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1 | # SPDX-License-Identifier: GPL-2.0 | |
2 | ifdef CONFIG_KASAN | |
3 | ifdef CONFIG_KASAN_INLINE | |
4 | call_threshold := 10000 | |
5 | else | |
6 | call_threshold := 0 | |
7 | endif | |
8 | ||
9 | KASAN_SHADOW_OFFSET ?= $(CONFIG_KASAN_SHADOW_OFFSET) | |
10 | ||
11 | CFLAGS_KASAN_MINIMAL := -fsanitize=kernel-address | |
12 | ||
13 | CFLAGS_KASAN := $(call cc-option, -fsanitize=kernel-address \ | |
14 | -fasan-shadow-offset=$(KASAN_SHADOW_OFFSET) \ | |
15 | --param asan-stack=1 --param asan-globals=1 \ | |
16 | --param asan-instrumentation-with-call-threshold=$(call_threshold)) | |
17 | ||
18 | ifeq ($(call cc-option, $(CFLAGS_KASAN_MINIMAL) -Werror),) | |
19 | ifneq ($(CONFIG_COMPILE_TEST),y) | |
20 | $(warning Cannot use CONFIG_KASAN: \ | |
21 | -fsanitize=kernel-address is not supported by compiler) | |
22 | endif | |
23 | else | |
24 | ifeq ($(CFLAGS_KASAN),) | |
25 | ifneq ($(CONFIG_COMPILE_TEST),y) | |
26 | $(warning CONFIG_KASAN: compiler does not support all options.\ | |
27 | Trying minimal configuration) | |
28 | endif | |
29 | CFLAGS_KASAN := $(CFLAGS_KASAN_MINIMAL) | |
30 | endif | |
31 | endif | |
32 | ||
33 | ifdef CONFIG_KASAN_EXTRA | |
34 | CFLAGS_KASAN += $(call cc-option, -fsanitize-address-use-after-scope) | |
35 | endif | |
36 | ||
37 | CFLAGS_KASAN_NOSANITIZE := -fno-builtin | |
38 | ||
39 | endif |