tools/mkimage.c

   1 /*
   2  * (C) Copyright 2000-2004
   3  * DENX Software Engineering
   4  * Wolfgang Denk, wd@denx.de
   5  * All rights reserved.
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License as
   9  * published by the Free Software Foundation; either version 2 of
  10  * the License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  20  * MA 02111-1307 USA
  21  */
  22
  23 #include <errno.h>
  24 #include <fcntl.h>
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27 #include <string.h>
  28 #ifndef __WIN32__
  29 #include <netinet/in.h>         /* for host / network byte order conversions    */
  30 #endif
  31 #include <sys/mman.h>
  32 #include <sys/stat.h>
  33 #include <time.h>
  34 #include <unistd.h>
  35
  36 #if defined(__BEOS__) || defined(__NetBSD__) || defined(__APPLE__)
  37 #include <inttypes.h>
  38 #endif
  39
  40 #ifdef __WIN32__
  41 typedef unsigned int __u32;
  42
  43 #define SWAP_LONG(x) \
  44         ((__u32)( \
  45                 (((__u32)(x) & (__u32)0x000000ffUL) << 24) | \
  46                 (((__u32)(x) & (__u32)0x0000ff00UL) <<  8) | \
  47                 (((__u32)(x) & (__u32)0x00ff0000UL) >>  8) | \
  48                 (((__u32)(x) & (__u32)0xff000000UL) >> 24) ))
  49 typedef         unsigned char   uint8_t;
  50 typedef         unsigned short  uint16_t;
  51 typedef         unsigned int    uint32_t;
  52
  53 #define     ntohl(a)    SWAP_LONG(a)
  54 #define     htonl(a)    SWAP_LONG(a)
  55 #endif  /* __WIN32__ */
  56
  57 #ifndef O_BINARY                /* should be define'd on __WIN32__ */
  58 #define O_BINARY        0
  59 #endif
  60
  61 #include <image.h>
  62
  63 extern int errno;
  64
  65 #ifndef MAP_FAILED
  66 #define MAP_FAILED (-1)
  67 #endif
  68
  69 char *cmdname;
  70
  71 extern unsigned long crc32 (unsigned long crc, const char *buf, unsigned int len);
  72
  73 typedef struct table_entry {
  74         int     val;            /* as defined in image.h        */
  75         char    *sname;         /* short (input) name           */
  76         char    *lname;         /* long (output) name           */
  77 } table_entry_t;
  78
  79 table_entry_t arch_name[] = {
  80     {   IH_CPU_INVALID,         NULL,           "Invalid CPU",  },
  81     {   IH_CPU_ALPHA,           "alpha",        "Alpha",        },
  82     {   IH_CPU_ARM,             "arm",          "ARM",          },
  83     {   IH_CPU_I386,            "x86",          "Intel x86",    },
  84     {   IH_CPU_IA64,            "ia64",         "IA64",         },
  85     {   IH_CPU_M68K,            "m68k",         "MC68000",      },
  86     {   IH_CPU_MICROBLAZE,      "microblaze",   "MicroBlaze",   },
  87     {   IH_CPU_MIPS,            "mips",         "MIPS",         },
  88     {   IH_CPU_MIPS64,          "mips64",       "MIPS 64 Bit",  },
  89     {   IH_CPU_NIOS,            "nios",         "NIOS",         },
  90     {   IH_CPU_NIOS2,           "nios2",        "NIOS II",      },
  91     {   IH_CPU_PPC,             "ppc",          "PowerPC",      },
  92     {   IH_CPU_S390,            "s390",         "IBM S390",     },
  93     {   IH_CPU_SH,              "sh",           "SuperH",       },
  94     {   IH_CPU_SPARC,           "sparc",        "SPARC",        },
  95     {   IH_CPU_SPARC64,         "sparc64",      "SPARC 64 Bit", },
  96     {   IH_CPU_BLACKFIN,        "blackfin",     "Blackfin",     },
  97     {   -1,                     "",             "",             },
  98 };
  99
 100 table_entry_t os_name[] = {
 101     {   IH_OS_INVALID,  NULL,           "Invalid OS",           },
 102     {   IH_OS_4_4BSD,   "4_4bsd",       "4_4BSD",               },
 103     {   IH_OS_ARTOS,    "artos",        "ARTOS",                },
 104     {   IH_OS_DELL,     "dell",         "Dell",                 },
 105     {   IH_OS_ESIX,     "esix",         "Esix",                 },
 106     {   IH_OS_FREEBSD,  "freebsd",      "FreeBSD",              },
 107     {   IH_OS_IRIX,     "irix",         "Irix",                 },
 108     {   IH_OS_LINUX,    "linux",        "Linux",                },
 109     {   IH_OS_LYNXOS,   "lynxos",       "LynxOS",               },
 110     {   IH_OS_NCR,      "ncr",          "NCR",                  },
 111     {   IH_OS_NETBSD,   "netbsd",       "NetBSD",               },
 112     {   IH_OS_OPENBSD,  "openbsd",      "OpenBSD",              },
 113     {   IH_OS_PSOS,     "psos",         "pSOS",                 },
 114     {   IH_OS_QNX,      "qnx",          "QNX",                  },
 115     {   IH_OS_RTEMS,    "rtems",        "RTEMS",                },
 116     {   IH_OS_SCO,      "sco",          "SCO",                  },
 117     {   IH_OS_SOLARIS,  "solaris",      "Solaris",              },
 118     {   IH_OS_SVR4,     "svr4",         "SVR4",                 },
 119     {   IH_OS_U_BOOT,   "u-boot",       "U-Boot",               },
 120     {   IH_OS_VXWORKS,  "vxworks",      "VxWorks",              },
 121     {   -1,             "",             "",                     },
 122 };
 123
 124 table_entry_t type_name[] = {
 125     {   IH_TYPE_INVALID,    NULL,         "Invalid Image",      },
 126     {   IH_TYPE_FILESYSTEM, "filesystem", "Filesystem Image",   },
 127     {   IH_TYPE_FIRMWARE,   "firmware",   "Firmware",           },
 128     {   IH_TYPE_KERNEL,     "kernel",     "Kernel Image",       },
 129     {   IH_TYPE_MULTI,      "multi",      "Multi-File Image",   },
 130     {   IH_TYPE_RAMDISK,    "ramdisk",    "RAMDisk Image",      },
 131     {   IH_TYPE_SCRIPT,     "script",     "Script",             },
 132     {   IH_TYPE_STANDALONE, "standalone", "Standalone Program", },
 133     {   -1,                 "",           "",                   },
 134 };
 135
 136 table_entry_t comp_name[] = {
 137     {   IH_COMP_NONE,   "none",         "uncompressed",         },
 138     {   IH_COMP_BZIP2,  "bzip2",        "bzip2 compressed",     },
 139     {   IH_COMP_GZIP,   "gzip",         "gzip compressed",      },
 140     {   -1,             "",             "",                     },
 141 };
 142
 143 static  void    copy_file (int, const char *, int);
 144 static  void    usage   (void);
 145 static  void    print_header (image_header_t *);
 146 static  void    print_type (image_header_t *);
 147 static  char    *put_table_entry (table_entry_t *, char *, int);
 148 static  char    *put_arch (int);
 149 static  char    *put_type (int);
 150 static  char    *put_os   (int);
 151 static  char    *put_comp (int);
 152 static  int     get_table_entry (table_entry_t *, char *, char *);
 153 static  int     get_arch(char *);
 154 static  int     get_comp(char *);
 155 static  int     get_os  (char *);
 156 static  int     get_type(char *);
 157
 158
 159 char    *datafile;
 160 char    *imagefile;
 161
 162 int dflag    = 0;
 163 int eflag    = 0;
 164 int lflag    = 0;
 165 int vflag    = 0;
 166 int xflag    = 0;
 167 int opt_os   = IH_OS_LINUX;
 168 int opt_arch = IH_CPU_PPC;
 169 int opt_type = IH_TYPE_KERNEL;
 170 int opt_comp = IH_COMP_GZIP;
 171
 172 image_header_t header;
 173 image_header_t *hdr = &header;
 174
 175 int
 176 main (int argc, char **argv)
 177 {
 178         int ifd;
 179         uint32_t checksum;
 180         uint32_t addr;
 181         uint32_t ep;
 182         struct stat sbuf;
 183         unsigned char *ptr;
 184         char *name = "";
 185
 186         cmdname = *argv;
 187
 188         addr = ep = 0;
 189
 190         while (--argc > 0 && **++argv == '-') {
 191                 while (*++*argv) {
 192                         switch (**argv) {
 193                         case 'l':
 194                                 lflag = 1;
 195                                 break;
 196                         case 'A':
 197                                 if ((--argc <= 0) ||
 198                                     (opt_arch = get_arch(*++argv)) < 0)
 199                                         usage ();
 200                                 goto NXTARG;
 201                         case 'C':
 202                                 if ((--argc <= 0) ||
 203                                     (opt_comp = get_comp(*++argv)) < 0)
 204                                         usage ();
 205                                 goto NXTARG;
 206                         case 'O':
 207                                 if ((--argc <= 0) ||
 208                                     (opt_os = get_os(*++argv)) < 0)
 209                                         usage ();
 210                                 goto NXTARG;
 211                         case 'T':
 212                                 if ((--argc <= 0) ||
 213                                     (opt_type = get_type(*++argv)) < 0)
 214                                         usage ();
 215                                 goto NXTARG;
 216
 217                         case 'a':
 218                                 if (--argc <= 0)
 219                                         usage ();
 220                                 addr = strtoul (*++argv, (char **)&ptr, 16);
 221                                 if (*ptr) {
 222                                         fprintf (stderr,
 223                                                 "%s: invalid load address %s\n",
 224                                                 cmdname, *argv);
 225                                         exit (EXIT_FAILURE);
 226                                 }
 227                                 goto NXTARG;
 228                         case 'd':
 229                                 if (--argc <= 0)
 230                                         usage ();
 231                                 datafile = *++argv;
 232                                 dflag = 1;
 233                                 goto NXTARG;
 234                         case 'e':
 235                                 if (--argc <= 0)
 236                                         usage ();
 237                                 ep = strtoul (*++argv, (char **)&ptr, 16);
 238                                 if (*ptr) {
 239                                         fprintf (stderr,
 240                                                 "%s: invalid entry point %s\n",
 241                                                 cmdname, *argv);
 242                                         exit (EXIT_FAILURE);
 243                                 }
 244                                 eflag = 1;
 245                                 goto NXTARG;
 246                         case 'n':
 247                                 if (--argc <= 0)
 248                                         usage ();
 249                                 name = *++argv;
 250                                 goto NXTARG;
 251                         case 'v':
 252                                 vflag++;
 253                                 break;
 254                         case 'x':
 255                                 xflag++;
 256                                 break;
 257                         default:
 258                                 usage ();
 259                         }
 260                 }
 261 NXTARG:         ;
 262         }
 263
 264         if ((argc != 1) || ((lflag ^ dflag) == 0))
 265                 usage();
 266
 267         if (!eflag) {
 268                 ep = addr;
 269                 /* If XIP, entry point must be after the U-Boot header */
 270                 if (xflag)
 271                         ep += sizeof(image_header_t);
 272         }
 273
 274         /*
 275          * If XIP, ensure the entry point is equal to the load address plus
 276          * the size of the U-Boot header.
 277          */
 278         if (xflag) {
 279                 if (ep != addr + sizeof(image_header_t)) {
 280                         fprintf (stderr,
 281                                 "%s: For XIP, the entry point must be the load addr + %lu\n",
 282                                 cmdname,
 283                                 (unsigned long)sizeof(image_header_t));
 284                         exit (EXIT_FAILURE);
 285                 }
 286         }
 287
 288         imagefile = *argv;
 289
 290         if (lflag) {
 291                 ifd = open(imagefile, O_RDONLY|O_BINARY);
 292         } else {
 293                 ifd = open(imagefile, O_RDWR|O_CREAT|O_TRUNC|O_BINARY, 0666);
 294         }
 295
 296         if (ifd < 0) {
 297                 fprintf (stderr, "%s: Can't open %s: %s\n",
 298                         cmdname, imagefile, strerror(errno));
 299                 exit (EXIT_FAILURE);
 300         }
 301
 302         if (lflag) {
 303                 int len;
 304                 char *data;
 305                 /*
 306                  * list header information of existing image
 307                  */
 308                 if (fstat(ifd, &sbuf) < 0) {
 309                         fprintf (stderr, "%s: Can't stat %s: %s\n",
 310                                 cmdname, imagefile, strerror(errno));
 311                         exit (EXIT_FAILURE);
 312                 }
 313
 314                 if ((unsigned)sbuf.st_size < sizeof(image_header_t)) {
 315                         fprintf (stderr,
 316                                 "%s: Bad size: \"%s\" is no valid image\n",
 317                                 cmdname, imagefile);
 318                         exit (EXIT_FAILURE);
 319                 }
 320
 321                 ptr = (unsigned char *)mmap(0, sbuf.st_size,
 322                                             PROT_READ, MAP_SHARED, ifd, 0);
 323                 if ((caddr_t)ptr == (caddr_t)-1) {
 324                         fprintf (stderr, "%s: Can't read %s: %s\n",
 325                                 cmdname, imagefile, strerror(errno));
 326                         exit (EXIT_FAILURE);
 327                 }
 328
 329                 /*
 330                  * create copy of header so that we can blank out the
 331                  * checksum field for checking - this can't be done
 332                  * on the PROT_READ mapped data.
 333                  */
 334                 memcpy (hdr, ptr, sizeof(image_header_t));
 335
 336                 if (ntohl(hdr->ih_magic) != IH_MAGIC) {
 337                         fprintf (stderr,
 338                                 "%s: Bad Magic Number: \"%s\" is no valid image\n",
 339                                 cmdname, imagefile);
 340                         exit (EXIT_FAILURE);
 341                 }
 342
 343                 data = (char *)hdr;
 344                 len  = sizeof(image_header_t);
 345
 346                 checksum = ntohl(hdr->ih_hcrc);
 347                 hdr->ih_hcrc = htonl(0);        /* clear for re-calculation */
 348
 349                 if (crc32 (0, data, len) != checksum) {
 350                         fprintf (stderr,
 351                                 "%s: ERROR: \"%s\" has bad header checksum!\n",
 352                                 cmdname, imagefile);
 353                         exit (EXIT_FAILURE);
 354                 }
 355
 356                 data = (char *)(ptr + sizeof(image_header_t));
 357                 len  = sbuf.st_size - sizeof(image_header_t) ;
 358
 359                 if (crc32 (0, data, len) != ntohl(hdr->ih_dcrc)) {
 360                         fprintf (stderr,
 361                                 "%s: ERROR: \"%s\" has corrupted data!\n",
 362                                 cmdname, imagefile);
 363                         exit (EXIT_FAILURE);
 364                 }
 365
 366                 /* for multi-file images we need the data part, too */
 367                 print_header ((image_header_t *)ptr);
 368
 369                 (void) munmap((void *)ptr, sbuf.st_size);
 370                 (void) close (ifd);
 371
 372                 exit (EXIT_SUCCESS);
 373         }
 374
 375         /*
 376          * Must be -w then:
 377          *
 378          * write dummy header, to be fixed later
 379          */
 380         memset (hdr, 0, sizeof(image_header_t));
 381
 382         if (write(ifd, hdr, sizeof(image_header_t)) != sizeof(image_header_t)) {
 383                 fprintf (stderr, "%s: Write error on %s: %s\n",
 384                         cmdname, imagefile, strerror(errno));
 385                 exit (EXIT_FAILURE);
 386         }
 387
 388         if (opt_type == IH_TYPE_MULTI || opt_type == IH_TYPE_SCRIPT) {
 389                 char *file = datafile;
 390                 uint32_t size;
 391
 392                 for (;;) {
 393                         char *sep = NULL;
 394
 395                         if (file) {
 396                                 if ((sep = strchr(file, ':')) != NULL) {
 397                                         *sep = '\0';
 398                                 }
 399
 400                                 if (stat (file, &sbuf) < 0) {
 401                                         fprintf (stderr, "%s: Can't stat %s: %s\n",
 402                                                 cmdname, file, strerror(errno));
 403                                         exit (EXIT_FAILURE);
 404                                 }
 405                                 size = htonl(sbuf.st_size);
 406                         } else {
 407                                 size = 0;
 408                         }
 409
 410                         if (write(ifd, (char *)&size, sizeof(size)) != sizeof(size)) {
 411                                 fprintf (stderr, "%s: Write error on %s: %s\n",
 412                                         cmdname, imagefile, strerror(errno));
 413                                 exit (EXIT_FAILURE);
 414                         }
 415
 416                         if (!file) {
 417                                 break;
 418                         }
 419
 420                         if (sep) {
 421                                 *sep = ':';
 422                                 file = sep + 1;
 423                         } else {
 424                                 file = NULL;
 425                         }
 426                 }
 427
 428                 file = datafile;
 429
 430                 for (;;) {
 431                         char *sep = strchr(file, ':');
 432                         if (sep) {
 433                                 *sep = '\0';
 434                                 copy_file (ifd, file, 1);
 435                                 *sep++ = ':';
 436                                 file = sep;
 437                         } else {
 438                                 copy_file (ifd, file, 0);
 439                                 break;
 440                         }
 441                 }
 442         } else {
 443                 copy_file (ifd, datafile, 0);
 444         }
 445
 446         /* We're a bit of paranoid */
 447 #if defined(_POSIX_SYNCHRONIZED_IO) && !defined(__sun__) && !defined(__FreeBSD__)
 448         (void) fdatasync (ifd);
 449 #else
 450         (void) fsync (ifd);
 451 #endif
 452
 453         if (fstat(ifd, &sbuf) < 0) {
 454                 fprintf (stderr, "%s: Can't stat %s: %s\n",
 455                         cmdname, imagefile, strerror(errno));
 456                 exit (EXIT_FAILURE);
 457         }
 458
 459         ptr = (unsigned char *)mmap(0, sbuf.st_size,
 460                                     PROT_READ|PROT_WRITE, MAP_SHARED, ifd, 0);
 461         if (ptr == (unsigned char *)MAP_FAILED) {
 462                 fprintf (stderr, "%s: Can't map %s: %s\n",
 463                         cmdname, imagefile, strerror(errno));
 464                 exit (EXIT_FAILURE);
 465         }
 466
 467         hdr = (image_header_t *)ptr;
 468
 469         checksum = crc32 (0,
 470                           (const char *)(ptr + sizeof(image_header_t)),
 471                           sbuf.st_size - sizeof(image_header_t)
 472                          );
 473
 474         /* Build new header */
 475         hdr->ih_magic = htonl(IH_MAGIC);
 476         hdr->ih_time  = htonl(sbuf.st_mtime);
 477         hdr->ih_size  = htonl(sbuf.st_size - sizeof(image_header_t));
 478         hdr->ih_load  = htonl(addr);
 479         hdr->ih_ep    = htonl(ep);
 480         hdr->ih_dcrc  = htonl(checksum);
 481         hdr->ih_os    = opt_os;
 482         hdr->ih_arch  = opt_arch;
 483         hdr->ih_type  = opt_type;
 484         hdr->ih_comp  = opt_comp;
 485
 486         strncpy((char *)hdr->ih_name, name, IH_NMLEN);
 487
 488         checksum = crc32(0,(const char *)hdr,sizeof(image_header_t));
 489
 490         hdr->ih_hcrc = htonl(checksum);
 491
 492         print_header (hdr);
 493
 494         (void) munmap((void *)ptr, sbuf.st_size);
 495
 496         /* We're a bit of paranoid */
 497 #if defined(_POSIX_SYNCHRONIZED_IO) && !defined(__sun__) && !defined(__FreeBSD__)
 498         (void) fdatasync (ifd);
 499 #else
 500         (void) fsync (ifd);
 501 #endif
 502
 503         if (close(ifd)) {
 504                 fprintf (stderr, "%s: Write error on %s: %s\n",
 505                         cmdname, imagefile, strerror(errno));
 506                 exit (EXIT_FAILURE);
 507         }
 508
 509         exit (EXIT_SUCCESS);
 510 }
 511
 512 static void
 513 copy_file (int ifd, const char *datafile, int pad)
 514 {
 515         int dfd;
 516         struct stat sbuf;
 517         unsigned char *ptr;
 518         int tail;
 519         int zero = 0;
 520         int offset = 0;
 521         int size;
 522
 523         if (vflag) {
 524                 fprintf (stderr, "Adding Image %s\n", datafile);
 525         }
 526
 527         if ((dfd = open(datafile, O_RDONLY|O_BINARY)) < 0) {
 528                 fprintf (stderr, "%s: Can't open %s: %s\n",
 529                         cmdname, datafile, strerror(errno));
 530                 exit (EXIT_FAILURE);
 531         }
 532
 533         if (fstat(dfd, &sbuf) < 0) {
 534                 fprintf (stderr, "%s: Can't stat %s: %s\n",
 535                         cmdname, datafile, strerror(errno));
 536                 exit (EXIT_FAILURE);
 537         }
 538
 539         ptr = (unsigned char *)mmap(0, sbuf.st_size,
 540                                     PROT_READ, MAP_SHARED, dfd, 0);
 541         if (ptr == (unsigned char *)MAP_FAILED) {
 542                 fprintf (stderr, "%s: Can't read %s: %s\n",
 543                         cmdname, datafile, strerror(errno));
 544                 exit (EXIT_FAILURE);
 545         }
 546
 547         if (xflag) {
 548                 unsigned char *p = NULL;
 549                 /*
 550                  * XIP: do not append the image_header_t at the
 551                  * beginning of the file, but consume the space
 552                  * reserved for it.
 553                  */
 554
 555                 if ((unsigned)sbuf.st_size < sizeof(image_header_t)) {
 556                         fprintf (stderr,
 557                                 "%s: Bad size: \"%s\" is too small for XIP\n",
 558                                 cmdname, datafile);
 559                         exit (EXIT_FAILURE);
 560                 }
 561
 562                 for (p=ptr; p < ptr+sizeof(image_header_t); p++) {
 563                         if ( *p != 0xff ) {
 564                                 fprintf (stderr,
 565                                         "%s: Bad file: \"%s\" has invalid buffer for XIP\n",
 566                                         cmdname, datafile);
 567                                 exit (EXIT_FAILURE);
 568                         }
 569                 }
 570
 571                 offset = sizeof(image_header_t);
 572         }
 573
 574         size = sbuf.st_size - offset;
 575         if (write(ifd, ptr + offset, size) != size) {
 576                 fprintf (stderr, "%s: Write error on %s: %s\n",
 577                         cmdname, imagefile, strerror(errno));
 578                 exit (EXIT_FAILURE);
 579         }
 580
 581         if (pad && ((tail = size % 4) != 0)) {
 582
 583                 if (write(ifd, (char *)&zero, 4-tail) != 4-tail) {
 584                         fprintf (stderr, "%s: Write error on %s: %s\n",
 585                                 cmdname, imagefile, strerror(errno));
 586                         exit (EXIT_FAILURE);
 587                 }
 588         }
 589
 590         (void) munmap((void *)ptr, sbuf.st_size);
 591         (void) close (dfd);
 592 }
 593
 594 void
 595 usage ()
 596 {
 597         fprintf (stderr, "Usage: %s -l image\n"
 598                          "          -l ==> list image header information\n"
 599                          "       %s [-x] -A arch -O os -T type -C comp "
 600                          "-a addr -e ep -n name -d data_file[:data_file...] image\n",
 601                 cmdname, cmdname);
 602         fprintf (stderr, "          -A ==> set architecture to 'arch'\n"
 603                          "          -O ==> set operating system to 'os'\n"
 604                          "          -T ==> set image type to 'type'\n"
 605                          "          -C ==> set compression type 'comp'\n"
 606                          "          -a ==> set load address to 'addr' (hex)\n"
 607                          "          -e ==> set entry point to 'ep' (hex)\n"
 608                          "          -n ==> set image name to 'name'\n"
 609                          "          -d ==> use image data from 'datafile'\n"
 610                          "          -x ==> set XIP (execute in place)\n"
 611                 );
 612         exit (EXIT_FAILURE);
 613 }
 614
 615 static void
 616 print_header (image_header_t *hdr)
 617 {
 618         time_t timestamp;
 619         uint32_t size;
 620
 621         timestamp = (time_t)ntohl(hdr->ih_time);
 622         size = ntohl(hdr->ih_size);
 623
 624         printf ("Image Name:   %.*s\n", IH_NMLEN, hdr->ih_name);
 625         printf ("Created:      %s", ctime(&timestamp));
 626         printf ("Image Type:   "); print_type(hdr);
 627         printf ("Data Size:    %d Bytes = %.2f kB = %.2f MB\n",
 628                 size, (double)size / 1.024e3, (double)size / 1.048576e6 );
 629         printf ("Load Address: 0x%08X\n", ntohl(hdr->ih_load));
 630         printf ("Entry Point:  0x%08X\n", ntohl(hdr->ih_ep));
 631
 632         if (hdr->ih_type == IH_TYPE_MULTI || hdr->ih_type == IH_TYPE_SCRIPT) {
 633                 int i, ptrs;
 634                 uint32_t pos;
 635                 unsigned long *len_ptr = (unsigned long *) (
 636                                         (unsigned long)hdr + sizeof(image_header_t)
 637                                 );
 638
 639                 /* determine number of images first (to calculate image offsets) */
 640                 for (i=0; len_ptr[i]; ++i)      /* null pointer terminates list */
 641                         ;
 642                 ptrs = i;               /* null pointer terminates list */
 643
 644                 pos = sizeof(image_header_t) + ptrs * sizeof(long);
 645                 printf ("Contents:\n");
 646                 for (i=0; len_ptr[i]; ++i) {
 647                         size = ntohl(len_ptr[i]);
 648
 649                         printf ("   Image %d: %8d Bytes = %4d kB = %d MB\n",
 650                                 i, size, size>>10, size>>20);
 651                         if (hdr->ih_type == IH_TYPE_SCRIPT && i > 0) {
 652                                 /*
 653                                  * the user may need to know offsets
 654                                  * if planning to do something with
 655                                  * multiple files
 656                                  */
 657                                 printf ("    Offset = %08X\n", pos);
 658                         }
 659                         /* copy_file() will pad the first files to even word align */
 660                         size += 3;
 661                         size &= ~3;
 662                         pos += size;
 663                 }
 664         }
 665 }
 666
 667
 668 static void
 669 print_type (image_header_t *hdr)
 670 {
 671         printf ("%s %s %s (%s)\n",
 672                 put_arch (hdr->ih_arch),
 673                 put_os   (hdr->ih_os  ),
 674                 put_type (hdr->ih_type),
 675                 put_comp (hdr->ih_comp)
 676         );
 677 }
 678
 679 static char *put_arch (int arch)
 680 {
 681         return (put_table_entry(arch_name, "Unknown Architecture", arch));
 682 }
 683
 684 static char *put_os (int os)
 685 {
 686         return (put_table_entry(os_name, "Unknown OS", os));
 687 }
 688
 689 static char *put_type (int type)
 690 {
 691         return (put_table_entry(type_name, "Unknown Image", type));
 692 }
 693
 694 static char *put_comp (int comp)
 695 {
 696         return (put_table_entry(comp_name, "Unknown Compression", comp));
 697 }
 698
 699 static char *put_table_entry (table_entry_t *table, char *msg, int type)
 700 {
 701         for (; table->val>=0; ++table) {
 702                 if (table->val == type)
 703                         return (table->lname);
 704         }
 705         return (msg);
 706 }
 707
 708 static int get_arch(char *name)
 709 {
 710         return (get_table_entry(arch_name, "CPU", name));
 711 }
 712
 713
 714 static int get_comp(char *name)
 715 {
 716         return (get_table_entry(comp_name, "Compression", name));
 717 }
 718
 719
 720 static int get_os (char *name)
 721 {
 722         return (get_table_entry(os_name, "OS", name));
 723 }
 724
 725
 726 static int get_type(char *name)
 727 {
 728         return (get_table_entry(type_name, "Image", name));
 729 }
 730
 731 static int get_table_entry (table_entry_t *table, char *msg, char *name)
 732 {
 733         table_entry_t *t;
 734         int first = 1;
 735
 736         for (t=table; t->val>=0; ++t) {
 737                 if (t->sname && strcasecmp(t->sname, name)==0)
 738                         return (t->val);
 739         }
 740         fprintf (stderr, "\nInvalid %s Type - valid names are", msg);
 741         for (t=table; t->val>=0; ++t) {
 742                 if (t->sname == NULL)
 743                         continue;
 744                 fprintf (stderr, "%c %s", (first) ? ':' : ',', t->sname);
 745                 first = 0;
 746         }
 747         fprintf (stderr, "\n");
 748         return (-1);
 749 }