diff --git a/.gitignore b/.gitignore
index 9565562..4ccad4e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,3 +7,5 @@ cscope.*
 ncscope.*
 tags
 *swp
+.cproject
+.project
diff --git a/labcodes_answer/lab1_result/Makefile b/labcodes_answer/lab1_result/Makefile
index 62701cb..e770c79 100644
--- a/labcodes_answer/lab1_result/Makefile
+++ b/labcodes_answer/lab1_result/Makefile
@@ -152,6 +152,7 @@ $(bootblock): $(call toobj,$(bootfiles)) | $(call totarget,sign)
 	@echo + ld $@
 	$(V)$(LD) $(LDFLAGS) -N -e start -Ttext 0x7C00 $^ -o $(call toobj,bootblock)
 	@$(OBJDUMP) -S $(call objfile,bootblock) > $(call asmfile,bootblock)
+	@$(OBJDUMP) -t $(call objfile,bootblock) | $(SED) '1,/SYMBOL TABLE/d; s/ .* / /; /^$$/d' > $(call symfile,bootblock)
 	@$(OBJCOPY) -S -O binary $(call objfile,bootblock) $(call outfile,bootblock)
 	@$(call totarget,sign) $(call outfile,bootblock) $(bootblock)
 
@@ -193,7 +194,7 @@ endif
 # files for grade script
 
 TARGETS: $(TARGETS)
-
+all: $(TARGETS)
 .DEFAULT_GOAL := TARGETS
 
 .PHONY: qemu qemu-nox debug debug-nox
@@ -214,10 +215,12 @@ qemu: $(UCOREIMG)
 qemu-nox: $(UCOREIMG)
 	$(V)$(QEMU) -serial mon:stdio -hda $< -nographic
 TERMINAL        :=gnome-terminal
+gdb: $(UCOREIMG)
+	$(V)$(QEMU) -S -s -parallel stdio -hda $< -serial null &
 debug: $(UCOREIMG)
 	$(V)$(QEMU) -S -s -parallel stdio -hda $< -serial null &
 	$(V)sleep 2
-	$(V)$(TERMINAL) -e "gdb -q -x tools/gdbinit"
+	$(V)$(TERMINAL)  --full-screen -e "gdb -tui -q -x tools/gdbinit"
 	
 debug-nox: $(UCOREIMG)
 	$(V)$(QEMU) -S -s -serial mon:stdio -hda $< -nographic &
diff --git a/labcodes_answer/lab1_result/boot/bootmain.c b/labcodes_answer/lab1_result/boot/bootmain.c
index 4b55eb7..cb63508 100644
--- a/labcodes_answer/lab1_result/boot/bootmain.c
+++ b/labcodes_answer/lab1_result/boot/bootmain.c
@@ -29,9 +29,8 @@
  *
  *  * bootmain() in this file takes over, reads in the kernel and jumps to it.
  * */
-
-#define SECTSIZE        512
-#define ELFHDR          ((struct elfhdr *)0x10000)      // scratch space
+unsigned int    SECTSIZE  =      512 ;
+struct elfhdr * ELFHDR    =      ((struct elfhdr *)0x10000) ;     // scratch space
 
 /* waitdisk - wait for disk ready */
 static void
diff --git a/labcodes_answer/lab1_result/kern/init/init.c b/labcodes_answer/lab1_result/kern/init/init.c
index 5e13746..2cd8120 100644
--- a/labcodes_answer/lab1_result/kern/init/init.c
+++ b/labcodes_answer/lab1_result/kern/init/init.c
@@ -9,12 +9,12 @@
 #include <intr.h>
 #include <pmm.h>
 #include <kmonitor.h>
-int kern_init(void) __attribute__((noreturn));
+void kern_init(void) __attribute__((noreturn));
 void grade_backtrace(void);
 static void lab1_switch_test(void);
 
-int
-kern_init(void) {
+void
+kern_init(void){
     extern char edata[], end[];
     memset(edata, 0, end - edata);
 
diff --git a/labcodes_answer/lab1_result/tools/gdbinit b/labcodes_answer/lab1_result/tools/gdbinit
index abf6161..bbeb8aa 100644
--- a/labcodes_answer/lab1_result/tools/gdbinit
+++ b/labcodes_answer/lab1_result/tools/gdbinit
@@ -1,4 +1,6 @@
 file bin/kernel
+file obj/bootblock.o
 target remote :1234
+break bootmain
 break kern_init
-continue
\ No newline at end of file
+continue