tools/mkimage.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * (C) Copyright 2008 Semihalf
   4  *
   5  * (C) Copyright 2000-2009
   6  * DENX Software Engineering
   7  * Wolfgang Denk, wd@denx.de
   8  */
   9
  10 #include "imagetool.h"
  11 #include "mkimage.h"
  12 #include "imximage.h"
  13 #include <image.h>
  14 #include <version.h>
  15
  16 static void copy_file(int, const char *, int);
  17
  18 /* parameters initialized by core will be used by the image type code */
  19 static struct image_tool_params params = {
  20         .os = IH_OS_LINUX,
  21         .arch = IH_ARCH_PPC,
  22         .type = IH_TYPE_KERNEL,
  23         .comp = IH_COMP_GZIP,
  24         .dtc = MKIMAGE_DEFAULT_DTC_OPTIONS,
  25         .imagename = "",
  26         .imagename2 = "",
  27 };
  28
  29 static enum ih_category cur_category;
  30
  31 static int h_compare_category_name(const void *vtype1, const void *vtype2)
  32 {
  33         const int *type1 = vtype1;
  34         const int *type2 = vtype2;
  35         const char *name1 = genimg_get_cat_short_name(cur_category, *type1);
  36         const char *name2 = genimg_get_cat_short_name(cur_category, *type2);
  37
  38         return strcmp(name1, name2);
  39 }
  40
  41 static int show_valid_options(enum ih_category category)
  42 {
  43         int *order;
  44         int count;
  45         int item;
  46         int i;
  47
  48         count = genimg_get_cat_count(category);
  49         order = calloc(count, sizeof(*order));
  50         if (!order)
  51                 return -ENOMEM;
  52
  53         /* Sort the names in order of short name for easier reading */
  54         for (item = 0; item < count; item++)
  55                 order[item] = item;
  56         cur_category = category;
  57         qsort(order, count, sizeof(int), h_compare_category_name);
  58
  59         fprintf(stderr, "\nInvalid %s, supported are:\n",
  60                 genimg_get_cat_desc(category));
  61         for (i = 0; i < count; i++) {
  62                 item = order[i];
  63                 fprintf(stderr, "\t%-15s  %s\n",
  64                         genimg_get_cat_short_name(category, item),
  65                         genimg_get_cat_name(category, item));
  66         }
  67         fprintf(stderr, "\n");
  68         free(order);
  69
  70         return 0;
  71 }
  72
  73 static void usage(const char *msg)
  74 {
  75         fprintf(stderr, "Error: %s\n", msg);
  76         fprintf(stderr, "Usage: %s -l image\n"
  77                          "          -l ==> list image header information\n",
  78                 params.cmdname);
  79         fprintf(stderr,
  80                 "       %s [-x] -A arch -O os -T type -C comp -a addr -e ep -n name -d data_file[:data_file...] image\n"
  81                 "          -A ==> set architecture to 'arch'\n"
  82                 "          -O ==> set operating system to 'os'\n"
  83                 "          -T ==> set image type to 'type'\n"
  84                 "          -C ==> set compression type 'comp'\n"
  85                 "          -a ==> set load address to 'addr' (hex)\n"
  86                 "          -e ==> set entry point to 'ep' (hex)\n"
  87                 "          -n ==> set image name to 'name'\n"
  88                 "          -d ==> use image data from 'datafile'\n"
  89                 "          -x ==> set XIP (execute in place)\n",
  90                 params.cmdname);
  91         fprintf(stderr,
  92                 "       %s [-D dtc_options] [-f fit-image.its|-f auto|-F] [-b <dtb> [-b <dtb>]] [-i <ramdisk.cpio.gz>] fit-image\n"
  93                 "           <dtb> file is used with -f auto, it may occur multiple times.\n",
  94                 params.cmdname);
  95         fprintf(stderr,
  96                 "          -D => set all options for device tree compiler\n"
  97                 "          -f => input filename for FIT source\n"
  98                 "          -i => input filename for ramdisk file\n");
  99 #ifdef CONFIG_FIT_SIGNATURE
 100         fprintf(stderr,
 101                 "Signing / verified boot options: [-E] [-k keydir] [-K dtb] [ -c <comment>] [-p addr] [-r] [-N engine]\n"
 102                 "          -E => place data outside of the FIT structure\n"
 103                 "          -k => set directory containing private keys\n"
 104                 "          -K => write public keys to this .dtb file\n"
 105                 "          -c => add comment in signature node\n"
 106                 "          -F => re-sign existing FIT image\n"
 107                 "          -p => place external data at a static position\n"
 108                 "          -r => mark keys used as 'required' in dtb\n"
 109                 "          -N => openssl engine to use for signing\n");
 110 #else
 111         fprintf(stderr,
 112                 "Signing / verified boot not supported (CONFIG_FIT_SIGNATURE undefined)\n");
 113 #endif
 114         fprintf(stderr, "       %s -V ==> print version information and exit\n",
 115                 params.cmdname);
 116         fprintf(stderr, "Use '-T list' to see a list of available image types\n");
 117
 118         exit(EXIT_FAILURE);
 119 }
 120
 121 static int add_content(int type, const char *fname)
 122 {
 123         struct content_info *cont;
 124
 125         cont = calloc(1, sizeof(*cont));
 126         if (!cont)
 127                 return -1;
 128         cont->type = type;
 129         cont->fname = fname;
 130         if (params.content_tail)
 131                 params.content_tail->next = cont;
 132         else
 133                 params.content_head = cont;
 134         params.content_tail = cont;
 135
 136         return 0;
 137 }
 138
 139 static void process_args(int argc, char **argv)
 140 {
 141         char *ptr;
 142         int type = IH_TYPE_INVALID;
 143         char *datafile = NULL;
 144         int opt;
 145
 146         while ((opt = getopt(argc, argv,
 147                              "a:A:b:c:C:d:D:e:Ef:Fk:i:K:ln:N:p:O:rR:qsT:vVx")) != -1) {
 148                 switch (opt) {
 149                 case 'a':
 150                         params.addr = strtoull(optarg, &ptr, 16);
 151                         if (*ptr) {
 152                                 fprintf(stderr, "%s: invalid load address %s\n",
 153                                         params.cmdname, optarg);
 154                                 exit(EXIT_FAILURE);
 155                         }
 156                         break;
 157                 case 'A':
 158                         params.arch = genimg_get_arch_id(optarg);
 159                         if (params.arch < 0) {
 160                                 show_valid_options(IH_ARCH);
 161                                 usage("Invalid architecture");
 162                         }
 163                         break;
 164                 case 'b':
 165                         if (add_content(IH_TYPE_FLATDT, optarg)) {
 166                                 fprintf(stderr,
 167                                         "%s: Out of memory adding content '%s'",
 168                                         params.cmdname, optarg);
 169                                 exit(EXIT_FAILURE);
 170                         }
 171                         break;
 172                 case 'c':
 173                         params.comment = optarg;
 174                         break;
 175                 case 'C':
 176                         params.comp = genimg_get_comp_id(optarg);
 177                         if (params.comp < 0) {
 178                                 show_valid_options(IH_COMP);
 179                                 usage("Invalid compression type");
 180                         }
 181                         break;
 182                 case 'd':
 183                         params.datafile = optarg;
 184                         params.dflag = 1;
 185                         break;
 186                 case 'D':
 187                         params.dtc = optarg;
 188                         break;
 189                 case 'e':
 190                         params.ep = strtoull(optarg, &ptr, 16);
 191                         if (*ptr) {
 192                                 fprintf(stderr, "%s: invalid entry point %s\n",
 193                                         params.cmdname, optarg);
 194                                 exit(EXIT_FAILURE);
 195                         }
 196                         params.eflag = 1;
 197                         break;
 198                 case 'E':
 199                         params.external_data = true;
 200                         break;
 201                 case 'f':
 202                         datafile = optarg;
 203                         params.auto_its = !strcmp(datafile, "auto");
 204                         /* no break */
 205                 case 'F':
 206                         /*
 207                          * The flattened image tree (FIT) format
 208                          * requires a flattened device tree image type
 209                          */
 210                         params.type = IH_TYPE_FLATDT;
 211                         params.fflag = 1;
 212                         break;
 213                 case 'i':
 214                         params.fit_ramdisk = optarg;
 215                         break;
 216                 case 'k':
 217                         params.keydir = optarg;
 218                         break;
 219                 case 'K':
 220                         params.keydest = optarg;
 221                         break;
 222                 case 'l':
 223                         params.lflag = 1;
 224                         break;
 225                 case 'n':
 226                         params.imagename = optarg;
 227                         break;
 228                 case 'N':
 229                         params.engine_id = optarg;
 230                         break;
 231                 case 'O':
 232                         params.os = genimg_get_os_id(optarg);
 233                         if (params.os < 0) {
 234                                 show_valid_options(IH_OS);
 235                                 usage("Invalid operating system");
 236                         }
 237                         break;
 238                 case 'p':
 239                         params.external_offset = strtoull(optarg, &ptr, 16);
 240                         if (*ptr) {
 241                                 fprintf(stderr, "%s: invalid offset size %s\n",
 242                                         params.cmdname, optarg);
 243                                 exit(EXIT_FAILURE);
 244                         }
 245                         break;
 246                 case 'q':
 247                         params.quiet = 1;
 248                         break;
 249                 case 'r':
 250                         params.require_keys = 1;
 251                         break;
 252                 case 'R':
 253                         /*
 254                          * This entry is for the second configuration
 255                          * file, if only one is not enough.
 256                          */
 257                         params.imagename2 = optarg;
 258                         break;
 259                 case 's':
 260                         params.skipcpy = 1;
 261                         break;
 262                 case 'T':
 263                         if (strcmp(optarg, "list") == 0) {
 264                                 show_valid_options(IH_TYPE);
 265                                 exit(EXIT_SUCCESS);
 266                         }
 267                         type = genimg_get_type_id(optarg);
 268                         if (type < 0) {
 269                                 show_valid_options(IH_TYPE);
 270                                 usage("Invalid image type");
 271                         }
 272                         break;
 273                 case 'v':
 274                         params.vflag++;
 275                         break;
 276                 case 'V':
 277                         printf("mkimage version %s\n", PLAIN_VERSION);
 278                         exit(EXIT_SUCCESS);
 279                 case 'x':
 280                         params.xflag++;
 281                         break;
 282                 default:
 283                         usage("Invalid option");
 284                 }
 285         }
 286
 287         /* The last parameter is expected to be the imagefile */
 288         if (optind < argc)
 289                 params.imagefile = argv[optind];
 290
 291         /*
 292          * For auto-generated FIT images we need to know the image type to put
 293          * in the FIT, which is separate from the file's image type (which
 294          * will always be IH_TYPE_FLATDT in this case).
 295          */
 296         if (params.type == IH_TYPE_FLATDT) {
 297                 params.fit_image_type = type ? type : IH_TYPE_KERNEL;
 298                 /* For auto_its, datafile is always 'auto' */
 299                 if (!params.auto_its)
 300                         params.datafile = datafile;
 301                 else if (!params.datafile)
 302                         usage("Missing data file for auto-FIT (use -d)");
 303         } else if (type != IH_TYPE_INVALID) {
 304                 if (type == IH_TYPE_SCRIPT && !params.datafile)
 305                         usage("Missing data file for script (use -d)");
 306                 params.type = type;
 307         }
 308
 309         if (!params.imagefile)
 310                 usage("Missing output filename");
 311 }
 312
 313 int main(int argc, char **argv)
 314 {
 315         int ifd = -1;
 316         struct stat sbuf;
 317         char *ptr;
 318         int retval = 0;
 319         struct image_type_params *tparams = NULL;
 320         int pad_len = 0;
 321         int dfd;
 322         size_t map_len;
 323
 324         params.cmdname = *argv;
 325         params.addr = 0;
 326         params.ep = 0;
 327
 328         process_args(argc, argv);
 329
 330         /* set tparams as per input type_id */
 331         tparams = imagetool_get_type(params.type);
 332         if (tparams == NULL) {
 333                 fprintf (stderr, "%s: unsupported type %s\n",
 334                         params.cmdname, genimg_get_type_name(params.type));
 335                 exit (EXIT_FAILURE);
 336         }
 337
 338         /*
 339          * check the passed arguments parameters meets the requirements
 340          * as per image type to be generated/listed
 341          */
 342         if (tparams->check_params)
 343                 if (tparams->check_params (&params))
 344                         usage("Bad parameters for image type");
 345
 346         if (!params.eflag) {
 347                 params.ep = params.addr;
 348                 /* If XIP, entry point must be after the U-Boot header */
 349                 if (params.xflag)
 350                         params.ep += tparams->header_size;
 351         }
 352
 353         if (params.fflag){
 354                 if (tparams->fflag_handle)
 355                         /*
 356                          * in some cases, some additional processing needs
 357                          * to be done if fflag is defined
 358                          *
 359                          * For ex. fit_handle_file for Fit file support
 360                          */
 361                         retval = tparams->fflag_handle(&params);
 362
 363                 if (retval != EXIT_SUCCESS)
 364                         exit (retval);
 365         }
 366
 367         if (params.lflag || params.fflag) {
 368                 ifd = open (params.imagefile, O_RDONLY|O_BINARY);
 369         } else {
 370                 ifd = open (params.imagefile,
 371                         O_RDWR|O_CREAT|O_TRUNC|O_BINARY, 0666);
 372         }
 373
 374         if (ifd < 0) {
 375                 fprintf (stderr, "%s: Can't open %s: %s\n",
 376                         params.cmdname, params.imagefile,
 377                         strerror(errno));
 378                 exit (EXIT_FAILURE);
 379         }
 380
 381         if (params.lflag || params.fflag) {
 382                 /*
 383                  * list header information of existing image
 384                  */
 385                 if (fstat(ifd, &sbuf) < 0) {
 386                         fprintf (stderr, "%s: Can't stat %s: %s\n",
 387                                 params.cmdname, params.imagefile,
 388                                 strerror(errno));
 389                         exit (EXIT_FAILURE);
 390                 }
 391
 392                 if ((unsigned)sbuf.st_size < tparams->header_size) {
 393                         fprintf (stderr,
 394                                 "%s: Bad size: \"%s\" is not valid image\n",
 395                                 params.cmdname, params.imagefile);
 396                         exit (EXIT_FAILURE);
 397                 }
 398
 399                 ptr = mmap(0, sbuf.st_size, PROT_READ, MAP_SHARED, ifd, 0);
 400                 if (ptr == MAP_FAILED) {
 401                         fprintf (stderr, "%s: Can't read %s: %s\n",
 402                                 params.cmdname, params.imagefile,
 403                                 strerror(errno));
 404                         exit (EXIT_FAILURE);
 405                 }
 406
 407                 if (params.fflag) {
 408                         /*
 409                          * Verifies the header format based on the expected header for image
 410                          * type in tparams
 411                          */
 412                         retval = imagetool_verify_print_header_by_type(ptr, &sbuf,
 413                                         tparams, &params);
 414                 } else {
 415                         /**
 416                          * When listing the image, we are not given the image type. Simply check all
 417                          * image types to find one that matches our header
 418                          */
 419                         retval = imagetool_verify_print_header(ptr, &sbuf,
 420                                         tparams, &params);
 421                 }
 422
 423                 (void) munmap((void *)ptr, sbuf.st_size);
 424                 (void) close (ifd);
 425
 426                 exit (retval);
 427         }
 428
 429         if ((params.type != IH_TYPE_MULTI) && (params.type != IH_TYPE_SCRIPT)) {
 430                 dfd = open(params.datafile, O_RDONLY | O_BINARY);
 431                 if (dfd < 0) {
 432                         fprintf(stderr, "%s: Can't open %s: %s\n",
 433                                 params.cmdname, params.datafile,
 434                                 strerror(errno));
 435                         exit(EXIT_FAILURE);
 436                 }
 437
 438                 if (fstat(dfd, &sbuf) < 0) {
 439                         fprintf(stderr, "%s: Can't stat %s: %s\n",
 440                                 params.cmdname, params.datafile,
 441                                 strerror(errno));
 442                         exit(EXIT_FAILURE);
 443                 }
 444
 445                 params.file_size = sbuf.st_size + tparams->header_size;
 446                 close(dfd);
 447         }
 448
 449         /*
 450          * In case there an header with a variable
 451          * length will be added, the corresponding
 452          * function is called. This is responsible to
 453          * allocate memory for the header itself.
 454          */
 455         if (tparams->vrec_header)
 456                 pad_len = tparams->vrec_header(&params, tparams);
 457         else
 458                 memset(tparams->hdr, 0, tparams->header_size);
 459
 460         if (write(ifd, tparams->hdr, tparams->header_size)
 461                                         != tparams->header_size) {
 462                 fprintf (stderr, "%s: Write error on %s: %s\n",
 463                         params.cmdname, params.imagefile, strerror(errno));
 464                 exit (EXIT_FAILURE);
 465         }
 466
 467         if (!params.skipcpy) {
 468                 if (params.type == IH_TYPE_MULTI ||
 469                     params.type == IH_TYPE_SCRIPT) {
 470                         char *file = params.datafile;
 471                         uint32_t size;
 472
 473                         for (;;) {
 474                                 char *sep = NULL;
 475
 476                                 if (file) {
 477                                         if ((sep = strchr(file, ':')) != NULL) {
 478                                                 *sep = '\0';
 479                                         }
 480
 481                                         if (stat (file, &sbuf) < 0) {
 482                                                 fprintf (stderr, "%s: Can't stat %s: %s\n",
 483                                                          params.cmdname, file, strerror(errno));
 484                                                 exit (EXIT_FAILURE);
 485                                         }
 486                                         size = cpu_to_uimage (sbuf.st_size);
 487                                 } else {
 488                                         size = 0;
 489                                 }
 490
 491                                 if (write(ifd, (char *)&size, sizeof(size)) != sizeof(size)) {
 492                                         fprintf (stderr, "%s: Write error on %s: %s\n",
 493                                                  params.cmdname, params.imagefile,
 494                                                  strerror(errno));
 495                                         exit (EXIT_FAILURE);
 496                                 }
 497
 498                                 if (!file) {
 499                                         break;
 500                                 }
 501
 502                                 if (sep) {
 503                                         *sep = ':';
 504                                         file = sep + 1;
 505                                 } else {
 506                                         file = NULL;
 507                                 }
 508                         }
 509
 510                         file = params.datafile;
 511
 512                         for (;;) {
 513                                 char *sep = strchr(file, ':');
 514                                 if (sep) {
 515                                         *sep = '\0';
 516                                         copy_file (ifd, file, 1);
 517                                         *sep++ = ':';
 518                                         file = sep;
 519                                 } else {
 520                                         copy_file (ifd, file, 0);
 521                                         break;
 522                                 }
 523                         }
 524                 } else if (params.type == IH_TYPE_PBLIMAGE) {
 525                         /* PBL has special Image format, implements its' own */
 526                         pbl_load_uboot(ifd, &params);
 527                 } else if (params.type == IH_TYPE_ZYNQMPBIF) {
 528                         /* Image file is meta, walk through actual targets */
 529                         int ret;
 530
 531                         ret = zynqmpbif_copy_image(ifd, &params);
 532                         if (ret)
 533                                 return ret;
 534                 } else if (params.type == IH_TYPE_IMX8IMAGE) {
 535                         /* i.MX8/8X has special Image format */
 536                         int ret;
 537
 538                         ret = imx8image_copy_image(ifd, &params);
 539                         if (ret)
 540                                 return ret;
 541                 } else if (params.type == IH_TYPE_IMX8MIMAGE) {
 542                         /* i.MX8M has special Image format */
 543                         int ret;
 544
 545                         ret = imx8mimage_copy_image(ifd, &params);
 546                         if (ret)
 547                                 return ret;
 548                 } else if ((params.type == IH_TYPE_RKSD) ||
 549                                 (params.type == IH_TYPE_RKSPI)) {
 550                         /* Rockchip has special Image format */
 551                         int ret;
 552
 553                         ret = rockchip_copy_image(ifd, &params);
 554                         if (ret)
 555                                 return ret;
 556                 } else {
 557                         copy_file(ifd, params.datafile, pad_len);
 558                 }
 559                 if (params.type == IH_TYPE_FIRMWARE_IVT) {
 560                         /* Add alignment and IVT */
 561                         uint32_t aligned_filesize = ALIGN(params.file_size,
 562                                                           0x1000);
 563                         flash_header_v2_t ivt_header = { { 0xd1, 0x2000, 0x40 },
 564                                         params.addr, 0, 0, 0, params.addr
 565                                                         + aligned_filesize
 566                                                         - tparams->header_size,
 567                                         params.addr + aligned_filesize
 568                                                         - tparams->header_size
 569                                                         + 0x20, 0 };
 570                         int i = params.file_size;
 571                         for (; i < aligned_filesize; i++) {
 572                                 if (write(ifd, (char *) &i, 1) != 1) {
 573                                         fprintf(stderr,
 574                                                         "%s: Write error on %s: %s\n",
 575                                                         params.cmdname,
 576                                                         params.imagefile,
 577                                                         strerror(errno));
 578                                         exit(EXIT_FAILURE);
 579                                 }
 580                         }
 581                         if (write(ifd, &ivt_header, sizeof(flash_header_v2_t))
 582                                         != sizeof(flash_header_v2_t)) {
 583                                 fprintf(stderr, "%s: Write error on %s: %s\n",
 584                                                 params.cmdname,
 585                                                 params.imagefile,
 586                                                 strerror(errno));
 587                                 exit(EXIT_FAILURE);
 588                         }
 589                 }
 590         }
 591
 592         /* We're a bit of paranoid */
 593 #if defined(_POSIX_SYNCHRONIZED_IO) && \
 594    !defined(__sun__) && \
 595    !defined(__FreeBSD__) && \
 596    !defined(__OpenBSD__) && \
 597    !defined(__APPLE__)
 598         (void) fdatasync (ifd);
 599 #else
 600         (void) fsync (ifd);
 601 #endif
 602
 603         if (fstat(ifd, &sbuf) < 0) {
 604                 fprintf (stderr, "%s: Can't stat %s: %s\n",
 605                         params.cmdname, params.imagefile, strerror(errno));
 606                 exit (EXIT_FAILURE);
 607         }
 608         params.file_size = sbuf.st_size;
 609
 610         map_len = sbuf.st_size;
 611         ptr = mmap(0, map_len, PROT_READ | PROT_WRITE, MAP_SHARED, ifd, 0);
 612         if (ptr == MAP_FAILED) {
 613                 fprintf (stderr, "%s: Can't map %s: %s\n",
 614                         params.cmdname, params.imagefile, strerror(errno));
 615                 exit (EXIT_FAILURE);
 616         }
 617
 618         /* Setup the image header as per input image type*/
 619         if (tparams->set_header)
 620                 tparams->set_header (ptr, &sbuf, ifd, &params);
 621         else {
 622                 fprintf (stderr, "%s: Can't set header for %s: %s\n",
 623                         params.cmdname, tparams->name, strerror(errno));
 624                 exit (EXIT_FAILURE);
 625         }
 626
 627         /* Print the image information by processing image header */
 628         if (tparams->print_header)
 629                 tparams->print_header (ptr);
 630         else {
 631                 fprintf (stderr, "%s: Can't print header for %s\n",
 632                         params.cmdname, tparams->name);
 633         }
 634
 635         (void)munmap((void *)ptr, map_len);
 636
 637         /* We're a bit of paranoid */
 638 #if defined(_POSIX_SYNCHRONIZED_IO) && \
 639    !defined(__sun__) && \
 640    !defined(__FreeBSD__) && \
 641    !defined(__OpenBSD__) && \
 642    !defined(__APPLE__)
 643         (void) fdatasync (ifd);
 644 #else
 645         (void) fsync (ifd);
 646 #endif
 647
 648         if (close(ifd)) {
 649                 fprintf (stderr, "%s: Write error on %s: %s\n",
 650                         params.cmdname, params.imagefile, strerror(errno));
 651                 exit (EXIT_FAILURE);
 652         }
 653
 654         exit (EXIT_SUCCESS);
 655 }
 656
 657 static void
 658 copy_file (int ifd, const char *datafile, int pad)
 659 {
 660         int dfd;
 661         struct stat sbuf;
 662         unsigned char *ptr;
 663         int tail;
 664         int zero = 0;
 665         uint8_t zeros[4096];
 666         int offset = 0;
 667         int size;
 668         struct image_type_params *tparams = imagetool_get_type(params.type);
 669
 670         memset(zeros, 0, sizeof(zeros));
 671
 672         if (params.vflag) {
 673                 fprintf (stderr, "Adding Image %s\n", datafile);
 674         }
 675
 676         if ((dfd = open(datafile, O_RDONLY|O_BINARY)) < 0) {
 677                 fprintf (stderr, "%s: Can't open %s: %s\n",
 678                         params.cmdname, datafile, strerror(errno));
 679                 exit (EXIT_FAILURE);
 680         }
 681
 682         if (fstat(dfd, &sbuf) < 0) {
 683                 fprintf (stderr, "%s: Can't stat %s: %s\n",
 684                         params.cmdname, datafile, strerror(errno));
 685                 exit (EXIT_FAILURE);
 686         }
 687
 688         ptr = mmap(0, sbuf.st_size, PROT_READ, MAP_SHARED, dfd, 0);
 689         if (ptr == MAP_FAILED) {
 690                 fprintf (stderr, "%s: Can't read %s: %s\n",
 691                         params.cmdname, datafile, strerror(errno));
 692                 exit (EXIT_FAILURE);
 693         }
 694
 695         if (params.xflag) {
 696                 unsigned char *p = NULL;
 697                 /*
 698                  * XIP: do not append the image_header_t at the
 699                  * beginning of the file, but consume the space
 700                  * reserved for it.
 701                  */
 702
 703                 if ((unsigned)sbuf.st_size < tparams->header_size) {
 704                         fprintf (stderr,
 705                                 "%s: Bad size: \"%s\" is too small for XIP\n",
 706                                 params.cmdname, datafile);
 707                         exit (EXIT_FAILURE);
 708                 }
 709
 710                 for (p = ptr; p < ptr + tparams->header_size; p++) {
 711                         if ( *p != 0xff ) {
 712                                 fprintf (stderr,
 713                                         "%s: Bad file: \"%s\" has invalid buffer for XIP\n",
 714                                         params.cmdname, datafile);
 715                                 exit (EXIT_FAILURE);
 716                         }
 717                 }
 718
 719                 offset = tparams->header_size;
 720         }
 721
 722         size = sbuf.st_size - offset;
 723         if (write(ifd, ptr + offset, size) != size) {
 724                 fprintf (stderr, "%s: Write error on %s: %s\n",
 725                         params.cmdname, params.imagefile, strerror(errno));
 726                 exit (EXIT_FAILURE);
 727         }
 728
 729         tail = size % 4;
 730         if ((pad == 1) && (tail != 0)) {
 731
 732                 if (write(ifd, (char *)&zero, 4-tail) != 4-tail) {
 733                         fprintf (stderr, "%s: Write error on %s: %s\n",
 734                                 params.cmdname, params.imagefile,
 735                                 strerror(errno));
 736                         exit (EXIT_FAILURE);
 737                 }
 738         } else if (pad > 1) {
 739                 while (pad > 0) {
 740                         int todo = sizeof(zeros);
 741
 742                         if (todo > pad)
 743                                 todo = pad;
 744                         if (write(ifd, (char *)&zeros, todo) != todo) {
 745                                 fprintf(stderr, "%s: Write error on %s: %s\n",
 746                                         params.cmdname, params.imagefile,
 747                                         strerror(errno));
 748                                 exit(EXIT_FAILURE);
 749                         }
 750                         pad -= todo;
 751                 }
 752         }
 753
 754         (void) munmap((void *)ptr, sbuf.st_size);
 755         (void) close (dfd);
 756 }