README

# openjdk for arm under development

1. Login to qemu arm linux

sudo chroot temp /bin/su - hchan

sudo chroot temp


2. Build linux-sgx(sdk):

Remove linux-sgx/sdk/cpprt/linux/libunwind/Makefile

最後根據 docker file


3. Build qemu

http://wiki.t-firefly.com/en/ROC-RK3399-PC/linux_build_ubuntu_rootfs.html

apt install sudo

visudo

加下面一行到最底
hchan ALL=(ALL) NOPASSWD: ALL


Then 

http://logan.tw/posts/2018/02/18/build-qemu-user-static-from-source-code/

Finally

https://www.qemu.org/download/#source

sudo cp ~/qemu-user-static/bin/qemu-aarch64-static temp/usr/bin/

最後根據 docker file

under ~/

git clone https://github.com/jianyu-m/openjdk-arch-sgx/ && cd openjdk-arch-sgx && git checkout origin/hansen_test && cp -R ~/linux-sgx/build/linux/ hotspot/lib && mkdir hotspot/build/ && cd hotspot/build/ && sudo cmake ../ && sudo make -j && sudo make install && sudo make install && sudo cp libenclave.so /usr/lib/ && cd ~/openjdk-arch-sgx/ && ./configure && sudo make images

# Use javac and java to run environment test

javac command under openjdk-arch-sgx/ev_test:

 ~/openjdk-arch-sgx/build/linux-aarch64-normal-server-release/images/j2sdk-image/bin/javac -d . -cp ~/openjdk-arch-sgx/build/linux-aarch64-normal-server-release/images/j2sdk-image/jre/lib/rt.jar TestSuit.java

java command under openjdk-arch-sgx/ev_test:

~/openjdk-arch-sgx/build/linux-aarch64-normal-server-release/images/j2sdk-image/bin/java -ea TestSuit


For loop program needed bytecodes

       0: aload_0
       1: invokespecial #1                  // Method java/lang/Object."<init>":()V
       4: return

       0: iconst_0
       1: istore_1
       2: getstatic     #2                  // Field java/lang/System.out:Ljava/io/PrintStream;
       5: iload_1
       6: invokestatic  #3                  // Method addTen:(I)I
       9: invokevirtual #4                  // Method java/io/PrintStream.println:(I)V
      12: return

       0: iconst_0
       1: istore_1
       2: iload_1
       3: bipush        10
       5: if_icmpge     18
       8: iload_0
       9: iconst_1
      10: iadd
      11: istore_0
      12: iinc          1, 1
      15: goto          2
      18: iload_0
      19: ireturn






README:
  This file should be located at the top of the OpenJDK Mercurial root
  repository. A full OpenJDK repository set (forest) should also include
  the following 6 nested repositories:
    "jdk", "hotspot", "langtools", "corba", "jaxws"  and "jaxp".

  The root repository can be obtained with something like:
    hg clone http://hg.openjdk.java.net/jdk8/jdk8 openjdk8
  
  You can run the get_source.sh script located in the root repository to get
  the other needed repositories:
    cd openjdk8 && sh ./get_source.sh

  People unfamiliar with Mercurial should read the first few chapters of
  the Mercurial book: http://hgbook.red-bean.com/read/

  See http://openjdk.java.net/ for more information about OpenJDK.

Simple Build Instructions:
  
  0. Get the necessary system software/packages installed on your system, see
     http://hg.openjdk.java.net/jdk8/jdk8/raw-file/tip/README-builds.html

  1. If you don't have a jdk7u7 or newer jdk, download and install it from
     http://java.sun.com/javase/downloads/index.jsp
     Add the /bin directory of this installation to your PATH environment
     variable.

  2. Configure the build:
       bash ./configure
  
  3. Build the OpenJDK:
       make all
     The resulting JDK image should be found in build/*/images/j2sdk-image

where make is GNU make 3.81 or newer, /usr/bin/make on Linux usually
is 3.81 or newer. Note that on Solaris, GNU make is called "gmake".

Complete details are available in the file:
     http://hg.openjdk.java.net/jdk8/jdk8/raw-file/tip/README-builds.html