fix hello-world init

hello-world/Makefile

@@ -2,14 +2,22 @@
 TARGET  = hello
 C_SRCS  = $(wildcard *.c) 
 #HEADERS = $(wildcard *.h)
-#CFLAGS += -O2 
+CFLAGS += -g 
 
 BOARD=freedom-e300-hifive1
 LINK_TARGET=flash
 RISCV_ARCH:=rv32i
 RISCV_ABI:=ilp32
-LDFLAGS := -Wl,--wrap=scanf -Wl,--wrap=printf -march=$(RISCV_ARCH) -mabi=$(RISCV_ABI)
+LDFLAGS := -Wl,--wrap=scanf -Wl,--wrap=printf -march=$(RISCV_ARCH) -mabi=$(RISCV_ABI) -g
+
+#TOOL_DIR?=/opt/shared/riscv/FreedomStudio/20180122/SiFive/riscv64-unknown-elf-gcc-20171231-x86_64-linux-centos6/bin
+TOOL_DIR=/opt/shared/riscv/tools/Ubuntu/riscv64-unknown-elf-gcc-8.3.0-2020.04.1-x86_64-linux-ubuntu14/bin
 
-TOOL_DIR?=/opt/shared/riscv/FreedomStudio/20180122/SiFive/riscv64-unknown-elf-gcc-20171231-x86_64-linux-centos6/bin
 BSP_BASE = ./bsp
 include $(BSP_BASE)/env/common.mk
+
+.PHONY: all
+all: $(TARGET).dump
+
+$(TARGET).dump: $(TARGET)
+	$(TOOL_DIR)/$(TRIPLET)-objdump -d -S -C $< > $@

hello-world/bsp/env/start.S

@@ -75,7 +75,7 @@ _start:
 #else
 	sd ra, 8(sp)
 #endif
-
+        call _init
 	/* argc = argv = 0 */
 	li a0, 0
 	li a1, 0