X-Git-Url: http://git.liburcu.org/?a=blobdiff_plain;f=scripts%2Flttng-modules%2Fparam-build.sh;h=5ee567175d130117c232638bf83abb52ee5b1d2d;hb=4d8b6258f7114a89e76162fb037912e3ee034d34;hp=ab604a99832df813381bf052424e0356b4c6e724;hpb=447eaf93d4d6fbb76c0dc5703929969e4a7fef59;p=lttng-ci.git diff --git a/scripts/lttng-modules/param-build.sh b/scripts/lttng-modules/param-build.sh index ab604a9..5ee5671 100644 --- a/scripts/lttng-modules/param-build.sh +++ b/scripts/lttng-modules/param-build.sh @@ -1,6 +1,6 @@ #!/bin/bash # -# Copyright (C) 2016-2019 Michael Jeanson +# Copyright (C) 2016-2023 Michael Jeanson # # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by @@ -18,22 +18,27 @@ set -exu # Parameters -platforms=${platforms:-} +platform=${platforms:-} +cross_arch=${cross_arch:-} +ktag=${ktag:-} +kgitrepo=${kgitrepo:-} +mversion=${mversion:-} +mgitrepo=${mgitrepo:-} +make_args=() + +DEBUG=${DEBUG:-} + # Derive arch from label if it isn't set if [ -z "${arch:-}" ] ; then # Labels may be platform specific, eg. jammy-amd64, deb12-armhf regex='[[:alnum:]]+-([[:alnum:]]+)' - if [[ "${platforms}" =~ ${regex} ]] ; then + if [[ "${platform}" =~ ${regex} ]] ; then arch="${BASH_REMATCH[1]}" else - arch="${platforms:-}" + arch="${platform:-}" fi fi -cross_arch=${cross_arch:-} -ktag=${ktag:-} -kgitrepo=${kgitrepo:-} -mversion=${mversion:-} -mgitrepo=${mgitrepo:-} + ## FUNCTIONS ## @@ -56,6 +61,24 @@ vergt() { [ "$1" = "$2" ] && return 1 || vergte "$1" "$2" } +print_header() { + set +x + + local message=" $1 " + local message_len + local padding_len + + message_len="${#message}" + padding_len=$(( (80 - (message_len)) / 2 )) + + printf '\n'; printf -- '#%.0s' {1..80}; printf '\n' + printf -- '-%.0s' {1..80}; printf '\n' + printf -- '#%.0s' $(seq 1 $padding_len); printf '%s' "$message"; printf -- '#%.0s' $(seq 1 $padding_len); printf '\n' + printf -- '-%.0s' {1..80}; printf '\n' + printf -- '#%.0s' {1..80}; printf '\n\n' + + set -x +} git_clone_modules_sources() { mkdir -p "$MODULES_GIT_DIR" @@ -92,7 +115,7 @@ upload_archive_obj() { extract_archive_obj() { - tar -xf "$WORKSPACE/$obj_name" -C "$LINUX_OBJ_DIR" + tar -xf "$WORKSPACE/$obj_name" -C "$LINUX_OBJ_DIR" -I pbzip2 rm -f "$WORKSPACE/$obj_name" } @@ -103,6 +126,7 @@ tar_archive_obj() { cd - } +# List all GCC versions present in the PATH list_gccs() { local gccs gccs=() @@ -115,67 +139,193 @@ list_gccs() { # Find the most recent GCC version supported by the kernel sources select_compiler() { - local selected_cc + # Enter linux source dir cd "$LINUX_SRCOBJ_DIR" - kversion=$(make -s kernelversion) + # Get the kernel version using the host toolchain, some cross-compiled arch may be broken + kversion=$(unset ARCH; unset CROSS_COMPILE; make -s kernelversion) - set +e + if [ "${cross_arch}" = "riscv64" ] && verlt "${kversion}" "5.12"; then + echo "RISC-V support was upstreamed in kernel v4.19 but kprobes support was only added in v5.12. Don't try to build it." + exit 0 + fi - for cc in $(list_gccs) ; do - if "${CROSS_COMPILE:-}${cc}" -I include/ -D__LINUX_COMPILER_H -D__LINUX_COMPILER_TYPES_H -E include/linux/compiler-gcc.h; then - selected_cc="$cc" - break - fi - done + if [ "${cross_arch}" = "arm64" ] && verlt "${kversion}" "3.7"; then + echo "ARM64 support was added as of v3.7. Don't try to build it." + exit 0 + fi - set -e + if [ "${cross_arch}" = "arm64" ] && verlt "${kversion}" "3.18"; then + echo "lttng-modules requires gcc >= 5.1 for ARM64 due to compiler bugs in gcc." + echo "gcc-5 support was added to the kernel as of v3.18. Don't this to build it." + exit 0 + fi - if [ "x$selected_cc" = "x" ]; then + if { verlt "$kversion" "4.4"; }; then + # Force gcc-4.8 for kernels before 4.4 + selected_cc='gcc-4.8' + # Due to compiler bugs in gcc on arm64, lttng-modules disallows + # compilation with gcc < 5.1. + if [[ "${cross_arch}" == "arm64" ]] ; then + selected_cc='gcc-5.5' + export PATH="${PATH:-}:/usr/local/gcc5.5/bin" + export LD_LIBRARY_PATH="${LD_LIBRARY_PATH:-}:/usr/local/gcc5.5/lib" + fi + selected_cc_version=$(echo "${selected_cc}" | cut -d'-' -f2) + else + for cc in $(list_gccs) ; do + if "${CROSS_COMPILE:-}${cc}" -I include/ -D__LINUX_COMPILER_H -D__LINUX_COMPILER_TYPES_H -E include/linux/compiler-gcc.h; then + cc_version=$(echo "${cc}" | cut -d'-' -f2) + if { verlt "${kversion}" "5.17"; } && { vergt "${cc_version}" "11"; } ; then + # Using gcc-12+ with '-Wuse-after-free' breaks the build of older + # kernels (in particular, objtool). Some releases on LTS + # branches between 4.x and 5.15 can be built with gcc-12. + # @see https://lore.kernel.org/lkml/20494.1643237814@turing-police/ + # @see https://gitlab.com/linux-kernel/stable/-/commit/52a9dab6d892763b2a8334a568bd4e2c1a6fde66 + continue + fi + selected_cc="$cc" + selected_cc_version="$cc_version" + break + fi + done + fi + + if [ -z "$selected_cc" ]; then echo "Found no suitable compiler." exit 1 fi - # Force gcc-4.8 for kernels before 3.18 - if { verlt "$kversion" "3.18"; }; then - selected_cc=gcc-4.8 + # lttng-modules requires gcc >= 5.1 for aarch64 + # @see https://github.com/lttng/lttng-modules/commit/be06402dbdbea2f3394e60ec15c5d3356e2be416 + if { verlt "${selected_cc_version}" "5.1"; } && [ "${cross_arch}" = "arm64" ] ; then + echo "Building lttng-modules on aarch64 requires gcc >= 5.1" + exit 1 fi - if [ "$selected_cc" != "gcc-4.8" ]; then + cd - +} + +export_kbuild_flags() { + local _KAFLAGS + local _KCFLAGS + local _KCPPFLAGS + local _HOSTCFLAGS + + _KAFLAGS=() + _KCFLAGS=() + _KCPPFLAGS=() + _HOSTCFLAGS=() + + if { vergte "$selected_cc_version" "6"; }; then # Older kernel Makefiles do not expect the compiler to default to PIE - KAFLAGS="-fno-pie" - KCFLAGS="-fno-pie -no-pie -fno-stack-protector" - KCPPFLAGS="-fno-pie" - export KAFLAGS KCFLAGS KCPPFLAGS + _KAFLAGS+=(-fno-pie) + _KCFLAGS+=( + -fno-pie + -no-pie + -fno-stack-protector + ) + _KCPPFLAGS+=(-fno-pie) fi + if { vergte "${selected_cc_version}" "10"; } && { verlt "${kversion}" "5.10"; } ; then + # gcc-10 changed the default from '-fcommon' to '-fno-common', which + # causes a linker failure. '-fcommon' can be set on the HOSTCFLAGS + # to avoid the issue. + # @see https://gitlab.com/linux-kernel/stable/-/commit/e33a814e772cdc36436c8c188d8c42d019fda639 + _HOSTCFLAGS+=(-fcommon) + fi + + if { verlt "${kversion}" "5.14"; } && [ "${cross_arch:-}" == "armhf" ] ; then + # Work-around for producing instructions that aren't valid for the + # default architectures. + # Eg. Error: selected processor does not support `cpsid i' in ARM mode + _KCFLAGS+=(-march=armv7-a -mfpu=vfpv3-d16) + _KCPPFLAGS+=(-march=armv7-a -mfpu=vfpv3-d16) + fi + + if { vergt "${selected_cc_version}" "8"; } && { vergte "${kversion}" "4.15"; } && { verlt "${kversion}" "4.17"; } ; then + # This was added to -Wall in gcc 9 but some kernels do not include the fixes + # @see https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88583 + _KCFLAGS+=(-Wno-error=packed-not-aligned) + fi + + export KAFLAGS="${_KAFLAGS[*]}" + export KCFLAGS="${_KCFLAGS[*]}" + export KCPPFLAGS="${_KCPPFLAGS[*]}" + export HOSTCFLAGS="${_HOSTCFLAGS[*]}" export CC="${CROSS_COMPILE:-}${selected_cc}" export HOSTCC="${selected_cc}" - cd - + make_args=( + CC="${CC}" + HOSTCC="${HOSTCC}" + HOSTCFLAGS="${HOSTCFLAGS:-}" + ) + + if [ -n "${DEBUG}" ] ; then + make_args+=( + V=1 + ) + fi } +patch_linux_kernel() { + local commit_hash + commit_hash="$1" + + # Show the title of the patch in the build log + git -C "${LINUX_GIT_REF_REPO_DIR}" show --oneline -s "${commit_hash}" + + # Apply patch, don't fail if it doesn't apply cleanly + set +e + git -C "${LINUX_GIT_REF_REPO_DIR}" format-patch -n1 --stdout "${commit_hash}" | patch -p1 + set -e + + if [ "$?" -gt 1 ] ; then + echo "Serious issue patching" + exit 1 + fi +} build_linux_kernel() { cd "$LINUX_SRCOBJ_DIR" - kversion=$(make -s kernelversion) + kversion=$(make -s kernelversion "${make_args[@]}") + pahole_version="$(pahole --version | tr -d 'v')" + + if { verlt "${kversion}" "3.3"; } && [ "${vanilla_config}" = "imx_v6_v7_defconfig" ] ; then + # imx_v6_v7 didn't exist before 06965c39b4c63933fa0a1cde2237ef85477c5655 + if { verlt "${kversion}" "3.2"; } ; then + vanilla_config='mx5_defconfig' + else + vanilla_config='mx51_defconfig' + fi + fi + + if { verlt "${kversion}" "3.13"; } && [ "${vanilla_config}" = "pseries_le_defconfig" ] ; then + # pseries_le_deconfig was introduced in f53e462e907cbaed29c49c0f10f5b8f614e1bf1d + vanilla_config='pseries_defconfig' + fi # Generate kernel configuration case "$ktag" in Ubuntu*) - if [ "${cross_arch}" = "powerpc" ]; then - if vergte "${kversion}" "4.10"; then - echo "Ubuntu removed big endian powerpc configuration from kernel >= 4.10. Don't try to build it." - exit 0 - fi + if [ "${cross_arch}" = "powerpc" ] && vergte "${kversion}" "4.10"; then + echo "Ubuntu removed big endian powerpc configuration from kernel >= 4.10. Don't try to build it." + exit 0 fi - # Disable riscv64 config generation, we don't have a toolchain on bionic - sed -i 's/riscv64 //' debian.master/etc/kernelconfig + if [ "${cross_arch}" = "riscv64" ] && verlt "${kversion}" "6.2"; then + echo "Ubuntu added RISC-V config to their 'regular' kernels in v6.2. Don't try to build it." + exit 0 + fi - fakeroot debian/rules clean KW_DEFCONFIG_DIR=. + FAKEROOT_ARGS=( + 'KW_DEFCONFIG_DIR=.' + ) + fakeroot debian/rules clean "${FAKEROOT_ARGS[@]}" # Hack for kernel Ubuntu-hwe-5.8 # The debian/control file is produced by the clean target above, so this @@ -189,7 +339,19 @@ build_linux_kernel() { # Ubuntu annotations. # In any case, the configuration will be updated with any missing values # later in our build script. - fakeroot debian/rules genconfigs KW_DEFCONFIG_DIR=. do_skip_checks=true + FAKEROOT_ARGS+=('do_skip_checks=true') + + # Some Ubuntu tags default the toolchain using `gcc?=gcc-XX` in + # `debian/rules.d/0-common-vars.mk`. This may fail if the gcc version + # used as a default isn't available. + # For example, Ubuntu-6.8.0-7.7 sets `gcc?=gcc-13`, and that version + # of gcc isn't available on the deb12-amd64 ci-nodes. + # Work has also already been done in `select_compiler` to make our + # own decision of which compiler to use. As a result of both cases, + # our compiler choice should be passed into genconfigs. + FAKEROOT_ARGS+=("gcc=${selected_cc}") + + fakeroot debian/rules genconfigs "${FAKEROOT_ARGS[@]}" cp CONFIGS/"${ubuntu_config}" .config ;; @@ -199,15 +361,52 @@ build_linux_kernel() { export ARCH="i386" fi - # allyesconfig is mostly broken for kernels of the 2.6 series - if verlt "$kversion" "3.0"; then - vanilla_config="defconfig" - fi - - make "${vanilla_config}" + make "${vanilla_config}" "${make_args[@]}" ;; esac + if [ "${vanilla_config}" = "pseries_defconfig" ] && [ "${cross_arch}" = "ppc64el" ] ; then + # @see diff <(git show v3.13:arch/powerpc/configs/pseries_defconfig) <(git show v3.13:arch/powerpc/configs/pseries_le_defconfig) + scripts/config --enable CONFIG_CPU_LITTLE_ENDIAN + scripts/config --enable CONFIG_CMA + scripts/config --disable CONFIG_XMON_DEFAULT + # scripts/config --disable CONFIG_VIRTUALIZATION + # scripts/config --disable CONFIG_KVM_BOOK3S_64 + scripts/config --disable CONFIG_KVM_BOOK3S_64_HV + fi + + if [ -f "init/Kconfig.suse" ] ; then + # Get values from git tag, eg. 'rpm-5.14.21-150400.24.108' + # Note: the "150400" type of SUSE major version is only present on tags + # from 2022 and newer (about half-way through SLE15SP3). + # This will not work as expected on earlier tags. + SLES_RELEASE="$(echo "${ktag}" | cut -d '-' -f 3 | cut -d'.' -f 1)" + scripts/config --set-val CONFIG_SUSE_VERSION $((10#"$(echo "${SLES_RELEASE}" | head -c 2)")) + scripts/config --set-val CONFIG_SUSE_PATCHLEVEL $((10#"$(echo "${SLES_RELEASE}" | head -c 4 | tail -c 2)")) + + # Disable the renesas clk driver that has build issues, + # eg. drivers/clk/renesas/renesas-rzg2l-cpg.c:185:17: error: ‘clk’ undeclared (first use in this function) + scripts/config --disable CONFIG_CLK_RENESAS + + # From drives/spi/spi-atmel.c + # ./include/linux/gpio/consumer.h:141:49: note: expected ‘struct gpio_desc *’ but argument is of type 'int' + scripts/config --disable CONFIG_SPI_ATMEL + scripts/config --disable CONFIG_SPI_AT91_USART + scripts/config --disable CONFIG_SPI_ATMEL_QUADSPI + + # drivers/net/wireless/mediatek/mt76/mt7915/testmode.c: In function ‘mt7915_tm_set_wmm_qid’: + # drivers/net/wireless/mediatek/mt76/mt7915/testmode.c:176:30: error: ‘struct mt7915_vif’ has no member named ‘mt76’ + scripts/config --disable CONFIG_WLAN_VENDOR_MEDIATEK + + # drivers/net/wireless/microchip/wilc1000/cfg80211.c: In function ‘wilc_wfi_cfg_parse_ch_attr’: + # drivers/net/wireless/microchip/wilc1000/cfg80211.c:970:17: error: ‘for’ loop initial declarations are only allowed in C99 or C11 mode + scripts/config --disable CONFIG_WLAN_VENDOR_MICROCHIP + + # fs/f2fs/file.c: In function ‘punch_hole’: + # fs/f2fs/file.c:1093:49: error: ‘mapping’ undeclared (first use in this function) + scripts/config --disable CONFIG_F2FS_FS + fi + # oldnoconfig was renamed in 4.19 if vergte "$kversion" "4.19"; then update_conf_target="olddefconfig" @@ -231,12 +430,219 @@ build_linux_kernel() { fi fi + if { verlt "${kversion}" "5.11"; } && { vergte "${kversion}" "4.10"; } ; then + # Binutils > 2.35 strips empty symbol tables, causing obltool to fail + # in certain cases when files are empty. + # @see https://gitlab.com/linux-kernel/stable/-/commit/1d489151e9f9d1647110277ff77282fe4d96d09b + # + # There doesn't seem to be any LD/AS/AR flags to control this behaviour, + # therefore patching tools/objtool/elf.c is attempted. + patch_linux_kernel 1d489151e9f9d1647110277ff77282fe4d96d09b + if { verlt "${kversion}" "4.18"; } ; then + patch_linux_kernel e81e0724432542af8d8c702c31e9d82f57b1ff31 + fi + fi + + if { vergt "${selected_cc_version}" "7"; } && { vergte "${kversion}" "4.14"; } && { verlt "${kversion}" "4.17"; } ; then + # Builds fail due to -Werror=restrict in pager.o and str_error_r.o + if { verlt "${kversion}" "4.16"; } ; then + # This is patched since objtool's Makefile doesn't respect HOSTCFLAGS + # @see https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ad343a98e74e85aa91d844310e797f96fee6983b + patch_linux_kernel ad343a98e74e85aa91d844310e797f96fee6983b + fi + if { verlt "${kversion}" "4.17"; } ; then + # This is patched since objtool's Makefile doesn't respect HOSTCFLAGS + # @see https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=854e55ad289ef8888e7991f0ada85d5846f5afb9 + patch_linux_kernel 854e55ad289ef8888e7991f0ada85d5846f5afb9 + fi + + fi + + if { vergt "${selected_cc_version}" "9"; } && { verlt "${kversion}" "5.6"; } ; then + # Duplicate decalarations of __force_order + # @see https://gitlab.com/linux-kernel/stable/-/commit/df6d4f9db79c1a5d6f48b59db35ccd1e9ff9adfc + # However, kaslr_64.c doesn't exit in 4.15, 4.16, it's named pagetable.c + if [ -f arch/x86/boot/compressed/pagetable.c ] ; then + sed -i '/^unsigned long __force_order;$/d' arch/x86/boot/compressed/pagetable.c + fi + if [ -f arch/x86/boot/compressed/kaslr_64.c ] ; then + patch_linux_kernel df6d4f9db79c1a5d6f48b59db35ccd1e9ff9adfc + fi + fi + + if { vergte "${kversion}" "4.18"; } && { verlt "${kversion}" "4.19"; } ; then + # In some cases, compiling net/bpfilter can fail with the following error: + # net/bpfilter/main.c:9:10: fatal error: include/uapi/linux/bpf.h: No such file or directory + # make[2]: *** [scripts/Makefile.host:107: net/bpfilter/main.o] Error 1 + # + # While the issue is potentially in a number of old versions, it has only + # been observed in v4.18-rt + # + patch_linux_kernel 303a339f30a9441c4695d3d2cc78f1b33cd959ff + fi + + if { vergte "${kversion}" "4.18"; } && { verlt "${kversion}" "4.19"; } ; then + # In some cases, compiling net/bpfilter can fail with the following error: + # net/bpfilter/main.c:9:10: fatal error: include/uapi/linux/bpf.h: No such file or directory + # make[2]: *** [scripts/Makefile.host:107: net/bpfilter/main.o] Error 1 + # + # While the issue is potentially in a number of old versions, it has only + # been observed in v4.18-rt + # + patch_linux_kernel 303a339f30a9441c4695d3d2cc78f1b33cd959ff + fi + + if { vergte "${kversion}" "4.15"; } && { verlt "${kversion}" "4.18"; } ; then + # Some old kernels fail to build when make is too new + # @see https://gitlab.com/linux-kernel/stable/-/commit/9feeb638cde083c737e295c0547f1b4f28e99583 + patch_linux_kernel 9564a8cf422d7b58f6e857e3546d346fa970191e + fi + + if { vergte "${kversion}" "4.14"; } && { verlt "${kversion}" "4.14.55"; } ; then + # Some old kernels fail to build when make is too new + # @see https://gitlab.com/linux-kernel/stable/-/commit/9feeb638cde083c737e295c0547f1b4f28e99583 + patch_linux_kernel e82885490a611f2b75a6c27cd7bb09665c1740be + fi + + if ( { vergte "${kversion}" "4.15"; } && { verlt "${kversion}" "4.18"; } ) || \ + ( { vergte "${kversion}" "4.14"; } && { verlt "${kversion}" "4.14.56"; } ) ; then + # Some old kernels fail to build when make is too new + # @see https://gitlab.com/linux-kernel/stable/-/commit/9feeb638cde083c737e295c0547f1b4f28e99583 + patch_linux_kernel 9feeb638cde083c737e295c0547f1b4f28e99583 + fi + + if ( { vergte "${kversion}" "4.12"; } && { verlt "${kversion}" "4.20.17"; } ) || \ + ( { vergte "${kversion}" "5.0"; } && { verlt "${kversion}" "5.0.12"; } ) ; then + # Old kernels can fail to build while on newer host kernels with errors + # such as: + # In file included from scripts/selinux/genheaders/genheaders.c:19: + # ./security/selinux/include/classmap.h:249:2: error: #error New address family defined, please update secclass_map. + # @see https://gitlab.com/linux-kernel/stable/-/commit/dfbd199a7cfe3e3cd8531e1353cdbd7175bfbc5e + # + patch_linux_kernel dfbd199a7cfe3e3cd8531e1353cdbd7175bfbc5e + fi + + # Compatibility with binutils >= ~ 2.31 + if { vergte "${kversion}" "3.19"; } && { verlt "${kversion}" "4.16"; } ; then + patch_linux_kernel b21ebf2fb4cde1618915a97cc773e287ff49173e + fi + if { vergte "${kversion}" "3.17"; } && { verlt "${kversion}" "3.18.69"; } ; then + patch_linux_kernel edb9d2d5e647e7a8521b0d35f8452deb02dfd138 + fi + if { vergte "${kversion}" "3.17"; } && { verlt "${kversion}" "3.18.100"; } ; then + patch_linux_kernel 3be6583f0b6f1bf1ee650ebf473d9dee36836527 + patch_linux_kernel 12d839211d080f6a9c370398c41a260365d34c62 + fi + if { vergte "${kversion}" "3.16"; } && { verlt "${kversion}" "3.16.82"; } ; then + patch_linux_kernel ad10e6d464796f2a481de4039a43b9cfca034e1c + fi + + if ( { vergte "${kversion}" "3.14"; } && { verlt "${kversion}" "4.4"; } ) || + ( { vergte "${kversion}" "4.8"; } && { verlt "${kversion}" "4.18"; } ); then + # While the original motivation of this patch is for fixing builds using + # clang, the same error occurs between linux >= 3.14 and < 4.4, and in + # 4.15, 4.16. + # For rt-linux, the error has been observed in 4.8, 4.11, and 4.13. + # + # This patch only partially applies due to changes in kernel/Makefile, + # so a supplementary patch is needed + # + # Without this patch, builds fail with + # Cannot find symbol for section 2: .text. + # kernel/elfcore.o: failed + # + # @see https://github.com/linuxppc/issues/issues/388 + # @see https://lore.kernel.org/lkml/20201204165742.3815221-2-arnd@kernel.org/ + # + patch_linux_kernel 6e7b64b9dd6d96537d816ea07ec26b7dedd397b9 + if grep -q elfcore.o kernel/Makefile ; then + sed -i '/^.* += elfcore.o$/d' kernel/Makefile + fi + fi + # Same as above for the v4.4 branch + if ( { vergte "${kversion}" "4.4"; } && { verlt "${kversion}" "4.4.257"; } ); then + patch_linux_kernel 3140b0740b31cc63cf2ee08bc3f746b423eb068d + if grep -q elfcore.o kernel/Makefile ; then + sed -i '/^.* += elfcore.o$/d' kernel/Makefile + fi + fi + + if { vergte "${kversion}" "4.5"; } && { verlt "${kversion}" "4.8"; } ; then + # Kernels between v4.5 and v4.8 built with gcc >= 8 on arm will hit an + # assembler error : + # + # kernel/.tmp_fork.s: Assembler messages: + # kernel/.tmp_fork.s:1790: Error: .err encountered + # + # @see https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85745 + # + patch_linux_kernel 9f73bd8bb445e0cbe4bcef6d4cfc788f1e184007 + fi + + if ( { vergte "${kversion}" "4.4"; } && { verlt "${kversion}" "4.4.136"; } ) || + ( { vergte "${kversion}" "4.5"; } && { verlt "${kversion}" "4.8"; } ); then + # Hacky patch to deal with the following build error: + # Cannot find symbol for section 7: .text.unlikely. + # kernel/kexec_file.o: failed + # make[1]: *** [scripts/Makefile.build:291: kernel/kexec_file.o] Error 1 + # + # This error happens with binutils 2.36 and 2.37, but should probably not + # be an issue with binutils 2.38. + # @see https://github.com/linuxppc/issues/issues/388 + # @see https://github.com/bminor/binutils-gdb/commit/c09c8b42021180eee9495bd50d8b35e683d3901b + # + # There is some sort of config (unspecified in past discussions) which + # provokes the error, and there was never a potential fix merged in + # this discussion, in part because the build systems of the kernel + # switched to objtool instead. + # + # @see https://lore.kernel.org/all/20210215162209.5e2a475b@gandalf.local.home/ + # + sed -i 's/return txtname;/return shdr0->sh_size ? txtname : NULL;/' scripts/recordmcount.h + + # After applying the above patch, the build continues but fails with + # head64.c:(.text.exit+0x5): undefined reference to `__gcov_exit' + # + scripts/config --disable CONFIG_GCOV_KERNEL + fi + + if { vergte "${kversion}" "4.5"; } && { verlt "${kversion}" "4.5.5"; } ; then + # drivers/staging/wilc1000/wilc_spi.c:123:34: error: storage size of ‘wilc1000_spi_ops’ isn’t known + patch_linux_kernel ce7b516f3f9e11fe4ee06fad0d7e853bb6e8f160 + fi + # Newer binutils don't accept 3 operand 'cmp' instructions on ppc64 # Convert them to 'cmpw' which was previously done silently if verlt "$kversion" "4.9"; then - 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/" - 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/" - sed -i "s/\$pie \-o \"\$ofile\"/\$pie --no-dynamic-linker -o \"\$ofile\"/" arch/powerpc/boot/wrapper + 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/" + 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/" + sed -i "s/\$pie \-o \"\$ofile\"/\$pie --no-dynamic-linker -o \"\$ofile\"/" arch/powerpc/boot/wrapper + fi + + if [ "$(scripts/config --state CONFIG_EXTCON_ADC_JACK)" != "n" ] && + ( { vergte "${kversion}" "4.2"; } && { verlt "${kversion}" "4.12"; } ); then + # 73b6ecdb93e8e77752cae9077c424fcdc6f23c39 introduced a change where + # extcon-adc-jack.h has an incompatible pointer type. + # In GCC >= 5 this will provoke a warning and build failure. + # Eg. + # drivers/extcon/extcon-adc-jack.c: In function ‘adc_jack_probe’: + # drivers/extcon/extcon-adc-jack.c:111:64: error: passing argument 2 of ‘devm_extcon_dev_allocate’ from incompatible pointer type [-Werror=incompatible-pointer-types] + # make[2]: *** [scripts/Makefile.build:295: drivers/extcon/extcon-adc-jack.o] Error 1 + # + # 8a522bf2d4f788306443d36b26b54f0aedcdfdbe (in 4.11) has a fix for this warning + # + patch_linux_kernel 8a522bf2d4f788306443d36b26b54f0aedcdfdbe + fi + + if ( { vergte "${kversion}" "4.15"; } && { verlt "${kversion}" "4.15.2"; } ) || \ + ( { vergte "${kversion}" "4.14"; } && { verlt "${kversion}" "4.14.18"; } ) ; then + # Fix an objtool Segmentation fault + patch_linux_kernel dd12561854824fd1f05baf2a1b794faa046e2425 + fi + + if { vergte "${kversion}" "4.14"; } && { verlt "${kversion}" "4.14.268"; } ; then + # Builds fail due to -Werror=use-after-free in sigchain.o and help.o + patch_linux_kernel e89bb266b710ce056f141f29f091fd468a4a8185 fi # Fix a typo in v2.6.36.x @@ -258,9 +664,45 @@ build_linux_kernel() { echo "header-y += linkage.h" >> include/linux/Kbuild fi + if [ "${cross_arch}" = "powerpc" ] ; then + if { vergte "${kversion}" "4.15"; } && { verlt "${kversion}" "4.16"; } ; then + # Avoid register errors such as + # aes_generic.c:(.text+0x4e0): undefined reference to `_restgpr_31_x' + # @see https://gitlab.com/linux-kernel/stable/-/commit/148b974deea927f5dbb6c468af2707b488bfa2de + make_args+=( + CFLAGS_aes_generic.o='' + ) + fi + fi + + if [ "$(scripts/config --state CONFIG_DEBUG_INFO_BTF)" == "y" ] && + { vergte "${pahole_version}" "1.24"; } && + { vergte "${kversion}" "5.10"; } && { verlt "${kversion}" "6.0"; } ;then + # Some kernels Eg. Ubuntu-hwe-5.13-5.13.0-52.59_20.04.1 + # fail with the following error: + # BTFIDS vmlinux + # FAILED: load BTF from vmlinux: Invalid argument + # + # When CONFIG_DEBUG_INFO_BTF is set, certain versions of pahole require + # `--skip_encoding_btf_enum64` to be passed as the kernel doesn't define + # BTF_KIND_ENUM64. + # + # Introduced in 341dfcf8d78eaa3a2dc96dea06f0392eb2978364 (~v5.10) + # @see https://lore.kernel.org/bpf/20220825171620.cioobudss6ovyrkc@altlinux.org/t/ + # + if [ -f "scripts/pahole-flags.sh" ] ; then + # shellcheck disable=SC2016 + sed -i 's/ -J ${PAHOLE_FLAGS} / -J ${PAHOLE_FLAGS} --skip_encoding_btf_enum64 /' scripts/link-vmlinux.sh + else + # shellcheck disable=SC2016 + sed -i 's/ -J ${extra_paholeopt} / -J ${extra_paholeopt} --skip_encoding_btf_enum64 /' scripts/link-vmlinux.sh + fi + fi + # GCC 4.8 if [ "$HOSTCC" == "gcc-4.8" ]; then - scripts/config --disable CONFIG_CC_STACKPROTECTOR_STRONG + scripts/config --disable CONFIG_CC_STACKPROTECTOR_STRONG + scripts/config --disable CONFIG_PPC_OF_BOOT_TRAMPOLINE fi # Don't try to sign modules @@ -288,6 +730,27 @@ build_linux_kernel() { scripts/config --disable CONFIG_MFD_WM8994 scripts/config --disable CONFIG_DRM_RADEON scripts/config --disable CONFIG_SND_SOC_WM5100 + # More recent compiler optimizations (from gcc 8 onwards )expose build errors + # with netronome on older kernels. + # Observed in 4.11-rt, 4.15-4.17, 5.0-rt - 5.16-rt + # It seems easier to disable the driver than to attempt patching. + # Eg. + # In function ‘ur_load_imm_any’, + # inlined from ‘jeq_imm’ at drivers/net/ethernet/netronome/nfp/bpf/jit.c:3146:13: + # ./include/linux/compiler.h:350:45: error: call to ‘__compiletime_assert_1062’ declared with attribute error: FIELD_FIT: value too large for the field + # 350 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__) + # + scripts/config --disable CONFIG_NET_VENDOR_NETRONOME + # Eg. + # In function ‘memcpy’, + # inlined from ‘kszphy_get_strings’ at drivers/net/phy/micrel.c:664:3: + # ./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 + # 305 | __read_overflow2(); + # | ^~~~~~~~~~~~~~~~~~ + # make[3]: *** [scripts/Makefile.build:308: drivers/net/phy/micrel.o] Error 1 + # + scripts/config --disable CONFIG_MICREL_PHY + # IGBVF won't build with recent gcc on 2.6.38.x if { vergte "$kversion" "2.6.37" && verlt "$kversion" "2.6.38"; }; then @@ -296,6 +759,7 @@ build_linux_kernel() { # Don't fail the build on warnings scripts/config --disable CONFIG_WERROR + scripts/config --enable CONFIG_PPC_DISABLE_WERROR # Set required options scripts/config --enable CONFIG_TRACEPOINTS @@ -310,26 +774,19 @@ build_linux_kernel() { scripts/config --enable CONFIG_EVENT_TRACING scripts/config --enable CONFIG_KRETPROBES - # FIXME: disable objtool on vmlinux, it OOMs on allyesconfig - sed -i 's/objtool_link vmlinux.o//' scripts/link-vmlinux.sh || true - # Starting with v6.1-rc6 - sed -i 's/^objtool-enabled := .*/objtool-enabled := /' scripts/Makefile.vmlinux_o || true - - # Disable SORTTAB - sed -i 's/is_enabled CONFIG_BUILDTIME_TABLE_SORT/is_enabled CONFIG_NONEXISTANT/' scripts/link-vmlinux.sh || true - - # Debug - #cat .config + if [ -n "${DEBUG}" ] ; then + cat .config + fi - make "$update_conf_target" CC="$CC" - make -j"$NPROC" CC="$CC" + make "$update_conf_target" "${make_args[@]}" + make -j"$NPROC" "${make_args[@]}" - krelease=$(make -s kernelrelease CC="$CC") + krelease=$(make -s kernelrelease "${make_args[@]}") # Save the kernel and modules mkdir -p "$LINUX_INSTOBJ_DIR/boot" - make INSTALL_MOD_PATH="$LINUX_INSTOBJ_DIR" INSTALL_MOD_STRIP=1 modules_install CC="$CC" - make INSTALL_MOD_PATH="$LINUX_INSTOBJ_DIR" INSTALL_PATH="$LINUX_INSTOBJ_DIR/boot" install CC="$CC" + make INSTALL_MOD_PATH="$LINUX_INSTOBJ_DIR" INSTALL_MOD_STRIP=1 modules_install "${make_args[@]}" + make INSTALL_MOD_PATH="$LINUX_INSTOBJ_DIR" INSTALL_PATH="$LINUX_INSTOBJ_DIR/boot" install "${make_args[@]}" rm -f "$LINUX_INSTOBJ_DIR/lib/modules/${krelease}/source" "$LINUX_INSTOBJ_DIR/lib/modules/${krelease}/build" ln -s ../../../../sources "$LINUX_INSTOBJ_DIR/lib/modules/${krelease}/source" ln -s ../../../../sources "$LINUX_INSTOBJ_DIR/lib/modules/${krelease}/source" @@ -359,12 +816,12 @@ extract_distro_headers() { # Copy arch includes (find arch -name include -type d -print0 | \ - xargs -0 -n1 -i: find : -type f) | \ + xargs -0 -n1 -I '{}' find '{}' -type f) | \ cpio -pd --preserve-modification-time "${LINUX_HDROBJ_DIR}" # Copy arch scripts (find arch -name scripts -type d -print0 | \ - xargs -0 -n1 -i: find : -type f) | \ + xargs -0 -n1 -I '{}' find '{}' -type f) | \ cpio -pd --preserve-modification-time "${LINUX_HDROBJ_DIR}" # Cleanup scripts @@ -373,7 +830,7 @@ extract_distro_headers() { # On powerpc 32bits this object is required to link modules if [ "${karch}" = "powerpc" ]; then - if [ "x$(scripts/config -s CONFIG_PPC64)" = "xy" ] && vergte "${kversion}" "5.4"; then + if [ "$(scripts/config -s CONFIG_PPC64)" = "y" ] && vergte "${kversion}" "5.4"; then : else cp -a --parents arch/powerpc/lib/crtsavres.[So] "${LINUX_HDROBJ_DIR}/" @@ -387,6 +844,12 @@ extract_distro_headers() { fi fi + # On riscv with 5.14 the vsdo objects are required + if [ "${karch}" = "riscv" ] && \ + ( { vergte "${kversion}" "5.14"; } && { verlt "${kversion}" "5.15"; } ); then + cp -a --parents arch/riscv/kernel/vdso/*.o "${LINUX_HDROBJ_DIR}/" + fi + # Newer kernels need objtool to build modules when CONFIG_STACK_VALIDATION=y if [ -f tools/objtool/objtool ]; then cp -a --parents tools/objtool/objtool "${LINUX_HDROBJ_DIR}/" @@ -433,21 +896,21 @@ extract_distro_headers() { make clean # And regen the modules support files - make modules_prepare CC="$CC" + make modules_prepare "${make_args[@]}" # On powerpc 32bits this object is required to link modules if [ "${karch}" = "powerpc" ]; then - if [ "x$(scripts/config -s CONFIG_PPC64)" = "xy" ] && vergte "${kversion}" "5.4"; then + if [ "$(scripts/config -s CONFIG_PPC64)" = "y" ] && vergte "${kversion}" "5.4"; then : else - make arch/powerpc/lib/crtsavres.o CC="$CC" + make arch/powerpc/lib/crtsavres.o "${make_args[@]}" fi fi # On arm64 between 4.13 and 4.15 this object is required to build with ftrace support if [ "${karch}" = "arm64" ]; then if [ -f "arch/arm64/kernel/ftrace-mod.S" ]; then - make arch/arm64/kernel/ftrace-mod.o CC="$CC" + make arch/arm64/kernel/ftrace-mod.o "${make_args[@]}" fi fi @@ -459,6 +922,14 @@ extract_distro_headers() { echo "#define UTS_UBUNTU_RELEASE_ABI $ABINUM" >> include/generated/utsrelease.h echo "#define UTS_UBUNTU_RELEASE_ABI $ABINUM" >> "${LINUX_HDROBJ_DIR}/include/generated/utsrelease.h" ;; + rpm-*) + # Update the definition of UTS_RELEASE to match something akin to '5.14.21-150400.24.108-default' + if [ -f "init/Kconfig.suse" ] ; then + SLESVERSION="$(echo "${ktag}" | cut -d'-' -f 3)-default" + sed -E -i "s%^(#define UTS_RELEASE \"[\.a-z0-9]+)(\")%\1-${SLESVERSION}\2%g" include/generated/utsrelease.h + sed -E -i "s%^(#define UTS_RELEASE \"[\.a-z0-9]+)(\")%\1-${SLESVERSION}\2%g" "${LINUX_HDROBJ_DIR}/include/generated/utsrelease.h" + fi + ;; esac } @@ -486,8 +957,8 @@ build_modules() { set +e # Build modules - KERNELDIR="${kdir}" make -j"${NPROC}" V=1 CC="$CC" - ret=$? + KERNELDIR="${kdir}" make -j"${NPROC}" V=1 "${make_args[@]}" + ret=$? set -e @@ -505,7 +976,7 @@ build_modules() { else # Regular build # Build modules against full kernel sources - KERNELDIR="${kdir}" make -j"${NPROC}" V=1 CC="$CC" + KERNELDIR="${kdir}" make -j"${NPROC}" V=1 "${make_args[@]}" # Install modules to build dir KERNELDIR="${kdir}" make INSTALL_MOD_PATH="${outdir}" modules_install @@ -541,6 +1012,7 @@ cd "$WORKSPACE" # Create build directories mkdir -p "${LINUX_SRCOBJ_DIR}" "${LINUX_HDROBJ_DIR}" "${LINUX_INSTOBJ_DIR}" "${MODULES_OUTPUT_KSRC_DIR}" "${MODULES_OUTPUT_KHDR_DIR}" +print_header "Clone LTTng-modules sources" git_clone_modules_sources # Setup cross compile env if available @@ -575,6 +1047,13 @@ if [ "x${cross_arch}" != "x" ]; then ubuntu_config="ppc64el-config.flavour.generic" ;; + "riscv64") + karch="riscv" + cross_compile="riscv64-linux-gnu-" + vanilla_config="defconfig" + ubuntu_config="riscv64-config.flavour.generic" + ;; + *) echo "Unsupported cross arch $cross_arch" exit 1 @@ -591,40 +1070,46 @@ elif [ "x${arch}" != "x" ]; then case "$arch" in "i386") karch="x86" - vanilla_config="allyesconfig" + vanilla_config="allmodconfig" ubuntu_config="i386-config.flavour.generic" ;; "amd64") karch="x86" - vanilla_config="allyesconfig" + vanilla_config="allmodconfig" ubuntu_config="amd64-config.flavour.generic" ;; "armhf") karch="arm" - vanilla_config="allyesconfig" + vanilla_config="allmodconfig" ubuntu_config="armhf-config.flavour.generic" ;; "arm64") karch="arm64" - vanilla_config="allyesconfig" + vanilla_config="allmodconfig" ubuntu_config="arm64-config.flavour.generic" ;; "powerpc") karch="powerpc" - vanilla_config="allyesconfig" + vanilla_config="allmodconfig" ubuntu_config="powerpc-config.flavour.powerpc-smp" ;; "ppc64el") karch="powerpc" - vanilla_config="allyesconfig" + vanilla_config="allmodconfig" ubuntu_config="ppc64el-config.flavour.generic" ;; + "riscv64") + karch="riscv" + vanilla_config="allmodconfig" + ubuntu_config="riscv64-config.flavour.generic" + ;; + *) echo "Unsupported arch $arch" exit 1 @@ -640,6 +1125,7 @@ fi # First get the kernel build from the object store, or build it, if it's # not available. +set +x echo "# Setup endpoint host_base = obj.internal.efficios.com host_bucket = obj.internal.efficios.com @@ -652,14 +1138,15 @@ secret_key = echo123456 # Enable S3 v4 signature APIs signature_v2 = False" > "$WORKSPACE/.s3cfg" +set -x url_hash="$(echo -n "$kgitrepo" | md5sum | awk '{ print $1 }')" obj_name="linux.tar.bz2" -if [ "x${cross_arch}" = "x" ]; then - obj_url_prefix="$OBJ_STORE_URL/linux-build/$url_hash/$ktag/platform-${platform}/$arch/native" +if [ -z "${cross_arch}" ]; then + obj_url_prefix="$OBJ_STORE_URL/linux-build/$url_hash/$ktag/platform-${platform}/$arch/native" else - obj_url_prefix="$OBJ_STORE_URL/linux-build/$url_hash/$ktag/platform-${platform}/${cross_arch}" + obj_url_prefix="$OBJ_STORE_URL/linux-build/$url_hash/$ktag/platform-${platform}/${cross_arch}" fi obj_url="$obj_url_prefix/$obj_name" @@ -674,12 +1161,17 @@ set -e case "$ret" in "0") + print_header "Get sources and prebuilt kernel" s3cmd -c "$WORKSPACE/.s3cfg" get "$obj_url" extract_archive_obj + + print_header "Select compiler and set build flags" + select_compiler + export_kbuild_flags ;; "12") - echo "File not found" + print_header "Clone kernel sources" # Build all the things and upload # then finish the module build... @@ -687,16 +1179,19 @@ case "$ret" in git_clone_linux_sources git_export_linux_sources + print_header "Select compiler and set build flags" select_compiler + export_kbuild_flags ## PREPARE FULL LINUX SOURCE TREE + print_header "Build kernel from source" build_linux_kernel ## EXTRACT DISTRO STYLE KERNEL HEADERS / DEVEL extract_distro_headers + print_header "Upload kernel to object storage" tar_archive_obj - upload_archive_obj ;; @@ -707,7 +1202,6 @@ case "$ret" in ;; esac -select_compiler ## BUILD modules # Either we downloaded a pre-build kernel or we built it and uploaded @@ -715,12 +1209,15 @@ select_compiler cd "$WORKSPACE" -# Build modules against full kernel sources +print_header "Build modules against full kernel sources" build_modules "${LINUX_SRCOBJ_DIR}" "${MODULES_OUTPUT_KSRC_DIR}" -# Build modules against kernel headers +print_header "Build modules against kernel headers" build_modules "${LINUX_HDROBJ_DIR}" "${MODULES_OUTPUT_KHDR_DIR}" + +print_header "Check for built modules in install directory" + # Make sure some modules were actually built tree "${MODULES_OUTPUT_KSRC_DIR}" if [ "x$(find "${MODULES_OUTPUT_KSRC_DIR}" -name '*.ko*' -printf yes -quit)" != "xyes" ]; then