exit.s

#PURPOSE:	Simple program that exits and returns a
#			status code back to the Linux kernel
#

#INPUT:		none
#

#OUTPUT:	return a status code. This can be viewed
#			by typing
#
#			echo $?
#
#			after running the program
#

#VARIABLES:	
#			%eax holds the system call number
#			%ebx holds the return status
#
.section .data

.section .text
.globl _start
_start:
	movl $1, %eax	# this is the linux kernel command
					# number (system call) for exiting
					# a program

	movl $0, %ebx	# this is the status number we will
					# return to the operating system.
					# Change this around and it will
					# retrun different things to
					# echo $?

	int $0x80		# this wakes up the kernel to run
					# the exit command