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 "${kversion}" "4.17"; } ; then
 344             # This is patched since objtool's Makefile doesn't respect HOSTCFLAGS
 345             # @see https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=854e55ad289ef8888e7991f0ada85d5846f5afb9
 346             patch_linux_kernel 854e55ad289ef8888e7991f0ada85d5846f5afb9
 347         fi
 348
 349         # More recent compiler optimizations expose build errors with netronome.
 350         # It seems easier to disable the driver than to attempt patching.
 351         scripts/config --disable CONFIG_NET_VENDOR_NETRONOME
 352         scripts/config --disable CONFIG_MICREL_PHY
 353
 354         # Duplicate decalarations of __force_order
 355         # @see https://gitlab.com/linux-kernel/stable/-/commit/df6d4f9db79c1a5d6f48b59db35ccd1e9ff9adfc
 356         # However, kaslr_64.c doesn't exit in 4.15, 4.16, it's named pagetable.c
 357         if [ -f arch/x86/boot/compressed/pagetable.c ] ; then
 358             sed -i '/^unsigned long __force_order;$/d' arch/x86/boot/compressed/pagetable.c
 359         fi
 360     fi
 361
 362     if { vergte "${kversion}" "4.15"; } && { verlt "${kversion}" "4.18"; } ; then
 363         # Some old kernels fail to build when make is too new
 364         # @see https://gitlab.com/linux-kernel/stable/-/commit/9feeb638cde083c737e295c0547f1b4f28e99583
 365         patch_linux_kernel 9564a8cf422d7b58f6e857e3546d346fa970191e
 366         # @see https://gitlab.com/linux-kernel/stable/-/commit/9feeb638cde083c737e295c0547f1b4f28e99583
 367         patch_linux_kernel 9feeb638cde083c737e295c0547f1b4f28e99583
 368     fi
 369
 370     if { vergte "${kversion}" "4.12"; } && { verlt "${kversion}" "4.19"; } ; then
 371         # Old kernels can fail to build while on newer host kernels with errors
 372         # such as:
 373         #   In file included from scripts/selinux/genheaders/genheaders.c:19:
 374         #   ./security/selinux/include/classmap.h:249:2: error: #error New address family defined, please update secclass_map.
 375         # @see https://gitlab.com/linux-kernel/stable/-/commit/dfbd199a7cfe3e3cd8531e1353cdbd7175bfbc5e
 376         #
 377         patch_linux_kernel dfbd199a7cfe3e3cd8531e1353cdbd7175bfbc5e
 378     fi
 379
 380     if { vergte "${kversion}" "3.18"; } && { verlt "${kversion}" "4.4"; } ; then
 381         # Compatibility with binutils >= ~ 2.31
 382         patch_linux_kernel b21ebf2fb4cde1618915a97cc773e287ff49173e
 383     fi
 384
 385     # The above patch only partially applies linux 3.17, and has been, so a
 386     # rebased version is used instead.
 387     if { vergte "${kversion}" "3.17"; } && { verlt "${kversion}" "3.18"; } ; then
 388         cat <<'EOF' | patch -p1
 389 diff --git a/arch/x86/kernel/machine_kexec_64.c b/arch/x86/kernel/machine_kexec_64.c
 390 index 48598105..0652c5b6 100644
 391 --- a/arch/x86/kernel/machine_kexec_64.c
 392 +++ b/arch/x86/kernel/machine_kexec_64.c
 393 @@ -516,6 +516,7 @@ int arch_kexec_apply_relocations_add(const Elf64_Ehdr *ehdr,
 394                                 goto overflow;
 395                         break;
 396                 case R_X86_64_PC32:
 397 +               case R_X86_64_PLT32:
 398                         value -= (u64)address;
 399                         *(u32 *)location = value;
 400                         break;
 401 diff --git a/arch/x86/kernel/module.c b/arch/x86/kernel/module.c
 402 index e69f9882..7c6bc9fe 100644
 403 --- a/arch/x86/kernel/module.c
 404 +++ b/arch/x86/kernel/module.c
 405 @@ -180,6 +180,7 @@ int apply_relocate_add(Elf64_Shdr *sechdrs,
 406                                 goto overflow;
 407                         break;
 408                 case R_X86_64_PC32:
 409 +               case R_X86_64_PLT32:
 410                         val -= (u64)loc;
 411                         *(u32 *)loc = val;
 412  #if 0
 413 diff --git a/arch/x86/tools/relocs.c b/arch/x86/tools/relocs.c
 414 index bbb1d225..8deeacbc 100644
 415 --- a/arch/x86/tools/relocs.c
 416 +++ b/arch/x86/tools/relocs.c
 417 @@ -763,6 +763,7 @@ static int do_reloc64(struct section *sec, Elf_Rel *rel, ElfW(Sym) *sym,
 418         switch (r_type) {
 419         case R_X86_64_NONE:
 420         case R_X86_64_PC32:
 421 +       case R_X86_64_PLT32:
 422                 /*
 423                  * NONE can be ignored and PC relative relocations don't
 424                  * need to be adjusted.
 425 EOF
 426     fi
 427
 428     if ( { vergte "${kversion}" "3.15"; } && { verlt "${kversion}" "4.4"; } ) ||
 429        ( { vergte "${kversion}" "4.15"; } && { verlt "${kversion}" "4.17"; } ); then
 430         # While the original motivation of this patch is for fixing builds using
 431         # clang, the same error occurs between linux >= 3.15 and < 4.4, and in
 432         # 4.15, 4.16.
 433         #
 434         # This patch only partially applies due to changes in kernel/Makefile,
 435         # so a supplementary patch is needed
 436         #
 437         # Without this patch, builds fail with
 438         #   Cannot find symbol for section 2: .text.
 439         #   kernel/elfcore.o: failed
 440         #
 441         # @see https://github.com/linuxppc/issues/issues/388
 442         # @see https://lore.kernel.org/lkml/20201204165742.3815221-2-arnd@kernel.org/
 443         #
 444         patch_linux_kernel 6e7b64b9dd6d96537d816ea07ec26b7dedd397b9
 445         if grep -q elfcore.o kernel/Makefile ; then
 446             sed -i '/^.* += elfcore.o$/d' kernel/Makefile
 447         fi
 448     fi
 449
 450     # Newer binutils don't accept 3 operand 'cmp' instructions on ppc64
 451     # Convert them to 'cmpw' which was previously done silently
 452     if verlt "$kversion" "4.9"; then
 453             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/"
 454             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/"
 455             sed -i "s/\$pie \-o \"\$ofile\"/\$pie --no-dynamic-linker -o \"\$ofile\"/" arch/powerpc/boot/wrapper
 456     fi
 457
 458     # Fix a typo in v2.6.36.x
 459     if [ -f "arch/x86/kernel/entry_64.S" ]; then
 460       sed -i 's/END(do_hypervisor_callback)/END(xen_do_hypervisor_callback)/' arch/x86/kernel/entry_64.S
 461     fi
 462
 463     # Fix compiler switch in vdso Makefile for 2.6.36 to 2.6.36.2
 464     if { vergte "$kversion" "2.6.36" && verlte "$kversion" "2.6.36.3"; }; then
 465       sed -i 's/-m elf_x86_64/-m64/' arch/x86/vdso/Makefile
 466       sed -i 's/-m elf_i386/-m32/' arch/x86/vdso/Makefile
 467     fi
 468
 469     # Fix kernel < 3.0 with gcc >= 4.7
 470     if verlt "$kversion" "3.0"; then
 471       sed -i '/linux\/compiler.h/a #include <linux\/linkage.h> \/* For asmregparm *\/' arch/x86/include/asm/ptrace.h
 472       sed -i 's/extern long syscall_trace_enter/extern asmregparm long syscall_trace_enter/' arch/x86/include/asm/ptrace.h
 473       sed -i 's/extern void syscall_trace_leave/extern asmregparm void syscall_trace_leave/' arch/x86/include/asm/ptrace.h
 474       echo "header-y += linkage.h" >> include/linux/Kbuild
 475     fi
 476
 477     if [ "${cross_arch}" = "powerpc" ] ; then
 478         if { vergte "${kversion}" "4.15"; } && { verlt "${kversion}" "4.16"; } ; then
 479             # Avoid register errors such as
 480             # aes_generic.c:(.text+0x4e0): undefined reference to `_restgpr_31_x'
 481             # @see https://gitlab.com/linux-kernel/stable/-/commit/148b974deea927f5dbb6c468af2707b488bfa2de
 482             make_args+=(
 483                 CFLAGS_aes_generic.o=''
 484             )
 485         fi
 486     fi
 487
 488     if [ "$(scripts/config --state CONFIG_DEBUG_INFO_BTF)" == "y" ] &&
 489            { vergte "${pahole_version}" "1.24"; } &&
 490            { vergte "${kversion}" "5.10"; } && { verlt "${kversion}" "6.0"; } ;then
 491         # Some kernels Eg. Ubuntu-hwe-5.13-5.13.0-52.59_20.04.1
 492         # fail with the following error:
 493         #   BTFIDS  vmlinux
 494         #   FAILED: load BTF from vmlinux: Invalid argument
 495         #
 496         # When CONFIG_DEBUG_INFO_BTF is set, certain versions of pahole require
 497         # `--skip_encoding_btf_enum64` to be passed as the kernel doesn't define
 498         # BTF_KIND_ENUM64.
 499         #
 500         # Introduced in 341dfcf8d78eaa3a2dc96dea06f0392eb2978364 (~v5.10)
 501         # @see https://lore.kernel.org/bpf/20220825171620.cioobudss6ovyrkc@altlinux.org/t/
 502         #
 503         if [ -f "scripts/pahole-flags.sh" ] ; then
 504             sed -i 's/ -J ${PAHOLE_FLAGS} / -J ${PAHOLE_FLAGS} --skip_encoding_btf_enum64 /' scripts/link-vmlinux.sh
 505         else
 506             sed -i 's/ -J ${extra_paholeopt} / -J ${extra_paholeopt} --skip_encoding_btf_enum64 /' scripts/link-vmlinux.sh
 507         fi
 508     fi
 509
 510     # GCC 4.8
 511     if [ "$HOSTCC" == "gcc-4.8" ]; then
 512         scripts/config --disable CONFIG_CC_STACKPROTECTOR_STRONG
 513         scripts/config --disable CONFIG_PPC_OF_BOOT_TRAMPOLINE
 514     fi
 515
 516     # Don't try to sign modules
 517     scripts/config --disable CONFIG_MODULE_SIG
 518
 519     # Disable kernel stack frame correctness validation, introduced in 4.6.0 and currently fails
 520     scripts/config --disable CONFIG_STACK_VALIDATION
 521
 522     # Cause problems with inline assembly on i386
 523     scripts/config --disable CONFIG_DEBUG_SECTION_MISMATCH
 524
 525     # Don't build samples, they are broken on some kernel releases
 526     scripts/config --disable CONFIG_SAMPLES
 527     scripts/config --disable CONFIG_BUILD_DOCSRC
 528
 529     # Disable kcov
 530     scripts/config --disable CONFIG_KCOV
 531
 532     # Broken on some RT kernels
 533     scripts/config --disable CONFIG_HYPERV
 534
 535     # Broken drivers
 536     scripts/config --disable CONFIG_RAPIDIO_TSI721
 537     scripts/config --disable CONFIG_SGI_XP
 538     scripts/config --disable CONFIG_MFD_WM8994
 539     scripts/config --disable CONFIG_DRM_RADEON
 540     scripts/config --disable CONFIG_SND_SOC_WM5100
 541
 542     # IGBVF won't build with recent gcc on 2.6.38.x
 543     if { vergte "$kversion" "2.6.37" && verlt "$kversion" "2.6.38"; }; then
 544       scripts/config --disable CONFIG_IGBVF
 545     fi
 546
 547     # Don't fail the build on warnings
 548     scripts/config --disable CONFIG_WERROR
 549     scripts/config --enable CONFIG_PPC_DISABLE_WERROR
 550
 551     # Set required options
 552     scripts/config --enable CONFIG_TRACEPOINTS
 553     scripts/config --enable CONFIG_KALLSYMS
 554     scripts/config --enable CONFIG_HIGH_RES_TIMERS
 555     scripts/config --enable CONFIG_KPROBES
 556     scripts/config --enable CONFIG_FTRACE
 557     scripts/config --enable CONFIG_BLK_DEV_IO_TRACE
 558     scripts/config --enable CONFIG_KALLSYMS_ALL
 559     scripts/config --enable CONFIG_HAVE_SYSCALL_TRACEPOINTS
 560     scripts/config --enable CONFIG_PERF_EVENTS
 561     scripts/config --enable CONFIG_EVENT_TRACING
 562     scripts/config --enable CONFIG_KRETPROBES
 563
 564     if [ -n "${DEBUG}" ] ; then
 565         cat .config
 566     fi
 567
 568     make "$update_conf_target" "${make_args[@]}"
 569     make -j"$NPROC" "${make_args[@]}"
 570
 571     krelease=$(make -s kernelrelease "${make_args[@]}")
 572
 573     # Save the kernel and modules
 574     mkdir -p "$LINUX_INSTOBJ_DIR/boot"
 575     make INSTALL_MOD_PATH="$LINUX_INSTOBJ_DIR" INSTALL_MOD_STRIP=1 modules_install "${make_args[@]}"
 576     make INSTALL_MOD_PATH="$LINUX_INSTOBJ_DIR" INSTALL_PATH="$LINUX_INSTOBJ_DIR/boot" install "${make_args[@]}"
 577     rm -f "$LINUX_INSTOBJ_DIR/lib/modules/${krelease}/source" "$LINUX_INSTOBJ_DIR/lib/modules/${krelease}/build"
 578     ln -s ../../../../sources "$LINUX_INSTOBJ_DIR/lib/modules/${krelease}/source"
 579     ln -s ../../../../sources "$LINUX_INSTOBJ_DIR/lib/modules/${krelease}/source"
 580 }
 581
 582
 583 extract_distro_headers() {
 584
 585     # Enter linux source dir
 586     cd "${LINUX_SRCOBJ_DIR}"
 587
 588
 589     # For RT kernels, copy version file
 590     if [ -s localversion-rt ]; then
 591         cp -a localversion-rt "${LINUX_HDROBJ_DIR}"
 592     fi
 593
 594     # Copy all Makefile related stuff
 595     find . -path './include/*' -prune \
 596         -o -path './scripts/*' -prune -o -type f \
 597         \( -name 'Makefile*' -o -name 'Kconfig*' -o -name 'Kbuild*' -o \
 598             -name '*.sh' -o -name '*.pl' -o -name '*.lds' \) \
 599         -print | cpio -pd --preserve-modification-time "${LINUX_HDROBJ_DIR}"
 600
 601     # Copy base scripts and include dirs
 602     cp -a scripts include "${LINUX_HDROBJ_DIR}"
 603
 604     # Copy arch includes
 605     (find arch -name include -type d -print0 | \
 606         xargs -0 -n1 -i: find : -type f) | \
 607         cpio -pd --preserve-modification-time "${LINUX_HDROBJ_DIR}"
 608
 609     # Copy arch scripts
 610     (find arch -name scripts -type d -print0 | \
 611         xargs -0 -n1 -i: find : -type f) | \
 612         cpio -pd --preserve-modification-time "${LINUX_HDROBJ_DIR}"
 613
 614     # Cleanup scripts
 615     rm -f "${LINUX_HDROBJ_DIR}/scripts/*.o"
 616     rm -f "${LINUX_HDROBJ_DIR}/scripts/*/*.o"
 617
 618     # On powerpc 32bits this object is required to link modules
 619     if [ "${karch}" = "powerpc" ]; then
 620         if [ "x$(scripts/config -s CONFIG_PPC64)" = "xy" ] && vergte "${kversion}" "5.4"; then
 621             :
 622         else
 623             cp -a --parents arch/powerpc/lib/crtsavres.[So] "${LINUX_HDROBJ_DIR}/"
 624         fi
 625     fi
 626
 627     # On arm64 between 4.13 and 1.15 this object is required to build with ftrace support
 628     if [ "${karch}" = "arm64" ]; then
 629         if [ -f "arch/arm64/kernel/ftrace-mod.S" ]; then
 630             cp -a --parents arch/arm64/kernel/ftrace-mod.[So] "${LINUX_HDROBJ_DIR}/"
 631         fi
 632     fi
 633
 634     # Newer kernels need objtool to build modules when CONFIG_STACK_VALIDATION=y
 635     if [ -f tools/objtool/objtool ]; then
 636       cp -a --parents tools/objtool/objtool "${LINUX_HDROBJ_DIR}/"
 637     fi
 638
 639     if [ -f "arch/x86/kernel/macros.s" ]; then
 640       cp -a --parents arch/x86/kernel/macros.s "${LINUX_HDROBJ_DIR}/"
 641     fi
 642
 643     # Copy modules related stuff, if available
 644     if [ -s Module.symvers ]; then
 645         cp Module.symvers "${LINUX_HDROBJ_DIR}"
 646     fi
 647
 648     if [ -s System.map ]; then
 649         cp System.map "${LINUX_HDROBJ_DIR}"
 650     fi
 651
 652     if [ -s Module.markers ]; then
 653         cp Module.markers "${LINUX_HDROBJ_DIR}"
 654     fi
 655
 656     # Copy config file
 657     cp .config "${LINUX_HDROBJ_DIR}"
 658
 659     # Make sure the Makefile and version.h have a matching timestamp so that
 660     # external modules can be built
 661     if [ -s "${LINUX_HDROBJ_DIR}/include/generated/uapi/linux/version.h" ]; then
 662         touch -r "${LINUX_HDROBJ_DIR}/Makefile" "${LINUX_HDROBJ_DIR}/include/generated/uapi/linux/version.h"
 663     elif [ -s "${LINUX_HDROBJ_DIR}/include/linux/version.h" ]; then
 664         touch -r "${LINUX_HDROBJ_DIR}/Makefile" "${LINUX_HDROBJ_DIR}/include/linux/version.h"
 665     else
 666         echo "Missing version.h"
 667         exit 1
 668     fi
 669     touch -r "${LINUX_HDROBJ_DIR}/.config" "${LINUX_HDROBJ_DIR}/include/generated/autoconf.h"
 670
 671     # Copy .config to include/config/auto.conf so "make prepare" is unnecessary.
 672     if [ ! -f "${LINUX_HDROBJ_DIR}/include/config/auto.conf" ]; then
 673         cp "${LINUX_HDROBJ_DIR}/.config" "${LINUX_HDROBJ_DIR}/include/config/auto.conf"
 674     fi
 675
 676     # Finally clean the object files from the full source tree
 677     make clean
 678
 679     # And regen the modules support files
 680     make modules_prepare "${make_args[@]}"
 681
 682     # On powerpc 32bits this object is required to link modules
 683     if [ "${karch}" = "powerpc" ]; then
 684         if [ "x$(scripts/config -s CONFIG_PPC64)" = "xy" ] && vergte "${kversion}" "5.4"; then
 685             :
 686         else
 687             make arch/powerpc/lib/crtsavres.o "${make_args[@]}"
 688         fi
 689     fi
 690
 691     # On arm64 between 4.13 and 4.15 this object is required to build with ftrace support
 692     if [ "${karch}" = "arm64" ]; then
 693         if [ -f "arch/arm64/kernel/ftrace-mod.S" ]; then
 694             make arch/arm64/kernel/ftrace-mod.o "${make_args[@]}"
 695         fi
 696     fi
 697
 698     # Version specific tasks
 699     case "$ktag" in
 700       Ubuntu*)
 701         # Add Ubuntu ABI number to kernel headers, this is normally done by the packaging code
 702         ABINUM="$(echo "$ktag" | grep -P -o 'Ubuntu-(lts-)?.*-\K\d+(?=\..*)')"
 703         echo "#define UTS_UBUNTU_RELEASE_ABI $ABINUM" >> include/generated/utsrelease.h
 704         echo "#define UTS_UBUNTU_RELEASE_ABI $ABINUM" >> "${LINUX_HDROBJ_DIR}/include/generated/utsrelease.h"
 705         ;;
 706     esac
 707 }
 708
 709
 710 build_modules() {
 711
 712     local kdir="$1"
 713     local outdir="$2"
 714     local kversion
 715
 716     kversion=$(make -C "$LINUX_HDROBJ_DIR" -s kernelversion)
 717
 718     # Try to catch some compatibility problems by turning some
 719     # warnings into errors.
 720     #export KCFLAGS="$KCFLAGS -Wall -Werror"
 721
 722     # Enter lttng-modules source dir
 723     cd "${MODULES_GIT_DIR}"
 724
 725     # kernels 3.10 to 3.10.13 and 3.11 to 3.11.2 introduce a deadlock in the
 726     # timekeeping subsystem. We want those build to fail.
 727     if { vergte "$kversion" "3.10" && verlte "$kversion" "3.10.13"; } || \
 728        { vergte "$kversion" "3.11" && verlte "$kversion" "3.11.2"; }; then
 729
 730         set +e
 731
 732         # Build modules
 733         KERNELDIR="${kdir}" make -j"${NPROC}" V=1 "${make_args[@]}"
 734         ret=$?
 735
 736         set -e
 737
 738         # We expect this build to fail, if it doesn't, fail the job.
 739         if [ "$ret" -eq 0 ]; then
 740             echo "This build should have failed."
 741             exit 1
 742         fi
 743
 744         # We have to publish at least one file or the build will fail
 745         echo "This kernel is broken, there is a deadlock in the timekeeping subsystem." > "${outdir}/BROKEN.txt.ko"
 746
 747         KERNELDIR="${kdir}" make clean
 748
 749     else # Regular build
 750
 751         # Build modules against full kernel sources
 752         KERNELDIR="${kdir}" make -j"${NPROC}" V=1 "${make_args[@]}"
 753
 754         # Install modules to build dir
 755         KERNELDIR="${kdir}" make INSTALL_MOD_PATH="${outdir}" modules_install
 756
 757         # Clean build dir
 758         KERNELDIR="${kdir}" make clean
 759     fi
 760 }
 761
 762
 763 ## MAIN ##
 764
 765 # Use all CPU cores
 766 NPROC=$(nproc)
 767
 768 MODULES_GIT_DIR="${WORKSPACE}/src/lttng-modules"
 769 LINUX_GIT_DIR="${WORKSPACE}/src/linux"
 770
 771 LINUX_OBJ_DIR="${WORKSPACE}/linux"
 772 LINUX_SRCOBJ_DIR="${LINUX_OBJ_DIR}/sources"
 773 LINUX_HDROBJ_DIR="${LINUX_OBJ_DIR}/headers"
 774 LINUX_INSTOBJ_DIR="${LINUX_OBJ_DIR}/install"
 775
 776 MODULES_OUTPUT_KSRC_DIR="${WORKSPACE}/build/lttng-modules-ksrc"
 777 MODULES_OUTPUT_KHDR_DIR="${WORKSPACE}/build/lttng-modules-khdr"
 778
 779 LINUX_GIT_REF_REPO_DIR="$HOME/gitcache/linux-stable.git/"
 780
 781 OBJ_STORE_URL="s3://jenkins"
 782
 783 cd "$WORKSPACE"
 784
 785 # Create build directories
 786 mkdir -p "${LINUX_SRCOBJ_DIR}" "${LINUX_HDROBJ_DIR}" "${LINUX_INSTOBJ_DIR}" "${MODULES_OUTPUT_KSRC_DIR}" "${MODULES_OUTPUT_KHDR_DIR}"
 787
 788 git_clone_modules_sources
 789
 790 # Setup cross compile env if available
 791 if [ "x${cross_arch}" != "x" ]; then
 792
 793     case "$cross_arch" in
 794         "armhf")
 795             karch="arm"
 796             cross_compile="arm-linux-gnueabihf-"
 797             vanilla_config="imx_v6_v7_defconfig"
 798             ubuntu_config="armhf-config.flavour.generic"
 799             ;;
 800
 801         "arm64")
 802             karch="arm64"
 803             cross_compile="aarch64-linux-gnu-"
 804             vanilla_config="defconfig"
 805             ubuntu_config="arm64-config.flavour.generic"
 806             ;;
 807
 808         "powerpc")
 809             karch="powerpc"
 810             cross_compile="powerpc-linux-gnu-"
 811             vanilla_config="ppc44x_defconfig"
 812             ubuntu_config="powerpc-config.flavour.powerpc-smp"
 813             ;;
 814
 815         "ppc64el")
 816             karch="powerpc"
 817             cross_compile="powerpc64le-linux-gnu-"
 818             vanilla_config="pseries_le_defconfig"
 819             ubuntu_config="ppc64el-config.flavour.generic"
 820             ;;
 821
 822         *)
 823             echo "Unsupported cross arch $cross_arch"
 824             exit 1
 825             ;;
 826     esac
 827
 828     # Export variables used by Kbuild for cross compilation
 829     export ARCH="${karch}"
 830     export CROSS_COMPILE="${cross_compile}"
 831
 832 # Set arch specific values if we are not cross compiling
 833 elif [ "x${arch}" != "x" ]; then
 834
 835     case "$arch" in
 836         "i386")
 837             karch="x86"
 838             vanilla_config="allmodconfig"
 839             ubuntu_config="i386-config.flavour.generic"
 840             ;;
 841
 842         "amd64")
 843             karch="x86"
 844             vanilla_config="allmodconfig"
 845             ubuntu_config="amd64-config.flavour.generic"
 846             ;;
 847
 848         "armhf")
 849             karch="arm"
 850             vanilla_config="allmodconfig"
 851             ubuntu_config="armhf-config.flavour.generic"
 852             ;;
 853
 854         "arm64")
 855             karch="arm64"
 856             vanilla_config="allmodconfig"
 857             ubuntu_config="arm64-config.flavour.generic"
 858             ;;
 859
 860         "powerpc")
 861             karch="powerpc"
 862             vanilla_config="allmodconfig"
 863             ubuntu_config="powerpc-config.flavour.powerpc-smp"
 864             ;;
 865
 866         "ppc64el")
 867             karch="powerpc"
 868             vanilla_config="allmodconfig"
 869             ubuntu_config="ppc64el-config.flavour.generic"
 870             ;;
 871
 872         *)
 873             echo "Unsupported arch $arch"
 874             exit 1
 875             ;;
 876     esac
 877 else
 878     echo "No arch or cross_arch specified"
 879     exit 1
 880 fi
 881
 882
 883
 884 # First get the kernel build from the object store, or build it, if it's
 885 # not available.
 886
 887 echo "# Setup endpoint
 888 host_base = obj.internal.efficios.com
 889 host_bucket = obj.internal.efficios.com
 890 bucket_location = us-east-1
 891 use_https = True
 892
 893 # Setup access keys
 894 access_key = jenkins
 895 secret_key = echo123456
 896
 897 # Enable S3 v4 signature APIs
 898 signature_v2 = False" > "$WORKSPACE/.s3cfg"
 899
 900 url_hash="$(echo -n "$kgitrepo" | md5sum | awk '{ print $1 }')"
 901 obj_name="linux.tar.bz2"
 902
 903 if [ "x${cross_arch}" = "x" ]; then
 904         obj_url_prefix="$OBJ_STORE_URL/linux-build/$url_hash/$ktag/platform-${platforms}/$arch/native"
 905 else
 906         obj_url_prefix="$OBJ_STORE_URL/linux-build/$url_hash/$ktag/platform-${platforms}/${cross_arch}"
 907 fi
 908
 909 obj_url="$obj_url_prefix/$obj_name"
 910
 911 set +e
 912 # In s3cmd 2.3, the return code of get when an object does not exist (64)
 913 # is different than in 2.2 (12). The return codes of 's3cmd info' are
 914 # consistent between 2.2 and 2.3.
 915 s3cmd -c "$WORKSPACE/.s3cfg" info "$obj_url"
 916 ret=$?
 917 set -e
 918
 919 case "$ret" in
 920     "0")
 921       s3cmd -c "$WORKSPACE/.s3cfg" get "$obj_url"
 922       extract_archive_obj
 923       ;;
 924
 925     "12")
 926       echo "File not found"
 927
 928       # Build all the things and upload
 929       # then finish the module build...
 930
 931       git_clone_linux_sources
 932       git_export_linux_sources
 933
 934       select_compiler
 935
 936       ## PREPARE FULL LINUX SOURCE TREE
 937       build_linux_kernel
 938
 939       ## EXTRACT DISTRO STYLE KERNEL HEADERS / DEVEL
 940       extract_distro_headers
 941
 942       tar_archive_obj
 943
 944       upload_archive_obj
 945
 946       ;;
 947
 948     *)
 949       echo "Unknown error? Abort"
 950       exit 1
 951       ;;
 952 esac
 953
 954 select_compiler
 955
 956 selected_cc_version="$(echo "${selected_cc}" | cut -d'-' -f2)"
 957 # lttng-modules requires gcc >= 5.1 for aarch64
 958 # @see https://github.com/lttng/lttng-modules/commit/be06402dbdbea2f3394e60ec15c5d3356e2be416
 959 if { verlt "${selected_cc_version}" "5.1"; } && [ "${cross_arch}" = "arm64" ] ; then
 960     echo "Building lltng-modules on aarch64 requires gcc >= 5.1"
 961     exit 0
 962 fi
 963
 964 ## BUILD modules
 965 # Either we downloaded a pre-build kernel or we built it and uploaded
 966 # the archive for future builds.
 967
 968 cd "$WORKSPACE"
 969
 970 # Build modules against full kernel sources
 971 build_modules "${LINUX_SRCOBJ_DIR}" "${MODULES_OUTPUT_KSRC_DIR}"
 972
 973 # Build modules against kernel headers
 974 build_modules "${LINUX_HDROBJ_DIR}" "${MODULES_OUTPUT_KHDR_DIR}"
 975
 976 # Make sure some modules were actually built
 977 tree "${MODULES_OUTPUT_KSRC_DIR}"
 978 if [ "x$(find "${MODULES_OUTPUT_KSRC_DIR}" -name '*.ko*' -printf yes -quit)" != "xyes" ]; then
 979   echo "No modules built!"
 980   exit 1
 981 fi
 982
 983 tree "${MODULES_OUTPUT_KHDR_DIR}"
 984 if [ "x$(find "${MODULES_OUTPUT_KHDR_DIR}" -name '*.ko*' -printf yes -quit)" != "xyes" ]; then
 985   echo "No modules built!"
 986   exit 1
 987 fi
 988
 989 # EOF