scripts/lttng-modules/param-build.sh

   1 #!/bin/bash
   2 #
   3 # Copyright (C) 2016-2019 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 platforms=${platforms:-}
  22 # Derive arch from label if it isn't set
  23 if [ -z "${arch:-}" ] ; then
  24     # Labels may be platform specific, eg. jammy-amd64, deb12-armhf
  25     regex='[[:alnum:]]+-([[:alnum:]]+)'
  26     if [[ "${platforms}" =~ ${regex} ]] ; then
  27         arch="${BASH_REMATCH[1]}"
  28     else
  29         arch="${platforms:-}"
  30     fi
  31 fi
  32
  33 cross_arch=${cross_arch:-}
  34 ktag=${ktag:-}
  35 kgitrepo=${kgitrepo:-}
  36 mversion=${mversion:-}
  37 mgitrepo=${mgitrepo:-}
  38 make_args=()
  39
  40 DEBUG=${DEBUG:-}
  41
  42 ## FUNCTIONS ##
  43
  44 # Kernel version compare functions
  45 verlte() {
  46     [  "$1" = "$(printf '%s\n%s' "$1" "$2" | sort -V | head -n1)" ]
  47 }
  48
  49 verlt() {
  50     # shellcheck disable=SC2015
  51     [ "$1" = "$2" ] && return 1 || verlte "$1" "$2"
  52 }
  53
  54 vergte() {
  55     [  "$1" = "$(printf '%s\n%s' "$1" "$2" | sort -V | tail -n1)" ]
  56 }
  57
  58 vergt() {
  59     # shellcheck disable=SC2015
  60     [ "$1" = "$2" ] && return 1 || vergte "$1" "$2"
  61 }
  62
  63 git_clone_modules_sources() {
  64     mkdir -p "$MODULES_GIT_DIR"
  65
  66     # If the version starts with "refs/", checkout the specific git ref, otherwise treat it
  67     # as a branch name.
  68     if [ "${mversion:0:5}" = "refs/" ]; then
  69         git clone --no-tags --depth=1 "${mgitrepo}" "$MODULES_GIT_DIR"
  70         (cd "$MODULES_GIT_DIR" && git fetch origin "${mversion}" && git checkout FETCH_HEAD)
  71     else
  72         git clone --no-tags --depth=1 -b "${mversion}" "${mgitrepo}" "$MODULES_GIT_DIR"
  73     fi
  74 }
  75
  76 # Checkout a shallow kernel tree of the specified tag
  77 git_clone_linux_sources() {
  78     mkdir -p "$LINUX_GIT_DIR"
  79     git clone --depth=1 -b "${ktag}" --reference "$LINUX_GIT_REF_REPO_DIR" "${kgitrepo}" "$LINUX_GIT_DIR"
  80 }
  81
  82
  83 # Export the kernel sources from the git repo
  84 git_export_linux_sources() {
  85     cd "$LINUX_GIT_DIR"
  86     git archive "${ktag}" | tar -x -C "$LINUX_SRCOBJ_DIR"
  87 }
  88
  89
  90 # Upload the tar archive to the object store
  91 upload_archive_obj() {
  92     s3cmd -c "$WORKSPACE/.s3cfg" put "$WORKSPACE/$obj_name" "$obj_url_prefix/"
  93     rm -f "$WORKSPACE/$obj_name"
  94 }
  95
  96
  97 extract_archive_obj() {
  98     tar -xf "$WORKSPACE/$obj_name" -C "$LINUX_OBJ_DIR" -I pbzip2
  99     rm -f "$WORKSPACE/$obj_name"
 100 }
 101
 102
 103 tar_archive_obj() {
 104     cd "$LINUX_OBJ_DIR"
 105     tar -cf "$WORKSPACE/$obj_name" -I pbzip2 .
 106     cd -
 107 }
 108
 109 list_gccs() {
 110     local gccs
 111     gccs=()
 112     IFS=: read -r -a path_array <<< "$PATH"
 113     while read -r gcc ; do
 114         gccs+=("$gcc")
 115     done < <(find "${path_array[@]}" -maxdepth 1 -regex '.*/gcc-[0-9\.]+$' -printf '%f\n' | sort -t- -k2 -V -r)
 116     echo "${gccs[@]}"
 117 }
 118
 119 # Find the most recent GCC version supported by the kernel sources
 120 select_compiler() {
 121     local selected_cc
 122
 123     cd "$LINUX_SRCOBJ_DIR"
 124
 125     kversion=$(make -s kernelversion)
 126
 127     set +e
 128
 129     for cc in $(list_gccs) ; do
 130         if "${CROSS_COMPILE:-}${cc}" -I include/ -D__LINUX_COMPILER_H -D__LINUX_COMPILER_TYPES_H -E include/linux/compiler-gcc.h; then
 131             cc_version=$(echo "${cc}" | cut -d'-' -f2)
 132             if { verlt "${kversion}" "5.17"; } && { vergt "${cc_version}" "11"; } ; then
 133                 # Using gcc-12+ with '-Wuse-after-free' breaks the build of older
 134                 # kernels (in particular, objtool). Some releases on LTS
 135                 # branches between 4.x and 5.15 can be built with gcc-12.
 136                 # @see https://lore.kernel.org/lkml/20494.1643237814@turing-police/
 137                 # @see https://gitlab.com/linux-kernel/stable/-/commit/52a9dab6d892763b2a8334a568bd4e2c1a6fde66
 138                 continue
 139             fi
 140         selected_cc="$cc"
 141         break
 142       fi
 143     done
 144
 145     set -e
 146
 147     # Force gcc-4.8 for kernels before 4.4
 148     if { verlt "$kversion" "4.4"; }; then
 149         selected_cc='gcc-4.8'
 150     fi
 151
 152     if [ -z "$selected_cc" ]; then
 153       echo "Found no suitable compiler."
 154       exit 1
 155     fi
 156
 157     _KAFLAGS=()
 158     _KCFLAGS=()
 159     _KCPPFLAGS=()
 160     _HOSTCFLAGS=()
 161     if [ "$selected_cc" != "gcc-4.8" ]; then
 162         # Older kernel Makefiles do not expect the compiler to default to PIE
 163         _KAFLAGS+=(-fno-pie)
 164         _KCFLAGS+=(
 165             -fno-pie
 166             -no-pie
 167             -fno-stack-protector
 168         )
 169         _KCPPFLAGS+=(-fno-pie)
 170     fi
 171
 172     selected_cc_version="$(echo "${selected_cc}" | cut -d'-' -f2)"
 173     if { vergte "${selected_cc_version}" "10"; } && { verlt "${kversion}" "5.10"; } ; then
 174         # gcc-10 changed the default from '-fcommon' to '-fno-common', which
 175         # causes a linker failure. '-fcommon' can be set on the HOSTCFLAGS
 176         # to avoid the issue.
 177         # @see https://gitlab.com/linux-kernel/stable/-/commit/e33a814e772cdc36436c8c188d8c42d019fda639
 178         _HOSTCFLAGS+=(-fcommon)
 179     fi
 180
 181     if [ "${cross_arch:-}" == "armhf" ] ; then
 182         if { verlt "${kversion}" "5.14"; } ; then
 183             # Work-around for producing instructions that aren't valid for the
 184             # default architectures.
 185             # Eg. Error: selected processor does not support `cpsid i' in ARM mode
 186             _KCFLAGS+=(-march=armv7-a -mfpu=vfpv3-d16)
 187             _KCPPFLAGS+=(-march=armv7-a -mfpu=vfpv3-d16)
 188         fi
 189     fi
 190
 191     if { vergt "${selected_cc_version}" "8"; } && { vergte "${kversion}" "4.15"; } && { verlt "${kversion}" "4.17"; } ; then
 192         # This was added to -Wall in gcc 9 but some kernels do not include the fixes
 193         # @see https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88583
 194         _KCFLAGS+=(-Wno-error=packed-not-aligned)
 195     fi
 196
 197     export KAFLAGS="${_KAFLAGS[*]}"
 198     export KCFLAGS="${_KCFLAGS[*]}"
 199     export KCPPFLAGS="${_KCPPFLAGS[*]}"
 200     export HOSTCFLAGS="${_HOSTCFLAGS[*]}"
 201     export CC="${CROSS_COMPILE:-}${selected_cc}"
 202     export HOSTCC="${selected_cc}"
 203
 204     make_args=(
 205         CC="${CC}"
 206         HOSTCC="${HOSTCC}"
 207         HOSTCFLAGS="${HOSTCFLAGS:-}"
 208     )
 209     if [ -n "${DEBUG}" ] ; then
 210         make_args+=(
 211             V=1
 212         )
 213     fi
 214     cd -
 215 }
 216
 217 patch_linux_kernel() {
 218     local commit_hash
 219     commit_hash="$1"
 220     set +e
 221     git -C "${LINUX_GIT_REF_REPO_DIR}" format-patch -n1 --stdout "${commit_hash}" | patch -p1
 222     set -e
 223     if [ "$?" -gt 1 ] ; then
 224         echo "Serious issue patching"
 225         exit 1
 226     fi
 227 }
 228
 229 build_linux_kernel() {
 230     cd "$LINUX_SRCOBJ_DIR"
 231
 232     kversion=$(make -s kernelversion "${make_args[@]}")
 233     pahole_version="$(pahole --version | tr -d 'v')"
 234
 235     if { verlt "${kversion}" "3.3"; } && [ "${vanilla_config}" = "imx_v6_v7_defconfig" ] ; then
 236         # imx_v6_v7 didn't exist before 06965c39b4c63933fa0a1cde2237ef85477c5655
 237         if { verlt "${kversion}" "3.2"; } ; then
 238             vanilla_config='mx5_defconfig'
 239         else
 240             vanilla_config='mx51_defconfig'
 241         fi
 242     fi
 243
 244     if { verlt "${kversion}" "3.13"; } && [ "${vanilla_config}" = "pseries_le_defconfig" ] ; then
 245         # pseries_le_deconfig was introduced in f53e462e907cbaed29c49c0f10f5b8f614e1bf1d
 246         vanilla_config='pseries_defconfig'
 247     fi
 248
 249     # Generate kernel configuration
 250     case "$ktag" in
 251       Ubuntu*)
 252         if [ "${cross_arch}" = "powerpc" ]; then
 253           if vergte "${kversion}" "4.10"; then
 254             echo "Ubuntu removed big endian powerpc configuration from kernel >= 4.10. Don't try to build it."
 255             exit 0
 256           fi
 257         fi
 258
 259         fakeroot debian/rules clean KW_DEFCONFIG_DIR=.
 260
 261         # Hack for kernel Ubuntu-hwe-5.8
 262         # The debian/control file is produced by the clean target above, so this
 263         # check needs to happen afterwards.
 264         if [ ! -f "debian/compat" ] && ! grep -q debhelper-compat debian/control; then
 265             echo "10" > "debian/compat"
 266         fi
 267
 268         # genconfigs check can fail in certain cases, eg. when a more recent
 269         # compiler exposes kernel configuration flags which aren't set in the
 270         # Ubuntu annotations.
 271         # In any case, the configuration will be updated with any missing values
 272         # later in our build script.
 273         fakeroot debian/rules genconfigs KW_DEFCONFIG_DIR=. do_skip_checks=true
 274         cp CONFIGS/"${ubuntu_config}" .config
 275         ;;
 276
 277       *)
 278         # Force 32bit build on i386, default is 64bit
 279         if [ "$arch" = "i386" ]; then
 280             export ARCH="i386"
 281         fi
 282
 283         make "${vanilla_config}" "${make_args[@]}"
 284         ;;
 285     esac
 286
 287     if [ "${vanilla_config}" = "pseries_defconfig" ] && [ "${cross_arch}" = "ppc64el" ] ; then
 288         # @see diff <(git show v3.13:arch/powerpc/configs/pseries_defconfig) <(git show v3.13:arch/powerpc/configs/pseries_le_defconfig)
 289         scripts/config --enable CONFIG_CPU_LITTLE_ENDIAN
 290         scripts/config --enable CONFIG_CMA
 291         scripts/config --disable CONFIG_XMON_DEFAULT
 292         # scripts/config --disable CONFIG_VIRTUALIZATION
 293         # scripts/config --disable CONFIG_KVM_BOOK3S_64
 294         scripts/config --disable CONFIG_KVM_BOOK3S_64_HV
 295     fi
 296
 297     # oldnoconfig was renamed in 4.19
 298     if vergte "$kversion" "4.19"; then
 299         update_conf_target="olddefconfig"
 300     else
 301         update_conf_target="oldnoconfig"
 302     fi
 303
 304     # Fix 'defined(@array)' was removed from recent perl
 305     if [ -f "kernel/timeconst.pl" ]; then
 306       sed -i 's/defined(\@\(.*\))/@\1/' kernel/timeconst.pl
 307     fi
 308
 309     # Fix syntax of inline assembly which is confused with C++11 raw strings on gcc >= 5
 310     if [ "$HOSTCC" != "gcc-4.8" ]; then
 311       if [ -f "arch/x86/kvm/svm.c" ]; then
 312         sed -i 's/ R"/ R "/g; s/"R"/" R "/g' arch/x86/kvm/svm.c
 313       fi
 314
 315       if [ -f "arch/x86/kvm/vmx.c" ]; then
 316         sed -i 's/ R"/ R "/g; s/"R"/" R "/g' arch/x86/kvm/vmx.c
 317       fi
 318     fi
 319
 320     if { verlt "${kversion}" "5.11"; } && { vergte "${kversion}" "4.10"; } ; then
 321         # Binutils > 2.35 strips empty symbol tables, causing obltool to fail
 322         # in certain cases when files are empty.
 323         # @see https://gitlab.com/linux-kernel/stable/-/commit/1d489151e9f9d1647110277ff77282fe4d96d09b
 324         #
 325         # There doesn't seem to be any LD/AS/AR flags to control this behaviour,
 326         # therefore patching tools/objtool/elf.c is attempted.
 327         patch_linux_kernel 1d489151e9f9d1647110277ff77282fe4d96d09b
 328         if { verlt "${kversion}" "4.18"; } ; then
 329             patch_linux_kernel e81e0724432542af8d8c702c31e9d82f57b1ff31
 330         fi
 331     fi
 332
 333     if { vergt "${selected_cc_version}" "7"; } && { vergte "${kversion}" "4.14"; } && { verlt "${kversion}" "4.17"; } ; then
 334         # Builds fail due to -Werror=restrict in pager.o and str_error_r.o
 335         if { verlt "${kversion}" "4.16"; } ; then
 336             # This is patched since objtool's Makefile doesn't respect HOSTCFLAGS
 337             # @see https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ad343a98e74e85aa91d844310e797f96fee6983b
 338             patch_linux_kernel ad343a98e74e85aa91d844310e797f96fee6983b
 339         fi
 340         if { verlt "${kversion}" "4.17"; } ; then
 341             # This is patched since objtool's Makefile doesn't respect HOSTCFLAGS
 342             # @see https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=854e55ad289ef8888e7991f0ada85d5846f5afb9
 343             patch_linux_kernel 854e55ad289ef8888e7991f0ada85d5846f5afb9
 344         fi
 345
 346     fi
 347
 348     if { vergt "${selected_cc_version}" "9"; } && { verlt "${kversion}" "5.6"; } ; then
 349         # Duplicate decalarations of __force_order
 350         # @see https://gitlab.com/linux-kernel/stable/-/commit/df6d4f9db79c1a5d6f48b59db35ccd1e9ff9adfc
 351         # However, kaslr_64.c doesn't exit in 4.15, 4.16, it's named pagetable.c
 352         if [ -f arch/x86/boot/compressed/pagetable.c ] ; then
 353             sed -i '/^unsigned long __force_order;$/d' arch/x86/boot/compressed/pagetable.c
 354         fi
 355         if [ -f arch/x86/boot/compressed/kaslr_64.c ] ; then
 356             patch_linux_kernel df6d4f9db79c1a5d6f48b59db35ccd1e9ff9adfc
 357         fi
 358     fi
 359
 360     if { vergte "${kversion}" "4.18"; } && { verlt "${kversion}" "4.19"; } ; then
 361         # In some cases, compiling net/bpfilter can fail with the following error:
 362         #   net/bpfilter/main.c:9:10: fatal error: include/uapi/linux/bpf.h: No such file or directory
 363         #   make[2]: *** [scripts/Makefile.host:107: net/bpfilter/main.o] Error 1
 364         #
 365         # While the issue is potentially in a number of old versions, it has only
 366         # been observed in v4.18-rt
 367         #
 368         patch_linux_kernel 303a339f30a9441c4695d3d2cc78f1b33cd959ff
 369     fi
 370
 371     if { vergte "${kversion}" "4.18"; } && { verlt "${kversion}" "4.19"; } ; then
 372         # In some cases, compiling net/bpfilter can fail with the following error:
 373         #   net/bpfilter/main.c:9:10: fatal error: include/uapi/linux/bpf.h: No such file or directory
 374         #   make[2]: *** [scripts/Makefile.host:107: net/bpfilter/main.o] Error 1
 375         #
 376         # While the issue is potentially in a number of old versions, it has only
 377         # been observed in v4.18-rt
 378         #
 379         patch_linux_kernel 303a339f30a9441c4695d3d2cc78f1b33cd959ff
 380     fi
 381
 382     if { vergte "${kversion}" "4.15"; } && { verlt "${kversion}" "4.18"; } ; then
 383         # Some old kernels fail to build when make is too new
 384         # @see https://gitlab.com/linux-kernel/stable/-/commit/9feeb638cde083c737e295c0547f1b4f28e99583
 385         patch_linux_kernel 9564a8cf422d7b58f6e857e3546d346fa970191e
 386     fi
 387
 388     if { vergte "${kversion}" "4.14"; } && { verlt "${kversion}" "4.14.55"; } ; then
 389         # Some old kernels fail to build when make is too new
 390         # @see https://gitlab.com/linux-kernel/stable/-/commit/9feeb638cde083c737e295c0547f1b4f28e99583
 391         patch_linux_kernel e82885490a611f2b75a6c27cd7bb09665c1740be
 392     fi
 393
 394     if ( { vergte "${kversion}" "4.15"; } && { verlt "${kversion}" "4.18"; } ) || \
 395        ( { vergte "${kversion}" "4.14"; } && { verlt "${kversion}" "4.14.56"; } ) ; then
 396         # Some old kernels fail to build when make is too new
 397         # @see https://gitlab.com/linux-kernel/stable/-/commit/9feeb638cde083c737e295c0547f1b4f28e99583
 398         patch_linux_kernel 9feeb638cde083c737e295c0547f1b4f28e99583
 399     fi
 400
 401     if ( { vergte "${kversion}" "4.12"; } && { verlt "${kversion}" "4.20.17"; } ) || \
 402        ( { vergte "${kversion}" "5.0"; } && { verlt "${kversion}" "5.0.12"; } ) ; then
 403         # Old kernels can fail to build while on newer host kernels with errors
 404         # such as:
 405         #   In file included from scripts/selinux/genheaders/genheaders.c:19:
 406         #   ./security/selinux/include/classmap.h:249:2: error: #error New address family defined, please update secclass_map.
 407         # @see https://gitlab.com/linux-kernel/stable/-/commit/dfbd199a7cfe3e3cd8531e1353cdbd7175bfbc5e
 408         #
 409         patch_linux_kernel dfbd199a7cfe3e3cd8531e1353cdbd7175bfbc5e
 410     fi
 411
 412     if { vergte "${kversion}" "3.18"; } && { verlt "${kversion}" "4.16"; } ; then
 413         # Compatibility with binutils >= ~ 2.31
 414         patch_linux_kernel b21ebf2fb4cde1618915a97cc773e287ff49173e
 415     fi
 416
 417     # The above patch only partially applies linux 3.17, and has been, so a
 418     # rebased version is used instead.
 419     if { vergte "${kversion}" "3.17"; } && { verlt "${kversion}" "3.18"; } ; then
 420         cat <<'EOF' | patch -p1
 421 diff --git a/arch/x86/kernel/machine_kexec_64.c b/arch/x86/kernel/machine_kexec_64.c
 422 index 48598105..0652c5b6 100644
 423 --- a/arch/x86/kernel/machine_kexec_64.c
 424 +++ b/arch/x86/kernel/machine_kexec_64.c
 425 @@ -516,6 +516,7 @@ int arch_kexec_apply_relocations_add(const Elf64_Ehdr *ehdr,
 426                                 goto overflow;
 427                         break;
 428                 case R_X86_64_PC32:
 429 +               case R_X86_64_PLT32:
 430                         value -= (u64)address;
 431                         *(u32 *)location = value;
 432                         break;
 433 diff --git a/arch/x86/kernel/module.c b/arch/x86/kernel/module.c
 434 index e69f9882..7c6bc9fe 100644
 435 --- a/arch/x86/kernel/module.c
 436 +++ b/arch/x86/kernel/module.c
 437 @@ -180,6 +180,7 @@ int apply_relocate_add(Elf64_Shdr *sechdrs,
 438                                 goto overflow;
 439                         break;
 440                 case R_X86_64_PC32:
 441 +               case R_X86_64_PLT32:
 442                         val -= (u64)loc;
 443                         *(u32 *)loc = val;
 444  #if 0
 445 diff --git a/arch/x86/tools/relocs.c b/arch/x86/tools/relocs.c
 446 index bbb1d225..8deeacbc 100644
 447 --- a/arch/x86/tools/relocs.c
 448 +++ b/arch/x86/tools/relocs.c
 449 @@ -763,6 +763,7 @@ static int do_reloc64(struct section *sec, Elf_Rel *rel, ElfW(Sym) *sym,
 450         switch (r_type) {
 451         case R_X86_64_NONE:
 452         case R_X86_64_PC32:
 453 +       case R_X86_64_PLT32:
 454                 /*
 455                  * NONE can be ignored and PC relative relocations don't
 456                  * need to be adjusted.
 457 EOF
 458     fi
 459
 460     if ( { vergte "${kversion}" "3.14"; } && { verlt "${kversion}" "4.4"; } ) ||
 461        ( { vergte "${kversion}" "4.8"; } && { verlt "${kversion}" "4.18"; } ); then
 462         # While the original motivation of this patch is for fixing builds using
 463         # clang, the same error occurs between linux >= 3.14 and < 4.4, and in
 464         # 4.15, 4.16.
 465         # For rt-linux, the error has been observed in 4.8, 4.11, and 4.13.
 466         #
 467         # This patch only partially applies due to changes in kernel/Makefile,
 468         # so a supplementary patch is needed
 469         #
 470         # Without this patch, builds fail with
 471         #   Cannot find symbol for section 2: .text.
 472         #   kernel/elfcore.o: failed
 473         #
 474         # @see https://github.com/linuxppc/issues/issues/388
 475         # @see https://lore.kernel.org/lkml/20201204165742.3815221-2-arnd@kernel.org/
 476         #
 477         patch_linux_kernel 6e7b64b9dd6d96537d816ea07ec26b7dedd397b9
 478         if grep -q elfcore.o kernel/Makefile ; then
 479             sed -i '/^.* += elfcore.o$/d' kernel/Makefile
 480         fi
 481     fi
 482     # Same as above for the v4.4 branch
 483     if ( { vergte "${kversion}" "4.4"; } && { verlt "${kversion}" "4.4.257"; } ); then
 484         patch_linux_kernel 3140b0740b31cc63cf2ee08bc3f746b423eb068d
 485         if grep -q elfcore.o kernel/Makefile ; then
 486             sed -i '/^.* += elfcore.o$/d' kernel/Makefile
 487         fi
 488     fi
 489
 490     if { vergte "${kversion}" "4.5"; } && { verlt "${kversion}" "4.8"; } ; then
 491         # Kernels between v4.5 and v4.8 built with gcc >= 8 on arm will hit an
 492         # assembler error :
 493         #
 494         #  kernel/.tmp_fork.s: Assembler messages:
 495         #  kernel/.tmp_fork.s:1790: Error: .err encountered
 496         #
 497         # @see https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85745
 498         #
 499         patch_linux_kernel 9f73bd8bb445e0cbe4bcef6d4cfc788f1e184007
 500     fi
 501
 502     if ( { vergte "${kversion}" "4.4"; } && { verlt "${kversion}" "4.4.136"; } ) ||
 503        ( { vergte "${kversion}" "4.5"; } && { verlt "${kversion}" "4.8"; } ); then
 504         # Hacky patch to deal with the following build error:
 505         #   Cannot find symbol for section 7: .text.unlikely.
 506         #   kernel/kexec_file.o: failed
 507         #   make[1]: *** [scripts/Makefile.build:291: kernel/kexec_file.o] Error 1
 508         #
 509         # This error happens with binutils 2.36 and 2.37, but should probably not
 510         # be an issue with binutils 2.38.
 511         # @see https://github.com/linuxppc/issues/issues/388
 512         # @see https://github.com/bminor/binutils-gdb/commit/c09c8b42021180eee9495bd50d8b35e683d3901b
 513         #
 514         # There is some sort of config (unspecified in past discussions) which
 515         # provokes the error, and there was never a potential fix merged in
 516         # this discussion, in part because the build systems of the kernel
 517         # switched to objtool instead.
 518         #
 519         # @see https://lore.kernel.org/all/20210215162209.5e2a475b@gandalf.local.home/
 520         #
 521         sed -i 's/return txtname;/return shdr0->sh_size ? txtname : NULL;/' scripts/recordmcount.h
 522
 523         # After applying the above patch, the build continues but fails with
 524         # head64.c:(.text.exit+0x5): undefined reference to `__gcov_exit'
 525         #
 526         scripts/config --disable CONFIG_GCOV_KERNEL
 527     fi
 528
 529     if { vergte "${kversion}" "4.5"; } && { verlt "${kversion}" "4.5.5"; } ; then
 530         # drivers/staging/wilc1000/wilc_spi.c:123:34: error: storage size of ‘wilc1000_spi_ops’ isn’t known
 531         patch_linux_kernel ce7b516f3f9e11fe4ee06fad0d7e853bb6e8f160
 532     fi
 533
 534     # Newer binutils don't accept 3 operand 'cmp' instructions on ppc64
 535     # Convert them to 'cmpw' which was previously done silently
 536     if verlt "$kversion" "4.9"; then
 537             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/"
 538             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/"
 539             sed -i "s/\$pie \-o \"\$ofile\"/\$pie --no-dynamic-linker -o \"\$ofile\"/" arch/powerpc/boot/wrapper
 540     fi
 541
 542     if [ "$(scripts/config --state CONFIG_EXTCON_ADC_JACK)" != "n" ] &&
 543            ( { vergte "${kversion}" "4.2"; } && { verlt "${kversion}" "4.12"; } ); then
 544         # 73b6ecdb93e8e77752cae9077c424fcdc6f23c39 introduced a change where
 545         # extcon-adc-jack.h has an incompatible pointer type.
 546         # In GCC >= 5 this will provoke a warning and build failure.
 547         # Eg.
 548         #   drivers/extcon/extcon-adc-jack.c: In function ‘adc_jack_probe’:
 549         #   drivers/extcon/extcon-adc-jack.c:111:64: error: passing argument 2 of ‘devm_extcon_dev_allocate’ from incompatible pointer type [-Werror=incompatible-pointer-types]
 550         #   make[2]: *** [scripts/Makefile.build:295: drivers/extcon/extcon-adc-jack.o] Error 1
 551         #
 552         # 8a522bf2d4f788306443d36b26b54f0aedcdfdbe (in 4.11) has a fix for this warning
 553         #
 554         patch_linux_kernel 8a522bf2d4f788306443d36b26b54f0aedcdfdbe
 555     fi
 556
 557     if ( { vergte "${kversion}" "4.15"; } && { verlt "${kversion}" "4.15.2"; } ) || \
 558        ( { vergte "${kversion}" "4.14"; } && { verlt "${kversion}" "4.14.18"; } ) ; then
 559         # Fix an objtool Segmentation fault
 560         patch_linux_kernel dd12561854824fd1f05baf2a1b794faa046e2425
 561     fi
 562
 563     if { vergte "${kversion}" "4.14"; } && { verlt "${kversion}" "4.14.268"; } ; then
 564         # Builds fail due to -Werror=use-after-free in sigchain.o and help.o
 565         patch_linux_kernel e89bb266b710ce056f141f29f091fd468a4a8185
 566     fi
 567
 568     # Fix a typo in v2.6.36.x
 569     if [ -f "arch/x86/kernel/entry_64.S" ]; then
 570       sed -i 's/END(do_hypervisor_callback)/END(xen_do_hypervisor_callback)/' arch/x86/kernel/entry_64.S
 571     fi
 572
 573     # Fix compiler switch in vdso Makefile for 2.6.36 to 2.6.36.2
 574     if { vergte "$kversion" "2.6.36" && verlte "$kversion" "2.6.36.3"; }; then
 575       sed -i 's/-m elf_x86_64/-m64/' arch/x86/vdso/Makefile
 576       sed -i 's/-m elf_i386/-m32/' arch/x86/vdso/Makefile
 577     fi
 578
 579     # Fix kernel < 3.0 with gcc >= 4.7
 580     if verlt "$kversion" "3.0"; then
 581       sed -i '/linux\/compiler.h/a #include <linux\/linkage.h> \/* For asmregparm *\/' arch/x86/include/asm/ptrace.h
 582       sed -i 's/extern long syscall_trace_enter/extern asmregparm long syscall_trace_enter/' arch/x86/include/asm/ptrace.h
 583       sed -i 's/extern void syscall_trace_leave/extern asmregparm void syscall_trace_leave/' arch/x86/include/asm/ptrace.h
 584       echo "header-y += linkage.h" >> include/linux/Kbuild
 585     fi
 586
 587     if [ "${cross_arch}" = "powerpc" ] ; then
 588         if { vergte "${kversion}" "4.15"; } && { verlt "${kversion}" "4.16"; } ; then
 589             # Avoid register errors such as
 590             # aes_generic.c:(.text+0x4e0): undefined reference to `_restgpr_31_x'
 591             # @see https://gitlab.com/linux-kernel/stable/-/commit/148b974deea927f5dbb6c468af2707b488bfa2de
 592             make_args+=(
 593                 CFLAGS_aes_generic.o=''
 594             )
 595         fi
 596     fi
 597
 598     if [ "$(scripts/config --state CONFIG_DEBUG_INFO_BTF)" == "y" ] &&
 599            { vergte "${pahole_version}" "1.24"; } &&
 600            { vergte "${kversion}" "5.10"; } && { verlt "${kversion}" "6.0"; } ;then
 601         # Some kernels Eg. Ubuntu-hwe-5.13-5.13.0-52.59_20.04.1
 602         # fail with the following error:
 603         #   BTFIDS  vmlinux
 604         #   FAILED: load BTF from vmlinux: Invalid argument
 605         #
 606         # When CONFIG_DEBUG_INFO_BTF is set, certain versions of pahole require
 607         # `--skip_encoding_btf_enum64` to be passed as the kernel doesn't define
 608         # BTF_KIND_ENUM64.
 609         #
 610         # Introduced in 341dfcf8d78eaa3a2dc96dea06f0392eb2978364 (~v5.10)
 611         # @see https://lore.kernel.org/bpf/20220825171620.cioobudss6ovyrkc@altlinux.org/t/
 612         #
 613         if [ -f "scripts/pahole-flags.sh" ] ; then
 614             sed -i 's/ -J ${PAHOLE_FLAGS} / -J ${PAHOLE_FLAGS} --skip_encoding_btf_enum64 /' scripts/link-vmlinux.sh
 615         else
 616             sed -i 's/ -J ${extra_paholeopt} / -J ${extra_paholeopt} --skip_encoding_btf_enum64 /' scripts/link-vmlinux.sh
 617         fi
 618     fi
 619
 620     # GCC 4.8
 621     if [ "$HOSTCC" == "gcc-4.8" ]; then
 622         scripts/config --disable CONFIG_CC_STACKPROTECTOR_STRONG
 623         scripts/config --disable CONFIG_PPC_OF_BOOT_TRAMPOLINE
 624     fi
 625
 626     # Don't try to sign modules
 627     scripts/config --disable CONFIG_MODULE_SIG
 628
 629     # Disable kernel stack frame correctness validation, introduced in 4.6.0 and currently fails
 630     scripts/config --disable CONFIG_STACK_VALIDATION
 631
 632     # Cause problems with inline assembly on i386
 633     scripts/config --disable CONFIG_DEBUG_SECTION_MISMATCH
 634
 635     # Don't build samples, they are broken on some kernel releases
 636     scripts/config --disable CONFIG_SAMPLES
 637     scripts/config --disable CONFIG_BUILD_DOCSRC
 638
 639     # Disable kcov
 640     scripts/config --disable CONFIG_KCOV
 641
 642     # Broken on some RT kernels
 643     scripts/config --disable CONFIG_HYPERV
 644
 645     # Broken drivers
 646     scripts/config --disable CONFIG_RAPIDIO_TSI721
 647     scripts/config --disable CONFIG_SGI_XP
 648     scripts/config --disable CONFIG_MFD_WM8994
 649     scripts/config --disable CONFIG_DRM_RADEON
 650     scripts/config --disable CONFIG_SND_SOC_WM5100
 651     # More recent compiler optimizations (from gcc 8 onwards )expose build errors
 652     # with netronome on older kernels.
 653     # Observed in 4.11-rt, 4.15-4.17, 5.0-rt - 5.16-rt
 654     # It seems easier to disable the driver than to attempt patching.
 655     # Eg.
 656     #   In function ‘ur_load_imm_any’,
 657     #   inlined from ‘jeq_imm’ at drivers/net/ethernet/netronome/nfp/bpf/jit.c:3146:13:
 658     #   ./include/linux/compiler.h:350:45: error: call to ‘__compiletime_assert_1062’ declared with attribute error: FIELD_FIT: value too large for the field
 659     #   350 |         _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
 660     #
 661     scripts/config --disable CONFIG_NET_VENDOR_NETRONOME
 662     # Eg.
 663     #  In function ‘memcpy’,
 664     #  inlined from ‘kszphy_get_strings’ at drivers/net/phy/micrel.c:664:3:
 665     #  ./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
 666     #  305 |                         __read_overflow2();
 667     #      |                         ^~~~~~~~~~~~~~~~~~
 668     #  make[3]: *** [scripts/Makefile.build:308: drivers/net/phy/micrel.o] Error 1
 669     #
 670     scripts/config --disable CONFIG_MICREL_PHY
 671
 672
 673     # IGBVF won't build with recent gcc on 2.6.38.x
 674     if { vergte "$kversion" "2.6.37" && verlt "$kversion" "2.6.38"; }; then
 675       scripts/config --disable CONFIG_IGBVF
 676     fi
 677
 678     # Don't fail the build on warnings
 679     scripts/config --disable CONFIG_WERROR
 680     scripts/config --enable CONFIG_PPC_DISABLE_WERROR
 681
 682     # Set required options
 683     scripts/config --enable CONFIG_TRACEPOINTS
 684     scripts/config --enable CONFIG_KALLSYMS
 685     scripts/config --enable CONFIG_HIGH_RES_TIMERS
 686     scripts/config --enable CONFIG_KPROBES
 687     scripts/config --enable CONFIG_FTRACE
 688     scripts/config --enable CONFIG_BLK_DEV_IO_TRACE
 689     scripts/config --enable CONFIG_KALLSYMS_ALL
 690     scripts/config --enable CONFIG_HAVE_SYSCALL_TRACEPOINTS
 691     scripts/config --enable CONFIG_PERF_EVENTS
 692     scripts/config --enable CONFIG_EVENT_TRACING
 693     scripts/config --enable CONFIG_KRETPROBES
 694
 695     if [ -n "${DEBUG}" ] ; then
 696         cat .config
 697     fi
 698
 699     make "$update_conf_target" "${make_args[@]}"
 700     make -j"$NPROC" "${make_args[@]}"
 701
 702     krelease=$(make -s kernelrelease "${make_args[@]}")
 703
 704     # Save the kernel and modules
 705     mkdir -p "$LINUX_INSTOBJ_DIR/boot"
 706     make INSTALL_MOD_PATH="$LINUX_INSTOBJ_DIR" INSTALL_MOD_STRIP=1 modules_install "${make_args[@]}"
 707     make INSTALL_MOD_PATH="$LINUX_INSTOBJ_DIR" INSTALL_PATH="$LINUX_INSTOBJ_DIR/boot" install "${make_args[@]}"
 708     rm -f "$LINUX_INSTOBJ_DIR/lib/modules/${krelease}/source" "$LINUX_INSTOBJ_DIR/lib/modules/${krelease}/build"
 709     ln -s ../../../../sources "$LINUX_INSTOBJ_DIR/lib/modules/${krelease}/source"
 710     ln -s ../../../../sources "$LINUX_INSTOBJ_DIR/lib/modules/${krelease}/source"
 711 }
 712
 713
 714 extract_distro_headers() {
 715
 716     # Enter linux source dir
 717     cd "${LINUX_SRCOBJ_DIR}"
 718
 719
 720     # For RT kernels, copy version file
 721     if [ -s localversion-rt ]; then
 722         cp -a localversion-rt "${LINUX_HDROBJ_DIR}"
 723     fi
 724
 725     # Copy all Makefile related stuff
 726     find . -path './include/*' -prune \
 727         -o -path './scripts/*' -prune -o -type f \
 728         \( -name 'Makefile*' -o -name 'Kconfig*' -o -name 'Kbuild*' -o \
 729             -name '*.sh' -o -name '*.pl' -o -name '*.lds' \) \
 730         -print | cpio -pd --preserve-modification-time "${LINUX_HDROBJ_DIR}"
 731
 732     # Copy base scripts and include dirs
 733     cp -a scripts include "${LINUX_HDROBJ_DIR}"
 734
 735     # Copy arch includes
 736     (find arch -name include -type d -print0 | \
 737         xargs -0 -n1 -I '{}' find '{}' -type f) | \
 738         cpio -pd --preserve-modification-time "${LINUX_HDROBJ_DIR}"
 739
 740     # Copy arch scripts
 741     (find arch -name scripts -type d -print0 | \
 742         xargs -0 -n1 -I '{}' find '{}' -type f) | \
 743         cpio -pd --preserve-modification-time "${LINUX_HDROBJ_DIR}"
 744
 745     # Cleanup scripts
 746     rm -f "${LINUX_HDROBJ_DIR}/scripts/*.o"
 747     rm -f "${LINUX_HDROBJ_DIR}/scripts/*/*.o"
 748
 749     # On powerpc 32bits this object is required to link modules
 750     if [ "${karch}" = "powerpc" ]; then
 751         if [ "$(scripts/config -s CONFIG_PPC64)" = "y" ] && vergte "${kversion}" "5.4"; then
 752             :
 753         else
 754             cp -a --parents arch/powerpc/lib/crtsavres.[So] "${LINUX_HDROBJ_DIR}/"
 755         fi
 756     fi
 757
 758     # On arm64 between 4.13 and 1.15 this object is required to build with ftrace support
 759     if [ "${karch}" = "arm64" ]; then
 760         if [ -f "arch/arm64/kernel/ftrace-mod.S" ]; then
 761             cp -a --parents arch/arm64/kernel/ftrace-mod.[So] "${LINUX_HDROBJ_DIR}/"
 762         fi
 763     fi
 764
 765     # Newer kernels need objtool to build modules when CONFIG_STACK_VALIDATION=y
 766     if [ -f tools/objtool/objtool ]; then
 767       cp -a --parents tools/objtool/objtool "${LINUX_HDROBJ_DIR}/"
 768     fi
 769
 770     if [ -f "arch/x86/kernel/macros.s" ]; then
 771       cp -a --parents arch/x86/kernel/macros.s "${LINUX_HDROBJ_DIR}/"
 772     fi
 773
 774     # Copy modules related stuff, if available
 775     if [ -s Module.symvers ]; then
 776         cp Module.symvers "${LINUX_HDROBJ_DIR}"
 777     fi
 778
 779     if [ -s System.map ]; then
 780         cp System.map "${LINUX_HDROBJ_DIR}"
 781     fi
 782
 783     if [ -s Module.markers ]; then
 784         cp Module.markers "${LINUX_HDROBJ_DIR}"
 785     fi
 786
 787     # Copy config file
 788     cp .config "${LINUX_HDROBJ_DIR}"
 789
 790     # Make sure the Makefile and version.h have a matching timestamp so that
 791     # external modules can be built
 792     if [ -s "${LINUX_HDROBJ_DIR}/include/generated/uapi/linux/version.h" ]; then
 793         touch -r "${LINUX_HDROBJ_DIR}/Makefile" "${LINUX_HDROBJ_DIR}/include/generated/uapi/linux/version.h"
 794     elif [ -s "${LINUX_HDROBJ_DIR}/include/linux/version.h" ]; then
 795         touch -r "${LINUX_HDROBJ_DIR}/Makefile" "${LINUX_HDROBJ_DIR}/include/linux/version.h"
 796     else
 797         echo "Missing version.h"
 798         exit 1
 799     fi
 800     touch -r "${LINUX_HDROBJ_DIR}/.config" "${LINUX_HDROBJ_DIR}/include/generated/autoconf.h"
 801
 802     # Copy .config to include/config/auto.conf so "make prepare" is unnecessary.
 803     if [ ! -f "${LINUX_HDROBJ_DIR}/include/config/auto.conf" ]; then
 804         cp "${LINUX_HDROBJ_DIR}/.config" "${LINUX_HDROBJ_DIR}/include/config/auto.conf"
 805     fi
 806
 807     # Finally clean the object files from the full source tree
 808     make clean
 809
 810     # And regen the modules support files
 811     make modules_prepare "${make_args[@]}"
 812
 813     # On powerpc 32bits this object is required to link modules
 814     if [ "${karch}" = "powerpc" ]; then
 815         if [ "$(scripts/config -s CONFIG_PPC64)" = "y" ] && vergte "${kversion}" "5.4"; then
 816             :
 817         else
 818             make arch/powerpc/lib/crtsavres.o "${make_args[@]}"
 819         fi
 820     fi
 821
 822     # On arm64 between 4.13 and 4.15 this object is required to build with ftrace support
 823     if [ "${karch}" = "arm64" ]; then
 824         if [ -f "arch/arm64/kernel/ftrace-mod.S" ]; then
 825             make arch/arm64/kernel/ftrace-mod.o "${make_args[@]}"
 826         fi
 827     fi
 828
 829     # Version specific tasks
 830     case "$ktag" in
 831       Ubuntu*)
 832         # Add Ubuntu ABI number to kernel headers, this is normally done by the packaging code
 833         ABINUM="$(echo "$ktag" | grep -P -o 'Ubuntu-(lts-)?.*-\K\d+(?=\..*)')"
 834         echo "#define UTS_UBUNTU_RELEASE_ABI $ABINUM" >> include/generated/utsrelease.h
 835         echo "#define UTS_UBUNTU_RELEASE_ABI $ABINUM" >> "${LINUX_HDROBJ_DIR}/include/generated/utsrelease.h"
 836         ;;
 837     esac
 838 }
 839
 840
 841 build_modules() {
 842
 843     local kdir="$1"
 844     local outdir="$2"
 845     local kversion
 846
 847     kversion=$(make -C "$LINUX_HDROBJ_DIR" -s kernelversion)
 848
 849     # Try to catch some compatibility problems by turning some
 850     # warnings into errors.
 851     #export KCFLAGS="$KCFLAGS -Wall -Werror"
 852
 853     # Enter lttng-modules source dir
 854     cd "${MODULES_GIT_DIR}"
 855
 856     # kernels 3.10 to 3.10.13 and 3.11 to 3.11.2 introduce a deadlock in the
 857     # timekeeping subsystem. We want those build to fail.
 858     if { vergte "$kversion" "3.10" && verlte "$kversion" "3.10.13"; } || \
 859        { vergte "$kversion" "3.11" && verlte "$kversion" "3.11.2"; }; then
 860
 861         set +e
 862
 863         # Build modules
 864         KERNELDIR="${kdir}" make -j"${NPROC}" V=1 "${make_args[@]}"
 865         ret=$?
 866
 867         set -e
 868
 869         # We expect this build to fail, if it doesn't, fail the job.
 870         if [ "$ret" -eq 0 ]; then
 871             echo "This build should have failed."
 872             exit 1
 873         fi
 874
 875         # We have to publish at least one file or the build will fail
 876         echo "This kernel is broken, there is a deadlock in the timekeeping subsystem." > "${outdir}/BROKEN.txt.ko"
 877
 878         KERNELDIR="${kdir}" make clean
 879
 880     else # Regular build
 881
 882         # Build modules against full kernel sources
 883         KERNELDIR="${kdir}" make -j"${NPROC}" V=1 "${make_args[@]}"
 884
 885         # Install modules to build dir
 886         KERNELDIR="${kdir}" make INSTALL_MOD_PATH="${outdir}" modules_install
 887
 888         # Clean build dir
 889         KERNELDIR="${kdir}" make clean
 890     fi
 891 }
 892
 893
 894 ## MAIN ##
 895
 896 # Use all CPU cores
 897 NPROC=$(nproc)
 898
 899 MODULES_GIT_DIR="${WORKSPACE}/src/lttng-modules"
 900 LINUX_GIT_DIR="${WORKSPACE}/src/linux"
 901
 902 LINUX_OBJ_DIR="${WORKSPACE}/linux"
 903 LINUX_SRCOBJ_DIR="${LINUX_OBJ_DIR}/sources"
 904 LINUX_HDROBJ_DIR="${LINUX_OBJ_DIR}/headers"
 905 LINUX_INSTOBJ_DIR="${LINUX_OBJ_DIR}/install"
 906
 907 MODULES_OUTPUT_KSRC_DIR="${WORKSPACE}/build/lttng-modules-ksrc"
 908 MODULES_OUTPUT_KHDR_DIR="${WORKSPACE}/build/lttng-modules-khdr"
 909
 910 LINUX_GIT_REF_REPO_DIR="$HOME/gitcache/linux-stable.git/"
 911
 912 OBJ_STORE_URL="s3://jenkins"
 913
 914 cd "$WORKSPACE"
 915
 916 # Create build directories
 917 mkdir -p "${LINUX_SRCOBJ_DIR}" "${LINUX_HDROBJ_DIR}" "${LINUX_INSTOBJ_DIR}" "${MODULES_OUTPUT_KSRC_DIR}" "${MODULES_OUTPUT_KHDR_DIR}"
 918
 919 git_clone_modules_sources
 920
 921 # Setup cross compile env if available
 922 if [ "x${cross_arch}" != "x" ]; then
 923
 924     case "$cross_arch" in
 925         "armhf")
 926             karch="arm"
 927             cross_compile="arm-linux-gnueabihf-"
 928             vanilla_config="imx_v6_v7_defconfig"
 929             ubuntu_config="armhf-config.flavour.generic"
 930             ;;
 931
 932         "arm64")
 933             karch="arm64"
 934             cross_compile="aarch64-linux-gnu-"
 935             vanilla_config="defconfig"
 936             ubuntu_config="arm64-config.flavour.generic"
 937             ;;
 938
 939         "powerpc")
 940             karch="powerpc"
 941             cross_compile="powerpc-linux-gnu-"
 942             vanilla_config="ppc44x_defconfig"
 943             ubuntu_config="powerpc-config.flavour.powerpc-smp"
 944             ;;
 945
 946         "ppc64el")
 947             karch="powerpc"
 948             cross_compile="powerpc64le-linux-gnu-"
 949             vanilla_config="pseries_le_defconfig"
 950             ubuntu_config="ppc64el-config.flavour.generic"
 951             ;;
 952
 953         *)
 954             echo "Unsupported cross arch $cross_arch"
 955             exit 1
 956             ;;
 957     esac
 958
 959     # Export variables used by Kbuild for cross compilation
 960     export ARCH="${karch}"
 961     export CROSS_COMPILE="${cross_compile}"
 962
 963 # Set arch specific values if we are not cross compiling
 964 elif [ "x${arch}" != "x" ]; then
 965
 966     case "$arch" in
 967         "i386")
 968             karch="x86"
 969             vanilla_config="allmodconfig"
 970             ubuntu_config="i386-config.flavour.generic"
 971             ;;
 972
 973         "amd64")
 974             karch="x86"
 975             vanilla_config="allmodconfig"
 976             ubuntu_config="amd64-config.flavour.generic"
 977             ;;
 978
 979         "armhf")
 980             karch="arm"
 981             vanilla_config="allmodconfig"
 982             ubuntu_config="armhf-config.flavour.generic"
 983             ;;
 984
 985         "arm64")
 986             karch="arm64"
 987             vanilla_config="allmodconfig"
 988             ubuntu_config="arm64-config.flavour.generic"
 989             ;;
 990
 991         "powerpc")
 992             karch="powerpc"
 993             vanilla_config="allmodconfig"
 994             ubuntu_config="powerpc-config.flavour.powerpc-smp"
 995             ;;
 996
 997         "ppc64el")
 998             karch="powerpc"
 999             vanilla_config="allmodconfig"
1000             ubuntu_config="ppc64el-config.flavour.generic"
1001             ;;
1002
1003         *)
1004             echo "Unsupported arch $arch"
1005             exit 1
1006             ;;
1007     esac
1008 else
1009     echo "No arch or cross_arch specified"
1010     exit 1
1011 fi
1012
1013
1014
1015 # First get the kernel build from the object store, or build it, if it's
1016 # not available.
1017
1018 echo "# Setup endpoint
1019 host_base = obj.internal.efficios.com
1020 host_bucket = obj.internal.efficios.com
1021 bucket_location = us-east-1
1022 use_https = True
1023
1024 # Setup access keys
1025 access_key = jenkins
1026 secret_key = echo123456
1027
1028 # Enable S3 v4 signature APIs
1029 signature_v2 = False" > "$WORKSPACE/.s3cfg"
1030
1031 url_hash="$(echo -n "$kgitrepo" | md5sum | awk '{ print $1 }')"
1032 obj_name="linux.tar.bz2"
1033
1034 if [ -z "${cross_arch}" ]; then
1035         obj_url_prefix="$OBJ_STORE_URL/linux-build/$url_hash/$ktag/platform-${platforms}/$arch/native"
1036 else
1037         obj_url_prefix="$OBJ_STORE_URL/linux-build/$url_hash/$ktag/platform-${platforms}/${cross_arch}"
1038 fi
1039
1040 obj_url="$obj_url_prefix/$obj_name"
1041
1042 set +e
1043 # In s3cmd 2.3, the return code of get when an object does not exist (64)
1044 # is different than in 2.2 (12). The return codes of 's3cmd info' are
1045 # consistent between 2.2 and 2.3.
1046 s3cmd -c "$WORKSPACE/.s3cfg" info "$obj_url"
1047 ret=$?
1048 set -e
1049
1050 case "$ret" in
1051     "0")
1052       s3cmd -c "$WORKSPACE/.s3cfg" get "$obj_url"
1053       extract_archive_obj
1054       ;;
1055
1056     "12")
1057       echo "File not found"
1058
1059       # Build all the things and upload
1060       # then finish the module build...
1061
1062       git_clone_linux_sources
1063       git_export_linux_sources
1064
1065       select_compiler
1066
1067       ## PREPARE FULL LINUX SOURCE TREE
1068       build_linux_kernel
1069
1070       ## EXTRACT DISTRO STYLE KERNEL HEADERS / DEVEL
1071       extract_distro_headers
1072
1073       tar_archive_obj
1074
1075       upload_archive_obj
1076
1077       ;;
1078
1079     *)
1080       echo "Unknown error? Abort"
1081       exit 1
1082       ;;
1083 esac
1084
1085 select_compiler
1086
1087 selected_cc_version="$(echo "${selected_cc}" | cut -d'-' -f2)"
1088 # lttng-modules requires gcc >= 5.1 for aarch64
1089 # @see https://github.com/lttng/lttng-modules/commit/be06402dbdbea2f3394e60ec15c5d3356e2be416
1090 if { verlt "${selected_cc_version}" "5.1"; } && [ "${cross_arch}" = "arm64" ] ; then
1091     echo "Building lltng-modules on aarch64 requires gcc >= 5.1"
1092     exit 0
1093 fi
1094
1095 ## BUILD modules
1096 # Either we downloaded a pre-build kernel or we built it and uploaded
1097 # the archive for future builds.
1098
1099 cd "$WORKSPACE"
1100
1101 # Build modules against full kernel sources
1102 build_modules "${LINUX_SRCOBJ_DIR}" "${MODULES_OUTPUT_KSRC_DIR}"
1103
1104 # Build modules against kernel headers
1105 build_modules "${LINUX_HDROBJ_DIR}" "${MODULES_OUTPUT_KHDR_DIR}"
1106
1107 # Make sure some modules were actually built
1108 tree "${MODULES_OUTPUT_KSRC_DIR}"
1109 if [ "x$(find "${MODULES_OUTPUT_KSRC_DIR}" -name '*.ko*' -printf yes -quit)" != "xyes" ]; then
1110   echo "No modules built!"
1111   exit 1
1112 fi
1113
1114 tree "${MODULES_OUTPUT_KHDR_DIR}"
1115 if [ "x$(find "${MODULES_OUTPUT_KHDR_DIR}" -name '*.ko*' -printf yes -quit)" != "xyes" ]; then
1116   echo "No modules built!"
1117   exit 1
1118 fi
1119
1120 # EOF