When control returns to the caller, the general purpose
registers (GPRs) contain:
- Register
- Contents
- 0-1
- Used as work registers by the system
- 2-13
- Unchanged
- 14
- Used as a work register by the system
- 15
- Contains the entry point address EZASOKET
When control returns to the caller, the access registers
(ARs) contain:
- Register
- Contents
- 0-1
- Used as work registers by the system
- 2-14
- Unchanged
- 15
- Used as a work register by the system.
If a caller depends on register contents to remain the
same before and after issuing a service, the caller must save the
contents of a register before issuing the service and must restore
them after the system returns control.