Anonymous

from System.CodeDom import *from System.CodeDom.Compiler import CodeDomProvider, CodeGeneratorOptionsfrom System.IO import StringWriterimport System.String, System.Int16from Decoder import Decoderimport structARITH_ADD = CodeBinaryOperatorType.AddARITH_SUB = CodeBinaryOperatorType.SubtractARITH_MUL = CodeBinaryOperatorType.MultiplyARITH_DIV = CodeBinaryOperatorType.DivideARITH_XOR = '^'ARITH_LSL = '<<'ARITH_LSR = '>>'class DecompilerError(Exception):	passclass Decompiler(object):	def Opcode(OPCD, XO=0, branch=False):		def sub(func):			func.opcode = OPCD | (XO << 6)			func.branch = branch			return func		return sub		def __init__(self):		self.endian = '>'		self.decoder = Decoder()				self.handlers = {}		for name in dir(self):			attr = getattr(self, name)						if hasattr(attr, 'opcode'):				self.handlers[attr.opcode] = attr, attr.branch		def addStatements(self, method, stmts):		for stmt in stmts:			if hasattr(stmt, 'next'):				self.addStatements(method, stmt)			else:				method.Statements.Add(stmt)		def decompile(self, addr, memory):		self.addr = addr				method = CodeMemberMethod()		method.Name = 'Decompiled'		method.ReturnType = CodeTypeReference(System.String)		method.Attributes = MemberAttributes.Public				end = False		while not end:			try:				inst, = struct.unpack(self.endian + 'L', memory[addr:addr+4])			except (IndexError, struct.error):				break			self.addr += 4			stmts, end = self.handle(inst)			self.addStatements(method, stmts)				provider = CodeDomProvider.CreateProvider('CSharp')		options = CodeGeneratorOptions()		options.BracingStyle = 'Block'		writer = StringWriter()		provider.GenerateCodeFromMember(method, writer, options)		print writer.ToString()		writer.Close()		def handle(self, inst):		dec = self.decoder.decode(inst)				if dec[0] in self.handlers:			handler, branch = self.handlers[dec[0]]			return handler(*dec), branch		else:			raise DecompilerError('No handler for %r', dec)		def SIMM(self, SIMM):		if SIMM & 0x8000:			return -(0x10000 - SIMM)		else:			return SIMM		def arithmetic(self, oper, D, A, B=None, IMM=None):		D = CodeVariableReferenceExpression('r%i' % D)		if isinstance(oper, CodeBinaryOperatorType):			A = CodeVariableReferenceExpression('r%i' % A)						if B != None:				B = CodeVariableReferenceExpression('r%i' % B)			elif IMM != None:				B = CodePrimitiveExpression(System.Int16(IMM))						yield CodeAssignStatement(				D,				CodeBinaryOperatorExpression(					A,					oper,					B				)			)		else:			if B != None:				B = 'r%i' % B			elif IMM != None:				B = str(IMM)			yield CodeAssignStatement(				D,				CodeSnippetExpression(					'(r%i %s %s)' % (						A,						oper,						B					)				)			)		# Arithmetic	@Opcode(14)	def addi(self, OPCD, D, A, SIMM):		if A == 0:			yield CodeAssignStatement(				CodeVariableReferenceExpression('r%i' % D), 				CodePrimitiveExpression(System.Int16(self.SIMM(SIMM)))			)		else:			yield self.arithmetic(				ARITH_ADD,				D=D,				A=A,				IMM=self.SIMM(SIMM)			)		@Opcode(26)	def xori(self, OPCD, S, A, UIMM):		yield self.arithmetic(			ARITH_XOR,			D=A,			A=S,			IMM=UIMM		)		def branch(self, )		# Branches	@Opcode(18)	def bx(self, OPCD, LI, AA, LK):		passif __name__=='__main__':	decompiler = Decompiler()	decompiler.decompile(0, '\xde\xad\x39\x0e\xba\xbe\x02\x4e\xde\xad\x29\xda')