1/* ELF symbol resolve functions for VDSO objects.
2 Copyright (C) 2005-2019 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
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.
9
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.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
18
19#ifndef _DL_VDSO_H
20#define _DL_VDSO_H 1
21
22#include <assert.h>
23#include <ldsodefs.h>
24#include <dl-hash.h>
25
26/* Create version number record for lookup. */
27static inline struct r_found_version
28prepare_version_base (const char *name, ElfW(Word) hash)
29{
30 assert (hash == _dl_elf_hash (name));
31 return (struct r_found_version) { name, hash, 1, NULL };
32}
33#define prepare_version(vname) \
34 prepare_version_base (VDSO_NAME_##vname, VDSO_HASH_##vname)
35
36/* Use this for the known version sets defined below, where we
37 record their precomputed hash values only once, in this file. */
38#define PREPARE_VERSION_KNOWN(var, vname) \
39 struct r_found_version var = prepare_version (vname);
40
41#define VDSO_NAME_LINUX_2_6 "LINUX_2.6"
42#define VDSO_HASH_LINUX_2_6 61765110
43#define VDSO_NAME_LINUX_2_6_15 "LINUX_2.6.15"
44#define VDSO_HASH_LINUX_2_6_15 123718565
45#define VDSO_NAME_LINUX_2_6_29 "LINUX_2.6.29"
46#define VDSO_HASH_LINUX_2_6_29 123718585
47#define VDSO_NAME_LINUX_2_6_39 "LINUX_2.6.39"
48#define VDSO_HASH_LINUX_2_6_39 123718537
49#define VDSO_NAME_LINUX_4 "LINUX_4"
50#define VDSO_HASH_LINUX_4 14921332
51#define VDSO_NAME_LINUX_4_9 "LINUX_4.9"
52#define VDSO_HASH_LINUX_4_9 61765625
53#define VDSO_NAME_LINUX_4_15 "LINUX_4.15"
54#define VDSO_HASH_LINUX_4_15 182943605
55
56/* Functions for resolving symbols in the VDSO link map. */
57extern void *_dl_vdso_vsym (const char *name,
58 const struct r_found_version *version)
59 attribute_hidden;
60
61#endif /* dl-vdso.h */
62