scripts/lttng-modules/param-build.sh

   1 #!/bin/sh -exu
   2 #
   3 # Copyright (C) 2016 - Michael Jeanson <mjeanson@efficios.com>
   4 #
   5 # This program is free software: you can redistribute it and/or modify
   6 # it under the terms of the GNU General Public License as published by
   7 # the Free Software Foundation, either version 3 of the License, or
   8 # (at your option) any later version.
   9 #
  10 # This program is distributed in the hope that it will be useful,
  11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 # GNU General Public License for more details.
  14 #
  15 # You should have received a copy of the GNU General Public License
  16 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17
  18 ## FUNCTIONS ##
  19
  20 # Kernel version compare functions
  21 verlte() {
  22     [  "$1" = "`printf '%s\n%s' $1 $2 | sort -V | head -n1`" ]
  23 }
  24
  25 verlt() {
  26     [ "$1" = "$2" ] && return 1 || verlte $1 $2
  27 }
  28
  29 vergte() {
  30     [  "$1" = "`printf '%s\n%s' $1 $2 | sort -V | tail -n1`" ]
  31 }
  32
  33 vergt() {
  34     [ "$1" = "$2" ] && return 1 || vergte $1 $2
  35 }
  36
  37
  38 prepare_lnx_sources() {
  39
  40     outdir=$1
  41
  42     if [ "$outdir" = "." ]; then
  43       koutput=""
  44     else
  45       koutput="O=\"${outdir}\""
  46     fi
  47
  48     # Generate kernel configuration
  49     case "$kversion" in
  50       Ubuntu*)
  51         fakeroot debian/rules clean
  52         fakeroot debian/rules genconfigs
  53         cp CONFIGS/${ubuntu_config} "${outdir}"/.config
  54         ;;
  55       *)
  56         # Que sera sera
  57         make ${koutput} allyesconfig CC=$CC
  58         ;;
  59     esac
  60
  61     # GCC 4.8
  62     sed -i "s/CONFIG_CC_STACKPROTECTOR_STRONG=y/# CONFIG_CC_STACKPROTECTOR_STRONG is not set/g" "${outdir}"/.config
  63
  64     # Don't try to sign modules
  65     sed -i "s/CONFIG_MODULE_SIG=y/# CONFIG_MODULE_SIG is not set/g" "${outdir}"/.config
  66
  67     # Disable kernel stack frame correctness validation, introduced in 4.6.0 and currently fails
  68     sed -i "s/CONFIG_STACK_VALIDATION=y/# CONFIG_STACK_VALIDATION is not set/g" "${outdir}"/.config
  69
  70     # Enable CONFIG_KALLSYMS_ALL
  71     echo "CONFIG_KPROBES=y" >> "${outdir}"/.config
  72     echo "CONFIG_FTRACE=y" >> "${outdir}"/.config
  73     echo "CONFIG_BLK_DEV_IO_TRACE=y" >> "${outdir}"/.config
  74     echo "CONFIG_TRACEPOINTS=y" >> "${outdir}"/.config
  75     echo "CONFIG_KALLSYMS_ALL=y" >> "${outdir}"/.config
  76
  77
  78     make ${koutput} silentoldconfig CC=$CC
  79     make ${koutput} modules_prepare CC=$CC
  80
  81     # Version specific tasks
  82     case "$kversion" in
  83       Ubuntu*)
  84         # Add Ubuntu ABI number to kernel headers, this is normally done by the packaging code
  85         ABINUM=$(echo $kversion | grep -P -o 'Ubuntu-(lts-)?.*-\K\d+(?=\..*)')
  86         echo "#define UTS_UBUNTU_RELEASE_ABI $ABINUM" >> ${outdir}/include/generated/utsrelease.h
  87         ;;
  88     esac
  89
  90     # On powerpc this object is required to link modules
  91     if [ "${karch}" = "powerpc" ]; then
  92         make ${koutput} arch/powerpc/lib/crtsavres.o CC=$CC
  93     fi
  94 }
  95
  96
  97
  98 build_modules() {
  99
 100     kdir="$1"
 101     bdir="$2"
 102
 103     # Get kernel version from source tree
 104     cd "${kdir}"
 105     kversion=$(make kernelversion)
 106
 107     # Enter lttng-modules source dir
 108     cd "${LTTSRCDIR}"
 109
 110     # kernels 3.10 to 3.10.13 and 3.11 to 3.11.2 introduce a deadlock in the
 111     # timekeeping subsystem. We want those build to fail.
 112     if { vergte "$kversion" "3.10" && verlte "$kversion" "3.10.13"; } || \
 113        { vergte "$kversion" "3.11" && verlte "$kversion" "3.11.2"; }; then
 114
 115         set +e
 116
 117         # Build modules
 118         KERNELDIR="${kdir}" make -j${NPROC} V=1 CC=$CC
 119
 120         # We expect this build to fail, if it doesn't, fail the job.
 121         if [ "$?" -eq 0 ]; then
 122             exit 1
 123         fi
 124
 125         # We have to publish at least one file or the build will fail
 126         echo "This kernel is broken, there is a deadlock in the timekeeping subsystem." > "${bdir}/BROKEN.txt.ko"
 127
 128         set -e
 129
 130         KERNELDIR="${kdir}" make clean CC=$CC
 131
 132     else # Regular build
 133
 134         # Build modules against full kernel sources
 135         KERNELDIR="${kdir}" make -j${NPROC} V=1 CC=$CC
 136
 137         # Install modules to build dir
 138         KERNELDIR="${kdir}" make INSTALL_MOD_PATH="${bdir}" modules_install CC=$CC
 139
 140         # Clean build dir
 141         KERNELDIR="${kdir}" make clean CC=$CC
 142     fi
 143 }
 144
 145
 146 ## MAIN ##
 147
 148 # Use gcc 4.9, older kernel don't build with gcc 5
 149 export CC=gcc-4.9
 150
 151 # Use all CPU cores
 152 NPROC=$(nproc)
 153
 154 LTTSRCDIR="${WORKSPACE}/src/lttng-modules"
 155 LNXSRCDIR="${WORKSPACE}/src/linux"
 156
 157 LNXBUILDDIR="${WORKSPACE}/build/linux"
 158 LNXHDRDIR="${WORKSPACE}/build/linux-headers"
 159
 160 LTTBUILDKSRCDIR="${WORKSPACE}/build/lttng-modules-ksrc"
 161 LTTBUILDKHDRDIR="${WORKSPACE}/build/lttng-modules-khdr"
 162
 163
 164 # Setup cross compile env if available
 165 if [ "x${cross_arch:-}" != "x" ]; then
 166
 167     case "$cross_arch" in
 168         "armhf")
 169             karch="arm"
 170             cross_compile="arm-linux-gnueabihf-"
 171             ubuntu_config="armhf-config.flavour.generic"
 172             ;;
 173
 174         "arm64")
 175             karch="arm64"
 176             cross_compile="aarch64-linux-gnu-"
 177             ubuntu_config="arm64-config.flavour.generic"
 178             ;;
 179
 180         "powerpc")
 181             karch="powerpc"
 182             cross_compile="powerpc-linux-gnu-"
 183             ubuntu_config="powerpc-config.flavour.powerpc-smp"
 184             ;;
 185
 186         "ppc64el")
 187             karch="powerpc"
 188             cross_compile="powerpc64le-linux-gnu-"
 189             ubuntu_config="ppc64el-config.flavour.generic"
 190             ;;
 191
 192         *)
 193             echo "Unsupported cross arch $arch"
 194             exit 1
 195             ;;
 196     esac
 197
 198     # Export variables used by Kbuild for cross compilation
 199     export ARCH="${karch}"
 200     export CROSS_COMPILE="${cross_compile}"
 201
 202
 203 # Set arch specific values if we are not cross compiling
 204 elif [ "x${arch:-}" != "x" ]; then
 205     case "$arch" in
 206         "x86-32")
 207             karch="x86"
 208             ubuntu_config="i386-config.flavour.generic"
 209             ;;
 210
 211         "x86-64")
 212             karch="x86"
 213             ubuntu_config="amd64-config.flavour.generic"
 214             ;;
 215
 216         "armhf")
 217             karch="arm"
 218             ubuntu_config="armhf-config.flavour.generic"
 219             ;;
 220
 221         "arm64")
 222             karch="arm64"
 223             ubuntu_config="arm64-config.flavour.generic"
 224             ;;
 225
 226         "powerpc")
 227             karch="powerpc"
 228             ubuntu_config="powerpc-config.flavour.powerpc-smp"
 229             ;;
 230
 231         "ppc64el")
 232             karch="powerpc"
 233             ubuntu_config="ppc64el-config.flavour.generic"
 234             ;;
 235
 236         *)
 237             echo "Unsupported arch $arch"
 238             exit 1
 239             ;;
 240     esac
 241 else
 242     echo "Not arch or cross_arch specified"
 243     exit 1
 244 fi
 245
 246
 247
 248
 249 # Create build directories
 250 mkdir -p "${LNXBUILDDIR}" "${LNXHDRDIR}" "${LTTBUILDKSRCDIR}" "${LTTBUILDKHDRDIR}"
 251
 252
 253
 254 ## PREPARE DISTRO STYLE KERNEL HEADERS / DEVEL
 255
 256 # Enter linux source dir
 257 cd "${LNXSRCDIR}"
 258
 259 prepare_lnx_sources "."
 260
 261 # For RT kernels, copy version file
 262 if [ -s localversion-rt ]; then
 263     cp -a localversion-rt "${LNXHDRDIR}"
 264 fi
 265
 266 # Copy all Makefile related stuff
 267 find . -path './include/*' -prune \
 268     -o -path './scripts/*' -prune -o -type f \
 269         \( -name 'Makefile*' -o -name 'Kconfig*' -o -name 'Kbuild*' -o \
 270         -name '*.sh' -o -name '*.pl' -o -name '*.lds' \) \
 271     -print | cpio -pd --preserve-modification-time "${LNXHDRDIR}"
 272
 273 # Copy base scripts and include dirs
 274 cp -a scripts include "${LNXHDRDIR}"
 275
 276 # Copy arch includes
 277 (find arch -name include -type d -print | \
 278     xargs -n1 -i: find : -type f) | \
 279         cpio -pd --preserve-modification-time "${LNXHDRDIR}"
 280
 281 # Copy arch scripts
 282 (find arch -name scripts -type d -print | \
 283     xargs -n1 -i: find : -type f) | \
 284         cpio -pd --preserve-modification-time "${LNXHDRDIR}"
 285
 286 # Cleanup scripts
 287 rm -f "${LNXHDRDIR}/scripts/*.o"
 288 rm -f "${LNXHDRDIR}/scripts/*/*.o"
 289
 290 # On powerpc this object is required to link modules
 291 if [ "${karch}" = "powerpc" ]; then
 292     cp -a --parents arch/powerpc/lib/crtsavres.[So] "${LNXHDRDIR}/"
 293 fi
 294
 295 # Copy modules related stuff, if available
 296 if [ -s Module.symvers ]; then
 297     cp Module.symvers "${LNXHDRDIR}"
 298 fi
 299
 300 if [ -s System.map ]; then
 301     cp System.map "${LNXHDRDIR}"
 302 fi
 303
 304 if [ -s Module.markers ]; then
 305     cp Module.markers "${LNXHDRDIR}"
 306 fi
 307
 308 # Copy config file
 309 cp .config "${LNXHDRDIR}"
 310
 311 # Make sure the Makefile and version.h have a matching timestamp so that
 312 # external modules can be built
 313 if [ -s "${LNXHDRDIR}/include/generated/uapi/linux/version.h" ]; then
 314     touch -r "${LNXHDRDIR}/Makefile" "${LNXHDRDIR}/include/generated/uapi/linux/version.h"
 315 elif [ -s "${LNXHDRDIR}/include/linux/version.h" ]; then
 316     touch -r "${LNXHDRDIR}/Makefile" "${LNXHDRDIR}/include/linux/version.h"
 317 else
 318     echo "Missing version.h"
 319     exit 1
 320 fi
 321 touch -r "${LNXHDRDIR}/.config" "${LNXHDRDIR}/include/generated/autoconf.h"
 322
 323 # Copy .config to include/config/auto.conf so "make prepare" is unnecessary.
 324 cp "${LNXHDRDIR}/.config" "${LNXHDRDIR}/include/config/auto.conf"
 325
 326
 327
 328
 329 ## PREPARE FULL LINUX SOURCE TREE
 330
 331 # Enter linux source dir
 332 cd "${LNXSRCDIR}"
 333
 334 # Make sure linux source dir is clean
 335 git clean -xdf
 336
 337 prepare_lnx_sources "${LNXBUILDDIR}"
 338
 339
 340 ## BUILD modules
 341
 342 # Build modules against full kernel sources
 343 build_modules "${LNXBUILDDIR}" "${LTTBUILDKSRCDIR}"
 344
 345 # Build modules against kernel headers
 346 build_modules "${LNXHDRDIR}" "${LTTBUILDKHDRDIR}"
 347
 348 # Make sure modules were built
 349 tree "${LTTBUILDKSRCDIR}"
 350 if [ "x$(find "${LTTBUILDKSRCDIR}" -name '*.ko*' -printf yes -quit)" != "xyes" ]; then
 351   echo "No modules built!"
 352   exit 1
 353 fi
 354
 355 tree "${LTTBUILDKHDRDIR}"
 356 if [ "x$(find "${LTTBUILDKHDRDIR}" -name '*.ko*' -printf yes -quit)" != "xyes" ]; then
 357   echo "No modules built!"
 358   exit 1
 359 fi
 360
 361 # EOF