RECONFIGURATION OF ADDRESS SPACE BASED ON LOADING SHORT POINTER MODE APPLICATION

A short pointer mode application has been loaded. Based on determining that the short pointer mode application has been loaded, an address space configured for a long pointer mode environment is reconfigured. The address space has one portion addressable by short pointers of a defined size and another portion addressable by long pointers of another defined size, and the reconfiguring includes obtaining a long pointer library, and loading the long pointer library in the one portion of the address space addressable by short pointers.