Database Users

[Q] Kernel Development Help Needed

I have been trying for two days now and after searching and searching, I am asking for some help.
I had an idea of changing the SELinux status from enforcing to permissive. This needs to be done in the kernel.
So I downloaded Samsung SM-N9005 source files and built the kernel. I have the zImage.
I just need some help with getting, and unpacking a boot.img file, replacing the kernel with my zImage and repacking the kernel and ramdisk into a boot.img to flash.
I have tried mkbootimg and unmkbootimg among other tools.
I get the following warning:
Code:
*** WARNING ****
This image is built using NON-standard mkbootimg!
OFF_KERNEL_ADDR is 0xFE208100
OFF_RAMDISK_ADDR is 0x00200100
OFF_SECOND_ADDR is 0xFF100100
Please modify mkbootimg.c using the above values to build your image.
****************
I did a clockworkmod backup and used the boot.img from there. Is that correct procedure?
Please please please please someone with kernel knowledge give me a helping hand, it will make my day!

Send over your zImage and the stock boot.img, I can give it a try and explain how if it works.

designgears said:
Send over your zImage and the stock boot.img, I can give it a try and explain how if it works.
Click to expand...
Click to collapse
Ok here they are:
zImage: http://www.multiupload.nl/J9TP9YCV8H
stock boot.img: http://www.multiupload.nl/6FVBWOOYHX
Many Thanks

designgears said:
Send over your zImage and the stock boot.img, I can give it a try and explain how if it works.
Click to expand...
Click to collapse
[email protected]:~/Android-Kitchen-0.224/WORKING_mj7_9008$ unpack boot.img
Boot = boot.img
unmkbootimg version 1.2 - Mikael Q Kuisma <[email protected]>
Kernel size 8488008
Kernel address 0x8000
Ramdisk size 1335394
Ramdisk address 0x2000000
Secondary size 0
Secondary address 0xf00000
Kernel tags address 0x1e00000
Flash page size 2048
Board name is ""
Command line "console=null androidboot.hardware=qcom user_debug=31 msm_rtb.filter=0x3F"
*** WARNING ****
This image is built using NON-standard mkbootimg!
OFF_KERNEL_ADDR is 0xFE208100
OFF_RAMDISK_ADDR is 0x00200100
OFF_SECOND_ADDR is 0xFF100100
Please modify mkbootimg.c using the above values to build your image.
****************
Extracting kernel to file zImage ...
Extracting root filesystem to file initramfs.cpio.gz ...
All done.
---------------
To recompile this image, use:
mkbootimg --kernel zImage --ramdisk initramfs.cpio.gz --base 0x1dfff00 --cmdline 'console=null androidboot.hardware=qcom user_debug=31 msm_rtb.filter=0x3F' -o new_boot.img
---------------
5170 块
the zImage:https://mega.co.nz/#!uNY1gBzZ!L2qLYjEMQ-x9HRGl4GKs3XR8fTgCH0BBRvTuyfiKS5M
the boot.img:https://mega.co.nz/#!jIwhhboD!c2V21gS3DZIXsIKUUpaM6wIL_SZNzLmSRMqQw2Rn7G8
thanks

What happened ? what is the solution to this ?

Five years later ???

[KERNEL INFO] Solving Kernel boot problems / Blackscreen and Red blinking LED issue

This should go to especially the kernel devs here who does do kernels for our Z5 Premium
It seems Sony messed up something on their kernel so compilation of kernel is kinda more difficult for Z5P than for Z5
With this thread I want to explain what you need to know if you compile a kernel and packing it for the Z5 Premium
At first: The Kernel compilation
For the Z5P you need to use Google's stock Toolchain, I tried with UBERTC4.9 and didn't worked, Linaro isn't tested yet
Link to the Google Toolchain: https://android.googlesource.com/platform/prebuilts/gcc/linux-x86/aarch64/aarch64-linux-android-4.9/
Second: The packing of the kernel
On Z5P you need a special type of mkbootimg or it don't work, this tool is called mkqcdtbootimg
Here you have the already compiled one:
https://github.com/BlackSoulxxx/XerXes/mkqcdtbootimg
Credits to for the tool @BlackSoulxxx
If you want the source of this tool:
https://github.com/sonyxperiadev/mkqcdtbootimg
Then you have to keep attention: Kernel compression doesn't work properly so Image.gz and Image.gz-dtb doesn't work so you have to pack the kernel with the Image file only (Kernel file without any compression)
Then the command to pack the kernel:
Code:
mkqcdtbootimg --cmdline "androidboot.hardware=qcom user_debug=31 msm_rtb.filter=0x3F ehci-hcd.park=3 lpm_levels.sleep_disabled=1 boot_cpus=0-3 dwc3_msm.prop_chg_detect=Y coherent_pool=2M dwc3_msm.hvdcp_max_current=1500 androidboot.selinux=permissive enforcing=0" --base 0x00000000 --kernel arch/arm64/boot/Image --ramdisk <Path to your Ramdisk> --ramdisk_offset 0x02000000 --pagesize 4096 --dt_dir arch/arm64/boot/dts/qcom/ -o <Output destination path> --tags_offset 0x01E00000
(for making SELinux on enforcing remove androidboot.selinux=permissive enforcing=0 from cmdline)
This is tested on SunKernel made by @zacharias.maladroit (could be helpful for you)
Tested on my Z5P Dual E6833
I hope this can help someone
Your PDesire

PDesire said:
Then the command to pack the kernel:
Code:
mkqcdtbootimg --cmdline "androidboot.hardware=qcom user_debug=31 msm_rtb.filter=0x3F ehci-hcd.park=3 lpm_levels.sleep_disabled=1 boot_cpus=0-3 dwc3_msm.prop_chg_detect=Y coherent_pool=2M dwc3_msm.hvdcp_max_current=1500 androidboot.selinux=permissive enforcing=0" --base 0x00000000 --kernel arch/arm64/boot/Image --ramdisk <Path to your Ramdisk> --ramdisk_offset 0x02000000 --pagesize 4096 --dt_dir arch/arm64/boot/dts/qcom/ -o <Output destination path> --tags_offset 0x01E00000
Click to expand...
Click to collapse
I'm hoping this will help me because I have been having a non-booting kernel since r24 of 7.0 and r8 of 7.1.1! I also have a question about the Ramdisk since it wasn't exactly explained in the kernel guide Sony gives us. Is this the ramdisk.img from the out folder in the AOSP build?
Also would adding mkqcdtbootimg to the Boardconfig.mk file like it says on the sony github work so I can compile the whole thing in using the:
Code:
make -j#
command in the AOSP build guide? Or should I build the kernel separately?

[Tutorial]Kernel Post Compilation Guide; how to turn kernel into img

There are many great guides online on how to compile a kernel, but they often skimp on the last and most important part, how to get it into a working img. Therefore, without further ado, these are the steps
Prerequisites:
-Linux
-Good-ish command line experience
-Mkbootimg https://github.com/Team-DevElite/mkbootimg-python3
-you will need this https://forum.xda-developers.com/showthread.php?t=2073775
-Python 3
Step 1:
-Extract image kitchen
-Download a working kernel and extract boot image
-Place it into image kitchen's folder
-Type this into the terminal(of course, set permissions first)
Code:
./unpackimg.sh <boot image>
You will now get something similar to this.
Code:
BOARD_KERNEL_CMDLINE androidboot.hardware=qcom user_debug=31 msm_rtb.filter=0x237 ehci-hcd.park=3 lpm_levels.sleep_disabled=1 [email protected] coherent_pool=2M enforcing=0
BOARD_KERNEL_BASE 80000000
BOARD_NAME
BOARD_PAGE_SIZE 4096
BOARD_HASH_TYPE sha1
BOARD_KERNEL_OFFSET 00008000
BOARD_RAMDISK_OFFSET 02200000
BOARD_SECOND_OFFSET 00f00000
BOARD_TAGS_OFFSET 02000000
SAVE THE OUTPUT INTO A TEXT FILE
Step 2: Getting the Ramdisk
-Go to the folder, split_img
-Copy ramdisk.cpio.gz into a conveinient folder
Step 3:
Now, get the values from Step 1
-Seperate them like this and get rid of whitespace between the \s
Code:
--ramdisk <ramdisk location> \
--cmdline "androidboot.hardware=qcom user_debug=31 msm_rtb.filter=0x237 ehci-hcd.park=3 lpm_levels.sleep_disabled=1 [email protected] coherent_pool=2M enforcing=0" \
--base 0x80000000 \
--pagesize 4096 \
--ramdisk_offset 0x02200000 \
--tags_offset 0x02000000 \
Now Figure out the directory of your compiled kernel
64bit
Code:
arch/arm64/boot/
32bit
Code:
arch/arm/boot
Depending on your kernel, the kernel file will either be image-gz.dtb or zImage.
Either way its the same step.
Next, add this argument to the one we made above
Code:
--kernel <path to kernel output file>
Step 4 FINAL:
-Set the permissons for mkbootimg
-add this argument to the one above
Code:
--output boot.img
Now your arguments list should look something like this
Code:
--kernel <kernel file> \
--ramdisk <ramdisk file> \
--cmdline "androidboot.hardware=qcom user_debug=31 msm_rtb.filter=0x237 ehci-hcd.park=3 lpm_levels.sleep_disabled=1 [email protected]
coherent_pool=2M enforcing=0" \
--base 0x80000000 \
--pagesize 4096 \
--ramdisk_offset 0x02200000 \
--tags_offset 0x02000000 \
--output boot.img \
-cd into the directory containing mkbootimg
-Now add ./mkbootimg to the front of it and execute!
-Check that it looks something like this
Code:
./mkbootimg \
--kernel <kernel file> \
--ramdisk <ramdisk file> \
--cmdline "androidboot.hardware=qcom user_debug=31 msm_rtb.filter=0x237 ehci-hcd.park=3 lpm_levels.sleep_disabled=1 [email protected] coherent_pool=2M enforcing=0" \
--base 0x80000000 \
--pagesize 4096 \
--ramdisk_offset 0x02200000 \
--tags_offset 0x02000000 \
--output boot.img \
you should now see a boot.img generated
HIT Thanks if I helped
thanks to @osm0sis for his awesome tools!

Thanks for nice and easy guide

Manjot xda said:
There are many great guides online on how to compile a kernel, but they often skimp on the last and most
Thanks for nice and easy guide
Click to expand...
Click to collapse
Thank you, and please don't quote the op, please edit and shorten your post.
Regards
-LLJY

Sry mostly i use other forums there is no rule like don't quote whole op so ignore that post edited. Again nice tutorial

Missed the ramdisk flag while building the new image and my device failed to boot multiple times. Thanks for the detailed guide (pressed the button )!

Can you make a guide video ? And this can not work on Windows ?

shinigami_tsin said:
Can you make a guide video ? And this can not work on Windows ?
Click to expand...
Click to collapse
No to both

I know this is a rather old thread, but I just wanted to say thank you for this. I do a lot of modding and other tricks and hacks on Amazon Fire HD 10 (we were just recently able to unlock them) and it was nice to read a small and straight forward guide without anything being deleted or commented out. As such, I was able to use this method to make a fresh boot.img and it booted the very first time. It's an awesome feeling when that happens, given we often do more unintentional (or intentional) destruction to them.

Can't repack boot image

Hello,
I am trying to edit the boot.img (modified to not force encrypt the userdata) of my device.
I extracted the boot image with umkbootimage and then I extracted the initramfs with the following command:
Code:
gunzip -c ../initramfs.cpio.gz | cpio -i
Then i repacked the ramfs with the command (without changing nothing):
Code:
find . | cpio -o -H newc | gzip > ../new-ramdisk.cpio.gz
Finally, I repacked the boot image with mkbootimg and the following arguments:
Code:
mkbootimg --kernel zImage --ramdisk new-ramdisk.cpio.gz --base 0x0 --ramdisk_offset 0x002000000 --tags_offset 0x01e00000 --cmdline 'androidboot.hardware=angler androidboot.console=ttyHSL0 msm_rtb.filter=0x37 ehci-hcd.park=3 lpm_levels.sleep_disabled=1 boot_cpus=0-3' --pagesize 4096 -o new_boot.img
The new boot image won't boot up. When I use the original initramfs to create the boot image, everything works great.
Another issue is that after the repacking the size of the initramfs changed.
Someone have any idea what should I do?

@batman1010 you need that

Packing Boot.img Zenfone 3 ZE520KL

I've success compiling with gcc aarch64 4.9 for my zen3 and after it i'm packing with mkbootimg with command
mkbootimg --kernel Image --ramdisk boot-img.ramdisk.gz --cmdline "console=ttyHSL0,115200,n8 androidboot.console=ttyHSL0 androidboot.hardware=qcom msm_rtb.filter=0x237 ehci-hcd.park=3 lpm_levels.sleep_disabled=1 androidboot.bootdevice=7824900.sdhci earlycon=msm_hsl_uart,0x78af000" --base 0x80000000 --pagesize 2048 --kernel_offset 0x00008000 --ramdisk_offset 0x01000000 --second_offset 0x00f00000 -o new.img , but i've problem when flashing, boot.img not work , device is booting, but bootlop . Whether i'm wrong something ? i'm customing kernel for adding mode monitor . Anyone know how to fix it ? Thanks