/*-
 * SPDX-License-Identifier: BSD-3-Clause
 *
 * Copyright (c) 1999 Marcel Moolenaar
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer 
 *    in this position and unchanged.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef _MACHINE_SIGFRAME_H_
#define _MACHINE_SIGFRAME_H_

/*
 * Signal frames, arguments passed to application signal handlers.
 */
#ifdef _KERNEL
#ifdef COMPAT_43
struct osigframe {
        /*
         * The first four members may be used by applications.
         */

        register_t      sf_signum;

        /*
         * Either 'int' for old-style FreeBSD handler or 'siginfo_t *'
         * pointing to sf_siginfo for SA_SIGINFO handlers.
         */
        register_t      sf_arg2;

        /* Points to sf_siginfo.si_sc. */
        register_t      sf_scp;

        register_t      sf_addr;

        /*
         * The following arguments are not constrained by the
         * function call protocol.
         * Applications are not supposed to access these members,
         * except using the pointers we provide in the first three
         * arguments.
         */

        union {
                __osiginfohandler_t     *sf_action;
                __sighandler_t          *sf_handler;
        } sf_ahu;

        /* In the SA_SIGINFO case, sf_arg2 points here. */
        osiginfo_t      sf_siginfo;
};
#endif
#ifdef COMPAT_FREEBSD4
/* FreeBSD 4.x */
struct freebsd4_sigframe {
        register_t      sf_signum;
        register_t      sf_siginfo;     /* code or pointer to sf_si */
        register_t      sf_ucontext;    /* points to sf_uc */
        register_t      sf_addr;        /* undocumented 4th arg */

        union {
                __siginfohandler_t      *sf_action;
                __sighandler_t          *sf_handler;
        } sf_ahu;
        struct freebsd4_ucontext sf_uc;         /* = *sf_ucontext */
        siginfo_t       sf_si;          /* = *sf_siginfo (SA_SIGINFO case) */
};
#endif
#endif

#include <x86/sigframe.h>

#endif /* !_MACHINE_SIGFRAME_H_ */