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
execsp_main(void)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