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The Ultimate Packer for eXecutables

http://wildsau.idv.uni-linz.ac.at/mfx/upx.html

http://www.nexus.hu/upx

http://upx.tsx.org

PLEASE CAREFULLY READ THIS LICENSE AGREEMENT, ESPECIALLY IF YOU PLAN TO MODIFY THE UPX SOURCE CODE

OR USE A MODIFIED UPX VERSION. ABSTRACT

========

UPX and UCL are copyrighted software distributed under the terms of the GNU General Public License (hereinafter the "GPL").

The stub which is imbedded in each UPX compressed program is part of UPX and UCL, and contains code that is under our

copyright. The terms of the GNU General Public License still apply as compressing a program is a special form of linking with our

stub.

As a special exception we grant the free usage of UPX for all executables, including commercial programs. See below for details

and restrictions.

=========

UPX and UCL are copyrighted software. All rights remain with the authors.

GNU GENERAL PUBLIC LICENSE

==========================

UPX and the UCL library are free software; you can redistribute them and/or modify them under the terms of the GNU General

Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later

version.

UPX and UCL are distributed in the hope that they will be useful, but WITHOUT ANY WARRANTY; without even the implied

warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more

details.

You should have received a copy of the GNU General Public License along with this program; see the file COPYING.

SPECIAL EXCEPTION FOR COMPRESSED EXECUTABLES

============================================

The stub which is imbedded in each UPX compressed program is part of UPX and UCL, and contains code that is under our

copyright. The terms of the GNU General Public License still apply as compressing a program is a special form of linking with our

stub.

Hereby Markus F.X.J. Oberhumer and Laszlo Molnar grant you special permission to freely use and distribute all UPX

compressed programs (including commercial ones), subject to the following restrictions:

1. You must compress your program with a completely unmodified UPX version; either with our precompiled version, or (at your

option) with a self compiled version of the unmodified UPX sources as distributed by us.

2. This also implies that the UPX stub must be completely unmodfied, i.e. the stub imbedded in your compressed program must

be byte-identical to the stub that is produced by the official unmodified UPX version.

3. The decompressor and any other code from the stub must exclusively get used by the unmodified UPX stub for

decompressing your program at program startup. No portion of the stub may get read, copied, called or otherwise get

used or accessed by your program.

ANNOTATIONS

===========

● You can use a modified UPX version or modified UPX stub only for programs that are compatible with the GNU General

Public License. - We grant you special permission to freely use and distribute all UPX compressed programs. But any

modification of the UPX stub (such as, but not limited to, removing our copyright string or making your program non-

decompressible) will immediately revoke your right to use and distribute a UPX compressed program.

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