1 /* $OpenBSD: bootarg.c,v 1.9 2003/06/02 20:20:54 mickey 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(t, l, p) 37 int t; 38 size_t l; 39 void *p; 40 { 41 bootarg_t *q = alloc(sizeof(*q) + l - sizeof(q->ba_arg)); 42 43 q->ba_type = t; 44 q->ba_size = sizeof(*q) + l - sizeof(q->ba_arg); 45 bcopy(p, q->ba_arg, l); 46 q->ba_next = bootarg_list; 47 bootarg_list = q; 48 } 49 50 void 51 makebootargs(v, lenp) 52 caddr_t v; 53 size_t *lenp; 54 { 55 register bootarg_t *p; 56 register u_char *q; 57 register size_t l; 58 59 /* get total size */ 60 l = sizeof(*p); 61 for (p = bootarg_list; p != NULL; p = p->ba_next) 62 l += p->ba_size; 63 if (*lenp < l) { 64 #ifdef DEBUG 65 printf("makebootargs: too many args\n"); 66 #endif 67 l = *lenp; 68 } 69 *lenp = l; 70 /* copy them out */ 71 for (p = bootarg_list, q = v; 72 p != NULL && ((q + p->ba_size) - (u_char *)v) < l; 73 q += p->ba_size, p = p->ba_next) { 74 #ifdef DEBUG 75 printf("%d,%d ", p->ba_type, p->ba_size); 76 #endif 77 bcopy(p, q, p->ba_size); 78 } 79 p = (bootarg_t *)q; 80 p->ba_type = BOOTARG_END; 81 } 82 83