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