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File No. S360-31
Form C28-6538-3 OS
Systems Reference Library
IBM System/3S0 Ope"rating System
Linkage Editor
This publication provides programmers
and systems analysts with the information
necessary to make effective use of the
linkage editor of IBM System/360 Operating
System. Included are descriptions of the
functions performed automatically by the
linkage editor as well as those performed
in responpe to control statements prepared
by the programmer."
The linkage editor combines and edits
modules to produce a single module that can
be loaded by the control program. The
linkage editor operates as a processing
program rather than as a part of the
control program.
PREFACE
This publication provides programmers
and systems analysts with information on
the operation and use of the linkage editor
of IBM System/360 Operating System. It is
part of an integrated library of IBM
System/360 Operating System publications.
Other publications that are required for an
understanding of linkage editor processing
are:
IBM System/360 Operating System: Intro-
duction, Form C28-6534
IBM System/360 Operating system: Con-
cepts and Facilities, Form C28-6535
The processing information required to
perform the linking functions of the link-
age editor is contained in the sections of
this publication titled "Object and Load
Modules," "Input Sources, Intermediate and
output storage," "Linking Input Modules,"
"Error Diagnostics and Processing Options,"
and "Diagnostic output and Special Process-
ing."
The program modification functions are
discussed in the sections titled "Editing
Object and Load Modules," "Designing An
Overlay Program," and "Specifying Addition-
al Processing."
Third Edition (October 1966)
This is a reprint of C28-6538-2 incorporating changes issued in Techni-
cal Newsletter N28-2130, dated June 1, 1966.
Significant changes or additions to the specifications contained in this
publication will be reported in subsequent revisions or 'Technical
Newsletters.
This publication was prepared for production using an IBM computer to
update the text and to control the page and line format. Page
impressions for photo-offset printing were obtained from an IBM 1403
Printer using a special print chain.
Requests for copies of IBM publications should be made to your IBM
representative or to the IBM branch office serving your locality.
A form is provided at the back of this publication for reader's
comments. If the form has been removed, comments may be addressed to
IBM Corporation, Programming Systems Publications, Department D58,
PO Box 390, Poughkeepsie, N. Y. 12602
CONTENTS
INTRODUCTION 7 LET and Exclusive Call (XCAL)
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