vax.c revision 1.1
1 /* $NetBSD: vax.c,v 1.1 2002/04/03 09:09:04 lukem Exp $ */ 2 3 /*- 4 * Copyright (c) 1999, 2002 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Simon Burge. 9 * 10 * This code is derived from software contributed to The NetBSD Foundation 11 * by Luke Mewburn of Wasabi Systems. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 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 by the NetBSD 24 * Foundation, Inc. and its contributors. 25 * 4. Neither the name of The NetBSD Foundation nor the names of its 26 * contributors may be used to endorse or promote products derived 27 * from this software without specific prior written permission. 28 * 29 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 30 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 31 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 32 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 33 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 34 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 35 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 36 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 37 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 38 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 39 * POSSIBILITY OF SUCH DAMAGE. 40 */ 41 42 /* 43 * Copyright (c) 1999 Christopher G. Demetriou. All rights reserved. 44 * 45 * Redistribution and use in source and binary forms, with or without 46 * modification, are permitted provided that the following conditions 47 * are met: 48 * 1. Redistributions of source code must retain the above copyright 49 * notice, this list of conditions and the following disclaimer. 50 * 2. Redistributions in binary form must reproduce the above copyright 51 * notice, this list of conditions and the following disclaimer in the 52 * documentation and/or other materials provided with the distribution. 53 * 3. All advertising materials mentioning features or use of this software 54 * must display the following acknowledgement: 55 * This product includes software developed by Christopher G. Demetriou 56 * for the NetBSD Project. 57 * 4. The name of the author may not be used to endorse or promote products 58 * derived from this software without specific prior written permission 59 * 60 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 61 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 62 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 63 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 64 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 65 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 66 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 67 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 68 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 69 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 70 */ 71 72 #include <sys/cdefs.h> 73 #if defined(__RCSID) && !defined(__lint) 74 __RCSID("$NetBSD: vax.c,v 1.1 2002/04/03 09:09:04 lukem Exp $"); 75 #endif /* !__lint */ 76 77 #include <sys/param.h> 78 #include <sys/stat.h> 79 80 #include <assert.h> 81 #include <err.h> 82 #include <stddef.h> 83 #include <stdio.h> 84 #include <stdlib.h> 85 #include <unistd.h> 86 87 #include <dev/dec/dec_boot.h> 88 89 #include "installboot.h" 90 91 int vax_parseopt(ib_params *, const char *); 92 int vax_setboot(ib_params *); 93 int vax_clearboot(ib_params *); 94 static int load_bootstrap(ib_params *, char **, 95 u_int32_t *, u_int32_t *, size_t *); 96 97 98 int 99 vax_parseopt(ib_params *params, const char *option) 100 { 101 102 if (parseoptionflag(params, option, IB_APPEND | IB_SUNSUM)) 103 return (1); 104 105 warnx("Unknown -o option `%s'", option); 106 return (0); 107 } 108 109 int 110 vax_clearboot(ib_params *params) 111 { 112 struct vax_boot_block bb; 113 ssize_t rv; 114 115 assert(params != NULL); 116 assert(params->fsfd != -1); 117 assert(params->filesystem != NULL); 118 assert(sizeof(struct vax_boot_block) == VAX_BOOT_BLOCK_BLOCKSIZE); 119 120 if (params->flags & (IB_STARTBLOCK | IB_APPEND)) { 121 warnx("Can't use `-b bno' or `-o append' with `-c'"); 122 return (0); 123 } 124 rv = pread(params->fsfd, &bb, sizeof(bb), VAX_BOOT_BLOCK_OFFSET); 125 if (rv == -1) { 126 warn("Reading `%s'", params->filesystem); 127 return (0); 128 } else if (rv != sizeof(bb)) { 129 warnx("Reading `%s': short read", params->filesystem); 130 return (0); 131 } 132 133 if (bb.bb_id_offset * 2 != offsetof(struct vax_boot_block, bb_magic1) 134 || bb.bb_magic1 != VAX_BOOT_MAGIC1) { 135 warnx( 136 "Old boot block magic number invalid; boot block invalid"); 137 return (0); 138 } 139 140 bb.bb_id_offset = 1; 141 bb.bb_mbone = 0; 142 bb.bb_lbn_hi = 0; 143 bb.bb_lbn_low = 0; 144 145 if (params->flags & IB_SUNSUM) { 146 u_int16_t sum; 147 148 sum = compute_sunsum((u_int16_t *)&bb); 149 if (! set_sunsum(params, (u_int16_t *)&bb, sum)) 150 return (0); 151 } 152 153 if (params->flags & IB_VERBOSE) 154 printf("%slearing boot block\n", 155 (params->flags & IB_NOWRITE) ? "Not c" : "C"); 156 if (params->flags & IB_NOWRITE) 157 return (1); 158 159 rv = pwrite(params->fsfd, &bb, sizeof(bb), VAX_BOOT_BLOCK_OFFSET); 160 if (rv == -1) { 161 warn("Writing `%s'", params->filesystem); 162 return (0); 163 } else if (rv != sizeof(bb)) { 164 warnx("Writing `%s': short write", params->filesystem); 165 return (0); 166 } 167 168 return (1); 169 } 170 171 int 172 vax_setboot(ib_params *params) 173 { 174 struct stat bootstrapsb; 175 struct vax_boot_block bb; 176 int startblock, retval; 177 char *bootstrapbuf; 178 size_t bootstrapsize; 179 u_int32_t bootstrapload, bootstrapexec; 180 ssize_t rv; 181 182 assert(params != NULL); 183 assert(params->fsfd != -1); 184 assert(params->filesystem != NULL); 185 assert(params->bbfd != -1); 186 assert(params->bootblock != NULL); 187 assert(sizeof(struct vax_boot_block) == VAX_BOOT_BLOCK_BLOCKSIZE); 188 189 retval = 0; 190 bootstrapbuf = NULL; 191 192 if ((params->flags & IB_STARTBLOCK) && 193 (params->flags & IB_APPEND)) { 194 warnx("Can't use `-b bno' with `-o append'"); 195 goto done; 196 } 197 198 if (fstat(params->bbfd, &bootstrapsb) == -1) { 199 warn("Examining `%s'", params->bootblock); 200 goto done; 201 } 202 if (!S_ISREG(bootstrapsb.st_mode)) { 203 warnx("`%s' must be a regular file", params->bootblock); 204 goto done; 205 } 206 if (! load_bootstrap(params, &bootstrapbuf, &bootstrapload, 207 &bootstrapexec, &bootstrapsize)) 208 goto done; 209 210 rv = pread(params->fsfd, &bb, sizeof(bb), VAX_BOOT_BLOCK_OFFSET); 211 if (rv == -1) { 212 warn("Reading `%s'", params->filesystem); 213 goto done; 214 } else if (rv != sizeof(bb)) { 215 warnx("Reading `%s': short read", params->filesystem); 216 goto done; 217 } 218 219 /* fill in the updated boot block fields */ 220 if (params->flags & IB_APPEND) { 221 struct stat filesyssb; 222 223 if (fstat(params->fsfd, &filesyssb) == -1) { 224 warn("Examining `%s'", params->filesystem); 225 goto done; 226 } 227 if (!S_ISREG(filesyssb.st_mode)) { 228 warnx( 229 "`%s' must be a regular file to append a boot block", 230 params->filesystem); 231 goto done; 232 } 233 startblock = howmany(filesyssb.st_size, 234 VAX_BOOT_BLOCK_BLOCKSIZE); 235 } else if (params->flags & IB_STARTBLOCK) { 236 startblock = params->startblock; 237 } else { 238 startblock = VAX_BOOT_BLOCK_OFFSET / VAX_BOOT_BLOCK_BLOCKSIZE 239 + 1; 240 } 241 242 bb.bb_id_offset = offsetof(struct vax_boot_block, bb_magic1) / 2; 243 bb.bb_mbone = 1; 244 bb.bb_lbn_hi = htole16((u_int16_t) (startblock >> 16)); 245 bb.bb_lbn_low = htole16((u_int16_t) (startblock >> 0)); 246 /* 247 * Now the identification block 248 */ 249 bb.bb_magic1 = VAX_BOOT_MAGIC1; 250 bb.bb_mbz1 = 0; 251 bb.bb_sum1 = ~(bb.bb_magic1 + bb.bb_mbz1 + bb.bb_pad1); 252 253 bb.bb_mbz2 = 0; 254 bb.bb_volinfo = VAX_BOOT_VOLINFO_NONE; 255 bb.bb_pad2a = 0; 256 bb.bb_pad2b = 0; 257 258 bb.bb_size = htole32(bootstrapsize / VAX_BOOT_BLOCK_BLOCKSIZE); 259 bb.bb_load = htole32(VAX_BOOT_LOAD); 260 bb.bb_entry = htole32(VAX_BOOT_ENTRY); 261 bb.bb_sum3 = htole32(le32toh(bb.bb_size) + le32toh(bb.bb_load) \ 262 + le32toh(bb.bb_entry)); 263 264 if (params->flags & IB_SUNSUM) { 265 u_int16_t sum; 266 267 sum = compute_sunsum((u_int16_t *)&bb); 268 if (! set_sunsum(params, (u_int16_t *)&bb, sum)) 269 goto done; 270 } 271 272 if (params->flags & IB_VERBOSE) { 273 printf("Bootstrap start sector: %#x\n", startblock); 274 printf("Bootstrap sector count: %#x\n", le32toh(bb.bb_size)); 275 printf("%sriting bootstrap\n", 276 (params->flags & IB_NOWRITE) ? "Not w" : "W"); 277 } 278 if (params->flags & IB_NOWRITE) { 279 retval = 1; 280 goto done; 281 } 282 rv = pwrite(params->fsfd, bootstrapbuf, bootstrapsize, 283 startblock * VAX_BOOT_BLOCK_BLOCKSIZE); 284 if (rv == -1) { 285 warn("Writing `%s'", params->filesystem); 286 goto done; 287 } else if (rv != bootstrapsize) { 288 warnx("Writing `%s': short write", params->filesystem); 289 goto done; 290 } 291 292 if (params->flags & IB_VERBOSE) 293 printf("Writing boot block\n"); 294 rv = pwrite(params->fsfd, &bb, sizeof(bb), VAX_BOOT_BLOCK_OFFSET); 295 if (rv == -1) { 296 warn("Writing `%s'", params->filesystem); 297 goto done; 298 } else if (rv != sizeof(bb)) { 299 warnx("Writing `%s': short write", params->filesystem); 300 goto done; 301 } else { 302 retval = 1; 303 } 304 305 done: 306 if (bootstrapbuf) 307 free(bootstrapbuf); 308 return (retval); 309 } 310 311 static int 312 load_bootstrap(ib_params *params, char **data, 313 u_int32_t *loadaddr, u_int32_t *execaddr, size_t *len) 314 { 315 ssize_t cc; 316 size_t buflen; 317 318 buflen = 512 * (VAX_BOOT_SIZE + 1); 319 *data = malloc(buflen); 320 if (*data == NULL) { 321 warn("Allocating %lu bytes", (unsigned long) buflen); 322 return (0); 323 } 324 325 cc = pread(params->bbfd, *data, buflen, 0); 326 if (cc <= 0) { 327 warn("Reading `%s'", params->bootblock); 328 return (0); 329 } 330 if (cc > 512 * VAX_BOOT_SIZE) { 331 warnx("`%s': too large", params->bootblock); 332 return (0); 333 } 334 335 *len = roundup(cc, VAX_BOOT_BLOCK_BLOCKSIZE); 336 *loadaddr = VAX_BOOT_LOAD; 337 *execaddr = VAX_BOOT_ENTRY; 338 return (1); 339 } 340
Indexes created Thu Sep 25 16:09:42 GMT 2025