z/TPF Program Management - IBM
z/TPF Program Management - IBM
z/TPF Program Management - IBM
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z/<strong>TPF</strong> loaders<br />
Loader general file<br />
A loader is a tool for introducing new or modified system components, programs,<br />
files, or data to a z/<strong>TPF</strong> system. All loaders have both an online and offline<br />
component.<br />
Offline Component<br />
Takes system components, programs, files, or data from the hierarchical file<br />
system (HFS) data sets and writes them to a storage medium such as tape,<br />
DASD, virtual reader, or user-defined device.<br />
Online Component<br />
Takes the system components, programs , files, or data from the storage<br />
medium and loads them to their correct location on the online system.<br />
The load functions of a z/<strong>TPF</strong> system are handled by the general file loader, data<br />
loader, E-type loader, and image loader. Only the general file loader is used for an<br />
initial full load (see “Load system components to a new z/<strong>TPF</strong> system” on page 73).<br />
When you have completed a full load, you do not need to do another except for<br />
some DASD configuration or core image restart (CIMR) changes.<br />
The loader general file (LGF) contains the program and keypoints that are needed<br />
to start or restart the system. The following list shows the loader general file<br />
contents:<br />
v IPLA and the volume ID (VOLID)<br />
Note: This copy of IPLA is used when the loader general file is IPLed.<br />
v Keypoints from an HFS object library<br />
v IPLA<br />
Note: This copy of IPLA is loaded to online modules.<br />
v IPLB<br />
v Core image restart (CIMR) area components<br />
– Control program (CP)<br />
– In-core dump formatter (ICDF) program<br />
– Online component of the general file loader (ACPL)<br />
– Global synchronization table (SIGT)<br />
– Record ID attribute table (RIAT)<br />
– File address compute program table (FCTB)<br />
– USR1<br />
– USR2<br />
v E-type programs and data records<br />
– E-type programs from an HFS object library<br />
– Loader control record (LDCRL)<br />
– <strong>Program</strong> attribute table (PAT).<br />
Note: The general file loader (ALDR) does not load files. The ALDR loads a<br />
sufficient subset of z/<strong>TPF</strong> programs and application programs to an image<br />
so that after an initial program load (IPL) is performed, online image load<br />
processing can occur from that image. These programs are not file<br />
dependent.<br />
© Copyright <strong>IBM</strong> Corp. 2005, 2012 19
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