public string GetCustomAttribute(Il2CppImageDefinition imageDef, int customAttributeIndex, uint token, string padding = "")
{
if (il2Cpp.Version < 21)
{
return(string.Empty);
}
var attributeIndex = metadata.GetCustomAttributeIndex(imageDef, customAttributeIndex, token);
if (attributeIndex >= 0)
{
if (il2Cpp.Version < 29)
{
var methodPointer = executor.customAttributeGenerators[attributeIndex];
var fixedMethodPointer = il2Cpp.GetRVA(methodPointer);
var attributeTypeRange = metadata.attributeTypeRanges[attributeIndex];
var sb = new StringBuilder();
for (var i = 0; i < attributeTypeRange.count; i++)
{
var typeIndex = metadata.attributeTypes[attributeTypeRange.start + i];
sb.AppendFormat("{0}[{1}] // RVA: 0x{2:X} Offset: 0x{3:X} VA: 0x{4:X}\n",
padding,
executor.GetTypeName(il2Cpp.types[typeIndex], false, false),
fixedMethodPointer,
il2Cpp.MapVATR(methodPointer),
methodPointer);
}
return(sb.ToString());
}
else
{
var startRange = metadata.attributeDataRanges[attributeIndex];
var endRange = metadata.attributeDataRanges[attributeIndex + 1];
metadata.Position = metadata.header.attributeDataOffset + startRange.startOffset;
var buff = metadata.ReadBytes((int)(endRange.startOffset - startRange.startOffset));
var reader = new CustomAttributeDataReader(executor, buff);
if (reader.Count == 0)
{
return(string.Empty);
}
var sb = new StringBuilder();
for (var i = 0; i < reader.Count; i++)
{
sb.Append(padding);
sb.Append(reader.GetStringCustomAttributeData());
sb.Append("\n");
}
return(sb.ToString());
}
}
else
{
return(string.Empty);
}
}
private void CreateCustomAttribute(Il2CppImageDefinition imageDef, int customAttributeIndex, uint token, ModuleDefinition moduleDefinition, Collection <CustomAttribute> customAttributes)
{
var attributeIndex = metadata.GetCustomAttributeIndex(imageDef, customAttributeIndex, token);
if (attributeIndex >= 0)
{
try
{
if (il2Cpp.Version < 29)
{
var attributeTypeRange = metadata.attributeTypeRanges[attributeIndex];
for (int i = 0; i < attributeTypeRange.count; i++)
{
var attributeTypeIndex = metadata.attributeTypes[attributeTypeRange.start + i];
var attributeType = il2Cpp.types[attributeTypeIndex];
var typeDef = executor.GetTypeDefinitionFromIl2CppType(attributeType);
var typeDefinition = typeDefinitionDic[typeDef];
if (!TryRestoreCustomAttribute(typeDefinition, moduleDefinition, customAttributes))
{
var methodPointer = executor.customAttributeGenerators[attributeIndex];
var fixedMethodPointer = il2Cpp.GetRVA(methodPointer);
var customAttribute = new CustomAttribute(moduleDefinition.ImportReference(attributeAttribute));
var name = new CustomAttributeNamedArgument("Name", new CustomAttributeArgument(stringType, typeDefinition.Name));
var rva = new CustomAttributeNamedArgument("RVA", new CustomAttributeArgument(stringType, $"0x{fixedMethodPointer:X}"));
var offset = new CustomAttributeNamedArgument("Offset", new CustomAttributeArgument(stringType, $"0x{il2Cpp.MapVATR(methodPointer):X}"));
customAttribute.Fields.Add(name);
customAttribute.Fields.Add(rva);
customAttribute.Fields.Add(offset);
customAttributes.Add(customAttribute);
}
}
}
else
{
var startRange = metadata.attributeDataRanges[attributeIndex];
var endRange = metadata.attributeDataRanges[attributeIndex + 1];
metadata.Position = metadata.header.attributeDataOffset + startRange.startOffset;
var buff = metadata.ReadBytes((int)(endRange.startOffset - startRange.startOffset));
var reader = new CustomAttributeDataReader(executor, buff);
if (reader.Count != 0)
{
for (var i = 0; i < reader.Count; i++)
{
var visitor = reader.VisitCustomAttributeData();
var methodDefinition = methodDefinitionDic[visitor.CtorIndex];
var customAttribute = new CustomAttribute(moduleDefinition.ImportReference(methodDefinition));
foreach (var argument in visitor.Arguments)
{
var parameterDefinition = methodDefinition.Parameters[argument.Index];
var customAttributeArgument = CreateCustomAttributeArgument(parameterDefinition.ParameterType, argument.Value, methodDefinition);
customAttribute.ConstructorArguments.Add(customAttributeArgument);
}
foreach (var field in visitor.Fields)
{
var fieldDefinition = fieldDefinitionDic[field.Index];
var customAttributeArgument = CreateCustomAttributeArgument(fieldDefinition.FieldType, field.Value, fieldDefinition);
var customAttributeNamedArgument = new CustomAttributeNamedArgument(fieldDefinition.Name, customAttributeArgument);
customAttribute.Fields.Add(customAttributeNamedArgument);
}
foreach (var property in visitor.Properties)
{
var propertyDefinition = propertyDefinitionDic[property.Index];
var customAttributeArgument = CreateCustomAttributeArgument(propertyDefinition.PropertyType, property.Value, propertyDefinition);
var customAttributeNamedArgument = new CustomAttributeNamedArgument(propertyDefinition.Name, customAttributeArgument);
customAttribute.Properties.Add(customAttributeNamedArgument);
}
customAttributes.Add(customAttribute);
}
}
}
}
catch
{
Console.WriteLine($"ERROR: Error while restoring attributeIndex {attributeIndex}");
}
}
}
