Design complexity measurement and testing
Communications of the ACM
Linkers and Loaders
Elements of Software Science (Operating and programming systems series)
Elements of Software Science (Operating and programming systems series)
The GNU 64-bit PL8 compiler: toward an open standard environment for firmware development
IBM Journal of Research and Development
Contributions to the GNU compiler collection
IBM Systems Journal
Concurrent driver upgrade: method to eliminate scheduled system outages for new function releases
IBM Journal of Research and Development
z/CECSIM: an efficient and comprehensive microcode simulator for the IBM eServer z900
IBM Journal of Research and Development
Concurrent driver upgrade: method to eliminate scheduled system outages for new function releases
IBM Journal of Research and Development
Advanced firmware verification using a code simulator for the IBM System z9
IBM Journal of Research and Development
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When the PL8 64-bit GNU compiler collection front end was introduced with the IBM z990 system, it laid the foundation to move toward an open-standard development environment for the i390 layer of IBM System zTM host firmware. However, when the z990 system was developed, the proprietary project development library system and the table of contents object file format for i390 code were still being used. With the IBM System z9TM, we have moved to a fully open-standard development environment. This paper describes the steps we took to get there, to improve code performance, development efficiency, and regression testing, and to develop base functionality for important System z9 features such as enhanced driver maintenance. We also discuss plans to further enhance the development environment for future systems.