1/* SPDX-License-Identifier: GPL-2.0-only WITH Linux-syscall-note */
2/*
3 * Copyright (C) 2012 ARM Ltd.
4 * Copyright (C) 2017 SiFive, Inc.
5 *
6 * This file was copied from arch/arm64/include/uapi/asm/ucontext.h
7 */
8#ifndef _UAPI_ASM_RISCV_UCONTEXT_H
9#define _UAPI_ASM_RISCV_UCONTEXT_H
10
11#include <linux/types.h>
12
13struct ucontext {
14	unsigned long	  uc_flags;
15	struct ucontext	 *uc_link;
16	stack_t		  uc_stack;
17	sigset_t	  uc_sigmask;
18	/*
19	 * There's some padding here to allow sigset_t to be expanded in the
20	 * future.  Though this is unlikely, other architectures put uc_sigmask
21	 * at the end of this structure and explicitly state it can be
22	 * expanded, so we didn't want to box ourselves in here.
23	 */
24	__u8		  __unused[1024 / 8 - sizeof(sigset_t)];
25	/*
26	 * We can't put uc_sigmask at the end of this structure because we need
27	 * to be able to expand sigcontext in the future.  For example, the
28	 * vector ISA extension will almost certainly add ISA state.  We want
29	 * to ensure all user-visible ISA state can be saved and restored via a
30	 * ucontext, so we're putting this at the end in order to allow for
31	 * infinite extensibility.  Since we know this will be extended and we
32	 * assume sigset_t won't be extended an extreme amount, we're
33	 * prioritizing this.
34	 */
35	struct sigcontext uc_mcontext;
36};
37
38#endif /* _UAPI_ASM_RISCV_UCONTEXT_H */
39