[mirror_ubuntu-artful-kernel.git] / arch / arm / include / asm / ucontext.h

#ifndef _ASMARM_UCONTEXT_H
#define _ASMARM_UCONTEXT_H

#include <asm/fpstate.h>

/*
 * struct sigcontext only has room for the basic registers, but struct
 * ucontext now has room for all registers which need to be saved and
 * restored.  Coprocessor registers are stored in uc_regspace.  Each
 * coprocessor's saved state should start with a documented 32-bit magic
 * number, followed by a 32-bit word giving the coproccesor's saved size.
 * uc_regspace may be expanded if necessary, although this takes some
 * coordination with glibc.
 */

struct ucontext {
	unsigned long	  uc_flags;
	struct ucontext  *uc_link;
	stack_t		  uc_stack;
	struct sigcontext uc_mcontext;
	sigset_t	  uc_sigmask;
	/* Allow for uc_sigmask growth.  Glibc uses a 1024-bit sigset_t.  */
	int		  __unused[32 - (sizeof (sigset_t) / sizeof (int))];
	/* Last for extensibility.  Eight byte aligned because some
	   coprocessors require eight byte alignment.  */
 	unsigned long	  uc_regspace[128] __attribute__((__aligned__(8)));
};

#ifdef __KERNEL__

/*
 * Coprocessor save state.  The magic values and specific
 * coprocessor's layouts are part of the userspace ABI.  Each one of
 * these should be a multiple of eight bytes and aligned to eight
 * bytes, to prevent unpredictable padding in the signal frame.
 */

/*
 * Dummy padding block: if this magic is encountered, the block should
 * be skipped using the corresponding size field.
 */
#define DUMMY_MAGIC		0xb0d9ed01

#ifdef CONFIG_CRUNCH
#define CRUNCH_MAGIC		0x5065cf03
#define CRUNCH_STORAGE_SIZE	(CRUNCH_SIZE + 8)

struct crunch_sigframe {
	unsigned long	magic;
	unsigned long	size;
	struct crunch_state	storage;
} __attribute__((__aligned__(8)));
#endif

#ifdef CONFIG_IWMMXT
/* iwmmxt_area is 0x98 bytes long, preceded by 8 bytes of signature */
#define IWMMXT_MAGIC		0x12ef842a
#define IWMMXT_STORAGE_SIZE	(IWMMXT_SIZE + 8)

struct iwmmxt_sigframe {
	unsigned long	magic;
	unsigned long	size;
	struct iwmmxt_struct storage;
} __attribute__((__aligned__(8)));
#endif /* CONFIG_IWMMXT */

#ifdef CONFIG_VFP
#define VFP_MAGIC		0x56465001

struct vfp_sigframe
{
	unsigned long		magic;
	unsigned long		size;
	struct user_vfp		ufp;
	struct user_vfp_exc	ufp_exc;
} __attribute__((__aligned__(8)));

/*
 *  8 byte for magic and size, 264 byte for ufp, 12 bytes for ufp_exc,
 *  4 bytes padding.
 */
#define VFP_STORAGE_SIZE	sizeof(struct vfp_sigframe)

#endif /* CONFIG_VFP */

/*
 * Auxiliary signal frame.  This saves stuff like FP state.
 * The layout of this structure is not part of the user ABI,
 * because the config options aren't.  uc_regspace is really
 * one of these.
 */
struct aux_sigframe {
#ifdef CONFIG_CRUNCH
	struct crunch_sigframe	crunch;
#endif
#ifdef CONFIG_IWMMXT
	struct iwmmxt_sigframe	iwmmxt;
#endif
#ifdef CONFIG_VFP
	struct vfp_sigframe	vfp;
#endif
	/* Something that isn't a valid magic number for any coprocessor.  */
	unsigned long		end_magic;
} __attribute__((__aligned__(8)));

#endif

#endif /* !_ASMARM_UCONTEXT_H */
Commit	Line	Data
1da177e4 LT	1	#ifndef _ASMARM_UCONTEXT_H
	2	#define _ASMARM_UCONTEXT_H
	3
85fe0681 DJ	4	#include <asm/fpstate.h>
	5
	6	/*
	7	* struct sigcontext only has room for the basic registers, but struct
	8	* ucontext now has room for all registers which need to be saved and
	9	* restored. Coprocessor registers are stored in uc_regspace. Each
	10	* coprocessor's saved state should start with a documented 32-bit magic
	11	* number, followed by a 32-bit word giving the coproccesor's saved size.
	12	* uc_regspace may be expanded if necessary, although this takes some
	13	* coordination with glibc.
	14	*/
	15
1da177e4 LT	16	struct ucontext {
	17	unsigned long uc_flags;
	18	struct ucontext *uc_link;
	19	stack_t uc_stack;
	20	struct sigcontext uc_mcontext;
85fe0681 DJ	21	sigset_t uc_sigmask;
	22	/* Allow for uc_sigmask growth. Glibc uses a 1024-bit sigset_t. */
	23	int __unused[32 - (sizeof (sigset_t) / sizeof (int))];
	24	/* Last for extensibility. Eight byte aligned because some
	25	coprocessors require eight byte alignment. */
	26	unsigned long uc_regspace[128] __attribute__((__aligned__(8)));
1da177e4 LT	27	};
1da177e4 LT	28
85fe0681 DJ	29	#ifdef __KERNEL__
	30
	31	/*
	32	* Coprocessor save state. The magic values and specific
	33	* coprocessor's layouts are part of the userspace ABI. Each one of
	34	* these should be a multiple of eight bytes and aligned to eight
	35	* bytes, to prevent unpredictable padding in the signal frame.
	36	*/
	37
ce184a0d DM	38	/*
	39	* Dummy padding block: if this magic is encountered, the block should
	40	* be skipped using the corresponding size field.
	41	*/
	42	#define DUMMY_MAGIC 0xb0d9ed01
	43
3bec6ded LB	44	#ifdef CONFIG_CRUNCH
	45	#define CRUNCH_MAGIC 0x5065cf03
	46	#define CRUNCH_STORAGE_SIZE (CRUNCH_SIZE + 8)
	47
	48	struct crunch_sigframe {
	49	unsigned long magic;
	50	unsigned long size;
	51	struct crunch_state storage;
	52	} __attribute__((__aligned__(8)));
	53	#endif
	54
85fe0681	55	#ifdef CONFIG_IWMMXT
25985edc	56	/* iwmmxt_area is 0x98 bytes long, preceded by 8 bytes of signature */
85fe0681 DJ	57	#define IWMMXT_MAGIC 0x12ef842a
	58	#define IWMMXT_STORAGE_SIZE (IWMMXT_SIZE + 8)
	59
	60	struct iwmmxt_sigframe {
	61	unsigned long magic;
	62	unsigned long size;
	63	struct iwmmxt_struct storage;
	64	} __attribute__((__aligned__(8)));
	65	#endif /* CONFIG_IWMMXT */
	66
	67	#ifdef CONFIG_VFP
85fe0681	68	#define VFP_MAGIC 0x56465001
85fe0681 DJ	69
	70	struct vfp_sigframe
	71	{
	72	unsigned long magic;
	73	unsigned long size;
82c6f5a5 ID	74	struct user_vfp ufp;
	75	struct user_vfp_exc ufp_exc;
	76	} __attribute__((__aligned__(8)));
	77
	78	/*
	79	* 8 byte for magic and size, 264 byte for ufp, 12 bytes for ufp_exc,
	80	* 4 bytes padding.
	81	*/
	82	#define VFP_STORAGE_SIZE sizeof(struct vfp_sigframe)
	83
85fe0681 DJ	84	#endif /* CONFIG_VFP */
	85
	86	/*
	87	* Auxiliary signal frame. This saves stuff like FP state.
	88	* The layout of this structure is not part of the user ABI,
	89	* because the config options aren't. uc_regspace is really
	90	* one of these.
	91	*/
	92	struct aux_sigframe {
3bec6ded LB	93	#ifdef CONFIG_CRUNCH
	94	struct crunch_sigframe crunch;
	95	#endif
85fe0681 DJ	96	#ifdef CONFIG_IWMMXT
	97	struct iwmmxt_sigframe iwmmxt;
	98	#endif
82c6f5a5	99	#ifdef CONFIG_VFP
85fe0681 DJ	100	struct vfp_sigframe vfp;
	101	#endif
	102	/* Something that isn't a valid magic number for any coprocessor. */
	103	unsigned long end_magic;
	104	} __attribute__((__aligned__(8)));
	105
	106	#endif
	107
1da177e4	108	#endif /* !_ASMARM_UCONTEXT_H */