diff options
Diffstat (limited to 'content/20191027-kernel-debugging-qemu')
| -rw-r--r-- | content/20191027-kernel-debugging-qemu/Dockerfile | 32 | ||||
| -rw-r--r-- | content/20191027-kernel-debugging-qemu/Makefile | 12 | ||||
| -rwxr-xr-x | content/20191027-kernel-debugging-qemu/build_initrd.sh | 54 | ||||
| -rwxr-xr-x | content/20191027-kernel-debugging-qemu/build_kernel.sh | 38 | ||||
| -rwxr-xr-x | content/20191027-kernel-debugging-qemu/run.sh | 24 |
5 files changed, 0 insertions, 160 deletions
diff --git a/content/20191027-kernel-debugging-qemu/Dockerfile b/content/20191027-kernel-debugging-qemu/Dockerfile deleted file mode 100644 index 42e1f05..0000000 --- a/content/20191027-kernel-debugging-qemu/Dockerfile +++ /dev/null @@ -1,32 +0,0 @@ -FROM ubuntu:20.04 -MAINTAINER Johannes Stoelp <johannes.stoelp@gmail.edu> - -RUN apt update \ - && DEBIAN_FRONTEND=noninteractive \ - apt install \ - --yes \ - --no-install-recommends \ - # Download & unpack. - wget \ - ca-certificates \ - xz-utils \ - # Build tools & deps (kernel). - make \ - bc \ - gcc g++ \ - flex bison \ - libelf-dev \ - # Build tools & deps (initrd). - cpio \ - # Run & debug. - qemu-system-x86 \ - gdb \ - telnet \ - # Convenience. - ripgrep \ - fd-find \ - neovim \ - && rm -rf /var/lib/apt/lists/* \ - && apt-get clean - -WORKDIR /develop diff --git a/content/20191027-kernel-debugging-qemu/Makefile b/content/20191027-kernel-debugging-qemu/Makefile deleted file mode 100644 index 11e7c7b..0000000 --- a/content/20191027-kernel-debugging-qemu/Makefile +++ /dev/null @@ -1,12 +0,0 @@ -build: - scripts/build_kernel.sh - scripts/build_initrd.sh - -clean: - $(RM) -r linux-* - $(RM) -r busybox-* - $(RM) initramfs.cpio.gz - -docker: - DOCKER_BUILDKIT=1 docker build -t kernel-dev . - docker run -it --rm -v $(PWD):/develop/scripts -v $(PWD)/Makefile:/develop/Makefile kernel-dev diff --git a/content/20191027-kernel-debugging-qemu/build_initrd.sh b/content/20191027-kernel-debugging-qemu/build_initrd.sh deleted file mode 100755 index fd82990..0000000 --- a/content/20191027-kernel-debugging-qemu/build_initrd.sh +++ /dev/null @@ -1,54 +0,0 @@ -#!/bin/bash - -if test $(id -u) -ne 0; then - SUDO=sudo -fi - -set -e - -BUSYBOX=busybox-1.33.1 -INITRD=$PWD/initramfs.cpio.gz - -## Build busybox - -echo "[+] configure & build $BUSYBOX ..." -[[ ! -d $BUSYBOX ]] && { - wget https://busybox.net/downloads/$BUSYBOX.tar.bz2 - bunzip2 $BUSYBOX.tar.bz2 && tar xf $BUSYBOX.tar -} - -cd $BUSYBOX -make defconfig -sed -i 's/# CONFIG_STATIC .*/CONFIG_STATIC=y/' .config -make -j4 busybox -make install - -## Create initrd - -echo "[+] create initrd $INITRD ..." - -cd _install - -# 1. create initrd folder structure -mkdir -p bin sbin etc proc sys usr/bin usr/sbin dev - -# 2. create init process -cat <<EOF > init -#!/bin/sh - -mount -t proc none /proc -mount -t sysfs none /sys - -exec setsid cttyhack sh -EOF -chmod +x init - -# 3. create device nodes -$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 -find . -print0 \ - | cpio --null -ov --format=newc \ - | gzip -9 > $INITRD diff --git a/content/20191027-kernel-debugging-qemu/build_kernel.sh b/content/20191027-kernel-debugging-qemu/build_kernel.sh deleted file mode 100755 index 7ae3014..0000000 --- a/content/20191027-kernel-debugging-qemu/build_kernel.sh +++ /dev/null @@ -1,38 +0,0 @@ -#!/bin/bash - -set -e - -LINUX=linux-5.13.2 -wget https://cdn.kernel.org/pub/linux/kernel/v5.x/$LINUX.tar.xz -unxz $LINUX.tar.xz && tar xf $LINUX.tar - -cd $LINUX - -cat <<EOF > kernel_fragment.config -# 64bit kernel -CONFIG_64BIT=y -# enable support for compressed initrd (gzip) -CONFIG_BLK_DEV_INITRD=y -CONFIG_RD_GZIP=y -# support for ELF and #! binary format -CONFIG_BINFMT_ELF=y -CONFIG_BINFMT_SCRIPT=y -# /dev -CONFIG_DEVTMPFS=y -CONFIG_DEVTMPFS_MOUNT=y -# tty & console -CONFIG_TTY=y -CONFIG_SERIAL_8250=y -CONFIG_SERIAL_8250_CONSOLE=y -# pseudo fs -CONFIG_PROC_FS=y -CONFIG_SYSFS=y -# debugging -CONFIG_DEBUG_INFO=y -CONFIG_PRINTK=y -CONFIG_EARLY_PRINTK=y -EOF - -make tinyconfig -./scripts/kconfig/merge_config.sh -n ./kernel_fragment.config -make -j4 diff --git a/content/20191027-kernel-debugging-qemu/run.sh b/content/20191027-kernel-debugging-qemu/run.sh deleted file mode 100755 index b0a84ae..0000000 --- a/content/20191027-kernel-debugging-qemu/run.sh +++ /dev/null @@ -1,24 +0,0 @@ -#!/bin/bash - -VER=5.13.2 - -# Launch the emulator with our kernel. -qemu-system-x86_64 \ - -kernel ./linux-$VER/arch/x86/boot/bzImage \ - -nographic \ - -append "earlyprintk=ttyS0 console=ttyS0 nokaslr init=/init debug" \ - -initrd ./initramfs.cpio.gz \ - -serial telnet:localhost:12345,server,nowait \ - -monitor none \ - -gdb tcp::1234 \ - -S & - -# Kill qemu when we exit. -QEMU_PID=$! -trap "kill $QEMU_PID" EXIT - -# Give qemu some time to come up. -sleep 0.5 - -# Attach debugger to qemu and load the kernel symbols. -gdb -ex 'target remote :1234' ./linux-$VER/vmlinux |