public int readVirtualMemory(int vaddr, byte[] data, int offset, int length) {
		Lib.assertTrue(offset >= 0 && length >= 0
				&& offset + length <= data.length);

		byte[] memory = Machine.processor().getMemory();

		// for now, just assume that virtual addresses equal physical addresses
		if (vaddr < 0 || vaddr >= memory.length)
			return 0;
		// Implement error check for paddr

		int amount = Math.min(length, memory.length - vaddr);
		/*public static void arraycopy(Object src,
                             int srcPos,
                             Object dest,
                             int destPos,
                             int length)
                             */
		System.arraycopy(memory, vaddr, data, offset, amount);

		return amount;
	}