1 | /* $NetBSD: ucontext.h,v 1.18 2013/03/06 18:16:58 pooka Exp $ */ |
2 | |
3 | /*- |
4 | * Copyright (c) 1999, 2003 The NetBSD Foundation, Inc. |
5 | * All rights reserved. |
6 | * |
7 | * This code is derived from software contributed to The NetBSD Foundation |
8 | * by Klaus Klein, and by Jason R. Thorpe. |
9 | * |
10 | * Redistribution and use in source and binary forms, with or without |
11 | * modification, are permitted provided that the following conditions |
12 | * are met: |
13 | * 1. Redistributions of source code must retain the above copyright |
14 | * notice, this list of conditions and the following disclaimer. |
15 | * 2. Redistributions in binary form must reproduce the above copyright |
16 | * notice, this list of conditions and the following disclaimer in the |
17 | * documentation and/or other materials provided with the distribution. |
18 | * |
19 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
20 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
21 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
22 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
23 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
24 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
25 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
26 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
27 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
28 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
29 | * POSSIBILITY OF SUCH DAMAGE. |
30 | */ |
31 | |
32 | #ifndef _SYS_UCONTEXT_H_ |
33 | #define _SYS_UCONTEXT_H_ |
34 | |
35 | #include <sys/sigtypes.h> |
36 | #include <machine/mcontext.h> |
37 | |
38 | typedef struct __ucontext ucontext_t; |
39 | |
40 | struct __ucontext { |
41 | unsigned int uc_flags; /* properties */ |
42 | ucontext_t * uc_link; /* context to resume */ |
43 | sigset_t uc_sigmask; /* signals blocked in this context */ |
44 | stack_t uc_stack; /* the stack used by this context */ |
45 | mcontext_t uc_mcontext; /* machine state */ |
46 | #if defined(_UC_MACHINE_PAD) |
47 | long __uc_pad[_UC_MACHINE_PAD]; |
48 | #endif |
49 | }; |
50 | |
51 | #ifndef _UC_UCONTEXT_ALIGN |
52 | #define _UC_UCONTEXT_ALIGN (~0) |
53 | #endif |
54 | |
55 | /* uc_flags */ |
56 | #define _UC_SIGMASK 0x01 /* valid uc_sigmask */ |
57 | #define _UC_STACK 0x02 /* valid uc_stack */ |
58 | #define _UC_CPU 0x04 /* valid GPR context in uc_mcontext */ |
59 | #define _UC_FPU 0x08 /* valid FPU context in uc_mcontext */ |
60 | #define _UC_MD 0x400f0020 /* MD bits. see below */ |
61 | |
62 | /* |
63 | * if your port needs more MD bits, please try to choose bits from _UC_MD |
64 | * first, rather than picking random unused bits. |
65 | * |
66 | * _UC_MD details |
67 | * |
68 | * _UC_TLSBASE Context contains valid pthread private pointer |
69 | * All ports must define this MD flag |
70 | * 0x00040000 hppa, mips |
71 | * 0x00000020 alpha |
72 | * 0x00080000 all other ports |
73 | * |
74 | * _UC_SETSTACK Context uses signal stack |
75 | * 0x00020000 arm |
76 | * [undefined] alpha, powerpc and vax |
77 | * 0x00010000 other ports |
78 | * |
79 | * _UC_CLRSTACK Context does not use signal stack |
80 | * 0x00040000 arm |
81 | * [undefined] alpha, powerpc and vax |
82 | * 0x00020000 other ports |
83 | * |
84 | * _UC_POWERPC_VEC Context does not use signal stack |
85 | * 0x00010000 powerpc only |
86 | * |
87 | * _UC_POWERPC_SPE Context contains valid SPE context |
88 | * 0x00020000 powerpc only |
89 | * |
90 | * _UC_M68K_UC_USER Used by m68k machdep code, but undocumented |
91 | * 0x40000000 m68k only |
92 | * |
93 | * _UC_ARM_VFP Unused |
94 | * 0x00010000 arm only |
95 | * |
96 | * _UC_VM Context contains valid virtual 8086 context |
97 | * 0x00040000 i386, amd64 only |
98 | * |
99 | * _UC_FXSAVE Context contains FPU context in that |
100 | * is in FXSAVE format in XMM space |
101 | * 0x00000020 i386, amd64 only |
102 | */ |
103 | |
104 | #ifdef _KERNEL |
105 | struct lwp; |
106 | |
107 | void getucontext(struct lwp *, ucontext_t *); |
108 | int setucontext(struct lwp *, const ucontext_t *); |
109 | void cpu_getmcontext(struct lwp *, mcontext_t *, unsigned int *); |
110 | int cpu_setmcontext(struct lwp *, const mcontext_t *, unsigned int); |
111 | int cpu_mcontext_validate(struct lwp *, const mcontext_t *); |
112 | |
113 | #ifdef __UCONTEXT_SIZE |
114 | __CTASSERT(sizeof(ucontext_t) == __UCONTEXT_SIZE); |
115 | #endif |
116 | #endif /* _KERNEL */ |
117 | |
118 | #endif /* !_SYS_UCONTEXT_H_ */ |
119 | |