public static OpCode DecodeOpCode(IMemoryManager memory, ulong address, ExecutionMode mode)
{
int opCode = memory.Read <int>(address);
InstDescriptor inst;
OpCodeTable.MakeOp makeOp;
if (mode == ExecutionMode.Aarch64)
{
(inst, makeOp) = OpCodeTable.GetInstA64(opCode);
}
else
{
if (mode == ExecutionMode.Aarch32Arm)
{
(inst, makeOp) = OpCodeTable.GetInstA32(opCode);
}
else /* if (mode == ExecutionMode.Aarch32Thumb) */
{
(inst, makeOp) = OpCodeTable.GetInstT32(opCode);
}
}
if (makeOp != null)
{
return((OpCode)makeOp(inst, address, opCode));
}
else
{
return(new OpCode(inst, address, opCode));
}
}
public IntPtr Apply(IMemoryManager memory, IntPtr address)
{
switch (Type)
{
case LeaType.Byte:
return((IntPtr)memory.Read <byte>(address));
case LeaType.Word:
return((IntPtr)memory.Read <ushort>(address));
case LeaType.Dword:
return((IntPtr)memory.Read <uint>(address));
case LeaType.E8:
// 4 = <call instruction size> - <E8>
return(address + 4 + memory.Read <int>(address));
case LeaType.SimpleAddress:
return(address);
case LeaType.Cmp:
return(address + 5 + memory.Read <int>(address));
case LeaType.RelativePlus8:
return(address + 8 + memory.Read <int>(address));
default:
throw new InvalidDataException("Unknown " + nameof(LeaType));
}
}
