You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
80 lines
3.4 KiB
Markdown
80 lines
3.4 KiB
Markdown
## 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.
|
|
|
|
## Pixel 3 (blueline)
|
|
|
|
Fickle Google removed "BOARD_BUILD_SYSTEM_ROOT_IMAGE" and added "ro.boot.dynamic_partitions=true", which means normal mode ramdisk is back. Besides, it also packed DTB inside boot.img.
|
|
|
|
## 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](http://ui.nubia.cn/rom/detail/56)
|
|
|
|
## K3 (CPH1955)
|
|
|
|
`boot.img` extracted from OTA zip file doesn't work properly but `recovery.img` works fine. In order to obtain `recovery.img`, a `bsdiff` patch from `system/recovery-from-boot.p` is applied to `boot.img`. Ex: ```bspatch boot.img recovery.img system/recovery-from-boot.p```
|
|
|
|
This part is contributed by @Surendrajat, thanks!
|
|
|
|
## about porting
|
|
|
|
#### libsparse: output\_file.cpp
|
|
|
|
*typeof* is missing in macos clang++, need to change it to *decltype* instead.
|
|
|
|
## using pre-packed ramdisk.img.gz
|
|
place 'ramdisk.img.gz' in directory, delete "root/", program will use it as prebuilt.
|
|
|
|
## cpio
|
|
decompress cpio with commandline `cpio -idmv -F <file>`
|
|
|
|
### cpio on windows
|
|
* got `java.nio.file.FileSystemException` and says "A required privilege is not held by the client"
|
|
```
|
|
java.base/java.nio.file.Files.createSymbolicLink(Files.java:1058)
|
|
```
|
|
Solution:
|
|
Avoid using this feature on Windows, create regular file instead.
|
|
|
|
* File.renameTo() is problematic, use Files.move() instead.
|
|
|
|
* remember to close File streams to avoid any potential problems
|
|
|