crt1.c revision 81586 
1/*-
2 * Copyright 2001 David E. O'Brien.
3 * All rights reserved.
4 * Copyright 1996-1998 John D. Polstra.
5 * All rights reserved.
6 * Copyright (c) 1997 Jason R. Thorpe.
7 * Copyright (c) 1995 Christopher G. Demetriou
8 * All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 *    must display the following acknowledgement:
20 *          This product includes software developed for the
21 *          FreeBSD Project.  See http://www.freebsd.org/ for
22 *          information about FreeBSD.
23 *          This product includes software developed for the
24 *          NetBSD Project.  See http://www.netbsd.org/ for
25 *          information about NetBSD.
26 * 4. The name of the author may not be used to endorse or promote products
27 *    derived from this software without specific prior written permission
28 *
29 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
30 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
31 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
32 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
33 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
34 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
35 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
36 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
37 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
38 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 */
40
41#ifndef __GNUC__
42#error "GCC is needed to compile this file"
43#endif
44
45#include <stdlib.h>
46#include "crtbrand.c"
47
48struct Struct_Obj_Entry;
49struct ps_strings;
50
51#pragma weak _DYNAMIC
52extern int _DYNAMIC;
53
54extern void _init(void);
55extern void _fini(void);
56extern int main(int, char **, char **);
57
58#ifdef GCRT
59extern void _mcleanup(void);
60extern void monstartup(void *, void *);
61extern int eprol;
62extern int etext;
63#endif
64
65/*
66 * First 5 arguments are specified by the PowerPC SVR4 ABI.
67 * The last argument, ps_strings, is a BSD extension.
68 */
69void _start __P((int, char **, char **, const struct Struct_Obj_Entry *,
70		void (*) __P((void)), struct ps_strings *));
71
72char **environ;
73char *__progname = "";
74struct ps_strings *__ps_strings;
75
76/* The entry function. */
77void
78_start(argc, argv, envp, obj, cleanup, ps_strings)
79	int argc;
80	char **argv, **envp;
81	const struct Struct_Obj_Entry *obj;	/* from shared loader */
82	void (*cleanup) __P((void));		/* from shared loader */
83	struct ps_strings *ps_strings;		/* BSD extension */
84{
85	char *namep;
86
87	environ = envp;
88
89	if(argc > 0 && argv[0] != NULL) {
90		char *s;
91		__progname = argv[0];
92		for (s = __progname; *s != '\0'; s++)
93			if (*s == '/')
94				__progname = s + 1;
95	}
96
97	if (ps_strings != (struct ps_strings *)0)
98		__ps_strings = ps_strings;
99
100	if (&_DYNAMIC != NULL)
101		atexit(cleanup);
102
103#ifdef GCRT
104	atexit(_mcleanup);
105#endif
106	atexit(_fini);
107#ifdef GCRT
108	monstartup(&eprol, &etext);
109#endif
110	_init();
111	exit( main(argc, argv, envp) );
112}
113
114#ifdef GCRT
115__asm__(".text");
116__asm__("eprol:");
117__asm__(".previous");
118#endif
119
120/*
121 * NOTE: Leave the RCS ID _after_ __start(), in case it gets placed in .text.
122 */
123#ifndef lint
124static const char rcsid[] =
125  "$FreeBSD: head/lib/csu/powerpc/crt1.c 81586 2001-08-13 14:06:34Z ru $";
126#endif
127