Masm & UPX error

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dacid

Joined: 31 Aug 2008
Posts: 57

dacid

have a problem compressing my MASM projects with UPX. About 80% give me "NotCompressibleException"...

What im using:

Windows Vista SP1 (x64)
Microsoft (R) Macro Assembler Version 6.14.8444
Microsoft (R) Incremental Linker Version 5.12.8078
UPX 3.03w

How im using it:

c:\masm32\bin\ml /c /coff /Cp /Ic:\masm32\include Project.asm
c:\masm32\bin\Link /SUBSYSTEM:CONSOLE /LIBPATH:c:\masm32\lib Project.obj
c:\upx\upx Project.exe

Quote:

Ultimate Packer for eXecutables
Copyright (C) 1996 - 2008
UPX 3.03w Markus Oberhumer, Laszlo Molnar & John Reiser Apr 27th 2008

File size Ratio Format Name
-------------------- ------ ----------- -----------
upx: Project.exe: NotCompressibleException

Packed 1 file: 0 ok, 1 error.

Same with "-f" or "--force" ... any ideas?

03 Sep 2008, 08:16

Grom PE

Joined: 13 Mar 2008
Posts: 114
Location: i@grompe.org.ru

Grom PE

Too small programs can't be compressed with UPX.

03 Sep 2008, 09:10

dacid

Joined: 31 Aug 2008
Posts: 57

dacid

yes, seems that files under 4k cant be compressed with upx.

03 Sep 2008, 13:38

dxl

Joined: 17 Sep 2005
Posts: 16

dxl

Probably you can decrease the size of your executable: using one pe section for example, i doubt it's containing 4k of code and data.
Put your uninitialized data at the end of your program

03 Sep 2008, 15:48

f0dder

Joined: 19 Feb 2004
Posts: 3170
Location: Denmark

f0dder

For compression tiny executables, have a look at crinkler.

04 Sep 2008, 23:21

dacid

Joined: 31 Aug 2008
Posts: 57

dacid

thx

05 Sep 2008, 12:50

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