#ifndef _LINUX_PERSONALITY_H

#define _LINUX_PERSONALITY_H

#ifdef __KERNEL__

/*

 * Handling of different ABIs (personalities).

 */

struct exec_domain;

struct pt_regs;

extern int		register_exec_domain(struct exec_domain *);

extern int		unregister_exec_domain(struct exec_domain *);

extern int		__set_personality(unsigned long);

#endif /* __KERNEL__ */

/*

 * Flags for bug emulation.

 *

 * These occupy the top three bytes.

 */

enum {

	ADDR_NO_RANDOMIZE = 	0x0040000,	/* disable randomization of VA space */

	FDPIC_FUNCPTRS =	0x0080000,	/* userspace function ptrs point to descriptors

						 * (signal handling)

						 */

	MMAP_PAGE_ZERO =	0x0100000,

	ADDR_COMPAT_LAYOUT =	0x0200000,

	READ_IMPLIES_EXEC =	0x0400000,

	ADDR_LIMIT_32BIT =	0x0800000,

	SHORT_INODE =		0x1000000,

	WHOLE_SECONDS =		0x2000000,

	STICKY_TIMEOUTS	=	0x4000000,

	ADDR_LIMIT_3GB = 	0x8000000,

};

/*

 * Security-relevant compatibility flags that must be

 * cleared upon setuid or setgid exec:

 */

#define PER_CLEAR_ON_SETID (READ_IMPLIES_EXEC|ADDR_NO_RANDOMIZE)

/*

 * Personality types.

 *

 * These go in the low byte.  Avoid using the top bit, it will

 * conflict with error returns.

 */

enum {

	PER_LINUX =		0x0000,

	PER_LINUX_32BIT =	0x0000 | ADDR_LIMIT_32BIT,

	PER_LINUX_FDPIC =	0x0000 | FDPIC_FUNCPTRS,

	PER_SVR4 =		0x0001 | STICKY_TIMEOUTS | MMAP_PAGE_ZERO,

	PER_SVR3 =		0x0002 | STICKY_TIMEOUTS | SHORT_INODE,

	PER_SCOSVR3 =		0x0003 | STICKY_TIMEOUTS |

					 WHOLE_SECONDS | SHORT_INODE,

	PER_OSR5 =		0x0003 | STICKY_TIMEOUTS | WHOLE_SECONDS,

	PER_WYSEV386 =		0x0004 | STICKY_TIMEOUTS | SHORT_INODE,

	PER_ISCR4 =		0x0005 | STICKY_TIMEOUTS,

	PER_BSD =		0x0006,

	PER_SUNOS =		0x0006 | STICKY_TIMEOUTS,

	PER_XENIX =		0x0007 | STICKY_TIMEOUTS | SHORT_INODE,

	PER_LINUX32 =		0x0008,

	PER_LINUX32_3GB =	0x0008 | ADDR_LIMIT_3GB,

	PER_IRIX32 =		0x0009 | STICKY_TIMEOUTS,/* IRIX5 32-bit */

	PER_IRIXN32 =		0x000a | STICKY_TIMEOUTS,/* IRIX6 new 32-bit */

	PER_IRIX64 =		0x000b | STICKY_TIMEOUTS,/* IRIX6 64-bit */

	PER_RISCOS =		0x000c,

	PER_SOLARIS =		0x000d | STICKY_TIMEOUTS,

	PER_UW7 =		0x000e | STICKY_TIMEOUTS | MMAP_PAGE_ZERO,

	PER_OSF4 =		0x000f,			 /* OSF/1 v4 */

	PER_HPUX =		0x0010,

	PER_MASK =		0x00ff,

};

#ifdef __KERNEL__

/*

 * Description of an execution domain.

 * 

 * The first two members are refernced from assembly source

 * and should stay where they are unless explicitly needed.

 */

typedef void (*handler_t)(int, struct pt_regs *);

struct exec_domain {

	const char		*name;		/* name of the execdomain */

	handler_t		handler;	/* handler for syscalls */

	unsigned char		pers_low;	/* lowest personality */

	unsigned char		pers_high;	/* highest personality */

	unsigned long		*signal_map;	/* signal mapping */

	unsigned long		*signal_invmap;	/* reverse signal mapping */

	struct map_segment	*err_map;	/* error mapping */

	struct map_segment	*socktype_map;	/* socket type mapping */

	struct map_segment	*sockopt_map;	/* socket option mapping */

	struct map_segment	*af_map;	/* address family mapping */

	struct module		*module;	/* module context of the ed. */

	struct exec_domain	*next;		/* linked list (internal) */

};

/*

 * Return the base personality without flags.

 */

#define personality(pers)	(pers & PER_MASK)

/*

 * Change personality of the currently running process.

 */

#define set_personality(pers) \

	((current->personality == (pers)) ? 0 : __set_personality(pers))

#endif /* __KERNEL__ */

#endif /* _LINUX_PERSONALITY_H */