diff options
Diffstat (limited to 'scripts/Makefile.kasan')
| -rw-r--r-- | scripts/Makefile.kasan | 66 |
1 files changed, 47 insertions, 19 deletions
diff --git a/scripts/Makefile.kasan b/scripts/Makefile.kasan index 97a56c0b565a..031b62f8c518 100644 --- a/scripts/Makefile.kasan +++ b/scripts/Makefile.kasan @@ -1,5 +1,6 @@ # SPDX-License-Identifier: GPL-2.0 -ifdef CONFIG_KASAN +ifdef CONFIG_KASAN_GENERIC + ifdef CONFIG_KASAN_INLINE call_threshold := 10000 else @@ -10,30 +11,57 @@ KASAN_SHADOW_OFFSET ?= $(CONFIG_KASAN_SHADOW_OFFSET) CFLAGS_KASAN_MINIMAL := -fsanitize=kernel-address -CFLAGS_KASAN := $(call cc-option, -fsanitize=kernel-address \ - -fasan-shadow-offset=$(KASAN_SHADOW_OFFSET) \ - --param asan-stack=1 --param asan-globals=1 \ - --param asan-instrumentation-with-call-threshold=$(call_threshold)) - ifeq ($(call cc-option, $(CFLAGS_KASAN_MINIMAL) -Werror),) - ifneq ($(CONFIG_COMPILE_TEST),y) - $(warning Cannot use CONFIG_KASAN: \ - -fsanitize=kernel-address is not supported by compiler) - endif + ifneq ($(CONFIG_COMPILE_TEST),y) + $(error Cannot use CONFIG_KASAN_GENERIC: \ + -fsanitize=kernel-address is not supported by compiler) + endif +endif + +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 := $(CFLAGS_KASAN_MINIMAL) else - ifeq ($(CFLAGS_KASAN),) - ifneq ($(CONFIG_COMPILE_TEST),y) - $(warning CONFIG_KASAN: compiler does not support all options.\ - Trying minimal configuration) - endif - CFLAGS_KASAN := $(CFLAGS_KASAN_MINIMAL) + # 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)) \ + $(call cc-param,asan-instrument-allocas=1) +endif + +endif # CONFIG_KASAN_GENERIC + +ifdef CONFIG_KASAN_SW_TAGS + +CFLAGS_KASAN_MINIMAL := -fsanitize=kernel-hwaddress + +ifeq ($(call cc-option, $(CFLAGS_KASAN_MINIMAL) -Werror),) + ifneq ($(CONFIG_COMPILE_TEST),y) + $(error Cannot use CONFIG_KASAN_SW_TAGS: \ + -fsanitize=kernel-hwaddress is not supported by compiler) endif endif -ifdef CONFIG_KASAN_EXTRA -CFLAGS_KASAN += $(call cc-option, -fsanitize-address-use-after-scope) +ifdef CONFIG_KASAN_INLINE + instrumentation_flags := -mllvm -hwasan-mapping-offset=$(KASAN_SHADOW_OFFSET) +else + instrumentation_flags := -mllvm -hwasan-instrument-with-calls=1 endif -CFLAGS_KASAN_NOSANITIZE := -fno-builtin +CFLAGS_KASAN := -fsanitize=kernel-hwaddress \ + -mllvm -hwasan-instrument-stack=0 \ + $(instrumentation_flags) + +endif # CONFIG_KASAN_SW_TAGS +ifdef CONFIG_KASAN +CFLAGS_KASAN_NOSANITIZE := -fno-builtin endif |