[PATCH v12 12/17] nptl: Add <thread_pointer.h> for csky

[Michael Jeanson <mjeanson@efficios.com>]

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/csky/nptl/thread_pointer.h | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/sysdeps/csky/nptl/thread_pointer.h b/sysdeps/csky/nptl/thread_pointer.h
new file mode 100644
index 0000000000..d4847f691a
--- /dev/null
+++ b/sysdeps/csky/nptl/thread_pointer.h
@@ -0,0 +1,30 @@
+/* __thread_pointer definition.  csky 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
+
+register void *__thread_register asm ("r31");
+
+static inline void *
+__thread_pointer (void)
+{
+  return __thread_register;
+}
+
+#endif /* _SYS_THREAD_POINTER_H */

-- 
2.39.2