Exemplo n.º 1
0
    def print_inst(self, i, tab=0, prefix=""):
        def get_inst_str():
            nonlocal i
            return "%s %s" % (i.mnemonic, i.op_str)

        if isinstance(i, NopInst):
            return

        if isinstance(i, PseudoInst):
            for i2 in i.real_inst_list:
                self.print_inst(i2, tab, "# ")
            print_label_and_addr(i.real_inst_list[0].address, tab)
            print(i.pseudo)
            return

        if i.address in self.ctx.dis.previous_comments:
            for comm in self.ctx.dis.previous_comments[i.address]:
                print_tabbed(color_intern_comment("; %s" % comm), tab)

        if prefix == "# ":
            if self.ctx.comments:
                if i.address in self.ctx.labels:
                    print_label(i.address, tab)
                    print()
                print_comment_no_end(prefix, tab)
                print_addr(i.address)
                self.print_bytes(i, True)
                print_comment(get_inst_str())
            return

        if i.address in self.ctx.all_fused_inst:
            return

        if self.is_symbol(i.address):
            print_tabbed_no_end("", tab)
            self.print_symbol(i.address)
            print()

        print_label_and_addr(i.address, tab)

        self.print_bytes(i)

        if is_ret(i):
            print(color_retcall(get_inst_str()))
            return

        if is_call(i):
            print_no_end(color_retcall(i.mnemonic) + " ")
            modified = self.print_operand(i, 0, hexa=True)
            if modified and self.ctx.comments:
                print_comment_no_end(" # " + get_inst_str())
            print()
            return

        # Here we can have conditional jump with the option --dump
        if is_jump(i):
            print_no_end(i.mnemonic + " ")
            if i.operands[-1].type != MIPS_OP_IMM:
                print_no_end(i.op_str)
                if is_uncond_jump(i) and self.ctx.comments and not self.ctx.dump \
                        and not i.address in self.ctx.dis.jmptables:
                    print_comment_no_end(" # STOPPED")
                print()
                return

            for num in range(len(i.operands)-1):
                self.print_operand(i, num)
                print_no_end(", ")

            addr = i.operands[0].value.imm
            if addr in self.ctx.addr_color:
                print_label_or_addr(addr, -1, False)
            else:
                print_no_end(hex(addr))
            print()
            return


        modified = False

        if i.id in LD_CHECK:
            self.print_operand(i, 0)
            print_no_end(" = (")
            print_no_end(color_type(LD_TYPE[i.id]))
            print_no_end(") ")
            self.print_operand(i, 1)
            modified = True

        elif i.id in ST_CHECK:
            self.print_operand(i, 1)
            print_no_end(" = (")
            print_no_end(color_type(ST_TYPE[i.id]))
            print_no_end(") ")
            self.print_operand(i, 0)
            modified = True

        elif i.id in INST_CHECK:
            if i.id == MIPS_INS_LUI:
                print_no_end("(load upper) ")
                self.print_operand(i, 0)
                print_no_end(" = ")
                self.print_operand(i, 1)

            elif i.id == MIPS_INS_MOVE:
                self.print_operand(i, 0)
                print_no_end(" = ")
                if i.operands[1].value.reg == MIPS_REG_ZERO:
                    print_no_end("0")
                else:
                    self.print_operand(i, 1)

            else:
                self.print_operand(i, 0)
                if i.operands[0].type == i.operands[1].type == MIPS_OP_REG and \
                    i.operands[0].value.reg == i.operands[1].value.reg:
                    print_no_end(" " + inst_symbol(i) + "= ")
                else:
                    print_no_end(" = ")
                    self.print_operand(i, 1)
                    print_no_end(" " + inst_symbol(i) + " ")
                self.print_operand(i, 2)

            modified = True

        else:
            print_no_end("%s " % i.mnemonic)
            if len(i.operands) > 0:
                modified = self.print_operand(i, 0)
                k = 1
                while k < len(i.operands):
                    print_no_end(", ")
                    modified |= self.print_operand(i, k)
                    k += 1

        if i.address in self.ctx.dis.inline_comments:
            print_no_end(color_intern_comment(" ; "))
            print_no_end(color_intern_comment(self.ctx.dis.inline_comments[i.address]))

        if modified and self.ctx.comments:
            print_comment_no_end(" # " + get_inst_str())

        print()
Exemplo n.º 2
0
    def print_inst(self, i, tab=0, prefix=""):
        def get_inst_str():
            nonlocal i
            return "%s %s" % (i.mnemonic, i.op_str)

        if i.address in self.ctx.dis.previous_comments:
            for comm in self.ctx.dis.previous_comments[i.address]:
                print_tabbed(color_intern_comment("; %s" % comm), tab)

        if prefix == "# ":
            if self.ctx.comments:
                if i.address in self.ctx.labels:
                    print_label(i.address, tab)
                    print()
                print_comment_no_end(prefix, tab)
                print_addr(i.address)
                self.print_bytes(i, True)
                print_comment(get_inst_str())
            return

        if i.address in self.ctx.all_fused_inst:
            return

        if self.is_symbol(i.address):
            print_tabbed_no_end("", tab)
            self.print_symbol(i.address)
            print()

        print_label_and_addr(i.address, tab)

        self.print_bytes(i)

        if is_ret(i):
            print(color_retcall(get_inst_str()))
            return

        if is_call(i):
            print_no_end(color_retcall(i.mnemonic) + " ")
            modified = self.print_operand(i, 0, hexa=True)
            if modified and self.ctx.comments:
                print_comment_no_end(" # " + get_inst_str())
            print()
            return

        # Here we can have conditional jump with the option --dump
        if is_jump(i):
            print_no_end(i.mnemonic + " ")
            if i.operands[0].type != ARM_OP_IMM:
                print_no_end(i.op_str)
                if is_uncond_jump(i) and self.ctx.comments and not self.ctx.dump \
                        and not i.address in self.ctx.dis.jmptables:
                    print_comment_no_end(" # STOPPED")
                print()
                return
            addr = i.operands[0].value.imm
            if addr in self.ctx.addr_color:
                print_label_or_addr(addr, -1, False)
            else:
                print_no_end(hex(addr))
            print()
            return


        modified = False

        if i.id in LDR_CHECK:
            self.print_operand(i, 0)
            print_no_end(" = (")
            print_no_end(color_type(LDR_TYPE[i.id]))
            print_no_end(") ")
            self.print_operand(i, 1)
            modified = True

        elif i.id in STR_CHECK:
            self.print_operand(i, 1)
            print_no_end(" = (")
            print_no_end(color_type(STR_TYPE[i.id]))
            print_no_end(") ")
            self.print_operand(i, 0)
            modified = True

        elif i.id in INST_CHECK:
            self.print_operand(i, 0)

            if i.id == ARM_INS_CMP:
                print_no_end(" " + inst_symbol(i) + " ")
                self.print_operand(i, 1)

            else:
                print_no_end(" = ")
                self.print_operand(i, 1)
                if len(i.operands) == 3:
                    print_no_end(" " + inst_symbol(i) + " ")
                    self.print_operand(i, 2)

            modified = True

        else:
            print_no_end("%s " % i.mnemonic)
            if len(i.operands) > 0:
                modified = self.print_operand(i, 0)
                k = 1
                while k < len(i.operands):
                    print_no_end(", ")
                    modified |= self.print_operand(i, k)
                    k += 1

        if i.update_flags and i.id != ARM_INS_CMP and i.id != ARM_INS_TST:
            print_no_end(color_type(" (FLAGS)"))

        if i.address in self.ctx.dis.inline_comments:
            print_no_end(color_intern_comment(" ; "))
            print_no_end(color_intern_comment(self.ctx.dis.inline_comments[i.address]))

        if modified and self.ctx.comments:
            print_comment_no_end(" # " + get_inst_str())

        print()
Exemplo n.º 3
0
    def __print_inst(self, i, tab=0, prefix=""):
        def get_inst_str():
            nonlocal i
            return "%s %s" % (i.mnemonic, i.op_str)

        def print_rep_begin():
            nonlocal tab
            if i.prefix[0] in REP_PREFIX:
                print_tabbed_no_end(color_keyword("while"), tab)
                # TODO: for 16 and 32 bits
                print_no_end(" (!rcx)")
                print(") {")
                tab += 1

        def print_rep_end():
            nonlocal tab
            if i.prefix[0] in REP_PREFIX:
                print()
                print_label_or_addr(i.address, tab)
                print("rcx--")
                if i.prefix[0] == X86_PREFIX_REPNE:
                    print_tabbed_no_end(color_keyword("if"), tab)
                    print_no_end(" (!Z) ")
                    print(color_keyword("break"))
                tab -= 1
                print_tabbed_no_end("}", tab)

        print_rep_begin()

        print_label_and_addr(i.address, tab)

        self.print_bytes(i)

        if is_ret(i):
            print_no_end(color_retcall(get_inst_str()))
            return

        if is_call(i):
            print_no_end(color_retcall(i.mnemonic) + " ")
            return self.print_operand(i, 0, hexa=True)

        # Here we can have conditional jump with the option --dump
        if is_jump(i):
            print_no_end(i.mnemonic + " ")
            if i.operands[0].type != X86_OP_IMM:
                self.print_operand(i, 0)
                if is_uncond_jump(i) and self.ctx.comments and not self.ctx.dump \
                        and not i.address in self.ctx.dis.jmptables:
                    print_comment_no_end(" # STOPPED")
                return
            addr = i.operands[0].value.imm
            if addr in self.ctx.addr_color:
                print_label_or_addr(addr, -1, False)
            else:
                print_no_end(hex(addr))
            return


        modified = False

        if i.id in INST_CHECK:
            if (i.id == X86_INS_OR and i.operands[1].type == X86_OP_IMM and
                    i.operands[1].value.imm == -1):
                self.print_operand(i, 0)
                print_no_end(" = -1")

            elif (i.id == X86_INS_AND and i.operands[1].type == X86_OP_IMM and
                    i.operands[1].value.imm == 0):
                self.print_operand(i, 0)
                print_no_end(" = 0")

            elif (all(op.type == X86_OP_REG for op in i.operands) and
                    len(set(op.value.reg for op in i.operands)) == 1 and
                    i.id == X86_INS_XOR):
                self.print_operand(i, 0)
                print_no_end(" = 0")

            elif i.id == X86_INS_INC or i.id == X86_INS_DEC:
                self.print_operand(i, 0)
                print_no_end(inst_symbol(i))

            elif i.id == X86_INS_LEA:
                self.print_operand(i, 0)
                print_no_end(" = &(")
                self.print_operand(i, 1)
                print_no_end(")")

            elif i.id == X86_INS_MOVZX:
                self.print_operand(i, 0)
                print_no_end(" = (zero ext) ")
                self.print_operand(i, 1)

            elif i.id == X86_INS_IMUL:
                if len(i.operands) == 3:
                    self.print_operand(i, 0)
                    print_no_end(" = ")
                    self.print_operand(i, 1)
                    print_no_end(" " + inst_symbol(i).rstrip('=') + " ")
                    self.print_operand(i, 2)
                elif len(i.operands) == 2:
                    self.print_operand(i, 0)
                    print_no_end(" " + inst_symbol(i) + " ")
                    self.print_operand(i, 1)
                elif len(i.operands) == 1:
                    sz = i.operands[0].size
                    if sz == 1:
                        print_no_end("ax = al * ")
                    elif sz == 2:
                        print_no_end("dx:ax = ax * ")
                    elif sz == 4:
                        print_no_end("edx:eax = eax * ")
                    elif sz == 8:
                        print_no_end("rdx:rax = rax * ")
                    self.print_operand(i, 0)

            else:
                self.print_operand(i, 0)
                print_no_end(" " + inst_symbol(i) + " ")
                self.print_operand(i, 1)

            modified = True

        elif i.id == X86_INS_CDQE:
            print_no_end("rax = eax")
            modified = True

        elif i.id == X86_INS_IDIV:
            print_no_end('eax = edx:eax / ')
            self.print_operand(i, 0)
            print_no_end('; edx = edx:eax % ')
            self.print_operand(i, 0)
            modified = True

        elif i.id == X86_INS_MUL:
            lut = {1: ("al", "ax"), 2: ("ax", "dx:ax"), 4: ("eax", "edx:eax"),
                    8: ("rax", "rdx:rax")}
            src, dst = lut[i.operands[0].size]
            print_no_end('{0} = {1} * '.format(dst, src))
            self.print_operand(i, 0)
            modified = True

        elif i.id == X86_INS_NOT:
            self.print_operand(i, 0)
            print_no_end(' ^= -1')
            modified = True

        elif i.id in INST_SCAS:
            self.print_operand(i, 0)
            print_no_end(" cmp ")
            self.print_operand(i, 1)
            print()
            print_label_or_addr(i.address, tab)
            self.print_operand(i, 1, show_deref=False)
            print_no_end(" += D")
            modified = True

        elif i.id in INST_STOS:
            self.print_operand(i, 0)
            print_no_end(" = ")
            self.print_operand(i, 1)
            print()
            print_label_or_addr(i.address, tab)
            self.print_operand(i, 0, show_deref=False)
            print_no_end(" += D")
            modified = True

        elif i.id in INST_LODS:
            self.print_operand(i, 0)
            print_no_end(" = ")
            self.print_operand(i, 1)
            print()
            print_label_or_addr(i.address, tab)
            self.print_operand(i, 1, show_deref=False)
            print_no_end(" += D")
            modified = True

        elif i.id in INST_CMPS:
            self.print_operand(i, 0)
            print_no_end(" cmp ")
            self.print_operand(i, 1)
            print()
            print_label_or_addr(i.address, tab)
            self.print_operand(i, 0, show_deref=False)
            print(" += D")
            print_label_or_addr(i.address, tab)
            self.print_operand(i, 1, show_deref=False)
            print_no_end("' += D")
            modified = True

        elif i.id in INST_MOVS:
            self.print_operand(i, 0)
            print_no_end(" = ")
            self.print_operand(i, 1)
            print()
            print_label_or_addr(i.address, tab)
            self.print_operand(i, 0, show_deref=False)
            print(" += D")
            print_label_or_addr(i.address, tab)
            self.print_operand(i, 1, show_deref=False)
            print_no_end(" += D")
            modified = True

        else:
            print_no_end("%s " % i.mnemonic)
            if len(i.operands) > 0:
                modified = self.print_operand(i, 0)
                k = 1
                while k < len(i.operands):
                    print_no_end(", ")
                    modified |= self.print_operand(i, k)
                    k += 1

        print_rep_end()

        return modified
Exemplo n.º 4
0
    def print_inst(self, i, tab=0, prefix=""):
        def get_inst_str():
            nonlocal i
            return "%s %s" % (i.mnemonic, i.op_str)

        if isinstance(i, NopInst):
            return

        if isinstance(i, PseudoInst):
            for i2 in i.real_inst_list:
                self.print_inst(i2, tab, "# ")
            print_label_and_addr(i.real_inst_list[0].address, tab)
            print(i.pseudo)
            return

        if i.address in self.ctx.dis.previous_comments:
            for comm in self.ctx.dis.previous_comments[i.address]:
                print_tabbed(color_intern_comment("; %s" % comm), tab)

        if prefix == "# ":
            if self.ctx.comments:
                if i.address in self.ctx.labels:
                    print_label(i.address, tab)
                    print()
                print_comment_no_end(prefix, tab)
                print_addr(i.address)
                self.print_bytes(i, True)
                print_comment(get_inst_str())
            return

        if i.address in self.ctx.all_fused_inst:
            return

        if self.is_symbol(i.address):
            print_tabbed_no_end("", tab)
            self.print_symbol(i.address)
            print()

        print_label_and_addr(i.address, tab)

        self.print_bytes(i)

        if is_ret(i):
            print(color_retcall(get_inst_str()))
            return

        if is_call(i):
            print_no_end(color_retcall(i.mnemonic) + " ")
            modified = self.print_operand(i, 0, hexa=True)
            if modified and self.ctx.comments:
                print_comment_no_end(" # " + get_inst_str())
            print()
            return

        # Here we can have conditional jump with the option --dump
        if is_jump(i):
            print_no_end(i.mnemonic + " ")
            if i.operands[-1].type != MIPS_OP_IMM:
                print_no_end(i.op_str)
                if is_uncond_jump(i) and self.ctx.comments and not self.ctx.dump \
                        and not i.address in self.ctx.dis.jmptables:
                    print_comment_no_end(" # STOPPED")
                print()
                return

            for num in range(len(i.operands) - 1):
                self.print_operand(i, num)
                print_no_end(", ")

            addr = i.operands[0].value.imm
            if addr in self.ctx.addr_color:
                print_label_or_addr(addr, -1, False)
            else:
                print_no_end(hex(addr))
            print()
            return

        modified = False

        if i.id in LD_CHECK:
            self.print_operand(i, 0)
            print_no_end(" = (")
            print_no_end(color_type(LD_TYPE[i.id]))
            print_no_end(") ")
            self.print_operand(i, 1)
            modified = True

        elif i.id in ST_CHECK:
            self.print_operand(i, 1)
            print_no_end(" = (")
            print_no_end(color_type(ST_TYPE[i.id]))
            print_no_end(") ")
            self.print_operand(i, 0)
            modified = True

        elif i.id in INST_CHECK:
            if i.id == MIPS_INS_LUI:
                print_no_end("(load upper) ")
                self.print_operand(i, 0)
                print_no_end(" = ")
                self.print_operand(i, 1)

            elif i.id == MIPS_INS_MOVE:
                self.print_operand(i, 0)
                print_no_end(" = ")
                if i.operands[1].value.reg == MIPS_REG_ZERO:
                    print_no_end("0")
                else:
                    self.print_operand(i, 1)

            else:
                self.print_operand(i, 0)
                if i.operands[0].type == i.operands[1].type == MIPS_OP_REG and \
                    i.operands[0].value.reg == i.operands[1].value.reg:
                    print_no_end(" " + inst_symbol(i) + "= ")
                else:
                    print_no_end(" = ")
                    self.print_operand(i, 1)
                    print_no_end(" " + inst_symbol(i) + " ")
                self.print_operand(i, 2)

            modified = True

        else:
            print_no_end("%s " % i.mnemonic)
            if len(i.operands) > 0:
                modified = self.print_operand(i, 0)
                k = 1
                while k < len(i.operands):
                    print_no_end(", ")
                    modified |= self.print_operand(i, k)
                    k += 1

        if i.address in self.ctx.dis.inline_comments:
            print_no_end(color_intern_comment(" ; "))
            print_no_end(
                color_intern_comment(self.ctx.dis.inline_comments[i.address]))

        if modified and self.ctx.comments:
            print_comment_no_end(" # " + get_inst_str())

        print()
Exemplo n.º 5
0
    def print_inst(self, i, tab=0, prefix=""):
        def get_inst_str():
            nonlocal i
            return "%s %s" % (i.mnemonic, i.op_str)

        if prefix == "# ":
            if self.ctx.comments:
                if i.address in self.ctx.labels:
                    print_label(i.address, tab)
                    print()
                print_comment_no_end(prefix, tab)
                print_addr(i.address)
                self.print_bytes(i, True)
                print_comment(get_inst_str())
            return

        if i.address in self.ctx.all_fused_inst:
            return

        if self.is_symbol(i.address):
            print_tabbed_no_end("", tab)
            self.print_symbol(i.address)
            print()

        print_label_and_addr(i.address, tab)

        self.print_bytes(i)

        if is_ret(i):
            print(color_retcall(get_inst_str()))
            return

        if is_call(i):
            print_no_end(color_retcall(i.mnemonic) + " ")
            modified = self.print_operand(i, 0, hexa=True)
            if modified and self.ctx.comments:
                print_comment_no_end(" # " + get_inst_str())
            print()
            return

        # Here we can have conditional jump with the option --dump
        if is_jump(i):
            print_no_end(i.mnemonic + " ")
            if i.operands[0].type != ARM_OP_IMM:
                print_no_end(i.op_str)
                if is_uncond_jump(
                        i) and self.ctx.comments and not self.ctx.dump:
                    print_comment_no_end(" # STOPPED")
                print()
                return
            addr = i.operands[0].value.imm
            if addr in self.ctx.addr_color:
                print_label_or_addr(addr, -1, False)
            else:
                print_no_end(hex(addr))
            print()
            return

        modified = False

        if i.id in LDR_CHECK:
            self.print_operand(i, 0)
            print_no_end(" = (")
            print_no_end(color_type(LDR_TYPE[i.id]))
            print_no_end(") ")
            self.print_operand(i, 1)
            modified = True

        elif i.id in STR_CHECK:
            self.print_operand(i, 1)
            print_no_end(" = (")
            print_no_end(color_type(STR_TYPE[i.id]))
            print_no_end(") ")
            self.print_operand(i, 0)
            modified = True

        elif i.id in INST_CHECK:
            self.print_operand(i, 0)

            if i.id == ARM_INS_CMP:
                print_no_end(" " + inst_symbol(i) + " ")
                self.print_operand(i, 1)

            else:
                print_no_end(" = ")
                self.print_operand(i, 1)
                if len(i.operands) == 3:
                    print_no_end(" " + inst_symbol(i) + " ")
                    self.print_operand(i, 2)

            modified = True

        else:
            print_no_end("%s " % i.mnemonic)
            if len(i.operands) > 0:
                modified = self.print_operand(i, 0)
                k = 1
                while k < len(i.operands):
                    print_no_end(", ")
                    modified |= self.print_operand(i, k)
                    k += 1

        if i.update_flags and i.id != ARM_INS_CMP and i.id != ARM_INS_TST:
            print_no_end(color_type(" (FLAGS)"))

        if modified and self.ctx.comments:
            print_comment_no_end(" # " + get_inst_str())

        print()
Exemplo n.º 6
0
    def __print_inst(self, i, tab=0, prefix=""):
        def get_inst_str():
            nonlocal i
            return "%s %s" % (i.mnemonic, i.op_str)

        def print_rep_begin():
            nonlocal tab
            if i.prefix[0] in REP_PREFIX:
                print_tabbed_no_end(color_keyword("while"), tab)
                # TODO: for 16 and 32 bits
                print_no_end(" (!rcx)")
                print(") {")
                tab += 1

        def print_rep_end():
            nonlocal tab
            if i.prefix[0] in REP_PREFIX:
                print()
                print_label_or_addr(i.address, tab)
                print("rcx--")
                if i.prefix[0] == X86_PREFIX_REPNE:
                    print_tabbed_no_end(color_keyword("if"), tab)
                    print_no_end(" (!Z) ")
                    print(color_keyword("break"))
                tab -= 1
                print_tabbed_no_end("}", tab)

        print_rep_begin()

        print_label_and_addr(i.address, tab)

        self.print_bytes(i)

        if is_ret(i):
            print_no_end(color_retcall(get_inst_str()))
            return

        if is_call(i):
            print_no_end(color_retcall(i.mnemonic) + " ")
            return self.print_operand(i, 0, hexa=True)

        # Here we can have conditional jump with the option --dump
        if is_jump(i):
            print_no_end(i.mnemonic + " ")
            if i.operands[0].type != X86_OP_IMM:
                self.print_operand(i, 0)
                if is_uncond_jump(
                        i) and self.ctx.comments and not self.ctx.dump:
                    print_comment_no_end(" # STOPPED")
                return
            addr = i.operands[0].value.imm
            if addr in self.ctx.addr_color:
                print_label_or_addr(addr, -1, False)
            else:
                print_no_end(hex(addr))
            return

        modified = False

        if i.id in INST_CHECK:
            if (i.id == X86_INS_OR and i.operands[1].type == X86_OP_IMM
                    and i.operands[1].value.imm == -1):
                self.print_operand(i, 0)
                print_no_end(" = -1")

            elif (i.id == X86_INS_AND and i.operands[1].type == X86_OP_IMM
                  and i.operands[1].value.imm == 0):
                self.print_operand(i, 0)
                print_no_end(" = 0")

            elif (all(op.type == X86_OP_REG for op in i.operands)
                  and len(set(op.value.reg for op in i.operands)) == 1
                  and i.id == X86_INS_XOR):
                self.print_operand(i, 0)
                print_no_end(" = 0")

            elif i.id == X86_INS_INC or i.id == X86_INS_DEC:
                self.print_operand(i, 0)
                print_no_end(inst_symbol(i))

            elif i.id == X86_INS_LEA:
                self.print_operand(i, 0)
                print_no_end(" = &(")
                self.print_operand(i, 1)
                print_no_end(")")

            elif i.id == X86_INS_MOVZX:
                self.print_operand(i, 0)
                print_no_end(" = (zero ext) ")
                self.print_operand(i, 1)

            elif i.id == X86_INS_IMUL:
                if len(i.operands) == 3:
                    self.print_operand(i, 0)
                    print_no_end(" = ")
                    self.print_operand(i, 1)
                    print_no_end(" " + inst_symbol(i).rstrip('=') + " ")
                    self.print_operand(i, 2)
                elif len(i.operands) == 2:
                    self.print_operand(i, 0)
                    print_no_end(" " + inst_symbol(i) + " ")
                    self.print_operand(i, 1)
                elif len(i.operands) == 1:
                    sz = i.operands[0].size
                    if sz == 1:
                        print_no_end("ax = al * ")
                    elif sz == 2:
                        print_no_end("dx:ax = ax * ")
                    elif sz == 4:
                        print_no_end("edx:eax = eax * ")
                    elif sz == 8:
                        print_no_end("rdx:rax = rax * ")
                    self.print_operand(i, 0)

            else:
                self.print_operand(i, 0)
                print_no_end(" " + inst_symbol(i) + " ")
                self.print_operand(i, 1)

            modified = True

        elif i.id == X86_INS_CDQE:
            print_no_end("rax = eax")
            modified = True

        elif i.id == X86_INS_IDIV:
            print_no_end('eax = edx:eax / ')
            self.print_operand(i, 0)
            print_no_end('; edx = edx:eax % ')
            self.print_operand(i, 0)
            modified = True

        elif i.id == X86_INS_MUL:
            lut = {
                1: ("al", "ax"),
                2: ("ax", "dx:ax"),
                4: ("eax", "edx:eax"),
                8: ("rax", "rdx:rax")
            }
            src, dst = lut[i.operands[0].size]
            print_no_end('{0} = {1} * '.format(dst, src))
            self.print_operand(i, 0)
            modified = True

        elif i.id == X86_INS_NOT:
            self.print_operand(i, 0)
            print_no_end(' ^= -1')
            modified = True

        elif i.id in INST_SCAS:
            self.print_operand(i, 0)
            print_no_end(" cmp ")
            self.print_operand(i, 1)
            print()
            print_label_or_addr(i.address, tab)
            self.print_operand(i, 1, show_deref=False)
            print_no_end(" += D")
            modified = True

        elif i.id in INST_STOS:
            self.print_operand(i, 0)
            print_no_end(" = ")
            self.print_operand(i, 1)
            print()
            print_label_or_addr(i.address, tab)
            self.print_operand(i, 0, show_deref=False)
            print_no_end(" += D")
            modified = True

        elif i.id in INST_LODS:
            self.print_operand(i, 0)
            print_no_end(" = ")
            self.print_operand(i, 1)
            print()
            print_label_or_addr(i.address, tab)
            self.print_operand(i, 1, show_deref=False)
            print_no_end(" += D")
            modified = True

        elif i.id in INST_CMPS:
            self.print_operand(i, 0)
            print_no_end(" cmp ")
            self.print_operand(i, 1)
            print()
            print_label_or_addr(i.address, tab)
            self.print_operand(i, 0, show_deref=False)
            print(" += D")
            print_label_or_addr(i.address, tab)
            self.print_operand(i, 1, show_deref=False)
            print_no_end("' += D")
            modified = True

        elif i.id in INST_MOVS:
            self.print_operand(i, 0)
            print_no_end(" = ")
            self.print_operand(i, 1)
            print()
            print_label_or_addr(i.address, tab)
            self.print_operand(i, 0, show_deref=False)
            print(" += D")
            print_label_or_addr(i.address, tab)
            self.print_operand(i, 1, show_deref=False)
            print_no_end(" += D")
            modified = True

        else:
            print_no_end("%s " % i.mnemonic)
            if len(i.operands) > 0:
                modified = self.print_operand(i, 0)
                k = 1
                while k < len(i.operands):
                    print_no_end(", ")
                    modified |= self.print_operand(i, k)
                    k += 1

        print_rep_end()

        return modified