# File: example/as/amd64/hello64.s

	.section .data
msg:	.ascii	"Hello, world!\n"
len:	.long	. - msg

	.section .text
	.global _start
_start:	# Program starting point.  Linker looks for _start symbol.

	pushq $14; pop %rdx	# %rdx=14
	pushq $msg; pop %rsi	# %rsi=msg
	pushq $1;  pop %rdi	# %rdi=1 (STDOUT)
	pushq $1;  pop %rax	# write(rdi,rsi,rdx) 
	syscall

	pushq	$2;	pop	%rdi	# retval=1
	pushq	$0x3c;	pop	%rax	# exit()
	syscall

# File: examples/as/amd64/hello.s
	# Použitá volání
	.equ	SYS_exit, 1
	.equ	SYS_write, 4

	# Standardní proudy
	.equ	STDIN,	0
	.equ	STDOUT,	1
	.equ	STDERR,	2

	.section .data
msg:	.ascii	"Hello, world!\n"
len:	.long	. - msg

	.section .text
	.global _start
_start:	# Program starting point.  Linker looks for _start symbol.

	movl	$SYS_write, %eax # sys_write(ebx=fd, ecx=ptr, edx=len)
	movl	$STDOUT, %ebx	# stdout
	leal	msg, %ecx	# Message start point
	movl	len, %edx	# Message lenght
	int	$0x80		# call kernel

	movl	$SYS_exit, %eax	# sys_exit()
	movl	$1, %ebx	# return value (only 8 bits)
	int	$0x80		# call kernel