reactos/subsystems/ntvdm/callback.h

   1 /*
   2  * COPYRIGHT:       GPL - See COPYING in the top level directory
   3  * PROJECT:         ReactOS Virtual DOS Machine
   4  * FILE:            callback.h
   5  * PURPOSE:         32-bit Interrupt Handlers
   6  * PROGRAMMERS:     Aleksandar Andrejevic <theflash AT sdf DOT lonestar DOT org>
   7  *                  Hermes Belusca-Maito (hermes.belusca@sfr.fr)
   8  */
   9
  10 #ifndef _CALLBACK_H_
  11 #define _CALLBACK_H_
  12
  13 /* DEFINES ********************************************************************/
  14
  15 /* 32-bit Interrupt Identifiers */
  16 #define EMULATOR_MAX_INT32_NUM  0xFF + 1
  17
  18 #define INT_HANDLER_OFFSET 0x1000
  19 #define COMMON_STUB_OFFSET 0x2000
  20
  21
  22 typedef struct _CALLBACK16
  23 {
  24     ULONG  TrampolineFarPtr; // Where the trampoline zone is placed
  25     USHORT Segment;
  26     USHORT NextOffset;
  27 } CALLBACK16, *PCALLBACK16;
  28
  29
  30 /* FUNCTIONS ******************************************************************/
  31
  32 typedef VOID (WINAPI *EMULATOR_INT32_PROC)(LPWORD Stack);
  33
  34 VOID
  35 InitializeContext(IN PCALLBACK16 Context,
  36                   IN USHORT      Segment,
  37                   IN USHORT      Offset);
  38
  39 VOID
  40 Call16(IN USHORT Segment,
  41        IN USHORT Offset);
  42
  43 ULONG
  44 RegisterCallback16(IN  ULONG   FarPtr,
  45                    IN  LPBYTE  CallbackCode,
  46                    IN  SIZE_T  CallbackSize,
  47                    OUT PSIZE_T CodeSize OPTIONAL);
  48
  49 VOID
  50 RunCallback16(IN PCALLBACK16 Context,
  51               IN ULONG       FarPtr);
  52
  53 ULONG
  54 RegisterInt16(IN  ULONG   FarPtr,
  55               IN  BYTE    IntNumber,
  56               IN  LPBYTE  CallbackCode,
  57               IN  SIZE_T  CallbackSize,
  58               OUT PSIZE_T CodeSize OPTIONAL);
  59
  60 ULONG
  61 RegisterInt32(IN  ULONG   FarPtr,
  62               IN  BYTE    IntNumber,
  63               IN  EMULATOR_INT32_PROC IntHandler,
  64               OUT PSIZE_T CodeSize OPTIONAL);
  65
  66 VOID
  67 Int32Call(IN PCALLBACK16 Context,
  68           IN BYTE IntNumber);
  69
  70 VOID WINAPI Int32Dispatch(LPWORD Stack);
  71 VOID InitializeCallbacks(VOID);
  72
  73 #endif // _CALLBACK_H_
  74
  75 /* EOF */