pcb.h revision 10230:ea2823eb6ac6 
1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22/*
23 * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
24 * Use is subject to license terms.
25 */
26
27#ifndef _SYS_PCB_H
28#define	_SYS_PCB_H
29
30#include <sys/regset.h>
31#include <sys/segments.h>
32
33#ifdef	__cplusplus
34extern "C" {
35#endif
36
37#ifndef _ASM
38typedef struct fpu_ctx {
39	kfpu_t		fpu_regs;	/* kernel save area for FPU */
40	uint_t		fpu_flags;	/* FPU state flags */
41} fpu_ctx_t;
42
43typedef struct pcb {
44	fpu_ctx_t	pcb_fpu;	/* fpu state */
45	uint_t		pcb_flags;	/* state flags; cleared on fork */
46	greg_t		pcb_drstat;	/* status debug register (%dr6) */
47	unsigned char	pcb_instr;	/* /proc: instruction at stop */
48#if defined(__amd64)
49	unsigned char	pcb_rupdate;	/* new register values in pcb -> regs */
50	uintptr_t	pcb_fsbase;
51	uintptr_t	pcb_gsbase;
52	selector_t	pcb_ds;
53	selector_t	pcb_es;
54	selector_t	pcb_fs;
55	selector_t	pcb_gs;
56#endif /* __amd64 */
57	user_desc_t	pcb_fsdesc;	/* private per-lwp %fs descriptors */
58	user_desc_t	pcb_gsdesc;	/* private per-lwp %gs descriptors */
59} pcb_t;
60
61#endif /* ! _ASM */
62
63/* pcb_flags */
64#define	DEBUG_PENDING	0x02	/* single-step of lcall for a sys call */
65#define	PRSTOP_CALLED	0x04	/* prstop() has been called for this lwp */
66#define	INSTR_VALID	0x08	/* value in pcb_instr is valid (/proc) */
67#define	NORMAL_STEP	0x10	/* normal debugger-requested single-step */
68#define	WATCH_STEP	0x20	/* single-stepping in watchpoint emulation */
69#define	CPC_OVERFLOW	0x40	/* performance counters overflowed */
70#define	REQUEST_STEP	0x100	/* request pending to single-step this lwp */
71#define	REQUEST_NOSTEP	0x200	/* request pending to disable single-step */
72#define	ASYNC_HWERR	0x400	/* hardware error has corrupted context  */
73
74/* fpu_flags */
75#define	FPU_EN		0x1	/* flag signifying fpu in use */
76#define	FPU_VALID	0x2	/* fpu_regs has valid fpu state */
77#define	FPU_MODIFIED	0x4	/* fpu_regs is modified (/proc) */
78
79#define	FPU_INVALID	0x0	/* fpu context is not in use */
80
81/* fpu_flags */
82
83#ifdef	__cplusplus
84}
85#endif
86
87#endif	/* _SYS_PCB_H */
88