scripts/lttng-modules/param-build.sh

   1 #!/bin/bash
   2 #
   3 # Copyright (C) 2016-2023 Michael Jeanson <mjeanson@efficios.com>
   4 #
   5 # This program is free software: you can redistribute it and/or modify
   6 # it under the terms of the GNU General Public License as published by
   7 # the Free Software Foundation, either version 3 of the License, or
   8 # (at your option) any later version.
   9 #
  10 # This program is distributed in the hope that it will be useful,
  11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 # GNU General Public License for more details.
  14 #
  15 # You should have received a copy of the GNU General Public License
  16 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17
  18 set -exu
  19
  20 # Parameters
  21 platform=${platforms:-}
  22 cross_arch=${cross_arch:-}
  23 ktag=${ktag:-}
  24 kgitrepo=${kgitrepo:-}
  25 mversion=${mversion:-}
  26 mgitrepo=${mgitrepo:-}
  27 make_args=()
  28
  29 DEBUG=${DEBUG:-}
  30
  31 # Derive arch from label if it isn't set
  32 if [ -z "${arch:-}" ] ; then
  33     # Labels may be platform specific, eg. jammy-amd64, deb12-armhf
  34     regex='[[:alnum:]]+-([[:alnum:]]+)'
  35     if [[ "${platform}" =~ ${regex} ]] ; then
  36         arch="${BASH_REMATCH[1]}"
  37     else
  38         arch="${platform:-}"
  39     fi
  40 fi
  41
  42
  43 ## FUNCTIONS ##
  44
  45 # Kernel version compare functions
  46 verlte() {
  47     [  "$1" = "$(printf '%s\n%s' "$1" "$2" | sort -V | head -n1)" ]
  48 }
  49
  50 verlt() {
  51     # shellcheck disable=SC2015
  52     [ "$1" = "$2" ] && return 1 || verlte "$1" "$2"
  53 }
  54
  55 vergte() {
  56     [  "$1" = "$(printf '%s\n%s' "$1" "$2" | sort -V | tail -n1)" ]
  57 }
  58
  59 vergt() {
  60     # shellcheck disable=SC2015
  61     [ "$1" = "$2" ] && return 1 || vergte "$1" "$2"
  62 }
  63
  64 print_header() {
  65     set +x
  66
  67     local message=" $1 "
  68     local message_len
  69     local padding_len
  70
  71     message_len="${#message}"
  72     padding_len=$(( (80 - (message_len)) / 2 ))
  73
  74     printf '\n'; printf -- '#%.0s' {1..80}; printf '\n'
  75     printf -- '-%.0s' {1..80}; printf '\n'
  76     printf -- '#%.0s' $(seq 1 $padding_len); printf '%s' "$message"; printf -- '#%.0s' $(seq 1 $padding_len); printf '\n'
  77     printf -- '-%.0s' {1..80}; printf '\n'
  78     printf -- '#%.0s' {1..80}; printf '\n\n'
  79
  80     set -x
  81 }
  82
  83 git_clone_modules_sources() {
  84     mkdir -p "$MODULES_GIT_DIR"
  85
  86     # If the version starts with "refs/", checkout the specific git ref, otherwise treat it
  87     # as a branch name.
  88     if [ "${mversion:0:5}" = "refs/" ]; then
  89         git clone --no-tags --depth=1 "${mgitrepo}" "$MODULES_GIT_DIR"
  90         (cd "$MODULES_GIT_DIR" && git fetch origin "${mversion}" && git checkout FETCH_HEAD)
  91     else
  92         git clone --no-tags --depth=1 -b "${mversion}" "${mgitrepo}" "$MODULES_GIT_DIR"
  93     fi
  94 }
  95
  96 # Checkout a shallow kernel tree of the specified tag
  97 git_clone_linux_sources() {
  98     mkdir -p "$LINUX_GIT_DIR"
  99     git clone --depth=1 -b "${ktag}" --reference "$LINUX_GIT_REF_REPO_DIR" "${kgitrepo}" "$LINUX_GIT_DIR"
 100 }
 101
 102
 103 # Export the kernel sources from the git repo
 104 git_export_linux_sources() {
 105     cd "$LINUX_GIT_DIR"
 106     git archive "${ktag}" | tar -x -C "$LINUX_SRCOBJ_DIR"
 107 }
 108
 109
 110 # Upload the tar archive to the object store
 111 upload_archive_obj() {
 112     s3cmd -c "$WORKSPACE/.s3cfg" put "$WORKSPACE/$obj_name" "$obj_url_prefix/"
 113     rm -f "$WORKSPACE/$obj_name"
 114 }
 115
 116
 117 extract_archive_obj() {
 118     tar -xf "$WORKSPACE/$obj_name" -C "$LINUX_OBJ_DIR" -I pbzip2
 119     rm -f "$WORKSPACE/$obj_name"
 120 }
 121
 122
 123 tar_archive_obj() {
 124     cd "$LINUX_OBJ_DIR"
 125     tar -cf "$WORKSPACE/$obj_name" -I pbzip2 .
 126     cd -
 127 }
 128
 129 # List all GCC versions present in the PATH
 130 list_gccs() {
 131     local gccs
 132     gccs=()
 133     IFS=: read -r -a path_array <<< "$PATH"
 134     while read -r gcc ; do
 135         gccs+=("$gcc")
 136     done < <(find "${path_array[@]}" -maxdepth 1 -regex '.*/gcc-[0-9\.]+$' -printf '%f\n' | sort -t- -k2 -V -r)
 137     echo "${gccs[@]}"
 138 }
 139
 140 # Find the most recent GCC version supported by the kernel sources
 141 select_compiler() {
 142
 143     # Enter linux source dir
 144     cd "$LINUX_SRCOBJ_DIR"
 145
 146     kversion=$(make -s kernelversion)
 147
 148     if { verlt "$kversion" "4.4"; }; then
 149         # Force gcc-4.8 for kernels before 4.4
 150         selected_cc='gcc-4.8'
 151         selected_cc_version=$(echo "${selected_cc}" | cut -d'-' -f2)
 152     else
 153         for cc in $(list_gccs) ; do
 154             if "${CROSS_COMPILE:-}${cc}" -I include/ -D__LINUX_COMPILER_H -D__LINUX_COMPILER_TYPES_H -E include/linux/compiler-gcc.h; then
 155                 cc_version=$(echo "${cc}" | cut -d'-' -f2)
 156                 if { verlt "${kversion}" "5.17"; } && { vergt "${cc_version}" "11"; } ; then
 157                     # Using gcc-12+ with '-Wuse-after-free' breaks the build of older
 158                     # kernels (in particular, objtool). Some releases on LTS
 159                     # branches between 4.x and 5.15 can be built with gcc-12.
 160                     # @see https://lore.kernel.org/lkml/20494.1643237814@turing-police/
 161                     # @see https://gitlab.com/linux-kernel/stable/-/commit/52a9dab6d892763b2a8334a568bd4e2c1a6fde66
 162                     continue
 163                 fi
 164                 selected_cc="$cc"
 165                 selected_cc_version="$cc_version"
 166                 break
 167             fi
 168         done
 169     fi
 170
 171     if [ -z "$selected_cc" ]; then
 172       echo "Found no suitable compiler."
 173       exit 1
 174     fi
 175
 176     # lttng-modules requires gcc >= 5.1 for aarch64
 177     # @see https://github.com/lttng/lttng-modules/commit/be06402dbdbea2f3394e60ec15c5d3356e2be416
 178     if { verlt "${selected_cc_version}" "5.1"; } && [ "${cross_arch}" = "arm64" ] ; then
 179         echo "Building lttng-modules on aarch64 requires gcc >= 5.1"
 180         exit 1
 181     fi
 182
 183     cd -
 184 }
 185
 186 export_kbuild_flags() {
 187     local _KAFLAGS
 188     local _KCFLAGS
 189     local _KCPPFLAGS
 190     local _HOSTCFLAGS
 191
 192     _KAFLAGS=()
 193     _KCFLAGS=()
 194     _KCPPFLAGS=()
 195     _HOSTCFLAGS=()
 196
 197     if [ "$selected_cc" != "gcc-4.8" ]; then
 198         # Older kernel Makefiles do not expect the compiler to default to PIE
 199         _KAFLAGS+=(-fno-pie)
 200         _KCFLAGS+=(
 201             -fno-pie
 202             -no-pie
 203             -fno-stack-protector
 204         )
 205         _KCPPFLAGS+=(-fno-pie)
 206     fi
 207
 208     if { vergte "${selected_cc_version}" "10"; } && { verlt "${kversion}" "5.10"; } ; then
 209         # gcc-10 changed the default from '-fcommon' to '-fno-common', which
 210         # causes a linker failure. '-fcommon' can be set on the HOSTCFLAGS
 211         # to avoid the issue.
 212         # @see https://gitlab.com/linux-kernel/stable/-/commit/e33a814e772cdc36436c8c188d8c42d019fda639
 213         _HOSTCFLAGS+=(-fcommon)
 214     fi
 215
 216     if { verlt "${kversion}" "5.14"; } && [ "${cross_arch:-}" == "armhf" ] ; then
 217         # Work-around for producing instructions that aren't valid for the
 218         # default architectures.
 219         # Eg. Error: selected processor does not support `cpsid i' in ARM mode
 220         _KCFLAGS+=(-march=armv7-a -mfpu=vfpv3-d16)
 221         _KCPPFLAGS+=(-march=armv7-a -mfpu=vfpv3-d16)
 222     fi
 223
 224     if { vergt "${selected_cc_version}" "8"; } && { vergte "${kversion}" "4.15"; } && { verlt "${kversion}" "4.17"; } ; then
 225         # This was added to -Wall in gcc 9 but some kernels do not include the fixes
 226         # @see https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88583
 227         _KCFLAGS+=(-Wno-error=packed-not-aligned)
 228     fi
 229
 230     export KAFLAGS="${_KAFLAGS[*]}"
 231     export KCFLAGS="${_KCFLAGS[*]}"
 232     export KCPPFLAGS="${_KCPPFLAGS[*]}"
 233     export HOSTCFLAGS="${_HOSTCFLAGS[*]}"
 234     export CC="${CROSS_COMPILE:-}${selected_cc}"
 235     export HOSTCC="${selected_cc}"
 236
 237     make_args=(
 238         CC="${CC}"
 239         HOSTCC="${HOSTCC}"
 240         HOSTCFLAGS="${HOSTCFLAGS:-}"
 241     )
 242
 243     if [ -n "${DEBUG}" ] ; then
 244         make_args+=(
 245             V=1
 246         )
 247     fi
 248 }
 249
 250 patch_linux_kernel() {
 251     local commit_hash
 252     commit_hash="$1"
 253
 254     # Show the title of the patch in the build log
 255     git -C "${LINUX_GIT_REF_REPO_DIR}" show --oneline -s "${commit_hash}"
 256
 257     # Apply patch, don't fail if it doesn't apply cleanly
 258     set +e
 259     git -C "${LINUX_GIT_REF_REPO_DIR}" format-patch -n1 --stdout "${commit_hash}" | patch -p1
 260     set -e
 261
 262     if [ "$?" -gt 1 ] ; then
 263         echo "Serious issue patching"
 264         exit 1
 265     fi
 266 }
 267
 268 build_linux_kernel() {
 269     cd "$LINUX_SRCOBJ_DIR"
 270
 271     kversion=$(make -s kernelversion "${make_args[@]}")
 272     pahole_version="$(pahole --version | tr -d 'v')"
 273
 274     if { verlt "${kversion}" "3.3"; } && [ "${vanilla_config}" = "imx_v6_v7_defconfig" ] ; then
 275         # imx_v6_v7 didn't exist before 06965c39b4c63933fa0a1cde2237ef85477c5655
 276         if { verlt "${kversion}" "3.2"; } ; then
 277             vanilla_config='mx5_defconfig'
 278         else
 279             vanilla_config='mx51_defconfig'
 280         fi
 281     fi
 282
 283     if { verlt "${kversion}" "3.13"; } && [ "${vanilla_config}" = "pseries_le_defconfig" ] ; then
 284         # pseries_le_deconfig was introduced in f53e462e907cbaed29c49c0f10f5b8f614e1bf1d
 285         vanilla_config='pseries_defconfig'
 286     fi
 287
 288     # Generate kernel configuration
 289     case "$ktag" in
 290       Ubuntu*)
 291         if [ "${cross_arch}" = "powerpc" ]; then
 292           if vergte "${kversion}" "4.10"; then
 293             echo "Ubuntu removed big endian powerpc configuration from kernel >= 4.10. Don't try to build it."
 294             exit 0
 295           fi
 296         fi
 297
 298         fakeroot debian/rules clean KW_DEFCONFIG_DIR=.
 299
 300         # Hack for kernel Ubuntu-hwe-5.8
 301         # The debian/control file is produced by the clean target above, so this
 302         # check needs to happen afterwards.
 303         if [ ! -f "debian/compat" ] && ! grep -q debhelper-compat debian/control; then
 304             echo "10" > "debian/compat"
 305         fi
 306
 307         # genconfigs check can fail in certain cases, eg. when a more recent
 308         # compiler exposes kernel configuration flags which aren't set in the
 309         # Ubuntu annotations.
 310         # In any case, the configuration will be updated with any missing values
 311         # later in our build script.
 312         fakeroot debian/rules genconfigs KW_DEFCONFIG_DIR=. do_skip_checks=true
 313         cp CONFIGS/"${ubuntu_config}" .config
 314         ;;
 315
 316       *)
 317         # Force 32bit build on i386, default is 64bit
 318         if [ "$arch" = "i386" ]; then
 319             export ARCH="i386"
 320         fi
 321
 322         make "${vanilla_config}" "${make_args[@]}"
 323         ;;
 324     esac
 325
 326     if [ "${vanilla_config}" = "pseries_defconfig" ] && [ "${cross_arch}" = "ppc64el" ] ; then
 327         # @see diff <(git show v3.13:arch/powerpc/configs/pseries_defconfig) <(git show v3.13:arch/powerpc/configs/pseries_le_defconfig)
 328         scripts/config --enable CONFIG_CPU_LITTLE_ENDIAN
 329         scripts/config --enable CONFIG_CMA
 330         scripts/config --disable CONFIG_XMON_DEFAULT
 331         # scripts/config --disable CONFIG_VIRTUALIZATION
 332         # scripts/config --disable CONFIG_KVM_BOOK3S_64
 333         scripts/config --disable CONFIG_KVM_BOOK3S_64_HV
 334     fi
 335
 336     # oldnoconfig was renamed in 4.19
 337     if vergte "$kversion" "4.19"; then
 338         update_conf_target="olddefconfig"
 339     else
 340         update_conf_target="oldnoconfig"
 341     fi
 342
 343     # Fix 'defined(@array)' was removed from recent perl
 344     if [ -f "kernel/timeconst.pl" ]; then
 345       sed -i 's/defined(\@\(.*\))/@\1/' kernel/timeconst.pl
 346     fi
 347
 348     # Fix syntax of inline assembly which is confused with C++11 raw strings on gcc >= 5
 349     if [ "$HOSTCC" != "gcc-4.8" ]; then
 350       if [ -f "arch/x86/kvm/svm.c" ]; then
 351         sed -i 's/ R"/ R "/g; s/"R"/" R "/g' arch/x86/kvm/svm.c
 352       fi
 353
 354       if [ -f "arch/x86/kvm/vmx.c" ]; then
 355         sed -i 's/ R"/ R "/g; s/"R"/" R "/g' arch/x86/kvm/vmx.c
 356       fi
 357     fi
 358
 359     if { verlt "${kversion}" "5.11"; } && { vergte "${kversion}" "4.10"; } ; then
 360         # Binutils > 2.35 strips empty symbol tables, causing obltool to fail
 361         # in certain cases when files are empty.
 362         # @see https://gitlab.com/linux-kernel/stable/-/commit/1d489151e9f9d1647110277ff77282fe4d96d09b
 363         #
 364         # There doesn't seem to be any LD/AS/AR flags to control this behaviour,
 365         # therefore patching tools/objtool/elf.c is attempted.
 366         patch_linux_kernel 1d489151e9f9d1647110277ff77282fe4d96d09b
 367         if { verlt "${kversion}" "4.18"; } ; then
 368             patch_linux_kernel e81e0724432542af8d8c702c31e9d82f57b1ff31
 369         fi
 370     fi
 371
 372     if { vergt "${selected_cc_version}" "7"; } && { vergte "${kversion}" "4.14"; } && { verlt "${kversion}" "4.17"; } ; then
 373         # Builds fail due to -Werror=restrict in pager.o and str_error_r.o
 374         if { verlt "${kversion}" "4.16"; } ; then
 375             # This is patched since objtool's Makefile doesn't respect HOSTCFLAGS
 376             # @see https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ad343a98e74e85aa91d844310e797f96fee6983b
 377             patch_linux_kernel ad343a98e74e85aa91d844310e797f96fee6983b
 378         fi
 379         if { verlt "${kversion}" "4.17"; } ; then
 380             # This is patched since objtool's Makefile doesn't respect HOSTCFLAGS
 381             # @see https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=854e55ad289ef8888e7991f0ada85d5846f5afb9
 382             patch_linux_kernel 854e55ad289ef8888e7991f0ada85d5846f5afb9
 383         fi
 384
 385     fi
 386
 387     if { vergt "${selected_cc_version}" "9"; } && { verlt "${kversion}" "5.6"; } ; then
 388         # Duplicate decalarations of __force_order
 389         # @see https://gitlab.com/linux-kernel/stable/-/commit/df6d4f9db79c1a5d6f48b59db35ccd1e9ff9adfc
 390         # However, kaslr_64.c doesn't exit in 4.15, 4.16, it's named pagetable.c
 391         if [ -f arch/x86/boot/compressed/pagetable.c ] ; then
 392             sed -i '/^unsigned long __force_order;$/d' arch/x86/boot/compressed/pagetable.c
 393         fi
 394         if [ -f arch/x86/boot/compressed/kaslr_64.c ] ; then
 395             patch_linux_kernel df6d4f9db79c1a5d6f48b59db35ccd1e9ff9adfc
 396         fi
 397     fi
 398
 399     if { vergte "${kversion}" "4.18"; } && { verlt "${kversion}" "4.19"; } ; then
 400         # In some cases, compiling net/bpfilter can fail with the following error:
 401         #   net/bpfilter/main.c:9:10: fatal error: include/uapi/linux/bpf.h: No such file or directory
 402         #   make[2]: *** [scripts/Makefile.host:107: net/bpfilter/main.o] Error 1
 403         #
 404         # While the issue is potentially in a number of old versions, it has only
 405         # been observed in v4.18-rt
 406         #
 407         patch_linux_kernel 303a339f30a9441c4695d3d2cc78f1b33cd959ff
 408     fi
 409
 410     if { vergte "${kversion}" "4.18"; } && { verlt "${kversion}" "4.19"; } ; then
 411         # In some cases, compiling net/bpfilter can fail with the following error:
 412         #   net/bpfilter/main.c:9:10: fatal error: include/uapi/linux/bpf.h: No such file or directory
 413         #   make[2]: *** [scripts/Makefile.host:107: net/bpfilter/main.o] Error 1
 414         #
 415         # While the issue is potentially in a number of old versions, it has only
 416         # been observed in v4.18-rt
 417         #
 418         patch_linux_kernel 303a339f30a9441c4695d3d2cc78f1b33cd959ff
 419     fi
 420
 421     if { vergte "${kversion}" "4.15"; } && { verlt "${kversion}" "4.18"; } ; then
 422         # Some old kernels fail to build when make is too new
 423         # @see https://gitlab.com/linux-kernel/stable/-/commit/9feeb638cde083c737e295c0547f1b4f28e99583
 424         patch_linux_kernel 9564a8cf422d7b58f6e857e3546d346fa970191e
 425     fi
 426
 427     if { vergte "${kversion}" "4.14"; } && { verlt "${kversion}" "4.14.55"; } ; then
 428         # Some old kernels fail to build when make is too new
 429         # @see https://gitlab.com/linux-kernel/stable/-/commit/9feeb638cde083c737e295c0547f1b4f28e99583
 430         patch_linux_kernel e82885490a611f2b75a6c27cd7bb09665c1740be
 431     fi
 432
 433     if ( { vergte "${kversion}" "4.15"; } && { verlt "${kversion}" "4.18"; } ) || \
 434        ( { vergte "${kversion}" "4.14"; } && { verlt "${kversion}" "4.14.56"; } ) ; then
 435         # Some old kernels fail to build when make is too new
 436         # @see https://gitlab.com/linux-kernel/stable/-/commit/9feeb638cde083c737e295c0547f1b4f28e99583
 437         patch_linux_kernel 9feeb638cde083c737e295c0547f1b4f28e99583
 438     fi
 439
 440     if ( { vergte "${kversion}" "4.12"; } && { verlt "${kversion}" "4.20.17"; } ) || \
 441        ( { vergte "${kversion}" "5.0"; } && { verlt "${kversion}" "5.0.12"; } ) ; then
 442         # Old kernels can fail to build while on newer host kernels with errors
 443         # such as:
 444         #   In file included from scripts/selinux/genheaders/genheaders.c:19:
 445         #   ./security/selinux/include/classmap.h:249:2: error: #error New address family defined, please update secclass_map.
 446         # @see https://gitlab.com/linux-kernel/stable/-/commit/dfbd199a7cfe3e3cd8531e1353cdbd7175bfbc5e
 447         #
 448         patch_linux_kernel dfbd199a7cfe3e3cd8531e1353cdbd7175bfbc5e
 449     fi
 450
 451     if { vergte "${kversion}" "3.18"; } && { verlt "${kversion}" "4.16"; } ; then
 452         # Compatibility with binutils >= ~ 2.31
 453         patch_linux_kernel b21ebf2fb4cde1618915a97cc773e287ff49173e
 454     fi
 455
 456     # The above patch only partially applies linux 3.17, and has been, so a
 457     # rebased version is used instead.
 458     if { vergte "${kversion}" "3.17"; } && { verlt "${kversion}" "3.18"; } ; then
 459         cat <<'EOF' | patch -p1
 460 diff --git a/arch/x86/kernel/machine_kexec_64.c b/arch/x86/kernel/machine_kexec_64.c
 461 index 48598105..0652c5b6 100644
 462 --- a/arch/x86/kernel/machine_kexec_64.c
 463 +++ b/arch/x86/kernel/machine_kexec_64.c
 464 @@ -516,6 +516,7 @@ int arch_kexec_apply_relocations_add(const Elf64_Ehdr *ehdr,
 465                                 goto overflow;
 466                         break;
 467                 case R_X86_64_PC32:
 468 +               case R_X86_64_PLT32:
 469                         value -= (u64)address;
 470                         *(u32 *)location = value;
 471                         break;
 472 diff --git a/arch/x86/kernel/module.c b/arch/x86/kernel/module.c
 473 index e69f9882..7c6bc9fe 100644
 474 --- a/arch/x86/kernel/module.c
 475 +++ b/arch/x86/kernel/module.c
 476 @@ -180,6 +180,7 @@ int apply_relocate_add(Elf64_Shdr *sechdrs,
 477                                 goto overflow;
 478                         break;
 479                 case R_X86_64_PC32:
 480 +               case R_X86_64_PLT32:
 481                         val -= (u64)loc;
 482                         *(u32 *)loc = val;
 483  #if 0
 484 diff --git a/arch/x86/tools/relocs.c b/arch/x86/tools/relocs.c
 485 index bbb1d225..8deeacbc 100644
 486 --- a/arch/x86/tools/relocs.c
 487 +++ b/arch/x86/tools/relocs.c
 488 @@ -763,6 +763,7 @@ static int do_reloc64(struct section *sec, Elf_Rel *rel, ElfW(Sym) *sym,
 489         switch (r_type) {
 490         case R_X86_64_NONE:
 491         case R_X86_64_PC32:
 492 +       case R_X86_64_PLT32:
 493                 /*
 494                  * NONE can be ignored and PC relative relocations don't
 495                  * need to be adjusted.
 496 EOF
 497     fi
 498
 499     if ( { vergte "${kversion}" "3.14"; } && { verlt "${kversion}" "4.4"; } ) ||
 500        ( { vergte "${kversion}" "4.8"; } && { verlt "${kversion}" "4.18"; } ); then
 501         # While the original motivation of this patch is for fixing builds using
 502         # clang, the same error occurs between linux >= 3.14 and < 4.4, and in
 503         # 4.15, 4.16.
 504         # For rt-linux, the error has been observed in 4.8, 4.11, and 4.13.
 505         #
 506         # This patch only partially applies due to changes in kernel/Makefile,
 507         # so a supplementary patch is needed
 508         #
 509         # Without this patch, builds fail with
 510         #   Cannot find symbol for section 2: .text.
 511         #   kernel/elfcore.o: failed
 512         #
 513         # @see https://github.com/linuxppc/issues/issues/388
 514         # @see https://lore.kernel.org/lkml/20201204165742.3815221-2-arnd@kernel.org/
 515         #
 516         patch_linux_kernel 6e7b64b9dd6d96537d816ea07ec26b7dedd397b9
 517         if grep -q elfcore.o kernel/Makefile ; then
 518             sed -i '/^.* += elfcore.o$/d' kernel/Makefile
 519         fi
 520     fi
 521     # Same as above for the v4.4 branch
 522     if ( { vergte "${kversion}" "4.4"; } && { verlt "${kversion}" "4.4.257"; } ); then
 523         patch_linux_kernel 3140b0740b31cc63cf2ee08bc3f746b423eb068d
 524         if grep -q elfcore.o kernel/Makefile ; then
 525             sed -i '/^.* += elfcore.o$/d' kernel/Makefile
 526         fi
 527     fi
 528
 529     if { vergte "${kversion}" "4.5"; } && { verlt "${kversion}" "4.8"; } ; then
 530         # Kernels between v4.5 and v4.8 built with gcc >= 8 on arm will hit an
 531         # assembler error :
 532         #
 533         #  kernel/.tmp_fork.s: Assembler messages:
 534         #  kernel/.tmp_fork.s:1790: Error: .err encountered
 535         #
 536         # @see https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85745
 537         #
 538         patch_linux_kernel 9f73bd8bb445e0cbe4bcef6d4cfc788f1e184007
 539     fi
 540
 541     if ( { vergte "${kversion}" "4.4"; } && { verlt "${kversion}" "4.4.136"; } ) ||
 542        ( { vergte "${kversion}" "4.5"; } && { verlt "${kversion}" "4.8"; } ); then
 543         # Hacky patch to deal with the following build error:
 544         #   Cannot find symbol for section 7: .text.unlikely.
 545         #   kernel/kexec_file.o: failed
 546         #   make[1]: *** [scripts/Makefile.build:291: kernel/kexec_file.o] Error 1
 547         #
 548         # This error happens with binutils 2.36 and 2.37, but should probably not
 549         # be an issue with binutils 2.38.
 550         # @see https://github.com/linuxppc/issues/issues/388
 551         # @see https://github.com/bminor/binutils-gdb/commit/c09c8b42021180eee9495bd50d8b35e683d3901b
 552         #
 553         # There is some sort of config (unspecified in past discussions) which
 554         # provokes the error, and there was never a potential fix merged in
 555         # this discussion, in part because the build systems of the kernel
 556         # switched to objtool instead.
 557         #
 558         # @see https://lore.kernel.org/all/20210215162209.5e2a475b@gandalf.local.home/
 559         #
 560         sed -i 's/return txtname;/return shdr0->sh_size ? txtname : NULL;/' scripts/recordmcount.h
 561
 562         # After applying the above patch, the build continues but fails with
 563         # head64.c:(.text.exit+0x5): undefined reference to `__gcov_exit'
 564         #
 565         scripts/config --disable CONFIG_GCOV_KERNEL
 566     fi
 567
 568     if { vergte "${kversion}" "4.5"; } && { verlt "${kversion}" "4.5.5"; } ; then
 569         # drivers/staging/wilc1000/wilc_spi.c:123:34: error: storage size of ‘wilc1000_spi_ops’ isn’t known
 570         patch_linux_kernel ce7b516f3f9e11fe4ee06fad0d7e853bb6e8f160
 571     fi
 572
 573     # Newer binutils don't accept 3 operand 'cmp' instructions on ppc64
 574     # Convert them to 'cmpw' which was previously done silently
 575     if verlt "$kversion" "4.9"; then
 576         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/"
 577         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/"
 578         sed -i "s/\$pie \-o \"\$ofile\"/\$pie --no-dynamic-linker -o \"\$ofile\"/" arch/powerpc/boot/wrapper
 579     fi
 580
 581     if [ "$(scripts/config --state CONFIG_EXTCON_ADC_JACK)" != "n" ] &&
 582            ( { vergte "${kversion}" "4.2"; } && { verlt "${kversion}" "4.12"; } ); then
 583         # 73b6ecdb93e8e77752cae9077c424fcdc6f23c39 introduced a change where
 584         # extcon-adc-jack.h has an incompatible pointer type.
 585         # In GCC >= 5 this will provoke a warning and build failure.
 586         # Eg.
 587         #   drivers/extcon/extcon-adc-jack.c: In function ‘adc_jack_probe’:
 588         #   drivers/extcon/extcon-adc-jack.c:111:64: error: passing argument 2 of ‘devm_extcon_dev_allocate’ from incompatible pointer type [-Werror=incompatible-pointer-types]
 589         #   make[2]: *** [scripts/Makefile.build:295: drivers/extcon/extcon-adc-jack.o] Error 1
 590         #
 591         # 8a522bf2d4f788306443d36b26b54f0aedcdfdbe (in 4.11) has a fix for this warning
 592         #
 593         patch_linux_kernel 8a522bf2d4f788306443d36b26b54f0aedcdfdbe
 594     fi
 595
 596     if ( { vergte "${kversion}" "4.15"; } && { verlt "${kversion}" "4.15.2"; } ) || \
 597        ( { vergte "${kversion}" "4.14"; } && { verlt "${kversion}" "4.14.18"; } ) ; then
 598         # Fix an objtool Segmentation fault
 599         patch_linux_kernel dd12561854824fd1f05baf2a1b794faa046e2425
 600     fi
 601
 602     if { vergte "${kversion}" "4.14"; } && { verlt "${kversion}" "4.14.268"; } ; then
 603         # Builds fail due to -Werror=use-after-free in sigchain.o and help.o
 604         patch_linux_kernel e89bb266b710ce056f141f29f091fd468a4a8185
 605     fi
 606
 607     # Fix a typo in v2.6.36.x
 608     if [ -f "arch/x86/kernel/entry_64.S" ]; then
 609       sed -i 's/END(do_hypervisor_callback)/END(xen_do_hypervisor_callback)/' arch/x86/kernel/entry_64.S
 610     fi
 611
 612     # Fix compiler switch in vdso Makefile for 2.6.36 to 2.6.36.2
 613     if { vergte "$kversion" "2.6.36" && verlte "$kversion" "2.6.36.3"; }; then
 614       sed -i 's/-m elf_x86_64/-m64/' arch/x86/vdso/Makefile
 615       sed -i 's/-m elf_i386/-m32/' arch/x86/vdso/Makefile
 616     fi
 617
 618     # Fix kernel < 3.0 with gcc >= 4.7
 619     if verlt "$kversion" "3.0"; then
 620       sed -i '/linux\/compiler.h/a #include <linux\/linkage.h> \/* For asmregparm *\/' arch/x86/include/asm/ptrace.h
 621       sed -i 's/extern long syscall_trace_enter/extern asmregparm long syscall_trace_enter/' arch/x86/include/asm/ptrace.h
 622       sed -i 's/extern void syscall_trace_leave/extern asmregparm void syscall_trace_leave/' arch/x86/include/asm/ptrace.h
 623       echo "header-y += linkage.h" >> include/linux/Kbuild
 624     fi
 625
 626     if [ "${cross_arch}" = "powerpc" ] ; then
 627         if { vergte "${kversion}" "4.15"; } && { verlt "${kversion}" "4.16"; } ; then
 628             # Avoid register errors such as
 629             # aes_generic.c:(.text+0x4e0): undefined reference to `_restgpr_31_x'
 630             # @see https://gitlab.com/linux-kernel/stable/-/commit/148b974deea927f5dbb6c468af2707b488bfa2de
 631             make_args+=(
 632                 CFLAGS_aes_generic.o=''
 633             )
 634         fi
 635     fi
 636
 637     if [ "$(scripts/config --state CONFIG_DEBUG_INFO_BTF)" == "y" ] &&
 638            { vergte "${pahole_version}" "1.24"; } &&
 639            { vergte "${kversion}" "5.10"; } && { verlt "${kversion}" "6.0"; } ;then
 640         # Some kernels Eg. Ubuntu-hwe-5.13-5.13.0-52.59_20.04.1
 641         # fail with the following error:
 642         #   BTFIDS  vmlinux
 643         #   FAILED: load BTF from vmlinux: Invalid argument
 644         #
 645         # When CONFIG_DEBUG_INFO_BTF is set, certain versions of pahole require
 646         # `--skip_encoding_btf_enum64` to be passed as the kernel doesn't define
 647         # BTF_KIND_ENUM64.
 648         #
 649         # Introduced in 341dfcf8d78eaa3a2dc96dea06f0392eb2978364 (~v5.10)
 650         # @see https://lore.kernel.org/bpf/20220825171620.cioobudss6ovyrkc@altlinux.org/t/
 651         #
 652         if [ -f "scripts/pahole-flags.sh" ] ; then
 653             # shellcheck disable=SC2016
 654             sed -i 's/ -J ${PAHOLE_FLAGS} / -J ${PAHOLE_FLAGS} --skip_encoding_btf_enum64 /' scripts/link-vmlinux.sh
 655         else
 656             # shellcheck disable=SC2016
 657             sed -i 's/ -J ${extra_paholeopt} / -J ${extra_paholeopt} --skip_encoding_btf_enum64 /' scripts/link-vmlinux.sh
 658         fi
 659     fi
 660
 661     # GCC 4.8
 662     if [ "$HOSTCC" == "gcc-4.8" ]; then
 663         scripts/config --disable CONFIG_CC_STACKPROTECTOR_STRONG
 664         scripts/config --disable CONFIG_PPC_OF_BOOT_TRAMPOLINE
 665     fi
 666
 667     # Don't try to sign modules
 668     scripts/config --disable CONFIG_MODULE_SIG
 669
 670     # Disable kernel stack frame correctness validation, introduced in 4.6.0 and currently fails
 671     scripts/config --disable CONFIG_STACK_VALIDATION
 672
 673     # Cause problems with inline assembly on i386
 674     scripts/config --disable CONFIG_DEBUG_SECTION_MISMATCH
 675
 676     # Don't build samples, they are broken on some kernel releases
 677     scripts/config --disable CONFIG_SAMPLES
 678     scripts/config --disable CONFIG_BUILD_DOCSRC
 679
 680     # Disable kcov
 681     scripts/config --disable CONFIG_KCOV
 682
 683     # Broken on some RT kernels
 684     scripts/config --disable CONFIG_HYPERV
 685
 686     # Broken drivers
 687     scripts/config --disable CONFIG_RAPIDIO_TSI721
 688     scripts/config --disable CONFIG_SGI_XP
 689     scripts/config --disable CONFIG_MFD_WM8994
 690     scripts/config --disable CONFIG_DRM_RADEON
 691     scripts/config --disable CONFIG_SND_SOC_WM5100
 692     # More recent compiler optimizations (from gcc 8 onwards )expose build errors
 693     # with netronome on older kernels.
 694     # Observed in 4.11-rt, 4.15-4.17, 5.0-rt - 5.16-rt
 695     # It seems easier to disable the driver than to attempt patching.
 696     # Eg.
 697     #   In function ‘ur_load_imm_any’,
 698     #   inlined from ‘jeq_imm’ at drivers/net/ethernet/netronome/nfp/bpf/jit.c:3146:13:
 699     #   ./include/linux/compiler.h:350:45: error: call to ‘__compiletime_assert_1062’ declared with attribute error: FIELD_FIT: value too large for the field
 700     #   350 |         _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
 701     #
 702     scripts/config --disable CONFIG_NET_VENDOR_NETRONOME
 703     # Eg.
 704     #  In function ‘memcpy’,
 705     #  inlined from ‘kszphy_get_strings’ at drivers/net/phy/micrel.c:664:3:
 706     #  ./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
 707     #  305 |                         __read_overflow2();
 708     #      |                         ^~~~~~~~~~~~~~~~~~
 709     #  make[3]: *** [scripts/Makefile.build:308: drivers/net/phy/micrel.o] Error 1
 710     #
 711     scripts/config --disable CONFIG_MICREL_PHY
 712
 713
 714     # IGBVF won't build with recent gcc on 2.6.38.x
 715     if { vergte "$kversion" "2.6.37" && verlt "$kversion" "2.6.38"; }; then
 716       scripts/config --disable CONFIG_IGBVF
 717     fi
 718
 719     # Don't fail the build on warnings
 720     scripts/config --disable CONFIG_WERROR
 721     scripts/config --enable CONFIG_PPC_DISABLE_WERROR
 722
 723     # Set required options
 724     scripts/config --enable CONFIG_TRACEPOINTS
 725     scripts/config --enable CONFIG_KALLSYMS
 726     scripts/config --enable CONFIG_HIGH_RES_TIMERS
 727     scripts/config --enable CONFIG_KPROBES
 728     scripts/config --enable CONFIG_FTRACE
 729     scripts/config --enable CONFIG_BLK_DEV_IO_TRACE
 730     scripts/config --enable CONFIG_KALLSYMS_ALL
 731     scripts/config --enable CONFIG_HAVE_SYSCALL_TRACEPOINTS
 732     scripts/config --enable CONFIG_PERF_EVENTS
 733     scripts/config --enable CONFIG_EVENT_TRACING
 734     scripts/config --enable CONFIG_KRETPROBES
 735
 736     if [ -n "${DEBUG}" ] ; then
 737         cat .config
 738     fi
 739
 740     make "$update_conf_target" "${make_args[@]}"
 741     make -j"$NPROC" "${make_args[@]}"
 742
 743     krelease=$(make -s kernelrelease "${make_args[@]}")
 744
 745     # Save the kernel and modules
 746     mkdir -p "$LINUX_INSTOBJ_DIR/boot"
 747     make INSTALL_MOD_PATH="$LINUX_INSTOBJ_DIR" INSTALL_MOD_STRIP=1 modules_install "${make_args[@]}"
 748     make INSTALL_MOD_PATH="$LINUX_INSTOBJ_DIR" INSTALL_PATH="$LINUX_INSTOBJ_DIR/boot" install "${make_args[@]}"
 749     rm -f "$LINUX_INSTOBJ_DIR/lib/modules/${krelease}/source" "$LINUX_INSTOBJ_DIR/lib/modules/${krelease}/build"
 750     ln -s ../../../../sources "$LINUX_INSTOBJ_DIR/lib/modules/${krelease}/source"
 751     ln -s ../../../../sources "$LINUX_INSTOBJ_DIR/lib/modules/${krelease}/source"
 752 }
 753
 754
 755 extract_distro_headers() {
 756
 757     # Enter linux source dir
 758     cd "${LINUX_SRCOBJ_DIR}"
 759
 760
 761     # For RT kernels, copy version file
 762     if [ -s localversion-rt ]; then
 763         cp -a localversion-rt "${LINUX_HDROBJ_DIR}"
 764     fi
 765
 766     # Copy all Makefile related stuff
 767     find . -path './include/*' -prune \
 768         -o -path './scripts/*' -prune -o -type f \
 769         \( -name 'Makefile*' -o -name 'Kconfig*' -o -name 'Kbuild*' -o \
 770             -name '*.sh' -o -name '*.pl' -o -name '*.lds' \) \
 771         -print | cpio -pd --preserve-modification-time "${LINUX_HDROBJ_DIR}"
 772
 773     # Copy base scripts and include dirs
 774     cp -a scripts include "${LINUX_HDROBJ_DIR}"
 775
 776     # Copy arch includes
 777     (find arch -name include -type d -print0 | \
 778         xargs -0 -n1 -I '{}' find '{}' -type f) | \
 779         cpio -pd --preserve-modification-time "${LINUX_HDROBJ_DIR}"
 780
 781     # Copy arch scripts
 782     (find arch -name scripts -type d -print0 | \
 783         xargs -0 -n1 -I '{}' find '{}' -type f) | \
 784         cpio -pd --preserve-modification-time "${LINUX_HDROBJ_DIR}"
 785
 786     # Cleanup scripts
 787     rm -f "${LINUX_HDROBJ_DIR}/scripts/*.o"
 788     rm -f "${LINUX_HDROBJ_DIR}/scripts/*/*.o"
 789
 790     # On powerpc 32bits this object is required to link modules
 791     if [ "${karch}" = "powerpc" ]; then
 792         if [ "$(scripts/config -s CONFIG_PPC64)" = "y" ] && vergte "${kversion}" "5.4"; then
 793             :
 794         else
 795             cp -a --parents arch/powerpc/lib/crtsavres.[So] "${LINUX_HDROBJ_DIR}/"
 796         fi
 797     fi
 798
 799     # On arm64 between 4.13 and 1.15 this object is required to build with ftrace support
 800     if [ "${karch}" = "arm64" ]; then
 801         if [ -f "arch/arm64/kernel/ftrace-mod.S" ]; then
 802             cp -a --parents arch/arm64/kernel/ftrace-mod.[So] "${LINUX_HDROBJ_DIR}/"
 803         fi
 804     fi
 805
 806     # Newer kernels need objtool to build modules when CONFIG_STACK_VALIDATION=y
 807     if [ -f tools/objtool/objtool ]; then
 808       cp -a --parents tools/objtool/objtool "${LINUX_HDROBJ_DIR}/"
 809     fi
 810
 811     if [ -f "arch/x86/kernel/macros.s" ]; then
 812       cp -a --parents arch/x86/kernel/macros.s "${LINUX_HDROBJ_DIR}/"
 813     fi
 814
 815     # Copy modules related stuff, if available
 816     if [ -s Module.symvers ]; then
 817         cp Module.symvers "${LINUX_HDROBJ_DIR}"
 818     fi
 819
 820     if [ -s System.map ]; then
 821         cp System.map "${LINUX_HDROBJ_DIR}"
 822     fi
 823
 824     if [ -s Module.markers ]; then
 825         cp Module.markers "${LINUX_HDROBJ_DIR}"
 826     fi
 827
 828     # Copy config file
 829     cp .config "${LINUX_HDROBJ_DIR}"
 830
 831     # Make sure the Makefile and version.h have a matching timestamp so that
 832     # external modules can be built
 833     if [ -s "${LINUX_HDROBJ_DIR}/include/generated/uapi/linux/version.h" ]; then
 834         touch -r "${LINUX_HDROBJ_DIR}/Makefile" "${LINUX_HDROBJ_DIR}/include/generated/uapi/linux/version.h"
 835     elif [ -s "${LINUX_HDROBJ_DIR}/include/linux/version.h" ]; then
 836         touch -r "${LINUX_HDROBJ_DIR}/Makefile" "${LINUX_HDROBJ_DIR}/include/linux/version.h"
 837     else
 838         echo "Missing version.h"
 839         exit 1
 840     fi
 841     touch -r "${LINUX_HDROBJ_DIR}/.config" "${LINUX_HDROBJ_DIR}/include/generated/autoconf.h"
 842
 843     # Copy .config to include/config/auto.conf so "make prepare" is unnecessary.
 844     if [ ! -f "${LINUX_HDROBJ_DIR}/include/config/auto.conf" ]; then
 845         cp "${LINUX_HDROBJ_DIR}/.config" "${LINUX_HDROBJ_DIR}/include/config/auto.conf"
 846     fi
 847
 848     # Finally clean the object files from the full source tree
 849     make clean
 850
 851     # And regen the modules support files
 852     make modules_prepare "${make_args[@]}"
 853
 854     # On powerpc 32bits this object is required to link modules
 855     if [ "${karch}" = "powerpc" ]; then
 856         if [ "$(scripts/config -s CONFIG_PPC64)" = "y" ] && vergte "${kversion}" "5.4"; then
 857             :
 858         else
 859             make arch/powerpc/lib/crtsavres.o "${make_args[@]}"
 860         fi
 861     fi
 862
 863     # On arm64 between 4.13 and 4.15 this object is required to build with ftrace support
 864     if [ "${karch}" = "arm64" ]; then
 865         if [ -f "arch/arm64/kernel/ftrace-mod.S" ]; then
 866             make arch/arm64/kernel/ftrace-mod.o "${make_args[@]}"
 867         fi
 868     fi
 869
 870     # Version specific tasks
 871     case "$ktag" in
 872       Ubuntu*)
 873         # Add Ubuntu ABI number to kernel headers, this is normally done by the packaging code
 874         ABINUM="$(echo "$ktag" | grep -P -o 'Ubuntu-(lts-)?.*-\K\d+(?=\..*)')"
 875         echo "#define UTS_UBUNTU_RELEASE_ABI $ABINUM" >> include/generated/utsrelease.h
 876         echo "#define UTS_UBUNTU_RELEASE_ABI $ABINUM" >> "${LINUX_HDROBJ_DIR}/include/generated/utsrelease.h"
 877         ;;
 878     esac
 879 }
 880
 881
 882 build_modules() {
 883
 884     local kdir="$1"
 885     local outdir="$2"
 886     local kversion
 887
 888     kversion=$(make -C "$LINUX_HDROBJ_DIR" -s kernelversion)
 889
 890     # Try to catch some compatibility problems by turning some
 891     # warnings into errors.
 892     #export KCFLAGS="$KCFLAGS -Wall -Werror"
 893
 894     # Enter lttng-modules source dir
 895     cd "${MODULES_GIT_DIR}"
 896
 897     # kernels 3.10 to 3.10.13 and 3.11 to 3.11.2 introduce a deadlock in the
 898     # timekeeping subsystem. We want those build to fail.
 899     if { vergte "$kversion" "3.10" && verlte "$kversion" "3.10.13"; } || \
 900        { vergte "$kversion" "3.11" && verlte "$kversion" "3.11.2"; }; then
 901
 902         set +e
 903
 904         # Build modules
 905         KERNELDIR="${kdir}" make -j"${NPROC}" V=1 "${make_args[@]}"
 906         ret=$?
 907
 908         set -e
 909
 910         # We expect this build to fail, if it doesn't, fail the job.
 911         if [ "$ret" -eq 0 ]; then
 912             echo "This build should have failed."
 913             exit 1
 914         fi
 915
 916         # We have to publish at least one file or the build will fail
 917         echo "This kernel is broken, there is a deadlock in the timekeeping subsystem." > "${outdir}/BROKEN.txt.ko"
 918
 919         KERNELDIR="${kdir}" make clean
 920
 921     else # Regular build
 922
 923         # Build modules against full kernel sources
 924         KERNELDIR="${kdir}" make -j"${NPROC}" V=1 "${make_args[@]}"
 925
 926         # Install modules to build dir
 927         KERNELDIR="${kdir}" make INSTALL_MOD_PATH="${outdir}" modules_install
 928
 929         # Clean build dir
 930         KERNELDIR="${kdir}" make clean
 931     fi
 932 }
 933
 934
 935 ## MAIN ##
 936
 937 # Use all CPU cores
 938 NPROC=$(nproc)
 939
 940 MODULES_GIT_DIR="${WORKSPACE}/src/lttng-modules"
 941 LINUX_GIT_DIR="${WORKSPACE}/src/linux"
 942
 943 LINUX_OBJ_DIR="${WORKSPACE}/linux"
 944 LINUX_SRCOBJ_DIR="${LINUX_OBJ_DIR}/sources"
 945 LINUX_HDROBJ_DIR="${LINUX_OBJ_DIR}/headers"
 946 LINUX_INSTOBJ_DIR="${LINUX_OBJ_DIR}/install"
 947
 948 MODULES_OUTPUT_KSRC_DIR="${WORKSPACE}/build/lttng-modules-ksrc"
 949 MODULES_OUTPUT_KHDR_DIR="${WORKSPACE}/build/lttng-modules-khdr"
 950
 951 LINUX_GIT_REF_REPO_DIR="$HOME/gitcache/linux-stable.git/"
 952
 953 OBJ_STORE_URL="s3://jenkins"
 954
 955 cd "$WORKSPACE"
 956
 957 # Create build directories
 958 mkdir -p "${LINUX_SRCOBJ_DIR}" "${LINUX_HDROBJ_DIR}" "${LINUX_INSTOBJ_DIR}" "${MODULES_OUTPUT_KSRC_DIR}" "${MODULES_OUTPUT_KHDR_DIR}"
 959
 960 print_header "Clone LTTng-modules sources"
 961 git_clone_modules_sources
 962
 963 # Setup cross compile env if available
 964 if [ "x${cross_arch}" != "x" ]; then
 965
 966     case "$cross_arch" in
 967         "armhf")
 968             karch="arm"
 969             cross_compile="arm-linux-gnueabihf-"
 970             vanilla_config="imx_v6_v7_defconfig"
 971             ubuntu_config="armhf-config.flavour.generic"
 972             ;;
 973
 974         "arm64")
 975             karch="arm64"
 976             cross_compile="aarch64-linux-gnu-"
 977             vanilla_config="defconfig"
 978             ubuntu_config="arm64-config.flavour.generic"
 979             ;;
 980
 981         "powerpc")
 982             karch="powerpc"
 983             cross_compile="powerpc-linux-gnu-"
 984             vanilla_config="ppc44x_defconfig"
 985             ubuntu_config="powerpc-config.flavour.powerpc-smp"
 986             ;;
 987
 988         "ppc64el")
 989             karch="powerpc"
 990             cross_compile="powerpc64le-linux-gnu-"
 991             vanilla_config="pseries_le_defconfig"
 992             ubuntu_config="ppc64el-config.flavour.generic"
 993             ;;
 994
 995         *)
 996             echo "Unsupported cross arch $cross_arch"
 997             exit 1
 998             ;;
 999     esac
1000
1001     # Export variables used by Kbuild for cross compilation
1002     export ARCH="${karch}"
1003     export CROSS_COMPILE="${cross_compile}"
1004
1005 # Set arch specific values if we are not cross compiling
1006 elif [ "x${arch}" != "x" ]; then
1007
1008     case "$arch" in
1009         "i386")
1010             karch="x86"
1011             vanilla_config="allmodconfig"
1012             ubuntu_config="i386-config.flavour.generic"
1013             ;;
1014
1015         "amd64")
1016             karch="x86"
1017             vanilla_config="allmodconfig"
1018             ubuntu_config="amd64-config.flavour.generic"
1019             ;;
1020
1021         "armhf")
1022             karch="arm"
1023             vanilla_config="allmodconfig"
1024             ubuntu_config="armhf-config.flavour.generic"
1025             ;;
1026
1027         "arm64")
1028             karch="arm64"
1029             vanilla_config="allmodconfig"
1030             ubuntu_config="arm64-config.flavour.generic"
1031             ;;
1032
1033         "powerpc")
1034             karch="powerpc"
1035             vanilla_config="allmodconfig"
1036             ubuntu_config="powerpc-config.flavour.powerpc-smp"
1037             ;;
1038
1039         "ppc64el")
1040             karch="powerpc"
1041             vanilla_config="allmodconfig"
1042             ubuntu_config="ppc64el-config.flavour.generic"
1043             ;;
1044
1045         *)
1046             echo "Unsupported arch $arch"
1047             exit 1
1048             ;;
1049     esac
1050 else
1051     echo "No arch or cross_arch specified"
1052     exit 1
1053 fi
1054
1055
1056
1057 # First get the kernel build from the object store, or build it, if it's
1058 # not available.
1059
1060 set +x
1061 echo "# Setup endpoint
1062 host_base = obj.internal.efficios.com
1063 host_bucket = obj.internal.efficios.com
1064 bucket_location = us-east-1
1065 use_https = True
1066
1067 # Setup access keys
1068 access_key = jenkins
1069 secret_key = echo123456
1070
1071 # Enable S3 v4 signature APIs
1072 signature_v2 = False" > "$WORKSPACE/.s3cfg"
1073 set -x
1074
1075 url_hash="$(echo -n "$kgitrepo" | md5sum | awk '{ print $1 }')"
1076 obj_name="linux.tar.bz2"
1077
1078 if [ -z "${cross_arch}" ]; then
1079     obj_url_prefix="$OBJ_STORE_URL/linux-build/$url_hash/$ktag/platform-${platform}/$arch/native"
1080 else
1081     obj_url_prefix="$OBJ_STORE_URL/linux-build/$url_hash/$ktag/platform-${platform}/${cross_arch}"
1082 fi
1083
1084 obj_url="$obj_url_prefix/$obj_name"
1085
1086 set +e
1087 # In s3cmd 2.3, the return code of get when an object does not exist (64)
1088 # is different than in 2.2 (12). The return codes of 's3cmd info' are
1089 # consistent between 2.2 and 2.3.
1090 s3cmd -c "$WORKSPACE/.s3cfg" info "$obj_url"
1091 ret=$?
1092 set -e
1093
1094 case "$ret" in
1095     "0")
1096       print_header "Get sources and prebuilt kernel"
1097       s3cmd -c "$WORKSPACE/.s3cfg" get "$obj_url"
1098       extract_archive_obj
1099
1100       print_header "Select compiler and set build flags"
1101       select_compiler
1102       export_kbuild_flags
1103       ;;
1104
1105     "12")
1106       print_header "Clone kernel sources"
1107
1108       # Build all the things and upload
1109       # then finish the module build...
1110
1111       git_clone_linux_sources
1112       git_export_linux_sources
1113
1114       print_header "Select compiler and set build flags"
1115       select_compiler
1116       export_kbuild_flags
1117
1118       ## PREPARE FULL LINUX SOURCE TREE
1119       print_header "Build kernel from source"
1120       build_linux_kernel
1121
1122       ## EXTRACT DISTRO STYLE KERNEL HEADERS / DEVEL
1123       extract_distro_headers
1124
1125       print_header "Upload kernel to object storage"
1126       tar_archive_obj
1127       upload_archive_obj
1128
1129       ;;
1130
1131     *)
1132       echo "Unknown error? Abort"
1133       exit 1
1134       ;;
1135 esac
1136
1137
1138 ## BUILD modules
1139 # Either we downloaded a pre-build kernel or we built it and uploaded
1140 # the archive for future builds.
1141
1142 cd "$WORKSPACE"
1143
1144 print_header "Build modules against full kernel sources"
1145 build_modules "${LINUX_SRCOBJ_DIR}" "${MODULES_OUTPUT_KSRC_DIR}"
1146
1147 print_header "Build modules against kernel headers"
1148 build_modules "${LINUX_HDROBJ_DIR}" "${MODULES_OUTPUT_KHDR_DIR}"
1149
1150
1151 print_header "Check for built modules in install directory"
1152
1153 # Make sure some modules were actually built
1154 tree "${MODULES_OUTPUT_KSRC_DIR}"
1155 if [ "x$(find "${MODULES_OUTPUT_KSRC_DIR}" -name '*.ko*' -printf yes -quit)" != "xyes" ]; then
1156   echo "No modules built!"
1157   exit 1
1158 fi
1159
1160 tree "${MODULES_OUTPUT_KHDR_DIR}"
1161 if [ "x$(find "${MODULES_OUTPUT_KHDR_DIR}" -name '*.ko*' -printf yes -quit)" != "xyes" ]; then
1162   echo "No modules built!"
1163   exit 1
1164 fi
1165
1166 # EOF