Sockets API output register information

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

For synchronous calls, it contains the entry point address of EZBSOH03.
For asynchronous calls, see Task management and asynchronous function processing.

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 restore them after the system returns control.