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Collect field defaults into Il2CppInspector.FieldDefaultValue on load

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This commit is contained in:
Katy Coe
2017-11-07 07:04:46 +01:00
parent 5890b0a1c1
commit 2a2617674a
5 changed files with 93 additions and 76 deletions
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156
Il2CppInspector/Il2CppInspector.cs
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@@ -17,9 +17,80 @@ namespace Il2CppInspector
public Il2CppBinary Binary { get; }
public Metadata Metadata { get; }
// Shortcuts
public Dictionary<int, string> Strings => Metadata.Strings;
public Il2CppTypeDefinition[] TypeDefinitions => Metadata.Types;
public List<Il2CppType> TypeUsages => Binary.Types;
public Dictionary<int, object> FieldDefaultValue { get; } = new Dictionary<int, object>();
public Il2CppInspector(Il2CppBinary binary, Metadata metadata) {
// Store stream representations
Binary = binary;
Metadata = metadata;
// Get all field default values
foreach (var fdv in Metadata.FieldDefaultValues) {
// No default
if (fdv.dataIndex == -1) {
FieldDefaultValue.Add(fdv.fieldIndex, null);
continue;
}
// Get pointer in binary to default value
var pValue = Metadata.Header.fieldAndParameterDefaultValueDataOffset + fdv.dataIndex;
var type = TypeUsages[fdv.typeIndex];
// Default value is null
if (pValue == 0) {
FieldDefaultValue.Add(fdv.fieldIndex, null);
continue;
}
object value = null;
Metadata.Position = pValue;
switch (type.type) {
case Il2CppTypeEnum.IL2CPP_TYPE_BOOLEAN:
value = Metadata.ReadBoolean();
break;
case Il2CppTypeEnum.IL2CPP_TYPE_U1:
case Il2CppTypeEnum.IL2CPP_TYPE_I1:
value = Metadata.ReadByte();
break;
case Il2CppTypeEnum.IL2CPP_TYPE_CHAR:
value = Metadata.ReadChar();
break;
case Il2CppTypeEnum.IL2CPP_TYPE_U2:
value = Metadata.ReadUInt16();
break;
case Il2CppTypeEnum.IL2CPP_TYPE_I2:
value = Metadata.ReadInt16();
break;
case Il2CppTypeEnum.IL2CPP_TYPE_U4:
value = Metadata.ReadUInt32();
break;
case Il2CppTypeEnum.IL2CPP_TYPE_I4:
value = Metadata.ReadInt32();
break;
case Il2CppTypeEnum.IL2CPP_TYPE_U8:
value = Metadata.ReadUInt64();
break;
case Il2CppTypeEnum.IL2CPP_TYPE_I8:
value = Metadata.ReadInt64();
break;
case Il2CppTypeEnum.IL2CPP_TYPE_R4:
value = Metadata.ReadSingle();
break;
case Il2CppTypeEnum.IL2CPP_TYPE_R8:
value = Metadata.ReadDouble();
break;
case Il2CppTypeEnum.IL2CPP_TYPE_STRING:
var uiLen = Metadata.ReadInt32();
value = Encoding.UTF8.GetString(Metadata.ReadBytes(uiLen));
break;
}
FieldDefaultValue.Add(fdv.fieldIndex, value);
}
}
public static List<Il2CppInspector> LoadFromFile(string codeFile, string metadataFile) {
@@ -37,9 +108,9 @@ namespace Il2CppInspector
var memoryStream = new MemoryStream(File.ReadAllBytes(codeFile));
IFileFormatReader stream =
(((IFileFormatReader) ElfReader.Load(memoryStream) ??
PEReader.Load(memoryStream)) ??
MachOReader.Load(memoryStream)) ??
UBReader.Load(memoryStream);
PEReader.Load(memoryStream)) ??
MachOReader.Load(memoryStream)) ??
UBReader.Load(memoryStream);
if (stream == null) {
Console.Error.WriteLine("Unsupported executable file format");
return null;
@@ -77,16 +148,17 @@ namespace Il2CppInspector
public string GetTypeName(Il2CppType pType) {
string ret;
if (pType.type == Il2CppTypeEnum.IL2CPP_TYPE_CLASS || pType.type == Il2CppTypeEnum.IL2CPP_TYPE_VALUETYPE) {
Il2CppTypeDefinition klass = Metadata.Types[pType.datapoint];
ret = Metadata.Strings[klass.nameIndex];
Il2CppTypeDefinition klass = TypeDefinitions[pType.datapoint];
ret = Strings[klass.nameIndex];
}
else if (pType.type == Il2CppTypeEnum.IL2CPP_TYPE_GENERICINST) {
Il2CppGenericClass generic_class = Binary.Image.ReadMappedObject<Il2CppGenericClass>(pType.datapoint);
Il2CppTypeDefinition pMainDef = Metadata.Types[generic_class.typeDefinitionIndex];
ret = Metadata.Strings[pMainDef.nameIndex];
Il2CppTypeDefinition pMainDef = TypeDefinitions[generic_class.typeDefinitionIndex];
ret = Strings[pMainDef.nameIndex];
var typeNames = new List<string>();
Il2CppGenericInst pInst = Binary.Image.ReadMappedObject<Il2CppGenericInst>(generic_class.context.class_inst);
var pointers = Binary.Image.ReadMappedArray<uint>(pInst.type_argv, (int)pInst.type_argc);
Il2CppGenericInst pInst =
Binary.Image.ReadMappedObject<Il2CppGenericInst>(generic_class.context.class_inst);
var pointers = Binary.Image.ReadMappedArray<uint>(pInst.type_argv, (int) pInst.type_argc);
for (int i = 0; i < pInst.type_argc; ++i) {
var pOriType = Binary.Image.ReadMappedObject<Il2CppType>(pointers[i]);
typeNames.Add(GetTypeName(pOriType));
@@ -103,13 +175,14 @@ namespace Il2CppInspector
ret = $"{GetTypeName(type)}[]";
}
else {
if ((int)pType.type >= DefineConstants.CSharpTypeString.Count)
if ((int) pType.type >= DefineConstants.CSharpTypeString.Count)
ret = "unknow";
else
ret = DefineConstants.CSharpTypeString[(int)pType.type];
ret = DefineConstants.CSharpTypeString[(int) pType.type];
}
return ret;
}
public int GetFieldOffsetFromIndex(int typeIndex, int fieldIndexInType) {
// Versions from 22 onwards use an array of pointers in fieldOffsets
bool fieldOffsetsArePointers = (Metadata.Version >= 22);
@@ -122,70 +195,13 @@ namespace Il2CppInspector
// All older versions use values directly in the array
if (!fieldOffsetsArePointers) {
var typeDef = Metadata.Types[typeIndex];
var typeDef = TypeDefinitions[typeIndex];
return Binary.FieldOffsets[typeDef.fieldStart + fieldIndexInType];
}
var ptr = Binary.FieldOffsets[typeIndex];
Binary.Image.Stream.Position = Binary.Image.MapVATR((uint)ptr) + 4 * fieldIndexInType;
Binary.Image.Stream.Position = Binary.Image.MapVATR((uint) ptr) + 4 * fieldIndexInType;
return Binary.Image.Stream.ReadInt32();
}
public object GetDefaultValueForField(int fieldIndex) {
var def = Metadata.FieldDefaultValues.FirstOrDefault(x => x.fieldIndex == fieldIndex);
if (def == null || def.dataIndex == -1)
return null;
var pValue = Metadata.Header.fieldAndParameterDefaultValueDataOffset + def.dataIndex;
Il2CppType type = Binary.Types[def.typeIndex];
if (pValue == 0)
return null;
object value = null;
Metadata.Position = pValue;
switch (type.type) {
case Il2CppTypeEnum.IL2CPP_TYPE_BOOLEAN:
value = Metadata.ReadBoolean();
break;
case Il2CppTypeEnum.IL2CPP_TYPE_U1:
case Il2CppTypeEnum.IL2CPP_TYPE_I1:
value = Metadata.ReadByte();
break;
case Il2CppTypeEnum.IL2CPP_TYPE_CHAR:
value = Metadata.ReadChar();
break;
case Il2CppTypeEnum.IL2CPP_TYPE_U2:
value = Metadata.ReadUInt16();
break;
case Il2CppTypeEnum.IL2CPP_TYPE_I2:
value = Metadata.ReadInt16();
break;
case Il2CppTypeEnum.IL2CPP_TYPE_U4:
value = Metadata.ReadUInt32();
break;
case Il2CppTypeEnum.IL2CPP_TYPE_I4:
value = Metadata.ReadInt32();
break;
case Il2CppTypeEnum.IL2CPP_TYPE_U8:
value = Metadata.ReadUInt64();
break;
case Il2CppTypeEnum.IL2CPP_TYPE_I8:
value = Metadata.ReadInt64();
break;
case Il2CppTypeEnum.IL2CPP_TYPE_R4:
value = Metadata.ReadSingle();
break;
case Il2CppTypeEnum.IL2CPP_TYPE_R8:
value = Metadata.ReadDouble();
break;
case Il2CppTypeEnum.IL2CPP_TYPE_STRING:
var uiLen = Metadata.ReadInt32();
value = Encoding.UTF8.GetString(Metadata.ReadBytes(uiLen));
break;
}
return value;
}
}
}

1
Il2CppInspector/Metadata.cs
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@@ -23,6 +23,7 @@ namespace Il2CppInspector
public Il2CppParameterDefinition[] Params { get; }
public Il2CppFieldDefinition[] Fields { get; }
public Il2CppFieldDefaultValue[] FieldDefaultValues { get; }
public Dictionary<int, string> Strings { get; } = new Dictionary<int, string>();
public Metadata(Stream stream) : base(stream)

2
Il2CppInspector/Reflection/Assembly.cs
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@@ -34,7 +34,7 @@ namespace Il2CppInspector.Reflection {
Model = model;
Definition = Model.Package.Metadata.Images[imageIndex];
Index = Definition.assemblyIndex;
FullName = Model.Package.Metadata.Strings[Definition.nameIndex];
FullName = Model.Package.Strings[Definition.nameIndex];
if (Definition.entryPointIndex != -1) {
// TODO: Generate EntryPoint method from entryPointIndex

4
Il2CppInspector/Reflection/FieldInfo.cs
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@@ -53,9 +53,9 @@ namespace Il2CppInspector.Reflection {
base(declaringType) {
Definition = pkg.Metadata.Fields[fieldIndex];
Index = fieldIndex;
Name = pkg.Metadata.Strings[pkg.Metadata.Fields[fieldIndex].nameIndex];
Name = pkg.Strings[pkg.Metadata.Fields[fieldIndex].nameIndex];
fieldType = pkg.Binary.Types[Definition.typeIndex];
fieldType = pkg.TypeUsages[Definition.typeIndex];
if ((fieldType.attrs & DefineConstants.FIELD_ATTRIBUTE_PRIVATE) == DefineConstants.FIELD_ATTRIBUTE_PRIVATE)
Attributes |= FieldAttributes.Private;
if ((fieldType.attrs & DefineConstants.FIELD_ATTRIBUTE_PUBLIC) == DefineConstants.FIELD_ATTRIBUTE_PUBLIC)

6
Il2CppInspector/Reflection/TypeInfo.cs
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@@ -116,10 +116,10 @@ namespace Il2CppInspector.Reflection {
// Initialize from specified type index in metadata
public TypeInfo(Il2CppInspector pkg, int typeIndex, Assembly owner) :
base(owner) {
Definition = pkg.Metadata.Types[typeIndex];
Definition = pkg.TypeDefinitions[typeIndex];
Index = typeIndex;
Namespace = pkg.Metadata.Strings[Definition.namespaceIndex];
Name = pkg.Metadata.Strings[pkg.Metadata.Types[typeIndex].nameIndex];
Namespace = pkg.Strings[Definition.namespaceIndex];
Name = pkg.Strings[pkg.TypeDefinitions[typeIndex].nameIndex];
IsSerializable = (Definition.flags & DefineConstants.TYPE_ATTRIBUTE_SERIALIZABLE) != 0;
IsPublic = (Definition.flags & DefineConstants.TYPE_ATTRIBUTE_VISIBILITY_MASK) == DefineConstants.TYPE_ATTRIBUTE_PUBLIC;