pmax.c revision 1.1
1 /* $NetBSD: pmax.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 Ross Harvey. 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 Ross Harvey 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 /* 73 * Copyright (c) 1999 Christopher G. Demetriou. All rights reserved. 74 * 75 * Redistribution and use in source and binary forms, with or without 76 * modification, are permitted provided that the following conditions 77 * are met: 78 * 1. Redistributions of source code must retain the above copyright 79 * notice, this list of conditions and the following disclaimer. 80 * 2. Redistributions in binary form must reproduce the above copyright 81 * notice, this list of conditions and the following disclaimer in the 82 * documentation and/or other materials provided with the distribution. 83 * 3. All advertising materials mentioning features or use of this software 84 * must display the following acknowledgement: 85 * This product includes software developed by Christopher G. Demetriou 86 * for the NetBSD Project. 87 * 4. The name of the author may not be used to endorse or promote products 88 * derived from this software without specific prior written permission 89 * 90 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 91 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 92 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 93 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 94 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 95 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 96 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 97 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 98 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 99 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 100 */ 101 102 #include <sys/cdefs.h> 103 #if defined(__RCSID) && !defined(__lint) 104 __RCSID("$NetBSD: pmax.c,v 1.1 2002/04/03 09:09:04 lukem Exp $"); 105 #endif /* !__lint */ 106 107 #include <sys/param.h> 108 #include <sys/stat.h> 109 110 #include <assert.h> 111 #include <err.h> 112 #include <stddef.h> 113 #include <stdio.h> 114 #include <stdlib.h> 115 #include <unistd.h> 116 117 #include <sys/exec_elf.h> 118 #include <dev/dec/dec_boot.h> 119 120 #include "installboot.h" 121 122 int pmax_parseopt(ib_params *, const char *); 123 int pmax_setboot(ib_params *); 124 int pmax_clearboot(ib_params *); 125 static int load_bootstrap(ib_params *, char **, 126 u_int32_t *, u_int32_t *, size_t *); 127 128 129 int 130 pmax_parseopt(ib_params *params, const char *option) 131 { 132 133 if (parseoptionflag(params, option, IB_APPEND | IB_SUNSUM)) 134 return (1); 135 136 warnx("Unknown -o option `%s'", option); 137 return (0); 138 } 139 140 int 141 pmax_clearboot(ib_params *params) 142 { 143 struct pmax_boot_block bb; 144 ssize_t rv; 145 146 assert(params != NULL); 147 assert(params->fsfd != -1); 148 assert(params->filesystem != NULL); 149 assert(sizeof(struct pmax_boot_block) == PMAX_BOOT_BLOCK_BLOCKSIZE); 150 151 if (params->flags & (IB_STARTBLOCK | IB_APPEND)) { 152 warnx("Can't use `-b bno' or `-o append' with `-c'"); 153 return (0); 154 } 155 rv = pread(params->fsfd, &bb, sizeof(bb), PMAX_BOOT_BLOCK_OFFSET); 156 if (rv == -1) { 157 warn("Reading `%s'", params->filesystem); 158 return (0); 159 } else if (rv != sizeof(bb)) { 160 warnx("Reading `%s': short read", params->filesystem); 161 return (0); 162 } 163 164 if (le32toh(bb.magic) != PMAX_BOOT_MAGIC) { 165 warnx( 166 "Old boot block magic number invalid; boot block invalid"); 167 return (0); 168 } 169 170 bb.map[0].num_blocks = bb.map[0].start_block = bb.mode = 0; 171 bb.magic = htole32(PMAX_BOOT_MAGIC); 172 173 if (params->flags & IB_SUNSUM) { 174 u_int16_t sum; 175 176 sum = compute_sunsum((u_int16_t *)&bb); 177 if (! set_sunsum(params, (u_int16_t *)&bb, sum)) 178 return (0); 179 } 180 181 if (params->flags & IB_VERBOSE) 182 printf("%slearing boot block\n", 183 (params->flags & IB_NOWRITE) ? "Not c" : "C"); 184 if (params->flags & IB_NOWRITE) 185 return (1); 186 187 rv = pwrite(params->fsfd, &bb, sizeof(bb), PMAX_BOOT_BLOCK_OFFSET); 188 if (rv == -1) { 189 warn("Writing `%s'", params->filesystem); 190 return (0); 191 } else if (rv != sizeof(bb)) { 192 warnx("Writing `%s': short write", params->filesystem); 193 return (0); 194 } 195 196 return (1); 197 } 198 199 int 200 pmax_setboot(ib_params *params) 201 { 202 struct stat bootstrapsb; 203 struct pmax_boot_block bb; 204 int startblock, retval; 205 char *bootstrapbuf; 206 size_t bootstrapsize; 207 u_int32_t bootstrapload, bootstrapexec; 208 ssize_t rv; 209 210 assert(params != NULL); 211 assert(params->fsfd != -1); 212 assert(params->filesystem != NULL); 213 assert(params->bbfd != -1); 214 assert(params->bootblock != NULL); 215 assert(sizeof(struct pmax_boot_block) == PMAX_BOOT_BLOCK_BLOCKSIZE); 216 217 retval = 0; 218 bootstrapbuf = NULL; 219 220 if ((params->flags & IB_STARTBLOCK) && 221 (params->flags & IB_APPEND)) { 222 warnx("Can't use `-b bno' with `-o append'"); 223 goto done; 224 } 225 226 if (fstat(params->bbfd, &bootstrapsb) == -1) { 227 warn("Examining `%s'", params->bootblock); 228 goto done; 229 } 230 if (!S_ISREG(bootstrapsb.st_mode)) { 231 warnx("`%s' must be a regular file", params->bootblock); 232 goto done; 233 } 234 if (! load_bootstrap(params, &bootstrapbuf, &bootstrapload, 235 &bootstrapexec, &bootstrapsize)) 236 goto done; 237 238 rv = pread(params->fsfd, &bb, sizeof(bb), PMAX_BOOT_BLOCK_OFFSET); 239 if (rv == -1) { 240 warn("Reading `%s'", params->filesystem); 241 goto done; 242 } else if (rv != sizeof(bb)) { 243 warnx("Reading `%s': short read", params->filesystem); 244 goto done; 245 } 246 247 /* fill in the updated boot block fields */ 248 if (params->flags & IB_APPEND) { 249 struct stat filesyssb; 250 251 if (fstat(params->fsfd, &filesyssb) == -1) { 252 warn("Examining `%s'", params->filesystem); 253 goto done; 254 } 255 if (!S_ISREG(filesyssb.st_mode)) { 256 warnx( 257 "`%s' must be a regular file to append a boot block", 258 params->filesystem); 259 goto done; 260 } 261 startblock = howmany(filesyssb.st_size, 262 PMAX_BOOT_BLOCK_BLOCKSIZE); 263 } else if (params->flags & IB_STARTBLOCK) { 264 startblock = params->startblock; 265 } else { 266 startblock = PMAX_BOOT_BLOCK_OFFSET / PMAX_BOOT_BLOCK_BLOCKSIZE 267 + 1; 268 } 269 270 bb.map[0].start_block = htole32(startblock); 271 bb.map[0].num_blocks = 272 htole32(howmany(bootstrapsize, PMAX_BOOT_BLOCK_BLOCKSIZE)); 273 bb.magic = htole32(PMAX_BOOT_MAGIC); 274 bb.load_addr = htole32(bootstrapload); 275 bb.exec_addr = htole32(bootstrapexec); 276 bb.mode = htole32(PMAX_BOOTMODE_CONTIGUOUS); 277 278 if (params->flags & IB_SUNSUM) { 279 u_int16_t sum; 280 281 sum = compute_sunsum((u_int16_t *)&bb); 282 if (! set_sunsum(params, (u_int16_t *)&bb, sum)) 283 goto done; 284 } 285 286 if (params->flags & IB_VERBOSE) { 287 printf("Bootstrap start sector: %#x\n", 288 le32toh(bb.map[0].start_block)); 289 printf("Bootstrap sector count: %#x\n", 290 le32toh(bb.map[0].num_blocks)); 291 printf("Bootstrap load address: %#x\n", 292 le32toh(bb.load_addr)); 293 printf("Bootstrap exec address: %#x\n", 294 le32toh(bb.exec_addr)); 295 printf("%sriting bootstrap\n", 296 (params->flags & IB_NOWRITE) ? "Not w" : "W"); 297 } 298 if (params->flags & IB_NOWRITE) { 299 retval = 1; 300 goto done; 301 } 302 rv = pwrite(params->fsfd, bootstrapbuf, bootstrapsize, 303 startblock * PMAX_BOOT_BLOCK_BLOCKSIZE); 304 if (rv == -1) { 305 warn("Writing `%s'", params->filesystem); 306 goto done; 307 } else if (rv != bootstrapsize) { 308 warnx("Writing `%s': short write", params->filesystem); 309 goto done; 310 } 311 312 if (params->flags & IB_VERBOSE) 313 printf("Writing boot block\n"); 314 rv = pwrite(params->fsfd, &bb, sizeof(bb), PMAX_BOOT_BLOCK_OFFSET); 315 if (rv == -1) { 316 warn("Writing `%s'", params->filesystem); 317 goto done; 318 } else if (rv != sizeof(bb)) { 319 warnx("Writing `%s': short write", params->filesystem); 320 goto done; 321 } else { 322 retval = 1; 323 } 324 325 done: 326 if (bootstrapbuf) 327 free(bootstrapbuf); 328 return (retval); 329 } 330 331 332 #define MAX_SEGMENTS 10 /* We can load up to 10 segments */ 333 334 struct seglist { 335 Elf32_Addr addr; 336 Elf32_Off f_offset; 337 Elf32_Word f_size; 338 }; 339 340 static int 341 load_bootstrap(ib_params *params, char **data, 342 u_int32_t *loadaddr, u_int32_t *execaddr, size_t *len) 343 { 344 int i, nsegs; 345 Elf32_Addr lowaddr, highaddr; 346 Elf32_Ehdr ehdr; 347 Elf32_Phdr phdr; 348 struct seglist seglist[MAX_SEGMENTS]; 349 350 if ((pread(params->bbfd, &ehdr, sizeof(ehdr), 0)) != sizeof(ehdr)) { 351 warn("Reading `%s'", params->bootblock); 352 return (0); 353 } 354 if ((memcmp(ehdr.e_ident, ELFMAG, SELFMAG) != 0) || 355 (ehdr.e_ident[EI_CLASS] != ELFCLASS32)) { 356 warnx("No ELF header in `%s'", params->bootblock); 357 return (0); 358 } 359 360 nsegs = highaddr = 0; 361 lowaddr = (u_int32_t) ULONG_MAX; 362 363 for (i = 0; i < le16toh(ehdr.e_phnum); i++) { 364 if (pread(params->bbfd, &phdr, sizeof(phdr), 365 (off_t) le32toh(ehdr.e_phoff) + i * sizeof(phdr)) 366 != sizeof(phdr)) { 367 warn("Reading `%s'", params->bootblock); 368 return (0); 369 } 370 if (le32toh(phdr.p_type) != PT_LOAD) 371 continue; 372 373 seglist[nsegs].addr = le32toh(phdr.p_paddr); 374 seglist[nsegs].f_offset = le32toh(phdr.p_offset); 375 seglist[nsegs].f_size = le32toh(phdr.p_filesz); 376 nsegs++; 377 378 if (le32toh(phdr.p_paddr) < lowaddr) 379 lowaddr = le32toh(phdr.p_paddr); 380 if (le32toh(phdr.p_paddr) + le32toh(phdr.p_filesz) > highaddr) 381 highaddr = le32toh(phdr.p_paddr) + 382 le32toh(phdr.p_filesz); 383 } 384 385 *loadaddr = lowaddr; 386 *execaddr = le32toh(ehdr.e_entry); 387 *len = roundup(highaddr - lowaddr, PMAX_BOOT_BLOCK_BLOCKSIZE); 388 if ((*data = malloc(*len)) == NULL) { 389 warn("Allocating %lu bytes", (unsigned long) *len); 390 return (0); 391 } 392 393 /* Now load the bootstrap into memory */ 394 for (i = 0; i < nsegs; i++) { 395 if (pread(params->bbfd, *data + seglist[i].addr - lowaddr, 396 seglist[i].f_size, (off_t)seglist[i].f_offset) 397 != seglist[i].f_size) { 398 warn("Reading `%s'", params->bootblock); 399 return (0); 400 } 401 } 402 return (1); 403 } 404
Indexes created Mon Sep 22 05:09:51 GMT 2025