[deliverable/linux.git] / arch / powerpc / boot / wrapper

#!/bin/sh

# Copyright (C) 2006 Paul Mackerras, IBM Corporation <paulus@samba.org>
# This program may be used under the terms of version 2 of the GNU
# General Public License.

# This script takes a kernel binary and optionally an initrd image
# and/or a device-tree blob, and creates a bootable zImage for a
# given platform.

# Options:
# -o zImage	specify output file
# -p platform	specify platform (links in $platform.o)
# -i initrd	specify initrd file
# -d devtree	specify device-tree blob
# -s tree.dts	specify device-tree source file (needs dtc installed)
# -c		cache $kernel.strip.gz (use if present & newer, else make)
# -C prefix	specify command prefix for cross-building tools
#		(strip, objcopy, ld)
# -D dir	specify directory containing data files used by script
#		(default ./arch/powerpc/boot)
# -W dir	specify working directory for temporary files (default .)

# Stop execution if any command fails
set -e

# Allow for verbose output
if [ "$V" = 1 ]; then
    set -x
fi

# defaults
kernel=
ofile=zImage
platform=of
initrd=
dtb=
dts=
cacheit=
binary=
gzip=.gz

# cross-compilation prefix
CROSS=

# directory for object and other files used by this script
object=arch/powerpc/boot
objbin=$object

# directory for working files
tmpdir=.

usage() {
    echo 'Usage: wrapper [-o output] [-p platform] [-i initrd]' >&2
    echo '       [-d devtree] [-s tree.dts] [-c] [-C cross-prefix]' >&2
    echo '       [-D datadir] [-W workingdir] [--no-gzip] [vmlinux]' >&2
    exit 1
}

while [ "$#" -gt 0 ]; do
    case "$1" in
    -o)
	shift
	[ "$#" -gt 0 ] || usage
	ofile="$1"
	;;
    -p)
	shift
	[ "$#" -gt 0 ] || usage
	platform="$1"
	;;
    -i)
	shift
	[ "$#" -gt 0 ] || usage
	initrd="$1"
	;;
    -d)
	shift
	[ "$#" -gt 0 ] || usage
	dtb="$1"
	;;
    -s)
	shift
	[ "$#" -gt 0 ] || usage
	dts="$1"
	;;
    -c)
	cacheit=y
	;;
    -C)
	shift
	[ "$#" -gt 0 ] || usage
	CROSS="$1"
	;;
    -D)
	shift
	[ "$#" -gt 0 ] || usage
	object="$1"
	objbin="$1"
	;;
    -W)
	shift
	[ "$#" -gt 0 ] || usage
	tmpdir="$1"
	;;
    --no-gzip)
        gzip=
        ;;
    -?)
	usage
	;;
    *)
	[ -z "$kernel" ] || usage
	kernel="$1"
	;;
    esac
    shift
done

if [ -n "$dts" ]; then
    if [ ! -r "$dts" -a -r "$object/dts/$dts" ]; then
	dts="$object/dts/$dts"
    fi
    if [ -z "$dtb" ]; then
	dtb="$platform.dtb"
    fi
    $object/dtc -O dtb -o "$dtb" -b 0 "$dts"
fi

if [ -z "$kernel" ]; then
    kernel=vmlinux
fi

platformo=$object/"$platform".o
lds=$object/zImage.lds
ext=strip
objflags=-S
tmp=$tmpdir/zImage.$$.o
ksection=.kernel:vmlinux.strip
isection=.kernel:initrd
link_address='0x400000'

case "$platform" in
pseries)
    platformo=$object/of.o
    link_address='0x4000000'
    ;;
pmac|chrp)
    platformo=$object/of.o
    ;;
coff)
    platformo=$object/of.o
    lds=$object/zImage.coff.lds
    link_address='0x500000'
    ;;
miboot|uboot)
    # miboot and U-boot want just the bare bits, not an ELF binary
    ext=bin
    objflags="-O binary"
    tmp="$ofile"
    ksection=image
    isection=initrd
    ;;
cuboot*)
    binary=y
    gzip=
    case "$platform" in
    *-mpc866ads|*-mpc885ads|*-adder875*|*-ep88xc)
        platformo=$object/cuboot-8xx.o
        ;;
    *5200*|*-motionpro)
        platformo=$object/cuboot-52xx.o
        ;;
    *-pq2fads|*-ep8248e|*-mpc8272*|*-storcenter)
        platformo=$object/cuboot-pq2.o
        ;;
    *-mpc824*)
        platformo=$object/cuboot-824x.o
        ;;
    *-mpc83*|*-asp834x*)
        platformo=$object/cuboot-83xx.o
        ;;
    *-tqm8541|*-mpc8560*|*-tqm8560|*-tqm8555|*-ksi8560*)
        platformo=$object/cuboot-85xx-cpm2.o
        ;;
    *-mpc85*|*-tqm85*|*-sbc85*)
        platformo=$object/cuboot-85xx.o
        ;;
    *-amigaone)
        link_address='0x800000'
        ;;
    esac
    ;;
ps3)
    platformo="$object/ps3-head.o $object/ps3-hvcall.o $object/ps3.o"
    lds=$object/zImage.ps3.lds
    gzip=
    ext=bin
    objflags="-O binary --set-section-flags=.bss=contents,alloc,load,data"
    ksection=.kernel:vmlinux.bin
    isection=.kernel:initrd
    link_address=''
    ;;
ep88xc|ep405|ep8248e)
    platformo="$object/fixed-head.o $object/$platform.o"
    binary=y
    ;;
adder875-redboot)
    platformo="$object/fixed-head.o $object/redboot-8xx.o"
    binary=y
    ;;
simpleboot-virtex405-*)
    platformo="$object/virtex405-head.o $object/simpleboot.o $object/virtex.o"
    binary=y
    ;;
simpleboot-virtex440-*)
    platformo="$object/simpleboot.o $object/virtex.o"
    binary=y
    ;;
simpleboot-*)
    platformo="$object/simpleboot.o"
    binary=y
    ;;
asp834x-redboot)
    platformo="$object/fixed-head.o $object/redboot-83xx.o"
    binary=y
    ;;
esac

vmz="$tmpdir/`basename \"$kernel\"`.$ext"
if [ -z "$cacheit" -o ! -f "$vmz$gzip" -o "$vmz$gzip" -ot "$kernel" ]; then
    ${CROSS}objcopy $objflags "$kernel" "$vmz.$$"

    if [ -n "$gzip" ]; then
        gzip -f -9 "$vmz.$$"
    fi

    if [ -n "$cacheit" ]; then
	mv -f "$vmz.$$$gzip" "$vmz$gzip"
    else
	vmz="$vmz.$$"
    fi
fi

vmz="$vmz$gzip"

# Extract kernel version information, some platforms want to include
# it in the image header
version=`${CROSS}strings "$kernel" | grep '^Linux version [-0-9.]' | \
    cut -d' ' -f3`
if [ -n "$version" ]; then
    uboot_version="-n Linux-$version"
fi

# physical offset of kernel image
membase=`${CROSS}objdump -p "$kernel" | grep -m 1 LOAD | awk '{print $7}'`

case "$platform" in
uboot)
    rm -f "$ofile"
    mkimage -A ppc -O linux -T kernel -C gzip -a $membase -e $membase \
	$uboot_version -d "$vmz" "$ofile"
    if [ -z "$cacheit" ]; then
	rm -f "$vmz"
    fi
    exit 0
    ;;
esac

addsec() {
    ${CROSS}objcopy $4 $1 \
	--add-section=$3="$2" \
	--set-section-flags=$3=contents,alloc,load,readonly,data
}

addsec $tmp "$vmz" $ksection $object/empty.o
if [ -z "$cacheit" ]; then
    rm -f "$vmz"
fi

if [ -n "$initrd" ]; then
    addsec $tmp "$initrd" $isection
fi

if [ -n "$dtb" ]; then
    addsec $tmp "$dtb" .kernel:dtb
    if [ -n "$dts" ]; then
	rm $dtb
    fi
fi

if [ "$platform" != "miboot" ]; then
    if [ -n "$link_address" ] ; then
        text_start="-Ttext $link_address --defsym _start=$link_address"
    fi
    ${CROSS}ld -m elf32ppc -T $lds $text_start -o "$ofile" \
	$platformo $tmp $object/wrapper.a
    rm $tmp
fi

# Some platforms need the zImage's entry point and base address
base=0x`${CROSS}nm "$ofile" | grep ' _start$' | cut -d' ' -f1`
entry=`${CROSS}objdump -f "$ofile" | grep '^start address ' | cut -d' ' -f3`

if [ -n "$binary" ]; then
    mv "$ofile" "$ofile".elf
    ${CROSS}objcopy -O binary "$ofile".elf "$ofile"
fi

# post-processing needed for some platforms
case "$platform" in
pseries|chrp)
    $objbin/addnote "$ofile"
    ;;
coff)
    ${CROSS}objcopy -O aixcoff-rs6000 --set-start "$entry" "$ofile"
    $objbin/hack-coff "$ofile"
    ;;
cuboot*)
    gzip -f -9 "$ofile"
    mkimage -A ppc -O linux -T kernel -C gzip -a "$base" -e "$entry" \
            $uboot_version -d "$ofile".gz "$ofile"
    ;;
treeboot*)
    mv "$ofile" "$ofile.elf"
    $objbin/mktree "$ofile.elf" "$ofile" "$base" "$entry"
    if [ -z "$cacheit" ]; then
	rm -f "$ofile.elf"
    fi
    exit 0
    ;;
ps3)
    # The ps3's loader supports loading a gzipped binary image from flash
    # rom to ram addr zero. The loader then enters the system reset
    # vector at addr 0x100.  A bootwrapper overlay is used to arrange for
    # a binary image of the kernel to be at addr zero, and yet have a
    # suitable bootwrapper entry at 0x100.  To construct the final rom
    # image 512 bytes from offset 0x100 is copied to the bootwrapper
    # place holder at symbol __system_reset_kernel.  The 512 bytes of the
    # bootwrapper entry code at symbol __system_reset_overlay is then
    # copied to offset 0x100.  At runtime the bootwrapper program copies
    # the data at __system_reset_kernel back to addr 0x100.

    system_reset_overlay=0x`${CROSS}nm "$ofile" \
        | grep ' __system_reset_overlay$'       \
        | cut -d' ' -f1`
    system_reset_overlay=`printf "%d" $system_reset_overlay`
    system_reset_kernel=0x`${CROSS}nm "$ofile" \
        | grep ' __system_reset_kernel$'       \
        | cut -d' ' -f1`
    system_reset_kernel=`printf "%d" $system_reset_kernel`
    overlay_dest="256"
    overlay_size="512"

    ${CROSS}objcopy -O binary "$ofile" "$ofile.bin"

    dd if="$ofile.bin" of="$ofile.bin" conv=notrunc   \
        skip=$overlay_dest seek=$system_reset_kernel  \
        count=$overlay_size bs=1

    dd if="$ofile.bin" of="$ofile.bin" conv=notrunc   \
        skip=$system_reset_overlay seek=$overlay_dest \
        count=$overlay_size bs=1

    odir="$(dirname "$ofile.bin")"
    rm -f "$odir/otheros.bld"
    gzip --force -9 --stdout "$ofile.bin" > "$odir/otheros.bld"
    ;;
esac
Commit	Line	Data
2bf11819 PM	1	#!/bin/sh
	2
	3	# Copyright (C) 2006 Paul Mackerras, IBM Corporation <paulus@samba.org>
	4	# This program may be used under the terms of version 2 of the GNU
	5	# General Public License.
	6
	7	# This script takes a kernel binary and optionally an initrd image
	8	# and/or a device-tree blob, and creates a bootable zImage for a
	9	# given platform.
	10
	11	# Options:
	12	# -o zImage specify output file
	13	# -p platform specify platform (links in $platform.o)
	14	# -i initrd specify initrd file
	15	# -d devtree specify device-tree blob
	16	# -s tree.dts specify device-tree source file (needs dtc installed)
	17	# -c cache $kernel.strip.gz (use if present & newer, else make)
	18	# -C prefix specify command prefix for cross-building tools
	19	# (strip, objcopy, ld)
	20	# -D dir specify directory containing data files used by script
	21	# (default ./arch/powerpc/boot)
	22	# -W dir specify working directory for temporary files (default .)
	23
d4740373 GL	24	# Stop execution if any command fails
	25	set -e
	26
7f66c1fd GL	27	# Allow for verbose output
	28	if [ "$V" = 1 ]; then
	29	set -x
	30	fi
	31
2bf11819 PM	32	# defaults
	33	kernel=
	34	ofile=zImage
	35	platform=of
	36	initrd=
	37	dtb=
	38	dts=
	39	cacheit=
11c146cc	40	binary=
a9903811	41	gzip=.gz
2bf11819 PM	42
	43	# cross-compilation prefix
	44	CROSS=
	45
	46	# directory for object and other files used by this script
	47	object=arch/powerpc/boot
5c539ee3	48	objbin=$object
2bf11819 PM	49
	50	# directory for working files
	51	tmpdir=.
	52
	53	usage() {
	54	echo 'Usage: wrapper [-o output] [-p platform] [-i initrd]' >&2
	55	echo ' [-d devtree] [-s tree.dts] [-c] [-C cross-prefix]' >&2
a9903811	56	echo ' [-D datadir] [-W workingdir] [--no-gzip] [vmlinux]' >&2
2bf11819 PM	57	exit 1
	58	}
	59
	60	while [ "$#" -gt 0 ]; do
	61	case "$1" in
	62	-o)
	63	shift
	64	[ "$#" -gt 0 ] \|\| usage
	65	ofile="$1"
	66	;;
	67	-p)
	68	shift
	69	[ "$#" -gt 0 ] \|\| usage
	70	platform="$1"
	71	;;
	72	-i)
	73	shift
	74	[ "$#" -gt 0 ] \|\| usage
	75	initrd="$1"
	76	;;
	77	-d)
	78	shift
	79	[ "$#" -gt 0 ] \|\| usage
	80	dtb="$1"
	81	;;
	82	-s)
	83	shift
	84	[ "$#" -gt 0 ] \|\| usage
	85	dts="$1"
	86	;;
	87	-c)
	88	cacheit=y
	89	;;
	90	-C)
	91	shift
	92	[ "$#" -gt 0 ] \|\| usage
	93	CROSS="$1"
	94	;;
	95	-D)
	96	shift
	97	[ "$#" -gt 0 ] \|\| usage
	98	object="$1"
5c539ee3	99	objbin="$1"
2bf11819 PM	100	;;
	101	-W)
	102	shift
	103	[ "$#" -gt 0 ] \|\| usage
	104	tmpdir="$1"
	105	;;
a9903811 SW	106	--no-gzip)
	107	gzip=
	108	;;
2bf11819 PM	109	-?)
	110	usage
	111	;;
	112	*)
	113	[ -z "$kernel" ] \|\| usage
	114	kernel="$1"
	115	;;
	116	esac
	117	shift
	118	done
	119
	120	if [ -n "$dts" ]; then
701172d1 DW	121	if [ ! -r "$dts" -a -r "$object/dts/$dts" ]; then
	122	dts="$object/dts/$dts"
	123	fi
2bf11819 PM	124	if [ -z "$dtb" ]; then
	125	dtb="$platform.dtb"
	126	fi
e2dc87a1	127	$object/dtc -O dtb -o "$dtb" -b 0 "$dts"
2bf11819 PM	128	fi
	129
	130	if [ -z "$kernel" ]; then
	131	kernel=vmlinux
	132	fi
	133
	134	platformo=$object/"$platform".o
	135	lds=$object/zImage.lds
	136	ext=strip
	137	objflags=-S
	138	tmp=$tmpdir/zImage.$$.o
	139	ksection=.kernel:vmlinux.strip
	140	isection=.kernel:initrd
9b09c6d9	141	link_address='0x400000'
2bf11819 PM	142
2bf11819 PM	143	case "$platform" in
9b09c6d9 TB	144	pseries)
	145	platformo=$object/of.o
	146	link_address='0x4000000'
	147	;;
	148	pmac\|chrp)
2bf11819 PM	149	platformo=$object/of.o
2bf11819 PM	150	;;
627aa944	151	coff)
2bf11819 PM	152	platformo=$object/of.o
2bf11819 PM	153	lds=$object/zImage.coff.lds
9b09c6d9	154	link_address='0x500000'
2bf11819 PM	155	;;
	156	miboot\|uboot)
	157	# miboot and U-boot want just the bare bits, not an ELF binary
	158	ext=bin
	159	objflags="-O binary"
	160	tmp="$ofile"
	161	ksection=image
	162	isection=initrd
	163	;;
0fdd717e	164	cuboot*)
11c146cc	165	binary=y
0fdd717e	166	gzip=
25431333	167	case "$platform" in
8dd217b2	168	-mpc866ads\|-mpc885ads\|-adder875\|*-ep88xc)
25431333 GL	169	platformo=$object/cuboot-8xx.o
	170	;;
	171	5200\|*-motionpro)
	172	platformo=$object/cuboot-52xx.o
	173	;;
	174	-pq2fads\|-ep8248e\|-mpc8272\|*-storcenter)
	175	platformo=$object/cuboot-pq2.o
	176	;;
	177	-mpc824)
	178	platformo=$object/cuboot-824x.o
	179	;;
59d13f9d	180	-mpc83\|-asp834x)
25431333 GL	181	platformo=$object/cuboot-83xx.o
25431333 GL	182	;;
ff880112	183	-tqm8541\|-mpc8560\|-tqm8560\|-tqm8555\|-ksi8560*)
25431333 GL	184	platformo=$object/cuboot-85xx-cpm2.o
25431333 GL	185	;;
6dd1b64a	186	-mpc85\|-tqm85\|-sbc85)
25431333 GL	187	platformo=$object/cuboot-85xx.o
25431333 GL	188	;;
8f23735d GP	189	*-amigaone)
	190	link_address='0x800000'
	191	;;
25431333	192	esac
0fdd717e	193	;;
bafdb645 GL	194	ps3)
	195	platformo="$object/ps3-head.o $object/ps3-hvcall.o $object/ps3.o"
	196	lds=$object/zImage.ps3.lds
	197	gzip=
	198	ext=bin
	199	objflags="-O binary --set-section-flags=.bss=contents,alloc,load,data"
	200	ksection=.kernel:vmlinux.bin
	201	isection=.kernel:initrd
9b09c6d9	202	link_address=''
bafdb645	203	;;
a55387e5	204	ep88xc\|ep405\|ep8248e)
11c146cc SW	205	platformo="$object/fixed-head.o $object/$platform.o"
	206	binary=y
	207	;;
a55387e5 SW	208	adder875-redboot)
	209	platformo="$object/fixed-head.o $object/redboot-8xx.o"
	210	binary=y
	211	;;
d2477b5c	212	simpleboot-virtex405-*)
d58577d8 JL	213	platformo="$object/virtex405-head.o $object/simpleboot.o $object/virtex.o"
	214	binary=y
	215	;;
	216	simpleboot-virtex440-*)
	217	platformo="$object/simpleboot.o $object/virtex.o"
d2477b5c GL	218	binary=y
d2477b5c GL	219	;;
1d46e379 GL	220	simpleboot-*)
	221	platformo="$object/simpleboot.o"
	222	binary=y
	223	;;
59d13f9d BD	224	asp834x-redboot)
	225	platformo="$object/fixed-head.o $object/redboot-83xx.o"
	226	binary=y
	227	;;
2bf11819 PM	228	esac
	229
	230	vmz="$tmpdir/`basename \"$kernel\"`.$ext"
1383a34f	231	if [ -z "$cacheit" -o ! -f "$vmz$gzip" -o "$vmz$gzip" -ot "$kernel" ]; then
2bf11819	232	${CROSS}objcopy $objflags "$kernel" "$vmz.$$"
a9903811 SW	233
	234	if [ -n "$gzip" ]; then
	235	gzip -f -9 "$vmz.$$"
	236	fi
	237
2bf11819	238	if [ -n "$cacheit" ]; then
a9903811	239	mv -f "$vmz.$$$gzip" "$vmz$gzip"
2bf11819 PM	240	else
	241	vmz="$vmz.$$"
	242	fi
	243	fi
	244
a9903811 SW	245	vmz="$vmz$gzip"
a9903811 SW	246
a6afacb6 DG	247	# Extract kernel version information, some platforms want to include
	248	# it in the image header
	249	version=`${CROSS}strings "$kernel" \| grep '^Linux version [-0-9.]' \| \
	250	cut -d' ' -f3`
	251	if [ -n "$version" ]; then
	252	uboot_version="-n Linux-$version"
	253	fi
0fdd717e	254
b18796d3 KG	255	# physical offset of kernel image
	256	membase=`${CROSS}objdump -p "$kernel" \| grep -m 1 LOAD \| awk '{print $7}'`
	257
0fdd717e SW	258	case "$platform" in
	259	uboot)
	260	rm -f "$ofile"
b18796d3	261	mkimage -A ppc -O linux -T kernel -C gzip -a $membase -e $membase \
a6afacb6	262	$uboot_version -d "$vmz" "$ofile"
2bf11819	263	if [ -z "$cacheit" ]; then
a9903811	264	rm -f "$vmz"
2bf11819 PM	265	fi
	266	exit 0
	267	;;
	268	esac
	269
	270	addsec() {
	271	${CROSS}objcopy $4 $1 \
	272	--add-section=$3="$2" \
	273	--set-section-flags=$3=contents,alloc,load,readonly,data
	274	}
	275
a9903811	276	addsec $tmp "$vmz" $ksection $object/empty.o
2bf11819	277	if [ -z "$cacheit" ]; then
a9903811	278	rm -f "$vmz"
2bf11819 PM	279	fi
	280
	281	if [ -n "$initrd" ]; then
c888554b	282	addsec $tmp "$initrd" $isection
2bf11819 PM	283	fi
	284
	285	if [ -n "$dtb" ]; then
c888554b	286	addsec $tmp "$dtb" .kernel:dtb
e9c4b4bd MG	287	if [ -n "$dts" ]; then
	288	rm $dtb
	289	fi
2bf11819 PM	290	fi
	291
	292	if [ "$platform" != "miboot" ]; then
9b09c6d9 TB	293	if [ -n "$link_address" ] ; then
	294	text_start="-Ttext $link_address --defsym _start=$link_address"
	295	fi
	296	${CROSS}ld -m elf32ppc -T $lds $text_start -o "$ofile" \
cd197ffc	297	$platformo $tmp $object/wrapper.a
2bf11819 PM	298	rm $tmp
	299	fi
	300
a6afacb6 DG	301	# Some platforms need the zImage's entry point and base address
	302	base=0x`${CROSS}nm "$ofile" \| grep ' _start$' \| cut -d' ' -f1`
	303	entry=`${CROSS}objdump -f "$ofile" \| grep '^start address ' \| cut -d' ' -f3`
	304
11c146cc SW	305	if [ -n "$binary" ]; then
11c146cc SW	306	mv "$ofile" "$ofile".elf
aeb4552f	307	${CROSS}objcopy -O binary "$ofile".elf "$ofile"
11c146cc SW	308	fi
11c146cc SW	309
2bf11819 PM	310	# post-processing needed for some platforms
2bf11819 PM	311	case "$platform" in
5663a123 PM	312	pseries\|chrp)
5663a123 PM	313	$objbin/addnote "$ofile"
0dcd4401	314	;;
627aa944	315	coff)
cd197ffc	316	${CROSS}objcopy -O aixcoff-rs6000 --set-start "$entry" "$ofile"
5c539ee3	317	$objbin/hack-coff "$ofile"
2bf11819	318	;;
0fdd717e	319	cuboot*)
aeb4552f	320	gzip -f -9 "$ofile"
0fdd717e	321	mkimage -A ppc -O linux -T kernel -C gzip -a "$base" -e "$entry" \
aeb4552f	322	$uboot_version -d "$ofile".gz "$ofile"
0fdd717e	323	;;
f6dfc805 DG	324	treeboot*)
f6dfc805 DG	325	mv "$ofile" "$ofile.elf"
5c539ee3	326	$objbin/mktree "$ofile.elf" "$ofile" "$base" "$entry"
f6dfc805 DG	327	if [ -z "$cacheit" ]; then
	328	rm -f "$ofile.elf"
	329	fi
	330	exit 0
	331	;;
bafdb645	332	ps3)
5761eaa3 GL	333	# The ps3's loader supports loading a gzipped binary image from flash
	334	# rom to ram addr zero. The loader then enters the system reset
	335	# vector at addr 0x100. A bootwrapper overlay is used to arrange for
	336	# a binary image of the kernel to be at addr zero, and yet have a
	337	# suitable bootwrapper entry at 0x100. To construct the final rom
	338	# image 512 bytes from offset 0x100 is copied to the bootwrapper
	339	# place holder at symbol __system_reset_kernel. The 512 bytes of the
	340	# bootwrapper entry code at symbol __system_reset_overlay is then
	341	# copied to offset 0x100. At runtime the bootwrapper program copies
	342	# the data at __system_reset_kernel back to addr 0x100.
bafdb645	343
aeb4552f	344	system_reset_overlay=0x`${CROSS}nm "$ofile" \
bafdb645 GL	345	\| grep ' __system_reset_overlay$' \
	346	\| cut -d' ' -f1`
	347	system_reset_overlay=`printf "%d" $system_reset_overlay`
aeb4552f	348	system_reset_kernel=0x`${CROSS}nm "$ofile" \
bafdb645 GL	349	\| grep ' __system_reset_kernel$' \
	350	\| cut -d' ' -f1`
	351	system_reset_kernel=`printf "%d" $system_reset_kernel`
	352	overlay_dest="256"
5761eaa3	353	overlay_size="512"
bafdb645	354
aeb4552f SW	355	${CROSS}objcopy -O binary "$ofile" "$ofile.bin"
aeb4552f SW	356
d4740373 GL	357	dd if="$ofile.bin" of="$ofile.bin" conv=notrunc \
	358	skip=$overlay_dest seek=$system_reset_kernel \
	359	count=$overlay_size bs=1
bafdb645	360
d4740373 GL	361	dd if="$ofile.bin" of="$ofile.bin" conv=notrunc \
	362	skip=$system_reset_overlay seek=$overlay_dest \
	363	count=$overlay_size bs=1
bafdb645	364
928b9695 DW	365	odir="$(dirname "$ofile.bin")"
	366	rm -f "$odir/otheros.bld"
	367	gzip --force -9 --stdout "$ofile.bin" > "$odir/otheros.bld"
bafdb645	368	;;
2bf11819	369	esac