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 
13 struct ucontext {
14 	unsigned long	  uc_flags;
15 	struct ucontext	 *uc_link;
16 	stack_t		  uc_stack;
17 	sigset_t	  uc_sigmask;
18 	/* There's some padding here to allow sigset_t to be expanded in the
19 	 * future.  Though this is unlikely, other architectures put uc_sigmask
20 	 * at the end of this structure and explicitly state it can be
21 	 * expanded, so we didn't want to box ourselves in here. */
22 	__u8		  __unused[1024 / 8 - sizeof(sigset_t)];
23 	/* We can't put uc_sigmask at the end of this structure because we need
24 	 * to be able to expand sigcontext in the future.  For example, the
25 	 * vector ISA extension will almost certainly add ISA state.  We want
26 	 * to ensure all user-visible ISA state can be saved and restored via a
27 	 * ucontext, so we're putting this at the end in order to allow for
28 	 * infinite extensibility.  Since we know this will be extended and we
29 	 * assume sigset_t won't be extended an extreme amount, we're
30 	 * prioritizing this. */
31 	struct sigcontext uc_mcontext;
32 };
33 
34 #endif /* _UAPI_ASM_RISCV_UCONTEXT_H */
35