diff options
Diffstat (limited to 'scripts/Makefile.kasan')
| -rw-r--r-- | scripts/Makefile.kasan | 49 |
1 files changed, 38 insertions, 11 deletions
diff --git a/scripts/Makefile.kasan b/scripts/Makefile.kasan index 6410bd22fe38..390658a2d5b7 100644 --- a/scripts/Makefile.kasan +++ b/scripts/Makefile.kasan @@ -1,4 +1,24 @@ # 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-builtin +endif + +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 @@ -7,12 +27,8 @@ else call_threshold := 0 endif -KASAN_SHADOW_OFFSET ?= $(CONFIG_KASAN_SHADOW_OFFSET) - 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), \ @@ -26,26 +42,37 @@ else 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 +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 += $(call cc-param,asan-kernel-mem-intrinsic-prefix=1) + endif # CONFIG_KASAN_GENERIC ifdef CONFIG_KASAN_SW_TAGS ifdef CONFIG_KASAN_INLINE - instrumentation_flags := -mllvm -hwasan-mapping-offset=$(KASAN_SHADOW_OFFSET) + instrumentation_flags := $(call cc-param,hwasan-mapping-offset=$(KASAN_SHADOW_OFFSET)) else - instrumentation_flags := -mllvm -hwasan-instrument-with-calls=1 + instrumentation_flags := $(call cc-param,hwasan-instrument-with-calls=1) endif CFLAGS_KASAN := -fsanitize=kernel-hwaddress \ - -mllvm -hwasan-instrument-stack=0 \ + $(call cc-param,hwasan-instrument-stack=$(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 -ifdef CONFIG_KASAN -CFLAGS_KASAN_NOSANITIZE := -fno-builtin -endif +export CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE |