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echo: os2prog
to: Peter Fitzsimmons
from: Rinat Sadretdinow
date: 1995-12-29 15:20:40
subject: EXE compressor/encryptor for OS/2

Hello Peter!

Monday December 25 1995 00:11, Peter Fitzsimmons wrote to Andrew Ziem:


 AZ>> Is there anything to compress/encrypt OS/2 execubles
 AZ>> like PKLite, Diet, or Protect?

No, there are not such compressors existed for OS/2. It's rather difficult to
create stub that unpacks exe code, maps all the segments, relocates them and so
on like PkLite does. But it is possible. Guess no one will produce such
compressor, except he's crazy 

 PF> On devcon 8,  there is a program called REPACK to pack already-linked
 PF> programs.

Yes, but unfortunately REPACK does not pack all programs properly. Sometimes it
turns them into unexecutable stuff without possibility to restore original code
:-(

 PF> The caveat is that the new packing method is only for OS/2 3.0+.

Wrong, exe page type #5 is not supported by OS/2 system loader prior 2.99 only.
So very first OS/2 WARP versions can execute those files also. But 2.0 and 2.11
cannot.

Bye!
Rinat Sadretdinow

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