1/*-
2 * Copyright (c) 1999 Marcel Moolenaar
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer
10 *    in this position and unchanged.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 * 3. The name of the author may not be used to endorse or promote products
15 *    derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * $FreeBSD$
29 */
30
31#ifndef _MACHINE_UCONTEXT_H_
32#define	_MACHINE_UCONTEXT_H_
33
34/* Keep _MC_* values similar to amd64 */
35#define	_MC_HASSEGS	0x1
36#define	_MC_HASBASES	0x2
37#define	_MC_HASFPXSTATE	0x4
38#define	_MC_FLAG_MASK	(_MC_HASSEGS | _MC_HASBASES | _MC_HASFPXSTATE)
39
40typedef struct __mcontext {
41	/*
42	 * The definition of mcontext_t must match the layout of
43	 * struct sigcontext after the sc_mask member.  This is so
44	 * that we can support sigcontext and ucontext_t at the same
45	 * time.
46	 */
47	__register_t	mc_onstack;	/* XXX - sigcontext compat. */
48	__register_t	mc_gs;		/* machine state (struct trapframe) */
49	__register_t	mc_fs;
50	__register_t	mc_es;
51	__register_t	mc_ds;
52	__register_t	mc_edi;
53	__register_t	mc_esi;
54	__register_t	mc_ebp;
55	__register_t	mc_isp;
56	__register_t	mc_ebx;
57	__register_t	mc_edx;
58	__register_t	mc_ecx;
59	__register_t	mc_eax;
60	__register_t	mc_trapno;
61	__register_t	mc_err;
62	__register_t	mc_eip;
63	__register_t	mc_cs;
64	__register_t	mc_eflags;
65	__register_t	mc_esp;
66	__register_t	mc_ss;
67
68	int	mc_len;			/* sizeof(mcontext_t) */
69#define	_MC_FPFMT_NODEV		0x10000	/* device not present or configured */
70#define	_MC_FPFMT_387		0x10001
71#define	_MC_FPFMT_XMM		0x10002
72	int	mc_fpformat;
73#define	_MC_FPOWNED_NONE	0x20000	/* FP state not used */
74#define	_MC_FPOWNED_FPU		0x20001	/* FP state came from FPU */
75#define	_MC_FPOWNED_PCB		0x20002	/* FP state came from PCB */
76	int	mc_ownedfp;
77	__register_t mc_flags;
78	/*
79	 * See <machine/npx.h> for the internals of mc_fpstate[].
80	 */
81	int	mc_fpstate[128] __aligned(16);
82
83	__register_t mc_fsbase;
84	__register_t mc_gsbase;
85
86	__register_t mc_xfpustate;
87	__register_t mc_xfpustate_len;
88
89	int	mc_spare2[4];
90} mcontext_t;
91
92#if defined(_KERNEL) && defined(COMPAT_FREEBSD4)
93struct mcontext4 {
94	__register_t	mc_onstack;	/* XXX - sigcontext compat. */
95	__register_t	mc_gs;		/* machine state (struct trapframe) */
96	__register_t	mc_fs;
97	__register_t	mc_es;
98	__register_t	mc_ds;
99	__register_t	mc_edi;
100	__register_t	mc_esi;
101	__register_t	mc_ebp;
102	__register_t	mc_isp;
103	__register_t	mc_ebx;
104	__register_t	mc_edx;
105	__register_t	mc_ecx;
106	__register_t	mc_eax;
107	__register_t	mc_trapno;
108	__register_t	mc_err;
109	__register_t	mc_eip;
110	__register_t	mc_cs;
111	__register_t	mc_eflags;
112	__register_t	mc_esp;		/* machine state */
113	__register_t	mc_ss;
114	__register_t	mc_fpregs[28];	/* env87 + fpacc87 + u_long */
115	__register_t	__spare__[17];
116};
117#endif
118
119#endif /* !_MACHINE_UCONTEXT_H_ */
120