boot.img unpack and pack - HappyZ/dpt-tools GitHub Wiki
Just a log to add adbd
Check this repo for detailed mod.
Obtain https://github.com/osm0sis/mkbootimg and make.
Obtain boot.img from your device using backup-bootimg in the diagnosis mode with dpt-tools.py, or download the firmware pkg, unpack it, and obtain the latest boot.img there.
In mkbootimg folder, unpack the boot.img:
cp <boot.img file path> ./test.img
if [[ -d test ]]; then
rm -rf test
fi
mkdir test
./unpackbootimg -i test.img -o test
cd test
if [[ -d ramdisk ]]; then
rm -rf ramdisk
fi
mkdir ramdisk
cd ramdisk
zcat < ../test.img-ramdisk.gz | cpio -idmv
Add adbd inside sbin/ in ./test/ramdisk/
Modify ./test/ramdisk/default.prop accordingly:
ro.secure=0
ro.adb.secure=0
ro.allow.mock.location=1
ro.debuggable=1
...
persist.sys.usb.config=acm,hid,adb
...
In mkbootimg folder, repack the boot.img:
if [[ ! -d test ]]; then
echo "test folder not exist"
exit 1
fi
cd test
cd ramdisk
find . | cpio -o -H newc | gzip -9 > ../test.img-ramdisk-mod.gz
cd ..
../mkbootimg \
--kernel test.img-zImage \
--ramdisk test.img-ramdisk-mod.gz \
--cmdline "$(cat test.img-cmdline)" \
--board "" \
--base $(cat test.img-base) \
--pagesize $(cat test.img-pagesize) \
--kernel_offset $(cat test.img-kerneloff) \
--ramdisk_offset $(cat test.img-ramdiskoff) \
--second_offset $(cat test.img-secondoff) \
--tags_offset $(cat test.img-tagsoff) \
--header_version $(cat test.img-headerversion) \
--hash $(cat test.img-hash) \
-o "../test-mod-$(date +'%y%m%d-%H%M%S').img"
Use restore-bootimg in the diagnosis mode with dpt-tools.py
Or find a way upload the test-mod-<datetime>.img to the device, and then use:
dd if=<new boot.img file path> of=/dev/mmcblk0p8 bs=4M
If everything went smoothly, after rebooting the device, you shall be able to use adb shell to get into the device.