Invoking EQQEXIT in JES exits

In JES exits, EQQEXIT must be invoked in Supervisor state, PSW key 1. EQQEXIT expects code addressability to be already established. It also expects registers to be set up as follows:

• EXIT7

  R0

  JCT read/write indicator (JES2 SP Version 3 and earlier); address of a parameter list mapped by the JES2 $XPL macro (JES2 SP Version 4 and later)

  R1

  Address of the JCT being read or written

  R13

  Address of the current PCE

• EXIT51

  R1

  Address of a parameter list mapped by the JES2 $XPL macro (JES2 with z/OS® 1.7, or later)

• IATUX19

  R8

  Address of the current JDS entry

  R9

  Address of the current RESQUEUE entry

  R11

  Address of the current FCT entry

  R12

  Address of the TVTABLE entry

• IATUX29

  R11

  Address of the current FCT entry

  R13

  Address of the input-service data area for the current function.

Note that these register conventions are already set up when the exit is called. You must invoke EQQEXIT while these registers are unchanged.

If a shipped JES exit example (or the EQQEXIT macro) has been user–modified, make sure that it does not prevent or filter the tracking of Tivoli Workload Scheduler for z/OS itself.

See the NOTES section of the EQQEXIT prolog for information about the register contents that are destroyed by EQQEXIT in JES exits.