Build Android Kernel && Kernel Module

標籤：

I Build Android Kernel (with Module enabled)

    1. Kernel source is under android_src/kernel folder

    2. Config file is under kernel_src/arch/arm/configs folder xxx_deconfig

    3. setup config:

        $make ARCH=arm CROSS_COMPILE=arm-eabi- xxx_defconfig

        (.config file can also be created from device:

          adb pull proc/config.gz

          zcat config.gz > .config

        )

    4. enable module:

        $make ARCH=arm CROSS_COMPILE=arm-eabi- modules_prepare

    5. build kernel:

        $make ARCH=arm CROSS_COMPILE=arm-eabi- -jX

    [Error in compiling kernel:]

    [error1 : ]

　　　　drivers/scsi/ufs/ufs_test.c:25:19: fatal error: ../sd.h: No such file or directory
　　　　#include <../sd.h>
　　SOLUTION:
            --- Kernel2/drivers/scsi/ufs/ufs_test.c 2014-09-18 14:37:07.000000000 +0800

            +++ Kernel/drivers/scsi/ufs/ufs_test.c 2014-11-02 10:18:05.282973816 +0800

           @@ -22,7 +22,7 @@

           #include <scsi/scsi_device.h>

           #include <scsi/scsi_cmnd.h>

           #include <scsi/scsi_host.h>

          -#include <../sd.h>

          +#include "../sd.h"

           #include "ufshcd.h"

           #include "ufs.h"

    [error2 : ] 

            In file included from drivers/video/msm/mdss/mdss_mdp_trace.h:260:0,
                 from drivers/video/msm/mdss/mdss_mdp.c:61:
            include/trace/define_trace.h:79:43: fatal error: ./mdss_mdp_trace.h: No such file or directory
            #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)

　　SOLUTION:

            --- Kernel2/drivers/video/msm/mdss/mdss_mdp_trace.h 2014-09-18 14:37:12.000000000 +0800

            +++Kernel/drivers/video/msm/mdss/mdss_mdp_trace.h 2014-11-02 10:31:53.000000000 +0800

           @@ -17,7 +17,7 @@

           #undef TRACE_SYSTEM

           #define TRACE_SYSTEM mdss

           #undef TRACE_INCLUDE_PATH

           -#define TRACE_INCLUDE_PATH .

           +#define TRACE_INCLUDE_PATH ../../../../drivers/video/msm/mdss

           #undef TRACE_INCLUDE_FILE

           #define TRACE_INCLUDE_FILE mdss_mdp_trace

 

II Build Module　　1. Makefile:

        VERSION = 3
        PATCHLEVEL = 10
        SUBLEVEL = 40
        EXTRAVERSION = -xxxxxx
        EXTRA_CFLAGS=-fno-pic
        obj-m += xxxx.o
        KDIR=src_to_android_src/source/kernel
        PWD := $(shell pwd)
        CCPATH := src_to_ndk/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin
　　default:

　　　　make -C $(KDIR) ARCH=arm CROSS_COMPILE=$(CCPATH)/arm-linux-androideabi- SUBDIRS=$(PWD) modules
　　clean:

　　　　make -C $(KDIR) ARCH=arm CROSS_COMPILE=$(CCPATH)/arm-linux-androideabi- SUBDIRS=$(PWD) clean

　　2. VERSION in Makefile:

　　Kernel version can be found using the following command

       $ adb shell

       $ cat /proc/version

 

       3. after build, adb push ...ko /sdcard/;  adb shell; insmode ...ko

           dmesg see log

 

 

Reference:

　　[1] https://github.com/marco-pratesi/android/blob/master/HOWTOs/Android-Build-Kernel-Modules-HOWTO.txt

　　[2] http://forum.xda-developers.com/showthread.php?t=1585289

　　[3] http://forum.xda-developers.com/note-4/snapdragon-dev/sm-n910f-twrp-2-8-1-0-t2923509/page3

　　[4] https://www.movzio.com/howto/compile-android-kernel-source-beginners-guide-2/

　　[5] http://forum.xda-developers.com/showthread.php?t=1236576

Build Android Kernel && Kernel Module