diff options
Diffstat (limited to 'scripts')
| -rw-r--r-- | scripts/Makefile.kasan | 31 | ||||
| -rw-r--r-- | scripts/Makefile.lib | 10 | ||||
| -rw-r--r-- | scripts/module-common.lds | 3 |
3 files changed, 44 insertions, 0 deletions
diff --git a/scripts/Makefile.kasan b/scripts/Makefile.kasan new file mode 100644 index 000000000000..37323b0df374 --- /dev/null +++ b/scripts/Makefile.kasan @@ -0,0 +1,31 @@ +ifdef CONFIG_KASAN +ifdef CONFIG_KASAN_INLINE + call_threshold := 10000 +else + call_threshold := 0 +endif + +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) + $(warning Cannot use CONFIG_KASAN: \ + -fsanitize=kernel-address is not supported by compiler) + endif +else + ifeq ($(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) + endif +endif +endif diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib index 511755200634..044eb4f89a91 100644 --- a/scripts/Makefile.lib +++ b/scripts/Makefile.lib @@ -119,6 +119,16 @@ _c_flags += $(if $(patsubst n%,, \ $(CFLAGS_GCOV)) endif +# +# Enable address sanitizer flags for kernel except some files or directories +# we don't want to check (depends on variables KASAN_SANITIZE_obj.o, KASAN_SANITIZE) +# +ifeq ($(CONFIG_KASAN),y) +_c_flags += $(if $(patsubst n%,, \ + $(KASAN_SANITIZE_$(basetarget).o)$(KASAN_SANITIZE)y), \ + $(CFLAGS_KASAN)) +endif + # If building the kernel in a separate objtree expand all occurrences # of -Idir to -I$(srctree)/dir except for absolute paths (starting with '/'). diff --git a/scripts/module-common.lds b/scripts/module-common.lds index 0865b3e752be..c25bbd1c5f2e 100644 --- a/scripts/module-common.lds +++ b/scripts/module-common.lds @@ -16,4 +16,7 @@ SECTIONS { __kcrctab_unused : { *(SORT(___kcrctab_unused+*)) } __kcrctab_unused_gpl : { *(SORT(___kcrctab_unused_gpl+*)) } __kcrctab_gpl_future : { *(SORT(___kcrctab_gpl_future+*)) } + + . = ALIGN(8); + .init_array 0 : { *(SORT(.init_array.*)) *(.init_array) } } |