Commit | Line | Data |
---|---|---|
b2441318 | 1 | # SPDX-License-Identifier: GPL-2.0 |
34b5560d MR |
2 | ifdef CONFIG_KASAN |
3 | CFLAGS_KASAN_NOSANITIZE := -fno-builtin | |
4 | KASAN_SHADOW_OFFSET ?= $(CONFIG_KASAN_SHADOW_OFFSET) | |
5 | endif | |
6 | ||
2bd926b4 AK |
7 | ifdef CONFIG_KASAN_GENERIC |
8 | ||
0b24becc AR |
9 | ifdef CONFIG_KASAN_INLINE |
10 | call_threshold := 10000 | |
11 | else | |
12 | call_threshold := 0 | |
13 | endif | |
14 | ||
15 | CFLAGS_KASAN_MINIMAL := -fsanitize=kernel-address | |
16 | ||
1a69e7ce | 17 | cc-param = $(call cc-option, -mllvm -$(1), $(call cc-option, --param $(1))) |
0b24becc | 18 | |
2bd926b4 AK |
19 | # -fasan-shadow-offset fails without -fsanitize |
20 | CFLAGS_KASAN_SHADOW := $(call cc-option, -fsanitize=kernel-address \ | |
1a69e7ce AR |
21 | -fasan-shadow-offset=$(KASAN_SHADOW_OFFSET), \ |
22 | $(call cc-option, -fsanitize=kernel-address \ | |
23 | -mllvm -asan-mapping-offset=$(KASAN_SHADOW_OFFSET))) | |
24 | ||
2bd926b4 AK |
25 | ifeq ($(strip $(CFLAGS_KASAN_SHADOW)),) |
26 | CFLAGS_KASAN := $(CFLAGS_KASAN_MINIMAL) | |
27 | else | |
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)) \ | |
6baec880 | 32 | $(call cc-param,asan-stack=$(CONFIG_KASAN_STACK)) \ |
2bd926b4 | 33 | $(call cc-param,asan-instrument-allocas=1) |
0b24becc | 34 | endif |
c5caf21a | 35 | |
2bd926b4 | 36 | endif # CONFIG_KASAN_GENERIC |
0e410e15 | 37 | |
2bd926b4 AK |
38 | ifdef CONFIG_KASAN_SW_TAGS |
39 | ||
40 | ifdef CONFIG_KASAN_INLINE | |
41 | instrumentation_flags := -mllvm -hwasan-mapping-offset=$(KASAN_SHADOW_OFFSET) | |
42 | else | |
43 | instrumentation_flags := -mllvm -hwasan-instrument-with-calls=1 | |
44 | endif | |
45 | ||
46 | CFLAGS_KASAN := -fsanitize=kernel-hwaddress \ | |
47 | -mllvm -hwasan-instrument-stack=0 \ | |
48 | $(instrumentation_flags) | |
49 | ||
50 | endif # CONFIG_KASAN_SW_TAGS |