[mirror_ubuntu-zesty-kernel.git] / include / linux / personality.h

#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 int);

#endif /* __KERNEL__ */

/*
 * Flags for bug emulation.
 *
 * These occupy the top three bytes.
 */
enum {
	UNAME26	=               0x0020000,
	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  | \
			    ADDR_COMPAT_LAYOUT | \
			    MMAP_PAGE_ZERO)

/*
 * 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 */
Commit	Line	Data
1da177e4 LT	1	#ifndef _LINUX_PERSONALITY_H
	2	#define _LINUX_PERSONALITY_H
	3
34e856e6 RB	4	#ifdef __KERNEL__
34e856e6 RB	5
1da177e4 LT	6	/*
	7	* Handling of different ABIs (personalities).
	8	*/
	9
	10	struct exec_domain;
	11	struct pt_regs;
	12
	13	extern int register_exec_domain(struct exec_domain *);
	14	extern int unregister_exec_domain(struct exec_domain *);
485d5276	15	extern int __set_personality(unsigned int);
1da177e4	16
34e856e6 RB	17	#endif /* __KERNEL__ */
34e856e6 RB	18
1da177e4 LT	19	/*
	20	* Flags for bug emulation.
	21	*
	22	* These occupy the top three bytes.
	23	*/
	24	enum {
be27425d	25	UNAME26 = 0x0020000,
1da177e4 LT	26	ADDR_NO_RANDOMIZE = 0x0040000, /* disable randomization of VA space */
	27	FDPIC_FUNCPTRS = 0x0080000, /* userspace function ptrs point to descriptors
	28	* (signal handling)
	29	*/
	30	MMAP_PAGE_ZERO = 0x0100000,
	31	ADDR_COMPAT_LAYOUT = 0x0200000,
	32	READ_IMPLIES_EXEC = 0x0400000,
	33	ADDR_LIMIT_32BIT = 0x0800000,
	34	SHORT_INODE = 0x1000000,
	35	WHOLE_SECONDS = 0x2000000,
	36	STICKY_TIMEOUTS = 0x4000000,
	37	ADDR_LIMIT_3GB = 0x8000000,
	38	};
	39
	40	/*
	41	* Security-relevant compatibility flags that must be
	42	* cleared upon setuid or setgid exec:
	43	*/
f9fabcb5 JT	44	#define PER_CLEAR_ON_SETID (READ_IMPLIES_EXEC \| \
	45	ADDR_NO_RANDOMIZE \| \
	46	ADDR_COMPAT_LAYOUT \| \
	47	MMAP_PAGE_ZERO)
1da177e4 LT	48
	49	/*
	50	* Personality types.
	51	*
	52	* These go in the low byte. Avoid using the top bit, it will
	53	* conflict with error returns.
	54	*/
	55	enum {
	56	PER_LINUX = 0x0000,
	57	PER_LINUX_32BIT = 0x0000 \| ADDR_LIMIT_32BIT,
	58	PER_LINUX_FDPIC = 0x0000 \| FDPIC_FUNCPTRS,
	59	PER_SVR4 = 0x0001 \| STICKY_TIMEOUTS \| MMAP_PAGE_ZERO,
	60	PER_SVR3 = 0x0002 \| STICKY_TIMEOUTS \| SHORT_INODE,
	61	PER_SCOSVR3 = 0x0003 \| STICKY_TIMEOUTS \|
	62	WHOLE_SECONDS \| SHORT_INODE,
	63	PER_OSR5 = 0x0003 \| STICKY_TIMEOUTS \| WHOLE_SECONDS,
	64	PER_WYSEV386 = 0x0004 \| STICKY_TIMEOUTS \| SHORT_INODE,
	65	PER_ISCR4 = 0x0005 \| STICKY_TIMEOUTS,
	66	PER_BSD = 0x0006,
	67	PER_SUNOS = 0x0006 \| STICKY_TIMEOUTS,
	68	PER_XENIX = 0x0007 \| STICKY_TIMEOUTS \| SHORT_INODE,
	69	PER_LINUX32 = 0x0008,
	70	PER_LINUX32_3GB = 0x0008 \| ADDR_LIMIT_3GB,
	71	PER_IRIX32 = 0x0009 \| STICKY_TIMEOUTS,/* IRIX5 32-bit */
	72	PER_IRIXN32 = 0x000a \| STICKY_TIMEOUTS,/* IRIX6 new 32-bit */
	73	PER_IRIX64 = 0x000b \| STICKY_TIMEOUTS,/* IRIX6 64-bit */
	74	PER_RISCOS = 0x000c,
	75	PER_SOLARIS = 0x000d \| STICKY_TIMEOUTS,
	76	PER_UW7 = 0x000e \| STICKY_TIMEOUTS \| MMAP_PAGE_ZERO,
	77	PER_OSF4 = 0x000f, /* OSF/1 v4 */
	78	PER_HPUX = 0x0010,
	79	PER_MASK = 0x00ff,
	80	};
	81
34e856e6	82	#ifdef __KERNEL__
1da177e4 LT	83
	84	/*
	85	* Description of an execution domain.
	86	*
	87	* The first two members are refernced from assembly source
	88	* and should stay where they are unless explicitly needed.
	89	*/
	90	typedef void (handler_t)(int, struct pt_regs );
	91
	92	struct exec_domain {
	93	const char name; / name of the execdomain */
	94	handler_t handler; /* handler for syscalls */
	95	unsigned char pers_low; /* lowest personality */
	96	unsigned char pers_high; /* highest personality */
	97	unsigned long signal_map; / signal mapping */
	98	unsigned long signal_invmap; / reverse signal mapping */
	99	struct map_segment err_map; / error mapping */
	100	struct map_segment socktype_map; / socket type mapping */
	101	struct map_segment sockopt_map; / socket option mapping */
	102	struct map_segment af_map; / address family mapping */
	103	struct module module; / module context of the ed. */
	104	struct exec_domain next; / linked list (internal) */
	105	};
	106
	107	/*
	108	* Return the base personality without flags.
	109	*/
	110	#define personality(pers) (pers & PER_MASK)
	111
1da177e4 LT	112
	113	/*
	114	* Change personality of the currently running process.
	115	*/
	116	#define set_personality(pers) \
d8b295f2	117	((current->personality == (pers)) ? 0 : __set_personality(pers))
1da177e4	118
34e856e6 RB	119	#endif /* __KERNEL__ */
34e856e6 RB	120
1da177e4	121	#endif /* _LINUX_PERSONALITY_H */