# SPDX-License-Identifier: GPL-2.0 ifdef CONFIG_CC_HAS_KASAN_MEMINTRINSIC_PREFIX# Safe for compiler to generate meminstrinsic calls in uninstrumented files.CFLAGS_KASAN_NOSANITIZE :=else# Don't let compiler generate memintrinsic calls in uninstrumented files# because they are instrumented.CFLAGS_KASAN_NOSANITIZE := -fno-builtinendif KASAN_SHADOW_OFFSET ?= $(CONFIG_KASAN_SHADOW_OFFSET) cc-param = $(call cc-option, -mllvm -$(1), $(call cc-option, --param $(1))) ifdef CONFIG_KASAN_STACK	stack_enable := 1else	stack_enable := 0endif ifdef CONFIG_KASAN_GENERIC ifdef CONFIG_KASAN_INLINE	call_threshold := 10000else	call_threshold := 0endif CFLAGS_KASAN_MINIMAL := -fsanitize=kernel-address # -fasan-shadow-offset fails without -fsanitizeCFLAGS_KASAN_SHADOW := $(call cc-option, -fsanitize=kernel-address \			-fasan-shadow-offset=$(KASAN_SHADOW_OFFSET), \			$(call cc-option, -fsanitize=kernel-address \			-mllvm -asan-mapping-offset=$(KASAN_SHADOW_OFFSET))) ifeq ($(strip $(CFLAGS_KASAN_SHADOW)),)	CFLAGS_KASAN := $(CFLAGS_KASAN_MINIMAL)else	# Now add all the compiler specific options that are valid standalone	CFLAGS_KASAN := $(CFLAGS_KASAN_SHADOW) \	 $(call cc-param,asan-globals=1) \	 $(call cc-param,asan-instrumentation-with-call-threshold=$(call_threshold)) \	 $(call cc-param,asan-instrument-allocas=1)endif CFLAGS_KASAN += $(call cc-param,asan-stack=$(stack_enable)) # Instrument memcpy/memset/memmove calls by using instrumented __asan_mem*()# instead. With compilers that don't support this option, compiler-inserted# memintrinsics won't be checked by KASAN on GENERIC_ENTRY architectures.CFLAGS_KASAN += $(call cc-param,asan-kernel-mem-intrinsic-prefix=1) endif # CONFIG_KASAN_GENERIC ifdef CONFIG_KASAN_SW_TAGS ifdef CONFIG_KASAN_INLINE    instrumentation_flags := $(call cc-param,hwasan-mapping-offset=$(KASAN_SHADOW_OFFSET))else    instrumentation_flags := $(call cc-param,hwasan-instrument-with-calls=1)endif CFLAGS_KASAN := -fsanitize=kernel-hwaddress \		$(call cc-param,hwasan-instrument-stack=$(stack_enable)) \		$(call cc-param,hwasan-use-short-granules=0) \		$(call cc-param,hwasan-inline-all-checks=0) \		$(instrumentation_flags) # Instrument memcpy/memset/memmove calls by using instrumented __hwasan_mem*().ifeq ($(call clang-min-version, 150000)$(call gcc-min-version, 130000),y)CFLAGS_KASAN += $(call cc-param,hwasan-kernel-mem-intrinsic-prefix=1)endif endif # CONFIG_KASAN_SW_TAGS export CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE