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