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Diffstat (limited to '')
| -rw-r--r-- | scripts/Makefile.kasan | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/scripts/Makefile.kasan b/scripts/Makefile.kasan new file mode 100644 index 000000000..127012f45 --- /dev/null +++ b/scripts/Makefile.kasan @@ -0,0 +1,51 @@ +# SPDX-License-Identifier: GPL-2.0 +CFLAGS_KASAN_NOSANITIZE := -fno-builtin +KASAN_SHADOW_OFFSET ?= $(CONFIG_KASAN_SHADOW_OFFSET) + +cc-param = $(call cc-option, -mllvm -$(1), $(call cc-option, --param $(1))) + +ifdef CONFIG_KASAN_GENERIC + +ifdef CONFIG_KASAN_INLINE + call_threshold := 10000 +else + call_threshold := 0 +endif + +CFLAGS_KASAN_MINIMAL := -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)) \ + $(call cc-param,asan-stack=$(CONFIG_KASAN_STACK)) \ + $(call cc-param,asan-instrument-allocas=1) +endif + +endif # CONFIG_KASAN_GENERIC + +ifdef CONFIG_KASAN_SW_TAGS + +ifdef CONFIG_KASAN_INLINE + instrumentation_flags := $(call cc-param,hwasan-mapping-offset=$(KASAN_SHADOW_OFFSET)) +else + instrumentation_flags := $(call cc-param,hwasan-instrument-with-calls=1) +endif + +CFLAGS_KASAN := -fsanitize=kernel-hwaddress \ + $(call cc-param,hwasan-instrument-stack=$(CONFIG_KASAN_STACK)) \ + $(call cc-param,hwasan-use-short-granules=0) \ + $(instrumentation_flags) + +endif # CONFIG_KASAN_SW_TAGS + +export CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE |