46 typedef struct pcb {  struct
47 	fpu_ctx_t	pcb_fpu;	/* fpu state */  argument
48 	uint_t		pcb_flags;	/* state flags; cleared on fork */  argument
49 	greg_t		pcb_drstat;	/* status debug register (%dr6) */  argument
50 	unsigned char	pcb_instr;	/* /proc: instruction at stop */  argument
52 	unsigned char	pcb_rupdate;	/* new register values in pcb -> regs */  argument
53 	uintptr_t	pcb_fsbase;  argument
54 	uintptr_t	pcb_gsbase;  argument
55 	selector_t	pcb_ds;  argument
56 	selector_t	pcb_es;  argument
57 	selector_t	pcb_fs;  argument
58 	selector_t	pcb_gs;  argument
60 	user_desc_t	pcb_fsdesc;	/* private per-lwp %fs descriptors */  argument
61 	user_desc_t	pcb_gsdesc;	/* private per-lwp %gs descriptors */  argument