public KoiEmulator(RhydonContext ctx, MethodExport export)
{
_emuCtx = new EmuContext(ctx, export);
ctx.Reader.BaseStream.Position = export.Offset;
foreach (var h in typeof(KoiEmulator).Assembly.DefinedTypes
.Where(t => !t.IsAbstract && typeof(KoiHandler).IsAssignableFrom(t))
.Select(ha => Activator.CreateInstance(ha, _emuCtx)).Cast <KoiHandler>().ToArray())
{
_emuCtx.Handlers[h.Handles] = h;
}
foreach (var v in typeof(KoiEmulator).Assembly.DefinedTypes
.Where(t => !t.IsAbstract && typeof(VCallHandler).IsAssignableFrom(t))
.Select(ha => Activator.CreateInstance(ha, _emuCtx)).Cast <VCallHandler>().ToArray())
{
_emuCtx.VCallHandlers[v.VCall] = v;
}
ctx.Logger.Info($"Emulating virtualized method at offset: 0x{export.Offset:X8}");
_emuCtx.Registers[ctx.Constants.REG_K1] = new VMSlot {
U4 = export.Key
};
_emuCtx.Registers[ctx.Constants.REG_BP] = new VMSlot {
U4 = 0
};
_emuCtx.Registers[ctx.Constants.REG_SP] = new VMSlot {
U4 = (uint)(export.ArgumentTypes.Length + 1)
};
_emuCtx.Registers[ctx.Constants.REG_IP] = new VMSlot {
U8 = (ulong)ctx.Reader.BaseStream.Position
};
}
public static byte ReadKoiByte(this BinaryReader reader, MethodExport sig)
{
var b = (byte)(reader.ReadInt64() ^ sig.Key);
reader.BaseStream.Position -= 7;
sig.Key = sig.Key * 7 + b;
return(b);
}
internal EmuContext(RhydonContext ctx, MethodExport exp)
{
Export = exp;
MethodBody = new List <KoiInstruction>();
Stack = new Stack <VMSlot>();
Registers = new VMSlot[16];
Handlers = new Dictionary <byte, KoiHandler>();
VCallHandlers = new Dictionary <byte, VCallHandler>();
Module = ctx.Module;
Reader = ctx.Reader;
Header = ctx.Header;
StartOffset = ctx.StartOffset;
Constants = ctx.Constants;
Decompiled = ctx.Decompiled;
Logger = ctx.Logger;
Parameters = ctx.Parameters;
}