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 #if defined(__minix) 61 #define _UC_SWAPPED 0x10000 62 #define _UC_IGNFPU 0x20000 63 #define _UC_IGNSIGM 0x40000 64 #endif /* defined(__minix) */ 65 #define _UC_MD 0x400f0020 /* MD bits. see below */ 66 67 /* 68 * if your port needs more MD bits, please try to choose bits from _UC_MD 69 * first, rather than picking random unused bits. 70 * 71 * _UC_MD details 72 * 73 * _UC_TLSBASE Context contains valid pthread private pointer 74 * All ports must define this MD flag 75 * 0x00040000 hppa, mips 76 * 0x00000020 alpha 77 * 0x00080000 all other ports 78 * 79 * _UC_SETSTACK Context uses signal stack 80 * 0x00020000 arm 81 * [undefined] alpha, powerpc and vax 82 * 0x00010000 other ports 83 * 84 * _UC_CLRSTACK Context does not use signal stack 85 * 0x00040000 arm 86 * [undefined] alpha, powerpc and vax 87 * 0x00020000 other ports 88 * 89 * _UC_POWERPC_VEC Context does not use signal stack 90 * 0x00010000 powerpc only 91 * 92 * _UC_POWERPC_SPE Context contains valid SPE context 93 * 0x00020000 powerpc only 94 * 95 * _UC_M68K_UC_USER Used by m68k machdep code, but undocumented 96 * 0x40000000 m68k only 97 * 98 * _UC_ARM_VFP Unused 99 * 0x00010000 arm only 100 * 101 * _UC_VM Context contains valid virtual 8086 context 102 * 0x00040000 i386, amd64 only 103 * 104 * _UC_FXSAVE Context contains FPU context in that 105 * is in FXSAVE format in XMM space 106 * 0x00000020 i386, amd64 only 107 */ 108 109 #ifdef _KERNEL 110 struct lwp; 111 112 void getucontext(struct lwp *, ucontext_t *); 113 int setucontext(struct lwp *, const ucontext_t *); 114 void cpu_getmcontext(struct lwp *, mcontext_t *, unsigned int *); 115 int cpu_setmcontext(struct lwp *, const mcontext_t *, unsigned int); 116 int cpu_mcontext_validate(struct lwp *, const mcontext_t *); 117 118 #ifdef __UCONTEXT_SIZE 119 __CTASSERT(sizeof(ucontext_t) == __UCONTEXT_SIZE); 120 #endif 121 #endif /* _KERNEL */ 122 123 #if defined(__minix) 124 __BEGIN_DECLS 125 void resumecontext(ucontext_t *ucp); 126 127 /* These functions get and set ucontext structure through PM/kernel. They don't 128 * manipulate the stack. */ 129 int getuctx(ucontext_t *ucp); 130 int setuctx(const ucontext_t *ucp); 131 __END_DECLS 132 #endif /* defined(__minix) */ 133 134 #endif /* !_SYS_UCONTEXT_H_ */ 135