Added a constant-time instruction decoder to supplement the default AEX-Notify mitigation. (#960)

Added a constant-time instruction decoder to supplement the default AEX-Notify mitigation.

Signed-off-by: Scott Constable <[email protected]>

Author: scottconstable

sdk/simulation/trtssim/linux/Makefile

@@ -71,7 +71,7 @@ TRTS1_OBJS  := init_enclave.o \
                trts_emm_sim.o
 
 TRTS2_OBJS  := trts_nsp.o
-TRTS_OBJS := $(TRTS1_OBJS) $(TRTS2_OBJS)
+TRTS_OBJS := $(TRTS1_OBJS) $(TRTS2_OBJS) ctd.o
 
 TINST_OBJS   := t_instructions.o \
                 deriv.o
@@ -93,6 +93,15 @@ TLDR_C_OBJS  := elf_parser.o  \
 
 TLDR_OBJS := $(TLDR_ASM_OBJS) $(TLDR_C_OBJS)
 
+ctd.o: $(TRTS_DIR)/ctd.c
+	$(CC) -mavx2 -O3 -masm=intel $(filter-out -O2,$(CFLAGS)) $(TCFLAGS) -c $< -o $@ \
+        -I$(COMMON_DIR)/inc/         \
+        -I$(COMMON_DIR)/inc/tlibc/   \
+        -I$(COMMON_DIR)/inc/internal \
+        -I$(LINUX_SDK_DIR)/trts/     \
+        -I$(LINUX_SDK_DIR)/pthread/  \
+        -I$(LINUX_SDK_DIR)/tlibcxx/include
+
 LIBTRTS := libsgx_trts_sim.a
 
 vpath %.cpp $(TRTS_DIR):$(TINST_DIR)

sdk/trts/Makefile

@@ -60,7 +60,9 @@ OBJS2 := trts_nsp.o
 
 OBJS3 := ema_rt.o
 
-OBJS := $(OBJS1) $(OBJS2) $(OBJ3)
+OBJS4 := ctd.o # The CTD requires AVX2
+
+OBJS := $(OBJS1) $(OBJS2) $(OBJ3) $(OBJS4)
 
 all: $(OBJS) elf_parser
 
@@ -74,6 +76,10 @@ $(OBJS2): %.o: %.cpp
 $(OBJS3): %.o: %.c
 	$(CC) -c $(TCFLAGS) $(CFLAGS) -fPIC $< -o $@
 
+$(OBJS4): %.o: %.c
+	$(CC) -mavx2 -O3 -masm=intel $(filter-out -O2,$(CFLAGS)) $(TCFLAGS) \
+		-I$(COMMON_DIR)/inc/internal -I$(COMMON_DIR)/inc -c $< -o $@
+
 .PHONY: elf_parser
 elf_parser: $(OBJS)
 	$(MAKE) -C linux