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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.
60 lines
1.7 KiB
C
60 lines
1.7 KiB
C
/* time -- Get number of seconds since Epoch. 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 <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 time_t
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__time_syscall (time_t *t)
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{
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INTERNAL_SYSCALL_DECL (err);
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return INTERNAL_SYSCALL (time, err, 1, t);
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}
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# ifndef time_type
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/* The i386 time.c includes this file with a defined time_type macro.
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For x86_64 we have to define it to time as the internal symbol is the
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ifunc'ed one. */
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# define time_type time
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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 on the syscall. */
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libc_ifunc_hidden (time_type, time,
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(_dl_vdso_vsym ("__vdso_time", &linux26)
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?: &__time_syscall))
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libc_hidden_def (time)
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#else
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# include <sysdep.h>
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time_t
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time (time_t *t)
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{
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INTERNAL_SYSCALL_DECL (err);
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return INTERNAL_SYSCALL (time, err, 1, t);
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}
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#endif
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