pmax.c revision 1.4
1 /* $NetBSD: pmax.c,v 1.4 2002/04/19 07:08:54 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 1.4 2002/04/19 07:08:54 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 <string.h> 116 #include <unistd.h> 117 118 #include <sys/exec_elf.h> 119 #include <dev/dec/dec_boot.h> 120 121 #include "installboot.h" 122 123 static int load_bootstrap(ib_params *, char **, 124 uint32_t *, uint32_t *, size_t *); 125 126 127 int 128 pmax_parseopt(ib_params *params, const char *option) 129 { 130 131 if (parseoptionflag(params, option, IB_APPEND | IB_SUNSUM)) 132 return (1); 133 134 warnx("Unknown -o option `%s'", option); 135 return (0); 136 } 137 138 int 139 pmax_clearboot(ib_params *params) 140 { 141 struct pmax_boot_block bb; 142 ssize_t rv; 143 144 assert(params != NULL); 145 assert(params->fsfd != -1); 146 assert(params->filesystem != NULL); 147 assert(sizeof(struct pmax_boot_block) == PMAX_BOOT_BLOCK_BLOCKSIZE); 148 149 if (params->flags & (IB_STARTBLOCK | IB_APPEND)) { 150 warnx("Can't use `-b bno' or `-o append' with `-c'"); 151 return (0); 152 } 153 rv = pread(params->fsfd, &bb, sizeof(bb), PMAX_BOOT_BLOCK_OFFSET); 154 if (rv == -1) { 155 warn("Reading `%s'", params->filesystem); 156 return (0); 157 } else if (rv != sizeof(bb)) { 158 warnx("Reading `%s': short read", params->filesystem); 159 return (0); 160 } 161 162 if (le32toh(bb.magic) != PMAX_BOOT_MAGIC) { 163 warnx( 164 "Old boot block magic number invalid; boot block invalid"); 165 return (0); 166 } 167 168 bb.map[0].num_blocks = bb.map[0].start_block = bb.mode = 0; 169 bb.magic = htole32(PMAX_BOOT_MAGIC); 170 171 if (params->flags & IB_SUNSUM) { 172 uint16_t sum; 173 174 sum = compute_sunsum((uint16_t *)&bb); 175 if (! set_sunsum(params, (uint16_t *)&bb, sum)) 176 return (0); 177 } 178 179 if (params->flags & IB_VERBOSE) 180 printf("%slearing boot block\n", 181 (params->flags & IB_NOWRITE) ? "Not c" : "C"); 182 if (params->flags & IB_NOWRITE) 183 return (1); 184 185 rv = pwrite(params->fsfd, &bb, sizeof(bb), PMAX_BOOT_BLOCK_OFFSET); 186 if (rv == -1) { 187 warn("Writing `%s'", params->filesystem); 188 return (0); 189 } else if (rv != sizeof(bb)) { 190 warnx("Writing `%s': short write", params->filesystem); 191 return (0); 192 } 193 194 return (1); 195 } 196 197 int 198 pmax_setboot(ib_params *params) 199 { 200 struct stat bootstrapsb; 201 struct pmax_boot_block bb; 202 uint32_t startblock; 203 int retval; 204 char *bootstrapbuf; 205 size_t bootstrapsize; 206 uint32_t bootstrapload, bootstrapexec; 207 ssize_t rv; 208 209 assert(params != NULL); 210 assert(params->fsfd != -1); 211 assert(params->filesystem != NULL); 212 assert(params->s1fd != -1); 213 assert(params->stage1 != NULL); 214 assert(sizeof(struct pmax_boot_block) == PMAX_BOOT_BLOCK_BLOCKSIZE); 215 216 retval = 0; 217 bootstrapbuf = NULL; 218 219 if ((params->flags & IB_STARTBLOCK) && 220 (params->flags & IB_APPEND)) { 221 warnx("Can't use `-b bno' with `-o append'"); 222 goto done; 223 } 224 225 if (fstat(params->s1fd, &bootstrapsb) == -1) { 226 warn("Examining `%s'", params->stage1); 227 goto done; 228 } 229 if (!S_ISREG(bootstrapsb.st_mode)) { 230 warnx("`%s' must be a regular file", params->stage1); 231 goto done; 232 } 233 if (! load_bootstrap(params, &bootstrapbuf, &bootstrapload, 234 &bootstrapexec, &bootstrapsize)) 235 goto done; 236 237 rv = pread(params->fsfd, &bb, sizeof(bb), PMAX_BOOT_BLOCK_OFFSET); 238 if (rv == -1) { 239 warn("Reading `%s'", params->filesystem); 240 goto done; 241 } else if (rv != sizeof(bb)) { 242 warnx("Reading `%s': short read", params->filesystem); 243 goto done; 244 } 245 246 /* fill in the updated boot block fields */ 247 if (params->flags & IB_APPEND) { 248 struct stat filesyssb; 249 250 if (fstat(params->fsfd, &filesyssb) == -1) { 251 warn("Examining `%s'", params->filesystem); 252 goto done; 253 } 254 if (!S_ISREG(filesyssb.st_mode)) { 255 warnx( 256 "`%s' must be a regular file to append a bootstrap", 257 params->filesystem); 258 goto done; 259 } 260 startblock = howmany(filesyssb.st_size, 261 PMAX_BOOT_BLOCK_BLOCKSIZE); 262 } else if (params->flags & IB_STARTBLOCK) { 263 startblock = params->startblock; 264 } else { 265 startblock = PMAX_BOOT_BLOCK_OFFSET / PMAX_BOOT_BLOCK_BLOCKSIZE 266 + 1; 267 } 268 269 bb.map[0].start_block = htole32(startblock); 270 bb.map[0].num_blocks = 271 htole32(howmany(bootstrapsize, PMAX_BOOT_BLOCK_BLOCKSIZE)); 272 bb.magic = htole32(PMAX_BOOT_MAGIC); 273 bb.load_addr = htole32(bootstrapload); 274 bb.exec_addr = htole32(bootstrapexec); 275 bb.mode = htole32(PMAX_BOOTMODE_CONTIGUOUS); 276 277 if (params->flags & IB_SUNSUM) { 278 uint16_t sum; 279 280 sum = compute_sunsum((uint16_t *)&bb); 281 if (! set_sunsum(params, (uint16_t *)&bb, sum)) 282 goto done; 283 } 284 285 if (params->flags & IB_VERBOSE) { 286 printf("Bootstrap start sector: %#x\n", 287 le32toh(bb.map[0].start_block)); 288 printf("Bootstrap sector count: %#x\n", 289 le32toh(bb.map[0].num_blocks)); 290 printf("Bootstrap load address: %#x\n", 291 le32toh(bb.load_addr)); 292 printf("Bootstrap exec address: %#x\n", 293 le32toh(bb.exec_addr)); 294 printf("%sriting bootstrap\n", 295 (params->flags & IB_NOWRITE) ? "Not w" : "W"); 296 } 297 if (params->flags & IB_NOWRITE) { 298 retval = 1; 299 goto done; 300 } 301 rv = pwrite(params->fsfd, bootstrapbuf, bootstrapsize, 302 startblock * PMAX_BOOT_BLOCK_BLOCKSIZE); 303 if (rv == -1) { 304 warn("Writing `%s'", params->filesystem); 305 goto done; 306 } else if (rv != bootstrapsize) { 307 warnx("Writing `%s': short write", params->filesystem); 308 goto done; 309 } 310 311 if (params->flags & IB_VERBOSE) 312 printf("Writing boot block\n"); 313 rv = pwrite(params->fsfd, &bb, sizeof(bb), PMAX_BOOT_BLOCK_OFFSET); 314 if (rv == -1) { 315 warn("Writing `%s'", params->filesystem); 316 goto done; 317 } else if (rv != sizeof(bb)) { 318 warnx("Writing `%s': short write", params->filesystem); 319 goto done; 320 } else { 321 retval = 1; 322 } 323 324 done: 325 if (bootstrapbuf) 326 free(bootstrapbuf); 327 return (retval); 328 } 329 330 331 #define MAX_SEGMENTS 10 /* We can load up to 10 segments */ 332 333 struct seglist { 334 Elf32_Addr addr; 335 Elf32_Off f_offset; 336 Elf32_Word f_size; 337 }; 338 339 static int 340 load_bootstrap(ib_params *params, char **data, 341 uint32_t *loadaddr, uint32_t *execaddr, size_t *len) 342 { 343 int i, nsegs; 344 Elf32_Addr lowaddr, highaddr; 345 Elf32_Ehdr ehdr; 346 Elf32_Phdr phdr; 347 struct seglist seglist[MAX_SEGMENTS]; 348 349 if ((pread(params->s1fd, &ehdr, sizeof(ehdr), 0)) != sizeof(ehdr)) { 350 warn("Reading `%s'", params->stage1); 351 return (0); 352 } 353 if ((memcmp(ehdr.e_ident, ELFMAG, SELFMAG) != 0) || 354 (ehdr.e_ident[EI_CLASS] != ELFCLASS32)) { 355 warnx("No ELF header in `%s'", params->stage1); 356 return (0); 357 } 358 359 nsegs = highaddr = 0; 360 lowaddr = (uint32_t) ULONG_MAX; 361 362 for (i = 0; i < le16toh(ehdr.e_phnum); i++) { 363 if (pread(params->s1fd, &phdr, sizeof(phdr), 364 (off_t) le32toh(ehdr.e_phoff) + i * sizeof(phdr)) 365 != sizeof(phdr)) { 366 warn("Reading `%s'", params->stage1); 367 return (0); 368 } 369 if (le32toh(phdr.p_type) != PT_LOAD) 370 continue; 371 372 seglist[nsegs].addr = le32toh(phdr.p_paddr); 373 seglist[nsegs].f_offset = le32toh(phdr.p_offset); 374 seglist[nsegs].f_size = le32toh(phdr.p_filesz); 375 nsegs++; 376 377 if (le32toh(phdr.p_paddr) < lowaddr) 378 lowaddr = le32toh(phdr.p_paddr); 379 if (le32toh(phdr.p_paddr) + le32toh(phdr.p_filesz) > highaddr) 380 highaddr = le32toh(phdr.p_paddr) + 381 le32toh(phdr.p_filesz); 382 } 383 384 *loadaddr = lowaddr; 385 *execaddr = le32toh(ehdr.e_entry); 386 *len = roundup(highaddr - lowaddr, PMAX_BOOT_BLOCK_BLOCKSIZE); 387 if ((*data = malloc(*len)) == NULL) { 388 warn("Allocating %lu bytes", (unsigned long) *len); 389 return (0); 390 } 391 392 /* Now load the bootstrap into memory */ 393 for (i = 0; i < nsegs; i++) { 394 if (pread(params->s1fd, *data + seglist[i].addr - lowaddr, 395 seglist[i].f_size, (off_t)seglist[i].f_offset) 396 != seglist[i].f_size) { 397 warn("Reading `%s'", params->stage1); 398 return (0); 399 } 400 } 401 return (1); 402 } 403
Indexes created Tue Sep 23 01:09:51 GMT 2025