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