/* time system call for Linux/PowerPC.

   Copyright (C) 2013-2018 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, see

   <http://www.gnu.org/licenses/>.  */

#ifdef SHARED

# ifndef __powerpc64__

#  define time __redirect_time

# else

#  define __redirect_time time

# endif

# include <time.h>

# include <sysdep.h>

# include <dl-vdso.h>

# include <libc-vdso.h>

# include <dl-machine.h>

# ifndef __powerpc64__

#  undef time

time_t

__time_vsyscall (time_t *t)

{

  return INLINE_VSYSCALL (time, 1, t);

}

/* __GI_time is defined as hidden and for ppc32 it enables the

   compiler make a local call (symbol@local) for internal GLIBC usage. It

   means the PLT won't be used and the ifunc resolver will be called directly.

   For ppc64 a call to a function in another translation unit might use a

   different toc pointer thus disallowing direct branchess and making internal

   ifuncs calls safe.  */

#  undef libc_hidden_def

#  define libc_hidden_def(name)					\

  __hidden_ver1 (__time_vsyscall, __GI_time, __time_vsyscall);

# endif /* !__powerpc64__  */

static time_t

time_syscall (time_t *t)

{

  struct timeval tv;

  time_t result;

  if (INLINE_VSYSCALL (gettimeofday, 2, &tv, NULL) < 0)

    result = (time_t) -1;

  else

    result = (time_t) tv.tv_sec;

  if (t != NULL)

    *t = result;

  return result;

}

# define INIT_ARCH()							\

  PREPARE_VERSION (linux2615, "LINUX_2.6.15", 123718565);		\

  void *vdso_time = _dl_vdso_vsym ("__kernel_time", &linux2615);

/* If the vDSO is not available we fall back to the syscall.  */

libc_ifunc_hidden (__redirect_time, time,

		   vdso_time

		   ? VDSO_IFUNC_RET (vdso_time)

		   : (void *) time_syscall);

libc_hidden_def (time)

#else

#include <sysdeps/posix/time.c>

#endif /* !SHARED */