Re: [Nasm-users] Working with pointers

[Jakob B. <jb...@wi...>]

On 17-12-2010 07:27, Littlefield, Tyler wrote:
> hello all,
> I have a quick question.
> I have the following:
> section .data
> ptr dd 0
> array times 100 db 0
>
> Now, when I want to assign array to p, I can't mov it--how can I assign
> the pointer to point there? Last, is there a way to get the type of
> processor?
> (32-64), as that will make a difference on the code in some places?
>

; For 32 bits, I think this should assemble just fine:

     ptr dd 0
     array times 100 db 0

     mov [ptr], array

; For 64 bits, The code should become

     ptr dq 0
     array times 100 db 0

     lea rax,[array] ; Add some notation here to make this rip relative!
     mov [ptr], rax

I don't know how to test if nasm is compiling for 16, 32 or 64 bits with 
assembler directives,
sorry I don't do that much nasm coding these days.