1 /* ELF executable support for BFD.
2 Copyright 1993, 94, 95, 96, 97, 98, 1999 Free Software Foundation, Inc.
4 This file is part of BFD, the Binary File Descriptor library.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
25 BFD support for ELF formats is being worked on.
26 Currently, the best supported back ends are for sparc and i386
27 (running svr4 or Solaris 2).
29 Documentation of the internals of the support code still needs
30 to be written. The code is changing quickly enough that we
41 static INLINE struct elf_segment_map *make_mapping
42 PARAMS ((bfd *, asection **, unsigned int, unsigned int, boolean));
43 static boolean map_sections_to_segments PARAMS ((bfd *));
44 static int elf_sort_sections PARAMS ((const PTR, const PTR));
45 static boolean assign_file_positions_for_segments PARAMS ((bfd *));
46 static boolean assign_file_positions_except_relocs PARAMS ((bfd *));
47 static boolean prep_headers PARAMS ((bfd *));
48 static boolean swap_out_syms PARAMS ((bfd *, struct bfd_strtab_hash **, int));
49 static boolean copy_private_bfd_data PARAMS ((bfd *, bfd *));
50 static char *elf_read PARAMS ((bfd *, long, unsigned int));
51 static void elf_fake_sections PARAMS ((bfd *, asection *, PTR));
52 static boolean assign_section_numbers PARAMS ((bfd *));
53 static INLINE int sym_is_global PARAMS ((bfd *, asymbol *));
54 static boolean elf_map_symbols PARAMS ((bfd *));
55 static bfd_size_type get_program_header_size PARAMS ((bfd *));
56 static boolean elfcore_read_notes PARAMS ((bfd *, bfd_vma, bfd_vma));
58 /* Swap version information in and out. The version information is
59 currently size independent. If that ever changes, this code will
60 need to move into elfcode.h. */
62 /* Swap in a Verdef structure. */
65 _bfd_elf_swap_verdef_in (abfd, src, dst)
67 const Elf_External_Verdef *src;
68 Elf_Internal_Verdef *dst;
70 dst->vd_version = bfd_h_get_16 (abfd, src->vd_version);
71 dst->vd_flags = bfd_h_get_16 (abfd, src->vd_flags);
72 dst->vd_ndx = bfd_h_get_16 (abfd, src->vd_ndx);
73 dst->vd_cnt = bfd_h_get_16 (abfd, src->vd_cnt);
74 dst->vd_hash = bfd_h_get_32 (abfd, src->vd_hash);
75 dst->vd_aux = bfd_h_get_32 (abfd, src->vd_aux);
76 dst->vd_next = bfd_h_get_32 (abfd, src->vd_next);
79 /* Swap out a Verdef structure. */
82 _bfd_elf_swap_verdef_out (abfd, src, dst)
84 const Elf_Internal_Verdef *src;
85 Elf_External_Verdef *dst;
87 bfd_h_put_16 (abfd, src->vd_version, dst->vd_version);
88 bfd_h_put_16 (abfd, src->vd_flags, dst->vd_flags);
89 bfd_h_put_16 (abfd, src->vd_ndx, dst->vd_ndx);
90 bfd_h_put_16 (abfd, src->vd_cnt, dst->vd_cnt);
91 bfd_h_put_32 (abfd, src->vd_hash, dst->vd_hash);
92 bfd_h_put_32 (abfd, src->vd_aux, dst->vd_aux);
93 bfd_h_put_32 (abfd, src->vd_next, dst->vd_next);
96 /* Swap in a Verdaux structure. */
99 _bfd_elf_swap_verdaux_in (abfd, src, dst)
101 const Elf_External_Verdaux *src;
102 Elf_Internal_Verdaux *dst;
104 dst->vda_name = bfd_h_get_32 (abfd, src->vda_name);
105 dst->vda_next = bfd_h_get_32 (abfd, src->vda_next);
108 /* Swap out a Verdaux structure. */
111 _bfd_elf_swap_verdaux_out (abfd, src, dst)
113 const Elf_Internal_Verdaux *src;
114 Elf_External_Verdaux *dst;
116 bfd_h_put_32 (abfd, src->vda_name, dst->vda_name);
117 bfd_h_put_32 (abfd, src->vda_next, dst->vda_next);
120 /* Swap in a Verneed structure. */
123 _bfd_elf_swap_verneed_in (abfd, src, dst)
125 const Elf_External_Verneed *src;
126 Elf_Internal_Verneed *dst;
128 dst->vn_version = bfd_h_get_16 (abfd, src->vn_version);
129 dst->vn_cnt = bfd_h_get_16 (abfd, src->vn_cnt);
130 dst->vn_file = bfd_h_get_32 (abfd, src->vn_file);
131 dst->vn_aux = bfd_h_get_32 (abfd, src->vn_aux);
132 dst->vn_next = bfd_h_get_32 (abfd, src->vn_next);
135 /* Swap out a Verneed structure. */
138 _bfd_elf_swap_verneed_out (abfd, src, dst)
140 const Elf_Internal_Verneed *src;
141 Elf_External_Verneed *dst;
143 bfd_h_put_16 (abfd, src->vn_version, dst->vn_version);
144 bfd_h_put_16 (abfd, src->vn_cnt, dst->vn_cnt);
145 bfd_h_put_32 (abfd, src->vn_file, dst->vn_file);
146 bfd_h_put_32 (abfd, src->vn_aux, dst->vn_aux);
147 bfd_h_put_32 (abfd, src->vn_next, dst->vn_next);
150 /* Swap in a Vernaux structure. */
153 _bfd_elf_swap_vernaux_in (abfd, src, dst)
155 const Elf_External_Vernaux *src;
156 Elf_Internal_Vernaux *dst;
158 dst->vna_hash = bfd_h_get_32 (abfd, src->vna_hash);
159 dst->vna_flags = bfd_h_get_16 (abfd, src->vna_flags);
160 dst->vna_other = bfd_h_get_16 (abfd, src->vna_other);
161 dst->vna_name = bfd_h_get_32 (abfd, src->vna_name);
162 dst->vna_next = bfd_h_get_32 (abfd, src->vna_next);
165 /* Swap out a Vernaux structure. */
168 _bfd_elf_swap_vernaux_out (abfd, src, dst)
170 const Elf_Internal_Vernaux *src;
171 Elf_External_Vernaux *dst;
173 bfd_h_put_32 (abfd, src->vna_hash, dst->vna_hash);
174 bfd_h_put_16 (abfd, src->vna_flags, dst->vna_flags);
175 bfd_h_put_16 (abfd, src->vna_other, dst->vna_other);
176 bfd_h_put_32 (abfd, src->vna_name, dst->vna_name);
177 bfd_h_put_32 (abfd, src->vna_next, dst->vna_next);
180 /* Swap in a Versym structure. */
183 _bfd_elf_swap_versym_in (abfd, src, dst)
185 const Elf_External_Versym *src;
186 Elf_Internal_Versym *dst;
188 dst->vs_vers = bfd_h_get_16 (abfd, src->vs_vers);
191 /* Swap out a Versym structure. */
194 _bfd_elf_swap_versym_out (abfd, src, dst)
196 const Elf_Internal_Versym *src;
197 Elf_External_Versym *dst;
199 bfd_h_put_16 (abfd, src->vs_vers, dst->vs_vers);
202 /* Standard ELF hash function. Do not change this function; you will
203 cause invalid hash tables to be generated. */
206 bfd_elf_hash (namearg)
209 const unsigned char *name = (const unsigned char *) namearg;
214 while ((ch = *name++) != '\0')
217 if ((g = (h & 0xf0000000)) != 0)
220 /* The ELF ABI says `h &= ~g', but this is equivalent in
221 this case and on some machines one insn instead of two. */
228 /* Read a specified number of bytes at a specified offset in an ELF
229 file, into a newly allocated buffer, and return a pointer to the
233 elf_read (abfd, offset, size)
240 if ((buf = bfd_alloc (abfd, size)) == NULL)
242 if (bfd_seek (abfd, offset, SEEK_SET) == -1)
244 if (bfd_read ((PTR) buf, size, 1, abfd) != size)
246 if (bfd_get_error () != bfd_error_system_call)
247 bfd_set_error (bfd_error_file_truncated);
254 bfd_elf_mkobject (abfd)
257 /* this just does initialization */
258 /* coff_mkobject zalloc's space for tdata.coff_obj_data ... */
259 elf_tdata (abfd) = (struct elf_obj_tdata *)
260 bfd_zalloc (abfd, sizeof (struct elf_obj_tdata));
261 if (elf_tdata (abfd) == 0)
263 /* since everything is done at close time, do we need any
270 bfd_elf_mkcorefile (abfd)
273 /* I think this can be done just like an object file. */
274 return bfd_elf_mkobject (abfd);
278 bfd_elf_get_str_section (abfd, shindex)
280 unsigned int shindex;
282 Elf_Internal_Shdr **i_shdrp;
283 char *shstrtab = NULL;
285 unsigned int shstrtabsize;
287 i_shdrp = elf_elfsections (abfd);
288 if (i_shdrp == 0 || i_shdrp[shindex] == 0)
291 shstrtab = (char *) i_shdrp[shindex]->contents;
292 if (shstrtab == NULL)
294 /* No cached one, attempt to read, and cache what we read. */
295 offset = i_shdrp[shindex]->sh_offset;
296 shstrtabsize = i_shdrp[shindex]->sh_size;
297 shstrtab = elf_read (abfd, offset, shstrtabsize);
298 i_shdrp[shindex]->contents = (PTR) shstrtab;
304 bfd_elf_string_from_elf_section (abfd, shindex, strindex)
306 unsigned int shindex;
307 unsigned int strindex;
309 Elf_Internal_Shdr *hdr;
314 hdr = elf_elfsections (abfd)[shindex];
316 if (hdr->contents == NULL
317 && bfd_elf_get_str_section (abfd, shindex) == NULL)
320 if (strindex >= hdr->sh_size)
322 (*_bfd_error_handler)
323 (_("%s: invalid string offset %u >= %lu for section `%s'"),
324 bfd_get_filename (abfd), strindex, (unsigned long) hdr->sh_size,
325 ((shindex == elf_elfheader(abfd)->e_shstrndx
326 && strindex == hdr->sh_name)
328 : elf_string_from_elf_strtab (abfd, hdr->sh_name)));
332 return ((char *) hdr->contents) + strindex;
335 /* Make a BFD section from an ELF section. We store a pointer to the
336 BFD section in the bfd_section field of the header. */
339 _bfd_elf_make_section_from_shdr (abfd, hdr, name)
341 Elf_Internal_Shdr *hdr;
347 if (hdr->bfd_section != NULL)
349 BFD_ASSERT (strcmp (name,
350 bfd_get_section_name (abfd, hdr->bfd_section)) == 0);
354 newsect = bfd_make_section_anyway (abfd, name);
358 newsect->filepos = hdr->sh_offset;
360 if (! bfd_set_section_vma (abfd, newsect, hdr->sh_addr)
361 || ! bfd_set_section_size (abfd, newsect, hdr->sh_size)
362 || ! bfd_set_section_alignment (abfd, newsect,
363 bfd_log2 (hdr->sh_addralign)))
366 flags = SEC_NO_FLAGS;
367 if (hdr->sh_type != SHT_NOBITS)
368 flags |= SEC_HAS_CONTENTS;
369 if ((hdr->sh_flags & SHF_ALLOC) != 0)
372 if (hdr->sh_type != SHT_NOBITS)
375 if ((hdr->sh_flags & SHF_WRITE) == 0)
376 flags |= SEC_READONLY;
377 if ((hdr->sh_flags & SHF_EXECINSTR) != 0)
379 else if ((flags & SEC_LOAD) != 0)
382 /* The debugging sections appear to be recognized only by name, not
384 if (strncmp (name, ".debug", sizeof ".debug" - 1) == 0
385 || strncmp (name, ".line", sizeof ".line" - 1) == 0
386 || strncmp (name, ".stab", sizeof ".stab" - 1) == 0)
387 flags |= SEC_DEBUGGING;
389 /* As a GNU extension, if the name begins with .gnu.linkonce, we
390 only link a single copy of the section. This is used to support
391 g++. g++ will emit each template expansion in its own section.
392 The symbols will be defined as weak, so that multiple definitions
393 are permitted. The GNU linker extension is to actually discard
394 all but one of the sections. */
395 if (strncmp (name, ".gnu.linkonce", sizeof ".gnu.linkonce" - 1) == 0)
396 flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
398 if (! bfd_set_section_flags (abfd, newsect, flags))
401 if ((flags & SEC_ALLOC) != 0)
403 Elf_Internal_Phdr *phdr;
406 /* Look through the phdrs to see if we need to adjust the lma.
407 If all the p_paddr fields are zero, we ignore them, since
408 some ELF linkers produce such output. */
409 phdr = elf_tdata (abfd)->phdr;
410 for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
412 if (phdr->p_paddr != 0)
415 if (i < elf_elfheader (abfd)->e_phnum)
417 phdr = elf_tdata (abfd)->phdr;
418 for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
420 if (phdr->p_type == PT_LOAD
421 && phdr->p_vaddr != phdr->p_paddr
422 && phdr->p_vaddr <= hdr->sh_addr
423 && (phdr->p_vaddr + phdr->p_memsz
424 >= hdr->sh_addr + hdr->sh_size)
425 && ((flags & SEC_LOAD) == 0
426 || (phdr->p_offset <= (bfd_vma) hdr->sh_offset
427 && (phdr->p_offset + phdr->p_filesz
428 >= hdr->sh_offset + hdr->sh_size))))
430 newsect->lma += phdr->p_paddr - phdr->p_vaddr;
437 hdr->bfd_section = newsect;
438 elf_section_data (newsect)->this_hdr = *hdr;
448 struct elf_internal_shdr *bfd_elf_find_section (bfd *abfd, char *name);
451 Helper functions for GDB to locate the string tables.
452 Since BFD hides string tables from callers, GDB needs to use an
453 internal hook to find them. Sun's .stabstr, in particular,
454 isn't even pointed to by the .stab section, so ordinary
455 mechanisms wouldn't work to find it, even if we had some.
458 struct elf_internal_shdr *
459 bfd_elf_find_section (abfd, name)
463 Elf_Internal_Shdr **i_shdrp;
468 i_shdrp = elf_elfsections (abfd);
471 shstrtab = bfd_elf_get_str_section
472 (abfd, elf_elfheader (abfd)->e_shstrndx);
473 if (shstrtab != NULL)
475 max = elf_elfheader (abfd)->e_shnum;
476 for (i = 1; i < max; i++)
477 if (!strcmp (&shstrtab[i_shdrp[i]->sh_name], name))
484 const char *const bfd_elf_section_type_names[] = {
485 "SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB",
486 "SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE",
487 "SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM",
490 /* ELF relocs are against symbols. If we are producing relocateable
491 output, and the reloc is against an external symbol, and nothing
492 has given us any additional addend, the resulting reloc will also
493 be against the same symbol. In such a case, we don't want to
494 change anything about the way the reloc is handled, since it will
495 all be done at final link time. Rather than put special case code
496 into bfd_perform_relocation, all the reloc types use this howto
497 function. It just short circuits the reloc if producing
498 relocateable output against an external symbol. */
501 bfd_reloc_status_type
502 bfd_elf_generic_reloc (abfd,
509 bfd *abfd ATTRIBUTE_UNUSED;
510 arelent *reloc_entry;
512 PTR data ATTRIBUTE_UNUSED;
513 asection *input_section;
515 char **error_message ATTRIBUTE_UNUSED;
517 if (output_bfd != (bfd *) NULL
518 && (symbol->flags & BSF_SECTION_SYM) == 0
519 && (! reloc_entry->howto->partial_inplace
520 || reloc_entry->addend == 0))
522 reloc_entry->address += input_section->output_offset;
526 return bfd_reloc_continue;
529 /* Print out the program headers. */
532 _bfd_elf_print_private_bfd_data (abfd, farg)
536 FILE *f = (FILE *) farg;
537 Elf_Internal_Phdr *p;
539 bfd_byte *dynbuf = NULL;
541 p = elf_tdata (abfd)->phdr;
546 fprintf (f, _("\nProgram Header:\n"));
547 c = elf_elfheader (abfd)->e_phnum;
548 for (i = 0; i < c; i++, p++)
555 case PT_NULL: s = "NULL"; break;
556 case PT_LOAD: s = "LOAD"; break;
557 case PT_DYNAMIC: s = "DYNAMIC"; break;
558 case PT_INTERP: s = "INTERP"; break;
559 case PT_NOTE: s = "NOTE"; break;
560 case PT_SHLIB: s = "SHLIB"; break;
561 case PT_PHDR: s = "PHDR"; break;
562 default: sprintf (buf, "0x%lx", p->p_type); s = buf; break;
564 fprintf (f, "%8s off 0x", s);
565 fprintf_vma (f, p->p_offset);
566 fprintf (f, " vaddr 0x");
567 fprintf_vma (f, p->p_vaddr);
568 fprintf (f, " paddr 0x");
569 fprintf_vma (f, p->p_paddr);
570 fprintf (f, " align 2**%u\n", bfd_log2 (p->p_align));
571 fprintf (f, " filesz 0x");
572 fprintf_vma (f, p->p_filesz);
573 fprintf (f, " memsz 0x");
574 fprintf_vma (f, p->p_memsz);
575 fprintf (f, " flags %c%c%c",
576 (p->p_flags & PF_R) != 0 ? 'r' : '-',
577 (p->p_flags & PF_W) != 0 ? 'w' : '-',
578 (p->p_flags & PF_X) != 0 ? 'x' : '-');
579 if ((p->p_flags &~ (PF_R | PF_W | PF_X)) != 0)
580 fprintf (f, " %lx", p->p_flags &~ (PF_R | PF_W | PF_X));
585 s = bfd_get_section_by_name (abfd, ".dynamic");
590 bfd_byte *extdyn, *extdynend;
592 void (*swap_dyn_in) PARAMS ((bfd *, const PTR, Elf_Internal_Dyn *));
594 fprintf (f, _("\nDynamic Section:\n"));
596 dynbuf = (bfd_byte *) bfd_malloc (s->_raw_size);
599 if (! bfd_get_section_contents (abfd, s, (PTR) dynbuf, (file_ptr) 0,
603 elfsec = _bfd_elf_section_from_bfd_section (abfd, s);
606 link = elf_elfsections (abfd)[elfsec]->sh_link;
608 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
609 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
612 extdynend = extdyn + s->_raw_size;
613 for (; extdyn < extdynend; extdyn += extdynsize)
615 Elf_Internal_Dyn dyn;
620 (*swap_dyn_in) (abfd, (PTR) extdyn, &dyn);
622 if (dyn.d_tag == DT_NULL)
629 sprintf (ab, "0x%lx", (unsigned long) dyn.d_tag);
633 case DT_NEEDED: name = "NEEDED"; stringp = true; break;
634 case DT_PLTRELSZ: name = "PLTRELSZ"; break;
635 case DT_PLTGOT: name = "PLTGOT"; break;
636 case DT_HASH: name = "HASH"; break;
637 case DT_STRTAB: name = "STRTAB"; break;
638 case DT_SYMTAB: name = "SYMTAB"; break;
639 case DT_RELA: name = "RELA"; break;
640 case DT_RELASZ: name = "RELASZ"; break;
641 case DT_RELAENT: name = "RELAENT"; break;
642 case DT_STRSZ: name = "STRSZ"; break;
643 case DT_SYMENT: name = "SYMENT"; break;
644 case DT_INIT: name = "INIT"; break;
645 case DT_FINI: name = "FINI"; break;
646 case DT_SONAME: name = "SONAME"; stringp = true; break;
647 case DT_RPATH: name = "RPATH"; stringp = true; break;
648 case DT_SYMBOLIC: name = "SYMBOLIC"; break;
649 case DT_REL: name = "REL"; break;
650 case DT_RELSZ: name = "RELSZ"; break;
651 case DT_RELENT: name = "RELENT"; break;
652 case DT_PLTREL: name = "PLTREL"; break;
653 case DT_DEBUG: name = "DEBUG"; break;
654 case DT_TEXTREL: name = "TEXTREL"; break;
655 case DT_JMPREL: name = "JMPREL"; break;
656 case DT_AUXILIARY: name = "AUXILIARY"; stringp = true; break;
657 case DT_FILTER: name = "FILTER"; stringp = true; break;
658 case DT_VERSYM: name = "VERSYM"; break;
659 case DT_VERDEF: name = "VERDEF"; break;
660 case DT_VERDEFNUM: name = "VERDEFNUM"; break;
661 case DT_VERNEED: name = "VERNEED"; break;
662 case DT_VERNEEDNUM: name = "VERNEEDNUM"; break;
665 fprintf (f, " %-11s ", name);
667 fprintf (f, "0x%lx", (unsigned long) dyn.d_un.d_val);
672 string = bfd_elf_string_from_elf_section (abfd, link,
676 fprintf (f, "%s", string);
685 if ((elf_dynverdef (abfd) != 0 && elf_tdata (abfd)->verdef == NULL)
686 || (elf_dynverref (abfd) != 0 && elf_tdata (abfd)->verref == NULL))
688 if (! _bfd_elf_slurp_version_tables (abfd))
692 if (elf_dynverdef (abfd) != 0)
694 Elf_Internal_Verdef *t;
696 fprintf (f, _("\nVersion definitions:\n"));
697 for (t = elf_tdata (abfd)->verdef; t != NULL; t = t->vd_nextdef)
699 fprintf (f, "%d 0x%2.2x 0x%8.8lx %s\n", t->vd_ndx,
700 t->vd_flags, t->vd_hash, t->vd_nodename);
701 if (t->vd_auxptr->vda_nextptr != NULL)
703 Elf_Internal_Verdaux *a;
706 for (a = t->vd_auxptr->vda_nextptr;
709 fprintf (f, "%s ", a->vda_nodename);
715 if (elf_dynverref (abfd) != 0)
717 Elf_Internal_Verneed *t;
719 fprintf (f, _("\nVersion References:\n"));
720 for (t = elf_tdata (abfd)->verref; t != NULL; t = t->vn_nextref)
722 Elf_Internal_Vernaux *a;
724 fprintf (f, _(" required from %s:\n"), t->vn_filename);
725 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
726 fprintf (f, " 0x%8.8lx 0x%2.2x %2.2d %s\n", a->vna_hash,
727 a->vna_flags, a->vna_other, a->vna_nodename);
739 /* Display ELF-specific fields of a symbol. */
742 bfd_elf_print_symbol (abfd, filep, symbol, how)
746 bfd_print_symbol_type how;
748 FILE *file = (FILE *) filep;
751 case bfd_print_symbol_name:
752 fprintf (file, "%s", symbol->name);
754 case bfd_print_symbol_more:
755 fprintf (file, "elf ");
756 fprintf_vma (file, symbol->value);
757 fprintf (file, " %lx", (long) symbol->flags);
759 case bfd_print_symbol_all:
761 CONST char *section_name;
762 CONST char *name = NULL;
763 struct elf_backend_data *bed;
764 unsigned char st_other;
766 section_name = symbol->section ? symbol->section->name : "(*none*)";
768 bed = get_elf_backend_data (abfd);
769 if (bed->elf_backend_print_symbol_all)
770 name = (*bed->elf_backend_print_symbol_all) (abfd, filep, symbol);
775 bfd_print_symbol_vandf ((PTR) file, symbol);
778 fprintf (file, " %s\t", section_name);
779 /* Print the "other" value for a symbol. For common symbols,
780 we've already printed the size; now print the alignment.
781 For other symbols, we have no specified alignment, and
782 we've printed the address; now print the size. */
784 (bfd_is_com_section (symbol->section)
785 ? ((elf_symbol_type *) symbol)->internal_elf_sym.st_value
786 : ((elf_symbol_type *) symbol)->internal_elf_sym.st_size));
788 /* If we have version information, print it. */
789 if (elf_tdata (abfd)->dynversym_section != 0
790 && (elf_tdata (abfd)->dynverdef_section != 0
791 || elf_tdata (abfd)->dynverref_section != 0))
794 const char *version_string;
796 vernum = ((elf_symbol_type *) symbol)->version & VERSYM_VERSION;
800 else if (vernum == 1)
801 version_string = "Base";
802 else if (vernum <= elf_tdata (abfd)->cverdefs)
804 elf_tdata (abfd)->verdef[vernum - 1].vd_nodename;
807 Elf_Internal_Verneed *t;
810 for (t = elf_tdata (abfd)->verref;
814 Elf_Internal_Vernaux *a;
816 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
818 if (a->vna_other == vernum)
820 version_string = a->vna_nodename;
827 if ((((elf_symbol_type *) symbol)->version & VERSYM_HIDDEN) == 0)
828 fprintf (file, " %-11s", version_string);
833 fprintf (file, " (%s)", version_string);
834 for (i = 10 - strlen (version_string); i > 0; --i)
839 /* If the st_other field is not zero, print it. */
840 st_other = ((elf_symbol_type *) symbol)->internal_elf_sym.st_other;
845 case STV_INTERNAL: fprintf (file, " .internal"); break;
846 case STV_HIDDEN: fprintf (file, " .hidden"); break;
847 case STV_PROTECTED: fprintf (file, " .protected"); break;
849 /* Some other non-defined flags are also present, so print
851 fprintf (file, " 0x%02x", (unsigned int) st_other);
854 fprintf (file, " %s", name);
860 /* Create an entry in an ELF linker hash table. */
862 struct bfd_hash_entry *
863 _bfd_elf_link_hash_newfunc (entry, table, string)
864 struct bfd_hash_entry *entry;
865 struct bfd_hash_table *table;
868 struct elf_link_hash_entry *ret = (struct elf_link_hash_entry *) entry;
870 /* Allocate the structure if it has not already been allocated by a
872 if (ret == (struct elf_link_hash_entry *) NULL)
873 ret = ((struct elf_link_hash_entry *)
874 bfd_hash_allocate (table, sizeof (struct elf_link_hash_entry)));
875 if (ret == (struct elf_link_hash_entry *) NULL)
876 return (struct bfd_hash_entry *) ret;
878 /* Call the allocation method of the superclass. */
879 ret = ((struct elf_link_hash_entry *)
880 _bfd_link_hash_newfunc ((struct bfd_hash_entry *) ret,
882 if (ret != (struct elf_link_hash_entry *) NULL)
884 /* Set local fields. */
888 ret->dynstr_index = 0;
890 ret->got.offset = (bfd_vma) -1;
891 ret->plt.offset = (bfd_vma) -1;
892 ret->linker_section_pointer = (elf_linker_section_pointers_t *)0;
893 ret->verinfo.verdef = NULL;
894 ret->vtable_entries_used = NULL;
895 ret->vtable_entries_size = 0;
896 ret->vtable_parent = NULL;
897 ret->type = STT_NOTYPE;
899 /* Assume that we have been called by a non-ELF symbol reader.
900 This flag is then reset by the code which reads an ELF input
901 file. This ensures that a symbol created by a non-ELF symbol
902 reader will have the flag set correctly. */
903 ret->elf_link_hash_flags = ELF_LINK_NON_ELF;
906 return (struct bfd_hash_entry *) ret;
909 /* Copy data from an indirect symbol to its direct symbol, hiding the
910 old indirect symbol. */
913 _bfd_elf_link_hash_copy_indirect (dir, ind)
914 struct elf_link_hash_entry *dir, *ind;
916 /* Copy down any references that we may have already seen to the
917 symbol which just became indirect. */
919 dir->elf_link_hash_flags |=
920 (ind->elf_link_hash_flags
921 & (ELF_LINK_HASH_REF_DYNAMIC
922 | ELF_LINK_HASH_REF_REGULAR
923 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
924 | ELF_LINK_NON_GOT_REF));
926 /* Copy over the global and procedure linkage table offset entries.
927 These may have been already set up by a check_relocs routine. */
928 if (dir->got.offset == (bfd_vma) -1)
930 dir->got.offset = ind->got.offset;
931 ind->got.offset = (bfd_vma) -1;
933 BFD_ASSERT (ind->got.offset == (bfd_vma) -1);
935 if (dir->plt.offset == (bfd_vma) -1)
937 dir->plt.offset = ind->plt.offset;
938 ind->plt.offset = (bfd_vma) -1;
940 BFD_ASSERT (ind->plt.offset == (bfd_vma) -1);
942 if (dir->dynindx == -1)
944 dir->dynindx = ind->dynindx;
945 dir->dynstr_index = ind->dynstr_index;
947 ind->dynstr_index = 0;
949 BFD_ASSERT (ind->dynindx == -1);
953 _bfd_elf_link_hash_hide_symbol(h)
954 struct elf_link_hash_entry *h;
956 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
958 h->plt.offset = (bfd_vma) -1;
961 /* Initialize an ELF linker hash table. */
964 _bfd_elf_link_hash_table_init (table, abfd, newfunc)
965 struct elf_link_hash_table *table;
967 struct bfd_hash_entry *(*newfunc) PARAMS ((struct bfd_hash_entry *,
968 struct bfd_hash_table *,
971 table->dynamic_sections_created = false;
972 table->dynobj = NULL;
973 /* The first dynamic symbol is a dummy. */
974 table->dynsymcount = 1;
975 table->dynstr = NULL;
976 table->bucketcount = 0;
977 table->needed = NULL;
979 table->stab_info = NULL;
980 return _bfd_link_hash_table_init (&table->root, abfd, newfunc);
983 /* Create an ELF linker hash table. */
985 struct bfd_link_hash_table *
986 _bfd_elf_link_hash_table_create (abfd)
989 struct elf_link_hash_table *ret;
991 ret = ((struct elf_link_hash_table *)
992 bfd_alloc (abfd, sizeof (struct elf_link_hash_table)));
993 if (ret == (struct elf_link_hash_table *) NULL)
996 if (! _bfd_elf_link_hash_table_init (ret, abfd, _bfd_elf_link_hash_newfunc))
998 bfd_release (abfd, ret);
1005 /* This is a hook for the ELF emulation code in the generic linker to
1006 tell the backend linker what file name to use for the DT_NEEDED
1007 entry for a dynamic object. The generic linker passes name as an
1008 empty string to indicate that no DT_NEEDED entry should be made. */
1011 bfd_elf_set_dt_needed_name (abfd, name)
1015 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
1016 && bfd_get_format (abfd) == bfd_object)
1017 elf_dt_name (abfd) = name;
1020 /* Get the list of DT_NEEDED entries for a link. This is a hook for
1021 the linker ELF emulation code. */
1023 struct bfd_link_needed_list *
1024 bfd_elf_get_needed_list (abfd, info)
1025 bfd *abfd ATTRIBUTE_UNUSED;
1026 struct bfd_link_info *info;
1028 if (info->hash->creator->flavour != bfd_target_elf_flavour)
1030 return elf_hash_table (info)->needed;
1033 /* Get the name actually used for a dynamic object for a link. This
1034 is the SONAME entry if there is one. Otherwise, it is the string
1035 passed to bfd_elf_set_dt_needed_name, or it is the filename. */
1038 bfd_elf_get_dt_soname (abfd)
1041 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
1042 && bfd_get_format (abfd) == bfd_object)
1043 return elf_dt_name (abfd);
1047 /* Get the list of DT_NEEDED entries from a BFD. This is a hook for
1048 the ELF linker emulation code. */
1051 bfd_elf_get_bfd_needed_list (abfd, pneeded)
1053 struct bfd_link_needed_list **pneeded;
1056 bfd_byte *dynbuf = NULL;
1059 bfd_byte *extdyn, *extdynend;
1061 void (*swap_dyn_in) PARAMS ((bfd *, const PTR, Elf_Internal_Dyn *));
1065 if (bfd_get_flavour (abfd) != bfd_target_elf_flavour
1066 || bfd_get_format (abfd) != bfd_object)
1069 s = bfd_get_section_by_name (abfd, ".dynamic");
1070 if (s == NULL || s->_raw_size == 0)
1073 dynbuf = (bfd_byte *) bfd_malloc (s->_raw_size);
1077 if (! bfd_get_section_contents (abfd, s, (PTR) dynbuf, (file_ptr) 0,
1081 elfsec = _bfd_elf_section_from_bfd_section (abfd, s);
1085 link = elf_elfsections (abfd)[elfsec]->sh_link;
1087 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
1088 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
1091 extdynend = extdyn + s->_raw_size;
1092 for (; extdyn < extdynend; extdyn += extdynsize)
1094 Elf_Internal_Dyn dyn;
1096 (*swap_dyn_in) (abfd, (PTR) extdyn, &dyn);
1098 if (dyn.d_tag == DT_NULL)
1101 if (dyn.d_tag == DT_NEEDED)
1104 struct bfd_link_needed_list *l;
1106 string = bfd_elf_string_from_elf_section (abfd, link,
1111 l = (struct bfd_link_needed_list *) bfd_alloc (abfd, sizeof *l);
1132 /* Allocate an ELF string table--force the first byte to be zero. */
1134 struct bfd_strtab_hash *
1135 _bfd_elf_stringtab_init ()
1137 struct bfd_strtab_hash *ret;
1139 ret = _bfd_stringtab_init ();
1144 loc = _bfd_stringtab_add (ret, "", true, false);
1145 BFD_ASSERT (loc == 0 || loc == (bfd_size_type) -1);
1146 if (loc == (bfd_size_type) -1)
1148 _bfd_stringtab_free (ret);
1155 /* ELF .o/exec file reading */
1157 /* Create a new bfd section from an ELF section header. */
1160 bfd_section_from_shdr (abfd, shindex)
1162 unsigned int shindex;
1164 Elf_Internal_Shdr *hdr = elf_elfsections (abfd)[shindex];
1165 Elf_Internal_Ehdr *ehdr = elf_elfheader (abfd);
1166 struct elf_backend_data *bed = get_elf_backend_data (abfd);
1169 name = elf_string_from_elf_strtab (abfd, hdr->sh_name);
1171 switch (hdr->sh_type)
1174 /* Inactive section. Throw it away. */
1177 case SHT_PROGBITS: /* Normal section with contents. */
1178 case SHT_DYNAMIC: /* Dynamic linking information. */
1179 case SHT_NOBITS: /* .bss section. */
1180 case SHT_HASH: /* .hash section. */
1181 case SHT_NOTE: /* .note section. */
1182 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1184 case SHT_SYMTAB: /* A symbol table */
1185 if (elf_onesymtab (abfd) == shindex)
1188 BFD_ASSERT (hdr->sh_entsize == bed->s->sizeof_sym);
1189 BFD_ASSERT (elf_onesymtab (abfd) == 0);
1190 elf_onesymtab (abfd) = shindex;
1191 elf_tdata (abfd)->symtab_hdr = *hdr;
1192 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->symtab_hdr;
1193 abfd->flags |= HAS_SYMS;
1195 /* Sometimes a shared object will map in the symbol table. If
1196 SHF_ALLOC is set, and this is a shared object, then we also
1197 treat this section as a BFD section. We can not base the
1198 decision purely on SHF_ALLOC, because that flag is sometimes
1199 set in a relocateable object file, which would confuse the
1201 if ((hdr->sh_flags & SHF_ALLOC) != 0
1202 && (abfd->flags & DYNAMIC) != 0
1203 && ! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
1208 case SHT_DYNSYM: /* A dynamic symbol table */
1209 if (elf_dynsymtab (abfd) == shindex)
1212 BFD_ASSERT (hdr->sh_entsize == bed->s->sizeof_sym);
1213 BFD_ASSERT (elf_dynsymtab (abfd) == 0);
1214 elf_dynsymtab (abfd) = shindex;
1215 elf_tdata (abfd)->dynsymtab_hdr = *hdr;
1216 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->dynsymtab_hdr;
1217 abfd->flags |= HAS_SYMS;
1219 /* Besides being a symbol table, we also treat this as a regular
1220 section, so that objcopy can handle it. */
1221 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1223 case SHT_STRTAB: /* A string table */
1224 if (hdr->bfd_section != NULL)
1226 if (ehdr->e_shstrndx == shindex)
1228 elf_tdata (abfd)->shstrtab_hdr = *hdr;
1229 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->shstrtab_hdr;
1235 for (i = 1; i < ehdr->e_shnum; i++)
1237 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1238 if (hdr2->sh_link == shindex)
1240 if (! bfd_section_from_shdr (abfd, i))
1242 if (elf_onesymtab (abfd) == i)
1244 elf_tdata (abfd)->strtab_hdr = *hdr;
1245 elf_elfsections (abfd)[shindex] =
1246 &elf_tdata (abfd)->strtab_hdr;
1249 if (elf_dynsymtab (abfd) == i)
1251 elf_tdata (abfd)->dynstrtab_hdr = *hdr;
1252 elf_elfsections (abfd)[shindex] = hdr =
1253 &elf_tdata (abfd)->dynstrtab_hdr;
1254 /* We also treat this as a regular section, so
1255 that objcopy can handle it. */
1258 #if 0 /* Not handling other string tables specially right now. */
1259 hdr2 = elf_elfsections (abfd)[i]; /* in case it moved */
1260 /* We have a strtab for some random other section. */
1261 newsect = (asection *) hdr2->bfd_section;
1264 hdr->bfd_section = newsect;
1265 hdr2 = &elf_section_data (newsect)->str_hdr;
1267 elf_elfsections (abfd)[shindex] = hdr2;
1273 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1277 /* *These* do a lot of work -- but build no sections! */
1279 asection *target_sect;
1280 Elf_Internal_Shdr *hdr2;
1282 /* Check for a bogus link to avoid crashing. */
1283 if (hdr->sh_link >= ehdr->e_shnum)
1285 ((*_bfd_error_handler)
1286 (_("%s: invalid link %lu for reloc section %s (index %u)"),
1287 bfd_get_filename (abfd), hdr->sh_link, name, shindex));
1288 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1291 /* For some incomprehensible reason Oracle distributes
1292 libraries for Solaris in which some of the objects have
1293 bogus sh_link fields. It would be nice if we could just
1294 reject them, but, unfortunately, some people need to use
1295 them. We scan through the section headers; if we find only
1296 one suitable symbol table, we clobber the sh_link to point
1297 to it. I hope this doesn't break anything. */
1298 if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_SYMTAB
1299 && elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_DYNSYM)
1305 for (scan = 1; scan < ehdr->e_shnum; scan++)
1307 if (elf_elfsections (abfd)[scan]->sh_type == SHT_SYMTAB
1308 || elf_elfsections (abfd)[scan]->sh_type == SHT_DYNSYM)
1319 hdr->sh_link = found;
1322 /* Get the symbol table. */
1323 if (elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_SYMTAB
1324 && ! bfd_section_from_shdr (abfd, hdr->sh_link))
1327 /* If this reloc section does not use the main symbol table we
1328 don't treat it as a reloc section. BFD can't adequately
1329 represent such a section, so at least for now, we don't
1330 try. We just present it as a normal section. */
1331 if (hdr->sh_link != elf_onesymtab (abfd))
1332 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1334 if (! bfd_section_from_shdr (abfd, hdr->sh_info))
1336 target_sect = bfd_section_from_elf_index (abfd, hdr->sh_info);
1337 if (target_sect == NULL)
1340 if ((target_sect->flags & SEC_RELOC) == 0
1341 || target_sect->reloc_count == 0)
1342 hdr2 = &elf_section_data (target_sect)->rel_hdr;
1345 BFD_ASSERT (elf_section_data (target_sect)->rel_hdr2 == NULL);
1346 hdr2 = (Elf_Internal_Shdr *) bfd_alloc (abfd, sizeof (*hdr2));
1347 elf_section_data (target_sect)->rel_hdr2 = hdr2;
1350 elf_elfsections (abfd)[shindex] = hdr2;
1351 target_sect->reloc_count += hdr->sh_size / hdr->sh_entsize;
1352 target_sect->flags |= SEC_RELOC;
1353 target_sect->relocation = NULL;
1354 target_sect->rel_filepos = hdr->sh_offset;
1355 /* In the section to which the relocations apply, mark whether
1356 its relocations are of the REL or RELA variety. */
1357 elf_section_data (target_sect)->use_rela_p
1358 = (hdr->sh_type == SHT_RELA);
1359 abfd->flags |= HAS_RELOC;
1364 case SHT_GNU_verdef:
1365 elf_dynverdef (abfd) = shindex;
1366 elf_tdata (abfd)->dynverdef_hdr = *hdr;
1367 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1370 case SHT_GNU_versym:
1371 elf_dynversym (abfd) = shindex;
1372 elf_tdata (abfd)->dynversym_hdr = *hdr;
1373 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1376 case SHT_GNU_verneed:
1377 elf_dynverref (abfd) = shindex;
1378 elf_tdata (abfd)->dynverref_hdr = *hdr;
1379 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1386 /* Check for any processor-specific section types. */
1388 if (bed->elf_backend_section_from_shdr)
1389 (*bed->elf_backend_section_from_shdr) (abfd, hdr, name);
1397 /* Given an ELF section number, retrieve the corresponding BFD
1401 bfd_section_from_elf_index (abfd, index)
1405 BFD_ASSERT (index > 0 && index < SHN_LORESERVE);
1406 if (index >= elf_elfheader (abfd)->e_shnum)
1408 return elf_elfsections (abfd)[index]->bfd_section;
1412 _bfd_elf_new_section_hook (abfd, sec)
1416 struct bfd_elf_section_data *sdata;
1418 sdata = (struct bfd_elf_section_data *) bfd_zalloc (abfd, sizeof (*sdata));
1421 sec->used_by_bfd = (PTR) sdata;
1423 /* Indicate whether or not this section should use RELA relocations. */
1425 = get_elf_backend_data (abfd)->default_use_rela_p;
1430 /* Create a new bfd section from an ELF program header.
1432 Since program segments have no names, we generate a synthetic name
1433 of the form segment<NUM>, where NUM is generally the index in the
1434 program header table. For segments that are split (see below) we
1435 generate the names segment<NUM>a and segment<NUM>b.
1437 Note that some program segments may have a file size that is different than
1438 (less than) the memory size. All this means is that at execution the
1439 system must allocate the amount of memory specified by the memory size,
1440 but only initialize it with the first "file size" bytes read from the
1441 file. This would occur for example, with program segments consisting
1442 of combined data+bss.
1444 To handle the above situation, this routine generates TWO bfd sections
1445 for the single program segment. The first has the length specified by
1446 the file size of the segment, and the second has the length specified
1447 by the difference between the two sizes. In effect, the segment is split
1448 into it's initialized and uninitialized parts.
1453 _bfd_elf_make_section_from_phdr (abfd, hdr, index, typename)
1455 Elf_Internal_Phdr *hdr;
1457 const char *typename;
1464 split = ((hdr->p_memsz > 0)
1465 && (hdr->p_filesz > 0)
1466 && (hdr->p_memsz > hdr->p_filesz));
1467 sprintf (namebuf, "%s%d%s", typename, index, split ? "a" : "");
1468 name = bfd_alloc (abfd, strlen (namebuf) + 1);
1471 strcpy (name, namebuf);
1472 newsect = bfd_make_section (abfd, name);
1473 if (newsect == NULL)
1475 newsect->vma = hdr->p_vaddr;
1476 newsect->lma = hdr->p_paddr;
1477 newsect->_raw_size = hdr->p_filesz;
1478 newsect->filepos = hdr->p_offset;
1479 newsect->flags |= SEC_HAS_CONTENTS;
1480 if (hdr->p_type == PT_LOAD)
1482 newsect->flags |= SEC_ALLOC;
1483 newsect->flags |= SEC_LOAD;
1484 if (hdr->p_flags & PF_X)
1486 /* FIXME: all we known is that it has execute PERMISSION,
1488 newsect->flags |= SEC_CODE;
1491 if (!(hdr->p_flags & PF_W))
1493 newsect->flags |= SEC_READONLY;
1498 sprintf (namebuf, "%s%db", typename, index);
1499 name = bfd_alloc (abfd, strlen (namebuf) + 1);
1502 strcpy (name, namebuf);
1503 newsect = bfd_make_section (abfd, name);
1504 if (newsect == NULL)
1506 newsect->vma = hdr->p_vaddr + hdr->p_filesz;
1507 newsect->lma = hdr->p_paddr + hdr->p_filesz;
1508 newsect->_raw_size = hdr->p_memsz - hdr->p_filesz;
1509 if (hdr->p_type == PT_LOAD)
1511 newsect->flags |= SEC_ALLOC;
1512 if (hdr->p_flags & PF_X)
1513 newsect->flags |= SEC_CODE;
1515 if (!(hdr->p_flags & PF_W))
1516 newsect->flags |= SEC_READONLY;
1523 bfd_section_from_phdr (abfd, hdr, index)
1525 Elf_Internal_Phdr *hdr;
1528 struct elf_backend_data *bed;
1530 switch (hdr->p_type)
1533 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "null");
1536 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "load");
1539 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "dynamic");
1542 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "interp");
1545 if (! _bfd_elf_make_section_from_phdr (abfd, hdr, index, "note"))
1547 if (! elfcore_read_notes (abfd, hdr->p_offset, hdr->p_filesz))
1552 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "shlib");
1555 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "phdr");
1558 /* Check for any processor-specific program segment types.
1559 If no handler for them, default to making "segment" sections. */
1560 bed = get_elf_backend_data (abfd);
1561 if (bed->elf_backend_section_from_phdr)
1562 return (*bed->elf_backend_section_from_phdr) (abfd, hdr, index);
1564 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "segment");
1568 /* Initialize REL_HDR, the section-header for new section, containing
1569 relocations against ASECT. If USE_RELA_P is true, we use RELA
1570 relocations; otherwise, we use REL relocations. */
1573 _bfd_elf_init_reloc_shdr (abfd, rel_hdr, asect, use_rela_p)
1575 Elf_Internal_Shdr *rel_hdr;
1580 struct elf_backend_data *bed;
1582 bed = get_elf_backend_data (abfd);
1583 name = bfd_alloc (abfd, sizeof ".rela" + strlen (asect->name));
1586 sprintf (name, "%s%s", use_rela_p ? ".rela" : ".rel", asect->name);
1588 (unsigned int) _bfd_stringtab_add (elf_shstrtab (abfd), name,
1590 if (rel_hdr->sh_name == (unsigned int) -1)
1592 rel_hdr->sh_type = use_rela_p ? SHT_RELA : SHT_REL;
1593 rel_hdr->sh_entsize = (use_rela_p
1594 ? bed->s->sizeof_rela
1595 : bed->s->sizeof_rel);
1596 rel_hdr->sh_addralign = bed->s->file_align;
1597 rel_hdr->sh_flags = 0;
1598 rel_hdr->sh_addr = 0;
1599 rel_hdr->sh_size = 0;
1600 rel_hdr->sh_offset = 0;
1605 /* Set up an ELF internal section header for a section. */
1609 elf_fake_sections (abfd, asect, failedptrarg)
1614 struct elf_backend_data *bed = get_elf_backend_data (abfd);
1615 boolean *failedptr = (boolean *) failedptrarg;
1616 Elf_Internal_Shdr *this_hdr;
1620 /* We already failed; just get out of the bfd_map_over_sections
1625 this_hdr = &elf_section_data (asect)->this_hdr;
1627 this_hdr->sh_name = (unsigned long) _bfd_stringtab_add (elf_shstrtab (abfd),
1630 if (this_hdr->sh_name == (unsigned long) -1)
1636 this_hdr->sh_flags = 0;
1638 if ((asect->flags & SEC_ALLOC) != 0
1639 || asect->user_set_vma)
1640 this_hdr->sh_addr = asect->vma;
1642 this_hdr->sh_addr = 0;
1644 this_hdr->sh_offset = 0;
1645 this_hdr->sh_size = asect->_raw_size;
1646 this_hdr->sh_link = 0;
1647 this_hdr->sh_addralign = 1 << asect->alignment_power;
1648 /* The sh_entsize and sh_info fields may have been set already by
1649 copy_private_section_data. */
1651 this_hdr->bfd_section = asect;
1652 this_hdr->contents = NULL;
1654 /* FIXME: This should not be based on section names. */
1655 if (strcmp (asect->name, ".dynstr") == 0)
1656 this_hdr->sh_type = SHT_STRTAB;
1657 else if (strcmp (asect->name, ".hash") == 0)
1659 this_hdr->sh_type = SHT_HASH;
1660 this_hdr->sh_entsize = bed->s->sizeof_hash_entry;
1662 else if (strcmp (asect->name, ".dynsym") == 0)
1664 this_hdr->sh_type = SHT_DYNSYM;
1665 this_hdr->sh_entsize = bed->s->sizeof_sym;
1667 else if (strcmp (asect->name, ".dynamic") == 0)
1669 this_hdr->sh_type = SHT_DYNAMIC;
1670 this_hdr->sh_entsize = bed->s->sizeof_dyn;
1672 else if (strncmp (asect->name, ".rela", 5) == 0
1673 && get_elf_backend_data (abfd)->may_use_rela_p)
1675 this_hdr->sh_type = SHT_RELA;
1676 this_hdr->sh_entsize = bed->s->sizeof_rela;
1678 else if (strncmp (asect->name, ".rel", 4) == 0
1679 && get_elf_backend_data (abfd)->may_use_rel_p)
1681 this_hdr->sh_type = SHT_REL;
1682 this_hdr->sh_entsize = bed->s->sizeof_rel;
1684 else if (strncmp (asect->name, ".note", 5) == 0)
1685 this_hdr->sh_type = SHT_NOTE;
1686 else if (strncmp (asect->name, ".stab", 5) == 0
1687 && strcmp (asect->name + strlen (asect->name) - 3, "str") == 0)
1688 this_hdr->sh_type = SHT_STRTAB;
1689 else if (strcmp (asect->name, ".gnu.version") == 0)
1691 this_hdr->sh_type = SHT_GNU_versym;
1692 this_hdr->sh_entsize = sizeof (Elf_External_Versym);
1694 else if (strcmp (asect->name, ".gnu.version_d") == 0)
1696 this_hdr->sh_type = SHT_GNU_verdef;
1697 this_hdr->sh_entsize = 0;
1698 /* objcopy or strip will copy over sh_info, but may not set
1699 cverdefs. The linker will set cverdefs, but sh_info will be
1701 if (this_hdr->sh_info == 0)
1702 this_hdr->sh_info = elf_tdata (abfd)->cverdefs;
1704 BFD_ASSERT (elf_tdata (abfd)->cverdefs == 0
1705 || this_hdr->sh_info == elf_tdata (abfd)->cverdefs);
1707 else if (strcmp (asect->name, ".gnu.version_r") == 0)
1709 this_hdr->sh_type = SHT_GNU_verneed;
1710 this_hdr->sh_entsize = 0;
1711 /* objcopy or strip will copy over sh_info, but may not set
1712 cverrefs. The linker will set cverrefs, but sh_info will be
1714 if (this_hdr->sh_info == 0)
1715 this_hdr->sh_info = elf_tdata (abfd)->cverrefs;
1717 BFD_ASSERT (elf_tdata (abfd)->cverrefs == 0
1718 || this_hdr->sh_info == elf_tdata (abfd)->cverrefs);
1720 else if ((asect->flags & SEC_ALLOC) != 0
1721 && (asect->flags & SEC_LOAD) != 0)
1722 this_hdr->sh_type = SHT_PROGBITS;
1723 else if ((asect->flags & SEC_ALLOC) != 0
1724 && ((asect->flags & SEC_LOAD) == 0))
1725 this_hdr->sh_type = SHT_NOBITS;
1729 this_hdr->sh_type = SHT_PROGBITS;
1732 if ((asect->flags & SEC_ALLOC) != 0)
1733 this_hdr->sh_flags |= SHF_ALLOC;
1734 if ((asect->flags & SEC_READONLY) == 0)
1735 this_hdr->sh_flags |= SHF_WRITE;
1736 if ((asect->flags & SEC_CODE) != 0)
1737 this_hdr->sh_flags |= SHF_EXECINSTR;
1739 /* Check for processor-specific section types. */
1740 if (bed->elf_backend_fake_sections)
1741 (*bed->elf_backend_fake_sections) (abfd, this_hdr, asect);
1743 /* If the section has relocs, set up a section header for the
1744 SHT_REL[A] section. If two relocation sections are required for
1745 this section, it is up to the processor-specific back-end to
1746 create the other. */
1747 if ((asect->flags & SEC_RELOC) != 0
1748 && !_bfd_elf_init_reloc_shdr (abfd,
1749 &elf_section_data (asect)->rel_hdr,
1751 elf_section_data (asect)->use_rela_p))
1755 /* Assign all ELF section numbers. The dummy first section is handled here
1756 too. The link/info pointers for the standard section types are filled
1757 in here too, while we're at it. */
1760 assign_section_numbers (abfd)
1763 struct elf_obj_tdata *t = elf_tdata (abfd);
1765 unsigned int section_number;
1766 Elf_Internal_Shdr **i_shdrp;
1767 struct elf_backend_data *bed = get_elf_backend_data (abfd);
1771 for (sec = abfd->sections; sec; sec = sec->next)
1773 struct bfd_elf_section_data *d = elf_section_data (sec);
1775 d->this_idx = section_number++;
1776 if ((sec->flags & SEC_RELOC) == 0)
1779 d->rel_idx = section_number++;
1782 d->rel_idx2 = section_number++;
1787 t->shstrtab_section = section_number++;
1788 elf_elfheader (abfd)->e_shstrndx = t->shstrtab_section;
1789 t->shstrtab_hdr.sh_size = _bfd_stringtab_size (elf_shstrtab (abfd));
1791 if (bfd_get_symcount (abfd) > 0)
1793 t->symtab_section = section_number++;
1794 t->strtab_section = section_number++;
1797 elf_elfheader (abfd)->e_shnum = section_number;
1799 /* Set up the list of section header pointers, in agreement with the
1801 i_shdrp = ((Elf_Internal_Shdr **)
1802 bfd_alloc (abfd, section_number * sizeof (Elf_Internal_Shdr *)));
1803 if (i_shdrp == NULL)
1806 i_shdrp[0] = ((Elf_Internal_Shdr *)
1807 bfd_alloc (abfd, sizeof (Elf_Internal_Shdr)));
1808 if (i_shdrp[0] == NULL)
1810 bfd_release (abfd, i_shdrp);
1813 memset (i_shdrp[0], 0, sizeof (Elf_Internal_Shdr));
1815 elf_elfsections (abfd) = i_shdrp;
1817 i_shdrp[t->shstrtab_section] = &t->shstrtab_hdr;
1818 if (bfd_get_symcount (abfd) > 0)
1820 i_shdrp[t->symtab_section] = &t->symtab_hdr;
1821 i_shdrp[t->strtab_section] = &t->strtab_hdr;
1822 t->symtab_hdr.sh_link = t->strtab_section;
1824 for (sec = abfd->sections; sec; sec = sec->next)
1826 struct bfd_elf_section_data *d = elf_section_data (sec);
1830 i_shdrp[d->this_idx] = &d->this_hdr;
1831 if (d->rel_idx != 0)
1832 i_shdrp[d->rel_idx] = &d->rel_hdr;
1833 if (d->rel_idx2 != 0)
1834 i_shdrp[d->rel_idx2] = d->rel_hdr2;
1836 /* Fill in the sh_link and sh_info fields while we're at it. */
1838 /* sh_link of a reloc section is the section index of the symbol
1839 table. sh_info is the section index of the section to which
1840 the relocation entries apply. */
1841 if (d->rel_idx != 0)
1843 d->rel_hdr.sh_link = t->symtab_section;
1844 d->rel_hdr.sh_info = d->this_idx;
1846 if (d->rel_idx2 != 0)
1848 d->rel_hdr2->sh_link = t->symtab_section;
1849 d->rel_hdr2->sh_info = d->this_idx;
1852 switch (d->this_hdr.sh_type)
1856 /* A reloc section which we are treating as a normal BFD
1857 section. sh_link is the section index of the symbol
1858 table. sh_info is the section index of the section to
1859 which the relocation entries apply. We assume that an
1860 allocated reloc section uses the dynamic symbol table.
1861 FIXME: How can we be sure? */
1862 s = bfd_get_section_by_name (abfd, ".dynsym");
1864 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
1866 /* We look up the section the relocs apply to by name. */
1868 if (d->this_hdr.sh_type == SHT_REL)
1872 s = bfd_get_section_by_name (abfd, name);
1874 d->this_hdr.sh_info = elf_section_data (s)->this_idx;
1878 /* We assume that a section named .stab*str is a stabs
1879 string section. We look for a section with the same name
1880 but without the trailing ``str'', and set its sh_link
1881 field to point to this section. */
1882 if (strncmp (sec->name, ".stab", sizeof ".stab" - 1) == 0
1883 && strcmp (sec->name + strlen (sec->name) - 3, "str") == 0)
1888 len = strlen (sec->name);
1889 alc = (char *) bfd_malloc (len - 2);
1892 strncpy (alc, sec->name, len - 3);
1893 alc[len - 3] = '\0';
1894 s = bfd_get_section_by_name (abfd, alc);
1898 elf_section_data (s)->this_hdr.sh_link = d->this_idx;
1900 /* This is a .stab section. */
1901 elf_section_data (s)->this_hdr.sh_entsize =
1902 4 + 2 * (bed->s->arch_size / 8);
1909 case SHT_GNU_verneed:
1910 case SHT_GNU_verdef:
1911 /* sh_link is the section header index of the string table
1912 used for the dynamic entries, or the symbol table, or the
1914 s = bfd_get_section_by_name (abfd, ".dynstr");
1916 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
1920 case SHT_GNU_versym:
1921 /* sh_link is the section header index of the symbol table
1922 this hash table or version table is for. */
1923 s = bfd_get_section_by_name (abfd, ".dynsym");
1925 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
1933 /* Map symbol from it's internal number to the external number, moving
1934 all local symbols to be at the head of the list. */
1937 sym_is_global (abfd, sym)
1941 /* If the backend has a special mapping, use it. */
1942 if (get_elf_backend_data (abfd)->elf_backend_sym_is_global)
1943 return ((*get_elf_backend_data (abfd)->elf_backend_sym_is_global)
1946 return ((sym->flags & (BSF_GLOBAL | BSF_WEAK)) != 0
1947 || bfd_is_und_section (bfd_get_section (sym))
1948 || bfd_is_com_section (bfd_get_section (sym)));
1952 elf_map_symbols (abfd)
1955 int symcount = bfd_get_symcount (abfd);
1956 asymbol **syms = bfd_get_outsymbols (abfd);
1957 asymbol **sect_syms;
1959 int num_globals = 0;
1960 int num_locals2 = 0;
1961 int num_globals2 = 0;
1963 int num_sections = 0;
1970 fprintf (stderr, "elf_map_symbols\n");
1974 /* Add a section symbol for each BFD section. FIXME: Is this really
1976 for (asect = abfd->sections; asect; asect = asect->next)
1978 if (max_index < asect->index)
1979 max_index = asect->index;
1983 sect_syms = (asymbol **) bfd_zalloc (abfd, max_index * sizeof (asymbol *));
1984 if (sect_syms == NULL)
1986 elf_section_syms (abfd) = sect_syms;
1988 for (idx = 0; idx < symcount; idx++)
1992 if ((sym->flags & BSF_SECTION_SYM) != 0
1999 if (sec->owner != NULL)
2001 if (sec->owner != abfd)
2003 if (sec->output_offset != 0)
2006 sec = sec->output_section;
2008 /* Empty sections in the input files may have had a section
2009 symbol created for them. (See the comment near the end of
2010 _bfd_generic_link_output_symbols in linker.c). If the linker
2011 script discards such sections then we will reach this point.
2012 Since we know that we cannot avoid this case, we detect it
2013 and skip the abort and the assignment to the sect_syms array.
2014 To reproduce this particular case try running the linker
2015 testsuite test ld-scripts/weak.exp for an ELF port that uses
2016 the generic linker. */
2017 if (sec->owner == NULL)
2020 BFD_ASSERT (sec->owner == abfd);
2022 sect_syms[sec->index] = syms[idx];
2027 for (asect = abfd->sections; asect; asect = asect->next)
2029 if (sect_syms[asect->index] != NULL)
2032 sym = bfd_make_empty_symbol (abfd);
2035 sym->the_bfd = abfd;
2036 sym->name = asect->name;
2038 /* Set the flags to 0 to indicate that this one was newly added. */
2040 sym->section = asect;
2041 sect_syms[asect->index] = sym;
2045 _("creating section symbol, name = %s, value = 0x%.8lx, index = %d, section = 0x%.8lx\n"),
2046 asect->name, (long) asect->vma, asect->index, (long) asect);
2050 /* Classify all of the symbols. */
2051 for (idx = 0; idx < symcount; idx++)
2053 if (!sym_is_global (abfd, syms[idx]))
2058 for (asect = abfd->sections; asect; asect = asect->next)
2060 if (sect_syms[asect->index] != NULL
2061 && sect_syms[asect->index]->flags == 0)
2063 sect_syms[asect->index]->flags = BSF_SECTION_SYM;
2064 if (!sym_is_global (abfd, sect_syms[asect->index]))
2068 sect_syms[asect->index]->flags = 0;
2072 /* Now sort the symbols so the local symbols are first. */
2073 new_syms = ((asymbol **)
2075 (num_locals + num_globals) * sizeof (asymbol *)));
2076 if (new_syms == NULL)
2079 for (idx = 0; idx < symcount; idx++)
2081 asymbol *sym = syms[idx];
2084 if (!sym_is_global (abfd, sym))
2087 i = num_locals + num_globals2++;
2089 sym->udata.i = i + 1;
2091 for (asect = abfd->sections; asect; asect = asect->next)
2093 if (sect_syms[asect->index] != NULL
2094 && sect_syms[asect->index]->flags == 0)
2096 asymbol *sym = sect_syms[asect->index];
2099 sym->flags = BSF_SECTION_SYM;
2100 if (!sym_is_global (abfd, sym))
2103 i = num_locals + num_globals2++;
2105 sym->udata.i = i + 1;
2109 bfd_set_symtab (abfd, new_syms, num_locals + num_globals);
2111 elf_num_locals (abfd) = num_locals;
2112 elf_num_globals (abfd) = num_globals;
2116 /* Align to the maximum file alignment that could be required for any
2117 ELF data structure. */
2119 static INLINE file_ptr align_file_position PARAMS ((file_ptr, int));
2120 static INLINE file_ptr
2121 align_file_position (off, align)
2125 return (off + align - 1) & ~(align - 1);
2128 /* Assign a file position to a section, optionally aligning to the
2129 required section alignment. */
2132 _bfd_elf_assign_file_position_for_section (i_shdrp, offset, align)
2133 Elf_Internal_Shdr *i_shdrp;
2141 al = i_shdrp->sh_addralign;
2143 offset = BFD_ALIGN (offset, al);
2145 i_shdrp->sh_offset = offset;
2146 if (i_shdrp->bfd_section != NULL)
2147 i_shdrp->bfd_section->filepos = offset;
2148 if (i_shdrp->sh_type != SHT_NOBITS)
2149 offset += i_shdrp->sh_size;
2153 /* Compute the file positions we are going to put the sections at, and
2154 otherwise prepare to begin writing out the ELF file. If LINK_INFO
2155 is not NULL, this is being called by the ELF backend linker. */
2158 _bfd_elf_compute_section_file_positions (abfd, link_info)
2160 struct bfd_link_info *link_info;
2162 struct elf_backend_data *bed = get_elf_backend_data (abfd);
2164 struct bfd_strtab_hash *strtab;
2165 Elf_Internal_Shdr *shstrtab_hdr;
2167 if (abfd->output_has_begun)
2170 /* Do any elf backend specific processing first. */
2171 if (bed->elf_backend_begin_write_processing)
2172 (*bed->elf_backend_begin_write_processing) (abfd, link_info);
2174 if (! prep_headers (abfd))
2177 /* Post process the headers if necessary. */
2178 if (bed->elf_backend_post_process_headers)
2179 (*bed->elf_backend_post_process_headers) (abfd, link_info);
2182 bfd_map_over_sections (abfd, elf_fake_sections, &failed);
2186 if (!assign_section_numbers (abfd))
2189 /* The backend linker builds symbol table information itself. */
2190 if (link_info == NULL && bfd_get_symcount (abfd) > 0)
2192 /* Non-zero if doing a relocatable link. */
2193 int relocatable_p = ! (abfd->flags & (EXEC_P | DYNAMIC));
2195 if (! swap_out_syms (abfd, &strtab, relocatable_p))
2199 shstrtab_hdr = &elf_tdata (abfd)->shstrtab_hdr;
2200 /* sh_name was set in prep_headers. */
2201 shstrtab_hdr->sh_type = SHT_STRTAB;
2202 shstrtab_hdr->sh_flags = 0;
2203 shstrtab_hdr->sh_addr = 0;
2204 shstrtab_hdr->sh_size = _bfd_stringtab_size (elf_shstrtab (abfd));
2205 shstrtab_hdr->sh_entsize = 0;
2206 shstrtab_hdr->sh_link = 0;
2207 shstrtab_hdr->sh_info = 0;
2208 /* sh_offset is set in assign_file_positions_except_relocs. */
2209 shstrtab_hdr->sh_addralign = 1;
2211 if (!assign_file_positions_except_relocs (abfd))
2214 if (link_info == NULL && bfd_get_symcount (abfd) > 0)
2217 Elf_Internal_Shdr *hdr;
2219 off = elf_tdata (abfd)->next_file_pos;
2221 hdr = &elf_tdata (abfd)->symtab_hdr;
2222 off = _bfd_elf_assign_file_position_for_section (hdr, off, true);
2224 hdr = &elf_tdata (abfd)->strtab_hdr;
2225 off = _bfd_elf_assign_file_position_for_section (hdr, off, true);
2227 elf_tdata (abfd)->next_file_pos = off;
2229 /* Now that we know where the .strtab section goes, write it
2231 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
2232 || ! _bfd_stringtab_emit (abfd, strtab))
2234 _bfd_stringtab_free (strtab);
2237 abfd->output_has_begun = true;
2242 /* Create a mapping from a set of sections to a program segment. */
2244 static INLINE struct elf_segment_map *
2245 make_mapping (abfd, sections, from, to, phdr)
2247 asection **sections;
2252 struct elf_segment_map *m;
2256 m = ((struct elf_segment_map *)
2258 (sizeof (struct elf_segment_map)
2259 + (to - from - 1) * sizeof (asection *))));
2263 m->p_type = PT_LOAD;
2264 for (i = from, hdrpp = sections + from; i < to; i++, hdrpp++)
2265 m->sections[i - from] = *hdrpp;
2266 m->count = to - from;
2268 if (from == 0 && phdr)
2270 /* Include the headers in the first PT_LOAD segment. */
2271 m->includes_filehdr = 1;
2272 m->includes_phdrs = 1;
2278 /* Set up a mapping from BFD sections to program segments. */
2281 map_sections_to_segments (abfd)
2284 asection **sections = NULL;
2288 struct elf_segment_map *mfirst;
2289 struct elf_segment_map **pm;
2290 struct elf_segment_map *m;
2292 unsigned int phdr_index;
2293 bfd_vma maxpagesize;
2295 boolean phdr_in_segment = true;
2299 if (elf_tdata (abfd)->segment_map != NULL)
2302 if (bfd_count_sections (abfd) == 0)
2305 /* Select the allocated sections, and sort them. */
2307 sections = (asection **) bfd_malloc (bfd_count_sections (abfd)
2308 * sizeof (asection *));
2309 if (sections == NULL)
2313 for (s = abfd->sections; s != NULL; s = s->next)
2315 if ((s->flags & SEC_ALLOC) != 0)
2321 BFD_ASSERT (i <= bfd_count_sections (abfd));
2324 qsort (sections, (size_t) count, sizeof (asection *), elf_sort_sections);
2326 /* Build the mapping. */
2331 /* If we have a .interp section, then create a PT_PHDR segment for
2332 the program headers and a PT_INTERP segment for the .interp
2334 s = bfd_get_section_by_name (abfd, ".interp");
2335 if (s != NULL && (s->flags & SEC_LOAD) != 0)
2337 m = ((struct elf_segment_map *)
2338 bfd_zalloc (abfd, sizeof (struct elf_segment_map)));
2342 m->p_type = PT_PHDR;
2343 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
2344 m->p_flags = PF_R | PF_X;
2345 m->p_flags_valid = 1;
2346 m->includes_phdrs = 1;
2351 m = ((struct elf_segment_map *)
2352 bfd_zalloc (abfd, sizeof (struct elf_segment_map)));
2356 m->p_type = PT_INTERP;
2364 /* Look through the sections. We put sections in the same program
2365 segment when the start of the second section can be placed within
2366 a few bytes of the end of the first section. */
2369 maxpagesize = get_elf_backend_data (abfd)->maxpagesize;
2371 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
2373 && (dynsec->flags & SEC_LOAD) == 0)
2376 /* Deal with -Ttext or something similar such that the first section
2377 is not adjacent to the program headers. This is an
2378 approximation, since at this point we don't know exactly how many
2379 program headers we will need. */
2382 bfd_size_type phdr_size;
2384 phdr_size = elf_tdata (abfd)->program_header_size;
2386 phdr_size = get_elf_backend_data (abfd)->s->sizeof_phdr;
2387 if ((abfd->flags & D_PAGED) == 0
2388 || sections[0]->lma < phdr_size
2389 || sections[0]->lma % maxpagesize < phdr_size % maxpagesize)
2390 phdr_in_segment = false;
2393 for (i = 0, hdrpp = sections; i < count; i++, hdrpp++)
2396 boolean new_segment;
2400 /* See if this section and the last one will fit in the same
2403 if (last_hdr == NULL)
2405 /* If we don't have a segment yet, then we don't need a new
2406 one (we build the last one after this loop). */
2407 new_segment = false;
2409 else if (last_hdr->lma - last_hdr->vma != hdr->lma - hdr->vma)
2411 /* If this section has a different relation between the
2412 virtual address and the load address, then we need a new
2416 else if (BFD_ALIGN (last_hdr->lma + last_hdr->_raw_size, maxpagesize)
2417 < BFD_ALIGN (hdr->lma, maxpagesize))
2419 /* If putting this section in this segment would force us to
2420 skip a page in the segment, then we need a new segment. */
2423 else if ((last_hdr->flags & SEC_LOAD) == 0
2424 && (hdr->flags & SEC_LOAD) != 0)
2426 /* We don't want to put a loadable section after a
2427 nonloadable section in the same segment. */
2430 else if ((abfd->flags & D_PAGED) == 0)
2432 /* If the file is not demand paged, which means that we
2433 don't require the sections to be correctly aligned in the
2434 file, then there is no other reason for a new segment. */
2435 new_segment = false;
2438 && (hdr->flags & SEC_READONLY) == 0
2439 && (BFD_ALIGN (last_hdr->lma + last_hdr->_raw_size, maxpagesize)
2442 /* We don't want to put a writable section in a read only
2443 segment, unless they are on the same page in memory
2444 anyhow. We already know that the last section does not
2445 bring us past the current section on the page, so the
2446 only case in which the new section is not on the same
2447 page as the previous section is when the previous section
2448 ends precisely on a page boundary. */
2453 /* Otherwise, we can use the same segment. */
2454 new_segment = false;
2459 if ((hdr->flags & SEC_READONLY) == 0)
2465 /* We need a new program segment. We must create a new program
2466 header holding all the sections from phdr_index until hdr. */
2468 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
2475 if ((hdr->flags & SEC_READONLY) == 0)
2482 phdr_in_segment = false;
2485 /* Create a final PT_LOAD program segment. */
2486 if (last_hdr != NULL)
2488 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
2496 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
2499 m = ((struct elf_segment_map *)
2500 bfd_zalloc (abfd, sizeof (struct elf_segment_map)));
2504 m->p_type = PT_DYNAMIC;
2506 m->sections[0] = dynsec;
2512 /* For each loadable .note section, add a PT_NOTE segment. We don't
2513 use bfd_get_section_by_name, because if we link together
2514 nonloadable .note sections and loadable .note sections, we will
2515 generate two .note sections in the output file. FIXME: Using
2516 names for section types is bogus anyhow. */
2517 for (s = abfd->sections; s != NULL; s = s->next)
2519 if ((s->flags & SEC_LOAD) != 0
2520 && strncmp (s->name, ".note", 5) == 0)
2522 m = ((struct elf_segment_map *)
2523 bfd_zalloc (abfd, sizeof (struct elf_segment_map)));
2527 m->p_type = PT_NOTE;
2539 elf_tdata (abfd)->segment_map = mfirst;
2543 if (sections != NULL)
2548 /* Sort sections by address. */
2551 elf_sort_sections (arg1, arg2)
2555 const asection *sec1 = *(const asection **) arg1;
2556 const asection *sec2 = *(const asection **) arg2;
2558 /* Sort by LMA first, since this is the address used to
2559 place the section into a segment. */
2560 if (sec1->lma < sec2->lma)
2562 else if (sec1->lma > sec2->lma)
2565 /* Then sort by VMA. Normally the LMA and the VMA will be
2566 the same, and this will do nothing. */
2567 if (sec1->vma < sec2->vma)
2569 else if (sec1->vma > sec2->vma)
2572 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
2574 #define TOEND(x) (((x)->flags & SEC_LOAD) == 0)
2579 return sec1->target_index - sec2->target_index;
2589 /* Sort by size, to put zero sized sections before others at the
2592 if (sec1->_raw_size < sec2->_raw_size)
2594 if (sec1->_raw_size > sec2->_raw_size)
2597 return sec1->target_index - sec2->target_index;
2600 /* Assign file positions to the sections based on the mapping from
2601 sections to segments. This function also sets up some fields in
2602 the file header, and writes out the program headers. */
2605 assign_file_positions_for_segments (abfd)
2608 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2610 struct elf_segment_map *m;
2612 Elf_Internal_Phdr *phdrs;
2614 bfd_vma filehdr_vaddr, filehdr_paddr;
2615 bfd_vma phdrs_vaddr, phdrs_paddr;
2616 Elf_Internal_Phdr *p;
2618 if (elf_tdata (abfd)->segment_map == NULL)
2620 if (! map_sections_to_segments (abfd))
2624 if (bed->elf_backend_modify_segment_map)
2626 if (! (*bed->elf_backend_modify_segment_map) (abfd))
2631 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
2634 elf_elfheader (abfd)->e_phoff = bed->s->sizeof_ehdr;
2635 elf_elfheader (abfd)->e_phentsize = bed->s->sizeof_phdr;
2636 elf_elfheader (abfd)->e_phnum = count;
2641 /* If we already counted the number of program segments, make sure
2642 that we allocated enough space. This happens when SIZEOF_HEADERS
2643 is used in a linker script. */
2644 alloc = elf_tdata (abfd)->program_header_size / bed->s->sizeof_phdr;
2645 if (alloc != 0 && count > alloc)
2647 ((*_bfd_error_handler)
2648 (_("%s: Not enough room for program headers (allocated %u, need %u)"),
2649 bfd_get_filename (abfd), alloc, count));
2650 bfd_set_error (bfd_error_bad_value);
2657 phdrs = ((Elf_Internal_Phdr *)
2658 bfd_alloc (abfd, alloc * sizeof (Elf_Internal_Phdr)));
2662 off = bed->s->sizeof_ehdr;
2663 off += alloc * bed->s->sizeof_phdr;
2670 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
2677 /* If elf_segment_map is not from map_sections_to_segments, the
2678 sections may not be correctly ordered. */
2680 qsort (m->sections, (size_t) m->count, sizeof (asection *),
2683 p->p_type = m->p_type;
2684 p->p_flags = m->p_flags;
2686 if (p->p_type == PT_LOAD
2688 && (m->sections[0]->flags & SEC_ALLOC) != 0)
2690 if ((abfd->flags & D_PAGED) != 0)
2691 off += (m->sections[0]->vma - off) % bed->maxpagesize;
2694 bfd_size_type align;
2697 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
2699 bfd_size_type secalign;
2701 secalign = bfd_get_section_alignment (abfd, *secpp);
2702 if (secalign > align)
2706 off += (m->sections[0]->vma - off) % (1 << align);
2713 p->p_vaddr = m->sections[0]->vma;
2715 if (m->p_paddr_valid)
2716 p->p_paddr = m->p_paddr;
2717 else if (m->count == 0)
2720 p->p_paddr = m->sections[0]->lma;
2722 if (p->p_type == PT_LOAD
2723 && (abfd->flags & D_PAGED) != 0)
2724 p->p_align = bed->maxpagesize;
2725 else if (m->count == 0)
2726 p->p_align = bed->s->file_align;
2734 if (m->includes_filehdr)
2736 if (! m->p_flags_valid)
2739 p->p_filesz = bed->s->sizeof_ehdr;
2740 p->p_memsz = bed->s->sizeof_ehdr;
2743 BFD_ASSERT (p->p_type == PT_LOAD);
2745 if (p->p_vaddr < (bfd_vma) off)
2747 _bfd_error_handler (_("%s: Not enough room for program headers, try linking with -N"),
2748 bfd_get_filename (abfd));
2749 bfd_set_error (bfd_error_bad_value);
2754 if (! m->p_paddr_valid)
2757 if (p->p_type == PT_LOAD)
2759 filehdr_vaddr = p->p_vaddr;
2760 filehdr_paddr = p->p_paddr;
2764 if (m->includes_phdrs)
2766 if (! m->p_flags_valid)
2769 if (m->includes_filehdr)
2771 if (p->p_type == PT_LOAD)
2773 phdrs_vaddr = p->p_vaddr + bed->s->sizeof_ehdr;
2774 phdrs_paddr = p->p_paddr + bed->s->sizeof_ehdr;
2779 p->p_offset = bed->s->sizeof_ehdr;
2783 BFD_ASSERT (p->p_type == PT_LOAD);
2784 p->p_vaddr -= off - p->p_offset;
2785 if (! m->p_paddr_valid)
2786 p->p_paddr -= off - p->p_offset;
2789 if (p->p_type == PT_LOAD)
2791 phdrs_vaddr = p->p_vaddr;
2792 phdrs_paddr = p->p_paddr;
2795 phdrs_vaddr = bed->maxpagesize + bed->s->sizeof_ehdr;
2798 p->p_filesz += alloc * bed->s->sizeof_phdr;
2799 p->p_memsz += alloc * bed->s->sizeof_phdr;
2802 if (p->p_type == PT_LOAD
2803 || (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core))
2805 if (! m->includes_filehdr && ! m->includes_phdrs)
2811 adjust = off - (p->p_offset + p->p_filesz);
2812 p->p_filesz += adjust;
2813 p->p_memsz += adjust;
2819 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
2823 bfd_size_type align;
2827 align = 1 << bfd_get_section_alignment (abfd, sec);
2829 /* The section may have artificial alignment forced by a
2830 link script. Notice this case by the gap between the
2831 cumulative phdr vma and the section's vma. */
2832 if (p->p_vaddr + p->p_memsz < sec->vma)
2834 bfd_vma adjust = sec->vma - (p->p_vaddr + p->p_memsz);
2836 p->p_memsz += adjust;
2839 if ((flags & SEC_LOAD) != 0)
2840 p->p_filesz += adjust;
2843 if (p->p_type == PT_LOAD)
2845 bfd_signed_vma adjust;
2847 if ((flags & SEC_LOAD) != 0)
2849 adjust = sec->lma - (p->p_paddr + p->p_memsz);
2853 else if ((flags & SEC_ALLOC) != 0)
2855 /* The section VMA must equal the file position
2856 modulo the page size. FIXME: I'm not sure if
2857 this adjustment is really necessary. We used to
2858 not have the SEC_LOAD case just above, and then
2859 this was necessary, but now I'm not sure. */
2860 if ((abfd->flags & D_PAGED) != 0)
2861 adjust = (sec->vma - voff) % bed->maxpagesize;
2863 adjust = (sec->vma - voff) % align;
2872 (* _bfd_error_handler)
2873 (_("Error: First section in segment (%s) starts at 0x%x"),
2874 bfd_section_name (abfd, sec), sec->lma);
2875 (* _bfd_error_handler)
2876 (_(" whereas segment starts at 0x%x"),
2881 p->p_memsz += adjust;
2884 if ((flags & SEC_LOAD) != 0)
2885 p->p_filesz += adjust;
2890 /* We check SEC_HAS_CONTENTS here because if NOLOAD is
2891 used in a linker script we may have a section with
2892 SEC_LOAD clear but which is supposed to have
2894 if ((flags & SEC_LOAD) != 0
2895 || (flags & SEC_HAS_CONTENTS) != 0)
2896 off += sec->_raw_size;
2898 if ((flags & SEC_ALLOC) != 0)
2899 voff += sec->_raw_size;
2902 if (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core)
2904 if (i == 0) /* the actual "note" segment */
2905 { /* this one actually contains everything. */
2907 p->p_filesz = sec->_raw_size;
2908 off += sec->_raw_size;
2911 else /* fake sections -- don't need to be written */
2915 flags = sec->flags = 0; /* no contents */
2922 p->p_memsz += sec->_raw_size;
2924 if ((flags & SEC_LOAD) != 0)
2925 p->p_filesz += sec->_raw_size;
2927 if (align > p->p_align
2928 && (p->p_type != PT_LOAD || (abfd->flags & D_PAGED) == 0))
2932 if (! m->p_flags_valid)
2935 if ((flags & SEC_CODE) != 0)
2937 if ((flags & SEC_READONLY) == 0)
2943 /* Now that we have set the section file positions, we can set up
2944 the file positions for the non PT_LOAD segments. */
2945 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
2949 if (p->p_type != PT_LOAD && m->count > 0)
2951 BFD_ASSERT (! m->includes_filehdr && ! m->includes_phdrs);
2952 p->p_offset = m->sections[0]->filepos;
2956 if (m->includes_filehdr)
2958 p->p_vaddr = filehdr_vaddr;
2959 if (! m->p_paddr_valid)
2960 p->p_paddr = filehdr_paddr;
2962 else if (m->includes_phdrs)
2964 p->p_vaddr = phdrs_vaddr;
2965 if (! m->p_paddr_valid)
2966 p->p_paddr = phdrs_paddr;
2971 /* Clear out any program headers we allocated but did not use. */
2972 for (; count < alloc; count++, p++)
2974 memset (p, 0, sizeof *p);
2975 p->p_type = PT_NULL;
2978 elf_tdata (abfd)->phdr = phdrs;
2980 elf_tdata (abfd)->next_file_pos = off;
2982 /* Write out the program headers. */
2983 if (bfd_seek (abfd, bed->s->sizeof_ehdr, SEEK_SET) != 0
2984 || bed->s->write_out_phdrs (abfd, phdrs, alloc) != 0)
2990 /* Get the size of the program header.
2992 If this is called by the linker before any of the section VMA's are set, it
2993 can't calculate the correct value for a strange memory layout. This only
2994 happens when SIZEOF_HEADERS is used in a linker script. In this case,
2995 SORTED_HDRS is NULL and we assume the normal scenario of one text and one
2996 data segment (exclusive of .interp and .dynamic).
2998 ??? User written scripts must either not use SIZEOF_HEADERS, or assume there
2999 will be two segments. */
3001 static bfd_size_type
3002 get_program_header_size (abfd)
3007 struct elf_backend_data *bed = get_elf_backend_data (abfd);
3009 /* We can't return a different result each time we're called. */
3010 if (elf_tdata (abfd)->program_header_size != 0)
3011 return elf_tdata (abfd)->program_header_size;
3013 if (elf_tdata (abfd)->segment_map != NULL)
3015 struct elf_segment_map *m;
3018 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
3020 elf_tdata (abfd)->program_header_size = segs * bed->s->sizeof_phdr;
3021 return elf_tdata (abfd)->program_header_size;
3024 /* Assume we will need exactly two PT_LOAD segments: one for text
3025 and one for data. */
3028 s = bfd_get_section_by_name (abfd, ".interp");
3029 if (s != NULL && (s->flags & SEC_LOAD) != 0)
3031 /* If we have a loadable interpreter section, we need a
3032 PT_INTERP segment. In this case, assume we also need a
3033 PT_PHDR segment, although that may not be true for all
3038 if (bfd_get_section_by_name (abfd, ".dynamic") != NULL)
3040 /* We need a PT_DYNAMIC segment. */
3044 for (s = abfd->sections; s != NULL; s = s->next)
3046 if ((s->flags & SEC_LOAD) != 0
3047 && strncmp (s->name, ".note", 5) == 0)
3049 /* We need a PT_NOTE segment. */
3054 /* Let the backend count up any program headers it might need. */
3055 if (bed->elf_backend_additional_program_headers)
3059 a = (*bed->elf_backend_additional_program_headers) (abfd);
3065 elf_tdata (abfd)->program_header_size = segs * bed->s->sizeof_phdr;
3066 return elf_tdata (abfd)->program_header_size;
3069 /* Work out the file positions of all the sections. This is called by
3070 _bfd_elf_compute_section_file_positions. All the section sizes and
3071 VMAs must be known before this is called.
3073 We do not consider reloc sections at this point, unless they form
3074 part of the loadable image. Reloc sections are assigned file
3075 positions in assign_file_positions_for_relocs, which is called by
3076 write_object_contents and final_link.
3078 We also don't set the positions of the .symtab and .strtab here. */
3081 assign_file_positions_except_relocs (abfd)
3084 struct elf_obj_tdata * const tdata = elf_tdata (abfd);
3085 Elf_Internal_Ehdr * const i_ehdrp = elf_elfheader (abfd);
3086 Elf_Internal_Shdr ** const i_shdrpp = elf_elfsections (abfd);
3088 struct elf_backend_data *bed = get_elf_backend_data (abfd);
3090 if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0
3091 && bfd_get_format (abfd) != bfd_core)
3093 Elf_Internal_Shdr **hdrpp;
3096 /* Start after the ELF header. */
3097 off = i_ehdrp->e_ehsize;
3099 /* We are not creating an executable, which means that we are
3100 not creating a program header, and that the actual order of
3101 the sections in the file is unimportant. */
3102 for (i = 1, hdrpp = i_shdrpp + 1; i < i_ehdrp->e_shnum; i++, hdrpp++)
3104 Elf_Internal_Shdr *hdr;
3107 if (hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
3109 hdr->sh_offset = -1;
3112 if (i == tdata->symtab_section
3113 || i == tdata->strtab_section)
3115 hdr->sh_offset = -1;
3119 off = _bfd_elf_assign_file_position_for_section (hdr, off, true);
3125 Elf_Internal_Shdr **hdrpp;
3127 /* Assign file positions for the loaded sections based on the
3128 assignment of sections to segments. */
3129 if (! assign_file_positions_for_segments (abfd))
3132 /* Assign file positions for the other sections. */
3134 off = elf_tdata (abfd)->next_file_pos;
3135 for (i = 1, hdrpp = i_shdrpp + 1; i < i_ehdrp->e_shnum; i++, hdrpp++)
3137 Elf_Internal_Shdr *hdr;
3140 if (hdr->bfd_section != NULL
3141 && hdr->bfd_section->filepos != 0)
3142 hdr->sh_offset = hdr->bfd_section->filepos;
3143 else if ((hdr->sh_flags & SHF_ALLOC) != 0)
3145 ((*_bfd_error_handler)
3146 (_("%s: warning: allocated section `%s' not in segment"),
3147 bfd_get_filename (abfd),
3148 (hdr->bfd_section == NULL
3150 : hdr->bfd_section->name)));
3151 if ((abfd->flags & D_PAGED) != 0)
3152 off += (hdr->sh_addr - off) % bed->maxpagesize;
3154 off += (hdr->sh_addr - off) % hdr->sh_addralign;
3155 off = _bfd_elf_assign_file_position_for_section (hdr, off,
3158 else if (hdr->sh_type == SHT_REL
3159 || hdr->sh_type == SHT_RELA
3160 || hdr == i_shdrpp[tdata->symtab_section]
3161 || hdr == i_shdrpp[tdata->strtab_section])
3162 hdr->sh_offset = -1;
3164 off = _bfd_elf_assign_file_position_for_section (hdr, off, true);
3168 /* Place the section headers. */
3169 off = align_file_position (off, bed->s->file_align);
3170 i_ehdrp->e_shoff = off;
3171 off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize;
3173 elf_tdata (abfd)->next_file_pos = off;
3182 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
3183 Elf_Internal_Phdr *i_phdrp = 0; /* Program header table, internal form */
3184 Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */
3186 struct bfd_strtab_hash *shstrtab;
3187 struct elf_backend_data *bed = get_elf_backend_data (abfd);
3189 i_ehdrp = elf_elfheader (abfd);
3190 i_shdrp = elf_elfsections (abfd);
3192 shstrtab = _bfd_elf_stringtab_init ();
3193 if (shstrtab == NULL)
3196 elf_shstrtab (abfd) = shstrtab;
3198 i_ehdrp->e_ident[EI_MAG0] = ELFMAG0;
3199 i_ehdrp->e_ident[EI_MAG1] = ELFMAG1;
3200 i_ehdrp->e_ident[EI_MAG2] = ELFMAG2;
3201 i_ehdrp->e_ident[EI_MAG3] = ELFMAG3;
3203 i_ehdrp->e_ident[EI_CLASS] = bed->s->elfclass;
3204 i_ehdrp->e_ident[EI_DATA] =
3205 bfd_big_endian (abfd) ? ELFDATA2MSB : ELFDATA2LSB;
3206 i_ehdrp->e_ident[EI_VERSION] = bed->s->ev_current;
3208 i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_SYSV;
3209 i_ehdrp->e_ident[EI_ABIVERSION] = 0;
3211 for (count = EI_PAD; count < EI_NIDENT; count++)
3212 i_ehdrp->e_ident[count] = 0;
3214 if ((abfd->flags & DYNAMIC) != 0)
3215 i_ehdrp->e_type = ET_DYN;
3216 else if ((abfd->flags & EXEC_P) != 0)
3217 i_ehdrp->e_type = ET_EXEC;
3218 else if (bfd_get_format (abfd) == bfd_core)
3219 i_ehdrp->e_type = ET_CORE;
3221 i_ehdrp->e_type = ET_REL;
3223 switch (bfd_get_arch (abfd))
3225 case bfd_arch_unknown:
3226 i_ehdrp->e_machine = EM_NONE;
3228 case bfd_arch_sparc:
3229 if (bed->s->arch_size == 64)
3230 i_ehdrp->e_machine = EM_SPARCV9;
3232 i_ehdrp->e_machine = EM_SPARC;
3235 i_ehdrp->e_machine = EM_386;
3238 i_ehdrp->e_machine = EM_68K;
3241 i_ehdrp->e_machine = EM_88K;
3244 i_ehdrp->e_machine = EM_860;
3247 i_ehdrp->e_machine = EM_960;
3249 case bfd_arch_mips: /* MIPS Rxxxx */
3250 i_ehdrp->e_machine = EM_MIPS; /* only MIPS R3000 */
3253 i_ehdrp->e_machine = EM_PARISC;
3255 case bfd_arch_powerpc:
3256 i_ehdrp->e_machine = EM_PPC;
3258 case bfd_arch_alpha:
3259 i_ehdrp->e_machine = EM_ALPHA;
3262 i_ehdrp->e_machine = EM_SH;
3265 i_ehdrp->e_machine = EM_CYGNUS_D10V;
3268 i_ehdrp->e_machine = EM_CYGNUS_D30V;
3271 i_ehdrp->e_machine = EM_CYGNUS_FR30;
3273 case bfd_arch_mcore:
3274 i_ehdrp->e_machine = EM_MCORE;
3277 switch (bfd_get_mach (abfd))
3280 case 0: i_ehdrp->e_machine = EM_CYGNUS_V850; break;
3284 i_ehdrp->e_machine = EM_CYGNUS_ARC;
3287 i_ehdrp->e_machine = EM_ARM;
3290 i_ehdrp->e_machine = EM_CYGNUS_M32R;
3292 case bfd_arch_mn10200:
3293 i_ehdrp->e_machine = EM_CYGNUS_MN10200;
3295 case bfd_arch_mn10300:
3296 i_ehdrp->e_machine = EM_CYGNUS_MN10300;
3299 i_ehdrp->e_machine = EM_PJ;
3301 /* also note that EM_M32, AT&T WE32100 is unknown to bfd */
3303 i_ehdrp->e_machine = EM_NONE;
3305 i_ehdrp->e_version = bed->s->ev_current;
3306 i_ehdrp->e_ehsize = bed->s->sizeof_ehdr;
3308 /* no program header, for now. */
3309 i_ehdrp->e_phoff = 0;
3310 i_ehdrp->e_phentsize = 0;
3311 i_ehdrp->e_phnum = 0;
3313 /* each bfd section is section header entry */
3314 i_ehdrp->e_entry = bfd_get_start_address (abfd);
3315 i_ehdrp->e_shentsize = bed->s->sizeof_shdr;
3317 /* if we're building an executable, we'll need a program header table */
3318 if (abfd->flags & EXEC_P)
3320 /* it all happens later */
3322 i_ehdrp->e_phentsize = sizeof (Elf_External_Phdr);
3324 /* elf_build_phdrs() returns a (NULL-terminated) array of
3325 Elf_Internal_Phdrs */
3326 i_phdrp = elf_build_phdrs (abfd, i_ehdrp, i_shdrp, &i_ehdrp->e_phnum);
3327 i_ehdrp->e_phoff = outbase;
3328 outbase += i_ehdrp->e_phentsize * i_ehdrp->e_phnum;
3333 i_ehdrp->e_phentsize = 0;
3335 i_ehdrp->e_phoff = 0;
3338 elf_tdata (abfd)->symtab_hdr.sh_name =
3339 (unsigned int) _bfd_stringtab_add (shstrtab, ".symtab", true, false);
3340 elf_tdata (abfd)->strtab_hdr.sh_name =
3341 (unsigned int) _bfd_stringtab_add (shstrtab, ".strtab", true, false);
3342 elf_tdata (abfd)->shstrtab_hdr.sh_name =
3343 (unsigned int) _bfd_stringtab_add (shstrtab, ".shstrtab", true, false);
3344 if (elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
3345 || elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
3346 || elf_tdata (abfd)->shstrtab_hdr.sh_name == (unsigned int) -1)
3352 /* Assign file positions for all the reloc sections which are not part
3353 of the loadable file image. */
3356 _bfd_elf_assign_file_positions_for_relocs (abfd)
3361 Elf_Internal_Shdr **shdrpp;
3363 off = elf_tdata (abfd)->next_file_pos;
3365 for (i = 1, shdrpp = elf_elfsections (abfd) + 1;
3366 i < elf_elfheader (abfd)->e_shnum;
3369 Elf_Internal_Shdr *shdrp;
3372 if ((shdrp->sh_type == SHT_REL || shdrp->sh_type == SHT_RELA)
3373 && shdrp->sh_offset == -1)
3374 off = _bfd_elf_assign_file_position_for_section (shdrp, off, true);
3377 elf_tdata (abfd)->next_file_pos = off;
3381 _bfd_elf_write_object_contents (abfd)
3384 struct elf_backend_data *bed = get_elf_backend_data (abfd);
3385 Elf_Internal_Ehdr *i_ehdrp;
3386 Elf_Internal_Shdr **i_shdrp;
3390 if (! abfd->output_has_begun
3391 && ! _bfd_elf_compute_section_file_positions
3392 (abfd, (struct bfd_link_info *) NULL))
3395 i_shdrp = elf_elfsections (abfd);
3396 i_ehdrp = elf_elfheader (abfd);
3399 bfd_map_over_sections (abfd, bed->s->write_relocs, &failed);
3403 _bfd_elf_assign_file_positions_for_relocs (abfd);
3405 /* After writing the headers, we need to write the sections too... */
3406 for (count = 1; count < i_ehdrp->e_shnum; count++)
3408 if (bed->elf_backend_section_processing)
3409 (*bed->elf_backend_section_processing) (abfd, i_shdrp[count]);
3410 if (i_shdrp[count]->contents)
3412 if (bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET) != 0
3413 || (bfd_write (i_shdrp[count]->contents, i_shdrp[count]->sh_size,
3415 != i_shdrp[count]->sh_size))
3420 /* Write out the section header names. */
3421 if (bfd_seek (abfd, elf_tdata (abfd)->shstrtab_hdr.sh_offset, SEEK_SET) != 0
3422 || ! _bfd_stringtab_emit (abfd, elf_shstrtab (abfd)))
3425 if (bed->elf_backend_final_write_processing)
3426 (*bed->elf_backend_final_write_processing) (abfd,
3427 elf_tdata (abfd)->linker);
3429 return bed->s->write_shdrs_and_ehdr (abfd);
3433 _bfd_elf_write_corefile_contents (abfd)
3436 /* Hopefully this can be done just like an object file. */
3437 return _bfd_elf_write_object_contents (abfd);
3439 /* given a section, search the header to find them... */
3441 _bfd_elf_section_from_bfd_section (abfd, asect)
3445 struct elf_backend_data *bed = get_elf_backend_data (abfd);
3446 Elf_Internal_Shdr **i_shdrp = elf_elfsections (abfd);
3448 Elf_Internal_Shdr *hdr;
3449 int maxindex = elf_elfheader (abfd)->e_shnum;
3451 for (index = 0; index < maxindex; index++)
3453 hdr = i_shdrp[index];
3454 if (hdr->bfd_section == asect)
3458 if (bed->elf_backend_section_from_bfd_section)
3460 for (index = 0; index < maxindex; index++)
3464 hdr = i_shdrp[index];
3466 if ((*bed->elf_backend_section_from_bfd_section)
3467 (abfd, hdr, asect, &retval))
3472 if (bfd_is_abs_section (asect))
3474 if (bfd_is_com_section (asect))
3476 if (bfd_is_und_section (asect))
3479 bfd_set_error (bfd_error_nonrepresentable_section);
3484 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
3488 _bfd_elf_symbol_from_bfd_symbol (abfd, asym_ptr_ptr)
3490 asymbol **asym_ptr_ptr;
3492 asymbol *asym_ptr = *asym_ptr_ptr;
3494 flagword flags = asym_ptr->flags;
3496 /* When gas creates relocations against local labels, it creates its
3497 own symbol for the section, but does put the symbol into the
3498 symbol chain, so udata is 0. When the linker is generating
3499 relocatable output, this section symbol may be for one of the
3500 input sections rather than the output section. */
3501 if (asym_ptr->udata.i == 0
3502 && (flags & BSF_SECTION_SYM)
3503 && asym_ptr->section)
3507 if (asym_ptr->section->output_section != NULL)
3508 indx = asym_ptr->section->output_section->index;
3510 indx = asym_ptr->section->index;
3511 if (elf_section_syms (abfd)[indx])
3512 asym_ptr->udata.i = elf_section_syms (abfd)[indx]->udata.i;
3515 idx = asym_ptr->udata.i;
3519 /* This case can occur when using --strip-symbol on a symbol
3520 which is used in a relocation entry. */
3521 (*_bfd_error_handler)
3522 (_("%s: symbol `%s' required but not present"),
3523 bfd_get_filename (abfd), bfd_asymbol_name (asym_ptr));
3524 bfd_set_error (bfd_error_no_symbols);
3531 _("elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n"),
3532 (long) asym_ptr, asym_ptr->name, idx, flags,
3533 elf_symbol_flags (flags));
3541 /* Copy private BFD data. This copies any program header information. */
3544 copy_private_bfd_data (ibfd, obfd)
3548 Elf_Internal_Ehdr *iehdr;
3549 struct elf_segment_map *mfirst;
3550 struct elf_segment_map **pm;
3551 struct elf_segment_map *m;
3552 Elf_Internal_Phdr *p;
3554 unsigned int num_segments;
3555 boolean phdr_included = false;
3557 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
3558 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
3561 if (elf_tdata (ibfd)->phdr == NULL)
3564 iehdr = elf_elfheader (ibfd);
3569 num_segments = elf_elfheader (ibfd)->e_phnum;
3571 #define IS_CONTAINED_BY(addr, len, bottom, phdr) \
3572 ((addr) >= (bottom) \
3573 && ( ((addr) + (len)) <= ((bottom) + (phdr)->p_memsz) \
3574 || ((addr) + (len)) <= ((bottom) + (phdr)->p_filesz)))
3576 /* Special case: corefile "NOTE" section containing regs, prpsinfo etc. */
3578 #define IS_COREFILE_NOTE(p, s) \
3579 (p->p_type == PT_NOTE \
3580 && bfd_get_format (ibfd) == bfd_core \
3581 && s->vma == 0 && s->lma == 0 \
3582 && (bfd_vma) s->filepos >= p->p_offset \
3583 && (bfd_vma) s->filepos + s->_raw_size \
3584 <= p->p_offset + p->p_filesz)
3586 /* The complicated case when p_vaddr is 0 is to handle the Solaris
3587 linker, which generates a PT_INTERP section with p_vaddr and
3588 p_memsz set to 0. */
3590 #define IS_SOLARIS_PT_INTERP(p, s) \
3592 && p->p_filesz > 0 \
3593 && (s->flags & SEC_HAS_CONTENTS) != 0 \
3594 && s->_raw_size > 0 \
3595 && (bfd_vma) s->filepos >= p->p_offset \
3596 && ((bfd_vma) s->filepos + s->_raw_size \
3597 <= p->p_offset + p->p_filesz))
3599 /* Scan through the segments specified in the program header
3600 of the input BFD. */
3601 for (i = 0, p = elf_tdata (ibfd)->phdr; i < num_segments; i++, p++)
3605 asection **sections;
3608 bfd_vma matching_lma;
3609 bfd_vma suggested_lma;
3612 /* For each section in the input BFD, decide if it should be
3613 included in the current segment. A section will be included
3614 if it is within the address space of the segment, and it is
3615 an allocated segment, and there is an output section
3616 associated with it. */
3618 for (s = ibfd->sections; s != NULL; s = s->next)
3619 if (s->output_section != NULL)
3621 if ((IS_CONTAINED_BY (s->vma, s->_raw_size, p->p_vaddr, p)
3622 || IS_SOLARIS_PT_INTERP (p, s))
3623 && (s->flags & SEC_ALLOC) != 0)
3625 else if (IS_COREFILE_NOTE (p, s))
3629 /* Allocate a segment map big enough to contain all of the
3630 sections we have selected. */
3631 m = ((struct elf_segment_map *)
3633 (sizeof (struct elf_segment_map)
3634 + ((size_t) csecs - 1) * sizeof (asection *))));
3638 /* Initialise the fields of the segment map. Default to
3639 using the physical address of the segment in the input BFD. */
3641 m->p_type = p->p_type;
3642 m->p_flags = p->p_flags;
3643 m->p_flags_valid = 1;
3644 m->p_paddr = p->p_paddr;
3645 m->p_paddr_valid = 1;
3647 /* Determine if this segment contains the ELF file header
3648 and if it contains the program headers themselves. */
3649 m->includes_filehdr = (p->p_offset == 0
3650 && p->p_filesz >= iehdr->e_ehsize);
3652 m->includes_phdrs = 0;
3654 if (! phdr_included || p->p_type != PT_LOAD)
3657 (p->p_offset <= (bfd_vma) iehdr->e_phoff
3658 && (p->p_offset + p->p_filesz
3659 >= ((bfd_vma) iehdr->e_phoff
3660 + iehdr->e_phnum * iehdr->e_phentsize)));
3661 if (p->p_type == PT_LOAD && m->includes_phdrs)
3662 phdr_included = true;
3667 /* Special segments, such as the PT_PHDR segment, may contain
3668 no sections, but ordinary, loadable segments should contain
3671 if (p->p_type == PT_LOAD)
3673 (_("%s: warning: Empty loadable segment detected\n"),
3674 bfd_get_filename (ibfd));
3683 /* Now scan the sections in the input BFD again and attempt
3684 to add their corresponding output sections to the segment map.
3685 The problem here is how to handle an output section which has
3686 been moved (ie had its LMA changed). There are four possibilities:
3688 1. None of the sections have been moved.
3689 In this case we can continue to use the segment LMA from the
3692 2. All of the sections have been moved by the same amount.
3693 In this case we can change the segment's LMA to match the LMA
3694 of the first section.
3696 3. Some of the sections have been moved, others have not.
3697 In this case those sections which have not been moved can be
3698 placed in the current segment which will have to have its size,
3699 and possibly its LMA changed, and a new segment or segments will
3700 have to be created to contain the other sections.
3702 4. The sections have been moved, but not be the same amount.
3703 In this case we can change the segment's LMA to match the LMA
3704 of the first section and we will have to create a new segment
3705 or segments to contain the other sections.
3707 In order to save time, we allocate an array to hold the section
3708 pointers that we are interested in. As these sections get assigned
3709 to a segment, they are removed from this array. */
3711 sections = (asection **) bfd_malloc (sizeof (asection *) * csecs);
3712 if (sections == NULL)
3715 /* Step One: Scan for segment vs section LMA conflicts.
3716 Also add the sections to the section array allocated above.
3717 Also add the sections to the current segment. In the common
3718 case, where the sections have not been moved, this means that
3719 we have completely filled the segment, and there is nothing
3723 matching_lma = false;
3726 for (j = 0, s = ibfd->sections; s != NULL; s = s->next)
3728 os = s->output_section;
3730 if ((((IS_CONTAINED_BY (s->vma, s->_raw_size, p->p_vaddr, p)
3731 || IS_SOLARIS_PT_INTERP (p, s))
3732 && (s->flags & SEC_ALLOC) != 0)
3733 || IS_COREFILE_NOTE (p, s))
3738 /* The Solaris native linker always sets p_paddr to 0.
3739 We try to catch that case here, and set it to the
3745 && (os->vma == (p->p_vaddr
3746 + (m->includes_filehdr
3749 + (m->includes_phdrs
3750 ? iehdr->e_phnum * iehdr->e_phentsize
3752 m->p_paddr = p->p_vaddr;
3754 /* Match up the physical address of the segment with the
3755 LMA address of the output section. */
3756 if (IS_CONTAINED_BY (os->lma, os->_raw_size, m->p_paddr, p)
3757 || IS_COREFILE_NOTE (p, s))
3759 if (matching_lma == 0)
3760 matching_lma = os->lma;
3762 /* We assume that if the section fits within the segment
3763 that it does not overlap any other section within that
3765 m->sections[isec++] = os;
3767 else if (suggested_lma == 0)
3768 suggested_lma = os->lma;
3772 BFD_ASSERT (j == csecs);
3774 /* Step Two: Adjust the physical address of the current segment,
3778 /* All of the sections fitted within the segment as currently
3779 specified. This is the default case. Add the segment to
3780 the list of built segments and carry on to process the next
3781 program header in the input BFD. */
3789 else if (matching_lma != 0)
3791 /* At least one section fits inside the current segment.
3792 Keep it, but modify its physical address to match the
3793 LMA of the first section that fitted. */
3795 m->p_paddr = matching_lma;
3799 /* None of the sections fitted inside the current segment.
3800 Change the current segment's physical address to match
3801 the LMA of the first section. */
3803 m->p_paddr = suggested_lma;
3806 /* Step Three: Loop over the sections again, this time assigning
3807 those that fit to the current segment and remvoing them from the
3808 sections array; but making sure not to leave large gaps. Once all
3809 possible sections have been assigned to the current segment it is
3810 added to the list of built segments and if sections still remain
3811 to be assigned, a new segment is constructed before repeating
3819 /* Fill the current segment with sections that fit. */
3820 for (j = 0; j < csecs; j++)
3827 os = s->output_section;
3829 if (IS_CONTAINED_BY (os->lma, os->_raw_size, m->p_paddr, p)
3830 || IS_COREFILE_NOTE (p, s))
3834 /* If the first section in a segment does not start at
3835 the beginning of the segment, then something is wrong. */
3836 if (os->lma != m->p_paddr)
3841 asection * prev_sec;
3842 bfd_vma maxpagesize;
3844 prev_sec = m->sections[m->count - 1];
3845 maxpagesize = get_elf_backend_data (obfd)->maxpagesize;
3847 /* If the gap between the end of the previous section
3848 and the start of this section is more than maxpagesize
3849 then we need to start a new segment. */
3850 if (BFD_ALIGN (prev_sec->lma + prev_sec->_raw_size, maxpagesize)
3851 < BFD_ALIGN (os->lma, maxpagesize))
3853 if (suggested_lma == 0)
3854 suggested_lma = os->lma;
3860 m->sections[m->count++] = os;
3864 else if (suggested_lma == 0)
3865 suggested_lma = os->lma;
3868 BFD_ASSERT (m->count > 0);
3870 /* Add the current segment to the list of built segments. */
3876 /* We still have not allocated all of the sections to
3877 segments. Create a new segment here, initialise it
3878 and carry on looping. */
3880 m = ((struct elf_segment_map *)
3882 (sizeof (struct elf_segment_map)
3883 + ((size_t) csecs - 1) * sizeof (asection *))));
3887 /* Initialise the fields of the segment map. Set the physical
3888 physical address to the LMA of the first section that has
3889 not yet been assigned. */
3892 m->p_type = p->p_type;
3893 m->p_flags = p->p_flags;
3894 m->p_flags_valid = 1;
3895 m->p_paddr = suggested_lma;
3896 m->p_paddr_valid = 1;
3897 m->includes_filehdr = 0;
3898 m->includes_phdrs = 0;
3901 while (isec < csecs);
3906 /* The Solaris linker creates program headers in which all the
3907 p_paddr fields are zero. When we try to objcopy or strip such a
3908 file, we get confused. Check for this case, and if we find it
3909 reset the p_paddr_valid fields. */
3910 for (m = mfirst; m != NULL; m = m->next)
3911 if (m->p_paddr != 0)
3915 for (m = mfirst; m != NULL; m = m->next)
3916 m->p_paddr_valid = 0;
3919 elf_tdata (obfd)->segment_map = mfirst;
3922 /* Final Step: Sort the segments into ascending order of physical address. */
3925 struct elf_segment_map* prev;
3928 for (m = mfirst->next; m != NULL; prev = m, m = m->next)
3930 /* Yes I know - its a bubble sort....*/
3931 if (m->next != NULL && (m->next->p_paddr < m->p_paddr))
3933 /* swap m and m->next */
3934 prev->next = m->next;
3935 m->next = m->next->next;
3936 prev->next->next = m;
3945 #undef IS_CONTAINED_BY
3946 #undef IS_SOLARIS_PT_INTERP
3947 #undef IS_COREFILE_NOTE
3951 /* Copy private section information. This copies over the entsize
3952 field, and sometimes the info field. */
3955 _bfd_elf_copy_private_section_data (ibfd, isec, obfd, osec)
3961 Elf_Internal_Shdr *ihdr, *ohdr;
3963 if (ibfd->xvec->flavour != bfd_target_elf_flavour
3964 || obfd->xvec->flavour != bfd_target_elf_flavour)
3967 /* Copy over private BFD data if it has not already been copied.
3968 This must be done here, rather than in the copy_private_bfd_data
3969 entry point, because the latter is called after the section
3970 contents have been set, which means that the program headers have
3971 already been worked out. */
3972 if (elf_tdata (obfd)->segment_map == NULL
3973 && elf_tdata (ibfd)->phdr != NULL)
3977 /* Only set up the segments if there are no more SEC_ALLOC
3978 sections. FIXME: This won't do the right thing if objcopy is
3979 used to remove the last SEC_ALLOC section, since objcopy
3980 won't call this routine in that case. */
3981 for (s = isec->next; s != NULL; s = s->next)
3982 if ((s->flags & SEC_ALLOC) != 0)
3986 if (! copy_private_bfd_data (ibfd, obfd))
3991 ihdr = &elf_section_data (isec)->this_hdr;
3992 ohdr = &elf_section_data (osec)->this_hdr;
3994 ohdr->sh_entsize = ihdr->sh_entsize;
3996 if (ihdr->sh_type == SHT_SYMTAB
3997 || ihdr->sh_type == SHT_DYNSYM
3998 || ihdr->sh_type == SHT_GNU_verneed
3999 || ihdr->sh_type == SHT_GNU_verdef)
4000 ohdr->sh_info = ihdr->sh_info;
4002 elf_section_data (osec)->use_rela_p
4003 = elf_section_data (isec)->use_rela_p;
4008 /* Copy private symbol information. If this symbol is in a section
4009 which we did not map into a BFD section, try to map the section
4010 index correctly. We use special macro definitions for the mapped
4011 section indices; these definitions are interpreted by the
4012 swap_out_syms function. */
4014 #define MAP_ONESYMTAB (SHN_LORESERVE - 1)
4015 #define MAP_DYNSYMTAB (SHN_LORESERVE - 2)
4016 #define MAP_STRTAB (SHN_LORESERVE - 3)
4017 #define MAP_SHSTRTAB (SHN_LORESERVE - 4)
4020 _bfd_elf_copy_private_symbol_data (ibfd, isymarg, obfd, osymarg)
4026 elf_symbol_type *isym, *osym;
4028 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
4029 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
4032 isym = elf_symbol_from (ibfd, isymarg);
4033 osym = elf_symbol_from (obfd, osymarg);
4037 && bfd_is_abs_section (isym->symbol.section))
4041 shndx = isym->internal_elf_sym.st_shndx;
4042 if (shndx == elf_onesymtab (ibfd))
4043 shndx = MAP_ONESYMTAB;
4044 else if (shndx == elf_dynsymtab (ibfd))
4045 shndx = MAP_DYNSYMTAB;
4046 else if (shndx == elf_tdata (ibfd)->strtab_section)
4048 else if (shndx == elf_tdata (ibfd)->shstrtab_section)
4049 shndx = MAP_SHSTRTAB;
4050 osym->internal_elf_sym.st_shndx = shndx;
4056 /* Swap out the symbols. */
4059 swap_out_syms (abfd, sttp, relocatable_p)
4061 struct bfd_strtab_hash **sttp;
4064 struct elf_backend_data *bed = get_elf_backend_data (abfd);
4066 if (!elf_map_symbols (abfd))
4069 /* Dump out the symtabs. */
4071 int symcount = bfd_get_symcount (abfd);
4072 asymbol **syms = bfd_get_outsymbols (abfd);
4073 struct bfd_strtab_hash *stt;
4074 Elf_Internal_Shdr *symtab_hdr;
4075 Elf_Internal_Shdr *symstrtab_hdr;
4076 char *outbound_syms;
4079 stt = _bfd_elf_stringtab_init ();
4083 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4084 symtab_hdr->sh_type = SHT_SYMTAB;
4085 symtab_hdr->sh_entsize = bed->s->sizeof_sym;
4086 symtab_hdr->sh_size = symtab_hdr->sh_entsize * (symcount + 1);
4087 symtab_hdr->sh_info = elf_num_locals (abfd) + 1;
4088 symtab_hdr->sh_addralign = bed->s->file_align;
4090 symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr;
4091 symstrtab_hdr->sh_type = SHT_STRTAB;
4093 outbound_syms = bfd_alloc (abfd,
4094 (1 + symcount) * bed->s->sizeof_sym);
4095 if (outbound_syms == NULL)
4097 symtab_hdr->contents = (PTR) outbound_syms;
4099 /* now generate the data (for "contents") */
4101 /* Fill in zeroth symbol and swap it out. */
4102 Elf_Internal_Sym sym;
4108 sym.st_shndx = SHN_UNDEF;
4109 bed->s->swap_symbol_out (abfd, &sym, (PTR) outbound_syms);
4110 outbound_syms += bed->s->sizeof_sym;
4112 for (idx = 0; idx < symcount; idx++)
4114 Elf_Internal_Sym sym;
4115 bfd_vma value = syms[idx]->value;
4116 elf_symbol_type *type_ptr;
4117 flagword flags = syms[idx]->flags;
4120 if (flags & BSF_SECTION_SYM)
4121 /* Section symbols have no names. */
4125 sym.st_name = (unsigned long) _bfd_stringtab_add (stt,
4128 if (sym.st_name == (unsigned long) -1)
4132 type_ptr = elf_symbol_from (abfd, syms[idx]);
4134 if ((flags & BSF_SECTION_SYM) == 0
4135 && bfd_is_com_section (syms[idx]->section))
4137 /* ELF common symbols put the alignment into the `value' field,
4138 and the size into the `size' field. This is backwards from
4139 how BFD handles it, so reverse it here. */
4140 sym.st_size = value;
4141 if (type_ptr == NULL
4142 || type_ptr->internal_elf_sym.st_value == 0)
4143 sym.st_value = value >= 16 ? 16 : (1 << bfd_log2 (value));
4145 sym.st_value = type_ptr->internal_elf_sym.st_value;
4146 sym.st_shndx = _bfd_elf_section_from_bfd_section
4147 (abfd, syms[idx]->section);
4151 asection *sec = syms[idx]->section;
4154 if (sec->output_section)
4156 value += sec->output_offset;
4157 sec = sec->output_section;
4159 /* Don't add in the section vma for relocatable output. */
4160 if (! relocatable_p)
4162 sym.st_value = value;
4163 sym.st_size = type_ptr ? type_ptr->internal_elf_sym.st_size : 0;
4165 if (bfd_is_abs_section (sec)
4167 && type_ptr->internal_elf_sym.st_shndx != 0)
4169 /* This symbol is in a real ELF section which we did
4170 not create as a BFD section. Undo the mapping done
4171 by copy_private_symbol_data. */
4172 shndx = type_ptr->internal_elf_sym.st_shndx;
4176 shndx = elf_onesymtab (abfd);
4179 shndx = elf_dynsymtab (abfd);
4182 shndx = elf_tdata (abfd)->strtab_section;
4185 shndx = elf_tdata (abfd)->shstrtab_section;
4193 shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
4199 /* Writing this would be a hell of a lot easier if
4200 we had some decent documentation on bfd, and
4201 knew what to expect of the library, and what to
4202 demand of applications. For example, it
4203 appears that `objcopy' might not set the
4204 section of a symbol to be a section that is
4205 actually in the output file. */
4206 sec2 = bfd_get_section_by_name (abfd, sec->name);
4207 BFD_ASSERT (sec2 != 0);
4208 shndx = _bfd_elf_section_from_bfd_section (abfd, sec2);
4209 BFD_ASSERT (shndx != -1);
4213 sym.st_shndx = shndx;
4216 if ((flags & BSF_FUNCTION) != 0)
4218 else if ((flags & BSF_OBJECT) != 0)
4223 /* Processor-specific types */
4224 if (bed->elf_backend_get_symbol_type)
4225 type = (*bed->elf_backend_get_symbol_type) (&type_ptr->internal_elf_sym, type);
4227 if (flags & BSF_SECTION_SYM)
4228 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
4229 else if (bfd_is_com_section (syms[idx]->section))
4230 sym.st_info = ELF_ST_INFO (STB_GLOBAL, type);
4231 else if (bfd_is_und_section (syms[idx]->section))
4232 sym.st_info = ELF_ST_INFO (((flags & BSF_WEAK)
4236 else if (flags & BSF_FILE)
4237 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE);
4240 int bind = STB_LOCAL;
4242 if (flags & BSF_LOCAL)
4244 else if (flags & BSF_WEAK)
4246 else if (flags & BSF_GLOBAL)
4249 sym.st_info = ELF_ST_INFO (bind, type);
4252 if (type_ptr != NULL)
4253 sym.st_other = type_ptr->internal_elf_sym.st_other;
4257 bed->s->swap_symbol_out (abfd, &sym, (PTR) outbound_syms);
4258 outbound_syms += bed->s->sizeof_sym;
4262 symstrtab_hdr->sh_size = _bfd_stringtab_size (stt);
4263 symstrtab_hdr->sh_type = SHT_STRTAB;
4265 symstrtab_hdr->sh_flags = 0;
4266 symstrtab_hdr->sh_addr = 0;
4267 symstrtab_hdr->sh_entsize = 0;
4268 symstrtab_hdr->sh_link = 0;
4269 symstrtab_hdr->sh_info = 0;
4270 symstrtab_hdr->sh_addralign = 1;
4276 /* Return the number of bytes required to hold the symtab vector.
4278 Note that we base it on the count plus 1, since we will null terminate
4279 the vector allocated based on this size. However, the ELF symbol table
4280 always has a dummy entry as symbol #0, so it ends up even. */
4283 _bfd_elf_get_symtab_upper_bound (abfd)
4288 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->symtab_hdr;
4290 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
4291 symtab_size = (symcount - 1 + 1) * (sizeof (asymbol *));
4297 _bfd_elf_get_dynamic_symtab_upper_bound (abfd)
4302 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->dynsymtab_hdr;
4304 if (elf_dynsymtab (abfd) == 0)
4306 bfd_set_error (bfd_error_invalid_operation);
4310 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
4311 symtab_size = (symcount - 1 + 1) * (sizeof (asymbol *));
4317 _bfd_elf_get_reloc_upper_bound (abfd, asect)
4318 bfd *abfd ATTRIBUTE_UNUSED;
4321 return (asect->reloc_count + 1) * sizeof (arelent *);
4324 /* Canonicalize the relocs. */
4327 _bfd_elf_canonicalize_reloc (abfd, section, relptr, symbols)
4336 if (! get_elf_backend_data (abfd)->s->slurp_reloc_table (abfd,
4342 tblptr = section->relocation;
4343 for (i = 0; i < section->reloc_count; i++)
4344 *relptr++ = tblptr++;
4348 return section->reloc_count;
4352 _bfd_elf_get_symtab (abfd, alocation)
4354 asymbol **alocation;
4356 long symcount = get_elf_backend_data (abfd)->s->slurp_symbol_table
4357 (abfd, alocation, false);
4360 bfd_get_symcount (abfd) = symcount;
4365 _bfd_elf_canonicalize_dynamic_symtab (abfd, alocation)
4367 asymbol **alocation;
4369 return get_elf_backend_data (abfd)->s->slurp_symbol_table
4370 (abfd, alocation, true);
4373 /* Return the size required for the dynamic reloc entries. Any
4374 section that was actually installed in the BFD, and has type
4375 SHT_REL or SHT_RELA, and uses the dynamic symbol table, is
4376 considered to be a dynamic reloc section. */
4379 _bfd_elf_get_dynamic_reloc_upper_bound (abfd)
4385 if (elf_dynsymtab (abfd) == 0)
4387 bfd_set_error (bfd_error_invalid_operation);
4391 ret = sizeof (arelent *);
4392 for (s = abfd->sections; s != NULL; s = s->next)
4393 if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
4394 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
4395 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
4396 ret += ((s->_raw_size / elf_section_data (s)->this_hdr.sh_entsize)
4397 * sizeof (arelent *));
4402 /* Canonicalize the dynamic relocation entries. Note that we return
4403 the dynamic relocations as a single block, although they are
4404 actually associated with particular sections; the interface, which
4405 was designed for SunOS style shared libraries, expects that there
4406 is only one set of dynamic relocs. Any section that was actually
4407 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses
4408 the dynamic symbol table, is considered to be a dynamic reloc
4412 _bfd_elf_canonicalize_dynamic_reloc (abfd, storage, syms)
4417 boolean (*slurp_relocs) PARAMS ((bfd *, asection *, asymbol **, boolean));
4421 if (elf_dynsymtab (abfd) == 0)
4423 bfd_set_error (bfd_error_invalid_operation);
4427 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
4429 for (s = abfd->sections; s != NULL; s = s->next)
4431 if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
4432 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
4433 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
4438 if (! (*slurp_relocs) (abfd, s, syms, true))
4440 count = s->_raw_size / elf_section_data (s)->this_hdr.sh_entsize;
4442 for (i = 0; i < count; i++)
4453 /* Read in the version information. */
4456 _bfd_elf_slurp_version_tables (abfd)
4459 bfd_byte *contents = NULL;
4461 if (elf_dynverdef (abfd) != 0)
4463 Elf_Internal_Shdr *hdr;
4464 Elf_External_Verdef *everdef;
4465 Elf_Internal_Verdef *iverdef;
4468 hdr = &elf_tdata (abfd)->dynverdef_hdr;
4470 elf_tdata (abfd)->verdef =
4471 ((Elf_Internal_Verdef *)
4472 bfd_zalloc (abfd, hdr->sh_info * sizeof (Elf_Internal_Verdef)));
4473 if (elf_tdata (abfd)->verdef == NULL)
4476 elf_tdata (abfd)->cverdefs = hdr->sh_info;
4478 contents = (bfd_byte *) bfd_malloc (hdr->sh_size);
4479 if (contents == NULL)
4481 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
4482 || bfd_read ((PTR) contents, 1, hdr->sh_size, abfd) != hdr->sh_size)
4485 everdef = (Elf_External_Verdef *) contents;
4486 iverdef = elf_tdata (abfd)->verdef;
4487 for (i = 0; i < hdr->sh_info; i++, iverdef++)
4489 Elf_External_Verdaux *everdaux;
4490 Elf_Internal_Verdaux *iverdaux;
4493 _bfd_elf_swap_verdef_in (abfd, everdef, iverdef);
4495 iverdef->vd_bfd = abfd;
4497 iverdef->vd_auxptr = ((Elf_Internal_Verdaux *)
4500 * sizeof (Elf_Internal_Verdaux))));
4501 if (iverdef->vd_auxptr == NULL)
4504 everdaux = ((Elf_External_Verdaux *)
4505 ((bfd_byte *) everdef + iverdef->vd_aux));
4506 iverdaux = iverdef->vd_auxptr;
4507 for (j = 0; j < iverdef->vd_cnt; j++, iverdaux++)
4509 _bfd_elf_swap_verdaux_in (abfd, everdaux, iverdaux);
4511 iverdaux->vda_nodename =
4512 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
4513 iverdaux->vda_name);
4514 if (iverdaux->vda_nodename == NULL)
4517 if (j + 1 < iverdef->vd_cnt)
4518 iverdaux->vda_nextptr = iverdaux + 1;
4520 iverdaux->vda_nextptr = NULL;
4522 everdaux = ((Elf_External_Verdaux *)
4523 ((bfd_byte *) everdaux + iverdaux->vda_next));
4526 iverdef->vd_nodename = iverdef->vd_auxptr->vda_nodename;
4528 if (i + 1 < hdr->sh_info)
4529 iverdef->vd_nextdef = iverdef + 1;
4531 iverdef->vd_nextdef = NULL;
4533 everdef = ((Elf_External_Verdef *)
4534 ((bfd_byte *) everdef + iverdef->vd_next));
4541 if (elf_dynverref (abfd) != 0)
4543 Elf_Internal_Shdr *hdr;
4544 Elf_External_Verneed *everneed;
4545 Elf_Internal_Verneed *iverneed;
4548 hdr = &elf_tdata (abfd)->dynverref_hdr;
4550 elf_tdata (abfd)->verref =
4551 ((Elf_Internal_Verneed *)
4552 bfd_zalloc (abfd, hdr->sh_info * sizeof (Elf_Internal_Verneed)));
4553 if (elf_tdata (abfd)->verref == NULL)
4556 elf_tdata (abfd)->cverrefs = hdr->sh_info;
4558 contents = (bfd_byte *) bfd_malloc (hdr->sh_size);
4559 if (contents == NULL)
4561 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
4562 || bfd_read ((PTR) contents, 1, hdr->sh_size, abfd) != hdr->sh_size)
4565 everneed = (Elf_External_Verneed *) contents;
4566 iverneed = elf_tdata (abfd)->verref;
4567 for (i = 0; i < hdr->sh_info; i++, iverneed++)
4569 Elf_External_Vernaux *evernaux;
4570 Elf_Internal_Vernaux *ivernaux;
4573 _bfd_elf_swap_verneed_in (abfd, everneed, iverneed);
4575 iverneed->vn_bfd = abfd;
4577 iverneed->vn_filename =
4578 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
4580 if (iverneed->vn_filename == NULL)
4583 iverneed->vn_auxptr =
4584 ((Elf_Internal_Vernaux *)
4586 iverneed->vn_cnt * sizeof (Elf_Internal_Vernaux)));
4588 evernaux = ((Elf_External_Vernaux *)
4589 ((bfd_byte *) everneed + iverneed->vn_aux));
4590 ivernaux = iverneed->vn_auxptr;
4591 for (j = 0; j < iverneed->vn_cnt; j++, ivernaux++)
4593 _bfd_elf_swap_vernaux_in (abfd, evernaux, ivernaux);
4595 ivernaux->vna_nodename =
4596 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
4597 ivernaux->vna_name);
4598 if (ivernaux->vna_nodename == NULL)
4601 if (j + 1 < iverneed->vn_cnt)
4602 ivernaux->vna_nextptr = ivernaux + 1;
4604 ivernaux->vna_nextptr = NULL;
4606 evernaux = ((Elf_External_Vernaux *)
4607 ((bfd_byte *) evernaux + ivernaux->vna_next));
4610 if (i + 1 < hdr->sh_info)
4611 iverneed->vn_nextref = iverneed + 1;
4613 iverneed->vn_nextref = NULL;
4615 everneed = ((Elf_External_Verneed *)
4616 ((bfd_byte *) everneed + iverneed->vn_next));
4626 if (contents == NULL)
4632 _bfd_elf_make_empty_symbol (abfd)
4635 elf_symbol_type *newsym;
4637 newsym = (elf_symbol_type *) bfd_zalloc (abfd, sizeof (elf_symbol_type));
4642 newsym->symbol.the_bfd = abfd;
4643 return &newsym->symbol;
4648 _bfd_elf_get_symbol_info (ignore_abfd, symbol, ret)
4649 bfd *ignore_abfd ATTRIBUTE_UNUSED;
4653 bfd_symbol_info (symbol, ret);
4656 /* Return whether a symbol name implies a local symbol. Most targets
4657 use this function for the is_local_label_name entry point, but some
4661 _bfd_elf_is_local_label_name (abfd, name)
4662 bfd *abfd ATTRIBUTE_UNUSED;
4665 /* Normal local symbols start with ``.L''. */
4666 if (name[0] == '.' && name[1] == 'L')
4669 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
4670 DWARF debugging symbols starting with ``..''. */
4671 if (name[0] == '.' && name[1] == '.')
4674 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
4675 emitting DWARF debugging output. I suspect this is actually a
4676 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
4677 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
4678 underscore to be emitted on some ELF targets). For ease of use,
4679 we treat such symbols as local. */
4680 if (name[0] == '_' && name[1] == '.' && name[2] == 'L' && name[3] == '_')
4687 _bfd_elf_get_lineno (ignore_abfd, symbol)
4688 bfd *ignore_abfd ATTRIBUTE_UNUSED;
4689 asymbol *symbol ATTRIBUTE_UNUSED;
4696 _bfd_elf_set_arch_mach (abfd, arch, machine)
4698 enum bfd_architecture arch;
4699 unsigned long machine;
4701 /* If this isn't the right architecture for this backend, and this
4702 isn't the generic backend, fail. */
4703 if (arch != get_elf_backend_data (abfd)->arch
4704 && arch != bfd_arch_unknown
4705 && get_elf_backend_data (abfd)->arch != bfd_arch_unknown)
4708 return bfd_default_set_arch_mach (abfd, arch, machine);
4711 /* Find the nearest line to a particular section and offset, for error
4715 _bfd_elf_find_nearest_line (abfd,
4726 CONST char **filename_ptr;
4727 CONST char **functionname_ptr;
4728 unsigned int *line_ptr;
4731 const char *filename;
4736 if (_bfd_dwarf1_find_nearest_line (abfd, section, symbols, offset,
4737 filename_ptr, functionname_ptr,
4741 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
4742 filename_ptr, functionname_ptr,
4746 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
4747 &found, filename_ptr,
4748 functionname_ptr, line_ptr,
4749 &elf_tdata (abfd)->line_info))
4754 if (symbols == NULL)
4761 for (p = symbols; *p != NULL; p++)
4765 q = (elf_symbol_type *) *p;
4767 if (bfd_get_section (&q->symbol) != section)
4770 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
4775 filename = bfd_asymbol_name (&q->symbol);
4779 if (q->symbol.section == section
4780 && q->symbol.value >= low_func
4781 && q->symbol.value <= offset)
4783 func = (asymbol *) q;
4784 low_func = q->symbol.value;
4793 *filename_ptr = filename;
4794 *functionname_ptr = bfd_asymbol_name (func);
4800 _bfd_elf_sizeof_headers (abfd, reloc)
4806 ret = get_elf_backend_data (abfd)->s->sizeof_ehdr;
4808 ret += get_program_header_size (abfd);
4813 _bfd_elf_set_section_contents (abfd, section, location, offset, count)
4818 bfd_size_type count;
4820 Elf_Internal_Shdr *hdr;
4822 if (! abfd->output_has_begun
4823 && ! _bfd_elf_compute_section_file_positions
4824 (abfd, (struct bfd_link_info *) NULL))
4827 hdr = &elf_section_data (section)->this_hdr;
4829 if (bfd_seek (abfd, hdr->sh_offset + offset, SEEK_SET) == -1)
4831 if (bfd_write (location, 1, count, abfd) != count)
4838 _bfd_elf_no_info_to_howto (abfd, cache_ptr, dst)
4839 bfd *abfd ATTRIBUTE_UNUSED;
4840 arelent *cache_ptr ATTRIBUTE_UNUSED;
4841 Elf_Internal_Rela *dst ATTRIBUTE_UNUSED;
4848 _bfd_elf_no_info_to_howto_rel (abfd, cache_ptr, dst)
4851 Elf_Internal_Rel *dst;
4857 /* Try to convert a non-ELF reloc into an ELF one. */
4860 _bfd_elf_validate_reloc (abfd, areloc)
4864 /* Check whether we really have an ELF howto. */
4866 if ((*areloc->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec)
4868 bfd_reloc_code_real_type code;
4869 reloc_howto_type *howto;
4871 /* Alien reloc: Try to determine its type to replace it with an
4872 equivalent ELF reloc. */
4874 if (areloc->howto->pc_relative)
4876 switch (areloc->howto->bitsize)
4879 code = BFD_RELOC_8_PCREL;
4882 code = BFD_RELOC_12_PCREL;
4885 code = BFD_RELOC_16_PCREL;
4888 code = BFD_RELOC_24_PCREL;
4891 code = BFD_RELOC_32_PCREL;
4894 code = BFD_RELOC_64_PCREL;
4900 howto = bfd_reloc_type_lookup (abfd, code);
4902 if (areloc->howto->pcrel_offset != howto->pcrel_offset)
4904 if (howto->pcrel_offset)
4905 areloc->addend += areloc->address;
4907 areloc->addend -= areloc->address; /* addend is unsigned!! */
4912 switch (areloc->howto->bitsize)
4918 code = BFD_RELOC_14;
4921 code = BFD_RELOC_16;
4924 code = BFD_RELOC_26;
4927 code = BFD_RELOC_32;
4930 code = BFD_RELOC_64;
4936 howto = bfd_reloc_type_lookup (abfd, code);
4940 areloc->howto = howto;
4948 (*_bfd_error_handler)
4949 (_("%s: unsupported relocation type %s"),
4950 bfd_get_filename (abfd), areloc->howto->name);
4951 bfd_set_error (bfd_error_bad_value);
4956 _bfd_elf_close_and_cleanup (abfd)
4959 if (bfd_get_format (abfd) == bfd_object)
4961 if (elf_shstrtab (abfd) != NULL)
4962 _bfd_stringtab_free (elf_shstrtab (abfd));
4965 return _bfd_generic_close_and_cleanup (abfd);
4968 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
4969 in the relocation's offset. Thus we cannot allow any sort of sanity
4970 range-checking to interfere. There is nothing else to do in processing
4973 bfd_reloc_status_type
4974 _bfd_elf_rel_vtable_reloc_fn (abfd, re, symbol, data, is, obfd, errmsg)
4975 bfd *abfd ATTRIBUTE_UNUSED;
4976 arelent *re ATTRIBUTE_UNUSED;
4977 struct symbol_cache_entry *symbol ATTRIBUTE_UNUSED;
4978 PTR data ATTRIBUTE_UNUSED;
4979 asection *is ATTRIBUTE_UNUSED;
4980 bfd *obfd ATTRIBUTE_UNUSED;
4981 char **errmsg ATTRIBUTE_UNUSED;
4983 return bfd_reloc_ok;
4987 /* Elf core file support. Much of this only works on native
4988 toolchains, since we rely on knowing the
4989 machine-dependent procfs structure in order to pick
4990 out details about the corefile. */
4992 #ifdef HAVE_SYS_PROCFS_H
4993 # include <sys/procfs.h>
4997 /* Define offsetof for those systems which lack it. */
5000 # define offsetof(TYPE, MEMBER) ((unsigned long) &((TYPE *)0)->MEMBER)
5004 /* FIXME: this is kinda wrong, but it's what gdb wants. */
5007 elfcore_make_pid (abfd)
5010 return ((elf_tdata (abfd)->core_lwpid << 16)
5011 + (elf_tdata (abfd)->core_pid));
5015 /* If there isn't a section called NAME, make one, using
5016 data from SECT. Note, this function will generate a
5017 reference to NAME, so you shouldn't deallocate or
5021 elfcore_maybe_make_sect (abfd, name, sect)
5028 if (bfd_get_section_by_name (abfd, name) != NULL)
5031 sect2 = bfd_make_section (abfd, name);
5035 sect2->_raw_size = sect->_raw_size;
5036 sect2->filepos = sect->filepos;
5037 sect2->flags = sect->flags;
5038 sect2->alignment_power = sect->alignment_power;
5043 /* prstatus_t exists on:
5045 linux 2.[01] + glibc
5049 #if defined (HAVE_PRSTATUS_T)
5051 elfcore_grok_prstatus (abfd, note)
5053 Elf_Internal_Note* note;
5060 if (note->descsz != sizeof (prstat))
5063 memcpy (&prstat, note->descdata, sizeof (prstat));
5065 elf_tdata (abfd)->core_signal = prstat.pr_cursig;
5066 elf_tdata (abfd)->core_pid = prstat.pr_pid;
5068 /* pr_who exists on:
5071 pr_who doesn't exist on:
5074 #if defined (HAVE_PRSTATUS_T_PR_WHO)
5075 elf_tdata (abfd)->core_lwpid = prstat.pr_who;
5078 /* Make a ".reg/999" section. */
5080 sprintf (buf, ".reg/%d", elfcore_make_pid (abfd));
5081 name = bfd_alloc (abfd, strlen (buf) + 1);
5086 sect = bfd_make_section (abfd, name);
5089 sect->_raw_size = sizeof (prstat.pr_reg);
5090 sect->filepos = note->descpos + offsetof (prstatus_t, pr_reg);
5091 sect->flags = SEC_HAS_CONTENTS;
5092 sect->alignment_power = 2;
5094 if (! elfcore_maybe_make_sect (abfd, ".reg", sect))
5099 #endif /* defined (HAVE_PRSTATUS_T) */
5102 /* Create a pseudosection containing the exact contents of NOTE. This
5103 actually creates up to two pseudosections:
5104 - For the single-threaded case, a section named NAME, unless
5105 such a section already exists.
5106 - For the multi-threaded case, a section named "NAME/PID", where
5107 PID is elfcore_make_pid (abfd).
5108 Both pseudosections have identical contents: the contents of NOTE. */
5111 elfcore_make_note_pseudosection (abfd, name, note)
5114 Elf_Internal_Note* note;
5117 char *threaded_name;
5120 /* Build the section name. */
5122 sprintf (buf, "%s/%d", name, elfcore_make_pid (abfd));
5123 threaded_name = bfd_alloc (abfd, strlen (buf) + 1);
5124 if (threaded_name == NULL)
5126 strcpy (threaded_name, buf);
5128 sect = bfd_make_section (abfd, threaded_name);
5131 sect->_raw_size = note->descsz;
5132 sect->filepos = note->descpos;
5133 sect->flags = SEC_HAS_CONTENTS;
5134 sect->alignment_power = 2;
5136 if (! elfcore_maybe_make_sect (abfd, name, sect))
5143 /* There isn't a consistent prfpregset_t across platforms,
5144 but it doesn't matter, because we don't have to pick this
5145 data structure apart. */
5147 elfcore_grok_prfpreg (abfd, note)
5149 Elf_Internal_Note* note;
5151 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
5155 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
5156 type of 5 (NT_PRXFPREG). Just include the whole note's contents
5159 elfcore_grok_prxfpreg (abfd, note)
5161 Elf_Internal_Note* note;
5163 return elfcore_make_note_pseudosection (abfd, ".reg-xfp", note);
5167 #if defined (HAVE_PRPSINFO_T)
5168 # define elfcore_psinfo_t prpsinfo_t
5171 #if defined (HAVE_PSINFO_T)
5172 # define elfcore_psinfo_t psinfo_t
5176 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
5178 /* return a malloc'ed copy of a string at START which is at
5179 most MAX bytes long, possibly without a terminating '\0'.
5180 the copy will always have a terminating '\0'. */
5183 elfcore_strndup (abfd, start, max)
5189 char* end = memchr (start, '\0', max);
5197 dup = bfd_alloc (abfd, len + 1);
5201 memcpy (dup, start, len);
5208 elfcore_grok_psinfo (abfd, note)
5210 Elf_Internal_Note* note;
5212 elfcore_psinfo_t psinfo;
5214 if (note->descsz != sizeof (elfcore_psinfo_t))
5217 memcpy (&psinfo, note->descdata, note->descsz);
5219 elf_tdata (abfd)->core_program
5220 = elfcore_strndup (abfd, psinfo.pr_fname, sizeof (psinfo.pr_fname));
5222 elf_tdata (abfd)->core_command
5223 = elfcore_strndup (abfd, psinfo.pr_psargs, sizeof (psinfo.pr_psargs));
5225 /* Note that for some reason, a spurious space is tacked
5226 onto the end of the args in some (at least one anyway)
5227 implementations, so strip it off if it exists. */
5230 char* command = elf_tdata (abfd)->core_command;
5231 int n = strlen (command);
5233 if (0 < n && command[n - 1] == ' ')
5234 command[n - 1] = '\0';
5239 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
5242 #if defined (HAVE_PSTATUS_T)
5244 elfcore_grok_pstatus (abfd, note)
5246 Elf_Internal_Note* note;
5250 if (note->descsz != sizeof (pstat))
5253 memcpy (&pstat, note->descdata, sizeof (pstat));
5255 elf_tdata (abfd)->core_pid = pstat.pr_pid;
5257 /* Could grab some more details from the "representative"
5258 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
5259 NT_LWPSTATUS note, presumably. */
5263 #endif /* defined (HAVE_PSTATUS_T) */
5266 #if defined (HAVE_LWPSTATUS_T)
5268 elfcore_grok_lwpstatus (abfd, note)
5270 Elf_Internal_Note* note;
5272 lwpstatus_t lwpstat;
5277 if (note->descsz != sizeof (lwpstat))
5280 memcpy (&lwpstat, note->descdata, sizeof (lwpstat));
5282 elf_tdata (abfd)->core_lwpid = lwpstat.pr_lwpid;
5283 elf_tdata (abfd)->core_signal = lwpstat.pr_cursig;
5285 /* Make a ".reg/999" section. */
5287 sprintf (buf, ".reg/%d", elfcore_make_pid (abfd));
5288 name = bfd_alloc (abfd, strlen (buf) + 1);
5293 sect = bfd_make_section (abfd, name);
5297 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
5298 sect->_raw_size = sizeof (lwpstat.pr_context.uc_mcontext.gregs);
5299 sect->filepos = note->descpos
5300 + offsetof (lwpstatus_t, pr_context.uc_mcontext.gregs);
5303 #if defined (HAVE_LWPSTATUS_T_PR_REG)
5304 sect->_raw_size = sizeof (lwpstat.pr_reg);
5305 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_reg);
5308 sect->flags = SEC_HAS_CONTENTS;
5309 sect->alignment_power = 2;
5311 if (!elfcore_maybe_make_sect (abfd, ".reg", sect))
5314 /* Make a ".reg2/999" section */
5316 sprintf (buf, ".reg2/%d", elfcore_make_pid (abfd));
5317 name = bfd_alloc (abfd, strlen (buf) + 1);
5322 sect = bfd_make_section (abfd, name);
5326 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
5327 sect->_raw_size = sizeof (lwpstat.pr_context.uc_mcontext.fpregs);
5328 sect->filepos = note->descpos
5329 + offsetof (lwpstatus_t, pr_context.uc_mcontext.fpregs);
5332 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
5333 sect->_raw_size = sizeof (lwpstat.pr_fpreg);
5334 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_fpreg);
5337 sect->flags = SEC_HAS_CONTENTS;
5338 sect->alignment_power = 2;
5340 if (!elfcore_maybe_make_sect (abfd, ".reg2", sect))
5345 #endif /* defined (HAVE_LWPSTATUS_T) */
5347 #if defined (HAVE_WIN32_PSTATUS_T)
5349 elfcore_grok_win32pstatus (abfd, note)
5351 Elf_Internal_Note * note;
5356 win32_pstatus_t pstatus;
5358 if (note->descsz < sizeof (pstatus))
5361 memcpy (& pstatus, note->descdata, note->descsz);
5363 switch (pstatus.data_type)
5365 case NOTE_INFO_PROCESS:
5366 /* FIXME: need to add ->core_command. */
5367 elf_tdata (abfd)->core_signal = pstatus.data.process_info.signal;
5368 elf_tdata (abfd)->core_pid = pstatus.data.process_info.pid;
5371 case NOTE_INFO_THREAD:
5372 /* Make a ".reg/999" section. */
5373 sprintf (buf, ".reg/%d", pstatus.data.thread_info.tid);
5375 name = bfd_alloc (abfd, strlen (buf) + 1);
5381 sect = bfd_make_section (abfd, name);
5385 sect->_raw_size = sizeof (pstatus.data.thread_info.thread_context);
5386 sect->filepos = note->descpos + offsetof (struct win32_pstatus,
5387 data.thread_info.thread_context);
5388 sect->flags = SEC_HAS_CONTENTS;
5389 sect->alignment_power = 2;
5391 if (pstatus.data.thread_info.is_active_thread)
5392 if (! elfcore_maybe_make_sect (abfd, ".reg", sect))
5396 case NOTE_INFO_MODULE:
5397 /* Make a ".module/xxxxxxxx" section. */
5398 sprintf (buf, ".module/%08x" , pstatus.data.module_info.base_address);
5400 name = bfd_alloc (abfd, strlen (buf) + 1);
5406 sect = bfd_make_section (abfd, name);
5411 sect->_raw_size = note->descsz;
5412 sect->filepos = note->descpos;
5413 sect->flags = SEC_HAS_CONTENTS;
5414 sect->alignment_power = 2;
5423 #endif /* HAVE_WIN32_PSTATUS_T */
5426 elfcore_grok_note (abfd, note)
5428 Elf_Internal_Note* note;
5435 #if defined (HAVE_PRSTATUS_T)
5437 return elfcore_grok_prstatus (abfd, note);
5440 #if defined (HAVE_PSTATUS_T)
5442 return elfcore_grok_pstatus (abfd, note);
5445 #if defined (HAVE_LWPSTATUS_T)
5447 return elfcore_grok_lwpstatus (abfd, note);
5450 case NT_FPREGSET: /* FIXME: rename to NT_PRFPREG */
5451 return elfcore_grok_prfpreg (abfd, note);
5453 #if defined (HAVE_WIN32_PSTATUS_T)
5454 case NT_WIN32PSTATUS:
5455 return elfcore_grok_win32pstatus (abfd, note);
5458 case NT_PRXFPREG: /* Linux SSE extension */
5459 if (note->namesz == 5
5460 && ! strcmp (note->namedata, "LINUX"))
5461 return elfcore_grok_prxfpreg (abfd, note);
5465 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
5468 return elfcore_grok_psinfo (abfd, note);
5475 elfcore_read_notes (abfd, offset, size)
5486 if (bfd_seek (abfd, offset, SEEK_SET) == -1)
5489 buf = bfd_malloc ((size_t) size);
5493 if (bfd_read (buf, size, 1, abfd) != size)
5501 while (p < buf + size)
5503 /* FIXME: bad alignment assumption. */
5504 Elf_External_Note* xnp = (Elf_External_Note*) p;
5505 Elf_Internal_Note in;
5507 in.type = bfd_h_get_32 (abfd, (bfd_byte *) xnp->type);
5509 in.namesz = bfd_h_get_32 (abfd, (bfd_byte *) xnp->namesz);
5510 in.namedata = xnp->name;
5512 in.descsz = bfd_h_get_32 (abfd, (bfd_byte *) xnp->descsz);
5513 in.descdata = in.namedata + BFD_ALIGN (in.namesz, 4);
5514 in.descpos = offset + (in.descdata - buf);
5516 if (! elfcore_grok_note (abfd, &in))
5519 p = in.descdata + BFD_ALIGN (in.descsz, 4);
5527 /* FIXME: This function is now unnecessary. Callers can just call
5528 bfd_section_from_phdr directly. */
5531 _bfd_elfcore_section_from_phdr (abfd, phdr, sec_num)
5533 Elf_Internal_Phdr* phdr;
5536 if (! bfd_section_from_phdr (abfd, phdr, sec_num))
5544 /* Providing external access to the ELF program header table. */
5546 /* Return an upper bound on the number of bytes required to store a
5547 copy of ABFD's program header table entries. Return -1 if an error
5548 occurs; bfd_get_error will return an appropriate code. */
5550 bfd_get_elf_phdr_upper_bound (abfd)
5553 if (abfd->xvec->flavour != bfd_target_elf_flavour)
5555 bfd_set_error (bfd_error_wrong_format);
5559 return (elf_elfheader (abfd)->e_phnum
5560 * sizeof (Elf_Internal_Phdr));
5564 /* Copy ABFD's program header table entries to *PHDRS. The entries
5565 will be stored as an array of Elf_Internal_Phdr structures, as
5566 defined in include/elf/internal.h. To find out how large the
5567 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
5569 Return the number of program header table entries read, or -1 if an
5570 error occurs; bfd_get_error will return an appropriate code. */
5572 bfd_get_elf_phdrs (abfd, phdrs)
5578 if (abfd->xvec->flavour != bfd_target_elf_flavour)
5580 bfd_set_error (bfd_error_wrong_format);
5584 num_phdrs = elf_elfheader (abfd)->e_phnum;
5585 memcpy (phdrs, elf_tdata (abfd)->phdr,
5586 num_phdrs * sizeof (Elf_Internal_Phdr));