qemu

qemu/setup_guest.sh

@@ -0,0 +1,55 @@
+#!/bin/sh
+set -eux
+
+mkdir -p images
+mkdir -p poc
+
+cp /boot/vmlinuz-linux images/vmlinuz-linux
+chmod 0755 images/vmlinuz-linux
+
+curl -L --fail --show-error \
+  -o images/alpine-latest-releases.yaml \
+  https://dl-cdn.alpinelinux.org/alpine/v3.23/releases/x86_64/latest-releases.yaml
+
+curl -L --fail --show-error \
+  -o images/alpine-minirootfs-3.23.4-x86_64.tar.gz \
+  https://dl-cdn.alpinelinux.org/alpine/v3.23/releases/x86_64/alpine-minirootfs-3.23.4-x86_64.tar.gz
+
+rm -rf alpine_root_fs.tmp
+mkdir -p alpine_root_fs.tmp
+tar -xzf images/alpine-minirootfs-3.23.4-x86_64.tar.gz -C alpine_root_fs.tmp
+
+printf '%s\n' \
+  https://dl-cdn.alpinelinux.org/alpine/v3.23/main \
+  https://dl-cdn.alpinelinux.org/alpine/v3.23/community \
+  > alpine_root_fs.tmp/etc/apk/repositories
+
+rm -f alpine_root_fs.tmp/sbin/init
+cat > alpine_root_fs.tmp/sbin/init <<'EOF'
+#!/bin/sh
+
+PATH=/sbin:/bin:/usr/sbin:/usr/bin
+export PATH
+
+mount -t devtmpfs devtmpfs /dev 2>/dev/null || true
+mount -t proc proc /proc 2>/dev/null || true
+mount -t sysfs sysfs /sys 2>/dev/null || true
+
+exec /bin/sh </dev/console >/dev/console 2>&1
+EOF
+chmod 0755 alpine_root_fs.tmp/sbin/init
+
+gcc -static -O2 -Wall -Wextra -o exp/exp exp/exp.c
+
+cp exp/exp alpine_root_fs.tmp/exp
+chmod 0755 alpine_root_fs.tmp/exp
+
+rm -f images/alpine.tmp
+truncate -s 128M images/alpine.tmp
+mkfs.ext4 -q -F -d alpine_root_fs.tmp images/alpine.tmp
+
+rm -rf alpine_root_fs
+mv alpine_root_fs.tmp alpine_root_fs
+mv images/alpine.tmp images/alpine
+
+echo done