diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/x86_64/gettimeofday.c')
-rw-r--r-- | sysdeps/unix/sysv/linux/x86_64/gettimeofday.c | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/x86_64/gettimeofday.c b/sysdeps/unix/sysv/linux/x86_64/gettimeofday.c new file mode 100644 index 0000000000..1a773d6412 --- /dev/null +++ b/sysdeps/unix/sysv/linux/x86_64/gettimeofday.c @@ -0,0 +1,49 @@ +/* Copyright (C) 2002, 2003, 2007, 2011 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include <dl-vdso.h> + + +#define VSYSCALL_ADDR_vgettimeofday 0xffffffffff600000ul + + +#ifdef SHARED +void *gettimeofday_ifunc (void) __asm__ ("__gettimeofday"); + +void * +gettimeofday_ifunc (void) +{ + PREPARE_VERSION (linux26, "LINUX_2.6", 61765110); + + /* If the vDSO is not available we fall back on the old vsyscall. */ + return (_dl_vdso_vsym ("gettimeofday", &linux26) + ?: (void *) VSYSCALL_ADDR_vgettimeofday); +} +__asm (".type __gettimeofday, %gnu_indirect_function"); +#else +# include <sys/time.h> + +int +__gettimeofday (struct timeval *tv, struct timezone *tz) +{ + return ((int (*) (struct timeval *, struct timezone *)) VSYSCALL_ADDR_vgettimeofday) (tv, tz); +} +#endif + +weak_alias (__gettimeofday, gettimeofday) +strong_alias (__gettimeofday, __gettimeofday_internal) |