From 112169798d2b757940a7404a69601240ffcb76c4 Mon Sep 17 00:00:00 2001
From: Matt Knoop <matt@owllabs.com>
Date: Wed, 12 Nov 2025 18:37:10 -0700
Subject: [PATCH] build the kernel. create a bootable efi image.

---
 build_kernel.sh  | 31 ++++++++++++++++++++++
 container_cmd.sh | 15 +++++++++++
 containerfile    | 16 +++++-------
 create_image.sh  | 68 ++++++++++++++++++++++++++++++++++++++++++++++++
 grub.cfg         | 17 ++++++++++++
 init.sh          |  8 ++++++
 6 files changed, 146 insertions(+), 9 deletions(-)
 create mode 100755 build_kernel.sh
 create mode 100644 container_cmd.sh
 create mode 100755 create_image.sh
 create mode 100644 grub.cfg
 create mode 100644 init.sh

diff --git a/build_kernel.sh b/build_kernel.sh
new file mode 100755
index 0000000..7c1d38f
--- /dev/null
+++ b/build_kernel.sh
@@ -0,0 +1,31 @@
+#!/bin/bash
+set -e
+cd "$(dirname "$0")"
+dir=$(dirname "$0")
+echo $dir
+#mkdir -p /tmp/linux
+[[ -d ./linux ]] || git clone --depth 1 https://github.com/torvalds/linux.git ./linux
+cat ./containerfile | /usr/bin/podman build --volume /lib/modules:/lib/modules:z -f - -t kernelbuild:latest .
+#rsync -av ./linux /mnt/tmpfs
+nice -n 20 /usr/bin/podman run -it --volume /lib/modules:/lib/modules:z --volume ./linux:/linux kernelbuild:latest
+cd $dir
+rm -rf initram/
+mkdir -p initram
+mkdir -p initram/{bin,dev,etc,lib,proc,sbin,sys,tmp,usr}
+mkdir -p initram/usr/{bin,sbin}
+mkdir -p initram/etc/{bin,sbin}
+mkdir -p initram/lib/modules/
+cp busybox ./initram/bin/
+#cp ./linux/drivers/block/nbd.ko initram/lib/modules/
+#cp ./linux/modules.builtin initram/lib/modules/
+#cp ./linux/modules.order initram/lib/modules/
+
+chmod +x $dir/initram/bin/busybox
+$dir/initram/bin/busybox --install -s "$dir/initram/bin/"
+cp $dir/init.sh $dir/initram/init
+cp $dir/linux/arch/x86_64/boot/bzImage $dir/bzImage.efi
+chmod +x $dir/initram/init
+cd $dir/initram/
+find .
+find . -print0 | cpio --null -ov --format=newc | gzip -9 > $dir/initramfs.cpio.gz
+
diff --git a/container_cmd.sh b/container_cmd.sh
new file mode 100644
index 0000000..1ae0403
--- /dev/null
+++ b/container_cmd.sh
@@ -0,0 +1,15 @@
+set -e
+cores=$(nproc)
+echo "${cores}"
+/usr/bin/make clean
+/usr/bin/make defconfig
+#cat /boot/config-$(uname -r) > ./linux/.config
+sed -i 's/CONFIG_SYSTEM_TRUSTED_KEYS="\.\*"/CONFIG_SYSTEM_TRUSTED_KEYS=""/' ./.config
+sed -i 's/CONFIG_SYSTEM_REVOCATION_KEYS="\.\*"/CONFIG_SYSTEM_REVOCATION_KEYS=""/' ./.config
+sed -i 's/CONFIG_EFI_STUB="\.\*"/CONFIG_EFI_STUB="n"/' ./.config
+echo "CONFIG_FB_EFI=y" >> ./.config
+echo "CONFIG_EFI=y" >> ./.config
+echo "CONFIG_SYSFB=y" >> ./.config
+echo "CONFIG_FB=y" >> ./.config
+echo "CONFIG_FRAMEBUFFER_CONSOLE=y" >> ./.config
+/usr/bin/make -j ${cores}
diff --git a/containerfile b/containerfile
index a2fe7ea..019332c 100644
--- a/containerfile
+++ b/containerfile
@@ -1,10 +1,8 @@
-from ubuntu
-run apt update
-run apt upgrade
-run apt install -y bison flex gcc make libncurses-dev git
-run apt install -y bc build-essential git libncurses5-dev lzop perl libssl-dev bison flex kmod device-tree-compiler 
-run apt install -y dwarves libelf-dev libdwarf-dev libdw-dev python3 gawk zstd
+from ubuntu:latest
+run apt-get update
+run apt-get upgrade -y
+run apt-get install -y bison flex gcc make libncurses-dev git bc build-essential git libncurses5-dev lzop perl libssl-dev bison flex kmod device-tree-compiler dwarves libelf-dev libdwarf-dev libdw-dev python3 gawk zstd
 workdir /linux
-add ./kernelb.sh /
-run chmod +x /kernelb.sh
-cmd ["/usr/bin/bash","-c","/kernelb.sh"]
\ No newline at end of file
+add ./container_cmd.sh /
+run chmod +x /container_cmd.sh
+cmd ["/usr/bin/bash","-c","/container_cmd.sh"]
diff --git a/create_image.sh b/create_image.sh
new file mode 100755
index 0000000..b5e26b5
--- /dev/null
+++ b/create_image.sh
@@ -0,0 +1,68 @@
+#!/bin/bash
+set -e
+cd "$(dirname "$0")"
+dir=$(dirname "$0")
+echo "${dir}"
+if mountpoint -q "$dir/mnt/efi"; then
+  umount "$dir/mnt/efi"
+fi
+if mountpoint -q "$dir/mnt/sys"; then
+  umount "$dir/mnt/sys"
+fi
+disk="boot_image.img"
+mnt="/mnt"
+efi_part="1"
+root_part="2"
+dd if=/dev/zero of=boot_image.img count=1024 bs=1M
+parted -s "$disk" mklabel gpt 
+parted -s --align=optimal "$disk" mkpart ESP fat32 1MiB 50Mib
+parted -s "$disk" set "$efi_part" esp on
+parted -s --align=optimal "$disk" mkpart ext2 100MiB 100%
+parted -s "$disk" set "$root_part" boot on
+parted -s "$disk" print
+kpartx -d "$disk"
+kpartx -avs "$disk"
+loop="$(kpartx -l boot_image.img | grep -ow 'loop[0-9]*' | head -n 1)"
+disk_efi="${loop}p1"
+disk_sys="${loop}p2"
+echo "${loop}"
+echo "${disk_efi}"
+echo "${disk_sys}"
+mkfs.fat -F32 -n EFI /dev/mapper/${disk_efi}
+mkfs.ext2 -L ROOT /dev/mapper/${disk_sys}
+rm -rf $dir/mnt/
+mkdir -p $dir/mnt/
+mkdir -p $dir/mnt/{efi,sys,grub}
+mount -t vfat /dev/mapper/${disk_efi} $dir/mnt/efi
+mount -t ext4 /dev/mapper/${disk_sys} $dir/mnt/sys
+
+#--grub-mkdevicemap=$dir/mnt/device.map
+#echo "(hd0) /dev/${disk_grub}" > $dir/mnt/device.map
+#--efi-directory=$dir/mnt/efi --boot-directory=$dir/mnt/grub --root-directory=$dir/mnt/sys  
+grub-install --target=x86_64-efi --recheck --no-floppy --efi-directory=$dir/mnt/efi --root-directory=$dir/mnt/sys --bootloader-id=patronage /dev/$loop 
+#umount $dir/mnt/image
+#lsblk -f
+mkdir -p $dir/mnt/efi/boot/
+cp $dir/initramfs.cpio.gz $dir/mnt/efi/
+mkdir -p $dir/mnt/efi/EFI/patronage/
+cp $dir/linux/arch/x86_64/boot/bzImage $dir/mnt/efi/EFI/patronage/bzImage
+cp $dir/initramfs.cpio.gz $dir/mnt/efi/EFI/patronage/
+#cp $dir/linux/arch/x86/boot/compressed/vmlinux $dir/mnt/efi/
+#cp $dir/linux/arch/x86/boot/vmlinux.bin $dir/mnt/efi/
+#cp $dir/initramfs.cpio.gz $dir/mnt/sys/
+#cp $dir/linux/arch/x86_64/boot/bzImage $dir/mnt/sys/
+#cp $dir/linux/arch/x86/boot/compressed/vmlinux $dir/mnt/sys/
+#cp $dir/linux/arch/x86/boot/vmlinux.bin $dir/mnt/sys/
+
+cp $dir/grub.cfg $dir/mnt/efi/EFI/patronage/
+#cp $dir/grub.cfg $dir/mnt/sys/boot/grub/
+cp $dir/grub.cfg $dir/mnt/efi/EFI/BOOT/
+sync
+#exit
+if mountpoint -q "$dir/mnt/efi"; then
+  umount "$dir/mnt/efi"
+fi
+if mountpoint -q "$dir/mnt/sys"; then
+  umount "$dir/mnt/sys"
+fi
+kpartx -d boot_image.img
diff --git a/grub.cfg b/grub.cfg
new file mode 100644
index 0000000..749ab5f
--- /dev/null
+++ b/grub.cfg
@@ -0,0 +1,17 @@
+set	timeout=1
+set	default=0
+insmod	fat
+insmod	part_gpt
+insmod	gzio
+
+set	root='(hd0,gpt1)'
+menuentry "PatronageOS" {
+    ls	(hd0,gpt1)/EFI/patronage/
+    linux	/EFI/patronage/bzImage quiet splash debug=yes ramdisk_size=500000,1 boot=/init
+    echo	'loaded kernel...'
+    initrd	/EFI/patronage/initramfs.cpio.gz
+    echo	'loaded initial ramdisk...'
+    set debug=all
+    boot
+    echo	'done.'
+}
diff --git a/init.sh b/init.sh
new file mode 100644
index 0000000..85a1eb8
--- /dev/null
+++ b/init.sh
@@ -0,0 +1,8 @@
+#!/bin/busybox sh
+/bin/busybox mount -t devtmpfs devtmpfs /dev
+/bin/busybox mount -t proc none /proc
+/bin/busybox mount -t sysfs none /sys
+#/bin/busybox ln -s "/lib/modules/" "/lib/modules/$(uname -r)"
+#depmod -a
+#/bin/busybox modprobe nbd max_part=2
+exec /bin/busybox sh