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
3# Copyright (C) 2006 Paul Mackerras, IBM Corporation <paulus@samba.org>
4# This program may be used under the terms of version 2 of the GNU
5# General Public License.
6
7# This script takes a kernel binary and optionally an initrd image
8# and/or a device-tree blob, and creates a bootable zImage for a
9# given platform.
10
11# Options:
12# -o zImage specify output file
13# -p platform specify platform (links in $platform.o)
14# -i initrd specify initrd file
15# -d devtree specify device-tree blob
16# -s tree.dts specify device-tree source file (needs dtc installed)
17# -c cache $kernel.strip.gz (use if present & newer, else make)
18# -C prefix specify command prefix for cross-building tools
19# (strip, objcopy, ld)
20# -D dir specify directory containing data files used by script
21# (default ./arch/powerpc/boot)
22# -W dir specify working directory for temporary files (default .)
23# -z use gzip (legacy)
24# -Z zsuffix compression to use (gz, xz or none)
25
26# Stop execution if any command fails
27set -e
28
29# Allow for verbose output
30if [ "$V" = 1 ]; then
31 set -x
32fi
33
34# defaults
35kernel=
36ofile=zImage
37platform=of
38initrd=
39dtb=
40dts=
41cacheit=
42binary=
43compression=.gz
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="$1"
131 ;;
132 -z)
133 compression=.gz
134 ;;
135 -Z)
136 shift
137 [ "$#" -gt 0 ] || usage
138 [ "$1" != "gz" -o "$1" != "xz" -o "$1" != "none" ] || usage
139
140 compression=".$1"
141
142 if [ $compression = ".none" ]; then
143 compression=
144 fi
145 ;;
146 --no-gzip)
147 # a "feature" of the the wrapper script is that it can be used outside
148 # the kernel tree. So keeping this around for backwards compatibility.
149 compression=
150 ;;
151 -?)
152 usage
153 ;;
154 *)
155 [ -z "$kernel" ] || usage
156 kernel="$1"
157 ;;
158 esac
159 shift
160done
161
162
163if [ -n "$dts" ]; then
164 if [ ! -r "$dts" -a -r "$object/dts/$dts" ]; then
165 dts="$object/dts/$dts"
166 fi
167 if [ -z "$dtb" ]; then
168 dtb="$platform.dtb"
169 fi
170 $dtc -O dtb -o "$dtb" -b 0 "$dts"
171fi
172
173if [ -z "$kernel" ]; then
174 kernel=vmlinux
175fi
176
177LANG=C elfformat="`${CROSS}objdump -p "$kernel" | grep 'file format' | awk '{print $4}'`"
178case "$elfformat" in
179 elf64-powerpcle) format=elf64lppc ;;
180 elf64-powerpc) format=elf32ppc ;;
181 elf32-powerpc) format=elf32ppc ;;
182esac
183
184
185platformo=$object/"$platform".o
186lds=$object/zImage.lds
187ext=strip
188objflags=-S
189tmp=$tmpdir/zImage.$$.o
190ksection=.kernel:vmlinux.strip
191isection=.kernel:initrd
192link_address='0x400000'
193make_space=y
194
195case "$platform" in
196of)
197 platformo="$object/of.o $object/epapr.o"
198 make_space=n
199 ;;
200pseries)
201 platformo="$object/pseries-head.o $object/of.o $object/epapr.o"
202 link_address='0x4000000'
203 if [ "$format" != "elf32ppc" ]; then
204 link_address=
205 pie=-pie
206 fi
207 make_space=n
208 ;;
209maple)
210 platformo="$object/of.o $object/epapr.o"
211 link_address='0x400000'
212 make_space=n
213 ;;
214pmac|chrp)
215 platformo="$object/of.o $object/epapr.o"
216 make_space=n
217 ;;
218coff)
219 platformo="$object/crt0.o $object/of.o $object/epapr.o"
220 lds=$object/zImage.coff.lds
221 link_address='0x500000'
222 make_space=n
223 pie=
224 ;;
225miboot|uboot*)
226 # miboot and U-boot want just the bare bits, not an ELF binary
227 ext=bin
228 objflags="-O binary"
229 tmp="$ofile"
230 ksection=image
231 isection=initrd
232 ;;
233cuboot*)
234 binary=y
235 compression=
236 case "$platform" in
237 *-mpc866ads|*-mpc885ads|*-adder875*|*-ep88xc)
238 platformo=$object/cuboot-8xx.o
239 ;;
240 *5200*|*-motionpro)
241 platformo=$object/cuboot-52xx.o
242 ;;
243 *-pq2fads|*-ep8248e|*-mpc8272*|*-storcenter)
244 platformo=$object/cuboot-pq2.o
245 ;;
246 *-mpc824*)
247 platformo=$object/cuboot-824x.o
248 ;;
249 *-mpc83*|*-asp834x*)
250 platformo=$object/cuboot-83xx.o
251 ;;
252 *-tqm8541|*-mpc8560*|*-tqm8560|*-tqm8555|*-ksi8560*)
253 platformo=$object/cuboot-85xx-cpm2.o
254 ;;
255 *-mpc85*|*-tqm85*|*-sbc85*)
256 platformo=$object/cuboot-85xx.o
257 ;;
258 *-amigaone)
259 link_address='0x800000'
260 ;;
261 esac
262 ;;
263ps3)
264 platformo="$object/ps3-head.o $object/ps3-hvcall.o $object/ps3.o"
265 lds=$object/zImage.ps3.lds
266 compression=
267 ext=bin
268 objflags="-O binary --set-section-flags=.bss=contents,alloc,load,data"
269 ksection=.kernel:vmlinux.bin
270 isection=.kernel:initrd
271 link_address=''
272 make_space=n
273 pie=
274 ;;
275ep88xc|ep405|ep8248e)
276 platformo="$object/fixed-head.o $object/$platform.o"
277 binary=y
278 ;;
279adder875-redboot)
280 platformo="$object/fixed-head.o $object/redboot-8xx.o"
281 binary=y
282 ;;
283simpleboot-virtex405-*)
284 platformo="$object/virtex405-head.o $object/simpleboot.o $object/virtex.o"
285 binary=y
286 ;;
287simpleboot-virtex440-*)
288 platformo="$object/fixed-head.o $object/simpleboot.o $object/virtex.o"
289 binary=y
290 ;;
291simpleboot-*)
292 platformo="$object/fixed-head.o $object/simpleboot.o"
293 binary=y
294 ;;
295asp834x-redboot)
296 platformo="$object/fixed-head.o $object/redboot-83xx.o"
297 binary=y
298 ;;
299xpedite52*)
300 link_address='0x1400000'
301 platformo=$object/cuboot-85xx.o
302 ;;
303gamecube|wii)
304 link_address='0x600000'
305 platformo="$object/$platform-head.o $object/$platform.o"
306 ;;
307treeboot-currituck)
308 link_address='0x1000000'
309 ;;
310treeboot-akebono)
311 link_address='0x1000000'
312 ;;
313treeboot-iss4xx-mpic)
314 platformo="$object/treeboot-iss4xx.o"
315 ;;
316epapr)
317 platformo="$object/pseries-head.o $object/epapr.o $object/epapr-wrapper.o"
318 link_address='0x20000000'
319 pie=-pie
320 ;;
321mvme5100)
322 platformo="$object/fixed-head.o $object/mvme5100.o"
323 binary=y
324 ;;
325mvme7100)
326 platformo="$object/motload-head.o $object/mvme7100.o"
327 link_address='0x4000000'
328 binary=y
329 ;;
330esac
331
332vmz="$tmpdir/`basename \"$kernel\"`.$ext"
333
334# Calculate the vmlinux.strip size
335${CROSS}objcopy $objflags "$kernel" "$vmz.$$"
336strip_size=$(stat -c %s $vmz.$$)
337
338if [ -z "$cacheit" -o ! -f "$vmz$compression" -o "$vmz$compression" -ot "$kernel" ]; then
339 # recompress the image if we need to
340 case $compression in
341 .xz)
342 xz --check=crc32 -f -6 "$vmz.$$"
343 ;;
344 .gz)
345 gzip -n -f -9 "$vmz.$$"
346 ;;
347 *)
348 # drop the compression suffix so the stripped vmlinux is used
349 compression=
350 ;;
351 esac
352
353 if [ -n "$cacheit" ]; then
354 mv -f "$vmz.$$$compression" "$vmz$compression"
355 else
356 vmz="$vmz.$$"
357 fi
358else
359 rm -f $vmz.$$
360fi
361
362vmz="$vmz$compression"
363
364if [ "$make_space" = "y" ]; then
365 # Round the size to next higher MB limit
366 round_size=$(((strip_size + 0xfffff) & 0xfff00000))
367
368 round_size=0x$(printf "%x" $round_size)
369 link_addr=$(printf "%d" $link_address)
370
371 if [ $link_addr -lt $strip_size ]; then
372 echo "INFO: Uncompressed kernel (size 0x$(printf "%x\n" $strip_size))" \
373 "overlaps the address of the wrapper($link_address)"
374 echo "INFO: Fixing the link_address of wrapper to ($round_size)"
375 link_address=$round_size
376 fi
377fi
378
379# Extract kernel version information, some platforms want to include
380# it in the image header
381version=`${CROSS}strings "$kernel" | grep '^Linux version [-0-9.]' | \
382 cut -d' ' -f3`
383if [ -n "$version" ]; then
384 uboot_version="-n Linux-$version"
385fi
386
387# physical offset of kernel image
388membase=`${CROSS}objdump -p "$kernel" | grep -m 1 LOAD | awk '{print $7}'`
389
390case "$platform" in
391uboot)
392 rm -f "$ofile"
393 ${MKIMAGE} -A ppc -O linux -T kernel -C gzip -a $membase -e $membase \
394 $uboot_version -d "$vmz" "$ofile"
395 if [ -z "$cacheit" ]; then
396 rm -f "$vmz"
397 fi
398 exit 0
399 ;;
400uboot-obs600)
401 rm -f "$ofile"
402 # obs600 wants a multi image with an initrd, so we need to put a fake
403 # one in even when building a "normal" image.
404 if [ -n "$initrd" ]; then
405 real_rd="$initrd"
406 else
407 real_rd=`mktemp`
408 echo "\0" >>"$real_rd"
409 fi
410 ${MKIMAGE} -A ppc -O linux -T multi -C gzip -a $membase -e $membase \
411 $uboot_version -d "$vmz":"$real_rd":"$dtb" "$ofile"
412 if [ -z "$initrd" ]; then
413 rm -f "$real_rd"
414 fi
415 if [ -z "$cacheit" ]; then
416 rm -f "$vmz"
417 fi
418 exit 0
419 ;;
420esac
421
422addsec() {
423 ${CROSS}objcopy $4 $1 \
424 --add-section=$3="$2" \
425 --set-section-flags=$3=contents,alloc,load,readonly,data
426}
427
428addsec $tmp "$vmz" $ksection $object/empty.o
429if [ -z "$cacheit" ]; then
430 rm -f "$vmz"
431fi
432
433if [ -n "$initrd" ]; then
434 addsec $tmp "$initrd" $isection
435fi
436
437if [ -n "$dtb" ]; then
438 addsec $tmp "$dtb" .kernel:dtb
439 if [ -n "$dts" ]; then
440 rm $dtb
441 fi
442fi
443
444if [ "$platform" != "miboot" ]; then
445 if [ -n "$link_address" ] ; then
446 text_start="-Ttext $link_address"
447 fi
448#link everything
449 ${CROSS}ld -m $format -T $lds $text_start $pie -o "$ofile" \
450 $platformo $tmp $object/wrapper.a
451 rm $tmp
452fi
453
454# Some platforms need the zImage's entry point and base address
455base=0x`${CROSS}nm "$ofile" | grep ' _start$' | cut -d' ' -f1`
456entry=`${CROSS}objdump -f "$ofile" | grep '^start address ' | cut -d' ' -f3`
457
458if [ -n "$binary" ]; then
459 mv "$ofile" "$ofile".elf
460 ${CROSS}objcopy -O binary "$ofile".elf "$ofile"
461fi
462
463# post-processing needed for some platforms
464case "$platform" in
465pseries|chrp|maple)
466 $objbin/addnote "$ofile"
467 ;;
468coff)
469 ${CROSS}objcopy -O aixcoff-rs6000 --set-start "$entry" "$ofile"
470 $objbin/hack-coff "$ofile"
471 ;;
472cuboot*)
473 gzip -n -f -9 "$ofile"
474 ${MKIMAGE} -A ppc -O linux -T kernel -C gzip -a "$base" -e "$entry" \
475 $uboot_version -d "$ofile".gz "$ofile"
476 ;;
477treeboot*)
478 mv "$ofile" "$ofile.elf"
479 $objbin/mktree "$ofile.elf" "$ofile" "$base" "$entry"
480 if [ -z "$cacheit" ]; then
481 rm -f "$ofile.elf"
482 fi
483 exit 0
484 ;;
485ps3)
486 # The ps3's loader supports loading a gzipped binary image from flash
487 # rom to ram addr zero. The loader then enters the system reset
488 # vector at addr 0x100. A bootwrapper overlay is used to arrange for
489 # a binary image of the kernel to be at addr zero, and yet have a
490 # suitable bootwrapper entry at 0x100. To construct the final rom
491 # image 512 bytes from offset 0x100 is copied to the bootwrapper
492 # place holder at symbol __system_reset_kernel. The 512 bytes of the
493 # bootwrapper entry code at symbol __system_reset_overlay is then
494 # copied to offset 0x100. At runtime the bootwrapper program copies
495 # the data at __system_reset_kernel back to addr 0x100.
496
497 system_reset_overlay=0x`${CROSS}nm "$ofile" \
498 | grep ' __system_reset_overlay$' \
499 | cut -d' ' -f1`
500 system_reset_overlay=`printf "%d" $system_reset_overlay`
501 system_reset_kernel=0x`${CROSS}nm "$ofile" \
502 | grep ' __system_reset_kernel$' \
503 | cut -d' ' -f1`
504 system_reset_kernel=`printf "%d" $system_reset_kernel`
505 overlay_dest="256"
506 overlay_size="512"
507
508 ${CROSS}objcopy -O binary "$ofile" "$ofile.bin"
509
510 run_cmd dd if="$ofile.bin" of="$ofile.bin" conv=notrunc \
511 skip=$overlay_dest seek=$system_reset_kernel \
512 count=$overlay_size bs=1
513
514 run_cmd dd if="$ofile.bin" of="$ofile.bin" conv=notrunc \
515 skip=$system_reset_overlay seek=$overlay_dest \
516 count=$overlay_size bs=1
517
518 odir="$(dirname "$ofile.bin")"
519 rm -f "$odir/otheros.bld"
520 gzip -n --force -9 --stdout "$ofile.bin" > "$odir/otheros.bld"
521 ;;
522esac