| 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 | |