2 # SPDX-License-Identifier: GPL-2.0-only
4 # Copyright (C) 2006 Paul Mackerras, IBM Corporation <paulus@samba.org>
6 # This script takes a kernel binary and optionally an initrd image
7 # and/or a device-tree blob, and creates a bootable zImage for a
11 # -o zImage specify output file
12 # -p platform specify platform (links in $platform.o)
13 # -i initrd specify initrd file
14 # -d devtree specify device-tree blob
15 # -s tree.dts specify device-tree source file (needs dtc installed)
16 # -e esm_blob specify ESM blob for secure images
17 # -c cache $kernel.strip.gz (use if present & newer, else make)
18 # -C prefix specify command prefix for cross-building tools
19 # (strip, objcopy, ld)
20 # -D dir specify directory containing data files used by script
21 # (default ./arch/powerpc/boot)
22 # -W dir specify working directory for temporary files (default .)
23 # -z use gzip (legacy)
24 # -Z zsuffix compression to use (gz, xz or none)
26 # Stop execution if any command fails
31 # Allow for verbose output
34 map="-Map wrapper.map"
54 # cross-compilation prefix
57 # mkimage wrapper script
58 MKIMAGE=$srctree/scripts/mkuboot.sh
60 # directory for object and other files used by this script
61 object=arch/powerpc/boot
65 # directory for working files
69 echo 'Usage: wrapper [-o output] [-p platform] [-i initrd]' >&2
70 echo ' [-d devtree] [-s tree.dts] [-e esm_blob]' >&2
71 echo ' [-c] [-C cross-prefix] [-D datadir] [-W workingdir]' >&2
72 echo ' [-Z (gz|xz|none)] [--no-compression] [vmlinux]' >&2
85 if [ $? -ne "0" ]; then
93 while [ "$#" -gt 0 ]; do
97 [ "$#" -gt 0 ] || usage
102 [ "$#" -gt 0 ] || usage
107 [ "$#" -gt 0 ] || usage
112 [ "$#" -gt 0 ] || usage
117 [ "$#" -gt 0 ] || usage
122 [ "$#" -gt 0 ] || usage
130 [ "$#" -gt 0 ] || usage
135 [ "$#" -gt 0 ] || usage
141 [ "$#" -gt 0 ] || usage
150 [ "$#" -gt 0 ] || usage
151 [ "$1" != "gz" -o "$1" != "xz" -o "$1" != "lzma" -o "$1" != "lzo" -o "$1" != "none" ] || usage
156 if [ $compression = ".none" ]; then
160 if [ $uboot_comp = "gz" ]; then
165 # a "feature" of the wrapper script is that it can be used outside
166 # the kernel tree. So keeping this around for backwards compatibility.
174 [ -z "$kernel" ] || usage
182 if [ -n "$dts" ]; then
183 if [ ! -r "$dts" -a -r "$object/dts/$dts" ]; then
184 dts="$object/dts/$dts"
186 if [ -z "$dtb" ]; then
189 $dtc -O dtb -o "$dtb" -b 0 "$dts"
192 if [ -z "$kernel" ]; then
196 LC_ALL=C elfformat="`${CROSS}objdump -p "$kernel" | grep 'file format' | awk '{print $4}'`"
198 elf64-powerpcle) format=elf64lppc ;;
199 elf64-powerpc) format=elf32ppc ;;
200 elf32-powerpc) format=elf32ppc ;;
205 # Poached from scripts/ld-version.sh, but we don't want to call that because
206 # this script (wrapper) is distributed separately from the kernel source.
207 # Extract linker version number from stdin and turn into single number.
210 gsub(".*version ", "");
213 if( length(a[3]) == "8" )
214 # a[3] is probably a date of format yyyymmdd used for release snapshots. We
215 # can assume it to be zero as it does not signify a new version as such.
217 print a[1]*100000000 + a[2]*1000000 + a[3]*10000;
224 ${CROSS}ld -V 2>&1 | grep -q LLD
227 # Do not include PT_INTERP segment when linking pie. Non-pie linking
228 # just ignores this option.
229 LD_VERSION=$(${CROSS}ld --version | ld_version)
230 LD_NO_DL_MIN_VERSION=$(echo 2.26 | ld_version)
231 if [ "$LD_VERSION" -ge "$LD_NO_DL_MIN_VERSION" ] ; then
232 nodl="--no-dynamic-linker"
235 # suppress some warnings in recent ld versions
236 nowarn="-z noexecstack"
237 if "${CROSS}ld" -v --no-warn-rwx-segments >/dev/null 2>&1; then
238 nowarn="$nowarn --no-warn-rwx-segments"
241 platformo=$object/"$platform".o
242 lds=$object/zImage.lds
245 tmp=$tmpdir/zImage.$$.o
246 ksection=.kernel:vmlinux.strip
247 isection=.kernel:initrd
248 esection=.kernel:esm_blob
249 link_address='0x400000'
253 if [ -n "$esm_blob" -a "$platform" != "pseries" ]; then
254 echo "ESM blob not support on non-pseries platforms" >&2
260 platformo="$object/of.o $object/epapr.o"
264 platformo="$object/pseries-head.o $object/of.o $object/epapr.o"
265 link_address='0x4000000'
266 if [ "$format" != "elf32ppc" ]; then
273 platformo="$object/of.o $object/epapr.o"
277 platformo="$object/crt0.o $object/of.o $object/epapr.o"
278 lds=$object/zImage.coff.lds
279 link_address='0x500000'
284 # miboot and U-boot want just the bare bits, not an ELF binary
295 *-mpc866ads|*-mpc885ads|*-adder875*|*-ep88xc)
296 platformo=$object/cuboot-8xx.o
299 platformo=$object/cuboot-52xx.o
301 *-pq2fads|*-ep8248e|*-mpc8272*|*-storcenter)
302 platformo=$object/cuboot-pq2.o
305 platformo=$object/cuboot-824x.o
308 platformo=$object/cuboot-83xx.o
310 *-tqm8541|*-mpc8560*|*-tqm8560|*-tqm8555|*-ksi8560*)
311 platformo=$object/cuboot-85xx-cpm2.o
314 platformo=$object/cuboot-85xx.o
317 link_address='0x800000'
322 platformo="$object/ps3-head.o $object/ps3-hvcall.o $object/ps3.o"
323 lds=$object/zImage.ps3.lds
326 objflags="-O binary --set-section-flags=.bss=contents,alloc,load,data"
327 ksection=.kernel:vmlinux.bin
328 isection=.kernel:initrd
334 platformo="$object/fixed-head.o $object/$platform.o"
338 platformo="$object/fixed-head.o $object/redboot-8xx.o"
342 platformo="$object/fixed-head.o $object/simpleboot.o"
346 platformo="$object/fixed-head.o $object/redboot-83xx.o"
350 link_address='0x1400000'
351 platformo=$object/cuboot-85xx.o
354 link_address='0x600000'
355 platformo="$object/$platform-head.o $object/$platform.o"
358 link_address='0x500000'
359 platformo="$object/fixed-head.o $object/$platform.o"
363 link_address='0x1000000'
366 link_address='0x1000000'
368 treeboot-iss4xx-mpic)
369 platformo="$object/treeboot-iss4xx.o"
372 platformo="$object/pseries-head.o $object/epapr.o $object/epapr-wrapper.o"
373 link_address='0x20000000'
376 rodynamic=$(if ${CROSS}ld -V 2>&1 | grep -q LLD ; then echo "-z rodynamic"; fi)
379 platformo="$object/fixed-head.o $object/mvme5100.o"
383 platformo="$object/motload-head.o $object/mvme7100.o"
384 link_address='0x4000000'
389 vmz="$tmpdir/`basename \"$kernel\"`.$ext"
391 # Calculate the vmlinux.strip size
392 ${CROSS}objcopy $objflags "$kernel" "$vmz.$$"
393 strip_size=$(${CONFIG_SHELL} "${srctree}/scripts/file-size.sh" "$vmz.$$")
395 if [ -z "$cacheit" -o ! -f "$vmz$compression" -o "$vmz$compression" -ot "$kernel" ]; then
396 # recompress the image if we need to
399 xz --check=crc32 -f -6 "$vmz.$$"
402 gzip -n -f -9 "$vmz.$$"
405 xz --format=lzma -f -6 "$vmz.$$"
411 # drop the compression suffix so the stripped vmlinux is used
417 if [ -n "$cacheit" ]; then
418 mv -f "$vmz.$$$compression" "$vmz$compression"
426 vmz="$vmz$compression"
428 if [ "$make_space" = "y" ]; then
429 # Round the size to next higher MB limit
430 round_size=$(((strip_size + 0xfffff) & 0xfff00000))
432 round_size=0x$(printf "%x" $round_size)
433 link_addr=$(printf "%d" $link_address)
435 if [ $link_addr -lt $strip_size ]; then
436 echo "INFO: Uncompressed kernel (size 0x$(printf "%x\n" $strip_size))" \
437 "overlaps the address of the wrapper($link_address)"
438 echo "INFO: Fixing the link_address of wrapper to ($round_size)"
439 link_address=$round_size
443 # Extract kernel version information, some platforms want to include
444 # it in the image header
445 version=`${CROSS}strings "$kernel" | grep '^Linux version [-0-9.]' | \
446 head -n1 | cut -d' ' -f3`
447 if [ -n "$version" ]; then
448 uboot_version="-n Linux-$version"
451 # physical offset of kernel image
452 membase=`${CROSS}objdump -p "$kernel" | grep -m 1 LOAD | awk '{print $7}'`
457 ${MKIMAGE} -A ppc -O linux -T kernel -C $uboot_comp -a $membase -e $membase \
458 $uboot_version -d "$vmz" "$ofile"
459 if [ -z "$cacheit" ]; then
467 ${CROSS}objcopy $4 $1 \
468 --add-section=$3="$2" \
469 --set-section-flags=$3=contents,alloc,load,readonly,data
472 addsec $tmp "$vmz" $ksection $object/empty.o
473 if [ -z "$cacheit" ]; then
477 if [ -n "$initrd" ]; then
478 addsec $tmp "$initrd" $isection
481 if [ -n "$dtb" ]; then
482 addsec $tmp "$dtb" .kernel:dtb
483 if [ -n "$dts" ]; then
488 if [ -n "$esm_blob" ]; then
489 addsec $tmp "$esm_blob" $esection
492 if [ "$platform" != "miboot" ]; then
493 if [ -n "$link_address" ] ; then
494 text_start="-Ttext $link_address"
497 ${CROSS}ld -m $format -T $lds $text_start $pie $nodl $nowarn $rodynamic $notext -o "$ofile" $map \
498 $platformo $tmp $object/wrapper.a
502 # Some platforms need the zImage's entry point and base address
503 base=0x`${CROSS}nm "$ofile" | grep ' _start$' | cut -d' ' -f1`
504 entry=`${CROSS}objdump -f "$ofile" | grep '^start address ' | cut -d' ' -f3`
506 if [ -n "$binary" ]; then
507 mv "$ofile" "$ofile".elf
508 ${CROSS}objcopy -O binary "$ofile".elf "$ofile"
511 # post-processing needed for some platforms
514 $objbin/addnote "$ofile"
517 ${CROSS}objcopy -O aixcoff-rs6000 --set-start "$entry" "$ofile"
518 $objbin/hack-coff "$ofile"
521 gzip -n -f -9 "$ofile"
522 ${MKIMAGE} -A ppc -O linux -T kernel -C gzip -a "$base" -e "$entry" \
523 $uboot_version -d "$ofile".gz "$ofile"
526 mv "$ofile" "$ofile.elf"
527 $objbin/mktree "$ofile.elf" "$ofile" "$base" "$entry"
528 if [ -z "$cacheit" ]; then
534 # The ps3's loader supports loading a gzipped binary image from flash
535 # rom to ram addr zero. The loader then enters the system reset
536 # vector at addr 0x100. A bootwrapper overlay is used to arrange for
537 # a binary image of the kernel to be at addr zero, and yet have a
538 # suitable bootwrapper entry at 0x100. To construct the final rom
539 # image 512 bytes from offset 0x100 is copied to the bootwrapper
540 # place holder at symbol __system_reset_kernel. The 512 bytes of the
541 # bootwrapper entry code at symbol __system_reset_overlay is then
542 # copied to offset 0x100. At runtime the bootwrapper program copies
543 # the data at __system_reset_kernel back to addr 0x100.
545 system_reset_overlay=0x`${CROSS}nm "$ofile" \
546 | grep ' __system_reset_overlay$' \
548 system_reset_overlay=`printf "%d" $system_reset_overlay`
549 system_reset_kernel=0x`${CROSS}nm "$ofile" \
550 | grep ' __system_reset_kernel$' \
552 system_reset_kernel=`printf "%d" $system_reset_kernel`
556 ${CROSS}objcopy -O binary "$ofile" "$ofile.bin"
558 run_cmd dd if="$ofile.bin" of="$ofile.bin" conv=notrunc \
559 skip=$overlay_dest seek=$system_reset_kernel \
560 count=$overlay_size bs=1
562 run_cmd dd if="$ofile.bin" of="$ofile.bin" conv=notrunc \
563 skip=$system_reset_overlay seek=$overlay_dest \
564 count=$overlay_size bs=1
566 odir="$(dirname "$ofile.bin")"
568 # The ps3's flash loader has a size limit of 16 MiB for the uncompressed
569 # image. If a compressed image that exceeded this limit is written to
570 # flash the loader will decompress that image until the 16 MiB limit is
571 # reached, then enter the system reset vector of the partially decompressed
572 # image. No warning is issued.
573 rm -f "$odir"/{otheros,otheros-too-big}.bld
574 size=$(${CROSS}nm --no-sort --radix=d "$ofile" | grep -E ' _end$' | cut -d' ' -f1)
576 if [ $size -gt $((0x1000000)) ]; then
577 bld="otheros-too-big.bld"
579 gzip -n --force -9 --stdout "$ofile.bin" > "$odir/$bld"