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