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DelphiClass_ClassTable.py
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73 lines (58 loc) · 2.21 KB
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#
# This module allows to parse Delphi's ClassTable
#
# Copyright (c) 2020-2025 ESET
# Author: Juraj Horňák <juraj.hornak@eset.com>
# See LICENSE file for redistribution.
import ida_bytes
import ida_name
from DelphiHelper.util.exception import DelphiHelperError
from DelphiHelper.util.ida import *
class ClassTable(object):
def __init__(
self,
addr: int,
tableName: str,
delphiVersion: int) -> None:
self.__tableAddr = addr
self.__tableName = tableName
self.__tableEntries = list()
self.__processorWordSize = GetProcessorWordSize()
self.__delphiVersion = delphiVersion
if self.__tableAddr != 0:
self.__numOfEntries = Word(self.__tableAddr)
def GetTableAddress(self) -> int:
return self.__tableAddr
def MakeTable(self) -> None:
if self.__tableAddr != 0:
self.__DeleteTable()
self.__CreateTable()
return self.__tableEntries
def __CreateTable(self) -> None:
MakeWord(self.__tableAddr)
MakeName(self.__tableAddr, self.__tableName + "_ClassTable")
ida_bytes.set_cmt(self.__tableAddr, "Number of entries", 0)
addr = self.__tableAddr + 2
for i in range(self.__numOfEntries):
vmtStructAddr = GetCustomWord(addr, self.__processorWordSize)
self.__tableEntries.append(vmtStructAddr)
if ida_bytes.is_loaded(vmtStructAddr) and \
vmtStructAddr != 0 and \
ida_name.get_name(vmtStructAddr)[:4] != "VMT_":
from DelphiHelper.core.DelphiClass import DelphiClass
try:
delphiClass = DelphiClass(
vmtStructAddr,
self.__delphiVersion
)
delphiClass.MakeClass()
except DelphiHelperError as e:
e.print()
MakeCustomWord(addr, self.__processorWordSize)
addr += self.__processorWordSize
def __DeleteTable(self) -> None:
ida_bytes.del_items(
self.__tableAddr,
ida_bytes.DELIT_DELNAMES,
self.__numOfEntries * self.__processorWordSize + 2
)