[linux-block.git] / arch / riscv / include / uapi / asm / ucontext.h

/* SPDX-License-Identifier: GPL-2.0-only WITH Linux-syscall-note */
/*
 * Copyright (C) 2012 ARM Ltd.
 * Copyright (C) 2017 SiFive, Inc.
 *
 * This file was copied from arch/arm64/include/uapi/asm/ucontext.h
 */
#ifndef _UAPI__ASM_UCONTEXT_H
#define _UAPI__ASM_UCONTEXT_H

#include <linux/types.h>

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 /* _UAPI__ASM_UCONTEXT_H */
Commit	Line	Data
d9c52522	1	/* SPDX-License-Identifier: GPL-2.0-only WITH Linux-syscall-note */
e2c0cdfb PD	2	/*
	3	* Copyright (C) 2012 ARM Ltd.
	4	* Copyright (C) 2017 SiFive, Inc.
	5	*
e2c0cdfb PD	6	* This file was copied from arch/arm64/include/uapi/asm/ucontext.h
	7	*/
	8	#ifndef _UAPI__ASM_UCONTEXT_H
	9	#define _UAPI__ASM_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	/* There's some padding here to allow sigset_t to be expanded in the
	19	* future. Though this is unlikely, other architectures put uc_sigmask
	20	* at the end of this structure and explicitly state it can be
	21	* expanded, so we didn't want to box ourselves in here. */
	22	__u8 __unused[1024 / 8 - sizeof(sigset_t)];
	23	/* We can't put uc_sigmask at the end of this structure because we need
	24	* to be able to expand sigcontext in the future. For example, the
	25	* vector ISA extension will almost certainly add ISA state. We want
	26	* to ensure all user-visible ISA state can be saved and restored via a
	27	* ucontext, so we're putting this at the end in order to allow for
	28	* infinite extensibility. Since we know this will be extended and we
	29	* assume sigset_t won't be extended an extreme amount, we're
	30	* prioritizing this. */
	31	struct sigcontext uc_mcontext;
	32	};
	33
	34	#endif /* _UAPI__ASM_UCONTEXT_H */