xref: /freebsd/sys/i386/include/ucontext.h (revision 1e413cf93298b5b97441a21d9a50fdcd0ee9945e)
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 typedef 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 	__register_t	mc_onstack;	/* XXX - sigcontext compat. */
41 	__register_t	mc_gs;		/* machine state (struct trapframe) */
42 	__register_t	mc_fs;
43 	__register_t	mc_es;
44 	__register_t	mc_ds;
45 	__register_t	mc_edi;
46 	__register_t	mc_esi;
47 	__register_t	mc_ebp;
48 	__register_t	mc_isp;
49 	__register_t	mc_ebx;
50 	__register_t	mc_edx;
51 	__register_t	mc_ecx;
52 	__register_t	mc_eax;
53 	__register_t	mc_trapno;
54 	__register_t	mc_err;
55 	__register_t	mc_eip;
56 	__register_t	mc_cs;
57 	__register_t	mc_eflags;
58 	__register_t	mc_esp;
59 	__register_t	mc_ss;
60 
61 	int	mc_len;			/* sizeof(mcontext_t) */
62 #define	_MC_FPFMT_NODEV		0x10000	/* device not present or configured */
63 #define	_MC_FPFMT_387		0x10001
64 #define	_MC_FPFMT_XMM		0x10002
65 	int	mc_fpformat;
66 #define	_MC_FPOWNED_NONE	0x20000	/* FP state not used */
67 #define	_MC_FPOWNED_FPU		0x20001	/* FP state came from FPU */
68 #define	_MC_FPOWNED_PCB		0x20002	/* FP state came from PCB */
69 	int	mc_ownedfp;
70 	int	mc_spare1[1];		/* align next field to 16 bytes */
71 	/*
72 	 * See <machine/npx.h> for the internals of mc_fpstate[].
73 	 */
74 	int	mc_fpstate[128] __aligned(16);
75 	int	mc_spare2[8];
76 } mcontext_t;
77 
78 #if defined(_KERNEL) && defined(COMPAT_FREEBSD4)
79 struct mcontext4 {
80 	__register_t	mc_onstack;	/* XXX - sigcontext compat. */
81 	__register_t	mc_gs;		/* machine state (struct trapframe) */
82 	__register_t	mc_fs;
83 	__register_t	mc_es;
84 	__register_t	mc_ds;
85 	__register_t	mc_edi;
86 	__register_t	mc_esi;
87 	__register_t	mc_ebp;
88 	__register_t	mc_isp;
89 	__register_t	mc_ebx;
90 	__register_t	mc_edx;
91 	__register_t	mc_ecx;
92 	__register_t	mc_eax;
93 	__register_t	mc_trapno;
94 	__register_t	mc_err;
95 	__register_t	mc_eip;
96 	__register_t	mc_cs;
97 	__register_t	mc_eflags;
98 	__register_t	mc_esp;		/* machine state */
99 	__register_t	mc_ss;
100 	__register_t	mc_fpregs[28];	/* env87 + fpacc87 + u_long */
101 	__register_t	__spare__[17];
102 };
103 #endif
104 
105 #endif /* !_MACHINE_UCONTEXT_H_ */
106