ucore arm9 porting
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Build ucore for goldfish

A setup building environment
0 download java 7 from Oracle  http://www.oracle.com/technetwork/java/javase/downloads/index-jsp-138363.html. now is  jdk-7u5-linux-x64.tar.gz. unzip it to /opt.
Now, java, javac, etc. will be in /opt/jdk1.7.0_05/bin
set env variable in /etc/profile
export JAVA_HOME=/opt/jdk1.7.0_05
export JRE_HOME=${JAVA_HOME}/jre
export PATH=$PATH:$JAVA_HOME/bin
1 setup arm-linux-gcc using arm-linux-gcc-4.4.3-20100728.tar.gz, and unzip it to /opt . 
Now, arm-linux-gcc,etc. will be in /opt/FriendlyARM/toolschain/4.4.3/bin

2 setup android-SDK
Download android-sdk_r20-linux.tgz from http://developer.android.com/sdk/index.html
unzip it to /opt. Now android, emulator-arm, etc. wil be in /opt/android-sdk-linux-r20/tools

set env variable in ~/.bashrc
export PATH=/home/devel/bin:$PATH:/opt/FriendlyARM/toolschain/4.4.3/bin:/opt/android-sdk-linux-r20/tools

$ android  //download some more SDKs. such as Android SDK Tools, Android SDK Platform-tools, SDK Platform, ARM EABI v7a System Image
$ android list  //find avalable targets

Available Android targets:
id: 1 or "android-16"
     Name: Android 4.1
     Type: Platform
     API level: 16
     Revision: 2
     Skins: QVGA, WXGA800, WXGA720, WSVGA, WQVGA400, WXGA800-7in, WVGA854, WVGA800 (default), HVGA, WQVGA432
     ABIs : armeabi-v7a
Available Android Virtual Devices:
    Name: tester
    Path: /home2/chy/.android/avd/tester.avd
  Target: Android 4.1 (API level 16)
     ABI: armeabi-v7a
    Skin: WVGA800

//create a AVD, will be in ~/.android/avd/tester.avd/
$ android create avd --name tester --target 1

3 install related tools from ubuntu 12.04 ,and setup libGL.so

$ sudo apt-get install git-core gnupg flex bison gperf build-essential \
  zip curl libc6-dev libncurses5-dev x11proto-core-dev \
  libx11-dev libreadline6-dev libgl1-mesa-glx \
  libgl1-mesa-dev g++-multilib mingw32  tofrodos \
  python-markdown libxml2-utils xsltproc zlib1g-dev
$ sudo ln -s /usr/lib/i386-linux-gnu/mesa/libGL.so.1 /usr/lib/i386-linux-gnu/libGL.so

B build ucore for goldfish

4 get newest ucore from github
$ git clone git://github.com/chyh1990/ucore-arch-arm.git

5 compile ucore

$ cd ucore; cp config.goldfishv7 .config ; make menuconfig


YOU should save the config

$ make sfsimg
YOU should get sfs.img in 
$ make 

6 run ucore for goldfish
$ emulator-arm -avd tester -kernel obj/kernel/kernel-arm.elf -qemu -serial stdio