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  * All rights reserved.
   8  *
   9  * This program is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU General Public License as
  11  * published by the Free Software Foundation; either version 2 of
  12  * the License, or (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  22  * MA 02111-1307 USA
  23  */
  24
  25 #include "mkimage.h"
  26 #include <image.h>
  27
  28 extern int errno;
  29
  30 #ifndef MAP_FAILED
  31 #define MAP_FAILED (-1)
  32 #endif
  33
  34 extern  unsigned long   crc32 (unsigned long crc, const char *buf, unsigned int len);
  35 static  void            copy_file (int, const char *, int);
  36 static  void            usage (void);
  37 static  void            image_verify_header (char *, int);
  38 static  void            fit_handle_file (void);
  39
  40 char    *datafile;
  41 char    *imagefile;
  42 char    *cmdname;
  43
  44 int dflag    = 0;
  45 int eflag    = 0;
  46 int fflag    = 0;
  47 int lflag    = 0;
  48 int vflag    = 0;
  49 int xflag    = 0;
  50 int opt_os   = IH_OS_LINUX;
  51 int opt_arch = IH_ARCH_PPC;
  52 int opt_type = IH_TYPE_KERNEL;
  53 int opt_comp = IH_COMP_GZIP;
  54 char *opt_dtc = MKIMAGE_DEFAULT_DTC_OPTIONS;
  55
  56 image_header_t header;
  57 image_header_t *hdr = &header;
  58
  59 int
  60 main (int argc, char **argv)
  61 {
  62         int ifd = -1;
  63         uint32_t checksum;
  64         uint32_t addr;
  65         uint32_t ep;
  66         struct stat sbuf;
  67         unsigned char *ptr;
  68         char *name = "";
  69
  70         cmdname = *argv;
  71
  72         addr = ep = 0;
  73
  74         while (--argc > 0 && **++argv == '-') {
  75                 while (*++*argv) {
  76                         switch (**argv) {
  77                         case 'l':
  78                                 lflag = 1;
  79                                 break;
  80                         case 'A':
  81                                 if ((--argc <= 0) ||
  82                                     (opt_arch = genimg_get_arch_id (*++argv)) < 0)
  83                                         usage ();
  84                                 goto NXTARG;
  85                         case 'C':
  86                                 if ((--argc <= 0) ||
  87                                     (opt_comp = genimg_get_comp_id (*++argv)) < 0)
  88                                         usage ();
  89                                 goto NXTARG;
  90                         case 'D':
  91                                 if (--argc <= 0)
  92                                         usage ();
  93                                 opt_dtc = *++argv;
  94                                 goto NXTARG;
  95
  96                         case 'O':
  97                                 if ((--argc <= 0) ||
  98                                     (opt_os = genimg_get_os_id (*++argv)) < 0)
  99                                         usage ();
 100                                 goto NXTARG;
 101                         case 'T':
 102                                 if ((--argc <= 0) ||
 103                                     (opt_type = genimg_get_type_id (*++argv)) < 0)
 104                                         usage ();
 105                                 goto NXTARG;
 106
 107                         case 'a':
 108                                 if (--argc <= 0)
 109                                         usage ();
 110                                 addr = strtoul (*++argv, (char **)&ptr, 16);
 111                                 if (*ptr) {
 112                                         fprintf (stderr,
 113                                                 "%s: invalid load address %s\n",
 114                                                 cmdname, *argv);
 115                                         exit (EXIT_FAILURE);
 116                                 }
 117                                 goto NXTARG;
 118                         case 'd':
 119                                 if (--argc <= 0)
 120                                         usage ();
 121                                 datafile = *++argv;
 122                                 dflag = 1;
 123                                 goto NXTARG;
 124                         case 'e':
 125                                 if (--argc <= 0)
 126                                         usage ();
 127                                 ep = strtoul (*++argv, (char **)&ptr, 16);
 128                                 if (*ptr) {
 129                                         fprintf (stderr,
 130                                                 "%s: invalid entry point %s\n",
 131                                                 cmdname, *argv);
 132                                         exit (EXIT_FAILURE);
 133                                 }
 134                                 eflag = 1;
 135                                 goto NXTARG;
 136                         case 'f':
 137                                 if (--argc <= 0)
 138                                         usage ();
 139                                 datafile = *++argv;
 140                                 fflag = 1;
 141                                 goto NXTARG;
 142                         case 'n':
 143                                 if (--argc <= 0)
 144                                         usage ();
 145                                 name = *++argv;
 146                                 goto NXTARG;
 147                         case 'v':
 148                                 vflag++;
 149                                 break;
 150                         case 'x':
 151                                 xflag++;
 152                                 break;
 153                         default:
 154                                 usage ();
 155                         }
 156                 }
 157 NXTARG:         ;
 158         }
 159
 160         if ((argc != 1) ||
 161                 (dflag && (fflag || lflag)) ||
 162                 (fflag && (dflag || lflag)) ||
 163                 (lflag && (dflag || fflag)))
 164                 usage();
 165
 166         if (!eflag) {
 167                 ep = addr;
 168                 /* If XIP, entry point must be after the U-Boot header */
 169                 if (xflag)
 170                         ep += image_get_header_size ();
 171         }
 172
 173         /*
 174          * If XIP, ensure the entry point is equal to the load address plus
 175          * the size of the U-Boot header.
 176          */
 177         if (xflag) {
 178                 if (ep != addr + image_get_header_size ()) {
 179                         fprintf (stderr,
 180                                 "%s: For XIP, the entry point must be the load addr + %lu\n",
 181                                 cmdname,
 182                                 (unsigned long)image_get_header_size ());
 183                         exit (EXIT_FAILURE);
 184                 }
 185         }
 186
 187         imagefile = *argv;
 188
 189         if (!fflag){
 190                 if (lflag) {
 191                         ifd = open (imagefile, O_RDONLY|O_BINARY);
 192                 } else {
 193                         ifd = open (imagefile,
 194                                 O_RDWR|O_CREAT|O_TRUNC|O_BINARY, 0666);
 195                 }
 196
 197                 if (ifd < 0) {
 198                         fprintf (stderr, "%s: Can't open %s: %s\n",
 199                                 cmdname, imagefile, strerror(errno));
 200                         exit (EXIT_FAILURE);
 201                 }
 202         }
 203
 204         if (lflag) {
 205                 /*
 206                  * list header information of existing image
 207                  */
 208                 if (fstat(ifd, &sbuf) < 0) {
 209                         fprintf (stderr, "%s: Can't stat %s: %s\n",
 210                                 cmdname, imagefile, strerror(errno));
 211                         exit (EXIT_FAILURE);
 212                 }
 213
 214                 if ((unsigned)sbuf.st_size < image_get_header_size ()) {
 215                         fprintf (stderr,
 216                                 "%s: Bad size: \"%s\" is no valid image\n",
 217                                 cmdname, imagefile);
 218                         exit (EXIT_FAILURE);
 219                 }
 220
 221                 ptr = (unsigned char *)mmap(0, sbuf.st_size,
 222                                             PROT_READ, MAP_SHARED, ifd, 0);
 223                 if ((caddr_t)ptr == (caddr_t)-1) {
 224                         fprintf (stderr, "%s: Can't read %s: %s\n",
 225                                 cmdname, imagefile, strerror(errno));
 226                         exit (EXIT_FAILURE);
 227                 }
 228
 229                 if (fdt_check_header (ptr)) {
 230                         /* old-style image */
 231                         image_verify_header ((char *)ptr, sbuf.st_size);
 232                         image_print_contents_noindent ((image_header_t *)ptr);
 233                 } else {
 234                         /* FIT image */
 235                         fit_print_contents_noindent (ptr);
 236                 }
 237
 238                 (void) munmap((void *)ptr, sbuf.st_size);
 239                 (void) close (ifd);
 240
 241                 exit (EXIT_SUCCESS);
 242         } else if (fflag) {
 243                 /* Flattened Image Tree (FIT) format  handling */
 244                 debug ("FIT format handling\n");
 245                 fit_handle_file ();
 246                 exit (EXIT_SUCCESS);
 247         }
 248
 249         /*
 250          * Must be -w then:
 251          *
 252          * write dummy header, to be fixed later
 253          */
 254         memset (hdr, 0, image_get_header_size ());
 255
 256         if (write(ifd, hdr, image_get_header_size ()) != image_get_header_size ()) {
 257                 fprintf (stderr, "%s: Write error on %s: %s\n",
 258                         cmdname, imagefile, strerror(errno));
 259                 exit (EXIT_FAILURE);
 260         }
 261
 262         if (opt_type == IH_TYPE_MULTI || opt_type == IH_TYPE_SCRIPT) {
 263                 char *file = datafile;
 264                 uint32_t size;
 265
 266                 for (;;) {
 267                         char *sep = NULL;
 268
 269                         if (file) {
 270                                 if ((sep = strchr(file, ':')) != NULL) {
 271                                         *sep = '\0';
 272                                 }
 273
 274                                 if (stat (file, &sbuf) < 0) {
 275                                         fprintf (stderr, "%s: Can't stat %s: %s\n",
 276                                                 cmdname, file, strerror(errno));
 277                                         exit (EXIT_FAILURE);
 278                                 }
 279                                 size = cpu_to_uimage (sbuf.st_size);
 280                         } else {
 281                                 size = 0;
 282                         }
 283
 284                         if (write(ifd, (char *)&size, sizeof(size)) != sizeof(size)) {
 285                                 fprintf (stderr, "%s: Write error on %s: %s\n",
 286                                         cmdname, imagefile, strerror(errno));
 287                                 exit (EXIT_FAILURE);
 288                         }
 289
 290                         if (!file) {
 291                                 break;
 292                         }
 293
 294                         if (sep) {
 295                                 *sep = ':';
 296                                 file = sep + 1;
 297                         } else {
 298                                 file = NULL;
 299                         }
 300                 }
 301
 302                 file = datafile;
 303
 304                 for (;;) {
 305                         char *sep = strchr(file, ':');
 306                         if (sep) {
 307                                 *sep = '\0';
 308                                 copy_file (ifd, file, 1);
 309                                 *sep++ = ':';
 310                                 file = sep;
 311                         } else {
 312                                 copy_file (ifd, file, 0);
 313                                 break;
 314                         }
 315                 }
 316         } else {
 317                 copy_file (ifd, datafile, 0);
 318         }
 319
 320         /* We're a bit of paranoid */
 321 #if defined(_POSIX_SYNCHRONIZED_IO) && !defined(__sun__) && !defined(__FreeBSD__) && !defined(__APPLE__)
 322         (void) fdatasync (ifd);
 323 #else
 324         (void) fsync (ifd);
 325 #endif
 326
 327         if (fstat(ifd, &sbuf) < 0) {
 328                 fprintf (stderr, "%s: Can't stat %s: %s\n",
 329                         cmdname, imagefile, strerror(errno));
 330                 exit (EXIT_FAILURE);
 331         }
 332
 333         ptr = (unsigned char *)mmap(0, sbuf.st_size,
 334                                     PROT_READ|PROT_WRITE, MAP_SHARED, ifd, 0);
 335         if (ptr == (unsigned char *)MAP_FAILED) {
 336                 fprintf (stderr, "%s: Can't map %s: %s\n",
 337                         cmdname, imagefile, strerror(errno));
 338                 exit (EXIT_FAILURE);
 339         }
 340
 341         hdr = (image_header_t *)ptr;
 342
 343         checksum = crc32 (0,
 344                           (const char *)(ptr + image_get_header_size ()),
 345                           sbuf.st_size - image_get_header_size ()
 346                          );
 347
 348         /* Build new header */
 349         image_set_magic (hdr, IH_MAGIC);
 350         image_set_time (hdr, sbuf.st_mtime);
 351         image_set_size (hdr, sbuf.st_size - image_get_header_size ());
 352         image_set_load (hdr, addr);
 353         image_set_ep (hdr, ep);
 354         image_set_dcrc (hdr, checksum);
 355         image_set_os (hdr, opt_os);
 356         image_set_arch (hdr, opt_arch);
 357         image_set_type (hdr, opt_type);
 358         image_set_comp (hdr, opt_comp);
 359
 360         image_set_name (hdr, name);
 361
 362         checksum = crc32 (0, (const char *)hdr, image_get_header_size ());
 363
 364         image_set_hcrc (hdr, checksum);
 365
 366         image_print_contents_noindent (hdr);
 367
 368         (void) munmap((void *)ptr, sbuf.st_size);
 369
 370         /* We're a bit of paranoid */
 371 #if defined(_POSIX_SYNCHRONIZED_IO) && !defined(__sun__) && !defined(__FreeBSD__) && !defined(__APPLE__)
 372         (void) fdatasync (ifd);
 373 #else
 374         (void) fsync (ifd);
 375 #endif
 376
 377         if (close(ifd)) {
 378                 fprintf (stderr, "%s: Write error on %s: %s\n",
 379                         cmdname, imagefile, strerror(errno));
 380                 exit (EXIT_FAILURE);
 381         }
 382
 383         exit (EXIT_SUCCESS);
 384 }
 385
 386 static void
 387 copy_file (int ifd, const char *datafile, int pad)
 388 {
 389         int dfd;
 390         struct stat sbuf;
 391         unsigned char *ptr;
 392         int tail;
 393         int zero = 0;
 394         int offset = 0;
 395         int size;
 396
 397         if (vflag) {
 398                 fprintf (stderr, "Adding Image %s\n", datafile);
 399         }
 400
 401         if ((dfd = open(datafile, O_RDONLY|O_BINARY)) < 0) {
 402                 fprintf (stderr, "%s: Can't open %s: %s\n",
 403                         cmdname, datafile, strerror(errno));
 404                 exit (EXIT_FAILURE);
 405         }
 406
 407         if (fstat(dfd, &sbuf) < 0) {
 408                 fprintf (stderr, "%s: Can't stat %s: %s\n",
 409                         cmdname, datafile, strerror(errno));
 410                 exit (EXIT_FAILURE);
 411         }
 412
 413         ptr = (unsigned char *)mmap(0, sbuf.st_size,
 414                                     PROT_READ, MAP_SHARED, dfd, 0);
 415         if (ptr == (unsigned char *)MAP_FAILED) {
 416                 fprintf (stderr, "%s: Can't read %s: %s\n",
 417                         cmdname, datafile, strerror(errno));
 418                 exit (EXIT_FAILURE);
 419         }
 420
 421         if (xflag) {
 422                 unsigned char *p = NULL;
 423                 /*
 424                  * XIP: do not append the image_header_t at the
 425                  * beginning of the file, but consume the space
 426                  * reserved for it.
 427                  */
 428
 429                 if ((unsigned)sbuf.st_size < image_get_header_size ()) {
 430                         fprintf (stderr,
 431                                 "%s: Bad size: \"%s\" is too small for XIP\n",
 432                                 cmdname, datafile);
 433                         exit (EXIT_FAILURE);
 434                 }
 435
 436                 for (p = ptr; p < ptr + image_get_header_size (); p++) {
 437                         if ( *p != 0xff ) {
 438                                 fprintf (stderr,
 439                                         "%s: Bad file: \"%s\" has invalid buffer for XIP\n",
 440                                         cmdname, datafile);
 441                                 exit (EXIT_FAILURE);
 442                         }
 443                 }
 444
 445                 offset = image_get_header_size ();
 446         }
 447
 448         size = sbuf.st_size - offset;
 449         if (write(ifd, ptr + offset, size) != size) {
 450                 fprintf (stderr, "%s: Write error on %s: %s\n",
 451                         cmdname, imagefile, strerror(errno));
 452                 exit (EXIT_FAILURE);
 453         }
 454
 455         if (pad && ((tail = size % 4) != 0)) {
 456
 457                 if (write(ifd, (char *)&zero, 4-tail) != 4-tail) {
 458                         fprintf (stderr, "%s: Write error on %s: %s\n",
 459                                 cmdname, imagefile, strerror(errno));
 460                         exit (EXIT_FAILURE);
 461                 }
 462         }
 463
 464         (void) munmap((void *)ptr, sbuf.st_size);
 465         (void) close (dfd);
 466 }
 467
 468 void
 469 usage ()
 470 {
 471         fprintf (stderr, "Usage: %s -l image\n"
 472                          "          -l ==> list image header information\n",
 473                 cmdname);
 474         fprintf (stderr, "       %s [-x] -A arch -O os -T type -C comp "
 475                          "-a addr -e ep -n name -d data_file[:data_file...] image\n"
 476                          "          -A ==> set architecture to 'arch'\n"
 477                          "          -O ==> set operating system to 'os'\n"
 478                          "          -T ==> set image type to 'type'\n"
 479                          "          -C ==> set compression type 'comp'\n"
 480                          "          -a ==> set load address to 'addr' (hex)\n"
 481                          "          -e ==> set entry point to 'ep' (hex)\n"
 482                          "          -n ==> set image name to 'name'\n"
 483                          "          -d ==> use image data from 'datafile'\n"
 484                          "          -x ==> set XIP (execute in place)\n",
 485                 cmdname);
 486         fprintf (stderr, "       %s [-D dtc_options] -f fit-image.its fit-image\n",
 487                 cmdname);
 488
 489         exit (EXIT_FAILURE);
 490 }
 491
 492 static void
 493 image_verify_header (char *ptr, int image_size)
 494 {
 495         int len;
 496         char *data;
 497         uint32_t checksum;
 498         image_header_t header;
 499         image_header_t *hdr = &header;
 500
 501         /*
 502          * create copy of header so that we can blank out the
 503          * checksum field for checking - this can't be done
 504          * on the PROT_READ mapped data.
 505          */
 506         memcpy (hdr, ptr, sizeof(image_header_t));
 507
 508         if (ntohl(hdr->ih_magic) != IH_MAGIC) {
 509                 fprintf (stderr,
 510                         "%s: Bad Magic Number: \"%s\" is no valid image\n",
 511                         cmdname, imagefile);
 512                 exit (EXIT_FAILURE);
 513         }
 514
 515         data = (char *)hdr;
 516         len  = sizeof(image_header_t);
 517
 518         checksum = ntohl(hdr->ih_hcrc);
 519         hdr->ih_hcrc = htonl(0);        /* clear for re-calculation */
 520
 521         if (crc32 (0, data, len) != checksum) {
 522                 fprintf (stderr,
 523                         "%s: ERROR: \"%s\" has bad header checksum!\n",
 524                         cmdname, imagefile);
 525                 exit (EXIT_FAILURE);
 526         }
 527
 528         data = ptr + sizeof(image_header_t);
 529         len  = image_size - sizeof(image_header_t) ;
 530
 531         if (crc32 (0, data, len) != ntohl(hdr->ih_dcrc)) {
 532                 fprintf (stderr,
 533                         "%s: ERROR: \"%s\" has corrupted data!\n",
 534                         cmdname, imagefile);
 535                 exit (EXIT_FAILURE);
 536         }
 537 }
 538
 539 /**
 540  * fit_handle_file - main FIT file processing function
 541  *
 542  * fit_handle_file() runs dtc to convert .its to .itb, includes
 543  * binary data, updates timestamp property and calculates hashes.
 544  *
 545  * datafile  - .its file
 546  * imagefile - .itb file
 547  *
 548  * returns:
 549  *     only on success, otherwise calls exit (EXIT_FAILURE);
 550  */
 551 static void fit_handle_file (void)
 552 {
 553         char tmpfile[MKIMAGE_MAX_TMPFILE_LEN];
 554         char cmd[MKIMAGE_MAX_DTC_CMDLINE_LEN];
 555         int tfd;
 556         struct stat sbuf;
 557         unsigned char *ptr;
 558
 559         /* call dtc to include binary properties into the tmp file */
 560         if (strlen (imagefile) + strlen (MKIMAGE_TMPFILE_SUFFIX) + 1 >
 561                 sizeof (tmpfile)) {
 562                 fprintf (stderr, "%s: Image file name (%s) too long, "
 563                                 "can't create tmpfile",
 564                                 imagefile, cmdname);
 565                 exit (EXIT_FAILURE);
 566         }
 567         sprintf (tmpfile, "%s%s", imagefile, MKIMAGE_TMPFILE_SUFFIX);
 568
 569         /* dtc -I dts -O -p 200 datafile > tmpfile */
 570         sprintf (cmd, "%s %s %s > %s",
 571                         MKIMAGE_DTC, opt_dtc, datafile, tmpfile);
 572         debug ("Trying to execute \"%s\"\n", cmd);
 573         if (system (cmd) == -1) {
 574                 fprintf (stderr, "%s: system(%s) failed: %s\n",
 575                                 cmdname, cmd, strerror(errno));
 576                 unlink (tmpfile);
 577                 exit (EXIT_FAILURE);
 578         }
 579
 580         /* load FIT blob into memory */
 581         tfd = open (tmpfile, O_RDWR|O_BINARY);
 582
 583         if (tfd < 0) {
 584                 fprintf (stderr, "%s: Can't open %s: %s\n",
 585                                 cmdname, tmpfile, strerror(errno));
 586                 unlink (tmpfile);
 587                 exit (EXIT_FAILURE);
 588         }
 589
 590         if (fstat (tfd, &sbuf) < 0) {
 591                 fprintf (stderr, "%s: Can't stat %s: %s\n",
 592                                 cmdname, tmpfile, strerror(errno));
 593                 unlink (tmpfile);
 594                 exit (EXIT_FAILURE);
 595         }
 596
 597         ptr = (unsigned char *)mmap (0, sbuf.st_size,
 598                         PROT_READ|PROT_WRITE, MAP_SHARED, tfd, 0);
 599         if ((caddr_t)ptr == (caddr_t)-1) {
 600                 fprintf (stderr, "%s: Can't read %s: %s\n",
 601                                 cmdname, tmpfile, strerror(errno));
 602                 unlink (tmpfile);
 603                 exit (EXIT_FAILURE);
 604         }
 605
 606         /* check if ptr has a valid blob */
 607         if (fdt_check_header (ptr)) {
 608                 fprintf (stderr, "%s: Invalid FIT blob\n", cmdname);
 609                 unlink (tmpfile);
 610                 exit (EXIT_FAILURE);
 611         }
 612
 613         /* set hashes for images in the blob */
 614         if (fit_set_hashes (ptr)) {
 615                 fprintf (stderr, "%s Can't add hashes to FIT blob", cmdname);
 616                 unlink (tmpfile);
 617                 exit (EXIT_FAILURE);
 618         }
 619
 620         /* add a timestamp at offset 0 i.e., root  */
 621         if (fit_set_timestamp (ptr, 0, sbuf.st_mtime)) {
 622                 fprintf (stderr, "%s: Can't add image timestamp\n", cmdname);
 623                 unlink (tmpfile);
 624                 exit (EXIT_FAILURE);
 625         }
 626         debug ("Added timestamp successfully\n");
 627
 628         munmap ((void *)ptr, sbuf.st_size);
 629         close (tfd);
 630
 631         if (rename (tmpfile, imagefile) == -1) {
 632                 fprintf (stderr, "%s: Can't rename %s to %s: %s\n",
 633                                 cmdname, tmpfile, imagefile, strerror (errno));
 634                 unlink (tmpfile);
 635                 unlink (imagefile);
 636                 exit (EXIT_FAILURE);
 637         }
 638 }