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__) 42 struct 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 58 int getcontext(ucontext_t *) __returns_twice; 59 ucontext_t *getcontextx(void); 60 int setcontext(const ucontext_t *); 61 void makecontext(ucontext_t *, void (*)(void), int, ...); 62 int signalcontext(ucontext_t *, int, __sighandler_t *); 63 int swapcontext(ucontext_t *, const ucontext_t *); 64 65 #if __BSD_VISIBLE 66 int __getcontextx_size(void); 67 int __fillcontextx(char *ctx) __returns_twice; 68 int __fillcontextx2(char *ctx); 69 #endif 70 71 __END_DECLS 72 73 #else /* _KERNEL */ 74 75 struct 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: */ 85 int get_mcontext(struct thread *, mcontext_t *, int); 86 int set_mcontext(struct thread *, mcontext_t *); 87 88 #endif /* !_KERNEL */ 89 90 #endif /* !_SYS_UCONTEXT_H_ */ 91