mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-23 05:20:06 +00:00
f6fbce7dd7
Add support for the clock_gettim64 vDSO calls. These are protected by the HAVE_CLOCK_GETTIME64_VSYSCALL define. HAVE_CLOCK_GETTIME64_VSYSCALL should be defined for 32-bit platforms (WORDSIZE == 32) that only run on the 5.1 kernel or later. WORDSIZE == 64 platforms can use #define __vdso_clock_gettime64 __vdso_clock_gettime and use the __vdso_clock_gettime syscall as they don't have a __vdso_clock_gettime64 call. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
56 lines
1.9 KiB
C
56 lines
1.9 KiB
C
/* Copyright (C) 2009-2019 Free Software Foundation, Inc.
|
|
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library. If not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#ifndef _LIBC_VDSO_H
|
|
#define _LIBC_VDSO_H
|
|
|
|
#define VDSO_SYMBOL(__name) __vdso_##__name
|
|
|
|
/* Adjust the return IFUNC value from a vDSO symbol accordingly required
|
|
by the ELFv1 ABI. It is used by the architecture to create an ODP
|
|
entry since the kernel vDSO does not provide it. */
|
|
#ifndef VDSO_IFUNC_RET
|
|
# define VDSO_IFUNC_RET(__value) (__value)
|
|
#endif
|
|
|
|
#ifdef HAVE_CLOCK_GETTIME_VSYSCALL
|
|
extern int (*VDSO_SYMBOL(clock_gettime)) (clockid_t, struct timespec *)
|
|
attribute_hidden;
|
|
#endif
|
|
#ifdef HAVE_CLOCK_GETTIME64_VSYSCALL
|
|
extern int (*VDSO_SYMBOL(clock_gettime64)) (clockid_t, struct __timespec64 *)
|
|
attribute_hidden;
|
|
#endif
|
|
#ifdef HAVE_CLOCK_GETRES_VSYSCALL
|
|
extern int (*VDSO_SYMBOL(clock_getres)) (clockid_t, struct timespec *)
|
|
attribute_hidden;
|
|
#endif
|
|
#ifdef HAVE_GETTIMEOFDAY_VSYSCALL
|
|
extern int (*VDSO_SYMBOL (gettimeofday)) (struct timeval *, void *)
|
|
attribute_hidden;
|
|
#endif
|
|
#ifdef HAVE_GETCPU_VSYSCALL
|
|
extern long int (*VDSO_SYMBOL(getcpu)) (unsigned *, unsigned *, void *)
|
|
attribute_hidden;
|
|
#endif
|
|
#ifdef HAVE_TIME_VSYSCALL
|
|
extern time_t (*VDSO_SYMBOL(time)) (time_t *) attribute_hidden;
|
|
#endif
|
|
|
|
#endif /* _LIBC_VDSO_H */
|