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'
147
148case "$platform" in
149pseries)
150 platformo=$object/of.o
151 link_address='0x4000000'
152 ;;
153maple)
154 platformo=$object/of.o
155 link_address='0x400000'
156 ;;
157pmac|chrp)
158 platformo=$object/of.o
159 ;;
160coff)
161 platformo="$object/crt0.o $object/of.o"
162 lds=$object/zImage.coff.lds
163 link_address='0x500000'
164 pie=
165 ;;
166miboot|uboot*)
167 # miboot and U-boot want just the bare bits, not an ELF binary
168 ext=bin
169 objflags="-O binary"
170 tmp="$ofile"
171 ksection=image
172 isection=initrd
173 ;;
174cuboot*)
175 binary=y
176 gzip=
177 case "$platform" in
178 *-mpc866ads|*-mpc885ads|*-adder875*|*-ep88xc)
179 platformo=$object/cuboot-8xx.o
180 ;;
181 *5200*|*-motionpro)
182 platformo=$object/cuboot-52xx.o
183 ;;
184 *-pq2fads|*-ep8248e|*-mpc8272*|*-storcenter)
185 platformo=$object/cuboot-pq2.o
186 ;;
187 *-mpc824*)
188 platformo=$object/cuboot-824x.o
189 ;;
190 *-mpc83*|*-asp834x*)
191 platformo=$object/cuboot-83xx.o
192 ;;
193 *-tqm8541|*-mpc8560*|*-tqm8560|*-tqm8555|*-ksi8560*)
194 platformo=$object/cuboot-85xx-cpm2.o
195 ;;
196 *-mpc85*|*-tqm85*|*-sbc85*)
197 platformo=$object/cuboot-85xx.o
198 ;;
199 *-amigaone)
200 link_address='0x800000'
201 ;;
202 esac
203 ;;
204ps3)
205 platformo="$object/ps3-head.o $object/ps3-hvcall.o $object/ps3.o"
206 lds=$object/zImage.ps3.lds
207 gzip=
208 ext=bin
209 objflags="-O binary --set-section-flags=.bss=contents,alloc,load,data"
210 ksection=.kernel:vmlinux.bin
211 isection=.kernel:initrd
212 link_address=''
213 pie=
214 ;;
215ep88xc|ep405|ep8248e)
216 platformo="$object/fixed-head.o $object/$platform.o"
217 binary=y
218 ;;
219adder875-redboot)
220 platformo="$object/fixed-head.o $object/redboot-8xx.o"
221 binary=y
222 ;;
223simpleboot-virtex405-*)
224 platformo="$object/virtex405-head.o $object/simpleboot.o $object/virtex.o"
225 binary=y
226 ;;
227simpleboot-virtex440-*)
228 platformo="$object/fixed-head.o $object/simpleboot.o $object/virtex.o"
229 binary=y
230 ;;
231simpleboot-*)
232 platformo="$object/fixed-head.o $object/simpleboot.o"
233 binary=y
234 ;;
235asp834x-redboot)
236 platformo="$object/fixed-head.o $object/redboot-83xx.o"
237 binary=y
238 ;;
239xpedite52*)
240 link_address='0x1400000'
241 platformo=$object/cuboot-85xx.o
242 ;;
243gamecube|wii)
244 link_address='0x600000'
245 platformo="$object/$platform-head.o $object/$platform.o"
246 ;;
247treeboot-currituck)
248 link_address='0x1000000'
249 ;;
250treeboot-iss4xx-mpic)
251 platformo="$object/treeboot-iss4xx.o"
252 ;;
253epapr)
254 link_address='0x20000000'
255 pie=-pie
256 ;;
257esac
258
259vmz="$tmpdir/`basename \"$kernel\"`.$ext"
260if [ -z "$cacheit" -o ! -f "$vmz$gzip" -o "$vmz$gzip" -ot "$kernel" ]; then
261 ${CROSS}objcopy $objflags "$kernel" "$vmz.$$"
262
263 strip_size=$(stat -c %s $vmz.$$)
264
265 if [ -n "$gzip" ]; then
266 gzip -n -f -9 "$vmz.$$"
267 fi
268
269 if [ -n "$cacheit" ]; then
270 mv -f "$vmz.$$$gzip" "$vmz$gzip"
271 else
272 vmz="$vmz.$$"
273 fi
274else
275 # Calculate the vmlinux.strip size
276 ${CROSS}objcopy $objflags "$kernel" "$vmz.$$"
277 strip_size=$(stat -c %s $vmz.$$)
278 rm -f $vmz.$$
279fi
280
281# Round the size to next higher MB limit
282round_size=$(((strip_size + 0xfffff) & 0xfff00000))
283
284round_size=0x$(printf "%x" $round_size)
285link_addr=$(printf "%d" $link_address)
286
287if [ $link_addr -lt $strip_size ]; then
288 echo "INFO: Uncompressed kernel (size 0x$(printf "%x\n" $strip_size))" \
289 "overlaps the address of the wrapper($link_address)"
290 echo "INFO: Fixing the link_address of wrapper to ($round_size)"
291 link_address=$round_size
292fi
293
294vmz="$vmz$gzip"
295
296# Extract kernel version information, some platforms want to include
297# it in the image header
298version=`${CROSS}strings "$kernel" | grep '^Linux version [-0-9.]' | \
299 cut -d' ' -f3`
300if [ -n "$version" ]; then
301 uboot_version="-n Linux-$version"
302fi
303
304# physical offset of kernel image
305membase=`${CROSS}objdump -p "$kernel" | grep -m 1 LOAD | awk '{print $7}'`
306
307case "$platform" in
308uboot)
309 rm -f "$ofile"
310 ${MKIMAGE} -A ppc -O linux -T kernel -C gzip -a $membase -e $membase \
311 $uboot_version -d "$vmz" "$ofile"
312 if [ -z "$cacheit" ]; then
313 rm -f "$vmz"
314 fi
315 exit 0
316 ;;
317uboot-obs600)
318 rm -f "$ofile"
319 # obs600 wants a multi image with an initrd, so we need to put a fake
320 # one in even when building a "normal" image.
321 if [ -n "$initrd" ]; then
322 real_rd="$initrd"
323 else
324 real_rd=`mktemp`
325 echo "\0" >>"$real_rd"
326 fi
327 ${MKIMAGE} -A ppc -O linux -T multi -C gzip -a $membase -e $membase \
328 $uboot_version -d "$vmz":"$real_rd":"$dtb" "$ofile"
329 if [ -z "$initrd" ]; then
330 rm -f "$real_rd"
331 fi
332 if [ -z "$cacheit" ]; then
333 rm -f "$vmz"
334 fi
335 exit 0
336 ;;
337esac
338
339addsec() {
340 ${CROSS}objcopy $4 $1 \
341 --add-section=$3="$2" \
342 --set-section-flags=$3=contents,alloc,load,readonly,data
343}
344
345addsec $tmp "$vmz" $ksection $object/empty.o
346if [ -z "$cacheit" ]; then
347 rm -f "$vmz"
348fi
349
350if [ -n "$initrd" ]; then
351 addsec $tmp "$initrd" $isection
352fi
353
354if [ -n "$dtb" ]; then
355 addsec $tmp "$dtb" .kernel:dtb
356 if [ -n "$dts" ]; then
357 rm $dtb
358 fi
359fi
360
361if [ "$platform" != "miboot" ]; then
362 if [ -n "$link_address" ] ; then
363 text_start="-Ttext $link_address"
364 fi
365 ${CROSS}ld -m elf32ppc -T $lds $text_start $pie -o "$ofile" \
366 $platformo $tmp $object/wrapper.a
367 rm $tmp
368fi
369
370# Some platforms need the zImage's entry point and base address
371base=0x`${CROSS}nm "$ofile" | grep ' _start$' | cut -d' ' -f1`
372entry=`${CROSS}objdump -f "$ofile" | grep '^start address ' | cut -d' ' -f3`
373
374if [ -n "$binary" ]; then
375 mv "$ofile" "$ofile".elf
376 ${CROSS}objcopy -O binary "$ofile".elf "$ofile"
377fi
378
379# post-processing needed for some platforms
380case "$platform" in
381pseries|chrp|maple)
382 $objbin/addnote "$ofile"
383 ;;
384coff)
385 ${CROSS}objcopy -O aixcoff-rs6000 --set-start "$entry" "$ofile"
386 $objbin/hack-coff "$ofile"
387 ;;
388cuboot*)
389 gzip -n -f -9 "$ofile"
390 ${MKIMAGE} -A ppc -O linux -T kernel -C gzip -a "$base" -e "$entry" \
391 $uboot_version -d "$ofile".gz "$ofile"
392 ;;
393treeboot*)
394 mv "$ofile" "$ofile.elf"
395 $objbin/mktree "$ofile.elf" "$ofile" "$base" "$entry"
396 if [ -z "$cacheit" ]; then
397 rm -f "$ofile.elf"
398 fi
399 exit 0
400 ;;
401ps3)
402 # The ps3's loader supports loading a gzipped binary image from flash
403 # rom to ram addr zero. The loader then enters the system reset
404 # vector at addr 0x100. A bootwrapper overlay is used to arrange for
405 # a binary image of the kernel to be at addr zero, and yet have a
406 # suitable bootwrapper entry at 0x100. To construct the final rom
407 # image 512 bytes from offset 0x100 is copied to the bootwrapper
408 # place holder at symbol __system_reset_kernel. The 512 bytes of the
409 # bootwrapper entry code at symbol __system_reset_overlay is then
410 # copied to offset 0x100. At runtime the bootwrapper program copies
411 # the data at __system_reset_kernel back to addr 0x100.
412
413 system_reset_overlay=0x`${CROSS}nm "$ofile" \
414 | grep ' __system_reset_overlay$' \
415 | cut -d' ' -f1`
416 system_reset_overlay=`printf "%d" $system_reset_overlay`
417 system_reset_kernel=0x`${CROSS}nm "$ofile" \
418 | grep ' __system_reset_kernel$' \
419 | cut -d' ' -f1`
420 system_reset_kernel=`printf "%d" $system_reset_kernel`
421 overlay_dest="256"
422 overlay_size="512"
423
424 ${CROSS}objcopy -O binary "$ofile" "$ofile.bin"
425
426 dd if="$ofile.bin" of="$ofile.bin" conv=notrunc \
427 skip=$overlay_dest seek=$system_reset_kernel \
428 count=$overlay_size bs=1
429
430 dd if="$ofile.bin" of="$ofile.bin" conv=notrunc \
431 skip=$system_reset_overlay seek=$overlay_dest \
432 count=$overlay_size bs=1
433
434 odir="$(dirname "$ofile.bin")"
435 rm -f "$odir/otheros.bld"
436 gzip -n --force -9 --stdout "$ofile.bin" > "$odir/otheros.bld"
437 ;;
438esac