; nasm -f elf64 hello.asm && ld -o hello hello.o --entry=start

%define     SYSCALL_WRITE   1
%define     SYSCALL_EXIT    60

global start
start:
            mov rcx, 5
print_loop:
            push rcx
            call hello
            pop rcx
            loop print_loop

            mov rax, SYSCALL_EXIT
            mov rdi, 0
            syscall

hello:
            mov rdi, 1
            mov rsi, str
            mov rdx, strlen
            mov rax, SYSCALL_WRITE
            syscall
            ret

section .data
str:
            db `Hello, assembler!\n`
strlen      equ $ - str