ooooo ooo ooooooooo. ooooooo ooooo `888' `8' `888 `Y88. `8888 d8' 888 8 888 .d88' Y888..8P 888 8 888ooo88P' `8888' 888 8 888 .8PY888. `88. .8' 888 d8' `888b `YbodP' o888o o888o o88888o The Ultimate Packer for eXecutables Copyright (c) 1996-1998 Markus Oberhumer & Laszlo Molnar http://cdata.tvnet.hu/~ml/upx.html http://wildsau.idv.uni-linz.ac.at/mfx/upx.html .__.. , , [__]|_ __-+-._. _. _.-+- | |[_)_) | [ (_](_. | 컴컴컴컴컴컴컴컴컴컴컴컴 UPX is a portable, extensible, high-performance executable packer for five different executable formats. It achieves an excellent compression ratio and offers *very* fast decompression. Your executables suffer no memory overhead or other drawbacks. .__ . | \* __ _.| _.*._ _ _ ._. |__/|_) (_.|(_]|[ | )(/,[ 컴컴컴컴컴컴컴컴컴컴컴컴컴� This is a beta-test release, so DO NOT USE THIS VERSION EXCEPT FOR TESTING. Only compress backups of your executables. Be prepared for crashes and other nasty surprises. This version is not compatible with any previous or future release ! UPX comes with ABSOLUTELY NO WARRANTY; for details see the file LICENSE. Having said that, we think that UPX is quite stable. Indeed we have compressed lots of files without any problems. Also, the current version has undergone 2 months of internal beta testing. Please report all problems or suggestions to the authors. Thanks. ._. , . , | ._ -+-._. _ _|. . _.-+-* _ ._ _|_[ ) | [ (_)(_](_|(_. | |(_)[ ) 컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴 UPX is a versatile executable packer with the following features: - excellent compression ratio: compresses better than zip/gzip, use UPX to decrease the size of your distribution ! - very fast decompression: about 10 MB/sec on a P133 - no memory overhead for your compressed executables - safe: you can list, test and unpack your executables Also, a checksum of both the compressed and uncompressed file is maintained internally. - universal: UPX can pack a number of executable formats: dos/exe, dos/sys, dos/com, djgpp2/coff and watcom/le (supporting DOS4G, PMODE/W, DOS32a and CauseWay) - portable: UPX is written in portable endian-neutral C++ (the official version is compiled with djgpp, but we are indeed partly developing it under Linux) - extensible: because of the class layout it's very easy to add new executable types or new compression algorithms [ - free: the final version will be distributed with full source code under the GNU General Public License (GPL) ] You probably understand now why we call UPX the "ultimate" executable packer... __ . / ` _ ._ _ ._ _ _.._ _| __ \__.(_)[ | )[ | )(_][ )(_]_) 컴컴컴컴컴컴컴컴컴컴컴컴컴컴� The default compression level is `-7'. Note that compression level `-9' can be quite slow for some files. [ to be written ] .__. , | |._ -+-* _ ._ __ |__|[_) | |(_)[ )_) 컴� |컴컴컴컴컴컴컴� `-q': be quiet `-q -q' (or `-qq'): be very quiet [ to be written ] . . , ._ . / |\ | _ -+- _ __ |, _ ._. _| _ __ / _ \./ _ | \|(_) | (/,_) | (_)[ (_](_)_) / (/,/'\(/, 컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴 dos/exe stands for all "normal" 16-bit DOS executables. UPX also handles overlays like other exepackers do: it simply copies the overlay after the compressed image. This works with some files, but doesn't work with others. UPX won't work with files that want to read data from themselves (like some WIN95 i.e. DOS 7 exes). Compressed programs only work on a 286+. . . , ._ . / |\ | _ -+- _ __ |, _ ._. _| _ __ / _. _ ._ _ | \|(_) | (/,_) | (_)[ (_](_)_) / (_.(_)[ | ) 컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴 UPX won't work with files that want to read data from themselves (like some WIN95 i.e. DOS 7 coms). Compressed programs work on any 8086+. Maximum uncompressed size: ~65100 bytes. . . , ._ . / |\ | _ -+- _ __ |, _ ._. _| _ __ / __ . __ | \|(_) | (/,_) | (_)[ (_](_)_) / _) \_|_) 컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴 _| 컴 You can only compress plain sys files, sys/exe (two in one) combos not supported. Compressed programs only work on a 286+. Maximum uncompressed size: ~65350 bytes. . . , ._ . / ._._ |\ | _ -+- _ __ |, _ ._. _| * _ ._ ._ / _. _ |,|, | \|(_) | (/,_) | (_)[ (_] |(_][_)[_)/ (_.(_)| | 컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴 ._|._|| | 컴컴컴컴컴컴컴 It is recommended to use UPX instead of strip - strip has the very bad habit of replacing your stub with it's own (old) version. UPX also corrects a bug (feature?) in strip v2.8+: it will fix the 4 KByte aligment of the stub. Also, UPX includes the full functionality of stubify. Extra options available for this executable format: -c produce COFF output instead of EXE. By default UPX keeps your current stub UPX handles Allegro packfiles. The DLM format is not supported. Maximum .text section size: 8 MBytes. BTW, UPX is the successor of the DJP executable packer. . . , ._ , / . |\ | _ -+- _ __ |, _ ._. . , _.-+- _. _ ._ _ / | _ | \|(_) | (/,_) | (_)[ \/\/ (_] | (_.(_)[ | )/ |(/, 컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴� UPX has been successfully tested with the following extenders: DOS4G, DOS4GW, PMODE/W, DOS32a, CauseWay. WDOS/X doesn't work yet. UPX compresses *much* better than PMWLITE. Try it ! Extra options available for this executable format: -c produce an unbound LE output instead of keeping the current stub LX format is not yet supported. Maximum code object size: 8 MBytes. DLLs are not supported. .___.. . | |_ _.._ ;_/ __ | [ )(_][ )| \_) 컴컴컴컴컴컴컴컴컴컴 DJ Delorie for DJGPP. Charles W. Sandmann for the ideas with the stubless decompressor. Joergen Ibsen for the address optimization idea. Salvador Eduardo Tropea for the beta testing. Linus for Linux. Natascha __ . , / ` _ ._ .._.* _ |_ -+- \__.(_)[_)\_|[ |(_][ ) | 컴컴컴 |컴._|컴컴._|컴컴� Copyright (C) 1996-1998 Markus Franz Xaver Johannes Oberhumer Copyright (C) 1996-1998 Laszlo Molnar This program may be used freely, and you are welcome to redistribute it under certain conditions. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the UPX License Agreement for more details. You should have received a copy of the UPX License Agreement along with this program; see the file LICENSE. If not, visit the UPX Homepage. [ We are planning to distribute UPX under the terms of the GNU General Public License (GPL) once we think it is ready for public source code release. ]