Hello World in Assembly (NASM)

hello.asm

; ----------------------------------------------------------------------------------------
; "Hello, World" in Assembly.
; *Runs on 64-bit Linux only.
;
; $ nasm -felf64 hello.asm -o hello.o && ld hello.o -o hello && rm hello.o && ./hello
; ----------------------------------------------------------------------------------------

          global    _start

          section   .text
_start:   mov       rax, 1              ; system call for write
          mov       rdi, 1              ; file handle 1 is stdout
          mov       rsi, message        ; address of string to output
          mov       rdx, 13             ; number of bytes
          syscall                       ; invoke operating system to do the write
          mov       rax, 60             ; system call for exit
          xor       rdi, rdi            ; exit code 0
          syscall                       ; invoke operating system to exit

          section   .data
message:  db        "Hello, World", 10  ; note the newline at the end