arch/x86/include/asm/sigcontext.h - kernel/prism - Git at Google

 #ifndef _ASM_X86_SIGCONTEXT_H
 #define _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 xstate_bv;
 				/* 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

 #ifdef __KERNEL__
 struct sigcontext {
 	unsigned short gs, __gsh;
 	unsigned short fs, __fsh;
 	unsigned short es, __esh;
 	unsigned short ds, __dsh;
 	unsigned long di;
 	unsigned long si;
 	unsigned long bp;
 	unsigned long sp;
 	unsigned long bx;
 	unsigned long dx;
 	unsigned long cx;
 	unsigned long ax;
 	unsigned long trapno;
 	unsigned long err;
 	unsigned long ip;
 	unsigned short cs, __csh;
 	unsigned long flags;
 	unsigned long sp_at_signal;
 	unsigned short ss, __ssh;

 	/*
 	 * fpstate is really (struct _fpstate *) or (struct _xstate *)
 	 * depending on the FP_XSTATE_MAGIC1 encoded in the SW reserved
 	 * bytes of (struct _fpstate) and FP_XSTATE_MAGIC2 present at the end
 	 * of extended memory layout. See comments at the defintion of
 	 * (struct _fpx_sw_bytes)
 	 */
 	void __user *fpstate;		/* zero when no FPU/extended context */
 	unsigned long oldmask;
 	unsigned long cr2;
 };
 #else /* __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 */
 	};
 };

 #ifdef __KERNEL__
 struct sigcontext {
 	unsigned long r8;
 	unsigned long r9;
 	unsigned long r10;
 	unsigned long r11;
 	unsigned long r12;
 	unsigned long r13;
 	unsigned long r14;
 	unsigned long r15;
 	unsigned long di;
 	unsigned long si;
 	unsigned long bp;
 	unsigned long bx;
 	unsigned long dx;
 	unsigned long ax;
 	unsigned long cx;
 	unsigned long sp;
 	unsigned long ip;
 	unsigned long flags;
 	unsigned short cs;
 	unsigned short gs;
 	unsigned short fs;
 	unsigned short __pad0;
 	unsigned long err;
 	unsigned long trapno;
 	unsigned long oldmask;
 	unsigned long cr2;

 	/*
 	 * fpstate is really (struct _fpstate *) or (struct _xstate *)
 	 * depending on the FP_XSTATE_MAGIC1 encoded in the SW reserved
 	 * bytes of (struct _fpstate) and FP_XSTATE_MAGIC2 present at the end
 	 * of extended memory layout. See comments at the defintion of
 	 * (struct _fpx_sw_bytes)
 	 */
 	void __user *fpstate;		/* zero when no FPU/extended context */
 	unsigned long reserved1[8];
 };
 #else /* __KERNEL__ */
 /*
  * User-space might still rely on the old definition:
  */
 struct sigcontext {
 	unsigned long r8;
 	unsigned long r9;
 	unsigned long r10;
 	unsigned long r11;
 	unsigned long r12;
 	unsigned long r13;
 	unsigned long r14;
 	unsigned long r15;
 	unsigned long rdi;
 	unsigned long rsi;
 	unsigned long rbp;
 	unsigned long rbx;
 	unsigned long rdx;
 	unsigned long rax;
 	unsigned long rcx;
 	unsigned long rsp;
 	unsigned long rip;
 	unsigned long eflags;		/* RFLAGS */
 	unsigned short cs;
 	unsigned short gs;
 	unsigned short fs;
 	unsigned short __pad0;
 	unsigned long err;
 	unsigned long trapno;
 	unsigned long oldmask;
 	unsigned long cr2;
 	struct _fpstate __user *fpstate;	/* zero when no FPU context */
 	unsigned long reserved1[8];
 };
 #endif /* !__KERNEL__ */

 #endif /* !__i386__ */

 struct _xsave_hdr {
 	__u64 xstate_bv;
 	__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 _xsave_hdr xstate_hdr;
 	struct _ymmh_state ymmh;
 	/* new processor state extensions go here */
 };

 #endif /* _ASM_X86_SIGCONTEXT_H */
	#ifndef _ASM_X86_SIGCONTEXT_H
	#define _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 xstate_bv;
	/* 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

	#ifdef __KERNEL__
	struct sigcontext {
	unsigned short gs, __gsh;
	unsigned short fs, __fsh;
	unsigned short es, __esh;
	unsigned short ds, __dsh;
	unsigned long di;
	unsigned long si;
	unsigned long bp;
	unsigned long sp;
	unsigned long bx;
	unsigned long dx;
	unsigned long cx;
	unsigned long ax;
	unsigned long trapno;
	unsigned long err;
	unsigned long ip;
	unsigned short cs, __csh;
	unsigned long flags;
	unsigned long sp_at_signal;
	unsigned short ss, __ssh;

	/*
	* fpstate is really (struct _fpstate ) or (struct _xstate )
	* depending on the FP_XSTATE_MAGIC1 encoded in the SW reserved
	* bytes of (struct _fpstate) and FP_XSTATE_MAGIC2 present at the end
	* of extended memory layout. See comments at the defintion of
	* (struct _fpx_sw_bytes)
	*/
	void __user fpstate; / zero when no FPU/extended context */
	unsigned long oldmask;
	unsigned long cr2;
	};
	#else /* __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]; /* 816 bytes for each FP-reg /
	__u32 xmm_space[64]; /* 1616 bytes for each XMM-reg /
	__u32 reserved2[12];
	union {
	__u32 reserved3[12];
	struct _fpx_sw_bytes sw_reserved; /* represents the extended
	* state information */
	};
	};

	#ifdef __KERNEL__
	struct sigcontext {
	unsigned long r8;
	unsigned long r9;
	unsigned long r10;
	unsigned long r11;
	unsigned long r12;
	unsigned long r13;
	unsigned long r14;
	unsigned long r15;
	unsigned long di;
	unsigned long si;
	unsigned long bp;
	unsigned long bx;
	unsigned long dx;
	unsigned long ax;
	unsigned long cx;
	unsigned long sp;
	unsigned long ip;
	unsigned long flags;
	unsigned short cs;
	unsigned short gs;
	unsigned short fs;
	unsigned short __pad0;
	unsigned long err;
	unsigned long trapno;
	unsigned long oldmask;
	unsigned long cr2;

	/*
	* fpstate is really (struct _fpstate ) or (struct _xstate )
	* depending on the FP_XSTATE_MAGIC1 encoded in the SW reserved
	* bytes of (struct _fpstate) and FP_XSTATE_MAGIC2 present at the end
	* of extended memory layout. See comments at the defintion of
	* (struct _fpx_sw_bytes)
	*/
	void __user fpstate; / zero when no FPU/extended context */
	unsigned long reserved1[8];
	};
	#else /* __KERNEL__ */
	/*
	* User-space might still rely on the old definition:
	*/
	struct sigcontext {
	unsigned long r8;
	unsigned long r9;
	unsigned long r10;
	unsigned long r11;
	unsigned long r12;
	unsigned long r13;
	unsigned long r14;
	unsigned long r15;
	unsigned long rdi;
	unsigned long rsi;
	unsigned long rbp;
	unsigned long rbx;
	unsigned long rdx;
	unsigned long rax;
	unsigned long rcx;
	unsigned long rsp;
	unsigned long rip;
	unsigned long eflags; /* RFLAGS */
	unsigned short cs;
	unsigned short gs;
	unsigned short fs;
	unsigned short __pad0;
	unsigned long err;
	unsigned long trapno;
	unsigned long oldmask;
	unsigned long cr2;
	struct _fpstate __user fpstate; / zero when no FPU context */
	unsigned long reserved1[8];
	};
	#endif /* !__KERNEL__ */

	#endif /* !__i386__ */

	struct _xsave_hdr {
	__u64 xstate_bv;
	__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 _xsave_hdr xstate_hdr;
	struct _ymmh_state ymmh;
	/* new processor state extensions go here */
	};

	#endif /* _ASM_X86_SIGCONTEXT_H */