mirror of
https://sourceware.org/git/glibc.git
synced 2025-10-30 10:45:40 +03:00
7bf8fb1042
This patch moves the libc-vdso.h internal header from bits folder to default architecture one and also corrects the remaning includes in the files.
84 lines
2.3 KiB
C
84 lines
2.3 KiB
C
/* time system call for Linux/PowerPC.
|
|
Copyright (C) 2013-2015 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
|
|
|
|
# include <time.h>
|
|
# include <sysdep.h>
|
|
# include <dl-vdso.h>
|
|
# include <libc-vdso.h>
|
|
# include <dl-machine.h>
|
|
|
|
void *time_ifunc (void) asm ("time");
|
|
|
|
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;
|
|
}
|
|
|
|
void *
|
|
time_ifunc (void)
|
|
{
|
|
PREPARE_VERSION (linux2615, "LINUX_2.6.15", 123718565);
|
|
|
|
/* If the vDSO is not available we fall back to the syscall. */
|
|
void *vdso_time = _dl_vdso_vsym ("__kernel_time", &linux2615);
|
|
return (vdso_time ? VDSO_IFUNC_RET (vdso_time)
|
|
: (void*)time_syscall);
|
|
}
|
|
asm (".type time, %gnu_indirect_function");
|
|
|
|
/* This is doing "libc_hidden_def (time)" but the compiler won't
|
|
* let us do it in C because it doesn't know we're defining time
|
|
* here in this file. */
|
|
asm (".globl __GI_time");
|
|
|
|
/* __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. */
|
|
#ifdef __powerpc64__
|
|
asm ("__GI_time = time");
|
|
#else
|
|
time_t
|
|
__time_vsyscall (time_t *t)
|
|
{
|
|
return INLINE_VSYSCALL (time, 1, t);
|
|
}
|
|
asm ("__GI_time = __time_vsyscall");
|
|
#endif
|
|
|
|
#else
|
|
|
|
#include <sysdeps/posix/time.c>
|
|
|
|
#endif
|