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}" "4.15"; } && { 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         # @see https://gitlab.com/linux-kernel/stable/-/commit/9feeb638cde083c737e295c0547f1b4f28e99583
 387         patch_linux_kernel 9feeb638cde083c737e295c0547f1b4f28e99583
 388     fi
 389
 390     if { vergte "${kversion}" "4.12"; } && { verlt "${kversion}" "4.19"; } ; then
 391         # Old kernels can fail to build while on newer host kernels with errors
 392         # such as:
 393         #   In file included from scripts/selinux/genheaders/genheaders.c:19:
 394         #   ./security/selinux/include/classmap.h:249:2: error: #error New address family defined, please update secclass_map.
 395         # @see https://gitlab.com/linux-kernel/stable/-/commit/dfbd199a7cfe3e3cd8531e1353cdbd7175bfbc5e
 396         #
 397         patch_linux_kernel dfbd199a7cfe3e3cd8531e1353cdbd7175bfbc5e
 398     fi
 399
 400     if { vergte "${kversion}" "3.18"; } && { verlt "${kversion}" "4.16"; } ; then
 401         # Compatibility with binutils >= ~ 2.31
 402         patch_linux_kernel b21ebf2fb4cde1618915a97cc773e287ff49173e
 403     fi
 404
 405     # The above patch only partially applies linux 3.17, and has been, so a
 406     # rebased version is used instead.
 407     if { vergte "${kversion}" "3.17"; } && { verlt "${kversion}" "3.18"; } ; then
 408         cat <<'EOF' | patch -p1
 409 diff --git a/arch/x86/kernel/machine_kexec_64.c b/arch/x86/kernel/machine_kexec_64.c
 410 index 48598105..0652c5b6 100644
 411 --- a/arch/x86/kernel/machine_kexec_64.c
 412 +++ b/arch/x86/kernel/machine_kexec_64.c
 413 @@ -516,6 +516,7 @@ int arch_kexec_apply_relocations_add(const Elf64_Ehdr *ehdr,
 414                                 goto overflow;
 415                         break;
 416                 case R_X86_64_PC32:
 417 +               case R_X86_64_PLT32:
 418                         value -= (u64)address;
 419                         *(u32 *)location = value;
 420                         break;
 421 diff --git a/arch/x86/kernel/module.c b/arch/x86/kernel/module.c
 422 index e69f9882..7c6bc9fe 100644
 423 --- a/arch/x86/kernel/module.c
 424 +++ b/arch/x86/kernel/module.c
 425 @@ -180,6 +180,7 @@ int apply_relocate_add(Elf64_Shdr *sechdrs,
 426                                 goto overflow;
 427                         break;
 428                 case R_X86_64_PC32:
 429 +               case R_X86_64_PLT32:
 430                         val -= (u64)loc;
 431                         *(u32 *)loc = val;
 432  #if 0
 433 diff --git a/arch/x86/tools/relocs.c b/arch/x86/tools/relocs.c
 434 index bbb1d225..8deeacbc 100644
 435 --- a/arch/x86/tools/relocs.c
 436 +++ b/arch/x86/tools/relocs.c
 437 @@ -763,6 +763,7 @@ static int do_reloc64(struct section *sec, Elf_Rel *rel, ElfW(Sym) *sym,
 438         switch (r_type) {
 439         case R_X86_64_NONE:
 440         case R_X86_64_PC32:
 441 +       case R_X86_64_PLT32:
 442                 /*
 443                  * NONE can be ignored and PC relative relocations don't
 444                  * need to be adjusted.
 445 EOF
 446     fi
 447
 448     if ( { vergte "${kversion}" "3.14"; } && { verlt "${kversion}" "4.4"; } ) ||
 449        ( { vergte "${kversion}" "4.8"; } && { verlt "${kversion}" "4.18"; } ); then
 450         # While the original motivation of this patch is for fixing builds using
 451         # clang, the same error occurs between linux >= 3.14 and < 4.4, and in
 452         # 4.15, 4.16.
 453         # For rt-linux, the error has been observed in 4.8, 4.11, and 4.13.
 454         #
 455         # This patch only partially applies due to changes in kernel/Makefile,
 456         # so a supplementary patch is needed
 457         #
 458         # Without this patch, builds fail with
 459         #   Cannot find symbol for section 2: .text.
 460         #   kernel/elfcore.o: failed
 461         #
 462         # @see https://github.com/linuxppc/issues/issues/388
 463         # @see https://lore.kernel.org/lkml/20201204165742.3815221-2-arnd@kernel.org/
 464         #
 465         patch_linux_kernel 6e7b64b9dd6d96537d816ea07ec26b7dedd397b9
 466         if grep -q elfcore.o kernel/Makefile ; then
 467             sed -i '/^.* += elfcore.o$/d' kernel/Makefile
 468         fi
 469     fi
 470     # Same as above for the v4.4 branch
 471     if ( { vergte "${kversion}" "4.4"; } && { verlt "${kversion}" "4.4.257"; } ); then
 472         patch_linux_kernel 3140b0740b31cc63cf2ee08bc3f746b423eb068d
 473         if grep -q elfcore.o kernel/Makefile ; then
 474             sed -i '/^.* += elfcore.o$/d' kernel/Makefile
 475         fi
 476     fi
 477
 478     if { vergte "${kversion}" "4.5"; } && { verlt "${kversion}" "4.8"; } ; then
 479         # Kernels between v4.5 and v4.8 built with gcc >= 8 on arm will hit an
 480         # assembler error :
 481         #
 482         #  kernel/.tmp_fork.s: Assembler messages:
 483         #  kernel/.tmp_fork.s:1790: Error: .err encountered
 484         #
 485         # @see https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85745
 486         #
 487         patch_linux_kernel 9f73bd8bb445e0cbe4bcef6d4cfc788f1e184007
 488     fi
 489
 490     if [ "${kversion}" == "4.6.7" ] ; then
 491         # Hacky patch to deal with the following build error:
 492         #   Cannot find symbol for section 7: .text.unlikely.
 493         #   kernel/kexec_file.o: failed
 494         #   make[1]: *** [scripts/Makefile.build:291: kernel/kexec_file.o] Error 1
 495         #
 496         # This error happens with binutils 2.36 and 2.37, but should probably not
 497         # be an issue with binutils 2.38.
 498         # @see https://github.com/linuxppc/issues/issues/388
 499         # @see https://github.com/bminor/binutils-gdb/commit/c09c8b42021180eee9495bd50d8b35e683d3901b
 500         #
 501         # There is some sort of config (unspecified in past discussions) which
 502         # provokes the error, and there was never a potential fix merged in
 503         # this discussion, in part because the build systems of the kernel
 504         # switched to objtool instead.
 505         #
 506         # @see https://lore.kernel.org/all/20210215162209.5e2a475b@gandalf.local.home/
 507         #
 508         sed -i 's/return txtname;/return shdr0->sh_size ? txtname : NULL;/' scripts/recordmcount.h
 509
 510         # After applying the above patch, the build continues but fails with
 511         # head64.c:(.text.exit+0x5): undefined reference to `__gcov_exit'
 512         #
 513         scripts/config --disable CONFIG_GCOV_KERNEL
 514     fi
 515
 516     # Newer binutils don't accept 3 operand 'cmp' instructions on ppc64
 517     # Convert them to 'cmpw' which was previously done silently
 518     if verlt "$kversion" "4.9"; then
 519             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/"
 520             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/"
 521             sed -i "s/\$pie \-o \"\$ofile\"/\$pie --no-dynamic-linker -o \"\$ofile\"/" arch/powerpc/boot/wrapper
 522     fi
 523
 524     if [ "$(scripts/config --state CONFIG_EXTCON_ADC_JACK)" != "n" ] &&
 525            ( { vergte "${kversion}" "4.2"; } && { verlt "${kversion}" "4.12"; } ); then
 526         # 73b6ecdb93e8e77752cae9077c424fcdc6f23c39 introduced a change where
 527         # extcon-adc-jack.h has an incompatible pointer type.
 528         # In GCC >= 5 this will provoke a warning and build failure.
 529         # Eg.
 530         #   drivers/extcon/extcon-adc-jack.c: In function ‘adc_jack_probe’:
 531         #   drivers/extcon/extcon-adc-jack.c:111:64: error: passing argument 2 of ‘devm_extcon_dev_allocate’ from incompatible pointer type [-Werror=incompatible-pointer-types]
 532         #   make[2]: *** [scripts/Makefile.build:295: drivers/extcon/extcon-adc-jack.o] Error 1
 533         #
 534         # 8a522bf2d4f788306443d36b26b54f0aedcdfdbe (in 4.11) has a fix for this warning
 535         #
 536         patch_linux_kernel 8a522bf2d4f788306443d36b26b54f0aedcdfdbe
 537     fi
 538
 539     # Fix a typo in v2.6.36.x
 540     if [ -f "arch/x86/kernel/entry_64.S" ]; then
 541       sed -i 's/END(do_hypervisor_callback)/END(xen_do_hypervisor_callback)/' arch/x86/kernel/entry_64.S
 542     fi
 543
 544     # Fix compiler switch in vdso Makefile for 2.6.36 to 2.6.36.2
 545     if { vergte "$kversion" "2.6.36" && verlte "$kversion" "2.6.36.3"; }; then
 546       sed -i 's/-m elf_x86_64/-m64/' arch/x86/vdso/Makefile
 547       sed -i 's/-m elf_i386/-m32/' arch/x86/vdso/Makefile
 548     fi
 549
 550     # Fix kernel < 3.0 with gcc >= 4.7
 551     if verlt "$kversion" "3.0"; then
 552       sed -i '/linux\/compiler.h/a #include <linux\/linkage.h> \/* For asmregparm *\/' arch/x86/include/asm/ptrace.h
 553       sed -i 's/extern long syscall_trace_enter/extern asmregparm long syscall_trace_enter/' arch/x86/include/asm/ptrace.h
 554       sed -i 's/extern void syscall_trace_leave/extern asmregparm void syscall_trace_leave/' arch/x86/include/asm/ptrace.h
 555       echo "header-y += linkage.h" >> include/linux/Kbuild
 556     fi
 557
 558     if [ "${cross_arch}" = "powerpc" ] ; then
 559         if { vergte "${kversion}" "4.15"; } && { verlt "${kversion}" "4.16"; } ; then
 560             # Avoid register errors such as
 561             # aes_generic.c:(.text+0x4e0): undefined reference to `_restgpr_31_x'
 562             # @see https://gitlab.com/linux-kernel/stable/-/commit/148b974deea927f5dbb6c468af2707b488bfa2de
 563             make_args+=(
 564                 CFLAGS_aes_generic.o=''
 565             )
 566         fi
 567     fi
 568
 569     if [ "$(scripts/config --state CONFIG_DEBUG_INFO_BTF)" == "y" ] &&
 570            { vergte "${pahole_version}" "1.24"; } &&
 571            { vergte "${kversion}" "5.10"; } && { verlt "${kversion}" "6.0"; } ;then
 572         # Some kernels Eg. Ubuntu-hwe-5.13-5.13.0-52.59_20.04.1
 573         # fail with the following error:
 574         #   BTFIDS  vmlinux
 575         #   FAILED: load BTF from vmlinux: Invalid argument
 576         #
 577         # When CONFIG_DEBUG_INFO_BTF is set, certain versions of pahole require
 578         # `--skip_encoding_btf_enum64` to be passed as the kernel doesn't define
 579         # BTF_KIND_ENUM64.
 580         #
 581         # Introduced in 341dfcf8d78eaa3a2dc96dea06f0392eb2978364 (~v5.10)
 582         # @see https://lore.kernel.org/bpf/20220825171620.cioobudss6ovyrkc@altlinux.org/t/
 583         #
 584         if [ -f "scripts/pahole-flags.sh" ] ; then
 585             sed -i 's/ -J ${PAHOLE_FLAGS} / -J ${PAHOLE_FLAGS} --skip_encoding_btf_enum64 /' scripts/link-vmlinux.sh
 586         else
 587             sed -i 's/ -J ${extra_paholeopt} / -J ${extra_paholeopt} --skip_encoding_btf_enum64 /' scripts/link-vmlinux.sh
 588         fi
 589     fi
 590
 591     # GCC 4.8
 592     if [ "$HOSTCC" == "gcc-4.8" ]; then
 593         scripts/config --disable CONFIG_CC_STACKPROTECTOR_STRONG
 594         scripts/config --disable CONFIG_PPC_OF_BOOT_TRAMPOLINE
 595     fi
 596
 597     # Don't try to sign modules
 598     scripts/config --disable CONFIG_MODULE_SIG
 599
 600     # Disable kernel stack frame correctness validation, introduced in 4.6.0 and currently fails
 601     scripts/config --disable CONFIG_STACK_VALIDATION
 602
 603     # Cause problems with inline assembly on i386
 604     scripts/config --disable CONFIG_DEBUG_SECTION_MISMATCH
 605
 606     # Don't build samples, they are broken on some kernel releases
 607     scripts/config --disable CONFIG_SAMPLES
 608     scripts/config --disable CONFIG_BUILD_DOCSRC
 609
 610     # Disable kcov
 611     scripts/config --disable CONFIG_KCOV
 612
 613     # Broken on some RT kernels
 614     scripts/config --disable CONFIG_HYPERV
 615
 616     # Broken drivers
 617     scripts/config --disable CONFIG_RAPIDIO_TSI721
 618     scripts/config --disable CONFIG_SGI_XP
 619     scripts/config --disable CONFIG_MFD_WM8994
 620     scripts/config --disable CONFIG_DRM_RADEON
 621     scripts/config --disable CONFIG_SND_SOC_WM5100
 622     # More recent compiler optimizations (from gcc 8 onwards )expose build errors
 623     # with netronome on older kernels.
 624     # Observed in 4.11-rt, 4.15-4.17, 5.0-rt - 5.16-rt
 625     # It seems easier to disable the driver than to attempt patching.
 626     # Eg.
 627     #   In function ‘ur_load_imm_any’,
 628     #   inlined from ‘jeq_imm’ at drivers/net/ethernet/netronome/nfp/bpf/jit.c:3146:13:
 629     #   ./include/linux/compiler.h:350:45: error: call to ‘__compiletime_assert_1062’ declared with attribute error: FIELD_FIT: value too large for the field
 630     #   350 |         _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
 631     #
 632     scripts/config --disable CONFIG_NET_VENDOR_NETRONOME
 633     # Eg.
 634     #  In function ‘memcpy’,
 635     #  inlined from ‘kszphy_get_strings’ at drivers/net/phy/micrel.c:664:3:
 636     #  ./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
 637     #  305 |                         __read_overflow2();
 638     #      |                         ^~~~~~~~~~~~~~~~~~
 639     #  make[3]: *** [scripts/Makefile.build:308: drivers/net/phy/micrel.o] Error 1
 640     #
 641     scripts/config --disable CONFIG_MICREL_PHY
 642
 643
 644     # IGBVF won't build with recent gcc on 2.6.38.x
 645     if { vergte "$kversion" "2.6.37" && verlt "$kversion" "2.6.38"; }; then
 646       scripts/config --disable CONFIG_IGBVF
 647     fi
 648
 649     # Don't fail the build on warnings
 650     scripts/config --disable CONFIG_WERROR
 651     scripts/config --enable CONFIG_PPC_DISABLE_WERROR
 652
 653     # Set required options
 654     scripts/config --enable CONFIG_TRACEPOINTS
 655     scripts/config --enable CONFIG_KALLSYMS
 656     scripts/config --enable CONFIG_HIGH_RES_TIMERS
 657     scripts/config --enable CONFIG_KPROBES
 658     scripts/config --enable CONFIG_FTRACE
 659     scripts/config --enable CONFIG_BLK_DEV_IO_TRACE
 660     scripts/config --enable CONFIG_KALLSYMS_ALL
 661     scripts/config --enable CONFIG_HAVE_SYSCALL_TRACEPOINTS
 662     scripts/config --enable CONFIG_PERF_EVENTS
 663     scripts/config --enable CONFIG_EVENT_TRACING
 664     scripts/config --enable CONFIG_KRETPROBES
 665
 666     if [ -n "${DEBUG}" ] ; then
 667         cat .config
 668     fi
 669
 670     make "$update_conf_target" "${make_args[@]}"
 671     make -j"$NPROC" "${make_args[@]}"
 672
 673     krelease=$(make -s kernelrelease "${make_args[@]}")
 674
 675     # Save the kernel and modules
 676     mkdir -p "$LINUX_INSTOBJ_DIR/boot"
 677     make INSTALL_MOD_PATH="$LINUX_INSTOBJ_DIR" INSTALL_MOD_STRIP=1 modules_install "${make_args[@]}"
 678     make INSTALL_MOD_PATH="$LINUX_INSTOBJ_DIR" INSTALL_PATH="$LINUX_INSTOBJ_DIR/boot" install "${make_args[@]}"
 679     rm -f "$LINUX_INSTOBJ_DIR/lib/modules/${krelease}/source" "$LINUX_INSTOBJ_DIR/lib/modules/${krelease}/build"
 680     ln -s ../../../../sources "$LINUX_INSTOBJ_DIR/lib/modules/${krelease}/source"
 681     ln -s ../../../../sources "$LINUX_INSTOBJ_DIR/lib/modules/${krelease}/source"
 682 }
 683
 684
 685 extract_distro_headers() {
 686
 687     # Enter linux source dir
 688     cd "${LINUX_SRCOBJ_DIR}"
 689
 690
 691     # For RT kernels, copy version file
 692     if [ -s localversion-rt ]; then
 693         cp -a localversion-rt "${LINUX_HDROBJ_DIR}"
 694     fi
 695
 696     # Copy all Makefile related stuff
 697     find . -path './include/*' -prune \
 698         -o -path './scripts/*' -prune -o -type f \
 699         \( -name 'Makefile*' -o -name 'Kconfig*' -o -name 'Kbuild*' -o \
 700             -name '*.sh' -o -name '*.pl' -o -name '*.lds' \) \
 701         -print | cpio -pd --preserve-modification-time "${LINUX_HDROBJ_DIR}"
 702
 703     # Copy base scripts and include dirs
 704     cp -a scripts include "${LINUX_HDROBJ_DIR}"
 705
 706     # Copy arch includes
 707     (find arch -name include -type d -print0 | \
 708         xargs -0 -n1 -I '{}' find '{}' -type f) | \
 709         cpio -pd --preserve-modification-time "${LINUX_HDROBJ_DIR}"
 710
 711     # Copy arch scripts
 712     (find arch -name scripts -type d -print0 | \
 713         xargs -0 -n1 -I '{}' find '{}' -type f) | \
 714         cpio -pd --preserve-modification-time "${LINUX_HDROBJ_DIR}"
 715
 716     # Cleanup scripts
 717     rm -f "${LINUX_HDROBJ_DIR}/scripts/*.o"
 718     rm -f "${LINUX_HDROBJ_DIR}/scripts/*/*.o"
 719
 720     # On powerpc 32bits this object is required to link modules
 721     if [ "${karch}" = "powerpc" ]; then
 722         if [ "$(scripts/config -s CONFIG_PPC64)" = "y" ] && vergte "${kversion}" "5.4"; then
 723             :
 724         else
 725             cp -a --parents arch/powerpc/lib/crtsavres.[So] "${LINUX_HDROBJ_DIR}/"
 726         fi
 727     fi
 728
 729     # On arm64 between 4.13 and 1.15 this object is required to build with ftrace support
 730     if [ "${karch}" = "arm64" ]; then
 731         if [ -f "arch/arm64/kernel/ftrace-mod.S" ]; then
 732             cp -a --parents arch/arm64/kernel/ftrace-mod.[So] "${LINUX_HDROBJ_DIR}/"
 733         fi
 734     fi
 735
 736     # Newer kernels need objtool to build modules when CONFIG_STACK_VALIDATION=y
 737     if [ -f tools/objtool/objtool ]; then
 738       cp -a --parents tools/objtool/objtool "${LINUX_HDROBJ_DIR}/"
 739     fi
 740
 741     if [ -f "arch/x86/kernel/macros.s" ]; then
 742       cp -a --parents arch/x86/kernel/macros.s "${LINUX_HDROBJ_DIR}/"
 743     fi
 744
 745     # Copy modules related stuff, if available
 746     if [ -s Module.symvers ]; then
 747         cp Module.symvers "${LINUX_HDROBJ_DIR}"
 748     fi
 749
 750     if [ -s System.map ]; then
 751         cp System.map "${LINUX_HDROBJ_DIR}"
 752     fi
 753
 754     if [ -s Module.markers ]; then
 755         cp Module.markers "${LINUX_HDROBJ_DIR}"
 756     fi
 757
 758     # Copy config file
 759     cp .config "${LINUX_HDROBJ_DIR}"
 760
 761     # Make sure the Makefile and version.h have a matching timestamp so that
 762     # external modules can be built
 763     if [ -s "${LINUX_HDROBJ_DIR}/include/generated/uapi/linux/version.h" ]; then
 764         touch -r "${LINUX_HDROBJ_DIR}/Makefile" "${LINUX_HDROBJ_DIR}/include/generated/uapi/linux/version.h"
 765     elif [ -s "${LINUX_HDROBJ_DIR}/include/linux/version.h" ]; then
 766         touch -r "${LINUX_HDROBJ_DIR}/Makefile" "${LINUX_HDROBJ_DIR}/include/linux/version.h"
 767     else
 768         echo "Missing version.h"
 769         exit 1
 770     fi
 771     touch -r "${LINUX_HDROBJ_DIR}/.config" "${LINUX_HDROBJ_DIR}/include/generated/autoconf.h"
 772
 773     # Copy .config to include/config/auto.conf so "make prepare" is unnecessary.
 774     if [ ! -f "${LINUX_HDROBJ_DIR}/include/config/auto.conf" ]; then
 775         cp "${LINUX_HDROBJ_DIR}/.config" "${LINUX_HDROBJ_DIR}/include/config/auto.conf"
 776     fi
 777
 778     # Finally clean the object files from the full source tree
 779     make clean
 780
 781     # And regen the modules support files
 782     make modules_prepare "${make_args[@]}"
 783
 784     # On powerpc 32bits this object is required to link modules
 785     if [ "${karch}" = "powerpc" ]; then
 786         if [ "$(scripts/config -s CONFIG_PPC64)" = "y" ] && vergte "${kversion}" "5.4"; then
 787             :
 788         else
 789             make arch/powerpc/lib/crtsavres.o "${make_args[@]}"
 790         fi
 791     fi
 792
 793     # On arm64 between 4.13 and 4.15 this object is required to build with ftrace support
 794     if [ "${karch}" = "arm64" ]; then
 795         if [ -f "arch/arm64/kernel/ftrace-mod.S" ]; then
 796             make arch/arm64/kernel/ftrace-mod.o "${make_args[@]}"
 797         fi
 798     fi
 799
 800     # Version specific tasks
 801     case "$ktag" in
 802       Ubuntu*)
 803         # Add Ubuntu ABI number to kernel headers, this is normally done by the packaging code
 804         ABINUM="$(echo "$ktag" | grep -P -o 'Ubuntu-(lts-)?.*-\K\d+(?=\..*)')"
 805         echo "#define UTS_UBUNTU_RELEASE_ABI $ABINUM" >> include/generated/utsrelease.h
 806         echo "#define UTS_UBUNTU_RELEASE_ABI $ABINUM" >> "${LINUX_HDROBJ_DIR}/include/generated/utsrelease.h"
 807         ;;
 808     esac
 809 }
 810
 811
 812 build_modules() {
 813
 814     local kdir="$1"
 815     local outdir="$2"
 816     local kversion
 817
 818     kversion=$(make -C "$LINUX_HDROBJ_DIR" -s kernelversion)
 819
 820     # Try to catch some compatibility problems by turning some
 821     # warnings into errors.
 822     #export KCFLAGS="$KCFLAGS -Wall -Werror"
 823
 824     # Enter lttng-modules source dir
 825     cd "${MODULES_GIT_DIR}"
 826
 827     # kernels 3.10 to 3.10.13 and 3.11 to 3.11.2 introduce a deadlock in the
 828     # timekeeping subsystem. We want those build to fail.
 829     if { vergte "$kversion" "3.10" && verlte "$kversion" "3.10.13"; } || \
 830        { vergte "$kversion" "3.11" && verlte "$kversion" "3.11.2"; }; then
 831
 832         set +e
 833
 834         # Build modules
 835         KERNELDIR="${kdir}" make -j"${NPROC}" V=1 "${make_args[@]}"
 836         ret=$?
 837
 838         set -e
 839
 840         # We expect this build to fail, if it doesn't, fail the job.
 841         if [ "$ret" -eq 0 ]; then
 842             echo "This build should have failed."
 843             exit 1
 844         fi
 845
 846         # We have to publish at least one file or the build will fail
 847         echo "This kernel is broken, there is a deadlock in the timekeeping subsystem." > "${outdir}/BROKEN.txt.ko"
 848
 849         KERNELDIR="${kdir}" make clean
 850
 851     else # Regular build
 852
 853         # Build modules against full kernel sources
 854         KERNELDIR="${kdir}" make -j"${NPROC}" V=1 "${make_args[@]}"
 855
 856         # Install modules to build dir
 857         KERNELDIR="${kdir}" make INSTALL_MOD_PATH="${outdir}" modules_install
 858
 859         # Clean build dir
 860         KERNELDIR="${kdir}" make clean
 861     fi
 862 }
 863
 864
 865 ## MAIN ##
 866
 867 # Use all CPU cores
 868 NPROC=$(nproc)
 869
 870 MODULES_GIT_DIR="${WORKSPACE}/src/lttng-modules"
 871 LINUX_GIT_DIR="${WORKSPACE}/src/linux"
 872
 873 LINUX_OBJ_DIR="${WORKSPACE}/linux"
 874 LINUX_SRCOBJ_DIR="${LINUX_OBJ_DIR}/sources"
 875 LINUX_HDROBJ_DIR="${LINUX_OBJ_DIR}/headers"
 876 LINUX_INSTOBJ_DIR="${LINUX_OBJ_DIR}/install"
 877
 878 MODULES_OUTPUT_KSRC_DIR="${WORKSPACE}/build/lttng-modules-ksrc"
 879 MODULES_OUTPUT_KHDR_DIR="${WORKSPACE}/build/lttng-modules-khdr"
 880
 881 LINUX_GIT_REF_REPO_DIR="$HOME/gitcache/linux-stable.git/"
 882
 883 OBJ_STORE_URL="s3://jenkins"
 884
 885 cd "$WORKSPACE"
 886
 887 # Create build directories
 888 mkdir -p "${LINUX_SRCOBJ_DIR}" "${LINUX_HDROBJ_DIR}" "${LINUX_INSTOBJ_DIR}" "${MODULES_OUTPUT_KSRC_DIR}" "${MODULES_OUTPUT_KHDR_DIR}"
 889
 890 git_clone_modules_sources
 891
 892 # Setup cross compile env if available
 893 if [ "x${cross_arch}" != "x" ]; then
 894
 895     case "$cross_arch" in
 896         "armhf")
 897             karch="arm"
 898             cross_compile="arm-linux-gnueabihf-"
 899             vanilla_config="imx_v6_v7_defconfig"
 900             ubuntu_config="armhf-config.flavour.generic"
 901             ;;
 902
 903         "arm64")
 904             karch="arm64"
 905             cross_compile="aarch64-linux-gnu-"
 906             vanilla_config="defconfig"
 907             ubuntu_config="arm64-config.flavour.generic"
 908             ;;
 909
 910         "powerpc")
 911             karch="powerpc"
 912             cross_compile="powerpc-linux-gnu-"
 913             vanilla_config="ppc44x_defconfig"
 914             ubuntu_config="powerpc-config.flavour.powerpc-smp"
 915             ;;
 916
 917         "ppc64el")
 918             karch="powerpc"
 919             cross_compile="powerpc64le-linux-gnu-"
 920             vanilla_config="pseries_le_defconfig"
 921             ubuntu_config="ppc64el-config.flavour.generic"
 922             ;;
 923
 924         *)
 925             echo "Unsupported cross arch $cross_arch"
 926             exit 1
 927             ;;
 928     esac
 929
 930     # Export variables used by Kbuild for cross compilation
 931     export ARCH="${karch}"
 932     export CROSS_COMPILE="${cross_compile}"
 933
 934 # Set arch specific values if we are not cross compiling
 935 elif [ "x${arch}" != "x" ]; then
 936
 937     case "$arch" in
 938         "i386")
 939             karch="x86"
 940             vanilla_config="allmodconfig"
 941             ubuntu_config="i386-config.flavour.generic"
 942             ;;
 943
 944         "amd64")
 945             karch="x86"
 946             vanilla_config="allmodconfig"
 947             ubuntu_config="amd64-config.flavour.generic"
 948             ;;
 949
 950         "armhf")
 951             karch="arm"
 952             vanilla_config="allmodconfig"
 953             ubuntu_config="armhf-config.flavour.generic"
 954             ;;
 955
 956         "arm64")
 957             karch="arm64"
 958             vanilla_config="allmodconfig"
 959             ubuntu_config="arm64-config.flavour.generic"
 960             ;;
 961
 962         "powerpc")
 963             karch="powerpc"
 964             vanilla_config="allmodconfig"
 965             ubuntu_config="powerpc-config.flavour.powerpc-smp"
 966             ;;
 967
 968         "ppc64el")
 969             karch="powerpc"
 970             vanilla_config="allmodconfig"
 971             ubuntu_config="ppc64el-config.flavour.generic"
 972             ;;
 973
 974         *)
 975             echo "Unsupported arch $arch"
 976             exit 1
 977             ;;
 978     esac
 979 else
 980     echo "No arch or cross_arch specified"
 981     exit 1
 982 fi
 983
 984
 985
 986 # First get the kernel build from the object store, or build it, if it's
 987 # not available.
 988
 989 echo "# Setup endpoint
 990 host_base = obj.internal.efficios.com
 991 host_bucket = obj.internal.efficios.com
 992 bucket_location = us-east-1
 993 use_https = True
 994
 995 # Setup access keys
 996 access_key = jenkins
 997 secret_key = echo123456
 998
 999 # Enable S3 v4 signature APIs
1000 signature_v2 = False" > "$WORKSPACE/.s3cfg"
1001
1002 url_hash="$(echo -n "$kgitrepo" | md5sum | awk '{ print $1 }')"
1003 obj_name="linux.tar.bz2"
1004
1005 if [ -z "${cross_arch}" ]; then
1006         obj_url_prefix="$OBJ_STORE_URL/linux-build/$url_hash/$ktag/platform-${platforms}/$arch/native"
1007 else
1008         obj_url_prefix="$OBJ_STORE_URL/linux-build/$url_hash/$ktag/platform-${platforms}/${cross_arch}"
1009 fi
1010
1011 obj_url="$obj_url_prefix/$obj_name"
1012
1013 set +e
1014 # In s3cmd 2.3, the return code of get when an object does not exist (64)
1015 # is different than in 2.2 (12). The return codes of 's3cmd info' are
1016 # consistent between 2.2 and 2.3.
1017 s3cmd -c "$WORKSPACE/.s3cfg" info "$obj_url"
1018 ret=$?
1019 set -e
1020
1021 case "$ret" in
1022     "0")
1023       s3cmd -c "$WORKSPACE/.s3cfg" get "$obj_url"
1024       extract_archive_obj
1025       ;;
1026
1027     "12")
1028       echo "File not found"
1029
1030       # Build all the things and upload
1031       # then finish the module build...
1032
1033       git_clone_linux_sources
1034       git_export_linux_sources
1035
1036       select_compiler
1037
1038       ## PREPARE FULL LINUX SOURCE TREE
1039       build_linux_kernel
1040
1041       ## EXTRACT DISTRO STYLE KERNEL HEADERS / DEVEL
1042       extract_distro_headers
1043
1044       tar_archive_obj
1045
1046       upload_archive_obj
1047
1048       ;;
1049
1050     *)
1051       echo "Unknown error? Abort"
1052       exit 1
1053       ;;
1054 esac
1055
1056 select_compiler
1057
1058 selected_cc_version="$(echo "${selected_cc}" | cut -d'-' -f2)"
1059 # lttng-modules requires gcc >= 5.1 for aarch64
1060 # @see https://github.com/lttng/lttng-modules/commit/be06402dbdbea2f3394e60ec15c5d3356e2be416
1061 if { verlt "${selected_cc_version}" "5.1"; } && [ "${cross_arch}" = "arm64" ] ; then
1062     echo "Building lltng-modules on aarch64 requires gcc >= 5.1"
1063     exit 0
1064 fi
1065
1066 ## BUILD modules
1067 # Either we downloaded a pre-build kernel or we built it and uploaded
1068 # the archive for future builds.
1069
1070 cd "$WORKSPACE"
1071
1072 # Build modules against full kernel sources
1073 build_modules "${LINUX_SRCOBJ_DIR}" "${MODULES_OUTPUT_KSRC_DIR}"
1074
1075 # Build modules against kernel headers
1076 build_modules "${LINUX_HDROBJ_DIR}" "${MODULES_OUTPUT_KHDR_DIR}"
1077
1078 # Make sure some modules were actually built
1079 tree "${MODULES_OUTPUT_KSRC_DIR}"
1080 if [ "x$(find "${MODULES_OUTPUT_KSRC_DIR}" -name '*.ko*' -printf yes -quit)" != "xyes" ]; then
1081   echo "No modules built!"
1082   exit 1
1083 fi
1084
1085 tree "${MODULES_OUTPUT_KHDR_DIR}"
1086 if [ "x$(find "${MODULES_OUTPUT_KHDR_DIR}" -name '*.ko*' -printf yes -quit)" != "xyes" ]; then
1087   echo "No modules built!"
1088   exit 1
1089 fi
1090
1091 # EOF