cregit-Linux how code gets into the kernel

Release 4.12 include/uapi/linux/reboot.h

#ifndef _UAPI_LINUX_REBOOT_H

#define _UAPI_LINUX_REBOOT_H

/*
 * Magic values required to use _reboot() system call.
 */


#define	LINUX_REBOOT_MAGIC1	0xfee1dead

#define	LINUX_REBOOT_MAGIC2	672274793

#define	LINUX_REBOOT_MAGIC2A	85072278

#define	LINUX_REBOOT_MAGIC2B	369367448

#define	LINUX_REBOOT_MAGIC2C	537993216


/*
 * Commands accepted by the _reboot() system call.
 *
 * RESTART     Restart system using default command and mode.
 * HALT        Stop OS and give system control to ROM monitor, if any.
 * CAD_ON      Ctrl-Alt-Del sequence causes RESTART command.
 * CAD_OFF     Ctrl-Alt-Del sequence sends SIGINT to init task.
 * POWER_OFF   Stop OS and remove all power from system, if possible.
 * RESTART2    Restart system using given command string.
 * SW_SUSPEND  Suspend system using software suspend if compiled in.
 * KEXEC       Restart system using a previously loaded Linux kernel
 */


#define	LINUX_REBOOT_CMD_RESTART	0x01234567

#define	LINUX_REBOOT_CMD_HALT		0xCDEF0123

#define	LINUX_REBOOT_CMD_CAD_ON		0x89ABCDEF

#define	LINUX_REBOOT_CMD_CAD_OFF	0x00000000

#define	LINUX_REBOOT_CMD_POWER_OFF	0x4321FEDC

#define	LINUX_REBOOT_CMD_RESTART2	0xA1B2C3D4

#define	LINUX_REBOOT_CMD_SW_SUSPEND	0xD000FCE2

#define	LINUX_REBOOT_CMD_KEXEC		0x45584543



#endif /* _UAPI_LINUX_REBOOT_H */

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