exit

kernel/syscall/handler.cc

@@ -61,6 +61,8 @@ extern "C" size_t syscall_handler(size_t sysnum, size_t p1, size_t p2,
          case Syscall::ID::SEM_SIGNAL:
             Syscall::Skeleton::sem_signal(Guard::enter().vault(), p1);
             break;
+         case Syscall::ID::SYS_EXIT:
+            Syscall::Skeleton::exit(Guard::enter().vault());
  
      }
 

kernel/syscall/skeleton.cc

@@ -97,7 +97,9 @@ bool sem_wait(Vault &vault, size_t id) {
   return true;
 }
 
-void exit(Vault &vault) { (void)vault; }
+void exit(Vault &vault) {
+    vault.scheduler.exit();
+}
 
 }  // namespace Skeleton
 }  // namespace Syscall

kernel/syscall/stub.h

@@ -15,7 +15,7 @@ enum class ID : size_t {
     SEM_WAIT=6,
     SEM_SIGNAL=7,
     //SYS_GETPID=8,
-    //SYS_EXIT= 9,
+    SYS_EXIT= 9,
     //SYS_KILL=10
 };
 }  // namespace Syscall
@@ -59,3 +59,7 @@ extern "C" ssize_t sys_safe_call(Syscall::ID id, size_t p1, size_t p2,
   return sys_call(Syscall::ID::SEM_SIGNAL, fd, semid,0,0,0);
 }
 
+[[gnu::always_inline]] static inline void sys_exit(){
+    sys_call(Syscall::ID::SYS_EXIT, 0, 0, 0, 0, 0);
+}
+

kernel/user/app1/appl.cc

@@ -25,8 +25,10 @@ void Application::action() {  // NOLINT
 	char text[] = "testX";
 	text[4] = 0x30+id;
 
-	for (unsigned i = 0;; ++i) {
+	for (unsigned i = 1;; ++i) {
 		write(0, text, sizeof(text));
+		if(i==id)
+			sys_exit();
 		sleep(1000);
 	}
 }