50 struct pcb {  struct
51 	int	pcb_edi;	/* (*) */  argument
52 	int	pcb_esi;	/* (*) */  argument
53 	int	pcb_ebp;	/* (*) */  argument
54 	int	pcb_esp;	/* (*) */  argument
55 	int	pcb_ebx;	/* (*) */  argument
56 	int	pcb_eip;	/* (*) */  argument
57 	struct segment_descriptor pcb_fsd;  argument
58 	struct segment_descriptor pcb_gsd;  argument
59 	int	pcb_ds;  argument
60 	int	pcb_es;  argument
61 	int	pcb_fs;  argument
62 	int	pcb_gs;  argument
63 	int	pcb_ss;  argument
64 	int	pcb_cr0;  argument
65 	int	pcb_cr2;  argument
66 	int	pcb_cr3;  argument
67 	int	pcb_cr4;  argument
68 	int     pcb_dr0;  argument
69 	int     pcb_dr1;  argument
70 	int     pcb_dr2;  argument
71 	int     pcb_dr3;  argument
72 	int     pcb_dr6;  argument
73 	int     pcb_dr7;  argument
75 	struct region_descriptor pcb_gdt;  argument
76 	struct region_descriptor pcb_idt;  argument
77 	uint16_t	pcb_ldt;  argument
78 	uint16_t	pcb_tr;  argument
80 	u_int	pcb_flags;  argument
89 	uint16_t pcb_initial_npxcw;  argument
91 	caddr_t	pcb_onfault;	/* copyin/out fault recovery */  argument
92 	struct	pcb_ext	*pcb_ext;	/* optional pcb extension */  argument
93 	int	pcb_waspsl;	/* unused padding for ABI and API compat */  argument
94 	u_long	pcb_vm86[2];	/* vm86bios scratch space */  argument
95 	union	savefpu *pcb_save;  argument
97 	uint32_t pcb_pad[10];  argument