XNU build script

script.sh

download() {
    gh repo clone apple-oss-distributions/distribution-macOS
    cd distribution-macOS
    # checkout to macos-123 since Xcode 13.4 is bundled with macOS 12.3 SDK
    git checkout tags/macos-123

    export TOOLCHAIN_PATH=$(cd `xcrun -sdk macosx -show-sdk-platform-path`/../../Toolchains/XcodeDefault.xctoolchain && pwd)
    export SDKPATH=$(xcrun -sdk macosx -show-sdk-path)
    export XCODEPATH=$(xcrun -sdk macosx -show-sdk-path | sed 's,\(.*/Xcode[^/]*\.app\)/.*,\1,')

    rm -rf dtrace
    git submodule update --init dtrace
    cd dtrace
    xcodebuild install -sdk macosx -target ctfconvert \
                -target ctfdump -target ctfmerge \
                ARCHS='x86_64 arm64' VALID_ARCHS='x86_64 arm64' DSTROOT="$PWD/dst"
    sudo ditto "$PWD/dst/$TOOLCHAIN_PATH" "$TOOLCHAIN_PATH"
    cd ..

    rm -rf AvailabilityVersions
    git submodule update --init AvailabilityVersions
    cd AvailabilityVersions
    make install
    sudo ditto "$PWD/dst/usr/local/libexec" "$SDKPATH/usr/local/libexec"
    cd ..

    rm -rf xnu
    git submodule update --init xnu
    cd xnu
    make SDKROOT=macosx ARCH_CONFIGS="X86_64 ARM64" installhdrs
    sudo ditto "$PWD/BUILD/dst" "$SDKPATH"
    cd ..

    rm -rf libdispatch
    git submodule update --init libdispatch
    cd libdispatch
    xcodebuild install -sdk macosx ARCHS='x86_64 arm64e' \
      VALID_ARCHS='x86_64 arm64e' -target libfirehose_kernel \
      PRODUCT_NAME=firehose_kernel DSTROOT=$PWD/dst
    sudo ditto "$PWD/dst/usr/local" "$SDKPATH/usr/local"
    cd ..
}

build() {
    # makedefs/MakeInc.def  USE_WERROR := 0
    # iokit/Kernel/IOBufferMemoryDescriptor.cpp Null → false
    cd xnu
    # Build for arm64
    export KDK=/Library/Developer/KDKs/KDK_12.3_21E230.kdk
    make SDKROOT=macosx KDKROOT=$KDK TARGET_CONFIGS="RELEASE ARM64 T8101"

    # Build for x86_64
    # make SDKROOT=macosx ARCH_CONFIGS=x86_64 KERNEL_CONFIGS=RELEASE
    cd ..
}

install() {
  cd xnu
  kmutil create -a arm64e -z -V development -n boot \
    -B BUILD/OpenSource.kc \
    -k BUILD/obj/kernel.development.t8101 \
    -r /System/Library/Extensions \
    -r /System/Library/DriverExtensions \
    -x \
    $(kmutil inspect -V release --no-header | grep -v "SEPHiber" | awk '{print " -b "$1; }')

  # kmutil create -a arm64e -z -V release -n boot \
  #   -B BUILD/OpenSource.kc \
  #   -k BUILD/obj/kernel.release.t8101 \
  #   -r /System/Library/Extensions \
  #   -r /System/Library/DriverExtensions \
  #   -x \
  #   $(kmutil inspect -V release --no-header | grep -v "SEPHiber" | awk '{print " -b "$1; }')

  cd ..
}

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