1 /* ELF executable support for BFD.
3 Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
4 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
6 This file is part of BFD, the Binary File Descriptor library.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
26 BFD support for ELF formats is being worked on.
27 Currently, the best supported back ends are for sparc and i386
28 (running svr4 or Solaris 2).
30 Documentation of the internals of the support code still needs
31 to be written. The code is changing quickly enough that we
32 haven't bothered yet. */
34 /* For sparc64-cross-sparc32. */
42 #include "libiberty.h"
44 static int elf_sort_sections (const void *, const void *);
45 static bfd_boolean assign_file_positions_except_relocs (bfd *, struct bfd_link_info *);
46 static bfd_boolean prep_headers (bfd *);
47 static bfd_boolean swap_out_syms (bfd *, struct bfd_strtab_hash **, int) ;
48 static bfd_boolean elfcore_read_notes (bfd *, file_ptr, bfd_size_type) ;
50 /* Swap version information in and out. The version information is
51 currently size independent. If that ever changes, this code will
52 need to move into elfcode.h. */
54 /* Swap in a Verdef structure. */
57 _bfd_elf_swap_verdef_in (bfd *abfd,
58 const Elf_External_Verdef *src,
59 Elf_Internal_Verdef *dst)
61 dst->vd_version = H_GET_16 (abfd, src->vd_version);
62 dst->vd_flags = H_GET_16 (abfd, src->vd_flags);
63 dst->vd_ndx = H_GET_16 (abfd, src->vd_ndx);
64 dst->vd_cnt = H_GET_16 (abfd, src->vd_cnt);
65 dst->vd_hash = H_GET_32 (abfd, src->vd_hash);
66 dst->vd_aux = H_GET_32 (abfd, src->vd_aux);
67 dst->vd_next = H_GET_32 (abfd, src->vd_next);
70 /* Swap out a Verdef structure. */
73 _bfd_elf_swap_verdef_out (bfd *abfd,
74 const Elf_Internal_Verdef *src,
75 Elf_External_Verdef *dst)
77 H_PUT_16 (abfd, src->vd_version, dst->vd_version);
78 H_PUT_16 (abfd, src->vd_flags, dst->vd_flags);
79 H_PUT_16 (abfd, src->vd_ndx, dst->vd_ndx);
80 H_PUT_16 (abfd, src->vd_cnt, dst->vd_cnt);
81 H_PUT_32 (abfd, src->vd_hash, dst->vd_hash);
82 H_PUT_32 (abfd, src->vd_aux, dst->vd_aux);
83 H_PUT_32 (abfd, src->vd_next, dst->vd_next);
86 /* Swap in a Verdaux structure. */
89 _bfd_elf_swap_verdaux_in (bfd *abfd,
90 const Elf_External_Verdaux *src,
91 Elf_Internal_Verdaux *dst)
93 dst->vda_name = H_GET_32 (abfd, src->vda_name);
94 dst->vda_next = H_GET_32 (abfd, src->vda_next);
97 /* Swap out a Verdaux structure. */
100 _bfd_elf_swap_verdaux_out (bfd *abfd,
101 const Elf_Internal_Verdaux *src,
102 Elf_External_Verdaux *dst)
104 H_PUT_32 (abfd, src->vda_name, dst->vda_name);
105 H_PUT_32 (abfd, src->vda_next, dst->vda_next);
108 /* Swap in a Verneed structure. */
111 _bfd_elf_swap_verneed_in (bfd *abfd,
112 const Elf_External_Verneed *src,
113 Elf_Internal_Verneed *dst)
115 dst->vn_version = H_GET_16 (abfd, src->vn_version);
116 dst->vn_cnt = H_GET_16 (abfd, src->vn_cnt);
117 dst->vn_file = H_GET_32 (abfd, src->vn_file);
118 dst->vn_aux = H_GET_32 (abfd, src->vn_aux);
119 dst->vn_next = H_GET_32 (abfd, src->vn_next);
122 /* Swap out a Verneed structure. */
125 _bfd_elf_swap_verneed_out (bfd *abfd,
126 const Elf_Internal_Verneed *src,
127 Elf_External_Verneed *dst)
129 H_PUT_16 (abfd, src->vn_version, dst->vn_version);
130 H_PUT_16 (abfd, src->vn_cnt, dst->vn_cnt);
131 H_PUT_32 (abfd, src->vn_file, dst->vn_file);
132 H_PUT_32 (abfd, src->vn_aux, dst->vn_aux);
133 H_PUT_32 (abfd, src->vn_next, dst->vn_next);
136 /* Swap in a Vernaux structure. */
139 _bfd_elf_swap_vernaux_in (bfd *abfd,
140 const Elf_External_Vernaux *src,
141 Elf_Internal_Vernaux *dst)
143 dst->vna_hash = H_GET_32 (abfd, src->vna_hash);
144 dst->vna_flags = H_GET_16 (abfd, src->vna_flags);
145 dst->vna_other = H_GET_16 (abfd, src->vna_other);
146 dst->vna_name = H_GET_32 (abfd, src->vna_name);
147 dst->vna_next = H_GET_32 (abfd, src->vna_next);
150 /* Swap out a Vernaux structure. */
153 _bfd_elf_swap_vernaux_out (bfd *abfd,
154 const Elf_Internal_Vernaux *src,
155 Elf_External_Vernaux *dst)
157 H_PUT_32 (abfd, src->vna_hash, dst->vna_hash);
158 H_PUT_16 (abfd, src->vna_flags, dst->vna_flags);
159 H_PUT_16 (abfd, src->vna_other, dst->vna_other);
160 H_PUT_32 (abfd, src->vna_name, dst->vna_name);
161 H_PUT_32 (abfd, src->vna_next, dst->vna_next);
164 /* Swap in a Versym structure. */
167 _bfd_elf_swap_versym_in (bfd *abfd,
168 const Elf_External_Versym *src,
169 Elf_Internal_Versym *dst)
171 dst->vs_vers = H_GET_16 (abfd, src->vs_vers);
174 /* Swap out a Versym structure. */
177 _bfd_elf_swap_versym_out (bfd *abfd,
178 const Elf_Internal_Versym *src,
179 Elf_External_Versym *dst)
181 H_PUT_16 (abfd, src->vs_vers, dst->vs_vers);
184 /* Standard ELF hash function. Do not change this function; you will
185 cause invalid hash tables to be generated. */
188 bfd_elf_hash (const char *namearg)
190 const unsigned char *name = (const unsigned char *) namearg;
195 while ((ch = *name++) != '\0')
198 if ((g = (h & 0xf0000000)) != 0)
201 /* The ELF ABI says `h &= ~g', but this is equivalent in
202 this case and on some machines one insn instead of two. */
206 return h & 0xffffffff;
210 bfd_elf_mkobject (bfd *abfd)
212 /* This just does initialization. */
213 /* coff_mkobject zalloc's space for tdata.coff_obj_data ... */
214 elf_tdata (abfd) = bfd_zalloc (abfd, sizeof (struct elf_obj_tdata));
215 if (elf_tdata (abfd) == 0)
217 /* Since everything is done at close time, do we need any
224 bfd_elf_mkcorefile (bfd *abfd)
226 /* I think this can be done just like an object file. */
227 return bfd_elf_mkobject (abfd);
231 bfd_elf_get_str_section (bfd *abfd, unsigned int shindex)
233 Elf_Internal_Shdr **i_shdrp;
234 bfd_byte *shstrtab = NULL;
236 bfd_size_type shstrtabsize;
238 i_shdrp = elf_elfsections (abfd);
239 if (i_shdrp == 0 || i_shdrp[shindex] == 0)
242 shstrtab = i_shdrp[shindex]->contents;
243 if (shstrtab == NULL)
245 /* No cached one, attempt to read, and cache what we read. */
246 offset = i_shdrp[shindex]->sh_offset;
247 shstrtabsize = i_shdrp[shindex]->sh_size;
249 /* Allocate and clear an extra byte at the end, to prevent crashes
250 in case the string table is not terminated. */
251 if (shstrtabsize + 1 == 0
252 || (shstrtab = bfd_alloc (abfd, shstrtabsize + 1)) == NULL
253 || bfd_seek (abfd, offset, SEEK_SET) != 0)
255 else if (bfd_bread (shstrtab, shstrtabsize, abfd) != shstrtabsize)
257 if (bfd_get_error () != bfd_error_system_call)
258 bfd_set_error (bfd_error_file_truncated);
262 shstrtab[shstrtabsize] = '\0';
263 i_shdrp[shindex]->contents = shstrtab;
265 return (char *) shstrtab;
269 bfd_elf_string_from_elf_section (bfd *abfd,
270 unsigned int shindex,
271 unsigned int strindex)
273 Elf_Internal_Shdr *hdr;
278 hdr = elf_elfsections (abfd)[shindex];
280 if (hdr->contents == NULL
281 && bfd_elf_get_str_section (abfd, shindex) == NULL)
284 if (strindex >= hdr->sh_size)
286 unsigned int shstrndx = elf_elfheader(abfd)->e_shstrndx;
287 (*_bfd_error_handler)
288 (_("%B: invalid string offset %u >= %lu for section `%s'"),
289 abfd, strindex, (unsigned long) hdr->sh_size,
290 (shindex == shstrndx && strindex == hdr->sh_name
292 : bfd_elf_string_from_elf_section (abfd, shstrndx, hdr->sh_name)));
296 return ((char *) hdr->contents) + strindex;
299 /* Read and convert symbols to internal format.
300 SYMCOUNT specifies the number of symbols to read, starting from
301 symbol SYMOFFSET. If any of INTSYM_BUF, EXTSYM_BUF or EXTSHNDX_BUF
302 are non-NULL, they are used to store the internal symbols, external
303 symbols, and symbol section index extensions, respectively. */
306 bfd_elf_get_elf_syms (bfd *ibfd,
307 Elf_Internal_Shdr *symtab_hdr,
310 Elf_Internal_Sym *intsym_buf,
312 Elf_External_Sym_Shndx *extshndx_buf)
314 Elf_Internal_Shdr *shndx_hdr;
316 const bfd_byte *esym;
317 Elf_External_Sym_Shndx *alloc_extshndx;
318 Elf_External_Sym_Shndx *shndx;
319 Elf_Internal_Sym *isym;
320 Elf_Internal_Sym *isymend;
321 const struct elf_backend_data *bed;
329 /* Normal syms might have section extension entries. */
331 if (symtab_hdr == &elf_tdata (ibfd)->symtab_hdr)
332 shndx_hdr = &elf_tdata (ibfd)->symtab_shndx_hdr;
334 /* Read the symbols. */
336 alloc_extshndx = NULL;
337 bed = get_elf_backend_data (ibfd);
338 extsym_size = bed->s->sizeof_sym;
339 amt = symcount * extsym_size;
340 pos = symtab_hdr->sh_offset + symoffset * extsym_size;
341 if (extsym_buf == NULL)
343 alloc_ext = bfd_malloc2 (symcount, extsym_size);
344 extsym_buf = alloc_ext;
346 if (extsym_buf == NULL
347 || bfd_seek (ibfd, pos, SEEK_SET) != 0
348 || bfd_bread (extsym_buf, amt, ibfd) != amt)
354 if (shndx_hdr == NULL || shndx_hdr->sh_size == 0)
358 amt = symcount * sizeof (Elf_External_Sym_Shndx);
359 pos = shndx_hdr->sh_offset + symoffset * sizeof (Elf_External_Sym_Shndx);
360 if (extshndx_buf == NULL)
362 alloc_extshndx = bfd_malloc2 (symcount,
363 sizeof (Elf_External_Sym_Shndx));
364 extshndx_buf = alloc_extshndx;
366 if (extshndx_buf == NULL
367 || bfd_seek (ibfd, pos, SEEK_SET) != 0
368 || bfd_bread (extshndx_buf, amt, ibfd) != amt)
375 if (intsym_buf == NULL)
377 intsym_buf = bfd_malloc2 (symcount, sizeof (Elf_Internal_Sym));
378 if (intsym_buf == NULL)
382 /* Convert the symbols to internal form. */
383 isymend = intsym_buf + symcount;
384 for (esym = extsym_buf, isym = intsym_buf, shndx = extshndx_buf;
386 esym += extsym_size, isym++, shndx = shndx != NULL ? shndx + 1 : NULL)
387 (*bed->s->swap_symbol_in) (ibfd, esym, shndx, isym);
390 if (alloc_ext != NULL)
392 if (alloc_extshndx != NULL)
393 free (alloc_extshndx);
398 /* Look up a symbol name. */
400 bfd_elf_sym_name (bfd *abfd,
401 Elf_Internal_Shdr *symtab_hdr,
402 Elf_Internal_Sym *isym,
406 unsigned int iname = isym->st_name;
407 unsigned int shindex = symtab_hdr->sh_link;
409 if (iname == 0 && ELF_ST_TYPE (isym->st_info) == STT_SECTION
410 /* Check for a bogus st_shndx to avoid crashing. */
411 && isym->st_shndx < elf_numsections (abfd)
412 && !(isym->st_shndx >= SHN_LORESERVE && isym->st_shndx <= SHN_HIRESERVE))
414 iname = elf_elfsections (abfd)[isym->st_shndx]->sh_name;
415 shindex = elf_elfheader (abfd)->e_shstrndx;
418 name = bfd_elf_string_from_elf_section (abfd, shindex, iname);
421 else if (sym_sec && *name == '\0')
422 name = bfd_section_name (abfd, sym_sec);
427 /* Elf_Internal_Shdr->contents is an array of these for SHT_GROUP
428 sections. The first element is the flags, the rest are section
431 typedef union elf_internal_group {
432 Elf_Internal_Shdr *shdr;
434 } Elf_Internal_Group;
436 /* Return the name of the group signature symbol. Why isn't the
437 signature just a string? */
440 group_signature (bfd *abfd, Elf_Internal_Shdr *ghdr)
442 Elf_Internal_Shdr *hdr;
443 unsigned char esym[sizeof (Elf64_External_Sym)];
444 Elf_External_Sym_Shndx eshndx;
445 Elf_Internal_Sym isym;
447 /* First we need to ensure the symbol table is available. Make sure
448 that it is a symbol table section. */
449 hdr = elf_elfsections (abfd) [ghdr->sh_link];
450 if (hdr->sh_type != SHT_SYMTAB
451 || ! bfd_section_from_shdr (abfd, ghdr->sh_link))
454 /* Go read the symbol. */
455 hdr = &elf_tdata (abfd)->symtab_hdr;
456 if (bfd_elf_get_elf_syms (abfd, hdr, 1, ghdr->sh_info,
457 &isym, esym, &eshndx) == NULL)
460 return bfd_elf_sym_name (abfd, hdr, &isym, NULL);
463 /* Set next_in_group list pointer, and group name for NEWSECT. */
466 setup_group (bfd *abfd, Elf_Internal_Shdr *hdr, asection *newsect)
468 unsigned int num_group = elf_tdata (abfd)->num_group;
470 /* If num_group is zero, read in all SHT_GROUP sections. The count
471 is set to -1 if there are no SHT_GROUP sections. */
474 unsigned int i, shnum;
476 /* First count the number of groups. If we have a SHT_GROUP
477 section with just a flag word (ie. sh_size is 4), ignore it. */
478 shnum = elf_numsections (abfd);
480 for (i = 0; i < shnum; i++)
482 Elf_Internal_Shdr *shdr = elf_elfsections (abfd)[i];
483 if (shdr->sh_type == SHT_GROUP && shdr->sh_size >= 8)
489 num_group = (unsigned) -1;
490 elf_tdata (abfd)->num_group = num_group;
494 /* We keep a list of elf section headers for group sections,
495 so we can find them quickly. */
498 elf_tdata (abfd)->num_group = num_group;
499 elf_tdata (abfd)->group_sect_ptr
500 = bfd_alloc2 (abfd, num_group, sizeof (Elf_Internal_Shdr *));
501 if (elf_tdata (abfd)->group_sect_ptr == NULL)
505 for (i = 0; i < shnum; i++)
507 Elf_Internal_Shdr *shdr = elf_elfsections (abfd)[i];
508 if (shdr->sh_type == SHT_GROUP && shdr->sh_size >= 8)
511 Elf_Internal_Group *dest;
513 /* Add to list of sections. */
514 elf_tdata (abfd)->group_sect_ptr[num_group] = shdr;
517 /* Read the raw contents. */
518 BFD_ASSERT (sizeof (*dest) >= 4);
519 amt = shdr->sh_size * sizeof (*dest) / 4;
520 shdr->contents = bfd_alloc2 (abfd, shdr->sh_size,
522 if (shdr->contents == NULL
523 || bfd_seek (abfd, shdr->sh_offset, SEEK_SET) != 0
524 || (bfd_bread (shdr->contents, shdr->sh_size, abfd)
528 /* Translate raw contents, a flag word followed by an
529 array of elf section indices all in target byte order,
530 to the flag word followed by an array of elf section
532 src = shdr->contents + shdr->sh_size;
533 dest = (Elf_Internal_Group *) (shdr->contents + amt);
540 idx = H_GET_32 (abfd, src);
541 if (src == shdr->contents)
544 if (shdr->bfd_section != NULL && (idx & GRP_COMDAT))
545 shdr->bfd_section->flags
546 |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
551 ((*_bfd_error_handler)
552 (_("%B: invalid SHT_GROUP entry"), abfd));
555 dest->shdr = elf_elfsections (abfd)[idx];
562 if (num_group != (unsigned) -1)
566 for (i = 0; i < num_group; i++)
568 Elf_Internal_Shdr *shdr = elf_tdata (abfd)->group_sect_ptr[i];
569 Elf_Internal_Group *idx = (Elf_Internal_Group *) shdr->contents;
570 unsigned int n_elt = shdr->sh_size / 4;
572 /* Look through this group's sections to see if current
573 section is a member. */
575 if ((++idx)->shdr == hdr)
579 /* We are a member of this group. Go looking through
580 other members to see if any others are linked via
582 idx = (Elf_Internal_Group *) shdr->contents;
583 n_elt = shdr->sh_size / 4;
585 if ((s = (++idx)->shdr->bfd_section) != NULL
586 && elf_next_in_group (s) != NULL)
590 /* Snarf the group name from other member, and
591 insert current section in circular list. */
592 elf_group_name (newsect) = elf_group_name (s);
593 elf_next_in_group (newsect) = elf_next_in_group (s);
594 elf_next_in_group (s) = newsect;
600 gname = group_signature (abfd, shdr);
603 elf_group_name (newsect) = gname;
605 /* Start a circular list with one element. */
606 elf_next_in_group (newsect) = newsect;
609 /* If the group section has been created, point to the
611 if (shdr->bfd_section != NULL)
612 elf_next_in_group (shdr->bfd_section) = newsect;
620 if (elf_group_name (newsect) == NULL)
622 (*_bfd_error_handler) (_("%B: no group info for section %A"),
629 _bfd_elf_setup_sections (bfd *abfd)
632 unsigned int num_group = elf_tdata (abfd)->num_group;
633 bfd_boolean result = TRUE;
636 /* Process SHF_LINK_ORDER. */
637 for (s = abfd->sections; s != NULL; s = s->next)
639 Elf_Internal_Shdr *this_hdr = &elf_section_data (s)->this_hdr;
640 if ((this_hdr->sh_flags & SHF_LINK_ORDER) != 0)
642 unsigned int elfsec = this_hdr->sh_link;
643 /* FIXME: The old Intel compiler and old strip/objcopy may
644 not set the sh_link or sh_info fields. Hence we could
645 get the situation where elfsec is 0. */
648 const struct elf_backend_data *bed
649 = get_elf_backend_data (abfd);
650 if (bed->link_order_error_handler)
651 bed->link_order_error_handler
652 (_("%B: warning: sh_link not set for section `%A'"),
659 this_hdr = elf_elfsections (abfd)[elfsec];
662 Some strip/objcopy may leave an incorrect value in
663 sh_link. We don't want to proceed. */
664 link = this_hdr->bfd_section;
667 (*_bfd_error_handler)
668 (_("%B: sh_link [%d] in section `%A' is incorrect"),
669 s->owner, s, elfsec);
673 elf_linked_to_section (s) = link;
678 /* Process section groups. */
679 if (num_group == (unsigned) -1)
682 for (i = 0; i < num_group; i++)
684 Elf_Internal_Shdr *shdr = elf_tdata (abfd)->group_sect_ptr[i];
685 Elf_Internal_Group *idx = (Elf_Internal_Group *) shdr->contents;
686 unsigned int n_elt = shdr->sh_size / 4;
689 if ((++idx)->shdr->bfd_section)
690 elf_sec_group (idx->shdr->bfd_section) = shdr->bfd_section;
691 else if (idx->shdr->sh_type == SHT_RELA
692 || idx->shdr->sh_type == SHT_REL)
693 /* We won't include relocation sections in section groups in
694 output object files. We adjust the group section size here
695 so that relocatable link will work correctly when
696 relocation sections are in section group in input object
698 shdr->bfd_section->size -= 4;
701 /* There are some unknown sections in the group. */
702 (*_bfd_error_handler)
703 (_("%B: unknown [%d] section `%s' in group [%s]"),
705 (unsigned int) idx->shdr->sh_type,
706 bfd_elf_string_from_elf_section (abfd,
707 (elf_elfheader (abfd)
710 shdr->bfd_section->name);
718 bfd_elf_is_group_section (bfd *abfd ATTRIBUTE_UNUSED, const asection *sec)
720 return elf_next_in_group (sec) != NULL;
723 /* Make a BFD section from an ELF section. We store a pointer to the
724 BFD section in the bfd_section field of the header. */
727 _bfd_elf_make_section_from_shdr (bfd *abfd,
728 Elf_Internal_Shdr *hdr,
734 const struct elf_backend_data *bed;
736 if (hdr->bfd_section != NULL)
738 BFD_ASSERT (strcmp (name,
739 bfd_get_section_name (abfd, hdr->bfd_section)) == 0);
743 newsect = bfd_make_section_anyway (abfd, name);
747 hdr->bfd_section = newsect;
748 elf_section_data (newsect)->this_hdr = *hdr;
749 elf_section_data (newsect)->this_idx = shindex;
751 /* Always use the real type/flags. */
752 elf_section_type (newsect) = hdr->sh_type;
753 elf_section_flags (newsect) = hdr->sh_flags;
755 newsect->filepos = hdr->sh_offset;
757 if (! bfd_set_section_vma (abfd, newsect, hdr->sh_addr)
758 || ! bfd_set_section_size (abfd, newsect, hdr->sh_size)
759 || ! bfd_set_section_alignment (abfd, newsect,
760 bfd_log2 ((bfd_vma) hdr->sh_addralign)))
763 flags = SEC_NO_FLAGS;
764 if (hdr->sh_type != SHT_NOBITS)
765 flags |= SEC_HAS_CONTENTS;
766 if (hdr->sh_type == SHT_GROUP)
767 flags |= SEC_GROUP | SEC_EXCLUDE;
768 if ((hdr->sh_flags & SHF_ALLOC) != 0)
771 if (hdr->sh_type != SHT_NOBITS)
774 if ((hdr->sh_flags & SHF_WRITE) == 0)
775 flags |= SEC_READONLY;
776 if ((hdr->sh_flags & SHF_EXECINSTR) != 0)
778 else if ((flags & SEC_LOAD) != 0)
780 if ((hdr->sh_flags & SHF_MERGE) != 0)
783 newsect->entsize = hdr->sh_entsize;
784 if ((hdr->sh_flags & SHF_STRINGS) != 0)
785 flags |= SEC_STRINGS;
787 if (hdr->sh_flags & SHF_GROUP)
788 if (!setup_group (abfd, hdr, newsect))
790 if ((hdr->sh_flags & SHF_TLS) != 0)
791 flags |= SEC_THREAD_LOCAL;
793 if ((flags & SEC_ALLOC) == 0)
795 /* The debugging sections appear to be recognized only by name,
796 not any sort of flag. Their SEC_ALLOC bits are cleared. */
801 } debug_sections [] =
803 { "debug", 5 }, /* 'd' */
804 { NULL, 0 }, /* 'e' */
805 { NULL, 0 }, /* 'f' */
806 { "gnu.linkonce.wi.", 17 }, /* 'g' */
807 { NULL, 0 }, /* 'h' */
808 { NULL, 0 }, /* 'i' */
809 { NULL, 0 }, /* 'j' */
810 { NULL, 0 }, /* 'k' */
811 { "line", 4 }, /* 'l' */
812 { NULL, 0 }, /* 'm' */
813 { NULL, 0 }, /* 'n' */
814 { NULL, 0 }, /* 'o' */
815 { NULL, 0 }, /* 'p' */
816 { NULL, 0 }, /* 'q' */
817 { NULL, 0 }, /* 'r' */
818 { "stab", 4 } /* 's' */
823 int i = name [1] - 'd';
825 && i < (int) ARRAY_SIZE (debug_sections)
826 && debug_sections [i].name != NULL
827 && strncmp (&name [1], debug_sections [i].name,
828 debug_sections [i].len) == 0)
829 flags |= SEC_DEBUGGING;
833 /* As a GNU extension, if the name begins with .gnu.linkonce, we
834 only link a single copy of the section. This is used to support
835 g++. g++ will emit each template expansion in its own section.
836 The symbols will be defined as weak, so that multiple definitions
837 are permitted. The GNU linker extension is to actually discard
838 all but one of the sections. */
839 if (strncmp (name, ".gnu.linkonce", sizeof ".gnu.linkonce" - 1) == 0
840 && elf_next_in_group (newsect) == NULL)
841 flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
843 bed = get_elf_backend_data (abfd);
844 if (bed->elf_backend_section_flags)
845 if (! bed->elf_backend_section_flags (&flags, hdr))
848 if (! bfd_set_section_flags (abfd, newsect, flags))
851 if ((flags & SEC_ALLOC) != 0)
853 Elf_Internal_Phdr *phdr;
856 /* Look through the phdrs to see if we need to adjust the lma.
857 If all the p_paddr fields are zero, we ignore them, since
858 some ELF linkers produce such output. */
859 phdr = elf_tdata (abfd)->phdr;
860 for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
862 if (phdr->p_paddr != 0)
865 if (i < elf_elfheader (abfd)->e_phnum)
867 phdr = elf_tdata (abfd)->phdr;
868 for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
870 /* This section is part of this segment if its file
871 offset plus size lies within the segment's memory
872 span and, if the section is loaded, the extent of the
873 loaded data lies within the extent of the segment.
875 Note - we used to check the p_paddr field as well, and
876 refuse to set the LMA if it was 0. This is wrong
877 though, as a perfectly valid initialised segment can
878 have a p_paddr of zero. Some architectures, eg ARM,
879 place special significance on the address 0 and
880 executables need to be able to have a segment which
881 covers this address. */
882 if (phdr->p_type == PT_LOAD
883 && (bfd_vma) hdr->sh_offset >= phdr->p_offset
884 && (hdr->sh_offset + hdr->sh_size
885 <= phdr->p_offset + phdr->p_memsz)
886 && ((flags & SEC_LOAD) == 0
887 || (hdr->sh_offset + hdr->sh_size
888 <= phdr->p_offset + phdr->p_filesz)))
890 if ((flags & SEC_LOAD) == 0)
891 newsect->lma = (phdr->p_paddr
892 + hdr->sh_addr - phdr->p_vaddr);
894 /* We used to use the same adjustment for SEC_LOAD
895 sections, but that doesn't work if the segment
896 is packed with code from multiple VMAs.
897 Instead we calculate the section LMA based on
898 the segment LMA. It is assumed that the
899 segment will contain sections with contiguous
900 LMAs, even if the VMAs are not. */
901 newsect->lma = (phdr->p_paddr
902 + hdr->sh_offset - phdr->p_offset);
904 /* With contiguous segments, we can't tell from file
905 offsets whether a section with zero size should
906 be placed at the end of one segment or the
907 beginning of the next. Decide based on vaddr. */
908 if (hdr->sh_addr >= phdr->p_vaddr
909 && (hdr->sh_addr + hdr->sh_size
910 <= phdr->p_vaddr + phdr->p_memsz))
925 struct elf_internal_shdr *bfd_elf_find_section (bfd *abfd, char *name);
928 Helper functions for GDB to locate the string tables.
929 Since BFD hides string tables from callers, GDB needs to use an
930 internal hook to find them. Sun's .stabstr, in particular,
931 isn't even pointed to by the .stab section, so ordinary
932 mechanisms wouldn't work to find it, even if we had some.
935 struct elf_internal_shdr *
936 bfd_elf_find_section (bfd *abfd, char *name)
938 Elf_Internal_Shdr **i_shdrp;
943 i_shdrp = elf_elfsections (abfd);
946 shstrtab = bfd_elf_get_str_section (abfd,
947 elf_elfheader (abfd)->e_shstrndx);
948 if (shstrtab != NULL)
950 max = elf_numsections (abfd);
951 for (i = 1; i < max; i++)
952 if (!strcmp (&shstrtab[i_shdrp[i]->sh_name], name))
959 const char *const bfd_elf_section_type_names[] = {
960 "SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB",
961 "SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE",
962 "SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM",
965 /* ELF relocs are against symbols. If we are producing relocatable
966 output, and the reloc is against an external symbol, and nothing
967 has given us any additional addend, the resulting reloc will also
968 be against the same symbol. In such a case, we don't want to
969 change anything about the way the reloc is handled, since it will
970 all be done at final link time. Rather than put special case code
971 into bfd_perform_relocation, all the reloc types use this howto
972 function. It just short circuits the reloc if producing
973 relocatable output against an external symbol. */
975 bfd_reloc_status_type
976 bfd_elf_generic_reloc (bfd *abfd ATTRIBUTE_UNUSED,
977 arelent *reloc_entry,
979 void *data ATTRIBUTE_UNUSED,
980 asection *input_section,
982 char **error_message ATTRIBUTE_UNUSED)
984 if (output_bfd != NULL
985 && (symbol->flags & BSF_SECTION_SYM) == 0
986 && (! reloc_entry->howto->partial_inplace
987 || reloc_entry->addend == 0))
989 reloc_entry->address += input_section->output_offset;
993 return bfd_reloc_continue;
996 /* Make sure sec_info_type is cleared if sec_info is cleared too. */
999 merge_sections_remove_hook (bfd *abfd ATTRIBUTE_UNUSED,
1002 BFD_ASSERT (sec->sec_info_type == ELF_INFO_TYPE_MERGE);
1003 sec->sec_info_type = ELF_INFO_TYPE_NONE;
1006 /* Finish SHF_MERGE section merging. */
1009 _bfd_elf_merge_sections (bfd *abfd, struct bfd_link_info *info)
1014 if (!is_elf_hash_table (info->hash))
1017 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
1018 if ((ibfd->flags & DYNAMIC) == 0)
1019 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
1020 if ((sec->flags & SEC_MERGE) != 0
1021 && !bfd_is_abs_section (sec->output_section))
1023 struct bfd_elf_section_data *secdata;
1025 secdata = elf_section_data (sec);
1026 if (! _bfd_add_merge_section (abfd,
1027 &elf_hash_table (info)->merge_info,
1028 sec, &secdata->sec_info))
1030 else if (secdata->sec_info)
1031 sec->sec_info_type = ELF_INFO_TYPE_MERGE;
1034 if (elf_hash_table (info)->merge_info != NULL)
1035 _bfd_merge_sections (abfd, info, elf_hash_table (info)->merge_info,
1036 merge_sections_remove_hook);
1041 _bfd_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
1043 sec->output_section = bfd_abs_section_ptr;
1044 sec->output_offset = sec->vma;
1045 if (!is_elf_hash_table (info->hash))
1048 sec->sec_info_type = ELF_INFO_TYPE_JUST_SYMS;
1051 /* Copy the program header and other data from one object module to
1055 _bfd_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
1057 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
1058 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
1061 BFD_ASSERT (!elf_flags_init (obfd)
1062 || (elf_elfheader (obfd)->e_flags
1063 == elf_elfheader (ibfd)->e_flags));
1065 elf_gp (obfd) = elf_gp (ibfd);
1066 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
1067 elf_flags_init (obfd) = TRUE;
1072 get_segment_type (unsigned int p_type)
1077 case PT_NULL: pt = "NULL"; break;
1078 case PT_LOAD: pt = "LOAD"; break;
1079 case PT_DYNAMIC: pt = "DYNAMIC"; break;
1080 case PT_INTERP: pt = "INTERP"; break;
1081 case PT_NOTE: pt = "NOTE"; break;
1082 case PT_SHLIB: pt = "SHLIB"; break;
1083 case PT_PHDR: pt = "PHDR"; break;
1084 case PT_TLS: pt = "TLS"; break;
1085 case PT_GNU_EH_FRAME: pt = "EH_FRAME"; break;
1086 case PT_GNU_STACK: pt = "STACK"; break;
1087 case PT_GNU_RELRO: pt = "RELRO"; break;
1088 default: pt = NULL; break;
1093 /* Print out the program headers. */
1096 _bfd_elf_print_private_bfd_data (bfd *abfd, void *farg)
1099 Elf_Internal_Phdr *p;
1101 bfd_byte *dynbuf = NULL;
1103 p = elf_tdata (abfd)->phdr;
1108 fprintf (f, _("\nProgram Header:\n"));
1109 c = elf_elfheader (abfd)->e_phnum;
1110 for (i = 0; i < c; i++, p++)
1112 const char *pt = get_segment_type (p->p_type);
1117 sprintf (buf, "0x%lx", p->p_type);
1120 fprintf (f, "%8s off 0x", pt);
1121 bfd_fprintf_vma (abfd, f, p->p_offset);
1122 fprintf (f, " vaddr 0x");
1123 bfd_fprintf_vma (abfd, f, p->p_vaddr);
1124 fprintf (f, " paddr 0x");
1125 bfd_fprintf_vma (abfd, f, p->p_paddr);
1126 fprintf (f, " align 2**%u\n", bfd_log2 (p->p_align));
1127 fprintf (f, " filesz 0x");
1128 bfd_fprintf_vma (abfd, f, p->p_filesz);
1129 fprintf (f, " memsz 0x");
1130 bfd_fprintf_vma (abfd, f, p->p_memsz);
1131 fprintf (f, " flags %c%c%c",
1132 (p->p_flags & PF_R) != 0 ? 'r' : '-',
1133 (p->p_flags & PF_W) != 0 ? 'w' : '-',
1134 (p->p_flags & PF_X) != 0 ? 'x' : '-');
1135 if ((p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X)) != 0)
1136 fprintf (f, " %lx", p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X));
1141 s = bfd_get_section_by_name (abfd, ".dynamic");
1145 unsigned long shlink;
1146 bfd_byte *extdyn, *extdynend;
1148 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
1150 fprintf (f, _("\nDynamic Section:\n"));
1152 if (!bfd_malloc_and_get_section (abfd, s, &dynbuf))
1155 elfsec = _bfd_elf_section_from_bfd_section (abfd, s);
1158 shlink = elf_elfsections (abfd)[elfsec]->sh_link;
1160 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
1161 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
1164 extdynend = extdyn + s->size;
1165 for (; extdyn < extdynend; extdyn += extdynsize)
1167 Elf_Internal_Dyn dyn;
1170 bfd_boolean stringp;
1172 (*swap_dyn_in) (abfd, extdyn, &dyn);
1174 if (dyn.d_tag == DT_NULL)
1181 sprintf (ab, "0x%lx", (unsigned long) dyn.d_tag);
1185 case DT_NEEDED: name = "NEEDED"; stringp = TRUE; break;
1186 case DT_PLTRELSZ: name = "PLTRELSZ"; break;
1187 case DT_PLTGOT: name = "PLTGOT"; break;
1188 case DT_HASH: name = "HASH"; break;
1189 case DT_STRTAB: name = "STRTAB"; break;
1190 case DT_SYMTAB: name = "SYMTAB"; break;
1191 case DT_RELA: name = "RELA"; break;
1192 case DT_RELASZ: name = "RELASZ"; break;
1193 case DT_RELAENT: name = "RELAENT"; break;
1194 case DT_STRSZ: name = "STRSZ"; break;
1195 case DT_SYMENT: name = "SYMENT"; break;
1196 case DT_INIT: name = "INIT"; break;
1197 case DT_FINI: name = "FINI"; break;
1198 case DT_SONAME: name = "SONAME"; stringp = TRUE; break;
1199 case DT_RPATH: name = "RPATH"; stringp = TRUE; break;
1200 case DT_SYMBOLIC: name = "SYMBOLIC"; break;
1201 case DT_REL: name = "REL"; break;
1202 case DT_RELSZ: name = "RELSZ"; break;
1203 case DT_RELENT: name = "RELENT"; break;
1204 case DT_PLTREL: name = "PLTREL"; break;
1205 case DT_DEBUG: name = "DEBUG"; break;
1206 case DT_TEXTREL: name = "TEXTREL"; break;
1207 case DT_JMPREL: name = "JMPREL"; break;
1208 case DT_BIND_NOW: name = "BIND_NOW"; break;
1209 case DT_INIT_ARRAY: name = "INIT_ARRAY"; break;
1210 case DT_FINI_ARRAY: name = "FINI_ARRAY"; break;
1211 case DT_INIT_ARRAYSZ: name = "INIT_ARRAYSZ"; break;
1212 case DT_FINI_ARRAYSZ: name = "FINI_ARRAYSZ"; break;
1213 case DT_RUNPATH: name = "RUNPATH"; stringp = TRUE; break;
1214 case DT_FLAGS: name = "FLAGS"; break;
1215 case DT_PREINIT_ARRAY: name = "PREINIT_ARRAY"; break;
1216 case DT_PREINIT_ARRAYSZ: name = "PREINIT_ARRAYSZ"; break;
1217 case DT_CHECKSUM: name = "CHECKSUM"; break;
1218 case DT_PLTPADSZ: name = "PLTPADSZ"; break;
1219 case DT_MOVEENT: name = "MOVEENT"; break;
1220 case DT_MOVESZ: name = "MOVESZ"; break;
1221 case DT_FEATURE: name = "FEATURE"; break;
1222 case DT_POSFLAG_1: name = "POSFLAG_1"; break;
1223 case DT_SYMINSZ: name = "SYMINSZ"; break;
1224 case DT_SYMINENT: name = "SYMINENT"; break;
1225 case DT_CONFIG: name = "CONFIG"; stringp = TRUE; break;
1226 case DT_DEPAUDIT: name = "DEPAUDIT"; stringp = TRUE; break;
1227 case DT_AUDIT: name = "AUDIT"; stringp = TRUE; break;
1228 case DT_PLTPAD: name = "PLTPAD"; break;
1229 case DT_MOVETAB: name = "MOVETAB"; break;
1230 case DT_SYMINFO: name = "SYMINFO"; break;
1231 case DT_RELACOUNT: name = "RELACOUNT"; break;
1232 case DT_RELCOUNT: name = "RELCOUNT"; break;
1233 case DT_FLAGS_1: name = "FLAGS_1"; break;
1234 case DT_VERSYM: name = "VERSYM"; break;
1235 case DT_VERDEF: name = "VERDEF"; break;
1236 case DT_VERDEFNUM: name = "VERDEFNUM"; break;
1237 case DT_VERNEED: name = "VERNEED"; break;
1238 case DT_VERNEEDNUM: name = "VERNEEDNUM"; break;
1239 case DT_AUXILIARY: name = "AUXILIARY"; stringp = TRUE; break;
1240 case DT_USED: name = "USED"; break;
1241 case DT_FILTER: name = "FILTER"; stringp = TRUE; break;
1244 fprintf (f, " %-11s ", name);
1246 fprintf (f, "0x%lx", (unsigned long) dyn.d_un.d_val);
1250 unsigned int tagv = dyn.d_un.d_val;
1252 string = bfd_elf_string_from_elf_section (abfd, shlink, tagv);
1255 fprintf (f, "%s", string);
1264 if ((elf_dynverdef (abfd) != 0 && elf_tdata (abfd)->verdef == NULL)
1265 || (elf_dynverref (abfd) != 0 && elf_tdata (abfd)->verref == NULL))
1267 if (! _bfd_elf_slurp_version_tables (abfd, FALSE))
1271 if (elf_dynverdef (abfd) != 0)
1273 Elf_Internal_Verdef *t;
1275 fprintf (f, _("\nVersion definitions:\n"));
1276 for (t = elf_tdata (abfd)->verdef; t != NULL; t = t->vd_nextdef)
1278 fprintf (f, "%d 0x%2.2x 0x%8.8lx %s\n", t->vd_ndx,
1279 t->vd_flags, t->vd_hash,
1280 t->vd_nodename ? t->vd_nodename : "<corrupt>");
1281 if (t->vd_auxptr != NULL && t->vd_auxptr->vda_nextptr != NULL)
1283 Elf_Internal_Verdaux *a;
1286 for (a = t->vd_auxptr->vda_nextptr;
1290 a->vda_nodename ? a->vda_nodename : "<corrupt>");
1296 if (elf_dynverref (abfd) != 0)
1298 Elf_Internal_Verneed *t;
1300 fprintf (f, _("\nVersion References:\n"));
1301 for (t = elf_tdata (abfd)->verref; t != NULL; t = t->vn_nextref)
1303 Elf_Internal_Vernaux *a;
1305 fprintf (f, _(" required from %s:\n"),
1306 t->vn_filename ? t->vn_filename : "<corrupt>");
1307 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
1308 fprintf (f, " 0x%8.8lx 0x%2.2x %2.2d %s\n", a->vna_hash,
1309 a->vna_flags, a->vna_other,
1310 a->vna_nodename ? a->vna_nodename : "<corrupt>");
1322 /* Display ELF-specific fields of a symbol. */
1325 bfd_elf_print_symbol (bfd *abfd,
1328 bfd_print_symbol_type how)
1333 case bfd_print_symbol_name:
1334 fprintf (file, "%s", symbol->name);
1336 case bfd_print_symbol_more:
1337 fprintf (file, "elf ");
1338 bfd_fprintf_vma (abfd, file, symbol->value);
1339 fprintf (file, " %lx", (long) symbol->flags);
1341 case bfd_print_symbol_all:
1343 const char *section_name;
1344 const char *name = NULL;
1345 const struct elf_backend_data *bed;
1346 unsigned char st_other;
1349 section_name = symbol->section ? symbol->section->name : "(*none*)";
1351 bed = get_elf_backend_data (abfd);
1352 if (bed->elf_backend_print_symbol_all)
1353 name = (*bed->elf_backend_print_symbol_all) (abfd, filep, symbol);
1357 name = symbol->name;
1358 bfd_print_symbol_vandf (abfd, file, symbol);
1361 fprintf (file, " %s\t", section_name);
1362 /* Print the "other" value for a symbol. For common symbols,
1363 we've already printed the size; now print the alignment.
1364 For other symbols, we have no specified alignment, and
1365 we've printed the address; now print the size. */
1366 if (bfd_is_com_section (symbol->section))
1367 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_value;
1369 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_size;
1370 bfd_fprintf_vma (abfd, file, val);
1372 /* If we have version information, print it. */
1373 if (elf_tdata (abfd)->dynversym_section != 0
1374 && (elf_tdata (abfd)->dynverdef_section != 0
1375 || elf_tdata (abfd)->dynverref_section != 0))
1377 unsigned int vernum;
1378 const char *version_string;
1380 vernum = ((elf_symbol_type *) symbol)->version & VERSYM_VERSION;
1383 version_string = "";
1384 else if (vernum == 1)
1385 version_string = "Base";
1386 else if (vernum <= elf_tdata (abfd)->cverdefs)
1388 elf_tdata (abfd)->verdef[vernum - 1].vd_nodename;
1391 Elf_Internal_Verneed *t;
1393 version_string = "";
1394 for (t = elf_tdata (abfd)->verref;
1398 Elf_Internal_Vernaux *a;
1400 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
1402 if (a->vna_other == vernum)
1404 version_string = a->vna_nodename;
1411 if ((((elf_symbol_type *) symbol)->version & VERSYM_HIDDEN) == 0)
1412 fprintf (file, " %-11s", version_string);
1417 fprintf (file, " (%s)", version_string);
1418 for (i = 10 - strlen (version_string); i > 0; --i)
1423 /* If the st_other field is not zero, print it. */
1424 st_other = ((elf_symbol_type *) symbol)->internal_elf_sym.st_other;
1429 case STV_INTERNAL: fprintf (file, " .internal"); break;
1430 case STV_HIDDEN: fprintf (file, " .hidden"); break;
1431 case STV_PROTECTED: fprintf (file, " .protected"); break;
1433 /* Some other non-defined flags are also present, so print
1435 fprintf (file, " 0x%02x", (unsigned int) st_other);
1438 fprintf (file, " %s", name);
1444 /* Create an entry in an ELF linker hash table. */
1446 struct bfd_hash_entry *
1447 _bfd_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
1448 struct bfd_hash_table *table,
1451 /* Allocate the structure if it has not already been allocated by a
1455 entry = bfd_hash_allocate (table, sizeof (struct elf_link_hash_entry));
1460 /* Call the allocation method of the superclass. */
1461 entry = _bfd_link_hash_newfunc (entry, table, string);
1464 struct elf_link_hash_entry *ret = (struct elf_link_hash_entry *) entry;
1465 struct elf_link_hash_table *htab = (struct elf_link_hash_table *) table;
1467 /* Set local fields. */
1470 ret->got = htab->init_got_refcount;
1471 ret->plt = htab->init_plt_refcount;
1472 memset (&ret->size, 0, (sizeof (struct elf_link_hash_entry)
1473 - offsetof (struct elf_link_hash_entry, size)));
1474 /* Assume that we have been called by a non-ELF symbol reader.
1475 This flag is then reset by the code which reads an ELF input
1476 file. This ensures that a symbol created by a non-ELF symbol
1477 reader will have the flag set correctly. */
1484 /* Copy data from an indirect symbol to its direct symbol, hiding the
1485 old indirect symbol. Also used for copying flags to a weakdef. */
1488 _bfd_elf_link_hash_copy_indirect (struct bfd_link_info *info,
1489 struct elf_link_hash_entry *dir,
1490 struct elf_link_hash_entry *ind)
1492 struct elf_link_hash_table *htab;
1494 /* Copy down any references that we may have already seen to the
1495 symbol which just became indirect. */
1497 dir->ref_dynamic |= ind->ref_dynamic;
1498 dir->ref_regular |= ind->ref_regular;
1499 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
1500 dir->non_got_ref |= ind->non_got_ref;
1501 dir->needs_plt |= ind->needs_plt;
1502 dir->pointer_equality_needed |= ind->pointer_equality_needed;
1504 if (ind->root.type != bfd_link_hash_indirect)
1507 /* Copy over the global and procedure linkage table refcount entries.
1508 These may have been already set up by a check_relocs routine. */
1509 htab = elf_hash_table (info);
1510 if (ind->got.refcount > htab->init_got_refcount.refcount)
1512 if (dir->got.refcount < 0)
1513 dir->got.refcount = 0;
1514 dir->got.refcount += ind->got.refcount;
1515 ind->got.refcount = htab->init_got_refcount.refcount;
1518 if (ind->plt.refcount > htab->init_plt_refcount.refcount)
1520 if (dir->plt.refcount < 0)
1521 dir->plt.refcount = 0;
1522 dir->plt.refcount += ind->plt.refcount;
1523 ind->plt.refcount = htab->init_plt_refcount.refcount;
1526 if (ind->dynindx != -1)
1528 if (dir->dynindx != -1)
1529 _bfd_elf_strtab_delref (htab->dynstr, dir->dynstr_index);
1530 dir->dynindx = ind->dynindx;
1531 dir->dynstr_index = ind->dynstr_index;
1533 ind->dynstr_index = 0;
1538 _bfd_elf_link_hash_hide_symbol (struct bfd_link_info *info,
1539 struct elf_link_hash_entry *h,
1540 bfd_boolean force_local)
1542 h->plt = elf_hash_table (info)->init_plt_offset;
1546 h->forced_local = 1;
1547 if (h->dynindx != -1)
1550 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
1556 /* Initialize an ELF linker hash table. */
1559 _bfd_elf_link_hash_table_init
1560 (struct elf_link_hash_table *table,
1562 struct bfd_hash_entry *(*newfunc) (struct bfd_hash_entry *,
1563 struct bfd_hash_table *,
1565 unsigned int entsize)
1568 int can_refcount = get_elf_backend_data (abfd)->can_refcount;
1570 table->dynamic_sections_created = FALSE;
1571 table->dynobj = NULL;
1572 table->init_got_refcount.refcount = can_refcount - 1;
1573 table->init_plt_refcount.refcount = can_refcount - 1;
1574 table->init_got_offset.offset = -(bfd_vma) 1;
1575 table->init_plt_offset.offset = -(bfd_vma) 1;
1576 /* The first dynamic symbol is a dummy. */
1577 table->dynsymcount = 1;
1578 table->dynstr = NULL;
1579 table->bucketcount = 0;
1580 table->needed = NULL;
1582 table->merge_info = NULL;
1583 memset (&table->stab_info, 0, sizeof (table->stab_info));
1584 memset (&table->eh_info, 0, sizeof (table->eh_info));
1585 table->dynlocal = NULL;
1586 table->runpath = NULL;
1587 table->tls_sec = NULL;
1588 table->tls_size = 0;
1589 table->loaded = NULL;
1590 table->is_relocatable_executable = FALSE;
1592 ret = _bfd_link_hash_table_init (&table->root, abfd, newfunc, entsize);
1593 table->root.type = bfd_link_elf_hash_table;
1598 /* Create an ELF linker hash table. */
1600 struct bfd_link_hash_table *
1601 _bfd_elf_link_hash_table_create (bfd *abfd)
1603 struct elf_link_hash_table *ret;
1604 bfd_size_type amt = sizeof (struct elf_link_hash_table);
1606 ret = bfd_malloc (amt);
1610 if (! _bfd_elf_link_hash_table_init (ret, abfd, _bfd_elf_link_hash_newfunc,
1611 sizeof (struct elf_link_hash_entry)))
1620 /* This is a hook for the ELF emulation code in the generic linker to
1621 tell the backend linker what file name to use for the DT_NEEDED
1622 entry for a dynamic object. */
1625 bfd_elf_set_dt_needed_name (bfd *abfd, const char *name)
1627 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
1628 && bfd_get_format (abfd) == bfd_object)
1629 elf_dt_name (abfd) = name;
1633 bfd_elf_get_dyn_lib_class (bfd *abfd)
1636 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
1637 && bfd_get_format (abfd) == bfd_object)
1638 lib_class = elf_dyn_lib_class (abfd);
1645 bfd_elf_set_dyn_lib_class (bfd *abfd, int lib_class)
1647 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
1648 && bfd_get_format (abfd) == bfd_object)
1649 elf_dyn_lib_class (abfd) = lib_class;
1652 /* Get the list of DT_NEEDED entries for a link. This is a hook for
1653 the linker ELF emulation code. */
1655 struct bfd_link_needed_list *
1656 bfd_elf_get_needed_list (bfd *abfd ATTRIBUTE_UNUSED,
1657 struct bfd_link_info *info)
1659 if (! is_elf_hash_table (info->hash))
1661 return elf_hash_table (info)->needed;
1664 /* Get the list of DT_RPATH/DT_RUNPATH entries for a link. This is a
1665 hook for the linker ELF emulation code. */
1667 struct bfd_link_needed_list *
1668 bfd_elf_get_runpath_list (bfd *abfd ATTRIBUTE_UNUSED,
1669 struct bfd_link_info *info)
1671 if (! is_elf_hash_table (info->hash))
1673 return elf_hash_table (info)->runpath;
1676 /* Get the name actually used for a dynamic object for a link. This
1677 is the SONAME entry if there is one. Otherwise, it is the string
1678 passed to bfd_elf_set_dt_needed_name, or it is the filename. */
1681 bfd_elf_get_dt_soname (bfd *abfd)
1683 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
1684 && bfd_get_format (abfd) == bfd_object)
1685 return elf_dt_name (abfd);
1689 /* Get the list of DT_NEEDED entries from a BFD. This is a hook for
1690 the ELF linker emulation code. */
1693 bfd_elf_get_bfd_needed_list (bfd *abfd,
1694 struct bfd_link_needed_list **pneeded)
1697 bfd_byte *dynbuf = NULL;
1699 unsigned long shlink;
1700 bfd_byte *extdyn, *extdynend;
1702 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
1706 if (bfd_get_flavour (abfd) != bfd_target_elf_flavour
1707 || bfd_get_format (abfd) != bfd_object)
1710 s = bfd_get_section_by_name (abfd, ".dynamic");
1711 if (s == NULL || s->size == 0)
1714 if (!bfd_malloc_and_get_section (abfd, s, &dynbuf))
1717 elfsec = _bfd_elf_section_from_bfd_section (abfd, s);
1721 shlink = elf_elfsections (abfd)[elfsec]->sh_link;
1723 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
1724 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
1727 extdynend = extdyn + s->size;
1728 for (; extdyn < extdynend; extdyn += extdynsize)
1730 Elf_Internal_Dyn dyn;
1732 (*swap_dyn_in) (abfd, extdyn, &dyn);
1734 if (dyn.d_tag == DT_NULL)
1737 if (dyn.d_tag == DT_NEEDED)
1740 struct bfd_link_needed_list *l;
1741 unsigned int tagv = dyn.d_un.d_val;
1744 string = bfd_elf_string_from_elf_section (abfd, shlink, tagv);
1749 l = bfd_alloc (abfd, amt);
1770 /* Allocate an ELF string table--force the first byte to be zero. */
1772 struct bfd_strtab_hash *
1773 _bfd_elf_stringtab_init (void)
1775 struct bfd_strtab_hash *ret;
1777 ret = _bfd_stringtab_init ();
1782 loc = _bfd_stringtab_add (ret, "", TRUE, FALSE);
1783 BFD_ASSERT (loc == 0 || loc == (bfd_size_type) -1);
1784 if (loc == (bfd_size_type) -1)
1786 _bfd_stringtab_free (ret);
1793 /* ELF .o/exec file reading */
1795 /* Create a new bfd section from an ELF section header. */
1798 bfd_section_from_shdr (bfd *abfd, unsigned int shindex)
1800 Elf_Internal_Shdr *hdr = elf_elfsections (abfd)[shindex];
1801 Elf_Internal_Ehdr *ehdr = elf_elfheader (abfd);
1802 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
1805 name = bfd_elf_string_from_elf_section (abfd,
1806 elf_elfheader (abfd)->e_shstrndx,
1811 switch (hdr->sh_type)
1814 /* Inactive section. Throw it away. */
1817 case SHT_PROGBITS: /* Normal section with contents. */
1818 case SHT_NOBITS: /* .bss section. */
1819 case SHT_HASH: /* .hash section. */
1820 case SHT_NOTE: /* .note section. */
1821 case SHT_INIT_ARRAY: /* .init_array section. */
1822 case SHT_FINI_ARRAY: /* .fini_array section. */
1823 case SHT_PREINIT_ARRAY: /* .preinit_array section. */
1824 case SHT_GNU_LIBLIST: /* .gnu.liblist section. */
1825 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1827 case SHT_DYNAMIC: /* Dynamic linking information. */
1828 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1830 if (hdr->sh_link > elf_numsections (abfd)
1831 || elf_elfsections (abfd)[hdr->sh_link] == NULL)
1833 if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_STRTAB)
1835 Elf_Internal_Shdr *dynsymhdr;
1837 /* The shared libraries distributed with hpux11 have a bogus
1838 sh_link field for the ".dynamic" section. Find the
1839 string table for the ".dynsym" section instead. */
1840 if (elf_dynsymtab (abfd) != 0)
1842 dynsymhdr = elf_elfsections (abfd)[elf_dynsymtab (abfd)];
1843 hdr->sh_link = dynsymhdr->sh_link;
1847 unsigned int i, num_sec;
1849 num_sec = elf_numsections (abfd);
1850 for (i = 1; i < num_sec; i++)
1852 dynsymhdr = elf_elfsections (abfd)[i];
1853 if (dynsymhdr->sh_type == SHT_DYNSYM)
1855 hdr->sh_link = dynsymhdr->sh_link;
1863 case SHT_SYMTAB: /* A symbol table */
1864 if (elf_onesymtab (abfd) == shindex)
1867 if (hdr->sh_entsize != bed->s->sizeof_sym)
1869 BFD_ASSERT (elf_onesymtab (abfd) == 0);
1870 elf_onesymtab (abfd) = shindex;
1871 elf_tdata (abfd)->symtab_hdr = *hdr;
1872 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->symtab_hdr;
1873 abfd->flags |= HAS_SYMS;
1875 /* Sometimes a shared object will map in the symbol table. If
1876 SHF_ALLOC is set, and this is a shared object, then we also
1877 treat this section as a BFD section. We can not base the
1878 decision purely on SHF_ALLOC, because that flag is sometimes
1879 set in a relocatable object file, which would confuse the
1881 if ((hdr->sh_flags & SHF_ALLOC) != 0
1882 && (abfd->flags & DYNAMIC) != 0
1883 && ! _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1887 /* Go looking for SHT_SYMTAB_SHNDX too, since if there is one we
1888 can't read symbols without that section loaded as well. It
1889 is most likely specified by the next section header. */
1890 if (elf_elfsections (abfd)[elf_symtab_shndx (abfd)]->sh_link != shindex)
1892 unsigned int i, num_sec;
1894 num_sec = elf_numsections (abfd);
1895 for (i = shindex + 1; i < num_sec; i++)
1897 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1898 if (hdr2->sh_type == SHT_SYMTAB_SHNDX
1899 && hdr2->sh_link == shindex)
1903 for (i = 1; i < shindex; i++)
1905 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1906 if (hdr2->sh_type == SHT_SYMTAB_SHNDX
1907 && hdr2->sh_link == shindex)
1911 return bfd_section_from_shdr (abfd, i);
1915 case SHT_DYNSYM: /* A dynamic symbol table */
1916 if (elf_dynsymtab (abfd) == shindex)
1919 if (hdr->sh_entsize != bed->s->sizeof_sym)
1921 BFD_ASSERT (elf_dynsymtab (abfd) == 0);
1922 elf_dynsymtab (abfd) = shindex;
1923 elf_tdata (abfd)->dynsymtab_hdr = *hdr;
1924 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->dynsymtab_hdr;
1925 abfd->flags |= HAS_SYMS;
1927 /* Besides being a symbol table, we also treat this as a regular
1928 section, so that objcopy can handle it. */
1929 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1931 case SHT_SYMTAB_SHNDX: /* Symbol section indices when >64k sections */
1932 if (elf_symtab_shndx (abfd) == shindex)
1935 BFD_ASSERT (elf_symtab_shndx (abfd) == 0);
1936 elf_symtab_shndx (abfd) = shindex;
1937 elf_tdata (abfd)->symtab_shndx_hdr = *hdr;
1938 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->symtab_shndx_hdr;
1941 case SHT_STRTAB: /* A string table */
1942 if (hdr->bfd_section != NULL)
1944 if (ehdr->e_shstrndx == shindex)
1946 elf_tdata (abfd)->shstrtab_hdr = *hdr;
1947 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->shstrtab_hdr;
1950 if (elf_elfsections (abfd)[elf_onesymtab (abfd)]->sh_link == shindex)
1953 elf_tdata (abfd)->strtab_hdr = *hdr;
1954 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->strtab_hdr;
1957 if (elf_elfsections (abfd)[elf_dynsymtab (abfd)]->sh_link == shindex)
1960 elf_tdata (abfd)->dynstrtab_hdr = *hdr;
1961 hdr = &elf_tdata (abfd)->dynstrtab_hdr;
1962 elf_elfsections (abfd)[shindex] = hdr;
1963 /* We also treat this as a regular section, so that objcopy
1965 return _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1969 /* If the string table isn't one of the above, then treat it as a
1970 regular section. We need to scan all the headers to be sure,
1971 just in case this strtab section appeared before the above. */
1972 if (elf_onesymtab (abfd) == 0 || elf_dynsymtab (abfd) == 0)
1974 unsigned int i, num_sec;
1976 num_sec = elf_numsections (abfd);
1977 for (i = 1; i < num_sec; i++)
1979 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1980 if (hdr2->sh_link == shindex)
1982 /* Prevent endless recursion on broken objects. */
1985 if (! bfd_section_from_shdr (abfd, i))
1987 if (elf_onesymtab (abfd) == i)
1989 if (elf_dynsymtab (abfd) == i)
1990 goto dynsymtab_strtab;
1994 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1998 /* *These* do a lot of work -- but build no sections! */
2000 asection *target_sect;
2001 Elf_Internal_Shdr *hdr2;
2002 unsigned int num_sec = elf_numsections (abfd);
2005 != (bfd_size_type) (hdr->sh_type == SHT_REL
2006 ? bed->s->sizeof_rel : bed->s->sizeof_rela))
2009 /* Check for a bogus link to avoid crashing. */
2010 if ((hdr->sh_link >= SHN_LORESERVE && hdr->sh_link <= SHN_HIRESERVE)
2011 || hdr->sh_link >= num_sec)
2013 ((*_bfd_error_handler)
2014 (_("%B: invalid link %lu for reloc section %s (index %u)"),
2015 abfd, hdr->sh_link, name, shindex));
2016 return _bfd_elf_make_section_from_shdr (abfd, hdr, name,
2020 /* For some incomprehensible reason Oracle distributes
2021 libraries for Solaris in which some of the objects have
2022 bogus sh_link fields. It would be nice if we could just
2023 reject them, but, unfortunately, some people need to use
2024 them. We scan through the section headers; if we find only
2025 one suitable symbol table, we clobber the sh_link to point
2026 to it. I hope this doesn't break anything. */
2027 if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_SYMTAB
2028 && elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_DYNSYM)
2034 for (scan = 1; scan < num_sec; scan++)
2036 if (elf_elfsections (abfd)[scan]->sh_type == SHT_SYMTAB
2037 || elf_elfsections (abfd)[scan]->sh_type == SHT_DYNSYM)
2048 hdr->sh_link = found;
2051 /* Get the symbol table. */
2052 if ((elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_SYMTAB
2053 || elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_DYNSYM)
2054 && ! bfd_section_from_shdr (abfd, hdr->sh_link))
2057 /* If this reloc section does not use the main symbol table we
2058 don't treat it as a reloc section. BFD can't adequately
2059 represent such a section, so at least for now, we don't
2060 try. We just present it as a normal section. We also
2061 can't use it as a reloc section if it points to the null
2062 section, an invalid section, or another reloc section. */
2063 if (hdr->sh_link != elf_onesymtab (abfd)
2064 || hdr->sh_info == SHN_UNDEF
2065 || (hdr->sh_info >= SHN_LORESERVE && hdr->sh_info <= SHN_HIRESERVE)
2066 || hdr->sh_info >= num_sec
2067 || elf_elfsections (abfd)[hdr->sh_info]->sh_type == SHT_REL
2068 || elf_elfsections (abfd)[hdr->sh_info]->sh_type == SHT_RELA)
2069 return _bfd_elf_make_section_from_shdr (abfd, hdr, name,
2072 if (! bfd_section_from_shdr (abfd, hdr->sh_info))
2074 target_sect = bfd_section_from_elf_index (abfd, hdr->sh_info);
2075 if (target_sect == NULL)
2078 if ((target_sect->flags & SEC_RELOC) == 0
2079 || target_sect->reloc_count == 0)
2080 hdr2 = &elf_section_data (target_sect)->rel_hdr;
2084 BFD_ASSERT (elf_section_data (target_sect)->rel_hdr2 == NULL);
2085 amt = sizeof (*hdr2);
2086 hdr2 = bfd_alloc (abfd, amt);
2087 elf_section_data (target_sect)->rel_hdr2 = hdr2;
2090 elf_elfsections (abfd)[shindex] = hdr2;
2091 target_sect->reloc_count += NUM_SHDR_ENTRIES (hdr);
2092 target_sect->flags |= SEC_RELOC;
2093 target_sect->relocation = NULL;
2094 target_sect->rel_filepos = hdr->sh_offset;
2095 /* In the section to which the relocations apply, mark whether
2096 its relocations are of the REL or RELA variety. */
2097 if (hdr->sh_size != 0)
2098 target_sect->use_rela_p = hdr->sh_type == SHT_RELA;
2099 abfd->flags |= HAS_RELOC;
2104 case SHT_GNU_verdef:
2105 elf_dynverdef (abfd) = shindex;
2106 elf_tdata (abfd)->dynverdef_hdr = *hdr;
2107 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
2110 case SHT_GNU_versym:
2111 if (hdr->sh_entsize != sizeof (Elf_External_Versym))
2113 elf_dynversym (abfd) = shindex;
2114 elf_tdata (abfd)->dynversym_hdr = *hdr;
2115 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
2117 case SHT_GNU_verneed:
2118 elf_dynverref (abfd) = shindex;
2119 elf_tdata (abfd)->dynverref_hdr = *hdr;
2120 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
2126 /* We need a BFD section for objcopy and relocatable linking,
2127 and it's handy to have the signature available as the section
2129 if (hdr->sh_entsize != GRP_ENTRY_SIZE)
2131 name = group_signature (abfd, hdr);
2134 if (!_bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
2136 if (hdr->contents != NULL)
2138 Elf_Internal_Group *idx = (Elf_Internal_Group *) hdr->contents;
2139 unsigned int n_elt = hdr->sh_size / 4;
2142 if (idx->flags & GRP_COMDAT)
2143 hdr->bfd_section->flags
2144 |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
2146 /* We try to keep the same section order as it comes in. */
2148 while (--n_elt != 0)
2149 if ((s = (--idx)->shdr->bfd_section) != NULL
2150 && elf_next_in_group (s) != NULL)
2152 elf_next_in_group (hdr->bfd_section) = s;
2159 /* Check for any processor-specific section types. */
2160 if (bed->elf_backend_section_from_shdr (abfd, hdr, name, shindex))
2163 if (hdr->sh_type >= SHT_LOUSER && hdr->sh_type <= SHT_HIUSER)
2165 if ((hdr->sh_flags & SHF_ALLOC) != 0)
2166 /* FIXME: How to properly handle allocated section reserved
2167 for applications? */
2168 (*_bfd_error_handler)
2169 (_("%B: don't know how to handle allocated, application "
2170 "specific section `%s' [0x%8x]"),
2171 abfd, name, hdr->sh_type);
2173 /* Allow sections reserved for applications. */
2174 return _bfd_elf_make_section_from_shdr (abfd, hdr, name,
2177 else if (hdr->sh_type >= SHT_LOPROC
2178 && hdr->sh_type <= SHT_HIPROC)
2179 /* FIXME: We should handle this section. */
2180 (*_bfd_error_handler)
2181 (_("%B: don't know how to handle processor specific section "
2183 abfd, name, hdr->sh_type);
2184 else if (hdr->sh_type >= SHT_LOOS && hdr->sh_type <= SHT_HIOS)
2185 /* FIXME: We should handle this section. */
2186 (*_bfd_error_handler)
2187 (_("%B: don't know how to handle OS specific section "
2189 abfd, name, hdr->sh_type);
2191 /* FIXME: We should handle this section. */
2192 (*_bfd_error_handler)
2193 (_("%B: don't know how to handle section `%s' [0x%8x]"),
2194 abfd, name, hdr->sh_type);
2202 /* Return the section for the local symbol specified by ABFD, R_SYMNDX.
2203 Return SEC for sections that have no elf section, and NULL on error. */
2206 bfd_section_from_r_symndx (bfd *abfd,
2207 struct sym_sec_cache *cache,
2209 unsigned long r_symndx)
2211 Elf_Internal_Shdr *symtab_hdr;
2212 unsigned char esym[sizeof (Elf64_External_Sym)];
2213 Elf_External_Sym_Shndx eshndx;
2214 Elf_Internal_Sym isym;
2215 unsigned int ent = r_symndx % LOCAL_SYM_CACHE_SIZE;
2217 if (cache->abfd == abfd && cache->indx[ent] == r_symndx)
2218 return cache->sec[ent];
2220 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2221 if (bfd_elf_get_elf_syms (abfd, symtab_hdr, 1, r_symndx,
2222 &isym, esym, &eshndx) == NULL)
2225 if (cache->abfd != abfd)
2227 memset (cache->indx, -1, sizeof (cache->indx));
2230 cache->indx[ent] = r_symndx;
2231 cache->sec[ent] = sec;
2232 if ((isym.st_shndx != SHN_UNDEF && isym.st_shndx < SHN_LORESERVE)
2233 || isym.st_shndx > SHN_HIRESERVE)
2236 s = bfd_section_from_elf_index (abfd, isym.st_shndx);
2238 cache->sec[ent] = s;
2240 return cache->sec[ent];
2243 /* Given an ELF section number, retrieve the corresponding BFD
2247 bfd_section_from_elf_index (bfd *abfd, unsigned int index)
2249 if (index >= elf_numsections (abfd))
2251 return elf_elfsections (abfd)[index]->bfd_section;
2254 static const struct bfd_elf_special_section special_sections_b[] =
2256 { ".bss", 4, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2257 { NULL, 0, 0, 0, 0 }
2260 static const struct bfd_elf_special_section special_sections_c[] =
2262 { ".comment", 8, 0, SHT_PROGBITS, 0 },
2263 { NULL, 0, 0, 0, 0 }
2266 static const struct bfd_elf_special_section special_sections_d[] =
2268 { ".data", 5, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2269 { ".data1", 6, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2270 { ".debug", 6, 0, SHT_PROGBITS, 0 },
2271 { ".debug_line", 11, 0, SHT_PROGBITS, 0 },
2272 { ".debug_info", 11, 0, SHT_PROGBITS, 0 },
2273 { ".debug_abbrev", 13, 0, SHT_PROGBITS, 0 },
2274 { ".debug_aranges", 14, 0, SHT_PROGBITS, 0 },
2275 { ".dynamic", 8, 0, SHT_DYNAMIC, SHF_ALLOC },
2276 { ".dynstr", 7, 0, SHT_STRTAB, SHF_ALLOC },
2277 { ".dynsym", 7, 0, SHT_DYNSYM, SHF_ALLOC },
2278 { NULL, 0, 0, 0, 0 }
2281 static const struct bfd_elf_special_section special_sections_f[] =
2283 { ".fini", 5, 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2284 { ".fini_array", 11, 0, SHT_FINI_ARRAY, SHF_ALLOC + SHF_WRITE },
2285 { NULL, 0, 0, 0, 0 }
2288 static const struct bfd_elf_special_section special_sections_g[] =
2290 { ".gnu.linkonce.b",15, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2291 { ".got", 4, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2292 { ".gnu.version", 12, 0, SHT_GNU_versym, 0 },
2293 { ".gnu.version_d", 14, 0, SHT_GNU_verdef, 0 },
2294 { ".gnu.version_r", 14, 0, SHT_GNU_verneed, 0 },
2295 { ".gnu.liblist", 12, 0, SHT_GNU_LIBLIST, SHF_ALLOC },
2296 { ".gnu.conflict", 13, 0, SHT_RELA, SHF_ALLOC },
2297 { NULL, 0, 0, 0, 0 }
2300 static const struct bfd_elf_special_section special_sections_h[] =
2302 { ".hash", 5, 0, SHT_HASH, SHF_ALLOC },
2303 { NULL, 0, 0, 0, 0 }
2306 static const struct bfd_elf_special_section special_sections_i[] =
2308 { ".init", 5, 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2309 { ".init_array", 11, 0, SHT_INIT_ARRAY, SHF_ALLOC + SHF_WRITE },
2310 { ".interp", 7, 0, SHT_PROGBITS, 0 },
2311 { NULL, 0, 0, 0, 0 }
2314 static const struct bfd_elf_special_section special_sections_l[] =
2316 { ".line", 5, 0, SHT_PROGBITS, 0 },
2317 { NULL, 0, 0, 0, 0 }
2320 static const struct bfd_elf_special_section special_sections_n[] =
2322 { ".note.GNU-stack",15, 0, SHT_PROGBITS, 0 },
2323 { ".note", 5, -1, SHT_NOTE, 0 },
2324 { NULL, 0, 0, 0, 0 }
2327 static const struct bfd_elf_special_section special_sections_p[] =
2329 { ".preinit_array", 14, 0, SHT_PREINIT_ARRAY, SHF_ALLOC + SHF_WRITE },
2330 { ".plt", 4, 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2331 { NULL, 0, 0, 0, 0 }
2334 static const struct bfd_elf_special_section special_sections_r[] =
2336 { ".rodata", 7, -2, SHT_PROGBITS, SHF_ALLOC },
2337 { ".rodata1", 8, 0, SHT_PROGBITS, SHF_ALLOC },
2338 { ".rela", 5, -1, SHT_RELA, 0 },
2339 { ".rel", 4, -1, SHT_REL, 0 },
2340 { NULL, 0, 0, 0, 0 }
2343 static const struct bfd_elf_special_section special_sections_s[] =
2345 { ".shstrtab", 9, 0, SHT_STRTAB, 0 },
2346 { ".strtab", 7, 0, SHT_STRTAB, 0 },
2347 { ".symtab", 7, 0, SHT_SYMTAB, 0 },
2348 { ".stabstr", 5, 3, SHT_STRTAB, 0 },
2349 { NULL, 0, 0, 0, 0 }
2352 static const struct bfd_elf_special_section special_sections_t[] =
2354 { ".text", 5, -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2355 { ".tbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
2356 { ".tdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
2357 { NULL, 0, 0, 0, 0 }
2360 static const struct bfd_elf_special_section *special_sections[] =
2362 special_sections_b, /* 'b' */
2363 special_sections_c, /* 'b' */
2364 special_sections_d, /* 'd' */
2366 special_sections_f, /* 'f' */
2367 special_sections_g, /* 'g' */
2368 special_sections_h, /* 'h' */
2369 special_sections_i, /* 'i' */
2372 special_sections_l, /* 'l' */
2374 special_sections_n, /* 'n' */
2376 special_sections_p, /* 'p' */
2378 special_sections_r, /* 'r' */
2379 special_sections_s, /* 's' */
2380 special_sections_t, /* 't' */
2383 const struct bfd_elf_special_section *
2384 _bfd_elf_get_special_section (const char *name,
2385 const struct bfd_elf_special_section *spec,
2391 len = strlen (name);
2393 for (i = 0; spec[i].prefix != NULL; i++)
2396 int prefix_len = spec[i].prefix_length;
2398 if (len < prefix_len)
2400 if (memcmp (name, spec[i].prefix, prefix_len) != 0)
2403 suffix_len = spec[i].suffix_length;
2404 if (suffix_len <= 0)
2406 if (name[prefix_len] != 0)
2408 if (suffix_len == 0)
2410 if (name[prefix_len] != '.'
2411 && (suffix_len == -2
2412 || (rela && spec[i].type == SHT_REL)))
2418 if (len < prefix_len + suffix_len)
2420 if (memcmp (name + len - suffix_len,
2421 spec[i].prefix + prefix_len,
2431 const struct bfd_elf_special_section *
2432 _bfd_elf_get_sec_type_attr (bfd *abfd, asection *sec)
2435 const struct bfd_elf_special_section *spec;
2436 const struct elf_backend_data *bed;
2438 /* See if this is one of the special sections. */
2439 if (sec->name == NULL)
2442 bed = get_elf_backend_data (abfd);
2443 spec = bed->special_sections;
2446 spec = _bfd_elf_get_special_section (sec->name,
2447 bed->special_sections,
2453 if (sec->name[0] != '.')
2456 i = sec->name[1] - 'b';
2457 if (i < 0 || i > 't' - 'b')
2460 spec = special_sections[i];
2465 return _bfd_elf_get_special_section (sec->name, spec, sec->use_rela_p);
2469 _bfd_elf_new_section_hook (bfd *abfd, asection *sec)
2471 struct bfd_elf_section_data *sdata;
2472 const struct elf_backend_data *bed;
2473 const struct bfd_elf_special_section *ssect;
2475 sdata = (struct bfd_elf_section_data *) sec->used_by_bfd;
2478 sdata = bfd_zalloc (abfd, sizeof (*sdata));
2481 sec->used_by_bfd = sdata;
2484 /* Indicate whether or not this section should use RELA relocations. */
2485 bed = get_elf_backend_data (abfd);
2486 sec->use_rela_p = bed->default_use_rela_p;
2488 /* When we read a file, we don't need to set ELF section type and
2489 flags. They will be overridden in _bfd_elf_make_section_from_shdr
2490 anyway. We will set ELF section type and flags for all linker
2491 created sections. If user specifies BFD section flags, we will
2492 set ELF section type and flags based on BFD section flags in
2493 elf_fake_sections. */
2494 if ((!sec->flags && abfd->direction != read_direction)
2495 || (sec->flags & SEC_LINKER_CREATED) != 0)
2497 ssect = (*bed->get_sec_type_attr) (abfd, sec);
2500 elf_section_type (sec) = ssect->type;
2501 elf_section_flags (sec) = ssect->attr;
2505 return _bfd_generic_new_section_hook (abfd, sec);
2508 /* Create a new bfd section from an ELF program header.
2510 Since program segments have no names, we generate a synthetic name
2511 of the form segment<NUM>, where NUM is generally the index in the
2512 program header table. For segments that are split (see below) we
2513 generate the names segment<NUM>a and segment<NUM>b.
2515 Note that some program segments may have a file size that is different than
2516 (less than) the memory size. All this means is that at execution the
2517 system must allocate the amount of memory specified by the memory size,
2518 but only initialize it with the first "file size" bytes read from the
2519 file. This would occur for example, with program segments consisting
2520 of combined data+bss.
2522 To handle the above situation, this routine generates TWO bfd sections
2523 for the single program segment. The first has the length specified by
2524 the file size of the segment, and the second has the length specified
2525 by the difference between the two sizes. In effect, the segment is split
2526 into it's initialized and uninitialized parts.
2531 _bfd_elf_make_section_from_phdr (bfd *abfd,
2532 Elf_Internal_Phdr *hdr,
2534 const char *typename)
2542 split = ((hdr->p_memsz > 0)
2543 && (hdr->p_filesz > 0)
2544 && (hdr->p_memsz > hdr->p_filesz));
2545 sprintf (namebuf, "%s%d%s", typename, index, split ? "a" : "");
2546 len = strlen (namebuf) + 1;
2547 name = bfd_alloc (abfd, len);
2550 memcpy (name, namebuf, len);
2551 newsect = bfd_make_section (abfd, name);
2552 if (newsect == NULL)
2554 newsect->vma = hdr->p_vaddr;
2555 newsect->lma = hdr->p_paddr;
2556 newsect->size = hdr->p_filesz;
2557 newsect->filepos = hdr->p_offset;
2558 newsect->flags |= SEC_HAS_CONTENTS;
2559 newsect->alignment_power = bfd_log2 (hdr->p_align);
2560 if (hdr->p_type == PT_LOAD)
2562 newsect->flags |= SEC_ALLOC;
2563 newsect->flags |= SEC_LOAD;
2564 if (hdr->p_flags & PF_X)
2566 /* FIXME: all we known is that it has execute PERMISSION,
2568 newsect->flags |= SEC_CODE;
2571 if (!(hdr->p_flags & PF_W))
2573 newsect->flags |= SEC_READONLY;
2578 sprintf (namebuf, "%s%db", typename, index);
2579 len = strlen (namebuf) + 1;
2580 name = bfd_alloc (abfd, len);
2583 memcpy (name, namebuf, len);
2584 newsect = bfd_make_section (abfd, name);
2585 if (newsect == NULL)
2587 newsect->vma = hdr->p_vaddr + hdr->p_filesz;
2588 newsect->lma = hdr->p_paddr + hdr->p_filesz;
2589 newsect->size = hdr->p_memsz - hdr->p_filesz;
2590 if (hdr->p_type == PT_LOAD)
2592 newsect->flags |= SEC_ALLOC;
2593 if (hdr->p_flags & PF_X)
2594 newsect->flags |= SEC_CODE;
2596 if (!(hdr->p_flags & PF_W))
2597 newsect->flags |= SEC_READONLY;
2604 bfd_section_from_phdr (bfd *abfd, Elf_Internal_Phdr *hdr, int index)
2606 const struct elf_backend_data *bed;
2608 switch (hdr->p_type)
2611 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "null");
2614 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "load");
2617 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "dynamic");
2620 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "interp");
2623 if (! _bfd_elf_make_section_from_phdr (abfd, hdr, index, "note"))
2625 if (! elfcore_read_notes (abfd, hdr->p_offset, hdr->p_filesz))
2630 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "shlib");
2633 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "phdr");
2635 case PT_GNU_EH_FRAME:
2636 return _bfd_elf_make_section_from_phdr (abfd, hdr, index,
2640 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "stack");
2643 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "relro");
2646 /* Check for any processor-specific program segment types. */
2647 bed = get_elf_backend_data (abfd);
2648 return bed->elf_backend_section_from_phdr (abfd, hdr, index, "proc");
2652 /* Initialize REL_HDR, the section-header for new section, containing
2653 relocations against ASECT. If USE_RELA_P is TRUE, we use RELA
2654 relocations; otherwise, we use REL relocations. */
2657 _bfd_elf_init_reloc_shdr (bfd *abfd,
2658 Elf_Internal_Shdr *rel_hdr,
2660 bfd_boolean use_rela_p)
2663 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2664 bfd_size_type amt = sizeof ".rela" + strlen (asect->name);
2666 name = bfd_alloc (abfd, amt);
2669 sprintf (name, "%s%s", use_rela_p ? ".rela" : ".rel", asect->name);
2671 (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd), name,
2673 if (rel_hdr->sh_name == (unsigned int) -1)
2675 rel_hdr->sh_type = use_rela_p ? SHT_RELA : SHT_REL;
2676 rel_hdr->sh_entsize = (use_rela_p
2677 ? bed->s->sizeof_rela
2678 : bed->s->sizeof_rel);
2679 rel_hdr->sh_addralign = 1 << bed->s->log_file_align;
2680 rel_hdr->sh_flags = 0;
2681 rel_hdr->sh_addr = 0;
2682 rel_hdr->sh_size = 0;
2683 rel_hdr->sh_offset = 0;
2688 /* Set up an ELF internal section header for a section. */
2691 elf_fake_sections (bfd *abfd, asection *asect, void *failedptrarg)
2693 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2694 bfd_boolean *failedptr = failedptrarg;
2695 Elf_Internal_Shdr *this_hdr;
2699 /* We already failed; just get out of the bfd_map_over_sections
2704 this_hdr = &elf_section_data (asect)->this_hdr;
2706 this_hdr->sh_name = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
2707 asect->name, FALSE);
2708 if (this_hdr->sh_name == (unsigned int) -1)
2714 /* Don't clear sh_flags. Assembler may set additional bits. */
2716 if ((asect->flags & SEC_ALLOC) != 0
2717 || asect->user_set_vma)
2718 this_hdr->sh_addr = asect->vma;
2720 this_hdr->sh_addr = 0;
2722 this_hdr->sh_offset = 0;
2723 this_hdr->sh_size = asect->size;
2724 this_hdr->sh_link = 0;
2725 this_hdr->sh_addralign = 1 << asect->alignment_power;
2726 /* The sh_entsize and sh_info fields may have been set already by
2727 copy_private_section_data. */
2729 this_hdr->bfd_section = asect;
2730 this_hdr->contents = NULL;
2732 /* If the section type is unspecified, we set it based on
2734 if (this_hdr->sh_type == SHT_NULL)
2736 if ((asect->flags & SEC_GROUP) != 0)
2737 this_hdr->sh_type = SHT_GROUP;
2738 else if ((asect->flags & SEC_ALLOC) != 0
2739 && (((asect->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
2740 || (asect->flags & SEC_NEVER_LOAD) != 0))
2741 this_hdr->sh_type = SHT_NOBITS;
2743 this_hdr->sh_type = SHT_PROGBITS;
2746 switch (this_hdr->sh_type)
2752 case SHT_INIT_ARRAY:
2753 case SHT_FINI_ARRAY:
2754 case SHT_PREINIT_ARRAY:
2761 this_hdr->sh_entsize = bed->s->sizeof_hash_entry;
2765 this_hdr->sh_entsize = bed->s->sizeof_sym;
2769 this_hdr->sh_entsize = bed->s->sizeof_dyn;
2773 if (get_elf_backend_data (abfd)->may_use_rela_p)
2774 this_hdr->sh_entsize = bed->s->sizeof_rela;
2778 if (get_elf_backend_data (abfd)->may_use_rel_p)
2779 this_hdr->sh_entsize = bed->s->sizeof_rel;
2782 case SHT_GNU_versym:
2783 this_hdr->sh_entsize = sizeof (Elf_External_Versym);
2786 case SHT_GNU_verdef:
2787 this_hdr->sh_entsize = 0;
2788 /* objcopy or strip will copy over sh_info, but may not set
2789 cverdefs. The linker will set cverdefs, but sh_info will be
2791 if (this_hdr->sh_info == 0)
2792 this_hdr->sh_info = elf_tdata (abfd)->cverdefs;
2794 BFD_ASSERT (elf_tdata (abfd)->cverdefs == 0
2795 || this_hdr->sh_info == elf_tdata (abfd)->cverdefs);
2798 case SHT_GNU_verneed:
2799 this_hdr->sh_entsize = 0;
2800 /* objcopy or strip will copy over sh_info, but may not set
2801 cverrefs. The linker will set cverrefs, but sh_info will be
2803 if (this_hdr->sh_info == 0)
2804 this_hdr->sh_info = elf_tdata (abfd)->cverrefs;
2806 BFD_ASSERT (elf_tdata (abfd)->cverrefs == 0
2807 || this_hdr->sh_info == elf_tdata (abfd)->cverrefs);
2811 this_hdr->sh_entsize = 4;
2815 if ((asect->flags & SEC_ALLOC) != 0)
2816 this_hdr->sh_flags |= SHF_ALLOC;
2817 if ((asect->flags & SEC_READONLY) == 0)
2818 this_hdr->sh_flags |= SHF_WRITE;
2819 if ((asect->flags & SEC_CODE) != 0)
2820 this_hdr->sh_flags |= SHF_EXECINSTR;
2821 if ((asect->flags & SEC_MERGE) != 0)
2823 this_hdr->sh_flags |= SHF_MERGE;
2824 this_hdr->sh_entsize = asect->entsize;
2825 if ((asect->flags & SEC_STRINGS) != 0)
2826 this_hdr->sh_flags |= SHF_STRINGS;
2828 if ((asect->flags & SEC_GROUP) == 0 && elf_group_name (asect) != NULL)
2829 this_hdr->sh_flags |= SHF_GROUP;
2830 if ((asect->flags & SEC_THREAD_LOCAL) != 0)
2832 this_hdr->sh_flags |= SHF_TLS;
2833 if (asect->size == 0
2834 && (asect->flags & SEC_HAS_CONTENTS) == 0)
2836 struct bfd_link_order *o = asect->map_tail.link_order;
2838 this_hdr->sh_size = 0;
2841 this_hdr->sh_size = o->offset + o->size;
2842 if (this_hdr->sh_size != 0)
2843 this_hdr->sh_type = SHT_NOBITS;
2848 /* Check for processor-specific section types. */
2849 if (bed->elf_backend_fake_sections
2850 && !(*bed->elf_backend_fake_sections) (abfd, this_hdr, asect))
2853 /* If the section has relocs, set up a section header for the
2854 SHT_REL[A] section. If two relocation sections are required for
2855 this section, it is up to the processor-specific back-end to
2856 create the other. */
2857 if ((asect->flags & SEC_RELOC) != 0
2858 && !_bfd_elf_init_reloc_shdr (abfd,
2859 &elf_section_data (asect)->rel_hdr,
2865 /* Fill in the contents of a SHT_GROUP section. */
2868 bfd_elf_set_group_contents (bfd *abfd, asection *sec, void *failedptrarg)
2870 bfd_boolean *failedptr = failedptrarg;
2871 unsigned long symindx;
2872 asection *elt, *first;
2876 /* Ignore linker created group section. See elfNN_ia64_object_p in
2878 if (((sec->flags & (SEC_GROUP | SEC_LINKER_CREATED)) != SEC_GROUP)
2883 if (elf_group_id (sec) != NULL)
2884 symindx = elf_group_id (sec)->udata.i;
2888 /* If called from the assembler, swap_out_syms will have set up
2889 elf_section_syms; If called for "ld -r", use target_index. */
2890 if (elf_section_syms (abfd) != NULL)
2891 symindx = elf_section_syms (abfd)[sec->index]->udata.i;
2893 symindx = sec->target_index;
2895 elf_section_data (sec)->this_hdr.sh_info = symindx;
2897 /* The contents won't be allocated for "ld -r" or objcopy. */
2899 if (sec->contents == NULL)
2902 sec->contents = bfd_alloc (abfd, sec->size);
2904 /* Arrange for the section to be written out. */
2905 elf_section_data (sec)->this_hdr.contents = sec->contents;
2906 if (sec->contents == NULL)
2913 loc = sec->contents + sec->size;
2915 /* Get the pointer to the first section in the group that gas
2916 squirreled away here. objcopy arranges for this to be set to the
2917 start of the input section group. */
2918 first = elt = elf_next_in_group (sec);
2920 /* First element is a flag word. Rest of section is elf section
2921 indices for all the sections of the group. Write them backwards
2922 just to keep the group in the same order as given in .section
2923 directives, not that it matters. */
2932 s = s->output_section;
2935 idx = elf_section_data (s)->this_idx;
2936 H_PUT_32 (abfd, idx, loc);
2937 elt = elf_next_in_group (elt);
2942 if ((loc -= 4) != sec->contents)
2945 H_PUT_32 (abfd, sec->flags & SEC_LINK_ONCE ? GRP_COMDAT : 0, loc);
2948 /* Assign all ELF section numbers. The dummy first section is handled here
2949 too. The link/info pointers for the standard section types are filled
2950 in here too, while we're at it. */
2953 assign_section_numbers (bfd *abfd, struct bfd_link_info *link_info)
2955 struct elf_obj_tdata *t = elf_tdata (abfd);
2957 unsigned int section_number, secn;
2958 Elf_Internal_Shdr **i_shdrp;
2959 struct bfd_elf_section_data *d;
2963 _bfd_elf_strtab_clear_all_refs (elf_shstrtab (abfd));
2965 /* SHT_GROUP sections are in relocatable files only. */
2966 if (link_info == NULL || link_info->relocatable)
2968 /* Put SHT_GROUP sections first. */
2969 for (sec = abfd->sections; sec != NULL; sec = sec->next)
2971 d = elf_section_data (sec);
2973 if (d->this_hdr.sh_type == SHT_GROUP)
2975 if (sec->flags & SEC_LINKER_CREATED)
2977 /* Remove the linker created SHT_GROUP sections. */
2978 bfd_section_list_remove (abfd, sec);
2979 abfd->section_count--;
2983 if (section_number == SHN_LORESERVE)
2984 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2985 d->this_idx = section_number++;
2991 for (sec = abfd->sections; sec; sec = sec->next)
2993 d = elf_section_data (sec);
2995 if (d->this_hdr.sh_type != SHT_GROUP)
2997 if (section_number == SHN_LORESERVE)
2998 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2999 d->this_idx = section_number++;
3001 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->this_hdr.sh_name);
3002 if ((sec->flags & SEC_RELOC) == 0)
3006 if (section_number == SHN_LORESERVE)
3007 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
3008 d->rel_idx = section_number++;
3009 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rel_hdr.sh_name);
3014 if (section_number == SHN_LORESERVE)
3015 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
3016 d->rel_idx2 = section_number++;
3017 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rel_hdr2->sh_name);
3023 if (section_number == SHN_LORESERVE)
3024 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
3025 t->shstrtab_section = section_number++;
3026 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->shstrtab_hdr.sh_name);
3027 elf_elfheader (abfd)->e_shstrndx = t->shstrtab_section;
3029 if (bfd_get_symcount (abfd) > 0)
3031 if (section_number == SHN_LORESERVE)
3032 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
3033 t->symtab_section = section_number++;
3034 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->symtab_hdr.sh_name);
3035 if (section_number > SHN_LORESERVE - 2)
3037 if (section_number == SHN_LORESERVE)
3038 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
3039 t->symtab_shndx_section = section_number++;
3040 t->symtab_shndx_hdr.sh_name
3041 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
3042 ".symtab_shndx", FALSE);
3043 if (t->symtab_shndx_hdr.sh_name == (unsigned int) -1)
3046 if (section_number == SHN_LORESERVE)
3047 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
3048 t->strtab_section = section_number++;
3049 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->strtab_hdr.sh_name);
3052 _bfd_elf_strtab_finalize (elf_shstrtab (abfd));
3053 t->shstrtab_hdr.sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
3055 elf_numsections (abfd) = section_number;
3056 elf_elfheader (abfd)->e_shnum = section_number;
3057 if (section_number > SHN_LORESERVE)
3058 elf_elfheader (abfd)->e_shnum -= SHN_HIRESERVE + 1 - SHN_LORESERVE;
3060 /* Set up the list of section header pointers, in agreement with the
3062 i_shdrp = bfd_zalloc2 (abfd, section_number, sizeof (Elf_Internal_Shdr *));
3063 if (i_shdrp == NULL)
3066 i_shdrp[0] = bfd_zalloc (abfd, sizeof (Elf_Internal_Shdr));
3067 if (i_shdrp[0] == NULL)
3069 bfd_release (abfd, i_shdrp);
3073 elf_elfsections (abfd) = i_shdrp;
3075 i_shdrp[t->shstrtab_section] = &t->shstrtab_hdr;
3076 if (bfd_get_symcount (abfd) > 0)
3078 i_shdrp[t->symtab_section] = &t->symtab_hdr;
3079 if (elf_numsections (abfd) > SHN_LORESERVE)
3081 i_shdrp[t->symtab_shndx_section] = &t->symtab_shndx_hdr;
3082 t->symtab_shndx_hdr.sh_link = t->symtab_section;
3084 i_shdrp[t->strtab_section] = &t->strtab_hdr;
3085 t->symtab_hdr.sh_link = t->strtab_section;
3088 for (sec = abfd->sections; sec; sec = sec->next)
3090 struct bfd_elf_section_data *d = elf_section_data (sec);
3094 i_shdrp[d->this_idx] = &d->this_hdr;
3095 if (d->rel_idx != 0)
3096 i_shdrp[d->rel_idx] = &d->rel_hdr;
3097 if (d->rel_idx2 != 0)
3098 i_shdrp[d->rel_idx2] = d->rel_hdr2;
3100 /* Fill in the sh_link and sh_info fields while we're at it. */
3102 /* sh_link of a reloc section is the section index of the symbol
3103 table. sh_info is the section index of the section to which
3104 the relocation entries apply. */
3105 if (d->rel_idx != 0)
3107 d->rel_hdr.sh_link = t->symtab_section;
3108 d->rel_hdr.sh_info = d->this_idx;
3110 if (d->rel_idx2 != 0)
3112 d->rel_hdr2->sh_link = t->symtab_section;
3113 d->rel_hdr2->sh_info = d->this_idx;
3116 /* We need to set up sh_link for SHF_LINK_ORDER. */
3117 if ((d->this_hdr.sh_flags & SHF_LINK_ORDER) != 0)
3119 s = elf_linked_to_section (sec);
3122 /* elf_linked_to_section points to the input section. */
3123 if (link_info != NULL)
3125 /* Check discarded linkonce section. */
3126 if (elf_discarded_section (s))
3129 (*_bfd_error_handler)
3130 (_("%B: sh_link of section `%A' points to discarded section `%A' of `%B'"),
3131 abfd, d->this_hdr.bfd_section,
3133 /* Point to the kept section if it has the same
3134 size as the discarded one. */
3135 kept = _bfd_elf_check_kept_section (s);
3138 bfd_set_error (bfd_error_bad_value);
3144 s = s->output_section;
3145 BFD_ASSERT (s != NULL);
3149 /* Handle objcopy. */
3150 if (s->output_section == NULL)
3152 (*_bfd_error_handler)
3153 (_("%B: sh_link of section `%A' points to removed section `%A' of `%B'"),
3154 abfd, d->this_hdr.bfd_section, s, s->owner);
3155 bfd_set_error (bfd_error_bad_value);
3158 s = s->output_section;
3160 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3165 The Intel C compiler generates SHT_IA_64_UNWIND with
3166 SHF_LINK_ORDER. But it doesn't set the sh_link or
3167 sh_info fields. Hence we could get the situation
3169 const struct elf_backend_data *bed
3170 = get_elf_backend_data (abfd);
3171 if (bed->link_order_error_handler)
3172 bed->link_order_error_handler
3173 (_("%B: warning: sh_link not set for section `%A'"),
3178 switch (d->this_hdr.sh_type)
3182 /* A reloc section which we are treating as a normal BFD
3183 section. sh_link is the section index of the symbol
3184 table. sh_info is the section index of the section to
3185 which the relocation entries apply. We assume that an
3186 allocated reloc section uses the dynamic symbol table.
3187 FIXME: How can we be sure? */
3188 s = bfd_get_section_by_name (abfd, ".dynsym");
3190 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3192 /* We look up the section the relocs apply to by name. */
3194 if (d->this_hdr.sh_type == SHT_REL)
3198 s = bfd_get_section_by_name (abfd, name);
3200 d->this_hdr.sh_info = elf_section_data (s)->this_idx;
3204 /* We assume that a section named .stab*str is a stabs
3205 string section. We look for a section with the same name
3206 but without the trailing ``str'', and set its sh_link
3207 field to point to this section. */
3208 if (strncmp (sec->name, ".stab", sizeof ".stab" - 1) == 0
3209 && strcmp (sec->name + strlen (sec->name) - 3, "str") == 0)
3214 len = strlen (sec->name);
3215 alc = bfd_malloc (len - 2);
3218 memcpy (alc, sec->name, len - 3);
3219 alc[len - 3] = '\0';
3220 s = bfd_get_section_by_name (abfd, alc);
3224 elf_section_data (s)->this_hdr.sh_link = d->this_idx;
3226 /* This is a .stab section. */
3227 if (elf_section_data (s)->this_hdr.sh_entsize == 0)
3228 elf_section_data (s)->this_hdr.sh_entsize
3229 = 4 + 2 * bfd_get_arch_size (abfd) / 8;
3236 case SHT_GNU_verneed:
3237 case SHT_GNU_verdef:
3238 /* sh_link is the section header index of the string table
3239 used for the dynamic entries, or the symbol table, or the
3241 s = bfd_get_section_by_name (abfd, ".dynstr");
3243 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3246 case SHT_GNU_LIBLIST:
3247 /* sh_link is the section header index of the prelink library
3249 used for the dynamic entries, or the symbol table, or the
3251 s = bfd_get_section_by_name (abfd, (sec->flags & SEC_ALLOC)
3252 ? ".dynstr" : ".gnu.libstr");
3254 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3258 case SHT_GNU_versym:
3259 /* sh_link is the section header index of the symbol table
3260 this hash table or version table is for. */
3261 s = bfd_get_section_by_name (abfd, ".dynsym");
3263 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3267 d->this_hdr.sh_link = t->symtab_section;
3271 for (secn = 1; secn < section_number; ++secn)
3272 if (i_shdrp[secn] == NULL)
3273 i_shdrp[secn] = i_shdrp[0];
3275 i_shdrp[secn]->sh_name = _bfd_elf_strtab_offset (elf_shstrtab (abfd),
3276 i_shdrp[secn]->sh_name);
3280 /* Map symbol from it's internal number to the external number, moving
3281 all local symbols to be at the head of the list. */
3284 sym_is_global (bfd *abfd, asymbol *sym)
3286 /* If the backend has a special mapping, use it. */
3287 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3288 if (bed->elf_backend_sym_is_global)
3289 return (*bed->elf_backend_sym_is_global) (abfd, sym);
3291 return ((sym->flags & (BSF_GLOBAL | BSF_WEAK)) != 0
3292 || bfd_is_und_section (bfd_get_section (sym))
3293 || bfd_is_com_section (bfd_get_section (sym)));
3296 /* Don't output section symbols for sections that are not going to be
3297 output. Also, don't output section symbols for reloc and other
3298 special sections. */
3301 ignore_section_sym (bfd *abfd, asymbol *sym)
3303 return ((sym->flags & BSF_SECTION_SYM) != 0
3305 || (sym->section->owner != abfd
3306 && (sym->section->output_section->owner != abfd
3307 || sym->section->output_offset != 0))));
3311 elf_map_symbols (bfd *abfd)
3313 unsigned int symcount = bfd_get_symcount (abfd);
3314 asymbol **syms = bfd_get_outsymbols (abfd);
3315 asymbol **sect_syms;
3316 unsigned int num_locals = 0;
3317 unsigned int num_globals = 0;
3318 unsigned int num_locals2 = 0;
3319 unsigned int num_globals2 = 0;
3326 fprintf (stderr, "elf_map_symbols\n");
3330 for (asect = abfd->sections; asect; asect = asect->next)
3332 if (max_index < asect->index)
3333 max_index = asect->index;
3337 sect_syms = bfd_zalloc2 (abfd, max_index, sizeof (asymbol *));
3338 if (sect_syms == NULL)
3340 elf_section_syms (abfd) = sect_syms;
3341 elf_num_section_syms (abfd) = max_index;
3343 /* Init sect_syms entries for any section symbols we have already
3344 decided to output. */
3345 for (idx = 0; idx < symcount; idx++)
3347 asymbol *sym = syms[idx];
3349 if ((sym->flags & BSF_SECTION_SYM) != 0
3350 && !ignore_section_sym (abfd, sym))
3352 asection *sec = sym->section;
3354 if (sec->owner != abfd)
3355 sec = sec->output_section;
3357 sect_syms[sec->index] = syms[idx];
3361 /* Classify all of the symbols. */
3362 for (idx = 0; idx < symcount; idx++)
3364 if (ignore_section_sym (abfd, syms[idx]))
3366 if (!sym_is_global (abfd, syms[idx]))
3372 /* We will be adding a section symbol for each normal BFD section. Most
3373 sections will already have a section symbol in outsymbols, but
3374 eg. SHT_GROUP sections will not, and we need the section symbol mapped
3375 at least in that case. */
3376 for (asect = abfd->sections; asect; asect = asect->next)
3378 if (sect_syms[asect->index] == NULL)
3380 if (!sym_is_global (abfd, asect->symbol))
3387 /* Now sort the symbols so the local symbols are first. */
3388 new_syms = bfd_alloc2 (abfd, num_locals + num_globals, sizeof (asymbol *));
3390 if (new_syms == NULL)
3393 for (idx = 0; idx < symcount; idx++)
3395 asymbol *sym = syms[idx];
3398 if (ignore_section_sym (abfd, sym))
3400 if (!sym_is_global (abfd, sym))
3403 i = num_locals + num_globals2++;
3405 sym->udata.i = i + 1;
3407 for (asect = abfd->sections; asect; asect = asect->next)
3409 if (sect_syms[asect->index] == NULL)
3411 asymbol *sym = asect->symbol;
3414 sect_syms[asect->index] = sym;
3415 if (!sym_is_global (abfd, sym))
3418 i = num_locals + num_globals2++;
3420 sym->udata.i = i + 1;
3424 bfd_set_symtab (abfd, new_syms, num_locals + num_globals);
3426 elf_num_locals (abfd) = num_locals;
3427 elf_num_globals (abfd) = num_globals;
3431 /* Align to the maximum file alignment that could be required for any
3432 ELF data structure. */
3434 static inline file_ptr
3435 align_file_position (file_ptr off, int align)
3437 return (off + align - 1) & ~(align - 1);
3440 /* Assign a file position to a section, optionally aligning to the
3441 required section alignment. */
3444 _bfd_elf_assign_file_position_for_section (Elf_Internal_Shdr *i_shdrp,
3452 al = i_shdrp->sh_addralign;
3454 offset = BFD_ALIGN (offset, al);
3456 i_shdrp->sh_offset = offset;
3457 if (i_shdrp->bfd_section != NULL)
3458 i_shdrp->bfd_section->filepos = offset;
3459 if (i_shdrp->sh_type != SHT_NOBITS)
3460 offset += i_shdrp->sh_size;
3464 /* Compute the file positions we are going to put the sections at, and
3465 otherwise prepare to begin writing out the ELF file. If LINK_INFO
3466 is not NULL, this is being called by the ELF backend linker. */
3469 _bfd_elf_compute_section_file_positions (bfd *abfd,
3470 struct bfd_link_info *link_info)
3472 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3474 struct bfd_strtab_hash *strtab = NULL;
3475 Elf_Internal_Shdr *shstrtab_hdr;
3477 if (abfd->output_has_begun)
3480 /* Do any elf backend specific processing first. */
3481 if (bed->elf_backend_begin_write_processing)
3482 (*bed->elf_backend_begin_write_processing) (abfd, link_info);
3484 if (! prep_headers (abfd))
3487 /* Post process the headers if necessary. */
3488 if (bed->elf_backend_post_process_headers)
3489 (*bed->elf_backend_post_process_headers) (abfd, link_info);
3492 bfd_map_over_sections (abfd, elf_fake_sections, &failed);
3496 if (!assign_section_numbers (abfd, link_info))
3499 /* The backend linker builds symbol table information itself. */
3500 if (link_info == NULL && bfd_get_symcount (abfd) > 0)
3502 /* Non-zero if doing a relocatable link. */
3503 int relocatable_p = ! (abfd->flags & (EXEC_P | DYNAMIC));
3505 if (! swap_out_syms (abfd, &strtab, relocatable_p))
3509 if (link_info == NULL)
3511 bfd_map_over_sections (abfd, bfd_elf_set_group_contents, &failed);
3516 shstrtab_hdr = &elf_tdata (abfd)->shstrtab_hdr;
3517 /* sh_name was set in prep_headers. */
3518 shstrtab_hdr->sh_type = SHT_STRTAB;
3519 shstrtab_hdr->sh_flags = 0;
3520 shstrtab_hdr->sh_addr = 0;
3521 shstrtab_hdr->sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
3522 shstrtab_hdr->sh_entsize = 0;
3523 shstrtab_hdr->sh_link = 0;
3524 shstrtab_hdr->sh_info = 0;
3525 /* sh_offset is set in assign_file_positions_except_relocs. */
3526 shstrtab_hdr->sh_addralign = 1;
3528 if (!assign_file_positions_except_relocs (abfd, link_info))
3531 if (link_info == NULL && bfd_get_symcount (abfd) > 0)
3534 Elf_Internal_Shdr *hdr;
3536 off = elf_tdata (abfd)->next_file_pos;
3538 hdr = &elf_tdata (abfd)->symtab_hdr;
3539 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3541 hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
3542 if (hdr->sh_size != 0)
3543 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3545 hdr = &elf_tdata (abfd)->strtab_hdr;
3546 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3548 elf_tdata (abfd)->next_file_pos = off;
3550 /* Now that we know where the .strtab section goes, write it
3552 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
3553 || ! _bfd_stringtab_emit (abfd, strtab))
3555 _bfd_stringtab_free (strtab);
3558 abfd->output_has_begun = TRUE;
3563 /* Create a mapping from a set of sections to a program segment. */
3565 static struct elf_segment_map *
3566 make_mapping (bfd *abfd,
3567 asection **sections,
3572 struct elf_segment_map *m;
3577 amt = sizeof (struct elf_segment_map);
3578 amt += (to - from - 1) * sizeof (asection *);
3579 m = bfd_zalloc (abfd, amt);
3583 m->p_type = PT_LOAD;
3584 for (i = from, hdrpp = sections + from; i < to; i++, hdrpp++)
3585 m->sections[i - from] = *hdrpp;
3586 m->count = to - from;
3588 if (from == 0 && phdr)
3590 /* Include the headers in the first PT_LOAD segment. */
3591 m->includes_filehdr = 1;
3592 m->includes_phdrs = 1;
3598 /* Create the PT_DYNAMIC segment, which includes DYNSEC. Returns NULL
3601 struct elf_segment_map *
3602 _bfd_elf_make_dynamic_segment (bfd *abfd, asection *dynsec)
3604 struct elf_segment_map *m;
3606 m = bfd_zalloc (abfd, sizeof (struct elf_segment_map));
3610 m->p_type = PT_DYNAMIC;
3612 m->sections[0] = dynsec;
3617 /* Set up a mapping from BFD sections to program segments. */
3620 map_sections_to_segments (bfd *abfd)
3622 asection **sections = NULL;
3626 struct elf_segment_map *mfirst;
3627 struct elf_segment_map **pm;
3628 struct elf_segment_map *m;
3631 unsigned int phdr_index;
3632 bfd_vma maxpagesize;
3634 bfd_boolean phdr_in_segment = TRUE;
3635 bfd_boolean writable;
3637 asection *first_tls = NULL;
3638 asection *dynsec, *eh_frame_hdr;
3641 if (elf_tdata (abfd)->segment_map != NULL)
3644 if (bfd_count_sections (abfd) == 0)
3647 /* Select the allocated sections, and sort them. */
3649 sections = bfd_malloc2 (bfd_count_sections (abfd), sizeof (asection *));
3650 if (sections == NULL)
3654 for (s = abfd->sections; s != NULL; s = s->next)
3656 if ((s->flags & SEC_ALLOC) != 0)
3662 BFD_ASSERT (i <= bfd_count_sections (abfd));
3665 qsort (sections, (size_t) count, sizeof (asection *), elf_sort_sections);
3667 /* Build the mapping. */
3672 /* If we have a .interp section, then create a PT_PHDR segment for
3673 the program headers and a PT_INTERP segment for the .interp
3675 s = bfd_get_section_by_name (abfd, ".interp");
3676 if (s != NULL && (s->flags & SEC_LOAD) != 0)
3678 amt = sizeof (struct elf_segment_map);
3679 m = bfd_zalloc (abfd, amt);
3683 m->p_type = PT_PHDR;
3684 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
3685 m->p_flags = PF_R | PF_X;
3686 m->p_flags_valid = 1;
3687 m->includes_phdrs = 1;
3692 amt = sizeof (struct elf_segment_map);
3693 m = bfd_zalloc (abfd, amt);
3697 m->p_type = PT_INTERP;
3705 /* Look through the sections. We put sections in the same program
3706 segment when the start of the second section can be placed within
3707 a few bytes of the end of the first section. */
3711 maxpagesize = get_elf_backend_data (abfd)->maxpagesize;
3713 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
3715 && (dynsec->flags & SEC_LOAD) == 0)
3718 /* Deal with -Ttext or something similar such that the first section
3719 is not adjacent to the program headers. This is an
3720 approximation, since at this point we don't know exactly how many
3721 program headers we will need. */
3724 bfd_size_type phdr_size;
3726 phdr_size = elf_tdata (abfd)->program_header_size;
3728 phdr_size = get_elf_backend_data (abfd)->s->sizeof_phdr;
3729 if ((abfd->flags & D_PAGED) == 0
3730 || sections[0]->lma < phdr_size
3731 || sections[0]->lma % maxpagesize < phdr_size % maxpagesize)
3732 phdr_in_segment = FALSE;
3735 for (i = 0, hdrpp = sections; i < count; i++, hdrpp++)
3738 bfd_boolean new_segment;
3742 /* See if this section and the last one will fit in the same
3745 if (last_hdr == NULL)
3747 /* If we don't have a segment yet, then we don't need a new
3748 one (we build the last one after this loop). */
3749 new_segment = FALSE;
3751 else if (last_hdr->lma - last_hdr->vma != hdr->lma - hdr->vma)
3753 /* If this section has a different relation between the
3754 virtual address and the load address, then we need a new
3758 else if (BFD_ALIGN (last_hdr->lma + last_size, maxpagesize)
3759 < BFD_ALIGN (hdr->lma, maxpagesize))
3761 /* If putting this section in this segment would force us to
3762 skip a page in the segment, then we need a new segment. */
3765 else if ((last_hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0
3766 && (hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) != 0)
3768 /* We don't want to put a loadable section after a
3769 nonloadable section in the same segment.
3770 Consider .tbss sections as loadable for this purpose. */
3773 else if ((abfd->flags & D_PAGED) == 0)
3775 /* If the file is not demand paged, which means that we
3776 don't require the sections to be correctly aligned in the
3777 file, then there is no other reason for a new segment. */
3778 new_segment = FALSE;
3781 && (hdr->flags & SEC_READONLY) == 0
3782 && (((last_hdr->lma + last_size - 1)
3783 & ~(maxpagesize - 1))
3784 != (hdr->lma & ~(maxpagesize - 1))))
3786 /* We don't want to put a writable section in a read only
3787 segment, unless they are on the same page in memory
3788 anyhow. We already know that the last section does not
3789 bring us past the current section on the page, so the
3790 only case in which the new section is not on the same
3791 page as the previous section is when the previous section
3792 ends precisely on a page boundary. */
3797 /* Otherwise, we can use the same segment. */
3798 new_segment = FALSE;
3803 if ((hdr->flags & SEC_READONLY) == 0)
3806 /* .tbss sections effectively have zero size. */
3807 if ((hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD)) != SEC_THREAD_LOCAL)
3808 last_size = hdr->size;
3814 /* We need a new program segment. We must create a new program
3815 header holding all the sections from phdr_index until hdr. */
3817 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
3824 if ((hdr->flags & SEC_READONLY) == 0)
3830 /* .tbss sections effectively have zero size. */
3831 if ((hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD)) != SEC_THREAD_LOCAL)
3832 last_size = hdr->size;
3836 phdr_in_segment = FALSE;
3839 /* Create a final PT_LOAD program segment. */
3840 if (last_hdr != NULL)
3842 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
3850 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
3853 m = _bfd_elf_make_dynamic_segment (abfd, dynsec);
3860 /* For each loadable .note section, add a PT_NOTE segment. We don't
3861 use bfd_get_section_by_name, because if we link together
3862 nonloadable .note sections and loadable .note sections, we will
3863 generate two .note sections in the output file. FIXME: Using
3864 names for section types is bogus anyhow. */
3865 for (s = abfd->sections; s != NULL; s = s->next)
3867 if ((s->flags & SEC_LOAD) != 0
3868 && strncmp (s->name, ".note", 5) == 0)
3870 amt = sizeof (struct elf_segment_map);
3871 m = bfd_zalloc (abfd, amt);
3875 m->p_type = PT_NOTE;
3882 if (s->flags & SEC_THREAD_LOCAL)
3890 /* If there are any SHF_TLS output sections, add PT_TLS segment. */
3895 amt = sizeof (struct elf_segment_map);
3896 amt += (tls_count - 1) * sizeof (asection *);
3897 m = bfd_zalloc (abfd, amt);
3902 m->count = tls_count;
3903 /* Mandated PF_R. */
3905 m->p_flags_valid = 1;
3906 for (i = 0; i < tls_count; ++i)
3908 BFD_ASSERT (first_tls->flags & SEC_THREAD_LOCAL);
3909 m->sections[i] = first_tls;
3910 first_tls = first_tls->next;
3917 /* If there is a .eh_frame_hdr section, throw in a PT_GNU_EH_FRAME
3919 eh_frame_hdr = elf_tdata (abfd)->eh_frame_hdr;
3920 if (eh_frame_hdr != NULL
3921 && (eh_frame_hdr->output_section->flags & SEC_LOAD) != 0)
3923 amt = sizeof (struct elf_segment_map);
3924 m = bfd_zalloc (abfd, amt);
3928 m->p_type = PT_GNU_EH_FRAME;
3930 m->sections[0] = eh_frame_hdr->output_section;
3936 if (elf_tdata (abfd)->stack_flags)
3938 amt = sizeof (struct elf_segment_map);
3939 m = bfd_zalloc (abfd, amt);
3943 m->p_type = PT_GNU_STACK;
3944 m->p_flags = elf_tdata (abfd)->stack_flags;
3945 m->p_flags_valid = 1;
3951 if (elf_tdata (abfd)->relro)
3953 amt = sizeof (struct elf_segment_map);
3954 m = bfd_zalloc (abfd, amt);
3958 m->p_type = PT_GNU_RELRO;
3960 m->p_flags_valid = 1;
3969 elf_tdata (abfd)->segment_map = mfirst;
3973 if (sections != NULL)
3978 /* Sort sections by address. */
3981 elf_sort_sections (const void *arg1, const void *arg2)
3983 const asection *sec1 = *(const asection **) arg1;
3984 const asection *sec2 = *(const asection **) arg2;
3985 bfd_size_type size1, size2;
3987 /* Sort by LMA first, since this is the address used to
3988 place the section into a segment. */
3989 if (sec1->lma < sec2->lma)
3991 else if (sec1->lma > sec2->lma)
3994 /* Then sort by VMA. Normally the LMA and the VMA will be
3995 the same, and this will do nothing. */
3996 if (sec1->vma < sec2->vma)
3998 else if (sec1->vma > sec2->vma)
4001 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
4003 #define TOEND(x) (((x)->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0)
4009 /* If the indicies are the same, do not return 0
4010 here, but continue to try the next comparison. */
4011 if (sec1->target_index - sec2->target_index != 0)
4012 return sec1->target_index - sec2->target_index;
4017 else if (TOEND (sec2))
4022 /* Sort by size, to put zero sized sections
4023 before others at the same address. */
4025 size1 = (sec1->flags & SEC_LOAD) ? sec1->size : 0;
4026 size2 = (sec2->flags & SEC_LOAD) ? sec2->size : 0;
4033 return sec1->target_index - sec2->target_index;
4036 /* Ian Lance Taylor writes:
4038 We shouldn't be using % with a negative signed number. That's just
4039 not good. We have to make sure either that the number is not
4040 negative, or that the number has an unsigned type. When the types
4041 are all the same size they wind up as unsigned. When file_ptr is a
4042 larger signed type, the arithmetic winds up as signed long long,
4045 What we're trying to say here is something like ``increase OFF by
4046 the least amount that will cause it to be equal to the VMA modulo
4048 /* In other words, something like:
4050 vma_offset = m->sections[0]->vma % bed->maxpagesize;
4051 off_offset = off % bed->maxpagesize;
4052 if (vma_offset < off_offset)
4053 adjustment = vma_offset + bed->maxpagesize - off_offset;
4055 adjustment = vma_offset - off_offset;
4057 which can can be collapsed into the expression below. */
4060 vma_page_aligned_bias (bfd_vma vma, ufile_ptr off, bfd_vma maxpagesize)
4062 return ((vma - off) % maxpagesize);
4066 print_segment_map (bfd *abfd)
4068 struct elf_segment_map *m;
4071 fprintf (stderr, _(" Section to Segment mapping:\n"));
4072 fprintf (stderr, _(" Segment Sections...\n"));
4074 for (i= 0, m = elf_tdata (abfd)->segment_map;
4078 const char *pt = get_segment_type (m->p_type);
4083 if (m->p_type >= PT_LOPROC && m->p_type <= PT_HIPROC)
4084 sprintf (buf, "LOPROC+%7.7x",
4085 (unsigned int) (m->p_type - PT_LOPROC));
4086 else if (m->p_type >= PT_LOOS && m->p_type <= PT_HIOS)
4087 sprintf (buf, "LOOS+%7.7x",
4088 (unsigned int) (m->p_type - PT_LOOS));
4090 snprintf (buf, sizeof (buf), "%8.8x",
4091 (unsigned int) m->p_type);
4094 fprintf (stderr, " %2.2d: %14.14s: ", i, pt);
4095 for (j = 0; j < m->count; j++)
4096 fprintf (stderr, "%s ", m->sections [j]->name);
4101 /* Assign file positions to the sections based on the mapping from
4102 sections to segments. This function also sets up some fields in
4106 assign_file_positions_for_load_sections (bfd *abfd,
4107 struct bfd_link_info *link_info)
4109 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4110 struct elf_segment_map *m;
4111 Elf_Internal_Phdr *phdrs;
4112 Elf_Internal_Phdr *p;
4118 if (elf_tdata (abfd)->segment_map == NULL)
4120 if (! map_sections_to_segments (abfd))
4125 /* The placement algorithm assumes that non allocated sections are
4126 not in PT_LOAD segments. We ensure this here by removing such
4127 sections from the segment map. We also remove excluded
4129 for (m = elf_tdata (abfd)->segment_map;
4133 unsigned int new_count;
4136 for (i = 0; i < m->count; i ++)
4138 if ((m->sections[i]->flags & SEC_EXCLUDE) == 0
4139 && ((m->sections[i]->flags & SEC_ALLOC) != 0
4140 || m->p_type != PT_LOAD))
4143 m->sections[new_count] = m->sections[i];
4149 if (new_count != m->count)
4150 m->count = new_count;
4154 if (bed->elf_backend_modify_segment_map)
4156 if (! (*bed->elf_backend_modify_segment_map) (abfd, link_info))
4161 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
4164 elf_elfheader (abfd)->e_phoff = bed->s->sizeof_ehdr;
4165 elf_elfheader (abfd)->e_phentsize = bed->s->sizeof_phdr;
4166 elf_elfheader (abfd)->e_phnum = count;
4170 elf_tdata (abfd)->next_file_pos = bed->s->sizeof_ehdr;
4174 /* If we already counted the number of program segments, make sure
4175 that we allocated enough space. This happens when SIZEOF_HEADERS
4176 is used in a linker script. */
4177 alloc = elf_tdata (abfd)->program_header_size / bed->s->sizeof_phdr;
4178 if (alloc != 0 && count > alloc)
4180 ((*_bfd_error_handler)
4181 (_("%B: Not enough room for program headers (allocated %u, need %u)"),
4182 abfd, alloc, count));
4183 print_segment_map (abfd);
4184 bfd_set_error (bfd_error_bad_value);
4191 elf_tdata (abfd)->program_header_size = alloc * bed->s->sizeof_phdr;
4194 phdrs = bfd_alloc2 (abfd, alloc, sizeof (Elf_Internal_Phdr));
4195 elf_tdata (abfd)->phdr = phdrs;
4199 off = bed->s->sizeof_ehdr;
4200 off += alloc * bed->s->sizeof_phdr;
4202 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
4208 /* If elf_segment_map is not from map_sections_to_segments, the
4209 sections may not be correctly ordered. NOTE: sorting should
4210 not be done to the PT_NOTE section of a corefile, which may
4211 contain several pseudo-sections artificially created by bfd.
4212 Sorting these pseudo-sections breaks things badly. */
4214 && !(elf_elfheader (abfd)->e_type == ET_CORE
4215 && m->p_type == PT_NOTE))
4216 qsort (m->sections, (size_t) m->count, sizeof (asection *),
4219 /* An ELF segment (described by Elf_Internal_Phdr) may contain a
4220 number of sections with contents contributing to both p_filesz
4221 and p_memsz, followed by a number of sections with no contents
4222 that just contribute to p_memsz. In this loop, OFF tracks next
4223 available file offset for PT_LOAD and PT_NOTE segments. VOFF is
4224 an adjustment we use for segments that have no file contents
4225 but need zero filled memory allocation. */
4227 p->p_type = m->p_type;
4228 p->p_flags = m->p_flags;
4230 if (p->p_type == PT_LOAD
4233 bfd_size_type align;
4235 unsigned int align_power = 0;
4237 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
4239 unsigned int secalign;
4241 secalign = bfd_get_section_alignment (abfd, *secpp);
4242 if (secalign > align_power)
4243 align_power = secalign;
4245 align = (bfd_size_type) 1 << align_power;
4247 if ((abfd->flags & D_PAGED) != 0 && bed->maxpagesize > align)
4248 align = bed->maxpagesize;
4250 adjust = vma_page_aligned_bias (m->sections[0]->vma, off, align);
4253 && !m->includes_filehdr
4254 && !m->includes_phdrs
4255 && (ufile_ptr) off >= align)
4257 /* If the first section isn't loadable, the same holds for
4258 any other sections. Since the segment won't need file
4259 space, we can make p_offset overlap some prior segment.
4260 However, .tbss is special. If a segment starts with
4261 .tbss, we need to look at the next section to decide
4262 whether the segment has any loadable sections. */
4264 while ((m->sections[i]->flags & SEC_LOAD) == 0)
4266 if ((m->sections[i]->flags & SEC_THREAD_LOCAL) == 0
4270 voff = adjust - align;
4276 /* Make sure the .dynamic section is the first section in the
4277 PT_DYNAMIC segment. */
4278 else if (p->p_type == PT_DYNAMIC
4280 && strcmp (m->sections[0]->name, ".dynamic") != 0)
4283 (_("%B: The first section in the PT_DYNAMIC segment is not the .dynamic section"),
4285 bfd_set_error (bfd_error_bad_value);
4292 p->p_vaddr = m->sections[0]->vma;
4294 if (m->p_paddr_valid)
4295 p->p_paddr = m->p_paddr;
4296 else if (m->count == 0)
4299 p->p_paddr = m->sections[0]->lma;
4301 if (p->p_type == PT_LOAD
4302 && (abfd->flags & D_PAGED) != 0)
4303 p->p_align = bed->maxpagesize;
4304 else if (m->count == 0)
4305 p->p_align = 1 << bed->s->log_file_align;
4313 if (m->includes_filehdr)
4315 if (! m->p_flags_valid)
4318 p->p_filesz = bed->s->sizeof_ehdr;
4319 p->p_memsz = bed->s->sizeof_ehdr;
4322 BFD_ASSERT (p->p_type == PT_LOAD);
4324 if (p->p_vaddr < (bfd_vma) off)
4326 (*_bfd_error_handler)
4327 (_("%B: Not enough room for program headers, try linking with -N"),
4329 bfd_set_error (bfd_error_bad_value);
4334 if (! m->p_paddr_valid)
4339 if (m->includes_phdrs)
4341 if (! m->p_flags_valid)
4344 if (!m->includes_filehdr)
4346 p->p_offset = bed->s->sizeof_ehdr;
4350 BFD_ASSERT (p->p_type == PT_LOAD);
4351 p->p_vaddr -= off - p->p_offset;
4352 if (! m->p_paddr_valid)
4353 p->p_paddr -= off - p->p_offset;
4357 p->p_filesz += alloc * bed->s->sizeof_phdr;
4358 p->p_memsz += alloc * bed->s->sizeof_phdr;
4361 if (p->p_type == PT_LOAD
4362 || (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core))
4364 if (! m->includes_filehdr && ! m->includes_phdrs)
4365 p->p_offset = off + voff;
4370 adjust = off - (p->p_offset + p->p_filesz);
4371 p->p_filesz += adjust;
4372 p->p_memsz += adjust;
4376 /* Set up p_filesz, p_memsz, p_align and p_flags from the section
4377 maps. Set filepos for sections in PT_LOAD segments, and in
4378 core files, for sections in PT_NOTE segments.
4379 assign_file_positions_for_non_load_sections will set filepos
4380 for other sections and update p_filesz for other segments. */
4381 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
4385 bfd_size_type align;
4389 align = 1 << bfd_get_section_alignment (abfd, sec);
4391 if (p->p_type == PT_LOAD
4392 || p->p_type == PT_TLS)
4394 bfd_signed_vma adjust;
4396 if ((flags & SEC_LOAD) != 0)
4398 adjust = sec->lma - (p->p_paddr + p->p_filesz);
4401 (*_bfd_error_handler)
4402 (_("%B: section %A lma 0x%lx overlaps previous sections"),
4403 abfd, sec, (unsigned long) sec->lma);
4407 p->p_filesz += adjust;
4408 p->p_memsz += adjust;
4410 /* .tbss is special. It doesn't contribute to p_memsz of
4412 else if ((flags & SEC_ALLOC) != 0
4413 && ((flags & SEC_THREAD_LOCAL) == 0
4414 || p->p_type == PT_TLS))
4416 /* The section VMA must equal the file position
4417 modulo the page size. */
4418 bfd_size_type page = align;
4419 if ((abfd->flags & D_PAGED) != 0 && bed->maxpagesize > page)
4420 page = bed->maxpagesize;
4421 adjust = vma_page_aligned_bias (sec->vma,
4422 p->p_vaddr + p->p_memsz,
4424 p->p_memsz += adjust;
4428 if (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core)
4430 /* The section at i == 0 is the one that actually contains
4436 p->p_filesz = sec->size;
4442 /* The rest are fake sections that shouldn't be written. */
4451 if (p->p_type == PT_LOAD)
4454 /* FIXME: The SEC_HAS_CONTENTS test here dates back to
4455 1997, and the exact reason for it isn't clear. One
4456 plausible explanation is that it is to work around
4457 a problem we have with linker scripts using data
4458 statements in NOLOAD sections. I don't think it
4459 makes a great deal of sense to have such a section
4460 assigned to a PT_LOAD segment, but apparently
4461 people do this. The data statement results in a
4462 bfd_data_link_order being built, and these need
4463 section contents to write into. Eventually, we get
4464 to _bfd_elf_write_object_contents which writes any
4465 section with contents to the output. Make room
4466 here for the write, so that following segments are
4468 if ((flags & SEC_LOAD) != 0
4469 || (flags & SEC_HAS_CONTENTS) != 0)
4473 if ((flags & SEC_LOAD) != 0)
4475 p->p_filesz += sec->size;
4476 p->p_memsz += sec->size;
4479 /* .tbss is special. It doesn't contribute to p_memsz of
4481 else if ((flags & SEC_ALLOC) != 0
4482 && ((flags & SEC_THREAD_LOCAL) == 0
4483 || p->p_type == PT_TLS))
4484 p->p_memsz += sec->size;
4486 if (p->p_type == PT_TLS
4488 && (sec->flags & SEC_HAS_CONTENTS) == 0)
4490 struct bfd_link_order *o = sec->map_tail.link_order;
4492 p->p_memsz += o->offset + o->size;
4495 if (align > p->p_align
4496 && (p->p_type != PT_LOAD
4497 || (abfd->flags & D_PAGED) == 0
4498 || ((p->p_vaddr - p->p_offset) & (align - 1)) == 0))
4502 if (! m->p_flags_valid)
4505 if ((flags & SEC_CODE) != 0)
4507 if ((flags & SEC_READONLY) == 0)
4513 /* Clear out any program headers we allocated but did not use. */
4514 for (; count < alloc; count++, p++)
4516 memset (p, 0, sizeof *p);
4517 p->p_type = PT_NULL;
4520 elf_tdata (abfd)->next_file_pos = off;
4524 /* Assign file positions for the other sections. */
4527 assign_file_positions_for_non_load_sections (bfd *abfd,
4528 struct bfd_link_info *link_info)
4530 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4531 Elf_Internal_Shdr **i_shdrpp;
4532 Elf_Internal_Shdr **hdrpp;
4533 Elf_Internal_Phdr *phdrs;
4534 Elf_Internal_Phdr *p;
4535 struct elf_segment_map *m;
4536 bfd_vma filehdr_vaddr, filehdr_paddr;
4537 bfd_vma phdrs_vaddr, phdrs_paddr;
4539 unsigned int num_sec;
4543 i_shdrpp = elf_elfsections (abfd);
4544 num_sec = elf_numsections (abfd);
4545 off = elf_tdata (abfd)->next_file_pos;
4546 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
4548 struct elf_obj_tdata *tdata = elf_tdata (abfd);
4549 Elf_Internal_Shdr *hdr;
4552 if (hdr->bfd_section != NULL
4553 && hdr->bfd_section->filepos != 0)
4554 hdr->sh_offset = hdr->bfd_section->filepos;
4555 else if ((hdr->sh_flags & SHF_ALLOC) != 0)
4557 ((*_bfd_error_handler)
4558 (_("%B: warning: allocated section `%s' not in segment"),
4560 (hdr->bfd_section == NULL
4562 : hdr->bfd_section->name)));
4563 if ((abfd->flags & D_PAGED) != 0)
4564 off += vma_page_aligned_bias (hdr->sh_addr, off,
4567 off += vma_page_aligned_bias (hdr->sh_addr, off,
4569 off = _bfd_elf_assign_file_position_for_section (hdr, off,
4572 else if (((hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
4573 && hdr->bfd_section == NULL)
4574 || hdr == i_shdrpp[tdata->symtab_section]
4575 || hdr == i_shdrpp[tdata->symtab_shndx_section]
4576 || hdr == i_shdrpp[tdata->strtab_section])
4577 hdr->sh_offset = -1;
4579 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4581 if (i == SHN_LORESERVE - 1)
4583 i += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4584 hdrpp += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4588 /* Now that we have set the section file positions, we can set up
4589 the file positions for the non PT_LOAD segments. */
4593 phdrs_vaddr = bed->maxpagesize + bed->s->sizeof_ehdr;
4595 phdrs = elf_tdata (abfd)->phdr;
4596 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
4601 if (p->p_type != PT_LOAD)
4604 if (m->includes_filehdr)
4606 filehdr_vaddr = p->p_vaddr;
4607 filehdr_paddr = p->p_paddr;
4609 if (m->includes_phdrs)
4611 phdrs_vaddr = p->p_vaddr;
4612 phdrs_paddr = p->p_paddr;
4613 if (m->includes_filehdr)
4615 phdrs_vaddr += bed->s->sizeof_ehdr;
4616 phdrs_paddr += bed->s->sizeof_ehdr;
4621 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
4627 if (p->p_type != PT_LOAD
4628 && (p->p_type != PT_NOTE || bfd_get_format (abfd) != bfd_core))
4630 Elf_Internal_Shdr *hdr;
4631 BFD_ASSERT (!m->includes_filehdr && !m->includes_phdrs);
4633 hdr = &elf_section_data (m->sections[m->count - 1])->this_hdr;
4634 p->p_filesz = (m->sections[m->count - 1]->filepos
4635 - m->sections[0]->filepos);
4636 if (hdr->sh_type != SHT_NOBITS)
4637 p->p_filesz += hdr->sh_size;
4639 p->p_offset = m->sections[0]->filepos;
4644 if (m->includes_filehdr)
4646 p->p_vaddr = filehdr_vaddr;
4647 if (! m->p_paddr_valid)
4648 p->p_paddr = filehdr_paddr;
4650 else if (m->includes_phdrs)
4652 p->p_vaddr = phdrs_vaddr;
4653 if (! m->p_paddr_valid)
4654 p->p_paddr = phdrs_paddr;
4656 else if (p->p_type == PT_GNU_RELRO)
4658 Elf_Internal_Phdr *lp;
4660 for (lp = phdrs; lp < phdrs + count; ++lp)
4662 if (lp->p_type == PT_LOAD
4663 && lp->p_vaddr <= link_info->relro_end
4664 && lp->p_vaddr >= link_info->relro_start
4665 && lp->p_vaddr + lp->p_filesz
4666 >= link_info->relro_end)
4670 if (lp < phdrs + count
4671 && link_info->relro_end > lp->p_vaddr)
4673 p->p_vaddr = lp->p_vaddr;
4674 p->p_paddr = lp->p_paddr;
4675 p->p_offset = lp->p_offset;
4676 p->p_filesz = link_info->relro_end - lp->p_vaddr;
4677 p->p_memsz = p->p_filesz;
4679 p->p_flags = (lp->p_flags & ~PF_W);
4683 memset (p, 0, sizeof *p);
4684 p->p_type = PT_NULL;
4690 elf_tdata (abfd)->next_file_pos = off;
4695 /* Get the size of the program header.
4697 If this is called by the linker before any of the section VMA's are set, it
4698 can't calculate the correct value for a strange memory layout. This only
4699 happens when SIZEOF_HEADERS is used in a linker script. In this case,
4700 SORTED_HDRS is NULL and we assume the normal scenario of one text and one
4701 data segment (exclusive of .interp and .dynamic).
4703 ??? User written scripts must either not use SIZEOF_HEADERS, or assume there
4704 will be two segments. */
4706 static bfd_size_type
4707 get_program_header_size (bfd *abfd)
4711 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4713 /* We can't return a different result each time we're called. */
4714 if (elf_tdata (abfd)->program_header_size != 0)
4715 return elf_tdata (abfd)->program_header_size;
4717 if (elf_tdata (abfd)->segment_map != NULL)
4719 struct elf_segment_map *m;
4722 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
4724 elf_tdata (abfd)->program_header_size = segs * bed->s->sizeof_phdr;
4725 return elf_tdata (abfd)->program_header_size;
4728 /* Assume we will need exactly two PT_LOAD segments: one for text
4729 and one for data. */
4732 s = bfd_get_section_by_name (abfd, ".interp");
4733 if (s != NULL && (s->flags & SEC_LOAD) != 0)
4735 /* If we have a loadable interpreter section, we need a
4736 PT_INTERP segment. In this case, assume we also need a
4737 PT_PHDR segment, although that may not be true for all
4742 if (bfd_get_section_by_name (abfd, ".dynamic") != NULL)
4744 /* We need a PT_DYNAMIC segment. */
4748 if (elf_tdata (abfd)->eh_frame_hdr)
4750 /* We need a PT_GNU_EH_FRAME segment. */
4754 if (elf_tdata (abfd)->stack_flags)
4756 /* We need a PT_GNU_STACK segment. */
4760 if (elf_tdata (abfd)->relro)
4762 /* We need a PT_GNU_RELRO segment. */
4766 for (s = abfd->sections; s != NULL; s = s->next)
4768 if ((s->flags & SEC_LOAD) != 0
4769 && strncmp (s->name, ".note", 5) == 0)
4771 /* We need a PT_NOTE segment. */
4776 for (s = abfd->sections; s != NULL; s = s->next)
4778 if (s->flags & SEC_THREAD_LOCAL)
4780 /* We need a PT_TLS segment. */
4786 /* Let the backend count up any program headers it might need. */
4787 if (bed->elf_backend_additional_program_headers)
4791 a = (*bed->elf_backend_additional_program_headers) (abfd);
4797 elf_tdata (abfd)->program_header_size = segs * bed->s->sizeof_phdr;
4798 return elf_tdata (abfd)->program_header_size;
4801 /* Work out the file positions of all the sections. This is called by
4802 _bfd_elf_compute_section_file_positions. All the section sizes and
4803 VMAs must be known before this is called.
4805 Reloc sections come in two flavours: Those processed specially as
4806 "side-channel" data attached to a section to which they apply, and
4807 those that bfd doesn't process as relocations. The latter sort are
4808 stored in a normal bfd section by bfd_section_from_shdr. We don't
4809 consider the former sort here, unless they form part of the loadable
4810 image. Reloc sections not assigned here will be handled later by
4811 assign_file_positions_for_relocs.
4813 We also don't set the positions of the .symtab and .strtab here. */
4816 assign_file_positions_except_relocs (bfd *abfd,
4817 struct bfd_link_info *link_info)
4819 struct elf_obj_tdata *tdata = elf_tdata (abfd);
4820 Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
4822 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4824 if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0
4825 && bfd_get_format (abfd) != bfd_core)
4827 Elf_Internal_Shdr ** const i_shdrpp = elf_elfsections (abfd);
4828 unsigned int num_sec = elf_numsections (abfd);
4829 Elf_Internal_Shdr **hdrpp;
4832 /* Start after the ELF header. */
4833 off = i_ehdrp->e_ehsize;
4835 /* We are not creating an executable, which means that we are
4836 not creating a program header, and that the actual order of
4837 the sections in the file is unimportant. */
4838 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
4840 Elf_Internal_Shdr *hdr;
4843 if (((hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
4844 && hdr->bfd_section == NULL)
4845 || i == tdata->symtab_section
4846 || i == tdata->symtab_shndx_section
4847 || i == tdata->strtab_section)
4849 hdr->sh_offset = -1;
4852 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4854 if (i == SHN_LORESERVE - 1)
4856 i += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4857 hdrpp += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4865 /* Assign file positions for the loaded sections based on the
4866 assignment of sections to segments. */
4867 if (!assign_file_positions_for_load_sections (abfd, link_info))
4870 /* And for non-load sections. */
4871 if (!assign_file_positions_for_non_load_sections (abfd, link_info))
4874 /* Write out the program headers. */
4875 alloc = tdata->program_header_size / bed->s->sizeof_phdr;
4876 if (bfd_seek (abfd, (bfd_signed_vma) bed->s->sizeof_ehdr, SEEK_SET) != 0
4877 || bed->s->write_out_phdrs (abfd, tdata->phdr, alloc) != 0)
4880 off = tdata->next_file_pos;
4883 /* Place the section headers. */
4884 off = align_file_position (off, 1 << bed->s->log_file_align);
4885 i_ehdrp->e_shoff = off;
4886 off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize;
4888 tdata->next_file_pos = off;
4894 prep_headers (bfd *abfd)
4896 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
4897 Elf_Internal_Phdr *i_phdrp = 0; /* Program header table, internal form */
4898 Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */
4899 struct elf_strtab_hash *shstrtab;
4900 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4902 i_ehdrp = elf_elfheader (abfd);
4903 i_shdrp = elf_elfsections (abfd);
4905 shstrtab = _bfd_elf_strtab_init ();
4906 if (shstrtab == NULL)
4909 elf_shstrtab (abfd) = shstrtab;
4911 i_ehdrp->e_ident[EI_MAG0] = ELFMAG0;
4912 i_ehdrp->e_ident[EI_MAG1] = ELFMAG1;
4913 i_ehdrp->e_ident[EI_MAG2] = ELFMAG2;
4914 i_ehdrp->e_ident[EI_MAG3] = ELFMAG3;
4916 i_ehdrp->e_ident[EI_CLASS] = bed->s->elfclass;
4917 i_ehdrp->e_ident[EI_DATA] =
4918 bfd_big_endian (abfd) ? ELFDATA2MSB : ELFDATA2LSB;
4919 i_ehdrp->e_ident[EI_VERSION] = bed->s->ev_current;
4921 if ((abfd->flags & DYNAMIC) != 0)
4922 i_ehdrp->e_type = ET_DYN;
4923 else if ((abfd->flags & EXEC_P) != 0)
4924 i_ehdrp->e_type = ET_EXEC;
4925 else if (bfd_get_format (abfd) == bfd_core)
4926 i_ehdrp->e_type = ET_CORE;
4928 i_ehdrp->e_type = ET_REL;
4930 switch (bfd_get_arch (abfd))
4932 case bfd_arch_unknown:
4933 i_ehdrp->e_machine = EM_NONE;
4936 /* There used to be a long list of cases here, each one setting
4937 e_machine to the same EM_* macro #defined as ELF_MACHINE_CODE
4938 in the corresponding bfd definition. To avoid duplication,
4939 the switch was removed. Machines that need special handling
4940 can generally do it in elf_backend_final_write_processing(),
4941 unless they need the information earlier than the final write.
4942 Such need can generally be supplied by replacing the tests for
4943 e_machine with the conditions used to determine it. */
4945 i_ehdrp->e_machine = bed->elf_machine_code;
4948 i_ehdrp->e_version = bed->s->ev_current;
4949 i_ehdrp->e_ehsize = bed->s->sizeof_ehdr;
4951 /* No program header, for now. */
4952 i_ehdrp->e_phoff = 0;
4953 i_ehdrp->e_phentsize = 0;
4954 i_ehdrp->e_phnum = 0;
4956 /* Each bfd section is section header entry. */
4957 i_ehdrp->e_entry = bfd_get_start_address (abfd);
4958 i_ehdrp->e_shentsize = bed->s->sizeof_shdr;
4960 /* If we're building an executable, we'll need a program header table. */
4961 if (abfd->flags & EXEC_P)
4962 /* It all happens later. */
4966 i_ehdrp->e_phentsize = 0;
4968 i_ehdrp->e_phoff = 0;
4971 elf_tdata (abfd)->symtab_hdr.sh_name =
4972 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".symtab", FALSE);
4973 elf_tdata (abfd)->strtab_hdr.sh_name =
4974 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".strtab", FALSE);
4975 elf_tdata (abfd)->shstrtab_hdr.sh_name =
4976 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".shstrtab", FALSE);
4977 if (elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
4978 || elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
4979 || elf_tdata (abfd)->shstrtab_hdr.sh_name == (unsigned int) -1)
4985 /* Assign file positions for all the reloc sections which are not part
4986 of the loadable file image. */
4989 _bfd_elf_assign_file_positions_for_relocs (bfd *abfd)
4992 unsigned int i, num_sec;
4993 Elf_Internal_Shdr **shdrpp;
4995 off = elf_tdata (abfd)->next_file_pos;
4997 num_sec = elf_numsections (abfd);
4998 for (i = 1, shdrpp = elf_elfsections (abfd) + 1; i < num_sec; i++, shdrpp++)
5000 Elf_Internal_Shdr *shdrp;
5003 if ((shdrp->sh_type == SHT_REL || shdrp->sh_type == SHT_RELA)
5004 && shdrp->sh_offset == -1)
5005 off = _bfd_elf_assign_file_position_for_section (shdrp, off, TRUE);
5008 elf_tdata (abfd)->next_file_pos = off;
5012 _bfd_elf_write_object_contents (bfd *abfd)
5014 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5015 Elf_Internal_Ehdr *i_ehdrp;
5016 Elf_Internal_Shdr **i_shdrp;
5018 unsigned int count, num_sec;
5020 if (! abfd->output_has_begun
5021 && ! _bfd_elf_compute_section_file_positions (abfd, NULL))
5024 i_shdrp = elf_elfsections (abfd);
5025 i_ehdrp = elf_elfheader (abfd);
5028 bfd_map_over_sections (abfd, bed->s->write_relocs, &failed);
5032 _bfd_elf_assign_file_positions_for_relocs (abfd);
5034 /* After writing the headers, we need to write the sections too... */
5035 num_sec = elf_numsections (abfd);
5036 for (count = 1; count < num_sec; count++)
5038 if (bed->elf_backend_section_processing)
5039 (*bed->elf_backend_section_processing) (abfd, i_shdrp[count]);
5040 if (i_shdrp[count]->contents)
5042 bfd_size_type amt = i_shdrp[count]->sh_size;
5044 if (bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET) != 0
5045 || bfd_bwrite (i_shdrp[count]->contents, amt, abfd) != amt)
5048 if (count == SHN_LORESERVE - 1)
5049 count += SHN_HIRESERVE + 1 - SHN_LORESERVE;
5052 /* Write out the section header names. */
5053 if (elf_shstrtab (abfd) != NULL
5054 && (bfd_seek (abfd, elf_tdata (abfd)->shstrtab_hdr.sh_offset, SEEK_SET) != 0
5055 || ! _bfd_elf_strtab_emit (abfd, elf_shstrtab (abfd))))
5058 if (bed->elf_backend_final_write_processing)
5059 (*bed->elf_backend_final_write_processing) (abfd,
5060 elf_tdata (abfd)->linker);
5062 return bed->s->write_shdrs_and_ehdr (abfd);
5066 _bfd_elf_write_corefile_contents (bfd *abfd)
5068 /* Hopefully this can be done just like an object file. */
5069 return _bfd_elf_write_object_contents (abfd);
5072 /* Given a section, search the header to find them. */
5075 _bfd_elf_section_from_bfd_section (bfd *abfd, struct bfd_section *asect)
5077 const struct elf_backend_data *bed;
5080 if (elf_section_data (asect) != NULL
5081 && elf_section_data (asect)->this_idx != 0)
5082 return elf_section_data (asect)->this_idx;
5084 if (bfd_is_abs_section (asect))
5086 else if (bfd_is_com_section (asect))
5088 else if (bfd_is_und_section (asect))
5093 bed = get_elf_backend_data (abfd);
5094 if (bed->elf_backend_section_from_bfd_section)
5098 if ((*bed->elf_backend_section_from_bfd_section) (abfd, asect, &retval))
5103 bfd_set_error (bfd_error_nonrepresentable_section);
5108 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
5112 _bfd_elf_symbol_from_bfd_symbol (bfd *abfd, asymbol **asym_ptr_ptr)
5114 asymbol *asym_ptr = *asym_ptr_ptr;
5116 flagword flags = asym_ptr->flags;
5118 /* When gas creates relocations against local labels, it creates its
5119 own symbol for the section, but does put the symbol into the
5120 symbol chain, so udata is 0. When the linker is generating
5121 relocatable output, this section symbol may be for one of the
5122 input sections rather than the output section. */
5123 if (asym_ptr->udata.i == 0
5124 && (flags & BSF_SECTION_SYM)
5125 && asym_ptr->section)
5130 sec = asym_ptr->section;
5131 if (sec->owner != abfd && sec->output_section != NULL)
5132 sec = sec->output_section;
5133 if (sec->owner == abfd
5134 && (indx = sec->index) < elf_num_section_syms (abfd)
5135 && elf_section_syms (abfd)[indx] != NULL)
5136 asym_ptr->udata.i = elf_section_syms (abfd)[indx]->udata.i;
5139 idx = asym_ptr->udata.i;
5143 /* This case can occur when using --strip-symbol on a symbol
5144 which is used in a relocation entry. */
5145 (*_bfd_error_handler)
5146 (_("%B: symbol `%s' required but not present"),
5147 abfd, bfd_asymbol_name (asym_ptr));
5148 bfd_set_error (bfd_error_no_symbols);
5155 "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n",
5156 (long) asym_ptr, asym_ptr->name, idx, flags,
5157 elf_symbol_flags (flags));
5165 /* Rewrite program header information. */
5168 rewrite_elf_program_header (bfd *ibfd, bfd *obfd)
5170 Elf_Internal_Ehdr *iehdr;
5171 struct elf_segment_map *map;
5172 struct elf_segment_map *map_first;
5173 struct elf_segment_map **pointer_to_map;
5174 Elf_Internal_Phdr *segment;
5177 unsigned int num_segments;
5178 bfd_boolean phdr_included = FALSE;
5179 bfd_vma maxpagesize;
5180 struct elf_segment_map *phdr_adjust_seg = NULL;
5181 unsigned int phdr_adjust_num = 0;
5182 const struct elf_backend_data *bed;
5184 bed = get_elf_backend_data (ibfd);
5185 iehdr = elf_elfheader (ibfd);
5188 pointer_to_map = &map_first;
5190 num_segments = elf_elfheader (ibfd)->e_phnum;
5191 maxpagesize = get_elf_backend_data (obfd)->maxpagesize;
5193 /* Returns the end address of the segment + 1. */
5194 #define SEGMENT_END(segment, start) \
5195 (start + (segment->p_memsz > segment->p_filesz \
5196 ? segment->p_memsz : segment->p_filesz))
5198 #define SECTION_SIZE(section, segment) \
5199 (((section->flags & (SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) \
5200 != SEC_THREAD_LOCAL || segment->p_type == PT_TLS) \
5201 ? section->size : 0)
5203 /* Returns TRUE if the given section is contained within
5204 the given segment. VMA addresses are compared. */
5205 #define IS_CONTAINED_BY_VMA(section, segment) \
5206 (section->vma >= segment->p_vaddr \
5207 && (section->vma + SECTION_SIZE (section, segment) \
5208 <= (SEGMENT_END (segment, segment->p_vaddr))))
5210 /* Returns TRUE if the given section is contained within
5211 the given segment. LMA addresses are compared. */
5212 #define IS_CONTAINED_BY_LMA(section, segment, base) \
5213 (section->lma >= base \
5214 && (section->lma + SECTION_SIZE (section, segment) \
5215 <= SEGMENT_END (segment, base)))
5217 /* Special case: corefile "NOTE" section containing regs, prpsinfo etc. */
5218 #define IS_COREFILE_NOTE(p, s) \
5219 (p->p_type == PT_NOTE \
5220 && bfd_get_format (ibfd) == bfd_core \
5221 && s->vma == 0 && s->lma == 0 \
5222 && (bfd_vma) s->filepos >= p->p_offset \
5223 && ((bfd_vma) s->filepos + s->size \
5224 <= p->p_offset + p->p_filesz))
5226 /* The complicated case when p_vaddr is 0 is to handle the Solaris
5227 linker, which generates a PT_INTERP section with p_vaddr and
5228 p_memsz set to 0. */
5229 #define IS_SOLARIS_PT_INTERP(p, s) \
5231 && p->p_paddr == 0 \
5232 && p->p_memsz == 0 \
5233 && p->p_filesz > 0 \
5234 && (s->flags & SEC_HAS_CONTENTS) != 0 \
5236 && (bfd_vma) s->filepos >= p->p_offset \
5237 && ((bfd_vma) s->filepos + s->size \
5238 <= p->p_offset + p->p_filesz))
5240 /* Decide if the given section should be included in the given segment.
5241 A section will be included if:
5242 1. It is within the address space of the segment -- we use the LMA
5243 if that is set for the segment and the VMA otherwise,
5244 2. It is an allocated segment,
5245 3. There is an output section associated with it,
5246 4. The section has not already been allocated to a previous segment.
5247 5. PT_GNU_STACK segments do not include any sections.
5248 6. PT_TLS segment includes only SHF_TLS sections.
5249 7. SHF_TLS sections are only in PT_TLS or PT_LOAD segments.
5250 8. PT_DYNAMIC should not contain empty sections at the beginning
5251 (with the possible exception of .dynamic). */
5252 #define INCLUDE_SECTION_IN_SEGMENT(section, segment, bed) \
5253 ((((segment->p_paddr \
5254 ? IS_CONTAINED_BY_LMA (section, segment, segment->p_paddr) \
5255 : IS_CONTAINED_BY_VMA (section, segment)) \
5256 && (section->flags & SEC_ALLOC) != 0) \
5257 || IS_COREFILE_NOTE (segment, section)) \
5258 && section->output_section != NULL \
5259 && segment->p_type != PT_GNU_STACK \
5260 && (segment->p_type != PT_TLS \
5261 || (section->flags & SEC_THREAD_LOCAL)) \
5262 && (segment->p_type == PT_LOAD \
5263 || segment->p_type == PT_TLS \
5264 || (section->flags & SEC_THREAD_LOCAL) == 0) \
5265 && (segment->p_type != PT_DYNAMIC \
5266 || SECTION_SIZE (section, segment) > 0 \
5267 || (segment->p_paddr \
5268 ? segment->p_paddr != section->lma \
5269 : segment->p_vaddr != section->vma) \
5270 || (strcmp (bfd_get_section_name (ibfd, section), ".dynamic") \
5272 && ! section->segment_mark)
5274 /* Returns TRUE iff seg1 starts after the end of seg2. */
5275 #define SEGMENT_AFTER_SEGMENT(seg1, seg2, field) \
5276 (seg1->field >= SEGMENT_END (seg2, seg2->field))
5278 /* Returns TRUE iff seg1 and seg2 overlap. Segments overlap iff both
5279 their VMA address ranges and their LMA address ranges overlap.
5280 It is possible to have overlapping VMA ranges without overlapping LMA
5281 ranges. RedBoot images for example can have both .data and .bss mapped
5282 to the same VMA range, but with the .data section mapped to a different
5284 #define SEGMENT_OVERLAPS(seg1, seg2) \
5285 ( !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_vaddr) \
5286 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_vaddr)) \
5287 && !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_paddr) \
5288 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_paddr)))
5290 /* Initialise the segment mark field. */
5291 for (section = ibfd->sections; section != NULL; section = section->next)
5292 section->segment_mark = FALSE;
5294 /* Scan through the segments specified in the program header
5295 of the input BFD. For this first scan we look for overlaps
5296 in the loadable segments. These can be created by weird
5297 parameters to objcopy. Also, fix some solaris weirdness. */
5298 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5303 Elf_Internal_Phdr *segment2;
5305 if (segment->p_type == PT_INTERP)
5306 for (section = ibfd->sections; section; section = section->next)
5307 if (IS_SOLARIS_PT_INTERP (segment, section))
5309 /* Mininal change so that the normal section to segment
5310 assignment code will work. */
5311 segment->p_vaddr = section->vma;
5315 if (segment->p_type != PT_LOAD)
5318 /* Determine if this segment overlaps any previous segments. */
5319 for (j = 0, segment2 = elf_tdata (ibfd)->phdr; j < i; j++, segment2 ++)
5321 bfd_signed_vma extra_length;
5323 if (segment2->p_type != PT_LOAD
5324 || ! SEGMENT_OVERLAPS (segment, segment2))
5327 /* Merge the two segments together. */
5328 if (segment2->p_vaddr < segment->p_vaddr)
5330 /* Extend SEGMENT2 to include SEGMENT and then delete
5333 SEGMENT_END (segment, segment->p_vaddr)
5334 - SEGMENT_END (segment2, segment2->p_vaddr);
5336 if (extra_length > 0)
5338 segment2->p_memsz += extra_length;
5339 segment2->p_filesz += extra_length;
5342 segment->p_type = PT_NULL;
5344 /* Since we have deleted P we must restart the outer loop. */
5346 segment = elf_tdata (ibfd)->phdr;
5351 /* Extend SEGMENT to include SEGMENT2 and then delete
5354 SEGMENT_END (segment2, segment2->p_vaddr)
5355 - SEGMENT_END (segment, segment->p_vaddr);
5357 if (extra_length > 0)
5359 segment->p_memsz += extra_length;
5360 segment->p_filesz += extra_length;
5363 segment2->p_type = PT_NULL;
5368 /* The second scan attempts to assign sections to segments. */
5369 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5373 unsigned int section_count;
5374 asection ** sections;
5375 asection * output_section;
5377 bfd_vma matching_lma;
5378 bfd_vma suggested_lma;
5382 if (segment->p_type == PT_NULL)
5385 /* Compute how many sections might be placed into this segment. */
5386 for (section = ibfd->sections, section_count = 0;
5388 section = section->next)
5389 if (INCLUDE_SECTION_IN_SEGMENT (section, segment, bed))
5392 /* Allocate a segment map big enough to contain
5393 all of the sections we have selected. */
5394 amt = sizeof (struct elf_segment_map);
5395 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
5396 map = bfd_alloc (obfd, amt);
5400 /* Initialise the fields of the segment map. Default to
5401 using the physical address of the segment in the input BFD. */
5403 map->p_type = segment->p_type;
5404 map->p_flags = segment->p_flags;
5405 map->p_flags_valid = 1;
5406 map->p_paddr = segment->p_paddr;
5407 map->p_paddr_valid = 1;
5409 /* Determine if this segment contains the ELF file header
5410 and if it contains the program headers themselves. */
5411 map->includes_filehdr = (segment->p_offset == 0
5412 && segment->p_filesz >= iehdr->e_ehsize);
5414 map->includes_phdrs = 0;
5416 if (! phdr_included || segment->p_type != PT_LOAD)
5418 map->includes_phdrs =
5419 (segment->p_offset <= (bfd_vma) iehdr->e_phoff
5420 && (segment->p_offset + segment->p_filesz
5421 >= ((bfd_vma) iehdr->e_phoff
5422 + iehdr->e_phnum * iehdr->e_phentsize)));
5424 if (segment->p_type == PT_LOAD && map->includes_phdrs)
5425 phdr_included = TRUE;
5428 if (section_count == 0)
5430 /* Special segments, such as the PT_PHDR segment, may contain
5431 no sections, but ordinary, loadable segments should contain
5432 something. They are allowed by the ELF spec however, so only
5433 a warning is produced. */
5434 if (segment->p_type == PT_LOAD)
5435 (*_bfd_error_handler)
5436 (_("%B: warning: Empty loadable segment detected, is this intentional ?\n"),
5440 *pointer_to_map = map;
5441 pointer_to_map = &map->next;
5446 /* Now scan the sections in the input BFD again and attempt
5447 to add their corresponding output sections to the segment map.
5448 The problem here is how to handle an output section which has
5449 been moved (ie had its LMA changed). There are four possibilities:
5451 1. None of the sections have been moved.
5452 In this case we can continue to use the segment LMA from the
5455 2. All of the sections have been moved by the same amount.
5456 In this case we can change the segment's LMA to match the LMA
5457 of the first section.
5459 3. Some of the sections have been moved, others have not.
5460 In this case those sections which have not been moved can be
5461 placed in the current segment which will have to have its size,
5462 and possibly its LMA changed, and a new segment or segments will
5463 have to be created to contain the other sections.
5465 4. The sections have been moved, but not by the same amount.
5466 In this case we can change the segment's LMA to match the LMA
5467 of the first section and we will have to create a new segment
5468 or segments to contain the other sections.
5470 In order to save time, we allocate an array to hold the section
5471 pointers that we are interested in. As these sections get assigned
5472 to a segment, they are removed from this array. */
5474 /* Gcc 2.96 miscompiles this code on mips. Don't do casting here
5475 to work around this long long bug. */
5476 sections = bfd_malloc2 (section_count, sizeof (asection *));
5477 if (sections == NULL)
5480 /* Step One: Scan for segment vs section LMA conflicts.
5481 Also add the sections to the section array allocated above.
5482 Also add the sections to the current segment. In the common
5483 case, where the sections have not been moved, this means that
5484 we have completely filled the segment, and there is nothing
5490 for (j = 0, section = ibfd->sections;
5492 section = section->next)
5494 if (INCLUDE_SECTION_IN_SEGMENT (section, segment, bed))
5496 output_section = section->output_section;
5498 sections[j ++] = section;
5500 /* The Solaris native linker always sets p_paddr to 0.
5501 We try to catch that case here, and set it to the
5502 correct value. Note - some backends require that
5503 p_paddr be left as zero. */
5504 if (segment->p_paddr == 0
5505 && segment->p_vaddr != 0
5506 && (! bed->want_p_paddr_set_to_zero)
5508 && output_section->lma != 0
5509 && (output_section->vma == (segment->p_vaddr
5510 + (map->includes_filehdr
5513 + (map->includes_phdrs
5515 * iehdr->e_phentsize)
5517 map->p_paddr = segment->p_vaddr;
5519 /* Match up the physical address of the segment with the
5520 LMA address of the output section. */
5521 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
5522 || IS_COREFILE_NOTE (segment, section)
5523 || (bed->want_p_paddr_set_to_zero &&
5524 IS_CONTAINED_BY_VMA (output_section, segment))
5527 if (matching_lma == 0)
5528 matching_lma = output_section->lma;
5530 /* We assume that if the section fits within the segment
5531 then it does not overlap any other section within that
5533 map->sections[isec ++] = output_section;
5535 else if (suggested_lma == 0)
5536 suggested_lma = output_section->lma;
5540 BFD_ASSERT (j == section_count);
5542 /* Step Two: Adjust the physical address of the current segment,
5544 if (isec == section_count)
5546 /* All of the sections fitted within the segment as currently
5547 specified. This is the default case. Add the segment to
5548 the list of built segments and carry on to process the next
5549 program header in the input BFD. */
5550 map->count = section_count;
5551 *pointer_to_map = map;
5552 pointer_to_map = &map->next;
5559 if (matching_lma != 0)
5561 /* At least one section fits inside the current segment.
5562 Keep it, but modify its physical address to match the
5563 LMA of the first section that fitted. */
5564 map->p_paddr = matching_lma;
5568 /* None of the sections fitted inside the current segment.
5569 Change the current segment's physical address to match
5570 the LMA of the first section. */
5571 map->p_paddr = suggested_lma;
5574 /* Offset the segment physical address from the lma
5575 to allow for space taken up by elf headers. */
5576 if (map->includes_filehdr)
5577 map->p_paddr -= iehdr->e_ehsize;
5579 if (map->includes_phdrs)
5581 map->p_paddr -= iehdr->e_phnum * iehdr->e_phentsize;
5583 /* iehdr->e_phnum is just an estimate of the number
5584 of program headers that we will need. Make a note
5585 here of the number we used and the segment we chose
5586 to hold these headers, so that we can adjust the
5587 offset when we know the correct value. */
5588 phdr_adjust_num = iehdr->e_phnum;
5589 phdr_adjust_seg = map;
5593 /* Step Three: Loop over the sections again, this time assigning
5594 those that fit to the current segment and removing them from the
5595 sections array; but making sure not to leave large gaps. Once all
5596 possible sections have been assigned to the current segment it is
5597 added to the list of built segments and if sections still remain
5598 to be assigned, a new segment is constructed before repeating
5606 /* Fill the current segment with sections that fit. */
5607 for (j = 0; j < section_count; j++)
5609 section = sections[j];
5611 if (section == NULL)
5614 output_section = section->output_section;
5616 BFD_ASSERT (output_section != NULL);
5618 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
5619 || IS_COREFILE_NOTE (segment, section))
5621 if (map->count == 0)
5623 /* If the first section in a segment does not start at
5624 the beginning of the segment, then something is
5626 if (output_section->lma !=
5628 + (map->includes_filehdr ? iehdr->e_ehsize : 0)
5629 + (map->includes_phdrs
5630 ? iehdr->e_phnum * iehdr->e_phentsize
5636 asection * prev_sec;
5638 prev_sec = map->sections[map->count - 1];
5640 /* If the gap between the end of the previous section
5641 and the start of this section is more than
5642 maxpagesize then we need to start a new segment. */
5643 if ((BFD_ALIGN (prev_sec->lma + prev_sec->size,
5645 < BFD_ALIGN (output_section->lma, maxpagesize))
5646 || ((prev_sec->lma + prev_sec->size)
5647 > output_section->lma))
5649 if (suggested_lma == 0)
5650 suggested_lma = output_section->lma;
5656 map->sections[map->count++] = output_section;
5659 section->segment_mark = TRUE;
5661 else if (suggested_lma == 0)
5662 suggested_lma = output_section->lma;
5665 BFD_ASSERT (map->count > 0);
5667 /* Add the current segment to the list of built segments. */
5668 *pointer_to_map = map;
5669 pointer_to_map = &map->next;
5671 if (isec < section_count)
5673 /* We still have not allocated all of the sections to
5674 segments. Create a new segment here, initialise it
5675 and carry on looping. */
5676 amt = sizeof (struct elf_segment_map);
5677 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
5678 map = bfd_alloc (obfd, amt);
5685 /* Initialise the fields of the segment map. Set the physical
5686 physical address to the LMA of the first section that has
5687 not yet been assigned. */
5689 map->p_type = segment->p_type;
5690 map->p_flags = segment->p_flags;
5691 map->p_flags_valid = 1;
5692 map->p_paddr = suggested_lma;
5693 map->p_paddr_valid = 1;
5694 map->includes_filehdr = 0;
5695 map->includes_phdrs = 0;
5698 while (isec < section_count);
5703 /* The Solaris linker creates program headers in which all the
5704 p_paddr fields are zero. When we try to objcopy or strip such a
5705 file, we get confused. Check for this case, and if we find it
5706 reset the p_paddr_valid fields. */
5707 for (map = map_first; map != NULL; map = map->next)
5708 if (map->p_paddr != 0)
5711 for (map = map_first; map != NULL; map = map->next)
5712 map->p_paddr_valid = 0;
5714 elf_tdata (obfd)->segment_map = map_first;
5716 /* If we had to estimate the number of program headers that were
5717 going to be needed, then check our estimate now and adjust
5718 the offset if necessary. */
5719 if (phdr_adjust_seg != NULL)
5723 for (count = 0, map = map_first; map != NULL; map = map->next)
5726 if (count > phdr_adjust_num)
5727 phdr_adjust_seg->p_paddr
5728 -= (count - phdr_adjust_num) * iehdr->e_phentsize;
5733 #undef IS_CONTAINED_BY_VMA
5734 #undef IS_CONTAINED_BY_LMA
5735 #undef IS_COREFILE_NOTE
5736 #undef IS_SOLARIS_PT_INTERP
5737 #undef INCLUDE_SECTION_IN_SEGMENT
5738 #undef SEGMENT_AFTER_SEGMENT
5739 #undef SEGMENT_OVERLAPS
5743 /* Copy ELF program header information. */
5746 copy_elf_program_header (bfd *ibfd, bfd *obfd)
5748 Elf_Internal_Ehdr *iehdr;
5749 struct elf_segment_map *map;
5750 struct elf_segment_map *map_first;
5751 struct elf_segment_map **pointer_to_map;
5752 Elf_Internal_Phdr *segment;
5754 unsigned int num_segments;
5755 bfd_boolean phdr_included = FALSE;
5757 iehdr = elf_elfheader (ibfd);
5760 pointer_to_map = &map_first;
5762 num_segments = elf_elfheader (ibfd)->e_phnum;
5763 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5768 unsigned int section_count;
5770 Elf_Internal_Shdr *this_hdr;
5772 /* FIXME: Do we need to copy PT_NULL segment? */
5773 if (segment->p_type == PT_NULL)
5776 /* Compute how many sections are in this segment. */
5777 for (section = ibfd->sections, section_count = 0;
5779 section = section->next)
5781 this_hdr = &(elf_section_data(section)->this_hdr);
5782 if (ELF_IS_SECTION_IN_SEGMENT_FILE (this_hdr, segment))
5786 /* Allocate a segment map big enough to contain
5787 all of the sections we have selected. */
5788 amt = sizeof (struct elf_segment_map);
5789 if (section_count != 0)
5790 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
5791 map = bfd_alloc (obfd, amt);
5795 /* Initialize the fields of the output segment map with the
5798 map->p_type = segment->p_type;
5799 map->p_flags = segment->p_flags;
5800 map->p_flags_valid = 1;
5801 map->p_paddr = segment->p_paddr;
5802 map->p_paddr_valid = 1;
5804 /* Determine if this segment contains the ELF file header
5805 and if it contains the program headers themselves. */
5806 map->includes_filehdr = (segment->p_offset == 0
5807 && segment->p_filesz >= iehdr->e_ehsize);
5809 map->includes_phdrs = 0;
5810 if (! phdr_included || segment->p_type != PT_LOAD)
5812 map->includes_phdrs =
5813 (segment->p_offset <= (bfd_vma) iehdr->e_phoff
5814 && (segment->p_offset + segment->p_filesz
5815 >= ((bfd_vma) iehdr->e_phoff
5816 + iehdr->e_phnum * iehdr->e_phentsize)));
5818 if (segment->p_type == PT_LOAD && map->includes_phdrs)
5819 phdr_included = TRUE;
5822 if (section_count != 0)
5824 unsigned int isec = 0;
5826 for (section = ibfd->sections;
5828 section = section->next)
5830 this_hdr = &(elf_section_data(section)->this_hdr);
5831 if (ELF_IS_SECTION_IN_SEGMENT_FILE (this_hdr, segment))
5832 map->sections[isec++] = section->output_section;
5836 map->count = section_count;
5837 *pointer_to_map = map;
5838 pointer_to_map = &map->next;
5841 elf_tdata (obfd)->segment_map = map_first;
5845 /* Copy private BFD data. This copies or rewrites ELF program header
5849 copy_private_bfd_data (bfd *ibfd, bfd *obfd)
5851 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
5852 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
5855 if (elf_tdata (ibfd)->phdr == NULL)
5858 if (ibfd->xvec == obfd->xvec)
5860 /* Check if any sections in the input BFD covered by ELF program
5861 header are changed. */
5862 Elf_Internal_Phdr *segment;
5863 asection *section, *osec;
5864 unsigned int i, num_segments;
5865 Elf_Internal_Shdr *this_hdr;
5867 /* Initialize the segment mark field. */
5868 for (section = obfd->sections; section != NULL;
5869 section = section->next)
5870 section->segment_mark = FALSE;
5872 num_segments = elf_elfheader (ibfd)->e_phnum;
5873 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5877 for (section = ibfd->sections;
5878 section != NULL; section = section->next)
5880 /* We mark the output section so that we know it comes
5881 from the input BFD. */
5882 osec = section->output_section;
5884 osec->segment_mark = TRUE;
5886 /* Check if this section is covered by the segment. */
5887 this_hdr = &(elf_section_data(section)->this_hdr);
5888 if (ELF_IS_SECTION_IN_SEGMENT_FILE (this_hdr, segment))
5890 /* FIXME: Check if its output section is changed or
5891 removed. What else do we need to check? */
5893 || section->flags != osec->flags
5894 || section->lma != osec->lma
5895 || section->vma != osec->vma
5896 || section->size != osec->size
5897 || section->rawsize != osec->rawsize
5898 || section->alignment_power != osec->alignment_power)
5904 /* Check to see if any output section doesn't come from the
5906 for (section = obfd->sections; section != NULL;
5907 section = section->next)
5909 if (section->segment_mark == FALSE)
5912 section->segment_mark = FALSE;
5915 return copy_elf_program_header (ibfd, obfd);
5919 return rewrite_elf_program_header (ibfd, obfd);
5922 /* Initialize private output section information from input section. */
5925 _bfd_elf_init_private_section_data (bfd *ibfd,
5929 struct bfd_link_info *link_info)
5932 Elf_Internal_Shdr *ihdr, *ohdr;
5933 bfd_boolean need_group = link_info == NULL || link_info->relocatable;
5935 if (ibfd->xvec->flavour != bfd_target_elf_flavour
5936 || obfd->xvec->flavour != bfd_target_elf_flavour)
5939 /* Don't copy the output ELF section type from input if the
5940 output BFD section flags has been set to something different.
5941 elf_fake_sections will set ELF section type based on BFD
5943 if (osec->flags == isec->flags
5944 || (osec->flags == 0 && elf_section_type (osec) == SHT_NULL))
5945 elf_section_type (osec) = elf_section_type (isec);
5947 /* Set things up for objcopy and relocatable link. The output
5948 SHT_GROUP section will have its elf_next_in_group pointing back
5949 to the input group members. Ignore linker created group section.
5950 See elfNN_ia64_object_p in elfxx-ia64.c. */
5954 if (elf_sec_group (isec) == NULL
5955 || (elf_sec_group (isec)->flags & SEC_LINKER_CREATED) == 0)
5957 if (elf_section_flags (isec) & SHF_GROUP)
5958 elf_section_flags (osec) |= SHF_GROUP;
5959 elf_next_in_group (osec) = elf_next_in_group (isec);
5960 elf_group_name (osec) = elf_group_name (isec);
5964 ihdr = &elf_section_data (isec)->this_hdr;
5966 /* We need to handle elf_linked_to_section for SHF_LINK_ORDER. We
5967 don't use the output section of the linked-to section since it
5968 may be NULL at this point. */
5969 if ((ihdr->sh_flags & SHF_LINK_ORDER) != 0)
5971 ohdr = &elf_section_data (osec)->this_hdr;
5972 ohdr->sh_flags |= SHF_LINK_ORDER;
5973 elf_linked_to_section (osec) = elf_linked_to_section (isec);
5976 osec->use_rela_p = isec->use_rela_p;
5981 /* Copy private section information. This copies over the entsize
5982 field, and sometimes the info field. */
5985 _bfd_elf_copy_private_section_data (bfd *ibfd,
5990 Elf_Internal_Shdr *ihdr, *ohdr;
5992 if (ibfd->xvec->flavour != bfd_target_elf_flavour
5993 || obfd->xvec->flavour != bfd_target_elf_flavour)
5996 ihdr = &elf_section_data (isec)->this_hdr;
5997 ohdr = &elf_section_data (osec)->this_hdr;
5999 ohdr->sh_entsize = ihdr->sh_entsize;
6001 if (ihdr->sh_type == SHT_SYMTAB
6002 || ihdr->sh_type == SHT_DYNSYM
6003 || ihdr->sh_type == SHT_GNU_verneed
6004 || ihdr->sh_type == SHT_GNU_verdef)
6005 ohdr->sh_info = ihdr->sh_info;
6007 return _bfd_elf_init_private_section_data (ibfd, isec, obfd, osec,
6011 /* Copy private header information. */
6014 _bfd_elf_copy_private_header_data (bfd *ibfd, bfd *obfd)
6016 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
6017 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
6020 /* Copy over private BFD data if it has not already been copied.
6021 This must be done here, rather than in the copy_private_bfd_data
6022 entry point, because the latter is called after the section
6023 contents have been set, which means that the program headers have
6024 already been worked out. */
6025 if (elf_tdata (obfd)->segment_map == NULL && elf_tdata (ibfd)->phdr != NULL)
6027 if (! copy_private_bfd_data (ibfd, obfd))
6034 /* Copy private symbol information. If this symbol is in a section
6035 which we did not map into a BFD section, try to map the section
6036 index correctly. We use special macro definitions for the mapped
6037 section indices; these definitions are interpreted by the
6038 swap_out_syms function. */
6040 #define MAP_ONESYMTAB (SHN_HIOS + 1)
6041 #define MAP_DYNSYMTAB (SHN_HIOS + 2)
6042 #define MAP_STRTAB (SHN_HIOS + 3)
6043 #define MAP_SHSTRTAB (SHN_HIOS + 4)
6044 #define MAP_SYM_SHNDX (SHN_HIOS + 5)
6047 _bfd_elf_copy_private_symbol_data (bfd *ibfd,
6052 elf_symbol_type *isym, *osym;
6054 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
6055 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
6058 isym = elf_symbol_from (ibfd, isymarg);
6059 osym = elf_symbol_from (obfd, osymarg);
6063 && bfd_is_abs_section (isym->symbol.section))
6067 shndx = isym->internal_elf_sym.st_shndx;
6068 if (shndx == elf_onesymtab (ibfd))
6069 shndx = MAP_ONESYMTAB;
6070 else if (shndx == elf_dynsymtab (ibfd))
6071 shndx = MAP_DYNSYMTAB;
6072 else if (shndx == elf_tdata (ibfd)->strtab_section)
6074 else if (shndx == elf_tdata (ibfd)->shstrtab_section)
6075 shndx = MAP_SHSTRTAB;
6076 else if (shndx == elf_tdata (ibfd)->symtab_shndx_section)
6077 shndx = MAP_SYM_SHNDX;
6078 osym->internal_elf_sym.st_shndx = shndx;
6084 /* Swap out the symbols. */
6087 swap_out_syms (bfd *abfd,
6088 struct bfd_strtab_hash **sttp,
6091 const struct elf_backend_data *bed;
6094 struct bfd_strtab_hash *stt;
6095 Elf_Internal_Shdr *symtab_hdr;
6096 Elf_Internal_Shdr *symtab_shndx_hdr;
6097 Elf_Internal_Shdr *symstrtab_hdr;
6098 bfd_byte *outbound_syms;
6099 bfd_byte *outbound_shndx;
6102 bfd_boolean name_local_sections;
6104 if (!elf_map_symbols (abfd))
6107 /* Dump out the symtabs. */
6108 stt = _bfd_elf_stringtab_init ();
6112 bed = get_elf_backend_data (abfd);
6113 symcount = bfd_get_symcount (abfd);
6114 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
6115 symtab_hdr->sh_type = SHT_SYMTAB;
6116 symtab_hdr->sh_entsize = bed->s->sizeof_sym;
6117 symtab_hdr->sh_size = symtab_hdr->sh_entsize * (symcount + 1);
6118 symtab_hdr->sh_info = elf_num_locals (abfd) + 1;
6119 symtab_hdr->sh_addralign = 1 << bed->s->log_file_align;
6121 symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr;
6122 symstrtab_hdr->sh_type = SHT_STRTAB;
6124 outbound_syms = bfd_alloc2 (abfd, 1 + symcount, bed->s->sizeof_sym);
6125 if (outbound_syms == NULL)
6127 _bfd_stringtab_free (stt);
6130 symtab_hdr->contents = outbound_syms;
6132 outbound_shndx = NULL;
6133 symtab_shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
6134 if (symtab_shndx_hdr->sh_name != 0)
6136 amt = (bfd_size_type) (1 + symcount) * sizeof (Elf_External_Sym_Shndx);
6137 outbound_shndx = bfd_zalloc2 (abfd, 1 + symcount,
6138 sizeof (Elf_External_Sym_Shndx));
6139 if (outbound_shndx == NULL)
6141 _bfd_stringtab_free (stt);
6145 symtab_shndx_hdr->contents = outbound_shndx;
6146 symtab_shndx_hdr->sh_type = SHT_SYMTAB_SHNDX;
6147 symtab_shndx_hdr->sh_size = amt;
6148 symtab_shndx_hdr->sh_addralign = sizeof (Elf_External_Sym_Shndx);
6149 symtab_shndx_hdr->sh_entsize = sizeof (Elf_External_Sym_Shndx);
6152 /* Now generate the data (for "contents"). */
6154 /* Fill in zeroth symbol and swap it out. */
6155 Elf_Internal_Sym sym;
6161 sym.st_shndx = SHN_UNDEF;
6162 bed->s->swap_symbol_out (abfd, &sym, outbound_syms, outbound_shndx);
6163 outbound_syms += bed->s->sizeof_sym;
6164 if (outbound_shndx != NULL)
6165 outbound_shndx += sizeof (Elf_External_Sym_Shndx);
6169 = (bed->elf_backend_name_local_section_symbols
6170 && bed->elf_backend_name_local_section_symbols (abfd));
6172 syms = bfd_get_outsymbols (abfd);
6173 for (idx = 0; idx < symcount; idx++)
6175 Elf_Internal_Sym sym;
6176 bfd_vma value = syms[idx]->value;
6177 elf_symbol_type *type_ptr;
6178 flagword flags = syms[idx]->flags;
6181 if (!name_local_sections
6182 && (flags & (BSF_SECTION_SYM | BSF_GLOBAL)) == BSF_SECTION_SYM)
6184 /* Local section symbols have no name. */
6189 sym.st_name = (unsigned long) _bfd_stringtab_add (stt,
6192 if (sym.st_name == (unsigned long) -1)
6194 _bfd_stringtab_free (stt);
6199 type_ptr = elf_symbol_from (abfd, syms[idx]);
6201 if ((flags & BSF_SECTION_SYM) == 0
6202 && bfd_is_com_section (syms[idx]->section))
6204 /* ELF common symbols put the alignment into the `value' field,
6205 and the size into the `size' field. This is backwards from
6206 how BFD handles it, so reverse it here. */
6207 sym.st_size = value;
6208 if (type_ptr == NULL
6209 || type_ptr->internal_elf_sym.st_value == 0)
6210 sym.st_value = value >= 16 ? 16 : (1 << bfd_log2 (value));
6212 sym.st_value = type_ptr->internal_elf_sym.st_value;
6213 sym.st_shndx = _bfd_elf_section_from_bfd_section
6214 (abfd, syms[idx]->section);
6218 asection *sec = syms[idx]->section;
6221 if (sec->output_section)
6223 value += sec->output_offset;
6224 sec = sec->output_section;
6227 /* Don't add in the section vma for relocatable output. */
6228 if (! relocatable_p)
6230 sym.st_value = value;
6231 sym.st_size = type_ptr ? type_ptr->internal_elf_sym.st_size : 0;
6233 if (bfd_is_abs_section (sec)
6235 && type_ptr->internal_elf_sym.st_shndx != 0)
6237 /* This symbol is in a real ELF section which we did
6238 not create as a BFD section. Undo the mapping done
6239 by copy_private_symbol_data. */
6240 shndx = type_ptr->internal_elf_sym.st_shndx;
6244 shndx = elf_onesymtab (abfd);
6247 shndx = elf_dynsymtab (abfd);
6250 shndx = elf_tdata (abfd)->strtab_section;
6253 shndx = elf_tdata (abfd)->shstrtab_section;
6256 shndx = elf_tdata (abfd)->symtab_shndx_section;
6264 shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
6270 /* Writing this would be a hell of a lot easier if
6271 we had some decent documentation on bfd, and
6272 knew what to expect of the library, and what to
6273 demand of applications. For example, it
6274 appears that `objcopy' might not set the
6275 section of a symbol to be a section that is
6276 actually in the output file. */
6277 sec2 = bfd_get_section_by_name (abfd, sec->name);
6280 _bfd_error_handler (_("\
6281 Unable to find equivalent output section for symbol '%s' from section '%s'"),
6282 syms[idx]->name ? syms[idx]->name : "<Local sym>",
6284 bfd_set_error (bfd_error_invalid_operation);
6285 _bfd_stringtab_free (stt);
6289 shndx = _bfd_elf_section_from_bfd_section (abfd, sec2);
6290 BFD_ASSERT (shndx != -1);
6294 sym.st_shndx = shndx;
6297 if ((flags & BSF_THREAD_LOCAL) != 0)
6299 else if ((flags & BSF_FUNCTION) != 0)
6301 else if ((flags & BSF_OBJECT) != 0)
6306 if (syms[idx]->section->flags & SEC_THREAD_LOCAL)
6309 /* Processor-specific types. */
6310 if (type_ptr != NULL
6311 && bed->elf_backend_get_symbol_type)
6312 type = ((*bed->elf_backend_get_symbol_type)
6313 (&type_ptr->internal_elf_sym, type));
6315 if (flags & BSF_SECTION_SYM)
6317 if (flags & BSF_GLOBAL)
6318 sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION);
6320 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
6322 else if (bfd_is_com_section (syms[idx]->section))
6323 sym.st_info = ELF_ST_INFO (STB_GLOBAL, type);
6324 else if (bfd_is_und_section (syms[idx]->section))
6325 sym.st_info = ELF_ST_INFO (((flags & BSF_WEAK)
6329 else if (flags & BSF_FILE)
6330 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE);
6333 int bind = STB_LOCAL;
6335 if (flags & BSF_LOCAL)
6337 else if (flags & BSF_WEAK)
6339 else if (flags & BSF_GLOBAL)
6342 sym.st_info = ELF_ST_INFO (bind, type);
6345 if (type_ptr != NULL)
6346 sym.st_other = type_ptr->internal_elf_sym.st_other;
6350 bed->s->swap_symbol_out (abfd, &sym, outbound_syms, outbound_shndx);
6351 outbound_syms += bed->s->sizeof_sym;
6352 if (outbound_shndx != NULL)
6353 outbound_shndx += sizeof (Elf_External_Sym_Shndx);
6357 symstrtab_hdr->sh_size = _bfd_stringtab_size (stt);
6358 symstrtab_hdr->sh_type = SHT_STRTAB;
6360 symstrtab_hdr->sh_flags = 0;
6361 symstrtab_hdr->sh_addr = 0;
6362 symstrtab_hdr->sh_entsize = 0;
6363 symstrtab_hdr->sh_link = 0;
6364 symstrtab_hdr->sh_info = 0;
6365 symstrtab_hdr->sh_addralign = 1;
6370 /* Return the number of bytes required to hold the symtab vector.
6372 Note that we base it on the count plus 1, since we will null terminate
6373 the vector allocated based on this size. However, the ELF symbol table
6374 always has a dummy entry as symbol #0, so it ends up even. */
6377 _bfd_elf_get_symtab_upper_bound (bfd *abfd)
6381 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->symtab_hdr;
6383 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
6384 symtab_size = (symcount + 1) * (sizeof (asymbol *));
6386 symtab_size -= sizeof (asymbol *);
6392 _bfd_elf_get_dynamic_symtab_upper_bound (bfd *abfd)
6396 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->dynsymtab_hdr;
6398 if (elf_dynsymtab (abfd) == 0)
6400 bfd_set_error (bfd_error_invalid_operation);
6404 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
6405 symtab_size = (symcount + 1) * (sizeof (asymbol *));
6407 symtab_size -= sizeof (asymbol *);
6413 _bfd_elf_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED,
6416 return (asect->reloc_count + 1) * sizeof (arelent *);
6419 /* Canonicalize the relocs. */
6422 _bfd_elf_canonicalize_reloc (bfd *abfd,
6429 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6431 if (! bed->s->slurp_reloc_table (abfd, section, symbols, FALSE))
6434 tblptr = section->relocation;
6435 for (i = 0; i < section->reloc_count; i++)
6436 *relptr++ = tblptr++;
6440 return section->reloc_count;
6444 _bfd_elf_canonicalize_symtab (bfd *abfd, asymbol **allocation)
6446 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6447 long symcount = bed->s->slurp_symbol_table (abfd, allocation, FALSE);
6450 bfd_get_symcount (abfd) = symcount;
6455 _bfd_elf_canonicalize_dynamic_symtab (bfd *abfd,
6456 asymbol **allocation)
6458 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6459 long symcount = bed->s->slurp_symbol_table (abfd, allocation, TRUE);
6462 bfd_get_dynamic_symcount (abfd) = symcount;
6466 /* Return the size required for the dynamic reloc entries. Any loadable
6467 section that was actually installed in the BFD, and has type SHT_REL
6468 or SHT_RELA, and uses the dynamic symbol table, is considered to be a
6469 dynamic reloc section. */
6472 _bfd_elf_get_dynamic_reloc_upper_bound (bfd *abfd)
6477 if (elf_dynsymtab (abfd) == 0)
6479 bfd_set_error (bfd_error_invalid_operation);
6483 ret = sizeof (arelent *);
6484 for (s = abfd->sections; s != NULL; s = s->next)
6485 if ((s->flags & SEC_LOAD) != 0
6486 && elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
6487 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
6488 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
6489 ret += ((s->size / elf_section_data (s)->this_hdr.sh_entsize)
6490 * sizeof (arelent *));
6495 /* Canonicalize the dynamic relocation entries. Note that we return the
6496 dynamic relocations as a single block, although they are actually
6497 associated with particular sections; the interface, which was
6498 designed for SunOS style shared libraries, expects that there is only
6499 one set of dynamic relocs. Any loadable section that was actually
6500 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses the
6501 dynamic symbol table, is considered to be a dynamic reloc section. */
6504 _bfd_elf_canonicalize_dynamic_reloc (bfd *abfd,
6508 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
6512 if (elf_dynsymtab (abfd) == 0)
6514 bfd_set_error (bfd_error_invalid_operation);
6518 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
6520 for (s = abfd->sections; s != NULL; s = s->next)
6522 if ((s->flags & SEC_LOAD) != 0
6523 && elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
6524 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
6525 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
6530 if (! (*slurp_relocs) (abfd, s, syms, TRUE))
6532 count = s->size / elf_section_data (s)->this_hdr.sh_entsize;
6534 for (i = 0; i < count; i++)
6545 /* Read in the version information. */
6548 _bfd_elf_slurp_version_tables (bfd *abfd, bfd_boolean default_imported_symver)
6550 bfd_byte *contents = NULL;
6551 unsigned int freeidx = 0;
6553 if (elf_dynverref (abfd) != 0)
6555 Elf_Internal_Shdr *hdr;
6556 Elf_External_Verneed *everneed;
6557 Elf_Internal_Verneed *iverneed;
6559 bfd_byte *contents_end;
6561 hdr = &elf_tdata (abfd)->dynverref_hdr;
6563 elf_tdata (abfd)->verref = bfd_zalloc2 (abfd, hdr->sh_info,
6564 sizeof (Elf_Internal_Verneed));
6565 if (elf_tdata (abfd)->verref == NULL)
6568 elf_tdata (abfd)->cverrefs = hdr->sh_info;
6570 contents = bfd_malloc (hdr->sh_size);
6571 if (contents == NULL)
6573 error_return_verref:
6574 elf_tdata (abfd)->verref = NULL;
6575 elf_tdata (abfd)->cverrefs = 0;
6578 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
6579 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size)
6580 goto error_return_verref;
6582 if (hdr->sh_info && hdr->sh_size < sizeof (Elf_External_Verneed))
6583 goto error_return_verref;
6585 BFD_ASSERT (sizeof (Elf_External_Verneed)
6586 == sizeof (Elf_External_Vernaux));
6587 contents_end = contents + hdr->sh_size - sizeof (Elf_External_Verneed);
6588 everneed = (Elf_External_Verneed *) contents;
6589 iverneed = elf_tdata (abfd)->verref;
6590 for (i = 0; i < hdr->sh_info; i++, iverneed++)
6592 Elf_External_Vernaux *evernaux;
6593 Elf_Internal_Vernaux *ivernaux;
6596 _bfd_elf_swap_verneed_in (abfd, everneed, iverneed);
6598 iverneed->vn_bfd = abfd;
6600 iverneed->vn_filename =
6601 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
6603 if (iverneed->vn_filename == NULL)
6604 goto error_return_verref;
6606 if (iverneed->vn_cnt == 0)
6607 iverneed->vn_auxptr = NULL;
6610 iverneed->vn_auxptr = bfd_alloc2 (abfd, iverneed->vn_cnt,
6611 sizeof (Elf_Internal_Vernaux));
6612 if (iverneed->vn_auxptr == NULL)
6613 goto error_return_verref;
6616 if (iverneed->vn_aux
6617 > (size_t) (contents_end - (bfd_byte *) everneed))
6618 goto error_return_verref;
6620 evernaux = ((Elf_External_Vernaux *)
6621 ((bfd_byte *) everneed + iverneed->vn_aux));
6622 ivernaux = iverneed->vn_auxptr;
6623 for (j = 0; j < iverneed->vn_cnt; j++, ivernaux++)
6625 _bfd_elf_swap_vernaux_in (abfd, evernaux, ivernaux);
6627 ivernaux->vna_nodename =
6628 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
6629 ivernaux->vna_name);
6630 if (ivernaux->vna_nodename == NULL)
6631 goto error_return_verref;
6633 if (j + 1 < iverneed->vn_cnt)
6634 ivernaux->vna_nextptr = ivernaux + 1;
6636 ivernaux->vna_nextptr = NULL;
6638 if (ivernaux->vna_next
6639 > (size_t) (contents_end - (bfd_byte *) evernaux))
6640 goto error_return_verref;
6642 evernaux = ((Elf_External_Vernaux *)
6643 ((bfd_byte *) evernaux + ivernaux->vna_next));
6645 if (ivernaux->vna_other > freeidx)
6646 freeidx = ivernaux->vna_other;
6649 if (i + 1 < hdr->sh_info)
6650 iverneed->vn_nextref = iverneed + 1;
6652 iverneed->vn_nextref = NULL;
6654 if (iverneed->vn_next
6655 > (size_t) (contents_end - (bfd_byte *) everneed))
6656 goto error_return_verref;
6658 everneed = ((Elf_External_Verneed *)
6659 ((bfd_byte *) everneed + iverneed->vn_next));
6666 if (elf_dynverdef (abfd) != 0)
6668 Elf_Internal_Shdr *hdr;
6669 Elf_External_Verdef *everdef;
6670 Elf_Internal_Verdef *iverdef;
6671 Elf_Internal_Verdef *iverdefarr;
6672 Elf_Internal_Verdef iverdefmem;
6674 unsigned int maxidx;
6675 bfd_byte *contents_end_def, *contents_end_aux;
6677 hdr = &elf_tdata (abfd)->dynverdef_hdr;
6679 contents = bfd_malloc (hdr->sh_size);
6680 if (contents == NULL)
6682 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
6683 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size)
6686 if (hdr->sh_info && hdr->sh_size < sizeof (Elf_External_Verdef))
6689 BFD_ASSERT (sizeof (Elf_External_Verdef)
6690 >= sizeof (Elf_External_Verdaux));
6691 contents_end_def = contents + hdr->sh_size
6692 - sizeof (Elf_External_Verdef);
6693 contents_end_aux = contents + hdr->sh_size
6694 - sizeof (Elf_External_Verdaux);
6696 /* We know the number of entries in the section but not the maximum
6697 index. Therefore we have to run through all entries and find
6699 everdef = (Elf_External_Verdef *) contents;
6701 for (i = 0; i < hdr->sh_info; ++i)
6703 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
6705 if ((iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION)) > maxidx)
6706 maxidx = iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION);
6708 if (iverdefmem.vd_next
6709 > (size_t) (contents_end_def - (bfd_byte *) everdef))
6712 everdef = ((Elf_External_Verdef *)
6713 ((bfd_byte *) everdef + iverdefmem.vd_next));
6716 if (default_imported_symver)
6718 if (freeidx > maxidx)
6723 elf_tdata (abfd)->verdef = bfd_zalloc2 (abfd, maxidx,
6724 sizeof (Elf_Internal_Verdef));
6725 if (elf_tdata (abfd)->verdef == NULL)
6728 elf_tdata (abfd)->cverdefs = maxidx;
6730 everdef = (Elf_External_Verdef *) contents;
6731 iverdefarr = elf_tdata (abfd)->verdef;
6732 for (i = 0; i < hdr->sh_info; i++)
6734 Elf_External_Verdaux *everdaux;
6735 Elf_Internal_Verdaux *iverdaux;
6738 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
6740 if ((iverdefmem.vd_ndx & VERSYM_VERSION) == 0)
6742 error_return_verdef:
6743 elf_tdata (abfd)->verdef = NULL;
6744 elf_tdata (abfd)->cverdefs = 0;
6748 iverdef = &iverdefarr[(iverdefmem.vd_ndx & VERSYM_VERSION) - 1];
6749 memcpy (iverdef, &iverdefmem, sizeof (Elf_Internal_Verdef));
6751 iverdef->vd_bfd = abfd;
6753 if (iverdef->vd_cnt == 0)
6754 iverdef->vd_auxptr = NULL;
6757 iverdef->vd_auxptr = bfd_alloc2 (abfd, iverdef->vd_cnt,
6758 sizeof (Elf_Internal_Verdaux));
6759 if (iverdef->vd_auxptr == NULL)
6760 goto error_return_verdef;
6764 > (size_t) (contents_end_aux - (bfd_byte *) everdef))
6765 goto error_return_verdef;
6767 everdaux = ((Elf_External_Verdaux *)
6768 ((bfd_byte *) everdef + iverdef->vd_aux));
6769 iverdaux = iverdef->vd_auxptr;
6770 for (j = 0; j < iverdef->vd_cnt; j++, iverdaux++)
6772 _bfd_elf_swap_verdaux_in (abfd, everdaux, iverdaux);
6774 iverdaux->vda_nodename =
6775 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
6776 iverdaux->vda_name);
6777 if (iverdaux->vda_nodename == NULL)
6778 goto error_return_verdef;
6780 if (j + 1 < iverdef->vd_cnt)
6781 iverdaux->vda_nextptr = iverdaux + 1;
6783 iverdaux->vda_nextptr = NULL;
6785 if (iverdaux->vda_next
6786 > (size_t) (contents_end_aux - (bfd_byte *) everdaux))
6787 goto error_return_verdef;
6789 everdaux = ((Elf_External_Verdaux *)
6790 ((bfd_byte *) everdaux + iverdaux->vda_next));
6793 if (iverdef->vd_cnt)
6794 iverdef->vd_nodename = iverdef->vd_auxptr->vda_nodename;
6796 if ((size_t) (iverdef - iverdefarr) + 1 < maxidx)
6797 iverdef->vd_nextdef = iverdef + 1;
6799 iverdef->vd_nextdef = NULL;
6801 everdef = ((Elf_External_Verdef *)
6802 ((bfd_byte *) everdef + iverdef->vd_next));
6808 else if (default_imported_symver)
6815 elf_tdata (abfd)->verdef = bfd_zalloc2 (abfd, freeidx,
6816 sizeof (Elf_Internal_Verdef));
6817 if (elf_tdata (abfd)->verdef == NULL)
6820 elf_tdata (abfd)->cverdefs = freeidx;
6823 /* Create a default version based on the soname. */
6824 if (default_imported_symver)
6826 Elf_Internal_Verdef *iverdef;
6827 Elf_Internal_Verdaux *iverdaux;
6829 iverdef = &elf_tdata (abfd)->verdef[freeidx - 1];;
6831 iverdef->vd_version = VER_DEF_CURRENT;
6832 iverdef->vd_flags = 0;
6833 iverdef->vd_ndx = freeidx;
6834 iverdef->vd_cnt = 1;
6836 iverdef->vd_bfd = abfd;
6838 iverdef->vd_nodename = bfd_elf_get_dt_soname (abfd);
6839 if (iverdef->vd_nodename == NULL)
6840 goto error_return_verdef;
6841 iverdef->vd_nextdef = NULL;
6842 iverdef->vd_auxptr = bfd_alloc (abfd, sizeof (Elf_Internal_Verdaux));
6843 if (iverdef->vd_auxptr == NULL)
6844 goto error_return_verdef;
6846 iverdaux = iverdef->vd_auxptr;
6847 iverdaux->vda_nodename = iverdef->vd_nodename;
6848 iverdaux->vda_nextptr = NULL;
6854 if (contents != NULL)
6860 _bfd_elf_make_empty_symbol (bfd *abfd)
6862 elf_symbol_type *newsym;
6863 bfd_size_type amt = sizeof (elf_symbol_type);
6865 newsym = bfd_zalloc (abfd, amt);
6870 newsym->symbol.the_bfd = abfd;
6871 return &newsym->symbol;
6876 _bfd_elf_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED,
6880 bfd_symbol_info (symbol, ret);
6883 /* Return whether a symbol name implies a local symbol. Most targets
6884 use this function for the is_local_label_name entry point, but some
6888 _bfd_elf_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED,
6891 /* Normal local symbols start with ``.L''. */
6892 if (name[0] == '.' && name[1] == 'L')
6895 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
6896 DWARF debugging symbols starting with ``..''. */
6897 if (name[0] == '.' && name[1] == '.')
6900 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
6901 emitting DWARF debugging output. I suspect this is actually a
6902 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
6903 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
6904 underscore to be emitted on some ELF targets). For ease of use,
6905 we treat such symbols as local. */
6906 if (name[0] == '_' && name[1] == '.' && name[2] == 'L' && name[3] == '_')
6913 _bfd_elf_get_lineno (bfd *abfd ATTRIBUTE_UNUSED,
6914 asymbol *symbol ATTRIBUTE_UNUSED)
6921 _bfd_elf_set_arch_mach (bfd *abfd,
6922 enum bfd_architecture arch,
6923 unsigned long machine)
6925 /* If this isn't the right architecture for this backend, and this
6926 isn't the generic backend, fail. */
6927 if (arch != get_elf_backend_data (abfd)->arch
6928 && arch != bfd_arch_unknown
6929 && get_elf_backend_data (abfd)->arch != bfd_arch_unknown)
6932 return bfd_default_set_arch_mach (abfd, arch, machine);
6935 /* Find the function to a particular section and offset,
6936 for error reporting. */
6939 elf_find_function (bfd *abfd ATTRIBUTE_UNUSED,
6943 const char **filename_ptr,
6944 const char **functionname_ptr)
6946 const char *filename;
6947 asymbol *func, *file;
6950 /* ??? Given multiple file symbols, it is impossible to reliably
6951 choose the right file name for global symbols. File symbols are
6952 local symbols, and thus all file symbols must sort before any
6953 global symbols. The ELF spec may be interpreted to say that a
6954 file symbol must sort before other local symbols, but currently
6955 ld -r doesn't do this. So, for ld -r output, it is possible to
6956 make a better choice of file name for local symbols by ignoring
6957 file symbols appearing after a given local symbol. */
6958 enum { nothing_seen, symbol_seen, file_after_symbol_seen } state;
6964 state = nothing_seen;
6966 for (p = symbols; *p != NULL; p++)
6970 q = (elf_symbol_type *) *p;
6972 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
6978 if (state == symbol_seen)
6979 state = file_after_symbol_seen;
6983 if (bfd_get_section (&q->symbol) == section
6984 && q->symbol.value >= low_func
6985 && q->symbol.value <= offset)
6987 func = (asymbol *) q;
6988 low_func = q->symbol.value;
6991 && (ELF_ST_BIND (q->internal_elf_sym.st_info) == STB_LOCAL
6992 || state != file_after_symbol_seen))
6993 filename = bfd_asymbol_name (file);
6997 if (state == nothing_seen)
6998 state = symbol_seen;
7005 *filename_ptr = filename;
7006 if (functionname_ptr)
7007 *functionname_ptr = bfd_asymbol_name (func);
7012 /* Find the nearest line to a particular section and offset,
7013 for error reporting. */
7016 _bfd_elf_find_nearest_line (bfd *abfd,
7020 const char **filename_ptr,
7021 const char **functionname_ptr,
7022 unsigned int *line_ptr)
7026 if (_bfd_dwarf1_find_nearest_line (abfd, section, symbols, offset,
7027 filename_ptr, functionname_ptr,
7030 if (!*functionname_ptr)
7031 elf_find_function (abfd, section, symbols, offset,
7032 *filename_ptr ? NULL : filename_ptr,
7038 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
7039 filename_ptr, functionname_ptr,
7041 &elf_tdata (abfd)->dwarf2_find_line_info))
7043 if (!*functionname_ptr)
7044 elf_find_function (abfd, section, symbols, offset,
7045 *filename_ptr ? NULL : filename_ptr,
7051 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
7052 &found, filename_ptr,
7053 functionname_ptr, line_ptr,
7054 &elf_tdata (abfd)->line_info))
7056 if (found && (*functionname_ptr || *line_ptr))
7059 if (symbols == NULL)
7062 if (! elf_find_function (abfd, section, symbols, offset,
7063 filename_ptr, functionname_ptr))
7070 /* Find the line for a symbol. */
7073 _bfd_elf_find_line (bfd *abfd, asymbol **symbols, asymbol *symbol,
7074 const char **filename_ptr, unsigned int *line_ptr)
7076 return _bfd_dwarf2_find_line (abfd, symbols, symbol,
7077 filename_ptr, line_ptr, 0,
7078 &elf_tdata (abfd)->dwarf2_find_line_info);
7081 /* After a call to bfd_find_nearest_line, successive calls to
7082 bfd_find_inliner_info can be used to get source information about
7083 each level of function inlining that terminated at the address
7084 passed to bfd_find_nearest_line. Currently this is only supported
7085 for DWARF2 with appropriate DWARF3 extensions. */
7088 _bfd_elf_find_inliner_info (bfd *abfd,
7089 const char **filename_ptr,
7090 const char **functionname_ptr,
7091 unsigned int *line_ptr)
7094 found = _bfd_dwarf2_find_inliner_info (abfd, filename_ptr,
7095 functionname_ptr, line_ptr,
7096 & elf_tdata (abfd)->dwarf2_find_line_info);
7101 _bfd_elf_sizeof_headers (bfd *abfd, bfd_boolean reloc)
7105 ret = get_elf_backend_data (abfd)->s->sizeof_ehdr;
7107 ret += get_program_header_size (abfd);
7112 _bfd_elf_set_section_contents (bfd *abfd,
7114 const void *location,
7116 bfd_size_type count)
7118 Elf_Internal_Shdr *hdr;
7121 if (! abfd->output_has_begun
7122 && ! _bfd_elf_compute_section_file_positions (abfd, NULL))
7125 hdr = &elf_section_data (section)->this_hdr;
7126 pos = hdr->sh_offset + offset;
7127 if (bfd_seek (abfd, pos, SEEK_SET) != 0
7128 || bfd_bwrite (location, count, abfd) != count)
7135 _bfd_elf_no_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
7136 arelent *cache_ptr ATTRIBUTE_UNUSED,
7137 Elf_Internal_Rela *dst ATTRIBUTE_UNUSED)
7142 /* Try to convert a non-ELF reloc into an ELF one. */
7145 _bfd_elf_validate_reloc (bfd *abfd, arelent *areloc)
7147 /* Check whether we really have an ELF howto. */
7149 if ((*areloc->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec)
7151 bfd_reloc_code_real_type code;
7152 reloc_howto_type *howto;
7154 /* Alien reloc: Try to determine its type to replace it with an
7155 equivalent ELF reloc. */
7157 if (areloc->howto->pc_relative)
7159 switch (areloc->howto->bitsize)
7162 code = BFD_RELOC_8_PCREL;
7165 code = BFD_RELOC_12_PCREL;
7168 code = BFD_RELOC_16_PCREL;
7171 code = BFD_RELOC_24_PCREL;
7174 code = BFD_RELOC_32_PCREL;
7177 code = BFD_RELOC_64_PCREL;
7183 howto = bfd_reloc_type_lookup (abfd, code);
7185 if (areloc->howto->pcrel_offset != howto->pcrel_offset)
7187 if (howto->pcrel_offset)
7188 areloc->addend += areloc->address;
7190 areloc->addend -= areloc->address; /* addend is unsigned!! */
7195 switch (areloc->howto->bitsize)
7201 code = BFD_RELOC_14;
7204 code = BFD_RELOC_16;
7207 code = BFD_RELOC_26;
7210 code = BFD_RELOC_32;
7213 code = BFD_RELOC_64;
7219 howto = bfd_reloc_type_lookup (abfd, code);
7223 areloc->howto = howto;
7231 (*_bfd_error_handler)
7232 (_("%B: unsupported relocation type %s"),
7233 abfd, areloc->howto->name);
7234 bfd_set_error (bfd_error_bad_value);
7239 _bfd_elf_close_and_cleanup (bfd *abfd)
7241 if (bfd_get_format (abfd) == bfd_object)
7243 if (elf_tdata (abfd) != NULL && elf_shstrtab (abfd) != NULL)
7244 _bfd_elf_strtab_free (elf_shstrtab (abfd));
7245 _bfd_dwarf2_cleanup_debug_info (abfd);
7248 return _bfd_generic_close_and_cleanup (abfd);
7251 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
7252 in the relocation's offset. Thus we cannot allow any sort of sanity
7253 range-checking to interfere. There is nothing else to do in processing
7256 bfd_reloc_status_type
7257 _bfd_elf_rel_vtable_reloc_fn
7258 (bfd *abfd ATTRIBUTE_UNUSED, arelent *re ATTRIBUTE_UNUSED,
7259 struct bfd_symbol *symbol ATTRIBUTE_UNUSED,
7260 void *data ATTRIBUTE_UNUSED, asection *is ATTRIBUTE_UNUSED,
7261 bfd *obfd ATTRIBUTE_UNUSED, char **errmsg ATTRIBUTE_UNUSED)
7263 return bfd_reloc_ok;
7266 /* Elf core file support. Much of this only works on native
7267 toolchains, since we rely on knowing the
7268 machine-dependent procfs structure in order to pick
7269 out details about the corefile. */
7271 #ifdef HAVE_SYS_PROCFS_H
7272 # include <sys/procfs.h>
7275 /* FIXME: this is kinda wrong, but it's what gdb wants. */
7278 elfcore_make_pid (bfd *abfd)
7280 return ((elf_tdata (abfd)->core_lwpid << 16)
7281 + (elf_tdata (abfd)->core_pid));
7284 /* If there isn't a section called NAME, make one, using
7285 data from SECT. Note, this function will generate a
7286 reference to NAME, so you shouldn't deallocate or
7290 elfcore_maybe_make_sect (bfd *abfd, char *name, asection *sect)
7294 if (bfd_get_section_by_name (abfd, name) != NULL)
7297 sect2 = bfd_make_section (abfd, name);
7301 sect2->size = sect->size;
7302 sect2->filepos = sect->filepos;
7303 sect2->flags = sect->flags;
7304 sect2->alignment_power = sect->alignment_power;
7308 /* Create a pseudosection containing SIZE bytes at FILEPOS. This
7309 actually creates up to two pseudosections:
7310 - For the single-threaded case, a section named NAME, unless
7311 such a section already exists.
7312 - For the multi-threaded case, a section named "NAME/PID", where
7313 PID is elfcore_make_pid (abfd).
7314 Both pseudosections have identical contents. */
7316 _bfd_elfcore_make_pseudosection (bfd *abfd,
7322 char *threaded_name;
7326 /* Build the section name. */
7328 sprintf (buf, "%s/%d", name, elfcore_make_pid (abfd));
7329 len = strlen (buf) + 1;
7330 threaded_name = bfd_alloc (abfd, len);
7331 if (threaded_name == NULL)
7333 memcpy (threaded_name, buf, len);
7335 sect = bfd_make_section_anyway (abfd, threaded_name);
7339 sect->filepos = filepos;
7340 sect->flags = SEC_HAS_CONTENTS;
7341 sect->alignment_power = 2;
7343 return elfcore_maybe_make_sect (abfd, name, sect);
7346 /* prstatus_t exists on:
7348 linux 2.[01] + glibc
7352 #if defined (HAVE_PRSTATUS_T)
7355 elfcore_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
7360 if (note->descsz == sizeof (prstatus_t))
7364 size = sizeof (prstat.pr_reg);
7365 offset = offsetof (prstatus_t, pr_reg);
7366 memcpy (&prstat, note->descdata, sizeof (prstat));
7368 /* Do not overwrite the core signal if it
7369 has already been set by another thread. */
7370 if (elf_tdata (abfd)->core_signal == 0)
7371 elf_tdata (abfd)->core_signal = prstat.pr_cursig;
7372 elf_tdata (abfd)->core_pid = prstat.pr_pid;
7374 /* pr_who exists on:
7377 pr_who doesn't exist on:
7380 #if defined (HAVE_PRSTATUS_T_PR_WHO)
7381 elf_tdata (abfd)->core_lwpid = prstat.pr_who;
7384 #if defined (HAVE_PRSTATUS32_T)
7385 else if (note->descsz == sizeof (prstatus32_t))
7387 /* 64-bit host, 32-bit corefile */
7388 prstatus32_t prstat;
7390 size = sizeof (prstat.pr_reg);
7391 offset = offsetof (prstatus32_t, pr_reg);
7392 memcpy (&prstat, note->descdata, sizeof (prstat));
7394 /* Do not overwrite the core signal if it
7395 has already been set by another thread. */
7396 if (elf_tdata (abfd)->core_signal == 0)
7397 elf_tdata (abfd)->core_signal = prstat.pr_cursig;
7398 elf_tdata (abfd)->core_pid = prstat.pr_pid;
7400 /* pr_who exists on:
7403 pr_who doesn't exist on:
7406 #if defined (HAVE_PRSTATUS32_T_PR_WHO)
7407 elf_tdata (abfd)->core_lwpid = prstat.pr_who;
7410 #endif /* HAVE_PRSTATUS32_T */
7413 /* Fail - we don't know how to handle any other
7414 note size (ie. data object type). */
7418 /* Make a ".reg/999" section and a ".reg" section. */
7419 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
7420 size, note->descpos + offset);
7422 #endif /* defined (HAVE_PRSTATUS_T) */
7424 /* Create a pseudosection containing the exact contents of NOTE. */
7426 elfcore_make_note_pseudosection (bfd *abfd,
7428 Elf_Internal_Note *note)
7430 return _bfd_elfcore_make_pseudosection (abfd, name,
7431 note->descsz, note->descpos);
7434 /* There isn't a consistent prfpregset_t across platforms,
7435 but it doesn't matter, because we don't have to pick this
7436 data structure apart. */
7439 elfcore_grok_prfpreg (bfd *abfd, Elf_Internal_Note *note)
7441 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
7444 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
7445 type of 5 (NT_PRXFPREG). Just include the whole note's contents
7449 elfcore_grok_prxfpreg (bfd *abfd, Elf_Internal_Note *note)
7451 return elfcore_make_note_pseudosection (abfd, ".reg-xfp", note);
7454 #if defined (HAVE_PRPSINFO_T)
7455 typedef prpsinfo_t elfcore_psinfo_t;
7456 #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
7457 typedef prpsinfo32_t elfcore_psinfo32_t;
7461 #if defined (HAVE_PSINFO_T)
7462 typedef psinfo_t elfcore_psinfo_t;
7463 #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
7464 typedef psinfo32_t elfcore_psinfo32_t;
7468 /* return a malloc'ed copy of a string at START which is at
7469 most MAX bytes long, possibly without a terminating '\0'.
7470 the copy will always have a terminating '\0'. */
7473 _bfd_elfcore_strndup (bfd *abfd, char *start, size_t max)
7476 char *end = memchr (start, '\0', max);
7484 dups = bfd_alloc (abfd, len + 1);
7488 memcpy (dups, start, len);
7494 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7496 elfcore_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
7498 if (note->descsz == sizeof (elfcore_psinfo_t))
7500 elfcore_psinfo_t psinfo;
7502 memcpy (&psinfo, note->descdata, sizeof (psinfo));
7504 elf_tdata (abfd)->core_program
7505 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
7506 sizeof (psinfo.pr_fname));
7508 elf_tdata (abfd)->core_command
7509 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
7510 sizeof (psinfo.pr_psargs));
7512 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
7513 else if (note->descsz == sizeof (elfcore_psinfo32_t))
7515 /* 64-bit host, 32-bit corefile */
7516 elfcore_psinfo32_t psinfo;
7518 memcpy (&psinfo, note->descdata, sizeof (psinfo));
7520 elf_tdata (abfd)->core_program
7521 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
7522 sizeof (psinfo.pr_fname));
7524 elf_tdata (abfd)->core_command
7525 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
7526 sizeof (psinfo.pr_psargs));
7532 /* Fail - we don't know how to handle any other
7533 note size (ie. data object type). */
7537 /* Note that for some reason, a spurious space is tacked
7538 onto the end of the args in some (at least one anyway)
7539 implementations, so strip it off if it exists. */
7542 char *command = elf_tdata (abfd)->core_command;
7543 int n = strlen (command);
7545 if (0 < n && command[n - 1] == ' ')
7546 command[n - 1] = '\0';
7551 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
7553 #if defined (HAVE_PSTATUS_T)
7555 elfcore_grok_pstatus (bfd *abfd, Elf_Internal_Note *note)
7557 if (note->descsz == sizeof (pstatus_t)
7558 #if defined (HAVE_PXSTATUS_T)
7559 || note->descsz == sizeof (pxstatus_t)
7565 memcpy (&pstat, note->descdata, sizeof (pstat));
7567 elf_tdata (abfd)->core_pid = pstat.pr_pid;
7569 #if defined (HAVE_PSTATUS32_T)
7570 else if (note->descsz == sizeof (pstatus32_t))
7572 /* 64-bit host, 32-bit corefile */
7575 memcpy (&pstat, note->descdata, sizeof (pstat));
7577 elf_tdata (abfd)->core_pid = pstat.pr_pid;
7580 /* Could grab some more details from the "representative"
7581 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
7582 NT_LWPSTATUS note, presumably. */
7586 #endif /* defined (HAVE_PSTATUS_T) */
7588 #if defined (HAVE_LWPSTATUS_T)
7590 elfcore_grok_lwpstatus (bfd *abfd, Elf_Internal_Note *note)
7592 lwpstatus_t lwpstat;
7598 if (note->descsz != sizeof (lwpstat)
7599 #if defined (HAVE_LWPXSTATUS_T)
7600 && note->descsz != sizeof (lwpxstatus_t)
7605 memcpy (&lwpstat, note->descdata, sizeof (lwpstat));
7607 elf_tdata (abfd)->core_lwpid = lwpstat.pr_lwpid;
7608 elf_tdata (abfd)->core_signal = lwpstat.pr_cursig;
7610 /* Make a ".reg/999" section. */
7612 sprintf (buf, ".reg/%d", elfcore_make_pid (abfd));
7613 len = strlen (buf) + 1;
7614 name = bfd_alloc (abfd, len);
7617 memcpy (name, buf, len);
7619 sect = bfd_make_section_anyway (abfd, name);
7623 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7624 sect->size = sizeof (lwpstat.pr_context.uc_mcontext.gregs);
7625 sect->filepos = note->descpos
7626 + offsetof (lwpstatus_t, pr_context.uc_mcontext.gregs);
7629 #if defined (HAVE_LWPSTATUS_T_PR_REG)
7630 sect->size = sizeof (lwpstat.pr_reg);
7631 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_reg);
7634 sect->flags = SEC_HAS_CONTENTS;
7635 sect->alignment_power = 2;
7637 if (!elfcore_maybe_make_sect (abfd, ".reg", sect))
7640 /* Make a ".reg2/999" section */
7642 sprintf (buf, ".reg2/%d", elfcore_make_pid (abfd));
7643 len = strlen (buf) + 1;
7644 name = bfd_alloc (abfd, len);
7647 memcpy (name, buf, len);
7649 sect = bfd_make_section_anyway (abfd, name);
7653 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7654 sect->size = sizeof (lwpstat.pr_context.uc_mcontext.fpregs);
7655 sect->filepos = note->descpos
7656 + offsetof (lwpstatus_t, pr_context.uc_mcontext.fpregs);
7659 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
7660 sect->size = sizeof (lwpstat.pr_fpreg);
7661 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_fpreg);
7664 sect->flags = SEC_HAS_CONTENTS;
7665 sect->alignment_power = 2;
7667 return elfcore_maybe_make_sect (abfd, ".reg2", sect);
7669 #endif /* defined (HAVE_LWPSTATUS_T) */
7671 #if defined (HAVE_WIN32_PSTATUS_T)
7673 elfcore_grok_win32pstatus (bfd *abfd, Elf_Internal_Note *note)
7679 win32_pstatus_t pstatus;
7681 if (note->descsz < sizeof (pstatus))
7684 memcpy (&pstatus, note->descdata, sizeof (pstatus));
7686 switch (pstatus.data_type)
7688 case NOTE_INFO_PROCESS:
7689 /* FIXME: need to add ->core_command. */
7690 elf_tdata (abfd)->core_signal = pstatus.data.process_info.signal;
7691 elf_tdata (abfd)->core_pid = pstatus.data.process_info.pid;
7694 case NOTE_INFO_THREAD:
7695 /* Make a ".reg/999" section. */
7696 sprintf (buf, ".reg/%ld", (long) pstatus.data.thread_info.tid);
7698 len = strlen (buf) + 1;
7699 name = bfd_alloc (abfd, len);
7703 memcpy (name, buf, len);
7705 sect = bfd_make_section_anyway (abfd, name);
7709 sect->size = sizeof (pstatus.data.thread_info.thread_context);
7710 sect->filepos = (note->descpos
7711 + offsetof (struct win32_pstatus,
7712 data.thread_info.thread_context));
7713 sect->flags = SEC_HAS_CONTENTS;
7714 sect->alignment_power = 2;
7716 if (pstatus.data.thread_info.is_active_thread)
7717 if (! elfcore_maybe_make_sect (abfd, ".reg", sect))
7721 case NOTE_INFO_MODULE:
7722 /* Make a ".module/xxxxxxxx" section. */
7723 sprintf (buf, ".module/%08lx",
7724 (long) pstatus.data.module_info.base_address);
7726 len = strlen (buf) + 1;
7727 name = bfd_alloc (abfd, len);
7731 memcpy (name, buf, len);
7733 sect = bfd_make_section_anyway (abfd, name);
7738 sect->size = note->descsz;
7739 sect->filepos = note->descpos;
7740 sect->flags = SEC_HAS_CONTENTS;
7741 sect->alignment_power = 2;
7750 #endif /* HAVE_WIN32_PSTATUS_T */
7753 elfcore_grok_note (bfd *abfd, Elf_Internal_Note *note)
7755 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
7763 if (bed->elf_backend_grok_prstatus)
7764 if ((*bed->elf_backend_grok_prstatus) (abfd, note))
7766 #if defined (HAVE_PRSTATUS_T)
7767 return elfcore_grok_prstatus (abfd, note);
7772 #if defined (HAVE_PSTATUS_T)
7774 return elfcore_grok_pstatus (abfd, note);
7777 #if defined (HAVE_LWPSTATUS_T)
7779 return elfcore_grok_lwpstatus (abfd, note);
7782 case NT_FPREGSET: /* FIXME: rename to NT_PRFPREG */
7783 return elfcore_grok_prfpreg (abfd, note);
7785 #if defined (HAVE_WIN32_PSTATUS_T)
7786 case NT_WIN32PSTATUS:
7787 return elfcore_grok_win32pstatus (abfd, note);
7790 case NT_PRXFPREG: /* Linux SSE extension */
7791 if (note->namesz == 6
7792 && strcmp (note->namedata, "LINUX") == 0)
7793 return elfcore_grok_prxfpreg (abfd, note);
7799 if (bed->elf_backend_grok_psinfo)
7800 if ((*bed->elf_backend_grok_psinfo) (abfd, note))
7802 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7803 return elfcore_grok_psinfo (abfd, note);
7810 asection *sect = bfd_make_section_anyway (abfd, ".auxv");
7814 sect->size = note->descsz;
7815 sect->filepos = note->descpos;
7816 sect->flags = SEC_HAS_CONTENTS;
7817 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32;
7825 elfcore_netbsd_get_lwpid (Elf_Internal_Note *note, int *lwpidp)
7829 cp = strchr (note->namedata, '@');
7832 *lwpidp = atoi(cp + 1);
7839 elfcore_grok_netbsd_procinfo (bfd *abfd, Elf_Internal_Note *note)
7842 /* Signal number at offset 0x08. */
7843 elf_tdata (abfd)->core_signal
7844 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x08);
7846 /* Process ID at offset 0x50. */
7847 elf_tdata (abfd)->core_pid
7848 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x50);
7850 /* Command name at 0x7c (max 32 bytes, including nul). */
7851 elf_tdata (abfd)->core_command
7852 = _bfd_elfcore_strndup (abfd, note->descdata + 0x7c, 31);
7854 return elfcore_make_note_pseudosection (abfd, ".note.netbsdcore.procinfo",
7859 elfcore_grok_netbsd_note (bfd *abfd, Elf_Internal_Note *note)
7863 if (elfcore_netbsd_get_lwpid (note, &lwp))
7864 elf_tdata (abfd)->core_lwpid = lwp;
7866 if (note->type == NT_NETBSDCORE_PROCINFO)
7868 /* NetBSD-specific core "procinfo". Note that we expect to
7869 find this note before any of the others, which is fine,
7870 since the kernel writes this note out first when it
7871 creates a core file. */
7873 return elfcore_grok_netbsd_procinfo (abfd, note);
7876 /* As of Jan 2002 there are no other machine-independent notes
7877 defined for NetBSD core files. If the note type is less
7878 than the start of the machine-dependent note types, we don't
7881 if (note->type < NT_NETBSDCORE_FIRSTMACH)
7885 switch (bfd_get_arch (abfd))
7887 /* On the Alpha, SPARC (32-bit and 64-bit), PT_GETREGS == mach+0 and
7888 PT_GETFPREGS == mach+2. */
7890 case bfd_arch_alpha:
7891 case bfd_arch_sparc:
7894 case NT_NETBSDCORE_FIRSTMACH+0:
7895 return elfcore_make_note_pseudosection (abfd, ".reg", note);
7897 case NT_NETBSDCORE_FIRSTMACH+2:
7898 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
7904 /* On all other arch's, PT_GETREGS == mach+1 and
7905 PT_GETFPREGS == mach+3. */
7910 case NT_NETBSDCORE_FIRSTMACH+1:
7911 return elfcore_make_note_pseudosection (abfd, ".reg", note);
7913 case NT_NETBSDCORE_FIRSTMACH+3:
7914 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
7924 elfcore_grok_nto_status (bfd *abfd, Elf_Internal_Note *note, pid_t *tid)
7926 void *ddata = note->descdata;
7933 /* nto_procfs_status 'pid' field is at offset 0. */
7934 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, (bfd_byte *) ddata);
7936 /* nto_procfs_status 'tid' field is at offset 4. Pass it back. */
7937 *tid = bfd_get_32 (abfd, (bfd_byte *) ddata + 4);
7939 /* nto_procfs_status 'flags' field is at offset 8. */
7940 flags = bfd_get_32 (abfd, (bfd_byte *) ddata + 8);
7942 /* nto_procfs_status 'what' field is at offset 14. */
7943 if ((sig = bfd_get_16 (abfd, (bfd_byte *) ddata + 14)) > 0)
7945 elf_tdata (abfd)->core_signal = sig;
7946 elf_tdata (abfd)->core_lwpid = *tid;
7949 /* _DEBUG_FLAG_CURTID (current thread) is 0x80. Some cores
7950 do not come from signals so we make sure we set the current
7951 thread just in case. */
7952 if (flags & 0x00000080)
7953 elf_tdata (abfd)->core_lwpid = *tid;
7955 /* Make a ".qnx_core_status/%d" section. */
7956 sprintf (buf, ".qnx_core_status/%ld", (long) *tid);
7958 name = bfd_alloc (abfd, strlen (buf) + 1);
7963 sect = bfd_make_section_anyway (abfd, name);
7967 sect->size = note->descsz;
7968 sect->filepos = note->descpos;
7969 sect->flags = SEC_HAS_CONTENTS;
7970 sect->alignment_power = 2;
7972 return (elfcore_maybe_make_sect (abfd, ".qnx_core_status", sect));
7976 elfcore_grok_nto_regs (bfd *abfd,
7977 Elf_Internal_Note *note,
7985 /* Make a "(base)/%d" section. */
7986 sprintf (buf, "%s/%ld", base, (long) tid);
7988 name = bfd_alloc (abfd, strlen (buf) + 1);
7993 sect = bfd_make_section_anyway (abfd, name);
7997 sect->size = note->descsz;
7998 sect->filepos = note->descpos;
7999 sect->flags = SEC_HAS_CONTENTS;
8000 sect->alignment_power = 2;
8002 /* This is the current thread. */
8003 if (elf_tdata (abfd)->core_lwpid == tid)
8004 return elfcore_maybe_make_sect (abfd, base, sect);
8009 #define BFD_QNT_CORE_INFO 7
8010 #define BFD_QNT_CORE_STATUS 8
8011 #define BFD_QNT_CORE_GREG 9
8012 #define BFD_QNT_CORE_FPREG 10
8015 elfcore_grok_nto_note (bfd *abfd, Elf_Internal_Note *note)
8017 /* Every GREG section has a STATUS section before it. Store the
8018 tid from the previous call to pass down to the next gregs
8020 static pid_t tid = 1;
8024 case BFD_QNT_CORE_INFO:
8025 return elfcore_make_note_pseudosection (abfd, ".qnx_core_info", note);
8026 case BFD_QNT_CORE_STATUS:
8027 return elfcore_grok_nto_status (abfd, note, &tid);
8028 case BFD_QNT_CORE_GREG:
8029 return elfcore_grok_nto_regs (abfd, note, tid, ".reg");
8030 case BFD_QNT_CORE_FPREG:
8031 return elfcore_grok_nto_regs (abfd, note, tid, ".reg2");
8037 /* Function: elfcore_write_note
8044 size of data for note
8047 End of buffer containing note. */
8050 elfcore_write_note (bfd *abfd,
8058 Elf_External_Note *xnp;
8068 const struct elf_backend_data *bed;
8070 namesz = strlen (name) + 1;
8071 bed = get_elf_backend_data (abfd);
8072 pad = -namesz & ((1 << bed->s->log_file_align) - 1);
8075 newspace = 12 + namesz + pad + size;
8077 p = realloc (buf, *bufsiz + newspace);
8079 *bufsiz += newspace;
8080 xnp = (Elf_External_Note *) dest;
8081 H_PUT_32 (abfd, namesz, xnp->namesz);
8082 H_PUT_32 (abfd, size, xnp->descsz);
8083 H_PUT_32 (abfd, type, xnp->type);
8087 memcpy (dest, name, namesz);
8095 memcpy (dest, input, size);
8099 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
8101 elfcore_write_prpsinfo (bfd *abfd,
8108 char *note_name = "CORE";
8110 #if defined (HAVE_PSINFO_T)
8112 note_type = NT_PSINFO;
8115 note_type = NT_PRPSINFO;
8118 memset (&data, 0, sizeof (data));
8119 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
8120 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
8121 return elfcore_write_note (abfd, buf, bufsiz,
8122 note_name, note_type, &data, sizeof (data));
8124 #endif /* PSINFO_T or PRPSINFO_T */
8126 #if defined (HAVE_PRSTATUS_T)
8128 elfcore_write_prstatus (bfd *abfd,
8136 char *note_name = "CORE";
8138 memset (&prstat, 0, sizeof (prstat));
8139 prstat.pr_pid = pid;
8140 prstat.pr_cursig = cursig;
8141 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
8142 return elfcore_write_note (abfd, buf, bufsiz,
8143 note_name, NT_PRSTATUS, &prstat, sizeof (prstat));
8145 #endif /* HAVE_PRSTATUS_T */
8147 #if defined (HAVE_LWPSTATUS_T)
8149 elfcore_write_lwpstatus (bfd *abfd,
8156 lwpstatus_t lwpstat;
8157 char *note_name = "CORE";
8159 memset (&lwpstat, 0, sizeof (lwpstat));
8160 lwpstat.pr_lwpid = pid >> 16;
8161 lwpstat.pr_cursig = cursig;
8162 #if defined (HAVE_LWPSTATUS_T_PR_REG)
8163 memcpy (lwpstat.pr_reg, gregs, sizeof (lwpstat.pr_reg));
8164 #elif defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
8166 memcpy (lwpstat.pr_context.uc_mcontext.gregs,
8167 gregs, sizeof (lwpstat.pr_context.uc_mcontext.gregs));
8169 memcpy (lwpstat.pr_context.uc_mcontext.__gregs,
8170 gregs, sizeof (lwpstat.pr_context.uc_mcontext.__gregs));
8173 return elfcore_write_note (abfd, buf, bufsiz, note_name,
8174 NT_LWPSTATUS, &lwpstat, sizeof (lwpstat));
8176 #endif /* HAVE_LWPSTATUS_T */
8178 #if defined (HAVE_PSTATUS_T)
8180 elfcore_write_pstatus (bfd *abfd,
8184 int cursig ATTRIBUTE_UNUSED,
8185 const void *gregs ATTRIBUTE_UNUSED)
8188 char *note_name = "CORE";
8190 memset (&pstat, 0, sizeof (pstat));
8191 pstat.pr_pid = pid & 0xffff;
8192 buf = elfcore_write_note (abfd, buf, bufsiz, note_name,
8193 NT_PSTATUS, &pstat, sizeof (pstat));
8196 #endif /* HAVE_PSTATUS_T */
8199 elfcore_write_prfpreg (bfd *abfd,
8205 char *note_name = "CORE";
8206 return elfcore_write_note (abfd, buf, bufsiz,
8207 note_name, NT_FPREGSET, fpregs, size);
8211 elfcore_write_prxfpreg (bfd *abfd,
8214 const void *xfpregs,
8217 char *note_name = "LINUX";
8218 return elfcore_write_note (abfd, buf, bufsiz,
8219 note_name, NT_PRXFPREG, xfpregs, size);
8223 elfcore_read_notes (bfd *abfd, file_ptr offset, bfd_size_type size)
8231 if (bfd_seek (abfd, offset, SEEK_SET) != 0)
8234 buf = bfd_malloc (size);
8238 if (bfd_bread (buf, size, abfd) != size)
8246 while (p < buf + size)
8248 /* FIXME: bad alignment assumption. */
8249 Elf_External_Note *xnp = (Elf_External_Note *) p;
8250 Elf_Internal_Note in;
8252 in.type = H_GET_32 (abfd, xnp->type);
8254 in.namesz = H_GET_32 (abfd, xnp->namesz);
8255 in.namedata = xnp->name;
8257 in.descsz = H_GET_32 (abfd, xnp->descsz);
8258 in.descdata = in.namedata + BFD_ALIGN (in.namesz, 4);
8259 in.descpos = offset + (in.descdata - buf);
8261 if (strncmp (in.namedata, "NetBSD-CORE", 11) == 0)
8263 if (! elfcore_grok_netbsd_note (abfd, &in))
8266 else if (strncmp (in.namedata, "QNX", 3) == 0)
8268 if (! elfcore_grok_nto_note (abfd, &in))
8273 if (! elfcore_grok_note (abfd, &in))
8277 p = in.descdata + BFD_ALIGN (in.descsz, 4);
8284 /* Providing external access to the ELF program header table. */
8286 /* Return an upper bound on the number of bytes required to store a
8287 copy of ABFD's program header table entries. Return -1 if an error
8288 occurs; bfd_get_error will return an appropriate code. */
8291 bfd_get_elf_phdr_upper_bound (bfd *abfd)
8293 if (abfd->xvec->flavour != bfd_target_elf_flavour)
8295 bfd_set_error (bfd_error_wrong_format);
8299 return elf_elfheader (abfd)->e_phnum * sizeof (Elf_Internal_Phdr);
8302 /* Copy ABFD's program header table entries to *PHDRS. The entries
8303 will be stored as an array of Elf_Internal_Phdr structures, as
8304 defined in include/elf/internal.h. To find out how large the
8305 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
8307 Return the number of program header table entries read, or -1 if an
8308 error occurs; bfd_get_error will return an appropriate code. */
8311 bfd_get_elf_phdrs (bfd *abfd, void *phdrs)
8315 if (abfd->xvec->flavour != bfd_target_elf_flavour)
8317 bfd_set_error (bfd_error_wrong_format);
8321 num_phdrs = elf_elfheader (abfd)->e_phnum;
8322 memcpy (phdrs, elf_tdata (abfd)->phdr,
8323 num_phdrs * sizeof (Elf_Internal_Phdr));
8329 _bfd_elf_sprintf_vma (bfd *abfd ATTRIBUTE_UNUSED, char *buf, bfd_vma value)
8332 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
8334 i_ehdrp = elf_elfheader (abfd);
8335 if (i_ehdrp == NULL)
8336 sprintf_vma (buf, value);
8339 if (i_ehdrp->e_ident[EI_CLASS] == ELFCLASS64)
8341 #if BFD_HOST_64BIT_LONG
8342 sprintf (buf, "%016lx", value);
8344 sprintf (buf, "%08lx%08lx", _bfd_int64_high (value),
8345 _bfd_int64_low (value));
8349 sprintf (buf, "%08lx", (unsigned long) (value & 0xffffffff));
8352 sprintf_vma (buf, value);
8357 _bfd_elf_fprintf_vma (bfd *abfd ATTRIBUTE_UNUSED, void *stream, bfd_vma value)
8360 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
8362 i_ehdrp = elf_elfheader (abfd);
8363 if (i_ehdrp == NULL)
8364 fprintf_vma ((FILE *) stream, value);
8367 if (i_ehdrp->e_ident[EI_CLASS] == ELFCLASS64)
8369 #if BFD_HOST_64BIT_LONG
8370 fprintf ((FILE *) stream, "%016lx", value);
8372 fprintf ((FILE *) stream, "%08lx%08lx",
8373 _bfd_int64_high (value), _bfd_int64_low (value));
8377 fprintf ((FILE *) stream, "%08lx",
8378 (unsigned long) (value & 0xffffffff));
8381 fprintf_vma ((FILE *) stream, value);
8385 enum elf_reloc_type_class
8386 _bfd_elf_reloc_type_class (const Elf_Internal_Rela *rela ATTRIBUTE_UNUSED)
8388 return reloc_class_normal;
8391 /* For RELA architectures, return the relocation value for a
8392 relocation against a local symbol. */
8395 _bfd_elf_rela_local_sym (bfd *abfd,
8396 Elf_Internal_Sym *sym,
8398 Elf_Internal_Rela *rel)
8400 asection *sec = *psec;
8403 relocation = (sec->output_section->vma
8404 + sec->output_offset
8406 if ((sec->flags & SEC_MERGE)
8407 && ELF_ST_TYPE (sym->st_info) == STT_SECTION
8408 && sec->sec_info_type == ELF_INFO_TYPE_MERGE)
8411 _bfd_merged_section_offset (abfd, psec,
8412 elf_section_data (sec)->sec_info,
8413 sym->st_value + rel->r_addend);
8416 /* If we have changed the section, and our original section is
8417 marked with SEC_EXCLUDE, it means that the original
8418 SEC_MERGE section has been completely subsumed in some
8419 other SEC_MERGE section. In this case, we need to leave
8420 some info around for --emit-relocs. */
8421 if ((sec->flags & SEC_EXCLUDE) != 0)
8422 sec->kept_section = *psec;
8425 rel->r_addend -= relocation;
8426 rel->r_addend += sec->output_section->vma + sec->output_offset;
8432 _bfd_elf_rel_local_sym (bfd *abfd,
8433 Elf_Internal_Sym *sym,
8437 asection *sec = *psec;
8439 if (sec->sec_info_type != ELF_INFO_TYPE_MERGE)
8440 return sym->st_value + addend;
8442 return _bfd_merged_section_offset (abfd, psec,
8443 elf_section_data (sec)->sec_info,
8444 sym->st_value + addend);
8448 _bfd_elf_section_offset (bfd *abfd,
8449 struct bfd_link_info *info,
8453 switch (sec->sec_info_type)
8455 case ELF_INFO_TYPE_STABS:
8456 return _bfd_stab_section_offset (sec, elf_section_data (sec)->sec_info,
8458 case ELF_INFO_TYPE_EH_FRAME:
8459 return _bfd_elf_eh_frame_section_offset (abfd, info, sec, offset);
8465 /* Create a new BFD as if by bfd_openr. Rather than opening a file,
8466 reconstruct an ELF file by reading the segments out of remote memory
8467 based on the ELF file header at EHDR_VMA and the ELF program headers it
8468 points to. If not null, *LOADBASEP is filled in with the difference
8469 between the VMAs from which the segments were read, and the VMAs the
8470 file headers (and hence BFD's idea of each section's VMA) put them at.
8472 The function TARGET_READ_MEMORY is called to copy LEN bytes from the
8473 remote memory at target address VMA into the local buffer at MYADDR; it
8474 should return zero on success or an `errno' code on failure. TEMPL must
8475 be a BFD for an ELF target with the word size and byte order found in
8476 the remote memory. */
8479 bfd_elf_bfd_from_remote_memory
8483 int (*target_read_memory) (bfd_vma, bfd_byte *, int))
8485 return (*get_elf_backend_data (templ)->elf_backend_bfd_from_remote_memory)
8486 (templ, ehdr_vma, loadbasep, target_read_memory);
8490 _bfd_elf_get_synthetic_symtab (bfd *abfd,
8491 long symcount ATTRIBUTE_UNUSED,
8492 asymbol **syms ATTRIBUTE_UNUSED,
8497 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8500 const char *relplt_name;
8501 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
8505 Elf_Internal_Shdr *hdr;
8511 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
8514 if (dynsymcount <= 0)
8517 if (!bed->plt_sym_val)
8520 relplt_name = bed->relplt_name;
8521 if (relplt_name == NULL)
8522 relplt_name = bed->default_use_rela_p ? ".rela.plt" : ".rel.plt";
8523 relplt = bfd_get_section_by_name (abfd, relplt_name);
8527 hdr = &elf_section_data (relplt)->this_hdr;
8528 if (hdr->sh_link != elf_dynsymtab (abfd)
8529 || (hdr->sh_type != SHT_REL && hdr->sh_type != SHT_RELA))
8532 plt = bfd_get_section_by_name (abfd, ".plt");
8536 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
8537 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
8540 count = relplt->size / hdr->sh_entsize;
8541 size = count * sizeof (asymbol);
8542 p = relplt->relocation;
8543 for (i = 0; i < count; i++, s++, p++)
8544 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
8546 s = *ret = bfd_malloc (size);
8550 names = (char *) (s + count);
8551 p = relplt->relocation;
8553 for (i = 0; i < count; i++, s++, p++)
8558 addr = bed->plt_sym_val (i, plt, p);
8559 if (addr == (bfd_vma) -1)
8562 *s = **p->sym_ptr_ptr;
8563 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
8564 we are defining a symbol, ensure one of them is set. */
8565 if ((s->flags & BSF_LOCAL) == 0)
8566 s->flags |= BSF_GLOBAL;
8568 s->value = addr - plt->vma;
8570 len = strlen ((*p->sym_ptr_ptr)->name);
8571 memcpy (names, (*p->sym_ptr_ptr)->name, len);
8573 memcpy (names, "@plt", sizeof ("@plt"));
8574 names += sizeof ("@plt");
8581 /* Sort symbol by binding and section. We want to put definitions
8582 sorted by section at the beginning. */
8585 elf_sort_elf_symbol (const void *arg1, const void *arg2)
8587 const Elf_Internal_Sym *s1;
8588 const Elf_Internal_Sym *s2;
8591 /* Make sure that undefined symbols are at the end. */
8592 s1 = (const Elf_Internal_Sym *) arg1;
8593 if (s1->st_shndx == SHN_UNDEF)
8595 s2 = (const Elf_Internal_Sym *) arg2;
8596 if (s2->st_shndx == SHN_UNDEF)
8599 /* Sorted by section index. */
8600 shndx = s1->st_shndx - s2->st_shndx;
8604 /* Sorted by binding. */
8605 return ELF_ST_BIND (s1->st_info) - ELF_ST_BIND (s2->st_info);
8610 Elf_Internal_Sym *sym;
8615 elf_sym_name_compare (const void *arg1, const void *arg2)
8617 const struct elf_symbol *s1 = (const struct elf_symbol *) arg1;
8618 const struct elf_symbol *s2 = (const struct elf_symbol *) arg2;
8619 return strcmp (s1->name, s2->name);
8622 /* Check if 2 sections define the same set of local and global
8626 bfd_elf_match_symbols_in_sections (asection *sec1, asection *sec2)
8629 const struct elf_backend_data *bed1, *bed2;
8630 Elf_Internal_Shdr *hdr1, *hdr2;
8631 bfd_size_type symcount1, symcount2;
8632 Elf_Internal_Sym *isymbuf1, *isymbuf2;
8633 Elf_Internal_Sym *isymstart1 = NULL, *isymstart2 = NULL, *isym;
8634 Elf_Internal_Sym *isymend;
8635 struct elf_symbol *symp, *symtable1 = NULL, *symtable2 = NULL;
8636 bfd_size_type count1, count2, i;
8643 /* If both are .gnu.linkonce sections, they have to have the same
8645 if (strncmp (sec1->name, ".gnu.linkonce",
8646 sizeof ".gnu.linkonce" - 1) == 0
8647 && strncmp (sec2->name, ".gnu.linkonce",
8648 sizeof ".gnu.linkonce" - 1) == 0)
8649 return strcmp (sec1->name + sizeof ".gnu.linkonce",
8650 sec2->name + sizeof ".gnu.linkonce") == 0;
8652 /* Both sections have to be in ELF. */
8653 if (bfd_get_flavour (bfd1) != bfd_target_elf_flavour
8654 || bfd_get_flavour (bfd2) != bfd_target_elf_flavour)
8657 if (elf_section_type (sec1) != elf_section_type (sec2))
8660 if ((elf_section_flags (sec1) & SHF_GROUP) != 0
8661 && (elf_section_flags (sec2) & SHF_GROUP) != 0)
8663 /* If both are members of section groups, they have to have the
8665 if (strcmp (elf_group_name (sec1), elf_group_name (sec2)) != 0)
8669 shndx1 = _bfd_elf_section_from_bfd_section (bfd1, sec1);
8670 shndx2 = _bfd_elf_section_from_bfd_section (bfd2, sec2);
8671 if (shndx1 == -1 || shndx2 == -1)
8674 bed1 = get_elf_backend_data (bfd1);
8675 bed2 = get_elf_backend_data (bfd2);
8676 hdr1 = &elf_tdata (bfd1)->symtab_hdr;
8677 symcount1 = hdr1->sh_size / bed1->s->sizeof_sym;
8678 hdr2 = &elf_tdata (bfd2)->symtab_hdr;
8679 symcount2 = hdr2->sh_size / bed2->s->sizeof_sym;
8681 if (symcount1 == 0 || symcount2 == 0)
8684 isymbuf1 = bfd_elf_get_elf_syms (bfd1, hdr1, symcount1, 0,
8686 isymbuf2 = bfd_elf_get_elf_syms (bfd2, hdr2, symcount2, 0,
8690 if (isymbuf1 == NULL || isymbuf2 == NULL)
8693 /* Sort symbols by binding and section. Global definitions are at
8695 qsort (isymbuf1, symcount1, sizeof (Elf_Internal_Sym),
8696 elf_sort_elf_symbol);
8697 qsort (isymbuf2, symcount2, sizeof (Elf_Internal_Sym),
8698 elf_sort_elf_symbol);
8700 /* Count definitions in the section. */
8702 for (isym = isymbuf1, isymend = isym + symcount1;
8703 isym < isymend; isym++)
8705 if (isym->st_shndx == (unsigned int) shndx1)
8712 if (count1 && isym->st_shndx != (unsigned int) shndx1)
8717 for (isym = isymbuf2, isymend = isym + symcount2;
8718 isym < isymend; isym++)
8720 if (isym->st_shndx == (unsigned int) shndx2)
8727 if (count2 && isym->st_shndx != (unsigned int) shndx2)
8731 if (count1 == 0 || count2 == 0 || count1 != count2)
8734 symtable1 = bfd_malloc (count1 * sizeof (struct elf_symbol));
8735 symtable2 = bfd_malloc (count1 * sizeof (struct elf_symbol));
8737 if (symtable1 == NULL || symtable2 == NULL)
8741 for (isym = isymstart1, isymend = isym + count1;
8742 isym < isymend; isym++)
8745 symp->name = bfd_elf_string_from_elf_section (bfd1,
8752 for (isym = isymstart2, isymend = isym + count1;
8753 isym < isymend; isym++)
8756 symp->name = bfd_elf_string_from_elf_section (bfd2,
8762 /* Sort symbol by name. */
8763 qsort (symtable1, count1, sizeof (struct elf_symbol),
8764 elf_sym_name_compare);
8765 qsort (symtable2, count1, sizeof (struct elf_symbol),
8766 elf_sym_name_compare);
8768 for (i = 0; i < count1; i++)
8769 /* Two symbols must have the same binding, type and name. */
8770 if (symtable1 [i].sym->st_info != symtable2 [i].sym->st_info
8771 || symtable1 [i].sym->st_other != symtable2 [i].sym->st_other
8772 || strcmp (symtable1 [i].name, symtable2 [i].name) != 0)
8790 /* It is only used by x86-64 so far. */
8791 asection _bfd_elf_large_com_section
8792 = BFD_FAKE_SECTION (_bfd_elf_large_com_section,
8793 SEC_IS_COMMON, NULL, "LARGE_COMMON", 0);
8795 /* Return TRUE if 2 section types are compatible. */
8798 _bfd_elf_match_sections_by_type (bfd *abfd, const asection *asec,
8799 bfd *bbfd, const asection *bsec)
8803 || abfd->xvec->flavour != bfd_target_elf_flavour
8804 || bbfd->xvec->flavour != bfd_target_elf_flavour)
8807 return elf_section_type (asec) == elf_section_type (bsec);