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newb and nasm

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Join Date: Oct 2006

Posts: 1

Reputation: ahcfan is an unknown quantity at this point

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ahcfan

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Newbie Poster

newb and nasm

Oct 25th, 2006

Hi, i'm currently learning assembly with the nasm assembler and i'm stuck trying to get a memory address into a register. Here is what I have:

 Help with Code Tags 
 Assembly Syntax (Toggle Plain Text) 
[bits 32]
[org 100h]
 
section .data
msg db "Hello", 0
 
section .text
mov si, [msg]
;lea si, [msg]
 
ret
[bits 32]
[org 100h]

section .data
msg db "Hello", 0

section .text
mov si, [msg]
;lea si, [msg]

ret

I read the nasm manual and it appear that both instructions should work but they don't. With lea si stays at 0, with mov si gets the wrong address What exactly am I doing wrong here??

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Join Date: Dec 2006

Posts: 1

Reputation: dynarski is an unknown quantity at this point

Solved Threads: 1

dynarski

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Newbie Poster

Re: newb and nasm

Dec 6th, 2006

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Originally Posted by ahcfan

Hi, i'm currently learning assembly with the nasm assembler and i'm stuck trying to get a memory address into a register. Here is what I have:
Help with Code Tags

Assembly Syntax (Toggle Plain Text)
[bits 32]
[org 100h]
 
section .data
msg db "Hello", 0
 
section .text
mov si, [msg]
;lea si, [msg]
 
ret
[bits 32] [org 100h] section .data msg db "Hello", 0 section .text mov si, [msg] ;lea si, [msg] ret
I read the nasm manual and it appear that both instructions should work but they don't. With lea si stays at 0, with mov si gets the wrong address What exactly am I doing wrong here??