1/* LINTLIBRARY */
2/*-
3 * Copyright 2001 David E. O'Brien.
4 * All rights reserved.
5 * Copyright (c) 1995, 1998 Berkeley Software Design, Inc.
6 * All rights reserved.
7 * Copyright 1996-1998 John D. Polstra.
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. The name of the authors may not be used to endorse or promote products
19 *    derived from this software without specific prior written permission
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 */
32
33#include <sys/cdefs.h>
34__FBSDID("$FreeBSD$");
35
36#ifndef lint
37#ifndef __GNUC__
38#error "GCC is needed to compile this file"
39#endif
40#endif /* lint */
41
42#include <stdlib.h>
43
44#include "libc_private.h"
45#include "crtbrand.c"
46
47struct Struct_Obj_Entry;
48struct ps_strings;
49
50extern int _DYNAMIC;
51#pragma weak _DYNAMIC
52
53extern void _fini(void);
54extern void _init(void);
55extern int main(int, char **, char **);
56extern void __sparc_utrap_setup(void);
57
58#ifdef GCRT
59extern void _mcleanup(void);
60extern void monstartup(void *, void *);
61extern int eprol;
62extern int etext;
63#endif
64
65char **environ;
66const char *__progname = "";
67
68void _start(char **, void (*)(void), struct Struct_Obj_Entry *,
69    struct ps_strings *);
70
71/* The entry function. */
72/*
73 * %o0 holds ps_strings pointer.
74 *
75 * Note: kernel may (is not set in stone yet) pass ELF aux vector in %o1,
76 * but for now we do not use it here.
77 *
78 * The SPARC compliance definitions specifies that the kernel pass the
79 * address of a function to be executed on exit in %g1. We do not make
80 * use of it as it is quite broken, because gcc can use this register
81 * as a temporary, so it is not safe from C code. Its even more broken
82 * for dynamic executables since rtld runs first.
83 */
84/* ARGSUSED */
85void
86_start(char **ap, void (*cleanup)(void), struct Struct_Obj_Entry *obj __unused,
87    struct ps_strings *ps_strings __unused)
88{
89	int argc;
90	char **argv;
91	char **env;
92	const char *s;
93
94	argc = *(long *)(void *)ap;
95	argv = ap + 1;
96	env  = ap + 2 + argc;
97	if (environ == NULL)
98		environ = env;
99	if (argc > 0 && argv[0] != NULL) {
100		__progname = argv[0];
101		for (s = __progname; *s != '\0'; s++)
102			if (*s == '/')
103				__progname = s + 1;
104	}
105
106	if (&_DYNAMIC != NULL)
107		atexit(cleanup);
108	else {
109		__sparc_utrap_setup();
110		_init_tls();
111	}
112#ifdef GCRT
113	atexit(_mcleanup);
114#endif
115	atexit(_fini);
116#ifdef GCRT
117	monstartup(&eprol, &etext);
118#endif
119	_init();
120	exit( main(argc, argv, env) );
121}
122
123#ifdef GCRT
124__asm__(".text");
125__asm__("eprol:");
126__asm__(".previous");
127#endif
128