create .flat section

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Ali.Z

Joined: 08 Jan 2018
Posts: 732

Ali.Z 22 May 2024, 13:11

any body remembers how to create .fas section? do not be confused with .fas debugging symbols file.

iirc, there was a way to force fasm to stuff all data and imports along with code into one flat section named .fas or .flat i dont remember.

p.s. please change title to reflect correct section name {.fas|.flat}
pps. i really need this to test some nt loader specific bugs.

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Last edited by Ali.Z on 22 May 2024, 15:23; edited 1 time in total

22 May 2024, 13:11

bitRAKE

Joined: 21 Jul 2003
Posts: 4073
Location: vpcmpistri

bitRAKE 22 May 2024, 15:16

IIRC, '.flat' is the default section. The trick is to not use a "section" statement. Wink

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22 May 2024, 15:16

MatQuasar

Joined: 25 Oct 2023
Posts: 105

MatQuasar 22 May 2024, 15:16

It is .flat section.

I asked similar question before:
https://board.flatassembler.net/topic.php?t=21848

22 May 2024, 15:16

Ali.Z

Joined: 08 Jan 2018
Posts: 732

Ali.Z 22 May 2024, 15:24

thanks, i was about to manually calc import section size and rva and then patch the exe's optional header. too much work obv.

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22 May 2024, 15:24

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20445
Location: In your JS exploiting you and your system

revolution 23 May 2024, 02:14

Ali.Z wrote:

iirc, there was a way to force fasm to stuff all data and imports along with code into one flat section named .fas or .flat i dont remember.

There is no need to force anything. Place your section with any name you choose (you can also choose to name it ".flat") and put all your code, imports, exports, data, etc. in there.

Code:

format pe

section '.flat' readable writeable executable

entry $
        call $

data import
        dd 0x01234567
end data

data export
        dd 0x76543210
end data

my_data dd 0xdeadbeef
my_string db 'Hello, world!',13,10,0

23 May 2024, 02:14

Hrstka

Joined: 05 May 2008
Posts: 61
Location: Czech republic

Hrstka 23 May 2024, 09:04

Btw. it's not necessary to call the section '.flat'. You can choose any name, as long as it fits into 8 characters.

23 May 2024, 09:04

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