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 <[email protected]>:
> 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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