/* main program calling the kernel
   hello world from linuxassembly.org
   in AT&T syntax
 --- must compile with an option (similar to -notrap in spim)
   gcc -g -nostartfiles hello.s
   ddd does not find the source file, however. you might as well debug with gdb
 */

	.data
msg:	.ascii "Hello world\n"
len	= . - msg		# length of string.
				# '.' is the location symbol
				# instead of '$' in nasm
				
	.text
	.global _start
_start:				# loader starts execution here
	mov	$msg,%ecx	# Address of message
	mov	$len, %edx	# length of message -- yes, you need $ for all consts.
	mov	$1, %ebx	# STDOUT
	mov	$4, %eax	# sys_write service
	int	$0x80		# kernel call (interrupt) -- even here a $.
	mov	$1, %eax	# sys_exit service
	int	$0x80		# kernel call - program terminated