gtpi1m4qSystem Installation Support Reference

Selective Core Resident Load

The selective core resident load user exit, UCLB, allows you to specify if a specific core resident program will be loaded during restart. UCLB is called by the CLIB segment to determine if a core resident program will be loaded.

Input

R5
Contains the address of the program allocation table (PAT) slot.

CE1DBI
Contains the database identifier (DBI) of the subsystem that is being processed by the CLIB segment.

CE1PBI
Contains the program base identifier (PBI) of the BSS subsystem.

Programming Considerations

If multiple subsystems are present, the CLIB segment loads core resident programs for each subsystem.

Return Values

R2 contains one of the following return codes:

0
Load the program.

Nonzero
Do not load the program.