1 /* $OpenBSD: bootarg.c,v 1.10 2003/08/11 06:23:07 deraadt Exp $ */
2
3 /*
4 * Copyright (c) 1997,1998 Michael Shalayeff
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
18 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 */
29
30 #include <lib/libsa/stand.h>
31 #include <stand/boot/bootarg.h>
32
33 bootarg_t *bootarg_list;
34
35 void
36 addbootarg(int t, size_t l, void *p)
37 {
38 bootarg_t *q = alloc(sizeof(*q) + l - sizeof(q->ba_arg));
39
40 q->ba_type = t;
41 q->ba_size = sizeof(*q) + l - sizeof(q->ba_arg);
42 bcopy(p, q->ba_arg, l);
43 q->ba_next = bootarg_list;
44 bootarg_list = q;
45 }
46
47 void
48 makebootargs(caddr_t v, size_t *lenp)
49 {
50 bootarg_t *p;
51 u_char *q;
52 size_t l;
53
54 /* get total size */
55 l = sizeof(*p);
56 for (p = bootarg_list; p != NULL; p = p->ba_next)
57 l += p->ba_size;
58 if (*lenp < l) {
59 #ifdef DEBUG
60 printf("makebootargs: too many args\n");
61 #endif
62 l = *lenp;
63 }
64 *lenp = l;
65 /* copy them out */
66 for (p = bootarg_list, q = v;
67 p != NULL && ((q + p->ba_size) - (u_char *)v) < l;
68 q += p->ba_size, p = p->ba_next) {
69 #ifdef DEBUG
70 printf("%d,%d ", p->ba_type, p->ba_size);
71 #endif
72 bcopy(p, q, p->ba_size);
73 }
74 p = (bootarg_t *)q;
75 p->ba_type = BOOTARG_END;
76 }
77