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 _SYS_UCONTEXT_H_ 32#define _SYS_UCONTEXT_H_ 33 34#include <sys/signal.h> 35#include <machine/ucontext.h> 36 37typedef struct __ucontext { 38 /* 39 * Keep the order of the first two fields. Also, 40 * keep them the first two fields in the structure. 41 * This way we can have a union with struct 42 * sigcontext and ucontext_t. This allows us to 43 * support them both at the same time. 44 * note: the union is not defined, though. 45 */ 46 sigset_t uc_sigmask; 47 mcontext_t uc_mcontext; 48 49 struct __ucontext *uc_link; 50 stack_t uc_stack; 51 int uc_flags; 52#define UCF_SWAPPED 0x00000001 /* Used by swapcontext(3). */ 53 int __spare__[4]; 54} ucontext_t; 55 56#if defined(_KERNEL) && defined(COMPAT_FREEBSD4) 57#if defined(__i386__) 58struct ucontext4 { 59 sigset_t uc_sigmask; 60 struct mcontext4 uc_mcontext; 61 struct ucontext4 *uc_link; 62 stack_t uc_stack; 63 int __spare__[8]; 64}; 65#else /* __i386__ */ 66#define ucontext4 ucontext 67#endif /* __i386__ */ 68#endif /* _KERNEL */ 69 70#ifndef _KERNEL 71 72__BEGIN_DECLS 73 74int getcontext(ucontext_t *) __returns_twice; 75ucontext_t *getcontextx(void); 76int setcontext(const ucontext_t *); 77void makecontext(ucontext_t *, void (*)(void), int, ...); 78int signalcontext(ucontext_t *, int, __sighandler_t *); 79int swapcontext(ucontext_t *, const ucontext_t *); 80 81#if __BSD_VISIBLE 82int __getcontextx_size(void); 83int __fillcontextx(char *ctx) __returns_twice; 84int __fillcontextx2(char *ctx); 85#endif 86 87__END_DECLS 88 89#else /* _KERNEL */ 90 91struct thread; 92 93/* 94 * Flags for get_mcontext(). The low order 4 bits (i.e a mask of 0x0f) are 95 * reserved for use by machine independent code. All other bits are for use 96 * by machine dependent code. 97 */ 98#define GET_MC_CLEAR_RET 1 99 100/* Machine-dependent functions: */ 101int get_mcontext(struct thread *, mcontext_t *, int); 102int set_mcontext(struct thread *, const mcontext_t *); 103 104#endif /* !_KERNEL */ 105 106#endif /* !_SYS_UCONTEXT_H_ */ 107