Use saner debug IDs for kmain.

src/context/context.rs

@@ -185,9 +185,9 @@ impl Context {
             owner_proc_id,
 
             ens: 0.into(),
-            euid: u32::MAX,
-            egid: u32::MAX,
-            pid: usize::MAX,
+            euid: 0,
+            egid: 0,
+            pid: 0,
 
             #[cfg(feature = "syscall_debug")]
             syscall_debug_info: crate::syscall::debug::SyscallDebugInfo::default(),

src/context/mod.rs

@@ -76,7 +76,7 @@ pub fn init() {
     context.sched_affinity.atomic_set(crate::cpu_id());
 
     context.name.clear();
-    context.name.push_str("kmain");
+    context.name.push_str("[kmain]");
 
     self::arch::EMPTY_CR3.call_once(|| unsafe { RmmA::table(TableKind::User) });