SS$_NORMAL         The service completed successfully.
    SS$_ACCVIO         The return_va_64 or return_length_64 argument
                       cannot be written by the caller.
    SS$_BADPARAM       A bad fault_flag argument was specified.
    SS$_LENVIO         A page in the specified range is beyond
                       the length of virtual addresses within that
                       region.
    SS$_NOSUCHPAG      An attempt was made to change the fault
                       characteristic on a nonexistent page.
    SS$_PAGNOTINREG    A page in the specified range is not in
                       process private adress space.
    SS$_PAGOWNVIO      The process attempted to change the protection
                       on a page owned by a more privileged access
                       mode.