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Sami Tolvanen fbe078d397 kbuild: lto: add a default list of used symbols
With CONFIG_LTO_CLANG, LLVM bitcode has not yet been compiled into a
binary when the .mod files are generated, which means they don't yet
contain references to certain symbols that will be present in the final
binaries. This includes intrinsic functions, such as memcpy, memmove,
and memset [1], and stack protector symbols [2]. This change adds a
default symbol list to use with CONFIG_TRIM_UNUSED_KSYMS when Clang's
LTO is used.

[1] https://llvm.org/docs/LangRef.html#standard-c-c-library-intrinsics
[2] https://llvm.org/docs/LangRef.html#llvm-stackprotector-intrinsic

Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20201211184633.3213045-7-samitolvanen@google.com
2021-01-14 08:21:09 -08:00
..
atomic locking/atomics: Regenerate the atomics-check SHA1's 2020-11-07 13:20:41 +01:00
basic kbuild: introduce hostprogs-always-y and userprogs-always-y 2020-08-10 01:32:59 +09:00
clang-tools Makefile: Add clang-tidy and static analyzer support to makefile 2020-08-27 00:44:33 +09:00
coccinelle coccinnelle: Remove ptr_ret script 2020-12-15 20:55:19 +01:00
dtc scripts/dtc: Update to upstream version v1.6.0-31-gcbca977ea121 2020-10-12 09:58:15 -05:00
dummy-tools kbuild: add dummy toolchains to enable all cc-option etc. in Kconfig 2020-04-09 00:13:45 +09:00
gcc-plugins gcc-plugins: simplify GCC plugin-dev capability test 2020-12-04 14:09:55 -08:00
gdb scripts/gdb/tasks: add headers and improve spacing format 2020-10-16 11:11:22 -07:00
genksyms genksyms: Ignore module scoped _Static_assert() 2020-12-21 13:57:08 +09:00
kconfig kconfig: fix return value of do_error_if() 2020-12-21 14:48:54 +09:00
ksymoops Fix dead URLs to ftp.kernel.org 2017-03-28 16:16:52 +02:00
mod Kbuild updates for v5.11 2020-12-22 14:02:39 -08:00
package builddeb: Fix rootless build in setuid/setgid directory 2020-11-02 11:31:00 +09:00
selinux scripts/selinux,selinux: update mdp to enable policy capabilities 2020-08-17 20:42:00 -04:00
tracing tweewide: Fix most Shebang lines 2020-12-08 23:30:04 +09:00
.gitignore kbuild: preprocess module linker script 2020-09-25 00:36:41 +09:00
adjust_autoksyms.sh kbuild: split adjust_autoksyms.sh in two parts 2020-03-03 20:49:21 +09:00
asn1_compiler.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 36 2019-05-24 17:27:11 +02:00
bin2c.c kbuild: move bin2c back to scripts/ from scripts/basic/ 2018-07-18 01:18:05 +09:00
bloat-o-meter tweewide: Fix most Shebang lines 2020-12-08 23:30:04 +09:00
bootgraph.pl treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 391 2019-06-05 17:37:11 +02:00
bpf_helpers_doc.py bpf: Add a bpf_sock_from_file helper 2020-12-04 22:32:40 +01:00
cc-can-link.sh bpfilter: check compiler capability in Kconfig 2018-06-28 13:36:39 +09:00
check-sysctl-docs docs: add a script to check sysctl docs 2020-02-25 03:35:16 -07:00
check_extable.sh License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
checkincludes.pl License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
checkkconfigsymbols.py kconfig: remove '---help---' support 2020-08-14 13:30:03 +09:00
checkpatch.pl checkpatch: prefer strscpy to strlcpy 2020-12-29 15:36:49 -08:00
checkstack.pl scripts/checkstack.pl: fix arm sp regex 2020-05-26 00:03:16 +09:00
checksyscalls.sh checksyscalls: fix up mq_timedreceive and stat exceptions 2019-02-19 21:27:53 +01:00
checkversion.pl License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
clang-version.sh kbuild: update comment block of scripts/clang-version.sh 2019-03-04 22:34:54 +09:00
cleanfile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
cleanpatch License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
coccicheck scripts: coccicheck: Correct usage of make coccicheck 2020-12-24 12:59:43 +01:00
config tweewide: Fix most Shebang lines 2020-12-08 23:30:04 +09:00
const_structs.checkpatch const_structs.checkpatch: add pinctrl_ops and pinmux_ops 2020-10-16 11:11:21 -07:00
decode_stacktrace.sh scripts/decode_stacktrace.sh: guess path to vmlinux by release name 2020-08-07 11:33:21 -07:00
decodecode scripts/decodecode: add the capability to supply the program counter 2020-10-13 18:38:26 -07:00
depmod.sh depmod: handle the case of /sbin/depmod without /sbin in PATH 2021-01-01 12:26:39 -08:00
dev-needs.sh scripts/dev-needs: Add script to list device dependencies 2020-09-04 18:19:37 +02:00
diffconfig tweewide: Fix most Shebang lines 2020-12-08 23:30:04 +09:00
documentation-file-ref-check scripts: documentation-file-ref-check: Add line break before exit 2020-04-15 15:13:13 -06:00
export_report.pl modpost: move the namespace field in Module.symvers last 2020-03-17 08:59:03 +09:00
extract-cert.c extract-cert: add static to local data 2020-08-18 20:16:46 +09:00
extract-ikconfig
extract-module-sig.pl License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
extract-sys-certs.pl License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
extract-vmlinux treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 378 2019-06-05 17:37:10 +02:00
extract_xc3028.pl treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 339 2019-06-05 17:37:07 +02:00
faddr2line scripts/faddr2line: fix location of start_kernel in comment 2018-11-18 10:15:09 -08:00
file-size.sh kbuild: Use ls(1) instead of stat(1) to obtain file size 2018-03-26 02:01:24 +09:00
find-unused-docs.sh scripts/find-unused-docs: Fix massive false positives 2020-01-27 14:25:06 -07:00
gcc-goto.sh jump_label: move 'asm goto' support test to Kconfig 2019-01-06 09:46:51 +09:00
gcc-ld License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
gcc-version.sh kbuild: clean up scripts/gcc-version.sh 2019-03-04 22:35:04 +09:00
gcc-x86_32-has-stack-protector.sh stack-protector: test compiler capability in Kconfig and drop AUTO mode 2018-06-08 18:56:00 +09:00
gcc-x86_64-has-stack-protector.sh stack-protector: Fix test with 32-bit userland and CONFIG_64BIT=y 2018-06-25 23:21:13 +09:00
gen_autoksyms.sh kbuild: generate autoksyms.h early 2020-03-03 20:49:21 +09:00
gen_ksymdeps.sh kbuild: simplify dependency generation for CONFIG_TRIM_UNUSED_KSYMS 2018-12-01 23:13:14 +09:00
get_abi.pl tweewide: Fix most Shebang lines 2020-12-08 23:30:04 +09:00
get_dvb_firmware treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61 2019-05-24 17:36:45 +02:00
get_feat.pl scripts: get_feat.pl: reduce table width for all features output 2020-12-04 14:34:27 -07:00
get_maintainer.pl get_maintainer: exclude MAINTAINERS file(s) from --git-fallback 2020-10-16 11:11:19 -07:00
gfp-translate treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 166 2019-05-30 11:26:39 -07:00
headerdep.pl License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
headers_check.pl License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
headers_install.sh Merge branch 'work.fdpic' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2020-08-07 13:29:39 -07:00
insert-sys-cert.c KEYS: Reserve an extra certificate symbol for inserting without recompiling 2016-02-26 15:30:20 +00:00
jobserver-exec docs, parallelism: Rearrange how jobserver reservations are made 2019-11-22 10:35:18 -07:00
kallsyms.c scripts/kallsyms: skip ppc compiler stub *.long_branch.* / *.plt_branch.* 2020-09-25 00:41:54 +09:00
Kbuild.include kbuild: remove leftover comment for filechk utility 2020-10-21 00:28:53 +09:00
Kconfig.include kconfig: unify cc-option and as-option 2020-06-17 10:38:42 +09:00
kernel-doc scripts: kernel-doc: fix parsing function-like typedefs 2020-12-03 15:56:14 -07:00
ld-version.sh License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
leaking_addresses.pl treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 166 2019-05-30 11:26:39 -07:00
Lindent License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
link-vmlinux.sh kbuild: lto: fix module versioning 2021-01-14 08:21:08 -08:00
lld-version.sh kbuild: Disable CONFIG_LD_ORPHAN_WARN for ld.lld 10.0.1 2020-12-01 22:46:06 +09:00
lto-used-symbollist.txt kbuild: lto: add a default list of used symbols 2021-01-14 08:21:09 -08:00
Makefile kbuild: preprocess module linker script 2020-09-25 00:36:41 +09:00
Makefile.asm-generic kbuild: force all architectures except um to include mandatory-y 2019-03-17 12:56:32 +09:00
Makefile.build kbuild: lto: fix module versioning 2021-01-14 08:21:08 -08:00
Makefile.clean kbuild: introduce hostprogs-always-y and userprogs-always-y 2020-08-10 01:32:59 +09:00
Makefile.dtbinst kbuild: refactor Makefile.dtbinst more 2020-03-25 10:19:43 +09:00
Makefile.extrawarn Makefile.extrawarn: remove -Wnested-externs warning 2020-12-08 23:30:05 +09:00
Makefile.gcc-plugins gcc-plugins/stackleak: Use asm instrumentation to avoid useless register saving 2020-06-24 07:48:28 -07:00
Makefile.headersinst kbuild: move headers_check rule to usr/include/Makefile 2019-11-15 00:23:10 +09:00
Makefile.host kbuild: sort hostprogs before passing it to ifneq 2020-08-10 01:32:59 +09:00
Makefile.kasan kbuild: move CFLAGS_{KASAN,UBSAN,KCSAN} exports to relevant Makefiles 2020-09-25 00:36:50 +09:00
Makefile.kcov kbuild: include scripts/Makefile.* only when relevant CONFIG is enabled 2020-08-10 01:32:59 +09:00
Makefile.kcsan Kbuild updates for v5.10 2020-10-22 13:13:57 -07:00
Makefile.lib kasan, arm64: expand CONFIG_KASAN checks 2020-12-22 12:55:08 -08:00
Makefile.modfinal kbuild: add support for Clang LTO 2021-01-14 08:21:08 -08:00
Makefile.modinst kbuild: modinst: read modules.order instead of $(MODVERDIR)/*.mod 2019-07-17 22:39:27 +09:00
Makefile.modpost kbuild: lto: fix module versioning 2021-01-14 08:21:08 -08:00
Makefile.modsign kbuild: modsign: read modules.order instead of $(MODVERDIR)/*.mod 2019-07-17 22:39:27 +09:00
Makefile.package kbuild: fix broken builds because of GZIP,BZIP2,LZOP variables 2020-06-11 20:14:41 +09:00
Makefile.ubsan ubsan: move cc-option tests into Kconfig 2020-12-15 22:46:18 -08:00
Makefile.userprogs kbuild: add infrastructure to build userspace programs 2020-05-17 18:52:01 +09:00
makelst License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
markup_oops.pl treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 373 2019-06-05 17:37:10 +02:00
mkcompile_h kbuild: Use uname for LINUX_COMPILE_HOST detection 2020-10-21 00:46:04 +09:00
mkmakefile kbuild: get rid of $(realpath ...) from scripts/mkmakefile 2019-08-29 23:54:29 +09:00
mksysmap mksysmap: Fix the mismatch of '.L' symbols in System.map 2020-06-06 23:39:20 +09:00
mkuboot.sh License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
module.lds.S kbuild: lto: merge module sections 2021-01-14 08:21:08 -08:00
modules-check.sh kbuild: make module name conflict fatal error 2020-05-26 00:03:16 +09:00
nsdeps kbuild: do not use scripts/ld-version.sh for checking spatch version 2020-12-12 18:31:29 +01:00
objdiff treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 199 2019-05-30 11:29:23 -07:00
parse-maintainers.pl parse-maintainers: Do not sort section content by default 2020-03-26 15:08:27 -07:00
patch-kernel License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
profile2linkerlist.pl License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
prune-kernel License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
recordmcount.c recordmcount: Fix build failure on non arm64 2020-08-10 15:22:06 +01:00
recordmcount.h recordmcount: support >64k sections 2020-06-16 21:21:00 -04:00
recordmcount.pl s390/ftrace: assume -mhotpatch or -mrecord-mcount always available 2020-11-20 19:19:11 +01:00
setlocalversion scripts/setlocalversion: make git describe output more reliable 2020-09-25 02:28:12 +09:00
show_delta tweewide: Fix most Shebang lines 2020-12-08 23:30:04 +09:00
sign-file.c sign-file: fix build error in sign-file.c with libressl 2017-02-10 12:43:47 +11:00
sorttable.c s390/kernel: expand exception table logic to allow new handling options 2020-07-20 10:55:50 +02:00
sorttable.h scripts/sorttable: Implement build-time ORC unwind table sorting 2019-12-13 10:47:58 +01:00
spdxcheck-test.sh scripts: add spdxcheck.py self test 2018-12-28 12:11:44 -08:00
spdxcheck.py scripts/spdxcheck.py: handle license identifiers in XML comments 2020-10-02 11:31:26 +02:00
spelling.txt Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2020-10-15 15:11:56 -07:00
sphinx-pre-install tweewide: Fix most Shebang lines 2020-12-08 23:30:04 +09:00
split-man.pl tweewide: Fix most Shebang lines 2020-12-08 23:30:04 +09:00
stackdelta License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
stackusage License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
subarch.include selftests: add headers_install to lib.mk 2018-09-05 08:12:09 -06:00
tags.sh Merge branch 'locking/urgent' into locking/core, to pick up fixes 2020-10-09 08:55:17 +02:00
tools-support-relr.sh scripts/tools-support-relr.sh: un-quote variables 2019-11-13 10:52:05 +00:00
unifdef.c unifdef: use memcpy instead of strncpy 2018-11-30 14:45:01 -08:00
ver_linux ver_linux: Query ld cache for versions of libc/libcpp run-time 2020-02-10 13:35:15 -08:00
xen-hypercalls.sh License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
xz_wrap.sh kbuild: add variables for compression tools 2020-06-06 23:42:01 +09:00