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Copy pathmetadata.py
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297 lines (267 loc) · 11.5 KB
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from .metadata_class import *
from typing import List, Dict
from collections import OrderedDict
class Metadata:
header: Il2CppGlobalMetadataHeader
imageDefs: List[Il2CppImageDefinition]
typeDefs: List[Il2CppTypeDefinition]
methodDefs: List[Il2CppMethodDefinition]
parameterDefs: List[Il2CppParameterDefinition]
fieldDefs: List[Il2CppFieldDefinition]
fieldDefaultValuesDic: Dict[int, Il2CppFieldDefaultValue]
parameterDefaultValuesDic: Dict[int, Il2CppParameterDefaultValue]
propertyDefs: List[Il2CppPropertyDefinition]
attributeTypeRanges: List[Il2CppCustomAttributeTypeRange]
attributeTypeRangesDic: Dict[Il2CppImageDefinition, Dict[uint, int]]
stringLiterals: List[Il2CppStringLiteral]
metadataUsageLists: List[Il2CppMetadataUsageList]
metadataUsagePairs: List[Il2CppMetadataUsagePair]
attributeTypes: List[int]
interfaceIndices: List[int]
metadataUsageDic: Dict[uint, OrderedDict[uint, uint]]
maxMetadataUsages: int # long
nestedTypeIndices: List[int]
eventDefs: List[Il2CppEventDefinition]
genericContainers: List[Il2CppGenericContainer]
fieldRefs: List[Il2CppFieldRef]
genericParameters: List[Il2CppGenericParameter]
constraintIndices: List[int]
vtableMethods: List[uint]
rgctxEntries: List[Il2CppRGCTXDefinition]
stringCache: Dict[uint, str]
Address: int # ulong
version: int
Version: float
def __init__(self, stream: BytesIO):
self.reader = stream
self.stringCache = {}
sanity = uint.read_from(stream)
if sanity != 0xFAB11BAF:
raise ValueError(
"ERROR: Metadata file supplied is not valid metadata file."
)
self.version = version = int.read_from(stream)
if version < 16 or version > 27:
raise NotImplementedError(
f"ERROR: Metadata file supplied is not a supported version[{version}]."
)
self.Version = Version = float(version)
self.header = header = self.ReadClass(Il2CppGlobalMetadataHeader, 0)
if version == 24:
if header.stringLiteralOffset == 264:
self.Version = Version = 24.2
self.header = header = self.ReadClass(Il2CppGlobalMetadataHeader, 0)
else:
self.imageDefs = imageDefs = self.ReadMetadataClassArray(
Il2CppImageDefinition, header.imagesOffset, header.imagesCount
)
if any(x.token != 1 for x in imageDefs):
self.Version = Version = 24.1
self.imageDefs = imageDefs = self.ReadMetadataClassArray(
Il2CppImageDefinition, header.imagesOffset, header.imagesCount
)
self.typeDefs = self.ReadMetadataClassArray(
Il2CppTypeDefinition,
header.typeDefinitionsOffset,
header.typeDefinitionsCount,
)
self.methodDefs = self.ReadMetadataClassArray(
Il2CppMethodDefinition, header.methodsOffset, header.methodsCount
)
self.parameterDefs = self.ReadMetadataClassArray(
Il2CppParameterDefinition, header.parametersOffset, header.parametersCount
)
self.fieldDefs = self.ReadMetadataClassArray(
Il2CppFieldDefinition, header.fieldsOffset, header.fieldsCount
)
self.fieldDefaultValues = self.ReadMetadataClassArray(
Il2CppFieldDefaultValue,
header.fieldDefaultValuesOffset,
header.fieldDefaultValuesCount,
)
self.parameterDefaultValues = self.ReadMetadataClassArray(
Il2CppParameterDefaultValue,
header.parameterDefaultValuesOffset,
header.parameterDefaultValuesCount,
)
self.fieldDefaultValuesDic = {x.fieldIndex: x for x in self.fieldDefaultValues}
self.parameterDefaultValuesDic = {
x.parameterIndex: x for x in self.parameterDefaultValues
}
self.propertyDefs = self.ReadMetadataClassArray(
Il2CppPropertyDefinition, header.propertiesOffset, header.propertiesCount
)
self.interfaceIndices = self.ReadClassArray(
int, header.interfacesOffset, header.interfacesCount // 4
)
self.nestedTypeIndices = self.ReadClassArray(
int, header.nestedTypesOffset, header.nestedTypesCount // 4
)
self.eventDefs = self.ReadMetadataClassArray(
Il2CppEventDefinition, header.eventsOffset, header.eventsCount
)
self.genericContainers = self.ReadMetadataClassArray(
Il2CppGenericContainer,
header.genericContainersOffset,
header.genericContainersCount,
)
self.genericParameters = self.ReadMetadataClassArray(
Il2CppGenericParameter,
header.genericParametersOffset,
header.genericParametersCount,
)
self.constraintIndices = self.ReadClassArray(
int,
header.genericParameterConstraintsOffset,
header.genericParameterConstraintsCount // 4,
)
self.vtableMethods = self.ReadClassArray(
uint, header.vtableMethodsOffset, header.vtableMethodsCount // 4
)
if 16 < Version < 27: # TODO
self.stringLiterals = self.ReadMetadataClassArray(
Il2CppStringLiteral,
header.stringLiteralOffset,
header.stringLiteralCount,
)
self.metadataUsageLists = self.ReadMetadataClassArray(
Il2CppMetadataUsageList,
header.metadataUsageListsOffset,
header.metadataUsageListsCount,
)
self.metadataUsagePairs = self.ReadMetadataClassArray(
Il2CppMetadataUsagePair,
header.metadataUsagePairsOffset,
header.metadataUsagePairsCount,
)
self.ProcessingMetadataUsage()
self.fieldRefs = self.ReadMetadataClassArray(
Il2CppFieldRef, header.fieldRefsOffset, header.fieldRefsCount
)
if Version > 20:
self.attributeTypeRanges = self.ReadMetadataClassArray(
Il2CppCustomAttributeTypeRange,
header.attributesInfoOffset,
header.attributesInfoCount,
)
self.attributeTypes = self.ReadClassArray(
int, header.attributeTypesOffset, header.attributeTypesCount // 4
)
if Version >= 24.1:
self.attributeTypeRangesDic = attributeTypeRangesDic = {}
for imageDef in imageDefs:
dic = {}
attributeTypeRangesDic[imageDef] = dic
end = imageDef.customAttributeStart + imageDef.customAttributeCount
for i in range(imageDef.customAttributeStart, end):
dic[self.attributeTypeRanges[i].token] = i
if Version <= 24.1:
self.rgctxEntries = self.ReadMetadataClassArray(
Il2CppRGCTXDefinition,
header.rgctxEntriesOffset,
header.rgctxEntriesCount,
)
def ReadClass(self, clz: MetaDataClass, addr: int) -> List[MetaDataClass]:
self.reader.seek(addr)
return clz.generate_versioned_subclass(self.Version)(self.reader)
def ReadClassArray(
self,
clz: Union[MetaDataClass, CustomIntWrapper, Il2CppRGCTXDefinition],
addr: int,
count: int,
) -> List[MetaDataClass]:
self.reader.seek(addr)
if issubclass(clz, (MetaDataClass, Il2CppRGCTXDefinition)):
return [clz(self.reader) for _ in range(count)]
elif issubclass(clz, CustomIntWrapper):
return [clz.read_from(self.reader) for _ in range(count)]
elif clz == Il2CppRGCTXDefinition:
return [clz.read_from(self.reader) for _ in range(count)]
else:
raise ValueError("Invalid clz type")
def ReadMetadataClassArray(
self, clz: MetaDataClass, addr: int, count: int
) -> List[MetaDataClass]:
clz = clz.generate_versioned_subclass(self.Version)
return self.ReadClassArray(clz, addr, count // clz.size)
def GetFieldDefaultValueFromIndex(self, index: int) -> Il2CppFieldDefaultValue:
return self.fieldDefaultValuesDic.get(index, None)
def GetParameterDefaultValueFromIndex(
self, index: int
) -> Il2CppParameterDefaultValue:
return self.parameterDefaultValuesDic.get(index, None)
def GetDefaultValueFromIndex(self, index: int) -> int:
return self.header.fieldAndParameterDefaultValueDataOffset + index
def GetStringFromIndex(self, index: int) -> str:
result = self.stringCache.get(index, None)
if result == None:
result = self.ReadStringToNull(self.header.stringOffset + index)
self.stringCache[index] = result
return result
# public int GetCustomAttributeIndex(Il2CppImageDefinition imageDef, int customAttributeIndex, uint token)
# {
# if (Version > 24)
# {
# if (attributeTypeRangesDic[imageDef].TryGetValue(token, out var index))
# {
# return index
# }
# else
# {
# return -1
# }
# }
# else
# {
# return customAttributeIndex
# }
# }
def GetStringLiteralFromIndex(self, index: int) -> str:
stringLiteral = self.stringLiterals[index]
self.reader.seek(self.header.stringLiteralDataOffset + stringLiteral.dataIndex)
return self.reader.read(stringLiteral.Length).encode("utf8")
def GetStringLiterals(self):
return [self.GetDecodedMethodIndex(i) for i in range(len(self.stringLiterals))]
def ProcessingMetadataUsage(self):
self.metadataUsageDic = metadataUsageDic = {
i: OrderedDict() for i in range(1, 7)
}
for metadataUsageList in self.metadataUsageLists:
for i in range(metadataUsageList.count):
offset = metadataUsageList.start + i
metadataUsagePair = self.metadataUsagePairs[offset]
usage = self.GetEncodedIndexType(metadataUsagePair.encodedSourceIndex)
decodedIndex = self.GetDecodedMethodIndex(
metadataUsagePair.encodedSourceIndex
)
metadataUsageDic[usage][
metadataUsagePair.destinationIndex
] = decodedIndex
self.maxMetadataUsages = (
max(y for x in metadataUsageDic.values() for y in x.keys()) + 1
)
def GetEncodedIndexType(self, index: int) -> int:
return (index & 0xE0000000) >> 29
def GetDecodedMethodIndex(self, index: int):
if self.Version >= 27:
return (index & 0x1FFFFFFE) >> 1
return index & 0x1FFFFFFF
def SizeOf(typ) -> int:
return typ.size
def ReadString(self, numChars: int) -> str:
start = self.reader.tell()
# UTF8 takes up to 4 bytes per character
string = self.reader.read(numChars * 4).encode("utf8")[:numChars]
# make our position what it would have been if we'd known the exact number of bytes needed.
self.reader.seek(start)
self.reader.read(len(string.encode("utf8")))
return string
def ReadStringToNull(self, offset: int) -> str:
read_one = lambda: self.reader.read(1)
start = self.reader.seek(offset)
c = b"\x00"
ret = []
while c == b"\x00":
c = read_one()
ret.append(c)
return b"".join(ret).encode("utf8")