diff --git a/core/java/android/app/AppOpsManager.java b/core/java/android/app/AppOpsManager.java
index 64054c5..3e4795c 100644
--- a/core/java/android/app/AppOpsManager.java
+++ b/core/java/android/app/AppOpsManager.java
@@ -575,6 +575,10 @@
         }
     }
 
+    private String buildSecurityExceptionMsg(int op, int uid, String packageName) {
+        return packageName + " from uid " + uid + " not allowed to perform " + sOpNames[op];
+    }
+
     /**
      * Do a quick check for whether an application might be able to perform an operation.
      * This is <em>not</em> a security check; you must use {@link #noteOp(int, int, String)}
@@ -595,7 +599,7 @@
         try {
             int mode = mService.checkOperation(op, uid, packageName);
             if (mode == MODE_ERRORED) {
-                throw new SecurityException("Operation not allowed");
+                throw new SecurityException(buildSecurityExceptionMsg(op, uid, packageName));
             }
             return mode;
         } catch (RemoteException e) {
@@ -650,7 +654,7 @@
         try {
             int mode = mService.noteOperation(op, uid, packageName);
             if (mode == MODE_ERRORED) {
-                throw new SecurityException("Operation not allowed");
+                throw new SecurityException(buildSecurityExceptionMsg(op, uid, packageName));
             }
             return mode;
         } catch (RemoteException e) {
@@ -672,7 +676,7 @@
 
     /** @hide */
     public int noteOp(int op) {
-        return noteOp(op, Process.myUid(), mContext.getBasePackageName());
+        return noteOp(op, Process.myUid(), mContext.getOpPackageName());
     }
 
     /** @hide */
@@ -710,7 +714,7 @@
         try {
             int mode = mService.startOperation(getToken(mService), op, uid, packageName);
             if (mode == MODE_ERRORED) {
-                throw new SecurityException("Operation not allowed");
+                throw new SecurityException(buildSecurityExceptionMsg(op, uid, packageName));
             }
             return mode;
         } catch (RemoteException e) {
@@ -732,7 +736,7 @@
 
     /** @hide */
     public int startOp(int op) {
-        return startOp(op, Process.myUid(), mContext.getBasePackageName());
+        return startOp(op, Process.myUid(), mContext.getOpPackageName());
     }
 
     /**
@@ -749,6 +753,6 @@
     }
 
     public void finishOp(int op) {
-        finishOp(op, Process.myUid(), mContext.getBasePackageName());
+        finishOp(op, Process.myUid(), mContext.getOpPackageName());
     }
 }
diff --git a/core/java/android/app/ApplicationPackageManager.java b/core/java/android/app/ApplicationPackageManager.java
index ab2739d..e522b78 100644
--- a/core/java/android/app/ApplicationPackageManager.java
+++ b/core/java/android/app/ApplicationPackageManager.java
@@ -1275,7 +1275,7 @@
                                              int newState, int flags) {
         try {
             mPM.setApplicationEnabledSetting(packageName, newState, flags,
-                    mContext.getUserId(), mContext.getBasePackageName());
+                    mContext.getUserId(), mContext.getOpPackageName());
         } catch (RemoteException e) {
             // Should never happen!
         }
diff --git a/core/java/android/app/ContextImpl.java b/core/java/android/app/ContextImpl.java
index 7ff7562..fe8c506 100644
--- a/core/java/android/app/ContextImpl.java
+++ b/core/java/android/app/ContextImpl.java
@@ -183,6 +183,7 @@
 
     /*package*/ LoadedApk mPackageInfo;
     private String mBasePackageName;
+    private String mOpPackageName;
     private Resources mResources;
     /*package*/ ActivityThread mMainThread;
     private Context mOuterContext;
@@ -679,6 +680,12 @@
         return mBasePackageName != null ? mBasePackageName : getPackageName();
     }
 
+    /** @hide */
+    @Override
+    public String getOpPackageName() {
+        return mOpPackageName != null ? mOpPackageName : getBasePackageName();
+    }
+
     @Override
     public ApplicationInfo getApplicationInfo() {
         if (mPackageInfo != null) {
@@ -1961,6 +1968,7 @@
     public ContextImpl(ContextImpl context) {
         mPackageInfo = context.mPackageInfo;
         mBasePackageName = context.mBasePackageName;
+        mOpPackageName = context.mOpPackageName;
         mResources = context.mResources;
         mMainThread = context.mMainThread;
         mContentResolver = context.mContentResolver;
@@ -1977,7 +1985,21 @@
     final void init(LoadedApk packageInfo, IBinder activityToken, ActivityThread mainThread,
             Resources container, String basePackageName, UserHandle user) {
         mPackageInfo = packageInfo;
-        mBasePackageName = basePackageName != null ? basePackageName : packageInfo.mPackageName;
+        if (basePackageName != null) {
+            mBasePackageName = mOpPackageName = basePackageName;
+        } else {
+            mBasePackageName = packageInfo.mPackageName;
+            ApplicationInfo ainfo = packageInfo.getApplicationInfo();
+            if (ainfo.uid == Process.SYSTEM_UID && ainfo.uid != Process.myUid()) {
+                // Special case: system components allow themselves to be loaded in to other
+                // processes.  For purposes of app ops, we must then consider the context as
+                // belonging to the package of this process, not the system itself, otherwise
+                // the package+uid verifications in app ops will fail.
+                mOpPackageName = ActivityThread.currentPackageName();
+            } else {
+                mOpPackageName = mBasePackageName;
+            }
+        }
         mResources = mPackageInfo.getResources(mainThread);
         mResourcesManager = ResourcesManager.getInstance();
 
@@ -2011,6 +2033,7 @@
     final void init(Resources resources, ActivityThread mainThread, UserHandle user) {
         mPackageInfo = null;
         mBasePackageName = null;
+        mOpPackageName = null;
         mResources = resources;
         mMainThread = mainThread;
         mContentResolver = new ApplicationContentResolver(this, mainThread, user);
diff --git a/core/java/android/app/NotificationManager.java b/core/java/android/app/NotificationManager.java
index dbafc78..3ee4306 100644
--- a/core/java/android/app/NotificationManager.java
+++ b/core/java/android/app/NotificationManager.java
@@ -133,7 +133,7 @@
         }
         if (localLOGV) Log.v(TAG, pkg + ": notify(" + id + ", " + notification + ")");
         try {
-            service.enqueueNotificationWithTag(pkg, mContext.getBasePackageName(), tag, id,
+            service.enqueueNotificationWithTag(pkg, mContext.getOpPackageName(), tag, id,
                     notification, idOut, UserHandle.myUserId());
             if (id != idOut[0]) {
                 Log.w(TAG, "notify: id corrupted: sent " + id + ", got back " + idOut[0]);
@@ -158,7 +158,7 @@
         }
         if (localLOGV) Log.v(TAG, pkg + ": notify(" + id + ", " + notification + ")");
         try {
-            service.enqueueNotificationWithTag(pkg, mContext.getBasePackageName(), tag, id,
+            service.enqueueNotificationWithTag(pkg, mContext.getOpPackageName(), tag, id,
                     notification, idOut, user.getIdentifier());
             if (id != idOut[0]) {
                 Log.w(TAG, "notify: id corrupted: sent " + id + ", got back " + idOut[0]);
diff --git a/core/java/android/content/ClipboardManager.java b/core/java/android/content/ClipboardManager.java
index 69f9d4a..73e6fd0 100644
--- a/core/java/android/content/ClipboardManager.java
+++ b/core/java/android/content/ClipboardManager.java
@@ -122,7 +122,7 @@
             if (clip != null) {
                 clip.prepareToLeaveProcess();
             }
-            getService().setPrimaryClip(clip, mContext.getBasePackageName());
+            getService().setPrimaryClip(clip, mContext.getOpPackageName());
         } catch (RemoteException e) {
         }
     }
@@ -132,7 +132,7 @@
      */
     public ClipData getPrimaryClip() {
         try {
-            return getService().getPrimaryClip(mContext.getBasePackageName());
+            return getService().getPrimaryClip(mContext.getOpPackageName());
         } catch (RemoteException e) {
             return null;
         }
@@ -144,7 +144,7 @@
      */
     public ClipDescription getPrimaryClipDescription() {
         try {
-            return getService().getPrimaryClipDescription(mContext.getBasePackageName());
+            return getService().getPrimaryClipDescription(mContext.getOpPackageName());
         } catch (RemoteException e) {
             return null;
         }
@@ -155,7 +155,7 @@
      */
     public boolean hasPrimaryClip() {
         try {
-            return getService().hasPrimaryClip(mContext.getBasePackageName());
+            return getService().hasPrimaryClip(mContext.getOpPackageName());
         } catch (RemoteException e) {
             return false;
         }
@@ -166,7 +166,7 @@
             if (mPrimaryClipChangedListeners.size() == 0) {
                 try {
                     getService().addPrimaryClipChangedListener(
-                            mPrimaryClipChangedServiceListener, mContext.getBasePackageName());
+                            mPrimaryClipChangedServiceListener, mContext.getOpPackageName());
                 } catch (RemoteException e) {
                 }
             }
@@ -213,7 +213,7 @@
      */
     public boolean hasText() {
         try {
-            return getService().hasClipboardText(mContext.getBasePackageName());
+            return getService().hasClipboardText(mContext.getOpPackageName());
         } catch (RemoteException e) {
             return false;
         }
diff --git a/core/java/android/content/ContentResolver.java b/core/java/android/content/ContentResolver.java
index e914604..995ca97 100644
--- a/core/java/android/content/ContentResolver.java
+++ b/core/java/android/content/ContentResolver.java
@@ -261,7 +261,7 @@
 
     public ContentResolver(Context context) {
         mContext = context != null ? context : ActivityThread.currentApplication();
-        mPackageName = mContext.getBasePackageName();
+        mPackageName = mContext.getOpPackageName();
     }
 
     /** @hide */
diff --git a/core/java/android/content/Context.java b/core/java/android/content/Context.java
index 8df5bee..7b15e63 100644
--- a/core/java/android/content/Context.java
+++ b/core/java/android/content/Context.java
@@ -435,6 +435,13 @@
     /** @hide Return the name of the base context this context is derived from. */
     public abstract String getBasePackageName();
 
+    /** @hide Return the package name that should be used for app ops calls from
+     * this context.  This is the same as {@link #getBasePackageName()} except in
+     * cases where system components are loaded into other app processes, in which
+     * case this will be the name of the primary package in that process (so that app
+     * ops uid verification will work with the name). */
+    public abstract String getOpPackageName();
+
     /** Return the full application info for this context's package. */
     public abstract ApplicationInfo getApplicationInfo();
 
diff --git a/core/java/android/content/ContextWrapper.java b/core/java/android/content/ContextWrapper.java
index e09d367..a708dad 100644
--- a/core/java/android/content/ContextWrapper.java
+++ b/core/java/android/content/ContextWrapper.java
@@ -141,6 +141,12 @@
         return mBase.getBasePackageName();
     }
 
+    /** @hide */
+    @Override
+    public String getOpPackageName() {
+        return mBase.getOpPackageName();
+    }
+
     @Override
     public ApplicationInfo getApplicationInfo() {
         return mBase.getApplicationInfo();
diff --git a/core/java/android/os/PowerManager.java b/core/java/android/os/PowerManager.java
index 52e5f38..5e0d489 100644
--- a/core/java/android/os/PowerManager.java
+++ b/core/java/android/os/PowerManager.java
@@ -407,7 +407,7 @@
      */
     public WakeLock newWakeLock(int levelAndFlags, String tag) {
         validateWakeLockParameters(levelAndFlags, tag);
-        return new WakeLock(levelAndFlags, tag, mContext.getBasePackageName());
+        return new WakeLock(levelAndFlags, tag, mContext.getOpPackageName());
     }
 
     /** @hide */
diff --git a/core/java/android/os/SystemVibrator.java b/core/java/android/os/SystemVibrator.java
index e66fb28..700f80d 100644
--- a/core/java/android/os/SystemVibrator.java
+++ b/core/java/android/os/SystemVibrator.java
@@ -39,7 +39,7 @@
     }
 
     public SystemVibrator(Context context) {
-        mPackageName = context.getBasePackageName();
+        mPackageName = context.getOpPackageName();
         mService = IVibratorService.Stub.asInterface(
                 ServiceManager.getService("vibrator"));
     }
diff --git a/media/java/android/media/AudioManager.java b/media/java/android/media/AudioManager.java
index 1dcf0e9..d1f7156 100644
--- a/media/java/android/media/AudioManager.java
+++ b/media/java/android/media/AudioManager.java
@@ -551,10 +551,10 @@
         IAudioService service = getService();
         try {
             if (mUseMasterVolume) {
-                service.adjustMasterVolume(direction, flags, mContext.getBasePackageName());
+                service.adjustMasterVolume(direction, flags, mContext.getOpPackageName());
             } else {
                 service.adjustStreamVolume(streamType, direction, flags,
-                        mContext.getBasePackageName());
+                        mContext.getOpPackageName());
             }
         } catch (RemoteException e) {
             Log.e(TAG, "Dead object in adjustStreamVolume", e);
@@ -582,9 +582,9 @@
         IAudioService service = getService();
         try {
             if (mUseMasterVolume) {
-                service.adjustMasterVolume(direction, flags, mContext.getBasePackageName());
+                service.adjustMasterVolume(direction, flags, mContext.getOpPackageName());
             } else {
-                service.adjustVolume(direction, flags, mContext.getBasePackageName());
+                service.adjustVolume(direction, flags, mContext.getOpPackageName());
             }
         } catch (RemoteException e) {
             Log.e(TAG, "Dead object in adjustVolume", e);
@@ -612,10 +612,10 @@
         IAudioService service = getService();
         try {
             if (mUseMasterVolume) {
-                service.adjustMasterVolume(direction, flags, mContext.getBasePackageName());
+                service.adjustMasterVolume(direction, flags, mContext.getOpPackageName());
             } else {
                 service.adjustSuggestedStreamVolume(direction, suggestedStreamType, flags,
-                        mContext.getBasePackageName());
+                        mContext.getOpPackageName());
             }
         } catch (RemoteException e) {
             Log.e(TAG, "Dead object in adjustSuggestedStreamVolume", e);
@@ -634,7 +634,7 @@
     public void adjustMasterVolume(int steps, int flags) {
         IAudioService service = getService();
         try {
-            service.adjustMasterVolume(steps, flags, mContext.getBasePackageName());
+            service.adjustMasterVolume(steps, flags, mContext.getOpPackageName());
         } catch (RemoteException e) {
             Log.e(TAG, "Dead object in adjustMasterVolume", e);
         }
@@ -786,9 +786,9 @@
         IAudioService service = getService();
         try {
             if (mUseMasterVolume) {
-                service.setMasterVolume(index, flags, mContext.getBasePackageName());
+                service.setMasterVolume(index, flags, mContext.getOpPackageName());
             } else {
-                service.setStreamVolume(streamType, index, flags, mContext.getBasePackageName());
+                service.setStreamVolume(streamType, index, flags, mContext.getOpPackageName());
             }
         } catch (RemoteException e) {
             Log.e(TAG, "Dead object in setStreamVolume", e);
@@ -854,7 +854,7 @@
     public void setMasterVolume(int index, int flags) {
         IAudioService service = getService();
         try {
-            service.setMasterVolume(index, flags, mContext.getBasePackageName());
+            service.setMasterVolume(index, flags, mContext.getOpPackageName());
         } catch (RemoteException e) {
             Log.e(TAG, "Dead object in setMasterVolume", e);
         }
@@ -1569,7 +1569,7 @@
         IAudioService service = getService();
         try {
             service.adjustLocalOrRemoteStreamVolume(streamType, direction,
-                    mContext.getBasePackageName());
+                    mContext.getOpPackageName());
         } catch (RemoteException e) {
             Log.e(TAG, "Dead object in adjustLocalOrRemoteStreamVolume", e);
         }
@@ -1996,7 +1996,7 @@
         try {
             status = service.requestAudioFocus(streamType, durationHint, mICallBack,
                     mAudioFocusDispatcher, getIdForAudioFocusListener(l),
-                    mContext.getBasePackageName() /* package name */);
+                    mContext.getOpPackageName() /* package name */);
         } catch (RemoteException e) {
             Log.e(TAG, "Can't call requestAudioFocus() on AudioService due to "+e);
         }
@@ -2018,7 +2018,7 @@
         try {
             service.requestAudioFocus(streamType, durationHint, mICallBack, null,
                     MediaFocusControl.IN_VOICE_COMM_FOCUS_ID,
-                    mContext.getBasePackageName());
+                    mContext.getOpPackageName());
         } catch (RemoteException e) {
             Log.e(TAG, "Can't call requestAudioFocusForCall() on AudioService due to "+e);
         }
diff --git a/policy/src/com/android/internal/policy/impl/PhoneWindowManager.java b/policy/src/com/android/internal/policy/impl/PhoneWindowManager.java
index 27bf38cc..8a285e3 100644
--- a/policy/src/com/android/internal/policy/impl/PhoneWindowManager.java
+++ b/policy/src/com/android/internal/policy/impl/PhoneWindowManager.java
@@ -3637,7 +3637,7 @@
                             ? AudioManager.ADJUST_RAISE
                             : AudioManager.ADJUST_LOWER,
                     0,
-                    mContext.getBasePackageName());
+                    mContext.getOpPackageName());
         } catch (RemoteException e) {
             Log.w(TAG, "IAudioService.adjustStreamVolume() threw RemoteException " + e);
         } finally {
@@ -4964,7 +4964,7 @@
             owningPackage = win.getOwningPackage();
         } else {
             owningUid = android.os.Process.myUid();
-            owningPackage = mContext.getBasePackageName();
+            owningPackage = mContext.getOpPackageName();
         }
         if (pattern.length == 1) {
             // One-shot vibration
diff --git a/telephony/java/android/telephony/TelephonyManager.java b/telephony/java/android/telephony/TelephonyManager.java
index 40201ad..7d8b64f 100644
--- a/telephony/java/android/telephony/TelephonyManager.java
+++ b/telephony/java/android/telephony/TelephonyManager.java
@@ -309,7 +309,7 @@
      */
     public List<NeighboringCellInfo> getNeighboringCellInfo() {
         try {
-            return getITelephony().getNeighboringCellInfo(mContext.getBasePackageName());
+            return getITelephony().getNeighboringCellInfo(mContext.getOpPackageName());
         } catch (RemoteException ex) {
             return null;
         } catch (NullPointerException ex) {
diff --git a/test-runner/src/android/test/mock/MockContext.java b/test-runner/src/android/test/mock/MockContext.java
index 252a14e..0d9cd18 100644
--- a/test-runner/src/android/test/mock/MockContext.java
+++ b/test-runner/src/android/test/mock/MockContext.java
@@ -112,6 +112,12 @@
         throw new UnsupportedOperationException();
     }
 
+    /** @hide */
+    @Override
+    public String getOpPackageName() {
+        throw new UnsupportedOperationException();
+    }
+
     @Override
     public ApplicationInfo getApplicationInfo() {
         throw new UnsupportedOperationException();
diff --git a/tools/layoutlib/bridge/src/com/android/layoutlib/bridge/android/BridgeContext.java b/tools/layoutlib/bridge/src/com/android/layoutlib/bridge/android/BridgeContext.java
index a1f2697..b9294ab 100644
--- a/tools/layoutlib/bridge/src/com/android/layoutlib/bridge/android/BridgeContext.java
+++ b/tools/layoutlib/bridge/src/com/android/layoutlib/bridge/android/BridgeContext.java
@@ -1090,6 +1090,12 @@
     }
 
     @Override
+    public String getOpPackageName() {
+        // pass
+        return null;
+    }
+
+    @Override
     public ApplicationInfo getApplicationInfo() {
         return mApplicationInfo;
     }
diff --git a/wifi/java/android/net/wifi/WifiManager.java b/wifi/java/android/net/wifi/WifiManager.java
index 5f5d54f..2a5b4da 100644
--- a/wifi/java/android/net/wifi/WifiManager.java
+++ b/wifi/java/android/net/wifi/WifiManager.java
@@ -833,7 +833,7 @@
      */
     public List<BatchedScanResult> getBatchedScanResults() {
         try {
-            return mService.getBatchedScanResults(mContext.getBasePackageName());
+            return mService.getBatchedScanResults(mContext.getOpPackageName());
         } catch (RemoteException e) {
             return null;
         }
@@ -883,7 +883,7 @@
      */
     public List<ScanResult> getScanResults() {
         try {
-            return mService.getScanResults(mContext.getBasePackageName());
+            return mService.getScanResults(mContext.getOpPackageName());
         } catch (RemoteException e) {
             return null;
         }