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      1 /*	$NetBSD: h_execsp.c,v 1.2 2025/04/20 22:31:25 riastradh Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2025 The NetBSD Foundation, Inc.
      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  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     17  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     18  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     19  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     20  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     26  * POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 
     29 #include <sys/cdefs.h>
     30 __RCSID("$NetBSD: h_execsp.c,v 1.2 2025/04/20 22:31:25 riastradh Exp $");
     31 
     32 #include <err.h>
     33 #include <string.h>
     34 #include <unistd.h>
     35 
     36 #include "h_execsp.h"
     37 
     38 /*
     39  * The machine-dependent execsp.S assembly routines will initialize
     40  * startsp, ctorsp, mainsp, and dtorsp, and then call execsp_main on
     41  * program startup.
     42  */
     43 void *startsp;
     44 void *ctorsp;
     45 void *mainsp;
     46 void *dtorsp;
     47 
     48 int execsp_main(void);
     49 int
     50 execsp_main(void)
     51 {
     52 	struct execsp execsp;
     53 	ssize_t nwrit;
     54 
     55 	memset(&execsp, 0, sizeof(execsp));
     56 	execsp.startsp = startsp;
     57 	execsp.ctorsp = ctorsp;
     58 	execsp.mainsp = mainsp;
     59 	execsp.dtorsp = dtorsp;
     60 
     61 	nwrit = write(STDOUT_FILENO, &execsp, sizeof(execsp));
     62 	if (nwrit == -1)
     63 		err(1, "write");
     64 	if ((size_t)nwrit != sizeof(execsp))
     65 		errx(1, "wrote %zu != %zu", (size_t)nwrit, sizeof(execsp));
     66 
     67 	return 0;
     68 }
     69