1 /* ELF executable support for BFD.
2 Copyright 1993, 1994, 1995, 1996, 1997 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 **));
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 *));
57 /* Swap version information in and out. The version information is
58 currently size independent. If that ever changes, this code will
59 need to move into elfcode.h. */
61 /* Swap in a Verdef structure. */
64 _bfd_elf_swap_verdef_in (abfd, src, dst)
66 const Elf_External_Verdef *src;
67 Elf_Internal_Verdef *dst;
69 dst->vd_version = bfd_h_get_16 (abfd, src->vd_version);
70 dst->vd_flags = bfd_h_get_16 (abfd, src->vd_flags);
71 dst->vd_ndx = bfd_h_get_16 (abfd, src->vd_ndx);
72 dst->vd_cnt = bfd_h_get_16 (abfd, src->vd_cnt);
73 dst->vd_hash = bfd_h_get_32 (abfd, src->vd_hash);
74 dst->vd_aux = bfd_h_get_32 (abfd, src->vd_aux);
75 dst->vd_next = bfd_h_get_32 (abfd, src->vd_next);
78 /* Swap out a Verdef structure. */
81 _bfd_elf_swap_verdef_out (abfd, src, dst)
83 const Elf_Internal_Verdef *src;
84 Elf_External_Verdef *dst;
86 bfd_h_put_16 (abfd, src->vd_version, dst->vd_version);
87 bfd_h_put_16 (abfd, src->vd_flags, dst->vd_flags);
88 bfd_h_put_16 (abfd, src->vd_ndx, dst->vd_ndx);
89 bfd_h_put_16 (abfd, src->vd_cnt, dst->vd_cnt);
90 bfd_h_put_32 (abfd, src->vd_hash, dst->vd_hash);
91 bfd_h_put_32 (abfd, src->vd_aux, dst->vd_aux);
92 bfd_h_put_32 (abfd, src->vd_next, dst->vd_next);
95 /* Swap in a Verdaux structure. */
98 _bfd_elf_swap_verdaux_in (abfd, src, dst)
100 const Elf_External_Verdaux *src;
101 Elf_Internal_Verdaux *dst;
103 dst->vda_name = bfd_h_get_32 (abfd, src->vda_name);
104 dst->vda_next = bfd_h_get_32 (abfd, src->vda_next);
107 /* Swap out a Verdaux structure. */
110 _bfd_elf_swap_verdaux_out (abfd, src, dst)
112 const Elf_Internal_Verdaux *src;
113 Elf_External_Verdaux *dst;
115 bfd_h_put_32 (abfd, src->vda_name, dst->vda_name);
116 bfd_h_put_32 (abfd, src->vda_next, dst->vda_next);
119 /* Swap in a Verneed structure. */
122 _bfd_elf_swap_verneed_in (abfd, src, dst)
124 const Elf_External_Verneed *src;
125 Elf_Internal_Verneed *dst;
127 dst->vn_version = bfd_h_get_16 (abfd, src->vn_version);
128 dst->vn_cnt = bfd_h_get_16 (abfd, src->vn_cnt);
129 dst->vn_file = bfd_h_get_32 (abfd, src->vn_file);
130 dst->vn_aux = bfd_h_get_32 (abfd, src->vn_aux);
131 dst->vn_next = bfd_h_get_32 (abfd, src->vn_next);
134 /* Swap out a Verneed structure. */
137 _bfd_elf_swap_verneed_out (abfd, src, dst)
139 const Elf_Internal_Verneed *src;
140 Elf_External_Verneed *dst;
142 bfd_h_put_16 (abfd, src->vn_version, dst->vn_version);
143 bfd_h_put_16 (abfd, src->vn_cnt, dst->vn_cnt);
144 bfd_h_put_32 (abfd, src->vn_file, dst->vn_file);
145 bfd_h_put_32 (abfd, src->vn_aux, dst->vn_aux);
146 bfd_h_put_32 (abfd, src->vn_next, dst->vn_next);
149 /* Swap in a Vernaux structure. */
152 _bfd_elf_swap_vernaux_in (abfd, src, dst)
154 const Elf_External_Vernaux *src;
155 Elf_Internal_Vernaux *dst;
157 dst->vna_hash = bfd_h_get_32 (abfd, src->vna_hash);
158 dst->vna_flags = bfd_h_get_16 (abfd, src->vna_flags);
159 dst->vna_other = bfd_h_get_16 (abfd, src->vna_other);
160 dst->vna_name = bfd_h_get_32 (abfd, src->vna_name);
161 dst->vna_next = bfd_h_get_32 (abfd, src->vna_next);
164 /* Swap out a Vernaux structure. */
167 _bfd_elf_swap_vernaux_out (abfd, src, dst)
169 const Elf_Internal_Vernaux *src;
170 Elf_External_Vernaux *dst;
172 bfd_h_put_32 (abfd, src->vna_hash, dst->vna_hash);
173 bfd_h_put_16 (abfd, src->vna_flags, dst->vna_flags);
174 bfd_h_put_16 (abfd, src->vna_other, dst->vna_other);
175 bfd_h_put_32 (abfd, src->vna_name, dst->vna_name);
176 bfd_h_put_32 (abfd, src->vna_next, dst->vna_next);
179 /* Swap in a Versym structure. */
182 _bfd_elf_swap_versym_in (abfd, src, dst)
184 const Elf_External_Versym *src;
185 Elf_Internal_Versym *dst;
187 dst->vs_vers = bfd_h_get_16 (abfd, src->vs_vers);
190 /* Swap out a Versym structure. */
193 _bfd_elf_swap_versym_out (abfd, src, dst)
195 const Elf_Internal_Versym *src;
196 Elf_External_Versym *dst;
198 bfd_h_put_16 (abfd, src->vs_vers, dst->vs_vers);
201 /* Standard ELF hash function. Do not change this function; you will
202 cause invalid hash tables to be generated. (Well, you would if this
203 were being used yet.) */
206 CONST unsigned char *name;
212 while ((ch = *name++) != '\0')
215 if ((g = (h & 0xf0000000)) != 0)
224 /* Read a specified number of bytes at a specified offset in an ELF
225 file, into a newly allocated buffer, and return a pointer to the
229 elf_read (abfd, offset, size)
236 if ((buf = bfd_alloc (abfd, size)) == NULL)
238 if (bfd_seek (abfd, offset, SEEK_SET) == -1)
240 if (bfd_read ((PTR) buf, size, 1, abfd) != size)
242 if (bfd_get_error () != bfd_error_system_call)
243 bfd_set_error (bfd_error_file_truncated);
250 bfd_elf_mkobject (abfd)
253 /* this just does initialization */
254 /* coff_mkobject zalloc's space for tdata.coff_obj_data ... */
255 elf_tdata (abfd) = (struct elf_obj_tdata *)
256 bfd_zalloc (abfd, sizeof (struct elf_obj_tdata));
257 if (elf_tdata (abfd) == 0)
259 /* since everything is done at close time, do we need any
266 bfd_elf_get_str_section (abfd, shindex)
268 unsigned int shindex;
270 Elf_Internal_Shdr **i_shdrp;
271 char *shstrtab = NULL;
273 unsigned int shstrtabsize;
275 i_shdrp = elf_elfsections (abfd);
276 if (i_shdrp == 0 || i_shdrp[shindex] == 0)
279 shstrtab = (char *) i_shdrp[shindex]->contents;
280 if (shstrtab == NULL)
282 /* No cached one, attempt to read, and cache what we read. */
283 offset = i_shdrp[shindex]->sh_offset;
284 shstrtabsize = i_shdrp[shindex]->sh_size;
285 shstrtab = elf_read (abfd, offset, shstrtabsize);
286 i_shdrp[shindex]->contents = (PTR) shstrtab;
292 bfd_elf_string_from_elf_section (abfd, shindex, strindex)
294 unsigned int shindex;
295 unsigned int strindex;
297 Elf_Internal_Shdr *hdr;
302 hdr = elf_elfsections (abfd)[shindex];
304 if (hdr->contents == NULL
305 && bfd_elf_get_str_section (abfd, shindex) == NULL)
308 if (strindex >= hdr->sh_size)
310 (*_bfd_error_handler)
311 ("%s: invalid string offset %u >= %lu for section `%s'",
312 bfd_get_filename (abfd), strindex, (unsigned long) hdr->sh_size,
313 ((shindex == elf_elfheader(abfd)->e_shstrndx
314 && strindex == hdr->sh_name)
316 : elf_string_from_elf_strtab (abfd, hdr->sh_name)));
320 return ((char *) hdr->contents) + strindex;
323 /* Make a BFD section from an ELF section. We store a pointer to the
324 BFD section in the bfd_section field of the header. */
327 _bfd_elf_make_section_from_shdr (abfd, hdr, name)
329 Elf_Internal_Shdr *hdr;
335 if (hdr->bfd_section != NULL)
337 BFD_ASSERT (strcmp (name,
338 bfd_get_section_name (abfd, hdr->bfd_section)) == 0);
342 newsect = bfd_make_section_anyway (abfd, name);
346 newsect->filepos = hdr->sh_offset;
348 if (! bfd_set_section_vma (abfd, newsect, hdr->sh_addr)
349 || ! bfd_set_section_size (abfd, newsect, hdr->sh_size)
350 || ! bfd_set_section_alignment (abfd, newsect,
351 bfd_log2 (hdr->sh_addralign)))
354 flags = SEC_NO_FLAGS;
355 if (hdr->sh_type != SHT_NOBITS)
356 flags |= SEC_HAS_CONTENTS;
357 if ((hdr->sh_flags & SHF_ALLOC) != 0)
360 if (hdr->sh_type != SHT_NOBITS)
363 if ((hdr->sh_flags & SHF_WRITE) == 0)
364 flags |= SEC_READONLY;
365 if ((hdr->sh_flags & SHF_EXECINSTR) != 0)
367 else if ((flags & SEC_LOAD) != 0)
370 /* The debugging sections appear to be recognized only by name, not
372 if (strncmp (name, ".debug", sizeof ".debug" - 1) == 0
373 || strncmp (name, ".line", sizeof ".line" - 1) == 0
374 || strncmp (name, ".stab", sizeof ".stab" - 1) == 0)
375 flags |= SEC_DEBUGGING;
377 /* As a GNU extension, if the name begins with .gnu.linkonce, we
378 only link a single copy of the section. This is used to support
379 g++. g++ will emit each template expansion in its own section.
380 The symbols will be defined as weak, so that multiple definitions
381 are permitted. The GNU linker extension is to actually discard
382 all but one of the sections. */
383 if (strncmp (name, ".gnu.linkonce", sizeof ".gnu.linkonce" - 1) == 0)
384 flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
386 if (! bfd_set_section_flags (abfd, newsect, flags))
389 if ((flags & SEC_ALLOC) != 0)
391 Elf_Internal_Phdr *phdr;
394 /* Look through the phdrs to see if we need to adjust the lma. */
395 phdr = elf_tdata (abfd)->phdr;
396 for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
398 if (phdr->p_type == PT_LOAD
399 && phdr->p_paddr != 0
400 && phdr->p_vaddr != phdr->p_paddr
401 && phdr->p_vaddr <= hdr->sh_addr
402 && phdr->p_vaddr + phdr->p_memsz >= hdr->sh_addr + hdr->sh_size
403 && ((flags & SEC_LOAD) == 0
404 || (phdr->p_offset <= hdr->sh_offset
405 && (phdr->p_offset + phdr->p_filesz
406 >= hdr->sh_offset + hdr->sh_size))))
408 newsect->lma += phdr->p_paddr - phdr->p_vaddr;
414 hdr->bfd_section = newsect;
415 elf_section_data (newsect)->this_hdr = *hdr;
425 struct elf_internal_shdr *bfd_elf_find_section (bfd *abfd, char *name);
428 Helper functions for GDB to locate the string tables.
429 Since BFD hides string tables from callers, GDB needs to use an
430 internal hook to find them. Sun's .stabstr, in particular,
431 isn't even pointed to by the .stab section, so ordinary
432 mechanisms wouldn't work to find it, even if we had some.
435 struct elf_internal_shdr *
436 bfd_elf_find_section (abfd, name)
440 Elf_Internal_Shdr **i_shdrp;
445 i_shdrp = elf_elfsections (abfd);
448 shstrtab = bfd_elf_get_str_section (abfd, elf_elfheader (abfd)->e_shstrndx);
449 if (shstrtab != NULL)
451 max = elf_elfheader (abfd)->e_shnum;
452 for (i = 1; i < max; i++)
453 if (!strcmp (&shstrtab[i_shdrp[i]->sh_name], name))
460 const char *const bfd_elf_section_type_names[] = {
461 "SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB",
462 "SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE",
463 "SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM",
466 /* ELF relocs are against symbols. If we are producing relocateable
467 output, and the reloc is against an external symbol, and nothing
468 has given us any additional addend, the resulting reloc will also
469 be against the same symbol. In such a case, we don't want to
470 change anything about the way the reloc is handled, since it will
471 all be done at final link time. Rather than put special case code
472 into bfd_perform_relocation, all the reloc types use this howto
473 function. It just short circuits the reloc if producing
474 relocateable output against an external symbol. */
477 bfd_reloc_status_type
478 bfd_elf_generic_reloc (abfd,
486 arelent *reloc_entry;
489 asection *input_section;
491 char **error_message;
493 if (output_bfd != (bfd *) NULL
494 && (symbol->flags & BSF_SECTION_SYM) == 0
495 && (! reloc_entry->howto->partial_inplace
496 || reloc_entry->addend == 0))
498 reloc_entry->address += input_section->output_offset;
502 return bfd_reloc_continue;
505 /* Print out the program headers. */
508 _bfd_elf_print_private_bfd_data (abfd, farg)
512 FILE *f = (FILE *) farg;
513 Elf_Internal_Phdr *p;
515 bfd_byte *dynbuf = NULL;
517 p = elf_tdata (abfd)->phdr;
522 fprintf (f, "\nProgram Header:\n");
523 c = elf_elfheader (abfd)->e_phnum;
524 for (i = 0; i < c; i++, p++)
531 case PT_NULL: s = "NULL"; break;
532 case PT_LOAD: s = "LOAD"; break;
533 case PT_DYNAMIC: s = "DYNAMIC"; break;
534 case PT_INTERP: s = "INTERP"; break;
535 case PT_NOTE: s = "NOTE"; break;
536 case PT_SHLIB: s = "SHLIB"; break;
537 case PT_PHDR: s = "PHDR"; break;
538 default: sprintf (buf, "0x%lx", p->p_type); s = buf; break;
540 fprintf (f, "%8s off 0x", s);
541 fprintf_vma (f, p->p_offset);
542 fprintf (f, " vaddr 0x");
543 fprintf_vma (f, p->p_vaddr);
544 fprintf (f, " paddr 0x");
545 fprintf_vma (f, p->p_paddr);
546 fprintf (f, " align 2**%u\n", bfd_log2 (p->p_align));
547 fprintf (f, " filesz 0x");
548 fprintf_vma (f, p->p_filesz);
549 fprintf (f, " memsz 0x");
550 fprintf_vma (f, p->p_memsz);
551 fprintf (f, " flags %c%c%c",
552 (p->p_flags & PF_R) != 0 ? 'r' : '-',
553 (p->p_flags & PF_W) != 0 ? 'w' : '-',
554 (p->p_flags & PF_X) != 0 ? 'x' : '-');
555 if ((p->p_flags &~ (PF_R | PF_W | PF_X)) != 0)
556 fprintf (f, " %lx", p->p_flags &~ (PF_R | PF_W | PF_X));
561 s = bfd_get_section_by_name (abfd, ".dynamic");
566 bfd_byte *extdyn, *extdynend;
568 void (*swap_dyn_in) PARAMS ((bfd *, const PTR, Elf_Internal_Dyn *));
570 fprintf (f, "\nDynamic Section:\n");
572 dynbuf = (bfd_byte *) bfd_malloc (s->_raw_size);
575 if (! bfd_get_section_contents (abfd, s, (PTR) dynbuf, (file_ptr) 0,
579 elfsec = _bfd_elf_section_from_bfd_section (abfd, s);
582 link = elf_elfsections (abfd)[elfsec]->sh_link;
584 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
585 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
588 extdynend = extdyn + s->_raw_size;
589 for (; extdyn < extdynend; extdyn += extdynsize)
591 Elf_Internal_Dyn dyn;
596 (*swap_dyn_in) (abfd, (PTR) extdyn, &dyn);
598 if (dyn.d_tag == DT_NULL)
605 sprintf (ab, "0x%lx", (unsigned long) dyn.d_tag);
609 case DT_NEEDED: name = "NEEDED"; stringp = true; break;
610 case DT_PLTRELSZ: name = "PLTRELSZ"; break;
611 case DT_PLTGOT: name = "PLTGOT"; break;
612 case DT_HASH: name = "HASH"; break;
613 case DT_STRTAB: name = "STRTAB"; break;
614 case DT_SYMTAB: name = "SYMTAB"; break;
615 case DT_RELA: name = "RELA"; break;
616 case DT_RELASZ: name = "RELASZ"; break;
617 case DT_RELAENT: name = "RELAENT"; break;
618 case DT_STRSZ: name = "STRSZ"; break;
619 case DT_SYMENT: name = "SYMENT"; break;
620 case DT_INIT: name = "INIT"; break;
621 case DT_FINI: name = "FINI"; break;
622 case DT_SONAME: name = "SONAME"; stringp = true; break;
623 case DT_RPATH: name = "RPATH"; stringp = true; break;
624 case DT_SYMBOLIC: name = "SYMBOLIC"; break;
625 case DT_REL: name = "REL"; break;
626 case DT_RELSZ: name = "RELSZ"; break;
627 case DT_RELENT: name = "RELENT"; break;
628 case DT_PLTREL: name = "PLTREL"; break;
629 case DT_DEBUG: name = "DEBUG"; break;
630 case DT_TEXTREL: name = "TEXTREL"; break;
631 case DT_JMPREL: name = "JMPREL"; break;
632 case DT_AUXILIARY: name = "AUXILIARY"; stringp = true; break;
633 case DT_FILTER: name = "FILTER"; stringp = true; break;
634 case DT_VERSYM: name = "VERSYM"; break;
635 case DT_VERDEF: name = "VERDEF"; break;
636 case DT_VERDEFNUM: name = "VERDEFNUM"; break;
637 case DT_VERNEED: name = "VERNEED"; break;
638 case DT_VERNEEDNUM: name = "VERNEEDNUM"; break;
641 fprintf (f, " %-11s ", name);
643 fprintf (f, "0x%lx", (unsigned long) dyn.d_un.d_val);
648 string = bfd_elf_string_from_elf_section (abfd, link,
652 fprintf (f, "%s", string);
661 if ((elf_dynverdef (abfd) != 0 && elf_tdata (abfd)->verdef == NULL)
662 || (elf_dynverref (abfd) != 0 && elf_tdata (abfd)->verref == NULL))
664 if (! _bfd_elf_slurp_version_tables (abfd))
668 if (elf_dynverdef (abfd) != 0)
670 Elf_Internal_Verdef *t;
672 fprintf (f, "\nVersion definitions:\n");
673 for (t = elf_tdata (abfd)->verdef; t != NULL; t = t->vd_nextdef)
675 fprintf (f, "%d 0x%2.2x 0x%8.8lx %s\n", t->vd_ndx,
676 t->vd_flags, t->vd_hash, t->vd_nodename);
677 if (t->vd_auxptr->vda_nextptr != NULL)
679 Elf_Internal_Verdaux *a;
682 for (a = t->vd_auxptr->vda_nextptr;
685 fprintf (f, "%s ", a->vda_nodename);
691 if (elf_dynverref (abfd) != 0)
693 Elf_Internal_Verneed *t;
695 fprintf (f, "\nVersion References:\n");
696 for (t = elf_tdata (abfd)->verref; t != NULL; t = t->vn_nextref)
698 Elf_Internal_Vernaux *a;
700 fprintf (f, " required from %s:\n", t->vn_filename);
701 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
702 fprintf (f, " 0x%8.8lx 0x%2.2x %2.2d %s\n", a->vna_hash,
703 a->vna_flags, a->vna_other, a->vna_nodename);
715 /* Display ELF-specific fields of a symbol. */
718 bfd_elf_print_symbol (abfd, filep, symbol, how)
722 bfd_print_symbol_type how;
724 FILE *file = (FILE *) filep;
727 case bfd_print_symbol_name:
728 fprintf (file, "%s", symbol->name);
730 case bfd_print_symbol_more:
731 fprintf (file, "elf ");
732 fprintf_vma (file, symbol->value);
733 fprintf (file, " %lx", (long) symbol->flags);
735 case bfd_print_symbol_all:
737 CONST char *section_name;
738 section_name = symbol->section ? symbol->section->name : "(*none*)";
739 bfd_print_symbol_vandf ((PTR) file, symbol);
740 fprintf (file, " %s\t", section_name);
741 /* Print the "other" value for a symbol. For common symbols,
742 we've already printed the size; now print the alignment.
743 For other symbols, we have no specified alignment, and
744 we've printed the address; now print the size. */
746 (bfd_is_com_section (symbol->section)
747 ? ((elf_symbol_type *) symbol)->internal_elf_sym.st_value
748 : ((elf_symbol_type *) symbol)->internal_elf_sym.st_size));
750 /* If we have version information, print it. */
751 if (elf_tdata (abfd)->dynversym_section != 0
752 && (elf_tdata (abfd)->dynverdef_section != 0
753 || elf_tdata (abfd)->dynverref_section != 0))
756 const char *version_string;
758 vernum = ((elf_symbol_type *) symbol)->version & VERSYM_VERSION;
762 else if (vernum == 1)
763 version_string = "Base";
764 else if (vernum <= elf_tdata (abfd)->cverdefs)
766 elf_tdata (abfd)->verdef[vernum - 1].vd_nodename;
769 Elf_Internal_Verneed *t;
772 for (t = elf_tdata (abfd)->verref;
776 Elf_Internal_Vernaux *a;
778 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
780 if (a->vna_other == vernum)
782 version_string = a->vna_nodename;
789 if ((((elf_symbol_type *) symbol)->version & VERSYM_HIDDEN) == 0)
790 fprintf (file, " %-11s", version_string);
795 fprintf (file, " (%s)", version_string);
796 for (i = 10 - strlen (version_string); i > 0; --i)
801 /* If the st_other field is not zero, print it. */
802 if (((elf_symbol_type *) symbol)->internal_elf_sym.st_other != 0)
803 fprintf (file, " 0x%02x",
805 ((elf_symbol_type *) symbol)->internal_elf_sym.st_other));
807 fprintf (file, " %s", symbol->name);
813 /* Create an entry in an ELF linker hash table. */
815 struct bfd_hash_entry *
816 _bfd_elf_link_hash_newfunc (entry, table, string)
817 struct bfd_hash_entry *entry;
818 struct bfd_hash_table *table;
821 struct elf_link_hash_entry *ret = (struct elf_link_hash_entry *) entry;
823 /* Allocate the structure if it has not already been allocated by a
825 if (ret == (struct elf_link_hash_entry *) NULL)
826 ret = ((struct elf_link_hash_entry *)
827 bfd_hash_allocate (table, sizeof (struct elf_link_hash_entry)));
828 if (ret == (struct elf_link_hash_entry *) NULL)
829 return (struct bfd_hash_entry *) ret;
831 /* Call the allocation method of the superclass. */
832 ret = ((struct elf_link_hash_entry *)
833 _bfd_link_hash_newfunc ((struct bfd_hash_entry *) ret,
835 if (ret != (struct elf_link_hash_entry *) NULL)
837 /* Set local fields. */
841 ret->dynstr_index = 0;
843 ret->got_offset = (bfd_vma) -1;
844 ret->plt_offset = (bfd_vma) -1;
845 ret->linker_section_pointer = (elf_linker_section_pointers_t *)0;
846 ret->verinfo.verdef = NULL;
847 ret->type = STT_NOTYPE;
849 /* Assume that we have been called by a non-ELF symbol reader.
850 This flag is then reset by the code which reads an ELF input
851 file. This ensures that a symbol created by a non-ELF symbol
852 reader will have the flag set correctly. */
853 ret->elf_link_hash_flags = ELF_LINK_NON_ELF;
856 return (struct bfd_hash_entry *) ret;
859 /* Initialize an ELF linker hash table. */
862 _bfd_elf_link_hash_table_init (table, abfd, newfunc)
863 struct elf_link_hash_table *table;
865 struct bfd_hash_entry *(*newfunc) PARAMS ((struct bfd_hash_entry *,
866 struct bfd_hash_table *,
869 table->dynamic_sections_created = false;
870 table->dynobj = NULL;
871 /* The first dynamic symbol is a dummy. */
872 table->dynsymcount = 1;
873 table->dynstr = NULL;
874 table->bucketcount = 0;
875 table->needed = NULL;
877 table->stab_info = NULL;
878 return _bfd_link_hash_table_init (&table->root, abfd, newfunc);
881 /* Create an ELF linker hash table. */
883 struct bfd_link_hash_table *
884 _bfd_elf_link_hash_table_create (abfd)
887 struct elf_link_hash_table *ret;
889 ret = ((struct elf_link_hash_table *)
890 bfd_alloc (abfd, sizeof (struct elf_link_hash_table)));
891 if (ret == (struct elf_link_hash_table *) NULL)
894 if (! _bfd_elf_link_hash_table_init (ret, abfd, _bfd_elf_link_hash_newfunc))
896 bfd_release (abfd, ret);
903 /* This is a hook for the ELF emulation code in the generic linker to
904 tell the backend linker what file name to use for the DT_NEEDED
905 entry for a dynamic object. The generic linker passes name as an
906 empty string to indicate that no DT_NEEDED entry should be made. */
909 bfd_elf_set_dt_needed_name (abfd, name)
913 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
914 && bfd_get_format (abfd) == bfd_object)
915 elf_dt_name (abfd) = name;
918 /* Get the list of DT_NEEDED entries for a link. This is a hook for
919 the ELF emulation code. */
921 struct bfd_link_needed_list *
922 bfd_elf_get_needed_list (abfd, info)
924 struct bfd_link_info *info;
926 if (info->hash->creator->flavour != bfd_target_elf_flavour)
928 return elf_hash_table (info)->needed;
931 /* Get the name actually used for a dynamic object for a link. This
932 is the SONAME entry if there is one. Otherwise, it is the string
933 passed to bfd_elf_set_dt_needed_name, or it is the filename. */
936 bfd_elf_get_dt_soname (abfd)
939 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
940 && bfd_get_format (abfd) == bfd_object)
941 return elf_dt_name (abfd);
945 /* Allocate an ELF string table--force the first byte to be zero. */
947 struct bfd_strtab_hash *
948 _bfd_elf_stringtab_init ()
950 struct bfd_strtab_hash *ret;
952 ret = _bfd_stringtab_init ();
957 loc = _bfd_stringtab_add (ret, "", true, false);
958 BFD_ASSERT (loc == 0 || loc == (bfd_size_type) -1);
959 if (loc == (bfd_size_type) -1)
961 _bfd_stringtab_free (ret);
968 /* ELF .o/exec file reading */
970 /* Create a new bfd section from an ELF section header. */
973 bfd_section_from_shdr (abfd, shindex)
975 unsigned int shindex;
977 Elf_Internal_Shdr *hdr = elf_elfsections (abfd)[shindex];
978 Elf_Internal_Ehdr *ehdr = elf_elfheader (abfd);
979 struct elf_backend_data *bed = get_elf_backend_data (abfd);
982 name = elf_string_from_elf_strtab (abfd, hdr->sh_name);
984 switch (hdr->sh_type)
987 /* Inactive section. Throw it away. */
990 case SHT_PROGBITS: /* Normal section with contents. */
991 case SHT_DYNAMIC: /* Dynamic linking information. */
992 case SHT_NOBITS: /* .bss section. */
993 case SHT_HASH: /* .hash section. */
994 case SHT_NOTE: /* .note section. */
995 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
997 case SHT_SYMTAB: /* A symbol table */
998 if (elf_onesymtab (abfd) == shindex)
1001 BFD_ASSERT (hdr->sh_entsize == bed->s->sizeof_sym);
1002 BFD_ASSERT (elf_onesymtab (abfd) == 0);
1003 elf_onesymtab (abfd) = shindex;
1004 elf_tdata (abfd)->symtab_hdr = *hdr;
1005 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->symtab_hdr;
1006 abfd->flags |= HAS_SYMS;
1008 /* Sometimes a shared object will map in the symbol table. If
1009 SHF_ALLOC is set, and this is a shared object, then we also
1010 treat this section as a BFD section. We can not base the
1011 decision purely on SHF_ALLOC, because that flag is sometimes
1012 set in a relocateable object file, which would confuse the
1014 if ((hdr->sh_flags & SHF_ALLOC) != 0
1015 && (abfd->flags & DYNAMIC) != 0
1016 && ! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
1021 case SHT_DYNSYM: /* A dynamic symbol table */
1022 if (elf_dynsymtab (abfd) == shindex)
1025 BFD_ASSERT (hdr->sh_entsize == bed->s->sizeof_sym);
1026 BFD_ASSERT (elf_dynsymtab (abfd) == 0);
1027 elf_dynsymtab (abfd) = shindex;
1028 elf_tdata (abfd)->dynsymtab_hdr = *hdr;
1029 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->dynsymtab_hdr;
1030 abfd->flags |= HAS_SYMS;
1032 /* Besides being a symbol table, we also treat this as a regular
1033 section, so that objcopy can handle it. */
1034 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1036 case SHT_STRTAB: /* A string table */
1037 if (hdr->bfd_section != NULL)
1039 if (ehdr->e_shstrndx == shindex)
1041 elf_tdata (abfd)->shstrtab_hdr = *hdr;
1042 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->shstrtab_hdr;
1048 for (i = 1; i < ehdr->e_shnum; i++)
1050 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1051 if (hdr2->sh_link == shindex)
1053 if (! bfd_section_from_shdr (abfd, i))
1055 if (elf_onesymtab (abfd) == i)
1057 elf_tdata (abfd)->strtab_hdr = *hdr;
1058 elf_elfsections (abfd)[shindex] =
1059 &elf_tdata (abfd)->strtab_hdr;
1062 if (elf_dynsymtab (abfd) == i)
1064 elf_tdata (abfd)->dynstrtab_hdr = *hdr;
1065 elf_elfsections (abfd)[shindex] = hdr =
1066 &elf_tdata (abfd)->dynstrtab_hdr;
1067 /* We also treat this as a regular section, so
1068 that objcopy can handle it. */
1071 #if 0 /* Not handling other string tables specially right now. */
1072 hdr2 = elf_elfsections (abfd)[i]; /* in case it moved */
1073 /* We have a strtab for some random other section. */
1074 newsect = (asection *) hdr2->bfd_section;
1077 hdr->bfd_section = newsect;
1078 hdr2 = &elf_section_data (newsect)->str_hdr;
1080 elf_elfsections (abfd)[shindex] = hdr2;
1086 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1090 /* *These* do a lot of work -- but build no sections! */
1092 asection *target_sect;
1093 Elf_Internal_Shdr *hdr2;
1095 /* For some incomprehensible reason Oracle distributes
1096 libraries for Solaris in which some of the objects have
1097 bogus sh_link fields. It would be nice if we could just
1098 reject them, but, unfortunately, some people need to use
1099 them. We scan through the section headers; if we find only
1100 one suitable symbol table, we clobber the sh_link to point
1101 to it. I hope this doesn't break anything. */
1102 if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_SYMTAB
1103 && elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_DYNSYM)
1109 for (scan = 1; scan < ehdr->e_shnum; scan++)
1111 if (elf_elfsections (abfd)[scan]->sh_type == SHT_SYMTAB
1112 || elf_elfsections (abfd)[scan]->sh_type == SHT_DYNSYM)
1123 hdr->sh_link = found;
1126 /* Get the symbol table. */
1127 if (elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_SYMTAB
1128 && ! bfd_section_from_shdr (abfd, hdr->sh_link))
1131 /* If this reloc section does not use the main symbol table we
1132 don't treat it as a reloc section. BFD can't adequately
1133 represent such a section, so at least for now, we don't
1134 try. We just present it as a normal section. */
1135 if (hdr->sh_link != elf_onesymtab (abfd))
1136 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1138 if (! bfd_section_from_shdr (abfd, hdr->sh_info))
1140 target_sect = bfd_section_from_elf_index (abfd, hdr->sh_info);
1141 if (target_sect == NULL)
1144 if ((target_sect->flags & SEC_RELOC) == 0
1145 || target_sect->reloc_count == 0)
1146 hdr2 = &elf_section_data (target_sect)->rel_hdr;
1149 BFD_ASSERT (elf_section_data (target_sect)->rel_hdr2 == NULL);
1150 hdr2 = (Elf_Internal_Shdr *) bfd_alloc (abfd, sizeof (*hdr2));
1151 elf_section_data (target_sect)->rel_hdr2 = hdr2;
1154 elf_elfsections (abfd)[shindex] = hdr2;
1155 target_sect->reloc_count += hdr->sh_size / hdr->sh_entsize;
1156 target_sect->flags |= SEC_RELOC;
1157 target_sect->relocation = NULL;
1158 target_sect->rel_filepos = hdr->sh_offset;
1159 abfd->flags |= HAS_RELOC;
1164 case SHT_GNU_verdef:
1165 elf_dynverdef (abfd) = shindex;
1166 elf_tdata (abfd)->dynverdef_hdr = *hdr;
1167 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1170 case SHT_GNU_versym:
1171 elf_dynversym (abfd) = shindex;
1172 elf_tdata (abfd)->dynversym_hdr = *hdr;
1173 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1176 case SHT_GNU_verneed:
1177 elf_dynverref (abfd) = shindex;
1178 elf_tdata (abfd)->dynverref_hdr = *hdr;
1179 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1186 /* Check for any processor-specific section types. */
1188 if (bed->elf_backend_section_from_shdr)
1189 (*bed->elf_backend_section_from_shdr) (abfd, hdr, name);
1197 /* Given an ELF section number, retrieve the corresponding BFD
1201 bfd_section_from_elf_index (abfd, index)
1205 BFD_ASSERT (index > 0 && index < SHN_LORESERVE);
1206 if (index >= elf_elfheader (abfd)->e_shnum)
1208 return elf_elfsections (abfd)[index]->bfd_section;
1212 _bfd_elf_new_section_hook (abfd, sec)
1216 struct bfd_elf_section_data *sdata;
1218 sdata = (struct bfd_elf_section_data *) bfd_alloc (abfd, sizeof (*sdata));
1221 sec->used_by_bfd = (PTR) sdata;
1222 memset (sdata, 0, sizeof (*sdata));
1226 /* Create a new bfd section from an ELF program header.
1228 Since program segments have no names, we generate a synthetic name
1229 of the form segment<NUM>, where NUM is generally the index in the
1230 program header table. For segments that are split (see below) we
1231 generate the names segment<NUM>a and segment<NUM>b.
1233 Note that some program segments may have a file size that is different than
1234 (less than) the memory size. All this means is that at execution the
1235 system must allocate the amount of memory specified by the memory size,
1236 but only initialize it with the first "file size" bytes read from the
1237 file. This would occur for example, with program segments consisting
1238 of combined data+bss.
1240 To handle the above situation, this routine generates TWO bfd sections
1241 for the single program segment. The first has the length specified by
1242 the file size of the segment, and the second has the length specified
1243 by the difference between the two sizes. In effect, the segment is split
1244 into it's initialized and uninitialized parts.
1249 bfd_section_from_phdr (abfd, hdr, index)
1251 Elf_Internal_Phdr *hdr;
1259 split = ((hdr->p_memsz > 0) &&
1260 (hdr->p_filesz > 0) &&
1261 (hdr->p_memsz > hdr->p_filesz));
1262 sprintf (namebuf, split ? "segment%da" : "segment%d", index);
1263 name = bfd_alloc (abfd, strlen (namebuf) + 1);
1266 strcpy (name, namebuf);
1267 newsect = bfd_make_section (abfd, name);
1268 if (newsect == NULL)
1270 newsect->vma = hdr->p_vaddr;
1271 newsect->lma = hdr->p_paddr;
1272 newsect->_raw_size = hdr->p_filesz;
1273 newsect->filepos = hdr->p_offset;
1274 newsect->flags |= SEC_HAS_CONTENTS;
1275 if (hdr->p_type == PT_LOAD)
1277 newsect->flags |= SEC_ALLOC;
1278 newsect->flags |= SEC_LOAD;
1279 if (hdr->p_flags & PF_X)
1281 /* FIXME: all we known is that it has execute PERMISSION,
1283 newsect->flags |= SEC_CODE;
1286 if (!(hdr->p_flags & PF_W))
1288 newsect->flags |= SEC_READONLY;
1293 sprintf (namebuf, "segment%db", index);
1294 name = bfd_alloc (abfd, strlen (namebuf) + 1);
1297 strcpy (name, namebuf);
1298 newsect = bfd_make_section (abfd, name);
1299 if (newsect == NULL)
1301 newsect->vma = hdr->p_vaddr + hdr->p_filesz;
1302 newsect->lma = hdr->p_paddr + hdr->p_filesz;
1303 newsect->_raw_size = hdr->p_memsz - hdr->p_filesz;
1304 if (hdr->p_type == PT_LOAD)
1306 newsect->flags |= SEC_ALLOC;
1307 if (hdr->p_flags & PF_X)
1308 newsect->flags |= SEC_CODE;
1310 if (!(hdr->p_flags & PF_W))
1311 newsect->flags |= SEC_READONLY;
1317 /* Set up an ELF internal section header for a section. */
1321 elf_fake_sections (abfd, asect, failedptrarg)
1326 struct elf_backend_data *bed = get_elf_backend_data (abfd);
1327 boolean *failedptr = (boolean *) failedptrarg;
1328 Elf_Internal_Shdr *this_hdr;
1332 /* We already failed; just get out of the bfd_map_over_sections
1337 this_hdr = &elf_section_data (asect)->this_hdr;
1339 this_hdr->sh_name = (unsigned long) _bfd_stringtab_add (elf_shstrtab (abfd),
1342 if (this_hdr->sh_name == (unsigned long) -1)
1348 this_hdr->sh_flags = 0;
1350 if ((asect->flags & SEC_ALLOC) != 0
1351 || asect->user_set_vma)
1352 this_hdr->sh_addr = asect->vma;
1354 this_hdr->sh_addr = 0;
1356 this_hdr->sh_offset = 0;
1357 this_hdr->sh_size = asect->_raw_size;
1358 this_hdr->sh_link = 0;
1359 this_hdr->sh_addralign = 1 << asect->alignment_power;
1360 /* The sh_entsize and sh_info fields may have been set already by
1361 copy_private_section_data. */
1363 this_hdr->bfd_section = asect;
1364 this_hdr->contents = NULL;
1366 /* FIXME: This should not be based on section names. */
1367 if (strcmp (asect->name, ".dynstr") == 0)
1368 this_hdr->sh_type = SHT_STRTAB;
1369 else if (strcmp (asect->name, ".hash") == 0)
1371 this_hdr->sh_type = SHT_HASH;
1372 this_hdr->sh_entsize = bed->s->arch_size / 8;
1374 else if (strcmp (asect->name, ".dynsym") == 0)
1376 this_hdr->sh_type = SHT_DYNSYM;
1377 this_hdr->sh_entsize = bed->s->sizeof_sym;
1379 else if (strcmp (asect->name, ".dynamic") == 0)
1381 this_hdr->sh_type = SHT_DYNAMIC;
1382 this_hdr->sh_entsize = bed->s->sizeof_dyn;
1384 else if (strncmp (asect->name, ".rela", 5) == 0
1385 && get_elf_backend_data (abfd)->use_rela_p)
1387 this_hdr->sh_type = SHT_RELA;
1388 this_hdr->sh_entsize = bed->s->sizeof_rela;
1390 else if (strncmp (asect->name, ".rel", 4) == 0
1391 && ! get_elf_backend_data (abfd)->use_rela_p)
1393 this_hdr->sh_type = SHT_REL;
1394 this_hdr->sh_entsize = bed->s->sizeof_rel;
1396 else if (strncmp (asect->name, ".note", 5) == 0)
1397 this_hdr->sh_type = SHT_NOTE;
1398 else if (strncmp (asect->name, ".stab", 5) == 0
1399 && strcmp (asect->name + strlen (asect->name) - 3, "str") == 0)
1400 this_hdr->sh_type = SHT_STRTAB;
1401 else if (strcmp (asect->name, ".gnu.version") == 0)
1403 this_hdr->sh_type = SHT_GNU_versym;
1404 this_hdr->sh_entsize = sizeof (Elf_External_Versym);
1406 else if (strcmp (asect->name, ".gnu.version_d") == 0)
1408 this_hdr->sh_type = SHT_GNU_verdef;
1409 this_hdr->sh_entsize = 0;
1410 /* objcopy or strip will copy over sh_info, but may not set
1411 cverdefs. The linker will set cverdefs, but sh_info will be
1413 if (this_hdr->sh_info == 0)
1414 this_hdr->sh_info = elf_tdata (abfd)->cverdefs;
1416 BFD_ASSERT (elf_tdata (abfd)->cverdefs == 0
1417 || this_hdr->sh_info == elf_tdata (abfd)->cverdefs);
1419 else if (strcmp (asect->name, ".gnu.version_r") == 0)
1421 this_hdr->sh_type = SHT_GNU_verneed;
1422 this_hdr->sh_entsize = 0;
1423 /* objcopy or strip will copy over sh_info, but may not set
1424 cverrefs. The linker will set cverrefs, but sh_info will be
1426 if (this_hdr->sh_info == 0)
1427 this_hdr->sh_info = elf_tdata (abfd)->cverrefs;
1429 BFD_ASSERT (elf_tdata (abfd)->cverrefs == 0
1430 || this_hdr->sh_info == elf_tdata (abfd)->cverrefs);
1432 else if ((asect->flags & SEC_ALLOC) != 0
1433 && (asect->flags & SEC_LOAD) != 0)
1434 this_hdr->sh_type = SHT_PROGBITS;
1435 else if ((asect->flags & SEC_ALLOC) != 0
1436 && ((asect->flags & SEC_LOAD) == 0))
1437 this_hdr->sh_type = SHT_NOBITS;
1441 this_hdr->sh_type = SHT_PROGBITS;
1444 if ((asect->flags & SEC_ALLOC) != 0)
1445 this_hdr->sh_flags |= SHF_ALLOC;
1446 if ((asect->flags & SEC_READONLY) == 0)
1447 this_hdr->sh_flags |= SHF_WRITE;
1448 if ((asect->flags & SEC_CODE) != 0)
1449 this_hdr->sh_flags |= SHF_EXECINSTR;
1451 /* Check for processor-specific section types. */
1453 struct elf_backend_data *bed = get_elf_backend_data (abfd);
1455 if (bed->elf_backend_fake_sections)
1456 (*bed->elf_backend_fake_sections) (abfd, this_hdr, asect);
1459 /* If the section has relocs, set up a section header for the
1460 SHT_REL[A] section. */
1461 if ((asect->flags & SEC_RELOC) != 0)
1463 Elf_Internal_Shdr *rela_hdr;
1464 int use_rela_p = get_elf_backend_data (abfd)->use_rela_p;
1467 rela_hdr = &elf_section_data (asect)->rel_hdr;
1468 name = bfd_alloc (abfd, sizeof ".rela" + strlen (asect->name));
1474 sprintf (name, "%s%s", use_rela_p ? ".rela" : ".rel", asect->name);
1476 (unsigned int) _bfd_stringtab_add (elf_shstrtab (abfd), name,
1478 if (rela_hdr->sh_name == (unsigned int) -1)
1483 rela_hdr->sh_type = use_rela_p ? SHT_RELA : SHT_REL;
1484 rela_hdr->sh_entsize = (use_rela_p
1485 ? bed->s->sizeof_rela
1486 : bed->s->sizeof_rel);
1487 rela_hdr->sh_addralign = bed->s->file_align;
1488 rela_hdr->sh_flags = 0;
1489 rela_hdr->sh_addr = 0;
1490 rela_hdr->sh_size = 0;
1491 rela_hdr->sh_offset = 0;
1495 /* Assign all ELF section numbers. The dummy first section is handled here
1496 too. The link/info pointers for the standard section types are filled
1497 in here too, while we're at it. */
1500 assign_section_numbers (abfd)
1503 struct elf_obj_tdata *t = elf_tdata (abfd);
1505 unsigned int section_number;
1506 Elf_Internal_Shdr **i_shdrp;
1507 struct elf_backend_data *bed = get_elf_backend_data (abfd);
1511 for (sec = abfd->sections; sec; sec = sec->next)
1513 struct bfd_elf_section_data *d = elf_section_data (sec);
1515 d->this_idx = section_number++;
1516 if ((sec->flags & SEC_RELOC) == 0)
1519 d->rel_idx = section_number++;
1522 t->shstrtab_section = section_number++;
1523 elf_elfheader (abfd)->e_shstrndx = t->shstrtab_section;
1524 t->shstrtab_hdr.sh_size = _bfd_stringtab_size (elf_shstrtab (abfd));
1526 if (abfd->symcount > 0)
1528 t->symtab_section = section_number++;
1529 t->strtab_section = section_number++;
1532 elf_elfheader (abfd)->e_shnum = section_number;
1534 /* Set up the list of section header pointers, in agreement with the
1536 i_shdrp = ((Elf_Internal_Shdr **)
1537 bfd_alloc (abfd, section_number * sizeof (Elf_Internal_Shdr *)));
1538 if (i_shdrp == NULL)
1541 i_shdrp[0] = ((Elf_Internal_Shdr *)
1542 bfd_alloc (abfd, sizeof (Elf_Internal_Shdr)));
1543 if (i_shdrp[0] == NULL)
1545 bfd_release (abfd, i_shdrp);
1548 memset (i_shdrp[0], 0, sizeof (Elf_Internal_Shdr));
1550 elf_elfsections (abfd) = i_shdrp;
1552 i_shdrp[t->shstrtab_section] = &t->shstrtab_hdr;
1553 if (abfd->symcount > 0)
1555 i_shdrp[t->symtab_section] = &t->symtab_hdr;
1556 i_shdrp[t->strtab_section] = &t->strtab_hdr;
1557 t->symtab_hdr.sh_link = t->strtab_section;
1559 for (sec = abfd->sections; sec; sec = sec->next)
1561 struct bfd_elf_section_data *d = elf_section_data (sec);
1565 i_shdrp[d->this_idx] = &d->this_hdr;
1566 if (d->rel_idx != 0)
1567 i_shdrp[d->rel_idx] = &d->rel_hdr;
1569 /* Fill in the sh_link and sh_info fields while we're at it. */
1571 /* sh_link of a reloc section is the section index of the symbol
1572 table. sh_info is the section index of the section to which
1573 the relocation entries apply. */
1574 if (d->rel_idx != 0)
1576 d->rel_hdr.sh_link = t->symtab_section;
1577 d->rel_hdr.sh_info = d->this_idx;
1580 switch (d->this_hdr.sh_type)
1584 /* A reloc section which we are treating as a normal BFD
1585 section. sh_link is the section index of the symbol
1586 table. sh_info is the section index of the section to
1587 which the relocation entries apply. We assume that an
1588 allocated reloc section uses the dynamic symbol table.
1589 FIXME: How can we be sure? */
1590 s = bfd_get_section_by_name (abfd, ".dynsym");
1592 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
1594 /* We look up the section the relocs apply to by name. */
1596 if (d->this_hdr.sh_type == SHT_REL)
1600 s = bfd_get_section_by_name (abfd, name);
1602 d->this_hdr.sh_info = elf_section_data (s)->this_idx;
1606 /* We assume that a section named .stab*str is a stabs
1607 string section. We look for a section with the same name
1608 but without the trailing ``str'', and set its sh_link
1609 field to point to this section. */
1610 if (strncmp (sec->name, ".stab", sizeof ".stab" - 1) == 0
1611 && strcmp (sec->name + strlen (sec->name) - 3, "str") == 0)
1616 len = strlen (sec->name);
1617 alc = (char *) bfd_malloc (len - 2);
1620 strncpy (alc, sec->name, len - 3);
1621 alc[len - 3] = '\0';
1622 s = bfd_get_section_by_name (abfd, alc);
1626 elf_section_data (s)->this_hdr.sh_link = d->this_idx;
1628 /* This is a .stab section. */
1629 elf_section_data (s)->this_hdr.sh_entsize =
1630 4 + 2 * (bed->s->arch_size / 8);
1637 case SHT_GNU_verneed:
1638 case SHT_GNU_verdef:
1639 /* sh_link is the section header index of the string table
1640 used for the dynamic entries, or the symbol table, or the
1642 s = bfd_get_section_by_name (abfd, ".dynstr");
1644 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
1648 case SHT_GNU_versym:
1649 /* sh_link is the section header index of the symbol table
1650 this hash table or version table is for. */
1651 s = bfd_get_section_by_name (abfd, ".dynsym");
1653 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
1661 /* Map symbol from it's internal number to the external number, moving
1662 all local symbols to be at the head of the list. */
1665 sym_is_global (abfd, sym)
1669 /* If the backend has a special mapping, use it. */
1670 if (get_elf_backend_data (abfd)->elf_backend_sym_is_global)
1671 return ((*get_elf_backend_data (abfd)->elf_backend_sym_is_global)
1674 return ((sym->flags & (BSF_GLOBAL | BSF_WEAK)) != 0
1675 || bfd_is_und_section (bfd_get_section (sym))
1676 || bfd_is_com_section (bfd_get_section (sym)));
1680 elf_map_symbols (abfd)
1683 int symcount = bfd_get_symcount (abfd);
1684 asymbol **syms = bfd_get_outsymbols (abfd);
1685 asymbol **sect_syms;
1687 int num_globals = 0;
1688 int num_locals2 = 0;
1689 int num_globals2 = 0;
1691 int num_sections = 0;
1697 fprintf (stderr, "elf_map_symbols\n");
1701 /* Add a section symbol for each BFD section. FIXME: Is this really
1703 for (asect = abfd->sections; asect; asect = asect->next)
1705 if (max_index < asect->index)
1706 max_index = asect->index;
1710 sect_syms = (asymbol **) bfd_zalloc (abfd, max_index * sizeof (asymbol *));
1711 if (sect_syms == NULL)
1713 elf_section_syms (abfd) = sect_syms;
1715 for (idx = 0; idx < symcount; idx++)
1717 if ((syms[idx]->flags & BSF_SECTION_SYM) != 0
1718 && (syms[idx]->value + syms[idx]->section->vma) == 0)
1722 sec = syms[idx]->section;
1723 if (sec->owner != NULL)
1725 if (sec->owner != abfd)
1727 if (sec->output_offset != 0)
1729 sec = sec->output_section;
1730 BFD_ASSERT (sec->owner == abfd);
1732 sect_syms[sec->index] = syms[idx];
1737 for (asect = abfd->sections; asect; asect = asect->next)
1741 if (sect_syms[asect->index] != NULL)
1744 sym = bfd_make_empty_symbol (abfd);
1747 sym->the_bfd = abfd;
1748 sym->name = asect->name;
1750 /* Set the flags to 0 to indicate that this one was newly added. */
1752 sym->section = asect;
1753 sect_syms[asect->index] = sym;
1757 "creating section symbol, name = %s, value = 0x%.8lx, index = %d, section = 0x%.8lx\n",
1758 asect->name, (long) asect->vma, asect->index, (long) asect);
1762 /* Classify all of the symbols. */
1763 for (idx = 0; idx < symcount; idx++)
1765 if (!sym_is_global (abfd, syms[idx]))
1770 for (asect = abfd->sections; asect; asect = asect->next)
1772 if (sect_syms[asect->index] != NULL
1773 && sect_syms[asect->index]->flags == 0)
1775 sect_syms[asect->index]->flags = BSF_SECTION_SYM;
1776 if (!sym_is_global (abfd, sect_syms[asect->index]))
1780 sect_syms[asect->index]->flags = 0;
1784 /* Now sort the symbols so the local symbols are first. */
1785 new_syms = ((asymbol **)
1787 (num_locals + num_globals) * sizeof (asymbol *)));
1788 if (new_syms == NULL)
1791 for (idx = 0; idx < symcount; idx++)
1793 asymbol *sym = syms[idx];
1796 if (!sym_is_global (abfd, sym))
1799 i = num_locals + num_globals2++;
1801 sym->udata.i = i + 1;
1803 for (asect = abfd->sections; asect; asect = asect->next)
1805 if (sect_syms[asect->index] != NULL
1806 && sect_syms[asect->index]->flags == 0)
1808 asymbol *sym = sect_syms[asect->index];
1811 sym->flags = BSF_SECTION_SYM;
1812 if (!sym_is_global (abfd, sym))
1815 i = num_locals + num_globals2++;
1817 sym->udata.i = i + 1;
1821 bfd_set_symtab (abfd, new_syms, num_locals + num_globals);
1823 elf_num_locals (abfd) = num_locals;
1824 elf_num_globals (abfd) = num_globals;
1828 /* Align to the maximum file alignment that could be required for any
1829 ELF data structure. */
1831 static INLINE file_ptr align_file_position PARAMS ((file_ptr, int));
1832 static INLINE file_ptr
1833 align_file_position (off, align)
1837 return (off + align - 1) & ~(align - 1);
1840 /* Assign a file position to a section, optionally aligning to the
1841 required section alignment. */
1844 _bfd_elf_assign_file_position_for_section (i_shdrp, offset, align)
1845 Elf_Internal_Shdr *i_shdrp;
1853 al = i_shdrp->sh_addralign;
1855 offset = BFD_ALIGN (offset, al);
1857 i_shdrp->sh_offset = offset;
1858 if (i_shdrp->bfd_section != NULL)
1859 i_shdrp->bfd_section->filepos = offset;
1860 if (i_shdrp->sh_type != SHT_NOBITS)
1861 offset += i_shdrp->sh_size;
1865 /* Compute the file positions we are going to put the sections at, and
1866 otherwise prepare to begin writing out the ELF file. If LINK_INFO
1867 is not NULL, this is being called by the ELF backend linker. */
1870 _bfd_elf_compute_section_file_positions (abfd, link_info)
1872 struct bfd_link_info *link_info;
1874 struct elf_backend_data *bed = get_elf_backend_data (abfd);
1876 struct bfd_strtab_hash *strtab;
1877 Elf_Internal_Shdr *shstrtab_hdr;
1879 if (abfd->output_has_begun)
1882 /* Do any elf backend specific processing first. */
1883 if (bed->elf_backend_begin_write_processing)
1884 (*bed->elf_backend_begin_write_processing) (abfd, link_info);
1886 if (! prep_headers (abfd))
1890 bfd_map_over_sections (abfd, elf_fake_sections, &failed);
1894 if (!assign_section_numbers (abfd))
1897 /* The backend linker builds symbol table information itself. */
1898 if (link_info == NULL && abfd->symcount > 0)
1900 if (! swap_out_syms (abfd, &strtab))
1904 shstrtab_hdr = &elf_tdata (abfd)->shstrtab_hdr;
1905 /* sh_name was set in prep_headers. */
1906 shstrtab_hdr->sh_type = SHT_STRTAB;
1907 shstrtab_hdr->sh_flags = 0;
1908 shstrtab_hdr->sh_addr = 0;
1909 shstrtab_hdr->sh_size = _bfd_stringtab_size (elf_shstrtab (abfd));
1910 shstrtab_hdr->sh_entsize = 0;
1911 shstrtab_hdr->sh_link = 0;
1912 shstrtab_hdr->sh_info = 0;
1913 /* sh_offset is set in assign_file_positions_except_relocs. */
1914 shstrtab_hdr->sh_addralign = 1;
1916 if (!assign_file_positions_except_relocs (abfd))
1919 if (link_info == NULL && abfd->symcount > 0)
1922 Elf_Internal_Shdr *hdr;
1924 off = elf_tdata (abfd)->next_file_pos;
1926 hdr = &elf_tdata (abfd)->symtab_hdr;
1927 off = _bfd_elf_assign_file_position_for_section (hdr, off, true);
1929 hdr = &elf_tdata (abfd)->strtab_hdr;
1930 off = _bfd_elf_assign_file_position_for_section (hdr, off, true);
1932 elf_tdata (abfd)->next_file_pos = off;
1934 /* Now that we know where the .strtab section goes, write it
1936 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
1937 || ! _bfd_stringtab_emit (abfd, strtab))
1939 _bfd_stringtab_free (strtab);
1942 abfd->output_has_begun = true;
1947 /* Create a mapping from a set of sections to a program segment. */
1949 static INLINE struct elf_segment_map *
1950 make_mapping (abfd, sections, from, to, phdr)
1952 asection **sections;
1957 struct elf_segment_map *m;
1961 m = ((struct elf_segment_map *)
1963 (sizeof (struct elf_segment_map)
1964 + (to - from - 1) * sizeof (asection *))));
1968 m->p_type = PT_LOAD;
1969 for (i = from, hdrpp = sections + from; i < to; i++, hdrpp++)
1970 m->sections[i - from] = *hdrpp;
1971 m->count = to - from;
1973 if (from == 0 && phdr)
1975 /* Include the headers in the first PT_LOAD segment. */
1976 m->includes_filehdr = 1;
1977 m->includes_phdrs = 1;
1983 /* Set up a mapping from BFD sections to program segments. */
1986 map_sections_to_segments (abfd)
1989 asection **sections = NULL;
1993 struct elf_segment_map *mfirst;
1994 struct elf_segment_map **pm;
1995 struct elf_segment_map *m;
1997 unsigned int phdr_index;
1998 bfd_vma maxpagesize;
2000 boolean phdr_in_section = true;
2004 if (elf_tdata (abfd)->segment_map != NULL)
2007 if (bfd_count_sections (abfd) == 0)
2010 /* Select the allocated sections, and sort them. */
2012 sections = (asection **) bfd_malloc (bfd_count_sections (abfd)
2013 * sizeof (asection *));
2014 if (sections == NULL)
2018 for (s = abfd->sections; s != NULL; s = s->next)
2020 if ((s->flags & SEC_ALLOC) != 0)
2026 BFD_ASSERT (i <= bfd_count_sections (abfd));
2029 qsort (sections, (size_t) count, sizeof (asection *), elf_sort_sections);
2031 /* Build the mapping. */
2036 /* If we have a .interp section, then create a PT_PHDR segment for
2037 the program headers and a PT_INTERP segment for the .interp
2039 s = bfd_get_section_by_name (abfd, ".interp");
2040 if (s != NULL && (s->flags & SEC_LOAD) != 0)
2042 m = ((struct elf_segment_map *)
2043 bfd_zalloc (abfd, sizeof (struct elf_segment_map)));
2047 m->p_type = PT_PHDR;
2048 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
2049 m->p_flags = PF_R | PF_X;
2050 m->p_flags_valid = 1;
2051 m->includes_phdrs = 1;
2056 m = ((struct elf_segment_map *)
2057 bfd_zalloc (abfd, sizeof (struct elf_segment_map)));
2061 m->p_type = PT_INTERP;
2069 /* Look through the sections. We put sections in the same program
2070 segment when the start of the second section can be placed within
2071 a few bytes of the end of the first section. */
2074 maxpagesize = get_elf_backend_data (abfd)->maxpagesize;
2076 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
2078 && (dynsec->flags & SEC_LOAD) == 0)
2081 /* Deal with -Ttext or something similar such that the first section
2082 is not adjacent to the program headers. This is an
2083 approximation, since at this point we don't know exactly how many
2084 program headers we will need. */
2087 bfd_size_type phdr_size;
2089 phdr_size = elf_tdata (abfd)->program_header_size;
2091 phdr_size = get_elf_backend_data (abfd)->s->sizeof_phdr;
2092 if ((abfd->flags & D_PAGED) == 0
2093 || sections[0]->lma % maxpagesize < phdr_size % maxpagesize)
2094 phdr_in_section = false;
2097 for (i = 0, hdrpp = sections; i < count; i++, hdrpp++)
2100 boolean new_segment;
2104 /* See if this section and the last one will fit in the same
2107 if (last_hdr == NULL)
2109 /* If we don't have a segment yet, then we don't need a new
2110 one (we build the last one after this loop). */
2111 new_segment = false;
2113 else if (last_hdr->lma - last_hdr->vma != hdr->lma - hdr->vma)
2115 /* If this section has a different relation between the
2116 virtual address and the load address, then we need a new
2120 else if (BFD_ALIGN (last_hdr->lma + last_hdr->_raw_size, maxpagesize)
2121 < BFD_ALIGN (hdr->lma, maxpagesize))
2123 /* If putting this section in this segment would force us to
2124 skip a page in the segment, then we need a new segment. */
2127 else if ((last_hdr->flags & SEC_LOAD) == 0
2128 && (hdr->flags & SEC_LOAD) != 0)
2130 /* We don't want to put a loadable section after a
2131 nonloadable section in the same segment. */
2134 else if ((abfd->flags & D_PAGED) == 0)
2136 /* If the file is not demand paged, which means that we
2137 don't require the sections to be correctly aligned in the
2138 file, then there is no other reason for a new segment. */
2139 new_segment = false;
2142 && (hdr->flags & SEC_READONLY) == 0
2143 && (BFD_ALIGN (last_hdr->lma + last_hdr->_raw_size, maxpagesize)
2146 /* We don't want to put a writable section in a read only
2147 segment, unless they are on the same page in memory
2148 anyhow. We already know that the last section does not
2149 bring us past the current section on the page, so the
2150 only case in which the new section is not on the same
2151 page as the previous section is when the previous section
2152 ends precisely on a page boundary. */
2157 /* Otherwise, we can use the same segment. */
2158 new_segment = false;
2163 if ((hdr->flags & SEC_READONLY) == 0)
2169 /* We need a new program segment. We must create a new program
2170 header holding all the sections from phdr_index until hdr. */
2172 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_section);
2179 if ((hdr->flags & SEC_READONLY) == 0)
2186 phdr_in_section = false;
2189 /* Create a final PT_LOAD program segment. */
2190 if (last_hdr != NULL)
2192 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_section);
2200 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
2203 m = ((struct elf_segment_map *)
2204 bfd_zalloc (abfd, sizeof (struct elf_segment_map)));
2208 m->p_type = PT_DYNAMIC;
2210 m->sections[0] = dynsec;
2216 /* For each loadable .note section, add a PT_NOTE segment. We don't
2217 use bfd_get_section_by_name, because if we link together
2218 nonloadable .note sections and loadable .note sections, we will
2219 generate two .note sections in the output file. FIXME: Using
2220 names for section types is bogus anyhow. */
2221 for (s = abfd->sections; s != NULL; s = s->next)
2223 if ((s->flags & SEC_LOAD) != 0
2224 && strncmp (s->name, ".note", 5) == 0)
2226 m = ((struct elf_segment_map *)
2227 bfd_zalloc (abfd, sizeof (struct elf_segment_map)));
2231 m->p_type = PT_NOTE;
2243 elf_tdata (abfd)->segment_map = mfirst;
2247 if (sections != NULL)
2252 /* Sort sections by VMA. */
2255 elf_sort_sections (arg1, arg2)
2259 const asection *sec1 = *(const asection **) arg1;
2260 const asection *sec2 = *(const asection **) arg2;
2262 if (sec1->vma < sec2->vma)
2264 else if (sec1->vma > sec2->vma)
2267 /* Sort by LMA. Normally the LMA and the VMA will be the same, and
2268 this will do nothing. */
2269 if (sec1->lma < sec2->lma)
2271 else if (sec1->lma > sec2->lma)
2274 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
2276 #define TOEND(x) (((x)->flags & SEC_LOAD) == 0)
2280 return sec1->target_index - sec2->target_index;
2289 /* Sort by size, to put zero sized sections before others at the
2292 if (sec1->_raw_size < sec2->_raw_size)
2294 if (sec1->_raw_size > sec2->_raw_size)
2297 return sec1->target_index - sec2->target_index;
2300 /* Assign file positions to the sections based on the mapping from
2301 sections to segments. This function also sets up some fields in
2302 the file header, and writes out the program headers. */
2305 assign_file_positions_for_segments (abfd)
2308 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2310 struct elf_segment_map *m;
2312 Elf_Internal_Phdr *phdrs;
2314 bfd_vma filehdr_vaddr, filehdr_paddr;
2315 bfd_vma phdrs_vaddr, phdrs_paddr;
2316 Elf_Internal_Phdr *p;
2318 if (elf_tdata (abfd)->segment_map == NULL)
2320 if (! map_sections_to_segments (abfd))
2324 if (bed->elf_backend_modify_segment_map)
2326 if (! (*bed->elf_backend_modify_segment_map) (abfd))
2331 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
2334 elf_elfheader (abfd)->e_phoff = bed->s->sizeof_ehdr;
2335 elf_elfheader (abfd)->e_phentsize = bed->s->sizeof_phdr;
2336 elf_elfheader (abfd)->e_phnum = count;
2341 /* If we already counted the number of program segments, make sure
2342 that we allocated enough space. This happens when SIZEOF_HEADERS
2343 is used in a linker script. */
2344 alloc = elf_tdata (abfd)->program_header_size / bed->s->sizeof_phdr;
2345 if (alloc != 0 && count > alloc)
2347 ((*_bfd_error_handler)
2348 ("%s: Not enough room for program headers (allocated %u, need %u)",
2349 bfd_get_filename (abfd), alloc, count));
2350 bfd_set_error (bfd_error_bad_value);
2357 phdrs = ((Elf_Internal_Phdr *)
2358 bfd_alloc (abfd, alloc * sizeof (Elf_Internal_Phdr)));
2362 off = bed->s->sizeof_ehdr;
2363 off += alloc * bed->s->sizeof_phdr;
2369 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
2376 /* If elf_segment_map is not from map_sections_to_segments, the
2377 sections may not be correctly ordered. */
2379 qsort (m->sections, (size_t) m->count, sizeof (asection *),
2382 p->p_type = m->p_type;
2384 if (m->p_flags_valid)
2385 p->p_flags = m->p_flags;
2389 if (p->p_type == PT_LOAD
2391 && (m->sections[0]->flags & SEC_ALLOC) != 0)
2393 if ((abfd->flags & D_PAGED) != 0)
2394 off += (m->sections[0]->vma - off) % bed->maxpagesize;
2396 off += ((m->sections[0]->vma - off)
2397 % (1 << bfd_get_section_alignment (abfd, m->sections[0])));
2403 p->p_vaddr = m->sections[0]->vma;
2405 if (m->p_paddr_valid)
2406 p->p_paddr = m->p_paddr;
2407 else if (m->count == 0)
2410 p->p_paddr = m->sections[0]->lma;
2412 if (p->p_type == PT_LOAD
2413 && (abfd->flags & D_PAGED) != 0)
2414 p->p_align = bed->maxpagesize;
2415 else if (m->count == 0)
2416 p->p_align = bed->s->file_align;
2424 if (m->includes_filehdr)
2426 if (! m->p_flags_valid)
2429 p->p_filesz = bed->s->sizeof_ehdr;
2430 p->p_memsz = bed->s->sizeof_ehdr;
2433 BFD_ASSERT (p->p_type == PT_LOAD);
2435 if (! m->p_paddr_valid)
2438 if (p->p_type == PT_LOAD)
2440 filehdr_vaddr = p->p_vaddr;
2441 filehdr_paddr = p->p_paddr;
2445 if (m->includes_phdrs)
2447 if (! m->p_flags_valid)
2449 if (m->includes_filehdr)
2451 if (p->p_type == PT_LOAD)
2453 phdrs_vaddr = p->p_vaddr + bed->s->sizeof_ehdr;
2454 phdrs_paddr = p->p_paddr + bed->s->sizeof_ehdr;
2459 p->p_offset = bed->s->sizeof_ehdr;
2462 BFD_ASSERT (p->p_type == PT_LOAD);
2463 p->p_vaddr -= off - p->p_offset;
2464 if (! m->p_paddr_valid)
2465 p->p_paddr -= off - p->p_offset;
2467 if (p->p_type == PT_LOAD)
2469 phdrs_vaddr = p->p_vaddr;
2470 phdrs_paddr = p->p_paddr;
2473 p->p_filesz += alloc * bed->s->sizeof_phdr;
2474 p->p_memsz += alloc * bed->s->sizeof_phdr;
2477 if (p->p_type == PT_LOAD)
2479 if (! m->includes_filehdr && ! m->includes_phdrs)
2485 adjust = off - (p->p_offset + p->p_filesz);
2486 p->p_filesz += adjust;
2487 p->p_memsz += adjust;
2492 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
2496 bfd_size_type align;
2500 align = 1 << bfd_get_section_alignment (abfd, sec);
2502 if (p->p_type == PT_LOAD)
2506 if ((flags & SEC_LOAD) != 0)
2507 adjust = sec->lma - (p->p_paddr + p->p_memsz);
2508 else if ((flags & SEC_ALLOC) != 0)
2510 /* The section VMA must equal the file position
2511 modulo the page size. FIXME: I'm not sure if
2512 this adjustment is really necessary. We used to
2513 not have the SEC_LOAD case just above, and then
2514 this was necessary, but now I'm not sure. */
2515 if ((abfd->flags & D_PAGED) != 0)
2516 adjust = (sec->vma - voff) % bed->maxpagesize;
2518 adjust = (sec->vma - voff) % align;
2525 p->p_memsz += adjust;
2528 if ((flags & SEC_LOAD) != 0)
2529 p->p_filesz += adjust;
2534 /* We check SEC_HAS_CONTENTS here because if NOLOAD is
2535 used in a linker script we may have a section with
2536 SEC_LOAD clear but which is supposed to have
2538 if ((flags & SEC_LOAD) != 0
2539 || (flags & SEC_HAS_CONTENTS) != 0)
2540 off += sec->_raw_size;
2541 if ((flags & SEC_ALLOC) != 0)
2542 voff += sec->_raw_size;
2545 p->p_memsz += sec->_raw_size;
2547 if ((flags & SEC_LOAD) != 0)
2548 p->p_filesz += sec->_raw_size;
2550 if (align > p->p_align)
2553 if (! m->p_flags_valid)
2556 if ((flags & SEC_CODE) != 0)
2558 if ((flags & SEC_READONLY) == 0)
2564 /* Now that we have set the section file positions, we can set up
2565 the file positions for the non PT_LOAD segments. */
2566 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
2570 if (p->p_type != PT_LOAD && m->count > 0)
2572 BFD_ASSERT (! m->includes_filehdr && ! m->includes_phdrs);
2573 p->p_offset = m->sections[0]->filepos;
2577 if (m->includes_filehdr)
2579 p->p_vaddr = filehdr_vaddr;
2580 if (! m->p_paddr_valid)
2581 p->p_paddr = filehdr_paddr;
2583 else if (m->includes_phdrs)
2585 p->p_vaddr = phdrs_vaddr;
2586 if (! m->p_paddr_valid)
2587 p->p_paddr = phdrs_paddr;
2592 /* Clear out any program headers we allocated but did not use. */
2593 for (; count < alloc; count++, p++)
2595 memset (p, 0, sizeof *p);
2596 p->p_type = PT_NULL;
2599 elf_tdata (abfd)->phdr = phdrs;
2601 elf_tdata (abfd)->next_file_pos = off;
2603 /* Write out the program headers. */
2604 if (bfd_seek (abfd, bed->s->sizeof_ehdr, SEEK_SET) != 0
2605 || bed->s->write_out_phdrs (abfd, phdrs, alloc) != 0)
2611 /* Get the size of the program header.
2613 If this is called by the linker before any of the section VMA's are set, it
2614 can't calculate the correct value for a strange memory layout. This only
2615 happens when SIZEOF_HEADERS is used in a linker script. In this case,
2616 SORTED_HDRS is NULL and we assume the normal scenario of one text and one
2617 data segment (exclusive of .interp and .dynamic).
2619 ??? User written scripts must either not use SIZEOF_HEADERS, or assume there
2620 will be two segments. */
2622 static bfd_size_type
2623 get_program_header_size (abfd)
2628 struct elf_backend_data *bed = get_elf_backend_data (abfd);
2630 /* We can't return a different result each time we're called. */
2631 if (elf_tdata (abfd)->program_header_size != 0)
2632 return elf_tdata (abfd)->program_header_size;
2634 if (elf_tdata (abfd)->segment_map != NULL)
2636 struct elf_segment_map *m;
2639 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
2641 elf_tdata (abfd)->program_header_size = segs * bed->s->sizeof_phdr;
2642 return elf_tdata (abfd)->program_header_size;
2645 /* Assume we will need exactly two PT_LOAD segments: one for text
2646 and one for data. */
2649 s = bfd_get_section_by_name (abfd, ".interp");
2650 if (s != NULL && (s->flags & SEC_LOAD) != 0)
2652 /* If we have a loadable interpreter section, we need a
2653 PT_INTERP segment. In this case, assume we also need a
2654 PT_PHDR segment, although that may not be true for all
2659 if (bfd_get_section_by_name (abfd, ".dynamic") != NULL)
2661 /* We need a PT_DYNAMIC segment. */
2665 for (s = abfd->sections; s != NULL; s = s->next)
2667 if ((s->flags & SEC_LOAD) != 0
2668 && strncmp (s->name, ".note", 5) == 0)
2670 /* We need a PT_NOTE segment. */
2675 /* Let the backend count up any program headers it might need. */
2676 if (bed->elf_backend_additional_program_headers)
2680 a = (*bed->elf_backend_additional_program_headers) (abfd);
2686 elf_tdata (abfd)->program_header_size = segs * bed->s->sizeof_phdr;
2687 return elf_tdata (abfd)->program_header_size;
2690 /* Work out the file positions of all the sections. This is called by
2691 _bfd_elf_compute_section_file_positions. All the section sizes and
2692 VMAs must be known before this is called.
2694 We do not consider reloc sections at this point, unless they form
2695 part of the loadable image. Reloc sections are assigned file
2696 positions in assign_file_positions_for_relocs, which is called by
2697 write_object_contents and final_link.
2699 We also don't set the positions of the .symtab and .strtab here. */
2702 assign_file_positions_except_relocs (abfd)
2705 struct elf_obj_tdata * const tdata = elf_tdata (abfd);
2706 Elf_Internal_Ehdr * const i_ehdrp = elf_elfheader (abfd);
2707 Elf_Internal_Shdr ** const i_shdrpp = elf_elfsections (abfd);
2709 struct elf_backend_data *bed = get_elf_backend_data (abfd);
2711 if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0)
2713 Elf_Internal_Shdr **hdrpp;
2716 /* Start after the ELF header. */
2717 off = i_ehdrp->e_ehsize;
2719 /* We are not creating an executable, which means that we are
2720 not creating a program header, and that the actual order of
2721 the sections in the file is unimportant. */
2722 for (i = 1, hdrpp = i_shdrpp + 1; i < i_ehdrp->e_shnum; i++, hdrpp++)
2724 Elf_Internal_Shdr *hdr;
2727 if (hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
2729 hdr->sh_offset = -1;
2732 if (i == tdata->symtab_section
2733 || i == tdata->strtab_section)
2735 hdr->sh_offset = -1;
2739 off = _bfd_elf_assign_file_position_for_section (hdr, off, true);
2745 Elf_Internal_Shdr **hdrpp;
2747 /* Assign file positions for the loaded sections based on the
2748 assignment of sections to segments. */
2749 if (! assign_file_positions_for_segments (abfd))
2752 /* Assign file positions for the other sections. */
2754 off = elf_tdata (abfd)->next_file_pos;
2755 for (i = 1, hdrpp = i_shdrpp + 1; i < i_ehdrp->e_shnum; i++, hdrpp++)
2757 Elf_Internal_Shdr *hdr;
2760 if (hdr->bfd_section != NULL
2761 && hdr->bfd_section->filepos != 0)
2762 hdr->sh_offset = hdr->bfd_section->filepos;
2763 else if ((hdr->sh_flags & SHF_ALLOC) != 0)
2765 ((*_bfd_error_handler)
2766 ("%s: warning: allocated section `%s' not in segment",
2767 bfd_get_filename (abfd),
2768 (hdr->bfd_section == NULL
2770 : hdr->bfd_section->name)));
2771 if ((abfd->flags & D_PAGED) != 0)
2772 off += (hdr->sh_addr - off) % bed->maxpagesize;
2774 off += (hdr->sh_addr - off) % hdr->sh_addralign;
2775 off = _bfd_elf_assign_file_position_for_section (hdr, off,
2778 else if (hdr->sh_type == SHT_REL
2779 || hdr->sh_type == SHT_RELA
2780 || hdr == i_shdrpp[tdata->symtab_section]
2781 || hdr == i_shdrpp[tdata->strtab_section])
2782 hdr->sh_offset = -1;
2784 off = _bfd_elf_assign_file_position_for_section (hdr, off, true);
2788 /* Place the section headers. */
2789 off = align_file_position (off, bed->s->file_align);
2790 i_ehdrp->e_shoff = off;
2791 off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize;
2793 elf_tdata (abfd)->next_file_pos = off;
2802 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
2803 Elf_Internal_Phdr *i_phdrp = 0; /* Program header table, internal form */
2804 Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */
2806 struct bfd_strtab_hash *shstrtab;
2807 struct elf_backend_data *bed = get_elf_backend_data (abfd);
2809 i_ehdrp = elf_elfheader (abfd);
2810 i_shdrp = elf_elfsections (abfd);
2812 shstrtab = _bfd_elf_stringtab_init ();
2813 if (shstrtab == NULL)
2816 elf_shstrtab (abfd) = shstrtab;
2818 i_ehdrp->e_ident[EI_MAG0] = ELFMAG0;
2819 i_ehdrp->e_ident[EI_MAG1] = ELFMAG1;
2820 i_ehdrp->e_ident[EI_MAG2] = ELFMAG2;
2821 i_ehdrp->e_ident[EI_MAG3] = ELFMAG3;
2823 i_ehdrp->e_ident[EI_CLASS] = bed->s->elfclass;
2824 i_ehdrp->e_ident[EI_DATA] =
2825 bfd_big_endian (abfd) ? ELFDATA2MSB : ELFDATA2LSB;
2826 i_ehdrp->e_ident[EI_VERSION] = bed->s->ev_current;
2828 for (count = EI_PAD; count < EI_NIDENT; count++)
2829 i_ehdrp->e_ident[count] = 0;
2831 if ((abfd->flags & DYNAMIC) != 0)
2832 i_ehdrp->e_type = ET_DYN;
2833 else if ((abfd->flags & EXEC_P) != 0)
2834 i_ehdrp->e_type = ET_EXEC;
2836 i_ehdrp->e_type = ET_REL;
2838 switch (bfd_get_arch (abfd))
2840 case bfd_arch_unknown:
2841 i_ehdrp->e_machine = EM_NONE;
2843 case bfd_arch_sparc:
2844 if (bed->s->arch_size == 64)
2845 i_ehdrp->e_machine = EM_SPARC64;
2847 i_ehdrp->e_machine = EM_SPARC;
2850 i_ehdrp->e_machine = EM_386;
2853 i_ehdrp->e_machine = EM_68K;
2856 i_ehdrp->e_machine = EM_88K;
2859 i_ehdrp->e_machine = EM_860;
2861 case bfd_arch_mips: /* MIPS Rxxxx */
2862 i_ehdrp->e_machine = EM_MIPS; /* only MIPS R3000 */
2865 i_ehdrp->e_machine = EM_PARISC;
2867 case bfd_arch_powerpc:
2868 i_ehdrp->e_machine = EM_PPC;
2870 case bfd_arch_alpha:
2871 i_ehdrp->e_machine = EM_ALPHA;
2874 i_ehdrp->e_machine = EM_SH;
2877 i_ehdrp->e_machine = EM_CYGNUS_D10V;
2879 /* start-sanitize-d30v */
2881 i_ehdrp->e_machine = EM_CYGNUS_D30V;
2883 /* end-sanitize-d30v */
2885 switch (bfd_get_mach (abfd))
2888 case 0: i_ehdrp->e_machine = EM_CYGNUS_V850; break;
2892 i_ehdrp->e_machine = EM_CYGNUS_ARC;
2895 i_ehdrp->e_machine = EM_CYGNUS_M32R;
2897 case bfd_arch_mn10200:
2898 i_ehdrp->e_machine = EM_CYGNUS_MN10200;
2900 case bfd_arch_mn10300:
2901 i_ehdrp->e_machine = EM_CYGNUS_MN10300;
2903 /* also note that EM_M32, AT&T WE32100 is unknown to bfd */
2905 i_ehdrp->e_machine = EM_NONE;
2907 i_ehdrp->e_version = bed->s->ev_current;
2908 i_ehdrp->e_ehsize = bed->s->sizeof_ehdr;
2910 /* no program header, for now. */
2911 i_ehdrp->e_phoff = 0;
2912 i_ehdrp->e_phentsize = 0;
2913 i_ehdrp->e_phnum = 0;
2915 /* each bfd section is section header entry */
2916 i_ehdrp->e_entry = bfd_get_start_address (abfd);
2917 i_ehdrp->e_shentsize = bed->s->sizeof_shdr;
2919 /* if we're building an executable, we'll need a program header table */
2920 if (abfd->flags & EXEC_P)
2922 /* it all happens later */
2924 i_ehdrp->e_phentsize = sizeof (Elf_External_Phdr);
2926 /* elf_build_phdrs() returns a (NULL-terminated) array of
2927 Elf_Internal_Phdrs */
2928 i_phdrp = elf_build_phdrs (abfd, i_ehdrp, i_shdrp, &i_ehdrp->e_phnum);
2929 i_ehdrp->e_phoff = outbase;
2930 outbase += i_ehdrp->e_phentsize * i_ehdrp->e_phnum;
2935 i_ehdrp->e_phentsize = 0;
2937 i_ehdrp->e_phoff = 0;
2940 elf_tdata (abfd)->symtab_hdr.sh_name =
2941 (unsigned int) _bfd_stringtab_add (shstrtab, ".symtab", true, false);
2942 elf_tdata (abfd)->strtab_hdr.sh_name =
2943 (unsigned int) _bfd_stringtab_add (shstrtab, ".strtab", true, false);
2944 elf_tdata (abfd)->shstrtab_hdr.sh_name =
2945 (unsigned int) _bfd_stringtab_add (shstrtab, ".shstrtab", true, false);
2946 if (elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
2947 || elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
2948 || elf_tdata (abfd)->shstrtab_hdr.sh_name == (unsigned int) -1)
2954 /* Assign file positions for all the reloc sections which are not part
2955 of the loadable file image. */
2958 _bfd_elf_assign_file_positions_for_relocs (abfd)
2963 Elf_Internal_Shdr **shdrpp;
2965 off = elf_tdata (abfd)->next_file_pos;
2967 for (i = 1, shdrpp = elf_elfsections (abfd) + 1;
2968 i < elf_elfheader (abfd)->e_shnum;
2971 Elf_Internal_Shdr *shdrp;
2974 if ((shdrp->sh_type == SHT_REL || shdrp->sh_type == SHT_RELA)
2975 && shdrp->sh_offset == -1)
2976 off = _bfd_elf_assign_file_position_for_section (shdrp, off, true);
2979 elf_tdata (abfd)->next_file_pos = off;
2983 _bfd_elf_write_object_contents (abfd)
2986 struct elf_backend_data *bed = get_elf_backend_data (abfd);
2987 Elf_Internal_Ehdr *i_ehdrp;
2988 Elf_Internal_Shdr **i_shdrp;
2992 if (! abfd->output_has_begun
2993 && ! _bfd_elf_compute_section_file_positions (abfd,
2994 (struct bfd_link_info *) NULL))
2997 i_shdrp = elf_elfsections (abfd);
2998 i_ehdrp = elf_elfheader (abfd);
3001 bfd_map_over_sections (abfd, bed->s->write_relocs, &failed);
3004 _bfd_elf_assign_file_positions_for_relocs (abfd);
3006 /* After writing the headers, we need to write the sections too... */
3007 for (count = 1; count < i_ehdrp->e_shnum; count++)
3009 if (bed->elf_backend_section_processing)
3010 (*bed->elf_backend_section_processing) (abfd, i_shdrp[count]);
3011 if (i_shdrp[count]->contents)
3013 if (bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET) != 0
3014 || (bfd_write (i_shdrp[count]->contents, i_shdrp[count]->sh_size,
3016 != i_shdrp[count]->sh_size))
3021 /* Write out the section header names. */
3022 if (bfd_seek (abfd, elf_tdata (abfd)->shstrtab_hdr.sh_offset, SEEK_SET) != 0
3023 || ! _bfd_stringtab_emit (abfd, elf_shstrtab (abfd)))
3026 if (bed->elf_backend_final_write_processing)
3027 (*bed->elf_backend_final_write_processing) (abfd,
3028 elf_tdata (abfd)->linker);
3030 return bed->s->write_shdrs_and_ehdr (abfd);
3033 /* given a section, search the header to find them... */
3035 _bfd_elf_section_from_bfd_section (abfd, asect)
3039 struct elf_backend_data *bed = get_elf_backend_data (abfd);
3040 Elf_Internal_Shdr **i_shdrp = elf_elfsections (abfd);
3042 Elf_Internal_Shdr *hdr;
3043 int maxindex = elf_elfheader (abfd)->e_shnum;
3045 for (index = 0; index < maxindex; index++)
3047 hdr = i_shdrp[index];
3048 if (hdr->bfd_section == asect)
3052 if (bed->elf_backend_section_from_bfd_section)
3054 for (index = 0; index < maxindex; index++)
3058 hdr = i_shdrp[index];
3060 if ((*bed->elf_backend_section_from_bfd_section)
3061 (abfd, hdr, asect, &retval))
3066 if (bfd_is_abs_section (asect))
3068 if (bfd_is_com_section (asect))
3070 if (bfd_is_und_section (asect))
3076 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
3080 _bfd_elf_symbol_from_bfd_symbol (abfd, asym_ptr_ptr)
3082 asymbol **asym_ptr_ptr;
3084 asymbol *asym_ptr = *asym_ptr_ptr;
3086 flagword flags = asym_ptr->flags;
3088 /* When gas creates relocations against local labels, it creates its
3089 own symbol for the section, but does put the symbol into the
3090 symbol chain, so udata is 0. When the linker is generating
3091 relocatable output, this section symbol may be for one of the
3092 input sections rather than the output section. */
3093 if (asym_ptr->udata.i == 0
3094 && (flags & BSF_SECTION_SYM)
3095 && asym_ptr->section)
3099 if (asym_ptr->section->output_section != NULL)
3100 indx = asym_ptr->section->output_section->index;
3102 indx = asym_ptr->section->index;
3103 if (elf_section_syms (abfd)[indx])
3104 asym_ptr->udata.i = elf_section_syms (abfd)[indx]->udata.i;
3107 idx = asym_ptr->udata.i;
3111 /* This case can occur when using --strip-symbol on a symbol
3112 which is used in a relocation entry. */
3113 (*_bfd_error_handler)
3114 ("%s: symbol `%s' required but not present",
3115 bfd_get_filename (abfd), bfd_asymbol_name (asym_ptr));
3116 bfd_set_error (bfd_error_no_symbols);
3123 "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n",
3124 (long) asym_ptr, asym_ptr->name, idx, flags,
3125 elf_symbol_flags (flags));
3133 /* Copy private BFD data. This copies any program header information. */
3136 copy_private_bfd_data (ibfd, obfd)
3140 Elf_Internal_Ehdr *iehdr;
3141 struct elf_segment_map *mfirst;
3142 struct elf_segment_map **pm;
3143 Elf_Internal_Phdr *p;
3146 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
3147 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
3150 if (elf_tdata (ibfd)->phdr == NULL)
3153 iehdr = elf_elfheader (ibfd);
3158 c = elf_elfheader (ibfd)->e_phnum;
3159 for (i = 0, p = elf_tdata (ibfd)->phdr; i < c; i++, p++)
3163 struct elf_segment_map *m;
3168 /* The complicated case when p_vaddr is 0 is to handle the
3169 Solaris linker, which generates a PT_INTERP section with
3170 p_vaddr and p_memsz set to 0. */
3171 for (s = ibfd->sections; s != NULL; s = s->next)
3172 if (((s->vma >= p->p_vaddr
3173 && (s->vma + s->_raw_size <= p->p_vaddr + p->p_memsz
3174 || s->vma + s->_raw_size <= p->p_vaddr + p->p_filesz))
3177 && (s->flags & SEC_HAS_CONTENTS) != 0
3178 && (bfd_vma) s->filepos >= p->p_offset
3179 && ((bfd_vma) s->filepos + s->_raw_size
3180 <= p->p_offset + p->p_filesz)))
3181 && (s->flags & SEC_ALLOC) != 0
3182 && s->output_section != NULL)
3185 m = ((struct elf_segment_map *)
3187 (sizeof (struct elf_segment_map)
3188 + ((size_t) csecs - 1) * sizeof (asection *))));
3193 m->p_type = p->p_type;
3194 m->p_flags = p->p_flags;
3195 m->p_flags_valid = 1;
3196 m->p_paddr = p->p_paddr;
3197 m->p_paddr_valid = 1;
3199 m->includes_filehdr = (p->p_offset == 0
3200 && p->p_filesz >= iehdr->e_ehsize);
3202 m->includes_phdrs = (p->p_offset <= (bfd_vma) iehdr->e_phoff
3203 && (p->p_offset + p->p_filesz
3204 >= ((bfd_vma) iehdr->e_phoff
3205 + iehdr->e_phnum * iehdr->e_phentsize)));
3208 for (s = ibfd->sections; s != NULL; s = s->next)
3210 if (((s->vma >= p->p_vaddr
3211 && (s->vma + s->_raw_size <= p->p_vaddr + p->p_memsz
3212 || s->vma + s->_raw_size <= p->p_vaddr + p->p_filesz))
3215 && (s->flags & SEC_HAS_CONTENTS) != 0
3216 && (bfd_vma) s->filepos >= p->p_offset
3217 && ((bfd_vma) s->filepos + s->_raw_size
3218 <= p->p_offset + p->p_filesz)))
3219 && (s->flags & SEC_ALLOC) != 0
3220 && s->output_section != NULL)
3222 m->sections[isec] = s->output_section;
3226 BFD_ASSERT (isec == csecs);
3233 elf_tdata (obfd)->segment_map = mfirst;
3238 /* Copy private section information. This copies over the entsize
3239 field, and sometimes the info field. */
3242 _bfd_elf_copy_private_section_data (ibfd, isec, obfd, osec)
3248 Elf_Internal_Shdr *ihdr, *ohdr;
3250 if (ibfd->xvec->flavour != bfd_target_elf_flavour
3251 || obfd->xvec->flavour != bfd_target_elf_flavour)
3254 /* Copy over private BFD data if it has not already been copied.
3255 This must be done here, rather than in the copy_private_bfd_data
3256 entry point, because the latter is called after the section
3257 contents have been set, which means that the program headers have
3258 already been worked out. */
3259 if (elf_tdata (obfd)->segment_map == NULL
3260 && elf_tdata (ibfd)->phdr != NULL)
3264 /* Only set up the segments when all the sections have been set
3266 for (s = ibfd->sections; s != NULL; s = s->next)
3267 if (s->output_section == NULL)
3271 if (! copy_private_bfd_data (ibfd, obfd))
3276 ihdr = &elf_section_data (isec)->this_hdr;
3277 ohdr = &elf_section_data (osec)->this_hdr;
3279 ohdr->sh_entsize = ihdr->sh_entsize;
3281 if (ihdr->sh_type == SHT_SYMTAB
3282 || ihdr->sh_type == SHT_DYNSYM
3283 || ihdr->sh_type == SHT_GNU_verneed
3284 || ihdr->sh_type == SHT_GNU_verdef)
3285 ohdr->sh_info = ihdr->sh_info;
3290 /* Copy private symbol information. If this symbol is in a section
3291 which we did not map into a BFD section, try to map the section
3292 index correctly. We use special macro definitions for the mapped
3293 section indices; these definitions are interpreted by the
3294 swap_out_syms function. */
3296 #define MAP_ONESYMTAB (SHN_LORESERVE - 1)
3297 #define MAP_DYNSYMTAB (SHN_LORESERVE - 2)
3298 #define MAP_STRTAB (SHN_LORESERVE - 3)
3299 #define MAP_SHSTRTAB (SHN_LORESERVE - 4)
3302 _bfd_elf_copy_private_symbol_data (ibfd, isymarg, obfd, osymarg)
3308 elf_symbol_type *isym, *osym;
3310 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
3311 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
3314 isym = elf_symbol_from (ibfd, isymarg);
3315 osym = elf_symbol_from (obfd, osymarg);
3319 && bfd_is_abs_section (isym->symbol.section))
3323 shndx = isym->internal_elf_sym.st_shndx;
3324 if (shndx == elf_onesymtab (ibfd))
3325 shndx = MAP_ONESYMTAB;
3326 else if (shndx == elf_dynsymtab (ibfd))
3327 shndx = MAP_DYNSYMTAB;
3328 else if (shndx == elf_tdata (ibfd)->strtab_section)
3330 else if (shndx == elf_tdata (ibfd)->shstrtab_section)
3331 shndx = MAP_SHSTRTAB;
3332 osym->internal_elf_sym.st_shndx = shndx;
3338 /* Swap out the symbols. */
3341 swap_out_syms (abfd, sttp)
3343 struct bfd_strtab_hash **sttp;
3345 struct elf_backend_data *bed = get_elf_backend_data (abfd);
3347 if (!elf_map_symbols (abfd))
3350 /* Dump out the symtabs. */
3352 int symcount = bfd_get_symcount (abfd);
3353 asymbol **syms = bfd_get_outsymbols (abfd);
3354 struct bfd_strtab_hash *stt;
3355 Elf_Internal_Shdr *symtab_hdr;
3356 Elf_Internal_Shdr *symstrtab_hdr;
3357 char *outbound_syms;
3360 stt = _bfd_elf_stringtab_init ();
3364 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3365 symtab_hdr->sh_type = SHT_SYMTAB;
3366 symtab_hdr->sh_entsize = bed->s->sizeof_sym;
3367 symtab_hdr->sh_size = symtab_hdr->sh_entsize * (symcount + 1);
3368 symtab_hdr->sh_info = elf_num_locals (abfd) + 1;
3369 symtab_hdr->sh_addralign = bed->s->file_align;
3371 symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr;
3372 symstrtab_hdr->sh_type = SHT_STRTAB;
3374 outbound_syms = bfd_alloc (abfd,
3375 (1 + symcount) * bed->s->sizeof_sym);
3376 if (outbound_syms == NULL)
3378 symtab_hdr->contents = (PTR) outbound_syms;
3380 /* now generate the data (for "contents") */
3382 /* Fill in zeroth symbol and swap it out. */
3383 Elf_Internal_Sym sym;
3389 sym.st_shndx = SHN_UNDEF;
3390 bed->s->swap_symbol_out (abfd, &sym, (PTR) outbound_syms);
3391 outbound_syms += bed->s->sizeof_sym;
3393 for (idx = 0; idx < symcount; idx++)
3395 Elf_Internal_Sym sym;
3396 bfd_vma value = syms[idx]->value;
3397 elf_symbol_type *type_ptr;
3398 flagword flags = syms[idx]->flags;
3401 if (flags & BSF_SECTION_SYM)
3402 /* Section symbols have no names. */
3406 sym.st_name = (unsigned long) _bfd_stringtab_add (stt,
3409 if (sym.st_name == (unsigned long) -1)
3413 type_ptr = elf_symbol_from (abfd, syms[idx]);
3415 if (bfd_is_com_section (syms[idx]->section))
3417 /* ELF common symbols put the alignment into the `value' field,
3418 and the size into the `size' field. This is backwards from
3419 how BFD handles it, so reverse it here. */
3420 sym.st_size = value;
3421 if (type_ptr == NULL
3422 || type_ptr->internal_elf_sym.st_value == 0)
3423 sym.st_value = value >= 16 ? 16 : (1 << bfd_log2 (value));
3425 sym.st_value = type_ptr->internal_elf_sym.st_value;
3426 sym.st_shndx = _bfd_elf_section_from_bfd_section (abfd,
3427 syms[idx]->section);
3431 asection *sec = syms[idx]->section;
3434 if (sec->output_section)
3436 value += sec->output_offset;
3437 sec = sec->output_section;
3440 sym.st_value = value;
3441 sym.st_size = type_ptr ? type_ptr->internal_elf_sym.st_size : 0;
3443 if (bfd_is_abs_section (sec)
3445 && type_ptr->internal_elf_sym.st_shndx != 0)
3447 /* This symbol is in a real ELF section which we did
3448 not create as a BFD section. Undo the mapping done
3449 by copy_private_symbol_data. */
3450 shndx = type_ptr->internal_elf_sym.st_shndx;
3454 shndx = elf_onesymtab (abfd);
3457 shndx = elf_dynsymtab (abfd);
3460 shndx = elf_tdata (abfd)->strtab_section;
3463 shndx = elf_tdata (abfd)->shstrtab_section;
3471 shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
3477 /* Writing this would be a hell of a lot easier if
3478 we had some decent documentation on bfd, and
3479 knew what to expect of the library, and what to
3480 demand of applications. For example, it
3481 appears that `objcopy' might not set the
3482 section of a symbol to be a section that is
3483 actually in the output file. */
3484 sec2 = bfd_get_section_by_name (abfd, sec->name);
3485 BFD_ASSERT (sec2 != 0);
3486 shndx = _bfd_elf_section_from_bfd_section (abfd, sec2);
3487 BFD_ASSERT (shndx != -1);
3491 sym.st_shndx = shndx;
3494 if ((flags & BSF_FUNCTION) != 0)
3496 else if ((flags & BSF_OBJECT) != 0)
3501 if (bfd_is_com_section (syms[idx]->section))
3502 sym.st_info = ELF_ST_INFO (STB_GLOBAL, type);
3503 else if (bfd_is_und_section (syms[idx]->section))
3504 sym.st_info = ELF_ST_INFO (((flags & BSF_WEAK)
3508 else if (flags & BSF_SECTION_SYM)
3509 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
3510 else if (flags & BSF_FILE)
3511 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE);
3514 int bind = STB_LOCAL;
3516 if (flags & BSF_LOCAL)
3518 else if (flags & BSF_WEAK)
3520 else if (flags & BSF_GLOBAL)
3523 sym.st_info = ELF_ST_INFO (bind, type);
3526 if (type_ptr != NULL)
3527 sym.st_other = type_ptr->internal_elf_sym.st_other;
3531 bed->s->swap_symbol_out (abfd, &sym, (PTR) outbound_syms);
3532 outbound_syms += bed->s->sizeof_sym;
3536 symstrtab_hdr->sh_size = _bfd_stringtab_size (stt);
3537 symstrtab_hdr->sh_type = SHT_STRTAB;
3539 symstrtab_hdr->sh_flags = 0;
3540 symstrtab_hdr->sh_addr = 0;
3541 symstrtab_hdr->sh_entsize = 0;
3542 symstrtab_hdr->sh_link = 0;
3543 symstrtab_hdr->sh_info = 0;
3544 symstrtab_hdr->sh_addralign = 1;
3550 /* Return the number of bytes required to hold the symtab vector.
3552 Note that we base it on the count plus 1, since we will null terminate
3553 the vector allocated based on this size. However, the ELF symbol table
3554 always has a dummy entry as symbol #0, so it ends up even. */
3557 _bfd_elf_get_symtab_upper_bound (abfd)
3562 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->symtab_hdr;
3564 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
3565 symtab_size = (symcount - 1 + 1) * (sizeof (asymbol *));
3571 _bfd_elf_get_dynamic_symtab_upper_bound (abfd)
3576 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->dynsymtab_hdr;
3578 if (elf_dynsymtab (abfd) == 0)
3580 bfd_set_error (bfd_error_invalid_operation);
3584 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
3585 symtab_size = (symcount - 1 + 1) * (sizeof (asymbol *));
3591 _bfd_elf_get_reloc_upper_bound (abfd, asect)
3595 return (asect->reloc_count + 1) * sizeof (arelent *);
3598 /* Canonicalize the relocs. */
3601 _bfd_elf_canonicalize_reloc (abfd, section, relptr, symbols)
3610 if (! get_elf_backend_data (abfd)->s->slurp_reloc_table (abfd,
3616 tblptr = section->relocation;
3617 for (i = 0; i < section->reloc_count; i++)
3618 *relptr++ = tblptr++;
3622 return section->reloc_count;
3626 _bfd_elf_get_symtab (abfd, alocation)
3628 asymbol **alocation;
3630 long symcount = get_elf_backend_data (abfd)->s->slurp_symbol_table (abfd, alocation, false);
3633 bfd_get_symcount (abfd) = symcount;
3638 _bfd_elf_canonicalize_dynamic_symtab (abfd, alocation)
3640 asymbol **alocation;
3642 return get_elf_backend_data (abfd)->s->slurp_symbol_table (abfd, alocation, true);
3645 /* Return the size required for the dynamic reloc entries. Any
3646 section that was actually installed in the BFD, and has type
3647 SHT_REL or SHT_RELA, and uses the dynamic symbol table, is
3648 considered to be a dynamic reloc section. */
3651 _bfd_elf_get_dynamic_reloc_upper_bound (abfd)
3657 if (elf_dynsymtab (abfd) == 0)
3659 bfd_set_error (bfd_error_invalid_operation);
3663 ret = sizeof (arelent *);
3664 for (s = abfd->sections; s != NULL; s = s->next)
3665 if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
3666 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
3667 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
3668 ret += ((s->_raw_size / elf_section_data (s)->this_hdr.sh_entsize)
3669 * sizeof (arelent *));
3674 /* Canonicalize the dynamic relocation entries. Note that we return
3675 the dynamic relocations as a single block, although they are
3676 actually associated with particular sections; the interface, which
3677 was designed for SunOS style shared libraries, expects that there
3678 is only one set of dynamic relocs. Any section that was actually
3679 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses
3680 the dynamic symbol table, is considered to be a dynamic reloc
3684 _bfd_elf_canonicalize_dynamic_reloc (abfd, storage, syms)
3689 boolean (*slurp_relocs) PARAMS ((bfd *, asection *, asymbol **, boolean));
3693 if (elf_dynsymtab (abfd) == 0)
3695 bfd_set_error (bfd_error_invalid_operation);
3699 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3701 for (s = abfd->sections; s != NULL; s = s->next)
3703 if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
3704 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
3705 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
3710 if (! (*slurp_relocs) (abfd, s, syms, true))
3712 count = s->_raw_size / elf_section_data (s)->this_hdr.sh_entsize;
3714 for (i = 0; i < count; i++)
3725 /* Read in the version information. */
3728 _bfd_elf_slurp_version_tables (abfd)
3731 bfd_byte *contents = NULL;
3733 if (elf_dynverdef (abfd) != 0)
3735 Elf_Internal_Shdr *hdr;
3736 Elf_External_Verdef *everdef;
3737 Elf_Internal_Verdef *iverdef;
3740 hdr = &elf_tdata (abfd)->dynverdef_hdr;
3742 elf_tdata (abfd)->verdef =
3743 ((Elf_Internal_Verdef *)
3744 bfd_zalloc (abfd, hdr->sh_info * sizeof (Elf_Internal_Verdef)));
3745 if (elf_tdata (abfd)->verdef == NULL)
3748 elf_tdata (abfd)->cverdefs = hdr->sh_info;
3750 contents = (bfd_byte *) bfd_malloc (hdr->sh_size);
3751 if (contents == NULL)
3753 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
3754 || bfd_read ((PTR) contents, 1, hdr->sh_size, abfd) != hdr->sh_size)
3757 everdef = (Elf_External_Verdef *) contents;
3758 iverdef = elf_tdata (abfd)->verdef;
3759 for (i = 0; i < hdr->sh_info; i++, iverdef++)
3761 Elf_External_Verdaux *everdaux;
3762 Elf_Internal_Verdaux *iverdaux;
3765 _bfd_elf_swap_verdef_in (abfd, everdef, iverdef);
3767 iverdef->vd_bfd = abfd;
3769 iverdef->vd_auxptr = ((Elf_Internal_Verdaux *)
3772 * sizeof (Elf_Internal_Verdaux))));
3773 if (iverdef->vd_auxptr == NULL)
3776 everdaux = ((Elf_External_Verdaux *)
3777 ((bfd_byte *) everdef + iverdef->vd_aux));
3778 iverdaux = iverdef->vd_auxptr;
3779 for (j = 0; j < iverdef->vd_cnt; j++, iverdaux++)
3781 _bfd_elf_swap_verdaux_in (abfd, everdaux, iverdaux);
3783 iverdaux->vda_nodename =
3784 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
3785 iverdaux->vda_name);
3786 if (iverdaux->vda_nodename == NULL)
3789 if (j + 1 < iverdef->vd_cnt)
3790 iverdaux->vda_nextptr = iverdaux + 1;
3792 iverdaux->vda_nextptr = NULL;
3794 everdaux = ((Elf_External_Verdaux *)
3795 ((bfd_byte *) everdaux + iverdaux->vda_next));
3798 iverdef->vd_nodename = iverdef->vd_auxptr->vda_nodename;
3800 if (i + 1 < hdr->sh_info)
3801 iverdef->vd_nextdef = iverdef + 1;
3803 iverdef->vd_nextdef = NULL;
3805 everdef = ((Elf_External_Verdef *)
3806 ((bfd_byte *) everdef + iverdef->vd_next));
3813 if (elf_dynverref (abfd) != 0)
3815 Elf_Internal_Shdr *hdr;
3816 Elf_External_Verneed *everneed;
3817 Elf_Internal_Verneed *iverneed;
3820 hdr = &elf_tdata (abfd)->dynverref_hdr;
3822 elf_tdata (abfd)->verref =
3823 ((Elf_Internal_Verneed *)
3824 bfd_zalloc (abfd, hdr->sh_info * sizeof (Elf_Internal_Verneed)));
3825 if (elf_tdata (abfd)->verref == NULL)
3828 elf_tdata (abfd)->cverrefs = hdr->sh_info;
3830 contents = (bfd_byte *) bfd_malloc (hdr->sh_size);
3831 if (contents == NULL)
3833 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
3834 || bfd_read ((PTR) contents, 1, hdr->sh_size, abfd) != hdr->sh_size)
3837 everneed = (Elf_External_Verneed *) contents;
3838 iverneed = elf_tdata (abfd)->verref;
3839 for (i = 0; i < hdr->sh_info; i++, iverneed++)
3841 Elf_External_Vernaux *evernaux;
3842 Elf_Internal_Vernaux *ivernaux;
3845 _bfd_elf_swap_verneed_in (abfd, everneed, iverneed);
3847 iverneed->vn_bfd = abfd;
3849 iverneed->vn_filename =
3850 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
3852 if (iverneed->vn_filename == NULL)
3855 iverneed->vn_auxptr =
3856 ((Elf_Internal_Vernaux *)
3858 iverneed->vn_cnt * sizeof (Elf_Internal_Vernaux)));
3860 evernaux = ((Elf_External_Vernaux *)
3861 ((bfd_byte *) everneed + iverneed->vn_aux));
3862 ivernaux = iverneed->vn_auxptr;
3863 for (j = 0; j < iverneed->vn_cnt; j++, ivernaux++)
3865 _bfd_elf_swap_vernaux_in (abfd, evernaux, ivernaux);
3867 ivernaux->vna_nodename =
3868 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
3869 ivernaux->vna_name);
3870 if (ivernaux->vna_nodename == NULL)
3873 if (j + 1 < iverneed->vn_cnt)
3874 ivernaux->vna_nextptr = ivernaux + 1;
3876 ivernaux->vna_nextptr = NULL;
3878 evernaux = ((Elf_External_Vernaux *)
3879 ((bfd_byte *) evernaux + ivernaux->vna_next));
3882 if (i + 1 < hdr->sh_info)
3883 iverneed->vn_nextref = iverneed + 1;
3885 iverneed->vn_nextref = NULL;
3887 everneed = ((Elf_External_Verneed *)
3888 ((bfd_byte *) everneed + iverneed->vn_next));
3898 if (contents == NULL)
3904 _bfd_elf_make_empty_symbol (abfd)
3907 elf_symbol_type *newsym;
3909 newsym = (elf_symbol_type *) bfd_zalloc (abfd, sizeof (elf_symbol_type));
3914 newsym->symbol.the_bfd = abfd;
3915 return &newsym->symbol;
3920 _bfd_elf_get_symbol_info (ignore_abfd, symbol, ret)
3925 bfd_symbol_info (symbol, ret);
3928 /* Return whether a symbol name implies a local symbol. Most targets
3929 use this function for the is_local_label_name entry point, but some
3933 _bfd_elf_is_local_label_name (abfd, name)
3937 /* Normal local symbols start with ``.L''. */
3938 if (name[0] == '.' && name[1] == 'L')
3941 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
3942 DWARF debugging symbols starting with ``..''. */
3943 if (name[0] == '.' && name[1] == '.')
3946 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
3947 emitting DWARF debugging output. I suspect this is actually a
3948 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
3949 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
3950 underscore to be emitted on some ELF targets). For ease of use,
3951 we treat such symbols as local. */
3952 if (name[0] == '_' && name[1] == '.' && name[2] == 'L' && name[3] == '_')
3959 _bfd_elf_get_lineno (ignore_abfd, symbol)
3968 _bfd_elf_set_arch_mach (abfd, arch, machine)
3970 enum bfd_architecture arch;
3971 unsigned long machine;
3973 /* If this isn't the right architecture for this backend, and this
3974 isn't the generic backend, fail. */
3975 if (arch != get_elf_backend_data (abfd)->arch
3976 && arch != bfd_arch_unknown
3977 && get_elf_backend_data (abfd)->arch != bfd_arch_unknown)
3980 return bfd_default_set_arch_mach (abfd, arch, machine);
3983 /* Find the nearest line to a particular section and offset, for error
3987 _bfd_elf_find_nearest_line (abfd,
3998 CONST char **filename_ptr;
3999 CONST char **functionname_ptr;
4000 unsigned int *line_ptr;
4003 const char *filename;
4008 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
4009 &found, filename_ptr,
4010 functionname_ptr, line_ptr,
4011 &elf_tdata (abfd)->line_info))
4016 if (symbols == NULL)
4023 for (p = symbols; *p != NULL; p++)
4027 q = (elf_symbol_type *) *p;
4029 if (bfd_get_section (&q->symbol) != section)
4032 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
4037 filename = bfd_asymbol_name (&q->symbol);
4040 if (q->symbol.section == section
4041 && q->symbol.value >= low_func
4042 && q->symbol.value <= offset)
4044 func = (asymbol *) q;
4045 low_func = q->symbol.value;
4054 *filename_ptr = filename;
4055 *functionname_ptr = bfd_asymbol_name (func);
4061 _bfd_elf_sizeof_headers (abfd, reloc)
4067 ret = get_elf_backend_data (abfd)->s->sizeof_ehdr;
4069 ret += get_program_header_size (abfd);
4074 _bfd_elf_set_section_contents (abfd, section, location, offset, count)
4079 bfd_size_type count;
4081 Elf_Internal_Shdr *hdr;
4083 if (! abfd->output_has_begun
4084 && ! _bfd_elf_compute_section_file_positions (abfd,
4085 (struct bfd_link_info *) NULL))
4088 hdr = &elf_section_data (section)->this_hdr;
4090 if (bfd_seek (abfd, hdr->sh_offset + offset, SEEK_SET) == -1)
4092 if (bfd_write (location, 1, count, abfd) != count)
4099 _bfd_elf_no_info_to_howto (abfd, cache_ptr, dst)
4102 Elf_Internal_Rela *dst;
4109 _bfd_elf_no_info_to_howto_rel (abfd, cache_ptr, dst)
4112 Elf_Internal_Rel *dst;
4118 /* Try to convert a non-ELF reloc into an ELF one. */
4121 _bfd_elf_validate_reloc (abfd, areloc)
4125 /* Check whether we really have an ELF howto. */
4127 if ((*areloc->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec)
4129 bfd_reloc_code_real_type code;
4130 reloc_howto_type *howto;
4132 /* Alien reloc: Try to determine its type to replace it with an
4133 equivalent ELF reloc. */
4135 if (areloc->howto->pc_relative)
4137 switch (areloc->howto->bitsize)
4140 code = BFD_RELOC_8_PCREL;
4143 code = BFD_RELOC_12_PCREL;
4146 code = BFD_RELOC_16_PCREL;
4149 code = BFD_RELOC_24_PCREL;
4152 code = BFD_RELOC_32_PCREL;
4155 code = BFD_RELOC_64_PCREL;
4161 howto = bfd_reloc_type_lookup (abfd, code);
4163 if (areloc->howto->pcrel_offset != howto->pcrel_offset)
4165 if (howto->pcrel_offset)
4166 areloc->addend += areloc->address;
4168 areloc->addend -= areloc->address; /* addend is unsigned!! */
4173 switch (areloc->howto->bitsize)
4179 code = BFD_RELOC_14;
4182 code = BFD_RELOC_16;
4185 code = BFD_RELOC_26;
4188 code = BFD_RELOC_32;
4191 code = BFD_RELOC_64;
4197 howto = bfd_reloc_type_lookup (abfd, code);
4201 areloc->howto = howto;
4209 (*_bfd_error_handler)
4210 ("%s: unsupported relocation type %s",
4211 bfd_get_filename (abfd), areloc->howto->name);
4212 bfd_set_error (bfd_error_bad_value);