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}" "4.20.17"; } ) || \
 391        ( { vergte "${kversion}" "5.0"; } && { verlt "${kversion}" "5.0.12"; } ) ; then
 392         # Old kernels can fail to build while on newer host kernels with errors
 393         # such as:
 394         #   In file included from scripts/selinux/genheaders/genheaders.c:19:
 395         #   ./security/selinux/include/classmap.h:249:2: error: #error New address family defined, please update secclass_map.
 396         # @see https://gitlab.com/linux-kernel/stable/-/commit/dfbd199a7cfe3e3cd8531e1353cdbd7175bfbc5e
 397         #
 398         patch_linux_kernel dfbd199a7cfe3e3cd8531e1353cdbd7175bfbc5e
 399     fi
 400
 401     if { vergte "${kversion}" "3.18"; } && { verlt "${kversion}" "4.16"; } ; then
 402         # Compatibility with binutils >= ~ 2.31
 403         patch_linux_kernel b21ebf2fb4cde1618915a97cc773e287ff49173e
 404     fi
 405
 406     # The above patch only partially applies linux 3.17, and has been, so a
 407     # rebased version is used instead.
 408     if { vergte "${kversion}" "3.17"; } && { verlt "${kversion}" "3.18"; } ; then
 409         cat <<'EOF' | patch -p1
 410 diff --git a/arch/x86/kernel/machine_kexec_64.c b/arch/x86/kernel/machine_kexec_64.c
 411 index 48598105..0652c5b6 100644
 412 --- a/arch/x86/kernel/machine_kexec_64.c
 413 +++ b/arch/x86/kernel/machine_kexec_64.c
 414 @@ -516,6 +516,7 @@ int arch_kexec_apply_relocations_add(const Elf64_Ehdr *ehdr,
 415                                 goto overflow;
 416                         break;
 417                 case R_X86_64_PC32:
 418 +               case R_X86_64_PLT32:
 419                         value -= (u64)address;
 420                         *(u32 *)location = value;
 421                         break;
 422 diff --git a/arch/x86/kernel/module.c b/arch/x86/kernel/module.c
 423 index e69f9882..7c6bc9fe 100644
 424 --- a/arch/x86/kernel/module.c
 425 +++ b/arch/x86/kernel/module.c
 426 @@ -180,6 +180,7 @@ int apply_relocate_add(Elf64_Shdr *sechdrs,
 427                                 goto overflow;
 428                         break;
 429                 case R_X86_64_PC32:
 430 +               case R_X86_64_PLT32:
 431                         val -= (u64)loc;
 432                         *(u32 *)loc = val;
 433  #if 0
 434 diff --git a/arch/x86/tools/relocs.c b/arch/x86/tools/relocs.c
 435 index bbb1d225..8deeacbc 100644
 436 --- a/arch/x86/tools/relocs.c
 437 +++ b/arch/x86/tools/relocs.c
 438 @@ -763,6 +763,7 @@ static int do_reloc64(struct section *sec, Elf_Rel *rel, ElfW(Sym) *sym,
 439         switch (r_type) {
 440         case R_X86_64_NONE:
 441         case R_X86_64_PC32:
 442 +       case R_X86_64_PLT32:
 443                 /*
 444                  * NONE can be ignored and PC relative relocations don't
 445                  * need to be adjusted.
 446 EOF
 447     fi
 448
 449     if ( { vergte "${kversion}" "3.14"; } && { verlt "${kversion}" "4.4"; } ) ||
 450        ( { vergte "${kversion}" "4.8"; } && { verlt "${kversion}" "4.18"; } ); then
 451         # While the original motivation of this patch is for fixing builds using
 452         # clang, the same error occurs between linux >= 3.14 and < 4.4, and in
 453         # 4.15, 4.16.
 454         # For rt-linux, the error has been observed in 4.8, 4.11, and 4.13.
 455         #
 456         # This patch only partially applies due to changes in kernel/Makefile,
 457         # so a supplementary patch is needed
 458         #
 459         # Without this patch, builds fail with
 460         #   Cannot find symbol for section 2: .text.
 461         #   kernel/elfcore.o: failed
 462         #
 463         # @see https://github.com/linuxppc/issues/issues/388
 464         # @see https://lore.kernel.org/lkml/20201204165742.3815221-2-arnd@kernel.org/
 465         #
 466         patch_linux_kernel 6e7b64b9dd6d96537d816ea07ec26b7dedd397b9
 467         if grep -q elfcore.o kernel/Makefile ; then
 468             sed -i '/^.* += elfcore.o$/d' kernel/Makefile
 469         fi
 470     fi
 471     # Same as above for the v4.4 branch
 472     if ( { vergte "${kversion}" "4.4"; } && { verlt "${kversion}" "4.4.257"; } ); then
 473         patch_linux_kernel 3140b0740b31cc63cf2ee08bc3f746b423eb068d
 474         if grep -q elfcore.o kernel/Makefile ; then
 475             sed -i '/^.* += elfcore.o$/d' kernel/Makefile
 476         fi
 477     fi
 478
 479     if { vergte "${kversion}" "4.5"; } && { verlt "${kversion}" "4.8"; } ; then
 480         # Kernels between v4.5 and v4.8 built with gcc >= 8 on arm will hit an
 481         # assembler error :
 482         #
 483         #  kernel/.tmp_fork.s: Assembler messages:
 484         #  kernel/.tmp_fork.s:1790: Error: .err encountered
 485         #
 486         # @see https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85745
 487         #
 488         patch_linux_kernel 9f73bd8bb445e0cbe4bcef6d4cfc788f1e184007
 489     fi
 490
 491     if ( { vergte "${kversion}" "4.4"; } && { verlt "${kversion}" "4.4.136"; } ) ||
 492        ( { vergte "${kversion}" "4.5"; } && { verlt "${kversion}" "4.8"; } ); then
 493         # Hacky patch to deal with the following build error:
 494         #   Cannot find symbol for section 7: .text.unlikely.
 495         #   kernel/kexec_file.o: failed
 496         #   make[1]: *** [scripts/Makefile.build:291: kernel/kexec_file.o] Error 1
 497         #
 498         # This error happens with binutils 2.36 and 2.37, but should probably not
 499         # be an issue with binutils 2.38.
 500         # @see https://github.com/linuxppc/issues/issues/388
 501         # @see https://github.com/bminor/binutils-gdb/commit/c09c8b42021180eee9495bd50d8b35e683d3901b
 502         #
 503         # There is some sort of config (unspecified in past discussions) which
 504         # provokes the error, and there was never a potential fix merged in
 505         # this discussion, in part because the build systems of the kernel
 506         # switched to objtool instead.
 507         #
 508         # @see https://lore.kernel.org/all/20210215162209.5e2a475b@gandalf.local.home/
 509         #
 510         sed -i 's/return txtname;/return shdr0->sh_size ? txtname : NULL;/' scripts/recordmcount.h
 511
 512         # After applying the above patch, the build continues but fails with
 513         # head64.c:(.text.exit+0x5): undefined reference to `__gcov_exit'
 514         #
 515         scripts/config --disable CONFIG_GCOV_KERNEL
 516     fi
 517
 518     if { vergte "${kversion}" "4.5"; } && { verlt "${kversion}" "4.5.5"; } ; then
 519         # drivers/staging/wilc1000/wilc_spi.c:123:34: error: storage size of ‘wilc1000_spi_ops’ isn’t known
 520         patch_linux_kernel ce7b516f3f9e11fe4ee06fad0d7e853bb6e8f160
 521     fi
 522
 523     # Newer binutils don't accept 3 operand 'cmp' instructions on ppc64
 524     # Convert them to 'cmpw' which was previously done silently
 525     if verlt "$kversion" "4.9"; then
 526             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/"
 527             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/"
 528             sed -i "s/\$pie \-o \"\$ofile\"/\$pie --no-dynamic-linker -o \"\$ofile\"/" arch/powerpc/boot/wrapper
 529     fi
 530
 531     if [ "$(scripts/config --state CONFIG_EXTCON_ADC_JACK)" != "n" ] &&
 532            ( { vergte "${kversion}" "4.2"; } && { verlt "${kversion}" "4.12"; } ); then
 533         # 73b6ecdb93e8e77752cae9077c424fcdc6f23c39 introduced a change where
 534         # extcon-adc-jack.h has an incompatible pointer type.
 535         # In GCC >= 5 this will provoke a warning and build failure.
 536         # Eg.
 537         #   drivers/extcon/extcon-adc-jack.c: In function ‘adc_jack_probe’:
 538         #   drivers/extcon/extcon-adc-jack.c:111:64: error: passing argument 2 of ‘devm_extcon_dev_allocate’ from incompatible pointer type [-Werror=incompatible-pointer-types]
 539         #   make[2]: *** [scripts/Makefile.build:295: drivers/extcon/extcon-adc-jack.o] Error 1
 540         #
 541         # 8a522bf2d4f788306443d36b26b54f0aedcdfdbe (in 4.11) has a fix for this warning
 542         #
 543         patch_linux_kernel 8a522bf2d4f788306443d36b26b54f0aedcdfdbe
 544     fi
 545
 546     # Fix a typo in v2.6.36.x
 547     if [ -f "arch/x86/kernel/entry_64.S" ]; then
 548       sed -i 's/END(do_hypervisor_callback)/END(xen_do_hypervisor_callback)/' arch/x86/kernel/entry_64.S
 549     fi
 550
 551     # Fix compiler switch in vdso Makefile for 2.6.36 to 2.6.36.2
 552     if { vergte "$kversion" "2.6.36" && verlte "$kversion" "2.6.36.3"; }; then
 553       sed -i 's/-m elf_x86_64/-m64/' arch/x86/vdso/Makefile
 554       sed -i 's/-m elf_i386/-m32/' arch/x86/vdso/Makefile
 555     fi
 556
 557     # Fix kernel < 3.0 with gcc >= 4.7
 558     if verlt "$kversion" "3.0"; then
 559       sed -i '/linux\/compiler.h/a #include <linux\/linkage.h> \/* For asmregparm *\/' arch/x86/include/asm/ptrace.h
 560       sed -i 's/extern long syscall_trace_enter/extern asmregparm long syscall_trace_enter/' arch/x86/include/asm/ptrace.h
 561       sed -i 's/extern void syscall_trace_leave/extern asmregparm void syscall_trace_leave/' arch/x86/include/asm/ptrace.h
 562       echo "header-y += linkage.h" >> include/linux/Kbuild
 563     fi
 564
 565     if [ "${cross_arch}" = "powerpc" ] ; then
 566         if { vergte "${kversion}" "4.15"; } && { verlt "${kversion}" "4.16"; } ; then
 567             # Avoid register errors such as
 568             # aes_generic.c:(.text+0x4e0): undefined reference to `_restgpr_31_x'
 569             # @see https://gitlab.com/linux-kernel/stable/-/commit/148b974deea927f5dbb6c468af2707b488bfa2de
 570             make_args+=(
 571                 CFLAGS_aes_generic.o=''
 572             )
 573         fi
 574     fi
 575
 576     if [ "$(scripts/config --state CONFIG_DEBUG_INFO_BTF)" == "y" ] &&
 577            { vergte "${pahole_version}" "1.24"; } &&
 578            { vergte "${kversion}" "5.10"; } && { verlt "${kversion}" "6.0"; } ;then
 579         # Some kernels Eg. Ubuntu-hwe-5.13-5.13.0-52.59_20.04.1
 580         # fail with the following error:
 581         #   BTFIDS  vmlinux
 582         #   FAILED: load BTF from vmlinux: Invalid argument
 583         #
 584         # When CONFIG_DEBUG_INFO_BTF is set, certain versions of pahole require
 585         # `--skip_encoding_btf_enum64` to be passed as the kernel doesn't define
 586         # BTF_KIND_ENUM64.
 587         #
 588         # Introduced in 341dfcf8d78eaa3a2dc96dea06f0392eb2978364 (~v5.10)
 589         # @see https://lore.kernel.org/bpf/20220825171620.cioobudss6ovyrkc@altlinux.org/t/
 590         #
 591         if [ -f "scripts/pahole-flags.sh" ] ; then
 592             sed -i 's/ -J ${PAHOLE_FLAGS} / -J ${PAHOLE_FLAGS} --skip_encoding_btf_enum64 /' scripts/link-vmlinux.sh
 593         else
 594             sed -i 's/ -J ${extra_paholeopt} / -J ${extra_paholeopt} --skip_encoding_btf_enum64 /' scripts/link-vmlinux.sh
 595         fi
 596     fi
 597
 598     # GCC 4.8
 599     if [ "$HOSTCC" == "gcc-4.8" ]; then
 600         scripts/config --disable CONFIG_CC_STACKPROTECTOR_STRONG
 601         scripts/config --disable CONFIG_PPC_OF_BOOT_TRAMPOLINE
 602     fi
 603
 604     # Don't try to sign modules
 605     scripts/config --disable CONFIG_MODULE_SIG
 606
 607     # Disable kernel stack frame correctness validation, introduced in 4.6.0 and currently fails
 608     scripts/config --disable CONFIG_STACK_VALIDATION
 609
 610     # Cause problems with inline assembly on i386
 611     scripts/config --disable CONFIG_DEBUG_SECTION_MISMATCH
 612
 613     # Don't build samples, they are broken on some kernel releases
 614     scripts/config --disable CONFIG_SAMPLES
 615     scripts/config --disable CONFIG_BUILD_DOCSRC
 616
 617     # Disable kcov
 618     scripts/config --disable CONFIG_KCOV
 619
 620     # Broken on some RT kernels
 621     scripts/config --disable CONFIG_HYPERV
 622
 623     # Broken drivers
 624     scripts/config --disable CONFIG_RAPIDIO_TSI721
 625     scripts/config --disable CONFIG_SGI_XP
 626     scripts/config --disable CONFIG_MFD_WM8994
 627     scripts/config --disable CONFIG_DRM_RADEON
 628     scripts/config --disable CONFIG_SND_SOC_WM5100
 629     # More recent compiler optimizations (from gcc 8 onwards )expose build errors
 630     # with netronome on older kernels.
 631     # Observed in 4.11-rt, 4.15-4.17, 5.0-rt - 5.16-rt
 632     # It seems easier to disable the driver than to attempt patching.
 633     # Eg.
 634     #   In function ‘ur_load_imm_any’,
 635     #   inlined from ‘jeq_imm’ at drivers/net/ethernet/netronome/nfp/bpf/jit.c:3146:13:
 636     #   ./include/linux/compiler.h:350:45: error: call to ‘__compiletime_assert_1062’ declared with attribute error: FIELD_FIT: value too large for the field
 637     #   350 |         _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
 638     #
 639     scripts/config --disable CONFIG_NET_VENDOR_NETRONOME
 640     # Eg.
 641     #  In function ‘memcpy’,
 642     #  inlined from ‘kszphy_get_strings’ at drivers/net/phy/micrel.c:664:3:
 643     #  ./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
 644     #  305 |                         __read_overflow2();
 645     #      |                         ^~~~~~~~~~~~~~~~~~
 646     #  make[3]: *** [scripts/Makefile.build:308: drivers/net/phy/micrel.o] Error 1
 647     #
 648     scripts/config --disable CONFIG_MICREL_PHY
 649
 650
 651     # IGBVF won't build with recent gcc on 2.6.38.x
 652     if { vergte "$kversion" "2.6.37" && verlt "$kversion" "2.6.38"; }; then
 653       scripts/config --disable CONFIG_IGBVF
 654     fi
 655
 656     # Don't fail the build on warnings
 657     scripts/config --disable CONFIG_WERROR
 658     scripts/config --enable CONFIG_PPC_DISABLE_WERROR
 659
 660     # Set required options
 661     scripts/config --enable CONFIG_TRACEPOINTS
 662     scripts/config --enable CONFIG_KALLSYMS
 663     scripts/config --enable CONFIG_HIGH_RES_TIMERS
 664     scripts/config --enable CONFIG_KPROBES
 665     scripts/config --enable CONFIG_FTRACE
 666     scripts/config --enable CONFIG_BLK_DEV_IO_TRACE
 667     scripts/config --enable CONFIG_KALLSYMS_ALL
 668     scripts/config --enable CONFIG_HAVE_SYSCALL_TRACEPOINTS
 669     scripts/config --enable CONFIG_PERF_EVENTS
 670     scripts/config --enable CONFIG_EVENT_TRACING
 671     scripts/config --enable CONFIG_KRETPROBES
 672
 673     if [ -n "${DEBUG}" ] ; then
 674         cat .config
 675     fi
 676
 677     make "$update_conf_target" "${make_args[@]}"
 678     make -j"$NPROC" "${make_args[@]}"
 679
 680     krelease=$(make -s kernelrelease "${make_args[@]}")
 681
 682     # Save the kernel and modules
 683     mkdir -p "$LINUX_INSTOBJ_DIR/boot"
 684     make INSTALL_MOD_PATH="$LINUX_INSTOBJ_DIR" INSTALL_MOD_STRIP=1 modules_install "${make_args[@]}"
 685     make INSTALL_MOD_PATH="$LINUX_INSTOBJ_DIR" INSTALL_PATH="$LINUX_INSTOBJ_DIR/boot" install "${make_args[@]}"
 686     rm -f "$LINUX_INSTOBJ_DIR/lib/modules/${krelease}/source" "$LINUX_INSTOBJ_DIR/lib/modules/${krelease}/build"
 687     ln -s ../../../../sources "$LINUX_INSTOBJ_DIR/lib/modules/${krelease}/source"
 688     ln -s ../../../../sources "$LINUX_INSTOBJ_DIR/lib/modules/${krelease}/source"
 689 }
 690
 691
 692 extract_distro_headers() {
 693
 694     # Enter linux source dir
 695     cd "${LINUX_SRCOBJ_DIR}"
 696
 697
 698     # For RT kernels, copy version file
 699     if [ -s localversion-rt ]; then
 700         cp -a localversion-rt "${LINUX_HDROBJ_DIR}"
 701     fi
 702
 703     # Copy all Makefile related stuff
 704     find . -path './include/*' -prune \
 705         -o -path './scripts/*' -prune -o -type f \
 706         \( -name 'Makefile*' -o -name 'Kconfig*' -o -name 'Kbuild*' -o \
 707             -name '*.sh' -o -name '*.pl' -o -name '*.lds' \) \
 708         -print | cpio -pd --preserve-modification-time "${LINUX_HDROBJ_DIR}"
 709
 710     # Copy base scripts and include dirs
 711     cp -a scripts include "${LINUX_HDROBJ_DIR}"
 712
 713     # Copy arch includes
 714     (find arch -name include -type d -print0 | \
 715         xargs -0 -n1 -I '{}' find '{}' -type f) | \
 716         cpio -pd --preserve-modification-time "${LINUX_HDROBJ_DIR}"
 717
 718     # Copy arch scripts
 719     (find arch -name scripts -type d -print0 | \
 720         xargs -0 -n1 -I '{}' find '{}' -type f) | \
 721         cpio -pd --preserve-modification-time "${LINUX_HDROBJ_DIR}"
 722
 723     # Cleanup scripts
 724     rm -f "${LINUX_HDROBJ_DIR}/scripts/*.o"
 725     rm -f "${LINUX_HDROBJ_DIR}/scripts/*/*.o"
 726
 727     # On powerpc 32bits this object is required to link modules
 728     if [ "${karch}" = "powerpc" ]; then
 729         if [ "$(scripts/config -s CONFIG_PPC64)" = "y" ] && vergte "${kversion}" "5.4"; then
 730             :
 731         else
 732             cp -a --parents arch/powerpc/lib/crtsavres.[So] "${LINUX_HDROBJ_DIR}/"
 733         fi
 734     fi
 735
 736     # On arm64 between 4.13 and 1.15 this object is required to build with ftrace support
 737     if [ "${karch}" = "arm64" ]; then
 738         if [ -f "arch/arm64/kernel/ftrace-mod.S" ]; then
 739             cp -a --parents arch/arm64/kernel/ftrace-mod.[So] "${LINUX_HDROBJ_DIR}/"
 740         fi
 741     fi
 742
 743     # Newer kernels need objtool to build modules when CONFIG_STACK_VALIDATION=y
 744     if [ -f tools/objtool/objtool ]; then
 745       cp -a --parents tools/objtool/objtool "${LINUX_HDROBJ_DIR}/"
 746     fi
 747
 748     if [ -f "arch/x86/kernel/macros.s" ]; then
 749       cp -a --parents arch/x86/kernel/macros.s "${LINUX_HDROBJ_DIR}/"
 750     fi
 751
 752     # Copy modules related stuff, if available
 753     if [ -s Module.symvers ]; then
 754         cp Module.symvers "${LINUX_HDROBJ_DIR}"
 755     fi
 756
 757     if [ -s System.map ]; then
 758         cp System.map "${LINUX_HDROBJ_DIR}"
 759     fi
 760
 761     if [ -s Module.markers ]; then
 762         cp Module.markers "${LINUX_HDROBJ_DIR}"
 763     fi
 764
 765     # Copy config file
 766     cp .config "${LINUX_HDROBJ_DIR}"
 767
 768     # Make sure the Makefile and version.h have a matching timestamp so that
 769     # external modules can be built
 770     if [ -s "${LINUX_HDROBJ_DIR}/include/generated/uapi/linux/version.h" ]; then
 771         touch -r "${LINUX_HDROBJ_DIR}/Makefile" "${LINUX_HDROBJ_DIR}/include/generated/uapi/linux/version.h"
 772     elif [ -s "${LINUX_HDROBJ_DIR}/include/linux/version.h" ]; then
 773         touch -r "${LINUX_HDROBJ_DIR}/Makefile" "${LINUX_HDROBJ_DIR}/include/linux/version.h"
 774     else
 775         echo "Missing version.h"
 776         exit 1
 777     fi
 778     touch -r "${LINUX_HDROBJ_DIR}/.config" "${LINUX_HDROBJ_DIR}/include/generated/autoconf.h"
 779
 780     # Copy .config to include/config/auto.conf so "make prepare" is unnecessary.
 781     if [ ! -f "${LINUX_HDROBJ_DIR}/include/config/auto.conf" ]; then
 782         cp "${LINUX_HDROBJ_DIR}/.config" "${LINUX_HDROBJ_DIR}/include/config/auto.conf"
 783     fi
 784
 785     # Finally clean the object files from the full source tree
 786     make clean
 787
 788     # And regen the modules support files
 789     make modules_prepare "${make_args[@]}"
 790
 791     # On powerpc 32bits this object is required to link modules
 792     if [ "${karch}" = "powerpc" ]; then
 793         if [ "$(scripts/config -s CONFIG_PPC64)" = "y" ] && vergte "${kversion}" "5.4"; then
 794             :
 795         else
 796             make arch/powerpc/lib/crtsavres.o "${make_args[@]}"
 797         fi
 798     fi
 799
 800     # On arm64 between 4.13 and 4.15 this object is required to build with ftrace support
 801     if [ "${karch}" = "arm64" ]; then
 802         if [ -f "arch/arm64/kernel/ftrace-mod.S" ]; then
 803             make arch/arm64/kernel/ftrace-mod.o "${make_args[@]}"
 804         fi
 805     fi
 806
 807     # Version specific tasks
 808     case "$ktag" in
 809       Ubuntu*)
 810         # Add Ubuntu ABI number to kernel headers, this is normally done by the packaging code
 811         ABINUM="$(echo "$ktag" | grep -P -o 'Ubuntu-(lts-)?.*-\K\d+(?=\..*)')"
 812         echo "#define UTS_UBUNTU_RELEASE_ABI $ABINUM" >> include/generated/utsrelease.h
 813         echo "#define UTS_UBUNTU_RELEASE_ABI $ABINUM" >> "${LINUX_HDROBJ_DIR}/include/generated/utsrelease.h"
 814         ;;
 815     esac
 816 }
 817
 818
 819 build_modules() {
 820
 821     local kdir="$1"
 822     local outdir="$2"
 823     local kversion
 824
 825     kversion=$(make -C "$LINUX_HDROBJ_DIR" -s kernelversion)
 826
 827     # Try to catch some compatibility problems by turning some
 828     # warnings into errors.
 829     #export KCFLAGS="$KCFLAGS -Wall -Werror"
 830
 831     # Enter lttng-modules source dir
 832     cd "${MODULES_GIT_DIR}"
 833
 834     # kernels 3.10 to 3.10.13 and 3.11 to 3.11.2 introduce a deadlock in the
 835     # timekeeping subsystem. We want those build to fail.
 836     if { vergte "$kversion" "3.10" && verlte "$kversion" "3.10.13"; } || \
 837        { vergte "$kversion" "3.11" && verlte "$kversion" "3.11.2"; }; then
 838
 839         set +e
 840
 841         # Build modules
 842         KERNELDIR="${kdir}" make -j"${NPROC}" V=1 "${make_args[@]}"
 843         ret=$?
 844
 845         set -e
 846
 847         # We expect this build to fail, if it doesn't, fail the job.
 848         if [ "$ret" -eq 0 ]; then
 849             echo "This build should have failed."
 850             exit 1
 851         fi
 852
 853         # We have to publish at least one file or the build will fail
 854         echo "This kernel is broken, there is a deadlock in the timekeeping subsystem." > "${outdir}/BROKEN.txt.ko"
 855
 856         KERNELDIR="${kdir}" make clean
 857
 858     else # Regular build
 859
 860         # Build modules against full kernel sources
 861         KERNELDIR="${kdir}" make -j"${NPROC}" V=1 "${make_args[@]}"
 862
 863         # Install modules to build dir
 864         KERNELDIR="${kdir}" make INSTALL_MOD_PATH="${outdir}" modules_install
 865
 866         # Clean build dir
 867         KERNELDIR="${kdir}" make clean
 868     fi
 869 }
 870
 871
 872 ## MAIN ##
 873
 874 # Use all CPU cores
 875 NPROC=$(nproc)
 876
 877 MODULES_GIT_DIR="${WORKSPACE}/src/lttng-modules"
 878 LINUX_GIT_DIR="${WORKSPACE}/src/linux"
 879
 880 LINUX_OBJ_DIR="${WORKSPACE}/linux"
 881 LINUX_SRCOBJ_DIR="${LINUX_OBJ_DIR}/sources"
 882 LINUX_HDROBJ_DIR="${LINUX_OBJ_DIR}/headers"
 883 LINUX_INSTOBJ_DIR="${LINUX_OBJ_DIR}/install"
 884
 885 MODULES_OUTPUT_KSRC_DIR="${WORKSPACE}/build/lttng-modules-ksrc"
 886 MODULES_OUTPUT_KHDR_DIR="${WORKSPACE}/build/lttng-modules-khdr"
 887
 888 LINUX_GIT_REF_REPO_DIR="$HOME/gitcache/linux-stable.git/"
 889
 890 OBJ_STORE_URL="s3://jenkins"
 891
 892 cd "$WORKSPACE"
 893
 894 # Create build directories
 895 mkdir -p "${LINUX_SRCOBJ_DIR}" "${LINUX_HDROBJ_DIR}" "${LINUX_INSTOBJ_DIR}" "${MODULES_OUTPUT_KSRC_DIR}" "${MODULES_OUTPUT_KHDR_DIR}"
 896
 897 git_clone_modules_sources
 898
 899 # Setup cross compile env if available
 900 if [ "x${cross_arch}" != "x" ]; then
 901
 902     case "$cross_arch" in
 903         "armhf")
 904             karch="arm"
 905             cross_compile="arm-linux-gnueabihf-"
 906             vanilla_config="imx_v6_v7_defconfig"
 907             ubuntu_config="armhf-config.flavour.generic"
 908             ;;
 909
 910         "arm64")
 911             karch="arm64"
 912             cross_compile="aarch64-linux-gnu-"
 913             vanilla_config="defconfig"
 914             ubuntu_config="arm64-config.flavour.generic"
 915             ;;
 916
 917         "powerpc")
 918             karch="powerpc"
 919             cross_compile="powerpc-linux-gnu-"
 920             vanilla_config="ppc44x_defconfig"
 921             ubuntu_config="powerpc-config.flavour.powerpc-smp"
 922             ;;
 923
 924         "ppc64el")
 925             karch="powerpc"
 926             cross_compile="powerpc64le-linux-gnu-"
 927             vanilla_config="pseries_le_defconfig"
 928             ubuntu_config="ppc64el-config.flavour.generic"
 929             ;;
 930
 931         *)
 932             echo "Unsupported cross arch $cross_arch"
 933             exit 1
 934             ;;
 935     esac
 936
 937     # Export variables used by Kbuild for cross compilation
 938     export ARCH="${karch}"
 939     export CROSS_COMPILE="${cross_compile}"
 940
 941 # Set arch specific values if we are not cross compiling
 942 elif [ "x${arch}" != "x" ]; then
 943
 944     case "$arch" in
 945         "i386")
 946             karch="x86"
 947             vanilla_config="allmodconfig"
 948             ubuntu_config="i386-config.flavour.generic"
 949             ;;
 950
 951         "amd64")
 952             karch="x86"
 953             vanilla_config="allmodconfig"
 954             ubuntu_config="amd64-config.flavour.generic"
 955             ;;
 956
 957         "armhf")
 958             karch="arm"
 959             vanilla_config="allmodconfig"
 960             ubuntu_config="armhf-config.flavour.generic"
 961             ;;
 962
 963         "arm64")
 964             karch="arm64"
 965             vanilla_config="allmodconfig"
 966             ubuntu_config="arm64-config.flavour.generic"
 967             ;;
 968
 969         "powerpc")
 970             karch="powerpc"
 971             vanilla_config="allmodconfig"
 972             ubuntu_config="powerpc-config.flavour.powerpc-smp"
 973             ;;
 974
 975         "ppc64el")
 976             karch="powerpc"
 977             vanilla_config="allmodconfig"
 978             ubuntu_config="ppc64el-config.flavour.generic"
 979             ;;
 980
 981         *)
 982             echo "Unsupported arch $arch"
 983             exit 1
 984             ;;
 985     esac
 986 else
 987     echo "No arch or cross_arch specified"
 988     exit 1
 989 fi
 990
 991
 992
 993 # First get the kernel build from the object store, or build it, if it's
 994 # not available.
 995
 996 echo "# Setup endpoint
 997 host_base = obj.internal.efficios.com
 998 host_bucket = obj.internal.efficios.com
 999 bucket_location = us-east-1
1000 use_https = True
1001
1002 # Setup access keys
1003 access_key = jenkins
1004 secret_key = echo123456
1005
1006 # Enable S3 v4 signature APIs
1007 signature_v2 = False" > "$WORKSPACE/.s3cfg"
1008
1009 url_hash="$(echo -n "$kgitrepo" | md5sum | awk '{ print $1 }')"
1010 obj_name="linux.tar.bz2"
1011
1012 if [ -z "${cross_arch}" ]; then
1013         obj_url_prefix="$OBJ_STORE_URL/linux-build/$url_hash/$ktag/platform-${platforms}/$arch/native"
1014 else
1015         obj_url_prefix="$OBJ_STORE_URL/linux-build/$url_hash/$ktag/platform-${platforms}/${cross_arch}"
1016 fi
1017
1018 obj_url="$obj_url_prefix/$obj_name"
1019
1020 set +e
1021 # In s3cmd 2.3, the return code of get when an object does not exist (64)
1022 # is different than in 2.2 (12). The return codes of 's3cmd info' are
1023 # consistent between 2.2 and 2.3.
1024 s3cmd -c "$WORKSPACE/.s3cfg" info "$obj_url"
1025 ret=$?
1026 set -e
1027
1028 case "$ret" in
1029     "0")
1030       s3cmd -c "$WORKSPACE/.s3cfg" get "$obj_url"
1031       extract_archive_obj
1032       ;;
1033
1034     "12")
1035       echo "File not found"
1036
1037       # Build all the things and upload
1038       # then finish the module build...
1039
1040       git_clone_linux_sources
1041       git_export_linux_sources
1042
1043       select_compiler
1044
1045       ## PREPARE FULL LINUX SOURCE TREE
1046       build_linux_kernel
1047
1048       ## EXTRACT DISTRO STYLE KERNEL HEADERS / DEVEL
1049       extract_distro_headers
1050
1051       tar_archive_obj
1052
1053       upload_archive_obj
1054
1055       ;;
1056
1057     *)
1058       echo "Unknown error? Abort"
1059       exit 1
1060       ;;
1061 esac
1062
1063 select_compiler
1064
1065 selected_cc_version="$(echo "${selected_cc}" | cut -d'-' -f2)"
1066 # lttng-modules requires gcc >= 5.1 for aarch64
1067 # @see https://github.com/lttng/lttng-modules/commit/be06402dbdbea2f3394e60ec15c5d3356e2be416
1068 if { verlt "${selected_cc_version}" "5.1"; } && [ "${cross_arch}" = "arm64" ] ; then
1069     echo "Building lltng-modules on aarch64 requires gcc >= 5.1"
1070     exit 0
1071 fi
1072
1073 ## BUILD modules
1074 # Either we downloaded a pre-build kernel or we built it and uploaded
1075 # the archive for future builds.
1076
1077 cd "$WORKSPACE"
1078
1079 # Build modules against full kernel sources
1080 build_modules "${LINUX_SRCOBJ_DIR}" "${MODULES_OUTPUT_KSRC_DIR}"
1081
1082 # Build modules against kernel headers
1083 build_modules "${LINUX_HDROBJ_DIR}" "${MODULES_OUTPUT_KHDR_DIR}"
1084
1085 # Make sure some modules were actually built
1086 tree "${MODULES_OUTPUT_KSRC_DIR}"
1087 if [ "x$(find "${MODULES_OUTPUT_KSRC_DIR}" -name '*.ko*' -printf yes -quit)" != "xyes" ]; then
1088   echo "No modules built!"
1089   exit 1
1090 fi
1091
1092 tree "${MODULES_OUTPUT_KHDR_DIR}"
1093 if [ "x$(find "${MODULES_OUTPUT_KHDR_DIR}" -name '*.ko*' -printf yes -quit)" != "xyes" ]; then
1094   echo "No modules built!"
1095   exit 1
1096 fi
1097
1098 # EOF