Annotation of sys/stand/boot/bootarg.c, Revision 1.1.1.1
1.1 nbrk 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:
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