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 /*
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
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