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 #ifdef _KERNEL 38 #ifdef COMPAT_43 39 struct osigframe { 40 /* 41 * The first four members may be used by applications. 42 */ 43 44 register_t sf_signum; 45 46 /* 47 * Either 'int' for old-style FreeBSD handler or 'siginfo_t *' 48 * pointing to sf_siginfo for SA_SIGINFO handlers. 49 */ 50 register_t sf_arg2; 51 52 /* Points to sf_siginfo.si_sc. */ 53 register_t sf_scp; 54 55 register_t sf_addr; 56 57 /* 58 * The following arguments are not constrained by the 59 * function call protocol. 60 * Applications are not supposed to access these members, 61 * except using the pointers we provide in the first three 62 * arguments. 63 */ 64 65 union { 66 __osiginfohandler_t *sf_action; 67 __sighandler_t *sf_handler; 68 } sf_ahu; 69 70 /* In the SA_SIGINFO case, sf_arg2 points here. */ 71 osiginfo_t sf_siginfo; 72 }; 73 #endif 74 #ifdef COMPAT_FREEBSD4 75 /* FreeBSD 4.x */ 76 struct sigframe4 { 77 register_t sf_signum; 78 register_t sf_siginfo; /* code or pointer to sf_si */ 79 register_t sf_ucontext; /* points to sf_uc */ 80 register_t sf_addr; /* undocumented 4th arg */ 81 82 union { 83 __siginfohandler_t *sf_action; 84 __sighandler_t *sf_handler; 85 } sf_ahu; 86 struct ucontext4 sf_uc; /* = *sf_ucontext */ 87 siginfo_t sf_si; /* = *sf_siginfo (SA_SIGINFO case) */ 88 }; 89 #endif 90 #endif 91 92 struct sigframe { 93 /* 94 * The first four members may be used by applications. 95 * 96 * NOTE: The 4th argument is undocumented, ill commented 97 * on and seems to be somewhat BSD "standard". Handlers 98 * installed with sigvec may be using it. 99 */ 100 register_t sf_signum; 101 register_t sf_siginfo; /* code or pointer to sf_si */ 102 register_t sf_ucontext; /* points to sf_uc */ 103 register_t sf_addr; /* undocumented 4th arg */ 104 105 union { 106 __siginfohandler_t *sf_action; 107 __sighandler_t *sf_handler; 108 } sf_ahu; 109 ucontext_t sf_uc; /* = *sf_ucontext */ 110 siginfo_t sf_si; /* = *sf_siginfo (SA_SIGINFO case) */ 111 }; 112 113 #endif /* !_MACHINE_SIGFRAME_H_ */ 114