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