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 $kernel.strip.gz (use if present & newer, else make) 18# -C prefix specify command prefix for cross-building tools 19# (strip, objcopy, ld) 20# -D dir specify directory containing data files used by script 21# (default ./arch/powerpc/boot) 22# -W dir specify working directory for temporary files (default .) 23 24# defaults 25kernel= 26ofile=zImage 27platform=of 28initrd= 29dtb= 30dts= 31cacheit= 32gzip=.gz 33 34# cross-compilation prefix 35CROSS= 36 37# directory for object and other files used by this script 38object=arch/powerpc/boot 39 40# directory for working files 41tmpdir=. 42 43usage() { 44 echo 'Usage: wrapper [-o output] [-p platform] [-i initrd]' >&2 45 echo ' [-d devtree] [-s tree.dts] [-c] [-C cross-prefix]' >&2 46 echo ' [-D datadir] [-W workingdir] [--no-gzip] [vmlinux]' >&2 47 exit 1 48} 49 50while [ "$#" -gt 0 ]; do 51 case "$1" in 52 -o) 53 shift 54 [ "$#" -gt 0 ] || usage 55 ofile="$1" 56 ;; 57 -p) 58 shift 59 [ "$#" -gt 0 ] || usage 60 platform="$1" 61 ;; 62 -i) 63 shift 64 [ "$#" -gt 0 ] || usage 65 initrd="$1" 66 ;; 67 -d) 68 shift 69 [ "$#" -gt 0 ] || usage 70 dtb="$1" 71 ;; 72 -s) 73 shift 74 [ "$#" -gt 0 ] || usage 75 dts="$1" 76 ;; 77 -c) 78 cacheit=y 79 ;; 80 -C) 81 shift 82 [ "$#" -gt 0 ] || usage 83 CROSS="$1" 84 ;; 85 -D) 86 shift 87 [ "$#" -gt 0 ] || usage 88 object="$1" 89 ;; 90 -W) 91 shift 92 [ "$#" -gt 0 ] || usage 93 tmpdir="$1" 94 ;; 95 --no-gzip) 96 gzip= 97 ;; 98 -?) 99 usage 100 ;; 101 *) 102 [ -z "$kernel" ] || usage 103 kernel="$1" 104 ;; 105 esac 106 shift 107done 108 109if [ -n "$dts" ]; then 110 if [ -z "$dtb" ]; then 111 dtb="$platform.dtb" 112 fi 113 dtc -O dtb -o "$dtb" -b 0 -V 16 "$dts" || exit 1 114fi 115 116if [ -z "$kernel" ]; then 117 kernel=vmlinux 118fi 119 120platformo=$object/"$platform".o 121lds=$object/zImage.lds 122ext=strip 123objflags=-S 124tmp=$tmpdir/zImage.$$.o 125ksection=.kernel:vmlinux.strip 126isection=.kernel:initrd 127 128case "$platform" in 129pmac|pseries|chrp) 130 platformo=$object/of.o 131 ;; 132pmaccoff) 133 platformo=$object/of.o 134 lds=$object/zImage.coff.lds 135 ;; 136miboot|uboot) 137 # miboot and U-boot want just the bare bits, not an ELF binary 138 ext=bin 139 objflags="-O binary" 140 tmp="$ofile" 141 ksection=image 142 isection=initrd 143 ;; 144cuboot*) 145 gzip= 146 ;; 147esac 148 149vmz="$tmpdir/`basename \"$kernel\"`.$ext" 150if [ -z "$cacheit" -o ! -f "$vmz$gzip" -o "$vmz$gzip" -ot "$kernel" ]; then 151 ${CROSS}objcopy $objflags "$kernel" "$vmz.$$" 152 153 if [ -n "$gzip" ]; then 154 gzip -f -9 "$vmz.$$" 155 fi 156 157 if [ -n "$cacheit" ]; then 158 mv -f "$vmz.$$$gzip" "$vmz$gzip" 159 else 160 vmz="$vmz.$$" 161 fi 162fi 163 164vmz="$vmz$gzip" 165 166# Extract kernel version information, some platforms want to include 167# it in the image header 168version=`${CROSS}strings "$kernel" | grep '^Linux version [-0-9.]' | \ 169 cut -d' ' -f3` 170if [ -n "$version" ]; then 171 uboot_version="-n Linux-$version" 172fi 173 174case "$platform" in 175uboot) 176 rm -f "$ofile" 177 mkimage -A ppc -O linux -T kernel -C gzip -a 00000000 -e 00000000 \ 178 $uboot_version -d "$vmz" "$ofile" 179 if [ -z "$cacheit" ]; then 180 rm -f "$vmz" 181 fi 182 exit 0 183 ;; 184esac 185 186addsec() { 187 ${CROSS}objcopy $4 $1 \ 188 --add-section=$3="$2" \ 189 --set-section-flags=$3=contents,alloc,load,readonly,data 190} 191 192addsec $tmp "$vmz" $ksection $object/empty.o 193if [ -z "$cacheit" ]; then 194 rm -f "$vmz" 195fi 196 197if [ -n "$initrd" ]; then 198 addsec $tmp "$initrd" $isection 199fi 200 201if [ -n "$dtb" ]; then 202 addsec $tmp "$dtb" .kernel:dtb 203 if [ -n "$dts" ]; then 204 rm $dtb 205 fi 206fi 207 208if [ "$platform" != "miboot" ]; then 209 ${CROSS}ld -m elf32ppc -T $lds -o "$ofile" \ 210 $platformo $tmp $object/wrapper.a 211 rm $tmp 212fi 213 214# Some platforms need the zImage's entry point and base address 215base=0x`${CROSS}nm "$ofile" | grep ' _start$' | cut -d' ' -f1` 216entry=`${CROSS}objdump -f "$ofile" | grep '^start address ' | cut -d' ' -f3` 217 218# post-processing needed for some platforms 219case "$platform" in 220pseries|chrp) 221 $object/addnote "$ofile" 222 ;; 223pmaccoff) 224 ${CROSS}objcopy -O aixcoff-rs6000 --set-start "$entry" "$ofile" 225 $object/hack-coff "$ofile" 226 ;; 227cuboot*) 228 mv "$ofile" "$ofile".elf 229 ${CROSS}objcopy -O binary "$ofile".elf "$ofile".bin 230 gzip -f -9 "$ofile".bin 231 mkimage -A ppc -O linux -T kernel -C gzip -a "$base" -e "$entry" \ 232 $uboot_version -d "$ofile".bin.gz "$ofile" 233 ;; 234treeboot*) 235 mv "$ofile" "$ofile.elf" 236 $object/mktree "$ofile.elf" "$ofile" "$base" "$entry" 237 if [ -z "$cacheit" ]; then 238 rm -f "$ofile.elf" 239 fi 240 exit 0 241 ;; 242esac 243