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 | static inline struct r_found_version |
28 | prepare_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. */ |
57 | extern void *_dl_vdso_vsym (const char *name, |
58 | const struct r_found_version *version) |
59 | attribute_hidden; |
60 | |
61 | #endif /* dl-vdso.h */ |
62 | |