xref: /freebsd/lib/csu/amd64/crt1_c.c (revision 3c4ba5f55438f7afd4f4b0b56f88f2bb505fd6a6)
1 /* LINTLIBRARY */
2 /*-
3  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4  *
5  * Copyright 1996-1998 John D. Polstra.
6  * All rights reserved.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  * 1. Redistributions of source code must retain the above copyright
12  *    notice, this list of conditions and the following disclaimer.
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  *
17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27  */
28 
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
31 
32 #include "libc_private.h"
33 #include "csu_common.h"
34 
35 void _start(char **, void (*)(void)) __dead2;
36 
37 /* The entry function. */
38 void
39 _start(char **ap, void (*cleanup)(void))
40 {
41 	int argc;
42 	char **argv;
43 	char **env;
44 
45 	argc = *(long *)(void *)ap;
46 	argv = ap + 1;
47 	env = ap + 2 + argc;
48 #ifdef GCRT
49 	__libc_start1_gcrt(argc, argv, env, cleanup, main, &eprol, &etext);
50 __asm__("eprol:");
51 #else
52 	__libc_start1(argc, argv, env, cleanup, main);
53 #endif
54 }
55