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ntos



Joined: 06 Jul 2023
Posts: 18
ntos 01 Aug 2023, 02:26
Hi,
A = 60
B equ 60

Any difference if A and B are defined like this?
Thank you.
Post 01 Aug 2023, 02:26
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revolution
When all else fails, read the source


Joined: 24 Aug 2004
Posts: 20173
Location: In your JS exploiting you and your system
revolution 01 Aug 2023, 02:28
They are very different.

equ is a textual replacement. Processed by the preprocessor.

= is a numeric variable. Processed by the assembler stage.
Code:
a equ 2*
b = a 3
display b + '0'    
Post 01 Aug 2023, 02:28
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ntos



Joined: 06 Jul 2023
Posts: 18
ntos 01 Aug 2023, 02:50
I mean If we are defining syscalls for a linux app for example, = or equ are no difference, arent they?
sys_write = 1
sys_exit equ 60
Post 01 Aug 2023, 02:50
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revolution
When all else fails, read the source


Joined: 24 Aug 2004
Posts: 20173
Location: In your JS exploiting you and your system
revolution 01 Aug 2023, 02:53
You can't forward reference equ
Code:
mov eax,sys_exit  ; <-- error: undefined symbol 'sys_exit'.
sys_exit equ 60    
Post 01 Aug 2023, 02:53
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ntos



Joined: 06 Jul 2023
Posts: 18
ntos 01 Aug 2023, 04:05
Thank you. It is clear now.
Post 01 Aug 2023, 04:05
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