162306a36Sopenharmony_ci# SPDX-License-Identifier: GPL-2.0 262306a36Sopenharmony_ci 362306a36Sopenharmony_ciifdef CONFIG_CC_HAS_KASAN_MEMINTRINSIC_PREFIX 462306a36Sopenharmony_ci# Safe for compiler to generate meminstrinsic calls in uninstrumented files. 562306a36Sopenharmony_ciCFLAGS_KASAN_NOSANITIZE := 662306a36Sopenharmony_cielse 762306a36Sopenharmony_ci# Don't let compiler generate memintrinsic calls in uninstrumented files 862306a36Sopenharmony_ci# because they are instrumented. 962306a36Sopenharmony_ciCFLAGS_KASAN_NOSANITIZE := -fno-builtin 1062306a36Sopenharmony_ciendif 1162306a36Sopenharmony_ci 1262306a36Sopenharmony_ciKASAN_SHADOW_OFFSET ?= $(CONFIG_KASAN_SHADOW_OFFSET) 1362306a36Sopenharmony_ci 1462306a36Sopenharmony_cicc-param = $(call cc-option, -mllvm -$(1), $(call cc-option, --param $(1))) 1562306a36Sopenharmony_ci 1662306a36Sopenharmony_ciifdef CONFIG_KASAN_STACK 1762306a36Sopenharmony_ci stack_enable := 1 1862306a36Sopenharmony_cielse 1962306a36Sopenharmony_ci stack_enable := 0 2062306a36Sopenharmony_ciendif 2162306a36Sopenharmony_ci 2262306a36Sopenharmony_ciifdef CONFIG_KASAN_GENERIC 2362306a36Sopenharmony_ci 2462306a36Sopenharmony_ciifdef CONFIG_KASAN_INLINE 2562306a36Sopenharmony_ci call_threshold := 10000 2662306a36Sopenharmony_cielse 2762306a36Sopenharmony_ci call_threshold := 0 2862306a36Sopenharmony_ciendif 2962306a36Sopenharmony_ci 3062306a36Sopenharmony_ciCFLAGS_KASAN_MINIMAL := -fsanitize=kernel-address 3162306a36Sopenharmony_ci 3262306a36Sopenharmony_ci# -fasan-shadow-offset fails without -fsanitize 3362306a36Sopenharmony_ciCFLAGS_KASAN_SHADOW := $(call cc-option, -fsanitize=kernel-address \ 3462306a36Sopenharmony_ci -fasan-shadow-offset=$(KASAN_SHADOW_OFFSET), \ 3562306a36Sopenharmony_ci $(call cc-option, -fsanitize=kernel-address \ 3662306a36Sopenharmony_ci -mllvm -asan-mapping-offset=$(KASAN_SHADOW_OFFSET))) 3762306a36Sopenharmony_ci 3862306a36Sopenharmony_ciifeq ($(strip $(CFLAGS_KASAN_SHADOW)),) 3962306a36Sopenharmony_ci CFLAGS_KASAN := $(CFLAGS_KASAN_MINIMAL) 4062306a36Sopenharmony_cielse 4162306a36Sopenharmony_ci # Now add all the compiler specific options that are valid standalone 4262306a36Sopenharmony_ci CFLAGS_KASAN := $(CFLAGS_KASAN_SHADOW) \ 4362306a36Sopenharmony_ci $(call cc-param,asan-globals=1) \ 4462306a36Sopenharmony_ci $(call cc-param,asan-instrumentation-with-call-threshold=$(call_threshold)) \ 4562306a36Sopenharmony_ci $(call cc-param,asan-instrument-allocas=1) 4662306a36Sopenharmony_ciendif 4762306a36Sopenharmony_ci 4862306a36Sopenharmony_ciCFLAGS_KASAN += $(call cc-param,asan-stack=$(stack_enable)) 4962306a36Sopenharmony_ci 5062306a36Sopenharmony_ci# Instrument memcpy/memset/memmove calls by using instrumented __asan_mem*() 5162306a36Sopenharmony_ci# instead. With compilers that don't support this option, compiler-inserted 5262306a36Sopenharmony_ci# memintrinsics won't be checked by KASAN on GENERIC_ENTRY architectures. 5362306a36Sopenharmony_ciCFLAGS_KASAN += $(call cc-param,asan-kernel-mem-intrinsic-prefix=1) 5462306a36Sopenharmony_ci 5562306a36Sopenharmony_ciendif # CONFIG_KASAN_GENERIC 5662306a36Sopenharmony_ci 5762306a36Sopenharmony_ciifdef CONFIG_KASAN_SW_TAGS 5862306a36Sopenharmony_ci 5962306a36Sopenharmony_ciifdef CONFIG_KASAN_INLINE 6062306a36Sopenharmony_ci instrumentation_flags := $(call cc-param,hwasan-mapping-offset=$(KASAN_SHADOW_OFFSET)) 6162306a36Sopenharmony_cielse 6262306a36Sopenharmony_ci instrumentation_flags := $(call cc-param,hwasan-instrument-with-calls=1) 6362306a36Sopenharmony_ciendif 6462306a36Sopenharmony_ci 6562306a36Sopenharmony_ciCFLAGS_KASAN := -fsanitize=kernel-hwaddress \ 6662306a36Sopenharmony_ci $(call cc-param,hwasan-instrument-stack=$(stack_enable)) \ 6762306a36Sopenharmony_ci $(call cc-param,hwasan-use-short-granules=0) \ 6862306a36Sopenharmony_ci $(call cc-param,hwasan-inline-all-checks=0) \ 6962306a36Sopenharmony_ci $(instrumentation_flags) 7062306a36Sopenharmony_ci 7162306a36Sopenharmony_ci# Instrument memcpy/memset/memmove calls by using instrumented __hwasan_mem*(). 7262306a36Sopenharmony_ciifeq ($(call clang-min-version, 150000)$(call gcc-min-version, 130000),y) 7362306a36Sopenharmony_ciCFLAGS_KASAN += $(call cc-param,hwasan-kernel-mem-intrinsic-prefix=1) 7462306a36Sopenharmony_ciendif 7562306a36Sopenharmony_ci 7662306a36Sopenharmony_ciendif # CONFIG_KASAN_SW_TAGS 7762306a36Sopenharmony_ci 7862306a36Sopenharmony_ciexport CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE 79