On invocation of the IXLLOCK exits, (complete, contention, and notify), the general purpose registers (GPRs) contain:

Register

Contents

0

Does not contain any information for use by the exit.

1

Address of a fullword containing the address of the exit parameter list.

2-12

Does not contain any information for use by the exit.

13

Address of a 72-byte work area for use by the exit routine. The exit routine does not have to and restore registers in this work area. The exit routine can use this work area in any way it chooses.

14

Return address of XES.

15

Entry point address