Broken resource-only dlls, build with FASM above 1.69.14

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addhaloka

Joined: 23 Oct 2013
Posts: 9

addhaloka 29 Feb 2016, 07:03

For example - drive buttons dll for Total Commander or localization dll for WinRAR. This question has long been interested in the now mostly theoretical, but all the same I would like to find out what wrong.

Example (drive buttons dll):

make.bat:

Code:

@echo off
set MASM32=F:\masm32
set "PATH=%MASM32%\bin;%PATH%"
set "INCLUDE=%MASM32%\include;%INCLUDE%"
rc /l 0x409 rsrc.rc
:: old fasm 1.69.14 and below - working dll
FASM16914.EXE Lubuntu14.asm Lubuntu14.dll
:: new versions above 1.69.14 - not working
:: FASM.EXE Lubuntu14.asm Lubuntu14.dll
del *.obj,*.res
pause

Lubuntu14.asm:

Code:

format PE GUI 4.0 DLL
section '.rsrc' data readable resource from 'rsrc.res'

rsrc.rc:

Code:

DISK35 BITMAP DISCARDABLE "Bitmap_1.bmp"
DISK525 BITMAP DISCARDABLE "Bitmap_2.bmp"
DISKCDROM BITMAP DISCARDABLE "Bitmap_3.bmp"
DISKCOMPUTER BITMAP DISCARDABLE "DISKCOMPUTER.bmp"
DISKDOCUMENTS BITMAP DISCARDABLE "DISKDOCUMENTS.bmp"
DISKFTP BITMAP DISCARDABLE "Bitmap_4.bmp"
DISKHDD BITMAP DISCARDABLE "Bitmap_5.bmp"
DISKNET BITMAP DISCARDABLE "Bitmap_6.bmp"
DISKNETHOOD BITMAP DISCARDABLE "Bitmap_7.bmp"
DISKNETX BITMAP DISCARDABLE "Bitmap_8.bmp"
DISKRAM BITMAP DISCARDABLE "Bitmap_9.bmp"
DISKREMOVE BITMAP DISCARDABLE "Bitmap_10.bmp"

29 Feb 2016, 07:03

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20759
Location: In your JS exploiting you and your system

revolution 29 Feb 2016, 07:49

What do you mean by not working? Gives an error? Generates a bad file? Crashes? Something else?

29 Feb 2016, 07:49

addhaloka

Joined: 23 Oct 2013
Posts: 9

addhaloka 29 Feb 2016, 09:42

Just do not display resources, i.e the program works with the dll, does not see them - WinRAR is not picked up in the localization file "RarLng.dll", similarly in TweakTC (tweaker for TC) does not see buttons dll - screen: http://s1.bild.me/bilder/030315/1605317_0.png

29 Feb 2016, 09:42

l_inc

Joined: 23 Oct 2009
Posts: 881

l_inc 29 Feb 2016, 13:00

addhaloka
My guess is that the older fasm versions forget to set the flag IMAGE_FILE_RELOCS_STRIPPED . Add the following lines at the end, and it should work fine with the newer versions:

Code:

section '.reloc' data readable discardable
data fixups
end data
rd 1

_________________
Faith is a superposition of knowledge and fallacy

29 Feb 2016, 13:00

addhaloka

Joined: 23 Oct 2013
Posts: 9

addhaloka 29 Feb 2016, 15:01

l_inc
Thanks. Everything right, so it turns out working dll. I just did not think that relocations might have importance for resource-only dll. Confused

29 Feb 2016, 15:01

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