[net-next-2.6.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.
 */

#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, preceeded 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
3bec6ded LB	38	#ifdef CONFIG_CRUNCH
	39	#define CRUNCH_MAGIC 0x5065cf03
	40	#define CRUNCH_STORAGE_SIZE (CRUNCH_SIZE + 8)
	41
	42	struct crunch_sigframe {
	43	unsigned long magic;
	44	unsigned long size;
	45	struct crunch_state storage;
	46	} __attribute__((__aligned__(8)));
	47	#endif
	48
85fe0681 DJ	49	#ifdef CONFIG_IWMMXT
	50	/* iwmmxt_area is 0x98 bytes long, preceeded by 8 bytes of signature */
	51	#define IWMMXT_MAGIC 0x12ef842a
	52	#define IWMMXT_STORAGE_SIZE (IWMMXT_SIZE + 8)
	53
	54	struct iwmmxt_sigframe {
	55	unsigned long magic;
	56	unsigned long size;
	57	struct iwmmxt_struct storage;
	58	} __attribute__((__aligned__(8)));
	59	#endif /* CONFIG_IWMMXT */
	60
	61	#ifdef CONFIG_VFP
85fe0681	62	#define VFP_MAGIC 0x56465001
85fe0681 DJ	63
	64	struct vfp_sigframe
	65	{
	66	unsigned long magic;
	67	unsigned long size;
82c6f5a5 ID	68	struct user_vfp ufp;
	69	struct user_vfp_exc ufp_exc;
	70	} __attribute__((__aligned__(8)));
	71
	72	/*
	73	* 8 byte for magic and size, 264 byte for ufp, 12 bytes for ufp_exc,
	74	* 4 bytes padding.
	75	*/
	76	#define VFP_STORAGE_SIZE sizeof(struct vfp_sigframe)
	77
85fe0681 DJ	78	#endif /* CONFIG_VFP */
	79
	80	/*
	81	* Auxiliary signal frame. This saves stuff like FP state.
	82	* The layout of this structure is not part of the user ABI,
	83	* because the config options aren't. uc_regspace is really
	84	* one of these.
	85	*/
	86	struct aux_sigframe {
3bec6ded LB	87	#ifdef CONFIG_CRUNCH
	88	struct crunch_sigframe crunch;
	89	#endif
85fe0681 DJ	90	#ifdef CONFIG_IWMMXT
	91	struct iwmmxt_sigframe iwmmxt;
	92	#endif
82c6f5a5	93	#ifdef CONFIG_VFP
85fe0681 DJ	94	struct vfp_sigframe vfp;
	95	#endif
	96	/* Something that isn't a valid magic number for any coprocessor. */
	97	unsigned long end_magic;
	98	} __attribute__((__aligned__(8)));
	99
	100	#endif
	101
1da177e4	102	#endif /* !_ASMARM_UCONTEXT_H */