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/* Multiple versions of __memcpy_chk
All versions must be listed in ifunc-impl-list.c.
Copyright (C) 2015 Free Software Foundation, Inc.
Contributed by Intel Corporation.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
/* Define multiple versions only for the definition in lib and for
DSO. There are no multiarch memcpy functions for static binaries.
*/
#if IS_IN (libc)
# ifdef SHARED
# include <stddef.h>
extern void * __memcpy_chk (void *, const void *, size_t, size_t);
extern __typeof (__memcpy_chk) __memcpy_chk_i386 attribute_hidden;
extern __typeof (__memcpy_chk) __memcpy_chk_i586 attribute_hidden;
extern __typeof (__memcpy_chk) __memcpy_chk_i686 attribute_hidden;
extern __typeof (__memcpy_chk) __memcpy_chk_sse2_unaligned attribute_hidden;
extern __typeof (__memcpy_chk) __memcpy_chk_ssse3 attribute_hidden;
extern __typeof (__memcpy_chk) __memcpy_chk_ssse3_rep attribute_hidden;
# include <init-arch.h>
/* Avoid DWARF definition DIE on ifunc symbol so that GDB can handle
ifunc symbol properly. */
extern void *memcpy_chk_ifunc (void) __asm__ ("__memcpy_chk");
void *
memcpy_chk_ifunc (void)
{
if (HAS_CPU_FEATURE (SSE2))
{
if (HAS_ARCH_FEATURE (Fast_Unaligned_Load))
return __memcpy_chk_sse2_unaligned;
else if (HAS_CPU_FEATURE (SSSE3))
{
if (HAS_ARCH_FEATURE (Fast_Rep_String))
return __memcpy_chk_ssse3_rep;
else
return __memcpy_chk_ssse3;
}
}
if (USE_I686)
return __memcpy_chk_i686;
else if (USE_I586)
return __memcpy_chk_i586;
else
return __memcpy_chk_i386;
}
__asm__ (".type __memcpy_chk, %gnu_indirect_function");
# else
# include <debug/memcpy_chk.c>
# endif
#endif
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