sysdeps/unix/sysv/linux/dl-vdso-setup.h

   1 /* ELF symbol initialization functions for VDSO objects.  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 #ifndef _DL_VDSO_INIT_H
  20 #define _DL_VDSO_INIT_H
  21
  22 /* Initialize the VDSO functions pointers.  */
  23 static inline void __attribute__ ((always_inline))
  24 setup_vdso_pointers (void)
  25 {
  26 #ifdef HAVE_CLOCK_GETTIME_VSYSCALL
  27   GLRO(dl_vdso_clock_gettime) = dl_vdso_vsym (HAVE_CLOCK_GETTIME_VSYSCALL);
  28 #endif
  29 #ifdef HAVE_CLOCK_GETTIME64_VSYSCALL
  30   GLRO(dl_vdso_clock_gettime64) = dl_vdso_vsym (HAVE_CLOCK_GETTIME64_VSYSCALL);
  31 #endif
  32 #ifdef HAVE_GETTIMEOFDAY_VSYSCALL
  33   GLRO(dl_vdso_gettimeofday) = dl_vdso_vsym (HAVE_GETTIMEOFDAY_VSYSCALL);
  34 #endif
  35 #ifdef HAVE_TIME_VSYSCALL
  36   GLRO(dl_vdso_time) = dl_vdso_vsym (HAVE_TIME_VSYSCALL);
  37 #endif
  38 #ifdef HAVE_GETCPU_VSYSCALL
  39   GLRO(dl_vdso_getcpu) = dl_vdso_vsym (HAVE_GETCPU_VSYSCALL);
  40 #endif
  41 #ifdef HAVE_CLOCK_GETRES_VSYSCALL
  42   GLRO(dl_vdso_clock_getres) = dl_vdso_vsym (HAVE_CLOCK_GETRES_VSYSCALL);
  43 #endif
  44 #ifdef HAVE_CLOCK_GETRES64_VSYSCALL
  45   GLRO(dl_vdso_clock_getres_time64) = dl_vdso_vsym (HAVE_CLOCK_GETRES64_VSYSCALL);
  46 #endif
  47 #ifdef HAVE_GET_TBFREQ
  48   GLRO(dl_vdso_get_tbfreq) = dl_vdso_vsym (HAVE_GET_TBFREQ);
  49 #endif
  50 }
  51
  52 #endif