section .data
    msg db "Hello world!", 0ah
    

section .text
    global _start

_start:
    mov rax, 1
    mov rdi, 1
    mov rsi, msg
    mov rdx, 13
    add rdx,47
    sub rdx,5
    add rdi,12
    syscall
    mov rax, 60
    mov rdi, 0
    syscall