tools/mkimage.c

   1 /*
   2  * (C) Copyright 2000-2004
   3  * DENX Software Engineering
   4  * Wolfgang Denk, wd@denx.de
   5  * All rights reserved.
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License as
   9  * published by the Free Software Foundation; either version 2 of
  10  * the License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  20  * MA 02111-1307 USA
  21  */
  22
  23 #include <errno.h>
  24 #include <fcntl.h>
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27 #include <string.h>
  28 #ifndef __WIN32__
  29 #include <netinet/in.h>         /* for host / network byte order conversions    */
  30 #endif
  31 #include <sys/mman.h>
  32 #include <sys/stat.h>
  33 #include <time.h>
  34 #include <unistd.h>
  35
  36 #if defined(__BEOS__) || defined(__NetBSD__) || defined(__APPLE__)
  37 #include <inttypes.h>
  38 #endif
  39
  40 #ifdef __WIN32__
  41 typedef unsigned int __u32;
  42
  43 #define SWAP_LONG(x) \
  44         ((__u32)( \
  45                 (((__u32)(x) & (__u32)0x000000ffUL) << 24) | \
  46                 (((__u32)(x) & (__u32)0x0000ff00UL) <<  8) | \
  47                 (((__u32)(x) & (__u32)0x00ff0000UL) >>  8) | \
  48                 (((__u32)(x) & (__u32)0xff000000UL) >> 24) ))
  49 typedef         unsigned char   uint8_t;
  50 typedef         unsigned short  uint16_t;
  51 typedef         unsigned int    uint32_t;
  52
  53 #define     ntohl(a)    SWAP_LONG(a)
  54 #define     htonl(a)    SWAP_LONG(a)
  55 #endif  /* __WIN32__ */
  56
  57 #ifndef O_BINARY                /* should be define'd on __WIN32__ */
  58 #define O_BINARY        0
  59 #endif
  60
  61 #include <image.h>
  62
  63 extern int errno;
  64
  65 #ifndef MAP_FAILED
  66 #define MAP_FAILED (-1)
  67 #endif
  68
  69 char *cmdname;
  70
  71 extern unsigned long crc32 (unsigned long crc, const char *buf, unsigned int len);
  72
  73 typedef struct table_entry {
  74         int     val;            /* as defined in image.h        */
  75         char    *sname;         /* short (input) name           */
  76         char    *lname;         /* long (output) name           */
  77 } table_entry_t;
  78
  79 table_entry_t arch_name[] = {
  80     {   IH_CPU_INVALID,         NULL,           "Invalid CPU",  },
  81     {   IH_CPU_ALPHA,           "alpha",        "Alpha",        },
  82     {   IH_CPU_ARM,             "arm",          "ARM",          },
  83     {   IH_CPU_I386,            "x86",          "Intel x86",    },
  84     {   IH_CPU_IA64,            "ia64",         "IA64",         },
  85     {   IH_CPU_M68K,            "m68k",         "MC68000",      },
  86     {   IH_CPU_MICROBLAZE,      "microblaze",   "MicroBlaze",   },
  87     {   IH_CPU_MIPS,            "mips",         "MIPS",         },
  88     {   IH_CPU_MIPS64,          "mips64",       "MIPS 64 Bit",  },
  89     {   IH_CPU_NIOS,            "nios",         "NIOS",         },
  90     {   IH_CPU_NIOS2,           "nios2",        "NIOS II",      },
  91     {   IH_CPU_PPC,             "ppc",          "PowerPC",      },
  92     {   IH_CPU_S390,            "s390",         "IBM S390",     },
  93     {   IH_CPU_SH,              "sh",           "SuperH",       },
  94     {   IH_CPU_SPARC,           "sparc",        "SPARC",        },
  95     {   IH_CPU_SPARC64,         "sparc64",      "SPARC 64 Bit", },
  96     {   IH_CPU_BLACKFIN,        "blackfin",     "Blackfin",     },
  97     {   -1,                     "",             "",             },
  98 };
  99
 100 table_entry_t os_name[] = {
 101     {   IH_OS_INVALID,  NULL,           "Invalid OS",           },
 102     {   IH_OS_4_4BSD,   "4_4bsd",       "4_4BSD",               },
 103     {   IH_OS_ARTOS,    "artos",        "ARTOS",                },
 104     {   IH_OS_DELL,     "dell",         "Dell",                 },
 105     {   IH_OS_ESIX,     "esix",         "Esix",                 },
 106     {   IH_OS_FREEBSD,  "freebsd",      "FreeBSD",              },
 107     {   IH_OS_IRIX,     "irix",         "Irix",                 },
 108     {   IH_OS_LINUX,    "linux",        "Linux",                },
 109     {   IH_OS_LYNXOS,   "lynxos",       "LynxOS",               },
 110     {   IH_OS_NCR,      "ncr",          "NCR",                  },
 111     {   IH_OS_NETBSD,   "netbsd",       "NetBSD",               },
 112     {   IH_OS_OPENBSD,  "openbsd",      "OpenBSD",              },
 113     {   IH_OS_PSOS,     "psos",         "pSOS",                 },
 114     {   IH_OS_QNX,      "qnx",          "QNX",                  },
 115     {   IH_OS_RTEMS,    "rtems",        "RTEMS",                },
 116     {   IH_OS_SCO,      "sco",          "SCO",                  },
 117     {   IH_OS_SOLARIS,  "solaris",      "Solaris",              },
 118     {   IH_OS_SVR4,     "svr4",         "SVR4",                 },
 119     {   IH_OS_U_BOOT,   "u-boot",       "U-Boot",               },
 120     {   IH_OS_VXWORKS,  "vxworks",      "VxWorks",              },
 121     {   -1,             "",             "",                     },
 122 };
 123
 124 table_entry_t type_name[] = {
 125     {   IH_TYPE_INVALID,    NULL,         "Invalid Image",      },
 126     {   IH_TYPE_FILESYSTEM, "filesystem", "Filesystem Image",   },
 127     {   IH_TYPE_FIRMWARE,   "firmware",   "Firmware",           },
 128     {   IH_TYPE_KERNEL,     "kernel",     "Kernel Image",       },
 129     {   IH_TYPE_MULTI,      "multi",      "Multi-File Image",   },
 130     {   IH_TYPE_RAMDISK,    "ramdisk",    "RAMDisk Image",      },
 131     {   IH_TYPE_SCRIPT,     "script",     "Script",             },
 132     {   IH_TYPE_STANDALONE, "standalone", "Standalone Program", },
 133     {   -1,                 "",           "",                   },
 134 };
 135
 136 table_entry_t comp_name[] = {
 137     {   IH_COMP_NONE,   "none",         "uncompressed",         },
 138     {   IH_COMP_BZIP2,  "bzip2",        "bzip2 compressed",     },
 139     {   IH_COMP_GZIP,   "gzip",         "gzip compressed",      },
 140     {   -1,             "",             "",                     },
 141 };
 142
 143 static  void    copy_file (int, const char *, int);
 144 static  void    usage   (void);
 145 static  void    print_header (image_header_t *);
 146 static  void    print_type (image_header_t *);
 147 static  char    *put_table_entry (table_entry_t *, char *, int);
 148 static  char    *put_arch (int);
 149 static  char    *put_type (int);
 150 static  char    *put_os   (int);
 151 static  char    *put_comp (int);
 152 static  int     get_table_entry (table_entry_t *, char *, char *);
 153 static  int     get_arch(char *);
 154 static  int     get_comp(char *);
 155 static  int     get_os  (char *);
 156 static  int     get_type(char *);
 157
 158
 159 char    *datafile;
 160 char    *imagefile;
 161
 162 int dflag    = 0;
 163 int eflag    = 0;
 164 int lflag    = 0;
 165 int vflag    = 0;
 166 int xflag    = 0;
 167 int opt_os   = IH_OS_LINUX;
 168 int opt_arch = IH_CPU_PPC;
 169 int opt_type = IH_TYPE_KERNEL;
 170 int opt_comp = IH_COMP_GZIP;
 171
 172 image_header_t header;
 173 image_header_t *hdr = &header;
 174
 175 int
 176 main (int argc, char **argv)
 177 {
 178         int ifd;
 179         uint32_t checksum;
 180         uint32_t addr;
 181         uint32_t ep;
 182         struct stat sbuf;
 183         unsigned char *ptr;
 184         char *name = "";
 185
 186         cmdname = *argv;
 187
 188         addr = ep = 0;
 189
 190         while (--argc > 0 && **++argv == '-') {
 191                 while (*++*argv) {
 192                         switch (**argv) {
 193                         case 'l':
 194                                 lflag = 1;
 195                                 break;
 196                         case 'A':
 197                                 if ((--argc <= 0) ||
 198                                     (opt_arch = get_arch(*++argv)) < 0)
 199                                         usage ();
 200                                 goto NXTARG;
 201                         case 'C':
 202                                 if ((--argc <= 0) ||
 203                                     (opt_comp = get_comp(*++argv)) < 0)
 204                                         usage ();
 205                                 goto NXTARG;
 206                         case 'O':
 207                                 if ((--argc <= 0) ||
 208                                     (opt_os = get_os(*++argv)) < 0)
 209                                         usage ();
 210                                 goto NXTARG;
 211                         case 'T':
 212                                 if ((--argc <= 0) ||
 213                                     (opt_type = get_type(*++argv)) < 0)
 214                                         usage ();
 215                                 goto NXTARG;
 216
 217                         case 'a':
 218                                 if (--argc <= 0)
 219                                         usage ();
 220                                 addr = strtoul (*++argv, (char **)&ptr, 16);
 221                                 if (*ptr) {
 222                                         fprintf (stderr,
 223                                                 "%s: invalid load address %s\n",
 224                                                 cmdname, *argv);
 225                                         exit (EXIT_FAILURE);
 226                                 }
 227                                 goto NXTARG;
 228                         case 'd':
 229                                 if (--argc <= 0)
 230                                         usage ();
 231                                 datafile = *++argv;
 232                                 dflag = 1;
 233                                 goto NXTARG;
 234                         case 'e':
 235                                 if (--argc <= 0)
 236                                         usage ();
 237                                 ep = strtoul (*++argv, (char **)&ptr, 16);
 238                                 if (*ptr) {
 239                                         fprintf (stderr,
 240                                                 "%s: invalid entry point %s\n",
 241                                                 cmdname, *argv);
 242                                         exit (EXIT_FAILURE);
 243                                 }
 244                                 eflag = 1;
 245                                 goto NXTARG;
 246                         case 'n':
 247                                 if (--argc <= 0)
 248                                         usage ();
 249                                 name = *++argv;
 250                                 goto NXTARG;
 251                         case 'v':
 252                                 vflag++;
 253                                 break;
 254                         case 'x':
 255                                 xflag++;
 256                                 break;
 257                         default:
 258                                 usage ();
 259                         }
 260                 }
 261 NXTARG:         ;
 262         }
 263
 264         if ((argc != 1) || ((lflag ^ dflag) == 0))
 265                 usage();
 266
 267         if (!eflag) {
 268                 ep = addr;
 269                 /* If XIP, entry point must be after the U-Boot header */
 270                 if (xflag)
 271                         ep += sizeof(image_header_t);
 272         }
 273
 274         /*
 275          * If XIP, ensure the entry point is equal to the load address plus
 276          * the size of the U-Boot header.
 277          */
 278         if (xflag) {
 279                 if (ep != addr + sizeof(image_header_t)) {
 280                         fprintf (stderr, "%s: For XIP, the entry point must be the load addr + %lu\n",
 281                                 cmdname,
 282                                 (unsigned long)sizeof(image_header_t));
 283                         exit (EXIT_FAILURE);
 284                 }
 285         }
 286
 287         imagefile = *argv;
 288
 289         if (lflag) {
 290                 ifd = open(imagefile, O_RDONLY|O_BINARY);
 291         } else {
 292                 ifd = open(imagefile, O_RDWR|O_CREAT|O_TRUNC|O_BINARY, 0666);
 293         }
 294
 295         if (ifd < 0) {
 296                 fprintf (stderr, "%s: Can't open %s: %s\n",
 297                         cmdname, imagefile, strerror(errno));
 298                 exit (EXIT_FAILURE);
 299         }
 300
 301         if (lflag) {
 302                 int len;
 303                 char *data;
 304                 /*
 305                  * list header information of existing image
 306                  */
 307                 if (fstat(ifd, &sbuf) < 0) {
 308                         fprintf (stderr, "%s: Can't stat %s: %s\n",
 309                                 cmdname, imagefile, strerror(errno));
 310                         exit (EXIT_FAILURE);
 311                 }
 312
 313                 if ((unsigned)sbuf.st_size < sizeof(image_header_t)) {
 314                         fprintf (stderr,
 315                                 "%s: Bad size: \"%s\" is no valid image\n",
 316                                 cmdname, imagefile);
 317                         exit (EXIT_FAILURE);
 318                 }
 319
 320                 ptr = (unsigned char *)mmap(0, sbuf.st_size,
 321                                             PROT_READ, MAP_SHARED, ifd, 0);
 322                 if ((caddr_t)ptr == (caddr_t)-1) {
 323                         fprintf (stderr, "%s: Can't read %s: %s\n",
 324                                 cmdname, imagefile, strerror(errno));
 325                         exit (EXIT_FAILURE);
 326                 }
 327
 328                 /*
 329                  * create copy of header so that we can blank out the
 330                  * checksum field for checking - this can't be done
 331                  * on the PROT_READ mapped data.
 332                  */
 333                 memcpy (hdr, ptr, sizeof(image_header_t));
 334
 335                 if (ntohl(hdr->ih_magic) != IH_MAGIC) {
 336                         fprintf (stderr,
 337                                 "%s: Bad Magic Number: \"%s\" is no valid image\n",
 338                                 cmdname, imagefile);
 339                         exit (EXIT_FAILURE);
 340                 }
 341
 342                 data = (char *)hdr;
 343                 len  = sizeof(image_header_t);
 344
 345                 checksum = ntohl(hdr->ih_hcrc);
 346                 hdr->ih_hcrc = htonl(0);        /* clear for re-calculation */
 347
 348                 if (crc32 (0, data, len) != checksum) {
 349                         fprintf (stderr,
 350                                 "*** Warning: \"%s\" has bad header checksum!\n",
 351                                 imagefile);
 352                 }
 353
 354                 data = (char *)(ptr + sizeof(image_header_t));
 355                 len  = sbuf.st_size - sizeof(image_header_t) ;
 356
 357                 if (crc32 (0, data, len) != ntohl(hdr->ih_dcrc)) {
 358                         fprintf (stderr,
 359                                 "*** Warning: \"%s\" has corrupted data!\n",
 360                                 imagefile);
 361                 }
 362
 363                 /* for multi-file images we need the data part, too */
 364                 print_header ((image_header_t *)ptr);
 365
 366                 (void) munmap((void *)ptr, sbuf.st_size);
 367                 (void) close (ifd);
 368
 369                 exit (EXIT_SUCCESS);
 370         }
 371
 372         /*
 373          * Must be -w then:
 374          *
 375          * write dummy header, to be fixed later
 376          */
 377         memset (hdr, 0, sizeof(image_header_t));
 378
 379         if (write(ifd, hdr, sizeof(image_header_t)) != sizeof(image_header_t)) {
 380                 fprintf (stderr, "%s: Write error on %s: %s\n",
 381                         cmdname, imagefile, strerror(errno));
 382                 exit (EXIT_FAILURE);
 383         }
 384
 385         if (opt_type == IH_TYPE_MULTI || opt_type == IH_TYPE_SCRIPT) {
 386                 char *file = datafile;
 387                 uint32_t size;
 388
 389                 for (;;) {
 390                         char *sep = NULL;
 391
 392                         if (file) {
 393                                 if ((sep = strchr(file, ':')) != NULL) {
 394                                         *sep = '\0';
 395                                 }
 396
 397                                 if (stat (file, &sbuf) < 0) {
 398                                         fprintf (stderr, "%s: Can't stat %s: %s\n",
 399                                                 cmdname, file, strerror(errno));
 400                                         exit (EXIT_FAILURE);
 401                                 }
 402                                 size = htonl(sbuf.st_size);
 403                         } else {
 404                                 size = 0;
 405                         }
 406
 407                         if (write(ifd, (char *)&size, sizeof(size)) != sizeof(size)) {
 408                                 fprintf (stderr, "%s: Write error on %s: %s\n",
 409                                         cmdname, imagefile, strerror(errno));
 410                                 exit (EXIT_FAILURE);
 411                         }
 412
 413                         if (!file) {
 414                                 break;
 415                         }
 416
 417                         if (sep) {
 418                                 *sep = ':';
 419                                 file = sep + 1;
 420                         } else {
 421                                 file = NULL;
 422                         }
 423                 }
 424
 425                 file = datafile;
 426
 427                 for (;;) {
 428                         char *sep = strchr(file, ':');
 429                         if (sep) {
 430                                 *sep = '\0';
 431                                 copy_file (ifd, file, 1);
 432                                 *sep++ = ':';
 433                                 file = sep;
 434                         } else {
 435                                 copy_file (ifd, file, 0);
 436                                 break;
 437                         }
 438                 }
 439         } else {
 440                 copy_file (ifd, datafile, 0);
 441         }
 442
 443         /* We're a bit of paranoid */
 444 #if defined(_POSIX_SYNCHRONIZED_IO) && !defined(__sun__) && !defined(__FreeBSD__)
 445         (void) fdatasync (ifd);
 446 #else
 447         (void) fsync (ifd);
 448 #endif
 449
 450         if (fstat(ifd, &sbuf) < 0) {
 451                 fprintf (stderr, "%s: Can't stat %s: %s\n",
 452                         cmdname, imagefile, strerror(errno));
 453                 exit (EXIT_FAILURE);
 454         }
 455
 456         ptr = (unsigned char *)mmap(0, sbuf.st_size,
 457                                     PROT_READ|PROT_WRITE, MAP_SHARED, ifd, 0);
 458         if (ptr == (unsigned char *)MAP_FAILED) {
 459                 fprintf (stderr, "%s: Can't map %s: %s\n",
 460                         cmdname, imagefile, strerror(errno));
 461                 exit (EXIT_FAILURE);
 462         }
 463
 464         hdr = (image_header_t *)ptr;
 465
 466         checksum = crc32 (0,
 467                           (const char *)(ptr + sizeof(image_header_t)),
 468                           sbuf.st_size - sizeof(image_header_t)
 469                          );
 470
 471         /* Build new header */
 472         hdr->ih_magic = htonl(IH_MAGIC);
 473         hdr->ih_time  = htonl(sbuf.st_mtime);
 474         hdr->ih_size  = htonl(sbuf.st_size - sizeof(image_header_t));
 475         hdr->ih_load  = htonl(addr);
 476         hdr->ih_ep    = htonl(ep);
 477         hdr->ih_dcrc  = htonl(checksum);
 478         hdr->ih_os    = opt_os;
 479         hdr->ih_arch  = opt_arch;
 480         hdr->ih_type  = opt_type;
 481         hdr->ih_comp  = opt_comp;
 482
 483         strncpy((char *)hdr->ih_name, name, IH_NMLEN);
 484
 485         checksum = crc32(0,(const char *)hdr,sizeof(image_header_t));
 486
 487         hdr->ih_hcrc = htonl(checksum);
 488
 489         print_header (hdr);
 490
 491         (void) munmap((void *)ptr, sbuf.st_size);
 492
 493         /* We're a bit of paranoid */
 494 #if defined(_POSIX_SYNCHRONIZED_IO) && !defined(__sun__) && !defined(__FreeBSD__)
 495         (void) fdatasync (ifd);
 496 #else
 497         (void) fsync (ifd);
 498 #endif
 499
 500         if (close(ifd)) {
 501                 fprintf (stderr, "%s: Write error on %s: %s\n",
 502                         cmdname, imagefile, strerror(errno));
 503                 exit (EXIT_FAILURE);
 504         }
 505
 506         exit (EXIT_SUCCESS);
 507 }
 508
 509 static void
 510 copy_file (int ifd, const char *datafile, int pad)
 511 {
 512         int dfd;
 513         struct stat sbuf;
 514         unsigned char *ptr;
 515         int tail;
 516         int zero = 0;
 517         int offset = 0;
 518         int size;
 519
 520         if (vflag) {
 521                 fprintf (stderr, "Adding Image %s\n", datafile);
 522         }
 523
 524         if ((dfd = open(datafile, O_RDONLY|O_BINARY)) < 0) {
 525                 fprintf (stderr, "%s: Can't open %s: %s\n",
 526                         cmdname, datafile, strerror(errno));
 527                 exit (EXIT_FAILURE);
 528         }
 529
 530         if (fstat(dfd, &sbuf) < 0) {
 531                 fprintf (stderr, "%s: Can't stat %s: %s\n",
 532                         cmdname, datafile, strerror(errno));
 533                 exit (EXIT_FAILURE);
 534         }
 535
 536         ptr = (unsigned char *)mmap(0, sbuf.st_size,
 537                                     PROT_READ, MAP_SHARED, dfd, 0);
 538         if (ptr == (unsigned char *)MAP_FAILED) {
 539                 fprintf (stderr, "%s: Can't read %s: %s\n",
 540                         cmdname, datafile, strerror(errno));
 541                 exit (EXIT_FAILURE);
 542         }
 543
 544         if (xflag) {
 545                 unsigned char *p = NULL;
 546                 /*
 547                  * XIP: do not append the image_header_t at the
 548                  * beginning of the file, but consume the space
 549                  * reserved for it.
 550                  */
 551
 552                 if ((unsigned)sbuf.st_size < sizeof(image_header_t)) {
 553                         fprintf (stderr,
 554                                 "%s: Bad size: \"%s\" is too small for XIP\n",
 555                                 cmdname, datafile);
 556                         exit (EXIT_FAILURE);
 557                 }
 558
 559                 for (p=ptr; p < ptr+sizeof(image_header_t); p++) {
 560                         if ( *p != 0xff ) {
 561                                 fprintf (stderr,
 562                                         "%s: Bad file: \"%s\" has invalid buffer for XIP\n",
 563                                         cmdname, datafile);
 564                                 exit (EXIT_FAILURE);
 565                         }
 566                 }
 567
 568                 offset = sizeof(image_header_t);
 569         }
 570
 571         size = sbuf.st_size - offset;
 572         if (write(ifd, ptr + offset, size) != size) {
 573                 fprintf (stderr, "%s: Write error on %s: %s\n",
 574                         cmdname, imagefile, strerror(errno));
 575                 exit (EXIT_FAILURE);
 576         }
 577
 578         if (pad && ((tail = size % 4) != 0)) {
 579
 580                 if (write(ifd, (char *)&zero, 4-tail) != 4-tail) {
 581                         fprintf (stderr, "%s: Write error on %s: %s\n",
 582                                 cmdname, imagefile, strerror(errno));
 583                         exit (EXIT_FAILURE);
 584                 }
 585         }
 586
 587         (void) munmap((void *)ptr, sbuf.st_size);
 588         (void) close (dfd);
 589 }
 590
 591 void
 592 usage ()
 593 {
 594         fprintf (stderr, "Usage: %s -l image\n"
 595                          "          -l ==> list image header information\n"
 596                          "       %s [-x] -A arch -O os -T type -C comp "
 597                          "-a addr -e ep -n name -d data_file[:data_file...] image\n",
 598                 cmdname, cmdname);
 599         fprintf (stderr, "          -A ==> set architecture to 'arch'\n"
 600                          "          -O ==> set operating system to 'os'\n"
 601                          "          -T ==> set image type to 'type'\n"
 602                          "          -C ==> set compression type 'comp'\n"
 603                          "          -a ==> set load address to 'addr' (hex)\n"
 604                          "          -e ==> set entry point to 'ep' (hex)\n"
 605                          "          -n ==> set image name to 'name'\n"
 606                          "          -d ==> use image data from 'datafile'\n"
 607                          "          -x ==> set XIP (execute in place)\n"
 608                 );
 609         exit (EXIT_FAILURE);
 610 }
 611
 612 static void
 613 print_header (image_header_t *hdr)
 614 {
 615         time_t timestamp;
 616         uint32_t size;
 617
 618         timestamp = (time_t)ntohl(hdr->ih_time);
 619         size = ntohl(hdr->ih_size);
 620
 621         printf ("Image Name:   %.*s\n", IH_NMLEN, hdr->ih_name);
 622         printf ("Created:      %s", ctime(&timestamp));
 623         printf ("Image Type:   "); print_type(hdr);
 624         printf ("Data Size:    %d Bytes = %.2f kB = %.2f MB\n",
 625                 size, (double)size / 1.024e3, (double)size / 1.048576e6 );
 626         printf ("Load Address: 0x%08X\n", ntohl(hdr->ih_load));
 627         printf ("Entry Point:  0x%08X\n", ntohl(hdr->ih_ep));
 628
 629         if (hdr->ih_type == IH_TYPE_MULTI || hdr->ih_type == IH_TYPE_SCRIPT) {
 630                 int i, ptrs;
 631                 uint32_t pos;
 632                 unsigned long *len_ptr = (unsigned long *) (
 633                                         (unsigned long)hdr + sizeof(image_header_t)
 634                                 );
 635
 636                 /* determine number of images first (to calculate image offsets) */
 637                 for (i=0; len_ptr[i]; ++i)      /* null pointer terminates list */
 638                         ;
 639                 ptrs = i;               /* null pointer terminates list */
 640
 641                 pos = sizeof(image_header_t) + ptrs * sizeof(long);
 642                 printf ("Contents:\n");
 643                 for (i=0; len_ptr[i]; ++i) {
 644                         size = ntohl(len_ptr[i]);
 645
 646                         printf ("   Image %d: %8d Bytes = %4d kB = %d MB\n",
 647                                 i, size, size>>10, size>>20);
 648                         if (hdr->ih_type == IH_TYPE_SCRIPT && i > 0) {
 649                                 /*
 650                                  * the user may need to know offsets
 651                                  * if planning to do something with
 652                                  * multiple files
 653                                  */
 654                                 printf ("    Offset = %08X\n", pos);
 655                         }
 656                         /* copy_file() will pad the first files to even word align */
 657                         size += 3;
 658                         size &= ~3;
 659                         pos += size;
 660                 }
 661         }
 662 }
 663
 664
 665 static void
 666 print_type (image_header_t *hdr)
 667 {
 668         printf ("%s %s %s (%s)\n",
 669                 put_arch (hdr->ih_arch),
 670                 put_os   (hdr->ih_os  ),
 671                 put_type (hdr->ih_type),
 672                 put_comp (hdr->ih_comp)
 673         );
 674 }
 675
 676 static char *put_arch (int arch)
 677 {
 678         return (put_table_entry(arch_name, "Unknown Architecture", arch));
 679 }
 680
 681 static char *put_os (int os)
 682 {
 683         return (put_table_entry(os_name, "Unknown OS", os));
 684 }
 685
 686 static char *put_type (int type)
 687 {
 688         return (put_table_entry(type_name, "Unknown Image", type));
 689 }
 690
 691 static char *put_comp (int comp)
 692 {
 693         return (put_table_entry(comp_name, "Unknown Compression", comp));
 694 }
 695
 696 static char *put_table_entry (table_entry_t *table, char *msg, int type)
 697 {
 698         for (; table->val>=0; ++table) {
 699                 if (table->val == type)
 700                         return (table->lname);
 701         }
 702         return (msg);
 703 }
 704
 705 static int get_arch(char *name)
 706 {
 707         return (get_table_entry(arch_name, "CPU", name));
 708 }
 709
 710
 711 static int get_comp(char *name)
 712 {
 713         return (get_table_entry(comp_name, "Compression", name));
 714 }
 715
 716
 717 static int get_os (char *name)
 718 {
 719         return (get_table_entry(os_name, "OS", name));
 720 }
 721
 722
 723 static int get_type(char *name)
 724 {
 725         return (get_table_entry(type_name, "Image", name));
 726 }
 727
 728 static int get_table_entry (table_entry_t *table, char *msg, char *name)
 729 {
 730         table_entry_t *t;
 731         int first = 1;
 732
 733         for (t=table; t->val>=0; ++t) {
 734                 if (t->sname && strcasecmp(t->sname, name)==0)
 735                         return (t->val);
 736         }
 737         fprintf (stderr, "\nInvalid %s Type - valid names are", msg);
 738         for (t=table; t->val>=0; ++t) {
 739                 if (t->sname == NULL)
 740                         continue;
 741                 fprintf (stderr, "%c %s", (first) ? ':' : ',', t->sname);
 742                 first = 0;
 743         }
 744         fprintf (stderr, "\n");
 745         return (-1);
 746 }