public static MSILInstruction Create(MSILOpCode opcode, uint metadataToken, NETHeader netHeader)
{
return(new MSILInstruction()
{
OpCode = opcode, OperandBytes = BitConverter.GetBytes(metadataToken), Operand = netHeader.TokenResolver.ResolveToken(metadataToken)
});
}
internal MSILInstruction(int offset, MSILOpCode opcode, byte[] rawOperand, object operand)
{
Offset = offset;
OpCode = opcode;
Operand = operand;
OperandBytes = rawOperand;
}
internal MSILInstruction(int offset, MSILOpCode opcode, byte[] rawOperand, object operand)
{
Offset = offset;
OpCode = opcode;
Operand = operand;
OperandBytes = rawOperand;
}
public static MSILInstruction Create(MSILOpCode opcode, object operand)
{
MSILInstruction instruction = new MSILInstruction()
{
OpCode = opcode,
Operand = operand,
};
return(instruction);
}
public MSILInstruction DisassembleNextInstruction()
{
int currentOffset = (int)(_reader.BaseStream.Position - _ilOffset);
//if (currentOffset == 0x64)
// System.Diagnostics.Debugger.Break();
MSILOpCode opcode = ReadNextOpCode();
byte[] rawoperand = ReadRawOperand(opcode);
object operand = ConvertToOperand(currentOffset, opcode, rawoperand);
return(new MSILInstruction(currentOffset, opcode, rawoperand, operand));
}
private byte[] ReadRawOperand(MSILOpCode opcode)
{
int size = opcode.Bytes.Length;
switch (opcode.OperandType)
{
case OperandType.Int8:
case OperandType.ShortArgument:
case OperandType.ShortInstructionTarget:
case OperandType.ShortVariable:
return(_reader.ReadBytes(1));
case OperandType.Argument:
case OperandType.Variable:
return(_reader.ReadBytes(2));
case OperandType.Field:
case OperandType.Int32:
case OperandType.Float32:
case OperandType.InstructionTarget:
case OperandType.Method:
case OperandType.Signature:
case OperandType.String:
case OperandType.Token:
case OperandType.Type:
return(_reader.ReadBytes(4));
case OperandType.Float64:
case OperandType.Int64:
return(_reader.ReadBytes(8));
case OperandType.InstructionTable:
byte[] header = _reader.ReadBytes(4);
byte[] offsets = _reader.ReadBytes(BitConverter.ToInt32(header, 0) * sizeof(int));
return(ASMGlobals.MergeBytes(header, offsets));
}
return(null);
}
private byte[] ReadRawOperand(MSILOpCode opcode)
{
int size = opcode.Bytes.Length;
switch (opcode.OperandType)
{
case OperandType.Int8:
case OperandType.ShortArgument:
case OperandType.ShortInstructionTarget:
case OperandType.ShortVariable:
return _reader.ReadBytes(1);
case OperandType.Argument:
case OperandType.Variable:
return _reader.ReadBytes(2);
case OperandType.Field:
case OperandType.Int32:
case OperandType.Float32:
case OperandType.InstructionTarget:
case OperandType.Method:
case OperandType.Signature:
case OperandType.String:
case OperandType.Token:
case OperandType.Type:
return _reader.ReadBytes(4);
case OperandType.Float64:
case OperandType.Int64:
return _reader.ReadBytes(8);
case OperandType.InstructionTable:
byte[] header = _reader.ReadBytes(4);
byte[] offsets = _reader.ReadBytes(BitConverter.ToInt32(header, 0) * sizeof(int));
return ASMGlobals.MergeBytes(header, offsets);
}
return null;
}
private object ConvertToOperand(int instructionOffset, MSILOpCode opcode, byte[] rawoperand)
{
try
{
switch (opcode.OperandType)
{
case OperandType.Argument:
ParameterDefinition paramDef = GetParameter(BitConverter.ToInt16(rawoperand, 0));
if (paramDef == null)
return BitConverter.ToInt16(rawoperand, 0);
return paramDef;
case OperandType.ShortArgument:
paramDef = GetParameter(rawoperand[0]);
if (paramDef == null)
return rawoperand[0];
return paramDef;
case OperandType.Float32:
return BitConverter.ToSingle(rawoperand, 0);
case OperandType.Float64:
return BitConverter.ToDouble(rawoperand, 0);
case OperandType.InstructionTable:
int length = BitConverter.ToInt32(rawoperand, 0);
int[] offsets = new int[length];
int nextOffset = instructionOffset + (length * 4) + opcode.Bytes.Length + 4;
for (int i = 0; i < length; i++)
{
int index = (i + 1) * sizeof(int);
int roffset = BitConverter.ToInt32(rawoperand, index);
offsets[i] = roffset + nextOffset;
}
return offsets;
case OperandType.InstructionTarget:
return BitConverter.ToInt32(rawoperand, 0) + instructionOffset + opcode.Bytes.Length + sizeof(int);
case OperandType.ShortInstructionTarget:
return ASMGlobals.ByteToSByte(rawoperand[0]) + instructionOffset + opcode.Bytes.Length + sizeof(byte);
case OperandType.Int8:
return ASMGlobals.ByteToSByte(rawoperand[0]);
case OperandType.Int32:
return BitConverter.ToInt32(rawoperand, 0);
case OperandType.Int64:
return BitConverter.ToInt64(rawoperand, 0);
case OperandType.Token:
case OperandType.Field:
case OperandType.Method:
case OperandType.Type:
uint metadata = BitConverter.ToUInt32(rawoperand, 0);
try
{
object operand = TokenResolver.ResolveMember(metadata);
if (operand is ISpecification)
operand = (operand as ISpecification).TransformWith(MethodBody.Method);
return operand;
}
catch { return new TypeReference(string.Empty, "TOKEN:" + metadata.ToString("X8"), null); }
case OperandType.ShortVariable:
VariableDefinition varDef = GetVariable(rawoperand[0]);
if (varDef == null)
return rawoperand[0];
return varDef;
case OperandType.Variable:
varDef = GetVariable(BitConverter.ToInt16(rawoperand, 0));
if (varDef == null)
return rawoperand[0];
return varDef;
case OperandType.Signature:
return BitConverter.ToInt32(rawoperand, 0);
case OperandType.String:
return TokenResolver.ResolveString(BitConverter.ToUInt32(rawoperand, 0));
}
}
catch { }
return null;
}
private object ConvertToOperand(int instructionOffset, MSILOpCode opcode, byte[] rawoperand)
{
try
{
switch (opcode.OperandType)
{
case OperandType.Argument:
ParameterDefinition paramDef = GetParameter(BitConverter.ToInt16(rawoperand, 0));
if (paramDef == null)
{
return(BitConverter.ToInt16(rawoperand, 0));
}
return(paramDef);
case OperandType.ShortArgument:
paramDef = GetParameter(rawoperand[0]);
if (paramDef == null)
{
return(rawoperand[0]);
}
return(paramDef);
case OperandType.Float32:
return(BitConverter.ToSingle(rawoperand, 0));
case OperandType.Float64:
return(BitConverter.ToDouble(rawoperand, 0));
case OperandType.InstructionTable:
int length = BitConverter.ToInt32(rawoperand, 0);
int[] offsets = new int[length];
int nextOffset = instructionOffset + (length * 4) + opcode.Bytes.Length + 4;
for (int i = 0; i < length; i++)
{
int index = (i + 1) * sizeof(int);
int roffset = BitConverter.ToInt32(rawoperand, index);
offsets[i] = roffset + nextOffset;
}
return(offsets);
case OperandType.InstructionTarget:
return(BitConverter.ToInt32(rawoperand, 0) + instructionOffset + opcode.Bytes.Length + sizeof(int));
case OperandType.ShortInstructionTarget:
return(ASMGlobals.ByteToSByte(rawoperand[0]) + instructionOffset + opcode.Bytes.Length + sizeof(byte));
case OperandType.Int8:
return(ASMGlobals.ByteToSByte(rawoperand[0]));
case OperandType.Int32:
return(BitConverter.ToInt32(rawoperand, 0));
case OperandType.Int64:
return(BitConverter.ToInt64(rawoperand, 0));
case OperandType.Token:
case OperandType.Field:
case OperandType.Method:
case OperandType.Type:
uint metadata = BitConverter.ToUInt32(rawoperand, 0);
try
{
object operand = TokenResolver.ResolveMember(metadata);
if (operand is ISpecification)
{
operand = (operand as ISpecification).TransformWith(MethodBody.Method);
}
return(operand);
}
catch { return(new TypeReference(string.Empty, "TOKEN:" + metadata.ToString("X8"), null)); }
case OperandType.ShortVariable:
VariableDefinition varDef = GetVariable(rawoperand[0]);
if (varDef == null)
{
return(rawoperand[0]);
}
return(varDef);
case OperandType.Variable:
varDef = GetVariable(BitConverter.ToInt16(rawoperand, 0));
if (varDef == null)
{
return(rawoperand[0]);
}
return(varDef);
case OperandType.Signature:
return(BitConverter.ToInt32(rawoperand, 0));
case OperandType.String:
return(TokenResolver.ResolveString(BitConverter.ToUInt32(rawoperand, 0)));
}
}
catch { }
return(null);
}
public static MSILInstruction Create(MSILOpCode opcode, uint metadataToken, NETHeader netHeader)
{
return new MSILInstruction() { OpCode = opcode, OperandBytes = BitConverter.GetBytes(metadataToken), Operand = netHeader.TokenResolver.ResolveToken(metadataToken) };
}
public static MSILInstruction Create(MSILOpCode opcode, object operand)
{
MSILInstruction instruction = new MSILInstruction()
{
OpCode = opcode,
Operand = operand,
};
return instruction;
}
