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FS#13184: Support 2048 byte sectors and images without bootloader in ipod_fw
(From Stefan Ott)
I wrote a little patch for ipod_fw.c that allows me to create bootable
images for the iPod video without using any external software.
The patch adds two new options:
- The -s option can now be used to specify the sector size in blocks (typically 512 or 2048) when generating an image.
- The -n option can be used to create an image without a boot loader
Change-Id: I35ebcd19ba1491bba76dfc8011e5a856108bb9ad
+32
-17
tools/ipod_fw.c
+32
-17
tools/ipod_fw.c
···
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{
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printf("Usage: ipod_fw [-h]\n"
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" ipod_fw [-v] -o outfile -e img_no fw_file\n"
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-
" ipod_fw [-v] -g gen [-r rev] -o outfile [-i img_from_-e]* [-l raw_img]* ldr_img\n\n"
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+
" ipod_fw [-v] -g gen [-r rev] [-s size] -o outfile [-i img_from_-e]* [-l raw_img]* ldr_img\n\n"
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" -g: set target ipod generation, valid options are: 1g, 2g, 3g\n"
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" 4g, 5g, scroll, touch, dock, mini, photo, color, nano and video\n"
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" -e: extract the image at img_no in boot table to outfile\n"
···
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" may be needed if newest -e img is not the same as the flash rev\n"
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" ldr_img is the iPodLinux loader binary.\n"
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" first image is loaded by default, 2., 3., 4. or 5. loaded if\n"
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-
" rew, menu, play or ff is hold while booting\n\n"
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+
" rew, menu, play or ff is hold while booting\n"
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+
" -n: do not add a boot loader (ldr_img)\n"
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+
" -s: set sector size in bytes (default is 512)\n\n"
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" -v: verbose\n\n"
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" This program is used to create a bootable ipod image.\n\n");
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}
···
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int images_done = 0;
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unsigned version = 0, offset = 0, len = 0;
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int needs_rcsc = 0;
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+
int no_boot = 0;
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test_endian();
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/* parse options */
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opterr = 0;
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-
while ((c = getopt(argc, argv, "3hve:o:i:l:r:g:")) != -1)
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+
while ((c = getopt(argc, argv, "3hve:o:i:l:nr:g:s:")) != -1)
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switch (c) {
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case 'h':
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if (verbose || in || out || images_done || ext) {
···
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images_done++;
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fclose(in);
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break;
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+
case 'n':
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+
no_boot = 1;
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+
break;
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case 'r':
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if (ext) {
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usage();
···
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}
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version = strtol(optarg, NULL, 16);
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break;
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+
case 's':
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+
sectorsize = atoi(optarg);
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+
break;
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case '?':
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fprintf(stderr, "invalid option -%c specified\n", optopt);
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usage();
···
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return 1;
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}
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-
if (argc - optind != 1) {
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+
if ((argc - optind != 1) && !no_boot) {
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usage();
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return 1;
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}
···
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fprintf(stderr, "no images specified!\n");
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return 1;
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}
531
-
if ((in = fopen(argv[optind], "rb")) == NULL) {
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-
fprintf(stderr, "Cannot open loader image file %s\n", argv[optind]);
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-
return 1;
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-
}
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-
offset = (offset + 0x1ff) & ~0x1ff;
536
-
if ((len = lengthof(in)) == -1)
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-
return 1;
538
-
if (fseek(out, offset, SEEK_SET) == -1) {
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-
fprintf(stderr, "fseek failed: %s\n", strerror(errno));
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-
return 1;
540
+
if (!no_boot)
541
+
{
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+
if ((in = fopen(argv[optind], "rb")) == NULL) {
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+
fprintf(stderr, "Cannot open loader image file %s\n", argv[optind]);
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+
return 1;
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+
}
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+
offset = (offset + 0x1ff) & ~0x1ff;
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+
if ((len = lengthof(in)) == -1)
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+
return 1;
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+
if (fseek(out, offset, SEEK_SET) == -1) {
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+
fprintf(stderr, "fseek failed: %s\n", strerror(errno));
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+
return 1;
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+
}
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+
if (copysum(in, out, len, 0) == -1)
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+
return 1;
541
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}
542
-
if (copysum(in, out, len, 0) == -1)
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-
return 1;
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for (i=0; i < images_done; i++) {
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if (images[i].vers > image.vers) image.vers = images[i].vers;
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if (write_entry(images+i, out, offset+0x0100, i) == -1)
···
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}
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if (version) image.vers = version;
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image.len = offset + len - FIRST_OFFSET;
551
-
image.entryOffset = offset - FIRST_OFFSET;
563
+
if (!no_boot)
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+
{
565
+
image.entryOffset = offset - FIRST_OFFSET;
566
+
}
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image.devOffset = (sectorsize==512 ? 0x4400 : 0x4800);
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if ((image.chksum = copysum(out, NULL, image.len, FIRST_OFFSET)) == -1)
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569
return 1;