gtpi1m22 | System Installation Support Reference |
User exit routine UCCCSOX is activated at the end of stack overflow
processing if the exit point named CSOX is active. User exit CSOX is
called from an ISO-C environment. Exit point CSOX is in CSECT CCISOC
(CIS2).
General Conditions at Entry
The registers at entry to UCCCSOX are:
- R8
- Points to the dynamic load module (DLM) header.
- R9
- Address of the ECB.
- R13-R15
- See User Exit Routines - Common Entry Conditions.
System Conditions at Entry
- System state
- Problem (see Programming Considerations at Entry, item 1)
- System mask
- Unmasked (see Programming Considerations at Entry, item 1)
- Protect key
- Working storage
- Address state
- EVM.
Programming Considerations at Entry
- Usually, the system state, system mask, and protection key
are as stated. However, there can be exceptions if system programs
issued MONTC to get to supervisor state, changed the system mask, or changed
the protection key.
- See User Exit Routines - Common Programming Considerations for other considerations.
Programming Considerations on Return
See User Exit Routines - Common Return Conditions.
General Conditions on Return
See User Exit Routines - Common Return Conditions.