tools/mkimage.c

   1 /*
   2  * (C) Copyright 2000-2002
   3  * DENX Software Engineering
   4  * Wolfgang Denk, wd@denx.de
   5  * All rights reserved.
   6  */
   7
   8 #include <errno.h>
   9 #include <fcntl.h>
  10 #include <stdio.h>
  11 #include <stdlib.h>
  12 #include <string.h>
  13 #ifndef __WIN32__
  14 #include <netinet/in.h>         /* for host / network byte order conversions    */
  15 #endif
  16 #include <sys/mman.h>
  17 #include <sys/stat.h>
  18 #include <time.h>
  19 #include <unistd.h>
  20
  21 #if defined(__BEOS__) || defined(__NetBSD__) || defined(__APPLE__)
  22 #include <inttypes.h>
  23 #endif
  24
  25 #ifdef __WIN32__
  26 typedef unsigned int __u32;
  27
  28 #define SWAP_LONG(x) \
  29         ((__u32)( \
  30                 (((__u32)(x) & (__u32)0x000000ffUL) << 24) | \
  31                 (((__u32)(x) & (__u32)0x0000ff00UL) <<  8) | \
  32                 (((__u32)(x) & (__u32)0x00ff0000UL) >>  8) | \
  33                 (((__u32)(x) & (__u32)0xff000000UL) >> 24) ))
  34 typedef         unsigned char   uint8_t;
  35 typedef         unsigned short  uint16_t;
  36 typedef         unsigned int    uint32_t;
  37
  38 #define     ntohl(a)    SWAP_LONG(a)
  39 #define     htonl(a)    SWAP_LONG(a)
  40 #endif  /* __WIN32__ */
  41
  42 #include <image.h>
  43
  44 extern int errno;
  45
  46 #ifndef MAP_FAILED
  47 #define MAP_FAILED (-1)
  48 #endif
  49
  50 char *cmdname;
  51
  52 extern unsigned long crc32 (unsigned long crc, const char *buf, unsigned int len);
  53
  54 typedef struct table_entry {
  55         int     val;            /* as defined in image.h        */
  56         char    *sname;         /* short (input) name           */
  57         char    *lname;         /* long (output) name           */
  58 } table_entry_t;
  59
  60 table_entry_t arch_name[] = {
  61     {   IH_CPU_INVALID, NULL,           "Invalid CPU",          },
  62     {   IH_CPU_ALPHA,   "alpha",        "Alpha",                },
  63     {   IH_CPU_ARM,     "arm",          "ARM",                  },
  64     {   IH_CPU_I386,    "x86",          "Intel x86",            },
  65     {   IH_CPU_IA64,    "ia64",         "IA64",                 },
  66     {   IH_CPU_MIPS,    "mips",         "MIPS",                 },
  67     {   IH_CPU_MIPS64,  "mips64",       "MIPS 64 Bit",          },
  68     {   IH_CPU_PPC,     "ppc",          "PowerPC",              },
  69     {   IH_CPU_S390,    "s390",         "IBM S390",             },
  70     {   IH_CPU_SH,      "sh",           "SuperH",               },
  71     {   IH_CPU_SPARC,   "sparc",        "SPARC",                },
  72     {   IH_CPU_SPARC64, "sparc64",      "SPARC 64 Bit",         },
  73     {   -1,             "",             "",                     },
  74 };
  75
  76 table_entry_t os_name[] = {
  77     {   IH_OS_INVALID,  NULL,           "Invalid OS",           },
  78     {   IH_OS_OPENBSD,  "openbsd",      "OpenBSD",              },
  79     {   IH_OS_NETBSD,   "netbsd",       "NetBSD",               },
  80     {   IH_OS_FREEBSD,  "freebsd",      "FreeBSD",              },
  81     {   IH_OS_4_4BSD,   "4_4bsd",       "4_4BSD",               },
  82     {   IH_OS_LINUX,    "linux",        "Linux",                },
  83     {   IH_OS_SVR4,     "svr4",         "SVR4",                 },
  84     {   IH_OS_ESIX,     "esix",         "Esix",                 },
  85     {   IH_OS_SOLARIS,  "solaris",      "Solaris",              },
  86     {   IH_OS_IRIX,     "irix",         "Irix",                 },
  87     {   IH_OS_SCO,      "sco",          "SCO",                  },
  88     {   IH_OS_DELL,     "dell",         "Dell",                 },
  89     {   IH_OS_NCR,      "ncr",          "NCR",                  },
  90     {   IH_OS_LYNXOS,   "lynxos",       "LynxOS",               },
  91     {   IH_OS_VXWORKS,  "vxworks",      "VxWorks",              },
  92     {   IH_OS_PSOS,     "psos",         "pSOS",                 },
  93     {   IH_OS_QNX,      "qnx",          "QNX",                  },
  94     {   IH_OS_U_BOOT,   "u-boot",       "U-Boot",               },
  95     {   IH_OS_RTEMS,    "rtems",        "RTEMS",                },
  96     {   IH_OS_ARTOS,    "artos",        "ARTOS",                },
  97     {   -1,             "",             "",                     },
  98 };
  99
 100 table_entry_t type_name[] = {
 101     {   IH_TYPE_INVALID,    NULL,         "Invalid Image",      },
 102     {   IH_TYPE_STANDALONE, "standalone", "Standalone Program", },
 103     {   IH_TYPE_KERNEL,     "kernel",     "Kernel Image",       },
 104     {   IH_TYPE_RAMDISK,    "ramdisk",    "RAMDisk Image",      },
 105     {   IH_TYPE_MULTI,      "multi",      "Multi-File Image",   },
 106     {   IH_TYPE_FIRMWARE,   "firmware",   "Firmware",           },
 107     {   IH_TYPE_SCRIPT,     "script",     "Script",             },
 108     {   -1,                 "",           "",                   },
 109 };
 110
 111 table_entry_t comp_name[] = {
 112     {   IH_COMP_NONE,   "none",         "uncompressed",         },
 113     {   IH_COMP_GZIP,   "gzip",         "gzip compressed",      },
 114     {   IH_COMP_BZIP2,  "bzip2",        "bzip2 compressed",     },
 115     {   -1,             "",             "",                     },
 116 };
 117
 118 static  void    copy_file (int, const char *, int);
 119 static  void    usage   (void);
 120 static  void    print_header (image_header_t *);
 121 static  void    print_type (image_header_t *);
 122 static  char    *put_table_entry (table_entry_t *, char *, int);
 123 static  char    *put_arch (int);
 124 static  char    *put_type (int);
 125 static  char    *put_os   (int);
 126 static  char    *put_comp (int);
 127 static  int     get_table_entry (table_entry_t *, char *, char *);
 128 static  int     get_arch(char *);
 129 static  int     get_comp(char *);
 130 static  int     get_os  (char *);
 131 static  int     get_type(char *);
 132
 133
 134 char    *datafile;
 135 char    *imagefile;
 136
 137 int dflag    = 0;
 138 int eflag    = 0;
 139 int lflag    = 0;
 140 int vflag    = 0;
 141 int xflag    = 0;
 142 int opt_os   = IH_OS_LINUX;
 143 int opt_arch = IH_CPU_PPC;
 144 int opt_type = IH_TYPE_KERNEL;
 145 int opt_comp = IH_COMP_GZIP;
 146
 147 image_header_t header;
 148 image_header_t *hdr = &header;
 149
 150 int
 151 main (int argc, char **argv)
 152 {
 153         int ifd;
 154         uint32_t checksum;
 155         uint32_t addr;
 156         uint32_t ep;
 157         struct stat sbuf;
 158         unsigned char *ptr;
 159         char *name = "";
 160
 161         cmdname = *argv;
 162
 163         addr = ep = 0;
 164
 165         while (--argc > 0 && **++argv == '-') {
 166                 while (*++*argv) {
 167                         switch (**argv) {
 168                         case 'l':
 169                                 lflag = 1;
 170                                 break;
 171                         case 'A':
 172                                 if ((--argc <= 0) ||
 173                                     (opt_arch = get_arch(*++argv)) < 0)
 174                                         usage ();
 175                                 goto NXTARG;
 176                         case 'C':
 177                                 if ((--argc <= 0) ||
 178                                     (opt_comp = get_comp(*++argv)) < 0)
 179                                         usage ();
 180                                 goto NXTARG;
 181                         case 'O':
 182                                 if ((--argc <= 0) ||
 183                                     (opt_os = get_os(*++argv)) < 0)
 184                                         usage ();
 185                                 goto NXTARG;
 186                         case 'T':
 187                                 if ((--argc <= 0) ||
 188                                     (opt_type = get_type(*++argv)) < 0)
 189                                         usage ();
 190                                 goto NXTARG;
 191
 192                         case 'a':
 193                                 if (--argc <= 0)
 194                                         usage ();
 195                                 addr = strtoul (*++argv, (char **)&ptr, 16);
 196                                 if (*ptr) {
 197                                         fprintf (stderr,
 198                                                 "%s: invalid load address %s\n",
 199                                                 cmdname, *argv);
 200                                         exit (EXIT_FAILURE);
 201                                 }
 202                                 goto NXTARG;
 203                         case 'd':
 204                                 if (--argc <= 0)
 205                                         usage ();
 206                                 datafile = *++argv;
 207                                 dflag = 1;
 208                                 goto NXTARG;
 209                         case 'e':
 210                                 if (--argc <= 0)
 211                                         usage ();
 212                                 ep = strtoul (*++argv, (char **)&ptr, 16);
 213                                 if (*ptr) {
 214                                         fprintf (stderr,
 215                                                 "%s: invalid entry point %s\n",
 216                                                 cmdname, *argv);
 217                                         exit (EXIT_FAILURE);
 218                                 }
 219                                 eflag = 1;
 220                                 goto NXTARG;
 221                         case 'n':
 222                                 if (--argc <= 0)
 223                                         usage ();
 224                                 name = *++argv;
 225                                 goto NXTARG;
 226                         case 'v':
 227                                 vflag++;
 228                                 break;
 229                         case 'x':
 230                                 xflag++;
 231                                 break;
 232                         default:
 233                                 usage ();
 234                         }
 235                 }
 236 NXTARG:         ;
 237         }
 238
 239         if ((argc != 1) || ((lflag ^ dflag) == 0))
 240                 usage();
 241
 242         if (!eflag) {
 243                 ep = addr;
 244                 /* If XIP, entry point must be after the U-Boot header */
 245                 if (xflag)
 246                         ep += sizeof(image_header_t);
 247         }
 248
 249         /*
 250          * If XIP, ensure the entry point is equal to the load address plus
 251          * the size of the U-Boot header.
 252          */
 253         if (xflag) {
 254                 if (ep != addr + sizeof(image_header_t)) {
 255                         fprintf (stderr, "%s: For XIP, the entry point must be the load addr + %lu\n",
 256                                 cmdname,
 257                                 (unsigned long)sizeof(image_header_t));
 258                         exit (EXIT_FAILURE);
 259                 }
 260         }
 261
 262         imagefile = *argv;
 263
 264         if (lflag) {
 265                 ifd = open(imagefile, O_RDONLY);
 266         } else {
 267 #ifdef __WIN32__
 268                 ifd = open(imagefile, O_RDWR|O_CREAT|O_TRUNC|O_BINARY, 0666);
 269 #else
 270                 ifd = open(imagefile, O_RDWR|O_CREAT|O_TRUNC, 0666);
 271 #endif
 272         }
 273
 274         if (ifd < 0) {
 275                 fprintf (stderr, "%s: Can't open %s: %s\n",
 276                         cmdname, imagefile, strerror(errno));
 277                 exit (EXIT_FAILURE);
 278         }
 279
 280         if (lflag) {
 281                 int len;
 282                 char *data;
 283                 /*
 284                  * list header information of existing image
 285                  */
 286                 if (fstat(ifd, &sbuf) < 0) {
 287                         fprintf (stderr, "%s: Can't stat %s: %s\n",
 288                                 cmdname, imagefile, strerror(errno));
 289                         exit (EXIT_FAILURE);
 290                 }
 291
 292                 if (sbuf.st_size < sizeof(image_header_t)) {
 293                         fprintf (stderr,
 294                                 "%s: Bad size: \"%s\" is no valid image\n",
 295                                 cmdname, imagefile);
 296                         exit (EXIT_FAILURE);
 297                 }
 298
 299                 ptr = (unsigned char *)mmap(0, sbuf.st_size,
 300                                             PROT_READ, MAP_SHARED, ifd, 0);
 301                 if ((caddr_t)ptr == (caddr_t)-1) {
 302                         fprintf (stderr, "%s: Can't read %s: %s\n",
 303                                 cmdname, imagefile, strerror(errno));
 304                         exit (EXIT_FAILURE);
 305                 }
 306
 307                 /*
 308                  * create copy of header so that we can blank out the
 309                  * checksum field for checking - this can't be done
 310                  * on the PROT_READ mapped data.
 311                  */
 312                 memcpy (hdr, ptr, sizeof(image_header_t));
 313
 314                 if (ntohl(hdr->ih_magic) != IH_MAGIC) {
 315                         fprintf (stderr,
 316                                 "%s: Bad Magic Number: \"%s\" is no valid image\n",
 317                                 cmdname, imagefile);
 318                         exit (EXIT_FAILURE);
 319                 }
 320
 321                 data = (char *)hdr;
 322                 len  = sizeof(image_header_t);
 323
 324                 checksum = ntohl(hdr->ih_hcrc);
 325                 hdr->ih_hcrc = htonl(0);        /* clear for re-calculation */
 326
 327                 if (crc32 (0, data, len) != checksum) {
 328                         fprintf (stderr,
 329                                 "*** Warning: \"%s\" has bad header checksum!\n",
 330                                 imagefile);
 331                 }
 332
 333                 data = (char *)(ptr + sizeof(image_header_t));
 334                 len  = sbuf.st_size - sizeof(image_header_t) ;
 335
 336                 if (crc32 (0, data, len) != ntohl(hdr->ih_dcrc)) {
 337                         fprintf (stderr,
 338                                 "*** Warning: \"%s\" has corrupted data!\n",
 339                                 imagefile);
 340                 }
 341
 342                 /* for multi-file images we need the data part, too */
 343                 print_header ((image_header_t *)ptr);
 344
 345                 (void) munmap((void *)ptr, sbuf.st_size);
 346                 (void) close (ifd);
 347
 348                 exit (EXIT_SUCCESS);
 349         }
 350
 351         /*
 352          * Must be -w then:
 353          *
 354          * write dummy header, to be fixed later
 355          */
 356         memset (hdr, 0, sizeof(image_header_t));
 357
 358         if (write(ifd, hdr, sizeof(image_header_t)) != sizeof(image_header_t)) {
 359                 fprintf (stderr, "%s: Write error on %s: %s\n",
 360                         cmdname, imagefile, strerror(errno));
 361                 exit (EXIT_FAILURE);
 362         }
 363
 364         if (opt_type == IH_TYPE_MULTI || opt_type == IH_TYPE_SCRIPT) {
 365                 char *file = datafile;
 366                 unsigned long size;
 367
 368                 for (;;) {
 369                         char *sep = NULL;
 370
 371                         if (file) {
 372                                 if ((sep = strchr(file, ':')) != NULL) {
 373                                         *sep = '\0';
 374                                 }
 375
 376                                 if (stat (file, &sbuf) < 0) {
 377                                         fprintf (stderr, "%s: Can't stat %s: %s\n",
 378                                                 cmdname, file, strerror(errno));
 379                                         exit (EXIT_FAILURE);
 380                                 }
 381                                 size = htonl(sbuf.st_size);
 382                         } else {
 383                                 size = 0;
 384                         }
 385
 386                         if (write(ifd, (char *)&size, sizeof(size)) != sizeof(size)) {
 387                                 fprintf (stderr, "%s: Write error on %s: %s\n",
 388                                         cmdname, imagefile, strerror(errno));
 389                                 exit (EXIT_FAILURE);
 390                         }
 391
 392                         if (!file) {
 393                                 break;
 394                         }
 395
 396                         if (sep) {
 397                                 *sep = ':';
 398                                 file = sep + 1;
 399                         } else {
 400                                 file = NULL;
 401                         }
 402                 }
 403
 404                 file = datafile;
 405
 406                 for (;;) {
 407                         char *sep = strchr(file, ':');
 408                         if (sep) {
 409                                 *sep = '\0';
 410                                 copy_file (ifd, file, 1);
 411                                 *sep++ = ':';
 412                                 file = sep;
 413                         } else {
 414                                 copy_file (ifd, file, 0);
 415                                 break;
 416                         }
 417                 }
 418         } else {
 419                 copy_file (ifd, datafile, 0);
 420         }
 421
 422         /* We're a bit of paranoid */
 423 #if defined(_POSIX_SYNCHRONIZED_IO) && !defined(__sun__)
 424         (void) fdatasync (ifd);
 425 #else
 426         (void) fsync (ifd);
 427 #endif
 428
 429         if (fstat(ifd, &sbuf) < 0) {
 430                 fprintf (stderr, "%s: Can't stat %s: %s\n",
 431                         cmdname, imagefile, strerror(errno));
 432                 exit (EXIT_FAILURE);
 433         }
 434
 435         ptr = (unsigned char *)mmap(0, sbuf.st_size,
 436                                     PROT_READ|PROT_WRITE, MAP_SHARED, ifd, 0);
 437         if (ptr == (unsigned char *)MAP_FAILED) {
 438                 fprintf (stderr, "%s: Can't map %s: %s\n",
 439                         cmdname, imagefile, strerror(errno));
 440                 exit (EXIT_FAILURE);
 441         }
 442
 443         hdr = (image_header_t *)ptr;
 444
 445         checksum = crc32 (0,
 446                           (const char *)(ptr + sizeof(image_header_t)),
 447                           sbuf.st_size - sizeof(image_header_t)
 448                          );
 449
 450         /* Build new header */
 451         hdr->ih_magic = htonl(IH_MAGIC);
 452         hdr->ih_time  = htonl(sbuf.st_mtime);
 453         hdr->ih_size  = htonl(sbuf.st_size - sizeof(image_header_t));
 454         hdr->ih_load  = htonl(addr);
 455         hdr->ih_ep    = htonl(ep);
 456         hdr->ih_dcrc  = htonl(checksum);
 457         hdr->ih_os    = opt_os;
 458         hdr->ih_arch  = opt_arch;
 459         hdr->ih_type  = opt_type;
 460         hdr->ih_comp  = opt_comp;
 461
 462         strncpy((char *)hdr->ih_name, name, IH_NMLEN);
 463
 464         checksum = crc32(0,(const char *)hdr,sizeof(image_header_t));
 465
 466         hdr->ih_hcrc = htonl(checksum);
 467
 468         print_header (hdr);
 469
 470         (void) munmap((void *)ptr, sbuf.st_size);
 471
 472         /* We're a bit of paranoid */
 473 #if defined(_POSIX_SYNCHRONIZED_IO) && !defined(__sun__)
 474         (void) fdatasync (ifd);
 475 #else
 476         (void) fsync (ifd);
 477 #endif
 478
 479         if (close(ifd)) {
 480                 fprintf (stderr, "%s: Write error on %s: %s\n",
 481                         cmdname, imagefile, strerror(errno));
 482                 exit (EXIT_FAILURE);
 483         }
 484
 485         exit (EXIT_SUCCESS);
 486 }
 487
 488 static void
 489 copy_file (int ifd, const char *datafile, int pad)
 490 {
 491         int dfd;
 492         struct stat sbuf;
 493         unsigned char *ptr;
 494         int tail;
 495         int zero = 0;
 496         int offset = 0;
 497         int size;
 498
 499         if (vflag) {
 500                 fprintf (stderr, "Adding Image %s\n", datafile);
 501         }
 502
 503         if ((dfd = open(datafile, O_RDONLY)) < 0) {
 504                 fprintf (stderr, "%s: Can't open %s: %s\n",
 505                         cmdname, datafile, strerror(errno));
 506                 exit (EXIT_FAILURE);
 507         }
 508
 509         if (fstat(dfd, &sbuf) < 0) {
 510                 fprintf (stderr, "%s: Can't stat %s: %s\n",
 511                         cmdname, datafile, strerror(errno));
 512                 exit (EXIT_FAILURE);
 513         }
 514
 515         ptr = (unsigned char *)mmap(0, sbuf.st_size,
 516                                     PROT_READ, MAP_SHARED, dfd, 0);
 517         if (ptr == (unsigned char *)MAP_FAILED) {
 518                 fprintf (stderr, "%s: Can't read %s: %s\n",
 519                         cmdname, datafile, strerror(errno));
 520                 exit (EXIT_FAILURE);
 521         }
 522
 523         if (xflag) {
 524                 unsigned char *p = NULL;
 525                 /*
 526                  * XIP: do not append the image_header_t at the
 527                  * beginning of the file, but consume the space
 528                  * reserved for it.
 529                  */
 530
 531                 if (sbuf.st_size < sizeof(image_header_t)) {
 532                         fprintf (stderr,
 533                                 "%s: Bad size: \"%s\" is too small for XIP\n",
 534                                 cmdname, datafile);
 535                         exit (EXIT_FAILURE);
 536                 }
 537
 538                 for (p=ptr; p < ptr+sizeof(image_header_t); p++) {
 539                         if ( *p != 0xff ) {
 540                                 fprintf (stderr,
 541                                         "%s: Bad file: \"%s\" has invalid buffer for XIP\n",
 542                                         cmdname, datafile);
 543                                 exit (EXIT_FAILURE);
 544                         }
 545                 }
 546
 547                 offset = sizeof(image_header_t);
 548         }
 549
 550         size = sbuf.st_size - offset;
 551         if (write(ifd, ptr + offset, size) != size) {
 552                 fprintf (stderr, "%s: Write error on %s: %s\n",
 553                         cmdname, imagefile, strerror(errno));
 554                 exit (EXIT_FAILURE);
 555         }
 556
 557         if (pad && ((tail = size % 4) != 0)) {
 558
 559                 if (write(ifd, (char *)&zero, 4-tail) != 4-tail) {
 560                         fprintf (stderr, "%s: Write error on %s: %s\n",
 561                                 cmdname, imagefile, strerror(errno));
 562                         exit (EXIT_FAILURE);
 563                 }
 564         }
 565
 566         (void) munmap((void *)ptr, sbuf.st_size);
 567         (void) close (dfd);
 568 }
 569
 570 void
 571 usage ()
 572 {
 573         fprintf (stderr, "Usage: %s -l image\n"
 574                          "          -l ==> list image header information\n"
 575                          "       %s -A arch -O os -T type -C comp "
 576                          "-a addr -e ep -n name -d data_file[:data_file...] image\n",
 577                 cmdname, cmdname);
 578         fprintf (stderr, "          -A ==> set architecture to 'arch'\n"
 579                          "          -O ==> set operating system to 'os'\n"
 580                          "          -T ==> set image type to 'type'\n"
 581                          "          -C ==> set compression type 'comp'\n"
 582                          "          -a ==> set load address to 'addr' (hex)\n"
 583                          "          -e ==> set entry point to 'ep' (hex)\n"
 584                          "          -n ==> set image name to 'name'\n"
 585                          "          -d ==> use image data from 'datafile'\n"
 586                          "          -x ==> set XIP (execute in place)\n"
 587                 );
 588         exit (EXIT_FAILURE);
 589 }
 590
 591 static void
 592 print_header (image_header_t *hdr)
 593 {
 594         time_t timestamp;
 595         uint32_t size;
 596
 597         timestamp = (time_t)ntohl(hdr->ih_time);
 598         size = ntohl(hdr->ih_size);
 599
 600         printf ("Image Name:   %.*s\n", IH_NMLEN, hdr->ih_name);
 601         printf ("Created:      %s", ctime(&timestamp));
 602         printf ("Image Type:   "); print_type(hdr);
 603         printf ("Data Size:    %d Bytes = %.2f kB = %.2f MB\n",
 604                 size, (double)size / 1.024e3, (double)size / 1.048576e6 );
 605         printf ("Load Address: 0x%08x\n", ntohl(hdr->ih_load));
 606         printf ("Entry Point:  0x%08x\n", ntohl(hdr->ih_ep));
 607
 608         if (hdr->ih_type == IH_TYPE_MULTI || hdr->ih_type == IH_TYPE_SCRIPT) {
 609                 int i, ptrs;
 610                 uint32_t pos;
 611                 unsigned long *len_ptr = (unsigned long *) (
 612                                         (unsigned long)hdr + sizeof(image_header_t)
 613                                 );
 614
 615                 /* determine number of images first (to calculate image offsets) */
 616                 for (i=0; len_ptr[i]; ++i)      /* null pointer terminates list */
 617                         ;
 618                 ptrs = i;               /* null pointer terminates list */
 619
 620                 pos = sizeof(image_header_t) + ptrs * sizeof(long);
 621                 printf ("Contents:\n");
 622                 for (i=0; len_ptr[i]; ++i) {
 623                         size = ntohl(len_ptr[i]);
 624
 625                         printf ("   Image %d: %8d Bytes = %4d kB = %d MB\n",
 626                                 i, size, size>>10, size>>20);
 627                         if (hdr->ih_type == IH_TYPE_SCRIPT && i > 0) {
 628                                 /*
 629                                  * the user may need to know offsets
 630                                  * if planning to do something with
 631                                  * multiple files
 632                                  */
 633                                 printf ("    Offset = %08x\n", pos);
 634                         }
 635                         /* copy_file() will pad the first files to even word align */
 636                         size += 3;
 637                         size &= ~3;
 638                         pos += size;
 639                 }
 640         }
 641 }
 642
 643
 644 static void
 645 print_type (image_header_t *hdr)
 646 {
 647         printf ("%s %s %s (%s)\n",
 648                 put_arch (hdr->ih_arch),
 649                 put_os   (hdr->ih_os  ),
 650                 put_type (hdr->ih_type),
 651                 put_comp (hdr->ih_comp)
 652         );
 653 }
 654
 655 static char *put_arch (int arch)
 656 {
 657         return (put_table_entry(arch_name, "Unknown Architecture", arch));
 658 }
 659
 660 static char *put_os (int os)
 661 {
 662         return (put_table_entry(os_name, "Unknown OS", os));
 663 }
 664
 665 static char *put_type (int type)
 666 {
 667         return (put_table_entry(type_name, "Unknown Image", type));
 668 }
 669
 670 static char *put_comp (int comp)
 671 {
 672         return (put_table_entry(comp_name, "Unknown Compression", comp));
 673 }
 674
 675 static char *put_table_entry (table_entry_t *table, char *msg, int type)
 676 {
 677         for (; table->val>=0; ++table) {
 678                 if (table->val == type)
 679                         return (table->lname);
 680         }
 681         return (msg);
 682 }
 683
 684 static int get_arch(char *name)
 685 {
 686         return (get_table_entry(arch_name, "CPU", name));
 687 }
 688
 689
 690 static int get_comp(char *name)
 691 {
 692         return (get_table_entry(comp_name, "Compression", name));
 693 }
 694
 695
 696 static int get_os (char *name)
 697 {
 698         return (get_table_entry(os_name, "OS", name));
 699 }
 700
 701
 702 static int get_type(char *name)
 703 {
 704         return (get_table_entry(type_name, "Image", name));
 705 }
 706
 707 static int get_table_entry (table_entry_t *table, char *msg, char *name)
 708 {
 709         table_entry_t *t;
 710         int first = 1;
 711
 712         for (t=table; t->val>=0; ++t) {
 713                 if (t->sname && strcasecmp(t->sname, name)==0)
 714                         return (t->val);
 715         }
 716         fprintf (stderr, "\nInvalid %s Type - valid names are", msg);
 717         for (t=table; t->val>=0; ++t) {
 718                 if (t->sname == NULL)
 719                         continue;
 720                 fprintf (stderr, "%c %s", (first) ? ':' : ',', t->sname);
 721                 first = 0;
 722         }
 723         fprintf (stderr, "\n");
 724         return (-1);
 725 }