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
42
43# cross-compilation prefix
44CROSS=
45
46# mkimage wrapper script
47MKIMAGE=$srctree/scripts/mkuboot.sh
48
49# directory for object and other files used by this script
50object=arch/powerpc/boot
51objbin=$object
52dtc=scripts/dtc/dtc
53
54# directory for working files
55tmpdir=.
56
57usage() {
58 echo 'Usage: wrapper [-o output] [-p platform] [-i initrd]' >&2
59 echo ' [-d devtree] [-s tree.dts] [-c] [-C cross-prefix]' >&2
60 echo ' [-D datadir] [-W workingdir] [--no-gzip] [vmlinux]' >&2
61 exit 1
62}
63
64while [ "$#" -gt 0 ]; do
65 case "$1" in
66 -o)
67 shift
68 [ "$#" -gt 0 ] || usage
69 ofile="$1"
70 ;;
71 -p)
72 shift
73 [ "$#" -gt 0 ] || usage
74 platform="$1"
75 ;;
76 -i)
77 shift
78 [ "$#" -gt 0 ] || usage
79 initrd="$1"
80 ;;
81 -d)
82 shift
83 [ "$#" -gt 0 ] || usage
84 dtb="$1"
85 ;;
86 -s)
87 shift
88 [ "$#" -gt 0 ] || usage
89 dts="$1"
90 ;;
91 -c)
92 cacheit=y
93 ;;
94 -C)
95 shift
96 [ "$#" -gt 0 ] || usage
97 CROSS="$1"
98 ;;
99 -D)
100 shift
101 [ "$#" -gt 0 ] || usage
102 object="$1"
103 objbin="$1"
104 ;;
105 -W)
106 shift
107 [ "$#" -gt 0 ] || usage
108 tmpdir="$1"
109 ;;
110 --no-gzip)
111 gzip=
112 ;;
113 -?)
114 usage
115 ;;
116 *)
117 [ -z "$kernel" ] || usage
118 kernel="$1"
119 ;;
120 esac
121 shift
122done
123
124if [ -n "$dts" ]; then
125 if [ ! -r "$dts" -a -r "$object/dts/$dts" ]; then
126 dts="$object/dts/$dts"
127 fi
128 if [ -z "$dtb" ]; then
129 dtb="$platform.dtb"
130 fi
131 $dtc -O dtb -o "$dtb" -b 0 "$dts"
132fi
133
134if [ -z "$kernel" ]; then
135 kernel=vmlinux
136fi
137
138platformo=$object/"$platform".o
139lds=$object/zImage.lds
140ext=strip
141objflags=-S
142tmp=$tmpdir/zImage.$$.o
143ksection=.kernel:vmlinux.strip
144isection=.kernel:initrd
145link_address='0x400000'
146
147case "$platform" in
148pseries)
149 platformo=$object/of.o
150 link_address='0x4000000'
151 ;;
152pmac|chrp)
153 platformo=$object/of.o
154 ;;
155coff)
156 platformo=$object/of.o
157 lds=$object/zImage.coff.lds
158 link_address='0x500000'
159 ;;
160miboot|uboot)
161 # miboot and U-boot want just the bare bits, not an ELF binary
162 ext=bin
163 objflags="-O binary"
164 tmp="$ofile"
165 ksection=image
166 isection=initrd
167 ;;
168cuboot*)
169 binary=y
170 gzip=
171 case "$platform" in
172 *-mpc866ads|*-mpc885ads|*-adder875*|*-ep88xc)
173 platformo=$object/cuboot-8xx.o
174 ;;
175 *5200*|*-motionpro)
176 platformo=$object/cuboot-52xx.o
177 ;;
178 *-pq2fads|*-ep8248e|*-mpc8272*|*-storcenter)
179 platformo=$object/cuboot-pq2.o
180 ;;
181 *-mpc824*)
182 platformo=$object/cuboot-824x.o
183 ;;
184 *-mpc83*|*-asp834x*)
185 platformo=$object/cuboot-83xx.o
186 ;;
187 *-tqm8541|*-mpc8560*|*-tqm8560|*-tqm8555|*-ksi8560*)
188 platformo=$object/cuboot-85xx-cpm2.o
189 ;;
190 *-mpc85*|*-tqm85*|*-sbc85*)
191 platformo=$object/cuboot-85xx.o
192 ;;
193 *-amigaone)
194 link_address='0x800000'
195 ;;
196 esac
197 ;;
198ps3)
199 platformo="$object/ps3-head.o $object/ps3-hvcall.o $object/ps3.o"
200 lds=$object/zImage.ps3.lds
201 gzip=
202 ext=bin
203 objflags="-O binary --set-section-flags=.bss=contents,alloc,load,data"
204 ksection=.kernel:vmlinux.bin
205 isection=.kernel:initrd
206 link_address=''
207 ;;
208ep88xc|ep405|ep8248e)
209 platformo="$object/fixed-head.o $object/$platform.o"
210 binary=y
211 ;;
212adder875-redboot)
213 platformo="$object/fixed-head.o $object/redboot-8xx.o"
214 binary=y
215 ;;
216simpleboot-virtex405-*)
217 platformo="$object/virtex405-head.o $object/simpleboot.o $object/virtex.o"
218 binary=y
219 ;;
220simpleboot-virtex440-*)
221 platformo="$object/fixed-head.o $object/simpleboot.o $object/virtex.o"
222 binary=y
223 ;;
224simpleboot-*)
225 platformo="$object/fixed-head.o $object/simpleboot.o"
226 binary=y
227 ;;
228asp834x-redboot)
229 platformo="$object/fixed-head.o $object/redboot-83xx.o"
230 binary=y
231 ;;
232xpedite52*)
233 link_address='0x1400000'
234 platformo=$object/cuboot-85xx.o
235 ;;
236gamecube|wii)
237 link_address='0x600000'
238 platformo="$object/$platform-head.o $object/$platform.o"
239 ;;
240esac
241
242vmz="$tmpdir/`basename \"$kernel\"`.$ext"
243if [ -z "$cacheit" -o ! -f "$vmz$gzip" -o "$vmz$gzip" -ot "$kernel" ]; then
244 ${CROSS}objcopy $objflags "$kernel" "$vmz.$$"
245
246 if [ -n "$gzip" ]; then
247 gzip -f -9 "$vmz.$$"
248 fi
249
250 if [ -n "$cacheit" ]; then
251 mv -f "$vmz.$$$gzip" "$vmz$gzip"
252 else
253 vmz="$vmz.$$"
254 fi
255fi
256
257vmz="$vmz$gzip"
258
259# Extract kernel version information, some platforms want to include
260# it in the image header
261version=`${CROSS}strings "$kernel" | grep '^Linux version [-0-9.]' | \
262 cut -d' ' -f3`
263if [ -n "$version" ]; then
264 uboot_version="-n Linux-$version"
265fi
266
267# physical offset of kernel image
268membase=`${CROSS}objdump -p "$kernel" | grep -m 1 LOAD | awk '{print $7}'`
269
270case "$platform" in
271uboot)
272 rm -f "$ofile"
273 ${MKIMAGE} -A ppc -O linux -T kernel -C gzip -a $membase -e $membase \
274 $uboot_version -d "$vmz" "$ofile"
275 if [ -z "$cacheit" ]; then
276 rm -f "$vmz"
277 fi
278 exit 0
279 ;;
280esac
281
282addsec() {
283 ${CROSS}objcopy $4 $1 \
284 --add-section=$3="$2" \
285 --set-section-flags=$3=contents,alloc,load,readonly,data
286}
287
288addsec $tmp "$vmz" $ksection $object/empty.o
289if [ -z "$cacheit" ]; then
290 rm -f "$vmz"
291fi
292
293if [ -n "$initrd" ]; then
294 addsec $tmp "$initrd" $isection
295fi
296
297if [ -n "$dtb" ]; then
298 addsec $tmp "$dtb" .kernel:dtb
299 if [ -n "$dts" ]; then
300 rm $dtb
301 fi
302fi
303
304if [ "$platform" != "miboot" ]; then
305 if [ -n "$link_address" ] ; then
306 text_start="-Ttext $link_address --defsym _start=$link_address"
307 fi
308 ${CROSS}ld -m elf32ppc -T $lds $text_start -o "$ofile" \
309 $platformo $tmp $object/wrapper.a
310 rm $tmp
311fi
312
313# Some platforms need the zImage's entry point and base address
314base=0x`${CROSS}nm "$ofile" | grep ' _start$' | cut -d' ' -f1`
315entry=`${CROSS}objdump -f "$ofile" | grep '^start address ' | cut -d' ' -f3`
316
317if [ -n "$binary" ]; then
318 mv "$ofile" "$ofile".elf
319 ${CROSS}objcopy -O binary "$ofile".elf "$ofile"
320fi
321
322# post-processing needed for some platforms
323case "$platform" in
324pseries|chrp)
325 $objbin/addnote "$ofile"
326 ;;
327coff)
328 ${CROSS}objcopy -O aixcoff-rs6000 --set-start "$entry" "$ofile"
329 $objbin/hack-coff "$ofile"
330 ;;
331cuboot*)
332 gzip -f -9 "$ofile"
333 ${MKIMAGE} -A ppc -O linux -T kernel -C gzip -a "$base" -e "$entry" \
334 $uboot_version -d "$ofile".gz "$ofile"
335 ;;
336treeboot*)
337 mv "$ofile" "$ofile.elf"
338 $objbin/mktree "$ofile.elf" "$ofile" "$base" "$entry"
339 if [ -z "$cacheit" ]; then
340 rm -f "$ofile.elf"
341 fi
342 exit 0
343 ;;
344ps3)
345 # The ps3's loader supports loading a gzipped binary image from flash
346 # rom to ram addr zero. The loader then enters the system reset
347 # vector at addr 0x100. A bootwrapper overlay is used to arrange for
348 # a binary image of the kernel to be at addr zero, and yet have a
349 # suitable bootwrapper entry at 0x100. To construct the final rom
350 # image 512 bytes from offset 0x100 is copied to the bootwrapper
351 # place holder at symbol __system_reset_kernel. The 512 bytes of the
352 # bootwrapper entry code at symbol __system_reset_overlay is then
353 # copied to offset 0x100. At runtime the bootwrapper program copies
354 # the data at __system_reset_kernel back to addr 0x100.
355
356 system_reset_overlay=0x`${CROSS}nm "$ofile" \
357 | grep ' __system_reset_overlay$' \
358 | cut -d' ' -f1`
359 system_reset_overlay=`printf "%d" $system_reset_overlay`
360 system_reset_kernel=0x`${CROSS}nm "$ofile" \
361 | grep ' __system_reset_kernel$' \
362 | cut -d' ' -f1`
363 system_reset_kernel=`printf "%d" $system_reset_kernel`
364 overlay_dest="256"
365 overlay_size="512"
366
367 ${CROSS}objcopy -O binary "$ofile" "$ofile.bin"
368
369 dd if="$ofile.bin" of="$ofile.bin" conv=notrunc \
370 skip=$overlay_dest seek=$system_reset_kernel \
371 count=$overlay_size bs=1
372
373 dd if="$ofile.bin" of="$ofile.bin" conv=notrunc \
374 skip=$system_reset_overlay seek=$overlay_dest \
375 count=$overlay_size bs=1
376
377 odir="$(dirname "$ofile.bin")"
378 rm -f "$odir/otheros.bld"
379 gzip --force -9 --stdout "$ofile.bin" > "$odir/otheros.bld"
380 ;;
381esac