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
150of)
151 platformo="$object/of.o $object/epapr.o"
152 make_space=n
153 ;;
154pseries)
155 platformo="$object/of.o $object/epapr.o"
156 link_address='0x4000000'
157 make_space=n
158 ;;
159maple)
160 platformo="$object/of.o $object/epapr.o"
161 link_address='0x400000'
162 make_space=n
163 ;;
164pmac|chrp)
165 platformo="$object/of.o $object/epapr.o"
166 make_space=n
167 ;;
168coff)
169 platformo="$object/crt0.o $object/of.o $object/epapr.o"
170 lds=$object/zImage.coff.lds
171 link_address='0x500000'
172 make_space=n
173 pie=
174 ;;
175miboot|uboot*)
176 # miboot and U-boot want just the bare bits, not an ELF binary
177 ext=bin
178 objflags="-O binary"
179 tmp="$ofile"
180 ksection=image
181 isection=initrd
182 ;;
183cuboot*)
184 binary=y
185 gzip=
186 case "$platform" in
187 *-mpc866ads|*-mpc885ads|*-adder875*|*-ep88xc)
188 platformo=$object/cuboot-8xx.o
189 ;;
190 *5200*|*-motionpro)
191 platformo=$object/cuboot-52xx.o
192 ;;
193 *-pq2fads|*-ep8248e|*-mpc8272*|*-storcenter)
194 platformo=$object/cuboot-pq2.o
195 ;;
196 *-mpc824*)
197 platformo=$object/cuboot-824x.o
198 ;;
199 *-mpc83*|*-asp834x*)
200 platformo=$object/cuboot-83xx.o
201 ;;
202 *-tqm8541|*-mpc8560*|*-tqm8560|*-tqm8555|*-ksi8560*)
203 platformo=$object/cuboot-85xx-cpm2.o
204 ;;
205 *-mpc85*|*-tqm85*|*-sbc85*)
206 platformo=$object/cuboot-85xx.o
207 ;;
208 *-amigaone)
209 link_address='0x800000'
210 ;;
211 esac
212 ;;
213ps3)
214 platformo="$object/ps3-head.o $object/ps3-hvcall.o $object/ps3.o"
215 lds=$object/zImage.ps3.lds
216 gzip=
217 ext=bin
218 objflags="-O binary --set-section-flags=.bss=contents,alloc,load,data"
219 ksection=.kernel:vmlinux.bin
220 isection=.kernel:initrd
221 link_address=''
222 make_space=n
223 pie=
224 ;;
225ep88xc|ep405|ep8248e)
226 platformo="$object/fixed-head.o $object/$platform.o"
227 binary=y
228 ;;
229adder875-redboot)
230 platformo="$object/fixed-head.o $object/redboot-8xx.o"
231 binary=y
232 ;;
233simpleboot-virtex405-*)
234 platformo="$object/virtex405-head.o $object/simpleboot.o $object/virtex.o"
235 binary=y
236 ;;
237simpleboot-virtex440-*)
238 platformo="$object/fixed-head.o $object/simpleboot.o $object/virtex.o"
239 binary=y
240 ;;
241simpleboot-*)
242 platformo="$object/fixed-head.o $object/simpleboot.o"
243 binary=y
244 ;;
245asp834x-redboot)
246 platformo="$object/fixed-head.o $object/redboot-83xx.o"
247 binary=y
248 ;;
249xpedite52*)
250 link_address='0x1400000'
251 platformo=$object/cuboot-85xx.o
252 ;;
253gamecube|wii)
254 link_address='0x600000'
255 platformo="$object/$platform-head.o $object/$platform.o"
256 ;;
257treeboot-currituck)
258 link_address='0x1000000'
259 ;;
260treeboot-iss4xx-mpic)
261 platformo="$object/treeboot-iss4xx.o"
262 ;;
263epapr)
264 platformo="$object/epapr.o $object/epapr-wrapper.o"
265 link_address='0x20000000'
266 pie=-pie
267 ;;
268esac
269
270vmz="$tmpdir/`basename \"$kernel\"`.$ext"
271if [ -z "$cacheit" -o ! -f "$vmz$gzip" -o "$vmz$gzip" -ot "$kernel" ]; then
272 ${CROSS}objcopy $objflags "$kernel" "$vmz.$$"
273
274 strip_size=$(stat -c %s $vmz.$$)
275
276 if [ -n "$gzip" ]; then
277 gzip -n -f -9 "$vmz.$$"
278 fi
279
280 if [ -n "$cacheit" ]; then
281 mv -f "$vmz.$$$gzip" "$vmz$gzip"
282 else
283 vmz="$vmz.$$"
284 fi
285else
286 # Calculate the vmlinux.strip size
287 ${CROSS}objcopy $objflags "$kernel" "$vmz.$$"
288 strip_size=$(stat -c %s $vmz.$$)
289 rm -f $vmz.$$
290fi
291
292if [ "$make_space" = "y" ]; then
293 # Round the size to next higher MB limit
294 round_size=$(((strip_size + 0xfffff) & 0xfff00000))
295
296 round_size=0x$(printf "%x" $round_size)
297 link_addr=$(printf "%d" $link_address)
298
299 if [ $link_addr -lt $strip_size ]; then
300 echo "INFO: Uncompressed kernel (size 0x$(printf "%x\n" $strip_size))" \
301 "overlaps the address of the wrapper($link_address)"
302 echo "INFO: Fixing the link_address of wrapper to ($round_size)"
303 link_address=$round_size
304 fi
305fi
306
307vmz="$vmz$gzip"
308
309# Extract kernel version information, some platforms want to include
310# it in the image header
311version=`${CROSS}strings "$kernel" | grep '^Linux version [-0-9.]' | \
312 cut -d' ' -f3`
313if [ -n "$version" ]; then
314 uboot_version="-n Linux-$version"
315fi
316
317# physical offset of kernel image
318membase=`${CROSS}objdump -p "$kernel" | grep -m 1 LOAD | awk '{print $7}'`
319
320case "$platform" in
321uboot)
322 rm -f "$ofile"
323 ${MKIMAGE} -A ppc -O linux -T kernel -C gzip -a $membase -e $membase \
324 $uboot_version -d "$vmz" "$ofile"
325 if [ -z "$cacheit" ]; then
326 rm -f "$vmz"
327 fi
328 exit 0
329 ;;
330uboot-obs600)
331 rm -f "$ofile"
332 # obs600 wants a multi image with an initrd, so we need to put a fake
333 # one in even when building a "normal" image.
334 if [ -n "$initrd" ]; then
335 real_rd="$initrd"
336 else
337 real_rd=`mktemp`
338 echo "\0" >>"$real_rd"
339 fi
340 ${MKIMAGE} -A ppc -O linux -T multi -C gzip -a $membase -e $membase \
341 $uboot_version -d "$vmz":"$real_rd":"$dtb" "$ofile"
342 if [ -z "$initrd" ]; then
343 rm -f "$real_rd"
344 fi
345 if [ -z "$cacheit" ]; then
346 rm -f "$vmz"
347 fi
348 exit 0
349 ;;
350esac
351
352addsec() {
353 ${CROSS}objcopy $4 $1 \
354 --add-section=$3="$2" \
355 --set-section-flags=$3=contents,alloc,load,readonly,data
356}
357
358addsec $tmp "$vmz" $ksection $object/empty.o
359if [ -z "$cacheit" ]; then
360 rm -f "$vmz"
361fi
362
363if [ -n "$initrd" ]; then
364 addsec $tmp "$initrd" $isection
365fi
366
367if [ -n "$dtb" ]; then
368 addsec $tmp "$dtb" .kernel:dtb
369 if [ -n "$dts" ]; then
370 rm $dtb
371 fi
372fi
373
374if [ "$platform" != "miboot" ]; then
375 if [ -n "$link_address" ] ; then
376 text_start="-Ttext $link_address"
377 fi
378 ${CROSS}ld -m elf32ppc -T $lds $text_start $pie -o "$ofile" \
379 $platformo $tmp $object/wrapper.a
380 rm $tmp
381fi
382
383# Some platforms need the zImage's entry point and base address
384base=0x`${CROSS}nm "$ofile" | grep ' _start$' | cut -d' ' -f1`
385entry=`${CROSS}objdump -f "$ofile" | grep '^start address ' | cut -d' ' -f3`
386
387if [ -n "$binary" ]; then
388 mv "$ofile" "$ofile".elf
389 ${CROSS}objcopy -O binary "$ofile".elf "$ofile"
390fi
391
392# post-processing needed for some platforms
393case "$platform" in
394pseries|chrp|maple)
395 $objbin/addnote "$ofile"
396 ;;
397coff)
398 ${CROSS}objcopy -O aixcoff-rs6000 --set-start "$entry" "$ofile"
399 $objbin/hack-coff "$ofile"
400 ;;
401cuboot*)
402 gzip -n -f -9 "$ofile"
403 ${MKIMAGE} -A ppc -O linux -T kernel -C gzip -a "$base" -e "$entry" \
404 $uboot_version -d "$ofile".gz "$ofile"
405 ;;
406treeboot*)
407 mv "$ofile" "$ofile.elf"
408 $objbin/mktree "$ofile.elf" "$ofile" "$base" "$entry"
409 if [ -z "$cacheit" ]; then
410 rm -f "$ofile.elf"
411 fi
412 exit 0
413 ;;
414ps3)
415 # The ps3's loader supports loading a gzipped binary image from flash
416 # rom to ram addr zero. The loader then enters the system reset
417 # vector at addr 0x100. A bootwrapper overlay is used to arrange for
418 # a binary image of the kernel to be at addr zero, and yet have a
419 # suitable bootwrapper entry at 0x100. To construct the final rom
420 # image 512 bytes from offset 0x100 is copied to the bootwrapper
421 # place holder at symbol __system_reset_kernel. The 512 bytes of the
422 # bootwrapper entry code at symbol __system_reset_overlay is then
423 # copied to offset 0x100. At runtime the bootwrapper program copies
424 # the data at __system_reset_kernel back to addr 0x100.
425
426 system_reset_overlay=0x`${CROSS}nm "$ofile" \
427 | grep ' __system_reset_overlay$' \
428 | cut -d' ' -f1`
429 system_reset_overlay=`printf "%d" $system_reset_overlay`
430 system_reset_kernel=0x`${CROSS}nm "$ofile" \
431 | grep ' __system_reset_kernel$' \
432 | cut -d' ' -f1`
433 system_reset_kernel=`printf "%d" $system_reset_kernel`
434 overlay_dest="256"
435 overlay_size="512"
436
437 ${CROSS}objcopy -O binary "$ofile" "$ofile.bin"
438
439 dd if="$ofile.bin" of="$ofile.bin" conv=notrunc \
440 skip=$overlay_dest seek=$system_reset_kernel \
441 count=$overlay_size bs=1
442
443 dd if="$ofile.bin" of="$ofile.bin" conv=notrunc \
444 skip=$system_reset_overlay seek=$overlay_dest \
445 count=$overlay_size bs=1
446
447 odir="$(dirname "$ofile.bin")"
448 rm -f "$odir/otheros.bld"
449 gzip -n --force -9 --stdout "$ofile.bin" > "$odir/otheros.bld"
450 ;;
451esac