Set up log/debug Linux kernel session w/ QEMU in tmux

tmux-vm.sh

#!/bin/sh
# SPDX-License-Identifier: MIT

## Copyright (C) 2012 Przemyslaw Pawelczyk <[email protected]>
##
## This script is licensed under the terms of the MIT license.
## https://opensource.org/licenses/MIT

LDIR="$HOME/qemu"
KDIR="$LDIR/$1"

if [ -z "$1" -o ! -d "$KDIR" ]; then
	echo "Please specify existing kernel directory under $LDIR"
	exit 1
fi

VD="$LDIR/squeeze64.img"
BI="$KDIR/arch/x86/boot/bzImage"
VL="$KDIR/vmlinux"

if ! [ -r "$VD" -a -r "$BI" -a -r "$VL" ]; then
	echo -e "At least one of files:\n$VD\n$BI\n$VL\ncannot be read"
	exit 1
fi

if tmux has-session -t vm 2>/dev/null; then
	echo "vm session already running"
	exit 1
fi

export PATH="$HOME/+/builds/gdb/gdb:$HOME/+/builds/qemu/x86_64-softmmu:$PATH"
LOGFILE="$LDIR/serial_$(date +%s).log"

(
	echo $VL
	uname -a
	qemu --version
	gdb --version | sed 1q
	echo
) >> "$LOGFILE"

EMU_CMD="qemu-system-x86_64 -hda $VD -kernel $BI -append 'root=\"/dev/hda\" ro console=ttyS0 no-kvmclock' -net nic,model=e1000 -net user,hostfwd=tcp::10022-:22 -m 128 -nographic -no-hpet -rtc clock=vm -s -enable-kvm -serial file:$LOGFILE"
LOG_CMD="tail -f $LOGFILE"
GDB_CMD="cgdb $VL"
SSH_CMD="ssh qemu"

tmux start-server
tmux new-session -d -s vm
tmux set-option -g history-limit 10000
tmux new-window -n log -t vm:1 "$LOG_CMD"
tmux new-window -n gdb -t vm:2 "$GDB_CMD"
tmux new-window -n ssh -t vm:3
tmux new-window -n emu -t vm:4 "$EMU_CMD"
tmux select-window -t vm:log
tmux set-window-option -g monitor-activity on
tmux send-keys -t vm:ssh "$SSH_CMD"
exec tmux attach -t vm

commit c0da48b263b0767b496664f7fc2832e3bf4661af
Author: Przemyslaw Pawelczyk <[email protected]>
Date:   2018-02-06 14:53:28 +0100

    tmux-vm.sh: Add copyright notice and MIT license notice.

commit 312ddf6494f5c8edd8825c5dda2930476e3a9f25
Author: Przemyslaw Pawelczyk <[email protected]>
Date:   2018-02-06 14:53:44 +0100

    Add SPDX License Identifier.

    The Software Package Data Exchange (SPDX) is a good initiative, it has
    matured over time and deserves accelerated adoption in open-source.

    https://spdx.org/learn
    https://spdx.org/using-spdx
    https://spdx.org/license-list