2 Copyright 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. */
20 /* ELF linker code. */
22 static boolean elf_link_add_object_symbols
23 PARAMS ((bfd *, struct bfd_link_info *));
24 static boolean elf_link_add_archive_symbols
25 PARAMS ((bfd *, struct bfd_link_info *));
26 static boolean elf_export_symbol
27 PARAMS ((struct elf_link_hash_entry *, PTR));
28 static boolean elf_adjust_dynamic_symbol
29 PARAMS ((struct elf_link_hash_entry *, PTR));
30 static boolean elf_link_find_version_dependencies
31 PARAMS ((struct elf_link_hash_entry *, PTR));
32 static boolean elf_link_find_version_dependencies
33 PARAMS ((struct elf_link_hash_entry *, PTR));
34 static boolean elf_link_assign_sym_version
35 PARAMS ((struct elf_link_hash_entry *, PTR));
36 static boolean elf_link_renumber_dynsyms
37 PARAMS ((struct elf_link_hash_entry *, PTR));
39 /* This struct is used to pass information to routines called via
40 elf_link_hash_traverse which must return failure. */
42 struct elf_info_failed
45 struct bfd_link_info *info;
48 /* Given an ELF BFD, add symbols to the global hash table as
52 elf_bfd_link_add_symbols (abfd, info)
54 struct bfd_link_info *info;
56 switch (bfd_get_format (abfd))
59 return elf_link_add_object_symbols (abfd, info);
61 return elf_link_add_archive_symbols (abfd, info);
63 bfd_set_error (bfd_error_wrong_format);
69 /* Add symbols from an ELF archive file to the linker hash table. We
70 don't use _bfd_generic_link_add_archive_symbols because of a
71 problem which arises on UnixWare. The UnixWare libc.so is an
72 archive which includes an entry libc.so.1 which defines a bunch of
73 symbols. The libc.so archive also includes a number of other
74 object files, which also define symbols, some of which are the same
75 as those defined in libc.so.1. Correct linking requires that we
76 consider each object file in turn, and include it if it defines any
77 symbols we need. _bfd_generic_link_add_archive_symbols does not do
78 this; it looks through the list of undefined symbols, and includes
79 any object file which defines them. When this algorithm is used on
80 UnixWare, it winds up pulling in libc.so.1 early and defining a
81 bunch of symbols. This means that some of the other objects in the
82 archive are not included in the link, which is incorrect since they
83 precede libc.so.1 in the archive.
85 Fortunately, ELF archive handling is simpler than that done by
86 _bfd_generic_link_add_archive_symbols, which has to allow for a.out
87 oddities. In ELF, if we find a symbol in the archive map, and the
88 symbol is currently undefined, we know that we must pull in that
91 Unfortunately, we do have to make multiple passes over the symbol
92 table until nothing further is resolved. */
95 elf_link_add_archive_symbols (abfd, info)
97 struct bfd_link_info *info;
100 boolean *defined = NULL;
101 boolean *included = NULL;
105 if (! bfd_has_map (abfd))
107 /* An empty archive is a special case. */
108 if (bfd_openr_next_archived_file (abfd, (bfd *) NULL) == NULL)
110 bfd_set_error (bfd_error_no_armap);
114 /* Keep track of all symbols we know to be already defined, and all
115 files we know to be already included. This is to speed up the
116 second and subsequent passes. */
117 c = bfd_ardata (abfd)->symdef_count;
120 defined = (boolean *) bfd_malloc (c * sizeof (boolean));
121 included = (boolean *) bfd_malloc (c * sizeof (boolean));
122 if (defined == (boolean *) NULL || included == (boolean *) NULL)
124 memset (defined, 0, c * sizeof (boolean));
125 memset (included, 0, c * sizeof (boolean));
127 symdefs = bfd_ardata (abfd)->symdefs;
140 symdefend = symdef + c;
141 for (i = 0; symdef < symdefend; symdef++, i++)
143 struct elf_link_hash_entry *h;
145 struct bfd_link_hash_entry *undefs_tail;
148 if (defined[i] || included[i])
150 if (symdef->file_offset == last)
156 h = elf_link_hash_lookup (elf_hash_table (info), symdef->name,
157 false, false, false);
163 /* If this is a default version (the name contains @@),
164 look up the symbol again without the version. The
165 effect is that references to the symbol without the
166 version will be matched by the default symbol in the
169 p = strchr (symdef->name, ELF_VER_CHR);
170 if (p == NULL || p[1] != ELF_VER_CHR)
173 copy = bfd_alloc (abfd, p - symdef->name + 1);
176 memcpy (copy, symdef->name, p - symdef->name);
177 copy[p - symdef->name] = '\0';
179 h = elf_link_hash_lookup (elf_hash_table (info), copy,
180 false, false, false);
182 bfd_release (abfd, copy);
188 if (h->root.type != bfd_link_hash_undefined)
190 if (h->root.type != bfd_link_hash_undefweak)
195 /* We need to include this archive member. */
197 element = _bfd_get_elt_at_filepos (abfd, symdef->file_offset);
198 if (element == (bfd *) NULL)
201 if (! bfd_check_format (element, bfd_object))
204 /* Doublecheck that we have not included this object
205 already--it should be impossible, but there may be
206 something wrong with the archive. */
207 if (element->archive_pass != 0)
209 bfd_set_error (bfd_error_bad_value);
212 element->archive_pass = 1;
214 undefs_tail = info->hash->undefs_tail;
216 if (! (*info->callbacks->add_archive_element) (info, element,
219 if (! elf_link_add_object_symbols (element, info))
222 /* If there are any new undefined symbols, we need to make
223 another pass through the archive in order to see whether
224 they can be defined. FIXME: This isn't perfect, because
225 common symbols wind up on undefs_tail and because an
226 undefined symbol which is defined later on in this pass
227 does not require another pass. This isn't a bug, but it
228 does make the code less efficient than it could be. */
229 if (undefs_tail != info->hash->undefs_tail)
232 /* Look backward to mark all symbols from this object file
233 which we have already seen in this pass. */
237 included[mark] = true;
242 while (symdefs[mark].file_offset == symdef->file_offset);
244 /* We mark subsequent symbols from this object file as we go
245 on through the loop. */
246 last = symdef->file_offset;
257 if (defined != (boolean *) NULL)
259 if (included != (boolean *) NULL)
264 /* Add symbols from an ELF object file to the linker hash table. */
267 elf_link_add_object_symbols (abfd, info)
269 struct bfd_link_info *info;
271 boolean (*add_symbol_hook) PARAMS ((bfd *, struct bfd_link_info *,
272 const Elf_Internal_Sym *,
273 const char **, flagword *,
274 asection **, bfd_vma *));
275 boolean (*check_relocs) PARAMS ((bfd *, struct bfd_link_info *,
276 asection *, const Elf_Internal_Rela *));
278 Elf_Internal_Shdr *hdr;
282 Elf_External_Sym *buf = NULL;
283 struct elf_link_hash_entry **sym_hash;
285 bfd_byte *dynver = NULL;
286 Elf_External_Versym *extversym = NULL;
287 Elf_External_Versym *ever;
288 Elf_External_Dyn *dynbuf = NULL;
289 struct elf_link_hash_entry *weaks;
290 Elf_External_Sym *esym;
291 Elf_External_Sym *esymend;
293 add_symbol_hook = get_elf_backend_data (abfd)->elf_add_symbol_hook;
294 collect = get_elf_backend_data (abfd)->collect;
296 if ((abfd->flags & DYNAMIC) == 0)
302 /* You can't use -r against a dynamic object. Also, there's no
303 hope of using a dynamic object which does not exactly match
304 the format of the output file. */
305 if (info->relocateable || info->hash->creator != abfd->xvec)
307 bfd_set_error (bfd_error_invalid_operation);
312 /* As a GNU extension, any input sections which are named
313 .gnu.warning.SYMBOL are treated as warning symbols for the given
314 symbol. This differs from .gnu.warning sections, which generate
315 warnings when they are included in an output file. */
320 for (s = abfd->sections; s != NULL; s = s->next)
324 name = bfd_get_section_name (abfd, s);
325 if (strncmp (name, ".gnu.warning.", sizeof ".gnu.warning." - 1) == 0)
330 name += sizeof ".gnu.warning." - 1;
332 /* If this is a shared object, then look up the symbol
333 in the hash table. If it is there, and it is already
334 been defined, then we will not be using the entry
335 from this shared object, so we don't need to warn.
336 FIXME: If we see the definition in a regular object
337 later on, we will warn, but we shouldn't. The only
338 fix is to keep track of what warnings we are supposed
339 to emit, and then handle them all at the end of the
341 if (dynamic && abfd->xvec == info->hash->creator)
343 struct elf_link_hash_entry *h;
345 h = elf_link_hash_lookup (elf_hash_table (info), name,
348 /* FIXME: What about bfd_link_hash_common? */
350 && (h->root.type == bfd_link_hash_defined
351 || h->root.type == bfd_link_hash_defweak))
353 /* We don't want to issue this warning. Clobber
354 the section size so that the warning does not
355 get copied into the output file. */
361 sz = bfd_section_size (abfd, s);
362 msg = (char *) bfd_alloc (abfd, sz);
366 if (! bfd_get_section_contents (abfd, s, msg, (file_ptr) 0, sz))
369 if (! (_bfd_generic_link_add_one_symbol
370 (info, abfd, name, BSF_WARNING, s, (bfd_vma) 0, msg,
371 false, collect, (struct bfd_link_hash_entry **) NULL)))
374 if (! info->relocateable)
376 /* Clobber the section size so that the warning does
377 not get copied into the output file. */
384 /* If this is a dynamic object, we always link against the .dynsym
385 symbol table, not the .symtab symbol table. The dynamic linker
386 will only see the .dynsym symbol table, so there is no reason to
387 look at .symtab for a dynamic object. */
389 if (! dynamic || elf_dynsymtab (abfd) == 0)
390 hdr = &elf_tdata (abfd)->symtab_hdr;
392 hdr = &elf_tdata (abfd)->dynsymtab_hdr;
396 /* Read in any version definitions. */
398 if (elf_dynverdef (abfd) != 0)
400 Elf_Internal_Shdr *verdefhdr;
403 const Elf_External_Verdef *extverdef;
404 Elf_Internal_Verdef *intverdef;
406 verdefhdr = &elf_tdata (abfd)->dynverdef_hdr;
407 elf_tdata (abfd)->verdef =
408 ((Elf_Internal_Verdef *)
410 verdefhdr->sh_info * sizeof (Elf_Internal_Verdef)));
411 if (elf_tdata (abfd)->verdef == NULL)
414 dynver = (bfd_byte *) bfd_malloc (verdefhdr->sh_size);
418 if (bfd_seek (abfd, verdefhdr->sh_offset, SEEK_SET) != 0
419 || (bfd_read ((PTR) dynver, 1, verdefhdr->sh_size, abfd)
420 != verdefhdr->sh_size))
423 extverdef = (const Elf_External_Verdef *) dynver;
424 intverdef = elf_tdata (abfd)->verdef;
425 for (i = 0; i < verdefhdr->sh_info; i++, intverdef++)
427 const Elf_External_Verdaux *extverdaux;
428 Elf_Internal_Verdaux intverdaux;
430 _bfd_elf_swap_verdef_in (abfd, extverdef, intverdef);
432 /* Pick up the name of the version. */
433 extverdaux = ((const Elf_External_Verdaux *)
434 ((bfd_byte *) extverdef + intverdef->vd_aux));
435 _bfd_elf_swap_verdaux_in (abfd, extverdaux, &intverdaux);
437 intverdef->vd_bfd = abfd;
438 intverdef->vd_nodename =
439 bfd_elf_string_from_elf_section (abfd, verdefhdr->sh_link,
440 intverdaux.vda_name);
442 extverdef = ((const Elf_External_Verdef *)
443 ((bfd_byte *) extverdef + intverdef->vd_next));
450 /* Read in the symbol versions, but don't bother to convert them
451 to internal format. */
452 if (elf_dynversym (abfd) != 0)
454 Elf_Internal_Shdr *versymhdr;
456 versymhdr = &elf_tdata (abfd)->dynversym_hdr;
457 extversym = (Elf_External_Versym *) bfd_malloc (hdr->sh_size);
458 if (extversym == NULL)
460 if (bfd_seek (abfd, versymhdr->sh_offset, SEEK_SET) != 0
461 || (bfd_read ((PTR) extversym, 1, versymhdr->sh_size, abfd)
462 != versymhdr->sh_size))
467 symcount = hdr->sh_size / sizeof (Elf_External_Sym);
469 /* The sh_info field of the symtab header tells us where the
470 external symbols start. We don't care about the local symbols at
472 if (elf_bad_symtab (abfd))
474 extsymcount = symcount;
479 extsymcount = symcount - hdr->sh_info;
480 extsymoff = hdr->sh_info;
483 buf = ((Elf_External_Sym *)
484 bfd_malloc (extsymcount * sizeof (Elf_External_Sym)));
485 if (buf == NULL && extsymcount != 0)
488 /* We store a pointer to the hash table entry for each external
490 sym_hash = ((struct elf_link_hash_entry **)
492 extsymcount * sizeof (struct elf_link_hash_entry *)));
493 if (sym_hash == NULL)
495 elf_sym_hashes (abfd) = sym_hash;
499 /* If we are creating a shared library, create all the dynamic
500 sections immediately. We need to attach them to something,
501 so we attach them to this BFD, provided it is the right
502 format. FIXME: If there are no input BFD's of the same
503 format as the output, we can't make a shared library. */
505 && ! elf_hash_table (info)->dynamic_sections_created
506 && abfd->xvec == info->hash->creator)
508 if (! elf_link_create_dynamic_sections (abfd, info))
517 bfd_size_type oldsize;
518 bfd_size_type strindex;
520 /* Find the name to use in a DT_NEEDED entry that refers to this
521 object. If the object has a DT_SONAME entry, we use it.
522 Otherwise, if the generic linker stuck something in
523 elf_dt_name, we use that. Otherwise, we just use the file
524 name. If the generic linker put a null string into
525 elf_dt_name, we don't make a DT_NEEDED entry at all, even if
526 there is a DT_SONAME entry. */
528 name = bfd_get_filename (abfd);
529 if (elf_dt_name (abfd) != NULL)
531 name = elf_dt_name (abfd);
535 s = bfd_get_section_by_name (abfd, ".dynamic");
538 Elf_External_Dyn *extdyn;
539 Elf_External_Dyn *extdynend;
543 dynbuf = (Elf_External_Dyn *) bfd_malloc ((size_t) s->_raw_size);
547 if (! bfd_get_section_contents (abfd, s, (PTR) dynbuf,
548 (file_ptr) 0, s->_raw_size))
551 elfsec = _bfd_elf_section_from_bfd_section (abfd, s);
554 link = elf_elfsections (abfd)[elfsec]->sh_link;
557 extdynend = extdyn + s->_raw_size / sizeof (Elf_External_Dyn);
558 for (; extdyn < extdynend; extdyn++)
560 Elf_Internal_Dyn dyn;
562 elf_swap_dyn_in (abfd, extdyn, &dyn);
563 if (dyn.d_tag == DT_SONAME)
565 name = bfd_elf_string_from_elf_section (abfd, link,
570 if (dyn.d_tag == DT_NEEDED)
572 struct bfd_link_needed_list *n, **pn;
575 n = ((struct bfd_link_needed_list *)
576 bfd_alloc (abfd, sizeof (struct bfd_link_needed_list)));
577 fnm = bfd_elf_string_from_elf_section (abfd, link,
579 if (n == NULL || fnm == NULL)
581 anm = bfd_alloc (abfd, strlen (fnm) + 1);
588 for (pn = &elf_hash_table (info)->needed;
600 /* We do not want to include any of the sections in a dynamic
601 object in the output file. We hack by simply clobbering the
602 list of sections in the BFD. This could be handled more
603 cleanly by, say, a new section flag; the existing
604 SEC_NEVER_LOAD flag is not the one we want, because that one
605 still implies that the section takes up space in the output
607 abfd->sections = NULL;
608 abfd->section_count = 0;
610 /* If this is the first dynamic object found in the link, create
611 the special sections required for dynamic linking. */
612 if (! elf_hash_table (info)->dynamic_sections_created)
614 if (! elf_link_create_dynamic_sections (abfd, info))
620 /* Add a DT_NEEDED entry for this dynamic object. */
621 oldsize = _bfd_stringtab_size (elf_hash_table (info)->dynstr);
622 strindex = _bfd_stringtab_add (elf_hash_table (info)->dynstr, name,
624 if (strindex == (bfd_size_type) -1)
627 if (oldsize == _bfd_stringtab_size (elf_hash_table (info)->dynstr))
630 Elf_External_Dyn *dyncon, *dynconend;
632 /* The hash table size did not change, which means that
633 the dynamic object name was already entered. If we
634 have already included this dynamic object in the
635 link, just ignore it. There is no reason to include
636 a particular dynamic object more than once. */
637 sdyn = bfd_get_section_by_name (elf_hash_table (info)->dynobj,
639 BFD_ASSERT (sdyn != NULL);
641 dyncon = (Elf_External_Dyn *) sdyn->contents;
642 dynconend = (Elf_External_Dyn *) (sdyn->contents +
644 for (; dyncon < dynconend; dyncon++)
646 Elf_Internal_Dyn dyn;
648 elf_swap_dyn_in (elf_hash_table (info)->dynobj, dyncon,
650 if (dyn.d_tag == DT_NEEDED
651 && dyn.d_un.d_val == strindex)
655 if (extversym != NULL)
662 if (! elf_add_dynamic_entry (info, DT_NEEDED, strindex))
666 /* Save the SONAME, if there is one, because sometimes the
667 linker emulation code will need to know it. */
669 name = bfd_get_filename (abfd);
670 elf_dt_name (abfd) = name;
674 hdr->sh_offset + extsymoff * sizeof (Elf_External_Sym),
676 || (bfd_read ((PTR) buf, sizeof (Elf_External_Sym), extsymcount, abfd)
677 != extsymcount * sizeof (Elf_External_Sym)))
682 ever = extversym != NULL ? extversym + extsymoff : NULL;
683 esymend = buf + extsymcount;
686 esym++, sym_hash++, ever = (ever != NULL ? ever + 1 : NULL))
688 Elf_Internal_Sym sym;
694 struct elf_link_hash_entry *h;
696 boolean size_change_ok, type_change_ok;
699 elf_swap_symbol_in (abfd, esym, &sym);
701 flags = BSF_NO_FLAGS;
703 value = sym.st_value;
706 bind = ELF_ST_BIND (sym.st_info);
707 if (bind == STB_LOCAL)
709 /* This should be impossible, since ELF requires that all
710 global symbols follow all local symbols, and that sh_info
711 point to the first global symbol. Unfortunatealy, Irix 5
715 else if (bind == STB_GLOBAL)
717 if (sym.st_shndx != SHN_UNDEF
718 && sym.st_shndx != SHN_COMMON)
723 else if (bind == STB_WEAK)
727 /* Leave it up to the processor backend. */
730 if (sym.st_shndx == SHN_UNDEF)
731 sec = bfd_und_section_ptr;
732 else if (sym.st_shndx > 0 && sym.st_shndx < SHN_LORESERVE)
734 sec = section_from_elf_index (abfd, sym.st_shndx);
738 sec = bfd_abs_section_ptr;
740 else if (sym.st_shndx == SHN_ABS)
741 sec = bfd_abs_section_ptr;
742 else if (sym.st_shndx == SHN_COMMON)
744 sec = bfd_com_section_ptr;
745 /* What ELF calls the size we call the value. What ELF
746 calls the value we call the alignment. */
751 /* Leave it up to the processor backend. */
754 name = bfd_elf_string_from_elf_section (abfd, hdr->sh_link, sym.st_name);
755 if (name == (const char *) NULL)
760 if (! (*add_symbol_hook) (abfd, info, &sym, &name, &flags, &sec,
764 /* The hook function sets the name to NULL if this symbol
765 should be skipped for some reason. */
766 if (name == (const char *) NULL)
770 /* Sanity check that all possibilities were handled. */
771 if (sec == (asection *) NULL)
773 bfd_set_error (bfd_error_bad_value);
777 if (bfd_is_und_section (sec)
778 || bfd_is_com_section (sec))
783 size_change_ok = false;
784 type_change_ok = get_elf_backend_data (abfd)->type_change_ok;
785 if (info->hash->creator->flavour == bfd_target_elf_flavour)
787 Elf_Internal_Versym iver;
793 _bfd_elf_swap_versym_in (abfd, ever, &iver);
794 vernum = iver.vs_vers & VERSYM_VERSION;
796 /* If this is a hidden symbol, or if it is not version
797 1, we append the version name to the symbol name.
798 However, we do not modify a non-hidden absolute
799 symbol, because it might be the version symbol
800 itself. FIXME: What if it isn't? */
801 if ((iver.vs_vers & VERSYM_HIDDEN) != 0
802 || (vernum > 1 && ! bfd_is_abs_section (sec)))
808 if (vernum > elf_tdata (abfd)->dynverdef_hdr.sh_info)
810 (*_bfd_error_handler)
811 ("%s: %s: invalid version %d (max %d)",
812 abfd->filename, name, vernum,
813 elf_tdata (abfd)->dynverdef_hdr.sh_info);
814 bfd_set_error (bfd_error_bad_value);
818 verstr = elf_tdata (abfd)->verdef[vernum - 1].vd_nodename;
822 namelen = strlen (name);
823 newlen = namelen + strlen (verstr) + 2;
824 if ((iver.vs_vers & VERSYM_HIDDEN) == 0)
827 newname = (char *) bfd_alloc (abfd, newlen);
830 strcpy (newname, name);
831 p = newname + namelen;
833 if ((iver.vs_vers & VERSYM_HIDDEN) == 0)
841 /* We need to look up the symbol now in order to get some of
842 the dynamic object handling right. We pass the hash
843 table entry in to _bfd_generic_link_add_one_symbol so
844 that it does not have to look it up again. */
845 if (! bfd_is_und_section (sec))
846 h = elf_link_hash_lookup (elf_hash_table (info), name,
849 h = ((struct elf_link_hash_entry *)
850 bfd_wrapped_link_hash_lookup (abfd, info, name, true,
856 if (h->root.type == bfd_link_hash_new)
857 h->elf_link_hash_flags &=~ ELF_LINK_NON_ELF;
859 while (h->root.type == bfd_link_hash_indirect
860 || h->root.type == bfd_link_hash_warning)
861 h = (struct elf_link_hash_entry *) h->root.u.i.link;
863 /* It's OK to change the type if it used to be a weak
864 definition, or if the current definition is weak (and
865 hence might be ignored). */
866 if (h->root.type == bfd_link_hash_defweak
867 || h->root.type == bfd_link_hash_undefweak
869 type_change_ok = true;
871 /* It's OK to change the size if it used to be a weak
872 definition, or if it used to be undefined, or if we will
873 be overriding an old definition. */
875 || h->root.type == bfd_link_hash_undefined)
876 size_change_ok = true;
880 /* If we are looking at a dynamic object, and this is a
881 definition, we need to see if it has already been defined
882 by some other object. If it has, we want to use the
883 existing definition, and we do not want to report a
884 multiple symbol definition error; we do this by
885 clobbering sec to be bfd_und_section_ptr. We treat a
886 common symbol as a definition if the symbol in the shared
887 library is a function, since common symbols always
888 represent variables; this can cause confusion in
889 principle, but any such confusion would seem to indicate
890 an erroneous program or shared library. We also treat a
891 common symbol as a definition if the symbol in the shared
892 library is in an uninitialized section, and it has a
894 if (dynamic && definition)
896 if (h->root.type == bfd_link_hash_defined
897 || h->root.type == bfd_link_hash_defweak
898 || (h->root.type == bfd_link_hash_common
899 && ((bind == STB_WEAK
900 || ELF_ST_TYPE (sym.st_info) == STT_FUNC)
901 || ((sec->flags & SEC_ALLOC) != 0
902 && (sec->flags & SEC_LOAD) == 0
903 && sym.st_size < h->size))))
906 sec = bfd_und_section_ptr;
908 size_change_ok = true;
909 if (h->root.type == bfd_link_hash_common)
910 type_change_ok = true;
914 /* Similarly, if we are not looking at a dynamic object, and
915 we have a definition, we want to override any definition
916 we may have from a dynamic object. Symbols from regular
917 files always take precedence over symbols from dynamic
918 objects, even if they are defined after the dynamic
919 object in the link. */
922 || (bfd_is_com_section (sec)
923 && (h->root.type == bfd_link_hash_defweak
924 || h->type == STT_FUNC)))
925 && (h->root.type == bfd_link_hash_defined
926 || h->root.type == bfd_link_hash_defweak)
927 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
928 && (h->root.u.def.section->owner->flags & DYNAMIC) != 0)
931 /* Change the hash table entry to undefined, and let
932 _bfd_generic_link_add_one_symbol do the right thing
933 with the new definition. */
934 h->root.type = bfd_link_hash_undefined;
935 h->root.u.undef.abfd = h->root.u.def.section->owner;
936 size_change_ok = true;
937 if (bfd_is_com_section (sec))
938 type_change_ok = true;
940 /* This union may have been set to be non-NULL when this
941 symbol was seen in a dynamic object. We must force
942 the union to be NULL, so that it is correct for a
944 h->verinfo.vertree = NULL;
950 && (h->verinfo.verdef == NULL || definition))
951 h->verinfo.verdef = &elf_tdata (abfd)->verdef[vernum - 1];
954 if (! (_bfd_generic_link_add_one_symbol
955 (info, abfd, name, flags, sec, value, (const char *) NULL,
956 false, collect, (struct bfd_link_hash_entry **) sym_hash)))
960 while (h->root.type == bfd_link_hash_indirect
961 || h->root.type == bfd_link_hash_warning)
962 h = (struct elf_link_hash_entry *) h->root.u.i.link;
968 && (flags & BSF_WEAK) != 0
969 && ELF_ST_TYPE (sym.st_info) != STT_FUNC
970 && info->hash->creator->flavour == bfd_target_elf_flavour
971 && h->weakdef == NULL)
973 /* Keep a list of all weak defined non function symbols from
974 a dynamic object, using the weakdef field. Later in this
975 function we will set the weakdef field to the correct
976 value. We only put non-function symbols from dynamic
977 objects on this list, because that happens to be the only
978 time we need to know the normal symbol corresponding to a
979 weak symbol, and the information is time consuming to
980 figure out. If the weakdef field is not already NULL,
981 then this symbol was already defined by some previous
982 dynamic object, and we will be using that previous
983 definition anyhow. */
990 /* Get the alignment of a common symbol. */
991 if (sym.st_shndx == SHN_COMMON
992 && h->root.type == bfd_link_hash_common)
993 h->root.u.c.p->alignment_power = bfd_log2 (sym.st_value);
995 if (info->hash->creator->flavour == bfd_target_elf_flavour)
1001 /* Remember the symbol size and type. */
1002 if (sym.st_size != 0
1003 && (definition || h->size == 0))
1005 if (h->size != 0 && h->size != sym.st_size && ! size_change_ok)
1006 (*_bfd_error_handler)
1007 ("Warning: size of symbol `%s' changed from %lu to %lu in %s",
1008 name, (unsigned long) h->size, (unsigned long) sym.st_size,
1009 bfd_get_filename (abfd));
1011 h->size = sym.st_size;
1013 if (ELF_ST_TYPE (sym.st_info) != STT_NOTYPE
1014 && (definition || h->type == STT_NOTYPE))
1016 if (h->type != STT_NOTYPE
1017 && h->type != ELF_ST_TYPE (sym.st_info)
1018 && ! type_change_ok)
1019 (*_bfd_error_handler)
1020 ("Warning: type of symbol `%s' changed from %d to %d in %s",
1021 name, h->type, ELF_ST_TYPE (sym.st_info),
1022 bfd_get_filename (abfd));
1024 h->type = ELF_ST_TYPE (sym.st_info);
1027 if (sym.st_other != 0
1028 && (definition || h->other == 0))
1029 h->other = sym.st_other;
1031 /* Set a flag in the hash table entry indicating the type of
1032 reference or definition we just found. Keep a count of
1033 the number of dynamic symbols we find. A dynamic symbol
1034 is one which is referenced or defined by both a regular
1035 object and a shared object. */
1036 old_flags = h->elf_link_hash_flags;
1041 new_flag = ELF_LINK_HASH_REF_REGULAR;
1043 new_flag = ELF_LINK_HASH_DEF_REGULAR;
1045 || (old_flags & (ELF_LINK_HASH_DEF_DYNAMIC
1046 | ELF_LINK_HASH_REF_DYNAMIC)) != 0)
1052 new_flag = ELF_LINK_HASH_REF_DYNAMIC;
1054 new_flag = ELF_LINK_HASH_DEF_DYNAMIC;
1055 if ((old_flags & (ELF_LINK_HASH_DEF_REGULAR
1056 | ELF_LINK_HASH_REF_REGULAR)) != 0
1057 || (h->weakdef != NULL
1059 && h->weakdef->dynindx != -1))
1063 h->elf_link_hash_flags |= new_flag;
1065 /* If this symbol has a version, and it is the default
1066 version, we create an indirect symbol from the default
1067 name to the fully decorated name. This will cause
1068 external references which do not specify a version to be
1069 bound to this version of the symbol. */
1074 p = strchr (name, ELF_VER_CHR);
1075 if (p != NULL && p[1] == ELF_VER_CHR)
1078 struct elf_link_hash_entry *hold;
1080 shortname = bfd_hash_allocate (&info->hash->table,
1082 if (shortname == NULL)
1084 strncpy (shortname, name, p - name);
1085 shortname[p - name] = '\0';
1087 /* First look to see if we have an existing symbol
1089 hold = elf_link_hash_lookup (elf_hash_table (info),
1090 shortname, false, false,
1093 /* If we are looking at a normal object, and the
1094 symbol was seen in a shared object, clobber the
1095 definition in the shared object. */
1098 && (hold->root.type == bfd_link_hash_defined
1099 || hold->root.type == bfd_link_hash_defweak)
1100 && (hold->elf_link_hash_flags
1101 & ELF_LINK_HASH_DEF_DYNAMIC) != 0
1102 && ((hold->root.u.def.section->owner->flags & DYNAMIC)
1105 /* Change the hash table entry to undefined, so
1106 that _bfd_generic_link_add_one_symbol will do
1108 hold->root.type = bfd_link_hash_undefined;
1109 hold->root.u.undef.abfd =
1110 hold->root.u.def.section->owner;
1111 hold->verinfo.vertree = NULL;
1115 /* If we are looking at a shared object, and we have
1116 already seen this symbol defined elsewhere, then
1117 don't try to define it again. */
1120 && (hold->root.type == bfd_link_hash_defined
1121 || hold->root.type == bfd_link_hash_defweak
1122 || hold->root.type == bfd_link_hash_indirect
1123 || (hold->root.type == bfd_link_hash_common
1124 && (bind == STB_WEAK
1125 || ELF_ST_TYPE (sym.st_info) == STT_FUNC))))
1127 /* Don't add an indirect symbol. */
1131 struct elf_link_hash_entry *hi;
1134 if (! (_bfd_generic_link_add_one_symbol
1135 (info, abfd, shortname, BSF_INDIRECT,
1136 bfd_ind_section_ptr, (bfd_vma) 0, name, false,
1137 collect, (struct bfd_link_hash_entry **) &hi)))
1140 /* If there is a duplicate definition somewhere,
1141 then HI may not point to an indirect symbol.
1142 We will have reported an error to the user in
1145 if (hi->root.type == bfd_link_hash_indirect)
1147 hi->elf_link_hash_flags &= ~ ELF_LINK_NON_ELF;
1149 /* If the symbol became indirect, then we
1150 assume that we have not seen a definition
1152 BFD_ASSERT ((hi->elf_link_hash_flags
1153 & (ELF_LINK_HASH_DEF_DYNAMIC
1154 | ELF_LINK_HASH_DEF_REGULAR))
1157 /* Copy down any references that we may have
1158 already seen to the symbol which just
1160 h->elf_link_hash_flags |=
1161 (hi->elf_link_hash_flags
1162 & (ELF_LINK_HASH_REF_DYNAMIC
1163 | ELF_LINK_HASH_REF_REGULAR));
1165 /* Copy over the global table offset entry.
1166 This may have been already set up by a
1167 check_relocs routine. */
1168 if (h->got_offset == (bfd_vma) -1)
1170 h->got_offset = hi->got_offset;
1171 hi->got_offset = (bfd_vma) -1;
1173 BFD_ASSERT (hi->got_offset == (bfd_vma) -1);
1175 if (h->dynindx == -1)
1177 h->dynindx = hi->dynindx;
1178 h->dynstr_index = hi->dynstr_index;
1180 hi->dynstr_index = 0;
1182 BFD_ASSERT (hi->dynindx == -1);
1184 /* FIXME: There may be other information to
1185 copy over for particular targets. */
1187 /* See if the new flags lead us to realize
1188 that the symbol must be dynamic. */
1194 || ((hi->elf_link_hash_flags
1195 & ELF_LINK_HASH_REF_DYNAMIC)
1201 if ((hi->elf_link_hash_flags
1202 & ELF_LINK_HASH_REF_REGULAR) != 0)
1209 /* We also need to define an indirection from the
1210 nondefault version of the symbol. */
1212 shortname = bfd_hash_allocate (&info->hash->table,
1214 if (shortname == NULL)
1216 strncpy (shortname, name, p - name);
1217 strcpy (shortname + (p - name), p + 1);
1219 /* First look to see if we have an existing symbol
1221 hold = elf_link_hash_lookup (elf_hash_table (info),
1222 shortname, false, false,
1225 /* If we are looking at a normal object, and the
1226 symbol was seen in a shared object, clobber the
1227 definition in the shared object. */
1230 && (hold->root.type == bfd_link_hash_defined
1231 || hold->root.type == bfd_link_hash_defweak)
1232 && (hold->elf_link_hash_flags
1233 & ELF_LINK_HASH_DEF_DYNAMIC) != 0
1234 && ((hold->root.u.def.section->owner->flags & DYNAMIC)
1237 /* Change the hash table entry to undefined, so
1238 that _bfd_generic_link_add_one_symbol will do
1240 hold->root.type = bfd_link_hash_undefined;
1241 hold->root.u.undef.abfd =
1242 hold->root.u.def.section->owner;
1243 hold->verinfo.vertree = NULL;
1247 /* If we are looking at a shared object, and we have
1248 already seen this symbol defined elsewhere, then
1249 don't try to define it again. */
1252 && (hold->root.type == bfd_link_hash_defined
1253 || hold->root.type == bfd_link_hash_defweak
1254 || hold->root.type == bfd_link_hash_indirect
1255 || (hold->root.type == bfd_link_hash_common
1256 && (bind == STB_WEAK
1257 || ELF_ST_TYPE (sym.st_info) == STT_FUNC))))
1259 /* Don't add an indirect symbol. */
1263 struct elf_link_hash_entry *hi;
1266 if (! (_bfd_generic_link_add_one_symbol
1267 (info, abfd, shortname, BSF_INDIRECT,
1268 bfd_ind_section_ptr, (bfd_vma) 0, name, false,
1269 collect, (struct bfd_link_hash_entry **) &hi)))
1272 /* If there is a duplicate definition somewhere,
1273 then HI may not point to an indirect symbol.
1274 We will have reported an error to the user in
1277 if (hi->root.type == bfd_link_hash_indirect)
1279 hi->elf_link_hash_flags &= ~ ELF_LINK_NON_ELF;
1281 /* If the symbol became indirect, then we
1282 assume that we have not seen a definition
1284 BFD_ASSERT ((hi->elf_link_hash_flags
1285 & (ELF_LINK_HASH_DEF_DYNAMIC
1286 | ELF_LINK_HASH_DEF_REGULAR))
1289 /* Copy down any references that we may have
1290 already seen to the symbol which just
1292 h->elf_link_hash_flags |=
1293 (hi->elf_link_hash_flags
1294 & (ELF_LINK_HASH_REF_DYNAMIC
1295 | ELF_LINK_HASH_REF_REGULAR));
1297 /* Copy over the global table offset entry.
1298 This may have been already set up by a
1299 check_relocs routine. */
1300 if (h->got_offset == (bfd_vma) -1)
1302 h->got_offset = hi->got_offset;
1303 hi->got_offset = (bfd_vma) -1;
1305 BFD_ASSERT (hi->got_offset == (bfd_vma) -1);
1307 if (h->dynindx == -1)
1309 h->dynindx = hi->dynindx;
1310 h->dynstr_index = hi->dynstr_index;
1312 hi->dynstr_index = 0;
1314 BFD_ASSERT (hi->dynindx == -1);
1316 /* FIXME: There may be other information to
1317 copy over for particular targets. */
1319 /* See if the new flags lead us to realize
1320 that the symbol must be dynamic. */
1326 || ((hi->elf_link_hash_flags
1327 & ELF_LINK_HASH_REF_DYNAMIC)
1333 if ((hi->elf_link_hash_flags
1334 & ELF_LINK_HASH_REF_REGULAR) != 0)
1343 if (dynsym && h->dynindx == -1)
1345 if (! _bfd_elf_link_record_dynamic_symbol (info, h))
1347 if (h->weakdef != NULL
1349 && h->weakdef->dynindx == -1)
1351 if (! _bfd_elf_link_record_dynamic_symbol (info,
1359 /* Now set the weakdefs field correctly for all the weak defined
1360 symbols we found. The only way to do this is to search all the
1361 symbols. Since we only need the information for non functions in
1362 dynamic objects, that's the only time we actually put anything on
1363 the list WEAKS. We need this information so that if a regular
1364 object refers to a symbol defined weakly in a dynamic object, the
1365 real symbol in the dynamic object is also put in the dynamic
1366 symbols; we also must arrange for both symbols to point to the
1367 same memory location. We could handle the general case of symbol
1368 aliasing, but a general symbol alias can only be generated in
1369 assembler code, handling it correctly would be very time
1370 consuming, and other ELF linkers don't handle general aliasing
1372 while (weaks != NULL)
1374 struct elf_link_hash_entry *hlook;
1377 struct elf_link_hash_entry **hpp;
1378 struct elf_link_hash_entry **hppend;
1381 weaks = hlook->weakdef;
1382 hlook->weakdef = NULL;
1384 BFD_ASSERT (hlook->root.type == bfd_link_hash_defined
1385 || hlook->root.type == bfd_link_hash_defweak
1386 || hlook->root.type == bfd_link_hash_common
1387 || hlook->root.type == bfd_link_hash_indirect);
1388 slook = hlook->root.u.def.section;
1389 vlook = hlook->root.u.def.value;
1391 hpp = elf_sym_hashes (abfd);
1392 hppend = hpp + extsymcount;
1393 for (; hpp < hppend; hpp++)
1395 struct elf_link_hash_entry *h;
1398 if (h != NULL && h != hlook
1399 && h->root.type == bfd_link_hash_defined
1400 && h->root.u.def.section == slook
1401 && h->root.u.def.value == vlook)
1405 /* If the weak definition is in the list of dynamic
1406 symbols, make sure the real definition is put there
1408 if (hlook->dynindx != -1
1409 && h->dynindx == -1)
1411 if (! _bfd_elf_link_record_dynamic_symbol (info, h))
1415 /* If the real definition is in the list of dynamic
1416 symbols, make sure the weak definition is put there
1417 as well. If we don't do this, then the dynamic
1418 loader might not merge the entries for the real
1419 definition and the weak definition. */
1420 if (h->dynindx != -1
1421 && hlook->dynindx == -1)
1423 if (! _bfd_elf_link_record_dynamic_symbol (info, hlook))
1438 if (extversym != NULL)
1444 /* If this object is the same format as the output object, and it is
1445 not a shared library, then let the backend look through the
1448 This is required to build global offset table entries and to
1449 arrange for dynamic relocs. It is not required for the
1450 particular common case of linking non PIC code, even when linking
1451 against shared libraries, but unfortunately there is no way of
1452 knowing whether an object file has been compiled PIC or not.
1453 Looking through the relocs is not particularly time consuming.
1454 The problem is that we must either (1) keep the relocs in memory,
1455 which causes the linker to require additional runtime memory or
1456 (2) read the relocs twice from the input file, which wastes time.
1457 This would be a good case for using mmap.
1459 I have no idea how to handle linking PIC code into a file of a
1460 different format. It probably can't be done. */
1461 check_relocs = get_elf_backend_data (abfd)->check_relocs;
1463 && abfd->xvec == info->hash->creator
1464 && check_relocs != NULL)
1468 for (o = abfd->sections; o != NULL; o = o->next)
1470 Elf_Internal_Rela *internal_relocs;
1473 if ((o->flags & SEC_RELOC) == 0
1474 || o->reloc_count == 0)
1477 internal_relocs = (NAME(_bfd_elf,link_read_relocs)
1478 (abfd, o, (PTR) NULL,
1479 (Elf_Internal_Rela *) NULL,
1480 info->keep_memory));
1481 if (internal_relocs == NULL)
1484 ok = (*check_relocs) (abfd, info, o, internal_relocs);
1486 if (! info->keep_memory)
1487 free (internal_relocs);
1494 /* If this is a non-traditional, non-relocateable link, try to
1495 optimize the handling of the .stab/.stabstr sections. */
1497 && ! info->relocateable
1498 && ! info->traditional_format
1499 && info->hash->creator->flavour == bfd_target_elf_flavour
1500 && (info->strip != strip_all && info->strip != strip_debugger))
1502 asection *stab, *stabstr;
1504 stab = bfd_get_section_by_name (abfd, ".stab");
1507 stabstr = bfd_get_section_by_name (abfd, ".stabstr");
1509 if (stabstr != NULL)
1511 struct bfd_elf_section_data *secdata;
1513 secdata = elf_section_data (stab);
1514 if (! _bfd_link_section_stabs (abfd,
1515 &elf_hash_table (info)->stab_info,
1517 &secdata->stab_info))
1532 if (extversym != NULL)
1537 /* Create some sections which will be filled in with dynamic linking
1538 information. ABFD is an input file which requires dynamic sections
1539 to be created. The dynamic sections take up virtual memory space
1540 when the final executable is run, so we need to create them before
1541 addresses are assigned to the output sections. We work out the
1542 actual contents and size of these sections later. */
1545 elf_link_create_dynamic_sections (abfd, info)
1547 struct bfd_link_info *info;
1550 register asection *s;
1551 struct elf_link_hash_entry *h;
1552 struct elf_backend_data *bed;
1554 if (elf_hash_table (info)->dynamic_sections_created)
1557 /* Make sure that all dynamic sections use the same input BFD. */
1558 if (elf_hash_table (info)->dynobj == NULL)
1559 elf_hash_table (info)->dynobj = abfd;
1561 abfd = elf_hash_table (info)->dynobj;
1563 /* Note that we set the SEC_IN_MEMORY flag for all of these
1565 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
1566 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
1568 /* A dynamically linked executable has a .interp section, but a
1569 shared library does not. */
1572 s = bfd_make_section (abfd, ".interp");
1574 || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY))
1578 /* Create sections to hold version informations. These are removed
1579 if they are not needed. */
1580 s = bfd_make_section (abfd, ".gnu.version_d");
1582 || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
1583 || ! bfd_set_section_alignment (abfd, s, 2))
1586 s = bfd_make_section (abfd, ".gnu.version");
1588 || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
1589 || ! bfd_set_section_alignment (abfd, s, 1))
1592 s = bfd_make_section (abfd, ".gnu.version_r");
1594 || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
1595 || ! bfd_set_section_alignment (abfd, s, 2))
1598 s = bfd_make_section (abfd, ".dynsym");
1600 || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
1601 || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN))
1604 s = bfd_make_section (abfd, ".dynstr");
1606 || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY))
1609 /* Create a strtab to hold the dynamic symbol names. */
1610 if (elf_hash_table (info)->dynstr == NULL)
1612 elf_hash_table (info)->dynstr = elf_stringtab_init ();
1613 if (elf_hash_table (info)->dynstr == NULL)
1617 s = bfd_make_section (abfd, ".dynamic");
1619 || ! bfd_set_section_flags (abfd, s, flags)
1620 || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN))
1623 /* The special symbol _DYNAMIC is always set to the start of the
1624 .dynamic section. This call occurs before we have processed the
1625 symbols for any dynamic object, so we don't have to worry about
1626 overriding a dynamic definition. We could set _DYNAMIC in a
1627 linker script, but we only want to define it if we are, in fact,
1628 creating a .dynamic section. We don't want to define it if there
1629 is no .dynamic section, since on some ELF platforms the start up
1630 code examines it to decide how to initialize the process. */
1632 if (! (_bfd_generic_link_add_one_symbol
1633 (info, abfd, "_DYNAMIC", BSF_GLOBAL, s, (bfd_vma) 0,
1634 (const char *) NULL, false, get_elf_backend_data (abfd)->collect,
1635 (struct bfd_link_hash_entry **) &h)))
1637 h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
1638 h->type = STT_OBJECT;
1641 && ! _bfd_elf_link_record_dynamic_symbol (info, h))
1644 s = bfd_make_section (abfd, ".hash");
1646 || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
1647 || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN))
1650 /* Let the backend create the rest of the sections. This lets the
1651 backend set the right flags. The backend will normally create
1652 the .got and .plt sections. */
1653 bed = get_elf_backend_data (abfd);
1654 if (! (*bed->elf_backend_create_dynamic_sections) (abfd, info))
1657 elf_hash_table (info)->dynamic_sections_created = true;
1662 /* Add an entry to the .dynamic table. */
1665 elf_add_dynamic_entry (info, tag, val)
1666 struct bfd_link_info *info;
1670 Elf_Internal_Dyn dyn;
1674 bfd_byte *newcontents;
1676 dynobj = elf_hash_table (info)->dynobj;
1678 s = bfd_get_section_by_name (dynobj, ".dynamic");
1679 BFD_ASSERT (s != NULL);
1681 newsize = s->_raw_size + sizeof (Elf_External_Dyn);
1682 newcontents = (bfd_byte *) bfd_realloc (s->contents, newsize);
1683 if (newcontents == NULL)
1687 dyn.d_un.d_val = val;
1688 elf_swap_dyn_out (dynobj, &dyn,
1689 (Elf_External_Dyn *) (newcontents + s->_raw_size));
1691 s->_raw_size = newsize;
1692 s->contents = newcontents;
1698 /* Read and swap the relocs for a section. They may have been cached.
1699 If the EXTERNAL_RELOCS and INTERNAL_RELOCS arguments are not NULL,
1700 they are used as buffers to read into. They are known to be large
1701 enough. If the INTERNAL_RELOCS relocs argument is NULL, the return
1702 value is allocated using either malloc or bfd_alloc, according to
1703 the KEEP_MEMORY argument. */
1706 NAME(_bfd_elf,link_read_relocs) (abfd, o, external_relocs, internal_relocs,
1710 PTR external_relocs;
1711 Elf_Internal_Rela *internal_relocs;
1712 boolean keep_memory;
1714 Elf_Internal_Shdr *rel_hdr;
1716 Elf_Internal_Rela *alloc2 = NULL;
1718 if (elf_section_data (o)->relocs != NULL)
1719 return elf_section_data (o)->relocs;
1721 if (o->reloc_count == 0)
1724 rel_hdr = &elf_section_data (o)->rel_hdr;
1726 if (internal_relocs == NULL)
1730 size = o->reloc_count * sizeof (Elf_Internal_Rela);
1732 internal_relocs = (Elf_Internal_Rela *) bfd_alloc (abfd, size);
1734 internal_relocs = alloc2 = (Elf_Internal_Rela *) bfd_malloc (size);
1735 if (internal_relocs == NULL)
1739 if (external_relocs == NULL)
1741 alloc1 = (PTR) bfd_malloc ((size_t) rel_hdr->sh_size);
1744 external_relocs = alloc1;
1747 if ((bfd_seek (abfd, rel_hdr->sh_offset, SEEK_SET) != 0)
1748 || (bfd_read (external_relocs, 1, rel_hdr->sh_size, abfd)
1749 != rel_hdr->sh_size))
1752 /* Swap in the relocs. For convenience, we always produce an
1753 Elf_Internal_Rela array; if the relocs are Rel, we set the addend
1755 if (rel_hdr->sh_entsize == sizeof (Elf_External_Rel))
1757 Elf_External_Rel *erel;
1758 Elf_External_Rel *erelend;
1759 Elf_Internal_Rela *irela;
1761 erel = (Elf_External_Rel *) external_relocs;
1762 erelend = erel + o->reloc_count;
1763 irela = internal_relocs;
1764 for (; erel < erelend; erel++, irela++)
1766 Elf_Internal_Rel irel;
1768 elf_swap_reloc_in (abfd, erel, &irel);
1769 irela->r_offset = irel.r_offset;
1770 irela->r_info = irel.r_info;
1771 irela->r_addend = 0;
1776 Elf_External_Rela *erela;
1777 Elf_External_Rela *erelaend;
1778 Elf_Internal_Rela *irela;
1780 BFD_ASSERT (rel_hdr->sh_entsize == sizeof (Elf_External_Rela));
1782 erela = (Elf_External_Rela *) external_relocs;
1783 erelaend = erela + o->reloc_count;
1784 irela = internal_relocs;
1785 for (; erela < erelaend; erela++, irela++)
1786 elf_swap_reloca_in (abfd, erela, irela);
1789 /* Cache the results for next time, if we can. */
1791 elf_section_data (o)->relocs = internal_relocs;
1796 /* Don't free alloc2, since if it was allocated we are passing it
1797 back (under the name of internal_relocs). */
1799 return internal_relocs;
1810 /* Record an assignment to a symbol made by a linker script. We need
1811 this in case some dynamic object refers to this symbol. */
1815 NAME(bfd_elf,record_link_assignment) (output_bfd, info, name, provide)
1817 struct bfd_link_info *info;
1821 struct elf_link_hash_entry *h;
1823 if (info->hash->creator->flavour != bfd_target_elf_flavour)
1826 h = elf_link_hash_lookup (elf_hash_table (info), name, true, true, false);
1830 if (h->root.type == bfd_link_hash_new)
1831 h->elf_link_hash_flags &=~ ELF_LINK_NON_ELF;
1833 /* If this symbol is being provided by the linker script, and it is
1834 currently defined by a dynamic object, but not by a regular
1835 object, then mark it as undefined so that the generic linker will
1836 force the correct value. */
1838 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
1839 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
1840 h->root.type = bfd_link_hash_undefined;
1842 h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
1843 h->type = STT_OBJECT;
1845 if (((h->elf_link_hash_flags & (ELF_LINK_HASH_DEF_DYNAMIC
1846 | ELF_LINK_HASH_REF_DYNAMIC)) != 0
1848 && h->dynindx == -1)
1850 if (! _bfd_elf_link_record_dynamic_symbol (info, h))
1853 /* If this is a weak defined symbol, and we know a corresponding
1854 real symbol from the same dynamic object, make sure the real
1855 symbol is also made into a dynamic symbol. */
1856 if (h->weakdef != NULL
1857 && h->weakdef->dynindx == -1)
1859 if (! _bfd_elf_link_record_dynamic_symbol (info, h->weakdef))
1867 /* This structure is used to pass information to
1868 elf_link_assign_sym_version. */
1870 struct elf_assign_sym_version_info
1874 /* General link information. */
1875 struct bfd_link_info *info;
1877 struct bfd_elf_version_tree *verdefs;
1878 /* Whether we are exporting all dynamic symbols. */
1879 boolean export_dynamic;
1880 /* Whether we removed any symbols from the dynamic symbol table. */
1881 boolean removed_dynamic;
1882 /* Whether we had a failure. */
1886 /* This structure is used to pass information to
1887 elf_link_find_version_dependencies. */
1889 struct elf_find_verdep_info
1893 /* General link information. */
1894 struct bfd_link_info *info;
1895 /* The number of dependencies. */
1897 /* Whether we had a failure. */
1901 /* Array used to determine the number of hash table buckets to use
1902 based on the number of symbols there are. If there are fewer than
1903 3 symbols we use 1 bucket, fewer than 17 symbols we use 3 buckets,
1904 fewer than 37 we use 17 buckets, and so forth. We never use more
1905 than 32771 buckets. */
1907 static const size_t elf_buckets[] =
1909 1, 3, 17, 37, 67, 97, 131, 197, 263, 521, 1031, 2053, 4099, 8209,
1913 /* Set up the sizes and contents of the ELF dynamic sections. This is
1914 called by the ELF linker emulation before_allocation routine. We
1915 must set the sizes of the sections before the linker sets the
1916 addresses of the various sections. */
1919 NAME(bfd_elf,size_dynamic_sections) (output_bfd, soname, rpath,
1920 export_dynamic, filter_shlib,
1921 auxiliary_filters, info, sinterpptr,
1926 boolean export_dynamic;
1927 const char *filter_shlib;
1928 const char * const *auxiliary_filters;
1929 struct bfd_link_info *info;
1930 asection **sinterpptr;
1931 struct bfd_elf_version_tree *verdefs;
1933 bfd_size_type soname_indx;
1935 struct elf_backend_data *bed;
1936 bfd_size_type old_dynsymcount;
1942 if (info->hash->creator->flavour != bfd_target_elf_flavour)
1945 /* The backend may have to create some sections regardless of whether
1946 we're dynamic or not. */
1947 bed = get_elf_backend_data (output_bfd);
1948 if (bed->elf_backend_always_size_sections
1949 && ! (*bed->elf_backend_always_size_sections) (output_bfd, info))
1952 dynobj = elf_hash_table (info)->dynobj;
1954 /* If there were no dynamic objects in the link, there is nothing to
1959 /* If we are supposed to export all symbols into the dynamic symbol
1960 table (this is not the normal case), then do so. */
1963 struct elf_info_failed eif;
1967 elf_link_hash_traverse (elf_hash_table (info), elf_export_symbol,
1973 if (elf_hash_table (info)->dynamic_sections_created)
1975 struct elf_info_failed eif;
1976 struct elf_link_hash_entry *h;
1977 bfd_size_type strsize;
1979 *sinterpptr = bfd_get_section_by_name (dynobj, ".interp");
1980 BFD_ASSERT (*sinterpptr != NULL || info->shared);
1984 soname_indx = _bfd_stringtab_add (elf_hash_table (info)->dynstr,
1985 soname, true, true);
1986 if (soname_indx == (bfd_size_type) -1
1987 || ! elf_add_dynamic_entry (info, DT_SONAME, soname_indx))
1993 if (! elf_add_dynamic_entry (info, DT_SYMBOLIC, 0))
2001 indx = _bfd_stringtab_add (elf_hash_table (info)->dynstr, rpath,
2003 if (indx == (bfd_size_type) -1
2004 || ! elf_add_dynamic_entry (info, DT_RPATH, indx))
2008 if (filter_shlib != NULL)
2012 indx = _bfd_stringtab_add (elf_hash_table (info)->dynstr,
2013 filter_shlib, true, true);
2014 if (indx == (bfd_size_type) -1
2015 || ! elf_add_dynamic_entry (info, DT_FILTER, indx))
2019 if (auxiliary_filters != NULL)
2021 const char * const *p;
2023 for (p = auxiliary_filters; *p != NULL; p++)
2027 indx = _bfd_stringtab_add (elf_hash_table (info)->dynstr,
2029 if (indx == (bfd_size_type) -1
2030 || ! elf_add_dynamic_entry (info, DT_AUXILIARY, indx))
2035 /* Find all symbols which were defined in a dynamic object and make
2036 the backend pick a reasonable value for them. */
2039 elf_link_hash_traverse (elf_hash_table (info),
2040 elf_adjust_dynamic_symbol,
2045 /* Add some entries to the .dynamic section. We fill in some of the
2046 values later, in elf_bfd_final_link, but we must add the entries
2047 now so that we know the final size of the .dynamic section. */
2048 h = elf_link_hash_lookup (elf_hash_table (info), "_init", false,
2051 && (h->elf_link_hash_flags & (ELF_LINK_HASH_REF_REGULAR
2052 | ELF_LINK_HASH_DEF_REGULAR)) != 0)
2054 if (! elf_add_dynamic_entry (info, DT_INIT, 0))
2057 h = elf_link_hash_lookup (elf_hash_table (info), "_fini", false,
2060 && (h->elf_link_hash_flags & (ELF_LINK_HASH_REF_REGULAR
2061 | ELF_LINK_HASH_DEF_REGULAR)) != 0)
2063 if (! elf_add_dynamic_entry (info, DT_FINI, 0))
2066 strsize = _bfd_stringtab_size (elf_hash_table (info)->dynstr);
2067 if (! elf_add_dynamic_entry (info, DT_HASH, 0)
2068 || ! elf_add_dynamic_entry (info, DT_STRTAB, 0)
2069 || ! elf_add_dynamic_entry (info, DT_SYMTAB, 0)
2070 || ! elf_add_dynamic_entry (info, DT_STRSZ, strsize)
2071 || ! elf_add_dynamic_entry (info, DT_SYMENT,
2072 sizeof (Elf_External_Sym)))
2076 /* The backend must work out the sizes of all the other dynamic
2078 old_dynsymcount = elf_hash_table (info)->dynsymcount;
2079 if (! (*bed->elf_backend_size_dynamic_sections) (output_bfd, info))
2082 if (elf_hash_table (info)->dynamic_sections_created)
2087 size_t bucketcount = 0;
2088 Elf_Internal_Sym isym;
2089 struct elf_assign_sym_version_info sinfo;
2091 /* Set up the version definition section. */
2092 s = bfd_get_section_by_name (dynobj, ".gnu.version_d");
2093 BFD_ASSERT (s != NULL);
2095 /* Attach all the symbols to their version information. This
2096 may cause some symbols to be unexported. */
2097 sinfo.output_bfd = output_bfd;
2099 sinfo.verdefs = verdefs;
2100 sinfo.export_dynamic = export_dynamic;
2101 sinfo.removed_dynamic = false;
2102 sinfo.failed = false;
2104 elf_link_hash_traverse (elf_hash_table (info),
2105 elf_link_assign_sym_version,
2110 /* We may have created additional version definitions if we are
2111 just linking a regular application. */
2112 verdefs = sinfo.verdefs;
2114 if (verdefs == NULL)
2118 /* Don't include this section in the output file. */
2119 for (spp = &output_bfd->sections;
2120 *spp != s->output_section;
2121 spp = &(*spp)->next)
2123 *spp = s->output_section->next;
2124 --output_bfd->section_count;
2130 struct bfd_elf_version_tree *t;
2132 Elf_Internal_Verdef def;
2133 Elf_Internal_Verdaux defaux;
2135 if (sinfo.removed_dynamic)
2137 /* Some dynamic symbols were changed to be local
2138 symbols. In this case, we renumber all of the
2139 dynamic symbols, so that we don't have a hole. If
2140 the backend changed dynsymcount, then assume that the
2141 new symbols are at the start. This is the case on
2142 the MIPS. FIXME: The names of the removed symbols
2143 will still be in the dynamic string table, wasting
2145 elf_hash_table (info)->dynsymcount =
2146 1 + (elf_hash_table (info)->dynsymcount - old_dynsymcount);
2147 elf_link_hash_traverse (elf_hash_table (info),
2148 elf_link_renumber_dynsyms,
2155 /* Make space for the base version. */
2156 size += sizeof (Elf_External_Verdef);
2157 size += sizeof (Elf_External_Verdaux);
2160 for (t = verdefs; t != NULL; t = t->next)
2162 struct bfd_elf_version_deps *n;
2164 size += sizeof (Elf_External_Verdef);
2165 size += sizeof (Elf_External_Verdaux);
2168 for (n = t->deps; n != NULL; n = n->next)
2169 size += sizeof (Elf_External_Verdaux);
2172 s->_raw_size = size;
2173 s->contents = (bfd_byte *) bfd_alloc (output_bfd, s->_raw_size);
2174 if (s->contents == NULL && s->_raw_size != 0)
2177 /* Fill in the version definition section. */
2181 def.vd_version = VER_DEF_CURRENT;
2182 def.vd_flags = VER_FLG_BASE;
2185 def.vd_aux = sizeof (Elf_External_Verdef);
2186 def.vd_next = (sizeof (Elf_External_Verdef)
2187 + sizeof (Elf_External_Verdaux));
2189 if (soname_indx != -1)
2191 def.vd_hash = bfd_elf_hash ((const unsigned char *) soname);
2192 defaux.vda_name = soname_indx;
2199 name = output_bfd->filename;
2200 def.vd_hash = bfd_elf_hash ((const unsigned char *) name);
2201 indx = _bfd_stringtab_add (elf_hash_table (info)->dynstr,
2203 if (indx == (bfd_size_type) -1)
2205 defaux.vda_name = indx;
2207 defaux.vda_next = 0;
2209 _bfd_elf_swap_verdef_out (output_bfd, &def,
2210 (Elf_External_Verdef *)p);
2211 p += sizeof (Elf_External_Verdef);
2212 _bfd_elf_swap_verdaux_out (output_bfd, &defaux,
2213 (Elf_External_Verdaux *) p);
2214 p += sizeof (Elf_External_Verdaux);
2216 for (t = verdefs; t != NULL; t = t->next)
2219 struct bfd_elf_version_deps *n;
2220 struct elf_link_hash_entry *h;
2223 for (n = t->deps; n != NULL; n = n->next)
2226 /* Add a symbol representing this version. */
2228 if (! (_bfd_generic_link_add_one_symbol
2229 (info, dynobj, t->name, BSF_GLOBAL, bfd_abs_section_ptr,
2230 (bfd_vma) 0, (const char *) NULL, false,
2231 get_elf_backend_data (dynobj)->collect,
2232 (struct bfd_link_hash_entry **) &h)))
2234 h->elf_link_hash_flags &= ~ ELF_LINK_NON_ELF;
2235 h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
2236 h->type = STT_OBJECT;
2237 h->verinfo.vertree = t;
2239 if (! _bfd_elf_link_record_dynamic_symbol (info, h))
2242 def.vd_version = VER_DEF_CURRENT;
2244 if (t->globals == NULL && t->locals == NULL && ! t->used)
2245 def.vd_flags |= VER_FLG_WEAK;
2246 def.vd_ndx = t->vernum + 1;
2247 def.vd_cnt = cdeps + 1;
2248 def.vd_hash = bfd_elf_hash ((const unsigned char *) t->name);
2249 def.vd_aux = sizeof (Elf_External_Verdef);
2250 if (t->next != NULL)
2251 def.vd_next = (sizeof (Elf_External_Verdef)
2252 + (cdeps + 1) * sizeof (Elf_External_Verdaux));
2256 _bfd_elf_swap_verdef_out (output_bfd, &def,
2257 (Elf_External_Verdef *) p);
2258 p += sizeof (Elf_External_Verdef);
2260 defaux.vda_name = h->dynstr_index;
2261 if (t->deps == NULL)
2262 defaux.vda_next = 0;
2264 defaux.vda_next = sizeof (Elf_External_Verdaux);
2265 t->name_indx = defaux.vda_name;
2267 _bfd_elf_swap_verdaux_out (output_bfd, &defaux,
2268 (Elf_External_Verdaux *) p);
2269 p += sizeof (Elf_External_Verdaux);
2271 for (n = t->deps; n != NULL; n = n->next)
2273 defaux.vda_name = n->version_needed->name_indx;
2274 if (n->next == NULL)
2275 defaux.vda_next = 0;
2277 defaux.vda_next = sizeof (Elf_External_Verdaux);
2279 _bfd_elf_swap_verdaux_out (output_bfd, &defaux,
2280 (Elf_External_Verdaux *) p);
2281 p += sizeof (Elf_External_Verdaux);
2285 if (! elf_add_dynamic_entry (info, DT_VERDEF, 0)
2286 || ! elf_add_dynamic_entry (info, DT_VERDEFNUM, cdefs))
2289 elf_tdata (output_bfd)->cverdefs = cdefs;
2292 /* Work out the size of the version reference section. */
2294 s = bfd_get_section_by_name (dynobj, ".gnu.version_r");
2295 BFD_ASSERT (s != NULL);
2297 struct elf_find_verdep_info sinfo;
2299 sinfo.output_bfd = output_bfd;
2301 sinfo.vers = elf_tdata (output_bfd)->cverdefs;
2302 if (sinfo.vers == 0)
2304 sinfo.failed = false;
2306 elf_link_hash_traverse (elf_hash_table (info),
2307 elf_link_find_version_dependencies,
2310 if (elf_tdata (output_bfd)->verref == NULL)
2314 /* We don't have any version definitions, so we can just
2315 remove the section. */
2317 for (spp = &output_bfd->sections;
2318 *spp != s->output_section;
2319 spp = &(*spp)->next)
2321 *spp = s->output_section->next;
2322 --output_bfd->section_count;
2326 Elf_Internal_Verneed *t;
2331 /* Build the version definition section. */
2334 for (t = elf_tdata (output_bfd)->verref;
2338 Elf_Internal_Vernaux *a;
2340 size += sizeof (Elf_External_Verneed);
2342 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
2343 size += sizeof (Elf_External_Vernaux);
2346 s->_raw_size = size;
2347 s->contents = (bfd_byte *) bfd_alloc (output_bfd, size);
2348 if (s->contents == NULL)
2352 for (t = elf_tdata (output_bfd)->verref;
2357 Elf_Internal_Vernaux *a;
2361 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
2364 t->vn_version = VER_NEED_CURRENT;
2366 indx = _bfd_stringtab_add (elf_hash_table (info)->dynstr,
2367 t->vn_bfd->filename, true, false);
2368 if (indx == (bfd_size_type) -1)
2371 t->vn_aux = sizeof (Elf_External_Verneed);
2372 if (t->vn_nextref == NULL)
2375 t->vn_next = (sizeof (Elf_External_Verneed)
2376 + caux * sizeof (Elf_External_Vernaux));
2378 _bfd_elf_swap_verneed_out (output_bfd, t,
2379 (Elf_External_Verneed *) p);
2380 p += sizeof (Elf_External_Verneed);
2382 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
2384 a->vna_hash = bfd_elf_hash ((const unsigned char *)
2386 indx = _bfd_stringtab_add (elf_hash_table (info)->dynstr,
2387 a->vna_nodename, true, false);
2388 if (indx == (bfd_size_type) -1)
2391 if (a->vna_nextptr == NULL)
2394 a->vna_next = sizeof (Elf_External_Vernaux);
2396 _bfd_elf_swap_vernaux_out (output_bfd, a,
2397 (Elf_External_Vernaux *) p);
2398 p += sizeof (Elf_External_Vernaux);
2402 if (! elf_add_dynamic_entry (info, DT_VERNEED, 0)
2403 || ! elf_add_dynamic_entry (info, DT_VERNEEDNUM, crefs))
2406 elf_tdata (output_bfd)->cverrefs = crefs;
2410 dynsymcount = elf_hash_table (info)->dynsymcount;
2412 /* Work out the size of the symbol version section. */
2413 s = bfd_get_section_by_name (dynobj, ".gnu.version");
2414 BFD_ASSERT (s != NULL);
2415 if (dynsymcount == 0
2416 || (verdefs == NULL && elf_tdata (output_bfd)->verref == NULL))
2420 /* We don't need any symbol versions; just discard the
2422 for (spp = &output_bfd->sections;
2423 *spp != s->output_section;
2424 spp = &(*spp)->next)
2426 *spp = s->output_section->next;
2427 --output_bfd->section_count;
2431 s->_raw_size = dynsymcount * sizeof (Elf_External_Versym);
2432 s->contents = (bfd_byte *) bfd_zalloc (output_bfd, s->_raw_size);
2433 if (s->contents == NULL)
2436 if (! elf_add_dynamic_entry (info, DT_VERSYM, 0))
2440 /* Set the size of the .dynsym and .hash sections. We counted
2441 the number of dynamic symbols in elf_link_add_object_symbols.
2442 We will build the contents of .dynsym and .hash when we build
2443 the final symbol table, because until then we do not know the
2444 correct value to give the symbols. We built the .dynstr
2445 section as we went along in elf_link_add_object_symbols. */
2446 s = bfd_get_section_by_name (dynobj, ".dynsym");
2447 BFD_ASSERT (s != NULL);
2448 s->_raw_size = dynsymcount * sizeof (Elf_External_Sym);
2449 s->contents = (bfd_byte *) bfd_alloc (output_bfd, s->_raw_size);
2450 if (s->contents == NULL && s->_raw_size != 0)
2453 /* The first entry in .dynsym is a dummy symbol. */
2460 elf_swap_symbol_out (output_bfd, &isym,
2461 (PTR) (Elf_External_Sym *) s->contents);
2463 for (i = 0; elf_buckets[i] != 0; i++)
2465 bucketcount = elf_buckets[i];
2466 if (dynsymcount < elf_buckets[i + 1])
2470 s = bfd_get_section_by_name (dynobj, ".hash");
2471 BFD_ASSERT (s != NULL);
2472 s->_raw_size = (2 + bucketcount + dynsymcount) * (ARCH_SIZE / 8);
2473 s->contents = (bfd_byte *) bfd_alloc (output_bfd, s->_raw_size);
2474 if (s->contents == NULL)
2476 memset (s->contents, 0, (size_t) s->_raw_size);
2478 put_word (output_bfd, bucketcount, s->contents);
2479 put_word (output_bfd, dynsymcount, s->contents + (ARCH_SIZE / 8));
2481 elf_hash_table (info)->bucketcount = bucketcount;
2483 s = bfd_get_section_by_name (dynobj, ".dynstr");
2484 BFD_ASSERT (s != NULL);
2485 s->_raw_size = _bfd_stringtab_size (elf_hash_table (info)->dynstr);
2487 if (! elf_add_dynamic_entry (info, DT_NULL, 0))
2494 /* Make the backend pick a good value for a dynamic symbol. This is
2495 called via elf_link_hash_traverse, and also calls itself
2499 elf_adjust_dynamic_symbol (h, data)
2500 struct elf_link_hash_entry *h;
2503 struct elf_info_failed *eif = (struct elf_info_failed *) data;
2505 struct elf_backend_data *bed;
2507 /* Ignore indirect symbols. These are added by the versioning code. */
2508 if (h->root.type == bfd_link_hash_indirect)
2511 /* If this symbol was mentioned in a non-ELF file, try to set
2512 DEF_REGULAR and REF_REGULAR correctly. This is the only way to
2513 permit a non-ELF file to correctly refer to a symbol defined in
2514 an ELF dynamic object. */
2515 if ((h->elf_link_hash_flags & ELF_LINK_NON_ELF) != 0)
2517 if (h->root.type != bfd_link_hash_defined
2518 && h->root.type != bfd_link_hash_defweak)
2519 h->elf_link_hash_flags |= ELF_LINK_HASH_REF_REGULAR;
2522 if (h->root.u.def.section->owner != NULL
2523 && (bfd_get_flavour (h->root.u.def.section->owner)
2524 == bfd_target_elf_flavour))
2525 h->elf_link_hash_flags |= ELF_LINK_HASH_REF_REGULAR;
2527 h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
2530 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
2531 || (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0)
2533 if (! _bfd_elf_link_record_dynamic_symbol (eif->info, h))
2541 /* If this is a final link, and the symbol was defined as a common
2542 symbol in a regular object file, and there was no definition in
2543 any dynamic object, then the linker will have allocated space for
2544 the symbol in a common section but the ELF_LINK_HASH_DEF_REGULAR
2545 flag will not have been set. */
2546 if (h->root.type == bfd_link_hash_defined
2547 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
2548 && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) != 0
2549 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0
2550 && (h->root.u.def.section->owner->flags & DYNAMIC) == 0)
2551 h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
2553 /* If -Bsymbolic was used (which means to bind references to global
2554 symbols to the definition within the shared object), and this
2555 symbol was defined in a regular object, then it actually doesn't
2556 need a PLT entry. */
2557 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0
2558 && eif->info->shared
2559 && eif->info->symbolic
2560 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0)
2561 h->elf_link_hash_flags &=~ ELF_LINK_HASH_NEEDS_PLT;
2563 /* If this symbol does not require a PLT entry, and it is not
2564 defined by a dynamic object, or is not referenced by a regular
2565 object, ignore it. We do have to handle a weak defined symbol,
2566 even if no regular object refers to it, if we decided to add it
2567 to the dynamic symbol table. FIXME: Do we normally need to worry
2568 about symbols which are defined by one dynamic object and
2569 referenced by another one? */
2570 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) == 0
2571 && ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0
2572 || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0
2573 || ((h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0
2574 && (h->weakdef == NULL || h->weakdef->dynindx == -1))))
2577 /* If we've already adjusted this symbol, don't do it again. This
2578 can happen via a recursive call. */
2579 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DYNAMIC_ADJUSTED) != 0)
2582 /* Don't look at this symbol again. Note that we must set this
2583 after checking the above conditions, because we may look at a
2584 symbol once, decide not to do anything, and then get called
2585 recursively later after REF_REGULAR is set below. */
2586 h->elf_link_hash_flags |= ELF_LINK_HASH_DYNAMIC_ADJUSTED;
2588 /* If this is a weak definition, and we know a real definition, and
2589 the real symbol is not itself defined by a regular object file,
2590 then get a good value for the real definition. We handle the
2591 real symbol first, for the convenience of the backend routine.
2593 Note that there is a confusing case here. If the real definition
2594 is defined by a regular object file, we don't get the real symbol
2595 from the dynamic object, but we do get the weak symbol. If the
2596 processor backend uses a COPY reloc, then if some routine in the
2597 dynamic object changes the real symbol, we will not see that
2598 change in the corresponding weak symbol. This is the way other
2599 ELF linkers work as well, and seems to be a result of the shared
2602 I will clarify this issue. Most SVR4 shared libraries define the
2603 variable _timezone and define timezone as a weak synonym. The
2604 tzset call changes _timezone. If you write
2605 extern int timezone;
2607 int main () { tzset (); printf ("%d %d\n", timezone, _timezone); }
2608 you might expect that, since timezone is a synonym for _timezone,
2609 the same number will print both times. However, if the processor
2610 backend uses a COPY reloc, then actually timezone will be copied
2611 into your process image, and, since you define _timezone
2612 yourself, _timezone will not. Thus timezone and _timezone will
2613 wind up at different memory locations. The tzset call will set
2614 _timezone, leaving timezone unchanged. */
2616 if (h->weakdef != NULL)
2618 struct elf_link_hash_entry *weakdef;
2620 BFD_ASSERT (h->root.type == bfd_link_hash_defined
2621 || h->root.type == bfd_link_hash_defweak);
2622 weakdef = h->weakdef;
2623 BFD_ASSERT (weakdef->root.type == bfd_link_hash_defined
2624 || weakdef->root.type == bfd_link_hash_defweak);
2625 BFD_ASSERT (weakdef->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC);
2626 if ((weakdef->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0)
2628 /* This symbol is defined by a regular object file, so we
2629 will not do anything special. Clear weakdef for the
2630 convenience of the processor backend. */
2635 /* There is an implicit reference by a regular object file
2636 via the weak symbol. */
2637 weakdef->elf_link_hash_flags |= ELF_LINK_HASH_REF_REGULAR;
2638 if (! elf_adjust_dynamic_symbol (weakdef, (PTR) eif))
2643 dynobj = elf_hash_table (eif->info)->dynobj;
2644 bed = get_elf_backend_data (dynobj);
2645 if (! (*bed->elf_backend_adjust_dynamic_symbol) (eif->info, h))
2654 /* This routine is used to export all defined symbols into the dynamic
2655 symbol table. It is called via elf_link_hash_traverse. */
2658 elf_export_symbol (h, data)
2659 struct elf_link_hash_entry *h;
2662 struct elf_info_failed *eif = (struct elf_info_failed *) data;
2664 /* Ignore indirect symbols. These are added by the versioning code. */
2665 if (h->root.type == bfd_link_hash_indirect)
2668 if (h->dynindx == -1
2669 && (h->elf_link_hash_flags
2670 & (ELF_LINK_HASH_DEF_REGULAR | ELF_LINK_HASH_REF_REGULAR)) != 0)
2672 if (! _bfd_elf_link_record_dynamic_symbol (eif->info, h))
2682 /* Look through the symbols which are defined in other shared
2683 libraries and referenced here. Update the list of version
2684 dependencies. This will be put into the .gnu.version_r section.
2685 This function is called via elf_link_hash_traverse. */
2688 elf_link_find_version_dependencies (h, data)
2689 struct elf_link_hash_entry *h;
2692 struct elf_find_verdep_info *rinfo = (struct elf_find_verdep_info *) data;
2693 Elf_Internal_Verneed *t;
2694 Elf_Internal_Vernaux *a;
2696 /* We only care about symbols defined in shared objects with version
2698 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0
2699 || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0
2701 || h->verinfo.verdef == NULL)
2704 /* See if we already know about this version. */
2705 for (t = elf_tdata (rinfo->output_bfd)->verref; t != NULL; t = t->vn_nextref)
2707 if (t->vn_bfd == h->verinfo.verdef->vd_bfd)
2710 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
2711 if (a->vna_nodename == h->verinfo.verdef->vd_nodename)
2717 /* This is a new version. Add it to tree we are building. */
2721 t = (Elf_Internal_Verneed *) bfd_zalloc (rinfo->output_bfd, sizeof *t);
2724 rinfo->failed = true;
2728 t->vn_bfd = h->verinfo.verdef->vd_bfd;
2729 t->vn_nextref = elf_tdata (rinfo->output_bfd)->verref;
2730 elf_tdata (rinfo->output_bfd)->verref = t;
2733 a = (Elf_Internal_Vernaux *) bfd_zalloc (rinfo->output_bfd, sizeof *a);
2735 /* Note that we are copying a string pointer here, and testing it
2736 above. If bfd_elf_string_from_elf_section is ever changed to
2737 discard the string data when low in memory, this will have to be
2739 a->vna_nodename = h->verinfo.verdef->vd_nodename;
2741 a->vna_flags = h->verinfo.verdef->vd_flags;
2742 a->vna_nextptr = t->vn_auxptr;
2744 h->verinfo.verdef->vd_exp_refno = rinfo->vers;
2747 a->vna_other = h->verinfo.verdef->vd_exp_refno + 1;
2754 /* Figure out appropriate versions for all the symbols. We may not
2755 have the version number script until we have read all of the input
2756 files, so until that point we don't know which symbols should be
2757 local. This function is called via elf_link_hash_traverse. */
2760 elf_link_assign_sym_version (h, data)
2761 struct elf_link_hash_entry *h;
2764 struct elf_assign_sym_version_info *sinfo =
2765 (struct elf_assign_sym_version_info *) data;
2766 struct bfd_link_info *info = sinfo->info;
2769 /* We only need version numbers for symbols defined in regular
2771 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
2774 p = strchr (h->root.root.string, ELF_VER_CHR);
2775 if (p != NULL && h->verinfo.vertree == NULL)
2777 struct bfd_elf_version_tree *t;
2782 /* There are two consecutive ELF_VER_CHR characters if this is
2783 not a hidden symbol. */
2785 if (*p == ELF_VER_CHR)
2791 /* If there is no version string, we can just return out. */
2795 h->elf_link_hash_flags |= ELF_LINK_HIDDEN;
2799 /* Look for the version. If we find it, it is no longer weak. */
2800 for (t = sinfo->verdefs; t != NULL; t = t->next)
2802 if (strcmp (t->name, p) == 0)
2804 h->verinfo.vertree = t;
2807 /* See if there is anything to force this symbol to
2809 if (t->locals != NULL)
2813 struct bfd_elf_version_expr *d;
2815 len = p - h->root.root.string;
2816 alc = bfd_alloc (sinfo->output_bfd, len);
2819 strncpy (alc, h->root.root.string, len - 1);
2820 alc[len - 1] = '\0';
2821 if (alc[len - 2] == ELF_VER_CHR)
2822 alc[len - 2] = '\0';
2824 for (d = t->locals; d != NULL; d = d->next)
2826 if ((d->match[0] == '*' && d->match[1] == '\0')
2827 || fnmatch (d->match, alc, 0) == 0)
2829 if (h->dynindx != -1
2831 && ! sinfo->export_dynamic
2832 && (h->elf_link_hash_flags
2833 & ELF_LINK_HASH_NEEDS_PLT) == 0)
2835 sinfo->removed_dynamic = true;
2836 h->elf_link_hash_flags |= ELF_LINK_FORCED_LOCAL;
2838 /* FIXME: The name of the symbol has
2839 already been recorded in the dynamic
2840 string table section. */
2847 bfd_release (sinfo->output_bfd, alc);
2854 /* If we are building an application, we need to create a
2855 version node for this version. */
2856 if (t == NULL && ! info->shared)
2858 struct bfd_elf_version_tree **pp;
2861 /* If we aren't going to export this symbol, we don't need
2862 to worry about it. */
2863 if (h->dynindx == -1)
2866 t = ((struct bfd_elf_version_tree *)
2867 bfd_alloc (sinfo->output_bfd, sizeof *t));
2870 sinfo->failed = true;
2879 t->name_indx = (unsigned int) -1;
2883 for (pp = &sinfo->verdefs; *pp != NULL; pp = &(*pp)->next)
2885 t->vernum = version_index;
2889 h->verinfo.vertree = t;
2893 /* We could not find the version for a symbol when
2894 generating a shared archive. Return an error. */
2895 (*_bfd_error_handler)
2896 ("%s: undefined version name %s",
2897 bfd_get_filename (sinfo->output_bfd), h->root.root.string);
2898 bfd_set_error (bfd_error_bad_value);
2899 sinfo->failed = true;
2904 h->elf_link_hash_flags |= ELF_LINK_HIDDEN;
2907 /* If we don't have a version for this symbol, see if we can find
2909 if (h->verinfo.vertree == NULL && sinfo->verdefs != NULL)
2911 struct bfd_elf_version_tree *t;
2912 struct bfd_elf_version_tree *deflt;
2913 struct bfd_elf_version_expr *d;
2915 /* See if can find what version this symbol is in. If the
2916 symbol is supposed to eb local, then don't actually register
2919 for (t = sinfo->verdefs; t != NULL; t = t->next)
2921 if (t->globals != NULL)
2923 for (d = t->globals; d != NULL; d = d->next)
2925 if (fnmatch (d->match, h->root.root.string, 0) == 0)
2927 h->verinfo.vertree = t;
2936 if (t->locals != NULL)
2938 for (d = t->locals; d != NULL; d = d->next)
2940 if (d->match[0] == '*' && d->match[1] == '\0')
2942 else if (fnmatch (d->match, h->root.root.string, 0) == 0)
2944 h->verinfo.vertree = t;
2945 if (h->dynindx != -1
2947 && ! sinfo->export_dynamic
2948 && (h->elf_link_hash_flags
2949 & ELF_LINK_HASH_NEEDS_PLT) == 0)
2951 sinfo->removed_dynamic = true;
2952 h->elf_link_hash_flags |= ELF_LINK_FORCED_LOCAL;
2954 /* FIXME: The name of the symbol has already
2955 been recorded in the dynamic string table
2967 if (deflt != NULL && h->verinfo.vertree == NULL)
2969 h->verinfo.vertree = deflt;
2970 if (h->dynindx != -1
2972 && ! sinfo->export_dynamic
2973 && (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) == 0)
2975 sinfo->removed_dynamic = true;
2976 h->elf_link_hash_flags |= ELF_LINK_FORCED_LOCAL;
2978 /* FIXME: The name of the symbol has already been
2979 recorded in the dynamic string table section. */
2987 /* This function is used to renumber the dynamic symbols, if some of
2988 them are removed because they are marked as local. This is called
2989 via elf_link_hash_traverse. */
2992 elf_link_renumber_dynsyms (h, data)
2993 struct elf_link_hash_entry *h;
2996 struct bfd_link_info *info = (struct bfd_link_info *) data;
2998 if (h->dynindx != -1)
3000 h->dynindx = elf_hash_table (info)->dynsymcount;
3001 ++elf_hash_table (info)->dynsymcount;
3007 /* Final phase of ELF linker. */
3009 /* A structure we use to avoid passing large numbers of arguments. */
3011 struct elf_final_link_info
3013 /* General link information. */
3014 struct bfd_link_info *info;
3017 /* Symbol string table. */
3018 struct bfd_strtab_hash *symstrtab;
3019 /* .dynsym section. */
3020 asection *dynsym_sec;
3021 /* .hash section. */
3023 /* symbol version section (.gnu.version). */
3024 asection *symver_sec;
3025 /* Buffer large enough to hold contents of any section. */
3027 /* Buffer large enough to hold external relocs of any section. */
3028 PTR external_relocs;
3029 /* Buffer large enough to hold internal relocs of any section. */
3030 Elf_Internal_Rela *internal_relocs;
3031 /* Buffer large enough to hold external local symbols of any input
3033 Elf_External_Sym *external_syms;
3034 /* Buffer large enough to hold internal local symbols of any input
3036 Elf_Internal_Sym *internal_syms;
3037 /* Array large enough to hold a symbol index for each local symbol
3038 of any input BFD. */
3040 /* Array large enough to hold a section pointer for each local
3041 symbol of any input BFD. */
3042 asection **sections;
3043 /* Buffer to hold swapped out symbols. */
3044 Elf_External_Sym *symbuf;
3045 /* Number of swapped out symbols in buffer. */
3046 size_t symbuf_count;
3047 /* Number of symbols which fit in symbuf. */
3051 static boolean elf_link_output_sym
3052 PARAMS ((struct elf_final_link_info *, const char *,
3053 Elf_Internal_Sym *, asection *));
3054 static boolean elf_link_flush_output_syms
3055 PARAMS ((struct elf_final_link_info *));
3056 static boolean elf_link_output_extsym
3057 PARAMS ((struct elf_link_hash_entry *, PTR));
3058 static boolean elf_link_input_bfd
3059 PARAMS ((struct elf_final_link_info *, bfd *));
3060 static boolean elf_reloc_link_order
3061 PARAMS ((bfd *, struct bfd_link_info *, asection *,
3062 struct bfd_link_order *));
3064 /* This struct is used to pass information to elf_link_output_extsym. */
3066 struct elf_outext_info
3070 struct elf_final_link_info *finfo;
3073 /* Do the final step of an ELF link. */
3076 elf_bfd_final_link (abfd, info)
3078 struct bfd_link_info *info;
3082 struct elf_final_link_info finfo;
3083 register asection *o;
3084 register struct bfd_link_order *p;
3086 size_t max_contents_size;
3087 size_t max_external_reloc_size;
3088 size_t max_internal_reloc_count;
3089 size_t max_sym_count;
3091 Elf_Internal_Sym elfsym;
3093 Elf_Internal_Shdr *symtab_hdr;
3094 Elf_Internal_Shdr *symstrtab_hdr;
3095 struct elf_backend_data *bed = get_elf_backend_data (abfd);
3096 struct elf_outext_info eoinfo;
3099 abfd->flags |= DYNAMIC;
3101 dynamic = elf_hash_table (info)->dynamic_sections_created;
3102 dynobj = elf_hash_table (info)->dynobj;
3105 finfo.output_bfd = abfd;
3106 finfo.symstrtab = elf_stringtab_init ();
3107 if (finfo.symstrtab == NULL)
3112 finfo.dynsym_sec = NULL;
3113 finfo.hash_sec = NULL;
3114 finfo.symver_sec = NULL;
3118 finfo.dynsym_sec = bfd_get_section_by_name (dynobj, ".dynsym");
3119 finfo.hash_sec = bfd_get_section_by_name (dynobj, ".hash");
3120 BFD_ASSERT (finfo.dynsym_sec != NULL && finfo.hash_sec != NULL);
3121 finfo.symver_sec = bfd_get_section_by_name (dynobj, ".gnu.version");
3122 /* Note that it is OK if symver_sec is NULL. */
3125 finfo.contents = NULL;
3126 finfo.external_relocs = NULL;
3127 finfo.internal_relocs = NULL;
3128 finfo.external_syms = NULL;
3129 finfo.internal_syms = NULL;
3130 finfo.indices = NULL;
3131 finfo.sections = NULL;
3132 finfo.symbuf = NULL;
3133 finfo.symbuf_count = 0;
3135 /* Count up the number of relocations we will output for each output
3136 section, so that we know the sizes of the reloc sections. We
3137 also figure out some maximum sizes. */
3138 max_contents_size = 0;
3139 max_external_reloc_size = 0;
3140 max_internal_reloc_count = 0;
3142 for (o = abfd->sections; o != (asection *) NULL; o = o->next)
3146 for (p = o->link_order_head; p != NULL; p = p->next)
3148 if (p->type == bfd_section_reloc_link_order
3149 || p->type == bfd_symbol_reloc_link_order)
3151 else if (p->type == bfd_indirect_link_order)
3155 sec = p->u.indirect.section;
3157 /* Mark all sections which are to be included in the
3158 link. This will normally be every section. We need
3159 to do this so that we can identify any sections which
3160 the linker has decided to not include. */
3161 sec->linker_mark = true;
3163 if (info->relocateable)
3164 o->reloc_count += sec->reloc_count;
3166 if (sec->_raw_size > max_contents_size)
3167 max_contents_size = sec->_raw_size;
3168 if (sec->_cooked_size > max_contents_size)
3169 max_contents_size = sec->_cooked_size;
3171 /* We are interested in just local symbols, not all
3173 if (bfd_get_flavour (sec->owner) == bfd_target_elf_flavour
3174 && (sec->owner->flags & DYNAMIC) == 0)
3178 if (elf_bad_symtab (sec->owner))
3179 sym_count = (elf_tdata (sec->owner)->symtab_hdr.sh_size
3180 / sizeof (Elf_External_Sym));
3182 sym_count = elf_tdata (sec->owner)->symtab_hdr.sh_info;
3184 if (sym_count > max_sym_count)
3185 max_sym_count = sym_count;
3187 if ((sec->flags & SEC_RELOC) != 0)
3191 ext_size = elf_section_data (sec)->rel_hdr.sh_size;
3192 if (ext_size > max_external_reloc_size)
3193 max_external_reloc_size = ext_size;
3194 if (sec->reloc_count > max_internal_reloc_count)
3195 max_internal_reloc_count = sec->reloc_count;
3201 if (o->reloc_count > 0)
3202 o->flags |= SEC_RELOC;
3205 /* Explicitly clear the SEC_RELOC flag. The linker tends to
3206 set it (this is probably a bug) and if it is set
3207 assign_section_numbers will create a reloc section. */
3208 o->flags &=~ SEC_RELOC;
3211 /* If the SEC_ALLOC flag is not set, force the section VMA to
3212 zero. This is done in elf_fake_sections as well, but forcing
3213 the VMA to 0 here will ensure that relocs against these
3214 sections are handled correctly. */
3215 if ((o->flags & SEC_ALLOC) == 0
3216 && ! o->user_set_vma)
3220 /* Figure out the file positions for everything but the symbol table
3221 and the relocs. We set symcount to force assign_section_numbers
3222 to create a symbol table. */
3223 abfd->symcount = info->strip == strip_all ? 0 : 1;
3224 BFD_ASSERT (! abfd->output_has_begun);
3225 if (! _bfd_elf_compute_section_file_positions (abfd, info))
3228 /* That created the reloc sections. Set their sizes, and assign
3229 them file positions, and allocate some buffers. */
3230 for (o = abfd->sections; o != NULL; o = o->next)
3232 if ((o->flags & SEC_RELOC) != 0)
3234 Elf_Internal_Shdr *rel_hdr;
3235 register struct elf_link_hash_entry **p, **pend;
3237 rel_hdr = &elf_section_data (o)->rel_hdr;
3239 rel_hdr->sh_size = rel_hdr->sh_entsize * o->reloc_count;
3241 /* The contents field must last into write_object_contents,
3242 so we allocate it with bfd_alloc rather than malloc. */
3243 rel_hdr->contents = (PTR) bfd_alloc (abfd, rel_hdr->sh_size);
3244 if (rel_hdr->contents == NULL && rel_hdr->sh_size != 0)
3247 p = ((struct elf_link_hash_entry **)
3248 bfd_malloc (o->reloc_count
3249 * sizeof (struct elf_link_hash_entry *)));
3250 if (p == NULL && o->reloc_count != 0)
3252 elf_section_data (o)->rel_hashes = p;
3253 pend = p + o->reloc_count;
3254 for (; p < pend; p++)
3257 /* Use the reloc_count field as an index when outputting the
3263 _bfd_elf_assign_file_positions_for_relocs (abfd);
3265 /* We have now assigned file positions for all the sections except
3266 .symtab and .strtab. We start the .symtab section at the current
3267 file position, and write directly to it. We build the .strtab
3268 section in memory. */
3270 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3271 /* sh_name is set in prep_headers. */
3272 symtab_hdr->sh_type = SHT_SYMTAB;
3273 symtab_hdr->sh_flags = 0;
3274 symtab_hdr->sh_addr = 0;
3275 symtab_hdr->sh_size = 0;
3276 symtab_hdr->sh_entsize = sizeof (Elf_External_Sym);
3277 /* sh_link is set in assign_section_numbers. */
3278 /* sh_info is set below. */
3279 /* sh_offset is set just below. */
3280 symtab_hdr->sh_addralign = 4; /* FIXME: system dependent? */
3282 off = elf_tdata (abfd)->next_file_pos;
3283 off = _bfd_elf_assign_file_position_for_section (symtab_hdr, off, true);
3285 /* Note that at this point elf_tdata (abfd)->next_file_pos is
3286 incorrect. We do not yet know the size of the .symtab section.
3287 We correct next_file_pos below, after we do know the size. */
3289 /* Allocate a buffer to hold swapped out symbols. This is to avoid
3290 continuously seeking to the right position in the file. */
3291 if (! info->keep_memory || max_sym_count < 20)
3292 finfo.symbuf_size = 20;
3294 finfo.symbuf_size = max_sym_count;
3295 finfo.symbuf = ((Elf_External_Sym *)
3296 bfd_malloc (finfo.symbuf_size * sizeof (Elf_External_Sym)));
3297 if (finfo.symbuf == NULL)
3300 /* Start writing out the symbol table. The first symbol is always a
3302 if (info->strip != strip_all || info->relocateable)
3304 elfsym.st_value = 0;
3307 elfsym.st_other = 0;
3308 elfsym.st_shndx = SHN_UNDEF;
3309 if (! elf_link_output_sym (&finfo, (const char *) NULL,
3310 &elfsym, bfd_und_section_ptr))
3315 /* Some standard ELF linkers do this, but we don't because it causes
3316 bootstrap comparison failures. */
3317 /* Output a file symbol for the output file as the second symbol.
3318 We output this even if we are discarding local symbols, although
3319 I'm not sure if this is correct. */
3320 elfsym.st_value = 0;
3322 elfsym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE);
3323 elfsym.st_other = 0;
3324 elfsym.st_shndx = SHN_ABS;
3325 if (! elf_link_output_sym (&finfo, bfd_get_filename (abfd),
3326 &elfsym, bfd_abs_section_ptr))
3330 /* Output a symbol for each section. We output these even if we are
3331 discarding local symbols, since they are used for relocs. These
3332 symbols have no names. We store the index of each one in the
3333 index field of the section, so that we can find it again when
3334 outputting relocs. */
3335 if (info->strip != strip_all || info->relocateable)
3338 elfsym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
3339 elfsym.st_other = 0;
3340 for (i = 1; i < elf_elfheader (abfd)->e_shnum; i++)
3342 o = section_from_elf_index (abfd, i);
3344 o->target_index = abfd->symcount;
3345 elfsym.st_shndx = i;
3346 if (info->relocateable || o == NULL)
3347 elfsym.st_value = 0;
3349 elfsym.st_value = o->vma;
3350 if (! elf_link_output_sym (&finfo, (const char *) NULL,
3356 /* Allocate some memory to hold information read in from the input
3358 finfo.contents = (bfd_byte *) bfd_malloc (max_contents_size);
3359 finfo.external_relocs = (PTR) bfd_malloc (max_external_reloc_size);
3360 finfo.internal_relocs = ((Elf_Internal_Rela *)
3361 bfd_malloc (max_internal_reloc_count
3362 * sizeof (Elf_Internal_Rela)));
3363 finfo.external_syms = ((Elf_External_Sym *)
3364 bfd_malloc (max_sym_count
3365 * sizeof (Elf_External_Sym)));
3366 finfo.internal_syms = ((Elf_Internal_Sym *)
3367 bfd_malloc (max_sym_count
3368 * sizeof (Elf_Internal_Sym)));
3369 finfo.indices = (long *) bfd_malloc (max_sym_count * sizeof (long));
3370 finfo.sections = ((asection **)
3371 bfd_malloc (max_sym_count * sizeof (asection *)));
3372 if ((finfo.contents == NULL && max_contents_size != 0)
3373 || (finfo.external_relocs == NULL && max_external_reloc_size != 0)
3374 || (finfo.internal_relocs == NULL && max_internal_reloc_count != 0)
3375 || (finfo.external_syms == NULL && max_sym_count != 0)
3376 || (finfo.internal_syms == NULL && max_sym_count != 0)
3377 || (finfo.indices == NULL && max_sym_count != 0)
3378 || (finfo.sections == NULL && max_sym_count != 0))
3381 /* Since ELF permits relocations to be against local symbols, we
3382 must have the local symbols available when we do the relocations.
3383 Since we would rather only read the local symbols once, and we
3384 would rather not keep them in memory, we handle all the
3385 relocations for a single input file at the same time.
3387 Unfortunately, there is no way to know the total number of local
3388 symbols until we have seen all of them, and the local symbol
3389 indices precede the global symbol indices. This means that when
3390 we are generating relocateable output, and we see a reloc against
3391 a global symbol, we can not know the symbol index until we have
3392 finished examining all the local symbols to see which ones we are
3393 going to output. To deal with this, we keep the relocations in
3394 memory, and don't output them until the end of the link. This is
3395 an unfortunate waste of memory, but I don't see a good way around
3396 it. Fortunately, it only happens when performing a relocateable
3397 link, which is not the common case. FIXME: If keep_memory is set
3398 we could write the relocs out and then read them again; I don't
3399 know how bad the memory loss will be. */
3401 for (sub = info->input_bfds; sub != NULL; sub = sub->next)
3402 sub->output_has_begun = false;
3403 for (o = abfd->sections; o != NULL; o = o->next)
3405 for (p = o->link_order_head; p != NULL; p = p->next)
3407 if (p->type == bfd_indirect_link_order
3408 && (bfd_get_flavour (p->u.indirect.section->owner)
3409 == bfd_target_elf_flavour))
3411 sub = p->u.indirect.section->owner;
3412 if (! sub->output_has_begun)
3414 if (! elf_link_input_bfd (&finfo, sub))
3416 sub->output_has_begun = true;
3419 else if (p->type == bfd_section_reloc_link_order
3420 || p->type == bfd_symbol_reloc_link_order)
3422 if (! elf_reloc_link_order (abfd, info, o, p))
3427 if (! _bfd_default_link_order (abfd, info, o, p))
3433 /* That wrote out all the local symbols. Finish up the symbol table
3434 with the global symbols. */
3436 if (info->strip != strip_all && info->shared)
3438 /* Output any global symbols that got converted to local in a
3439 version script. We do this in a separate step since ELF
3440 requires all local symbols to appear prior to any global
3441 symbols. FIXME: We should only do this if some global
3442 symbols were, in fact, converted to become local. FIXME:
3443 Will this work correctly with the Irix 5 linker? */
3444 eoinfo.failed = false;
3445 eoinfo.finfo = &finfo;
3446 eoinfo.localsyms = true;
3447 elf_link_hash_traverse (elf_hash_table (info), elf_link_output_extsym,
3453 /* The sh_info field records the index of the first non local
3455 symtab_hdr->sh_info = abfd->symcount;
3457 elf_section_data (finfo.dynsym_sec->output_section)->this_hdr.sh_info = 1;
3459 /* We get the global symbols from the hash table. */
3460 eoinfo.failed = false;
3461 eoinfo.localsyms = false;
3462 eoinfo.finfo = &finfo;
3463 elf_link_hash_traverse (elf_hash_table (info), elf_link_output_extsym,
3468 /* Flush all symbols to the file. */
3469 if (! elf_link_flush_output_syms (&finfo))
3472 /* Now we know the size of the symtab section. */
3473 off += symtab_hdr->sh_size;
3475 /* Finish up and write out the symbol string table (.strtab)
3477 symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr;
3478 /* sh_name was set in prep_headers. */
3479 symstrtab_hdr->sh_type = SHT_STRTAB;
3480 symstrtab_hdr->sh_flags = 0;
3481 symstrtab_hdr->sh_addr = 0;
3482 symstrtab_hdr->sh_size = _bfd_stringtab_size (finfo.symstrtab);
3483 symstrtab_hdr->sh_entsize = 0;
3484 symstrtab_hdr->sh_link = 0;
3485 symstrtab_hdr->sh_info = 0;
3486 /* sh_offset is set just below. */
3487 symstrtab_hdr->sh_addralign = 1;
3489 off = _bfd_elf_assign_file_position_for_section (symstrtab_hdr, off, true);
3490 elf_tdata (abfd)->next_file_pos = off;
3492 if (abfd->symcount > 0)
3494 if (bfd_seek (abfd, symstrtab_hdr->sh_offset, SEEK_SET) != 0
3495 || ! _bfd_stringtab_emit (abfd, finfo.symstrtab))
3499 /* Adjust the relocs to have the correct symbol indices. */
3500 for (o = abfd->sections; o != NULL; o = o->next)
3502 struct elf_link_hash_entry **rel_hash;
3503 Elf_Internal_Shdr *rel_hdr;
3505 if ((o->flags & SEC_RELOC) == 0)
3508 rel_hash = elf_section_data (o)->rel_hashes;
3509 rel_hdr = &elf_section_data (o)->rel_hdr;
3510 for (i = 0; i < o->reloc_count; i++, rel_hash++)
3512 if (*rel_hash == NULL)
3515 BFD_ASSERT ((*rel_hash)->indx >= 0);
3517 if (rel_hdr->sh_entsize == sizeof (Elf_External_Rel))
3519 Elf_External_Rel *erel;
3520 Elf_Internal_Rel irel;
3522 erel = (Elf_External_Rel *) rel_hdr->contents + i;
3523 elf_swap_reloc_in (abfd, erel, &irel);
3524 irel.r_info = ELF_R_INFO ((*rel_hash)->indx,
3525 ELF_R_TYPE (irel.r_info));
3526 elf_swap_reloc_out (abfd, &irel, erel);
3530 Elf_External_Rela *erela;
3531 Elf_Internal_Rela irela;
3533 BFD_ASSERT (rel_hdr->sh_entsize
3534 == sizeof (Elf_External_Rela));
3536 erela = (Elf_External_Rela *) rel_hdr->contents + i;
3537 elf_swap_reloca_in (abfd, erela, &irela);
3538 irela.r_info = ELF_R_INFO ((*rel_hash)->indx,
3539 ELF_R_TYPE (irela.r_info));
3540 elf_swap_reloca_out (abfd, &irela, erela);
3544 /* Set the reloc_count field to 0 to prevent write_relocs from
3545 trying to swap the relocs out itself. */
3549 /* If we are linking against a dynamic object, or generating a
3550 shared library, finish up the dynamic linking information. */
3553 Elf_External_Dyn *dyncon, *dynconend;
3555 /* Fix up .dynamic entries. */
3556 o = bfd_get_section_by_name (dynobj, ".dynamic");
3557 BFD_ASSERT (o != NULL);
3559 dyncon = (Elf_External_Dyn *) o->contents;
3560 dynconend = (Elf_External_Dyn *) (o->contents + o->_raw_size);
3561 for (; dyncon < dynconend; dyncon++)
3563 Elf_Internal_Dyn dyn;
3567 elf_swap_dyn_in (dynobj, dyncon, &dyn);
3574 /* SVR4 linkers seem to set DT_INIT and DT_FINI based on
3575 magic _init and _fini symbols. This is pretty ugly,
3576 but we are compatible. */
3584 struct elf_link_hash_entry *h;
3586 h = elf_link_hash_lookup (elf_hash_table (info), name,
3587 false, false, true);
3589 && (h->root.type == bfd_link_hash_defined
3590 || h->root.type == bfd_link_hash_defweak))
3592 dyn.d_un.d_val = h->root.u.def.value;
3593 o = h->root.u.def.section;
3594 if (o->output_section != NULL)
3595 dyn.d_un.d_val += (o->output_section->vma
3596 + o->output_offset);
3599 /* The symbol is imported from another shared
3600 library and does not apply to this one. */
3604 elf_swap_dyn_out (dynobj, &dyn, dyncon);
3619 name = ".gnu.version_d";
3622 name = ".gnu.version_r";
3625 name = ".gnu.version";
3627 o = bfd_get_section_by_name (abfd, name);
3628 BFD_ASSERT (o != NULL);
3629 dyn.d_un.d_ptr = o->vma;
3630 elf_swap_dyn_out (dynobj, &dyn, dyncon);
3637 if (dyn.d_tag == DT_REL || dyn.d_tag == DT_RELSZ)
3642 for (i = 1; i < elf_elfheader (abfd)->e_shnum; i++)
3644 Elf_Internal_Shdr *hdr;
3646 hdr = elf_elfsections (abfd)[i];
3647 if (hdr->sh_type == type
3648 && (hdr->sh_flags & SHF_ALLOC) != 0)
3650 if (dyn.d_tag == DT_RELSZ || dyn.d_tag == DT_RELASZ)
3651 dyn.d_un.d_val += hdr->sh_size;
3654 if (dyn.d_un.d_val == 0
3655 || hdr->sh_addr < dyn.d_un.d_val)
3656 dyn.d_un.d_val = hdr->sh_addr;
3660 elf_swap_dyn_out (dynobj, &dyn, dyncon);
3666 /* If we have created any dynamic sections, then output them. */
3669 if (! (*bed->elf_backend_finish_dynamic_sections) (abfd, info))
3672 for (o = dynobj->sections; o != NULL; o = o->next)
3674 if ((o->flags & SEC_HAS_CONTENTS) == 0
3675 || o->_raw_size == 0)
3677 if ((o->flags & SEC_LINKER_CREATED) == 0)
3679 /* At this point, we are only interested in sections
3680 created by elf_link_create_dynamic_sections. */
3683 if ((elf_section_data (o->output_section)->this_hdr.sh_type
3685 || strcmp (bfd_get_section_name (abfd, o), ".dynstr") != 0)
3687 if (! bfd_set_section_contents (abfd, o->output_section,
3688 o->contents, o->output_offset,
3696 /* The contents of the .dynstr section are actually in a
3698 off = elf_section_data (o->output_section)->this_hdr.sh_offset;
3699 if (bfd_seek (abfd, off, SEEK_SET) != 0
3700 || ! _bfd_stringtab_emit (abfd,
3701 elf_hash_table (info)->dynstr))
3707 /* If we have optimized stabs strings, output them. */
3708 if (elf_hash_table (info)->stab_info != NULL)
3710 if (! _bfd_write_stab_strings (abfd, &elf_hash_table (info)->stab_info))
3714 if (finfo.symstrtab != NULL)
3715 _bfd_stringtab_free (finfo.symstrtab);
3716 if (finfo.contents != NULL)
3717 free (finfo.contents);
3718 if (finfo.external_relocs != NULL)
3719 free (finfo.external_relocs);
3720 if (finfo.internal_relocs != NULL)
3721 free (finfo.internal_relocs);
3722 if (finfo.external_syms != NULL)
3723 free (finfo.external_syms);
3724 if (finfo.internal_syms != NULL)
3725 free (finfo.internal_syms);
3726 if (finfo.indices != NULL)
3727 free (finfo.indices);
3728 if (finfo.sections != NULL)
3729 free (finfo.sections);
3730 if (finfo.symbuf != NULL)
3731 free (finfo.symbuf);
3732 for (o = abfd->sections; o != NULL; o = o->next)
3734 if ((o->flags & SEC_RELOC) != 0
3735 && elf_section_data (o)->rel_hashes != NULL)
3736 free (elf_section_data (o)->rel_hashes);
3739 elf_tdata (abfd)->linker = true;
3744 if (finfo.symstrtab != NULL)
3745 _bfd_stringtab_free (finfo.symstrtab);
3746 if (finfo.contents != NULL)
3747 free (finfo.contents);
3748 if (finfo.external_relocs != NULL)
3749 free (finfo.external_relocs);
3750 if (finfo.internal_relocs != NULL)
3751 free (finfo.internal_relocs);
3752 if (finfo.external_syms != NULL)
3753 free (finfo.external_syms);
3754 if (finfo.internal_syms != NULL)
3755 free (finfo.internal_syms);
3756 if (finfo.indices != NULL)
3757 free (finfo.indices);
3758 if (finfo.sections != NULL)
3759 free (finfo.sections);
3760 if (finfo.symbuf != NULL)
3761 free (finfo.symbuf);
3762 for (o = abfd->sections; o != NULL; o = o->next)
3764 if ((o->flags & SEC_RELOC) != 0
3765 && elf_section_data (o)->rel_hashes != NULL)
3766 free (elf_section_data (o)->rel_hashes);
3772 /* Add a symbol to the output symbol table. */
3775 elf_link_output_sym (finfo, name, elfsym, input_sec)
3776 struct elf_final_link_info *finfo;
3778 Elf_Internal_Sym *elfsym;
3779 asection *input_sec;
3781 boolean (*output_symbol_hook) PARAMS ((bfd *,
3782 struct bfd_link_info *info,
3787 output_symbol_hook = get_elf_backend_data (finfo->output_bfd)->
3788 elf_backend_link_output_symbol_hook;
3789 if (output_symbol_hook != NULL)
3791 if (! ((*output_symbol_hook)
3792 (finfo->output_bfd, finfo->info, name, elfsym, input_sec)))
3796 if (name == (const char *) NULL || *name == '\0')
3797 elfsym->st_name = 0;
3800 elfsym->st_name = (unsigned long) _bfd_stringtab_add (finfo->symstrtab,
3803 if (elfsym->st_name == (unsigned long) -1)
3807 if (finfo->symbuf_count >= finfo->symbuf_size)
3809 if (! elf_link_flush_output_syms (finfo))
3813 elf_swap_symbol_out (finfo->output_bfd, elfsym,
3814 (PTR) (finfo->symbuf + finfo->symbuf_count));
3815 ++finfo->symbuf_count;
3817 ++finfo->output_bfd->symcount;
3822 /* Flush the output symbols to the file. */
3825 elf_link_flush_output_syms (finfo)
3826 struct elf_final_link_info *finfo;
3828 if (finfo->symbuf_count > 0)
3830 Elf_Internal_Shdr *symtab;
3832 symtab = &elf_tdata (finfo->output_bfd)->symtab_hdr;
3834 if (bfd_seek (finfo->output_bfd, symtab->sh_offset + symtab->sh_size,
3836 || (bfd_write ((PTR) finfo->symbuf, finfo->symbuf_count,
3837 sizeof (Elf_External_Sym), finfo->output_bfd)
3838 != finfo->symbuf_count * sizeof (Elf_External_Sym)))
3841 symtab->sh_size += finfo->symbuf_count * sizeof (Elf_External_Sym);
3843 finfo->symbuf_count = 0;
3849 /* Add an external symbol to the symbol table. This is called from
3850 the hash table traversal routine. When generating a shared object,
3851 we go through the symbol table twice. The first time we output
3852 anything that might have been forced to local scope in a version
3853 script. The second time we output the symbols that are still
3857 elf_link_output_extsym (h, data)
3858 struct elf_link_hash_entry *h;
3861 struct elf_outext_info *eoinfo = (struct elf_outext_info *) data;
3862 struct elf_final_link_info *finfo = eoinfo->finfo;
3864 Elf_Internal_Sym sym;
3865 asection *input_sec;
3867 /* Decide whether to output this symbol in this pass. */
3868 if (eoinfo->localsyms)
3870 if ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
3875 if ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0)
3879 /* If we are not creating a shared library, and this symbol is
3880 referenced by a shared library but is not defined anywhere, then
3881 warn that it is undefined. If we do not do this, the runtime
3882 linker will complain that the symbol is undefined when the
3883 program is run. We don't have to worry about symbols that are
3884 referenced by regular files, because we will already have issued
3885 warnings for them. */
3886 if (! finfo->info->relocateable
3887 && ! finfo->info->shared
3888 && h->root.type == bfd_link_hash_undefined
3889 && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0
3890 && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0)
3892 if (! ((*finfo->info->callbacks->undefined_symbol)
3893 (finfo->info, h->root.root.string, h->root.u.undef.abfd,
3894 (asection *) NULL, 0)))
3896 eoinfo->failed = true;
3901 /* We don't want to output symbols that have never been mentioned by
3902 a regular file, or that we have been told to strip. However, if
3903 h->indx is set to -2, the symbol is used by a reloc and we must
3907 else if (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
3908 || (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0)
3909 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
3910 && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0)
3912 else if (finfo->info->strip == strip_all
3913 || (finfo->info->strip == strip_some
3914 && bfd_hash_lookup (finfo->info->keep_hash,
3915 h->root.root.string,
3916 false, false) == NULL))
3921 /* If we're stripping it, and it's not a dynamic symbol, there's
3922 nothing else to do. */
3923 if (strip && h->dynindx == -1)
3927 sym.st_size = h->size;
3928 sym.st_other = h->other;
3929 if ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0)
3930 sym.st_info = ELF_ST_INFO (STB_LOCAL, h->type);
3931 else if (h->root.type == bfd_link_hash_undefweak
3932 || h->root.type == bfd_link_hash_defweak)
3933 sym.st_info = ELF_ST_INFO (STB_WEAK, h->type);
3935 sym.st_info = ELF_ST_INFO (STB_GLOBAL, h->type);
3937 switch (h->root.type)
3940 case bfd_link_hash_new:
3944 case bfd_link_hash_undefined:
3945 input_sec = bfd_und_section_ptr;
3946 sym.st_shndx = SHN_UNDEF;
3949 case bfd_link_hash_undefweak:
3950 input_sec = bfd_und_section_ptr;
3951 sym.st_shndx = SHN_UNDEF;
3954 case bfd_link_hash_defined:
3955 case bfd_link_hash_defweak:
3957 input_sec = h->root.u.def.section;
3958 if (input_sec->output_section != NULL)
3961 _bfd_elf_section_from_bfd_section (finfo->output_bfd,
3962 input_sec->output_section);
3963 if (sym.st_shndx == (unsigned short) -1)
3965 eoinfo->failed = true;
3969 /* ELF symbols in relocateable files are section relative,
3970 but in nonrelocateable files they are virtual
3972 sym.st_value = h->root.u.def.value + input_sec->output_offset;
3973 if (! finfo->info->relocateable)
3974 sym.st_value += input_sec->output_section->vma;
3978 BFD_ASSERT (input_sec->owner == NULL
3979 || (input_sec->owner->flags & DYNAMIC) != 0);
3980 sym.st_shndx = SHN_UNDEF;
3981 input_sec = bfd_und_section_ptr;
3986 case bfd_link_hash_common:
3987 input_sec = bfd_com_section_ptr;
3988 sym.st_shndx = SHN_COMMON;
3989 sym.st_value = 1 << h->root.u.c.p->alignment_power;
3992 case bfd_link_hash_indirect:
3993 /* These symbols are created by symbol versioning. They point
3994 to the decorated version of the name. For example, if the
3995 symbol foo@@GNU_1.2 is the default, which should be used when
3996 foo is used with no version, then we add an indirect symbol
3997 foo which points to foo@@GNU_1.2. We ignore these symbols,
3998 since the indirected symbol is already in the hash table. If
3999 the indirect symbol is non-ELF, fall through and output it. */
4000 if ((h->elf_link_hash_flags & ELF_LINK_NON_ELF) == 0)
4004 case bfd_link_hash_warning:
4005 /* We can't represent these symbols in ELF, although a warning
4006 symbol may have come from a .gnu.warning.SYMBOL section. We
4007 just put the target symbol in the hash table. If the target
4008 symbol does not really exist, don't do anything. */
4009 if (h->root.u.i.link->type == bfd_link_hash_new)
4011 return (elf_link_output_extsym
4012 ((struct elf_link_hash_entry *) h->root.u.i.link, data));
4015 /* If this symbol should be put in the .dynsym section, then put it
4016 there now. We have already know the symbol index. We also fill
4017 in the entry in the .hash section. */
4018 if (h->dynindx != -1
4019 && elf_hash_table (finfo->info)->dynamic_sections_created)
4021 struct elf_backend_data *bed;
4026 bfd_byte *bucketpos;
4029 sym.st_name = h->dynstr_index;
4031 /* Give the processor backend a chance to tweak the symbol
4032 value, and also to finish up anything that needs to be done
4034 bed = get_elf_backend_data (finfo->output_bfd);
4035 if (! ((*bed->elf_backend_finish_dynamic_symbol)
4036 (finfo->output_bfd, finfo->info, h, &sym)))
4038 eoinfo->failed = true;
4042 elf_swap_symbol_out (finfo->output_bfd, &sym,
4043 (PTR) (((Elf_External_Sym *)
4044 finfo->dynsym_sec->contents)
4047 /* We didn't include the version string in the dynamic string
4048 table, so we must not consider it in the hash table. */
4049 name = h->root.root.string;
4050 p = strchr (name, ELF_VER_CHR);
4055 copy = bfd_alloc (finfo->output_bfd, p - name + 1);
4056 strncpy (copy, name, p - name);
4057 copy[p - name] = '\0';
4061 bucketcount = elf_hash_table (finfo->info)->bucketcount;
4062 bucket = bfd_elf_hash ((const unsigned char *) name) % bucketcount;
4063 bucketpos = ((bfd_byte *) finfo->hash_sec->contents
4064 + (bucket + 2) * (ARCH_SIZE / 8));
4065 chain = get_word (finfo->output_bfd, bucketpos);
4066 put_word (finfo->output_bfd, h->dynindx, bucketpos);
4067 put_word (finfo->output_bfd, chain,
4068 ((bfd_byte *) finfo->hash_sec->contents
4069 + (bucketcount + 2 + h->dynindx) * (ARCH_SIZE / 8)));
4072 bfd_release (finfo->output_bfd, copy);
4074 if (finfo->symver_sec != NULL && finfo->symver_sec->contents != NULL)
4076 Elf_Internal_Versym iversym;
4078 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
4080 if (h->verinfo.verdef == NULL)
4081 iversym.vs_vers = 0;
4083 iversym.vs_vers = h->verinfo.verdef->vd_exp_refno + 1;
4087 if (h->verinfo.vertree == NULL)
4088 iversym.vs_vers = 1;
4090 iversym.vs_vers = h->verinfo.vertree->vernum + 1;
4093 if ((h->elf_link_hash_flags & ELF_LINK_HIDDEN) != 0)
4094 iversym.vs_vers |= VERSYM_HIDDEN;
4096 _bfd_elf_swap_versym_out (finfo->output_bfd, &iversym,
4097 (((Elf_External_Versym *)
4098 finfo->symver_sec->contents)
4103 /* If we're stripping it, then it was just a dynamic symbol, and
4104 there's nothing else to do. */
4108 h->indx = finfo->output_bfd->symcount;
4110 if (! elf_link_output_sym (finfo, h->root.root.string, &sym, input_sec))
4112 eoinfo->failed = true;
4119 /* Link an input file into the linker output file. This function
4120 handles all the sections and relocations of the input file at once.
4121 This is so that we only have to read the local symbols once, and
4122 don't have to keep them in memory. */
4125 elf_link_input_bfd (finfo, input_bfd)
4126 struct elf_final_link_info *finfo;
4129 boolean (*relocate_section) PARAMS ((bfd *, struct bfd_link_info *,
4130 bfd *, asection *, bfd_byte *,
4131 Elf_Internal_Rela *,
4132 Elf_Internal_Sym *, asection **));
4134 Elf_Internal_Shdr *symtab_hdr;
4137 Elf_External_Sym *external_syms;
4138 Elf_External_Sym *esym;
4139 Elf_External_Sym *esymend;
4140 Elf_Internal_Sym *isym;
4142 asection **ppsection;
4145 output_bfd = finfo->output_bfd;
4147 get_elf_backend_data (output_bfd)->elf_backend_relocate_section;
4149 /* If this is a dynamic object, we don't want to do anything here:
4150 we don't want the local symbols, and we don't want the section
4152 if ((input_bfd->flags & DYNAMIC) != 0)
4155 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
4156 if (elf_bad_symtab (input_bfd))
4158 locsymcount = symtab_hdr->sh_size / sizeof (Elf_External_Sym);
4163 locsymcount = symtab_hdr->sh_info;
4164 extsymoff = symtab_hdr->sh_info;
4167 /* Read the local symbols. */
4168 if (symtab_hdr->contents != NULL)
4169 external_syms = (Elf_External_Sym *) symtab_hdr->contents;
4170 else if (locsymcount == 0)
4171 external_syms = NULL;
4174 external_syms = finfo->external_syms;
4175 if (bfd_seek (input_bfd, symtab_hdr->sh_offset, SEEK_SET) != 0
4176 || (bfd_read (external_syms, sizeof (Elf_External_Sym),
4177 locsymcount, input_bfd)
4178 != locsymcount * sizeof (Elf_External_Sym)))
4182 /* Swap in the local symbols and write out the ones which we know
4183 are going into the output file. */
4184 esym = external_syms;
4185 esymend = esym + locsymcount;
4186 isym = finfo->internal_syms;
4187 pindex = finfo->indices;
4188 ppsection = finfo->sections;
4189 for (; esym < esymend; esym++, isym++, pindex++, ppsection++)
4193 Elf_Internal_Sym osym;
4195 elf_swap_symbol_in (input_bfd, esym, isym);
4198 if (elf_bad_symtab (input_bfd))
4200 if (ELF_ST_BIND (isym->st_info) != STB_LOCAL)
4207 if (isym->st_shndx == SHN_UNDEF)
4208 isec = bfd_und_section_ptr;
4209 else if (isym->st_shndx > 0 && isym->st_shndx < SHN_LORESERVE)
4210 isec = section_from_elf_index (input_bfd, isym->st_shndx);
4211 else if (isym->st_shndx == SHN_ABS)
4212 isec = bfd_abs_section_ptr;
4213 else if (isym->st_shndx == SHN_COMMON)
4214 isec = bfd_com_section_ptr;
4223 /* Don't output the first, undefined, symbol. */
4224 if (esym == external_syms)
4227 /* If we are stripping all symbols, we don't want to output this
4229 if (finfo->info->strip == strip_all)
4232 /* We never output section symbols. Instead, we use the section
4233 symbol of the corresponding section in the output file. */
4234 if (ELF_ST_TYPE (isym->st_info) == STT_SECTION)
4237 /* If we are discarding all local symbols, we don't want to
4238 output this one. If we are generating a relocateable output
4239 file, then some of the local symbols may be required by
4240 relocs; we output them below as we discover that they are
4242 if (finfo->info->discard == discard_all)
4245 /* If this symbol is defined in a section which we are
4246 discarding, we don't need to keep it, but note that
4247 linker_mark is only reliable for sections that have contents.
4248 For the benefit of the MIPS ELF linker, we check SEC_EXCLUDE
4249 as well as linker_mark. */
4250 if (isym->st_shndx > 0
4251 && isym->st_shndx < SHN_LORESERVE
4253 && ((! isec->linker_mark && (isec->flags & SEC_HAS_CONTENTS) != 0)
4254 || (! finfo->info->relocateable
4255 && (isec->flags & SEC_EXCLUDE) != 0)))
4258 /* Get the name of the symbol. */
4259 name = bfd_elf_string_from_elf_section (input_bfd, symtab_hdr->sh_link,
4264 /* See if we are discarding symbols with this name. */
4265 if ((finfo->info->strip == strip_some
4266 && (bfd_hash_lookup (finfo->info->keep_hash, name, false, false)
4268 || (finfo->info->discard == discard_l
4269 && bfd_is_local_label_name (input_bfd, name)))
4272 /* If we get here, we are going to output this symbol. */
4276 /* Adjust the section index for the output file. */
4277 osym.st_shndx = _bfd_elf_section_from_bfd_section (output_bfd,
4278 isec->output_section);
4279 if (osym.st_shndx == (unsigned short) -1)
4282 *pindex = output_bfd->symcount;
4284 /* ELF symbols in relocateable files are section relative, but
4285 in executable files they are virtual addresses. Note that
4286 this code assumes that all ELF sections have an associated
4287 BFD section with a reasonable value for output_offset; below
4288 we assume that they also have a reasonable value for
4289 output_section. Any special sections must be set up to meet
4290 these requirements. */
4291 osym.st_value += isec->output_offset;
4292 if (! finfo->info->relocateable)
4293 osym.st_value += isec->output_section->vma;
4295 if (! elf_link_output_sym (finfo, name, &osym, isec))
4299 /* Relocate the contents of each section. */
4300 for (o = input_bfd->sections; o != NULL; o = o->next)
4304 if (! o->linker_mark)
4306 /* This section was omitted from the link. */
4310 if ((o->flags & SEC_HAS_CONTENTS) == 0
4311 || (o->_raw_size == 0 && (o->flags & SEC_RELOC) == 0))
4314 if ((o->flags & SEC_LINKER_CREATED) != 0)
4316 /* Section was created by elf_link_create_dynamic_sections
4321 /* Get the contents of the section. They have been cached by a
4322 relaxation routine. Note that o is a section in an input
4323 file, so the contents field will not have been set by any of
4324 the routines which work on output files. */
4325 if (elf_section_data (o)->this_hdr.contents != NULL)
4326 contents = elf_section_data (o)->this_hdr.contents;
4329 contents = finfo->contents;
4330 if (! bfd_get_section_contents (input_bfd, o, contents,
4331 (file_ptr) 0, o->_raw_size))
4335 if ((o->flags & SEC_RELOC) != 0)
4337 Elf_Internal_Rela *internal_relocs;
4339 /* Get the swapped relocs. */
4340 internal_relocs = (NAME(_bfd_elf,link_read_relocs)
4341 (input_bfd, o, finfo->external_relocs,
4342 finfo->internal_relocs, false));
4343 if (internal_relocs == NULL
4344 && o->reloc_count > 0)
4347 /* Relocate the section by invoking a back end routine.
4349 The back end routine is responsible for adjusting the
4350 section contents as necessary, and (if using Rela relocs
4351 and generating a relocateable output file) adjusting the
4352 reloc addend as necessary.
4354 The back end routine does not have to worry about setting
4355 the reloc address or the reloc symbol index.
4357 The back end routine is given a pointer to the swapped in
4358 internal symbols, and can access the hash table entries
4359 for the external symbols via elf_sym_hashes (input_bfd).
4361 When generating relocateable output, the back end routine
4362 must handle STB_LOCAL/STT_SECTION symbols specially. The
4363 output symbol is going to be a section symbol
4364 corresponding to the output section, which will require
4365 the addend to be adjusted. */
4367 if (! (*relocate_section) (output_bfd, finfo->info,
4368 input_bfd, o, contents,
4370 finfo->internal_syms,
4374 if (finfo->info->relocateable)
4376 Elf_Internal_Rela *irela;
4377 Elf_Internal_Rela *irelaend;
4378 struct elf_link_hash_entry **rel_hash;
4379 Elf_Internal_Shdr *input_rel_hdr;
4380 Elf_Internal_Shdr *output_rel_hdr;
4382 /* Adjust the reloc addresses and symbol indices. */
4384 irela = internal_relocs;
4385 irelaend = irela + o->reloc_count;
4386 rel_hash = (elf_section_data (o->output_section)->rel_hashes
4387 + o->output_section->reloc_count);
4388 for (; irela < irelaend; irela++, rel_hash++)
4390 unsigned long r_symndx;
4391 Elf_Internal_Sym *isym;
4394 irela->r_offset += o->output_offset;
4396 r_symndx = ELF_R_SYM (irela->r_info);
4401 if (r_symndx >= locsymcount
4402 || (elf_bad_symtab (input_bfd)
4403 && finfo->sections[r_symndx] == NULL))
4407 /* This is a reloc against a global symbol. We
4408 have not yet output all the local symbols, so
4409 we do not know the symbol index of any global
4410 symbol. We set the rel_hash entry for this
4411 reloc to point to the global hash table entry
4412 for this symbol. The symbol index is then
4413 set at the end of elf_bfd_final_link. */
4414 indx = r_symndx - extsymoff;
4415 *rel_hash = elf_sym_hashes (input_bfd)[indx];
4417 /* Setting the index to -2 tells
4418 elf_link_output_extsym that this symbol is
4420 BFD_ASSERT ((*rel_hash)->indx < 0);
4421 (*rel_hash)->indx = -2;
4426 /* This is a reloc against a local symbol. */
4429 isym = finfo->internal_syms + r_symndx;
4430 sec = finfo->sections[r_symndx];
4431 if (ELF_ST_TYPE (isym->st_info) == STT_SECTION)
4433 /* I suppose the backend ought to fill in the
4434 section of any STT_SECTION symbol against a
4435 processor specific section. If we have
4436 discarded a section, the output_section will
4437 be the absolute section. */
4439 && (bfd_is_abs_section (sec)
4440 || (sec->output_section != NULL
4441 && bfd_is_abs_section (sec->output_section))))
4443 else if (sec == NULL || sec->owner == NULL)
4445 bfd_set_error (bfd_error_bad_value);
4450 r_symndx = sec->output_section->target_index;
4451 BFD_ASSERT (r_symndx != 0);
4456 if (finfo->indices[r_symndx] == -1)
4462 if (finfo->info->strip == strip_all)
4464 /* You can't do ld -r -s. */
4465 bfd_set_error (bfd_error_invalid_operation);
4469 /* This symbol was skipped earlier, but
4470 since it is needed by a reloc, we
4471 must output it now. */
4472 link = symtab_hdr->sh_link;
4473 name = bfd_elf_string_from_elf_section (input_bfd,
4479 osec = sec->output_section;
4481 _bfd_elf_section_from_bfd_section (output_bfd,
4483 if (isym->st_shndx == (unsigned short) -1)
4486 isym->st_value += sec->output_offset;
4487 if (! finfo->info->relocateable)
4488 isym->st_value += osec->vma;
4490 finfo->indices[r_symndx] = output_bfd->symcount;
4492 if (! elf_link_output_sym (finfo, name, isym, sec))
4496 r_symndx = finfo->indices[r_symndx];
4499 irela->r_info = ELF_R_INFO (r_symndx,
4500 ELF_R_TYPE (irela->r_info));
4503 /* Swap out the relocs. */
4504 input_rel_hdr = &elf_section_data (o)->rel_hdr;
4505 output_rel_hdr = &elf_section_data (o->output_section)->rel_hdr;
4506 BFD_ASSERT (output_rel_hdr->sh_entsize
4507 == input_rel_hdr->sh_entsize);
4508 irela = internal_relocs;
4509 irelaend = irela + o->reloc_count;
4510 if (input_rel_hdr->sh_entsize == sizeof (Elf_External_Rel))
4512 Elf_External_Rel *erel;
4514 erel = ((Elf_External_Rel *) output_rel_hdr->contents
4515 + o->output_section->reloc_count);
4516 for (; irela < irelaend; irela++, erel++)
4518 Elf_Internal_Rel irel;
4520 irel.r_offset = irela->r_offset;
4521 irel.r_info = irela->r_info;
4522 BFD_ASSERT (irela->r_addend == 0);
4523 elf_swap_reloc_out (output_bfd, &irel, erel);
4528 Elf_External_Rela *erela;
4530 BFD_ASSERT (input_rel_hdr->sh_entsize
4531 == sizeof (Elf_External_Rela));
4532 erela = ((Elf_External_Rela *) output_rel_hdr->contents
4533 + o->output_section->reloc_count);
4534 for (; irela < irelaend; irela++, erela++)
4535 elf_swap_reloca_out (output_bfd, irela, erela);
4538 o->output_section->reloc_count += o->reloc_count;
4542 /* Write out the modified section contents. */
4543 if (elf_section_data (o)->stab_info == NULL)
4545 if (! bfd_set_section_contents (output_bfd, o->output_section,
4546 contents, o->output_offset,
4547 (o->_cooked_size != 0
4554 if (! (_bfd_write_section_stabs
4555 (output_bfd, &elf_hash_table (finfo->info)->stab_info,
4556 o, &elf_section_data (o)->stab_info, contents)))
4564 /* Generate a reloc when linking an ELF file. This is a reloc
4565 requested by the linker, and does come from any input file. This
4566 is used to build constructor and destructor tables when linking
4570 elf_reloc_link_order (output_bfd, info, output_section, link_order)
4572 struct bfd_link_info *info;
4573 asection *output_section;
4574 struct bfd_link_order *link_order;
4576 reloc_howto_type *howto;
4580 struct elf_link_hash_entry **rel_hash_ptr;
4581 Elf_Internal_Shdr *rel_hdr;
4583 howto = bfd_reloc_type_lookup (output_bfd, link_order->u.reloc.p->reloc);
4586 bfd_set_error (bfd_error_bad_value);
4590 addend = link_order->u.reloc.p->addend;
4592 /* Figure out the symbol index. */
4593 rel_hash_ptr = (elf_section_data (output_section)->rel_hashes
4594 + output_section->reloc_count);
4595 if (link_order->type == bfd_section_reloc_link_order)
4597 indx = link_order->u.reloc.p->u.section->target_index;
4598 BFD_ASSERT (indx != 0);
4599 *rel_hash_ptr = NULL;
4603 struct elf_link_hash_entry *h;
4605 /* Treat a reloc against a defined symbol as though it were
4606 actually against the section. */
4607 h = ((struct elf_link_hash_entry *)
4608 bfd_wrapped_link_hash_lookup (output_bfd, info,
4609 link_order->u.reloc.p->u.name,
4610 false, false, true));
4612 && (h->root.type == bfd_link_hash_defined
4613 || h->root.type == bfd_link_hash_defweak))
4617 section = h->root.u.def.section;
4618 indx = section->output_section->target_index;
4619 *rel_hash_ptr = NULL;
4620 /* It seems that we ought to add the symbol value to the
4621 addend here, but in practice it has already been added
4622 because it was passed to constructor_callback. */
4623 addend += section->output_section->vma + section->output_offset;
4627 /* Setting the index to -2 tells elf_link_output_extsym that
4628 this symbol is used by a reloc. */
4635 if (! ((*info->callbacks->unattached_reloc)
4636 (info, link_order->u.reloc.p->u.name, (bfd *) NULL,
4637 (asection *) NULL, (bfd_vma) 0)))
4643 /* If this is an inplace reloc, we must write the addend into the
4645 if (howto->partial_inplace && addend != 0)
4648 bfd_reloc_status_type rstat;
4652 size = bfd_get_reloc_size (howto);
4653 buf = (bfd_byte *) bfd_zmalloc (size);
4654 if (buf == (bfd_byte *) NULL)
4656 rstat = _bfd_relocate_contents (howto, output_bfd, addend, buf);
4662 case bfd_reloc_outofrange:
4664 case bfd_reloc_overflow:
4665 if (! ((*info->callbacks->reloc_overflow)
4667 (link_order->type == bfd_section_reloc_link_order
4668 ? bfd_section_name (output_bfd,
4669 link_order->u.reloc.p->u.section)
4670 : link_order->u.reloc.p->u.name),
4671 howto->name, addend, (bfd *) NULL, (asection *) NULL,
4679 ok = bfd_set_section_contents (output_bfd, output_section, (PTR) buf,
4680 (file_ptr) link_order->offset, size);
4686 /* The address of a reloc is relative to the section in a
4687 relocateable file, and is a virtual address in an executable
4689 offset = link_order->offset;
4690 if (! info->relocateable)
4691 offset += output_section->vma;
4693 rel_hdr = &elf_section_data (output_section)->rel_hdr;
4695 if (rel_hdr->sh_type == SHT_REL)
4697 Elf_Internal_Rel irel;
4698 Elf_External_Rel *erel;
4700 irel.r_offset = offset;
4701 irel.r_info = ELF_R_INFO (indx, howto->type);
4702 erel = ((Elf_External_Rel *) rel_hdr->contents
4703 + output_section->reloc_count);
4704 elf_swap_reloc_out (output_bfd, &irel, erel);
4708 Elf_Internal_Rela irela;
4709 Elf_External_Rela *erela;
4711 irela.r_offset = offset;
4712 irela.r_info = ELF_R_INFO (indx, howto->type);
4713 irela.r_addend = addend;
4714 erela = ((Elf_External_Rela *) rel_hdr->contents
4715 + output_section->reloc_count);
4716 elf_swap_reloca_out (output_bfd, &irela, erela);
4719 ++output_section->reloc_count;
4725 /* Allocate a pointer to live in a linker created section. */
4728 elf_create_pointer_linker_section (abfd, info, lsect, h, rel)
4730 struct bfd_link_info *info;
4731 elf_linker_section_t *lsect;
4732 struct elf_link_hash_entry *h;
4733 const Elf_Internal_Rela *rel;
4735 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
4736 elf_linker_section_pointers_t *linker_section_ptr;
4737 unsigned long r_symndx = ELF_R_SYM (rel->r_info);;
4739 BFD_ASSERT (lsect != NULL);
4741 /* Is this a global symbol? */
4744 /* Has this symbol already been allocated, if so, our work is done */
4745 if (_bfd_elf_find_pointer_linker_section (h->linker_section_pointer,
4750 ptr_linker_section_ptr = &h->linker_section_pointer;
4751 /* Make sure this symbol is output as a dynamic symbol. */
4752 if (h->dynindx == -1)
4754 if (! elf_link_record_dynamic_symbol (info, h))
4758 if (lsect->rel_section)
4759 lsect->rel_section->_raw_size += sizeof (Elf_External_Rela);
4762 else /* Allocation of a pointer to a local symbol */
4764 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
4766 /* Allocate a table to hold the local symbols if first time */
4769 int num_symbols = elf_tdata (abfd)->symtab_hdr.sh_info;
4770 register unsigned int i;
4772 ptr = (elf_linker_section_pointers_t **)
4773 bfd_alloc (abfd, num_symbols * sizeof (elf_linker_section_pointers_t *));
4778 elf_local_ptr_offsets (abfd) = ptr;
4779 for (i = 0; i < num_symbols; i++)
4780 ptr[i] = (elf_linker_section_pointers_t *)0;
4783 /* Has this symbol already been allocated, if so, our work is done */
4784 if (_bfd_elf_find_pointer_linker_section (ptr[r_symndx],
4789 ptr_linker_section_ptr = &ptr[r_symndx];
4793 /* If we are generating a shared object, we need to
4794 output a R_<xxx>_RELATIVE reloc so that the
4795 dynamic linker can adjust this GOT entry. */
4796 BFD_ASSERT (lsect->rel_section != NULL);
4797 lsect->rel_section->_raw_size += sizeof (Elf_External_Rela);
4801 /* Allocate space for a pointer in the linker section, and allocate a new pointer record
4802 from internal memory. */
4803 BFD_ASSERT (ptr_linker_section_ptr != NULL);
4804 linker_section_ptr = (elf_linker_section_pointers_t *)
4805 bfd_alloc (abfd, sizeof (elf_linker_section_pointers_t));
4807 if (!linker_section_ptr)
4810 linker_section_ptr->next = *ptr_linker_section_ptr;
4811 linker_section_ptr->addend = rel->r_addend;
4812 linker_section_ptr->which = lsect->which;
4813 linker_section_ptr->written_address_p = false;
4814 *ptr_linker_section_ptr = linker_section_ptr;
4817 if (lsect->hole_size && lsect->hole_offset < lsect->max_hole_offset)
4819 linker_section_ptr->offset = lsect->section->_raw_size - lsect->hole_size + (ARCH_SIZE / 8);
4820 lsect->hole_offset += ARCH_SIZE / 8;
4821 lsect->sym_offset += ARCH_SIZE / 8;
4822 if (lsect->sym_hash) /* Bump up symbol value if needed */
4824 lsect->sym_hash->root.u.def.value += ARCH_SIZE / 8;
4826 fprintf (stderr, "Bump up %s by %ld, current value = %ld\n",
4827 lsect->sym_hash->root.root.string,
4828 (long)ARCH_SIZE / 8,
4829 (long)lsect->sym_hash->root.u.def.value);
4835 linker_section_ptr->offset = lsect->section->_raw_size;
4837 lsect->section->_raw_size += ARCH_SIZE / 8;
4840 fprintf (stderr, "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
4841 lsect->name, (long)linker_section_ptr->offset, (long)lsect->section->_raw_size);
4849 #define bfd_put_ptr(BFD,VAL,ADDR) bfd_put_64 (BFD, VAL, ADDR)
4852 #define bfd_put_ptr(BFD,VAL,ADDR) bfd_put_32 (BFD, VAL, ADDR)
4855 /* Fill in the address for a pointer generated in alinker section. */
4858 elf_finish_pointer_linker_section (output_bfd, input_bfd, info, lsect, h, relocation, rel, relative_reloc)
4861 struct bfd_link_info *info;
4862 elf_linker_section_t *lsect;
4863 struct elf_link_hash_entry *h;
4865 const Elf_Internal_Rela *rel;
4868 elf_linker_section_pointers_t *linker_section_ptr;
4870 BFD_ASSERT (lsect != NULL);
4872 if (h != NULL) /* global symbol */
4874 linker_section_ptr = _bfd_elf_find_pointer_linker_section (h->linker_section_pointer,
4878 BFD_ASSERT (linker_section_ptr != NULL);
4880 if (! elf_hash_table (info)->dynamic_sections_created
4883 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)))
4885 /* This is actually a static link, or it is a
4886 -Bsymbolic link and the symbol is defined
4887 locally. We must initialize this entry in the
4890 When doing a dynamic link, we create a .rela.<xxx>
4891 relocation entry to initialize the value. This
4892 is done in the finish_dynamic_symbol routine. */
4893 if (!linker_section_ptr->written_address_p)
4895 linker_section_ptr->written_address_p = true;
4896 bfd_put_ptr (output_bfd, relocation + linker_section_ptr->addend,
4897 lsect->section->contents + linker_section_ptr->offset);
4901 else /* local symbol */
4903 unsigned long r_symndx = ELF_R_SYM (rel->r_info);
4904 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
4905 BFD_ASSERT (elf_local_ptr_offsets (input_bfd)[r_symndx] != NULL);
4906 linker_section_ptr = _bfd_elf_find_pointer_linker_section (elf_local_ptr_offsets (input_bfd)[r_symndx],
4910 BFD_ASSERT (linker_section_ptr != NULL);
4912 /* Write out pointer if it hasn't been rewritten out before */
4913 if (!linker_section_ptr->written_address_p)
4915 linker_section_ptr->written_address_p = true;
4916 bfd_put_ptr (output_bfd, relocation + linker_section_ptr->addend,
4917 lsect->section->contents + linker_section_ptr->offset);
4921 asection *srel = lsect->rel_section;
4922 Elf_Internal_Rela outrel;
4924 /* We need to generate a relative reloc for the dynamic linker. */
4926 lsect->rel_section = srel = bfd_get_section_by_name (elf_hash_table (info)->dynobj,
4929 BFD_ASSERT (srel != NULL);
4931 outrel.r_offset = (lsect->section->output_section->vma
4932 + lsect->section->output_offset
4933 + linker_section_ptr->offset);
4934 outrel.r_info = ELF_R_INFO (0, relative_reloc);
4935 outrel.r_addend = 0;
4936 elf_swap_reloca_out (output_bfd, &outrel,
4937 (((Elf_External_Rela *)
4938 lsect->section->contents)
4939 + lsect->section->reloc_count));
4940 ++lsect->section->reloc_count;
4945 relocation = (lsect->section->output_offset
4946 + linker_section_ptr->offset
4947 - lsect->hole_offset
4948 - lsect->sym_offset);
4951 fprintf (stderr, "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
4952 lsect->name, (long)relocation, (long)relocation);
4955 /* Subtract out the addend, because it will get added back in by the normal
4957 return relocation - linker_section_ptr->addend;