diff --git a/ch2/os/Cargo.toml b/ch2/os/Cargo.toml
index c02e785..dd3234d 100644
--- a/ch2/os/Cargo.toml
+++ b/ch2/os/Cargo.toml
@@ -7,4 +7,8 @@ edition = "2021"
 
 # 设置release模式下保存调试信息
 [profile.release]
-debug=true
\ No newline at end of file
+debug=true
+
+[dependencies]
+riscv = { git = "https://github.com/rcore-os/riscv", features = ["inline-asm"] }
+lazy_static = { version = "1.4.0", features = ["spin_no_std"] }
\ No newline at end of file
diff --git a/ch2/os/src/batch.rs b/ch2/os/src/batch.rs
new file mode 100644
index 0000000..c8c4d72
--- /dev/null
+++ b/ch2/os/src/batch.rs
@@ -0,0 +1,72 @@
+use lazy_static::*;
+use crate::println;
+use crate::sync::UPSafeCell;
+
+const USER_STACK_SIZE: usize = 4096 * 2;  // 栈大小为8kb
+const KERNEL_STACK_SIZE: usize = 4096 * 2;
+
+const MAX_APP_NUM: usize = 16;  // 系统最大支持的运行程序数量
+
+const APP_BASE_ADDRESS: usize = 0x80400000;  // 载入的app的起始的地址
+const APP_SIZE_LIMIT: usize = 0x20000;  // app的最大的二进制文件能够使用的大小
+
+// 在此之后应用使用UserStack, 而内核使用KernelStack, entry.asm设置的64k启动栈不再被使用
+static KERNEL_STACK: [u8; KERNEL_STACK_SIZE] = [0; KERNEL_STACK_SIZE];
+static USER_STACK: [u8; USER_STACK_SIZE] = [0; USER_STACK_SIZE];
+
+lazy_static! {
+    static ref APP_MANAGER: UPSafeCell<AppManager> = unsafe {
+        UPSafeCell::new({
+            extern "C" {
+                fn _num_app();
+            }
+            let num_app_ptr = _num_app as usize as *const usize;
+            let num_app = num_app_ptr.read_volatile();  // 用户app的总数量
+
+            let mut app_start_lis: [usize; MAX_APP_NUM + 1] = [0; MAX_APP_NUM + 1];  // 创建一个数组, 用来保存每个app的起始位置
+
+            // 得到每个app的起始地址
+            let mut app_start_lis: [usize; MAX_APP_NUM + 1] = [0; MAX_APP_NUM + 1];
+            let app_start_raw: &[usize] =
+                core::slice::from_raw_parts(num_app_ptr.add(1), num_app + 1);
+            app_start_lis[..=num_app].copy_from_slice(app_start_raw);
+
+            AppManager{
+                num_app,
+                current_app: 0,
+                app_start_lis
+            }
+        })
+    };
+}
+
+// 由build.rs 生成的link_app.S, 根据里面的信息生成的结构体
+struct AppManager {
+    num_app: usize,  // 用户app数量
+    current_app: usize,  // 当前需要执行的第几个app
+    app_start_lis: [usize; MAX_APP_NUM + 1],  // 保存了每个app的起始位置, 后面会跳到这里, +1 是因为end的位置也占了一个usize, 需要知道end的位置
+}
+
+impl AppManager{
+    fn show_app_info(&self){
+        println!("[kernel] num_app = {}", self.num_app);
+        for i in 0..self.num_app {
+            println!(
+                "[kernel] app_{} [{:#x}, {:#x})",
+                i,
+                self.app_start_lis[i],
+                self.app_start_lis[i + 1]
+            );
+        }
+    }
+}
+
+
+pub fn init() {
+    APP_MANAGER.exclusive_access().show_app_info();
+}
+
+
+
+
+
diff --git a/ch2/os/src/main.rs b/ch2/os/src/main.rs
index bcbe1e2..4933aed 100644
--- a/ch2/os/src/main.rs
+++ b/ch2/os/src/main.rs
@@ -6,12 +6,17 @@ use core::arch::global_asm;
 use sbi::{console_put_char, shutdown};
 use lang_items::console;
 
-mod lang_items;
-mod sbi;
+pub mod lang_items;
+pub mod sbi;
+pub mod batch;
+pub mod sync;
 
 // 汇编脚本引入, 调整内核的内存布局之后, 会跳入到 rust_main中执行
 global_asm!(include_str!("entry.asm"));
 
+// 引入用户的二进制文件
+global_asm!(include_str!("link_app.S"));
+
 extern "C" {
     fn stext();
     fn etext();
@@ -29,7 +34,7 @@ pub fn rust_main(){
     println!("sbss: {:#x}, ebss: {:#x}", sbss as usize, ebss as usize);
     println!("boot_stack_top_bound: {:#x}, boot_stack_lower_bound: {:#x}", boot_stack_top_bound as usize, boot_stack_lower_bound as usize);
 
-    panic!("my panic");
+    batch::init();
 }
 
 /// ## 初始化bss段