gtpi1m2l | System Installation Support Reference |
User exit routine UCCCEXP is invoked by the C function trace exception routine (CTR0). The C user can use UCCCEXP to initialize storage after the user trace area storage is allocated. The SETTC macro must have been previously issued by this ECB to allocate the C function trace user area (for example, in the CDEB user exit).
General Conditions at Entry
The registers at entry to UCCCEXP are:
System Conditions at Entry
Programming Considerations at Entry
SeeUser Exit Routines - Common Programming Considerations.
You can issue the ENATC macro from the CEXP user exit. However, the ENATC macro uses register 15 to provide return code information. This use of register 15 conflicts with the user exit usage of register 15 for addressing. Therefore, before you issue the ENATC macro from the CEXP user exit, establish addressability using a base register other than 15.
Programming Considerations on Return
See User Exit Routines - Common Return Conditions.
General Conditions on Return