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