Implements direct match for RegMgr::decode_key() (#341)

src/kernel/src/main.rs

@@ -30,6 +30,7 @@ mod rtld;
 mod signal;
 mod syscalls;
 mod sysctl;
+mod ucred;
 
 fn main() -> ExitCode {
     log::init();

src/kernel/src/process/mod.rs

@@ -2,6 +2,7 @@ pub use self::appinfo::*;
 pub use self::rlimit::*;
 pub use self::thread::*;
 
+use crate::ucred::Ucred;
 use gmtx::{GroupMutex, MutexGroup};
 use llt::{SpawnError, Thread};
 use std::num::NonZeroI32;
@@ -72,7 +73,7 @@ impl VProc {
         // Lock the list before spawn the thread to prevent race condition if the new thread run
         // too fast and found out they is not in our list.
         let mut threads = self.threads.write();
-        let td = Arc::new(VThread::new(Self::new_id(), &self.mtxg));
+        let td = Arc::new(VThread::new(Self::new_id(), Ucred::new(), &self.mtxg));
         let active = Box::new(ActiveThread {
             proc: self,
             id: td.id(),

src/kernel/src/process/thread.rs

@@ -1,4 +1,5 @@
 use crate::signal::SignalSet;
+use crate::ucred::Ucred;
 use gmtx::{GroupMutex, GroupMutexWriteGuard, MutexGroup};
 use llt::{SpawnError, Thread};
 use std::num::NonZeroI32;
@@ -11,14 +12,16 @@ use tls::{Local, Tls};
 #[derive(Debug)]
 pub struct VThread {
     id: NonZeroI32,                 // td_tid
+    cred: Ucred,                    // td_ucred
     sigmask: GroupMutex<SignalSet>, // td_sigmask
 }
 
 impl VThread {
-    pub(super) fn new(id: NonZeroI32, mtxg: &Arc<MutexGroup>) -> Self {
+    pub(super) fn new(id: NonZeroI32, cred: Ucred, mtxg: &Arc<MutexGroup>) -> Self {
         // TODO: Check how the PS4 actually allocate the thread ID.
         Self {
             id,
+            cred,
             sigmask: mtxg.new_member(SignalSet::default()),
         }
     }
@@ -33,6 +36,10 @@ impl VThread {
         self.id
     }
 
+    pub fn cred(&self) -> &Ucred {
+        &self.cred
+    }
+
     pub fn sigmask_mut(&self) -> GroupMutexWriteGuard<'_, SignalSet> {
         self.sigmask.write()
     }