pmax.c revision 1.3
1 /* $NetBSD: pmax.c,v 1.3 2002/04/12 06:50:41 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 1.3 2002/04/12 06:50:41 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 int pmax_parseopt(ib_params *, const char *); 124 int pmax_setboot(ib_params *); 125 int pmax_clearboot(ib_params *); 126 static int load_bootstrap(ib_params *, char **, 127 u_int32_t *, u_int32_t *, size_t *); 128 129 130 int 131 pmax_parseopt(ib_params *params, const char *option) 132 { 133 134 if (parseoptionflag(params, option, IB_APPEND | IB_SUNSUM)) 135 return (1); 136 137 warnx("Unknown -o option `%s'", option); 138 return (0); 139 } 140 141 int 142 pmax_clearboot(ib_params *params) 143 { 144 struct pmax_boot_block bb; 145 ssize_t rv; 146 147 assert(params != NULL); 148 assert(params->fsfd != -1); 149 assert(params->filesystem != NULL); 150 assert(sizeof(struct pmax_boot_block) == PMAX_BOOT_BLOCK_BLOCKSIZE); 151 152 if (params->flags & (IB_STARTBLOCK | IB_APPEND)) { 153 warnx("Can't use `-b bno' or `-o append' with `-c'"); 154 return (0); 155 } 156 rv = pread(params->fsfd, &bb, sizeof(bb), PMAX_BOOT_BLOCK_OFFSET); 157 if (rv == -1) { 158 warn("Reading `%s'", params->filesystem); 159 return (0); 160 } else if (rv != sizeof(bb)) { 161 warnx("Reading `%s': short read", params->filesystem); 162 return (0); 163 } 164 165 if (le32toh(bb.magic) != PMAX_BOOT_MAGIC) { 166 warnx( 167 "Old boot block magic number invalid; boot block invalid"); 168 return (0); 169 } 170 171 bb.map[0].num_blocks = bb.map[0].start_block = bb.mode = 0; 172 bb.magic = htole32(PMAX_BOOT_MAGIC); 173 174 if (params->flags & IB_SUNSUM) { 175 u_int16_t sum; 176 177 sum = compute_sunsum((u_int16_t *)&bb); 178 if (! set_sunsum(params, (u_int16_t *)&bb, sum)) 179 return (0); 180 } 181 182 if (params->flags & IB_VERBOSE) 183 printf("%slearing boot block\n", 184 (params->flags & IB_NOWRITE) ? "Not c" : "C"); 185 if (params->flags & IB_NOWRITE) 186 return (1); 187 188 rv = pwrite(params->fsfd, &bb, sizeof(bb), PMAX_BOOT_BLOCK_OFFSET); 189 if (rv == -1) { 190 warn("Writing `%s'", params->filesystem); 191 return (0); 192 } else if (rv != sizeof(bb)) { 193 warnx("Writing `%s': short write", params->filesystem); 194 return (0); 195 } 196 197 return (1); 198 } 199 200 int 201 pmax_setboot(ib_params *params) 202 { 203 struct stat bootstrapsb; 204 struct pmax_boot_block bb; 205 int startblock, retval; 206 char *bootstrapbuf; 207 size_t bootstrapsize; 208 u_int32_t bootstrapload, bootstrapexec; 209 ssize_t rv; 210 211 assert(params != NULL); 212 assert(params->fsfd != -1); 213 assert(params->filesystem != NULL); 214 assert(params->s1fd != -1); 215 assert(params->stage1 != NULL); 216 assert(sizeof(struct pmax_boot_block) == PMAX_BOOT_BLOCK_BLOCKSIZE); 217 218 retval = 0; 219 bootstrapbuf = NULL; 220 221 if ((params->flags & IB_STARTBLOCK) && 222 (params->flags & IB_APPEND)) { 223 warnx("Can't use `-b bno' with `-o append'"); 224 goto done; 225 } 226 227 if (fstat(params->s1fd, &bootstrapsb) == -1) { 228 warn("Examining `%s'", params->stage1); 229 goto done; 230 } 231 if (!S_ISREG(bootstrapsb.st_mode)) { 232 warnx("`%s' must be a regular file", params->stage1); 233 goto done; 234 } 235 if (! load_bootstrap(params, &bootstrapbuf, &bootstrapload, 236 &bootstrapexec, &bootstrapsize)) 237 goto done; 238 239 rv = pread(params->fsfd, &bb, sizeof(bb), PMAX_BOOT_BLOCK_OFFSET); 240 if (rv == -1) { 241 warn("Reading `%s'", params->filesystem); 242 goto done; 243 } else if (rv != sizeof(bb)) { 244 warnx("Reading `%s': short read", params->filesystem); 245 goto done; 246 } 247 248 /* fill in the updated boot block fields */ 249 if (params->flags & IB_APPEND) { 250 struct stat filesyssb; 251 252 if (fstat(params->fsfd, &filesyssb) == -1) { 253 warn("Examining `%s'", params->filesystem); 254 goto done; 255 } 256 if (!S_ISREG(filesyssb.st_mode)) { 257 warnx( 258 "`%s' must be a regular file to append a bootstrap", 259 params->filesystem); 260 goto done; 261 } 262 startblock = howmany(filesyssb.st_size, 263 PMAX_BOOT_BLOCK_BLOCKSIZE); 264 } else if (params->flags & IB_STARTBLOCK) { 265 startblock = params->startblock; 266 } else { 267 startblock = PMAX_BOOT_BLOCK_OFFSET / PMAX_BOOT_BLOCK_BLOCKSIZE 268 + 1; 269 } 270 271 bb.map[0].start_block = htole32(startblock); 272 bb.map[0].num_blocks = 273 htole32(howmany(bootstrapsize, PMAX_BOOT_BLOCK_BLOCKSIZE)); 274 bb.magic = htole32(PMAX_BOOT_MAGIC); 275 bb.load_addr = htole32(bootstrapload); 276 bb.exec_addr = htole32(bootstrapexec); 277 bb.mode = htole32(PMAX_BOOTMODE_CONTIGUOUS); 278 279 if (params->flags & IB_SUNSUM) { 280 u_int16_t sum; 281 282 sum = compute_sunsum((u_int16_t *)&bb); 283 if (! set_sunsum(params, (u_int16_t *)&bb, sum)) 284 goto done; 285 } 286 287 if (params->flags & IB_VERBOSE) { 288 printf("Bootstrap start sector: %#x\n", 289 le32toh(bb.map[0].start_block)); 290 printf("Bootstrap sector count: %#x\n", 291 le32toh(bb.map[0].num_blocks)); 292 printf("Bootstrap load address: %#x\n", 293 le32toh(bb.load_addr)); 294 printf("Bootstrap exec address: %#x\n", 295 le32toh(bb.exec_addr)); 296 printf("%sriting bootstrap\n", 297 (params->flags & IB_NOWRITE) ? "Not w" : "W"); 298 } 299 if (params->flags & IB_NOWRITE) { 300 retval = 1; 301 goto done; 302 } 303 rv = pwrite(params->fsfd, bootstrapbuf, bootstrapsize, 304 startblock * PMAX_BOOT_BLOCK_BLOCKSIZE); 305 if (rv == -1) { 306 warn("Writing `%s'", params->filesystem); 307 goto done; 308 } else if (rv != bootstrapsize) { 309 warnx("Writing `%s': short write", params->filesystem); 310 goto done; 311 } 312 313 if (params->flags & IB_VERBOSE) 314 printf("Writing boot block\n"); 315 rv = pwrite(params->fsfd, &bb, sizeof(bb), PMAX_BOOT_BLOCK_OFFSET); 316 if (rv == -1) { 317 warn("Writing `%s'", params->filesystem); 318 goto done; 319 } else if (rv != sizeof(bb)) { 320 warnx("Writing `%s': short write", params->filesystem); 321 goto done; 322 } else { 323 retval = 1; 324 } 325 326 done: 327 if (bootstrapbuf) 328 free(bootstrapbuf); 329 return (retval); 330 } 331 332 333 #define MAX_SEGMENTS 10 /* We can load up to 10 segments */ 334 335 struct seglist { 336 Elf32_Addr addr; 337 Elf32_Off f_offset; 338 Elf32_Word f_size; 339 }; 340 341 static int 342 load_bootstrap(ib_params *params, char **data, 343 u_int32_t *loadaddr, u_int32_t *execaddr, size_t *len) 344 { 345 int i, nsegs; 346 Elf32_Addr lowaddr, highaddr; 347 Elf32_Ehdr ehdr; 348 Elf32_Phdr phdr; 349 struct seglist seglist[MAX_SEGMENTS]; 350 351 if ((pread(params->s1fd, &ehdr, sizeof(ehdr), 0)) != sizeof(ehdr)) { 352 warn("Reading `%s'", params->stage1); 353 return (0); 354 } 355 if ((memcmp(ehdr.e_ident, ELFMAG, SELFMAG) != 0) || 356 (ehdr.e_ident[EI_CLASS] != ELFCLASS32)) { 357 warnx("No ELF header in `%s'", params->stage1); 358 return (0); 359 } 360 361 nsegs = highaddr = 0; 362 lowaddr = (u_int32_t) ULONG_MAX; 363 364 for (i = 0; i < le16toh(ehdr.e_phnum); i++) { 365 if (pread(params->s1fd, &phdr, sizeof(phdr), 366 (off_t) le32toh(ehdr.e_phoff) + i * sizeof(phdr)) 367 != sizeof(phdr)) { 368 warn("Reading `%s'", params->stage1); 369 return (0); 370 } 371 if (le32toh(phdr.p_type) != PT_LOAD) 372 continue; 373 374 seglist[nsegs].addr = le32toh(phdr.p_paddr); 375 seglist[nsegs].f_offset = le32toh(phdr.p_offset); 376 seglist[nsegs].f_size = le32toh(phdr.p_filesz); 377 nsegs++; 378 379 if (le32toh(phdr.p_paddr) < lowaddr) 380 lowaddr = le32toh(phdr.p_paddr); 381 if (le32toh(phdr.p_paddr) + le32toh(phdr.p_filesz) > highaddr) 382 highaddr = le32toh(phdr.p_paddr) + 383 le32toh(phdr.p_filesz); 384 } 385 386 *loadaddr = lowaddr; 387 *execaddr = le32toh(ehdr.e_entry); 388 *len = roundup(highaddr - lowaddr, PMAX_BOOT_BLOCK_BLOCKSIZE); 389 if ((*data = malloc(*len)) == NULL) { 390 warn("Allocating %lu bytes", (unsigned long) *len); 391 return (0); 392 } 393 394 /* Now load the bootstrap into memory */ 395 for (i = 0; i < nsegs; i++) { 396 if (pread(params->s1fd, *data + seglist[i].addr - lowaddr, 397 seglist[i].f_size, (off_t)seglist[i].f_offset) 398 != seglist[i].f_size) { 399 warn("Reading `%s'", params->stage1); 400 return (0); 401 } 402 } 403 return (1); 404 } 405
Indexes created Sun Sep 21 19:09:51 GMT 2025