Environment

The caller (issuer of the IEFSSREQ macro) must include the following mapping macros:

Data areas commonly referenced are mapped by the following mapping macros:

The caller must meet the following requirements:

Variable	Value
Minimum Authorization	Supervisor state, any PSW key
Dispatchable unit mode	Task
AMODE	24-bit or 31-bit
Cross memory mode	PASN=HASN=SASN
ASC mode	Primary
Interrupt status	Enabled for I/O and external interrupts
Locks	No locks held
Control Parameters	The SSOB, SSIB, IAZSSJI, and IAZDSERV control blocks can reside in 24- or 31-bit virtual storage
Recovery	The caller should provide an ESTAE-type recovery environment. See z/OS MVS Programming: Assembler Services Guidefor more information on an ESTAE-type recovery environment

Figure 1 shows the environment at the time of the call for SSI function code 71, Checkpoint Versions Subfunction.

Figure 1. Environment at Time of Call for SSI Function Code 71, Checkpoint Versions Subfunction