/* * COPYRIGHT: GPL - See COPYING in the top level directory * PROJECT: ReactOS Virtual DOS Machine * FILE: bop.c * PURPOSE: BIOS Operation Handlers * PROGRAMMERS: Aleksandar Andrejevic * Hermes Belusca-Maito (hermes.belusca@sfr.fr) */ /* INCLUDES *******************************************************************/ #define NDEBUG #include "emulator.h" #include "bop.h" #include "bios.h" #include "dos.h" #include "registers.h" LPCWSTR ExceptionName[] = { L"Division By Zero", L"Debug", L"Unexpected Error", L"Breakpoint", L"Integer Overflow", L"Bound Range Exceeded", L"Invalid Opcode", L"FPU Not Available" }; /* * This is the list of registered BOP handlers. */ EMULATOR_BOP_PROC BopProc[EMULATOR_MAX_BOP_NUM] = { NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, ControlBop }; /* * This is the list of registered 32-bit Interrupt handlers. */ EMULATOR_INT32_PROC Int32Proc[EMULATOR_MAX_INT_NUM] = { NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL }; VOID WINAPI Exception(BYTE ExceptionNumber, LPWORD Stack) { WORD CodeSegment, InstructionPointer; PBYTE Opcode; ASSERT(ExceptionNumber < 8); /* Get the CS:IP */ InstructionPointer = Stack[STACK_IP]; CodeSegment = Stack[STACK_CS]; Opcode = (PBYTE)SEG_OFF_TO_PTR(CodeSegment, InstructionPointer); /* Display a message to the user */ DisplayMessage(L"Exception: %s occured at %04X:%04X\n" L"Opcode: %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X", ExceptionName[ExceptionNumber], CodeSegment, InstructionPointer, Opcode[0], Opcode[1], Opcode[2], Opcode[3], Opcode[4], Opcode[5], Opcode[6], Opcode[7], Opcode[8], Opcode[9]); /* Stop the VDM */ VdmRunning = FALSE; return; } // VOID WINAPI IrqDispatch(BYTE IrqNumber, LPWORD Stack) // { // /* Check if this was an PIC IRQ */ // if (IntNum >= BIOS_PIC_MASTER_INT && IntNum < BIOS_PIC_MASTER_INT + 8) // { // /* It was an IRQ from the master PIC */ // BiosHandleIrq(IntNum - BIOS_PIC_MASTER_INT, Stack); // } // else if (IntNum >= BIOS_PIC_SLAVE_INT && IntNum < BIOS_PIC_SLAVE_INT + 8) // { // /* It was an IRQ from the slave PIC */ // BiosHandleIrq(IntNum - BIOS_PIC_SLAVE_INT + 8, Stack); // } // return; // } VOID WINAPI Int32Dispatch(LPWORD Stack) { BYTE IntNum; /* Get the interrupt number */ IntNum = LOBYTE(Stack[STACK_INT_NUM]); /* Check if this was an exception */ if (IntNum < 8) { Exception(IntNum, Stack); return; } /* Check if this was an PIC IRQ */ if (IntNum >= BIOS_PIC_MASTER_INT && IntNum < BIOS_PIC_MASTER_INT + 8) { /* It was an IRQ from the master PIC */ BiosHandleIrq(IntNum - BIOS_PIC_MASTER_INT, Stack); return; } else if (IntNum >= BIOS_PIC_SLAVE_INT && IntNum < BIOS_PIC_SLAVE_INT + 8) { /* It was an IRQ from the slave PIC */ BiosHandleIrq(IntNum - BIOS_PIC_SLAVE_INT + 8, Stack); return; } /* Call the 32-bit Interrupt handler */ if (Int32Proc[IntNum] != NULL) Int32Proc[IntNum](Stack); else DPRINT1("Unhandled 32-bit interrupt: 0x%02X\n", IntNum); } VOID WINAPI ControlBop(LPWORD Stack) { /* Get the Function Number and skip it */ BYTE FuncNum = *(PBYTE)SEG_OFF_TO_PTR(getCS(), getIP()); setIP(getIP() + 1); if (FuncNum == CTRL_BOP_INT32) Int32Dispatch(Stack); else DPRINT1("Unassigned Control BOP Function: 0x%02X\n", FuncNum); } VOID WINAPI RegisterInt32(BYTE IntNumber, EMULATOR_INT32_PROC IntHandler) { Int32Proc[IntNumber] = IntHandler; } VOID WINAPI EmulatorBiosOperation(PFAST486_STATE State, UCHAR BopCode) { WORD StackSegment, StackPointer; LPWORD Stack; /* Get the SS:SP */ StackSegment = State->SegmentRegs[FAST486_REG_SS].Selector; StackPointer = State->GeneralRegs[FAST486_REG_ESP].LowWord; /* Get the stack */ Stack = (LPWORD)SEG_OFF_TO_PTR(StackSegment, StackPointer); /* Call the BOP handler */ if (BopProc[BopCode] != NULL) BopProc[BopCode](Stack); else DPRINT1("Invalid BOP code: 0x%02X\n", BopCode); } /* EOF */