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#include <sys/_ucontext.h> 37 38#define UCF_SWAPPED 0x00000001 /* Used by swapcontext(3). */ 39 40#if defined(_KERNEL) && defined(COMPAT_FREEBSD4) 41#if defined(__i386__) 42struct ucontext4 { 43 sigset_t uc_sigmask; 44 struct mcontext4 uc_mcontext; 45 struct ucontext4 *uc_link; 46 stack_t uc_stack; 47 int __spare__[8]; 48}; 49#else /* __i386__ */ 50#define ucontext4 ucontext 51#endif /* __i386__ */ 52#endif /* _KERNEL */ 53 54#ifndef _KERNEL 55 56__BEGIN_DECLS 57 58int getcontext(ucontext_t *) __returns_twice; 59ucontext_t *getcontextx(void); 60int setcontext(const ucontext_t *); 61void makecontext(ucontext_t *, void (*)(void), int, ...); 62int signalcontext(ucontext_t *, int, __sighandler_t *); 63int swapcontext(ucontext_t *, const ucontext_t *); 64 65#if __BSD_VISIBLE 66int __getcontextx_size(void); 67int __fillcontextx(char *ctx) __returns_twice; 68int __fillcontextx2(char *ctx); 69#endif 70 71__END_DECLS 72 73#else /* _KERNEL */ 74 75struct thread; 76 77/* 78 * Flags for get_mcontext(). The low order 4 bits (i.e a mask of 0x0f) are 79 * reserved for use by machine independent code. All other bits are for use 80 * by machine dependent code. 81 */ 82#define GET_MC_CLEAR_RET 1 83 84/* Machine-dependent functions: */ 85int get_mcontext(struct thread *, mcontext_t *, int); 86int set_mcontext(struct thread *, mcontext_t *); 87 88#endif /* !_KERNEL */ 89 90#endif /* !_SYS_UCONTEXT_H_ */ 91