//
// user-level startup routine
//
	.text
	.globl _start
	.globl	main
	.globl	exit

// entry point - this is where the kernel starts us running
_start:
	// we immediately call main()
	call main

	// if we come back from that, it means the user
	// program didn't call exit(), in which case the
	// value returned from main() is the exit status

	// push that value onto the stack and call exit()
	subl	$12, %esp
	pushl	%eax
	call	exit

	// if we come back from that, something bad has
	// happened, so we just lock up
1:	jmp 1b