_index until hdr. */
3378 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
3385 if ((hdr->flags & SEC_READONLY) == 0)
3391 /* .tbss sections effectively have zero size. */
3392 if ((hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD)) != SEC_THREAD_LOCAL)
3393 last_size = hdr->_raw_size;
3397 phdr_in_segment = FALSE;
3400 /* Create a final PT_LOAD program segment. */
3401 if (last_hdr != NULL)
3403 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
3411 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
3414 amt = sizeof (struct elf_segment_map);
3415 m = bfd_zalloc (abfd, amt);
3419 m->p_type = PT_DYNAMIC;
3421 m->sections[0] = dynsec;
3427 /* For each loadable .note section, add a PT_NOTE segment. We don't
3428 use bfd_get_section_by_name, because if we link together
3429 nonloadable .note sections and loadable .note sections, we will
3430 generate two .note sections in the output file. FIXME: Using
3431 names for section types is bogus anyhow. */
3432 for (s = abfd->sections; s != NULL; s = s->next)
3434 if ((s->flags & SEC_LOAD) != 0
3435 && strncmp (s->name, ".note", 5) == 0)
3437 amt = sizeof (struct elf_segment_map);
3438 m = bfd_zalloc (abfd, amt);
3442 m->p_type = PT_NOTE;
3449 if (s->flags & SEC_THREAD_LOCAL)
3457 /* If there are any SHF_TLS output sections, add PT_TLS segment. */
3462 amt = sizeof (struct elf_segment_map);
3463 amt += (tls_count - 1) * sizeof (asection *);
3464 m = bfd_zalloc (abfd, amt);
3469 m->count = tls_count;
3470 /* Mandated PF_R. */
3472 m->p_flags_valid = 1;
3473 for (i = 0; i < tls_count; ++i)
3475 BFD_ASSERT (first_tls->flags & SEC_THREAD_LOCAL);
3476 m->sections[i] = first_tls;
3477 first_tls = first_tls->next;
3484 /* If there is a .eh_frame_hdr section, throw in a PT_GNU_EH_FRAME
3486 eh_frame_hdr = elf_tdata (abfd)->eh_frame_hdr;
3487 if (eh_frame_hdr != NULL
3488 && (eh_frame_hdr->output_section->flags & SEC_LOAD) != 0)
3490 amt = sizeof (struct elf_segment_map);
3491 m = bfd_zalloc (abfd, amt);
3495 m->p_type = PT_GNU_EH_FRAME;
3497 m->sections[0] = eh_frame_hdr->output_section;
3503 if (elf_tdata (abfd)->stack_flags)
3505 amt = sizeof (struct elf_segment_map);
3506 m = bfd_zalloc (abfd, amt);
3510 m->p_type = PT_GNU_STACK;
3511 m->p_flags = elf_tdata (abfd)->stack_flags;
3512 m->p_flags_valid = 1;
3521 elf_tdata (abfd)->segment_map = mfirst;
3525 if (sections != NULL)
3530 /* Sort sections by address. */
3533 elf_sort_sections (const void *arg1, const void *arg2)
3535 const asection *sec1 = *(const asection **) arg1;
3536 const asection *sec2 = *(const asection **) arg2;
3537 bfd_size_type size1, size2;
3539 /* Sort by LMA first, since this is the address used to
3540 place the section into a segment. */
3541 if (sec1->lma < sec2->lma)
3543 else if (sec1->lma > sec2->lma)
3546 /* Then sort by VMA. Normally the LMA and the VMA will be
3547 the same, and this will do nothing. */
3548 if (sec1->vma < sec2->vma)
3550 else if (sec1->vma > sec2->vma)
3553 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
3555 #define TOEND(x) (((x)->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0)
3561 /* If the indicies are the same, do not return 0
3562 here, but continue to try the next comparison. */
3563 if (sec1->target_index - sec2->target_index != 0)
3564 return sec1->target_index - sec2->target_index;
3569 else if (TOEND (sec2))
3574 /* Sort by size, to put zero sized sections
3575 before others at the same address. */
3577 size1 = (sec1->flags & SEC_LOAD) ? sec1->_raw_size : 0;
3578 size2 = (sec2->flags & SEC_LOAD) ? sec2->_raw_size : 0;
3585 return sec1->target_index - sec2->target_index;
3588 /* Ian Lance Taylor writes:
3590 We shouldn't be using % with a negative signed number. That's just
3591 not good. We have to make sure either that the number is not
3592 negative, or that the number has an unsigned type. When the types
3593 are all the same size they wind up as unsigned. When file_ptr is a
3594 larger signed type, the arithmetic winds up as signed long long,
3597 What we're trying to say here is something like ``increase OFF by
3598 the least amount that will cause it to be equal to the VMA modulo
3600 /* In other words, something like:
3602 vma_offset = m->sections[0]->vma % bed->maxpagesize;
3603 off_offset = off % bed->maxpagesize;
3604 if (vma_offset < off_offset)
3605 adjustment = vma_offset + bed->maxpagesize - off_offset;
3607 adjustment = vma_offset - off_offset;
3609 which can can be collapsed into the expression below. */
3612 vma_page_aligned_bias (bfd_vma vma, ufile_ptr off, bfd_vma maxpagesize)
3614 return ((vma - off) % maxpagesize);
3617 /* Assign file positions to the sections based on the mapping from
3618 sections to segments. This function also sets up some fields in
3619 the file header, and writes out the program headers. */
3622 assign_file_positions_for_segments (bfd *abfd, struct bfd_link_info *link_info)
3624 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3626 struct elf_segment_map *m;
3628 Elf_Internal_Phdr *phdrs;
3630 bfd_vma filehdr_vaddr, filehdr_paddr;
3631 bfd_vma phdrs_vaddr, phdrs_paddr;
3632 Elf_Internal_Phdr *p;
3635 if (elf_tdata (abfd)->segment_map == NULL)
3637 if (! map_sections_to_segments (abfd))
3642 /* The placement algorithm assumes that non allocated sections are
3643 not in PT_LOAD segments. We ensure this here by removing such
3644 sections from the segment map. */
3645 for (m = elf_tdata (abfd)->segment_map;
3649 unsigned int new_count;
3652 if (m->p_type != PT_LOAD)
3656 for (i = 0; i < m->count; i ++)
3658 if ((m->sections[i]->flags & SEC_ALLOC) != 0)
3661 m->sections[new_count] = m->sections[i];
3667 if (new_count != m->count)
3668 m->count = new_count;
3672 if (bed->elf_backend_modify_segment_map)
3674 if (! (*bed->elf_backend_modify_segment_map) (abfd, link_info))
3679 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
3682 elf_elfheader (abfd)->e_phoff = bed->s->sizeof_ehdr;
3683 elf_elfheader (abfd)->e_phentsize = bed->s->sizeof_phdr;
3684 elf_elfheader (abfd)->e_phnum = count;
3689 /* If we already counted the number of program segments, make sure
3690 that we allocated enough space. This happens when SIZEOF_HEADERS
3691 is used in a linker script. */
3692 alloc = elf_tdata (abfd)->program_header_size / bed->s->sizeof_phdr;
3693 if (alloc != 0 && count > alloc)
3695 ((*_bfd_error_handler)
3696 (_("%s: Not enough room for program headers (allocated %u, need %u)"),
3697 bfd_get_filename (abfd), alloc, count));
3698 bfd_set_error (bfd_error_bad_value);
3705 amt = alloc * sizeof (Elf_Internal_Phdr);
3706 phdrs = bfd_alloc (abfd, amt);
3710 off = bed->s->sizeof_ehdr;
3711 off += alloc * bed->s->sizeof_phdr;
3718 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
3725 /* If elf_segment_map is not from map_sections_to_segments, the
3726 sections may not be correctly ordered. NOTE: sorting should
3727 not be done to the PT_NOTE section of a corefile, which may
3728 contain several pseudo-sections artificially created by bfd.
3729 Sorting these pseudo-sections breaks things badly. */
3731 && !(elf_elfheader (abfd)->e_type == ET_CORE
3732 && m->p_type == PT_NOTE))
3733 qsort (m->sections, (size_t) m->count, sizeof (asection *),
3736 p->p_type = m->p_type;
3737 p->p_flags = m->p_flags;
3739 if (p->p_type == PT_LOAD
3741 && (m->sections[0]->flags & SEC_ALLOC) != 0)
3743 if ((abfd->flags & D_PAGED) != 0)
3744 off += vma_page_aligned_bias (m->sections[0]->vma, off,
3748 bfd_size_type align;
3751 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
3753 bfd_size_type secalign;
3755 secalign = bfd_get_section_alignment (abfd, *secpp);
3756 if (secalign > align)
3760 off += vma_page_aligned_bias (m->sections[0]->vma, off,
3768 p->p_vaddr = m->sections[0]->vma;
3770 if (m->p_paddr_valid)
3771 p->p_paddr = m->p_paddr;
3772 else if (m->count == 0)
3775 p->p_paddr = m->sections[0]->lma;
3777 if (p->p_type == PT_LOAD
3778 && (abfd->flags & D_PAGED) != 0)
3779 p->p_align = bed->maxpagesize;
3780 else if (m->count == 0)
3781 p->p_align = 1 << bed->s->log_file_align;
3789 if (m->includes_filehdr)
3791 if (! m->p_flags_valid)
3794 p->p_filesz = bed->s->sizeof_ehdr;
3795 p->p_memsz = bed->s->sizeof_ehdr;
3798 BFD_ASSERT (p->p_type == PT_LOAD);
3800 if (p->p_vaddr < (bfd_vma) off)
3802 (*_bfd_error_handler)
3803 (_("%s: Not enough room for program headers, try linking with -N"),
3804 bfd_get_filename (abfd));
3805 bfd_set_error (bfd_error_bad_value);
3810 if (! m->p_paddr_valid)
3813 if (p->p_type == PT_LOAD)
3815 filehdr_vaddr = p->p_vaddr;
3816 filehdr_paddr = p->p_paddr;
3820 if (m->includes_phdrs)
3822 if (! m->p_flags_valid)
3825 if (m->includes_filehdr)
3827 if (p->p_type == PT_LOAD)
3829 phdrs_vaddr = p->p_vaddr + bed->s->sizeof_ehdr;
3830 phdrs_paddr = p->p_paddr + bed->s->sizeof_ehdr;
3835 p->p_offset = bed->s->sizeof_ehdr;
3839 BFD_ASSERT (p->p_type == PT_LOAD);
3840 p->p_vaddr -= off - p->p_offset;
3841 if (! m->p_paddr_valid)
3842 p->p_paddr -= off - p->p_offset;
3845 if (p->p_type == PT_LOAD)
3847 phdrs_vaddr = p->p_vaddr;
3848 phdrs_paddr = p->p_paddr;
3851 phdrs_vaddr = bed->maxpagesize + bed->s->sizeof_ehdr;
3854 p->p_filesz += alloc * bed->s->sizeof_phdr;
3855 p->p_memsz += alloc * bed->s->sizeof_phdr;
3858 if (p->p_type == PT_LOAD
3859 || (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core))
3861 if (! m->includes_filehdr && ! m->includes_phdrs)
3867 adjust = off - (p->p_offset + p->p_filesz);
3868 p->p_filesz += adjust;
3869 p->p_memsz += adjust;
3875 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
3879 bfd_size_type align;
3883 align = 1 << bfd_get_section_alignment (abfd, sec);
3885 /* The section may have artificial alignment forced by a
3886 link script. Notice this case by the gap between the
3887 cumulative phdr lma and the section's lma. */
3888 if (p->p_paddr + p->p_memsz < sec->lma)
3890 bfd_vma adjust = sec->lma - (p->p_paddr + p->p_memsz);
3892 p->p_memsz += adjust;
3893 if (p->p_type == PT_LOAD
3894 || (p->p_type == PT_NOTE
3895 && bfd_get_format (abfd) == bfd_core))
3900 if ((flags & SEC_LOAD) != 0
3901 || (flags & SEC_THREAD_LOCAL) != 0)
3902 p->p_filesz += adjust;
3905 if (p->p_type == PT_LOAD)
3907 bfd_signed_vma adjust;
3909 if ((flags & SEC_LOAD) != 0)
3911 adjust = sec->lma - (p->p_paddr + p->p_memsz);
3915 else if ((flags & SEC_ALLOC) != 0)
3917 /* The section VMA must equal the file position
3918 modulo the page size. FIXME: I'm not sure if
3919 this adjustment is really necessary. We used to
3920 not have the SEC_LOAD case just above, and then
3921 this was necessary, but now I'm not sure. */
3922 if ((abfd->flags & D_PAGED) != 0)
3923 adjust = vma_page_aligned_bias (sec->vma, voff,
3926 adjust = vma_page_aligned_bias (sec->vma, voff,
3936 (* _bfd_error_handler) (_("\
3937 Error: First section in segment (%s) starts at 0x%x whereas the segment starts at 0x%x"),
3938 bfd_section_name (abfd, sec),
3943 p->p_memsz += adjust;
3946 if ((flags & SEC_LOAD) != 0)
3947 p->p_filesz += adjust;
3952 /* We check SEC_HAS_CONTENTS here because if NOLOAD is
3953 used in a linker script we may have a section with
3954 SEC_LOAD clear but which is supposed to have
3956 if ((flags & SEC_LOAD) != 0
3957 || (flags & SEC_HAS_CONTENTS) != 0)
3958 off += sec->_raw_size;
3960 if ((flags & SEC_ALLOC) != 0
3961 && ((flags & SEC_LOAD) != 0
3962 || (flags & SEC_THREAD_LOCAL) == 0))
3963 voff += sec->_raw_size;
3966 if (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core)
3968 /* The actual "note" segment has i == 0.
3969 This is the one that actually contains everything. */
3973 p->p_filesz = sec->_raw_size;
3974 off += sec->_raw_size;
3979 /* Fake sections -- don't need to be written. */
3982 flags = sec->flags = 0;
3989 if ((sec->flags & SEC_LOAD) != 0
3990 || (sec->flags & SEC_THREAD_LOCAL) == 0
3991 || p->p_type == PT_TLS)
3992 p->p_memsz += sec->_raw_size;
3994 if ((flags & SEC_LOAD) != 0)
3995 p->p_filesz += sec->_raw_size;
3997 if (p->p_type == PT_TLS
3998 && sec->_raw_size == 0
3999 && (sec->flags & SEC_HAS_CONTENTS) == 0)
4001 struct bfd_link_order *o;
4002 bfd_vma tbss_size = 0;
4004 for (o = sec->link_order_head; o != NULL; o = o->next)
4005 if (tbss_size < o->offset + o->size)
4006 tbss_size = o->offset + o->size;
4008 p->p_memsz += tbss_size;
4011 if (align > p->p_align
4012 && (p->p_type != PT_LOAD || (abfd->flags & D_PAGED) == 0))
4016 if (! m->p_flags_valid)
4019 if ((flags & SEC_CODE) != 0)
4021 if ((flags & SEC_READONLY) == 0)
4027 /* Now that we have set the section file positions, we can set up
4028 the file positions for the non PT_LOAD segments. */
4029 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
4033 if (p->p_type != PT_LOAD && m->count > 0)
4035 BFD_ASSERT (! m->includes_filehdr && ! m->includes_phdrs);
4036 p->p_offset = m->sections[0]->filepos;
4040 if (m->includes_filehdr)
4042 p->p_vaddr = filehdr_vaddr;
4043 if (! m->p_paddr_valid)
4044 p->p_paddr = filehdr_paddr;
4046 else if (m->includes_phdrs)
4048 p->p_vaddr = phdrs_vaddr;
4049 if (! m->p_paddr_valid)
4050 p->p_paddr = phdrs_paddr;
4055 /* Clear out any program headers we allocated but did not use. */
4056 for (; count < alloc; count++, p++)
4058 memset (p, 0, sizeof *p);
4059 p->p_type = PT_NULL;
4062 elf_tdata (abfd)->phdr = phdrs;
4064 elf_tdata (abfd)->next_file_pos = off;
4066 /* Write out the program headers. */
4067 if (bfd_seek (abfd, (bfd_signed_vma) bed->s->sizeof_ehdr, SEEK_SET) != 0
4068 || bed->s->write_out_phdrs (abfd, phdrs, alloc) != 0)
4074 /* Get the size of the program header.
4076 If this is called by the linker before any of the section VMA's are set, it
4077 can't calculate the correct value for a strange memory layout. This only
4078 happens when SIZEOF_HEADERS is used in a linker script. In this case,
4079 SORTED_HDRS is NULL and we assume the normal scenario of one text and one
4080 data segment (exclusive of .interp and .dynamic).
4082 ??? User written scripts must either not use SIZEOF_HEADERS, or assume there
4083 will be two segments. */
4085 static bfd_size_type
4086 get_program_header_size (bfd *abfd)
4090 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4092 /* We can't return a different result each time we're called. */
4093 if (elf_tdata (abfd)->program_header_size != 0)
4094 return elf_tdata (abfd)->program_header_size;
4096 if (elf_tdata (abfd)->segment_map != NULL)
4098 struct elf_segment_map *m;
4101 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
4103 elf_tdata (abfd)->program_header_size = segs * bed->s->sizeof_phdr;
4104 return elf_tdata (abfd)->program_header_size;
4107 /* Assume we will need exactly two PT_LOAD segments: one for text
4108 and one for data. */
4111 s = bfd_get_section_by_name (abfd, ".interp");
4112 if (s != NULL && (s->flags & SEC_LOAD) != 0)
4114 /* If we have a loadable interpreter section, we need a
4115 PT_INTERP segment. In this case, assume we also need a
4116 PT_PHDR segment, although that may not be true for all
4121 if (bfd_get_section_by_name (abfd, ".dynamic") != NULL)
4123 /* We need a PT_DYNAMIC segment. */
4127 if (elf_tdata (abfd)->eh_frame_hdr)
4129 /* We need a PT_GNU_EH_FRAME segment. */
4133 if (elf_tdata (abfd)->stack_flags)
4135 /* We need a PT_GNU_STACK segment. */
4139 for (s = abfd->sections; s != NULL; s = s->next)
4141 if ((s->flags & SEC_LOAD) != 0
4142 && strncmp (s->name, ".note", 5) == 0)
4144 /* We need a PT_NOTE segment. */
4149 for (s = abfd->sections; s != NULL; s = s->next)
4151 if (s->flags & SEC_THREAD_LOCAL)
4153 /* We need a PT_TLS segment. */
4159 /* Let the backend count up any program headers it might need. */
4160 if (bed->elf_backend_additional_program_headers)
4164 a = (*bed->elf_backend_additional_program_headers) (abfd);
4170 elf_tdata (abfd)->program_header_size = segs * bed->s->sizeof_phdr;
4171 return elf_tdata (abfd)->program_header_size;
4174 /* Work out the file positions of all the sections. This is called by
4175 _bfd_elf_compute_section_file_positions. All the section sizes and
4176 VMAs must be known before this is called.
4178 We do not consider reloc sections at this point, unless they form
4179 part of the loadable image. Reloc sections are assigned file
4180 positions in assign_file_positions_for_relocs, which is called by
4181 write_object_contents and final_link.
4183 We also don't set the positions of the .symtab and .strtab here. */
4186 assign_file_positions_except_relocs (bfd *abfd,
4187 struct bfd_link_info *link_info)
4189 struct elf_obj_tdata * const tdata = elf_tdata (abfd);
4190 Elf_Internal_Ehdr * const i_ehdrp = elf_elfheader (abfd);
4191 Elf_Internal_Shdr ** const i_shdrpp = elf_elfsections (abfd);
4192 unsigned int num_sec = elf_numsections (abfd);
4194 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4196 if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0
4197 && bfd_get_format (abfd) != bfd_core)
4199 Elf_Internal_Shdr **hdrpp;
4202 /* Start after the ELF header. */
4203 off = i_ehdrp->e_ehsize;
4205 /* We are not creating an executable, which means that we are
4206 not creating a program header, and that the actual order of
4207 the sections in the file is unimportant. */
4208 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
4210 Elf_Internal_Shdr *hdr;
4213 if (hdr->sh_type == SHT_REL
4214 || hdr->sh_type == SHT_RELA
4215 || i == tdata->symtab_section
4216 || i == tdata->symtab_shndx_section
4217 || i == tdata->strtab_section)
4219 hdr->sh_offset = -1;
4222 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4224 if (i == SHN_LORESERVE - 1)
4226 i += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4227 hdrpp += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4234 Elf_Internal_Shdr **hdrpp;
4236 /* Assign file positions for the loaded sections based on the
4237 assignment of sections to segments. */
4238 if (! assign_file_positions_for_segments (abfd, link_info))
4241 /* Assign file positions for the other sections. */
4243 off = elf_tdata (abfd)->next_file_pos;
4244 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
4246 Elf_Internal_Shdr *hdr;
4249 if (hdr->bfd_section != NULL
4250 && hdr->bfd_section->filepos != 0)
4251 hdr->sh_offset = hdr->bfd_section->filepos;
4252 else if ((hdr->sh_flags & SHF_ALLOC) != 0)
4254 ((*_bfd_error_handler)
4255 (_("%s: warning: allocated section `%s' not in segment"),
4256 bfd_get_filename (abfd),
4257 (hdr->bfd_section == NULL
4259 : hdr->bfd_section->name)));
4260 if ((abfd->flags & D_PAGED) != 0)
4261 off += vma_page_aligned_bias (hdr->sh_addr, off,
4264 off += vma_page_aligned_bias (hdr->sh_addr, off,
4266 off = _bfd_elf_assign_file_position_for_section (hdr, off,
4269 else if (hdr->sh_type == SHT_REL
4270 || hdr->sh_type == SHT_RELA
4271 || hdr == i_shdrpp[tdata->symtab_section]
4272 || hdr == i_shdrpp[tdata->symtab_shndx_section]
4273 || hdr == i_shdrpp[tdata->strtab_section])
4274 hdr->sh_offset = -1;
4276 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4278 if (i == SHN_LORESERVE - 1)
4280 i += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4281 hdrpp += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4286 /* Place the section headers. */
4287 off = align_file_position (off, 1 << bed->s->log_file_align);
4288 i_ehdrp->e_shoff = off;
4289 off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize;
4291 elf_tdata (abfd)->next_file_pos = off;
4297 prep_headers (bfd *abfd)
4299 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
4300 Elf_Internal_Phdr *i_phdrp = 0; /* Program header table, internal form */
4301 Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */
4302 struct elf_strtab_hash *shstrtab;
4303 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4305 i_ehdrp = elf_elfheader (abfd);
4306 i_shdrp = elf_elfsections (abfd);
4308 shstrtab = _bfd_elf_strtab_init ();
4309 if (shstrtab == NULL)
4312 elf_shstrtab (abfd) = shstrtab;
4314 i_ehdrp->e_ident[EI_MAG0] = ELFMAG0;
4315 i_ehdrp->e_ident[EI_MAG1] = ELFMAG1;
4316 i_ehdrp->e_ident[EI_MAG2] = ELFMAG2;
4317 i_ehdrp->e_ident[EI_MAG3] = ELFMAG3;
4319 i_ehdrp->e_ident[EI_CLASS] = bed->s->elfclass;
4320 i_ehdrp->e_ident[EI_DATA] =
4321 bfd_big_endian (abfd) ? ELFDATA2MSB : ELFDATA2LSB;
4322 i_ehdrp->e_ident[EI_VERSION] = bed->s->ev_current;
4324 if ((abfd->flags & DYNAMIC) != 0)
4325 i_ehdrp->e_type = ET_DYN;
4326 else if ((abfd->flags & EXEC_P) != 0)
4327 i_ehdrp->e_type = ET_EXEC;
4328 else if (bfd_get_format (abfd) == bfd_core)
4329 i_ehdrp->e_type = ET_CORE;
4331 i_ehdrp->e_type = ET_REL;
4333 switch (bfd_get_arch (abfd))
4335 case bfd_arch_unknown:
4336 i_ehdrp->e_machine = EM_NONE;
4339 /* There used to be a long list of cases here, each one setting
4340 e_machine to the same EM_* macro #defined as ELF_MACHINE_CODE
4341 in the corresponding bfd definition. To avoid duplication,
4342 the switch was removed. Machines that need special handling
4343 can generally do it in elf_backend_final_write_processing(),
4344 unless they need the information earlier than the final write.
4345 Such need can generally be supplied by replacing the tests for
4346 e_machine with the conditions used to determine it. */
4348 i_ehdrp->e_machine = bed->elf_machine_code;
4351 i_ehdrp->e_version = bed->s->ev_current;
4352 i_ehdrp->e_ehsize = bed->s->sizeof_ehdr;
4354 /* No program header, for now. */
4355 i_ehdrp->e_phoff = 0;
4356 i_ehdrp->e_phentsize = 0;
4357 i_ehdrp->e_phnum = 0;
4359 /* Each bfd section is section header entry. */
4360 i_ehdrp->e_entry = bfd_get_start_address (abfd);
4361 i_ehdrp->e_shentsize = bed->s->sizeof_shdr;
4363 /* If we're building an executable, we'll need a program header table. */
4364 if (abfd->flags & EXEC_P)
4366 /* It all happens later. */
4368 i_ehdrp->e_phentsize = sizeof (Elf_External_Phdr);
4370 /* elf_build_phdrs() returns a (NULL-terminated) array of
4371 Elf_Internal_Phdrs. */
4372 i_phdrp = elf_build_phdrs (abfd, i_ehdrp, i_shdrp, &i_ehdrp->e_phnum);
4373 i_ehdrp->e_phoff = outbase;
4374 outbase += i_ehdrp->e_phentsize * i_ehdrp->e_phnum;
4379 i_ehdrp->e_phentsize = 0;
4381 i_ehdrp->e_phoff = 0;
4384 elf_tdata (abfd)->symtab_hdr.sh_name =
4385 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".symtab", FALSE);
4386 elf_tdata (abfd)->strtab_hdr.sh_name =
4387 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".strtab", FALSE);
4388 elf_tdata (abfd)->shstrtab_hdr.sh_name =
4389 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".shstrtab", FALSE);
4390 if (elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
4391 || elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
4392 || elf_tdata (abfd)->shstrtab_hdr.sh_name == (unsigned int) -1)
4398 /* Assign file positions for all the reloc sections which are not part
4399 of the loadable file image. */
4402 _bfd_elf_assign_file_positions_for_relocs (bfd *abfd)
4405 unsigned int i, num_sec;
4406 Elf_Internal_Shdr **shdrpp;
4408 off = elf_tdata (abfd)->next_file_pos;
4410 num_sec = elf_numsections (abfd);
4411 for (i = 1, shdrpp = elf_elfsections (abfd) + 1; i < num_sec; i++, shdrpp++)
4413 Elf_Internal_Shdr *shdrp;
4416 if ((shdrp->sh_type == SHT_REL || shdrp->sh_type == SHT_RELA)
4417 && shdrp->sh_offset == -1)
4418 off = _bfd_elf_assign_file_position_for_section (shdrp, off, TRUE);
4421 elf_tdata (abfd)->next_file_pos = off;
4425 _bfd_elf_write_object_contents (bfd *abfd)
4427 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4428 Elf_Internal_Ehdr *i_ehdrp;
4429 Elf_Internal_Shdr **i_shdrp;
4431 unsigned int count, num_sec;
4433 if (! abfd->output_has_begun
4434 && ! _bfd_elf_compute_section_file_positions (abfd, NULL))
4437 i_shdrp = elf_elfsections (abfd);
4438 i_ehdrp = elf_elfheader (abfd);
4441 bfd_map_over_sections (abfd, bed->s->write_relocs, &failed);
4445 _bfd_elf_assign_file_positions_for_relocs (abfd);
4447 /* After writing the headers, we need to write the sections too... */
4448 num_sec = elf_numsections (abfd);
4449 for (count = 1; count < num_sec; count++)
4451 if (bed->elf_backend_section_processing)
4452 (*bed->elf_backend_section_processing) (abfd, i_shdrp[count]);
4453 if (i_shdrp[count]->contents)
4455 bfd_size_type amt = i_shdrp[count]->sh_size;
4457 if (bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET) != 0
4458 || bfd_bwrite (i_shdrp[count]->contents, amt, abfd) != amt)
4461 if (count == SHN_LORESERVE - 1)
4462 count += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4465 /* Write out the section header names. */
4466 if (bfd_seek (abfd, elf_tdata (abfd)->shstrtab_hdr.sh_offset, SEEK_SET) != 0
4467 || ! _bfd_elf_strtab_emit (abfd, elf_shstrtab (abfd)))
4470 if (bed->elf_backend_final_write_processing)
4471 (*bed->elf_backend_final_write_processing) (abfd,
4472 elf_tdata (abfd)->linker);
4474 return bed->s->write_shdrs_and_ehdr (abfd);
4478 _bfd_elf_write_corefile_contents (bfd *abfd)
4480 /* Hopefully this can be done just like an object file. */
4481 return _bfd_elf_write_object_contents (abfd);
4484 /* Given a section, search the header to find them. */
4487 _bfd_elf_section_from_bfd_section (bfd *abfd, struct bfd_section *asect)
4489 const struct elf_backend_data *bed;
4492 if (elf_section_data (asect) != NULL
4493 && elf_section_data (asect)->this_idx != 0)
4494 return elf_section_data (asect)->this_idx;
4496 if (bfd_is_abs_section (asect))
4498 else if (bfd_is_com_section (asect))
4500 else if (bfd_is_und_section (asect))
4504 Elf_Internal_Shdr **i_shdrp = elf_elfsections (abfd);
4505 int maxindex = elf_numsections (abfd);
4507 for (index = 1; index < maxindex; index++)
4509 Elf_Internal_Shdr *hdr = i_shdrp[index];
4511 if (hdr != NULL && hdr->bfd_section == asect)
4517 bed = get_elf_backend_data (abfd);
4518 if (bed->elf_backend_section_from_bfd_section)
4522 if ((*bed->elf_backend_section_from_bfd_section) (abfd, asect, &retval))
4527 bfd_set_error (bfd_error_nonrepresentable_section);
4532 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
4536 _bfd_elf_symbol_from_bfd_symbol (bfd *abfd, asymbol **asym_ptr_ptr)
4538 asymbol *asym_ptr = *asym_ptr_ptr;
4540 flagword flags = asym_ptr->flags;
4542 /* When gas creates relocations against local labels, it creates its
4543 own symbol for the section, but does put the symbol into the
4544 symbol chain, so udata is 0. When the linker is generating
4545 relocatable output, this section symbol may be for one of the
4546 input sections rather than the output section. */
4547 if (asym_ptr->udata.i == 0
4548 && (flags & BSF_SECTION_SYM)
4549 && asym_ptr->section)
4553 if (asym_ptr->section->output_section != NULL)
4554 indx = asym_ptr->section->output_section->index;
4556 indx = asym_ptr->section->index;
4557 if (indx < elf_num_section_syms (abfd)
4558 && elf_section_syms (abfd)[indx] != NULL)
4559 asym_ptr->udata.i = elf_section_syms (abfd)[indx]->udata.i;
4562 idx = asym_ptr->udata.i;
4566 /* This case can occur when using --strip-symbol on a symbol
4567 which is used in a relocation entry. */
4568 (*_bfd_error_handler)
4569 (_("%s: symbol `%s' required but not present"),
4570 bfd_archive_filename (abfd), bfd_asymbol_name (asym_ptr));
4571 bfd_set_error (bfd_error_no_symbols);
4578 "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n",
4579 (long) asym_ptr, asym_ptr->name, idx, flags,
4580 elf_symbol_flags (flags));
4588 /* Copy private BFD data. This copies any program header information. */
4591 copy_private_bfd_data (bfd *ibfd, bfd *obfd)
4593 Elf_Internal_Ehdr *iehdr;
4594 struct elf_segment_map *map;
4595 struct elf_segment_map *map_first;
4596 struct elf_segment_map **pointer_to_map;
4597 Elf_Internal_Phdr *segment;
4600 unsigned int num_segments;
4601 bfd_boolean phdr_included = FALSE;
4602 bfd_vma maxpagesize;
4603 struct elf_segment_map *phdr_adjust_seg = NULL;
4604 unsigned int phdr_adjust_num = 0;
4605 const struct elf_backend_data *bed;
4607 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
4608 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
4611 if (elf_tdata (ibfd)->phdr == NULL)
4614 bed = get_elf_backend_data (ibfd);
4615 iehdr = elf_elfheader (ibfd);
4618 pointer_to_map = &map_first;
4620 num_segments = elf_elfheader (ibfd)->e_phnum;
4621 maxpagesize = get_elf_backend_data (obfd)->maxpagesize;
4623 /* Returns the end address of the segment + 1. */
4624 #define SEGMENT_END(segment, start) \
4625 (start + (segment->p_memsz > segment->p_filesz \
4626 ? segment->p_memsz : segment->p_filesz))
4628 #define SECTION_SIZE(section, segment) \
4629 (((section->flags & (SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) \
4630 != SEC_THREAD_LOCAL || segment->p_type == PT_TLS) \
4631 ? section->_raw_size : 0)
4633 /* Returns TRUE if the given section is contained within
4634 the given segment. VMA addresses are compared. */
4635 #define IS_CONTAINED_BY_VMA(section, segment) \
4636 (section->vma >= segment->p_vaddr \
4637 && (section->vma + SECTION_SIZE (section, segment) \
4638 <= (SEGMENT_END (segment, segment->p_vaddr))))
4640 /* Returns TRUE if the given section is contained within
4641 the given segment. LMA addresses are compared. */
4642 #define IS_CONTAINED_BY_LMA(section, segment, base) \
4643 (section->lma >= base \
4644 && (section->lma + SECTION_SIZE (section, segment) \
4645 <= SEGMENT_END (segment, base)))
4647 /* Special case: corefile "NOTE" section containing regs, prpsinfo etc. */
4648 #define IS_COREFILE_NOTE(p, s) \
4649 (p->p_type == PT_NOTE \
4650 && bfd_get_format (ibfd) == bfd_core \
4651 && s->vma == 0 && s->lma == 0 \
4652 && (bfd_vma) s->filepos >= p->p_offset \
4653 && ((bfd_vma) s->filepos + s->_raw_size \
4654 <= p->p_offset + p->p_filesz))
4656 /* The complicated case when p_vaddr is 0 is to handle the Solaris
4657 linker, which generates a PT_INTERP section with p_vaddr and
4658 p_memsz set to 0. */
4659 #define IS_SOLARIS_PT_INTERP(p, s) \
4661 && p->p_paddr == 0 \
4662 && p->p_memsz == 0 \
4663 && p->p_filesz > 0 \
4664 && (s->flags & SEC_HAS_CONTENTS) != 0 \
4665 && s->_raw_size > 0 \
4666 && (bfd_vma) s->filepos >= p->p_offset \
4667 && ((bfd_vma) s->filepos + s->_raw_size \
4668 <= p->p_offset + p->p_filesz))
4670 /* Decide if the given section should be included in the given segment.
4671 A section will be included if:
4672 1. It is within the address space of the segment -- we use the LMA
4673 if that is set for the segment and the VMA otherwise,
4674 2. It is an allocated segment,
4675 3. There is an output section associated with it,
4676 4. The section has not already been allocated to a previous segment.
4677 5. PT_GNU_STACK segments do not include any sections.
4678 6. PT_TLS segment includes only SHF_TLS sections.
4679 7. SHF_TLS sections are only in PT_TLS or PT_LOAD segments. */
4680 #define INCLUDE_SECTION_IN_SEGMENT(section, segment, bed) \
4681 ((((segment->p_paddr \
4682 ? IS_CONTAINED_BY_LMA (section, segment, segment->p_paddr) \
4683 : IS_CONTAINED_BY_VMA (section, segment)) \
4684 && (section->flags & SEC_ALLOC) != 0) \
4685 || IS_COREFILE_NOTE (segment, section)) \
4686 && section->output_section != NULL \
4687 && segment->p_type != PT_GNU_STACK \
4688 && (segment->p_type != PT_TLS \
4689 || (section->flags & SEC_THREAD_LOCAL)) \
4690 && (segment->p_type == PT_LOAD \
4691 || segment->p_type == PT_TLS \
4692 || (section->flags & SEC_THREAD_LOCAL) == 0) \
4693 && ! section->segment_mark)
4695 /* Returns TRUE iff seg1 starts after the end of seg2. */
4696 #define SEGMENT_AFTER_SEGMENT(seg1, seg2, field) \
4697 (seg1->field >= SEGMENT_END (seg2, seg2->field))
4699 /* Returns TRUE iff seg1 and seg2 overlap. Segments overlap iff both
4700 their VMA address ranges and their LMA address ranges overlap.
4701 It is possible to have overlapping VMA ranges without overlapping LMA
4702 ranges. RedBoot images for example can have both .data and .bss mapped
4703 to the same VMA range, but with the .data section mapped to a different
4705 #define SEGMENT_OVERLAPS(seg1, seg2) \
4706 ( !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_vaddr) \
4707 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_vaddr)) \
4708 && !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_paddr) \
4709 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_paddr)))
4711 /* Initialise the segment mark field. */
4712 for (section = ibfd->sections; section != NULL; section = section->next)
4713 section->segment_mark = FALSE;
4715 /* Scan through the segments specified in the program header
4716 of the input BFD. For this first scan we look for overlaps
4717 in the loadable segments. These can be created by weird
4718 parameters to objcopy. Also, fix some solaris weirdness. */
4719 for (i = 0, segment = elf_tdata (ibfd)->phdr;
4724 Elf_Internal_Phdr *segment2;
4726 if (segment->p_type == PT_INTERP)
4727 for (section = ibfd->sections; section; section = section->next)
4728 if (IS_SOLARIS_PT_INTERP (segment, section))
4730 /* Mininal change so that the normal section to segment
4731 assignment code will work. */
4732 segment->p_vaddr = section->vma;
4736 if (segment->p_type != PT_LOAD)
4739 /* Determine if this segment overlaps any previous segments. */
4740 for (j = 0, segment2 = elf_tdata (ibfd)->phdr; j < i; j++, segment2 ++)
4742 bfd_signed_vma extra_length;
4744 if (segment2->p_type != PT_LOAD
4745 || ! SEGMENT_OVERLAPS (segment, segment2))
4748 /* Merge the two segments together. */
4749 if (segment2->p_vaddr < segment->p_vaddr)
4751 /* Extend SEGMENT2 to include SEGMENT and then delete
4754 SEGMENT_END (segment, segment->p_vaddr)
4755 - SEGMENT_END (segment2, segment2->p_vaddr);
4757 if (extra_length > 0)
4759 segment2->p_memsz += extra_length;
4760 segment2->p_filesz += extra_length;
4763 segment->p_type = PT_NULL;
4765 /* Since we have deleted P we must restart the outer loop. */
4767 segment = elf_tdata (ibfd)->phdr;
4772 /* Extend SEGMENT to include SEGMENT2 and then delete
4775 SEGMENT_END (segment2, segment2->p_vaddr)
4776 - SEGMENT_END (segment, segment->p_vaddr);
4778 if (extra_length > 0)
4780 segment->p_memsz += extra_length;
4781 segment->p_filesz += extra_length;
4784 segment2->p_type = PT_NULL;
4789 /* The second scan attempts to assign sections to segments. */
4790 for (i = 0, segment = elf_tdata (ibfd)->phdr;
4794 unsigned int section_count;
4795 asection ** sections;
4796 asection * output_section;
4798 bfd_vma matching_lma;
4799 bfd_vma suggested_lma;
4803 if (segment->p_type == PT_NULL)
4806 /* Compute how many sections might be placed into this segment. */
4807 for (section = ibfd->sections, section_count = 0;
4809 section = section->next)
4810 if (INCLUDE_SECTION_IN_SEGMENT (section, segment, bed))
4813 /* Allocate a segment map big enough to contain
4814 all of the sections we have selected. */
4815 amt = sizeof (struct elf_segment_map);
4816 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
4817 map = bfd_alloc (obfd, amt);
4821 /* Initialise the fields of the segment map. Default to
4822 using the physical address of the segment in the input BFD. */
4824 map->p_type = segment->p_type;
4825 map->p_flags = segment->p_flags;
4826 map->p_flags_valid = 1;
4827 map->p_paddr = segment->p_paddr;
4828 map->p_paddr_valid = 1;
4830 /* Determine if this segment contains the ELF file header
4831 and if it contains the program headers themselves. */
4832 map->includes_filehdr = (segment->p_offset == 0
4833 && segment->p_filesz >= iehdr->e_ehsize);
4835 map->includes_phdrs = 0;
4837 if (! phdr_included || segment->p_type != PT_LOAD)
4839 map->includes_phdrs =
4840 (segment->p_offset <= (bfd_vma) iehdr->e_phoff
4841 && (segment->p_offset + segment->p_filesz
4842 >= ((bfd_vma) iehdr->e_phoff
4843 + iehdr->e_phnum * iehdr->e_phentsize)));
4845 if (segment->p_type == PT_LOAD && map->includes_phdrs)
4846 phdr_included = TRUE;
4849 if (section_count == 0)
4851 /* Special segments, such as the PT_PHDR segment, may contain
4852 no sections, but ordinary, loadable segments should contain
4853 something. They are allowed by the ELF spec however, so only
4854 a warning is produced. */
4855 if (segment->p_type == PT_LOAD)
4856 (*_bfd_error_handler)
4857 (_("%s: warning: Empty loadable segment detected, is this intentional ?\n"),
4858 bfd_archive_filename (ibfd));
4861 *pointer_to_map = map;
4862 pointer_to_map = &map->next;
4867 /* Now scan the sections in the input BFD again and attempt
4868 to add their corresponding output sections to the segment map.
4869 The problem here is how to handle an output section which has
4870 been moved (ie had its LMA changed). There are four possibilities:
4872 1. None of the sections have been moved.
4873 In this case we can continue to use the segment LMA from the
4876 2. All of the sections have been moved by the same amount.
4877 In this case we can change the segment's LMA to match the LMA
4878 of the first section.
4880 3. Some of the sections have been moved, others have not.
4881 In this case those sections which have not been moved can be
4882 placed in the current segment which will have to have its size,
4883 and possibly its LMA changed, and a new segment or segments will
4884 have to be created to contain the other sections.
4886 4. The sections have been moved, but not by the same amount.
4887 In this case we can change the segment's LMA to match the LMA
4888 of the first section and we will have to create a new segment
4889 or segments to contain the other sections.
4891 In order to save time, we allocate an array to hold the section
4892 pointers that we are interested in. As these sections get assigned
4893 to a segment, they are removed from this array. */
4895 /* Gcc 2.96 miscompiles this code on mips. Don't do casting here
4896 to work around this long long bug. */
4897 amt = section_count * sizeof (asection *);
4898 sections = bfd_malloc (amt);
4899 if (sections == NULL)
4902 /* Step One: Scan for segment vs section LMA conflicts.
4903 Also add the sections to the section array allocated above.
4904 Also add the sections to the current segment. In the common
4905 case, where the sections have not been moved, this means that
4906 we have completely filled the segment, and there is nothing
4912 for (j = 0, section = ibfd->sections;
4914 section = section->next)
4916 if (INCLUDE_SECTION_IN_SEGMENT (section, segment, bed))
4918 output_section = section->output_section;
4920 sections[j ++] = section;
4922 /* The Solaris native linker always sets p_paddr to 0.
4923 We try to catch that case here, and set it to the
4924 correct value. Note - some backends require that
4925 p_paddr be left as zero. */
4926 if (segment->p_paddr == 0
4927 && segment->p_vaddr != 0
4928 && (! bed->want_p_paddr_set_to_zero)
4930 && output_section->lma != 0
4931 && (output_section->vma == (segment->p_vaddr
4932 + (map->includes_filehdr
4935 + (map->includes_phdrs
4937 * iehdr->e_phentsize)
4939 map->p_paddr = segment->p_vaddr;
4941 /* Match up the physical address of the segment with the
4942 LMA address of the output section. */
4943 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
4944 || IS_COREFILE_NOTE (segment, section)
4945 || (bed->want_p_paddr_set_to_zero &&
4946 IS_CONTAINED_BY_VMA (output_section, segment))
4949 if (matching_lma == 0)
4950 matching_lma = output_section->lma;
4952 /* We assume that if the section fits within the segment
4953 then it does not overlap any other section within that
4955 map->sections[isec ++] = output_section;
4957 else if (suggested_lma == 0)
4958 suggested_lma = output_section->lma;
4962 BFD_ASSERT (j == section_count);
4964 /* Step Two: Adjust the physical address of the current segment,
4966 if (isec == section_count)
4968 /* All of the sections fitted within the segment as currently
4969 specified. This is the default case. Add the segment to
4970 the list of built segments and carry on to process the next
4971 program header in the input BFD. */
4972 map->count = section_count;
4973 *pointer_to_map = map;
4974 pointer_to_map = &map->next;
4981 if (matching_lma != 0)
4983 /* At least one section fits inside the current segment.
4984 Keep it, but modify its physical address to match the
4985 LMA of the first section that fitted. */
4986 map->p_paddr = matching_lma;
4990 /* None of the sections fitted inside the current segment.
4991 Change the current segment's physical address to match
4992 the LMA of the first section. */
4993 map->p_paddr = suggested_lma;
4996 /* Offset the segment physical address from the lma
4997 to allow for space taken up by elf headers. */
4998 if (map->includes_filehdr)
4999 map->p_paddr -= iehdr->e_ehsize;
5001 if (map->includes_phdrs)
5003 map->p_paddr -= iehdr->e_phnum * iehdr->e_phentsize;
5005 /* iehdr->e_phnum is just an estimate of the number
5006 of program headers that we will need. Make a note
5007 here of the number we used and the segment we chose
5008 to hold these headers, so that we can adjust the
5009 offset when we know the correct value. */
5010 phdr_adjust_num = iehdr->e_phnum;
5011 phdr_adjust_seg = map;
5015 /* Step Three: Loop over the sections again, this time assigning
5016 those that fit to the current segment and removing them from the
5017 sections array; but making sure not to leave large gaps. Once all
5018 possible sections have been assigned to the current segment it is
5019 added to the list of built segments and if sections still remain
5020 to be assigned, a new segment is constructed before repeating
5028 /* Fill the current segment with sections that fit. */
5029 for (j = 0; j < section_count; j++)
5031 section = sections[j];
5033 if (section == NULL)
5036 output_section = section->output_section;
5038 BFD_ASSERT (output_section != NULL);
5040 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
5041 || IS_COREFILE_NOTE (segment, section))
5043 if (map->count == 0)
5045 /* If the first section in a segment does not start at
5046 the beginning of the segment, then something is
5048 if (output_section->lma !=
5050 + (map->includes_filehdr ? iehdr->e_ehsize : 0)
5051 + (map->includes_phdrs
5052 ? iehdr->e_phnum * iehdr->e_phentsize
5058 asection * prev_sec;
5060 prev_sec = map->sections[map->count - 1];
5062 /* If the gap between the end of the previous section
5063 and the start of this section is more than
5064 maxpagesize then we need to start a new segment. */
5065 if ((BFD_ALIGN (prev_sec->lma + prev_sec->_raw_size,
5067 < BFD_ALIGN (output_section->lma, maxpagesize))
5068 || ((prev_sec->lma + prev_sec->_raw_size)
5069 > output_section->lma))
5071 if (suggested_lma == 0)
5072 suggested_lma = output_section->lma;
5078 map->sections[map->count++] = output_section;
5081 section->segment_mark = TRUE;
5083 else if (suggested_lma == 0)
5084 suggested_lma = output_section->lma;
5087 BFD_ASSERT (map->count > 0);
5089 /* Add the current segment to the list of built segments. */
5090 *pointer_to_map = map;
5091 pointer_to_map = &map->next;
5093 if (isec < section_count)
5095 /* We still have not allocated all of the sections to
5096 segments. Create a new segment here, initialise it
5097 and carry on looping. */
5098 amt = sizeof (struct elf_segment_map);
5099 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
5100 map = bfd_alloc (obfd, amt);
5107 /* Initialise the fields of the segment map. Set the physical
5108 physical address to the LMA of the first section that has
5109 not yet been assigned. */
5111 map->p_type = segment->p_type;
5112 map->p_flags = segment->p_flags;
5113 map->p_flags_valid = 1;
5114 map->p_paddr = suggested_lma;
5115 map->p_paddr_valid = 1;
5116 map->includes_filehdr = 0;
5117 map->includes_phdrs = 0;
5120 while (isec < section_count);
5125 /* The Solaris linker creates program headers in which all the
5126 p_paddr fields are zero. When we try to objcopy or strip such a
5127 file, we get confused. Check for this case, and if we find it
5128 reset the p_paddr_valid fields. */
5129 for (map = map_first; map != NULL; map = map->next)
5130 if (map->p_paddr != 0)
5133 for (map = map_first; map != NULL; map = map->next)
5134 map->p_paddr_valid = 0;
5136 elf_tdata (obfd)->segment_map = map_first;
5138 /* If we had to estimate the number of program headers that were
5139 going to be needed, then check our estimate now and adjust
5140 the offset if necessary. */
5141 if (phdr_adjust_seg != NULL)
5145 for (count = 0, map = map_first; map != NULL; map = map->next)
5148 if (count > phdr_adjust_num)
5149 phdr_adjust_seg->p_paddr
5150 -= (count - phdr_adjust_num) * iehdr->e_phentsize;
5154 /* Final Step: Sort the segments into ascending order of physical
5156 if (map_first != NULL)
5158 struct elf_segment_map *prev;
5161 for (map = map_first->next; map != NULL; prev = map, map = map->next)
5163 /* Yes I know - its a bubble sort.... */
5164 if (map->next != NULL && (map->next->p_paddr < map->p_paddr))
5166 /* Swap map and map->next. */
5167 prev->next = map->next;
5168 map->next = map->next->next;
5169 prev->next->next = map;
5180 #undef IS_CONTAINED_BY_VMA
5181 #undef IS_CONTAINED_BY_LMA
5182 #undef IS_COREFILE_NOTE
5183 #undef IS_SOLARIS_PT_INTERP
5184 #undef INCLUDE_SECTION_IN_SEGMENT
5185 #undef SEGMENT_AFTER_SEGMENT
5186 #undef SEGMENT_OVERLAPS
5190 /* Copy private section information. This copies over the entsize
5191 field, and sometimes the info field. */
5194 _bfd_elf_copy_private_section_data (bfd *ibfd,
5199 Elf_Internal_Shdr *ihdr, *ohdr;
5201 if (ibfd->xvec->flavour != bfd_target_elf_flavour
5202 || obfd->xvec->flavour != bfd_target_elf_flavour)
5205 if (elf_tdata (obfd)->segment_map == NULL && elf_tdata (ibfd)->phdr != NULL)
5209 /* Only set up the segments if there are no more SEC_ALLOC
5210 sections. FIXME: This won't do the right thing if objcopy is
5211 used to remove the last SEC_ALLOC section, since objcopy
5212 won't call this routine in that case. */
5213 for (s = isec->next; s != NULL; s = s->next)
5214 if ((s->flags & SEC_ALLOC) != 0)
5218 if (! copy_private_bfd_data (ibfd, obfd))
5223 ihdr = &elf_section_data (isec)->this_hdr;
5224 ohdr = &elf_section_data (osec)->this_hdr;
5226 ohdr->sh_entsize = ihdr->sh_entsize;
5228 if (ihdr->sh_type == SHT_SYMTAB
5229 || ihdr->sh_type == SHT_DYNSYM
5230 || ihdr->sh_type == SHT_GNU_verneed
5231 || ihdr->sh_type == SHT_GNU_verdef)
5232 ohdr->sh_info = ihdr->sh_info;
5234 /* Set things up for objcopy. The output SHT_GROUP section will
5235 have its elf_next_in_group pointing back to the input group
5237 elf_next_in_group (osec) = elf_next_in_group (isec);
5238 elf_group_name (osec) = elf_group_name (isec);
5240 osec->use_rela_p = isec->use_rela_p;
5245 /* Copy private symbol information. If this symbol is in a section
5246 which we did not map into a BFD section, try to map the section
5247 index correctly. We use special macro definitions for the mapped
5248 section indices; these definitions are interpreted by the
5249 swap_out_syms function. */
5251 #define MAP_ONESYMTAB (SHN_HIOS + 1)
5252 #define MAP_DYNSYMTAB (SHN_HIOS + 2)
5253 #define MAP_STRTAB (SHN_HIOS + 3)
5254 #define MAP_SHSTRTAB (SHN_HIOS + 4)
5255 #define MAP_SYM_SHNDX (SHN_HIOS + 5)
5258 _bfd_elf_copy_private_symbol_data (bfd *ibfd,
5263 elf_symbol_type *isym, *osym;
5265 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
5266 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
5269 isym = elf_symbol_from (ibfd, isymarg);
5270 osym = elf_symbol_from (obfd, osymarg);
5274 && bfd_is_abs_section (isym->symbol.section))
5278 shndx = isym->internal_elf_sym.st_shndx;
5279 if (shndx == elf_onesymtab (ibfd))
5280 shndx = MAP_ONESYMTAB;
5281 else if (shndx == elf_dynsymtab (ibfd))
5282 shndx = MAP_DYNSYMTAB;
5283 else if (shndx == elf_tdata (ibfd)->strtab_section)
5285 else if (shndx == elf_tdata (ibfd)->shstrtab_section)
5286 shndx = MAP_SHSTRTAB;
5287 else if (shndx == elf_tdata (ibfd)->symtab_shndx_section)
5288 shndx = MAP_SYM_SHNDX;
5289 osym->internal_elf_sym.st_shndx = shndx;
5295 /* Swap out the symbols. */
5298 swap_out_syms (bfd *abfd,
5299 struct bfd_strtab_hash **sttp,
5302 const struct elf_backend_data *bed;
5305 struct bfd_strtab_hash *stt;
5306 Elf_Internal_Shdr *symtab_hdr;
5307 Elf_Internal_Shdr *symtab_shndx_hdr;
5308 Elf_Internal_Shdr *symstrtab_hdr;
5309 char *outbound_syms;
5310 char *outbound_shndx;
5313 bfd_boolean name_local_sections;
5315 if (!elf_map_symbols (abfd))
5318 /* Dump out the symtabs. */
5319 stt = _bfd_elf_stringtab_init ();
5323 bed = get_elf_backend_data (abfd);
5324 symcount = bfd_get_symcount (abfd);
5325 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5326 symtab_hdr->sh_type = SHT_SYMTAB;
5327 symtab_hdr->sh_entsize = bed->s->sizeof_sym;
5328 symtab_hdr->sh_size = symtab_hdr->sh_entsize * (symcount + 1);
5329 symtab_hdr->sh_info = elf_num_locals (abfd) + 1;
5330 symtab_hdr->sh_addralign = 1 << bed->s->log_file_align;
5332 symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr;
5333 symstrtab_hdr->sh_type = SHT_STRTAB;
5335 amt = (bfd_size_type) (1 + symcount) * bed->s->sizeof_sym;
5336 outbound_syms = bfd_alloc (abfd, amt);
5337 if (outbound_syms == NULL)
5339 _bfd_stringtab_free (stt);
5342 symtab_hdr->contents = outbound_syms;
5344 outbound_shndx = NULL;
5345 symtab_shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
5346 if (symtab_shndx_hdr->sh_name != 0)
5348 amt = (bfd_size_type) (1 + symcount) * sizeof (Elf_External_Sym_Shndx);
5349 outbound_shndx = bfd_zalloc (abfd, amt);
5350 if (outbound_shndx == NULL)
5352 _bfd_stringtab_free (stt);
5356 symtab_shndx_hdr->contents = outbound_shndx;
5357 symtab_shndx_hdr->sh_type = SHT_SYMTAB_SHNDX;
5358 symtab_shndx_hdr->sh_size = amt;
5359 symtab_shndx_hdr->sh_addralign = sizeof (Elf_External_Sym_Shndx);
5360 symtab_shndx_hdr->sh_entsize = sizeof (Elf_External_Sym_Shndx);
5363 /* Now generate the data (for "contents"). */
5365 /* Fill in zeroth symbol and swap it out. */
5366 Elf_Internal_Sym sym;
5372 sym.st_shndx = SHN_UNDEF;
5373 bed->s->swap_symbol_out (abfd, &sym, outbound_syms, outbound_shndx);
5374 outbound_syms += bed->s->sizeof_sym;
5375 if (outbound_shndx != NULL)
5376 outbound_shndx += sizeof (Elf_External_Sym_Shndx);
5380 = (bed->elf_backend_name_local_section_symbols
5381 && bed->elf_backend_name_local_section_symbols (abfd));
5383 syms = bfd_get_outsymbols (abfd);
5384 for (idx = 0; idx < symcount; idx++)
5386 Elf_Internal_Sym sym;
5387 bfd_vma value = syms[idx]->value;
5388 elf_symbol_type *type_ptr;
5389 flagword flags = syms[idx]->flags;
5392 if (!name_local_sections
5393 && (flags & (BSF_SECTION_SYM | BSF_GLOBAL)) == BSF_SECTION_SYM)
5395 /* Local section symbols have no name. */
5400 sym.st_name = (unsigned long) _bfd_stringtab_add (stt,
5403 if (sym.st_name == (unsigned long) -1)
5405 _bfd_stringtab_free (stt);
5410 type_ptr = elf_symbol_from (abfd, syms[idx]);
5412 if ((flags & BSF_SECTION_SYM) == 0
5413 && bfd_is_com_section (syms[idx]->section))
5415 /* ELF common symbols put the alignment into the `value' field,
5416 and the size into the `size' field. This is backwards from
5417 how BFD handles it, so reverse it here. */
5418 sym.st_size = value;
5419 if (type_ptr == NULL
5420 || type_ptr->internal_elf_sym.st_value == 0)
5421 sym.st_value = value >= 16 ? 16 : (1 << bfd_log2 (value));
5423 sym.st_value = type_ptr->internal_elf_sym.st_value;
5424 sym.st_shndx = _bfd_elf_section_from_bfd_section
5425 (abfd, syms[idx]->section);
5429 asection *sec = syms[idx]->section;
5432 if (sec->output_section)
5434 value += sec->output_offset;
5435 sec = sec->output_section;
5438 /* Don't add in the section vma for relocatable output. */
5439 if (! relocatable_p)
5441 sym.st_value = value;
5442 sym.st_size = type_ptr ? type_ptr->internal_elf_sym.st_size : 0;
5444 if (bfd_is_abs_section (sec)
5446 && type_ptr->internal_elf_sym.st_shndx != 0)
5448 /* This symbol is in a real ELF section which we did
5449 not create as a BFD section. Undo the mapping done
5450 by copy_private_symbol_data. */
5451 shndx = type_ptr->internal_elf_sym.st_shndx;
5455 shndx = elf_onesymtab (abfd);
5458 shndx = elf_dynsymtab (abfd);
5461 shndx = elf_tdata (abfd)->strtab_section;
5464 shndx = elf_tdata (abfd)->shstrtab_section;
5467 shndx = elf_tdata (abfd)->symtab_shndx_section;
5475 shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
5481 /* Writing this would be a hell of a lot easier if
5482 we had some decent documentation on bfd, and
5483 knew what to expect of the library, and what to
5484 demand of applications. For example, it
5485 appears that `objcopy' might not set the
5486 section of a symbol to be a section that is
5487 actually in the output file. */
5488 sec2 = bfd_get_section_by_name (abfd, sec->name);
5491 _bfd_error_handler (_("\
5492 Unable to find equivalent output section for symbol '%s' from section '%s'"),
5493 syms[idx]->name ? syms[idx]->name : "<Local sym>",
5495 bfd_set_error (bfd_error_invalid_operation);
5496 _bfd_stringtab_free (stt);
5500 shndx = _bfd_elf_section_from_bfd_section (abfd, sec2);
5501 BFD_ASSERT (shndx != -1);
5505 sym.st_shndx = shndx;
5508 if ((flags & BSF_THREAD_LOCAL) != 0)
5510 else if ((flags & BSF_FUNCTION) != 0)
5512 else if ((flags & BSF_OBJECT) != 0)
5517 if (syms[idx]->section->flags & SEC_THREAD_LOCAL)
5520 /* Processor-specific types. */
5521 if (type_ptr != NULL
5522 && bed->elf_backend_get_symbol_type)
5523 type = ((*bed->elf_backend_get_symbol_type)
5524 (&type_ptr->internal_elf_sym, type));
5526 if (flags & BSF_SECTION_SYM)
5528 if (flags & BSF_GLOBAL)
5529 sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION);
5531 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
5533 else if (bfd_is_com_section (syms[idx]->section))
5534 sym.st_info = ELF_ST_INFO (STB_GLOBAL, type);
5535 else if (bfd_is_und_section (syms[idx]->section))
5536 sym.st_info = ELF_ST_INFO (((flags & BSF_WEAK)
5540 else if (flags & BSF_FILE)
5541 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE);
5544 int bind = STB_LOCAL;
5546 if (flags & BSF_LOCAL)
5548 else if (flags & BSF_WEAK)
5550 else if (flags & BSF_GLOBAL)
5553 sym.st_info = ELF_ST_INFO (bind, type);
5556 if (type_ptr != NULL)
5557 sym.st_other = type_ptr->internal_elf_sym.st_other;
5561 bed->s->swap_symbol_out (abfd, &sym, outbound_syms, outbound_shndx);
5562 outbound_syms += bed->s->sizeof_sym;
5563 if (outbound_shndx != NULL)
5564 outbound_shndx += sizeof (Elf_External_Sym_Shndx);
5568 symstrtab_hdr->sh_size = _bfd_stringtab_size (stt);
5569 symstrtab_hdr->sh_type = SHT_STRTAB;
5571 symstrtab_hdr->sh_flags = 0;
5572 symstrtab_hdr->sh_addr = 0;
5573 symstrtab_hdr->sh_entsize = 0;
5574 symstrtab_hdr->sh_link = 0;
5575 symstrtab_hdr->sh_info = 0;
5576 symstrtab_hdr->sh_addralign = 1;
5581 /* Return the number of bytes required to hold the symtab vector.
5583 Note that we base it on the count plus 1, since we will null terminate
5584 the vector allocated based on this size. However, the ELF symbol table
5585 always has a dummy entry as symbol #0, so it ends up even. */
5588 _bfd_elf_get_symtab_upper_bound (bfd *abfd)
5592 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->symtab_hdr;
5594 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
5595 symtab_size = (symcount + 1) * (sizeof (asymbol *));
5597 symtab_size -= sizeof (asymbol *);
5603 _bfd_elf_get_dynamic_symtab_upper_bound (bfd *abfd)
5607 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->dynsymtab_hdr;
5609 if (elf_dynsymtab (abfd) == 0)
5611 bfd_set_error (bfd_error_invalid_operation);
5615 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
5616 symtab_size = (symcount + 1) * (sizeof (asymbol *));
5618 symtab_size -= sizeof (asymbol *);
5624 _bfd_elf_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED,
5627 return (asect->reloc_count + 1) * sizeof (arelent *);
5630 /* Canonicalize the relocs. */
5633 _bfd_elf_canonicalize_reloc (bfd *abfd,
5640 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5642 if (! bed->s->slurp_reloc_table (abfd, section, symbols, FALSE))
5645 tblptr = section->relocation;
5646 for (i = 0; i < section->reloc_count; i++)
5647 *relptr++ = tblptr++;
5651 return section->reloc_count;
5655 _bfd_elf_canonicalize_symtab (bfd *abfd, asymbol **allocation)
5657 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5658 long symcount = bed->s->slurp_symbol_table (abfd, allocation, FALSE);
5661 bfd_get_symcount (abfd) = symcount;
5666 _bfd_elf_canonicalize_dynamic_symtab (bfd *abfd,
5667 asymbol **allocation)
5669 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5670 long symcount = bed->s->slurp_symbol_table (abfd, allocation, TRUE);
5673 bfd_get_dynamic_symcount (abfd) = symcount;
5677 /* Return the size required for the dynamic reloc entries. Any
5678 section that was actually installed in the BFD, and has type
5679 SHT_REL or SHT_RELA, and uses the dynamic symbol table, is
5680 considered to be a dynamic reloc section. */
5683 _bfd_elf_get_dynamic_reloc_upper_bound (bfd *abfd)
5688 if (elf_dynsymtab (abfd) == 0)
5690 bfd_set_error (bfd_error_invalid_operation);
5694 ret = sizeof (arelent *);
5695 for (s = abfd->sections; s != NULL; s = s->next)
5696 if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
5697 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
5698 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
5699 ret += ((s->_raw_size / elf_section_data (s)->this_hdr.sh_entsize)
5700 * sizeof (arelent *));
5705 /* Canonicalize the dynamic relocation entries. Note that we return
5706 the dynamic relocations as a single block, although they are
5707 actually associated with particular sections; the interface, which
5708 was designed for SunOS style shared libraries, expects that there
5709 is only one set of dynamic relocs. Any section that was actually
5710 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses
5711 the dynamic symbol table, is considered to be a dynamic reloc
5715 _bfd_elf_canonicalize_dynamic_reloc (bfd *abfd,
5719 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
5723 if (elf_dynsymtab (abfd) == 0)
5725 bfd_set_error (bfd_error_invalid_operation);
5729 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
5731 for (s = abfd->sections; s != NULL; s = s->next)
5733 if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
5734 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
5735 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
5740 if (! (*slurp_relocs) (abfd, s, syms, TRUE))
5742 count = s->_raw_size / elf_section_data (s)->this_hdr.sh_entsize;
5744 for (i = 0; i < count; i++)
5755 /* Read in the version information. */
5758 _bfd_elf_slurp_version_tables (bfd *abfd)
5760 bfd_byte *contents = NULL;
5763 if (elf_dynverdef (abfd) != 0)
5765 Elf_Internal_Shdr *hdr;
5766 Elf_External_Verdef *everdef;
5767 Elf_Internal_Verdef *iverdef;
5768 Elf_Internal_Verdef *iverdefarr;
5769 Elf_Internal_Verdef iverdefmem;
5771 unsigned int maxidx;
5773 hdr = &elf_tdata (abfd)->dynverdef_hdr;
5775 contents = bfd_malloc (hdr->sh_size);
5776 if (contents == NULL)
5778 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
5779 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size)
5782 /* We know the number of entries in the section but not the maximum
5783 index. Therefore we have to run through all entries and find
5785 everdef = (Elf_External_Verdef *) contents;
5787 for (i = 0; i < hdr->sh_info; ++i)
5789 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
5791 if ((iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION)) > maxidx)
5792 maxidx = iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION);
5794 everdef = ((Elf_External_Verdef *)
5795 ((bfd_byte *) everdef + iverdefmem.vd_next));
5798 amt = (bfd_size_type) maxidx * sizeof (Elf_Internal_Verdef);
5799 elf_tdata (abfd)->verdef = bfd_zalloc (abfd, amt);
5800 if (elf_tdata (abfd)->verdef == NULL)
5803 elf_tdata (abfd)->cverdefs = maxidx;
5805 everdef = (Elf_External_Verdef *) contents;
5806 iverdefarr = elf_tdata (abfd)->verdef;
5807 for (i = 0; i < hdr->sh_info; i++)
5809 Elf_External_Verdaux *everdaux;
5810 Elf_Internal_Verdaux *iverdaux;
5813 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
5815 iverdef = &iverdefarr[(iverdefmem.vd_ndx & VERSYM_VERSION) - 1];
5816 memcpy (iverdef, &iverdefmem, sizeof (Elf_Internal_Verdef));
5818 iverdef->vd_bfd = abfd;
5820 amt = (bfd_size_type) iverdef->vd_cnt * sizeof (Elf_Internal_Verdaux);
5821 iverdef->vd_auxptr = bfd_alloc (abfd, amt);
5822 if (iverdef->vd_auxptr == NULL)
5825 everdaux = ((Elf_External_Verdaux *)
5826 ((bfd_byte *) everdef + iverdef->vd_aux));
5827 iverdaux = iverdef->vd_auxptr;
5828 for (j = 0; j < iverdef->vd_cnt; j++, iverdaux++)
5830 _bfd_elf_swap_verdaux_in (abfd, everdaux, iverdaux);
5832 iverdaux->vda_nodename =
5833 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
5834 iverdaux->vda_name);
5835 if (iverdaux->vda_nodename == NULL)
5838 if (j + 1 < iverdef->vd_cnt)
5839 iverdaux->vda_nextptr = iverdaux + 1;
5841 iverdaux->vda_nextptr = NULL;
5843 everdaux = ((Elf_External_Verdaux *)
5844 ((bfd_byte *) everdaux + iverdaux->vda_next));
5847 iverdef->vd_nodename = iverdef->vd_auxptr->vda_nodename;
5849 if (i + 1 < hdr->sh_info)
5850 iverdef->vd_nextdef = iverdef + 1;
5852 iverdef->vd_nextdef = NULL;
5854 everdef = ((Elf_External_Verdef *)
5855 ((bfd_byte *) everdef + iverdef->vd_next));
5862 if (elf_dynverref (abfd) != 0)
5864 Elf_Internal_Shdr *hdr;
5865 Elf_External_Verneed *everneed;
5866 Elf_Internal_Verneed *iverneed;
5869 hdr = &elf_tdata (abfd)->dynverref_hdr;
5871 amt = (bfd_size_type) hdr->sh_info * sizeof (Elf_Internal_Verneed);
5872 elf_tdata (abfd)->verref = bfd_zalloc (abfd, amt);
5873 if (elf_tdata (abfd)->verref == NULL)
5876 elf_tdata (abfd)->cverrefs = hdr->sh_info;
5878 contents = bfd_malloc (hdr->sh_size);
5879 if (contents == NULL)
5881 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
5882 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size)
5885 everneed = (Elf_External_Verneed *) contents;
5886 iverneed = elf_tdata (abfd)->verref;
5887 for (i = 0; i < hdr->sh_info; i++, iverneed++)
5889 Elf_External_Vernaux *evernaux;
5890 Elf_Internal_Vernaux *ivernaux;
5893 _bfd_elf_swap_verneed_in (abfd, everneed, iverneed);
5895 iverneed->vn_bfd = abfd;
5897 iverneed->vn_filename =
5898 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
5900 if (iverneed->vn_filename == NULL)
5903 amt = iverneed->vn_cnt;
5904 amt *= sizeof (Elf_Internal_Vernaux);
5905 iverneed->vn_auxptr = bfd_alloc (abfd, amt);
5907 evernaux = ((Elf_External_Vernaux *)
5908 ((bfd_byte *) everneed + iverneed->vn_aux));
5909 ivernaux = iverneed->vn_auxptr;
5910 for (j = 0; j < iverneed->vn_cnt; j++, ivernaux++)
5912 _bfd_elf_swap_vernaux_in (abfd, evernaux, ivernaux);
5914 ivernaux->vna_nodename =
5915 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
5916 ivernaux->vna_name);
5917 if (ivernaux->vna_nodename == NULL)
5920 if (j + 1 < iverneed->vn_cnt)
5921 ivernaux->vna_nextptr = ivernaux + 1;
5923 ivernaux->vna_nextptr = NULL;
5925 evernaux = ((Elf_External_Vernaux *)
5926 ((bfd_byte *) evernaux + ivernaux->vna_next));
5929 if (i + 1 < hdr->sh_info)
5930 iverneed->vn_nextref = iverneed + 1;
5932 iverneed->vn_nextref = NULL;
5934 everneed = ((Elf_External_Verneed *)
5935 ((bfd_byte *) everneed + iverneed->vn_next));
5945 if (contents != NULL)
5951 _bfd_elf_make_empty_symbol (bfd *abfd)
5953 elf_symbol_type *newsym;
5954 bfd_size_type amt = sizeof (elf_symbol_type);
5956 newsym = bfd_zalloc (abfd, amt);
5961 newsym->symbol.the_bfd = abfd;
5962 return &newsym->symbol;
5967 _bfd_elf_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED,
5971 bfd_symbol_info (symbol, ret);
5974 /* Return whether a symbol name implies a local symbol. Most targets
5975 use this function for the is_local_label_name entry point, but some
5979 _bfd_elf_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED,
5982 /* Normal local symbols start with ``.L''. */
5983 if (name[0] == '.' && name[1] == 'L')
5986 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
5987 DWARF debugging symbols starting with ``..''. */
5988 if (name[0] == '.' && name[1] == '.')
5991 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
5992 emitting DWARF debugging output. I suspect this is actually a
5993 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
5994 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
5995 underscore to be emitted on some ELF targets). For ease of use,
5996 we treat such symbols as local. */
5997 if (name[0] == '_' && name[1] == '.' && name[2] == 'L' && name[3] == '_')
6004 _bfd_elf_get_lineno (bfd *abfd ATTRIBUTE_UNUSED,
6005 asymbol *symbol ATTRIBUTE_UNUSED)
6012 _bfd_elf_set_arch_mach (bfd *abfd,
6013 enum bfd_architecture arch,
6014 unsigned long machine)
6016 /* If this isn't the right architecture for this backend, and this
6017 isn't the generic backend, fail. */
6018 if (arch != get_elf_backend_data (abfd)->arch
6019 && arch != bfd_arch_unknown
6020 && get_elf_backend_data (abfd)->arch != bfd_arch_unknown)
6023 return bfd_default_set_arch_mach (abfd, arch, machine);
6026 /* Find the function to a particular section and offset,
6027 for error reporting. */
6030 elf_find_function (bfd *abfd ATTRIBUTE_UNUSED,
6034 const char **filename_ptr,
6035 const char **functionname_ptr)
6037 const char *filename;
6046 for (p = symbols; *p != NULL; p++)
6050 q = (elf_symbol_type *) *p;
6052 if (bfd_get_section (&q->symbol) != section)
6055 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
6060 filename = bfd_asymbol_name (&q->symbol);
6064 if (q->symbol.section == section
6065 && q->symbol.value >= low_func
6066 && q->symbol.value <= offset)
6068 func = (asymbol *) q;
6069 low_func = q->symbol.value;
6079 *filename_ptr = filename;
6080 if (functionname_ptr)
6081 *functionname_ptr = bfd_asymbol_name (func);
6086 /* Find the nearest line to a particular section and offset,
6087 for error reporting. */
6090 _bfd_elf_find_nearest_line (bfd *abfd,
6094 const char **filename_ptr,
6095 const char **functionname_ptr,
6096 unsigned int *line_ptr)
6100 if (_bfd_dwarf1_find_nearest_line (abfd, section, symbols, offset,
6101 filename_ptr, functionname_ptr,
6104 if (!*functionname_ptr)
6105 elf_find_function (abfd, section, symbols, offset,
6106 *filename_ptr ? NULL : filename_ptr,
6112 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
6113 filename_ptr, functionname_ptr,
6115 &elf_tdata (abfd)->dwarf2_find_line_info))
6117 if (!*functionname_ptr)
6118 elf_find_function (abfd, section, symbols, offset,
6119 *filename_ptr ? NULL : filename_ptr,
6125 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
6126 &found, filename_ptr,
6127 functionname_ptr, line_ptr,
6128 &elf_tdata (abfd)->line_info))
6130 if (found && (*functionname_ptr || *line_ptr))
6133 if (symbols == NULL)
6136 if (! elf_find_function (abfd, section, symbols, offset,
6137 filename_ptr, functionname_ptr))
6145 _bfd_elf_sizeof_headers (bfd *abfd, bfd_boolean reloc)
6149 ret = get_elf_backend_data (abfd)->s->sizeof_ehdr;
6151 ret += get_program_header_size (abfd);
6156 _bfd_elf_set_section_contents (bfd *abfd,
6158 const void *location,
6160 bfd_size_type count)
6162 Elf_Internal_Shdr *hdr;
6165 if (! abfd->output_has_begun
6166 && ! _bfd_elf_compute_section_file_positions (abfd, NULL))
6169 hdr = &elf_section_data (section)->this_hdr;
6170 pos = hdr->sh_offset + offset;
6171 if (bfd_seek (abfd, pos, SEEK_SET) != 0
6172 || bfd_bwrite (location, count, abfd) != count)
6179 _bfd_elf_no_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
6180 arelent *cache_ptr ATTRIBUTE_UNUSED,
6181 Elf_Internal_Rela *dst ATTRIBUTE_UNUSED)
6186 /* Try to convert a non-ELF reloc into an ELF one. */
6189 _bfd_elf_validate_reloc (bfd *abfd, arelent *areloc)
6191 /* Check whether we really have an ELF howto. */
6193 if ((*areloc->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec)
6195 bfd_reloc_code_real_type code;
6196 reloc_howto_type *howto;
6198 /* Alien reloc: Try to determine its type to replace it with an
6199 equivalent ELF reloc. */
6201 if (areloc->howto->pc_relative)
6203 switch (areloc->howto->bitsize)
6206 code = BFD_RELOC_8_PCREL;
6209 code = BFD_RELOC_12_PCREL;
6212 code = BFD_RELOC_16_PCREL;
6215 code = BFD_RELOC_24_PCREL;
6218 code = BFD_RELOC_32_PCREL;
6221 code = BFD_RELOC_64_PCREL;
6227 howto = bfd_reloc_type_lookup (abfd, code);
6229 if (areloc->howto->pcrel_offset != howto->pcrel_offset)
6231 if (howto->pcrel_offset)
6232 areloc->addend += areloc->address;
6234 areloc->addend -= areloc->address; /* addend is unsigned!! */
6239 switch (areloc->howto->bitsize)
6245 code = BFD_RELOC_14;
6248 code = BFD_RELOC_16;
6251 code = BFD_RELOC_26;
6254 code = BFD_RELOC_32;
6257 code = BFD_RELOC_64;
6263 howto = bfd_reloc_type_lookup (abfd, code);
6267 areloc->howto = howto;
6275 (*_bfd_error_handler)
6276 (_("%s: unsupported relocation type %s"),
6277 bfd_archive_filename (abfd), areloc->howto->name);
6278 bfd_set_error (bfd_error_bad_value);
6283 _bfd_elf_close_and_cleanup (bfd *abfd)
6285 if (bfd_get_format (abfd) == bfd_object)
6287 if (elf_shstrtab (abfd) != NULL)
6288 _bfd_elf_strtab_free (elf_shstrtab (abfd));
6291 return _bfd_generic_close_and_cleanup (abfd);
6294 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
6295 in the relocation's offset. Thus we cannot allow any sort of sanity
6296 range-checking to interfere. There is nothing else to do in processing
6299 bfd_reloc_status_type
6300 _bfd_elf_rel_vtable_reloc_fn
6301 (bfd *abfd ATTRIBUTE_UNUSED, arelent *re ATTRIBUTE_UNUSED,
6302 struct bfd_symbol *symbol ATTRIBUTE_UNUSED,
6303 void *data ATTRIBUTE_UNUSED, asection *is ATTRIBUTE_UNUSED,
6304 bfd *obfd ATTRIBUTE_UNUSED, char **errmsg ATTRIBUTE_UNUSED)
6306 return bfd_reloc_ok;
6309 /* Elf core file support. Much of this only works on native
6310 toolchains, since we rely on knowing the
6311 machine-dependent procfs structure in order to pick
6312 out details about the corefile. */
6314 #ifdef HAVE_SYS_PROCFS_H
6315 # include <sys/procfs.h>
6318 /* FIXME: this is kinda wrong, but it's what gdb wants. */
6321 elfcore_make_pid (bfd *abfd)
6323 return ((elf_tdata (abfd)->core_lwpid << 16)
6324 + (elf_tdata (abfd)->core_pid));
6327 /* If there isn't a section called NAME, make one, using
6328 data from SECT. Note, this function will generate a
6329 reference to NAME, so you shouldn't deallocate or
6333 elfcore_maybe_make_sect (bfd *abfd, char *name, asection *sect)
6337 if (bfd_get_section_by_name (abfd, name) != NULL)
6340 sect2 = bfd_make_section (abfd, name);
6344 sect2->_raw_size = sect->_raw_size;
6345 sect2->filepos = sect->filepos;
6346 sect2->flags = sect->flags;
6347 sect2->alignment_power = sect->alignment_power;
6351 /* Create a pseudosection containing SIZE bytes at FILEPOS. This
6352 actually creates up to two pseudosections:
6353 - For the single-threaded case, a section named NAME, unless
6354 such a section already exists.
6355 - For the multi-threaded case, a section named "NAME/PID", where
6356 PID is elfcore_make_pid (abfd).
6357 Both pseudosections have identical contents. */
6359 _bfd_elfcore_make_pseudosection (bfd *abfd,
6365 char *threaded_name;
6369 /* Build the section name. */
6371 sprintf (buf, "%s/%d", name, elfcore_make_pid (abfd));
6372 len = strlen (buf) + 1;
6373 threaded_name = bfd_alloc (abfd, len);
6374 if (threaded_name == NULL)
6376 memcpy (threaded_name, buf, len);
6378 sect = bfd_make_section_anyway (abfd, threaded_name);
6381 sect->_raw_size = size;
6382 sect->filepos = filepos;
6383 sect->flags = SEC_HAS_CONTENTS;
6384 sect->alignment_power = 2;
6386 return elfcore_maybe_make_sect (abfd, name, sect);
6389 /* prstatus_t exists on:
6391 linux 2.[01] + glibc
6395 #if defined (HAVE_PRSTATUS_T)
6398 elfcore_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
6403 if (note->descsz == sizeof (prstatus_t))
6407 raw_size = sizeof (prstat.pr_reg);
6408 offset = offsetof (prstatus_t, pr_reg);
6409 memcpy (&prstat, note->descdata, sizeof (prstat));
6411 /* Do not overwrite the core signal if it
6412 has already been set by another thread. */
6413 if (elf_tdata (abfd)->core_signal == 0)
6414 elf_tdata (abfd)->core_signal = prstat.pr_cursig;
6415 elf_tdata (abfd)->core_pid = prstat.pr_pid;
6417 /* pr_who exists on:
6420 pr_who doesn't exist on:
6423 #if defined (HAVE_PRSTATUS_T_PR_WHO)
6424 elf_tdata (abfd)->core_lwpid = prstat.pr_who;
6427 #if defined (HAVE_PRSTATUS32_T)
6428 else if (note->descsz == sizeof (prstatus32_t))
6430 /* 64-bit host, 32-bit corefile */
6431 prstatus32_t prstat;
6433 raw_size = sizeof (prstat.pr_reg);
6434 offset = offsetof (prstatus32_t, pr_reg);
6435 memcpy (&prstat, note->descdata, sizeof (prstat));
6437 /* Do not overwrite the core signal if it
6438 has already been set by another thread. */
6439 if (elf_tdata (abfd)->core_signal == 0)
6440 elf_tdata (abfd)->core_signal = prstat.pr_cursig;
6441 elf_tdata (abfd)->core_pid = prstat.pr_pid;
6443 /* pr_who exists on:
6446 pr_who doesn't exist on:
6449 #if defined (HAVE_PRSTATUS32_T_PR_WHO)
6450 elf_tdata (abfd)->core_lwpid = prstat.pr_who;
6453 #endif /* HAVE_PRSTATUS32_T */
6456 /* Fail - we don't know how to handle any other
6457 note size (ie. data object type). */
6461 /* Make a ".reg/999" section and a ".reg" section. */
6462 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
6463 raw_size, note->descpos + offset);
6465 #endif /* defined (HAVE_PRSTATUS_T) */
6467 /* Create a pseudosection containing the exact contents of NOTE. */
6469 elfcore_make_note_pseudosection (bfd *abfd,
6471 Elf_Internal_Note *note)
6473 return _bfd_elfcore_make_pseudosection (abfd, name,
6474 note->descsz, note->descpos);
6477 /* There isn't a consistent prfpregset_t across platforms,
6478 but it doesn't matter, because we don't have to pick this
6479 data structure apart. */
6482 elfcore_grok_prfpreg (bfd *abfd, Elf_Internal_Note *note)
6484 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
6487 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
6488 type of 5 (NT_PRXFPREG). Just include the whole note's contents
6492 elfcore_grok_prxfpreg (bfd *abfd, Elf_Internal_Note *note)
6494 return elfcore_make_note_pseudosection (abfd, ".reg-xfp", note);
6497 #if defined (HAVE_PRPSINFO_T)
6498 typedef prpsinfo_t elfcore_psinfo_t;
6499 #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
6500 typedef prpsinfo32_t elfcore_psinfo32_t;
6504 #if defined (HAVE_PSINFO_T)
6505 typedef psinfo_t elfcore_psinfo_t;
6506 #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
6507 typedef psinfo32_t elfcore_psinfo32_t;
6511 /* return a malloc'ed copy of a string at START which is at
6512 most MAX bytes long, possibly without a terminating '\0'.
6513 the copy will always have a terminating '\0'. */
6516 _bfd_elfcore_strndup (bfd *abfd, char *start, size_t max)
6519 char *end = memchr (start, '\0', max);
6527 dups = bfd_alloc (abfd, len + 1);
6531 memcpy (dups, start, len);
6537 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
6539 elfcore_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
6541 if (note->descsz == sizeof (elfcore_psinfo_t))
6543 elfcore_psinfo_t psinfo;
6545 memcpy (&psinfo, note->descdata, sizeof (psinfo));
6547 elf_tdata (abfd)->core_program
6548 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
6549 sizeof (psinfo.pr_fname));
6551 elf_tdata (abfd)->core_command
6552 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
6553 sizeof (psinfo.pr_psargs));
6555 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
6556 else if (note->descsz == sizeof (elfcore_psinfo32_t))
6558 /* 64-bit host, 32-bit corefile */
6559 elfcore_psinfo32_t psinfo;
6561 memcpy (&psinfo, note->descdata, sizeof (psinfo));
6563 elf_tdata (abfd)->core_program
6564 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
6565 sizeof (psinfo.pr_fname));
6567 elf_tdata (abfd)->core_command
6568 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
6569 sizeof (psinfo.pr_psargs));
6575 /* Fail - we don't know how to handle any other
6576 note size (ie. data object type). */
6580 /* Note that for some reason, a spurious space is tacked
6581 onto the end of the args in some (at least one anyway)
6582 implementations, so strip it off if it exists. */
6585 char *command = elf_tdata (abfd)->core_command;
6586 int n = strlen (command);
6588 if (0 < n && command[n - 1] == ' ')
6589 command[n - 1] = '\0';
6594 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
6596 #if defined (HAVE_PSTATUS_T)
6598 elfcore_grok_pstatus (bfd *abfd, Elf_Internal_Note *note)
6600 if (note->descsz == sizeof (pstatus_t)
6601 #if defined (HAVE_PXSTATUS_T)
6602 || note->descsz == sizeof (pxstatus_t)
6608 memcpy (&pstat, note->descdata, sizeof (pstat));
6610 elf_tdata (abfd)->core_pid = pstat.pr_pid;
6612 #if defined (HAVE_PSTATUS32_T)
6613 else if (note->descsz == sizeof (pstatus32_t))
6615 /* 64-bit host, 32-bit corefile */
6618 memcpy (&pstat, note->descdata, sizeof (pstat));
6620 elf_tdata (abfd)->core_pid = pstat.pr_pid;
6623 /* Could grab some more details from the "representative"
6624 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
6625 NT_LWPSTATUS note, presumably. */
6629 #endif /* defined (HAVE_PSTATUS_T) */
6631 #if defined (HAVE_LWPSTATUS_T)
6633 elfcore_grok_lwpstatus (bfd *abfd, Elf_Internal_Note *note)
6635 lwpstatus_t lwpstat;
6641 if (note->descsz != sizeof (lwpstat)
6642 #if defined (HAVE_LWPXSTATUS_T)
6643 && note->descsz != sizeof (lwpxstatus_t)
6648 memcpy (&lwpstat, note->descdata, sizeof (lwpstat));
6650 elf_tdata (abfd)->core_lwpid = lwpstat.pr_lwpid;
6651 elf_tdata (abfd)->core_signal = lwpstat.pr_cursig;
6653 /* Make a ".reg/999" section. */
6655 sprintf (buf, ".reg/%d", elfcore_make_pid (abfd));
6656 len = strlen (buf) + 1;
6657 name = bfd_alloc (abfd, len);
6660 memcpy (name, buf, len);
6662 sect = bfd_make_section_anyway (abfd, name);
6666 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
6667 sect->_raw_size = sizeof (lwpstat.pr_context.uc_mcontext.gregs);
6668 sect->filepos = note->descpos
6669 + offsetof (lwpstatus_t, pr_context.uc_mcontext.gregs);
6672 #if defined (HAVE_LWPSTATUS_T_PR_REG)
6673 sect->_raw_size = sizeof (lwpstat.pr_reg);
6674 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_reg);
6677 sect->flags = SEC_HAS_CONTENTS;
6678 sect->alignment_power = 2;
6680 if (!elfcore_maybe_make_sect (abfd, ".reg", sect))
6683 /* Make a ".reg2/999" section */
6685 sprintf (buf, ".reg2/%d", elfcore_make_pid (abfd));
6686 len = strlen (buf) + 1;
6687 name = bfd_alloc (abfd, len);
6690 memcpy (name, buf, len);
6692 sect = bfd_make_section_anyway (abfd, name);
6696 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
6697 sect->_raw_size = sizeof (lwpstat.pr_context.uc_mcontext.fpregs);
6698 sect->filepos = note->descpos
6699 + offsetof (lwpstatus_t, pr_context.uc_mcontext.fpregs);
6702 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
6703 sect->_raw_size = sizeof (lwpstat.pr_fpreg);
6704 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_fpreg);
6707 sect->flags = SEC_HAS_CONTENTS;
6708 sect->alignment_power = 2;
6710 return elfcore_maybe_make_sect (abfd, ".reg2", sect);
6712 #endif /* defined (HAVE_LWPSTATUS_T) */
6714 #if defined (HAVE_WIN32_PSTATUS_T)
6716 elfcore_grok_win32pstatus (bfd *abfd, Elf_Internal_Note *note)
6722 win32_pstatus_t pstatus;
6724 if (note->descsz < sizeof (pstatus))
6727 memcpy (&pstatus, note->descdata, sizeof (pstatus));
6729 switch (pstatus.data_type)
6731 case NOTE_INFO_PROCESS:
6732 /* FIXME: need to add ->core_command. */
6733 elf_tdata (abfd)->core_signal = pstatus.data.process_info.signal;
6734 elf_tdata (abfd)->core_pid = pstatus.data.process_info.pid;
6737 case NOTE_INFO_THREAD:
6738 /* Make a ".reg/999" section. */
6739 sprintf (buf, ".reg/%d", pstatus.data.thread_info.tid);
6741 len = strlen (buf) + 1;
6742 name = bfd_alloc (abfd, len);
6746 memcpy (name, buf, len);
6748 sect = bfd_make_section_anyway (abfd, name);
6752 sect->_raw_size = sizeof (pstatus.data.thread_info.thread_context);
6753 sect->filepos = (note->descpos
6754 + offsetof (struct win32_pstatus,
6755 data.thread_info.thread_context));
6756 sect->flags = SEC_HAS_CONTENTS;
6757 sect->alignment_power = 2;
6759 if (pstatus.data.thread_info.is_active_thread)
6760 if (! elfcore_maybe_make_sect (abfd, ".reg", sect))
6764 case NOTE_INFO_MODULE:
6765 /* Make a ".module/xxxxxxxx" section. */
6766 sprintf (buf, ".module/%08x", pstatus.data.module_info.base_address);
6768 len = strlen (buf) + 1;
6769 name = bfd_alloc (abfd, len);
6773 memcpy (name, buf, len);
6775 sect = bfd_make_section_anyway (abfd, name);
6780 sect->_raw_size = note->descsz;
6781 sect->filepos = note->descpos;
6782 sect->flags = SEC_HAS_CONTENTS;
6783 sect->alignment_power = 2;
6792 #endif /* HAVE_WIN32_PSTATUS_T */
6795 elfcore_grok_note (bfd *abfd, Elf_Internal_Note *note)
6797 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6805 if (bed->elf_backend_grok_prstatus)
6806 if ((*bed->elf_backend_grok_prstatus) (abfd, note))
6808 #if defined (HAVE_PRSTATUS_T)
6809 return elfcore_grok_prstatus (abfd, note);
6814 #if defined (HAVE_PSTATUS_T)
6816 return elfcore_grok_pstatus (abfd, note);
6819 #if defined (HAVE_LWPSTATUS_T)
6821 return elfcore_grok_lwpstatus (abfd, note);
6824 case NT_FPREGSET: /* FIXME: rename to NT_PRFPREG */
6825 return elfcore_grok_prfpreg (abfd, note);
6827 #if defined (HAVE_WIN32_PSTATUS_T)
6828 case NT_WIN32PSTATUS:
6829 return elfcore_grok_win32pstatus (abfd, note);
6832 case NT_PRXFPREG: /* Linux SSE extension */
6833 if (note->namesz == 6
6834 && strcmp (note->namedata, "LINUX") == 0)
6835 return elfcore_grok_prxfpreg (abfd, note);
6841 if (bed->elf_backend_grok_psinfo)
6842 if ((*bed->elf_backend_grok_psinfo) (abfd, note))
6844 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
6845 return elfcore_grok_psinfo (abfd, note);
6852 asection *sect = bfd_make_section_anyway (abfd, ".auxv");
6856 sect->_raw_size = note->descsz;
6857 sect->filepos = note->descpos;
6858 sect->flags = SEC_HAS_CONTENTS;
6859 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32;
6867 elfcore_netbsd_get_lwpid (Elf_Internal_Note *note, int *lwpidp)
6871 cp = strchr (note->namedata, '@');
6874 *lwpidp = atoi(cp + 1);
6881 elfcore_grok_netbsd_procinfo (bfd *abfd, Elf_Internal_Note *note)
6884 /* Signal number at offset 0x08. */
6885 elf_tdata (abfd)->core_signal
6886 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x08);
6888 /* Process ID at offset 0x50. */
6889 elf_tdata (abfd)->core_pid
6890 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x50);
6892 /* Command name at 0x7c (max 32 bytes, including nul). */
6893 elf_tdata (abfd)->core_command
6894 = _bfd_elfcore_strndup (abfd, note->descdata + 0x7c, 31);
6896 return elfcore_make_note_pseudosection (abfd, ".note.netbsdcore.procinfo",
6901 elfcore_grok_netbsd_note (bfd *abfd, Elf_Internal_Note *note)
6905 if (elfcore_netbsd_get_lwpid (note, &lwp))
6906 elf_tdata (abfd)->core_lwpid = lwp;
6908 if (note->type == NT_NETBSDCORE_PROCINFO)
6910 /* NetBSD-specific core "procinfo". Note that we expect to
6911 find this note before any of the others, which is fine,
6912 since the kernel writes this note out first when it
6913 creates a core file. */
6915 return elfcore_grok_netbsd_procinfo (abfd, note);
6918 /* As of Jan 2002 there are no other machine-independent notes
6919 defined for NetBSD core files. If the note type is less
6920 than the start of the machine-dependent note types, we don't
6923 if (note->type < NT_NETBSDCORE_FIRSTMACH)
6927 switch (bfd_get_arch (abfd))
6929 /* On the Alpha, SPARC (32-bit and 64-bit), PT_GETREGS == mach+0 and
6930 PT_GETFPREGS == mach+2. */
6932 case bfd_arch_alpha:
6933 case bfd_arch_sparc:
6936 case NT_NETBSDCORE_FIRSTMACH+0:
6937 return elfcore_make_note_pseudosection (abfd, ".reg", note);
6939 case NT_NETBSDCORE_FIRSTMACH+2:
6940 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
6946 /* On all other arch's, PT_GETREGS == mach+1 and
6947 PT_GETFPREGS == mach+3. */
6952 case NT_NETBSDCORE_FIRSTMACH+1:
6953 return elfcore_make_note_pseudosection (abfd, ".reg", note);
6955 case NT_NETBSDCORE_FIRSTMACH+3:
6956 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
6966 elfcore_grok_nto_status (bfd *abfd, Elf_Internal_Note *note, pid_t *tid)
6968 void *ddata = note->descdata;
6975 /* nto_procfs_status 'pid' field is at offset 0. */
6976 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, (bfd_byte *) ddata);
6978 /* nto_procfs_status 'tid' field is at offset 4. Pass it back. */
6979 *tid = bfd_get_32 (abfd, (bfd_byte *) ddata + 4);
6981 /* nto_procfs_status 'flags' field is at offset 8. */
6982 flags = bfd_get_32 (abfd, (bfd_byte *) ddata + 8);
6984 /* nto_procfs_status 'what' field is at offset 14. */
6985 if ((sig = bfd_get_16 (abfd, (bfd_byte *) ddata + 14)) > 0)
6987 elf_tdata (abfd)->core_signal = sig;
6988 elf_tdata (abfd)->core_lwpid = *tid;
6991 /* _DEBUG_FLAG_CURTID (current thread) is 0x80. Some cores
6992 do not come from signals so we make sure we set the current
6993 thread just in case. */
6994 if (flags & 0x00000080)
6995 elf_tdata (abfd)->core_lwpid = *tid;
6997 /* Make a ".qnx_core_status/%d" section. */
6998 sprintf (buf, ".qnx_core_status/%d", *tid);
7000 name = bfd_alloc (abfd, strlen (buf) + 1);
7005 sect = bfd_make_section_anyway (abfd, name);
7009 sect->_raw_size = note->descsz;
7010 sect->filepos = note->descpos;
7011 sect->flags = SEC_HAS_CONTENTS;
7012 sect->alignment_power = 2;
7014 return (elfcore_maybe_make_sect (abfd, ".qnx_core_status", sect));
7018 elfcore_grok_nto_gregs (bfd *abfd, Elf_Internal_Note *note, pid_t tid)
7024 /* Make a ".reg/%d" section. */
7025 sprintf (buf, ".reg/%d", tid);
7027 name = bfd_alloc (abfd, strlen (buf) + 1);
7032 sect = bfd_make_section_anyway (abfd, name);
7036 sect->_raw_size = note->descsz;
7037 sect->filepos = note->descpos;
7038 sect->flags = SEC_HAS_CONTENTS;
7039 sect->alignment_power = 2;
7041 /* This is the current thread. */
7042 if (elf_tdata (abfd)->core_lwpid == tid)
7043 return elfcore_maybe_make_sect (abfd, ".reg", sect);
7048 #define BFD_QNT_CORE_INFO 7
7049 #define BFD_QNT_CORE_STATUS 8
7050 #define BFD_QNT_CORE_GREG 9
7051 #define BFD_QNT_CORE_FPREG 10
7054 elfcore_grok_nto_note (bfd *abfd, Elf_Internal_Note *note)
7056 /* Every GREG section has a STATUS section before it. Store the
7057 tid from the previous call to pass down to the next gregs
7059 static pid_t tid = 1;
7063 case BFD_QNT_CORE_INFO: return elfcore_make_note_pseudosection (abfd, ".qnx_core_info", note);
7064 case BFD_QNT_CORE_STATUS: return elfcore_grok_nto_status (abfd, note, &tid);
7065 case BFD_QNT_CORE_GREG: return elfcore_grok_nto_gregs (abfd, note, tid);
7066 case BFD_QNT_CORE_FPREG: return elfcore_grok_prfpreg (abfd, note);
7067 default: return TRUE;
7071 /* Function: elfcore_write_note
7078 size of data for note
7081 End of buffer containing note. */
7084 elfcore_write_note (bfd *abfd,
7092 Elf_External_Note *xnp;
7102 const struct elf_backend_data *bed;
7104 namesz = strlen (name) + 1;
7105 bed = get_elf_backend_data (abfd);
7106 pad = -namesz & ((1 << bed->s->log_file_align) - 1);
7109 newspace = 12 + namesz + pad + size;
7111 p = realloc (buf, *bufsiz + newspace);
7113 *bufsiz += newspace;
7114 xnp = (Elf_External_Note *) dest;
7115 H_PUT_32 (abfd, namesz, xnp->namesz);
7116 H_PUT_32 (abfd, size, xnp->descsz);
7117 H_PUT_32 (abfd, type, xnp->type);
7121 memcpy (dest, name, namesz);
7129 memcpy (dest, input, size);
7133 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7135 elfcore_write_prpsinfo (bfd *abfd,
7142 char *note_name = "CORE";
7144 #if defined (HAVE_PSINFO_T)
7146 note_type = NT_PSINFO;
7149 note_type = NT_PRPSINFO;
7152 memset (&data, 0, sizeof (data));
7153 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
7154 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
7155 return elfcore_write_note (abfd, buf, bufsiz,
7156 note_name, note_type, &data, sizeof (data));
7158 #endif /* PSINFO_T or PRPSINFO_T */
7160 #if defined (HAVE_PRSTATUS_T)
7162 elfcore_write_prstatus (bfd *abfd,
7170 char *note_name = "CORE";
7172 memset (&prstat, 0, sizeof (prstat));
7173 prstat.pr_pid = pid;
7174 prstat.pr_cursig = cursig;
7175 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
7176 return elfcore_write_note (abfd, buf, bufsiz,
7177 note_name, NT_PRSTATUS, &prstat, sizeof (prstat));
7179 #endif /* HAVE_PRSTATUS_T */
7181 #if defined (HAVE_LWPSTATUS_T)
7183 elfcore_write_lwpstatus (bfd *abfd,
7190 lwpstatus_t lwpstat;
7191 char *note_name = "CORE";
7193 memset (&lwpstat, 0, sizeof (lwpstat));
7194 lwpstat.pr_lwpid = pid >> 16;
7195 lwpstat.pr_cursig = cursig;
7196 #if defined (HAVE_LWPSTATUS_T_PR_REG)
7197 memcpy (lwpstat.pr_reg, gregs, sizeof (lwpstat.pr_reg));
7198 #elif defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7200 memcpy (lwpstat.pr_context.uc_mcontext.gregs,
7201 gregs, sizeof (lwpstat.pr_context.uc_mcontext.gregs));
7203 memcpy (lwpstat.pr_context.uc_mcontext.__gregs,
7204 gregs, sizeof (lwpstat.pr_context.uc_mcontext.__gregs));
7207 return elfcore_write_note (abfd, buf, bufsiz, note_name,
7208 NT_LWPSTATUS, &lwpstat, sizeof (lwpstat));
7210 #endif /* HAVE_LWPSTATUS_T */
7212 #if defined (HAVE_PSTATUS_T)
7214 elfcore_write_pstatus (bfd *abfd,
7222 char *note_name = "CORE";
7224 memset (&pstat, 0, sizeof (pstat));
7225 pstat.pr_pid = pid & 0xffff;
7226 buf = elfcore_write_note (abfd, buf, bufsiz, note_name,
7227 NT_PSTATUS, &pstat, sizeof (pstat));
7230 #endif /* HAVE_PSTATUS_T */
7233 elfcore_write_prfpreg (bfd *abfd,
7239 char *note_name = "CORE";
7240 return elfcore_write_note (abfd, buf, bufsiz,
7241 note_name, NT_FPREGSET, fpregs, size);
7245 elfcore_write_prxfpreg (bfd *abfd,
7248 const void *xfpregs,
7251 char *note_name = "LINUX";
7252 return elfcore_write_note (abfd, buf, bufsiz,
7253 note_name, NT_PRXFPREG, xfpregs, size);
7257 elfcore_read_notes (bfd *abfd, file_ptr offset, bfd_size_type size)
7265 if (bfd_seek (abfd, offset, SEEK_SET) != 0)
7268 buf = bfd_malloc (size);
7272 if (bfd_bread (buf, size, abfd) != size)
7280 while (p < buf + size)
7282 /* FIXME: bad alignment assumption. */
7283 Elf_External_Note *xnp = (Elf_External_Note *) p;
7284 Elf_Internal_Note in;
7286 in.type = H_GET_32 (abfd, xnp->type);
7288 in.namesz = H_GET_32 (abfd, xnp->namesz);
7289 in.namedata = xnp->name;
7291 in.descsz = H_GET_32 (abfd, xnp->descsz);
7292 in.descdata = in.namedata + BFD_ALIGN (in.namesz, 4);
7293 in.descpos = offset + (in.descdata - buf);
7295 if (strncmp (in.namedata, "NetBSD-CORE", 11) == 0)
7297 if (! elfcore_grok_netbsd_note (abfd, &in))
7300 else if (strncmp (in.namedata, "QNX", 3) == 0)
7302 if (! elfcore_grok_nto_note (abfd, &in))
7307 if (! elfcore_grok_note (abfd, &in))
7311 p = in.descdata + BFD_ALIGN (in.descsz, 4);
7318 /* Providing external access to the ELF program header table. */
7320 /* Return an upper bound on the number of bytes required to store a
7321 copy of ABFD's program header table entries. Return -1 if an error
7322 occurs; bfd_get_error will return an appropriate code. */
7325 bfd_get_elf_phdr_upper_bound (bfd *abfd)
7327 if (abfd->xvec->flavour != bfd_target_elf_flavour)
7329 bfd_set_error (bfd_error_wrong_format);
7333 return elf_elfheader (abfd)->e_phnum * sizeof (Elf_Internal_Phdr);
7336 /* Copy ABFD's program header table entries to *PHDRS. The entries
7337 will be stored as an array of Elf_Internal_Phdr structures, as
7338 defined in include/elf/internal.h. To find out how large the
7339 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
7341 Return the number of program header table entries read, or -1 if an
7342 error occurs; bfd_get_error will return an appropriate code. */
7345 bfd_get_elf_phdrs (bfd *abfd, void *phdrs)
7349 if (abfd->xvec->flavour != bfd_target_elf_flavour)
7351 bfd_set_error (bfd_error_wrong_format);
7355 num_phdrs = elf_elfheader (abfd)->e_phnum;
7356 memcpy (phdrs, elf_tdata (abfd)->phdr,
7357 num_phdrs * sizeof (Elf_Internal_Phdr));
7363 _bfd_elf_sprintf_vma (bfd *abfd ATTRIBUTE_UNUSED, char *buf, bfd_vma value)
7366 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
7368 i_ehdrp = elf_elfheader (abfd);
7369 if (i_ehdrp == NULL)
7370 sprintf_vma (buf, value);
7373 if (i_ehdrp->e_ident[EI_CLASS] == ELFCLASS64)
7375 #if BFD_HOST_64BIT_LONG
7376 sprintf (buf, "%016lx", value);
7378 sprintf (buf, "%08lx%08lx", _bfd_int64_high (value),
7379 _bfd_int64_low (value));
7383 sprintf (buf, "%08lx", (unsigned long) (value & 0xffffffff));
7386 sprintf_vma (buf, value);
7391 _bfd_elf_fprintf_vma (bfd *abfd ATTRIBUTE_UNUSED, void *stream, bfd_vma value)
7394 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
7396 i_ehdrp = elf_elfheader (abfd);
7397 if (i_ehdrp == NULL)
7398 fprintf_vma ((FILE *) stream, value);
7401 if (i_ehdrp->e_ident[EI_CLASS] == ELFCLASS64)
7403 #if BFD_HOST_64BIT_LONG
7404 fprintf ((FILE *) stream, "%016lx", value);
7406 fprintf ((FILE *) stream, "%08lx%08lx",
7407 _bfd_int64_high (value), _bfd_int64_low (value));
7411 fprintf ((FILE *) stream, "%08lx",
7412 (unsigned long) (value & 0xffffffff));
7415 fprintf_vma ((FILE *) stream, value);
7419 enum elf_reloc_type_class
7420 _bfd_elf_reloc_type_class (const Elf_Internal_Rela *rela ATTRIBUTE_UNUSED)
7422 return reloc_class_normal;
7425 /* For RELA architectures, return the relocation value for a
7426 relocation against a local symbol. */
7429 _bfd_elf_rela_local_sym (bfd *abfd,
7430 Elf_Internal_Sym *sym,
7432 Elf_Internal_Rela *rel)
7434 asection *sec = *psec;
7437 relocation = (sec->output_section->vma
7438 + sec->output_offset
7440 if ((sec->flags & SEC_MERGE)
7441 && ELF_ST_TYPE (sym->st_info) == STT_SECTION
7442 && sec->sec_info_type == ELF_INFO_TYPE_MERGE)
7445 _bfd_merged_section_offset (abfd, psec,
7446 elf_section_data (sec)->sec_info,
7447 sym->st_value + rel->r_addend,
7450 rel->r_addend -= relocation;
7451 rel->r_addend += sec->output_section->vma + sec->output_offset;
7457 _bfd_elf_rel_local_sym (bfd *abfd,
7458 Elf_Internal_Sym *sym,
7462 asection *sec = *psec;
7464 if (sec->sec_info_type != ELF_INFO_TYPE_MERGE)
7465 return sym->st_value + addend;
7467 return _bfd_merged_section_offset (abfd, psec,
7468 elf_section_data (sec)->sec_info,
7469 sym->st_value + addend, 0);
7473 _bfd_elf_section_offset (bfd *abfd,
7474 struct bfd_link_info *info,
7478 struct bfd_elf_section_data *sec_data;
7480 sec_data = elf_section_data (sec);
7481 switch (sec->sec_info_type)
7483 case ELF_INFO_TYPE_STABS:
7484 return _bfd_stab_section_offset (abfd,
7485 &elf_hash_table (info)->merge_info,
7486 sec, &sec_data->sec_info, offset);
7487 case ELF_INFO_TYPE_EH_FRAME:
7488 return _bfd_elf_eh_frame_section_offset (abfd, sec, offset);
7494 /* Create a new BFD as if by bfd_openr. Rather than opening a file,
7495 reconstruct an ELF file by reading the segments out of remote memory
7496 based on the ELF file header at EHDR_VMA and the ELF program headers it
7497 points to. If not null, *LOADBASEP is filled in with the difference
7498 between the VMAs from which the segments were read, and the VMAs the
7499 file headers (and hence BFD's idea of each section's VMA) put them at.
7501 The function TARGET_READ_MEMORY is called to copy LEN bytes from the
7502 remote memory at target address VMA into the local buffer at MYADDR; it
7503 should return zero on success or an `errno' code on failure. TEMPL must
7504 be a BFD for an ELF target with the word size and byte order found in
7505 the remote memory. */
7508 bfd_elf_bfd_from_remote_memory
7512 int (*target_read_memory) (bfd_vma, char *, int))
7514 return (*get_elf_backend_data (templ)->elf_backend_bfd_from_remote_memory)
7515 (templ, ehdr_vma, loadbasep, target_read_memory);