Method ParseRebaseTable

view/macho/machoview.cpp:2666–2810

}

void MachoView::ParseRebaseTable(BinaryReader& reader, MachOHeader& header, uint32_t tableOffset, uint32_t tableSize)
{
	if (tableSize == 0 || tableOffset == 0)
		return;

	std::function segmentActualLoadAddress = [&](uint64_t segmentIndex) {
		if (segmentIndex >= header.segments.size())
			throw ReadException();
		return header.segments[segmentIndex].vmaddr;
	};
	std::function segmentActualEndAddress = [&](uint64_t segmentIndex) {
		if (segmentIndex >= header.segments.size())
			throw ReadException();
		return header.segments[segmentIndex].vmaddr + header.segments[segmentIndex].vmsize;
	};

	try {
		reader.Seek(tableOffset);
		auto table = reader.Read(tableSize);

		BNRelocationInfo rebaseRelocation;

		uint64_t segmentIndex = 0;
		uint64_t address = segmentActualLoadAddress(0);
		uint64_t segmentStartAddress = segmentActualLoadAddress(0);
		uint64_t segmentEndAddress = segmentActualEndAddress(0);
		uint64_t count;
		uint64_t skip;
		bool done = false;
		size_t i = 0;
		while ( !done && (i < tableSize))
		{
			uint8_t opAndIm = table[i];
			uint8_t opcode = opAndIm & RebaseOpcodeMask;
			uint64_t immediate = opAndIm & RebaseImmediateMask;
			m_logger->LogDebug("Rebase opcode 0x%llx (im: 0x%llx)", opcode, immediate);
			i++;
			switch (opcode)
			{
			case RebaseOpcodeDone:
				done = true;
				break;
			case RebaseOpcodeSetTypeImmediate:
				break;
			case RebaseOpcodeSetSegmentAndOffsetUleb:
				segmentIndex = immediate;
				address = segmentActualLoadAddress(segmentIndex) + readLEB128(table, tableSize, i);
				segmentStartAddress = segmentActualLoadAddress(segmentIndex);
				segmentEndAddress = segmentActualEndAddress(segmentIndex);
				break;
			case RebaseOpcodeAddAddressUleb:
				address += readLEB128(table, tableSize, i);
				break;
			case RebaseOpcodeAddAddressImmediateScaled:
				address += immediate * m_addressSize;
				break;
			case RebaseOpcodeDoRebaseImmediateTimes:
				count = immediate;