mkboot.c revision 1.1
1 /* $NetBSD: mkboot.c,v 1.1 2014/02/24 07:23:43 skrll Exp $ */ 2 3 /* $OpenBSD: mkboot.c,v 1.9 2001/05/17 00:57:55 pvalchev Exp $ */ 4 5 /* 6 * Copyright (c) 1990, 1993 7 * The Regents of the University of California. All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)mkboot.c 8.1 (Berkeley) 7/15/93 34 */ 35 36 #if 0 37 #ifndef lint 38 static char copyright[] = 39 "@(#) Copyright (c) 1990, 1993\n\ 40 The Regents of the University of California. All rights reserved.\n"; 41 #endif /* not lint */ 42 43 #ifndef lint 44 static char rcsid[] = "$OpenBSD: mkboot.c,v 1.9 2001/05/17 00:57:55 pvalchev Exp $"; 45 #endif /* not lint */ 46 #endif 47 48 #if HAVE_NBTOOL_CONFIG_H 49 #include "nbtool_config.h" 50 #include "../../sys/sys/bootblock.h" 51 #else 52 #include <sys/bootblock.h> 53 #endif 54 55 #include <sys/param.h> 56 #include <sys/file.h> 57 #include <sys/stat.h> 58 #include <string.h> 59 #include <stdlib.h> 60 #include <unistd.h> 61 #include <time.h> 62 #include <err.h> 63 64 /* BFD ELF headers */ 65 #include <elf/common.h> 66 #include <elf/external.h> 67 68 #define IS_ELF(ehdr) ((ehdr).e_ident[EI_MAG0] == ELFMAG0 && \ 69 (ehdr).e_ident[EI_MAG1] == ELFMAG1 && \ 70 (ehdr).e_ident[EI_MAG2] == ELFMAG2 && \ 71 (ehdr).e_ident[EI_MAG3] == ELFMAG3) 72 73 /* 74 * Macros to get values from multi-byte ELF header fields. These assume 75 * a big-endian image. 76 */ 77 #define ELFGET16(x) (((x)[0] << 8) | (x)[1]) 78 79 #define ELFGET32(x) (((x)[0] << 24) | ((x)[1] << 16) | \ 80 ((x)[2] << 8) | (x)[3]) 81 82 /* 83 * Header prepended to each a.out file. 84 */ 85 struct exec { 86 u_long a_midmag; /* htonl(flags<<26 | mid<<16 | magic) */ 87 u_long a_text; /* text segment size */ 88 u_long a_data; /* initialized data size */ 89 u_long a_bss; /* uninitialized data size */ 90 u_long a_syms; /* symbol table size */ 91 u_long a_entry; /* entry point */ 92 u_long a_trsize; /* text relocation size */ 93 u_long a_drsize; /* data relocation size */ 94 }; 95 96 /* a_magic */ 97 #define OMAGIC 0407 /* old impure format */ 98 #define NMAGIC 0410 /* read-only text */ 99 #define ZMAGIC 0413 /* demand load format */ 100 #define QMAGIC 0314 /* "compact" demand load format; deprecated */ 101 102 #define N_GETMAGIC(ex) \ 103 ((((ex).a_midmag)&0xffff0000) ? \ 104 (ntohl((uint32_t)((ex).a_midmag))&0xffff) : ((ex).a_midmag)) 105 106 #include <stdio.h> 107 #include <ctype.h> 108 109 int putfile(char *, int); 110 void __dead usage(void); 111 void bcddate(char *, char *); 112 char *lifname(char *); 113 int cksum(int, int *, int); 114 115 char *to_file; 116 int loadpoint, verbose; 117 u_long entry; 118 119 /* 120 * Old Format: 121 * sector 0: LIF volume header (40 bytes) 122 * sector 1: <unused> 123 * sector 2: LIF directory (8 x 32 == 256 bytes) 124 * sector 3-: LIF file 0, LIF file 1, etc. 125 * where sectors are 256 bytes. 126 * 127 * New Format: 128 * sector 0: LIF volume header (40 bytes) 129 * sector 1: <unused> 130 * sector 2: LIF directory (8 x 32 == 256 bytes) 131 * sector 3: <unused> 132 * sector 4-31: disklabel (~300 bytes right now) 133 * sector 32-: LIF file 0, LIF file 1, etc. 134 */ 135 int 136 main(int argc, char **argv) 137 { 138 int to, n, pos, c; 139 char buf[HPPA_LIF_FILESTART]; 140 struct hppa_lifvol *lifv = (struct hppa_lifvol *)buf; 141 struct hppa_lifdir *lifd = (struct hppa_lifdir *)(buf + HPPA_LIF_DIRSTART); 142 143 while ((c = getopt(argc, argv, "vl:")) != -1) { 144 switch (c) { 145 case 'v': 146 verbose++; 147 break; 148 case 'l': 149 sscanf(optarg, "0x%x", &loadpoint); 150 break; 151 default: 152 usage(); 153 } 154 } 155 if (argc - optind < 2) 156 usage(); 157 else if (argc - optind > 8) 158 errx(1, "too many boot programs (max 8 supported)"); 159 160 to_file = argv[--argc]; 161 if ((to = open(to_file, O_RDWR | O_TRUNC | O_CREAT, 0644)) < 0) 162 err(1, "%s: open", to_file); 163 164 memset(buf, 0, sizeof(buf)); 165 166 /* record volume info */ 167 lifv->vol_id = htobe16(HPPA_LIF_VOL_ID); 168 strncpy(lifv->vol_label, "MKBOOT", 6); 169 lifv->vol_addr = htobe32(hppa_btolifs(HPPA_LIF_DIRSTART)); 170 lifv->vol_oct = htobe16(HPPA_LIF_VOL_OCT); 171 lifv->vol_dirsize = htobe32(hppa_btolifs(HPPA_LIF_DIRSIZE)); 172 lifv->vol_version = htobe16(1); 173 lifv->vol_number = htobe32(1); 174 lifv->vol_lastvol = htobe32(1); 175 lifv->vol_length = HPPA_LIF_FILESTART; /* ... so far. */ 176 bcddate(to_file, lifv->vol_toc); 177 lifv->ipl_addr = htobe32(HPPA_LIF_FILESTART); 178 179 argv += optind; 180 argc -= optind; 181 optind = 0; 182 for (pos = HPPA_LIF_FILESTART; optind < argc; optind++) { 183 184 /* output bootfile */ 185 if (lseek(to, pos, SEEK_SET) < 0) 186 err(1, "%s: lseek", to_file); 187 lifd[optind].dir_addr = htobe32(hppa_btolifs(pos)); 188 n = hppa_btolifs(putfile(argv[optind], to)); 189 if (lifv->ipl_entry == 0) { 190 lifv->ipl_entry = htobe32(loadpoint + entry); 191 lifv->ipl_size = htobe32(hppa_lifstob(n)); 192 lifd[optind].dir_type = htobe16(HPPA_LIF_DIR_ISL); 193 lifd[optind].dir_implement = 0; 194 } else { 195 lifd[optind].dir_type = htobe16(HPPA_LIF_DIR_TYPE); 196 lifd[optind].dir_implement = htobe32(loadpoint + entry); 197 } 198 199 memcpy(lifd[optind].dir_name, lifname(argv[optind]), 200 sizeof(lifd[optind].dir_name)); 201 lifd[optind].dir_length = htobe32(n); 202 bcddate(argv[optind], lifd[optind].dir_toc); 203 lifd[optind].dir_flag = htobe16(HPPA_LIF_DIR_FLAG); 204 205 lifv->vol_length += n; 206 pos += hppa_lifstob(n); 207 } 208 209 /* terminate the directory */ 210 lifd[optind].dir_type = htobe16(0xffff); 211 212 /* byte-swap the length now that we're done computing it */ 213 lifv->vol_length = htobe32(lifv->vol_length); 214 215 /* output volume/directory header info */ 216 if (lseek(to, HPPA_LIF_VOLSTART, SEEK_SET) < 0) 217 err(1, "%s: lseek", to_file); 218 if (write(to, buf, sizeof(buf)) != sizeof(buf)) 219 err(1, "%s: write LIF volume", to_file); 220 lseek(to, 0, SEEK_END); 221 222 if (close(to) < 0) 223 err(1, "%s", to_file); 224 225 return(0); 226 } 227 228 int 229 putfile(char *from_file, int to) 230 { 231 struct exec ex; 232 char buf[2048]; 233 int n, total; 234 int from, check_sum = 0; 235 struct hppa_lifload load; 236 Elf32_External_Ehdr elf_header; 237 Elf32_External_Phdr *elf_segments; 238 int i, header_count, memory_needed, elf_load_image_segment; 239 240 if ((from = open(from_file, O_RDONLY)) < 0) 241 err(1, "%s", from_file); 242 243 n = read(from, &ex, sizeof(ex)); 244 if (n != sizeof(ex)) 245 err(1, "%s: reading file header", from_file); 246 247 entry = ex.a_entry; 248 if (N_GETMAGIC(ex) == OMAGIC || N_GETMAGIC(ex) == NMAGIC) 249 entry += sizeof(ex); 250 else if (IS_ELF(*(Elf32_External_Ehdr *)&ex)) { 251 252 if (lseek(from, 0, SEEK_SET) < 0) 253 err(1, "lseek"); 254 n = read(from, &elf_header, sizeof (elf_header)); 255 if (n != sizeof (elf_header)) 256 err(1, "%s: reading ELF header", from_file); 257 header_count = ELFGET16(elf_header.e_phnum); 258 memory_needed = header_count * sizeof (Elf32_External_Phdr); 259 elf_segments = malloc(memory_needed); 260 if (elf_segments == NULL) 261 err(1, "malloc"); 262 if (lseek(from, ELFGET32(elf_header.e_phoff), SEEK_SET) < 0) 263 err(1, "lseek"); 264 n = read(from, elf_segments, memory_needed); 265 if (n != memory_needed) 266 err(1, "%s: reading ELF segments", from_file); 267 elf_load_image_segment = -1; 268 for (i = 0; i < header_count; i++) { 269 if (ELFGET32(elf_segments[i].p_filesz) && 270 ELFGET32(elf_segments[i].p_flags) & PF_X) { 271 if (elf_load_image_segment != -1) 272 errx(1, "%s: more than one ELF program " 273 "segment", from_file); 274 elf_load_image_segment = i; 275 } 276 } 277 if (elf_load_image_segment == -1) 278 errx(1, "%s: no suitable ELF program segment", 279 from_file); 280 entry = ELFGET32(elf_header.e_entry) + 281 ELFGET32(elf_segments[elf_load_image_segment].p_offset) - 282 ELFGET32(elf_segments[elf_load_image_segment].p_vaddr); 283 } else if (*(uint8_t *)&ex == 0x1f && ((uint8_t *)&ex)[1] == 0x8b) { 284 entry = 0; 285 } else 286 errx(1, "%s: bad magic number", from_file); 287 288 entry += sizeof(load); 289 lseek(to, sizeof(load), SEEK_CUR); 290 291 total = 0; 292 n = sizeof(buf) - sizeof(load); 293 /* copy the whole file */ 294 for (lseek(from, 0, SEEK_SET); ; n = sizeof(buf)) { 295 memset(buf, 0, sizeof(buf)); 296 if ((n = read(from, buf, n)) < 0) 297 err(1, "%s", from_file); 298 else if (n == 0) 299 break; 300 301 if (write(to, buf, n) != n) 302 err(1, "%s", to_file); 303 304 total += n; 305 check_sum = cksum(check_sum, (int *)buf, n); 306 } 307 308 /* load header */ 309 load.address = htobe32(loadpoint + sizeof(load)); 310 load.count = htobe32(4 + total); 311 check_sum = cksum(check_sum, (int *)&load, sizeof(load)); 312 313 if (verbose) 314 warnx("wrote %d bytes of file \'%s\'", total, from_file); 315 316 total += sizeof(load); 317 /* insert the header */ 318 lseek(to, -total, SEEK_CUR); 319 if (write(to, &load, sizeof(load)) != sizeof(load)) 320 err(1, "%s", to_file); 321 lseek(to, total - sizeof(load), SEEK_CUR); 322 323 memset(buf, 0, sizeof(buf)); 324 /* pad to int */ 325 n = sizeof(int) - total % sizeof(int); 326 if (total % sizeof(int)) { 327 if (write(to, buf, n) != n) 328 err(1, "%s", to_file); 329 else 330 total += n; 331 } 332 333 /* pad to the blocksize */ 334 n = sizeof(buf) - total % sizeof(buf); 335 336 if (n < sizeof(int)) { 337 n += sizeof(buf); 338 total += sizeof(buf); 339 } else 340 total += n; 341 342 /* TODO should pad here to the 65k boundary for tape boot */ 343 344 if (verbose) 345 warnx("checksum is 0x%08x", -check_sum); 346 347 check_sum = htobe32(-check_sum); 348 if (write(to, &check_sum, sizeof(int)) != sizeof(int)) 349 err(1, "%s", to_file); 350 351 n -= sizeof(int); 352 353 if (write(to, buf, n) != n) 354 err(1, "%s", to_file); 355 356 if (close(from) < 0) 357 err(1, "%s", from_file); 358 359 return total; 360 } 361 362 int 363 cksum(int ck, int *p, int size) 364 { 365 /* we assume size is int-aligned */ 366 for (size = (size + sizeof(int) - 1) / sizeof(int); size--; p++ ) 367 ck += be32toh(*p); 368 369 return ck; 370 } 371 372 void __dead 373 usage(void) 374 { 375 fprintf(stderr, 376 "usage: %s [-v] [-l loadpoint] prog1 {progN} outfile\n", 377 getprogname()); 378 exit(1); 379 } 380 381 char * 382 lifname(char *str) 383 { 384 static char lname[10] = "XXXXXXXXXX"; 385 char *cp; 386 int i; 387 388 cp = strrchr(str, '/'); 389 if (cp != NULL) { 390 str = cp + 1; 391 } 392 for (i = 0; i < 9; i++) { 393 if (islower(*str)) 394 lname[i] = toupper(*str); 395 else if (isalnum(*str) || *str == '_') 396 lname[i] = *str; 397 else 398 break; 399 str++; 400 } 401 for ( ; i < 10; i++) 402 lname[i] = ' '; 403 return(lname); 404 } 405 406 407 void 408 bcddate(char *file, char *toc) 409 { 410 struct stat statb; 411 struct tm *tm; 412 413 stat(file, &statb); 414 tm = localtime(&statb.st_ctime); 415 tm->tm_year %= 100; 416 *toc = (tm->tm_year / 10) << 4; 417 *toc++ |= tm->tm_year % 10; 418 *toc = ((tm->tm_mon+1) / 10) << 4; 419 *toc++ |= (tm->tm_mon+1) % 10; 420 *toc = (tm->tm_mday / 10) << 4; 421 *toc++ |= tm->tm_mday % 10; 422 *toc = (tm->tm_hour / 10) << 4; 423 *toc++ |= tm->tm_hour % 10; 424 *toc = (tm->tm_min / 10) << 4; 425 *toc++ |= tm->tm_min % 10; 426 *toc = (tm->tm_sec / 10) << 4; 427 *toc |= tm->tm_sec % 10; 428 } 429
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