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authorLinus Torvalds <torvalds@linux-foundation.org>2021-05-28 08:31:48 -1000
committerLinus Torvalds <torvalds@linux-foundation.org>2021-05-28 08:31:48 -1000
commit8508b97ae2b6c73c2c09798c9fa9d27ec57ff1dc (patch)
treea5dcf52347b95a669857c9b66d51ddeed8a3783e /Makefile
parentafdd14704d7eb4d7634cb7ba8d117066fed44282 (diff)
parent24845dcb170e16b3100bd49743687648c71387ae (diff)
downloadlinux-8508b97ae2b6c73c2c09798c9fa9d27ec57ff1dc.tar.bz2
Merge tag 'clang-features-v5.13-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
Pull clang feature fixes from Kees Cook: - Correctly pass stack frame size checking under LTO (Nick Desaulniers) - Avoid CFI mismatches by checking initcall_t types (Marco Elver) * tag 'clang-features-v5.13-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux: Makefile: LTO: have linker check -Wframe-larger-than init: verify that function is initcall_t at compile-time
Diffstat (limited to 'Makefile')
-rw-r--r--Makefile5
1 files changed, 5 insertions, 0 deletions
diff --git a/Makefile b/Makefile
index e4468353425a..82ef373caf4d 100644
--- a/Makefile
+++ b/Makefile
@@ -928,6 +928,11 @@ CC_FLAGS_LTO += -fvisibility=hidden
# Limit inlining across translation units to reduce binary size
KBUILD_LDFLAGS += -mllvm -import-instr-limit=5
+
+# Check for frame size exceeding threshold during prolog/epilog insertion.
+ifneq ($(CONFIG_FRAME_WARN),0)
+KBUILD_LDFLAGS += -plugin-opt=-warn-stack-size=$(CONFIG_FRAME_WARN)
+endif
endif
ifdef CONFIG_LTO