Commit | Line | Data |
---|---|---|
b2441318 | 1 | # SPDX-License-Identifier: GPL-2.0 |
34b5560d MR |
2 | CFLAGS_KASAN_NOSANITIZE := -fno-builtin |
3 | KASAN_SHADOW_OFFSET ?= $(CONFIG_KASAN_SHADOW_OFFSET) | |
34b5560d | 4 | |
5c595ac4 AB |
5 | cc-param = $(call cc-option, -mllvm -$(1), $(call cc-option, --param $(1))) |
6 | ||
02c58773 WW |
7 | ifdef CONFIG_KASAN_STACK |
8 | stack_enable := 1 | |
9 | else | |
10 | stack_enable := 0 | |
11 | endif | |
12 | ||
2bd926b4 AK |
13 | ifdef CONFIG_KASAN_GENERIC |
14 | ||
0b24becc AR |
15 | ifdef CONFIG_KASAN_INLINE |
16 | call_threshold := 10000 | |
17 | else | |
18 | call_threshold := 0 | |
19 | endif | |
20 | ||
21 | CFLAGS_KASAN_MINIMAL := -fsanitize=kernel-address | |
22 | ||
2bd926b4 AK |
23 | # -fasan-shadow-offset fails without -fsanitize |
24 | CFLAGS_KASAN_SHADOW := $(call cc-option, -fsanitize=kernel-address \ | |
1a69e7ce AR |
25 | -fasan-shadow-offset=$(KASAN_SHADOW_OFFSET), \ |
26 | $(call cc-option, -fsanitize=kernel-address \ | |
27 | -mllvm -asan-mapping-offset=$(KASAN_SHADOW_OFFSET))) | |
28 | ||
2bd926b4 AK |
29 | ifeq ($(strip $(CFLAGS_KASAN_SHADOW)),) |
30 | CFLAGS_KASAN := $(CFLAGS_KASAN_MINIMAL) | |
31 | else | |
32 | # Now add all the compiler specific options that are valid standalone | |
33 | CFLAGS_KASAN := $(CFLAGS_KASAN_SHADOW) \ | |
34 | $(call cc-param,asan-globals=1) \ | |
35 | $(call cc-param,asan-instrumentation-with-call-threshold=$(call_threshold)) \ | |
2bd926b4 | 36 | $(call cc-param,asan-instrument-allocas=1) |
0b24becc | 37 | endif |
c5caf21a | 38 | |
19532869 NC |
39 | CFLAGS_KASAN += $(call cc-param,asan-stack=$(stack_enable)) |
40 | ||
2bd926b4 | 41 | endif # CONFIG_KASAN_GENERIC |
0e410e15 | 42 | |
2bd926b4 AK |
43 | ifdef CONFIG_KASAN_SW_TAGS |
44 | ||
45 | ifdef CONFIG_KASAN_INLINE | |
5c595ac4 | 46 | instrumentation_flags := $(call cc-param,hwasan-mapping-offset=$(KASAN_SHADOW_OFFSET)) |
2bd926b4 | 47 | else |
5c595ac4 | 48 | instrumentation_flags := $(call cc-param,hwasan-instrument-with-calls=1) |
2bd926b4 AK |
49 | endif |
50 | ||
51 | CFLAGS_KASAN := -fsanitize=kernel-hwaddress \ | |
02c58773 | 52 | $(call cc-param,hwasan-instrument-stack=$(stack_enable)) \ |
5c595ac4 | 53 | $(call cc-param,hwasan-use-short-granules=0) \ |
1cbdf60b | 54 | $(call cc-param,hwasan-inline-all-checks=0) \ |
2bd926b4 AK |
55 | $(instrumentation_flags) |
56 | ||
57 | endif # CONFIG_KASAN_SW_TAGS | |
bb273211 MY |
58 | |
59 | export CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE |