1# SPDX-License-Identifier: GPL-2.0
 2ifdef CONFIG_KASAN
 
 
 
 
 
 
 3ifdef CONFIG_KASAN_INLINE
 4	call_threshold := 10000
 5else
 6	call_threshold := 0
 7endif
 8
 9KASAN_SHADOW_OFFSET ?= $(CONFIG_KASAN_SHADOW_OFFSET)
10
11CFLAGS_KASAN_MINIMAL := -fsanitize=kernel-address
12
13cc-param = $(call cc-option, -mllvm -$(1), $(call cc-option, --param $(1)))
14
15ifeq ($(call cc-option, $(CFLAGS_KASAN_MINIMAL) -Werror),)
16   ifneq ($(CONFIG_COMPILE_TEST),y)
17        $(warning Cannot use CONFIG_KASAN: \
18            -fsanitize=kernel-address is not supported by compiler)
19   endif
20else
21   # -fasan-shadow-offset fails without -fsanitize
22   CFLAGS_KASAN_SHADOW := $(call cc-option, -fsanitize=kernel-address \
23			-fasan-shadow-offset=$(KASAN_SHADOW_OFFSET), \
24			$(call cc-option, -fsanitize=kernel-address \
25			-mllvm -asan-mapping-offset=$(KASAN_SHADOW_OFFSET)))
26
27   ifeq ($(strip $(CFLAGS_KASAN_SHADOW)),)
28      CFLAGS_KASAN := $(CFLAGS_KASAN_MINIMAL)
29   else
30      # Now add all the compiler specific options that are valid standalone
31      CFLAGS_KASAN := $(CFLAGS_KASAN_SHADOW) \
32	$(call cc-param,asan-globals=1) \
33	$(call cc-param,asan-instrumentation-with-call-threshold=$(call_threshold)) \
34	$(call cc-param,asan-stack=1) \
35	$(call cc-param,asan-use-after-scope=1) \
36	$(call cc-param,asan-instrument-allocas=1)
37   endif
38
39endif
40
41ifdef CONFIG_KASAN_EXTRA
42CFLAGS_KASAN += $(call cc-option, -fsanitize-address-use-after-scope)
43endif
44
45CFLAGS_KASAN_NOSANITIZE := -fno-builtin
46
 
 
 
 
47endif

 1# SPDX-License-Identifier: GPL-2.0
 2ifdef CONFIG_KASAN
 3CFLAGS_KASAN_NOSANITIZE := -fno-builtin
 4KASAN_SHADOW_OFFSET ?= $(CONFIG_KASAN_SHADOW_OFFSET)
 5endif
 6
 7ifdef CONFIG_KASAN_GENERIC
 8
 9ifdef CONFIG_KASAN_INLINE
10	call_threshold := 10000
11else
12	call_threshold := 0
13endif
14
 
 
15CFLAGS_KASAN_MINIMAL := -fsanitize=kernel-address
16
17cc-param = $(call cc-option, -mllvm -$(1), $(call cc-option, --param $(1)))
18
19# -fasan-shadow-offset fails without -fsanitize
20CFLAGS_KASAN_SHADOW := $(call cc-option, -fsanitize=kernel-address \
 
 
 
 
 
 
21			-fasan-shadow-offset=$(KASAN_SHADOW_OFFSET), \
22			$(call cc-option, -fsanitize=kernel-address \
23			-mllvm -asan-mapping-offset=$(KASAN_SHADOW_OFFSET)))
24
25ifeq ($(strip $(CFLAGS_KASAN_SHADOW)),)
26	CFLAGS_KASAN := $(CFLAGS_KASAN_MINIMAL)
27else
28	# Now add all the compiler specific options that are valid standalone
29	CFLAGS_KASAN := $(CFLAGS_KASAN_SHADOW) \
30	 $(call cc-param,asan-globals=1) \
31	 $(call cc-param,asan-instrumentation-with-call-threshold=$(call_threshold)) \
32	 $(call cc-param,asan-stack=$(CONFIG_KASAN_STACK)) \
33	 $(call cc-param,asan-instrument-allocas=1)
 
 
 
34endif
35
36endif # CONFIG_KASAN_GENERIC
 
 
37
38ifdef CONFIG_KASAN_SW_TAGS
39
40ifdef CONFIG_KASAN_INLINE
41    instrumentation_flags := -mllvm -hwasan-mapping-offset=$(KASAN_SHADOW_OFFSET)
42else
43    instrumentation_flags := -mllvm -hwasan-instrument-with-calls=1
44endif
45
46CFLAGS_KASAN := -fsanitize=kernel-hwaddress \
47		-mllvm -hwasan-instrument-stack=$(CONFIG_KASAN_STACK) \
48		-mllvm -hwasan-use-short-granules=0 \
49		$(instrumentation_flags)
50
51endif # CONFIG_KASAN_SW_TAGS