diff options
Diffstat (limited to 'scripts/Makefile.kasan')
| -rw-r--r-- | scripts/Makefile.kasan | 53 |
1 files changed, 31 insertions, 22 deletions
diff --git a/scripts/Makefile.kasan b/scripts/Makefile.kasan index 69552a39951d..25c259df8ffa 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 @@ -12,36 +13,44 @@ CFLAGS_KASAN_MINIMAL := -fsanitize=kernel-address cc-param = $(call cc-option, -mllvm -$(1), $(call cc-option, --param $(1))) -ifeq ($(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 -else - # -fasan-shadow-offset fails without -fsanitize - CFLAGS_KASAN_SHADOW := $(call cc-option, -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-stack=1) \ - $(call cc-param,asan-use-after-scope=1) \ - $(call cc-param,asan-instrument-allocas=1) - endif - +ifeq ($(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-stack=1) \ + $(call cc-param,asan-use-after-scope=1) \ + $(call cc-param,asan-instrument-allocas=1) endif ifdef CONFIG_KASAN_EXTRA CFLAGS_KASAN += $(call cc-option, -fsanitize-address-use-after-scope) endif -CFLAGS_KASAN_NOSANITIZE := -fno-builtin +endif # CONFIG_KASAN_GENERIC +ifdef CONFIG_KASAN_SW_TAGS + +ifdef CONFIG_KASAN_INLINE + instrumentation_flags := -mllvm -hwasan-mapping-offset=$(KASAN_SHADOW_OFFSET) +else + instrumentation_flags := -mllvm -hwasan-instrument-with-calls=1 +endif + +CFLAGS_KASAN := -fsanitize=kernel-hwaddress \ + -mllvm -hwasan-instrument-stack=0 \ + $(instrumentation_flags) + +endif # CONFIG_KASAN_SW_TAGS + +ifdef CONFIG_KASAN +CFLAGS_KASAN_NOSANITIZE := -fno-builtin endif |