# SPDX-License-Identifier: GPL-2.0

  ifdef CONFIG_KASAN
  CFLAGS_KASAN_NOSANITIZE := -fno-builtin
  KASAN_SHADOW_OFFSET ?= $(CONFIG_KASAN_SHADOW_OFFSET)
  endif

  ifdef CONFIG_KASAN_GENERIC

  ifdef CONFIG_KASAN_INLINE
  	call_threshold := 10000
  else
  	call_threshold := 0
  endif
  
  CFLAGS_KASAN_MINIMAL := -fsanitize=kernel-address

  cc-param = $(call cc-option, -mllvm -$(1), $(call cc-option, --param $(1)))

  # -fasan-shadow-offset fails without -fsanitize
  CFLAGS_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)) \

  	 $(call cc-param,asan-stack=$(CONFIG_KASAN_STACK)) \

  	 $(call cc-param,asan-instrument-allocas=1)

  endif

  endif # CONFIG_KASAN_GENERIC

  ifdef CONFIG_KASAN_SW_TAGS
  
  ifdef CONFIG_KASAN_INLINE
      instrumentation_flags := -mllvm -hwasan-mapping-offset=$(KASAN_SHADOW_OFFSET)
  else
      instrumentation_flags := -mllvm -hwasan-instrument-with-calls=1
  endif
  
  CFLAGS_KASAN := -fsanitize=kernel-hwaddress \
  		-mllvm -hwasan-instrument-stack=0 \
  		$(instrumentation_flags)
  
  endif # CONFIG_KASAN_SW_TAGS