Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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($1,a, ".");
213 print a[1]*100000000 + a[2]*1000000 + a[3]*10000;
214 exit
215 }'
216}
217
218# Do not include PT_INTERP segment when linking pie. Non-pie linking
219# just ignores this option.
220LD_VERSION=$(${CROSS}ld --version | ld_version)
221LD_NO_DL_MIN_VERSION=$(echo 2.26 | ld_version)
222if [ "$LD_VERSION" -ge "$LD_NO_DL_MIN_VERSION" ] ; then
223 nodl="--no-dynamic-linker"
224fi
225
226platformo=$object/"$platform".o
227lds=$object/zImage.lds
228ext=strip
229objflags=-S
230tmp=$tmpdir/zImage.$$.o
231ksection=.kernel:vmlinux.strip
232isection=.kernel:initrd
233esection=.kernel:esm_blob
234link_address='0x400000'
235make_space=y
236
237
238if [ -n "$esm_blob" -a "$platform" != "pseries" ]; then
239 echo "ESM blob not support on non-pseries platforms" >&2
240 exit 1
241fi
242
243case "$platform" in
244of)
245 platformo="$object/of.o $object/epapr.o"
246 make_space=n
247 ;;
248pseries)
249 platformo="$object/pseries-head.o $object/of.o $object/epapr.o"
250 link_address='0x4000000'
251 if [ "$format" != "elf32ppc" ]; then
252 link_address=
253 pie=-pie
254 fi
255 make_space=n
256 ;;
257maple)
258 platformo="$object/of.o $object/epapr.o"
259 link_address='0x400000'
260 make_space=n
261 ;;
262pmac|chrp)
263 platformo="$object/of.o $object/epapr.o"
264 make_space=n
265 ;;
266coff)
267 platformo="$object/crt0.o $object/of.o $object/epapr.o"
268 lds=$object/zImage.coff.lds
269 link_address='0x500000'
270 make_space=n
271 pie=
272 ;;
273miboot|uboot*)
274 # miboot and U-boot want just the bare bits, not an ELF binary
275 ext=bin
276 objflags="-O binary"
277 tmp="$ofile"
278 ksection=image
279 isection=initrd
280 ;;
281cuboot*)
282 binary=y
283 compression=
284 case "$platform" in
285 *-mpc866ads|*-mpc885ads|*-adder875*|*-ep88xc)
286 platformo=$object/cuboot-8xx.o
287 ;;
288 *5200*|*-motionpro)
289 platformo=$object/cuboot-52xx.o
290 ;;
291 *-pq2fads|*-ep8248e|*-mpc8272*|*-storcenter)
292 platformo=$object/cuboot-pq2.o
293 ;;
294 *-mpc824*)
295 platformo=$object/cuboot-824x.o
296 ;;
297 *-mpc83*|*-asp834x*)
298 platformo=$object/cuboot-83xx.o
299 ;;
300 *-tqm8541|*-mpc8560*|*-tqm8560|*-tqm8555|*-ksi8560*)
301 platformo=$object/cuboot-85xx-cpm2.o
302 ;;
303 *-mpc85*|*-tqm85*)
304 platformo=$object/cuboot-85xx.o
305 ;;
306 *-amigaone)
307 link_address='0x800000'
308 ;;
309 esac
310 ;;
311ps3)
312 platformo="$object/ps3-head.o $object/ps3-hvcall.o $object/ps3.o"
313 lds=$object/zImage.ps3.lds
314 compression=
315 ext=bin
316 objflags="-O binary --set-section-flags=.bss=contents,alloc,load,data"
317 ksection=.kernel:vmlinux.bin
318 isection=.kernel:initrd
319 link_address=''
320 make_space=n
321 pie=
322 ;;
323ep88xc|ep405|ep8248e)
324 platformo="$object/fixed-head.o $object/$platform.o"
325 binary=y
326 ;;
327adder875-redboot)
328 platformo="$object/fixed-head.o $object/redboot-8xx.o"
329 binary=y
330 ;;
331simpleboot-*)
332 platformo="$object/fixed-head.o $object/simpleboot.o"
333 binary=y
334 ;;
335asp834x-redboot)
336 platformo="$object/fixed-head.o $object/redboot-83xx.o"
337 binary=y
338 ;;
339xpedite52*)
340 link_address='0x1400000'
341 platformo=$object/cuboot-85xx.o
342 ;;
343gamecube|wii)
344 link_address='0x600000'
345 platformo="$object/$platform-head.o $object/$platform.o"
346 ;;
347microwatt)
348 link_address='0x500000'
349 platformo="$object/fixed-head.o $object/$platform.o"
350 binary=y
351 ;;
352treeboot-currituck)
353 link_address='0x1000000'
354 ;;
355treeboot-akebono)
356 link_address='0x1000000'
357 ;;
358treeboot-iss4xx-mpic)
359 platformo="$object/treeboot-iss4xx.o"
360 ;;
361epapr)
362 platformo="$object/pseries-head.o $object/epapr.o $object/epapr-wrapper.o"
363 link_address='0x20000000'
364 pie=-pie
365 notext='-z notext'
366 rodynamic=$(if ${CROSS}ld -V 2>&1 | grep -q LLD ; then echo "-z rodynamic"; fi)
367 ;;
368mvme5100)
369 platformo="$object/fixed-head.o $object/mvme5100.o"
370 binary=y
371 ;;
372mvme7100)
373 platformo="$object/motload-head.o $object/mvme7100.o"
374 link_address='0x4000000'
375 binary=y
376 ;;
377esac
378
379vmz="$tmpdir/`basename \"$kernel\"`.$ext"
380
381# Calculate the vmlinux.strip size
382${CROSS}objcopy $objflags "$kernel" "$vmz.$$"
383strip_size=$(${CONFIG_SHELL} "${srctree}/scripts/file-size.sh" "$vmz.$$")
384
385if [ -z "$cacheit" -o ! -f "$vmz$compression" -o "$vmz$compression" -ot "$kernel" ]; then
386 # recompress the image if we need to
387 case $compression in
388 .xz)
389 xz --check=crc32 -f -6 "$vmz.$$"
390 ;;
391 .gz)
392 gzip -n -f -9 "$vmz.$$"
393 ;;
394 .lzma)
395 xz --format=lzma -f -6 "$vmz.$$"
396 ;;
397 .lzo)
398 lzop -f -9 "$vmz.$$"
399 ;;
400 *)
401 # drop the compression suffix so the stripped vmlinux is used
402 compression=
403 uboot_comp=none
404 ;;
405 esac
406
407 if [ -n "$cacheit" ]; then
408 mv -f "$vmz.$$$compression" "$vmz$compression"
409 else
410 vmz="$vmz.$$"
411 fi
412else
413 rm -f $vmz.$$
414fi
415
416vmz="$vmz$compression"
417
418if [ "$make_space" = "y" ]; then
419 # Round the size to next higher MB limit
420 round_size=$(((strip_size + 0xfffff) & 0xfff00000))
421
422 round_size=0x$(printf "%x" $round_size)
423 link_addr=$(printf "%d" $link_address)
424
425 if [ $link_addr -lt $strip_size ]; then
426 echo "INFO: Uncompressed kernel (size 0x$(printf "%x\n" $strip_size))" \
427 "overlaps the address of the wrapper($link_address)"
428 echo "INFO: Fixing the link_address of wrapper to ($round_size)"
429 link_address=$round_size
430 fi
431fi
432
433# Extract kernel version information, some platforms want to include
434# it in the image header
435version=`${CROSS}strings "$kernel" | grep '^Linux version [-0-9.]' | \
436 cut -d' ' -f3`
437if [ -n "$version" ]; then
438 uboot_version="-n Linux-$version"
439fi
440
441# physical offset of kernel image
442membase=`${CROSS}objdump -p "$kernel" | grep -m 1 LOAD | awk '{print $7}'`
443
444case "$platform" in
445uboot)
446 rm -f "$ofile"
447 ${MKIMAGE} -A ppc -O linux -T kernel -C $uboot_comp -a $membase -e $membase \
448 $uboot_version -d "$vmz" "$ofile"
449 if [ -z "$cacheit" ]; then
450 rm -f "$vmz"
451 fi
452 exit 0
453 ;;
454uboot-obs600)
455 rm -f "$ofile"
456 # obs600 wants a multi image with an initrd, so we need to put a fake
457 # one in even when building a "normal" image.
458 if [ -n "$initrd" ]; then
459 real_rd="$initrd"
460 else
461 real_rd=`mktemp`
462 echo "\0" >>"$real_rd"
463 fi
464 ${MKIMAGE} -A ppc -O linux -T multi -C gzip -a $membase -e $membase \
465 $uboot_version -d "$vmz":"$real_rd":"$dtb" "$ofile"
466 if [ -z "$initrd" ]; then
467 rm -f "$real_rd"
468 fi
469 if [ -z "$cacheit" ]; then
470 rm -f "$vmz"
471 fi
472 exit 0
473 ;;
474esac
475
476addsec() {
477 ${CROSS}objcopy $4 $1 \
478 --add-section=$3="$2" \
479 --set-section-flags=$3=contents,alloc,load,readonly,data
480}
481
482addsec $tmp "$vmz" $ksection $object/empty.o
483if [ -z "$cacheit" ]; then
484 rm -f "$vmz"
485fi
486
487if [ -n "$initrd" ]; then
488 addsec $tmp "$initrd" $isection
489fi
490
491if [ -n "$dtb" ]; then
492 addsec $tmp "$dtb" .kernel:dtb
493 if [ -n "$dts" ]; then
494 rm $dtb
495 fi
496fi
497
498if [ -n "$esm_blob" ]; then
499 addsec $tmp "$esm_blob" $esection
500fi
501
502if [ "$platform" != "miboot" ]; then
503 if [ -n "$link_address" ] ; then
504 text_start="-Ttext $link_address"
505 fi
506#link everything
507 ${CROSS}ld -m $format -T $lds $text_start $pie $nodl $rodynamic $notext -o "$ofile" $map \
508 $platformo $tmp $object/wrapper.a
509 rm $tmp
510fi
511
512# Some platforms need the zImage's entry point and base address
513base=0x`${CROSS}nm "$ofile" | grep ' _start$' | cut -d' ' -f1`
514entry=`${CROSS}objdump -f "$ofile" | grep '^start address ' | cut -d' ' -f3`
515
516if [ -n "$binary" ]; then
517 mv "$ofile" "$ofile".elf
518 ${CROSS}objcopy -O binary "$ofile".elf "$ofile"
519fi
520
521# post-processing needed for some platforms
522case "$platform" in
523pseries|chrp|maple)
524 $objbin/addnote "$ofile"
525 ;;
526coff)
527 ${CROSS}objcopy -O aixcoff-rs6000 --set-start "$entry" "$ofile"
528 $objbin/hack-coff "$ofile"
529 ;;
530cuboot*)
531 gzip -n -f -9 "$ofile"
532 ${MKIMAGE} -A ppc -O linux -T kernel -C gzip -a "$base" -e "$entry" \
533 $uboot_version -d "$ofile".gz "$ofile"
534 ;;
535treeboot*)
536 mv "$ofile" "$ofile.elf"
537 $objbin/mktree "$ofile.elf" "$ofile" "$base" "$entry"
538 if [ -z "$cacheit" ]; then
539 rm -f "$ofile.elf"
540 fi
541 exit 0
542 ;;
543ps3)
544 # The ps3's loader supports loading a gzipped binary image from flash
545 # rom to ram addr zero. The loader then enters the system reset
546 # vector at addr 0x100. A bootwrapper overlay is used to arrange for
547 # a binary image of the kernel to be at addr zero, and yet have a
548 # suitable bootwrapper entry at 0x100. To construct the final rom
549 # image 512 bytes from offset 0x100 is copied to the bootwrapper
550 # place holder at symbol __system_reset_kernel. The 512 bytes of the
551 # bootwrapper entry code at symbol __system_reset_overlay is then
552 # copied to offset 0x100. At runtime the bootwrapper program copies
553 # the data at __system_reset_kernel back to addr 0x100.
554
555 system_reset_overlay=0x`${CROSS}nm "$ofile" \
556 | grep ' __system_reset_overlay$' \
557 | cut -d' ' -f1`
558 system_reset_overlay=`printf "%d" $system_reset_overlay`
559 system_reset_kernel=0x`${CROSS}nm "$ofile" \
560 | grep ' __system_reset_kernel$' \
561 | cut -d' ' -f1`
562 system_reset_kernel=`printf "%d" $system_reset_kernel`
563 overlay_dest="256"
564 overlay_size="512"
565
566 ${CROSS}objcopy -O binary "$ofile" "$ofile.bin"
567
568 run_cmd dd if="$ofile.bin" of="$ofile.bin" conv=notrunc \
569 skip=$overlay_dest seek=$system_reset_kernel \
570 count=$overlay_size bs=1
571
572 run_cmd dd if="$ofile.bin" of="$ofile.bin" conv=notrunc \
573 skip=$system_reset_overlay seek=$overlay_dest \
574 count=$overlay_size bs=1
575
576 odir="$(dirname "$ofile.bin")"
577
578 # The ps3's flash loader has a size limit of 16 MiB for the uncompressed
579 # image. If a compressed image that exceeded this limit is written to
580 # flash the loader will decompress that image until the 16 MiB limit is
581 # reached, then enter the system reset vector of the partially decompressed
582 # image. No warning is issued.
583 rm -f "$odir"/{otheros,otheros-too-big}.bld
584 size=$(${CROSS}nm --no-sort --radix=d "$ofile" | egrep ' _end$' | cut -d' ' -f1)
585 bld="otheros.bld"
586 if [ $size -gt $((0x1000000)) ]; then
587 bld="otheros-too-big.bld"
588 fi
589 gzip -n --force -9 --stdout "$ofile.bin" > "$odir/$bld"
590 ;;
591esac