tools/firmware-utils/src/imagetag.c

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General Public
   3  * License.  See the file "COPYING" in the main directory of this archive
   4  * for more details.
   5  *
   6  * Copyright (C) 2008 Axel Gembe <ago@bastart.eu.org>
   7  * Copyright (C) 2009-2010 Daniel Dickinson <openwrt@cshore.neomailbox.net>
   8  */
   9
  10 #include <stdio.h>
  11 #include <stdlib.h>
  12 #include <string.h>
  13 #include <stdint.h>
  14 #include <time.h>
  15 #include <unistd.h>
  16 #include <sys/stat.h>
  17 #include <netinet/in.h>
  18
  19 #include "bcm_tag.h"
  20 #include "imagetag_cmdline.h"
  21
  22 #define DEADCODE                        0xDEADC0DE
  23
  24 /* Kernel header */
  25 struct kernelhdr {
  26         uint32_t                loadaddr;       /* Kernel load address */
  27         uint32_t                entry;          /* Kernel entry point address */
  28         uint32_t                lzmalen;        /* Compressed length of the LZMA data that follows */
  29 };
  30
  31 static char pirellitab[NUM_PIRELLI][BOARDID_LEN] = PIRELLI_BOARDS;
  32
  33 static uint32_t crc32tab[256] = {
  34         0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA, 0x076DC419, 0x706AF48F, 0xE963A535, 0x9E6495A3,
  35         0x0EDB8832, 0x79DCB8A4, 0xE0D5E91E, 0x97D2D988, 0x09B64C2B, 0x7EB17CBD, 0xE7B82D07, 0x90BF1D91,
  36         0x1DB71064, 0x6AB020F2, 0xF3B97148, 0x84BE41DE, 0x1ADAD47D, 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7,
  37         0x136C9856, 0x646BA8C0, 0xFD62F97A, 0x8A65C9EC, 0x14015C4F, 0x63066CD9, 0xFA0F3D63, 0x8D080DF5,
  38         0x3B6E20C8, 0x4C69105E, 0xD56041E4, 0xA2677172, 0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B,
  39         0x35B5A8FA, 0x42B2986C, 0xDBBBC9D6, 0xACBCF940, 0x32D86CE3, 0x45DF5C75, 0xDCD60DCF, 0xABD13D59,
  40         0x26D930AC, 0x51DE003A, 0xC8D75180, 0xBFD06116, 0x21B4F4B5, 0x56B3C423, 0xCFBA9599, 0xB8BDA50F,
  41         0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924, 0x2F6F7C87, 0x58684C11, 0xC1611DAB, 0xB6662D3D,
  42         0x76DC4190, 0x01DB7106, 0x98D220BC, 0xEFD5102A, 0x71B18589, 0x06B6B51F, 0x9FBFE4A5, 0xE8B8D433,
  43         0x7807C9A2, 0x0F00F934, 0x9609A88E, 0xE10E9818, 0x7F6A0DBB, 0x086D3D2D, 0x91646C97, 0xE6635C01,
  44         0x6B6B51F4, 0x1C6C6162, 0x856530D8, 0xF262004E, 0x6C0695ED, 0x1B01A57B, 0x8208F4C1, 0xF50FC457,
  45         0x65B0D9C6, 0x12B7E950, 0x8BBEB8EA, 0xFCB9887C, 0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3, 0xFBD44C65,
  46         0x4DB26158, 0x3AB551CE, 0xA3BC0074, 0xD4BB30E2, 0x4ADFA541, 0x3DD895D7, 0xA4D1C46D, 0xD3D6F4FB,
  47         0x4369E96A, 0x346ED9FC, 0xAD678846, 0xDA60B8D0, 0x44042D73, 0x33031DE5, 0xAA0A4C5F, 0xDD0D7CC9,
  48         0x5005713C, 0x270241AA, 0xBE0B1010, 0xC90C2086, 0x5768B525, 0x206F85B3, 0xB966D409, 0xCE61E49F,
  49         0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4, 0x59B33D17, 0x2EB40D81, 0xB7BD5C3B, 0xC0BA6CAD,
  50         0xEDB88320, 0x9ABFB3B6, 0x03B6E20C, 0x74B1D29A, 0xEAD54739, 0x9DD277AF, 0x04DB2615, 0x73DC1683,
  51         0xE3630B12, 0x94643B84, 0x0D6D6A3E, 0x7A6A5AA8, 0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1,
  52         0xF00F9344, 0x8708A3D2, 0x1E01F268, 0x6906C2FE, 0xF762575D, 0x806567CB, 0x196C3671, 0x6E6B06E7,
  53         0xFED41B76, 0x89D32BE0, 0x10DA7A5A, 0x67DD4ACC, 0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5,
  54         0xD6D6A3E8, 0xA1D1937E, 0x38D8C2C4, 0x4FDFF252, 0xD1BB67F1, 0xA6BC5767, 0x3FB506DD, 0x48B2364B,
  55         0xD80D2BDA, 0xAF0A1B4C, 0x36034AF6, 0x41047A60, 0xDF60EFC3, 0xA867DF55, 0x316E8EEF, 0x4669BE79,
  56         0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236, 0xCC0C7795, 0xBB0B4703, 0x220216B9, 0x5505262F,
  57         0xC5BA3BBE, 0xB2BD0B28, 0x2BB45A92, 0x5CB36A04, 0xC2D7FFA7, 0xB5D0CF31, 0x2CD99E8B, 0x5BDEAE1D,
  58         0x9B64C2B0, 0xEC63F226, 0x756AA39C, 0x026D930A, 0x9C0906A9, 0xEB0E363F, 0x72076785, 0x05005713,
  59         0x95BF4A82, 0xE2B87A14, 0x7BB12BAE, 0x0CB61B38, 0x92D28E9B, 0xE5D5BE0D, 0x7CDCEFB7, 0x0BDBDF21,
  60         0x86D3D2D4, 0xF1D4E242, 0x68DDB3F8, 0x1FDA836E, 0x81BE16CD, 0xF6B9265B, 0x6FB077E1, 0x18B74777,
  61         0x88085AE6, 0xFF0F6A70, 0x66063BCA, 0x11010B5C, 0x8F659EFF, 0xF862AE69, 0x616BFFD3, 0x166CCF45,
  62         0xA00AE278, 0xD70DD2EE, 0x4E048354, 0x3903B3C2, 0xA7672661, 0xD06016F7, 0x4969474D, 0x3E6E77DB,
  63         0xAED16A4A, 0xD9D65ADC, 0x40DF0B66, 0x37D83BF0, 0xA9BCAE53, 0xDEBB9EC5, 0x47B2CF7F, 0x30B5FFE9,
  64         0xBDBDF21C, 0xCABAC28A, 0x53B39330, 0x24B4A3A6, 0xBAD03605, 0xCDD70693, 0x54DE5729, 0x23D967BF,
  65         0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94, 0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, 0x2D02EF8D
  66 };
  67
  68 void int2tag(char *tag, uint32_t value) {
  69   uint32_t network = htonl(value);
  70   memcpy(tag, (char *)(&network), 4);
  71 }
  72
  73 uint32_t crc32(uint32_t crc, uint8_t *data, size_t len)
  74 {
  75         while (len--)
  76                 crc = (crc >> 8) ^ crc32tab[(crc ^ *data++) & 0xFF];
  77
  78         return crc;
  79 }
  80
  81 uint32_t compute_crc32(uint32_t crc, FILE *binfile, size_t compute_start, size_t compute_len)
  82 {
  83         uint8_t readbuf[1024];
  84         size_t read;
  85
  86         fseek(binfile, compute_start, SEEK_SET);
  87
  88         /* read block of 1024 bytes */
  89         while (binfile && !feof(binfile) && !ferror(binfile) && (compute_len >= sizeof(readbuf))) {
  90                 read = fread(readbuf, sizeof(uint8_t), sizeof(readbuf), binfile);
  91                 crc = crc32(crc, readbuf, read);
  92                 compute_len = compute_len - read;
  93         }
  94
  95         /* Less than 1024 bytes remains, read compute_len bytes */
  96         if (binfile && !feof(binfile) && !ferror(binfile) && (compute_len > 0)) {
  97                 read = fread(readbuf, sizeof(uint8_t), compute_len, binfile);
  98                 crc = crc32(crc, readbuf, read);
  99         }
 100
 101         return crc;
 102 }
 103
 104 size_t getlen(FILE *fp)
 105 {
 106         size_t retval, curpos;
 107
 108         if (!fp)
 109                 return 0;
 110
 111         curpos = ftell(fp);
 112         fseek(fp, 0, SEEK_END);
 113         retval = ftell(fp);
 114         fseek(fp, curpos, SEEK_SET);
 115
 116         return retval;
 117 }
 118
 119 int tagfile(const char *kernel, const char *rootfs, const char *bin, \
 120                         const struct gengetopt_args_info *args, \
 121                         uint32_t flash_start, uint32_t image_offset, \
 122                         uint32_t block_size, uint32_t load_address, uint32_t entry)
 123 {
 124         struct bcm_tag tag;
 125         struct kernelhdr khdr;
 126         FILE *kernelfile = NULL, *rootfsfile = NULL, *binfile = NULL, *cfefile = NULL;
 127         size_t cfeoff, cfelen, kerneloff, kernellen, rootfsoff, rootfslen, \
 128           read, imagelen, rootfsoffpadlen = 0, kernelfslen, kerneloffpadlen = 0, oldrootfslen;
 129         uint8_t readbuf[1024];
 130         uint32_t imagecrc = IMAGETAG_CRC_START;
 131         uint32_t kernelcrc = IMAGETAG_CRC_START;
 132         uint32_t rootfscrc = IMAGETAG_CRC_START;
 133         uint32_t kernelfscrc = IMAGETAG_CRC_START;
 134         uint32_t fwaddr = 0;
 135         uint8_t crc_val;
 136         const uint32_t deadcode = htonl(DEADCODE);
 137         int i;
 138         int is_pirelli = 0;
 139
 140
 141         memset(&tag, 0, sizeof(struct bcm_tag));
 142
 143         if (!kernel || !rootfs) {
 144                 fprintf(stderr, "imagetag can't create an image without both kernel and rootfs\n");
 145         }
 146
 147         if (kernel && !(kernelfile = fopen(kernel, "rb"))) {
 148                 fprintf(stderr, "Unable to open kernel \"%s\"\n", kernel);
 149                 return 1;
 150         }
 151
 152         if (rootfs && !(rootfsfile = fopen(rootfs, "rb"))) {
 153                 fprintf(stderr, "Unable to open rootfs \"%s\"\n", rootfs);
 154                 return 1;
 155         }
 156
 157         if (!bin || !(binfile = fopen(bin, "wb+"))) {
 158                 fprintf(stderr, "Unable to open output file \"%s\"\n", bin);
 159                 return 1;
 160         }
 161
 162         if ((args->cfe_given) && (args->cfe_arg)) {
 163           if (!(cfefile = fopen(args->cfe_arg, "rb"))) {
 164                 fprintf(stderr, "Unable to open CFE file \"%s\"\n", args->cfe_arg);
 165           }
 166         }
 167
 168         fwaddr = flash_start + image_offset;
 169         if (cfefile) {
 170           cfeoff = flash_start;
 171           cfelen = getlen(cfefile);
 172           /* Seek to the start of the file after tag */
 173           fseek(binfile, sizeof(tag), SEEK_SET);
 174
 175           /* Write the cfe */
 176           while (cfefile && !feof(cfefile) && !ferror(cfefile)) {
 177                 read = fread(readbuf, sizeof(uint8_t), sizeof(readbuf), cfefile);
 178                 fwrite(readbuf, sizeof(uint8_t), read, binfile);
 179           }
 180
 181         } else {
 182           cfeoff = 0;
 183           cfelen = 0;
 184         }
 185
 186         if (!args->root_first_flag) {
 187           /* Build the kernel address and length (doesn't need to be aligned, read only) */
 188           kerneloff = fwaddr + sizeof(tag);
 189
 190           kernellen = getlen(kernelfile);
 191
 192           if (!args->kernel_file_has_header_flag) {
 193                 /* Build the kernel header */
 194                 khdr.loadaddr   = htonl(load_address);
 195                 khdr.entry      = htonl(entry);
 196                 khdr.lzmalen    = htonl(kernellen);
 197
 198                 /* Increase the kernel size by the header size */
 199                 kernellen += sizeof(khdr);
 200           }
 201
 202           /* Build the rootfs address and length (start and end do need to be aligned on flash erase block boundaries */
 203           rootfsoff = kerneloff + kernellen;
 204           rootfsoff = (rootfsoff % block_size) > 0 ? (((rootfsoff / block_size) + 1) * block_size) : rootfsoff;
 205           rootfslen = getlen(rootfsfile);
 206           rootfslen = ( (rootfslen % block_size) > 0 ? (((rootfslen / block_size) + 1) * block_size) : rootfslen );
 207           imagelen = rootfsoff + rootfslen - kerneloff + sizeof(deadcode);
 208           rootfsoffpadlen = rootfsoff - (kerneloff + kernellen);
 209
 210           /* Seek to the start of the kernel */
 211           fseek(binfile, kerneloff - fwaddr + cfelen, SEEK_SET);
 212
 213           /* Write the kernel header */
 214           fwrite(&khdr, sizeof(khdr), 1, binfile);
 215
 216           /* Write the kernel */
 217           while (kernelfile && !feof(kernelfile) && !ferror(kernelfile)) {
 218                 read = fread(readbuf, sizeof(uint8_t), sizeof(readbuf), kernelfile);
 219                 fwrite(readbuf, sizeof(uint8_t), read, binfile);
 220           }
 221
 222           /* Write the RootFS */
 223           fseek(binfile, rootfsoff - fwaddr + cfelen, SEEK_SET);
 224           while (rootfsfile && !feof(rootfsfile) && !ferror(rootfsfile)) {
 225                 read = fread(readbuf, sizeof(uint8_t), sizeof(readbuf), rootfsfile);
 226                 fwrite(readbuf, sizeof(uint8_t), read, binfile);
 227           }
 228
 229           /* Align image to specified erase block size and append deadc0de */
 230           printf("Data alignment to %dk with 'deadc0de' appended\n", block_size/1024);
 231           fseek(binfile, rootfsoff + rootfslen - fwaddr + cfelen, SEEK_SET);
 232           fwrite(&deadcode, sizeof(uint32_t), 1, binfile);
 233
 234           /* Flush the binfile buffer so that when we read from file, it contains
 235            * everything in the buffer
 236            */
 237           fflush(binfile);
 238
 239           /* Compute the crc32 of the entire image (deadC0de included) */
 240           imagecrc = compute_crc32(imagecrc, binfile, kerneloff - fwaddr + cfelen, imagelen);
 241           /* Compute the crc32 of the kernel and padding between kernel and rootfs) */
 242           kernelcrc = compute_crc32(kernelcrc, binfile, kerneloff - fwaddr + cfelen, kernellen + rootfsoffpadlen);
 243           /* Compute the crc32 of the kernel and padding between kernel and rootfs) */
 244           kernelfscrc = compute_crc32(kernelfscrc, binfile, kerneloff - fwaddr + cfelen, kernellen + rootfsoffpadlen + rootfslen + sizeof(deadcode));
 245           /* Compute the crc32 of the flashImageStart to rootLength.
 246            * The broadcom firmware assumes the rootfs starts the image,
 247            * therefore uses the rootfs start to determine where to flash
 248            * the image.  Since we have the kernel first we have to give
 249            * it the kernel address, but the crc uses the length
 250            * associated with this address, which is added to the kernel
 251            * length to determine the length of image to flash and thus
 252            * needs to be rootfs + deadcode
 253            */
 254           rootfscrc = compute_crc32(rootfscrc, binfile, kerneloff - fwaddr + cfelen, rootfslen + sizeof(deadcode));
 255
 256         } else {
 257           /* Build the kernel address and length (doesn't need to be aligned, read only) */
 258           rootfsoff = fwaddr + sizeof(tag);
 259           oldrootfslen = getlen(rootfsfile);
 260           rootfslen = oldrootfslen;
 261           rootfslen = ( (rootfslen % block_size) > 0 ? (((rootfslen / block_size) + 1) * block_size) : rootfslen );
 262           kerneloffpadlen = rootfslen - oldrootfslen;
 263
 264           kerneloff = rootfsoff + rootfslen;
 265           kernellen = getlen(kernelfile);
 266
 267           imagelen = cfelen + rootfslen + kernellen;
 268
 269           /* Seek to the start of the kernel */
 270           fseek(binfile, kerneloff - fwaddr + cfelen, SEEK_SET);
 271
 272           if (!args->kernel_file_has_header_flag) {
 273                 /* Build the kernel header */
 274                 khdr.loadaddr   = htonl(load_address);
 275                 khdr.entry      = htonl(entry);
 276                 khdr.lzmalen    = htonl(kernellen);
 277
 278                 /* Write the kernel header */
 279                 fwrite(&khdr, sizeof(khdr), 1, binfile);
 280
 281                 /* Increase the kernel size by the header size */
 282                 kernellen += sizeof(khdr);
 283           }
 284
 285           /* Write the kernel */
 286           while (kernelfile && !feof(kernelfile) && !ferror(kernelfile)) {
 287                 read = fread(readbuf, sizeof(uint8_t), sizeof(readbuf), kernelfile);
 288                 fwrite(readbuf, sizeof(uint8_t), read, binfile);
 289           }
 290
 291           /* Write the RootFS */
 292           fseek(binfile, rootfsoff - fwaddr + cfelen, SEEK_SET);
 293           while (rootfsfile && !feof(rootfsfile) && !ferror(rootfsfile)) {
 294                 read = fread(readbuf, sizeof(uint8_t), sizeof(readbuf), rootfsfile);
 295                 fwrite(readbuf, sizeof(uint8_t), read, binfile);
 296           }
 297
 298           /* Flush the binfile buffer so that when we read from file, it contains
 299            * everything in the buffer
 300            */
 301           fflush(binfile);
 302
 303           /* Compute the crc32 of the entire image (deadC0de included) */
 304           imagecrc = compute_crc32(imagecrc, binfile, sizeof(tag), imagelen);
 305           /* Compute the crc32 of the kernel and padding between kernel and rootfs) */
 306           kernelcrc = compute_crc32(kernelcrc, binfile, kerneloff - fwaddr + cfelen, kernellen + rootfsoffpadlen);
 307           kernelfscrc = compute_crc32(kernelfscrc, binfile, rootfsoff - fwaddr + cfelen, kernellen + rootfslen);
 308           rootfscrc = compute_crc32(rootfscrc, binfile, rootfsoff - fwaddr + cfelen, rootfslen);
 309         }
 310
 311         /* Close the files */
 312         if (cfefile) {
 313           fclose(cfefile);
 314         }
 315         fclose(kernelfile);
 316         fclose(rootfsfile);
 317
 318         /* Build the tag */
 319         strncpy(tag.tagVersion, args->tag_version_arg, sizeof(tag.tagVersion) - 1);
 320         strncpy(tag.sig_1, args->signature_arg, sizeof(tag.sig_1) - 1);
 321         strncpy(tag.sig_2, args->signature2_arg, sizeof(tag.sig_2) - 1);
 322         strncpy(tag.chipid, args->chipid_arg, sizeof(tag.chipid) - 1);
 323         strncpy(tag.boardid, args->boardid_arg, sizeof(tag.boardid) - 1);
 324         strcpy(tag.big_endian, "1");
 325         sprintf(tag.totalLength, "%lu", imagelen);
 326
 327         if (args->cfe_given) {
 328           sprintf(tag.cfeAddress, "%lu", flash_start);
 329           sprintf(tag.cfeLength, "%lu", cfelen);
 330         } else {
 331           /* We don't include CFE */
 332           strcpy(tag.cfeAddress, "0");
 333           strcpy(tag.cfeLength, "0");
 334         }
 335
 336         sprintf(tag.kernelAddress, "%lu", kerneloff);
 337         sprintf(tag.kernelLength, "%lu", kernellen + rootfsoffpadlen);
 338
 339         if (args->root_first_flag) {
 340           sprintf(tag.flashImageStart, "%lu", rootfsoff);
 341           sprintf(tag.rootLength, "%lu", rootfslen);
 342         } else {
 343           sprintf(tag.flashImageStart, "%lu", kerneloff);
 344           sprintf(tag.rootLength, "%lu", rootfslen + sizeof(deadcode));
 345         }
 346
 347         if (args->rsa_signature_given) {
 348             strncpy(tag.rsa_signature, args->rsa_signature_arg, RSASIG_LEN);
 349         }
 350
 351         if (args->layoutver_given) {
 352             strncpy(tag.flashLayoutVer, args->layoutver_arg, TAGLAYOUT_LEN);
 353         }
 354
 355         if (args->info1_given) {
 356           strncpy(tag.information1, args->info1_arg, TAGINFO1_LEN);
 357         }
 358
 359         if (args->info2_given) {
 360           strncpy(tag.information2, args->info2_arg, TAGINFO2_LEN);
 361         }
 362
 363         if (args->reserved1_given) {
 364           strncpy(tag.reserved1, args->reserved1_arg, 8);
 365         }
 366
 367         if (args->reserved2_given) {
 368           strncpy(tag.reserved2, args->reserved2_arg, 16);
 369         }
 370
 371         if (args->altinfo_given) {
 372           strncpy(&tag.information1[0], args->altinfo_arg, ALTTAGINFO_LEN);
 373         }
 374
 375         if (args->second_image_flag_given) {
 376           if (strncmp(args->second_image_flag_arg, "2", DUALFLAG_LEN) != 0) {
 377                 strncpy(tag.dualImage, args->second_image_flag_arg, DUALFLAG_LEN);
 378           }
 379         }
 380
 381         if (args->inactive_given) {
 382           if (strncmp(args->inactive_arg, "2", INACTIVEFLAG_LEN) != 0) {
 383                 strncpy(tag.inactiveFlag, args->second_image_flag_arg, INACTIVEFLAG_LEN);
 384           }
 385         }
 386
 387         for (i = 0; i < NUM_PIRELLI; i++) {
 388                 if (strncmp(args->boardid_arg, pirellitab[i], BOARDID_LEN) == 0) {
 389                         is_pirelli = 1;
 390                         break;
 391                 }
 392         }
 393
 394         if ( !is_pirelli ) {
 395           int2tag(tag.imageCRC, kernelfscrc);
 396         } else {
 397           int2tag(tag.imageCRC, kernelcrc);
 398         }
 399
 400         int2tag(&(tag.rootfsCRC[0]), rootfscrc);
 401         int2tag(tag.kernelCRC, kernelcrc);
 402         int2tag(tag.fskernelCRC, kernelfscrc);
 403         int2tag(tag.headerCRC, crc32(IMAGETAG_CRC_START, (uint8_t*)&tag, sizeof(tag) - 20));
 404
 405         fseek(binfile, 0L, SEEK_SET);
 406         fwrite(&tag, sizeof(uint8_t), sizeof(tag), binfile);
 407
 408     fflush(binfile);
 409         fclose(binfile);
 410
 411         return 0;
 412 }
 413
 414 int main(int argc, char **argv)
 415 {
 416     int c, i;
 417         char *kernel, *rootfs, *bin;
 418         uint32_t flash_start, image_offset, block_size, load_address, entry;
 419         flash_start = image_offset = block_size = load_address = entry = 0;
 420         struct gengetopt_args_info parsed_args;
 421
 422         kernel = rootfs = bin = NULL;
 423
 424         if (cmdline_parser(argc, argv, &parsed_args)) {
 425           exit(1);
 426         }
 427
 428         printf("Broadcom 63xx image tagger - v2.0.0\n");
 429         printf("Copyright (C) 2008 Axel Gembe\n");
 430         printf("Copyright (C) 2009-2010 Daniel Dickinson\n");
 431         printf("Licensed under the terms of the Gnu General Public License\n");
 432
 433         kernel = parsed_args.kernel_arg;
 434         rootfs = parsed_args.rootfs_arg;
 435         bin = parsed_args.output_arg;
 436         if (strlen(parsed_args.tag_version_arg) >= TAGVER_LEN) {
 437           fprintf(stderr, "Error: Tag Version (tag_version,v) too long.\n");
 438           exit(1);
 439         }
 440         if (strlen(parsed_args.boardid_arg) >= BOARDID_LEN) {
 441           fprintf(stderr, "Error: Board ID (boardid,b) too long.\n");
 442           exit(1);
 443         }
 444         if (strlen(parsed_args.chipid_arg) >= CHIPID_LEN) {
 445           fprintf(stderr, "Error: Chip ID (chipid,c) too long.\n");
 446           exit(1);
 447         }
 448         if (strlen(parsed_args.signature_arg) >= SIG1_LEN) {
 449           fprintf(stderr, "Error: Magic string (signature,a) too long.\n");
 450           exit(1);
 451         }
 452         if (strlen(parsed_args.signature2_arg) >= SIG2_LEN) {
 453           fprintf(stderr, "Error: Second magic string (signature2,m) too long.\n");
 454           exit(1);
 455         }
 456         if (parsed_args.layoutver_given) {
 457           if (strlen(parsed_args.layoutver_arg) > FLASHLAYOUTVER_LEN) {
 458                 fprintf(stderr, "Error: Flash layout version (layoutver,y) too long.\n");
 459                 exit(1);
 460           }
 461         }
 462         if (parsed_args.rsa_signature_given) {
 463           if (strlen(parsed_args.rsa_signature_arg) > RSASIG_LEN) {
 464                 fprintf(stderr, "Error: RSA Signature (rsa_signature,r) too long.\n");
 465                 exit(1);
 466           }
 467         }
 468
 469         if (parsed_args.info1_given) {
 470           if (strlen(parsed_args.info1_arg) >= TAGINFO1_LEN) {
 471                 fprintf(stderr, "Error: Vendor Information 1 (info1) too long.\n");
 472                 exit(1);
 473           }
 474         }
 475
 476         if (parsed_args.info2_given) {
 477           if (strlen(parsed_args.info2_arg) >= TAGINFO2_LEN) {
 478                 fprintf(stderr, "Error: Vendor Information 2 (info2) too long.\n");
 479                 exit(1);
 480           }
 481         }
 482
 483         if (parsed_args.altinfo_given) {
 484           if (strlen(parsed_args.altinfo_arg) >= ALTTAGINFO_LEN) {
 485                 fprintf(stderr, "Error: Vendor Information 1 (info1) too long.\n");
 486                 exit(1);
 487           }
 488         }
 489         flash_start = strtoul(parsed_args.flash_start_arg, NULL, 16);
 490         image_offset = strtoul(parsed_args.image_offset_arg, NULL, 16);
 491         block_size = strtoul(parsed_args.block_size_arg, NULL, 16);
 492
 493         if (!parsed_args.kernel_file_has_header_flag) {
 494           load_address = strtoul(parsed_args.load_addr_arg, NULL, 16);
 495           entry = strtoul(parsed_args.entry_arg, NULL, 16);
 496           if (load_address == 0) {
 497                 fprintf(stderr, "Error: Invalid value for load address\n");
 498           }
 499           if (entry == 0) {
 500                 fprintf(stderr, "Error: Invalid value for entry\n");
 501           }
 502         }
 503
 504         return tagfile(kernel, rootfs, bin, &parsed_args, flash_start, image_offset, block_size, load_address, entry);
 505 }