Characteristics of DFSMSdss Installation Exit Routines

All DFSMSdss Installation Exits are called:

In 31-bit addressing mode
With authorized program facility (APF) authorization (if DFSMSdss is APF-authorized), and
In key 8 problem state.

The exits are intended for use only by system programmers who must use caution with APF authorization. As with all subroutines, do not link edit installation exits with APF authorization.

DFSMSdss installation exits must:

Observe standard register save and restore functions
Be written in reentrant code
Be link-edited with the DFSMSdss load module, ADRDSSU
Restore the execution environment (31-bit addressing mode, key 8, problem state) before returning to DFSMSdss.