0x0000000f
  "   €l–Эm_J*j"TвЃvаp@SЌяїѓh№ВГ      0
  +   €l–Ь4э( ©і( 	ЕЂfаB¦-яА„Џѕя_†I|ҐЏ+ДЕ ?ч     /* SPDX-License-Identifier: GPL-2.0 */
#ifndef __LINUX_ENTRYCOMMON_H
#define __LINUX_ENTRYCOMMON_H

#include <linux/static_call_types.h>
#include <linux/ptrace.h>
#include <linux/syscalls.h>
#include <linux/seccomp.h>
#include <linux/sched.h>

#include <asm/entry-common.h>

/*
 * Define dummy _TIF work flags if not defined by the architecture or for
 * disabled functionality.
 */
#ifndef _TIF_PATCH_PENDING
# define _TIF_PATCH_PENDING		(0)
#endif

#ifndef _TIF_UPROBE
# define _TIF_UPROBE			(0)
#endif

/*
 * SYSCALL_WORK flags handled in syscall_enter_from_user_mode()
 */
#ifndef ARCH_SYSCALL_WORK_ENTER
# define ARCH_SYSCALL_WORK_ENTER	(0)
#endif

/*
 * SYSCALL_WORK flags handled in syscall_exit_to_user_mode()
 */
#ifndef ARCH_SYSCALL_WORK_EXIT
# define ARCH_SYSCALL_WORK_EXIT		(0)
#endif

#define SYSCALL_WORK_ENTER	(SYSCALL_WORK_SECCOMP |			\
				 SYSCALL_WORK_SYSCALL_TRACEPOINT |	\
				 SYSCALL_WORK_SYSCALL_TRACE |		\
				 SYSCALL_WORK_SYSCALL_EMU |		\
				 SYSCALL_WORK_SYSCALL_AUDIT |		\
				 SYSCALL_WORK_SYSCALL_USER_DISPATCH |	\
				 ARCH_SYSCALL_WORK_ENTER)
#define SYSCALL_WORK_EXIT	(SYSCALL_WORK_SYSCALL_TRACEPOINT |	\
				 SYSCALL_WORK_SYSCALL_TRACE |		\
				 SYSCALL_WORK_SYSCALL_AUDIT |		\
				 SYSCALL_WORK_SYSCALL_USER_DISPATCH |	\
				 SYSCALL_WORK_SYSCALL_EXIT_TRAP	|	\
				 ARCH_SYSCALL_WORK_EXIT)

/*
 * TIF flags handled in exit_to_user_mode_loop()
 */
#ifndef ARCH_EXIT_TO_USER_MODE_WORK
# define ARCH_EXIT_TO_USER_MODE_WORK		(0)
#endif

#ifdef CONFIG_PREEMPT_LAZY
# define _TIF_NEED_RESCHED_MASK	(_TIF_NEED_RESCHED | _TIF_NEED_RESCHED_LAZY)
#else
# define _TIF_NEED_RESCHED_MASK	(_TIF_NEED_RESCHED)
#endif

#define EXIT_TO_USER_MODE_WORK						\
	(_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_UPROBE |		\
	 _TIF_NEED_RESCHED_MASK | _TIF_PATCH_PENDING | _TIF_NOTIFY_SIGNAL |	\
	 ARCH_EXIT_TO_USER_MODE_WORK)

/**
 * arch_enter_from_user_mode - Architecture specific sanity check for user mode regs
 * @regs:	Pointer to currents pt_regs
 *
 * Defaults to an empty implementation. Can be replaced by architecture
 * specific code.
 *
 * Invoked from syscall_enter_from_user_mode() in the non-instrumentable
 * section. Use __always_inline so the compiler cannot push it out of line
 * and make it instrumentable.
 */
static __always_inline void arch_enter_from_user_mode(struct pt_regs *regs);

#ifndef arch_enter_from_user_mode
static __always_inline void arch_enter_from_user_mode(struct pt_regs *regs) {}
#endif

/**
 * enter_from_user_mode - Establish state when coming from user mode
 *
 * Syscall/interrupt entry disables interrupts, but user mode is traced as
 * interrupts enabled. Also with NO_HZ_FULL RCU might be idle.
 *
 * 1) Tell lockdep that interrupts are disabled
 * 2) Invoke context tracking if enabled to reactivate RCU
 * 3) Trace interrupts off state
 *
 * Invoked from architecture specific syscall entry code with interrupts
 * disabled. The calling code has to be non-instrumentable. When the
 * function returns all state is correct and interrupts are still
 * disabled. The subsequent functions can be instrumented.
 *
 * This is invoked when there is architecture specific functionality to be
 * done between establishing state and enabling interrupts. The caller must
 * enable interrupts before invoking syscall_enter_from_user_mode_work().
 */
void enter_from_user_mode(struct pt_regs *regs);

/**
 * syscall_enter_from_user_mode_prepare - Establish state and enable interrupts
 * @regs:	Pointer to currents pt_regs
 *
 * Invoked from architecture specific syscall entry code with interrupts
 * disabled. The calling code has to be non-instrumentable. When the
 * function returns all state is correct, interrupts are enabled and the
 * subsequent functions can be instrumented.
 *
 * This handles lockdep, RCU (context tracking) and tracing state, i.e.
 * the functionality provided by enter_from_user_mode().
 *
 * This is invoked when there is extra architecture specific functionality
 * to be done between