Blame sysdeps/x86_64/multiarch/strstr.c

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/* Multiple versions of strstr.
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   All versions must be listed in ifunc-impl-list.c.
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   Copyright (C) 2012-2018 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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/* Redefine strstr so that the compiler won't complain about the type
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   mismatch with the IFUNC selector in strong_alias, below.  */
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#undef  strstr
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#define strstr __redirect_strstr
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#include <string.h>
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#undef  strstr
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#define STRSTR __strstr_sse2
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#ifdef SHARED
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# undef libc_hidden_builtin_def
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# define libc_hidden_builtin_def(name) \
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  __hidden_ver1 (__strstr_sse2, __GI_strstr, __strstr_sse2);
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#endif
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#include "string/strstr.c"
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extern __typeof (__redirect_strstr) __strstr_sse2_unaligned attribute_hidden;
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extern __typeof (__redirect_strstr) __strstr_sse2 attribute_hidden;
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#include "init-arch.h"
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/* Avoid DWARF definition DIE on ifunc symbol so that GDB can handle
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   ifunc symbol properly.  */
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extern __typeof (__redirect_strstr) __libc_strstr;
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libc_ifunc (__libc_strstr,
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	    HAS_ARCH_FEATURE (Fast_Unaligned_Load)
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	    ? __strstr_sse2_unaligned
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	    : __strstr_sse2)
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#undef strstr
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strong_alias (__libc_strstr, strstr)