.code
public	_start,main
_start:			; Entry point
main:			; gdb breakpoint
	MOV	RAX,1	; SYS_write (see /usr/include/{arch.}/asm/unistd.h)
	MOV	RDI,1	; File descriptor 1: stdout (standard output)
	MOV	RSI,OFFSET MSG; String address
	MOV	RDX,LEN	; String length
	SYSCALL		; Call the corresponding OS kernel function
	MOV	RAX,60	; SYS_exit (process termination)
	SYSCALL
.data
MSG	db 'Hello, world!',10,10
	LEN equ $ - MSG
end