1/*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 2003 Peter Wemm
5 * Copyright (c) 1999 Marcel Moolenaar
6 * All rights reserved.
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 *    in this position and unchanged.
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 * 3. The name of the author may not be used to endorse or promote products
18 *    derived from this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#ifndef _X86_UCONTEXT_H_
33#define	_X86_UCONTEXT_H_
34
35#ifdef __i386__
36/* Keep _MC_* values similar to amd64 */
37#define	_MC_HASSEGS	0x1
38#define	_MC_HASBASES	0x2
39#define	_MC_HASFPXSTATE	0x4
40#define	_MC_FLAG_MASK	(_MC_HASSEGS | _MC_HASBASES | _MC_HASFPXSTATE)
41
42typedef struct __mcontext {
43	/*
44	 * The definition of mcontext_t must match the layout of
45	 * struct sigcontext after the sc_mask member.  This is so
46	 * that we can support sigcontext and ucontext_t at the same
47	 * time.
48	 */
49	__register_t	mc_onstack;	/* XXX - sigcontext compat. */
50	__register_t	mc_gs;		/* machine state (struct trapframe) */
51	__register_t	mc_fs;
52	__register_t	mc_es;
53	__register_t	mc_ds;
54	__register_t	mc_edi;
55	__register_t	mc_esi;
56	__register_t	mc_ebp;
57	__register_t	mc_isp;
58	__register_t	mc_ebx;
59	__register_t	mc_edx;
60	__register_t	mc_ecx;
61	__register_t	mc_eax;
62	__register_t	mc_trapno;
63	__register_t	mc_err;
64	__register_t	mc_eip;
65	__register_t	mc_cs;
66	__register_t	mc_eflags;
67	__register_t	mc_esp;
68	__register_t	mc_ss;
69
70	int	mc_len;			/* sizeof(mcontext_t) */
71#define	_MC_FPFMT_NODEV		0x10000	/* device not present or configured */
72#define	_MC_FPFMT_387		0x10001
73#define	_MC_FPFMT_XMM		0x10002
74	int	mc_fpformat;
75#define	_MC_FPOWNED_NONE	0x20000	/* FP state not used */
76#define	_MC_FPOWNED_FPU		0x20001	/* FP state came from FPU */
77#define	_MC_FPOWNED_PCB		0x20002	/* FP state came from PCB */
78	int	mc_ownedfp;
79	__register_t mc_flags;
80	/*
81	 * See <machine/npx.h> for the internals of mc_fpstate[].
82	 */
83	int	mc_fpstate[128] __aligned(16);
84
85	__register_t mc_fsbase;
86	__register_t mc_gsbase;
87
88	__register_t mc_xfpustate;
89	__register_t mc_xfpustate_len;
90
91	int	mc_spare2[4];
92} mcontext_t;
93#endif /* __i386__ */
94
95#ifdef __amd64__
96/*
97 * mc_flags bits. Shall be in sync with TF_XXX.
98 */
99#define	_MC_HASSEGS	0x1
100#define	_MC_HASBASES	0x2
101#define	_MC_HASFPXSTATE	0x4
102#define	_MC_FLAG_MASK	(_MC_HASSEGS | _MC_HASBASES | _MC_HASFPXSTATE)
103
104typedef struct __mcontext {
105	/*
106	 * The definition of mcontext_t must match the layout of
107	 * struct sigcontext after the sc_mask member.  This is so
108	 * that we can support sigcontext and ucontext_t at the same
109	 * time.
110	 */
111	__register_t	mc_onstack;	/* XXX - sigcontext compat. */
112	__register_t	mc_rdi;		/* machine state (struct trapframe) */
113	__register_t	mc_rsi;
114	__register_t	mc_rdx;
115	__register_t	mc_rcx;
116	__register_t	mc_r8;
117	__register_t	mc_r9;
118	__register_t	mc_rax;
119	__register_t	mc_rbx;
120	__register_t	mc_rbp;
121	__register_t	mc_r10;
122	__register_t	mc_r11;
123	__register_t	mc_r12;
124	__register_t	mc_r13;
125	__register_t	mc_r14;
126	__register_t	mc_r15;
127	__uint32_t	mc_trapno;
128	__uint16_t	mc_fs;
129	__uint16_t	mc_gs;
130	__register_t	mc_addr;
131	__uint32_t	mc_flags;
132	__uint16_t	mc_es;
133	__uint16_t	mc_ds;
134	__register_t	mc_err;
135	__register_t	mc_rip;
136	__register_t	mc_cs;
137	__register_t	mc_rflags;
138	__register_t	mc_rsp;
139	__register_t	mc_ss;
140
141	long	mc_len;			/* sizeof(mcontext_t) */
142
143#define	_MC_FPFMT_NODEV		0x10000	/* device not present or configured */
144#define	_MC_FPFMT_XMM		0x10002
145	long	mc_fpformat;
146#define	_MC_FPOWNED_NONE	0x20000	/* FP state not used */
147#define	_MC_FPOWNED_FPU		0x20001	/* FP state came from FPU */
148#define	_MC_FPOWNED_PCB		0x20002	/* FP state came from PCB */
149	long	mc_ownedfp;
150	/*
151	 * See <machine/fpu.h> for the internals of mc_fpstate[].
152	 */
153	long	mc_fpstate[64] __aligned(16);
154
155	__register_t	mc_fsbase;
156	__register_t	mc_gsbase;
157
158	__register_t	mc_xfpustate;
159	__register_t	mc_xfpustate_len;
160
161	long	mc_spare[4];
162} mcontext_t;
163#endif /* __amd64__ */
164
165#endif /* !_X86_UCONTEXT_H_ */
166