diff mbox series

nptl: Add <thread_pointer.h> for LoongArch

Message ID 20241031022948.757019-2-caiyinyu@loongson.cn
State New
Headers show
Series nptl: Add <thread_pointer.h> for LoongArch | expand

Commit Message

caiyinyu Oct. 31, 2024, 2:29 a.m. UTC 
[PATCH] LoongArch: Add RSEQ_SIG in rseq.h.

---
 sysdeps/unix/sysv/linux/loongarch/bits/rseq.h | 36 +++++++++++++++++++
 1 file changed, 36 insertions(+)
 create mode 100644 sysdeps/unix/sysv/linux/loongarch/bits/rseq.h

Comments

Xi Ruoyao Oct. 31, 2024, 4:27 a.m. UTC | #1 
On Thu, 2024-10-31 at 10:29 +0800, caiyinyu wrote:
> [PATCH] LoongArch: Add RSEQ_SIG in rseq.h.

This should be the subject instead of a commit message line.

/* snip */

> +   0x002a0010	break	0x10
> +*/
> +
> +#define RSEQ_SIG        0x002a0010

Ok, 0x10 isn't used by the kernel for other purposes now (the kernel
currently uses [0, 13]).

Reviewed-by: Xi Ruoyao <xry111@xry111.site>
diff mbox series

Patch

diff --git a/sysdeps/unix/sysv/linux/loongarch/bits/rseq.h b/sysdeps/unix/sysv/linux/loongarch/bits/rseq.h
new file mode 100644
index 0000000000..7468a05243
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/loongarch/bits/rseq.h
@@ -0,0 +1,36 @@ 
+/* Restartable Sequences Linux LoongArch architecture header.
+   Copyright (C) 2024 Free Software Foundation, Inc.
+
+   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_RSEQ_H
+# error "Never use <bits/rseq.h> directly; include <sys/rseq.h> instead."
+#endif
+
+/* RSEQ_SIG is a signature required before each abort handler code.
+
+   It is a 32-bit value that maps to actual architecture code compiled
+   into applications and libraries.  It needs to be defined for each
+   architecture.  When choosing this value, it needs to be taken into
+   account that generating invalid instructions may have ill effects on
+   tools like objdump, and may also have impact on the CPU speculative
+   execution efficiency in some cases.
+
+   RSEQ_SIG uses the following break instruction:
+
+   0x002a0010	break	0x10
+*/
+
+#define RSEQ_SIG        0x002a0010