#!/bin/sh -
#
# Copyright 2004 John-Mark Gurney
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
# $FreeBSD: head/tools/debugscripts/kgdb 143864 2005-03-20 02:08:21Z jmg $

crashpath="/var/crash"
kld_debpy="kld_deb.py"

if [ x"$1" = x"-?" -o x"$1" = x"-h" ]; then
	echo "Usage: $0 <corenum> [ <gdbcmdfile> [ <modulepaths> ] ]"
	echo ""
	echo "Path for crash dumps: $crashpath"
	exit 1
fi

if [ x"$1" = x"" ]; then
	echo "Need core number."
	exit 1
fi
corenum="$1"
shift

cmd_file=""
if [ x"$2" != x"" ]; then
	cmd_file="-x $2"
	shift
fi

core="$crashpath/vmcore.$corenum"
info="$crashpath/info.$corenum"

#Get the kernel source compile dir from the info file
kernsrc="`awk 'i == 1 { split($0, a, ":"); print a[2]; i = 0 } $1 == "Versionstring:" { i = 1 }' < "$info"`"

tmpfile="/tmp/kgdb.asf.$$"
# -mapped (broken?)
# -x command_file
echo "Kernel Source:	$kernsrc"
echo "Getting KLD information and locations..."
python $kld_debpy "$kernsrc" "$core" $@ > "$tmpfile" &&
echo "Please run the following command to load module symbols:"
echo "source $tmpfile"
(cd "$kernsrc"; kgdb "$kernsrc/kernel.debug" "$core")
rm "$tmpfile"