IBM OS/390 manual User Exits and Abnormal Termination Exits, Assembler User Exits, Ceecxita Cics

Table 43 (Page 2 of 2). Option Recommendations Differing between

LE/VSE 1.4 and OS/390 Language Environment

Language	Option	Recommendation
PL/I	ABTERMENC	RETCODE
	DEPTHCONDLMT	0
	STACK	128K,128K,BELOW,KEEP
	TERMTHDACT	TRACE

17.5.2 User Exits and Abnormal Termination Exits

This section discusses migration considerations for user and abnormal termination exits, and the similarities and differences between the exits for OS/390 Language Environment and LE/VSE.

17.5.2.1 Assembler User Exits

Three default assembler user exits are provided with LE/VSE. They are:

∙

∙

∙

CEEBXITA (batch)

CEECXITA (CICS)

CEEBX05A (VS COBOL II compatibility)

The default CEEBXITA is linked into the distributed batch initialization/termination phases (CEEBINIT and CEEPIPI); the default CEECXITA is linked into the distributed CICS library support routines phase, CEECCICS.

You can customize these exits to suit your requirements and link them directly to applications for use on an application-specific basis.

OS/390 Language Environment provides default assembler exits with the same names as these, and they also are linked into the batch and CICS initialization and termination load modules, and the CICS support routine load module.

However, these assembler exits may not perform exactly the same functions when invoked in OS/390 Language Environment as in LE/VSE. If you rely on the function of the default assembler exits, you should examine the OS/390 Language Environment versions to ensure they do what you require.

If you have customized your own assembler exits in LE/VSE, you can make the same customization in OS/390 Language Environment.

OS/390 Language Environment also provides a default assembler user exit for TSO, CEEBXITC, which you may find useful.

17.5.2.2 High-Level Language Exits

A sample High-Level Language (HLL) exit is provided in both LE/VSE and OS/390 Language Environment. This is CEEBINT. In both cases, it does nothing except return to the caller.

You can compile as many of your own HLL exits as you wish, in LE/VSE and in OS/390 Language Environment. In OS/390 Language Environment as in LE/VSE, you can write an HLL exit in C, PL/I or Language Environment-conforming Assembler language, but not in COBOL.

Note: You cannot write an HLL exit in C, for use in LE/VSE 1.1.

364VSE to OS/390 Migration Workbook