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