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. */
27#define PREPARE_VERSION(var, vname, vhash) \
28 struct r_found_version var; \
29 var.name = vname; \
30 var.hidden = 1; \
31 var.hash = vhash; \
32 assert (var.hash == _dl_elf_hash (var.name)); \
33 /* We don't have a specific file where the symbol can be found. */ \
34 var.filename = NULL
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 PREPARE_VERSION (var, VDSO_NAME_##vname, VDSO_HASH_##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_4_15 "LINUX_4.15"
48#define VDSO_HASH_LINUX_4_15 182943605
49
50/* Functions for resolving symbols in the VDSO link map. */
51extern void *_dl_vdso_vsym (const char *name,
52 const struct r_found_version *version)
53 attribute_hidden;
54
55#endif /* dl-vdso.h */
56