section .data
msg     db      'Hello, world!',0xA
len     equ     $-msg
 
    section .text
global  _start
_start:
        mov     edx,len
        mov     ecx,msg
        mov     ebx,1
        mov     eax,4
        int     0x80
 
        mov     ebx,0
        mov     eax,1
        int     0x80