update readme

README.md

@@ -6,14 +6,70 @@
 | -----------| -------------- | ---- | -------------------------- |
 | 0856009    | JingWangTW     | 王靖  | jingwang.cs08g@nctu.edu.tw |
 
-## LAB 2 Project
+## LAB 6 Project
 
-### How to build
+### Build
 ```bash
 make
 ```
 
 ### Run on QEMU
 ```bash
 make run 
+```
+
+### Clean and Rebuild Project
+```bash
+make force
+```
+
+### Run with Debugger
+```bash
+make debug
+
+# on the other shell
+aarch64-linux-gnu-gdb
+file build/kernel8.elf
+directory .
+target remote localhost:1234
+
+```
+
+## Directory structure
+```
+.
+├── LICENSE
+├── Makefile                # make file
+├── README.md
+├── include                 # header files
+│   ├── allocator.h         # header file for allocator.c
+│   ├── command.h
+│   ├── ctype.h
+│   ├── framebuffer.h
+│   ├── gpio.h
+│   ├── img_data.h
+│   ├── mailbox.h
+│   ├── math.h              # header file for math.c
+│   ├── mem.h               # header file for mem.c
+│   ├── shell.h
+│   ├── stdarg.h            # define stdarg
+│   ├── string.h
+│   ├── time.h
+│   ├── type.h              # define some common type
+│   └── uart.h
+├── link.ld
+└── src                     # source files
+    ├── allocator.c         # register for fixed-size, vaired-size allocator, allocate and free memory from the both allocator
+    ├── command.c
+    ├── ctype.c
+    ├── framebuffer.c
+    ├── mailbox.c
+    ├── main.c
+    ├── math.c
+    ├── mem.c               # buddy system
+    ├── shell.c
+    ├── start.S             # startup booting process
+    ├── string.c
+    ├── time.c
+    └── uart.c
 ```