[PATCH] nptl: Add <thread_pointer.h> for C-SKY

[Florian Weimer]

* Michael Jeanson:

> diff --git a/sysdeps/csky/nptl/thread_pointer.h b/sysdeps/csky/nptl/thread_pointer.h
> new file mode 100644
> index 0000000000..5e1d49df10
> --- /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
> +
> +static inline void *
> +__thread_pointer (void)
> +{
> +  void *__thread_register;
> +  __asm__ ("mov %0, r31" : "=r" (__thread_register));
> +  return __thread_register;
> +}
> +
> +#endif /* _SYS_THREAD_POINTER_H */

This matches the existing READ_THREAD_POINTER macro.

Reviewed-by: Florian Weimer <fweimer@redhat.com>

Thanks,
Florian