Безопасный просмотр: UPX: the Ultimate Packer for eXecutables

News

12 Dec 2011: UPX 3.08 has been released. It is a minor 3.0x maintenance release to version 3 whose major additions were:

optional LZMA compression
support for BSD systems

To know more about this release, see the detailed changelog. Please report all problems and bugs in our bug tracker.

Share and enjoy,
Markus, LГЎszlГі & John

Supported executable formats

Format full name	Format description
amd64-linux.elf amd64-linux.kernel.vmlinux	Linux ELF Linux kernel
arm-linux.elf arm-linux.kernel.vmlinux arm-wince.pe	Linux ELF Linux kernel Windows CE executable or DLL
armeb-linux.elf armeb-linux.kernel.vmlinux	Linux ELF Linux kernel
fat-darwin.macho	Mac OS X executable
i086-dos16.com i086-dos16.exe i086-dos16.sys	DOS 16-bit .com file DOS 16-bit executable DOS 16-bit .sys file
i386-bsd.elf.execve i386-darwin.macho i386-dos32.djgpp2.coff i386-dos32.tmt.adam i386-dos32.watcom.le i386-freebsd.elf i386-linux.elf i386-linux.elf.execve i386-linux.elf.shell i386-linux.kernel.bvmlinuz i386-linux.kernel.vmlinux i386-linux.kernel.vmlinuz i386-netbsd.elf i386-openbsd.elf i386-win32.pe	BSD generic Mac OS X executable DOS 32-bit COFF DOS 32-bit executable DOS 32-bit linear executable FreeBSD ELF Linux ELF Linux generic Linux shell script Linux kernel Linux kernel Linux kernel NetBSD ELF OpenBSD ELF Windows 32-bit executable or DLL
m68k-atari.tos	Atari TOS/MiNT executable
mips-linux.elf	Linux ELF
mipsel-linux.elf mipsel.r3000-ps1	Linux ELF PlayStation 1 executable
powerpc-darwin.macho powerpc-linux.elf powerpc-linux.kernel.vmlinux	Mac OS X executable Linux ELF Linux kernel

Overview

UPX achieves an excellent compression ratio and offers very fast decompression. Your executables suffer no memory overhead or other drawbacks for most of the formats supported, because of in-place decompression. UPX strengths in a nutshell:

excellent compression ratio: typically compresses better than WinZip/zip/gzip, use UPX to decrease the size of your distribution!
very fast decompression: ~10 MB/sec on an ancient Pentium 133, ~200 MB/sec on an Athlon XP 2000+.
no memory overhead for your compressed executables because of in-place decompression.
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.
portable: UPX is written in portable endian-neutral C++.
extendable: because of the class layout it's very easy to add new executable formats or new compression algorithms.
free: UPX is distributed with full source code under the GNU General Public License v2+, with special exceptions granting the free usage for commercial programs as stated in the UPX License Agreement.

You probably understand now why we call UPX the "Ultimate Packer for eXecutables". UPX aims to be commercial quality free software, based on experience with our previous packers (DJP, lzop, and the NRV library).

Download

File	OS/Hardware
upx308w.zip	Win32/i386
upx-3.08-i386_linux.tar.bz2	Linux/i386
upx-3.08-amd64_linux.tar.bz2	Linux/AMD64
upx-3.08-armeb_linux.tar.bz2	Linux/ARM
upx-3.08-mipsel_linux.tar.bz2	Linux/MIPS
upx-3.08-powerpc_linux.tar.bz2	Linux/PPC
upx308d.zip	DOS/i386
upx308a.zip	Atari TOS-MiNT/m68k
upx-3.08-src.tar.bz2	Source code (you will need UCL)

Just in case, here is the archive of old versions.

Legal terms

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.