Dual Address Spaces and the Hardware Linkage Stack

Project and Program: Application Architecture Development and Integration, LE and Programming Languages

Tags: Proceedings , 2012 , SHARE in Atlanta 2012

This presentation will describe the architectural features that allow semi-privileged programs to communicate with address spaces other than their own. Topics include:

* A review (revue?) of architectural facilities

* ASN translation

* DAS instructions (EPAR, ESAR, MVCP, MVCS, basic and space-switching PC and PT, SAC, SACF, and SSAR)

* The Linkage Stack and related instructions (BAKR, EREG, ESTA, MSTA, PR, TAR)

* Enhancements with ESA/390

* Enhancements with ASN-and-LX-reuse facility (EPAIR, ESAIR, PTI, SSARI)

* Examples of z/OS interfaces, including sample programs. Dan Greiner, IBM Corporation

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