fasm & align

flat assembler
Message board for the users of flat assembler.

Index > Linux > fasm & align

Author

Thread

walker

Joined: 27 Apr 2007
Posts: 1

walker 27 Apr 2007, 22:21

Prompt please why it is not compiled.
fasm refuses align 8 if I use an option "format ELF"

Here an example:

format ELF
use32
align 8
xor eax,eax

27 Apr 2007, 22:21

realcr

Joined: 02 Apr 2007
Posts: 39

realcr 22 May 2007, 21:02

Hey walker.

Maybe I don't understand your question , but why in fact do you want to align to bytes? I don't think there is anything in your program not aligned by bytes already.
the smallest piece of data the processor can handle is byte.

maybe you mean align by 8 bytes?

realcr.

22 May 2007, 21:02

Tomasz Grysztar

Joined: 16 Jun 2003
Posts: 8354
Location: Kraków, Poland

Tomasz Grysztar 22 May 2007, 22:11

The default ELF section is aligned to 4 bytes only, and you cannot align data inside the section more than the section is aligned itself.

Thus, to make it work, you need first to align the section properly (and this is also what the error message says). For example:

Code:

format ELF

section '.code' executable align 8

align 8
xor eax,eax

22 May 2007, 22:11

vid
Verbosity in development

Joined: 05 Sep 2003
Posts: 7105
Location: Slovakia

vid 22 May 2007, 22:30

should go to FAQ

22 May 2007, 22:30

< Last Thread | Next Thread >

Forum Rules:

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum