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 _MACHINE_SIGFRAME_H_ 32 #define _MACHINE_SIGFRAME_H_ 33 34 /* 35 * Signal frames, arguments passed to application signal handlers. 36 */ 37 38 struct osigframe { 39 /* 40 * The first three members may be used by applications. 41 */ 42 43 register_t sf_signum; 44 45 /* 46 * Either 'int' for old-style FreeBSD handler or 'siginfo_t *' 47 * pointing to sf_siginfo for SA_SIGINFO handlers. 48 */ 49 register_t sf_arg2; 50 51 /* Points to sf_siginfo.si_sc. */ 52 register_t sf_scp; 53 54 /* 55 * The following arguments are not constrained by the 56 * function call protocol. 57 * Applications are not supposed to access these members, 58 * except using the pointers we provide in the first three 59 * arguments. 60 */ 61 62 char *sf_addr; 63 64 union { 65 __osiginfohandler_t *sf_action; 66 __sighandler_t *sf_handler; 67 } sf_ahu; 68 69 /* In the SA_SIGINFO case, sf_arg2 points here. */ 70 osiginfo_t sf_siginfo; 71 }; 72 73 struct sigframe { 74 /* 75 * The first four members may be used by applications. 76 * NOTE: The 4th argument is undocumented, ill commented 77 * on and seems to be somewhat BSD "standard". 78 * Handlers installed with sigvec may be using it. 79 */ 80 register_t sf_signum; 81 register_t sf_siginfo; /* code or pointer to sf_si */ 82 register_t sf_ucontext; /* points to sf_uc */ 83 char *sf_addr; /* undocumented 4th arg */ 84 85 union { 86 __siginfohandler_t *sf_action; 87 __sighandler_t *sf_handler; 88 } sf_ahu; 89 register_t sf_sigreturn; /* sigreturn to use */ 90 siginfo_t sf_si; /* = *sf_siginfo (SA_SIGINFO case) */ 91 ucontext_t sf_uc; /* = *sf_ucontext */ 92 }; 93 94 #endif /* !_MACHINE_SIGFRAME_H_ */ 95