| 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 _ASM_RISCV_UCONTEXT_H |
| 9 | #define _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 /* _ASM_RISCV_UCONTEXT_H */ |