System i: Programming i5/OS PASE - IBM

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“Related information for i5/OS PASE” on page 70
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i5/OS PASE overview
i5/OS Portable Application Solutions Environment (i5/OS PASE) enables you to run many of your AIX
applications on the i5/OS operating system with little or no change, and effectively expands your
platform solution portfolio.
Cross-platform application development and deployment are crucial components of any effective business
computing environment. Equally important are the ease of use and integration of functions that your
System i model offers. As your business moves into an increasingly open computing environment, you
are likely to find that achieving these often divergent goals can be difficult, time-consuming, and
expensive. For instance, you might want the benefit of a familiar application that runs on and makes use
of the capabilities of the AIX operating system, but you do not want the added burden of managing both
the AIX and i5/OS operating systems.
This is where i5/OS PASE helps.
i5/OS PASE concepts
i5/OS Portable Application Solutions Environment (i5/OS PASE) is an integrated runtime environment
for AIX applications running on the i5/OS operating system.
i5/OS PASE supports the application binary interface (ABI) of AIX and provides a broad subset of the
support provided by AIX shared libraries, shells, and utilities. i5/OS PASE also supports the direct
processing of IBM PowerPC ® machine instructions, so it does not have the drawbacks of an environment
that only emulates the machine instructions.
i5/OS PASE applications:
v Can be written in C, C++, Fortran, or PowerPC assembler
v Use the same binary executable format as AIX PowerPC applications
v Run in an i5/OS job
v Use i5/OS system functions, such as file systems, security, and sockets
Keep in mind that i5/OS PASE is not a UNIX ® operating system on the i5/OS operating system. i5/OS
PASE is designed to run AIX programs on the i5/OS operating system with little or no change. Programs
from any other environment, such as UNIX or Linux, need to be written such that they can be compiled
on AIX as the first step toward running in i5/OS PASE.
The i5/OS PASE integrated run time runs on the Licensed Internal Code kernel on the i5/OS operating
system. The system provides integration of many common i5/OS functions across i5/OS PASE and other
runtime environments (including Integrated Language Environment ® (ILE) and Java ). i5/OS PASE
implements a broad subset of AIX system calls. System support for i5/OS PASE enforces system security
and integrity by controlling what memory an i5/OS PASE program can access and restricting the
program to use only unprivileged machine instructions.
i5/OS PASE 3