application exit error handing

tests/runtime/fibonacci/Makefile

@@ -0,0 +1,39 @@
+RISCV_TOOLCHAIN_PATH ?= /opt/riscv-gnu-toolchain
+VORTEX_RT_PATH ?= $(realpath ../../../runtime)
+
+CC = $(RISCV_TOOLCHAIN_PATH)/bin/riscv32-unknown-elf-gcc
+AR = $(RISCV_TOOLCHAIN_PATH)/bin/riscv32-unknown-elf-gcc-ar
+DP = $(RISCV_TOOLCHAIN_PATH)/bin/riscv32-unknown-elf-objdump
+CP = $(RISCV_TOOLCHAIN_PATH)/bin/riscv32-unknown-elf-objcopy
+
+CFLAGS += -march=rv32imf -mabi=ilp32f -O3 -Wstack-usage=1024 -ffreestanding -nostartfiles -fdata-sections -ffunction-sections
+CFLAGS += -I$(VORTEX_RT_PATH)/include -I$(VORTEX_RT_PATH)/../hw
+
+LDFLAGS += -lm -Wl,-Bstatic,-T,$(VORTEX_RT_PATH)/linker/vx_link.ld -Wl,--gc-sections $(VORTEX_RT_PATH)/libvortexrt.a
+
+PROJECT = fibonacci
+
+SRCS = main.cpp
+
+all: $(PROJECT).elf $(PROJECT).hex $(PROJECT).dump
+
+$(PROJECT).dump: $(PROJECT).elf
+	$(DP) -D $(PROJECT).elf > $(PROJECT).dump
+
+$(PROJECT).hex: $(PROJECT).elf
+	$(CP) -O ihex $(PROJECT).elf $(PROJECT).hex
+
+$(PROJECT).elf: $(SRCS)
+	$(CC) $(CFLAGS) $(SRCS) $(LDFLAGS) -o $(PROJECT).elf
+
+run: $(PROJECT).hex
+	../../../hw/simulate/obj_dir/VVortex $(PROJECT).hex
+
+run-simx: $(PROJECT).hex
+	../../../simX/simX -a rv32i -i $(PROJECT).hex
+
+.depend: $(SRCS)
+	$(CC) $(CFLAGS) -MM $^ > .depend;
+
+clean:
+	rm -rf *.elf *.hex *.dump .depend 

tests/runtime/fibonacci/main.cpp

@@ -0,0 +1,32 @@
+#include <stdio.h>
+
+const int Num = 9;
+const int Ans = 34;
+
+int fibonacci(int n) {
+   if (n <= 1)
+      return n;
+   return fibonacci(n-1) + fibonacci(n-2);
+}
+
+int main() {
+	int errors = 0;
+
+	int fib = fibonacci(Num);
+	
+	printf("fibonacci(%d) = %d\n", Num, fib);
+
+	if (fib == Ans) {
+		printf("Passed!\n");
+	} else {
+		printf("Failed! value=%d, expected=%d\n", fib, Ans);
+		errors = 1;
+	}
+
+	return errors;
+}
+
+
+
+
+