1/* Data for vDSO support. Linux version.
2 Copyright (C) 2020-2023 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 <https://www.gnu.org/licenses/>. */
18
19/* This file is included in three different modes for both static (libc.a)
20 and shared (rtld) modes:
21
22 1. PROCINFO_DECL is defined, meaning we are only interested in
23 declarations. For static it requires use the extern keywork along with
24 the attribute_relro while for shared it will be embedded in the
25 rtld_global_ro.
26
27 2. PROCINFO_DECL and SHARED are not defined. Nothing to do, the default
28 zero initializion is suffice.
29
30 3. PROCINFO_DECL is not defined while SHARED is. Similar to 2., the zero
31 initialization of rtld_global_ro is suffice. */
32
33#ifndef PROCINFO_CLASS
34# define PROCINFO_CLASS
35#endif
36
37#ifndef SHARED
38# define RELRO attribute_relro
39#else
40# define RELRO
41#endif
42
43#if defined PROCINFO_DECL || !defined SHARED
44# ifdef HAVE_CLOCK_GETTIME_VSYSCALL
45PROCINFO_CLASS int (*_dl_vdso_clock_gettime) (clockid_t,
46 struct timespec *) RELRO;
47#endif
48# ifdef HAVE_CLOCK_GETTIME64_VSYSCALL
49PROCINFO_CLASS int (*_dl_vdso_clock_gettime64) (clockid_t,
50 struct __timespec64 *) RELRO;
51#endif
52# ifdef HAVE_GETTIMEOFDAY_VSYSCALL
53PROCINFO_CLASS int (*_dl_vdso_gettimeofday) (struct timeval *, void *) RELRO;
54#endif
55# ifdef HAVE_TIME_VSYSCALL
56PROCINFO_CLASS time_t (*_dl_vdso_time) (time_t *) RELRO;
57# endif
58# ifdef HAVE_GETCPU_VSYSCALL
59PROCINFO_CLASS int (*_dl_vdso_getcpu) (unsigned *, unsigned *, void *) RELRO;
60# endif
61# ifdef HAVE_CLOCK_GETRES_VSYSCALL
62PROCINFO_CLASS int (*_dl_vdso_clock_getres) (clockid_t,
63 struct timespec *) RELRO;
64# endif
65# ifdef HAVE_CLOCK_GETRES64_VSYSCALL
66PROCINFO_CLASS int (*_dl_vdso_clock_getres_time64) (clockid_t,
67 struct __timespec64 *) RELRO;
68# endif
69
70/* PowerPC specific ones. */
71# ifdef HAVE_GET_TBFREQ
72PROCINFO_CLASS uint64_t (*_dl_vdso_get_tbfreq)(void) RELRO;
73# endif
74#endif
75
76#undef RELRO
77#undef PROCINFO_DECL
78#undef PROCINFO_CLASS
79