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