xref: /linux/arch/powerpc/boot/wrapper (revision bba2c3615bd6cfee7456d1130f2e6b01b3f4e9ba) 
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 $kernel.strip.gz (use if present & newer, else make)
18# -C prefix	specify command prefix for cross-building tools
19#		(strip, objcopy, ld)
20# -D dir	specify directory containing data files used by script
21#		(default ./arch/powerpc/boot)
22# -W dir	specify working directory for temporary files (default .)
23# -z		use gzip (legacy)
24# -Z zsuffix    compression to use (gz, xz, lzma, lzo or none)
25
26# Stop execution if any command fails
27set -e
28
29export LC_ALL=C
30
31# Allow for verbose output
32if [ "$V" = 1 ]; then
33    set -x
34    map="-Map wrapper.map"
35fi
36
37# defaults
38kernel=
39ofile=zImage
40platform=of
41initrd=
42dtb=
43dts=
44esm_blob=
45cacheit=
46binary=
47compression=.gz
48uboot_comp=gzip
49pie=
50format=
51notext=
52rodynamic=
53
54# cross-compilation prefix
55CROSS=
56
57# mkimage wrapper script
58MKIMAGE=$srctree/scripts/mkuboot.sh
59
60# directory for object and other files used by this script
61object=arch/powerpc/boot
62objbin=$object
63dtc=scripts/dtc/dtc
64
65# directory for working files
66tmpdir=.
67
68usage() {
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|lzma|lzo|none)] [--no-compression] [vmlinux]' >&2
73    exit 1
74}
75
76run_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 $msg
87                exit 1
88        fi
89        set -e
90    fi
91}
92
93while [ "$#" -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="$1"
176	;;
177    esac
178    shift
179done
180
181
182if [ -n "$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 "$dts"
190fi
191
192if [ -z "$kernel" ]; then
193    kernel=vmlinux
194fi
195
196LC_ALL=C elfformat="`${CROSS}objdump -p "$kernel" | grep 'file format' | awk '{print $4}'`"
197case "$elfformat" in
198    elf64-powerpcle)	format=elf64lppc	;;
199    elf64-powerpc)	format=elf32ppc	;;
200    elf32-powerpc)	format=elf32ppc	;;
201esac
202
203ld_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
222ld_is_lld()
223{
224	${CROSS}ld -V 2>&1 | grep -q LLD
225}
226
227# Do not include PT_INTERP segment when linking pie. Non-pie linking
228# just ignores this option.
229nodl="--no-dynamic-linker"
230
231# suppress some warnings in recent ld versions
232nowarn="-z noexecstack"
233if "${CROSS}ld" -v --no-warn-rwx-segments >/dev/null 2>&1; then
234	nowarn="$nowarn --no-warn-rwx-segments"
235fi
236
237platformo=$object/"$platform".o
238lds=$object/zImage.lds
239ext=strip
240objflags=-S
241tmp=$tmpdir/zImage.$$.o
242ksection=.kernel:vmlinux.strip
243isection=.kernel:initrd
244esection=.kernel:esm_blob
245link_address='0x400000'
246make_space=y
247
248
249if [ -n "$esm_blob" -a "$platform" != "pseries" ]; then
250    echo "ESM blob not support on non-pseries platforms" >&2
251    exit 1
252fi
253
254case "$platform" in
255of)
256    platformo="$object/of.o $object/epapr.o"
257    make_space=n
258    ;;
259pseries)
260    platformo="$object/pseries-head.o $object/of.o $object/epapr.o"
261    link_address='0x4000000'
262    if [ "$format" != "elf32ppc" ]; then
263	link_address=
264	pie=-pie
265	notext='-z notext'
266    fi
267    make_space=n
268    ;;
269pmac|chrp)
270    platformo="$object/of.o $object/epapr.o"
271    make_space=n
272    ;;
273coff)
274    platformo="$object/crt0.o $object/of.o $object/epapr.o"
275    lds=$object/zImage.coff.lds
276    link_address='0x500000'
277    make_space=n
278    pie=
279    ;;
280miboot|uboot*)
281    # miboot and U-boot want just the bare bits, not an ELF binary
282    ext=bin
283    objflags="-O binary"
284    tmp="$ofile"
285    ksection=image
286    isection=initrd
287    ;;
288cuboot*)
289    binary=y
290    compression=
291    case "$platform" in
292    *-mpc866ads|*-mpc885ads|*-adder875*|*-ep88xc)
293        platformo=$object/cuboot-8xx.o
294        ;;
295    *5200*|*-motionpro)
296        platformo=$object/cuboot-52xx.o
297        ;;
298    *-pq2fads|*-ep8248e|*-mpc8272*|*-storcenter)
299        platformo=$object/cuboot-pq2.o
300        ;;
301    *-mpc824*)
302        platformo=$object/cuboot-824x.o
303        ;;
304    *-mpc83*|*-asp834x*)
305        platformo=$object/cuboot-83xx.o
306        ;;
307    *-tqm8541|*-mpc8560*|*-tqm8560|*-tqm8555|*-ksi8560*)
308        platformo=$object/cuboot-85xx-cpm2.o
309        ;;
310    *-mpc85*|*-tqm85*)
311        platformo=$object/cuboot-85xx.o
312        ;;
313    *-amigaone)
314        link_address='0x800000'
315        ;;
316    esac
317    ;;
318ps3)
319    platformo="$object/ps3-head.o $object/ps3-hvcall.o $object/ps3.o"
320    lds=$object/zImage.ps3.lds
321    compression=
322    ext=bin
323    objflags="-O binary --set-section-flags=.bss=contents,alloc,load,data"
324    ksection=.kernel:vmlinux.bin
325    isection=.kernel:initrd
326    link_address=''
327    make_space=n
328    pie=
329    ;;
330ep88xc|ep8248e)
331    platformo="$object/fixed-head.o $object/$platform.o"
332    binary=y
333    ;;
334adder875-redboot)
335    platformo="$object/fixed-head.o $object/redboot-8xx.o"
336    binary=y
337    ;;
338simpleboot-*)
339    platformo="$object/fixed-head.o $object/simpleboot.o"
340    binary=y
341    ;;
342asp834x-redboot)
343    platformo="$object/fixed-head.o $object/redboot-83xx.o"
344    binary=y
345    ;;
346xpedite52*)
347    link_address='0x1400000'
348    platformo=$object/cuboot-85xx.o
349    ;;
350gamecube|wii)
351    link_address='0x600000'
352    platformo="$object/$platform-head.o $object/$platform.o"
353    ;;
354microwatt)
355    link_address='0x500000'
356    platformo="$object/fixed-head.o $object/$platform.o"
357    binary=y
358    ;;
359treeboot-currituck)
360    link_address='0x1000000'
361    ;;
362treeboot-akebono)
363    link_address='0x1000000'
364    ;;
365treeboot-iss4xx-mpic)
366    platformo="$object/treeboot-iss4xx.o"
367    ;;
368epapr)
369    platformo="$object/pseries-head.o $object/epapr.o $object/epapr-wrapper.o"
370    link_address='0x20000000'
371    pie=-pie
372    notext='-z notext'
373    rodynamic=$(if ${CROSS}ld -V 2>&1 | grep -q LLD ; then echo "-z rodynamic"; fi)
374    ;;
375mvme5100)
376    platformo="$object/fixed-head.o $object/mvme5100.o"
377    binary=y
378    ;;
379mvme7100)
380    platformo="$object/motload-head.o $object/mvme7100.o"
381    link_address='0x4000000'
382    binary=y
383    ;;
384esac
385
386vmz="$tmpdir/`basename \"$kernel\"`.$ext"
387
388# Calculate the vmlinux.strip size
389${CROSS}objcopy $objflags "$kernel" "$vmz.$$"
390strip_size=$(${CONFIG_SHELL} "${srctree}/scripts/file-size.sh" "$vmz.$$")
391
392if [ -z "$cacheit" -o ! -f "$vmz$compression" -o "$vmz$compression" -ot "$kernel" ]; then
393    # recompress the image if we need to
394    case $compression in
395    .xz)
396        xz --check=crc32 -f -6 "$vmz.$$"
397        ;;
398    .gz)
399        gzip -n -f -9 "$vmz.$$"
400        ;;
401    .lzma)
402        xz --format=lzma -f -6 "$vmz.$$"
403	;;
404    .lzo)
405        lzop -f -9 "$vmz.$$"
406	;;
407    *)
408        # drop the compression suffix so the stripped vmlinux is used
409        compression=
410	uboot_comp=none
411	;;
412    esac
413
414    if [ -n "$cacheit" ]; then
415	mv -f "$vmz.$$$compression" "$vmz$compression"
416    else
417	vmz="$vmz.$$"
418    fi
419else
420    rm -f $vmz.$$
421fi
422
423vmz="$vmz$compression"
424
425if [ "$make_space" = "y" ]; then
426	# Round the size to next higher MB limit
427	round_size=$(((strip_size + 0xfffff) & 0xfff00000))
428
429	round_size=0x$(printf "%x" $round_size)
430	link_addr=$(printf "%d" $link_address)
431
432	if [ $link_addr -lt $strip_size ]; then
433	    echo "INFO: Uncompressed kernel (size 0x$(printf "%x\n" $strip_size))" \
434			"overlaps the address of the wrapper($link_address)"
435	    echo "INFO: Fixing the link_address of wrapper to ($round_size)"
436	    link_address=$round_size
437	fi
438fi
439
440# Extract kernel version information, some platforms want to include
441# it in the image header
442version=`${CROSS}strings "$kernel" | grep '^Linux version [-0-9.]' | \
443    head -n1 | cut -d' ' -f3`
444if [ -n "$version" ]; then
445    uboot_version="-n Linux-$version"
446fi
447
448# physical offset of kernel image
449membase=`${CROSS}objdump -p "$kernel" | grep -m 1 LOAD | awk '{print $7}'`
450
451case "$platform" in
452uboot)
453    rm -f "$ofile"
454    ${MKIMAGE} -A ppc -O linux -T kernel -C $uboot_comp -a $membase -e $membase \
455	$uboot_version -d "$vmz" "$ofile"
456    if [ -z "$cacheit" ]; then
457	rm -f "$vmz"
458    fi
459    exit 0
460    ;;
461esac
462
463addsec() {
464    ${CROSS}objcopy $4 $1 \
465	--add-section=$3="$2" \
466	--set-section-flags=$3=contents,alloc,load,readonly,data
467}
468
469addsec $tmp "$vmz" $ksection $object/empty.o
470if [ -z "$cacheit" ]; then
471    rm -f "$vmz"
472fi
473
474if [ -n "$initrd" ]; then
475    addsec $tmp "$initrd" $isection
476fi
477
478if [ -n "$dtb" ]; then
479    addsec $tmp "$dtb" .kernel:dtb
480    if [ -n "$dts" ]; then
481	rm $dtb
482    fi
483fi
484
485if [ -n "$esm_blob" ]; then
486    addsec $tmp "$esm_blob" $esection
487fi
488
489if [ "$platform" != "miboot" ]; then
490    if [ -n "$link_address" ] ; then
491        text_start="-Ttext $link_address"
492    fi
493#link everything
494    ${CROSS}ld -m $format -T $lds $text_start $pie $nodl $nowarn $rodynamic $notext -o "$ofile" $map \
495	$platformo $tmp $object/wrapper.a
496    rm $tmp
497fi
498
499# Some platforms need the zImage's entry point and base address
500base=0x`${CROSS}nm "$ofile" | grep ' _start$' | cut -d' ' -f1`
501entry=`${CROSS}objdump -f "$ofile" | grep '^start address ' | cut -d' ' -f3`
502
503if [ -n "$binary" ]; then
504    mv "$ofile" "$ofile".elf
505    ${CROSS}objcopy -O binary "$ofile".elf "$ofile"
506fi
507
508# post-processing needed for some platforms
509case "$platform" in
510pseries|chrp)
511    $objbin/addnote "$ofile"
512    ;;
513coff)
514    ${CROSS}objcopy -O aixcoff-rs6000 --set-start "$entry" "$ofile"
515    $objbin/hack-coff "$ofile"
516    ;;
517cuboot*)
518    gzip -n -f -9 "$ofile"
519    ${MKIMAGE} -A ppc -O linux -T kernel -C gzip -a "$base" -e "$entry" \
520            $uboot_version -d "$ofile".gz "$ofile"
521    ;;
522treeboot*)
523    mv "$ofile" "$ofile.elf"
524    $objbin/mktree "$ofile.elf" "$ofile" "$base" "$entry"
525    if [ -z "$cacheit" ]; then
526	rm -f "$ofile.elf"
527    fi
528    exit 0
529    ;;
530ps3)
531    # The ps3's loader supports loading a gzipped binary image from flash
532    # rom to ram addr zero. The loader then enters the system reset
533    # vector at addr 0x100.  A bootwrapper overlay is used to arrange for
534    # a binary image of the kernel to be at addr zero, and yet have a
535    # suitable bootwrapper entry at 0x100.  To construct the final rom
536    # image 512 bytes from offset 0x100 is copied to the bootwrapper
537    # place holder at symbol __system_reset_kernel.  The 512 bytes of the
538    # bootwrapper entry code at symbol __system_reset_overlay is then
539    # copied to offset 0x100.  At runtime the bootwrapper program copies
540    # the data at __system_reset_kernel back to addr 0x100.
541
542    system_reset_overlay=0x`${CROSS}nm "$ofile" \
543        | grep ' __system_reset_overlay$'       \
544        | cut -d' ' -f1`
545    system_reset_overlay=`printf "%d" $system_reset_overlay`
546    system_reset_kernel=0x`${CROSS}nm "$ofile" \
547        | grep ' __system_reset_kernel$'       \
548        | cut -d' ' -f1`
549    system_reset_kernel=`printf "%d" $system_reset_kernel`
550    overlay_dest="256"
551    overlay_size="512"
552
553    ${CROSS}objcopy -O binary "$ofile" "$ofile.bin"
554
555    run_cmd dd if="$ofile.bin" of="$ofile.bin" conv=notrunc   \
556        skip=$overlay_dest seek=$system_reset_kernel          \
557        count=$overlay_size bs=1
558
559    run_cmd dd if="$ofile.bin" of="$ofile.bin" conv=notrunc   \
560        skip=$system_reset_overlay seek=$overlay_dest         \
561        count=$overlay_size bs=1
562
563    odir="$(dirname "$ofile.bin")"
564
565    # The ps3's flash loader has a size limit of 16 MiB for the uncompressed
566    # image.  If a compressed image that exceeded this limit is written to
567    # flash the loader will decompress that image until the 16 MiB limit is
568    # reached, then enter the system reset vector of the partially decompressed
569    # image.  No warning is issued.
570    rm -f "$odir"/{otheros,otheros-too-big}.bld
571    size=$(${CROSS}nm --no-sort --radix=d "$ofile" | grep -E ' _end$' | cut -d' ' -f1)
572    bld="otheros.bld"
573    if [ $size -gt $((0x1000000)) ]; then
574        bld="otheros-too-big.bld"
575    fi
576    gzip -n --force -9 --stdout "$ofile.bin" > "$odir/$bld"
577    ;;
578esac
579