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/x86/include/sigframe.h

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    1 /*-
    2  * SPDX-License-Identifier: BSD-3-Clause
    3  *
    4  * Copyright (c) 1999 Marcel Moolenaar
    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  *    in this position and unchanged.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  * 3. The name of the author may not be used to endorse or promote products
   17  *    derived from this software without specific prior written permission.
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   20  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   21  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   22  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   23  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   24  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   28  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   29  *
   30  * $FreeBSD$
   31  */
   32 
   33 #ifndef _X86_SIGFRAME_H_
   34 #define _X86_SIGFRAME_H_
   35 
   36 /*
   37  * Signal frames, arguments passed to application signal handlers.
   38  */
   39 
   40 #ifdef __i386__
   41 struct sigframe {
   42         /*
   43          * The first four members may be used by applications.
   44          *
   45          * NOTE: The 4th argument is undocumented, ill commented
   46          * on and seems to be somewhat BSD "standard".  Handlers
   47          * installed with sigvec may be using it.
   48          */
   49         register_t      sf_signum;
   50         register_t      sf_siginfo;     /* code or pointer to sf_si */
   51         register_t      sf_ucontext;    /* points to sf_uc */
   52         register_t      sf_addr;        /* undocumented 4th arg */
   53 
   54         union {
   55                 __siginfohandler_t      *sf_action;
   56                 __sighandler_t          *sf_handler;
   57         } sf_ahu;
   58         ucontext_t      sf_uc;          /* = *sf_ucontext */
   59         siginfo_t       sf_si;          /* = *sf_siginfo (SA_SIGINFO case) */
   60 };
   61 #endif /* __i386__ */
   62 
   63 #ifdef __amd64__
   64 struct sigframe {
   65         union {
   66                 __siginfohandler_t      *sf_action;
   67                 __sighandler_t          *sf_handler;
   68         } sf_ahu;
   69         ucontext_t      sf_uc;          /* = *sf_ucontext */
   70         siginfo_t       sf_si;          /* = *sf_siginfo (SA_SIGINFO case) */
   71 };
   72 #endif /* __amd64__ */
   73 
   74 #endif /* _X86_SIGFRAME_H_ */

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