sysdeps/unix/sysv/linux/s390/init-first.c

   1 /* Initialization code run first thing by the ELF startup code.  Linux/s390.
   2    Copyright (C) 2008-2015 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    <http://www.gnu.org/licenses/>.  */
  18
  19 #ifdef SHARED
  20 # include <dl-vdso.h>
  21 # undef __gettimeofday
  22 # undef __clock_gettime
  23 # undef __clock_getres
  24 # include <libc-vdso.h>
  25
  26 long int (*VDSO_SYMBOL(gettimeofday)) (struct timeval *, void *)
  27    attribute_hidden;
  28
  29 long int (*VDSO_SYMBOL(clock_gettime)) (clockid_t, struct timespec *)
  30   __attribute__ ((nocommon));
  31
  32 long int (*VDSO_SYMBOL(clock_getres)) (clockid_t, struct timespec *)
  33   __attribute__ ((nocommon));
  34
  35
  36 static inline void
  37 _libc_vdso_platform_setup (void)
  38 {
  39   PREPARE_VERSION (linux2629, "LINUX_2.6.29", 123718585);
  40
  41   void *p = _dl_vdso_vsym ("__kernel_gettimeofday", &linux2629);
  42   PTR_MANGLE (p);
  43   VDSO_SYMBOL (gettimeofday) = p;
  44
  45   p = _dl_vdso_vsym ("__kernel_clock_gettime", &linux2629);
  46   PTR_MANGLE (p);
  47   VDSO_SYMBOL (clock_gettime) = p;
  48
  49   p = _dl_vdso_vsym ("__kernel_clock_getres", &linux2629);
  50   PTR_MANGLE (p);
  51   VDSO_SYMBOL (clock_getres) = p;
  52 }
  53
  54 # define VDSO_SETUP _libc_vdso_platform_setup
  55 #endif
  56
  57 #include <csu/init-first.c>