xref: /freebsd/lib/csu/riscv/crt1_c.c (revision 550cb4ab85c7e514629c8bacbbb07085b81d916b)
1 /* LINTLIBRARY */
2 /*-
3  * Copyright 1996-1998 John D. Polstra.
4  * Copyright (c) 2015-2017 Ruslan Bukin <br@bsdpad.com>
5  * All rights reserved.
6  *
7  * Portions of this software were developed by SRI International and the
8  * University of Cambridge Computer Laboratory under DARPA/AFRL contract
9  * FA8750-10-C-0237 ("CTSRD"), as part of the DARPA CRASH research programme.
10  *
11  * Portions of this software were developed by the University of Cambridge
12  * Computer Laboratory as part of the CTSRD Project, with support from the
13  * UK Higher Education Innovation Fund (HEIF).
14  *
15  * Redistribution and use in source and binary forms, with or without
16  * modification, are permitted provided that the following conditions
17  * are met:
18  * 1. Redistributions of source code must retain the above copyright
19  *    notice, this list of conditions and the following disclaimer.
20  * 2. Redistributions in binary form must reproduce the above copyright
21  *    notice, this list of conditions and the following disclaimer in the
22  *    documentation and/or other materials provided with the distribution.
23  *
24  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
25  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
26  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
27  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
28  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
29  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
30  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
31  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
32  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
33  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34  */
35 
36 #include <sys/cdefs.h>
37 __FBSDID("$FreeBSD$");
38 
39 #include <stdlib.h>
40 
41 #include "libc_private.h"
42 #include "ignore_init.c"
43 
44 typedef void (*fptr)(void);
45 
46 #ifdef GCRT
47 extern void _mcleanup(void);
48 extern void monstartup(void *, void *);
49 extern int eprol;
50 extern int etext;
51 #endif
52 
53 void __start(int argc, char **argv, char **env, void (*cleanup)(void));
54 
55 void
56 __start(int argc, char **argv, char **env, void (*cleanup)(void))
57 {
58 
59 	handle_argv(argc, argv, env);
60 
61 	if (&_DYNAMIC != NULL)
62 		atexit(cleanup);
63 	else
64 		_init_tls();
65 
66 #ifdef GCRT
67 	atexit(_mcleanup);
68 	monstartup(&eprol, &etext);
69 __asm__("eprol:");
70 #endif
71 
72 	handle_static_init(argc, argv, env);
73 	exit(main(argc, argv, env));
74 }
75