Duplicando mensagens em Assembly

;Lincoln Cesar dos Reis Arantes
;Compilado no site: https://www.tutorialspoint.com/compile_assembly_online.php

section .text
    global _start       ;must be declared for using gcc
_start:                     ;tell linker entry point
    mov edx, len    ;message length
    mov ecx, msg    ;message to write
    mov ebx, 1      ;file descriptor (stdout)
    mov eax, 4      ;system call number (sys_write)
    int 0x80        ;call kernel


    mov edx, len2    ;message length
    mov ecx, msg2    ;message to write
    mov ebx, 1      ;file descriptor (stdout)
    mov eax, 4      ;system call number (sys_write)
    int 0x80        ;call kernel

    ;exit
    mov eax, 1      ;system call number (sys_exit)
    int 0x80        ;call kernel


section .data

msg db  'Hello, world!',0xa ;our dear string
len equ $ - msg         ;length of our dear string

msg2    db  'Hello, dia!',0xa   ;our dear string
len2    equ $ - msg2            ;length of our dear string