subsystems/mvdm/ntvdm/cpu/x86context.h

   1 /*
   2  * COPYRIGHT:       GPL - See COPYING in the top level directory
   3  * PROJECT:         ReactOS Virtual DOS Machine
   4  * FILE:            subsystems/mvdm/ntvdm/cpu/x86context.h
   5  * PURPOSE:         x86 CPU Context Frame definitions
   6  * PROGRAMMERS:     Hermes Belusca-Maito (hermes.belusca@sfr.fr)
   7  *
   8  * NOTE: Taken from the PSDK.
   9  */
  10
  11 #ifndef __X86CONTEXT_H__
  12 #define __X86CONTEXT_H__
  13
  14 #pragma once
  15
  16 /* Clean everything that may have been defined before */
  17 #undef SIZE_OF_80387_REGISTERS
  18 #undef MAXIMUM_SUPPORTED_EXTENSION
  19 #undef CONTEXT_i386
  20 #undef CONTEXT_i486
  21 #undef CONTEXT_CONTROL
  22 #undef CONTEXT_INTEGER
  23 #undef CONTEXT_SEGMENTS
  24 #undef CONTEXT_FLOATING_POINT
  25 #undef CONTEXT_DEBUG_REGISTERS
  26 #undef CONTEXT_EXTENDED_REGISTERS
  27 #undef CONTEXT_FULL
  28 #undef CONTEXT_ALL
  29 #undef CONTEXT_DEBUGGER
  30 #undef CONTEXT_XSTATE
  31
  32
  33
  34 #define SIZE_OF_80387_REGISTERS         80
  35 #define MAXIMUM_SUPPORTED_EXTENSION     512
  36
  37 #define CONTEXT_i386               0x00010000
  38 #define CONTEXT_i486               0x00010000
  39
  40 #define CONTEXT_CONTROL            (CONTEXT_i386|0x00000001L) // SS:SP, CS:IP, FLAGS, BP
  41 #define CONTEXT_INTEGER            (CONTEXT_i386|0x00000002L) // AX, BX, CX, DX, SI, DI
  42 #define CONTEXT_SEGMENTS           (CONTEXT_i386|0x00000004L) // DS, ES, FS, GS
  43 #define CONTEXT_FLOATING_POINT     (CONTEXT_i386|0x00000008L) // 387 state
  44 #define CONTEXT_DEBUG_REGISTERS    (CONTEXT_i386|0x00000010L) // DB 0-3,6,7
  45 #define CONTEXT_EXTENDED_REGISTERS (CONTEXT_i386|0x00000020L) // CPU-specific extensions
  46
  47 #define CONTEXT_FULL (CONTEXT_CONTROL|CONTEXT_INTEGER|CONTEXT_SEGMENTS)
  48 #define CONTEXT_ALL  (CONTEXT_CONTROL | CONTEXT_INTEGER | CONTEXT_SEGMENTS |  \
  49                       CONTEXT_FLOATING_POINT | CONTEXT_DEBUG_REGISTERS |      \
  50                       CONTEXT_EXTENDED_REGISTERS)
  51
  52 #define CONTEXT_DEBUGGER        (CONTEXT_FULL | CONTEXT_FLOATING_POINT)
  53 #define CONTEXT_XSTATE          (CONTEXT_i386 | 0x00000040L)
  54
  55
  56 typedef struct _X87FLOATING_SAVE_AREA
  57 {
  58     ULONG ControlWord;
  59     ULONG StatusWord;
  60     ULONG TagWord;
  61     ULONG ErrorOffset;
  62     ULONG ErrorSelector;
  63     ULONG DataOffset;
  64     ULONG DataSelector;
  65     UCHAR RegisterArea[SIZE_OF_80387_REGISTERS];
  66     ULONG Cr0NpxState;
  67 } X87FLOATING_SAVE_AREA, *PX87FLOATING_SAVE_AREA;
  68
  69 #include "pshpack4.h"
  70 /*
  71  * x86 CPU Context Frame
  72  */
  73 typedef struct _X86CONTEXT
  74 {
  75     /*
  76      * The flags values within this flag control the contents of
  77      * a CONTEXT record.
  78      */
  79     ULONG ContextFlags;
  80
  81     /*
  82      * Section specified/returned if CONTEXT_DEBUG_REGISTERS
  83      * is set in ContextFlags.
  84      */
  85     ULONG Dr0;
  86     ULONG Dr1;
  87     ULONG Dr2;
  88     ULONG Dr3;
  89     ULONG Dr6;
  90     ULONG Dr7;
  91
  92     /*
  93      * Section specified/returned if CONTEXT_FLOATING_POINT
  94      * is set in ContextFlags.
  95      */
  96     X87FLOATING_SAVE_AREA FloatSave;
  97
  98     /*
  99      * Section specified/returned if CONTEXT_SEGMENTS
 100      * is set in ContextFlags.
 101      */
 102     ULONG SegGs;
 103     ULONG SegFs;
 104     ULONG SegEs;
 105     ULONG SegDs;
 106
 107     /*
 108      * Section specified/returned if CONTEXT_INTEGER
 109      * is set in ContextFlags.
 110      */
 111     ULONG Edi;
 112     ULONG Esi;
 113     ULONG Ebx;
 114     ULONG Edx;
 115     ULONG Ecx;
 116     ULONG Eax;
 117
 118     /*
 119      * Section specified/returned if CONTEXT_CONTROL
 120      * is set in ContextFlags.
 121      */
 122     ULONG Ebp;
 123     ULONG Eip;
 124     ULONG SegCs;
 125     ULONG EFlags;
 126     ULONG Esp;
 127     ULONG SegSs;
 128
 129     /*
 130      * Section specified/returned if CONTEXT_EXTENDED_REGISTERS
 131      * is set in ContextFlags. The format and contexts are processor specific.
 132      */
 133     UCHAR ExtendedRegisters[MAXIMUM_SUPPORTED_EXTENSION];
 134 } X86CONTEXT;
 135 #include "poppack.h"
 136
 137 #endif /* __X86CONTEXT_H__ */