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 "$LINUX_GIT_DIR"
  99     case "${distroversion:-}" in
 100         el*)
 101             git clone -b "${ktag}" "${kgitrepo}" src/linux-rpm
 102
 103             # Get the source files
 104             pushd src/linux-rpm
 105             "${WORKSPACE}/src/getsrc/getsrc/getsrc.sh"
 106             tar -x -C "${LINUX_GIT_DIR}" --strip-components=1 -f SOURCES/linux-*.tar.xz
 107             popd
 108
 109             # Pretend we're a repo like the default expects
 110             pushd "${LINUX_GIT_DIR}"
 111             git init .
 112             git config user.name 'Jenkins'
 113             git config user.email 'jenkins@efficios.com'
 114             git add .
 115             git commit -a -m 'Initial commit'
 116             git tag "${ktag}"
 117             echo "${LINUX_GIT_REF_REPO_DIR}" > .git/objects/info/alternates
 118             popd
 119             ;;
 120
 121         *)
 122             git clone --depth=1 -b "${ktag}" --reference-if-able "$LINUX_GIT_REF_REPO_DIR" "${kgitrepo}" "$LINUX_GIT_DIR"
 123             ;;
 124     esac
 125 }
 126
 127
 128 # Export the kernel sources from the git repo
 129 git_export_linux_sources() {
 130     cd "$LINUX_GIT_DIR"
 131     git archive "${ktag}" | tar -x -C "$LINUX_SRCOBJ_DIR"
 132 }
 133
 134
 135 # Upload the tar archive to the object store
 136 upload_archive_obj() {
 137     s3cmd -c "$WORKSPACE/.s3cfg" put "$WORKSPACE/$obj_name" "$obj_url_prefix/"
 138     rm -f "$WORKSPACE/$obj_name"
 139 }
 140
 141
 142 extract_archive_obj() {
 143     tar -xf "$WORKSPACE/$obj_name" -C "$LINUX_OBJ_DIR" -I pbzip2
 144     rm -f "$WORKSPACE/$obj_name"
 145 }
 146
 147
 148 tar_archive_obj() {
 149     cd "$LINUX_OBJ_DIR"
 150     tar -cf "$WORKSPACE/$obj_name" -I pbzip2 .
 151     cd -
 152 }
 153
 154 # List all GCC versions present in the PATH
 155 list_gccs() {
 156     local gccs
 157     gccs=()
 158     IFS=: read -r -a path_array <<< "$PATH"
 159     while read -r gcc ; do
 160         gccs+=("$gcc")
 161     done < <(find "${path_array[@]}" -maxdepth 1 -regex '.*/gcc-[0-9\.]+$' -printf '%f\n' | sort -t- -k2 -V -r)
 162     echo "${gccs[@]}"
 163 }
 164
 165 # Find the most recent GCC version supported by the kernel sources
 166 select_compiler() {
 167
 168     # Enter linux source dir
 169     cd "$LINUX_SRCOBJ_DIR"
 170
 171     # Get the kernel version using the host toolchain, some cross-compiled arch may be broken
 172     kversion=$(unset ARCH; unset CROSS_COMPILE; make -s kernelversion)
 173
 174     if [ "${cross_arch}" = "riscv64" ] && verlt "${kversion}" "5.12"; then
 175         echo "RISC-V support was upstreamed in kernel v4.19 but kprobes support was only added in v5.12. Don't try to build it."
 176         exit 0
 177     fi
 178
 179     if [ "${cross_arch}" = "arm64" ] && verlt "${kversion}" "3.7"; then
 180         echo "ARM64 support was added as of v3.7. Don't try to build it."
 181         exit 0
 182     fi
 183
 184     if [ "${cross_arch}" = "arm64" ] && verlt "${kversion}" "3.18"; then
 185         echo "lttng-modules requires gcc >= 5.1 for ARM64 due to compiler bugs in gcc."
 186         echo "gcc-5 support was added to the kernel as of v3.18. Don't this to build it."
 187         exit 0
 188     fi
 189
 190     if { verlt "$kversion" "4.4"; }; then
 191         # Force gcc-4.8 for kernels before 4.4
 192         selected_cc='gcc-4.8'
 193         # Due to compiler bugs in gcc on arm64, lttng-modules disallows
 194         # compilation with gcc < 5.1.
 195         if [[ "${cross_arch}" == "arm64" ]] ; then
 196             selected_cc='gcc-5.5'
 197             export PATH="${PATH:-}:/usr/local/gcc5.5/bin"
 198             export LD_LIBRARY_PATH="${LD_LIBRARY_PATH:-}:/usr/local/gcc5.5/lib"
 199         fi
 200         selected_cc_version=$(echo "${selected_cc}" | cut -d'-' -f2)
 201     else
 202         for cc in $(list_gccs) ; do
 203             if "${CROSS_COMPILE:-}${cc}" -I include/ -D__LINUX_COMPILER_H -D__LINUX_COMPILER_TYPES_H -E include/linux/compiler-gcc.h; then
 204                 cc_version=$(echo "${cc}" | cut -d'-' -f2)
 205                 if { verlt "${kversion}" "5.17"; } && { vergt "${cc_version}" "11"; } ; then
 206                     # Using gcc-12+ with '-Wuse-after-free' breaks the build of older
 207                     # kernels (in particular, objtool). Some releases on LTS
 208                     # branches between 4.x and 5.15 can be built with gcc-12.
 209                     # @see https://lore.kernel.org/lkml/20494.1643237814@turing-police/
 210                     # @see https://gitlab.com/linux-kernel/stable/-/commit/52a9dab6d892763b2a8334a568bd4e2c1a6fde66
 211                     continue
 212                 fi
 213                 selected_cc="$cc"
 214                 selected_cc_version="$cc_version"
 215                 break
 216             fi
 217         done
 218     fi
 219
 220     if [ -z "$selected_cc" ]; then
 221       echo "Found no suitable compiler."
 222       exit 1
 223     fi
 224
 225     # lttng-modules requires gcc >= 5.1 for aarch64
 226     # @see https://github.com/lttng/lttng-modules/commit/be06402dbdbea2f3394e60ec15c5d3356e2be416
 227     if { verlt "${selected_cc_version}" "5.1"; } && [ "${cross_arch}" = "arm64" ] ; then
 228         echo "Building lttng-modules on aarch64 requires gcc >= 5.1"
 229         exit 1
 230     fi
 231
 232     cd -
 233 }
 234
 235 export_kbuild_flags() {
 236     local _KAFLAGS
 237     local _KCFLAGS
 238     local _KCPPFLAGS
 239     local _HOSTCFLAGS
 240
 241     _KAFLAGS=()
 242     _KCFLAGS=()
 243     _KCPPFLAGS=()
 244     _HOSTCFLAGS=()
 245
 246     if { vergte "$selected_cc_version" "6"; }; then
 247         # Older kernel Makefiles do not expect the compiler to default to PIE
 248         _KAFLAGS+=(-fno-pie)
 249         _KCFLAGS+=(
 250             -fno-pie
 251             -no-pie
 252             -fno-stack-protector
 253         )
 254         _KCPPFLAGS+=(-fno-pie)
 255     fi
 256
 257     if { vergte "${selected_cc_version}" "10"; } && { verlt "${kversion}" "5.10"; } ; then
 258         # gcc-10 changed the default from '-fcommon' to '-fno-common', which
 259         # causes a linker failure. '-fcommon' can be set on the HOSTCFLAGS
 260         # to avoid the issue.
 261         # @see https://gitlab.com/linux-kernel/stable/-/commit/e33a814e772cdc36436c8c188d8c42d019fda639
 262         _HOSTCFLAGS+=(-fcommon)
 263     fi
 264
 265     if { verlt "${kversion}" "5.14"; } && [ "${cross_arch:-}" == "armhf" ] ; then
 266         # Work-around for producing instructions that aren't valid for the
 267         # default architectures.
 268         # Eg. Error: selected processor does not support `cpsid i' in ARM mode
 269         _KCFLAGS+=(-march=armv7-a -mfpu=vfpv3-d16)
 270         _KCPPFLAGS+=(-march=armv7-a -mfpu=vfpv3-d16)
 271     fi
 272
 273     if { vergt "${selected_cc_version}" "8"; } && { vergte "${kversion}" "4.15"; } && { verlt "${kversion}" "4.17"; } ; then
 274         # This was added to -Wall in gcc 9 but some kernels do not include the fixes
 275         # @see https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88583
 276         _KCFLAGS+=(-Wno-error=packed-not-aligned)
 277     fi
 278
 279     export KAFLAGS="${_KAFLAGS[*]}"
 280     export KCFLAGS="${_KCFLAGS[*]}"
 281     export KCPPFLAGS="${_KCPPFLAGS[*]}"
 282     export HOSTCFLAGS="${_HOSTCFLAGS[*]}"
 283     export CC="${CROSS_COMPILE:-}${selected_cc}"
 284     export HOSTCC="${selected_cc}"
 285
 286     make_args=(
 287         CC="${CC}"
 288         HOSTCC="${HOSTCC}"
 289         HOSTCFLAGS="${HOSTCFLAGS:-}"
 290     )
 291
 292     if [ -n "${DEBUG}" ] ; then
 293         make_args+=(
 294             V=1
 295         )
 296     fi
 297 }
 298
 299 patch_linux_kernel() {
 300     local commit_hash
 301     commit_hash="$1"
 302
 303     # Show the title of the patch in the build log
 304     git -C "${LINUX_GIT_REF_REPO_DIR}" show --oneline -s "${commit_hash}"
 305
 306     # Apply patch, don't fail if it doesn't apply cleanly
 307     set +e
 308     git -C "${LINUX_GIT_REF_REPO_DIR}" format-patch -n1 --stdout "${commit_hash}" | patch -p1
 309     set -e
 310
 311     if [ "$?" -gt 1 ] ; then
 312         echo "Serious issue patching"
 313         exit 1
 314     fi
 315 }
 316
 317 build_linux_kernel() {
 318     cd "$LINUX_SRCOBJ_DIR"
 319
 320     kversion=$(make -s kernelversion "${make_args[@]}")
 321     pahole_version="$(pahole --version | tr -d 'v')"
 322
 323     if { verlt "${kversion}" "3.3"; } && [ "${vanilla_config}" = "imx_v6_v7_defconfig" ] ; then
 324         # imx_v6_v7 didn't exist before 06965c39b4c63933fa0a1cde2237ef85477c5655
 325         if { verlt "${kversion}" "3.2"; } ; then
 326             vanilla_config='mx5_defconfig'
 327         else
 328             vanilla_config='mx51_defconfig'
 329         fi
 330     fi
 331
 332     if { verlt "${kversion}" "3.13"; } && [ "${vanilla_config}" = "pseries_le_defconfig" ] ; then
 333         # pseries_le_deconfig was introduced in f53e462e907cbaed29c49c0f10f5b8f614e1bf1d
 334         vanilla_config='pseries_defconfig'
 335     fi
 336
 337     # Generate kernel configuration
 338     case "$ktag" in
 339       *el*)
 340         # Copy the EL kernel configuration
 341         el_arch="${cross_arch:-$arch}"
 342         case "${el_arch}" in
 343           amd64)
 344             el_arch=x86_64
 345             ;;
 346           arm64)
 347             el_arch=aarch64
 348             ;;
 349           ppc64el)
 350             el_arch=ppc64le
 351             ;;
 352           *)
 353             ;;
 354         esac
 355         ls "${WORKSPACE}/src/linux-rpm/SOURCES/"
 356         if [ -f "${WORKSPACE}/src/linux-rpm/SOURCES/kernel-${el_arch}.config" ] ; then
 357           cp "${WORKSPACE}/src/linux-rpm/SOURCES/kernel-${el_arch}.config" .config
 358         elif [ -f "${WORKSPACE}/src/linux-rpm/SOURCES/kernel-${el_arch}-rhel.config" ] ; then
 359           cp "${WORKSPACE}/src/linux-rpm/SOURCES/kernel-${el_arch}-rhel.config" .config
 360         fi
 361
 362         # Eg.
 363         # mm/mempolicy.c: In function ‘mpol_parse_str’:
 364         # mm/mempolicy.c:2980:26: error: writing 1 byte into a region of size 0 [-Werror=stringop-overflow=]
 365         export KCFLAGS="${KCFLAGS} -Wno-error -Wno-all -Wno-error=stringop-overflow -Wno-error=address-of-packed-member"
 366         ;;
 367
 368       Ubuntu*)
 369         if [ "${cross_arch}" = "powerpc" ] && vergte "${kversion}" "4.10"; then
 370           echo "Ubuntu removed big endian powerpc configuration from kernel >= 4.10. Don't try to build it."
 371           exit 0
 372         fi
 373
 374         if [ "${cross_arch}" = "riscv64" ] && verlt "${kversion}" "6.2"; then
 375           echo "Ubuntu added RISC-V config to their 'regular' kernels in v6.2. Don't try to build it."
 376           exit 0
 377         fi
 378
 379         FAKEROOT_ARGS=(
 380             'KW_DEFCONFIG_DIR=.'
 381         )
 382         fakeroot debian/rules clean "${FAKEROOT_ARGS[@]}"
 383
 384         # Hack for kernel Ubuntu-hwe-5.8
 385         # The debian/control file is produced by the clean target above, so this
 386         # check needs to happen afterwards.
 387         if [ ! -f "debian/compat" ] && ! grep -q debhelper-compat debian/control; then
 388             echo "10" > "debian/compat"
 389         fi
 390
 391         # genconfigs check can fail in certain cases, eg. when a more recent
 392         # compiler exposes kernel configuration flags which aren't set in the
 393         # Ubuntu annotations.
 394         # In any case, the configuration will be updated with any missing values
 395         # later in our build script.
 396         FAKEROOT_ARGS+=('do_skip_checks=true')
 397
 398         # Some Ubuntu tags default the toolchain using `gcc?=gcc-XX` in
 399         # `debian/rules.d/0-common-vars.mk`. This may fail if the gcc version
 400         # used as a default isn't available.
 401         # For example, Ubuntu-6.8.0-7.7 sets `gcc?=gcc-13`, and that version
 402         # of gcc isn't available on the deb12-amd64 ci-nodes.
 403         # Work has also already been done in `select_compiler` to make our
 404         # own decision of which compiler to use. As a result of both cases,
 405         # our compiler choice should be passed into genconfigs.
 406         FAKEROOT_ARGS+=("gcc=${selected_cc}")
 407
 408         fakeroot debian/rules genconfigs "${FAKEROOT_ARGS[@]}"
 409         cp CONFIGS/"${ubuntu_config}" .config
 410         ;;
 411
 412       *)
 413         # Force 32bit build on i386, default is 64bit
 414         if [ "$arch" = "i386" ]; then
 415             export ARCH="i386"
 416         fi
 417
 418         make "${vanilla_config}" "${make_args[@]}"
 419         ;;
 420     esac
 421
 422     if [ "${vanilla_config}" = "pseries_defconfig" ] && [ "${cross_arch}" = "ppc64el" ] ; then
 423         # @see diff <(git show v3.13:arch/powerpc/configs/pseries_defconfig) <(git show v3.13:arch/powerpc/configs/pseries_le_defconfig)
 424         scripts/config --enable CONFIG_CPU_LITTLE_ENDIAN
 425         scripts/config --enable CONFIG_CMA
 426         scripts/config --disable CONFIG_XMON_DEFAULT
 427         # scripts/config --disable CONFIG_VIRTUALIZATION
 428         # scripts/config --disable CONFIG_KVM_BOOK3S_64
 429         scripts/config --disable CONFIG_KVM_BOOK3S_64_HV
 430     fi
 431
 432     if [ -f "init/Kconfig.suse" ] ; then
 433         # Get values from git tag, eg. 'rpm-5.14.21-150400.24.108'
 434         # Note: the "150400" type of SUSE major version is only present on tags
 435         # from 2022 and newer (about half-way through SLE15SP3).
 436         # This will not work as expected on earlier tags.
 437         SLES_RELEASE="$(echo "${ktag}" | cut -d '-' -f 3 | cut -d'.' -f 1)"
 438         scripts/config --set-val CONFIG_SUSE_VERSION $((10#"$(echo "${SLES_RELEASE}" | head -c 2)"))
 439         scripts/config --set-val CONFIG_SUSE_PATCHLEVEL $((10#"$(echo "${SLES_RELEASE}" | head -c 4 | tail -c 2)"))
 440
 441         # Disable the renesas clk driver that has build issues,
 442         # eg. drivers/clk/renesas/renesas-rzg2l-cpg.c:185:17: error: ‘clk’ undeclared (first use in this function)
 443         scripts/config --disable CONFIG_CLK_RENESAS
 444
 445         # From drives/spi/spi-atmel.c
 446         # ./include/linux/gpio/consumer.h:141:49: note: expected ‘struct gpio_desc *’ but argument is of type 'int'
 447         scripts/config --disable CONFIG_SPI_ATMEL
 448         scripts/config --disable CONFIG_SPI_AT91_USART
 449         scripts/config --disable CONFIG_SPI_ATMEL_QUADSPI
 450
 451         # drivers/net/wireless/mediatek/mt76/mt7915/testmode.c: In function ‘mt7915_tm_set_wmm_qid’:
 452         # drivers/net/wireless/mediatek/mt76/mt7915/testmode.c:176:30: error: ‘struct mt7915_vif’ has no member named ‘mt76’
 453         scripts/config --disable CONFIG_WLAN_VENDOR_MEDIATEK
 454
 455         # drivers/net/wireless/microchip/wilc1000/cfg80211.c: In function ‘wilc_wfi_cfg_parse_ch_attr’:
 456         # drivers/net/wireless/microchip/wilc1000/cfg80211.c:970:17: error: ‘for’ loop initial declarations are only allowed in C99 or C11 mode
 457         scripts/config --disable CONFIG_WLAN_VENDOR_MICROCHIP
 458
 459         # fs/f2fs/file.c: In function ‘punch_hole’:
 460         # fs/f2fs/file.c:1093:49: error: ‘mapping’ undeclared (first use in this function)
 461         scripts/config --disable CONFIG_F2FS_FS
 462     fi
 463
 464     # oldnoconfig was renamed in 4.19
 465     if vergte "$kversion" "4.19"; then
 466         update_conf_target="olddefconfig"
 467     else
 468         update_conf_target="oldnoconfig"
 469     fi
 470
 471     # Fix 'defined(@array)' was removed from recent perl
 472     if [ -f "kernel/timeconst.pl" ]; then
 473       sed -i 's/defined(\@\(.*\))/@\1/' kernel/timeconst.pl
 474     fi
 475
 476     # Fix syntax of inline assembly which is confused with C++11 raw strings on gcc >= 5
 477     if [ "$HOSTCC" != "gcc-4.8" ]; then
 478       if [ -f "arch/x86/kvm/svm.c" ]; then
 479         sed -i 's/ R"/ R "/g; s/"R"/" R "/g' arch/x86/kvm/svm.c
 480       fi
 481
 482       if [ -f "arch/x86/kvm/vmx.c" ]; then
 483         sed -i 's/ R"/ R "/g; s/"R"/" R "/g' arch/x86/kvm/vmx.c
 484       fi
 485     fi
 486
 487     if { verlt "${kversion}" "5.11"; } && { vergte "${kversion}" "4.10"; } ; then
 488         # Binutils > 2.35 strips empty symbol tables, causing obltool to fail
 489         # in certain cases when files are empty.
 490         # @see https://gitlab.com/linux-kernel/stable/-/commit/1d489151e9f9d1647110277ff77282fe4d96d09b
 491         #
 492         # There doesn't seem to be any LD/AS/AR flags to control this behaviour,
 493         # therefore patching tools/objtool/elf.c is attempted.
 494         patch_linux_kernel 1d489151e9f9d1647110277ff77282fe4d96d09b
 495         if { verlt "${kversion}" "4.18"; } ; then
 496             patch_linux_kernel e81e0724432542af8d8c702c31e9d82f57b1ff31
 497         fi
 498     fi
 499
 500     if { vergt "${selected_cc_version}" "7"; } && { vergte "${kversion}" "4.14"; } && { verlt "${kversion}" "4.17"; } ; then
 501         # Builds fail due to -Werror=restrict in pager.o and str_error_r.o
 502         if { verlt "${kversion}" "4.16"; } ; then
 503             # This is patched since objtool's Makefile doesn't respect HOSTCFLAGS
 504             # @see https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ad343a98e74e85aa91d844310e797f96fee6983b
 505             patch_linux_kernel ad343a98e74e85aa91d844310e797f96fee6983b
 506         fi
 507         if { verlt "${kversion}" "4.17"; } ; then
 508             # This is patched since objtool's Makefile doesn't respect HOSTCFLAGS
 509             # @see https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=854e55ad289ef8888e7991f0ada85d5846f5afb9
 510             patch_linux_kernel 854e55ad289ef8888e7991f0ada85d5846f5afb9
 511         fi
 512
 513     fi
 514
 515     if { vergt "${selected_cc_version}" "9"; } && { verlt "${kversion}" "5.6"; } ; then
 516         # Duplicate decalarations of __force_order
 517         # @see https://gitlab.com/linux-kernel/stable/-/commit/df6d4f9db79c1a5d6f48b59db35ccd1e9ff9adfc
 518         # However, kaslr_64.c doesn't exit in 4.15, 4.16, it's named pagetable.c
 519         if [ -f arch/x86/boot/compressed/pagetable.c ] ; then
 520             sed -i '/^unsigned long __force_order;$/d' arch/x86/boot/compressed/pagetable.c
 521         fi
 522         if [ -f arch/x86/boot/compressed/kaslr_64.c ] ; then
 523             patch_linux_kernel df6d4f9db79c1a5d6f48b59db35ccd1e9ff9adfc
 524         fi
 525     fi
 526
 527     if { vergte "${kversion}" "4.18"; } && { verlt "${kversion}" "4.19"; } ; then
 528         # In some cases, compiling net/bpfilter can fail with the following error:
 529         #   net/bpfilter/main.c:9:10: fatal error: include/uapi/linux/bpf.h: No such file or directory
 530         #   make[2]: *** [scripts/Makefile.host:107: net/bpfilter/main.o] Error 1
 531         #
 532         # While the issue is potentially in a number of old versions, it has only
 533         # been observed in v4.18-rt
 534         #
 535         patch_linux_kernel 303a339f30a9441c4695d3d2cc78f1b33cd959ff
 536     fi
 537
 538     if { vergte "${kversion}" "4.18"; } && { verlt "${kversion}" "4.19"; } ; then
 539         # In some cases, compiling net/bpfilter can fail with the following error:
 540         #   net/bpfilter/main.c:9:10: fatal error: include/uapi/linux/bpf.h: No such file or directory
 541         #   make[2]: *** [scripts/Makefile.host:107: net/bpfilter/main.o] Error 1
 542         #
 543         # While the issue is potentially in a number of old versions, it has only
 544         # been observed in v4.18-rt
 545         #
 546         patch_linux_kernel 303a339f30a9441c4695d3d2cc78f1b33cd959ff
 547     fi
 548
 549     if { vergte "${kversion}" "4.15"; } && { verlt "${kversion}" "4.18"; } ; then
 550         # Some old kernels fail to build when make is too new
 551         # @see https://gitlab.com/linux-kernel/stable/-/commit/9feeb638cde083c737e295c0547f1b4f28e99583
 552         patch_linux_kernel 9564a8cf422d7b58f6e857e3546d346fa970191e
 553     fi
 554
 555     if { vergte "${kversion}" "4.14"; } && { verlt "${kversion}" "4.14.55"; } ; then
 556         # Some old kernels fail to build when make is too new
 557         # @see https://gitlab.com/linux-kernel/stable/-/commit/9feeb638cde083c737e295c0547f1b4f28e99583
 558         patch_linux_kernel e82885490a611f2b75a6c27cd7bb09665c1740be
 559     fi
 560
 561     if ( { vergte "${kversion}" "4.15"; } && { verlt "${kversion}" "4.18"; } ) || \
 562        ( { vergte "${kversion}" "4.14"; } && { verlt "${kversion}" "4.14.56"; } ) ; then
 563         # Some old kernels fail to build when make is too new
 564         # @see https://gitlab.com/linux-kernel/stable/-/commit/9feeb638cde083c737e295c0547f1b4f28e99583
 565         patch_linux_kernel 9feeb638cde083c737e295c0547f1b4f28e99583
 566     fi
 567
 568     if ( { vergte "${kversion}" "4.12"; } && { verlt "${kversion}" "4.20.17"; } ) || \
 569        ( { vergte "${kversion}" "5.0"; } && { verlt "${kversion}" "5.0.12"; } ) ; then
 570         # Old kernels can fail to build while on newer host kernels with errors
 571         # such as:
 572         #   In file included from scripts/selinux/genheaders/genheaders.c:19:
 573         #   ./security/selinux/include/classmap.h:249:2: error: #error New address family defined, please update secclass_map.
 574         # @see https://gitlab.com/linux-kernel/stable/-/commit/dfbd199a7cfe3e3cd8531e1353cdbd7175bfbc5e
 575         #
 576         patch_linux_kernel dfbd199a7cfe3e3cd8531e1353cdbd7175bfbc5e
 577     fi
 578
 579     # Compatibility with binutils >= ~ 2.31
 580     if { vergte "${kversion}" "3.19"; } && { verlt "${kversion}" "4.16"; } ; then
 581         patch_linux_kernel b21ebf2fb4cde1618915a97cc773e287ff49173e
 582     fi
 583     if { vergte "${kversion}" "3.17"; } && { verlt "${kversion}" "3.18.69"; } ; then
 584         patch_linux_kernel edb9d2d5e647e7a8521b0d35f8452deb02dfd138
 585     fi
 586     if { vergte "${kversion}" "3.17"; } && { verlt "${kversion}" "3.18.100"; } ; then
 587         patch_linux_kernel 3be6583f0b6f1bf1ee650ebf473d9dee36836527
 588         patch_linux_kernel 12d839211d080f6a9c370398c41a260365d34c62
 589     fi
 590     if { vergte "${kversion}" "3.16"; } && { verlt "${kversion}" "3.16.82"; } ; then
 591         patch_linux_kernel ad10e6d464796f2a481de4039a43b9cfca034e1c
 592     fi
 593
 594     if ( { vergte "${kversion}" "3.14"; } && { verlt "${kversion}" "4.4"; } ) ||
 595        ( { vergte "${kversion}" "4.8"; } && { verlt "${kversion}" "4.18"; } ); then
 596         # While the original motivation of this patch is for fixing builds using
 597         # clang, the same error occurs between linux >= 3.14 and < 4.4, and in
 598         # 4.15, 4.16.
 599         # For rt-linux, the error has been observed in 4.8, 4.11, and 4.13.
 600         #
 601         # This patch only partially applies due to changes in kernel/Makefile,
 602         # so a supplementary patch is needed
 603         #
 604         # Without this patch, builds fail with
 605         #   Cannot find symbol for section 2: .text.
 606         #   kernel/elfcore.o: failed
 607         #
 608         # @see https://github.com/linuxppc/issues/issues/388
 609         # @see https://lore.kernel.org/lkml/20201204165742.3815221-2-arnd@kernel.org/
 610         #
 611         patch_linux_kernel 6e7b64b9dd6d96537d816ea07ec26b7dedd397b9
 612         if grep -q elfcore.o kernel/Makefile ; then
 613             sed -i '/^.* += elfcore.o$/d' kernel/Makefile
 614         fi
 615     fi
 616     # Same as above for the v4.4 branch
 617     if ( { vergte "${kversion}" "4.4"; } && { verlt "${kversion}" "4.4.257"; } ); then
 618         patch_linux_kernel 3140b0740b31cc63cf2ee08bc3f746b423eb068d
 619         if grep -q elfcore.o kernel/Makefile ; then
 620             sed -i '/^.* += elfcore.o$/d' kernel/Makefile
 621         fi
 622     fi
 623
 624     if { vergte "${kversion}" "4.5"; } && { verlt "${kversion}" "4.8"; } ; then
 625         # Kernels between v4.5 and v4.8 built with gcc >= 8 on arm will hit an
 626         # assembler error :
 627         #
 628         #  kernel/.tmp_fork.s: Assembler messages:
 629         #  kernel/.tmp_fork.s:1790: Error: .err encountered
 630         #
 631         # @see https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85745
 632         #
 633         patch_linux_kernel 9f73bd8bb445e0cbe4bcef6d4cfc788f1e184007
 634     fi
 635
 636     if ( { vergte "${kversion}" "4.4"; } && { verlt "${kversion}" "4.4.136"; } ) ||
 637        ( { vergte "${kversion}" "4.5"; } && { verlt "${kversion}" "4.8"; } ); then
 638         # Hacky patch to deal with the following build error:
 639         #   Cannot find symbol for section 7: .text.unlikely.
 640         #   kernel/kexec_file.o: failed
 641         #   make[1]: *** [scripts/Makefile.build:291: kernel/kexec_file.o] Error 1
 642         #
 643         # This error happens with binutils 2.36 and 2.37, but should probably not
 644         # be an issue with binutils 2.38.
 645         # @see https://github.com/linuxppc/issues/issues/388
 646         # @see https://github.com/bminor/binutils-gdb/commit/c09c8b42021180eee9495bd50d8b35e683d3901b
 647         #
 648         # There is some sort of config (unspecified in past discussions) which
 649         # provokes the error, and there was never a potential fix merged in
 650         # this discussion, in part because the build systems of the kernel
 651         # switched to objtool instead.
 652         #
 653         # @see https://lore.kernel.org/all/20210215162209.5e2a475b@gandalf.local.home/
 654         #
 655         sed -i 's/return txtname;/return shdr0->sh_size ? txtname : NULL;/' scripts/recordmcount.h
 656
 657         # After applying the above patch, the build continues but fails with
 658         # head64.c:(.text.exit+0x5): undefined reference to `__gcov_exit'
 659         #
 660         scripts/config --disable CONFIG_GCOV_KERNEL
 661     fi
 662
 663     if { vergte "${kversion}" "4.5"; } && { verlt "${kversion}" "4.5.5"; } ; then
 664         # drivers/staging/wilc1000/wilc_spi.c:123:34: error: storage size of ‘wilc1000_spi_ops’ isn’t known
 665         patch_linux_kernel ce7b516f3f9e11fe4ee06fad0d7e853bb6e8f160
 666     fi
 667
 668     # Newer binutils don't accept 3 operand 'cmp' instructions on ppc64
 669     # Convert them to 'cmpw' which was previously done silently
 670     if verlt "$kversion" "4.9"; then
 671         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/"
 672         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/"
 673         sed -i "s/\$pie \-o \"\$ofile\"/\$pie --no-dynamic-linker -o \"\$ofile\"/" arch/powerpc/boot/wrapper
 674     fi
 675
 676     if [ "$(scripts/config --state CONFIG_EXTCON_ADC_JACK)" != "n" ] &&
 677            ( { vergte "${kversion}" "4.2"; } && { verlt "${kversion}" "4.12"; } ); then
 678         # 73b6ecdb93e8e77752cae9077c424fcdc6f23c39 introduced a change where
 679         # extcon-adc-jack.h has an incompatible pointer type.
 680         # In GCC >= 5 this will provoke a warning and build failure.
 681         # Eg.
 682         #   drivers/extcon/extcon-adc-jack.c: In function ‘adc_jack_probe’:
 683         #   drivers/extcon/extcon-adc-jack.c:111:64: error: passing argument 2 of ‘devm_extcon_dev_allocate’ from incompatible pointer type [-Werror=incompatible-pointer-types]
 684         #   make[2]: *** [scripts/Makefile.build:295: drivers/extcon/extcon-adc-jack.o] Error 1
 685         #
 686         # 8a522bf2d4f788306443d36b26b54f0aedcdfdbe (in 4.11) has a fix for this warning
 687         #
 688         patch_linux_kernel 8a522bf2d4f788306443d36b26b54f0aedcdfdbe
 689     fi
 690
 691     if ( { vergte "${kversion}" "4.15"; } && { verlt "${kversion}" "4.15.2"; } ) || \
 692        ( { vergte "${kversion}" "4.14"; } && { verlt "${kversion}" "4.14.18"; } ) ; then
 693         # Fix an objtool Segmentation fault
 694         patch_linux_kernel dd12561854824fd1f05baf2a1b794faa046e2425
 695     fi
 696
 697     if { vergte "${kversion}" "4.14"; } && { verlt "${kversion}" "4.14.268"; } ; then
 698         # Builds fail due to -Werror=use-after-free in sigchain.o and help.o
 699         patch_linux_kernel e89bb266b710ce056f141f29f091fd468a4a8185
 700     fi
 701
 702     # Fix a typo in v2.6.36.x
 703     if [ -f "arch/x86/kernel/entry_64.S" ]; then
 704       sed -i 's/END(do_hypervisor_callback)/END(xen_do_hypervisor_callback)/' arch/x86/kernel/entry_64.S
 705     fi
 706
 707     # Fix compiler switch in vdso Makefile for 2.6.36 to 2.6.36.2
 708     if { vergte "$kversion" "2.6.36" && verlte "$kversion" "2.6.36.3"; }; then
 709       sed -i 's/-m elf_x86_64/-m64/' arch/x86/vdso/Makefile
 710       sed -i 's/-m elf_i386/-m32/' arch/x86/vdso/Makefile
 711     fi
 712
 713     # Fix kernel < 3.0 with gcc >= 4.7
 714     if verlt "$kversion" "3.0"; then
 715       sed -i '/linux\/compiler.h/a #include <linux\/linkage.h> \/* For asmregparm *\/' arch/x86/include/asm/ptrace.h
 716       sed -i 's/extern long syscall_trace_enter/extern asmregparm long syscall_trace_enter/' arch/x86/include/asm/ptrace.h
 717       sed -i 's/extern void syscall_trace_leave/extern asmregparm void syscall_trace_leave/' arch/x86/include/asm/ptrace.h
 718       echo "header-y += linkage.h" >> include/linux/Kbuild
 719     fi
 720
 721     if [ "${cross_arch}" = "powerpc" ] ; then
 722         if { vergte "${kversion}" "4.15"; } && { verlt "${kversion}" "4.16"; } ; then
 723             # Avoid register errors such as
 724             # aes_generic.c:(.text+0x4e0): undefined reference to `_restgpr_31_x'
 725             # @see https://gitlab.com/linux-kernel/stable/-/commit/148b974deea927f5dbb6c468af2707b488bfa2de
 726             make_args+=(
 727                 CFLAGS_aes_generic.o=''
 728             )
 729         fi
 730     fi
 731
 732     if [ "$(scripts/config --state CONFIG_DEBUG_INFO_BTF)" == "y" ] &&
 733            { vergte "${pahole_version}" "1.24"; } &&
 734            (
 735                ( { vergte "${kversion}" "5.10"; } && { verlt "${kversion}" "6.0"; } ) || [[ "${ktag}" =~ .el8 ]]
 736            ) ; then
 737         # Some kernels Eg. Ubuntu-hwe-5.13-5.13.0-52.59_20.04.1
 738         # fail with the following error:
 739         #   BTFIDS  vmlinux
 740         #   FAILED: load BTF from vmlinux: Invalid argument
 741         #
 742         # When CONFIG_DEBUG_INFO_BTF is set, certain versions of pahole require
 743         # `--skip_encoding_btf_enum64` to be passed as the kernel doesn't define
 744         # BTF_KIND_ENUM64.
 745         #
 746         # Introduced in 341dfcf8d78eaa3a2dc96dea06f0392eb2978364 (~v5.10)
 747         # @see https://lore.kernel.org/bpf/20220825171620.cioobudss6ovyrkc@altlinux.org/t/
 748         #
 749         if [ -f "scripts/pahole-flags.sh" ] ; then
 750             # shellcheck disable=SC2016
 751             sed -i 's/ -J ${PAHOLE_FLAGS} / -J ${PAHOLE_FLAGS} --skip_encoding_btf_enum64 /' scripts/link-vmlinux.sh
 752         else
 753             # shellcheck disable=SC2016
 754             sed -i 's/ -J ${extra_paholeopt} / -J ${extra_paholeopt} --skip_encoding_btf_enum64 /' scripts/link-vmlinux.sh
 755             # Some older versions of RHEL don't have '${extra_paholeopt}'
 756             sed -i 's/${PAHOLE} -J ${1}/${PAHOLE} -J --skip_encoding_btf_enum64 ${1}/' scripts/link-vmlinux.sh
 757         fi
 758     fi
 759
 760     # GCC 4.8
 761     if [ "$HOSTCC" == "gcc-4.8" ]; then
 762         scripts/config --disable CONFIG_CC_STACKPROTECTOR_STRONG
 763         scripts/config --disable CONFIG_PPC_OF_BOOT_TRAMPOLINE
 764     fi
 765
 766     # Don't try to sign modules
 767     scripts/config --disable CONFIG_MODULE_SIG
 768
 769     # Disable kernel stack frame correctness validation, introduced in 4.6.0 and currently fails
 770     scripts/config --disable CONFIG_STACK_VALIDATION
 771
 772     # Cause problems with inline assembly on i386
 773     scripts/config --disable CONFIG_DEBUG_SECTION_MISMATCH
 774
 775     # Don't build samples, they are broken on some kernel releases
 776     scripts/config --disable CONFIG_SAMPLES
 777     scripts/config --disable CONFIG_BUILD_DOCSRC
 778
 779     # Disable kcov
 780     scripts/config --disable CONFIG_KCOV
 781
 782     # Broken on some RT kernels
 783     scripts/config --disable CONFIG_HYPERV
 784
 785     # Broken drivers
 786     scripts/config --disable CONFIG_RAPIDIO_TSI721
 787     scripts/config --disable CONFIG_SGI_XP
 788     scripts/config --disable CONFIG_MFD_WM8994
 789     scripts/config --disable CONFIG_DRM_RADEON
 790     scripts/config --disable CONFIG_SND_SOC_WM5100
 791     # More recent compiler optimizations (from gcc 8 onwards )expose build errors
 792     # with netronome on older kernels.
 793     # Observed in 4.11-rt, 4.15-4.17, 5.0-rt - 5.16-rt
 794     # It seems easier to disable the driver than to attempt patching.
 795     # Eg.
 796     #   In function ‘ur_load_imm_any’,
 797     #   inlined from ‘jeq_imm’ at drivers/net/ethernet/netronome/nfp/bpf/jit.c:3146:13:
 798     #   ./include/linux/compiler.h:350:45: error: call to ‘__compiletime_assert_1062’ declared with attribute error: FIELD_FIT: value too large for the field
 799     #   350 |         _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
 800     #
 801     scripts/config --disable CONFIG_NET_VENDOR_NETRONOME
 802     # Eg.
 803     #  In function ‘memcpy’,
 804     #  inlined from ‘kszphy_get_strings’ at drivers/net/phy/micrel.c:664:3:
 805     #  ./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
 806     #  305 |                         __read_overflow2();
 807     #      |                         ^~~~~~~~~~~~~~~~~~
 808     #  make[3]: *** [scripts/Makefile.build:308: drivers/net/phy/micrel.o] Error 1
 809     #
 810     scripts/config --disable CONFIG_MICREL_PHY
 811
 812
 813     # IGBVF won't build with recent gcc on 2.6.38.2
 814     if { vergte "$kversion" "2.6.37" && verlt "$kversion" "2.6.38"; }; then
 815       scripts/config --disable CONFIG_IGBVF
 816     fi
 817
 818     # Don't fail the build on warnings
 819     scripts/config --disable CONFIG_WERROR
 820     scripts/config --enable CONFIG_PPC_DISABLE_WERROR
 821
 822     # Set required options
 823     scripts/config --enable CONFIG_TRACEPOINTS
 824     scripts/config --enable CONFIG_KALLSYMS
 825     scripts/config --enable CONFIG_HIGH_RES_TIMERS
 826     scripts/config --enable CONFIG_KPROBES
 827     scripts/config --enable CONFIG_FTRACE
 828     scripts/config --enable CONFIG_BLK_DEV_IO_TRACE
 829     scripts/config --enable CONFIG_KALLSYMS_ALL
 830     scripts/config --enable CONFIG_HAVE_SYSCALL_TRACEPOINTS
 831     scripts/config --enable CONFIG_PERF_EVENTS
 832     scripts/config --enable CONFIG_EVENT_TRACING
 833     scripts/config --enable CONFIG_KRETPROBES
 834
 835     # Starting in linux 6.9-rc1, TRIM_UNUSED_SYMS seems to be true
 836     # for out build configurations. In earlier versions the default
 837     # was set depending on the value of `COMPILE_TEST`.
 838     # See upstream commit d2d5cba5d92c4ed23caa86228a1bc31b07e90fe9.
 839     scripts/config --disable CONFIG_TRIM_UNUSED_KSYMS
 840
 841     if [ -n "${DEBUG}" ] ; then
 842         cat .config
 843     fi
 844
 845     make "$update_conf_target" "${make_args[@]}"
 846     make -j"$NPROC" "${make_args[@]}"
 847
 848     krelease=$(make -s kernelrelease "${make_args[@]}")
 849
 850     # Save the kernel and modules
 851     mkdir -p "$LINUX_INSTOBJ_DIR/boot"
 852     make INSTALL_MOD_PATH="$LINUX_INSTOBJ_DIR" INSTALL_MOD_STRIP=1 modules_install "${make_args[@]}"
 853     make INSTALL_MOD_PATH="$LINUX_INSTOBJ_DIR" INSTALL_PATH="$LINUX_INSTOBJ_DIR/boot" install "${make_args[@]}"
 854     rm -f "$LINUX_INSTOBJ_DIR/lib/modules/${krelease}/source" "$LINUX_INSTOBJ_DIR/lib/modules/${krelease}/build"
 855     ln -s ../../../../sources "$LINUX_INSTOBJ_DIR/lib/modules/${krelease}/source"
 856     ln -s ../../../../sources "$LINUX_INSTOBJ_DIR/lib/modules/${krelease}/source"
 857 }
 858
 859
 860 extract_distro_headers() {
 861
 862     # Enter linux source dir
 863     cd "${LINUX_SRCOBJ_DIR}"
 864
 865
 866     # For RT kernels, copy version file
 867     if [ -s localversion-rt ]; then
 868         cp -a localversion-rt "${LINUX_HDROBJ_DIR}"
 869     fi
 870
 871     # Copy all Makefile related stuff
 872     find . -path './include/*' -prune \
 873         -o -path './scripts/*' -prune -o -type f \
 874         \( -name 'Makefile*' -o -name 'Kconfig*' -o -name 'Kbuild*' -o \
 875             -name '*.sh' -o -name '*.pl' -o -name '*.lds' \) \
 876         -print | cpio -pd --preserve-modification-time "${LINUX_HDROBJ_DIR}"
 877
 878     # Copy base scripts and include dirs
 879     cp -a scripts include "${LINUX_HDROBJ_DIR}"
 880
 881     # Copy arch includes
 882     (find arch -name include -type d -print0 | \
 883         xargs -0 -n1 -I '{}' find '{}' -type f) | \
 884         cpio -pd --preserve-modification-time "${LINUX_HDROBJ_DIR}"
 885
 886     # Copy arch scripts
 887     (find arch -name scripts -type d -print0 | \
 888         xargs -0 -n1 -I '{}' find '{}' -type f) | \
 889         cpio -pd --preserve-modification-time "${LINUX_HDROBJ_DIR}"
 890
 891     # Cleanup scripts
 892     rm -f "${LINUX_HDROBJ_DIR}/scripts/*.o"
 893     rm -f "${LINUX_HDROBJ_DIR}/scripts/*/*.o"
 894
 895     # On powerpc 32bits this object is required to link modules
 896     if [ "${karch}" = "powerpc" ]; then
 897         if [ "$(scripts/config -s CONFIG_PPC64)" = "y" ] && vergte "${kversion}" "5.4"; then
 898             :
 899         else
 900             cp -a --parents arch/powerpc/lib/crtsavres.[So] "${LINUX_HDROBJ_DIR}/"
 901         fi
 902     fi
 903
 904     # On arm64 between 4.13 and 1.15 this object is required to build with ftrace support
 905     if [ "${karch}" = "arm64" ]; then
 906         if [ -f "arch/arm64/kernel/ftrace-mod.S" ]; then
 907             cp -a --parents arch/arm64/kernel/ftrace-mod.[So] "${LINUX_HDROBJ_DIR}/"
 908         fi
 909     fi
 910
 911     # On riscv with 5.14 the vsdo objects are required
 912     if [ "${karch}" = "riscv" ] && \
 913            ( { vergte "${kversion}" "5.14"; } && { verlt "${kversion}" "5.15"; } ); then
 914             cp -a --parents arch/riscv/kernel/vdso/*.o "${LINUX_HDROBJ_DIR}/"
 915     fi
 916
 917     # Newer kernels need objtool to build modules when CONFIG_STACK_VALIDATION=y
 918     if [ -f tools/objtool/objtool ]; then
 919       cp -a --parents tools/objtool/objtool "${LINUX_HDROBJ_DIR}/"
 920     fi
 921
 922     if [ -f "arch/x86/kernel/macros.s" ]; then
 923       cp -a --parents arch/x86/kernel/macros.s "${LINUX_HDROBJ_DIR}/"
 924     fi
 925
 926     # Copy modules related stuff, if available
 927     if [ -s Module.symvers ]; then
 928         cp Module.symvers "${LINUX_HDROBJ_DIR}"
 929     fi
 930
 931     if [ -s System.map ]; then
 932         cp System.map "${LINUX_HDROBJ_DIR}"
 933     fi
 934
 935     if [ -s Module.markers ]; then
 936         cp Module.markers "${LINUX_HDROBJ_DIR}"
 937     fi
 938
 939     # Copy config file
 940     cp .config "${LINUX_HDROBJ_DIR}"
 941
 942     # Make sure the Makefile and version.h have a matching timestamp so that
 943     # external modules can be built
 944     if [ -s "${LINUX_HDROBJ_DIR}/include/generated/uapi/linux/version.h" ]; then
 945         touch -r "${LINUX_HDROBJ_DIR}/Makefile" "${LINUX_HDROBJ_DIR}/include/generated/uapi/linux/version.h"
 946     elif [ -s "${LINUX_HDROBJ_DIR}/include/linux/version.h" ]; then
 947         touch -r "${LINUX_HDROBJ_DIR}/Makefile" "${LINUX_HDROBJ_DIR}/include/linux/version.h"
 948     else
 949         echo "Missing version.h"
 950         exit 1
 951     fi
 952     touch -r "${LINUX_HDROBJ_DIR}/.config" "${LINUX_HDROBJ_DIR}/include/generated/autoconf.h"
 953
 954     # Copy .config to include/config/auto.conf so "make prepare" is unnecessary.
 955     if [ ! -f "${LINUX_HDROBJ_DIR}/include/config/auto.conf" ]; then
 956         cp "${LINUX_HDROBJ_DIR}/.config" "${LINUX_HDROBJ_DIR}/include/config/auto.conf"
 957     fi
 958
 959     # Finally clean the object files from the full source tree
 960     make clean
 961
 962     # And regen the modules support files
 963     make modules_prepare "${make_args[@]}"
 964
 965     # On powerpc 32bits this object is required to link modules
 966     if [ "${karch}" = "powerpc" ]; then
 967         if [ "$(scripts/config -s CONFIG_PPC64)" = "y" ] && vergte "${kversion}" "5.4"; then
 968             :
 969         else
 970             make arch/powerpc/lib/crtsavres.o "${make_args[@]}"
 971         fi
 972     fi
 973
 974     # On arm64 between 4.13 and 4.15 this object is required to build with ftrace support
 975     if [ "${karch}" = "arm64" ]; then
 976         if [ -f "arch/arm64/kernel/ftrace-mod.S" ]; then
 977             make arch/arm64/kernel/ftrace-mod.o "${make_args[@]}"
 978         fi
 979     fi
 980
 981     # Version specific tasks
 982     case "$ktag" in
 983       Ubuntu*)
 984         # Add Ubuntu ABI number to kernel headers, this is normally done by the packaging code
 985         ABINUM="$(echo "$ktag" | grep -P -o 'Ubuntu-(lts-)?.*-\K\d+(?=\..*)')"
 986         echo "#define UTS_UBUNTU_RELEASE_ABI $ABINUM" >> include/generated/utsrelease.h
 987         echo "#define UTS_UBUNTU_RELEASE_ABI $ABINUM" >> "${LINUX_HDROBJ_DIR}/include/generated/utsrelease.h"
 988         ;;
 989       rpm-*)
 990         # Update the definition of UTS_RELEASE to match something akin to '5.14.21-150400.24.108-default'
 991         if [ -f "init/Kconfig.suse" ] ; then
 992           SLESVERSION="$(echo "${ktag}" | cut -d'-' -f 3)-default"
 993           sed -E -i "s%^(#define UTS_RELEASE \"[\.a-z0-9]+)(\")%\1-${SLESVERSION}\2%g" include/generated/utsrelease.h
 994           sed -E -i "s%^(#define UTS_RELEASE \"[\.a-z0-9]+)(\")%\1-${SLESVERSION}\2%g" "${LINUX_HDROBJ_DIR}/include/generated/utsrelease.h"
 995         fi
 996         ;;
 997     esac
 998 }
 999
1000
1001 build_modules() {
1002
1003     local kdir="$1"
1004     local outdir="$2"
1005     local kversion
1006
1007     kversion=$(make -C "$LINUX_HDROBJ_DIR" -s kernelversion)
1008
1009     # Try to catch some compatibility problems by turning some
1010     # warnings into errors.
1011     #export KCFLAGS="$KCFLAGS -Wall -Werror"
1012
1013     # Enter lttng-modules source dir
1014     cd "${MODULES_GIT_DIR}"
1015
1016     # kernels 3.10 to 3.10.13 and 3.11 to 3.11.2 introduce a deadlock in the
1017     # timekeeping subsystem. We want those build to fail.
1018     if { vergte "$kversion" "3.10" && verlte "$kversion" "3.10.13"; } || \
1019        { vergte "$kversion" "3.11" && verlte "$kversion" "3.11.2"; }; then
1020
1021         set +e
1022
1023         # Build modules
1024         KERNELDIR="${kdir}" make -j"${NPROC}" V=1 "${make_args[@]}"
1025         ret=$?
1026
1027         set -e
1028
1029         # We expect this build to fail, if it doesn't, fail the job.
1030         if [ "$ret" -eq 0 ]; then
1031             echo "This build should have failed."
1032             exit 1
1033         fi
1034
1035         # We have to publish at least one file or the build will fail
1036         echo "This kernel is broken, there is a deadlock in the timekeeping subsystem." > "${outdir}/BROKEN.txt.ko"
1037
1038         KERNELDIR="${kdir}" make clean
1039
1040     else # Regular build
1041
1042         # Build modules against full kernel sources
1043         KERNELDIR="${kdir}" make -j"${NPROC}" V=1 "${make_args[@]}"
1044
1045         # Install modules to build dir
1046         KERNELDIR="${kdir}" make INSTALL_MOD_PATH="${outdir}" modules_install
1047
1048         # Clean build dir
1049         KERNELDIR="${kdir}" make clean
1050     fi
1051 }
1052
1053
1054 ## MAIN ##
1055
1056 # Use all CPU cores
1057 NPROC=$(nproc)
1058
1059 MODULES_GIT_DIR="${WORKSPACE}/src/lttng-modules"
1060 LINUX_GIT_DIR="${WORKSPACE}/src/linux"
1061
1062 LINUX_OBJ_DIR="${WORKSPACE}/linux"
1063 LINUX_SRCOBJ_DIR="${LINUX_OBJ_DIR}/sources"
1064 LINUX_HDROBJ_DIR="${LINUX_OBJ_DIR}/headers"
1065 LINUX_INSTOBJ_DIR="${LINUX_OBJ_DIR}/install"
1066
1067 MODULES_OUTPUT_KSRC_DIR="${WORKSPACE}/build/lttng-modules-ksrc"
1068 MODULES_OUTPUT_KHDR_DIR="${WORKSPACE}/build/lttng-modules-khdr"
1069
1070 LINUX_GIT_REF_REPO_DIR="$HOME/gitcache/linux-stable.git/"
1071
1072 OBJ_STORE_URL="s3://jenkins"
1073
1074 cd "$WORKSPACE"
1075
1076 # Create build directories
1077 mkdir -p "${LINUX_SRCOBJ_DIR}" "${LINUX_HDROBJ_DIR}" "${LINUX_INSTOBJ_DIR}" "${MODULES_OUTPUT_KSRC_DIR}" "${MODULES_OUTPUT_KHDR_DIR}"
1078
1079 print_header "Clone LTTng-modules sources"
1080 git_clone_modules_sources
1081
1082 # Setup cross compile env if available
1083 if [ "x${cross_arch}" != "x" ]; then
1084
1085     case "$cross_arch" in
1086         "armhf")
1087             karch="arm"
1088             cross_compile="arm-linux-gnueabihf-"
1089             vanilla_config="imx_v6_v7_defconfig"
1090             ubuntu_config="armhf-config.flavour.generic"
1091             ;;
1092
1093         "arm64")
1094             karch="arm64"
1095             cross_compile="aarch64-linux-gnu-"
1096             vanilla_config="defconfig"
1097             ubuntu_config="arm64-config.flavour.generic"
1098             ;;
1099
1100         "powerpc")
1101             karch="powerpc"
1102             cross_compile="powerpc-linux-gnu-"
1103             vanilla_config="ppc44x_defconfig"
1104             ubuntu_config="powerpc-config.flavour.powerpc-smp"
1105             ;;
1106
1107         "ppc64el")
1108             karch="powerpc"
1109             cross_compile="powerpc64le-linux-gnu-"
1110             vanilla_config="pseries_le_defconfig"
1111             ubuntu_config="ppc64el-config.flavour.generic"
1112             ;;
1113
1114         "riscv64")
1115             karch="riscv"
1116             cross_compile="riscv64-linux-gnu-"
1117             vanilla_config="defconfig"
1118             ubuntu_config="riscv64-config.flavour.generic"
1119             ;;
1120
1121         *)
1122             echo "Unsupported cross arch $cross_arch"
1123             exit 1
1124             ;;
1125     esac
1126
1127     # Export variables used by Kbuild for cross compilation
1128     export ARCH="${karch}"
1129     export CROSS_COMPILE="${cross_compile}"
1130
1131 # Set arch specific values if we are not cross compiling
1132 elif [ "x${arch}" != "x" ]; then
1133
1134     case "$arch" in
1135         "i386")
1136             karch="x86"
1137             vanilla_config="allmodconfig"
1138             ubuntu_config="i386-config.flavour.generic"
1139             ;;
1140
1141         "amd64")
1142             karch="x86"
1143             vanilla_config="allmodconfig"
1144             ubuntu_config="amd64-config.flavour.generic"
1145             ;;
1146
1147         "armhf")
1148             karch="arm"
1149             vanilla_config="allmodconfig"
1150             ubuntu_config="armhf-config.flavour.generic"
1151             ;;
1152
1153         "arm64")
1154             karch="arm64"
1155             vanilla_config="allmodconfig"
1156             ubuntu_config="arm64-config.flavour.generic"
1157             ;;
1158
1159         "powerpc")
1160             karch="powerpc"
1161             vanilla_config="allmodconfig"
1162             ubuntu_config="powerpc-config.flavour.powerpc-smp"
1163             ;;
1164
1165         "ppc64el")
1166             karch="powerpc"
1167             vanilla_config="allmodconfig"
1168             ubuntu_config="ppc64el-config.flavour.generic"
1169             ;;
1170
1171         "riscv64")
1172             karch="riscv"
1173             vanilla_config="allmodconfig"
1174             ubuntu_config="riscv64-config.flavour.generic"
1175             ;;
1176
1177         *)
1178             echo "Unsupported arch $arch"
1179             exit 1
1180             ;;
1181     esac
1182 else
1183     echo "No arch or cross_arch specified"
1184     exit 1
1185 fi
1186
1187
1188
1189 # First get the kernel build from the object store, or build it, if it's
1190 # not available.
1191
1192 set +x
1193 echo "# Setup endpoint
1194 host_base = obj.internal.efficios.com
1195 host_bucket = obj.internal.efficios.com
1196 bucket_location = us-east-1
1197 use_https = True
1198
1199 # Setup access keys
1200 access_key = jenkins
1201 secret_key = echo123456
1202
1203 # Enable S3 v4 signature APIs
1204 signature_v2 = False" > "$WORKSPACE/.s3cfg"
1205 set -x
1206
1207 url_hash="$(echo -n "$kgitrepo" | md5sum | awk '{ print $1 }')"
1208 obj_name="linux.tar.bz2"
1209
1210 if [ -z "${cross_arch}" ]; then
1211     obj_url_prefix="$OBJ_STORE_URL/linux-build/$url_hash/$ktag/platform-${platform}/$arch/native"
1212 else
1213     obj_url_prefix="$OBJ_STORE_URL/linux-build/$url_hash/$ktag/platform-${platform}/${cross_arch}"
1214 fi
1215
1216 obj_url="$obj_url_prefix/$obj_name"
1217
1218 set +e
1219 # In s3cmd 2.3, the return code of get when an object does not exist (64)
1220 # is different than in 2.2 (12). The return codes of 's3cmd info' are
1221 # consistent between 2.2 and 2.3.
1222 s3cmd -c "$WORKSPACE/.s3cfg" info "$obj_url"
1223 ret=$?
1224 set -e
1225
1226 case "$ret" in
1227     "0")
1228       print_header "Get sources and prebuilt kernel"
1229       s3cmd -c "$WORKSPACE/.s3cfg" get "$obj_url"
1230       extract_archive_obj
1231
1232       print_header "Select compiler and set build flags"
1233       select_compiler
1234       export_kbuild_flags
1235       ;;
1236
1237     "12")
1238       print_header "Clone kernel sources"
1239
1240       # Build all the things and upload
1241       # then finish the module build...
1242
1243       git_clone_linux_sources
1244       git_export_linux_sources
1245
1246       print_header "Select compiler and set build flags"
1247       select_compiler
1248       export_kbuild_flags
1249
1250       ## PREPARE FULL LINUX SOURCE TREE
1251       print_header "Build kernel from source"
1252       build_linux_kernel
1253
1254       ## EXTRACT DISTRO STYLE KERNEL HEADERS / DEVEL
1255       extract_distro_headers
1256
1257       print_header "Upload kernel to object storage"
1258       tar_archive_obj
1259       upload_archive_obj
1260
1261       ;;
1262
1263     *)
1264       echo "Unknown error? Abort"
1265       exit 1
1266       ;;
1267 esac
1268
1269
1270 ## BUILD modules
1271 # Either we downloaded a pre-build kernel or we built it and uploaded
1272 # the archive for future builds.
1273
1274 cd "$WORKSPACE"
1275
1276 print_header "Build modules against full kernel sources"
1277 build_modules "${LINUX_SRCOBJ_DIR}" "${MODULES_OUTPUT_KSRC_DIR}"
1278
1279 print_header "Build modules against kernel headers"
1280 build_modules "${LINUX_HDROBJ_DIR}" "${MODULES_OUTPUT_KHDR_DIR}"
1281
1282
1283 print_header "Check for built modules in install directory"
1284
1285 # Make sure some modules were actually built
1286 tree "${MODULES_OUTPUT_KSRC_DIR}"
1287 if [ "x$(find "${MODULES_OUTPUT_KSRC_DIR}" -name '*.ko*' -printf yes -quit)" != "xyes" ]; then
1288   echo "No modules built!"
1289   exit 1
1290 fi
1291
1292 tree "${MODULES_OUTPUT_KHDR_DIR}"
1293 if [ "x$(find "${MODULES_OUTPUT_KHDR_DIR}" -name '*.ko*' -printf yes -quit)" != "xyes" ]; then
1294   echo "No modules built!"
1295   exit 1
1296 fi
1297
1298 # EOF