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 debian/rules clean KW_DEFCONFIG_DIR=.
 326
 327         # Hack for kernel Ubuntu-hwe-5.8
 328         # The debian/control file is produced by the clean target above, so this
 329         # check needs to happen afterwards.
 330         if [ ! -f "debian/compat" ] && ! grep -q debhelper-compat debian/control; then
 331             echo "10" > "debian/compat"
 332         fi
 333
 334         # genconfigs check can fail in certain cases, eg. when a more recent
 335         # compiler exposes kernel configuration flags which aren't set in the
 336         # Ubuntu annotations.
 337         # In any case, the configuration will be updated with any missing values
 338         # later in our build script.
 339         fakeroot debian/rules genconfigs KW_DEFCONFIG_DIR=. do_skip_checks=true
 340         cp CONFIGS/"${ubuntu_config}" .config
 341         ;;
 342
 343       *)
 344         # Force 32bit build on i386, default is 64bit
 345         if [ "$arch" = "i386" ]; then
 346             export ARCH="i386"
 347         fi
 348
 349         make "${vanilla_config}" "${make_args[@]}"
 350         ;;
 351     esac
 352
 353     if [ "${vanilla_config}" = "pseries_defconfig" ] && [ "${cross_arch}" = "ppc64el" ] ; then
 354         # @see diff <(git show v3.13:arch/powerpc/configs/pseries_defconfig) <(git show v3.13:arch/powerpc/configs/pseries_le_defconfig)
 355         scripts/config --enable CONFIG_CPU_LITTLE_ENDIAN
 356         scripts/config --enable CONFIG_CMA
 357         scripts/config --disable CONFIG_XMON_DEFAULT
 358         # scripts/config --disable CONFIG_VIRTUALIZATION
 359         # scripts/config --disable CONFIG_KVM_BOOK3S_64
 360         scripts/config --disable CONFIG_KVM_BOOK3S_64_HV
 361     fi
 362
 363     # oldnoconfig was renamed in 4.19
 364     if vergte "$kversion" "4.19"; then
 365         update_conf_target="olddefconfig"
 366     else
 367         update_conf_target="oldnoconfig"
 368     fi
 369
 370     # Fix 'defined(@array)' was removed from recent perl
 371     if [ -f "kernel/timeconst.pl" ]; then
 372       sed -i 's/defined(\@\(.*\))/@\1/' kernel/timeconst.pl
 373     fi
 374
 375     # Fix syntax of inline assembly which is confused with C++11 raw strings on gcc >= 5
 376     if [ "$HOSTCC" != "gcc-4.8" ]; then
 377       if [ -f "arch/x86/kvm/svm.c" ]; then
 378         sed -i 's/ R"/ R "/g; s/"R"/" R "/g' arch/x86/kvm/svm.c
 379       fi
 380
 381       if [ -f "arch/x86/kvm/vmx.c" ]; then
 382         sed -i 's/ R"/ R "/g; s/"R"/" R "/g' arch/x86/kvm/vmx.c
 383       fi
 384     fi
 385
 386     if { verlt "${kversion}" "5.11"; } && { vergte "${kversion}" "4.10"; } ; then
 387         # Binutils > 2.35 strips empty symbol tables, causing obltool to fail
 388         # in certain cases when files are empty.
 389         # @see https://gitlab.com/linux-kernel/stable/-/commit/1d489151e9f9d1647110277ff77282fe4d96d09b
 390         #
 391         # There doesn't seem to be any LD/AS/AR flags to control this behaviour,
 392         # therefore patching tools/objtool/elf.c is attempted.
 393         patch_linux_kernel 1d489151e9f9d1647110277ff77282fe4d96d09b
 394         if { verlt "${kversion}" "4.18"; } ; then
 395             patch_linux_kernel e81e0724432542af8d8c702c31e9d82f57b1ff31
 396         fi
 397     fi
 398
 399     if { vergt "${selected_cc_version}" "7"; } && { vergte "${kversion}" "4.14"; } && { verlt "${kversion}" "4.17"; } ; then
 400         # Builds fail due to -Werror=restrict in pager.o and str_error_r.o
 401         if { verlt "${kversion}" "4.16"; } ; then
 402             # This is patched since objtool's Makefile doesn't respect HOSTCFLAGS
 403             # @see https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ad343a98e74e85aa91d844310e797f96fee6983b
 404             patch_linux_kernel ad343a98e74e85aa91d844310e797f96fee6983b
 405         fi
 406         if { verlt "${kversion}" "4.17"; } ; then
 407             # This is patched since objtool's Makefile doesn't respect HOSTCFLAGS
 408             # @see https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=854e55ad289ef8888e7991f0ada85d5846f5afb9
 409             patch_linux_kernel 854e55ad289ef8888e7991f0ada85d5846f5afb9
 410         fi
 411
 412     fi
 413
 414     if { vergt "${selected_cc_version}" "9"; } && { verlt "${kversion}" "5.6"; } ; then
 415         # Duplicate decalarations of __force_order
 416         # @see https://gitlab.com/linux-kernel/stable/-/commit/df6d4f9db79c1a5d6f48b59db35ccd1e9ff9adfc
 417         # However, kaslr_64.c doesn't exit in 4.15, 4.16, it's named pagetable.c
 418         if [ -f arch/x86/boot/compressed/pagetable.c ] ; then
 419             sed -i '/^unsigned long __force_order;$/d' arch/x86/boot/compressed/pagetable.c
 420         fi
 421         if [ -f arch/x86/boot/compressed/kaslr_64.c ] ; then
 422             patch_linux_kernel df6d4f9db79c1a5d6f48b59db35ccd1e9ff9adfc
 423         fi
 424     fi
 425
 426     if { vergte "${kversion}" "4.18"; } && { verlt "${kversion}" "4.19"; } ; then
 427         # In some cases, compiling net/bpfilter can fail with the following error:
 428         #   net/bpfilter/main.c:9:10: fatal error: include/uapi/linux/bpf.h: No such file or directory
 429         #   make[2]: *** [scripts/Makefile.host:107: net/bpfilter/main.o] Error 1
 430         #
 431         # While the issue is potentially in a number of old versions, it has only
 432         # been observed in v4.18-rt
 433         #
 434         patch_linux_kernel 303a339f30a9441c4695d3d2cc78f1b33cd959ff
 435     fi
 436
 437     if { vergte "${kversion}" "4.18"; } && { verlt "${kversion}" "4.19"; } ; then
 438         # In some cases, compiling net/bpfilter can fail with the following error:
 439         #   net/bpfilter/main.c:9:10: fatal error: include/uapi/linux/bpf.h: No such file or directory
 440         #   make[2]: *** [scripts/Makefile.host:107: net/bpfilter/main.o] Error 1
 441         #
 442         # While the issue is potentially in a number of old versions, it has only
 443         # been observed in v4.18-rt
 444         #
 445         patch_linux_kernel 303a339f30a9441c4695d3d2cc78f1b33cd959ff
 446     fi
 447
 448     if { vergte "${kversion}" "4.15"; } && { verlt "${kversion}" "4.18"; } ; then
 449         # Some old kernels fail to build when make is too new
 450         # @see https://gitlab.com/linux-kernel/stable/-/commit/9feeb638cde083c737e295c0547f1b4f28e99583
 451         patch_linux_kernel 9564a8cf422d7b58f6e857e3546d346fa970191e
 452     fi
 453
 454     if { vergte "${kversion}" "4.14"; } && { verlt "${kversion}" "4.14.55"; } ; then
 455         # Some old kernels fail to build when make is too new
 456         # @see https://gitlab.com/linux-kernel/stable/-/commit/9feeb638cde083c737e295c0547f1b4f28e99583
 457         patch_linux_kernel e82885490a611f2b75a6c27cd7bb09665c1740be
 458     fi
 459
 460     if ( { vergte "${kversion}" "4.15"; } && { verlt "${kversion}" "4.18"; } ) || \
 461        ( { vergte "${kversion}" "4.14"; } && { verlt "${kversion}" "4.14.56"; } ) ; then
 462         # Some old kernels fail to build when make is too new
 463         # @see https://gitlab.com/linux-kernel/stable/-/commit/9feeb638cde083c737e295c0547f1b4f28e99583
 464         patch_linux_kernel 9feeb638cde083c737e295c0547f1b4f28e99583
 465     fi
 466
 467     if ( { vergte "${kversion}" "4.12"; } && { verlt "${kversion}" "4.20.17"; } ) || \
 468        ( { vergte "${kversion}" "5.0"; } && { verlt "${kversion}" "5.0.12"; } ) ; then
 469         # Old kernels can fail to build while on newer host kernels with errors
 470         # such as:
 471         #   In file included from scripts/selinux/genheaders/genheaders.c:19:
 472         #   ./security/selinux/include/classmap.h:249:2: error: #error New address family defined, please update secclass_map.
 473         # @see https://gitlab.com/linux-kernel/stable/-/commit/dfbd199a7cfe3e3cd8531e1353cdbd7175bfbc5e
 474         #
 475         patch_linux_kernel dfbd199a7cfe3e3cd8531e1353cdbd7175bfbc5e
 476     fi
 477
 478     # Compatibility with binutils >= ~ 2.31
 479     if { vergte "${kversion}" "3.19"; } && { verlt "${kversion}" "4.16"; } ; then
 480         patch_linux_kernel b21ebf2fb4cde1618915a97cc773e287ff49173e
 481     fi
 482     if { vergte "${kversion}" "3.17"; } && { verlt "${kversion}" "3.18.69"; } ; then
 483         patch_linux_kernel edb9d2d5e647e7a8521b0d35f8452deb02dfd138
 484     fi
 485     if { vergte "${kversion}" "3.17"; } && { verlt "${kversion}" "3.18.100"; } ; then
 486         patch_linux_kernel 3be6583f0b6f1bf1ee650ebf473d9dee36836527
 487         patch_linux_kernel 12d839211d080f6a9c370398c41a260365d34c62
 488     fi
 489     if { vergte "${kversion}" "3.16"; } && { verlt "${kversion}" "3.16.82"; } ; then
 490         patch_linux_kernel ad10e6d464796f2a481de4039a43b9cfca034e1c
 491     fi
 492
 493     if ( { vergte "${kversion}" "3.14"; } && { verlt "${kversion}" "4.4"; } ) ||
 494        ( { vergte "${kversion}" "4.8"; } && { verlt "${kversion}" "4.18"; } ); then
 495         # While the original motivation of this patch is for fixing builds using
 496         # clang, the same error occurs between linux >= 3.14 and < 4.4, and in
 497         # 4.15, 4.16.
 498         # For rt-linux, the error has been observed in 4.8, 4.11, and 4.13.
 499         #
 500         # This patch only partially applies due to changes in kernel/Makefile,
 501         # so a supplementary patch is needed
 502         #
 503         # Without this patch, builds fail with
 504         #   Cannot find symbol for section 2: .text.
 505         #   kernel/elfcore.o: failed
 506         #
 507         # @see https://github.com/linuxppc/issues/issues/388
 508         # @see https://lore.kernel.org/lkml/20201204165742.3815221-2-arnd@kernel.org/
 509         #
 510         patch_linux_kernel 6e7b64b9dd6d96537d816ea07ec26b7dedd397b9
 511         if grep -q elfcore.o kernel/Makefile ; then
 512             sed -i '/^.* += elfcore.o$/d' kernel/Makefile
 513         fi
 514     fi
 515     # Same as above for the v4.4 branch
 516     if ( { vergte "${kversion}" "4.4"; } && { verlt "${kversion}" "4.4.257"; } ); then
 517         patch_linux_kernel 3140b0740b31cc63cf2ee08bc3f746b423eb068d
 518         if grep -q elfcore.o kernel/Makefile ; then
 519             sed -i '/^.* += elfcore.o$/d' kernel/Makefile
 520         fi
 521     fi
 522
 523     if { vergte "${kversion}" "4.5"; } && { verlt "${kversion}" "4.8"; } ; then
 524         # Kernels between v4.5 and v4.8 built with gcc >= 8 on arm will hit an
 525         # assembler error :
 526         #
 527         #  kernel/.tmp_fork.s: Assembler messages:
 528         #  kernel/.tmp_fork.s:1790: Error: .err encountered
 529         #
 530         # @see https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85745
 531         #
 532         patch_linux_kernel 9f73bd8bb445e0cbe4bcef6d4cfc788f1e184007
 533     fi
 534
 535     if ( { vergte "${kversion}" "4.4"; } && { verlt "${kversion}" "4.4.136"; } ) ||
 536        ( { vergte "${kversion}" "4.5"; } && { verlt "${kversion}" "4.8"; } ); then
 537         # Hacky patch to deal with the following build error:
 538         #   Cannot find symbol for section 7: .text.unlikely.
 539         #   kernel/kexec_file.o: failed
 540         #   make[1]: *** [scripts/Makefile.build:291: kernel/kexec_file.o] Error 1
 541         #
 542         # This error happens with binutils 2.36 and 2.37, but should probably not
 543         # be an issue with binutils 2.38.
 544         # @see https://github.com/linuxppc/issues/issues/388
 545         # @see https://github.com/bminor/binutils-gdb/commit/c09c8b42021180eee9495bd50d8b35e683d3901b
 546         #
 547         # There is some sort of config (unspecified in past discussions) which
 548         # provokes the error, and there was never a potential fix merged in
 549         # this discussion, in part because the build systems of the kernel
 550         # switched to objtool instead.
 551         #
 552         # @see https://lore.kernel.org/all/20210215162209.5e2a475b@gandalf.local.home/
 553         #
 554         sed -i 's/return txtname;/return shdr0->sh_size ? txtname : NULL;/' scripts/recordmcount.h
 555
 556         # After applying the above patch, the build continues but fails with
 557         # head64.c:(.text.exit+0x5): undefined reference to `__gcov_exit'
 558         #
 559         scripts/config --disable CONFIG_GCOV_KERNEL
 560     fi
 561
 562     if { vergte "${kversion}" "4.5"; } && { verlt "${kversion}" "4.5.5"; } ; then
 563         # drivers/staging/wilc1000/wilc_spi.c:123:34: error: storage size of ‘wilc1000_spi_ops’ isn’t known
 564         patch_linux_kernel ce7b516f3f9e11fe4ee06fad0d7e853bb6e8f160
 565     fi
 566
 567     # Newer binutils don't accept 3 operand 'cmp' instructions on ppc64
 568     # Convert them to 'cmpw' which was previously done silently
 569     if verlt "$kversion" "4.9"; then
 570         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/"
 571         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/"
 572         sed -i "s/\$pie \-o \"\$ofile\"/\$pie --no-dynamic-linker -o \"\$ofile\"/" arch/powerpc/boot/wrapper
 573     fi
 574
 575     if [ "$(scripts/config --state CONFIG_EXTCON_ADC_JACK)" != "n" ] &&
 576            ( { vergte "${kversion}" "4.2"; } && { verlt "${kversion}" "4.12"; } ); then
 577         # 73b6ecdb93e8e77752cae9077c424fcdc6f23c39 introduced a change where
 578         # extcon-adc-jack.h has an incompatible pointer type.
 579         # In GCC >= 5 this will provoke a warning and build failure.
 580         # Eg.
 581         #   drivers/extcon/extcon-adc-jack.c: In function ‘adc_jack_probe’:
 582         #   drivers/extcon/extcon-adc-jack.c:111:64: error: passing argument 2 of ‘devm_extcon_dev_allocate’ from incompatible pointer type [-Werror=incompatible-pointer-types]
 583         #   make[2]: *** [scripts/Makefile.build:295: drivers/extcon/extcon-adc-jack.o] Error 1
 584         #
 585         # 8a522bf2d4f788306443d36b26b54f0aedcdfdbe (in 4.11) has a fix for this warning
 586         #
 587         patch_linux_kernel 8a522bf2d4f788306443d36b26b54f0aedcdfdbe
 588     fi
 589
 590     if ( { vergte "${kversion}" "4.15"; } && { verlt "${kversion}" "4.15.2"; } ) || \
 591        ( { vergte "${kversion}" "4.14"; } && { verlt "${kversion}" "4.14.18"; } ) ; then
 592         # Fix an objtool Segmentation fault
 593         patch_linux_kernel dd12561854824fd1f05baf2a1b794faa046e2425
 594     fi
 595
 596     if { vergte "${kversion}" "4.14"; } && { verlt "${kversion}" "4.14.268"; } ; then
 597         # Builds fail due to -Werror=use-after-free in sigchain.o and help.o
 598         patch_linux_kernel e89bb266b710ce056f141f29f091fd468a4a8185
 599     fi
 600
 601     # Fix a typo in v2.6.36.x
 602     if [ -f "arch/x86/kernel/entry_64.S" ]; then
 603       sed -i 's/END(do_hypervisor_callback)/END(xen_do_hypervisor_callback)/' arch/x86/kernel/entry_64.S
 604     fi
 605
 606     # Fix compiler switch in vdso Makefile for 2.6.36 to 2.6.36.2
 607     if { vergte "$kversion" "2.6.36" && verlte "$kversion" "2.6.36.3"; }; then
 608       sed -i 's/-m elf_x86_64/-m64/' arch/x86/vdso/Makefile
 609       sed -i 's/-m elf_i386/-m32/' arch/x86/vdso/Makefile
 610     fi
 611
 612     # Fix kernel < 3.0 with gcc >= 4.7
 613     if verlt "$kversion" "3.0"; then
 614       sed -i '/linux\/compiler.h/a #include <linux\/linkage.h> \/* For asmregparm *\/' arch/x86/include/asm/ptrace.h
 615       sed -i 's/extern long syscall_trace_enter/extern asmregparm long syscall_trace_enter/' arch/x86/include/asm/ptrace.h
 616       sed -i 's/extern void syscall_trace_leave/extern asmregparm void syscall_trace_leave/' arch/x86/include/asm/ptrace.h
 617       echo "header-y += linkage.h" >> include/linux/Kbuild
 618     fi
 619
 620     if [ "${cross_arch}" = "powerpc" ] ; then
 621         if { vergte "${kversion}" "4.15"; } && { verlt "${kversion}" "4.16"; } ; then
 622             # Avoid register errors such as
 623             # aes_generic.c:(.text+0x4e0): undefined reference to `_restgpr_31_x'
 624             # @see https://gitlab.com/linux-kernel/stable/-/commit/148b974deea927f5dbb6c468af2707b488bfa2de
 625             make_args+=(
 626                 CFLAGS_aes_generic.o=''
 627             )
 628         fi
 629     fi
 630
 631     if [ "$(scripts/config --state CONFIG_DEBUG_INFO_BTF)" == "y" ] &&
 632            { vergte "${pahole_version}" "1.24"; } &&
 633            { vergte "${kversion}" "5.10"; } && { verlt "${kversion}" "6.0"; } ;then
 634         # Some kernels Eg. Ubuntu-hwe-5.13-5.13.0-52.59_20.04.1
 635         # fail with the following error:
 636         #   BTFIDS  vmlinux
 637         #   FAILED: load BTF from vmlinux: Invalid argument
 638         #
 639         # When CONFIG_DEBUG_INFO_BTF is set, certain versions of pahole require
 640         # `--skip_encoding_btf_enum64` to be passed as the kernel doesn't define
 641         # BTF_KIND_ENUM64.
 642         #
 643         # Introduced in 341dfcf8d78eaa3a2dc96dea06f0392eb2978364 (~v5.10)
 644         # @see https://lore.kernel.org/bpf/20220825171620.cioobudss6ovyrkc@altlinux.org/t/
 645         #
 646         if [ -f "scripts/pahole-flags.sh" ] ; then
 647             # shellcheck disable=SC2016
 648             sed -i 's/ -J ${PAHOLE_FLAGS} / -J ${PAHOLE_FLAGS} --skip_encoding_btf_enum64 /' scripts/link-vmlinux.sh
 649         else
 650             # shellcheck disable=SC2016
 651             sed -i 's/ -J ${extra_paholeopt} / -J ${extra_paholeopt} --skip_encoding_btf_enum64 /' scripts/link-vmlinux.sh
 652         fi
 653     fi
 654
 655     # GCC 4.8
 656     if [ "$HOSTCC" == "gcc-4.8" ]; then
 657         scripts/config --disable CONFIG_CC_STACKPROTECTOR_STRONG
 658         scripts/config --disable CONFIG_PPC_OF_BOOT_TRAMPOLINE
 659     fi
 660
 661     # Don't try to sign modules
 662     scripts/config --disable CONFIG_MODULE_SIG
 663
 664     # Disable kernel stack frame correctness validation, introduced in 4.6.0 and currently fails
 665     scripts/config --disable CONFIG_STACK_VALIDATION
 666
 667     # Cause problems with inline assembly on i386
 668     scripts/config --disable CONFIG_DEBUG_SECTION_MISMATCH
 669
 670     # Don't build samples, they are broken on some kernel releases
 671     scripts/config --disable CONFIG_SAMPLES
 672     scripts/config --disable CONFIG_BUILD_DOCSRC
 673
 674     # Disable kcov
 675     scripts/config --disable CONFIG_KCOV
 676
 677     # Broken on some RT kernels
 678     scripts/config --disable CONFIG_HYPERV
 679
 680     # Broken drivers
 681     scripts/config --disable CONFIG_RAPIDIO_TSI721
 682     scripts/config --disable CONFIG_SGI_XP
 683     scripts/config --disable CONFIG_MFD_WM8994
 684     scripts/config --disable CONFIG_DRM_RADEON
 685     scripts/config --disable CONFIG_SND_SOC_WM5100
 686     # More recent compiler optimizations (from gcc 8 onwards )expose build errors
 687     # with netronome on older kernels.
 688     # Observed in 4.11-rt, 4.15-4.17, 5.0-rt - 5.16-rt
 689     # It seems easier to disable the driver than to attempt patching.
 690     # Eg.
 691     #   In function ‘ur_load_imm_any’,
 692     #   inlined from ‘jeq_imm’ at drivers/net/ethernet/netronome/nfp/bpf/jit.c:3146:13:
 693     #   ./include/linux/compiler.h:350:45: error: call to ‘__compiletime_assert_1062’ declared with attribute error: FIELD_FIT: value too large for the field
 694     #   350 |         _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
 695     #
 696     scripts/config --disable CONFIG_NET_VENDOR_NETRONOME
 697     # Eg.
 698     #  In function ‘memcpy’,
 699     #  inlined from ‘kszphy_get_strings’ at drivers/net/phy/micrel.c:664:3:
 700     #  ./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
 701     #  305 |                         __read_overflow2();
 702     #      |                         ^~~~~~~~~~~~~~~~~~
 703     #  make[3]: *** [scripts/Makefile.build:308: drivers/net/phy/micrel.o] Error 1
 704     #
 705     scripts/config --disable CONFIG_MICREL_PHY
 706
 707
 708     # IGBVF won't build with recent gcc on 2.6.38.x
 709     if { vergte "$kversion" "2.6.37" && verlt "$kversion" "2.6.38"; }; then
 710       scripts/config --disable CONFIG_IGBVF
 711     fi
 712
 713     # Don't fail the build on warnings
 714     scripts/config --disable CONFIG_WERROR
 715     scripts/config --enable CONFIG_PPC_DISABLE_WERROR
 716
 717     # Set required options
 718     scripts/config --enable CONFIG_TRACEPOINTS
 719     scripts/config --enable CONFIG_KALLSYMS
 720     scripts/config --enable CONFIG_HIGH_RES_TIMERS
 721     scripts/config --enable CONFIG_KPROBES
 722     scripts/config --enable CONFIG_FTRACE
 723     scripts/config --enable CONFIG_BLK_DEV_IO_TRACE
 724     scripts/config --enable CONFIG_KALLSYMS_ALL
 725     scripts/config --enable CONFIG_HAVE_SYSCALL_TRACEPOINTS
 726     scripts/config --enable CONFIG_PERF_EVENTS
 727     scripts/config --enable CONFIG_EVENT_TRACING
 728     scripts/config --enable CONFIG_KRETPROBES
 729
 730     if [ -n "${DEBUG}" ] ; then
 731         cat .config
 732     fi
 733
 734     make "$update_conf_target" "${make_args[@]}"
 735     make -j"$NPROC" "${make_args[@]}"
 736
 737     krelease=$(make -s kernelrelease "${make_args[@]}")
 738
 739     # Save the kernel and modules
 740     mkdir -p "$LINUX_INSTOBJ_DIR/boot"
 741     make INSTALL_MOD_PATH="$LINUX_INSTOBJ_DIR" INSTALL_MOD_STRIP=1 modules_install "${make_args[@]}"
 742     make INSTALL_MOD_PATH="$LINUX_INSTOBJ_DIR" INSTALL_PATH="$LINUX_INSTOBJ_DIR/boot" install "${make_args[@]}"
 743     rm -f "$LINUX_INSTOBJ_DIR/lib/modules/${krelease}/source" "$LINUX_INSTOBJ_DIR/lib/modules/${krelease}/build"
 744     ln -s ../../../../sources "$LINUX_INSTOBJ_DIR/lib/modules/${krelease}/source"
 745     ln -s ../../../../sources "$LINUX_INSTOBJ_DIR/lib/modules/${krelease}/source"
 746 }
 747
 748
 749 extract_distro_headers() {
 750
 751     # Enter linux source dir
 752     cd "${LINUX_SRCOBJ_DIR}"
 753
 754
 755     # For RT kernels, copy version file
 756     if [ -s localversion-rt ]; then
 757         cp -a localversion-rt "${LINUX_HDROBJ_DIR}"
 758     fi
 759
 760     # Copy all Makefile related stuff
 761     find . -path './include/*' -prune \
 762         -o -path './scripts/*' -prune -o -type f \
 763         \( -name 'Makefile*' -o -name 'Kconfig*' -o -name 'Kbuild*' -o \
 764             -name '*.sh' -o -name '*.pl' -o -name '*.lds' \) \
 765         -print | cpio -pd --preserve-modification-time "${LINUX_HDROBJ_DIR}"
 766
 767     # Copy base scripts and include dirs
 768     cp -a scripts include "${LINUX_HDROBJ_DIR}"
 769
 770     # Copy arch includes
 771     (find arch -name include -type d -print0 | \
 772         xargs -0 -n1 -I '{}' find '{}' -type f) | \
 773         cpio -pd --preserve-modification-time "${LINUX_HDROBJ_DIR}"
 774
 775     # Copy arch scripts
 776     (find arch -name scripts -type d -print0 | \
 777         xargs -0 -n1 -I '{}' find '{}' -type f) | \
 778         cpio -pd --preserve-modification-time "${LINUX_HDROBJ_DIR}"
 779
 780     # Cleanup scripts
 781     rm -f "${LINUX_HDROBJ_DIR}/scripts/*.o"
 782     rm -f "${LINUX_HDROBJ_DIR}/scripts/*/*.o"
 783
 784     # On powerpc 32bits this object is required to link modules
 785     if [ "${karch}" = "powerpc" ]; then
 786         if [ "$(scripts/config -s CONFIG_PPC64)" = "y" ] && vergte "${kversion}" "5.4"; then
 787             :
 788         else
 789             cp -a --parents arch/powerpc/lib/crtsavres.[So] "${LINUX_HDROBJ_DIR}/"
 790         fi
 791     fi
 792
 793     # On arm64 between 4.13 and 1.15 this object is required to build with ftrace support
 794     if [ "${karch}" = "arm64" ]; then
 795         if [ -f "arch/arm64/kernel/ftrace-mod.S" ]; then
 796             cp -a --parents arch/arm64/kernel/ftrace-mod.[So] "${LINUX_HDROBJ_DIR}/"
 797         fi
 798     fi
 799
 800     # On riscv with 5.14 the vsdo objects are required
 801     if [ "${karch}" = "riscv" ] && \
 802            ( { vergte "${kversion}" "5.14"; } && { verlt "${kversion}" "5.15"; } ); then
 803             cp -a --parents arch/riscv/kernel/vdso/*.o "${LINUX_HDROBJ_DIR}/"
 804     fi
 805
 806     # Newer kernels need objtool to build modules when CONFIG_STACK_VALIDATION=y
 807     if [ -f tools/objtool/objtool ]; then
 808       cp -a --parents tools/objtool/objtool "${LINUX_HDROBJ_DIR}/"
 809     fi
 810
 811     if [ -f "arch/x86/kernel/macros.s" ]; then
 812       cp -a --parents arch/x86/kernel/macros.s "${LINUX_HDROBJ_DIR}/"
 813     fi
 814
 815     # Copy modules related stuff, if available
 816     if [ -s Module.symvers ]; then
 817         cp Module.symvers "${LINUX_HDROBJ_DIR}"
 818     fi
 819
 820     if [ -s System.map ]; then
 821         cp System.map "${LINUX_HDROBJ_DIR}"
 822     fi
 823
 824     if [ -s Module.markers ]; then
 825         cp Module.markers "${LINUX_HDROBJ_DIR}"
 826     fi
 827
 828     # Copy config file
 829     cp .config "${LINUX_HDROBJ_DIR}"
 830
 831     # Make sure the Makefile and version.h have a matching timestamp so that
 832     # external modules can be built
 833     if [ -s "${LINUX_HDROBJ_DIR}/include/generated/uapi/linux/version.h" ]; then
 834         touch -r "${LINUX_HDROBJ_DIR}/Makefile" "${LINUX_HDROBJ_DIR}/include/generated/uapi/linux/version.h"
 835     elif [ -s "${LINUX_HDROBJ_DIR}/include/linux/version.h" ]; then
 836         touch -r "${LINUX_HDROBJ_DIR}/Makefile" "${LINUX_HDROBJ_DIR}/include/linux/version.h"
 837     else
 838         echo "Missing version.h"
 839         exit 1
 840     fi
 841     touch -r "${LINUX_HDROBJ_DIR}/.config" "${LINUX_HDROBJ_DIR}/include/generated/autoconf.h"
 842
 843     # Copy .config to include/config/auto.conf so "make prepare" is unnecessary.
 844     if [ ! -f "${LINUX_HDROBJ_DIR}/include/config/auto.conf" ]; then
 845         cp "${LINUX_HDROBJ_DIR}/.config" "${LINUX_HDROBJ_DIR}/include/config/auto.conf"
 846     fi
 847
 848     # Finally clean the object files from the full source tree
 849     make clean
 850
 851     # And regen the modules support files
 852     make modules_prepare "${make_args[@]}"
 853
 854     # On powerpc 32bits this object is required to link modules
 855     if [ "${karch}" = "powerpc" ]; then
 856         if [ "$(scripts/config -s CONFIG_PPC64)" = "y" ] && vergte "${kversion}" "5.4"; then
 857             :
 858         else
 859             make arch/powerpc/lib/crtsavres.o "${make_args[@]}"
 860         fi
 861     fi
 862
 863     # On arm64 between 4.13 and 4.15 this object is required to build with ftrace support
 864     if [ "${karch}" = "arm64" ]; then
 865         if [ -f "arch/arm64/kernel/ftrace-mod.S" ]; then
 866             make arch/arm64/kernel/ftrace-mod.o "${make_args[@]}"
 867         fi
 868     fi
 869
 870     # Version specific tasks
 871     case "$ktag" in
 872       Ubuntu*)
 873         # Add Ubuntu ABI number to kernel headers, this is normally done by the packaging code
 874         ABINUM="$(echo "$ktag" | grep -P -o 'Ubuntu-(lts-)?.*-\K\d+(?=\..*)')"
 875         echo "#define UTS_UBUNTU_RELEASE_ABI $ABINUM" >> include/generated/utsrelease.h
 876         echo "#define UTS_UBUNTU_RELEASE_ABI $ABINUM" >> "${LINUX_HDROBJ_DIR}/include/generated/utsrelease.h"
 877         ;;
 878     esac
 879 }
 880
 881
 882 build_modules() {
 883
 884     local kdir="$1"
 885     local outdir="$2"
 886     local kversion
 887
 888     kversion=$(make -C "$LINUX_HDROBJ_DIR" -s kernelversion)
 889
 890     # Try to catch some compatibility problems by turning some
 891     # warnings into errors.
 892     #export KCFLAGS="$KCFLAGS -Wall -Werror"
 893
 894     # Enter lttng-modules source dir
 895     cd "${MODULES_GIT_DIR}"
 896
 897     # kernels 3.10 to 3.10.13 and 3.11 to 3.11.2 introduce a deadlock in the
 898     # timekeeping subsystem. We want those build to fail.
 899     if { vergte "$kversion" "3.10" && verlte "$kversion" "3.10.13"; } || \
 900        { vergte "$kversion" "3.11" && verlte "$kversion" "3.11.2"; }; then
 901
 902         set +e
 903
 904         # Build modules
 905         KERNELDIR="${kdir}" make -j"${NPROC}" V=1 "${make_args[@]}"
 906         ret=$?
 907
 908         set -e
 909
 910         # We expect this build to fail, if it doesn't, fail the job.
 911         if [ "$ret" -eq 0 ]; then
 912             echo "This build should have failed."
 913             exit 1
 914         fi
 915
 916         # We have to publish at least one file or the build will fail
 917         echo "This kernel is broken, there is a deadlock in the timekeeping subsystem." > "${outdir}/BROKEN.txt.ko"
 918
 919         KERNELDIR="${kdir}" make clean
 920
 921     else # Regular build
 922
 923         # Build modules against full kernel sources
 924         KERNELDIR="${kdir}" make -j"${NPROC}" V=1 "${make_args[@]}"
 925
 926         # Install modules to build dir
 927         KERNELDIR="${kdir}" make INSTALL_MOD_PATH="${outdir}" modules_install
 928
 929         # Clean build dir
 930         KERNELDIR="${kdir}" make clean
 931     fi
 932 }
 933
 934
 935 ## MAIN ##
 936
 937 # Use all CPU cores
 938 NPROC=$(nproc)
 939
 940 MODULES_GIT_DIR="${WORKSPACE}/src/lttng-modules"
 941 LINUX_GIT_DIR="${WORKSPACE}/src/linux"
 942
 943 LINUX_OBJ_DIR="${WORKSPACE}/linux"
 944 LINUX_SRCOBJ_DIR="${LINUX_OBJ_DIR}/sources"
 945 LINUX_HDROBJ_DIR="${LINUX_OBJ_DIR}/headers"
 946 LINUX_INSTOBJ_DIR="${LINUX_OBJ_DIR}/install"
 947
 948 MODULES_OUTPUT_KSRC_DIR="${WORKSPACE}/build/lttng-modules-ksrc"
 949 MODULES_OUTPUT_KHDR_DIR="${WORKSPACE}/build/lttng-modules-khdr"
 950
 951 LINUX_GIT_REF_REPO_DIR="$HOME/gitcache/linux-stable.git/"
 952
 953 OBJ_STORE_URL="s3://jenkins"
 954
 955 cd "$WORKSPACE"
 956
 957 # Create build directories
 958 mkdir -p "${LINUX_SRCOBJ_DIR}" "${LINUX_HDROBJ_DIR}" "${LINUX_INSTOBJ_DIR}" "${MODULES_OUTPUT_KSRC_DIR}" "${MODULES_OUTPUT_KHDR_DIR}"
 959
 960 print_header "Clone LTTng-modules sources"
 961 git_clone_modules_sources
 962
 963 # Setup cross compile env if available
 964 if [ "x${cross_arch}" != "x" ]; then
 965
 966     case "$cross_arch" in
 967         "armhf")
 968             karch="arm"
 969             cross_compile="arm-linux-gnueabihf-"
 970             vanilla_config="imx_v6_v7_defconfig"
 971             ubuntu_config="armhf-config.flavour.generic"
 972             ;;
 973
 974         "arm64")
 975             karch="arm64"
 976             cross_compile="aarch64-linux-gnu-"
 977             vanilla_config="defconfig"
 978             ubuntu_config="arm64-config.flavour.generic"
 979             ;;
 980
 981         "powerpc")
 982             karch="powerpc"
 983             cross_compile="powerpc-linux-gnu-"
 984             vanilla_config="ppc44x_defconfig"
 985             ubuntu_config="powerpc-config.flavour.powerpc-smp"
 986             ;;
 987
 988         "ppc64el")
 989             karch="powerpc"
 990             cross_compile="powerpc64le-linux-gnu-"
 991             vanilla_config="pseries_le_defconfig"
 992             ubuntu_config="ppc64el-config.flavour.generic"
 993             ;;
 994
 995         "riscv64")
 996             karch="riscv"
 997             cross_compile="riscv64-linux-gnu-"
 998             vanilla_config="defconfig"
 999             ubuntu_config="riscv64-config.flavour.generic"
1000             ;;
1001
1002         *)
1003             echo "Unsupported cross arch $cross_arch"
1004             exit 1
1005             ;;
1006     esac
1007
1008     # Export variables used by Kbuild for cross compilation
1009     export ARCH="${karch}"
1010     export CROSS_COMPILE="${cross_compile}"
1011
1012 # Set arch specific values if we are not cross compiling
1013 elif [ "x${arch}" != "x" ]; then
1014
1015     case "$arch" in
1016         "i386")
1017             karch="x86"
1018             vanilla_config="allmodconfig"
1019             ubuntu_config="i386-config.flavour.generic"
1020             ;;
1021
1022         "amd64")
1023             karch="x86"
1024             vanilla_config="allmodconfig"
1025             ubuntu_config="amd64-config.flavour.generic"
1026             ;;
1027
1028         "armhf")
1029             karch="arm"
1030             vanilla_config="allmodconfig"
1031             ubuntu_config="armhf-config.flavour.generic"
1032             ;;
1033
1034         "arm64")
1035             karch="arm64"
1036             vanilla_config="allmodconfig"
1037             ubuntu_config="arm64-config.flavour.generic"
1038             ;;
1039
1040         "powerpc")
1041             karch="powerpc"
1042             vanilla_config="allmodconfig"
1043             ubuntu_config="powerpc-config.flavour.powerpc-smp"
1044             ;;
1045
1046         "ppc64el")
1047             karch="powerpc"
1048             vanilla_config="allmodconfig"
1049             ubuntu_config="ppc64el-config.flavour.generic"
1050             ;;
1051
1052         "riscv64")
1053             karch="riscv"
1054             vanilla_config="allmodconfig"
1055             ubuntu_config="riscv64-config.flavour.generic"
1056             ;;
1057
1058         *)
1059             echo "Unsupported arch $arch"
1060             exit 1
1061             ;;
1062     esac
1063 else
1064     echo "No arch or cross_arch specified"
1065     exit 1
1066 fi
1067
1068
1069
1070 # First get the kernel build from the object store, or build it, if it's
1071 # not available.
1072
1073 set +x
1074 echo "# Setup endpoint
1075 host_base = obj.internal.efficios.com
1076 host_bucket = obj.internal.efficios.com
1077 bucket_location = us-east-1
1078 use_https = True
1079
1080 # Setup access keys
1081 access_key = jenkins
1082 secret_key = echo123456
1083
1084 # Enable S3 v4 signature APIs
1085 signature_v2 = False" > "$WORKSPACE/.s3cfg"
1086 set -x
1087
1088 url_hash="$(echo -n "$kgitrepo" | md5sum | awk '{ print $1 }')"
1089 obj_name="linux.tar.bz2"
1090
1091 if [ -z "${cross_arch}" ]; then
1092     obj_url_prefix="$OBJ_STORE_URL/linux-build/$url_hash/$ktag/platform-${platform}/$arch/native"
1093 else
1094     obj_url_prefix="$OBJ_STORE_URL/linux-build/$url_hash/$ktag/platform-${platform}/${cross_arch}"
1095 fi
1096
1097 obj_url="$obj_url_prefix/$obj_name"
1098
1099 set +e
1100 # In s3cmd 2.3, the return code of get when an object does not exist (64)
1101 # is different than in 2.2 (12). The return codes of 's3cmd info' are
1102 # consistent between 2.2 and 2.3.
1103 s3cmd -c "$WORKSPACE/.s3cfg" info "$obj_url"
1104 ret=$?
1105 set -e
1106
1107 case "$ret" in
1108     "0")
1109       print_header "Get sources and prebuilt kernel"
1110       s3cmd -c "$WORKSPACE/.s3cfg" get "$obj_url"
1111       extract_archive_obj
1112
1113       print_header "Select compiler and set build flags"
1114       select_compiler
1115       export_kbuild_flags
1116       ;;
1117
1118     "12")
1119       print_header "Clone kernel sources"
1120
1121       # Build all the things and upload
1122       # then finish the module build...
1123
1124       git_clone_linux_sources
1125       git_export_linux_sources
1126
1127       print_header "Select compiler and set build flags"
1128       select_compiler
1129       export_kbuild_flags
1130
1131       ## PREPARE FULL LINUX SOURCE TREE
1132       print_header "Build kernel from source"
1133       build_linux_kernel
1134
1135       ## EXTRACT DISTRO STYLE KERNEL HEADERS / DEVEL
1136       extract_distro_headers
1137
1138       print_header "Upload kernel to object storage"
1139       tar_archive_obj
1140       upload_archive_obj
1141
1142       ;;
1143
1144     *)
1145       echo "Unknown error? Abort"
1146       exit 1
1147       ;;
1148 esac
1149
1150
1151 ## BUILD modules
1152 # Either we downloaded a pre-build kernel or we built it and uploaded
1153 # the archive for future builds.
1154
1155 cd "$WORKSPACE"
1156
1157 print_header "Build modules against full kernel sources"
1158 build_modules "${LINUX_SRCOBJ_DIR}" "${MODULES_OUTPUT_KSRC_DIR}"
1159
1160 print_header "Build modules against kernel headers"
1161 build_modules "${LINUX_HDROBJ_DIR}" "${MODULES_OUTPUT_KHDR_DIR}"
1162
1163
1164 print_header "Check for built modules in install directory"
1165
1166 # Make sure some modules were actually built
1167 tree "${MODULES_OUTPUT_KSRC_DIR}"
1168 if [ "x$(find "${MODULES_OUTPUT_KSRC_DIR}" -name '*.ko*' -printf yes -quit)" != "xyes" ]; then
1169   echo "No modules built!"
1170   exit 1
1171 fi
1172
1173 tree "${MODULES_OUTPUT_KHDR_DIR}"
1174 if [ "x$(find "${MODULES_OUTPUT_KHDR_DIR}" -name '*.ko*' -printf yes -quit)" != "xyes" ]; then
1175   echo "No modules built!"
1176   exit 1
1177 fi
1178
1179 # EOF