Commit | Line | Data |
---|---|---|
b2441318 | 1 | # SPDX-License-Identifier: GPL-2.0 |
2bd926b4 AK |
2 | ifdef CONFIG_KASAN_GENERIC |
3 | ||
0b24becc AR |
4 | ifdef CONFIG_KASAN_INLINE |
5 | call_threshold := 10000 | |
6 | else | |
7 | call_threshold := 0 | |
8 | endif | |
9 | ||
39d114dd AR |
10 | KASAN_SHADOW_OFFSET ?= $(CONFIG_KASAN_SHADOW_OFFSET) |
11 | ||
0b24becc AR |
12 | CFLAGS_KASAN_MINIMAL := -fsanitize=kernel-address |
13 | ||
1a69e7ce | 14 | cc-param = $(call cc-option, -mllvm -$(1), $(call cc-option, --param $(1))) |
0b24becc | 15 | |
2bd926b4 AK |
16 | # -fasan-shadow-offset fails without -fsanitize |
17 | CFLAGS_KASAN_SHADOW := $(call cc-option, -fsanitize=kernel-address \ | |
1a69e7ce AR |
18 | -fasan-shadow-offset=$(KASAN_SHADOW_OFFSET), \ |
19 | $(call cc-option, -fsanitize=kernel-address \ | |
20 | -mllvm -asan-mapping-offset=$(KASAN_SHADOW_OFFSET))) | |
21 | ||
2bd926b4 AK |
22 | ifeq ($(strip $(CFLAGS_KASAN_SHADOW)),) |
23 | CFLAGS_KASAN := $(CFLAGS_KASAN_MINIMAL) | |
24 | else | |
25 | # Now add all the compiler specific options that are valid standalone | |
26 | CFLAGS_KASAN := $(CFLAGS_KASAN_SHADOW) \ | |
27 | $(call cc-param,asan-globals=1) \ | |
28 | $(call cc-param,asan-instrumentation-with-call-threshold=$(call_threshold)) \ | |
29 | $(call cc-param,asan-stack=1) \ | |
30 | $(call cc-param,asan-use-after-scope=1) \ | |
31 | $(call cc-param,asan-instrument-allocas=1) | |
0b24becc | 32 | endif |
c5caf21a | 33 | |
e7c52b84 | 34 | ifdef CONFIG_KASAN_EXTRA |
c5caf21a | 35 | CFLAGS_KASAN += $(call cc-option, -fsanitize-address-use-after-scope) |
e7c52b84 | 36 | endif |
0e410e15 | 37 | |
2bd926b4 | 38 | endif # CONFIG_KASAN_GENERIC |
0e410e15 | 39 | |
2bd926b4 AK |
40 | ifdef CONFIG_KASAN_SW_TAGS |
41 | ||
42 | ifdef CONFIG_KASAN_INLINE | |
43 | instrumentation_flags := -mllvm -hwasan-mapping-offset=$(KASAN_SHADOW_OFFSET) | |
44 | else | |
45 | instrumentation_flags := -mllvm -hwasan-instrument-with-calls=1 | |
46 | endif | |
47 | ||
48 | CFLAGS_KASAN := -fsanitize=kernel-hwaddress \ | |
49 | -mllvm -hwasan-instrument-stack=0 \ | |
50 | $(instrumentation_flags) | |
51 | ||
52 | endif # CONFIG_KASAN_SW_TAGS | |
53 | ||
54 | ifdef CONFIG_KASAN | |
55 | CFLAGS_KASAN_NOSANITIZE := -fno-builtin | |
0b24becc | 56 | endif |