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
57 struct Struct_Obj_Entry;
58 struct ps_strings;
59
60 extern void _start(int, char **, char **, const struct Struct_Obj_Entry *,
61 void (*)(void), struct ps_strings *);
62
63 #ifdef GCRT
64 extern void _mcleanup(void);
65 extern void monstartup(void *, void *);
66 extern int eprol;
67 extern int etext;
68 #endif
69
70 struct ps_strings *__ps_strings;
71
72 void __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 */
96 void
__start(int argc,char ** argv,char ** env,struct ps_strings * ps_strings,const struct Struct_Obj_Entry * obj __unused,void (* cleanup)(void))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
118 static 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