1 /* ELF executable support for BFD.
2 Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
3 2003 Free Software Foundation, Inc.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
25 BFD support for ELF formats is being worked on.
26 Currently, the best supported back ends are for sparc and i386
27 (running svr4 or Solaris 2).
29 Documentation of the internals of the support code still needs
30 to be written. The code is changing quickly enough that we
31 haven't bothered yet. */
33 /* For sparc64-cross-sparc32. */
41 #include "libiberty.h"
43 static INLINE struct elf_segment_map *make_mapping
44 PARAMS ((bfd *, asection **, unsigned int, unsigned int, bfd_boolean));
45 static bfd_boolean map_sections_to_segments
47 static int elf_sort_sections
48 PARAMS ((const PTR, const PTR));
49 static bfd_boolean assign_file_positions_for_segments
51 static bfd_boolean assign_file_positions_except_relocs
53 static bfd_boolean prep_headers
55 static bfd_boolean swap_out_syms
56 PARAMS ((bfd *, struct bfd_strtab_hash **, int));
57 static bfd_boolean copy_private_bfd_data
58 PARAMS ((bfd *, bfd *));
60 PARAMS ((bfd *, file_ptr, bfd_size_type));
61 static const char *group_signature
62 PARAMS ((bfd *, Elf_Internal_Shdr *));
63 static bfd_boolean setup_group
64 PARAMS ((bfd *, Elf_Internal_Shdr *, asection *));
65 static void merge_sections_remove_hook
66 PARAMS ((bfd *, asection *));
67 static void elf_fake_sections
68 PARAMS ((bfd *, asection *, PTR));
69 static bfd_boolean assign_section_numbers
71 static INLINE int sym_is_global
72 PARAMS ((bfd *, asymbol *));
73 static bfd_boolean elf_map_symbols
75 static bfd_size_type get_program_header_size
77 static bfd_boolean elfcore_read_notes
78 PARAMS ((bfd *, file_ptr, bfd_size_type));
79 static bfd_boolean elf_find_function
80 PARAMS ((bfd *, asection *, asymbol **, bfd_vma, const char **,
82 static int elfcore_make_pid
84 static bfd_boolean elfcore_maybe_make_sect
85 PARAMS ((bfd *, char *, asection *));
86 static bfd_boolean elfcore_make_note_pseudosection
87 PARAMS ((bfd *, char *, Elf_Internal_Note *));
88 static bfd_boolean elfcore_grok_prfpreg
89 PARAMS ((bfd *, Elf_Internal_Note *));
90 static bfd_boolean elfcore_grok_prxfpreg
91 PARAMS ((bfd *, Elf_Internal_Note *));
92 static bfd_boolean elfcore_grok_note
93 PARAMS ((bfd *, Elf_Internal_Note *));
94 static bfd_boolean elfcore_netbsd_get_lwpid
95 PARAMS ((Elf_Internal_Note *, int *));
96 static bfd_boolean elfcore_grok_netbsd_procinfo
97 PARAMS ((bfd *, Elf_Internal_Note *));
98 static bfd_boolean elfcore_grok_netbsd_note
99 PARAMS ((bfd *, Elf_Internal_Note *));
100 static bfd_boolean elfcore_grok_nto_gregs
101 PARAMS ((bfd *, Elf_Internal_Note *, pid_t));
102 static bfd_boolean elfcore_grok_nto_status
103 PARAMS ((bfd *, Elf_Internal_Note *, pid_t *));
104 static bfd_boolean elfcore_grok_nto_note
105 PARAMS ((bfd *, Elf_Internal_Note *));
107 /* Swap version information in and out. The version information is
108 currently size independent. If that ever changes, this code will
109 need to move into elfcode.h. */
111 /* Swap in a Verdef structure. */
114 _bfd_elf_swap_verdef_in (abfd, src, dst)
116 const Elf_External_Verdef *src;
117 Elf_Internal_Verdef *dst;
119 dst->vd_version = H_GET_16 (abfd, src->vd_version);
120 dst->vd_flags = H_GET_16 (abfd, src->vd_flags);
121 dst->vd_ndx = H_GET_16 (abfd, src->vd_ndx);
122 dst->vd_cnt = H_GET_16 (abfd, src->vd_cnt);
123 dst->vd_hash = H_GET_32 (abfd, src->vd_hash);
124 dst->vd_aux = H_GET_32 (abfd, src->vd_aux);
125 dst->vd_next = H_GET_32 (abfd, src->vd_next);
128 /* Swap out a Verdef structure. */
131 _bfd_elf_swap_verdef_out (abfd, src, dst)
133 const Elf_Internal_Verdef *src;
134 Elf_External_Verdef *dst;
136 H_PUT_16 (abfd, src->vd_version, dst->vd_version);
137 H_PUT_16 (abfd, src->vd_flags, dst->vd_flags);
138 H_PUT_16 (abfd, src->vd_ndx, dst->vd_ndx);
139 H_PUT_16 (abfd, src->vd_cnt, dst->vd_cnt);
140 H_PUT_32 (abfd, src->vd_hash, dst->vd_hash);
141 H_PUT_32 (abfd, src->vd_aux, dst->vd_aux);
142 H_PUT_32 (abfd, src->vd_next, dst->vd_next);
145 /* Swap in a Verdaux structure. */
148 _bfd_elf_swap_verdaux_in (abfd, src, dst)
150 const Elf_External_Verdaux *src;
151 Elf_Internal_Verdaux *dst;
153 dst->vda_name = H_GET_32 (abfd, src->vda_name);
154 dst->vda_next = H_GET_32 (abfd, src->vda_next);
157 /* Swap out a Verdaux structure. */
160 _bfd_elf_swap_verdaux_out (abfd, src, dst)
162 const Elf_Internal_Verdaux *src;
163 Elf_External_Verdaux *dst;
165 H_PUT_32 (abfd, src->vda_name, dst->vda_name);
166 H_PUT_32 (abfd, src->vda_next, dst->vda_next);
169 /* Swap in a Verneed structure. */
172 _bfd_elf_swap_verneed_in (abfd, src, dst)
174 const Elf_External_Verneed *src;
175 Elf_Internal_Verneed *dst;
177 dst->vn_version = H_GET_16 (abfd, src->vn_version);
178 dst->vn_cnt = H_GET_16 (abfd, src->vn_cnt);
179 dst->vn_file = H_GET_32 (abfd, src->vn_file);
180 dst->vn_aux = H_GET_32 (abfd, src->vn_aux);
181 dst->vn_next = H_GET_32 (abfd, src->vn_next);
184 /* Swap out a Verneed structure. */
187 _bfd_elf_swap_verneed_out (abfd, src, dst)
189 const Elf_Internal_Verneed *src;
190 Elf_External_Verneed *dst;
192 H_PUT_16 (abfd, src->vn_version, dst->vn_version);
193 H_PUT_16 (abfd, src->vn_cnt, dst->vn_cnt);
194 H_PUT_32 (abfd, src->vn_file, dst->vn_file);
195 H_PUT_32 (abfd, src->vn_aux, dst->vn_aux);
196 H_PUT_32 (abfd, src->vn_next, dst->vn_next);
199 /* Swap in a Vernaux structure. */
202 _bfd_elf_swap_vernaux_in (abfd, src, dst)
204 const Elf_External_Vernaux *src;
205 Elf_Internal_Vernaux *dst;
207 dst->vna_hash = H_GET_32 (abfd, src->vna_hash);
208 dst->vna_flags = H_GET_16 (abfd, src->vna_flags);
209 dst->vna_other = H_GET_16 (abfd, src->vna_other);
210 dst->vna_name = H_GET_32 (abfd, src->vna_name);
211 dst->vna_next = H_GET_32 (abfd, src->vna_next);
214 /* Swap out a Vernaux structure. */
217 _bfd_elf_swap_vernaux_out (abfd, src, dst)
219 const Elf_Internal_Vernaux *src;
220 Elf_External_Vernaux *dst;
222 H_PUT_32 (abfd, src->vna_hash, dst->vna_hash);
223 H_PUT_16 (abfd, src->vna_flags, dst->vna_flags);
224 H_PUT_16 (abfd, src->vna_other, dst->vna_other);
225 H_PUT_32 (abfd, src->vna_name, dst->vna_name);
226 H_PUT_32 (abfd, src->vna_next, dst->vna_next);
229 /* Swap in a Versym structure. */
232 _bfd_elf_swap_versym_in (abfd, src, dst)
234 const Elf_External_Versym *src;
235 Elf_Internal_Versym *dst;
237 dst->vs_vers = H_GET_16 (abfd, src->vs_vers);
240 /* Swap out a Versym structure. */
243 _bfd_elf_swap_versym_out (abfd, src, dst)
245 const Elf_Internal_Versym *src;
246 Elf_External_Versym *dst;
248 H_PUT_16 (abfd, src->vs_vers, dst->vs_vers);
251 /* Standard ELF hash function. Do not change this function; you will
252 cause invalid hash tables to be generated. */
255 bfd_elf_hash (namearg)
258 const unsigned char *name = (const unsigned char *) namearg;
263 while ((ch = *name++) != '\0')
266 if ((g = (h & 0xf0000000)) != 0)
269 /* The ELF ABI says `h &= ~g', but this is equivalent in
270 this case and on some machines one insn instead of two. */
274 return h & 0xffffffff;
277 /* Read a specified number of bytes at a specified offset in an ELF
278 file, into a newly allocated buffer, and return a pointer to the
282 elf_read (abfd, offset, size)
289 if ((buf = bfd_alloc (abfd, size)) == NULL)
291 if (bfd_seek (abfd, offset, SEEK_SET) != 0)
293 if (bfd_bread ((PTR) buf, size, abfd) != size)
295 if (bfd_get_error () != bfd_error_system_call)
296 bfd_set_error (bfd_error_file_truncated);
303 bfd_elf_mkobject (abfd)
306 /* This just does initialization. */
307 /* coff_mkobject zalloc's space for tdata.coff_obj_data ... */
308 bfd_size_type amt = sizeof (struct elf_obj_tdata);
309 elf_tdata (abfd) = (struct elf_obj_tdata *) bfd_zalloc (abfd, amt);
310 if (elf_tdata (abfd) == 0)
312 /* Since everything is done at close time, do we need any
319 bfd_elf_mkcorefile (abfd)
322 /* I think this can be done just like an object file. */
323 return bfd_elf_mkobject (abfd);
327 bfd_elf_get_str_section (abfd, shindex)
329 unsigned int shindex;
331 Elf_Internal_Shdr **i_shdrp;
332 char *shstrtab = NULL;
334 bfd_size_type shstrtabsize;
336 i_shdrp = elf_elfsections (abfd);
337 if (i_shdrp == 0 || i_shdrp[shindex] == 0)
340 shstrtab = (char *) i_shdrp[shindex]->contents;
341 if (shstrtab == NULL)
343 /* No cached one, attempt to read, and cache what we read. */
344 offset = i_shdrp[shindex]->sh_offset;
345 shstrtabsize = i_shdrp[shindex]->sh_size;
346 shstrtab = elf_read (abfd, offset, shstrtabsize);
347 i_shdrp[shindex]->contents = (PTR) shstrtab;
353 bfd_elf_string_from_elf_section (abfd, shindex, strindex)
355 unsigned int shindex;
356 unsigned int strindex;
358 Elf_Internal_Shdr *hdr;
363 hdr = elf_elfsections (abfd)[shindex];
365 if (hdr->contents == NULL
366 && bfd_elf_get_str_section (abfd, shindex) == NULL)
369 if (strindex >= hdr->sh_size)
371 (*_bfd_error_handler)
372 (_("%s: invalid string offset %u >= %lu for section `%s'"),
373 bfd_archive_filename (abfd), strindex, (unsigned long) hdr->sh_size,
374 ((shindex == elf_elfheader(abfd)->e_shstrndx
375 && strindex == hdr->sh_name)
377 : elf_string_from_elf_strtab (abfd, hdr->sh_name)));
381 return ((char *) hdr->contents) + strindex;
384 /* Read and convert symbols to internal format.
385 SYMCOUNT specifies the number of symbols to read, starting from
386 symbol SYMOFFSET. If any of INTSYM_BUF, EXTSYM_BUF or EXTSHNDX_BUF
387 are non-NULL, they are used to store the internal symbols, external
388 symbols, and symbol section index extensions, respectively. */
391 bfd_elf_get_elf_syms (ibfd, symtab_hdr, symcount, symoffset,
392 intsym_buf, extsym_buf, extshndx_buf)
394 Elf_Internal_Shdr *symtab_hdr;
397 Elf_Internal_Sym *intsym_buf;
399 Elf_External_Sym_Shndx *extshndx_buf;
401 Elf_Internal_Shdr *shndx_hdr;
403 const bfd_byte *esym;
404 Elf_External_Sym_Shndx *alloc_extshndx;
405 Elf_External_Sym_Shndx *shndx;
406 Elf_Internal_Sym *isym;
407 Elf_Internal_Sym *isymend;
408 struct elf_backend_data *bed;
416 /* Normal syms might have section extension entries. */
418 if (symtab_hdr == &elf_tdata (ibfd)->symtab_hdr)
419 shndx_hdr = &elf_tdata (ibfd)->symtab_shndx_hdr;
421 /* Read the symbols. */
423 alloc_extshndx = NULL;
424 bed = get_elf_backend_data (ibfd);
425 extsym_size = bed->s->sizeof_sym;
426 amt = symcount * extsym_size;
427 pos = symtab_hdr->sh_offset + symoffset * extsym_size;
428 if (extsym_buf == NULL)
430 alloc_ext = bfd_malloc (amt);
431 extsym_buf = alloc_ext;
433 if (extsym_buf == NULL
434 || bfd_seek (ibfd, pos, SEEK_SET) != 0
435 || bfd_bread (extsym_buf, amt, ibfd) != amt)
441 if (shndx_hdr == NULL || shndx_hdr->sh_size == 0)
445 amt = symcount * sizeof (Elf_External_Sym_Shndx);
446 pos = shndx_hdr->sh_offset + symoffset * sizeof (Elf_External_Sym_Shndx);
447 if (extshndx_buf == NULL)
449 alloc_extshndx = (Elf_External_Sym_Shndx *) bfd_malloc (amt);
450 extshndx_buf = alloc_extshndx;
452 if (extshndx_buf == NULL
453 || bfd_seek (ibfd, pos, SEEK_SET) != 0
454 || bfd_bread (extshndx_buf, amt, ibfd) != amt)
461 if (intsym_buf == NULL)
463 bfd_size_type amt = symcount * sizeof (Elf_Internal_Sym);
464 intsym_buf = (Elf_Internal_Sym *) bfd_malloc (amt);
465 if (intsym_buf == NULL)
469 /* Convert the symbols to internal form. */
470 isymend = intsym_buf + symcount;
471 for (esym = extsym_buf, isym = intsym_buf, shndx = extshndx_buf;
473 esym += extsym_size, isym++, shndx = shndx != NULL ? shndx + 1 : NULL)
474 (*bed->s->swap_symbol_in) (ibfd, esym, (const PTR) shndx, isym);
477 if (alloc_ext != NULL)
479 if (alloc_extshndx != NULL)
480 free (alloc_extshndx);
485 /* Look up a symbol name. */
487 bfd_elf_local_sym_name (abfd, isym)
489 Elf_Internal_Sym *isym;
491 unsigned int iname = isym->st_name;
492 unsigned int shindex = elf_tdata (abfd)->symtab_hdr.sh_link;
493 if (iname == 0 && ELF_ST_TYPE (isym->st_info) == STT_SECTION)
495 iname = elf_elfsections (abfd)[isym->st_shndx]->sh_name;
496 shindex = elf_elfheader (abfd)->e_shstrndx;
499 return bfd_elf_string_from_elf_section (abfd, shindex, iname);
502 /* Elf_Internal_Shdr->contents is an array of these for SHT_GROUP
503 sections. The first element is the flags, the rest are section
506 typedef union elf_internal_group {
507 Elf_Internal_Shdr *shdr;
509 } Elf_Internal_Group;
511 /* Return the name of the group signature symbol. Why isn't the
512 signature just a string? */
515 group_signature (abfd, ghdr)
517 Elf_Internal_Shdr *ghdr;
519 Elf_Internal_Shdr *hdr;
520 unsigned char esym[sizeof (Elf64_External_Sym)];
521 Elf_External_Sym_Shndx eshndx;
522 Elf_Internal_Sym isym;
524 /* First we need to ensure the symbol table is available. */
525 if (! bfd_section_from_shdr (abfd, ghdr->sh_link))
528 /* Go read the symbol. */
529 hdr = &elf_tdata (abfd)->symtab_hdr;
530 if (bfd_elf_get_elf_syms (abfd, hdr, 1, ghdr->sh_info,
531 &isym, esym, &eshndx) == NULL)
534 return bfd_elf_local_sym_name (abfd, &isym);
537 /* Set next_in_group list pointer, and group name for NEWSECT. */
540 setup_group (abfd, hdr, newsect)
542 Elf_Internal_Shdr *hdr;
545 unsigned int num_group = elf_tdata (abfd)->num_group;
547 /* If num_group is zero, read in all SHT_GROUP sections. The count
548 is set to -1 if there are no SHT_GROUP sections. */
551 unsigned int i, shnum;
553 /* First count the number of groups. If we have a SHT_GROUP
554 section with just a flag word (ie. sh_size is 4), ignore it. */
555 shnum = elf_numsections (abfd);
557 for (i = 0; i < shnum; i++)
559 Elf_Internal_Shdr *shdr = elf_elfsections (abfd)[i];
560 if (shdr->sh_type == SHT_GROUP && shdr->sh_size >= 8)
565 num_group = (unsigned) -1;
566 elf_tdata (abfd)->num_group = num_group;
570 /* We keep a list of elf section headers for group sections,
571 so we can find them quickly. */
572 bfd_size_type amt = num_group * sizeof (Elf_Internal_Shdr *);
573 elf_tdata (abfd)->group_sect_ptr = bfd_alloc (abfd, amt);
574 if (elf_tdata (abfd)->group_sect_ptr == NULL)
578 for (i = 0; i < shnum; i++)
580 Elf_Internal_Shdr *shdr = elf_elfsections (abfd)[i];
581 if (shdr->sh_type == SHT_GROUP && shdr->sh_size >= 8)
584 Elf_Internal_Group *dest;
586 /* Add to list of sections. */
587 elf_tdata (abfd)->group_sect_ptr[num_group] = shdr;
590 /* Read the raw contents. */
591 BFD_ASSERT (sizeof (*dest) >= 4);
592 amt = shdr->sh_size * sizeof (*dest) / 4;
593 shdr->contents = bfd_alloc (abfd, amt);
594 if (shdr->contents == NULL
595 || bfd_seek (abfd, shdr->sh_offset, SEEK_SET) != 0
596 || (bfd_bread (shdr->contents, shdr->sh_size, abfd)
600 /* Translate raw contents, a flag word followed by an
601 array of elf section indices all in target byte order,
602 to the flag word followed by an array of elf section
604 src = shdr->contents + shdr->sh_size;
605 dest = (Elf_Internal_Group *) (shdr->contents + amt);
612 idx = H_GET_32 (abfd, src);
613 if (src == shdr->contents)
616 if (shdr->bfd_section != NULL && (idx & GRP_COMDAT))
617 shdr->bfd_section->flags
618 |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
623 ((*_bfd_error_handler)
624 (_("%s: invalid SHT_GROUP entry"),
625 bfd_archive_filename (abfd)));
628 dest->shdr = elf_elfsections (abfd)[idx];
635 if (num_group != (unsigned) -1)
639 for (i = 0; i < num_group; i++)
641 Elf_Internal_Shdr *shdr = elf_tdata (abfd)->group_sect_ptr[i];
642 Elf_Internal_Group *idx = (Elf_Internal_Group *) shdr->contents;
643 unsigned int n_elt = shdr->sh_size / 4;
645 /* Look through this group's sections to see if current
646 section is a member. */
648 if ((++idx)->shdr == hdr)
652 /* We are a member of this group. Go looking through
653 other members to see if any others are linked via
655 idx = (Elf_Internal_Group *) shdr->contents;
656 n_elt = shdr->sh_size / 4;
658 if ((s = (++idx)->shdr->bfd_section) != NULL
659 && elf_next_in_group (s) != NULL)
663 /* Snarf the group name from other member, and
664 insert current section in circular list. */
665 elf_group_name (newsect) = elf_group_name (s);
666 elf_next_in_group (newsect) = elf_next_in_group (s);
667 elf_next_in_group (s) = newsect;
673 gname = group_signature (abfd, shdr);
676 elf_group_name (newsect) = gname;
678 /* Start a circular list with one element. */
679 elf_next_in_group (newsect) = newsect;
682 /* If the group section has been created, point to the
684 if (shdr->bfd_section != NULL)
685 elf_next_in_group (shdr->bfd_section) = newsect;
693 if (elf_group_name (newsect) == NULL)
695 (*_bfd_error_handler) (_("%s: no group info for section %s"),
696 bfd_archive_filename (abfd), newsect->name);
702 bfd_elf_discard_group (abfd, group)
703 bfd *abfd ATTRIBUTE_UNUSED;
706 asection *first = elf_next_in_group (group);
711 s->output_section = bfd_abs_section_ptr;
712 s = elf_next_in_group (s);
713 /* These lists are circular. */
720 /* Make a BFD section from an ELF section. We store a pointer to the
721 BFD section in the bfd_section field of the header. */
724 _bfd_elf_make_section_from_shdr (abfd, hdr, name)
726 Elf_Internal_Shdr *hdr;
731 struct elf_backend_data *bed;
733 if (hdr->bfd_section != NULL)
735 BFD_ASSERT (strcmp (name,
736 bfd_get_section_name (abfd, hdr->bfd_section)) == 0);
740 newsect = bfd_make_section_anyway (abfd, name);
744 /* Always use the real type/flags. */
745 elf_section_type (newsect) = hdr->sh_type;
746 elf_section_flags (newsect) = hdr->sh_flags;
748 newsect->filepos = hdr->sh_offset;
750 if (! bfd_set_section_vma (abfd, newsect, hdr->sh_addr)
751 || ! bfd_set_section_size (abfd, newsect, hdr->sh_size)
752 || ! bfd_set_section_alignment (abfd, newsect,
753 bfd_log2 ((bfd_vma) hdr->sh_addralign)))
756 flags = SEC_NO_FLAGS;
757 if (hdr->sh_type != SHT_NOBITS)
758 flags |= SEC_HAS_CONTENTS;
759 if (hdr->sh_type == SHT_GROUP)
760 flags |= SEC_GROUP | SEC_EXCLUDE;
761 if ((hdr->sh_flags & SHF_ALLOC) != 0)
764 if (hdr->sh_type != SHT_NOBITS)
767 if ((hdr->sh_flags & SHF_WRITE) == 0)
768 flags |= SEC_READONLY;
769 if ((hdr->sh_flags & SHF_EXECINSTR) != 0)
771 else if ((flags & SEC_LOAD) != 0)
773 if ((hdr->sh_flags & SHF_MERGE) != 0)
776 newsect->entsize = hdr->sh_entsize;
777 if ((hdr->sh_flags & SHF_STRINGS) != 0)
778 flags |= SEC_STRINGS;
780 if (hdr->sh_flags & SHF_GROUP)
781 if (!setup_group (abfd, hdr, newsect))
783 if ((hdr->sh_flags & SHF_TLS) != 0)
784 flags |= SEC_THREAD_LOCAL;
786 /* The debugging sections appear to be recognized only by name, not
789 static const char *debug_sec_names [] =
798 for (i = ARRAY_SIZE (debug_sec_names); i--;)
799 if (strncmp (name, debug_sec_names[i], strlen (debug_sec_names[i])) == 0)
803 flags |= SEC_DEBUGGING;
806 /* As a GNU extension, if the name begins with .gnu.linkonce, we
807 only link a single copy of the section. This is used to support
808 g++. g++ will emit each template expansion in its own section.
809 The symbols will be defined as weak, so that multiple definitions
810 are permitted. The GNU linker extension is to actually discard
811 all but one of the sections. */
812 if (strncmp (name, ".gnu.linkonce", sizeof ".gnu.linkonce" - 1) == 0
813 && elf_next_in_group (newsect) == NULL)
814 flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
816 bed = get_elf_backend_data (abfd);
817 if (bed->elf_backend_section_flags)
818 if (! bed->elf_backend_section_flags (&flags, hdr))
821 if (! bfd_set_section_flags (abfd, newsect, flags))
824 if ((flags & SEC_ALLOC) != 0)
826 Elf_Internal_Phdr *phdr;
829 /* Look through the phdrs to see if we need to adjust the lma.
830 If all the p_paddr fields are zero, we ignore them, since
831 some ELF linkers produce such output. */
832 phdr = elf_tdata (abfd)->phdr;
833 for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
835 if (phdr->p_paddr != 0)
838 if (i < elf_elfheader (abfd)->e_phnum)
840 phdr = elf_tdata (abfd)->phdr;
841 for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
843 /* This section is part of this segment if its file
844 offset plus size lies within the segment's memory
845 span and, if the section is loaded, the extent of the
846 loaded data lies within the extent of the segment.
848 Note - we used to check the p_paddr field as well, and
849 refuse to set the LMA if it was 0. This is wrong
850 though, as a perfectly valid initialised segment can
851 have a p_paddr of zero. Some architectures, eg ARM,
852 place special significance on the address 0 and
853 executables need to be able to have a segment which
854 covers this address. */
855 if (phdr->p_type == PT_LOAD
856 && (bfd_vma) hdr->sh_offset >= phdr->p_offset
857 && (hdr->sh_offset + hdr->sh_size
858 <= phdr->p_offset + phdr->p_memsz)
859 && ((flags & SEC_LOAD) == 0
860 || (hdr->sh_offset + hdr->sh_size
861 <= phdr->p_offset + phdr->p_filesz)))
863 if ((flags & SEC_LOAD) == 0)
864 newsect->lma = (phdr->p_paddr
865 + hdr->sh_addr - phdr->p_vaddr);
867 /* We used to use the same adjustment for SEC_LOAD
868 sections, but that doesn't work if the segment
869 is packed with code from multiple VMAs.
870 Instead we calculate the section LMA based on
871 the segment LMA. It is assumed that the
872 segment will contain sections with contiguous
873 LMAs, even if the VMAs are not. */
874 newsect->lma = (phdr->p_paddr
875 + hdr->sh_offset - phdr->p_offset);
877 /* With contiguous segments, we can't tell from file
878 offsets whether a section with zero size should
879 be placed at the end of one segment or the
880 beginning of the next. Decide based on vaddr. */
881 if (hdr->sh_addr >= phdr->p_vaddr
882 && (hdr->sh_addr + hdr->sh_size
883 <= phdr->p_vaddr + phdr->p_memsz))
890 hdr->bfd_section = newsect;
891 elf_section_data (newsect)->this_hdr = *hdr;
901 struct elf_internal_shdr *bfd_elf_find_section (bfd *abfd, char *name);
904 Helper functions for GDB to locate the string tables.
905 Since BFD hides string tables from callers, GDB needs to use an
906 internal hook to find them. Sun's .stabstr, in particular,
907 isn't even pointed to by the .stab section, so ordinary
908 mechanisms wouldn't work to find it, even if we had some.
911 struct elf_internal_shdr *
912 bfd_elf_find_section (abfd, name)
916 Elf_Internal_Shdr **i_shdrp;
921 i_shdrp = elf_elfsections (abfd);
924 shstrtab = bfd_elf_get_str_section (abfd,
925 elf_elfheader (abfd)->e_shstrndx);
926 if (shstrtab != NULL)
928 max = elf_numsections (abfd);
929 for (i = 1; i < max; i++)
930 if (!strcmp (&shstrtab[i_shdrp[i]->sh_name], name))
937 const char *const bfd_elf_section_type_names[] = {
938 "SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB",
939 "SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE",
940 "SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM",
943 /* ELF relocs are against symbols. If we are producing relocatable
944 output, and the reloc is against an external symbol, and nothing
945 has given us any additional addend, the resulting reloc will also
946 be against the same symbol. In such a case, we don't want to
947 change anything about the way the reloc is handled, since it will
948 all be done at final link time. Rather than put special case code
949 into bfd_perform_relocation, all the reloc types use this howto
950 function. It just short circuits the reloc if producing
951 relocatable output against an external symbol. */
953 bfd_reloc_status_type
954 bfd_elf_generic_reloc (abfd,
961 bfd *abfd ATTRIBUTE_UNUSED;
962 arelent *reloc_entry;
964 PTR data ATTRIBUTE_UNUSED;
965 asection *input_section;
967 char **error_message ATTRIBUTE_UNUSED;
969 if (output_bfd != (bfd *) NULL
970 && (symbol->flags & BSF_SECTION_SYM) == 0
971 && (! reloc_entry->howto->partial_inplace
972 || reloc_entry->addend == 0))
974 reloc_entry->address += input_section->output_offset;
978 return bfd_reloc_continue;
981 /* Make sure sec_info_type is cleared if sec_info is cleared too. */
984 merge_sections_remove_hook (abfd, sec)
985 bfd *abfd ATTRIBUTE_UNUSED;
988 BFD_ASSERT (sec->sec_info_type == ELF_INFO_TYPE_MERGE);
989 sec->sec_info_type = ELF_INFO_TYPE_NONE;
992 /* Finish SHF_MERGE section merging. */
995 _bfd_elf_merge_sections (abfd, info)
997 struct bfd_link_info *info;
999 if (!is_elf_hash_table (info))
1001 if (elf_hash_table (info)->merge_info)
1002 _bfd_merge_sections (abfd, elf_hash_table (info)->merge_info,
1003 merge_sections_remove_hook);
1008 _bfd_elf_link_just_syms (sec, info)
1010 struct bfd_link_info *info;
1012 sec->output_section = bfd_abs_section_ptr;
1013 sec->output_offset = sec->vma;
1014 if (!is_elf_hash_table (info))
1017 sec->sec_info_type = ELF_INFO_TYPE_JUST_SYMS;
1020 /* Copy the program header and other data from one object module to
1024 _bfd_elf_copy_private_bfd_data (ibfd, obfd)
1028 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
1029 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
1032 BFD_ASSERT (!elf_flags_init (obfd)
1033 || (elf_elfheader (obfd)->e_flags
1034 == elf_elfheader (ibfd)->e_flags));
1036 elf_gp (obfd) = elf_gp (ibfd);
1037 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
1038 elf_flags_init (obfd) = TRUE;
1042 /* Print out the program headers. */
1045 _bfd_elf_print_private_bfd_data (abfd, farg)
1049 FILE *f = (FILE *) farg;
1050 Elf_Internal_Phdr *p;
1052 bfd_byte *dynbuf = NULL;
1054 p = elf_tdata (abfd)->phdr;
1059 fprintf (f, _("\nProgram Header:\n"));
1060 c = elf_elfheader (abfd)->e_phnum;
1061 for (i = 0; i < c; i++, p++)
1068 case PT_NULL: pt = "NULL"; break;
1069 case PT_LOAD: pt = "LOAD"; break;
1070 case PT_DYNAMIC: pt = "DYNAMIC"; break;
1071 case PT_INTERP: pt = "INTERP"; break;
1072 case PT_NOTE: pt = "NOTE"; break;
1073 case PT_SHLIB: pt = "SHLIB"; break;
1074 case PT_PHDR: pt = "PHDR"; break;
1075 case PT_TLS: pt = "TLS"; break;
1076 case PT_GNU_EH_FRAME: pt = "EH_FRAME"; break;
1077 case PT_GNU_STACK: pt = "STACK"; break;
1078 default: sprintf (buf, "0x%lx", p->p_type); pt = buf; break;
1080 fprintf (f, "%8s off 0x", pt);
1081 bfd_fprintf_vma (abfd, f, p->p_offset);
1082 fprintf (f, " vaddr 0x");
1083 bfd_fprintf_vma (abfd, f, p->p_vaddr);
1084 fprintf (f, " paddr 0x");
1085 bfd_fprintf_vma (abfd, f, p->p_paddr);
1086 fprintf (f, " align 2**%u\n", bfd_log2 (p->p_align));
1087 fprintf (f, " filesz 0x");
1088 bfd_fprintf_vma (abfd, f, p->p_filesz);
1089 fprintf (f, " memsz 0x");
1090 bfd_fprintf_vma (abfd, f, p->p_memsz);
1091 fprintf (f, " flags %c%c%c",
1092 (p->p_flags & PF_R) != 0 ? 'r' : '-',
1093 (p->p_flags & PF_W) != 0 ? 'w' : '-',
1094 (p->p_flags & PF_X) != 0 ? 'x' : '-');
1095 if ((p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X)) != 0)
1096 fprintf (f, " %lx", p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X));
1101 s = bfd_get_section_by_name (abfd, ".dynamic");
1105 unsigned long shlink;
1106 bfd_byte *extdyn, *extdynend;
1108 void (*swap_dyn_in) PARAMS ((bfd *, const PTR, Elf_Internal_Dyn *));
1110 fprintf (f, _("\nDynamic Section:\n"));
1112 dynbuf = (bfd_byte *) bfd_malloc (s->_raw_size);
1115 if (! bfd_get_section_contents (abfd, s, (PTR) dynbuf, (file_ptr) 0,
1119 elfsec = _bfd_elf_section_from_bfd_section (abfd, s);
1122 shlink = elf_elfsections (abfd)[elfsec]->sh_link;
1124 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
1125 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
1128 extdynend = extdyn + s->_raw_size;
1129 for (; extdyn < extdynend; extdyn += extdynsize)
1131 Elf_Internal_Dyn dyn;
1134 bfd_boolean stringp;
1136 (*swap_dyn_in) (abfd, (PTR) extdyn, &dyn);
1138 if (dyn.d_tag == DT_NULL)
1145 sprintf (ab, "0x%lx", (unsigned long) dyn.d_tag);
1149 case DT_NEEDED: name = "NEEDED"; stringp = TRUE; break;
1150 case DT_PLTRELSZ: name = "PLTRELSZ"; break;
1151 case DT_PLTGOT: name = "PLTGOT"; break;
1152 case DT_HASH: name = "HASH"; break;
1153 case DT_STRTAB: name = "STRTAB"; break;
1154 case DT_SYMTAB: name = "SYMTAB"; break;
1155 case DT_RELA: name = "RELA"; break;
1156 case DT_RELASZ: name = "RELASZ"; break;
1157 case DT_RELAENT: name = "RELAENT"; break;
1158 case DT_STRSZ: name = "STRSZ"; break;
1159 case DT_SYMENT: name = "SYMENT"; break;
1160 case DT_INIT: name = "INIT"; break;
1161 case DT_FINI: name = "FINI"; break;
1162 case DT_SONAME: name = "SONAME"; stringp = TRUE; break;
1163 case DT_RPATH: name = "RPATH"; stringp = TRUE; break;
1164 case DT_SYMBOLIC: name = "SYMBOLIC"; break;
1165 case DT_REL: name = "REL"; break;
1166 case DT_RELSZ: name = "RELSZ"; break;
1167 case DT_RELENT: name = "RELENT"; break;
1168 case DT_PLTREL: name = "PLTREL"; break;
1169 case DT_DEBUG: name = "DEBUG"; break;
1170 case DT_TEXTREL: name = "TEXTREL"; break;
1171 case DT_JMPREL: name = "JMPREL"; break;
1172 case DT_BIND_NOW: name = "BIND_NOW"; break;
1173 case DT_INIT_ARRAY: name = "INIT_ARRAY"; break;
1174 case DT_FINI_ARRAY: name = "FINI_ARRAY"; break;
1175 case DT_INIT_ARRAYSZ: name = "INIT_ARRAYSZ"; break;
1176 case DT_FINI_ARRAYSZ: name = "FINI_ARRAYSZ"; break;
1177 case DT_RUNPATH: name = "RUNPATH"; stringp = TRUE; break;
1178 case DT_FLAGS: name = "FLAGS"; break;
1179 case DT_PREINIT_ARRAY: name = "PREINIT_ARRAY"; break;
1180 case DT_PREINIT_ARRAYSZ: name = "PREINIT_ARRAYSZ"; break;
1181 case DT_CHECKSUM: name = "CHECKSUM"; break;
1182 case DT_PLTPADSZ: name = "PLTPADSZ"; break;
1183 case DT_MOVEENT: name = "MOVEENT"; break;
1184 case DT_MOVESZ: name = "MOVESZ"; break;
1185 case DT_FEATURE: name = "FEATURE"; break;
1186 case DT_POSFLAG_1: name = "POSFLAG_1"; break;
1187 case DT_SYMINSZ: name = "SYMINSZ"; break;
1188 case DT_SYMINENT: name = "SYMINENT"; break;
1189 case DT_CONFIG: name = "CONFIG"; stringp = TRUE; break;
1190 case DT_DEPAUDIT: name = "DEPAUDIT"; stringp = TRUE; break;
1191 case DT_AUDIT: name = "AUDIT"; stringp = TRUE; break;
1192 case DT_PLTPAD: name = "PLTPAD"; break;
1193 case DT_MOVETAB: name = "MOVETAB"; break;
1194 case DT_SYMINFO: name = "SYMINFO"; break;
1195 case DT_RELACOUNT: name = "RELACOUNT"; break;
1196 case DT_RELCOUNT: name = "RELCOUNT"; break;
1197 case DT_FLAGS_1: name = "FLAGS_1"; break;
1198 case DT_VERSYM: name = "VERSYM"; break;
1199 case DT_VERDEF: name = "VERDEF"; break;
1200 case DT_VERDEFNUM: name = "VERDEFNUM"; break;
1201 case DT_VERNEED: name = "VERNEED"; break;
1202 case DT_VERNEEDNUM: name = "VERNEEDNUM"; break;
1203 case DT_AUXILIARY: name = "AUXILIARY"; stringp = TRUE; break;
1204 case DT_USED: name = "USED"; break;
1205 case DT_FILTER: name = "FILTER"; stringp = TRUE; break;
1208 fprintf (f, " %-11s ", name);
1210 fprintf (f, "0x%lx", (unsigned long) dyn.d_un.d_val);
1214 unsigned int tagv = dyn.d_un.d_val;
1216 string = bfd_elf_string_from_elf_section (abfd, shlink, tagv);
1219 fprintf (f, "%s", string);
1228 if ((elf_dynverdef (abfd) != 0 && elf_tdata (abfd)->verdef == NULL)
1229 || (elf_dynverref (abfd) != 0 && elf_tdata (abfd)->verref == NULL))
1231 if (! _bfd_elf_slurp_version_tables (abfd))
1235 if (elf_dynverdef (abfd) != 0)
1237 Elf_Internal_Verdef *t;
1239 fprintf (f, _("\nVersion definitions:\n"));
1240 for (t = elf_tdata (abfd)->verdef; t != NULL; t = t->vd_nextdef)
1242 fprintf (f, "%d 0x%2.2x 0x%8.8lx %s\n", t->vd_ndx,
1243 t->vd_flags, t->vd_hash, t->vd_nodename);
1244 if (t->vd_auxptr->vda_nextptr != NULL)
1246 Elf_Internal_Verdaux *a;
1249 for (a = t->vd_auxptr->vda_nextptr;
1252 fprintf (f, "%s ", a->vda_nodename);
1258 if (elf_dynverref (abfd) != 0)
1260 Elf_Internal_Verneed *t;
1262 fprintf (f, _("\nVersion References:\n"));
1263 for (t = elf_tdata (abfd)->verref; t != NULL; t = t->vn_nextref)
1265 Elf_Internal_Vernaux *a;
1267 fprintf (f, _(" required from %s:\n"), t->vn_filename);
1268 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
1269 fprintf (f, " 0x%8.8lx 0x%2.2x %2.2d %s\n", a->vna_hash,
1270 a->vna_flags, a->vna_other, a->vna_nodename);
1282 /* Display ELF-specific fields of a symbol. */
1285 bfd_elf_print_symbol (abfd, filep, symbol, how)
1289 bfd_print_symbol_type how;
1291 FILE *file = (FILE *) filep;
1294 case bfd_print_symbol_name:
1295 fprintf (file, "%s", symbol->name);
1297 case bfd_print_symbol_more:
1298 fprintf (file, "elf ");
1299 bfd_fprintf_vma (abfd, file, symbol->value);
1300 fprintf (file, " %lx", (long) symbol->flags);
1302 case bfd_print_symbol_all:
1304 const char *section_name;
1305 const char *name = NULL;
1306 struct elf_backend_data *bed;
1307 unsigned char st_other;
1310 section_name = symbol->section ? symbol->section->name : "(*none*)";
1312 bed = get_elf_backend_data (abfd);
1313 if (bed->elf_backend_print_symbol_all)
1314 name = (*bed->elf_backend_print_symbol_all) (abfd, filep, symbol);
1318 name = symbol->name;
1319 bfd_print_symbol_vandf (abfd, (PTR) file, symbol);
1322 fprintf (file, " %s\t", section_name);
1323 /* Print the "other" value for a symbol. For common symbols,
1324 we've already printed the size; now print the alignment.
1325 For other symbols, we have no specified alignment, and
1326 we've printed the address; now print the size. */
1327 if (bfd_is_com_section (symbol->section))
1328 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_value;
1330 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_size;
1331 bfd_fprintf_vma (abfd, file, val);
1333 /* If we have version information, print it. */
1334 if (elf_tdata (abfd)->dynversym_section != 0
1335 && (elf_tdata (abfd)->dynverdef_section != 0
1336 || elf_tdata (abfd)->dynverref_section != 0))
1338 unsigned int vernum;
1339 const char *version_string;
1341 vernum = ((elf_symbol_type *) symbol)->version & VERSYM_VERSION;
1344 version_string = "";
1345 else if (vernum == 1)
1346 version_string = "Base";
1347 else if (vernum <= elf_tdata (abfd)->cverdefs)
1349 elf_tdata (abfd)->verdef[vernum - 1].vd_nodename;
1352 Elf_Internal_Verneed *t;
1354 version_string = "";
1355 for (t = elf_tdata (abfd)->verref;
1359 Elf_Internal_Vernaux *a;
1361 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
1363 if (a->vna_other == vernum)
1365 version_string = a->vna_nodename;
1372 if ((((elf_symbol_type *) symbol)->version & VERSYM_HIDDEN) == 0)
1373 fprintf (file, " %-11s", version_string);
1378 fprintf (file, " (%s)", version_string);
1379 for (i = 10 - strlen (version_string); i > 0; --i)
1384 /* If the st_other field is not zero, print it. */
1385 st_other = ((elf_symbol_type *) symbol)->internal_elf_sym.st_other;
1390 case STV_INTERNAL: fprintf (file, " .internal"); break;
1391 case STV_HIDDEN: fprintf (file, " .hidden"); break;
1392 case STV_PROTECTED: fprintf (file, " .protected"); break;
1394 /* Some other non-defined flags are also present, so print
1396 fprintf (file, " 0x%02x", (unsigned int) st_other);
1399 fprintf (file, " %s", name);
1405 /* Create an entry in an ELF linker hash table. */
1407 struct bfd_hash_entry *
1408 _bfd_elf_link_hash_newfunc (entry, table, string)
1409 struct bfd_hash_entry *entry;
1410 struct bfd_hash_table *table;
1413 /* Allocate the structure if it has not already been allocated by a
1417 entry = bfd_hash_allocate (table, sizeof (struct elf_link_hash_entry));
1422 /* Call the allocation method of the superclass. */
1423 entry = _bfd_link_hash_newfunc (entry, table, string);
1426 struct elf_link_hash_entry *ret = (struct elf_link_hash_entry *) entry;
1427 struct elf_link_hash_table *htab = (struct elf_link_hash_table *) table;
1429 /* Set local fields. */
1432 ret->dynstr_index = 0;
1433 ret->elf_hash_value = 0;
1434 ret->weakdef = NULL;
1435 ret->verinfo.verdef = NULL;
1436 ret->vtable_entries_size = 0;
1437 ret->vtable_entries_used = NULL;
1438 ret->vtable_parent = NULL;
1439 ret->got = htab->init_refcount;
1440 ret->plt = htab->init_refcount;
1442 ret->type = STT_NOTYPE;
1444 /* Assume that we have been called by a non-ELF symbol reader.
1445 This flag is then reset by the code which reads an ELF input
1446 file. This ensures that a symbol created by a non-ELF symbol
1447 reader will have the flag set correctly. */
1448 ret->elf_link_hash_flags = ELF_LINK_NON_ELF;
1454 /* Copy data from an indirect symbol to its direct symbol, hiding the
1455 old indirect symbol. Also used for copying flags to a weakdef. */
1458 _bfd_elf_link_hash_copy_indirect (bed, dir, ind)
1459 struct elf_backend_data *bed;
1460 struct elf_link_hash_entry *dir, *ind;
1463 bfd_signed_vma lowest_valid = bed->can_refcount;
1465 /* Copy down any references that we may have already seen to the
1466 symbol which just became indirect. */
1468 dir->elf_link_hash_flags |=
1469 (ind->elf_link_hash_flags
1470 & (ELF_LINK_HASH_REF_DYNAMIC
1471 | ELF_LINK_HASH_REF_REGULAR
1472 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
1473 | ELF_LINK_NON_GOT_REF));
1475 if (ind->root.type != bfd_link_hash_indirect)
1478 /* Copy over the global and procedure linkage table refcount entries.
1479 These may have been already set up by a check_relocs routine. */
1480 tmp = dir->got.refcount;
1481 if (tmp < lowest_valid)
1483 dir->got.refcount = ind->got.refcount;
1484 ind->got.refcount = tmp;
1487 BFD_ASSERT (ind->got.refcount < lowest_valid);
1489 tmp = dir->plt.refcount;
1490 if (tmp < lowest_valid)
1492 dir->plt.refcount = ind->plt.refcount;
1493 ind->plt.refcount = tmp;
1496 BFD_ASSERT (ind->plt.refcount < lowest_valid);
1498 if (dir->dynindx == -1)
1500 dir->dynindx = ind->dynindx;
1501 dir->dynstr_index = ind->dynstr_index;
1503 ind->dynstr_index = 0;
1506 BFD_ASSERT (ind->dynindx == -1);
1510 _bfd_elf_link_hash_hide_symbol (info, h, force_local)
1511 struct bfd_link_info *info;
1512 struct elf_link_hash_entry *h;
1513 bfd_boolean force_local;
1515 h->plt = elf_hash_table (info)->init_offset;
1516 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
1519 h->elf_link_hash_flags |= ELF_LINK_FORCED_LOCAL;
1520 if (h->dynindx != -1)
1523 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
1529 /* Initialize an ELF linker hash table. */
1532 _bfd_elf_link_hash_table_init (table, abfd, newfunc)
1533 struct elf_link_hash_table *table;
1535 struct bfd_hash_entry *(*newfunc)
1536 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *,
1541 table->dynamic_sections_created = FALSE;
1542 table->dynobj = NULL;
1543 /* Make sure can_refcount is extended to the width and signedness of
1544 init_refcount before we subtract one from it. */
1545 table->init_refcount.refcount = get_elf_backend_data (abfd)->can_refcount;
1546 table->init_refcount.refcount -= 1;
1547 table->init_offset.offset = -(bfd_vma) 1;
1548 /* The first dynamic symbol is a dummy. */
1549 table->dynsymcount = 1;
1550 table->dynstr = NULL;
1551 table->bucketcount = 0;
1552 table->needed = NULL;
1554 table->stab_info = NULL;
1555 table->merge_info = NULL;
1556 memset (&table->eh_info, 0, sizeof (table->eh_info));
1557 table->dynlocal = NULL;
1558 table->runpath = NULL;
1559 table->tls_segment = NULL;
1560 table->loaded = NULL;
1562 ret = _bfd_link_hash_table_init (&table->root, abfd, newfunc);
1563 table->root.type = bfd_link_elf_hash_table;
1568 /* Create an ELF linker hash table. */
1570 struct bfd_link_hash_table *
1571 _bfd_elf_link_hash_table_create (abfd)
1574 struct elf_link_hash_table *ret;
1575 bfd_size_type amt = sizeof (struct elf_link_hash_table);
1577 ret = (struct elf_link_hash_table *) bfd_malloc (amt);
1578 if (ret == (struct elf_link_hash_table *) NULL)
1581 if (! _bfd_elf_link_hash_table_init (ret, abfd, _bfd_elf_link_hash_newfunc))
1590 /* This is a hook for the ELF emulation code in the generic linker to
1591 tell the backend linker what file name to use for the DT_NEEDED
1592 entry for a dynamic object. The generic linker passes name as an
1593 empty string to indicate that no DT_NEEDED entry should be made. */
1596 bfd_elf_set_dt_needed_name (abfd, name)
1600 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
1601 && bfd_get_format (abfd) == bfd_object)
1602 elf_dt_name (abfd) = name;
1606 bfd_elf_set_dt_needed_soname (abfd, name)
1610 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
1611 && bfd_get_format (abfd) == bfd_object)
1612 elf_dt_soname (abfd) = name;
1615 /* Get the list of DT_NEEDED entries for a link. This is a hook for
1616 the linker ELF emulation code. */
1618 struct bfd_link_needed_list *
1619 bfd_elf_get_needed_list (abfd, info)
1620 bfd *abfd ATTRIBUTE_UNUSED;
1621 struct bfd_link_info *info;
1623 if (! is_elf_hash_table (info))
1625 return elf_hash_table (info)->needed;
1628 /* Get the list of DT_RPATH/DT_RUNPATH entries for a link. This is a
1629 hook for the linker ELF emulation code. */
1631 struct bfd_link_needed_list *
1632 bfd_elf_get_runpath_list (abfd, info)
1633 bfd *abfd ATTRIBUTE_UNUSED;
1634 struct bfd_link_info *info;
1636 if (! is_elf_hash_table (info))
1638 return elf_hash_table (info)->runpath;
1641 /* Get the name actually used for a dynamic object for a link. This
1642 is the SONAME entry if there is one. Otherwise, it is the string
1643 passed to bfd_elf_set_dt_needed_name, or it is the filename. */
1646 bfd_elf_get_dt_soname (abfd)
1649 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
1650 && bfd_get_format (abfd) == bfd_object)
1651 return elf_dt_name (abfd);
1655 /* Get the list of DT_NEEDED entries from a BFD. This is a hook for
1656 the ELF linker emulation code. */
1659 bfd_elf_get_bfd_needed_list (abfd, pneeded)
1661 struct bfd_link_needed_list **pneeded;
1664 bfd_byte *dynbuf = NULL;
1666 unsigned long shlink;
1667 bfd_byte *extdyn, *extdynend;
1669 void (*swap_dyn_in) PARAMS ((bfd *, const PTR, Elf_Internal_Dyn *));
1673 if (bfd_get_flavour (abfd) != bfd_target_elf_flavour
1674 || bfd_get_format (abfd) != bfd_object)
1677 s = bfd_get_section_by_name (abfd, ".dynamic");
1678 if (s == NULL || s->_raw_size == 0)
1681 dynbuf = (bfd_byte *) bfd_malloc (s->_raw_size);
1685 if (! bfd_get_section_contents (abfd, s, (PTR) dynbuf, (file_ptr) 0,
1689 elfsec = _bfd_elf_section_from_bfd_section (abfd, s);
1693 shlink = elf_elfsections (abfd)[elfsec]->sh_link;
1695 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
1696 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
1699 extdynend = extdyn + s->_raw_size;
1700 for (; extdyn < extdynend; extdyn += extdynsize)
1702 Elf_Internal_Dyn dyn;
1704 (*swap_dyn_in) (abfd, (PTR) extdyn, &dyn);
1706 if (dyn.d_tag == DT_NULL)
1709 if (dyn.d_tag == DT_NEEDED)
1712 struct bfd_link_needed_list *l;
1713 unsigned int tagv = dyn.d_un.d_val;
1716 string = bfd_elf_string_from_elf_section (abfd, shlink, tagv);
1721 l = (struct bfd_link_needed_list *) bfd_alloc (abfd, amt);
1742 /* Allocate an ELF string table--force the first byte to be zero. */
1744 struct bfd_strtab_hash *
1745 _bfd_elf_stringtab_init ()
1747 struct bfd_strtab_hash *ret;
1749 ret = _bfd_stringtab_init ();
1754 loc = _bfd_stringtab_add (ret, "", TRUE, FALSE);
1755 BFD_ASSERT (loc == 0 || loc == (bfd_size_type) -1);
1756 if (loc == (bfd_size_type) -1)
1758 _bfd_stringtab_free (ret);
1765 /* ELF .o/exec file reading */
1767 /* Create a new bfd section from an ELF section header. */
1770 bfd_section_from_shdr (abfd, shindex)
1772 unsigned int shindex;
1774 Elf_Internal_Shdr *hdr = elf_elfsections (abfd)[shindex];
1775 Elf_Internal_Ehdr *ehdr = elf_elfheader (abfd);
1776 struct elf_backend_data *bed = get_elf_backend_data (abfd);
1779 name = elf_string_from_elf_strtab (abfd, hdr->sh_name);
1781 switch (hdr->sh_type)
1784 /* Inactive section. Throw it away. */
1787 case SHT_PROGBITS: /* Normal section with contents. */
1788 case SHT_NOBITS: /* .bss section. */
1789 case SHT_HASH: /* .hash section. */
1790 case SHT_NOTE: /* .note section. */
1791 case SHT_INIT_ARRAY: /* .init_array section. */
1792 case SHT_FINI_ARRAY: /* .fini_array section. */
1793 case SHT_PREINIT_ARRAY: /* .preinit_array section. */
1794 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1796 case SHT_DYNAMIC: /* Dynamic linking information. */
1797 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
1799 if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_STRTAB)
1801 Elf_Internal_Shdr *dynsymhdr;
1803 /* The shared libraries distributed with hpux11 have a bogus
1804 sh_link field for the ".dynamic" section. Find the
1805 string table for the ".dynsym" section instead. */
1806 if (elf_dynsymtab (abfd) != 0)
1808 dynsymhdr = elf_elfsections (abfd)[elf_dynsymtab (abfd)];
1809 hdr->sh_link = dynsymhdr->sh_link;
1813 unsigned int i, num_sec;
1815 num_sec = elf_numsections (abfd);
1816 for (i = 1; i < num_sec; i++)
1818 dynsymhdr = elf_elfsections (abfd)[i];
1819 if (dynsymhdr->sh_type == SHT_DYNSYM)
1821 hdr->sh_link = dynsymhdr->sh_link;
1829 case SHT_SYMTAB: /* A symbol table */
1830 if (elf_onesymtab (abfd) == shindex)
1833 BFD_ASSERT (hdr->sh_entsize == bed->s->sizeof_sym);
1834 BFD_ASSERT (elf_onesymtab (abfd) == 0);
1835 elf_onesymtab (abfd) = shindex;
1836 elf_tdata (abfd)->symtab_hdr = *hdr;
1837 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->symtab_hdr;
1838 abfd->flags |= HAS_SYMS;
1840 /* Sometimes a shared object will map in the symbol table. If
1841 SHF_ALLOC is set, and this is a shared object, then we also
1842 treat this section as a BFD section. We can not base the
1843 decision purely on SHF_ALLOC, because that flag is sometimes
1844 set in a relocatable object file, which would confuse the
1846 if ((hdr->sh_flags & SHF_ALLOC) != 0
1847 && (abfd->flags & DYNAMIC) != 0
1848 && ! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
1853 case SHT_DYNSYM: /* A dynamic symbol table */
1854 if (elf_dynsymtab (abfd) == shindex)
1857 BFD_ASSERT (hdr->sh_entsize == bed->s->sizeof_sym);
1858 BFD_ASSERT (elf_dynsymtab (abfd) == 0);
1859 elf_dynsymtab (abfd) = shindex;
1860 elf_tdata (abfd)->dynsymtab_hdr = *hdr;
1861 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->dynsymtab_hdr;
1862 abfd->flags |= HAS_SYMS;
1864 /* Besides being a symbol table, we also treat this as a regular
1865 section, so that objcopy can handle it. */
1866 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1868 case SHT_SYMTAB_SHNDX: /* Symbol section indices when >64k sections */
1869 if (elf_symtab_shndx (abfd) == shindex)
1872 /* Get the associated symbol table. */
1873 if (! bfd_section_from_shdr (abfd, hdr->sh_link)
1874 || hdr->sh_link != elf_onesymtab (abfd))
1877 elf_symtab_shndx (abfd) = shindex;
1878 elf_tdata (abfd)->symtab_shndx_hdr = *hdr;
1879 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->symtab_shndx_hdr;
1882 case SHT_STRTAB: /* A string table */
1883 if (hdr->bfd_section != NULL)
1885 if (ehdr->e_shstrndx == shindex)
1887 elf_tdata (abfd)->shstrtab_hdr = *hdr;
1888 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->shstrtab_hdr;
1892 unsigned int i, num_sec;
1894 num_sec = elf_numsections (abfd);
1895 for (i = 1; i < num_sec; i++)
1897 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1898 if (hdr2->sh_link == shindex)
1900 if (! bfd_section_from_shdr (abfd, i))
1902 if (elf_onesymtab (abfd) == i)
1904 elf_tdata (abfd)->strtab_hdr = *hdr;
1905 elf_elfsections (abfd)[shindex] =
1906 &elf_tdata (abfd)->strtab_hdr;
1909 if (elf_dynsymtab (abfd) == i)
1911 elf_tdata (abfd)->dynstrtab_hdr = *hdr;
1912 elf_elfsections (abfd)[shindex] = hdr =
1913 &elf_tdata (abfd)->dynstrtab_hdr;
1914 /* We also treat this as a regular section, so
1915 that objcopy can handle it. */
1918 #if 0 /* Not handling other string tables specially right now. */
1919 hdr2 = elf_elfsections (abfd)[i]; /* in case it moved */
1920 /* We have a strtab for some random other section. */
1921 newsect = (asection *) hdr2->bfd_section;
1924 hdr->bfd_section = newsect;
1925 hdr2 = &elf_section_data (newsect)->str_hdr;
1927 elf_elfsections (abfd)[shindex] = hdr2;
1933 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1937 /* *These* do a lot of work -- but build no sections! */
1939 asection *target_sect;
1940 Elf_Internal_Shdr *hdr2;
1941 unsigned int num_sec = elf_numsections (abfd);
1943 /* Check for a bogus link to avoid crashing. */
1944 if ((hdr->sh_link >= SHN_LORESERVE && hdr->sh_link <= SHN_HIRESERVE)
1945 || hdr->sh_link >= num_sec)
1947 ((*_bfd_error_handler)
1948 (_("%s: invalid link %lu for reloc section %s (index %u)"),
1949 bfd_archive_filename (abfd), hdr->sh_link, name, shindex));
1950 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1953 /* For some incomprehensible reason Oracle distributes
1954 libraries for Solaris in which some of the objects have
1955 bogus sh_link fields. It would be nice if we could just
1956 reject them, but, unfortunately, some people need to use
1957 them. We scan through the section headers; if we find only
1958 one suitable symbol table, we clobber the sh_link to point
1959 to it. I hope this doesn't break anything. */
1960 if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_SYMTAB
1961 && elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_DYNSYM)
1967 for (scan = 1; scan < num_sec; scan++)
1969 if (elf_elfsections (abfd)[scan]->sh_type == SHT_SYMTAB
1970 || elf_elfsections (abfd)[scan]->sh_type == SHT_DYNSYM)
1981 hdr->sh_link = found;
1984 /* Get the symbol table. */
1985 if (elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_SYMTAB
1986 && ! bfd_section_from_shdr (abfd, hdr->sh_link))
1989 /* If this reloc section does not use the main symbol table we
1990 don't treat it as a reloc section. BFD can't adequately
1991 represent such a section, so at least for now, we don't
1992 try. We just present it as a normal section. We also
1993 can't use it as a reloc section if it points to the null
1995 if (hdr->sh_link != elf_onesymtab (abfd) || hdr->sh_info == SHN_UNDEF)
1996 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1998 if (! bfd_section_from_shdr (abfd, hdr->sh_info))
2000 target_sect = bfd_section_from_elf_index (abfd, hdr->sh_info);
2001 if (target_sect == NULL)
2004 if ((target_sect->flags & SEC_RELOC) == 0
2005 || target_sect->reloc_count == 0)
2006 hdr2 = &elf_section_data (target_sect)->rel_hdr;
2010 BFD_ASSERT (elf_section_data (target_sect)->rel_hdr2 == NULL);
2011 amt = sizeof (*hdr2);
2012 hdr2 = (Elf_Internal_Shdr *) bfd_alloc (abfd, amt);
2013 elf_section_data (target_sect)->rel_hdr2 = hdr2;
2016 elf_elfsections (abfd)[shindex] = hdr2;
2017 target_sect->reloc_count += NUM_SHDR_ENTRIES (hdr);
2018 target_sect->flags |= SEC_RELOC;
2019 target_sect->relocation = NULL;
2020 target_sect->rel_filepos = hdr->sh_offset;
2021 /* In the section to which the relocations apply, mark whether
2022 its relocations are of the REL or RELA variety. */
2023 if (hdr->sh_size != 0)
2024 target_sect->use_rela_p = hdr->sh_type == SHT_RELA;
2025 abfd->flags |= HAS_RELOC;
2030 case SHT_GNU_verdef:
2031 elf_dynverdef (abfd) = shindex;
2032 elf_tdata (abfd)->dynverdef_hdr = *hdr;
2033 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
2036 case SHT_GNU_versym:
2037 elf_dynversym (abfd) = shindex;
2038 elf_tdata (abfd)->dynversym_hdr = *hdr;
2039 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
2042 case SHT_GNU_verneed:
2043 elf_dynverref (abfd) = shindex;
2044 elf_tdata (abfd)->dynverref_hdr = *hdr;
2045 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
2052 /* We need a BFD section for objcopy and relocatable linking,
2053 and it's handy to have the signature available as the section
2055 name = group_signature (abfd, hdr);
2058 if (!_bfd_elf_make_section_from_shdr (abfd, hdr, name))
2060 if (hdr->contents != NULL)
2062 Elf_Internal_Group *idx = (Elf_Internal_Group *) hdr->contents;
2063 unsigned int n_elt = hdr->sh_size / 4;
2066 if (idx->flags & GRP_COMDAT)
2067 hdr->bfd_section->flags
2068 |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
2070 while (--n_elt != 0)
2071 if ((s = (++idx)->shdr->bfd_section) != NULL
2072 && elf_next_in_group (s) != NULL)
2074 elf_next_in_group (hdr->bfd_section) = s;
2081 /* Check for any processor-specific section types. */
2083 if (bed->elf_backend_section_from_shdr)
2084 (*bed->elf_backend_section_from_shdr) (abfd, hdr, name);
2092 /* Return the section for the local symbol specified by ABFD, R_SYMNDX.
2093 Return SEC for sections that have no elf section, and NULL on error. */
2096 bfd_section_from_r_symndx (abfd, cache, sec, r_symndx)
2098 struct sym_sec_cache *cache;
2100 unsigned long r_symndx;
2102 Elf_Internal_Shdr *symtab_hdr;
2103 unsigned char esym[sizeof (Elf64_External_Sym)];
2104 Elf_External_Sym_Shndx eshndx;
2105 Elf_Internal_Sym isym;
2106 unsigned int ent = r_symndx % LOCAL_SYM_CACHE_SIZE;
2108 if (cache->abfd == abfd && cache->indx[ent] == r_symndx)
2109 return cache->sec[ent];
2111 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2112 if (bfd_elf_get_elf_syms (abfd, symtab_hdr, 1, r_symndx,
2113 &isym, esym, &eshndx) == NULL)
2116 if (cache->abfd != abfd)
2118 memset (cache->indx, -1, sizeof (cache->indx));
2121 cache->indx[ent] = r_symndx;
2122 cache->sec[ent] = sec;
2123 if (isym.st_shndx < SHN_LORESERVE || isym.st_shndx > SHN_HIRESERVE)
2126 s = bfd_section_from_elf_index (abfd, isym.st_shndx);
2128 cache->sec[ent] = s;
2130 return cache->sec[ent];
2133 /* Given an ELF section number, retrieve the corresponding BFD
2137 bfd_section_from_elf_index (abfd, index)
2141 if (index >= elf_numsections (abfd))
2143 return elf_elfsections (abfd)[index]->bfd_section;
2146 static struct bfd_elf_special_section const special_sections[] =
2148 { ".bss", 0, NULL, 0,
2149 SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2150 { ".comment", 0, NULL, 0,
2152 { ".data", 0, NULL, 0,
2153 SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2154 { ".data1", 0, NULL, 0,
2155 SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2156 { ".debug", 0, NULL, 0,
2158 { ".fini", 0, NULL, 0,
2159 SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2160 { ".init", 0, NULL, 0,
2161 SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2162 { ".line", 0, NULL, 0,
2164 { ".rodata", 0, NULL, 0,
2165 SHT_PROGBITS, SHF_ALLOC },
2166 { ".rodata1", 0, NULL, 0,
2167 SHT_PROGBITS, SHF_ALLOC },
2168 { ".tbss", 0, NULL, 0,
2169 SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
2170 { ".tdata", 0, NULL, 0,
2171 SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
2172 { ".text", 0, NULL, 0,
2173 SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2174 { ".init_array", 0, NULL, 0,
2175 SHT_INIT_ARRAY, SHF_ALLOC + SHF_WRITE },
2176 { ".fini_array", 0, NULL, 0,
2177 SHT_FINI_ARRAY, SHF_ALLOC + SHF_WRITE },
2178 { ".preinit_array", 0, NULL, 0,
2179 SHT_PREINIT_ARRAY, SHF_ALLOC + SHF_WRITE },
2180 { ".debug_line", 0, NULL, 0,
2182 { ".debug_info", 0, NULL, 0,
2184 { ".debug_abbrev", 0, NULL, 0,
2186 { ".debug_aranges", 0, NULL, 0,
2188 { ".dynamic", 0, NULL, 0,
2189 SHT_DYNAMIC, SHF_ALLOC },
2190 { ".dynstr", 0, NULL, 0,
2191 SHT_STRTAB, SHF_ALLOC },
2192 { ".dynsym", 0, NULL, 0,
2193 SHT_DYNSYM, SHF_ALLOC },
2194 { ".got", 0, NULL, 0,
2196 { ".hash", 0, NULL, 0,
2197 SHT_HASH, SHF_ALLOC },
2198 { ".interp", 0, NULL, 0,
2200 { ".plt", 0, NULL, 0,
2202 { ".shstrtab", 0, NULL, 0,
2204 { ".strtab", 0, NULL, 0,
2206 { ".symtab", 0, NULL, 0,
2208 { ".gnu.version", 0, NULL, 0,
2209 SHT_GNU_versym, 0 },
2210 { ".gnu.version_d", 0, NULL, 0,
2211 SHT_GNU_verdef, 0 },
2212 { ".gnu.version_r", 0, NULL, 0,
2213 SHT_GNU_verneed, 0 },
2214 { ".note", 5, NULL, 0,
2216 { ".rela", 5, NULL, 0,
2218 { ".rel", 4, NULL, 0,
2220 { ".stab", 5, "str", 3,
2226 static const struct bfd_elf_special_section *
2227 get_special_section (const char *name,
2228 const struct bfd_elf_special_section *special_sections,
2233 for (i = 0; special_sections[i].prefix != NULL; i++)
2234 if (((special_sections[i].prefix_length
2235 && strncmp (name, special_sections[i].prefix,
2236 special_sections[i].prefix_length) == 0
2237 && (! special_sections[i].suffix_length
2238 || strcmp ((name + strlen (name)
2239 - special_sections[i].suffix_length),
2240 special_sections[i].suffix) == 0))
2241 || strcmp (name, special_sections[i].prefix) == 0)
2242 && (rela || special_sections[i].type != SHT_RELA))
2243 return &special_sections[i];
2249 _bfd_elf_get_sec_type_attr (bfd *abfd, const char *name,
2250 int *type, int *attr)
2252 bfd_boolean found = FALSE;
2253 struct elf_backend_data *bed = get_elf_backend_data (abfd);
2255 /* See if this is one of the special sections. */
2258 const struct bfd_elf_special_section *ssect = NULL;
2259 unsigned int rela = get_elf_backend_data (abfd)->default_use_rela_p;
2261 if (bed->special_sections)
2262 ssect = get_special_section (name, bed->special_sections, rela);
2265 ssect = get_special_section (name, special_sections, rela);
2269 *type = ssect->type;
2270 *attr = ssect->attributes;
2279 _bfd_elf_new_section_hook (abfd, sec)
2283 struct bfd_elf_section_data *sdata;
2286 sdata = (struct bfd_elf_section_data *) sec->used_by_bfd;
2289 bfd_size_type amt = sizeof (*sdata);
2290 sdata = (struct bfd_elf_section_data *) bfd_zalloc (abfd, amt);
2293 sec->used_by_bfd = (PTR) sdata;
2296 elf_section_type (sec) = SHT_NULL;
2297 if (sec->name && _bfd_elf_get_sec_type_attr (abfd, sec->name,
2300 elf_section_type (sec) = type;
2301 elf_section_flags (sec) = attr;
2304 /* Indicate whether or not this section should use RELA relocations. */
2305 sec->use_rela_p = get_elf_backend_data (abfd)->default_use_rela_p;
2310 /* Create a new bfd section from an ELF program header.
2312 Since program segments have no names, we generate a synthetic name
2313 of the form segment<NUM>, where NUM is generally the index in the
2314 program header table. For segments that are split (see below) we
2315 generate the names segment<NUM>a and segment<NUM>b.
2317 Note that some program segments may have a file size that is different than
2318 (less than) the memory size. All this means is that at execution the
2319 system must allocate the amount of memory specified by the memory size,
2320 but only initialize it with the first "file size" bytes read from the
2321 file. This would occur for example, with program segments consisting
2322 of combined data+bss.
2324 To handle the above situation, this routine generates TWO bfd sections
2325 for the single program segment. The first has the length specified by
2326 the file size of the segment, and the second has the length specified
2327 by the difference between the two sizes. In effect, the segment is split
2328 into it's initialized and uninitialized parts.
2333 _bfd_elf_make_section_from_phdr (abfd, hdr, index, typename)
2335 Elf_Internal_Phdr *hdr;
2337 const char *typename;
2345 split = ((hdr->p_memsz > 0)
2346 && (hdr->p_filesz > 0)
2347 && (hdr->p_memsz > hdr->p_filesz));
2348 sprintf (namebuf, "%s%d%s", typename, index, split ? "a" : "");
2349 len = strlen (namebuf) + 1;
2350 name = bfd_alloc (abfd, (bfd_size_type) len);
2353 memcpy (name, namebuf, len);
2354 newsect = bfd_make_section (abfd, name);
2355 if (newsect == NULL)
2357 newsect->vma = hdr->p_vaddr;
2358 newsect->lma = hdr->p_paddr;
2359 newsect->_raw_size = hdr->p_filesz;
2360 newsect->filepos = hdr->p_offset;
2361 newsect->flags |= SEC_HAS_CONTENTS;
2362 if (hdr->p_type == PT_LOAD)
2364 newsect->flags |= SEC_ALLOC;
2365 newsect->flags |= SEC_LOAD;
2366 if (hdr->p_flags & PF_X)
2368 /* FIXME: all we known is that it has execute PERMISSION,
2370 newsect->flags |= SEC_CODE;
2373 if (!(hdr->p_flags & PF_W))
2375 newsect->flags |= SEC_READONLY;
2380 sprintf (namebuf, "%s%db", typename, index);
2381 len = strlen (namebuf) + 1;
2382 name = bfd_alloc (abfd, (bfd_size_type) len);
2385 memcpy (name, namebuf, len);
2386 newsect = bfd_make_section (abfd, name);
2387 if (newsect == NULL)
2389 newsect->vma = hdr->p_vaddr + hdr->p_filesz;
2390 newsect->lma = hdr->p_paddr + hdr->p_filesz;
2391 newsect->_raw_size = hdr->p_memsz - hdr->p_filesz;
2392 if (hdr->p_type == PT_LOAD)
2394 newsect->flags |= SEC_ALLOC;
2395 if (hdr->p_flags & PF_X)
2396 newsect->flags |= SEC_CODE;
2398 if (!(hdr->p_flags & PF_W))
2399 newsect->flags |= SEC_READONLY;
2406 bfd_section_from_phdr (abfd, hdr, index)
2408 Elf_Internal_Phdr *hdr;
2411 struct elf_backend_data *bed;
2413 switch (hdr->p_type)
2416 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "null");
2419 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "load");
2422 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "dynamic");
2425 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "interp");
2428 if (! _bfd_elf_make_section_from_phdr (abfd, hdr, index, "note"))
2430 if (! elfcore_read_notes (abfd, (file_ptr) hdr->p_offset, hdr->p_filesz))
2435 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "shlib");
2438 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "phdr");
2440 case PT_GNU_EH_FRAME:
2441 return _bfd_elf_make_section_from_phdr (abfd, hdr, index,
2445 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "stack");
2448 /* Check for any processor-specific program segment types.
2449 If no handler for them, default to making "segment" sections. */
2450 bed = get_elf_backend_data (abfd);
2451 if (bed->elf_backend_section_from_phdr)
2452 return (*bed->elf_backend_section_from_phdr) (abfd, hdr, index);
2454 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "segment");
2458 /* Initialize REL_HDR, the section-header for new section, containing
2459 relocations against ASECT. If USE_RELA_P is TRUE, we use RELA
2460 relocations; otherwise, we use REL relocations. */
2463 _bfd_elf_init_reloc_shdr (abfd, rel_hdr, asect, use_rela_p)
2465 Elf_Internal_Shdr *rel_hdr;
2467 bfd_boolean use_rela_p;
2470 struct elf_backend_data *bed = get_elf_backend_data (abfd);
2471 bfd_size_type amt = sizeof ".rela" + strlen (asect->name);
2473 name = bfd_alloc (abfd, amt);
2476 sprintf (name, "%s%s", use_rela_p ? ".rela" : ".rel", asect->name);
2478 (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd), name,
2480 if (rel_hdr->sh_name == (unsigned int) -1)
2482 rel_hdr->sh_type = use_rela_p ? SHT_RELA : SHT_REL;
2483 rel_hdr->sh_entsize = (use_rela_p
2484 ? bed->s->sizeof_rela
2485 : bed->s->sizeof_rel);
2486 rel_hdr->sh_addralign = 1 << bed->s->log_file_align;
2487 rel_hdr->sh_flags = 0;
2488 rel_hdr->sh_addr = 0;
2489 rel_hdr->sh_size = 0;
2490 rel_hdr->sh_offset = 0;
2495 /* Set up an ELF internal section header for a section. */
2498 elf_fake_sections (abfd, asect, failedptrarg)
2503 struct elf_backend_data *bed = get_elf_backend_data (abfd);
2504 bfd_boolean *failedptr = (bfd_boolean *) failedptrarg;
2505 Elf_Internal_Shdr *this_hdr;
2509 /* We already failed; just get out of the bfd_map_over_sections
2514 this_hdr = &elf_section_data (asect)->this_hdr;
2516 this_hdr->sh_name = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
2517 asect->name, FALSE);
2518 if (this_hdr->sh_name == (unsigned int) -1)
2524 this_hdr->sh_flags = 0;
2526 if ((asect->flags & SEC_ALLOC) != 0
2527 || asect->user_set_vma)
2528 this_hdr->sh_addr = asect->vma;
2530 this_hdr->sh_addr = 0;
2532 this_hdr->sh_offset = 0;
2533 this_hdr->sh_size = asect->_raw_size;
2534 this_hdr->sh_link = 0;
2535 this_hdr->sh_addralign = 1 << asect->alignment_power;
2536 /* The sh_entsize and sh_info fields may have been set already by
2537 copy_private_section_data. */
2539 this_hdr->bfd_section = asect;
2540 this_hdr->contents = NULL;
2542 /* If the section type is unspecified, we set it based on
2544 if (this_hdr->sh_type == SHT_NULL)
2546 if ((asect->flags & SEC_ALLOC) != 0
2547 && (((asect->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
2548 || (asect->flags & SEC_NEVER_LOAD) != 0))
2549 this_hdr->sh_type = SHT_NOBITS;
2551 this_hdr->sh_type = SHT_PROGBITS;
2554 switch (this_hdr->sh_type)
2560 case SHT_INIT_ARRAY:
2561 case SHT_FINI_ARRAY:
2562 case SHT_PREINIT_ARRAY:
2569 this_hdr->sh_entsize = bed->s->sizeof_hash_entry;
2573 this_hdr->sh_entsize = bed->s->sizeof_sym;
2577 this_hdr->sh_entsize = bed->s->sizeof_dyn;
2581 if (get_elf_backend_data (abfd)->may_use_rela_p)
2582 this_hdr->sh_entsize = bed->s->sizeof_rela;
2586 if (get_elf_backend_data (abfd)->may_use_rel_p)
2587 this_hdr->sh_entsize = bed->s->sizeof_rel;
2590 case SHT_GNU_versym:
2591 this_hdr->sh_entsize = sizeof (Elf_External_Versym);
2594 case SHT_GNU_verdef:
2595 this_hdr->sh_entsize = 0;
2596 /* objcopy or strip will copy over sh_info, but may not set
2597 cverdefs. The linker will set cverdefs, but sh_info will be
2599 if (this_hdr->sh_info == 0)
2600 this_hdr->sh_info = elf_tdata (abfd)->cverdefs;
2602 BFD_ASSERT (elf_tdata (abfd)->cverdefs == 0
2603 || this_hdr->sh_info == elf_tdata (abfd)->cverdefs);
2606 case SHT_GNU_verneed:
2607 this_hdr->sh_entsize = 0;
2608 /* objcopy or strip will copy over sh_info, but may not set
2609 cverrefs. The linker will set cverrefs, but sh_info will be
2611 if (this_hdr->sh_info == 0)
2612 this_hdr->sh_info = elf_tdata (abfd)->cverrefs;
2614 BFD_ASSERT (elf_tdata (abfd)->cverrefs == 0
2615 || this_hdr->sh_info == elf_tdata (abfd)->cverrefs);
2619 this_hdr->sh_entsize = 4;
2623 if ((asect->flags & SEC_ALLOC) != 0)
2624 this_hdr->sh_flags |= SHF_ALLOC;
2625 if ((asect->flags & SEC_READONLY) == 0)
2626 this_hdr->sh_flags |= SHF_WRITE;
2627 if ((asect->flags & SEC_CODE) != 0)
2628 this_hdr->sh_flags |= SHF_EXECINSTR;
2629 if ((asect->flags & SEC_MERGE) != 0)
2631 this_hdr->sh_flags |= SHF_MERGE;
2632 this_hdr->sh_entsize = asect->entsize;
2633 if ((asect->flags & SEC_STRINGS) != 0)
2634 this_hdr->sh_flags |= SHF_STRINGS;
2636 if ((asect->flags & SEC_GROUP) == 0 && elf_group_name (asect) != NULL)
2637 this_hdr->sh_flags |= SHF_GROUP;
2638 if ((asect->flags & SEC_THREAD_LOCAL) != 0)
2640 this_hdr->sh_flags |= SHF_TLS;
2641 if (asect->_raw_size == 0 && (asect->flags & SEC_HAS_CONTENTS) == 0)
2643 struct bfd_link_order *o;
2645 this_hdr->sh_size = 0;
2646 for (o = asect->link_order_head; o != NULL; o = o->next)
2647 if (this_hdr->sh_size < o->offset + o->size)
2648 this_hdr->sh_size = o->offset + o->size;
2649 if (this_hdr->sh_size)
2650 this_hdr->sh_type = SHT_NOBITS;
2654 /* Check for processor-specific section types. */
2655 if (bed->elf_backend_fake_sections
2656 && !(*bed->elf_backend_fake_sections) (abfd, this_hdr, asect))
2659 /* If the section has relocs, set up a section header for the
2660 SHT_REL[A] section. If two relocation sections are required for
2661 this section, it is up to the processor-specific back-end to
2662 create the other. */
2663 if ((asect->flags & SEC_RELOC) != 0
2664 && !_bfd_elf_init_reloc_shdr (abfd,
2665 &elf_section_data (asect)->rel_hdr,
2671 /* Fill in the contents of a SHT_GROUP section. */
2674 bfd_elf_set_group_contents (abfd, sec, failedptrarg)
2679 bfd_boolean *failedptr = (bfd_boolean *) failedptrarg;
2680 unsigned long symindx;
2681 asection *elt, *first;
2683 struct bfd_link_order *l;
2686 if (elf_section_data (sec)->this_hdr.sh_type != SHT_GROUP
2691 if (elf_group_id (sec) != NULL)
2692 symindx = elf_group_id (sec)->udata.i;
2696 /* If called from the assembler, swap_out_syms will have set up
2697 elf_section_syms; If called for "ld -r", use target_index. */
2698 if (elf_section_syms (abfd) != NULL)
2699 symindx = elf_section_syms (abfd)[sec->index]->udata.i;
2701 symindx = sec->target_index;
2703 elf_section_data (sec)->this_hdr.sh_info = symindx;
2705 /* The contents won't be allocated for "ld -r" or objcopy. */
2707 if (sec->contents == NULL)
2710 sec->contents = bfd_alloc (abfd, sec->_raw_size);
2712 /* Arrange for the section to be written out. */
2713 elf_section_data (sec)->this_hdr.contents = sec->contents;
2714 if (sec->contents == NULL)
2721 loc = sec->contents + sec->_raw_size;
2723 /* Get the pointer to the first section in the group that gas
2724 squirreled away here. objcopy arranges for this to be set to the
2725 start of the input section group. */
2726 first = elt = elf_next_in_group (sec);
2728 /* First element is a flag word. Rest of section is elf section
2729 indices for all the sections of the group. Write them backwards
2730 just to keep the group in the same order as given in .section
2731 directives, not that it matters. */
2740 s = s->output_section;
2743 idx = elf_section_data (s)->this_idx;
2744 H_PUT_32 (abfd, idx, loc);
2745 elt = elf_next_in_group (elt);
2750 /* If this is a relocatable link, then the above did nothing because
2751 SEC is the output section. Look through the input sections
2753 for (l = sec->link_order_head; l != NULL; l = l->next)
2754 if (l->type == bfd_indirect_link_order
2755 && (elt = elf_next_in_group (l->u.indirect.section)) != NULL)
2760 elf_section_data (elt->output_section)->this_idx, loc);
2761 elt = elf_next_in_group (elt);
2762 /* During a relocatable link, the lists are circular. */
2764 while (elt != elf_next_in_group (l->u.indirect.section));
2766 /* With ld -r, merging SHT_GROUP sections results in wasted space
2767 due to allowing for the flag word on each input. We may well
2768 duplicate entries too. */
2769 while ((loc -= 4) > sec->contents)
2770 H_PUT_32 (abfd, 0, loc);
2772 if (loc != sec->contents)
2775 H_PUT_32 (abfd, sec->flags & SEC_LINK_ONCE ? GRP_COMDAT : 0, loc);
2778 /* Assign all ELF section numbers. The dummy first section is handled here
2779 too. The link/info pointers for the standard section types are filled
2780 in here too, while we're at it. */
2783 assign_section_numbers (abfd)
2786 struct elf_obj_tdata *t = elf_tdata (abfd);
2788 unsigned int section_number, secn;
2789 Elf_Internal_Shdr **i_shdrp;
2794 _bfd_elf_strtab_clear_all_refs (elf_shstrtab (abfd));
2796 for (sec = abfd->sections; sec; sec = sec->next)
2798 struct bfd_elf_section_data *d = elf_section_data (sec);
2800 if (section_number == SHN_LORESERVE)
2801 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2802 d->this_idx = section_number++;
2803 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->this_hdr.sh_name);
2804 if ((sec->flags & SEC_RELOC) == 0)
2808 if (section_number == SHN_LORESERVE)
2809 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2810 d->rel_idx = section_number++;
2811 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rel_hdr.sh_name);
2816 if (section_number == SHN_LORESERVE)
2817 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2818 d->rel_idx2 = section_number++;
2819 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rel_hdr2->sh_name);
2825 if (section_number == SHN_LORESERVE)
2826 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2827 t->shstrtab_section = section_number++;
2828 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->shstrtab_hdr.sh_name);
2829 elf_elfheader (abfd)->e_shstrndx = t->shstrtab_section;
2831 if (bfd_get_symcount (abfd) > 0)
2833 if (section_number == SHN_LORESERVE)
2834 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2835 t->symtab_section = section_number++;
2836 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->symtab_hdr.sh_name);
2837 if (section_number > SHN_LORESERVE - 2)
2839 if (section_number == SHN_LORESERVE)
2840 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2841 t->symtab_shndx_section = section_number++;
2842 t->symtab_shndx_hdr.sh_name
2843 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
2844 ".symtab_shndx", FALSE);
2845 if (t->symtab_shndx_hdr.sh_name == (unsigned int) -1)
2848 if (section_number == SHN_LORESERVE)
2849 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2850 t->strtab_section = section_number++;
2851 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->strtab_hdr.sh_name);
2854 _bfd_elf_strtab_finalize (elf_shstrtab (abfd));
2855 t->shstrtab_hdr.sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
2857 elf_numsections (abfd) = section_number;
2858 elf_elfheader (abfd)->e_shnum = section_number;
2859 if (section_number > SHN_LORESERVE)
2860 elf_elfheader (abfd)->e_shnum -= SHN_HIRESERVE + 1 - SHN_LORESERVE;
2862 /* Set up the list of section header pointers, in agreement with the
2864 amt = section_number * sizeof (Elf_Internal_Shdr *);
2865 i_shdrp = (Elf_Internal_Shdr **) bfd_zalloc (abfd, amt);
2866 if (i_shdrp == NULL)
2869 amt = sizeof (Elf_Internal_Shdr);
2870 i_shdrp[0] = (Elf_Internal_Shdr *) bfd_zalloc (abfd, amt);
2871 if (i_shdrp[0] == NULL)
2873 bfd_release (abfd, i_shdrp);
2877 elf_elfsections (abfd) = i_shdrp;
2879 i_shdrp[t->shstrtab_section] = &t->shstrtab_hdr;
2880 if (bfd_get_symcount (abfd) > 0)
2882 i_shdrp[t->symtab_section] = &t->symtab_hdr;
2883 if (elf_numsections (abfd) > SHN_LORESERVE)
2885 i_shdrp[t->symtab_shndx_section] = &t->symtab_shndx_hdr;
2886 t->symtab_shndx_hdr.sh_link = t->symtab_section;
2888 i_shdrp[t->strtab_section] = &t->strtab_hdr;
2889 t->symtab_hdr.sh_link = t->strtab_section;
2891 for (sec = abfd->sections; sec; sec = sec->next)
2893 struct bfd_elf_section_data *d = elf_section_data (sec);
2897 i_shdrp[d->this_idx] = &d->this_hdr;
2898 if (d->rel_idx != 0)
2899 i_shdrp[d->rel_idx] = &d->rel_hdr;
2900 if (d->rel_idx2 != 0)
2901 i_shdrp[d->rel_idx2] = d->rel_hdr2;
2903 /* Fill in the sh_link and sh_info fields while we're at it. */
2905 /* sh_link of a reloc section is the section index of the symbol
2906 table. sh_info is the section index of the section to which
2907 the relocation entries apply. */
2908 if (d->rel_idx != 0)
2910 d->rel_hdr.sh_link = t->symtab_section;
2911 d->rel_hdr.sh_info = d->this_idx;
2913 if (d->rel_idx2 != 0)
2915 d->rel_hdr2->sh_link = t->symtab_section;
2916 d->rel_hdr2->sh_info = d->this_idx;
2919 switch (d->this_hdr.sh_type)
2923 /* A reloc section which we are treating as a normal BFD
2924 section. sh_link is the section index of the symbol
2925 table. sh_info is the section index of the section to
2926 which the relocation entries apply. We assume that an
2927 allocated reloc section uses the dynamic symbol table.
2928 FIXME: How can we be sure? */
2929 s = bfd_get_section_by_name (abfd, ".dynsym");
2931 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
2933 /* We look up the section the relocs apply to by name. */
2935 if (d->this_hdr.sh_type == SHT_REL)
2939 s = bfd_get_section_by_name (abfd, name);
2941 d->this_hdr.sh_info = elf_section_data (s)->this_idx;
2945 /* We assume that a section named .stab*str is a stabs
2946 string section. We look for a section with the same name
2947 but without the trailing ``str'', and set its sh_link
2948 field to point to this section. */
2949 if (strncmp (sec->name, ".stab", sizeof ".stab" - 1) == 0
2950 && strcmp (sec->name + strlen (sec->name) - 3, "str") == 0)
2955 len = strlen (sec->name);
2956 alc = (char *) bfd_malloc ((bfd_size_type) (len - 2));
2959 memcpy (alc, sec->name, len - 3);
2960 alc[len - 3] = '\0';
2961 s = bfd_get_section_by_name (abfd, alc);
2965 elf_section_data (s)->this_hdr.sh_link = d->this_idx;
2967 /* This is a .stab section. */
2968 if (elf_section_data (s)->this_hdr.sh_entsize == 0)
2969 elf_section_data (s)->this_hdr.sh_entsize
2970 = 4 + 2 * bfd_get_arch_size (abfd) / 8;
2977 case SHT_GNU_verneed:
2978 case SHT_GNU_verdef:
2979 /* sh_link is the section header index of the string table
2980 used for the dynamic entries, or the symbol table, or the
2982 s = bfd_get_section_by_name (abfd, ".dynstr");
2984 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
2988 case SHT_GNU_versym:
2989 /* sh_link is the section header index of the symbol table
2990 this hash table or version table is for. */
2991 s = bfd_get_section_by_name (abfd, ".dynsym");
2993 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
2997 d->this_hdr.sh_link = t->symtab_section;
3001 for (secn = 1; secn < section_number; ++secn)
3002 if (i_shdrp[secn] == NULL)
3003 i_shdrp[secn] = i_shdrp[0];
3005 i_shdrp[secn]->sh_name = _bfd_elf_strtab_offset (elf_shstrtab (abfd),
3006 i_shdrp[secn]->sh_name);
3010 /* Map symbol from it's internal number to the external number, moving
3011 all local symbols to be at the head of the list. */
3014 sym_is_global (abfd, sym)
3018 /* If the backend has a special mapping, use it. */
3019 if (get_elf_backend_data (abfd)->elf_backend_sym_is_global)
3020 return ((*get_elf_backend_data (abfd)->elf_backend_sym_is_global)
3023 return ((sym->flags & (BSF_GLOBAL | BSF_WEAK)) != 0
3024 || bfd_is_und_section (bfd_get_section (sym))
3025 || bfd_is_com_section (bfd_get_section (sym)));
3029 elf_map_symbols (abfd)
3032 unsigned int symcount = bfd_get_symcount (abfd);
3033 asymbol **syms = bfd_get_outsymbols (abfd);
3034 asymbol **sect_syms;
3035 unsigned int num_locals = 0;
3036 unsigned int num_globals = 0;
3037 unsigned int num_locals2 = 0;
3038 unsigned int num_globals2 = 0;
3046 fprintf (stderr, "elf_map_symbols\n");
3050 for (asect = abfd->sections; asect; asect = asect->next)
3052 if (max_index < asect->index)
3053 max_index = asect->index;
3057 amt = max_index * sizeof (asymbol *);
3058 sect_syms = (asymbol **) bfd_zalloc (abfd, amt);
3059 if (sect_syms == NULL)
3061 elf_section_syms (abfd) = sect_syms;
3062 elf_num_section_syms (abfd) = max_index;
3064 /* Init sect_syms entries for any section symbols we have already
3065 decided to output. */
3066 for (idx = 0; idx < symcount; idx++)
3068 asymbol *sym = syms[idx];
3070 if ((sym->flags & BSF_SECTION_SYM) != 0
3077 if (sec->owner != NULL)
3079 if (sec->owner != abfd)
3081 if (sec->output_offset != 0)
3084 sec = sec->output_section;
3086 /* Empty sections in the input files may have had a
3087 section symbol created for them. (See the comment
3088 near the end of _bfd_generic_link_output_symbols in
3089 linker.c). If the linker script discards such
3090 sections then we will reach this point. Since we know
3091 that we cannot avoid this case, we detect it and skip
3092 the abort and the assignment to the sect_syms array.
3093 To reproduce this particular case try running the
3094 linker testsuite test ld-scripts/weak.exp for an ELF
3095 port that uses the generic linker. */
3096 if (sec->owner == NULL)
3099 BFD_ASSERT (sec->owner == abfd);
3101 sect_syms[sec->index] = syms[idx];
3106 /* Classify all of the symbols. */
3107 for (idx = 0; idx < symcount; idx++)
3109 if (!sym_is_global (abfd, syms[idx]))
3115 /* We will be adding a section symbol for each BFD section. Most normal
3116 sections will already have a section symbol in outsymbols, but
3117 eg. SHT_GROUP sections will not, and we need the section symbol mapped
3118 at least in that case. */
3119 for (asect = abfd->sections; asect; asect = asect->next)
3121 if (sect_syms[asect->index] == NULL)
3123 if (!sym_is_global (abfd, asect->symbol))
3130 /* Now sort the symbols so the local symbols are first. */
3131 amt = (num_locals + num_globals) * sizeof (asymbol *);
3132 new_syms = (asymbol **) bfd_alloc (abfd, amt);
3134 if (new_syms == NULL)
3137 for (idx = 0; idx < symcount; idx++)
3139 asymbol *sym = syms[idx];
3142 if (!sym_is_global (abfd, sym))
3145 i = num_locals + num_globals2++;
3147 sym->udata.i = i + 1;
3149 for (asect = abfd->sections; asect; asect = asect->next)
3151 if (sect_syms[asect->index] == NULL)
3153 asymbol *sym = asect->symbol;
3156 sect_syms[asect->index] = sym;
3157 if (!sym_is_global (abfd, sym))
3160 i = num_locals + num_globals2++;
3162 sym->udata.i = i + 1;
3166 bfd_set_symtab (abfd, new_syms, num_locals + num_globals);
3168 elf_num_locals (abfd) = num_locals;
3169 elf_num_globals (abfd) = num_globals;
3173 /* Align to the maximum file alignment that could be required for any
3174 ELF data structure. */
3176 static INLINE file_ptr align_file_position
3177 PARAMS ((file_ptr, int));
3178 static INLINE file_ptr
3179 align_file_position (off, align)
3183 return (off + align - 1) & ~(align - 1);
3186 /* Assign a file position to a section, optionally aligning to the
3187 required section alignment. */
3190 _bfd_elf_assign_file_position_for_section (i_shdrp, offset, align)
3191 Elf_Internal_Shdr *i_shdrp;
3199 al = i_shdrp->sh_addralign;
3201 offset = BFD_ALIGN (offset, al);
3203 i_shdrp->sh_offset = offset;
3204 if (i_shdrp->bfd_section != NULL)
3205 i_shdrp->bfd_section->filepos = offset;
3206 if (i_shdrp->sh_type != SHT_NOBITS)
3207 offset += i_shdrp->sh_size;
3211 /* Compute the file positions we are going to put the sections at, and
3212 otherwise prepare to begin writing out the ELF file. If LINK_INFO
3213 is not NULL, this is being called by the ELF backend linker. */
3216 _bfd_elf_compute_section_file_positions (abfd, link_info)
3218 struct bfd_link_info *link_info;
3220 struct elf_backend_data *bed = get_elf_backend_data (abfd);
3222 struct bfd_strtab_hash *strtab;
3223 Elf_Internal_Shdr *shstrtab_hdr;
3225 if (abfd->output_has_begun)
3228 /* Do any elf backend specific processing first. */
3229 if (bed->elf_backend_begin_write_processing)
3230 (*bed->elf_backend_begin_write_processing) (abfd, link_info);
3232 if (! prep_headers (abfd))
3235 /* Post process the headers if necessary. */
3236 if (bed->elf_backend_post_process_headers)
3237 (*bed->elf_backend_post_process_headers) (abfd, link_info);
3240 bfd_map_over_sections (abfd, elf_fake_sections, &failed);
3244 if (!assign_section_numbers (abfd))
3247 /* The backend linker builds symbol table information itself. */
3248 if (link_info == NULL && bfd_get_symcount (abfd) > 0)
3250 /* Non-zero if doing a relocatable link. */
3251 int relocatable_p = ! (abfd->flags & (EXEC_P | DYNAMIC));
3253 if (! swap_out_syms (abfd, &strtab, relocatable_p))
3257 if (link_info == NULL)
3259 bfd_map_over_sections (abfd, bfd_elf_set_group_contents, &failed);
3264 shstrtab_hdr = &elf_tdata (abfd)->shstrtab_hdr;
3265 /* sh_name was set in prep_headers. */
3266 shstrtab_hdr->sh_type = SHT_STRTAB;
3267 shstrtab_hdr->sh_flags = 0;
3268 shstrtab_hdr->sh_addr = 0;
3269 shstrtab_hdr->sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
3270 shstrtab_hdr->sh_entsize = 0;
3271 shstrtab_hdr->sh_link = 0;
3272 shstrtab_hdr->sh_info = 0;
3273 /* sh_offset is set in assign_file_positions_except_relocs. */
3274 shstrtab_hdr->sh_addralign = 1;
3276 if (!assign_file_positions_except_relocs (abfd))
3279 if (link_info == NULL && bfd_get_symcount (abfd) > 0)
3282 Elf_Internal_Shdr *hdr;
3284 off = elf_tdata (abfd)->next_file_pos;
3286 hdr = &elf_tdata (abfd)->symtab_hdr;
3287 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3289 hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
3290 if (hdr->sh_size != 0)
3291 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3293 hdr = &elf_tdata (abfd)->strtab_hdr;
3294 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3296 elf_tdata (abfd)->next_file_pos = off;
3298 /* Now that we know where the .strtab section goes, write it
3300 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
3301 || ! _bfd_stringtab_emit (abfd, strtab))
3303 _bfd_stringtab_free (strtab);
3306 abfd->output_has_begun = TRUE;
3311 /* Create a mapping from a set of sections to a program segment. */
3313 static INLINE struct elf_segment_map *
3314 make_mapping (abfd, sections, from, to, phdr)
3316 asection **sections;
3321 struct elf_segment_map *m;
3326 amt = sizeof (struct elf_segment_map);
3327 amt += (to - from - 1) * sizeof (asection *);
3328 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3332 m->p_type = PT_LOAD;
3333 for (i = from, hdrpp = sections + from; i < to; i++, hdrpp++)
3334 m->sections[i - from] = *hdrpp;
3335 m->count = to - from;
3337 if (from == 0 && phdr)
3339 /* Include the headers in the first PT_LOAD segment. */
3340 m->includes_filehdr = 1;
3341 m->includes_phdrs = 1;
3347 /* Set up a mapping from BFD sections to program segments. */
3350 map_sections_to_segments (abfd)
3353 asection **sections = NULL;
3357 struct elf_segment_map *mfirst;
3358 struct elf_segment_map **pm;
3359 struct elf_segment_map *m;
3361 unsigned int phdr_index;
3362 bfd_vma maxpagesize;
3364 bfd_boolean phdr_in_segment = TRUE;
3365 bfd_boolean writable;
3367 asection *first_tls = NULL;
3368 asection *dynsec, *eh_frame_hdr;
3371 if (elf_tdata (abfd)->segment_map != NULL)
3374 if (bfd_count_sections (abfd) == 0)
3377 /* Select the allocated sections, and sort them. */
3379 amt = bfd_count_sections (abfd) * sizeof (asection *);
3380 sections = (asection **) bfd_malloc (amt);
3381 if (sections == NULL)
3385 for (s = abfd->sections; s != NULL; s = s->next)
3387 if ((s->flags & SEC_ALLOC) != 0)
3393 BFD_ASSERT (i <= bfd_count_sections (abfd));
3396 qsort (sections, (size_t) count, sizeof (asection *), elf_sort_sections);
3398 /* Build the mapping. */
3403 /* If we have a .interp section, then create a PT_PHDR segment for
3404 the program headers and a PT_INTERP segment for the .interp
3406 s = bfd_get_section_by_name (abfd, ".interp");
3407 if (s != NULL && (s->flags & SEC_LOAD) != 0)
3409 amt = sizeof (struct elf_segment_map);
3410 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3414 m->p_type = PT_PHDR;
3415 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
3416 m->p_flags = PF_R | PF_X;
3417 m->p_flags_valid = 1;
3418 m->includes_phdrs = 1;
3423 amt = sizeof (struct elf_segment_map);
3424 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3428 m->p_type = PT_INTERP;
3436 /* Look through the sections. We put sections in the same program
3437 segment when the start of the second section can be placed within
3438 a few bytes of the end of the first section. */
3441 maxpagesize = get_elf_backend_data (abfd)->maxpagesize;
3443 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
3445 && (dynsec->flags & SEC_LOAD) == 0)
3448 /* Deal with -Ttext or something similar such that the first section
3449 is not adjacent to the program headers. This is an
3450 approximation, since at this point we don't know exactly how many
3451 program headers we will need. */
3454 bfd_size_type phdr_size;
3456 phdr_size = elf_tdata (abfd)->program_header_size;
3458 phdr_size = get_elf_backend_data (abfd)->s->sizeof_phdr;
3459 if ((abfd->flags & D_PAGED) == 0
3460 || sections[0]->lma < phdr_size
3461 || sections[0]->lma % maxpagesize < phdr_size % maxpagesize)
3462 phdr_in_segment = FALSE;
3465 for (i = 0, hdrpp = sections; i < count; i++, hdrpp++)
3468 bfd_boolean new_segment;
3472 /* See if this section and the last one will fit in the same
3475 if (last_hdr == NULL)
3477 /* If we don't have a segment yet, then we don't need a new
3478 one (we build the last one after this loop). */
3479 new_segment = FALSE;
3481 else if (last_hdr->lma - last_hdr->vma != hdr->lma - hdr->vma)
3483 /* If this section has a different relation between the
3484 virtual address and the load address, then we need a new
3488 else if (BFD_ALIGN (last_hdr->lma + last_hdr->_raw_size, maxpagesize)
3489 < BFD_ALIGN (hdr->lma, maxpagesize))
3491 /* If putting this section in this segment would force us to
3492 skip a page in the segment, then we need a new segment. */
3495 else if ((last_hdr->flags & SEC_LOAD) == 0
3496 && (hdr->flags & SEC_LOAD) != 0)
3498 /* We don't want to put a loadable section after a
3499 nonloadable section in the same segment. */
3502 else if ((abfd->flags & D_PAGED) == 0)
3504 /* If the file is not demand paged, which means that we
3505 don't require the sections to be correctly aligned in the
3506 file, then there is no other reason for a new segment. */
3507 new_segment = FALSE;
3510 && (hdr->flags & SEC_READONLY) == 0
3511 && (((last_hdr->lma + last_hdr->_raw_size - 1)
3512 & ~(maxpagesize - 1))
3513 != (hdr->lma & ~(maxpagesize - 1))))
3515 /* We don't want to put a writable section in a read only
3516 segment, unless they are on the same page in memory
3517 anyhow. We already know that the last section does not
3518 bring us past the current section on the page, so the
3519 only case in which the new section is not on the same
3520 page as the previous section is when the previous section
3521 ends precisely on a page boundary. */
3526 /* Otherwise, we can use the same segment. */
3527 new_segment = FALSE;
3532 if ((hdr->flags & SEC_READONLY) == 0)
3538 /* We need a new program segment. We must create a new program
3539 header holding all the sections from phdr_index until hdr. */
3541 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
3548 if ((hdr->flags & SEC_READONLY) == 0)
3555 phdr_in_segment = FALSE;
3558 /* Create a final PT_LOAD program segment. */
3559 if (last_hdr != NULL)
3561 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
3569 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
3572 amt = sizeof (struct elf_segment_map);
3573 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3577 m->p_type = PT_DYNAMIC;
3579 m->sections[0] = dynsec;
3585 /* For each loadable .note section, add a PT_NOTE segment. We don't
3586 use bfd_get_section_by_name, because if we link together
3587 nonloadable .note sections and loadable .note sections, we will
3588 generate two .note sections in the output file. FIXME: Using
3589 names for section types is bogus anyhow. */
3590 for (s = abfd->sections; s != NULL; s = s->next)
3592 if ((s->flags & SEC_LOAD) != 0
3593 && strncmp (s->name, ".note", 5) == 0)
3595 amt = sizeof (struct elf_segment_map);
3596 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3600 m->p_type = PT_NOTE;
3607 if (s->flags & SEC_THREAD_LOCAL)
3615 /* If there are any SHF_TLS output sections, add PT_TLS segment. */
3620 amt = sizeof (struct elf_segment_map);
3621 amt += (tls_count - 1) * sizeof (asection *);
3622 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3627 m->count = tls_count;
3628 /* Mandated PF_R. */
3630 m->p_flags_valid = 1;
3631 for (i = 0; i < tls_count; ++i)
3633 BFD_ASSERT (first_tls->flags & SEC_THREAD_LOCAL);
3634 m->sections[i] = first_tls;
3635 first_tls = first_tls->next;
3642 /* If there is a .eh_frame_hdr section, throw in a PT_GNU_EH_FRAME
3644 eh_frame_hdr = elf_tdata (abfd)->eh_frame_hdr;
3645 if (eh_frame_hdr != NULL
3646 && (eh_frame_hdr->output_section->flags & SEC_LOAD) != 0)
3648 amt = sizeof (struct elf_segment_map);
3649 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3653 m->p_type = PT_GNU_EH_FRAME;
3655 m->sections[0] = eh_frame_hdr->output_section;
3661 if (elf_tdata (abfd)->stack_flags)
3663 amt = sizeof (struct elf_segment_map);
3664 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3668 m->p_type = PT_GNU_STACK;
3669 m->p_flags = elf_tdata (abfd)->stack_flags;
3670 m->p_flags_valid = 1;
3679 elf_tdata (abfd)->segment_map = mfirst;
3683 if (sections != NULL)
3688 /* Sort sections by address. */
3691 elf_sort_sections (arg1, arg2)
3695 const asection *sec1 = *(const asection **) arg1;
3696 const asection *sec2 = *(const asection **) arg2;
3697 bfd_size_type size1, size2;
3699 /* Sort by LMA first, since this is the address used to
3700 place the section into a segment. */
3701 if (sec1->lma < sec2->lma)
3703 else if (sec1->lma > sec2->lma)
3706 /* Then sort by VMA. Normally the LMA and the VMA will be
3707 the same, and this will do nothing. */
3708 if (sec1->vma < sec2->vma)
3710 else if (sec1->vma > sec2->vma)
3713 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
3715 #define TOEND(x) (((x)->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0)
3721 /* If the indicies are the same, do not return 0
3722 here, but continue to try the next comparison. */
3723 if (sec1->target_index - sec2->target_index != 0)
3724 return sec1->target_index - sec2->target_index;
3729 else if (TOEND (sec2))
3734 /* Sort by size, to put zero sized sections
3735 before others at the same address. */
3737 size1 = (sec1->flags & SEC_LOAD) ? sec1->_raw_size : 0;
3738 size2 = (sec2->flags & SEC_LOAD) ? sec2->_raw_size : 0;
3745 return sec1->target_index - sec2->target_index;
3748 /* Assign file positions to the sections based on the mapping from
3749 sections to segments. This function also sets up some fields in
3750 the file header, and writes out the program headers. */
3753 assign_file_positions_for_segments (abfd)
3756 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3758 struct elf_segment_map *m;
3760 Elf_Internal_Phdr *phdrs;
3762 bfd_vma filehdr_vaddr, filehdr_paddr;
3763 bfd_vma phdrs_vaddr, phdrs_paddr;
3764 Elf_Internal_Phdr *p;
3767 if (elf_tdata (abfd)->segment_map == NULL)
3769 if (! map_sections_to_segments (abfd))
3774 /* The placement algorithm assumes that non allocated sections are
3775 not in PT_LOAD segments. We ensure this here by removing such
3776 sections from the segment map. */
3777 for (m = elf_tdata (abfd)->segment_map;
3781 unsigned int new_count;
3784 if (m->p_type != PT_LOAD)
3788 for (i = 0; i < m->count; i ++)
3790 if ((m->sections[i]->flags & SEC_ALLOC) != 0)
3793 m->sections[new_count] = m->sections[i];
3799 if (new_count != m->count)
3800 m->count = new_count;
3804 if (bed->elf_backend_modify_segment_map)
3806 if (! (*bed->elf_backend_modify_segment_map) (abfd))
3811 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
3814 elf_elfheader (abfd)->e_phoff = bed->s->sizeof_ehdr;
3815 elf_elfheader (abfd)->e_phentsize = bed->s->sizeof_phdr;
3816 elf_elfheader (abfd)->e_phnum = count;
3821 /* If we already counted the number of program segments, make sure
3822 that we allocated enough space. This happens when SIZEOF_HEADERS
3823 is used in a linker script. */
3824 alloc = elf_tdata (abfd)->program_header_size / bed->s->sizeof_phdr;
3825 if (alloc != 0 && count > alloc)
3827 ((*_bfd_error_handler)
3828 (_("%s: Not enough room for program headers (allocated %u, need %u)"),
3829 bfd_get_filename (abfd), alloc, count));
3830 bfd_set_error (bfd_error_bad_value);
3837 amt = alloc * sizeof (Elf_Internal_Phdr);
3838 phdrs = (Elf_Internal_Phdr *) bfd_alloc (abfd, amt);
3842 off = bed->s->sizeof_ehdr;
3843 off += alloc * bed->s->sizeof_phdr;
3850 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
3857 /* If elf_segment_map is not from map_sections_to_segments, the
3858 sections may not be correctly ordered. NOTE: sorting should
3859 not be done to the PT_NOTE section of a corefile, which may
3860 contain several pseudo-sections artificially created by bfd.
3861 Sorting these pseudo-sections breaks things badly. */
3863 && !(elf_elfheader (abfd)->e_type == ET_CORE
3864 && m->p_type == PT_NOTE))
3865 qsort (m->sections, (size_t) m->count, sizeof (asection *),
3868 p->p_type = m->p_type;
3869 p->p_flags = m->p_flags;
3871 if (p->p_type == PT_LOAD
3873 && (m->sections[0]->flags & SEC_ALLOC) != 0)
3875 if ((abfd->flags & D_PAGED) != 0)
3876 off += (m->sections[0]->vma - off) % bed->maxpagesize;
3879 bfd_size_type align;
3882 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
3884 bfd_size_type secalign;
3886 secalign = bfd_get_section_alignment (abfd, *secpp);
3887 if (secalign > align)
3891 off += (m->sections[0]->vma - off) % (1 << align);
3898 p->p_vaddr = m->sections[0]->vma;
3900 if (m->p_paddr_valid)
3901 p->p_paddr = m->p_paddr;
3902 else if (m->count == 0)
3905 p->p_paddr = m->sections[0]->lma;
3907 if (p->p_type == PT_LOAD
3908 && (abfd->flags & D_PAGED) != 0)
3909 p->p_align = bed->maxpagesize;
3910 else if (m->count == 0)
3911 p->p_align = 1 << bed->s->log_file_align;
3919 if (m->includes_filehdr)
3921 if (! m->p_flags_valid)
3924 p->p_filesz = bed->s->sizeof_ehdr;
3925 p->p_memsz = bed->s->sizeof_ehdr;
3928 BFD_ASSERT (p->p_type == PT_LOAD);
3930 if (p->p_vaddr < (bfd_vma) off)
3932 (*_bfd_error_handler)
3933 (_("%s: Not enough room for program headers, try linking with -N"),
3934 bfd_get_filename (abfd));
3935 bfd_set_error (bfd_error_bad_value);
3940 if (! m->p_paddr_valid)
3943 if (p->p_type == PT_LOAD)
3945 filehdr_vaddr = p->p_vaddr;
3946 filehdr_paddr = p->p_paddr;
3950 if (m->includes_phdrs)
3952 if (! m->p_flags_valid)
3955 if (m->includes_filehdr)
3957 if (p->p_type == PT_LOAD)
3959 phdrs_vaddr = p->p_vaddr + bed->s->sizeof_ehdr;
3960 phdrs_paddr = p->p_paddr + bed->s->sizeof_ehdr;
3965 p->p_offset = bed->s->sizeof_ehdr;
3969 BFD_ASSERT (p->p_type == PT_LOAD);
3970 p->p_vaddr -= off - p->p_offset;
3971 if (! m->p_paddr_valid)
3972 p->p_paddr -= off - p->p_offset;
3975 if (p->p_type == PT_LOAD)
3977 phdrs_vaddr = p->p_vaddr;
3978 phdrs_paddr = p->p_paddr;
3981 phdrs_vaddr = bed->maxpagesize + bed->s->sizeof_ehdr;
3984 p->p_filesz += alloc * bed->s->sizeof_phdr;
3985 p->p_memsz += alloc * bed->s->sizeof_phdr;
3988 if (p->p_type == PT_LOAD
3989 || (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core))
3991 if (! m->includes_filehdr && ! m->includes_phdrs)
3997 adjust = off - (p->p_offset + p->p_filesz);
3998 p->p_filesz += adjust;
3999 p->p_memsz += adjust;
4005 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
4009 bfd_size_type align;
4013 align = 1 << bfd_get_section_alignment (abfd, sec);
4015 /* The section may have artificial alignment forced by a
4016 link script. Notice this case by the gap between the
4017 cumulative phdr lma and the section's lma. */
4018 if (p->p_paddr + p->p_memsz < sec->lma)
4020 bfd_vma adjust = sec->lma - (p->p_paddr + p->p_memsz);
4022 p->p_memsz += adjust;
4023 if (p->p_type == PT_LOAD
4024 || (p->p_type == PT_NOTE
4025 && bfd_get_format (abfd) == bfd_core))
4030 if ((flags & SEC_LOAD) != 0
4031 || (flags & SEC_THREAD_LOCAL) != 0)
4032 p->p_filesz += adjust;
4035 if (p->p_type == PT_LOAD)
4037 bfd_signed_vma adjust;
4039 if ((flags & SEC_LOAD) != 0)
4041 adjust = sec->lma - (p->p_paddr + p->p_memsz);
4045 else if ((flags & SEC_ALLOC) != 0)
4047 /* The section VMA must equal the file position
4048 modulo the page size. FIXME: I'm not sure if
4049 this adjustment is really necessary. We used to
4050 not have the SEC_LOAD case just above, and then
4051 this was necessary, but now I'm not sure. */
4052 if ((abfd->flags & D_PAGED) != 0)
4053 adjust = (sec->vma - voff) % bed->maxpagesize;
4055 adjust = (sec->vma - voff) % align;
4064 (* _bfd_error_handler) (_("\
4065 Error: First section in segment (%s) starts at 0x%x whereas the segment starts at 0x%x"),
4066 bfd_section_name (abfd, sec),
4071 p->p_memsz += adjust;
4074 if ((flags & SEC_LOAD) != 0)
4075 p->p_filesz += adjust;
4080 /* We check SEC_HAS_CONTENTS here because if NOLOAD is
4081 used in a linker script we may have a section with
4082 SEC_LOAD clear but which is supposed to have
4084 if ((flags & SEC_LOAD) != 0
4085 || (flags & SEC_HAS_CONTENTS) != 0)
4086 off += sec->_raw_size;
4088 if ((flags & SEC_ALLOC) != 0
4089 && ((flags & SEC_LOAD) != 0
4090 || (flags & SEC_THREAD_LOCAL) == 0))
4091 voff += sec->_raw_size;
4094 if (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core)
4096 /* The actual "note" segment has i == 0.
4097 This is the one that actually contains everything. */
4101 p->p_filesz = sec->_raw_size;
4102 off += sec->_raw_size;
4107 /* Fake sections -- don't need to be written. */
4110 flags = sec->flags = 0;
4117 if ((sec->flags & SEC_LOAD) != 0
4118 || (sec->flags & SEC_THREAD_LOCAL) == 0
4119 || p->p_type == PT_TLS)
4120 p->p_memsz += sec->_raw_size;
4122 if ((flags & SEC_LOAD) != 0)
4123 p->p_filesz += sec->_raw_size;
4125 if (p->p_type == PT_TLS
4126 && sec->_raw_size == 0
4127 && (sec->flags & SEC_HAS_CONTENTS) == 0)
4129 struct bfd_link_order *o;
4130 bfd_vma tbss_size = 0;
4132 for (o = sec->link_order_head; o != NULL; o = o->next)
4133 if (tbss_size < o->offset + o->size)
4134 tbss_size = o->offset + o->size;
4136 p->p_memsz += tbss_size;
4139 if (align > p->p_align
4140 && (p->p_type != PT_LOAD || (abfd->flags & D_PAGED) == 0))
4144 if (! m->p_flags_valid)
4147 if ((flags & SEC_CODE) != 0)
4149 if ((flags & SEC_READONLY) == 0)
4155 /* Now that we have set the section file positions, we can set up
4156 the file positions for the non PT_LOAD segments. */
4157 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
4161 if (p->p_type != PT_LOAD && m->count > 0)
4163 BFD_ASSERT (! m->includes_filehdr && ! m->includes_phdrs);
4164 p->p_offset = m->sections[0]->filepos;
4168 if (m->includes_filehdr)
4170 p->p_vaddr = filehdr_vaddr;
4171 if (! m->p_paddr_valid)
4172 p->p_paddr = filehdr_paddr;
4174 else if (m->includes_phdrs)
4176 p->p_vaddr = phdrs_vaddr;
4177 if (! m->p_paddr_valid)
4178 p->p_paddr = phdrs_paddr;
4183 /* Clear out any program headers we allocated but did not use. */
4184 for (; count < alloc; count++, p++)
4186 memset (p, 0, sizeof *p);
4187 p->p_type = PT_NULL;
4190 elf_tdata (abfd)->phdr = phdrs;
4192 elf_tdata (abfd)->next_file_pos = off;
4194 /* Write out the program headers. */
4195 if (bfd_seek (abfd, (bfd_signed_vma) bed->s->sizeof_ehdr, SEEK_SET) != 0
4196 || bed->s->write_out_phdrs (abfd, phdrs, alloc) != 0)
4202 /* Get the size of the program header.
4204 If this is called by the linker before any of the section VMA's are set, it
4205 can't calculate the correct value for a strange memory layout. This only
4206 happens when SIZEOF_HEADERS is used in a linker script. In this case,
4207 SORTED_HDRS is NULL and we assume the normal scenario of one text and one
4208 data segment (exclusive of .interp and .dynamic).
4210 ??? User written scripts must either not use SIZEOF_HEADERS, or assume there
4211 will be two segments. */
4213 static bfd_size_type
4214 get_program_header_size (abfd)
4219 struct elf_backend_data *bed = get_elf_backend_data (abfd);
4221 /* We can't return a different result each time we're called. */
4222 if (elf_tdata (abfd)->program_header_size != 0)
4223 return elf_tdata (abfd)->program_header_size;
4225 if (elf_tdata (abfd)->segment_map != NULL)
4227 struct elf_segment_map *m;
4230 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
4232 elf_tdata (abfd)->program_header_size = segs * bed->s->sizeof_phdr;
4233 return elf_tdata (abfd)->program_header_size;
4236 /* Assume we will need exactly two PT_LOAD segments: one for text
4237 and one for data. */
4240 s = bfd_get_section_by_name (abfd, ".interp");
4241 if (s != NULL && (s->flags & SEC_LOAD) != 0)
4243 /* If we have a loadable interpreter section, we need a
4244 PT_INTERP segment. In this case, assume we also need a
4245 PT_PHDR segment, although that may not be true for all
4250 if (bfd_get_section_by_name (abfd, ".dynamic") != NULL)
4252 /* We need a PT_DYNAMIC segment. */
4256 if (elf_tdata (abfd)->eh_frame_hdr)
4258 /* We need a PT_GNU_EH_FRAME segment. */
4262 if (elf_tdata (abfd)->stack_flags)
4264 /* We need a PT_GNU_STACK segment. */
4268 for (s = abfd->sections; s != NULL; s = s->next)
4270 if ((s->flags & SEC_LOAD) != 0
4271 && strncmp (s->name, ".note", 5) == 0)
4273 /* We need a PT_NOTE segment. */
4278 for (s = abfd->sections; s != NULL; s = s->next)
4280 if (s->flags & SEC_THREAD_LOCAL)
4282 /* We need a PT_TLS segment. */
4288 /* Let the backend count up any program headers it might need. */
4289 if (bed->elf_backend_additional_program_headers)
4293 a = (*bed->elf_backend_additional_program_headers) (abfd);
4299 elf_tdata (abfd)->program_header_size = segs * bed->s->sizeof_phdr;
4300 return elf_tdata (abfd)->program_header_size;
4303 /* Work out the file positions of all the sections. This is called by
4304 _bfd_elf_compute_section_file_positions. All the section sizes and
4305 VMAs must be known before this is called.
4307 We do not consider reloc sections at this point, unless they form
4308 part of the loadable image. Reloc sections are assigned file
4309 positions in assign_file_positions_for_relocs, which is called by
4310 write_object_contents and final_link.
4312 We also don't set the positions of the .symtab and .strtab here. */
4315 assign_file_positions_except_relocs (abfd)
4318 struct elf_obj_tdata * const tdata = elf_tdata (abfd);
4319 Elf_Internal_Ehdr * const i_ehdrp = elf_elfheader (abfd);
4320 Elf_Internal_Shdr ** const i_shdrpp = elf_elfsections (abfd);
4321 unsigned int num_sec = elf_numsections (abfd);
4323 struct elf_backend_data *bed = get_elf_backend_data (abfd);
4325 if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0
4326 && bfd_get_format (abfd) != bfd_core)
4328 Elf_Internal_Shdr **hdrpp;
4331 /* Start after the ELF header. */
4332 off = i_ehdrp->e_ehsize;
4334 /* We are not creating an executable, which means that we are
4335 not creating a program header, and that the actual order of
4336 the sections in the file is unimportant. */
4337 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
4339 Elf_Internal_Shdr *hdr;
4342 if (hdr->sh_type == SHT_REL
4343 || hdr->sh_type == SHT_RELA
4344 || i == tdata->symtab_section
4345 || i == tdata->symtab_shndx_section
4346 || i == tdata->strtab_section)
4348 hdr->sh_offset = -1;
4351 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4353 if (i == SHN_LORESERVE - 1)
4355 i += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4356 hdrpp += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4363 Elf_Internal_Shdr **hdrpp;
4365 /* Assign file positions for the loaded sections based on the
4366 assignment of sections to segments. */
4367 if (! assign_file_positions_for_segments (abfd))
4370 /* Assign file positions for the other sections. */
4372 off = elf_tdata (abfd)->next_file_pos;
4373 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
4375 Elf_Internal_Shdr *hdr;
4378 if (hdr->bfd_section != NULL
4379 && hdr->bfd_section->filepos != 0)
4380 hdr->sh_offset = hdr->bfd_section->filepos;
4381 else if ((hdr->sh_flags & SHF_ALLOC) != 0)
4383 ((*_bfd_error_handler)
4384 (_("%s: warning: allocated section `%s' not in segment"),
4385 bfd_get_filename (abfd),
4386 (hdr->bfd_section == NULL
4388 : hdr->bfd_section->name)));
4389 if ((abfd->flags & D_PAGED) != 0)
4390 off += (hdr->sh_addr - off) % bed->maxpagesize;
4392 off += (hdr->sh_addr - off) % hdr->sh_addralign;
4393 off = _bfd_elf_assign_file_position_for_section (hdr, off,
4396 else if (hdr->sh_type == SHT_REL
4397 || hdr->sh_type == SHT_RELA
4398 || hdr == i_shdrpp[tdata->symtab_section]
4399 || hdr == i_shdrpp[tdata->symtab_shndx_section]
4400 || hdr == i_shdrpp[tdata->strtab_section])
4401 hdr->sh_offset = -1;
4403 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4405 if (i == SHN_LORESERVE - 1)
4407 i += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4408 hdrpp += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4413 /* Place the section headers. */
4414 off = align_file_position (off, 1 << bed->s->log_file_align);
4415 i_ehdrp->e_shoff = off;
4416 off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize;
4418 elf_tdata (abfd)->next_file_pos = off;
4427 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
4428 Elf_Internal_Phdr *i_phdrp = 0; /* Program header table, internal form */
4429 Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */
4430 struct elf_strtab_hash *shstrtab;
4431 struct elf_backend_data *bed = get_elf_backend_data (abfd);
4433 i_ehdrp = elf_elfheader (abfd);
4434 i_shdrp = elf_elfsections (abfd);
4436 shstrtab = _bfd_elf_strtab_init ();
4437 if (shstrtab == NULL)
4440 elf_shstrtab (abfd) = shstrtab;
4442 i_ehdrp->e_ident[EI_MAG0] = ELFMAG0;
4443 i_ehdrp->e_ident[EI_MAG1] = ELFMAG1;
4444 i_ehdrp->e_ident[EI_MAG2] = ELFMAG2;
4445 i_ehdrp->e_ident[EI_MAG3] = ELFMAG3;
4447 i_ehdrp->e_ident[EI_CLASS] = bed->s->elfclass;
4448 i_ehdrp->e_ident[EI_DATA] =
4449 bfd_big_endian (abfd) ? ELFDATA2MSB : ELFDATA2LSB;
4450 i_ehdrp->e_ident[EI_VERSION] = bed->s->ev_current;
4452 if ((abfd->flags & DYNAMIC) != 0)
4453 i_ehdrp->e_type = ET_DYN;
4454 else if ((abfd->flags & EXEC_P) != 0)
4455 i_ehdrp->e_type = ET_EXEC;
4456 else if (bfd_get_format (abfd) == bfd_core)
4457 i_ehdrp->e_type = ET_CORE;
4459 i_ehdrp->e_type = ET_REL;
4461 switch (bfd_get_arch (abfd))
4463 case bfd_arch_unknown:
4464 i_ehdrp->e_machine = EM_NONE;
4467 /* There used to be a long list of cases here, each one setting
4468 e_machine to the same EM_* macro #defined as ELF_MACHINE_CODE
4469 in the corresponding bfd definition. To avoid duplication,
4470 the switch was removed. Machines that need special handling
4471 can generally do it in elf_backend_final_write_processing(),
4472 unless they need the information earlier than the final write.
4473 Such need can generally be supplied by replacing the tests for
4474 e_machine with the conditions used to determine it. */
4476 if (get_elf_backend_data (abfd) != NULL)
4477 i_ehdrp->e_machine = get_elf_backend_data (abfd)->elf_machine_code;
4479 i_ehdrp->e_machine = EM_NONE;
4482 i_ehdrp->e_version = bed->s->ev_current;
4483 i_ehdrp->e_ehsize = bed->s->sizeof_ehdr;
4485 /* No program header, for now. */
4486 i_ehdrp->e_phoff = 0;
4487 i_ehdrp->e_phentsize = 0;
4488 i_ehdrp->e_phnum = 0;
4490 /* Each bfd section is section header entry. */
4491 i_ehdrp->e_entry = bfd_get_start_address (abfd);
4492 i_ehdrp->e_shentsize = bed->s->sizeof_shdr;
4494 /* If we're building an executable, we'll need a program header table. */
4495 if (abfd->flags & EXEC_P)
4497 /* It all happens later. */
4499 i_ehdrp->e_phentsize = sizeof (Elf_External_Phdr);
4501 /* elf_build_phdrs() returns a (NULL-terminated) array of
4502 Elf_Internal_Phdrs. */
4503 i_phdrp = elf_build_phdrs (abfd, i_ehdrp, i_shdrp, &i_ehdrp->e_phnum);
4504 i_ehdrp->e_phoff = outbase;
4505 outbase += i_ehdrp->e_phentsize * i_ehdrp->e_phnum;
4510 i_ehdrp->e_phentsize = 0;
4512 i_ehdrp->e_phoff = 0;
4515 elf_tdata (abfd)->symtab_hdr.sh_name =
4516 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".symtab", FALSE);
4517 elf_tdata (abfd)->strtab_hdr.sh_name =
4518 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".strtab", FALSE);
4519 elf_tdata (abfd)->shstrtab_hdr.sh_name =
4520 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".shstrtab", FALSE);
4521 if (elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
4522 || elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
4523 || elf_tdata (abfd)->shstrtab_hdr.sh_name == (unsigned int) -1)
4529 /* Assign file positions for all the reloc sections which are not part
4530 of the loadable file image. */
4533 _bfd_elf_assign_file_positions_for_relocs (abfd)
4537 unsigned int i, num_sec;
4538 Elf_Internal_Shdr **shdrpp;
4540 off = elf_tdata (abfd)->next_file_pos;
4542 num_sec = elf_numsections (abfd);
4543 for (i = 1, shdrpp = elf_elfsections (abfd) + 1; i < num_sec; i++, shdrpp++)
4545 Elf_Internal_Shdr *shdrp;
4548 if ((shdrp->sh_type == SHT_REL || shdrp->sh_type == SHT_RELA)
4549 && shdrp->sh_offset == -1)
4550 off = _bfd_elf_assign_file_position_for_section (shdrp, off, TRUE);
4553 elf_tdata (abfd)->next_file_pos = off;
4557 _bfd_elf_write_object_contents (abfd)
4560 struct elf_backend_data *bed = get_elf_backend_data (abfd);
4561 Elf_Internal_Ehdr *i_ehdrp;
4562 Elf_Internal_Shdr **i_shdrp;
4564 unsigned int count, num_sec;
4566 if (! abfd->output_has_begun
4567 && ! _bfd_elf_compute_section_file_positions
4568 (abfd, (struct bfd_link_info *) NULL))
4571 i_shdrp = elf_elfsections (abfd);
4572 i_ehdrp = elf_elfheader (abfd);
4575 bfd_map_over_sections (abfd, bed->s->write_relocs, &failed);
4579 _bfd_elf_assign_file_positions_for_relocs (abfd);
4581 /* After writing the headers, we need to write the sections too... */
4582 num_sec = elf_numsections (abfd);
4583 for (count = 1; count < num_sec; count++)
4585 if (bed->elf_backend_section_processing)
4586 (*bed->elf_backend_section_processing) (abfd, i_shdrp[count]);
4587 if (i_shdrp[count]->contents)
4589 bfd_size_type amt = i_shdrp[count]->sh_size;
4591 if (bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET) != 0
4592 || bfd_bwrite (i_shdrp[count]->contents, amt, abfd) != amt)
4595 if (count == SHN_LORESERVE - 1)
4596 count += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4599 /* Write out the section header names. */
4600 if (bfd_seek (abfd, elf_tdata (abfd)->shstrtab_hdr.sh_offset, SEEK_SET) != 0
4601 || ! _bfd_elf_strtab_emit (abfd, elf_shstrtab (abfd)))
4604 if (bed->elf_backend_final_write_processing)
4605 (*bed->elf_backend_final_write_processing) (abfd,
4606 elf_tdata (abfd)->linker);
4608 return bed->s->write_shdrs_and_ehdr (abfd);
4612 _bfd_elf_write_corefile_contents (abfd)
4615 /* Hopefully this can be done just like an object file. */
4616 return _bfd_elf_write_object_contents (abfd);
4619 /* Given a section, search the header to find them. */
4622 _bfd_elf_section_from_bfd_section (abfd, asect)
4626 struct elf_backend_data *bed;
4629 if (elf_section_data (asect) != NULL
4630 && elf_section_data (asect)->this_idx != 0)
4631 return elf_section_data (asect)->this_idx;
4633 if (bfd_is_abs_section (asect))
4635 else if (bfd_is_com_section (asect))
4637 else if (bfd_is_und_section (asect))
4641 Elf_Internal_Shdr **i_shdrp = elf_elfsections (abfd);
4642 int maxindex = elf_numsections (abfd);
4644 for (index = 1; index < maxindex; index++)
4646 Elf_Internal_Shdr *hdr = i_shdrp[index];
4648 if (hdr != NULL && hdr->bfd_section == asect)
4654 bed = get_elf_backend_data (abfd);
4655 if (bed->elf_backend_section_from_bfd_section)
4659 if ((*bed->elf_backend_section_from_bfd_section) (abfd, asect, &retval))
4664 bfd_set_error (bfd_error_nonrepresentable_section);
4669 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
4673 _bfd_elf_symbol_from_bfd_symbol (abfd, asym_ptr_ptr)
4675 asymbol **asym_ptr_ptr;
4677 asymbol *asym_ptr = *asym_ptr_ptr;
4679 flagword flags = asym_ptr->flags;
4681 /* When gas creates relocations against local labels, it creates its
4682 own symbol for the section, but does put the symbol into the
4683 symbol chain, so udata is 0. When the linker is generating
4684 relocatable output, this section symbol may be for one of the
4685 input sections rather than the output section. */
4686 if (asym_ptr->udata.i == 0
4687 && (flags & BSF_SECTION_SYM)
4688 && asym_ptr->section)
4692 if (asym_ptr->section->output_section != NULL)
4693 indx = asym_ptr->section->output_section->index;
4695 indx = asym_ptr->section->index;
4696 if (indx < elf_num_section_syms (abfd)
4697 && elf_section_syms (abfd)[indx] != NULL)
4698 asym_ptr->udata.i = elf_section_syms (abfd)[indx]->udata.i;
4701 idx = asym_ptr->udata.i;
4705 /* This case can occur when using --strip-symbol on a symbol
4706 which is used in a relocation entry. */
4707 (*_bfd_error_handler)
4708 (_("%s: symbol `%s' required but not present"),
4709 bfd_archive_filename (abfd), bfd_asymbol_name (asym_ptr));
4710 bfd_set_error (bfd_error_no_symbols);
4717 "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n",
4718 (long) asym_ptr, asym_ptr->name, idx, flags,
4719 elf_symbol_flags (flags));
4727 /* Copy private BFD data. This copies any program header information. */
4730 copy_private_bfd_data (ibfd, obfd)
4734 Elf_Internal_Ehdr *iehdr;
4735 struct elf_segment_map *map;
4736 struct elf_segment_map *map_first;
4737 struct elf_segment_map **pointer_to_map;
4738 Elf_Internal_Phdr *segment;
4741 unsigned int num_segments;
4742 bfd_boolean phdr_included = FALSE;
4743 bfd_vma maxpagesize;
4744 struct elf_segment_map *phdr_adjust_seg = NULL;
4745 unsigned int phdr_adjust_num = 0;
4746 struct elf_backend_data *bed;
4748 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
4749 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
4752 if (elf_tdata (ibfd)->phdr == NULL)
4755 bed = get_elf_backend_data (ibfd);
4756 iehdr = elf_elfheader (ibfd);
4759 pointer_to_map = &map_first;
4761 num_segments = elf_elfheader (ibfd)->e_phnum;
4762 maxpagesize = get_elf_backend_data (obfd)->maxpagesize;
4764 /* Returns the end address of the segment + 1. */
4765 #define SEGMENT_END(segment, start) \
4766 (start + (segment->p_memsz > segment->p_filesz \
4767 ? segment->p_memsz : segment->p_filesz))
4769 #define SECTION_SIZE(section, segment) \
4770 (((section->flags & (SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) \
4771 != SEC_THREAD_LOCAL || segment->p_type == PT_TLS) \
4772 ? section->_raw_size : 0)
4774 /* Returns TRUE if the given section is contained within
4775 the given segment. VMA addresses are compared. */
4776 #define IS_CONTAINED_BY_VMA(section, segment) \
4777 (section->vma >= segment->p_vaddr \
4778 && (section->vma + SECTION_SIZE (section, segment) \
4779 <= (SEGMENT_END (segment, segment->p_vaddr))))
4781 /* Returns TRUE if the given section is contained within
4782 the given segment. LMA addresses are compared. */
4783 #define IS_CONTAINED_BY_LMA(section, segment, base) \
4784 (section->lma >= base \
4785 && (section->lma + SECTION_SIZE (section, segment) \
4786 <= SEGMENT_END (segment, base)))
4788 /* Special case: corefile "NOTE" section containing regs, prpsinfo etc. */
4789 #define IS_COREFILE_NOTE(p, s) \
4790 (p->p_type == PT_NOTE \
4791 && bfd_get_format (ibfd) == bfd_core \
4792 && s->vma == 0 && s->lma == 0 \
4793 && (bfd_vma) s->filepos >= p->p_offset \
4794 && ((bfd_vma) s->filepos + s->_raw_size \
4795 <= p->p_offset + p->p_filesz))
4797 /* The complicated case when p_vaddr is 0 is to handle the Solaris
4798 linker, which generates a PT_INTERP section with p_vaddr and
4799 p_memsz set to 0. */
4800 #define IS_SOLARIS_PT_INTERP(p, s) \
4802 && p->p_paddr == 0 \
4803 && p->p_memsz == 0 \
4804 && p->p_filesz > 0 \
4805 && (s->flags & SEC_HAS_CONTENTS) != 0 \
4806 && s->_raw_size > 0 \
4807 && (bfd_vma) s->filepos >= p->p_offset \
4808 && ((bfd_vma) s->filepos + s->_raw_size \
4809 <= p->p_offset + p->p_filesz))
4811 /* Decide if the given section should be included in the given segment.
4812 A section will be included if:
4813 1. It is within the address space of the segment -- we use the LMA
4814 if that is set for the segment and the VMA otherwise,
4815 2. It is an allocated segment,
4816 3. There is an output section associated with it,
4817 4. The section has not already been allocated to a previous segment.
4818 5. PT_TLS segment includes only SHF_TLS sections.
4819 6. SHF_TLS sections are only in PT_TLS or PT_LOAD segments. */
4820 #define INCLUDE_SECTION_IN_SEGMENT(section, segment, bed) \
4821 ((((segment->p_paddr \
4822 ? IS_CONTAINED_BY_LMA (section, segment, segment->p_paddr) \
4823 : IS_CONTAINED_BY_VMA (section, segment)) \
4824 && (section->flags & SEC_ALLOC) != 0) \
4825 || IS_COREFILE_NOTE (segment, section)) \
4826 && section->output_section != NULL \
4827 && (segment->p_type != PT_TLS \
4828 || (section->flags & SEC_THREAD_LOCAL)) \
4829 && (segment->p_type == PT_LOAD \
4830 || segment->p_type == PT_TLS \
4831 || (section->flags & SEC_THREAD_LOCAL) == 0) \
4832 && ! section->segment_mark)
4834 /* Returns TRUE iff seg1 starts after the end of seg2. */
4835 #define SEGMENT_AFTER_SEGMENT(seg1, seg2, field) \
4836 (seg1->field >= SEGMENT_END (seg2, seg2->field))
4838 /* Returns TRUE iff seg1 and seg2 overlap. Segments overlap iff both
4839 their VMA address ranges and their LMA address ranges overlap.
4840 It is possible to have overlapping VMA ranges without overlapping LMA
4841 ranges. RedBoot images for example can have both .data and .bss mapped
4842 to the same VMA range, but with the .data section mapped to a different
4844 #define SEGMENT_OVERLAPS(seg1, seg2) \
4845 ( !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_vaddr) \
4846 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_vaddr)) \
4847 && !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_paddr) \
4848 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_paddr)))
4850 /* Initialise the segment mark field. */
4851 for (section = ibfd->sections; section != NULL; section = section->next)
4852 section->segment_mark = FALSE;
4854 /* Scan through the segments specified in the program header
4855 of the input BFD. For this first scan we look for overlaps
4856 in the loadable segments. These can be created by weird
4857 parameters to objcopy. Also, fix some solaris weirdness. */
4858 for (i = 0, segment = elf_tdata (ibfd)->phdr;
4863 Elf_Internal_Phdr *segment2;
4865 if (segment->p_type == PT_INTERP)
4866 for (section = ibfd->sections; section; section = section->next)
4867 if (IS_SOLARIS_PT_INTERP (segment, section))
4869 /* Mininal change so that the normal section to segment
4870 assigment code will work. */
4871 segment->p_vaddr = section->vma;
4875 if (segment->p_type != PT_LOAD)
4878 /* Determine if this segment overlaps any previous segments. */
4879 for (j = 0, segment2 = elf_tdata (ibfd)->phdr; j < i; j++, segment2 ++)
4881 bfd_signed_vma extra_length;
4883 if (segment2->p_type != PT_LOAD
4884 || ! SEGMENT_OVERLAPS (segment, segment2))
4887 /* Merge the two segments together. */
4888 if (segment2->p_vaddr < segment->p_vaddr)
4890 /* Extend SEGMENT2 to include SEGMENT and then delete
4893 SEGMENT_END (segment, segment->p_vaddr)
4894 - SEGMENT_END (segment2, segment2->p_vaddr);
4896 if (extra_length > 0)
4898 segment2->p_memsz += extra_length;
4899 segment2->p_filesz += extra_length;
4902 segment->p_type = PT_NULL;
4904 /* Since we have deleted P we must restart the outer loop. */
4906 segment = elf_tdata (ibfd)->phdr;
4911 /* Extend SEGMENT to include SEGMENT2 and then delete
4914 SEGMENT_END (segment2, segment2->p_vaddr)
4915 - SEGMENT_END (segment, segment->p_vaddr);
4917 if (extra_length > 0)
4919 segment->p_memsz += extra_length;
4920 segment->p_filesz += extra_length;
4923 segment2->p_type = PT_NULL;
4928 /* The second scan attempts to assign sections to segments. */
4929 for (i = 0, segment = elf_tdata (ibfd)->phdr;
4933 unsigned int section_count;
4934 asection ** sections;
4935 asection * output_section;
4937 bfd_vma matching_lma;
4938 bfd_vma suggested_lma;
4942 if (segment->p_type == PT_NULL)
4945 /* Compute how many sections might be placed into this segment. */
4946 for (section = ibfd->sections, section_count = 0;
4948 section = section->next)
4949 if (INCLUDE_SECTION_IN_SEGMENT (section, segment, bed))
4952 /* Allocate a segment map big enough to contain
4953 all of the sections we have selected. */
4954 amt = sizeof (struct elf_segment_map);
4955 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
4956 map = (struct elf_segment_map *) bfd_alloc (obfd, amt);
4960 /* Initialise the fields of the segment map. Default to
4961 using the physical address of the segment in the input BFD. */
4963 map->p_type = segment->p_type;
4964 map->p_flags = segment->p_flags;
4965 map->p_flags_valid = 1;
4966 map->p_paddr = segment->p_paddr;
4967 map->p_paddr_valid = 1;
4969 /* Determine if this segment contains the ELF file header
4970 and if it contains the program headers themselves. */
4971 map->includes_filehdr = (segment->p_offset == 0
4972 && segment->p_filesz >= iehdr->e_ehsize);
4974 map->includes_phdrs = 0;
4976 if (! phdr_included || segment->p_type != PT_LOAD)
4978 map->includes_phdrs =
4979 (segment->p_offset <= (bfd_vma) iehdr->e_phoff
4980 && (segment->p_offset + segment->p_filesz
4981 >= ((bfd_vma) iehdr->e_phoff
4982 + iehdr->e_phnum * iehdr->e_phentsize)));
4984 if (segment->p_type == PT_LOAD && map->includes_phdrs)
4985 phdr_included = TRUE;
4988 if (section_count == 0)
4990 /* Special segments, such as the PT_PHDR segment, may contain
4991 no sections, but ordinary, loadable segments should contain
4992 something. They are allowed by the ELF spec however, so only
4993 a warning is produced. */
4994 if (segment->p_type == PT_LOAD)
4995 (*_bfd_error_handler)
4996 (_("%s: warning: Empty loadable segment detected, is this intentional ?\n"),
4997 bfd_archive_filename (ibfd));
5000 *pointer_to_map = map;
5001 pointer_to_map = &map->next;
5006 /* Now scan the sections in the input BFD again and attempt
5007 to add their corresponding output sections to the segment map.
5008 The problem here is how to handle an output section which has
5009 been moved (ie had its LMA changed). There are four possibilities:
5011 1. None of the sections have been moved.
5012 In this case we can continue to use the segment LMA from the
5015 2. All of the sections have been moved by the same amount.
5016 In this case we can change the segment's LMA to match the LMA
5017 of the first section.
5019 3. Some of the sections have been moved, others have not.
5020 In this case those sections which have not been moved can be
5021 placed in the current segment which will have to have its size,
5022 and possibly its LMA changed, and a new segment or segments will
5023 have to be created to contain the other sections.
5025 4. The sections have been moved, but not by the same amount.
5026 In this case we can change the segment's LMA to match the LMA
5027 of the first section and we will have to create a new segment
5028 or segments to contain the other sections.
5030 In order to save time, we allocate an array to hold the section
5031 pointers that we are interested in. As these sections get assigned
5032 to a segment, they are removed from this array. */
5034 /* Gcc 2.96 miscompiles this code on mips. Don't do casting here
5035 to work around this long long bug. */
5036 amt = section_count * sizeof (asection *);
5037 sections = (asection **) bfd_malloc (amt);
5038 if (sections == NULL)
5041 /* Step One: Scan for segment vs section LMA conflicts.
5042 Also add the sections to the section array allocated above.
5043 Also add the sections to the current segment. In the common
5044 case, where the sections have not been moved, this means that
5045 we have completely filled the segment, and there is nothing
5051 for (j = 0, section = ibfd->sections;
5053 section = section->next)
5055 if (INCLUDE_SECTION_IN_SEGMENT (section, segment, bed))
5057 output_section = section->output_section;
5059 sections[j ++] = section;
5061 /* The Solaris native linker always sets p_paddr to 0.
5062 We try to catch that case here, and set it to the
5063 correct value. Note - some backends require that
5064 p_paddr be left as zero. */
5065 if (segment->p_paddr == 0
5066 && segment->p_vaddr != 0
5067 && (! bed->want_p_paddr_set_to_zero)
5069 && output_section->lma != 0
5070 && (output_section->vma == (segment->p_vaddr
5071 + (map->includes_filehdr
5074 + (map->includes_phdrs
5076 * iehdr->e_phentsize)
5078 map->p_paddr = segment->p_vaddr;
5080 /* Match up the physical address of the segment with the
5081 LMA address of the output section. */
5082 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
5083 || IS_COREFILE_NOTE (segment, section)
5084 || (bed->want_p_paddr_set_to_zero &&
5085 IS_CONTAINED_BY_VMA (output_section, segment))
5088 if (matching_lma == 0)
5089 matching_lma = output_section->lma;
5091 /* We assume that if the section fits within the segment
5092 then it does not overlap any other section within that
5094 map->sections[isec ++] = output_section;
5096 else if (suggested_lma == 0)
5097 suggested_lma = output_section->lma;
5101 BFD_ASSERT (j == section_count);
5103 /* Step Two: Adjust the physical address of the current segment,
5105 if (isec == section_count)
5107 /* All of the sections fitted within the segment as currently
5108 specified. This is the default case. Add the segment to
5109 the list of built segments and carry on to process the next
5110 program header in the input BFD. */
5111 map->count = section_count;
5112 *pointer_to_map = map;
5113 pointer_to_map = &map->next;
5120 if (matching_lma != 0)
5122 /* At least one section fits inside the current segment.
5123 Keep it, but modify its physical address to match the
5124 LMA of the first section that fitted. */
5125 map->p_paddr = matching_lma;
5129 /* None of the sections fitted inside the current segment.
5130 Change the current segment's physical address to match
5131 the LMA of the first section. */
5132 map->p_paddr = suggested_lma;
5135 /* Offset the segment physical address from the lma
5136 to allow for space taken up by elf headers. */
5137 if (map->includes_filehdr)
5138 map->p_paddr -= iehdr->e_ehsize;
5140 if (map->includes_phdrs)
5142 map->p_paddr -= iehdr->e_phnum * iehdr->e_phentsize;
5144 /* iehdr->e_phnum is just an estimate of the number
5145 of program headers that we will need. Make a note
5146 here of the number we used and the segment we chose
5147 to hold these headers, so that we can adjust the
5148 offset when we know the correct value. */
5149 phdr_adjust_num = iehdr->e_phnum;
5150 phdr_adjust_seg = map;
5154 /* Step Three: Loop over the sections again, this time assigning
5155 those that fit to the current segment and removing them from the
5156 sections array; but making sure not to leave large gaps. Once all
5157 possible sections have been assigned to the current segment it is
5158 added to the list of built segments and if sections still remain
5159 to be assigned, a new segment is constructed before repeating
5167 /* Fill the current segment with sections that fit. */
5168 for (j = 0; j < section_count; j++)
5170 section = sections[j];
5172 if (section == NULL)
5175 output_section = section->output_section;
5177 BFD_ASSERT (output_section != NULL);
5179 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
5180 || IS_COREFILE_NOTE (segment, section))
5182 if (map->count == 0)
5184 /* If the first section in a segment does not start at
5185 the beginning of the segment, then something is
5187 if (output_section->lma !=
5189 + (map->includes_filehdr ? iehdr->e_ehsize : 0)
5190 + (map->includes_phdrs
5191 ? iehdr->e_phnum * iehdr->e_phentsize
5197 asection * prev_sec;
5199 prev_sec = map->sections[map->count - 1];
5201 /* If the gap between the end of the previous section
5202 and the start of this section is more than
5203 maxpagesize then we need to start a new segment. */
5204 if ((BFD_ALIGN (prev_sec->lma + prev_sec->_raw_size,
5206 < BFD_ALIGN (output_section->lma, maxpagesize))
5207 || ((prev_sec->lma + prev_sec->_raw_size)
5208 > output_section->lma))
5210 if (suggested_lma == 0)
5211 suggested_lma = output_section->lma;
5217 map->sections[map->count++] = output_section;
5220 section->segment_mark = TRUE;
5222 else if (suggested_lma == 0)
5223 suggested_lma = output_section->lma;
5226 BFD_ASSERT (map->count > 0);
5228 /* Add the current segment to the list of built segments. */
5229 *pointer_to_map = map;
5230 pointer_to_map = &map->next;
5232 if (isec < section_count)
5234 /* We still have not allocated all of the sections to
5235 segments. Create a new segment here, initialise it
5236 and carry on looping. */
5237 amt = sizeof (struct elf_segment_map);
5238 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
5239 map = (struct elf_segment_map *) bfd_alloc (obfd, amt);
5246 /* Initialise the fields of the segment map. Set the physical
5247 physical address to the LMA of the first section that has
5248 not yet been assigned. */
5250 map->p_type = segment->p_type;
5251 map->p_flags = segment->p_flags;
5252 map->p_flags_valid = 1;
5253 map->p_paddr = suggested_lma;
5254 map->p_paddr_valid = 1;
5255 map->includes_filehdr = 0;
5256 map->includes_phdrs = 0;
5259 while (isec < section_count);
5264 /* The Solaris linker creates program headers in which all the
5265 p_paddr fields are zero. When we try to objcopy or strip such a
5266 file, we get confused. Check for this case, and if we find it
5267 reset the p_paddr_valid fields. */
5268 for (map = map_first; map != NULL; map = map->next)
5269 if (map->p_paddr != 0)
5272 for (map = map_first; map != NULL; map = map->next)
5273 map->p_paddr_valid = 0;
5275 elf_tdata (obfd)->segment_map = map_first;
5277 /* If we had to estimate the number of program headers that were
5278 going to be needed, then check our estimate now and adjust
5279 the offset if necessary. */
5280 if (phdr_adjust_seg != NULL)
5284 for (count = 0, map = map_first; map != NULL; map = map->next)
5287 if (count > phdr_adjust_num)
5288 phdr_adjust_seg->p_paddr
5289 -= (count - phdr_adjust_num) * iehdr->e_phentsize;
5293 /* Final Step: Sort the segments into ascending order of physical
5295 if (map_first != NULL)
5297 struct elf_segment_map *prev;
5300 for (map = map_first->next; map != NULL; prev = map, map = map->next)
5302 /* Yes I know - its a bubble sort.... */
5303 if (map->next != NULL && (map->next->p_paddr < map->p_paddr))
5305 /* Swap map and map->next. */
5306 prev->next = map->next;
5307 map->next = map->next->next;
5308 prev->next->next = map;
5319 #undef IS_CONTAINED_BY_VMA
5320 #undef IS_CONTAINED_BY_LMA
5321 #undef IS_COREFILE_NOTE
5322 #undef IS_SOLARIS_PT_INTERP
5323 #undef INCLUDE_SECTION_IN_SEGMENT
5324 #undef SEGMENT_AFTER_SEGMENT
5325 #undef SEGMENT_OVERLAPS
5329 /* Copy private section information. This copies over the entsize
5330 field, and sometimes the info field. */
5333 _bfd_elf_copy_private_section_data (ibfd, isec, obfd, osec)
5339 Elf_Internal_Shdr *ihdr, *ohdr;
5341 if (ibfd->xvec->flavour != bfd_target_elf_flavour
5342 || obfd->xvec->flavour != bfd_target_elf_flavour)
5345 if (elf_tdata (obfd)->segment_map == NULL && elf_tdata (ibfd)->phdr != NULL)
5349 /* Only set up the segments if there are no more SEC_ALLOC
5350 sections. FIXME: This won't do the right thing if objcopy is
5351 used to remove the last SEC_ALLOC section, since objcopy
5352 won't call this routine in that case. */
5353 for (s = isec->next; s != NULL; s = s->next)
5354 if ((s->flags & SEC_ALLOC) != 0)
5358 if (! copy_private_bfd_data (ibfd, obfd))
5363 ihdr = &elf_section_data (isec)->this_hdr;
5364 ohdr = &elf_section_data (osec)->this_hdr;
5366 ohdr->sh_entsize = ihdr->sh_entsize;
5368 if (ihdr->sh_type == SHT_SYMTAB
5369 || ihdr->sh_type == SHT_DYNSYM
5370 || ihdr->sh_type == SHT_GNU_verneed
5371 || ihdr->sh_type == SHT_GNU_verdef)
5372 ohdr->sh_info = ihdr->sh_info;
5374 /* Set things up for objcopy. The output SHT_GROUP section will
5375 have its elf_next_in_group pointing back to the input group
5377 elf_next_in_group (osec) = elf_next_in_group (isec);
5378 elf_group_name (osec) = elf_group_name (isec);
5380 osec->use_rela_p = isec->use_rela_p;
5385 /* Copy private symbol information. If this symbol is in a section
5386 which we did not map into a BFD section, try to map the section
5387 index correctly. We use special macro definitions for the mapped
5388 section indices; these definitions are interpreted by the
5389 swap_out_syms function. */
5391 #define MAP_ONESYMTAB (SHN_HIOS + 1)
5392 #define MAP_DYNSYMTAB (SHN_HIOS + 2)
5393 #define MAP_STRTAB (SHN_HIOS + 3)
5394 #define MAP_SHSTRTAB (SHN_HIOS + 4)
5395 #define MAP_SYM_SHNDX (SHN_HIOS + 5)
5398 _bfd_elf_copy_private_symbol_data (ibfd, isymarg, obfd, osymarg)
5404 elf_symbol_type *isym, *osym;
5406 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
5407 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
5410 isym = elf_symbol_from (ibfd, isymarg);
5411 osym = elf_symbol_from (obfd, osymarg);
5415 && bfd_is_abs_section (isym->symbol.section))
5419 shndx = isym->internal_elf_sym.st_shndx;
5420 if (shndx == elf_onesymtab (ibfd))
5421 shndx = MAP_ONESYMTAB;
5422 else if (shndx == elf_dynsymtab (ibfd))
5423 shndx = MAP_DYNSYMTAB;
5424 else if (shndx == elf_tdata (ibfd)->strtab_section)
5426 else if (shndx == elf_tdata (ibfd)->shstrtab_section)
5427 shndx = MAP_SHSTRTAB;
5428 else if (shndx == elf_tdata (ibfd)->symtab_shndx_section)
5429 shndx = MAP_SYM_SHNDX;
5430 osym->internal_elf_sym.st_shndx = shndx;
5436 /* Swap out the symbols. */
5439 swap_out_syms (abfd, sttp, relocatable_p)
5441 struct bfd_strtab_hash **sttp;
5444 struct elf_backend_data *bed;
5447 struct bfd_strtab_hash *stt;
5448 Elf_Internal_Shdr *symtab_hdr;
5449 Elf_Internal_Shdr *symtab_shndx_hdr;
5450 Elf_Internal_Shdr *symstrtab_hdr;
5451 char *outbound_syms;
5452 char *outbound_shndx;
5456 if (!elf_map_symbols (abfd))
5459 /* Dump out the symtabs. */
5460 stt = _bfd_elf_stringtab_init ();
5464 bed = get_elf_backend_data (abfd);
5465 symcount = bfd_get_symcount (abfd);
5466 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5467 symtab_hdr->sh_type = SHT_SYMTAB;
5468 symtab_hdr->sh_entsize = bed->s->sizeof_sym;
5469 symtab_hdr->sh_size = symtab_hdr->sh_entsize * (symcount + 1);
5470 symtab_hdr->sh_info = elf_num_locals (abfd) + 1;
5471 symtab_hdr->sh_addralign = 1 << bed->s->log_file_align;
5473 symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr;
5474 symstrtab_hdr->sh_type = SHT_STRTAB;
5476 amt = (bfd_size_type) (1 + symcount) * bed->s->sizeof_sym;
5477 outbound_syms = bfd_alloc (abfd, amt);
5478 if (outbound_syms == NULL)
5480 _bfd_stringtab_free (stt);
5483 symtab_hdr->contents = (PTR) outbound_syms;
5485 outbound_shndx = NULL;
5486 symtab_shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
5487 if (symtab_shndx_hdr->sh_name != 0)
5489 amt = (bfd_size_type) (1 + symcount) * sizeof (Elf_External_Sym_Shndx);
5490 outbound_shndx = bfd_zalloc (abfd, amt);
5491 if (outbound_shndx == NULL)
5493 _bfd_stringtab_free (stt);
5497 symtab_shndx_hdr->contents = outbound_shndx;
5498 symtab_shndx_hdr->sh_type = SHT_SYMTAB_SHNDX;
5499 symtab_shndx_hdr->sh_size = amt;
5500 symtab_shndx_hdr->sh_addralign = sizeof (Elf_External_Sym_Shndx);
5501 symtab_shndx_hdr->sh_entsize = sizeof (Elf_External_Sym_Shndx);
5504 /* Now generate the data (for "contents"). */
5506 /* Fill in zeroth symbol and swap it out. */
5507 Elf_Internal_Sym sym;
5513 sym.st_shndx = SHN_UNDEF;
5514 bed->s->swap_symbol_out (abfd, &sym, outbound_syms, outbound_shndx);
5515 outbound_syms += bed->s->sizeof_sym;
5516 if (outbound_shndx != NULL)
5517 outbound_shndx += sizeof (Elf_External_Sym_Shndx);
5520 syms = bfd_get_outsymbols (abfd);
5521 for (idx = 0; idx < symcount; idx++)
5523 Elf_Internal_Sym sym;
5524 bfd_vma value = syms[idx]->value;
5525 elf_symbol_type *type_ptr;
5526 flagword flags = syms[idx]->flags;
5529 if ((flags & (BSF_SECTION_SYM | BSF_GLOBAL)) == BSF_SECTION_SYM)
5531 /* Local section symbols have no name. */
5536 sym.st_name = (unsigned long) _bfd_stringtab_add (stt,
5539 if (sym.st_name == (unsigned long) -1)
5541 _bfd_stringtab_free (stt);
5546 type_ptr = elf_symbol_from (abfd, syms[idx]);
5548 if ((flags & BSF_SECTION_SYM) == 0
5549 && bfd_is_com_section (syms[idx]->section))
5551 /* ELF common symbols put the alignment into the `value' field,
5552 and the size into the `size' field. This is backwards from
5553 how BFD handles it, so reverse it here. */
5554 sym.st_size = value;
5555 if (type_ptr == NULL
5556 || type_ptr->internal_elf_sym.st_value == 0)
5557 sym.st_value = value >= 16 ? 16 : (1 << bfd_log2 (value));
5559 sym.st_value = type_ptr->internal_elf_sym.st_value;
5560 sym.st_shndx = _bfd_elf_section_from_bfd_section
5561 (abfd, syms[idx]->section);
5565 asection *sec = syms[idx]->section;
5568 if (sec->output_section)
5570 value += sec->output_offset;
5571 sec = sec->output_section;
5574 /* Don't add in the section vma for relocatable output. */
5575 if (! relocatable_p)
5577 sym.st_value = value;
5578 sym.st_size = type_ptr ? type_ptr->internal_elf_sym.st_size : 0;
5580 if (bfd_is_abs_section (sec)
5582 && type_ptr->internal_elf_sym.st_shndx != 0)
5584 /* This symbol is in a real ELF section which we did
5585 not create as a BFD section. Undo the mapping done
5586 by copy_private_symbol_data. */
5587 shndx = type_ptr->internal_elf_sym.st_shndx;
5591 shndx = elf_onesymtab (abfd);
5594 shndx = elf_dynsymtab (abfd);
5597 shndx = elf_tdata (abfd)->strtab_section;
5600 shndx = elf_tdata (abfd)->shstrtab_section;
5603 shndx = elf_tdata (abfd)->symtab_shndx_section;
5611 shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
5617 /* Writing this would be a hell of a lot easier if
5618 we had some decent documentation on bfd, and
5619 knew what to expect of the library, and what to
5620 demand of applications. For example, it
5621 appears that `objcopy' might not set the
5622 section of a symbol to be a section that is
5623 actually in the output file. */
5624 sec2 = bfd_get_section_by_name (abfd, sec->name);
5627 _bfd_error_handler (_("\
5628 Unable to find equivalent output section for symbol '%s' from section '%s'"),
5629 syms[idx]->name ? syms[idx]->name : "<Local sym>",
5631 bfd_set_error (bfd_error_invalid_operation);
5632 _bfd_stringtab_free (stt);
5636 shndx = _bfd_elf_section_from_bfd_section (abfd, sec2);
5637 BFD_ASSERT (shndx != -1);
5641 sym.st_shndx = shndx;
5644 if ((flags & BSF_THREAD_LOCAL) != 0)
5646 else if ((flags & BSF_FUNCTION) != 0)
5648 else if ((flags & BSF_OBJECT) != 0)
5653 if (syms[idx]->section->flags & SEC_THREAD_LOCAL)
5656 /* Processor-specific types. */
5657 if (type_ptr != NULL
5658 && bed->elf_backend_get_symbol_type)
5659 type = ((*bed->elf_backend_get_symbol_type)
5660 (&type_ptr->internal_elf_sym, type));
5662 if (flags & BSF_SECTION_SYM)
5664 if (flags & BSF_GLOBAL)
5665 sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION);
5667 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
5669 else if (bfd_is_com_section (syms[idx]->section))
5670 sym.st_info = ELF_ST_INFO (STB_GLOBAL, type);
5671 else if (bfd_is_und_section (syms[idx]->section))
5672 sym.st_info = ELF_ST_INFO (((flags & BSF_WEAK)
5676 else if (flags & BSF_FILE)
5677 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE);
5680 int bind = STB_LOCAL;
5682 if (flags & BSF_LOCAL)
5684 else if (flags & BSF_WEAK)
5686 else if (flags & BSF_GLOBAL)
5689 sym.st_info = ELF_ST_INFO (bind, type);
5692 if (type_ptr != NULL)
5693 sym.st_other = type_ptr->internal_elf_sym.st_other;
5697 bed->s->swap_symbol_out (abfd, &sym, outbound_syms, outbound_shndx);
5698 outbound_syms += bed->s->sizeof_sym;
5699 if (outbound_shndx != NULL)
5700 outbound_shndx += sizeof (Elf_External_Sym_Shndx);
5704 symstrtab_hdr->sh_size = _bfd_stringtab_size (stt);
5705 symstrtab_hdr->sh_type = SHT_STRTAB;
5707 symstrtab_hdr->sh_flags = 0;
5708 symstrtab_hdr->sh_addr = 0;
5709 symstrtab_hdr->sh_entsize = 0;
5710 symstrtab_hdr->sh_link = 0;
5711 symstrtab_hdr->sh_info = 0;
5712 symstrtab_hdr->sh_addralign = 1;
5717 /* Return the number of bytes required to hold the symtab vector.
5719 Note that we base it on the count plus 1, since we will null terminate
5720 the vector allocated based on this size. However, the ELF symbol table
5721 always has a dummy entry as symbol #0, so it ends up even. */
5724 _bfd_elf_get_symtab_upper_bound (abfd)
5729 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->symtab_hdr;
5731 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
5732 symtab_size = (symcount + 1) * (sizeof (asymbol *));
5734 symtab_size -= sizeof (asymbol *);
5740 _bfd_elf_get_dynamic_symtab_upper_bound (abfd)
5745 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->dynsymtab_hdr;
5747 if (elf_dynsymtab (abfd) == 0)
5749 bfd_set_error (bfd_error_invalid_operation);
5753 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
5754 symtab_size = (symcount + 1) * (sizeof (asymbol *));
5756 symtab_size -= sizeof (asymbol *);
5762 _bfd_elf_get_reloc_upper_bound (abfd, asect)
5763 bfd *abfd ATTRIBUTE_UNUSED;
5766 return (asect->reloc_count + 1) * sizeof (arelent *);
5769 /* Canonicalize the relocs. */
5772 _bfd_elf_canonicalize_reloc (abfd, section, relptr, symbols)
5780 struct elf_backend_data *bed = get_elf_backend_data (abfd);
5782 if (! bed->s->slurp_reloc_table (abfd, section, symbols, FALSE))
5785 tblptr = section->relocation;
5786 for (i = 0; i < section->reloc_count; i++)
5787 *relptr++ = tblptr++;
5791 return section->reloc_count;
5795 _bfd_elf_get_symtab (abfd, alocation)
5797 asymbol **alocation;
5799 struct elf_backend_data *bed = get_elf_backend_data (abfd);
5800 long symcount = bed->s->slurp_symbol_table (abfd, alocation, FALSE);
5803 bfd_get_symcount (abfd) = symcount;
5808 _bfd_elf_canonicalize_dynamic_symtab (abfd, alocation)
5810 asymbol **alocation;
5812 struct elf_backend_data *bed = get_elf_backend_data (abfd);
5813 long symcount = bed->s->slurp_symbol_table (abfd, alocation, TRUE);
5816 bfd_get_dynamic_symcount (abfd) = symcount;
5820 /* Return the size required for the dynamic reloc entries. Any
5821 section that was actually installed in the BFD, and has type
5822 SHT_REL or SHT_RELA, and uses the dynamic symbol table, is
5823 considered to be a dynamic reloc section. */
5826 _bfd_elf_get_dynamic_reloc_upper_bound (abfd)
5832 if (elf_dynsymtab (abfd) == 0)
5834 bfd_set_error (bfd_error_invalid_operation);
5838 ret = sizeof (arelent *);
5839 for (s = abfd->sections; s != NULL; s = s->next)
5840 if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
5841 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
5842 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
5843 ret += ((s->_raw_size / elf_section_data (s)->this_hdr.sh_entsize)
5844 * sizeof (arelent *));
5849 /* Canonicalize the dynamic relocation entries. Note that we return
5850 the dynamic relocations as a single block, although they are
5851 actually associated with particular sections; the interface, which
5852 was designed for SunOS style shared libraries, expects that there
5853 is only one set of dynamic relocs. Any section that was actually
5854 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses
5855 the dynamic symbol table, is considered to be a dynamic reloc
5859 _bfd_elf_canonicalize_dynamic_reloc (abfd, storage, syms)
5864 bfd_boolean (*slurp_relocs)
5865 PARAMS ((bfd *, asection *, asymbol **, bfd_boolean));
5869 if (elf_dynsymtab (abfd) == 0)
5871 bfd_set_error (bfd_error_invalid_operation);
5875 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
5877 for (s = abfd->sections; s != NULL; s = s->next)
5879 if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
5880 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
5881 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
5886 if (! (*slurp_relocs) (abfd, s, syms, TRUE))
5888 count = s->_raw_size / elf_section_data (s)->this_hdr.sh_entsize;
5890 for (i = 0; i < count; i++)
5901 /* Read in the version information. */
5904 _bfd_elf_slurp_version_tables (abfd)
5907 bfd_byte *contents = NULL;
5910 if (elf_dynverdef (abfd) != 0)
5912 Elf_Internal_Shdr *hdr;
5913 Elf_External_Verdef *everdef;
5914 Elf_Internal_Verdef *iverdef;
5915 Elf_Internal_Verdef *iverdefarr;
5916 Elf_Internal_Verdef iverdefmem;
5918 unsigned int maxidx;
5920 hdr = &elf_tdata (abfd)->dynverdef_hdr;
5922 contents = (bfd_byte *) bfd_malloc (hdr->sh_size);
5923 if (contents == NULL)
5925 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
5926 || bfd_bread ((PTR) contents, hdr->sh_size, abfd) != hdr->sh_size)
5929 /* We know the number of entries in the section but not the maximum
5930 index. Therefore we have to run through all entries and find
5932 everdef = (Elf_External_Verdef *) contents;
5934 for (i = 0; i < hdr->sh_info; ++i)
5936 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
5938 if ((iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION)) > maxidx)
5939 maxidx = iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION);
5941 everdef = ((Elf_External_Verdef *)
5942 ((bfd_byte *) everdef + iverdefmem.vd_next));
5945 amt = (bfd_size_type) maxidx * sizeof (Elf_Internal_Verdef);
5946 elf_tdata (abfd)->verdef = (Elf_Internal_Verdef *) bfd_zalloc (abfd, amt);
5947 if (elf_tdata (abfd)->verdef == NULL)
5950 elf_tdata (abfd)->cverdefs = maxidx;
5952 everdef = (Elf_External_Verdef *) contents;
5953 iverdefarr = elf_tdata (abfd)->verdef;
5954 for (i = 0; i < hdr->sh_info; i++)
5956 Elf_External_Verdaux *everdaux;
5957 Elf_Internal_Verdaux *iverdaux;
5960 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
5962 iverdef = &iverdefarr[(iverdefmem.vd_ndx & VERSYM_VERSION) - 1];
5963 memcpy (iverdef, &iverdefmem, sizeof (Elf_Internal_Verdef));
5965 iverdef->vd_bfd = abfd;
5967 amt = (bfd_size_type) iverdef->vd_cnt * sizeof (Elf_Internal_Verdaux);
5968 iverdef->vd_auxptr = (Elf_Internal_Verdaux *) bfd_alloc (abfd, amt);
5969 if (iverdef->vd_auxptr == NULL)
5972 everdaux = ((Elf_External_Verdaux *)
5973 ((bfd_byte *) everdef + iverdef->vd_aux));
5974 iverdaux = iverdef->vd_auxptr;
5975 for (j = 0; j < iverdef->vd_cnt; j++, iverdaux++)
5977 _bfd_elf_swap_verdaux_in (abfd, everdaux, iverdaux);
5979 iverdaux->vda_nodename =
5980 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
5981 iverdaux->vda_name);
5982 if (iverdaux->vda_nodename == NULL)
5985 if (j + 1 < iverdef->vd_cnt)
5986 iverdaux->vda_nextptr = iverdaux + 1;
5988 iverdaux->vda_nextptr = NULL;
5990 everdaux = ((Elf_External_Verdaux *)
5991 ((bfd_byte *) everdaux + iverdaux->vda_next));
5994 iverdef->vd_nodename = iverdef->vd_auxptr->vda_nodename;
5996 if (i + 1 < hdr->sh_info)
5997 iverdef->vd_nextdef = iverdef + 1;
5999 iverdef->vd_nextdef = NULL;
6001 everdef = ((Elf_External_Verdef *)
6002 ((bfd_byte *) everdef + iverdef->vd_next));
6009 if (elf_dynverref (abfd) != 0)
6011 Elf_Internal_Shdr *hdr;
6012 Elf_External_Verneed *everneed;
6013 Elf_Internal_Verneed *iverneed;
6016 hdr = &elf_tdata (abfd)->dynverref_hdr;
6018 amt = (bfd_size_type) hdr->sh_info * sizeof (Elf_Internal_Verneed);
6019 elf_tdata (abfd)->verref =
6020 (Elf_Internal_Verneed *) bfd_zalloc (abfd, amt);
6021 if (elf_tdata (abfd)->verref == NULL)
6024 elf_tdata (abfd)->cverrefs = hdr->sh_info;
6026 contents = (bfd_byte *) bfd_malloc (hdr->sh_size);
6027 if (contents == NULL)
6029 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
6030 || bfd_bread ((PTR) contents, hdr->sh_size, abfd) != hdr->sh_size)
6033 everneed = (Elf_External_Verneed *) contents;
6034 iverneed = elf_tdata (abfd)->verref;
6035 for (i = 0; i < hdr->sh_info; i++, iverneed++)
6037 Elf_External_Vernaux *evernaux;
6038 Elf_Internal_Vernaux *ivernaux;
6041 _bfd_elf_swap_verneed_in (abfd, everneed, iverneed);
6043 iverneed->vn_bfd = abfd;
6045 iverneed->vn_filename =
6046 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
6048 if (iverneed->vn_filename == NULL)
6051 amt = iverneed->vn_cnt;
6052 amt *= sizeof (Elf_Internal_Vernaux);
6053 iverneed->vn_auxptr = (Elf_Internal_Vernaux *) bfd_alloc (abfd, amt);
6055 evernaux = ((Elf_External_Vernaux *)
6056 ((bfd_byte *) everneed + iverneed->vn_aux));
6057 ivernaux = iverneed->vn_auxptr;
6058 for (j = 0; j < iverneed->vn_cnt; j++, ivernaux++)
6060 _bfd_elf_swap_vernaux_in (abfd, evernaux, ivernaux);
6062 ivernaux->vna_nodename =
6063 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
6064 ivernaux->vna_name);
6065 if (ivernaux->vna_nodename == NULL)
6068 if (j + 1 < iverneed->vn_cnt)
6069 ivernaux->vna_nextptr = ivernaux + 1;
6071 ivernaux->vna_nextptr = NULL;
6073 evernaux = ((Elf_External_Vernaux *)
6074 ((bfd_byte *) evernaux + ivernaux->vna_next));
6077 if (i + 1 < hdr->sh_info)
6078 iverneed->vn_nextref = iverneed + 1;
6080 iverneed->vn_nextref = NULL;
6082 everneed = ((Elf_External_Verneed *)
6083 ((bfd_byte *) everneed + iverneed->vn_next));
6093 if (contents != NULL)
6099 _bfd_elf_make_empty_symbol (abfd)
6102 elf_symbol_type *newsym;
6103 bfd_size_type amt = sizeof (elf_symbol_type);
6105 newsym = (elf_symbol_type *) bfd_zalloc (abfd, amt);
6110 newsym->symbol.the_bfd = abfd;
6111 return &newsym->symbol;
6116 _bfd_elf_get_symbol_info (ignore_abfd, symbol, ret)
6117 bfd *ignore_abfd ATTRIBUTE_UNUSED;
6121 bfd_symbol_info (symbol, ret);
6124 /* Return whether a symbol name implies a local symbol. Most targets
6125 use this function for the is_local_label_name entry point, but some
6129 _bfd_elf_is_local_label_name (abfd, name)
6130 bfd *abfd ATTRIBUTE_UNUSED;
6133 /* Normal local symbols start with ``.L''. */
6134 if (name[0] == '.' && name[1] == 'L')
6137 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
6138 DWARF debugging symbols starting with ``..''. */
6139 if (name[0] == '.' && name[1] == '.')
6142 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
6143 emitting DWARF debugging output. I suspect this is actually a
6144 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
6145 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
6146 underscore to be emitted on some ELF targets). For ease of use,
6147 we treat such symbols as local. */
6148 if (name[0] == '_' && name[1] == '.' && name[2] == 'L' && name[3] == '_')
6155 _bfd_elf_get_lineno (ignore_abfd, symbol)
6156 bfd *ignore_abfd ATTRIBUTE_UNUSED;
6157 asymbol *symbol ATTRIBUTE_UNUSED;
6164 _bfd_elf_set_arch_mach (abfd, arch, machine)
6166 enum bfd_architecture arch;
6167 unsigned long machine;
6169 /* If this isn't the right architecture for this backend, and this
6170 isn't the generic backend, fail. */
6171 if (arch != get_elf_backend_data (abfd)->arch
6172 && arch != bfd_arch_unknown
6173 && get_elf_backend_data (abfd)->arch != bfd_arch_unknown)
6176 return bfd_default_set_arch_mach (abfd, arch, machine);
6179 /* Find the function to a particular section and offset,
6180 for error reporting. */
6183 elf_find_function (abfd, section, symbols, offset,
6184 filename_ptr, functionname_ptr)
6185 bfd *abfd ATTRIBUTE_UNUSED;
6189 const char **filename_ptr;
6190 const char **functionname_ptr;
6192 const char *filename;
6201 for (p = symbols; *p != NULL; p++)
6205 q = (elf_symbol_type *) *p;
6207 if (bfd_get_section (&q->symbol) != section)
6210 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
6215 filename = bfd_asymbol_name (&q->symbol);
6219 if (q->symbol.section == section
6220 && q->symbol.value >= low_func
6221 && q->symbol.value <= offset)
6223 func = (asymbol *) q;
6224 low_func = q->symbol.value;
6234 *filename_ptr = filename;
6235 if (functionname_ptr)
6236 *functionname_ptr = bfd_asymbol_name (func);
6241 /* Find the nearest line to a particular section and offset,
6242 for error reporting. */
6245 _bfd_elf_find_nearest_line (abfd, section, symbols, offset,
6246 filename_ptr, functionname_ptr, line_ptr)
6251 const char **filename_ptr;
6252 const char **functionname_ptr;
6253 unsigned int *line_ptr;
6257 if (_bfd_dwarf1_find_nearest_line (abfd, section, symbols, offset,
6258 filename_ptr, functionname_ptr,
6261 if (!*functionname_ptr)
6262 elf_find_function (abfd, section, symbols, offset,
6263 *filename_ptr ? NULL : filename_ptr,
6269 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
6270 filename_ptr, functionname_ptr,
6272 &elf_tdata (abfd)->dwarf2_find_line_info))
6274 if (!*functionname_ptr)
6275 elf_find_function (abfd, section, symbols, offset,
6276 *filename_ptr ? NULL : filename_ptr,
6282 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
6283 &found, filename_ptr,
6284 functionname_ptr, line_ptr,
6285 &elf_tdata (abfd)->line_info))
6287 if (found && (*functionname_ptr || *line_ptr))
6290 if (symbols == NULL)
6293 if (! elf_find_function (abfd, section, symbols, offset,
6294 filename_ptr, functionname_ptr))
6302 _bfd_elf_sizeof_headers (abfd, reloc)
6308 ret = get_elf_backend_data (abfd)->s->sizeof_ehdr;
6310 ret += get_program_header_size (abfd);
6315 _bfd_elf_set_section_contents (abfd, section, location, offset, count)
6320 bfd_size_type count;
6322 Elf_Internal_Shdr *hdr;
6325 if (! abfd->output_has_begun
6326 && ! (_bfd_elf_compute_section_file_positions
6327 (abfd, (struct bfd_link_info *) NULL)))
6330 hdr = &elf_section_data (section)->this_hdr;
6331 pos = hdr->sh_offset + offset;
6332 if (bfd_seek (abfd, pos, SEEK_SET) != 0
6333 || bfd_bwrite (location, count, abfd) != count)
6340 _bfd_elf_no_info_to_howto (abfd, cache_ptr, dst)
6341 bfd *abfd ATTRIBUTE_UNUSED;
6342 arelent *cache_ptr ATTRIBUTE_UNUSED;
6343 Elf_Internal_Rela *dst ATTRIBUTE_UNUSED;
6348 /* Try to convert a non-ELF reloc into an ELF one. */
6351 _bfd_elf_validate_reloc (abfd, areloc)
6355 /* Check whether we really have an ELF howto. */
6357 if ((*areloc->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec)
6359 bfd_reloc_code_real_type code;
6360 reloc_howto_type *howto;
6362 /* Alien reloc: Try to determine its type to replace it with an
6363 equivalent ELF reloc. */
6365 if (areloc->howto->pc_relative)
6367 switch (areloc->howto->bitsize)
6370 code = BFD_RELOC_8_PCREL;
6373 code = BFD_RELOC_12_PCREL;
6376 code = BFD_RELOC_16_PCREL;
6379 code = BFD_RELOC_24_PCREL;
6382 code = BFD_RELOC_32_PCREL;
6385 code = BFD_RELOC_64_PCREL;
6391 howto = bfd_reloc_type_lookup (abfd, code);
6393 if (areloc->howto->pcrel_offset != howto->pcrel_offset)
6395 if (howto->pcrel_offset)
6396 areloc->addend += areloc->address;
6398 areloc->addend -= areloc->address; /* addend is unsigned!! */
6403 switch (areloc->howto->bitsize)
6409 code = BFD_RELOC_14;
6412 code = BFD_RELOC_16;
6415 code = BFD_RELOC_26;
6418 code = BFD_RELOC_32;
6421 code = BFD_RELOC_64;
6427 howto = bfd_reloc_type_lookup (abfd, code);
6431 areloc->howto = howto;
6439 (*_bfd_error_handler)
6440 (_("%s: unsupported relocation type %s"),
6441 bfd_archive_filename (abfd), areloc->howto->name);
6442 bfd_set_error (bfd_error_bad_value);
6447 _bfd_elf_close_and_cleanup (abfd)
6450 if (bfd_get_format (abfd) == bfd_object)
6452 if (elf_shstrtab (abfd) != NULL)
6453 _bfd_elf_strtab_free (elf_shstrtab (abfd));
6456 return _bfd_generic_close_and_cleanup (abfd);
6459 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
6460 in the relocation's offset. Thus we cannot allow any sort of sanity
6461 range-checking to interfere. There is nothing else to do in processing
6464 bfd_reloc_status_type
6465 _bfd_elf_rel_vtable_reloc_fn (abfd, re, symbol, data, is, obfd, errmsg)
6466 bfd *abfd ATTRIBUTE_UNUSED;
6467 arelent *re ATTRIBUTE_UNUSED;
6468 struct symbol_cache_entry *symbol ATTRIBUTE_UNUSED;
6469 PTR data ATTRIBUTE_UNUSED;
6470 asection *is ATTRIBUTE_UNUSED;
6471 bfd *obfd ATTRIBUTE_UNUSED;
6472 char **errmsg ATTRIBUTE_UNUSED;
6474 return bfd_reloc_ok;
6477 /* Elf core file support. Much of this only works on native
6478 toolchains, since we rely on knowing the
6479 machine-dependent procfs structure in order to pick
6480 out details about the corefile. */
6482 #ifdef HAVE_SYS_PROCFS_H
6483 # include <sys/procfs.h>
6486 /* FIXME: this is kinda wrong, but it's what gdb wants. */
6489 elfcore_make_pid (abfd)
6492 return ((elf_tdata (abfd)->core_lwpid << 16)
6493 + (elf_tdata (abfd)->core_pid));
6496 /* If there isn't a section called NAME, make one, using
6497 data from SECT. Note, this function will generate a
6498 reference to NAME, so you shouldn't deallocate or
6502 elfcore_maybe_make_sect (abfd, name, sect)
6509 if (bfd_get_section_by_name (abfd, name) != NULL)
6512 sect2 = bfd_make_section (abfd, name);
6516 sect2->_raw_size = sect->_raw_size;
6517 sect2->filepos = sect->filepos;
6518 sect2->flags = sect->flags;
6519 sect2->alignment_power = sect->alignment_power;
6523 /* Create a pseudosection containing SIZE bytes at FILEPOS. This
6524 actually creates up to two pseudosections:
6525 - For the single-threaded case, a section named NAME, unless
6526 such a section already exists.
6527 - For the multi-threaded case, a section named "NAME/PID", where
6528 PID is elfcore_make_pid (abfd).
6529 Both pseudosections have identical contents. */
6531 _bfd_elfcore_make_pseudosection (abfd, name, size, filepos)
6538 char *threaded_name;
6542 /* Build the section name. */
6544 sprintf (buf, "%s/%d", name, elfcore_make_pid (abfd));
6545 len = strlen (buf) + 1;
6546 threaded_name = bfd_alloc (abfd, (bfd_size_type) len);
6547 if (threaded_name == NULL)
6549 memcpy (threaded_name, buf, len);
6551 sect = bfd_make_section (abfd, threaded_name);
6554 sect->_raw_size = size;
6555 sect->filepos = filepos;
6556 sect->flags = SEC_HAS_CONTENTS;
6557 sect->alignment_power = 2;
6559 return elfcore_maybe_make_sect (abfd, name, sect);
6562 /* prstatus_t exists on:
6564 linux 2.[01] + glibc
6568 #if defined (HAVE_PRSTATUS_T)
6569 static bfd_boolean elfcore_grok_prstatus
6570 PARAMS ((bfd *, Elf_Internal_Note *));
6573 elfcore_grok_prstatus (abfd, note)
6575 Elf_Internal_Note *note;
6580 if (note->descsz == sizeof (prstatus_t))
6584 raw_size = sizeof (prstat.pr_reg);
6585 offset = offsetof (prstatus_t, pr_reg);
6586 memcpy (&prstat, note->descdata, sizeof (prstat));
6588 /* Do not overwrite the core signal if it
6589 has already been set by another thread. */
6590 if (elf_tdata (abfd)->core_signal == 0)
6591 elf_tdata (abfd)->core_signal = prstat.pr_cursig;
6592 elf_tdata (abfd)->core_pid = prstat.pr_pid;
6594 /* pr_who exists on:
6597 pr_who doesn't exist on:
6600 #if defined (HAVE_PRSTATUS_T_PR_WHO)
6601 elf_tdata (abfd)->core_lwpid = prstat.pr_who;
6604 #if defined (HAVE_PRSTATUS32_T)
6605 else if (note->descsz == sizeof (prstatus32_t))
6607 /* 64-bit host, 32-bit corefile */
6608 prstatus32_t prstat;
6610 raw_size = sizeof (prstat.pr_reg);
6611 offset = offsetof (prstatus32_t, pr_reg);
6612 memcpy (&prstat, note->descdata, sizeof (prstat));
6614 /* Do not overwrite the core signal if it
6615 has already been set by another thread. */
6616 if (elf_tdata (abfd)->core_signal == 0)
6617 elf_tdata (abfd)->core_signal = prstat.pr_cursig;
6618 elf_tdata (abfd)->core_pid = prstat.pr_pid;
6620 /* pr_who exists on:
6623 pr_who doesn't exist on:
6626 #if defined (HAVE_PRSTATUS32_T_PR_WHO)
6627 elf_tdata (abfd)->core_lwpid = prstat.pr_who;
6630 #endif /* HAVE_PRSTATUS32_T */
6633 /* Fail - we don't know how to handle any other
6634 note size (ie. data object type). */
6638 /* Make a ".reg/999" section and a ".reg" section. */
6639 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
6640 raw_size, note->descpos + offset);
6642 #endif /* defined (HAVE_PRSTATUS_T) */
6644 /* Create a pseudosection containing the exact contents of NOTE. */
6646 elfcore_make_note_pseudosection (abfd, name, note)
6649 Elf_Internal_Note *note;
6651 return _bfd_elfcore_make_pseudosection (abfd, name,
6652 note->descsz, note->descpos);
6655 /* There isn't a consistent prfpregset_t across platforms,
6656 but it doesn't matter, because we don't have to pick this
6657 data structure apart. */
6660 elfcore_grok_prfpreg (abfd, note)
6662 Elf_Internal_Note *note;
6664 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
6667 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
6668 type of 5 (NT_PRXFPREG). Just include the whole note's contents
6672 elfcore_grok_prxfpreg (abfd, note)
6674 Elf_Internal_Note *note;
6676 return elfcore_make_note_pseudosection (abfd, ".reg-xfp", note);
6679 #if defined (HAVE_PRPSINFO_T)
6680 typedef prpsinfo_t elfcore_psinfo_t;
6681 #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
6682 typedef prpsinfo32_t elfcore_psinfo32_t;
6686 #if defined (HAVE_PSINFO_T)
6687 typedef psinfo_t elfcore_psinfo_t;
6688 #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
6689 typedef psinfo32_t elfcore_psinfo32_t;
6693 /* return a malloc'ed copy of a string at START which is at
6694 most MAX bytes long, possibly without a terminating '\0'.
6695 the copy will always have a terminating '\0'. */
6698 _bfd_elfcore_strndup (abfd, start, max)
6704 char *end = memchr (start, '\0', max);
6712 dups = bfd_alloc (abfd, (bfd_size_type) len + 1);
6716 memcpy (dups, start, len);
6722 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
6723 static bfd_boolean elfcore_grok_psinfo
6724 PARAMS ((bfd *, Elf_Internal_Note *));
6727 elfcore_grok_psinfo (abfd, note)
6729 Elf_Internal_Note *note;
6731 if (note->descsz == sizeof (elfcore_psinfo_t))
6733 elfcore_psinfo_t psinfo;
6735 memcpy (&psinfo, note->descdata, sizeof (psinfo));
6737 elf_tdata (abfd)->core_program
6738 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
6739 sizeof (psinfo.pr_fname));
6741 elf_tdata (abfd)->core_command
6742 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
6743 sizeof (psinfo.pr_psargs));
6745 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
6746 else if (note->descsz == sizeof (elfcore_psinfo32_t))
6748 /* 64-bit host, 32-bit corefile */
6749 elfcore_psinfo32_t psinfo;
6751 memcpy (&psinfo, note->descdata, sizeof (psinfo));
6753 elf_tdata (abfd)->core_program
6754 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
6755 sizeof (psinfo.pr_fname));
6757 elf_tdata (abfd)->core_command
6758 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
6759 sizeof (psinfo.pr_psargs));
6765 /* Fail - we don't know how to handle any other
6766 note size (ie. data object type). */
6770 /* Note that for some reason, a spurious space is tacked
6771 onto the end of the args in some (at least one anyway)
6772 implementations, so strip it off if it exists. */
6775 char *command = elf_tdata (abfd)->core_command;
6776 int n = strlen (command);
6778 if (0 < n && command[n - 1] == ' ')
6779 command[n - 1] = '\0';
6784 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
6786 #if defined (HAVE_PSTATUS_T)
6787 static bfd_boolean elfcore_grok_pstatus
6788 PARAMS ((bfd *, Elf_Internal_Note *));
6791 elfcore_grok_pstatus (abfd, note)
6793 Elf_Internal_Note *note;
6795 if (note->descsz == sizeof (pstatus_t)
6796 #if defined (HAVE_PXSTATUS_T)
6797 || note->descsz == sizeof (pxstatus_t)
6803 memcpy (&pstat, note->descdata, sizeof (pstat));
6805 elf_tdata (abfd)->core_pid = pstat.pr_pid;
6807 #if defined (HAVE_PSTATUS32_T)
6808 else if (note->descsz == sizeof (pstatus32_t))
6810 /* 64-bit host, 32-bit corefile */
6813 memcpy (&pstat, note->descdata, sizeof (pstat));
6815 elf_tdata (abfd)->core_pid = pstat.pr_pid;
6818 /* Could grab some more details from the "representative"
6819 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
6820 NT_LWPSTATUS note, presumably. */
6824 #endif /* defined (HAVE_PSTATUS_T) */
6826 #if defined (HAVE_LWPSTATUS_T)
6827 static bfd_boolean elfcore_grok_lwpstatus
6828 PARAMS ((bfd *, Elf_Internal_Note *));
6831 elfcore_grok_lwpstatus (abfd, note)
6833 Elf_Internal_Note *note;
6835 lwpstatus_t lwpstat;
6841 if (note->descsz != sizeof (lwpstat)
6842 #if defined (HAVE_LWPXSTATUS_T)
6843 && note->descsz != sizeof (lwpxstatus_t)
6848 memcpy (&lwpstat, note->descdata, sizeof (lwpstat));
6850 elf_tdata (abfd)->core_lwpid = lwpstat.pr_lwpid;
6851 elf_tdata (abfd)->core_signal = lwpstat.pr_cursig;
6853 /* Make a ".reg/999" section. */
6855 sprintf (buf, ".reg/%d", elfcore_make_pid (abfd));
6856 len = strlen (buf) + 1;
6857 name = bfd_alloc (abfd, (bfd_size_type) len);
6860 memcpy (name, buf, len);
6862 sect = bfd_make_section (abfd, name);
6866 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
6867 sect->_raw_size = sizeof (lwpstat.pr_context.uc_mcontext.gregs);
6868 sect->filepos = note->descpos
6869 + offsetof (lwpstatus_t, pr_context.uc_mcontext.gregs);
6872 #if defined (HAVE_LWPSTATUS_T_PR_REG)
6873 sect->_raw_size = sizeof (lwpstat.pr_reg);
6874 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_reg);
6877 sect->flags = SEC_HAS_CONTENTS;
6878 sect->alignment_power = 2;
6880 if (!elfcore_maybe_make_sect (abfd, ".reg", sect))
6883 /* Make a ".reg2/999" section */
6885 sprintf (buf, ".reg2/%d", elfcore_make_pid (abfd));
6886 len = strlen (buf) + 1;
6887 name = bfd_alloc (abfd, (bfd_size_type) len);
6890 memcpy (name, buf, len);
6892 sect = bfd_make_section (abfd, name);
6896 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
6897 sect->_raw_size = sizeof (lwpstat.pr_context.uc_mcontext.fpregs);
6898 sect->filepos = note->descpos
6899 + offsetof (lwpstatus_t, pr_context.uc_mcontext.fpregs);
6902 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
6903 sect->_raw_size = sizeof (lwpstat.pr_fpreg);
6904 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_fpreg);
6907 sect->flags = SEC_HAS_CONTENTS;
6908 sect->alignment_power = 2;
6910 return elfcore_maybe_make_sect (abfd, ".reg2", sect);
6912 #endif /* defined (HAVE_LWPSTATUS_T) */
6914 #if defined (HAVE_WIN32_PSTATUS_T)
6916 elfcore_grok_win32pstatus (abfd, note)
6918 Elf_Internal_Note *note;
6924 win32_pstatus_t pstatus;
6926 if (note->descsz < sizeof (pstatus))
6929 memcpy (&pstatus, note->descdata, sizeof (pstatus));
6931 switch (pstatus.data_type)
6933 case NOTE_INFO_PROCESS:
6934 /* FIXME: need to add ->core_command. */
6935 elf_tdata (abfd)->core_signal = pstatus.data.process_info.signal;
6936 elf_tdata (abfd)->core_pid = pstatus.data.process_info.pid;
6939 case NOTE_INFO_THREAD:
6940 /* Make a ".reg/999" section. */
6941 sprintf (buf, ".reg/%d", pstatus.data.thread_info.tid);
6943 len = strlen (buf) + 1;
6944 name = bfd_alloc (abfd, (bfd_size_type) len);
6948 memcpy (name, buf, len);
6950 sect = bfd_make_section (abfd, name);
6954 sect->_raw_size = sizeof (pstatus.data.thread_info.thread_context);
6955 sect->filepos = (note->descpos
6956 + offsetof (struct win32_pstatus,
6957 data.thread_info.thread_context));
6958 sect->flags = SEC_HAS_CONTENTS;
6959 sect->alignment_power = 2;
6961 if (pstatus.data.thread_info.is_active_thread)
6962 if (! elfcore_maybe_make_sect (abfd, ".reg", sect))
6966 case NOTE_INFO_MODULE:
6967 /* Make a ".module/xxxxxxxx" section. */
6968 sprintf (buf, ".module/%08x", pstatus.data.module_info.base_address);
6970 len = strlen (buf) + 1;
6971 name = bfd_alloc (abfd, (bfd_size_type) len);
6975 memcpy (name, buf, len);
6977 sect = bfd_make_section (abfd, name);
6982 sect->_raw_size = note->descsz;
6983 sect->filepos = note->descpos;
6984 sect->flags = SEC_HAS_CONTENTS;
6985 sect->alignment_power = 2;
6994 #endif /* HAVE_WIN32_PSTATUS_T */
6997 elfcore_grok_note (abfd, note)
6999 Elf_Internal_Note *note;
7001 struct elf_backend_data *bed = get_elf_backend_data (abfd);
7009 if (bed->elf_backend_grok_prstatus)
7010 if ((*bed->elf_backend_grok_prstatus) (abfd, note))
7012 #if defined (HAVE_PRSTATUS_T)
7013 return elfcore_grok_prstatus (abfd, note);
7018 #if defined (HAVE_PSTATUS_T)
7020 return elfcore_grok_pstatus (abfd, note);
7023 #if defined (HAVE_LWPSTATUS_T)
7025 return elfcore_grok_lwpstatus (abfd, note);
7028 case NT_FPREGSET: /* FIXME: rename to NT_PRFPREG */
7029 return elfcore_grok_prfpreg (abfd, note);
7031 #if defined (HAVE_WIN32_PSTATUS_T)
7032 case NT_WIN32PSTATUS:
7033 return elfcore_grok_win32pstatus (abfd, note);
7036 case NT_PRXFPREG: /* Linux SSE extension */
7037 if (note->namesz == 6
7038 && strcmp (note->namedata, "LINUX") == 0)
7039 return elfcore_grok_prxfpreg (abfd, note);
7045 if (bed->elf_backend_grok_psinfo)
7046 if ((*bed->elf_backend_grok_psinfo) (abfd, note))
7048 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7049 return elfcore_grok_psinfo (abfd, note);
7056 asection *sect = bfd_make_section (abfd, ".auxv");
7060 sect->_raw_size = note->descsz;
7061 sect->filepos = note->descpos;
7062 sect->flags = SEC_HAS_CONTENTS;
7063 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32;
7071 elfcore_netbsd_get_lwpid (note, lwpidp)
7072 Elf_Internal_Note *note;
7077 cp = strchr (note->namedata, '@');
7080 *lwpidp = atoi(cp + 1);
7087 elfcore_grok_netbsd_procinfo (abfd, note)
7089 Elf_Internal_Note *note;
7092 /* Signal number at offset 0x08. */
7093 elf_tdata (abfd)->core_signal
7094 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x08);
7096 /* Process ID at offset 0x50. */
7097 elf_tdata (abfd)->core_pid
7098 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x50);
7100 /* Command name at 0x7c (max 32 bytes, including nul). */
7101 elf_tdata (abfd)->core_command
7102 = _bfd_elfcore_strndup (abfd, note->descdata + 0x7c, 31);
7108 elfcore_grok_netbsd_note (abfd, note)
7110 Elf_Internal_Note *note;
7114 if (elfcore_netbsd_get_lwpid (note, &lwp))
7115 elf_tdata (abfd)->core_lwpid = lwp;
7117 if (note->type == NT_NETBSDCORE_PROCINFO)
7119 /* NetBSD-specific core "procinfo". Note that we expect to
7120 find this note before any of the others, which is fine,
7121 since the kernel writes this note out first when it
7122 creates a core file. */
7124 return elfcore_grok_netbsd_procinfo (abfd, note);
7127 /* As of Jan 2002 there are no other machine-independent notes
7128 defined for NetBSD core files. If the note type is less
7129 than the start of the machine-dependent note types, we don't
7132 if (note->type < NT_NETBSDCORE_FIRSTMACH)
7136 switch (bfd_get_arch (abfd))
7138 /* On the Alpha, SPARC (32-bit and 64-bit), PT_GETREGS == mach+0 and
7139 PT_GETFPREGS == mach+2. */
7141 case bfd_arch_alpha:
7142 case bfd_arch_sparc:
7145 case NT_NETBSDCORE_FIRSTMACH+0:
7146 return elfcore_make_note_pseudosection (abfd, ".reg", note);
7148 case NT_NETBSDCORE_FIRSTMACH+2:
7149 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
7155 /* On all other arch's, PT_GETREGS == mach+1 and
7156 PT_GETFPREGS == mach+3. */
7161 case NT_NETBSDCORE_FIRSTMACH+1:
7162 return elfcore_make_note_pseudosection (abfd, ".reg", note);
7164 case NT_NETBSDCORE_FIRSTMACH+3:
7165 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
7175 elfcore_grok_nto_status (abfd, note, tid)
7177 Elf_Internal_Note *note;
7180 void *ddata = note->descdata;
7187 /* nto_procfs_status 'pid' field is at offset 0. */
7188 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, (bfd_byte *) ddata);
7190 /* nto_procfs_status 'tid' field is at offset 4. Pass it back. */
7191 *tid = bfd_get_32 (abfd, (bfd_byte *) ddata + 4);
7193 /* nto_procfs_status 'flags' field is at offset 8. */
7194 flags = bfd_get_32 (abfd, (bfd_byte *) ddata + 8);
7196 /* nto_procfs_status 'what' field is at offset 14. */
7197 if ((sig = bfd_get_16 (abfd, (bfd_byte *) ddata + 14)) > 0)
7199 elf_tdata (abfd)->core_signal = sig;
7200 elf_tdata (abfd)->core_lwpid = *tid;
7203 /* _DEBUG_FLAG_CURTID (current thread) is 0x80. Some cores
7204 do not come from signals so we make sure we set the current
7205 thread just in case. */
7206 if (flags & 0x00000080)
7207 elf_tdata (abfd)->core_lwpid = *tid;
7209 /* Make a ".qnx_core_status/%d" section. */
7210 sprintf (buf, ".qnx_core_status/%d", *tid);
7212 name = bfd_alloc (abfd, (bfd_size_type) strlen (buf) + 1);
7217 sect = bfd_make_section (abfd, name);
7221 sect->_raw_size = note->descsz;
7222 sect->filepos = note->descpos;
7223 sect->flags = SEC_HAS_CONTENTS;
7224 sect->alignment_power = 2;
7226 return (elfcore_maybe_make_sect (abfd, ".qnx_core_status", sect));
7230 elfcore_grok_nto_gregs (abfd, note, tid)
7232 Elf_Internal_Note *note;
7239 /* Make a ".reg/%d" section. */
7240 sprintf (buf, ".reg/%d", tid);
7242 name = bfd_alloc (abfd, (bfd_size_type) strlen (buf) + 1);
7247 sect = bfd_make_section (abfd, name);
7251 sect->_raw_size = note->descsz;
7252 sect->filepos = note->descpos;
7253 sect->flags = SEC_HAS_CONTENTS;
7254 sect->alignment_power = 2;
7256 /* This is the current thread. */
7257 if (elf_tdata (abfd)->core_lwpid == tid)
7258 return elfcore_maybe_make_sect (abfd, ".reg", sect);
7263 #define BFD_QNT_CORE_INFO 7
7264 #define BFD_QNT_CORE_STATUS 8
7265 #define BFD_QNT_CORE_GREG 9
7266 #define BFD_QNT_CORE_FPREG 10
7269 elfcore_grok_nto_note (abfd, note)
7271 Elf_Internal_Note *note;
7273 /* Every GREG section has a STATUS section before it. Store the
7274 tid from the previous call to pass down to the next gregs
7276 static pid_t tid = 1;
7280 case BFD_QNT_CORE_INFO: return elfcore_make_note_pseudosection (abfd, ".qnx_core_info", note);
7281 case BFD_QNT_CORE_STATUS: return elfcore_grok_nto_status (abfd, note, &tid);
7282 case BFD_QNT_CORE_GREG: return elfcore_grok_nto_gregs (abfd, note, tid);
7283 case BFD_QNT_CORE_FPREG: return elfcore_grok_prfpreg (abfd, note);
7284 default: return TRUE;
7288 /* Function: elfcore_write_note
7295 size of data for note
7298 End of buffer containing note. */
7301 elfcore_write_note (abfd, buf, bufsiz, name, type, input, size)
7310 Elf_External_Note *xnp;
7320 struct elf_backend_data *bed;
7322 namesz = strlen (name) + 1;
7323 bed = get_elf_backend_data (abfd);
7324 pad = -namesz & ((1 << bed->s->log_file_align) - 1);
7327 newspace = sizeof (Elf_External_Note) - 1 + namesz + pad + size;
7329 p = realloc (buf, *bufsiz + newspace);
7331 *bufsiz += newspace;
7332 xnp = (Elf_External_Note *) dest;
7333 H_PUT_32 (abfd, namesz, xnp->namesz);
7334 H_PUT_32 (abfd, size, xnp->descsz);
7335 H_PUT_32 (abfd, type, xnp->type);
7339 memcpy (dest, name, namesz);
7347 memcpy (dest, input, size);
7351 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7353 elfcore_write_prpsinfo (abfd, buf, bufsiz, fname, psargs)
7361 char *note_name = "CORE";
7363 #if defined (HAVE_PSINFO_T)
7365 note_type = NT_PSINFO;
7368 note_type = NT_PRPSINFO;
7371 memset (&data, 0, sizeof (data));
7372 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
7373 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
7374 return elfcore_write_note (abfd, buf, bufsiz,
7375 note_name, note_type, &data, sizeof (data));
7377 #endif /* PSINFO_T or PRPSINFO_T */
7379 #if defined (HAVE_PRSTATUS_T)
7381 elfcore_write_prstatus (abfd, buf, bufsiz, pid, cursig, gregs)
7390 char *note_name = "CORE";
7392 memset (&prstat, 0, sizeof (prstat));
7393 prstat.pr_pid = pid;
7394 prstat.pr_cursig = cursig;
7395 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
7396 return elfcore_write_note (abfd, buf, bufsiz,
7397 note_name, NT_PRSTATUS, &prstat, sizeof (prstat));
7399 #endif /* HAVE_PRSTATUS_T */
7401 #if defined (HAVE_LWPSTATUS_T)
7403 elfcore_write_lwpstatus (abfd, buf, bufsiz, pid, cursig, gregs)
7411 lwpstatus_t lwpstat;
7412 char *note_name = "CORE";
7414 memset (&lwpstat, 0, sizeof (lwpstat));
7415 lwpstat.pr_lwpid = pid >> 16;
7416 lwpstat.pr_cursig = cursig;
7417 #if defined (HAVE_LWPSTATUS_T_PR_REG)
7418 memcpy (lwpstat.pr_reg, gregs, sizeof (lwpstat.pr_reg));
7419 #elif defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7421 memcpy (lwpstat.pr_context.uc_mcontext.gregs,
7422 gregs, sizeof (lwpstat.pr_context.uc_mcontext.gregs));
7424 memcpy (lwpstat.pr_context.uc_mcontext.__gregs,
7425 gregs, sizeof (lwpstat.pr_context.uc_mcontext.__gregs));
7428 return elfcore_write_note (abfd, buf, bufsiz, note_name,
7429 NT_LWPSTATUS, &lwpstat, sizeof (lwpstat));
7431 #endif /* HAVE_LWPSTATUS_T */
7433 #if defined (HAVE_PSTATUS_T)
7435 elfcore_write_pstatus (abfd, buf, bufsiz, pid, cursig, gregs)
7444 char *note_name = "CORE";
7446 memset (&pstat, 0, sizeof (pstat));
7447 pstat.pr_pid = pid & 0xffff;
7448 buf = elfcore_write_note (abfd, buf, bufsiz, note_name,
7449 NT_PSTATUS, &pstat, sizeof (pstat));
7452 #endif /* HAVE_PSTATUS_T */
7455 elfcore_write_prfpreg (abfd, buf, bufsiz, fpregs, size)
7462 char *note_name = "CORE";
7463 return elfcore_write_note (abfd, buf, bufsiz,
7464 note_name, NT_FPREGSET, fpregs, size);
7468 elfcore_write_prxfpreg (abfd, buf, bufsiz, xfpregs, size)
7475 char *note_name = "LINUX";
7476 return elfcore_write_note (abfd, buf, bufsiz,
7477 note_name, NT_PRXFPREG, xfpregs, size);
7481 elfcore_read_notes (abfd, offset, size)
7492 if (bfd_seek (abfd, offset, SEEK_SET) != 0)
7495 buf = bfd_malloc (size);
7499 if (bfd_bread (buf, size, abfd) != size)
7507 while (p < buf + size)
7509 /* FIXME: bad alignment assumption. */
7510 Elf_External_Note *xnp = (Elf_External_Note *) p;
7511 Elf_Internal_Note in;
7513 in.type = H_GET_32 (abfd, xnp->type);
7515 in.namesz = H_GET_32 (abfd, xnp->namesz);
7516 in.namedata = xnp->name;
7518 in.descsz = H_GET_32 (abfd, xnp->descsz);
7519 in.descdata = in.namedata + BFD_ALIGN (in.namesz, 4);
7520 in.descpos = offset + (in.descdata - buf);
7522 if (strncmp (in.namedata, "NetBSD-CORE", 11) == 0)
7524 if (! elfcore_grok_netbsd_note (abfd, &in))
7527 else if (strncmp (in.namedata, "QNX", 3) == 0)
7529 if (! elfcore_grok_nto_note (abfd, &in))
7534 if (! elfcore_grok_note (abfd, &in))
7538 p = in.descdata + BFD_ALIGN (in.descsz, 4);
7545 /* Providing external access to the ELF program header table. */
7547 /* Return an upper bound on the number of bytes required to store a
7548 copy of ABFD's program header table entries. Return -1 if an error
7549 occurs; bfd_get_error will return an appropriate code. */
7552 bfd_get_elf_phdr_upper_bound (abfd)
7555 if (abfd->xvec->flavour != bfd_target_elf_flavour)
7557 bfd_set_error (bfd_error_wrong_format);
7561 return elf_elfheader (abfd)->e_phnum * sizeof (Elf_Internal_Phdr);
7564 /* Copy ABFD's program header table entries to *PHDRS. The entries
7565 will be stored as an array of Elf_Internal_Phdr structures, as
7566 defined in include/elf/internal.h. To find out how large the
7567 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
7569 Return the number of program header table entries read, or -1 if an
7570 error occurs; bfd_get_error will return an appropriate code. */
7573 bfd_get_elf_phdrs (abfd, phdrs)
7579 if (abfd->xvec->flavour != bfd_target_elf_flavour)
7581 bfd_set_error (bfd_error_wrong_format);
7585 num_phdrs = elf_elfheader (abfd)->e_phnum;
7586 memcpy (phdrs, elf_tdata (abfd)->phdr,
7587 num_phdrs * sizeof (Elf_Internal_Phdr));
7593 _bfd_elf_sprintf_vma (abfd, buf, value)
7594 bfd *abfd ATTRIBUTE_UNUSED;
7599 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
7601 i_ehdrp = elf_elfheader (abfd);
7602 if (i_ehdrp == NULL)
7603 sprintf_vma (buf, value);
7606 if (i_ehdrp->e_ident[EI_CLASS] == ELFCLASS64)
7608 #if BFD_HOST_64BIT_LONG
7609 sprintf (buf, "%016lx", value);
7611 sprintf (buf, "%08lx%08lx", _bfd_int64_high (value),
7612 _bfd_int64_low (value));
7616 sprintf (buf, "%08lx", (unsigned long) (value & 0xffffffff));
7619 sprintf_vma (buf, value);
7624 _bfd_elf_fprintf_vma (abfd, stream, value)
7625 bfd *abfd ATTRIBUTE_UNUSED;
7630 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
7632 i_ehdrp = elf_elfheader (abfd);
7633 if (i_ehdrp == NULL)
7634 fprintf_vma ((FILE *) stream, value);
7637 if (i_ehdrp->e_ident[EI_CLASS] == ELFCLASS64)
7639 #if BFD_HOST_64BIT_LONG
7640 fprintf ((FILE *) stream, "%016lx", value);
7642 fprintf ((FILE *) stream, "%08lx%08lx",
7643 _bfd_int64_high (value), _bfd_int64_low (value));
7647 fprintf ((FILE *) stream, "%08lx",
7648 (unsigned long) (value & 0xffffffff));
7651 fprintf_vma ((FILE *) stream, value);
7655 enum elf_reloc_type_class
7656 _bfd_elf_reloc_type_class (rela)
7657 const Elf_Internal_Rela *rela ATTRIBUTE_UNUSED;
7659 return reloc_class_normal;
7662 /* For RELA architectures, return the relocation value for a
7663 relocation against a local symbol. */
7666 _bfd_elf_rela_local_sym (abfd, sym, sec, rel)
7668 Elf_Internal_Sym *sym;
7670 Elf_Internal_Rela *rel;
7674 relocation = (sec->output_section->vma
7675 + sec->output_offset
7677 if ((sec->flags & SEC_MERGE)
7678 && ELF_ST_TYPE (sym->st_info) == STT_SECTION
7679 && sec->sec_info_type == ELF_INFO_TYPE_MERGE)
7685 _bfd_merged_section_offset (abfd, &msec,
7686 elf_section_data (sec)->sec_info,
7687 sym->st_value + rel->r_addend,
7690 rel->r_addend += msec->output_section->vma + msec->output_offset;
7696 _bfd_elf_rel_local_sym (abfd, sym, psec, addend)
7698 Elf_Internal_Sym *sym;
7702 asection *sec = *psec;
7704 if (sec->sec_info_type != ELF_INFO_TYPE_MERGE)
7705 return sym->st_value + addend;
7707 return _bfd_merged_section_offset (abfd, psec,
7708 elf_section_data (sec)->sec_info,
7709 sym->st_value + addend, (bfd_vma) 0);
7713 _bfd_elf_section_offset (abfd, info, sec, offset)
7715 struct bfd_link_info *info;
7719 struct bfd_elf_section_data *sec_data;
7721 sec_data = elf_section_data (sec);
7722 switch (sec->sec_info_type)
7724 case ELF_INFO_TYPE_STABS:
7725 return _bfd_stab_section_offset (abfd,
7726 &elf_hash_table (info)->merge_info,
7727 sec, &sec_data->sec_info, offset);
7728 case ELF_INFO_TYPE_EH_FRAME:
7729 return _bfd_elf_eh_frame_section_offset (abfd, sec, offset);
7735 /* Create a new BFD as if by bfd_openr. Rather than opening a file,
7736 reconstruct an ELF file by reading the segments out of remote memory
7737 based on the ELF file header at EHDR_VMA and the ELF program headers it
7738 points to. If not null, *LOADBASEP is filled in with the difference
7739 between the VMAs from which the segments were read, and the VMAs the
7740 file headers (and hence BFD's idea of each section's VMA) put them at.
7742 The function TARGET_READ_MEMORY is called to copy LEN bytes from the
7743 remote memory at target address VMA into the local buffer at MYADDR; it
7744 should return zero on success or an `errno' code on failure. TEMPL must
7745 be a BFD for an ELF target with the word size and byte order found in
7746 the remote memory. */
7749 bfd_elf_bfd_from_remote_memory (templ, ehdr_vma, loadbasep, target_read_memory)
7753 int (*target_read_memory) PARAMS ((bfd_vma vma, char *myaddr, int len));
7755 return (*get_elf_backend_data (templ)->elf_backend_bfd_from_remote_memory)
7756 (templ, ehdr_vma, loadbasep, target_read_memory);