Method ReadMethodList

objectivec/objc.cpp:807–915

}

void ObjCProcessor::ReadMethodList(ObjCReader* reader, ClassBase& cls, std::string_view name, view_ptr_t start)
{
	// Lower two bits indicate the type of method list.
	switch (start & 0b11) {
		case 0:
			break;
		case 1:
			return ReadListOfMethodLists(reader, cls, name, start - 1);
		default:
			m_logger->LogDebug("ReadMethodList: Unknown method list type at 0x%llx: %d", start, start & 0x3);
			return;
	}

	reader->Seek(start);
	method_list_t head;
	head.entsizeAndFlags = reader->Read32();
	head.count = reader->Read32();

	if (head.count > 0x1000)
	{
		m_logger->LogError("Method list at 0x%llx has an invalid count of 0x%x", start, head.count);
		return;
	}

	uint64_t pointerSize = m_data->GetAddressSize();
	bool relativeOffsets = (head.entsizeAndFlags & 0xFFFF0000) & 0x80000000;
	bool directSelectors = (head.entsizeAndFlags & 0xFFFF0000) & 0x40000000;
	auto methodSize = relativeOffsets ? 12 : pointerSize * 3;
	DefineObjCSymbol(DataSymbol, m_typeNames.methodList, "method_list_" + std::string(name), start, true);

	for (unsigned i = 0; i < head.count; i++)
	{
		try
		{
			Method method;
			auto cursor = start + sizeof(method_list_t) + (i * methodSize);
			reader->Seek(cursor);
			method_t meth;
			// workflow_objc support
			uint64_t selRefAddr = 0;
			uint64_t selAddr = 0;
			// --
			if (relativeOffsets)
			{
				GetRelativeMethod(reader, meth);
			}
			else
			{
				meth.name = ReadPointerAccountingForRelocations(reader);
				meth.types = ReadPointerAccountingForRelocations(reader);
				meth.imp = ReadPointerAccountingForRelocations(reader);
			}
			if (!relativeOffsets || directSelectors)
			{
				reader->Seek(meth.name);
				selAddr = meth.name;
				method.name = reader->ReadCString();
				reader->Seek(meth.types);