projects / linux.git / blame
| 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 | |
| 2bd926b4 AK |
5 | ifdef CONFIG_KASAN_GENERIC |
| 6 | ||
| 0b24becc AR |
7 | ifdef CONFIG_KASAN_INLINE |
| 8 | call_threshold := 10000 | |
| 9 | else | |
| 10 | call_threshold := 0 | |
| 11 | endif | |
| 12 | ||
| 13 | CFLAGS_KASAN_MINIMAL := -fsanitize=kernel-address | |
| 14 | ||
| 1a69e7ce | 15 | cc-param = $(call cc-option, -mllvm -$(1), $(call cc-option, --param $(1))) |
| 0b24becc | 16 | |
| 2bd926b4 AK |
17 | # -fasan-shadow-offset fails without -fsanitize |
| 18 | CFLAGS_KASAN_SHADOW := $(call cc-option, -fsanitize=kernel-address \ | |
| 1a69e7ce AR |
19 | -fasan-shadow-offset=$(KASAN_SHADOW_OFFSET), \ |
| 20 | $(call cc-option, -fsanitize=kernel-address \ | |
| 21 | -mllvm -asan-mapping-offset=$(KASAN_SHADOW_OFFSET))) | |
| 22 | ||
| 2bd926b4 AK |
23 | ifeq ($(strip $(CFLAGS_KASAN_SHADOW)),) |
| 24 | CFLAGS_KASAN := $(CFLAGS_KASAN_MINIMAL) | |
| 25 | else | |
| 26 | # Now add all the compiler specific options that are valid standalone | |
| 27 | CFLAGS_KASAN := $(CFLAGS_KASAN_SHADOW) \ | |
| 28 | $(call cc-param,asan-globals=1) \ | |
| 29 | $(call cc-param,asan-instrumentation-with-call-threshold=$(call_threshold)) \ | |
| 6baec880 | 30 | $(call cc-param,asan-stack=$(CONFIG_KASAN_STACK)) \ |
| 2bd926b4 | 31 | $(call cc-param,asan-instrument-allocas=1) |
| 0b24becc | 32 | endif |
| c5caf21a | 33 | |
| 2bd926b4 | 34 | endif # CONFIG_KASAN_GENERIC |
| 0e410e15 | 35 | |
| 2bd926b4 AK |
36 | ifdef CONFIG_KASAN_SW_TAGS |
| 37 | ||
| 38 | ifdef CONFIG_KASAN_INLINE | |
| 39 | instrumentation_flags := -mllvm -hwasan-mapping-offset=$(KASAN_SHADOW_OFFSET) | |
| 40 | else | |
| 41 | instrumentation_flags := -mllvm -hwasan-instrument-with-calls=1 | |
| 42 | endif | |
| 43 | ||
| 44 | CFLAGS_KASAN := -fsanitize=kernel-hwaddress \ | |
| cae9dc35 AK |
45 | -mllvm -hwasan-instrument-stack=$(CONFIG_KASAN_STACK) \ |
| 46 | -mllvm -hwasan-use-short-granules=0 \ | |
| 2bd926b4 AK |
47 | $(instrumentation_flags) |
| 48 | ||
| 49 | endif # CONFIG_KASAN_SW_TAGS | |
| bb273211 MY |
50 | |
| 51 | export CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE |