305 lines
6.8 KiB
Bash
Executable File
305 lines
6.8 KiB
Bash
Executable File
#!/bin/sh
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# Copyright (C) 2006 Paul Mackerras, IBM Corporation <paulus@samba.org>
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# This program may be used under the terms of version 2 of the GNU
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# General Public License.
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# This script takes a kernel binary and optionally an initrd image
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# and/or a device-tree blob, and creates a bootable zImage for a
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# given platform.
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# Options:
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# -o zImage specify output file
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# -p platform specify platform (links in $platform.o)
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# -i initrd specify initrd file
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# -d devtree specify device-tree blob
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# -s tree.dts specify device-tree source file (needs dtc installed)
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# -c cache $kernel.strip.gz (use if present & newer, else make)
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# -C prefix specify command prefix for cross-building tools
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# (strip, objcopy, ld)
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# -D dir specify directory containing data files used by script
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# (default ./arch/powerpc/boot)
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# -W dir specify working directory for temporary files (default .)
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# Stop execution if any command fails
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set -e
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# Allow for verbose output
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if [ "$V" = 1 ]; then
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set -x
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fi
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# defaults
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kernel=
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ofile=zImage
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platform=of
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initrd=
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dtb=
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dts=
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cacheit=
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binary=
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gzip=.gz
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# cross-compilation prefix
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CROSS=
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# directory for object and other files used by this script
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object=arch/powerpc/boot
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# directory for working files
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tmpdir=.
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usage() {
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echo 'Usage: wrapper [-o output] [-p platform] [-i initrd]' >&2
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echo ' [-d devtree] [-s tree.dts] [-c] [-C cross-prefix]' >&2
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echo ' [-D datadir] [-W workingdir] [--no-gzip] [vmlinux]' >&2
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exit 1
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}
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while [ "$#" -gt 0 ]; do
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case "$1" in
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-o)
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shift
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[ "$#" -gt 0 ] || usage
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ofile="$1"
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;;
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-p)
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shift
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[ "$#" -gt 0 ] || usage
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platform="$1"
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;;
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-i)
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shift
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[ "$#" -gt 0 ] || usage
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initrd="$1"
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;;
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-d)
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shift
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[ "$#" -gt 0 ] || usage
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dtb="$1"
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;;
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-s)
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shift
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[ "$#" -gt 0 ] || usage
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dts="$1"
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;;
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-c)
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cacheit=y
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;;
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-C)
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shift
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[ "$#" -gt 0 ] || usage
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CROSS="$1"
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;;
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-D)
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shift
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[ "$#" -gt 0 ] || usage
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object="$1"
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;;
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-W)
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shift
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[ "$#" -gt 0 ] || usage
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tmpdir="$1"
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;;
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--no-gzip)
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gzip=
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;;
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-?)
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usage
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;;
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*)
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[ -z "$kernel" ] || usage
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kernel="$1"
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;;
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esac
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shift
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done
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if [ -n "$dts" ]; then
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if [ -z "$dtb" ]; then
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dtb="$platform.dtb"
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fi
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dtc -O dtb -o "$dtb" -b 0 -V 16 "$dts"
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fi
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if [ -z "$kernel" ]; then
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kernel=vmlinux
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fi
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platformo=$object/"$platform".o
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lds=$object/zImage.lds
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ext=strip
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objflags=-S
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tmp=$tmpdir/zImage.$$.o
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ksection=.kernel:vmlinux.strip
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isection=.kernel:initrd
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case "$platform" in
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pmac|pseries|chrp)
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platformo=$object/of.o
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;;
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coff)
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platformo=$object/of.o
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lds=$object/zImage.coff.lds
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;;
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miboot|uboot)
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# miboot and U-boot want just the bare bits, not an ELF binary
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ext=bin
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objflags="-O binary"
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tmp="$ofile"
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ksection=image
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isection=initrd
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;;
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cuboot*)
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binary=y
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gzip=
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;;
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ps3)
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platformo="$object/ps3-head.o $object/ps3-hvcall.o $object/ps3.o"
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lds=$object/zImage.ps3.lds
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gzip=
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ext=bin
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objflags="-O binary --set-section-flags=.bss=contents,alloc,load,data"
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ksection=.kernel:vmlinux.bin
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isection=.kernel:initrd
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;;
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ep88xc)
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platformo="$object/fixed-head.o $object/$platform.o"
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binary=y
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;;
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esac
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vmz="$tmpdir/`basename \"$kernel\"`.$ext"
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if [ -z "$cacheit" -o ! -f "$vmz$gzip" -o "$vmz$gzip" -ot "$kernel" ]; then
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${CROSS}objcopy $objflags "$kernel" "$vmz.$$"
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if [ -n "$gzip" ]; then
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gzip -f -9 "$vmz.$$"
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fi
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if [ -n "$cacheit" ]; then
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mv -f "$vmz.$$$gzip" "$vmz$gzip"
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else
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vmz="$vmz.$$"
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fi
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fi
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vmz="$vmz$gzip"
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# Extract kernel version information, some platforms want to include
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# it in the image header
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version=`${CROSS}strings "$kernel" | grep '^Linux version [-0-9.]' | \
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cut -d' ' -f3`
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if [ -n "$version" ]; then
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uboot_version="-n Linux-$version"
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fi
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case "$platform" in
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uboot)
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rm -f "$ofile"
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mkimage -A ppc -O linux -T kernel -C gzip -a 00000000 -e 00000000 \
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$uboot_version -d "$vmz" "$ofile"
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if [ -z "$cacheit" ]; then
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rm -f "$vmz"
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fi
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exit 0
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;;
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esac
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addsec() {
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${CROSS}objcopy $4 $1 \
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--add-section=$3="$2" \
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--set-section-flags=$3=contents,alloc,load,readonly,data
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}
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addsec $tmp "$vmz" $ksection $object/empty.o
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if [ -z "$cacheit" ]; then
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rm -f "$vmz"
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fi
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if [ -n "$initrd" ]; then
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addsec $tmp "$initrd" $isection
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fi
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if [ -n "$dtb" ]; then
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addsec $tmp "$dtb" .kernel:dtb
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if [ -n "$dts" ]; then
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rm $dtb
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fi
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fi
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if [ "$platform" != "miboot" ]; then
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${CROSS}ld -m elf32ppc -T $lds -o "$ofile" \
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$platformo $tmp $object/wrapper.a
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rm $tmp
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fi
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# Some platforms need the zImage's entry point and base address
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base=0x`${CROSS}nm "$ofile" | grep ' _start$' | cut -d' ' -f1`
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entry=`${CROSS}objdump -f "$ofile" | grep '^start address ' | cut -d' ' -f3`
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if [ -n "$binary" ]; then
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mv "$ofile" "$ofile".elf
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${CROSS}objcopy -O binary "$ofile".elf "$ofile"
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fi
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# post-processing needed for some platforms
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case "$platform" in
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pseries|chrp)
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$object/addnote "$ofile"
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;;
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coff)
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${CROSS}objcopy -O aixcoff-rs6000 --set-start "$entry" "$ofile"
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$object/hack-coff "$ofile"
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;;
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cuboot*)
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gzip -f -9 "$ofile"
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mkimage -A ppc -O linux -T kernel -C gzip -a "$base" -e "$entry" \
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$uboot_version -d "$ofile".gz "$ofile"
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;;
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treeboot*)
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mv "$ofile" "$ofile.elf"
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$object/mktree "$ofile.elf" "$ofile" "$base" "$entry"
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if [ -z "$cacheit" ]; then
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rm -f "$ofile.elf"
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fi
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exit 0
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;;
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ps3)
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# The ps3's loader supports loading gzipped binary images from flash
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# rom to addr zero. The loader enters the image at addr 0x100. A
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# bootwrapper overlay is use to arrange for the kernel to be loaded
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# to addr zero and to have a suitable bootwrapper entry at 0x100.
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# To construct the rom image, 0x100 bytes from offset 0x100 in the
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# kernel is copied to the bootwrapper symbol __system_reset_kernel.
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# The 0x100 bytes at the bootwrapper symbol __system_reset_overlay is
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# then copied to offset 0x100. At runtime the bootwrapper program
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# copies the 0x100 bytes at __system_reset_kernel to addr 0x100.
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system_reset_overlay=0x`${CROSS}nm "$ofile" \
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| grep ' __system_reset_overlay$' \
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| cut -d' ' -f1`
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system_reset_overlay=`printf "%d" $system_reset_overlay`
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system_reset_kernel=0x`${CROSS}nm "$ofile" \
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| grep ' __system_reset_kernel$' \
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| cut -d' ' -f1`
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system_reset_kernel=`printf "%d" $system_reset_kernel`
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overlay_dest="256"
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overlay_size="256"
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rm -f "$object/otheros.bld"
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${CROSS}objcopy -O binary "$ofile" "$ofile.bin"
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dd if="$ofile.bin" of="$ofile.bin" conv=notrunc \
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skip=$overlay_dest seek=$system_reset_kernel \
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count=$overlay_size bs=1
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dd if="$ofile.bin" of="$ofile.bin" conv=notrunc \
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skip=$system_reset_overlay seek=$overlay_dest \
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count=$overlay_size bs=1
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gzip --force -9 --stdout "$ofile.bin" > "$object/otheros.bld"
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;;
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esac
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