pcb.h revision 208833 
1/*-
2 * Copyright (c) 2003 Peter Wemm.
3 * Copyright (c) 1990 The Regents of the University of California.
4 * All rights reserved.
5 *
6 * This code is derived from software contributed to Berkeley by
7 * William Jolitz.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 *	from: @(#)pcb.h	5.10 (Berkeley) 5/12/91
34 * $FreeBSD: head/sys/amd64/include/pcb.h 208833 2010-06-05 15:59:59Z kib $
35 */
36
37#ifndef _AMD64_PCB_H_
38#define _AMD64_PCB_H_
39
40/*
41 * AMD64 process control block
42 */
43#include <machine/fpu.h>
44#include <machine/segments.h>
45
46struct pcb {
47	register_t	pcb_cr3;
48	register_t	pcb_r15;
49	register_t	pcb_r14;
50	register_t	pcb_r13;
51	register_t	pcb_r12;
52	register_t	pcb_rbp;
53	register_t	pcb_rsp;
54	register_t	pcb_rbx;
55	register_t	pcb_rip;
56	register_t	pcb_fsbase;
57	register_t	pcb_gsbase;
58	u_long		pcb_flags;
59#define	PCB_DBREGS	0x02	/* process using debug registers */
60#define	PCB_KERNFPU	0x04	/* kernel uses fpu */
61#define	PCB_FPUINITDONE	0x08	/* fpu state is initialized */
62#define	PCB_USERFPUINITDONE 0x10 /* fpu user state is initialized */
63#define	PCB_GS32BIT	0x20	/* linux gs switch */
64#define	PCB_32BIT	0x40	/* process has 32 bit context (segs etc) */
65#define	PCB_FULLCTX	0x80	/* full context restore on sysret */
66
67	u_int64_t	pcb_dr0;
68	u_int64_t	pcb_dr1;
69	u_int64_t	pcb_dr2;
70	u_int64_t	pcb_dr3;
71	u_int64_t	pcb_dr6;
72	u_int64_t	pcb_dr7;
73
74	struct	savefpu pcb_user_save;
75	uint16_t	pcb_initial_fpucw;
76
77	caddr_t		pcb_onfault; /* copyin/out fault recovery */
78
79	/* 32-bit segment descriptor */
80	struct user_segment_descriptor	pcb_gs32sd;
81	/* local tss, with i/o bitmap; NULL for common */
82	struct amd64tss *pcb_tssp;
83	struct	savefpu	*pcb_save;
84	char		pcb_full_iret;
85};
86
87struct xpcb {
88	struct pcb	xpcb_pcb;
89	register_t	xpcb_cr0;
90	register_t	xpcb_cr2;
91	register_t	xpcb_cr4;
92	register_t	xpcb_kgsbase;
93	struct region_descriptor xpcb_gdt;
94	struct region_descriptor xpcb_idt;
95	struct region_descriptor xpcb_ldt;
96	uint16_t	xpcb_tr;
97};
98
99#ifdef _KERNEL
100struct trapframe;
101
102void	makectx(struct trapframe *, struct pcb *);
103void	savectx(struct pcb *);
104int	savectx2(struct xpcb *);
105#endif
106
107#endif /* _AMD64_PCB_H_ */
108