1 #!/bin/sh 2 # 3 # A small script used to rebuild the Android goldfish kernel image 4 # See docs/KERNEL.TXT for usage instructions. 5 # 6 MACHINE=goldfish 7 VARIANT=goldfish 8 OUTPUT=/tmp/kernel-qemu 9 CROSSPREFIX=arm-linux-androideabi- 10 CONFIG=goldfish 11 12 # Determine the host architecture, and which default prebuilt tag we need. 13 # For the toolchain auto-detection. 14 # 15 HOST_OS=`uname -s` 16 case "$HOST_OS" in 17 Darwin) 18 HOST_OS=darwin 19 HOST_TAG=darwin-x86 20 BUILD_NUM_CPUS=$(sysctl -n hw.ncpu) 21 ;; 22 Linux) 23 # note that building 32-bit binaries on x86_64 is handled later 24 HOST_OS=linux 25 HOST_TAG=linux-x86 26 BUILD_NUM_CPUS=$(grep -c processor /proc/cpuinfo) 27 ;; 28 *) 29 echo "ERROR: Unsupported OS: $HOST_OS" 30 exit 1 31 esac 32 33 # Default number of parallel jobs during the build: cores * 2 34 JOBS=$(( $BUILD_NUM_CPUS * 2 )) 35 36 ARCH=arm 37 38 OPTION_HELP=no 39 OPTION_ARMV7=no 40 OPTION_OUT= 41 OPTION_CROSS= 42 OPTION_ARCH= 43 OPTION_CONFIG= 44 OPTION_JOBS= 45 46 for opt do 47 optarg=$(expr "x$opt" : 'x[^=]*=\(.*\)') 48 case $opt in 49 --help|-h|-\?) OPTION_HELP=yes 50 ;; 51 --armv7) 52 OPTION_ARMV7=yes 53 ;; 54 --out=*) 55 OPTION_OUT=$optarg 56 ;; 57 --cross=*) 58 OPTION_CROSS=$optarg 59 ;; 60 --arch=*) 61 OPTION_ARCH=$optarg 62 ;; 63 --config=*) 64 OPTION_CONFIG=$optarg 65 ;; 66 -j*) 67 OPTION_JOBS=$optarg 68 ;; 69 *) 70 echo "unknown option '$opt', use --help" 71 exit 1 72 esac 73 done 74 75 if [ $OPTION_HELP = "yes" ] ; then 76 echo "Rebuild the prebuilt kernel binary for Android's emulator." 77 echo "" 78 echo "options (defaults are within brackets):" 79 echo "" 80 echo " --help print this message" 81 echo " --arch=<arch> change target architecture [$ARCH]" 82 echo " --armv7 build ARMv7 binaries (see note below)" 83 echo " --out=<directory> output directory [$OUTPUT]" 84 echo " --cross=<prefix> cross-toolchain prefix [$CROSSPREFIX]" 85 echo " --config=<name> kernel config name [$CONFIG]" 86 echo " -j<number> launch <number> parallel build jobs [$JOBS]" 87 echo "" 88 echo "NOTE: --armv7 is equivalent to --config=goldfish_armv7. It is" 89 echo " ignored if --config=<name> is used." 90 echo "" 91 exit 0 92 fi 93 94 if [ -n "$OPTION_ARCH" ]; then 95 ARCH=$OPTION_ARCH 96 fi 97 98 if [ -n "$OPTION_CONFIG" ]; then 99 CONFIG=$OPTION_CONFIG 100 else 101 if [ "$OPTION_ARMV7" = "yes" ]; then 102 CONFIG=goldfish_armv7 103 fi 104 echo "Auto-config: --config=$CONFIG" 105 fi 106 107 # Check that we are in the kernel directory 108 if [ ! -d arch/$ARCH/mach-$MACHINE ] ; then 109 echo "Cannot find arch/$ARCH/mach-$MACHINE. Please cd to the kernel source directory." 110 echo "Aborting." 111 #exit 1 112 fi 113 114 # Check output directory. 115 if [ -n "$OPTION_OUT" ] ; then 116 if [ ! -d "$OPTION_OUT" ] ; then 117 echo "Output directory '$OPTION_OUT' does not exist ! Aborting." 118 exit 1 119 fi 120 OUTPUT=$OPTION_OUT 121 else 122 mkdir -p $OUTPUT 123 fi 124 125 if [ -n "$OPTION_CROSS" ] ; then 126 CROSSPREFIX="$OPTION_CROSS" 127 else 128 case $ARCH in 129 arm) 130 CROSSTOOLCHAIN=arm-linux-androideabi-4.6 131 CROSSPREFIX=arm-linux-androideabi- 132 ;; 133 x86) 134 CROSSTOOLCHAIN=i686-linux-android-4.6 135 CROSSPREFIX=i686-linux-android- 136 ;; 137 mips) 138 CROSSTOOLCHAIN=mipsel-linux-android-4.6 139 CROSSPREFIX=mipsel-linux-android- 140 ;; 141 *) 142 echo "ERROR: Unsupported architecture!" 143 exit 1 144 ;; 145 esac 146 echo "Auto-config: --cross=$CROSSPREFIX" 147 fi 148 149 ZIMAGE=zImage 150 151 case $ARCH in 152 x86) 153 ZIMAGE=bzImage 154 ;; 155 mips) 156 ZIMAGE= 157 ;; 158 esac 159 160 # If the cross-compiler is not in the path, try to find it automatically 161 CROSS_COMPILER="${CROSSPREFIX}gcc" 162 CROSS_COMPILER_VERSION=$($CROSS_COMPILER --version 2>/dev/null) 163 if [ $? != 0 ] ; then 164 BUILD_TOP=$ANDROID_BUILD_TOP 165 if [ -z "$BUILD_TOP" ]; then 166 # Assume this script is under external/qemu/distrib/ in the 167 # Android source tree. 168 BUILD_TOP=$(dirname $0)/../../.. 169 if [ ! -d "$BUILD_TOP/prebuilts" ]; then 170 BUILD_TOP= 171 else 172 BUILD_TOP=$(cd $BUILD_TOP && pwd) 173 fi 174 fi 175 CROSSPREFIX=$BUILD_TOP/prebuilts/gcc/$HOST_TAG/$ARCH/$CROSSTOOLCHAIN/bin/$CROSSPREFIX 176 if [ "$BUILD_TOP" -a -f ${CROSSPREFIX}gcc ]; then 177 echo "Auto-config: --cross=$CROSSPREFIX" 178 else 179 echo "It looks like $CROSS_COMPILER is not in your path ! Aborting." 180 exit 1 181 fi 182 fi 183 184 export CROSS_COMPILE="$CROSSPREFIX" ARCH SUBARCH=$ARCH 185 186 if [ "$OPTION_JOBS" ]; then 187 JOBS=$OPTION_JOBS 188 else 189 echo "Auto-config: -j$JOBS" 190 fi 191 192 193 # Special magic redirection with our magic toolbox script 194 # This is needed to add extra compiler flags to compiler. 195 # See kernel-toolchain/android-kernel-toolchain-* for details 196 # 197 export REAL_CROSS_COMPILE="$CROSS_COMPILE" 198 CROSS_COMPILE=$(dirname "$0")/kernel-toolchain/android-kernel-toolchain- 199 200 # Do the build 201 # 202 rm -f include/asm && 203 make ${CONFIG}_defconfig && # configure the kernel 204 make -j$JOBS # build it 205 206 if [ $? != 0 ] ; then 207 echo "Could not build the kernel. Aborting !" 208 exit 1 209 fi 210 211 # Note: The exact names of the output files are important for the Android build, 212 # do not change the definitions lightly. 213 case $CONFIG in 214 vbox*) 215 OUTPUT_KERNEL=kernel-vbox 216 OUTPUT_VMLINUX=vmlinux-vbox 217 ;; 218 goldfish) 219 OUTPUT_KERNEL=kernel-qemu 220 OUTPUT_VMLINUX=vmlinux-qemu 221 ;; 222 goldfish_armv7) 223 OUTPUT_KERNEL=kernel-qemu-armv7 224 OUTPUT_VMLINUX=vmlinux-qemu-armv7 225 ;; 226 *) 227 OUTPUT_KERNEL=kernel-$CONFIG 228 OUTPUT_VMLINUX=vmlinux-$CONFIG 229 esac 230 231 cp -f vmlinux $OUTPUT/$OUTPUT_VMLINUX 232 if [ ! -z $ZIMAGE ]; then 233 cp -f arch/$ARCH/boot/$ZIMAGE $OUTPUT/$OUTPUT_KERNEL 234 else 235 cp -f vmlinux $OUTPUT/$OUTPUT_KERNEL 236 fi 237 echo "Kernel $CONFIG prebuilt images ($OUTPUT_KERNEL and $OUTPUT_VMLINUX) copied to $OUTPUT successfully !" 238 239 exit 0 240
