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

   1 /* Initialization code run first thing by the ELF startup code.  Linux/s390.
   2    Copyright (C) 2008-2019 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 #include <dl-vdso.h>
  20 #include <libc-vdso.h>
  21
  22 long int (*VDSO_SYMBOL(gettimeofday)) (struct timeval *, void *)
  23    attribute_hidden;
  24
  25 long int (*VDSO_SYMBOL(clock_gettime)) (clockid_t, struct timespec *)
  26   __attribute__ ((nocommon));
  27
  28 long int (*VDSO_SYMBOL(clock_getres)) (clockid_t, struct timespec *)
  29   __attribute__ ((nocommon));
  30
  31 long int (*VDSO_SYMBOL(getcpu)) (unsigned *, unsigned *, void *)
  32    attribute_hidden;
  33
  34 static inline void
  35 _libc_vdso_platform_setup (void)
  36 {
  37   PREPARE_VERSION_KNOWN (linux2629, LINUX_2_6_29);
  38
  39   void *p = _dl_vdso_vsym ("__kernel_gettimeofday", &linux2629);
  40   PTR_MANGLE (p);
  41   VDSO_SYMBOL (gettimeofday) = p;
  42
  43   p = _dl_vdso_vsym ("__kernel_clock_gettime", &linux2629);
  44   PTR_MANGLE (p);
  45   VDSO_SYMBOL (clock_gettime) = p;
  46
  47   p = _dl_vdso_vsym ("__kernel_clock_getres", &linux2629);
  48   PTR_MANGLE (p);
  49   VDSO_SYMBOL (clock_getres) = p;
  50
  51   p = _dl_vdso_vsym ("__kernel_getcpu", &linux2629);
  52   PTR_MANGLE (p);
  53   VDSO_SYMBOL (getcpu) = p;
  54 }
  55
  56 #define VDSO_SETUP _libc_vdso_platform_setup
  57
  58 #include <csu/init-first.c>