Hi Marc,
Thanks for your help, with you guys' help, I found the problem, I wrongly
use the zImage as the --kernel file which should be the zImage-dtb instead
because hammerhead uses the device tree blob.
With the zImage-dtb, I successfully run my code.
Thank you again.
Regards
Deng
On Friday, February 14, 2014 1:21:34 AM UTC-8, Marc Marí wrote:
>
> Hello
>
> I'm experimenting on a Nexus 5 too, so probably I can help a bit:
> This is my mkbootimg command:
> mkbootimg --base 0x00000000 --ramdisk_offset 0x02900000 --second_offset
> 0x00F00000 --tags_offset 0x02700000 --cmdline 'console=ttyHSL0
> androidboot.hardware=hammerhead user_debug=31 maxcpus=2
> msm_watchdog_v2.enable=1 earlyprintk' --kernel zImage-dtb --ramdisk
> ramdisk.img -o boot.img
>
> The ramdisk image, I have it with the name .img, I suppose you have get it
> correctly, but some tips to get it:
> - Compile all Android Source Code. The image is in
> out/target/product/hammerhead/{kernel|ramdisk.img}
> - Get a valid boot.img and decompress using split_bootimage.pl (google
> for it)
>
> If this tips don't help you, probably is a problem when compiling. Tell me
> if so.
> Regards
> Marc
>
>
> 2014-02-13 7:35 GMT+01:00 deng zhou <dzhou...@gmail.com <javascript:>>:
>
>> Hi guys,
>>
>> I have a problem on compiling my kernel,
>>
>> I follow the http://source.android.com/source/building-kernels.html to
>> build my kernel
>> The kernel version is 3.4.0-gadb2201
>> my steps:
>>
>> git clone https://android.googlesource.com/kernel/msm.git
>>
>> export PATH=$PATH:~/nexus5/arm-eabi-4.6/bin
>>
>> $ export ARCH=arm
>>
>>
>> $ export SUBARCH=arm
>> $ export CROSS_COMPILE=arm-eabi-
>>
>>
>> $ cd msm
>> $ git checkout 3.4.0-gadb2201
>>
>>
>> $ make hammerhead_defconfig
>> $ make -j4
>>
>> I used the original code to test my methods. after successfully
>> compiling. I tried several ways to install the zImage to the device
>> 1) AnyKernel method, replace zImage file in the zip file and use the
>> recovery mode to install the update.
>> 2) within the AOSP project use
>>
>> export TARGET_PREBUILT_KERNEL=$your_kernel_path/arch/arm/boot/zImage
>>
>> and then make bootimg to generate the boot.img
>> 3) use the bootimg_tools to unpack the factory boot.img to get the
>> ramdisk.gz and paramters and then mkbootimg to make myboot.img
>> I followed this tutorial.
>> http://pete.akeo.ie/2013/10/compiling-and-running-your-own-android.html
>>
>> dzhou@ubuntu:~/nexus5/workspace$ unmkbootimg -i boot.img
>> kernel written to 'kernel' (8331496 bytes)
>> ramdisk written to 'ramdisk.cpio.gz' (498796 bytes)
>>
>> To rebuild this boot image, you can use the command:
>> mkbootimg --base 0 --pagesize 2048 --kernel_offset 0x00008000
>> --ramdisk_offset 0x02900000 --second_offset 0x00f00000 --tags_offset
>> 0x02700000 --cmdline 'console=ttyHSL0,115200,n8
>> androidboot.hardware=hammerhead user_debug=31 maxcpus=2
>> msm_watchdog_v2.enable=1' --kernel kernel --ramdisk ramdisk.cpio.gz -o
>> boot.img
>>
>> mkbootimg --base 0 --pagesize 2048 --kernel_offset 0x00008000
>> --ramdisk_offset 0x02900000 --second_offset 0x00f00000 --tags_offset
>> 0x02700000 --cmdline 'console=ttyHSL0,115200,n8
>> androidboot.hardware=hammerhead user_debug=31 maxcpus=2
>> msm_watchdog_v2.enable=1' --kernel myzImage --ramdisk ramdisk.cpio.gz -o
>> myboot.img
>>
>> fastboot flash boot myboot.img
>>
>> All of these methods make the boot.img or update.zip without error. But I
>> can't turn on or reboot the device after flash the boot.img
>> I have tried downloaded boot.img and the nexus 5 restart successfully,
>> Thus, I guess I miss something at compiling step.
>>
>> I have successfully run my own kernel code with goldfish on emulator and
>> I encountered the wrong defconfig problem at the beginning, So I also tried
>> msm8974_defconfig but failed again.
>>
>> Can anyone help me to figure out my problem ?
>> thanks for any help, I am seriously need this environment to conduct my
>> experiment.
>>
>> Deng
>>
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