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 # Get the kernel version using the host toolchain, some cross-compiled arch may be broken
147 kversion
=$
(unset ARCH
; unset CROSS_COMPILE
; make -s kernelversion
)
149 if [ "${cross_arch}" = "riscv64" ] && verlt
"${kversion}" "5.12"; then
150 echo "RISC-V support was upstreamed in kernel v4.19 but kprobes support was only added in v5.12. Don't try to build it."
154 if { verlt
"$kversion" "4.4"; }; then
155 # Force gcc-4.8 for kernels before 4.4
156 selected_cc
='gcc-4.8'
157 selected_cc_version
=$
(echo "${selected_cc}" | cut
-d'-' -f2)
159 for cc
in $
(list_gccs
) ; do
160 if "${CROSS_COMPILE:-}${cc}" -I include
/ -D__LINUX_COMPILER_H -D__LINUX_COMPILER_TYPES_H -E include
/linux
/compiler-gcc.h
; then
161 cc_version
=$
(echo "${cc}" | cut
-d'-' -f2)
162 if { verlt
"${kversion}" "5.17"; } && { vergt "${cc_version}" "11"; } ; then
163 # Using gcc-12+ with '-Wuse-after-free' breaks the build of older
164 # kernels (in particular, objtool). Some releases on LTS
165 # branches between 4.x and 5.15 can be built with gcc-12.
166 # @see https://lore.kernel.org/lkml/20494.1643237814@turing-police/
167 # @see https://gitlab.com/linux-kernel/stable/-/commit/52a9dab6d892763b2a8334a568bd4e2c1a6fde66
171 selected_cc_version="$cc_version"
177 if [ -z "$selected_cc" ]; then
178 echo "Found no suitable compiler.
"
182 # lttng-modules requires gcc >= 5.1 for aarch64
183 # @see https://github.com/lttng/lttng-modules/commit/be06402dbdbea2f3394e60ec15c5d3356e2be416
184 if { verlt "${selected_cc_version}" "5.1"; } && [ "${cross_arch}" = "arm64
" ] ; then
185 echo "Building lttng-modules on aarch64 requires gcc
>= 5.1"
192 export_kbuild_flags() {
203 if [ "$selected_cc" != "gcc-4.8
" ]; then
204 # Older kernel Makefiles do not expect the compiler to default to PIE
211 _KCPPFLAGS+=(-fno-pie)
214 if { vergte "${selected_cc_version}" "10"; } && { verlt "${kversion}" "5.10"; } ; then
215 # gcc-10 changed the default from '-fcommon' to '-fno-common', which
216 # causes a linker failure. '-fcommon' can be set on the HOSTCFLAGS
217 # to avoid the issue.
218 # @see https://gitlab.com/linux-kernel/stable/-/commit/e33a814e772cdc36436c8c188d8c42d019fda639
219 _HOSTCFLAGS
+=(-fcommon)
222 if { verlt
"${kversion}" "5.14"; } && [ "${cross_arch:-}" == "armhf" ] ; then
223 # Work-around for producing instructions that aren't valid for the
224 # default architectures.
225 # Eg. Error: selected processor does not support `cpsid i' in ARM mode
226 _KCFLAGS
+=(-march=armv7-a
-mfpu=vfpv3-d16
)
227 _KCPPFLAGS
+=(-march=armv7-a
-mfpu=vfpv3-d16
)
230 if { vergt
"${selected_cc_version}" "8"; } && { vergte "${kversion}" "4.15"; } && { verlt "${kversion}" "4.17"; } ; then
231 # This was added to -Wall in gcc 9 but some kernels do not include the fixes
232 # @see https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88583
233 _KCFLAGS+=(-Wno-error=packed-not-aligned)
236 export KAFLAGS="${_KAFLAGS[*]}"
237 export KCFLAGS="${_KCFLAGS[*]}"
238 export KCPPFLAGS="${_KCPPFLAGS[*]}"
239 export HOSTCFLAGS="${_HOSTCFLAGS[*]}"
240 export CC="${CROSS_COMPILE:-}${selected_cc}"
241 export HOSTCC="${selected_cc}"
246 HOSTCFLAGS="${HOSTCFLAGS:-}"
249 if [ -n "${DEBUG}" ] ; then
256 patch_linux_kernel() {
260 # Show the title of the patch in the build log
261 git -C "${LINUX_GIT_REF_REPO_DIR}" show --oneline -s "${commit_hash}"
263 # Apply patch, don't fail if it doesn't apply cleanly
265 git -C "${LINUX_GIT_REF_REPO_DIR}" format-patch -n1 --stdout "${commit_hash}" | patch -p1
268 if [ "$?
" -gt 1 ] ; then
269 echo "Serious issue patching
"
274 build_linux_kernel() {
275 cd "$LINUX_SRCOBJ_DIR"
277 kversion=$(make -s kernelversion "${make_args[@]}")
278 pahole_version="$
(pahole
--version |
tr -d 'v')"
280 if { verlt "${kversion}" "3.3"; } && [ "${vanilla_config}" = "imx_v6_v7_defconfig
" ] ; then
281 # imx_v6_v7 didn't exist before 06965c39b4c63933fa0a1cde2237ef85477c5655
282 if { verlt "${kversion}" "3.2"; } ; then
283 vanilla_config='mx5_defconfig'
285 vanilla_config='mx51_defconfig'
289 if { verlt "${kversion}" "3.13"; } && [ "${vanilla_config}" = "pseries_le_defconfig
" ] ; then
290 # pseries_le_deconfig was introduced in f53e462e907cbaed29c49c0f10f5b8f614e1bf1d
291 vanilla_config='pseries_defconfig'
294 # Generate kernel configuration
297 if [ "${cross_arch}" = "powerpc
" ] && vergte "${kversion}" "4.10"; then
298 echo "Ubuntu removed big endian powerpc configuration from kernel
>= 4.10. Don
't try to build it."
302 if [ "${cross_arch}" = "riscv64" ] && verlt "${kversion}" "6.2"; then
303 echo "Ubuntu added RISC-V config to their 'regular
' kernels in v6.2. Don't try to build it.
"
307 fakeroot debian/rules clean KW_DEFCONFIG_DIR=.
309 # Hack for kernel Ubuntu-hwe-5.8
310 # The debian/control file is produced by the clean target above, so this
311 # check needs to happen afterwards.
312 if [ ! -f "debian
/compat
" ] && ! grep -q debhelper-compat debian/control; then
313 echo "10" > "debian
/compat
"
316 # genconfigs check can fail in certain cases, eg. when a more recent
317 # compiler exposes kernel configuration flags which aren't set in the
318 # Ubuntu annotations.
319 # In any case, the configuration will be updated with any missing values
320 # later in our build script.
321 fakeroot debian/rules genconfigs KW_DEFCONFIG_DIR=. do_skip_checks=true
322 cp CONFIGS/"${ubuntu_config}" .config
326 # Force 32bit build on i386, default is 64bit
327 if [ "$arch" = "i386
" ]; then
331 make "${vanilla_config}" "${make_args[@]}"
335 if [ "${vanilla_config}" = "pseries_defconfig
" ] && [ "${cross_arch}" = "ppc64el
" ] ; then
336 # @see diff <(git show v3.13:arch/powerpc/configs/pseries_defconfig) <(git show v3.13:arch/powerpc/configs/pseries_le_defconfig)
337 scripts/config --enable CONFIG_CPU_LITTLE_ENDIAN
338 scripts/config --enable CONFIG_CMA
339 scripts/config --disable CONFIG_XMON_DEFAULT
340 # scripts/config --disable CONFIG_VIRTUALIZATION
341 # scripts/config --disable CONFIG_KVM_BOOK3S_64
342 scripts/config --disable CONFIG_KVM_BOOK3S_64_HV
345 # oldnoconfig was renamed in 4.19
346 if vergte "$kversion" "4.19"; then
347 update_conf_target="olddefconfig
"
349 update_conf_target="oldnoconfig
"
352 # Fix 'defined(@array)' was removed from recent perl
353 if [ -f "kernel
/timeconst.pl
" ]; then
354 sed -i 's/defined(\@\(.*\))/@\1/' kernel/timeconst.pl
357 # Fix syntax of inline assembly which is confused with C++11 raw strings on gcc >= 5
358 if [ "$HOSTCC" != "gcc-4.8
" ]; then
359 if [ -f "arch
/x86
/kvm
/svm.c
" ]; then
360 sed -i 's/ R"/ R
"/g; s/"R
"/" R
"/g' arch/x86/kvm/svm.c
363 if [ -f "arch
/x86
/kvm
/vmx.c
" ]; then
364 sed -i 's/ R"/ R
"/g; s/"R
"/" R
"/g' arch/x86/kvm/vmx.c
368 if { verlt "${kversion}" "5.11"; } && { vergte "${kversion}" "4.10"; } ; then
369 # Binutils > 2.35 strips empty symbol tables, causing obltool to fail
370 # in certain cases when files are empty.
371 # @see https://gitlab.com/linux-kernel/stable/-/commit/1d489151e9f9d1647110277ff77282fe4d96d09b
373 # There doesn't seem to be any LD/AS/AR flags to control this behaviour,
374 # therefore patching tools/objtool/elf.c is attempted.
375 patch_linux_kernel
1d489151e9f9d1647110277ff77282fe4d96d09b
376 if { verlt
"${kversion}" "4.18"; } ; then
377 patch_linux_kernel e81e0724432542af8d8c702c31e9d82f57b1ff31
381 if { vergt
"${selected_cc_version}" "7"; } && { vergte "${kversion}" "4.14"; } && { verlt "${kversion}" "4.17"; } ; then
382 # Builds fail due to -Werror=restrict in pager.o and str_error_r.o
383 if { verlt "${kversion}" "4.16"; } ; then
384 # This is patched since objtool's Makefile doesn't respect HOSTCFLAGS
385 # @see https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ad343a98e74e85aa91d844310e797f96fee6983b
386 patch_linux_kernel ad343a98e74e85aa91d844310e797f96fee6983b
388 if { verlt "${kversion}" "4.17"; } ; then
389 # This is patched since objtool's Makefile doesn't respect HOSTCFLAGS
390 # @see https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=854e55ad289ef8888e7991f0ada85d5846f5afb9
391 patch_linux_kernel 854e55ad289ef8888e7991f0ada85d5846f5afb9
396 if { vergt "${selected_cc_version}" "9"; } && { verlt "${kversion}" "5.6"; } ; then
397 # Duplicate decalarations of __force_order
398 # @see https://gitlab.com/linux-kernel/stable/-/commit/df6d4f9db79c1a5d6f48b59db35ccd1e9ff9adfc
399 # However, kaslr_64.c doesn't exit in 4.15, 4.16, it's named pagetable.c
400 if [ -f arch
/x86
/boot
/compressed
/pagetable.c
] ; then
401 sed -i '/^unsigned long __force_order;$/d' arch
/x86
/boot
/compressed
/pagetable.c
403 if [ -f arch
/x86
/boot
/compressed
/kaslr_64.c
] ; then
404 patch_linux_kernel df6d4f9db79c1a5d6f48b59db35ccd1e9ff9adfc
408 if { vergte
"${kversion}" "4.18"; } && { verlt "${kversion}" "4.19"; } ; then
409 # In some cases, compiling net/bpfilter can fail with the following error:
410 # net/bpfilter/main.c:9:10: fatal error: include/uapi/linux/bpf.h: No such file or directory
411 # make[2]: *** [scripts/Makefile.host:107: net/bpfilter/main.o] Error 1
413 # While the issue is potentially in a number of old versions, it has only
414 # been observed in v4.18-rt
416 patch_linux_kernel 303a339f30a9441c4695d3d2cc78f1b33cd959ff
419 if { vergte "${kversion}" "4.18"; } && { verlt "${kversion}" "4.19"; } ; then
420 # In some cases, compiling net/bpfilter can fail with the following error:
421 # net/bpfilter/main.c:9:10: fatal error: include/uapi/linux/bpf.h: No such file or directory
422 # make[2]: *** [scripts/Makefile.host:107: net/bpfilter/main.o] Error 1
424 # While the issue is potentially in a number of old versions, it has only
425 # been observed in v4.18-rt
427 patch_linux_kernel
303a339f30a9441c4695d3d2cc78f1b33cd959ff
430 if { vergte
"${kversion}" "4.15"; } && { verlt "${kversion}" "4.18"; } ; then
431 # Some old kernels fail to build when make is too new
432 # @see https://gitlab.com/linux-kernel/stable/-/commit/9feeb638cde083c737e295c0547f1b4f28e99583
433 patch_linux_kernel 9564a8cf422d7b58f6e857e3546d346fa970191e
436 if { vergte "${kversion}" "4.14"; } && { verlt "${kversion}" "4.14.55"; } ; then
437 # Some old kernels fail to build when make is too new
438 # @see https://gitlab.com/linux-kernel/stable/-/commit/9feeb638cde083c737e295c0547f1b4f28e99583
439 patch_linux_kernel e82885490a611f2b75a6c27cd7bb09665c1740be
442 if ( { vergte
"${kversion}" "4.15"; } && { verlt "${kversion}" "4.18"; } ) || \
443 ( { vergte "${kversion}" "4.14"; } && { verlt "${kversion}" "4.14.56"; } ) ; then
444 # Some old kernels fail to build when make is too new
445 # @see https://gitlab.com/linux-kernel/stable/-/commit/9feeb638cde083c737e295c0547f1b4f28e99583
446 patch_linux_kernel
9feeb638cde083c737e295c0547f1b4f28e99583
449 if ( { vergte
"${kversion}" "4.12"; } && { verlt "${kversion}" "4.20.17"; } ) || \
450 ( { vergte "${kversion}" "5.0"; } && { verlt "${kversion}" "5.0.12"; } ) ; then
451 # Old kernels can fail to build while on newer host kernels with errors
453 # In file included from scripts/selinux/genheaders/genheaders.c:19:
454 # ./security/selinux/include/classmap.h:249:2: error: #error New address family defined, please update secclass_map.
455 # @see https://gitlab.com/linux-kernel/stable/-/commit/dfbd199a7cfe3e3cd8531e1353cdbd7175bfbc5e
457 patch_linux_kernel dfbd199a7cfe3e3cd8531e1353cdbd7175bfbc5e
460 # Compatibility with binutils >= ~ 2.31
461 if { vergte
"${kversion}" "3.19"; } && { verlt "${kversion}" "4.16"; } ; then
462 patch_linux_kernel b21ebf2fb4cde1618915a97cc773e287ff49173e
464 if { vergte "${kversion}" "3.17"; } && { verlt "${kversion}" "3.18.69"; } ; then
465 patch_linux_kernel edb9d2d5e647e7a8521b0d35f8452deb02dfd138
467 if { vergte
"${kversion}" "3.17"; } && { verlt "${kversion}" "3.18.100"; } ; then
468 patch_linux_kernel 3be6583f0b6f1bf1ee650ebf473d9dee36836527
469 patch_linux_kernel 12d839211d080f6a9c370398c41a260365d34c62
471 if { vergte "${kversion}" "3.16"; } && { verlt "${kversion}" "3.16.82"; } ; then
472 patch_linux_kernel ad10e6d464796f2a481de4039a43b9cfca034e1c
475 if ( { vergte
"${kversion}" "3.14"; } && { verlt "${kversion}" "4.4"; } ) ||
476 ( { vergte "${kversion}" "4.8"; } && { verlt "${kversion}" "4.18"; } ); then
477 # While the original motivation of this patch is for fixing builds using
478 # clang, the same error occurs between linux >= 3.14 and < 4.4, and in
480 # For rt-linux, the error has been observed in 4.8, 4.11, and 4.13.
482 # This patch only partially applies due to changes in kernel/Makefile,
483 # so a supplementary patch is needed
485 # Without this patch, builds fail with
486 # Cannot find symbol for section 2: .text.
487 # kernel/elfcore.o: failed
489 # @see https://github.com/linuxppc/issues/issues/388
490 # @see https://lore.kernel.org/lkml/20201204165742.3815221-2-arnd@kernel.org/
492 patch_linux_kernel
6e7b64b9dd6d96537d816ea07ec26b7dedd397b9
493 if grep -q elfcore.o kernel
/Makefile
; then
494 sed -i '/^.* += elfcore.o$/d' kernel
/Makefile
497 # Same as above for the v4.4 branch
498 if ( { vergte
"${kversion}" "4.4"; } && { verlt "${kversion}" "4.4.257"; } ); then
499 patch_linux_kernel 3140b0740b31cc63cf2ee08bc3f746b423eb068d
500 if grep -q elfcore.o kernel/Makefile ; then
501 sed -i '/^.* += elfcore.o$/d' kernel/Makefile
505 if { vergte "${kversion}" "4.5"; } && { verlt "${kversion}" "4.8"; } ; then
506 # Kernels between v4.5 and v4.8 built with gcc >= 8 on arm will hit an
509 # kernel/.tmp_fork.s: Assembler messages:
510 # kernel/.tmp_fork.s:1790: Error: .err encountered
512 # @see https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85745
514 patch_linux_kernel
9f73bd8bb445e0cbe4bcef6d4cfc788f1e184007
517 if ( { vergte
"${kversion}" "4.4"; } && { verlt "${kversion}" "4.4.136"; } ) ||
518 ( { vergte "${kversion}" "4.5"; } && { verlt "${kversion}" "4.8"; } ); then
519 # Hacky patch to deal with the following build error:
520 # Cannot find symbol for section 7: .text.unlikely.
521 # kernel/kexec_file.o: failed
522 # make[1]: *** [scripts/Makefile.build:291: kernel/kexec_file.o] Error 1
524 # This error happens with binutils 2.36 and 2.37, but should probably not
525 # be an issue with binutils 2.38.
526 # @see https://github.com/linuxppc/issues/issues/388
527 # @see https://github.com/bminor/binutils-gdb/commit/c09c8b42021180eee9495bd50d8b35e683d3901b
529 # There is some sort of config (unspecified in past discussions) which
530 # provokes the error, and there was never a potential fix merged in
531 # this discussion, in part because the build systems of the kernel
532 # switched to objtool instead.
534 # @see https://lore.kernel.org/all/20210215162209.5e2a475b@gandalf.local.home/
536 sed -i 's/return txtname;/return shdr0->sh_size ? txtname : NULL;/' scripts
/recordmcount.h
538 # After applying the above patch, the build continues but fails with
539 # head64.c:(.text.exit+0x5): undefined reference to `__gcov_exit'
541 scripts
/config
--disable CONFIG_GCOV_KERNEL
544 if { vergte
"${kversion}" "4.5"; } && { verlt "${kversion}" "4.5.5"; } ; then
545 # drivers/staging/wilc1000/wilc_spi.c:123:34: error: storage size of ‘wilc1000_spi_ops’ isn’t known
546 patch_linux_kernel ce7b516f3f9e11fe4ee06fad0d7e853bb6e8f160
549 # Newer binutils don't accept 3 operand 'cmp' instructions on ppc64
550 # Convert them to 'cmpw' which was previously done silently
551 if verlt "$kversion" "4.9"; then
552 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/"
553 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/"
554 sed -i "s
/\
$pie \
-o \"\
$ofile\"/\
$pie --no-dynamic-linker -o \"\
$ofile\"/" arch/powerpc/boot/wrapper
557 if [ "$
(scripts
/config
--state CONFIG_EXTCON_ADC_JACK
)" != "n
" ] &&
558 ( { vergte "${kversion}" "4.2"; } && { verlt "${kversion}" "4.12"; } ); then
559 # 73b6ecdb93e8e77752cae9077c424fcdc6f23c39 introduced a change where
560 # extcon-adc-jack.h has an incompatible pointer type.
561 # In GCC >= 5 this will provoke a warning and build failure.
563 # drivers/extcon/extcon-adc-jack.c: In function ‘adc_jack_probe’:
564 # 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]
565 # make[2]: *** [scripts/Makefile.build:295: drivers/extcon/extcon-adc-jack.o] Error 1
567 # 8a522bf2d4f788306443d36b26b54f0aedcdfdbe (in 4.11) has a fix for this warning
569 patch_linux_kernel
8a522bf2d4f788306443d36b26b54f0aedcdfdbe
572 if ( { vergte
"${kversion}" "4.15"; } && { verlt "${kversion}" "4.15.2"; } ) || \
573 ( { vergte "${kversion}" "4.14"; } && { verlt "${kversion}" "4.14.18"; } ) ; then
574 # Fix an objtool Segmentation fault
575 patch_linux_kernel dd12561854824fd1f05baf2a1b794faa046e2425
578 if { vergte
"${kversion}" "4.14"; } && { verlt "${kversion}" "4.14.268"; } ; then
579 # Builds fail due to -Werror=use-after-free in sigchain.o and help.o
580 patch_linux_kernel e89bb266b710ce056f141f29f091fd468a4a8185
583 # Fix a typo in v2.6.36.x
584 if [ -f "arch
/x86
/kernel
/entry_64.S
" ]; then
585 sed -i 's/END(do_hypervisor_callback)/END(xen_do_hypervisor_callback)/' arch/x86/kernel/entry_64.S
588 # Fix compiler switch in vdso Makefile for 2.6.36 to 2.6.36.2
589 if { vergte "$kversion" "2.6.36" && verlte "$kversion" "2.6.36.3"; }; then
590 sed -i 's/-m elf_x86_64/-m64/' arch/x86/vdso/Makefile
591 sed -i 's/-m elf_i386/-m32/' arch/x86/vdso/Makefile
594 # Fix kernel < 3.0 with gcc >= 4.7
595 if verlt "$kversion" "3.0"; then
596 sed -i '/linux\/compiler.h/a #include <linux\/linkage.h> \/* For asmregparm *\/' arch/x86/include/asm/ptrace.h
597 sed -i 's/extern long syscall_trace_enter/extern asmregparm long syscall_trace_enter/' arch/x86/include/asm/ptrace.h
598 sed -i 's/extern void syscall_trace_leave/extern asmregparm void syscall_trace_leave/' arch/x86/include/asm/ptrace.h
599 echo "header-y
+= linkage.h
" >> include/linux/Kbuild
602 if [ "${cross_arch}" = "powerpc
" ] ; then
603 if { vergte "${kversion}" "4.15"; } && { verlt "${kversion}" "4.16"; } ; then
604 # Avoid register errors such as
605 # aes_generic.c:(.text+0x4e0): undefined reference to `_restgpr_31_x'
606 # @see https://gitlab.com/linux-kernel/stable/-/commit/148b974deea927f5dbb6c468af2707b488bfa2de
608 CFLAGS_aes_generic.o
=''
613 if [ "$(scripts/config --state CONFIG_DEBUG_INFO_BTF)" == "y" ] &&
614 { vergte
"${pahole_version}" "1.24"; } &&
615 { vergte
"${kversion}" "5.10"; } && { verlt "${kversion}" "6.0"; } ;then
616 # Some kernels Eg. Ubuntu-hwe-5.13-5.13.0-52.59_20.04.1
617 # fail with the following error:
619 # FAILED: load BTF from vmlinux: Invalid argument
621 # When CONFIG_DEBUG_INFO_BTF is set, certain versions of pahole require
622 # `--skip_encoding_btf_enum64` to be passed as the kernel doesn't define
625 # Introduced in 341dfcf8d78eaa3a2dc96dea06f0392eb2978364 (~v5.10)
626 # @see https://lore.kernel.org/bpf/20220825171620.cioobudss6ovyrkc@altlinux.org/t/
628 if [ -f "scripts
/pahole-flags.sh
" ] ; then
629 # shellcheck disable=SC2016
630 sed -i 's/ -J ${PAHOLE_FLAGS} / -J ${PAHOLE_FLAGS} --skip_encoding_btf_enum64 /' scripts/link-vmlinux.sh
632 # shellcheck disable=SC2016
633 sed -i 's/ -J ${extra_paholeopt} / -J ${extra_paholeopt} --skip_encoding_btf_enum64 /' scripts/link-vmlinux.sh
638 if [ "$HOSTCC" == "gcc-4.8
" ]; then
639 scripts/config --disable CONFIG_CC_STACKPROTECTOR_STRONG
640 scripts/config --disable CONFIG_PPC_OF_BOOT_TRAMPOLINE
643 # Don't try to sign modules
644 scripts/config --disable CONFIG_MODULE_SIG
646 # Disable kernel stack frame correctness validation, introduced in 4.6.0 and currently fails
647 scripts/config --disable CONFIG_STACK_VALIDATION
649 # Cause problems with inline assembly on i386
650 scripts/config --disable CONFIG_DEBUG_SECTION_MISMATCH
652 # Don't build samples, they are broken on some kernel releases
653 scripts/config --disable CONFIG_SAMPLES
654 scripts/config --disable CONFIG_BUILD_DOCSRC
657 scripts/config --disable CONFIG_KCOV
659 # Broken on some RT kernels
660 scripts/config --disable CONFIG_HYPERV
663 scripts/config --disable CONFIG_RAPIDIO_TSI721
664 scripts/config --disable CONFIG_SGI_XP
665 scripts/config --disable CONFIG_MFD_WM8994
666 scripts/config --disable CONFIG_DRM_RADEON
667 scripts/config --disable CONFIG_SND_SOC_WM5100
668 # More recent compiler optimizations (from gcc 8 onwards )expose build errors
669 # with netronome on older kernels.
670 # Observed in 4.11-rt, 4.15-4.17, 5.0-rt - 5.16-rt
671 # It seems easier to disable the driver than to attempt patching.
673 # In function ‘ur_load_imm_any’,
674 # inlined from ‘jeq_imm’ at drivers/net/ethernet/netronome/nfp/bpf/jit.c:3146:13:
675 # ./include/linux/compiler.h:350:45: error: call to ‘__compiletime_assert_1062’ declared with attribute error: FIELD_FIT: value too large for the field
676 # 350 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
678 scripts/config --disable CONFIG_NET_VENDOR_NETRONOME
680 # In function ‘memcpy’,
681 # inlined from ‘kszphy_get_strings’ at drivers/net/phy/micrel.c:664:3:
682 # ./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
683 # 305 | __read_overflow2();
684 # | ^~~~~~~~~~~~~~~~~~
685 # make[3]: *** [scripts/Makefile.build:308: drivers/net/phy/micrel.o] Error 1
687 scripts/config --disable CONFIG_MICREL_PHY
690 # IGBVF won't build with recent gcc on 2.6.38.x
691 if { vergte "$kversion" "2.6.37" && verlt "$kversion" "2.6.38"; }; then
692 scripts/config --disable CONFIG_IGBVF
695 # Don't fail the build on warnings
696 scripts/config --disable CONFIG_WERROR
697 scripts/config --enable CONFIG_PPC_DISABLE_WERROR
699 # Set required options
700 scripts/config --enable CONFIG_TRACEPOINTS
701 scripts/config --enable CONFIG_KALLSYMS
702 scripts/config --enable CONFIG_HIGH_RES_TIMERS
703 scripts/config --enable CONFIG_KPROBES
704 scripts/config --enable CONFIG_FTRACE
705 scripts/config --enable CONFIG_BLK_DEV_IO_TRACE
706 scripts/config --enable CONFIG_KALLSYMS_ALL
707 scripts/config --enable CONFIG_HAVE_SYSCALL_TRACEPOINTS
708 scripts/config --enable CONFIG_PERF_EVENTS
709 scripts/config --enable CONFIG_EVENT_TRACING
710 scripts/config --enable CONFIG_KRETPROBES
712 if [ -n "${DEBUG}" ] ; then
716 make "$update_conf_target" "${make_args[@]}"
717 make -j"$NPROC" "${make_args[@]}"
719 krelease=$(make -s kernelrelease "${make_args[@]}")
721 # Save the kernel and modules
722 mkdir -p "$LINUX_INSTOBJ_DIR/boot
"
723 make INSTALL_MOD_PATH="$LINUX_INSTOBJ_DIR" INSTALL_MOD_STRIP=1 modules_install "${make_args[@]}"
724 make INSTALL_MOD_PATH="$LINUX_INSTOBJ_DIR" INSTALL_PATH="$LINUX_INSTOBJ_DIR/boot
" install "${make_args[@]}"
725 rm -f "$LINUX_INSTOBJ_DIR/lib
/modules
/${krelease}/source" "$LINUX_INSTOBJ_DIR/lib
/modules
/${krelease}/build
"
726 ln -s ../../../../sources "$LINUX_INSTOBJ_DIR/lib
/modules
/${krelease}/source"
727 ln -s ../../../../sources "$LINUX_INSTOBJ_DIR/lib
/modules
/${krelease}/source"
731 extract_distro_headers() {
733 # Enter linux source dir
734 cd "${LINUX_SRCOBJ_DIR}"
737 # For RT kernels, copy version file
738 if [ -s localversion-rt ]; then
739 cp -a localversion-rt "${LINUX_HDROBJ_DIR}"
742 # Copy all Makefile related stuff
743 find . -path './include/*' -prune \
744 -o -path './scripts/*' -prune -o -type f \
745 \( -name 'Makefile*' -o -name 'Kconfig*' -o -name 'Kbuild*' -o \
746 -name '*.sh' -o -name '*.pl' -o -name '*.lds' \) \
747 -print | cpio -pd --preserve-modification-time "${LINUX_HDROBJ_DIR}"
749 # Copy base scripts and include dirs
750 cp -a scripts include "${LINUX_HDROBJ_DIR}"
753 (find arch -name include -type d -print0 | \
754 xargs -0 -n1 -I '{}' find '{}' -type f) | \
755 cpio -pd --preserve-modification-time "${LINUX_HDROBJ_DIR}"
758 (find arch -name scripts -type d -print0 | \
759 xargs -0 -n1 -I '{}' find '{}' -type f) | \
760 cpio -pd --preserve-modification-time "${LINUX_HDROBJ_DIR}"
763 rm -f "${LINUX_HDROBJ_DIR}/scripts
/*.o
"
764 rm -f "${LINUX_HDROBJ_DIR}/scripts
/*/*.o
"
766 # On powerpc 32bits this object is required to link modules
767 if [ "${karch}" = "powerpc
" ]; then
768 if [ "$
(scripts
/config
-s CONFIG_PPC64
)" = "y
" ] && vergte "${kversion}" "5.4"; then
771 cp -a --parents arch/powerpc/lib/crtsavres.[So] "${LINUX_HDROBJ_DIR}/"
775 # On arm64 between 4.13 and 1.15 this object is required to build with ftrace support
776 if [ "${karch}" = "arm64
" ]; then
777 if [ -f "arch
/arm64
/kernel
/ftrace-mod.S
" ]; then
778 cp -a --parents arch/arm64/kernel/ftrace-mod.[So] "${LINUX_HDROBJ_DIR}/"
782 # On riscv with 5.14 the vsdo objects are required
783 if [ "${karch}" = "riscv
" ] && \
784 ( { vergte "${kversion}" "5.14"; } && { verlt "${kversion}" "5.15"; } ); then
785 cp -a --parents arch
/riscv
/kernel
/vdso
/*.o
"${LINUX_HDROBJ_DIR}/"
788 # Newer kernels need objtool to build modules when CONFIG_STACK_VALIDATION=y
789 if [ -f tools
/objtool
/objtool
]; then
790 cp -a --parents tools
/objtool
/objtool
"${LINUX_HDROBJ_DIR}/"
793 if [ -f "arch/x86/kernel/macros.s" ]; then
794 cp -a --parents arch
/x86
/kernel
/macros.s
"${LINUX_HDROBJ_DIR}/"
797 # Copy modules related stuff, if available
798 if [ -s Module.symvers
]; then
799 cp Module.symvers
"${LINUX_HDROBJ_DIR}"
802 if [ -s System.map
]; then
803 cp System.map
"${LINUX_HDROBJ_DIR}"
806 if [ -s Module.markers
]; then
807 cp Module.markers
"${LINUX_HDROBJ_DIR}"
811 cp .config
"${LINUX_HDROBJ_DIR}"
813 # Make sure the Makefile and version.h have a matching timestamp so that
814 # external modules can be built
815 if [ -s "${LINUX_HDROBJ_DIR}/include/generated/uapi/linux/version.h" ]; then
816 touch -r "${LINUX_HDROBJ_DIR}/Makefile" "${LINUX_HDROBJ_DIR}/include/generated/uapi/linux/version.h"
817 elif [ -s "${LINUX_HDROBJ_DIR}/include/linux/version.h" ]; then
818 touch -r "${LINUX_HDROBJ_DIR}/Makefile" "${LINUX_HDROBJ_DIR}/include/linux/version.h"
820 echo "Missing version.h"
823 touch -r "${LINUX_HDROBJ_DIR}/.config" "${LINUX_HDROBJ_DIR}/include/generated/autoconf.h"
825 # Copy .config to include/config/auto.conf so "make prepare" is unnecessary.
826 if [ ! -f "${LINUX_HDROBJ_DIR}/include/config/auto.conf" ]; then
827 cp "${LINUX_HDROBJ_DIR}/.config" "${LINUX_HDROBJ_DIR}/include/config/auto.conf"
830 # Finally clean the object files from the full source tree
833 # And regen the modules support files
834 make modules_prepare
"${make_args[@]}"
836 # On powerpc 32bits this object is required to link modules
837 if [ "${karch}" = "powerpc" ]; then
838 if [ "$(scripts/config -s CONFIG_PPC64)" = "y" ] && vergte
"${kversion}" "5.4"; then
841 make arch
/powerpc
/lib
/crtsavres.o
"${make_args[@]}"
845 # On arm64 between 4.13 and 4.15 this object is required to build with ftrace support
846 if [ "${karch}" = "arm64" ]; then
847 if [ -f "arch/arm64/kernel/ftrace-mod.S" ]; then
848 make arch
/arm64
/kernel
/ftrace-mod.o
"${make_args[@]}"
852 # Version specific tasks
855 # Add Ubuntu ABI number to kernel headers, this is normally done by the packaging code
856 ABINUM
="$(echo "$ktag" | grep -P -o 'Ubuntu-(lts-)?.*-\K\d+(?=\..*)')"
857 echo "#define UTS_UBUNTU_RELEASE_ABI $ABINUM" >> include
/generated
/utsrelease.h
858 echo "#define UTS_UBUNTU_RELEASE_ABI $ABINUM" >> "${LINUX_HDROBJ_DIR}/include/generated/utsrelease.h"
870 kversion
=$
(make -C "$LINUX_HDROBJ_DIR" -s kernelversion
)
872 # Try to catch some compatibility problems by turning some
873 # warnings into errors.
874 #export KCFLAGS="$KCFLAGS -Wall -Werror"
876 # Enter lttng-modules source dir
877 cd "${MODULES_GIT_DIR}"
879 # kernels 3.10 to 3.10.13 and 3.11 to 3.11.2 introduce a deadlock in the
880 # timekeeping subsystem. We want those build to fail.
881 if { vergte
"$kversion" "3.10" && verlte
"$kversion" "3.10.13"; } || \
882 { vergte
"$kversion" "3.11" && verlte
"$kversion" "3.11.2"; }; then
887 KERNELDIR
="${kdir}" make -j"${NPROC}" V=1 "${make_args[@]}"
892 # We expect this build to fail, if it doesn't, fail the job.
893 if [ "$ret" -eq 0 ]; then
894 echo "This build should have failed."
898 # We have to publish at least one file or the build will fail
899 echo "This kernel is broken, there is a deadlock in the timekeeping subsystem." > "${outdir}/BROKEN.txt.ko"
901 KERNELDIR
="${kdir}" make clean
905 # Build modules against full kernel sources
906 KERNELDIR
="${kdir}" make -j"${NPROC}" V=1 "${make_args[@]}"
908 # Install modules to build dir
909 KERNELDIR
="${kdir}" make INSTALL_MOD_PATH
="${outdir}" modules_install
912 KERNELDIR
="${kdir}" make clean
922 MODULES_GIT_DIR
="${WORKSPACE}/src/lttng-modules"
923 LINUX_GIT_DIR
="${WORKSPACE}/src/linux"
925 LINUX_OBJ_DIR
="${WORKSPACE}/linux"
926 LINUX_SRCOBJ_DIR
="${LINUX_OBJ_DIR}/sources"
927 LINUX_HDROBJ_DIR
="${LINUX_OBJ_DIR}/headers"
928 LINUX_INSTOBJ_DIR
="${LINUX_OBJ_DIR}/install"
930 MODULES_OUTPUT_KSRC_DIR
="${WORKSPACE}/build/lttng-modules-ksrc"
931 MODULES_OUTPUT_KHDR_DIR
="${WORKSPACE}/build/lttng-modules-khdr"
933 LINUX_GIT_REF_REPO_DIR
="$HOME/gitcache/linux-stable.git/"
935 OBJ_STORE_URL
="s3://jenkins"
939 # Create build directories
940 mkdir
-p "${LINUX_SRCOBJ_DIR}" "${LINUX_HDROBJ_DIR}" "${LINUX_INSTOBJ_DIR}" "${MODULES_OUTPUT_KSRC_DIR}" "${MODULES_OUTPUT_KHDR_DIR}"
942 print_header
"Clone LTTng-modules sources"
943 git_clone_modules_sources
945 # Setup cross compile env if available
946 if [ "x${cross_arch}" != "x" ]; then
948 case "$cross_arch" in
951 cross_compile
="arm-linux-gnueabihf-"
952 vanilla_config
="imx_v6_v7_defconfig"
953 ubuntu_config
="armhf-config.flavour.generic"
958 cross_compile
="aarch64-linux-gnu-"
959 vanilla_config
="defconfig"
960 ubuntu_config
="arm64-config.flavour.generic"
965 cross_compile
="powerpc-linux-gnu-"
966 vanilla_config
="ppc44x_defconfig"
967 ubuntu_config
="powerpc-config.flavour.powerpc-smp"
972 cross_compile
="powerpc64le-linux-gnu-"
973 vanilla_config
="pseries_le_defconfig"
974 ubuntu_config
="ppc64el-config.flavour.generic"
979 cross_compile
="riscv64-linux-gnu-"
980 vanilla_config
="defconfig"
981 ubuntu_config
="riscv64-config.flavour.generic"
985 echo "Unsupported cross arch $cross_arch"
990 # Export variables used by Kbuild for cross compilation
991 export ARCH
="${karch}"
992 export CROSS_COMPILE
="${cross_compile}"
994 # Set arch specific values if we are not cross compiling
995 elif [ "x${arch}" != "x" ]; then
1000 vanilla_config
="allmodconfig"
1001 ubuntu_config
="i386-config.flavour.generic"
1006 vanilla_config
="allmodconfig"
1007 ubuntu_config
="amd64-config.flavour.generic"
1012 vanilla_config
="allmodconfig"
1013 ubuntu_config
="armhf-config.flavour.generic"
1018 vanilla_config
="allmodconfig"
1019 ubuntu_config
="arm64-config.flavour.generic"
1024 vanilla_config
="allmodconfig"
1025 ubuntu_config
="powerpc-config.flavour.powerpc-smp"
1030 vanilla_config
="allmodconfig"
1031 ubuntu_config
="ppc64el-config.flavour.generic"
1036 vanilla_config
="allmodconfig"
1037 ubuntu_config
="riscv64-config.flavour.generic"
1041 echo "Unsupported arch $arch"
1046 echo "No arch or cross_arch specified"
1052 # First get the kernel build from the object store, or build it, if it's
1056 echo "# Setup endpoint
1057 host_base = obj.internal.efficios.com
1058 host_bucket = obj.internal.efficios.com
1059 bucket_location = us-east-1
1063 access_key = jenkins
1064 secret_key = echo123456
1066 # Enable S3 v4 signature APIs
1067 signature_v2 = False" > "$WORKSPACE/.s3cfg"
1070 url_hash
="$(echo -n "$kgitrepo" | md5sum | awk '{ print $1 }')"
1071 obj_name
="linux.tar.bz2"
1073 if [ -z "${cross_arch}" ]; then
1074 obj_url_prefix
="$OBJ_STORE_URL/linux-build/$url_hash/$ktag/platform-${platform}/$arch/native"
1076 obj_url_prefix
="$OBJ_STORE_URL/linux-build/$url_hash/$ktag/platform-${platform}/${cross_arch}"
1079 obj_url
="$obj_url_prefix/$obj_name"
1082 # In s3cmd 2.3, the return code of get when an object does not exist (64)
1083 # is different than in 2.2 (12). The return codes of 's3cmd info' are
1084 # consistent between 2.2 and 2.3.
1085 s3cmd
-c "$WORKSPACE/.s3cfg" info
"$obj_url"
1091 print_header
"Get sources and prebuilt kernel"
1092 s3cmd
-c "$WORKSPACE/.s3cfg" get
"$obj_url"
1095 print_header
"Select compiler and set build flags"
1101 print_header
"Clone kernel sources"
1103 # Build all the things and upload
1104 # then finish the module build...
1106 git_clone_linux_sources
1107 git_export_linux_sources
1109 print_header
"Select compiler and set build flags"
1113 ## PREPARE FULL LINUX SOURCE TREE
1114 print_header
"Build kernel from source"
1117 ## EXTRACT DISTRO STYLE KERNEL HEADERS / DEVEL
1118 extract_distro_headers
1120 print_header
"Upload kernel to object storage"
1127 echo "Unknown error? Abort"
1134 # Either we downloaded a pre-build kernel or we built it and uploaded
1135 # the archive for future builds.
1139 print_header
"Build modules against full kernel sources"
1140 build_modules
"${LINUX_SRCOBJ_DIR}" "${MODULES_OUTPUT_KSRC_DIR}"
1142 print_header
"Build modules against kernel headers"
1143 build_modules
"${LINUX_HDROBJ_DIR}" "${MODULES_OUTPUT_KHDR_DIR}"
1146 print_header
"Check for built modules in install directory"
1148 # Make sure some modules were actually built
1149 tree
"${MODULES_OUTPUT_KSRC_DIR}"
1150 if [ "x$(find "${MODULES_OUTPUT_KSRC_DIR}" -name '*.ko*' -printf yes -quit)" != "xyes" ]; then
1151 echo "No modules built!"
1155 tree
"${MODULES_OUTPUT_KHDR_DIR}"
1156 if [ "x$(find "${MODULES_OUTPUT_KHDR_DIR}" -name '*.ko*' -printf yes -quit)" != "xyes" ]; then
1157 echo "No modules built!"