stack_dir         100 main/alloca.c  static int stack_dir;		/* 1 or -1 once known.  */
stack_dir         101 main/alloca.c  #define	STACK_DIR	stack_dir
stack_dir         119 main/alloca.c  	stack_dir = 1;		/* Stack grew upward.  */
stack_dir         121 main/alloca.c  	stack_dir = -1;		/* Stack grew downward.  */