mikros: Add process wait support

library/std/src/sys/pal/mikros/process.rs

@@ -246,7 +246,11 @@ fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
 
 impl ExitStatus {
     pub fn exit_ok(&self) -> Result<(), ExitStatusError> {
-        if self.0 == 0 { Ok(()) } else { Err(ExitStatusError(self.0)) }
+        if self.0 == 0 {
+            Ok(())
+        } else {
+            Err(ExitStatusError(self.0))
+        }
     }
 
     pub fn code(&self) -> Option<i32> {
@@ -314,8 +318,7 @@ pub fn wait(&mut self) -> io::Result<ExitStatus> {
             return unsupported();
         };
         let wait_res: Result<(u64, u8), Errno> = postcard::from_bytes(
-            &rpc::send_call(proc_man_pid, 8, 5, &postcard::to_allocvec(&(self.pid, true)).unwrap())
-                .get_return(),
+            &rpc::send_call(proc_man_pid, 8, 5, &postcard::to_allocvec(&(self.pid, true)).unwrap()).get_return(),
         )
         .unwrap();
         let (_wait_pid, code) = wait_res?;
@@ -327,8 +330,7 @@ pub fn try_wait(&mut self) -> io::Result<Option<ExitStatus>> {
             return unsupported();
         };
         let wait_res: Result<(u64, u8), Errno> = postcard::from_bytes(
-            &rpc::send_call(proc_man_pid, 8, 5, &postcard::to_allocvec(&(self.pid, true)).unwrap())
-                .get_return(),
+            &rpc::send_call(proc_man_pid, 8, 5, &postcard::to_allocvec(&(self.pid, true)).unwrap()).get_return(),
         )
         .unwrap();
         let (_wait_pid, code) = match wait_res {

library/std/src/sys/pal/mikros/start.rs

@@ -13,6 +13,6 @@ pub extern "C" fn _start() {
     unsafe {
         asm!("int 0x80", in("rax") 19, lateout("rax") argv, lateout("rcx") argc);
         let code = main(argc, argv);
-        crate::sys::os::exit(code);
+        crate::sys::os::exit(code as u8);
     };
 }