scripts/lttng-modules/param-build.sh

   1 #!/bin/bash
   2 #
   3 # Copyright (C) 2016-2019 Michael Jeanson <mjeanson@efficios.com>
   4 #
   5 # This program is free software: you can redistribute it and/or modify
   6 # it under the terms of the GNU General Public License as published by
   7 # the Free Software Foundation, either version 3 of the License, or
   8 # (at your option) any later version.
   9 #
  10 # This program is distributed in the hope that it will be useful,
  11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 # GNU General Public License for more details.
  14 #
  15 # You should have received a copy of the GNU General Public License
  16 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17
  18 set -exu
  19
  20 # Parameters
  21 platforms=${platforms:-}
  22 # Derive arch from label if it isn't set
  23 if [ -z "${arch:-}" ] ; then
  24     # Labels may be platform specific, eg. jammy-amd64, deb12-armhf
  25     regex='[[:alnum:]]+-([[:alnum:]]+)'
  26     if [[ "${platforms}" =~ ${regex} ]] ; then
  27         arch="${BASH_REMATCH[1]}"
  28     else
  29         arch="${platforms:-}"
  30     fi
  31 fi
  32
  33 cross_arch=${cross_arch:-}
  34 ktag=${ktag:-}
  35 kgitrepo=${kgitrepo:-}
  36 mversion=${mversion:-}
  37 mgitrepo=${mgitrepo:-}
  38 make_args=()
  39
  40 DEBUG=${DEBUG:-}
  41
  42 ## FUNCTIONS ##
  43
  44 # Kernel version compare functions
  45 verlte() {
  46     [  "$1" = "$(printf '%s\n%s' "$1" "$2" | sort -V | head -n1)" ]
  47 }
  48
  49 verlt() {
  50     # shellcheck disable=SC2015
  51     [ "$1" = "$2" ] && return 1 || verlte "$1" "$2"
  52 }
  53
  54 vergte() {
  55     [  "$1" = "$(printf '%s\n%s' "$1" "$2" | sort -V | tail -n1)" ]
  56 }
  57
  58 vergt() {
  59     # shellcheck disable=SC2015
  60     [ "$1" = "$2" ] && return 1 || vergte "$1" "$2"
  61 }
  62
  63 git_clone_modules_sources() {
  64     mkdir -p "$MODULES_GIT_DIR"
  65
  66     # If the version starts with "refs/", checkout the specific git ref, otherwise treat it
  67     # as a branch name.
  68     if [ "${mversion:0:5}" = "refs/" ]; then
  69         git clone --no-tags --depth=1 "${mgitrepo}" "$MODULES_GIT_DIR"
  70         (cd "$MODULES_GIT_DIR" && git fetch origin "${mversion}" && git checkout FETCH_HEAD)
  71     else
  72         git clone --no-tags --depth=1 -b "${mversion}" "${mgitrepo}" "$MODULES_GIT_DIR"
  73     fi
  74 }
  75
  76 # Checkout a shallow kernel tree of the specified tag
  77 git_clone_linux_sources() {
  78     mkdir -p "$LINUX_GIT_DIR"
  79     git clone --depth=1 -b "${ktag}" --reference "$LINUX_GIT_REF_REPO_DIR" "${kgitrepo}" "$LINUX_GIT_DIR"
  80 }
  81
  82
  83 # Export the kernel sources from the git repo
  84 git_export_linux_sources() {
  85     cd "$LINUX_GIT_DIR"
  86     git archive "${ktag}" | tar -x -C "$LINUX_SRCOBJ_DIR"
  87 }
  88
  89
  90 # Upload the tar archive to the object store
  91 upload_archive_obj() {
  92     s3cmd -c "$WORKSPACE/.s3cfg" put "$WORKSPACE/$obj_name" "$obj_url_prefix/"
  93     rm -f "$WORKSPACE/$obj_name"
  94 }
  95
  96
  97 extract_archive_obj() {
  98     tar -xf "$WORKSPACE/$obj_name" -C "$LINUX_OBJ_DIR" -I pbzip2
  99     rm -f "$WORKSPACE/$obj_name"
 100 }
 101
 102
 103 tar_archive_obj() {
 104     cd "$LINUX_OBJ_DIR"
 105     tar -cf "$WORKSPACE/$obj_name" -I pbzip2 .
 106     cd -
 107 }
 108
 109 list_gccs() {
 110     local gccs
 111     gccs=()
 112     IFS=: read -r -a path_array <<< "$PATH"
 113     while read -r gcc ; do
 114         gccs+=("$gcc")
 115     done < <(find "${path_array[@]}" -maxdepth 1 -regex '.*/gcc-[0-9\.]+$' -printf '%f\n' | sort -t- -k2 -V -r)
 116     echo "${gccs[@]}"
 117 }
 118
 119 # Find the most recent GCC version supported by the kernel sources
 120 select_compiler() {
 121     local selected_cc
 122
 123     cd "$LINUX_SRCOBJ_DIR"
 124
 125     kversion=$(make -s kernelversion)
 126
 127     set +e
 128
 129     for cc in $(list_gccs) ; do
 130         if "${CROSS_COMPILE:-}${cc}" -I include/ -D__LINUX_COMPILER_H -D__LINUX_COMPILER_TYPES_H -E include/linux/compiler-gcc.h; then
 131             cc_version=$(echo "${cc}" | cut -d'-' -f2)
 132             if { verlt "${kversion}" "5.17"; } && { vergt "${cc_version}" "11"; } ; then
 133                 # Using gcc-12+ with '-Wuse-after-free' breaks the build of older
 134                 # kernels (in particular, objtool). Some releases on LTS
 135                 # branches between 4.x and 5.15 can be built with gcc-12.
 136                 # @see https://lore.kernel.org/lkml/20494.1643237814@turing-police/
 137                 # @see https://gitlab.com/linux-kernel/stable/-/commit/52a9dab6d892763b2a8334a568bd4e2c1a6fde66
 138                 continue
 139             fi
 140         selected_cc="$cc"
 141         break
 142       fi
 143     done
 144
 145     set -e
 146
 147     # Force gcc-4.8 for kernels before 4.4
 148     if { verlt "$kversion" "4.4"; }; then
 149         selected_cc='gcc-4.8'
 150     fi
 151
 152     if [ "x$selected_cc" = "x" ]; then
 153       echo "Found no suitable compiler."
 154       exit 1
 155     fi
 156
 157     _KAFLAGS=()
 158     _KCFLAGS=()
 159     _KCPPFLAGS=()
 160     _HOSTCFLAGS=()
 161     if [ "$selected_cc" != "gcc-4.8" ]; then
 162         # Older kernel Makefiles do not expect the compiler to default to PIE
 163         _KAFLAGS+=(-fno-pie)
 164         _KCFLAGS+=(
 165             -fno-pie
 166             -no-pie
 167             -fno-stack-protector
 168         )
 169         _KCPPFLAGS+=(-fno-pie)
 170     fi
 171
 172     selected_cc_version="$(echo "${selected_cc}" | cut -d'-' -f2)"
 173     if { vergte "${selected_cc_version}" "10"; } && { verlt "${kversion}" "5.10"; } ; then
 174         # gcc-10 changed the default from '-fcommon' to '-fno-common', which
 175         # causes a linker failure. '-fcommon' can be set on the HOSTCFLAGS
 176         # to avoid the issue.
 177         # @see https://gitlab.com/linux-kernel/stable/-/commit/e33a814e772cdc36436c8c188d8c42d019fda639
 178         _HOSTCFLAGS+=(-fcommon)
 179     fi
 180
 181     if [ "${cross_arch:-}" == "armhf" ] ; then
 182         if { verlt "${kversion}" "5.14"; } ; then
 183             # Work-around for producing instructions that aren't valid for the
 184             # default architectures.
 185             # Eg. Error: selected processor does not support `cpsid i' in ARM mode
 186             _KCFLAGS+=(-march=armv7-a -mfpu=vfpv3-d16)
 187             _KCPPFLAGS+=(-march=armv7-a -mfpu=vfpv3-d16)
 188         fi
 189     fi
 190
 191     if { vergt "${selected_cc_version}" "8"; } && { vergte "${kversion}" "4.15"; } && { verlt "${kversion}" "4.17"; } ; then
 192         # This was added to -Wall in gcc 9 but some kernels do not include the fixes
 193         # @see https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88583
 194         _KCFLAGS+=(-Wno-error=packed-not-aligned)
 195     fi
 196
 197     export KAFLAGS="${_KAFLAGS[*]}"
 198     export KCFLAGS="${_KCFLAGS[*]}"
 199     export KCPPFLAGS="${_KCPPFLAGS[*]}"
 200     export HOSTCFLAGS="${_HOSTCFLAGS[*]}"
 201     export CC="${CROSS_COMPILE:-}${selected_cc}"
 202     export HOSTCC="${selected_cc}"
 203
 204     make_args=(
 205         CC="${CC}"
 206         HOSTCC="${HOSTCC}"
 207         HOSTCFLAGS="${HOSTCFLAGS:-}"
 208     )
 209     if [ -n "${DEBUG}" ] ; then
 210         make_args+=(
 211             V=1
 212         )
 213     fi
 214     cd -
 215 }
 216
 217 patch_linux_kernel() {
 218     local commit_hash
 219     commit_hash="$1"
 220     set +e
 221     git -C "${LINUX_GIT_REF_REPO_DIR}" format-patch -n1 --stdout "${commit_hash}" | patch -p1
 222     set -e
 223     if [ "$?" -gt 1 ] ; then
 224         echo "Serious issue patching"
 225         exit 1
 226     fi
 227 }
 228
 229 build_linux_kernel() {
 230     cd "$LINUX_SRCOBJ_DIR"
 231
 232     kversion=$(make -s kernelversion "${make_args[@]}")
 233     pahole_version="$(pahole --version | tr -d 'v')"
 234
 235     if { verlt "${kversion}" "3.3"; } && [ "${vanilla_config}" = "imx_v6_v7_defconfig" ] ; then
 236         # imx_v6_v7 didn't exist before 06965c39b4c63933fa0a1cde2237ef85477c5655
 237         if { verlt "${kversion}" "3.2"; } ; then
 238             vanilla_config='mx5_defconfig'
 239         else
 240             vanilla_config='mx51_defconfig'
 241         fi
 242     fi
 243
 244     if { verlt "${kversion}" "3.13"; } && [ "${vanilla_config}" = "pseries_le_defconfig" ] ; then
 245         # pseries_le_deconfig was introduced in f53e462e907cbaed29c49c0f10f5b8f614e1bf1d
 246         vanilla_config='pseries_defconfig'
 247     fi
 248
 249     # Generate kernel configuration
 250     case "$ktag" in
 251       Ubuntu*)
 252         if [ "${cross_arch}" = "powerpc" ]; then
 253           if vergte "${kversion}" "4.10"; then
 254             echo "Ubuntu removed big endian powerpc configuration from kernel >= 4.10. Don't try to build it."
 255             exit 0
 256           fi
 257         fi
 258
 259         # Disable riscv64 config generation, we don't have a toolchain on bionic
 260         sed -i 's/riscv64 //' debian.master/etc/kernelconfig
 261
 262         fakeroot debian/rules clean KW_DEFCONFIG_DIR=.
 263
 264         # Hack for kernel Ubuntu-hwe-5.8
 265         # The debian/control file is produced by the clean target above, so this
 266         # check needs to happen afterwards.
 267         if [ ! -f "debian/compat" ] && ! grep -q debhelper-compat debian/control; then
 268             echo "10" > "debian/compat"
 269         fi
 270
 271         # genconfigs check can fail in certain cases, eg. when a more recent
 272         # compiler exposes kernel configuration flags which aren't set in the
 273         # Ubuntu annotations.
 274         # In any case, the configuration will be updated with any missing values
 275         # later in our build script.
 276         fakeroot debian/rules genconfigs KW_DEFCONFIG_DIR=. do_skip_checks=true
 277         cp CONFIGS/"${ubuntu_config}" .config
 278         ;;
 279
 280       *)
 281         # Force 32bit build on i386, default is 64bit
 282         if [ "$arch" = "i386" ]; then
 283             export ARCH="i386"
 284         fi
 285
 286         make "${vanilla_config}" "${make_args[@]}"
 287         ;;
 288     esac
 289
 290     if [ "${vanilla_config}" = "pseries_defconfig" ] && [ "${cross_arch}" = "ppc64el" ] ; then
 291         # @see diff <(git show v3.13:arch/powerpc/configs/pseries_defconfig) <(git show v3.13:arch/powerpc/configs/pseries_le_defconfig)
 292         scripts/config --enable CONFIG_CPU_LITTLE_ENDIAN
 293         scripts/config --enable CONFIG_CMA
 294         scripts/config --disable CONFIG_XMON_DEFAULT
 295         # scripts/config --disable CONFIG_VIRTUALIZATION
 296         # scripts/config --disable CONFIG_KVM_BOOK3S_64
 297         scripts/config --disable CONFIG_KVM_BOOK3S_64_HV
 298     fi
 299
 300     # oldnoconfig was renamed in 4.19
 301     if vergte "$kversion" "4.19"; then
 302         update_conf_target="olddefconfig"
 303     else
 304         update_conf_target="oldnoconfig"
 305     fi
 306
 307     # Fix 'defined(@array)' was removed from recent perl
 308     if [ -f "kernel/timeconst.pl" ]; then
 309       sed -i 's/defined(\@\(.*\))/@\1/' kernel/timeconst.pl
 310     fi
 311
 312     # Fix syntax of inline assembly which is confused with C++11 raw strings on gcc >= 5
 313     if [ "$HOSTCC" != "gcc-4.8" ]; then
 314       if [ -f "arch/x86/kvm/svm.c" ]; then
 315         sed -i 's/ R"/ R "/g; s/"R"/" R "/g' arch/x86/kvm/svm.c
 316       fi
 317
 318       if [ -f "arch/x86/kvm/vmx.c" ]; then
 319         sed -i 's/ R"/ R "/g; s/"R"/" R "/g' arch/x86/kvm/vmx.c
 320       fi
 321     fi
 322
 323     if { verlt "${kversion}" "5.11"; } && { vergte "${kversion}" "4.10"; } ; then
 324         # Binutils > 2.35 strips empty symbol tables, causing obltool to fail
 325         # in certain cases when files are empty.
 326         # @see https://gitlab.com/linux-kernel/stable/-/commit/1d489151e9f9d1647110277ff77282fe4d96d09b
 327         #
 328         # There doesn't seem to be any LD/AS/AR flags to control this behaviour,
 329         # therefore patching tools/objtool/elf.c is attempted.
 330         patch_linux_kernel 1d489151e9f9d1647110277ff77282fe4d96d09b
 331         if { verlt "${kversion}" "4.18"; } ; then
 332             patch_linux_kernel e81e0724432542af8d8c702c31e9d82f57b1ff31
 333         fi
 334     fi
 335
 336     if { vergt "${selected_cc_version}" "7"; } && { vergte "${kversion}" "4.15"; } && { verlt "${kversion}" "4.17"; } ; then
 337         # Builds fail due to -Werror=restrict in pager.o and str_error_r.o
 338         if { verlt "${kversion}" "4.16"; } ; then
 339             # This is patched since objtool's Makefile doesn't respect HOSTCFLAGS
 340             # @see https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ad343a98e74e85aa91d844310e797f96fee6983b
 341             patch_linux_kernel ad343a98e74e85aa91d844310e797f96fee6983b
 342         fi
 343         if { verlt "${kversion}" "4.17"; } ; then
 344             # This is patched since objtool's Makefile doesn't respect HOSTCFLAGS
 345             # @see https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=854e55ad289ef8888e7991f0ada85d5846f5afb9
 346             patch_linux_kernel 854e55ad289ef8888e7991f0ada85d5846f5afb9
 347         fi
 348
 349         # Duplicate decalarations of __force_order
 350         # @see https://gitlab.com/linux-kernel/stable/-/commit/df6d4f9db79c1a5d6f48b59db35ccd1e9ff9adfc
 351         # However, kaslr_64.c doesn't exit in 4.15, 4.16, it's named pagetable.c
 352         if [ -f arch/x86/boot/compressed/pagetable.c ] ; then
 353             sed -i '/^unsigned long __force_order;$/d' arch/x86/boot/compressed/pagetable.c
 354         fi
 355     fi
 356
 357     if { vergte "${kversion}" "4.15"; } && { verlt "${kversion}" "4.18"; } ; then
 358         # Some old kernels fail to build when make is too new
 359         # @see https://gitlab.com/linux-kernel/stable/-/commit/9feeb638cde083c737e295c0547f1b4f28e99583
 360         patch_linux_kernel 9564a8cf422d7b58f6e857e3546d346fa970191e
 361         # @see https://gitlab.com/linux-kernel/stable/-/commit/9feeb638cde083c737e295c0547f1b4f28e99583
 362         patch_linux_kernel 9feeb638cde083c737e295c0547f1b4f28e99583
 363     fi
 364
 365     if { vergte "${kversion}" "4.12"; } && { verlt "${kversion}" "4.19"; } ; then
 366         # Old kernels can fail to build while on newer host kernels with errors
 367         # such as:
 368         #   In file included from scripts/selinux/genheaders/genheaders.c:19:
 369         #   ./security/selinux/include/classmap.h:249:2: error: #error New address family defined, please update secclass_map.
 370         # @see https://gitlab.com/linux-kernel/stable/-/commit/dfbd199a7cfe3e3cd8531e1353cdbd7175bfbc5e
 371         #
 372         patch_linux_kernel dfbd199a7cfe3e3cd8531e1353cdbd7175bfbc5e
 373     fi
 374
 375     if { vergte "${kversion}" "3.18"; } && { verlt "${kversion}" "4.4"; } ; then
 376         # Compatibility with binutils >= ~ 2.31
 377         patch_linux_kernel b21ebf2fb4cde1618915a97cc773e287ff49173e
 378     fi
 379
 380     # The above patch only partially applies linux 3.17, and has been, so a
 381     # rebased version is used instead.
 382     if { vergte "${kversion}" "3.17"; } && { verlt "${kversion}" "3.18"; } ; then
 383         cat <<'EOF' | patch -p1
 384 diff --git a/arch/x86/kernel/machine_kexec_64.c b/arch/x86/kernel/machine_kexec_64.c
 385 index 48598105..0652c5b6 100644
 386 --- a/arch/x86/kernel/machine_kexec_64.c
 387 +++ b/arch/x86/kernel/machine_kexec_64.c
 388 @@ -516,6 +516,7 @@ int arch_kexec_apply_relocations_add(const Elf64_Ehdr *ehdr,
 389                                 goto overflow;
 390                         break;
 391                 case R_X86_64_PC32:
 392 +               case R_X86_64_PLT32:
 393                         value -= (u64)address;
 394                         *(u32 *)location = value;
 395                         break;
 396 diff --git a/arch/x86/kernel/module.c b/arch/x86/kernel/module.c
 397 index e69f9882..7c6bc9fe 100644
 398 --- a/arch/x86/kernel/module.c
 399 +++ b/arch/x86/kernel/module.c
 400 @@ -180,6 +180,7 @@ int apply_relocate_add(Elf64_Shdr *sechdrs,
 401                                 goto overflow;
 402                         break;
 403                 case R_X86_64_PC32:
 404 +               case R_X86_64_PLT32:
 405                         val -= (u64)loc;
 406                         *(u32 *)loc = val;
 407  #if 0
 408 diff --git a/arch/x86/tools/relocs.c b/arch/x86/tools/relocs.c
 409 index bbb1d225..8deeacbc 100644
 410 --- a/arch/x86/tools/relocs.c
 411 +++ b/arch/x86/tools/relocs.c
 412 @@ -763,6 +763,7 @@ static int do_reloc64(struct section *sec, Elf_Rel *rel, ElfW(Sym) *sym,
 413         switch (r_type) {
 414         case R_X86_64_NONE:
 415         case R_X86_64_PC32:
 416 +       case R_X86_64_PLT32:
 417                 /*
 418                  * NONE can be ignored and PC relative relocations don't
 419                  * need to be adjusted.
 420 EOF
 421     fi
 422
 423     if ( { vergte "${kversion}" "3.15"; } && { verlt "${kversion}" "4.4"; } ) ||
 424        ( { vergte "${kversion}" "4.15"; } && { verlt "${kversion}" "4.17"; } ); then
 425         # While the original motivation of this patch is for fixing builds using
 426         # clang, the same error occurs between linux >= 3.15 and < 4.4, and in
 427         # 4.15, 4.16.
 428         #
 429         # This patch only partially applies due to changes in kernel/Makefile,
 430         # so a supplementary patch is needed
 431         #
 432         # Without this patch, builds fail with
 433         #   Cannot find symbol for section 2: .text.
 434         #   kernel/elfcore.o: failed
 435         #
 436         # @see https://github.com/linuxppc/issues/issues/388
 437         # @see https://lore.kernel.org/lkml/20201204165742.3815221-2-arnd@kernel.org/
 438         #
 439         patch_linux_kernel 6e7b64b9dd6d96537d816ea07ec26b7dedd397b9
 440         if grep -q elfcore.o kernel/Makefile ; then
 441             sed -i '/^.* += elfcore.o$/d' kernel/Makefile
 442         fi
 443     fi
 444
 445     # Newer binutils don't accept 3 operand 'cmp' instructions on ppc64
 446     # Convert them to 'cmpw' which was previously done silently
 447     if verlt "$kversion" "4.9"; then
 448             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/"
 449             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/"
 450             sed -i "s/\$pie \-o \"\$ofile\"/\$pie --no-dynamic-linker -o \"\$ofile\"/" arch/powerpc/boot/wrapper
 451     fi
 452
 453     # Fix a typo in v2.6.36.x
 454     if [ -f "arch/x86/kernel/entry_64.S" ]; then
 455       sed -i 's/END(do_hypervisor_callback)/END(xen_do_hypervisor_callback)/' arch/x86/kernel/entry_64.S
 456     fi
 457
 458     # Fix compiler switch in vdso Makefile for 2.6.36 to 2.6.36.2
 459     if { vergte "$kversion" "2.6.36" && verlte "$kversion" "2.6.36.3"; }; then
 460       sed -i 's/-m elf_x86_64/-m64/' arch/x86/vdso/Makefile
 461       sed -i 's/-m elf_i386/-m32/' arch/x86/vdso/Makefile
 462     fi
 463
 464     # Fix kernel < 3.0 with gcc >= 4.7
 465     if verlt "$kversion" "3.0"; then
 466       sed -i '/linux\/compiler.h/a #include <linux\/linkage.h> \/* For asmregparm *\/' arch/x86/include/asm/ptrace.h
 467       sed -i 's/extern long syscall_trace_enter/extern asmregparm long syscall_trace_enter/' arch/x86/include/asm/ptrace.h
 468       sed -i 's/extern void syscall_trace_leave/extern asmregparm void syscall_trace_leave/' arch/x86/include/asm/ptrace.h
 469       echo "header-y += linkage.h" >> include/linux/Kbuild
 470     fi
 471
 472     if [ "${cross_arch}" = "powerpc" ] ; then
 473         if { vergte "${kversion}" "4.15"; } && { verlt "${kversion}" "4.16"; } ; then
 474             # Avoid register errors such as
 475             # aes_generic.c:(.text+0x4e0): undefined reference to `_restgpr_31_x'
 476             # @see https://gitlab.com/linux-kernel/stable/-/commit/148b974deea927f5dbb6c468af2707b488bfa2de
 477             make_args+=(
 478                 CFLAGS_aes_generic.o=''
 479             )
 480         fi
 481     fi
 482
 483     if [ "$(scripts/config --state CONFIG_DEBUG_INFO_BTF)" == "y" ] &&
 484            { vergte "${pahole_version}" "1.24"; } &&
 485            { vergte "${kversion}" "5.10"; } && { verlt "${kversion}" "6.0"; } ;then
 486         # Some kernels Eg. Ubuntu-hwe-5.13-5.13.0-52.59_20.04.1
 487         # fail with the following error:
 488         #   BTFIDS  vmlinux
 489         #   FAILED: load BTF from vmlinux: Invalid argument
 490         #
 491         # When CONFIG_DEBUG_INFO_BTF is set, certain versions of pahole require
 492         # `--skip_encoding_btf_enum64` to be passed as the kernel doesn't define
 493         # BTF_KIND_ENUM64.
 494         #
 495         # Introduced in 341dfcf8d78eaa3a2dc96dea06f0392eb2978364 (~v5.10)
 496         # @see https://lore.kernel.org/bpf/20220825171620.cioobudss6ovyrkc@altlinux.org/t/
 497         #
 498         if [ -f "scripts/pahole-flags.sh" ] ; then
 499             sed -i 's/ -J ${PAHOLE_FLAGS} / -J ${PAHOLE_FLAGS} --skip_encoding_btf_enum64 /' scripts/link-vmlinux.sh
 500         else
 501             sed -i 's/ -J ${extra_paholeopt} / -J ${extra_paholeopt} --skip_encoding_btf_enum64 /' scripts/link-vmlinux.sh
 502         fi
 503     fi
 504
 505     # GCC 4.8
 506     if [ "$HOSTCC" == "gcc-4.8" ]; then
 507         scripts/config --disable CONFIG_CC_STACKPROTECTOR_STRONG
 508         scripts/config --disable CONFIG_PPC_OF_BOOT_TRAMPOLINE
 509     fi
 510
 511     # Don't try to sign modules
 512     scripts/config --disable CONFIG_MODULE_SIG
 513
 514     # Disable kernel stack frame correctness validation, introduced in 4.6.0 and currently fails
 515     scripts/config --disable CONFIG_STACK_VALIDATION
 516
 517     # Cause problems with inline assembly on i386
 518     scripts/config --disable CONFIG_DEBUG_SECTION_MISMATCH
 519
 520     # Don't build samples, they are broken on some kernel releases
 521     scripts/config --disable CONFIG_SAMPLES
 522     scripts/config --disable CONFIG_BUILD_DOCSRC
 523
 524     # Disable kcov
 525     scripts/config --disable CONFIG_KCOV
 526
 527     # Broken on some RT kernels
 528     scripts/config --disable CONFIG_HYPERV
 529
 530     # Broken drivers
 531     scripts/config --disable CONFIG_RAPIDIO_TSI721
 532     scripts/config --disable CONFIG_SGI_XP
 533     scripts/config --disable CONFIG_MFD_WM8994
 534     scripts/config --disable CONFIG_DRM_RADEON
 535     scripts/config --disable CONFIG_SND_SOC_WM5100
 536     # More recent compiler optimizations (from gcc 8 onwards )expose build errors
 537     # with netronome on older kernels.
 538     # Observed in 4.11-rt, 4.15-4.17, 5.0-rt - 5.16-rt
 539     # It seems easier to disable the driver than to attempt patching.
 540     # Eg.
 541     #   In function ‘ur_load_imm_any’,
 542     #   inlined from ‘jeq_imm’ at drivers/net/ethernet/netronome/nfp/bpf/jit.c:3146:13:
 543     #   ./include/linux/compiler.h:350:45: error: call to ‘__compiletime_assert_1062’ declared with attribute error: FIELD_FIT: value too large for the field
 544     #   350 |         _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
 545     #
 546     scripts/config --disable CONFIG_NET_VENDOR_NETRONOME
 547     # Eg.
 548     #  In function ‘memcpy’,
 549     #  inlined from ‘kszphy_get_strings’ at drivers/net/phy/micrel.c:664:3:
 550     #  ./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
 551     #  305 |                         __read_overflow2();
 552     #      |                         ^~~~~~~~~~~~~~~~~~
 553     #  make[3]: *** [scripts/Makefile.build:308: drivers/net/phy/micrel.o] Error 1
 554     #
 555     scripts/config --disable CONFIG_MICREL_PHY
 556
 557
 558     # IGBVF won't build with recent gcc on 2.6.38.x
 559     if { vergte "$kversion" "2.6.37" && verlt "$kversion" "2.6.38"; }; then
 560       scripts/config --disable CONFIG_IGBVF
 561     fi
 562
 563     # Don't fail the build on warnings
 564     scripts/config --disable CONFIG_WERROR
 565     scripts/config --enable CONFIG_PPC_DISABLE_WERROR
 566
 567     # Set required options
 568     scripts/config --enable CONFIG_TRACEPOINTS
 569     scripts/config --enable CONFIG_KALLSYMS
 570     scripts/config --enable CONFIG_HIGH_RES_TIMERS
 571     scripts/config --enable CONFIG_KPROBES
 572     scripts/config --enable CONFIG_FTRACE
 573     scripts/config --enable CONFIG_BLK_DEV_IO_TRACE
 574     scripts/config --enable CONFIG_KALLSYMS_ALL
 575     scripts/config --enable CONFIG_HAVE_SYSCALL_TRACEPOINTS
 576     scripts/config --enable CONFIG_PERF_EVENTS
 577     scripts/config --enable CONFIG_EVENT_TRACING
 578     scripts/config --enable CONFIG_KRETPROBES
 579
 580     if [ -n "${DEBUG}" ] ; then
 581         cat .config
 582     fi
 583
 584     make "$update_conf_target" "${make_args[@]}"
 585     make -j"$NPROC" "${make_args[@]}"
 586
 587     krelease=$(make -s kernelrelease "${make_args[@]}")
 588
 589     # Save the kernel and modules
 590     mkdir -p "$LINUX_INSTOBJ_DIR/boot"
 591     make INSTALL_MOD_PATH="$LINUX_INSTOBJ_DIR" INSTALL_MOD_STRIP=1 modules_install "${make_args[@]}"
 592     make INSTALL_MOD_PATH="$LINUX_INSTOBJ_DIR" INSTALL_PATH="$LINUX_INSTOBJ_DIR/boot" install "${make_args[@]}"
 593     rm -f "$LINUX_INSTOBJ_DIR/lib/modules/${krelease}/source" "$LINUX_INSTOBJ_DIR/lib/modules/${krelease}/build"
 594     ln -s ../../../../sources "$LINUX_INSTOBJ_DIR/lib/modules/${krelease}/source"
 595     ln -s ../../../../sources "$LINUX_INSTOBJ_DIR/lib/modules/${krelease}/source"
 596 }
 597
 598
 599 extract_distro_headers() {
 600
 601     # Enter linux source dir
 602     cd "${LINUX_SRCOBJ_DIR}"
 603
 604
 605     # For RT kernels, copy version file
 606     if [ -s localversion-rt ]; then
 607         cp -a localversion-rt "${LINUX_HDROBJ_DIR}"
 608     fi
 609
 610     # Copy all Makefile related stuff
 611     find . -path './include/*' -prune \
 612         -o -path './scripts/*' -prune -o -type f \
 613         \( -name 'Makefile*' -o -name 'Kconfig*' -o -name 'Kbuild*' -o \
 614             -name '*.sh' -o -name '*.pl' -o -name '*.lds' \) \
 615         -print | cpio -pd --preserve-modification-time "${LINUX_HDROBJ_DIR}"
 616
 617     # Copy base scripts and include dirs
 618     cp -a scripts include "${LINUX_HDROBJ_DIR}"
 619
 620     # Copy arch includes
 621     (find arch -name include -type d -print0 | \
 622         xargs -0 -n1 -i: find : -type f) | \
 623         cpio -pd --preserve-modification-time "${LINUX_HDROBJ_DIR}"
 624
 625     # Copy arch scripts
 626     (find arch -name scripts -type d -print0 | \
 627         xargs -0 -n1 -i: find : -type f) | \
 628         cpio -pd --preserve-modification-time "${LINUX_HDROBJ_DIR}"
 629
 630     # Cleanup scripts
 631     rm -f "${LINUX_HDROBJ_DIR}/scripts/*.o"
 632     rm -f "${LINUX_HDROBJ_DIR}/scripts/*/*.o"
 633
 634     # On powerpc 32bits this object is required to link modules
 635     if [ "${karch}" = "powerpc" ]; then
 636         if [ "x$(scripts/config -s CONFIG_PPC64)" = "xy" ] && vergte "${kversion}" "5.4"; then
 637             :
 638         else
 639             cp -a --parents arch/powerpc/lib/crtsavres.[So] "${LINUX_HDROBJ_DIR}/"
 640         fi
 641     fi
 642
 643     # On arm64 between 4.13 and 1.15 this object is required to build with ftrace support
 644     if [ "${karch}" = "arm64" ]; then
 645         if [ -f "arch/arm64/kernel/ftrace-mod.S" ]; then
 646             cp -a --parents arch/arm64/kernel/ftrace-mod.[So] "${LINUX_HDROBJ_DIR}/"
 647         fi
 648     fi
 649
 650     # Newer kernels need objtool to build modules when CONFIG_STACK_VALIDATION=y
 651     if [ -f tools/objtool/objtool ]; then
 652       cp -a --parents tools/objtool/objtool "${LINUX_HDROBJ_DIR}/"
 653     fi
 654
 655     if [ -f "arch/x86/kernel/macros.s" ]; then
 656       cp -a --parents arch/x86/kernel/macros.s "${LINUX_HDROBJ_DIR}/"
 657     fi
 658
 659     # Copy modules related stuff, if available
 660     if [ -s Module.symvers ]; then
 661         cp Module.symvers "${LINUX_HDROBJ_DIR}"
 662     fi
 663
 664     if [ -s System.map ]; then
 665         cp System.map "${LINUX_HDROBJ_DIR}"
 666     fi
 667
 668     if [ -s Module.markers ]; then
 669         cp Module.markers "${LINUX_HDROBJ_DIR}"
 670     fi
 671
 672     # Copy config file
 673     cp .config "${LINUX_HDROBJ_DIR}"
 674
 675     # Make sure the Makefile and version.h have a matching timestamp so that
 676     # external modules can be built
 677     if [ -s "${LINUX_HDROBJ_DIR}/include/generated/uapi/linux/version.h" ]; then
 678         touch -r "${LINUX_HDROBJ_DIR}/Makefile" "${LINUX_HDROBJ_DIR}/include/generated/uapi/linux/version.h"
 679     elif [ -s "${LINUX_HDROBJ_DIR}/include/linux/version.h" ]; then
 680         touch -r "${LINUX_HDROBJ_DIR}/Makefile" "${LINUX_HDROBJ_DIR}/include/linux/version.h"
 681     else
 682         echo "Missing version.h"
 683         exit 1
 684     fi
 685     touch -r "${LINUX_HDROBJ_DIR}/.config" "${LINUX_HDROBJ_DIR}/include/generated/autoconf.h"
 686
 687     # Copy .config to include/config/auto.conf so "make prepare" is unnecessary.
 688     if [ ! -f "${LINUX_HDROBJ_DIR}/include/config/auto.conf" ]; then
 689         cp "${LINUX_HDROBJ_DIR}/.config" "${LINUX_HDROBJ_DIR}/include/config/auto.conf"
 690     fi
 691
 692     # Finally clean the object files from the full source tree
 693     make clean
 694
 695     # And regen the modules support files
 696     make modules_prepare "${make_args[@]}"
 697
 698     # On powerpc 32bits this object is required to link modules
 699     if [ "${karch}" = "powerpc" ]; then
 700         if [ "x$(scripts/config -s CONFIG_PPC64)" = "xy" ] && vergte "${kversion}" "5.4"; then
 701             :
 702         else
 703             make arch/powerpc/lib/crtsavres.o "${make_args[@]}"
 704         fi
 705     fi
 706
 707     # On arm64 between 4.13 and 4.15 this object is required to build with ftrace support
 708     if [ "${karch}" = "arm64" ]; then
 709         if [ -f "arch/arm64/kernel/ftrace-mod.S" ]; then
 710             make arch/arm64/kernel/ftrace-mod.o "${make_args[@]}"
 711         fi
 712     fi
 713
 714     # Version specific tasks
 715     case "$ktag" in
 716       Ubuntu*)
 717         # Add Ubuntu ABI number to kernel headers, this is normally done by the packaging code
 718         ABINUM="$(echo "$ktag" | grep -P -o 'Ubuntu-(lts-)?.*-\K\d+(?=\..*)')"
 719         echo "#define UTS_UBUNTU_RELEASE_ABI $ABINUM" >> include/generated/utsrelease.h
 720         echo "#define UTS_UBUNTU_RELEASE_ABI $ABINUM" >> "${LINUX_HDROBJ_DIR}/include/generated/utsrelease.h"
 721         ;;
 722     esac
 723 }
 724
 725
 726 build_modules() {
 727
 728     local kdir="$1"
 729     local outdir="$2"
 730     local kversion
 731
 732     kversion=$(make -C "$LINUX_HDROBJ_DIR" -s kernelversion)
 733
 734     # Try to catch some compatibility problems by turning some
 735     # warnings into errors.
 736     #export KCFLAGS="$KCFLAGS -Wall -Werror"
 737
 738     # Enter lttng-modules source dir
 739     cd "${MODULES_GIT_DIR}"
 740
 741     # kernels 3.10 to 3.10.13 and 3.11 to 3.11.2 introduce a deadlock in the
 742     # timekeeping subsystem. We want those build to fail.
 743     if { vergte "$kversion" "3.10" && verlte "$kversion" "3.10.13"; } || \
 744        { vergte "$kversion" "3.11" && verlte "$kversion" "3.11.2"; }; then
 745
 746         set +e
 747
 748         # Build modules
 749         KERNELDIR="${kdir}" make -j"${NPROC}" V=1 "${make_args[@]}"
 750         ret=$?
 751
 752         set -e
 753
 754         # We expect this build to fail, if it doesn't, fail the job.
 755         if [ "$ret" -eq 0 ]; then
 756             echo "This build should have failed."
 757             exit 1
 758         fi
 759
 760         # We have to publish at least one file or the build will fail
 761         echo "This kernel is broken, there is a deadlock in the timekeeping subsystem." > "${outdir}/BROKEN.txt.ko"
 762
 763         KERNELDIR="${kdir}" make clean
 764
 765     else # Regular build
 766
 767         # Build modules against full kernel sources
 768         KERNELDIR="${kdir}" make -j"${NPROC}" V=1 "${make_args[@]}"
 769
 770         # Install modules to build dir
 771         KERNELDIR="${kdir}" make INSTALL_MOD_PATH="${outdir}" modules_install
 772
 773         # Clean build dir
 774         KERNELDIR="${kdir}" make clean
 775     fi
 776 }
 777
 778
 779 ## MAIN ##
 780
 781 # Use all CPU cores
 782 NPROC=$(nproc)
 783
 784 MODULES_GIT_DIR="${WORKSPACE}/src/lttng-modules"
 785 LINUX_GIT_DIR="${WORKSPACE}/src/linux"
 786
 787 LINUX_OBJ_DIR="${WORKSPACE}/linux"
 788 LINUX_SRCOBJ_DIR="${LINUX_OBJ_DIR}/sources"
 789 LINUX_HDROBJ_DIR="${LINUX_OBJ_DIR}/headers"
 790 LINUX_INSTOBJ_DIR="${LINUX_OBJ_DIR}/install"
 791
 792 MODULES_OUTPUT_KSRC_DIR="${WORKSPACE}/build/lttng-modules-ksrc"
 793 MODULES_OUTPUT_KHDR_DIR="${WORKSPACE}/build/lttng-modules-khdr"
 794
 795 LINUX_GIT_REF_REPO_DIR="$HOME/gitcache/linux-stable.git/"
 796
 797 OBJ_STORE_URL="s3://jenkins"
 798
 799 cd "$WORKSPACE"
 800
 801 # Create build directories
 802 mkdir -p "${LINUX_SRCOBJ_DIR}" "${LINUX_HDROBJ_DIR}" "${LINUX_INSTOBJ_DIR}" "${MODULES_OUTPUT_KSRC_DIR}" "${MODULES_OUTPUT_KHDR_DIR}"
 803
 804 git_clone_modules_sources
 805
 806 # Setup cross compile env if available
 807 if [ "x${cross_arch}" != "x" ]; then
 808
 809     case "$cross_arch" in
 810         "armhf")
 811             karch="arm"
 812             cross_compile="arm-linux-gnueabihf-"
 813             vanilla_config="imx_v6_v7_defconfig"
 814             ubuntu_config="armhf-config.flavour.generic"
 815             ;;
 816
 817         "arm64")
 818             karch="arm64"
 819             cross_compile="aarch64-linux-gnu-"
 820             vanilla_config="defconfig"
 821             ubuntu_config="arm64-config.flavour.generic"
 822             ;;
 823
 824         "powerpc")
 825             karch="powerpc"
 826             cross_compile="powerpc-linux-gnu-"
 827             vanilla_config="ppc44x_defconfig"
 828             ubuntu_config="powerpc-config.flavour.powerpc-smp"
 829             ;;
 830
 831         "ppc64el")
 832             karch="powerpc"
 833             cross_compile="powerpc64le-linux-gnu-"
 834             vanilla_config="pseries_le_defconfig"
 835             ubuntu_config="ppc64el-config.flavour.generic"
 836             ;;
 837
 838         *)
 839             echo "Unsupported cross arch $cross_arch"
 840             exit 1
 841             ;;
 842     esac
 843
 844     # Export variables used by Kbuild for cross compilation
 845     export ARCH="${karch}"
 846     export CROSS_COMPILE="${cross_compile}"
 847
 848 # Set arch specific values if we are not cross compiling
 849 elif [ "x${arch}" != "x" ]; then
 850
 851     case "$arch" in
 852         "i386")
 853             karch="x86"
 854             vanilla_config="allmodconfig"
 855             ubuntu_config="i386-config.flavour.generic"
 856             ;;
 857
 858         "amd64")
 859             karch="x86"
 860             vanilla_config="allmodconfig"
 861             ubuntu_config="amd64-config.flavour.generic"
 862             ;;
 863
 864         "armhf")
 865             karch="arm"
 866             vanilla_config="allmodconfig"
 867             ubuntu_config="armhf-config.flavour.generic"
 868             ;;
 869
 870         "arm64")
 871             karch="arm64"
 872             vanilla_config="allmodconfig"
 873             ubuntu_config="arm64-config.flavour.generic"
 874             ;;
 875
 876         "powerpc")
 877             karch="powerpc"
 878             vanilla_config="allmodconfig"
 879             ubuntu_config="powerpc-config.flavour.powerpc-smp"
 880             ;;
 881
 882         "ppc64el")
 883             karch="powerpc"
 884             vanilla_config="allmodconfig"
 885             ubuntu_config="ppc64el-config.flavour.generic"
 886             ;;
 887
 888         *)
 889             echo "Unsupported arch $arch"
 890             exit 1
 891             ;;
 892     esac
 893 else
 894     echo "No arch or cross_arch specified"
 895     exit 1
 896 fi
 897
 898
 899
 900 # First get the kernel build from the object store, or build it, if it's
 901 # not available.
 902
 903 echo "# Setup endpoint
 904 host_base = obj.internal.efficios.com
 905 host_bucket = obj.internal.efficios.com
 906 bucket_location = us-east-1
 907 use_https = True
 908
 909 # Setup access keys
 910 access_key = jenkins
 911 secret_key = echo123456
 912
 913 # Enable S3 v4 signature APIs
 914 signature_v2 = False" > "$WORKSPACE/.s3cfg"
 915
 916 url_hash="$(echo -n "$kgitrepo" | md5sum | awk '{ print $1 }')"
 917 obj_name="linux.tar.bz2"
 918
 919 if [ "x${cross_arch}" = "x" ]; then
 920         obj_url_prefix="$OBJ_STORE_URL/linux-build/$url_hash/$ktag/platform-${platforms}/$arch/native"
 921 else
 922         obj_url_prefix="$OBJ_STORE_URL/linux-build/$url_hash/$ktag/platform-${platforms}/${cross_arch}"
 923 fi
 924
 925 obj_url="$obj_url_prefix/$obj_name"
 926
 927 set +e
 928 # In s3cmd 2.3, the return code of get when an object does not exist (64)
 929 # is different than in 2.2 (12). The return codes of 's3cmd info' are
 930 # consistent between 2.2 and 2.3.
 931 s3cmd -c "$WORKSPACE/.s3cfg" info "$obj_url"
 932 ret=$?
 933 set -e
 934
 935 case "$ret" in
 936     "0")
 937       s3cmd -c "$WORKSPACE/.s3cfg" get "$obj_url"
 938       extract_archive_obj
 939       ;;
 940
 941     "12")
 942       echo "File not found"
 943
 944       # Build all the things and upload
 945       # then finish the module build...
 946
 947       git_clone_linux_sources
 948       git_export_linux_sources
 949
 950       select_compiler
 951
 952       ## PREPARE FULL LINUX SOURCE TREE
 953       build_linux_kernel
 954
 955       ## EXTRACT DISTRO STYLE KERNEL HEADERS / DEVEL
 956       extract_distro_headers
 957
 958       tar_archive_obj
 959
 960       upload_archive_obj
 961
 962       ;;
 963
 964     *)
 965       echo "Unknown error? Abort"
 966       exit 1
 967       ;;
 968 esac
 969
 970 select_compiler
 971
 972 selected_cc_version="$(echo "${selected_cc}" | cut -d'-' -f2)"
 973 # lttng-modules requires gcc >= 5.1 for aarch64
 974 # @see https://github.com/lttng/lttng-modules/commit/be06402dbdbea2f3394e60ec15c5d3356e2be416
 975 if { verlt "${selected_cc_version}" "5.1"; } && [ "${cross_arch}" = "arm64" ] ; then
 976     echo "Building lltng-modules on aarch64 requires gcc >= 5.1"
 977     exit 0
 978 fi
 979
 980 ## BUILD modules
 981 # Either we downloaded a pre-build kernel or we built it and uploaded
 982 # the archive for future builds.
 983
 984 cd "$WORKSPACE"
 985
 986 # Build modules against full kernel sources
 987 build_modules "${LINUX_SRCOBJ_DIR}" "${MODULES_OUTPUT_KSRC_DIR}"
 988
 989 # Build modules against kernel headers
 990 build_modules "${LINUX_HDROBJ_DIR}" "${MODULES_OUTPUT_KHDR_DIR}"
 991
 992 # Make sure some modules were actually built
 993 tree "${MODULES_OUTPUT_KSRC_DIR}"
 994 if [ "x$(find "${MODULES_OUTPUT_KSRC_DIR}" -name '*.ko*' -printf yes -quit)" != "xyes" ]; then
 995   echo "No modules built!"
 996   exit 1
 997 fi
 998
 999 tree "${MODULES_OUTPUT_KHDR_DIR}"
1000 if [ "x$(find "${MODULES_OUTPUT_KHDR_DIR}" -name '*.ko*' -printf yes -quit)" != "xyes" ]; then
1001   echo "No modules built!"
1002   exit 1
1003 fi
1004
1005 # EOF