crt1.c revision 331722 
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: stable/11/lib/csu/sparc64/crt1.c 331722 2018-03-29 02:50:57Z eadler $");
35
36#include <stdlib.h>
37
38#include "libc_private.h"
39#include "crtbrand.c"
40#include "ignore_init.c"
41
42struct Struct_Obj_Entry;
43struct ps_strings;
44
45extern void __sparc_utrap_setup(void);
46
47#ifdef GCRT
48extern void _mcleanup(void);
49extern void monstartup(void *, void *);
50extern int eprol;
51extern int etext;
52#endif
53
54void _start(char **, void (*)(void), struct Struct_Obj_Entry *,
55    struct ps_strings *);
56
57/* The entry function. */
58/*
59 * %o0 holds ps_strings pointer.
60 *
61 * Note: kernel may (is not set in stone yet) pass ELF aux vector in %o1,
62 * but for now we do not use it here.
63 *
64 * The SPARC compliance definitions specifies that the kernel pass the
65 * address of a function to be executed on exit in %g1. We do not make
66 * use of it as it is quite broken, because gcc can use this register
67 * as a temporary, so it is not safe from C code. Its even more broken
68 * for dynamic executables since rtld runs first.
69 */
70/* ARGSUSED */
71void
72_start(char **ap, void (*cleanup)(void), struct Struct_Obj_Entry *obj __unused,
73    struct ps_strings *ps_strings __unused)
74{
75	int argc;
76	char **argv;
77	char **env;
78
79	argc = *(long *)(void *)ap;
80	argv = ap + 1;
81	env  = ap + 2 + argc;
82	handle_argv(argc, argv, env);
83
84	if (&_DYNAMIC != NULL)
85		atexit(cleanup);
86	else {
87		__sparc_utrap_setup();
88		_init_tls();
89	}
90#ifdef GCRT
91	atexit(_mcleanup);
92	monstartup(&eprol, &etext);
93#endif
94
95	handle_static_init(argc, argv, env);
96	exit(main(argc, argv, env));
97}
98
99#ifdef GCRT
100__asm__(".text");
101__asm__("eprol:");
102__asm__(".previous");
103#endif
104