upx/BUGS
Markus F.X.J. Oberhumer 9131d5216f Welcome 2021.
2021-01-01 20:39:22 +01:00

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The Ultimate Packer for eXecutables
Copyright (c) 1996-2021 Markus Oberhumer, Laszlo Molnar & John Reiser
https://upx.github.io
Limitations and other things which are not (yet) supported:
===========================================================
djgpp2/coff
-----------
* all overlays (except Allegro pakfiles) are silently stripped
dos/exe
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* normal dos/exes with new exe headers
* max ~24000 relocation records (...should be enough for everyone ;-)
* exe + sys combined images
watcom/le
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* 16-bit selector alias fixups
* 16-bit offset relocation for objects larger than 4 KiB
* 16:16 fixups
If you need any of the above (they're very rare), send us an URL of a
test file.
* 16-bit objects are not loaded into DOS memory
* There is still a problem with the wdosx extender: if you compress a
watcom/le file which does NOT contain the wdosx extender, and after this
you bind the wdosx stub to the compressed file, then it will work.
Otherwise it won't.
* unpacked pmwlite compressed programs might not work when compressed
with UPX (this is a bug in pmwunlite)
win32/pe
--------
* writable shared sections (`--force' *may* work)
* certificates in the image
* compressing files which contain a big BSS requires lots of memory
during compression