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byte ptr usage (nasm assembly)

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Join Date: Jan 2008

Posts: 49

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flash121

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byte ptr usage (nasm assembly)

Dec 3rd, 2008

Hello!

I want to go through a string char by char and i've heard a byte ptr is the way to do this, but i'm having problems with using it.

I tried with the code below, but i get an error saying: "comma or end of line expected" at the byte ptr line.

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BITS 32
extern printf
global main
 
section .data
string db "string",10,0
 
section .text
 
main:
push dword string
call fun
add esp,4
 
ret
 
 
fun:
 
mov ebx,dword[esp+4]
mov al,byte ptr[ebx]
..
..
..
ret
BITS 32
extern printf
global main

section .data
string db "string",10,0

section .text

main:
push dword string
call fun
add esp,4

ret


fun:

mov ebx,dword[esp+4]
mov al,byte ptr[ebx]
..
..
..
ret