88 struct pcb {  struct
89 	int	pcb_sp;		/* sp (%o6) when switch() was called */  argument
90 	int	pcb_pc;		/* pc (%o7) when switch() was called */  argument
91 	int	pcb_psr;	/* %psr when switch() was called */  argument
93 	void *	pcb_onfault;	/* for copyin/out */  argument
95 	int	pcb_uw;		/* user windows inside CPU */  argument
96 	int	pcb_wim;	/* log2(%wim) */  argument
97 	int	pcb_nsaved;	/* number of windows saved in pcb */  argument
100 	int	pcb_winof;	/* number of window overflow traps */  argument
101 	int	pcb_winuf;	/* number of window underflow traps */  argument
103 	int	pcb_pad;	/* pad to doubleword boundary */  argument
106 	struct	rwindow pcb_rw[PCB_MAXWIN];	/* saved windows */  argument