public static X86Disassembler CreateDisassemblerFromRVA(this Executables exe, long rva)
{
var asm = exe.Assembly;
var reader = asm.ReadingContext.Reader.CreateSubReader(asm.RvaToFileOffset(rva));
var sec = asm.GetSectionHeaderByRva(rva);
var dis = new AsmResolver.X86.X86Disassembler(reader, exe.BaseAddress + sec.VirtualAddress - sec.PointerToRawData);
return(dis);
}
public void SetCurrentFrame(IFrame currentFrame)
{
if (currentFrame == null || currentFrame.Function != _lastFunction)
{
instructionsListView.Items.Clear();
_lastFunction = null;
}
if (currentFrame != null)
{
if (currentFrame.Function == _lastFunction)
{
foreach (var item in instructionsListView.Items.Cast<X86InstructionListViewItem>())
item.UpdateItem(currentFrame);
}
else
{
_lastFunction = currentFrame.Function;
var code = ((RuntimeFunction) currentFrame.Function).NativeCode;
var mapping = code.GetILToNativeMapping().ToArray();
var bytes = code.GetBytes();
var reader = new MemoryStreamReader(bytes);
var disassembler = new X86Disassembler(reader, (long) code.Address);
while (reader.Position < reader.StartPosition + reader.Length)
{
try
{
int start = (int) reader.Position;
var instruction = disassembler.ReadNextInstruction();
int end = (int) reader.Position;
var instructionBytes = new byte[end - start];
Buffer.BlockCopy(bytes, start, instructionBytes, 0, end - start);
var item = new X86InstructionListViewItem(instruction, instructionBytes);
item.RelativeOffset = start;
item.Mapping = mapping.FirstOrDefault(
x => item.RelativeOffset >= x.NativeStartOffset
&& item.RelativeOffset < x.NativeEndOffset);
item.UpdateItem(currentFrame);
instructionsListView.Items.Add(item);
}
catch (IndexOutOfRangeException)
{
// HACK: ignore mnemonic choosing errors in disassembler
}
}
}
}
}
private static void TestDisassembler(byte[] code, string source)
{
var reader = new MemoryStreamReader(code);
var disassembler = new X86Disassembler(reader);
var sourceLines = NormalizeSource(source).Split('\n');
var currentLine = 0;
while (reader.Position < reader.Length)
{
var instruction = disassembler.ReadNextInstruction();
var formattedInstruction = _formatter.FormatInstruction(instruction);
Assert.AreEqual(sourceLines[currentLine], formattedInstruction);
currentLine++;
}
}
private static void TestSizeComputation(byte[] opcodes)
{
var reader = new MemoryStreamReader(opcodes);
var disassembler = new X86Disassembler(reader);
while (reader.Position < reader.Length)
{
var instruction = disassembler.ReadNextInstruction();
var expectedSize = reader.Position - instruction.Offset;
var computeSize = instruction.ComputeSize();
if (expectedSize != computeSize)
Assert.Fail("The instruction {0} has size {1}, but {2} was computed.", instruction, expectedSize,
computeSize);
}
}
private static void ValidateCode(IReadOnlyList<X86Instruction> originalBody, byte[] assemblerOutput)
{
var formatter = new FasmX86Formatter();
var reader = new MemoryStreamReader(assemblerOutput);
var disassembler = new X86Disassembler(reader);
for (int i = 0; i < originalBody.Count; i++)
{
var newInstruction = disassembler.ReadNextInstruction();
Assert.AreEqual(formatter.FormatInstruction(originalBody[i]),
formatter.FormatInstruction(newInstruction));
}
}
