Update.
[glibc.git] / elf / do-rel.h
blob2e0f26bd053cbaf2be469ba194de443428850b71
1 /* Do relocations for ELF dynamic linking.
2 Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Library General Public License as
7 published by the Free Software Foundation; either version 2 of the
8 License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Library General Public License for more details.
15 You should have received a copy of the GNU Library General Public
16 License along with the GNU C Library; see the file COPYING.LIB. If not,
17 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA. */
20 /* This file may be included twice, to define both
21 `elf_dynamic_do_rel' and `elf_dynamic_do_rela'. */
23 #ifdef DO_RELA
24 # define elf_dynamic_do_rel elf_dynamic_do_rela
25 # define Rel Rela
26 # define elf_machine_rel elf_machine_rela
27 #endif
29 #ifndef VERSYMIDX
30 # define VERSYMIDX(sym) (DT_NUM + DT_PROCNUM + DT_VERSIONTAGIDX (sym))
31 #endif
33 /* Perform the relocations in MAP on the running program image as specified
34 by RELTAG, SZTAG. If LAZY is nonzero, this is the first pass on PLT
35 relocations; they should be set up to call _dl_runtime_resolve, rather
36 than fully resolved now. */
38 static inline void
39 elf_dynamic_do_rel (struct link_map *map,
40 ElfW(Addr) reladdr, ElfW(Addr) relsize,
41 int lazy)
43 const ElfW(Rel) *r = (const ElfW(Rel) *)(map->l_addr + reladdr);
44 const ElfW(Rel) *end = (const ElfW(Rel) *)(map->l_addr + reladdr + relsize);
46 if (lazy)
47 /* Doing lazy PLT relocations; they need very little info. */
48 for (; r < end; ++r)
49 elf_machine_lazy_rel (map, r);
50 else
52 const ElfW(Sym) *const symtab =
53 (const ElfW(Sym) *) (map->l_addr + map->l_info[DT_SYMTAB]->d_un.d_ptr);
55 if (map->l_info[VERSYMIDX (DT_VERSYM)])
57 const ElfW(Half) *const version =
58 (const ElfW(Half) *) (map->l_addr
59 + map->l_info[VERSYMIDX (DT_VERSYM)]->d_un.d_ptr);
61 for (; r < end; ++r)
63 ElfW(Half) ndx = version[ELFW(R_SYM) (r->r_info)];
64 elf_machine_rel (map, r, &symtab[ELFW(R_SYM) (r->r_info)],
65 &map->l_versions[ndx],
66 (void *) (map->l_addr + r->r_offset));
69 else
70 for (; r < end; ++r)
71 elf_machine_rel (map, r, &symtab[ELFW(R_SYM) (r->r_info)], NULL,
72 (void *) (map->l_addr + r->r_offset));
76 #undef elf_dynamic_do_rel
77 #undef Rel
78 #undef elf_machine_rel