1 /* ELF executable support for BFD.
3 Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
4 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
5 Free Software Foundation, Inc.
7 This file is part of BFD, the Binary File Descriptor library.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
22 MA 02110-1301, USA. */
29 BFD support for ELF formats is being worked on.
30 Currently, the best supported back ends are for sparc and i386
31 (running svr4 or Solaris 2).
33 Documentation of the internals of the support code still needs
34 to be written. The code is changing quickly enough that we
35 haven't bothered yet. */
37 /* For sparc64-cross-sparc32. */
45 #include "libiberty.h"
46 #include "safe-ctype.h"
52 static int elf_sort_sections (const void *, const void *);
53 static bfd_boolean assign_file_positions_except_relocs (bfd *, struct bfd_link_info *);
54 static bfd_boolean prep_headers (bfd *);
55 static bfd_boolean swap_out_syms (bfd *, struct bfd_strtab_hash **, int) ;
56 static bfd_boolean elf_read_notes (bfd *, file_ptr, bfd_size_type) ;
57 static bfd_boolean elf_parse_notes (bfd *abfd, char *buf, size_t size,
60 /* Swap version information in and out. The version information is
61 currently size independent. If that ever changes, this code will
62 need to move into elfcode.h. */
64 /* Swap in a Verdef structure. */
67 _bfd_elf_swap_verdef_in (bfd *abfd,
68 const Elf_External_Verdef *src,
69 Elf_Internal_Verdef *dst)
71 dst->vd_version = H_GET_16 (abfd, src->vd_version);
72 dst->vd_flags = H_GET_16 (abfd, src->vd_flags);
73 dst->vd_ndx = H_GET_16 (abfd, src->vd_ndx);
74 dst->vd_cnt = H_GET_16 (abfd, src->vd_cnt);
75 dst->vd_hash = H_GET_32 (abfd, src->vd_hash);
76 dst->vd_aux = H_GET_32 (abfd, src->vd_aux);
77 dst->vd_next = H_GET_32 (abfd, src->vd_next);
80 /* Swap out a Verdef structure. */
83 _bfd_elf_swap_verdef_out (bfd *abfd,
84 const Elf_Internal_Verdef *src,
85 Elf_External_Verdef *dst)
87 H_PUT_16 (abfd, src->vd_version, dst->vd_version);
88 H_PUT_16 (abfd, src->vd_flags, dst->vd_flags);
89 H_PUT_16 (abfd, src->vd_ndx, dst->vd_ndx);
90 H_PUT_16 (abfd, src->vd_cnt, dst->vd_cnt);
91 H_PUT_32 (abfd, src->vd_hash, dst->vd_hash);
92 H_PUT_32 (abfd, src->vd_aux, dst->vd_aux);
93 H_PUT_32 (abfd, src->vd_next, dst->vd_next);
96 /* Swap in a Verdaux structure. */
99 _bfd_elf_swap_verdaux_in (bfd *abfd,
100 const Elf_External_Verdaux *src,
101 Elf_Internal_Verdaux *dst)
103 dst->vda_name = H_GET_32 (abfd, src->vda_name);
104 dst->vda_next = H_GET_32 (abfd, src->vda_next);
107 /* Swap out a Verdaux structure. */
110 _bfd_elf_swap_verdaux_out (bfd *abfd,
111 const Elf_Internal_Verdaux *src,
112 Elf_External_Verdaux *dst)
114 H_PUT_32 (abfd, src->vda_name, dst->vda_name);
115 H_PUT_32 (abfd, src->vda_next, dst->vda_next);
118 /* Swap in a Verneed structure. */
121 _bfd_elf_swap_verneed_in (bfd *abfd,
122 const Elf_External_Verneed *src,
123 Elf_Internal_Verneed *dst)
125 dst->vn_version = H_GET_16 (abfd, src->vn_version);
126 dst->vn_cnt = H_GET_16 (abfd, src->vn_cnt);
127 dst->vn_file = H_GET_32 (abfd, src->vn_file);
128 dst->vn_aux = H_GET_32 (abfd, src->vn_aux);
129 dst->vn_next = H_GET_32 (abfd, src->vn_next);
132 /* Swap out a Verneed structure. */
135 _bfd_elf_swap_verneed_out (bfd *abfd,
136 const Elf_Internal_Verneed *src,
137 Elf_External_Verneed *dst)
139 H_PUT_16 (abfd, src->vn_version, dst->vn_version);
140 H_PUT_16 (abfd, src->vn_cnt, dst->vn_cnt);
141 H_PUT_32 (abfd, src->vn_file, dst->vn_file);
142 H_PUT_32 (abfd, src->vn_aux, dst->vn_aux);
143 H_PUT_32 (abfd, src->vn_next, dst->vn_next);
146 /* Swap in a Vernaux structure. */
149 _bfd_elf_swap_vernaux_in (bfd *abfd,
150 const Elf_External_Vernaux *src,
151 Elf_Internal_Vernaux *dst)
153 dst->vna_hash = H_GET_32 (abfd, src->vna_hash);
154 dst->vna_flags = H_GET_16 (abfd, src->vna_flags);
155 dst->vna_other = H_GET_16 (abfd, src->vna_other);
156 dst->vna_name = H_GET_32 (abfd, src->vna_name);
157 dst->vna_next = H_GET_32 (abfd, src->vna_next);
160 /* Swap out a Vernaux structure. */
163 _bfd_elf_swap_vernaux_out (bfd *abfd,
164 const Elf_Internal_Vernaux *src,
165 Elf_External_Vernaux *dst)
167 H_PUT_32 (abfd, src->vna_hash, dst->vna_hash);
168 H_PUT_16 (abfd, src->vna_flags, dst->vna_flags);
169 H_PUT_16 (abfd, src->vna_other, dst->vna_other);
170 H_PUT_32 (abfd, src->vna_name, dst->vna_name);
171 H_PUT_32 (abfd, src->vna_next, dst->vna_next);
174 /* Swap in a Versym structure. */
177 _bfd_elf_swap_versym_in (bfd *abfd,
178 const Elf_External_Versym *src,
179 Elf_Internal_Versym *dst)
181 dst->vs_vers = H_GET_16 (abfd, src->vs_vers);
184 /* Swap out a Versym structure. */
187 _bfd_elf_swap_versym_out (bfd *abfd,
188 const Elf_Internal_Versym *src,
189 Elf_External_Versym *dst)
191 H_PUT_16 (abfd, src->vs_vers, dst->vs_vers);
194 /* Standard ELF hash function. Do not change this function; you will
195 cause invalid hash tables to be generated. */
198 bfd_elf_hash (const char *namearg)
200 const unsigned char *name = (const unsigned char *) namearg;
205 while ((ch = *name++) != '\0')
208 if ((g = (h & 0xf0000000)) != 0)
211 /* The ELF ABI says `h &= ~g', but this is equivalent in
212 this case and on some machines one insn instead of two. */
216 return h & 0xffffffff;
219 /* DT_GNU_HASH hash function. Do not change this function; you will
220 cause invalid hash tables to be generated. */
223 bfd_elf_gnu_hash (const char *namearg)
225 const unsigned char *name = (const unsigned char *) namearg;
226 unsigned long h = 5381;
229 while ((ch = *name++) != '\0')
230 h = (h << 5) + h + ch;
231 return h & 0xffffffff;
234 /* Create a tdata field OBJECT_SIZE bytes in length, zeroed out and with
235 the object_id field of an elf_obj_tdata field set to OBJECT_ID. */
237 bfd_elf_allocate_object (bfd *abfd,
239 enum elf_target_id object_id)
241 BFD_ASSERT (object_size >= sizeof (struct elf_obj_tdata));
242 abfd->tdata.any = bfd_zalloc (abfd, object_size);
243 if (abfd->tdata.any == NULL)
246 elf_object_id (abfd) = object_id;
247 elf_program_header_size (abfd) = (bfd_size_type) -1;
253 bfd_elf_make_object (bfd *abfd)
255 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
256 return bfd_elf_allocate_object (abfd, sizeof (struct elf_obj_tdata),
261 bfd_elf_mkcorefile (bfd *abfd)
263 /* I think this can be done just like an object file. */
264 return abfd->xvec->_bfd_set_format[(int) bfd_object] (abfd);
268 bfd_elf_get_str_section (bfd *abfd, unsigned int shindex)
270 Elf_Internal_Shdr **i_shdrp;
271 bfd_byte *shstrtab = NULL;
273 bfd_size_type shstrtabsize;
275 i_shdrp = elf_elfsections (abfd);
277 || shindex >= elf_numsections (abfd)
278 || i_shdrp[shindex] == 0)
281 shstrtab = i_shdrp[shindex]->contents;
282 if (shstrtab == NULL)
284 /* No cached one, attempt to read, and cache what we read. */
285 offset = i_shdrp[shindex]->sh_offset;
286 shstrtabsize = i_shdrp[shindex]->sh_size;
288 /* Allocate and clear an extra byte at the end, to prevent crashes
289 in case the string table is not terminated. */
290 if (shstrtabsize + 1 <= 1
291 || (shstrtab = (bfd_byte *) bfd_alloc (abfd, shstrtabsize + 1)) == NULL
292 || bfd_seek (abfd, offset, SEEK_SET) != 0)
294 else if (bfd_bread (shstrtab, shstrtabsize, abfd) != shstrtabsize)
296 if (bfd_get_error () != bfd_error_system_call)
297 bfd_set_error (bfd_error_file_truncated);
299 /* Once we've failed to read it, make sure we don't keep
300 trying. Otherwise, we'll keep allocating space for
301 the string table over and over. */
302 i_shdrp[shindex]->sh_size = 0;
305 shstrtab[shstrtabsize] = '\0';
306 i_shdrp[shindex]->contents = shstrtab;
308 return (char *) shstrtab;
312 bfd_elf_string_from_elf_section (bfd *abfd,
313 unsigned int shindex,
314 unsigned int strindex)
316 Elf_Internal_Shdr *hdr;
321 if (elf_elfsections (abfd) == NULL || shindex >= elf_numsections (abfd))
324 hdr = elf_elfsections (abfd)[shindex];
326 if (hdr->contents == NULL
327 && bfd_elf_get_str_section (abfd, shindex) == NULL)
330 if (strindex >= hdr->sh_size)
332 unsigned int shstrndx = elf_elfheader(abfd)->e_shstrndx;
333 (*_bfd_error_handler)
334 (_("%B: invalid string offset %u >= %lu for section `%s'"),
335 abfd, strindex, (unsigned long) hdr->sh_size,
336 (shindex == shstrndx && strindex == hdr->sh_name
338 : bfd_elf_string_from_elf_section (abfd, shstrndx, hdr->sh_name)));
342 return ((char *) hdr->contents) + strindex;
345 /* Read and convert symbols to internal format.
346 SYMCOUNT specifies the number of symbols to read, starting from
347 symbol SYMOFFSET. If any of INTSYM_BUF, EXTSYM_BUF or EXTSHNDX_BUF
348 are non-NULL, they are used to store the internal symbols, external
349 symbols, and symbol section index extensions, respectively.
350 Returns a pointer to the internal symbol buffer (malloced if necessary)
351 or NULL if there were no symbols or some kind of problem. */
354 bfd_elf_get_elf_syms (bfd *ibfd,
355 Elf_Internal_Shdr *symtab_hdr,
358 Elf_Internal_Sym *intsym_buf,
360 Elf_External_Sym_Shndx *extshndx_buf)
362 Elf_Internal_Shdr *shndx_hdr;
364 const bfd_byte *esym;
365 Elf_External_Sym_Shndx *alloc_extshndx;
366 Elf_External_Sym_Shndx *shndx;
367 Elf_Internal_Sym *alloc_intsym;
368 Elf_Internal_Sym *isym;
369 Elf_Internal_Sym *isymend;
370 const struct elf_backend_data *bed;
375 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
381 /* Normal syms might have section extension entries. */
383 if (symtab_hdr == &elf_tdata (ibfd)->symtab_hdr)
384 shndx_hdr = &elf_tdata (ibfd)->symtab_shndx_hdr;
386 /* Read the symbols. */
388 alloc_extshndx = NULL;
390 bed = get_elf_backend_data (ibfd);
391 extsym_size = bed->s->sizeof_sym;
392 amt = symcount * extsym_size;
393 pos = symtab_hdr->sh_offset + symoffset * extsym_size;
394 if (extsym_buf == NULL)
396 alloc_ext = bfd_malloc2 (symcount, extsym_size);
397 extsym_buf = alloc_ext;
399 if (extsym_buf == NULL
400 || bfd_seek (ibfd, pos, SEEK_SET) != 0
401 || bfd_bread (extsym_buf, amt, ibfd) != amt)
407 if (shndx_hdr == NULL || shndx_hdr->sh_size == 0)
411 amt = symcount * sizeof (Elf_External_Sym_Shndx);
412 pos = shndx_hdr->sh_offset + symoffset * sizeof (Elf_External_Sym_Shndx);
413 if (extshndx_buf == NULL)
415 alloc_extshndx = (Elf_External_Sym_Shndx *)
416 bfd_malloc2 (symcount, sizeof (Elf_External_Sym_Shndx));
417 extshndx_buf = alloc_extshndx;
419 if (extshndx_buf == NULL
420 || bfd_seek (ibfd, pos, SEEK_SET) != 0
421 || bfd_bread (extshndx_buf, amt, ibfd) != amt)
428 if (intsym_buf == NULL)
430 alloc_intsym = (Elf_Internal_Sym *)
431 bfd_malloc2 (symcount, sizeof (Elf_Internal_Sym));
432 intsym_buf = alloc_intsym;
433 if (intsym_buf == NULL)
437 /* Convert the symbols to internal form. */
438 isymend = intsym_buf + symcount;
439 for (esym = (const bfd_byte *) extsym_buf, isym = intsym_buf,
440 shndx = extshndx_buf;
442 esym += extsym_size, isym++, shndx = shndx != NULL ? shndx + 1 : NULL)
443 if (!(*bed->s->swap_symbol_in) (ibfd, esym, shndx, isym))
445 symoffset += (esym - (bfd_byte *) extsym_buf) / extsym_size;
446 (*_bfd_error_handler) (_("%B symbol number %lu references "
447 "nonexistent SHT_SYMTAB_SHNDX section"),
448 ibfd, (unsigned long) symoffset);
449 if (alloc_intsym != NULL)
456 if (alloc_ext != NULL)
458 if (alloc_extshndx != NULL)
459 free (alloc_extshndx);
464 /* Look up a symbol name. */
466 bfd_elf_sym_name (bfd *abfd,
467 Elf_Internal_Shdr *symtab_hdr,
468 Elf_Internal_Sym *isym,
472 unsigned int iname = isym->st_name;
473 unsigned int shindex = symtab_hdr->sh_link;
475 if (iname == 0 && ELF_ST_TYPE (isym->st_info) == STT_SECTION
476 /* Check for a bogus st_shndx to avoid crashing. */
477 && isym->st_shndx < elf_numsections (abfd))
479 iname = elf_elfsections (abfd)[isym->st_shndx]->sh_name;
480 shindex = elf_elfheader (abfd)->e_shstrndx;
483 name = bfd_elf_string_from_elf_section (abfd, shindex, iname);
486 else if (sym_sec && *name == '\0')
487 name = bfd_section_name (abfd, sym_sec);
492 /* Elf_Internal_Shdr->contents is an array of these for SHT_GROUP
493 sections. The first element is the flags, the rest are section
496 typedef union elf_internal_group {
497 Elf_Internal_Shdr *shdr;
499 } Elf_Internal_Group;
501 /* Return the name of the group signature symbol. Why isn't the
502 signature just a string? */
505 group_signature (bfd *abfd, Elf_Internal_Shdr *ghdr)
507 Elf_Internal_Shdr *hdr;
508 unsigned char esym[sizeof (Elf64_External_Sym)];
509 Elf_External_Sym_Shndx eshndx;
510 Elf_Internal_Sym isym;
512 /* First we need to ensure the symbol table is available. Make sure
513 that it is a symbol table section. */
514 if (ghdr->sh_link >= elf_numsections (abfd))
516 hdr = elf_elfsections (abfd) [ghdr->sh_link];
517 if (hdr->sh_type != SHT_SYMTAB
518 || ! bfd_section_from_shdr (abfd, ghdr->sh_link))
521 /* Go read the symbol. */
522 hdr = &elf_tdata (abfd)->symtab_hdr;
523 if (bfd_elf_get_elf_syms (abfd, hdr, 1, ghdr->sh_info,
524 &isym, esym, &eshndx) == NULL)
527 return bfd_elf_sym_name (abfd, hdr, &isym, NULL);
530 /* Set next_in_group list pointer, and group name for NEWSECT. */
533 setup_group (bfd *abfd, Elf_Internal_Shdr *hdr, asection *newsect)
535 unsigned int num_group = elf_tdata (abfd)->num_group;
537 /* If num_group is zero, read in all SHT_GROUP sections. The count
538 is set to -1 if there are no SHT_GROUP sections. */
541 unsigned int i, shnum;
543 /* First count the number of groups. If we have a SHT_GROUP
544 section with just a flag word (ie. sh_size is 4), ignore it. */
545 shnum = elf_numsections (abfd);
548 #define IS_VALID_GROUP_SECTION_HEADER(shdr) \
549 ( (shdr)->sh_type == SHT_GROUP \
550 && (shdr)->sh_size >= (2 * GRP_ENTRY_SIZE) \
551 && (shdr)->sh_entsize == GRP_ENTRY_SIZE \
552 && ((shdr)->sh_size % GRP_ENTRY_SIZE) == 0)
554 for (i = 0; i < shnum; i++)
556 Elf_Internal_Shdr *shdr = elf_elfsections (abfd)[i];
558 if (IS_VALID_GROUP_SECTION_HEADER (shdr))
564 num_group = (unsigned) -1;
565 elf_tdata (abfd)->num_group = num_group;
569 /* We keep a list of elf section headers for group sections,
570 so we can find them quickly. */
573 elf_tdata (abfd)->num_group = num_group;
574 elf_tdata (abfd)->group_sect_ptr = (Elf_Internal_Shdr **)
575 bfd_alloc2 (abfd, num_group, sizeof (Elf_Internal_Shdr *));
576 if (elf_tdata (abfd)->group_sect_ptr == NULL)
580 for (i = 0; i < shnum; i++)
582 Elf_Internal_Shdr *shdr = elf_elfsections (abfd)[i];
584 if (IS_VALID_GROUP_SECTION_HEADER (shdr))
587 Elf_Internal_Group *dest;
589 /* Add to list of sections. */
590 elf_tdata (abfd)->group_sect_ptr[num_group] = shdr;
593 /* Read the raw contents. */
594 BFD_ASSERT (sizeof (*dest) >= 4);
595 amt = shdr->sh_size * sizeof (*dest) / 4;
596 shdr->contents = (unsigned char *)
597 bfd_alloc2 (abfd, shdr->sh_size, sizeof (*dest) / 4);
598 /* PR binutils/4110: Handle corrupt group headers. */
599 if (shdr->contents == NULL)
602 (_("%B: Corrupt size field in group section header: 0x%lx"), abfd, shdr->sh_size);
603 bfd_set_error (bfd_error_bad_value);
607 memset (shdr->contents, 0, amt);
609 if (bfd_seek (abfd, shdr->sh_offset, SEEK_SET) != 0
610 || (bfd_bread (shdr->contents, shdr->sh_size, abfd)
614 /* Translate raw contents, a flag word followed by an
615 array of elf section indices all in target byte order,
616 to the flag word followed by an array of elf section
618 src = shdr->contents + shdr->sh_size;
619 dest = (Elf_Internal_Group *) (shdr->contents + amt);
626 idx = H_GET_32 (abfd, src);
627 if (src == shdr->contents)
630 if (shdr->bfd_section != NULL && (idx & GRP_COMDAT))
631 shdr->bfd_section->flags
632 |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
637 ((*_bfd_error_handler)
638 (_("%B: invalid SHT_GROUP entry"), abfd));
641 dest->shdr = elf_elfsections (abfd)[idx];
648 if (num_group != (unsigned) -1)
652 for (i = 0; i < num_group; i++)
654 Elf_Internal_Shdr *shdr = elf_tdata (abfd)->group_sect_ptr[i];
655 Elf_Internal_Group *idx = (Elf_Internal_Group *) shdr->contents;
656 unsigned int n_elt = shdr->sh_size / 4;
658 /* Look through this group's sections to see if current
659 section is a member. */
661 if ((++idx)->shdr == hdr)
665 /* We are a member of this group. Go looking through
666 other members to see if any others are linked via
668 idx = (Elf_Internal_Group *) shdr->contents;
669 n_elt = shdr->sh_size / 4;
671 if ((s = (++idx)->shdr->bfd_section) != NULL
672 && elf_next_in_group (s) != NULL)
676 /* Snarf the group name from other member, and
677 insert current section in circular list. */
678 elf_group_name (newsect) = elf_group_name (s);
679 elf_next_in_group (newsect) = elf_next_in_group (s);
680 elf_next_in_group (s) = newsect;
686 gname = group_signature (abfd, shdr);
689 elf_group_name (newsect) = gname;
691 /* Start a circular list with one element. */
692 elf_next_in_group (newsect) = newsect;
695 /* If the group section has been created, point to the
697 if (shdr->bfd_section != NULL)
698 elf_next_in_group (shdr->bfd_section) = newsect;
706 if (elf_group_name (newsect) == NULL)
708 (*_bfd_error_handler) (_("%B: no group info for section %A"),
715 _bfd_elf_setup_sections (bfd *abfd)
718 unsigned int num_group = elf_tdata (abfd)->num_group;
719 bfd_boolean result = TRUE;
722 /* Process SHF_LINK_ORDER. */
723 for (s = abfd->sections; s != NULL; s = s->next)
725 Elf_Internal_Shdr *this_hdr = &elf_section_data (s)->this_hdr;
726 if ((this_hdr->sh_flags & SHF_LINK_ORDER) != 0)
728 unsigned int elfsec = this_hdr->sh_link;
729 /* FIXME: The old Intel compiler and old strip/objcopy may
730 not set the sh_link or sh_info fields. Hence we could
731 get the situation where elfsec is 0. */
734 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
735 if (bed->link_order_error_handler)
736 bed->link_order_error_handler
737 (_("%B: warning: sh_link not set for section `%A'"),
742 asection *linksec = NULL;
744 if (elfsec < elf_numsections (abfd))
746 this_hdr = elf_elfsections (abfd)[elfsec];
747 linksec = this_hdr->bfd_section;
751 Some strip/objcopy may leave an incorrect value in
752 sh_link. We don't want to proceed. */
755 (*_bfd_error_handler)
756 (_("%B: sh_link [%d] in section `%A' is incorrect"),
757 s->owner, s, elfsec);
761 elf_linked_to_section (s) = linksec;
766 /* Process section groups. */
767 if (num_group == (unsigned) -1)
770 for (i = 0; i < num_group; i++)
772 Elf_Internal_Shdr *shdr = elf_tdata (abfd)->group_sect_ptr[i];
773 Elf_Internal_Group *idx = (Elf_Internal_Group *) shdr->contents;
774 unsigned int n_elt = shdr->sh_size / 4;
777 if ((++idx)->shdr->bfd_section)
778 elf_sec_group (idx->shdr->bfd_section) = shdr->bfd_section;
779 else if (idx->shdr->sh_type == SHT_RELA
780 || idx->shdr->sh_type == SHT_REL)
781 /* We won't include relocation sections in section groups in
782 output object files. We adjust the group section size here
783 so that relocatable link will work correctly when
784 relocation sections are in section group in input object
786 shdr->bfd_section->size -= 4;
789 /* There are some unknown sections in the group. */
790 (*_bfd_error_handler)
791 (_("%B: unknown [%d] section `%s' in group [%s]"),
793 (unsigned int) idx->shdr->sh_type,
794 bfd_elf_string_from_elf_section (abfd,
795 (elf_elfheader (abfd)
798 shdr->bfd_section->name);
806 bfd_elf_is_group_section (bfd *abfd ATTRIBUTE_UNUSED, const asection *sec)
808 return elf_next_in_group (sec) != NULL;
811 /* Make a BFD section from an ELF section. We store a pointer to the
812 BFD section in the bfd_section field of the header. */
815 _bfd_elf_make_section_from_shdr (bfd *abfd,
816 Elf_Internal_Shdr *hdr,
822 const struct elf_backend_data *bed;
824 if (hdr->bfd_section != NULL)
827 newsect = bfd_make_section_anyway (abfd, name);
831 hdr->bfd_section = newsect;
832 elf_section_data (newsect)->this_hdr = *hdr;
833 elf_section_data (newsect)->this_idx = shindex;
835 /* Always use the real type/flags. */
836 elf_section_type (newsect) = hdr->sh_type;
837 elf_section_flags (newsect) = hdr->sh_flags;
839 newsect->filepos = hdr->sh_offset;
841 if (! bfd_set_section_vma (abfd, newsect, hdr->sh_addr)
842 || ! bfd_set_section_size (abfd, newsect, hdr->sh_size)
843 || ! bfd_set_section_alignment (abfd, newsect,
844 bfd_log2 (hdr->sh_addralign)))
847 flags = SEC_NO_FLAGS;
848 if (hdr->sh_type != SHT_NOBITS)
849 flags |= SEC_HAS_CONTENTS;
850 if (hdr->sh_type == SHT_GROUP)
851 flags |= SEC_GROUP | SEC_EXCLUDE;
852 if ((hdr->sh_flags & SHF_ALLOC) != 0)
855 if (hdr->sh_type != SHT_NOBITS)
858 if ((hdr->sh_flags & SHF_WRITE) == 0)
859 flags |= SEC_READONLY;
860 if ((hdr->sh_flags & SHF_EXECINSTR) != 0)
862 else if ((flags & SEC_LOAD) != 0)
864 if ((hdr->sh_flags & SHF_MERGE) != 0)
867 newsect->entsize = hdr->sh_entsize;
868 if ((hdr->sh_flags & SHF_STRINGS) != 0)
869 flags |= SEC_STRINGS;
871 if (hdr->sh_flags & SHF_GROUP)
872 if (!setup_group (abfd, hdr, newsect))
874 if ((hdr->sh_flags & SHF_TLS) != 0)
875 flags |= SEC_THREAD_LOCAL;
876 if ((hdr->sh_flags & SHF_EXCLUDE) != 0)
877 flags |= SEC_EXCLUDE;
879 if ((flags & SEC_ALLOC) == 0)
881 /* The debugging sections appear to be recognized only by name,
882 not any sort of flag. Their SEC_ALLOC bits are cleared. */
887 } debug_sections [] =
889 { STRING_COMMA_LEN ("debug") }, /* 'd' */
890 { NULL, 0 }, /* 'e' */
891 { NULL, 0 }, /* 'f' */
892 { STRING_COMMA_LEN ("gnu.linkonce.wi.") }, /* 'g' */
893 { NULL, 0 }, /* 'h' */
894 { NULL, 0 }, /* 'i' */
895 { NULL, 0 }, /* 'j' */
896 { NULL, 0 }, /* 'k' */
897 { STRING_COMMA_LEN ("line") }, /* 'l' */
898 { NULL, 0 }, /* 'm' */
899 { NULL, 0 }, /* 'n' */
900 { NULL, 0 }, /* 'o' */
901 { NULL, 0 }, /* 'p' */
902 { NULL, 0 }, /* 'q' */
903 { NULL, 0 }, /* 'r' */
904 { STRING_COMMA_LEN ("stab") }, /* 's' */
905 { NULL, 0 }, /* 't' */
906 { NULL, 0 }, /* 'u' */
907 { NULL, 0 }, /* 'v' */
908 { NULL, 0 }, /* 'w' */
909 { NULL, 0 }, /* 'x' */
910 { NULL, 0 }, /* 'y' */
911 { STRING_COMMA_LEN ("zdebug") } /* 'z' */
916 int i = name [1] - 'd';
918 && i < (int) ARRAY_SIZE (debug_sections)
919 && debug_sections [i].name != NULL
920 && strncmp (&name [1], debug_sections [i].name,
921 debug_sections [i].len) == 0)
922 flags |= SEC_DEBUGGING;
926 /* As a GNU extension, if the name begins with .gnu.linkonce, we
927 only link a single copy of the section. This is used to support
928 g++. g++ will emit each template expansion in its own section.
929 The symbols will be defined as weak, so that multiple definitions
930 are permitted. The GNU linker extension is to actually discard
931 all but one of the sections. */
932 if (CONST_STRNEQ (name, ".gnu.linkonce")
933 && elf_next_in_group (newsect) == NULL)
934 flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
936 bed = get_elf_backend_data (abfd);
937 if (bed->elf_backend_section_flags)
938 if (! bed->elf_backend_section_flags (&flags, hdr))
941 if (! bfd_set_section_flags (abfd, newsect, flags))
944 /* We do not parse the PT_NOTE segments as we are interested even in the
945 separate debug info files which may have the segments offsets corrupted.
946 PT_NOTEs from the core files are currently not parsed using BFD. */
947 if (hdr->sh_type == SHT_NOTE)
951 if (!bfd_malloc_and_get_section (abfd, newsect, &contents))
954 elf_parse_notes (abfd, (char *) contents, hdr->sh_size, -1);
958 if ((flags & SEC_ALLOC) != 0)
960 Elf_Internal_Phdr *phdr;
961 unsigned int i, nload;
963 /* Some ELF linkers produce binaries with all the program header
964 p_paddr fields zero. If we have such a binary with more than
965 one PT_LOAD header, then leave the section lma equal to vma
966 so that we don't create sections with overlapping lma. */
967 phdr = elf_tdata (abfd)->phdr;
968 for (nload = 0, i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
969 if (phdr->p_paddr != 0)
971 else if (phdr->p_type == PT_LOAD && phdr->p_memsz != 0)
973 if (i >= elf_elfheader (abfd)->e_phnum && nload > 1)
976 phdr = elf_tdata (abfd)->phdr;
977 for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
979 if (((phdr->p_type == PT_LOAD
980 && (hdr->sh_flags & SHF_TLS) == 0)
981 || phdr->p_type == PT_TLS)
982 && ELF_SECTION_IN_SEGMENT (hdr, phdr))
984 if ((flags & SEC_LOAD) == 0)
985 newsect->lma = (phdr->p_paddr
986 + hdr->sh_addr - phdr->p_vaddr);
988 /* We used to use the same adjustment for SEC_LOAD
989 sections, but that doesn't work if the segment
990 is packed with code from multiple VMAs.
991 Instead we calculate the section LMA based on
992 the segment LMA. It is assumed that the
993 segment will contain sections with contiguous
994 LMAs, even if the VMAs are not. */
995 newsect->lma = (phdr->p_paddr
996 + hdr->sh_offset - phdr->p_offset);
998 /* With contiguous segments, we can't tell from file
999 offsets whether a section with zero size should
1000 be placed at the end of one segment or the
1001 beginning of the next. Decide based on vaddr. */
1002 if (hdr->sh_addr >= phdr->p_vaddr
1003 && (hdr->sh_addr + hdr->sh_size
1004 <= phdr->p_vaddr + phdr->p_memsz))
1010 /* Compress/decompress DWARF debug sections with names: .debug_* and
1011 .zdebug_*, after the section flags is set. */
1012 if ((flags & SEC_DEBUGGING)
1013 && ((name[1] == 'd' && name[6] == '_')
1014 || (name[1] == 'z' && name[7] == '_')))
1016 enum { nothing, compress, decompress } action = nothing;
1019 if (bfd_is_section_compressed (abfd, newsect))
1021 /* Compressed section. Check if we should decompress. */
1022 if ((abfd->flags & BFD_DECOMPRESS))
1023 action = decompress;
1027 /* Normal section. Check if we should compress. */
1028 if ((abfd->flags & BFD_COMPRESS))
1038 if (!bfd_init_section_compress_status (abfd, newsect))
1040 (*_bfd_error_handler)
1041 (_("%B: unable to initialize commpress status for section %s"),
1047 unsigned int len = strlen (name);
1049 new_name = bfd_alloc (abfd, len + 2);
1050 if (new_name == NULL)
1054 memcpy (new_name + 2, name + 1, len);
1058 if (!bfd_init_section_decompress_status (abfd, newsect))
1060 (*_bfd_error_handler)
1061 (_("%B: unable to initialize decommpress status for section %s"),
1067 unsigned int len = strlen (name);
1069 new_name = bfd_alloc (abfd, len);
1070 if (new_name == NULL)
1073 memcpy (new_name + 1, name + 2, len - 1);
1077 if (new_name != NULL)
1078 bfd_rename_section (abfd, newsect, new_name);
1084 const char *const bfd_elf_section_type_names[] = {
1085 "SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB",
1086 "SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE",
1087 "SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM",
1090 /* ELF relocs are against symbols. If we are producing relocatable
1091 output, and the reloc is against an external symbol, and nothing
1092 has given us any additional addend, the resulting reloc will also
1093 be against the same symbol. In such a case, we don't want to
1094 change anything about the way the reloc is handled, since it will
1095 all be done at final link time. Rather than put special case code
1096 into bfd_perform_relocation, all the reloc types use this howto
1097 function. It just short circuits the reloc if producing
1098 relocatable output against an external symbol. */
1100 bfd_reloc_status_type
1101 bfd_elf_generic_reloc (bfd *abfd ATTRIBUTE_UNUSED,
1102 arelent *reloc_entry,
1104 void *data ATTRIBUTE_UNUSED,
1105 asection *input_section,
1107 char **error_message ATTRIBUTE_UNUSED)
1109 if (output_bfd != NULL
1110 && (symbol->flags & BSF_SECTION_SYM) == 0
1111 && (! reloc_entry->howto->partial_inplace
1112 || reloc_entry->addend == 0))
1114 reloc_entry->address += input_section->output_offset;
1115 return bfd_reloc_ok;
1118 return bfd_reloc_continue;
1121 /* Copy the program header and other data from one object module to
1125 _bfd_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
1127 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
1128 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
1131 BFD_ASSERT (!elf_flags_init (obfd)
1132 || (elf_elfheader (obfd)->e_flags
1133 == elf_elfheader (ibfd)->e_flags));
1135 elf_gp (obfd) = elf_gp (ibfd);
1136 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
1137 elf_flags_init (obfd) = TRUE;
1139 /* Copy object attributes. */
1140 _bfd_elf_copy_obj_attributes (ibfd, obfd);
1145 get_segment_type (unsigned int p_type)
1150 case PT_NULL: pt = "NULL"; break;
1151 case PT_LOAD: pt = "LOAD"; break;
1152 case PT_DYNAMIC: pt = "DYNAMIC"; break;
1153 case PT_INTERP: pt = "INTERP"; break;
1154 case PT_NOTE: pt = "NOTE"; break;
1155 case PT_SHLIB: pt = "SHLIB"; break;
1156 case PT_PHDR: pt = "PHDR"; break;
1157 case PT_TLS: pt = "TLS"; break;
1158 case PT_GNU_EH_FRAME: pt = "EH_FRAME"; break;
1159 case PT_GNU_STACK: pt = "STACK"; break;
1160 case PT_GNU_RELRO: pt = "RELRO"; break;
1161 default: pt = NULL; break;
1166 /* Print out the program headers. */
1169 _bfd_elf_print_private_bfd_data (bfd *abfd, void *farg)
1171 FILE *f = (FILE *) farg;
1172 Elf_Internal_Phdr *p;
1174 bfd_byte *dynbuf = NULL;
1176 p = elf_tdata (abfd)->phdr;
1181 fprintf (f, _("\nProgram Header:\n"));
1182 c = elf_elfheader (abfd)->e_phnum;
1183 for (i = 0; i < c; i++, p++)
1185 const char *pt = get_segment_type (p->p_type);
1190 sprintf (buf, "0x%lx", p->p_type);
1193 fprintf (f, "%8s off 0x", pt);
1194 bfd_fprintf_vma (abfd, f, p->p_offset);
1195 fprintf (f, " vaddr 0x");
1196 bfd_fprintf_vma (abfd, f, p->p_vaddr);
1197 fprintf (f, " paddr 0x");
1198 bfd_fprintf_vma (abfd, f, p->p_paddr);
1199 fprintf (f, " align 2**%u\n", bfd_log2 (p->p_align));
1200 fprintf (f, " filesz 0x");
1201 bfd_fprintf_vma (abfd, f, p->p_filesz);
1202 fprintf (f, " memsz 0x");
1203 bfd_fprintf_vma (abfd, f, p->p_memsz);
1204 fprintf (f, " flags %c%c%c",
1205 (p->p_flags & PF_R) != 0 ? 'r' : '-',
1206 (p->p_flags & PF_W) != 0 ? 'w' : '-',
1207 (p->p_flags & PF_X) != 0 ? 'x' : '-');
1208 if ((p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X)) != 0)
1209 fprintf (f, " %lx", p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X));
1214 s = bfd_get_section_by_name (abfd, ".dynamic");
1217 unsigned int elfsec;
1218 unsigned long shlink;
1219 bfd_byte *extdyn, *extdynend;
1221 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
1223 fprintf (f, _("\nDynamic Section:\n"));
1225 if (!bfd_malloc_and_get_section (abfd, s, &dynbuf))
1228 elfsec = _bfd_elf_section_from_bfd_section (abfd, s);
1229 if (elfsec == SHN_BAD)
1231 shlink = elf_elfsections (abfd)[elfsec]->sh_link;
1233 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
1234 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
1237 extdynend = extdyn + s->size;
1238 for (; extdyn < extdynend; extdyn += extdynsize)
1240 Elf_Internal_Dyn dyn;
1241 const char *name = "";
1243 bfd_boolean stringp;
1244 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
1246 (*swap_dyn_in) (abfd, extdyn, &dyn);
1248 if (dyn.d_tag == DT_NULL)
1255 if (bed->elf_backend_get_target_dtag)
1256 name = (*bed->elf_backend_get_target_dtag) (dyn.d_tag);
1258 if (!strcmp (name, ""))
1260 sprintf (ab, "0x%lx", (unsigned long) dyn.d_tag);
1265 case DT_NEEDED: name = "NEEDED"; stringp = TRUE; break;
1266 case DT_PLTRELSZ: name = "PLTRELSZ"; break;
1267 case DT_PLTGOT: name = "PLTGOT"; break;
1268 case DT_HASH: name = "HASH"; break;
1269 case DT_STRTAB: name = "STRTAB"; break;
1270 case DT_SYMTAB: name = "SYMTAB"; break;
1271 case DT_RELA: name = "RELA"; break;
1272 case DT_RELASZ: name = "RELASZ"; break;
1273 case DT_RELAENT: name = "RELAENT"; break;
1274 case DT_STRSZ: name = "STRSZ"; break;
1275 case DT_SYMENT: name = "SYMENT"; break;
1276 case DT_INIT: name = "INIT"; break;
1277 case DT_FINI: name = "FINI"; break;
1278 case DT_SONAME: name = "SONAME"; stringp = TRUE; break;
1279 case DT_RPATH: name = "RPATH"; stringp = TRUE; break;
1280 case DT_SYMBOLIC: name = "SYMBOLIC"; break;
1281 case DT_REL: name = "REL"; break;
1282 case DT_RELSZ: name = "RELSZ"; break;
1283 case DT_RELENT: name = "RELENT"; break;
1284 case DT_PLTREL: name = "PLTREL"; break;
1285 case DT_DEBUG: name = "DEBUG"; break;
1286 case DT_TEXTREL: name = "TEXTREL"; break;
1287 case DT_JMPREL: name = "JMPREL"; break;
1288 case DT_BIND_NOW: name = "BIND_NOW"; break;
1289 case DT_INIT_ARRAY: name = "INIT_ARRAY"; break;
1290 case DT_FINI_ARRAY: name = "FINI_ARRAY"; break;
1291 case DT_INIT_ARRAYSZ: name = "INIT_ARRAYSZ"; break;
1292 case DT_FINI_ARRAYSZ: name = "FINI_ARRAYSZ"; break;
1293 case DT_RUNPATH: name = "RUNPATH"; stringp = TRUE; break;
1294 case DT_FLAGS: name = "FLAGS"; break;
1295 case DT_PREINIT_ARRAY: name = "PREINIT_ARRAY"; break;
1296 case DT_PREINIT_ARRAYSZ: name = "PREINIT_ARRAYSZ"; break;
1297 case DT_CHECKSUM: name = "CHECKSUM"; break;
1298 case DT_PLTPADSZ: name = "PLTPADSZ"; break;
1299 case DT_MOVEENT: name = "MOVEENT"; break;
1300 case DT_MOVESZ: name = "MOVESZ"; break;
1301 case DT_FEATURE: name = "FEATURE"; break;
1302 case DT_POSFLAG_1: name = "POSFLAG_1"; break;
1303 case DT_SYMINSZ: name = "SYMINSZ"; break;
1304 case DT_SYMINENT: name = "SYMINENT"; break;
1305 case DT_CONFIG: name = "CONFIG"; stringp = TRUE; break;
1306 case DT_DEPAUDIT: name = "DEPAUDIT"; stringp = TRUE; break;
1307 case DT_AUDIT: name = "AUDIT"; stringp = TRUE; break;
1308 case DT_PLTPAD: name = "PLTPAD"; break;
1309 case DT_MOVETAB: name = "MOVETAB"; break;
1310 case DT_SYMINFO: name = "SYMINFO"; break;
1311 case DT_RELACOUNT: name = "RELACOUNT"; break;
1312 case DT_RELCOUNT: name = "RELCOUNT"; break;
1313 case DT_FLAGS_1: name = "FLAGS_1"; break;
1314 case DT_VERSYM: name = "VERSYM"; break;
1315 case DT_VERDEF: name = "VERDEF"; break;
1316 case DT_VERDEFNUM: name = "VERDEFNUM"; break;
1317 case DT_VERNEED: name = "VERNEED"; break;
1318 case DT_VERNEEDNUM: name = "VERNEEDNUM"; break;
1319 case DT_AUXILIARY: name = "AUXILIARY"; stringp = TRUE; break;
1320 case DT_USED: name = "USED"; break;
1321 case DT_FILTER: name = "FILTER"; stringp = TRUE; break;
1322 case DT_GNU_HASH: name = "GNU_HASH"; break;
1325 fprintf (f, " %-20s ", name);
1329 bfd_fprintf_vma (abfd, f, dyn.d_un.d_val);
1334 unsigned int tagv = dyn.d_un.d_val;
1336 string = bfd_elf_string_from_elf_section (abfd, shlink, tagv);
1339 fprintf (f, "%s", string);
1348 if ((elf_dynverdef (abfd) != 0 && elf_tdata (abfd)->verdef == NULL)
1349 || (elf_dynverref (abfd) != 0 && elf_tdata (abfd)->verref == NULL))
1351 if (! _bfd_elf_slurp_version_tables (abfd, FALSE))
1355 if (elf_dynverdef (abfd) != 0)
1357 Elf_Internal_Verdef *t;
1359 fprintf (f, _("\nVersion definitions:\n"));
1360 for (t = elf_tdata (abfd)->verdef; t != NULL; t = t->vd_nextdef)
1362 fprintf (f, "%d 0x%2.2x 0x%8.8lx %s\n", t->vd_ndx,
1363 t->vd_flags, t->vd_hash,
1364 t->vd_nodename ? t->vd_nodename : "<corrupt>");
1365 if (t->vd_auxptr != NULL && t->vd_auxptr->vda_nextptr != NULL)
1367 Elf_Internal_Verdaux *a;
1370 for (a = t->vd_auxptr->vda_nextptr;
1374 a->vda_nodename ? a->vda_nodename : "<corrupt>");
1380 if (elf_dynverref (abfd) != 0)
1382 Elf_Internal_Verneed *t;
1384 fprintf (f, _("\nVersion References:\n"));
1385 for (t = elf_tdata (abfd)->verref; t != NULL; t = t->vn_nextref)
1387 Elf_Internal_Vernaux *a;
1389 fprintf (f, _(" required from %s:\n"),
1390 t->vn_filename ? t->vn_filename : "<corrupt>");
1391 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
1392 fprintf (f, " 0x%8.8lx 0x%2.2x %2.2d %s\n", a->vna_hash,
1393 a->vna_flags, a->vna_other,
1394 a->vna_nodename ? a->vna_nodename : "<corrupt>");
1406 /* Display ELF-specific fields of a symbol. */
1409 bfd_elf_print_symbol (bfd *abfd,
1412 bfd_print_symbol_type how)
1414 FILE *file = (FILE *) filep;
1417 case bfd_print_symbol_name:
1418 fprintf (file, "%s", symbol->name);
1420 case bfd_print_symbol_more:
1421 fprintf (file, "elf ");
1422 bfd_fprintf_vma (abfd, file, symbol->value);
1423 fprintf (file, " %lx", (unsigned long) symbol->flags);
1425 case bfd_print_symbol_all:
1427 const char *section_name;
1428 const char *name = NULL;
1429 const struct elf_backend_data *bed;
1430 unsigned char st_other;
1433 section_name = symbol->section ? symbol->section->name : "(*none*)";
1435 bed = get_elf_backend_data (abfd);
1436 if (bed->elf_backend_print_symbol_all)
1437 name = (*bed->elf_backend_print_symbol_all) (abfd, filep, symbol);
1441 name = symbol->name;
1442 bfd_print_symbol_vandf (abfd, file, symbol);
1445 fprintf (file, " %s\t", section_name);
1446 /* Print the "other" value for a symbol. For common symbols,
1447 we've already printed the size; now print the alignment.
1448 For other symbols, we have no specified alignment, and
1449 we've printed the address; now print the size. */
1450 if (symbol->section && bfd_is_com_section (symbol->section))
1451 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_value;
1453 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_size;
1454 bfd_fprintf_vma (abfd, file, val);
1456 /* If we have version information, print it. */
1457 if (elf_tdata (abfd)->dynversym_section != 0
1458 && (elf_tdata (abfd)->dynverdef_section != 0
1459 || elf_tdata (abfd)->dynverref_section != 0))
1461 unsigned int vernum;
1462 const char *version_string;
1464 vernum = ((elf_symbol_type *) symbol)->version & VERSYM_VERSION;
1467 version_string = "";
1468 else if (vernum == 1)
1469 version_string = "Base";
1470 else if (vernum <= elf_tdata (abfd)->cverdefs)
1472 elf_tdata (abfd)->verdef[vernum - 1].vd_nodename;
1475 Elf_Internal_Verneed *t;
1477 version_string = "";
1478 for (t = elf_tdata (abfd)->verref;
1482 Elf_Internal_Vernaux *a;
1484 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
1486 if (a->vna_other == vernum)
1488 version_string = a->vna_nodename;
1495 if ((((elf_symbol_type *) symbol)->version & VERSYM_HIDDEN) == 0)
1496 fprintf (file, " %-11s", version_string);
1501 fprintf (file, " (%s)", version_string);
1502 for (i = 10 - strlen (version_string); i > 0; --i)
1507 /* If the st_other field is not zero, print it. */
1508 st_other = ((elf_symbol_type *) symbol)->internal_elf_sym.st_other;
1513 case STV_INTERNAL: fprintf (file, " .internal"); break;
1514 case STV_HIDDEN: fprintf (file, " .hidden"); break;
1515 case STV_PROTECTED: fprintf (file, " .protected"); break;
1517 /* Some other non-defined flags are also present, so print
1519 fprintf (file, " 0x%02x", (unsigned int) st_other);
1522 fprintf (file, " %s", name);
1528 /* Allocate an ELF string table--force the first byte to be zero. */
1530 struct bfd_strtab_hash *
1531 _bfd_elf_stringtab_init (void)
1533 struct bfd_strtab_hash *ret;
1535 ret = _bfd_stringtab_init ();
1540 loc = _bfd_stringtab_add (ret, "", TRUE, FALSE);
1541 BFD_ASSERT (loc == 0 || loc == (bfd_size_type) -1);
1542 if (loc == (bfd_size_type) -1)
1544 _bfd_stringtab_free (ret);
1551 /* ELF .o/exec file reading */
1553 /* Create a new bfd section from an ELF section header. */
1556 bfd_section_from_shdr (bfd *abfd, unsigned int shindex)
1558 Elf_Internal_Shdr *hdr;
1559 Elf_Internal_Ehdr *ehdr;
1560 const struct elf_backend_data *bed;
1563 if (shindex >= elf_numsections (abfd))
1566 hdr = elf_elfsections (abfd)[shindex];
1567 ehdr = elf_elfheader (abfd);
1568 name = bfd_elf_string_from_elf_section (abfd, ehdr->e_shstrndx,
1573 bed = get_elf_backend_data (abfd);
1574 switch (hdr->sh_type)
1577 /* Inactive section. Throw it away. */
1580 case SHT_PROGBITS: /* Normal section with contents. */
1581 case SHT_NOBITS: /* .bss section. */
1582 case SHT_HASH: /* .hash section. */
1583 case SHT_NOTE: /* .note section. */
1584 case SHT_INIT_ARRAY: /* .init_array section. */
1585 case SHT_FINI_ARRAY: /* .fini_array section. */
1586 case SHT_PREINIT_ARRAY: /* .preinit_array section. */
1587 case SHT_GNU_LIBLIST: /* .gnu.liblist section. */
1588 case SHT_GNU_HASH: /* .gnu.hash section. */
1589 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1591 case SHT_DYNAMIC: /* Dynamic linking information. */
1592 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1594 if (hdr->sh_link > elf_numsections (abfd))
1596 /* PR 10478: Accept Solaris binaries with a sh_link
1597 field set to SHN_BEFORE or SHN_AFTER. */
1598 switch (bfd_get_arch (abfd))
1601 case bfd_arch_sparc:
1602 if (hdr->sh_link == (SHN_LORESERVE & 0xffff) /* SHN_BEFORE */
1603 || hdr->sh_link == ((SHN_LORESERVE + 1) & 0xffff) /* SHN_AFTER */)
1605 /* Otherwise fall through. */
1610 else if (elf_elfsections (abfd)[hdr->sh_link] == NULL)
1612 else if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_STRTAB)
1614 Elf_Internal_Shdr *dynsymhdr;
1616 /* The shared libraries distributed with hpux11 have a bogus
1617 sh_link field for the ".dynamic" section. Find the
1618 string table for the ".dynsym" section instead. */
1619 if (elf_dynsymtab (abfd) != 0)
1621 dynsymhdr = elf_elfsections (abfd)[elf_dynsymtab (abfd)];
1622 hdr->sh_link = dynsymhdr->sh_link;
1626 unsigned int i, num_sec;
1628 num_sec = elf_numsections (abfd);
1629 for (i = 1; i < num_sec; i++)
1631 dynsymhdr = elf_elfsections (abfd)[i];
1632 if (dynsymhdr->sh_type == SHT_DYNSYM)
1634 hdr->sh_link = dynsymhdr->sh_link;
1642 case SHT_SYMTAB: /* A symbol table */
1643 if (elf_onesymtab (abfd) == shindex)
1646 if (hdr->sh_entsize != bed->s->sizeof_sym)
1648 if (hdr->sh_info * hdr->sh_entsize > hdr->sh_size)
1650 BFD_ASSERT (elf_onesymtab (abfd) == 0);
1651 elf_onesymtab (abfd) = shindex;
1652 elf_tdata (abfd)->symtab_hdr = *hdr;
1653 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->symtab_hdr;
1654 abfd->flags |= HAS_SYMS;
1656 /* Sometimes a shared object will map in the symbol table. If
1657 SHF_ALLOC is set, and this is a shared object, then we also
1658 treat this section as a BFD section. We can not base the
1659 decision purely on SHF_ALLOC, because that flag is sometimes
1660 set in a relocatable object file, which would confuse the
1662 if ((hdr->sh_flags & SHF_ALLOC) != 0
1663 && (abfd->flags & DYNAMIC) != 0
1664 && ! _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1668 /* Go looking for SHT_SYMTAB_SHNDX too, since if there is one we
1669 can't read symbols without that section loaded as well. It
1670 is most likely specified by the next section header. */
1671 if (elf_elfsections (abfd)[elf_symtab_shndx (abfd)]->sh_link != shindex)
1673 unsigned int i, num_sec;
1675 num_sec = elf_numsections (abfd);
1676 for (i = shindex + 1; i < num_sec; i++)
1678 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1679 if (hdr2->sh_type == SHT_SYMTAB_SHNDX
1680 && hdr2->sh_link == shindex)
1684 for (i = 1; i < shindex; i++)
1686 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1687 if (hdr2->sh_type == SHT_SYMTAB_SHNDX
1688 && hdr2->sh_link == shindex)
1692 return bfd_section_from_shdr (abfd, i);
1696 case SHT_DYNSYM: /* A dynamic symbol table */
1697 if (elf_dynsymtab (abfd) == shindex)
1700 if (hdr->sh_entsize != bed->s->sizeof_sym)
1702 BFD_ASSERT (elf_dynsymtab (abfd) == 0);
1703 elf_dynsymtab (abfd) = shindex;
1704 elf_tdata (abfd)->dynsymtab_hdr = *hdr;
1705 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->dynsymtab_hdr;
1706 abfd->flags |= HAS_SYMS;
1708 /* Besides being a symbol table, we also treat this as a regular
1709 section, so that objcopy can handle it. */
1710 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1712 case SHT_SYMTAB_SHNDX: /* Symbol section indices when >64k sections */
1713 if (elf_symtab_shndx (abfd) == shindex)
1716 BFD_ASSERT (elf_symtab_shndx (abfd) == 0);
1717 elf_symtab_shndx (abfd) = shindex;
1718 elf_tdata (abfd)->symtab_shndx_hdr = *hdr;
1719 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->symtab_shndx_hdr;
1722 case SHT_STRTAB: /* A string table */
1723 if (hdr->bfd_section != NULL)
1725 if (ehdr->e_shstrndx == shindex)
1727 elf_tdata (abfd)->shstrtab_hdr = *hdr;
1728 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->shstrtab_hdr;
1731 if (elf_elfsections (abfd)[elf_onesymtab (abfd)]->sh_link == shindex)
1734 elf_tdata (abfd)->strtab_hdr = *hdr;
1735 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->strtab_hdr;
1738 if (elf_elfsections (abfd)[elf_dynsymtab (abfd)]->sh_link == shindex)
1741 elf_tdata (abfd)->dynstrtab_hdr = *hdr;
1742 hdr = &elf_tdata (abfd)->dynstrtab_hdr;
1743 elf_elfsections (abfd)[shindex] = hdr;
1744 /* We also treat this as a regular section, so that objcopy
1746 return _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1750 /* If the string table isn't one of the above, then treat it as a
1751 regular section. We need to scan all the headers to be sure,
1752 just in case this strtab section appeared before the above. */
1753 if (elf_onesymtab (abfd) == 0 || elf_dynsymtab (abfd) == 0)
1755 unsigned int i, num_sec;
1757 num_sec = elf_numsections (abfd);
1758 for (i = 1; i < num_sec; i++)
1760 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1761 if (hdr2->sh_link == shindex)
1763 /* Prevent endless recursion on broken objects. */
1766 if (! bfd_section_from_shdr (abfd, i))
1768 if (elf_onesymtab (abfd) == i)
1770 if (elf_dynsymtab (abfd) == i)
1771 goto dynsymtab_strtab;
1775 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1779 /* *These* do a lot of work -- but build no sections! */
1781 asection *target_sect;
1782 Elf_Internal_Shdr *hdr2, **p_hdr;
1783 unsigned int num_sec = elf_numsections (abfd);
1784 struct bfd_elf_section_data *esdt;
1788 != (bfd_size_type) (hdr->sh_type == SHT_REL
1789 ? bed->s->sizeof_rel : bed->s->sizeof_rela))
1792 /* Check for a bogus link to avoid crashing. */
1793 if (hdr->sh_link >= num_sec)
1795 ((*_bfd_error_handler)
1796 (_("%B: invalid link %lu for reloc section %s (index %u)"),
1797 abfd, hdr->sh_link, name, shindex));
1798 return _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1802 /* For some incomprehensible reason Oracle distributes
1803 libraries for Solaris in which some of the objects have
1804 bogus sh_link fields. It would be nice if we could just
1805 reject them, but, unfortunately, some people need to use
1806 them. We scan through the section headers; if we find only
1807 one suitable symbol table, we clobber the sh_link to point
1808 to it. I hope this doesn't break anything.
1810 Don't do it on executable nor shared library. */
1811 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0
1812 && elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_SYMTAB
1813 && elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_DYNSYM)
1819 for (scan = 1; scan < num_sec; scan++)
1821 if (elf_elfsections (abfd)[scan]->sh_type == SHT_SYMTAB
1822 || elf_elfsections (abfd)[scan]->sh_type == SHT_DYNSYM)
1833 hdr->sh_link = found;
1836 /* Get the symbol table. */
1837 if ((elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_SYMTAB
1838 || elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_DYNSYM)
1839 && ! bfd_section_from_shdr (abfd, hdr->sh_link))
1842 /* If this reloc section does not use the main symbol table we
1843 don't treat it as a reloc section. BFD can't adequately
1844 represent such a section, so at least for now, we don't
1845 try. We just present it as a normal section. We also
1846 can't use it as a reloc section if it points to the null
1847 section, an invalid section, another reloc section, or its
1848 sh_link points to the null section. */
1849 if (hdr->sh_link != elf_onesymtab (abfd)
1850 || hdr->sh_link == SHN_UNDEF
1851 || hdr->sh_info == SHN_UNDEF
1852 || hdr->sh_info >= num_sec
1853 || elf_elfsections (abfd)[hdr->sh_info]->sh_type == SHT_REL
1854 || elf_elfsections (abfd)[hdr->sh_info]->sh_type == SHT_RELA)
1855 return _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1858 if (! bfd_section_from_shdr (abfd, hdr->sh_info))
1860 target_sect = bfd_section_from_elf_index (abfd, hdr->sh_info);
1861 if (target_sect == NULL)
1864 esdt = elf_section_data (target_sect);
1865 if (hdr->sh_type == SHT_RELA)
1866 p_hdr = &esdt->rela.hdr;
1868 p_hdr = &esdt->rel.hdr;
1870 BFD_ASSERT (*p_hdr == NULL);
1871 amt = sizeof (*hdr2);
1872 hdr2 = (Elf_Internal_Shdr *) bfd_alloc (abfd, amt);
1877 elf_elfsections (abfd)[shindex] = hdr2;
1878 target_sect->reloc_count += NUM_SHDR_ENTRIES (hdr);
1879 target_sect->flags |= SEC_RELOC;
1880 target_sect->relocation = NULL;
1881 target_sect->rel_filepos = hdr->sh_offset;
1882 /* In the section to which the relocations apply, mark whether
1883 its relocations are of the REL or RELA variety. */
1884 if (hdr->sh_size != 0)
1886 if (hdr->sh_type == SHT_RELA)
1887 target_sect->use_rela_p = 1;
1889 abfd->flags |= HAS_RELOC;
1893 case SHT_GNU_verdef:
1894 elf_dynverdef (abfd) = shindex;
1895 elf_tdata (abfd)->dynverdef_hdr = *hdr;
1896 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1898 case SHT_GNU_versym:
1899 if (hdr->sh_entsize != sizeof (Elf_External_Versym))
1901 elf_dynversym (abfd) = shindex;
1902 elf_tdata (abfd)->dynversym_hdr = *hdr;
1903 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1905 case SHT_GNU_verneed:
1906 elf_dynverref (abfd) = shindex;
1907 elf_tdata (abfd)->dynverref_hdr = *hdr;
1908 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1914 if (! IS_VALID_GROUP_SECTION_HEADER (hdr))
1916 if (!_bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1918 if (hdr->contents != NULL)
1920 Elf_Internal_Group *idx = (Elf_Internal_Group *) hdr->contents;
1921 unsigned int n_elt = hdr->sh_size / GRP_ENTRY_SIZE;
1924 if (idx->flags & GRP_COMDAT)
1925 hdr->bfd_section->flags
1926 |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
1928 /* We try to keep the same section order as it comes in. */
1930 while (--n_elt != 0)
1934 if (idx->shdr != NULL
1935 && (s = idx->shdr->bfd_section) != NULL
1936 && elf_next_in_group (s) != NULL)
1938 elf_next_in_group (hdr->bfd_section) = s;
1946 /* Possibly an attributes section. */
1947 if (hdr->sh_type == SHT_GNU_ATTRIBUTES
1948 || hdr->sh_type == bed->obj_attrs_section_type)
1950 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1952 _bfd_elf_parse_attributes (abfd, hdr);
1956 /* Check for any processor-specific section types. */
1957 if (bed->elf_backend_section_from_shdr (abfd, hdr, name, shindex))
1960 if (hdr->sh_type >= SHT_LOUSER && hdr->sh_type <= SHT_HIUSER)
1962 if ((hdr->sh_flags & SHF_ALLOC) != 0)
1963 /* FIXME: How to properly handle allocated section reserved
1964 for applications? */
1965 (*_bfd_error_handler)
1966 (_("%B: don't know how to handle allocated, application "
1967 "specific section `%s' [0x%8x]"),
1968 abfd, name, hdr->sh_type);
1970 /* Allow sections reserved for applications. */
1971 return _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1974 else if (hdr->sh_type >= SHT_LOPROC
1975 && hdr->sh_type <= SHT_HIPROC)
1976 /* FIXME: We should handle this section. */
1977 (*_bfd_error_handler)
1978 (_("%B: don't know how to handle processor specific section "
1980 abfd, name, hdr->sh_type);
1981 else if (hdr->sh_type >= SHT_LOOS && hdr->sh_type <= SHT_HIOS)
1983 /* Unrecognised OS-specific sections. */
1984 if ((hdr->sh_flags & SHF_OS_NONCONFORMING) != 0)
1985 /* SHF_OS_NONCONFORMING indicates that special knowledge is
1986 required to correctly process the section and the file should
1987 be rejected with an error message. */
1988 (*_bfd_error_handler)
1989 (_("%B: don't know how to handle OS specific section "
1991 abfd, name, hdr->sh_type);
1993 /* Otherwise it should be processed. */
1994 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1997 /* FIXME: We should handle this section. */
1998 (*_bfd_error_handler)
1999 (_("%B: don't know how to handle section `%s' [0x%8x]"),
2000 abfd, name, hdr->sh_type);
2008 /* Return the local symbol specified by ABFD, R_SYMNDX. */
2011 bfd_sym_from_r_symndx (struct sym_cache *cache,
2013 unsigned long r_symndx)
2015 unsigned int ent = r_symndx % LOCAL_SYM_CACHE_SIZE;
2017 if (cache->abfd != abfd || cache->indx[ent] != r_symndx)
2019 Elf_Internal_Shdr *symtab_hdr;
2020 unsigned char esym[sizeof (Elf64_External_Sym)];
2021 Elf_External_Sym_Shndx eshndx;
2023 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2024 if (bfd_elf_get_elf_syms (abfd, symtab_hdr, 1, r_symndx,
2025 &cache->sym[ent], esym, &eshndx) == NULL)
2028 if (cache->abfd != abfd)
2030 memset (cache->indx, -1, sizeof (cache->indx));
2033 cache->indx[ent] = r_symndx;
2036 return &cache->sym[ent];
2039 /* Given an ELF section number, retrieve the corresponding BFD
2043 bfd_section_from_elf_index (bfd *abfd, unsigned int sec_index)
2045 if (sec_index >= elf_numsections (abfd))
2047 return elf_elfsections (abfd)[sec_index]->bfd_section;
2050 static const struct bfd_elf_special_section special_sections_b[] =
2052 { STRING_COMMA_LEN (".bss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2053 { NULL, 0, 0, 0, 0 }
2056 static const struct bfd_elf_special_section special_sections_c[] =
2058 { STRING_COMMA_LEN (".comment"), 0, SHT_PROGBITS, 0 },
2059 { NULL, 0, 0, 0, 0 }
2062 static const struct bfd_elf_special_section special_sections_d[] =
2064 { STRING_COMMA_LEN (".data"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2065 { STRING_COMMA_LEN (".data1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2066 { STRING_COMMA_LEN (".debug"), 0, SHT_PROGBITS, 0 },
2067 { STRING_COMMA_LEN (".debug_line"), 0, SHT_PROGBITS, 0 },
2068 { STRING_COMMA_LEN (".debug_info"), 0, SHT_PROGBITS, 0 },
2069 { STRING_COMMA_LEN (".debug_abbrev"), 0, SHT_PROGBITS, 0 },
2070 { STRING_COMMA_LEN (".debug_aranges"), 0, SHT_PROGBITS, 0 },
2071 { STRING_COMMA_LEN (".dynamic"), 0, SHT_DYNAMIC, SHF_ALLOC },
2072 { STRING_COMMA_LEN (".dynstr"), 0, SHT_STRTAB, SHF_ALLOC },
2073 { STRING_COMMA_LEN (".dynsym"), 0, SHT_DYNSYM, SHF_ALLOC },
2074 { NULL, 0, 0, 0, 0 }
2077 static const struct bfd_elf_special_section special_sections_f[] =
2079 { STRING_COMMA_LEN (".fini"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2080 { STRING_COMMA_LEN (".fini_array"), 0, SHT_FINI_ARRAY, SHF_ALLOC + SHF_WRITE },
2081 { NULL, 0, 0, 0, 0 }
2084 static const struct bfd_elf_special_section special_sections_g[] =
2086 { STRING_COMMA_LEN (".gnu.linkonce.b"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2087 { STRING_COMMA_LEN (".gnu.lto_"), -1, SHT_PROGBITS, SHF_EXCLUDE },
2088 { STRING_COMMA_LEN (".got"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2089 { STRING_COMMA_LEN (".gnu.version"), 0, SHT_GNU_versym, 0 },
2090 { STRING_COMMA_LEN (".gnu.version_d"), 0, SHT_GNU_verdef, 0 },
2091 { STRING_COMMA_LEN (".gnu.version_r"), 0, SHT_GNU_verneed, 0 },
2092 { STRING_COMMA_LEN (".gnu.liblist"), 0, SHT_GNU_LIBLIST, SHF_ALLOC },
2093 { STRING_COMMA_LEN (".gnu.conflict"), 0, SHT_RELA, SHF_ALLOC },
2094 { STRING_COMMA_LEN (".gnu.hash"), 0, SHT_GNU_HASH, SHF_ALLOC },
2095 { NULL, 0, 0, 0, 0 }
2098 static const struct bfd_elf_special_section special_sections_h[] =
2100 { STRING_COMMA_LEN (".hash"), 0, SHT_HASH, SHF_ALLOC },
2101 { NULL, 0, 0, 0, 0 }
2104 static const struct bfd_elf_special_section special_sections_i[] =
2106 { STRING_COMMA_LEN (".init"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2107 { STRING_COMMA_LEN (".init_array"), 0, SHT_INIT_ARRAY, SHF_ALLOC + SHF_WRITE },
2108 { STRING_COMMA_LEN (".interp"), 0, SHT_PROGBITS, 0 },
2109 { NULL, 0, 0, 0, 0 }
2112 static const struct bfd_elf_special_section special_sections_l[] =
2114 { STRING_COMMA_LEN (".line"), 0, SHT_PROGBITS, 0 },
2115 { NULL, 0, 0, 0, 0 }
2118 static const struct bfd_elf_special_section special_sections_n[] =
2120 { STRING_COMMA_LEN (".note.GNU-stack"), 0, SHT_PROGBITS, 0 },
2121 { STRING_COMMA_LEN (".note"), -1, SHT_NOTE, 0 },
2122 { NULL, 0, 0, 0, 0 }
2125 static const struct bfd_elf_special_section special_sections_p[] =
2127 { STRING_COMMA_LEN (".preinit_array"), 0, SHT_PREINIT_ARRAY, SHF_ALLOC + SHF_WRITE },
2128 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2129 { NULL, 0, 0, 0, 0 }
2132 static const struct bfd_elf_special_section special_sections_r[] =
2134 { STRING_COMMA_LEN (".rodata"), -2, SHT_PROGBITS, SHF_ALLOC },
2135 { STRING_COMMA_LEN (".rodata1"), 0, SHT_PROGBITS, SHF_ALLOC },
2136 { STRING_COMMA_LEN (".rela"), -1, SHT_RELA, 0 },
2137 { STRING_COMMA_LEN (".rel"), -1, SHT_REL, 0 },
2138 { NULL, 0, 0, 0, 0 }
2141 static const struct bfd_elf_special_section special_sections_s[] =
2143 { STRING_COMMA_LEN (".shstrtab"), 0, SHT_STRTAB, 0 },
2144 { STRING_COMMA_LEN (".strtab"), 0, SHT_STRTAB, 0 },
2145 { STRING_COMMA_LEN (".symtab"), 0, SHT_SYMTAB, 0 },
2146 /* See struct bfd_elf_special_section declaration for the semantics of
2147 this special case where .prefix_length != strlen (.prefix). */
2148 { ".stabstr", 5, 3, SHT_STRTAB, 0 },
2149 { NULL, 0, 0, 0, 0 }
2152 static const struct bfd_elf_special_section special_sections_t[] =
2154 { STRING_COMMA_LEN (".text"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2155 { STRING_COMMA_LEN (".tbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
2156 { STRING_COMMA_LEN (".tdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
2157 { NULL, 0, 0, 0, 0 }
2160 static const struct bfd_elf_special_section special_sections_z[] =
2162 { STRING_COMMA_LEN (".zdebug_line"), 0, SHT_PROGBITS, 0 },
2163 { STRING_COMMA_LEN (".zdebug_info"), 0, SHT_PROGBITS, 0 },
2164 { STRING_COMMA_LEN (".zdebug_abbrev"), 0, SHT_PROGBITS, 0 },
2165 { STRING_COMMA_LEN (".zdebug_aranges"), 0, SHT_PROGBITS, 0 },
2166 { NULL, 0, 0, 0, 0 }
2169 static const struct bfd_elf_special_section *special_sections[] =
2171 special_sections_b, /* 'b' */
2172 special_sections_c, /* 'c' */
2173 special_sections_d, /* 'd' */
2175 special_sections_f, /* 'f' */
2176 special_sections_g, /* 'g' */
2177 special_sections_h, /* 'h' */
2178 special_sections_i, /* 'i' */
2181 special_sections_l, /* 'l' */
2183 special_sections_n, /* 'n' */
2185 special_sections_p, /* 'p' */
2187 special_sections_r, /* 'r' */
2188 special_sections_s, /* 's' */
2189 special_sections_t, /* 't' */
2195 special_sections_z /* 'z' */
2198 const struct bfd_elf_special_section *
2199 _bfd_elf_get_special_section (const char *name,
2200 const struct bfd_elf_special_section *spec,
2206 len = strlen (name);
2208 for (i = 0; spec[i].prefix != NULL; i++)
2211 int prefix_len = spec[i].prefix_length;
2213 if (len < prefix_len)
2215 if (memcmp (name, spec[i].prefix, prefix_len) != 0)
2218 suffix_len = spec[i].suffix_length;
2219 if (suffix_len <= 0)
2221 if (name[prefix_len] != 0)
2223 if (suffix_len == 0)
2225 if (name[prefix_len] != '.'
2226 && (suffix_len == -2
2227 || (rela && spec[i].type == SHT_REL)))
2233 if (len < prefix_len + suffix_len)
2235 if (memcmp (name + len - suffix_len,
2236 spec[i].prefix + prefix_len,
2246 const struct bfd_elf_special_section *
2247 _bfd_elf_get_sec_type_attr (bfd *abfd, asection *sec)
2250 const struct bfd_elf_special_section *spec;
2251 const struct elf_backend_data *bed;
2253 /* See if this is one of the special sections. */
2254 if (sec->name == NULL)
2257 bed = get_elf_backend_data (abfd);
2258 spec = bed->special_sections;
2261 spec = _bfd_elf_get_special_section (sec->name,
2262 bed->special_sections,
2268 if (sec->name[0] != '.')
2271 i = sec->name[1] - 'b';
2272 if (i < 0 || i > 'z' - 'b')
2275 spec = special_sections[i];
2280 return _bfd_elf_get_special_section (sec->name, spec, sec->use_rela_p);
2284 _bfd_elf_new_section_hook (bfd *abfd, asection *sec)
2286 struct bfd_elf_section_data *sdata;
2287 const struct elf_backend_data *bed;
2288 const struct bfd_elf_special_section *ssect;
2290 sdata = (struct bfd_elf_section_data *) sec->used_by_bfd;
2293 sdata = (struct bfd_elf_section_data *) bfd_zalloc (abfd,
2297 sec->used_by_bfd = sdata;
2300 /* Indicate whether or not this section should use RELA relocations. */
2301 bed = get_elf_backend_data (abfd);
2302 sec->use_rela_p = bed->default_use_rela_p;
2304 /* When we read a file, we don't need to set ELF section type and
2305 flags. They will be overridden in _bfd_elf_make_section_from_shdr
2306 anyway. We will set ELF section type and flags for all linker
2307 created sections. If user specifies BFD section flags, we will
2308 set ELF section type and flags based on BFD section flags in
2309 elf_fake_sections. */
2310 if ((!sec->flags && abfd->direction != read_direction)
2311 || (sec->flags & SEC_LINKER_CREATED) != 0)
2313 ssect = (*bed->get_sec_type_attr) (abfd, sec);
2316 elf_section_type (sec) = ssect->type;
2317 elf_section_flags (sec) = ssect->attr;
2321 return _bfd_generic_new_section_hook (abfd, sec);
2324 /* Create a new bfd section from an ELF program header.
2326 Since program segments have no names, we generate a synthetic name
2327 of the form segment<NUM>, where NUM is generally the index in the
2328 program header table. For segments that are split (see below) we
2329 generate the names segment<NUM>a and segment<NUM>b.
2331 Note that some program segments may have a file size that is different than
2332 (less than) the memory size. All this means is that at execution the
2333 system must allocate the amount of memory specified by the memory size,
2334 but only initialize it with the first "file size" bytes read from the
2335 file. This would occur for example, with program segments consisting
2336 of combined data+bss.
2338 To handle the above situation, this routine generates TWO bfd sections
2339 for the single program segment. The first has the length specified by
2340 the file size of the segment, and the second has the length specified
2341 by the difference between the two sizes. In effect, the segment is split
2342 into its initialized and uninitialized parts.
2347 _bfd_elf_make_section_from_phdr (bfd *abfd,
2348 Elf_Internal_Phdr *hdr,
2350 const char *type_name)
2358 split = ((hdr->p_memsz > 0)
2359 && (hdr->p_filesz > 0)
2360 && (hdr->p_memsz > hdr->p_filesz));
2362 if (hdr->p_filesz > 0)
2364 sprintf (namebuf, "%s%d%s", type_name, hdr_index, split ? "a" : "");
2365 len = strlen (namebuf) + 1;
2366 name = (char *) bfd_alloc (abfd, len);
2369 memcpy (name, namebuf, len);
2370 newsect = bfd_make_section (abfd, name);
2371 if (newsect == NULL)
2373 newsect->vma = hdr->p_vaddr;
2374 newsect->lma = hdr->p_paddr;
2375 newsect->size = hdr->p_filesz;
2376 newsect->filepos = hdr->p_offset;
2377 newsect->flags |= SEC_HAS_CONTENTS;
2378 newsect->alignment_power = bfd_log2 (hdr->p_align);
2379 if (hdr->p_type == PT_LOAD)
2381 newsect->flags |= SEC_ALLOC;
2382 newsect->flags |= SEC_LOAD;
2383 if (hdr->p_flags & PF_X)
2385 /* FIXME: all we known is that it has execute PERMISSION,
2387 newsect->flags |= SEC_CODE;
2390 if (!(hdr->p_flags & PF_W))
2392 newsect->flags |= SEC_READONLY;
2396 if (hdr->p_memsz > hdr->p_filesz)
2400 sprintf (namebuf, "%s%d%s", type_name, hdr_index, split ? "b" : "");
2401 len = strlen (namebuf) + 1;
2402 name = (char *) bfd_alloc (abfd, len);
2405 memcpy (name, namebuf, len);
2406 newsect = bfd_make_section (abfd, name);
2407 if (newsect == NULL)
2409 newsect->vma = hdr->p_vaddr + hdr->p_filesz;
2410 newsect->lma = hdr->p_paddr + hdr->p_filesz;
2411 newsect->size = hdr->p_memsz - hdr->p_filesz;
2412 newsect->filepos = hdr->p_offset + hdr->p_filesz;
2413 align = newsect->vma & -newsect->vma;
2414 if (align == 0 || align > hdr->p_align)
2415 align = hdr->p_align;
2416 newsect->alignment_power = bfd_log2 (align);
2417 if (hdr->p_type == PT_LOAD)
2419 /* Hack for gdb. Segments that have not been modified do
2420 not have their contents written to a core file, on the
2421 assumption that a debugger can find the contents in the
2422 executable. We flag this case by setting the fake
2423 section size to zero. Note that "real" bss sections will
2424 always have their contents dumped to the core file. */
2425 if (bfd_get_format (abfd) == bfd_core)
2427 newsect->flags |= SEC_ALLOC;
2428 if (hdr->p_flags & PF_X)
2429 newsect->flags |= SEC_CODE;
2431 if (!(hdr->p_flags & PF_W))
2432 newsect->flags |= SEC_READONLY;
2439 bfd_section_from_phdr (bfd *abfd, Elf_Internal_Phdr *hdr, int hdr_index)
2441 const struct elf_backend_data *bed;
2443 switch (hdr->p_type)
2446 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "null");
2449 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "load");
2452 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "dynamic");
2455 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "interp");
2458 if (! _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "note"))
2460 if (! elf_read_notes (abfd, hdr->p_offset, hdr->p_filesz))
2465 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "shlib");
2468 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "phdr");
2470 case PT_GNU_EH_FRAME:
2471 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index,
2475 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "stack");
2478 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "relro");
2481 /* Check for any processor-specific program segment types. */
2482 bed = get_elf_backend_data (abfd);
2483 return bed->elf_backend_section_from_phdr (abfd, hdr, hdr_index, "proc");
2487 /* Return the REL_HDR for SEC, assuming there is only a single one, either
2491 _bfd_elf_single_rel_hdr (asection *sec)
2493 if (elf_section_data (sec)->rel.hdr)
2495 BFD_ASSERT (elf_section_data (sec)->rela.hdr == NULL);
2496 return elf_section_data (sec)->rel.hdr;
2499 return elf_section_data (sec)->rela.hdr;
2502 /* Allocate and initialize a section-header for a new reloc section,
2503 containing relocations against ASECT. It is stored in RELDATA. If
2504 USE_RELA_P is TRUE, we use RELA relocations; otherwise, we use REL
2508 _bfd_elf_init_reloc_shdr (bfd *abfd,
2509 struct bfd_elf_section_reloc_data *reldata,
2511 bfd_boolean use_rela_p)
2513 Elf_Internal_Shdr *rel_hdr;
2515 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2518 amt = sizeof (Elf_Internal_Shdr);
2519 BFD_ASSERT (reldata->hdr == NULL);
2520 rel_hdr = bfd_zalloc (abfd, amt);
2521 reldata->hdr = rel_hdr;
2523 amt = sizeof ".rela" + strlen (asect->name);
2524 name = (char *) bfd_alloc (abfd, amt);
2527 sprintf (name, "%s%s", use_rela_p ? ".rela" : ".rel", asect->name);
2529 (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd), name,
2531 if (rel_hdr->sh_name == (unsigned int) -1)
2533 rel_hdr->sh_type = use_rela_p ? SHT_RELA : SHT_REL;
2534 rel_hdr->sh_entsize = (use_rela_p
2535 ? bed->s->sizeof_rela
2536 : bed->s->sizeof_rel);
2537 rel_hdr->sh_addralign = (bfd_vma) 1 << bed->s->log_file_align;
2538 rel_hdr->sh_flags = 0;
2539 rel_hdr->sh_addr = 0;
2540 rel_hdr->sh_size = 0;
2541 rel_hdr->sh_offset = 0;
2546 /* Return the default section type based on the passed in section flags. */
2549 bfd_elf_get_default_section_type (flagword flags)
2551 if ((flags & SEC_ALLOC) != 0
2552 && (flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
2554 return SHT_PROGBITS;
2557 struct fake_section_arg
2559 struct bfd_link_info *link_info;
2563 /* Set up an ELF internal section header for a section. */
2566 elf_fake_sections (bfd *abfd, asection *asect, void *fsarg)
2568 struct fake_section_arg *arg = (struct fake_section_arg *)fsarg;
2569 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2570 struct bfd_elf_section_data *esd = elf_section_data (asect);
2571 Elf_Internal_Shdr *this_hdr;
2572 unsigned int sh_type;
2576 /* We already failed; just get out of the bfd_map_over_sections
2581 this_hdr = &esd->this_hdr;
2583 this_hdr->sh_name = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
2584 asect->name, FALSE);
2585 if (this_hdr->sh_name == (unsigned int) -1)
2591 /* Don't clear sh_flags. Assembler may set additional bits. */
2593 if ((asect->flags & SEC_ALLOC) != 0
2594 || asect->user_set_vma)
2595 this_hdr->sh_addr = asect->vma;
2597 this_hdr->sh_addr = 0;
2599 this_hdr->sh_offset = 0;
2600 this_hdr->sh_size = asect->size;
2601 this_hdr->sh_link = 0;
2602 this_hdr->sh_addralign = (bfd_vma) 1 << asect->alignment_power;
2603 /* The sh_entsize and sh_info fields may have been set already by
2604 copy_private_section_data. */
2606 this_hdr->bfd_section = asect;
2607 this_hdr->contents = NULL;
2609 /* If the section type is unspecified, we set it based on
2611 if ((asect->flags & SEC_GROUP) != 0)
2612 sh_type = SHT_GROUP;
2614 sh_type = bfd_elf_get_default_section_type (asect->flags);
2616 if (this_hdr->sh_type == SHT_NULL)
2617 this_hdr->sh_type = sh_type;
2618 else if (this_hdr->sh_type == SHT_NOBITS
2619 && sh_type == SHT_PROGBITS
2620 && (asect->flags & SEC_ALLOC) != 0)
2622 /* Warn if we are changing a NOBITS section to PROGBITS, but
2623 allow the link to proceed. This can happen when users link
2624 non-bss input sections to bss output sections, or emit data
2625 to a bss output section via a linker script. */
2626 (*_bfd_error_handler)
2627 (_("warning: section `%A' type changed to PROGBITS"), asect);
2628 this_hdr->sh_type = sh_type;
2631 switch (this_hdr->sh_type)
2637 case SHT_INIT_ARRAY:
2638 case SHT_FINI_ARRAY:
2639 case SHT_PREINIT_ARRAY:
2646 this_hdr->sh_entsize = bed->s->sizeof_hash_entry;
2650 this_hdr->sh_entsize = bed->s->sizeof_sym;
2654 this_hdr->sh_entsize = bed->s->sizeof_dyn;
2658 if (get_elf_backend_data (abfd)->may_use_rela_p)
2659 this_hdr->sh_entsize = bed->s->sizeof_rela;
2663 if (get_elf_backend_data (abfd)->may_use_rel_p)
2664 this_hdr->sh_entsize = bed->s->sizeof_rel;
2667 case SHT_GNU_versym:
2668 this_hdr->sh_entsize = sizeof (Elf_External_Versym);
2671 case SHT_GNU_verdef:
2672 this_hdr->sh_entsize = 0;
2673 /* objcopy or strip will copy over sh_info, but may not set
2674 cverdefs. The linker will set cverdefs, but sh_info will be
2676 if (this_hdr->sh_info == 0)
2677 this_hdr->sh_info = elf_tdata (abfd)->cverdefs;
2679 BFD_ASSERT (elf_tdata (abfd)->cverdefs == 0
2680 || this_hdr->sh_info == elf_tdata (abfd)->cverdefs);
2683 case SHT_GNU_verneed:
2684 this_hdr->sh_entsize = 0;
2685 /* objcopy or strip will copy over sh_info, but may not set
2686 cverrefs. The linker will set cverrefs, but sh_info will be
2688 if (this_hdr->sh_info == 0)
2689 this_hdr->sh_info = elf_tdata (abfd)->cverrefs;
2691 BFD_ASSERT (elf_tdata (abfd)->cverrefs == 0
2692 || this_hdr->sh_info == elf_tdata (abfd)->cverrefs);
2696 this_hdr->sh_entsize = GRP_ENTRY_SIZE;
2700 this_hdr->sh_entsize = bed->s->arch_size == 64 ? 0 : 4;
2704 if ((asect->flags & SEC_ALLOC) != 0)
2705 this_hdr->sh_flags |= SHF_ALLOC;
2706 if ((asect->flags & SEC_READONLY) == 0)
2707 this_hdr->sh_flags |= SHF_WRITE;
2708 if ((asect->flags & SEC_CODE) != 0)
2709 this_hdr->sh_flags |= SHF_EXECINSTR;
2710 if ((asect->flags & SEC_MERGE) != 0)
2712 this_hdr->sh_flags |= SHF_MERGE;
2713 this_hdr->sh_entsize = asect->entsize;
2714 if ((asect->flags & SEC_STRINGS) != 0)
2715 this_hdr->sh_flags |= SHF_STRINGS;
2717 if ((asect->flags & SEC_GROUP) == 0 && elf_group_name (asect) != NULL)
2718 this_hdr->sh_flags |= SHF_GROUP;
2719 if ((asect->flags & SEC_THREAD_LOCAL) != 0)
2721 this_hdr->sh_flags |= SHF_TLS;
2722 if (asect->size == 0
2723 && (asect->flags & SEC_HAS_CONTENTS) == 0)
2725 struct bfd_link_order *o = asect->map_tail.link_order;
2727 this_hdr->sh_size = 0;
2730 this_hdr->sh_size = o->offset + o->size;
2731 if (this_hdr->sh_size != 0)
2732 this_hdr->sh_type = SHT_NOBITS;
2736 if ((asect->flags & (SEC_GROUP | SEC_EXCLUDE)) == SEC_EXCLUDE)
2737 this_hdr->sh_flags |= SHF_EXCLUDE;
2739 /* If the section has relocs, set up a section header for the
2740 SHT_REL[A] section. If two relocation sections are required for
2741 this section, it is up to the processor-specific back-end to
2742 create the other. */
2743 if ((asect->flags & SEC_RELOC) != 0)
2745 /* When doing a relocatable link, create both REL and RELA sections if
2748 /* Do the normal setup if we wouldn't create any sections here. */
2749 && esd->rel.count + esd->rela.count > 0
2750 && (arg->link_info->relocatable || arg->link_info->emitrelocations))
2752 if (esd->rel.count && esd->rel.hdr == NULL
2753 && !_bfd_elf_init_reloc_shdr (abfd, &esd->rel, asect, FALSE))
2758 if (esd->rela.count && esd->rela.hdr == NULL
2759 && !_bfd_elf_init_reloc_shdr (abfd, &esd->rela, asect, TRUE))
2765 else if (!_bfd_elf_init_reloc_shdr (abfd,
2767 ? &esd->rela : &esd->rel),
2773 /* Check for processor-specific section types. */
2774 sh_type = this_hdr->sh_type;
2775 if (bed->elf_backend_fake_sections
2776 && !(*bed->elf_backend_fake_sections) (abfd, this_hdr, asect))
2779 if (sh_type == SHT_NOBITS && asect->size != 0)
2781 /* Don't change the header type from NOBITS if we are being
2782 called for objcopy --only-keep-debug. */
2783 this_hdr->sh_type = sh_type;
2787 /* Fill in the contents of a SHT_GROUP section. Called from
2788 _bfd_elf_compute_section_file_positions for gas, objcopy, and
2789 when ELF targets use the generic linker, ld. Called for ld -r
2790 from bfd_elf_final_link. */
2793 bfd_elf_set_group_contents (bfd *abfd, asection *sec, void *failedptrarg)
2795 bfd_boolean *failedptr = (bfd_boolean *) failedptrarg;
2796 asection *elt, *first;
2800 /* Ignore linker created group section. See elfNN_ia64_object_p in
2802 if (((sec->flags & (SEC_GROUP | SEC_LINKER_CREATED)) != SEC_GROUP)
2806 if (elf_section_data (sec)->this_hdr.sh_info == 0)
2808 unsigned long symindx = 0;
2810 /* elf_group_id will have been set up by objcopy and the
2812 if (elf_group_id (sec) != NULL)
2813 symindx = elf_group_id (sec)->udata.i;
2817 /* If called from the assembler, swap_out_syms will have set up
2818 elf_section_syms. */
2819 BFD_ASSERT (elf_section_syms (abfd) != NULL);
2820 symindx = elf_section_syms (abfd)[sec->index]->udata.i;
2822 elf_section_data (sec)->this_hdr.sh_info = symindx;
2824 else if (elf_section_data (sec)->this_hdr.sh_info == (unsigned int) -2)
2826 /* The ELF backend linker sets sh_info to -2 when the group
2827 signature symbol is global, and thus the index can't be
2828 set until all local symbols are output. */
2829 asection *igroup = elf_sec_group (elf_next_in_group (sec));
2830 struct bfd_elf_section_data *sec_data = elf_section_data (igroup);
2831 unsigned long symndx = sec_data->this_hdr.sh_info;
2832 unsigned long extsymoff = 0;
2833 struct elf_link_hash_entry *h;
2835 if (!elf_bad_symtab (igroup->owner))
2837 Elf_Internal_Shdr *symtab_hdr;
2839 symtab_hdr = &elf_tdata (igroup->owner)->symtab_hdr;
2840 extsymoff = symtab_hdr->sh_info;
2842 h = elf_sym_hashes (igroup->owner)[symndx - extsymoff];
2843 while (h->root.type == bfd_link_hash_indirect
2844 || h->root.type == bfd_link_hash_warning)
2845 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2847 elf_section_data (sec)->this_hdr.sh_info = h->indx;
2850 /* The contents won't be allocated for "ld -r" or objcopy. */
2852 if (sec->contents == NULL)
2855 sec->contents = (unsigned char *) bfd_alloc (abfd, sec->size);
2857 /* Arrange for the section to be written out. */
2858 elf_section_data (sec)->this_hdr.contents = sec->contents;
2859 if (sec->contents == NULL)
2866 loc = sec->contents + sec->size;
2868 /* Get the pointer to the first section in the group that gas
2869 squirreled away here. objcopy arranges for this to be set to the
2870 start of the input section group. */
2871 first = elt = elf_next_in_group (sec);
2873 /* First element is a flag word. Rest of section is elf section
2874 indices for all the sections of the group. Write them backwards
2875 just to keep the group in the same order as given in .section
2876 directives, not that it matters. */
2883 s = s->output_section;
2885 && !bfd_is_abs_section (s))
2887 unsigned int idx = elf_section_data (s)->this_idx;
2890 H_PUT_32 (abfd, idx, loc);
2892 elt = elf_next_in_group (elt);
2897 if ((loc -= 4) != sec->contents)
2900 H_PUT_32 (abfd, sec->flags & SEC_LINK_ONCE ? GRP_COMDAT : 0, loc);
2903 /* Assign all ELF section numbers. The dummy first section is handled here
2904 too. The link/info pointers for the standard section types are filled
2905 in here too, while we're at it. */
2908 assign_section_numbers (bfd *abfd, struct bfd_link_info *link_info)
2910 struct elf_obj_tdata *t = elf_tdata (abfd);
2912 unsigned int section_number, secn;
2913 Elf_Internal_Shdr **i_shdrp;
2914 struct bfd_elf_section_data *d;
2915 bfd_boolean need_symtab;
2919 _bfd_elf_strtab_clear_all_refs (elf_shstrtab (abfd));
2921 /* SHT_GROUP sections are in relocatable files only. */
2922 if (link_info == NULL || link_info->relocatable)
2924 /* Put SHT_GROUP sections first. */
2925 for (sec = abfd->sections; sec != NULL; sec = sec->next)
2927 d = elf_section_data (sec);
2929 if (d->this_hdr.sh_type == SHT_GROUP)
2931 if (sec->flags & SEC_LINKER_CREATED)
2933 /* Remove the linker created SHT_GROUP sections. */
2934 bfd_section_list_remove (abfd, sec);
2935 abfd->section_count--;
2938 d->this_idx = section_number++;
2943 for (sec = abfd->sections; sec; sec = sec->next)
2945 d = elf_section_data (sec);
2947 if (d->this_hdr.sh_type != SHT_GROUP)
2948 d->this_idx = section_number++;
2949 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->this_hdr.sh_name);
2952 d->rel.idx = section_number++;
2953 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rel.hdr->sh_name);
2960 d->rela.idx = section_number++;
2961 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rela.hdr->sh_name);
2967 t->shstrtab_section = section_number++;
2968 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->shstrtab_hdr.sh_name);
2969 elf_elfheader (abfd)->e_shstrndx = t->shstrtab_section;
2971 need_symtab = (bfd_get_symcount (abfd) > 0
2972 || (link_info == NULL
2973 && ((abfd->flags & (EXEC_P | DYNAMIC | HAS_RELOC))
2977 t->symtab_section = section_number++;
2978 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->symtab_hdr.sh_name);
2979 if (section_number > ((SHN_LORESERVE - 2) & 0xFFFF))
2981 t->symtab_shndx_section = section_number++;
2982 t->symtab_shndx_hdr.sh_name
2983 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
2984 ".symtab_shndx", FALSE);
2985 if (t->symtab_shndx_hdr.sh_name == (unsigned int) -1)
2988 t->strtab_section = section_number++;
2989 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->strtab_hdr.sh_name);
2992 _bfd_elf_strtab_finalize (elf_shstrtab (abfd));
2993 t->shstrtab_hdr.sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
2995 elf_numsections (abfd) = section_number;
2996 elf_elfheader (abfd)->e_shnum = section_number;
2998 /* Set up the list of section header pointers, in agreement with the
3000 i_shdrp = (Elf_Internal_Shdr **) bfd_zalloc2 (abfd, section_number,
3001 sizeof (Elf_Internal_Shdr *));
3002 if (i_shdrp == NULL)
3005 i_shdrp[0] = (Elf_Internal_Shdr *) bfd_zalloc (abfd,
3006 sizeof (Elf_Internal_Shdr));
3007 if (i_shdrp[0] == NULL)
3009 bfd_release (abfd, i_shdrp);
3013 elf_elfsections (abfd) = i_shdrp;
3015 i_shdrp[t->shstrtab_section] = &t->shstrtab_hdr;
3018 i_shdrp[t->symtab_section] = &t->symtab_hdr;
3019 if (elf_numsections (abfd) > (SHN_LORESERVE & 0xFFFF))
3021 i_shdrp[t->symtab_shndx_section] = &t->symtab_shndx_hdr;
3022 t->symtab_shndx_hdr.sh_link = t->symtab_section;
3024 i_shdrp[t->strtab_section] = &t->strtab_hdr;
3025 t->symtab_hdr.sh_link = t->strtab_section;
3028 for (sec = abfd->sections; sec; sec = sec->next)
3033 d = elf_section_data (sec);
3035 i_shdrp[d->this_idx] = &d->this_hdr;
3036 if (d->rel.idx != 0)
3037 i_shdrp[d->rel.idx] = d->rel.hdr;
3038 if (d->rela.idx != 0)
3039 i_shdrp[d->rela.idx] = d->rela.hdr;
3041 /* Fill in the sh_link and sh_info fields while we're at it. */
3043 /* sh_link of a reloc section is the section index of the symbol
3044 table. sh_info is the section index of the section to which
3045 the relocation entries apply. */
3046 if (d->rel.idx != 0)
3048 d->rel.hdr->sh_link = t->symtab_section;
3049 d->rel.hdr->sh_info = d->this_idx;
3051 if (d->rela.idx != 0)
3053 d->rela.hdr->sh_link = t->symtab_section;
3054 d->rela.hdr->sh_info = d->this_idx;
3057 /* We need to set up sh_link for SHF_LINK_ORDER. */
3058 if ((d->this_hdr.sh_flags & SHF_LINK_ORDER) != 0)
3060 s = elf_linked_to_section (sec);
3063 /* elf_linked_to_section points to the input section. */
3064 if (link_info != NULL)
3066 /* Check discarded linkonce section. */
3067 if (elf_discarded_section (s))
3070 (*_bfd_error_handler)
3071 (_("%B: sh_link of section `%A' points to discarded section `%A' of `%B'"),
3072 abfd, d->this_hdr.bfd_section,
3074 /* Point to the kept section if it has the same
3075 size as the discarded one. */
3076 kept = _bfd_elf_check_kept_section (s, link_info);
3079 bfd_set_error (bfd_error_bad_value);
3085 s = s->output_section;
3086 BFD_ASSERT (s != NULL);
3090 /* Handle objcopy. */
3091 if (s->output_section == NULL)
3093 (*_bfd_error_handler)
3094 (_("%B: sh_link of section `%A' points to removed section `%A' of `%B'"),
3095 abfd, d->this_hdr.bfd_section, s, s->owner);
3096 bfd_set_error (bfd_error_bad_value);
3099 s = s->output_section;
3101 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3106 The Intel C compiler generates SHT_IA_64_UNWIND with
3107 SHF_LINK_ORDER. But it doesn't set the sh_link or
3108 sh_info fields. Hence we could get the situation
3110 const struct elf_backend_data *bed
3111 = get_elf_backend_data (abfd);
3112 if (bed->link_order_error_handler)
3113 bed->link_order_error_handler
3114 (_("%B: warning: sh_link not set for section `%A'"),
3119 switch (d->this_hdr.sh_type)
3123 /* A reloc section which we are treating as a normal BFD
3124 section. sh_link is the section index of the symbol
3125 table. sh_info is the section index of the section to
3126 which the relocation entries apply. We assume that an
3127 allocated reloc section uses the dynamic symbol table.
3128 FIXME: How can we be sure? */
3129 s = bfd_get_section_by_name (abfd, ".dynsym");
3131 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3133 /* We look up the section the relocs apply to by name. */
3135 if (d->this_hdr.sh_type == SHT_REL)
3139 s = bfd_get_section_by_name (abfd, name);
3141 d->this_hdr.sh_info = elf_section_data (s)->this_idx;
3145 /* We assume that a section named .stab*str is a stabs
3146 string section. We look for a section with the same name
3147 but without the trailing ``str'', and set its sh_link
3148 field to point to this section. */
3149 if (CONST_STRNEQ (sec->name, ".stab")
3150 && strcmp (sec->name + strlen (sec->name) - 3, "str") == 0)
3155 len = strlen (sec->name);
3156 alc = (char *) bfd_malloc (len - 2);
3159 memcpy (alc, sec->name, len - 3);
3160 alc[len - 3] = '\0';
3161 s = bfd_get_section_by_name (abfd, alc);
3165 elf_section_data (s)->this_hdr.sh_link = d->this_idx;
3167 /* This is a .stab section. */
3168 if (elf_section_data (s)->this_hdr.sh_entsize == 0)
3169 elf_section_data (s)->this_hdr.sh_entsize
3170 = 4 + 2 * bfd_get_arch_size (abfd) / 8;
3177 case SHT_GNU_verneed:
3178 case SHT_GNU_verdef:
3179 /* sh_link is the section header index of the string table
3180 used for the dynamic entries, or the symbol table, or the
3182 s = bfd_get_section_by_name (abfd, ".dynstr");
3184 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3187 case SHT_GNU_LIBLIST:
3188 /* sh_link is the section header index of the prelink library
3189 list used for the dynamic entries, or the symbol table, or
3190 the version strings. */
3191 s = bfd_get_section_by_name (abfd, (sec->flags & SEC_ALLOC)
3192 ? ".dynstr" : ".gnu.libstr");
3194 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3199 case SHT_GNU_versym:
3200 /* sh_link is the section header index of the symbol table
3201 this hash table or version table is for. */
3202 s = bfd_get_section_by_name (abfd, ".dynsym");
3204 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3208 d->this_hdr.sh_link = t->symtab_section;
3212 for (secn = 1; secn < section_number; ++secn)
3213 if (i_shdrp[secn] == NULL)
3214 i_shdrp[secn] = i_shdrp[0];
3216 i_shdrp[secn]->sh_name = _bfd_elf_strtab_offset (elf_shstrtab (abfd),
3217 i_shdrp[secn]->sh_name);
3221 /* Map symbol from it's internal number to the external number, moving
3222 all local symbols to be at the head of the list. */
3225 sym_is_global (bfd *abfd, asymbol *sym)
3227 /* If the backend has a special mapping, use it. */
3228 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3229 if (bed->elf_backend_sym_is_global)
3230 return (*bed->elf_backend_sym_is_global) (abfd, sym);
3232 return ((sym->flags & (BSF_GLOBAL | BSF_WEAK | BSF_GNU_UNIQUE)) != 0
3233 || bfd_is_und_section (bfd_get_section (sym))
3234 || bfd_is_com_section (bfd_get_section (sym)));
3237 /* Don't output section symbols for sections that are not going to be
3241 ignore_section_sym (bfd *abfd, asymbol *sym)
3243 return ((sym->flags & BSF_SECTION_SYM) != 0
3244 && !(sym->section->owner == abfd
3245 || (sym->section->output_section->owner == abfd
3246 && sym->section->output_offset == 0)));
3250 elf_map_symbols (bfd *abfd)
3252 unsigned int symcount = bfd_get_symcount (abfd);
3253 asymbol **syms = bfd_get_outsymbols (abfd);
3254 asymbol **sect_syms;
3255 unsigned int num_locals = 0;
3256 unsigned int num_globals = 0;
3257 unsigned int num_locals2 = 0;
3258 unsigned int num_globals2 = 0;
3265 fprintf (stderr, "elf_map_symbols\n");
3269 for (asect = abfd->sections; asect; asect = asect->next)
3271 if (max_index < asect->index)
3272 max_index = asect->index;
3276 sect_syms = (asymbol **) bfd_zalloc2 (abfd, max_index, sizeof (asymbol *));
3277 if (sect_syms == NULL)
3279 elf_section_syms (abfd) = sect_syms;
3280 elf_num_section_syms (abfd) = max_index;
3282 /* Init sect_syms entries for any section symbols we have already
3283 decided to output. */
3284 for (idx = 0; idx < symcount; idx++)
3286 asymbol *sym = syms[idx];
3288 if ((sym->flags & BSF_SECTION_SYM) != 0
3290 && !ignore_section_sym (abfd, sym))
3292 asection *sec = sym->section;
3294 if (sec->owner != abfd)
3295 sec = sec->output_section;
3297 sect_syms[sec->index] = syms[idx];
3301 /* Classify all of the symbols. */
3302 for (idx = 0; idx < symcount; idx++)
3304 if (ignore_section_sym (abfd, syms[idx]))
3306 if (!sym_is_global (abfd, syms[idx]))
3312 /* We will be adding a section symbol for each normal BFD section. Most
3313 sections will already have a section symbol in outsymbols, but
3314 eg. SHT_GROUP sections will not, and we need the section symbol mapped
3315 at least in that case. */
3316 for (asect = abfd->sections; asect; asect = asect->next)
3318 if (sect_syms[asect->index] == NULL)
3320 if (!sym_is_global (abfd, asect->symbol))
3327 /* Now sort the symbols so the local symbols are first. */
3328 new_syms = (asymbol **) bfd_alloc2 (abfd, num_locals + num_globals,
3329 sizeof (asymbol *));
3331 if (new_syms == NULL)
3334 for (idx = 0; idx < symcount; idx++)
3336 asymbol *sym = syms[idx];
3339 if (ignore_section_sym (abfd, sym))
3341 if (!sym_is_global (abfd, sym))
3344 i = num_locals + num_globals2++;
3346 sym->udata.i = i + 1;
3348 for (asect = abfd->sections; asect; asect = asect->next)
3350 if (sect_syms[asect->index] == NULL)
3352 asymbol *sym = asect->symbol;
3355 sect_syms[asect->index] = sym;
3356 if (!sym_is_global (abfd, sym))
3359 i = num_locals + num_globals2++;
3361 sym->udata.i = i + 1;
3365 bfd_set_symtab (abfd, new_syms, num_locals + num_globals);
3367 elf_num_locals (abfd) = num_locals;
3368 elf_num_globals (abfd) = num_globals;
3372 /* Align to the maximum file alignment that could be required for any
3373 ELF data structure. */
3375 static inline file_ptr
3376 align_file_position (file_ptr off, int align)
3378 return (off + align - 1) & ~(align - 1);
3381 /* Assign a file position to a section, optionally aligning to the
3382 required section alignment. */
3385 _bfd_elf_assign_file_position_for_section (Elf_Internal_Shdr *i_shdrp,
3389 if (align && i_shdrp->sh_addralign > 1)
3390 offset = BFD_ALIGN (offset, i_shdrp->sh_addralign);
3391 i_shdrp->sh_offset = offset;
3392 if (i_shdrp->bfd_section != NULL)
3393 i_shdrp->bfd_section->filepos = offset;
3394 if (i_shdrp->sh_type != SHT_NOBITS)
3395 offset += i_shdrp->sh_size;
3399 /* Compute the file positions we are going to put the sections at, and
3400 otherwise prepare to begin writing out the ELF file. If LINK_INFO
3401 is not NULL, this is being called by the ELF backend linker. */
3404 _bfd_elf_compute_section_file_positions (bfd *abfd,
3405 struct bfd_link_info *link_info)
3407 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3408 struct fake_section_arg fsargs;
3410 struct bfd_strtab_hash *strtab = NULL;
3411 Elf_Internal_Shdr *shstrtab_hdr;
3412 bfd_boolean need_symtab;
3414 if (abfd->output_has_begun)
3417 /* Do any elf backend specific processing first. */
3418 if (bed->elf_backend_begin_write_processing)
3419 (*bed->elf_backend_begin_write_processing) (abfd, link_info);
3421 if (! prep_headers (abfd))
3424 /* Post process the headers if necessary. */
3425 if (bed->elf_backend_post_process_headers)
3426 (*bed->elf_backend_post_process_headers) (abfd, link_info);
3428 fsargs.failed = FALSE;
3429 fsargs.link_info = link_info;
3430 bfd_map_over_sections (abfd, elf_fake_sections, &fsargs);
3434 if (!assign_section_numbers (abfd, link_info))
3437 /* The backend linker builds symbol table information itself. */
3438 need_symtab = (link_info == NULL
3439 && (bfd_get_symcount (abfd) > 0
3440 || ((abfd->flags & (EXEC_P | DYNAMIC | HAS_RELOC))
3444 /* Non-zero if doing a relocatable link. */
3445 int relocatable_p = ! (abfd->flags & (EXEC_P | DYNAMIC));
3447 if (! swap_out_syms (abfd, &strtab, relocatable_p))
3452 if (link_info == NULL)
3454 bfd_map_over_sections (abfd, bfd_elf_set_group_contents, &failed);
3459 shstrtab_hdr = &elf_tdata (abfd)->shstrtab_hdr;
3460 /* sh_name was set in prep_headers. */
3461 shstrtab_hdr->sh_type = SHT_STRTAB;
3462 shstrtab_hdr->sh_flags = 0;
3463 shstrtab_hdr->sh_addr = 0;
3464 shstrtab_hdr->sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
3465 shstrtab_hdr->sh_entsize = 0;
3466 shstrtab_hdr->sh_link = 0;
3467 shstrtab_hdr->sh_info = 0;
3468 /* sh_offset is set in assign_file_positions_except_relocs. */
3469 shstrtab_hdr->sh_addralign = 1;
3471 if (!assign_file_positions_except_relocs (abfd, link_info))
3477 Elf_Internal_Shdr *hdr;
3479 off = elf_tdata (abfd)->next_file_pos;
3481 hdr = &elf_tdata (abfd)->symtab_hdr;
3482 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3484 hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
3485 if (hdr->sh_size != 0)
3486 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3488 hdr = &elf_tdata (abfd)->strtab_hdr;
3489 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3491 elf_tdata (abfd)->next_file_pos = off;
3493 /* Now that we know where the .strtab section goes, write it
3495 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
3496 || ! _bfd_stringtab_emit (abfd, strtab))
3498 _bfd_stringtab_free (strtab);
3501 abfd->output_has_begun = TRUE;
3506 /* Make an initial estimate of the size of the program header. If we
3507 get the number wrong here, we'll redo section placement. */
3509 static bfd_size_type
3510 get_program_header_size (bfd *abfd, struct bfd_link_info *info)
3514 const struct elf_backend_data *bed;
3516 /* Assume we will need exactly two PT_LOAD segments: one for text
3517 and one for data. */
3520 s = bfd_get_section_by_name (abfd, ".interp");
3521 if (s != NULL && (s->flags & SEC_LOAD) != 0)
3523 /* If we have a loadable interpreter section, we need a
3524 PT_INTERP segment. In this case, assume we also need a
3525 PT_PHDR segment, although that may not be true for all
3530 if (bfd_get_section_by_name (abfd, ".dynamic") != NULL)
3532 /* We need a PT_DYNAMIC segment. */
3536 if (info != NULL && info->relro)
3538 /* We need a PT_GNU_RELRO segment. */
3542 if (elf_tdata (abfd)->eh_frame_hdr)
3544 /* We need a PT_GNU_EH_FRAME segment. */
3548 if (elf_tdata (abfd)->stack_flags)
3550 /* We need a PT_GNU_STACK segment. */
3554 for (s = abfd->sections; s != NULL; s = s->next)
3556 if ((s->flags & SEC_LOAD) != 0
3557 && CONST_STRNEQ (s->name, ".note"))
3559 /* We need a PT_NOTE segment. */
3561 /* Try to create just one PT_NOTE segment
3562 for all adjacent loadable .note* sections.
3563 gABI requires that within a PT_NOTE segment
3564 (and also inside of each SHT_NOTE section)
3565 each note is padded to a multiple of 4 size,
3566 so we check whether the sections are correctly
3568 if (s->alignment_power == 2)
3569 while (s->next != NULL
3570 && s->next->alignment_power == 2
3571 && (s->next->flags & SEC_LOAD) != 0
3572 && CONST_STRNEQ (s->next->name, ".note"))
3577 for (s = abfd->sections; s != NULL; s = s->next)
3579 if (s->flags & SEC_THREAD_LOCAL)
3581 /* We need a PT_TLS segment. */
3587 /* Let the backend count up any program headers it might need. */
3588 bed = get_elf_backend_data (abfd);
3589 if (bed->elf_backend_additional_program_headers)
3593 a = (*bed->elf_backend_additional_program_headers) (abfd, info);
3599 return segs * bed->s->sizeof_phdr;
3602 /* Find the segment that contains the output_section of section. */
3605 _bfd_elf_find_segment_containing_section (bfd * abfd, asection * section)
3607 struct elf_segment_map *m;
3608 Elf_Internal_Phdr *p;
3610 for (m = elf_tdata (abfd)->segment_map,
3611 p = elf_tdata (abfd)->phdr;
3617 for (i = m->count - 1; i >= 0; i--)
3618 if (m->sections[i] == section)
3625 /* Create a mapping from a set of sections to a program segment. */
3627 static struct elf_segment_map *
3628 make_mapping (bfd *abfd,
3629 asection **sections,
3634 struct elf_segment_map *m;
3639 amt = sizeof (struct elf_segment_map);
3640 amt += (to - from - 1) * sizeof (asection *);
3641 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3645 m->p_type = PT_LOAD;
3646 for (i = from, hdrpp = sections + from; i < to; i++, hdrpp++)
3647 m->sections[i - from] = *hdrpp;
3648 m->count = to - from;
3650 if (from == 0 && phdr)
3652 /* Include the headers in the first PT_LOAD segment. */
3653 m->includes_filehdr = 1;
3654 m->includes_phdrs = 1;
3660 /* Create the PT_DYNAMIC segment, which includes DYNSEC. Returns NULL
3663 struct elf_segment_map *
3664 _bfd_elf_make_dynamic_segment (bfd *abfd, asection *dynsec)
3666 struct elf_segment_map *m;
3668 m = (struct elf_segment_map *) bfd_zalloc (abfd,
3669 sizeof (struct elf_segment_map));
3673 m->p_type = PT_DYNAMIC;
3675 m->sections[0] = dynsec;
3680 /* Possibly add or remove segments from the segment map. */
3683 elf_modify_segment_map (bfd *abfd,
3684 struct bfd_link_info *info,
3685 bfd_boolean remove_empty_load)
3687 struct elf_segment_map **m;
3688 const struct elf_backend_data *bed;
3690 /* The placement algorithm assumes that non allocated sections are
3691 not in PT_LOAD segments. We ensure this here by removing such
3692 sections from the segment map. We also remove excluded
3693 sections. Finally, any PT_LOAD segment without sections is
3695 m = &elf_tdata (abfd)->segment_map;
3698 unsigned int i, new_count;
3700 for (new_count = 0, i = 0; i < (*m)->count; i++)
3702 if (((*m)->sections[i]->flags & SEC_EXCLUDE) == 0
3703 && (((*m)->sections[i]->flags & SEC_ALLOC) != 0
3704 || (*m)->p_type != PT_LOAD))
3706 (*m)->sections[new_count] = (*m)->sections[i];
3710 (*m)->count = new_count;
3712 if (remove_empty_load && (*m)->p_type == PT_LOAD && (*m)->count == 0)
3718 bed = get_elf_backend_data (abfd);
3719 if (bed->elf_backend_modify_segment_map != NULL)
3721 if (!(*bed->elf_backend_modify_segment_map) (abfd, info))
3728 /* Set up a mapping from BFD sections to program segments. */
3731 _bfd_elf_map_sections_to_segments (bfd *abfd, struct bfd_link_info *info)
3734 struct elf_segment_map *m;
3735 asection **sections = NULL;
3736 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3737 bfd_boolean no_user_phdrs;
3739 no_user_phdrs = elf_tdata (abfd)->segment_map == NULL;
3740 if (no_user_phdrs && bfd_count_sections (abfd) != 0)
3744 struct elf_segment_map *mfirst;
3745 struct elf_segment_map **pm;
3748 unsigned int phdr_index;
3749 bfd_vma maxpagesize;
3751 bfd_boolean phdr_in_segment = TRUE;
3752 bfd_boolean writable;
3754 asection *first_tls = NULL;
3755 asection *dynsec, *eh_frame_hdr;
3757 bfd_vma addr_mask, wrap_to = 0;
3759 /* Select the allocated sections, and sort them. */
3761 sections = (asection **) bfd_malloc2 (bfd_count_sections (abfd),
3762 sizeof (asection *));
3763 if (sections == NULL)
3766 /* Calculate top address, avoiding undefined behaviour of shift
3767 left operator when shift count is equal to size of type
3769 addr_mask = ((bfd_vma) 1 << (bfd_arch_bits_per_address (abfd) - 1)) - 1;
3770 addr_mask = (addr_mask << 1) + 1;
3773 for (s = abfd->sections; s != NULL; s = s->next)
3775 if ((s->flags & SEC_ALLOC) != 0)
3779 /* A wrapping section potentially clashes with header. */
3780 if (((s->lma + s->size) & addr_mask) < (s->lma & addr_mask))
3781 wrap_to = (s->lma + s->size) & addr_mask;
3784 BFD_ASSERT (i <= bfd_count_sections (abfd));
3787 qsort (sections, (size_t) count, sizeof (asection *), elf_sort_sections);
3789 /* Build the mapping. */
3794 /* If we have a .interp section, then create a PT_PHDR segment for
3795 the program headers and a PT_INTERP segment for the .interp
3797 s = bfd_get_section_by_name (abfd, ".interp");
3798 if (s != NULL && (s->flags & SEC_LOAD) != 0)
3800 amt = sizeof (struct elf_segment_map);
3801 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3805 m->p_type = PT_PHDR;
3806 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
3807 m->p_flags = PF_R | PF_X;
3808 m->p_flags_valid = 1;
3809 m->includes_phdrs = 1;
3814 amt = sizeof (struct elf_segment_map);
3815 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3819 m->p_type = PT_INTERP;
3827 /* Look through the sections. We put sections in the same program
3828 segment when the start of the second section can be placed within
3829 a few bytes of the end of the first section. */
3833 maxpagesize = bed->maxpagesize;
3835 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
3837 && (dynsec->flags & SEC_LOAD) == 0)
3840 /* Deal with -Ttext or something similar such that the first section
3841 is not adjacent to the program headers. This is an
3842 approximation, since at this point we don't know exactly how many
3843 program headers we will need. */
3846 bfd_size_type phdr_size = elf_tdata (abfd)->program_header_size;
3848 if (phdr_size == (bfd_size_type) -1)
3849 phdr_size = get_program_header_size (abfd, info);
3850 if ((abfd->flags & D_PAGED) == 0
3851 || (sections[0]->lma & addr_mask) < phdr_size
3852 || ((sections[0]->lma & addr_mask) % maxpagesize
3853 < phdr_size % maxpagesize)
3854 || (sections[0]->lma & addr_mask & -maxpagesize) < wrap_to)
3855 phdr_in_segment = FALSE;
3858 for (i = 0, hdrpp = sections; i < count; i++, hdrpp++)
3861 bfd_boolean new_segment;
3865 /* See if this section and the last one will fit in the same
3868 if (last_hdr == NULL)
3870 /* If we don't have a segment yet, then we don't need a new
3871 one (we build the last one after this loop). */
3872 new_segment = FALSE;
3874 else if (last_hdr->lma - last_hdr->vma != hdr->lma - hdr->vma)
3876 /* If this section has a different relation between the
3877 virtual address and the load address, then we need a new
3881 else if (hdr->lma < last_hdr->lma + last_size
3882 || last_hdr->lma + last_size < last_hdr->lma)
3884 /* If this section has a load address that makes it overlap
3885 the previous section, then we need a new segment. */
3888 /* In the next test we have to be careful when last_hdr->lma is close
3889 to the end of the address space. If the aligned address wraps
3890 around to the start of the address space, then there are no more
3891 pages left in memory and it is OK to assume that the current
3892 section can be included in the current segment. */
3893 else if ((BFD_ALIGN (last_hdr->lma + last_size, maxpagesize) + maxpagesize
3895 && (BFD_ALIGN (last_hdr->lma + last_size, maxpagesize) + maxpagesize
3898 /* If putting this section in this segment would force us to
3899 skip a page in the segment, then we need a new segment. */
3902 else if ((last_hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0
3903 && (hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) != 0)
3905 /* We don't want to put a loadable section after a
3906 nonloadable section in the same segment.
3907 Consider .tbss sections as loadable for this purpose. */
3910 else if ((abfd->flags & D_PAGED) == 0)
3912 /* If the file is not demand paged, which means that we
3913 don't require the sections to be correctly aligned in the
3914 file, then there is no other reason for a new segment. */
3915 new_segment = FALSE;
3918 && (hdr->flags & SEC_READONLY) == 0
3919 && (((last_hdr->lma + last_size - 1) & -maxpagesize)
3920 != (hdr->lma & -maxpagesize)))
3922 /* We don't want to put a writable section in a read only
3923 segment, unless they are on the same page in memory
3924 anyhow. We already know that the last section does not
3925 bring us past the current section on the page, so the
3926 only case in which the new section is not on the same
3927 page as the previous section is when the previous section
3928 ends precisely on a page boundary. */
3933 /* Otherwise, we can use the same segment. */
3934 new_segment = FALSE;
3937 /* Allow interested parties a chance to override our decision. */
3938 if (last_hdr != NULL
3940 && info->callbacks->override_segment_assignment != NULL)
3942 = info->callbacks->override_segment_assignment (info, abfd, hdr,
3948 if ((hdr->flags & SEC_READONLY) == 0)
3951 /* .tbss sections effectively have zero size. */
3952 if ((hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD))
3953 != SEC_THREAD_LOCAL)
3954 last_size = hdr->size;
3960 /* We need a new program segment. We must create a new program
3961 header holding all the sections from phdr_index until hdr. */
3963 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
3970 if ((hdr->flags & SEC_READONLY) == 0)
3976 /* .tbss sections effectively have zero size. */
3977 if ((hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD)) != SEC_THREAD_LOCAL)
3978 last_size = hdr->size;
3982 phdr_in_segment = FALSE;
3985 /* Create a final PT_LOAD program segment, but not if it's just
3987 if (last_hdr != NULL
3988 && (i - phdr_index != 1
3989 || ((last_hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD))
3990 != SEC_THREAD_LOCAL)))
3992 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
4000 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
4003 m = _bfd_elf_make_dynamic_segment (abfd, dynsec);
4010 /* For each batch of consecutive loadable .note sections,
4011 add a PT_NOTE segment. We don't use bfd_get_section_by_name,
4012 because if we link together nonloadable .note sections and
4013 loadable .note sections, we will generate two .note sections
4014 in the output file. FIXME: Using names for section types is
4016 for (s = abfd->sections; s != NULL; s = s->next)
4018 if ((s->flags & SEC_LOAD) != 0
4019 && CONST_STRNEQ (s->name, ".note"))
4024 amt = sizeof (struct elf_segment_map);
4025 if (s->alignment_power == 2)
4026 for (s2 = s; s2->next != NULL; s2 = s2->next)
4028 if (s2->next->alignment_power == 2
4029 && (s2->next->flags & SEC_LOAD) != 0
4030 && CONST_STRNEQ (s2->next->name, ".note")
4031 && align_power (s2->lma + s2->size, 2)
4037 amt += (count - 1) * sizeof (asection *);
4038 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
4042 m->p_type = PT_NOTE;
4046 m->sections[m->count - count--] = s;
4047 BFD_ASSERT ((s->flags & SEC_THREAD_LOCAL) == 0);
4050 m->sections[m->count - 1] = s;
4051 BFD_ASSERT ((s->flags & SEC_THREAD_LOCAL) == 0);
4055 if (s->flags & SEC_THREAD_LOCAL)
4063 /* If there are any SHF_TLS output sections, add PT_TLS segment. */
4066 amt = sizeof (struct elf_segment_map);
4067 amt += (tls_count - 1) * sizeof (asection *);
4068 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
4073 m->count = tls_count;
4074 /* Mandated PF_R. */
4076 m->p_flags_valid = 1;
4077 for (i = 0; i < (unsigned int) tls_count; ++i)
4079 BFD_ASSERT (first_tls->flags & SEC_THREAD_LOCAL);
4080 m->sections[i] = first_tls;
4081 first_tls = first_tls->next;
4088 /* If there is a .eh_frame_hdr section, throw in a PT_GNU_EH_FRAME
4090 eh_frame_hdr = elf_tdata (abfd)->eh_frame_hdr;
4091 if (eh_frame_hdr != NULL
4092 && (eh_frame_hdr->output_section->flags & SEC_LOAD) != 0)
4094 amt = sizeof (struct elf_segment_map);
4095 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
4099 m->p_type = PT_GNU_EH_FRAME;
4101 m->sections[0] = eh_frame_hdr->output_section;
4107 if (elf_tdata (abfd)->stack_flags)
4109 amt = sizeof (struct elf_segment_map);
4110 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
4114 m->p_type = PT_GNU_STACK;
4115 m->p_flags = elf_tdata (abfd)->stack_flags;
4116 m->p_flags_valid = 1;
4122 if (info != NULL && info->relro)
4124 for (m = mfirst; m != NULL; m = m->next)
4126 if (m->p_type == PT_LOAD)
4128 asection *last = m->sections[m->count - 1];
4129 bfd_vma vaddr = m->sections[0]->vma;
4130 bfd_vma filesz = last->vma - vaddr + last->size;
4132 if (vaddr < info->relro_end
4133 && vaddr >= info->relro_start
4134 && (vaddr + filesz) >= info->relro_end)
4139 /* Make a PT_GNU_RELRO segment only when it isn't empty. */
4142 amt = sizeof (struct elf_segment_map);
4143 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
4147 m->p_type = PT_GNU_RELRO;
4149 m->p_flags_valid = 1;
4157 elf_tdata (abfd)->segment_map = mfirst;
4160 if (!elf_modify_segment_map (abfd, info, no_user_phdrs))
4163 for (count = 0, m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
4165 elf_tdata (abfd)->program_header_size = count * bed->s->sizeof_phdr;
4170 if (sections != NULL)
4175 /* Sort sections by address. */
4178 elf_sort_sections (const void *arg1, const void *arg2)
4180 const asection *sec1 = *(const asection **) arg1;
4181 const asection *sec2 = *(const asection **) arg2;
4182 bfd_size_type size1, size2;
4184 /* Sort by LMA first, since this is the address used to
4185 place the section into a segment. */
4186 if (sec1->lma < sec2->lma)
4188 else if (sec1->lma > sec2->lma)
4191 /* Then sort by VMA. Normally the LMA and the VMA will be
4192 the same, and this will do nothing. */
4193 if (sec1->vma < sec2->vma)
4195 else if (sec1->vma > sec2->vma)
4198 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
4200 #define TOEND(x) (((x)->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0)
4206 /* If the indicies are the same, do not return 0
4207 here, but continue to try the next comparison. */
4208 if (sec1->target_index - sec2->target_index != 0)
4209 return sec1->target_index - sec2->target_index;
4214 else if (TOEND (sec2))
4219 /* Sort by size, to put zero sized sections
4220 before others at the same address. */
4222 size1 = (sec1->flags & SEC_LOAD) ? sec1->size : 0;
4223 size2 = (sec2->flags & SEC_LOAD) ? sec2->size : 0;
4230 return sec1->target_index - sec2->target_index;
4233 /* Ian Lance Taylor writes:
4235 We shouldn't be using % with a negative signed number. That's just
4236 not good. We have to make sure either that the number is not
4237 negative, or that the number has an unsigned type. When the types
4238 are all the same size they wind up as unsigned. When file_ptr is a
4239 larger signed type, the arithmetic winds up as signed long long,
4242 What we're trying to say here is something like ``increase OFF by
4243 the least amount that will cause it to be equal to the VMA modulo
4245 /* In other words, something like:
4247 vma_offset = m->sections[0]->vma % bed->maxpagesize;
4248 off_offset = off % bed->maxpagesize;
4249 if (vma_offset < off_offset)
4250 adjustment = vma_offset + bed->maxpagesize - off_offset;
4252 adjustment = vma_offset - off_offset;
4254 which can can be collapsed into the expression below. */
4257 vma_page_aligned_bias (bfd_vma vma, ufile_ptr off, bfd_vma maxpagesize)
4259 return ((vma - off) % maxpagesize);
4263 print_segment_map (const struct elf_segment_map *m)
4266 const char *pt = get_segment_type (m->p_type);
4271 if (m->p_type >= PT_LOPROC && m->p_type <= PT_HIPROC)
4272 sprintf (buf, "LOPROC+%7.7x",
4273 (unsigned int) (m->p_type - PT_LOPROC));
4274 else if (m->p_type >= PT_LOOS && m->p_type <= PT_HIOS)
4275 sprintf (buf, "LOOS+%7.7x",
4276 (unsigned int) (m->p_type - PT_LOOS));
4278 snprintf (buf, sizeof (buf), "%8.8x",
4279 (unsigned int) m->p_type);
4283 fprintf (stderr, "%s:", pt);
4284 for (j = 0; j < m->count; j++)
4285 fprintf (stderr, " %s", m->sections [j]->name);
4291 write_zeros (bfd *abfd, file_ptr pos, bfd_size_type len)
4296 if (bfd_seek (abfd, pos, SEEK_SET) != 0)
4298 buf = bfd_zmalloc (len);
4301 ret = bfd_bwrite (buf, len, abfd) == len;
4306 /* Assign file positions to the sections based on the mapping from
4307 sections to segments. This function also sets up some fields in
4311 assign_file_positions_for_load_sections (bfd *abfd,
4312 struct bfd_link_info *link_info)
4314 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4315 struct elf_segment_map *m;
4316 Elf_Internal_Phdr *phdrs;
4317 Elf_Internal_Phdr *p;
4319 bfd_size_type maxpagesize;
4322 bfd_vma header_pad = 0;
4324 if (link_info == NULL
4325 && !_bfd_elf_map_sections_to_segments (abfd, link_info))
4329 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
4333 header_pad = m->header_size;
4336 elf_elfheader (abfd)->e_phoff = bed->s->sizeof_ehdr;
4337 elf_elfheader (abfd)->e_phentsize = bed->s->sizeof_phdr;
4338 elf_elfheader (abfd)->e_phnum = alloc;
4340 if (elf_tdata (abfd)->program_header_size == (bfd_size_type) -1)
4341 elf_tdata (abfd)->program_header_size = alloc * bed->s->sizeof_phdr;
4343 BFD_ASSERT (elf_tdata (abfd)->program_header_size
4344 >= alloc * bed->s->sizeof_phdr);
4348 elf_tdata (abfd)->next_file_pos = bed->s->sizeof_ehdr;
4352 /* We're writing the size in elf_tdata (abfd)->program_header_size,
4353 see assign_file_positions_except_relocs, so make sure we have
4354 that amount allocated, with trailing space cleared.
4355 The variable alloc contains the computed need, while elf_tdata
4356 (abfd)->program_header_size contains the size used for the
4358 See ld/emultempl/elf-generic.em:gld${EMULATION_NAME}_map_segments
4359 where the layout is forced to according to a larger size in the
4360 last iterations for the testcase ld-elf/header. */
4361 BFD_ASSERT (elf_tdata (abfd)->program_header_size % bed->s->sizeof_phdr
4363 phdrs = (Elf_Internal_Phdr *)
4365 (elf_tdata (abfd)->program_header_size / bed->s->sizeof_phdr),
4366 sizeof (Elf_Internal_Phdr));
4367 elf_tdata (abfd)->phdr = phdrs;
4372 if ((abfd->flags & D_PAGED) != 0)
4373 maxpagesize = bed->maxpagesize;
4375 off = bed->s->sizeof_ehdr;
4376 off += alloc * bed->s->sizeof_phdr;
4377 if (header_pad < (bfd_vma) off)
4383 for (m = elf_tdata (abfd)->segment_map, p = phdrs, j = 0;
4385 m = m->next, p++, j++)
4389 bfd_boolean no_contents;
4391 /* If elf_segment_map is not from map_sections_to_segments, the
4392 sections may not be correctly ordered. NOTE: sorting should
4393 not be done to the PT_NOTE section of a corefile, which may
4394 contain several pseudo-sections artificially created by bfd.
4395 Sorting these pseudo-sections breaks things badly. */
4397 && !(elf_elfheader (abfd)->e_type == ET_CORE
4398 && m->p_type == PT_NOTE))
4399 qsort (m->sections, (size_t) m->count, sizeof (asection *),
4402 /* An ELF segment (described by Elf_Internal_Phdr) may contain a
4403 number of sections with contents contributing to both p_filesz
4404 and p_memsz, followed by a number of sections with no contents
4405 that just contribute to p_memsz. In this loop, OFF tracks next
4406 available file offset for PT_LOAD and PT_NOTE segments. */
4407 p->p_type = m->p_type;
4408 p->p_flags = m->p_flags;
4413 p->p_vaddr = m->sections[0]->vma - m->p_vaddr_offset;
4415 if (m->p_paddr_valid)
4416 p->p_paddr = m->p_paddr;
4417 else if (m->count == 0)
4420 p->p_paddr = m->sections[0]->lma - m->p_vaddr_offset;
4422 if (p->p_type == PT_LOAD
4423 && (abfd->flags & D_PAGED) != 0)
4425 /* p_align in demand paged PT_LOAD segments effectively stores
4426 the maximum page size. When copying an executable with
4427 objcopy, we set m->p_align from the input file. Use this
4428 value for maxpagesize rather than bed->maxpagesize, which
4429 may be different. Note that we use maxpagesize for PT_TLS
4430 segment alignment later in this function, so we are relying
4431 on at least one PT_LOAD segment appearing before a PT_TLS
4433 if (m->p_align_valid)
4434 maxpagesize = m->p_align;
4436 p->p_align = maxpagesize;
4438 else if (m->p_align_valid)
4439 p->p_align = m->p_align;
4440 else if (m->count == 0)
4441 p->p_align = 1 << bed->s->log_file_align;
4445 no_contents = FALSE;
4447 if (p->p_type == PT_LOAD
4450 bfd_size_type align;
4451 unsigned int align_power = 0;
4453 if (m->p_align_valid)
4457 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
4459 unsigned int secalign;
4461 secalign = bfd_get_section_alignment (abfd, *secpp);
4462 if (secalign > align_power)
4463 align_power = secalign;
4465 align = (bfd_size_type) 1 << align_power;
4466 if (align < maxpagesize)
4467 align = maxpagesize;
4470 for (i = 0; i < m->count; i++)
4471 if ((m->sections[i]->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
4472 /* If we aren't making room for this section, then
4473 it must be SHT_NOBITS regardless of what we've
4474 set via struct bfd_elf_special_section. */
4475 elf_section_type (m->sections[i]) = SHT_NOBITS;
4477 /* Find out whether this segment contains any loadable
4480 for (i = 0; i < m->count; i++)
4481 if (elf_section_type (m->sections[i]) != SHT_NOBITS)
4483 no_contents = FALSE;
4487 off_adjust = vma_page_aligned_bias (p->p_vaddr, off, align);
4491 /* We shouldn't need to align the segment on disk since
4492 the segment doesn't need file space, but the gABI
4493 arguably requires the alignment and glibc ld.so
4494 checks it. So to comply with the alignment
4495 requirement but not waste file space, we adjust
4496 p_offset for just this segment. (OFF_ADJUST is
4497 subtracted from OFF later.) This may put p_offset
4498 past the end of file, but that shouldn't matter. */
4503 /* Make sure the .dynamic section is the first section in the
4504 PT_DYNAMIC segment. */
4505 else if (p->p_type == PT_DYNAMIC
4507 && strcmp (m->sections[0]->name, ".dynamic") != 0)
4510 (_("%B: The first section in the PT_DYNAMIC segment is not the .dynamic section"),
4512 bfd_set_error (bfd_error_bad_value);
4515 /* Set the note section type to SHT_NOTE. */
4516 else if (p->p_type == PT_NOTE)
4517 for (i = 0; i < m->count; i++)
4518 elf_section_type (m->sections[i]) = SHT_NOTE;
4524 if (m->includes_filehdr)
4526 if (!m->p_flags_valid)
4528 p->p_filesz = bed->s->sizeof_ehdr;
4529 p->p_memsz = bed->s->sizeof_ehdr;
4532 BFD_ASSERT (p->p_type == PT_LOAD);
4534 if (p->p_vaddr < (bfd_vma) off)
4536 (*_bfd_error_handler)
4537 (_("%B: Not enough room for program headers, try linking with -N"),
4539 bfd_set_error (bfd_error_bad_value);
4544 if (!m->p_paddr_valid)
4549 if (m->includes_phdrs)
4551 if (!m->p_flags_valid)
4554 if (!m->includes_filehdr)
4556 p->p_offset = bed->s->sizeof_ehdr;
4560 BFD_ASSERT (p->p_type == PT_LOAD);
4561 p->p_vaddr -= off - p->p_offset;
4562 if (!m->p_paddr_valid)
4563 p->p_paddr -= off - p->p_offset;
4567 p->p_filesz += alloc * bed->s->sizeof_phdr;
4568 p->p_memsz += alloc * bed->s->sizeof_phdr;
4571 p->p_filesz += header_pad;
4572 p->p_memsz += header_pad;
4576 if (p->p_type == PT_LOAD
4577 || (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core))
4579 if (!m->includes_filehdr && !m->includes_phdrs)
4585 adjust = off - (p->p_offset + p->p_filesz);
4587 p->p_filesz += adjust;
4588 p->p_memsz += adjust;
4592 /* Set up p_filesz, p_memsz, p_align and p_flags from the section
4593 maps. Set filepos for sections in PT_LOAD segments, and in
4594 core files, for sections in PT_NOTE segments.
4595 assign_file_positions_for_non_load_sections will set filepos
4596 for other sections and update p_filesz for other segments. */
4597 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
4600 bfd_size_type align;
4601 Elf_Internal_Shdr *this_hdr;
4604 this_hdr = &elf_section_data (sec)->this_hdr;
4605 align = (bfd_size_type) 1 << bfd_get_section_alignment (abfd, sec);
4607 if ((p->p_type == PT_LOAD
4608 || p->p_type == PT_TLS)
4609 && (this_hdr->sh_type != SHT_NOBITS
4610 || ((this_hdr->sh_flags & SHF_ALLOC) != 0
4611 && ((this_hdr->sh_flags & SHF_TLS) == 0
4612 || p->p_type == PT_TLS))))
4614 bfd_vma p_start = p->p_paddr;
4615 bfd_vma p_end = p_start + p->p_memsz;
4616 bfd_vma s_start = sec->lma;
4617 bfd_vma adjust = s_start - p_end;
4621 || p_end < p_start))
4623 (*_bfd_error_handler)
4624 (_("%B: section %A lma %#lx adjusted to %#lx"), abfd, sec,
4625 (unsigned long) s_start, (unsigned long) p_end);
4629 p->p_memsz += adjust;
4631 if (this_hdr->sh_type != SHT_NOBITS)
4633 if (p->p_filesz + adjust < p->p_memsz)
4635 /* We have a PROGBITS section following NOBITS ones.
4636 Allocate file space for the NOBITS section(s) and
4638 adjust = p->p_memsz - p->p_filesz;
4639 if (!write_zeros (abfd, off, adjust))
4643 p->p_filesz += adjust;
4647 if (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core)
4649 /* The section at i == 0 is the one that actually contains
4653 this_hdr->sh_offset = sec->filepos = off;
4654 off += this_hdr->sh_size;
4655 p->p_filesz = this_hdr->sh_size;
4661 /* The rest are fake sections that shouldn't be written. */
4670 if (p->p_type == PT_LOAD)
4672 this_hdr->sh_offset = sec->filepos = off;
4673 if (this_hdr->sh_type != SHT_NOBITS)
4674 off += this_hdr->sh_size;
4676 else if (this_hdr->sh_type == SHT_NOBITS
4677 && (this_hdr->sh_flags & SHF_TLS) != 0
4678 && this_hdr->sh_offset == 0)
4680 /* This is a .tbss section that didn't get a PT_LOAD.
4681 (See _bfd_elf_map_sections_to_segments "Create a
4682 final PT_LOAD".) Set sh_offset to the value it
4683 would have if we had created a zero p_filesz and
4684 p_memsz PT_LOAD header for the section. This
4685 also makes the PT_TLS header have the same
4687 bfd_vma adjust = vma_page_aligned_bias (this_hdr->sh_addr,
4689 this_hdr->sh_offset = sec->filepos = off + adjust;
4692 if (this_hdr->sh_type != SHT_NOBITS)
4694 p->p_filesz += this_hdr->sh_size;
4695 /* A load section without SHF_ALLOC is something like
4696 a note section in a PT_NOTE segment. These take
4697 file space but are not loaded into memory. */
4698 if ((this_hdr->sh_flags & SHF_ALLOC) != 0)
4699 p->p_memsz += this_hdr->sh_size;
4701 else if ((this_hdr->sh_flags & SHF_ALLOC) != 0)
4703 if (p->p_type == PT_TLS)
4704 p->p_memsz += this_hdr->sh_size;
4706 /* .tbss is special. It doesn't contribute to p_memsz of
4708 else if ((this_hdr->sh_flags & SHF_TLS) == 0)
4709 p->p_memsz += this_hdr->sh_size;
4712 if (align > p->p_align
4713 && !m->p_align_valid
4714 && (p->p_type != PT_LOAD
4715 || (abfd->flags & D_PAGED) == 0))
4719 if (!m->p_flags_valid)
4722 if ((this_hdr->sh_flags & SHF_EXECINSTR) != 0)
4724 if ((this_hdr->sh_flags & SHF_WRITE) != 0)
4730 /* Check that all sections are in a PT_LOAD segment.
4731 Don't check funky gdb generated core files. */
4732 if (p->p_type == PT_LOAD && bfd_get_format (abfd) != bfd_core)
4734 bfd_boolean check_vma = TRUE;
4736 for (i = 1; i < m->count; i++)
4737 if (m->sections[i]->vma == m->sections[i - 1]->vma
4738 && ELF_SECTION_SIZE (&(elf_section_data (m->sections[i])
4739 ->this_hdr), p) != 0
4740 && ELF_SECTION_SIZE (&(elf_section_data (m->sections[i - 1])
4741 ->this_hdr), p) != 0)
4743 /* Looks like we have overlays packed into the segment. */
4748 for (i = 0; i < m->count; i++)
4750 Elf_Internal_Shdr *this_hdr;
4753 sec = m->sections[i];
4754 this_hdr = &(elf_section_data(sec)->this_hdr);
4755 if (!ELF_SECTION_IN_SEGMENT_1 (this_hdr, p, check_vma, 0)
4756 && !ELF_TBSS_SPECIAL (this_hdr, p))
4758 (*_bfd_error_handler)
4759 (_("%B: section `%A' can't be allocated in segment %d"),
4761 print_segment_map (m);
4767 elf_tdata (abfd)->next_file_pos = off;
4771 /* Assign file positions for the other sections. */
4774 assign_file_positions_for_non_load_sections (bfd *abfd,
4775 struct bfd_link_info *link_info)
4777 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4778 Elf_Internal_Shdr **i_shdrpp;
4779 Elf_Internal_Shdr **hdrpp;
4780 Elf_Internal_Phdr *phdrs;
4781 Elf_Internal_Phdr *p;
4782 struct elf_segment_map *m;
4783 bfd_vma filehdr_vaddr, filehdr_paddr;
4784 bfd_vma phdrs_vaddr, phdrs_paddr;
4786 unsigned int num_sec;
4790 i_shdrpp = elf_elfsections (abfd);
4791 num_sec = elf_numsections (abfd);
4792 off = elf_tdata (abfd)->next_file_pos;
4793 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
4795 struct elf_obj_tdata *tdata = elf_tdata (abfd);
4796 Elf_Internal_Shdr *hdr;
4799 if (hdr->bfd_section != NULL
4800 && (hdr->bfd_section->filepos != 0
4801 || (hdr->sh_type == SHT_NOBITS
4802 && hdr->contents == NULL)))
4803 BFD_ASSERT (hdr->sh_offset == hdr->bfd_section->filepos);
4804 else if ((hdr->sh_flags & SHF_ALLOC) != 0)
4806 (*_bfd_error_handler)
4807 (_("%B: warning: allocated section `%s' not in segment"),
4809 (hdr->bfd_section == NULL
4811 : hdr->bfd_section->name));
4812 /* We don't need to page align empty sections. */
4813 if ((abfd->flags & D_PAGED) != 0 && hdr->sh_size != 0)
4814 off += vma_page_aligned_bias (hdr->sh_addr, off,
4817 off += vma_page_aligned_bias (hdr->sh_addr, off,
4819 off = _bfd_elf_assign_file_position_for_section (hdr, off,
4822 else if (((hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
4823 && hdr->bfd_section == NULL)
4824 || hdr == i_shdrpp[tdata->symtab_section]
4825 || hdr == i_shdrpp[tdata->symtab_shndx_section]
4826 || hdr == i_shdrpp[tdata->strtab_section])
4827 hdr->sh_offset = -1;
4829 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4832 /* Now that we have set the section file positions, we can set up
4833 the file positions for the non PT_LOAD segments. */
4837 phdrs_vaddr = bed->maxpagesize + bed->s->sizeof_ehdr;
4839 phdrs = elf_tdata (abfd)->phdr;
4840 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
4845 if (p->p_type != PT_LOAD)
4848 if (m->includes_filehdr)
4850 filehdr_vaddr = p->p_vaddr;
4851 filehdr_paddr = p->p_paddr;
4853 if (m->includes_phdrs)
4855 phdrs_vaddr = p->p_vaddr;
4856 phdrs_paddr = p->p_paddr;
4857 if (m->includes_filehdr)
4859 phdrs_vaddr += bed->s->sizeof_ehdr;
4860 phdrs_paddr += bed->s->sizeof_ehdr;
4865 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
4869 if (p->p_type == PT_GNU_RELRO)
4871 const Elf_Internal_Phdr *lp;
4873 BFD_ASSERT (!m->includes_filehdr && !m->includes_phdrs);
4875 if (link_info != NULL)
4877 /* During linking the range of the RELRO segment is passed
4879 for (lp = phdrs; lp < phdrs + count; ++lp)
4881 if (lp->p_type == PT_LOAD
4882 && lp->p_vaddr >= link_info->relro_start
4883 && lp->p_vaddr < link_info->relro_end
4884 && lp->p_vaddr + lp->p_filesz >= link_info->relro_end)
4890 /* Otherwise we are copying an executable or shared
4891 library, but we need to use the same linker logic. */
4892 for (lp = phdrs; lp < phdrs + count; ++lp)
4894 if (lp->p_type == PT_LOAD
4895 && lp->p_paddr == p->p_paddr)
4900 if (lp < phdrs + count)
4902 p->p_vaddr = lp->p_vaddr;
4903 p->p_paddr = lp->p_paddr;
4904 p->p_offset = lp->p_offset;
4905 if (link_info != NULL)
4906 p->p_filesz = link_info->relro_end - lp->p_vaddr;
4907 else if (m->p_size_valid)
4908 p->p_filesz = m->p_size;
4911 p->p_memsz = p->p_filesz;
4913 p->p_flags = (lp->p_flags & ~PF_W);
4917 memset (p, 0, sizeof *p);
4918 p->p_type = PT_NULL;
4921 else if (m->count != 0)
4923 if (p->p_type != PT_LOAD
4924 && (p->p_type != PT_NOTE
4925 || bfd_get_format (abfd) != bfd_core))
4927 BFD_ASSERT (!m->includes_filehdr && !m->includes_phdrs);
4930 p->p_offset = m->sections[0]->filepos;
4931 for (i = m->count; i-- != 0;)
4933 asection *sect = m->sections[i];
4934 Elf_Internal_Shdr *hdr = &elf_section_data (sect)->this_hdr;
4935 if (hdr->sh_type != SHT_NOBITS)
4937 p->p_filesz = (sect->filepos - m->sections[0]->filepos
4944 else if (m->includes_filehdr)
4946 p->p_vaddr = filehdr_vaddr;
4947 if (! m->p_paddr_valid)
4948 p->p_paddr = filehdr_paddr;
4950 else if (m->includes_phdrs)
4952 p->p_vaddr = phdrs_vaddr;
4953 if (! m->p_paddr_valid)
4954 p->p_paddr = phdrs_paddr;
4958 elf_tdata (abfd)->next_file_pos = off;
4963 /* Work out the file positions of all the sections. This is called by
4964 _bfd_elf_compute_section_file_positions. All the section sizes and
4965 VMAs must be known before this is called.
4967 Reloc sections come in two flavours: Those processed specially as
4968 "side-channel" data attached to a section to which they apply, and
4969 those that bfd doesn't process as relocations. The latter sort are
4970 stored in a normal bfd section by bfd_section_from_shdr. We don't
4971 consider the former sort here, unless they form part of the loadable
4972 image. Reloc sections not assigned here will be handled later by
4973 assign_file_positions_for_relocs.
4975 We also don't set the positions of the .symtab and .strtab here. */
4978 assign_file_positions_except_relocs (bfd *abfd,
4979 struct bfd_link_info *link_info)
4981 struct elf_obj_tdata *tdata = elf_tdata (abfd);
4982 Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
4984 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4986 if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0
4987 && bfd_get_format (abfd) != bfd_core)
4989 Elf_Internal_Shdr ** const i_shdrpp = elf_elfsections (abfd);
4990 unsigned int num_sec = elf_numsections (abfd);
4991 Elf_Internal_Shdr **hdrpp;
4994 /* Start after the ELF header. */
4995 off = i_ehdrp->e_ehsize;
4997 /* We are not creating an executable, which means that we are
4998 not creating a program header, and that the actual order of
4999 the sections in the file is unimportant. */
5000 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
5002 Elf_Internal_Shdr *hdr;
5005 if (((hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
5006 && hdr->bfd_section == NULL)
5007 || i == tdata->symtab_section
5008 || i == tdata->symtab_shndx_section
5009 || i == tdata->strtab_section)
5011 hdr->sh_offset = -1;
5014 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
5021 /* Assign file positions for the loaded sections based on the
5022 assignment of sections to segments. */
5023 if (!assign_file_positions_for_load_sections (abfd, link_info))
5026 /* And for non-load sections. */
5027 if (!assign_file_positions_for_non_load_sections (abfd, link_info))
5030 if (bed->elf_backend_modify_program_headers != NULL)
5032 if (!(*bed->elf_backend_modify_program_headers) (abfd, link_info))
5036 /* Write out the program headers. */
5037 alloc = tdata->program_header_size / bed->s->sizeof_phdr;
5038 if (bfd_seek (abfd, (bfd_signed_vma) bed->s->sizeof_ehdr, SEEK_SET) != 0
5039 || bed->s->write_out_phdrs (abfd, tdata->phdr, alloc) != 0)
5042 off = tdata->next_file_pos;
5045 /* Place the section headers. */
5046 off = align_file_position (off, 1 << bed->s->log_file_align);
5047 i_ehdrp->e_shoff = off;
5048 off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize;
5050 tdata->next_file_pos = off;
5056 prep_headers (bfd *abfd)
5058 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form. */
5059 struct elf_strtab_hash *shstrtab;
5060 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5062 i_ehdrp = elf_elfheader (abfd);
5064 shstrtab = _bfd_elf_strtab_init ();
5065 if (shstrtab == NULL)
5068 elf_shstrtab (abfd) = shstrtab;
5070 i_ehdrp->e_ident[EI_MAG0] = ELFMAG0;
5071 i_ehdrp->e_ident[EI_MAG1] = ELFMAG1;
5072 i_ehdrp->e_ident[EI_MAG2] = ELFMAG2;
5073 i_ehdrp->e_ident[EI_MAG3] = ELFMAG3;
5075 i_ehdrp->e_ident[EI_CLASS] = bed->s->elfclass;
5076 i_ehdrp->e_ident[EI_DATA] =
5077 bfd_big_endian (abfd) ? ELFDATA2MSB : ELFDATA2LSB;
5078 i_ehdrp->e_ident[EI_VERSION] = bed->s->ev_current;
5080 if ((abfd->flags & DYNAMIC) != 0)
5081 i_ehdrp->e_type = ET_DYN;
5082 else if ((abfd->flags & EXEC_P) != 0)
5083 i_ehdrp->e_type = ET_EXEC;
5084 else if (bfd_get_format (abfd) == bfd_core)
5085 i_ehdrp->e_type = ET_CORE;
5087 i_ehdrp->e_type = ET_REL;
5089 switch (bfd_get_arch (abfd))
5091 case bfd_arch_unknown:
5092 i_ehdrp->e_machine = EM_NONE;
5095 /* There used to be a long list of cases here, each one setting
5096 e_machine to the same EM_* macro #defined as ELF_MACHINE_CODE
5097 in the corresponding bfd definition. To avoid duplication,
5098 the switch was removed. Machines that need special handling
5099 can generally do it in elf_backend_final_write_processing(),
5100 unless they need the information earlier than the final write.
5101 Such need can generally be supplied by replacing the tests for
5102 e_machine with the conditions used to determine it. */
5104 i_ehdrp->e_machine = bed->elf_machine_code;
5107 i_ehdrp->e_version = bed->s->ev_current;
5108 i_ehdrp->e_ehsize = bed->s->sizeof_ehdr;
5110 /* No program header, for now. */
5111 i_ehdrp->e_phoff = 0;
5112 i_ehdrp->e_phentsize = 0;
5113 i_ehdrp->e_phnum = 0;
5115 /* Each bfd section is section header entry. */
5116 i_ehdrp->e_entry = bfd_get_start_address (abfd);
5117 i_ehdrp->e_shentsize = bed->s->sizeof_shdr;
5119 /* If we're building an executable, we'll need a program header table. */
5120 if (abfd->flags & EXEC_P)
5121 /* It all happens later. */
5125 i_ehdrp->e_phentsize = 0;
5126 i_ehdrp->e_phoff = 0;
5129 elf_tdata (abfd)->symtab_hdr.sh_name =
5130 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".symtab", FALSE);
5131 elf_tdata (abfd)->strtab_hdr.sh_name =
5132 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".strtab", FALSE);
5133 elf_tdata (abfd)->shstrtab_hdr.sh_name =
5134 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".shstrtab", FALSE);
5135 if (elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
5136 || elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
5137 || elf_tdata (abfd)->shstrtab_hdr.sh_name == (unsigned int) -1)
5143 /* Assign file positions for all the reloc sections which are not part
5144 of the loadable file image. */
5147 _bfd_elf_assign_file_positions_for_relocs (bfd *abfd)
5150 unsigned int i, num_sec;
5151 Elf_Internal_Shdr **shdrpp;
5153 off = elf_tdata (abfd)->next_file_pos;
5155 num_sec = elf_numsections (abfd);
5156 for (i = 1, shdrpp = elf_elfsections (abfd) + 1; i < num_sec; i++, shdrpp++)
5158 Elf_Internal_Shdr *shdrp;
5161 if ((shdrp->sh_type == SHT_REL || shdrp->sh_type == SHT_RELA)
5162 && shdrp->sh_offset == -1)
5163 off = _bfd_elf_assign_file_position_for_section (shdrp, off, TRUE);
5166 elf_tdata (abfd)->next_file_pos = off;
5170 _bfd_elf_write_object_contents (bfd *abfd)
5172 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5173 Elf_Internal_Shdr **i_shdrp;
5175 unsigned int count, num_sec;
5177 if (! abfd->output_has_begun
5178 && ! _bfd_elf_compute_section_file_positions (abfd, NULL))
5181 i_shdrp = elf_elfsections (abfd);
5184 bfd_map_over_sections (abfd, bed->s->write_relocs, &failed);
5188 _bfd_elf_assign_file_positions_for_relocs (abfd);
5190 /* After writing the headers, we need to write the sections too... */
5191 num_sec = elf_numsections (abfd);
5192 for (count = 1; count < num_sec; count++)
5194 if (bed->elf_backend_section_processing)
5195 (*bed->elf_backend_section_processing) (abfd, i_shdrp[count]);
5196 if (i_shdrp[count]->contents)
5198 bfd_size_type amt = i_shdrp[count]->sh_size;
5200 if (bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET) != 0
5201 || bfd_bwrite (i_shdrp[count]->contents, amt, abfd) != amt)
5206 /* Write out the section header names. */
5207 if (elf_shstrtab (abfd) != NULL
5208 && (bfd_seek (abfd, elf_tdata (abfd)->shstrtab_hdr.sh_offset, SEEK_SET) != 0
5209 || !_bfd_elf_strtab_emit (abfd, elf_shstrtab (abfd))))
5212 if (bed->elf_backend_final_write_processing)
5213 (*bed->elf_backend_final_write_processing) (abfd,
5214 elf_tdata (abfd)->linker);
5216 if (!bed->s->write_shdrs_and_ehdr (abfd))
5219 /* This is last since write_shdrs_and_ehdr can touch i_shdrp[0]. */
5220 if (elf_tdata (abfd)->after_write_object_contents)
5221 return (*elf_tdata (abfd)->after_write_object_contents) (abfd);
5227 _bfd_elf_write_corefile_contents (bfd *abfd)
5229 /* Hopefully this can be done just like an object file. */
5230 return _bfd_elf_write_object_contents (abfd);
5233 /* Given a section, search the header to find them. */
5236 _bfd_elf_section_from_bfd_section (bfd *abfd, struct bfd_section *asect)
5238 const struct elf_backend_data *bed;
5239 unsigned int sec_index;
5241 if (elf_section_data (asect) != NULL
5242 && elf_section_data (asect)->this_idx != 0)
5243 return elf_section_data (asect)->this_idx;
5245 if (bfd_is_abs_section (asect))
5246 sec_index = SHN_ABS;
5247 else if (bfd_is_com_section (asect))
5248 sec_index = SHN_COMMON;
5249 else if (bfd_is_und_section (asect))
5250 sec_index = SHN_UNDEF;
5252 sec_index = SHN_BAD;
5254 bed = get_elf_backend_data (abfd);
5255 if (bed->elf_backend_section_from_bfd_section)
5257 int retval = sec_index;
5259 if ((*bed->elf_backend_section_from_bfd_section) (abfd, asect, &retval))
5263 if (sec_index == SHN_BAD)
5264 bfd_set_error (bfd_error_nonrepresentable_section);
5269 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
5273 _bfd_elf_symbol_from_bfd_symbol (bfd *abfd, asymbol **asym_ptr_ptr)
5275 asymbol *asym_ptr = *asym_ptr_ptr;
5277 flagword flags = asym_ptr->flags;
5279 /* When gas creates relocations against local labels, it creates its
5280 own symbol for the section, but does put the symbol into the
5281 symbol chain, so udata is 0. When the linker is generating
5282 relocatable output, this section symbol may be for one of the
5283 input sections rather than the output section. */
5284 if (asym_ptr->udata.i == 0
5285 && (flags & BSF_SECTION_SYM)
5286 && asym_ptr->section)
5291 sec = asym_ptr->section;
5292 if (sec->owner != abfd && sec->output_section != NULL)
5293 sec = sec->output_section;
5294 if (sec->owner == abfd
5295 && (indx = sec->index) < elf_num_section_syms (abfd)
5296 && elf_section_syms (abfd)[indx] != NULL)
5297 asym_ptr->udata.i = elf_section_syms (abfd)[indx]->udata.i;
5300 idx = asym_ptr->udata.i;
5304 /* This case can occur when using --strip-symbol on a symbol
5305 which is used in a relocation entry. */
5306 (*_bfd_error_handler)
5307 (_("%B: symbol `%s' required but not present"),
5308 abfd, bfd_asymbol_name (asym_ptr));
5309 bfd_set_error (bfd_error_no_symbols);
5316 "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx\n",
5317 (long) asym_ptr, asym_ptr->name, idx, (long) flags);
5325 /* Rewrite program header information. */
5328 rewrite_elf_program_header (bfd *ibfd, bfd *obfd)
5330 Elf_Internal_Ehdr *iehdr;
5331 struct elf_segment_map *map;
5332 struct elf_segment_map *map_first;
5333 struct elf_segment_map **pointer_to_map;
5334 Elf_Internal_Phdr *segment;
5337 unsigned int num_segments;
5338 bfd_boolean phdr_included = FALSE;
5339 bfd_boolean p_paddr_valid;
5340 bfd_vma maxpagesize;
5341 struct elf_segment_map *phdr_adjust_seg = NULL;
5342 unsigned int phdr_adjust_num = 0;
5343 const struct elf_backend_data *bed;
5345 bed = get_elf_backend_data (ibfd);
5346 iehdr = elf_elfheader (ibfd);
5349 pointer_to_map = &map_first;
5351 num_segments = elf_elfheader (ibfd)->e_phnum;
5352 maxpagesize = get_elf_backend_data (obfd)->maxpagesize;
5354 /* Returns the end address of the segment + 1. */
5355 #define SEGMENT_END(segment, start) \
5356 (start + (segment->p_memsz > segment->p_filesz \
5357 ? segment->p_memsz : segment->p_filesz))
5359 #define SECTION_SIZE(section, segment) \
5360 (((section->flags & (SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) \
5361 != SEC_THREAD_LOCAL || segment->p_type == PT_TLS) \
5362 ? section->size : 0)
5364 /* Returns TRUE if the given section is contained within
5365 the given segment. VMA addresses are compared. */
5366 #define IS_CONTAINED_BY_VMA(section, segment) \
5367 (section->vma >= segment->p_vaddr \
5368 && (section->vma + SECTION_SIZE (section, segment) \
5369 <= (SEGMENT_END (segment, segment->p_vaddr))))
5371 /* Returns TRUE if the given section is contained within
5372 the given segment. LMA addresses are compared. */
5373 #define IS_CONTAINED_BY_LMA(section, segment, base) \
5374 (section->lma >= base \
5375 && (section->lma + SECTION_SIZE (section, segment) \
5376 <= SEGMENT_END (segment, base)))
5378 /* Handle PT_NOTE segment. */
5379 #define IS_NOTE(p, s) \
5380 (p->p_type == PT_NOTE \
5381 && elf_section_type (s) == SHT_NOTE \
5382 && (bfd_vma) s->filepos >= p->p_offset \
5383 && ((bfd_vma) s->filepos + s->size \
5384 <= p->p_offset + p->p_filesz))
5386 /* Special case: corefile "NOTE" section containing regs, prpsinfo
5388 #define IS_COREFILE_NOTE(p, s) \
5390 && bfd_get_format (ibfd) == bfd_core \
5394 /* The complicated case when p_vaddr is 0 is to handle the Solaris
5395 linker, which generates a PT_INTERP section with p_vaddr and
5396 p_memsz set to 0. */
5397 #define IS_SOLARIS_PT_INTERP(p, s) \
5399 && p->p_paddr == 0 \
5400 && p->p_memsz == 0 \
5401 && p->p_filesz > 0 \
5402 && (s->flags & SEC_HAS_CONTENTS) != 0 \
5404 && (bfd_vma) s->filepos >= p->p_offset \
5405 && ((bfd_vma) s->filepos + s->size \
5406 <= p->p_offset + p->p_filesz))
5408 /* Decide if the given section should be included in the given segment.
5409 A section will be included if:
5410 1. It is within the address space of the segment -- we use the LMA
5411 if that is set for the segment and the VMA otherwise,
5412 2. It is an allocated section or a NOTE section in a PT_NOTE
5414 3. There is an output section associated with it,
5415 4. The section has not already been allocated to a previous segment.
5416 5. PT_GNU_STACK segments do not include any sections.
5417 6. PT_TLS segment includes only SHF_TLS sections.
5418 7. SHF_TLS sections are only in PT_TLS or PT_LOAD segments.
5419 8. PT_DYNAMIC should not contain empty sections at the beginning
5420 (with the possible exception of .dynamic). */
5421 #define IS_SECTION_IN_INPUT_SEGMENT(section, segment, bed) \
5422 ((((segment->p_paddr \
5423 ? IS_CONTAINED_BY_LMA (section, segment, segment->p_paddr) \
5424 : IS_CONTAINED_BY_VMA (section, segment)) \
5425 && (section->flags & SEC_ALLOC) != 0) \
5426 || IS_NOTE (segment, section)) \
5427 && segment->p_type != PT_GNU_STACK \
5428 && (segment->p_type != PT_TLS \
5429 || (section->flags & SEC_THREAD_LOCAL)) \
5430 && (segment->p_type == PT_LOAD \
5431 || segment->p_type == PT_TLS \
5432 || (section->flags & SEC_THREAD_LOCAL) == 0) \
5433 && (segment->p_type != PT_DYNAMIC \
5434 || SECTION_SIZE (section, segment) > 0 \
5435 || (segment->p_paddr \
5436 ? segment->p_paddr != section->lma \
5437 : segment->p_vaddr != section->vma) \
5438 || (strcmp (bfd_get_section_name (ibfd, section), ".dynamic") \
5440 && !section->segment_mark)
5442 /* If the output section of a section in the input segment is NULL,
5443 it is removed from the corresponding output segment. */
5444 #define INCLUDE_SECTION_IN_SEGMENT(section, segment, bed) \
5445 (IS_SECTION_IN_INPUT_SEGMENT (section, segment, bed) \
5446 && section->output_section != NULL)
5448 /* Returns TRUE iff seg1 starts after the end of seg2. */
5449 #define SEGMENT_AFTER_SEGMENT(seg1, seg2, field) \
5450 (seg1->field >= SEGMENT_END (seg2, seg2->field))
5452 /* Returns TRUE iff seg1 and seg2 overlap. Segments overlap iff both
5453 their VMA address ranges and their LMA address ranges overlap.
5454 It is possible to have overlapping VMA ranges without overlapping LMA
5455 ranges. RedBoot images for example can have both .data and .bss mapped
5456 to the same VMA range, but with the .data section mapped to a different
5458 #define SEGMENT_OVERLAPS(seg1, seg2) \
5459 ( !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_vaddr) \
5460 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_vaddr)) \
5461 && !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_paddr) \
5462 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_paddr)))
5464 /* Initialise the segment mark field. */
5465 for (section = ibfd->sections; section != NULL; section = section->next)
5466 section->segment_mark = FALSE;
5468 /* The Solaris linker creates program headers in which all the
5469 p_paddr fields are zero. When we try to objcopy or strip such a
5470 file, we get confused. Check for this case, and if we find it
5471 don't set the p_paddr_valid fields. */
5472 p_paddr_valid = FALSE;
5473 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5476 if (segment->p_paddr != 0)
5478 p_paddr_valid = TRUE;
5482 /* Scan through the segments specified in the program header
5483 of the input BFD. For this first scan we look for overlaps
5484 in the loadable segments. These can be created by weird
5485 parameters to objcopy. Also, fix some solaris weirdness. */
5486 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5491 Elf_Internal_Phdr *segment2;
5493 if (segment->p_type == PT_INTERP)
5494 for (section = ibfd->sections; section; section = section->next)
5495 if (IS_SOLARIS_PT_INTERP (segment, section))
5497 /* Mininal change so that the normal section to segment
5498 assignment code will work. */
5499 segment->p_vaddr = section->vma;
5503 if (segment->p_type != PT_LOAD)
5505 /* Remove PT_GNU_RELRO segment. */
5506 if (segment->p_type == PT_GNU_RELRO)
5507 segment->p_type = PT_NULL;
5511 /* Determine if this segment overlaps any previous segments. */
5512 for (j = 0, segment2 = elf_tdata (ibfd)->phdr; j < i; j++, segment2++)
5514 bfd_signed_vma extra_length;
5516 if (segment2->p_type != PT_LOAD
5517 || !SEGMENT_OVERLAPS (segment, segment2))
5520 /* Merge the two segments together. */
5521 if (segment2->p_vaddr < segment->p_vaddr)
5523 /* Extend SEGMENT2 to include SEGMENT and then delete
5525 extra_length = (SEGMENT_END (segment, segment->p_vaddr)
5526 - SEGMENT_END (segment2, segment2->p_vaddr));
5528 if (extra_length > 0)
5530 segment2->p_memsz += extra_length;
5531 segment2->p_filesz += extra_length;
5534 segment->p_type = PT_NULL;
5536 /* Since we have deleted P we must restart the outer loop. */
5538 segment = elf_tdata (ibfd)->phdr;
5543 /* Extend SEGMENT to include SEGMENT2 and then delete
5545 extra_length = (SEGMENT_END (segment2, segment2->p_vaddr)
5546 - SEGMENT_END (segment, segment->p_vaddr));
5548 if (extra_length > 0)
5550 segment->p_memsz += extra_length;
5551 segment->p_filesz += extra_length;
5554 segment2->p_type = PT_NULL;
5559 /* The second scan attempts to assign sections to segments. */
5560 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5564 unsigned int section_count;
5565 asection **sections;
5566 asection *output_section;
5568 bfd_vma matching_lma;
5569 bfd_vma suggested_lma;
5572 asection *first_section;
5573 bfd_boolean first_matching_lma;
5574 bfd_boolean first_suggested_lma;
5576 if (segment->p_type == PT_NULL)
5579 first_section = NULL;
5580 /* Compute how many sections might be placed into this segment. */
5581 for (section = ibfd->sections, section_count = 0;
5583 section = section->next)
5585 /* Find the first section in the input segment, which may be
5586 removed from the corresponding output segment. */
5587 if (IS_SECTION_IN_INPUT_SEGMENT (section, segment, bed))
5589 if (first_section == NULL)
5590 first_section = section;
5591 if (section->output_section != NULL)
5596 /* Allocate a segment map big enough to contain
5597 all of the sections we have selected. */
5598 amt = sizeof (struct elf_segment_map);
5599 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
5600 map = (struct elf_segment_map *) bfd_zalloc (obfd, amt);
5604 /* Initialise the fields of the segment map. Default to
5605 using the physical address of the segment in the input BFD. */
5607 map->p_type = segment->p_type;
5608 map->p_flags = segment->p_flags;
5609 map->p_flags_valid = 1;
5611 /* If the first section in the input segment is removed, there is
5612 no need to preserve segment physical address in the corresponding
5614 if (!first_section || first_section->output_section != NULL)
5616 map->p_paddr = segment->p_paddr;
5617 map->p_paddr_valid = p_paddr_valid;
5620 /* Determine if this segment contains the ELF file header
5621 and if it contains the program headers themselves. */
5622 map->includes_filehdr = (segment->p_offset == 0
5623 && segment->p_filesz >= iehdr->e_ehsize);
5624 map->includes_phdrs = 0;
5626 if (!phdr_included || segment->p_type != PT_LOAD)
5628 map->includes_phdrs =
5629 (segment->p_offset <= (bfd_vma) iehdr->e_phoff
5630 && (segment->p_offset + segment->p_filesz
5631 >= ((bfd_vma) iehdr->e_phoff
5632 + iehdr->e_phnum * iehdr->e_phentsize)));
5634 if (segment->p_type == PT_LOAD && map->includes_phdrs)
5635 phdr_included = TRUE;
5638 if (section_count == 0)
5640 /* Special segments, such as the PT_PHDR segment, may contain
5641 no sections, but ordinary, loadable segments should contain
5642 something. They are allowed by the ELF spec however, so only
5643 a warning is produced. */
5644 if (segment->p_type == PT_LOAD)
5645 (*_bfd_error_handler) (_("%B: warning: Empty loadable segment"
5646 " detected, is this intentional ?\n"),
5650 *pointer_to_map = map;
5651 pointer_to_map = &map->next;
5656 /* Now scan the sections in the input BFD again and attempt
5657 to add their corresponding output sections to the segment map.
5658 The problem here is how to handle an output section which has
5659 been moved (ie had its LMA changed). There are four possibilities:
5661 1. None of the sections have been moved.
5662 In this case we can continue to use the segment LMA from the
5665 2. All of the sections have been moved by the same amount.
5666 In this case we can change the segment's LMA to match the LMA
5667 of the first section.
5669 3. Some of the sections have been moved, others have not.
5670 In this case those sections which have not been moved can be
5671 placed in the current segment which will have to have its size,
5672 and possibly its LMA changed, and a new segment or segments will
5673 have to be created to contain the other sections.
5675 4. The sections have been moved, but not by the same amount.
5676 In this case we can change the segment's LMA to match the LMA
5677 of the first section and we will have to create a new segment
5678 or segments to contain the other sections.
5680 In order to save time, we allocate an array to hold the section
5681 pointers that we are interested in. As these sections get assigned
5682 to a segment, they are removed from this array. */
5684 sections = (asection **) bfd_malloc2 (section_count, sizeof (asection *));
5685 if (sections == NULL)
5688 /* Step One: Scan for segment vs section LMA conflicts.
5689 Also add the sections to the section array allocated above.
5690 Also add the sections to the current segment. In the common
5691 case, where the sections have not been moved, this means that
5692 we have completely filled the segment, and there is nothing
5697 first_matching_lma = TRUE;
5698 first_suggested_lma = TRUE;
5700 for (section = ibfd->sections;
5702 section = section->next)
5703 if (section == first_section)
5706 for (j = 0; section != NULL; section = section->next)
5708 if (INCLUDE_SECTION_IN_SEGMENT (section, segment, bed))
5710 output_section = section->output_section;
5712 sections[j++] = section;
5714 /* The Solaris native linker always sets p_paddr to 0.
5715 We try to catch that case here, and set it to the
5716 correct value. Note - some backends require that
5717 p_paddr be left as zero. */
5719 && segment->p_vaddr != 0
5720 && !bed->want_p_paddr_set_to_zero
5722 && output_section->lma != 0
5723 && output_section->vma == (segment->p_vaddr
5724 + (map->includes_filehdr
5727 + (map->includes_phdrs
5729 * iehdr->e_phentsize)
5731 map->p_paddr = segment->p_vaddr;
5733 /* Match up the physical address of the segment with the
5734 LMA address of the output section. */
5735 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
5736 || IS_COREFILE_NOTE (segment, section)
5737 || (bed->want_p_paddr_set_to_zero
5738 && IS_CONTAINED_BY_VMA (output_section, segment)))
5740 if (first_matching_lma || output_section->lma < matching_lma)
5742 matching_lma = output_section->lma;
5743 first_matching_lma = FALSE;
5746 /* We assume that if the section fits within the segment
5747 then it does not overlap any other section within that
5749 map->sections[isec++] = output_section;
5751 else if (first_suggested_lma)
5753 suggested_lma = output_section->lma;
5754 first_suggested_lma = FALSE;
5757 if (j == section_count)
5762 BFD_ASSERT (j == section_count);
5764 /* Step Two: Adjust the physical address of the current segment,
5766 if (isec == section_count)
5768 /* All of the sections fitted within the segment as currently
5769 specified. This is the default case. Add the segment to
5770 the list of built segments and carry on to process the next
5771 program header in the input BFD. */
5772 map->count = section_count;
5773 *pointer_to_map = map;
5774 pointer_to_map = &map->next;
5777 && !bed->want_p_paddr_set_to_zero
5778 && matching_lma != map->p_paddr
5779 && !map->includes_filehdr
5780 && !map->includes_phdrs)
5781 /* There is some padding before the first section in the
5782 segment. So, we must account for that in the output
5784 map->p_vaddr_offset = matching_lma - map->p_paddr;
5791 if (!first_matching_lma)
5793 /* At least one section fits inside the current segment.
5794 Keep it, but modify its physical address to match the
5795 LMA of the first section that fitted. */
5796 map->p_paddr = matching_lma;
5800 /* None of the sections fitted inside the current segment.
5801 Change the current segment's physical address to match
5802 the LMA of the first section. */
5803 map->p_paddr = suggested_lma;
5806 /* Offset the segment physical address from the lma
5807 to allow for space taken up by elf headers. */
5808 if (map->includes_filehdr)
5810 if (map->p_paddr >= iehdr->e_ehsize)
5811 map->p_paddr -= iehdr->e_ehsize;
5814 map->includes_filehdr = FALSE;
5815 map->includes_phdrs = FALSE;
5819 if (map->includes_phdrs)
5821 if (map->p_paddr >= iehdr->e_phnum * iehdr->e_phentsize)
5823 map->p_paddr -= iehdr->e_phnum * iehdr->e_phentsize;
5825 /* iehdr->e_phnum is just an estimate of the number
5826 of program headers that we will need. Make a note
5827 here of the number we used and the segment we chose
5828 to hold these headers, so that we can adjust the
5829 offset when we know the correct value. */
5830 phdr_adjust_num = iehdr->e_phnum;
5831 phdr_adjust_seg = map;
5834 map->includes_phdrs = FALSE;
5838 /* Step Three: Loop over the sections again, this time assigning
5839 those that fit to the current segment and removing them from the
5840 sections array; but making sure not to leave large gaps. Once all
5841 possible sections have been assigned to the current segment it is
5842 added to the list of built segments and if sections still remain
5843 to be assigned, a new segment is constructed before repeating
5850 first_suggested_lma = TRUE;
5852 /* Fill the current segment with sections that fit. */
5853 for (j = 0; j < section_count; j++)
5855 section = sections[j];
5857 if (section == NULL)
5860 output_section = section->output_section;
5862 BFD_ASSERT (output_section != NULL);
5864 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
5865 || IS_COREFILE_NOTE (segment, section))
5867 if (map->count == 0)
5869 /* If the first section in a segment does not start at
5870 the beginning of the segment, then something is
5872 if (output_section->lma
5874 + (map->includes_filehdr ? iehdr->e_ehsize : 0)
5875 + (map->includes_phdrs
5876 ? iehdr->e_phnum * iehdr->e_phentsize
5884 prev_sec = map->sections[map->count - 1];
5886 /* If the gap between the end of the previous section
5887 and the start of this section is more than
5888 maxpagesize then we need to start a new segment. */
5889 if ((BFD_ALIGN (prev_sec->lma + prev_sec->size,
5891 < BFD_ALIGN (output_section->lma, maxpagesize))
5892 || (prev_sec->lma + prev_sec->size
5893 > output_section->lma))
5895 if (first_suggested_lma)
5897 suggested_lma = output_section->lma;
5898 first_suggested_lma = FALSE;
5905 map->sections[map->count++] = output_section;
5908 section->segment_mark = TRUE;
5910 else if (first_suggested_lma)
5912 suggested_lma = output_section->lma;
5913 first_suggested_lma = FALSE;
5917 BFD_ASSERT (map->count > 0);
5919 /* Add the current segment to the list of built segments. */
5920 *pointer_to_map = map;
5921 pointer_to_map = &map->next;
5923 if (isec < section_count)
5925 /* We still have not allocated all of the sections to
5926 segments. Create a new segment here, initialise it
5927 and carry on looping. */
5928 amt = sizeof (struct elf_segment_map);
5929 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
5930 map = (struct elf_segment_map *) bfd_alloc (obfd, amt);
5937 /* Initialise the fields of the segment map. Set the physical
5938 physical address to the LMA of the first section that has
5939 not yet been assigned. */
5941 map->p_type = segment->p_type;
5942 map->p_flags = segment->p_flags;
5943 map->p_flags_valid = 1;
5944 map->p_paddr = suggested_lma;
5945 map->p_paddr_valid = p_paddr_valid;
5946 map->includes_filehdr = 0;
5947 map->includes_phdrs = 0;
5950 while (isec < section_count);
5955 elf_tdata (obfd)->segment_map = map_first;
5957 /* If we had to estimate the number of program headers that were
5958 going to be needed, then check our estimate now and adjust
5959 the offset if necessary. */
5960 if (phdr_adjust_seg != NULL)
5964 for (count = 0, map = map_first; map != NULL; map = map->next)
5967 if (count > phdr_adjust_num)
5968 phdr_adjust_seg->p_paddr
5969 -= (count - phdr_adjust_num) * iehdr->e_phentsize;
5974 #undef IS_CONTAINED_BY_VMA
5975 #undef IS_CONTAINED_BY_LMA
5977 #undef IS_COREFILE_NOTE
5978 #undef IS_SOLARIS_PT_INTERP
5979 #undef IS_SECTION_IN_INPUT_SEGMENT
5980 #undef INCLUDE_SECTION_IN_SEGMENT
5981 #undef SEGMENT_AFTER_SEGMENT
5982 #undef SEGMENT_OVERLAPS
5986 /* Copy ELF program header information. */
5989 copy_elf_program_header (bfd *ibfd, bfd *obfd)
5991 Elf_Internal_Ehdr *iehdr;
5992 struct elf_segment_map *map;
5993 struct elf_segment_map *map_first;
5994 struct elf_segment_map **pointer_to_map;
5995 Elf_Internal_Phdr *segment;
5997 unsigned int num_segments;
5998 bfd_boolean phdr_included = FALSE;
5999 bfd_boolean p_paddr_valid;
6001 iehdr = elf_elfheader (ibfd);
6004 pointer_to_map = &map_first;
6006 /* If all the segment p_paddr fields are zero, don't set
6007 map->p_paddr_valid. */
6008 p_paddr_valid = FALSE;
6009 num_segments = elf_elfheader (ibfd)->e_phnum;
6010 for (i = 0, segment = elf_tdata (ibfd)->phdr;
6013 if (segment->p_paddr != 0)
6015 p_paddr_valid = TRUE;
6019 for (i = 0, segment = elf_tdata (ibfd)->phdr;
6024 unsigned int section_count;
6026 Elf_Internal_Shdr *this_hdr;
6027 asection *first_section = NULL;
6028 asection *lowest_section;
6030 /* Compute how many sections are in this segment. */
6031 for (section = ibfd->sections, section_count = 0;
6033 section = section->next)
6035 this_hdr = &(elf_section_data(section)->this_hdr);
6036 if (ELF_SECTION_IN_SEGMENT (this_hdr, segment))
6038 if (first_section == NULL)
6039 first_section = section;
6044 /* Allocate a segment map big enough to contain
6045 all of the sections we have selected. */
6046 amt = sizeof (struct elf_segment_map);
6047 if (section_count != 0)
6048 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
6049 map = (struct elf_segment_map *) bfd_zalloc (obfd, amt);
6053 /* Initialize the fields of the output segment map with the
6056 map->p_type = segment->p_type;
6057 map->p_flags = segment->p_flags;
6058 map->p_flags_valid = 1;
6059 map->p_paddr = segment->p_paddr;
6060 map->p_paddr_valid = p_paddr_valid;
6061 map->p_align = segment->p_align;
6062 map->p_align_valid = 1;
6063 map->p_vaddr_offset = 0;
6065 if (map->p_type == PT_GNU_RELRO)
6067 /* The PT_GNU_RELRO segment may contain the first a few
6068 bytes in the .got.plt section even if the whole .got.plt
6069 section isn't in the PT_GNU_RELRO segment. We won't
6070 change the size of the PT_GNU_RELRO segment. */
6071 map->p_size = segment->p_memsz;
6072 map->p_size_valid = 1;
6075 /* Determine if this segment contains the ELF file header
6076 and if it contains the program headers themselves. */
6077 map->includes_filehdr = (segment->p_offset == 0
6078 && segment->p_filesz >= iehdr->e_ehsize);
6080 map->includes_phdrs = 0;
6081 if (! phdr_included || segment->p_type != PT_LOAD)
6083 map->includes_phdrs =
6084 (segment->p_offset <= (bfd_vma) iehdr->e_phoff
6085 && (segment->p_offset + segment->p_filesz
6086 >= ((bfd_vma) iehdr->e_phoff
6087 + iehdr->e_phnum * iehdr->e_phentsize)));
6089 if (segment->p_type == PT_LOAD && map->includes_phdrs)
6090 phdr_included = TRUE;
6093 lowest_section = first_section;
6094 if (section_count != 0)
6096 unsigned int isec = 0;
6098 for (section = first_section;
6100 section = section->next)
6102 this_hdr = &(elf_section_data(section)->this_hdr);
6103 if (ELF_SECTION_IN_SEGMENT (this_hdr, segment))
6105 map->sections[isec++] = section->output_section;
6106 if (section->lma < lowest_section->lma)
6107 lowest_section = section;
6108 if ((section->flags & SEC_ALLOC) != 0)
6112 /* Section lmas are set up from PT_LOAD header
6113 p_paddr in _bfd_elf_make_section_from_shdr.
6114 If this header has a p_paddr that disagrees
6115 with the section lma, flag the p_paddr as
6117 if ((section->flags & SEC_LOAD) != 0)
6118 seg_off = this_hdr->sh_offset - segment->p_offset;
6120 seg_off = this_hdr->sh_addr - segment->p_vaddr;
6121 if (section->lma - segment->p_paddr != seg_off)
6122 map->p_paddr_valid = FALSE;
6124 if (isec == section_count)
6130 if (map->includes_filehdr && lowest_section != NULL)
6131 /* We need to keep the space used by the headers fixed. */
6132 map->header_size = lowest_section->vma - segment->p_vaddr;
6134 if (!map->includes_phdrs
6135 && !map->includes_filehdr
6136 && map->p_paddr_valid)
6137 /* There is some other padding before the first section. */
6138 map->p_vaddr_offset = ((lowest_section ? lowest_section->lma : 0)
6139 - segment->p_paddr);
6141 map->count = section_count;
6142 *pointer_to_map = map;
6143 pointer_to_map = &map->next;
6146 elf_tdata (obfd)->segment_map = map_first;
6150 /* Copy private BFD data. This copies or rewrites ELF program header
6154 copy_private_bfd_data (bfd *ibfd, bfd *obfd)
6156 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
6157 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
6160 if (elf_tdata (ibfd)->phdr == NULL)
6163 if (ibfd->xvec == obfd->xvec)
6165 /* Check to see if any sections in the input BFD
6166 covered by ELF program header have changed. */
6167 Elf_Internal_Phdr *segment;
6168 asection *section, *osec;
6169 unsigned int i, num_segments;
6170 Elf_Internal_Shdr *this_hdr;
6171 const struct elf_backend_data *bed;
6173 bed = get_elf_backend_data (ibfd);
6175 /* Regenerate the segment map if p_paddr is set to 0. */
6176 if (bed->want_p_paddr_set_to_zero)
6179 /* Initialize the segment mark field. */
6180 for (section = obfd->sections; section != NULL;
6181 section = section->next)
6182 section->segment_mark = FALSE;
6184 num_segments = elf_elfheader (ibfd)->e_phnum;
6185 for (i = 0, segment = elf_tdata (ibfd)->phdr;
6189 /* PR binutils/3535. The Solaris linker always sets the p_paddr
6190 and p_memsz fields of special segments (DYNAMIC, INTERP) to 0
6191 which severly confuses things, so always regenerate the segment
6192 map in this case. */
6193 if (segment->p_paddr == 0
6194 && segment->p_memsz == 0
6195 && (segment->p_type == PT_INTERP || segment->p_type == PT_DYNAMIC))
6198 for (section = ibfd->sections;
6199 section != NULL; section = section->next)
6201 /* We mark the output section so that we know it comes
6202 from the input BFD. */
6203 osec = section->output_section;
6205 osec->segment_mark = TRUE;
6207 /* Check if this section is covered by the segment. */
6208 this_hdr = &(elf_section_data(section)->this_hdr);
6209 if (ELF_SECTION_IN_SEGMENT (this_hdr, segment))
6211 /* FIXME: Check if its output section is changed or
6212 removed. What else do we need to check? */
6214 || section->flags != osec->flags
6215 || section->lma != osec->lma
6216 || section->vma != osec->vma
6217 || section->size != osec->size
6218 || section->rawsize != osec->rawsize
6219 || section->alignment_power != osec->alignment_power)
6225 /* Check to see if any output section do not come from the
6227 for (section = obfd->sections; section != NULL;
6228 section = section->next)
6230 if (section->segment_mark == FALSE)
6233 section->segment_mark = FALSE;
6236 return copy_elf_program_header (ibfd, obfd);
6240 return rewrite_elf_program_header (ibfd, obfd);
6243 /* Initialize private output section information from input section. */
6246 _bfd_elf_init_private_section_data (bfd *ibfd,
6250 struct bfd_link_info *link_info)
6253 Elf_Internal_Shdr *ihdr, *ohdr;
6254 bfd_boolean final_link = link_info != NULL && !link_info->relocatable;
6256 if (ibfd->xvec->flavour != bfd_target_elf_flavour
6257 || obfd->xvec->flavour != bfd_target_elf_flavour)
6260 /* For objcopy and relocatable link, don't copy the output ELF
6261 section type from input if the output BFD section flags have been
6262 set to something different. For a final link allow some flags
6263 that the linker clears to differ. */
6264 if (elf_section_type (osec) == SHT_NULL
6265 && (osec->flags == isec->flags
6267 && ((osec->flags ^ isec->flags)
6268 & ~(SEC_LINK_ONCE | SEC_LINK_DUPLICATES | SEC_RELOC)) == 0)))
6269 elf_section_type (osec) = elf_section_type (isec);
6271 /* FIXME: Is this correct for all OS/PROC specific flags? */
6272 elf_section_flags (osec) |= (elf_section_flags (isec)
6273 & (SHF_MASKOS | SHF_MASKPROC));
6275 /* Set things up for objcopy and relocatable link. The output
6276 SHT_GROUP section will have its elf_next_in_group pointing back
6277 to the input group members. Ignore linker created group section.
6278 See elfNN_ia64_object_p in elfxx-ia64.c. */
6281 if (elf_sec_group (isec) == NULL
6282 || (elf_sec_group (isec)->flags & SEC_LINKER_CREATED) == 0)
6284 if (elf_section_flags (isec) & SHF_GROUP)
6285 elf_section_flags (osec) |= SHF_GROUP;
6286 elf_next_in_group (osec) = elf_next_in_group (isec);
6287 elf_section_data (osec)->group = elf_section_data (isec)->group;
6291 ihdr = &elf_section_data (isec)->this_hdr;
6293 /* We need to handle elf_linked_to_section for SHF_LINK_ORDER. We
6294 don't use the output section of the linked-to section since it
6295 may be NULL at this point. */
6296 if ((ihdr->sh_flags & SHF_LINK_ORDER) != 0)
6298 ohdr = &elf_section_data (osec)->this_hdr;
6299 ohdr->sh_flags |= SHF_LINK_ORDER;
6300 elf_linked_to_section (osec) = elf_linked_to_section (isec);
6303 osec->use_rela_p = isec->use_rela_p;
6308 /* Copy private section information. This copies over the entsize
6309 field, and sometimes the info field. */
6312 _bfd_elf_copy_private_section_data (bfd *ibfd,
6317 Elf_Internal_Shdr *ihdr, *ohdr;
6319 if (ibfd->xvec->flavour != bfd_target_elf_flavour
6320 || obfd->xvec->flavour != bfd_target_elf_flavour)
6323 ihdr = &elf_section_data (isec)->this_hdr;
6324 ohdr = &elf_section_data (osec)->this_hdr;
6326 ohdr->sh_entsize = ihdr->sh_entsize;
6328 if (ihdr->sh_type == SHT_SYMTAB
6329 || ihdr->sh_type == SHT_DYNSYM
6330 || ihdr->sh_type == SHT_GNU_verneed
6331 || ihdr->sh_type == SHT_GNU_verdef)
6332 ohdr->sh_info = ihdr->sh_info;
6334 return _bfd_elf_init_private_section_data (ibfd, isec, obfd, osec,
6338 /* Look at all the SHT_GROUP sections in IBFD, making any adjustments
6339 necessary if we are removing either the SHT_GROUP section or any of
6340 the group member sections. DISCARDED is the value that a section's
6341 output_section has if the section will be discarded, NULL when this
6342 function is called from objcopy, bfd_abs_section_ptr when called
6346 _bfd_elf_fixup_group_sections (bfd *ibfd, asection *discarded)
6350 for (isec = ibfd->sections; isec != NULL; isec = isec->next)
6351 if (elf_section_type (isec) == SHT_GROUP)
6353 asection *first = elf_next_in_group (isec);
6354 asection *s = first;
6355 bfd_size_type removed = 0;
6359 /* If this member section is being output but the
6360 SHT_GROUP section is not, then clear the group info
6361 set up by _bfd_elf_copy_private_section_data. */
6362 if (s->output_section != discarded
6363 && isec->output_section == discarded)
6365 elf_section_flags (s->output_section) &= ~SHF_GROUP;
6366 elf_group_name (s->output_section) = NULL;
6368 /* Conversely, if the member section is not being output
6369 but the SHT_GROUP section is, then adjust its size. */
6370 else if (s->output_section == discarded
6371 && isec->output_section != discarded)
6373 s = elf_next_in_group (s);
6379 if (discarded != NULL)
6381 /* If we've been called for ld -r, then we need to
6382 adjust the input section size. This function may
6383 be called multiple times, so save the original
6385 if (isec->rawsize == 0)
6386 isec->rawsize = isec->size;
6387 isec->size = isec->rawsize - removed;
6391 /* Adjust the output section size when called from
6393 isec->output_section->size -= removed;
6401 /* Copy private header information. */
6404 _bfd_elf_copy_private_header_data (bfd *ibfd, bfd *obfd)
6406 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
6407 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
6410 /* Copy over private BFD data if it has not already been copied.
6411 This must be done here, rather than in the copy_private_bfd_data
6412 entry point, because the latter is called after the section
6413 contents have been set, which means that the program headers have
6414 already been worked out. */
6415 if (elf_tdata (obfd)->segment_map == NULL && elf_tdata (ibfd)->phdr != NULL)
6417 if (! copy_private_bfd_data (ibfd, obfd))
6421 return _bfd_elf_fixup_group_sections (ibfd, NULL);
6424 /* Copy private symbol information. If this symbol is in a section
6425 which we did not map into a BFD section, try to map the section
6426 index correctly. We use special macro definitions for the mapped
6427 section indices; these definitions are interpreted by the
6428 swap_out_syms function. */
6430 #define MAP_ONESYMTAB (SHN_HIOS + 1)
6431 #define MAP_DYNSYMTAB (SHN_HIOS + 2)
6432 #define MAP_STRTAB (SHN_HIOS + 3)
6433 #define MAP_SHSTRTAB (SHN_HIOS + 4)
6434 #define MAP_SYM_SHNDX (SHN_HIOS + 5)
6437 _bfd_elf_copy_private_symbol_data (bfd *ibfd,
6442 elf_symbol_type *isym, *osym;
6444 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
6445 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
6448 isym = elf_symbol_from (ibfd, isymarg);
6449 osym = elf_symbol_from (obfd, osymarg);
6452 && isym->internal_elf_sym.st_shndx != 0
6454 && bfd_is_abs_section (isym->symbol.section))
6458 shndx = isym->internal_elf_sym.st_shndx;
6459 if (shndx == elf_onesymtab (ibfd))
6460 shndx = MAP_ONESYMTAB;
6461 else if (shndx == elf_dynsymtab (ibfd))
6462 shndx = MAP_DYNSYMTAB;
6463 else if (shndx == elf_tdata (ibfd)->strtab_section)
6465 else if (shndx == elf_tdata (ibfd)->shstrtab_section)
6466 shndx = MAP_SHSTRTAB;
6467 else if (shndx == elf_tdata (ibfd)->symtab_shndx_section)
6468 shndx = MAP_SYM_SHNDX;
6469 osym->internal_elf_sym.st_shndx = shndx;
6475 /* Swap out the symbols. */
6478 swap_out_syms (bfd *abfd,
6479 struct bfd_strtab_hash **sttp,
6482 const struct elf_backend_data *bed;
6485 struct bfd_strtab_hash *stt;
6486 Elf_Internal_Shdr *symtab_hdr;
6487 Elf_Internal_Shdr *symtab_shndx_hdr;
6488 Elf_Internal_Shdr *symstrtab_hdr;
6489 bfd_byte *outbound_syms;
6490 bfd_byte *outbound_shndx;
6493 bfd_boolean name_local_sections;
6495 if (!elf_map_symbols (abfd))
6498 /* Dump out the symtabs. */
6499 stt = _bfd_elf_stringtab_init ();
6503 bed = get_elf_backend_data (abfd);
6504 symcount = bfd_get_symcount (abfd);
6505 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
6506 symtab_hdr->sh_type = SHT_SYMTAB;
6507 symtab_hdr->sh_entsize = bed->s->sizeof_sym;
6508 symtab_hdr->sh_size = symtab_hdr->sh_entsize * (symcount + 1);
6509 symtab_hdr->sh_info = elf_num_locals (abfd) + 1;
6510 symtab_hdr->sh_addralign = (bfd_vma) 1 << bed->s->log_file_align;
6512 symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr;
6513 symstrtab_hdr->sh_type = SHT_STRTAB;
6515 outbound_syms = (bfd_byte *) bfd_alloc2 (abfd, 1 + symcount,
6516 bed->s->sizeof_sym);
6517 if (outbound_syms == NULL)
6519 _bfd_stringtab_free (stt);
6522 symtab_hdr->contents = outbound_syms;
6524 outbound_shndx = NULL;
6525 symtab_shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
6526 if (symtab_shndx_hdr->sh_name != 0)
6528 amt = (bfd_size_type) (1 + symcount) * sizeof (Elf_External_Sym_Shndx);
6529 outbound_shndx = (bfd_byte *)
6530 bfd_zalloc2 (abfd, 1 + symcount, sizeof (Elf_External_Sym_Shndx));
6531 if (outbound_shndx == NULL)
6533 _bfd_stringtab_free (stt);
6537 symtab_shndx_hdr->contents = outbound_shndx;
6538 symtab_shndx_hdr->sh_type = SHT_SYMTAB_SHNDX;
6539 symtab_shndx_hdr->sh_size = amt;
6540 symtab_shndx_hdr->sh_addralign = sizeof (Elf_External_Sym_Shndx);
6541 symtab_shndx_hdr->sh_entsize = sizeof (Elf_External_Sym_Shndx);
6544 /* Now generate the data (for "contents"). */
6546 /* Fill in zeroth symbol and swap it out. */
6547 Elf_Internal_Sym sym;
6553 sym.st_shndx = SHN_UNDEF;
6554 bed->s->swap_symbol_out (abfd, &sym, outbound_syms, outbound_shndx);
6555 outbound_syms += bed->s->sizeof_sym;
6556 if (outbound_shndx != NULL)
6557 outbound_shndx += sizeof (Elf_External_Sym_Shndx);
6561 = (bed->elf_backend_name_local_section_symbols
6562 && bed->elf_backend_name_local_section_symbols (abfd));
6564 syms = bfd_get_outsymbols (abfd);
6565 for (idx = 0; idx < symcount; idx++)
6567 Elf_Internal_Sym sym;
6568 bfd_vma value = syms[idx]->value;
6569 elf_symbol_type *type_ptr;
6570 flagword flags = syms[idx]->flags;
6573 if (!name_local_sections
6574 && (flags & (BSF_SECTION_SYM | BSF_GLOBAL)) == BSF_SECTION_SYM)
6576 /* Local section symbols have no name. */
6581 sym.st_name = (unsigned long) _bfd_stringtab_add (stt,
6584 if (sym.st_name == (unsigned long) -1)
6586 _bfd_stringtab_free (stt);
6591 type_ptr = elf_symbol_from (abfd, syms[idx]);
6593 if ((flags & BSF_SECTION_SYM) == 0
6594 && bfd_is_com_section (syms[idx]->section))
6596 /* ELF common symbols put the alignment into the `value' field,
6597 and the size into the `size' field. This is backwards from
6598 how BFD handles it, so reverse it here. */
6599 sym.st_size = value;
6600 if (type_ptr == NULL
6601 || type_ptr->internal_elf_sym.st_value == 0)
6602 sym.st_value = value >= 16 ? 16 : (1 << bfd_log2 (value));
6604 sym.st_value = type_ptr->internal_elf_sym.st_value;
6605 sym.st_shndx = _bfd_elf_section_from_bfd_section
6606 (abfd, syms[idx]->section);
6610 asection *sec = syms[idx]->section;
6613 if (sec->output_section)
6615 value += sec->output_offset;
6616 sec = sec->output_section;
6619 /* Don't add in the section vma for relocatable output. */
6620 if (! relocatable_p)
6622 sym.st_value = value;
6623 sym.st_size = type_ptr ? type_ptr->internal_elf_sym.st_size : 0;
6625 if (bfd_is_abs_section (sec)
6627 && type_ptr->internal_elf_sym.st_shndx != 0)
6629 /* This symbol is in a real ELF section which we did
6630 not create as a BFD section. Undo the mapping done
6631 by copy_private_symbol_data. */
6632 shndx = type_ptr->internal_elf_sym.st_shndx;
6636 shndx = elf_onesymtab (abfd);
6639 shndx = elf_dynsymtab (abfd);
6642 shndx = elf_tdata (abfd)->strtab_section;
6645 shndx = elf_tdata (abfd)->shstrtab_section;
6648 shndx = elf_tdata (abfd)->symtab_shndx_section;
6656 shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
6658 if (shndx == SHN_BAD)
6662 /* Writing this would be a hell of a lot easier if
6663 we had some decent documentation on bfd, and
6664 knew what to expect of the library, and what to
6665 demand of applications. For example, it
6666 appears that `objcopy' might not set the
6667 section of a symbol to be a section that is
6668 actually in the output file. */
6669 sec2 = bfd_get_section_by_name (abfd, sec->name);
6672 _bfd_error_handler (_("\
6673 Unable to find equivalent output section for symbol '%s' from section '%s'"),
6674 syms[idx]->name ? syms[idx]->name : "<Local sym>",
6676 bfd_set_error (bfd_error_invalid_operation);
6677 _bfd_stringtab_free (stt);
6681 shndx = _bfd_elf_section_from_bfd_section (abfd, sec2);
6682 BFD_ASSERT (shndx != SHN_BAD);
6686 sym.st_shndx = shndx;
6689 if ((flags & BSF_THREAD_LOCAL) != 0)
6691 else if ((flags & BSF_GNU_INDIRECT_FUNCTION) != 0)
6692 type = STT_GNU_IFUNC;
6693 else if ((flags & BSF_FUNCTION) != 0)
6695 else if ((flags & BSF_OBJECT) != 0)
6697 else if ((flags & BSF_RELC) != 0)
6699 else if ((flags & BSF_SRELC) != 0)
6704 if (syms[idx]->section->flags & SEC_THREAD_LOCAL)
6707 /* Processor-specific types. */
6708 if (type_ptr != NULL
6709 && bed->elf_backend_get_symbol_type)
6710 type = ((*bed->elf_backend_get_symbol_type)
6711 (&type_ptr->internal_elf_sym, type));
6713 if (flags & BSF_SECTION_SYM)
6715 if (flags & BSF_GLOBAL)
6716 sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION);
6718 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
6720 else if (bfd_is_com_section (syms[idx]->section))
6722 #ifdef USE_STT_COMMON
6723 if (type == STT_OBJECT)
6724 sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_COMMON);
6727 sym.st_info = ELF_ST_INFO (STB_GLOBAL, type);
6729 else if (bfd_is_und_section (syms[idx]->section))
6730 sym.st_info = ELF_ST_INFO (((flags & BSF_WEAK)
6734 else if (flags & BSF_FILE)
6735 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE);
6738 int bind = STB_LOCAL;
6740 if (flags & BSF_LOCAL)
6742 else if (flags & BSF_GNU_UNIQUE)
6743 bind = STB_GNU_UNIQUE;
6744 else if (flags & BSF_WEAK)
6746 else if (flags & BSF_GLOBAL)
6749 sym.st_info = ELF_ST_INFO (bind, type);
6752 if (type_ptr != NULL)
6753 sym.st_other = type_ptr->internal_elf_sym.st_other;
6757 bed->s->swap_symbol_out (abfd, &sym, outbound_syms, outbound_shndx);
6758 outbound_syms += bed->s->sizeof_sym;
6759 if (outbound_shndx != NULL)
6760 outbound_shndx += sizeof (Elf_External_Sym_Shndx);
6764 symstrtab_hdr->sh_size = _bfd_stringtab_size (stt);
6765 symstrtab_hdr->sh_type = SHT_STRTAB;
6767 symstrtab_hdr->sh_flags = 0;
6768 symstrtab_hdr->sh_addr = 0;
6769 symstrtab_hdr->sh_entsize = 0;
6770 symstrtab_hdr->sh_link = 0;
6771 symstrtab_hdr->sh_info = 0;
6772 symstrtab_hdr->sh_addralign = 1;
6777 /* Return the number of bytes required to hold the symtab vector.
6779 Note that we base it on the count plus 1, since we will null terminate
6780 the vector allocated based on this size. However, the ELF symbol table
6781 always has a dummy entry as symbol #0, so it ends up even. */
6784 _bfd_elf_get_symtab_upper_bound (bfd *abfd)
6788 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->symtab_hdr;
6790 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
6791 symtab_size = (symcount + 1) * (sizeof (asymbol *));
6793 symtab_size -= sizeof (asymbol *);
6799 _bfd_elf_get_dynamic_symtab_upper_bound (bfd *abfd)
6803 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->dynsymtab_hdr;
6805 if (elf_dynsymtab (abfd) == 0)
6807 bfd_set_error (bfd_error_invalid_operation);
6811 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
6812 symtab_size = (symcount + 1) * (sizeof (asymbol *));
6814 symtab_size -= sizeof (asymbol *);
6820 _bfd_elf_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED,
6823 return (asect->reloc_count + 1) * sizeof (arelent *);
6826 /* Canonicalize the relocs. */
6829 _bfd_elf_canonicalize_reloc (bfd *abfd,
6836 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6838 if (! bed->s->slurp_reloc_table (abfd, section, symbols, FALSE))
6841 tblptr = section->relocation;
6842 for (i = 0; i < section->reloc_count; i++)
6843 *relptr++ = tblptr++;
6847 return section->reloc_count;
6851 _bfd_elf_canonicalize_symtab (bfd *abfd, asymbol **allocation)
6853 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6854 long symcount = bed->s->slurp_symbol_table (abfd, allocation, FALSE);
6857 bfd_get_symcount (abfd) = symcount;
6862 _bfd_elf_canonicalize_dynamic_symtab (bfd *abfd,
6863 asymbol **allocation)
6865 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6866 long symcount = bed->s->slurp_symbol_table (abfd, allocation, TRUE);
6869 bfd_get_dynamic_symcount (abfd) = symcount;
6873 /* Return the size required for the dynamic reloc entries. Any loadable
6874 section that was actually installed in the BFD, and has type SHT_REL
6875 or SHT_RELA, and uses the dynamic symbol table, is considered to be a
6876 dynamic reloc section. */
6879 _bfd_elf_get_dynamic_reloc_upper_bound (bfd *abfd)
6884 if (elf_dynsymtab (abfd) == 0)
6886 bfd_set_error (bfd_error_invalid_operation);
6890 ret = sizeof (arelent *);
6891 for (s = abfd->sections; s != NULL; s = s->next)
6892 if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
6893 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
6894 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
6895 ret += ((s->size / elf_section_data (s)->this_hdr.sh_entsize)
6896 * sizeof (arelent *));
6901 /* Canonicalize the dynamic relocation entries. Note that we return the
6902 dynamic relocations as a single block, although they are actually
6903 associated with particular sections; the interface, which was
6904 designed for SunOS style shared libraries, expects that there is only
6905 one set of dynamic relocs. Any loadable section that was actually
6906 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses the
6907 dynamic symbol table, is considered to be a dynamic reloc section. */
6910 _bfd_elf_canonicalize_dynamic_reloc (bfd *abfd,
6914 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
6918 if (elf_dynsymtab (abfd) == 0)
6920 bfd_set_error (bfd_error_invalid_operation);
6924 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
6926 for (s = abfd->sections; s != NULL; s = s->next)
6928 if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
6929 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
6930 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
6935 if (! (*slurp_relocs) (abfd, s, syms, TRUE))
6937 count = s->size / elf_section_data (s)->this_hdr.sh_entsize;
6939 for (i = 0; i < count; i++)
6950 /* Read in the version information. */
6953 _bfd_elf_slurp_version_tables (bfd *abfd, bfd_boolean default_imported_symver)
6955 bfd_byte *contents = NULL;
6956 unsigned int freeidx = 0;
6958 if (elf_dynverref (abfd) != 0)
6960 Elf_Internal_Shdr *hdr;
6961 Elf_External_Verneed *everneed;
6962 Elf_Internal_Verneed *iverneed;
6964 bfd_byte *contents_end;
6966 hdr = &elf_tdata (abfd)->dynverref_hdr;
6968 elf_tdata (abfd)->verref = (Elf_Internal_Verneed *)
6969 bfd_zalloc2 (abfd, hdr->sh_info, sizeof (Elf_Internal_Verneed));
6970 if (elf_tdata (abfd)->verref == NULL)
6973 elf_tdata (abfd)->cverrefs = hdr->sh_info;
6975 contents = (bfd_byte *) bfd_malloc (hdr->sh_size);
6976 if (contents == NULL)
6978 error_return_verref:
6979 elf_tdata (abfd)->verref = NULL;
6980 elf_tdata (abfd)->cverrefs = 0;
6983 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
6984 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size)
6985 goto error_return_verref;
6987 if (hdr->sh_info && hdr->sh_size < sizeof (Elf_External_Verneed))
6988 goto error_return_verref;
6990 BFD_ASSERT (sizeof (Elf_External_Verneed)
6991 == sizeof (Elf_External_Vernaux));
6992 contents_end = contents + hdr->sh_size - sizeof (Elf_External_Verneed);
6993 everneed = (Elf_External_Verneed *) contents;
6994 iverneed = elf_tdata (abfd)->verref;
6995 for (i = 0; i < hdr->sh_info; i++, iverneed++)
6997 Elf_External_Vernaux *evernaux;
6998 Elf_Internal_Vernaux *ivernaux;
7001 _bfd_elf_swap_verneed_in (abfd, everneed, iverneed);
7003 iverneed->vn_bfd = abfd;
7005 iverneed->vn_filename =
7006 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
7008 if (iverneed->vn_filename == NULL)
7009 goto error_return_verref;
7011 if (iverneed->vn_cnt == 0)
7012 iverneed->vn_auxptr = NULL;
7015 iverneed->vn_auxptr = (struct elf_internal_vernaux *)
7016 bfd_alloc2 (abfd, iverneed->vn_cnt,
7017 sizeof (Elf_Internal_Vernaux));
7018 if (iverneed->vn_auxptr == NULL)
7019 goto error_return_verref;
7022 if (iverneed->vn_aux
7023 > (size_t) (contents_end - (bfd_byte *) everneed))
7024 goto error_return_verref;
7026 evernaux = ((Elf_External_Vernaux *)
7027 ((bfd_byte *) everneed + iverneed->vn_aux));
7028 ivernaux = iverneed->vn_auxptr;
7029 for (j = 0; j < iverneed->vn_cnt; j++, ivernaux++)
7031 _bfd_elf_swap_vernaux_in (abfd, evernaux, ivernaux);
7033 ivernaux->vna_nodename =
7034 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
7035 ivernaux->vna_name);
7036 if (ivernaux->vna_nodename == NULL)
7037 goto error_return_verref;
7039 if (j + 1 < iverneed->vn_cnt)
7040 ivernaux->vna_nextptr = ivernaux + 1;
7042 ivernaux->vna_nextptr = NULL;
7044 if (ivernaux->vna_next
7045 > (size_t) (contents_end - (bfd_byte *) evernaux))
7046 goto error_return_verref;
7048 evernaux = ((Elf_External_Vernaux *)
7049 ((bfd_byte *) evernaux + ivernaux->vna_next));
7051 if (ivernaux->vna_other > freeidx)
7052 freeidx = ivernaux->vna_other;
7055 if (i + 1 < hdr->sh_info)
7056 iverneed->vn_nextref = iverneed + 1;
7058 iverneed->vn_nextref = NULL;
7060 if (iverneed->vn_next
7061 > (size_t) (contents_end - (bfd_byte *) everneed))
7062 goto error_return_verref;
7064 everneed = ((Elf_External_Verneed *)
7065 ((bfd_byte *) everneed + iverneed->vn_next));
7072 if (elf_dynverdef (abfd) != 0)
7074 Elf_Internal_Shdr *hdr;
7075 Elf_External_Verdef *everdef;
7076 Elf_Internal_Verdef *iverdef;
7077 Elf_Internal_Verdef *iverdefarr;
7078 Elf_Internal_Verdef iverdefmem;
7080 unsigned int maxidx;
7081 bfd_byte *contents_end_def, *contents_end_aux;
7083 hdr = &elf_tdata (abfd)->dynverdef_hdr;
7085 contents = (bfd_byte *) bfd_malloc (hdr->sh_size);
7086 if (contents == NULL)
7088 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
7089 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size)
7092 if (hdr->sh_info && hdr->sh_size < sizeof (Elf_External_Verdef))
7095 BFD_ASSERT (sizeof (Elf_External_Verdef)
7096 >= sizeof (Elf_External_Verdaux));
7097 contents_end_def = contents + hdr->sh_size
7098 - sizeof (Elf_External_Verdef);
7099 contents_end_aux = contents + hdr->sh_size
7100 - sizeof (Elf_External_Verdaux);
7102 /* We know the number of entries in the section but not the maximum
7103 index. Therefore we have to run through all entries and find
7105 everdef = (Elf_External_Verdef *) contents;
7107 for (i = 0; i < hdr->sh_info; ++i)
7109 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
7111 if ((iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION)) > maxidx)
7112 maxidx = iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION);
7114 if (iverdefmem.vd_next
7115 > (size_t) (contents_end_def - (bfd_byte *) everdef))
7118 everdef = ((Elf_External_Verdef *)
7119 ((bfd_byte *) everdef + iverdefmem.vd_next));
7122 if (default_imported_symver)
7124 if (freeidx > maxidx)
7129 elf_tdata (abfd)->verdef = (Elf_Internal_Verdef *)
7130 bfd_zalloc2 (abfd, maxidx, sizeof (Elf_Internal_Verdef));
7131 if (elf_tdata (abfd)->verdef == NULL)
7134 elf_tdata (abfd)->cverdefs = maxidx;
7136 everdef = (Elf_External_Verdef *) contents;
7137 iverdefarr = elf_tdata (abfd)->verdef;
7138 for (i = 0; i < hdr->sh_info; i++)
7140 Elf_External_Verdaux *everdaux;
7141 Elf_Internal_Verdaux *iverdaux;
7144 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
7146 if ((iverdefmem.vd_ndx & VERSYM_VERSION) == 0)
7148 error_return_verdef:
7149 elf_tdata (abfd)->verdef = NULL;
7150 elf_tdata (abfd)->cverdefs = 0;
7154 iverdef = &iverdefarr[(iverdefmem.vd_ndx & VERSYM_VERSION) - 1];
7155 memcpy (iverdef, &iverdefmem, sizeof (Elf_Internal_Verdef));
7157 iverdef->vd_bfd = abfd;
7159 if (iverdef->vd_cnt == 0)
7160 iverdef->vd_auxptr = NULL;
7163 iverdef->vd_auxptr = (struct elf_internal_verdaux *)
7164 bfd_alloc2 (abfd, iverdef->vd_cnt,
7165 sizeof (Elf_Internal_Verdaux));
7166 if (iverdef->vd_auxptr == NULL)
7167 goto error_return_verdef;
7171 > (size_t) (contents_end_aux - (bfd_byte *) everdef))
7172 goto error_return_verdef;
7174 everdaux = ((Elf_External_Verdaux *)
7175 ((bfd_byte *) everdef + iverdef->vd_aux));
7176 iverdaux = iverdef->vd_auxptr;
7177 for (j = 0; j < iverdef->vd_cnt; j++, iverdaux++)
7179 _bfd_elf_swap_verdaux_in (abfd, everdaux, iverdaux);
7181 iverdaux->vda_nodename =
7182 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
7183 iverdaux->vda_name);
7184 if (iverdaux->vda_nodename == NULL)
7185 goto error_return_verdef;
7187 if (j + 1 < iverdef->vd_cnt)
7188 iverdaux->vda_nextptr = iverdaux + 1;
7190 iverdaux->vda_nextptr = NULL;
7192 if (iverdaux->vda_next
7193 > (size_t) (contents_end_aux - (bfd_byte *) everdaux))
7194 goto error_return_verdef;
7196 everdaux = ((Elf_External_Verdaux *)
7197 ((bfd_byte *) everdaux + iverdaux->vda_next));
7200 if (iverdef->vd_cnt)
7201 iverdef->vd_nodename = iverdef->vd_auxptr->vda_nodename;
7203 if ((size_t) (iverdef - iverdefarr) + 1 < maxidx)
7204 iverdef->vd_nextdef = iverdef + 1;
7206 iverdef->vd_nextdef = NULL;
7208 everdef = ((Elf_External_Verdef *)
7209 ((bfd_byte *) everdef + iverdef->vd_next));
7215 else if (default_imported_symver)
7222 elf_tdata (abfd)->verdef = (Elf_Internal_Verdef *)
7223 bfd_zalloc2 (abfd, freeidx, sizeof (Elf_Internal_Verdef));
7224 if (elf_tdata (abfd)->verdef == NULL)
7227 elf_tdata (abfd)->cverdefs = freeidx;
7230 /* Create a default version based on the soname. */
7231 if (default_imported_symver)
7233 Elf_Internal_Verdef *iverdef;
7234 Elf_Internal_Verdaux *iverdaux;
7236 iverdef = &elf_tdata (abfd)->verdef[freeidx - 1];;
7238 iverdef->vd_version = VER_DEF_CURRENT;
7239 iverdef->vd_flags = 0;
7240 iverdef->vd_ndx = freeidx;
7241 iverdef->vd_cnt = 1;
7243 iverdef->vd_bfd = abfd;
7245 iverdef->vd_nodename = bfd_elf_get_dt_soname (abfd);
7246 if (iverdef->vd_nodename == NULL)
7247 goto error_return_verdef;
7248 iverdef->vd_nextdef = NULL;
7249 iverdef->vd_auxptr = (struct elf_internal_verdaux *)
7250 bfd_alloc (abfd, sizeof (Elf_Internal_Verdaux));
7251 if (iverdef->vd_auxptr == NULL)
7252 goto error_return_verdef;
7254 iverdaux = iverdef->vd_auxptr;
7255 iverdaux->vda_nodename = iverdef->vd_nodename;
7256 iverdaux->vda_nextptr = NULL;
7262 if (contents != NULL)
7268 _bfd_elf_make_empty_symbol (bfd *abfd)
7270 elf_symbol_type *newsym;
7271 bfd_size_type amt = sizeof (elf_symbol_type);
7273 newsym = (elf_symbol_type *) bfd_zalloc (abfd, amt);
7278 newsym->symbol.the_bfd = abfd;
7279 return &newsym->symbol;
7284 _bfd_elf_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED,
7288 bfd_symbol_info (symbol, ret);
7291 /* Return whether a symbol name implies a local symbol. Most targets
7292 use this function for the is_local_label_name entry point, but some
7296 _bfd_elf_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED,
7299 /* Normal local symbols start with ``.L''. */
7300 if (name[0] == '.' && name[1] == 'L')
7303 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
7304 DWARF debugging symbols starting with ``..''. */
7305 if (name[0] == '.' && name[1] == '.')
7308 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
7309 emitting DWARF debugging output. I suspect this is actually a
7310 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
7311 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
7312 underscore to be emitted on some ELF targets). For ease of use,
7313 we treat such symbols as local. */
7314 if (name[0] == '_' && name[1] == '.' && name[2] == 'L' && name[3] == '_')
7321 _bfd_elf_get_lineno (bfd *abfd ATTRIBUTE_UNUSED,
7322 asymbol *symbol ATTRIBUTE_UNUSED)
7329 _bfd_elf_set_arch_mach (bfd *abfd,
7330 enum bfd_architecture arch,
7331 unsigned long machine)
7333 /* If this isn't the right architecture for this backend, and this
7334 isn't the generic backend, fail. */
7335 if (arch != get_elf_backend_data (abfd)->arch
7336 && arch != bfd_arch_unknown
7337 && get_elf_backend_data (abfd)->arch != bfd_arch_unknown)
7340 return bfd_default_set_arch_mach (abfd, arch, machine);
7343 /* Find the function to a particular section and offset,
7344 for error reporting. */
7347 elf_find_function (bfd *abfd,
7351 const char **filename_ptr,
7352 const char **functionname_ptr)
7354 const char *filename;
7355 asymbol *func, *file;
7358 /* ??? Given multiple file symbols, it is impossible to reliably
7359 choose the right file name for global symbols. File symbols are
7360 local symbols, and thus all file symbols must sort before any
7361 global symbols. The ELF spec may be interpreted to say that a
7362 file symbol must sort before other local symbols, but currently
7363 ld -r doesn't do this. So, for ld -r output, it is possible to
7364 make a better choice of file name for local symbols by ignoring
7365 file symbols appearing after a given local symbol. */
7366 enum { nothing_seen, symbol_seen, file_after_symbol_seen } state;
7367 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
7373 state = nothing_seen;
7375 for (p = symbols; *p != NULL; p++)
7380 q = (elf_symbol_type *) *p;
7382 type = ELF_ST_TYPE (q->internal_elf_sym.st_info);
7387 if (state == symbol_seen)
7388 state = file_after_symbol_seen;
7391 if (!bed->is_function_type (type))
7394 if (bfd_get_section (&q->symbol) == section
7395 && q->symbol.value >= low_func
7396 && q->symbol.value <= offset)
7398 func = (asymbol *) q;
7399 low_func = q->symbol.value;
7402 && (ELF_ST_BIND (q->internal_elf_sym.st_info) == STB_LOCAL
7403 || state != file_after_symbol_seen))
7404 filename = bfd_asymbol_name (file);
7408 if (state == nothing_seen)
7409 state = symbol_seen;
7416 *filename_ptr = filename;
7417 if (functionname_ptr)
7418 *functionname_ptr = bfd_asymbol_name (func);
7423 /* Find the nearest line to a particular section and offset,
7424 for error reporting. */
7427 _bfd_elf_find_nearest_line (bfd *abfd,
7431 const char **filename_ptr,
7432 const char **functionname_ptr,
7433 unsigned int *line_ptr)
7437 if (_bfd_dwarf1_find_nearest_line (abfd, section, symbols, offset,
7438 filename_ptr, functionname_ptr,
7441 if (!*functionname_ptr)
7442 elf_find_function (abfd, section, symbols, offset,
7443 *filename_ptr ? NULL : filename_ptr,
7449 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
7450 filename_ptr, functionname_ptr,
7452 &elf_tdata (abfd)->dwarf2_find_line_info))
7454 if (!*functionname_ptr)
7455 elf_find_function (abfd, section, symbols, offset,
7456 *filename_ptr ? NULL : filename_ptr,
7462 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
7463 &found, filename_ptr,
7464 functionname_ptr, line_ptr,
7465 &elf_tdata (abfd)->line_info))
7467 if (found && (*functionname_ptr || *line_ptr))
7470 if (symbols == NULL)
7473 if (! elf_find_function (abfd, section, symbols, offset,
7474 filename_ptr, functionname_ptr))
7481 /* Find the line for a symbol. */
7484 _bfd_elf_find_line (bfd *abfd, asymbol **symbols, asymbol *symbol,
7485 const char **filename_ptr, unsigned int *line_ptr)
7487 return _bfd_dwarf2_find_line (abfd, symbols, symbol,
7488 filename_ptr, line_ptr, 0,
7489 &elf_tdata (abfd)->dwarf2_find_line_info);
7492 /* After a call to bfd_find_nearest_line, successive calls to
7493 bfd_find_inliner_info can be used to get source information about
7494 each level of function inlining that terminated at the address
7495 passed to bfd_find_nearest_line. Currently this is only supported
7496 for DWARF2 with appropriate DWARF3 extensions. */
7499 _bfd_elf_find_inliner_info (bfd *abfd,
7500 const char **filename_ptr,
7501 const char **functionname_ptr,
7502 unsigned int *line_ptr)
7505 found = _bfd_dwarf2_find_inliner_info (abfd, filename_ptr,
7506 functionname_ptr, line_ptr,
7507 & elf_tdata (abfd)->dwarf2_find_line_info);
7512 _bfd_elf_sizeof_headers (bfd *abfd, struct bfd_link_info *info)
7514 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
7515 int ret = bed->s->sizeof_ehdr;
7517 if (!info->relocatable)
7519 bfd_size_type phdr_size = elf_tdata (abfd)->program_header_size;
7521 if (phdr_size == (bfd_size_type) -1)
7523 struct elf_segment_map *m;
7526 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
7527 phdr_size += bed->s->sizeof_phdr;
7530 phdr_size = get_program_header_size (abfd, info);
7533 elf_tdata (abfd)->program_header_size = phdr_size;
7541 _bfd_elf_set_section_contents (bfd *abfd,
7543 const void *location,
7545 bfd_size_type count)
7547 Elf_Internal_Shdr *hdr;
7550 if (! abfd->output_has_begun
7551 && ! _bfd_elf_compute_section_file_positions (abfd, NULL))
7554 hdr = &elf_section_data (section)->this_hdr;
7555 pos = hdr->sh_offset + offset;
7556 if (bfd_seek (abfd, pos, SEEK_SET) != 0
7557 || bfd_bwrite (location, count, abfd) != count)
7564 _bfd_elf_no_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
7565 arelent *cache_ptr ATTRIBUTE_UNUSED,
7566 Elf_Internal_Rela *dst ATTRIBUTE_UNUSED)
7571 /* Try to convert a non-ELF reloc into an ELF one. */
7574 _bfd_elf_validate_reloc (bfd *abfd, arelent *areloc)
7576 /* Check whether we really have an ELF howto. */
7578 if ((*areloc->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec)
7580 bfd_reloc_code_real_type code;
7581 reloc_howto_type *howto;
7583 /* Alien reloc: Try to determine its type to replace it with an
7584 equivalent ELF reloc. */
7586 if (areloc->howto->pc_relative)
7588 switch (areloc->howto->bitsize)
7591 code = BFD_RELOC_8_PCREL;
7594 code = BFD_RELOC_12_PCREL;
7597 code = BFD_RELOC_16_PCREL;
7600 code = BFD_RELOC_24_PCREL;
7603 code = BFD_RELOC_32_PCREL;
7606 code = BFD_RELOC_64_PCREL;
7612 howto = bfd_reloc_type_lookup (abfd, code);
7614 if (areloc->howto->pcrel_offset != howto->pcrel_offset)
7616 if (howto->pcrel_offset)
7617 areloc->addend += areloc->address;
7619 areloc->addend -= areloc->address; /* addend is unsigned!! */
7624 switch (areloc->howto->bitsize)
7630 code = BFD_RELOC_14;
7633 code = BFD_RELOC_16;
7636 code = BFD_RELOC_26;
7639 code = BFD_RELOC_32;
7642 code = BFD_RELOC_64;
7648 howto = bfd_reloc_type_lookup (abfd, code);
7652 areloc->howto = howto;
7660 (*_bfd_error_handler)
7661 (_("%B: unsupported relocation type %s"),
7662 abfd, areloc->howto->name);
7663 bfd_set_error (bfd_error_bad_value);
7668 _bfd_elf_close_and_cleanup (bfd *abfd)
7670 if (bfd_get_format (abfd) == bfd_object)
7672 if (elf_tdata (abfd) != NULL && elf_shstrtab (abfd) != NULL)
7673 _bfd_elf_strtab_free (elf_shstrtab (abfd));
7674 _bfd_dwarf2_cleanup_debug_info (abfd);
7677 return _bfd_generic_close_and_cleanup (abfd);
7680 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
7681 in the relocation's offset. Thus we cannot allow any sort of sanity
7682 range-checking to interfere. There is nothing else to do in processing
7685 bfd_reloc_status_type
7686 _bfd_elf_rel_vtable_reloc_fn
7687 (bfd *abfd ATTRIBUTE_UNUSED, arelent *re ATTRIBUTE_UNUSED,
7688 struct bfd_symbol *symbol ATTRIBUTE_UNUSED,
7689 void *data ATTRIBUTE_UNUSED, asection *is ATTRIBUTE_UNUSED,
7690 bfd *obfd ATTRIBUTE_UNUSED, char **errmsg ATTRIBUTE_UNUSED)
7692 return bfd_reloc_ok;
7695 /* Elf core file support. Much of this only works on native
7696 toolchains, since we rely on knowing the
7697 machine-dependent procfs structure in order to pick
7698 out details about the corefile. */
7700 #ifdef HAVE_SYS_PROCFS_H
7701 /* Needed for new procfs interface on sparc-solaris. */
7702 # define _STRUCTURED_PROC 1
7703 # include <sys/procfs.h>
7706 /* Return a PID that identifies a "thread" for threaded cores, or the
7707 PID of the main process for non-threaded cores. */
7710 elfcore_make_pid (bfd *abfd)
7714 pid = elf_tdata (abfd)->core_lwpid;
7716 pid = elf_tdata (abfd)->core_pid;
7721 /* If there isn't a section called NAME, make one, using
7722 data from SECT. Note, this function will generate a
7723 reference to NAME, so you shouldn't deallocate or
7727 elfcore_maybe_make_sect (bfd *abfd, char *name, asection *sect)
7731 if (bfd_get_section_by_name (abfd, name) != NULL)
7734 sect2 = bfd_make_section_with_flags (abfd, name, sect->flags);
7738 sect2->size = sect->size;
7739 sect2->filepos = sect->filepos;
7740 sect2->alignment_power = sect->alignment_power;
7744 /* Create a pseudosection containing SIZE bytes at FILEPOS. This
7745 actually creates up to two pseudosections:
7746 - For the single-threaded case, a section named NAME, unless
7747 such a section already exists.
7748 - For the multi-threaded case, a section named "NAME/PID", where
7749 PID is elfcore_make_pid (abfd).
7750 Both pseudosections have identical contents. */
7752 _bfd_elfcore_make_pseudosection (bfd *abfd,
7758 char *threaded_name;
7762 /* Build the section name. */
7764 sprintf (buf, "%s/%d", name, elfcore_make_pid (abfd));
7765 len = strlen (buf) + 1;
7766 threaded_name = (char *) bfd_alloc (abfd, len);
7767 if (threaded_name == NULL)
7769 memcpy (threaded_name, buf, len);
7771 sect = bfd_make_section_anyway_with_flags (abfd, threaded_name,
7776 sect->filepos = filepos;
7777 sect->alignment_power = 2;
7779 return elfcore_maybe_make_sect (abfd, name, sect);
7782 /* prstatus_t exists on:
7784 linux 2.[01] + glibc
7788 #if defined (HAVE_PRSTATUS_T)
7791 elfcore_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
7796 if (note->descsz == sizeof (prstatus_t))
7800 size = sizeof (prstat.pr_reg);
7801 offset = offsetof (prstatus_t, pr_reg);
7802 memcpy (&prstat, note->descdata, sizeof (prstat));
7804 /* Do not overwrite the core signal if it
7805 has already been set by another thread. */
7806 if (elf_tdata (abfd)->core_signal == 0)
7807 elf_tdata (abfd)->core_signal = prstat.pr_cursig;
7808 if (elf_tdata (abfd)->core_pid == 0)
7809 elf_tdata (abfd)->core_pid = prstat.pr_pid;
7811 /* pr_who exists on:
7814 pr_who doesn't exist on:
7817 #if defined (HAVE_PRSTATUS_T_PR_WHO)
7818 elf_tdata (abfd)->core_lwpid = prstat.pr_who;
7820 elf_tdata (abfd)->core_lwpid = prstat.pr_pid;
7823 #if defined (HAVE_PRSTATUS32_T)
7824 else if (note->descsz == sizeof (prstatus32_t))
7826 /* 64-bit host, 32-bit corefile */
7827 prstatus32_t prstat;
7829 size = sizeof (prstat.pr_reg);
7830 offset = offsetof (prstatus32_t, pr_reg);
7831 memcpy (&prstat, note->descdata, sizeof (prstat));
7833 /* Do not overwrite the core signal if it
7834 has already been set by another thread. */
7835 if (elf_tdata (abfd)->core_signal == 0)
7836 elf_tdata (abfd)->core_signal = prstat.pr_cursig;
7837 if (elf_tdata (abfd)->core_pid == 0)
7838 elf_tdata (abfd)->core_pid = prstat.pr_pid;
7840 /* pr_who exists on:
7843 pr_who doesn't exist on:
7846 #if defined (HAVE_PRSTATUS32_T_PR_WHO)
7847 elf_tdata (abfd)->core_lwpid = prstat.pr_who;
7849 elf_tdata (abfd)->core_lwpid = prstat.pr_pid;
7852 #endif /* HAVE_PRSTATUS32_T */
7855 /* Fail - we don't know how to handle any other
7856 note size (ie. data object type). */
7860 /* Make a ".reg/999" section and a ".reg" section. */
7861 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
7862 size, note->descpos + offset);
7864 #endif /* defined (HAVE_PRSTATUS_T) */
7866 /* Create a pseudosection containing the exact contents of NOTE. */
7868 elfcore_make_note_pseudosection (bfd *abfd,
7870 Elf_Internal_Note *note)
7872 return _bfd_elfcore_make_pseudosection (abfd, name,
7873 note->descsz, note->descpos);
7876 /* There isn't a consistent prfpregset_t across platforms,
7877 but it doesn't matter, because we don't have to pick this
7878 data structure apart. */
7881 elfcore_grok_prfpreg (bfd *abfd, Elf_Internal_Note *note)
7883 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
7886 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
7887 type of NT_PRXFPREG. Just include the whole note's contents
7891 elfcore_grok_prxfpreg (bfd *abfd, Elf_Internal_Note *note)
7893 return elfcore_make_note_pseudosection (abfd, ".reg-xfp", note);
7896 /* Linux dumps the Intel XSAVE extended state in a note named "LINUX"
7897 with a note type of NT_X86_XSTATE. Just include the whole note's
7898 contents literally. */
7901 elfcore_grok_xstatereg (bfd *abfd, Elf_Internal_Note *note)
7903 return elfcore_make_note_pseudosection (abfd, ".reg-xstate", note);
7907 elfcore_grok_ppc_vmx (bfd *abfd, Elf_Internal_Note *note)
7909 return elfcore_make_note_pseudosection (abfd, ".reg-ppc-vmx", note);
7913 elfcore_grok_ppc_vsx (bfd *abfd, Elf_Internal_Note *note)
7915 return elfcore_make_note_pseudosection (abfd, ".reg-ppc-vsx", note);
7919 elfcore_grok_s390_high_gprs (bfd *abfd, Elf_Internal_Note *note)
7921 return elfcore_make_note_pseudosection (abfd, ".reg-s390-high-gprs", note);
7925 elfcore_grok_s390_timer (bfd *abfd, Elf_Internal_Note *note)
7927 return elfcore_make_note_pseudosection (abfd, ".reg-s390-timer", note);
7931 elfcore_grok_s390_todcmp (bfd *abfd, Elf_Internal_Note *note)
7933 return elfcore_make_note_pseudosection (abfd, ".reg-s390-todcmp", note);
7937 elfcore_grok_s390_todpreg (bfd *abfd, Elf_Internal_Note *note)
7939 return elfcore_make_note_pseudosection (abfd, ".reg-s390-todpreg", note);
7943 elfcore_grok_s390_ctrs (bfd *abfd, Elf_Internal_Note *note)
7945 return elfcore_make_note_pseudosection (abfd, ".reg-s390-ctrs", note);
7949 elfcore_grok_s390_prefix (bfd *abfd, Elf_Internal_Note *note)
7951 return elfcore_make_note_pseudosection (abfd, ".reg-s390-prefix", note);
7954 #if defined (HAVE_PRPSINFO_T)
7955 typedef prpsinfo_t elfcore_psinfo_t;
7956 #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
7957 typedef prpsinfo32_t elfcore_psinfo32_t;
7961 #if defined (HAVE_PSINFO_T)
7962 typedef psinfo_t elfcore_psinfo_t;
7963 #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
7964 typedef psinfo32_t elfcore_psinfo32_t;
7968 /* return a malloc'ed copy of a string at START which is at
7969 most MAX bytes long, possibly without a terminating '\0'.
7970 the copy will always have a terminating '\0'. */
7973 _bfd_elfcore_strndup (bfd *abfd, char *start, size_t max)
7976 char *end = (char *) memchr (start, '\0', max);
7984 dups = (char *) bfd_alloc (abfd, len + 1);
7988 memcpy (dups, start, len);
7994 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7996 elfcore_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
7998 if (note->descsz == sizeof (elfcore_psinfo_t))
8000 elfcore_psinfo_t psinfo;
8002 memcpy (&psinfo, note->descdata, sizeof (psinfo));
8004 #if defined (HAVE_PSINFO_T_PR_PID) || defined (HAVE_PRPSINFO_T_PR_PID)
8005 elf_tdata (abfd)->core_pid = psinfo.pr_pid;
8007 elf_tdata (abfd)->core_program
8008 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
8009 sizeof (psinfo.pr_fname));
8011 elf_tdata (abfd)->core_command
8012 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
8013 sizeof (psinfo.pr_psargs));
8015 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
8016 else if (note->descsz == sizeof (elfcore_psinfo32_t))
8018 /* 64-bit host, 32-bit corefile */
8019 elfcore_psinfo32_t psinfo;
8021 memcpy (&psinfo, note->descdata, sizeof (psinfo));
8023 #if defined (HAVE_PSINFO32_T_PR_PID) || defined (HAVE_PRPSINFO32_T_PR_PID)
8024 elf_tdata (abfd)->core_pid = psinfo.pr_pid;
8026 elf_tdata (abfd)->core_program
8027 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
8028 sizeof (psinfo.pr_fname));
8030 elf_tdata (abfd)->core_command
8031 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
8032 sizeof (psinfo.pr_psargs));
8038 /* Fail - we don't know how to handle any other
8039 note size (ie. data object type). */
8043 /* Note that for some reason, a spurious space is tacked
8044 onto the end of the args in some (at least one anyway)
8045 implementations, so strip it off if it exists. */
8048 char *command = elf_tdata (abfd)->core_command;
8049 int n = strlen (command);
8051 if (0 < n && command[n - 1] == ' ')
8052 command[n - 1] = '\0';
8057 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
8059 #if defined (HAVE_PSTATUS_T)
8061 elfcore_grok_pstatus (bfd *abfd, Elf_Internal_Note *note)
8063 if (note->descsz == sizeof (pstatus_t)
8064 #if defined (HAVE_PXSTATUS_T)
8065 || note->descsz == sizeof (pxstatus_t)
8071 memcpy (&pstat, note->descdata, sizeof (pstat));
8073 elf_tdata (abfd)->core_pid = pstat.pr_pid;
8075 #if defined (HAVE_PSTATUS32_T)
8076 else if (note->descsz == sizeof (pstatus32_t))
8078 /* 64-bit host, 32-bit corefile */
8081 memcpy (&pstat, note->descdata, sizeof (pstat));
8083 elf_tdata (abfd)->core_pid = pstat.pr_pid;
8086 /* Could grab some more details from the "representative"
8087 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
8088 NT_LWPSTATUS note, presumably. */
8092 #endif /* defined (HAVE_PSTATUS_T) */
8094 #if defined (HAVE_LWPSTATUS_T)
8096 elfcore_grok_lwpstatus (bfd *abfd, Elf_Internal_Note *note)
8098 lwpstatus_t lwpstat;
8104 if (note->descsz != sizeof (lwpstat)
8105 #if defined (HAVE_LWPXSTATUS_T)
8106 && note->descsz != sizeof (lwpxstatus_t)
8111 memcpy (&lwpstat, note->descdata, sizeof (lwpstat));
8113 elf_tdata (abfd)->core_lwpid = lwpstat.pr_lwpid;
8114 /* Do not overwrite the core signal if it has already been set by
8116 if (elf_tdata (abfd)->core_signal == 0)
8117 elf_tdata (abfd)->core_signal = lwpstat.pr_cursig;
8119 /* Make a ".reg/999" section. */
8121 sprintf (buf, ".reg/%d", elfcore_make_pid (abfd));
8122 len = strlen (buf) + 1;
8123 name = bfd_alloc (abfd, len);
8126 memcpy (name, buf, len);
8128 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
8132 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
8133 sect->size = sizeof (lwpstat.pr_context.uc_mcontext.gregs);
8134 sect->filepos = note->descpos
8135 + offsetof (lwpstatus_t, pr_context.uc_mcontext.gregs);
8138 #if defined (HAVE_LWPSTATUS_T_PR_REG)
8139 sect->size = sizeof (lwpstat.pr_reg);
8140 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_reg);
8143 sect->alignment_power = 2;
8145 if (!elfcore_maybe_make_sect (abfd, ".reg", sect))
8148 /* Make a ".reg2/999" section */
8150 sprintf (buf, ".reg2/%d", elfcore_make_pid (abfd));
8151 len = strlen (buf) + 1;
8152 name = bfd_alloc (abfd, len);
8155 memcpy (name, buf, len);
8157 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
8161 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
8162 sect->size = sizeof (lwpstat.pr_context.uc_mcontext.fpregs);
8163 sect->filepos = note->descpos
8164 + offsetof (lwpstatus_t, pr_context.uc_mcontext.fpregs);
8167 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
8168 sect->size = sizeof (lwpstat.pr_fpreg);
8169 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_fpreg);
8172 sect->alignment_power = 2;
8174 return elfcore_maybe_make_sect (abfd, ".reg2", sect);
8176 #endif /* defined (HAVE_LWPSTATUS_T) */
8179 elfcore_grok_win32pstatus (bfd *abfd, Elf_Internal_Note *note)
8186 int is_active_thread;
8189 if (note->descsz < 728)
8192 if (! CONST_STRNEQ (note->namedata, "win32"))
8195 type = bfd_get_32 (abfd, note->descdata);
8199 case 1 /* NOTE_INFO_PROCESS */:
8200 /* FIXME: need to add ->core_command. */
8201 /* process_info.pid */
8202 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 8);
8203 /* process_info.signal */
8204 elf_tdata (abfd)->core_signal = bfd_get_32 (abfd, note->descdata + 12);
8207 case 2 /* NOTE_INFO_THREAD */:
8208 /* Make a ".reg/999" section. */
8209 /* thread_info.tid */
8210 sprintf (buf, ".reg/%ld", (long) bfd_get_32 (abfd, note->descdata + 8));
8212 len = strlen (buf) + 1;
8213 name = (char *) bfd_alloc (abfd, len);
8217 memcpy (name, buf, len);
8219 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
8223 /* sizeof (thread_info.thread_context) */
8225 /* offsetof (thread_info.thread_context) */
8226 sect->filepos = note->descpos + 12;
8227 sect->alignment_power = 2;
8229 /* thread_info.is_active_thread */
8230 is_active_thread = bfd_get_32 (abfd, note->descdata + 8);
8232 if (is_active_thread)
8233 if (! elfcore_maybe_make_sect (abfd, ".reg", sect))
8237 case 3 /* NOTE_INFO_MODULE */:
8238 /* Make a ".module/xxxxxxxx" section. */
8239 /* module_info.base_address */
8240 base_addr = bfd_get_32 (abfd, note->descdata + 4);
8241 sprintf (buf, ".module/%08lx", (unsigned long) base_addr);
8243 len = strlen (buf) + 1;
8244 name = (char *) bfd_alloc (abfd, len);
8248 memcpy (name, buf, len);
8250 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
8255 sect->size = note->descsz;
8256 sect->filepos = note->descpos;
8257 sect->alignment_power = 2;
8268 elfcore_grok_note (bfd *abfd, Elf_Internal_Note *note)
8270 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8278 if (bed->elf_backend_grok_prstatus)
8279 if ((*bed->elf_backend_grok_prstatus) (abfd, note))
8281 #if defined (HAVE_PRSTATUS_T)
8282 return elfcore_grok_prstatus (abfd, note);
8287 #if defined (HAVE_PSTATUS_T)
8289 return elfcore_grok_pstatus (abfd, note);
8292 #if defined (HAVE_LWPSTATUS_T)
8294 return elfcore_grok_lwpstatus (abfd, note);
8297 case NT_FPREGSET: /* FIXME: rename to NT_PRFPREG */
8298 return elfcore_grok_prfpreg (abfd, note);
8300 case NT_WIN32PSTATUS:
8301 return elfcore_grok_win32pstatus (abfd, note);
8303 case NT_PRXFPREG: /* Linux SSE extension */
8304 if (note->namesz == 6
8305 && strcmp (note->namedata, "LINUX") == 0)
8306 return elfcore_grok_prxfpreg (abfd, note);
8310 case NT_X86_XSTATE: /* Linux XSAVE extension */
8311 if (note->namesz == 6
8312 && strcmp (note->namedata, "LINUX") == 0)
8313 return elfcore_grok_xstatereg (abfd, note);
8318 if (note->namesz == 6
8319 && strcmp (note->namedata, "LINUX") == 0)
8320 return elfcore_grok_ppc_vmx (abfd, note);
8325 if (note->namesz == 6
8326 && strcmp (note->namedata, "LINUX") == 0)
8327 return elfcore_grok_ppc_vsx (abfd, note);
8331 case NT_S390_HIGH_GPRS:
8332 if (note->namesz == 6
8333 && strcmp (note->namedata, "LINUX") == 0)
8334 return elfcore_grok_s390_high_gprs (abfd, note);
8339 if (note->namesz == 6
8340 && strcmp (note->namedata, "LINUX") == 0)
8341 return elfcore_grok_s390_timer (abfd, note);
8345 case NT_S390_TODCMP:
8346 if (note->namesz == 6
8347 && strcmp (note->namedata, "LINUX") == 0)
8348 return elfcore_grok_s390_todcmp (abfd, note);
8352 case NT_S390_TODPREG:
8353 if (note->namesz == 6
8354 && strcmp (note->namedata, "LINUX") == 0)
8355 return elfcore_grok_s390_todpreg (abfd, note);
8360 if (note->namesz == 6
8361 && strcmp (note->namedata, "LINUX") == 0)
8362 return elfcore_grok_s390_ctrs (abfd, note);
8366 case NT_S390_PREFIX:
8367 if (note->namesz == 6
8368 && strcmp (note->namedata, "LINUX") == 0)
8369 return elfcore_grok_s390_prefix (abfd, note);
8375 if (bed->elf_backend_grok_psinfo)
8376 if ((*bed->elf_backend_grok_psinfo) (abfd, note))
8378 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
8379 return elfcore_grok_psinfo (abfd, note);
8386 asection *sect = bfd_make_section_anyway_with_flags (abfd, ".auxv",
8391 sect->size = note->descsz;
8392 sect->filepos = note->descpos;
8393 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32;
8401 elfobj_grok_gnu_build_id (bfd *abfd, Elf_Internal_Note *note)
8403 elf_tdata (abfd)->build_id_size = note->descsz;
8404 elf_tdata (abfd)->build_id = (bfd_byte *) bfd_alloc (abfd, note->descsz);
8405 if (elf_tdata (abfd)->build_id == NULL)
8408 memcpy (elf_tdata (abfd)->build_id, note->descdata, note->descsz);
8414 elfobj_grok_gnu_note (bfd *abfd, Elf_Internal_Note *note)
8421 case NT_GNU_BUILD_ID:
8422 return elfobj_grok_gnu_build_id (abfd, note);
8427 elfcore_netbsd_get_lwpid (Elf_Internal_Note *note, int *lwpidp)
8431 cp = strchr (note->namedata, '@');
8434 *lwpidp = atoi(cp + 1);
8441 elfcore_grok_netbsd_procinfo (bfd *abfd, Elf_Internal_Note *note)
8443 /* Signal number at offset 0x08. */
8444 elf_tdata (abfd)->core_signal
8445 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x08);
8447 /* Process ID at offset 0x50. */
8448 elf_tdata (abfd)->core_pid
8449 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x50);
8451 /* Command name at 0x7c (max 32 bytes, including nul). */
8452 elf_tdata (abfd)->core_command
8453 = _bfd_elfcore_strndup (abfd, note->descdata + 0x7c, 31);
8455 return elfcore_make_note_pseudosection (abfd, ".note.netbsdcore.procinfo",
8460 elfcore_grok_netbsd_note (bfd *abfd, Elf_Internal_Note *note)
8464 if (elfcore_netbsd_get_lwpid (note, &lwp))
8465 elf_tdata (abfd)->core_lwpid = lwp;
8467 if (note->type == NT_NETBSDCORE_PROCINFO)
8469 /* NetBSD-specific core "procinfo". Note that we expect to
8470 find this note before any of the others, which is fine,
8471 since the kernel writes this note out first when it
8472 creates a core file. */
8474 return elfcore_grok_netbsd_procinfo (abfd, note);
8477 /* As of Jan 2002 there are no other machine-independent notes
8478 defined for NetBSD core files. If the note type is less
8479 than the start of the machine-dependent note types, we don't
8482 if (note->type < NT_NETBSDCORE_FIRSTMACH)
8486 switch (bfd_get_arch (abfd))
8488 /* On the Alpha, SPARC (32-bit and 64-bit), PT_GETREGS == mach+0 and
8489 PT_GETFPREGS == mach+2. */
8491 case bfd_arch_alpha:
8492 case bfd_arch_sparc:
8495 case NT_NETBSDCORE_FIRSTMACH+0:
8496 return elfcore_make_note_pseudosection (abfd, ".reg", note);
8498 case NT_NETBSDCORE_FIRSTMACH+2:
8499 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
8505 /* On all other arch's, PT_GETREGS == mach+1 and
8506 PT_GETFPREGS == mach+3. */
8511 case NT_NETBSDCORE_FIRSTMACH+1:
8512 return elfcore_make_note_pseudosection (abfd, ".reg", note);
8514 case NT_NETBSDCORE_FIRSTMACH+3:
8515 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
8525 elfcore_grok_openbsd_procinfo (bfd *abfd, Elf_Internal_Note *note)
8527 /* Signal number at offset 0x08. */
8528 elf_tdata (abfd)->core_signal
8529 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x08);
8531 /* Process ID at offset 0x20. */
8532 elf_tdata (abfd)->core_pid
8533 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x20);
8535 /* Command name at 0x48 (max 32 bytes, including nul). */
8536 elf_tdata (abfd)->core_command
8537 = _bfd_elfcore_strndup (abfd, note->descdata + 0x48, 31);
8543 elfcore_grok_openbsd_note (bfd *abfd, Elf_Internal_Note *note)
8545 if (note->type == NT_OPENBSD_PROCINFO)
8546 return elfcore_grok_openbsd_procinfo (abfd, note);
8548 if (note->type == NT_OPENBSD_REGS)
8549 return elfcore_make_note_pseudosection (abfd, ".reg", note);
8551 if (note->type == NT_OPENBSD_FPREGS)
8552 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
8554 if (note->type == NT_OPENBSD_XFPREGS)
8555 return elfcore_make_note_pseudosection (abfd, ".reg-xfp", note);
8557 if (note->type == NT_OPENBSD_AUXV)
8559 asection *sect = bfd_make_section_anyway_with_flags (abfd, ".auxv",
8564 sect->size = note->descsz;
8565 sect->filepos = note->descpos;
8566 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32;
8571 if (note->type == NT_OPENBSD_WCOOKIE)
8573 asection *sect = bfd_make_section_anyway_with_flags (abfd, ".wcookie",
8578 sect->size = note->descsz;
8579 sect->filepos = note->descpos;
8580 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32;
8589 elfcore_grok_nto_status (bfd *abfd, Elf_Internal_Note *note, long *tid)
8591 void *ddata = note->descdata;
8598 /* nto_procfs_status 'pid' field is at offset 0. */
8599 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, (bfd_byte *) ddata);
8601 /* nto_procfs_status 'tid' field is at offset 4. Pass it back. */
8602 *tid = bfd_get_32 (abfd, (bfd_byte *) ddata + 4);
8604 /* nto_procfs_status 'flags' field is at offset 8. */
8605 flags = bfd_get_32 (abfd, (bfd_byte *) ddata + 8);
8607 /* nto_procfs_status 'what' field is at offset 14. */
8608 if ((sig = bfd_get_16 (abfd, (bfd_byte *) ddata + 14)) > 0)
8610 elf_tdata (abfd)->core_signal = sig;
8611 elf_tdata (abfd)->core_lwpid = *tid;
8614 /* _DEBUG_FLAG_CURTID (current thread) is 0x80. Some cores
8615 do not come from signals so we make sure we set the current
8616 thread just in case. */
8617 if (flags & 0x00000080)
8618 elf_tdata (abfd)->core_lwpid = *tid;
8620 /* Make a ".qnx_core_status/%d" section. */
8621 sprintf (buf, ".qnx_core_status/%ld", *tid);
8623 name = (char *) bfd_alloc (abfd, strlen (buf) + 1);
8628 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
8632 sect->size = note->descsz;
8633 sect->filepos = note->descpos;
8634 sect->alignment_power = 2;
8636 return (elfcore_maybe_make_sect (abfd, ".qnx_core_status", sect));
8640 elfcore_grok_nto_regs (bfd *abfd,
8641 Elf_Internal_Note *note,
8649 /* Make a "(base)/%d" section. */
8650 sprintf (buf, "%s/%ld", base, tid);
8652 name = (char *) bfd_alloc (abfd, strlen (buf) + 1);
8657 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
8661 sect->size = note->descsz;
8662 sect->filepos = note->descpos;
8663 sect->alignment_power = 2;
8665 /* This is the current thread. */
8666 if (elf_tdata (abfd)->core_lwpid == tid)
8667 return elfcore_maybe_make_sect (abfd, base, sect);
8672 #define BFD_QNT_CORE_INFO 7
8673 #define BFD_QNT_CORE_STATUS 8
8674 #define BFD_QNT_CORE_GREG 9
8675 #define BFD_QNT_CORE_FPREG 10
8678 elfcore_grok_nto_note (bfd *abfd, Elf_Internal_Note *note)
8680 /* Every GREG section has a STATUS section before it. Store the
8681 tid from the previous call to pass down to the next gregs
8683 static long tid = 1;
8687 case BFD_QNT_CORE_INFO:
8688 return elfcore_make_note_pseudosection (abfd, ".qnx_core_info", note);
8689 case BFD_QNT_CORE_STATUS:
8690 return elfcore_grok_nto_status (abfd, note, &tid);
8691 case BFD_QNT_CORE_GREG:
8692 return elfcore_grok_nto_regs (abfd, note, tid, ".reg");
8693 case BFD_QNT_CORE_FPREG:
8694 return elfcore_grok_nto_regs (abfd, note, tid, ".reg2");
8701 elfcore_grok_spu_note (bfd *abfd, Elf_Internal_Note *note)
8707 /* Use note name as section name. */
8709 name = (char *) bfd_alloc (abfd, len);
8712 memcpy (name, note->namedata, len);
8713 name[len - 1] = '\0';
8715 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
8719 sect->size = note->descsz;
8720 sect->filepos = note->descpos;
8721 sect->alignment_power = 1;
8726 /* Function: elfcore_write_note
8729 buffer to hold note, and current size of buffer
8733 size of data for note
8735 Writes note to end of buffer. ELF64 notes are written exactly as
8736 for ELF32, despite the current (as of 2006) ELF gabi specifying
8737 that they ought to have 8-byte namesz and descsz field, and have
8738 8-byte alignment. Other writers, eg. Linux kernel, do the same.
8741 Pointer to realloc'd buffer, *BUFSIZ updated. */
8744 elfcore_write_note (bfd *abfd,
8752 Elf_External_Note *xnp;
8759 namesz = strlen (name) + 1;
8761 newspace = 12 + ((namesz + 3) & -4) + ((size + 3) & -4);
8763 buf = (char *) realloc (buf, *bufsiz + newspace);
8766 dest = buf + *bufsiz;
8767 *bufsiz += newspace;
8768 xnp = (Elf_External_Note *) dest;
8769 H_PUT_32 (abfd, namesz, xnp->namesz);
8770 H_PUT_32 (abfd, size, xnp->descsz);
8771 H_PUT_32 (abfd, type, xnp->type);
8775 memcpy (dest, name, namesz);
8783 memcpy (dest, input, size);
8793 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
8795 elfcore_write_prpsinfo (bfd *abfd,
8801 const char *note_name = "CORE";
8802 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8804 if (bed->elf_backend_write_core_note != NULL)
8807 ret = (*bed->elf_backend_write_core_note) (abfd, buf, bufsiz,
8808 NT_PRPSINFO, fname, psargs);
8813 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
8814 if (bed->s->elfclass == ELFCLASS32)
8816 #if defined (HAVE_PSINFO32_T)
8818 int note_type = NT_PSINFO;
8821 int note_type = NT_PRPSINFO;
8824 memset (&data, 0, sizeof (data));
8825 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
8826 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
8827 return elfcore_write_note (abfd, buf, bufsiz,
8828 note_name, note_type, &data, sizeof (data));
8833 #if defined (HAVE_PSINFO_T)
8835 int note_type = NT_PSINFO;
8838 int note_type = NT_PRPSINFO;
8841 memset (&data, 0, sizeof (data));
8842 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
8843 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
8844 return elfcore_write_note (abfd, buf, bufsiz,
8845 note_name, note_type, &data, sizeof (data));
8848 #endif /* PSINFO_T or PRPSINFO_T */
8850 #if defined (HAVE_PRSTATUS_T)
8852 elfcore_write_prstatus (bfd *abfd,
8859 const char *note_name = "CORE";
8860 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8862 if (bed->elf_backend_write_core_note != NULL)
8865 ret = (*bed->elf_backend_write_core_note) (abfd, buf, bufsiz,
8867 pid, cursig, gregs);
8872 #if defined (HAVE_PRSTATUS32_T)
8873 if (bed->s->elfclass == ELFCLASS32)
8875 prstatus32_t prstat;
8877 memset (&prstat, 0, sizeof (prstat));
8878 prstat.pr_pid = pid;
8879 prstat.pr_cursig = cursig;
8880 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
8881 return elfcore_write_note (abfd, buf, bufsiz, note_name,
8882 NT_PRSTATUS, &prstat, sizeof (prstat));
8889 memset (&prstat, 0, sizeof (prstat));
8890 prstat.pr_pid = pid;
8891 prstat.pr_cursig = cursig;
8892 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
8893 return elfcore_write_note (abfd, buf, bufsiz, note_name,
8894 NT_PRSTATUS, &prstat, sizeof (prstat));
8897 #endif /* HAVE_PRSTATUS_T */
8899 #if defined (HAVE_LWPSTATUS_T)
8901 elfcore_write_lwpstatus (bfd *abfd,
8908 lwpstatus_t lwpstat;
8909 const char *note_name = "CORE";
8911 memset (&lwpstat, 0, sizeof (lwpstat));
8912 lwpstat.pr_lwpid = pid >> 16;
8913 lwpstat.pr_cursig = cursig;
8914 #if defined (HAVE_LWPSTATUS_T_PR_REG)
8915 memcpy (lwpstat.pr_reg, gregs, sizeof (lwpstat.pr_reg));
8916 #elif defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
8918 memcpy (lwpstat.pr_context.uc_mcontext.gregs,
8919 gregs, sizeof (lwpstat.pr_context.uc_mcontext.gregs));
8921 memcpy (lwpstat.pr_context.uc_mcontext.__gregs,
8922 gregs, sizeof (lwpstat.pr_context.uc_mcontext.__gregs));
8925 return elfcore_write_note (abfd, buf, bufsiz, note_name,
8926 NT_LWPSTATUS, &lwpstat, sizeof (lwpstat));
8928 #endif /* HAVE_LWPSTATUS_T */
8930 #if defined (HAVE_PSTATUS_T)
8932 elfcore_write_pstatus (bfd *abfd,
8936 int cursig ATTRIBUTE_UNUSED,
8937 const void *gregs ATTRIBUTE_UNUSED)
8939 const char *note_name = "CORE";
8940 #if defined (HAVE_PSTATUS32_T)
8941 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8943 if (bed->s->elfclass == ELFCLASS32)
8947 memset (&pstat, 0, sizeof (pstat));
8948 pstat.pr_pid = pid & 0xffff;
8949 buf = elfcore_write_note (abfd, buf, bufsiz, note_name,
8950 NT_PSTATUS, &pstat, sizeof (pstat));
8958 memset (&pstat, 0, sizeof (pstat));
8959 pstat.pr_pid = pid & 0xffff;
8960 buf = elfcore_write_note (abfd, buf, bufsiz, note_name,
8961 NT_PSTATUS, &pstat, sizeof (pstat));
8965 #endif /* HAVE_PSTATUS_T */
8968 elfcore_write_prfpreg (bfd *abfd,
8974 const char *note_name = "CORE";
8975 return elfcore_write_note (abfd, buf, bufsiz,
8976 note_name, NT_FPREGSET, fpregs, size);
8980 elfcore_write_prxfpreg (bfd *abfd,
8983 const void *xfpregs,
8986 char *note_name = "LINUX";
8987 return elfcore_write_note (abfd, buf, bufsiz,
8988 note_name, NT_PRXFPREG, xfpregs, size);
8992 elfcore_write_xstatereg (bfd *abfd, char *buf, int *bufsiz,
8993 const void *xfpregs, int size)
8995 char *note_name = "LINUX";
8996 return elfcore_write_note (abfd, buf, bufsiz,
8997 note_name, NT_X86_XSTATE, xfpregs, size);
9001 elfcore_write_ppc_vmx (bfd *abfd,
9004 const void *ppc_vmx,
9007 char *note_name = "LINUX";
9008 return elfcore_write_note (abfd, buf, bufsiz,
9009 note_name, NT_PPC_VMX, ppc_vmx, size);
9013 elfcore_write_ppc_vsx (bfd *abfd,
9016 const void *ppc_vsx,
9019 char *note_name = "LINUX";
9020 return elfcore_write_note (abfd, buf, bufsiz,
9021 note_name, NT_PPC_VSX, ppc_vsx, size);
9025 elfcore_write_s390_high_gprs (bfd *abfd,
9028 const void *s390_high_gprs,
9031 char *note_name = "LINUX";
9032 return elfcore_write_note (abfd, buf, bufsiz,
9033 note_name, NT_S390_HIGH_GPRS,
9034 s390_high_gprs, size);
9038 elfcore_write_s390_timer (bfd *abfd,
9041 const void *s390_timer,
9044 char *note_name = "LINUX";
9045 return elfcore_write_note (abfd, buf, bufsiz,
9046 note_name, NT_S390_TIMER, s390_timer, size);
9050 elfcore_write_s390_todcmp (bfd *abfd,
9053 const void *s390_todcmp,
9056 char *note_name = "LINUX";
9057 return elfcore_write_note (abfd, buf, bufsiz,
9058 note_name, NT_S390_TODCMP, s390_todcmp, size);
9062 elfcore_write_s390_todpreg (bfd *abfd,
9065 const void *s390_todpreg,
9068 char *note_name = "LINUX";
9069 return elfcore_write_note (abfd, buf, bufsiz,
9070 note_name, NT_S390_TODPREG, s390_todpreg, size);
9074 elfcore_write_s390_ctrs (bfd *abfd,
9077 const void *s390_ctrs,
9080 char *note_name = "LINUX";
9081 return elfcore_write_note (abfd, buf, bufsiz,
9082 note_name, NT_S390_CTRS, s390_ctrs, size);
9086 elfcore_write_s390_prefix (bfd *abfd,
9089 const void *s390_prefix,
9092 char *note_name = "LINUX";
9093 return elfcore_write_note (abfd, buf, bufsiz,
9094 note_name, NT_S390_PREFIX, s390_prefix, size);
9098 elfcore_write_register_note (bfd *abfd,
9101 const char *section,
9105 if (strcmp (section, ".reg2") == 0)
9106 return elfcore_write_prfpreg (abfd, buf, bufsiz, data, size);
9107 if (strcmp (section, ".reg-xfp") == 0)
9108 return elfcore_write_prxfpreg (abfd, buf, bufsiz, data, size);
9109 if (strcmp (section, ".reg-xstate") == 0)
9110 return elfcore_write_xstatereg (abfd, buf, bufsiz, data, size);
9111 if (strcmp (section, ".reg-ppc-vmx") == 0)
9112 return elfcore_write_ppc_vmx (abfd, buf, bufsiz, data, size);
9113 if (strcmp (section, ".reg-ppc-vsx") == 0)
9114 return elfcore_write_ppc_vsx (abfd, buf, bufsiz, data, size);
9115 if (strcmp (section, ".reg-s390-high-gprs") == 0)
9116 return elfcore_write_s390_high_gprs (abfd, buf, bufsiz, data, size);
9117 if (strcmp (section, ".reg-s390-timer") == 0)
9118 return elfcore_write_s390_timer (abfd, buf, bufsiz, data, size);
9119 if (strcmp (section, ".reg-s390-todcmp") == 0)
9120 return elfcore_write_s390_todcmp (abfd, buf, bufsiz, data, size);
9121 if (strcmp (section, ".reg-s390-todpreg") == 0)
9122 return elfcore_write_s390_todpreg (abfd, buf, bufsiz, data, size);
9123 if (strcmp (section, ".reg-s390-ctrs") == 0)
9124 return elfcore_write_s390_ctrs (abfd, buf, bufsiz, data, size);
9125 if (strcmp (section, ".reg-s390-prefix") == 0)
9126 return elfcore_write_s390_prefix (abfd, buf, bufsiz, data, size);
9131 elf_parse_notes (bfd *abfd, char *buf, size_t size, file_ptr offset)
9136 while (p < buf + size)
9138 /* FIXME: bad alignment assumption. */
9139 Elf_External_Note *xnp = (Elf_External_Note *) p;
9140 Elf_Internal_Note in;
9142 if (offsetof (Elf_External_Note, name) > buf - p + size)
9145 in.type = H_GET_32 (abfd, xnp->type);
9147 in.namesz = H_GET_32 (abfd, xnp->namesz);
9148 in.namedata = xnp->name;
9149 if (in.namesz > buf - in.namedata + size)
9152 in.descsz = H_GET_32 (abfd, xnp->descsz);
9153 in.descdata = in.namedata + BFD_ALIGN (in.namesz, 4);
9154 in.descpos = offset + (in.descdata - buf);
9156 && (in.descdata >= buf + size
9157 || in.descsz > buf - in.descdata + size))
9160 switch (bfd_get_format (abfd))
9166 if (CONST_STRNEQ (in.namedata, "NetBSD-CORE"))
9168 if (! elfcore_grok_netbsd_note (abfd, &in))
9171 else if (CONST_STRNEQ (in.namedata, "OpenBSD"))
9173 if (! elfcore_grok_openbsd_note (abfd, &in))
9176 else if (CONST_STRNEQ (in.namedata, "QNX"))
9178 if (! elfcore_grok_nto_note (abfd, &in))
9181 else if (CONST_STRNEQ (in.namedata, "SPU/"))
9183 if (! elfcore_grok_spu_note (abfd, &in))
9188 if (! elfcore_grok_note (abfd, &in))
9194 if (in.namesz == sizeof "GNU" && strcmp (in.namedata, "GNU") == 0)
9196 if (! elfobj_grok_gnu_note (abfd, &in))
9202 p = in.descdata + BFD_ALIGN (in.descsz, 4);
9209 elf_read_notes (bfd *abfd, file_ptr offset, bfd_size_type size)
9216 if (bfd_seek (abfd, offset, SEEK_SET) != 0)
9219 buf = (char *) bfd_malloc (size);
9223 if (bfd_bread (buf, size, abfd) != size
9224 || !elf_parse_notes (abfd, buf, size, offset))
9234 /* Providing external access to the ELF program header table. */
9236 /* Return an upper bound on the number of bytes required to store a
9237 copy of ABFD's program header table entries. Return -1 if an error
9238 occurs; bfd_get_error will return an appropriate code. */
9241 bfd_get_elf_phdr_upper_bound (bfd *abfd)
9243 if (abfd->xvec->flavour != bfd_target_elf_flavour)
9245 bfd_set_error (bfd_error_wrong_format);
9249 return elf_elfheader (abfd)->e_phnum * sizeof (Elf_Internal_Phdr);
9252 /* Copy ABFD's program header table entries to *PHDRS. The entries
9253 will be stored as an array of Elf_Internal_Phdr structures, as
9254 defined in include/elf/internal.h. To find out how large the
9255 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
9257 Return the number of program header table entries read, or -1 if an
9258 error occurs; bfd_get_error will return an appropriate code. */
9261 bfd_get_elf_phdrs (bfd *abfd, void *phdrs)
9265 if (abfd->xvec->flavour != bfd_target_elf_flavour)
9267 bfd_set_error (bfd_error_wrong_format);
9271 num_phdrs = elf_elfheader (abfd)->e_phnum;
9272 memcpy (phdrs, elf_tdata (abfd)->phdr,
9273 num_phdrs * sizeof (Elf_Internal_Phdr));
9278 enum elf_reloc_type_class
9279 _bfd_elf_reloc_type_class (const Elf_Internal_Rela *rela ATTRIBUTE_UNUSED)
9281 return reloc_class_normal;
9284 /* For RELA architectures, return the relocation value for a
9285 relocation against a local symbol. */
9288 _bfd_elf_rela_local_sym (bfd *abfd,
9289 Elf_Internal_Sym *sym,
9291 Elf_Internal_Rela *rel)
9293 asection *sec = *psec;
9296 relocation = (sec->output_section->vma
9297 + sec->output_offset
9299 if ((sec->flags & SEC_MERGE)
9300 && ELF_ST_TYPE (sym->st_info) == STT_SECTION
9301 && sec->sec_info_type == ELF_INFO_TYPE_MERGE)
9304 _bfd_merged_section_offset (abfd, psec,
9305 elf_section_data (sec)->sec_info,
9306 sym->st_value + rel->r_addend);
9309 /* If we have changed the section, and our original section is
9310 marked with SEC_EXCLUDE, it means that the original
9311 SEC_MERGE section has been completely subsumed in some
9312 other SEC_MERGE section. In this case, we need to leave
9313 some info around for --emit-relocs. */
9314 if ((sec->flags & SEC_EXCLUDE) != 0)
9315 sec->kept_section = *psec;
9318 rel->r_addend -= relocation;
9319 rel->r_addend += sec->output_section->vma + sec->output_offset;
9325 _bfd_elf_rel_local_sym (bfd *abfd,
9326 Elf_Internal_Sym *sym,
9330 asection *sec = *psec;
9332 if (sec->sec_info_type != ELF_INFO_TYPE_MERGE)
9333 return sym->st_value + addend;
9335 return _bfd_merged_section_offset (abfd, psec,
9336 elf_section_data (sec)->sec_info,
9337 sym->st_value + addend);
9341 _bfd_elf_section_offset (bfd *abfd,
9342 struct bfd_link_info *info,
9346 switch (sec->sec_info_type)
9348 case ELF_INFO_TYPE_STABS:
9349 return _bfd_stab_section_offset (sec, elf_section_data (sec)->sec_info,
9351 case ELF_INFO_TYPE_EH_FRAME:
9352 return _bfd_elf_eh_frame_section_offset (abfd, info, sec, offset);
9358 /* Create a new BFD as if by bfd_openr. Rather than opening a file,
9359 reconstruct an ELF file by reading the segments out of remote memory
9360 based on the ELF file header at EHDR_VMA and the ELF program headers it
9361 points to. If not null, *LOADBASEP is filled in with the difference
9362 between the VMAs from which the segments were read, and the VMAs the
9363 file headers (and hence BFD's idea of each section's VMA) put them at.
9365 The function TARGET_READ_MEMORY is called to copy LEN bytes from the
9366 remote memory at target address VMA into the local buffer at MYADDR; it
9367 should return zero on success or an `errno' code on failure. TEMPL must
9368 be a BFD for an ELF target with the word size and byte order found in
9369 the remote memory. */
9372 bfd_elf_bfd_from_remote_memory
9376 int (*target_read_memory) (bfd_vma, bfd_byte *, int))
9378 return (*get_elf_backend_data (templ)->elf_backend_bfd_from_remote_memory)
9379 (templ, ehdr_vma, loadbasep, target_read_memory);
9383 _bfd_elf_get_synthetic_symtab (bfd *abfd,
9384 long symcount ATTRIBUTE_UNUSED,
9385 asymbol **syms ATTRIBUTE_UNUSED,
9390 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
9393 const char *relplt_name;
9394 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
9398 Elf_Internal_Shdr *hdr;
9404 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
9407 if (dynsymcount <= 0)
9410 if (!bed->plt_sym_val)
9413 relplt_name = bed->relplt_name;
9414 if (relplt_name == NULL)
9415 relplt_name = bed->rela_plts_and_copies_p ? ".rela.plt" : ".rel.plt";
9416 relplt = bfd_get_section_by_name (abfd, relplt_name);
9420 hdr = &elf_section_data (relplt)->this_hdr;
9421 if (hdr->sh_link != elf_dynsymtab (abfd)
9422 || (hdr->sh_type != SHT_REL && hdr->sh_type != SHT_RELA))
9425 plt = bfd_get_section_by_name (abfd, ".plt");
9429 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
9430 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
9433 count = relplt->size / hdr->sh_entsize;
9434 size = count * sizeof (asymbol);
9435 p = relplt->relocation;
9436 for (i = 0; i < count; i++, p += bed->s->int_rels_per_ext_rel)
9438 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
9442 size += sizeof ("+0x") - 1 + 8 + 8 * (bed->s->elfclass == ELFCLASS64);
9444 size += sizeof ("+0x") - 1 + 8;
9449 s = *ret = (asymbol *) bfd_malloc (size);
9453 names = (char *) (s + count);
9454 p = relplt->relocation;
9456 for (i = 0; i < count; i++, p += bed->s->int_rels_per_ext_rel)
9461 addr = bed->plt_sym_val (i, plt, p);
9462 if (addr == (bfd_vma) -1)
9465 *s = **p->sym_ptr_ptr;
9466 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
9467 we are defining a symbol, ensure one of them is set. */
9468 if ((s->flags & BSF_LOCAL) == 0)
9469 s->flags |= BSF_GLOBAL;
9470 s->flags |= BSF_SYNTHETIC;
9472 s->value = addr - plt->vma;
9475 len = strlen ((*p->sym_ptr_ptr)->name);
9476 memcpy (names, (*p->sym_ptr_ptr)->name, len);
9482 memcpy (names, "+0x", sizeof ("+0x") - 1);
9483 names += sizeof ("+0x") - 1;
9484 bfd_sprintf_vma (abfd, buf, p->addend);
9485 for (a = buf; *a == '0'; ++a)
9488 memcpy (names, a, len);
9491 memcpy (names, "@plt", sizeof ("@plt"));
9492 names += sizeof ("@plt");
9499 /* It is only used by x86-64 so far. */
9500 asection _bfd_elf_large_com_section
9501 = BFD_FAKE_SECTION (_bfd_elf_large_com_section,
9502 SEC_IS_COMMON, NULL, "LARGE_COMMON", 0);
9505 _bfd_elf_set_osabi (bfd * abfd,
9506 struct bfd_link_info * link_info ATTRIBUTE_UNUSED)
9508 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
9510 i_ehdrp = elf_elfheader (abfd);
9512 i_ehdrp->e_ident[EI_OSABI] = get_elf_backend_data (abfd)->elf_osabi;
9514 /* To make things simpler for the loader on Linux systems we set the
9515 osabi field to ELFOSABI_LINUX if the binary contains symbols of
9516 the STT_GNU_IFUNC type or STB_GNU_UNIQUE binding. */
9517 if (i_ehdrp->e_ident[EI_OSABI] == ELFOSABI_NONE
9518 && elf_tdata (abfd)->has_gnu_symbols)
9519 i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_LINUX;
9523 /* Return TRUE for ELF symbol types that represent functions.
9524 This is the default version of this function, which is sufficient for
9525 most targets. It returns true if TYPE is STT_FUNC or STT_GNU_IFUNC. */
9528 _bfd_elf_is_function_type (unsigned int type)
9530 return (type == STT_FUNC
9531 || type == STT_GNU_IFUNC);