1/* LINTLIBRARY */
2/*-
3 * Copyright 2001 David E. O'Brien.
4 * All rights reserved.
5 * Copyright 1996-1998 John D. Polstra.
6 * All rights reserved.
7 * Copyright (c) 1997 Jason R. Thorpe.
8 * Copyright (c) 1995 Christopher G. Demetriou
9 * All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 *    notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 *    notice, this list of conditions and the following disclaimer in the
18 *    documentation and/or other materials provided with the distribution.
19 * 3. All advertising materials mentioning features or use of this software
20 *    must display the following acknowledgement:
21 *          This product includes software developed for the
22 *          FreeBSD Project.  See http://www.freebsd.org/ for
23 *          information about FreeBSD.
24 *          This product includes software developed for the
25 *          NetBSD Project.  See http://www.netbsd.org/ for
26 *          information about NetBSD.
27 * 4. The name of the author may not be used to endorse or promote products
28 *    derived from this software without specific prior written permission
29 *
30 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
31 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
32 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
33 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
34 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
35 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
36 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
37 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
38 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
39 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
40 */
41
42#include <sys/cdefs.h>
43__FBSDID("$FreeBSD$");
44
45#ifndef lint
46#ifndef __GNUC__
47#error "GCC is needed to compile this file"
48#endif
49#endif /* lint */
50
51#include <stdlib.h>
52
53#include "libc_private.h"
54#include "crtbrand.c"
55#include "ignore_init.c"
56
57struct Struct_Obj_Entry;
58struct ps_strings;
59
60extern void _start(int, char **, char **, const struct Struct_Obj_Entry *,
61    void (*)(void), struct ps_strings *);
62
63#ifdef GCRT
64extern void _mcleanup(void);
65extern void monstartup(void *, void *);
66extern int eprol;
67extern int etext;
68#endif
69
70struct ps_strings *__ps_strings;
71
72void __start(int, char **, char **, struct ps_strings *,
73    const struct Struct_Obj_Entry *, void (*)(void));
74
75/* The entry function. */
76__asm("	.text			\n"
77"	.align	0		\n"
78"	.globl	_start		\n"
79"	_start:			\n"
80"	mov	r5, r2		/* cleanup */		\n"
81"	mov	r4, r1		/* obj_main */		\n"
82"	mov	r3, r0		/* ps_strings */	\n"
83"	/* Get argc, argv, and envp from stack */	\n"
84"	ldr	r0, [sp, #0x0000]	\n"
85"	add	r1, sp, #0x0004		\n"
86"	add	r2, r1, r0, lsl #2	\n"
87"	add	r2, r2, #0x0004		\n"
88"	/* Ensure the stack is properly aligned before calling C code. */\n"
89"	bic	sp, sp, #7	\n"
90"	sub	sp, sp, #8	\n"
91"	str	r5, [sp, #4]	\n"
92"	str	r4, [sp, #0]	\n"
93"\n"
94"	b	 __start  ");
95/* ARGSUSED */
96void
97__start(int argc, char **argv, char **env, struct ps_strings *ps_strings,
98    const struct Struct_Obj_Entry *obj __unused, void (*cleanup)(void))
99{
100
101	handle_argv(argc, argv, env);
102
103	if (ps_strings != (struct ps_strings *)0)
104		__ps_strings = ps_strings;
105
106	if (&_DYNAMIC != NULL)
107		atexit(cleanup);
108	else
109		_init_tls();
110#ifdef GCRT
111	atexit(_mcleanup);
112	monstartup(&eprol, &etext);
113#endif
114	handle_static_init(argc, argv, env);
115	exit(main(argc, argv, env));
116}
117
118static const struct {
119	int32_t	namesz;
120	int32_t	descsz;
121	int32_t	type;
122	char	name[sizeof(NOTE_FREEBSD_VENDOR)];
123	char	desc[sizeof(MACHINE_ARCH)];
124} archtag __attribute__ ((section (NOTE_SECTION), aligned(4))) __used = {
125	.namesz = sizeof(NOTE_FREEBSD_VENDOR),
126	.descsz = sizeof(MACHINE_ARCH),
127	.type = ARCH_NOTETYPE,
128	.name = NOTE_FREEBSD_VENDOR,
129	.desc = MACHINE_ARCH
130};
131
132#ifdef GCRT
133__asm__(".text");
134__asm__("eprol:");
135__asm__(".previous");
136#endif
137