]>
git.ipfire.org Git - thirdparty/glibc.git/blob - sysdeps/unix/sysv/linux/dl-vdso.c
1 /* ELF symbol resolve functions for VDSO objects.
2 Copyright (C) 2005 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 Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the 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 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, write to the Free
17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
27 _dl_vdso_vsym (const char *name
, const char *version
)
29 struct link_map
*map
= GLRO (dl_sysinfo_map
);
35 /* Use a WEAK REF so we don't error out if the symbol is not found. */
37 memset (&wsym
, 0, sizeof (ElfW (Sym
)));
38 wsym
.st_info
= (unsigned char) ELFW (ST_INFO (STB_WEAK
, STT_NOTYPE
));
40 /* Compute hash value to the version string. */
41 struct r_found_version vers
;
44 vers
.hash
= _dl_elf_hash (version
);
45 /* We don't have a specific file where the symbol can be found. */
48 /* Search the scope of the vdso map. */
49 const ElfW (Sym
) *ref
= &wsym
;
50 lookup_t result
= GLRO (dl_lookup_symbol_x
) (name
, map
, &ref
,
55 value
= DL_SYMBOL_ADDRESS (result
, ref
);