135 lines
4.3 KiB
Bash
Executable File
135 lines
4.3 KiB
Bash
Executable File
#!/bin/bash
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##############################################################################
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# parabola-imagebuilder #
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# #
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# Copyright (C) 2017 Andreas Grapentin #
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# #
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# This program is free software: you can redistribute it and/or modify #
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# it under the terms of the GNU General Public License as published by #
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# the Free Software Foundation, either version 3 of the License, or #
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# (at your option) any later version. #
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# #
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# This program is distributed in the hope that it will be useful, #
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# but WITHOUT ANY WARRANTY; without even the implied warranty of #
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #
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# GNU General Public License for more details. #
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# #
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# You should have received a copy of the GNU General Public License #
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# along with this program. If not, see <http://www.gnu.org/licenses/>. #
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##############################################################################
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# this is a convenience script to start a created VM
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##############################################################################
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# common directories
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startdir="$(pwd)"
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export TOPBUILDDIR="$startdir"/build
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export TOPSRCDIR="$startdir"/src
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mkdir -p "$TOPBUILDDIR"
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chown "$SUDO_USER" "$TOPBUILDDIR"
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# shellcheck source=src/shared/common.sh
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. "$TOPSRCDIR"/shared/common.sh
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# sanity checks
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if [ "$(id -u)" -ne 0 ]; then
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die -e "$ERROR_INVOCATION" "must be root"
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fi
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# shellcheck source=src/qemu.sh
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. "$TOPSRCDIR"/qemu.sh
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check_kernel_arch() {
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echo -n "checking for kernel name ..."
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local kernel
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kernel=$(find "$1" -maxdepth 1 -type f -iname '*vmlinu*' | head -n1)
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[ -n "$kernel" ] || kernel=no
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echo "$(basename "$kernel")"
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[ "x$kernel" != "xno" ] || return
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# check if the kernel has an elf header and extract arch
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echo -n "checking for kernel elf header ... "
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set -o pipefail
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machine=$(readelf -h "$kernel" 2>/dev/null | grep Machine | awk '{print $2}') || machine=no
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set +o pipefail
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echo "$machine"
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[ "x$machine" != "xno" ] && return
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# no elf header? maybe arm?
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echo -n "checking for ARM boot executable ... "
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local is_arm=no
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file "$kernel" | grep -q 'ARM boot executable' && is_arm=yes
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echo "$is_arm"
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[ "x$is_arm" == "xyes" ] && machine=ARM
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[ "x$machine" != "xno" ] && return
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# no idea, just bail.
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error "unable to extract kernel arch from image"
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return "$ERROR_MISSING"
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}
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qemu_setargs_arm() {
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qemu_args=(
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-snapshot
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-nographic
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-machine vexpress-a9
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-cpu cortex-a9
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-m 1G
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-kernel "$1"/vmlinuz-linux-libre
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-dtb "$1"/dtbs/linux-libre/vexpress-v2p-ca9.dtb
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-initrd "$1"/initramfs-linux-libre.img
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--append "console=ttyAMA0 rw root=/dev/mmcblk0p3"
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-drive if=sd,driver=raw,cache=writeback,file="$2"
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)
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}
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qemu_setargs_riscv64() {
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qemu_args=(
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-snapshot
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-nographic
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-machine virt
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-m 2G
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-kernel bbl
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-append "console=ttyS0 rw root=/dev/vda"
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-drive file="${3}p3",format=raw,id=hd0
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-device virtio-blk-device,drive=hd0
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-object rng-random,filename=/dev/urandom,id=rng0
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-device virtio-rng-device,rng=rng0
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-device virtio-net-device,netdev=usernet
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-netdev user,id=usernet
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)
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}
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boot_from_image() {
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[ -f "$1" ] || die "$1: image does not exist"
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local loopdev
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qemu_img_losetup "$1" || return
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# mount the boot partition
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mkdir -p "$TOPBUILDDIR"/mnt
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mount "${loopdev}p1" "$TOPBUILDDIR"/mnt || return
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trap_add "umount -R $TOPBUILDDIR/mnt" INT TERM EXIT
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local machine
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check_kernel_arch "$TOPBUILDDIR"/mnt || return
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case "$machine" in
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RISC-V) arch=riscv64 ;;
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ARM) arch=arm ;;
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*) error "unrecognized machine '$machine'"
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return "$ERROR_UNSPECIFIED" ;;
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esac
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qemu_args=()
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"qemu_setargs_$arch" "$TOPBUILDDIR"/mnt "$1" "$loopdev"
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QEMU_AUDIO_DRV=none "qemu-system-$arch" "${qemu_args[@]}"
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}
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boot_from_image "$1" || die "boot failed"
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