run.sh

#!/bin/sh

nasm -f elf64 test.s && ld -s -o test test.o && ./test

test.s

section .data

message:
  db    `test\n`, 0

section .text

global _start

_start:
  mov     rbx, 1
  jmp     _app

_app:
  mov     rax, 4
  mov     rdi, 1
  mov     rsi, message
  mov     rdx, 5
  syscall

  dec     rbx
  cmp     rbx, 0
  jne      _app
  jmp     _exit

_exit:
  mov     rax, 1
  xor     rdi, rdi
  syscall