_start:
	xor eax, eax
	xor ebx, ebx
	xor ecx, ecx
	xor edx, edx

	jmp two

# open file 'filename', then call read
one:
	pop ebx
	movb al, 0x5 # sys_open
	int 0x80 #sys_open('filename', 0), 0 for RD_ONLY, 1 for WR_ONLY, 2 for RD_WR

	mov esi, eax

read:
	movb al, 0x3 # sys_read
	mov ebx, esi # move fd to ebx
	lea ecx, [esp]
	movb dl, 0x1 #read 1 byte
	int 0x80

	# If (read null byte (\x00) or error)
		# exit
	xor ebx, ebx
	cmp eax, ebx
	jle exit
	# else
		# write this byte (character)
write:
	movb al, 0x4 # sys_write
	movb bl, 0x1 # write 1 byte
	movb dl, 0x1
	int 0x80 #now, ecx is still [esp], no need to assign 1 more time => save memory

	jmp read # This instruction causes loop until we read null byte

exit:
	movb al, 0x1 # sys_exit
	xor ebx, ebx # sys_exit(0)
	int 0x80