Since this is in the Moto G (Falcon) forum, these steps are for the Falcon. This does not mean that it isn't the same for other phones! Even if you don't own a Falcon device, feel free to ask for help here!
Prerequisites:
- You must have a Linux firmware running on your computer (I suggest Builduntu because you can skip the next one [build environment setup])
- Build environment setup (Put the this in terminal and follow instructions)
- Patience and a heart willing to learn
- You need to know the languages C, C++, Java, Ruby, Python... NOT! You don't need to know ANY coding languages.
[MOTIVATIONAL SPEECH]
Truth be told, when I first started out developing, I knew NO coding languages except for HTML and a little bit of Java. Both have nothing to do with kernels! I actually learned how to do this when I suffered from a concussion. So if you really want to learn how to kernel dev and you give up halfway, just know that a 14 year old kid with a concussion beat you .
[/MOTIVATIONAL SPEECH]
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Click to collapse
WARNING: I am not responsible for any damages to your phone or computer or pet unicorn. When you modify the wrong partitions, set too many jobs for your compiler etc., that is not anyone's fault but yours.
Your Personal Handbook to the Following:
- Anything inside "CODE" boxes, type it into your terminal. If you can't find terminal, then press CTRL, ALT, t.
- If I were you, I would write these by hand instead of copying and pasting it because after a certain amount of times, you will remember the linux commands and it will be easier for you to compile more kernels for different devices
- Use this thread as a "Help Me" button. Ask for help!
Click to expand...
Click to collapse
A New Beginning:
Let's start out with something simple, getting the actual code:
Code:
git clone https://github.com/cyanogenmod/android_kernel_motorola_msm8226
This could range from 3 minutes to 2 hours! Read a book, count your fingers, watch ****, and wait patiently.
Once that's done, open up your file manager and rename the folder (should be android_kernel_motorola_msm8226) to whatever you want. I will refer it as "mykernel".
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Pokemon!
For this tutorial, we will be using a Sabermod 4.7 toolchain to compile. I WOULD teach you how to compile with 4.8+, but it creates errors that will take even longer for me to write about sooooooooo :fingers-crossed:. Now to get the toolchain:
Code:
git clone https://github.com/SaberMod/android_prebuilts_gcc_linux-x86_arm_sabermod-arm-eabi-4.7
Rename this to whatever you like, but I will be referring this as "toolchain"
Now go into you folder where the kernel source is stored...
Code:
cd mykernel
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Almost done :
Time to set-up the compiler!
Code:
export CROSS_COMPILE=/home/*your linux name*/toolchain/bin/arm-eabi-
This tells the toolchain that "OK, we want to make ALL this code here into a kernel".
This next line tells it that your defconfig (the toolchain's manual for compiling the kernel) that it's in the arch/arm/configs folder.
Code:
export ARCH=arm
Now to tell the it what the defconfig is!
Code:
make falcon_defconfig
Hehe, now to the hardest part of all...
MuHAHHAHAHa
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THE HARD PART
You ready for this? HERE IT IS! TIME TO BUILD THE KERNEL!
Code:
make -j4
Now sit back, relax, and watch the code! Or you could read a book, watch ****, count your fingers, play with your toes...
If you have an error during the waterfall of code, find the part where it actually says *error* (you'll probably have to scroll upwards) and search it on Google or post it here.
Click to expand...
Click to collapse
THE EASY PART
If you manage to get something that says "the kernel zImage is ready" or something like that, that means you've made it!
You have officially compiled your own kernel from source! Now you need to put it in a flashable zip.
Download this file and open it up, but DON'T EXTRACT IT.
Now go to your kernel source then "CTRL + F" and search for "zimage-dtb".
Find it and put it in the "kernel" folder of "FalconKernel - Signed.zip". Then "CTRL + F" and search ".ko".
Copy radio-iris-transport.ko and put it in the system/lib/modules (not pronto) of the zip.
Then find wlan.ko and rename it to pronto_wlan.ko. Copy and paste it in system/lib/modules/pronto of the zip.
Click to expand...
Click to collapse
Now you can put it on your phone and flash it!
Reserved
Here I will walk you through on how to add the intelliplug feature made by @faux123
First, fetch my Green Machine kernel source (go into your kernel folder in terminal):
Code:
git fetch https://github.com/YoshiShaPow/green_machine_falcon
Then you could cherry-pick (basically copy) all my cherry picks for intelliplug from my source.
If you do check my source out, you can see there's a little link to a history of commits near the middle of the screen, right above the files/folders. You can see at this page of my features history, you'll see a bunch of commits for intelliplug. I will use those commits and copy it to your own kernel.
This copies the initial coding/first commit of intelliplug!
Code:
git cherry-pick 01a850f
This cherry-picks the remaining commits so that your newly added intelliplug is updated.
Code:
git cherry-pick 6623f2f^..4e1ece7
One more thing though, you need to add the line to compile intelliplug!
Almost all things compiled along with the zImage are in a file called defconfig. What a defconfig does, is tell your machine to build certain modules, kernel objects, drivers, governors, etc.etc.etc.. Now, all of them are found in the folder
arch/arm/configs
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Click to collapse
As stated in the OP, you have to modify the defconfig you use. (CM11 Kernel is falcon_defconfig, Gummy Kernel is msm8226_mmi_defconfig). Open up the corresponding defconfig and add this to ANY line anywhere.
Code:
CONFIG_INTELLI_PLUG=m
Now, for those who are familiar with "y=yes/n=no/m=maybe", you'll see that I specifically told you to put the "m=maybe" one. That's because when you compile the kernel again, right after you're about to start your build. Since you put that "m", the terminal will prompt you with a "y=yes/n=no" question on whether or not you would like to add the following feature. Since you would like to add the feature, put in "y". Later on when you feel more comfortable with adding features to your kernel, you can go back into the defconfig and put it as
Code:
CONFIG_INTELLI_PLUG=y
So that it will compile it without asking, since you have given it an answer.
Now you have officially compiled a "Custom Kernel" and with the knowledge you know, you could create a feature packed one by just kanging (copying one's work/features).
Always remember to
Code:
make clean && make mrproper
after every build to prevent errors and such!
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One More
One more
Nice guide!
I think it lacks one thing- how to modify the kernel.
The guide only mentions how to compile a preconfigured kernel, just the way it is. Modding kernels and adding new features (like OC, schedulers, s2w etc.) is the cool part about making a kernel yourself IMO.
Just a suggestion.
Sent from my XT1033 using XDA Premium 4 mobile app
KDB223 said:
Nice guide!
I think it lacks one thing- how to modify the kernel.
The guide only mentions how to compile a preconfigured kernel, just the way it is. Modding kernels and adding new features (like OC, schedulers, s2w etc.) is the cool part about making a kernel yourself IMO.
Just a suggestion.
Sent from my XT1033 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
Well, I will be putting the reserve posts to good use later
What would be the best way to test a kernel w/o bricking the phone?
adizz4 said:
What would be the best way to test a kernel w/o bricking the phone?
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You can't brick a phone with an unmodified kernel!
Oops double post
adizz4 said:
What would be the best way to test a kernel w/o bricking the phone?
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Does "fastboot boot kernel.img" work from bootloader mode?
Also why wouldn't the any kernel zip work if I decompressed and compressed it again. I did that before this thread and it didn't work.
P.Kosunen said:
Does "fastboot boot kernel.img" work from bootloader mode?
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I've been using that to test. Its a really good way but you'll have to build a boot.img
adizz4 said:
Also why wouldn't the any kernel zip work if I decompressed and compressed it again. I did that before this thread and it didn't work.
I've been using that to test. Its a really good way but you'll have to build a boot.img
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Click to collapse
I specifically said in the tutorial nor to unzip it... The zip is already signed (a prerequisite for flashing) and unzipping will break it.
Did we need sudo before make -j4 command?
Sent from my XT1032
Siekil said:
Did we need sudo before make -j4 command?
Sent from my XT1032
Click to expand...
Click to collapse
Not necessary
I'll be writing more posts on how to add features to your kernel and basic cherry-picking features
I syncd gummy kernel sources and tried to build using linaro and sm but I keep getting this error.
sound/soc/msm/msm8226.c:30:40: fatal error: qdsp6v2/msm-pcm-routing-v2.h: No such file or directory
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Any inputs on that?
adizz4 said:
I syncd gummy kernel sources and tried to build using linaro and sm but I keep getting this error.
Any inputs on that?
Click to expand...
Click to collapse
Probably a gcc error... I'd try compiling with a 4.7 toolchain. And also, make sure you're using the msm8226_mmi_defconfig since gummy's different
@YoshiShaPow thanks for the guide. I'm using it to begin fooling around with some building.
May I be a pain in the *** and ask you for a lil help? If using the file you provided to insert the build, I get trouble with wifi (in latest Aospa). I don't expect you to solve that, but I was wondering how to make out of the zimage a boot.img file, but I've read around the ramdisk needs to be merged into that, and honestly I'm not so sure how to do that. I found some guides, but none of them is specific for falcon, so I might be goofing around if I follow them?
Also checked the flashing script in the file you provided and noticed that it makes a boot.img on the go, but couldn't figure out how to reproduce that either.
If what I'm asking is too hard or long to be answered , I understand :good:
Edit: now I tried building with Linaro and after sorting out a couple of errors, voilá, I got a build. But again, my wifi gets smashed. Everything else seems to work fine, but when I try to turn wifi on, it's dead, nothing happens. My ideas: could it be something about the way the kernel's flashed skipping a boot.img (ramdisk?)? Is it something about AOSPA (think it shouldn't since it uses CM kernel)? Or should I be looking into my build, making a logcat about the issue and working it back?
fermasia said:
@YoshiShaPow thanks for the guide. I'm using it to begin fooling around with some building.
May I be a pain in the *** and ask you for a lil help? If using the file you provided to insert the build, I get trouble with wifi (in latest Aospa). I don't expect you to solve that, but I was wondering how to make out of the zimage a boot.img file, but I've read around the ramdisk needs to be merged into that, and honestly I'm not so sure how to do that. I found some guides, but none of them is specific for falcon, so I might be goofing around if I follow them?
Also checked the flashing script in the file you provided and noticed that it makes a boot.img on the go, but couldn't figure out how to reproduce that either.
If what I'm asking is too hard or long to be answered , I understand :good:
Edit: now I tried building with Linaro and after sorting out a couple of errors, voilá, I got a build. But again, my wifi gets smashed. Everything else seems to work fine, but when I try to turn wifi on, it's dead, nothing happens. My ideas: could it be something about the way the kernel's flashed skipping a boot.img (ramdisk?)? Is it something about AOSPA (think it shouldn't since it uses CM kernel)? Or should I be looking into my build, making a logcat about the issue and working it back?
Click to expand...
Click to collapse
Sorry, I wanted to wait till I could use a computer to respond.
You must be missing the *.ko files:
You have officially compiled your own kernel from source! Now you need to put it in a flashable zip.
Download this file and open it up, but DON'T EXTRACT IT.
Now go to your kernel source then "CTRL + F" and search for "zimage-dtb".
Find it and put it in the "kernel" folder of "FalconKernel - Signed.zip". Then "CTRL + F" and search ".ko".
Copy radio-iris-transport.ko and put it in the system/lib/modules (not pronto) of the zip.
Then find wlan.ko and rename it to pronto_wlan.ko. Copy and paste it in system/lib/modules/pronto of the zip.
Click to expand...
Click to collapse
kernel for x86 device [Asus zenfone5] can be made using this method?
YoshiShaPow said:
Sorry, I wanted to wait till I could use a computer to respond.
You must be missing the *.ko files:
Click to expand...
Click to collapse
Uhm, no, I followed that part step by step. I did it once more to double check, and I'm still in the same place. Actually, I suspected something and tried your kernel (TGM) and had the same problem (WTF?). I need to try wiping everything and reinstalling aospa to make sure there isn't some other thing going on down there.
But it's ok, I'll figure it out somehow. What I'd really need if you can point me in the right direction, si how to step further into building a boot.img
Or for that I MUST follow the official CM method, meaning syncing the full repo and building just the kernel?
Thanks for your help!
---------- Post added at 10:42 AM ---------- Previous post was at 10:18 AM ----------
sanjib734 said:
kernel for x86 device [Asus zenfone5] can be made using this method?
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Click to collapse
I'd guess it's not about the method. I think there's no CM official support for this device. Do you have any unofficial source to build from (Github)? If so, I guess you could try.
Edit: should check if Sabermod is compatible with the device's arch too.
Hey guys, I downloaded the LG D800 lollipop source files from the opensource LG site, and I was trying to build it.
From my understanding, the instructions.
Code:
1. Android build
- Download original android source code ( Lollipop 5.0.1_r1 ) from http://source.android.com
- Untar opensource packages of LGD800_L_Android.tar.gz into downloaded android source directory
a) tar -xvzf LGD800_L_Android.tar.gz
- And, merge the source into the android source code
- Run following scripts to build android
a) source build/envsetup.sh
b) lunch 1
c) make -j4
- When you compile the android source code, you have to add google original prebuilt source(toolchain) into the android directory.
- After build, you can find output at out/target/product/generic
2. Kernel Build
- Uncompress using following command at the android directory
tar xvzf LGD800_L_Kernel.tar.gz
- When you compile the kernel source code, you have to add google original prebuilt source(toolchain) into the android directory.
- Run following scripts to build kernel
a) cd kernel
b) export PATH=$PATH:tools/lz4demo
c) make ARCH=arm CROSS_COMPILE=../prebuilts/gcc/linux-x86/arm/arm-eabi-4.8/bin/arm-eabi- g2-att-perf_defconfig zImage -j4
* "-j4" : The number, 4, is the number of multiple jobs to be invoked simultaneously.
* lz4demo : More information can be found at "https://code.google.com/p/lz4/"
- After build, you can find the build image(zImage) at arch/arm/boot/
3. how to build chromium34_lge (vendor\lge\external\chromium34_lge\src),
please refer to README.txt at the folder mentioned above.
say to build the AOSP_ARM generic image.
I am building it now, and it did include the make files for the vendor directories. But I am wondering if this is actually going to work, and if it's missing anything?
If someone has ever done this before, and can accurately describe the process I would appreciate it.
I understand it as download android>extract the files to that directory and "Merge"(Overwrite?) the files, then run the envsetup, lunch for AOSP_ARM and make.
I don't understand what this line means "When you compile the android source code, you have to add google original prebuilt source(toolchain) into the android directory."
I also don't understand what the Chromium34_LGE thing is, and what it's for.
If anyone can shine some information on this, I would really appreciate it. Thanks!
Download site instructions, file size, and Linux knowledge
Silentwidow said:
Hey guys, I downloaded the LG D800 lollipop source files from the opensource LG site, and I was trying to build it.
- Download original android source code ( Lollipop 5.0.1_r1 ) from http://source.android.com
Click to expand...
Click to collapse
Go to http://opensource.lge.com, and search for LGD800. The downloaded file named LGD800_Lollipop_Android_D800_v30f.zip is a 633,894KB file containing LGD800_L_Android.tar.gz 505,244 KB and LGD800_L_Kernel.tar.gz 133,042 KB. When both are extracted the result is over 2GB of files and folders.
To build you'll need a Linux OS and be very knowledgeable with Linux commands and file structures.
As for a prebuilt, there is one buried in the folders at LGD800_L_Android.tar.gz\LGD800_L_Android.tar\android\vendor\lge\prebuilt\LGBackup\tar\LGBackup_tar.zip\
I don't know if there is another prebuilt in the LGD800_L_Kernel.tar.gz because I didn't look. Linux is far out of my reach, so I'll stay away from build scripts and makefiles...etc..