iceBear67 / android_kernel_exynos9810_kernelsu

for exynos 9810 chips, like Galaxy Note9 (N/F). Not actively maintained, use at your own risk.

KernelSU for Exynos9810

Supports Galaxy Note9 (N960N) or other model with Exynos 9810.
Not actively maintained. Use at your own risk.

Some changes:

• Removed all warning-as-error (To pass compiler, I'm newbie in android kernels)
• Removed -mgeneral-regs-only (I don't know if there are some side-effects)
• Changed version (4.9.X-Kr0nus built by icybear, may break some strict semver parsers lol)
• KernelSU modifications (according to the official documentation, I haven't test Kprobe yet.)

Build the kernel

Essential tools should be installed beforehand.

Or download image directly from Releases.

note

For arch users: sudo pacman -Sy base-devel git

Follow these instructions:

git clone https://github.com/iceBear67/android_kernel_exynos9810_kernelsu exynos9810_ksu
cd exynos9810_ksu

export ARCH=arm64 # architecture
export ANDROID_MAJOR_VERSION=q # according to the Samsung documentation, but it doesn't matters.

make mrproper # clean up
make $CODENAME # where CODENAMEs are found in arch/arm64/configs. Like `exynos9810-crownlte_defconfig`
make menuconfig # this will open a TUI where you can adjust the settings.
# For this kernel, you need to set the `cross compiler prefix` which is in `General Setup`.
## Run this command to get the value: `echo $(pwd)/toolchain/aarch64-linux-android-8.x/bin/aarch64-linux-android-`.

# Or use this instead:
export CROSS_COMPILE=$(pwd)/toolchain/aarch64-linux-android-8.x/bin/aarch64-linux-android- # I haven't tried this.

After proper configuration:

make -j{CPU_CORE} # CPU_CORE is the number of compiler threads, should be the number of processors.

Once successfully built, the kernel image can be found in arch/arm64/boot/Image

Build boot.img

The Image you got in the last step isn't an image file that can be flushed directly into BOOT.

Use android-image-kitchen to create the flushable one.

Getting the original boot.img from your phone

Boot your phone into TWRP.

adb shell # connect to your phone
dd if=/dev/block/by-name/BOOT of=/sdcard/boot.img # type this into adb shell
exit # quit adb shell
adb pull /sdcard/boot.img

Repack

mkdir kitchen
mv boot.img kitchen/
cd kitchen
unpackimg.sh ./boot.img # this script comes from android-image-kitchen
cp /path/to/Image/you/built ./split_img/boot.img-kernel

# Make sure SELinux is enforced
echo "androidboot.selinux=enforcing" > ./split_img/boot.img-cmdline 
# btw, selinux is enforcing by default unless you change something in the previous steps.
repackimg.sh # also comes from android-image-kitchen too.

Then you will get an image-new.img, which can be flushed into your phone by Heimdall.

note

You'd better dump a stock one or Magisk might annoy you.

Flush boot.img

See the KernelSU Documentation if you already have root access.

If not, use heimdall (bootloader must be unlocked first.)

Using Heimdall

Reboot your phone into Download mode.

warning

Back up your boot.img first!

heimdall flash --BOOT ./image-new.img

Once complete, your phone will reboot and should succcessfully boot into the system. It's a good idea to install TWRP first, in case you run into Bootloop issues.

Maybe some questions

KernelSU is incompatible with Magisk's module system.

Use magisk or uninstall magisk in it's manager application.

I don't have a backup

Use mine: https://github.com/iceBear67/android_kernel_exynos9810_kernelsu/releases/download/v0.7.4/boot-original.img