lib: Add ASan stub
Add a Kconfig option to enable address sanitizer on x86 architecture.
Create ASan dummy functions. And add relevant gcc flags to compile
ramstage with ASan.
Change-Id: I6d87e48b6786f02dd46ea74e702f294082fd8891
Signed-off-by: Harshit Sharma <harshitsharmajs@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/42271
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Werner Zeh <werner.zeh@siemens.com>
diff --git a/src/lib/Makefile.inc b/src/lib/Makefile.inc
index 72d4f24..0b43427 100644
--- a/src/lib/Makefile.inc
+++ b/src/lib/Makefile.inc
@@ -7,6 +7,18 @@
CFLAGS_ramstage += -fsanitize=undefined
endif
+ifeq ($(CONFIG_ASAN_IN_RAMSTAGE),y)
+ramstage-y += asan.c
+CFLAGS_asan += -fsanitize=kernel-address \
+ --param asan-stack=1 --param asan-globals=1 \
+ --param asan-instrumentation-with-call-threshold=0 \
+ -fsanitize-address-use-after-scope \
+ --param use-after-scope-direct-emission-threshold=0
+CFLAGS_ramstage += $(CFLAGS_asan)
+# Allow memory access without __asan_load and __asan_store checks.
+$(obj)/ramstage/lib/asan.o: CFLAGS_asan =
+endif
+
decompressor-y += decompressor.c
$(call src-to-obj,decompressor,$(dir)/decompressor.c): $(objcbfs)/bootblock.lz4
$(call src-to-obj,decompressor,$(dir)/decompressor.c): CCACHE_EXTRAFILES=$(objcbfs)/bootblock.lz4