From 3e8ff92446ae772c202b581e2250e2eb2affe5cb Mon Sep 17 00:00:00 2001
From: Johannes Stoelp <johannes.stoelp@gmail.com>
Date: Thu, 23 Nov 2023 00:08:44 +0100
Subject: kernel-dbg: fix ramfs vs ramdisk and use devtmpfs and update
 busybox/kernel version

---
 content/2019-10-27-kernel-debugging-qemu/build_initrd.sh | 12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)

(limited to 'content/2019-10-27-kernel-debugging-qemu/build_initrd.sh')

diff --git a/content/2019-10-27-kernel-debugging-qemu/build_initrd.sh b/content/2019-10-27-kernel-debugging-qemu/build_initrd.sh
index fd82990..f5bece4 100755
--- a/content/2019-10-27-kernel-debugging-qemu/build_initrd.sh
+++ b/content/2019-10-27-kernel-debugging-qemu/build_initrd.sh
@@ -6,7 +6,7 @@ fi
 
 set -e
 
-BUSYBOX=busybox-1.33.1
+BUSYBOX=busybox-1.36.1
 INITRD=$PWD/initramfs.cpio.gz
 
 ## Build busybox
@@ -20,7 +20,7 @@ echo "[+] configure & build $BUSYBOX ..."
 cd $BUSYBOX
 make defconfig
 sed -i 's/# CONFIG_STATIC .*/CONFIG_STATIC=y/' .config
-make -j4 busybox
+make -j$(nproc --ignore=2) busybox
 make install
 
 ## Create initrd
@@ -38,17 +38,13 @@ cat <<EOF > init
 
 mount -t proc none /proc
 mount -t sysfs none /sys
+mount -t devtmpfs none /dev
 
 exec setsid cttyhack sh
 EOF
 chmod +x init
 
-# 3. create device nodes
-$SUDO mknod dev/tty c 5 0
-$SUDO mknod dev/tty0 c 4 0
-$SUDO mknod dev/ttyS0 c 4 64
-
-# 4. created compressed initrd
+# 3. created compressed initrd
 find . -print0                      \
     | cpio --null -ov --format=newc \
     | gzip -9 > $INITRD
-- 
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