[Galaxy S Plus I9001 Android Development] broodplank1337:
How to mod a stock kernel Tutorial (with Windows)

by: broodplank1337

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In this tutorial I will explain how to unsecure a kernel and how to add init.d / custom bootanimation support to a stock kernel, in this tutorial we will be using Cygwin as shell, with Dsixda's Android Kitchen.

Requirements:

- Cygwin with Packages and Dsixda's Android Kitchen

- JRE or JDK

- Winrar

- A stock Kernel

- Some common sense

Chapters:

1. Getting the kernel

2. Setting up Cygwin

3. Setting up the Kitchen

4. Modifying the Kernel

5. Testing results

Chapter 1. Getting the Kernel

Since the kernel that you are going to use is a stock kernel, it can be found within the latest stock firmware. for example for the i9001, I have this Odin flashable: "I9001XXKQE_I9001ATOKP3_I9001XXKPL_HOME.tar.md5". Open this file with Winrar and you will see the boot.img in there, just extract it and your currently done. It may also be a zImage!

Chapter 2. Setting up Cygwin

The Cygwin package you downloaded needs to be extracted, the default folder of a Cygwin installation is: "C:\cygwin". This is recommended in most cases. Once unpacked navigate to the "home" folder. In this home folder you need to create a folder that has the same username as your current windows username. Once you made that folder you have to extract the contents of "kitchen.rar" to that folder. So you will get a folder structure like this: C:\cygwin\home\username\kitchen

Chapter 3. Setting up Kitchen

Go to the original_update folder (located in: C:\cygwin\home\username\kitchen) and open dummyrom.zip with Winrar, now move your own boot.img inside the zip and choose "Store" as compression, Press ok to update the archive. If you have an zImage instead, please remove the boot.img from the archive first. Now browse to the system folder inside the archive and replace the build.prop with a build.prop from your phone. Also choose "Store" as compression and update the archive.

Starting the Kitchen:

1. Open Cygwin (X:\Cygwin\Cygwin.bat)

2. Once loaded, enter: "cd kitchen" > Enter

3. now type "sh menu" The kitchen menu will now start...​

Setting up a working folder:

1. Press 1 > Enter

2. Press Enter and wait...

3. Choose (1) dummyrom.zip > Enter

4. Choose "y" > Enter > Enter a new name (I chose WORKING_KERNEL) > Enter

(now wait until the zip is extracted)

5. Choose 2 > Enter

6. Enter to return to main menu​

Chapter 4. Modifying the Kernel

Unsecuring the kernel (to use properly with ADB)

1. Press 2 > Enter (to add root permissions)

2. Press "s" > Enter (now wait until the process is done)

3. Press Enter to return to main menu​

Adding init.d support (for using startup scripts in /system/etc/init.d)

1. Press 0 > Enter

2. Press 17 > Enter (to add init.d support)

3. Enter "y" > Enter (now wait until the process is done)

4. Press Enter to return to main menu​

Adding custom bootanimation support

Since the bootanimation support is already inside the dummyrom.zip file, you don't need to add it again.

Chapter 5. Testing the results

Now you will find a working boot.img / zImage under: C:\cygwin\home\username\kitchen\WORKING_KERNEL\

You can copy this file directly to your phone but it won't have bootanimation support.

That's why you need to enter in the Kitchen menu:

1. Press 99 > Enter

2. Press 1 > Enter

3. Press "n" > Enter

4. Press "y" > Enter

5. Press "y" > Enter > "EnterANewZipName" > Enter

6. Now your cwm zip will be located at: C:\cygwin\home\username\kitchen\OUTPUT_ZIP​

The zip that can be found in the directory above can be flashable in CWM. Ejoy your own stock kernel with init.d/bootanimation support!