/*      $NetBSD: h_execsp.c,v 1.2 2025/04/20 22:31:25 riastradh Exp $   */

/*-
* Copyright (c) 2025 The NetBSD Foundation, Inc.
* 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.
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 FOUNDATION OR CONTRIBUTORS
* 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.
*/

#include <sys/cdefs.h>
__RCSID("$NetBSD: h_execsp.c,v 1.2 2025/04/20 22:31:25 riastradh Exp $");

#include <err.h>
#include <string.h>
#include <unistd.h>

#include "h_execsp.h"

/*
* The machine-dependent execsp.S assembly routines will initialize
* startsp, ctorsp, mainsp, and dtorsp, and then call execsp_main on
* program startup.
*/
void *startsp;
void *ctorsp;
void *mainsp;
void *dtorsp;

int execsp_main(void);
int
execsp_main(void)
{
       struct execsp execsp;
       ssize_t nwrit;

       memset(&execsp, 0, sizeof(execsp));
       execsp.startsp = startsp;
       execsp.ctorsp = ctorsp;
       execsp.mainsp = mainsp;
       execsp.dtorsp = dtorsp;

       nwrit = write(STDOUT_FILENO, &execsp, sizeof(execsp));
       if (nwrit == -1)
               err(1, "write");
       if ((size_t)nwrit != sizeof(execsp))
               errx(1, "wrote %zu != %zu", (size_t)nwrit, sizeof(execsp));

       return 0;
}