I have unpacked and repacked the files contained inside your boot.img file. Did I do everything correct or not ?

[Marietto2008]

Hello,

I have unpacked and repacked files from your boot.img file. I have unpacked the files stored inside this boot.img file :

https://github.com/raspiduino/a6lte-kvm/releases/download/0.01/boot.tar

and I've used a tool called "unpackbootimg" that I've got from this link :

https://github.com/osm0sis/mkbootimg

this is how I have extracted the files from the boot.img file :

# /mnt/zroot2/zroot2/OS/Android-KVM/Galaxy-A6/osm0sis-mkbootimg# mkdir boot
# ./unpackbootimg -i /mnt/zroot2/zroot2/OS/Android-KVM/Galaxy-A6/Boot-Files/boot-orig.img -o boot

this is what happened :

ANDROID! magic found at: 0
BOARD_KERNEL_CMDLINE androidboot.selinux=permissive
androidboot.selinux=permissive
BOARD_KERNEL_BASE 0x10000000
BOARD_NAME SRPRA31B008KU
BOARD_PAGE_SIZE 2048
BOARD_HASH_TYPE sha1
BOARD_KERNEL_OFFSET 0x00008000
BOARD_RAMDISK_OFFSET 0x01000000
BOARD_SECOND_OFFSET 0x00f00000
BOARD_TAGS_OFFSET 0x00000100
BOARD_OS_VERSION 10.0.0
BOARD_OS_PATCH_LEVEL 2021-03
BOARD_DT_SIZE 509952

then I have removed the old kernel and I have replaced it with a new kernel re-compiled by me,where I have enabled KVM. At this point,I have repacked the files previously extracted and this is how I did that :

cd /mnt/zroot2/zroot2/OS/Android-KVM/Galaxy-A6/Boot-Files/boot/

mkdir ./ramdisk

cd ./ramdisk/

gzip -dc ../boot.img-ramdisk.gz | cpio -imd

find . ! -name . | LC_ALL=C sort | cpio -o -H newc -R root:root | gzip > ../new-boot.img-ramdisk.gz

mkbootimg
--kernel ./boot.img-kernel
--ramdisk ./new-boot.img-ramdisk.gz
--dtb ./boot.img-dt
--cmdline "$(cat ./boot.img-cmdline)"
--base "$(cat ./boot.img-base)"
--kernel_offset "$(cat ./boot.img-kernel_offset)"
--ramdisk_offset "$(cat ./boot.img-ramdisk_offset)"
--second_offset "$(cat ./boot.img-second_offset)"
--os_version ./boot.img-os_version
--os_patch_level ./boot.img-os_patch_level
--tags_offset "$(cat ./boot.img-tags_offset)"
--board ./boot.img-board
--pagesize "$(cat ./boot.img-pagesize)"
--output ./new-boot.img

I would like to know if I did everything correctly. I didn't see any error,but I'm not sure to have done the whole procedure correctly. Thanks.

[raspiduino]

I use the libmagiskboot in https://github.com/topjohnwu/Magisk, so I haven't test your way of repacking. But it seems to be correct. You can just test your repacked image, if it boots and you have done thing correctly :)). If it does not, you can just fallback to use libmagiskboot.

[Marietto2008]

I didn't use magiskboot because it does not work on Ubuntu. This point is not clear on your tutorial. How to do "magiskboot unpack boot.img" if I don't have any magiskboot on ubuntu ? Did you do this operation while you ran Android ? Did you run an Android emulator for Linux ? Did you install termux on Android to issue that command ? Can you you be clearer on these points on your instructions ? thanks.

[raspiduino]

Magisk has some native static linked binary for x86 packed inside their apk. Download the magisk's apk, unzip it, look inside lib/ and you will find some x86 binary. There will be libmagiskboot.so. Just run it like a normal Linux executable (./libmagiskboot.so)

[raspiduino]

[Marietto2008]

There aren't no binary inside the folder lib/x86 :

[Marietto2008]

No executables inside lib/x86_64 :

[Marietto2008]

Can you attach the missing executables here ? thanks.

The tutorial suggests to run magiskboot,but I don't have this executable.

Step 8: You need to extract the stock boot.img from stock rom. You can get stock rom from samfw.com or from my release page :). Then use magiskboot to unpack boot.img, replace stock kernel with our compiled Image in arch/arm64/boot/Image and repack boot.img using magiskboot repack boot.img new-boot.img

[raspiduino]

There aren't no binary inside the folder lib/x86 :

chmod +x libmagiskboot.so and then ./libmagiskboot.so [sth]

[Marietto2008]

---> chmod +x libmagiskboot.so and then ./libmagiskboot.so

can you explain this on your tutorial ? I didn't know that the .so files could be executable. I know that they are only libraries. Excuse me for my ignorance. But maybe not everyone knows that this can be done.

[raspiduino]

can you explain this on your tutorial ? I didn't know that the .so files could be executable. I know that they are only libraries. Excuse me for my ignorance. But maybe not everyone know that this can be done.

My bad. I should have written that.