vax.c revision 1.19
1 /* $NetBSD: vax.c,v 1.19 2019/05/07 04:35:31 thorpej 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 1.19 2019/05/07 04:35:31 thorpej 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 #define VAX_LABELOFFSET 64 92 93 #ifndef __CTASSERT 94 #define __CTASSERT(X) 95 #endif 96 97 static int load_bootstrap(ib_params *, char **, 98 uint32_t *, uint32_t *, size_t *); 99 100 static int vax_clearboot(ib_params *); 101 static int vax_setboot(ib_params *); 102 103 struct ib_mach ib_mach_vax = { 104 .name = "vax", 105 .setboot = vax_setboot, 106 .clearboot = vax_clearboot, 107 .editboot = no_editboot, 108 .valid_flags = IB_STAGE1START | IB_APPEND | IB_SUNSUM, 109 }; 110 111 static int 112 vax_clearboot(ib_params *params) 113 { 114 struct vax_boot_block bb; 115 ssize_t rv; 116 117 assert(params != NULL); 118 assert(params->fsfd != -1); 119 assert(params->filesystem != NULL); 120 __CTASSERT(sizeof(bb)==VAX_BOOT_BLOCK_BLOCKSIZE); 121 122 rv = pread(params->fsfd, &bb, sizeof(bb), VAX_BOOT_BLOCK_OFFSET); 123 if (rv == -1) { 124 warn("Reading `%s'", params->filesystem); 125 return (0); 126 } else if (rv != sizeof(bb)) { 127 warnx("Reading `%s': short read", params->filesystem); 128 return (0); 129 } 130 131 if (bb.bb_id_offset*2 >= VAX_BOOT_BLOCK_BLOCKSIZE 132 || bb.bb_magic1 != VAX_BOOT_MAGIC1) { 133 warnx( 134 "Old boot block magic number invalid; boot block invalid"); 135 return (0); 136 } 137 138 bb.bb_id_offset = 1; 139 bb.bb_mbone = 0; 140 bb.bb_lbn_hi = 0; 141 bb.bb_lbn_low = 0; 142 143 if (params->flags & IB_SUNSUM) { 144 uint16_t sum; 145 146 sum = compute_sunsum((uint16_t *)&bb); 147 if (! set_sunsum(params, (uint16_t *)&bb, sum)) 148 return (0); 149 } 150 151 if (params->flags & IB_VERBOSE) 152 printf("%slearing boot block\n", 153 (params->flags & IB_NOWRITE) ? "Not c" : "C"); 154 if (params->flags & IB_NOWRITE) 155 return (1); 156 157 rv = pwrite(params->fsfd, &bb, sizeof(bb), VAX_BOOT_BLOCK_OFFSET); 158 if (rv == -1) { 159 warn("Writing `%s'", params->filesystem); 160 return (0); 161 } else if (rv != sizeof(bb)) { 162 warnx("Writing `%s': short write", params->filesystem); 163 return (0); 164 } 165 166 return (1); 167 } 168 169 static int 170 vax_setboot(ib_params *params) 171 { 172 struct stat bootstrapsb; 173 struct vax_boot_block *bb; 174 uint32_t startblock; 175 int retval; 176 char *bootstrapbuf, oldbb[VAX_BOOT_BLOCK_BLOCKSIZE]; 177 size_t bootstrapsize; 178 uint32_t bootstrapload, bootstrapexec; 179 ssize_t rv; 180 181 assert(params != NULL); 182 assert(params->fsfd != -1); 183 assert(params->filesystem != NULL); 184 assert(params->s1fd != -1); 185 assert(params->stage1 != NULL); 186 187 /* see sys/arch/vax/boot/xxboot/start.S for explanation */ 188 __CTASSERT(offsetof(struct vax_boot_block,bb_magic1) == 0x19e); 189 __CTASSERT(sizeof(struct vax_boot_block) == VAX_BOOT_BLOCK_BLOCKSIZE); 190 191 startblock = 0; 192 retval = 0; 193 bootstrapbuf = NULL; 194 195 if (fstat(params->s1fd, &bootstrapsb) == -1) { 196 warn("Examining `%s'", params->stage1); 197 goto done; 198 } 199 if (!S_ISREG(bootstrapsb.st_mode)) { 200 warnx("`%s' must be a regular file", params->stage1); 201 goto done; 202 } 203 if (! load_bootstrap(params, &bootstrapbuf, &bootstrapload, 204 &bootstrapexec, &bootstrapsize)) 205 goto done; 206 207 /* read old boot block */ 208 rv = pread(params->fsfd, oldbb, sizeof(oldbb), VAX_BOOT_BLOCK_OFFSET); 209 if (rv == -1) { 210 warn("Reading `%s'", params->filesystem); 211 goto done; 212 } else if (rv != sizeof(oldbb)) { 213 warnx("Reading `%s': short read", params->filesystem); 214 goto done; 215 } 216 217 /* 218 * Copy disklabel from old boot block to new. 219 * Assume everything between VAX_LABELOFFSET and the start of 220 * the param block is scratch area and can be copied over. 221 */ 222 memcpy(bootstrapbuf + VAX_LABELOFFSET, 223 oldbb + VAX_LABELOFFSET, 224 offsetof(struct vax_boot_block,bb_magic1) - VAX_LABELOFFSET); 225 226 /* point to bootblock at begining of bootstrap */ 227 bb = (struct vax_boot_block*)bootstrapbuf; 228 229 /* fill in the updated boot block fields */ 230 if (params->flags & IB_APPEND) { 231 struct stat filesyssb; 232 233 if (fstat(params->fsfd, &filesyssb) == -1) { 234 warn("Examining `%s'", params->filesystem); 235 goto done; 236 } 237 if (!S_ISREG(filesyssb.st_mode)) { 238 warnx( 239 "`%s' must be a regular file to append a bootstrap", 240 params->filesystem); 241 goto done; 242 } 243 startblock = howmany(filesyssb.st_size, 244 VAX_BOOT_BLOCK_BLOCKSIZE); 245 bb->bb_lbn_hi = htole16((uint16_t) (startblock >> 16)); 246 bb->bb_lbn_low = htole16((uint16_t) (startblock >> 0)); 247 } 248 249 if (params->flags & IB_SUNSUM) { 250 uint16_t sum; 251 252 sum = compute_sunsum((uint16_t *)bb); 253 if (! set_sunsum(params, (uint16_t *)bb, sum)) 254 goto done; 255 } 256 257 if (params->flags & IB_VERBOSE) { 258 printf("Bootstrap start sector: %u\n", startblock); 259 printf("Bootstrap sector count: %u\n", le32toh(bb->bb_size)); 260 printf("%sriting bootstrap\n", 261 (params->flags & IB_NOWRITE) ? "Not w" : "W"); 262 } 263 if (params->flags & IB_NOWRITE) { 264 retval = 1; 265 goto done; 266 } 267 rv = pwrite(params->fsfd, bootstrapbuf, bootstrapsize, 0); 268 if (rv == -1) { 269 warn("Writing `%s'", params->filesystem); 270 goto done; 271 } else if ((size_t)rv != bootstrapsize) { 272 warnx("Writing `%s': short write", params->filesystem); 273 goto done; 274 } 275 retval = 1; 276 277 done: 278 if (bootstrapbuf) 279 free(bootstrapbuf); 280 return (retval); 281 } 282 283 static int 284 load_bootstrap(ib_params *params, char **data, 285 uint32_t *loadaddr, uint32_t *execaddr, size_t *len) 286 { 287 ssize_t cc; 288 size_t buflen; 289 290 buflen = 512 * (VAX_BOOT_SIZE + 1); 291 *data = malloc(buflen); 292 if (*data == NULL) { 293 warn("Allocating %lu bytes", (unsigned long) buflen); 294 return (0); 295 } 296 297 cc = pread(params->s1fd, *data, buflen, 0); 298 if (cc <= 0) { 299 warn("Reading `%s'", params->stage1); 300 return (0); 301 } 302 if (cc > 512 * VAX_BOOT_SIZE) { 303 warnx("`%s': too large", params->stage1); 304 return (0); 305 } 306 307 *len = roundup(cc, VAX_BOOT_BLOCK_BLOCKSIZE); 308 *loadaddr = VAX_BOOT_LOAD; 309 *execaddr = VAX_BOOT_ENTRY; 310 return (1); 311 } 312
Indexes created Thu Sep 25 16:09:42 GMT 2025