From 77e8c07dc0307cfca9f0987cd982419ed5b7a2a6 Mon Sep 17 00:00:00 2001
From: RouxAntoine <antoinroux@hotmail.fr>
Date: Sat, 6 Jan 2024 19:22:16 +0100
Subject: [PATCH] I know what I am doing. Trust me.

Signed-off-by: RouxAntoine <antoinroux@hotmail.fr>
---
 rootfs-kernel/Makefile  |  6 +++---
 rootfs-kernel/kernel.sh | 18 ++++++++++++------
 2 files changed, 15 insertions(+), 9 deletions(-)

diff --git a/rootfs-kernel/Makefile b/rootfs-kernel/Makefile
index ee731bb..65ce6f5 100644
--- a/rootfs-kernel/Makefile
+++ b/rootfs-kernel/Makefile
@@ -13,15 +13,15 @@ use-ubuntu: ../out/ubuntu-22.04.ext4 ../out/ubuntu-22.04.id_rsa
 use-kernel: ../out/vmlinux-5.10.204
 	ln -fs $< ../out/vmlinux
 
-use-kernel-custom: ../out/vmvmlinux-custom
+use-kernel-custom: ../out/vmlinux-5.11
 	ln -fs $< ../out/vmlinux
 
 ../out/vmlinux-5.10.204:
 	wget -O $@ https://s3.amazonaws.com/spec.ccfc.min/firecracker-ci/v1.7/$(ARCH)/vmlinux-5.10.204
 
 CONFIG_FILE=$(wildcard ./kernel-config/*.config)
-../out/vmvmlinux-custom: ./kernel.sh $(CONFIG_FILE)
-	bash ./kernel.sh
+../out/vmlinux-5.11: ./kernel.sh $(CONFIG_FILE)
+	bash ./kernel.sh 5.11
 
 ../out/arch-rootfs.ext4: ./arch-rootfs.sh
 	bash ./arch-rootfs.sh
diff --git a/rootfs-kernel/kernel.sh b/rootfs-kernel/kernel.sh
index bc6ea87..2e30f5d 100755
--- a/rootfs-kernel/kernel.sh
+++ b/rootfs-kernel/kernel.sh
@@ -4,18 +4,20 @@
 
 set -ex
 
-KERNEL_VERSION=v5.11
+KERNEL_VERSION=$1
 WD=../out
+NPROC=4
 
 ## Install build tools
 # pacman -Syu base-devel bc pahole --ignore linux-firmware
+# disabling CONFIG_DEBUG_INFO_BTF so no pahole required
 
 sudo rm -rf "$WD"/linux
 ## Get kernel source
-git clone --depth 1 --branch $KERNEL_VERSION https://github.com/torvalds/linux.git "$WD"/linux
+git clone --depth 1 --branch v$KERNEL_VERSION https://github.com/torvalds/linux.git "$WD"/linux
 
 ## Get Archlinux kernel config
-curl -o "$WD"/linux/.config https://gitlab.archlinux.org/archlinux/packaging/packages/linux/-/raw/2db49d4fbcda88d76a4c236ccb5a7986715d70ba/config
+curl -o "$WD"/linux/.config https://gitlab.archlinux.org/archlinux/packaging/packages/linux/-/raw/5.11.16.arch1-1/config?ref_type=tags
 
 CONFIG_PATH="$WD"/linux/.config
 
@@ -34,6 +36,7 @@ sed 's/\(.*\)VIDEO\(.*\)=y/\1VIDEO\2=n/g' -i "$CONFIG_PATH"
 # sed 's/\(.*\)PCI\(.*\)=y/\1PCI\2=n/g' -i "$CONFIG_PATH"
 sed 's/\(.*\)WLAN\(.*\)=y/\1WLAN\2=n/g' -i "$CONFIG_PATH"
 sed 's/\(.*\)DRM\(.*\)=y/\1DRM\2=n/g' -i "$CONFIG_PATH"
+sed 's/\(.*\)BTF\(.*\)=y/\1BTF\2=n/g' -i "$CONFIG_PATH"
 
 cat kernel-config/virtio.config >> "$CONFIG_PATH"
 cat kernel-config/fs.config >> "$CONFIG_PATH"
@@ -42,6 +45,9 @@ cat kernel-config/net.config >> "$CONFIG_PATH"
 ## Add KVM guest support
 make -C "$WD"/linux/ kvm_guest.config
 
-#make -j$(nproc)
-#
-#./scripts/extract-vmlinux ./arch/x86_64/boot/bzImage > "$WD"/vmlinux-$KERNEL_VERSION.bin
+make -j$NPROC EXTRA_CFLAGS=-Wno-error=use-after-free
+#make -j$NPROC WERROR=0
+
+cp ./vmlinux "$WD"/vmlinux-$KERNEL_VERSION
+
+sudo rm -rf "$WD"/linux