Working on app data auto linking.

os/src/main.rs

@@ -8,9 +8,11 @@
 mod console;
 mod lang_items;
 mod sbi;
-
+mod syscall;
+mod trap;
 
 global_asm!(include_str!("entry.asm"));
+global_asm!(include_str!("link_app.S"));
 
 fn clear_bss() {
     extern "C" {
@@ -25,23 +27,11 @@ fn clear_bss() {
 #[no_mangle]
 pub fn rust_main() -> ! {
     extern "C" {
-        fn stext();
-        fn etext();
-        fn srodata();
-        fn erodata();
-        fn sdata();
-        fn edata();
-        fn sbss();
-        fn ebss();
-        fn boot_stack();
-        fn boot_stack_top();
+        fn app_0_start();
+        fn app_0_end();
     };
     clear_bss();
     println!("Hello, world!");
-    println!(".text [{:#x}, {:#x})", stext as usize, etext as usize);
-    println!(".rodata [{:#x}, {:#x})", srodata as usize, erodata as usize);
-    println!(".data [{:#x}, {:#x})", sdata as usize, edata as usize);
-    println!("boot_stack [{:#x}, {:#x})", boot_stack as usize, boot_stack_top as usize);
-    println!(".bss [{:#x}, {:#x})", sbss as usize, ebss as usize);
+    println!("app_0 [{:#x}, {:#x})", app_0_start as usize, app_0_end as usize);
     panic!("Shutdown machine!");
 }

os/src/syscall/mod.rs

@@ -0,0 +1,2 @@
+const SYSCALL_WRITE: usize = 64;
+