3 # Copyright (C) 2016-2023 Michael Jeanson <mjeanson@efficios.com>
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.
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.
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/>.
21 platform
=${platforms:-}
22 cross_arch
=${cross_arch:-}
24 kgitrepo
=${kgitrepo:-}
25 mversion
=${mversion:-}
26 mgitrepo
=${mgitrepo:-}
31 # Derive arch from label if it isn't set
32 if [ -z "${arch:-}" ] ; then
33 # Labels may be platform specific, eg. jammy-amd64, deb12-armhf
34 regex
='[[:alnum:]]+-([[:alnum:]]+)'
35 if [[ "${platform}" =~
${regex} ]] ; then
36 arch
="${BASH_REMATCH[1]}"
45 # Kernel version compare functions
47 [ "$1" = "$(printf '%s\n%s' "$1" "$2" | sort -V | head -n1)" ]
51 # shellcheck disable=SC2015
52 [ "$1" = "$2" ] && return 1 || verlte
"$1" "$2"
56 [ "$1" = "$(printf '%s\n%s' "$1" "$2" | sort -V | tail -n1)" ]
60 # shellcheck disable=SC2015
61 [ "$1" = "$2" ] && return 1 || vergte
"$1" "$2"
71 message_len
="${#message}"
72 padding_len
=$
(( (80 - (message_len
)) / 2 ))
74 printf '\n'; printf -- '#%.0s' {1.
.80}; printf '\n'
75 printf -- '-%.0s' {1.
.80}; printf '\n'
76 printf -- '#%.0s' $
(seq 1 $padding_len); printf '%s' "$message"; printf -- '#%.0s' $
(seq 1 $padding_len); printf '\n'
77 printf -- '-%.0s' {1.
.80}; printf '\n'
78 printf -- '#%.0s' {1.
.80}; printf '\n\n'
83 git_clone_modules_sources
() {
84 mkdir
-p "$MODULES_GIT_DIR"
86 # If the version starts with "refs/", checkout the specific git ref, otherwise treat it
88 if [ "${mversion:0:5}" = "refs/" ]; then
89 git clone
--no-tags --depth=1 "${mgitrepo}" "$MODULES_GIT_DIR"
90 (cd "$MODULES_GIT_DIR" && git fetch origin
"${mversion}" && git checkout FETCH_HEAD
)
92 git clone
--no-tags --depth=1 -b "${mversion}" "${mgitrepo}" "$MODULES_GIT_DIR"
96 # Checkout a shallow kernel tree of the specified tag
97 git_clone_linux_sources
() {
98 mkdir
-p "$LINUX_GIT_DIR"
99 git clone
--depth=1 -b "${ktag}" --reference "$LINUX_GIT_REF_REPO_DIR" "${kgitrepo}" "$LINUX_GIT_DIR"
103 # Export the kernel sources from the git repo
104 git_export_linux_sources
() {
106 git archive
"${ktag}" |
tar -x -C "$LINUX_SRCOBJ_DIR"
110 # Upload the tar archive to the object store
111 upload_archive_obj
() {
112 s3cmd
-c "$WORKSPACE/.s3cfg" put
"$WORKSPACE/$obj_name" "$obj_url_prefix/"
113 rm -f "$WORKSPACE/$obj_name"
117 extract_archive_obj
() {
118 tar -xf "$WORKSPACE/$obj_name" -C "$LINUX_OBJ_DIR" -I pbzip2
119 rm -f "$WORKSPACE/$obj_name"
125 tar -cf "$WORKSPACE/$obj_name" -I pbzip2 .
129 # List all GCC versions present in the PATH
133 IFS
=: read -r -a path_array
<<< "$PATH"
134 while read -r gcc
; do
136 done < <(find "${path_array[@]}" -maxdepth 1 -regex '.*/gcc-[0-9\.]+$' -printf '%f\n' |
sort -t- -k2 -V -r)
140 # Find the most recent GCC version supported by the kernel sources
143 # Enter linux source dir
144 cd "$LINUX_SRCOBJ_DIR"
146 kversion
=$
(make -s kernelversion
)
148 if { verlt
"$kversion" "4.4"; }; then
149 # Force gcc-4.8 for kernels before 4.4
150 selected_cc
='gcc-4.8'
151 selected_cc_version
=$
(echo "${selected_cc}" | cut
-d'-' -f2)
153 for cc
in $
(list_gccs
) ; do
154 if "${CROSS_COMPILE:-}${cc}" -I include
/ -D__LINUX_COMPILER_H -D__LINUX_COMPILER_TYPES_H -E include
/linux
/compiler-gcc.h
; then
155 cc_version
=$
(echo "${cc}" | cut
-d'-' -f2)
156 if { verlt
"${kversion}" "5.17"; } && { vergt "${cc_version}" "11"; } ; then
157 # Using gcc-12+ with '-Wuse-after-free' breaks the build of older
158 # kernels (in particular, objtool). Some releases on LTS
159 # branches between 4.x and 5.15 can be built with gcc-12.
160 # @see https://lore.kernel.org/lkml/20494.1643237814@turing-police/
161 # @see https://gitlab.com/linux-kernel/stable/-/commit/52a9dab6d892763b2a8334a568bd4e2c1a6fde66
165 selected_cc_version="$cc_version"
171 if [ -z "$selected_cc" ]; then
172 echo "Found no suitable compiler.
"
176 # lttng-modules requires gcc >= 5.1 for aarch64
177 # @see https://github.com/lttng/lttng-modules/commit/be06402dbdbea2f3394e60ec15c5d3356e2be416
178 if { verlt "${selected_cc_version}" "5.1"; } && [ "${cross_arch}" = "arm64
" ] ; then
179 echo "Building lttng-modules on aarch64 requires gcc
>= 5.1"
186 export_kbuild_flags() {
197 if [ "$selected_cc" != "gcc-4.8
" ]; then
198 # Older kernel Makefiles do not expect the compiler to default to PIE
205 _KCPPFLAGS+=(-fno-pie)
208 if { vergte "${selected_cc_version}" "10"; } && { verlt "${kversion}" "5.10"; } ; then
209 # gcc-10 changed the default from '-fcommon' to '-fno-common', which
210 # causes a linker failure. '-fcommon' can be set on the HOSTCFLAGS
211 # to avoid the issue.
212 # @see https://gitlab.com/linux-kernel/stable/-/commit/e33a814e772cdc36436c8c188d8c42d019fda639
213 _HOSTCFLAGS
+=(-fcommon)
216 if { verlt
"${kversion}" "5.14"; } && [ "${cross_arch:-}" == "armhf" ] ; then
217 # Work-around for producing instructions that aren't valid for the
218 # default architectures.
219 # Eg. Error: selected processor does not support `cpsid i' in ARM mode
220 _KCFLAGS
+=(-march=armv7-a
-mfpu=vfpv3-d16
)
221 _KCPPFLAGS
+=(-march=armv7-a
-mfpu=vfpv3-d16
)
224 if { vergt
"${selected_cc_version}" "8"; } && { vergte "${kversion}" "4.15"; } && { verlt "${kversion}" "4.17"; } ; then
225 # This was added to -Wall in gcc 9 but some kernels do not include the fixes
226 # @see https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88583
227 _KCFLAGS+=(-Wno-error=packed-not-aligned)
230 export KAFLAGS="${_KAFLAGS[*]}"
231 export KCFLAGS="${_KCFLAGS[*]}"
232 export KCPPFLAGS="${_KCPPFLAGS[*]}"
233 export HOSTCFLAGS="${_HOSTCFLAGS[*]}"
234 export CC="${CROSS_COMPILE:-}${selected_cc}"
235 export HOSTCC="${selected_cc}"
240 HOSTCFLAGS="${HOSTCFLAGS:-}"
243 if [ -n "${DEBUG}" ] ; then
250 patch_linux_kernel() {
254 # Show the title of the patch in the build log
255 git -C "${LINUX_GIT_REF_REPO_DIR}" show --oneline -s "${commit_hash}"
257 # Apply patch, don't fail if it doesn't apply cleanly
259 git -C "${LINUX_GIT_REF_REPO_DIR}" format-patch -n1 --stdout "${commit_hash}" | patch -p1
262 if [ "$?
" -gt 1 ] ; then
263 echo "Serious issue patching
"
268 build_linux_kernel() {
269 cd "$LINUX_SRCOBJ_DIR"
271 kversion=$(make -s kernelversion "${make_args[@]}")
272 pahole_version="$
(pahole
--version |
tr -d 'v')"
274 if { verlt "${kversion}" "3.3"; } && [ "${vanilla_config}" = "imx_v6_v7_defconfig
" ] ; then
275 # imx_v6_v7 didn't exist before 06965c39b4c63933fa0a1cde2237ef85477c5655
276 if { verlt "${kversion}" "3.2"; } ; then
277 vanilla_config='mx5_defconfig'
279 vanilla_config='mx51_defconfig'
283 if { verlt "${kversion}" "3.13"; } && [ "${vanilla_config}" = "pseries_le_defconfig
" ] ; then
284 # pseries_le_deconfig was introduced in f53e462e907cbaed29c49c0f10f5b8f614e1bf1d
285 vanilla_config='pseries_defconfig'
288 # Generate kernel configuration
291 if [ "${cross_arch}" = "powerpc
" ]; then
292 if vergte "${kversion}" "4.10"; then
293 echo "Ubuntu removed big endian powerpc configuration from kernel
>= 4.10. Don
't try to build it."
298 fakeroot debian/rules clean KW_DEFCONFIG_DIR=.
300 # Hack for kernel Ubuntu-hwe-5.8
301 # The debian/control file is produced by the clean target above, so this
302 # check needs to happen afterwards.
303 if [ ! -f "debian/compat" ] && ! grep -q debhelper-compat debian/control; then
304 echo "10" > "debian/compat"
307 # genconfigs check can fail in certain cases, eg. when a more recent
308 # compiler exposes kernel configuration flags which aren't
set in the
309 # Ubuntu annotations.
310 # In any case, the configuration will be updated with any missing values
311 # later in our build script.
312 fakeroot debian
/rules genconfigs KW_DEFCONFIG_DIR
=. do_skip_checks
=true
313 cp CONFIGS
/"${ubuntu_config}" .config
317 # Force 32bit build on i386, default is 64bit
318 if [ "$arch" = "i386" ]; then
322 make "${vanilla_config}" "${make_args[@]}"
326 if [ "${vanilla_config}" = "pseries_defconfig" ] && [ "${cross_arch}" = "ppc64el" ] ; then
327 # @see diff <(git show v3.13:arch/powerpc/configs/pseries_defconfig) <(git show v3.13:arch/powerpc/configs/pseries_le_defconfig)
328 scripts
/config
--enable CONFIG_CPU_LITTLE_ENDIAN
329 scripts
/config
--enable CONFIG_CMA
330 scripts
/config
--disable CONFIG_XMON_DEFAULT
331 # scripts/config --disable CONFIG_VIRTUALIZATION
332 # scripts/config --disable CONFIG_KVM_BOOK3S_64
333 scripts
/config
--disable CONFIG_KVM_BOOK3S_64_HV
336 # oldnoconfig was renamed in 4.19
337 if vergte
"$kversion" "4.19"; then
338 update_conf_target
="olddefconfig"
340 update_conf_target
="oldnoconfig"
343 # Fix 'defined(@array)' was removed from recent perl
344 if [ -f "kernel/timeconst.pl" ]; then
345 sed -i 's/defined(\@\(.*\))/@\1/' kernel
/timeconst.pl
348 # Fix syntax of inline assembly which is confused with C++11 raw strings on gcc >= 5
349 if [ "$HOSTCC" != "gcc-4.8" ]; then
350 if [ -f "arch/x86/kvm/svm.c" ]; then
351 sed -i 's/ R"/ R "/g; s/"R"/" R "/g' arch
/x86
/kvm
/svm.c
354 if [ -f "arch/x86/kvm/vmx.c" ]; then
355 sed -i 's/ R"/ R "/g; s/"R"/" R "/g' arch
/x86
/kvm
/vmx.c
359 if { verlt
"${kversion}" "5.11"; } && { vergte "${kversion}" "4.10"; } ; then
360 # Binutils > 2.35 strips empty symbol tables, causing obltool to fail
361 # in certain cases when files are empty.
362 # @see https://gitlab.com/linux-kernel/stable/-/commit/1d489151e9f9d1647110277ff77282fe4d96d09b
364 # There doesn't seem to be any LD/AS/AR flags to control this behaviour,
365 # therefore patching tools/objtool/elf.c is attempted.
366 patch_linux_kernel 1d489151e9f9d1647110277ff77282fe4d96d09b
367 if { verlt "${kversion}" "4.18"; } ; then
368 patch_linux_kernel e81e0724432542af8d8c702c31e9d82f57b1ff31
372 if { vergt "${selected_cc_version}" "7"; } && { vergte "${kversion}" "4.14"; } && { verlt "${kversion}" "4.17"; } ; then
373 # Builds fail due to -Werror=restrict in pager.o and str_error_r.o
374 if { verlt
"${kversion}" "4.16"; } ; then
375 # This is patched since objtool's Makefile doesn't respect HOSTCFLAGS
376 # @see https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ad343a98e74e85aa91d844310e797f96fee6983b
377 patch_linux_kernel ad343a98e74e85aa91d844310e797f96fee6983b
379 if { verlt
"${kversion}" "4.17"; } ; then
380 # This is patched since objtool's Makefile doesn't respect HOSTCFLAGS
381 # @see https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=854e55ad289ef8888e7991f0ada85d5846f5afb9
382 patch_linux_kernel
854e55ad289ef8888e7991f0ada85d5846f5afb9
387 if { vergt
"${selected_cc_version}" "9"; } && { verlt "${kversion}" "5.6"; } ; then
388 # Duplicate decalarations of __force_order
389 # @see https://gitlab.com/linux-kernel/stable/-/commit/df6d4f9db79c1a5d6f48b59db35ccd1e9ff9adfc
390 # However, kaslr_64.c doesn't exit in 4.15, 4.16, it's named pagetable.c
391 if [ -f arch/x86/boot/compressed/pagetable.c ] ; then
392 sed -i '/^unsigned long __force_order;$/d' arch/x86/boot/compressed/pagetable.c
394 if [ -f arch/x86/boot/compressed/kaslr_64.c ] ; then
395 patch_linux_kernel df6d4f9db79c1a5d6f48b59db35ccd1e9ff9adfc
399 if { vergte "${kversion}" "4.18"; } && { verlt "${kversion}" "4.19"; } ; then
400 # In some cases, compiling net/bpfilter can fail with the following error:
401 # net/bpfilter/main.c:9:10: fatal error: include/uapi/linux/bpf.h: No such file or directory
402 # make[2]: *** [scripts/Makefile.host:107: net/bpfilter/main.o] Error 1
404 # While the issue is potentially in a number of old versions, it has only
405 # been observed in v4.18-rt
407 patch_linux_kernel
303a339f30a9441c4695d3d2cc78f1b33cd959ff
410 if { vergte
"${kversion}" "4.18"; } && { verlt "${kversion}" "4.19"; } ; then
411 # In some cases, compiling net/bpfilter can fail with the following error:
412 # net/bpfilter/main.c:9:10: fatal error: include/uapi/linux/bpf.h: No such file or directory
413 # make[2]: *** [scripts/Makefile.host:107: net/bpfilter/main.o] Error 1
415 # While the issue is potentially in a number of old versions, it has only
416 # been observed in v4.18-rt
418 patch_linux_kernel 303a339f30a9441c4695d3d2cc78f1b33cd959ff
421 if { vergte "${kversion}" "4.15"; } && { verlt "${kversion}" "4.18"; } ; then
422 # Some old kernels fail to build when make is too new
423 # @see https://gitlab.com/linux-kernel/stable/-/commit/9feeb638cde083c737e295c0547f1b4f28e99583
424 patch_linux_kernel
9564a8cf422d7b58f6e857e3546d346fa970191e
427 if { vergte
"${kversion}" "4.14"; } && { verlt "${kversion}" "4.14.55"; } ; then
428 # Some old kernels fail to build when make is too new
429 # @see https://gitlab.com/linux-kernel/stable/-/commit/9feeb638cde083c737e295c0547f1b4f28e99583
430 patch_linux_kernel e82885490a611f2b75a6c27cd7bb09665c1740be
433 if ( { vergte "${kversion}" "4.15"; } && { verlt "${kversion}" "4.18"; } ) || \
434 ( { vergte
"${kversion}" "4.14"; } && { verlt "${kversion}" "4.14.56"; } ) ; then
435 # Some old kernels fail to build when make is too new
436 # @see https://gitlab.com/linux-kernel/stable/-/commit/9feeb638cde083c737e295c0547f1b4f28e99583
437 patch_linux_kernel 9feeb638cde083c737e295c0547f1b4f28e99583
440 if ( { vergte "${kversion}" "4.12"; } && { verlt "${kversion}" "4.20.17"; } ) || \
441 ( { vergte
"${kversion}" "5.0"; } && { verlt "${kversion}" "5.0.12"; } ) ; then
442 # Old kernels can fail to build while on newer host kernels with errors
444 # In file included from scripts/selinux/genheaders/genheaders.c:19:
445 # ./security/selinux/include/classmap.h:249:2: error: #error New address family defined, please update secclass_map.
446 # @see https://gitlab.com/linux-kernel/stable/-/commit/dfbd199a7cfe3e3cd8531e1353cdbd7175bfbc5e
448 patch_linux_kernel dfbd199a7cfe3e3cd8531e1353cdbd7175bfbc5e
451 # Compatibility with binutils >= ~ 2.31
452 if { vergte "${kversion}" "3.19"; } && { verlt "${kversion}" "4.16"; } ; then
453 patch_linux_kernel b21ebf2fb4cde1618915a97cc773e287ff49173e
455 if { vergte
"${kversion}" "3.17"; } && { verlt "${kversion}" "3.18.69"; } ; then
456 patch_linux_kernel edb9d2d5e647e7a8521b0d35f8452deb02dfd138
458 if { vergte "${kversion}" "3.17"; } && { verlt "${kversion}" "3.18.100"; } ; then
459 patch_linux_kernel
3be6583f0b6f1bf1ee650ebf473d9dee36836527
460 patch_linux_kernel
12d839211d080f6a9c370398c41a260365d34c62
462 if { vergte
"${kversion}" "3.16"; } && { verlt "${kversion}" "3.16.82"; } ; then
463 patch_linux_kernel ad10e6d464796f2a481de4039a43b9cfca034e1c
466 if ( { vergte "${kversion}" "3.14"; } && { verlt "${kversion}" "4.4"; } ) ||
467 ( { vergte
"${kversion}" "4.8"; } && { verlt "${kversion}" "4.18"; } ); then
468 # While the original motivation of this patch is for fixing builds using
469 # clang, the same error occurs between linux >= 3.14 and < 4.4, and in
471 # For rt-linux, the error has been observed in 4.8, 4.11, and 4.13.
473 # This patch only partially applies due to changes in kernel/Makefile,
474 # so a supplementary patch is needed
476 # Without this patch, builds fail with
477 # Cannot find symbol for section 2: .text.
478 # kernel/elfcore.o: failed
480 # @see https://github.com/linuxppc/issues/issues/388
481 # @see https://lore.kernel.org/lkml/20201204165742.3815221-2-arnd@kernel.org/
483 patch_linux_kernel 6e7b64b9dd6d96537d816ea07ec26b7dedd397b9
484 if grep -q elfcore.o kernel/Makefile ; then
485 sed -i '/^.* += elfcore.o$/d' kernel/Makefile
488 # Same as above for the v4.4 branch
489 if ( { vergte "${kversion}" "4.4"; } && { verlt "${kversion}" "4.4.257"; } ); then
490 patch_linux_kernel
3140b0740b31cc63cf2ee08bc3f746b423eb068d
491 if grep -q elfcore.o kernel
/Makefile
; then
492 sed -i '/^.* += elfcore.o$/d' kernel
/Makefile
496 if { vergte
"${kversion}" "4.5"; } && { verlt "${kversion}" "4.8"; } ; then
497 # Kernels between v4.5 and v4.8 built with gcc >= 8 on arm will hit an
500 # kernel/.tmp_fork.s: Assembler messages:
501 # kernel/.tmp_fork.s:1790: Error: .err encountered
503 # @see https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85745
505 patch_linux_kernel 9f73bd8bb445e0cbe4bcef6d4cfc788f1e184007
508 if ( { vergte "${kversion}" "4.4"; } && { verlt "${kversion}" "4.4.136"; } ) ||
509 ( { vergte
"${kversion}" "4.5"; } && { verlt "${kversion}" "4.8"; } ); then
510 # Hacky patch to deal with the following build error:
511 # Cannot find symbol for section 7: .text.unlikely.
512 # kernel/kexec_file.o: failed
513 # make[1]: *** [scripts/Makefile.build:291: kernel/kexec_file.o] Error 1
515 # This error happens with binutils 2.36 and 2.37, but should probably not
516 # be an issue with binutils 2.38.
517 # @see https://github.com/linuxppc/issues/issues/388
518 # @see https://github.com/bminor/binutils-gdb/commit/c09c8b42021180eee9495bd50d8b35e683d3901b
520 # There is some sort of config (unspecified in past discussions) which
521 # provokes the error, and there was never a potential fix merged in
522 # this discussion, in part because the build systems of the kernel
523 # switched to objtool instead.
525 # @see https://lore.kernel.org/all/20210215162209.5e2a475b@gandalf.local.home/
527 sed -i 's/return txtname;/return shdr0->sh_size ? txtname : NULL;/' scripts/recordmcount.h
529 # After applying the above patch, the build continues but fails with
530 # head64.c:(.text.exit+0x5): undefined reference to `__gcov_exit'
532 scripts/config --disable CONFIG_GCOV_KERNEL
535 if { vergte "${kversion}" "4.5"; } && { verlt "${kversion}" "4.5.5"; } ; then
536 # drivers/staging/wilc1000/wilc_spi.c:123:34: error: storage size of ‘wilc1000_spi_ops’ isn’t known
537 patch_linux_kernel ce7b516f3f9e11fe4ee06fad0d7e853bb6e8f160
540 # Newer binutils don't accept 3 operand 'cmp' instructions on ppc64
541 # Convert them to 'cmpw' which was previously done silently
542 if verlt
"$kversion" "4.9"; then
543 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/"
544 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/"
545 sed -i "s/\$pie \-o \"\$ofile\"/\$pie --no-dynamic-linker -o \"\$ofile\"/" arch
/powerpc
/boot
/wrapper
548 if [ "$(scripts/config --state CONFIG_EXTCON_ADC_JACK)" != "n" ] &&
549 ( { vergte
"${kversion}" "4.2"; } && { verlt "${kversion}" "4.12"; } ); then
550 # 73b6ecdb93e8e77752cae9077c424fcdc6f23c39 introduced a change where
551 # extcon-adc-jack.h has an incompatible pointer type.
552 # In GCC >= 5 this will provoke a warning and build failure.
554 # drivers/extcon/extcon-adc-jack.c: In function ‘adc_jack_probe’:
555 # drivers/extcon/extcon-adc-jack.c:111:64: error: passing argument 2 of ‘devm_extcon_dev_allocate’ from incompatible pointer type [-Werror=incompatible-pointer-types]
556 # make[2]: *** [scripts/Makefile.build:295: drivers/extcon/extcon-adc-jack.o] Error 1
558 # 8a522bf2d4f788306443d36b26b54f0aedcdfdbe (in 4.11) has a fix for this warning
560 patch_linux_kernel 8a522bf2d4f788306443d36b26b54f0aedcdfdbe
563 if ( { vergte "${kversion}" "4.15"; } && { verlt "${kversion}" "4.15.2"; } ) || \
564 ( { vergte
"${kversion}" "4.14"; } && { verlt "${kversion}" "4.14.18"; } ) ; then
565 # Fix an objtool Segmentation fault
566 patch_linux_kernel dd12561854824fd1f05baf2a1b794faa046e2425
569 if { vergte "${kversion}" "4.14"; } && { verlt "${kversion}" "4.14.268"; } ; then
570 # Builds fail due to -Werror=use-after-free in sigchain.o and help.o
571 patch_linux_kernel e89bb266b710ce056f141f29f091fd468a4a8185
574 # Fix a typo in v2.6.36.x
575 if [ -f "arch/x86/kernel/entry_64.S" ]; then
576 sed -i 's/END(do_hypervisor_callback)/END(xen_do_hypervisor_callback)/' arch
/x86
/kernel
/entry_64.S
579 # Fix compiler switch in vdso Makefile for 2.6.36 to 2.6.36.2
580 if { vergte
"$kversion" "2.6.36" && verlte
"$kversion" "2.6.36.3"; }; then
581 sed -i 's/-m elf_x86_64/-m64/' arch
/x86
/vdso
/Makefile
582 sed -i 's/-m elf_i386/-m32/' arch
/x86
/vdso
/Makefile
585 # Fix kernel < 3.0 with gcc >= 4.7
586 if verlt
"$kversion" "3.0"; then
587 sed -i '/linux\/compiler.h/a #include <linux\/linkage.h> \/* For asmregparm *\/' arch
/x86
/include
/asm
/ptrace.h
588 sed -i 's/extern long syscall_trace_enter/extern asmregparm long syscall_trace_enter/' arch
/x86
/include
/asm
/ptrace.h
589 sed -i 's/extern void syscall_trace_leave/extern asmregparm void syscall_trace_leave/' arch
/x86
/include
/asm
/ptrace.h
590 echo "header-y += linkage.h" >> include
/linux
/Kbuild
593 if [ "${cross_arch}" = "powerpc" ] ; then
594 if { vergte
"${kversion}" "4.15"; } && { verlt "${kversion}" "4.16"; } ; then
595 # Avoid register errors such as
596 # aes_generic.c:(.text+0x4e0): undefined reference to `_restgpr_31_x'
597 # @see https://gitlab.com/linux-kernel/stable/-/commit/148b974deea927f5dbb6c468af2707b488bfa2de
599 CFLAGS_aes_generic.o=''
604 if [ "$
(scripts
/config
--state CONFIG_DEBUG_INFO_BTF
)" == "y
" ] &&
605 { vergte "${pahole_version}" "1.24"; } &&
606 { vergte "${kversion}" "5.10"; } && { verlt "${kversion}" "6.0"; } ;then
607 # Some kernels Eg. Ubuntu-hwe-5.13-5.13.0-52.59_20.04.1
608 # fail with the following error:
610 # FAILED: load BTF from vmlinux: Invalid argument
612 # When CONFIG_DEBUG_INFO_BTF is set, certain versions of pahole require
613 # `--skip_encoding_btf_enum64` to be passed as the kernel doesn't define
616 # Introduced in 341dfcf8d78eaa3a2dc96dea06f0392eb2978364 (~v5.10)
617 # @see https://lore.kernel.org/bpf/20220825171620.cioobudss6ovyrkc@altlinux.org/t/
619 if [ -f "scripts/pahole-flags.sh" ] ; then
620 # shellcheck disable=SC2016
621 sed -i 's/ -J ${PAHOLE_FLAGS} / -J ${PAHOLE_FLAGS} --skip_encoding_btf_enum64 /' scripts
/link-vmlinux.sh
623 # shellcheck disable=SC2016
624 sed -i 's/ -J ${extra_paholeopt} / -J ${extra_paholeopt} --skip_encoding_btf_enum64 /' scripts
/link-vmlinux.sh
629 if [ "$HOSTCC" == "gcc-4.8" ]; then
630 scripts
/config
--disable CONFIG_CC_STACKPROTECTOR_STRONG
631 scripts
/config
--disable CONFIG_PPC_OF_BOOT_TRAMPOLINE
634 # Don't try to sign modules
635 scripts
/config
--disable CONFIG_MODULE_SIG
637 # Disable kernel stack frame correctness validation, introduced in 4.6.0 and currently fails
638 scripts
/config
--disable CONFIG_STACK_VALIDATION
640 # Cause problems with inline assembly on i386
641 scripts
/config
--disable CONFIG_DEBUG_SECTION_MISMATCH
643 # Don't build samples, they are broken on some kernel releases
644 scripts
/config
--disable CONFIG_SAMPLES
645 scripts
/config
--disable CONFIG_BUILD_DOCSRC
648 scripts
/config
--disable CONFIG_KCOV
650 # Broken on some RT kernels
651 scripts
/config
--disable CONFIG_HYPERV
654 scripts
/config
--disable CONFIG_RAPIDIO_TSI721
655 scripts
/config
--disable CONFIG_SGI_XP
656 scripts
/config
--disable CONFIG_MFD_WM8994
657 scripts
/config
--disable CONFIG_DRM_RADEON
658 scripts
/config
--disable CONFIG_SND_SOC_WM5100
659 # More recent compiler optimizations (from gcc 8 onwards )expose build errors
660 # with netronome on older kernels.
661 # Observed in 4.11-rt, 4.15-4.17, 5.0-rt - 5.16-rt
662 # It seems easier to disable the driver than to attempt patching.
664 # In function ‘ur_load_imm_any’,
665 # inlined from ‘jeq_imm’ at drivers/net/ethernet/netronome/nfp/bpf/jit.c:3146:13:
666 # ./include/linux/compiler.h:350:45: error: call to ‘__compiletime_assert_1062’ declared with attribute error: FIELD_FIT: value too large for the field
667 # 350 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
669 scripts
/config
--disable CONFIG_NET_VENDOR_NETRONOME
671 # In function ‘memcpy’,
672 # inlined from ‘kszphy_get_strings’ at drivers/net/phy/micrel.c:664:3:
673 # ./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
674 # 305 | __read_overflow2();
675 # | ^~~~~~~~~~~~~~~~~~
676 # make[3]: *** [scripts/Makefile.build:308: drivers/net/phy/micrel.o] Error 1
678 scripts
/config
--disable CONFIG_MICREL_PHY
681 # IGBVF won't build with recent gcc on 2.6.38.x
682 if { vergte
"$kversion" "2.6.37" && verlt
"$kversion" "2.6.38"; }; then
683 scripts
/config
--disable CONFIG_IGBVF
686 # Don't fail the build on warnings
687 scripts
/config
--disable CONFIG_WERROR
688 scripts
/config
--enable CONFIG_PPC_DISABLE_WERROR
690 # Set required options
691 scripts
/config
--enable CONFIG_TRACEPOINTS
692 scripts
/config
--enable CONFIG_KALLSYMS
693 scripts
/config
--enable CONFIG_HIGH_RES_TIMERS
694 scripts
/config
--enable CONFIG_KPROBES
695 scripts
/config
--enable CONFIG_FTRACE
696 scripts
/config
--enable CONFIG_BLK_DEV_IO_TRACE
697 scripts
/config
--enable CONFIG_KALLSYMS_ALL
698 scripts
/config
--enable CONFIG_HAVE_SYSCALL_TRACEPOINTS
699 scripts
/config
--enable CONFIG_PERF_EVENTS
700 scripts
/config
--enable CONFIG_EVENT_TRACING
701 scripts
/config
--enable CONFIG_KRETPROBES
703 if [ -n "${DEBUG}" ] ; then
707 make "$update_conf_target" "${make_args[@]}"
708 make -j"$NPROC" "${make_args[@]}"
710 krelease
=$
(make -s kernelrelease
"${make_args[@]}")
712 # Save the kernel and modules
713 mkdir
-p "$LINUX_INSTOBJ_DIR/boot"
714 make INSTALL_MOD_PATH
="$LINUX_INSTOBJ_DIR" INSTALL_MOD_STRIP
=1 modules_install
"${make_args[@]}"
715 make INSTALL_MOD_PATH
="$LINUX_INSTOBJ_DIR" INSTALL_PATH
="$LINUX_INSTOBJ_DIR/boot" install "${make_args[@]}"
716 rm -f "$LINUX_INSTOBJ_DIR/lib/modules/${krelease}/source" "$LINUX_INSTOBJ_DIR/lib/modules/${krelease}/build"
717 ln -s ..
/..
/..
/..
/sources
"$LINUX_INSTOBJ_DIR/lib/modules/${krelease}/source"
718 ln -s ..
/..
/..
/..
/sources
"$LINUX_INSTOBJ_DIR/lib/modules/${krelease}/source"
722 extract_distro_headers
() {
724 # Enter linux source dir
725 cd "${LINUX_SRCOBJ_DIR}"
728 # For RT kernels, copy version file
729 if [ -s localversion-rt
]; then
730 cp -a localversion-rt
"${LINUX_HDROBJ_DIR}"
733 # Copy all Makefile related stuff
734 find .
-path './include/*' -prune \
735 -o -path './scripts/*' -prune -o -type f \
736 \
( -name 'Makefile*' -o -name 'Kconfig*' -o -name 'Kbuild*' -o \
737 -name '*.sh' -o -name '*.pl' -o -name '*.lds' \
) \
738 -print |
cpio -pd --preserve-modification-time "${LINUX_HDROBJ_DIR}"
740 # Copy base scripts and include dirs
741 cp -a scripts include
"${LINUX_HDROBJ_DIR}"
744 (find arch
-name include
-type d
-print0 | \
745 xargs -0 -n1 -I '{}' find '{}' -type f
) | \
746 cpio -pd --preserve-modification-time "${LINUX_HDROBJ_DIR}"
749 (find arch
-name scripts
-type d
-print0 | \
750 xargs -0 -n1 -I '{}' find '{}' -type f
) | \
751 cpio -pd --preserve-modification-time "${LINUX_HDROBJ_DIR}"
754 rm -f "${LINUX_HDROBJ_DIR}/scripts/*.o"
755 rm -f "${LINUX_HDROBJ_DIR}/scripts/*/*.o"
757 # On powerpc 32bits this object is required to link modules
758 if [ "${karch}" = "powerpc" ]; then
759 if [ "$(scripts/config -s CONFIG_PPC64)" = "y" ] && vergte
"${kversion}" "5.4"; then
762 cp -a --parents arch
/powerpc
/lib
/crtsavres.
[So
] "${LINUX_HDROBJ_DIR}/"
766 # On arm64 between 4.13 and 1.15 this object is required to build with ftrace support
767 if [ "${karch}" = "arm64" ]; then
768 if [ -f "arch/arm64/kernel/ftrace-mod.S" ]; then
769 cp -a --parents arch
/arm64
/kernel
/ftrace-mod.
[So
] "${LINUX_HDROBJ_DIR}/"
773 # Newer kernels need objtool to build modules when CONFIG_STACK_VALIDATION=y
774 if [ -f tools
/objtool
/objtool
]; then
775 cp -a --parents tools
/objtool
/objtool
"${LINUX_HDROBJ_DIR}/"
778 if [ -f "arch/x86/kernel/macros.s" ]; then
779 cp -a --parents arch
/x86
/kernel
/macros.s
"${LINUX_HDROBJ_DIR}/"
782 # Copy modules related stuff, if available
783 if [ -s Module.symvers
]; then
784 cp Module.symvers
"${LINUX_HDROBJ_DIR}"
787 if [ -s System.map
]; then
788 cp System.map
"${LINUX_HDROBJ_DIR}"
791 if [ -s Module.markers
]; then
792 cp Module.markers
"${LINUX_HDROBJ_DIR}"
796 cp .config
"${LINUX_HDROBJ_DIR}"
798 # Make sure the Makefile and version.h have a matching timestamp so that
799 # external modules can be built
800 if [ -s "${LINUX_HDROBJ_DIR}/include/generated/uapi/linux/version.h" ]; then
801 touch -r "${LINUX_HDROBJ_DIR}/Makefile" "${LINUX_HDROBJ_DIR}/include/generated/uapi/linux/version.h"
802 elif [ -s "${LINUX_HDROBJ_DIR}/include/linux/version.h" ]; then
803 touch -r "${LINUX_HDROBJ_DIR}/Makefile" "${LINUX_HDROBJ_DIR}/include/linux/version.h"
805 echo "Missing version.h"
808 touch -r "${LINUX_HDROBJ_DIR}/.config" "${LINUX_HDROBJ_DIR}/include/generated/autoconf.h"
810 # Copy .config to include/config/auto.conf so "make prepare" is unnecessary.
811 if [ ! -f "${LINUX_HDROBJ_DIR}/include/config/auto.conf" ]; then
812 cp "${LINUX_HDROBJ_DIR}/.config" "${LINUX_HDROBJ_DIR}/include/config/auto.conf"
815 # Finally clean the object files from the full source tree
818 # And regen the modules support files
819 make modules_prepare
"${make_args[@]}"
821 # On powerpc 32bits this object is required to link modules
822 if [ "${karch}" = "powerpc" ]; then
823 if [ "$(scripts/config -s CONFIG_PPC64)" = "y" ] && vergte
"${kversion}" "5.4"; then
826 make arch
/powerpc
/lib
/crtsavres.o
"${make_args[@]}"
830 # On arm64 between 4.13 and 4.15 this object is required to build with ftrace support
831 if [ "${karch}" = "arm64" ]; then
832 if [ -f "arch/arm64/kernel/ftrace-mod.S" ]; then
833 make arch
/arm64
/kernel
/ftrace-mod.o
"${make_args[@]}"
837 # Version specific tasks
840 # Add Ubuntu ABI number to kernel headers, this is normally done by the packaging code
841 ABINUM
="$(echo "$ktag" | grep -P -o 'Ubuntu-(lts-)?.*-\K\d+(?=\..*)')"
842 echo "#define UTS_UBUNTU_RELEASE_ABI $ABINUM" >> include
/generated
/utsrelease.h
843 echo "#define UTS_UBUNTU_RELEASE_ABI $ABINUM" >> "${LINUX_HDROBJ_DIR}/include/generated/utsrelease.h"
855 kversion
=$
(make -C "$LINUX_HDROBJ_DIR" -s kernelversion
)
857 # Try to catch some compatibility problems by turning some
858 # warnings into errors.
859 #export KCFLAGS="$KCFLAGS -Wall -Werror"
861 # Enter lttng-modules source dir
862 cd "${MODULES_GIT_DIR}"
864 # kernels 3.10 to 3.10.13 and 3.11 to 3.11.2 introduce a deadlock in the
865 # timekeeping subsystem. We want those build to fail.
866 if { vergte
"$kversion" "3.10" && verlte
"$kversion" "3.10.13"; } || \
867 { vergte
"$kversion" "3.11" && verlte
"$kversion" "3.11.2"; }; then
872 KERNELDIR
="${kdir}" make -j"${NPROC}" V=1 "${make_args[@]}"
877 # We expect this build to fail, if it doesn't, fail the job.
878 if [ "$ret" -eq 0 ]; then
879 echo "This build should have failed."
883 # We have to publish at least one file or the build will fail
884 echo "This kernel is broken, there is a deadlock in the timekeeping subsystem." > "${outdir}/BROKEN.txt.ko"
886 KERNELDIR
="${kdir}" make clean
890 # Build modules against full kernel sources
891 KERNELDIR
="${kdir}" make -j"${NPROC}" V=1 "${make_args[@]}"
893 # Install modules to build dir
894 KERNELDIR
="${kdir}" make INSTALL_MOD_PATH
="${outdir}" modules_install
897 KERNELDIR
="${kdir}" make clean
907 MODULES_GIT_DIR
="${WORKSPACE}/src/lttng-modules"
908 LINUX_GIT_DIR
="${WORKSPACE}/src/linux"
910 LINUX_OBJ_DIR
="${WORKSPACE}/linux"
911 LINUX_SRCOBJ_DIR
="${LINUX_OBJ_DIR}/sources"
912 LINUX_HDROBJ_DIR
="${LINUX_OBJ_DIR}/headers"
913 LINUX_INSTOBJ_DIR
="${LINUX_OBJ_DIR}/install"
915 MODULES_OUTPUT_KSRC_DIR
="${WORKSPACE}/build/lttng-modules-ksrc"
916 MODULES_OUTPUT_KHDR_DIR
="${WORKSPACE}/build/lttng-modules-khdr"
918 LINUX_GIT_REF_REPO_DIR
="$HOME/gitcache/linux-stable.git/"
920 OBJ_STORE_URL
="s3://jenkins"
924 # Create build directories
925 mkdir
-p "${LINUX_SRCOBJ_DIR}" "${LINUX_HDROBJ_DIR}" "${LINUX_INSTOBJ_DIR}" "${MODULES_OUTPUT_KSRC_DIR}" "${MODULES_OUTPUT_KHDR_DIR}"
927 print_header
"Clone LTTng-modules sources"
928 git_clone_modules_sources
930 # Setup cross compile env if available
931 if [ "x${cross_arch}" != "x" ]; then
933 case "$cross_arch" in
936 cross_compile
="arm-linux-gnueabihf-"
937 vanilla_config
="imx_v6_v7_defconfig"
938 ubuntu_config
="armhf-config.flavour.generic"
943 cross_compile
="aarch64-linux-gnu-"
944 vanilla_config
="defconfig"
945 ubuntu_config
="arm64-config.flavour.generic"
950 cross_compile
="powerpc-linux-gnu-"
951 vanilla_config
="ppc44x_defconfig"
952 ubuntu_config
="powerpc-config.flavour.powerpc-smp"
957 cross_compile
="powerpc64le-linux-gnu-"
958 vanilla_config
="pseries_le_defconfig"
959 ubuntu_config
="ppc64el-config.flavour.generic"
963 echo "Unsupported cross arch $cross_arch"
968 # Export variables used by Kbuild for cross compilation
969 export ARCH
="${karch}"
970 export CROSS_COMPILE
="${cross_compile}"
972 # Set arch specific values if we are not cross compiling
973 elif [ "x${arch}" != "x" ]; then
978 vanilla_config
="allmodconfig"
979 ubuntu_config
="i386-config.flavour.generic"
984 vanilla_config
="allmodconfig"
985 ubuntu_config
="amd64-config.flavour.generic"
990 vanilla_config
="allmodconfig"
991 ubuntu_config
="armhf-config.flavour.generic"
996 vanilla_config
="allmodconfig"
997 ubuntu_config
="arm64-config.flavour.generic"
1002 vanilla_config
="allmodconfig"
1003 ubuntu_config
="powerpc-config.flavour.powerpc-smp"
1008 vanilla_config
="allmodconfig"
1009 ubuntu_config
="ppc64el-config.flavour.generic"
1013 echo "Unsupported arch $arch"
1018 echo "No arch or cross_arch specified"
1024 # First get the kernel build from the object store, or build it, if it's
1028 echo "# Setup endpoint
1029 host_base = obj.internal.efficios.com
1030 host_bucket = obj.internal.efficios.com
1031 bucket_location = us-east-1
1035 access_key = jenkins
1036 secret_key = echo123456
1038 # Enable S3 v4 signature APIs
1039 signature_v2 = False" > "$WORKSPACE/.s3cfg"
1042 url_hash
="$(echo -n "$kgitrepo" | md5sum | awk '{ print $1 }')"
1043 obj_name
="linux.tar.bz2"
1045 if [ -z "${cross_arch}" ]; then
1046 obj_url_prefix
="$OBJ_STORE_URL/linux-build/$url_hash/$ktag/platform-${platform}/$arch/native"
1048 obj_url_prefix
="$OBJ_STORE_URL/linux-build/$url_hash/$ktag/platform-${platform}/${cross_arch}"
1051 obj_url
="$obj_url_prefix/$obj_name"
1054 # In s3cmd 2.3, the return code of get when an object does not exist (64)
1055 # is different than in 2.2 (12). The return codes of 's3cmd info' are
1056 # consistent between 2.2 and 2.3.
1057 s3cmd
-c "$WORKSPACE/.s3cfg" info
"$obj_url"
1063 print_header
"Get sources and prebuilt kernel"
1064 s3cmd
-c "$WORKSPACE/.s3cfg" get
"$obj_url"
1067 print_header
"Select compiler and set build flags"
1073 print_header
"Clone kernel sources"
1075 # Build all the things and upload
1076 # then finish the module build...
1078 git_clone_linux_sources
1079 git_export_linux_sources
1081 print_header
"Select compiler and set build flags"
1085 ## PREPARE FULL LINUX SOURCE TREE
1086 print_header
"Build kernel from source"
1089 ## EXTRACT DISTRO STYLE KERNEL HEADERS / DEVEL
1090 extract_distro_headers
1092 print_header
"Upload kernel to object storage"
1099 echo "Unknown error? Abort"
1106 # Either we downloaded a pre-build kernel or we built it and uploaded
1107 # the archive for future builds.
1111 print_header
"Build modules against full kernel sources"
1112 build_modules
"${LINUX_SRCOBJ_DIR}" "${MODULES_OUTPUT_KSRC_DIR}"
1114 print_header
"Build modules against kernel headers"
1115 build_modules
"${LINUX_HDROBJ_DIR}" "${MODULES_OUTPUT_KHDR_DIR}"
1118 print_header
"Check for built modules in install directory"
1120 # Make sure some modules were actually built
1121 tree
"${MODULES_OUTPUT_KSRC_DIR}"
1122 if [ "x$(find "${MODULES_OUTPUT_KSRC_DIR}" -name '*.ko*' -printf yes -quit)" != "xyes" ]; then
1123 echo "No modules built!"
1127 tree
"${MODULES_OUTPUT_KHDR_DIR}"
1128 if [ "x$(find "${MODULES_OUTPUT_KHDR_DIR}" -name '*.ko*' -printf yes -quit)" != "xyes" ]; then
1129 echo "No modules built!"