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Patrick_



Joined: 11 Mar 2006
Posts: 53
Location: 127.0.0.1
Patrick_
Hello all. I'm beginning to learn assembly, and I'm reading a PDF (Programming from the Ground Up) that uses GNU Assembler. Now, I'd use as, but the syntax is horrible.

Anyway, up until now I've been able to convert from as to fasm syntax. But now, I need to declare a buffer in section .bss of a certain length. How would I do this? I searched through the fasm manual, and some other docs, but couldn't find what I was looking for. Any help would be appreciated.

By the way, here is the code that was in the book:

Code:
.section .bss (section '.bss' writeable)
.equ BUFFER_SIZE, 500 (BUFFER_SIZE equ 500)
.lcomm BUFFER_DATA, BUFFER_SIZE (?)
    


Also, would you happen to know why, if I have at the top of my source, "format ELF executable", that fasm gives me "extra characters at end" when I have "section '.bss' writeable) in my code, but if I leave out the "executable" part, it doesn't? Just curious.

Thanks! Smile [/code]
Post 12 Mar 2006, 17:01
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okasvi



Joined: 18 Aug 2005
Posts: 383
Location: Finland
okasvi
This compiles, and isnt there any examples on linux package of fasm?
Code:
format ELF executable
entry start
section readable executable
start:
; your code goes here.
section readable writeable
BUFFER_SIZE equ 500
BUFFER_DATA rd BUFFER_SIZE    

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Post 12 Mar 2006, 22:30
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Patrick_



Joined: 11 Mar 2006
Posts: 53
Location: 127.0.0.1
Patrick_
Thank you, I figured it out. Yes, I guess I passed over it...
Post 12 Mar 2006, 23:05
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