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 (c) 1992, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Copyright 2020 Joyent, Inc.
25 */
26
27 #ifndef _SYS_PCB_H
28 #define _SYS_PCB_H
29
30 #include <sys/regset.h>
31 #include <sys/segments.h>
32 #ifndef _ASM
33 #include <sys/fp.h> /* kfpu_t */
34 #endif
35
36 #ifdef __cplusplus
37 extern "C" {
38 #endif
39
40 #ifndef _ASM
41 typedef struct fpu_ctx {
42 kfpu_t fpu_regs; /* kernel save area for FPU */
43 uint64_t fpu_xsave_mask; /* xsave mask for FPU/SSE/AVX */
44 uint_t fpu_flags; /* FPU state flags */
45 void *fpu_signal; /* copyin area for signal handling */
46 } fpu_ctx_t;
47
48 typedef struct pcb {
49 fpu_ctx_t pcb_fpu; /* fpu state */
50 uint_t pcb_flags; /* state flags; cleared on fork */
51 greg_t pcb_drstat; /* status debug register (%dr6) */
52 unsigned char pcb_instr; /* /proc: instruction at stop */
53 unsigned char pcb_rupdate; /* new register values in pcb -> regs */
54 uintptr_t pcb_fsbase;
55 uintptr_t pcb_gsbase;
56 selector_t pcb_ds;
57 selector_t pcb_es;
58 selector_t pcb_fs;
59 selector_t pcb_gs;
60 user_desc_t pcb_fsdesc; /* private per-lwp %fs descriptors */
61 user_desc_t pcb_gsdesc; /* private per-lwp %gs descriptors */
62 } pcb_t;
63
64 #endif /* ! _ASM */
65
66 /* pcb_flags */
67 #define DEBUG_PENDING 0x02 /* single-step of lcall for a sys call */
68 #define PRSTOP_CALLED 0x04 /* prstop() has been called for this lwp */
69 #define INSTR_VALID 0x08 /* value in pcb_instr is valid (/proc) */
70 #define NORMAL_STEP 0x10 /* normal debugger-requested single-step */
71 #define WATCH_STEP 0x20 /* single-stepping in watchpoint emulation */
72 #define CPC_OVERFLOW 0x40 /* performance counters overflowed */
73 #define REQUEST_STEP 0x100 /* request pending to single-step this lwp */
74 #define REQUEST_NOSTEP 0x200 /* request pending to disable single-step */
75 #define ASYNC_HWERR 0x400 /* hardware error has corrupted context */
76
77 /* pcb_rupdate values */
78 #define PCB_UPDATE_SEGS 0x01 /* Update segment registers */
79 #define PCB_UPDATE_FPU 0x02 /* Update FPU registers */
80
81 #define PCB_SET_UPDATE_SEGS(pcb) ((pcb)->pcb_rupdate |= PCB_UPDATE_SEGS)
82 #define PCB_SET_UPDATE_FPU(pcb) ((pcb)->pcb_rupdate |= PCB_UPDATE_FPU)
83 #define PCB_NEED_UPDATE_SEGS(pcb) \
84 (((pcb)->pcb_rupdate & PCB_UPDATE_SEGS) != 0)
85 #define PCB_NEED_UPDATE_FPU(pcb) \
86 (((pcb)->pcb_rupdate & PCB_UPDATE_FPU) != 0)
87 #define PCB_NEED_UPDATE(pcb) \
88 (PCB_NEED_UPDATE_FPU(pcb) || PCB_NEED_UPDATE_SEGS(pcb))
89 #define PCB_CLEAR_UPDATE_SEGS(pcb) ((pcb)->pcb_rupdate &= ~PCB_UPDATE_SEGS)
90 #define PCB_CLEAR_UPDATE_FPU(pcb) ((pcb)->pcb_rupdate &= ~PCB_UPDATE_FPU)
91
92 /* fpu_flags */
93 #define FPU_EN 0x01 /* FPU in use (user or kernel) */
94 #define FPU_VALID 0x02 /* fpu_regs has valid fpu state */
95 #define FPU_MODIFIED 0x04 /* fpu_regs is modified (/proc) */
96 #define FPU_KERNEL 0x08 /* Kernel is using the FPU */
97
98 #define FPU_INVALID 0x0 /* fpu context is not in use */
99
100 /* fpu_flags */
101
102 #ifdef __cplusplus
103 }
104 #endif
105
106 #endif /* _SYS_PCB_H */