The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/i386/include/signal.h

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    1 /*
    2  * Copyright (c) 1986, 1989, 1991, 1993
    3  *      The Regents of the University of California.  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  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  * 3. All advertising materials mentioning features or use of this software
   14  *    must display the following acknowledgement:
   15  *      This product includes software developed by the University of
   16  *      California, Berkeley and its contributors.
   17  * 4. Neither the name of the University nor the names of its contributors
   18  *    may be used to endorse or promote products derived from this software
   19  *    without specific prior written permission.
   20  *
   21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   31  * SUCH DAMAGE.
   32  *
   33  *      @(#)signal.h    8.1 (Berkeley) 6/11/93
   34  * $FreeBSD: stable/4/sys/i386/include/signal.h 53108 1999-11-12 13:52:11Z marcel $
   35  */
   36 
   37 #ifndef _MACHINE_SIGNAL_H_
   38 #define _MACHINE_SIGNAL_H_
   39 
   40 /*
   41  * Machine-dependent signal definitions
   42  */
   43 
   44 typedef int sig_atomic_t;
   45 
   46 #if !defined(_ANSI_SOURCE) && !defined(_POSIX_SOURCE)
   47 
   48 #include <machine/trap.h>       /* codes for SIGILL, SIGFPE */
   49 
   50 /*
   51  * Information pushed on stack when a signal is delivered.
   52  * This is used by the kernel to restore state following
   53  * execution of the signal handler.  It is also made available
   54  * to the handler to allow it to restore state properly if
   55  * a non-standard exit is performed.
   56  */
   57 typedef unsigned int osigset_t;
   58 
   59 struct  osigcontext {
   60         int     sc_onstack;             /* sigstack state to restore */
   61         osigset_t sc_mask;              /* signal mask to restore */
   62         int     sc_esp;                 /* machine state follows: */
   63         int     sc_ebp;
   64         int     sc_isp;
   65         int     sc_eip;
   66         int     sc_efl;
   67         int     sc_es;
   68         int     sc_ds;
   69         int     sc_cs;
   70         int     sc_ss;
   71         int     sc_edi;
   72         int     sc_esi;
   73         int     sc_ebx;
   74         int     sc_edx;
   75         int     sc_ecx;
   76         int     sc_eax;
   77         int     sc_gs;
   78         int     sc_fs;
   79         int     sc_trapno;
   80         int     sc_err;
   81 };
   82 
   83 /*
   84  * The sequence of the fields/registers in struct sigcontext should match
   85  * those in mcontext_t.
   86  */
   87 struct  sigcontext {
   88         sigset_t sc_mask;               /* signal mask to restore */
   89         int     sc_onstack;             /* sigstack state to restore */
   90         int     sc_gs;                  /* machine state (struct trapframe): */
   91         int     sc_fs;
   92         int     sc_es;
   93         int     sc_ds;
   94         int     sc_edi;
   95         int     sc_esi;
   96         int     sc_ebp;
   97         int     sc_isp;
   98         int     sc_ebx;
   99         int     sc_edx;
  100         int     sc_ecx;
  101         int     sc_eax;
  102         int     sc_trapno;
  103         int     sc_err;
  104         int     sc_eip;
  105         int     sc_cs;
  106         int     sc_efl;
  107         int     sc_esp;
  108         int     sc_ss;
  109         /*
  110          * XXX FPU state is 27 * 4 bytes h/w, 1 * 4 bytes s/w (probably not
  111          * needed here), or that + 16 * 4 bytes for emulators (probably all
  112          * needed here).  The "spare" bytes are mostly not spare.
  113          */
  114         int     sc_fpregs[28];          /* machine state (FPU): */
  115         int     sc_spare[17];
  116 };
  117 
  118 #define sc_sp           sc_esp
  119 #define sc_fp           sc_ebp
  120 #define sc_pc           sc_eip
  121 #define sc_ps           sc_efl
  122 #define sc_eflags       sc_efl
  123 
  124 #endif /* !_ANSI_SOURCE && !_POSIX_SOURCE */
  125 
  126 #endif /* !_MACHINE_SIGNAL_H_ */

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