Environment of the exit

The exit receives control with these characteristics:

Problem program state
APF-authorized
TCB mode
Address Space Control mode=primary
AMODE(31)
RMODE(ANY)

The exit can change the characteristics during its processing. However, the exit must return to ICSF with the same characteristics as on entry.

When the single-record, read-write exit is called, the exit parameter block is in the caller's address space. The exit is loaded in the caller's address space. The caller is either the PCF conversion program, the utility program (CSFEUTIL), or an ICSF panel.