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: $HOST_OS" 30 exit 1 31 esac 32 33 # Default number of parallel jobs during the build: cores * 2 34 JOBS=$(( $BUILD_NUM_CPUS * 2 )) 35 36 ARCH=arm 37 38 OPTION_HELP=no 39 OPTION_ARMV7=yes 40 OPTION_OUT= 41 OPTION_CROSS= 42 OPTION_ARCH= 43 OPTION_CONFIG= 44 OPTION_SAVEDEFCONFIG=no 45 OPTION_JOBS= 46 OPTION_VERBOSE= 47 CCACHE= 48 49 case "$USE_CCACHE" in 50 "") 51 CCACHE= 52 ;; 53 *) 54 # use ccache bundled in AOSP source tree 55 CCACHE=${ANDROID_BUILD_TOP:-$(dirname $0)/../../..}/prebuilts/misc/$HOST_TAG/ccache/ccache 56 [ -x $CCACHE ] || CCACHE= 57 ;; 58 esac 59 60 for opt do 61 optarg=$(expr "x$opt" : 'x[^=]*=\(.*\)') 62 case $opt in 63 --help|-h|-\?) OPTION_HELP=yes 64 ;; 65 --armv5) 66 OPTION_ARMV7=no 67 ;; 68 --armv7) 69 OPTION_ARMV7=yes 70 ;; 71 --out=*) 72 OPTION_OUT=$optarg 73 ;; 74 --cross=*) 75 OPTION_CROSS=$optarg 76 ;; 77 --arch=*) 78 OPTION_ARCH=$optarg 79 ;; 80 --config=*) 81 OPTION_CONFIG=$optarg 82 ;; 83 --savedefconfig) 84 OPTION_SAVEDEFCONFIG=yes 85 ;; 86 --ccache=*) 87 CCACHE=$optarg 88 ;; 89 --verbose) 90 OPTION_VERBOSE=true 91 ;; 92 -j*) 93 OPTION_JOBS=$optarg 94 ;; 95 *) 96 echo "unknown option '$opt', use --help" 97 exit 1 98 esac 99 done 100 101 if [ $OPTION_HELP = "yes" ] ; then 102 echo "Rebuild the prebuilt kernel binary for Android's emulator." 103 echo "" 104 echo "options (defaults are within brackets):" 105 echo "" 106 echo " --help print this message" 107 echo " --arch=<arch> change target architecture [$ARCH]" 108 echo " --armv5 build ARMv5 binaries" 109 echo " --armv7 build ARMv7 binaries (default. see note below)" 110 echo " --out=<directory> output directory [$OUTPUT]" 111 echo " --cross=<prefix> cross-toolchain prefix [$CROSSPREFIX]" 112 echo " --config=<name> kernel config name [$CONFIG]" 113 echo " --savedefconfig run savedefconfig" 114 echo " --ccache=<path> use compiler cache [${CCACHE:-not set}]" 115 echo " --verbose show build commands" 116 echo " -j<number> launch <number> parallel build jobs [$JOBS]" 117 echo "" 118 echo "NOTE: --armv7 is equivalent to --config=goldfish_armv7. It is" 119 echo " ignored if --config=<name> is used." 120 echo "" 121 exit 0 122 fi 123 124 if [ -n "$OPTION_ARCH" ]; then 125 ARCH=$OPTION_ARCH 126 fi 127 128 if [ -n "$OPTION_CONFIG" ]; then 129 CONFIG=$OPTION_CONFIG 130 else 131 if [ "$ARCH" = "arm" -a "$OPTION_ARMV7" = "yes" ]; then 132 CONFIG=goldfish_armv7 133 fi 134 echo "Auto-config: --config=$CONFIG" 135 fi 136 137 # Check that we are in the kernel directory 138 if [ ! -d arch/$ARCH/mach-$MACHINE ] ; then 139 echo "Cannot find arch/$ARCH/mach-$MACHINE. Please cd to the kernel source directory." 140 echo "Aborting." 141 #exit 1 142 fi 143 144 # Check output directory. 145 if [ -n "$OPTION_OUT" ] ; then 146 if [ ! -d "$OPTION_OUT" ] ; then 147 echo "Output directory '$OPTION_OUT' does not exist ! Aborting." 148 exit 1 149 fi 150 OUTPUT=$OPTION_OUT 151 else 152 mkdir -p $OUTPUT 153 fi 154 155 if [ -n "$OPTION_CROSS" ] ; then 156 CROSSPREFIX="$OPTION_CROSS" 157 else 158 case $ARCH in 159 arm) 160 CROSSTOOLCHAIN=arm-linux-androideabi-4.6 161 CROSSPREFIX=arm-linux-androideabi- 162 ;; 163 x86) 164 CROSSTOOLCHAIN=i686-linux-android-4.6 165 CROSSPREFIX=i686-linux-android- 166 ;; 167 mips) 168 CROSSTOOLCHAIN=mipsel-linux-android-4.6 169 CROSSPREFIX=mipsel-linux-android- 170 ;; 171 *) 172 echo "ERROR: Unsupported architecture!" 173 exit 1 174 ;; 175 esac 176 echo "Auto-config: --cross=$CROSSPREFIX" 177 fi 178 179 ZIMAGE=zImage 180 181 case $ARCH in 182 x86) 183 ZIMAGE=bzImage 184 ;; 185 mips) 186 ZIMAGE= 187 ;; 188 esac 189 190 # If the cross-compiler is not in the path, try to find it automatically 191 CROSS_COMPILER="${CROSSPREFIX}gcc" 192 CROSS_COMPILER_VERSION=$($CROSS_COMPILER --version 2>/dev/null) 193 if [ $? != 0 ] ; then 194 BUILD_TOP=$ANDROID_BUILD_TOP 195 if [ -z "$BUILD_TOP" ]; then 196 # Assume this script is under external/qemu/distrib/ in the 197 # Android source tree. 198 BUILD_TOP=$(dirname $0)/../../.. 199 if [ ! -d "$BUILD_TOP/prebuilts" ]; then 200 BUILD_TOP= 201 else 202 BUILD_TOP=$(cd $BUILD_TOP && pwd) 203 fi 204 fi 205 CROSSPREFIX=$BUILD_TOP/prebuilts/gcc/$HOST_TAG/$ARCH/$CROSSTOOLCHAIN/bin/$CROSSPREFIX 206 if [ "$BUILD_TOP" -a -f ${CROSSPREFIX}gcc ]; then 207 echo "Auto-config: --cross=$CROSSPREFIX" 208 else 209 echo "It looks like $CROSS_COMPILER is not in your path ! Aborting." 210 exit 1 211 fi 212 fi 213 214 if [ "$CCACHE" ] ; then 215 echo "Using ccache program: $CCACHE" 216 CROSSPREFIX="$CCACHE $CROSSPREFIX" 217 fi 218 219 export CROSS_COMPILE="$CROSSPREFIX" ARCH SUBARCH=$ARCH 220 221 if [ "$OPTION_JOBS" ]; then 222 JOBS=$OPTION_JOBS 223 else 224 echo "Auto-config: -j$JOBS" 225 fi 226 227 228 # Special magic redirection with our magic toolbox script 229 # This is needed to add extra compiler flags to compiler. 230 # See kernel-toolchain/android-kernel-toolchain-* for details 231 # 232 export REAL_CROSS_COMPILE="$CROSS_COMPILE" 233 CROSS_COMPILE=$(dirname "$0")/kernel-toolchain/android-kernel-toolchain- 234 235 MAKE_FLAGS= 236 if [ "$OPTION_VERBOSE" ]; then 237 MAKE_FLAGS="$MAKE_FLAGS V=1" 238 fi 239 240 # Do the build 241 # 242 rm -f include/asm && 243 make ${CONFIG}_defconfig && # configure the kernel 244 make -j$JOBS $MAKE_FLAGS # build it 245 246 if [ $? != 0 ] ; then 247 echo "Could not build the kernel. Aborting !" 248 exit 1 249 fi 250 251 if [ "$OPTION_SAVEDEFCONFIG" = "yes" ]; then 252 make savedefconfig 253 mv -f defconfig arch/$ARCH/configs/${CONFIG}_defconfig 254 fi 255 256 # Note: The exact names of the output files are important for the Android build, 257 # do not change the definitions lightly. 258 case $CONFIG in 259 vbox*) 260 OUTPUT_KERNEL=kernel-vbox 261 OUTPUT_VMLINUX=vmlinux-vbox 262 ;; 263 goldfish) 264 OUTPUT_KERNEL=kernel-qemu 265 OUTPUT_VMLINUX=vmlinux-qemu 266 ;; 267 goldfish_armv7) 268 OUTPUT_KERNEL=kernel-qemu-armv7 269 OUTPUT_VMLINUX=vmlinux-qemu-armv7 270 ;; 271 *) 272 OUTPUT_KERNEL=kernel-$CONFIG 273 OUTPUT_VMLINUX=vmlinux-$CONFIG 274 esac 275 276 cp -f vmlinux $OUTPUT/$OUTPUT_VMLINUX 277 if [ ! -z $ZIMAGE ]; then 278 cp -f arch/$ARCH/boot/$ZIMAGE $OUTPUT/$OUTPUT_KERNEL 279 else 280 cp -f vmlinux $OUTPUT/$OUTPUT_KERNEL 281 fi 282 echo "Kernel $CONFIG prebuilt images ($OUTPUT_KERNEL and $OUTPUT_VMLINUX) copied to $OUTPUT successfully !" 283 284 exit 0 285
