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 [ "${cross_arch}" = "powerpc" ] && vergte "${kversion}" "4.10"; then
 292           echo "Ubuntu removed big endian powerpc configuration from kernel >= 4.10. Don't try to build it."
 293           exit 0
 294         fi
 295
 296         if [ "${cross_arch}" = "riscv64" ] && verlt "${kversion}" "6.2"; then
 297           echo "Ubuntu added RISC-V config to their 'regular' kernels in v6.2. Don't try to build it."
 298           exit 0
 299         fi
 300
 301         fakeroot debian/rules clean KW_DEFCONFIG_DIR=.
 302
 303         # Hack for kernel Ubuntu-hwe-5.8
 304         # The debian/control file is produced by the clean target above, so this
 305         # check needs to happen afterwards.
 306         if [ ! -f "debian/compat" ] && ! grep -q debhelper-compat debian/control; then
 307             echo "10" > "debian/compat"
 308         fi
 309
 310         # genconfigs check can fail in certain cases, eg. when a more recent
 311         # compiler exposes kernel configuration flags which aren't set in the
 312         # Ubuntu annotations.
 313         # In any case, the configuration will be updated with any missing values
 314         # later in our build script.
 315         fakeroot debian/rules genconfigs KW_DEFCONFIG_DIR=. do_skip_checks=true
 316         cp CONFIGS/"${ubuntu_config}" .config
 317         ;;
 318
 319       *)
 320         # Force 32bit build on i386, default is 64bit
 321         if [ "$arch" = "i386" ]; then
 322             export ARCH="i386"
 323         fi
 324
 325         make "${vanilla_config}" "${make_args[@]}"
 326         ;;
 327     esac
 328
 329     if [ "${vanilla_config}" = "pseries_defconfig" ] && [ "${cross_arch}" = "ppc64el" ] ; then
 330         # @see diff <(git show v3.13:arch/powerpc/configs/pseries_defconfig) <(git show v3.13:arch/powerpc/configs/pseries_le_defconfig)
 331         scripts/config --enable CONFIG_CPU_LITTLE_ENDIAN
 332         scripts/config --enable CONFIG_CMA
 333         scripts/config --disable CONFIG_XMON_DEFAULT
 334         # scripts/config --disable CONFIG_VIRTUALIZATION
 335         # scripts/config --disable CONFIG_KVM_BOOK3S_64
 336         scripts/config --disable CONFIG_KVM_BOOK3S_64_HV
 337     fi
 338
 339     # oldnoconfig was renamed in 4.19
 340     if vergte "$kversion" "4.19"; then
 341         update_conf_target="olddefconfig"
 342     else
 343         update_conf_target="oldnoconfig"
 344     fi
 345
 346     # Fix 'defined(@array)' was removed from recent perl
 347     if [ -f "kernel/timeconst.pl" ]; then
 348       sed -i 's/defined(\@\(.*\))/@\1/' kernel/timeconst.pl
 349     fi
 350
 351     # Fix syntax of inline assembly which is confused with C++11 raw strings on gcc >= 5
 352     if [ "$HOSTCC" != "gcc-4.8" ]; then
 353       if [ -f "arch/x86/kvm/svm.c" ]; then
 354         sed -i 's/ R"/ R "/g; s/"R"/" R "/g' arch/x86/kvm/svm.c
 355       fi
 356
 357       if [ -f "arch/x86/kvm/vmx.c" ]; then
 358         sed -i 's/ R"/ R "/g; s/"R"/" R "/g' arch/x86/kvm/vmx.c
 359       fi
 360     fi
 361
 362     if { verlt "${kversion}" "5.11"; } && { vergte "${kversion}" "4.10"; } ; then
 363         # Binutils > 2.35 strips empty symbol tables, causing obltool to fail
 364         # in certain cases when files are empty.
 365         # @see https://gitlab.com/linux-kernel/stable/-/commit/1d489151e9f9d1647110277ff77282fe4d96d09b
 366         #
 367         # There doesn't seem to be any LD/AS/AR flags to control this behaviour,
 368         # therefore patching tools/objtool/elf.c is attempted.
 369         patch_linux_kernel 1d489151e9f9d1647110277ff77282fe4d96d09b
 370         if { verlt "${kversion}" "4.18"; } ; then
 371             patch_linux_kernel e81e0724432542af8d8c702c31e9d82f57b1ff31
 372         fi
 373     fi
 374
 375     if { vergt "${selected_cc_version}" "7"; } && { vergte "${kversion}" "4.14"; } && { verlt "${kversion}" "4.17"; } ; then
 376         # Builds fail due to -Werror=restrict in pager.o and str_error_r.o
 377         if { verlt "${kversion}" "4.16"; } ; then
 378             # This is patched since objtool's Makefile doesn't respect HOSTCFLAGS
 379             # @see https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ad343a98e74e85aa91d844310e797f96fee6983b
 380             patch_linux_kernel ad343a98e74e85aa91d844310e797f96fee6983b
 381         fi
 382         if { verlt "${kversion}" "4.17"; } ; then
 383             # This is patched since objtool's Makefile doesn't respect HOSTCFLAGS
 384             # @see https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=854e55ad289ef8888e7991f0ada85d5846f5afb9
 385             patch_linux_kernel 854e55ad289ef8888e7991f0ada85d5846f5afb9
 386         fi
 387
 388     fi
 389
 390     if { vergt "${selected_cc_version}" "9"; } && { verlt "${kversion}" "5.6"; } ; then
 391         # Duplicate decalarations of __force_order
 392         # @see https://gitlab.com/linux-kernel/stable/-/commit/df6d4f9db79c1a5d6f48b59db35ccd1e9ff9adfc
 393         # However, kaslr_64.c doesn't exit in 4.15, 4.16, it's named pagetable.c
 394         if [ -f arch/x86/boot/compressed/pagetable.c ] ; then
 395             sed -i '/^unsigned long __force_order;$/d' arch/x86/boot/compressed/pagetable.c
 396         fi
 397         if [ -f arch/x86/boot/compressed/kaslr_64.c ] ; then
 398             patch_linux_kernel df6d4f9db79c1a5d6f48b59db35ccd1e9ff9adfc
 399         fi
 400     fi
 401
 402     if { vergte "${kversion}" "4.18"; } && { verlt "${kversion}" "4.19"; } ; then
 403         # In some cases, compiling net/bpfilter can fail with the following error:
 404         #   net/bpfilter/main.c:9:10: fatal error: include/uapi/linux/bpf.h: No such file or directory
 405         #   make[2]: *** [scripts/Makefile.host:107: net/bpfilter/main.o] Error 1
 406         #
 407         # While the issue is potentially in a number of old versions, it has only
 408         # been observed in v4.18-rt
 409         #
 410         patch_linux_kernel 303a339f30a9441c4695d3d2cc78f1b33cd959ff
 411     fi
 412
 413     if { vergte "${kversion}" "4.18"; } && { verlt "${kversion}" "4.19"; } ; then
 414         # In some cases, compiling net/bpfilter can fail with the following error:
 415         #   net/bpfilter/main.c:9:10: fatal error: include/uapi/linux/bpf.h: No such file or directory
 416         #   make[2]: *** [scripts/Makefile.host:107: net/bpfilter/main.o] Error 1
 417         #
 418         # While the issue is potentially in a number of old versions, it has only
 419         # been observed in v4.18-rt
 420         #
 421         patch_linux_kernel 303a339f30a9441c4695d3d2cc78f1b33cd959ff
 422     fi
 423
 424     if { vergte "${kversion}" "4.15"; } && { verlt "${kversion}" "4.18"; } ; then
 425         # Some old kernels fail to build when make is too new
 426         # @see https://gitlab.com/linux-kernel/stable/-/commit/9feeb638cde083c737e295c0547f1b4f28e99583
 427         patch_linux_kernel 9564a8cf422d7b58f6e857e3546d346fa970191e
 428     fi
 429
 430     if { vergte "${kversion}" "4.14"; } && { verlt "${kversion}" "4.14.55"; } ; then
 431         # Some old kernels fail to build when make is too new
 432         # @see https://gitlab.com/linux-kernel/stable/-/commit/9feeb638cde083c737e295c0547f1b4f28e99583
 433         patch_linux_kernel e82885490a611f2b75a6c27cd7bb09665c1740be
 434     fi
 435
 436     if ( { vergte "${kversion}" "4.15"; } && { verlt "${kversion}" "4.18"; } ) || \
 437        ( { vergte "${kversion}" "4.14"; } && { verlt "${kversion}" "4.14.56"; } ) ; then
 438         # Some old kernels fail to build when make is too new
 439         # @see https://gitlab.com/linux-kernel/stable/-/commit/9feeb638cde083c737e295c0547f1b4f28e99583
 440         patch_linux_kernel 9feeb638cde083c737e295c0547f1b4f28e99583
 441     fi
 442
 443     if ( { vergte "${kversion}" "4.12"; } && { verlt "${kversion}" "4.20.17"; } ) || \
 444        ( { vergte "${kversion}" "5.0"; } && { verlt "${kversion}" "5.0.12"; } ) ; then
 445         # Old kernels can fail to build while on newer host kernels with errors
 446         # such as:
 447         #   In file included from scripts/selinux/genheaders/genheaders.c:19:
 448         #   ./security/selinux/include/classmap.h:249:2: error: #error New address family defined, please update secclass_map.
 449         # @see https://gitlab.com/linux-kernel/stable/-/commit/dfbd199a7cfe3e3cd8531e1353cdbd7175bfbc5e
 450         #
 451         patch_linux_kernel dfbd199a7cfe3e3cd8531e1353cdbd7175bfbc5e
 452     fi
 453
 454     # Compatibility with binutils >= ~ 2.31
 455     if { vergte "${kversion}" "3.19"; } && { verlt "${kversion}" "4.16"; } ; then
 456         patch_linux_kernel b21ebf2fb4cde1618915a97cc773e287ff49173e
 457     fi
 458     if { vergte "${kversion}" "3.17"; } && { verlt "${kversion}" "3.18.69"; } ; then
 459         patch_linux_kernel edb9d2d5e647e7a8521b0d35f8452deb02dfd138
 460     fi
 461     if { vergte "${kversion}" "3.17"; } && { verlt "${kversion}" "3.18.100"; } ; then
 462         patch_linux_kernel 3be6583f0b6f1bf1ee650ebf473d9dee36836527
 463         patch_linux_kernel 12d839211d080f6a9c370398c41a260365d34c62
 464     fi
 465     if { vergte "${kversion}" "3.16"; } && { verlt "${kversion}" "3.16.82"; } ; then
 466         patch_linux_kernel ad10e6d464796f2a481de4039a43b9cfca034e1c
 467     fi
 468
 469     if ( { vergte "${kversion}" "3.14"; } && { verlt "${kversion}" "4.4"; } ) ||
 470        ( { vergte "${kversion}" "4.8"; } && { verlt "${kversion}" "4.18"; } ); then
 471         # While the original motivation of this patch is for fixing builds using
 472         # clang, the same error occurs between linux >= 3.14 and < 4.4, and in
 473         # 4.15, 4.16.
 474         # For rt-linux, the error has been observed in 4.8, 4.11, and 4.13.
 475         #
 476         # This patch only partially applies due to changes in kernel/Makefile,
 477         # so a supplementary patch is needed
 478         #
 479         # Without this patch, builds fail with
 480         #   Cannot find symbol for section 2: .text.
 481         #   kernel/elfcore.o: failed
 482         #
 483         # @see https://github.com/linuxppc/issues/issues/388
 484         # @see https://lore.kernel.org/lkml/20201204165742.3815221-2-arnd@kernel.org/
 485         #
 486         patch_linux_kernel 6e7b64b9dd6d96537d816ea07ec26b7dedd397b9
 487         if grep -q elfcore.o kernel/Makefile ; then
 488             sed -i '/^.* += elfcore.o$/d' kernel/Makefile
 489         fi
 490     fi
 491     # Same as above for the v4.4 branch
 492     if ( { vergte "${kversion}" "4.4"; } && { verlt "${kversion}" "4.4.257"; } ); then
 493         patch_linux_kernel 3140b0740b31cc63cf2ee08bc3f746b423eb068d
 494         if grep -q elfcore.o kernel/Makefile ; then
 495             sed -i '/^.* += elfcore.o$/d' kernel/Makefile
 496         fi
 497     fi
 498
 499     if { vergte "${kversion}" "4.5"; } && { verlt "${kversion}" "4.8"; } ; then
 500         # Kernels between v4.5 and v4.8 built with gcc >= 8 on arm will hit an
 501         # assembler error :
 502         #
 503         #  kernel/.tmp_fork.s: Assembler messages:
 504         #  kernel/.tmp_fork.s:1790: Error: .err encountered
 505         #
 506         # @see https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85745
 507         #
 508         patch_linux_kernel 9f73bd8bb445e0cbe4bcef6d4cfc788f1e184007
 509     fi
 510
 511     if ( { vergte "${kversion}" "4.4"; } && { verlt "${kversion}" "4.4.136"; } ) ||
 512        ( { vergte "${kversion}" "4.5"; } && { verlt "${kversion}" "4.8"; } ); then
 513         # Hacky patch to deal with the following build error:
 514         #   Cannot find symbol for section 7: .text.unlikely.
 515         #   kernel/kexec_file.o: failed
 516         #   make[1]: *** [scripts/Makefile.build:291: kernel/kexec_file.o] Error 1
 517         #
 518         # This error happens with binutils 2.36 and 2.37, but should probably not
 519         # be an issue with binutils 2.38.
 520         # @see https://github.com/linuxppc/issues/issues/388
 521         # @see https://github.com/bminor/binutils-gdb/commit/c09c8b42021180eee9495bd50d8b35e683d3901b
 522         #
 523         # There is some sort of config (unspecified in past discussions) which
 524         # provokes the error, and there was never a potential fix merged in
 525         # this discussion, in part because the build systems of the kernel
 526         # switched to objtool instead.
 527         #
 528         # @see https://lore.kernel.org/all/20210215162209.5e2a475b@gandalf.local.home/
 529         #
 530         sed -i 's/return txtname;/return shdr0->sh_size ? txtname : NULL;/' scripts/recordmcount.h
 531
 532         # After applying the above patch, the build continues but fails with
 533         # head64.c:(.text.exit+0x5): undefined reference to `__gcov_exit'
 534         #
 535         scripts/config --disable CONFIG_GCOV_KERNEL
 536     fi
 537
 538     if { vergte "${kversion}" "4.5"; } && { verlt "${kversion}" "4.5.5"; } ; then
 539         # drivers/staging/wilc1000/wilc_spi.c:123:34: error: storage size of ‘wilc1000_spi_ops’ isn’t known
 540         patch_linux_kernel ce7b516f3f9e11fe4ee06fad0d7e853bb6e8f160
 541     fi
 542
 543     # Newer binutils don't accept 3 operand 'cmp' instructions on ppc64
 544     # Convert them to 'cmpw' which was previously done silently
 545     if verlt "$kversion" "4.9"; then
 546         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/"
 547         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/"
 548         sed -i "s/\$pie \-o \"\$ofile\"/\$pie --no-dynamic-linker -o \"\$ofile\"/" arch/powerpc/boot/wrapper
 549     fi
 550
 551     if [ "$(scripts/config --state CONFIG_EXTCON_ADC_JACK)" != "n" ] &&
 552            ( { vergte "${kversion}" "4.2"; } && { verlt "${kversion}" "4.12"; } ); then
 553         # 73b6ecdb93e8e77752cae9077c424fcdc6f23c39 introduced a change where
 554         # extcon-adc-jack.h has an incompatible pointer type.
 555         # In GCC >= 5 this will provoke a warning and build failure.
 556         # Eg.
 557         #   drivers/extcon/extcon-adc-jack.c: In function ‘adc_jack_probe’:
 558         #   drivers/extcon/extcon-adc-jack.c:111:64: error: passing argument 2 of ‘devm_extcon_dev_allocate’ from incompatible pointer type [-Werror=incompatible-pointer-types]
 559         #   make[2]: *** [scripts/Makefile.build:295: drivers/extcon/extcon-adc-jack.o] Error 1
 560         #
 561         # 8a522bf2d4f788306443d36b26b54f0aedcdfdbe (in 4.11) has a fix for this warning
 562         #
 563         patch_linux_kernel 8a522bf2d4f788306443d36b26b54f0aedcdfdbe
 564     fi
 565
 566     if ( { vergte "${kversion}" "4.15"; } && { verlt "${kversion}" "4.15.2"; } ) || \
 567        ( { vergte "${kversion}" "4.14"; } && { verlt "${kversion}" "4.14.18"; } ) ; then
 568         # Fix an objtool Segmentation fault
 569         patch_linux_kernel dd12561854824fd1f05baf2a1b794faa046e2425
 570     fi
 571
 572     if { vergte "${kversion}" "4.14"; } && { verlt "${kversion}" "4.14.268"; } ; then
 573         # Builds fail due to -Werror=use-after-free in sigchain.o and help.o
 574         patch_linux_kernel e89bb266b710ce056f141f29f091fd468a4a8185
 575     fi
 576
 577     # Fix a typo in v2.6.36.x
 578     if [ -f "arch/x86/kernel/entry_64.S" ]; then
 579       sed -i 's/END(do_hypervisor_callback)/END(xen_do_hypervisor_callback)/' arch/x86/kernel/entry_64.S
 580     fi
 581
 582     # Fix compiler switch in vdso Makefile for 2.6.36 to 2.6.36.2
 583     if { vergte "$kversion" "2.6.36" && verlte "$kversion" "2.6.36.3"; }; then
 584       sed -i 's/-m elf_x86_64/-m64/' arch/x86/vdso/Makefile
 585       sed -i 's/-m elf_i386/-m32/' arch/x86/vdso/Makefile
 586     fi
 587
 588     # Fix kernel < 3.0 with gcc >= 4.7
 589     if verlt "$kversion" "3.0"; then
 590       sed -i '/linux\/compiler.h/a #include <linux\/linkage.h> \/* For asmregparm *\/' arch/x86/include/asm/ptrace.h
 591       sed -i 's/extern long syscall_trace_enter/extern asmregparm long syscall_trace_enter/' arch/x86/include/asm/ptrace.h
 592       sed -i 's/extern void syscall_trace_leave/extern asmregparm void syscall_trace_leave/' arch/x86/include/asm/ptrace.h
 593       echo "header-y += linkage.h" >> include/linux/Kbuild
 594     fi
 595
 596     if [ "${cross_arch}" = "powerpc" ] ; then
 597         if { vergte "${kversion}" "4.15"; } && { verlt "${kversion}" "4.16"; } ; then
 598             # Avoid register errors such as
 599             # aes_generic.c:(.text+0x4e0): undefined reference to `_restgpr_31_x'
 600             # @see https://gitlab.com/linux-kernel/stable/-/commit/148b974deea927f5dbb6c468af2707b488bfa2de
 601             make_args+=(
 602                 CFLAGS_aes_generic.o=''
 603             )
 604         fi
 605     fi
 606
 607     if [ "$(scripts/config --state CONFIG_DEBUG_INFO_BTF)" == "y" ] &&
 608            { vergte "${pahole_version}" "1.24"; } &&
 609            { vergte "${kversion}" "5.10"; } && { verlt "${kversion}" "6.0"; } ;then
 610         # Some kernels Eg. Ubuntu-hwe-5.13-5.13.0-52.59_20.04.1
 611         # fail with the following error:
 612         #   BTFIDS  vmlinux
 613         #   FAILED: load BTF from vmlinux: Invalid argument
 614         #
 615         # When CONFIG_DEBUG_INFO_BTF is set, certain versions of pahole require
 616         # `--skip_encoding_btf_enum64` to be passed as the kernel doesn't define
 617         # BTF_KIND_ENUM64.
 618         #
 619         # Introduced in 341dfcf8d78eaa3a2dc96dea06f0392eb2978364 (~v5.10)
 620         # @see https://lore.kernel.org/bpf/20220825171620.cioobudss6ovyrkc@altlinux.org/t/
 621         #
 622         if [ -f "scripts/pahole-flags.sh" ] ; then
 623             # shellcheck disable=SC2016
 624             sed -i 's/ -J ${PAHOLE_FLAGS} / -J ${PAHOLE_FLAGS} --skip_encoding_btf_enum64 /' scripts/link-vmlinux.sh
 625         else
 626             # shellcheck disable=SC2016
 627             sed -i 's/ -J ${extra_paholeopt} / -J ${extra_paholeopt} --skip_encoding_btf_enum64 /' scripts/link-vmlinux.sh
 628         fi
 629     fi
 630
 631     # GCC 4.8
 632     if [ "$HOSTCC" == "gcc-4.8" ]; then
 633         scripts/config --disable CONFIG_CC_STACKPROTECTOR_STRONG
 634         scripts/config --disable CONFIG_PPC_OF_BOOT_TRAMPOLINE
 635     fi
 636
 637     # Don't try to sign modules
 638     scripts/config --disable CONFIG_MODULE_SIG
 639
 640     # Disable kernel stack frame correctness validation, introduced in 4.6.0 and currently fails
 641     scripts/config --disable CONFIG_STACK_VALIDATION
 642
 643     # Cause problems with inline assembly on i386
 644     scripts/config --disable CONFIG_DEBUG_SECTION_MISMATCH
 645
 646     # Don't build samples, they are broken on some kernel releases
 647     scripts/config --disable CONFIG_SAMPLES
 648     scripts/config --disable CONFIG_BUILD_DOCSRC
 649
 650     # Disable kcov
 651     scripts/config --disable CONFIG_KCOV
 652
 653     # Broken on some RT kernels
 654     scripts/config --disable CONFIG_HYPERV
 655
 656     # Broken drivers
 657     scripts/config --disable CONFIG_RAPIDIO_TSI721
 658     scripts/config --disable CONFIG_SGI_XP
 659     scripts/config --disable CONFIG_MFD_WM8994
 660     scripts/config --disable CONFIG_DRM_RADEON
 661     scripts/config --disable CONFIG_SND_SOC_WM5100
 662     # More recent compiler optimizations (from gcc 8 onwards )expose build errors
 663     # with netronome on older kernels.
 664     # Observed in 4.11-rt, 4.15-4.17, 5.0-rt - 5.16-rt
 665     # It seems easier to disable the driver than to attempt patching.
 666     # Eg.
 667     #   In function ‘ur_load_imm_any’,
 668     #   inlined from ‘jeq_imm’ at drivers/net/ethernet/netronome/nfp/bpf/jit.c:3146:13:
 669     #   ./include/linux/compiler.h:350:45: error: call to ‘__compiletime_assert_1062’ declared with attribute error: FIELD_FIT: value too large for the field
 670     #   350 |         _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
 671     #
 672     scripts/config --disable CONFIG_NET_VENDOR_NETRONOME
 673     # Eg.
 674     #  In function ‘memcpy’,
 675     #  inlined from ‘kszphy_get_strings’ at drivers/net/phy/micrel.c:664:3:
 676     #  ./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
 677     #  305 |                         __read_overflow2();
 678     #      |                         ^~~~~~~~~~~~~~~~~~
 679     #  make[3]: *** [scripts/Makefile.build:308: drivers/net/phy/micrel.o] Error 1
 680     #
 681     scripts/config --disable CONFIG_MICREL_PHY
 682
 683
 684     # IGBVF won't build with recent gcc on 2.6.38.x
 685     if { vergte "$kversion" "2.6.37" && verlt "$kversion" "2.6.38"; }; then
 686       scripts/config --disable CONFIG_IGBVF
 687     fi
 688
 689     # Don't fail the build on warnings
 690     scripts/config --disable CONFIG_WERROR
 691     scripts/config --enable CONFIG_PPC_DISABLE_WERROR
 692
 693     # Set required options
 694     scripts/config --enable CONFIG_TRACEPOINTS
 695     scripts/config --enable CONFIG_KALLSYMS
 696     scripts/config --enable CONFIG_HIGH_RES_TIMERS
 697     scripts/config --enable CONFIG_KPROBES
 698     scripts/config --enable CONFIG_FTRACE
 699     scripts/config --enable CONFIG_BLK_DEV_IO_TRACE
 700     scripts/config --enable CONFIG_KALLSYMS_ALL
 701     scripts/config --enable CONFIG_HAVE_SYSCALL_TRACEPOINTS
 702     scripts/config --enable CONFIG_PERF_EVENTS
 703     scripts/config --enable CONFIG_EVENT_TRACING
 704     scripts/config --enable CONFIG_KRETPROBES
 705
 706     if [ -n "${DEBUG}" ] ; then
 707         cat .config
 708     fi
 709
 710     make "$update_conf_target" "${make_args[@]}"
 711     make -j"$NPROC" "${make_args[@]}"
 712
 713     krelease=$(make -s kernelrelease "${make_args[@]}")
 714
 715     # Save the kernel and modules
 716     mkdir -p "$LINUX_INSTOBJ_DIR/boot"
 717     make INSTALL_MOD_PATH="$LINUX_INSTOBJ_DIR" INSTALL_MOD_STRIP=1 modules_install "${make_args[@]}"
 718     make INSTALL_MOD_PATH="$LINUX_INSTOBJ_DIR" INSTALL_PATH="$LINUX_INSTOBJ_DIR/boot" install "${make_args[@]}"
 719     rm -f "$LINUX_INSTOBJ_DIR/lib/modules/${krelease}/source" "$LINUX_INSTOBJ_DIR/lib/modules/${krelease}/build"
 720     ln -s ../../../../sources "$LINUX_INSTOBJ_DIR/lib/modules/${krelease}/source"
 721     ln -s ../../../../sources "$LINUX_INSTOBJ_DIR/lib/modules/${krelease}/source"
 722 }
 723
 724
 725 extract_distro_headers() {
 726
 727     # Enter linux source dir
 728     cd "${LINUX_SRCOBJ_DIR}"
 729
 730
 731     # For RT kernels, copy version file
 732     if [ -s localversion-rt ]; then
 733         cp -a localversion-rt "${LINUX_HDROBJ_DIR}"
 734     fi
 735
 736     # Copy all Makefile related stuff
 737     find . -path './include/*' -prune \
 738         -o -path './scripts/*' -prune -o -type f \
 739         \( -name 'Makefile*' -o -name 'Kconfig*' -o -name 'Kbuild*' -o \
 740             -name '*.sh' -o -name '*.pl' -o -name '*.lds' \) \
 741         -print | cpio -pd --preserve-modification-time "${LINUX_HDROBJ_DIR}"
 742
 743     # Copy base scripts and include dirs
 744     cp -a scripts include "${LINUX_HDROBJ_DIR}"
 745
 746     # Copy arch includes
 747     (find arch -name include -type d -print0 | \
 748         xargs -0 -n1 -I '{}' find '{}' -type f) | \
 749         cpio -pd --preserve-modification-time "${LINUX_HDROBJ_DIR}"
 750
 751     # Copy arch scripts
 752     (find arch -name scripts -type d -print0 | \
 753         xargs -0 -n1 -I '{}' find '{}' -type f) | \
 754         cpio -pd --preserve-modification-time "${LINUX_HDROBJ_DIR}"
 755
 756     # Cleanup scripts
 757     rm -f "${LINUX_HDROBJ_DIR}/scripts/*.o"
 758     rm -f "${LINUX_HDROBJ_DIR}/scripts/*/*.o"
 759
 760     # On powerpc 32bits this object is required to link modules
 761     if [ "${karch}" = "powerpc" ]; then
 762         if [ "$(scripts/config -s CONFIG_PPC64)" = "y" ] && vergte "${kversion}" "5.4"; then
 763             :
 764         else
 765             cp -a --parents arch/powerpc/lib/crtsavres.[So] "${LINUX_HDROBJ_DIR}/"
 766         fi
 767     fi
 768
 769     # On arm64 between 4.13 and 1.15 this object is required to build with ftrace support
 770     if [ "${karch}" = "arm64" ]; then
 771         if [ -f "arch/arm64/kernel/ftrace-mod.S" ]; then
 772             cp -a --parents arch/arm64/kernel/ftrace-mod.[So] "${LINUX_HDROBJ_DIR}/"
 773         fi
 774     fi
 775
 776     # Newer kernels need objtool to build modules when CONFIG_STACK_VALIDATION=y
 777     if [ -f tools/objtool/objtool ]; then
 778       cp -a --parents tools/objtool/objtool "${LINUX_HDROBJ_DIR}/"
 779     fi
 780
 781     if [ -f "arch/x86/kernel/macros.s" ]; then
 782       cp -a --parents arch/x86/kernel/macros.s "${LINUX_HDROBJ_DIR}/"
 783     fi
 784
 785     # Copy modules related stuff, if available
 786     if [ -s Module.symvers ]; then
 787         cp Module.symvers "${LINUX_HDROBJ_DIR}"
 788     fi
 789
 790     if [ -s System.map ]; then
 791         cp System.map "${LINUX_HDROBJ_DIR}"
 792     fi
 793
 794     if [ -s Module.markers ]; then
 795         cp Module.markers "${LINUX_HDROBJ_DIR}"
 796     fi
 797
 798     # Copy config file
 799     cp .config "${LINUX_HDROBJ_DIR}"
 800
 801     # Make sure the Makefile and version.h have a matching timestamp so that
 802     # external modules can be built
 803     if [ -s "${LINUX_HDROBJ_DIR}/include/generated/uapi/linux/version.h" ]; then
 804         touch -r "${LINUX_HDROBJ_DIR}/Makefile" "${LINUX_HDROBJ_DIR}/include/generated/uapi/linux/version.h"
 805     elif [ -s "${LINUX_HDROBJ_DIR}/include/linux/version.h" ]; then
 806         touch -r "${LINUX_HDROBJ_DIR}/Makefile" "${LINUX_HDROBJ_DIR}/include/linux/version.h"
 807     else
 808         echo "Missing version.h"
 809         exit 1
 810     fi
 811     touch -r "${LINUX_HDROBJ_DIR}/.config" "${LINUX_HDROBJ_DIR}/include/generated/autoconf.h"
 812
 813     # Copy .config to include/config/auto.conf so "make prepare" is unnecessary.
 814     if [ ! -f "${LINUX_HDROBJ_DIR}/include/config/auto.conf" ]; then
 815         cp "${LINUX_HDROBJ_DIR}/.config" "${LINUX_HDROBJ_DIR}/include/config/auto.conf"
 816     fi
 817
 818     # Finally clean the object files from the full source tree
 819     make clean
 820
 821     # And regen the modules support files
 822     make modules_prepare "${make_args[@]}"
 823
 824     # On powerpc 32bits this object is required to link modules
 825     if [ "${karch}" = "powerpc" ]; then
 826         if [ "$(scripts/config -s CONFIG_PPC64)" = "y" ] && vergte "${kversion}" "5.4"; then
 827             :
 828         else
 829             make arch/powerpc/lib/crtsavres.o "${make_args[@]}"
 830         fi
 831     fi
 832
 833     # On arm64 between 4.13 and 4.15 this object is required to build with ftrace support
 834     if [ "${karch}" = "arm64" ]; then
 835         if [ -f "arch/arm64/kernel/ftrace-mod.S" ]; then
 836             make arch/arm64/kernel/ftrace-mod.o "${make_args[@]}"
 837         fi
 838     fi
 839
 840     # Version specific tasks
 841     case "$ktag" in
 842       Ubuntu*)
 843         # Add Ubuntu ABI number to kernel headers, this is normally done by the packaging code
 844         ABINUM="$(echo "$ktag" | grep -P -o 'Ubuntu-(lts-)?.*-\K\d+(?=\..*)')"
 845         echo "#define UTS_UBUNTU_RELEASE_ABI $ABINUM" >> include/generated/utsrelease.h
 846         echo "#define UTS_UBUNTU_RELEASE_ABI $ABINUM" >> "${LINUX_HDROBJ_DIR}/include/generated/utsrelease.h"
 847         ;;
 848     esac
 849 }
 850
 851
 852 build_modules() {
 853
 854     local kdir="$1"
 855     local outdir="$2"
 856     local kversion
 857
 858     kversion=$(make -C "$LINUX_HDROBJ_DIR" -s kernelversion)
 859
 860     # Try to catch some compatibility problems by turning some
 861     # warnings into errors.
 862     #export KCFLAGS="$KCFLAGS -Wall -Werror"
 863
 864     # Enter lttng-modules source dir
 865     cd "${MODULES_GIT_DIR}"
 866
 867     # kernels 3.10 to 3.10.13 and 3.11 to 3.11.2 introduce a deadlock in the
 868     # timekeeping subsystem. We want those build to fail.
 869     if { vergte "$kversion" "3.10" && verlte "$kversion" "3.10.13"; } || \
 870        { vergte "$kversion" "3.11" && verlte "$kversion" "3.11.2"; }; then
 871
 872         set +e
 873
 874         # Build modules
 875         KERNELDIR="${kdir}" make -j"${NPROC}" V=1 "${make_args[@]}"
 876         ret=$?
 877
 878         set -e
 879
 880         # We expect this build to fail, if it doesn't, fail the job.
 881         if [ "$ret" -eq 0 ]; then
 882             echo "This build should have failed."
 883             exit 1
 884         fi
 885
 886         # We have to publish at least one file or the build will fail
 887         echo "This kernel is broken, there is a deadlock in the timekeeping subsystem." > "${outdir}/BROKEN.txt.ko"
 888
 889         KERNELDIR="${kdir}" make clean
 890
 891     else # Regular build
 892
 893         # Build modules against full kernel sources
 894         KERNELDIR="${kdir}" make -j"${NPROC}" V=1 "${make_args[@]}"
 895
 896         # Install modules to build dir
 897         KERNELDIR="${kdir}" make INSTALL_MOD_PATH="${outdir}" modules_install
 898
 899         # Clean build dir
 900         KERNELDIR="${kdir}" make clean
 901     fi
 902 }
 903
 904
 905 ## MAIN ##
 906
 907 # Use all CPU cores
 908 NPROC=$(nproc)
 909
 910 MODULES_GIT_DIR="${WORKSPACE}/src/lttng-modules"
 911 LINUX_GIT_DIR="${WORKSPACE}/src/linux"
 912
 913 LINUX_OBJ_DIR="${WORKSPACE}/linux"
 914 LINUX_SRCOBJ_DIR="${LINUX_OBJ_DIR}/sources"
 915 LINUX_HDROBJ_DIR="${LINUX_OBJ_DIR}/headers"
 916 LINUX_INSTOBJ_DIR="${LINUX_OBJ_DIR}/install"
 917
 918 MODULES_OUTPUT_KSRC_DIR="${WORKSPACE}/build/lttng-modules-ksrc"
 919 MODULES_OUTPUT_KHDR_DIR="${WORKSPACE}/build/lttng-modules-khdr"
 920
 921 LINUX_GIT_REF_REPO_DIR="$HOME/gitcache/linux-stable.git/"
 922
 923 OBJ_STORE_URL="s3://jenkins"
 924
 925 cd "$WORKSPACE"
 926
 927 # Create build directories
 928 mkdir -p "${LINUX_SRCOBJ_DIR}" "${LINUX_HDROBJ_DIR}" "${LINUX_INSTOBJ_DIR}" "${MODULES_OUTPUT_KSRC_DIR}" "${MODULES_OUTPUT_KHDR_DIR}"
 929
 930 print_header "Clone LTTng-modules sources"
 931 git_clone_modules_sources
 932
 933 # Setup cross compile env if available
 934 if [ "x${cross_arch}" != "x" ]; then
 935
 936     case "$cross_arch" in
 937         "armhf")
 938             karch="arm"
 939             cross_compile="arm-linux-gnueabihf-"
 940             vanilla_config="imx_v6_v7_defconfig"
 941             ubuntu_config="armhf-config.flavour.generic"
 942             ;;
 943
 944         "arm64")
 945             karch="arm64"
 946             cross_compile="aarch64-linux-gnu-"
 947             vanilla_config="defconfig"
 948             ubuntu_config="arm64-config.flavour.generic"
 949             ;;
 950
 951         "powerpc")
 952             karch="powerpc"
 953             cross_compile="powerpc-linux-gnu-"
 954             vanilla_config="ppc44x_defconfig"
 955             ubuntu_config="powerpc-config.flavour.powerpc-smp"
 956             ;;
 957
 958         "ppc64el")
 959             karch="powerpc"
 960             cross_compile="powerpc64le-linux-gnu-"
 961             vanilla_config="pseries_le_defconfig"
 962             ubuntu_config="ppc64el-config.flavour.generic"
 963             ;;
 964
 965         *)
 966             echo "Unsupported cross arch $cross_arch"
 967             exit 1
 968             ;;
 969     esac
 970
 971     # Export variables used by Kbuild for cross compilation
 972     export ARCH="${karch}"
 973     export CROSS_COMPILE="${cross_compile}"
 974
 975 # Set arch specific values if we are not cross compiling
 976 elif [ "x${arch}" != "x" ]; then
 977
 978     case "$arch" in
 979         "i386")
 980             karch="x86"
 981             vanilla_config="allmodconfig"
 982             ubuntu_config="i386-config.flavour.generic"
 983             ;;
 984
 985         "amd64")
 986             karch="x86"
 987             vanilla_config="allmodconfig"
 988             ubuntu_config="amd64-config.flavour.generic"
 989             ;;
 990
 991         "armhf")
 992             karch="arm"
 993             vanilla_config="allmodconfig"
 994             ubuntu_config="armhf-config.flavour.generic"
 995             ;;
 996
 997         "arm64")
 998             karch="arm64"
 999             vanilla_config="allmodconfig"
1000             ubuntu_config="arm64-config.flavour.generic"
1001             ;;
1002
1003         "powerpc")
1004             karch="powerpc"
1005             vanilla_config="allmodconfig"
1006             ubuntu_config="powerpc-config.flavour.powerpc-smp"
1007             ;;
1008
1009         "ppc64el")
1010             karch="powerpc"
1011             vanilla_config="allmodconfig"
1012             ubuntu_config="ppc64el-config.flavour.generic"
1013             ;;
1014
1015         *)
1016             echo "Unsupported arch $arch"
1017             exit 1
1018             ;;
1019     esac
1020 else
1021     echo "No arch or cross_arch specified"
1022     exit 1
1023 fi
1024
1025
1026
1027 # First get the kernel build from the object store, or build it, if it's
1028 # not available.
1029
1030 set +x
1031 echo "# Setup endpoint
1032 host_base = obj.internal.efficios.com
1033 host_bucket = obj.internal.efficios.com
1034 bucket_location = us-east-1
1035 use_https = True
1036
1037 # Setup access keys
1038 access_key = jenkins
1039 secret_key = echo123456
1040
1041 # Enable S3 v4 signature APIs
1042 signature_v2 = False" > "$WORKSPACE/.s3cfg"
1043 set -x
1044
1045 url_hash="$(echo -n "$kgitrepo" | md5sum | awk '{ print $1 }')"
1046 obj_name="linux.tar.bz2"
1047
1048 if [ -z "${cross_arch}" ]; then
1049     obj_url_prefix="$OBJ_STORE_URL/linux-build/$url_hash/$ktag/platform-${platform}/$arch/native"
1050 else
1051     obj_url_prefix="$OBJ_STORE_URL/linux-build/$url_hash/$ktag/platform-${platform}/${cross_arch}"
1052 fi
1053
1054 obj_url="$obj_url_prefix/$obj_name"
1055
1056 set +e
1057 # In s3cmd 2.3, the return code of get when an object does not exist (64)
1058 # is different than in 2.2 (12). The return codes of 's3cmd info' are
1059 # consistent between 2.2 and 2.3.
1060 s3cmd -c "$WORKSPACE/.s3cfg" info "$obj_url"
1061 ret=$?
1062 set -e
1063
1064 case "$ret" in
1065     "0")
1066       print_header "Get sources and prebuilt kernel"
1067       s3cmd -c "$WORKSPACE/.s3cfg" get "$obj_url"
1068       extract_archive_obj
1069
1070       print_header "Select compiler and set build flags"
1071       select_compiler
1072       export_kbuild_flags
1073       ;;
1074
1075     "12")
1076       print_header "Clone kernel sources"
1077
1078       # Build all the things and upload
1079       # then finish the module build...
1080
1081       git_clone_linux_sources
1082       git_export_linux_sources
1083
1084       print_header "Select compiler and set build flags"
1085       select_compiler
1086       export_kbuild_flags
1087
1088       ## PREPARE FULL LINUX SOURCE TREE
1089       print_header "Build kernel from source"
1090       build_linux_kernel
1091
1092       ## EXTRACT DISTRO STYLE KERNEL HEADERS / DEVEL
1093       extract_distro_headers
1094
1095       print_header "Upload kernel to object storage"
1096       tar_archive_obj
1097       upload_archive_obj
1098
1099       ;;
1100
1101     *)
1102       echo "Unknown error? Abort"
1103       exit 1
1104       ;;
1105 esac
1106
1107
1108 ## BUILD modules
1109 # Either we downloaded a pre-build kernel or we built it and uploaded
1110 # the archive for future builds.
1111
1112 cd "$WORKSPACE"
1113
1114 print_header "Build modules against full kernel sources"
1115 build_modules "${LINUX_SRCOBJ_DIR}" "${MODULES_OUTPUT_KSRC_DIR}"
1116
1117 print_header "Build modules against kernel headers"
1118 build_modules "${LINUX_HDROBJ_DIR}" "${MODULES_OUTPUT_KHDR_DIR}"
1119
1120
1121 print_header "Check for built modules in install directory"
1122
1123 # Make sure some modules were actually built
1124 tree "${MODULES_OUTPUT_KSRC_DIR}"
1125 if [ "x$(find "${MODULES_OUTPUT_KSRC_DIR}" -name '*.ko*' -printf yes -quit)" != "xyes" ]; then
1126   echo "No modules built!"
1127   exit 1
1128 fi
1129
1130 tree "${MODULES_OUTPUT_KHDR_DIR}"
1131 if [ "x$(find "${MODULES_OUTPUT_KHDR_DIR}" -name '*.ko*' -printf yes -quit)" != "xyes" ]; then
1132   echo "No modules built!"
1133   exit 1
1134 fi
1135
1136 # EOF