scripts/lttng-modules/param-build.sh

   1 #!/bin/bash
   2 #
   3 # Copyright (C) 2016-2023 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 set -exu
  19
  20 # Parameters
  21 platform=${platforms:-}
  22 cross_arch=${cross_arch:-}
  23 ktag=${ktag:-}
  24 kgitrepo=${kgitrepo:-}
  25 mversion=${mversion:-}
  26 mgitrepo=${mgitrepo:-}
  27 make_args=()
  28
  29 DEBUG=${DEBUG:-}
  30
  31 # Derive arch from label if it isn't set
  32 if [ -z "${arch:-}" ] ; then
  33     # Labels may be platform specific, eg. jammy-amd64, deb12-armhf
  34     regex='[[:alnum:]]+-([[:alnum:]]+)'
  35     if [[ "${platform}" =~ ${regex} ]] ; then
  36         arch="${BASH_REMATCH[1]}"
  37     else
  38         arch="${platform:-}"
  39     fi
  40 fi
  41
  42
  43 ## FUNCTIONS ##
  44
  45 # Kernel version compare functions
  46 verlte() {
  47     [  "$1" = "$(printf '%s\n%s' "$1" "$2" | sort -V | head -n1)" ]
  48 }
  49
  50 verlt() {
  51     # shellcheck disable=SC2015
  52     [ "$1" = "$2" ] && return 1 || verlte "$1" "$2"
  53 }
  54
  55 vergte() {
  56     [  "$1" = "$(printf '%s\n%s' "$1" "$2" | sort -V | tail -n1)" ]
  57 }
  58
  59 vergt() {
  60     # shellcheck disable=SC2015
  61     [ "$1" = "$2" ] && return 1 || vergte "$1" "$2"
  62 }
  63
  64 print_header() {
  65     set +x
  66
  67     local message=" $1 "
  68     local message_len
  69     local padding_len
  70
  71     message_len="${#message}"
  72     padding_len=$(( (80 - (message_len)) / 2 ))
  73
  74     printf '\n'; printf -- '#%.0s' {1..80}; printf '\n'
  75     printf -- '-%.0s' {1..80}; printf '\n'
  76     printf -- '#%.0s' $(seq 1 $padding_len); printf '%s' "$message"; printf -- '#%.0s' $(seq 1 $padding_len); printf '\n'
  77     printf -- '-%.0s' {1..80}; printf '\n'
  78     printf -- '#%.0s' {1..80}; printf '\n\n'
  79
  80     set -x
  81 }
  82
  83 git_clone_modules_sources() {
  84     mkdir -p "$MODULES_GIT_DIR"
  85
  86     # If the version starts with "refs/", checkout the specific git ref, otherwise treat it
  87     # as a branch name.
  88     if [ "${mversion:0:5}" = "refs/" ]; then
  89         git clone --no-tags --depth=1 "${mgitrepo}" "$MODULES_GIT_DIR"
  90         (cd "$MODULES_GIT_DIR" && git fetch origin "${mversion}" && git checkout FETCH_HEAD)
  91     else
  92         git clone --no-tags --depth=1 -b "${mversion}" "${mgitrepo}" "$MODULES_GIT_DIR"
  93     fi
  94 }
  95
  96 # Checkout a shallow kernel tree of the specified tag
  97 git_clone_linux_sources() {
  98     mkdir -p "$LINUX_GIT_DIR"
  99     git clone --depth=1 -b "${ktag}" --reference "$LINUX_GIT_REF_REPO_DIR" "${kgitrepo}" "$LINUX_GIT_DIR"
 100 }
 101
 102
 103 # Export the kernel sources from the git repo
 104 git_export_linux_sources() {
 105     cd "$LINUX_GIT_DIR"
 106     git archive "${ktag}" | tar -x -C "$LINUX_SRCOBJ_DIR"
 107 }
 108
 109
 110 # Upload the tar archive to the object store
 111 upload_archive_obj() {
 112     s3cmd -c "$WORKSPACE/.s3cfg" put "$WORKSPACE/$obj_name" "$obj_url_prefix/"
 113     rm -f "$WORKSPACE/$obj_name"
 114 }
 115
 116
 117 extract_archive_obj() {
 118     tar -xf "$WORKSPACE/$obj_name" -C "$LINUX_OBJ_DIR" -I pbzip2
 119     rm -f "$WORKSPACE/$obj_name"
 120 }
 121
 122
 123 tar_archive_obj() {
 124     cd "$LINUX_OBJ_DIR"
 125     tar -cf "$WORKSPACE/$obj_name" -I pbzip2 .
 126     cd -
 127 }
 128
 129 # List all GCC versions present in the PATH
 130 list_gccs() {
 131     local gccs
 132     gccs=()
 133     IFS=: read -r -a path_array <<< "$PATH"
 134     while read -r gcc ; do
 135         gccs+=("$gcc")
 136     done < <(find "${path_array[@]}" -maxdepth 1 -regex '.*/gcc-[0-9\.]+$' -printf '%f\n' | sort -t- -k2 -V -r)
 137     echo "${gccs[@]}"
 138 }
 139
 140 # Find the most recent GCC version supported by the kernel sources
 141 select_compiler() {
 142
 143     # Enter linux source dir
 144     cd "$LINUX_SRCOBJ_DIR"
 145
 146     # Get the kernel version using the host toolchain, some cross-compiled arch may be broken
 147     kversion=$(unset ARCH; unset CROSS_COMPILE; make -s kernelversion)
 148
 149     if [ "${cross_arch}" = "riscv64" ] && verlt "${kversion}" "5.12"; then
 150         echo "RISC-V support was upstreamed in kernel v4.19 but kprobes support was only added in v5.12. Don't try to build it."
 151         exit 0
 152     fi
 153
 154     if [ "${cross_arch}" = "arm64" ] && verlt "${kversion}" "3.7"; then
 155         echo "ARM64 support was added as of v3.7. Don't try to build it."
 156         exit 0
 157     fi
 158
 159     if [ "${cross_arch}" = "arm64" ] && verlt "${kversion}" "3.18"; then
 160         echo "lttng-modules requires gcc >= 5.1 for ARM64 due to compiler bugs in gcc."
 161         echo "gcc-5 support was added to the kernel as of v3.18. Don't this to build it."
 162         exit 0
 163     fi
 164
 165     if { verlt "$kversion" "4.4"; }; then
 166         # Force gcc-4.8 for kernels before 4.4
 167         selected_cc='gcc-4.8'
 168         # Due to compiler bugs in gcc on arm64, lttng-modules disallows
 169         # compilation with gcc < 5.1.
 170         if [[ "${cross_arch}" == "arm64" ]] ; then
 171             selected_cc='gcc-5.5'
 172             export PATH="${PATH:-}:/usr/local/gcc5.5/bin"
 173             export LD_LIBRARY_PATH="${LD_LIBRARY_PATH:-}:/usr/local/gcc5.5/lib"
 174         fi
 175         selected_cc_version=$(echo "${selected_cc}" | cut -d'-' -f2)
 176     else
 177         for cc in $(list_gccs) ; do
 178             if "${CROSS_COMPILE:-}${cc}" -I include/ -D__LINUX_COMPILER_H -D__LINUX_COMPILER_TYPES_H -E include/linux/compiler-gcc.h; then
 179                 cc_version=$(echo "${cc}" | cut -d'-' -f2)
 180                 if { verlt "${kversion}" "5.17"; } && { vergt "${cc_version}" "11"; } ; then
 181                     # Using gcc-12+ with '-Wuse-after-free' breaks the build of older
 182                     # kernels (in particular, objtool). Some releases on LTS
 183                     # branches between 4.x and 5.15 can be built with gcc-12.
 184                     # @see https://lore.kernel.org/lkml/20494.1643237814@turing-police/
 185                     # @see https://gitlab.com/linux-kernel/stable/-/commit/52a9dab6d892763b2a8334a568bd4e2c1a6fde66
 186                     continue
 187                 fi
 188                 selected_cc="$cc"
 189                 selected_cc_version="$cc_version"
 190                 break
 191             fi
 192         done
 193     fi
 194
 195     if [ -z "$selected_cc" ]; then
 196       echo "Found no suitable compiler."
 197       exit 1
 198     fi
 199
 200     # lttng-modules requires gcc >= 5.1 for aarch64
 201     # @see https://github.com/lttng/lttng-modules/commit/be06402dbdbea2f3394e60ec15c5d3356e2be416
 202     if { verlt "${selected_cc_version}" "5.1"; } && [ "${cross_arch}" = "arm64" ] ; then
 203         echo "Building lttng-modules on aarch64 requires gcc >= 5.1"
 204         exit 1
 205     fi
 206
 207     cd -
 208 }
 209
 210 export_kbuild_flags() {
 211     local _KAFLAGS
 212     local _KCFLAGS
 213     local _KCPPFLAGS
 214     local _HOSTCFLAGS
 215
 216     _KAFLAGS=()
 217     _KCFLAGS=()
 218     _KCPPFLAGS=()
 219     _HOSTCFLAGS=()
 220
 221     if { vergte "$selected_cc_version" "6"; }; then
 222         # Older kernel Makefiles do not expect the compiler to default to PIE
 223         _KAFLAGS+=(-fno-pie)
 224         _KCFLAGS+=(
 225             -fno-pie
 226             -no-pie
 227             -fno-stack-protector
 228         )
 229         _KCPPFLAGS+=(-fno-pie)
 230     fi
 231
 232     if { vergte "${selected_cc_version}" "10"; } && { verlt "${kversion}" "5.10"; } ; then
 233         # gcc-10 changed the default from '-fcommon' to '-fno-common', which
 234         # causes a linker failure. '-fcommon' can be set on the HOSTCFLAGS
 235         # to avoid the issue.
 236         # @see https://gitlab.com/linux-kernel/stable/-/commit/e33a814e772cdc36436c8c188d8c42d019fda639
 237         _HOSTCFLAGS+=(-fcommon)
 238     fi
 239
 240     if { verlt "${kversion}" "5.14"; } && [ "${cross_arch:-}" == "armhf" ] ; then
 241         # Work-around for producing instructions that aren't valid for the
 242         # default architectures.
 243         # Eg. Error: selected processor does not support `cpsid i' in ARM mode
 244         _KCFLAGS+=(-march=armv7-a -mfpu=vfpv3-d16)
 245         _KCPPFLAGS+=(-march=armv7-a -mfpu=vfpv3-d16)
 246     fi
 247
 248     if { vergt "${selected_cc_version}" "8"; } && { vergte "${kversion}" "4.15"; } && { verlt "${kversion}" "4.17"; } ; then
 249         # This was added to -Wall in gcc 9 but some kernels do not include the fixes
 250         # @see https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88583
 251         _KCFLAGS+=(-Wno-error=packed-not-aligned)
 252     fi
 253
 254     export KAFLAGS="${_KAFLAGS[*]}"
 255     export KCFLAGS="${_KCFLAGS[*]}"
 256     export KCPPFLAGS="${_KCPPFLAGS[*]}"
 257     export HOSTCFLAGS="${_HOSTCFLAGS[*]}"
 258     export CC="${CROSS_COMPILE:-}${selected_cc}"
 259     export HOSTCC="${selected_cc}"
 260
 261     make_args=(
 262         CC="${CC}"
 263         HOSTCC="${HOSTCC}"
 264         HOSTCFLAGS="${HOSTCFLAGS:-}"
 265     )
 266
 267     if [ -n "${DEBUG}" ] ; then
 268         make_args+=(
 269             V=1
 270         )
 271     fi
 272 }
 273
 274 patch_linux_kernel() {
 275     local commit_hash
 276     commit_hash="$1"
 277
 278     # Show the title of the patch in the build log
 279     git -C "${LINUX_GIT_REF_REPO_DIR}" show --oneline -s "${commit_hash}"
 280
 281     # Apply patch, don't fail if it doesn't apply cleanly
 282     set +e
 283     git -C "${LINUX_GIT_REF_REPO_DIR}" format-patch -n1 --stdout "${commit_hash}" | patch -p1
 284     set -e
 285
 286     if [ "$?" -gt 1 ] ; then
 287         echo "Serious issue patching"
 288         exit 1
 289     fi
 290 }
 291
 292 build_linux_kernel() {
 293     cd "$LINUX_SRCOBJ_DIR"
 294
 295     kversion=$(make -s kernelversion "${make_args[@]}")
 296     pahole_version="$(pahole --version | tr -d 'v')"
 297
 298     if { verlt "${kversion}" "3.3"; } && [ "${vanilla_config}" = "imx_v6_v7_defconfig" ] ; then
 299         # imx_v6_v7 didn't exist before 06965c39b4c63933fa0a1cde2237ef85477c5655
 300         if { verlt "${kversion}" "3.2"; } ; then
 301             vanilla_config='mx5_defconfig'
 302         else
 303             vanilla_config='mx51_defconfig'
 304         fi
 305     fi
 306
 307     if { verlt "${kversion}" "3.13"; } && [ "${vanilla_config}" = "pseries_le_defconfig" ] ; then
 308         # pseries_le_deconfig was introduced in f53e462e907cbaed29c49c0f10f5b8f614e1bf1d
 309         vanilla_config='pseries_defconfig'
 310     fi
 311
 312     # Generate kernel configuration
 313     case "$ktag" in
 314       Ubuntu*)
 315         if [ "${cross_arch}" = "powerpc" ] && vergte "${kversion}" "4.10"; then
 316           echo "Ubuntu removed big endian powerpc configuration from kernel >= 4.10. Don't try to build it."
 317           exit 0
 318         fi
 319
 320         if [ "${cross_arch}" = "riscv64" ] && verlt "${kversion}" "6.2"; then
 321           echo "Ubuntu added RISC-V config to their 'regular' kernels in v6.2. Don't try to build it."
 322           exit 0
 323         fi
 324
 325         FAKEROOT_ARGS=(
 326             'KW_DEFCONFIG_DIR=.'
 327         )
 328         fakeroot debian/rules clean "${FAKEROOT_ARGS[@]}"
 329
 330         # Hack for kernel Ubuntu-hwe-5.8
 331         # The debian/control file is produced by the clean target above, so this
 332         # check needs to happen afterwards.
 333         if [ ! -f "debian/compat" ] && ! grep -q debhelper-compat debian/control; then
 334             echo "10" > "debian/compat"
 335         fi
 336
 337         # genconfigs check can fail in certain cases, eg. when a more recent
 338         # compiler exposes kernel configuration flags which aren't set in the
 339         # Ubuntu annotations.
 340         # In any case, the configuration will be updated with any missing values
 341         # later in our build script.
 342         FAKEROOT_ARGS+=('do_skip_checks=true')
 343
 344         # Some Ubuntu tags default the toolchain using `gcc?=gcc-XX` in
 345         # `debian/rules.d/0-common-vars.mk`. This may fail if the gcc version
 346         # used as a default isn't available.
 347         # For example, Ubuntu-6.8.0-7.7 sets `gcc?=gcc-13`, and that version
 348         # of gcc isn't available on the deb12-amd64 ci-nodes.
 349         # Work has also already been done in `select_compiler` to make our
 350         # own decision of which compiler to use. As a result of both cases,
 351         # our compiler choice should be passed into genconfigs.
 352         FAKEROOT_ARGS+=("gcc=${selected_cc}")
 353
 354         fakeroot debian/rules genconfigs "${FAKEROOT_ARGS[@]}"
 355         cp CONFIGS/"${ubuntu_config}" .config
 356         ;;
 357
 358       *)
 359         # Force 32bit build on i386, default is 64bit
 360         if [ "$arch" = "i386" ]; then
 361             export ARCH="i386"
 362         fi
 363
 364         make "${vanilla_config}" "${make_args[@]}"
 365         ;;
 366     esac
 367
 368     if [ "${vanilla_config}" = "pseries_defconfig" ] && [ "${cross_arch}" = "ppc64el" ] ; then
 369         # @see diff <(git show v3.13:arch/powerpc/configs/pseries_defconfig) <(git show v3.13:arch/powerpc/configs/pseries_le_defconfig)
 370         scripts/config --enable CONFIG_CPU_LITTLE_ENDIAN
 371         scripts/config --enable CONFIG_CMA
 372         scripts/config --disable CONFIG_XMON_DEFAULT
 373         # scripts/config --disable CONFIG_VIRTUALIZATION
 374         # scripts/config --disable CONFIG_KVM_BOOK3S_64
 375         scripts/config --disable CONFIG_KVM_BOOK3S_64_HV
 376     fi
 377
 378     # oldnoconfig was renamed in 4.19
 379     if vergte "$kversion" "4.19"; then
 380         update_conf_target="olddefconfig"
 381     else
 382         update_conf_target="oldnoconfig"
 383     fi
 384
 385     # Fix 'defined(@array)' was removed from recent perl
 386     if [ -f "kernel/timeconst.pl" ]; then
 387       sed -i 's/defined(\@\(.*\))/@\1/' kernel/timeconst.pl
 388     fi
 389
 390     # Fix syntax of inline assembly which is confused with C++11 raw strings on gcc >= 5
 391     if [ "$HOSTCC" != "gcc-4.8" ]; then
 392       if [ -f "arch/x86/kvm/svm.c" ]; then
 393         sed -i 's/ R"/ R "/g; s/"R"/" R "/g' arch/x86/kvm/svm.c
 394       fi
 395
 396       if [ -f "arch/x86/kvm/vmx.c" ]; then
 397         sed -i 's/ R"/ R "/g; s/"R"/" R "/g' arch/x86/kvm/vmx.c
 398       fi
 399     fi
 400
 401     if { verlt "${kversion}" "5.11"; } && { vergte "${kversion}" "4.10"; } ; then
 402         # Binutils > 2.35 strips empty symbol tables, causing obltool to fail
 403         # in certain cases when files are empty.
 404         # @see https://gitlab.com/linux-kernel/stable/-/commit/1d489151e9f9d1647110277ff77282fe4d96d09b
 405         #
 406         # There doesn't seem to be any LD/AS/AR flags to control this behaviour,
 407         # therefore patching tools/objtool/elf.c is attempted.
 408         patch_linux_kernel 1d489151e9f9d1647110277ff77282fe4d96d09b
 409         if { verlt "${kversion}" "4.18"; } ; then
 410             patch_linux_kernel e81e0724432542af8d8c702c31e9d82f57b1ff31
 411         fi
 412     fi
 413
 414     if { vergt "${selected_cc_version}" "7"; } && { vergte "${kversion}" "4.14"; } && { verlt "${kversion}" "4.17"; } ; then
 415         # Builds fail due to -Werror=restrict in pager.o and str_error_r.o
 416         if { verlt "${kversion}" "4.16"; } ; then
 417             # This is patched since objtool's Makefile doesn't respect HOSTCFLAGS
 418             # @see https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ad343a98e74e85aa91d844310e797f96fee6983b
 419             patch_linux_kernel ad343a98e74e85aa91d844310e797f96fee6983b
 420         fi
 421         if { verlt "${kversion}" "4.17"; } ; then
 422             # This is patched since objtool's Makefile doesn't respect HOSTCFLAGS
 423             # @see https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=854e55ad289ef8888e7991f0ada85d5846f5afb9
 424             patch_linux_kernel 854e55ad289ef8888e7991f0ada85d5846f5afb9
 425         fi
 426
 427     fi
 428
 429     if { vergt "${selected_cc_version}" "9"; } && { verlt "${kversion}" "5.6"; } ; then
 430         # Duplicate decalarations of __force_order
 431         # @see https://gitlab.com/linux-kernel/stable/-/commit/df6d4f9db79c1a5d6f48b59db35ccd1e9ff9adfc
 432         # However, kaslr_64.c doesn't exit in 4.15, 4.16, it's named pagetable.c
 433         if [ -f arch/x86/boot/compressed/pagetable.c ] ; then
 434             sed -i '/^unsigned long __force_order;$/d' arch/x86/boot/compressed/pagetable.c
 435         fi
 436         if [ -f arch/x86/boot/compressed/kaslr_64.c ] ; then
 437             patch_linux_kernel df6d4f9db79c1a5d6f48b59db35ccd1e9ff9adfc
 438         fi
 439     fi
 440
 441     if { vergte "${kversion}" "4.18"; } && { verlt "${kversion}" "4.19"; } ; then
 442         # In some cases, compiling net/bpfilter can fail with the following error:
 443         #   net/bpfilter/main.c:9:10: fatal error: include/uapi/linux/bpf.h: No such file or directory
 444         #   make[2]: *** [scripts/Makefile.host:107: net/bpfilter/main.o] Error 1
 445         #
 446         # While the issue is potentially in a number of old versions, it has only
 447         # been observed in v4.18-rt
 448         #
 449         patch_linux_kernel 303a339f30a9441c4695d3d2cc78f1b33cd959ff
 450     fi
 451
 452     if { vergte "${kversion}" "4.18"; } && { verlt "${kversion}" "4.19"; } ; then
 453         # In some cases, compiling net/bpfilter can fail with the following error:
 454         #   net/bpfilter/main.c:9:10: fatal error: include/uapi/linux/bpf.h: No such file or directory
 455         #   make[2]: *** [scripts/Makefile.host:107: net/bpfilter/main.o] Error 1
 456         #
 457         # While the issue is potentially in a number of old versions, it has only
 458         # been observed in v4.18-rt
 459         #
 460         patch_linux_kernel 303a339f30a9441c4695d3d2cc78f1b33cd959ff
 461     fi
 462
 463     if { vergte "${kversion}" "4.15"; } && { verlt "${kversion}" "4.18"; } ; then
 464         # Some old kernels fail to build when make is too new
 465         # @see https://gitlab.com/linux-kernel/stable/-/commit/9feeb638cde083c737e295c0547f1b4f28e99583
 466         patch_linux_kernel 9564a8cf422d7b58f6e857e3546d346fa970191e
 467     fi
 468
 469     if { vergte "${kversion}" "4.14"; } && { verlt "${kversion}" "4.14.55"; } ; then
 470         # Some old kernels fail to build when make is too new
 471         # @see https://gitlab.com/linux-kernel/stable/-/commit/9feeb638cde083c737e295c0547f1b4f28e99583
 472         patch_linux_kernel e82885490a611f2b75a6c27cd7bb09665c1740be
 473     fi
 474
 475     if ( { vergte "${kversion}" "4.15"; } && { verlt "${kversion}" "4.18"; } ) || \
 476        ( { vergte "${kversion}" "4.14"; } && { verlt "${kversion}" "4.14.56"; } ) ; then
 477         # Some old kernels fail to build when make is too new
 478         # @see https://gitlab.com/linux-kernel/stable/-/commit/9feeb638cde083c737e295c0547f1b4f28e99583
 479         patch_linux_kernel 9feeb638cde083c737e295c0547f1b4f28e99583
 480     fi
 481
 482     if ( { vergte "${kversion}" "4.12"; } && { verlt "${kversion}" "4.20.17"; } ) || \
 483        ( { vergte "${kversion}" "5.0"; } && { verlt "${kversion}" "5.0.12"; } ) ; then
 484         # Old kernels can fail to build while on newer host kernels with errors
 485         # such as:
 486         #   In file included from scripts/selinux/genheaders/genheaders.c:19:
 487         #   ./security/selinux/include/classmap.h:249:2: error: #error New address family defined, please update secclass_map.
 488         # @see https://gitlab.com/linux-kernel/stable/-/commit/dfbd199a7cfe3e3cd8531e1353cdbd7175bfbc5e
 489         #
 490         patch_linux_kernel dfbd199a7cfe3e3cd8531e1353cdbd7175bfbc5e
 491     fi
 492
 493     # Compatibility with binutils >= ~ 2.31
 494     if { vergte "${kversion}" "3.19"; } && { verlt "${kversion}" "4.16"; } ; then
 495         patch_linux_kernel b21ebf2fb4cde1618915a97cc773e287ff49173e
 496     fi
 497     if { vergte "${kversion}" "3.17"; } && { verlt "${kversion}" "3.18.69"; } ; then
 498         patch_linux_kernel edb9d2d5e647e7a8521b0d35f8452deb02dfd138
 499     fi
 500     if { vergte "${kversion}" "3.17"; } && { verlt "${kversion}" "3.18.100"; } ; then
 501         patch_linux_kernel 3be6583f0b6f1bf1ee650ebf473d9dee36836527
 502         patch_linux_kernel 12d839211d080f6a9c370398c41a260365d34c62
 503     fi
 504     if { vergte "${kversion}" "3.16"; } && { verlt "${kversion}" "3.16.82"; } ; then
 505         patch_linux_kernel ad10e6d464796f2a481de4039a43b9cfca034e1c
 506     fi
 507
 508     if ( { vergte "${kversion}" "3.14"; } && { verlt "${kversion}" "4.4"; } ) ||
 509        ( { vergte "${kversion}" "4.8"; } && { verlt "${kversion}" "4.18"; } ); then
 510         # While the original motivation of this patch is for fixing builds using
 511         # clang, the same error occurs between linux >= 3.14 and < 4.4, and in
 512         # 4.15, 4.16.
 513         # For rt-linux, the error has been observed in 4.8, 4.11, and 4.13.
 514         #
 515         # This patch only partially applies due to changes in kernel/Makefile,
 516         # so a supplementary patch is needed
 517         #
 518         # Without this patch, builds fail with
 519         #   Cannot find symbol for section 2: .text.
 520         #   kernel/elfcore.o: failed
 521         #
 522         # @see https://github.com/linuxppc/issues/issues/388
 523         # @see https://lore.kernel.org/lkml/20201204165742.3815221-2-arnd@kernel.org/
 524         #
 525         patch_linux_kernel 6e7b64b9dd6d96537d816ea07ec26b7dedd397b9
 526         if grep -q elfcore.o kernel/Makefile ; then
 527             sed -i '/^.* += elfcore.o$/d' kernel/Makefile
 528         fi
 529     fi
 530     # Same as above for the v4.4 branch
 531     if ( { vergte "${kversion}" "4.4"; } && { verlt "${kversion}" "4.4.257"; } ); then
 532         patch_linux_kernel 3140b0740b31cc63cf2ee08bc3f746b423eb068d
 533         if grep -q elfcore.o kernel/Makefile ; then
 534             sed -i '/^.* += elfcore.o$/d' kernel/Makefile
 535         fi
 536     fi
 537
 538     if { vergte "${kversion}" "4.5"; } && { verlt "${kversion}" "4.8"; } ; then
 539         # Kernels between v4.5 and v4.8 built with gcc >= 8 on arm will hit an
 540         # assembler error :
 541         #
 542         #  kernel/.tmp_fork.s: Assembler messages:
 543         #  kernel/.tmp_fork.s:1790: Error: .err encountered
 544         #
 545         # @see https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85745
 546         #
 547         patch_linux_kernel 9f73bd8bb445e0cbe4bcef6d4cfc788f1e184007
 548     fi
 549
 550     if ( { vergte "${kversion}" "4.4"; } && { verlt "${kversion}" "4.4.136"; } ) ||
 551        ( { vergte "${kversion}" "4.5"; } && { verlt "${kversion}" "4.8"; } ); then
 552         # Hacky patch to deal with the following build error:
 553         #   Cannot find symbol for section 7: .text.unlikely.
 554         #   kernel/kexec_file.o: failed
 555         #   make[1]: *** [scripts/Makefile.build:291: kernel/kexec_file.o] Error 1
 556         #
 557         # This error happens with binutils 2.36 and 2.37, but should probably not
 558         # be an issue with binutils 2.38.
 559         # @see https://github.com/linuxppc/issues/issues/388
 560         # @see https://github.com/bminor/binutils-gdb/commit/c09c8b42021180eee9495bd50d8b35e683d3901b
 561         #
 562         # There is some sort of config (unspecified in past discussions) which
 563         # provokes the error, and there was never a potential fix merged in
 564         # this discussion, in part because the build systems of the kernel
 565         # switched to objtool instead.
 566         #
 567         # @see https://lore.kernel.org/all/20210215162209.5e2a475b@gandalf.local.home/
 568         #
 569         sed -i 's/return txtname;/return shdr0->sh_size ? txtname : NULL;/' scripts/recordmcount.h
 570
 571         # After applying the above patch, the build continues but fails with
 572         # head64.c:(.text.exit+0x5): undefined reference to `__gcov_exit'
 573         #
 574         scripts/config --disable CONFIG_GCOV_KERNEL
 575     fi
 576
 577     if { vergte "${kversion}" "4.5"; } && { verlt "${kversion}" "4.5.5"; } ; then
 578         # drivers/staging/wilc1000/wilc_spi.c:123:34: error: storage size of ‘wilc1000_spi_ops’ isn’t known
 579         patch_linux_kernel ce7b516f3f9e11fe4ee06fad0d7e853bb6e8f160
 580     fi
 581
 582     # Newer binutils don't accept 3 operand 'cmp' instructions on ppc64
 583     # Convert them to 'cmpw' which was previously done silently
 584     if verlt "$kversion" "4.9"; then
 585         find arch/powerpc/ -name "*.S" -print0 | xargs -0 sed -i "s/\(cmp\)\(\s\+[a-zA-Z0-9]\+,\s*[a-zA-Z0-9]\+,\s*[a-zA-Z0-9]\+\)/cmpw\2/"
 586         find arch/powerpc/ -name "*.S" -print0 | xargs -0 sed -i "s/\(cmpli\)\(\s\+[a-zA-Z0-9]\+,\s*[a-zA-Z0-9]\+,\s*[a-zA-Z0-9]\+\)/cmplwi\2/"
 587         sed -i "s/\$pie \-o \"\$ofile\"/\$pie --no-dynamic-linker -o \"\$ofile\"/" arch/powerpc/boot/wrapper
 588     fi
 589
 590     if [ "$(scripts/config --state CONFIG_EXTCON_ADC_JACK)" != "n" ] &&
 591            ( { vergte "${kversion}" "4.2"; } && { verlt "${kversion}" "4.12"; } ); then
 592         # 73b6ecdb93e8e77752cae9077c424fcdc6f23c39 introduced a change where
 593         # extcon-adc-jack.h has an incompatible pointer type.
 594         # In GCC >= 5 this will provoke a warning and build failure.
 595         # Eg.
 596         #   drivers/extcon/extcon-adc-jack.c: In function ‘adc_jack_probe’:
 597         #   drivers/extcon/extcon-adc-jack.c:111:64: error: passing argument 2 of ‘devm_extcon_dev_allocate’ from incompatible pointer type [-Werror=incompatible-pointer-types]
 598         #   make[2]: *** [scripts/Makefile.build:295: drivers/extcon/extcon-adc-jack.o] Error 1
 599         #
 600         # 8a522bf2d4f788306443d36b26b54f0aedcdfdbe (in 4.11) has a fix for this warning
 601         #
 602         patch_linux_kernel 8a522bf2d4f788306443d36b26b54f0aedcdfdbe
 603     fi
 604
 605     if ( { vergte "${kversion}" "4.15"; } && { verlt "${kversion}" "4.15.2"; } ) || \
 606        ( { vergte "${kversion}" "4.14"; } && { verlt "${kversion}" "4.14.18"; } ) ; then
 607         # Fix an objtool Segmentation fault
 608         patch_linux_kernel dd12561854824fd1f05baf2a1b794faa046e2425
 609     fi
 610
 611     if { vergte "${kversion}" "4.14"; } && { verlt "${kversion}" "4.14.268"; } ; then
 612         # Builds fail due to -Werror=use-after-free in sigchain.o and help.o
 613         patch_linux_kernel e89bb266b710ce056f141f29f091fd468a4a8185
 614     fi
 615
 616     # Fix a typo in v2.6.36.x
 617     if [ -f "arch/x86/kernel/entry_64.S" ]; then
 618       sed -i 's/END(do_hypervisor_callback)/END(xen_do_hypervisor_callback)/' arch/x86/kernel/entry_64.S
 619     fi
 620
 621     # Fix compiler switch in vdso Makefile for 2.6.36 to 2.6.36.2
 622     if { vergte "$kversion" "2.6.36" && verlte "$kversion" "2.6.36.3"; }; then
 623       sed -i 's/-m elf_x86_64/-m64/' arch/x86/vdso/Makefile
 624       sed -i 's/-m elf_i386/-m32/' arch/x86/vdso/Makefile
 625     fi
 626
 627     # Fix kernel < 3.0 with gcc >= 4.7
 628     if verlt "$kversion" "3.0"; then
 629       sed -i '/linux\/compiler.h/a #include <linux\/linkage.h> \/* For asmregparm *\/' arch/x86/include/asm/ptrace.h
 630       sed -i 's/extern long syscall_trace_enter/extern asmregparm long syscall_trace_enter/' arch/x86/include/asm/ptrace.h
 631       sed -i 's/extern void syscall_trace_leave/extern asmregparm void syscall_trace_leave/' arch/x86/include/asm/ptrace.h
 632       echo "header-y += linkage.h" >> include/linux/Kbuild
 633     fi
 634
 635     if [ "${cross_arch}" = "powerpc" ] ; then
 636         if { vergte "${kversion}" "4.15"; } && { verlt "${kversion}" "4.16"; } ; then
 637             # Avoid register errors such as
 638             # aes_generic.c:(.text+0x4e0): undefined reference to `_restgpr_31_x'
 639             # @see https://gitlab.com/linux-kernel/stable/-/commit/148b974deea927f5dbb6c468af2707b488bfa2de
 640             make_args+=(
 641                 CFLAGS_aes_generic.o=''
 642             )
 643         fi
 644     fi
 645
 646     if [ "$(scripts/config --state CONFIG_DEBUG_INFO_BTF)" == "y" ] &&
 647            { vergte "${pahole_version}" "1.24"; } &&
 648            { vergte "${kversion}" "5.10"; } && { verlt "${kversion}" "6.0"; } ;then
 649         # Some kernels Eg. Ubuntu-hwe-5.13-5.13.0-52.59_20.04.1
 650         # fail with the following error:
 651         #   BTFIDS  vmlinux
 652         #   FAILED: load BTF from vmlinux: Invalid argument
 653         #
 654         # When CONFIG_DEBUG_INFO_BTF is set, certain versions of pahole require
 655         # `--skip_encoding_btf_enum64` to be passed as the kernel doesn't define
 656         # BTF_KIND_ENUM64.
 657         #
 658         # Introduced in 341dfcf8d78eaa3a2dc96dea06f0392eb2978364 (~v5.10)
 659         # @see https://lore.kernel.org/bpf/20220825171620.cioobudss6ovyrkc@altlinux.org/t/
 660         #
 661         if [ -f "scripts/pahole-flags.sh" ] ; then
 662             # shellcheck disable=SC2016
 663             sed -i 's/ -J ${PAHOLE_FLAGS} / -J ${PAHOLE_FLAGS} --skip_encoding_btf_enum64 /' scripts/link-vmlinux.sh
 664         else
 665             # shellcheck disable=SC2016
 666             sed -i 's/ -J ${extra_paholeopt} / -J ${extra_paholeopt} --skip_encoding_btf_enum64 /' scripts/link-vmlinux.sh
 667         fi
 668     fi
 669
 670     # GCC 4.8
 671     if [ "$HOSTCC" == "gcc-4.8" ]; then
 672         scripts/config --disable CONFIG_CC_STACKPROTECTOR_STRONG
 673         scripts/config --disable CONFIG_PPC_OF_BOOT_TRAMPOLINE
 674     fi
 675
 676     # Don't try to sign modules
 677     scripts/config --disable CONFIG_MODULE_SIG
 678
 679     # Disable kernel stack frame correctness validation, introduced in 4.6.0 and currently fails
 680     scripts/config --disable CONFIG_STACK_VALIDATION
 681
 682     # Cause problems with inline assembly on i386
 683     scripts/config --disable CONFIG_DEBUG_SECTION_MISMATCH
 684
 685     # Don't build samples, they are broken on some kernel releases
 686     scripts/config --disable CONFIG_SAMPLES
 687     scripts/config --disable CONFIG_BUILD_DOCSRC
 688
 689     # Disable kcov
 690     scripts/config --disable CONFIG_KCOV
 691
 692     # Broken on some RT kernels
 693     scripts/config --disable CONFIG_HYPERV
 694
 695     # Broken drivers
 696     scripts/config --disable CONFIG_RAPIDIO_TSI721
 697     scripts/config --disable CONFIG_SGI_XP
 698     scripts/config --disable CONFIG_MFD_WM8994
 699     scripts/config --disable CONFIG_DRM_RADEON
 700     scripts/config --disable CONFIG_SND_SOC_WM5100
 701     # More recent compiler optimizations (from gcc 8 onwards )expose build errors
 702     # with netronome on older kernels.
 703     # Observed in 4.11-rt, 4.15-4.17, 5.0-rt - 5.16-rt
 704     # It seems easier to disable the driver than to attempt patching.
 705     # Eg.
 706     #   In function ‘ur_load_imm_any’,
 707     #   inlined from ‘jeq_imm’ at drivers/net/ethernet/netronome/nfp/bpf/jit.c:3146:13:
 708     #   ./include/linux/compiler.h:350:45: error: call to ‘__compiletime_assert_1062’ declared with attribute error: FIELD_FIT: value too large for the field
 709     #   350 |         _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
 710     #
 711     scripts/config --disable CONFIG_NET_VENDOR_NETRONOME
 712     # Eg.
 713     #  In function ‘memcpy’,
 714     #  inlined from ‘kszphy_get_strings’ at drivers/net/phy/micrel.c:664:3:
 715     #  ./include/linux/string.h:305:25: error: call to ‘__read_overflow2’ declared with attribute error: detected read beyond size of object passed as 2nd parameter
 716     #  305 |                         __read_overflow2();
 717     #      |                         ^~~~~~~~~~~~~~~~~~
 718     #  make[3]: *** [scripts/Makefile.build:308: drivers/net/phy/micrel.o] Error 1
 719     #
 720     scripts/config --disable CONFIG_MICREL_PHY
 721
 722
 723     # IGBVF won't build with recent gcc on 2.6.38.x
 724     if { vergte "$kversion" "2.6.37" && verlt "$kversion" "2.6.38"; }; then
 725       scripts/config --disable CONFIG_IGBVF
 726     fi
 727
 728     # Don't fail the build on warnings
 729     scripts/config --disable CONFIG_WERROR
 730     scripts/config --enable CONFIG_PPC_DISABLE_WERROR
 731
 732     # Set required options
 733     scripts/config --enable CONFIG_TRACEPOINTS
 734     scripts/config --enable CONFIG_KALLSYMS
 735     scripts/config --enable CONFIG_HIGH_RES_TIMERS
 736     scripts/config --enable CONFIG_KPROBES
 737     scripts/config --enable CONFIG_FTRACE
 738     scripts/config --enable CONFIG_BLK_DEV_IO_TRACE
 739     scripts/config --enable CONFIG_KALLSYMS_ALL
 740     scripts/config --enable CONFIG_HAVE_SYSCALL_TRACEPOINTS
 741     scripts/config --enable CONFIG_PERF_EVENTS
 742     scripts/config --enable CONFIG_EVENT_TRACING
 743     scripts/config --enable CONFIG_KRETPROBES
 744
 745     if [ -n "${DEBUG}" ] ; then
 746         cat .config
 747     fi
 748
 749     make "$update_conf_target" "${make_args[@]}"
 750     make -j"$NPROC" "${make_args[@]}"
 751
 752     krelease=$(make -s kernelrelease "${make_args[@]}")
 753
 754     # Save the kernel and modules
 755     mkdir -p "$LINUX_INSTOBJ_DIR/boot"
 756     make INSTALL_MOD_PATH="$LINUX_INSTOBJ_DIR" INSTALL_MOD_STRIP=1 modules_install "${make_args[@]}"
 757     make INSTALL_MOD_PATH="$LINUX_INSTOBJ_DIR" INSTALL_PATH="$LINUX_INSTOBJ_DIR/boot" install "${make_args[@]}"
 758     rm -f "$LINUX_INSTOBJ_DIR/lib/modules/${krelease}/source" "$LINUX_INSTOBJ_DIR/lib/modules/${krelease}/build"
 759     ln -s ../../../../sources "$LINUX_INSTOBJ_DIR/lib/modules/${krelease}/source"
 760     ln -s ../../../../sources "$LINUX_INSTOBJ_DIR/lib/modules/${krelease}/source"
 761 }
 762
 763
 764 extract_distro_headers() {
 765
 766     # Enter linux source dir
 767     cd "${LINUX_SRCOBJ_DIR}"
 768
 769
 770     # For RT kernels, copy version file
 771     if [ -s localversion-rt ]; then
 772         cp -a localversion-rt "${LINUX_HDROBJ_DIR}"
 773     fi
 774
 775     # Copy all Makefile related stuff
 776     find . -path './include/*' -prune \
 777         -o -path './scripts/*' -prune -o -type f \
 778         \( -name 'Makefile*' -o -name 'Kconfig*' -o -name 'Kbuild*' -o \
 779             -name '*.sh' -o -name '*.pl' -o -name '*.lds' \) \
 780         -print | cpio -pd --preserve-modification-time "${LINUX_HDROBJ_DIR}"
 781
 782     # Copy base scripts and include dirs
 783     cp -a scripts include "${LINUX_HDROBJ_DIR}"
 784
 785     # Copy arch includes
 786     (find arch -name include -type d -print0 | \
 787         xargs -0 -n1 -I '{}' find '{}' -type f) | \
 788         cpio -pd --preserve-modification-time "${LINUX_HDROBJ_DIR}"
 789
 790     # Copy arch scripts
 791     (find arch -name scripts -type d -print0 | \
 792         xargs -0 -n1 -I '{}' find '{}' -type f) | \
 793         cpio -pd --preserve-modification-time "${LINUX_HDROBJ_DIR}"
 794
 795     # Cleanup scripts
 796     rm -f "${LINUX_HDROBJ_DIR}/scripts/*.o"
 797     rm -f "${LINUX_HDROBJ_DIR}/scripts/*/*.o"
 798
 799     # On powerpc 32bits this object is required to link modules
 800     if [ "${karch}" = "powerpc" ]; then
 801         if [ "$(scripts/config -s CONFIG_PPC64)" = "y" ] && vergte "${kversion}" "5.4"; then
 802             :
 803         else
 804             cp -a --parents arch/powerpc/lib/crtsavres.[So] "${LINUX_HDROBJ_DIR}/"
 805         fi
 806     fi
 807
 808     # On arm64 between 4.13 and 1.15 this object is required to build with ftrace support
 809     if [ "${karch}" = "arm64" ]; then
 810         if [ -f "arch/arm64/kernel/ftrace-mod.S" ]; then
 811             cp -a --parents arch/arm64/kernel/ftrace-mod.[So] "${LINUX_HDROBJ_DIR}/"
 812         fi
 813     fi
 814
 815     # On riscv with 5.14 the vsdo objects are required
 816     if [ "${karch}" = "riscv" ] && \
 817            ( { vergte "${kversion}" "5.14"; } && { verlt "${kversion}" "5.15"; } ); then
 818             cp -a --parents arch/riscv/kernel/vdso/*.o "${LINUX_HDROBJ_DIR}/"
 819     fi
 820
 821     # Newer kernels need objtool to build modules when CONFIG_STACK_VALIDATION=y
 822     if [ -f tools/objtool/objtool ]; then
 823       cp -a --parents tools/objtool/objtool "${LINUX_HDROBJ_DIR}/"
 824     fi
 825
 826     if [ -f "arch/x86/kernel/macros.s" ]; then
 827       cp -a --parents arch/x86/kernel/macros.s "${LINUX_HDROBJ_DIR}/"
 828     fi
 829
 830     # Copy modules related stuff, if available
 831     if [ -s Module.symvers ]; then
 832         cp Module.symvers "${LINUX_HDROBJ_DIR}"
 833     fi
 834
 835     if [ -s System.map ]; then
 836         cp System.map "${LINUX_HDROBJ_DIR}"
 837     fi
 838
 839     if [ -s Module.markers ]; then
 840         cp Module.markers "${LINUX_HDROBJ_DIR}"
 841     fi
 842
 843     # Copy config file
 844     cp .config "${LINUX_HDROBJ_DIR}"
 845
 846     # Make sure the Makefile and version.h have a matching timestamp so that
 847     # external modules can be built
 848     if [ -s "${LINUX_HDROBJ_DIR}/include/generated/uapi/linux/version.h" ]; then
 849         touch -r "${LINUX_HDROBJ_DIR}/Makefile" "${LINUX_HDROBJ_DIR}/include/generated/uapi/linux/version.h"
 850     elif [ -s "${LINUX_HDROBJ_DIR}/include/linux/version.h" ]; then
 851         touch -r "${LINUX_HDROBJ_DIR}/Makefile" "${LINUX_HDROBJ_DIR}/include/linux/version.h"
 852     else
 853         echo "Missing version.h"
 854         exit 1
 855     fi
 856     touch -r "${LINUX_HDROBJ_DIR}/.config" "${LINUX_HDROBJ_DIR}/include/generated/autoconf.h"
 857
 858     # Copy .config to include/config/auto.conf so "make prepare" is unnecessary.
 859     if [ ! -f "${LINUX_HDROBJ_DIR}/include/config/auto.conf" ]; then
 860         cp "${LINUX_HDROBJ_DIR}/.config" "${LINUX_HDROBJ_DIR}/include/config/auto.conf"
 861     fi
 862
 863     # Finally clean the object files from the full source tree
 864     make clean
 865
 866     # And regen the modules support files
 867     make modules_prepare "${make_args[@]}"
 868
 869     # On powerpc 32bits this object is required to link modules
 870     if [ "${karch}" = "powerpc" ]; then
 871         if [ "$(scripts/config -s CONFIG_PPC64)" = "y" ] && vergte "${kversion}" "5.4"; then
 872             :
 873         else
 874             make arch/powerpc/lib/crtsavres.o "${make_args[@]}"
 875         fi
 876     fi
 877
 878     # On arm64 between 4.13 and 4.15 this object is required to build with ftrace support
 879     if [ "${karch}" = "arm64" ]; then
 880         if [ -f "arch/arm64/kernel/ftrace-mod.S" ]; then
 881             make arch/arm64/kernel/ftrace-mod.o "${make_args[@]}"
 882         fi
 883     fi
 884
 885     # Version specific tasks
 886     case "$ktag" in
 887       Ubuntu*)
 888         # Add Ubuntu ABI number to kernel headers, this is normally done by the packaging code
 889         ABINUM="$(echo "$ktag" | grep -P -o 'Ubuntu-(lts-)?.*-\K\d+(?=\..*)')"
 890         echo "#define UTS_UBUNTU_RELEASE_ABI $ABINUM" >> include/generated/utsrelease.h
 891         echo "#define UTS_UBUNTU_RELEASE_ABI $ABINUM" >> "${LINUX_HDROBJ_DIR}/include/generated/utsrelease.h"
 892         ;;
 893     esac
 894 }
 895
 896
 897 build_modules() {
 898
 899     local kdir="$1"
 900     local outdir="$2"
 901     local kversion
 902
 903     kversion=$(make -C "$LINUX_HDROBJ_DIR" -s kernelversion)
 904
 905     # Try to catch some compatibility problems by turning some
 906     # warnings into errors.
 907     #export KCFLAGS="$KCFLAGS -Wall -Werror"
 908
 909     # Enter lttng-modules source dir
 910     cd "${MODULES_GIT_DIR}"
 911
 912     # kernels 3.10 to 3.10.13 and 3.11 to 3.11.2 introduce a deadlock in the
 913     # timekeeping subsystem. We want those build to fail.
 914     if { vergte "$kversion" "3.10" && verlte "$kversion" "3.10.13"; } || \
 915        { vergte "$kversion" "3.11" && verlte "$kversion" "3.11.2"; }; then
 916
 917         set +e
 918
 919         # Build modules
 920         KERNELDIR="${kdir}" make -j"${NPROC}" V=1 "${make_args[@]}"
 921         ret=$?
 922
 923         set -e
 924
 925         # We expect this build to fail, if it doesn't, fail the job.
 926         if [ "$ret" -eq 0 ]; then
 927             echo "This build should have failed."
 928             exit 1
 929         fi
 930
 931         # We have to publish at least one file or the build will fail
 932         echo "This kernel is broken, there is a deadlock in the timekeeping subsystem." > "${outdir}/BROKEN.txt.ko"
 933
 934         KERNELDIR="${kdir}" make clean
 935
 936     else # Regular build
 937
 938         # Build modules against full kernel sources
 939         KERNELDIR="${kdir}" make -j"${NPROC}" V=1 "${make_args[@]}"
 940
 941         # Install modules to build dir
 942         KERNELDIR="${kdir}" make INSTALL_MOD_PATH="${outdir}" modules_install
 943
 944         # Clean build dir
 945         KERNELDIR="${kdir}" make clean
 946     fi
 947 }
 948
 949
 950 ## MAIN ##
 951
 952 # Use all CPU cores
 953 NPROC=$(nproc)
 954
 955 MODULES_GIT_DIR="${WORKSPACE}/src/lttng-modules"
 956 LINUX_GIT_DIR="${WORKSPACE}/src/linux"
 957
 958 LINUX_OBJ_DIR="${WORKSPACE}/linux"
 959 LINUX_SRCOBJ_DIR="${LINUX_OBJ_DIR}/sources"
 960 LINUX_HDROBJ_DIR="${LINUX_OBJ_DIR}/headers"
 961 LINUX_INSTOBJ_DIR="${LINUX_OBJ_DIR}/install"
 962
 963 MODULES_OUTPUT_KSRC_DIR="${WORKSPACE}/build/lttng-modules-ksrc"
 964 MODULES_OUTPUT_KHDR_DIR="${WORKSPACE}/build/lttng-modules-khdr"
 965
 966 LINUX_GIT_REF_REPO_DIR="$HOME/gitcache/linux-stable.git/"
 967
 968 OBJ_STORE_URL="s3://jenkins"
 969
 970 cd "$WORKSPACE"
 971
 972 # Create build directories
 973 mkdir -p "${LINUX_SRCOBJ_DIR}" "${LINUX_HDROBJ_DIR}" "${LINUX_INSTOBJ_DIR}" "${MODULES_OUTPUT_KSRC_DIR}" "${MODULES_OUTPUT_KHDR_DIR}"
 974
 975 print_header "Clone LTTng-modules sources"
 976 git_clone_modules_sources
 977
 978 # Setup cross compile env if available
 979 if [ "x${cross_arch}" != "x" ]; then
 980
 981     case "$cross_arch" in
 982         "armhf")
 983             karch="arm"
 984             cross_compile="arm-linux-gnueabihf-"
 985             vanilla_config="imx_v6_v7_defconfig"
 986             ubuntu_config="armhf-config.flavour.generic"
 987             ;;
 988
 989         "arm64")
 990             karch="arm64"
 991             cross_compile="aarch64-linux-gnu-"
 992             vanilla_config="defconfig"
 993             ubuntu_config="arm64-config.flavour.generic"
 994             ;;
 995
 996         "powerpc")
 997             karch="powerpc"
 998             cross_compile="powerpc-linux-gnu-"
 999             vanilla_config="ppc44x_defconfig"
1000             ubuntu_config="powerpc-config.flavour.powerpc-smp"
1001             ;;
1002
1003         "ppc64el")
1004             karch="powerpc"
1005             cross_compile="powerpc64le-linux-gnu-"
1006             vanilla_config="pseries_le_defconfig"
1007             ubuntu_config="ppc64el-config.flavour.generic"
1008             ;;
1009
1010         "riscv64")
1011             karch="riscv"
1012             cross_compile="riscv64-linux-gnu-"
1013             vanilla_config="defconfig"
1014             ubuntu_config="riscv64-config.flavour.generic"
1015             ;;
1016
1017         *)
1018             echo "Unsupported cross arch $cross_arch"
1019             exit 1
1020             ;;
1021     esac
1022
1023     # Export variables used by Kbuild for cross compilation
1024     export ARCH="${karch}"
1025     export CROSS_COMPILE="${cross_compile}"
1026
1027 # Set arch specific values if we are not cross compiling
1028 elif [ "x${arch}" != "x" ]; then
1029
1030     case "$arch" in
1031         "i386")
1032             karch="x86"
1033             vanilla_config="allmodconfig"
1034             ubuntu_config="i386-config.flavour.generic"
1035             ;;
1036
1037         "amd64")
1038             karch="x86"
1039             vanilla_config="allmodconfig"
1040             ubuntu_config="amd64-config.flavour.generic"
1041             ;;
1042
1043         "armhf")
1044             karch="arm"
1045             vanilla_config="allmodconfig"
1046             ubuntu_config="armhf-config.flavour.generic"
1047             ;;
1048
1049         "arm64")
1050             karch="arm64"
1051             vanilla_config="allmodconfig"
1052             ubuntu_config="arm64-config.flavour.generic"
1053             ;;
1054
1055         "powerpc")
1056             karch="powerpc"
1057             vanilla_config="allmodconfig"
1058             ubuntu_config="powerpc-config.flavour.powerpc-smp"
1059             ;;
1060
1061         "ppc64el")
1062             karch="powerpc"
1063             vanilla_config="allmodconfig"
1064             ubuntu_config="ppc64el-config.flavour.generic"
1065             ;;
1066
1067         "riscv64")
1068             karch="riscv"
1069             vanilla_config="allmodconfig"
1070             ubuntu_config="riscv64-config.flavour.generic"
1071             ;;
1072
1073         *)
1074             echo "Unsupported arch $arch"
1075             exit 1
1076             ;;
1077     esac
1078 else
1079     echo "No arch or cross_arch specified"
1080     exit 1
1081 fi
1082
1083
1084
1085 # First get the kernel build from the object store, or build it, if it's
1086 # not available.
1087
1088 set +x
1089 echo "# Setup endpoint
1090 host_base = obj.internal.efficios.com
1091 host_bucket = obj.internal.efficios.com
1092 bucket_location = us-east-1
1093 use_https = True
1094
1095 # Setup access keys
1096 access_key = jenkins
1097 secret_key = echo123456
1098
1099 # Enable S3 v4 signature APIs
1100 signature_v2 = False" > "$WORKSPACE/.s3cfg"
1101 set -x
1102
1103 url_hash="$(echo -n "$kgitrepo" | md5sum | awk '{ print $1 }')"
1104 obj_name="linux.tar.bz2"
1105
1106 if [ -z "${cross_arch}" ]; then
1107     obj_url_prefix="$OBJ_STORE_URL/linux-build/$url_hash/$ktag/platform-${platform}/$arch/native"
1108 else
1109     obj_url_prefix="$OBJ_STORE_URL/linux-build/$url_hash/$ktag/platform-${platform}/${cross_arch}"
1110 fi
1111
1112 obj_url="$obj_url_prefix/$obj_name"
1113
1114 set +e
1115 # In s3cmd 2.3, the return code of get when an object does not exist (64)
1116 # is different than in 2.2 (12). The return codes of 's3cmd info' are
1117 # consistent between 2.2 and 2.3.
1118 s3cmd -c "$WORKSPACE/.s3cfg" info "$obj_url"
1119 ret=$?
1120 set -e
1121
1122 case "$ret" in
1123     "0")
1124       print_header "Get sources and prebuilt kernel"
1125       s3cmd -c "$WORKSPACE/.s3cfg" get "$obj_url"
1126       extract_archive_obj
1127
1128       print_header "Select compiler and set build flags"
1129       select_compiler
1130       export_kbuild_flags
1131       ;;
1132
1133     "12")
1134       print_header "Clone kernel sources"
1135
1136       # Build all the things and upload
1137       # then finish the module build...
1138
1139       git_clone_linux_sources
1140       git_export_linux_sources
1141
1142       print_header "Select compiler and set build flags"
1143       select_compiler
1144       export_kbuild_flags
1145
1146       ## PREPARE FULL LINUX SOURCE TREE
1147       print_header "Build kernel from source"
1148       build_linux_kernel
1149
1150       ## EXTRACT DISTRO STYLE KERNEL HEADERS / DEVEL
1151       extract_distro_headers
1152
1153       print_header "Upload kernel to object storage"
1154       tar_archive_obj
1155       upload_archive_obj
1156
1157       ;;
1158
1159     *)
1160       echo "Unknown error? Abort"
1161       exit 1
1162       ;;
1163 esac
1164
1165
1166 ## BUILD modules
1167 # Either we downloaded a pre-build kernel or we built it and uploaded
1168 # the archive for future builds.
1169
1170 cd "$WORKSPACE"
1171
1172 print_header "Build modules against full kernel sources"
1173 build_modules "${LINUX_SRCOBJ_DIR}" "${MODULES_OUTPUT_KSRC_DIR}"
1174
1175 print_header "Build modules against kernel headers"
1176 build_modules "${LINUX_HDROBJ_DIR}" "${MODULES_OUTPUT_KHDR_DIR}"
1177
1178
1179 print_header "Check for built modules in install directory"
1180
1181 # Make sure some modules were actually built
1182 tree "${MODULES_OUTPUT_KSRC_DIR}"
1183 if [ "x$(find "${MODULES_OUTPUT_KSRC_DIR}" -name '*.ko*' -printf yes -quit)" != "xyes" ]; then
1184   echo "No modules built!"
1185   exit 1
1186 fi
1187
1188 tree "${MODULES_OUTPUT_KHDR_DIR}"
1189 if [ "x$(find "${MODULES_OUTPUT_KHDR_DIR}" -name '*.ko*' -printf yes -quit)" != "xyes" ]; then
1190   echo "No modules built!"
1191   exit 1
1192 fi
1193
1194 # EOF