On Alpha and Integrity server systems, creates a permanent global
    page file section to which processes can map.

    This service accepts 64-bit addresses.

    Format

      SYS$CREATE_GPFILE  gs_name_64 ,ident_64 ,prot ,length_64

                         ,acmode ,flags

    C Prototype

      int sys$create_gpfile  (void *gs_name_64, struct _secid

                             *ident_64, unsigned int prot, unsigned

                             __int64 length_64, unsigned int acmode,

                             unsigned int flags);