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# -c cache $kernel.strip.gz (use if present & newer, else make)
17# -C prefix specify command prefix for cross-building tools
18# (strip, objcopy, ld)
19# -D dir specify directory containing data files used by script
20# (default ./arch/powerpc/boot)
21# -W dir specify working directory for temporary files (default .)
22# -z use gzip (legacy)
23# -Z zsuffix compression to use (gz, xz or none)
24
25# Stop execution if any command fails
26set -e
27
28# Allow for verbose output
29if [ "$V" = 1 ]; then
30 set -x
31fi
32
33# defaults
34kernel=
35ofile=zImage
36platform=of
37initrd=
38dtb=
39dts=
40cacheit=
41binary=
42compression=.gz
43uboot_comp=gzip
44pie=
45format=
46
47# cross-compilation prefix
48CROSS=
49
50# mkimage wrapper script
51MKIMAGE=$srctree/scripts/mkuboot.sh
52
53# directory for object and other files used by this script
54object=arch/powerpc/boot
55objbin=$object
56dtc=scripts/dtc/dtc
57
58# directory for working files
59tmpdir=.
60
61usage() {
62 echo 'Usage: wrapper [-o output] [-p platform] [-i initrd]' >&2
63 echo ' [-d devtree] [-s tree.dts] [-c] [-C cross-prefix]' >&2
64 echo ' [-D datadir] [-W workingdir] [-Z (gz|xz|none)]' >&2
65 echo ' [--no-compression] [vmlinux]' >&2
66 exit 1
67}
68
69run_cmd() {
70 if [ "$V" = 1 ]; then
71 $* 2>&1
72 else
73 local msg
74
75 set +e
76 msg=$($* 2>&1)
77
78 if [ $? -ne "0" ]; then
79 echo $msg
80 exit 1
81 fi
82 set -e
83 fi
84}
85
86while [ "$#" -gt 0 ]; do
87 case "$1" in
88 -o)
89 shift
90 [ "$#" -gt 0 ] || usage
91 ofile="$1"
92 ;;
93 -p)
94 shift
95 [ "$#" -gt 0 ] || usage
96 platform="$1"
97 ;;
98 -i)
99 shift
100 [ "$#" -gt 0 ] || usage
101 initrd="$1"
102 ;;
103 -d)
104 shift
105 [ "$#" -gt 0 ] || usage
106 dtb="$1"
107 ;;
108 -s)
109 shift
110 [ "$#" -gt 0 ] || usage
111 dts="$1"
112 ;;
113 -c)
114 cacheit=y
115 ;;
116 -C)
117 shift
118 [ "$#" -gt 0 ] || usage
119 CROSS="$1"
120 ;;
121 -D)
122 shift
123 [ "$#" -gt 0 ] || usage
124 object="$1"
125 objbin="$1"
126 ;;
127 -W)
128 shift
129 [ "$#" -gt 0 ] || usage
130 tmpdir="$1"
131 ;;
132 -z)
133 compression=.gz
134 uboot_comp=gzip
135 ;;
136 -Z)
137 shift
138 [ "$#" -gt 0 ] || usage
139 [ "$1" != "gz" -o "$1" != "xz" -o "$1" != "lzma" -o "$1" != "lzo" -o "$1" != "none" ] || usage
140
141 compression=".$1"
142 uboot_comp=$1
143
144 if [ $compression = ".none" ]; then
145 compression=
146 uboot_comp=none
147 fi
148 if [ $uboot_comp = "gz" ]; then
149 uboot_comp=gzip
150 fi
151 ;;
152 --no-gzip)
153 # a "feature" of the the wrapper script is that it can be used outside
154 # the kernel tree. So keeping this around for backwards compatibility.
155 compression=
156 uboot_comp=none
157 ;;
158 -?)
159 usage
160 ;;
161 *)
162 [ -z "$kernel" ] || usage
163 kernel="$1"
164 ;;
165 esac
166 shift
167done
168
169
170if [ -n "$dts" ]; then
171 if [ ! -r "$dts" -a -r "$object/dts/$dts" ]; then
172 dts="$object/dts/$dts"
173 fi
174 if [ -z "$dtb" ]; then
175 dtb="$platform.dtb"
176 fi
177 $dtc -O dtb -o "$dtb" -b 0 "$dts"
178fi
179
180if [ -z "$kernel" ]; then
181 kernel=vmlinux
182fi
183
184LANG=C elfformat="`${CROSS}objdump -p "$kernel" | grep 'file format' | awk '{print $4}'`"
185case "$elfformat" in
186 elf64-powerpcle) format=elf64lppc ;;
187 elf64-powerpc) format=elf32ppc ;;
188 elf32-powerpc) format=elf32ppc ;;
189esac
190
191ld_version()
192{
193 # Poached from scripts/ld-version.sh, but we don't want to call that because
194 # this script (wrapper) is distributed separately from the kernel source.
195 # Extract linker version number from stdin and turn into single number.
196 awk '{
197 gsub(".*\\)", "");
198 gsub(".*version ", "");
199 gsub("-.*", "");
200 split($1,a, ".");
201 print a[1]*100000000 + a[2]*1000000 + a[3]*10000;
202 exit
203 }'
204}
205
206# Do not include PT_INTERP segment when linking pie. Non-pie linking
207# just ignores this option.
208LD_VERSION=$(${CROSS}ld --version | ld_version)
209LD_NO_DL_MIN_VERSION=$(echo 2.26 | ld_version)
210if [ "$LD_VERSION" -ge "$LD_NO_DL_MIN_VERSION" ] ; then
211 nodl="--no-dynamic-linker"
212fi
213
214platformo=$object/"$platform".o
215lds=$object/zImage.lds
216ext=strip
217objflags=-S
218tmp=$tmpdir/zImage.$$.o
219ksection=.kernel:vmlinux.strip
220isection=.kernel:initrd
221link_address='0x400000'
222make_space=y
223
224case "$platform" in
225of)
226 platformo="$object/of.o $object/epapr.o"
227 make_space=n
228 ;;
229pseries)
230 platformo="$object/pseries-head.o $object/of.o $object/epapr.o"
231 link_address='0x4000000'
232 if [ "$format" != "elf32ppc" ]; then
233 link_address=
234 pie=-pie
235 fi
236 make_space=n
237 ;;
238maple)
239 platformo="$object/of.o $object/epapr.o"
240 link_address='0x400000'
241 make_space=n
242 ;;
243pmac|chrp)
244 platformo="$object/of.o $object/epapr.o"
245 make_space=n
246 ;;
247coff)
248 platformo="$object/crt0.o $object/of.o $object/epapr.o"
249 lds=$object/zImage.coff.lds
250 link_address='0x500000'
251 make_space=n
252 pie=
253 ;;
254miboot|uboot*)
255 # miboot and U-boot want just the bare bits, not an ELF binary
256 ext=bin
257 objflags="-O binary"
258 tmp="$ofile"
259 ksection=image
260 isection=initrd
261 ;;
262cuboot*)
263 binary=y
264 compression=
265 case "$platform" in
266 *-mpc866ads|*-mpc885ads|*-adder875*|*-ep88xc)
267 platformo=$object/cuboot-8xx.o
268 ;;
269 *5200*|*-motionpro)
270 platformo=$object/cuboot-52xx.o
271 ;;
272 *-pq2fads|*-ep8248e|*-mpc8272*|*-storcenter)
273 platformo=$object/cuboot-pq2.o
274 ;;
275 *-mpc824*)
276 platformo=$object/cuboot-824x.o
277 ;;
278 *-mpc83*|*-asp834x*)
279 platformo=$object/cuboot-83xx.o
280 ;;
281 *-tqm8541|*-mpc8560*|*-tqm8560|*-tqm8555|*-ksi8560*)
282 platformo=$object/cuboot-85xx-cpm2.o
283 ;;
284 *-mpc85*|*-tqm85*|*-sbc85*)
285 platformo=$object/cuboot-85xx.o
286 ;;
287 *-amigaone)
288 link_address='0x800000'
289 ;;
290 esac
291 ;;
292ps3)
293 platformo="$object/ps3-head.o $object/ps3-hvcall.o $object/ps3.o"
294 lds=$object/zImage.ps3.lds
295 compression=
296 ext=bin
297 objflags="-O binary --set-section-flags=.bss=contents,alloc,load,data"
298 ksection=.kernel:vmlinux.bin
299 isection=.kernel:initrd
300 link_address=''
301 make_space=n
302 pie=
303 ;;
304ep88xc|ep405|ep8248e)
305 platformo="$object/fixed-head.o $object/$platform.o"
306 binary=y
307 ;;
308adder875-redboot)
309 platformo="$object/fixed-head.o $object/redboot-8xx.o"
310 binary=y
311 ;;
312simpleboot-virtex405-*)
313 platformo="$object/virtex405-head.o $object/simpleboot.o $object/virtex.o"
314 binary=y
315 ;;
316simpleboot-virtex440-*)
317 platformo="$object/fixed-head.o $object/simpleboot.o $object/virtex.o"
318 binary=y
319 ;;
320simpleboot-*)
321 platformo="$object/fixed-head.o $object/simpleboot.o"
322 binary=y
323 ;;
324asp834x-redboot)
325 platformo="$object/fixed-head.o $object/redboot-83xx.o"
326 binary=y
327 ;;
328xpedite52*)
329 link_address='0x1400000'
330 platformo=$object/cuboot-85xx.o
331 ;;
332gamecube|wii)
333 link_address='0x600000'
334 platformo="$object/$platform-head.o $object/$platform.o"
335 ;;
336treeboot-currituck)
337 link_address='0x1000000'
338 ;;
339treeboot-akebono)
340 link_address='0x1000000'
341 ;;
342treeboot-iss4xx-mpic)
343 platformo="$object/treeboot-iss4xx.o"
344 ;;
345epapr)
346 platformo="$object/pseries-head.o $object/epapr.o $object/epapr-wrapper.o"
347 link_address='0x20000000'
348 pie=-pie
349 ;;
350mvme5100)
351 platformo="$object/fixed-head.o $object/mvme5100.o"
352 binary=y
353 ;;
354mvme7100)
355 platformo="$object/motload-head.o $object/mvme7100.o"
356 link_address='0x4000000'
357 binary=y
358 ;;
359esac
360
361vmz="$tmpdir/`basename \"$kernel\"`.$ext"
362
363# Calculate the vmlinux.strip size
364${CROSS}objcopy $objflags "$kernel" "$vmz.$$"
365strip_size=$(${CONFIG_SHELL} "${srctree}/scripts/file-size.sh" "$vmz.$$")
366
367if [ -z "$cacheit" -o ! -f "$vmz$compression" -o "$vmz$compression" -ot "$kernel" ]; then
368 # recompress the image if we need to
369 case $compression in
370 .xz)
371 xz --check=crc32 -f -6 "$vmz.$$"
372 ;;
373 .gz)
374 gzip -n -f -9 "$vmz.$$"
375 ;;
376 .lzma)
377 xz --format=lzma -f -6 "$vmz.$$"
378 ;;
379 .lzo)
380 lzop -f -9 "$vmz.$$"
381 ;;
382 *)
383 # drop the compression suffix so the stripped vmlinux is used
384 compression=
385 uboot_comp=none
386 ;;
387 esac
388
389 if [ -n "$cacheit" ]; then
390 mv -f "$vmz.$$$compression" "$vmz$compression"
391 else
392 vmz="$vmz.$$"
393 fi
394else
395 rm -f $vmz.$$
396fi
397
398vmz="$vmz$compression"
399
400if [ "$make_space" = "y" ]; then
401 # Round the size to next higher MB limit
402 round_size=$(((strip_size + 0xfffff) & 0xfff00000))
403
404 round_size=0x$(printf "%x" $round_size)
405 link_addr=$(printf "%d" $link_address)
406
407 if [ $link_addr -lt $strip_size ]; then
408 echo "INFO: Uncompressed kernel (size 0x$(printf "%x\n" $strip_size))" \
409 "overlaps the address of the wrapper($link_address)"
410 echo "INFO: Fixing the link_address of wrapper to ($round_size)"
411 link_address=$round_size
412 fi
413fi
414
415# Extract kernel version information, some platforms want to include
416# it in the image header
417version=`${CROSS}strings "$kernel" | grep '^Linux version [-0-9.]' | \
418 cut -d' ' -f3`
419if [ -n "$version" ]; then
420 uboot_version="-n Linux-$version"
421fi
422
423# physical offset of kernel image
424membase=`${CROSS}objdump -p "$kernel" | grep -m 1 LOAD | awk '{print $7}'`
425
426case "$platform" in
427uboot)
428 rm -f "$ofile"
429 ${MKIMAGE} -A ppc -O linux -T kernel -C $uboot_comp -a $membase -e $membase \
430 $uboot_version -d "$vmz" "$ofile"
431 if [ -z "$cacheit" ]; then
432 rm -f "$vmz"
433 fi
434 exit 0
435 ;;
436uboot-obs600)
437 rm -f "$ofile"
438 # obs600 wants a multi image with an initrd, so we need to put a fake
439 # one in even when building a "normal" image.
440 if [ -n "$initrd" ]; then
441 real_rd="$initrd"
442 else
443 real_rd=`mktemp`
444 echo "\0" >>"$real_rd"
445 fi
446 ${MKIMAGE} -A ppc -O linux -T multi -C gzip -a $membase -e $membase \
447 $uboot_version -d "$vmz":"$real_rd":"$dtb" "$ofile"
448 if [ -z "$initrd" ]; then
449 rm -f "$real_rd"
450 fi
451 if [ -z "$cacheit" ]; then
452 rm -f "$vmz"
453 fi
454 exit 0
455 ;;
456esac
457
458addsec() {
459 ${CROSS}objcopy $4 $1 \
460 --add-section=$3="$2" \
461 --set-section-flags=$3=contents,alloc,load,readonly,data
462}
463
464addsec $tmp "$vmz" $ksection $object/empty.o
465if [ -z "$cacheit" ]; then
466 rm -f "$vmz"
467fi
468
469if [ -n "$initrd" ]; then
470 addsec $tmp "$initrd" $isection
471fi
472
473if [ -n "$dtb" ]; then
474 addsec $tmp "$dtb" .kernel:dtb
475 if [ -n "$dts" ]; then
476 rm $dtb
477 fi
478fi
479
480if [ "$platform" != "miboot" ]; then
481 if [ -n "$link_address" ] ; then
482 text_start="-Ttext $link_address"
483 fi
484#link everything
485 ${CROSS}ld -m $format -T $lds $text_start $pie $nodl -o "$ofile" \
486 $platformo $tmp $object/wrapper.a
487 rm $tmp
488fi
489
490# Some platforms need the zImage's entry point and base address
491base=0x`${CROSS}nm "$ofile" | grep ' _start$' | cut -d' ' -f1`
492entry=`${CROSS}objdump -f "$ofile" | grep '^start address ' | cut -d' ' -f3`
493
494if [ -n "$binary" ]; then
495 mv "$ofile" "$ofile".elf
496 ${CROSS}objcopy -O binary "$ofile".elf "$ofile"
497fi
498
499# post-processing needed for some platforms
500case "$platform" in
501pseries|chrp|maple)
502 $objbin/addnote "$ofile"
503 ;;
504coff)
505 ${CROSS}objcopy -O aixcoff-rs6000 --set-start "$entry" "$ofile"
506 $objbin/hack-coff "$ofile"
507 ;;
508cuboot*)
509 gzip -n -f -9 "$ofile"
510 ${MKIMAGE} -A ppc -O linux -T kernel -C gzip -a "$base" -e "$entry" \
511 $uboot_version -d "$ofile".gz "$ofile"
512 ;;
513treeboot*)
514 mv "$ofile" "$ofile.elf"
515 $objbin/mktree "$ofile.elf" "$ofile" "$base" "$entry"
516 if [ -z "$cacheit" ]; then
517 rm -f "$ofile.elf"
518 fi
519 exit 0
520 ;;
521ps3)
522 # The ps3's loader supports loading a gzipped binary image from flash
523 # rom to ram addr zero. The loader then enters the system reset
524 # vector at addr 0x100. A bootwrapper overlay is used to arrange for
525 # a binary image of the kernel to be at addr zero, and yet have a
526 # suitable bootwrapper entry at 0x100. To construct the final rom
527 # image 512 bytes from offset 0x100 is copied to the bootwrapper
528 # place holder at symbol __system_reset_kernel. The 512 bytes of the
529 # bootwrapper entry code at symbol __system_reset_overlay is then
530 # copied to offset 0x100. At runtime the bootwrapper program copies
531 # the data at __system_reset_kernel back to addr 0x100.
532
533 system_reset_overlay=0x`${CROSS}nm "$ofile" \
534 | grep ' __system_reset_overlay$' \
535 | cut -d' ' -f1`
536 system_reset_overlay=`printf "%d" $system_reset_overlay`
537 system_reset_kernel=0x`${CROSS}nm "$ofile" \
538 | grep ' __system_reset_kernel$' \
539 | cut -d' ' -f1`
540 system_reset_kernel=`printf "%d" $system_reset_kernel`
541 overlay_dest="256"
542 overlay_size="512"
543
544 ${CROSS}objcopy -O binary "$ofile" "$ofile.bin"
545
546 run_cmd dd if="$ofile.bin" of="$ofile.bin" conv=notrunc \
547 skip=$overlay_dest seek=$system_reset_kernel \
548 count=$overlay_size bs=1
549
550 run_cmd dd if="$ofile.bin" of="$ofile.bin" conv=notrunc \
551 skip=$system_reset_overlay seek=$overlay_dest \
552 count=$overlay_size bs=1
553
554 odir="$(dirname "$ofile.bin")"
555 rm -f "$odir/otheros.bld"
556 gzip -n --force -9 --stdout "$ofile.bin" > "$odir/otheros.bld"
557 ;;
558esac