forked from luck/tmp_suning_uos_patched
bb2732112b
Move CFLAGS_KASAN*, CFLAGS_UBSAN, CFLAGS_KCSAN to Makefile.kasan, Makefile.ubsan, Makefile.kcsan, respectively. This commit also avoids the same -fsanitize=* flags being added to CFLAGS_UBSAN multiple times. Prior to this commit, the ubsan flags were appended by the '+=' operator, without any initialization. Some build targets such as 'make bindeb-pkg' recurses to the top Makefile, and ended up with adding the same flags to CFLAGS_UBSAN twice. Clear CFLAGS_UBSAN with ':=' to make it a simply expanded variable. This is better than a recursively expanded variable, which evaluates $(call cc-option, ...) multiple times before Kbuild starts descending to subdirectories. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Acked-by: Marco Elver <elver@google.com>
52 lines
1.5 KiB
Makefile
52 lines
1.5 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
|
|
CFLAGS_KASAN_NOSANITIZE := -fno-builtin
|
|
KASAN_SHADOW_OFFSET ?= $(CONFIG_KASAN_SHADOW_OFFSET)
|
|
|
|
ifdef CONFIG_KASAN_GENERIC
|
|
|
|
ifdef CONFIG_KASAN_INLINE
|
|
call_threshold := 10000
|
|
else
|
|
call_threshold := 0
|
|
endif
|
|
|
|
CFLAGS_KASAN_MINIMAL := -fsanitize=kernel-address
|
|
|
|
cc-param = $(call cc-option, -mllvm -$(1), $(call cc-option, --param $(1)))
|
|
|
|
# -fasan-shadow-offset fails without -fsanitize
|
|
CFLAGS_KASAN_SHADOW := $(call cc-option, -fsanitize=kernel-address \
|
|
-fasan-shadow-offset=$(KASAN_SHADOW_OFFSET), \
|
|
$(call cc-option, -fsanitize=kernel-address \
|
|
-mllvm -asan-mapping-offset=$(KASAN_SHADOW_OFFSET)))
|
|
|
|
ifeq ($(strip $(CFLAGS_KASAN_SHADOW)),)
|
|
CFLAGS_KASAN := $(CFLAGS_KASAN_MINIMAL)
|
|
else
|
|
# Now add all the compiler specific options that are valid standalone
|
|
CFLAGS_KASAN := $(CFLAGS_KASAN_SHADOW) \
|
|
$(call cc-param,asan-globals=1) \
|
|
$(call cc-param,asan-instrumentation-with-call-threshold=$(call_threshold)) \
|
|
$(call cc-param,asan-stack=$(CONFIG_KASAN_STACK)) \
|
|
$(call cc-param,asan-instrument-allocas=1)
|
|
endif
|
|
|
|
endif # CONFIG_KASAN_GENERIC
|
|
|
|
ifdef CONFIG_KASAN_SW_TAGS
|
|
|
|
ifdef CONFIG_KASAN_INLINE
|
|
instrumentation_flags := -mllvm -hwasan-mapping-offset=$(KASAN_SHADOW_OFFSET)
|
|
else
|
|
instrumentation_flags := -mllvm -hwasan-instrument-with-calls=1
|
|
endif
|
|
|
|
CFLAGS_KASAN := -fsanitize=kernel-hwaddress \
|
|
-mllvm -hwasan-instrument-stack=$(CONFIG_KASAN_STACK) \
|
|
-mllvm -hwasan-use-short-granules=0 \
|
|
$(instrumentation_flags)
|
|
|
|
endif # CONFIG_KASAN_SW_TAGS
|
|
|
|
export CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE
|