Rational Developer for System z
Enterprise PL/I for z/OS, Version 3.8, Migration Guide

Assembler considerations for PL/I applications

Considerations for assembler programs mimicking PL/I main procedures
Calling PL/I from assembler and Language Environment conforming assembler
Condition handling and assembler programs
Considerations for using assembler user exits
Specific considerations

This chapter contains information for applications that contain mixed PL/I programs and assembler programs. It includes information on:

The new compiler uses some different internal control blocks in its generated code than did the old compiler. If you had assembler code that knew the layout and meaning of such control blocks, that code is highly likely not to work now and will probably have to be changed. Some examples where where these differences would require code changes:


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