public static void Disassemble(ManualLogSource logSource, IntPtr memoryPtr, int size)
{
var data = new byte[size];
Marshal.Copy(memoryPtr, data, 0, size);
var formatter = new NasmFormatter();
var output = new StringOutput();
var codeReader = new ByteArrayCodeReader(data);
var decoder = Decoder.Create(64, codeReader);
decoder.IP = (ulong)memoryPtr.ToInt64();
while (codeReader.CanReadByte)
{
decoder.Decode(out var instr);
formatter.Format(instr, output);
logSource.LogDebug($"{instr.IP:X16} {output.ToStringAndReset()}");
if (instr.Code == Code.Jmp_rm64 && instr.Immediate32 == 0
) // && instr.IsIPRelativeMemoryOperand && instr.IPRelativeMemoryAddress = 6
{
var address = new byte[8];
for (var i = 0; i < 8; i++)
{
address[i] = (byte)codeReader.ReadByte();
}
logSource.LogDebug($"{instr.IP + (ulong) instr.Length:X16} db 0x{BitConverter.ToUInt64(address, 0):X16}");
decoder.IP += 8;
}
}
}
void Test_ByteArrayCodeReader_ctor(ByteArrayCodeReader reader, byte[] expectedData)
{
int i = 0;
Assert.Equal(0, reader.Position);
while (reader.CanReadByte)
{
Assert.Equal(i, reader.Position);
Assert.True(i < expectedData.Length);
Assert.Equal(expectedData[i], reader.ReadByte());
i++;
}
Assert.Equal(i, reader.Position);
Assert.Equal(expectedData.Length, i);
Assert.Equal(-1, reader.ReadByte());
Assert.Equal(i, reader.Position);
reader.Position = 0;
Assert.Equal(0, reader.Position);
i = 0;
while (reader.CanReadByte)
{
Assert.Equal(i, reader.Position);
Assert.True(i < expectedData.Length);
Assert.Equal(expectedData[i], reader.ReadByte());
i++;
}
Assert.Equal(i, reader.Position);
Assert.Equal(expectedData.Length, i);
Assert.Equal(-1, reader.ReadByte());
Assert.Equal(i, reader.Position);
reader.Position = reader.Count;
Assert.Equal(reader.Count, reader.Position);
Assert.False(reader.CanReadByte);
Assert.Equal(-1, reader.ReadByte());
for (i = expectedData.Length - 1; i >= 0; i--)
{
reader.Position = i;
Assert.Equal(i, reader.Position);
Assert.True(reader.CanReadByte);
Assert.Equal(expectedData[i], reader.ReadByte());
Assert.Equal(i + 1, reader.Position);
}
Assert.Throws <ArgumentOutOfRangeException>(() => reader.Position = int.MinValue);
Assert.Throws <ArgumentOutOfRangeException>(() => reader.Position = -1);
Assert.Throws <ArgumentOutOfRangeException>(() => reader.Position = expectedData.Length + 1);
Assert.Throws <ArgumentOutOfRangeException>(() => reader.Position = int.MaxValue);
}
