vax.c revision 1.14
1 /* $NetBSD: vax.c,v 1.14 2013/04/04 12:55:30 martin 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 * 22 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 23 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 24 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 25 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 26 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 32 * POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35 /* 36 * Copyright (c) 1999 Christopher G. Demetriou. All rights reserved. 37 * 38 * Redistribution and use in source and binary forms, with or without 39 * modification, are permitted provided that the following conditions 40 * are met: 41 * 1. Redistributions of source code must retain the above copyright 42 * notice, this list of conditions and the following disclaimer. 43 * 2. Redistributions in binary form must reproduce the above copyright 44 * notice, this list of conditions and the following disclaimer in the 45 * documentation and/or other materials provided with the distribution. 46 * 3. All advertising materials mentioning features or use of this software 47 * must display the following acknowledgement: 48 * This product includes software developed by Christopher G. Demetriou 49 * for the NetBSD Project. 50 * 4. The name of the author may not be used to endorse or promote products 51 * derived from this software without specific prior written permission 52 * 53 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 54 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 55 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 56 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 57 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 58 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 59 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 60 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 61 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 62 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 63 */ 64 65 #if HAVE_NBTOOL_CONFIG_H 66 #include "nbtool_config.h" 67 #endif 68 69 #include <sys/cdefs.h> 70 #if !defined(__lint) 71 __RCSID("$NetBSD: vax.c,v 1.14 2013/04/04 12:55:30 martin Exp $"); 72 #endif /* !__lint */ 73 74 #include <sys/param.h> 75 #include <sys/disklabel.h> 76 77 #include <assert.h> 78 #include <err.h> 79 #include <stddef.h> 80 #include <stdio.h> 81 #include <stdlib.h> 82 #include <string.h> 83 #include <unistd.h> 84 85 #include "installboot.h" 86 87 static int load_bootstrap(ib_params *, char **, 88 uint32_t *, uint32_t *, size_t *); 89 90 static int vax_clearboot(ib_params *); 91 static int vax_setboot(ib_params *); 92 93 struct ib_mach ib_mach_vax = 94 { "vax", vax_setboot, vax_clearboot, no_editboot, 95 IB_STAGE1START | IB_APPEND | IB_SUNSUM }; 96 97 static int 98 vax_clearboot(ib_params *params) 99 { 100 struct vax_boot_block bb; 101 ssize_t rv; 102 103 assert(params != NULL); 104 assert(params->fsfd != -1); 105 assert(params->filesystem != NULL); 106 __CTASSERT(sizeof(bb)==VAX_BOOT_BLOCK_BLOCKSIZE); 107 108 rv = pread(params->fsfd, &bb, sizeof(bb), VAX_BOOT_BLOCK_OFFSET); 109 if (rv == -1) { 110 warn("Reading `%s'", params->filesystem); 111 return (0); 112 } else if (rv != sizeof(bb)) { 113 warnx("Reading `%s': short read", params->filesystem); 114 return (0); 115 } 116 117 if (bb.bb_id_offset*2 >= VAX_BOOT_BLOCK_BLOCKSIZE 118 || bb.bb_magic1 != VAX_BOOT_MAGIC1) { 119 warnx( 120 "Old boot block magic number invalid; boot block invalid"); 121 return (0); 122 } 123 124 bb.bb_id_offset = 1; 125 bb.bb_mbone = 0; 126 bb.bb_lbn_hi = 0; 127 bb.bb_lbn_low = 0; 128 129 if (params->flags & IB_SUNSUM) { 130 uint16_t sum; 131 132 sum = compute_sunsum((uint16_t *)&bb); 133 if (! set_sunsum(params, (uint16_t *)&bb, sum)) 134 return (0); 135 } 136 137 if (params->flags & IB_VERBOSE) 138 printf("%slearing boot block\n", 139 (params->flags & IB_NOWRITE) ? "Not c" : "C"); 140 if (params->flags & IB_NOWRITE) 141 return (1); 142 143 rv = pwrite(params->fsfd, &bb, sizeof(bb), VAX_BOOT_BLOCK_OFFSET); 144 if (rv == -1) { 145 warn("Writing `%s'", params->filesystem); 146 return (0); 147 } else if (rv != sizeof(bb)) { 148 warnx("Writing `%s': short write", params->filesystem); 149 return (0); 150 } 151 152 return (1); 153 } 154 155 static int 156 vax_setboot(ib_params *params) 157 { 158 struct stat bootstrapsb; 159 struct vax_boot_block *bb; 160 uint32_t startblock; 161 int retval; 162 char *bootstrapbuf, oldbb[VAX_BOOT_BLOCK_BLOCKSIZE]; 163 size_t bootstrapsize; 164 uint32_t bootstrapload, bootstrapexec; 165 ssize_t rv; 166 167 assert(params != NULL); 168 assert(params->fsfd != -1); 169 assert(params->filesystem != NULL); 170 assert(params->s1fd != -1); 171 assert(params->stage1 != NULL); 172 173 /* see sys/arch/vax/boot/xxboot/start.S for explanation */ 174 __CTASSERT(offsetof(struct vax_boot_block,bb_magic1) == 0x19e); 175 __CTASSERT(sizeof(struct vax_boot_block) == VAX_BOOT_BLOCK_BLOCKSIZE); 176 177 startblock = 0; 178 retval = 0; 179 bootstrapbuf = NULL; 180 181 if (fstat(params->s1fd, &bootstrapsb) == -1) { 182 warn("Examining `%s'", params->stage1); 183 goto done; 184 } 185 if (!S_ISREG(bootstrapsb.st_mode)) { 186 warnx("`%s' must be a regular file", params->stage1); 187 goto done; 188 } 189 if (! load_bootstrap(params, &bootstrapbuf, &bootstrapload, 190 &bootstrapexec, &bootstrapsize)) 191 goto done; 192 193 /* read old boot block */ 194 rv = pread(params->fsfd, oldbb, sizeof(oldbb), VAX_BOOT_BLOCK_OFFSET); 195 if (rv == -1) { 196 warn("Reading `%s'", params->filesystem); 197 goto done; 198 } else if (rv != sizeof(oldbb)) { 199 warnx("Reading `%s': short read", params->filesystem); 200 goto done; 201 } 202 203 /* 204 * Copy disklabel from old boot block to new. 205 * Assume everything between LABELOFFSET and the start of 206 * the param block is scratch area and can be copied over. 207 */ 208 memcpy(bootstrapbuf+LABELOFFSET, 209 oldbb+LABELOFFSET, 210 offsetof(struct vax_boot_block,bb_magic1)-LABELOFFSET); 211 212 /* point to bootblock at begining of bootstrap */ 213 bb = (struct vax_boot_block*)bootstrapbuf; 214 215 /* fill in the updated boot block fields */ 216 if (params->flags & IB_APPEND) { 217 struct stat filesyssb; 218 219 if (fstat(params->fsfd, &filesyssb) == -1) { 220 warn("Examining `%s'", params->filesystem); 221 goto done; 222 } 223 if (!S_ISREG(filesyssb.st_mode)) { 224 warnx( 225 "`%s' must be a regular file to append a bootstrap", 226 params->filesystem); 227 goto done; 228 } 229 startblock = howmany(filesyssb.st_size, 230 VAX_BOOT_BLOCK_BLOCKSIZE); 231 bb->bb_lbn_hi = htole16((uint16_t) (startblock >> 16)); 232 bb->bb_lbn_low = htole16((uint16_t) (startblock >> 0)); 233 } 234 235 if (params->flags & IB_SUNSUM) { 236 uint16_t sum; 237 238 sum = compute_sunsum((uint16_t *)bb); 239 if (! set_sunsum(params, (uint16_t *)bb, sum)) 240 goto done; 241 } 242 243 if (params->flags & IB_VERBOSE) { 244 printf("Bootstrap start sector: %u\n", startblock); 245 printf("Bootstrap sector count: %u\n", le32toh(bb->bb_size)); 246 printf("%sriting bootstrap\n", 247 (params->flags & IB_NOWRITE) ? "Not w" : "W"); 248 } 249 if (params->flags & IB_NOWRITE) { 250 retval = 1; 251 goto done; 252 } 253 rv = pwrite(params->fsfd, bootstrapbuf, bootstrapsize, 0); 254 if (rv == -1) { 255 warn("Writing `%s'", params->filesystem); 256 goto done; 257 } else if ((size_t)rv != bootstrapsize) { 258 warnx("Writing `%s': short write", params->filesystem); 259 goto done; 260 } 261 retval = 1; 262 263 done: 264 if (bootstrapbuf) 265 free(bootstrapbuf); 266 return (retval); 267 } 268 269 static int 270 load_bootstrap(ib_params *params, char **data, 271 uint32_t *loadaddr, uint32_t *execaddr, size_t *len) 272 { 273 ssize_t cc; 274 size_t buflen; 275 276 buflen = 512 * (VAX_BOOT_SIZE + 1); 277 *data = malloc(buflen); 278 if (*data == NULL) { 279 warn("Allocating %lu bytes", (unsigned long) buflen); 280 return (0); 281 } 282 283 cc = pread(params->s1fd, *data, buflen, 0); 284 if (cc <= 0) { 285 warn("Reading `%s'", params->stage1); 286 return (0); 287 } 288 if (cc > 512 * VAX_BOOT_SIZE) { 289 warnx("`%s': too large", params->stage1); 290 return (0); 291 } 292 293 *len = roundup(cc, VAX_BOOT_BLOCK_BLOCKSIZE); 294 *loadaddr = VAX_BOOT_LOAD; 295 *execaddr = VAX_BOOT_ENTRY; 296 return (1); 297 } 298
Indexes created Thu Sep 25 16:09:42 GMT 2025