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