Network Router User Manual

12 Cisco IOS for S/390 Release 2.0 Release Notes
Documentation
Exit Recovery Routine
The exit program can supply the address of a recovery routine via a parameter returned at the INIT
exit point. The exit facility calls this routine in the event of an ABEND in the exit program. The
recovery routine is called in the same mode as the ABENDing exit program, and is passed the
System Diagnostic Work Area (SDWA) address and the EWA address (if any). Since the exit's
recovery routine is called after the system's Recovery and Termination Manager (RTM) has finished
processing the ABEND, it should perform only local clean-up functions. Any updates to the SDWA
are ignored. The recovery routine should not attempt to free the SDWA, since this will be done by
the exit facility.
Recovery Exit
Exit Point: When an ABEND has occurred in an exit program.
Function: Perform clean-up associated with the exit program.
Dispatchable Unit: Identical with the ABENDing exit program.
Register contents are shown in the following table.
Table 5 Recovery Exit Register Contents
On return from the recovery exit, R13 must be restored.
Exit Parameter List Mapping Macro - T00DEXPL
A new macro, T00DEXPL, is supplied to map the parameter lists to the exit program at the various
exit points. The macro is distributed in the SAMP library.
Register Contents on Entry
R00 SDWA (if processing under an SRB, a copy of the SDWA)
R01 Exit Work Area address (if applicable)
R02-R12 Zeros
R13 Save area address
R14 Return address
R15 Entry point address