register alias

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swdv

Joined: 28 Mar 2018
Posts: 5

swdv 28 Mar 2018, 21:32

Is it possible to define a temporary alias for a register? Say I use it for a counter, would it be possible to refer to it as `counter`? Basically I'm looking for `virtual` but for a register. A temporary macro would also be great, but I don't think it is possible to delete a macro, is it?

Thanks in advance!

28 Mar 2018, 21:32

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20308
Location: In your JS exploiting you and your system

revolution 28 Mar 2018, 21:38

Use equ

Code:

counter equ eax
inc counter
mov ebx,counter
add ecx,counter
add counter,0x12345

28 Mar 2018, 21:38

DimonSoft

Joined: 03 Mar 2010
Posts: 1228
Location: Belarus

DimonSoft 29 Mar 2018, 09:54

revolution already gave you a solution. I’ll just say that the answer to the question…

swdv wrote:

A temporary macro would also be great, but I don't think it is possible to delete a macro, is it?

… is yes. It is possible. Both for macros and for equs. purge does the magic for macros, restore works for symbolic constants defined with equ.

29 Mar 2018, 09:54

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20308
Location: In your JS exploiting you and your system

revolution 29 Mar 2018, 10:28

Thanks for the follow-up. Also restruc for structures defined with struc.

29 Mar 2018, 10:28

swdv

Joined: 28 Mar 2018
Posts: 5

swdv 29 Mar 2018, 19:25

Wow thanks all! These are really helpful! I'm relatively new to assembly & FASM but I quite like it so far Smile

29 Mar 2018, 19:25

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