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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
2.6 KiB
C
84 lines
2.6 KiB
C
/* Copyright (C) 2005-2015 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 <libc-vdso.h>
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# include <dl-machine.h>
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void *gettimeofday_ifunc (void) __asm__ ("__gettimeofday");
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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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void *
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gettimeofday_ifunc (void)
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{
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PREPARE_VERSION (linux2615, "LINUX_2.6.15", 123718565);
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/* If the vDSO is not available we fall back syscall. */
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void *vdso_gettimeofday = _dl_vdso_vsym ("__kernel_gettimeofday", &linux2615);
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return (vdso_gettimeofday ? VDSO_IFUNC_RET (vdso_gettimeofday)
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: (void*)__gettimeofday_syscall);
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}
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asm (".type __gettimeofday, %gnu_indirect_function");
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/* This is doing "libc_hidden_def (__gettimeofday)" but the compiler won't
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let us do it in C because it doesn't know we're defining __gettimeofday
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here in this file. */
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asm (".globl __GI___gettimeofday");
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/* __GI___gettimeofday is defined as hidden and for ppc32 it enables the
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compiler make a local call (symbol@local) for internal GLIBC usage. It
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means the PLT won't be used and the ifunc resolver will be called directly.
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For ppc64 a call to a function in another translation unit might use a
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different toc pointer thus disallowing direct branchess and making internal
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ifuncs calls safe. */
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#ifdef __powerpc64__
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asm ("__GI___gettimeofday = __gettimeofday");
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#else
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int
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__gettimeofday_vsyscall (struct timeval *tv, struct timezone *tz)
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{
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return INLINE_VSYSCALL (gettimeofday, 2, tv, tz);
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}
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asm ("__GI___gettimeofday = __gettimeofday_vsyscall");
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#endif
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#else
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# include <sysdep.h>
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# include <errno.h>
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int
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__gettimeofday (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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libc_hidden_def (__gettimeofday)
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#endif
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weak_alias (__gettimeofday, gettimeofday)
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libc_hidden_weak (gettimeofday)
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