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/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: stable/12/sys/i386/include/sigframe.h 326260 2017-11-27 15:08:52Z pfg $
   31  */
   32 
   33 #ifndef _MACHINE_SIGFRAME_H_
   34 #define _MACHINE_SIGFRAME_H_
   35 
   36 /*
   37  * Signal frames, arguments passed to application signal handlers.
   38  */
   39 #ifdef _KERNEL
   40 #ifdef COMPAT_43
   41 struct osigframe {
   42         /*
   43          * The first four members may be used by applications.
   44          */
   45 
   46         register_t      sf_signum;
   47 
   48         /*
   49          * Either 'int' for old-style FreeBSD handler or 'siginfo_t *'
   50          * pointing to sf_siginfo for SA_SIGINFO handlers.
   51          */
   52         register_t      sf_arg2;
   53 
   54         /* Points to sf_siginfo.si_sc. */
   55         register_t      sf_scp;
   56 
   57         register_t      sf_addr;
   58 
   59         /*
   60          * The following arguments are not constrained by the
   61          * function call protocol.
   62          * Applications are not supposed to access these members,
   63          * except using the pointers we provide in the first three
   64          * arguments.
   65          */
   66 
   67         union {
   68                 __osiginfohandler_t     *sf_action;
   69                 __sighandler_t          *sf_handler;
   70         } sf_ahu;
   71 
   72         /* In the SA_SIGINFO case, sf_arg2 points here. */
   73         osiginfo_t      sf_siginfo;
   74 };
   75 #endif
   76 #ifdef COMPAT_FREEBSD4
   77 /* FreeBSD 4.x */
   78 struct sigframe4 {
   79         register_t      sf_signum;
   80         register_t      sf_siginfo;     /* code or pointer to sf_si */
   81         register_t      sf_ucontext;    /* points to sf_uc */
   82         register_t      sf_addr;        /* undocumented 4th arg */
   83 
   84         union {
   85                 __siginfohandler_t      *sf_action;
   86                 __sighandler_t          *sf_handler;
   87         } sf_ahu;
   88         struct ucontext4 sf_uc;         /* = *sf_ucontext */
   89         siginfo_t       sf_si;          /* = *sf_siginfo (SA_SIGINFO case) */
   90 };
   91 #endif
   92 #endif
   93 
   94 #include <x86/sigframe.h>
   95 
   96 #endif /* !_MACHINE_SIGFRAME_H_ */

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