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c3c4a25e65
The hwcap value is now in linux 5.10 and in glibc bits/hwcap.h, so use that definition. Move the definition to init-arch.h so all ifunc selectors can use it and expose an "mte" shorthand for mte enabled runtime. For now we allow user code to enable tag checks and use PROT_MTE mappings without libc involvment, this is not guaranteed ABI, but can be useful for testing and debugging with MTE.
39 lines
1.4 KiB
C
39 lines
1.4 KiB
C
/* Multiple versions of strlen. AARCH64 version.
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Copyright (C) 2018-2021 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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<https://www.gnu.org/licenses/>. */
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/* Define multiple versions only for the definition in libc. */
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#if IS_IN (libc)
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/* Redefine strlen 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 strlen
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# define strlen __redirect_strlen
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# include <string.h>
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# include <init-arch.h>
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extern __typeof (__redirect_strlen) __strlen;
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extern __typeof (__redirect_strlen) __strlen_mte attribute_hidden;
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extern __typeof (__redirect_strlen) __strlen_asimd attribute_hidden;
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libc_ifunc (__strlen, (mte ? __strlen_mte : __strlen_asimd));
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# undef strlen
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strong_alias (__strlen, strlen);
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#endif
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