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File No. S360-31
GY28-2031-3

Program Logic

Version B.1

IBM System/360 Time Sharing System
Dynamic Loader

Follows the organization of the dynamic loader in
the descriptions of the loading, unloading, and special
service routines. Library maintenance, a housekeeping
function not part of the dynamic loader proper, is also
discussed.

This manual is directed to persons involved in
program maintenance, and system programmers who are
altering the program design. . It can be used to locate
specific areas of the program, and it enables the
reader to relate these areas to the corresponding
program listings. Program logic information is not
necessary for program operation and use.
The dynamic loader assigns virtual storage for a
task's program modules and resolves address constants
for those pages referred to at execution time. In
addition, the dynamic loader deletes modules from the
task and performs several housekeeping functions.

Before using this publication, the reader must be
familiar with the contents of:

IBM System/360 Time Sharing System: concepts and
Facilities, GC28-2003

IBM System/360 Time Sharing System: Assembler
Language, GC28-2000
Fourth Edition (September 1971)

This is a revision of, and makes obsolete, GY2B-2031-2 and
Technical Newsletter GN28-3128. This edition contains the
following changes: