[linux-block.git] / arch / powerpc / boot / wrapper

#!/bin/sh
# SPDX-License-Identifier: GPL-2.0-only

# Copyright (C) 2006 Paul Mackerras, IBM Corporation <paulus@samba.org>

# 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)
# -e esm_blob   specify ESM blob for secure images
# -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 .)
# -z		use gzip (legacy)
# -Z zsuffix    compression to use (gz, xz or none)

# Stop execution if any command fails
set -e

export LC_ALL=C

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

# defaults
kernel=
ofile=zImage
platform=of
initrd=
dtb=
dts=
esm_blob=
cacheit=
binary=
compression=.gz
uboot_comp=gzip
pie=
format=
notext=
rodynamic=

# cross-compilation prefix
CROSS=

# mkimage wrapper script
MKIMAGE=$srctree/scripts/mkuboot.sh

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

# directory for working files
tmpdir=.

usage() {
    echo 'Usage: wrapper [-o output] [-p platform] [-i initrd]' >&2
    echo '       [-d devtree] [-s tree.dts] [-e esm_blob]' >&2
    echo '       [-c] [-C cross-prefix] [-D datadir] [-W workingdir]' >&2
    echo '       [-Z (gz|xz|none)] [--no-compression] [vmlinux]' >&2
    exit 1
}

run_cmd() {
    if [ "$V" = 1 ]; then
        $* 2>&1
    else
        local msg

        set +e
        msg=$($* 2>&1)

        if [ $? -ne "0" ]; then
                echo $msg
                exit 1
        fi
        set -e
    fi
}

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="$1"
	;;
    -e)
	shift
	[ "$#" -gt 0 ] || usage
	esm_blob="$1"
	;;
    -s)
	shift
	[ "$#" -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="$1"
	;;
    -z)
	compression=.gz
	uboot_comp=gzip
	;;
    -Z)
	shift
	[ "$#" -gt 0 ] || usage
        [ "$1" != "gz" -o "$1" != "xz" -o "$1" != "lzma" -o "$1" != "lzo" -o "$1" != "none" ] || usage

	compression=".$1"
	uboot_comp=$1

        if [ $compression = ".none" ]; then
                compression=
		uboot_comp=none
        fi
	if [ $uboot_comp = "gz" ]; then
		uboot_comp=gzip
	fi
	;;
    --no-gzip)
        # a "feature" of the wrapper script is that it can be used outside
        # the kernel tree. So keeping this around for backwards compatibility.
        compression=
	uboot_comp=none
        ;;
    -?)
	usage
	;;
    *)
	[ -z "$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
    $dtc -O dtb -o "$dtb" -b 0 "$dts"
fi

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

LC_ALL=C elfformat="`${CROSS}objdump -p "$kernel" | grep 'file format' | awk '{print $4}'`"
case "$elfformat" in
    elf64-powerpcle)	format=elf64lppc	;;
    elf64-powerpc)	format=elf32ppc	;;
    elf32-powerpc)	format=elf32ppc	;;
esac

ld_version()
{
    # Poached from scripts/ld-version.sh, but we don't want to call that because
    # this script (wrapper) is distributed separately from the kernel source.
    # Extract linker version number from stdin and turn into single number.
    awk '{
	gsub(".*\\)", "");
	gsub(".*version ", "");
	gsub("-.*", "");
	split($1,a, ".");
	if( length(a[3]) == "8" )
		# a[3] is probably a date of format yyyymmdd used for release snapshots. We
		# can assume it to be zero as it does not signify a new version as such.
		a[3] = 0;
	print a[1]*100000000 + a[2]*1000000 + a[3]*10000;
	exit
    }'
}

ld_is_lld()
{
	${CROSS}ld -V 2>&1 | grep -q LLD
}

# Do not include PT_INTERP segment when linking pie. Non-pie linking
# just ignores this option.
LD_VERSION=$(${CROSS}ld --version | ld_version)
LD_NO_DL_MIN_VERSION=$(echo 2.26 | ld_version)
if [ "$LD_VERSION" -ge "$LD_NO_DL_MIN_VERSION" ] ; then
	nodl="--no-dynamic-linker"
fi

# suppress some warnings in recent ld versions
nowarn="-z noexecstack"
if "${CROSS}ld" -v --no-warn-rwx-segments >/dev/null 2>&1; then
	nowarn="$nowarn --no-warn-rwx-segments"
fi

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


if [ -n "$esm_blob" -a "$platform" != "pseries" ]; then
    echo "ESM blob not support on non-pseries platforms" >&2
    exit 1
fi

case "$platform" in
of)
    platformo="$object/of.o $object/epapr.o"
    make_space=n
    ;;
pseries)
    platformo="$object/pseries-head.o $object/of.o $object/epapr.o"
    link_address='0x4000000'
    if [ "$format" != "elf32ppc" ]; then
	link_address=
	pie=-pie
    fi
    make_space=n
    ;;
pmac|chrp)
    platformo="$object/of.o $object/epapr.o"
    make_space=n
    ;;
coff)
    platformo="$object/crt0.o $object/of.o $object/epapr.o"
    lds=$object/zImage.coff.lds
    link_address='0x500000'
    make_space=n
    pie=
    ;;
miboot|uboot*)
    # miboot and U-boot want just the bare bits, not an ELF binary
    ext=bin
    objflags="-O binary"
    tmp="$ofile"
    ksection=image
    isection=initrd
    ;;
cuboot*)
    binary=y
    compression=
    case "$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*)
        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
    compression=
    ext=bin
    objflags="-O binary --set-section-flags=.bss=contents,alloc,load,data"
    ksection=.kernel:vmlinux.bin
    isection=.kernel:initrd
    link_address=''
    make_space=n
    pie=
    ;;
ep88xc|ep8248e)
    platformo="$object/fixed-head.o $object/$platform.o"
    binary=y
    ;;
adder875-redboot)
    platformo="$object/fixed-head.o $object/redboot-8xx.o"
    binary=y
    ;;
simpleboot-*)
    platformo="$object/fixed-head.o $object/simpleboot.o"
    binary=y
    ;;
asp834x-redboot)
    platformo="$object/fixed-head.o $object/redboot-83xx.o"
    binary=y
    ;;
xpedite52*)
    link_address='0x1400000'
    platformo=$object/cuboot-85xx.o
    ;;
gamecube|wii)
    link_address='0x600000'
    platformo="$object/$platform-head.o $object/$platform.o"
    ;;
microwatt)
    link_address='0x500000'
    platformo="$object/fixed-head.o $object/$platform.o"
    binary=y
    ;;
treeboot-currituck)
    link_address='0x1000000'
    ;;
treeboot-akebono)
    link_address='0x1000000'
    ;;
treeboot-iss4xx-mpic)
    platformo="$object/treeboot-iss4xx.o"
    ;;
epapr)
    platformo="$object/pseries-head.o $object/epapr.o $object/epapr-wrapper.o"
    link_address='0x20000000'
    pie=-pie
    notext='-z notext'
    rodynamic=$(if ${CROSS}ld -V 2>&1 | grep -q LLD ; then echo "-z rodynamic"; fi)
    ;;
mvme5100)
    platformo="$object/fixed-head.o $object/mvme5100.o"
    binary=y
    ;;
mvme7100)
    platformo="$object/motload-head.o $object/mvme7100.o"
    link_address='0x4000000'
    binary=y
    ;;
esac

vmz="$tmpdir/`basename \"$kernel\"`.$ext"

# Calculate the vmlinux.strip size
${CROSS}objcopy $objflags "$kernel" "$vmz.$$"
strip_size=$(${CONFIG_SHELL} "${srctree}/scripts/file-size.sh" "$vmz.$$")

if [ -z "$cacheit" -o ! -f "$vmz$compression" -o "$vmz$compression" -ot "$kernel" ]; then
    # recompress the image if we need to
    case $compression in
    .xz)
        xz --check=crc32 -f -6 "$vmz.$$"
        ;;
    .gz)
        gzip -n -f -9 "$vmz.$$"
        ;;
    .lzma)
        xz --format=lzma -f -6 "$vmz.$$"
	;;
    .lzo)
        lzop -f -9 "$vmz.$$"
	;;
    *)
        # drop the compression suffix so the stripped vmlinux is used
        compression=
	uboot_comp=none
	;;
    esac

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

vmz="$vmz$compression"

if [ "$make_space" = "y" ]; then
	# Round the size to next higher MB limit
	round_size=$(((strip_size + 0xfffff) & 0xfff00000))

	round_size=0x$(printf "%x" $round_size)
	link_addr=$(printf "%d" $link_address)

	if [ $link_addr -lt $strip_size ]; then
	    echo "INFO: Uncompressed kernel (size 0x$(printf "%x\n" $strip_size))" \
			"overlaps the address of the wrapper($link_address)"
	    echo "INFO: Fixing the link_address of wrapper to ($round_size)"
	    link_address=$round_size
	fi
fi

# Extract kernel version information, some platforms want to include
# it in the image header
version=`${CROSS}strings "$kernel" | grep '^Linux version [-0-9.]' | \
    head -n1 | 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 $uboot_comp -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 [ -n "$esm_blob" ]; then
    addsec $tmp "$esm_blob" $esection
fi

if [ "$platform" != "miboot" ]; then
    if [ -n "$link_address" ] ; then
        text_start="-Ttext $link_address"
    fi
#link everything
    ${CROSS}ld -m $format -T $lds $text_start $pie $nodl $nowarn $rodynamic $notext -o "$ofile" $map \
	$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 -n -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"

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

    run_cmd 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")"

    # The ps3's flash loader has a size limit of 16 MiB for the uncompressed
    # image.  If a compressed image that exceeded this limit is written to
    # flash the loader will decompress that image until the 16 MiB limit is
    # reached, then enter the system reset vector of the partially decompressed
    # image.  No warning is issued.
    rm -f "$odir"/{otheros,otheros-too-big}.bld
    size=$(${CROSS}nm --no-sort --radix=d "$ofile" | grep -E ' _end$' | cut -d' ' -f1)
    bld="otheros.bld"
    if [ $size -gt $((0x1000000)) ]; then
        bld="otheros-too-big.bld"
    fi
    gzip -n --force -9 --stdout "$ofile.bin" > "$odir/$bld"
    ;;
esac
Commit	Line	Data
	1	#!/bin/sh
	2	# SPDX-License-Identifier: GPL-2.0-only
	3
	4	# Copyright (C) 2006 Paul Mackerras, IBM Corporation <paulus@samba.org>
	5
	6	# This script takes a kernel binary and optionally an initrd image
	7	# and/or a device-tree blob, and creates a bootable zImage for a
	8	# given platform.
	9
	10	# Options:
	11	# -o zImage specify output file
	12	# -p platform specify platform (links in $platform.o)
	13	# -i initrd specify initrd file
	14	# -d devtree specify device-tree blob
	15	# -s tree.dts specify device-tree source file (needs dtc installed)
	16	# -e esm_blob specify ESM blob for secure images
	17	# -c cache $kernel.strip.gz (use if present & newer, else make)
	18	# -C prefix specify command prefix for cross-building tools
	19	# (strip, objcopy, ld)
	20	# -D dir specify directory containing data files used by script
	21	# (default ./arch/powerpc/boot)
	22	# -W dir specify working directory for temporary files (default .)
	23	# -z use gzip (legacy)
	24	# -Z zsuffix compression to use (gz, xz or none)
	25
	26	# Stop execution if any command fails
	27	set -e
	28
	29	export LC_ALL=C
	30
	31	# Allow for verbose output
	32	if [ "$V" = 1 ]; then
	33	set -x
	34	map="-Map wrapper.map"
	35	fi
	36
	37	# defaults
	38	kernel=
	39	ofile=zImage
	40	platform=of
	41	initrd=
	42	dtb=
	43	dts=
	44	esm_blob=
	45	cacheit=
	46	binary=
	47	compression=.gz
	48	uboot_comp=gzip
	49	pie=
	50	format=
	51	notext=
	52	rodynamic=
	53
	54	# cross-compilation prefix
	55	CROSS=
	56
	57	# mkimage wrapper script
	58	MKIMAGE=$srctree/scripts/mkuboot.sh
	59
	60	# directory for object and other files used by this script
	61	object=arch/powerpc/boot
	62	objbin=$object
	63	dtc=scripts/dtc/dtc
	64
	65	# directory for working files
	66	tmpdir=.
	67
	68	usage() {
	69	echo 'Usage: wrapper [-o output] [-p platform] [-i initrd]' >&2
	70	echo ' [-d devtree] [-s tree.dts] [-e esm_blob]' >&2
	71	echo ' [-c] [-C cross-prefix] [-D datadir] [-W workingdir]' >&2
	72	echo ' [-Z (gz\|xz\|none)] [--no-compression] [vmlinux]' >&2
	73	exit 1
	74	}
	75
	76	run_cmd() {
	77	if [ "$V" = 1 ]; then
	78	$* 2>&1
	79	else
	80	local msg
	81
	82	set +e
	83	msg=$($* 2>&1)
	84
	85	if [ $? -ne "0" ]; then
	86	echo $msg
	87	exit 1
	88	fi
	89	set -e
	90	fi
	91	}
	92
	93	while [ "$#" -gt 0 ]; do
	94	case "$1" in
	95	-o)
	96	shift
	97	[ "$#" -gt 0 ] \|\| usage
	98	ofile="$1"
	99	;;
	100	-p)
	101	shift
	102	[ "$#" -gt 0 ] \|\| usage
	103	platform="$1"
	104	;;
	105	-i)
	106	shift
	107	[ "$#" -gt 0 ] \|\| usage
	108	initrd="$1"
	109	;;
	110	-d)
	111	shift
	112	[ "$#" -gt 0 ] \|\| usage
	113	dtb="$1"
	114	;;
	115	-e)
	116	shift
	117	[ "$#" -gt 0 ] \|\| usage
	118	esm_blob="$1"
	119	;;
	120	-s)
	121	shift
	122	[ "$#" -gt 0 ] \|\| usage
	123	dts="$1"
	124	;;
	125	-c)
	126	cacheit=y
	127	;;
	128	-C)
	129	shift
	130	[ "$#" -gt 0 ] \|\| usage
	131	CROSS="$1"
	132	;;
	133	-D)
	134	shift
	135	[ "$#" -gt 0 ] \|\| usage
	136	object="$1"
	137	objbin="$1"
	138	;;
	139	-W)
	140	shift
	141	[ "$#" -gt 0 ] \|\| usage
	142	tmpdir="$1"
	143	;;
	144	-z)
	145	compression=.gz
	146	uboot_comp=gzip
	147	;;
	148	-Z)
	149	shift
	150	[ "$#" -gt 0 ] \|\| usage
	151	[ "$1" != "gz" -o "$1" != "xz" -o "$1" != "lzma" -o "$1" != "lzo" -o "$1" != "none" ] \|\| usage
	152
	153	compression=".$1"
	154	uboot_comp=$1
	155
	156	if [ $compression = ".none" ]; then
	157	compression=
	158	uboot_comp=none
	159	fi
	160	if [ $uboot_comp = "gz" ]; then
	161	uboot_comp=gzip
	162	fi
	163	;;
	164	--no-gzip)
	165	# a "feature" of the wrapper script is that it can be used outside
	166	# the kernel tree. So keeping this around for backwards compatibility.
	167	compression=
	168	uboot_comp=none
	169	;;
	170	-?)
	171	usage
	172	;;
	173	*)
	174	[ -z "$kernel" ] \|\| usage
	175	kernel="$1"
	176	;;
	177	esac
	178	shift
	179	done
	180
	181
	182	if [ -n "$dts" ]; then
	183	if [ ! -r "$dts" -a -r "$object/dts/$dts" ]; then
	184	dts="$object/dts/$dts"
	185	fi
	186	if [ -z "$dtb" ]; then
	187	dtb="$platform.dtb"
	188	fi
	189	$dtc -O dtb -o "$dtb" -b 0 "$dts"
	190	fi
	191
	192	if [ -z "$kernel" ]; then
	193	kernel=vmlinux
	194	fi
	195
	196	LC_ALL=C elfformat="`${CROSS}objdump -p "$kernel" \| grep 'file format' \| awk '{print $4}'`"
	197	case "$elfformat" in
	198	elf64-powerpcle) format=elf64lppc ;;
	199	elf64-powerpc) format=elf32ppc ;;
	200	elf32-powerpc) format=elf32ppc ;;
	201	esac
	202
	203	ld_version()
	204	{
	205	# Poached from scripts/ld-version.sh, but we don't want to call that because
	206	# this script (wrapper) is distributed separately from the kernel source.
	207	# Extract linker version number from stdin and turn into single number.
	208	awk '{
	209	gsub(".*\\)", "");
	210	gsub(".*version ", "");
	211	gsub("-.*", "");
	212	split($1,a, ".");
	213	if( length(a[3]) == "8" )
	214	# a[3] is probably a date of format yyyymmdd used for release snapshots. We
	215	# can assume it to be zero as it does not signify a new version as such.
	216	a[3] = 0;
	217	print a[1]100000000 + a[2]1000000 + a[3]*10000;
	218	exit
	219	}'
	220	}
	221
	222	ld_is_lld()
	223	{
	224	${CROSS}ld -V 2>&1 \| grep -q LLD
	225	}
	226
	227	# Do not include PT_INTERP segment when linking pie. Non-pie linking
	228	# just ignores this option.
	229	LD_VERSION=$(${CROSS}ld --version \| ld_version)
	230	LD_NO_DL_MIN_VERSION=$(echo 2.26 \| ld_version)
	231	if [ "$LD_VERSION" -ge "$LD_NO_DL_MIN_VERSION" ] ; then
	232	nodl="--no-dynamic-linker"
	233	fi
	234
	235	# suppress some warnings in recent ld versions
	236	nowarn="-z noexecstack"
	237	if "${CROSS}ld" -v --no-warn-rwx-segments >/dev/null 2>&1; then
	238	nowarn="$nowarn --no-warn-rwx-segments"
	239	fi
	240
	241	platformo=$object/"$platform".o
	242	lds=$object/zImage.lds
	243	ext=strip
	244	objflags=-S
	245	tmp=$tmpdir/zImage.$$.o
	246	ksection=.kernel:vmlinux.strip
	247	isection=.kernel:initrd
	248	esection=.kernel:esm_blob
	249	link_address='0x400000'
	250	make_space=y
	251
	252
	253	if [ -n "$esm_blob" -a "$platform" != "pseries" ]; then
	254	echo "ESM blob not support on non-pseries platforms" >&2
	255	exit 1
	256	fi
	257
	258	case "$platform" in
	259	of)
	260	platformo="$object/of.o $object/epapr.o"
	261	make_space=n
	262	;;
	263	pseries)
	264	platformo="$object/pseries-head.o $object/of.o $object/epapr.o"
	265	link_address='0x4000000'
	266	if [ "$format" != "elf32ppc" ]; then
	267	link_address=
	268	pie=-pie
	269	fi
	270	make_space=n
	271	;;
	272	pmac\|chrp)
	273	platformo="$object/of.o $object/epapr.o"
	274	make_space=n
	275	;;
	276	coff)
	277	platformo="$object/crt0.o $object/of.o $object/epapr.o"
	278	lds=$object/zImage.coff.lds
	279	link_address='0x500000'
	280	make_space=n
	281	pie=
	282	;;
	283	miboot\|uboot*)
	284	# miboot and U-boot want just the bare bits, not an ELF binary
	285	ext=bin
	286	objflags="-O binary"
	287	tmp="$ofile"
	288	ksection=image
	289	isection=initrd
	290	;;
	291	cuboot*)
	292	binary=y
	293	compression=
	294	case "$platform" in
	295	-mpc866ads\|-mpc885ads\|-adder875\|*-ep88xc)
	296	platformo=$object/cuboot-8xx.o
	297	;;
	298	5200\|*-motionpro)
	299	platformo=$object/cuboot-52xx.o
	300	;;
	301	-pq2fads\|-ep8248e\|-mpc8272\|*-storcenter)
	302	platformo=$object/cuboot-pq2.o
	303	;;
	304	-mpc824)
	305	platformo=$object/cuboot-824x.o
	306	;;
	307	-mpc83\|-asp834x)
	308	platformo=$object/cuboot-83xx.o
	309	;;
	310	-tqm8541\|-mpc8560\|-tqm8560\|-tqm8555\|-ksi8560*)
	311	platformo=$object/cuboot-85xx-cpm2.o
	312	;;
	313	-mpc85\|-tqm85)
	314	platformo=$object/cuboot-85xx.o
	315	;;
	316	*-amigaone)
	317	link_address='0x800000'
	318	;;
	319	esac
	320	;;
	321	ps3)
	322	platformo="$object/ps3-head.o $object/ps3-hvcall.o $object/ps3.o"
	323	lds=$object/zImage.ps3.lds
	324	compression=
	325	ext=bin
	326	objflags="-O binary --set-section-flags=.bss=contents,alloc,load,data"
	327	ksection=.kernel:vmlinux.bin
	328	isection=.kernel:initrd
	329	link_address=''
	330	make_space=n
	331	pie=
	332	;;
	333	ep88xc\|ep8248e)
	334	platformo="$object/fixed-head.o $object/$platform.o"
	335	binary=y
	336	;;
	337	adder875-redboot)
	338	platformo="$object/fixed-head.o $object/redboot-8xx.o"
	339	binary=y
	340	;;
	341	simpleboot-*)
	342	platformo="$object/fixed-head.o $object/simpleboot.o"
	343	binary=y
	344	;;
	345	asp834x-redboot)
	346	platformo="$object/fixed-head.o $object/redboot-83xx.o"
	347	binary=y
	348	;;
	349	xpedite52*)
	350	link_address='0x1400000'
	351	platformo=$object/cuboot-85xx.o
	352	;;
	353	gamecube\|wii)
	354	link_address='0x600000'
	355	platformo="$object/$platform-head.o $object/$platform.o"
	356	;;
	357	microwatt)
	358	link_address='0x500000'
	359	platformo="$object/fixed-head.o $object/$platform.o"
	360	binary=y
	361	;;
	362	treeboot-currituck)
	363	link_address='0x1000000'
	364	;;
	365	treeboot-akebono)
	366	link_address='0x1000000'
	367	;;
	368	treeboot-iss4xx-mpic)
	369	platformo="$object/treeboot-iss4xx.o"
	370	;;
	371	epapr)
	372	platformo="$object/pseries-head.o $object/epapr.o $object/epapr-wrapper.o"
	373	link_address='0x20000000'
	374	pie=-pie
	375	notext='-z notext'
	376	rodynamic=$(if ${CROSS}ld -V 2>&1 \| grep -q LLD ; then echo "-z rodynamic"; fi)
	377	;;
	378	mvme5100)
	379	platformo="$object/fixed-head.o $object/mvme5100.o"
	380	binary=y
	381	;;
	382	mvme7100)
	383	platformo="$object/motload-head.o $object/mvme7100.o"
	384	link_address='0x4000000'
	385	binary=y
	386	;;
	387	esac
	388
	389	vmz="$tmpdir/`basename \"$kernel\"`.$ext"
	390
	391	# Calculate the vmlinux.strip size
	392	${CROSS}objcopy $objflags "$kernel" "$vmz.$$"
	393	strip_size=$(${CONFIG_SHELL} "${srctree}/scripts/file-size.sh" "$vmz.$$")
	394
	395	if [ -z "$cacheit" -o ! -f "$vmz$compression" -o "$vmz$compression" -ot "$kernel" ]; then
	396	# recompress the image if we need to
	397	case $compression in
	398	.xz)
	399	xz --check=crc32 -f -6 "$vmz.$$"
	400	;;
	401	.gz)
	402	gzip -n -f -9 "$vmz.$$"
	403	;;
	404	.lzma)
	405	xz --format=lzma -f -6 "$vmz.$$"
	406	;;
	407	.lzo)
	408	lzop -f -9 "$vmz.$$"
	409	;;
	410	*)
	411	# drop the compression suffix so the stripped vmlinux is used
	412	compression=
	413	uboot_comp=none
	414	;;
	415	esac
	416
	417	if [ -n "$cacheit" ]; then
	418	mv -f "$vmz.$$$compression" "$vmz$compression"
	419	else
	420	vmz="$vmz.$$"
	421	fi
	422	else
	423	rm -f $vmz.$$
	424	fi
	425
	426	vmz="$vmz$compression"
	427
	428	if [ "$make_space" = "y" ]; then
	429	# Round the size to next higher MB limit
	430	round_size=$(((strip_size + 0xfffff) & 0xfff00000))
	431
	432	round_size=0x$(printf "%x" $round_size)
	433	link_addr=$(printf "%d" $link_address)
	434
	435	if [ $link_addr -lt $strip_size ]; then
	436	echo "INFO: Uncompressed kernel (size 0x$(printf "%x\n" $strip_size))" \
	437	"overlaps the address of the wrapper($link_address)"
	438	echo "INFO: Fixing the link_address of wrapper to ($round_size)"
	439	link_address=$round_size
	440	fi
	441	fi
	442
	443	# Extract kernel version information, some platforms want to include
	444	# it in the image header
	445	version=`${CROSS}strings "$kernel" \| grep '^Linux version [-0-9.]' \| \
	446	head -n1 \| cut -d' ' -f3`
	447	if [ -n "$version" ]; then
	448	uboot_version="-n Linux-$version"
	449	fi
	450
	451	# physical offset of kernel image
	452	membase=`${CROSS}objdump -p "$kernel" \| grep -m 1 LOAD \| awk '{print $7}'`
	453
	454	case "$platform" in
	455	uboot)
	456	rm -f "$ofile"
	457	${MKIMAGE} -A ppc -O linux -T kernel -C $uboot_comp -a $membase -e $membase \
	458	$uboot_version -d "$vmz" "$ofile"
	459	if [ -z "$cacheit" ]; then
	460	rm -f "$vmz"
	461	fi
	462	exit 0
	463	;;
	464	esac
	465
	466	addsec() {
	467	${CROSS}objcopy $4 $1 \
	468	--add-section=$3="$2" \
	469	--set-section-flags=$3=contents,alloc,load,readonly,data
	470	}
	471
	472	addsec $tmp "$vmz" $ksection $object/empty.o
	473	if [ -z "$cacheit" ]; then
	474	rm -f "$vmz"
	475	fi
	476
	477	if [ -n "$initrd" ]; then
	478	addsec $tmp "$initrd" $isection
	479	fi
	480
	481	if [ -n "$dtb" ]; then
	482	addsec $tmp "$dtb" .kernel:dtb
	483	if [ -n "$dts" ]; then
	484	rm $dtb
	485	fi
	486	fi
	487
	488	if [ -n "$esm_blob" ]; then
	489	addsec $tmp "$esm_blob" $esection
	490	fi
	491
	492	if [ "$platform" != "miboot" ]; then
	493	if [ -n "$link_address" ] ; then
	494	text_start="-Ttext $link_address"
	495	fi
	496	#link everything
	497	${CROSS}ld -m $format -T $lds $text_start $pie $nodl $nowarn $rodynamic $notext -o "$ofile" $map \
	498	$platformo $tmp $object/wrapper.a
	499	rm $tmp
	500	fi
	501
	502	# Some platforms need the zImage's entry point and base address
	503	base=0x`${CROSS}nm "$ofile" \| grep ' _start$' \| cut -d' ' -f1`
	504	entry=`${CROSS}objdump -f "$ofile" \| grep '^start address ' \| cut -d' ' -f3`
	505
	506	if [ -n "$binary" ]; then
	507	mv "$ofile" "$ofile".elf
	508	${CROSS}objcopy -O binary "$ofile".elf "$ofile"
	509	fi
	510
	511	# post-processing needed for some platforms
	512	case "$platform" in
	513	pseries\|chrp)
	514	$objbin/addnote "$ofile"
	515	;;
	516	coff)
	517	${CROSS}objcopy -O aixcoff-rs6000 --set-start "$entry" "$ofile"
	518	$objbin/hack-coff "$ofile"
	519	;;
	520	cuboot*)
	521	gzip -n -f -9 "$ofile"
	522	${MKIMAGE} -A ppc -O linux -T kernel -C gzip -a "$base" -e "$entry" \
	523	$uboot_version -d "$ofile".gz "$ofile"
	524	;;
	525	treeboot*)
	526	mv "$ofile" "$ofile.elf"
	527	$objbin/mktree "$ofile.elf" "$ofile" "$base" "$entry"
	528	if [ -z "$cacheit" ]; then
	529	rm -f "$ofile.elf"
	530	fi
	531	exit 0
	532	;;
	533	ps3)
	534	# The ps3's loader supports loading a gzipped binary image from flash
	535	# rom to ram addr zero. The loader then enters the system reset
	536	# vector at addr 0x100. A bootwrapper overlay is used to arrange for
	537	# a binary image of the kernel to be at addr zero, and yet have a
	538	# suitable bootwrapper entry at 0x100. To construct the final rom
	539	# image 512 bytes from offset 0x100 is copied to the bootwrapper
	540	# place holder at symbol __system_reset_kernel. The 512 bytes of the
	541	# bootwrapper entry code at symbol __system_reset_overlay is then
	542	# copied to offset 0x100. At runtime the bootwrapper program copies
	543	# the data at __system_reset_kernel back to addr 0x100.
	544
	545	system_reset_overlay=0x`${CROSS}nm "$ofile" \
	546	\| grep ' __system_reset_overlay$' \
	547	\| cut -d' ' -f1`
	548	system_reset_overlay=`printf "%d" $system_reset_overlay`
	549	system_reset_kernel=0x`${CROSS}nm "$ofile" \
	550	\| grep ' __system_reset_kernel$' \
	551	\| cut -d' ' -f1`
	552	system_reset_kernel=`printf "%d" $system_reset_kernel`
	553	overlay_dest="256"
	554	overlay_size="512"
	555
	556	${CROSS}objcopy -O binary "$ofile" "$ofile.bin"
	557
	558	run_cmd dd if="$ofile.bin" of="$ofile.bin" conv=notrunc \
	559	skip=$overlay_dest seek=$system_reset_kernel \
	560	count=$overlay_size bs=1
	561
	562	run_cmd dd if="$ofile.bin" of="$ofile.bin" conv=notrunc \
	563	skip=$system_reset_overlay seek=$overlay_dest \
	564	count=$overlay_size bs=1
	565
	566	odir="$(dirname "$ofile.bin")"
	567
	568	# The ps3's flash loader has a size limit of 16 MiB for the uncompressed
	569	# image. If a compressed image that exceeded this limit is written to
	570	# flash the loader will decompress that image until the 16 MiB limit is
	571	# reached, then enter the system reset vector of the partially decompressed
	572	# image. No warning is issued.
	573	rm -f "$odir"/{otheros,otheros-too-big}.bld
	574	size=$(${CROSS}nm --no-sort --radix=d "$ofile" \| grep -E ' _end$' \| cut -d' ' -f1)
	575	bld="otheros.bld"
	576	if [ $size -gt $((0x1000000)) ]; then
	577	bld="otheros-too-big.bld"
	578	fi
	579	gzip -n --force -9 --stdout "$ofile.bin" > "$odir/$bld"
	580	;;
	581	esac