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linux-kernel-module-cheat/runqemu

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#!/usr/bin/env bash
set -e
# CLI handling.
arch='x86_64'
debug=false
debug_qemu=''
kgdb=false
nographic=false
extra_append=''
extra_flags=''
while getopts a:de:knqt: OPT; do
case "$OPT" in
a)
arch="$OPTARG"
;;
d)
debug=true
extra_flags="$extra_flags -S -s"
;;
e)
extra_append="$extra_append $OPTARG"
;;
k)
debug=true
extra_append="$extra_append kgdbwait"
# For those who want to try KDB.
#extra_append="$extra_append kgdbwait kgdboc=kbd"
extra_flags="$extra_flags -serial tcp::1234,server,nowait"
kgdb=true
;;
n)
extra_append="$extra_append console=ttyS0"
extra_flags="$extra_flags -nographic"
nographic=true
;;
q)
debug_qemu='gdb -q -ex start --args'
;;
esac
done
shift "$(($OPTIND - 1))"
extra_flags="$extra_flags $@"
buildroot_out_dir="./buildroot/output.${arch}~"
images_dir="$buildroot_out_dir/images"
qemu_common="\
$debug_qemu \
$buildroot_out_dir/host/usr/bin/qemu-system-${arch} \
-m 128M \
-monitor telnet::45454,server,nowait \
-net user \
-smp 1 \
"
# The base QEMU commands are found under board/qemu/*/readme.tx
case "$arch" in
'x86_64')
if $kgdb; then
extra_append="$extra_append kgdboc=ttyS0,115200"
fi
cmd="$qemu_common \
-M pc \
-append 'root=/dev/vda $extra_append' \
-device edu \
-device lkmc_pci_min \
-drive file=${images_dir}/rootfs.ext2,if=virtio,format=raw \
-kernel ${images_dir}/bzImage \
-net nic,model=virtio \
$extra_flags
"
;;
'arm')
if $kgdb; then
extra_append="$extra_append kgdboc=ttyAMA0,115200"
fi
cmd="$qemu_common \
-M versatilepb \
-append 'root=/dev/sda $extra_append' \
-drive file=${images_dir}/rootfs.ext2,if=scsi,format=raw \
-dtb ${images_dir}/versatile-pb.dtb \
-kernel ${images_dir}/zImage \
-net nic,model=rtl8139 \
-serial stdio \
$extra_flags
"
;;
'mips64')
cmd="$qemu_common \
-M malta \
-append 'root=/dev/hda $extra_append' \
-cpu I6400 \
-drive file=${images_dir}/rootfs.ext2,format=raw \
-kernel ${images_dir}/vmlinux \
-nographic \
-net nic,model=pcnet \
$extra_flags
"
;;
esac
eval "$cmd"