tools/mkimage.c

   1 /*
   2  * (C) Copyright 2008 Semihalf
   3  *
   4  * (C) Copyright 2000-2004
   5  * DENX Software Engineering
   6  * Wolfgang Denk, wd@denx.de
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23
  24 #include "mkimage.h"
  25 #include <image.h>
  26
  27 extern  unsigned long   crc32 (unsigned long crc, const char *buf, unsigned int len);
  28 static  void            copy_file (int, const char *, int);
  29 static  void            usage (void);
  30 static  void            image_verify_header (char *, int);
  31 static  void            fit_handle_file (void);
  32
  33 char    *datafile;
  34 char    *imagefile;
  35 char    *cmdname;
  36
  37 int dflag    = 0;
  38 int eflag    = 0;
  39 int fflag    = 0;
  40 int lflag    = 0;
  41 int vflag    = 0;
  42 int xflag    = 0;
  43 int opt_os   = IH_OS_LINUX;
  44 int opt_arch = IH_ARCH_PPC;
  45 int opt_type = IH_TYPE_KERNEL;
  46 int opt_comp = IH_COMP_GZIP;
  47 char *opt_dtc = MKIMAGE_DEFAULT_DTC_OPTIONS;
  48
  49 image_header_t header;
  50 image_header_t *hdr = &header;
  51
  52 int
  53 main (int argc, char **argv)
  54 {
  55         int ifd = -1;
  56         uint32_t checksum;
  57         uint32_t addr;
  58         uint32_t ep;
  59         struct stat sbuf;
  60         unsigned char *ptr;
  61         char *name = "";
  62
  63         cmdname = *argv;
  64
  65         addr = ep = 0;
  66
  67         while (--argc > 0 && **++argv == '-') {
  68                 while (*++*argv) {
  69                         switch (**argv) {
  70                         case 'l':
  71                                 lflag = 1;
  72                                 break;
  73                         case 'A':
  74                                 if ((--argc <= 0) ||
  75                                     (opt_arch = genimg_get_arch_id (*++argv)) < 0)
  76                                         usage ();
  77                                 goto NXTARG;
  78                         case 'C':
  79                                 if ((--argc <= 0) ||
  80                                     (opt_comp = genimg_get_comp_id (*++argv)) < 0)
  81                                         usage ();
  82                                 goto NXTARG;
  83                         case 'D':
  84                                 if (--argc <= 0)
  85                                         usage ();
  86                                 opt_dtc = *++argv;
  87                                 goto NXTARG;
  88
  89                         case 'O':
  90                                 if ((--argc <= 0) ||
  91                                     (opt_os = genimg_get_os_id (*++argv)) < 0)
  92                                         usage ();
  93                                 goto NXTARG;
  94                         case 'T':
  95                                 if ((--argc <= 0) ||
  96                                     (opt_type = genimg_get_type_id (*++argv)) < 0)
  97                                         usage ();
  98                                 goto NXTARG;
  99
 100                         case 'a':
 101                                 if (--argc <= 0)
 102                                         usage ();
 103                                 addr = strtoul (*++argv, (char **)&ptr, 16);
 104                                 if (*ptr) {
 105                                         fprintf (stderr,
 106                                                 "%s: invalid load address %s\n",
 107                                                 cmdname, *argv);
 108                                         exit (EXIT_FAILURE);
 109                                 }
 110                                 goto NXTARG;
 111                         case 'd':
 112                                 if (--argc <= 0)
 113                                         usage ();
 114                                 datafile = *++argv;
 115                                 dflag = 1;
 116                                 goto NXTARG;
 117                         case 'e':
 118                                 if (--argc <= 0)
 119                                         usage ();
 120                                 ep = strtoul (*++argv, (char **)&ptr, 16);
 121                                 if (*ptr) {
 122                                         fprintf (stderr,
 123                                                 "%s: invalid entry point %s\n",
 124                                                 cmdname, *argv);
 125                                         exit (EXIT_FAILURE);
 126                                 }
 127                                 eflag = 1;
 128                                 goto NXTARG;
 129                         case 'f':
 130                                 if (--argc <= 0)
 131                                         usage ();
 132                                 datafile = *++argv;
 133                                 fflag = 1;
 134                                 goto NXTARG;
 135                         case 'n':
 136                                 if (--argc <= 0)
 137                                         usage ();
 138                                 name = *++argv;
 139                                 goto NXTARG;
 140                         case 'v':
 141                                 vflag++;
 142                                 break;
 143                         case 'x':
 144                                 xflag++;
 145                                 break;
 146                         default:
 147                                 usage ();
 148                         }
 149                 }
 150 NXTARG:         ;
 151         }
 152
 153         if ((argc != 1) ||
 154                 (dflag && (fflag || lflag)) ||
 155                 (fflag && (dflag || lflag)) ||
 156                 (lflag && (dflag || fflag)))
 157                 usage();
 158
 159         if (!eflag) {
 160                 ep = addr;
 161                 /* If XIP, entry point must be after the U-Boot header */
 162                 if (xflag)
 163                         ep += image_get_header_size ();
 164         }
 165
 166         /*
 167          * If XIP, ensure the entry point is equal to the load address plus
 168          * the size of the U-Boot header.
 169          */
 170         if (xflag) {
 171                 if (ep != addr + image_get_header_size ()) {
 172                         fprintf (stderr,
 173                                 "%s: For XIP, the entry point must be the load addr + %lu\n",
 174                                 cmdname,
 175                                 (unsigned long)image_get_header_size ());
 176                         exit (EXIT_FAILURE);
 177                 }
 178         }
 179
 180         imagefile = *argv;
 181
 182         if (!fflag){
 183                 if (lflag) {
 184                         ifd = open (imagefile, O_RDONLY|O_BINARY);
 185                 } else {
 186                         ifd = open (imagefile,
 187                                 O_RDWR|O_CREAT|O_TRUNC|O_BINARY, 0666);
 188                 }
 189
 190                 if (ifd < 0) {
 191                         fprintf (stderr, "%s: Can't open %s: %s\n",
 192                                 cmdname, imagefile, strerror(errno));
 193                         exit (EXIT_FAILURE);
 194                 }
 195         }
 196
 197         if (lflag) {
 198                 /*
 199                  * list header information of existing image
 200                  */
 201                 if (fstat(ifd, &sbuf) < 0) {
 202                         fprintf (stderr, "%s: Can't stat %s: %s\n",
 203                                 cmdname, imagefile, strerror(errno));
 204                         exit (EXIT_FAILURE);
 205                 }
 206
 207                 if ((unsigned)sbuf.st_size < image_get_header_size ()) {
 208                         fprintf (stderr,
 209                                 "%s: Bad size: \"%s\" is no valid image\n",
 210                                 cmdname, imagefile);
 211                         exit (EXIT_FAILURE);
 212                 }
 213
 214                 ptr = mmap(0, sbuf.st_size, PROT_READ, MAP_SHARED, ifd, 0);
 215                 if (ptr == MAP_FAILED) {
 216                         fprintf (stderr, "%s: Can't read %s: %s\n",
 217                                 cmdname, imagefile, strerror(errno));
 218                         exit (EXIT_FAILURE);
 219                 }
 220
 221                 if (fdt_check_header (ptr)) {
 222                         /* old-style image */
 223                         image_verify_header ((char *)ptr, sbuf.st_size);
 224                         image_print_contents ((image_header_t *)ptr);
 225                 } else {
 226                         /* FIT image */
 227                         fit_print_contents (ptr);
 228                 }
 229
 230                 (void) munmap((void *)ptr, sbuf.st_size);
 231                 (void) close (ifd);
 232
 233                 exit (EXIT_SUCCESS);
 234         } else if (fflag) {
 235                 /* Flattened Image Tree (FIT) format  handling */
 236                 debug ("FIT format handling\n");
 237                 fit_handle_file ();
 238                 exit (EXIT_SUCCESS);
 239         }
 240
 241         /*
 242          * Must be -w then:
 243          *
 244          * write dummy header, to be fixed later
 245          */
 246         memset (hdr, 0, image_get_header_size ());
 247
 248         if (write(ifd, hdr, image_get_header_size ()) != image_get_header_size ()) {
 249                 fprintf (stderr, "%s: Write error on %s: %s\n",
 250                         cmdname, imagefile, strerror(errno));
 251                 exit (EXIT_FAILURE);
 252         }
 253
 254         if (opt_type == IH_TYPE_MULTI || opt_type == IH_TYPE_SCRIPT) {
 255                 char *file = datafile;
 256                 uint32_t size;
 257
 258                 for (;;) {
 259                         char *sep = NULL;
 260
 261                         if (file) {
 262                                 if ((sep = strchr(file, ':')) != NULL) {
 263                                         *sep = '\0';
 264                                 }
 265
 266                                 if (stat (file, &sbuf) < 0) {
 267                                         fprintf (stderr, "%s: Can't stat %s: %s\n",
 268                                                 cmdname, file, strerror(errno));
 269                                         exit (EXIT_FAILURE);
 270                                 }
 271                                 size = cpu_to_uimage (sbuf.st_size);
 272                         } else {
 273                                 size = 0;
 274                         }
 275
 276                         if (write(ifd, (char *)&size, sizeof(size)) != sizeof(size)) {
 277                                 fprintf (stderr, "%s: Write error on %s: %s\n",
 278                                         cmdname, imagefile, strerror(errno));
 279                                 exit (EXIT_FAILURE);
 280                         }
 281
 282                         if (!file) {
 283                                 break;
 284                         }
 285
 286                         if (sep) {
 287                                 *sep = ':';
 288                                 file = sep + 1;
 289                         } else {
 290                                 file = NULL;
 291                         }
 292                 }
 293
 294                 file = datafile;
 295
 296                 for (;;) {
 297                         char *sep = strchr(file, ':');
 298                         if (sep) {
 299                                 *sep = '\0';
 300                                 copy_file (ifd, file, 1);
 301                                 *sep++ = ':';
 302                                 file = sep;
 303                         } else {
 304                                 copy_file (ifd, file, 0);
 305                                 break;
 306                         }
 307                 }
 308         } else {
 309                 copy_file (ifd, datafile, 0);
 310         }
 311
 312         /* We're a bit of paranoid */
 313 #if defined(_POSIX_SYNCHRONIZED_IO) && !defined(__sun__) && !defined(__FreeBSD__) && !defined(__APPLE__)
 314         (void) fdatasync (ifd);
 315 #else
 316         (void) fsync (ifd);
 317 #endif
 318
 319         if (fstat(ifd, &sbuf) < 0) {
 320                 fprintf (stderr, "%s: Can't stat %s: %s\n",
 321                         cmdname, imagefile, strerror(errno));
 322                 exit (EXIT_FAILURE);
 323         }
 324
 325         ptr = mmap(0, sbuf.st_size, PROT_READ|PROT_WRITE, MAP_SHARED, ifd, 0);
 326         if (ptr == MAP_FAILED) {
 327                 fprintf (stderr, "%s: Can't map %s: %s\n",
 328                         cmdname, imagefile, strerror(errno));
 329                 exit (EXIT_FAILURE);
 330         }
 331
 332         hdr = (image_header_t *)ptr;
 333
 334         checksum = crc32 (0,
 335                           (const char *)(ptr + image_get_header_size ()),
 336                           sbuf.st_size - image_get_header_size ()
 337                          );
 338
 339         /* Build new header */
 340         image_set_magic (hdr, IH_MAGIC);
 341         image_set_time (hdr, sbuf.st_mtime);
 342         image_set_size (hdr, sbuf.st_size - image_get_header_size ());
 343         image_set_load (hdr, addr);
 344         image_set_ep (hdr, ep);
 345         image_set_dcrc (hdr, checksum);
 346         image_set_os (hdr, opt_os);
 347         image_set_arch (hdr, opt_arch);
 348         image_set_type (hdr, opt_type);
 349         image_set_comp (hdr, opt_comp);
 350
 351         image_set_name (hdr, name);
 352
 353         checksum = crc32 (0, (const char *)hdr, image_get_header_size ());
 354
 355         image_set_hcrc (hdr, checksum);
 356
 357         image_print_contents (hdr);
 358
 359         (void) munmap((void *)ptr, sbuf.st_size);
 360
 361         /* We're a bit of paranoid */
 362 #if defined(_POSIX_SYNCHRONIZED_IO) && !defined(__sun__) && !defined(__FreeBSD__) && !defined(__APPLE__)
 363         (void) fdatasync (ifd);
 364 #else
 365         (void) fsync (ifd);
 366 #endif
 367
 368         if (close(ifd)) {
 369                 fprintf (stderr, "%s: Write error on %s: %s\n",
 370                         cmdname, imagefile, strerror(errno));
 371                 exit (EXIT_FAILURE);
 372         }
 373
 374         exit (EXIT_SUCCESS);
 375 }
 376
 377 static void
 378 copy_file (int ifd, const char *datafile, int pad)
 379 {
 380         int dfd;
 381         struct stat sbuf;
 382         unsigned char *ptr;
 383         int tail;
 384         int zero = 0;
 385         int offset = 0;
 386         int size;
 387
 388         if (vflag) {
 389                 fprintf (stderr, "Adding Image %s\n", datafile);
 390         }
 391
 392         if ((dfd = open(datafile, O_RDONLY|O_BINARY)) < 0) {
 393                 fprintf (stderr, "%s: Can't open %s: %s\n",
 394                         cmdname, datafile, strerror(errno));
 395                 exit (EXIT_FAILURE);
 396         }
 397
 398         if (fstat(dfd, &sbuf) < 0) {
 399                 fprintf (stderr, "%s: Can't stat %s: %s\n",
 400                         cmdname, datafile, strerror(errno));
 401                 exit (EXIT_FAILURE);
 402         }
 403
 404         ptr = mmap(0, sbuf.st_size, PROT_READ, MAP_SHARED, dfd, 0);
 405         if (ptr == MAP_FAILED) {
 406                 fprintf (stderr, "%s: Can't read %s: %s\n",
 407                         cmdname, datafile, strerror(errno));
 408                 exit (EXIT_FAILURE);
 409         }
 410
 411         if (xflag) {
 412                 unsigned char *p = NULL;
 413                 /*
 414                  * XIP: do not append the image_header_t at the
 415                  * beginning of the file, but consume the space
 416                  * reserved for it.
 417                  */
 418
 419                 if ((unsigned)sbuf.st_size < image_get_header_size ()) {
 420                         fprintf (stderr,
 421                                 "%s: Bad size: \"%s\" is too small for XIP\n",
 422                                 cmdname, datafile);
 423                         exit (EXIT_FAILURE);
 424                 }
 425
 426                 for (p = ptr; p < ptr + image_get_header_size (); p++) {
 427                         if ( *p != 0xff ) {
 428                                 fprintf (stderr,
 429                                         "%s: Bad file: \"%s\" has invalid buffer for XIP\n",
 430                                         cmdname, datafile);
 431                                 exit (EXIT_FAILURE);
 432                         }
 433                 }
 434
 435                 offset = image_get_header_size ();
 436         }
 437
 438         size = sbuf.st_size - offset;
 439         if (write(ifd, ptr + offset, size) != size) {
 440                 fprintf (stderr, "%s: Write error on %s: %s\n",
 441                         cmdname, imagefile, strerror(errno));
 442                 exit (EXIT_FAILURE);
 443         }
 444
 445         if (pad && ((tail = size % 4) != 0)) {
 446
 447                 if (write(ifd, (char *)&zero, 4-tail) != 4-tail) {
 448                         fprintf (stderr, "%s: Write error on %s: %s\n",
 449                                 cmdname, imagefile, strerror(errno));
 450                         exit (EXIT_FAILURE);
 451                 }
 452         }
 453
 454         (void) munmap((void *)ptr, sbuf.st_size);
 455         (void) close (dfd);
 456 }
 457
 458 void
 459 usage ()
 460 {
 461         fprintf (stderr, "Usage: %s -l image\n"
 462                          "          -l ==> list image header information\n",
 463                 cmdname);
 464         fprintf (stderr, "       %s [-x] -A arch -O os -T type -C comp "
 465                          "-a addr -e ep -n name -d data_file[:data_file...] image\n"
 466                          "          -A ==> set architecture to 'arch'\n"
 467                          "          -O ==> set operating system to 'os'\n"
 468                          "          -T ==> set image type to 'type'\n"
 469                          "          -C ==> set compression type 'comp'\n"
 470                          "          -a ==> set load address to 'addr' (hex)\n"
 471                          "          -e ==> set entry point to 'ep' (hex)\n"
 472                          "          -n ==> set image name to 'name'\n"
 473                          "          -d ==> use image data from 'datafile'\n"
 474                          "          -x ==> set XIP (execute in place)\n",
 475                 cmdname);
 476         fprintf (stderr, "       %s [-D dtc_options] -f fit-image.its fit-image\n",
 477                 cmdname);
 478
 479         exit (EXIT_FAILURE);
 480 }
 481
 482 static void
 483 image_verify_header (char *ptr, int image_size)
 484 {
 485         int len;
 486         char *data;
 487         uint32_t checksum;
 488         image_header_t header;
 489         image_header_t *hdr = &header;
 490
 491         /*
 492          * create copy of header so that we can blank out the
 493          * checksum field for checking - this can't be done
 494          * on the PROT_READ mapped data.
 495          */
 496         memcpy (hdr, ptr, sizeof(image_header_t));
 497
 498         if (be32_to_cpu(hdr->ih_magic) != IH_MAGIC) {
 499                 fprintf (stderr,
 500                         "%s: Bad Magic Number: \"%s\" is no valid image\n",
 501                         cmdname, imagefile);
 502                 exit (EXIT_FAILURE);
 503         }
 504
 505         data = (char *)hdr;
 506         len  = sizeof(image_header_t);
 507
 508         checksum = be32_to_cpu(hdr->ih_hcrc);
 509         hdr->ih_hcrc = cpu_to_be32(0);  /* clear for re-calculation */
 510
 511         if (crc32 (0, data, len) != checksum) {
 512                 fprintf (stderr,
 513                         "%s: ERROR: \"%s\" has bad header checksum!\n",
 514                         cmdname, imagefile);
 515                 exit (EXIT_FAILURE);
 516         }
 517
 518         data = ptr + sizeof(image_header_t);
 519         len  = image_size - sizeof(image_header_t) ;
 520
 521         if (crc32 (0, data, len) != be32_to_cpu(hdr->ih_dcrc)) {
 522                 fprintf (stderr,
 523                         "%s: ERROR: \"%s\" has corrupted data!\n",
 524                         cmdname, imagefile);
 525                 exit (EXIT_FAILURE);
 526         }
 527 }
 528
 529 /**
 530  * fit_handle_file - main FIT file processing function
 531  *
 532  * fit_handle_file() runs dtc to convert .its to .itb, includes
 533  * binary data, updates timestamp property and calculates hashes.
 534  *
 535  * datafile  - .its file
 536  * imagefile - .itb file
 537  *
 538  * returns:
 539  *     only on success, otherwise calls exit (EXIT_FAILURE);
 540  */
 541 static void fit_handle_file (void)
 542 {
 543         char tmpfile[MKIMAGE_MAX_TMPFILE_LEN];
 544         char cmd[MKIMAGE_MAX_DTC_CMDLINE_LEN];
 545         int tfd;
 546         struct stat sbuf;
 547         unsigned char *ptr;
 548
 549         /* call dtc to include binary properties into the tmp file */
 550         if (strlen (imagefile) + strlen (MKIMAGE_TMPFILE_SUFFIX) + 1 >
 551                 sizeof (tmpfile)) {
 552                 fprintf (stderr, "%s: Image file name (%s) too long, "
 553                                 "can't create tmpfile",
 554                                 imagefile, cmdname);
 555                 exit (EXIT_FAILURE);
 556         }
 557         sprintf (tmpfile, "%s%s", imagefile, MKIMAGE_TMPFILE_SUFFIX);
 558
 559         /* dtc -I dts -O -p 200 datafile > tmpfile */
 560         sprintf (cmd, "%s %s %s > %s",
 561                         MKIMAGE_DTC, opt_dtc, datafile, tmpfile);
 562         debug ("Trying to execute \"%s\"\n", cmd);
 563         if (system (cmd) == -1) {
 564                 fprintf (stderr, "%s: system(%s) failed: %s\n",
 565                                 cmdname, cmd, strerror(errno));
 566                 unlink (tmpfile);
 567                 exit (EXIT_FAILURE);
 568         }
 569
 570         /* load FIT blob into memory */
 571         tfd = open (tmpfile, O_RDWR|O_BINARY);
 572
 573         if (tfd < 0) {
 574                 fprintf (stderr, "%s: Can't open %s: %s\n",
 575                                 cmdname, tmpfile, strerror(errno));
 576                 unlink (tmpfile);
 577                 exit (EXIT_FAILURE);
 578         }
 579
 580         if (fstat (tfd, &sbuf) < 0) {
 581                 fprintf (stderr, "%s: Can't stat %s: %s\n",
 582                                 cmdname, tmpfile, strerror(errno));
 583                 unlink (tmpfile);
 584                 exit (EXIT_FAILURE);
 585         }
 586
 587         ptr = mmap (0, sbuf.st_size, PROT_READ|PROT_WRITE, MAP_SHARED, tfd, 0);
 588         if (ptr == MAP_FAILED) {
 589                 fprintf (stderr, "%s: Can't read %s: %s\n",
 590                                 cmdname, tmpfile, strerror(errno));
 591                 unlink (tmpfile);
 592                 exit (EXIT_FAILURE);
 593         }
 594
 595         /* check if ptr has a valid blob */
 596         if (fdt_check_header (ptr)) {
 597                 fprintf (stderr, "%s: Invalid FIT blob\n", cmdname);
 598                 unlink (tmpfile);
 599                 exit (EXIT_FAILURE);
 600         }
 601
 602         /* set hashes for images in the blob */
 603         if (fit_set_hashes (ptr)) {
 604                 fprintf (stderr, "%s Can't add hashes to FIT blob", cmdname);
 605                 unlink (tmpfile);
 606                 exit (EXIT_FAILURE);
 607         }
 608
 609         /* add a timestamp at offset 0 i.e., root  */
 610         if (fit_set_timestamp (ptr, 0, sbuf.st_mtime)) {
 611                 fprintf (stderr, "%s: Can't add image timestamp\n", cmdname);
 612                 unlink (tmpfile);
 613                 exit (EXIT_FAILURE);
 614         }
 615         debug ("Added timestamp successfully\n");
 616
 617         munmap ((void *)ptr, sbuf.st_size);
 618         close (tfd);
 619
 620         if (rename (tmpfile, imagefile) == -1) {
 621                 fprintf (stderr, "%s: Can't rename %s to %s: %s\n",
 622                                 cmdname, tmpfile, imagefile, strerror (errno));
 623                 unlink (tmpfile);
 624                 unlink (imagefile);
 625                 exit (EXIT_FAILURE);
 626         }
 627 }