1 /* time system call for Linux/PowerPC.
2 Copyright (C) 2013-2016 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
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.
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.
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/>. */
20 # ifndef __powerpc64__
21 # define time __redirect_time
23 # define __redirect_time time
29 # include <libc-vdso.h>
30 # include <dl-machine.h>
32 # ifndef __powerpc64__
36 __time_vsyscall (time_t *t
)
38 return INLINE_VSYSCALL (time
, 1, t
);
41 /* __GI_time is defined as hidden and for ppc32 it enables the
42 compiler make a local call (symbol@local) for internal GLIBC usage. It
43 means the PLT won't be used and the ifunc resolver will be called directly.
44 For ppc64 a call to a function in another translation unit might use a
45 different toc pointer thus disallowing direct branchess and making internal
47 # undef libc_hidden_def
48 # define libc_hidden_def(name) \
49 __hidden_ver1 (__time_vsyscall, __GI_time, __time_vsyscall);
51 # endif /* !__powerpc64__ */
54 time_syscall (time_t *t
)
59 if (INLINE_VSYSCALL (gettimeofday
, 2, &tv
, NULL
) < 0)
62 result
= (time_t) tv
.tv_sec
;
69 # define INIT_ARCH() \
70 PREPARE_VERSION (linux2615, "LINUX_2.6.15", 123718565); \
71 void *vdso_time = _dl_vdso_vsym ("__kernel_time", &linux2615);
73 /* If the vDSO is not available we fall back to the syscall. */
74 libc_ifunc_hidden (__redirect_time
, time
,
76 ? VDSO_IFUNC_RET (vdso_time
)
77 : (void *) time_syscall
);
78 libc_hidden_def (time
)
82 #include <sysdeps/posix/time.c>