blob: d809e00d6b61c68c0907ef2597f6b212a414a3d4
| 1 | ifdef CONFIG_KASAN |
| 2 | ifdef CONFIG_KASAN_INLINE |
| 3 | call_threshold := 10000 |
| 4 | else |
| 5 | call_threshold := 0 |
| 6 | endif |
| 7 | |
| 8 | KASAN_SHADOW_OFFSET ?= $(CONFIG_KASAN_SHADOW_OFFSET) |
| 9 | |
| 10 | CFLAGS_KASAN_MINIMAL := -fsanitize=kernel-address |
| 11 | |
| 12 | cc-param = $(call cc-option, -mllvm -$(1), $(call cc-option, --param $(1))) |
| 13 | |
| 14 | ifeq ($(call cc-option, $(CFLAGS_KASAN_MINIMAL) -Werror),) |
| 15 | ifneq ($(CONFIG_COMPILE_TEST),y) |
| 16 | $(warning Cannot use CONFIG_KASAN: \ |
| 17 | -fsanitize=kernel-address is not supported by compiler) |
| 18 | endif |
| 19 | else |
| 20 | # -fasan-shadow-offset fails without -fsanitize |
| 21 | CFLAGS_KASAN_SHADOW := $(call cc-option, -fsanitize=kernel-address \ |
| 22 | -fasan-shadow-offset=$(KASAN_SHADOW_OFFSET), \ |
| 23 | $(call cc-option, -fsanitize=kernel-address \ |
| 24 | -mllvm -asan-mapping-offset=$(KASAN_SHADOW_OFFSET))) |
| 25 | |
| 26 | ifeq ($(strip $(CFLAGS_KASAN_SHADOW)),) |
| 27 | CFLAGS_KASAN := $(CFLAGS_KASAN_MINIMAL) |
| 28 | else |
| 29 | # Now add all the compiler specific options that are valid standalone |
| 30 | CFLAGS_KASAN := $(CFLAGS_KASAN_SHADOW) \ |
| 31 | $(call cc-param,asan-globals=1) \ |
| 32 | $(call cc-param,asan-instrumentation-with-call-threshold=$(call_threshold)) \ |
| 33 | $(call cc-param,asan-stack=1) \ |
| 34 | $(call cc-param,asan-use-after-scope=1) \ |
| 35 | $(call cc-param,asan-instrument-allocas=1) |
| 36 | endif |
| 37 | |
| 38 | endif |
| 39 | |
| 40 | CFLAGS_KASAN_NOSANITIZE := -fno-builtin |
| 41 | |
| 42 | endif |
| 43 |