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