1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2 #ifndef __LOONGARCH_UAPI_ASM_UCONTEXT_H
3 #define __LOONGARCH_UAPI_ASM_UCONTEXT_H
4
5 /**
6 * struct ucontext - user context structure
7 * @uc_flags:
8 * @uc_link:
9 * @uc_stack:
10 * @uc_mcontext: holds basic processor state
11 * @uc_sigmask:
12 * @uc_extcontext: holds extended processor state
13 */
14 struct ucontext {
15 unsigned long uc_flags;
16 struct ucontext *uc_link;
17 stack_t uc_stack;
18 sigset_t uc_sigmask;
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 __u8 __unused[1024 / 8 - sizeof(sigset_t)];
24 /* We can't put uc_sigmask at the end of this structure because we need
25 * to be able to expand sigcontext in the future. For example, the
26 * vector ISA extension will almost certainly add ISA state. We want
27 * to ensure all user-visible ISA state can be saved and restored via a
28 * ucontext, so we're putting this at the end in order to allow for
29 * infinite extensibility. Since we know this will be extended and we
30 * assume sigset_t won't be extended an extreme amount, we're
31 * prioritizing this. */
32 struct sigcontext uc_mcontext;
33 };
34
35 #endif /* __LOONGARCH_UAPI_ASM_UCONTEXT_H */
36
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.