1 /* 2 * Copyright (c) 1986, 1989, 1991, 1993 3 * The Regents of the University of California. 4 * Copyright (c) 2008 The DragonFly Project. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * @(#)signal.h 8.1 (Berkeley) 6/11/93 32 * $FreeBSD: src/sys/i386/include/signal.h,v 1.12 1999/11/12 13:52:11 marcel Exp $ 33 */ 34 35 #ifndef _CPU_SIGNAL_H_ 36 #define _CPU_SIGNAL_H_ 37 38 #include <sys/cdefs.h> 39 40 /* 41 * Machine-dependent signal definitions 42 */ 43 44 typedef int sig_atomic_t; 45 46 #if __BSD_VISIBLE 47 48 #include <sys/_sigset.h> 49 #include <machine/trap.h> /* codes for SIGILL, SIGFPE */ 50 51 /* 52 * Information pushed on stack when a signal is delivered. 53 * This is used by the kernel to restore state following 54 * execution of the signal handler. It is also made available 55 * to the handler to allow it to restore state properly if 56 * a non-standard exit is performed. 57 * 58 * The sequence of the fields/registers in struct sigcontext should match 59 * those in mcontext_t. 60 */ 61 struct sigcontext { 62 sigset_t sc_mask; /* signal mask to restore */ 63 64 long sc_onstack; /* sigstack state to restore */ 65 long sc_rdi; 66 long sc_rsi; 67 long sc_rdx; 68 long sc_rcx; 69 long sc_r8; 70 long sc_r9; 71 long sc_rax; 72 long sc_rbx; 73 long sc_rbp; 74 long sc_r10; 75 long sc_r11; 76 long sc_r12; 77 long sc_r13; 78 long sc_r14; 79 long sc_r15; 80 long sc_xflags; 81 long sc_trapno; 82 long sc_addr; 83 long sc_flags; 84 long sc_err; 85 long sc_rip; 86 long sc_cs; 87 long sc_rflags; 88 long sc_rsp; 89 long sc_ss; 90 91 unsigned int sc_len; 92 unsigned int sc_fpformat; 93 unsigned int sc_ownedfp; 94 unsigned int sc_reserved; 95 unsigned int sc_unused[8]; 96 97 /* 64 byte aligned */ 98 int sc_fpregs[256]; /* 1024 bytes */ 99 } __aligned(64); 100 101 #endif /* __BSD_VISIBLE */ 102 103 /* 104 * Tells the kernel how many pages to drop the signal trampoline down 105 * when mapping it. Must be at least 1 page because kern_exec mprotects 106 * it to R+X (making it unwritable). 107 */ 108 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) 109 #define SZSIGCODE_EXTRA_BYTES (1*PAGE_SIZE) 110 #endif 111 112 #endif /* !_CPU_SIGNAL_H_ */ 113