The IATXCUE macro can be used to generate reentrant installation exit linkage into mainline code.When the module entry point is to be located from the installation exit list mapped by the IATYUXL macro (that is, when EPLOC=UXL is specified on the IATXCUE macro), you must include your exit routine in the list mapped by IATYUXL.You must also reassemble and link-edit the DSP dictionary (modules IATGRUX, IATGRPT and IATGRPTF, if necessary). Also, you must reassemble and link-edit modules IATGRPT and IATGRPTF, which contain the installation exit list, and module IATGRUX, which loads the installation exits.Additionally, the IATYTVT and IATYREG mapping macros are required.

If you use the IATXCUE macro with BALR linkage, the called exit must return to the ERROR return with a simple branch return (+0 after the call), and return to the NORMAL return with a displacement of 4 (+4 after the call). See Introduction for more information on the IATXCUE macro.