On Alpha and Integrity server systems, creates a permanent,
    memory-resident, global demand-zero section to which processes
    can map. Shared page table sections can also be created.

    This service accepts 64-bit addresses.

    Format

      SYS$CREATE_GDZRO  gs_name_64 ,ident_64 ,prot ,length_64 ,acmode

                        ,flags [,reserved_length_64] [,rad_mask]

    C Prototype

      int sys$create_gdzro  (void *gs_name_64, struct _secid

                            *ident_64, unsigned int prot, unsigned

                            __int64 length_64, unsigned int acmode,

                            unsigned int flags,...);