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Current File : //proc/thread-self/root/usr/src/linux-headers-5.15.0-43/scripts/Makefile.kasan

# SPDX-License-Identifier: GPL-2.0
CFLAGS_KASAN_NOSANITIZE := -fno-builtin
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 := 1
else
	stack_enable := 0
endif

ifdef CONFIG_KASAN_GENERIC

ifdef CONFIG_KASAN_INLINE
	call_threshold := 10000
else
	call_threshold := 0
endif

CFLAGS_KASAN_MINIMAL := -fsanitize=kernel-address

# -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-instrument-allocas=1)
endif

CFLAGS_KASAN += $(call cc-param,asan-stack=$(stack_enable))

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)

endif # CONFIG_KASAN_SW_TAGS

export CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE

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