Laszlo released a beta version of the first upx executable for ARM devices. The program is without UI so have to use the command line.
Download
As example you can make following:
1.) start
nOpen
2.) e.g.
File:
\Storage Card\upx.exe
Command line:
-9 \Storage Card\Test.exe
or
File:
\Storage Card\upx.exe
Command line:
-d \Storage Card\Test.exe
OK
PS: -9 = compression level 9, -d = decompress
Please read the UPX.DOC (Win32DOS) for the full documentation.