2010-06-30 23:26:11 +08:00
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/* Multiple versions of __memcpy_chk
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2012-10-10 22:49:12 +08:00
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All versions must be listed in ifunc-impl-list.c.
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Copyright (C) 2010-2012 Free Software Foundation, Inc.
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2010-06-30 23:26:11 +08:00
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Contributed by Intel Corporation.
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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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2012-02-10 07:18:22 +08:00
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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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2010-06-30 23:26:11 +08:00
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#include <sysdep.h>
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#include <init-arch.h>
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/* Define multiple versions only for the definition in lib and for
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DSO. There are no multiarch memcpy functions for static binaries.
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*/
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#ifndef NOT_IN_libc
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# ifdef SHARED
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.text
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ENTRY(__memcpy_chk)
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.type __memcpy_chk, @gnu_indirect_function
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cmpl $0, KIND_OFFSET+__cpu_features(%rip)
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jne 1f
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call __init_cpu_features
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1: leaq __memcpy_chk_sse2(%rip), %rax
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testl $bit_SSSE3, __cpu_features+CPUID_OFFSET+index_SSSE3(%rip)
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jz 2f
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leaq __memcpy_chk_ssse3(%rip), %rax
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testl $bit_Fast_Copy_Backward, __cpu_features+FEATURE_OFFSET+index_Fast_Copy_Backward(%rip)
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jz 2f
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leaq __memcpy_chk_ssse3_back(%rip), %rax
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2: ret
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END(__memcpy_chk)
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# else
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# include "../memcpy_chk.S"
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# endif
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#endif
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