3 * SPDX-License-Identifier: BSD-4-Clause
5 * Copyright 2001 David E. O'Brien.
7 * Copyright 1996-1998 John D. Polstra.
9 * Copyright (c) 1997 Jason R. Thorpe.
10 * Copyright (c) 1995 Christopher G. Demetriou
11 * All rights reserved.
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. All advertising materials mentioning features or use of this software
22 * must display the following acknowledgement:
23 * This product includes software developed for the
24 * FreeBSD Project. See https://www.freebsd.org/ for
25 * information about FreeBSD.
26 * This product includes software developed for the
27 * NetBSD Project. See http://www.netbsd.org/ for
28 * information about NetBSD.
29 * 4. The name of the author may not be used to endorse or promote products
30 * derived from this software without specific prior written permission
32 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
33 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
34 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
35 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
36 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
37 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
38 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
39 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
40 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
41 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
44 #include <sys/cdefs.h>
45 __FBSDID("$FreeBSD$");
51 static uint32_t cpu_features;
52 static uint32_t cpu_features2;
54 #include "libc_private.h"
55 #include "ignore_init.c"
57 struct Struct_Obj_Entry;
60 extern void _start(int, char **, char **, const struct Struct_Obj_Entry *,
61 void (*)(void), struct ps_strings *);
64 extern void _mcleanup(void);
65 extern void monstartup(void *, void *);
70 struct ps_strings *__ps_strings;
73 init_cpu_features(char **env)
75 const Elf_Auxinfo *aux;
77 /* Find the auxiliary vector on the stack. */
78 while (*env++ != 0) /* Skip over environment, and NULL terminator */
80 aux = (const Elf_Auxinfo *)env;
82 /* Digest the auxiliary vector. */
83 for (; aux->a_type != AT_NULL; aux++) {
84 switch (aux->a_type) {
86 cpu_features = (uint32_t)aux->a_un.a_val;
89 cpu_features2 = (uint32_t)aux->a_un.a_val;
96 /* The entry function. */
98 * First 5 arguments are specified by the PowerPC SVR4 ABI.
99 * The last argument, ps_strings, is a BSD extension.
103 _start(int argc, char **argv, char **env,
104 const struct Struct_Obj_Entry *obj __unused, void (*cleanup)(void),
105 struct ps_strings *ps_strings)
108 handle_argv(argc, argv, env);
110 if (ps_strings != (struct ps_strings *)0)
111 __ps_strings = ps_strings;
113 if (&_DYNAMIC != NULL)
116 init_cpu_features(env);
123 monstartup(&eprol, &etext);
126 handle_static_init(argc, argv, env);
127 exit(main(argc, argv, env));
133 __asm__(".previous");