vax.c revision 1.15
1 /* $NetBSD: vax.c,v 1.15 2013/04/04 16:11:12 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 1.15 2013/04/04 16:11:12 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 #ifndef __CTASSERT 88 #define __CTASSERT(X) 89 #endif 90 91 static int load_bootstrap(ib_params *, char **, 92 uint32_t *, uint32_t *, size_t *); 93 94 static int vax_clearboot(ib_params *); 95 static int vax_setboot(ib_params *); 96 97 struct ib_mach ib_mach_vax = 98 { "vax", vax_setboot, vax_clearboot, no_editboot, 99 IB_STAGE1START | IB_APPEND | IB_SUNSUM }; 100 101 static int 102 vax_clearboot(ib_params *params) 103 { 104 struct vax_boot_block bb; 105 ssize_t rv; 106 107 assert(params != NULL); 108 assert(params->fsfd != -1); 109 assert(params->filesystem != NULL); 110 __CTASSERT(sizeof(bb)==VAX_BOOT_BLOCK_BLOCKSIZE); 111 112 rv = pread(params->fsfd, &bb, sizeof(bb), VAX_BOOT_BLOCK_OFFSET); 113 if (rv == -1) { 114 warn("Reading `%s'", params->filesystem); 115 return (0); 116 } else if (rv != sizeof(bb)) { 117 warnx("Reading `%s': short read", params->filesystem); 118 return (0); 119 } 120 121 if (bb.bb_id_offset*2 >= VAX_BOOT_BLOCK_BLOCKSIZE 122 || bb.bb_magic1 != VAX_BOOT_MAGIC1) { 123 warnx( 124 "Old boot block magic number invalid; boot block invalid"); 125 return (0); 126 } 127 128 bb.bb_id_offset = 1; 129 bb.bb_mbone = 0; 130 bb.bb_lbn_hi = 0; 131 bb.bb_lbn_low = 0; 132 133 if (params->flags & IB_SUNSUM) { 134 uint16_t sum; 135 136 sum = compute_sunsum((uint16_t *)&bb); 137 if (! set_sunsum(params, (uint16_t *)&bb, sum)) 138 return (0); 139 } 140 141 if (params->flags & IB_VERBOSE) 142 printf("%slearing boot block\n", 143 (params->flags & IB_NOWRITE) ? "Not c" : "C"); 144 if (params->flags & IB_NOWRITE) 145 return (1); 146 147 rv = pwrite(params->fsfd, &bb, sizeof(bb), VAX_BOOT_BLOCK_OFFSET); 148 if (rv == -1) { 149 warn("Writing `%s'", params->filesystem); 150 return (0); 151 } else if (rv != sizeof(bb)) { 152 warnx("Writing `%s': short write", params->filesystem); 153 return (0); 154 } 155 156 return (1); 157 } 158 159 static int 160 vax_setboot(ib_params *params) 161 { 162 struct stat bootstrapsb; 163 struct vax_boot_block *bb; 164 uint32_t startblock; 165 int retval; 166 char *bootstrapbuf, oldbb[VAX_BOOT_BLOCK_BLOCKSIZE]; 167 size_t bootstrapsize; 168 uint32_t bootstrapload, bootstrapexec; 169 ssize_t rv; 170 171 assert(params != NULL); 172 assert(params->fsfd != -1); 173 assert(params->filesystem != NULL); 174 assert(params->s1fd != -1); 175 assert(params->stage1 != NULL); 176 177 /* see sys/arch/vax/boot/xxboot/start.S for explanation */ 178 __CTASSERT(offsetof(struct vax_boot_block,bb_magic1) == 0x19e); 179 __CTASSERT(sizeof(struct vax_boot_block) == VAX_BOOT_BLOCK_BLOCKSIZE); 180 181 startblock = 0; 182 retval = 0; 183 bootstrapbuf = NULL; 184 185 if (fstat(params->s1fd, &bootstrapsb) == -1) { 186 warn("Examining `%s'", params->stage1); 187 goto done; 188 } 189 if (!S_ISREG(bootstrapsb.st_mode)) { 190 warnx("`%s' must be a regular file", params->stage1); 191 goto done; 192 } 193 if (! load_bootstrap(params, &bootstrapbuf, &bootstrapload, 194 &bootstrapexec, &bootstrapsize)) 195 goto done; 196 197 /* read old boot block */ 198 rv = pread(params->fsfd, oldbb, sizeof(oldbb), VAX_BOOT_BLOCK_OFFSET); 199 if (rv == -1) { 200 warn("Reading `%s'", params->filesystem); 201 goto done; 202 } else if (rv != sizeof(oldbb)) { 203 warnx("Reading `%s': short read", params->filesystem); 204 goto done; 205 } 206 207 /* 208 * Copy disklabel from old boot block to new. 209 * Assume everything between LABELOFFSET and the start of 210 * the param block is scratch area and can be copied over. 211 */ 212 memcpy(bootstrapbuf+LABELOFFSET, 213 oldbb+LABELOFFSET, 214 offsetof(struct vax_boot_block,bb_magic1)-LABELOFFSET); 215 216 /* point to bootblock at begining of bootstrap */ 217 bb = (struct vax_boot_block*)bootstrapbuf; 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 bootstrap", 230 params->filesystem); 231 goto done; 232 } 233 startblock = howmany(filesyssb.st_size, 234 VAX_BOOT_BLOCK_BLOCKSIZE); 235 bb->bb_lbn_hi = htole16((uint16_t) (startblock >> 16)); 236 bb->bb_lbn_low = htole16((uint16_t) (startblock >> 0)); 237 } 238 239 if (params->flags & IB_SUNSUM) { 240 uint16_t sum; 241 242 sum = compute_sunsum((uint16_t *)bb); 243 if (! set_sunsum(params, (uint16_t *)bb, sum)) 244 goto done; 245 } 246 247 if (params->flags & IB_VERBOSE) { 248 printf("Bootstrap start sector: %u\n", startblock); 249 printf("Bootstrap sector count: %u\n", le32toh(bb->bb_size)); 250 printf("%sriting bootstrap\n", 251 (params->flags & IB_NOWRITE) ? "Not w" : "W"); 252 } 253 if (params->flags & IB_NOWRITE) { 254 retval = 1; 255 goto done; 256 } 257 rv = pwrite(params->fsfd, bootstrapbuf, bootstrapsize, 0); 258 if (rv == -1) { 259 warn("Writing `%s'", params->filesystem); 260 goto done; 261 } else if ((size_t)rv != bootstrapsize) { 262 warnx("Writing `%s': short write", params->filesystem); 263 goto done; 264 } 265 retval = 1; 266 267 done: 268 if (bootstrapbuf) 269 free(bootstrapbuf); 270 return (retval); 271 } 272 273 static int 274 load_bootstrap(ib_params *params, char **data, 275 uint32_t *loadaddr, uint32_t *execaddr, size_t *len) 276 { 277 ssize_t cc; 278 size_t buflen; 279 280 buflen = 512 * (VAX_BOOT_SIZE + 1); 281 *data = malloc(buflen); 282 if (*data == NULL) { 283 warn("Allocating %lu bytes", (unsigned long) buflen); 284 return (0); 285 } 286 287 cc = pread(params->s1fd, *data, buflen, 0); 288 if (cc <= 0) { 289 warn("Reading `%s'", params->stage1); 290 return (0); 291 } 292 if (cc > 512 * VAX_BOOT_SIZE) { 293 warnx("`%s': too large", params->stage1); 294 return (0); 295 } 296 297 *len = roundup(cc, VAX_BOOT_BLOCK_BLOCKSIZE); 298 *loadaddr = VAX_BOOT_LOAD; 299 *execaddr = VAX_BOOT_ENTRY; 300 return (1); 301 } 302
Indexes created Thu Sep 25 16:09:42 GMT 2025