Environment

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

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

The caller must meet the following requirements:

Caller variable	Caller value
Minimum Authorization	Problem 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, IAZSSJD 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 about an ESTAE-type recovery environment.

Figure 1 shows the environment at the time of the call for SSI function code 83, the JES device information services.

Figure 1. Environment at time of call for SSI Function Code 83, the JES device information services