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e23faea6ae
This patch uses the libc_ifunc_hidden macro to create already existing ifunc functions time and gettimeofday on intel. This way, the libc_hidden_def macro can be used instead of the libc_ifunc_hidden_def one which was only used here. Thus the macro is removed from libc-symbols.h. On i386, the __GI_* symbols do not target the ifunc symbol and thus the redirection construct has to be applied here. ChangeLog: * sysdeps/unix/sysv/linux/x86/gettimeofday.c (__gettimeofday): Use libc_ifunc_hidden macro. Use libc_hidden_def instead of libc_ifunc_hidden_def. * sysdeps/unix/sysv/linux/x86/time.c (time): Likewise. * sysdeps/unix/sysv/linux/i386/gettimeofday.c (__gettimeofday): Redirect ifunced function in header for using it as type of ifunc'ed function. Redefine libc_hidden_def to use fallback non ifunc'ed function for __GI_* symbol. * sysdeps/unix/sysv/linux/i386/time.c (time): Likewise. * include/libc-symbols.h (libc_ifunc_hidden_def, libc_ifunc_hidden_def1): Delete macro.
62 lines
1.9 KiB
C
62 lines
1.9 KiB
C
/* gettimeofday - get the time. Linux/x86 version.
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Copyright (C) 2015-2016 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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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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# ifndef __gettimeofday_type
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/* The i386 gettimeofday.c includes this file with a defined
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__gettimeofday_type macro. For x86_64 we have to define it to __gettimeofday
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as the internal symbol is the ifunc'ed one. */
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# define __gettimeofday_type __gettimeofday
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# endif
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# undef INIT_ARCH
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# define INIT_ARCH() PREPARE_VERSION_KNOWN (linux26, LINUX_2_6)
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/* If the vDSO is not available we fall back to syscall. */
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libc_ifunc_hidden (__gettimeofday_type, __gettimeofday,
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(_dl_vdso_vsym ("__vdso_gettimeofday", &linux26)
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?: &__gettimeofday_syscall))
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libc_hidden_def (__gettimeofday)
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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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