z/OS MVS Programming: Workload Management Services
Previous topic | Next topic | Contents | Index | Contact z/OS | Library | PDF


Output Register Information

z/OS MVS Programming: Workload Management Services
SC34-2663-00

Output Register Information

When control returns to the caller, the GPRs contain:

Register
Contents
0
Reason code if GR15 return code is non-zero
1
Used as work registers by the system
2-13
Unchanged
14
Used as work registers by the system
15
Return code

When control returns to the caller, the ARs contain:

Register
Contents
0-1
Used as work registers by the system
2-13
Unchanged
14-15
Used as work registers by the system

Some callers depend on register contents remaining the same before and after issuing a service. If the system changes the contents of registers on which the caller depends, the caller must save them before issuing the service, and restore them after the system returns control.

Go to the previous page Go to the next page




Copyright IBM Corporation 1990, 2014