3 # Copyright (C) 2016-2019 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 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]}"
33 cross_arch
=${cross_arch:-}
35 kgitrepo
=${kgitrepo:-}
36 mversion
=${mversion:-}
37 mgitrepo
=${mgitrepo:-}
44 # Kernel version compare functions
46 [ "$1" = "$(printf '%s\n%s' "$1" "$2" | sort -V | head -n1)" ]
50 # shellcheck disable=SC2015
51 [ "$1" = "$2" ] && return 1 || verlte
"$1" "$2"
55 [ "$1" = "$(printf '%s\n%s' "$1" "$2" | sort -V | tail -n1)" ]
59 # shellcheck disable=SC2015
60 [ "$1" = "$2" ] && return 1 || vergte
"$1" "$2"
63 git_clone_modules_sources
() {
64 mkdir
-p "$MODULES_GIT_DIR"
66 # If the version starts with "refs/", checkout the specific git ref, otherwise treat it
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
"${mversion}" && git checkout FETCH_HEAD
)
72 git clone
--no-tags --depth=1 -b "${mversion}" "${mgitrepo}" "$MODULES_GIT_DIR"
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}" "$LINUX_GIT_DIR"
83 # Export the kernel sources from the git repo
84 git_export_linux_sources
() {
86 git archive
"${ktag}" |
tar -x -C "$LINUX_SRCOBJ_DIR"
90 # Upload the tar archive to the object store
91 upload_archive_obj
() {
92 s3cmd
-c "$WORKSPACE/.s3cfg" put
"$WORKSPACE/$obj_name" "$obj_url_prefix/"
93 rm -f "$WORKSPACE/$obj_name"
97 extract_archive_obj
() {
98 tar -xf "$WORKSPACE/$obj_name" -C "$LINUX_OBJ_DIR" -I pbzip2
99 rm -f "$WORKSPACE/$obj_name"
105 tar -cf "$WORKSPACE/$obj_name" -I pbzip2 .
112 IFS
=: read -r -a path_array
<<< "$PATH"
113 while read -r gcc
; do
115 done < <(find "${path_array[@]}" -maxdepth 1 -regex '.*/gcc-[0-9\.]+$' -printf '%f\n' |
sort -t- -k2 -V -r)
119 # Find the most recent GCC version supported by the kernel sources
123 cd "$LINUX_SRCOBJ_DIR"
125 kversion
=$
(make -s kernelversion
)
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 "${cc_version}" "11"; } ; then
133 # Using gcc-12+ with '-Wuse-after-free' breaks the build of older
134 # kernels (in particular, objtool). Some releases on LTS
135 # branches between 4.x and 5.15 can be built with gcc-12.
136 # @see https://lore.kernel.org/lkml/20494.1643237814@turing-police/
137 # @see https://gitlab.com/linux-kernel/stable/-/commit/52a9dab6d892763b2a8334a568bd4e2c1a6fde66
147 # Force gcc-4.8 for kernels before 4.4
148 if { verlt "$kversion" "4.4"; }; then
149 selected_cc='gcc-4.8'
152 if [ "x
$selected_cc" = "x
" ]; then
153 echo "Found no suitable compiler.
"
161 if [ "$selected_cc" != "gcc-4.8
" ]; then
162 # Older kernel Makefiles do not expect the compiler to default to PIE
169 _KCPPFLAGS+=(-fno-pie)
172 selected_cc_version="$
(echo "${selected_cc}" | cut
-d'-' -f2)"
173 if { vergte "${selected_cc_version}" "10"; } && { verlt "${kversion}" "5.10"; } ; then
174 # gcc-10 changed the default from '-fcommon' to '-fno-common', which
175 # causes a linker failure. '-fcommon' can be set on the HOSTCFLAGS
176 # to avoid the issue.
177 # @see https://gitlab.com/linux-kernel/stable/-/commit/e33a814e772cdc36436c8c188d8c42d019fda639
178 _HOSTCFLAGS
+=(-fcommon)
181 if [ "${cross_arch:-}" == "armhf" ] ; then
182 if { verlt
"${kversion}" "5.14"; } ; then
183 # Work-around for producing instructions that aren't valid for the
184 # default architectures.
185 # Eg. Error: selected processor does not support `cpsid i' in ARM mode
186 _KCFLAGS
+=(-march=armv7-a
-mfpu=vfpv3-d16
)
187 _KCPPFLAGS
+=(-march=armv7-a
-mfpu=vfpv3-d16
)
191 if { vergt
"${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)
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="${selected_cc}"
207 HOSTCFLAGS="${HOSTCFLAGS:-}"
209 if [ -n "${DEBUG}" ] ; then
217 patch_linux_kernel() {
221 git -C "${LINUX_GIT_REF_REPO_DIR}" format-patch -n1 --stdout "${commit_hash}" | patch -p1
223 if [ "$?
" -gt 1 ] ; then
224 echo "Serious issue patching
"
229 build_linux_kernel() {
230 cd "$LINUX_SRCOBJ_DIR"
232 kversion=$(make -s kernelversion "${make_args[@]}")
233 pahole_version="$
(pahole
--version |
tr -d 'v')"
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 "${kversion}" "3.2"; } ; then
238 vanilla_config='mx5_defconfig'
240 vanilla_config='mx51_defconfig'
244 if { verlt "${kversion}" "3.13"; } && [ "${vanilla_config}" = "pseries_le_defconfig
" ] ; then
245 # pseries_le_deconfig was introduced in f53e462e907cbaed29c49c0f10f5b8f614e1bf1d
246 vanilla_config='pseries_defconfig'
249 # Generate kernel configuration
252 if [ "${cross_arch}" = "powerpc
" ]; then
253 if vergte "${kversion}" "4.10"; then
254 echo "Ubuntu removed big endian powerpc configuration from kernel
>= 4.10. Don
't try to build it."
259 # Disable riscv64 config generation, we don't have a toolchain on bionic
260 sed -i 's/riscv64 //' debian.master
/etc
/kernelconfig
262 fakeroot debian
/rules clean KW_DEFCONFIG_DIR
=.
264 # Hack for kernel Ubuntu-hwe-5.8
265 # The debian/control file is produced by the clean target above, so this
266 # check needs to happen afterwards.
267 if [ ! -f "debian/compat" ] && ! grep -q debhelper-compat debian
/control
; then
268 echo "10" > "debian/compat"
271 # genconfigs check can fail in certain cases, eg. when a more recent
272 # compiler exposes kernel configuration flags which aren't set in the
273 # Ubuntu annotations.
274 # In any case, the configuration will be updated with any missing values
275 # later in our build script.
276 fakeroot debian
/rules genconfigs KW_DEFCONFIG_DIR
=. do_skip_checks
=true
277 cp CONFIGS
/"${ubuntu_config}" .config
281 # Force 32bit build on i386, default is 64bit
282 if [ "$arch" = "i386" ]; then
286 make "${vanilla_config}" "${make_args[@]}"
290 if [ "${vanilla_config}" = "pseries_defconfig" ] && [ "${cross_arch}" = "ppc64el" ] ; then
291 # @see diff <(git show v3.13:arch/powerpc/configs/pseries_defconfig) <(git show v3.13:arch/powerpc/configs/pseries_le_defconfig)
292 scripts
/config
--enable CONFIG_CPU_LITTLE_ENDIAN
293 scripts
/config
--enable CONFIG_CMA
294 scripts
/config
--disable CONFIG_XMON_DEFAULT
295 # scripts/config --disable CONFIG_VIRTUALIZATION
296 # scripts/config --disable CONFIG_KVM_BOOK3S_64
297 scripts
/config
--disable CONFIG_KVM_BOOK3S_64_HV
300 # oldnoconfig was renamed in 4.19
301 if vergte
"$kversion" "4.19"; then
302 update_conf_target
="olddefconfig"
304 update_conf_target
="oldnoconfig"
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
312 # Fix syntax of inline assembly which is confused with C++11 raw strings on gcc >= 5
313 if [ "$HOSTCC" != "gcc-4.8" ]; then
314 if [ -f "arch/x86/kvm/svm.c" ]; then
315 sed -i 's/ R"/ R "/g; s/"R"/" R "/g' arch
/x86
/kvm
/svm.c
318 if [ -f "arch/x86/kvm/vmx.c" ]; then
319 sed -i 's/ R"/ R "/g; s/"R"/" R "/g' arch
/x86
/kvm
/vmx.c
323 if { verlt
"${kversion}" "5.11"; } && { vergte "${kversion}" "4.10"; } ; then
324 # Binutils > 2.35 strips empty symbol tables, causing obltool to fail
325 # in certain cases when files are empty.
326 # @see https://gitlab.com/linux-kernel/stable/-/commit/1d489151e9f9d1647110277ff77282fe4d96d09b
328 # There doesn't seem to be any LD/AS/AR flags to control this behaviour,
329 # therefore patching tools/objtool/elf.c is attempted.
330 patch_linux_kernel 1d489151e9f9d1647110277ff77282fe4d96d09b
331 if { verlt "${kversion}" "4.18"; } ; then
332 patch_linux_kernel e81e0724432542af8d8c702c31e9d82f57b1ff31
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
343 if { verlt
"${kversion}" "4.17"; } ; then
344 # This is patched since objtool's Makefile doesn't respect HOSTCFLAGS
345 # @see https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=854e55ad289ef8888e7991f0ada85d5846f5afb9
346 patch_linux_kernel
854e55ad289ef8888e7991f0ada85d5846f5afb9
349 # Duplicate decalarations of __force_order
350 # @see https://gitlab.com/linux-kernel/stable/-/commit/df6d4f9db79c1a5d6f48b59db35ccd1e9ff9adfc
351 # However, kaslr_64.c doesn't exit in 4.15, 4.16, it's named pagetable.c
352 if [ -f arch
/x86
/boot
/compressed
/pagetable.c
] ; then
353 sed -i '/^unsigned long __force_order;$/d' arch
/x86
/boot
/compressed
/pagetable.c
357 if { vergte
"${kversion}" "4.15"; } && { verlt "${kversion}" "4.18"; } ; then
358 # Some old kernels fail to build when make is too new
359 # @see https://gitlab.com/linux-kernel/stable/-/commit/9feeb638cde083c737e295c0547f1b4f28e99583
360 patch_linux_kernel 9564a8cf422d7b58f6e857e3546d346fa970191e
361 # @see https://gitlab.com/linux-kernel/stable/-/commit/9feeb638cde083c737e295c0547f1b4f28e99583
362 patch_linux_kernel 9feeb638cde083c737e295c0547f1b4f28e99583
365 if { vergte "${kversion}" "4.12"; } && { verlt "${kversion}" "4.19"; } ; then
366 # Old kernels can fail to build while on newer host kernels with errors
368 # In file included from scripts/selinux/genheaders/genheaders.c:19:
369 # ./security/selinux/include/classmap.h:249:2: error: #error New address family defined, please update secclass_map.
370 # @see https://gitlab.com/linux-kernel/stable/-/commit/dfbd199a7cfe3e3cd8531e1353cdbd7175bfbc5e
372 patch_linux_kernel dfbd199a7cfe3e3cd8531e1353cdbd7175bfbc5e
375 if { vergte
"${kversion}" "3.18"; } && { verlt "${kversion}" "4.4"; } ; then
376 # Compatibility with binutils >= ~ 2.31
377 patch_linux_kernel b21ebf2fb4cde1618915a97cc773e287ff49173e
380 # The above patch only partially applies linux 3.17, and has been, so a
381 # rebased version is used instead.
382 if { vergte "${kversion}" "3.17"; } && { verlt "${kversion}" "3.18"; } ; then
383 cat <<'EOF' | patch -p1
384 diff --git a/arch/x86/kernel/machine_kexec_64.c b/arch/x86/kernel/machine_kexec_64.c
385 index 48598105..0652c5b6 100644
386 --- a/arch/x86/kernel/machine_kexec_64.c
387 +++ b/arch/x86/kernel/machine_kexec_64.c
388 @@ -516,6 +516,7 @@ int arch_kexec_apply_relocations_add(const Elf64_Ehdr *ehdr,
392 + case R_X86_64_PLT32:
393 value -= (u64)address;
394 *(u32 *)location = value;
396 diff --git a/arch/x86/kernel/module.c b/arch/x86/kernel/module.c
397 index e69f9882..7c6bc9fe 100644
398 --- a/arch/x86/kernel/module.c
399 +++ b/arch/x86/kernel/module.c
400 @@ -180,6 +180,7 @@ int apply_relocate_add(Elf64_Shdr *sechdrs,
404 + case R_X86_64_PLT32:
408 diff --git a/arch/x86/tools/relocs.c b/arch/x86/tools/relocs.c
409 index bbb1d225..8deeacbc 100644
410 --- a/arch/x86/tools/relocs.c
411 +++ b/arch/x86/tools/relocs.c
412 @@ -763,6 +763,7 @@ static int do_reloc64(struct section *sec, Elf_Rel *rel, ElfW(Sym) *sym,
416 + case R_X86_64_PLT32:
418 * NONE can be ignored and PC relative relocations don't
419 * need to be adjusted.
423 if ( { vergte
"${kversion}" "3.15"; } && { verlt "${kversion}" "4.4"; } ) ||
424 ( { vergte "${kversion}" "4.15"; } && { verlt "${kversion}" "4.17"; } ); then
425 # While the original motivation of this patch is for fixing builds using
426 # clang, the same error occurs between linux >= 3.15 and < 4.4, and in
429 # This patch only partially applies due to changes in kernel/Makefile,
430 # so a supplementary patch is needed
432 # Without this patch, builds fail with
433 # Cannot find symbol for section 2: .text.
434 # kernel/elfcore.o: failed
436 # @see https://github.com/linuxppc/issues/issues/388
437 # @see https://lore.kernel.org/lkml/20201204165742.3815221-2-arnd@kernel.org/
439 patch_linux_kernel
6e7b64b9dd6d96537d816ea07ec26b7dedd397b9
440 if grep -q elfcore.o kernel
/Makefile
; then
441 sed -i '/^.* += elfcore.o$/d' kernel
/Makefile
445 # Newer binutils don't accept 3 operand 'cmp' instructions on ppc64
446 # Convert them to 'cmpw' which was previously done silently
447 if verlt
"$kversion" "4.9"; then
448 find arch
/powerpc
/ -name "*.S" -print0 |
xargs -0 sed -i "s/\(cmp\)\(\s\+[a-zA-Z0-9]\+,\s*[a-zA-Z0-9]\+,\s*[a-zA-Z0-9]\+\)/cmpw\2/"
449 find arch
/powerpc
/ -name "*.S" -print0 |
xargs -0 sed -i "s/\(cmpli\)\(\s\+[a-zA-Z0-9]\+,\s*[a-zA-Z0-9]\+,\s*[a-zA-Z0-9]\+\)/cmplwi\2/"
450 sed -i "s/\$pie \-o \"\$ofile\"/\$pie --no-dynamic-linker -o \"\$ofile\"/" arch
/powerpc
/boot
/wrapper
453 # Fix a typo in v2.6.36.x
454 if [ -f "arch/x86/kernel/entry_64.S" ]; then
455 sed -i 's/END(do_hypervisor_callback)/END(xen_do_hypervisor_callback)/' arch
/x86
/kernel
/entry_64.S
458 # Fix compiler switch in vdso Makefile for 2.6.36 to 2.6.36.2
459 if { vergte
"$kversion" "2.6.36" && verlte
"$kversion" "2.6.36.3"; }; then
460 sed -i 's/-m elf_x86_64/-m64/' arch
/x86
/vdso
/Makefile
461 sed -i 's/-m elf_i386/-m32/' arch
/x86
/vdso
/Makefile
464 # Fix kernel < 3.0 with gcc >= 4.7
465 if verlt
"$kversion" "3.0"; then
466 sed -i '/linux\/compiler.h/a #include <linux\/linkage.h> \/* For asmregparm *\/' arch
/x86
/include
/asm
/ptrace.h
467 sed -i 's/extern long syscall_trace_enter/extern asmregparm long syscall_trace_enter/' arch
/x86
/include
/asm
/ptrace.h
468 sed -i 's/extern void syscall_trace_leave/extern asmregparm void syscall_trace_leave/' arch
/x86
/include
/asm
/ptrace.h
469 echo "header-y += linkage.h" >> include
/linux
/Kbuild
472 if [ "${cross_arch}" = "powerpc" ] ; then
473 if { vergte
"${kversion}" "4.15"; } && { verlt "${kversion}" "4.16"; } ; then
474 # Avoid register errors such as
475 # aes_generic.c:(.text+0x4e0): undefined reference to `_restgpr_31_x'
476 # @see https://gitlab.com/linux-kernel/stable/-/commit/148b974deea927f5dbb6c468af2707b488bfa2de
478 CFLAGS_aes_generic.o=''
483 if [ "$
(scripts
/config
--state CONFIG_DEBUG_INFO_BTF
)" == "y
" ] &&
484 { vergte "${pahole_version}" "1.24"; } &&
485 { vergte "${kversion}" "5.10"; } && { verlt "${kversion}" "6.0"; } ;then
486 # Some kernels Eg. Ubuntu-hwe-5.13-5.13.0-52.59_20.04.1
487 # fail with the following error:
489 # FAILED: load BTF from vmlinux: Invalid argument
491 # When CONFIG_DEBUG_INFO_BTF is set, certain versions of pahole require
492 # `--skip_encoding_btf_enum64` to be passed as the kernel doesn't define
495 # Introduced in 341dfcf8d78eaa3a2dc96dea06f0392eb2978364 (~v5.10)
496 # @see https://lore.kernel.org/bpf/20220825171620.cioobudss6ovyrkc@altlinux.org/t/
498 if [ -f "scripts/pahole-flags.sh" ] ; then
499 sed -i 's/ -J ${PAHOLE_FLAGS} / -J ${PAHOLE_FLAGS} --skip_encoding_btf_enum64 /' scripts
/link-vmlinux.sh
501 sed -i 's/ -J ${extra_paholeopt} / -J ${extra_paholeopt} --skip_encoding_btf_enum64 /' scripts
/link-vmlinux.sh
506 if [ "$HOSTCC" == "gcc-4.8" ]; then
507 scripts
/config
--disable CONFIG_CC_STACKPROTECTOR_STRONG
508 scripts
/config
--disable CONFIG_PPC_OF_BOOT_TRAMPOLINE
511 # Don't try to sign modules
512 scripts
/config
--disable CONFIG_MODULE_SIG
514 # Disable kernel stack frame correctness validation, introduced in 4.6.0 and currently fails
515 scripts
/config
--disable CONFIG_STACK_VALIDATION
517 # Cause problems with inline assembly on i386
518 scripts
/config
--disable CONFIG_DEBUG_SECTION_MISMATCH
520 # Don't build samples, they are broken on some kernel releases
521 scripts
/config
--disable CONFIG_SAMPLES
522 scripts
/config
--disable CONFIG_BUILD_DOCSRC
525 scripts
/config
--disable CONFIG_KCOV
527 # Broken on some RT kernels
528 scripts
/config
--disable CONFIG_HYPERV
531 scripts
/config
--disable CONFIG_RAPIDIO_TSI721
532 scripts
/config
--disable CONFIG_SGI_XP
533 scripts
/config
--disable CONFIG_MFD_WM8994
534 scripts
/config
--disable CONFIG_DRM_RADEON
535 scripts
/config
--disable CONFIG_SND_SOC_WM5100
536 # More recent compiler optimizations (from gcc 8 onwards )expose build errors
537 # with netronome on older kernels.
538 # Observed in 4.11-rt, 4.15-4.17, 5.0-rt - 5.16-rt
539 # It seems easier to disable the driver than to attempt patching.
541 # In function ‘ur_load_imm_any’,
542 # inlined from ‘jeq_imm’ at drivers/net/ethernet/netronome/nfp/bpf/jit.c:3146:13:
543 # ./include/linux/compiler.h:350:45: error: call to ‘__compiletime_assert_1062’ declared with attribute error: FIELD_FIT: value too large for the field
544 # 350 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
546 scripts
/config
--disable CONFIG_NET_VENDOR_NETRONOME
548 # In function ‘memcpy’,
549 # inlined from ‘kszphy_get_strings’ at drivers/net/phy/micrel.c:664:3:
550 # ./include/linux/string.h:305:25: error: call to ‘__read_overflow2’ declared with attribute error: detected read beyond size of object passed as 2nd parameter
551 # 305 | __read_overflow2();
552 # | ^~~~~~~~~~~~~~~~~~
553 # make[3]: *** [scripts/Makefile.build:308: drivers/net/phy/micrel.o] Error 1
555 scripts
/config
--disable CONFIG_MICREL_PHY
558 # IGBVF won't build with recent gcc on 2.6.38.x
559 if { vergte
"$kversion" "2.6.37" && verlt
"$kversion" "2.6.38"; }; then
560 scripts
/config
--disable CONFIG_IGBVF
563 # Don't fail the build on warnings
564 scripts
/config
--disable CONFIG_WERROR
565 scripts
/config
--enable CONFIG_PPC_DISABLE_WERROR
567 # Set required options
568 scripts
/config
--enable CONFIG_TRACEPOINTS
569 scripts
/config
--enable CONFIG_KALLSYMS
570 scripts
/config
--enable CONFIG_HIGH_RES_TIMERS
571 scripts
/config
--enable CONFIG_KPROBES
572 scripts
/config
--enable CONFIG_FTRACE
573 scripts
/config
--enable CONFIG_BLK_DEV_IO_TRACE
574 scripts
/config
--enable CONFIG_KALLSYMS_ALL
575 scripts
/config
--enable CONFIG_HAVE_SYSCALL_TRACEPOINTS
576 scripts
/config
--enable CONFIG_PERF_EVENTS
577 scripts
/config
--enable CONFIG_EVENT_TRACING
578 scripts
/config
--enable CONFIG_KRETPROBES
580 if [ -n "${DEBUG}" ] ; then
584 make "$update_conf_target" "${make_args[@]}"
585 make -j"$NPROC" "${make_args[@]}"
587 krelease
=$
(make -s kernelrelease
"${make_args[@]}")
589 # Save the kernel and modules
590 mkdir
-p "$LINUX_INSTOBJ_DIR/boot"
591 make INSTALL_MOD_PATH
="$LINUX_INSTOBJ_DIR" INSTALL_MOD_STRIP
=1 modules_install
"${make_args[@]}"
592 make INSTALL_MOD_PATH
="$LINUX_INSTOBJ_DIR" INSTALL_PATH
="$LINUX_INSTOBJ_DIR/boot" install "${make_args[@]}"
593 rm -f "$LINUX_INSTOBJ_DIR/lib/modules/${krelease}/source" "$LINUX_INSTOBJ_DIR/lib/modules/${krelease}/build"
594 ln -s ..
/..
/..
/..
/sources
"$LINUX_INSTOBJ_DIR/lib/modules/${krelease}/source"
595 ln -s ..
/..
/..
/..
/sources
"$LINUX_INSTOBJ_DIR/lib/modules/${krelease}/source"
599 extract_distro_headers
() {
601 # Enter linux source dir
602 cd "${LINUX_SRCOBJ_DIR}"
605 # For RT kernels, copy version file
606 if [ -s localversion-rt
]; then
607 cp -a localversion-rt
"${LINUX_HDROBJ_DIR}"
610 # Copy all Makefile related stuff
611 find .
-path './include/*' -prune \
612 -o -path './scripts/*' -prune -o -type f \
613 \
( -name 'Makefile*' -o -name 'Kconfig*' -o -name 'Kbuild*' -o \
614 -name '*.sh' -o -name '*.pl' -o -name '*.lds' \
) \
615 -print |
cpio -pd --preserve-modification-time "${LINUX_HDROBJ_DIR}"
617 # Copy base scripts and include dirs
618 cp -a scripts include
"${LINUX_HDROBJ_DIR}"
621 (find arch
-name include
-type d
-print0 | \
622 xargs -0 -n1 -i: find : -type f
) | \
623 cpio -pd --preserve-modification-time "${LINUX_HDROBJ_DIR}"
626 (find arch
-name scripts
-type d
-print0 | \
627 xargs -0 -n1 -i: find : -type f
) | \
628 cpio -pd --preserve-modification-time "${LINUX_HDROBJ_DIR}"
631 rm -f "${LINUX_HDROBJ_DIR}/scripts/*.o"
632 rm -f "${LINUX_HDROBJ_DIR}/scripts/*/*.o"
634 # On powerpc 32bits this object is required to link modules
635 if [ "${karch}" = "powerpc" ]; then
636 if [ "x$(scripts/config -s CONFIG_PPC64)" = "xy" ] && vergte
"${kversion}" "5.4"; then
639 cp -a --parents arch
/powerpc
/lib
/crtsavres.
[So
] "${LINUX_HDROBJ_DIR}/"
643 # On arm64 between 4.13 and 1.15 this object is required to build with ftrace support
644 if [ "${karch}" = "arm64" ]; then
645 if [ -f "arch/arm64/kernel/ftrace-mod.S" ]; then
646 cp -a --parents arch
/arm64
/kernel
/ftrace-mod.
[So
] "${LINUX_HDROBJ_DIR}/"
650 # Newer kernels need objtool to build modules when CONFIG_STACK_VALIDATION=y
651 if [ -f tools
/objtool
/objtool
]; then
652 cp -a --parents tools
/objtool
/objtool
"${LINUX_HDROBJ_DIR}/"
655 if [ -f "arch/x86/kernel/macros.s" ]; then
656 cp -a --parents arch
/x86
/kernel
/macros.s
"${LINUX_HDROBJ_DIR}/"
659 # Copy modules related stuff, if available
660 if [ -s Module.symvers
]; then
661 cp Module.symvers
"${LINUX_HDROBJ_DIR}"
664 if [ -s System.map
]; then
665 cp System.map
"${LINUX_HDROBJ_DIR}"
668 if [ -s Module.markers
]; then
669 cp Module.markers
"${LINUX_HDROBJ_DIR}"
673 cp .config
"${LINUX_HDROBJ_DIR}"
675 # Make sure the Makefile and version.h have a matching timestamp so that
676 # external modules can be built
677 if [ -s "${LINUX_HDROBJ_DIR}/include/generated/uapi/linux/version.h" ]; then
678 touch -r "${LINUX_HDROBJ_DIR}/Makefile" "${LINUX_HDROBJ_DIR}/include/generated/uapi/linux/version.h"
679 elif [ -s "${LINUX_HDROBJ_DIR}/include/linux/version.h" ]; then
680 touch -r "${LINUX_HDROBJ_DIR}/Makefile" "${LINUX_HDROBJ_DIR}/include/linux/version.h"
682 echo "Missing version.h"
685 touch -r "${LINUX_HDROBJ_DIR}/.config" "${LINUX_HDROBJ_DIR}/include/generated/autoconf.h"
687 # Copy .config to include/config/auto.conf so "make prepare" is unnecessary.
688 if [ ! -f "${LINUX_HDROBJ_DIR}/include/config/auto.conf" ]; then
689 cp "${LINUX_HDROBJ_DIR}/.config" "${LINUX_HDROBJ_DIR}/include/config/auto.conf"
692 # Finally clean the object files from the full source tree
695 # And regen the modules support files
696 make modules_prepare
"${make_args[@]}"
698 # On powerpc 32bits this object is required to link modules
699 if [ "${karch}" = "powerpc" ]; then
700 if [ "x$(scripts/config -s CONFIG_PPC64)" = "xy" ] && vergte
"${kversion}" "5.4"; then
703 make arch
/powerpc
/lib
/crtsavres.o
"${make_args[@]}"
707 # On arm64 between 4.13 and 4.15 this object is required to build with ftrace support
708 if [ "${karch}" = "arm64" ]; then
709 if [ -f "arch/arm64/kernel/ftrace-mod.S" ]; then
710 make arch
/arm64
/kernel
/ftrace-mod.o
"${make_args[@]}"
714 # Version specific tasks
717 # Add Ubuntu ABI number to kernel headers, this is normally done by the packaging code
718 ABINUM
="$(echo "$ktag" | grep -P -o 'Ubuntu-(lts-)?.*-\K\d+(?=\..*)')"
719 echo "#define UTS_UBUNTU_RELEASE_ABI $ABINUM" >> include
/generated
/utsrelease.h
720 echo "#define UTS_UBUNTU_RELEASE_ABI $ABINUM" >> "${LINUX_HDROBJ_DIR}/include/generated/utsrelease.h"
732 kversion
=$
(make -C "$LINUX_HDROBJ_DIR" -s kernelversion
)
734 # Try to catch some compatibility problems by turning some
735 # warnings into errors.
736 #export KCFLAGS="$KCFLAGS -Wall -Werror"
738 # Enter lttng-modules source dir
739 cd "${MODULES_GIT_DIR}"
741 # kernels 3.10 to 3.10.13 and 3.11 to 3.11.2 introduce a deadlock in the
742 # timekeeping subsystem. We want those build to fail.
743 if { vergte
"$kversion" "3.10" && verlte
"$kversion" "3.10.13"; } || \
744 { vergte
"$kversion" "3.11" && verlte
"$kversion" "3.11.2"; }; then
749 KERNELDIR
="${kdir}" make -j"${NPROC}" V=1 "${make_args[@]}"
754 # We expect this build to fail, if it doesn't, fail the job.
755 if [ "$ret" -eq 0 ]; then
756 echo "This build should have failed."
760 # We have to publish at least one file or the build will fail
761 echo "This kernel is broken, there is a deadlock in the timekeeping subsystem." > "${outdir}/BROKEN.txt.ko"
763 KERNELDIR
="${kdir}" make clean
767 # Build modules against full kernel sources
768 KERNELDIR
="${kdir}" make -j"${NPROC}" V=1 "${make_args[@]}"
770 # Install modules to build dir
771 KERNELDIR
="${kdir}" make INSTALL_MOD_PATH
="${outdir}" modules_install
774 KERNELDIR
="${kdir}" make clean
784 MODULES_GIT_DIR
="${WORKSPACE}/src/lttng-modules"
785 LINUX_GIT_DIR
="${WORKSPACE}/src/linux"
787 LINUX_OBJ_DIR
="${WORKSPACE}/linux"
788 LINUX_SRCOBJ_DIR
="${LINUX_OBJ_DIR}/sources"
789 LINUX_HDROBJ_DIR
="${LINUX_OBJ_DIR}/headers"
790 LINUX_INSTOBJ_DIR
="${LINUX_OBJ_DIR}/install"
792 MODULES_OUTPUT_KSRC_DIR
="${WORKSPACE}/build/lttng-modules-ksrc"
793 MODULES_OUTPUT_KHDR_DIR
="${WORKSPACE}/build/lttng-modules-khdr"
795 LINUX_GIT_REF_REPO_DIR
="$HOME/gitcache/linux-stable.git/"
797 OBJ_STORE_URL
="s3://jenkins"
801 # Create build directories
802 mkdir
-p "${LINUX_SRCOBJ_DIR}" "${LINUX_HDROBJ_DIR}" "${LINUX_INSTOBJ_DIR}" "${MODULES_OUTPUT_KSRC_DIR}" "${MODULES_OUTPUT_KHDR_DIR}"
804 git_clone_modules_sources
806 # Setup cross compile env if available
807 if [ "x${cross_arch}" != "x" ]; then
809 case "$cross_arch" in
812 cross_compile
="arm-linux-gnueabihf-"
813 vanilla_config
="imx_v6_v7_defconfig"
814 ubuntu_config
="armhf-config.flavour.generic"
819 cross_compile
="aarch64-linux-gnu-"
820 vanilla_config
="defconfig"
821 ubuntu_config
="arm64-config.flavour.generic"
826 cross_compile
="powerpc-linux-gnu-"
827 vanilla_config
="ppc44x_defconfig"
828 ubuntu_config
="powerpc-config.flavour.powerpc-smp"
833 cross_compile
="powerpc64le-linux-gnu-"
834 vanilla_config
="pseries_le_defconfig"
835 ubuntu_config
="ppc64el-config.flavour.generic"
839 echo "Unsupported cross arch $cross_arch"
844 # Export variables used by Kbuild for cross compilation
845 export ARCH
="${karch}"
846 export CROSS_COMPILE
="${cross_compile}"
848 # Set arch specific values if we are not cross compiling
849 elif [ "x${arch}" != "x" ]; then
854 vanilla_config
="allmodconfig"
855 ubuntu_config
="i386-config.flavour.generic"
860 vanilla_config
="allmodconfig"
861 ubuntu_config
="amd64-config.flavour.generic"
866 vanilla_config
="allmodconfig"
867 ubuntu_config
="armhf-config.flavour.generic"
872 vanilla_config
="allmodconfig"
873 ubuntu_config
="arm64-config.flavour.generic"
878 vanilla_config
="allmodconfig"
879 ubuntu_config
="powerpc-config.flavour.powerpc-smp"
884 vanilla_config
="allmodconfig"
885 ubuntu_config
="ppc64el-config.flavour.generic"
889 echo "Unsupported arch $arch"
894 echo "No arch or cross_arch specified"
900 # First get the kernel build from the object store, or build it, if it's
903 echo "# Setup endpoint
904 host_base = obj.internal.efficios.com
905 host_bucket = obj.internal.efficios.com
906 bucket_location = us-east-1
911 secret_key = echo123456
913 # Enable S3 v4 signature APIs
914 signature_v2 = False" > "$WORKSPACE/.s3cfg"
916 url_hash
="$(echo -n "$kgitrepo" | md5sum | awk '{ print $1 }')"
917 obj_name
="linux.tar.bz2"
919 if [ "x${cross_arch}" = "x" ]; then
920 obj_url_prefix
="$OBJ_STORE_URL/linux-build/$url_hash/$ktag/platform-${platforms}/$arch/native"
922 obj_url_prefix
="$OBJ_STORE_URL/linux-build/$url_hash/$ktag/platform-${platforms}/${cross_arch}"
925 obj_url
="$obj_url_prefix/$obj_name"
928 # In s3cmd 2.3, the return code of get when an object does not exist (64)
929 # is different than in 2.2 (12). The return codes of 's3cmd info' are
930 # consistent between 2.2 and 2.3.
931 s3cmd
-c "$WORKSPACE/.s3cfg" info
"$obj_url"
937 s3cmd
-c "$WORKSPACE/.s3cfg" get
"$obj_url"
942 echo "File not found"
944 # Build all the things and upload
945 # then finish the module build...
947 git_clone_linux_sources
948 git_export_linux_sources
952 ## PREPARE FULL LINUX SOURCE TREE
955 ## EXTRACT DISTRO STYLE KERNEL HEADERS / DEVEL
956 extract_distro_headers
965 echo "Unknown error? Abort"
972 selected_cc_version
="$(echo "${selected_cc}" | cut -d'-' -f2)"
973 # lttng-modules requires gcc >= 5.1 for aarch64
974 # @see https://github.com/lttng/lttng-modules/commit/be06402dbdbea2f3394e60ec15c5d3356e2be416
975 if { verlt
"${selected_cc_version}" "5.1"; } && [ "${cross_arch}" = "arm64" ] ; then
976 echo "Building lltng-modules on aarch64 requires gcc >= 5.1"
981 # Either we downloaded a pre-build kernel or we built it and uploaded
982 # the archive for future builds.
986 # Build modules against full kernel sources
987 build_modules
"${LINUX_SRCOBJ_DIR}" "${MODULES_OUTPUT_KSRC_DIR}"
989 # Build modules against kernel headers
990 build_modules
"${LINUX_HDROBJ_DIR}" "${MODULES_OUTPUT_KHDR_DIR}"
992 # Make sure some modules were actually built
993 tree
"${MODULES_OUTPUT_KSRC_DIR}"
994 if [ "x$(find "${MODULES_OUTPUT_KSRC_DIR}" -name '*.ko*' -printf yes -quit)" != "xyes" ]; then
995 echo "No modules built!"
999 tree
"${MODULES_OUTPUT_KHDR_DIR}"
1000 if [ "x$(find "${MODULES_OUTPUT_KHDR_DIR}" -name '*.ko*' -printf yes -quit)" != "xyes" ]; then
1001 echo "No modules built!"