Make the Request with the IEFSSREQ Macro

When you have set up the environment and built the necessary control blocks, you are ready to issue the IEFSSREQ macro to make the request. There are no parameters on the IEFSSREQ macro; the SSOB, SSOB function dependent area (if provided), and SSIB provide the information the SSI and the subsystem need to perform their function.

Input Register Information

Before issuing the IEFSSREQ macro, the caller must ensure that the following registers contain the specified information:

Register: Contents
1: Address of a one-word parameter list that has the high-order bit on and a pointer to the SSOB control block in the low-order 31 bits.
13: Address of a standard 18-word save area.

Syntax of IEFSSREQ

The syntax of the IEFSSREQ macro is:

[symbol]                  IEFSSREQ

where symbol is any valid assembler language symbol. Note that one or more blanks are required before and after IEFSSREQ.

Figure 1 shows the environment when you make a subsystem request.

Figure 1. Making a Subsystem Request