FreeBSD/Linux Kernel Cross Reference
sys/i386/include/pcb.h
1 /*-
2 * Copyright (c) 1990 The Regents of the University of California.
3 * All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * William Jolitz.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 4. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 * from: @(#)pcb.h 5.10 (Berkeley) 5/12/91
33 * $FreeBSD: releng/5.4/sys/i386/include/pcb.h 145252 2005-04-18 21:36:17Z peter $
34 */
35
36 #ifndef _I386_PCB_H_
37 #define _I386_PCB_H_
38
39 /*
40 * Intel 386 process control block
41 */
42 #include <machine/npx.h>
43
44 struct pcb {
45 int pcb_cr3;
46 int pcb_edi;
47 int pcb_esi;
48 int pcb_ebp;
49 int pcb_esp;
50 int pcb_ebx;
51 int pcb_eip;
52
53 int pcb_dr0;
54 int pcb_dr1;
55 int pcb_dr2;
56 int pcb_dr3;
57 int pcb_dr6;
58 int pcb_dr7;
59
60 union savefpu pcb_save;
61 u_int pcb_flags;
62 #define FP_SOFTFP 0x01 /* process using software fltng pnt emulator */
63 #define PCB_DBREGS 0x02 /* process using debug registers */
64 #define PCB_NPXTRAP 0x04 /* npx trap pending */
65 #define PCB_NPXINITDONE 0x08 /* fpu state is initialized */
66 #define PCB_VM86CALL 0x10 /* in vm86 call */
67
68 caddr_t pcb_onfault; /* copyin/out fault recovery */
69 int pcb_gs;
70 struct pcb_ext *pcb_ext; /* optional pcb extension */
71 int pcb_psl; /* process status long */
72 void (*pcb_switchout)(void); /* Special switchout function. */
73 u_long pcb_vm86[2]; /* vm86bios scratch space */
74 };
75
76 #ifdef _KERNEL
77 struct trapframe;
78
79 void makectx(struct trapframe *, struct pcb *);
80 void savectx(struct pcb *);
81 #endif
82
83 #endif /* _I386_PCB_H_ */
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