Add ARMv8.3 pointer authentication support
ARMv8.3-PAuth adds functionality that supports address authentication of
the contents of a register before that register is used as the target of
an indirect branch, or as a load.
This feature is supported only in AArch64 state.
This feature is mandatory in ARMv8.3 implementations.
This patch adds the functionality needed for platforms to provide
authentication keys for the TF-A Test Framework, and a new option
(ENABLE_PAUTH) to enable pointer authentication in the framework itself.
This option is disabled by default.
Pointer authentication support has been added to FVP.
Change-Id: Id2d5c978deb68ae60107879f1c3d0b231cba9f42
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>
diff --git a/Makefile b/Makefile
index a491bc4..9be108d 100644
--- a/Makefile
+++ b/Makefile
@@ -135,6 +135,7 @@
################################################################################
$(eval $(call assert_boolean,DEBUG))
$(eval $(call assert_boolean,ENABLE_ASSERTIONS))
+$(eval $(call assert_boolean,ENABLE_PAUTH))
$(eval $(call assert_boolean,FIRMWARE_UPDATE))
$(eval $(call assert_boolean,FWU_BL_TEST))
$(eval $(call assert_boolean,NEW_TEST_SESSION))
@@ -149,6 +150,7 @@
$(eval $(call add_define,TFTF_DEFINES,ARM_ARCH_MINOR))
$(eval $(call add_define,TFTF_DEFINES,DEBUG))
$(eval $(call add_define,TFTF_DEFINES,ENABLE_ASSERTIONS))
+$(eval $(call add_define,TFTF_DEFINES,ENABLE_PAUTH))
$(eval $(call add_define,TFTF_DEFINES,LOG_LEVEL))
$(eval $(call add_define,TFTF_DEFINES,NEW_TEST_SESSION))
$(eval $(call add_define,TFTF_DEFINES,PLAT_${PLAT}))
@@ -211,6 +213,10 @@
TFTF_ASFLAGS += ${COMMON_ASFLAGS}
TFTF_LDFLAGS += ${COMMON_LDFLAGS}
+ifeq (${ENABLE_PAUTH},1)
+TFTF_CFLAGS += -msign-return-address=non-leaf
+endif
+
NS_BL1U_SOURCES += ${PLAT_SOURCES} ${LIBC_SRCS}
NS_BL1U_INCLUDES += ${PLAT_INCLUDES}
NS_BL1U_CFLAGS += ${COMMON_CFLAGS}