| # SPDX-License-Identifier: GPL-2.0 |
| ifdef CONFIG_KASAN |
| ifdef CONFIG_KASAN_INLINE |
| call_threshold := 10000 |
| else |
| call_threshold := 0 |
| endif |
| |
| KASAN_SHADOW_OFFSET ?= $(CONFIG_KASAN_SHADOW_OFFSET) |
| |
| CFLAGS_KASAN_MINIMAL := -fsanitize=kernel-address |
| |
| CFLAGS_KASAN := $(call cc-option, -fsanitize=kernel-address \ |
| -fasan-shadow-offset=$(KASAN_SHADOW_OFFSET) \ |
| --param asan-stack=1 --param asan-globals=1 \ |
| --param asan-instrumentation-with-call-threshold=$(call_threshold)) |
| |
| ifeq ($(call cc-option, $(CFLAGS_KASAN_MINIMAL) -Werror),) |
| ifneq ($(CONFIG_COMPILE_TEST),y) |
| $(warning Cannot use CONFIG_KASAN: \ |
| -fsanitize=kernel-address is not supported by compiler) |
| endif |
| else |
| ifeq ($(CFLAGS_KASAN),) |
| ifneq ($(CONFIG_COMPILE_TEST),y) |
| $(warning CONFIG_KASAN: compiler does not support all options.\ |
| Trying minimal configuration) |
| endif |
| CFLAGS_KASAN := $(CFLAGS_KASAN_MINIMAL) |
| endif |
| endif |
| |
| ifdef CONFIG_KASAN_EXTRA |
| CFLAGS_KASAN += $(call cc-option, -fsanitize-address-use-after-scope) |
| endif |
| |
| CFLAGS_KASAN_NOSANITIZE := -fno-builtin |
| |
| endif |
