2019-01-11 16:22:56 +00:00
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ooooo ooo ooooooooo. ooooooo ooooo
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`888' `8' `888 `Y88. `8888 d8'
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888 8 888 .d88' Y888..8P
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888 8 888ooo88P' `8888'
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888 8 888 .8PY888.
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`88. .8' 888 d8' `888b
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`YbodP' o888o o888o o88888o
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2000-05-19 16:04:55 +00:00
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The Ultimate Packer for eXecutables
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2022-08-19 22:47:00 +00:00
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Copyright (c) 1996-2022 Markus Oberhumer, Laszlo Molnar & John Reiser
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2016-09-19 20:41:32 +00:00
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https://upx.github.io
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2000-05-19 16:04:55 +00:00
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2000-12-20 12:03:14 +00:00
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2000-05-19 16:04:55 +00:00
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WELCOME
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=======
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2002-07-16 16:00:58 +00:00
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Welcome to UPX !
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2000-05-19 16:04:55 +00:00
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2022-10-27 14:00:13 +00:00
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UPX is a free, secure, portable, extendable, high-performance
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executable packer for several executable formats.
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2000-05-19 16:04:55 +00:00
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INTRODUCTION
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============
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UPX is an advanced executable file compressor. UPX will typically
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reduce the file size of programs and DLLs by around 50%-70%, thus
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reducing disk space, network load times, download times and
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other distribution and storage costs.
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Programs and libraries compressed by UPX are completely self-contained
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and run exactly as before, with no runtime or memory penalty for most
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of the supported formats.
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UPX supports a number of different executable formats, including
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2022-09-06 16:21:10 +00:00
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Windows programs and DLLs, macOS apps and Linux executables.
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2000-05-19 16:04:55 +00:00
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UPX is free software distributed under the term of the GNU General
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Public License. Full source code is available.
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UPX may be distributed and used freely, even with commercial applications.
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2022-10-27 14:00:13 +00:00
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See the UPX License Agreements for details.
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2000-05-19 16:04:55 +00:00
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2020-12-03 01:10:05 +00:00
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SECURITY CONTEXT
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================
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IMPORTANT NOTE: UPX inherits the security context of any files it handles.
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This means that packing, unpacking, or even testing or listing a file requires
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2021-01-09 17:04:47 +00:00
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the same security considerations as actually executing the file.
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2020-12-03 01:10:05 +00:00
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Use UPX on trusted files only!
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2000-05-19 16:04:55 +00:00
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SHORT DOCUMENTATION
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===================
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2006-04-26 21:07:01 +00:00
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'upx program.exe' will compress a program or DLL. For best compression
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2022-09-06 16:21:10 +00:00
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results try 'upx --best program.exe' or 'upx --brute program.exe'.
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2000-05-19 16:04:55 +00:00
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Please see the file UPX.DOC for the full documentation. The files
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NEWS and BUGS also contain various tidbits of information.
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THE FUTURE
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==========
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2022-09-06 16:21:10 +00:00
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- Stay up-to-date with ongoing OS and executable format changes.
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2000-05-19 16:04:55 +00:00
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2022-09-06 16:21:10 +00:00
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- RISC-V 64 for Linux.
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2000-05-19 16:04:55 +00:00
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- We will *NOT* add any sort of protection and/or encryption.
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This only gives people a false feeling of security because
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2022-09-06 16:21:10 +00:00
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all "protectors" can be broken by definition.
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2000-05-19 16:04:55 +00:00
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2022-09-06 16:21:10 +00:00
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- Fix all remaining bugs - please report any issues
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https://github.com/upx/upx/issues
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2000-05-19 16:04:55 +00:00
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COPYRIGHT
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=========
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2022-08-19 22:47:00 +00:00
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Copyright (C) 1996-2022 Markus Franz Xaver Johannes Oberhumer
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Copyright (C) 1996-2022 Laszlo Molnar
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Copyright (C) 2000-2022 John F. Reiser
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2000-05-19 16:04:55 +00:00
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This program may be used freely, and you are welcome to
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redistribute it under certain conditions.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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2022-10-27 14:00:13 +00:00
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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UPX is distributed with full source code under the terms of the
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GNU General Public License v2+;
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either under the pure GPLv2+ (see the file COPYING),
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or (at your option) under the GPLv+2 with special exceptions and
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restrictions granting the free usage for commercial
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programs (see the file LICENSE).
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You should have received a copy of the UPX License Agreements along
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with this program; see the files COPYING and LICENSE. If not,
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visit the UPX home page.
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2000-05-19 16:04:55 +00:00
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Share and enjoy,
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2016-12-02 05:49:36 +00:00
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Markus & Laszlo & John
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2000-05-19 16:04:55 +00:00
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2008-01-02 09:12:42 +00:00
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Markus F.X.J. Oberhumer Laszlo Molnar
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2016-09-28 10:25:01 +00:00
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<markus@oberhumer.com> <ezerotven+github@gmail.com>
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2000-05-19 16:04:55 +00:00
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2016-12-02 05:49:36 +00:00
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John F. Reiser
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<jreiser@BitWagon.com>
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2000-05-19 16:04:55 +00:00
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[ The term UPX is a shorthand for the Ultimate Packer for eXecutables
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and holds no connection with potential owners of registered trademarks
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or other rights. ]
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