1/*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 2003 Peter Wemm.
5 * Copyright (c) 1990 The Regents of the University of California.
6 * All rights reserved.
7 *
8 * This code is derived from software contributed to Berkeley by
9 * William Jolitz.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36#ifndef _MACHINE_FRAME_H_
37#define _MACHINE_FRAME_H_ 1
38
39/*
40 * System stack frames.
41 */
42
43#ifdef __i386__
44/*
45 * Exception/Trap Stack Frame
46 */
47
48struct trapframe {
49 int tf_fs;
50 int tf_es;
51 int tf_ds;
52 int tf_edi;
53 int tf_esi;
54 int tf_ebp;
55 int tf_isp;
56 int tf_ebx;
57 int tf_edx;
58 int tf_ecx;
59 int tf_eax;
60 int tf_trapno;
61 /* below portion defined in 386 hardware */
62 int tf_err;
63 int tf_eip;
64 int tf_cs;
65 int tf_eflags;
66 /* below only when crossing rings (user to kernel) */
67 int tf_esp;
68 int tf_ss;
69};
70
71/* Superset of trap frame, for traps from virtual-8086 mode */
72
73struct trapframe_vm86 {
74 int tf_fs;
75 int tf_es;
76 int tf_ds;
77 int tf_edi;
78 int tf_esi;
79 int tf_ebp;
80 int tf_isp;
81 int tf_ebx;
82 int tf_edx;
83 int tf_ecx;
84 int tf_eax;
85 int tf_trapno;
86 /* below portion defined in 386 hardware */
87 int tf_err;
88 int tf_eip;
89 int tf_cs;
90 int tf_eflags;
91 /* below only when crossing rings (user (including vm86) to kernel) */
92 int tf_esp;
93 int tf_ss;
94 /* below only when crossing from vm86 mode to kernel */
95 int tf_vm86_es;
96 int tf_vm86_ds;
97 int tf_vm86_fs;
98 int tf_vm86_gs;
99};
100
101/*
102 * This alias for the MI TRAPF_USERMODE() should be used when we don't
103 * care about user mode itself, but need to know if a frame has stack
104 * registers. The difference is only logical, but on i386 the logic
105 * for using TRAPF_USERMODE() is complicated by sometimes treating vm86
106 * bioscall mode (which is a special ring 3 user mode) as kernel mode.
107 */
108#define TF_HAS_STACKREGS(tf) TRAPF_USERMODE(tf)
109#endif /* __i386__ */
110
111#ifdef __amd64__
112/*
113 * Exception/Trap Stack Frame
114 *
115 * The ordering of this is specifically so that we can take first 6
116 * the syscall arguments directly from the beginning of the frame.
117 */
118
119struct trapframe {
120 register_t tf_rdi;
121 register_t tf_rsi;
122 register_t tf_rdx;
123 register_t tf_rcx;
124 register_t tf_r8;
125 register_t tf_r9;
126 register_t tf_rax;
127 register_t tf_rbx;
128 register_t tf_rbp;
129 register_t tf_r10;
130 register_t tf_r11;
131 register_t tf_r12;
132 register_t tf_r13;
133 register_t tf_r14;
134 register_t tf_r15;
135 uint32_t tf_trapno;
136 uint16_t tf_fs;
137 uint16_t tf_gs;
138 register_t tf_addr;
139 uint32_t tf_flags;
140 uint16_t tf_es;
141 uint16_t tf_ds;
142 /* below portion defined in hardware */
143 register_t tf_err;
144 register_t tf_rip;
145 register_t tf_cs;
146 register_t tf_rflags;
147 /* the amd64 frame always has the stack registers */
148 register_t tf_rsp;
149 register_t tf_ss;
150};
151
152#define TF_HASSEGS 0x1
153#define TF_HASBASES 0x2
154#define TF_HASFPXSTATE 0x4
155#define TF_RESERV0 0x8 /* no tlsbase in the trapframe */
156#endif /* __amd64__ */
157
158#endif /* _MACHINE_FRAME_H_ */