1b2441318SGreg Kroah-Hartman# SPDX-License-Identifier: GPL-2.0 236be5cbaSMarco Elver 336be5cbaSMarco Elverifdef CONFIG_CC_HAS_KASAN_MEMINTRINSIC_PREFIX 436be5cbaSMarco Elver# Safe for compiler to generate meminstrinsic calls in uninstrumented files. 536be5cbaSMarco ElverCFLAGS_KASAN_NOSANITIZE := 636be5cbaSMarco Elverelse 736be5cbaSMarco Elver# Don't let compiler generate memintrinsic calls in uninstrumented files 836be5cbaSMarco Elver# because they are instrumented. 934b5560dSMark RutlandCFLAGS_KASAN_NOSANITIZE := -fno-builtin 1036be5cbaSMarco Elverendif 1136be5cbaSMarco Elver 1234b5560dSMark RutlandKASAN_SHADOW_OFFSET ?= $(CONFIG_KASAN_SHADOW_OFFSET) 1334b5560dSMark Rutland 145c595ac4SArnd Bergmanncc-param = $(call cc-option, -mllvm -$(1), $(call cc-option, --param $(1))) 155c595ac4SArnd Bergmann 1602c58773SWalter Wuifdef CONFIG_KASAN_STACK 1702c58773SWalter Wu stack_enable := 1 1802c58773SWalter Wuelse 1902c58773SWalter Wu stack_enable := 0 2002c58773SWalter Wuendif 2102c58773SWalter Wu 222bd926b4SAndrey Konovalovifdef CONFIG_KASAN_GENERIC 232bd926b4SAndrey Konovalov 240b24beccSAndrey Ryabininifdef CONFIG_KASAN_INLINE 250b24beccSAndrey Ryabinin call_threshold := 10000 260b24beccSAndrey Ryabininelse 270b24beccSAndrey Ryabinin call_threshold := 0 280b24beccSAndrey Ryabininendif 290b24beccSAndrey Ryabinin 300b24beccSAndrey RyabininCFLAGS_KASAN_MINIMAL := -fsanitize=kernel-address 310b24beccSAndrey Ryabinin 321a69e7ceSAndrey Ryabinin# -fasan-shadow-offset fails without -fsanitize 331a69e7ceSAndrey RyabininCFLAGS_KASAN_SHADOW := $(call cc-option, -fsanitize=kernel-address \ 341a69e7ceSAndrey Ryabinin -fasan-shadow-offset=$(KASAN_SHADOW_OFFSET), \ 351a69e7ceSAndrey Ryabinin $(call cc-option, -fsanitize=kernel-address \ 361a69e7ceSAndrey Ryabinin -mllvm -asan-mapping-offset=$(KASAN_SHADOW_OFFSET))) 371a69e7ceSAndrey Ryabinin 381a69e7ceSAndrey Ryabininifeq ($(strip $(CFLAGS_KASAN_SHADOW)),) 390b24beccSAndrey Ryabinin CFLAGS_KASAN := $(CFLAGS_KASAN_MINIMAL) 401a69e7ceSAndrey Ryabininelse 411a69e7ceSAndrey Ryabinin # Now add all the compiler specific options that are valid standalone 421a69e7ceSAndrey Ryabinin CFLAGS_KASAN := $(CFLAGS_KASAN_SHADOW) \ 431a69e7ceSAndrey Ryabinin $(call cc-param,asan-globals=1) \ 441a69e7ceSAndrey Ryabinin $(call cc-param,asan-instrumentation-with-call-threshold=$(call_threshold)) \ 45342061eeSPaul Lawrence $(call cc-param,asan-instrument-allocas=1) 460b24beccSAndrey Ryabininendif 471a69e7ceSAndrey Ryabinin 4819532869SNathan ChancellorCFLAGS_KASAN += $(call cc-param,asan-stack=$(stack_enable)) 4919532869SNathan Chancellor 5051287dcbSMarco Elver# Instrument memcpy/memset/memmove calls by using instrumented __asan_mem*() 5151287dcbSMarco Elver# instead. With compilers that don't support this option, compiler-inserted 5251287dcbSMarco Elver# memintrinsics won't be checked by KASAN on GENERIC_ENTRY architectures. 5351287dcbSMarco ElverCFLAGS_KASAN += $(call cc-param,asan-kernel-mem-intrinsic-prefix=1) 5451287dcbSMarco Elver 552bd926b4SAndrey Konovalovendif # CONFIG_KASAN_GENERIC 560e410e15SAndrey Konovalov 572bd926b4SAndrey Konovalovifdef CONFIG_KASAN_SW_TAGS 582bd926b4SAndrey Konovalov 592bd926b4SAndrey Konovalovifdef CONFIG_KASAN_INLINE 605c595ac4SArnd Bergmann instrumentation_flags := $(call cc-param,hwasan-mapping-offset=$(KASAN_SHADOW_OFFSET)) 612bd926b4SAndrey Konovalovelse 625c595ac4SArnd Bergmann instrumentation_flags := $(call cc-param,hwasan-instrument-with-calls=1) 632bd926b4SAndrey Konovalovendif 642bd926b4SAndrey Konovalov 652bd926b4SAndrey KonovalovCFLAGS_KASAN := -fsanitize=kernel-hwaddress \ 6602c58773SWalter Wu $(call cc-param,hwasan-instrument-stack=$(stack_enable)) \ 675c595ac4SArnd Bergmann $(call cc-param,hwasan-use-short-granules=0) \ 681cbdf60bSPeter Collingbourne $(call cc-param,hwasan-inline-all-checks=0) \ 692bd926b4SAndrey Konovalov $(instrumentation_flags) 702bd926b4SAndrey Konovalov 7151287dcbSMarco Elver# Instrument memcpy/memset/memmove calls by using instrumented __hwasan_mem*(). 72*90fd8336SArnd Bergmannifeq ($(call clang-min-version, 150000)$(call gcc-min-version, 130000),y) 7351287dcbSMarco ElverCFLAGS_KASAN += $(call cc-param,hwasan-kernel-mem-intrinsic-prefix=1) 74*90fd8336SArnd Bergmannendif 7551287dcbSMarco Elver 762bd926b4SAndrey Konovalovendif # CONFIG_KASAN_SW_TAGS 77bb273211SMasahiro Yamada 78bb273211SMasahiro Yamadaexport CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE 79