Guide To Assembly: Language- A Concise Introduction

_start: ; write syscall (rax=1, rdi=1 stdout, rsi=msg, rdx=len) mov rax, 1 mov rdi, 1 mov rsi, msg mov rdx, 16 syscall

; exit syscall (rax=60, rdi=0) mov rax, 60 xor rdi, rdi syscall