Three sample jobs are installed in the CEE.SCEESAMP target data set to help you modify the assembler language user exit. Two of the jobs use SMP/E USERMODs to replace the IBM-supplied installation-wide assembler user exits. The third sample job creates an application-specific assembler user exit that can be link-edited with applications that need its functions. You can create several different application-specific user exits, each in a different partitioned data set, to satisfy the needs of different application programs. Source code for the sample assembler user exits is installed as members in the CEE.SCEESAMP data set.

Use the information in z/OS Language Environment Programming Guide to assist you in modifying the IBM-supplied user exits or in creating your own.

If you specify runtime options in an assembler language user exit, they override all other sources of runtime options except those that are specified as NONOVR.

CEEBXITA performs functions for enclave initialization, normal and abnormal enclave termination, and process termination. CEEBXITA must be written in assembler language, because an HLL environment might not be established when the exit is invoked.