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.$$.o
139ksection=.kernel:vmlinux.strip
140isection=.kernel:initrd
141
142case "$platform" in
143pmac|pseries|chrp)
144 platformo=$object/of.o
145 ;;
146coff)
147 platformo=$object/of.o
148 lds=$object/zImage.coff.lds
149 ;;
150miboot|uboot)
151 # miboot and U-boot want just the bare bits, not an ELF binary
152 ext=bin
153 objflags="-O binary"
154 tmp="$ofile"
155 ksection=image
156 isection=initrd
157 ;;
158cuboot*)
159 binary=y
160 gzip=
161 case "$platform" in
162 *-mpc885ads|*-adder875*|*-ep88xc)
163 platformo=$object/cuboot-8xx.o
164 ;;
165 *5200*|*-motionpro)
166 platformo=$object/cuboot-52xx.o
167 ;;
168 *-pq2fads|*-ep8248e|*-mpc8272*|*-storcenter)
169 platformo=$object/cuboot-pq2.o
170 ;;
171 *-mpc824*)
172 platformo=$object/cuboot-824x.o
173 ;;
174 *-mpc83*)
175 platformo=$object/cuboot-83xx.o
176 ;;
177 *-tqm8541|*-mpc8560*|*-tqm8560|*-tqm8555|*-ksi8560*)
178 platformo=$object/cuboot-85xx-cpm2.o
179 ;;
180 *-mpc85*|*-tqm8540|*-sbc85*)
181 platformo=$object/cuboot-85xx.o
182 ;;
183 esac
184 ;;
185ps3)
186 platformo="$object/ps3-head.o $object/ps3-hvcall.o $object/ps3.o"
187 lds=$object/zImage.ps3.lds
188 gzip=
189 ext=bin
190 objflags="-O binary --set-section-flags=.bss=contents,alloc,load,data"
191 ksection=.kernel:vmlinux.bin
192 isection=.kernel:initrd
193 ;;
194ep88xc|ep405|ep8248e)
195 platformo="$object/fixed-head.o $object/$platform.o"
196 binary=y
197 ;;
198adder875-redboot)
199 platformo="$object/fixed-head.o $object/redboot-8xx.o"
200 binary=y
201 ;;
202simpleboot-virtex405-*)
203 platformo="$object/virtex405-head.o $object/simpleboot.o"
204 binary=y
205 ;;
206esac
207
208vmz="$tmpdir/`basename \"$kernel\"`.$ext"
209if [ -z "$cacheit" -o ! -f "$vmz$gzip" -o "$vmz$gzip" -ot "$kernel" ]; then
210 ${CROSS}objcopy $objflags "$kernel" "$vmz.$$"
211
212 if [ -n "$gzip" ]; then
213 gzip -f -9 "$vmz.$$"
214 fi
215
216 if [ -n "$cacheit" ]; then
217 mv -f "$vmz.$$$gzip" "$vmz$gzip"
218 else
219 vmz="$vmz.$$"
220 fi
221fi
222
223vmz="$vmz$gzip"
224
225# Extract kernel version information, some platforms want to include
226# it in the image header
227version=`${CROSS}strings "$kernel" | grep '^Linux version [-0-9.]' | \
228 cut -d' ' -f3`
229if [ -n "$version" ]; then
230 uboot_version="-n Linux-$version"
231fi
232
233# physical offset of kernel image
234membase=`${CROSS}objdump -p "$kernel" | grep -m 1 LOAD | awk '{print $7}'`
235
236case "$platform" in
237uboot)
238 rm -f "$ofile"
239 mkimage -A ppc -O linux -T kernel -C gzip -a $membase -e $membase \
240 $uboot_version -d "$vmz" "$ofile"
241 if [ -z "$cacheit" ]; then
242 rm -f "$vmz"
243 fi
244 exit 0
245 ;;
246esac
247
248addsec() {
249 ${CROSS}objcopy $4 $1 \
250 --add-section=$3="$2" \
251 --set-section-flags=$3=contents,alloc,load,readonly,data
252}
253
254addsec $tmp "$vmz" $ksection $object/empty.o
255if [ -z "$cacheit" ]; then
256 rm -f "$vmz"
257fi
258
259if [ -n "$initrd" ]; then
260 addsec $tmp "$initrd" $isection
261fi
262
263if [ -n "$dtb" ]; then
264 addsec $tmp "$dtb" .kernel:dtb
265 if [ -n "$dts" ]; then
266 rm $dtb
267 fi
268fi
269
270if [ "$platform" != "miboot" ]; then
271 ${CROSS}ld -m elf32ppc -T $lds -o "$ofile" \
272 $platformo $tmp $object/wrapper.a
273 rm $tmp
274fi
275
276# Some platforms need the zImage's entry point and base address
277base=0x`${CROSS}nm "$ofile" | grep ' _start$' | cut -d' ' -f1`
278entry=`${CROSS}objdump -f "$ofile" | grep '^start address ' | cut -d' ' -f3`
279
280if [ -n "$binary" ]; then
281 mv "$ofile" "$ofile".elf
282 ${CROSS}objcopy -O binary "$ofile".elf "$ofile"
283fi
284
285# post-processing needed for some platforms
286case "$platform" in
287pseries|chrp)
288 $objbin/addnote "$ofile"
289 ;;
290coff)
291 ${CROSS}objcopy -O aixcoff-rs6000 --set-start "$entry" "$ofile"
292 $objbin/hack-coff "$ofile"
293 ;;
294cuboot*)
295 gzip -f -9 "$ofile"
296 mkimage -A ppc -O linux -T kernel -C gzip -a "$base" -e "$entry" \
297 $uboot_version -d "$ofile".gz "$ofile"
298 ;;
299treeboot*)
300 mv "$ofile" "$ofile.elf"
301 $objbin/mktree "$ofile.elf" "$ofile" "$base" "$entry"
302 if [ -z "$cacheit" ]; then
303 rm -f "$ofile.elf"
304 fi
305 exit 0
306 ;;
307ps3)
308 # The ps3's loader supports loading a gzipped binary image from flash
309 # rom to ram addr zero. The loader then enters the system reset
310 # vector at addr 0x100. A bootwrapper overlay is used to arrange for
311 # a binary image of the kernel to be at addr zero, and yet have a
312 # suitable bootwrapper entry at 0x100. To construct the final rom
313 # image 512 bytes from offset 0x100 is copied to the bootwrapper
314 # place holder at symbol __system_reset_kernel. The 512 bytes of the
315 # bootwrapper entry code at symbol __system_reset_overlay is then
316 # copied to offset 0x100. At runtime the bootwrapper program copies
317 # the data at __system_reset_kernel back to addr 0x100.
318
319 system_reset_overlay=0x`${CROSS}nm "$ofile" \
320 | grep ' __system_reset_overlay$' \
321 | cut -d' ' -f1`
322 system_reset_overlay=`printf "%d" $system_reset_overlay`
323 system_reset_kernel=0x`${CROSS}nm "$ofile" \
324 | grep ' __system_reset_kernel$' \
325 | cut -d' ' -f1`
326 system_reset_kernel=`printf "%d" $system_reset_kernel`
327 overlay_dest="256"
328 overlay_size="512"
329
330 ${CROSS}objcopy -O binary "$ofile" "$ofile.bin"
331
332 dd if="$ofile.bin" of="$ofile.bin" conv=notrunc \
333 skip=$overlay_dest seek=$system_reset_kernel \
334 count=$overlay_size bs=1
335
336 dd if="$ofile.bin" of="$ofile.bin" conv=notrunc \
337 skip=$system_reset_overlay seek=$overlay_dest \
338 count=$overlay_size bs=1
339
340 odir="$(dirname "$ofile.bin")"
341 rm -f "$odir/otheros.bld"
342 gzip --force -9 --stdout "$ofile.bin" > "$odir/otheros.bld"
343 ;;
344esac