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Android_boot_image_editor/doc/additional_tricks.md

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tricks for Nexus 9(volantis)

volantis has a dummy header of size 256 bytes, which looks like this:

0000000: 78 56 34 12 00 00 00 00 00 ba 86 00 00 01 00 00  xV4.............
0000010: 00 01 00 00 00 b8 86 00 00 b9 86 00 00 01 00 00  ................
0000020: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
0000030: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
0000040: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
0000050: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
0000060: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
0000070: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
0000080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
0000090: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
00000a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
00000b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
00000c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
00000d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
00000e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
00000f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
0000100: 41 4e 44 52 4f 49 44 21 72 64 6d 00 00 80 00 10  ANDROID!rdm.....
0000110: d0 41 19 00 00 00 00 11 00 00 00 00 00 00 f0 10  .A..............

We have to trim the header before it can be recognized by our toy.

$ dd if=boot.img of=raw_boot bs=256 skip=1

Now we can work with 'raw_boot'

$ cp raw_boot boot.img
$ gradle unpack
$ gradle pack

Pixel XL (marlin)

marlin is a profile that adopts A/B system schema while still using Verified Boot 1.0 style boot image.

Due to the configuration "BOARD_BUILD_SYSTEM_ROOT_IMAGE := true", the embeded ramdisk in boot.img is actually used in recovery mode.

NX606J

Thanks to the work by [CallMESuper], ZTE NX606J boot.img is also verified to be compatible with this toolkit.

ROM download page: http://ui.nubia.cn/rom/detail/56