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