diff options
Diffstat (limited to 'scripts')
| -rw-r--r-- | scripts/Makefile.kasan | 24 | ||||
| -rw-r--r-- | scripts/Makefile.lib | 10 |
2 files changed, 34 insertions, 0 deletions
diff --git a/scripts/Makefile.kasan b/scripts/Makefile.kasan new file mode 100644 index 000000000000..7acd6faa0335 --- /dev/null +++ b/scripts/Makefile.kasan @@ -0,0 +1,24 @@ +ifdef CONFIG_KASAN +ifdef CONFIG_KASAN_INLINE + call_threshold := 10000 +else + call_threshold := 0 +endif + +CFLAGS_KASAN_MINIMAL := -fsanitize=kernel-address + +CFLAGS_KASAN := $(call cc-option, -fsanitize=kernel-address \ + -fasan-shadow-offset=$(CONFIG_KASAN_SHADOW_OFFSET) \ + --param asan-instrumentation-with-call-threshold=$(call_threshold)) + +ifeq ($(call cc-option, $(CFLAGS_KASAN_MINIMAL) -Werror),) + $(warning Cannot use CONFIG_KASAN: \ + -fsanitize=kernel-address is not supported by compiler) +else + ifeq ($(CFLAGS_KASAN),) + $(warning CONFIG_KASAN: compiler does not support all options.\ + Trying minimal configuration) + CFLAGS_KASAN := $(CFLAGS_KASAN_MINIMAL) + endif +endif +endif diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib index 511755200634..044eb4f89a91 100644 --- a/scripts/Makefile.lib +++ b/scripts/Makefile.lib @@ -119,6 +119,16 @@ _c_flags += $(if $(patsubst n%,, \ $(CFLAGS_GCOV)) endif +# +# Enable address sanitizer flags for kernel except some files or directories +# we don't want to check (depends on variables KASAN_SANITIZE_obj.o, KASAN_SANITIZE) +# +ifeq ($(CONFIG_KASAN),y) +_c_flags += $(if $(patsubst n%,, \ + $(KASAN_SANITIZE_$(basetarget).o)$(KASAN_SANITIZE)y), \ + $(CFLAGS_KASAN)) +endif + # If building the kernel in a separate objtree expand all occurrences # of -Idir to -I$(srctree)/dir except for absolute paths (starting with '/'). |