1 /* ELF executable support for BFD.
2 Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001
3 Free Software Foundation, Inc.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
26 BFD support for ELF formats is being worked on.
27 Currently, the best supported back ends are for sparc and i386
28 (running svr4 or Solaris 2).
30 Documentation of the internals of the support code still needs
31 to be written. The code is changing quickly enough that we
35 /* For sparc64-cross-sparc32. */
43 #include "libiberty.h"
45 static INLINE struct elf_segment_map *make_mapping
46 PARAMS ((bfd *, asection **, unsigned int, unsigned int, boolean));
47 static boolean map_sections_to_segments PARAMS ((bfd *));
48 static int elf_sort_sections PARAMS ((const PTR, const PTR));
49 static boolean assign_file_positions_for_segments PARAMS ((bfd *));
50 static boolean assign_file_positions_except_relocs PARAMS ((bfd *));
51 static boolean prep_headers PARAMS ((bfd *));
52 static boolean swap_out_syms PARAMS ((bfd *, struct bfd_strtab_hash **, int));
53 static boolean copy_private_bfd_data PARAMS ((bfd *, bfd *));
54 static char *elf_read PARAMS ((bfd *, file_ptr, bfd_size_type));
55 static boolean setup_group PARAMS ((bfd *, Elf_Internal_Shdr *, asection *));
56 static void elf_fake_sections PARAMS ((bfd *, asection *, PTR));
57 static void set_group_contents PARAMS ((bfd *, asection *, PTR));
58 static boolean assign_section_numbers PARAMS ((bfd *));
59 static INLINE int sym_is_global PARAMS ((bfd *, asymbol *));
60 static boolean elf_map_symbols PARAMS ((bfd *));
61 static bfd_size_type get_program_header_size PARAMS ((bfd *));
62 static boolean elfcore_read_notes PARAMS ((bfd *, file_ptr, bfd_size_type));
63 static boolean elf_find_function PARAMS ((bfd *, asection *, asymbol **,
64 bfd_vma, const char **,
66 static int elfcore_make_pid PARAMS ((bfd *));
67 static boolean elfcore_maybe_make_sect PARAMS ((bfd *, char *, asection *));
68 static boolean elfcore_make_note_pseudosection PARAMS ((bfd *, char *,
69 Elf_Internal_Note *));
70 static boolean elfcore_grok_prfpreg PARAMS ((bfd *, Elf_Internal_Note *));
71 static boolean elfcore_grok_prxfpreg PARAMS ((bfd *, Elf_Internal_Note *));
72 static boolean elfcore_grok_note PARAMS ((bfd *, Elf_Internal_Note *));
74 /* Swap version information in and out. The version information is
75 currently size independent. If that ever changes, this code will
76 need to move into elfcode.h. */
78 /* Swap in a Verdef structure. */
81 _bfd_elf_swap_verdef_in (abfd, src, dst)
83 const Elf_External_Verdef *src;
84 Elf_Internal_Verdef *dst;
86 dst->vd_version = H_GET_16 (abfd, src->vd_version);
87 dst->vd_flags = H_GET_16 (abfd, src->vd_flags);
88 dst->vd_ndx = H_GET_16 (abfd, src->vd_ndx);
89 dst->vd_cnt = H_GET_16 (abfd, src->vd_cnt);
90 dst->vd_hash = H_GET_32 (abfd, src->vd_hash);
91 dst->vd_aux = H_GET_32 (abfd, src->vd_aux);
92 dst->vd_next = H_GET_32 (abfd, src->vd_next);
95 /* Swap out a Verdef structure. */
98 _bfd_elf_swap_verdef_out (abfd, src, dst)
100 const Elf_Internal_Verdef *src;
101 Elf_External_Verdef *dst;
103 H_PUT_16 (abfd, src->vd_version, dst->vd_version);
104 H_PUT_16 (abfd, src->vd_flags, dst->vd_flags);
105 H_PUT_16 (abfd, src->vd_ndx, dst->vd_ndx);
106 H_PUT_16 (abfd, src->vd_cnt, dst->vd_cnt);
107 H_PUT_32 (abfd, src->vd_hash, dst->vd_hash);
108 H_PUT_32 (abfd, src->vd_aux, dst->vd_aux);
109 H_PUT_32 (abfd, src->vd_next, dst->vd_next);
112 /* Swap in a Verdaux structure. */
115 _bfd_elf_swap_verdaux_in (abfd, src, dst)
117 const Elf_External_Verdaux *src;
118 Elf_Internal_Verdaux *dst;
120 dst->vda_name = H_GET_32 (abfd, src->vda_name);
121 dst->vda_next = H_GET_32 (abfd, src->vda_next);
124 /* Swap out a Verdaux structure. */
127 _bfd_elf_swap_verdaux_out (abfd, src, dst)
129 const Elf_Internal_Verdaux *src;
130 Elf_External_Verdaux *dst;
132 H_PUT_32 (abfd, src->vda_name, dst->vda_name);
133 H_PUT_32 (abfd, src->vda_next, dst->vda_next);
136 /* Swap in a Verneed structure. */
139 _bfd_elf_swap_verneed_in (abfd, src, dst)
141 const Elf_External_Verneed *src;
142 Elf_Internal_Verneed *dst;
144 dst->vn_version = H_GET_16 (abfd, src->vn_version);
145 dst->vn_cnt = H_GET_16 (abfd, src->vn_cnt);
146 dst->vn_file = H_GET_32 (abfd, src->vn_file);
147 dst->vn_aux = H_GET_32 (abfd, src->vn_aux);
148 dst->vn_next = H_GET_32 (abfd, src->vn_next);
151 /* Swap out a Verneed structure. */
154 _bfd_elf_swap_verneed_out (abfd, src, dst)
156 const Elf_Internal_Verneed *src;
157 Elf_External_Verneed *dst;
159 H_PUT_16 (abfd, src->vn_version, dst->vn_version);
160 H_PUT_16 (abfd, src->vn_cnt, dst->vn_cnt);
161 H_PUT_32 (abfd, src->vn_file, dst->vn_file);
162 H_PUT_32 (abfd, src->vn_aux, dst->vn_aux);
163 H_PUT_32 (abfd, src->vn_next, dst->vn_next);
166 /* Swap in a Vernaux structure. */
169 _bfd_elf_swap_vernaux_in (abfd, src, dst)
171 const Elf_External_Vernaux *src;
172 Elf_Internal_Vernaux *dst;
174 dst->vna_hash = H_GET_32 (abfd, src->vna_hash);
175 dst->vna_flags = H_GET_16 (abfd, src->vna_flags);
176 dst->vna_other = H_GET_16 (abfd, src->vna_other);
177 dst->vna_name = H_GET_32 (abfd, src->vna_name);
178 dst->vna_next = H_GET_32 (abfd, src->vna_next);
181 /* Swap out a Vernaux structure. */
184 _bfd_elf_swap_vernaux_out (abfd, src, dst)
186 const Elf_Internal_Vernaux *src;
187 Elf_External_Vernaux *dst;
189 H_PUT_32 (abfd, src->vna_hash, dst->vna_hash);
190 H_PUT_16 (abfd, src->vna_flags, dst->vna_flags);
191 H_PUT_16 (abfd, src->vna_other, dst->vna_other);
192 H_PUT_32 (abfd, src->vna_name, dst->vna_name);
193 H_PUT_32 (abfd, src->vna_next, dst->vna_next);
196 /* Swap in a Versym structure. */
199 _bfd_elf_swap_versym_in (abfd, src, dst)
201 const Elf_External_Versym *src;
202 Elf_Internal_Versym *dst;
204 dst->vs_vers = H_GET_16 (abfd, src->vs_vers);
207 /* Swap out a Versym structure. */
210 _bfd_elf_swap_versym_out (abfd, src, dst)
212 const Elf_Internal_Versym *src;
213 Elf_External_Versym *dst;
215 H_PUT_16 (abfd, src->vs_vers, dst->vs_vers);
218 /* Standard ELF hash function. Do not change this function; you will
219 cause invalid hash tables to be generated. */
222 bfd_elf_hash (namearg)
225 const unsigned char *name = (const unsigned char *) namearg;
230 while ((ch = *name++) != '\0')
233 if ((g = (h & 0xf0000000)) != 0)
236 /* The ELF ABI says `h &= ~g', but this is equivalent in
237 this case and on some machines one insn instead of two. */
244 /* Read a specified number of bytes at a specified offset in an ELF
245 file, into a newly allocated buffer, and return a pointer to the
249 elf_read (abfd, offset, size)
256 if ((buf = bfd_alloc (abfd, size)) == NULL)
258 if (bfd_seek (abfd, offset, SEEK_SET) != 0)
260 if (bfd_bread ((PTR) buf, size, abfd) != size)
262 if (bfd_get_error () != bfd_error_system_call)
263 bfd_set_error (bfd_error_file_truncated);
270 bfd_elf_mkobject (abfd)
273 /* This just does initialization. */
274 /* coff_mkobject zalloc's space for tdata.coff_obj_data ... */
275 bfd_size_type amt = sizeof (struct elf_obj_tdata);
276 elf_tdata (abfd) = (struct elf_obj_tdata *) bfd_zalloc (abfd, amt);
277 if (elf_tdata (abfd) == 0)
279 /* Since everything is done at close time, do we need any
286 bfd_elf_mkcorefile (abfd)
289 /* I think this can be done just like an object file. */
290 return bfd_elf_mkobject (abfd);
294 bfd_elf_get_str_section (abfd, shindex)
296 unsigned int shindex;
298 Elf_Internal_Shdr **i_shdrp;
299 char *shstrtab = NULL;
301 bfd_size_type shstrtabsize;
303 i_shdrp = elf_elfsections (abfd);
304 if (i_shdrp == 0 || i_shdrp[shindex] == 0)
307 shstrtab = (char *) i_shdrp[shindex]->contents;
308 if (shstrtab == NULL)
310 /* No cached one, attempt to read, and cache what we read. */
311 offset = i_shdrp[shindex]->sh_offset;
312 shstrtabsize = i_shdrp[shindex]->sh_size;
313 shstrtab = elf_read (abfd, offset, shstrtabsize);
314 i_shdrp[shindex]->contents = (PTR) shstrtab;
320 bfd_elf_string_from_elf_section (abfd, shindex, strindex)
322 unsigned int shindex;
323 unsigned int strindex;
325 Elf_Internal_Shdr *hdr;
330 hdr = elf_elfsections (abfd)[shindex];
332 if (hdr->contents == NULL
333 && bfd_elf_get_str_section (abfd, shindex) == NULL)
336 if (strindex >= hdr->sh_size)
338 (*_bfd_error_handler)
339 (_("%s: invalid string offset %u >= %lu for section `%s'"),
340 bfd_archive_filename (abfd), strindex, (unsigned long) hdr->sh_size,
341 ((shindex == elf_elfheader(abfd)->e_shstrndx
342 && strindex == hdr->sh_name)
344 : elf_string_from_elf_strtab (abfd, hdr->sh_name)));
348 return ((char *) hdr->contents) + strindex;
351 /* Elf_Internal_Shdr->contents is an array of these for SHT_GROUP
352 sections. The first element is the flags, the rest are section
355 typedef union elf_internal_group {
356 Elf_Internal_Shdr *shdr;
358 } Elf_Internal_Group;
360 /* Set next_in_group list pointer, and group name for NEWSECT. */
363 setup_group (abfd, hdr, newsect)
365 Elf_Internal_Shdr *hdr;
368 unsigned int num_group = elf_tdata (abfd)->num_group;
370 /* If num_group is zero, read in all SHT_GROUP sections. The count
371 is set to -1 if there are no SHT_GROUP sections. */
374 unsigned int i, shnum;
376 /* First count the number of groups. If we have a SHT_GROUP
377 section with just a flag word (ie. sh_size is 4), ignore it. */
378 shnum = elf_elfheader (abfd)->e_shnum;
380 for (i = 0; i < shnum; i++)
382 Elf_Internal_Shdr *shdr = elf_elfsections (abfd)[i];
383 if (shdr->sh_type == SHT_GROUP && shdr->sh_size >= 8)
388 num_group = (unsigned) -1;
389 elf_tdata (abfd)->num_group = num_group;
393 /* We keep a list of elf section headers for group sections,
394 so we can find them quickly. */
395 bfd_size_type amt = num_group * sizeof (Elf_Internal_Shdr *);
396 elf_tdata (abfd)->group_sect_ptr = bfd_alloc (abfd, amt);
397 if (elf_tdata (abfd)->group_sect_ptr == NULL)
401 for (i = 0; i < shnum; i++)
403 Elf_Internal_Shdr *shdr = elf_elfsections (abfd)[i];
404 if (shdr->sh_type == SHT_GROUP && shdr->sh_size >= 8)
407 Elf_Internal_Group *dest;
409 /* Add to list of sections. */
410 elf_tdata (abfd)->group_sect_ptr[num_group] = shdr;
413 /* Read the raw contents. */
414 BFD_ASSERT (sizeof (*dest) >= 4);
415 amt = shdr->sh_size * sizeof (*dest) / 4;
416 shdr->contents = bfd_alloc (abfd, amt);
417 if (shdr->contents == NULL
418 || bfd_seek (abfd, shdr->sh_offset, SEEK_SET) != 0
419 || (bfd_bread (shdr->contents, shdr->sh_size, abfd)
423 /* Translate raw contents, a flag word followed by an
424 array of elf section indices all in target byte order,
425 to the flag word followed by an array of elf section
427 src = shdr->contents + shdr->sh_size;
428 dest = (Elf_Internal_Group *) (shdr->contents + amt);
435 idx = H_GET_32 (abfd, src);
436 if (src == shdr->contents)
443 ((*_bfd_error_handler)
444 (_("%s: invalid SHT_GROUP entry"),
445 bfd_archive_filename (abfd)));
448 dest->shdr = elf_elfsections (abfd)[idx];
455 if (num_group != (unsigned) -1)
459 for (i = 0; i < num_group; i++)
461 Elf_Internal_Shdr *shdr = elf_tdata (abfd)->group_sect_ptr[i];
462 Elf_Internal_Group *idx = (Elf_Internal_Group *) shdr->contents;
463 unsigned int n_elt = shdr->sh_size / 4;
465 /* Look through this group's sections to see if current
466 section is a member. */
468 if ((++idx)->shdr == hdr)
472 /* We are a member of this group. Go looking through
473 other members to see if any others are linked via
475 idx = (Elf_Internal_Group *) shdr->contents;
476 n_elt = shdr->sh_size / 4;
478 if ((s = (++idx)->shdr->bfd_section) != NULL
479 && elf_next_in_group (s) != NULL)
483 /* Snarf the group name from other member, and
484 insert current section in circular list. */
485 elf_group_name (newsect) = elf_group_name (s);
486 elf_next_in_group (newsect) = elf_next_in_group (s);
487 elf_next_in_group (s) = newsect;
491 struct elf_backend_data *bed;
493 unsigned char ename[4];
497 /* Humbug. Get the name from the group signature
498 symbol. Why isn't the signature just a string?
499 Fortunately, the name index is at the same
500 place in the external symbol for both 32 and 64
502 bed = get_elf_backend_data (abfd);
503 pos = elf_tdata (abfd)->symtab_hdr.sh_offset;
504 pos += shdr->sh_info * bed->s->sizeof_sym;
505 if (bfd_seek (abfd, pos, SEEK_SET) != 0
506 || bfd_bread (ename, (bfd_size_type) 4, abfd) != 4)
508 iname = H_GET_32 (abfd, ename);
509 gname = elf_string_from_elf_strtab (abfd, iname);
510 elf_group_name (newsect) = gname;
512 /* Start a circular list with one element. */
513 elf_next_in_group (newsect) = newsect;
515 if (shdr->bfd_section != NULL)
516 elf_next_in_group (shdr->bfd_section) = newsect;
523 if (elf_group_name (newsect) == NULL)
525 (*_bfd_error_handler) (_("%s: no group info for section %s"),
526 bfd_archive_filename (abfd), newsect->name);
531 /* Make a BFD section from an ELF section. We store a pointer to the
532 BFD section in the bfd_section field of the header. */
535 _bfd_elf_make_section_from_shdr (abfd, hdr, name)
537 Elf_Internal_Shdr *hdr;
542 struct elf_backend_data *bed;
544 if (hdr->bfd_section != NULL)
546 BFD_ASSERT (strcmp (name,
547 bfd_get_section_name (abfd, hdr->bfd_section)) == 0);
551 newsect = bfd_make_section_anyway (abfd, name);
555 newsect->filepos = hdr->sh_offset;
557 if (! bfd_set_section_vma (abfd, newsect, hdr->sh_addr)
558 || ! bfd_set_section_size (abfd, newsect, hdr->sh_size)
559 || ! bfd_set_section_alignment (abfd, newsect,
560 bfd_log2 ((bfd_vma) hdr->sh_addralign)))
563 flags = SEC_NO_FLAGS;
564 if (hdr->sh_type != SHT_NOBITS)
565 flags |= SEC_HAS_CONTENTS;
566 if (hdr->sh_type == SHT_GROUP)
567 flags |= SEC_GROUP | SEC_EXCLUDE;
568 if ((hdr->sh_flags & SHF_ALLOC) != 0)
571 if (hdr->sh_type != SHT_NOBITS)
574 if ((hdr->sh_flags & SHF_WRITE) == 0)
575 flags |= SEC_READONLY;
576 if ((hdr->sh_flags & SHF_EXECINSTR) != 0)
578 else if ((flags & SEC_LOAD) != 0)
580 if ((hdr->sh_flags & SHF_MERGE) != 0)
583 newsect->entsize = hdr->sh_entsize;
584 if ((hdr->sh_flags & SHF_STRINGS) != 0)
585 flags |= SEC_STRINGS;
587 if (hdr->sh_flags & SHF_GROUP)
588 if (!setup_group (abfd, hdr, newsect))
591 /* The debugging sections appear to be recognized only by name, not
594 static const char *debug_sec_names [] =
603 for (i = ARRAY_SIZE (debug_sec_names); i--;)
604 if (strncmp (name, debug_sec_names[i], strlen (debug_sec_names[i])) == 0)
608 flags |= SEC_DEBUGGING;
611 /* As a GNU extension, if the name begins with .gnu.linkonce, we
612 only link a single copy of the section. This is used to support
613 g++. g++ will emit each template expansion in its own section.
614 The symbols will be defined as weak, so that multiple definitions
615 are permitted. The GNU linker extension is to actually discard
616 all but one of the sections. */
617 if (strncmp (name, ".gnu.linkonce", sizeof ".gnu.linkonce" - 1) == 0)
618 flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
620 bed = get_elf_backend_data (abfd);
621 if (bed->elf_backend_section_flags)
622 if (! bed->elf_backend_section_flags (&flags, hdr))
625 if (! bfd_set_section_flags (abfd, newsect, flags))
628 if ((flags & SEC_ALLOC) != 0)
630 Elf_Internal_Phdr *phdr;
633 /* Look through the phdrs to see if we need to adjust the lma.
634 If all the p_paddr fields are zero, we ignore them, since
635 some ELF linkers produce such output. */
636 phdr = elf_tdata (abfd)->phdr;
637 for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
639 if (phdr->p_paddr != 0)
642 if (i < elf_elfheader (abfd)->e_phnum)
644 phdr = elf_tdata (abfd)->phdr;
645 for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
647 /* This section is part of this segment if its file
648 offset plus size lies within the segment's memory
649 span and, if the section is loaded, the extent of the
650 loaded data lies within the extent of the segment.
651 If the p_paddr field is not set, we don't alter the
653 if (phdr->p_type == PT_LOAD
655 && (bfd_vma) hdr->sh_offset >= phdr->p_offset
656 && (hdr->sh_offset + hdr->sh_size
657 <= phdr->p_offset + phdr->p_memsz)
658 && ((flags & SEC_LOAD) == 0
659 || (phdr->p_offset + phdr->p_filesz
660 >= hdr->sh_offset + hdr->sh_size)))
662 /* We used to do a relative adjustment here, but
663 that doesn't work if the segment is packed with
664 code from multiple VMAs. Instead we calculate
665 the LMA absoultely, based on the LMA of the
666 segment (it is assumed that the segment will
667 contain sections with contiguous LMAs, even if
668 the VMAs are not). */
669 newsect->lma = phdr->p_paddr
670 + hdr->sh_offset - phdr->p_offset;
677 hdr->bfd_section = newsect;
678 elf_section_data (newsect)->this_hdr = *hdr;
688 struct elf_internal_shdr *bfd_elf_find_section (bfd *abfd, char *name);
691 Helper functions for GDB to locate the string tables.
692 Since BFD hides string tables from callers, GDB needs to use an
693 internal hook to find them. Sun's .stabstr, in particular,
694 isn't even pointed to by the .stab section, so ordinary
695 mechanisms wouldn't work to find it, even if we had some.
698 struct elf_internal_shdr *
699 bfd_elf_find_section (abfd, name)
703 Elf_Internal_Shdr **i_shdrp;
708 i_shdrp = elf_elfsections (abfd);
711 shstrtab = bfd_elf_get_str_section
712 (abfd, elf_elfheader (abfd)->e_shstrndx);
713 if (shstrtab != NULL)
715 max = elf_elfheader (abfd)->e_shnum;
716 for (i = 1; i < max; i++)
717 if (!strcmp (&shstrtab[i_shdrp[i]->sh_name], name))
724 const char *const bfd_elf_section_type_names[] = {
725 "SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB",
726 "SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE",
727 "SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM",
730 /* ELF relocs are against symbols. If we are producing relocateable
731 output, and the reloc is against an external symbol, and nothing
732 has given us any additional addend, the resulting reloc will also
733 be against the same symbol. In such a case, we don't want to
734 change anything about the way the reloc is handled, since it will
735 all be done at final link time. Rather than put special case code
736 into bfd_perform_relocation, all the reloc types use this howto
737 function. It just short circuits the reloc if producing
738 relocateable output against an external symbol. */
740 bfd_reloc_status_type
741 bfd_elf_generic_reloc (abfd,
748 bfd *abfd ATTRIBUTE_UNUSED;
749 arelent *reloc_entry;
751 PTR data ATTRIBUTE_UNUSED;
752 asection *input_section;
754 char **error_message ATTRIBUTE_UNUSED;
756 if (output_bfd != (bfd *) NULL
757 && (symbol->flags & BSF_SECTION_SYM) == 0
758 && (! reloc_entry->howto->partial_inplace
759 || reloc_entry->addend == 0))
761 reloc_entry->address += input_section->output_offset;
765 return bfd_reloc_continue;
768 /* Finish SHF_MERGE section merging. */
771 _bfd_elf_merge_sections (abfd, info)
773 struct bfd_link_info *info;
775 if (!is_elf_hash_table (info))
777 if (elf_hash_table (info)->merge_info)
778 _bfd_merge_sections (abfd, elf_hash_table (info)->merge_info);
782 /* Print out the program headers. */
785 _bfd_elf_print_private_bfd_data (abfd, farg)
789 FILE *f = (FILE *) farg;
790 Elf_Internal_Phdr *p;
792 bfd_byte *dynbuf = NULL;
794 p = elf_tdata (abfd)->phdr;
799 fprintf (f, _("\nProgram Header:\n"));
800 c = elf_elfheader (abfd)->e_phnum;
801 for (i = 0; i < c; i++, p++)
808 case PT_NULL: pt = "NULL"; break;
809 case PT_LOAD: pt = "LOAD"; break;
810 case PT_DYNAMIC: pt = "DYNAMIC"; break;
811 case PT_INTERP: pt = "INTERP"; break;
812 case PT_NOTE: pt = "NOTE"; break;
813 case PT_SHLIB: pt = "SHLIB"; break;
814 case PT_PHDR: pt = "PHDR"; break;
815 default: sprintf (buf, "0x%lx", p->p_type); pt = buf; break;
817 fprintf (f, "%8s off 0x", pt);
818 bfd_fprintf_vma (abfd, f, p->p_offset);
819 fprintf (f, " vaddr 0x");
820 bfd_fprintf_vma (abfd, f, p->p_vaddr);
821 fprintf (f, " paddr 0x");
822 bfd_fprintf_vma (abfd, f, p->p_paddr);
823 fprintf (f, " align 2**%u\n", bfd_log2 (p->p_align));
824 fprintf (f, " filesz 0x");
825 bfd_fprintf_vma (abfd, f, p->p_filesz);
826 fprintf (f, " memsz 0x");
827 bfd_fprintf_vma (abfd, f, p->p_memsz);
828 fprintf (f, " flags %c%c%c",
829 (p->p_flags & PF_R) != 0 ? 'r' : '-',
830 (p->p_flags & PF_W) != 0 ? 'w' : '-',
831 (p->p_flags & PF_X) != 0 ? 'x' : '-');
832 if ((p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X)) != 0)
833 fprintf (f, " %lx", p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X));
838 s = bfd_get_section_by_name (abfd, ".dynamic");
842 unsigned long shlink;
843 bfd_byte *extdyn, *extdynend;
845 void (*swap_dyn_in) PARAMS ((bfd *, const PTR, Elf_Internal_Dyn *));
847 fprintf (f, _("\nDynamic Section:\n"));
849 dynbuf = (bfd_byte *) bfd_malloc (s->_raw_size);
852 if (! bfd_get_section_contents (abfd, s, (PTR) dynbuf, (file_ptr) 0,
856 elfsec = _bfd_elf_section_from_bfd_section (abfd, s);
859 shlink = elf_elfsections (abfd)[elfsec]->sh_link;
861 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
862 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
865 extdynend = extdyn + s->_raw_size;
866 for (; extdyn < extdynend; extdyn += extdynsize)
868 Elf_Internal_Dyn dyn;
873 (*swap_dyn_in) (abfd, (PTR) extdyn, &dyn);
875 if (dyn.d_tag == DT_NULL)
882 sprintf (ab, "0x%lx", (unsigned long) dyn.d_tag);
886 case DT_NEEDED: name = "NEEDED"; stringp = true; break;
887 case DT_PLTRELSZ: name = "PLTRELSZ"; break;
888 case DT_PLTGOT: name = "PLTGOT"; break;
889 case DT_HASH: name = "HASH"; break;
890 case DT_STRTAB: name = "STRTAB"; break;
891 case DT_SYMTAB: name = "SYMTAB"; break;
892 case DT_RELA: name = "RELA"; break;
893 case DT_RELASZ: name = "RELASZ"; break;
894 case DT_RELAENT: name = "RELAENT"; break;
895 case DT_STRSZ: name = "STRSZ"; break;
896 case DT_SYMENT: name = "SYMENT"; break;
897 case DT_INIT: name = "INIT"; break;
898 case DT_FINI: name = "FINI"; break;
899 case DT_SONAME: name = "SONAME"; stringp = true; break;
900 case DT_RPATH: name = "RPATH"; stringp = true; break;
901 case DT_SYMBOLIC: name = "SYMBOLIC"; break;
902 case DT_REL: name = "REL"; break;
903 case DT_RELSZ: name = "RELSZ"; break;
904 case DT_RELENT: name = "RELENT"; break;
905 case DT_PLTREL: name = "PLTREL"; break;
906 case DT_DEBUG: name = "DEBUG"; break;
907 case DT_TEXTREL: name = "TEXTREL"; break;
908 case DT_JMPREL: name = "JMPREL"; break;
909 case DT_BIND_NOW: name = "BIND_NOW"; break;
910 case DT_INIT_ARRAY: name = "INIT_ARRAY"; break;
911 case DT_FINI_ARRAY: name = "FINI_ARRAY"; break;
912 case DT_INIT_ARRAYSZ: name = "INIT_ARRAYSZ"; break;
913 case DT_FINI_ARRAYSZ: name = "FINI_ARRAYSZ"; break;
914 case DT_RUNPATH: name = "RUNPATH"; stringp = true; break;
915 case DT_FLAGS: name = "FLAGS"; break;
916 case DT_PREINIT_ARRAY: name = "PREINIT_ARRAY"; break;
917 case DT_PREINIT_ARRAYSZ: name = "PREINIT_ARRAYSZ"; break;
918 case DT_CHECKSUM: name = "CHECKSUM"; break;
919 case DT_PLTPADSZ: name = "PLTPADSZ"; break;
920 case DT_MOVEENT: name = "MOVEENT"; break;
921 case DT_MOVESZ: name = "MOVESZ"; break;
922 case DT_FEATURE: name = "FEATURE"; break;
923 case DT_POSFLAG_1: name = "POSFLAG_1"; break;
924 case DT_SYMINSZ: name = "SYMINSZ"; break;
925 case DT_SYMINENT: name = "SYMINENT"; break;
926 case DT_CONFIG: name = "CONFIG"; stringp = true; break;
927 case DT_DEPAUDIT: name = "DEPAUDIT"; stringp = true; break;
928 case DT_AUDIT: name = "AUDIT"; stringp = true; break;
929 case DT_PLTPAD: name = "PLTPAD"; break;
930 case DT_MOVETAB: name = "MOVETAB"; break;
931 case DT_SYMINFO: name = "SYMINFO"; break;
932 case DT_RELACOUNT: name = "RELACOUNT"; break;
933 case DT_RELCOUNT: name = "RELCOUNT"; break;
934 case DT_FLAGS_1: name = "FLAGS_1"; break;
935 case DT_VERSYM: name = "VERSYM"; break;
936 case DT_VERDEF: name = "VERDEF"; break;
937 case DT_VERDEFNUM: name = "VERDEFNUM"; break;
938 case DT_VERNEED: name = "VERNEED"; break;
939 case DT_VERNEEDNUM: name = "VERNEEDNUM"; break;
940 case DT_AUXILIARY: name = "AUXILIARY"; stringp = true; break;
941 case DT_USED: name = "USED"; break;
942 case DT_FILTER: name = "FILTER"; stringp = true; break;
945 fprintf (f, " %-11s ", name);
947 fprintf (f, "0x%lx", (unsigned long) dyn.d_un.d_val);
951 unsigned int tagv = dyn.d_un.d_val;
953 string = bfd_elf_string_from_elf_section (abfd, shlink, tagv);
956 fprintf (f, "%s", string);
965 if ((elf_dynverdef (abfd) != 0 && elf_tdata (abfd)->verdef == NULL)
966 || (elf_dynverref (abfd) != 0 && elf_tdata (abfd)->verref == NULL))
968 if (! _bfd_elf_slurp_version_tables (abfd))
972 if (elf_dynverdef (abfd) != 0)
974 Elf_Internal_Verdef *t;
976 fprintf (f, _("\nVersion definitions:\n"));
977 for (t = elf_tdata (abfd)->verdef; t != NULL; t = t->vd_nextdef)
979 fprintf (f, "%d 0x%2.2x 0x%8.8lx %s\n", t->vd_ndx,
980 t->vd_flags, t->vd_hash, t->vd_nodename);
981 if (t->vd_auxptr->vda_nextptr != NULL)
983 Elf_Internal_Verdaux *a;
986 for (a = t->vd_auxptr->vda_nextptr;
989 fprintf (f, "%s ", a->vda_nodename);
995 if (elf_dynverref (abfd) != 0)
997 Elf_Internal_Verneed *t;
999 fprintf (f, _("\nVersion References:\n"));
1000 for (t = elf_tdata (abfd)->verref; t != NULL; t = t->vn_nextref)
1002 Elf_Internal_Vernaux *a;
1004 fprintf (f, _(" required from %s:\n"), t->vn_filename);
1005 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
1006 fprintf (f, " 0x%8.8lx 0x%2.2x %2.2d %s\n", a->vna_hash,
1007 a->vna_flags, a->vna_other, a->vna_nodename);
1019 /* Display ELF-specific fields of a symbol. */
1022 bfd_elf_print_symbol (abfd, filep, symbol, how)
1026 bfd_print_symbol_type how;
1028 FILE *file = (FILE *) filep;
1031 case bfd_print_symbol_name:
1032 fprintf (file, "%s", symbol->name);
1034 case bfd_print_symbol_more:
1035 fprintf (file, "elf ");
1036 bfd_fprintf_vma (abfd, file, symbol->value);
1037 fprintf (file, " %lx", (long) symbol->flags);
1039 case bfd_print_symbol_all:
1041 const char *section_name;
1042 const char *name = NULL;
1043 struct elf_backend_data *bed;
1044 unsigned char st_other;
1047 section_name = symbol->section ? symbol->section->name : "(*none*)";
1049 bed = get_elf_backend_data (abfd);
1050 if (bed->elf_backend_print_symbol_all)
1051 name = (*bed->elf_backend_print_symbol_all) (abfd, filep, symbol);
1055 name = symbol->name;
1056 bfd_print_symbol_vandf (abfd, (PTR) file, symbol);
1059 fprintf (file, " %s\t", section_name);
1060 /* Print the "other" value for a symbol. For common symbols,
1061 we've already printed the size; now print the alignment.
1062 For other symbols, we have no specified alignment, and
1063 we've printed the address; now print the size. */
1064 if (bfd_is_com_section (symbol->section))
1065 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_value;
1067 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_size;
1068 bfd_fprintf_vma (abfd, file, val);
1070 /* If we have version information, print it. */
1071 if (elf_tdata (abfd)->dynversym_section != 0
1072 && (elf_tdata (abfd)->dynverdef_section != 0
1073 || elf_tdata (abfd)->dynverref_section != 0))
1075 unsigned int vernum;
1076 const char *version_string;
1078 vernum = ((elf_symbol_type *) symbol)->version & VERSYM_VERSION;
1081 version_string = "";
1082 else if (vernum == 1)
1083 version_string = "Base";
1084 else if (vernum <= elf_tdata (abfd)->cverdefs)
1086 elf_tdata (abfd)->verdef[vernum - 1].vd_nodename;
1089 Elf_Internal_Verneed *t;
1091 version_string = "";
1092 for (t = elf_tdata (abfd)->verref;
1096 Elf_Internal_Vernaux *a;
1098 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
1100 if (a->vna_other == vernum)
1102 version_string = a->vna_nodename;
1109 if ((((elf_symbol_type *) symbol)->version & VERSYM_HIDDEN) == 0)
1110 fprintf (file, " %-11s", version_string);
1115 fprintf (file, " (%s)", version_string);
1116 for (i = 10 - strlen (version_string); i > 0; --i)
1121 /* If the st_other field is not zero, print it. */
1122 st_other = ((elf_symbol_type *) symbol)->internal_elf_sym.st_other;
1127 case STV_INTERNAL: fprintf (file, " .internal"); break;
1128 case STV_HIDDEN: fprintf (file, " .hidden"); break;
1129 case STV_PROTECTED: fprintf (file, " .protected"); break;
1131 /* Some other non-defined flags are also present, so print
1133 fprintf (file, " 0x%02x", (unsigned int) st_other);
1136 fprintf (file, " %s", name);
1142 /* Create an entry in an ELF linker hash table. */
1144 struct bfd_hash_entry *
1145 _bfd_elf_link_hash_newfunc (entry, table, string)
1146 struct bfd_hash_entry *entry;
1147 struct bfd_hash_table *table;
1150 /* Allocate the structure if it has not already been allocated by a
1154 entry = bfd_hash_allocate (table, sizeof (struct elf_link_hash_entry));
1159 /* Call the allocation method of the superclass. */
1160 entry = _bfd_link_hash_newfunc (entry, table, string);
1163 struct elf_link_hash_entry *ret = (struct elf_link_hash_entry *) entry;
1164 struct elf_link_hash_table *htab = (struct elf_link_hash_table *) table;
1166 /* Set local fields. */
1170 ret->dynstr_index = 0;
1171 ret->weakdef = NULL;
1172 ret->got.refcount = htab->init_refcount;
1173 ret->plt.refcount = htab->init_refcount;
1174 ret->linker_section_pointer = NULL;
1175 ret->verinfo.verdef = NULL;
1176 ret->vtable_entries_used = NULL;
1177 ret->vtable_entries_size = 0;
1178 ret->vtable_parent = NULL;
1179 ret->type = STT_NOTYPE;
1181 /* Assume that we have been called by a non-ELF symbol reader.
1182 This flag is then reset by the code which reads an ELF input
1183 file. This ensures that a symbol created by a non-ELF symbol
1184 reader will have the flag set correctly. */
1185 ret->elf_link_hash_flags = ELF_LINK_NON_ELF;
1191 /* Copy data from an indirect symbol to its direct symbol, hiding the
1192 old indirect symbol. Also used for copying flags to a weakdef. */
1195 _bfd_elf_link_hash_copy_indirect (dir, ind)
1196 struct elf_link_hash_entry *dir, *ind;
1200 /* Copy down any references that we may have already seen to the
1201 symbol which just became indirect. */
1203 dir->elf_link_hash_flags |=
1204 (ind->elf_link_hash_flags
1205 & (ELF_LINK_HASH_REF_DYNAMIC
1206 | ELF_LINK_HASH_REF_REGULAR
1207 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
1208 | ELF_LINK_NON_GOT_REF));
1210 if (ind->root.type != bfd_link_hash_indirect)
1213 /* Copy over the global and procedure linkage table refcount entries.
1214 These may have been already set up by a check_relocs routine. */
1215 tmp = dir->got.refcount;
1218 dir->got.refcount = ind->got.refcount;
1219 ind->got.refcount = tmp;
1222 BFD_ASSERT (ind->got.refcount <= 0);
1224 tmp = dir->plt.refcount;
1227 dir->plt.refcount = ind->plt.refcount;
1228 ind->plt.refcount = tmp;
1231 BFD_ASSERT (ind->plt.refcount <= 0);
1233 if (dir->dynindx == -1)
1235 dir->dynindx = ind->dynindx;
1236 dir->dynstr_index = ind->dynstr_index;
1238 ind->dynstr_index = 0;
1241 BFD_ASSERT (ind->dynindx == -1);
1245 _bfd_elf_link_hash_hide_symbol (info, h)
1246 struct bfd_link_info *info ATTRIBUTE_UNUSED;
1247 struct elf_link_hash_entry *h;
1249 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
1250 h->plt.offset = (bfd_vma) -1;
1251 if ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0)
1255 /* Initialize an ELF linker hash table. */
1258 _bfd_elf_link_hash_table_init (table, abfd, newfunc)
1259 struct elf_link_hash_table *table;
1261 struct bfd_hash_entry *(*newfunc) PARAMS ((struct bfd_hash_entry *,
1262 struct bfd_hash_table *,
1267 table->dynamic_sections_created = false;
1268 table->dynobj = NULL;
1269 table->init_refcount = get_elf_backend_data (abfd)->can_refcount - 1;
1270 /* The first dynamic symbol is a dummy. */
1271 table->dynsymcount = 1;
1272 table->dynstr = NULL;
1273 table->bucketcount = 0;
1274 table->needed = NULL;
1275 table->runpath = NULL;
1277 table->stab_info = NULL;
1278 table->merge_info = NULL;
1279 table->dynlocal = NULL;
1280 ret = _bfd_link_hash_table_init (& table->root, abfd, newfunc);
1281 table->root.type = bfd_link_elf_hash_table;
1286 /* Create an ELF linker hash table. */
1288 struct bfd_link_hash_table *
1289 _bfd_elf_link_hash_table_create (abfd)
1292 struct elf_link_hash_table *ret;
1293 bfd_size_type amt = sizeof (struct elf_link_hash_table);
1295 ret = (struct elf_link_hash_table *) bfd_alloc (abfd, amt);
1296 if (ret == (struct elf_link_hash_table *) NULL)
1299 if (! _bfd_elf_link_hash_table_init (ret, abfd, _bfd_elf_link_hash_newfunc))
1301 bfd_release (abfd, ret);
1308 /* This is a hook for the ELF emulation code in the generic linker to
1309 tell the backend linker what file name to use for the DT_NEEDED
1310 entry for a dynamic object. The generic linker passes name as an
1311 empty string to indicate that no DT_NEEDED entry should be made. */
1314 bfd_elf_set_dt_needed_name (abfd, name)
1318 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
1319 && bfd_get_format (abfd) == bfd_object)
1320 elf_dt_name (abfd) = name;
1324 bfd_elf_set_dt_needed_soname (abfd, name)
1328 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
1329 && bfd_get_format (abfd) == bfd_object)
1330 elf_dt_soname (abfd) = name;
1333 /* Get the list of DT_NEEDED entries for a link. This is a hook for
1334 the linker ELF emulation code. */
1336 struct bfd_link_needed_list *
1337 bfd_elf_get_needed_list (abfd, info)
1338 bfd *abfd ATTRIBUTE_UNUSED;
1339 struct bfd_link_info *info;
1341 if (info->hash->creator->flavour != bfd_target_elf_flavour)
1343 return elf_hash_table (info)->needed;
1346 /* Get the list of DT_RPATH/DT_RUNPATH entries for a link. This is a
1347 hook for the linker ELF emulation code. */
1349 struct bfd_link_needed_list *
1350 bfd_elf_get_runpath_list (abfd, info)
1351 bfd *abfd ATTRIBUTE_UNUSED;
1352 struct bfd_link_info *info;
1354 if (info->hash->creator->flavour != bfd_target_elf_flavour)
1356 return elf_hash_table (info)->runpath;
1359 /* Get the name actually used for a dynamic object for a link. This
1360 is the SONAME entry if there is one. Otherwise, it is the string
1361 passed to bfd_elf_set_dt_needed_name, or it is the filename. */
1364 bfd_elf_get_dt_soname (abfd)
1367 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
1368 && bfd_get_format (abfd) == bfd_object)
1369 return elf_dt_name (abfd);
1373 /* Get the list of DT_NEEDED entries from a BFD. This is a hook for
1374 the ELF linker emulation code. */
1377 bfd_elf_get_bfd_needed_list (abfd, pneeded)
1379 struct bfd_link_needed_list **pneeded;
1382 bfd_byte *dynbuf = NULL;
1384 unsigned long shlink;
1385 bfd_byte *extdyn, *extdynend;
1387 void (*swap_dyn_in) PARAMS ((bfd *, const PTR, Elf_Internal_Dyn *));
1391 if (bfd_get_flavour (abfd) != bfd_target_elf_flavour
1392 || bfd_get_format (abfd) != bfd_object)
1395 s = bfd_get_section_by_name (abfd, ".dynamic");
1396 if (s == NULL || s->_raw_size == 0)
1399 dynbuf = (bfd_byte *) bfd_malloc (s->_raw_size);
1403 if (! bfd_get_section_contents (abfd, s, (PTR) dynbuf, (file_ptr) 0,
1407 elfsec = _bfd_elf_section_from_bfd_section (abfd, s);
1411 shlink = elf_elfsections (abfd)[elfsec]->sh_link;
1413 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
1414 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
1417 extdynend = extdyn + s->_raw_size;
1418 for (; extdyn < extdynend; extdyn += extdynsize)
1420 Elf_Internal_Dyn dyn;
1422 (*swap_dyn_in) (abfd, (PTR) extdyn, &dyn);
1424 if (dyn.d_tag == DT_NULL)
1427 if (dyn.d_tag == DT_NEEDED)
1430 struct bfd_link_needed_list *l;
1431 unsigned int tagv = dyn.d_un.d_val;
1434 string = bfd_elf_string_from_elf_section (abfd, shlink, tagv);
1439 l = (struct bfd_link_needed_list *) bfd_alloc (abfd, amt);
1460 /* Allocate an ELF string table--force the first byte to be zero. */
1462 struct bfd_strtab_hash *
1463 _bfd_elf_stringtab_init ()
1465 struct bfd_strtab_hash *ret;
1467 ret = _bfd_stringtab_init ();
1472 loc = _bfd_stringtab_add (ret, "", true, false);
1473 BFD_ASSERT (loc == 0 || loc == (bfd_size_type) -1);
1474 if (loc == (bfd_size_type) -1)
1476 _bfd_stringtab_free (ret);
1483 /* ELF .o/exec file reading */
1485 /* Create a new bfd section from an ELF section header. */
1488 bfd_section_from_shdr (abfd, shindex)
1490 unsigned int shindex;
1492 Elf_Internal_Shdr *hdr = elf_elfsections (abfd)[shindex];
1493 Elf_Internal_Ehdr *ehdr = elf_elfheader (abfd);
1494 struct elf_backend_data *bed = get_elf_backend_data (abfd);
1497 name = elf_string_from_elf_strtab (abfd, hdr->sh_name);
1499 switch (hdr->sh_type)
1502 /* Inactive section. Throw it away. */
1505 case SHT_PROGBITS: /* Normal section with contents. */
1506 case SHT_DYNAMIC: /* Dynamic linking information. */
1507 case SHT_NOBITS: /* .bss section. */
1508 case SHT_HASH: /* .hash section. */
1509 case SHT_NOTE: /* .note section. */
1510 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1512 case SHT_SYMTAB: /* A symbol table */
1513 if (elf_onesymtab (abfd) == shindex)
1516 BFD_ASSERT (hdr->sh_entsize == bed->s->sizeof_sym);
1517 BFD_ASSERT (elf_onesymtab (abfd) == 0);
1518 elf_onesymtab (abfd) = shindex;
1519 elf_tdata (abfd)->symtab_hdr = *hdr;
1520 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->symtab_hdr;
1521 abfd->flags |= HAS_SYMS;
1523 /* Sometimes a shared object will map in the symbol table. If
1524 SHF_ALLOC is set, and this is a shared object, then we also
1525 treat this section as a BFD section. We can not base the
1526 decision purely on SHF_ALLOC, because that flag is sometimes
1527 set in a relocateable object file, which would confuse the
1529 if ((hdr->sh_flags & SHF_ALLOC) != 0
1530 && (abfd->flags & DYNAMIC) != 0
1531 && ! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
1536 case SHT_DYNSYM: /* A dynamic symbol table */
1537 if (elf_dynsymtab (abfd) == shindex)
1540 BFD_ASSERT (hdr->sh_entsize == bed->s->sizeof_sym);
1541 BFD_ASSERT (elf_dynsymtab (abfd) == 0);
1542 elf_dynsymtab (abfd) = shindex;
1543 elf_tdata (abfd)->dynsymtab_hdr = *hdr;
1544 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->dynsymtab_hdr;
1545 abfd->flags |= HAS_SYMS;
1547 /* Besides being a symbol table, we also treat this as a regular
1548 section, so that objcopy can handle it. */
1549 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1551 case SHT_STRTAB: /* A string table */
1552 if (hdr->bfd_section != NULL)
1554 if (ehdr->e_shstrndx == shindex)
1556 elf_tdata (abfd)->shstrtab_hdr = *hdr;
1557 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->shstrtab_hdr;
1563 for (i = 1; i < ehdr->e_shnum; i++)
1565 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1566 if (hdr2->sh_link == shindex)
1568 if (! bfd_section_from_shdr (abfd, i))
1570 if (elf_onesymtab (abfd) == i)
1572 elf_tdata (abfd)->strtab_hdr = *hdr;
1573 elf_elfsections (abfd)[shindex] =
1574 &elf_tdata (abfd)->strtab_hdr;
1577 if (elf_dynsymtab (abfd) == i)
1579 elf_tdata (abfd)->dynstrtab_hdr = *hdr;
1580 elf_elfsections (abfd)[shindex] = hdr =
1581 &elf_tdata (abfd)->dynstrtab_hdr;
1582 /* We also treat this as a regular section, so
1583 that objcopy can handle it. */
1586 #if 0 /* Not handling other string tables specially right now. */
1587 hdr2 = elf_elfsections (abfd)[i]; /* in case it moved */
1588 /* We have a strtab for some random other section. */
1589 newsect = (asection *) hdr2->bfd_section;
1592 hdr->bfd_section = newsect;
1593 hdr2 = &elf_section_data (newsect)->str_hdr;
1595 elf_elfsections (abfd)[shindex] = hdr2;
1601 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1605 /* *These* do a lot of work -- but build no sections! */
1607 asection *target_sect;
1608 Elf_Internal_Shdr *hdr2;
1610 /* Check for a bogus link to avoid crashing. */
1611 if (hdr->sh_link >= ehdr->e_shnum)
1613 ((*_bfd_error_handler)
1614 (_("%s: invalid link %lu for reloc section %s (index %u)"),
1615 bfd_archive_filename (abfd), hdr->sh_link, name, shindex));
1616 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1619 /* For some incomprehensible reason Oracle distributes
1620 libraries for Solaris in which some of the objects have
1621 bogus sh_link fields. It would be nice if we could just
1622 reject them, but, unfortunately, some people need to use
1623 them. We scan through the section headers; if we find only
1624 one suitable symbol table, we clobber the sh_link to point
1625 to it. I hope this doesn't break anything. */
1626 if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_SYMTAB
1627 && elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_DYNSYM)
1633 for (scan = 1; scan < ehdr->e_shnum; scan++)
1635 if (elf_elfsections (abfd)[scan]->sh_type == SHT_SYMTAB
1636 || elf_elfsections (abfd)[scan]->sh_type == SHT_DYNSYM)
1647 hdr->sh_link = found;
1650 /* Get the symbol table. */
1651 if (elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_SYMTAB
1652 && ! bfd_section_from_shdr (abfd, hdr->sh_link))
1655 /* If this reloc section does not use the main symbol table we
1656 don't treat it as a reloc section. BFD can't adequately
1657 represent such a section, so at least for now, we don't
1658 try. We just present it as a normal section. We also
1659 can't use it as a reloc section if it points to the null
1661 if (hdr->sh_link != elf_onesymtab (abfd) || hdr->sh_info == SHN_UNDEF)
1662 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1664 if (! bfd_section_from_shdr (abfd, hdr->sh_info))
1666 target_sect = bfd_section_from_elf_index (abfd, hdr->sh_info);
1667 if (target_sect == NULL)
1670 if ((target_sect->flags & SEC_RELOC) == 0
1671 || target_sect->reloc_count == 0)
1672 hdr2 = &elf_section_data (target_sect)->rel_hdr;
1676 BFD_ASSERT (elf_section_data (target_sect)->rel_hdr2 == NULL);
1677 amt = sizeof (*hdr2);
1678 hdr2 = (Elf_Internal_Shdr *) bfd_alloc (abfd, amt);
1679 elf_section_data (target_sect)->rel_hdr2 = hdr2;
1682 elf_elfsections (abfd)[shindex] = hdr2;
1683 target_sect->reloc_count += NUM_SHDR_ENTRIES (hdr);
1684 target_sect->flags |= SEC_RELOC;
1685 target_sect->relocation = NULL;
1686 target_sect->rel_filepos = hdr->sh_offset;
1687 /* In the section to which the relocations apply, mark whether
1688 its relocations are of the REL or RELA variety. */
1689 if (hdr->sh_size != 0)
1690 elf_section_data (target_sect)->use_rela_p
1691 = (hdr->sh_type == SHT_RELA);
1692 abfd->flags |= HAS_RELOC;
1697 case SHT_GNU_verdef:
1698 elf_dynverdef (abfd) = shindex;
1699 elf_tdata (abfd)->dynverdef_hdr = *hdr;
1700 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1703 case SHT_GNU_versym:
1704 elf_dynversym (abfd) = shindex;
1705 elf_tdata (abfd)->dynversym_hdr = *hdr;
1706 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1709 case SHT_GNU_verneed:
1710 elf_dynverref (abfd) = shindex;
1711 elf_tdata (abfd)->dynverref_hdr = *hdr;
1712 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1719 /* Make a section for objcopy and relocatable links. */
1720 if (!_bfd_elf_make_section_from_shdr (abfd, hdr, name))
1722 if (hdr->contents != NULL)
1724 Elf_Internal_Group *idx = (Elf_Internal_Group *) hdr->contents;
1725 unsigned int n_elt = hdr->sh_size / 4;
1728 while (--n_elt != 0)
1729 if ((s = (++idx)->shdr->bfd_section) != NULL
1730 && elf_next_in_group (s) != NULL)
1732 elf_next_in_group (hdr->bfd_section) = s;
1739 /* Check for any processor-specific section types. */
1741 if (bed->elf_backend_section_from_shdr)
1742 (*bed->elf_backend_section_from_shdr) (abfd, hdr, name);
1750 /* Return the section for the local symbol specified by ABFD, R_SYMNDX.
1751 Return SEC for sections that have no elf section, and NULL on error. */
1754 bfd_section_from_r_symndx (abfd, cache, sec, r_symndx)
1756 struct sym_sec_cache *cache;
1758 unsigned long r_symndx;
1760 unsigned char esym_shndx[2];
1761 unsigned int isym_shndx;
1762 Elf_Internal_Shdr *symtab_hdr;
1765 unsigned int ent = r_symndx % LOCAL_SYM_CACHE_SIZE;
1767 if (cache->abfd == abfd && cache->indx[ent] == r_symndx)
1768 return cache->sec[ent];
1770 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1771 pos = symtab_hdr->sh_offset;
1772 if (get_elf_backend_data (abfd)->s->sizeof_sym
1773 == sizeof (Elf64_External_Sym))
1775 pos += r_symndx * sizeof (Elf64_External_Sym);
1776 pos += offsetof (Elf64_External_Sym, st_shndx);
1780 pos += r_symndx * sizeof (Elf32_External_Sym);
1781 pos += offsetof (Elf32_External_Sym, st_shndx);
1783 amt = sizeof (esym_shndx);
1784 if (bfd_seek (abfd, pos, SEEK_SET) != 0
1785 || bfd_bread ((PTR) esym_shndx, amt, abfd) != amt)
1787 isym_shndx = H_GET_16 (abfd, esym_shndx);
1789 if (cache->abfd != abfd)
1791 memset (cache->indx, -1, sizeof (cache->indx));
1794 cache->indx[ent] = r_symndx;
1795 cache->sec[ent] = sec;
1796 if (isym_shndx > 0 && isym_shndx < SHN_LORESERVE)
1799 s = bfd_section_from_elf_index (abfd, isym_shndx);
1801 cache->sec[ent] = s;
1803 return cache->sec[ent];
1806 /* Given an ELF section number, retrieve the corresponding BFD
1810 bfd_section_from_elf_index (abfd, index)
1814 BFD_ASSERT (index > 0 && index < SHN_LORESERVE);
1815 if (index >= elf_elfheader (abfd)->e_shnum)
1817 return elf_elfsections (abfd)[index]->bfd_section;
1821 _bfd_elf_new_section_hook (abfd, sec)
1825 struct bfd_elf_section_data *sdata;
1826 bfd_size_type amt = sizeof (*sdata);
1828 sdata = (struct bfd_elf_section_data *) bfd_zalloc (abfd, amt);
1831 sec->used_by_bfd = (PTR) sdata;
1833 /* Indicate whether or not this section should use RELA relocations. */
1835 = get_elf_backend_data (abfd)->default_use_rela_p;
1840 /* Create a new bfd section from an ELF program header.
1842 Since program segments have no names, we generate a synthetic name
1843 of the form segment<NUM>, where NUM is generally the index in the
1844 program header table. For segments that are split (see below) we
1845 generate the names segment<NUM>a and segment<NUM>b.
1847 Note that some program segments may have a file size that is different than
1848 (less than) the memory size. All this means is that at execution the
1849 system must allocate the amount of memory specified by the memory size,
1850 but only initialize it with the first "file size" bytes read from the
1851 file. This would occur for example, with program segments consisting
1852 of combined data+bss.
1854 To handle the above situation, this routine generates TWO bfd sections
1855 for the single program segment. The first has the length specified by
1856 the file size of the segment, and the second has the length specified
1857 by the difference between the two sizes. In effect, the segment is split
1858 into it's initialized and uninitialized parts.
1863 _bfd_elf_make_section_from_phdr (abfd, hdr, index, typename)
1865 Elf_Internal_Phdr *hdr;
1867 const char *typename;
1874 split = ((hdr->p_memsz > 0)
1875 && (hdr->p_filesz > 0)
1876 && (hdr->p_memsz > hdr->p_filesz));
1877 sprintf (namebuf, "%s%d%s", typename, index, split ? "a" : "");
1878 name = bfd_alloc (abfd, (bfd_size_type) strlen (namebuf) + 1);
1881 strcpy (name, namebuf);
1882 newsect = bfd_make_section (abfd, name);
1883 if (newsect == NULL)
1885 newsect->vma = hdr->p_vaddr;
1886 newsect->lma = hdr->p_paddr;
1887 newsect->_raw_size = hdr->p_filesz;
1888 newsect->filepos = hdr->p_offset;
1889 newsect->flags |= SEC_HAS_CONTENTS;
1890 if (hdr->p_type == PT_LOAD)
1892 newsect->flags |= SEC_ALLOC;
1893 newsect->flags |= SEC_LOAD;
1894 if (hdr->p_flags & PF_X)
1896 /* FIXME: all we known is that it has execute PERMISSION,
1898 newsect->flags |= SEC_CODE;
1901 if (!(hdr->p_flags & PF_W))
1903 newsect->flags |= SEC_READONLY;
1908 sprintf (namebuf, "%s%db", typename, index);
1909 name = bfd_alloc (abfd, (bfd_size_type) strlen (namebuf) + 1);
1912 strcpy (name, namebuf);
1913 newsect = bfd_make_section (abfd, name);
1914 if (newsect == NULL)
1916 newsect->vma = hdr->p_vaddr + hdr->p_filesz;
1917 newsect->lma = hdr->p_paddr + hdr->p_filesz;
1918 newsect->_raw_size = hdr->p_memsz - hdr->p_filesz;
1919 if (hdr->p_type == PT_LOAD)
1921 newsect->flags |= SEC_ALLOC;
1922 if (hdr->p_flags & PF_X)
1923 newsect->flags |= SEC_CODE;
1925 if (!(hdr->p_flags & PF_W))
1926 newsect->flags |= SEC_READONLY;
1933 bfd_section_from_phdr (abfd, hdr, index)
1935 Elf_Internal_Phdr *hdr;
1938 struct elf_backend_data *bed;
1940 switch (hdr->p_type)
1943 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "null");
1946 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "load");
1949 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "dynamic");
1952 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "interp");
1955 if (! _bfd_elf_make_section_from_phdr (abfd, hdr, index, "note"))
1957 if (! elfcore_read_notes (abfd, (file_ptr) hdr->p_offset, hdr->p_filesz))
1962 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "shlib");
1965 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "phdr");
1968 /* Check for any processor-specific program segment types.
1969 If no handler for them, default to making "segment" sections. */
1970 bed = get_elf_backend_data (abfd);
1971 if (bed->elf_backend_section_from_phdr)
1972 return (*bed->elf_backend_section_from_phdr) (abfd, hdr, index);
1974 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "segment");
1978 /* Initialize REL_HDR, the section-header for new section, containing
1979 relocations against ASECT. If USE_RELA_P is true, we use RELA
1980 relocations; otherwise, we use REL relocations. */
1983 _bfd_elf_init_reloc_shdr (abfd, rel_hdr, asect, use_rela_p)
1985 Elf_Internal_Shdr *rel_hdr;
1990 struct elf_backend_data *bed = get_elf_backend_data (abfd);
1991 bfd_size_type amt = sizeof ".rela" + strlen (asect->name);
1993 name = bfd_alloc (abfd, amt);
1996 sprintf (name, "%s%s", use_rela_p ? ".rela" : ".rel", asect->name);
1998 (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd), name,
2000 if (rel_hdr->sh_name == (unsigned int) -1)
2002 rel_hdr->sh_type = use_rela_p ? SHT_RELA : SHT_REL;
2003 rel_hdr->sh_entsize = (use_rela_p
2004 ? bed->s->sizeof_rela
2005 : bed->s->sizeof_rel);
2006 rel_hdr->sh_addralign = bed->s->file_align;
2007 rel_hdr->sh_flags = 0;
2008 rel_hdr->sh_addr = 0;
2009 rel_hdr->sh_size = 0;
2010 rel_hdr->sh_offset = 0;
2015 /* Set up an ELF internal section header for a section. */
2018 elf_fake_sections (abfd, asect, failedptrarg)
2023 struct elf_backend_data *bed = get_elf_backend_data (abfd);
2024 boolean *failedptr = (boolean *) failedptrarg;
2025 Elf_Internal_Shdr *this_hdr;
2029 /* We already failed; just get out of the bfd_map_over_sections
2034 this_hdr = &elf_section_data (asect)->this_hdr;
2036 this_hdr->sh_name = (unsigned long) _bfd_elf_strtab_add (elf_shstrtab (abfd),
2037 asect->name, false);
2038 if (this_hdr->sh_name == (unsigned long) -1)
2044 this_hdr->sh_flags = 0;
2046 if ((asect->flags & SEC_ALLOC) != 0
2047 || asect->user_set_vma)
2048 this_hdr->sh_addr = asect->vma;
2050 this_hdr->sh_addr = 0;
2052 this_hdr->sh_offset = 0;
2053 this_hdr->sh_size = asect->_raw_size;
2054 this_hdr->sh_link = 0;
2055 this_hdr->sh_addralign = 1 << asect->alignment_power;
2056 /* The sh_entsize and sh_info fields may have been set already by
2057 copy_private_section_data. */
2059 this_hdr->bfd_section = asect;
2060 this_hdr->contents = NULL;
2062 /* FIXME: This should not be based on section names. */
2063 if (strcmp (asect->name, ".dynstr") == 0)
2064 this_hdr->sh_type = SHT_STRTAB;
2065 else if (strcmp (asect->name, ".hash") == 0)
2067 this_hdr->sh_type = SHT_HASH;
2068 this_hdr->sh_entsize = bed->s->sizeof_hash_entry;
2070 else if (strcmp (asect->name, ".dynsym") == 0)
2072 this_hdr->sh_type = SHT_DYNSYM;
2073 this_hdr->sh_entsize = bed->s->sizeof_sym;
2075 else if (strcmp (asect->name, ".dynamic") == 0)
2077 this_hdr->sh_type = SHT_DYNAMIC;
2078 this_hdr->sh_entsize = bed->s->sizeof_dyn;
2080 else if (strncmp (asect->name, ".rela", 5) == 0
2081 && get_elf_backend_data (abfd)->may_use_rela_p)
2083 this_hdr->sh_type = SHT_RELA;
2084 this_hdr->sh_entsize = bed->s->sizeof_rela;
2086 else if (strncmp (asect->name, ".rel", 4) == 0
2087 && get_elf_backend_data (abfd)->may_use_rel_p)
2089 this_hdr->sh_type = SHT_REL;
2090 this_hdr->sh_entsize = bed->s->sizeof_rel;
2092 else if (strncmp (asect->name, ".note", 5) == 0)
2093 this_hdr->sh_type = SHT_NOTE;
2094 else if (strncmp (asect->name, ".stab", 5) == 0
2095 && strcmp (asect->name + strlen (asect->name) - 3, "str") == 0)
2096 this_hdr->sh_type = SHT_STRTAB;
2097 else if (strcmp (asect->name, ".gnu.version") == 0)
2099 this_hdr->sh_type = SHT_GNU_versym;
2100 this_hdr->sh_entsize = sizeof (Elf_External_Versym);
2102 else if (strcmp (asect->name, ".gnu.version_d") == 0)
2104 this_hdr->sh_type = SHT_GNU_verdef;
2105 this_hdr->sh_entsize = 0;
2106 /* objcopy or strip will copy over sh_info, but may not set
2107 cverdefs. The linker will set cverdefs, but sh_info will be
2109 if (this_hdr->sh_info == 0)
2110 this_hdr->sh_info = elf_tdata (abfd)->cverdefs;
2112 BFD_ASSERT (elf_tdata (abfd)->cverdefs == 0
2113 || this_hdr->sh_info == elf_tdata (abfd)->cverdefs);
2115 else if (strcmp (asect->name, ".gnu.version_r") == 0)
2117 this_hdr->sh_type = SHT_GNU_verneed;
2118 this_hdr->sh_entsize = 0;
2119 /* objcopy or strip will copy over sh_info, but may not set
2120 cverrefs. The linker will set cverrefs, but sh_info will be
2122 if (this_hdr->sh_info == 0)
2123 this_hdr->sh_info = elf_tdata (abfd)->cverrefs;
2125 BFD_ASSERT (elf_tdata (abfd)->cverrefs == 0
2126 || this_hdr->sh_info == elf_tdata (abfd)->cverrefs);
2128 else if ((asect->flags & SEC_GROUP) != 0)
2130 this_hdr->sh_type = SHT_GROUP;
2131 this_hdr->sh_entsize = 4;
2133 else if ((asect->flags & SEC_ALLOC) != 0
2134 && ((asect->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0))
2135 this_hdr->sh_type = SHT_NOBITS;
2137 this_hdr->sh_type = SHT_PROGBITS;
2139 if ((asect->flags & SEC_ALLOC) != 0)
2140 this_hdr->sh_flags |= SHF_ALLOC;
2141 if ((asect->flags & SEC_READONLY) == 0)
2142 this_hdr->sh_flags |= SHF_WRITE;
2143 if ((asect->flags & SEC_CODE) != 0)
2144 this_hdr->sh_flags |= SHF_EXECINSTR;
2145 if ((asect->flags & SEC_MERGE) != 0)
2147 this_hdr->sh_flags |= SHF_MERGE;
2148 this_hdr->sh_entsize = asect->entsize;
2149 if ((asect->flags & SEC_STRINGS) != 0)
2150 this_hdr->sh_flags |= SHF_STRINGS;
2152 if (elf_group_name (asect) != NULL)
2153 this_hdr->sh_flags |= SHF_GROUP;
2155 /* Check for processor-specific section types. */
2156 if (bed->elf_backend_fake_sections)
2157 (*bed->elf_backend_fake_sections) (abfd, this_hdr, asect);
2159 /* If the section has relocs, set up a section header for the
2160 SHT_REL[A] section. If two relocation sections are required for
2161 this section, it is up to the processor-specific back-end to
2162 create the other. */
2163 if ((asect->flags & SEC_RELOC) != 0
2164 && !_bfd_elf_init_reloc_shdr (abfd,
2165 &elf_section_data (asect)->rel_hdr,
2167 elf_section_data (asect)->use_rela_p))
2171 /* Fill in the contents of a SHT_GROUP section. */
2174 set_group_contents (abfd, sec, failedptrarg)
2177 PTR failedptrarg ATTRIBUTE_UNUSED;
2179 boolean *failedptr = (boolean *) failedptrarg;
2180 unsigned long symindx;
2183 struct bfd_link_order *l;
2185 if (elf_section_data (sec)->this_hdr.sh_type != SHT_GROUP
2189 /* If called from the assembler, swap_out_syms will have set up
2190 elf_section_syms; If called for "ld -r", the symbols won't yet
2191 be mapped, so emulate elf_bfd_final_link. */
2192 if (elf_section_syms (abfd) != NULL)
2193 symindx = elf_section_syms (abfd)[sec->index]->udata.i;
2195 symindx = elf_section_data (sec)->this_idx;
2196 elf_section_data (sec)->this_hdr.sh_info = symindx;
2198 /* Nor will the contents be allocated for "ld -r". */
2199 if (sec->contents == NULL)
2201 sec->contents = bfd_alloc (abfd, sec->_raw_size);
2202 if (sec->contents == NULL)
2209 loc = sec->contents + sec->_raw_size;
2211 /* Get the pointer to the first section in the group that we
2212 squirreled away here. */
2213 elt = elf_next_in_group (sec);
2215 /* First element is a flag word. Rest of section is elf section
2216 indices for all the sections of the group. Write them backwards
2217 just to keep the group in the same order as given in .section
2218 directives, not that it matters. */
2222 H_PUT_32 (abfd, elf_section_data (elt)->this_idx, loc);
2223 elt = elf_next_in_group (elt);
2226 /* If this is a relocatable link, then the above did nothing because
2227 SEC is the output section. Look through the input sections
2229 for (l = sec->link_order_head; l != NULL; l = l->next)
2230 if (l->type == bfd_indirect_link_order
2231 && (elt = elf_next_in_group (l->u.indirect.section)) != NULL)
2236 elf_section_data (elt->output_section)->this_idx, loc);
2237 elt = elf_next_in_group (elt);
2238 /* During a relocatable link, the lists are circular. */
2240 while (elt != elf_next_in_group (l->u.indirect.section));
2243 H_PUT_32 (abfd, 0, loc);
2245 BFD_ASSERT (loc == sec->contents);
2248 /* Assign all ELF section numbers. The dummy first section is handled here
2249 too. The link/info pointers for the standard section types are filled
2250 in here too, while we're at it. */
2253 assign_section_numbers (abfd)
2256 struct elf_obj_tdata *t = elf_tdata (abfd);
2258 unsigned int section_number, secn;
2259 Elf_Internal_Shdr **i_shdrp;
2264 _bfd_elf_strtab_clear_all_refs (elf_shstrtab (abfd));
2266 for (sec = abfd->sections; sec; sec = sec->next)
2268 struct bfd_elf_section_data *d = elf_section_data (sec);
2270 d->this_idx = section_number++;
2271 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->this_hdr.sh_name);
2272 if ((sec->flags & SEC_RELOC) == 0)
2276 d->rel_idx = section_number++;
2277 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rel_hdr.sh_name);
2282 d->rel_idx2 = section_number++;
2283 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rel_hdr2->sh_name);
2289 t->shstrtab_section = section_number++;
2290 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->shstrtab_hdr.sh_name);
2291 elf_elfheader (abfd)->e_shstrndx = t->shstrtab_section;
2293 if (bfd_get_symcount (abfd) > 0)
2295 t->symtab_section = section_number++;
2296 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->symtab_hdr.sh_name);
2297 t->strtab_section = section_number++;
2298 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->strtab_hdr.sh_name);
2301 _bfd_elf_strtab_finalize (elf_shstrtab (abfd));
2302 t->shstrtab_hdr.sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
2303 elf_elfheader (abfd)->e_shnum = section_number;
2305 /* Set up the list of section header pointers, in agreement with the
2307 amt = section_number * sizeof (Elf_Internal_Shdr *);
2308 i_shdrp = (Elf_Internal_Shdr **) bfd_alloc (abfd, amt);
2309 if (i_shdrp == NULL)
2312 amt = sizeof (Elf_Internal_Shdr);
2313 i_shdrp[0] = (Elf_Internal_Shdr *) bfd_alloc (abfd, amt);
2314 if (i_shdrp[0] == NULL)
2316 bfd_release (abfd, i_shdrp);
2319 memset (i_shdrp[0], 0, sizeof (Elf_Internal_Shdr));
2321 elf_elfsections (abfd) = i_shdrp;
2323 i_shdrp[t->shstrtab_section] = &t->shstrtab_hdr;
2324 if (bfd_get_symcount (abfd) > 0)
2326 i_shdrp[t->symtab_section] = &t->symtab_hdr;
2327 i_shdrp[t->strtab_section] = &t->strtab_hdr;
2328 t->symtab_hdr.sh_link = t->strtab_section;
2330 for (sec = abfd->sections; sec; sec = sec->next)
2332 struct bfd_elf_section_data *d = elf_section_data (sec);
2336 i_shdrp[d->this_idx] = &d->this_hdr;
2337 if (d->rel_idx != 0)
2338 i_shdrp[d->rel_idx] = &d->rel_hdr;
2339 if (d->rel_idx2 != 0)
2340 i_shdrp[d->rel_idx2] = d->rel_hdr2;
2342 /* Fill in the sh_link and sh_info fields while we're at it. */
2344 /* sh_link of a reloc section is the section index of the symbol
2345 table. sh_info is the section index of the section to which
2346 the relocation entries apply. */
2347 if (d->rel_idx != 0)
2349 d->rel_hdr.sh_link = t->symtab_section;
2350 d->rel_hdr.sh_info = d->this_idx;
2352 if (d->rel_idx2 != 0)
2354 d->rel_hdr2->sh_link = t->symtab_section;
2355 d->rel_hdr2->sh_info = d->this_idx;
2358 switch (d->this_hdr.sh_type)
2362 /* A reloc section which we are treating as a normal BFD
2363 section. sh_link is the section index of the symbol
2364 table. sh_info is the section index of the section to
2365 which the relocation entries apply. We assume that an
2366 allocated reloc section uses the dynamic symbol table.
2367 FIXME: How can we be sure? */
2368 s = bfd_get_section_by_name (abfd, ".dynsym");
2370 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
2372 /* We look up the section the relocs apply to by name. */
2374 if (d->this_hdr.sh_type == SHT_REL)
2378 s = bfd_get_section_by_name (abfd, name);
2380 d->this_hdr.sh_info = elf_section_data (s)->this_idx;
2384 /* We assume that a section named .stab*str is a stabs
2385 string section. We look for a section with the same name
2386 but without the trailing ``str'', and set its sh_link
2387 field to point to this section. */
2388 if (strncmp (sec->name, ".stab", sizeof ".stab" - 1) == 0
2389 && strcmp (sec->name + strlen (sec->name) - 3, "str") == 0)
2394 len = strlen (sec->name);
2395 alc = (char *) bfd_malloc ((bfd_size_type) len - 2);
2398 strncpy (alc, sec->name, len - 3);
2399 alc[len - 3] = '\0';
2400 s = bfd_get_section_by_name (abfd, alc);
2404 elf_section_data (s)->this_hdr.sh_link = d->this_idx;
2406 /* This is a .stab section. */
2407 elf_section_data (s)->this_hdr.sh_entsize =
2408 4 + 2 * bfd_get_arch_size (abfd) / 8;
2415 case SHT_GNU_verneed:
2416 case SHT_GNU_verdef:
2417 /* sh_link is the section header index of the string table
2418 used for the dynamic entries, or the symbol table, or the
2420 s = bfd_get_section_by_name (abfd, ".dynstr");
2422 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
2426 case SHT_GNU_versym:
2427 /* sh_link is the section header index of the symbol table
2428 this hash table or version table is for. */
2429 s = bfd_get_section_by_name (abfd, ".dynsym");
2431 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
2435 d->this_hdr.sh_link = t->symtab_section;
2439 for (secn = 1; secn < section_number; ++secn)
2440 i_shdrp[secn]->sh_name = _bfd_elf_strtab_offset (elf_shstrtab (abfd),
2441 i_shdrp[secn]->sh_name);
2446 /* Map symbol from it's internal number to the external number, moving
2447 all local symbols to be at the head of the list. */
2450 sym_is_global (abfd, sym)
2454 /* If the backend has a special mapping, use it. */
2455 if (get_elf_backend_data (abfd)->elf_backend_sym_is_global)
2456 return ((*get_elf_backend_data (abfd)->elf_backend_sym_is_global)
2459 return ((sym->flags & (BSF_GLOBAL | BSF_WEAK)) != 0
2460 || bfd_is_und_section (bfd_get_section (sym))
2461 || bfd_is_com_section (bfd_get_section (sym)));
2465 elf_map_symbols (abfd)
2468 unsigned int symcount = bfd_get_symcount (abfd);
2469 asymbol **syms = bfd_get_outsymbols (abfd);
2470 asymbol **sect_syms;
2471 unsigned int num_locals = 0;
2472 unsigned int num_globals = 0;
2473 unsigned int num_locals2 = 0;
2474 unsigned int num_globals2 = 0;
2482 fprintf (stderr, "elf_map_symbols\n");
2486 for (asect = abfd->sections; asect; asect = asect->next)
2488 if (max_index < asect->index)
2489 max_index = asect->index;
2493 amt = max_index * sizeof (asymbol *);
2494 sect_syms = (asymbol **) bfd_zalloc (abfd, amt);
2495 if (sect_syms == NULL)
2497 elf_section_syms (abfd) = sect_syms;
2498 elf_num_section_syms (abfd) = max_index;
2500 /* Init sect_syms entries for any section symbols we have already
2501 decided to output. */
2502 for (idx = 0; idx < symcount; idx++)
2504 asymbol *sym = syms[idx];
2506 if ((sym->flags & BSF_SECTION_SYM) != 0
2513 if (sec->owner != NULL)
2515 if (sec->owner != abfd)
2517 if (sec->output_offset != 0)
2520 sec = sec->output_section;
2522 /* Empty sections in the input files may have had a
2523 section symbol created for them. (See the comment
2524 near the end of _bfd_generic_link_output_symbols in
2525 linker.c). If the linker script discards such
2526 sections then we will reach this point. Since we know
2527 that we cannot avoid this case, we detect it and skip
2528 the abort and the assignment to the sect_syms array.
2529 To reproduce this particular case try running the
2530 linker testsuite test ld-scripts/weak.exp for an ELF
2531 port that uses the generic linker. */
2532 if (sec->owner == NULL)
2535 BFD_ASSERT (sec->owner == abfd);
2537 sect_syms[sec->index] = syms[idx];
2542 /* Classify all of the symbols. */
2543 for (idx = 0; idx < symcount; idx++)
2545 if (!sym_is_global (abfd, syms[idx]))
2551 /* We will be adding a section symbol for each BFD section. Most normal
2552 sections will already have a section symbol in outsymbols, but
2553 eg. SHT_GROUP sections will not, and we need the section symbol mapped
2554 at least in that case. */
2555 for (asect = abfd->sections; asect; asect = asect->next)
2557 if (sect_syms[asect->index] == NULL)
2559 if (!sym_is_global (abfd, asect->symbol))
2566 /* Now sort the symbols so the local symbols are first. */
2567 amt = (num_locals + num_globals) * sizeof (asymbol *);
2568 new_syms = (asymbol **) bfd_alloc (abfd, amt);
2570 if (new_syms == NULL)
2573 for (idx = 0; idx < symcount; idx++)
2575 asymbol *sym = syms[idx];
2578 if (!sym_is_global (abfd, sym))
2581 i = num_locals + num_globals2++;
2583 sym->udata.i = i + 1;
2585 for (asect = abfd->sections; asect; asect = asect->next)
2587 if (sect_syms[asect->index] == NULL)
2589 asymbol *sym = asect->symbol;
2592 sect_syms[asect->index] = sym;
2593 if (!sym_is_global (abfd, sym))
2596 i = num_locals + num_globals2++;
2598 sym->udata.i = i + 1;
2602 bfd_set_symtab (abfd, new_syms, num_locals + num_globals);
2604 elf_num_locals (abfd) = num_locals;
2605 elf_num_globals (abfd) = num_globals;
2609 /* Align to the maximum file alignment that could be required for any
2610 ELF data structure. */
2612 static INLINE file_ptr align_file_position PARAMS ((file_ptr, int));
2613 static INLINE file_ptr
2614 align_file_position (off, align)
2618 return (off + align - 1) & ~(align - 1);
2621 /* Assign a file position to a section, optionally aligning to the
2622 required section alignment. */
2625 _bfd_elf_assign_file_position_for_section (i_shdrp, offset, align)
2626 Elf_Internal_Shdr *i_shdrp;
2634 al = i_shdrp->sh_addralign;
2636 offset = BFD_ALIGN (offset, al);
2638 i_shdrp->sh_offset = offset;
2639 if (i_shdrp->bfd_section != NULL)
2640 i_shdrp->bfd_section->filepos = offset;
2641 if (i_shdrp->sh_type != SHT_NOBITS)
2642 offset += i_shdrp->sh_size;
2646 /* Compute the file positions we are going to put the sections at, and
2647 otherwise prepare to begin writing out the ELF file. If LINK_INFO
2648 is not NULL, this is being called by the ELF backend linker. */
2651 _bfd_elf_compute_section_file_positions (abfd, link_info)
2653 struct bfd_link_info *link_info;
2655 struct elf_backend_data *bed = get_elf_backend_data (abfd);
2657 struct bfd_strtab_hash *strtab;
2658 Elf_Internal_Shdr *shstrtab_hdr;
2660 if (abfd->output_has_begun)
2663 /* Do any elf backend specific processing first. */
2664 if (bed->elf_backend_begin_write_processing)
2665 (*bed->elf_backend_begin_write_processing) (abfd, link_info);
2667 if (! prep_headers (abfd))
2670 /* Post process the headers if necessary. */
2671 if (bed->elf_backend_post_process_headers)
2672 (*bed->elf_backend_post_process_headers) (abfd, link_info);
2675 bfd_map_over_sections (abfd, elf_fake_sections, &failed);
2679 if (!assign_section_numbers (abfd))
2682 /* The backend linker builds symbol table information itself. */
2683 if (link_info == NULL && bfd_get_symcount (abfd) > 0)
2685 /* Non-zero if doing a relocatable link. */
2686 int relocatable_p = ! (abfd->flags & (EXEC_P | DYNAMIC));
2688 if (! swap_out_syms (abfd, &strtab, relocatable_p))
2692 if (link_info == NULL || link_info->relocateable)
2694 bfd_map_over_sections (abfd, set_group_contents, &failed);
2699 shstrtab_hdr = &elf_tdata (abfd)->shstrtab_hdr;
2700 /* sh_name was set in prep_headers. */
2701 shstrtab_hdr->sh_type = SHT_STRTAB;
2702 shstrtab_hdr->sh_flags = 0;
2703 shstrtab_hdr->sh_addr = 0;
2704 shstrtab_hdr->sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
2705 shstrtab_hdr->sh_entsize = 0;
2706 shstrtab_hdr->sh_link = 0;
2707 shstrtab_hdr->sh_info = 0;
2708 /* sh_offset is set in assign_file_positions_except_relocs. */
2709 shstrtab_hdr->sh_addralign = 1;
2711 if (!assign_file_positions_except_relocs (abfd))
2714 if (link_info == NULL && bfd_get_symcount (abfd) > 0)
2717 Elf_Internal_Shdr *hdr;
2719 off = elf_tdata (abfd)->next_file_pos;
2721 hdr = &elf_tdata (abfd)->symtab_hdr;
2722 off = _bfd_elf_assign_file_position_for_section (hdr, off, true);
2724 hdr = &elf_tdata (abfd)->strtab_hdr;
2725 off = _bfd_elf_assign_file_position_for_section (hdr, off, true);
2727 elf_tdata (abfd)->next_file_pos = off;
2729 /* Now that we know where the .strtab section goes, write it
2731 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
2732 || ! _bfd_stringtab_emit (abfd, strtab))
2734 _bfd_stringtab_free (strtab);
2737 abfd->output_has_begun = true;
2742 /* Create a mapping from a set of sections to a program segment. */
2744 static INLINE struct elf_segment_map *
2745 make_mapping (abfd, sections, from, to, phdr)
2747 asection **sections;
2752 struct elf_segment_map *m;
2757 amt = sizeof (struct elf_segment_map);
2758 amt += (to - from - 1) * sizeof (asection *);
2759 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
2763 m->p_type = PT_LOAD;
2764 for (i = from, hdrpp = sections + from; i < to; i++, hdrpp++)
2765 m->sections[i - from] = *hdrpp;
2766 m->count = to - from;
2768 if (from == 0 && phdr)
2770 /* Include the headers in the first PT_LOAD segment. */
2771 m->includes_filehdr = 1;
2772 m->includes_phdrs = 1;
2778 /* Set up a mapping from BFD sections to program segments. */
2781 map_sections_to_segments (abfd)
2784 asection **sections = NULL;
2788 struct elf_segment_map *mfirst;
2789 struct elf_segment_map **pm;
2790 struct elf_segment_map *m;
2792 unsigned int phdr_index;
2793 bfd_vma maxpagesize;
2795 boolean phdr_in_segment = true;
2800 if (elf_tdata (abfd)->segment_map != NULL)
2803 if (bfd_count_sections (abfd) == 0)
2806 /* Select the allocated sections, and sort them. */
2808 amt = bfd_count_sections (abfd) * sizeof (asection *);
2809 sections = (asection **) bfd_malloc (amt);
2810 if (sections == NULL)
2814 for (s = abfd->sections; s != NULL; s = s->next)
2816 if ((s->flags & SEC_ALLOC) != 0)
2822 BFD_ASSERT (i <= bfd_count_sections (abfd));
2825 qsort (sections, (size_t) count, sizeof (asection *), elf_sort_sections);
2827 /* Build the mapping. */
2832 /* If we have a .interp section, then create a PT_PHDR segment for
2833 the program headers and a PT_INTERP segment for the .interp
2835 s = bfd_get_section_by_name (abfd, ".interp");
2836 if (s != NULL && (s->flags & SEC_LOAD) != 0)
2838 amt = sizeof (struct elf_segment_map);
2839 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
2843 m->p_type = PT_PHDR;
2844 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
2845 m->p_flags = PF_R | PF_X;
2846 m->p_flags_valid = 1;
2847 m->includes_phdrs = 1;
2852 amt = sizeof (struct elf_segment_map);
2853 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
2857 m->p_type = PT_INTERP;
2865 /* Look through the sections. We put sections in the same program
2866 segment when the start of the second section can be placed within
2867 a few bytes of the end of the first section. */
2870 maxpagesize = get_elf_backend_data (abfd)->maxpagesize;
2872 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
2874 && (dynsec->flags & SEC_LOAD) == 0)
2877 /* Deal with -Ttext or something similar such that the first section
2878 is not adjacent to the program headers. This is an
2879 approximation, since at this point we don't know exactly how many
2880 program headers we will need. */
2883 bfd_size_type phdr_size;
2885 phdr_size = elf_tdata (abfd)->program_header_size;
2887 phdr_size = get_elf_backend_data (abfd)->s->sizeof_phdr;
2888 if ((abfd->flags & D_PAGED) == 0
2889 || sections[0]->lma < phdr_size
2890 || sections[0]->lma % maxpagesize < phdr_size % maxpagesize)
2891 phdr_in_segment = false;
2894 for (i = 0, hdrpp = sections; i < count; i++, hdrpp++)
2897 boolean new_segment;
2901 /* See if this section and the last one will fit in the same
2904 if (last_hdr == NULL)
2906 /* If we don't have a segment yet, then we don't need a new
2907 one (we build the last one after this loop). */
2908 new_segment = false;
2910 else if (last_hdr->lma - last_hdr->vma != hdr->lma - hdr->vma)
2912 /* If this section has a different relation between the
2913 virtual address and the load address, then we need a new
2917 else if (BFD_ALIGN (last_hdr->lma + last_hdr->_raw_size, maxpagesize)
2918 < BFD_ALIGN (hdr->lma, maxpagesize))
2920 /* If putting this section in this segment would force us to
2921 skip a page in the segment, then we need a new segment. */
2924 else if ((last_hdr->flags & SEC_LOAD) == 0
2925 && (hdr->flags & SEC_LOAD) != 0)
2927 /* We don't want to put a loadable section after a
2928 nonloadable section in the same segment. */
2931 else if ((abfd->flags & D_PAGED) == 0)
2933 /* If the file is not demand paged, which means that we
2934 don't require the sections to be correctly aligned in the
2935 file, then there is no other reason for a new segment. */
2936 new_segment = false;
2939 && (hdr->flags & SEC_READONLY) == 0
2940 && (BFD_ALIGN (last_hdr->lma + last_hdr->_raw_size, maxpagesize)
2943 /* We don't want to put a writable section in a read only
2944 segment, unless they are on the same page in memory
2945 anyhow. We already know that the last section does not
2946 bring us past the current section on the page, so the
2947 only case in which the new section is not on the same
2948 page as the previous section is when the previous section
2949 ends precisely on a page boundary. */
2954 /* Otherwise, we can use the same segment. */
2955 new_segment = false;
2960 if ((hdr->flags & SEC_READONLY) == 0)
2966 /* We need a new program segment. We must create a new program
2967 header holding all the sections from phdr_index until hdr. */
2969 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
2976 if ((hdr->flags & SEC_READONLY) == 0)
2983 phdr_in_segment = false;
2986 /* Create a final PT_LOAD program segment. */
2987 if (last_hdr != NULL)
2989 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
2997 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
3000 amt = sizeof (struct elf_segment_map);
3001 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3005 m->p_type = PT_DYNAMIC;
3007 m->sections[0] = dynsec;
3013 /* For each loadable .note section, add a PT_NOTE segment. We don't
3014 use bfd_get_section_by_name, because if we link together
3015 nonloadable .note sections and loadable .note sections, we will
3016 generate two .note sections in the output file. FIXME: Using
3017 names for section types is bogus anyhow. */
3018 for (s = abfd->sections; s != NULL; s = s->next)
3020 if ((s->flags & SEC_LOAD) != 0
3021 && strncmp (s->name, ".note", 5) == 0)
3023 amt = sizeof (struct elf_segment_map);
3024 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3028 m->p_type = PT_NOTE;
3040 elf_tdata (abfd)->segment_map = mfirst;
3044 if (sections != NULL)
3049 /* Sort sections by address. */
3052 elf_sort_sections (arg1, arg2)
3056 const asection *sec1 = *(const asection **) arg1;
3057 const asection *sec2 = *(const asection **) arg2;
3059 /* Sort by LMA first, since this is the address used to
3060 place the section into a segment. */
3061 if (sec1->lma < sec2->lma)
3063 else if (sec1->lma > sec2->lma)
3066 /* Then sort by VMA. Normally the LMA and the VMA will be
3067 the same, and this will do nothing. */
3068 if (sec1->vma < sec2->vma)
3070 else if (sec1->vma > sec2->vma)
3073 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
3075 #define TOEND(x) (((x)->flags & SEC_LOAD) == 0)
3081 /* If the indicies are the same, do not return 0
3082 here, but continue to try the next comparison. */
3083 if (sec1->target_index - sec2->target_index != 0)
3084 return sec1->target_index - sec2->target_index;
3089 else if (TOEND (sec2))
3094 /* Sort by size, to put zero sized sections
3095 before others at the same address. */
3097 if (sec1->_raw_size < sec2->_raw_size)
3099 if (sec1->_raw_size > sec2->_raw_size)
3102 return sec1->target_index - sec2->target_index;
3105 /* Assign file positions to the sections based on the mapping from
3106 sections to segments. This function also sets up some fields in
3107 the file header, and writes out the program headers. */
3110 assign_file_positions_for_segments (abfd)
3113 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3115 struct elf_segment_map *m;
3117 Elf_Internal_Phdr *phdrs;
3119 bfd_vma filehdr_vaddr, filehdr_paddr;
3120 bfd_vma phdrs_vaddr, phdrs_paddr;
3121 Elf_Internal_Phdr *p;
3124 if (elf_tdata (abfd)->segment_map == NULL)
3126 if (! map_sections_to_segments (abfd))
3130 if (bed->elf_backend_modify_segment_map)
3132 if (! (*bed->elf_backend_modify_segment_map) (abfd))
3137 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
3140 elf_elfheader (abfd)->e_phoff = bed->s->sizeof_ehdr;
3141 elf_elfheader (abfd)->e_phentsize = bed->s->sizeof_phdr;
3142 elf_elfheader (abfd)->e_phnum = count;
3147 /* If we already counted the number of program segments, make sure
3148 that we allocated enough space. This happens when SIZEOF_HEADERS
3149 is used in a linker script. */
3150 alloc = elf_tdata (abfd)->program_header_size / bed->s->sizeof_phdr;
3151 if (alloc != 0 && count > alloc)
3153 ((*_bfd_error_handler)
3154 (_("%s: Not enough room for program headers (allocated %u, need %u)"),
3155 bfd_get_filename (abfd), alloc, count));
3156 bfd_set_error (bfd_error_bad_value);
3163 amt = alloc * sizeof (Elf_Internal_Phdr);
3164 phdrs = (Elf_Internal_Phdr *) bfd_alloc (abfd, amt);
3168 off = bed->s->sizeof_ehdr;
3169 off += alloc * bed->s->sizeof_phdr;
3176 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
3183 /* If elf_segment_map is not from map_sections_to_segments, the
3184 sections may not be correctly ordered. */
3186 qsort (m->sections, (size_t) m->count, sizeof (asection *),
3189 p->p_type = m->p_type;
3190 p->p_flags = m->p_flags;
3192 if (p->p_type == PT_LOAD
3194 && (m->sections[0]->flags & SEC_ALLOC) != 0)
3196 if ((abfd->flags & D_PAGED) != 0)
3197 off += (m->sections[0]->vma - off) % bed->maxpagesize;
3200 bfd_size_type align;
3203 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
3205 bfd_size_type secalign;
3207 secalign = bfd_get_section_alignment (abfd, *secpp);
3208 if (secalign > align)
3212 off += (m->sections[0]->vma - off) % (1 << align);
3219 p->p_vaddr = m->sections[0]->vma;
3221 if (m->p_paddr_valid)
3222 p->p_paddr = m->p_paddr;
3223 else if (m->count == 0)
3226 p->p_paddr = m->sections[0]->lma;
3228 if (p->p_type == PT_LOAD
3229 && (abfd->flags & D_PAGED) != 0)
3230 p->p_align = bed->maxpagesize;
3231 else if (m->count == 0)
3232 p->p_align = bed->s->file_align;
3240 if (m->includes_filehdr)
3242 if (! m->p_flags_valid)
3245 p->p_filesz = bed->s->sizeof_ehdr;
3246 p->p_memsz = bed->s->sizeof_ehdr;
3249 BFD_ASSERT (p->p_type == PT_LOAD);
3251 if (p->p_vaddr < (bfd_vma) off)
3253 _bfd_error_handler (_("%s: Not enough room for program headers, try linking with -N"),
3254 bfd_get_filename (abfd));
3255 bfd_set_error (bfd_error_bad_value);
3260 if (! m->p_paddr_valid)
3263 if (p->p_type == PT_LOAD)
3265 filehdr_vaddr = p->p_vaddr;
3266 filehdr_paddr = p->p_paddr;
3270 if (m->includes_phdrs)
3272 if (! m->p_flags_valid)
3275 if (m->includes_filehdr)
3277 if (p->p_type == PT_LOAD)
3279 phdrs_vaddr = p->p_vaddr + bed->s->sizeof_ehdr;
3280 phdrs_paddr = p->p_paddr + bed->s->sizeof_ehdr;
3285 p->p_offset = bed->s->sizeof_ehdr;
3289 BFD_ASSERT (p->p_type == PT_LOAD);
3290 p->p_vaddr -= off - p->p_offset;
3291 if (! m->p_paddr_valid)
3292 p->p_paddr -= off - p->p_offset;
3295 if (p->p_type == PT_LOAD)
3297 phdrs_vaddr = p->p_vaddr;
3298 phdrs_paddr = p->p_paddr;
3301 phdrs_vaddr = bed->maxpagesize + bed->s->sizeof_ehdr;
3304 p->p_filesz += alloc * bed->s->sizeof_phdr;
3305 p->p_memsz += alloc * bed->s->sizeof_phdr;
3308 if (p->p_type == PT_LOAD
3309 || (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core))
3311 if (! m->includes_filehdr && ! m->includes_phdrs)
3317 adjust = off - (p->p_offset + p->p_filesz);
3318 p->p_filesz += adjust;
3319 p->p_memsz += adjust;
3325 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
3329 bfd_size_type align;
3333 align = 1 << bfd_get_section_alignment (abfd, sec);
3335 /* The section may have artificial alignment forced by a
3336 link script. Notice this case by the gap between the
3337 cumulative phdr lma and the section's lma. */
3338 if (p->p_paddr + p->p_memsz < sec->lma)
3340 bfd_vma adjust = sec->lma - (p->p_paddr + p->p_memsz);
3342 p->p_memsz += adjust;
3345 if ((flags & SEC_LOAD) != 0)
3346 p->p_filesz += adjust;
3349 if (p->p_type == PT_LOAD)
3351 bfd_signed_vma adjust;
3353 if ((flags & SEC_LOAD) != 0)
3355 adjust = sec->lma - (p->p_paddr + p->p_memsz);
3359 else if ((flags & SEC_ALLOC) != 0)
3361 /* The section VMA must equal the file position
3362 modulo the page size. FIXME: I'm not sure if
3363 this adjustment is really necessary. We used to
3364 not have the SEC_LOAD case just above, and then
3365 this was necessary, but now I'm not sure. */
3366 if ((abfd->flags & D_PAGED) != 0)
3367 adjust = (sec->vma - voff) % bed->maxpagesize;
3369 adjust = (sec->vma - voff) % align;
3378 (* _bfd_error_handler) (_("\
3379 Error: First section in segment (%s) starts at 0x%x whereas the segment starts at 0x%x"),
3380 bfd_section_name (abfd, sec),
3385 p->p_memsz += adjust;
3388 if ((flags & SEC_LOAD) != 0)
3389 p->p_filesz += adjust;
3394 /* We check SEC_HAS_CONTENTS here because if NOLOAD is
3395 used in a linker script we may have a section with
3396 SEC_LOAD clear but which is supposed to have
3398 if ((flags & SEC_LOAD) != 0
3399 || (flags & SEC_HAS_CONTENTS) != 0)
3400 off += sec->_raw_size;
3402 if ((flags & SEC_ALLOC) != 0)
3403 voff += sec->_raw_size;
3406 if (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core)
3408 /* The actual "note" segment has i == 0.
3409 This is the one that actually contains everything. */
3413 p->p_filesz = sec->_raw_size;
3414 off += sec->_raw_size;
3419 /* Fake sections -- don't need to be written. */
3422 flags = sec->flags = 0;
3429 p->p_memsz += sec->_raw_size;
3431 if ((flags & SEC_LOAD) != 0)
3432 p->p_filesz += sec->_raw_size;
3434 if (align > p->p_align
3435 && (p->p_type != PT_LOAD || (abfd->flags & D_PAGED) == 0))
3439 if (! m->p_flags_valid)
3442 if ((flags & SEC_CODE) != 0)
3444 if ((flags & SEC_READONLY) == 0)
3450 /* Now that we have set the section file positions, we can set up
3451 the file positions for the non PT_LOAD segments. */
3452 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
3456 if (p->p_type != PT_LOAD && m->count > 0)
3458 BFD_ASSERT (! m->includes_filehdr && ! m->includes_phdrs);
3459 p->p_offset = m->sections[0]->filepos;
3463 if (m->includes_filehdr)
3465 p->p_vaddr = filehdr_vaddr;
3466 if (! m->p_paddr_valid)
3467 p->p_paddr = filehdr_paddr;
3469 else if (m->includes_phdrs)
3471 p->p_vaddr = phdrs_vaddr;
3472 if (! m->p_paddr_valid)
3473 p->p_paddr = phdrs_paddr;
3478 /* Clear out any program headers we allocated but did not use. */
3479 for (; count < alloc; count++, p++)
3481 memset (p, 0, sizeof *p);
3482 p->p_type = PT_NULL;
3485 elf_tdata (abfd)->phdr = phdrs;
3487 elf_tdata (abfd)->next_file_pos = off;
3489 /* Write out the program headers. */
3490 if (bfd_seek (abfd, (bfd_signed_vma) bed->s->sizeof_ehdr, SEEK_SET) != 0
3491 || bed->s->write_out_phdrs (abfd, phdrs, alloc) != 0)
3497 /* Get the size of the program header.
3499 If this is called by the linker before any of the section VMA's are set, it
3500 can't calculate the correct value for a strange memory layout. This only
3501 happens when SIZEOF_HEADERS is used in a linker script. In this case,
3502 SORTED_HDRS is NULL and we assume the normal scenario of one text and one
3503 data segment (exclusive of .interp and .dynamic).
3505 ??? User written scripts must either not use SIZEOF_HEADERS, or assume there
3506 will be two segments. */
3508 static bfd_size_type
3509 get_program_header_size (abfd)
3514 struct elf_backend_data *bed = get_elf_backend_data (abfd);
3516 /* We can't return a different result each time we're called. */
3517 if (elf_tdata (abfd)->program_header_size != 0)
3518 return elf_tdata (abfd)->program_header_size;
3520 if (elf_tdata (abfd)->segment_map != NULL)
3522 struct elf_segment_map *m;
3525 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
3527 elf_tdata (abfd)->program_header_size = segs * bed->s->sizeof_phdr;
3528 return elf_tdata (abfd)->program_header_size;
3531 /* Assume we will need exactly two PT_LOAD segments: one for text
3532 and one for data. */
3535 s = bfd_get_section_by_name (abfd, ".interp");
3536 if (s != NULL && (s->flags & SEC_LOAD) != 0)
3538 /* If we have a loadable interpreter section, we need a
3539 PT_INTERP segment. In this case, assume we also need a
3540 PT_PHDR segment, although that may not be true for all
3545 if (bfd_get_section_by_name (abfd, ".dynamic") != NULL)
3547 /* We need a PT_DYNAMIC segment. */
3551 for (s = abfd->sections; s != NULL; s = s->next)
3553 if ((s->flags & SEC_LOAD) != 0
3554 && strncmp (s->name, ".note", 5) == 0)
3556 /* We need a PT_NOTE segment. */
3561 /* Let the backend count up any program headers it might need. */
3562 if (bed->elf_backend_additional_program_headers)
3566 a = (*bed->elf_backend_additional_program_headers) (abfd);
3572 elf_tdata (abfd)->program_header_size = segs * bed->s->sizeof_phdr;
3573 return elf_tdata (abfd)->program_header_size;
3576 /* Work out the file positions of all the sections. This is called by
3577 _bfd_elf_compute_section_file_positions. All the section sizes and
3578 VMAs must be known before this is called.
3580 We do not consider reloc sections at this point, unless they form
3581 part of the loadable image. Reloc sections are assigned file
3582 positions in assign_file_positions_for_relocs, which is called by
3583 write_object_contents and final_link.
3585 We also don't set the positions of the .symtab and .strtab here. */
3588 assign_file_positions_except_relocs (abfd)
3591 struct elf_obj_tdata * const tdata = elf_tdata (abfd);
3592 Elf_Internal_Ehdr * const i_ehdrp = elf_elfheader (abfd);
3593 Elf_Internal_Shdr ** const i_shdrpp = elf_elfsections (abfd);
3595 struct elf_backend_data *bed = get_elf_backend_data (abfd);
3597 if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0
3598 && bfd_get_format (abfd) != bfd_core)
3600 Elf_Internal_Shdr **hdrpp;
3603 /* Start after the ELF header. */
3604 off = i_ehdrp->e_ehsize;
3606 /* We are not creating an executable, which means that we are
3607 not creating a program header, and that the actual order of
3608 the sections in the file is unimportant. */
3609 for (i = 1, hdrpp = i_shdrpp + 1; i < i_ehdrp->e_shnum; i++, hdrpp++)
3611 Elf_Internal_Shdr *hdr;
3614 if (hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
3616 hdr->sh_offset = -1;
3619 if (i == tdata->symtab_section
3620 || i == tdata->strtab_section)
3622 hdr->sh_offset = -1;
3626 off = _bfd_elf_assign_file_position_for_section (hdr, off, true);
3632 Elf_Internal_Shdr **hdrpp;
3634 /* Assign file positions for the loaded sections based on the
3635 assignment of sections to segments. */
3636 if (! assign_file_positions_for_segments (abfd))
3639 /* Assign file positions for the other sections. */
3641 off = elf_tdata (abfd)->next_file_pos;
3642 for (i = 1, hdrpp = i_shdrpp + 1; i < i_ehdrp->e_shnum; i++, hdrpp++)
3644 Elf_Internal_Shdr *hdr;
3647 if (hdr->bfd_section != NULL
3648 && hdr->bfd_section->filepos != 0)
3649 hdr->sh_offset = hdr->bfd_section->filepos;
3650 else if ((hdr->sh_flags & SHF_ALLOC) != 0)
3652 ((*_bfd_error_handler)
3653 (_("%s: warning: allocated section `%s' not in segment"),
3654 bfd_get_filename (abfd),
3655 (hdr->bfd_section == NULL
3657 : hdr->bfd_section->name)));
3658 if ((abfd->flags & D_PAGED) != 0)
3659 off += (hdr->sh_addr - off) % bed->maxpagesize;
3661 off += (hdr->sh_addr - off) % hdr->sh_addralign;
3662 off = _bfd_elf_assign_file_position_for_section (hdr, off,
3665 else if (hdr->sh_type == SHT_REL
3666 || hdr->sh_type == SHT_RELA
3667 || hdr == i_shdrpp[tdata->symtab_section]
3668 || hdr == i_shdrpp[tdata->strtab_section])
3669 hdr->sh_offset = -1;
3671 off = _bfd_elf_assign_file_position_for_section (hdr, off, true);
3675 /* Place the section headers. */
3676 off = align_file_position (off, bed->s->file_align);
3677 i_ehdrp->e_shoff = off;
3678 off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize;
3680 elf_tdata (abfd)->next_file_pos = off;
3689 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
3690 Elf_Internal_Phdr *i_phdrp = 0; /* Program header table, internal form */
3691 Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */
3693 struct elf_strtab_hash *shstrtab;
3694 struct elf_backend_data *bed = get_elf_backend_data (abfd);
3696 i_ehdrp = elf_elfheader (abfd);
3697 i_shdrp = elf_elfsections (abfd);
3699 shstrtab = _bfd_elf_strtab_init ();
3700 if (shstrtab == NULL)
3703 elf_shstrtab (abfd) = shstrtab;
3705 i_ehdrp->e_ident[EI_MAG0] = ELFMAG0;
3706 i_ehdrp->e_ident[EI_MAG1] = ELFMAG1;
3707 i_ehdrp->e_ident[EI_MAG2] = ELFMAG2;
3708 i_ehdrp->e_ident[EI_MAG3] = ELFMAG3;
3710 i_ehdrp->e_ident[EI_CLASS] = bed->s->elfclass;
3711 i_ehdrp->e_ident[EI_DATA] =
3712 bfd_big_endian (abfd) ? ELFDATA2MSB : ELFDATA2LSB;
3713 i_ehdrp->e_ident[EI_VERSION] = bed->s->ev_current;
3715 i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_NONE;
3716 i_ehdrp->e_ident[EI_ABIVERSION] = 0;
3718 for (count = EI_PAD; count < EI_NIDENT; count++)
3719 i_ehdrp->e_ident[count] = 0;
3721 if ((abfd->flags & DYNAMIC) != 0)
3722 i_ehdrp->e_type = ET_DYN;
3723 else if ((abfd->flags & EXEC_P) != 0)
3724 i_ehdrp->e_type = ET_EXEC;
3725 else if (bfd_get_format (abfd) == bfd_core)
3726 i_ehdrp->e_type = ET_CORE;
3728 i_ehdrp->e_type = ET_REL;
3730 switch (bfd_get_arch (abfd))
3732 case bfd_arch_unknown:
3733 i_ehdrp->e_machine = EM_NONE;
3736 /* There used to be a long list of cases here, each one setting
3737 e_machine to the same EM_* macro #defined as ELF_MACHINE_CODE
3738 in the corresponding bfd definition. To avoid duplication,
3739 the switch was removed. Machines that need special handling
3740 can generally do it in elf_backend_final_write_processing(),
3741 unless they need the information earlier than the final write.
3742 Such need can generally be supplied by replacing the tests for
3743 e_machine with the conditions used to determine it. */
3745 if (get_elf_backend_data (abfd) != NULL)
3746 i_ehdrp->e_machine = get_elf_backend_data (abfd)->elf_machine_code;
3748 i_ehdrp->e_machine = EM_NONE;
3751 i_ehdrp->e_version = bed->s->ev_current;
3752 i_ehdrp->e_ehsize = bed->s->sizeof_ehdr;
3754 /* No program header, for now. */
3755 i_ehdrp->e_phoff = 0;
3756 i_ehdrp->e_phentsize = 0;
3757 i_ehdrp->e_phnum = 0;
3759 /* Each bfd section is section header entry. */
3760 i_ehdrp->e_entry = bfd_get_start_address (abfd);
3761 i_ehdrp->e_shentsize = bed->s->sizeof_shdr;
3763 /* If we're building an executable, we'll need a program header table. */
3764 if (abfd->flags & EXEC_P)
3766 /* It all happens later. */
3768 i_ehdrp->e_phentsize = sizeof (Elf_External_Phdr);
3770 /* elf_build_phdrs() returns a (NULL-terminated) array of
3771 Elf_Internal_Phdrs. */
3772 i_phdrp = elf_build_phdrs (abfd, i_ehdrp, i_shdrp, &i_ehdrp->e_phnum);
3773 i_ehdrp->e_phoff = outbase;
3774 outbase += i_ehdrp->e_phentsize * i_ehdrp->e_phnum;
3779 i_ehdrp->e_phentsize = 0;
3781 i_ehdrp->e_phoff = 0;
3784 elf_tdata (abfd)->symtab_hdr.sh_name =
3785 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".symtab", false);
3786 elf_tdata (abfd)->strtab_hdr.sh_name =
3787 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".strtab", false);
3788 elf_tdata (abfd)->shstrtab_hdr.sh_name =
3789 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".shstrtab", false);
3790 if (elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
3791 || elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
3792 || elf_tdata (abfd)->shstrtab_hdr.sh_name == (unsigned int) -1)
3798 /* Assign file positions for all the reloc sections which are not part
3799 of the loadable file image. */
3802 _bfd_elf_assign_file_positions_for_relocs (abfd)
3807 Elf_Internal_Shdr **shdrpp;
3809 off = elf_tdata (abfd)->next_file_pos;
3811 for (i = 1, shdrpp = elf_elfsections (abfd) + 1;
3812 i < elf_elfheader (abfd)->e_shnum;
3815 Elf_Internal_Shdr *shdrp;
3818 if ((shdrp->sh_type == SHT_REL || shdrp->sh_type == SHT_RELA)
3819 && shdrp->sh_offset == -1)
3820 off = _bfd_elf_assign_file_position_for_section (shdrp, off, true);
3823 elf_tdata (abfd)->next_file_pos = off;
3827 _bfd_elf_write_object_contents (abfd)
3830 struct elf_backend_data *bed = get_elf_backend_data (abfd);
3831 Elf_Internal_Ehdr *i_ehdrp;
3832 Elf_Internal_Shdr **i_shdrp;
3836 if (! abfd->output_has_begun
3837 && ! _bfd_elf_compute_section_file_positions
3838 (abfd, (struct bfd_link_info *) NULL))
3841 i_shdrp = elf_elfsections (abfd);
3842 i_ehdrp = elf_elfheader (abfd);
3845 bfd_map_over_sections (abfd, bed->s->write_relocs, &failed);
3849 _bfd_elf_assign_file_positions_for_relocs (abfd);
3851 /* After writing the headers, we need to write the sections too... */
3852 for (count = 1; count < i_ehdrp->e_shnum; count++)
3854 if (bed->elf_backend_section_processing)
3855 (*bed->elf_backend_section_processing) (abfd, i_shdrp[count]);
3856 if (i_shdrp[count]->contents)
3858 bfd_size_type amt = i_shdrp[count]->sh_size;
3860 if (bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET) != 0
3861 || bfd_bwrite (i_shdrp[count]->contents, amt, abfd) != amt)
3866 /* Write out the section header names. */
3867 if (bfd_seek (abfd, elf_tdata (abfd)->shstrtab_hdr.sh_offset, SEEK_SET) != 0
3868 || ! _bfd_elf_strtab_emit (abfd, elf_shstrtab (abfd)))
3871 if (bed->elf_backend_final_write_processing)
3872 (*bed->elf_backend_final_write_processing) (abfd,
3873 elf_tdata (abfd)->linker);
3875 return bed->s->write_shdrs_and_ehdr (abfd);
3879 _bfd_elf_write_corefile_contents (abfd)
3882 /* Hopefully this can be done just like an object file. */
3883 return _bfd_elf_write_object_contents (abfd);
3886 /* Given a section, search the header to find them. */
3889 _bfd_elf_section_from_bfd_section (abfd, asect)
3893 struct elf_backend_data *bed = get_elf_backend_data (abfd);
3894 Elf_Internal_Shdr **i_shdrp = elf_elfsections (abfd);
3896 Elf_Internal_Shdr *hdr;
3897 int maxindex = elf_elfheader (abfd)->e_shnum;
3899 for (index = 0; index < maxindex; index++)
3901 hdr = i_shdrp[index];
3902 if (hdr->bfd_section == asect)
3906 if (bed->elf_backend_section_from_bfd_section)
3908 for (index = 0; index < maxindex; index++)
3912 hdr = i_shdrp[index];
3914 if ((*bed->elf_backend_section_from_bfd_section)
3915 (abfd, hdr, asect, &retval))
3920 if (bfd_is_abs_section (asect))
3922 if (bfd_is_com_section (asect))
3924 if (bfd_is_und_section (asect))
3927 bfd_set_error (bfd_error_nonrepresentable_section);
3932 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
3936 _bfd_elf_symbol_from_bfd_symbol (abfd, asym_ptr_ptr)
3938 asymbol **asym_ptr_ptr;
3940 asymbol *asym_ptr = *asym_ptr_ptr;
3942 flagword flags = asym_ptr->flags;
3944 /* When gas creates relocations against local labels, it creates its
3945 own symbol for the section, but does put the symbol into the
3946 symbol chain, so udata is 0. When the linker is generating
3947 relocatable output, this section symbol may be for one of the
3948 input sections rather than the output section. */
3949 if (asym_ptr->udata.i == 0
3950 && (flags & BSF_SECTION_SYM)
3951 && asym_ptr->section)
3955 if (asym_ptr->section->output_section != NULL)
3956 indx = asym_ptr->section->output_section->index;
3958 indx = asym_ptr->section->index;
3959 if (indx < elf_num_section_syms (abfd)
3960 && elf_section_syms (abfd)[indx] != NULL)
3961 asym_ptr->udata.i = elf_section_syms (abfd)[indx]->udata.i;
3964 idx = asym_ptr->udata.i;
3968 /* This case can occur when using --strip-symbol on a symbol
3969 which is used in a relocation entry. */
3970 (*_bfd_error_handler)
3971 (_("%s: symbol `%s' required but not present"),
3972 bfd_archive_filename (abfd), bfd_asymbol_name (asym_ptr));
3973 bfd_set_error (bfd_error_no_symbols);
3980 _("elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n"),
3981 (long) asym_ptr, asym_ptr->name, idx, flags,
3982 elf_symbol_flags (flags));
3990 /* Copy private BFD data. This copies any program header information. */
3993 copy_private_bfd_data (ibfd, obfd)
3997 Elf_Internal_Ehdr * iehdr;
3998 struct elf_segment_map * map;
3999 struct elf_segment_map * map_first;
4000 struct elf_segment_map ** pointer_to_map;
4001 Elf_Internal_Phdr * segment;
4004 unsigned int num_segments;
4005 boolean phdr_included = false;
4006 bfd_vma maxpagesize;
4007 struct elf_segment_map * phdr_adjust_seg = NULL;
4008 unsigned int phdr_adjust_num = 0;
4010 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
4011 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
4014 if (elf_tdata (ibfd)->phdr == NULL)
4017 iehdr = elf_elfheader (ibfd);
4020 pointer_to_map = &map_first;
4022 num_segments = elf_elfheader (ibfd)->e_phnum;
4023 maxpagesize = get_elf_backend_data (obfd)->maxpagesize;
4025 /* Returns the end address of the segment + 1. */
4026 #define SEGMENT_END(segment, start) \
4027 (start + (segment->p_memsz > segment->p_filesz \
4028 ? segment->p_memsz : segment->p_filesz))
4030 /* Returns true if the given section is contained within
4031 the given segment. VMA addresses are compared. */
4032 #define IS_CONTAINED_BY_VMA(section, segment) \
4033 (section->vma >= segment->p_vaddr \
4034 && (section->vma + section->_raw_size) \
4035 <= (SEGMENT_END (segment, segment->p_vaddr)))
4037 /* Returns true if the given section is contained within
4038 the given segment. LMA addresses are compared. */
4039 #define IS_CONTAINED_BY_LMA(section, segment, base) \
4040 (section->lma >= base \
4041 && (section->lma + section->_raw_size) \
4042 <= SEGMENT_END (segment, base))
4044 /* Special case: corefile "NOTE" section containing regs, prpsinfo etc. */
4045 #define IS_COREFILE_NOTE(p, s) \
4046 (p->p_type == PT_NOTE \
4047 && bfd_get_format (ibfd) == bfd_core \
4048 && s->vma == 0 && s->lma == 0 \
4049 && (bfd_vma) s->filepos >= p->p_offset \
4050 && (bfd_vma) s->filepos + s->_raw_size \
4051 <= p->p_offset + p->p_filesz)
4053 /* The complicated case when p_vaddr is 0 is to handle the Solaris
4054 linker, which generates a PT_INTERP section with p_vaddr and
4055 p_memsz set to 0. */
4056 #define IS_SOLARIS_PT_INTERP(p, s) \
4058 && p->p_filesz > 0 \
4059 && (s->flags & SEC_HAS_CONTENTS) != 0 \
4060 && s->_raw_size > 0 \
4061 && (bfd_vma) s->filepos >= p->p_offset \
4062 && ((bfd_vma) s->filepos + s->_raw_size \
4063 <= p->p_offset + p->p_filesz))
4065 /* Decide if the given section should be included in the given segment.
4066 A section will be included if:
4067 1. It is within the address space of the segment -- we use the LMA
4068 if that is set for the segment and the VMA otherwise,
4069 2. It is an allocated segment,
4070 3. There is an output section associated with it,
4071 4. The section has not already been allocated to a previous segment. */
4072 #define INCLUDE_SECTION_IN_SEGMENT(section, segment) \
4073 (((((segment->p_paddr \
4074 ? IS_CONTAINED_BY_LMA (section, segment, segment->p_paddr) \
4075 : IS_CONTAINED_BY_VMA (section, segment)) \
4076 || IS_SOLARIS_PT_INTERP (segment, section)) \
4077 && (section->flags & SEC_ALLOC) != 0) \
4078 || IS_COREFILE_NOTE (segment, section)) \
4079 && section->output_section != NULL \
4080 && section->segment_mark == false)
4082 /* Returns true iff seg1 starts after the end of seg2. */
4083 #define SEGMENT_AFTER_SEGMENT(seg1, seg2) \
4084 (seg1->p_vaddr >= SEGMENT_END (seg2, seg2->p_vaddr))
4086 /* Returns true iff seg1 and seg2 overlap. */
4087 #define SEGMENT_OVERLAPS(seg1, seg2) \
4088 (!(SEGMENT_AFTER_SEGMENT (seg1, seg2) || SEGMENT_AFTER_SEGMENT (seg2, seg1)))
4090 /* Initialise the segment mark field. */
4091 for (section = ibfd->sections; section != NULL; section = section->next)
4092 section->segment_mark = false;
4094 /* Scan through the segments specified in the program header
4095 of the input BFD. For this first scan we look for overlaps
4096 in the loadable segments. These can be created by wierd
4097 parameters to objcopy. */
4098 for (i = 0, segment = elf_tdata (ibfd)->phdr;
4103 Elf_Internal_Phdr *segment2;
4105 if (segment->p_type != PT_LOAD)
4108 /* Determine if this segment overlaps any previous segments. */
4109 for (j = 0, segment2 = elf_tdata (ibfd)->phdr; j < i; j++, segment2 ++)
4111 bfd_signed_vma extra_length;
4113 if (segment2->p_type != PT_LOAD
4114 || ! SEGMENT_OVERLAPS (segment, segment2))
4117 /* Merge the two segments together. */
4118 if (segment2->p_vaddr < segment->p_vaddr)
4120 /* Extend SEGMENT2 to include SEGMENT and then delete
4123 SEGMENT_END (segment, segment->p_vaddr)
4124 - SEGMENT_END (segment2, segment2->p_vaddr);
4126 if (extra_length > 0)
4128 segment2->p_memsz += extra_length;
4129 segment2->p_filesz += extra_length;
4132 segment->p_type = PT_NULL;
4134 /* Since we have deleted P we must restart the outer loop. */
4136 segment = elf_tdata (ibfd)->phdr;
4141 /* Extend SEGMENT to include SEGMENT2 and then delete
4144 SEGMENT_END (segment2, segment2->p_vaddr)
4145 - SEGMENT_END (segment, segment->p_vaddr);
4147 if (extra_length > 0)
4149 segment->p_memsz += extra_length;
4150 segment->p_filesz += extra_length;
4153 segment2->p_type = PT_NULL;
4158 /* The second scan attempts to assign sections to segments. */
4159 for (i = 0, segment = elf_tdata (ibfd)->phdr;
4163 unsigned int section_count;
4164 asection ** sections;
4165 asection * output_section;
4167 bfd_vma matching_lma;
4168 bfd_vma suggested_lma;
4172 if (segment->p_type == PT_NULL)
4175 /* Compute how many sections might be placed into this segment. */
4177 for (section = ibfd->sections; section != NULL; section = section->next)
4178 if (INCLUDE_SECTION_IN_SEGMENT (section, segment))
4181 /* Allocate a segment map big enough to contain all of the
4182 sections we have selected. */
4183 amt = sizeof (struct elf_segment_map);
4184 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
4185 map = (struct elf_segment_map *) bfd_alloc (obfd, amt);
4189 /* Initialise the fields of the segment map. Default to
4190 using the physical address of the segment in the input BFD. */
4192 map->p_type = segment->p_type;
4193 map->p_flags = segment->p_flags;
4194 map->p_flags_valid = 1;
4195 map->p_paddr = segment->p_paddr;
4196 map->p_paddr_valid = 1;
4198 /* Determine if this segment contains the ELF file header
4199 and if it contains the program headers themselves. */
4200 map->includes_filehdr = (segment->p_offset == 0
4201 && segment->p_filesz >= iehdr->e_ehsize);
4203 map->includes_phdrs = 0;
4205 if (! phdr_included || segment->p_type != PT_LOAD)
4207 map->includes_phdrs =
4208 (segment->p_offset <= (bfd_vma) iehdr->e_phoff
4209 && (segment->p_offset + segment->p_filesz
4210 >= ((bfd_vma) iehdr->e_phoff
4211 + iehdr->e_phnum * iehdr->e_phentsize)));
4213 if (segment->p_type == PT_LOAD && map->includes_phdrs)
4214 phdr_included = true;
4217 if (section_count == 0)
4219 /* Special segments, such as the PT_PHDR segment, may contain
4220 no sections, but ordinary, loadable segments should contain
4222 if (segment->p_type == PT_LOAD)
4224 (_("%s: warning: Empty loadable segment detected\n"),
4225 bfd_archive_filename (ibfd));
4228 *pointer_to_map = map;
4229 pointer_to_map = &map->next;
4234 /* Now scan the sections in the input BFD again and attempt
4235 to add their corresponding output sections to the segment map.
4236 The problem here is how to handle an output section which has
4237 been moved (ie had its LMA changed). There are four possibilities:
4239 1. None of the sections have been moved.
4240 In this case we can continue to use the segment LMA from the
4243 2. All of the sections have been moved by the same amount.
4244 In this case we can change the segment's LMA to match the LMA
4245 of the first section.
4247 3. Some of the sections have been moved, others have not.
4248 In this case those sections which have not been moved can be
4249 placed in the current segment which will have to have its size,
4250 and possibly its LMA changed, and a new segment or segments will
4251 have to be created to contain the other sections.
4253 4. The sections have been moved, but not be the same amount.
4254 In this case we can change the segment's LMA to match the LMA
4255 of the first section and we will have to create a new segment
4256 or segments to contain the other sections.
4258 In order to save time, we allocate an array to hold the section
4259 pointers that we are interested in. As these sections get assigned
4260 to a segment, they are removed from this array. */
4262 amt = (bfd_size_type) section_count * sizeof (asection *);
4263 sections = (asection **) bfd_malloc (amt);
4264 if (sections == NULL)
4267 /* Step One: Scan for segment vs section LMA conflicts.
4268 Also add the sections to the section array allocated above.
4269 Also add the sections to the current segment. In the common
4270 case, where the sections have not been moved, this means that
4271 we have completely filled the segment, and there is nothing
4277 for (j = 0, section = ibfd->sections;
4279 section = section->next)
4281 if (INCLUDE_SECTION_IN_SEGMENT (section, segment))
4283 output_section = section->output_section;
4285 sections[j ++] = section;
4287 /* The Solaris native linker always sets p_paddr to 0.
4288 We try to catch that case here, and set it to the
4290 if (segment->p_paddr == 0
4291 && segment->p_vaddr != 0
4293 && output_section->lma != 0
4294 && (output_section->vma == (segment->p_vaddr
4295 + (map->includes_filehdr
4298 + (map->includes_phdrs
4300 * iehdr->e_phentsize)
4302 map->p_paddr = segment->p_vaddr;
4304 /* Match up the physical address of the segment with the
4305 LMA address of the output section. */
4306 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
4307 || IS_COREFILE_NOTE (segment, section))
4309 if (matching_lma == 0)
4310 matching_lma = output_section->lma;
4312 /* We assume that if the section fits within the segment
4313 then it does not overlap any other section within that
4315 map->sections[isec ++] = output_section;
4317 else if (suggested_lma == 0)
4318 suggested_lma = output_section->lma;
4322 BFD_ASSERT (j == section_count);
4324 /* Step Two: Adjust the physical address of the current segment,
4326 if (isec == section_count)
4328 /* All of the sections fitted within the segment as currently
4329 specified. This is the default case. Add the segment to
4330 the list of built segments and carry on to process the next
4331 program header in the input BFD. */
4332 map->count = section_count;
4333 *pointer_to_map = map;
4334 pointer_to_map = &map->next;
4341 if (matching_lma != 0)
4343 /* At least one section fits inside the current segment.
4344 Keep it, but modify its physical address to match the
4345 LMA of the first section that fitted. */
4346 map->p_paddr = matching_lma;
4350 /* None of the sections fitted inside the current segment.
4351 Change the current segment's physical address to match
4352 the LMA of the first section. */
4353 map->p_paddr = suggested_lma;
4356 /* Offset the segment physical address from the lma
4357 to allow for space taken up by elf headers. */
4358 if (map->includes_filehdr)
4359 map->p_paddr -= iehdr->e_ehsize;
4361 if (map->includes_phdrs)
4363 map->p_paddr -= iehdr->e_phnum * iehdr->e_phentsize;
4365 /* iehdr->e_phnum is just an estimate of the number
4366 of program headers that we will need. Make a note
4367 here of the number we used and the segment we chose
4368 to hold these headers, so that we can adjust the
4369 offset when we know the correct value. */
4370 phdr_adjust_num = iehdr->e_phnum;
4371 phdr_adjust_seg = map;
4375 /* Step Three: Loop over the sections again, this time assigning
4376 those that fit to the current segment and remvoing them from the
4377 sections array; but making sure not to leave large gaps. Once all
4378 possible sections have been assigned to the current segment it is
4379 added to the list of built segments and if sections still remain
4380 to be assigned, a new segment is constructed before repeating
4388 /* Fill the current segment with sections that fit. */
4389 for (j = 0; j < section_count; j++)
4391 section = sections[j];
4393 if (section == NULL)
4396 output_section = section->output_section;
4398 BFD_ASSERT (output_section != NULL);
4400 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
4401 || IS_COREFILE_NOTE (segment, section))
4403 if (map->count == 0)
4405 /* If the first section in a segment does not start at
4406 the beginning of the segment, then something is
4408 if (output_section->lma !=
4410 + (map->includes_filehdr ? iehdr->e_ehsize : 0)
4411 + (map->includes_phdrs
4412 ? iehdr->e_phnum * iehdr->e_phentsize
4418 asection * prev_sec;
4420 prev_sec = map->sections[map->count - 1];
4422 /* If the gap between the end of the previous section
4423 and the start of this section is more than
4424 maxpagesize then we need to start a new segment. */
4425 if ((BFD_ALIGN (prev_sec->lma + prev_sec->_raw_size,
4427 < BFD_ALIGN (output_section->lma, maxpagesize))
4428 || ((prev_sec->lma + prev_sec->_raw_size)
4429 > output_section->lma))
4431 if (suggested_lma == 0)
4432 suggested_lma = output_section->lma;
4438 map->sections[map->count++] = output_section;
4441 section->segment_mark = true;
4443 else if (suggested_lma == 0)
4444 suggested_lma = output_section->lma;
4447 BFD_ASSERT (map->count > 0);
4449 /* Add the current segment to the list of built segments. */
4450 *pointer_to_map = map;
4451 pointer_to_map = &map->next;
4453 if (isec < section_count)
4455 /* We still have not allocated all of the sections to
4456 segments. Create a new segment here, initialise it
4457 and carry on looping. */
4458 amt = sizeof (struct elf_segment_map);
4459 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
4460 map = (struct elf_segment_map *) bfd_alloc (obfd, amt);
4464 /* Initialise the fields of the segment map. Set the physical
4465 physical address to the LMA of the first section that has
4466 not yet been assigned. */
4468 map->p_type = segment->p_type;
4469 map->p_flags = segment->p_flags;
4470 map->p_flags_valid = 1;
4471 map->p_paddr = suggested_lma;
4472 map->p_paddr_valid = 1;
4473 map->includes_filehdr = 0;
4474 map->includes_phdrs = 0;
4477 while (isec < section_count);
4482 /* The Solaris linker creates program headers in which all the
4483 p_paddr fields are zero. When we try to objcopy or strip such a
4484 file, we get confused. Check for this case, and if we find it
4485 reset the p_paddr_valid fields. */
4486 for (map = map_first; map != NULL; map = map->next)
4487 if (map->p_paddr != 0)
4491 for (map = map_first; map != NULL; map = map->next)
4492 map->p_paddr_valid = 0;
4495 elf_tdata (obfd)->segment_map = map_first;
4497 /* If we had to estimate the number of program headers that were
4498 going to be needed, then check our estimate know and adjust
4499 the offset if necessary. */
4500 if (phdr_adjust_seg != NULL)
4504 for (count = 0, map = map_first; map != NULL; map = map->next)
4507 if (count > phdr_adjust_num)
4508 phdr_adjust_seg->p_paddr
4509 -= (count - phdr_adjust_num) * iehdr->e_phentsize;
4513 /* Final Step: Sort the segments into ascending order of physical
4515 if (map_first != NULL)
4517 struct elf_segment_map *prev;
4520 for (map = map_first->next; map != NULL; prev = map, map = map->next)
4522 /* Yes I know - its a bubble sort.... */
4523 if (map->next != NULL && (map->next->p_paddr < map->p_paddr))
4525 /* Swap map and map->next. */
4526 prev->next = map->next;
4527 map->next = map->next->next;
4528 prev->next->next = map;
4538 #undef IS_CONTAINED_BY_VMA
4539 #undef IS_CONTAINED_BY_LMA
4540 #undef IS_COREFILE_NOTE
4541 #undef IS_SOLARIS_PT_INTERP
4542 #undef INCLUDE_SECTION_IN_SEGMENT
4543 #undef SEGMENT_AFTER_SEGMENT
4544 #undef SEGMENT_OVERLAPS
4548 /* Copy private section information. This copies over the entsize
4549 field, and sometimes the info field. */
4552 _bfd_elf_copy_private_section_data (ibfd, isec, obfd, osec)
4558 Elf_Internal_Shdr *ihdr, *ohdr;
4560 if (ibfd->xvec->flavour != bfd_target_elf_flavour
4561 || obfd->xvec->flavour != bfd_target_elf_flavour)
4564 /* Copy over private BFD data if it has not already been copied.
4565 This must be done here, rather than in the copy_private_bfd_data
4566 entry point, because the latter is called after the section
4567 contents have been set, which means that the program headers have
4568 already been worked out. */
4569 if (elf_tdata (obfd)->segment_map == NULL
4570 && elf_tdata (ibfd)->phdr != NULL)
4574 /* Only set up the segments if there are no more SEC_ALLOC
4575 sections. FIXME: This won't do the right thing if objcopy is
4576 used to remove the last SEC_ALLOC section, since objcopy
4577 won't call this routine in that case. */
4578 for (s = isec->next; s != NULL; s = s->next)
4579 if ((s->flags & SEC_ALLOC) != 0)
4583 if (! copy_private_bfd_data (ibfd, obfd))
4588 ihdr = &elf_section_data (isec)->this_hdr;
4589 ohdr = &elf_section_data (osec)->this_hdr;
4591 ohdr->sh_entsize = ihdr->sh_entsize;
4593 if (ihdr->sh_type == SHT_SYMTAB
4594 || ihdr->sh_type == SHT_DYNSYM
4595 || ihdr->sh_type == SHT_GNU_verneed
4596 || ihdr->sh_type == SHT_GNU_verdef)
4597 ohdr->sh_info = ihdr->sh_info;
4599 elf_section_data (osec)->use_rela_p
4600 = elf_section_data (isec)->use_rela_p;
4605 /* Copy private symbol information. If this symbol is in a section
4606 which we did not map into a BFD section, try to map the section
4607 index correctly. We use special macro definitions for the mapped
4608 section indices; these definitions are interpreted by the
4609 swap_out_syms function. */
4611 #define MAP_ONESYMTAB (SHN_LORESERVE - 1)
4612 #define MAP_DYNSYMTAB (SHN_LORESERVE - 2)
4613 #define MAP_STRTAB (SHN_LORESERVE - 3)
4614 #define MAP_SHSTRTAB (SHN_LORESERVE - 4)
4617 _bfd_elf_copy_private_symbol_data (ibfd, isymarg, obfd, osymarg)
4623 elf_symbol_type *isym, *osym;
4625 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
4626 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
4629 isym = elf_symbol_from (ibfd, isymarg);
4630 osym = elf_symbol_from (obfd, osymarg);
4634 && bfd_is_abs_section (isym->symbol.section))
4638 shndx = isym->internal_elf_sym.st_shndx;
4639 if (shndx == elf_onesymtab (ibfd))
4640 shndx = MAP_ONESYMTAB;
4641 else if (shndx == elf_dynsymtab (ibfd))
4642 shndx = MAP_DYNSYMTAB;
4643 else if (shndx == elf_tdata (ibfd)->strtab_section)
4645 else if (shndx == elf_tdata (ibfd)->shstrtab_section)
4646 shndx = MAP_SHSTRTAB;
4647 osym->internal_elf_sym.st_shndx = shndx;
4653 /* Swap out the symbols. */
4656 swap_out_syms (abfd, sttp, relocatable_p)
4658 struct bfd_strtab_hash **sttp;
4661 struct elf_backend_data *bed;
4664 struct bfd_strtab_hash *stt;
4665 Elf_Internal_Shdr *symtab_hdr;
4666 Elf_Internal_Shdr *symstrtab_hdr;
4667 char *outbound_syms;
4671 if (!elf_map_symbols (abfd))
4674 /* Dump out the symtabs. */
4675 stt = _bfd_elf_stringtab_init ();
4679 bed = get_elf_backend_data (abfd);
4680 symcount = bfd_get_symcount (abfd);
4681 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4682 symtab_hdr->sh_type = SHT_SYMTAB;
4683 symtab_hdr->sh_entsize = bed->s->sizeof_sym;
4684 symtab_hdr->sh_size = symtab_hdr->sh_entsize * (symcount + 1);
4685 symtab_hdr->sh_info = elf_num_locals (abfd) + 1;
4686 symtab_hdr->sh_addralign = bed->s->file_align;
4688 symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr;
4689 symstrtab_hdr->sh_type = SHT_STRTAB;
4691 amt = (bfd_size_type) (1 + symcount) * bed->s->sizeof_sym;
4692 outbound_syms = bfd_alloc (abfd, amt);
4693 if (outbound_syms == NULL)
4695 symtab_hdr->contents = (PTR) outbound_syms;
4697 /* now generate the data (for "contents") */
4699 /* Fill in zeroth symbol and swap it out. */
4700 Elf_Internal_Sym sym;
4706 sym.st_shndx = SHN_UNDEF;
4707 bed->s->swap_symbol_out (abfd, &sym, (PTR) outbound_syms);
4708 outbound_syms += bed->s->sizeof_sym;
4711 syms = bfd_get_outsymbols (abfd);
4712 for (idx = 0; idx < symcount; idx++)
4714 Elf_Internal_Sym sym;
4715 bfd_vma value = syms[idx]->value;
4716 elf_symbol_type *type_ptr;
4717 flagword flags = syms[idx]->flags;
4720 if ((flags & (BSF_SECTION_SYM | BSF_GLOBAL)) == BSF_SECTION_SYM)
4722 /* Local section symbols have no name. */
4727 sym.st_name = (unsigned long) _bfd_stringtab_add (stt,
4730 if (sym.st_name == (unsigned long) -1)
4734 type_ptr = elf_symbol_from (abfd, syms[idx]);
4736 if ((flags & BSF_SECTION_SYM) == 0
4737 && bfd_is_com_section (syms[idx]->section))
4739 /* ELF common symbols put the alignment into the `value' field,
4740 and the size into the `size' field. This is backwards from
4741 how BFD handles it, so reverse it here. */
4742 sym.st_size = value;
4743 if (type_ptr == NULL
4744 || type_ptr->internal_elf_sym.st_value == 0)
4745 sym.st_value = value >= 16 ? 16 : (1 << bfd_log2 (value));
4747 sym.st_value = type_ptr->internal_elf_sym.st_value;
4748 sym.st_shndx = _bfd_elf_section_from_bfd_section
4749 (abfd, syms[idx]->section);
4753 asection *sec = syms[idx]->section;
4756 if (sec->output_section)
4758 value += sec->output_offset;
4759 sec = sec->output_section;
4761 /* Don't add in the section vma for relocatable output. */
4762 if (! relocatable_p)
4764 sym.st_value = value;
4765 sym.st_size = type_ptr ? type_ptr->internal_elf_sym.st_size : 0;
4767 if (bfd_is_abs_section (sec)
4769 && type_ptr->internal_elf_sym.st_shndx != 0)
4771 /* This symbol is in a real ELF section which we did
4772 not create as a BFD section. Undo the mapping done
4773 by copy_private_symbol_data. */
4774 shndx = type_ptr->internal_elf_sym.st_shndx;
4778 shndx = elf_onesymtab (abfd);
4781 shndx = elf_dynsymtab (abfd);
4784 shndx = elf_tdata (abfd)->strtab_section;
4787 shndx = elf_tdata (abfd)->shstrtab_section;
4795 shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
4801 /* Writing this would be a hell of a lot easier if
4802 we had some decent documentation on bfd, and
4803 knew what to expect of the library, and what to
4804 demand of applications. For example, it
4805 appears that `objcopy' might not set the
4806 section of a symbol to be a section that is
4807 actually in the output file. */
4808 sec2 = bfd_get_section_by_name (abfd, sec->name);
4809 BFD_ASSERT (sec2 != 0);
4810 shndx = _bfd_elf_section_from_bfd_section (abfd, sec2);
4811 BFD_ASSERT (shndx != -1);
4815 sym.st_shndx = shndx;
4818 if ((flags & BSF_FUNCTION) != 0)
4820 else if ((flags & BSF_OBJECT) != 0)
4825 /* Processor-specific types */
4826 if (type_ptr != NULL
4827 && bed->elf_backend_get_symbol_type)
4828 type = ((*bed->elf_backend_get_symbol_type)
4829 (&type_ptr->internal_elf_sym, type));
4831 if (flags & BSF_SECTION_SYM)
4833 if (flags & BSF_GLOBAL)
4834 sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION);
4836 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
4838 else if (bfd_is_com_section (syms[idx]->section))
4839 sym.st_info = ELF_ST_INFO (STB_GLOBAL, type);
4840 else if (bfd_is_und_section (syms[idx]->section))
4841 sym.st_info = ELF_ST_INFO (((flags & BSF_WEAK)
4845 else if (flags & BSF_FILE)
4846 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE);
4849 int bind = STB_LOCAL;
4851 if (flags & BSF_LOCAL)
4853 else if (flags & BSF_WEAK)
4855 else if (flags & BSF_GLOBAL)
4858 sym.st_info = ELF_ST_INFO (bind, type);
4861 if (type_ptr != NULL)
4862 sym.st_other = type_ptr->internal_elf_sym.st_other;
4866 bed->s->swap_symbol_out (abfd, &sym, (PTR) outbound_syms);
4867 outbound_syms += bed->s->sizeof_sym;
4871 symstrtab_hdr->sh_size = _bfd_stringtab_size (stt);
4872 symstrtab_hdr->sh_type = SHT_STRTAB;
4874 symstrtab_hdr->sh_flags = 0;
4875 symstrtab_hdr->sh_addr = 0;
4876 symstrtab_hdr->sh_entsize = 0;
4877 symstrtab_hdr->sh_link = 0;
4878 symstrtab_hdr->sh_info = 0;
4879 symstrtab_hdr->sh_addralign = 1;
4884 /* Return the number of bytes required to hold the symtab vector.
4886 Note that we base it on the count plus 1, since we will null terminate
4887 the vector allocated based on this size. However, the ELF symbol table
4888 always has a dummy entry as symbol #0, so it ends up even. */
4891 _bfd_elf_get_symtab_upper_bound (abfd)
4896 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->symtab_hdr;
4898 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
4899 symtab_size = (symcount - 1 + 1) * (sizeof (asymbol *));
4905 _bfd_elf_get_dynamic_symtab_upper_bound (abfd)
4910 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->dynsymtab_hdr;
4912 if (elf_dynsymtab (abfd) == 0)
4914 bfd_set_error (bfd_error_invalid_operation);
4918 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
4919 symtab_size = (symcount - 1 + 1) * (sizeof (asymbol *));
4925 _bfd_elf_get_reloc_upper_bound (abfd, asect)
4926 bfd *abfd ATTRIBUTE_UNUSED;
4929 return (asect->reloc_count + 1) * sizeof (arelent *);
4932 /* Canonicalize the relocs. */
4935 _bfd_elf_canonicalize_reloc (abfd, section, relptr, symbols)
4943 struct elf_backend_data *bed = get_elf_backend_data (abfd);
4945 if (! bed->s->slurp_reloc_table (abfd, section, symbols, false))
4948 tblptr = section->relocation;
4949 for (i = 0; i < section->reloc_count; i++)
4950 *relptr++ = tblptr++;
4954 return section->reloc_count;
4958 _bfd_elf_get_symtab (abfd, alocation)
4960 asymbol **alocation;
4962 struct elf_backend_data *bed = get_elf_backend_data (abfd);
4963 long symcount = bed->s->slurp_symbol_table (abfd, alocation, false);
4966 bfd_get_symcount (abfd) = symcount;
4971 _bfd_elf_canonicalize_dynamic_symtab (abfd, alocation)
4973 asymbol **alocation;
4975 struct elf_backend_data *bed = get_elf_backend_data (abfd);
4976 return bed->s->slurp_symbol_table (abfd, alocation, true);
4979 /* Return the size required for the dynamic reloc entries. Any
4980 section that was actually installed in the BFD, and has type
4981 SHT_REL or SHT_RELA, and uses the dynamic symbol table, is
4982 considered to be a dynamic reloc section. */
4985 _bfd_elf_get_dynamic_reloc_upper_bound (abfd)
4991 if (elf_dynsymtab (abfd) == 0)
4993 bfd_set_error (bfd_error_invalid_operation);
4997 ret = sizeof (arelent *);
4998 for (s = abfd->sections; s != NULL; s = s->next)
4999 if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
5000 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
5001 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
5002 ret += ((s->_raw_size / elf_section_data (s)->this_hdr.sh_entsize)
5003 * sizeof (arelent *));
5008 /* Canonicalize the dynamic relocation entries. Note that we return
5009 the dynamic relocations as a single block, although they are
5010 actually associated with particular sections; the interface, which
5011 was designed for SunOS style shared libraries, expects that there
5012 is only one set of dynamic relocs. Any section that was actually
5013 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses
5014 the dynamic symbol table, is considered to be a dynamic reloc
5018 _bfd_elf_canonicalize_dynamic_reloc (abfd, storage, syms)
5023 boolean (*slurp_relocs) PARAMS ((bfd *, asection *, asymbol **, boolean));
5027 if (elf_dynsymtab (abfd) == 0)
5029 bfd_set_error (bfd_error_invalid_operation);
5033 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
5035 for (s = abfd->sections; s != NULL; s = s->next)
5037 if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
5038 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
5039 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
5044 if (! (*slurp_relocs) (abfd, s, syms, true))
5046 count = s->_raw_size / elf_section_data (s)->this_hdr.sh_entsize;
5048 for (i = 0; i < count; i++)
5059 /* Read in the version information. */
5062 _bfd_elf_slurp_version_tables (abfd)
5065 bfd_byte *contents = NULL;
5068 if (elf_dynverdef (abfd) != 0)
5070 Elf_Internal_Shdr *hdr;
5071 Elf_External_Verdef *everdef;
5072 Elf_Internal_Verdef *iverdef;
5073 Elf_Internal_Verdef *iverdefarr;
5074 Elf_Internal_Verdef iverdefmem;
5076 unsigned int maxidx;
5078 hdr = &elf_tdata (abfd)->dynverdef_hdr;
5080 contents = (bfd_byte *) bfd_malloc (hdr->sh_size);
5081 if (contents == NULL)
5083 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
5084 || bfd_bread ((PTR) contents, hdr->sh_size, abfd) != hdr->sh_size)
5087 /* We know the number of entries in the section but not the maximum
5088 index. Therefore we have to run through all entries and find
5090 everdef = (Elf_External_Verdef *) contents;
5092 for (i = 0; i < hdr->sh_info; ++i)
5094 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
5096 if ((iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION)) > maxidx)
5097 maxidx = iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION);
5099 everdef = ((Elf_External_Verdef *)
5100 ((bfd_byte *) everdef + iverdefmem.vd_next));
5103 amt = (bfd_size_type) maxidx * sizeof (Elf_Internal_Verdef);
5104 elf_tdata (abfd)->verdef = (Elf_Internal_Verdef *) bfd_zalloc (abfd, amt);
5105 if (elf_tdata (abfd)->verdef == NULL)
5108 elf_tdata (abfd)->cverdefs = maxidx;
5110 everdef = (Elf_External_Verdef *) contents;
5111 iverdefarr = elf_tdata (abfd)->verdef;
5112 for (i = 0; i < hdr->sh_info; i++)
5114 Elf_External_Verdaux *everdaux;
5115 Elf_Internal_Verdaux *iverdaux;
5118 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
5120 iverdef = &iverdefarr[(iverdefmem.vd_ndx & VERSYM_VERSION) - 1];
5121 memcpy (iverdef, &iverdefmem, sizeof (Elf_Internal_Verdef));
5123 iverdef->vd_bfd = abfd;
5125 amt = (bfd_size_type) iverdef->vd_cnt * sizeof (Elf_Internal_Verdaux);
5126 iverdef->vd_auxptr = (Elf_Internal_Verdaux *) bfd_alloc (abfd, amt);
5127 if (iverdef->vd_auxptr == NULL)
5130 everdaux = ((Elf_External_Verdaux *)
5131 ((bfd_byte *) everdef + iverdef->vd_aux));
5132 iverdaux = iverdef->vd_auxptr;
5133 for (j = 0; j < iverdef->vd_cnt; j++, iverdaux++)
5135 _bfd_elf_swap_verdaux_in (abfd, everdaux, iverdaux);
5137 iverdaux->vda_nodename =
5138 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
5139 iverdaux->vda_name);
5140 if (iverdaux->vda_nodename == NULL)
5143 if (j + 1 < iverdef->vd_cnt)
5144 iverdaux->vda_nextptr = iverdaux + 1;
5146 iverdaux->vda_nextptr = NULL;
5148 everdaux = ((Elf_External_Verdaux *)
5149 ((bfd_byte *) everdaux + iverdaux->vda_next));
5152 iverdef->vd_nodename = iverdef->vd_auxptr->vda_nodename;
5154 if (i + 1 < hdr->sh_info)
5155 iverdef->vd_nextdef = iverdef + 1;
5157 iverdef->vd_nextdef = NULL;
5159 everdef = ((Elf_External_Verdef *)
5160 ((bfd_byte *) everdef + iverdef->vd_next));
5167 if (elf_dynverref (abfd) != 0)
5169 Elf_Internal_Shdr *hdr;
5170 Elf_External_Verneed *everneed;
5171 Elf_Internal_Verneed *iverneed;
5174 hdr = &elf_tdata (abfd)->dynverref_hdr;
5176 amt = (bfd_size_type) hdr->sh_info * sizeof (Elf_Internal_Verneed);
5177 elf_tdata (abfd)->verref =
5178 (Elf_Internal_Verneed *) bfd_zalloc (abfd, amt);
5179 if (elf_tdata (abfd)->verref == NULL)
5182 elf_tdata (abfd)->cverrefs = hdr->sh_info;
5184 contents = (bfd_byte *) bfd_malloc (hdr->sh_size);
5185 if (contents == NULL)
5187 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
5188 || bfd_bread ((PTR) contents, hdr->sh_size, abfd) != hdr->sh_size)
5191 everneed = (Elf_External_Verneed *) contents;
5192 iverneed = elf_tdata (abfd)->verref;
5193 for (i = 0; i < hdr->sh_info; i++, iverneed++)
5195 Elf_External_Vernaux *evernaux;
5196 Elf_Internal_Vernaux *ivernaux;
5199 _bfd_elf_swap_verneed_in (abfd, everneed, iverneed);
5201 iverneed->vn_bfd = abfd;
5203 iverneed->vn_filename =
5204 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
5206 if (iverneed->vn_filename == NULL)
5209 amt = iverneed->vn_cnt;
5210 amt *= sizeof (Elf_Internal_Vernaux);
5211 iverneed->vn_auxptr = (Elf_Internal_Vernaux *) bfd_alloc (abfd, amt);
5213 evernaux = ((Elf_External_Vernaux *)
5214 ((bfd_byte *) everneed + iverneed->vn_aux));
5215 ivernaux = iverneed->vn_auxptr;
5216 for (j = 0; j < iverneed->vn_cnt; j++, ivernaux++)
5218 _bfd_elf_swap_vernaux_in (abfd, evernaux, ivernaux);
5220 ivernaux->vna_nodename =
5221 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
5222 ivernaux->vna_name);
5223 if (ivernaux->vna_nodename == NULL)
5226 if (j + 1 < iverneed->vn_cnt)
5227 ivernaux->vna_nextptr = ivernaux + 1;
5229 ivernaux->vna_nextptr = NULL;
5231 evernaux = ((Elf_External_Vernaux *)
5232 ((bfd_byte *) evernaux + ivernaux->vna_next));
5235 if (i + 1 < hdr->sh_info)
5236 iverneed->vn_nextref = iverneed + 1;
5238 iverneed->vn_nextref = NULL;
5240 everneed = ((Elf_External_Verneed *)
5241 ((bfd_byte *) everneed + iverneed->vn_next));
5251 if (contents == NULL)
5257 _bfd_elf_make_empty_symbol (abfd)
5260 elf_symbol_type *newsym;
5261 bfd_size_type amt = sizeof (elf_symbol_type);
5263 newsym = (elf_symbol_type *) bfd_zalloc (abfd, amt);
5268 newsym->symbol.the_bfd = abfd;
5269 return &newsym->symbol;
5274 _bfd_elf_get_symbol_info (ignore_abfd, symbol, ret)
5275 bfd *ignore_abfd ATTRIBUTE_UNUSED;
5279 bfd_symbol_info (symbol, ret);
5282 /* Return whether a symbol name implies a local symbol. Most targets
5283 use this function for the is_local_label_name entry point, but some
5287 _bfd_elf_is_local_label_name (abfd, name)
5288 bfd *abfd ATTRIBUTE_UNUSED;
5291 /* Normal local symbols start with ``.L''. */
5292 if (name[0] == '.' && name[1] == 'L')
5295 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
5296 DWARF debugging symbols starting with ``..''. */
5297 if (name[0] == '.' && name[1] == '.')
5300 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
5301 emitting DWARF debugging output. I suspect this is actually a
5302 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
5303 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
5304 underscore to be emitted on some ELF targets). For ease of use,
5305 we treat such symbols as local. */
5306 if (name[0] == '_' && name[1] == '.' && name[2] == 'L' && name[3] == '_')
5313 _bfd_elf_get_lineno (ignore_abfd, symbol)
5314 bfd *ignore_abfd ATTRIBUTE_UNUSED;
5315 asymbol *symbol ATTRIBUTE_UNUSED;
5322 _bfd_elf_set_arch_mach (abfd, arch, machine)
5324 enum bfd_architecture arch;
5325 unsigned long machine;
5327 /* If this isn't the right architecture for this backend, and this
5328 isn't the generic backend, fail. */
5329 if (arch != get_elf_backend_data (abfd)->arch
5330 && arch != bfd_arch_unknown
5331 && get_elf_backend_data (abfd)->arch != bfd_arch_unknown)
5334 return bfd_default_set_arch_mach (abfd, arch, machine);
5337 /* Find the function to a particular section and offset,
5338 for error reporting. */
5341 elf_find_function (abfd, section, symbols, offset,
5342 filename_ptr, functionname_ptr)
5343 bfd *abfd ATTRIBUTE_UNUSED;
5347 const char **filename_ptr;
5348 const char **functionname_ptr;
5350 const char *filename;
5359 for (p = symbols; *p != NULL; p++)
5363 q = (elf_symbol_type *) *p;
5365 if (bfd_get_section (&q->symbol) != section)
5368 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
5373 filename = bfd_asymbol_name (&q->symbol);
5377 if (q->symbol.section == section
5378 && q->symbol.value >= low_func
5379 && q->symbol.value <= offset)
5381 func = (asymbol *) q;
5382 low_func = q->symbol.value;
5392 *filename_ptr = filename;
5393 if (functionname_ptr)
5394 *functionname_ptr = bfd_asymbol_name (func);
5399 /* Find the nearest line to a particular section and offset,
5400 for error reporting. */
5403 _bfd_elf_find_nearest_line (abfd, section, symbols, offset,
5404 filename_ptr, functionname_ptr, line_ptr)
5409 const char **filename_ptr;
5410 const char **functionname_ptr;
5411 unsigned int *line_ptr;
5415 if (_bfd_dwarf1_find_nearest_line (abfd, section, symbols, offset,
5416 filename_ptr, functionname_ptr,
5419 if (!*functionname_ptr)
5420 elf_find_function (abfd, section, symbols, offset,
5421 *filename_ptr ? NULL : filename_ptr,
5427 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
5428 filename_ptr, functionname_ptr,
5430 &elf_tdata (abfd)->dwarf2_find_line_info))
5432 if (!*functionname_ptr)
5433 elf_find_function (abfd, section, symbols, offset,
5434 *filename_ptr ? NULL : filename_ptr,
5440 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
5441 &found, filename_ptr,
5442 functionname_ptr, line_ptr,
5443 &elf_tdata (abfd)->line_info))
5448 if (symbols == NULL)
5451 if (! elf_find_function (abfd, section, symbols, offset,
5452 filename_ptr, functionname_ptr))
5460 _bfd_elf_sizeof_headers (abfd, reloc)
5466 ret = get_elf_backend_data (abfd)->s->sizeof_ehdr;
5468 ret += get_program_header_size (abfd);
5473 _bfd_elf_set_section_contents (abfd, section, location, offset, count)
5478 bfd_size_type count;
5480 Elf_Internal_Shdr *hdr;
5483 if (! abfd->output_has_begun
5484 && ! _bfd_elf_compute_section_file_positions
5485 (abfd, (struct bfd_link_info *) NULL))
5488 hdr = &elf_section_data (section)->this_hdr;
5489 pos = hdr->sh_offset + offset;
5490 if (bfd_seek (abfd, pos, SEEK_SET) != 0
5491 || bfd_bwrite (location, count, abfd) != count)
5498 _bfd_elf_no_info_to_howto (abfd, cache_ptr, dst)
5499 bfd *abfd ATTRIBUTE_UNUSED;
5500 arelent *cache_ptr ATTRIBUTE_UNUSED;
5501 Elf_Internal_Rela *dst ATTRIBUTE_UNUSED;
5508 _bfd_elf_no_info_to_howto_rel (abfd, cache_ptr, dst)
5511 Elf_Internal_Rel *dst;
5517 /* Try to convert a non-ELF reloc into an ELF one. */
5520 _bfd_elf_validate_reloc (abfd, areloc)
5524 /* Check whether we really have an ELF howto. */
5526 if ((*areloc->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec)
5528 bfd_reloc_code_real_type code;
5529 reloc_howto_type *howto;
5531 /* Alien reloc: Try to determine its type to replace it with an
5532 equivalent ELF reloc. */
5534 if (areloc->howto->pc_relative)
5536 switch (areloc->howto->bitsize)
5539 code = BFD_RELOC_8_PCREL;
5542 code = BFD_RELOC_12_PCREL;
5545 code = BFD_RELOC_16_PCREL;
5548 code = BFD_RELOC_24_PCREL;
5551 code = BFD_RELOC_32_PCREL;
5554 code = BFD_RELOC_64_PCREL;
5560 howto = bfd_reloc_type_lookup (abfd, code);
5562 if (areloc->howto->pcrel_offset != howto->pcrel_offset)
5564 if (howto->pcrel_offset)
5565 areloc->addend += areloc->address;
5567 areloc->addend -= areloc->address; /* addend is unsigned!! */
5572 switch (areloc->howto->bitsize)
5578 code = BFD_RELOC_14;
5581 code = BFD_RELOC_16;
5584 code = BFD_RELOC_26;
5587 code = BFD_RELOC_32;
5590 code = BFD_RELOC_64;
5596 howto = bfd_reloc_type_lookup (abfd, code);
5600 areloc->howto = howto;
5608 (*_bfd_error_handler)
5609 (_("%s: unsupported relocation type %s"),
5610 bfd_archive_filename (abfd), areloc->howto->name);
5611 bfd_set_error (bfd_error_bad_value);
5616 _bfd_elf_close_and_cleanup (abfd)
5619 if (bfd_get_format (abfd) == bfd_object)
5621 if (elf_shstrtab (abfd) != NULL)
5622 _bfd_elf_strtab_free (elf_shstrtab (abfd));
5625 return _bfd_generic_close_and_cleanup (abfd);
5628 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
5629 in the relocation's offset. Thus we cannot allow any sort of sanity
5630 range-checking to interfere. There is nothing else to do in processing
5633 bfd_reloc_status_type
5634 _bfd_elf_rel_vtable_reloc_fn (abfd, re, symbol, data, is, obfd, errmsg)
5635 bfd *abfd ATTRIBUTE_UNUSED;
5636 arelent *re ATTRIBUTE_UNUSED;
5637 struct symbol_cache_entry *symbol ATTRIBUTE_UNUSED;
5638 PTR data ATTRIBUTE_UNUSED;
5639 asection *is ATTRIBUTE_UNUSED;
5640 bfd *obfd ATTRIBUTE_UNUSED;
5641 char **errmsg ATTRIBUTE_UNUSED;
5643 return bfd_reloc_ok;
5646 /* Elf core file support. Much of this only works on native
5647 toolchains, since we rely on knowing the
5648 machine-dependent procfs structure in order to pick
5649 out details about the corefile. */
5651 #ifdef HAVE_SYS_PROCFS_H
5652 # include <sys/procfs.h>
5655 /* FIXME: this is kinda wrong, but it's what gdb wants. */
5658 elfcore_make_pid (abfd)
5661 return ((elf_tdata (abfd)->core_lwpid << 16)
5662 + (elf_tdata (abfd)->core_pid));
5665 /* If there isn't a section called NAME, make one, using
5666 data from SECT. Note, this function will generate a
5667 reference to NAME, so you shouldn't deallocate or
5671 elfcore_maybe_make_sect (abfd, name, sect)
5678 if (bfd_get_section_by_name (abfd, name) != NULL)
5681 sect2 = bfd_make_section (abfd, name);
5685 sect2->_raw_size = sect->_raw_size;
5686 sect2->filepos = sect->filepos;
5687 sect2->flags = sect->flags;
5688 sect2->alignment_power = sect->alignment_power;
5692 /* Create a pseudosection containing SIZE bytes at FILEPOS. This
5693 actually creates up to two pseudosections:
5694 - For the single-threaded case, a section named NAME, unless
5695 such a section already exists.
5696 - For the multi-threaded case, a section named "NAME/PID", where
5697 PID is elfcore_make_pid (abfd).
5698 Both pseudosections have identical contents. */
5700 _bfd_elfcore_make_pseudosection (abfd, name, size, filepos)
5707 char *threaded_name;
5710 /* Build the section name. */
5712 sprintf (buf, "%s/%d", name, elfcore_make_pid (abfd));
5713 threaded_name = bfd_alloc (abfd, (bfd_size_type) strlen (buf) + 1);
5714 if (threaded_name == NULL)
5716 strcpy (threaded_name, buf);
5718 sect = bfd_make_section (abfd, threaded_name);
5721 sect->_raw_size = size;
5722 sect->filepos = filepos;
5723 sect->flags = SEC_HAS_CONTENTS;
5724 sect->alignment_power = 2;
5726 return elfcore_maybe_make_sect (abfd, name, sect);
5729 /* prstatus_t exists on:
5731 linux 2.[01] + glibc
5735 #if defined (HAVE_PRSTATUS_T)
5736 static boolean elfcore_grok_prstatus PARAMS ((bfd *, Elf_Internal_Note *));
5739 elfcore_grok_prstatus (abfd, note)
5741 Elf_Internal_Note *note;
5746 if (note->descsz == sizeof (prstatus_t))
5750 raw_size = sizeof (prstat.pr_reg);
5751 offset = offsetof (prstatus_t, pr_reg);
5752 memcpy (&prstat, note->descdata, sizeof (prstat));
5754 /* Do not overwrite the core signal if it
5755 has already been set by another thread. */
5756 if (elf_tdata (abfd)->core_signal == 0)
5757 elf_tdata (abfd)->core_signal = prstat.pr_cursig;
5758 elf_tdata (abfd)->core_pid = prstat.pr_pid;
5760 /* pr_who exists on:
5763 pr_who doesn't exist on:
5766 #if defined (HAVE_PRSTATUS_T_PR_WHO)
5767 elf_tdata (abfd)->core_lwpid = prstat.pr_who;
5770 #if defined (HAVE_PRSTATUS32_T)
5771 else if (note->descsz == sizeof (prstatus32_t))
5773 /* 64-bit host, 32-bit corefile */
5774 prstatus32_t prstat;
5776 raw_size = sizeof (prstat.pr_reg);
5777 offset = offsetof (prstatus32_t, pr_reg);
5778 memcpy (&prstat, note->descdata, sizeof (prstat));
5780 /* Do not overwrite the core signal if it
5781 has already been set by another thread. */
5782 if (elf_tdata (abfd)->core_signal == 0)
5783 elf_tdata (abfd)->core_signal = prstat.pr_cursig;
5784 elf_tdata (abfd)->core_pid = prstat.pr_pid;
5786 /* pr_who exists on:
5789 pr_who doesn't exist on:
5792 #if defined (HAVE_PRSTATUS32_T_PR_WHO)
5793 elf_tdata (abfd)->core_lwpid = prstat.pr_who;
5796 #endif /* HAVE_PRSTATUS32_T */
5799 /* Fail - we don't know how to handle any other
5800 note size (ie. data object type). */
5804 /* Make a ".reg/999" section and a ".reg" section. */
5805 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
5806 raw_size, note->descpos + offset);
5808 #endif /* defined (HAVE_PRSTATUS_T) */
5810 /* Create a pseudosection containing the exact contents of NOTE. */
5812 elfcore_make_note_pseudosection (abfd, name, note)
5815 Elf_Internal_Note *note;
5817 return _bfd_elfcore_make_pseudosection (abfd, name,
5818 note->descsz, note->descpos);
5821 /* There isn't a consistent prfpregset_t across platforms,
5822 but it doesn't matter, because we don't have to pick this
5823 data structure apart. */
5826 elfcore_grok_prfpreg (abfd, note)
5828 Elf_Internal_Note *note;
5830 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
5833 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
5834 type of 5 (NT_PRXFPREG). Just include the whole note's contents
5838 elfcore_grok_prxfpreg (abfd, note)
5840 Elf_Internal_Note *note;
5842 return elfcore_make_note_pseudosection (abfd, ".reg-xfp", note);
5845 #if defined (HAVE_PRPSINFO_T)
5846 typedef prpsinfo_t elfcore_psinfo_t;
5847 #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
5848 typedef prpsinfo32_t elfcore_psinfo32_t;
5852 #if defined (HAVE_PSINFO_T)
5853 typedef psinfo_t elfcore_psinfo_t;
5854 #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
5855 typedef psinfo32_t elfcore_psinfo32_t;
5859 /* return a malloc'ed copy of a string at START which is at
5860 most MAX bytes long, possibly without a terminating '\0'.
5861 the copy will always have a terminating '\0'. */
5864 _bfd_elfcore_strndup (abfd, start, max)
5870 char *end = memchr (start, '\0', max);
5878 dups = bfd_alloc (abfd, (bfd_size_type) len + 1);
5882 memcpy (dups, start, len);
5888 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
5889 static boolean elfcore_grok_psinfo PARAMS ((bfd *, Elf_Internal_Note *));
5892 elfcore_grok_psinfo (abfd, note)
5894 Elf_Internal_Note *note;
5896 if (note->descsz == sizeof (elfcore_psinfo_t))
5898 elfcore_psinfo_t psinfo;
5900 memcpy (&psinfo, note->descdata, sizeof (psinfo));
5902 elf_tdata (abfd)->core_program
5903 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
5904 sizeof (psinfo.pr_fname));
5906 elf_tdata (abfd)->core_command
5907 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
5908 sizeof (psinfo.pr_psargs));
5910 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
5911 else if (note->descsz == sizeof (elfcore_psinfo32_t))
5913 /* 64-bit host, 32-bit corefile */
5914 elfcore_psinfo32_t psinfo;
5916 memcpy (&psinfo, note->descdata, sizeof (psinfo));
5918 elf_tdata (abfd)->core_program
5919 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
5920 sizeof (psinfo.pr_fname));
5922 elf_tdata (abfd)->core_command
5923 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
5924 sizeof (psinfo.pr_psargs));
5930 /* Fail - we don't know how to handle any other
5931 note size (ie. data object type). */
5935 /* Note that for some reason, a spurious space is tacked
5936 onto the end of the args in some (at least one anyway)
5937 implementations, so strip it off if it exists. */
5940 char *command = elf_tdata (abfd)->core_command;
5941 int n = strlen (command);
5943 if (0 < n && command[n - 1] == ' ')
5944 command[n - 1] = '\0';
5949 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
5951 #if defined (HAVE_PSTATUS_T)
5953 elfcore_grok_pstatus (abfd, note)
5955 Elf_Internal_Note *note;
5957 if (note->descsz == sizeof (pstatus_t)
5958 #if defined (HAVE_PXSTATUS_T)
5959 || note->descsz == sizeof (pxstatus_t)
5965 memcpy (&pstat, note->descdata, sizeof (pstat));
5967 elf_tdata (abfd)->core_pid = pstat.pr_pid;
5969 #if defined (HAVE_PSTATUS32_T)
5970 else if (note->descsz == sizeof (pstatus32_t))
5972 /* 64-bit host, 32-bit corefile */
5975 memcpy (&pstat, note->descdata, sizeof (pstat));
5977 elf_tdata (abfd)->core_pid = pstat.pr_pid;
5980 /* Could grab some more details from the "representative"
5981 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
5982 NT_LWPSTATUS note, presumably. */
5986 #endif /* defined (HAVE_PSTATUS_T) */
5988 #if defined (HAVE_LWPSTATUS_T)
5990 elfcore_grok_lwpstatus (abfd, note)
5992 Elf_Internal_Note *note;
5994 lwpstatus_t lwpstat;
5999 if (note->descsz != sizeof (lwpstat)
6000 #if defined (HAVE_LWPXSTATUS_T)
6001 && note->descsz != sizeof (lwpxstatus_t)
6006 memcpy (&lwpstat, note->descdata, sizeof (lwpstat));
6008 elf_tdata (abfd)->core_lwpid = lwpstat.pr_lwpid;
6009 elf_tdata (abfd)->core_signal = lwpstat.pr_cursig;
6011 /* Make a ".reg/999" section. */
6013 sprintf (buf, ".reg/%d", elfcore_make_pid (abfd));
6014 name = bfd_alloc (abfd, (bfd_size_type) strlen (buf) + 1);
6019 sect = bfd_make_section (abfd, name);
6023 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
6024 sect->_raw_size = sizeof (lwpstat.pr_context.uc_mcontext.gregs);
6025 sect->filepos = note->descpos
6026 + offsetof (lwpstatus_t, pr_context.uc_mcontext.gregs);
6029 #if defined (HAVE_LWPSTATUS_T_PR_REG)
6030 sect->_raw_size = sizeof (lwpstat.pr_reg);
6031 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_reg);
6034 sect->flags = SEC_HAS_CONTENTS;
6035 sect->alignment_power = 2;
6037 if (!elfcore_maybe_make_sect (abfd, ".reg", sect))
6040 /* Make a ".reg2/999" section */
6042 sprintf (buf, ".reg2/%d", elfcore_make_pid (abfd));
6043 name = bfd_alloc (abfd, (bfd_size_type) strlen (buf) + 1);
6048 sect = bfd_make_section (abfd, name);
6052 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
6053 sect->_raw_size = sizeof (lwpstat.pr_context.uc_mcontext.fpregs);
6054 sect->filepos = note->descpos
6055 + offsetof (lwpstatus_t, pr_context.uc_mcontext.fpregs);
6058 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
6059 sect->_raw_size = sizeof (lwpstat.pr_fpreg);
6060 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_fpreg);
6063 sect->flags = SEC_HAS_CONTENTS;
6064 sect->alignment_power = 2;
6066 return elfcore_maybe_make_sect (abfd, ".reg2", sect);
6068 #endif /* defined (HAVE_LWPSTATUS_T) */
6070 #if defined (HAVE_WIN32_PSTATUS_T)
6072 elfcore_grok_win32pstatus (abfd, note)
6074 Elf_Internal_Note *note;
6079 win32_pstatus_t pstatus;
6081 if (note->descsz < sizeof (pstatus))
6084 memcpy (&pstatus, note->descdata, note->descsz);
6086 switch (pstatus.data_type)
6088 case NOTE_INFO_PROCESS:
6089 /* FIXME: need to add ->core_command. */
6090 elf_tdata (abfd)->core_signal = pstatus.data.process_info.signal;
6091 elf_tdata (abfd)->core_pid = pstatus.data.process_info.pid;
6094 case NOTE_INFO_THREAD:
6095 /* Make a ".reg/999" section. */
6096 sprintf (buf, ".reg/%d", pstatus.data.thread_info.tid);
6098 name = bfd_alloc (abfd, (bfd_size_type) strlen (buf) + 1);
6104 sect = bfd_make_section (abfd, name);
6108 sect->_raw_size = sizeof (pstatus.data.thread_info.thread_context);
6109 sect->filepos = (note->descpos
6110 + offsetof (struct win32_pstatus,
6111 data.thread_info.thread_context));
6112 sect->flags = SEC_HAS_CONTENTS;
6113 sect->alignment_power = 2;
6115 if (pstatus.data.thread_info.is_active_thread)
6116 if (! elfcore_maybe_make_sect (abfd, ".reg", sect))
6120 case NOTE_INFO_MODULE:
6121 /* Make a ".module/xxxxxxxx" section. */
6122 sprintf (buf, ".module/%08x", pstatus.data.module_info.base_address);
6124 name = bfd_alloc (abfd, (bfd_size_type) strlen (buf) + 1);
6130 sect = bfd_make_section (abfd, name);
6135 sect->_raw_size = note->descsz;
6136 sect->filepos = note->descpos;
6137 sect->flags = SEC_HAS_CONTENTS;
6138 sect->alignment_power = 2;
6147 #endif /* HAVE_WIN32_PSTATUS_T */
6150 elfcore_grok_note (abfd, note)
6152 Elf_Internal_Note *note;
6154 struct elf_backend_data *bed = get_elf_backend_data (abfd);
6162 if (bed->elf_backend_grok_prstatus)
6163 if ((*bed->elf_backend_grok_prstatus) (abfd, note))
6165 #if defined (HAVE_PRSTATUS_T)
6166 return elfcore_grok_prstatus (abfd, note);
6171 #if defined (HAVE_PSTATUS_T)
6173 return elfcore_grok_pstatus (abfd, note);
6176 #if defined (HAVE_LWPSTATUS_T)
6178 return elfcore_grok_lwpstatus (abfd, note);
6181 case NT_FPREGSET: /* FIXME: rename to NT_PRFPREG */
6182 return elfcore_grok_prfpreg (abfd, note);
6184 #if defined (HAVE_WIN32_PSTATUS_T)
6185 case NT_WIN32PSTATUS:
6186 return elfcore_grok_win32pstatus (abfd, note);
6189 case NT_PRXFPREG: /* Linux SSE extension */
6190 if (note->namesz == 5
6191 && ! strcmp (note->namedata, "LINUX"))
6192 return elfcore_grok_prxfpreg (abfd, note);
6198 if (bed->elf_backend_grok_psinfo)
6199 if ((*bed->elf_backend_grok_psinfo) (abfd, note))
6201 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
6202 return elfcore_grok_psinfo (abfd, note);
6210 elfcore_read_notes (abfd, offset, size)
6221 if (bfd_seek (abfd, offset, SEEK_SET) != 0)
6224 buf = bfd_malloc (size);
6228 if (bfd_bread (buf, size, abfd) != size)
6236 while (p < buf + size)
6238 /* FIXME: bad alignment assumption. */
6239 Elf_External_Note *xnp = (Elf_External_Note *) p;
6240 Elf_Internal_Note in;
6242 in.type = H_GET_32 (abfd, xnp->type);
6244 in.namesz = H_GET_32 (abfd, xnp->namesz);
6245 in.namedata = xnp->name;
6247 in.descsz = H_GET_32 (abfd, xnp->descsz);
6248 in.descdata = in.namedata + BFD_ALIGN (in.namesz, 4);
6249 in.descpos = offset + (in.descdata - buf);
6251 if (! elfcore_grok_note (abfd, &in))
6254 p = in.descdata + BFD_ALIGN (in.descsz, 4);
6261 /* Providing external access to the ELF program header table. */
6263 /* Return an upper bound on the number of bytes required to store a
6264 copy of ABFD's program header table entries. Return -1 if an error
6265 occurs; bfd_get_error will return an appropriate code. */
6268 bfd_get_elf_phdr_upper_bound (abfd)
6271 if (abfd->xvec->flavour != bfd_target_elf_flavour)
6273 bfd_set_error (bfd_error_wrong_format);
6277 return elf_elfheader (abfd)->e_phnum * sizeof (Elf_Internal_Phdr);
6280 /* Copy ABFD's program header table entries to *PHDRS. The entries
6281 will be stored as an array of Elf_Internal_Phdr structures, as
6282 defined in include/elf/internal.h. To find out how large the
6283 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
6285 Return the number of program header table entries read, or -1 if an
6286 error occurs; bfd_get_error will return an appropriate code. */
6289 bfd_get_elf_phdrs (abfd, phdrs)
6295 if (abfd->xvec->flavour != bfd_target_elf_flavour)
6297 bfd_set_error (bfd_error_wrong_format);
6301 num_phdrs = elf_elfheader (abfd)->e_phnum;
6302 memcpy (phdrs, elf_tdata (abfd)->phdr,
6303 num_phdrs * sizeof (Elf_Internal_Phdr));
6309 _bfd_elf_sprintf_vma (abfd, buf, value)
6310 bfd *abfd ATTRIBUTE_UNUSED;
6315 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
6317 i_ehdrp = elf_elfheader (abfd);
6318 if (i_ehdrp == NULL)
6319 sprintf_vma (buf, value);
6322 if (i_ehdrp->e_ident[EI_CLASS] == ELFCLASS64)
6324 #if BFD_HOST_64BIT_LONG
6325 sprintf (buf, "%016lx", value);
6327 sprintf (buf, "%08lx%08lx", _bfd_int64_high (value),
6328 _bfd_int64_low (value));
6332 sprintf (buf, "%08lx", (unsigned long) (value & 0xffffffff));
6335 sprintf_vma (buf, value);
6340 _bfd_elf_fprintf_vma (abfd, stream, value)
6341 bfd *abfd ATTRIBUTE_UNUSED;
6346 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
6348 i_ehdrp = elf_elfheader (abfd);
6349 if (i_ehdrp == NULL)
6350 fprintf_vma ((FILE *) stream, value);
6353 if (i_ehdrp->e_ident[EI_CLASS] == ELFCLASS64)
6355 #if BFD_HOST_64BIT_LONG
6356 fprintf ((FILE *) stream, "%016lx", value);
6358 fprintf ((FILE *) stream, "%08lx%08lx",
6359 _bfd_int64_high (value), _bfd_int64_low (value));
6363 fprintf ((FILE *) stream, "%08lx",
6364 (unsigned long) (value & 0xffffffff));
6367 fprintf_vma ((FILE *) stream, value);
6371 enum elf_reloc_type_class
6372 _bfd_elf_reloc_type_class (rela)
6373 const Elf_Internal_Rela *rela ATTRIBUTE_UNUSED;
6375 return reloc_class_normal;
6378 /* For RELA architectures, return what the relocation value for
6379 relocation against a local symbol. */
6382 _bfd_elf_rela_local_sym (abfd, sym, sec, rel)
6384 Elf_Internal_Sym *sym;
6386 Elf_Internal_Rela *rel;
6390 relocation = (sec->output_section->vma
6391 + sec->output_offset
6393 if ((sec->flags & SEC_MERGE)
6394 && ELF_ST_TYPE (sym->st_info) == STT_SECTION
6395 && elf_section_data (sec)->merge_info)
6401 _bfd_merged_section_offset (abfd, &msec,
6402 elf_section_data (sec)->merge_info,
6403 sym->st_value + rel->r_addend,
6406 rel->r_addend += msec->output_section->vma + msec->output_offset;
6412 _bfd_elf_rel_local_sym (abfd, sym, psec, addend)
6414 Elf_Internal_Sym *sym;
6418 asection *sec = *psec;
6420 if (elf_section_data (sec)->merge_info == NULL)
6421 return sym->st_value + addend;
6423 return _bfd_merged_section_offset (abfd, psec,
6424 elf_section_data (sec)->merge_info,
6425 sym->st_value + addend, (bfd_vma) 0);
6429 _bfd_elf_section_offset (abfd, info, sec, offset)
6431 struct bfd_link_info *info;
6435 struct bfd_elf_section_data *sec_data;
6437 sec_data = elf_section_data (sec);
6438 if (sec_data->stab_info != NULL)
6439 return _bfd_stab_section_offset
6440 (abfd, &elf_hash_table (info)->stab_info,
6441 sec, &sec_data->stab_info, offset);