2 * Copyright (C) 2012 ARM Ltd.
3 * Copyright (C) 2017 SiFive, Inc.
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program. If not, see <http://www.gnu.org/licenses/>.
17 * This file was copied from arch/arm64/include/uapi/asm/ucontext.h
19 #ifndef _UAPI__ASM_UCONTEXT_H
20 #define _UAPI__ASM_UCONTEXT_H
22 #include <linux/types.h>
25 unsigned long uc_flags;
26 struct ucontext *uc_link;
29 /* There's some padding here to allow sigset_t to be expanded in the
30 * future. Though this is unlikely, other architectures put uc_sigmask
31 * at the end of this structure and explicitly state it can be
32 * expanded, so we didn't want to box ourselves in here. */
33 __u8 __unused[1024 / 8 - sizeof(sigset_t)];
34 /* We can't put uc_sigmask at the end of this structure because we need
35 * to be able to expand sigcontext in the future. For example, the
36 * vector ISA extension will almost certainly add ISA state. We want
37 * to ensure all user-visible ISA state can be saved and restored via a
38 * ucontext, so we're putting this at the end in order to allow for
39 * infinite extensibility. Since we know this will be extended and we
40 * assume sigset_t won't be extended an extreme amount, we're
41 * prioritizing this. */
42 struct sigcontext uc_mcontext;
45 #endif /* _UAPI__ASM_UCONTEXT_H */