public VM_Executor(VM_Executor last, DWORD Position)
{
FirstMachine = last.FirstMachine;
LastMachine = last;
FileMemory = last.FileMemory;
BaseAddress_Variables = last.BaseAddress_Variables;
BaseAddress_Assembly = last.BaseAddress_Assembly;
HeaderSize = last.HeaderSize;
Filename = last.Filename;
FileMemory.Position = Position;
FirstMachine.MachineIndex++;
Log.DirectPrint("=============================");
Log.DirectPrint("Function Called");
Log.DirectPrint("Machine = %i", FirstMachine.MachineIndex);
Log.DirectPrint("=============================");
}
public VM_Executor(string path)
{
Console.Clear();
// The first Machine ever is this where the file get opend.
FirstMachine = this;
// The last Machine (on Call's)
LastMachine = null;
// Load the File into the Memory and Proceed.
FileMemory = new MemoryBuffer(path);
// magic check
if (FileMemory.ReadInt32() == 0x947844)
{
// version check
if (FileMemory.ReadByte() == 147)
{
BaseAddress_Variables = FileMemory.ReadInt32();
BaseAddress_Assembly = FileMemory.ReadInt32();
HeaderSize = FileMemory.ReadInt32();
Filename = FileMemory.ReadString();
Log.Info("Executing", "File = %s V = 0x%lx A = 0x%lx", Filename, BaseAddress_Variables, BaseAddress_Assembly + HeaderSize);
Log.DirectPrint("=============================");
Log.DirectPrint("Function Called");
Log.DirectPrint("Machine = %i", FirstMachine.MachineIndex);
Log.DirectPrint("=============================");
// set to 0 cause we dont have a header now!
FileMemory.Position = BaseAddress_Assembly - BaseAddress_Assembly + HeaderSize;
Execute();
}
}
}
public void Execute()
{
_Executing = true;
while (_Executing)
{
byte opcode = FileMemory.ReadByte();
//Log.Info("Execute()", "0x%lx 0x%lx", FileMemory.Position, opcode);
#region CALL
if (opcode == 0xE8)
{
DWORD PROCEDURE = FileMemory.ReadInt32();
Log.Info("CALL", "0x%lx", PROCEDURE + FileMemory.Position);
UpdateRegister();
LastMachine = this;
//save the positino of the file.
DWORD LastPosition = FileMemory.Position;
// Create a 'VM_Executor'
VM_Executor vme = new VM_Executor(this, PROCEDURE + FileMemory.Position);
vme.Execute();
// recover the position of the file
FileMemory.Position = LastPosition;
}
#endregion
#region CALL DWORD PTR[...]
else if (opcode == 0xFF)
{
byte next = FileMemory.ReadByte();
// call dword ptr
if (next == 0x15)
{
DWORD READ_FROM = FileMemory.ReadInt32() - BaseAddress_Assembly + HeaderSize;
DWORD PROCEDURE = FileMemory.ReadInt32(READ_FROM) - BaseAddress_Assembly + HeaderSize;
UpdateRegister();
Log.Info("CALL", "[0x%lx] => 0x%lx", READ_FROM, PROCEDURE);
LastMachine = this;
//save the positino of the file.
DWORD LastPosition = FileMemory.Position;
// Create a 'VM_Executor'
VM_Executor vme = new VM_Executor(this, PROCEDURE);
vme.Execute();
// recover the position of the file
FileMemory.Position = LastPosition;
}
}
#endregion
#region PUSH REGISTER
else if (opcode == 0x50 ||
opcode == 0x51 ||
opcode == 0x52 ||
opcode == 0x53 ||
opcode == 0x54 ||
opcode == 0x55 ||
opcode == 0x56 ||
opcode == 0x57)
{
UpdateRegister();
Log.Info("PUSH", "%s", Utils.RegisterToString(Utils.ByteToRegister(opcode, 0x50)));
}
#endregion
#region MOV
// MOV REGISTER, VARIABLE
else if (opcode == 0xB8 | // EAX
opcode == 0xB9 || // ECX
opcode == 0xBA || // EDX
opcode == 0xBB || // EBX
opcode == 0xBC || // ESP
opcode == 0xBD || // EBP
opcode == 0xBE || // ESI
opcode == 0xBF) // EDI
{
DWORD VALUE = FileMemory.ReadInt32();
UpdateRegister();
SetRegisterValue(Utils.ByteToRegister(opcode, 0xB8), VALUE);
Log.Info("MOV", "%s, 0x%lx", Utils.RegisterToString(Utils.ByteToRegister(opcode, 0xB8)), VALUE);
}
else if (opcode == 0x8B || opcode == 0xA1)
{
if (opcode == 0xA1)
{
DWORD READ_FROM = FileMemory.ReadInt32() - BaseAddress_Assembly;
DWORD PROCEDURE = FileMemory.ReadInt32(READ_FROM);
UpdateRegister();
Log.Info("MOV", "EAX, [0x%lx] => 0x%lx", READ_FROM, PROCEDURE);
SetRegisterValue(x32Register.EAX, PROCEDURE);
break;
}
int next = FileMemory.ReadByte();
UpdateRegister();
//todo
switch (next)
{
// EAX
case 0x80: // eax eax
case 0x81: // eax ecx
case 0x82: // eax edx
case 0x83: // eax ebx
case 0x84: // eax esp => next should be 24 then
case 0x85: // eax ebp
case 0x86: // eax esi
case 0x87: // eax edi
// ECX
case 0x88: // ecx eax
case 0x89: // ecx ecx
case 0x8A: // ecx edx
case 0x8B: // ecx ebx
case 0x8C: // ecx esp => next should be 24 then
case 0x8D: // ecx ebp
case 0x8E: // ecx esi
case 0x8F: // ecx edi
// EDX
case 0x90: // edx eax
case 0x91: // edx ecx
case 0x92: // edx edx
case 0x93: // edx ebx
case 0x94: // edx esp => next should be 24 then
case 0x95: // edx ebp
case 0x96: // edx esi
case 0x97: // edx edi
// EBX
case 0x98: // ebx eax
case 0x99: // ebx ecx
case 0x9A: // ebx edx
case 0x9B: // ebx ebx
case 0x9C: // ebx esp => next should be 24 then
case 0x9D: // ebx ebp
case 0x9E: // ebx esi
case 0x9F: // ebx edi
// ESP
case 0xA0: // esp eax
case 0xA1: // esp ecx
case 0xA2: // esp edx
case 0xA3: // esp ebx
case 0xA4: // esp esp => next should be 24 then
case 0xA5: // esp ebp
case 0xA6: // esp esi
case 0xA7: // esp edi
// EBP
case 0xA8: // ebp eax
case 0xA9: // ebp ecx
case 0xAA: // ebp edx
case 0xAB: // ebp ebx
case 0xAC: // ebp esp => next should be 24 then
case 0xAD: // ebp ebp
case 0xAE: // ebp esi
case 0xAF: // ebp edi
// ESI
case 0xB0: // esi eax
case 0xB1: // esi ecx
case 0xB2: // esi edx
case 0xB3: // esi ebx
case 0xB4: // esi esp => next should be 24 then
case 0xB5: // esi ebp
case 0xB6: // esi esi
case 0xB7: // esi edi
// EDI
case 0xB8: // edi eax
case 0xB9: // edi ecx
case 0xBA: // edi edx
case 0xBB: // edi ebx
case 0xBC: // edi esp => next should be 24 then
case 0xBD: // edi ebp
case 0xBE: // edi esi
case 0xBF: // edi edi
{
int s = next - 0xC0;
x32Register firstRegister = (x32Register)(s / 8);
x32Register secondRegister = (x32Register)((int)(s - ((byte)firstRegister * 8)));
DWORD VARIABLE;
if (next == 0x84 || next == 0x8C ||
next == 0x94 || next == 0x9C ||
next == 0xA4 || next == 0xAC ||
next == 0xB4 || next == 0xBC)
{
int next2 = FileMemory.ReadByte();
if (next2 == 0x24)
{
VARIABLE = FileMemory.ReadInt32();
UpdateRegister();
SetRegisterValue(firstRegister, GetRegisterValueByEnum(secondRegister));
Log.Info("MOV", "%s, [%s+0x%lx]", Utils.RegisterToString(firstRegister), Utils.RegisterToString(secondRegister), VARIABLE);
return;
}
}
VARIABLE = FileMemory.ReadInt32();
UpdateRegister();
SetRegisterValue(firstRegister, GetRegisterValueByEnum(secondRegister));
Log.Info("MOV", "%s, [%s+0x%lx]", Utils.RegisterToString(firstRegister), Utils.RegisterToString(secondRegister), VARIABLE);
break;
}
// MOV REGISTER, [VARIABLE]
case 0x0D:
case 0x15:
case 0x1D:
case 0x25:
case 0x2D:
case 0x35:
case 0x3D:
{
DWORD READ_FROM = FileMemory.ReadInt32() - BaseAddress_Assembly + HeaderSize;
DWORD PROCEDURE = FileMemory.ReadInt32(READ_FROM);
UpdateRegister();
Log.Info("MOV", "EAX, [0x%lx] => 0x%lx", READ_FROM, PROCEDURE);
SetRegisterValue(x32Register.ECX, PROCEDURE);
break;
}
// MOV REGISTER, REGISTER
// EAX
case 0xC0:
case 0xC1:
case 0xC2:
case 0xC3:
case 0xC4:
case 0xC5:
case 0xC6:
case 0xC7:
// ECX
case 0xC8:
case 0xC9:
case 0xCA:
case 0xCB:
case 0xCC:
case 0xCD:
case 0xCE:
case 0xCF:
// EDX
case 0xD0:
case 0xD1:
case 0xD2:
case 0xD3:
case 0xD4:
case 0xD5:
case 0xD6:
case 0xD7:
// EBX
case 0xD8:
case 0xD9:
case 0xDA:
case 0xDB:
case 0xDC:
case 0xDD:
case 0xDE:
case 0xDF:
// ESP
case 0xE0:
case 0xE1:
case 0xE2:
case 0xE3:
case 0xE4:
case 0xE5:
case 0xE6:
case 0xE7:
// EBP
case 0xE8:
case 0xE9:
case 0xEA:
case 0xEB:
case 0xEC:
case 0xED:
case 0xEE:
case 0xEF:
// ESI
case 0xF0:
case 0xF1:
case 0xF2:
case 0xF3:
case 0xF4:
case 0xF5:
case 0xF6:
case 0xF7:
// EDI
case 0xF8:
case 0xF9:
case 0xFA:
case 0xFB:
case 0xFC:
case 0xFD:
case 0xFE:
case 0xFF:
{
int s = next - 0xC0;
UpdateRegister();
x32Register firstRegister = (x32Register)(s / 8);
x32Register secondRegister = (x32Register)((int)(s - ((byte)firstRegister * 8)));
SetRegisterValue(firstRegister, GetRegisterValueByEnum(secondRegister));
Log.Info("MOV", "%s, %s", Utils.RegisterToString(firstRegister), Utils.RegisterToString(secondRegister));
break;
}
}
}
#endregion
#region PUSH VALUE
else if (opcode == 0x6A)
{
byte VALUE = FileMemory.ReadByte();
UpdateRegister();
Log.Info("PUSH", "0x%lx", VALUE);
}
#endregion
#region PUSH VARIABLE
else if (opcode == 0x68)
{
DWORD VALUE = FileMemory.ReadInt32();
UpdateRegister();
Log.Info("PUSH", "0x%lx", VALUE);
}
#endregion
#region POP REGISTER
else if (opcode == 0x58 ||
opcode == 0x59 ||
opcode == 0x5A ||
opcode == 0x5B ||
opcode == 0x5C ||
opcode == 0x5D ||
opcode == 0x5E ||
opcode == 0x5F)
{
UpdateRegister();
Log.Info("POP", "%s", Utils.RegisterToString(Utils.ByteToRegister(opcode, 0x58)));
}
#endregion
#region RETURN
else if (opcode == 0xC3)
{
UpdateRegister();
Log.Info("RETN", "");
if (LastMachine == null)
{
Log.Info("Virtual Machine", "The Virtual Machine ended the current File.");
_Executing = false;
return;
}
else
{
Log.DirectPrint("=============================");
Log.DirectPrint("Returning to the Last Virtual Machine.");
Log.DirectPrint("Machine = %i", FirstMachine.MachineIndex);
Log.DirectPrint("=============================");
FirstMachine.MachineIndex--;
_Executing = false;
LastMachine._Executing = true;
return;
}
}
#endregion
#region RETURN VALUE
else if (opcode == 0xC2)
{
Int16 VALUE = FileMemory.ReadInt16();
UpdateRegister();
Log.Info("RETN", "0x%lx", VALUE);
if (LastMachine == null)
{
Log.Info("Virtual Machine", "The Virtual Machine ended the current File.");
_Executing = false;
return;
}
else
{
Log.DirectPrint("=============================");
Log.DirectPrint("Returning to the Last Virtual Machine.");
Log.DirectPrint("Machine = %i", FirstMachine.MachineIndex);
Log.DirectPrint("=============================");
FirstMachine.MachineIndex--;
_Executing = false;
LastMachine._Executing = true;
return;
}
}
#endregion
#region INT3
else if (opcode == 0xCC)
{
UpdateRegister();
Log.Info("INT3", "");
_Executing = false;
}
#endregion
else
{
Log.Error("Virtual Machine", "0x%lx is a Unknown Byte at 0x%lx!", opcode, FileMemory.Position);
_Executing = false;
return;
}
}
}
private void Button_RTest(object sender, VirtualScreen e)
{
vme = new VM_Executor(@"E:\VisualStudios\VM\VM\bin\Debug\basic_test.compiled");
//auto run. :)
}
