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#ifndef _ASMi386_SIGCONTEXT_H

#define _ASMi386_SIGCONTEXT_H

/*

 * 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 accomodate 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   padding[56];

};

#define X86_FXSR_MAGIC          0x0000

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 * fpstate;

        unsigned long oldmask;

        unsigned long cr2;

};

#endif