vax.c revision 1.13.12.1
1 /* $NetBSD: vax.c,v 1.13.12.1 2013/06/23 06:29:04 tls 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 1.13.12.1 2013/06/23 06:29:04 tls Exp $"); 72 #endif /* !__lint */ 73 74 #include <sys/param.h> 75 #ifdef HAVE_NBTOOL_CONFIG_H 76 #include <nbinclude/vax/disklabel.h> 77 #else 78 #include <sys/disklabel.h> 79 #endif 80 81 #include <assert.h> 82 #include <err.h> 83 #include <stddef.h> 84 #include <stdio.h> 85 #include <stdlib.h> 86 #include <string.h> 87 #include <unistd.h> 88 89 #include "installboot.h" 90 91 #ifndef __CTASSERT 92 #define __CTASSERT(X) 93 #endif 94 95 static int load_bootstrap(ib_params *, char **, 96 uint32_t *, uint32_t *, size_t *); 97 98 static int vax_clearboot(ib_params *); 99 static int vax_setboot(ib_params *); 100 101 struct ib_mach ib_mach_vax = 102 { "vax", vax_setboot, vax_clearboot, no_editboot, 103 IB_STAGE1START | IB_APPEND | IB_SUNSUM }; 104 105 static int 106 vax_clearboot(ib_params *params) 107 { 108 struct vax_boot_block bb; 109 ssize_t rv; 110 111 assert(params != NULL); 112 assert(params->fsfd != -1); 113 assert(params->filesystem != NULL); 114 __CTASSERT(sizeof(bb)==VAX_BOOT_BLOCK_BLOCKSIZE); 115 116 rv = pread(params->fsfd, &bb, sizeof(bb), VAX_BOOT_BLOCK_OFFSET); 117 if (rv == -1) { 118 warn("Reading `%s'", params->filesystem); 119 return (0); 120 } else if (rv != sizeof(bb)) { 121 warnx("Reading `%s': short read", params->filesystem); 122 return (0); 123 } 124 125 if (bb.bb_id_offset*2 >= VAX_BOOT_BLOCK_BLOCKSIZE 126 || bb.bb_magic1 != VAX_BOOT_MAGIC1) { 127 warnx( 128 "Old boot block magic number invalid; boot block invalid"); 129 return (0); 130 } 131 132 bb.bb_id_offset = 1; 133 bb.bb_mbone = 0; 134 bb.bb_lbn_hi = 0; 135 bb.bb_lbn_low = 0; 136 137 if (params->flags & IB_SUNSUM) { 138 uint16_t sum; 139 140 sum = compute_sunsum((uint16_t *)&bb); 141 if (! set_sunsum(params, (uint16_t *)&bb, sum)) 142 return (0); 143 } 144 145 if (params->flags & IB_VERBOSE) 146 printf("%slearing boot block\n", 147 (params->flags & IB_NOWRITE) ? "Not c" : "C"); 148 if (params->flags & IB_NOWRITE) 149 return (1); 150 151 rv = pwrite(params->fsfd, &bb, sizeof(bb), VAX_BOOT_BLOCK_OFFSET); 152 if (rv == -1) { 153 warn("Writing `%s'", params->filesystem); 154 return (0); 155 } else if (rv != sizeof(bb)) { 156 warnx("Writing `%s': short write", params->filesystem); 157 return (0); 158 } 159 160 return (1); 161 } 162 163 static int 164 vax_setboot(ib_params *params) 165 { 166 struct stat bootstrapsb; 167 struct vax_boot_block *bb; 168 uint32_t startblock; 169 int retval; 170 char *bootstrapbuf, oldbb[VAX_BOOT_BLOCK_BLOCKSIZE]; 171 size_t bootstrapsize; 172 uint32_t bootstrapload, bootstrapexec; 173 ssize_t rv; 174 175 assert(params != NULL); 176 assert(params->fsfd != -1); 177 assert(params->filesystem != NULL); 178 assert(params->s1fd != -1); 179 assert(params->stage1 != NULL); 180 181 /* see sys/arch/vax/boot/xxboot/start.S for explanation */ 182 __CTASSERT(offsetof(struct vax_boot_block,bb_magic1) == 0x19e); 183 __CTASSERT(sizeof(struct vax_boot_block) == VAX_BOOT_BLOCK_BLOCKSIZE); 184 185 startblock = 0; 186 retval = 0; 187 bootstrapbuf = NULL; 188 189 if (fstat(params->s1fd, &bootstrapsb) == -1) { 190 warn("Examining `%s'", params->stage1); 191 goto done; 192 } 193 if (!S_ISREG(bootstrapsb.st_mode)) { 194 warnx("`%s' must be a regular file", params->stage1); 195 goto done; 196 } 197 if (! load_bootstrap(params, &bootstrapbuf, &bootstrapload, 198 &bootstrapexec, &bootstrapsize)) 199 goto done; 200 201 /* read old boot block */ 202 rv = pread(params->fsfd, oldbb, sizeof(oldbb), VAX_BOOT_BLOCK_OFFSET); 203 if (rv == -1) { 204 warn("Reading `%s'", params->filesystem); 205 goto done; 206 } else if (rv != sizeof(oldbb)) { 207 warnx("Reading `%s': short read", params->filesystem); 208 goto done; 209 } 210 211 /* 212 * Copy disklabel from old boot block to new. 213 * Assume everything between LABELOFFSET and the start of 214 * the param block is scratch area and can be copied over. 215 */ 216 memcpy(bootstrapbuf+LABELOFFSET, 217 oldbb+LABELOFFSET, 218 offsetof(struct vax_boot_block,bb_magic1)-LABELOFFSET); 219 220 /* point to bootblock at begining of bootstrap */ 221 bb = (struct vax_boot_block*)bootstrapbuf; 222 223 /* fill in the updated boot block fields */ 224 if (params->flags & IB_APPEND) { 225 struct stat filesyssb; 226 227 if (fstat(params->fsfd, &filesyssb) == -1) { 228 warn("Examining `%s'", params->filesystem); 229 goto done; 230 } 231 if (!S_ISREG(filesyssb.st_mode)) { 232 warnx( 233 "`%s' must be a regular file to append a bootstrap", 234 params->filesystem); 235 goto done; 236 } 237 startblock = howmany(filesyssb.st_size, 238 VAX_BOOT_BLOCK_BLOCKSIZE); 239 bb->bb_lbn_hi = htole16((uint16_t) (startblock >> 16)); 240 bb->bb_lbn_low = htole16((uint16_t) (startblock >> 0)); 241 } 242 243 if (params->flags & IB_SUNSUM) { 244 uint16_t sum; 245 246 sum = compute_sunsum((uint16_t *)bb); 247 if (! set_sunsum(params, (uint16_t *)bb, sum)) 248 goto done; 249 } 250 251 if (params->flags & IB_VERBOSE) { 252 printf("Bootstrap start sector: %u\n", startblock); 253 printf("Bootstrap sector count: %u\n", le32toh(bb->bb_size)); 254 printf("%sriting bootstrap\n", 255 (params->flags & IB_NOWRITE) ? "Not w" : "W"); 256 } 257 if (params->flags & IB_NOWRITE) { 258 retval = 1; 259 goto done; 260 } 261 rv = pwrite(params->fsfd, bootstrapbuf, bootstrapsize, 0); 262 if (rv == -1) { 263 warn("Writing `%s'", params->filesystem); 264 goto done; 265 } else if ((size_t)rv != bootstrapsize) { 266 warnx("Writing `%s': short write", params->filesystem); 267 goto done; 268 } 269 retval = 1; 270 271 done: 272 if (bootstrapbuf) 273 free(bootstrapbuf); 274 return (retval); 275 } 276 277 static int 278 load_bootstrap(ib_params *params, char **data, 279 uint32_t *loadaddr, uint32_t *execaddr, size_t *len) 280 { 281 ssize_t cc; 282 size_t buflen; 283 284 buflen = 512 * (VAX_BOOT_SIZE + 1); 285 *data = malloc(buflen); 286 if (*data == NULL) { 287 warn("Allocating %lu bytes", (unsigned long) buflen); 288 return (0); 289 } 290 291 cc = pread(params->s1fd, *data, buflen, 0); 292 if (cc <= 0) { 293 warn("Reading `%s'", params->stage1); 294 return (0); 295 } 296 if (cc > 512 * VAX_BOOT_SIZE) { 297 warnx("`%s': too large", params->stage1); 298 return (0); 299 } 300 301 *len = roundup(cc, VAX_BOOT_BLOCK_BLOCKSIZE); 302 *loadaddr = VAX_BOOT_LOAD; 303 *execaddr = VAX_BOOT_ENTRY; 304 return (1); 305 } 306
Indexes created Tue Sep 30 11:09:46 GMT 2025