sysdeps/unix/sysv/linux/powerpc/gettimeofday.c

   1 /* Copyright (C) 2005-2014 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <http://www.gnu.org/licenses/>.  */
  17
  18
  19 #include <sys/time.h>
  20
  21 #ifdef SHARED
  22
  23 # include <dl-vdso.h>
  24 # include <bits/libc-vdso.h>
  25 # include <dl-machine.h>
  26
  27 void *gettimeofday_ifunc (void) __asm__ ("__gettimeofday");
  28
  29 static int
  30 __gettimeofday_syscall (struct timeval *tv, struct timezone *tz)
  31 {
  32   return INLINE_SYSCALL (gettimeofday, 2, tv, tz);
  33 }
  34
  35 void *
  36 gettimeofday_ifunc (void)
  37 {
  38   /* If the vDSO is not available we fall back syscall.  */
  39   return (__vdso_gettimeofday ? VDSO_IFUNC_RET (__vdso_gettimeofday)
  40           : __gettimeofday_syscall);
  41 }
  42 asm (".type __gettimeofday, %gnu_indirect_function");
  43
  44 /* This is doing "libc_hidden_def (__gettimeofday)" but the compiler won't
  45    let us do it in C because it doesn't know we're defining __gettimeofday
  46    here in this file.  */
  47 asm (".globl __GI___gettimeofday\n"
  48      "__GI___gettimeofday = __gettimeofday");
  49
  50 #else
  51
  52 # include <sysdep.h>
  53 # include <errno.h>
  54
  55 int
  56 __gettimeofday (struct timeval *tv, struct timezone *tz)
  57 {
  58   return INLINE_SYSCALL (gettimeofday, 2, tv, tz);
  59 }
  60 libc_hidden_def (__gettimeofday)
  61
  62 #endif
  63 weak_alias (__gettimeofday, gettimeofday)
  64 libc_hidden_weak (gettimeofday)