[v12,05/17] nptl: Add <thread_pointer.h> for LoongArch
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Commit Message
This will be required by the rseq extensible ABI implementation on all
Linux architectures exposing the __rseq_size and __rseq_offset symbols
to set the 'cpu_id' field so applications can test if rseq is
registered.
Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
---
sysdeps/loongarch/nptl/thread_pointer.h | 34 +++++++++++++++++++++++++++++++++
1 file changed, 34 insertions(+)
new file mode 100644
@@ -0,0 +1,34 @@
+/* __thread_pointer definition. loongarch version.
+ Copyright (C) 2021-2024 Free Software Foundation, Inc.
+ 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
+ <https://www.gnu.org/licenses/>. */
+
+#ifndef _SYS_THREAD_POINTER_H
+#define _SYS_THREAD_POINTER_H
+
+static inline void *
+__thread_pointer (void)
+{
+#if __GNUC_PREREQ (14, 1)
+ return __builtin_thread_pointer ();
+#else
+ void *__result;
+ __asm__ ("move %0, $tp" : "=r" (__result));
+ return __result;
+#endif /* !GCC 14 */
+}
+
+#endif /* _SYS_THREAD_POINTER_H */