/*++ BUILD Version: 0001

Copyright (c) 1990  Microsoft Corporation

Module Name:

    X86PC.H

Abstract:

    This file contains macros, function prototypes, and externs for the
    x86 emulator NT version of SoftPC v3.0.

Author:

    Dave Hastings (daveh) 4-11-91

Revision History:

    Jeff Parsons (jeffpar) 14-May-1991
    Essentially copied this file from V86PC.H, except that I had to define
    X86CONTEXT as the x86-compatible version of CONTEXT.

--*/


//
//  Define the size of the 80387 save area, which is in the context frame.
//

#define SIZE_OF_80387_ENVIRONMENT   108
#define SIZE_OF_80387_REGISTERS      80

typedef struct _FLOATING_SAVE_AREA {
    ULONG   ControlWord;
    ULONG   StatusWord;
    ULONG   TagWord;
    ULONG   ErrorOffset;
    ULONG   ErrorSelector;
    ULONG   DataOffset;
    ULONG   DataSelector;
    UCHAR   RegisterArea[SIZE_OF_80387_REGISTERS];
} FLOATING_SAVE_AREA;

typedef FLOATING_SAVE_AREA *PFLOATING_SAVE_AREA;


// x86 Context Frame (copied from nti386.h)
//
//  The layout of the record conforms to a standard call frame.
//

typedef struct _X86CONTEXT {

    //
    // The flags values within this flag control the contents of
    // a CONTEXT record.
    //
    // If the context record is used as an input parameter, then
    // for each portion of the context record controlled by a flag
    // whose value is set, it is assumed that that portion of the
    // context record contains valid context. If the context record
    // is being used to modify a threads context, then only that
    // portion of the threads context will be modified.
    //
    // If the context record is used as an IN OUT parameter to capture
    // the context of a thread, then only those portions of the thread's
    // context corresponding to set flags will be returned.
    //
    // The context record is never used as an OUT only parameter.
    //

    ULONG ContextFlags;

    //
    // This section is specified/returned if CONTEXT_DEBUG_REGISTERS is
    // set in ContextFlags.  Note that CONTEXT_DEBUG_REGISTERS is NOT
    // included in CONTEXT_FULL.
    //

    ULONG   Dr0;
    ULONG   Dr1;
    ULONG   Dr2;
    ULONG   Dr3;
    ULONG   Dr6;
    ULONG   Dr7;

    //
    // This section is specified/returned if the
    // ContextFlags word contians the flag CONTEXT_FLOATING_POINT.
    //

    FLOATING_SAVE_AREA FloatSave;

    //
    // This section is specified/returned if the
    // ContextFlags word contians the flag CONTEXT_SEGMENTS.
    //

    ULONG   SegGs;
    ULONG   SegFs;
    ULONG   SegEs;
    ULONG   SegDs;

    //
    // This section is specified/returned if the
    // ContextFlags word contians the flag CONTEXT_INTEGER.
    //

    ULONG   Edi;
    ULONG   Esi;
    ULONG   Ebx;
    ULONG   Edx;
    ULONG   Ecx;
    ULONG   Eax;

    //
    // This section is specified/returned if the
    // ContextFlags word contians the flag CONTEXT_CONTROL.
    //

    ULONG   Ebp;
    ULONG   Eip;
    ULONG   SegCs;              // MUST BE SANITIZED
    ULONG   EFlags;             // MUST BE SANITIZED
    ULONG   Esp;
    ULONG   SegSs;

} X86CONTEXT, *PX86CONTEXT;