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UPXDUMP

Description

In tradition of our products released earlier UPXDUMP is a small tool serving only one specific purpose. UPXDUMP is a replacement for the undocumented --file-info option in the free, high-performance executable packer UPX.

The main reason to write UPXDUMP was to show a file's compression method in a human-readable manner. A second reason was to practice Pascal programming. Yes, really!

UPXDUMP can also handle malformed executables created by a broken DOS port of UPX 2.93. (upx --file-info fails on these.)

UPXDUMP comes in these variants:

A small 16-bit version (file dos16\upxdump.exe) suitable for DOS computer systems prior to the 80386 microprocessor.
For newer DOS systems there is a 32-bit version (file dos32\upxdump.exe), that additionally supports long file names.
For Windows systems there is a 32-bit console version (file win32\upxdump.exe).

Otherwise there is no difference between these variants.

System requirements

For the 16-bit DOS version

Intel 8086/88 microprocessor (or compatibles)
Microsoft MS-DOS 3.0 (or compatibles)

For the 32-bit DOS version

Intel 80386 microprocessor (or compatibles)
Microsoft MS-DOS 3.0 (or compatibles)
32-bit DPMI server (e.g. CWSDPMI)
optional: LFN API (e.g. DOSLFN) for long file name support

For the 32-bit Windows console version

Intel 80386 microprocessor (or compatibles)
Microsoft Windows 95 (or compatibles)

Version history

19-NOV-2017

added executable formats (UPX_F_VMLINUZ_ARMEL to UPX_F_LINUX_ELF64_ARM and UPX_F_DYLIB_PPC32)
updated lots of names of executable formats
added Windows console version
increased size of read buffer from 16,384 to 65,528 bytes
made 32RTM signature detection more robust
added memory check to avoid (theoretical) crashes
added error exit codes 5 (ERR_FILE_SIZE) and 6 (ERR_NO_MEM) for easier batch processing
error messages now always contain the word "Error" for easier batch processing
on checksum mismatch also print the word "Warning"
options /h and -h are now recognized for the help screen
rewritten parts of the manual

19-APR-2009

first public release

Downloads

Version 19-NOV-2017

Binaries + Manual: upxdumpb_2017-11-19.zip (68.9 Kbytes)
Source code (Turbo Pascal / Free Pascal): upxdumps_2017-11-19 (16.3 Kbytes)

Version 19-APR-2009

Binaries + Manual: upxdumpb_2009-04-19.zip (46.4 Kbytes)
Source code (Turbo Pascal / Free Pascal): upxdumps_2009-04-19.zip (15.0 Kbytes)

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