On 5/18/22 17:26, Huacai Chen wrote:
Add ucontext/sigcontext definition and signal handling support for
LoongArch.
Cc: Eric Biederman <ebiederm@xxxxxxxxxxxx>
Cc: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Huacai Chen <chenhuacai@xxxxxxxxxxx>
---
arch/loongarch/include/uapi/asm/sigcontext.h | 44 ++
arch/loongarch/include/uapi/asm/signal.h | 13 +
arch/loongarch/include/uapi/asm/ucontext.h | 35 ++
arch/loongarch/kernel/signal.c | 566 +++++++++++++++++++
4 files changed, 658 insertions(+)
create mode 100644 arch/loongarch/include/uapi/asm/sigcontext.h
create mode 100644 arch/loongarch/include/uapi/asm/signal.h
create mode 100644 arch/loongarch/include/uapi/asm/ucontext.h
create mode 100644 arch/loongarch/kernel/signal.c
diff --git a/arch/loongarch/include/uapi/asm/sigcontext.h b/arch/loongarch/include/uapi/asm/sigcontext.h
new file mode 100644
index 000000000000..be3d3c6ac83e
--- /dev/null
+++ b/arch/loongarch/include/uapi/asm/sigcontext.h
@@ -0,0 +1,44 @@
+/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
+/*
+ * Author: Hanlu Li <lihanlu@xxxxxxxxxxx>
+ * Huacai Chen <chenhuacai@xxxxxxxxxxx>
+ *
+ * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
+ */
+#ifndef _UAPI_ASM_SIGCONTEXT_H
+#define _UAPI_ASM_SIGCONTEXT_H
+
+#include <linux/types.h>
+#include <linux/posix_types.h>
+
+/* FP context was used */
+#define SC_USED_FP (1 << 0)
+/* Address error was due to memory load */
+#define SC_ADDRERR_RD (1 << 30)
+/* Address error was due to memory store */
+#define SC_ADDRERR_WR (1 << 31)
Looks nice.
BTW: following some communication it appears that the SC_ADDRERR_*
constants are not tightly coupled to BUS_ADRERR after all, so the
spelling is "fixed".
I don't have anything more to comment, because the rest are either
reviewed or non-userspace-ABI that don't exactly require getting right
from the beginning. (Not to say they're flawed.)
Reviewed-by: WANG Xuerui <git@xxxxxxxxxx>
