sys/cpu/x86_64/include/signal.h

   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 /*
  39  * Machine-dependent signal definitions
  40  */
  41
  42 typedef int sig_atomic_t;
  43
  44 #if __BSD_VISIBLE
  45
  46 #include <machine/trap.h>       /* codes for SIGILL, SIGFPE */
  47
  48 /*
  49  * Information pushed on stack when a signal is delivered.
  50  * This is used by the kernel to restore state following
  51  * execution of the signal handler.  It is also made available
  52  * to the handler to allow it to restore state properly if
  53  * a non-standard exit is performed.
  54  *
  55  * The sequence of the fields/registers in struct sigcontext should match
  56  * those in mcontext_t.
  57  */
  58 struct  sigcontext {
  59         sigset_t        sc_mask;        /* signal mask to restore */
  60
  61         long            sc_onstack;     /* sigstack state to restore */
  62         long            sc_rdi;
  63         long            sc_rsi;
  64         long            sc_rdx;
  65         long            sc_rcx;
  66         long            sc_r8;
  67         long            sc_r9;
  68         long            sc_rax;
  69         long            sc_rbx;
  70         long            sc_rbp;
  71         long            sc_r10;
  72         long            sc_r11;
  73         long            sc_r12;
  74         long            sc_r13;
  75         long            sc_r14;
  76         long            sc_r15;
  77         long            sc_xflags;
  78         long            sc_trapno;
  79         long            sc_addr;
  80         long            sc_flags;
  81         long            sc_err;
  82         long            sc_rip;
  83         long            sc_cs;
  84         long            sc_rflags;
  85         long            sc_rsp;
  86         long            sc_ss;
  87
  88         unsigned int    sc_len;
  89         unsigned int    sc_fpformat;
  90         unsigned int    sc_ownedfp;
  91         unsigned int    sc_reserved;
  92         unsigned int    sc_unused[8];
  93
  94         /* 64 byte aligned */
  95         int             sc_fpregs[256]; /* 1024 bytes */
  96 } __attribute__((aligned(64)));
  97
  98 #endif /* __BSD_VISIBLE */
  99
 100 /*
 101  * Tells the kernel how many pages to drop the signal trampoline down
 102  * when mapping it.  Must be at least 1 page because kern_exec mprotects
 103  * it to R+X (making it unwritable).
 104  */
 105 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
 106 #define SZSIGCODE_EXTRA_BYTES   (1*PAGE_SIZE)
 107 #endif
 108
 109 #endif /* !_CPU_SIGNAL_H_ */