reactos/subsystems/ntvdm/emulator.h

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/*
* COPYRIGHT: GPL - See COPYING in the top level directory
* PROJECT: ReactOS Virtual DOS Machine
* FILE: emulator.h
* PURPOSE: Minimal x86 machine emulator for the VDM (header file)
* PROGRAMMERS: Aleksandar Andrejevic <theflash AT sdf DOT lonestar DOT org>
*/
#ifndef _EMULATOR_H_
#define _EMULATOR_H_
/* INCLUDES *******************************************************************/
#include "ntvdm.h"
#include <fast486.h>
/* DEFINES ********************************************************************/
/* FLAGS */
#define EMULATOR_FLAG_CF (1 << 0)
#define EMULATOR_FLAG_PF (1 << 2)
#define EMULATOR_FLAG_AF (1 << 4)
#define EMULATOR_FLAG_ZF (1 << 6)
#define EMULATOR_FLAG_SF (1 << 7)
#define EMULATOR_FLAG_TF (1 << 8)
#define EMULATOR_FLAG_IF (1 << 9)
#define EMULATOR_FLAG_DF (1 << 10)
#define EMULATOR_FLAG_OF (1 << 11)
#define EMULATOR_FLAG_NT (1 << 14)
#define EMULATOR_FLAG_RF (1 << 16)
#define EMULATOR_FLAG_VM (1 << 17)
#define EMULATOR_FLAG_AC (1 << 18)
#define EMULATOR_FLAG_VIF (1 << 19)
#define EMULATOR_FLAG_VIP (1 << 20)
#define EMULATOR_FLAG_ID (1 << 21)
/* Common definitions */
#define EMULATOR_BOP 0xC4C4
#define EMULATOR_INT_BOP 0xBEEF
#define STACK_COUNTER 0
#define STACK_INT_NUM 1
#define STACK_IP 2
#define STACK_CS 3
#define STACK_FLAGS 4
enum
{
EMULATOR_EXCEPTION_DIVISION_BY_ZERO,
EMULATOR_EXCEPTION_DEBUG,
EMULATOR_EXCEPTION_NMI,
EMULATOR_EXCEPTION_BREAKPOINT,
EMULATOR_EXCEPTION_OVERFLOW,
EMULATOR_EXCEPTION_BOUND,
EMULATOR_EXCEPTION_INVALID_OPCODE,
EMULATOR_EXCEPTION_NO_FPU,
EMULATOR_EXCEPTION_DOUBLE_FAULT,
EMULATOR_EXCEPTION_FPU_SEGMENT,
EMULATOR_EXCEPTION_INVALID_TSS,
EMULATOR_EXCEPTION_NO_SEGMENT,
EMULATOR_EXCEPTION_STACK_SEGMENT,
EMULATOR_EXCEPTION_GPF,
EMULATOR_EXCEPTION_PAGE_FAULT
};
enum
{
EMULATOR_REG_AX,
EMULATOR_REG_CX,
EMULATOR_REG_DX,
EMULATOR_REG_BX,
EMULATOR_REG_SP,
EMULATOR_REG_BP,
EMULATOR_REG_SI,
EMULATOR_REG_DI,
EMULATOR_REG_ES,
EMULATOR_REG_CS,
EMULATOR_REG_SS,
EMULATOR_REG_DS,
EMULATOR_REG_FS,
EMULATOR_REG_GS
};
extern FAST486_STATE EmulatorContext;
/* FUNCTIONS ******************************************************************/
BOOLEAN EmulatorInitialize();
VOID EmulatorSetStack(WORD Segment, DWORD Offset);
VOID EmulatorExecute(WORD Segment, WORD Offset);
VOID EmulatorInterrupt(BYTE Number);
VOID EmulatorInterruptSignal(VOID);
ULONG EmulatorGetRegister(ULONG Register);
ULONG EmulatorGetProgramCounter(VOID);
VOID EmulatorSetRegister(ULONG Register, ULONG Value);
BOOLEAN EmulatorGetFlag(ULONG Flag);
VOID EmulatorSetFlag(ULONG Flag);
VOID EmulatorClearFlag(ULONG Flag);
VOID EmulatorStep();
VOID EmulatorCleanup();
VOID EmulatorSetA20(BOOLEAN Enabled);
#endif // _EMULATOR_H_
/* EOF */