linux/include/linux/rseq.h

/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
#ifndef _LINUX_RSEQ_H
#define _LINUX_RSEQ_H

#ifdef CONFIG_RSEQ

#include <linux/preempt.h>
#include <linux/sched.h>

/*
 * Map the event mask on the user-space ABI enum rseq_cs_flags
 * for direct mask checks.
 */
enum rseq_event_mask_bits { … };

enum rseq_event_mask { … };

static inline void rseq_set_notify_resume(struct task_struct *t)
{ … }

void __rseq_handle_notify_resume(struct ksignal *sig, struct pt_regs *regs);

static inline void rseq_handle_notify_resume(struct ksignal *ksig,
					     struct pt_regs *regs)
{ … }

static inline void rseq_signal_deliver(struct ksignal *ksig,
				       struct pt_regs *regs)
{ … }

/* rseq_preempt() requires preemption to be disabled. */
static inline void rseq_preempt(struct task_struct *t)
{ … }

/* rseq_migrate() requires preemption to be disabled. */
static inline void rseq_migrate(struct task_struct *t)
{ … }

/*
 * If parent process has a registered restartable sequences area, the
 * child inherits. Unregister rseq for a clone with CLONE_VM set.
 */
static inline void rseq_fork(struct task_struct *t, unsigned long clone_flags)
{ … }

static inline void rseq_execve(struct task_struct *t)
{ … }

#else

static inline void rseq_set_notify_resume(struct task_struct *t)
{
}
static inline void rseq_handle_notify_resume(struct ksignal *ksig,
					     struct pt_regs *regs)
{
}
static inline void rseq_signal_deliver(struct ksignal *ksig,
				       struct pt_regs *regs)
{
}
static inline void rseq_preempt(struct task_struct *t)
{
}
static inline void rseq_migrate(struct task_struct *t)
{
}
static inline void rseq_fork(struct task_struct *t, unsigned long clone_flags)
{
}
static inline void rseq_execve(struct task_struct *t)
{
}

#endif

#ifdef CONFIG_DEBUG_RSEQ

void rseq_syscall(struct pt_regs *regs);

#else

static inline void rseq_syscall(struct pt_regs *regs)
{
}

#endif

#endif /* _LINUX_RSEQ_H */