xref: /linux/arch/powerpc/boot/wrapper (revision 4b132aacb0768ac1e652cf517097ea6f237214b9) 
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 $kernel.strip.gz (use if present & newer, else make)
18# -C prefix	specify command prefix for cross-building tools
19#		(strip, objcopy, ld)
20# -D dir	specify directory containing data files used by script
21#		(default ./arch/powerpc/boot)
22# -W dir	specify working directory for temporary files (default .)
23# -z		use gzip (legacy)
24# -Z zsuffix    compression to use (gz, xz or none)
25
26# Stop execution if any command fails
27set -e
28
29export LC_ALL=C
30
31# Allow for verbose output
32if [ "$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|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	${CROSS}ld -V 2>&1 | grep -q LLD
225}
226
227# Do not include PT_INTERP segment when linking pie. Non-pie linking
228# just ignores this option.
229LD_VERSION=$(${CROSS}ld --version | ld_version)
230LD_NO_DL_MIN_VERSION=$(echo 2.26 | ld_version)
231if [ "$LD_VERSION" -ge "$LD_NO_DL_MIN_VERSION" ] ; then
232	nodl="--no-dynamic-linker"
233fi
234
235# suppress some warnings in recent ld versions
236nowarn="-z noexecstack"
237if ! ld_is_lld; then
238	if [ "$LD_VERSION" -ge "$(echo 2.39 | ld_version)" ]; then
239		nowarn="$nowarn --no-warn-rwx-segments"
240	fi
241fi
242
243platformo=$object/"$platform".o
244lds=$object/zImage.lds
245ext=strip
246objflags=-S
247tmp=$tmpdir/zImage.$$.o
248ksection=.kernel:vmlinux.strip
249isection=.kernel:initrd
250esection=.kernel:esm_blob
251link_address='0x400000'
252make_space=y
253
254
255if [ -n "$esm_blob" -a "$platform" != "pseries" ]; then
256    echo "ESM blob not support on non-pseries platforms" >&2
257    exit 1
258fi
259
260case "$platform" in
261of)
262    platformo="$object/of.o $object/epapr.o"
263    make_space=n
264    ;;
265pseries)
266    platformo="$object/pseries-head.o $object/of.o $object/epapr.o"
267    link_address='0x4000000'
268    if [ "$format" != "elf32ppc" ]; then
269	link_address=
270	pie=-pie
271    fi
272    make_space=n
273    ;;
274maple)
275    platformo="$object/of.o $object/epapr.o"
276    link_address='0x400000'
277    make_space=n
278    ;;
279pmac|chrp)
280    platformo="$object/of.o $object/epapr.o"
281    make_space=n
282    ;;
283coff)
284    platformo="$object/crt0.o $object/of.o $object/epapr.o"
285    lds=$object/zImage.coff.lds
286    link_address='0x500000'
287    make_space=n
288    pie=
289    ;;
290miboot|uboot*)
291    # miboot and U-boot want just the bare bits, not an ELF binary
292    ext=bin
293    objflags="-O binary"
294    tmp="$ofile"
295    ksection=image
296    isection=initrd
297    ;;
298cuboot*)
299    binary=y
300    compression=
301    case "$platform" in
302    *-mpc866ads|*-mpc885ads|*-adder875*|*-ep88xc)
303        platformo=$object/cuboot-8xx.o
304        ;;
305    *5200*|*-motionpro)
306        platformo=$object/cuboot-52xx.o
307        ;;
308    *-pq2fads|*-ep8248e|*-mpc8272*|*-storcenter)
309        platformo=$object/cuboot-pq2.o
310        ;;
311    *-mpc824*)
312        platformo=$object/cuboot-824x.o
313        ;;
314    *-mpc83*|*-asp834x*)
315        platformo=$object/cuboot-83xx.o
316        ;;
317    *-tqm8541|*-mpc8560*|*-tqm8560|*-tqm8555|*-ksi8560*)
318        platformo=$object/cuboot-85xx-cpm2.o
319        ;;
320    *-mpc85*|*-tqm85*)
321        platformo=$object/cuboot-85xx.o
322        ;;
323    *-amigaone)
324        link_address='0x800000'
325        ;;
326    esac
327    ;;
328ps3)
329    platformo="$object/ps3-head.o $object/ps3-hvcall.o $object/ps3.o"
330    lds=$object/zImage.ps3.lds
331    compression=
332    ext=bin
333    objflags="-O binary --set-section-flags=.bss=contents,alloc,load,data"
334    ksection=.kernel:vmlinux.bin
335    isection=.kernel:initrd
336    link_address=''
337    make_space=n
338    pie=
339    ;;
340ep88xc|ep8248e)
341    platformo="$object/fixed-head.o $object/$platform.o"
342    binary=y
343    ;;
344adder875-redboot)
345    platformo="$object/fixed-head.o $object/redboot-8xx.o"
346    binary=y
347    ;;
348simpleboot-*)
349    platformo="$object/fixed-head.o $object/simpleboot.o"
350    binary=y
351    ;;
352asp834x-redboot)
353    platformo="$object/fixed-head.o $object/redboot-83xx.o"
354    binary=y
355    ;;
356xpedite52*)
357    link_address='0x1400000'
358    platformo=$object/cuboot-85xx.o
359    ;;
360gamecube|wii)
361    link_address='0x600000'
362    platformo="$object/$platform-head.o $object/$platform.o"
363    ;;
364microwatt)
365    link_address='0x500000'
366    platformo="$object/fixed-head.o $object/$platform.o"
367    binary=y
368    ;;
369treeboot-currituck)
370    link_address='0x1000000'
371    ;;
372treeboot-akebono)
373    link_address='0x1000000'
374    ;;
375treeboot-iss4xx-mpic)
376    platformo="$object/treeboot-iss4xx.o"
377    ;;
378epapr)
379    platformo="$object/pseries-head.o $object/epapr.o $object/epapr-wrapper.o"
380    link_address='0x20000000'
381    pie=-pie
382    notext='-z notext'
383    rodynamic=$(if ${CROSS}ld -V 2>&1 | grep -q LLD ; then echo "-z rodynamic"; fi)
384    ;;
385mvme5100)
386    platformo="$object/fixed-head.o $object/mvme5100.o"
387    binary=y
388    ;;
389mvme7100)
390    platformo="$object/motload-head.o $object/mvme7100.o"
391    link_address='0x4000000'
392    binary=y
393    ;;
394esac
395
396vmz="$tmpdir/`basename \"$kernel\"`.$ext"
397
398# Calculate the vmlinux.strip size
399${CROSS}objcopy $objflags "$kernel" "$vmz.$$"
400strip_size=$(${CONFIG_SHELL} "${srctree}/scripts/file-size.sh" "$vmz.$$")
401
402if [ -z "$cacheit" -o ! -f "$vmz$compression" -o "$vmz$compression" -ot "$kernel" ]; then
403    # recompress the image if we need to
404    case $compression in
405    .xz)
406        xz --check=crc32 -f -6 "$vmz.$$"
407        ;;
408    .gz)
409        gzip -n -f -9 "$vmz.$$"
410        ;;
411    .lzma)
412        xz --format=lzma -f -6 "$vmz.$$"
413	;;
414    .lzo)
415        lzop -f -9 "$vmz.$$"
416	;;
417    *)
418        # drop the compression suffix so the stripped vmlinux is used
419        compression=
420	uboot_comp=none
421	;;
422    esac
423
424    if [ -n "$cacheit" ]; then
425	mv -f "$vmz.$$$compression" "$vmz$compression"
426    else
427	vmz="$vmz.$$"
428    fi
429else
430    rm -f $vmz.$$
431fi
432
433vmz="$vmz$compression"
434
435if [ "$make_space" = "y" ]; then
436	# Round the size to next higher MB limit
437	round_size=$(((strip_size + 0xfffff) & 0xfff00000))
438
439	round_size=0x$(printf "%x" $round_size)
440	link_addr=$(printf "%d" $link_address)
441
442	if [ $link_addr -lt $strip_size ]; then
443	    echo "INFO: Uncompressed kernel (size 0x$(printf "%x\n" $strip_size))" \
444			"overlaps the address of the wrapper($link_address)"
445	    echo "INFO: Fixing the link_address of wrapper to ($round_size)"
446	    link_address=$round_size
447	fi
448fi
449
450# Extract kernel version information, some platforms want to include
451# it in the image header
452version=`${CROSS}strings "$kernel" | grep '^Linux version [-0-9.]' | \
453    head -n1 | cut -d' ' -f3`
454if [ -n "$version" ]; then
455    uboot_version="-n Linux-$version"
456fi
457
458# physical offset of kernel image
459membase=`${CROSS}objdump -p "$kernel" | grep -m 1 LOAD | awk '{print $7}'`
460
461case "$platform" in
462uboot)
463    rm -f "$ofile"
464    ${MKIMAGE} -A ppc -O linux -T kernel -C $uboot_comp -a $membase -e $membase \
465	$uboot_version -d "$vmz" "$ofile"
466    if [ -z "$cacheit" ]; then
467	rm -f "$vmz"
468    fi
469    exit 0
470    ;;
471esac
472
473addsec() {
474    ${CROSS}objcopy $4 $1 \
475	--add-section=$3="$2" \
476	--set-section-flags=$3=contents,alloc,load,readonly,data
477}
478
479addsec $tmp "$vmz" $ksection $object/empty.o
480if [ -z "$cacheit" ]; then
481    rm -f "$vmz"
482fi
483
484if [ -n "$initrd" ]; then
485    addsec $tmp "$initrd" $isection
486fi
487
488if [ -n "$dtb" ]; then
489    addsec $tmp "$dtb" .kernel:dtb
490    if [ -n "$dts" ]; then
491	rm $dtb
492    fi
493fi
494
495if [ -n "$esm_blob" ]; then
496    addsec $tmp "$esm_blob" $esection
497fi
498
499if [ "$platform" != "miboot" ]; then
500    if [ -n "$link_address" ] ; then
501        text_start="-Ttext $link_address"
502    fi
503#link everything
504    ${CROSS}ld -m $format -T $lds $text_start $pie $nodl $nowarn $rodynamic $notext -o "$ofile" $map \
505	$platformo $tmp $object/wrapper.a
506    rm $tmp
507fi
508
509# Some platforms need the zImage's entry point and base address
510base=0x`${CROSS}nm "$ofile" | grep ' _start$' | cut -d' ' -f1`
511entry=`${CROSS}objdump -f "$ofile" | grep '^start address ' | cut -d' ' -f3`
512
513if [ -n "$binary" ]; then
514    mv "$ofile" "$ofile".elf
515    ${CROSS}objcopy -O binary "$ofile".elf "$ofile"
516fi
517
518# post-processing needed for some platforms
519case "$platform" in
520pseries|chrp|maple)
521    $objbin/addnote "$ofile"
522    ;;
523coff)
524    ${CROSS}objcopy -O aixcoff-rs6000 --set-start "$entry" "$ofile"
525    $objbin/hack-coff "$ofile"
526    ;;
527cuboot*)
528    gzip -n -f -9 "$ofile"
529    ${MKIMAGE} -A ppc -O linux -T kernel -C gzip -a "$base" -e "$entry" \
530            $uboot_version -d "$ofile".gz "$ofile"
531    ;;
532treeboot*)
533    mv "$ofile" "$ofile.elf"
534    $objbin/mktree "$ofile.elf" "$ofile" "$base" "$entry"
535    if [ -z "$cacheit" ]; then
536	rm -f "$ofile.elf"
537    fi
538    exit 0
539    ;;
540ps3)
541    # The ps3's loader supports loading a gzipped binary image from flash
542    # rom to ram addr zero. The loader then enters the system reset
543    # vector at addr 0x100.  A bootwrapper overlay is used to arrange for
544    # a binary image of the kernel to be at addr zero, and yet have a
545    # suitable bootwrapper entry at 0x100.  To construct the final rom
546    # image 512 bytes from offset 0x100 is copied to the bootwrapper
547    # place holder at symbol __system_reset_kernel.  The 512 bytes of the
548    # bootwrapper entry code at symbol __system_reset_overlay is then
549    # copied to offset 0x100.  At runtime the bootwrapper program copies
550    # the data at __system_reset_kernel back to addr 0x100.
551
552    system_reset_overlay=0x`${CROSS}nm "$ofile" \
553        | grep ' __system_reset_overlay$'       \
554        | cut -d' ' -f1`
555    system_reset_overlay=`printf "%d" $system_reset_overlay`
556    system_reset_kernel=0x`${CROSS}nm "$ofile" \
557        | grep ' __system_reset_kernel$'       \
558        | cut -d' ' -f1`
559    system_reset_kernel=`printf "%d" $system_reset_kernel`
560    overlay_dest="256"
561    overlay_size="512"
562
563    ${CROSS}objcopy -O binary "$ofile" "$ofile.bin"
564
565    run_cmd dd if="$ofile.bin" of="$ofile.bin" conv=notrunc   \
566        skip=$overlay_dest seek=$system_reset_kernel          \
567        count=$overlay_size bs=1
568
569    run_cmd dd if="$ofile.bin" of="$ofile.bin" conv=notrunc   \
570        skip=$system_reset_overlay seek=$overlay_dest         \
571        count=$overlay_size bs=1
572
573    odir="$(dirname "$ofile.bin")"
574
575    # The ps3's flash loader has a size limit of 16 MiB for the uncompressed
576    # image.  If a compressed image that exceeded this limit is written to
577    # flash the loader will decompress that image until the 16 MiB limit is
578    # reached, then enter the system reset vector of the partially decompressed
579    # image.  No warning is issued.
580    rm -f "$odir"/{otheros,otheros-too-big}.bld
581    size=$(${CROSS}nm --no-sort --radix=d "$ofile" | grep -E ' _end$' | cut -d' ' -f1)
582    bld="otheros.bld"
583    if [ $size -gt $((0x1000000)) ]; then
584        bld="otheros-too-big.bld"
585    fi
586    gzip -n --force -9 --stdout "$ofile.bin" > "$odir/$bld"
587    ;;
588esac
589