Merge pull request hermit-os#1467 from hermit-os/exit_code_message

feat: add stable exit code message in non-Uhyve VMs

src/syscalls/interfaces/mod.rs

@@ -49,6 +49,9 @@ pub trait SyscallInterface: Send + Sync {
 	}
 
 	fn shutdown(&self, error_code: i32) -> ! {
+		// This is a stable message used for detecting exit codes for different hypervisors.
+		println!("exit status {error_code}");
+
 		arch::processor::shutdown(error_code)
 	}
 }

src/syscalls/mod.rs

@@ -281,7 +281,6 @@ pub(crate) fn get_application_parameters() -> (i32, *const *const u8, *const *co
 pub(crate) fn shutdown(arg: i32) -> ! {
 	// print some performance statistics
 	crate::arch::kernel::print_statistics();
-	info!("shutting down with code {arg}");
 
 	SYS.shutdown(arg)
 }