[linux-2.6-block.git] / arch / x86 / include / uapi / asm / sigcontext.h

#ifndef _UAPI_ASM_X86_SIGCONTEXT_H
#define _UAPI_ASM_X86_SIGCONTEXT_H

#include <linux/compiler.h>
#include <linux/types.h>

#define FP_XSTATE_MAGIC1	0x46505853U
#define FP_XSTATE_MAGIC2	0x46505845U
#define FP_XSTATE_MAGIC2_SIZE	sizeof(FP_XSTATE_MAGIC2)

/*
 * bytes 464..511 in the current 512byte layout of fxsave/fxrstor frame
 * are reserved for SW usage. On cpu's supporting xsave/xrstor, these bytes
 * are used to extended the fpstate pointer in the sigcontext, which now
 * includes the extended state information along with fpstate information.
 *
 * Presence of FP_XSTATE_MAGIC1 at the beginning of this SW reserved
 * area and FP_XSTATE_MAGIC2 at the end of memory layout
 * (extended_size - FP_XSTATE_MAGIC2_SIZE) indicates the presence of the
 * extended state information in the memory layout pointed by the fpstate
 * pointer in sigcontext.
 */
struct _fpx_sw_bytes {
	__u32 magic1;		/* FP_XSTATE_MAGIC1 */
	__u32 extended_size;	/* total size of the layout referred by
				 * fpstate pointer in the sigcontext.
				 */
	__u64 xfeatures;
				/* feature bit mask (including fp/sse/extended
				 * state) that is present in the memory
				 * layout.
				 */
	__u32 xstate_size;	/* actual xsave state size, based on the
				 * features saved in the layout.
				 * 'extended_size' will be greater than
				 * 'xstate_size'.
				 */
	__u32 padding[7];	/*  for future use. */
};

#ifdef __i386__
/*
 * As documented in the iBCS2 standard..
 *
 * The first part of "struct _fpstate" is just the normal i387
 * hardware setup, the extra "status" word is used to save the
 * coprocessor status word before entering the handler.
 *
 * Pentium III FXSR, SSE support
 *	Gareth Hughes <gareth@valinux.com>, May 2000
 *
 * The FPU state data structure has had to grow to accommodate the
 * extended FPU state required by the Streaming SIMD Extensions.
 * There is no documented standard to accomplish this at the moment.
 */
struct _fpreg {
	unsigned short significand[4];
	unsigned short exponent;
};

struct _fpxreg {
	unsigned short significand[4];
	unsigned short exponent;
	unsigned short padding[3];
};

struct _xmmreg {
	unsigned long element[4];
};

struct _fpstate {
	/* Regular FPU environment */
	unsigned long	cw;
	unsigned long	sw;
	unsigned long	tag;
	unsigned long	ipoff;
	unsigned long	cssel;
	unsigned long	dataoff;
	unsigned long	datasel;
	struct _fpreg	_st[8];
	unsigned short	status;
	unsigned short	magic;		/* 0xffff = regular FPU data only */

	/* FXSR FPU environment */
	unsigned long	_fxsr_env[6];	/* FXSR FPU env is ignored */
	unsigned long	mxcsr;
	unsigned long	reserved;
	struct _fpxreg	_fxsr_st[8];	/* FXSR FPU reg data is ignored */
	struct _xmmreg	_xmm[8];
	unsigned long	padding1[44];

	union {
		unsigned long	padding2[12];
		struct _fpx_sw_bytes sw_reserved; /* represents the extended
						   * state info */
	};
};

#define X86_FXSR_MAGIC		0x0000

#ifndef __KERNEL__
/*
 * User-space might still rely on the old definition:
 */
struct sigcontext {
	unsigned short gs, __gsh;
	unsigned short fs, __fsh;
	unsigned short es, __esh;
	unsigned short ds, __dsh;
	unsigned long edi;
	unsigned long esi;
	unsigned long ebp;
	unsigned long esp;
	unsigned long ebx;
	unsigned long edx;
	unsigned long ecx;
	unsigned long eax;
	unsigned long trapno;
	unsigned long err;
	unsigned long eip;
	unsigned short cs, __csh;
	unsigned long eflags;
	unsigned long esp_at_signal;
	unsigned short ss, __ssh;
	struct _fpstate __user *fpstate;
	unsigned long oldmask;
	unsigned long cr2;
};
#endif /* !__KERNEL__ */

#else /* __i386__ */

/* FXSAVE frame */
/* Note: reserved1/2 may someday contain valuable data. Always save/restore
   them when you change signal frames. */
struct _fpstate {
	__u16	cwd;
	__u16	swd;
	__u16	twd;		/* Note this is not the same as the
				   32bit/x87/FSAVE twd */
	__u16	fop;
	__u64	rip;
	__u64	rdp;
	__u32	mxcsr;
	__u32	mxcsr_mask;
	__u32	st_space[32];	/* 8*16 bytes for each FP-reg */
	__u32	xmm_space[64];	/* 16*16 bytes for each XMM-reg  */
	__u32	reserved2[12];
	union {
		__u32	reserved3[12];
		struct _fpx_sw_bytes sw_reserved; /* represents the extended
						   * state information */
	};
};

#ifndef __KERNEL__
/*
 * User-space might still rely on the old definition:
 */
struct sigcontext {
	__u64 r8;
	__u64 r9;
	__u64 r10;
	__u64 r11;
	__u64 r12;
	__u64 r13;
	__u64 r14;
	__u64 r15;
	__u64 rdi;
	__u64 rsi;
	__u64 rbp;
	__u64 rbx;
	__u64 rdx;
	__u64 rax;
	__u64 rcx;
	__u64 rsp;
	__u64 rip;
	__u64 eflags;		/* RFLAGS */
	__u16 cs;
	__u16 gs;
	__u16 fs;
	__u16 __pad0;
	__u64 err;
	__u64 trapno;
	__u64 oldmask;
	__u64 cr2;
	struct _fpstate __user *fpstate;	/* zero when no FPU context */
#ifdef __ILP32__
	__u32 __fpstate_pad;
#endif
	__u64 reserved1[8];
};
#endif /* !__KERNEL__ */

#endif /* !__i386__ */

struct _header {
	__u64 xfeatures;
	__u64 reserved1[2];
	__u64 reserved2[5];
};

struct _ymmh_state {
	/* 16 * 16 bytes for each YMMH-reg */
	__u32 ymmh_space[64];
};

/*
 * Extended state pointed by the fpstate pointer in the sigcontext.
 * In addition to the fpstate, information encoded in the xstate_hdr
 * indicates the presence of other extended state information
 * supported by the processor and OS.
 */
struct _xstate {
	struct _fpstate fpstate;
	struct _header xstate_hdr;
	struct _ymmh_state ymmh;
	/* new processor state extensions go here */
};

#endif /* _UAPI_ASM_X86_SIGCONTEXT_H */
Commit	Line	Data
af170c50 DH	1	#ifndef _UAPI_ASM_X86_SIGCONTEXT_H
	2	#define _UAPI_ASM_X86_SIGCONTEXT_H
	3
	4	#include <linux/compiler.h>
	5	#include <linux/types.h>
	6
	7	#define FP_XSTATE_MAGIC1 0x46505853U
	8	#define FP_XSTATE_MAGIC2 0x46505845U
	9	#define FP_XSTATE_MAGIC2_SIZE sizeof(FP_XSTATE_MAGIC2)
	10
	11	/*
	12	* bytes 464..511 in the current 512byte layout of fxsave/fxrstor frame
	13	* are reserved for SW usage. On cpu's supporting xsave/xrstor, these bytes
	14	* are used to extended the fpstate pointer in the sigcontext, which now
	15	* includes the extended state information along with fpstate information.
	16	*
	17	* Presence of FP_XSTATE_MAGIC1 at the beginning of this SW reserved
	18	* area and FP_XSTATE_MAGIC2 at the end of memory layout
	19	* (extended_size - FP_XSTATE_MAGIC2_SIZE) indicates the presence of the
	20	* extended state information in the memory layout pointed by the fpstate
	21	* pointer in sigcontext.
	22	*/
	23	struct _fpx_sw_bytes {
	24	__u32 magic1; /* FP_XSTATE_MAGIC1 */
	25	__u32 extended_size; /* total size of the layout referred by
	26	* fpstate pointer in the sigcontext.
	27	*/
400e4b20	28	__u64 xfeatures;
af170c50 DH	29	/* feature bit mask (including fp/sse/extended
	30	* state) that is present in the memory
	31	* layout.
	32	*/
	33	__u32 xstate_size; /* actual xsave state size, based on the
	34	* features saved in the layout.
	35	* 'extended_size' will be greater than
	36	* 'xstate_size'.
	37	*/
	38	__u32 padding[7]; /* for future use. */
	39	};
	40
	41	#ifdef __i386__
	42	/*
	43	* As documented in the iBCS2 standard..
	44	*
	45	* The first part of "struct _fpstate" is just the normal i387
	46	* hardware setup, the extra "status" word is used to save the
	47	* coprocessor status word before entering the handler.
	48	*
	49	* Pentium III FXSR, SSE support
	50	* Gareth Hughes <gareth@valinux.com>, May 2000
	51	*
	52	* The FPU state data structure has had to grow to accommodate the
	53	* extended FPU state required by the Streaming SIMD Extensions.
	54	* There is no documented standard to accomplish this at the moment.
	55	*/
	56	struct _fpreg {
	57	unsigned short significand[4];
	58	unsigned short exponent;
	59	};
	60
	61	struct _fpxreg {
	62	unsigned short significand[4];
	63	unsigned short exponent;
	64	unsigned short padding[3];
	65	};
	66
	67	struct _xmmreg {
	68	unsigned long element[4];
	69	};
	70
	71	struct _fpstate {
	72	/* Regular FPU environment */
	73	unsigned long cw;
	74	unsigned long sw;
	75	unsigned long tag;
	76	unsigned long ipoff;
	77	unsigned long cssel;
	78	unsigned long dataoff;
	79	unsigned long datasel;
	80	struct _fpreg _st[8];
	81	unsigned short status;
	82	unsigned short magic; /* 0xffff = regular FPU data only */
	83
	84	/* FXSR FPU environment */
	85	unsigned long _fxsr_env[6]; /* FXSR FPU env is ignored */
	86	unsigned long mxcsr;
	87	unsigned long reserved;
	88	struct _fpxreg _fxsr_st[8]; /* FXSR FPU reg data is ignored */
	89	struct _xmmreg _xmm[8];
	90	unsigned long padding1[44];
	91
	92	union {
93	unsigned long padding2[12];
94	struct _fpx_sw_bytes sw_reserved; /* represents the extended
95	* state info */
96	};
97	};
98
99	#define X86_FXSR_MAGIC 0x0000
100
101	#ifndef __KERNEL__
102	/*
103	* User-space might still rely on the old definition:
104	*/
105	struct sigcontext {
106	unsigned short gs, __gsh;
107	unsigned short fs, __fsh;
108	unsigned short es, __esh;
109	unsigned short ds, __dsh;
110	unsigned long edi;
111	unsigned long esi;
112	unsigned long ebp;
113	unsigned long esp;
114	unsigned long ebx;
115	unsigned long edx;
116	unsigned long ecx;
117	unsigned long eax;
118	unsigned long trapno;
119	unsigned long err;
120	unsigned long eip;
121	unsigned short cs, __csh;
122	unsigned long eflags;
123	unsigned long esp_at_signal;
124	unsigned short ss, __ssh;
125	struct _fpstate __user *fpstate;
126	unsigned long oldmask;
127	unsigned long cr2;
128	};
129	#endif /* !__KERNEL__ */
130
131	#else /* __i386__ */
132
133	/* FXSAVE frame */
134	/* Note: reserved1/2 may someday contain valuable data. Always save/restore
135	them when you change signal frames. */
136	struct _fpstate {
137	__u16 cwd;
138	__u16 swd;
139	__u16 twd; /* Note this is not the same as the
140	32bit/x87/FSAVE twd */
141	__u16 fop;
142	__u64 rip;
143	__u64 rdp;
144	__u32 mxcsr;
145	__u32 mxcsr_mask;
146	__u32 st_space[32]; /* 816 bytes for each FP-reg /
147	__u32 xmm_space[64]; /* 1616 bytes for each XMM-reg /
148	__u32 reserved2[12];
149	union {
150	__u32 reserved3[12];
151	struct _fpx_sw_bytes sw_reserved; /* represents the extended
152	* state information */
153	};
154	};
155
156	#ifndef __KERNEL__
157	/*
158	* User-space might still rely on the old definition:
159	*/
160	struct sigcontext {
161	__u64 r8;
162	__u64 r9;
163	__u64 r10;
164	__u64 r11;
165	__u64 r12;
166	__u64 r13;
167	__u64 r14;
168	__u64 r15;
169	__u64 rdi;
170	__u64 rsi;
171	__u64 rbp;
172	__u64 rbx;
173	__u64 rdx;
174	__u64 rax;
175	__u64 rcx;
176	__u64 rsp;
177	__u64 rip;
178	__u64 eflags; /* RFLAGS */
179	__u16 cs;
ed596cde LT	180	__u16 gs;
	181	__u16 fs;
	182	__u16 __pad0;
af170c50 DH	183	__u64 err;
	184	__u64 trapno;
	185	__u64 oldmask;
	186	__u64 cr2;
	187	struct _fpstate __user fpstate; / zero when no FPU context */
	188	#ifdef __ILP32__
	189	__u32 __fpstate_pad;
	190	#endif
	191	__u64 reserved1[8];
	192	};
	193	#endif /* !__KERNEL__ */
	194
	195	#endif /* !__i386__ */
	196
3a54450b	197	struct _header {
400e4b20	198	__u64 xfeatures;
af170c50 DH	199	__u64 reserved1[2];
	200	__u64 reserved2[5];
	201	};
	202
	203	struct _ymmh_state {
	204	/* 16 * 16 bytes for each YMMH-reg */
	205	__u32 ymmh_space[64];
	206	};
	207
	208	/*
	209	* Extended state pointed by the fpstate pointer in the sigcontext.
	210	* In addition to the fpstate, information encoded in the xstate_hdr
	211	* indicates the presence of other extended state information
	212	* supported by the processor and OS.
	213	*/
	214	struct _xstate {
	215	struct _fpstate fpstate;
3a54450b	216	struct _header xstate_hdr;
af170c50 DH	217	struct _ymmh_state ymmh;
	218	/* new processor state extensions go here */
	219	};
	220
	221	#endif /* _UAPI_ASM_X86_SIGCONTEXT_H */