因为是客户的要求，需要移植Java虚拟机到EM2440开发板，已经验证成功，为此记录下来。 1、解压 # unzip phoneme_advanced-mr2-dev-src-b97-20_nov_2008.zip
文件phoneme_advanced-mr2-dev-src-b97-20_nov_2008.zip下载地址： http://download.java.net/mobileembedded/phoneme/advanced/phoneme_advanced-mr2-dev-src-b97-20_nov_2008.zip

2、修改makefile  #cd phoneme_advanced_mr2/cdc/build/linux-arm-generic
 #gedit GNUmakefile   修改CVM_TARGET_TOOLS_PREFIX=/usr/local/arm/4.3.2/bin/arm-linux-为自己的交叉编译器的地址。 修改 USE_AAPCS ?= false 为 true。   3、输出PATH #gedit /etc/profile 在profile末尾添加：export PATH=/usr/local/arm/4.3.2/bin/:$PATH为自己的交叉编译器的地址。 4、 编译 #make  （可能会报错）
5、如果有出错提示可能是JDK、bison、flex没有安装 Java 的安装配置参考http://www.oracle.com/index.html， 或者在Ubuntu的新立德软件包中搜索Open Jdk。
另外的一两个工具可以通过在终端中通过一下命令安装：
  #apt-get installbison
  #apt-get install flex   6、可能出错  ../../src/linux-arm/javavm/runtime/segvhandler_arch.c:45:26:error: asm/ucontext.h: No such file or directory
    ../../src/linux-arm/javavm/runtime/segvhandler_arch.c:In function 'handleSegv':
    ../../src/linux-arm/javavm/runtime/segvhandler_arch.c:224:error: dereferencing pointer to incomplete type
    ../../src/linux-arm/javavm/runtime/segvhandler_arch.c:285:error: dereferencing pointer to incomplete type
    ../../src/linux-arm/javavm/runtime/segvhandler_arch.c:285:error: dereferencing pointer to incomplete type
    ../../src/linux-arm/javavm/runtime/segvhandler_arch.c:286:error: dereferencing pointer to incomplete type
    ../../src/linux-arm/javavm/runtime/segvhandler_arch.c:294:error: dereferencing pointer to incomplete type
修改segvhandler_arch.c 文件
    #gedit../../src/linux-arm/javavm/runtime/segvhandler_arch.c 修改 #define ucontext asm_ucontext
    #include
    为
    //#defineucontext asm_ucontext     //注释掉这句
    #include            //去掉arm/
7、再编译  #make  编译成功！   ls可以看到当前的目录下有这三个文件和文件夹：    lib   bin   testclasses.zip 附注：
运行时如有报错：
Java VM panic: AAPCS calling convention used; compilation must use –DAAPCS
然后，如果不在GNUmakefile之中添加 “CVM_DEFINES += -DAAPCS”这一行，就会 EM2440的linux 中执行 ./cvm -cp ../testclasses.zip HelloWorld 语句时，出现以下错误：
Java VM panic: AAPCS calling convention used; compilation must use -DAAPCS.

所以，除了要在GNUmakefile之中，修改USE_AAPCS ?= false为true，还要在CVM_DEFINES += 这一句后面添加上 -DAAPCS。 修改完上面的内容以后，要先执行makeclean&&make distclean，最后再执行make。 8、测试 1)复制上面的三个文件和文件夹到/home/sky/目录。 2)、在开发板/etc/init.d/rcS文件里加入如下：
        JAVA_HOME=/home/sky
        exportPATH=$JAVA_HOME/bin:$PATH
        export CLASSPATH=.:$JAVA_HOME/lib 3)、经典的HelloWorld。 #cd /home/sky/bin/ #./cvm -cp ../testclasses.zip HelloWorld 可以看到输出了 HelloWorld. 4)、全面测试。
 # ./cvm-cp ../testclasses.zip Test
        *Number of command line arguments: 0
        Starting test1
        ...recurse
        ...recurse
        ...recurse
        ...link
        ...link
        ...link
        Starting test1 again
        ...recurse
        ...recurse
        ...recurse
        ...link
        ...link
        ...link
        test6: Caught inner java.lang.NullPointerException
        test6: Caught outerjava.lang.NullPointerException
        Testing Array Copy
        *TestE exception thrown because"I'm feeling Testy"
        * threwjava.lang.ExceptionInInitializerError
        * threwjava.lang.NoClassDefFoundError: StaticE
        c1 = class [LTest;
        c2 = class [[LTest;
        c3 = class [LC;
        c4 = class [[LC;
        c1.modifiers = 1041
        c2.modifiers = 1041
        c3.modifiers = 1040
        c4.modifiers = 1040
        *FloatMIN =1.4E-45
        *FloatMAX =3.4028235E38
        FloatMIN (the int bits) =1
        FloatMAX (the int bits)=2139095039
        java.lang.IllegalArgumentException:too many dimensions
            atjava.lang.reflect.Array.multiNewArray(Native Method)
            atjava.lang.reflect.Array.newInstance(Unknown Source)
            atTest.testDeepArrayConstruction(Unknown Source)
            atTest.main(Unknown Source)
            atsun.misc.CVM.runMain(Unknown Source)
        Constructed an object of type
        [[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[LTest;
        finally!
        Requesting GC with a latencyrequest of 2 seconds
        (Turning GC tracing on)
        Sleeping 5 seconds, and waitingfor GC's
        Woke up! Cancelling latencyrequest
        .............
        *CONGRATULATIONS: test Testcompleted with 411 tests passed and 0 failures
        *Output lines starting with a *should be checked for correctness
        *They can be compared tosrc/share/javavm/test/TestExpectedResult
        *CONGRATULATIONS: test Testcompleted with 411 tests passed and 0 failures
        到这里就说明移植成功了。 附注 出现问题： 把三个文件放到开发板运行时出现 illegal instruction。
解决：
重新安装交叉编译器arm-linux-gcc-4.3.2。

参考：http://wenku.baidu.com/link?url=ls84-soKRfZwp0CtlTkv0MDb7-Zgq_gvQd3rd8Gl1V-5jOwicLQBWq53HHmJgNDGm4mcHwX9sdkMMA2q-bYM76Z1PTmV5K7on7txi_paesi