debootstrap-ubuntu-qemu-arm.sh

Author: cirosantilli

README.md

@@ -290,6 +290,7 @@ Includes Linux concepts and utilities that work on Linux, not necessarily in the
     1.  [Docker](docker/)
     1.  [QEMU](qemu.md)
         1. [debootstrap-ubuntu-qemu.sh](debootstrap-ubuntu-qemu.sh)
+        1. [debootstrap-ubuntu-qemu-arm.sh](debootstrap-ubuntu-qemu-arm.sh)
         1. [debootstrap-debian-qemu.sh](debootstrap-debian-qemu.sh)
     1.  [Xen](xen.md)
     1.  [Vagrant](vagrang/)

debootstrap-debian-qemu.sh

@@ -76,13 +76,14 @@ if [ ! -f "$linux_img" ]; then
   cd -
 fi
 
+linux_img=/home/ciro/bak/git/linux-kernel-module-cheat/submodules/linux/debian/build/./build-generic/arch/x86_64/boot/bzImage
 qemu-system-x86_64 \
   -append 'console=ttyS0 root=/dev/sda' \
+  -device rtl8139,netdev=net0 \
   -drive "file=${root_filesystem},format=qcow2" \
   -enable-kvm \
-  -serial mon:stdio \
-  -m 2G \
   -kernel "$linux_img" \
-  -device rtl8139,netdev=net0 \
+  -m 2G \
   -netdev user,id=net0 \
+  -serial mon:stdio \
 ;

debootstrap-ubuntu-qemu-arm.sh

@@ -0,0 +1,123 @@
+#!/usr/bin/env bash
+
+# https://askubuntu.com/questions/281763/is-there-any-prebuilt-qemu-ubuntu-image32bit-online/1081171#1081171
+
+set -eux
+
+debootstrap_dir=debootstrap
+root_filesystem=debootstrap.ext2.qcow2
+
+sudo apt-get install \
+  gcc-aarch64-linux-gnu \
+  debootstrap \
+  libguestfs-tools \
+  qemu-system-aarch64 \
+  qemu-user-static \
+;
+
+if [ ! -d "$debootstrap_dir" ]; then
+  sudo debootstrap \
+    --arch arm64 \
+    --foreign \
+    bionic \
+    "$debootstrap_dir" \
+    http://ports.ubuntu.com/ubuntu-ports \
+  ;
+  sudo mkdir -p "${debootstrap_dir}/usr/bin"
+  sudo cp "$(which qemu-aarch64-static)" "${debootstrap_dir}/usr/bin"
+  sudo chroot "$debootstrap_dir" /debootstrap/debootstrap --second-stage
+  sudo rm -f "$root_filesystem"
+fi
+
+linux_image="$(printf "${debootstrap_dir}/boot/vmlinuz-"*)"
+
+if [ ! -f "$root_filesystem" ]; then
+  # Set root password.
+  echo 'root:root' | sudo chroot "$debootstrap_dir" chpasswd
+
+  # Remount root filesystem as rw.
+  cat << EOF | sudo tee "${debootstrap_dir}/etc/fstab"
+/dev/sda / ext4 errors=remount-ro,acl 0 1
+EOF
+
+  # Automaticaly start networking.
+  # Otherwise network commands fail with:
+  #     Temporary failure in name resolution
+  # https://askubuntu.com/questions/1045278/ubuntu-server-18-04-temporary-failure-in-name-resolution/1080902#1080902
+  cat << EOF | sudo tee "${debootstrap_dir}/etc/systemd/system/dhclient.service"
+[Unit]
+Description=DHCP Client
+Documentation=man:dhclient(8)
+Wants=network.target
+Before=network.target
+
+[Service]
+Type=forking
+PIDFile=/var/run/dhclient.pid
+ExecStart=/sbin/dhclient -4 -q
+
+[Install]
+WantedBy=multi-user.target
+EOF
+  sudo ln -sf "${debootstrap_dir}/etc/systemd/system/dhclient.service" \
+    "${debootstrap_dir}/etc/systemd/system/multi-user.target.wants/dhclient.service"
+
+  # Why Ubuntu, why.
+  # https://bugs.launchpad.net/ubuntu/+source/linux/+bug/759725
+  sudo chmod +r "${linux_image}"
+
+  # Generate image file from debootstrap directory.
+  # Leave 1Gb extra empty space in the image.
+  sudo virt-make-fs \
+    --format qcow2 \
+    --size +1G \
+    --type ext2 \
+    "$debootstrap_dir" \
+    "$root_filesystem" \
+  ;
+  sudo chmod 666 "$root_filesystem"
+fi
+
+# Build the Linux kernel.
+linux_image="$(pwd)/linux/debian/build/build-generic/arch/arm64/boot/Image"
+if [ ! -f "$linux_image" ]; then
+  #git clone --branch Ubuntu-4.15.0-20.21 --depth 1 git://kernel.ubuntu.com/ubuntu/ubuntu-bionic.git linux
+  cd linux
+  cat << EOF | patch -p1
+diff --git a/debian.master/config/config.common.ubuntu b/debian.master/config/config.common.ubuntu
+index 5ff32cb997e9..8a190d3a0299 100644
+--- a/debian.master/config/config.common.ubuntu
++++ b/debian.master/config/config.common.ubuntu
+@@ -10153,7 +10153,7 @@ CONFIG_VIDEO_ZORAN_ZR36060=m
+ CONFIG_VIPERBOARD_ADC=m
+ CONFIG_VIRTIO=y
+ CONFIG_VIRTIO_BALLOON=y
+-CONFIG_VIRTIO_BLK=m
++CONFIG_VIRTIO_BLK=y
+ CONFIG_VIRTIO_BLK_SCSI=y
+ CONFIG_VIRTIO_CONSOLE=y
+ CONFIG_VIRTIO_INPUT=m
+EOF
+  export ARCH=arm64
+  export $(dpkg-architecture -aarm64)
+  export CROSS_COMPILE=aarch64-linux-gnu-
+  fakeroot debian/rules clean
+  debian/rules updateconfigs
+  fakeroot debian/rules DEB_BUILD_OPTIONS=parallel=`nproc` build-generic
+  cd -
+fi
+
+#linux_image=/home/ciro/bak/git/linux-kernel-module-cheat/out/linux/default/aarch64/arch/arm64/boot/Image
+#linux_image=/home/ciro/bak/git/linux-kernel-module-cheat/submodules/linux/debian/build/build-generic/arch/arm64/boot/Image
+qemu-system-aarch64 \
+  -append 'console=ttyAMA0 root=/dev/vda rootfstype=ext2' \
+  -device rtl8139,netdev=net0 \
+  -drive "file=${root_filesystem},format=qcow2" \
+  -kernel "${linux_image}" \
+  -m 2G \
+  -netdev user,id=net0 \
+  -serial mon:stdio \
+  -M virt,highmem=off \
+  -cpu cortex-a57 \
+  -nographic \
+;

debootstrap-ubuntu-qemu.sh

@@ -1,6 +1,7 @@
 #!/usr/bin/env bash
 
 # https://askubuntu.com/questions/281763/is-there-any-prebuilt-qemu-ubuntu-image32bit-online/1081171#1081171
+# https://askubuntu.com/questions/802701/kernel-build-cross-compile
 
 set -eux
 
@@ -16,7 +17,6 @@ sudo apt-get install \
 if [ ! -d "$debootstrap_dir" ]; then
   # Create debootstrap directory.
   # - linux-image-generic: downloads the kernel image we will use under /boot
-  # - network-manager: automatically starts the network at boot for us
   sudo debootstrap \
     --include linux-image-generic \
     bionic \
@@ -75,6 +75,7 @@ EOF
   sudo chmod 666 "$root_filesystem"
 fi
 
+linux_image=/home/ciro/bak/git/linux-kernel-module-cheat/submodules/linux/debian/build/./build-generic/arch/x86_64/boot/bzImage
 qemu-system-x86_64 \
   -append 'console=ttyS0 root=/dev/sda' \
   -drive "file=${root_filesystem},format=qcow2" \