glibc/sysdeps/unix/sysv/linux/dl-vdso-setup.h
Adhemerval Zanella ff500a623d linux: Add support for clock_gettime64 vDSO
No architecture currently defines the vDSO symbol.  On architectures
with 64-bit time_t the HAVE_CLOCK_GETTIME_VSYSCALL is renamed to
HAVE_CLOCK_GETTIME64_VSYSCALL, it simplifies clock_gettime code.

Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
2020-01-03 11:22:07 -03:00

59 lines
2.0 KiB
C

/* ELF symbol initialization functions for VDSO objects. Linux version.
Copyright (C) 2020 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 _DL_VDSO_INIT_H
#define _DL_VDSO_INIT_H
/* Initialize the VDSO functions pointers. */
static inline void __attribute__ ((always_inline))
setup_vdso_pointers (void)
{
#ifdef HAVE_CLOCK_GETTIME_VSYSCALL
GLRO(dl_vdso_clock_gettime) = dl_vdso_vsym (HAVE_CLOCK_GETTIME_VSYSCALL);
#endif
#ifdef HAVE_CLOCK_GETTIME64_VSYSCALL
GLRO(dl_vdso_clock_gettime64) = dl_vdso_vsym (HAVE_CLOCK_GETTIME64_VSYSCALL);
#endif
#ifdef HAVE_GETTIMEOFDAY_VSYSCALL
GLRO(dl_vdso_gettimeofday) = dl_vdso_vsym (HAVE_GETTIMEOFDAY_VSYSCALL);
#endif
#ifdef HAVE_TIME_VSYSCALL
GLRO(dl_vdso_time) = dl_vdso_vsym (HAVE_TIME_VSYSCALL);
#endif
#ifdef HAVE_GETCPU_VSYSCALL
GLRO(dl_vdso_getcpu) = dl_vdso_vsym (HAVE_GETCPU_VSYSCALL);
#endif
#ifdef HAVE_CLOCK_GETRES_VSYSCALL
GLRO(dl_vdso_clock_getres) = dl_vdso_vsym (HAVE_CLOCK_GETRES_VSYSCALL);
#endif
#ifdef HAVE_GET_TBFREQ
GLRO(dl_vdso_get_tbfreq) = dl_vdso_vsym (HAVE_GET_TBFREQ);
#endif
#ifdef HAVE_SIGTRAMP_RT64
GLRO(dl_vdso_sigtramp_rt64) = dl_vdso_vsym (HAVE_SIGTRAMP_RT64);
#endif
#ifdef HAVE_SIGTRAMP_RT32
GLRO(dl_vdso_sigtramp_rt32) = dl_vdso_vsym (HAVE_SIGTRAMP_RT32);
#endif
#ifdef HAVE_SIGTRAMP_32
GLRO(dl_vdso_sigtramp_32) = dl_vdso_vsym (HAVE_SIGTRAMP_32);
#endif
}
#endif