setup.sh

#!/bin/bash

usage()
{
    echo "Usage   : $0 [ OPTIONS ]"
    echo "Options :  "
    echo "     -l : Setup Localy "
    echo "     -v x86/arm : Setup corresponding virtual images"
}

if [ $# -eq 0 ]
then
    usage
    exit
fi

while getopts ":lv:" opt ;do
    case "${opt}" in
        l)
            echo -e "\n---- Installing Kernel Headers -----\n\n"
            sudo apt update && sudo apt install -y linux-headers-$(uname -r)
            ;;
        v)
            if [ ${OPTARG} != "x86" -a ${OPTARG} != "arm" ]; then
                echo -e "Invalid Architecture Specified \n\n"
                usage
                exit
            fi

            # Install qemu for running the kernel Images
            echo -e "\n---- Installing QEMU -----\n\n"
            sudo apt update && sudo apt-get install -y qemu qemu-user qemu-user-static

            echo -e "\n---- Installing Kernel Sources -----\n\n"
            mkdir kernel_source
            cd kernel_source
            wget -c  https://cdn.kernel.org/pub/linux/kernel/v4.x/linux-4.18.16.tar.xz
            tar -xvf linux-4.18.16.tar.xz
            cd ../
            
            if [ ${OPTARG} = "arm" ] ;then
                # GDB multiarch for Debugging
                sudo apt-get install -y gdb-multiarch
                # Cross Compiler for arm
                sudo apt-get install -y gcc-arm-linux-gnueabihf libc6-dev-armhf-cross libelf-dev gcc-aarch64-linux-gnu

                echo -e "\n---- Unpacking Kernel Image ----\n\n"
                tar -xvzf ./images/arm64/arm64-Image.tar.gz -C ./images/arm64/

                echo -e "\n---- Preparing Kernel for Module Compilation ----\n\n"
                cd ./kernel_source/linux-4.18.16/
                ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- make defconfig
                ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- make modules_prepare
                cd ../../
            fi

            if [ ${OPTARG} = "x86" ]; then
                sudo apt-get install -y libssl-dev
                echo -e "Downloading Virtual image\n"
                cd ./images
                wget -c http://www.akulpillai.com/how2kernel/x86_64.tar.gz
                tar xvf x86_64.tar.gz
                cd ../
                
                echo "Building for x86"
                echo -e "\n---- Preparing Kernel for Module Compilation ----\n\n"
		sudo apt install bison
		sudo apt install flex
		sudo apt install libelf-dev
                cd ./kernel_source/linux-4.18.16/
                make x86_64_defconfig
                make modules_prepare
                cd ../../
                
            fi
            ;;
        *)
            echo "Invalid Option "
            usage
            ;;
    esac
done