We have noted that Linux creates a single data segment containing all the static data of libraries that might be called (directly or indirectly) by a given program. The space required for this segment is usually not a problem: most libraries have little static data—often none at all. Suppose this were not the case. If we wanted to perform dynamic linking for modules with large amounts of per-module static data, how could we extend Linux’s dynamic linking mechanisms to perform fully dynamic (lazy) linking not only of code, but also of data?