diff --git a/hermit/include/hermit/syscall.h b/hermit/include/hermit/syscall.h
index 17095b7cc..448fa2555 100644
--- a/hermit/include/hermit/syscall.h
+++ b/hermit/include/hermit/syscall.h
@@ -66,7 +66,7 @@ tid_t sys_getpid(void);
 int sys_fork(void);
 int sys_wait(int* status);
 int sys_execve(const char* name, char * const * argv, char * const * env);
-int sys_getprio(void);
+int sys_getprio(tid_t* id);
 int sys_setprio(tid_t* id, int prio);
 void NORETURN sys_exit(int arg);
 ssize_t sys_read(int fd, char* buf, size_t len);
diff --git a/hermit/kernel/syscall.c b/hermit/kernel/syscall.c
index 8f5ab3d90..7afc241be 100644
--- a/hermit/kernel/syscall.c
+++ b/hermit/kernel/syscall.c
@@ -54,11 +54,13 @@ tid_t sys_getpid(void)
 	return task->id;
 }
 
-int sys_getprio(void)
+int sys_getprio(tid_t* id)
 {
 	task_t* task = per_core(current_task);
 
-	return task->prio;
+	if (!id || (task->id == *id))
+		return task->prio;
+	return -EINVAL;
 }
 
 int sys_setprio(tid_t* id, int prio)
diff --git a/hermit/usr/newlib b/hermit/usr/newlib
index a55fdd5a1..e56071244 160000
--- a/hermit/usr/newlib
+++ b/hermit/usr/newlib
@@ -1 +1 @@
-Subproject commit a55fdd5a1a7bb35130416c4b31244d9507cfc27e
+Subproject commit e56071244e43980b3ef46f571a533b62ff5874ab
diff --git a/hermit/usr/pte b/hermit/usr/pte
index bbf5f3916..78e35d6de 160000
--- a/hermit/usr/pte
+++ b/hermit/usr/pte
@@ -1 +1 @@
-Subproject commit bbf5f3916788d751776357115908173bb03c8f02
+Subproject commit 78e35d6ded9bd509a5a9febd2d54daf57b4b06a1