ucontext.h revision 103408 
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: head/sys/amd64/include/ucontext.h 103408 2002-09-16 19:25:41Z mini $
29 */
30
31#ifndef _MACHINE_UCONTEXT_H_
32#define	_MACHINE_UCONTEXT_H_
33
34typedef struct __mcontext {
35	/*
36	 * The first 20 fields must match the definition of
37	 * sigcontext. So that we can support sigcontext
38	 * and ucontext_t at the same time.
39	 */
40	int	mc_onstack;		/* XXX - sigcontext compat. */
41	int	mc_gs;
42	int	mc_fs;
43	int	mc_es;
44	int	mc_ds;
45	int	mc_edi;
46	int	mc_esi;
47	int	mc_ebp;
48	int	mc_isp;
49	int	mc_ebx;
50	int	mc_edx;
51	int	mc_ecx;
52	int	mc_eax;
53	int	mc_trapno;
54	int	mc_err;
55	int	mc_eip;
56	int	mc_cs;
57	int	mc_eflags;
58	int	mc_esp;			/* machine state */
59	int	mc_ss;
60
61	int	mc_len;			/* sizeof(mcontext_t) */
62#define	_MC_FPFMT_NODEV		0	/* device not present or configured */
63#define	_MC_FPFMT_387		1
64#define	_MC_FPFMT_XMM		2
65	int	mc_fpformat;
66#define	_MC_FPOWNED_NONE	0	/* FP state not used */
67#define	_MC_FPOWNED_FPU		1	/* FP state came from FPU */
68#define	_MC_FPOWNED_PCB		2	/* FP state came from PCB */
69	int	mc_ownedfp;
70	int	mc_spare1[1];		/* align next field to 16 bytes */
71	int	mc_fpstate[128];	/* must be multiple of 16 bytes */
72	int	mc_spare2[8];
73} mcontext_t;
74
75#ifdef _KERNEL
76struct thread;
77
78void	get_mcontext(struct thread *td, mcontext_t *mcp);
79int	set_mcontext(struct thread *td, const mcontext_t *mcp);
80#endif
81
82#endif /* !_MACHINE_UCONTEXT_H_ */
83