Print a pyramid of stars

stars.asm

global _start

SECTION .text
_start:
  mov r8, 1
loop:
  mov rax, 1
  mov rdi, 1
  mov rsi, star
  mov rdx, r8
  syscall

  mov rax, 1
  mov rdi, 1
  mov rsi, newline
  mov rdx, 1
  syscall

  add r8, 1

  cmp r8, 10
  jg return

  jmp loop

return:
  mov rax, 60
  mov rdi, 0
  syscall

section .data
star:    db  "**********"
newline: db 10

alex@fatima-Inspiron-5570:~/Code$ nasm -felf64 scratch.asm && ld -o scratch scratch.o && ./scratch
*
**
***
****
*****
******
*******
********
*********
**********