int f (args  ) {


 ?????  full code? --- all the data structures and algorithms of the os? 


  or is it something much simpler and smaller?

  	push args on stack
	push syscallid on stack
	push return address on stack 


	generate a software intr 

	pick up results from stack

	return them through  args

	return a val representing the success status of the sys call or
	any other useful info defined as per the syscall wrapper "f"

  
 }