ucontext.h revision 229023 
1/*-
2 * Copyright (c) 2003 Peter Wemm
3 * Copyright (c) 1999 Marcel Moolenaar
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer
11 *    in this position and unchanged.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. The name of the author may not be used to endorse or promote products
16 *    derived from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 *
29 * $FreeBSD: stable/9/sys/amd64/include/ucontext.h 229023 2011-12-30 20:35:13Z kib $
30 */
31
32#ifndef _MACHINE_UCONTEXT_H_
33#define	_MACHINE_UCONTEXT_H_
34
35/*
36 * mc_trapno bits. Shall be in sync with TF_XXX.
37 */
38#define	_MC_HASSEGS	0x1
39#define	_MC_HASBASES	0x2
40#define	_MC_FLAG_MASK	(_MC_HASSEGS | _MC_HASBASES)
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_rdi;		/* machine state (struct trapframe) */
51	__register_t	mc_rsi;
52	__register_t	mc_rdx;
53	__register_t	mc_rcx;
54	__register_t	mc_r8;
55	__register_t	mc_r9;
56	__register_t	mc_rax;
57	__register_t	mc_rbx;
58	__register_t	mc_rbp;
59	__register_t	mc_r10;
60	__register_t	mc_r11;
61	__register_t	mc_r12;
62	__register_t	mc_r13;
63	__register_t	mc_r14;
64	__register_t	mc_r15;
65	__uint32_t	mc_trapno;
66	__uint16_t	mc_fs;
67	__uint16_t	mc_gs;
68	__register_t	mc_addr;
69	__uint32_t	mc_flags;
70	__uint16_t	mc_es;
71	__uint16_t	mc_ds;
72	__register_t	mc_err;
73	__register_t	mc_rip;
74	__register_t	mc_cs;
75	__register_t	mc_rflags;
76	__register_t	mc_rsp;
77	__register_t	mc_ss;
78
79	long	mc_len;			/* sizeof(mcontext_t) */
80
81#define	_MC_FPFMT_NODEV		0x10000	/* device not present or configured */
82#define	_MC_FPFMT_XMM		0x10002
83	long	mc_fpformat;
84#define	_MC_FPOWNED_NONE	0x20000	/* FP state not used */
85#define	_MC_FPOWNED_FPU		0x20001	/* FP state came from FPU */
86#define	_MC_FPOWNED_PCB		0x20002	/* FP state came from PCB */
87	long	mc_ownedfp;
88	/*
89	 * See <machine/fpu.h> for the internals of mc_fpstate[].
90	 */
91	long	mc_fpstate[64] __aligned(16);
92
93	__register_t	mc_fsbase;
94	__register_t	mc_gsbase;
95
96	long	mc_spare[6];
97} mcontext_t;
98
99#endif /* !_MACHINE_UCONTEXT_H_ */
100