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Sean Christopherson 44b81136e8 kbuild: lto: Merge module sections if and only if CONFIG_LTO_CLANG is enabled 
commit 6a3193cdd5 upstream.

Merge module sections only when using Clang LTO. With ld.bfd, merging
sections does not appear to update the symbol tables for the module,
e.g. 'readelf -s' shows the value that a symbol would have had, if
sections were not merged. ld.lld does not show this problem.

The stale symbol table breaks gdb's function disassembler, and presumably
other things, e.g.

  gdb -batch -ex "file arch/x86/kvm/kvm.ko" -ex "disassemble kvm_init"

reads the wrong bytes and dumps garbage.

Fixes: dd2776222a ("kbuild: lto: merge module sections")
Cc: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Reviewed-by: Sami Tolvanen <samitolvanen@google.com>
Tested-by: Sami Tolvanen <samitolvanen@google.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20210322234438.502582-1-seanjc@google.com
Cc: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-02-23 12:01:00 +01:00
..
atomic
Merge branch 'kcsan' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu into locking/core
2020-10-09 08:56:02 +02:00
basic
kbuild: introduce hostprogs-always-y and userprogs-always-y
2020-08-10 01:32:59 +09:00
clang-tools
gen_compile_commands: fix missing 'sys' package
2021-09-22 12:27:58 +02:00
coccinelle
Merge branch 'for-5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/jlawall/linux
2020-10-18 14:20:35 -07:00
dtc
scripts/dtc: dtx_diff: remove broken example from help text
2022-01-27 10:54:35 +01:00
dummy-tools
kbuild: simplify GCC_PLUGINS enablement in dummy-tools/gcc
2021-12-14 11:32:46 +01:00
gcc-plugins
gcc-plugins: fix gcc 11 indigestion with plugins...
2021-12-14 11:32:33 +01:00
gdb
scripts/gdb/tasks: add headers and improve spacing format
2020-10-16 11:11:22 -07:00
genksyms
genksyms: keywords: Use __restrict not _restrict
2020-08-18 20:16:46 +09:00
kconfig
kconfig: nconf: stop endless search loops
2021-05-19 10:12:56 +02:00
ksymoops
…
mod
kbuild: generate Module.symvers only when vmlinux exists
2021-05-19 10:12:59 +02:00
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
scripts/tracing: fix the bug that can't parse raw_trace_func
2021-08-12 13:22:12 +02:00
.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
scripts: switch explicitly to Python 3
2021-05-22 11:40:55 +02:00
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 struct bpf_redir_neigh forward declaration to BPF helper defs
2020-10-29 15:19:04 +01:00
cc-can-link.sh
…
check_extable.sh
…
check-sysctl-docs
docs: add a script to check sysctl docs
2020-02-25 03:35:16 -07:00
checkincludes.pl
…
checkkconfigsymbols.py
kconfig: remove '---help---' support
2020-08-14 13:30:03 +09:00
checkpatch.pl
checkpatch: fix unescaped left brace
2020-12-30 11:53:56 +01:00
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
…
clang-version.sh
kbuild: update comment block of scripts/clang-version.sh
2019-03-04 22:34:54 +09:00
cleanfile
…
cleanpatch
…
coccicheck
scripts: coccicheck: Change default condition for parallelism
2020-10-12 10:37:56 +02:00
config
tweewide: Fix most Shebang lines
2021-05-22 11:40:55 +02:00
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
2021-01-12 20:18:16 +01:00
dev-needs.sh
scripts/dev-needs: Add script to list device dependencies
2020-09-04 18:19:37 +02:00
diffconfig
scripts: switch explicitly to Python 3
2021-05-22 11:40:55 +02:00
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_xc3028.pl
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 339
2019-06-05 17:37:07 +02:00
extract-cert.c
extract-cert: add static to local data
2020-08-18 20:16:46 +09:00
extract-ikconfig
…
extract-module-sig.pl
…
extract-sys-certs.pl
…
extract-vmlinux
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 378
2019-06-05 17:37:10 +02:00
faddr2line
scripts/faddr2line: fix location of start_kernel in comment
2018-11-18 10:15:09 -08:00
file-size.sh
…
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
…
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
…
gcc-x86_64-has-stack-protector.sh
…
gen_autoksyms.sh
kbuild: fix CONFIG_TRIM_UNUSED_KSYMS build for ppc64
2021-02-26 10:13:01 +01:00
gen_ksymdeps.sh
kbuild: Fix 'no symbols' warning when CONFIG_TRIM_UNUSD_KSYMS=y
2021-09-18 13:40:16 +02:00
get_abi.pl
tweewide: Fix most Shebang lines
2021-05-22 11:40:55 +02:00
get_dvb_firmware
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61
2019-05-24 17:36:45 +02:00
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
…
headers_check.pl
…
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
…
jobserver-exec
docs, parallelism: Rearrange how jobserver reservations are made
2019-11-22 10:35:18 -07:00
kallsyms.c
kallsyms: fix nonconverging kallsyms table with lld
2021-02-17 11:02:24 +01:00
Kbuild.include
kbuild: sink stdout from cmd for silent build
2021-07-25 14:36:12 +02:00
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
2020-12-30 11:53:33 +01:00
ld-version.sh
…
leaking_addresses.pl
leaking_addresses: Always print a trailing newline
2021-11-18 14:03:57 +01:00
Lindent
…
link-vmlinux.sh
Merge tag 'kbuild-v5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
2020-10-22 13:13:57 -07:00
lld-version.sh
scripts/lld-version.sh: Rewrite based on upstream ld-version.sh
2021-11-21 13:46:37 +01:00
Makefile
certs: Add ability to preload revocation certs
2021-06-30 08:47:30 -04:00
Makefile.asm-generic
kbuild: force all architectures except um to include mandatory-y
2019-03-17 12:56:32 +09:00
Makefile.build
kbuild: Fix objtool dependency for 'OBJECT_FILES_NON_STANDARD_<obj> := n'
2021-07-14 16:56:04 +02:00
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: Move -Wunaligned-access to W=1
2022-02-16 12:54:30 +01:00
Makefile.gcc-plugins
gcc-plugins/structleak: add makefile var for disabling structleak
2021-10-27 09:56:54 +02:00
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
kasan: fix hwasan build for gcc
2021-04-28 13:40:02 +02:00
Makefile.kcov
kbuild: include scripts/Makefile.* only when relevant CONFIG is enabled
2020-08-10 01:32:59 +09:00
Makefile.kcsan
Merge tag 'kbuild-v5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
2020-10-22 13:13:57 -07:00
Makefile.lib
dt-bindings: Use json for processed-schema*
2020-08-19 14:31:57 -06:00
Makefile.modfinal
kbuild: preprocess module linker script
2020-09-25 00:36:41 +09:00
Makefile.modinst
kbuild: modinst: read modules.order instead of $(MODVERDIR)/*.mod
2019-07-17 22:39:27 +09:00
Makefile.modpost
kbuild: generate Module.symvers only when vmlinux exists
2021-05-19 10:12:59 +02:00
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
Merge tag 'kbuild-v5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
2020-10-22 13:13:57 -07:00
Makefile.userprogs
kbuild: add infrastructure to build userspace programs
2020-05-17 18:52:01 +09:00
makelst
…
markup_oops.pl
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 373
2019-06-05 17:37:10 +02:00
mkcompile_h
kbuild: mkcompile_h: consider timestamp if KBUILD_BUILD_TIMESTAMP is set
2021-07-25 14:36:16 +02:00
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
…
module.lds.S
kbuild: lto: Merge module sections if and only if CONFIG_LTO_CLANG is enabled
2022-02-23 12:01:00 +01:00
modules-check.sh
kbuild: make module name conflict fatal error
2020-05-26 00:03:16 +09:00
nsdeps
scripts: add dummy report mode to add_namespace.cocci
2020-07-10 14:19:58 +02:00
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
…
profile2linkerlist.pl
…
prune-kernel
…
recordmcount.c
ftrace: Have recordmcount use w8 to read relp->r_info in arm64_is_fake_mcount
2021-03-09 11:11:14 +01:00
recordmcount.h
recordmcount: Correct st_shndx handling
2021-06-30 08:47:23 -04:00
recordmcount.pl
recordmcount.pl: fix typo in s390 mcount regex
2022-01-05 12:40:29 +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
2021-05-22 11:40:55 +02:00
sign-file.c
…
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
scripts: sphinx-pre-install: Fix ctex support on Debian
2022-01-27 10:54:36 +01:00
split-man.pl
tweewide: Fix most Shebang lines
2021-05-22 11:40:55 +02:00
stackdelta
…
stackusage
…
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
Makefile: fix GDB warning with CONFIG_RELR
2021-07-14 16:55:53 +02:00
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
…
xz_wrap.sh
kbuild: add variables for compression tools
2020-06-06 23:42:01 +09:00