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ca677d3c3c
Linux 3.15 adds support for clock_gettime, gettimeofday, and time vDSO (commit id 37c975545ec63320789962bf307f000f08fabd48). This patch adds GLIBC supports to use such symbol when they are avaiable. Along with x86 vDSO support, this patch cleanup x86_64 code by moving all common code to x86 common folder. Only init-first.c is different between implementations.
40 lines
1.3 KiB
C
40 lines
1.3 KiB
C
/* gettimeofday - get the time. Linux/i386 version.
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Copyright (C) 2015 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <sys/time.h>
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#ifdef SHARED
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# include <dl-vdso.h>
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# include <errno.h>
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/* If the vDSO is not available we fall back on the syscall. */
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static int
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__gettimeofday_syscall (struct timeval *tv, struct timezone *tz)
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{
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return INLINE_SYSCALL (gettimeofday, 2, tv, tz);
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}
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# define GETTIMEOFAY_FALLBACK (void*) (&__gettimeofday_syscall)
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# undef libc_ifunc_hidden_def
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# define libc_ifunc_hidden_def(name) \
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libc_ifunc_hidden_def1 (__GI_##name, __gettimeofday_syscall)
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#endif
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#include <sysdeps/unix/sysv/linux/x86/gettimeofday.c>
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