#! /bin/sh -e
#
# Merges kernel and ramdisk into one ECOFF bootimage

SUBARCH=IP22

LIBDIR=/usr/lib/tip22
TIP22=$LIBDIR/tftpload.$SUBARCH.o
ARCLIB=$LIBDIR/libarc.a
LD_KERNEL=$LIBDIR/ld.kernel.script.$SUBARCH
LD_RAMDISK=$LIBDIR/ld.ramdisk.script.$SUBARCH
LD_SCRIPT=$LIBDIR/ld.script.$SUBARCH
LDFLAGS="-N"
LD=/usr/bin/ld
MKTEMP=/bin/mktemp

usage() {
    echo "`basename $0` vmlinux initrd outfile"
    exit 1
}

if [ "$#" != "3" ]; then
	usage
fi

if ! file $2 | grep 'gzip compressed data' > /dev/null 2>&1; then
	echo "$2 is no gzip compressed ramdisk".
	usage
fi

if ! file $1 | grep 'ELF .* MIPS' > /dev/null 2>&1; then
	echo "$1 is no ELF kernel".
	usage
fi

if [ ! -x $MKTEMP ]; then
	echo "Need mktemp."
	exit 1
fi

if ! TMPDIR=`mktemp -d`; then
	echo "mktemp failed."
	exit 1
fi

echo -n "Merging kernel \"$1\" and ramdisk \"$2\" into bootimage \"$3\"..."
${LD} -T $LD_KERNEL -b binary -o $TMPDIR/kernel.o $1
${LD} -T $LD_RAMDISK -b binary -o $TMPDIR/ramdisk.o $2
${LD} -T $LD_SCRIPT ${LDFLAGS} -o $3 ${TIP22} ${ARCLIB} $TMPDIR/kernel.o $TMPDIR/ramdisk.o
rm -rf $TMPDIR
echo "done."