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Index > Main > Why do PE sections have a name?

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ChrisLeslie



Joined: 04 Jun 2006
Posts: 50
Location: Australia
ChrisLeslie
Why is there a requirement to have a quoted text name for each PE section. I cannot find any reference to a function for the names, so why are they part of the assembler?

Chris
Post 23 Feb 2007, 03:35
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Chewy509



Joined: 19 Jun 2003
Posts: 297
Location: Bris-vegas, Australia
Chewy509
For the final linking stage before execution.
Post 23 Feb 2007, 03:43
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ChrisLeslie



Joined: 04 Jun 2006
Posts: 50
Location: Australia
ChrisLeslie
OK, but why do we have to give them a specific name? I can call them anything and it makes no difference to the outcome as far as I can tell.

Chris
Post 23 Feb 2007, 04:03
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Garthower



Joined: 21 Apr 2006
Posts: 158
Location: Ukraine
Garthower
Names for sections is easier good form of programming, no more. Any name of any section will not affect in any way working capacity of the program.
Post 23 Feb 2007, 07:22
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Raedwulf



Joined: 13 Jul 2005
Posts: 375
Location: United Kingdom
Raedwulf
We didn't design the PE format Smile.
Post 23 Feb 2007, 09:34
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f0dder



Joined: 19 Feb 2004
Posts: 3170
Location: Denmark
f0dder
Sorry for reviving an old thread... but legend has it Smile that some tools (or perhaps some windows versions?) required the resource section to be called .rsrc - I've seen compressors that renames all other sections but has options to keep .rsrc.

I've never stumbled upon the issue myself, so I don't know if it's just an urban legend or if there's some truth to it - but I've always stuck with .rsrc to be safe Smile
Post 05 Aug 2007, 23:15
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LocoDelAssembly
Your code has a bug


Joined: 06 May 2005
Posts: 4633
Location: Argentina
LocoDelAssembly
f0dder, even on Win95 OSR2 doing
Code:
align 4 ; Not optional at all
data resource
.
.
.
end data    
Worked for me.

So, perhaps it is just to be suitable for some PE tools?
Post 05 Aug 2007, 23:23
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SFeLi



Joined: 03 Nov 2004
Posts: 140
Location: Severodvinsk, Russia
SFeLi
LocoDelAssembly, “.rsrc” is required section name for version information.
Post 05 Aug 2007, 23:34
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LocoDelAssembly
Your code has a bug


Joined: 06 May 2005
Posts: 4633
Location: Argentina
LocoDelAssembly
SFeLi, you are right:
Code:
RESOURCE_SECTION equ 1

include 'win32ax.inc'

ret

match  =1, RESOURCE_SECTION{
section '.rsrc' resource readable}

match =0, RESOURCE_SECTION{
align 4
data resource}
  directory RT_VERSION, version

  resource version, 1, LANG_ENGLISH+SUBLANG_DEFAULT, vinfo

  versioninfo vinfo,VOS__WINDOWS32,VFT_APP,VFT2_UNKNOWN,\
                    LANG_ENGLISH+SUBLANG_DEFAULT,0,\
              'FileDescription','Description of program',\
              'LegalCopyright','Copyright et cetera',\
              'FileVersion','1.0',\
              'ProductVersion','1.0'
match =0, RESOURCE_SECTION{
end data}    


With "RESOURCE_SECTION equ 1" Windows can display the version info while with "RESOURCE_SECTION equ 0" can't.

The myth is true! Very Happy

Thanks SFeLi
Post 06 Aug 2007, 00:08
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asmfan



Joined: 11 Aug 2006
Posts: 392
Location: Russian
asmfan
and try to change .rsrc to other name - work fine xp sp2+ )
The main thing - resourses seem to be in one whole section.
Post 06 Aug 2007, 06:32
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SFeLi



Joined: 03 Nov 2004
Posts: 140
Location: Severodvinsk, Russia
SFeLi
Quote:
resourses seem to be in one whole section.

At the start of any section.

Ok, now the only thing that requires '.rsrc' is typelib handling code in OLEAUT32.DLL.
Post 06 Aug 2007, 13:43
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