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  * 4. Neither the name of the University nor the names of its contributors
   14  *    may be used to endorse or promote products derived from this software
   15  *    without specific prior written permission.
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   27  * SUCH DAMAGE.
   28  *
   29  *      @(#)signal.h    8.1 (Berkeley) 6/11/93
   30  * $FreeBSD: releng/6.4/sys/i386/include/signal.h 139790 2005-01-06 22:18:23Z imp $
   31  */
   32 
   33 #ifndef _MACHINE_SIGNAL_H_
   34 #define _MACHINE_SIGNAL_H_
   35 
   36 #include <sys/cdefs.h>
   37 #include <sys/_sigset.h>
   38 
   39 /*
   40  * Machine-dependent signal definitions
   41  */
   42 
   43 typedef int sig_atomic_t;
   44 
   45 #if __XSI_VISIBLE
   46 /*
   47  * Minimum signal stack size. The current signal frame
   48  * for i386 is 408 bytes large.
   49  */
   50 #define MINSIGSTKSZ     (512 * 4)
   51 #endif
   52 
   53 #if __BSD_VISIBLE
   54 #include <machine/trap.h>       /* codes for SIGILL, SIGFPE */
   55 
   56 /*
   57  * Only the kernel should need these old type definitions.
   58  */
   59 #if defined(_KERNEL) && defined(COMPAT_43)
   60 /*
   61  * Information pushed on stack when a signal is delivered.
   62  * This is used by the kernel to restore state following
   63  * execution of the signal handler.  It is also made available
   64  * to the handler to allow it to restore state properly if
   65  * a non-standard exit is performed.
   66  */
   67 struct osigcontext {
   68         int     sc_onstack;             /* sigstack state to restore */
   69         osigset_t sc_mask;              /* signal mask to restore */
   70         int     sc_esp;                 /* machine state follows: */
   71         int     sc_ebp;
   72         int     sc_isp;
   73         int     sc_eip;
   74         int     sc_efl;
   75         int     sc_es;
   76         int     sc_ds;
   77         int     sc_cs;
   78         int     sc_ss;
   79         int     sc_edi;
   80         int     sc_esi;
   81         int     sc_ebx;
   82         int     sc_edx;
   83         int     sc_ecx;
   84         int     sc_eax;
   85         int     sc_gs;
   86         int     sc_fs;
   87         int     sc_trapno;
   88         int     sc_err;
   89 };
   90 #endif
   91 
   92 /*
   93  * The sequence of the fields/registers in struct sigcontext should match
   94  * those in mcontext_t.
   95  */
   96 struct sigcontext {
   97         struct __sigset sc_mask;        /* signal mask to restore */
   98         int     sc_onstack;             /* sigstack state to restore */
   99         int     sc_gs;                  /* machine state (struct trapframe) */
  100         int     sc_fs;
  101         int     sc_es;
  102         int     sc_ds;
  103         int     sc_edi;
  104         int     sc_esi;
  105         int     sc_ebp;
  106         int     sc_isp;
  107         int     sc_ebx;
  108         int     sc_edx;
  109         int     sc_ecx;
  110         int     sc_eax;
  111         int     sc_trapno;
  112         int     sc_err;
  113         int     sc_eip;
  114         int     sc_cs;
  115         int     sc_efl;
  116         int     sc_esp;
  117         int     sc_ss;
  118         int     sc_len;                 /* sizeof(mcontext_t) */
  119         /*
  120          * XXX - See <machine/ucontext.h> and <machine/npx.h> for
  121          *       the following fields.
  122          */
  123         int     sc_fpformat;
  124         int     sc_ownedfp;
  125         int     sc_spare1[1];
  126         int     sc_fpstate[128] __aligned(16);
  127         int     sc_spare2[8];
  128 };
  129 
  130 #define sc_sp           sc_esp
  131 #define sc_fp           sc_ebp
  132 #define sc_pc           sc_eip
  133 #define sc_ps           sc_efl
  134 #define sc_eflags       sc_efl
  135 
  136 #endif /* __BSD_VISIBLE */
  137 
  138 #endif /* !_MACHINE_SIGNAL_H_ */

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