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