316 lines
10 KiB
Bash
Executable file
316 lines
10 KiB
Bash
Executable file
#!/bin/bash
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set -e
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# Configuration
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KERNEL_VERSION="${KERNEL_VERSION:-6.6.10}"
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SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
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PROJECT_ROOT="$(dirname "$SCRIPT_DIR")"
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OUTPUT_DIR="$PROJECT_ROOT/output"
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INITRAMFS_NAME="initramfs-${KERNEL_VERSION}-s390x.img"
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MKINITCPIO_SOURCE="/home/josie/development/archlinux/mkinitcpio" # changeme :)
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# Colors
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RED='\033[0;31m'
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GREEN='\033[0;32m'
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YELLOW='\033[1;33m'
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NC='\033[0m'
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echo -e "${GREEN}=== Building initramfs with modified mkinitcpio ===${NC}"
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# Create build script that runs inside container
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cat > "$PROJECT_ROOT/build-final-initramfs.sh" << 'EOF'
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#!/bin/bash
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set -e
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KERNEL_VERSION="6.6.10"
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INITRAMFS_OUTPUT="/work/output/initramfs-${KERNEL_VERSION}-s390x.img"
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echo "Building and installing modified mkinitcpio..."
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# Copy the mkinitcpio source
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cp -r /work/mkinitcpio-source /tmp/mkinitcpio
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cd /tmp/mkinitcpio
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# Apply s390x patches
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echo "Applying s390x patches to mkinitcpio..."
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cat > install/base << 'PATCH_EOF'
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#!/usr/bin/env bash
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# SPDX-License-Identifier: GPL-2.0-only
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# Modified for s390x cross-architecture support
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build() {
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local applet
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# Use s390x busybox binary if available (cross-architecture support)
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if [[ -f "/work/output/busybox-s390x-static" ]]; then
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echo "Using s390x static busybox binary"
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add_file "/work/output/busybox-s390x-static" "/bin/busybox" 755
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# Create symlinks for busybox applets (using a known list since we can't execute cross-arch binary)
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local busybox_applets=(
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"[" "[[" "ash" "awk" "basename" "cat" "chgrp" "chmod" "chown" "cp" "cut"
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"date" "dd" "df" "dirname" "dmesg" "du" "echo" "env" "expr" "false"
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"find" "grep" "head" "hostname" "id" "kill" "ln" "ls" "mkdir" "mknod"
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"mktemp" "mount" "mv" "printf" "ps" "pwd" "readlink" "rm" "rmdir"
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"sed" "sh" "sleep" "sort" "stat" "tail" "tar" "test" "touch" "tr"
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"true" "umount" "uname" "uniq" "wc" "which" "whoami" "xargs"
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)
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for applet in "${busybox_applets[@]}"; do
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add_symlink "/usr/bin/$applet" busybox
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done
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elif [[ -f "/work/output/busybox-s390x-native" ]]; then
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echo "Using s390x busybox binary"
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add_file "/work/output/busybox-s390x-native" "/bin/busybox" 755
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# Create symlinks for busybox applets (using a known list since we can't execute cross-arch binary)
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local busybox_applets=(
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"[" "[[" "ash" "awk" "basename" "cat" "chgrp" "chmod" "chown" "cp" "cut"
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"date" "dd" "df" "dirname" "dmesg" "du" "echo" "env" "expr" "false"
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"find" "grep" "head" "hostname" "id" "kill" "ln" "ls" "mkdir" "mknod"
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"mktemp" "mount" "mv" "printf" "ps" "pwd" "readlink" "rm" "rmdir"
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"sed" "sh" "sleep" "sort" "stat" "tail" "tar" "test" "touch" "tr"
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"true" "umount" "uname" "uniq" "wc" "which" "whoami" "xargs"
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)
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for applet in "${busybox_applets[@]}"; do
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add_symlink "/usr/bin/$applet" busybox
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done
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else
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echo "Warning: s390x busybox not found, using system busybox (may cause architecture mismatch)"
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add_binary /usr/lib/initcpio/busybox /bin/busybox
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for applet in $(/usr/lib/initcpio/busybox --list 2>/dev/null || echo "sh ash"); do
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add_symlink "/usr/bin/$applet" busybox
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done
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fi
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# Add kmod with applet symlinks (if available)
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if type -P kmod >/dev/null 2>&1; then
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echo "Adding kmod utilities..."
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add_binary kmod
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for applet in {dep,ins,rm,ls}mod mod{probe,info}; do
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add_symlink "/usr/bin/$applet" kmod
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done
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else
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echo "Warning: kmod not found, module utilities will not be available"
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fi
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# Check for additional utilities (may not be available in cross-compile environment)
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for binary in blkid mount umount switch_root; do
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if type -P "$binary" >/dev/null 2>&1; then
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echo "Adding $binary"
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add_binary "$binary"
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else
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echo "Warning: $binary not found, skipping (functionality may be limited)"
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fi
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done
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# Always add init files
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echo "Adding init files..."
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add_file "/usr/lib/initcpio/init_functions" "/init_functions"
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add_file "/usr/lib/initcpio/init" "/init" 755
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}
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help() {
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cat <<HELPEOF
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This hook provides crucial runtime necessities for booting. This is a modified
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version with s390x cross-architecture support. DO NOT remove this hook unless
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you know what you're doing.
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HELPEOF
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}
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# vim: set ft=sh ts=4 sw=4 et:
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PATCH_EOF
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echo "✓ Applied s390x patches to base install hook"
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# Clean any existing build
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rm -rf build
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# Build with meson
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echo "Setting up meson build..."
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meson setup build --prefix=/usr --sysconfdir=/etc
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echo "Building mkinitcpio..."
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meson compile -C build
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echo "Installing mkinitcpio..."
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meson install -C build
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# Check where files were installed
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echo "Checking mkinitcpio installation..."
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find /usr -name "init_functions" -o -name "init" | grep initcpio || true
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ls -la /usr/lib/initcpio/ 2>/dev/null || true
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ls -la /usr/lib64/initcpio/ 2>/dev/null || true
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echo "Setting up s390x environment..."
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# Install missing dependencies
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echo "Installing required dependencies..."
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dnf install -y kmod-libs kmod util-linux busybox || echo "Warning: Some packages could not be installed"
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# Create kernel module directory structure
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KERNEL_DIR="/lib/modules/${KERNEL_VERSION}-s390x"
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mkdir -p "$KERNEL_DIR"
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# Create minimal modules.dep files to satisfy mkinitcpio
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touch "$KERNEL_DIR/modules.dep"
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touch "$KERNEL_DIR/modules.dep.bin"
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touch "$KERNEL_DIR/modules.alias"
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touch "$KERNEL_DIR/modules.alias.bin"
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# Copy kernel if it exists
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if [ -f "/work/output/vmlinuz-${KERNEL_VERSION}-s390x" ]; then
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cp "/work/output/vmlinuz-${KERNEL_VERSION}-s390x" "/boot/vmlinuz-${KERNEL_VERSION}-s390x"
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echo "Kernel copied to /boot/"
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fi
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# Ensure init files are in the correct location
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echo "Verifying init files installation..."
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if [ -f /usr/lib/initcpio/init ]; then
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echo "✓ /usr/lib/initcpio/init found"
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else
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echo "✗ /usr/lib/initcpio/init missing - copying from source"
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if [ -f /tmp/mkinitcpio/init ]; then
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mkdir -p /usr/lib/initcpio
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cp /tmp/mkinitcpio/init /usr/lib/initcpio/init
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chmod 755 /usr/lib/initcpio/init
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fi
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fi
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if [ -f /usr/lib/initcpio/init_functions ]; then
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echo "✓ /usr/lib/initcpio/init_functions found"
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else
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echo "✗ /usr/lib/initcpio/init_functions missing - copying from source"
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if [ -f /tmp/mkinitcpio/init_functions ]; then
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cp /tmp/mkinitcpio/init_functions /usr/lib/initcpio/init_functions
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fi
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fi
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# Create a minimal working s390x configuration
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echo "Creating minimal s390x configuration..."
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# Copy custom init if available
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if [ -f /work/custom-init ]; then
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echo "Using custom init for initramfs-only system"
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cp /work/custom-init /usr/lib/initcpio/init
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chmod 755 /usr/lib/initcpio/init
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fi
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cat > /etc/mkinitcpio-s390x.conf << 'CONFIG'
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# Minimal s390x mkinitcpio configuration
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# This config creates a basic initramfs without kernel modules
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MODULES=()
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BINARIES=()
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FILES=()
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# Only use base hook which provides busybox, init, and basic utilities
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HOOKS=(base)
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COMPRESSION="gzip"
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COMPRESSION_OPTIONS=(-6)
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CONFIG
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echo "Generating initramfs with mkinitcpio..."
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echo "Configuration:"
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cat /etc/mkinitcpio-s390x.conf
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# The s390x busybox integration is now handled by the patched base install hook
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echo "s390x busybox will be handled by the patched mkinitcpio base hook..."
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# Debug: List all files that mkinitcpio expects
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echo "Checking mkinitcpio dependencies:"
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ls -la /usr/lib/initcpio/ 2>/dev/null || echo "/usr/lib/initcpio/ not found"
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# Generate the initramfs with verbose output
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echo "Running mkinitcpio..."
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/usr/bin/mkinitcpio -c /etc/mkinitcpio-s390x.conf \
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-g "$INITRAMFS_OUTPUT" \
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-k "${KERNEL_VERSION}-s390x" \
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-v 2>&1 | tee /tmp/mkinitcpio.log
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echo "mkinitcpio generation completed!"
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if [ -f "$INITRAMFS_OUTPUT" ]; then
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ls -la "$INITRAMFS_OUTPUT"
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echo "Initramfs size: $(du -h "$INITRAMFS_OUTPUT" | cut -f1)"
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# Analyze the generated initramfs
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echo ""
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echo "Analyzing generated initramfs..."
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echo "Checking for critical files:"
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# Extract and check for init
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mkdir -p /tmp/initramfs-check
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cd /tmp/initramfs-check
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zcat "$INITRAMFS_OUTPUT" | cpio -id 2>/dev/null
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if [ -f init ]; then
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echo "✓ /init found"
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ls -la init
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else
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echo "✗ /init missing!"
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fi
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if [ -f init_functions ]; then
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echo "✓ /init_functions found"
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else
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echo "✗ /init_functions missing!"
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fi
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# Check for busybox and verify architecture
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if [ -f bin/busybox ]; then
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echo "✓ busybox found at /bin/busybox"
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file bin/busybox | grep -q "s390" && echo "✓ Verified s390x architecture in initramfs" || echo "⚠ Architecture may be incorrect"
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elif [ -f usr/bin/busybox ]; then
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echo "✓ busybox found at /usr/bin/busybox"
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file usr/bin/busybox | grep -q "s390" && echo "✓ Verified s390x architecture in initramfs" || echo "⚠ Architecture may be incorrect"
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else
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echo "✗ busybox missing from initramfs!"
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fi
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# List first 20 files
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echo ""
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echo "First 20 files in initramfs:"
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find . -type f | head -20
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# Cleanup
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cd /
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rm -rf /tmp/initramfs-check
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echo ""
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echo "✓ Success!"
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else
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echo "✗ Failed to generate initramfs"
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exit 1
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fi
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EOF
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chmod +x "$PROJECT_ROOT/build-final-initramfs.sh"
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# Copy the mkinitcpio source to our project for mounting
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echo -e "${YELLOW}Copying mkinitcpio source...${NC}"
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rm -rf "$PROJECT_ROOT/mkinitcpio-source"
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cp -r "$MKINITCPIO_SOURCE" "$PROJECT_ROOT/mkinitcpio-source"
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# Run mkinitcpio in container
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echo -e "${YELLOW}Running modified mkinitcpio for s390x...${NC}"
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sudo podman run --rm \
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-v "$PROJECT_ROOT:/work" \
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-w /work \
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--privileged \
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s390x-mkinitcpio-complete \
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/work/build-final-initramfs.sh
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# Clean up copied source
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rm -rf "$PROJECT_ROOT/mkinitcpio-source"
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# Check result
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if [ -f "$OUTPUT_DIR/$INITRAMFS_NAME" ]; then
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SIZE=$(du -h "$OUTPUT_DIR/$INITRAMFS_NAME" | cut -f1)
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echo -e "${GREEN}✓ Initramfs created with modified mkinitcpio: $OUTPUT_DIR/$INITRAMFS_NAME (${SIZE})${NC}"
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# Update todo to completed
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echo -e "${YELLOW}Marking initramfs build as completed...${NC}"
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else
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echo -e "${RED}✗ Failed to create initramfs with modified mkinitcpio${NC}"
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exit 1
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fi
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