This section describes each of the individual exits using the same
format. The format of the description is shown below.
- Functional Description
- provides an overview of the function or command that the exit
is for. It describes at what point in the function's or command's
processing the exit receives control. It also highlights how you
can use the exit.
- TSO/E-Supplied Exit
- describes the processing of the default TSO/E exit routine if
TSO/E provides one.
- Entry Specifications
- describes the contents of the registers on entry.
- Parameter Descriptions
- describes the contents of the parameter list that the exit receives
from the invoking program.
- Return Specifications
- describes what the registers must contain when the exit returns
control to the invoking program. It also describes the possible return
codes from the exit.
- Programming Considerations
- describes various considerations for writing the exit. It contains
information, such as whether the exit must be reentrant, refreshable,
and reusable, APF-authorization, and the TSO/E service routines the
exit can use. It also includes information about:
- Installing the exit, including:
- Naming conventions, if any
- Where the exit can reside (for example, STEPLIB, LPALIB)
- Linkage considerations.
- Environment
Includes the state and key that the exit executes
in, AMODE and RMODE requirements, and other operational considerations.
- Restrictions and Limitations
Lists any restrictions or limitations
for the exit itself or any effect on other system processing because
of exit processing.
- Possible Uses
- describes different tasks you can perform using the exit.