public static long getUnsignedOffset(Varnode v, int size) {
		if (size == 0 || size >= 8) {
			return v.getOffset();
		}
		return VALUE_MASK[size] & v.getOffset();
	}
@return Varnode that represents the stack pointer register
Ghidra/Features/Base/src/main/java/ghidra/util/state/ResultsState.java