hello.asm

section .data
	text1 db "what is your name?",10
	len1 equ $ - text1
	text2 db "Hello ",10
	len2 equ $ - text2

section .bss
	name resb 16
	msg resb 32

section .text
	global _start

_start:
	call _copy
	call _print_hello

	mov rax, 60
	mov rdi, 0
	syscall

_copy:
	mov rsi, text2
	mov rdi, msg
	mov rcx, len2
	dec rcx
	rep movsb
	
	call _ask_name

	push rcx

	mov rsi, name
	lea rdi, [msg+len2]
	dec rcx
	rep movsb

	mov byte [rdi],10
	
	pop rcx

	ret

_ask_name:
	mov rax, 1
	mov rdi, 1
	mov rsi, text1
	mov rdx, len1
	syscall

	mov rax, 0
	mov rdi, 0
	mov rsi, name
	mov rdx, 16
	syscall
	mov rcx, rax
	ret

_print_hello:
	mov rax, 1
        mov rdi, 1
        mov rsi, msg
        mov rdx, len2
	add rdx, rcx
	inc rdx
        syscall
	ret