39 lines
1.2 KiB
C
39 lines
1.2 KiB
C
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/* __thread_pointer definition. x86 version.
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Copyright (C) 2021-2022 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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#ifndef _SYS_THREAD_POINTER_H
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#define _SYS_THREAD_POINTER_H
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static inline void *
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__thread_pointer (void)
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{
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#if __GNUC_PREREQ (11, 1)
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return __builtin_thread_pointer ();
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#else
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void *__result;
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# ifdef __x86_64__
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__asm__ ("mov %%fs:0, %0" : "=r" (__result));
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# else
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__asm__ ("mov %%gs:0, %0" : "=r" (__result));
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# endif
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return __result;
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#endif /* !GCC 11 */
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}
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#endif /* _SYS_THREAD_POINTER_H */
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