1 /* $OpenBSD: bootarg.c,v 1.12 2015/09/02 01:52:26 yasuoka 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 static 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 -= p->ba_size; 63 break; 64 } 65 } 66 *lenp = l; 67 /* copy them out */ 68 for (p = bootarg_list, q = v; 69 p != NULL && ((q + p->ba_size) - (u_char *)v) <= l - sizeof(*p); 70 q += p->ba_size, p = p->ba_next) { 71 #ifdef DEBUG 72 printf("%d,%d ", p->ba_type, p->ba_size); 73 #endif 74 bcopy(p, q, p->ba_size); 75 } 76 p = (bootarg_t *)q; 77 p->ba_type = BOOTARG_END; 78 } 79 80 void 81 makebootargs32(caddr_t v, size_t *lenp) 82 { 83 bootarg_t *p; 84 u_char *q; 85 size_t l; 86 size_t adj; 87 struct bootarg32 { 88 int ba_type; 89 int ba_size; 90 int ba_nextX; 91 char ba_arg[1]; 92 } *p32; 93 94 adj = (ssize_t)sizeof(struct bootarg32) - sizeof(bootarg_t); 95 /* get total size */ 96 l = sizeof(*p32); 97 for (p = bootarg_list; p != NULL; p = p->ba_next) { 98 l += p->ba_size + adj; 99 if (*lenp < l) { 100 #ifdef DEBUG 101 printf("makebootargs: too many args\n"); 102 #endif 103 l -= p->ba_size + adj; 104 break; 105 } 106 } 107 *lenp = l; 108 /* copy them out */ 109 for (p = bootarg_list, q = v; p != NULL; p = p->ba_next) { 110 if (q + p->ba_size + adj > (u_char *)v + l - sizeof(*p32)) 111 break; 112 p32 = (struct bootarg32 *)q; 113 p32->ba_type = p->ba_type; 114 p32->ba_size = p->ba_size + adj; 115 bcopy(p->ba_arg, p32->ba_arg, 116 p->ba_size - (sizeof(*p) - sizeof(p->ba_arg))); 117 #ifdef DEBUG 118 printf("%d,%d ", p->ba_type, p->ba_size); 119 #endif 120 q += p32->ba_size; 121 } 122 p32 = (struct bootarg32 *)q; 123 p32->ba_type = BOOTARG_END; 124 } 125