diff --git a/ch1/src/entry.asm b/ch1/src/entry.asm
index cd24d76..f790219 100644
--- a/ch1/src/entry.asm
+++ b/ch1/src/entry.asm
@@ -1,7 +1,7 @@
 .section .text.entry
 .globl _start  // 声明_start是全局符号
 _start:
-    la sp, boot_stack_top
+    la sp, boot_stack_top_bound
     call rust_main
 
 
@@ -9,7 +9,7 @@ _start:
 // 声明栈空间 后续 .bss.stack 会被link脚本链接到 .bss段
     .section .bss.stack
     .globl boot_stack_lower_bound  // 栈低地址公开为全局符号
-    .globl boot_stack_top  // 栈高地址公开为全局符号
+    .globl boot_stack_top_bound  // 栈高地址公开为全局符号
 boot_stack_lower_bound:
     .space 4096 * 16
-boot_stack_top:
+boot_stack_top_bound:
diff --git a/ch1/src/main.rs b/ch1/src/main.rs
index ed9307f..bcbe1e2 100644
--- a/ch1/src/main.rs
+++ b/ch1/src/main.rs
@@ -17,14 +17,17 @@ extern "C" {
     fn etext();
     fn sbss();
     fn ebss();
+    fn boot_stack_top_bound();
+    fn boot_stack_lower_bound();
 }
 
 #[no_mangle]
 pub fn rust_main(){
     init_bss();
 
-
     println!("stext: {:#x}, etext: {:#x}", stext as usize, etext as usize);
+    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");
 }