Establishing enclave termination behavior for unhandled conditions

To establish enclave termination behavior when an unhandled condition of severity 2 or greater occurs, use one of the following methods:

The assembler user exit (see Invoking the assembler user exit and z/OS Language Environment Programming Guide)
POSIX signal default action (see z/OS Language Environment Programming Guide)
The ABTERMENC runtime option (discussed below)

The ABTERMENC runtime option sets the enclave termination behavior for an enclave ending with an unhandled condition of severity 2 or greater.

If you specify the IBM-supplied default suboption ABEND, Language Environment® issues an abend to end the enclave regardless of the setting of the CEEAUE_ABND flag. Additionally, the assembler user exit can alter the abend code, abend reason code, abend dump attribute, and the abend task/step attribute. For more information on using ABTERMENC, see z/OS Language Environment Programming Reference, and for more information on the assembler user exit, see z/OS Language Environment Programming Guide.

If you specify the RETCODE suboption, Language Environment uses the CEEAUE_ABND flag value set by the assembler user exit (which is called for enclave termination) to determine whether or not to issue an abend to end the enclave when an unhandled condition of severity 2 or greater occurs.