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