TECHNICAL INFORMATION DOCUMENT

TITLE:  PTF253 - Crash Patch for 4MB Page Size
DATE:  11SEP95
README FOR:  PTF253
PRODUCT and VERSION:

UnixWare 1.1

Installation Instructions:  

DATATYPE: datastream

1. Download the ptf253.Z and ptf253.txt files to the /tmp directory  
   on your machine.

2. Read the release notes contained in this file and follow the 
   instuctions to add the package to your system.

3. Now become root, uncompress the file and add the package to your 
   system using the following commands:

        $ su
        # uncompress /tmp/ptf253.Z
        # pkgadd -d /tmp/ptf253

ENGINEERING RELEASE NOTES
-------------------------

PTF253 OVERVIEW
---------------

Title
-----

PTF253 - Crash Patch for 4MB Page Size

Version
-------
1.0

Date
----

23MAR95

Information Type
----------------

Symptom Solution

Product And Version
-------------------

UnixWare 1.1.3.

Abstract
--------

Installs a new crash utility that correctly handles the Pentium 4MB Page
Size Extensions.

Symptom
--------

Immediately upon being invoked, crash prints the message:

	... is an invalid address

and exits.



SOLUTION SPECIFICS
------------------

General Description.
-------------------

When used to analyze a system memory image (either active or crashed) of
a system with Update 1.1.3 installed and a Pentium processor, crash is
unable to map virtual addresses to physical addresses due to the
difference in the page tables.  This patch installs a new crash utility
with changes to correctly interpret the modified page tables.


New Features.
------------

None

Software Notes and Recommendations.
----------------------------------

This patch should be installed on all UnixWare 1.1.3 systems that have
the Advanced Commands (cmds) package installed.

Testing of the modified software contained in this package has been
conducted only to the extent necessary to confirm that it resolves the
problem(s) stated above ("Symptom").  Such testing consists of
recreating the problem conditions and verifying that the problem 
no longer occurs.  No other testing of this software has been done.

Hardware Notes and Recommendations.
----------------------------------

This PTF is targeted for the i386, i486 and Pentium CPU's.

Installation Instructions.
-------------------------

This PTF consists of 1 3.5 inch floppy.  Insert the floppy into the drive
and, while logged in as root, type

	pkgadd -d diskette1

and follow the instructions output by pkgadd.