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[apple/xnu.git] / iokit / Kernel / IORegistryEntry.cpp
diff --git a/iokit/Kernel/IORegistryEntry.cpp b/iokit/Kernel/IORegistryEntry.cpp
index d7fc62d915365d2a221a2e3c7b9d31cfb6e0eae0..456f93729f4c5aea60f01b2a4d65afa47380d5dd 100644 (file)
--- a/iokit/Kernel/IORegistryEntry.cpp
+++ b/iokit/Kernel/IORegistryEntry.cpp
@@ -1,41 +1,43 @@
 /*
 /*
- * Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 1998-2019 Apple Inc. All rights reserved.
  *
  *
- * @APPLE_LICENSE_HEADER_START@
- * 
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License").  You may not use this file except in compliance with the
- * License.  Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
- * 
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
+ *
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ *
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
- * License for the specific language governing rights and limitations
- * under the License.
- * 
- * @APPLE_LICENSE_HEADER_END@
- */
-/*
- * Copyright (c) 1998 Apple Computer, Inc.  All rights reserved. 
- *
- * HISTORY
- * 12 Nov 98 sdouglas created.
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
  *
  *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  */
 
 #include <IOKit/IORegistryEntry.h>
 #include <libkern/c++/OSContainers.h>
 #include <IOKit/IOService.h>
 #include <IOKit/IOKitKeys.h>
  */
 
 #include <IOKit/IORegistryEntry.h>
 #include <libkern/c++/OSContainers.h>
 #include <IOKit/IOService.h>
 #include <IOKit/IOKitKeys.h>
+#include <IOKit/IOTimeStamp.h>
 
 #include <IOKit/IOLib.h>
 
 #include <IOKit/IOLib.h>
-
+#include <stdatomic.h>
 #include <IOKit/assert.h>
 
 #include <IOKit/assert.h>
 
+#include "IOKitKernelInternal.h"
+
 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 #define super OSObject
 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 #define super OSObject
@@ -44,578 +46,539 @@ OSDefineMetaClassAndStructors(IORegistryEntry, OSObject)
 
 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 
 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
+#define kIORegPlaneParentSuffix         "ParentLinks"
+#define kIORegPlaneChildSuffix          "ChildLinks"
+#define kIORegPlaneNameSuffix           "Name"
+#define kIORegPlaneLocationSuffix       "Location"
+
+#define kIORegPlaneParentSuffixLen      (sizeof(kIORegPlaneParentSuffix) - 1)
+#define kIORegPlaneChildSuffixLen       (sizeof(kIORegPlaneChildSuffix) - 1)
+#define kIORegPlaneNameSuffixLen        (sizeof(kIORegPlaneNameSuffix) - 1)
+#define kIORegPlaneLocationSuffixLen    (sizeof(kIORegPlaneLocationSuffix) - 1)
+
+#define KASLR_IOREG_DEBUG 0
+
+struct IORegistryEntry::ExpansionData {
+       IORecursiveLock *        fLock;
+       uint64_t                 fRegistryEntryID;
+       SInt32                   fRegistryEntryGenerationCount;
+       OSObject       **_Atomic fIndexedProperties;
+};
+
+
 static IORegistryEntry * gRegistryRoot;
 static IORegistryEntry * gRegistryRoot;
-static OSDictionary *   gIORegistryPlanes;
+static OSDictionary *    gIORegistryPlanes;
 
 
-const OSSymbol *       gIONameKey;
-const OSSymbol *       gIOLocationKey;
+const OSSymbol *        gIONameKey;
+const OSSymbol *        gIOLocationKey;
+const OSSymbol *        gIORegistryEntryIDKey;
+const OSSymbol *        gIORegistryEntryPropertyKeysKey;
 
 enum {
 
 enum {
-    kParentSetIndex    = 0,
-    kChildSetIndex     = 1,
-    kNumSetIndex
+       kParentSetIndex     = 0,
+       kChildSetIndex      = 1,
+       kNumSetIndex
 };
 enum {
 };
 enum {
-    kIOMaxPlaneName    = 32
+       kIOMaxPlaneName     = 32
 };
 
 };
 
-class IORegistryPlane : public OSObject {
+enum { kIORegistryIDReserved = (1ULL << 32) + 255 };
 
 
-    friend class IORegistryEntry;
+static uint64_t gIORegistryLastID = kIORegistryIDReserved;
 
 
-    OSDeclareAbstractStructors(IORegistryPlane)
+class IORegistryPlane : public OSObject {
+       friend class IORegistryEntry;
+
+       OSDeclareAbstractStructors(IORegistryPlane);
 
 
-    const OSSymbol *   nameKey;
-    const OSSymbol *   keys[ kNumSetIndex ];
-    const OSSymbol *   pathNameKey;
-    const OSSymbol *   pathLocationKey;
-    int                        reserved[2];
+       const OSSymbol *    nameKey;
+       const OSSymbol *    keys[kNumSetIndex];
+       const OSSymbol *    pathNameKey;
+       const OSSymbol *    pathLocationKey;
+       int                 reserved[2];
 
 public:
 
 public:
-    virtual bool serialize(OSSerialize *s) const;
+       virtual bool serialize(OSSerialize *s) const APPLE_KEXT_OVERRIDE;
 };
 
 OSDefineMetaClassAndStructors(IORegistryPlane, OSObject)
 
 
 };
 
 OSDefineMetaClassAndStructors(IORegistryPlane, OSObject)
 
 
-static IORecursiveLock *       gPropertiesLock;
-static SInt32                  gIORegistryGenerationCount;
+static IORecursiveLock *        gPropertiesLock;
+static SInt32                   gIORegistryGenerationCount;
 
 
-#define UNLOCK s_lock_done( &gIORegistryLock )
-#define RLOCK  s_lock_read( &gIORegistryLock )
-#define WLOCK  s_lock_write( &gIORegistryLock );       \
-               gIORegistryGenerationCount++
-               // make atomic
+#define UNLOCK  lck_rw_done( &gIORegistryLock )
+#define RLOCK   lck_rw_lock_shared( &gIORegistryLock )
+#define WLOCK   lck_rw_lock_exclusive( &gIORegistryLock );      \
+               gIORegistryGenerationCount++
+// make atomic
 
 
-#define PUNLOCK        IORecursiveLockUnlock( gPropertiesLock )
-#define PLOCK  IORecursiveLockLock( gPropertiesLock )
+#define PUNLOCK IORecursiveLockUnlock( reserved->fLock )
+#define PLOCK   IORecursiveLockLock( reserved->fLock )
 
 #define IOREGSPLITTABLES
 
 #ifdef IOREGSPLITTABLES
 
 #define IOREGSPLITTABLES
 
 #ifdef IOREGSPLITTABLES
-#define registryTable()        fRegistryTable
+#define registryTable() fRegistryTable
 #else
 #else
-#define registryTable()        fPropertyTable
+#define registryTable() fPropertyTable
 #endif
 
 #endif
 
-#define DEBUG_FREE     1
+#define DEBUG_FREE      1
 
 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 
 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
-struct s_lock_t {
-       decl_simple_lock_data(,interlock) /* "hardware" interlock field */
-       volatile unsigned int
-               read_count:16,  /* No. of accepted readers */
-               want_upgrade:1, /* Read-to-write upgrade waiting */
-               want_write:1,   /* Writer is waiting, or
-                                  locked for write */
-               waiting:1,      /* Someone is sleeping on lock */
-               can_sleep:1;    /* Can attempts to lock go to sleep? */
-};
+lck_rw_t        gIORegistryLock;
+lck_grp_t       *gIORegistryLockGrp;
+lck_grp_attr_t  *gIORegistryLockGrpAttr;
+lck_attr_t      *gIORegistryLockAttr;
 
 
-static struct s_lock_t gIORegistryLock;
-
-/* Time we loop without holding the interlock. 
- * The former is for when we cannot sleep, the latter
- * for when our thread can go to sleep (loop less)
- * we shouldn't retake the interlock at all frequently
- * if we cannot go to sleep, since it interferes with
- * any other processors. In particular, 100 is too small
- * a number for powerpc MP systems because of cache
- * coherency issues and differing lock fetch times between
- * the processors
- */
-static unsigned int lock_wait_time[2] = { (unsigned int)-1, 100 } ;
-         
-static void
-s_lock_init(
-       s_lock_t        *l,
-       boolean_t       can_sleep)
-{
-       (void) memset((void *) l, 0, sizeof(s_lock_t));
 
 
-       simple_lock_init(&l->interlock, 0);
-       l->want_write = FALSE;
-       l->want_upgrade = FALSE;
-       l->read_count = 0;
-       l->can_sleep = can_sleep;
-}
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 
-static void
-s_lock_write(
-       register s_lock_t       * l)
+IORegistryEntry *
+IORegistryEntry::initialize( void )
 {
 {
-        register int      i;
-
-       simple_lock(&l->interlock);
-
-       /*
-        *      Try to acquire the want_write bit.
-        */
-       while (l->want_write) {
-
-               i = lock_wait_time[l->can_sleep ? 1 : 0];
-               if (i != 0) {
-                       simple_unlock(&l->interlock);
-                       while (--i != 0 && l->want_write)
-                               continue;
-                       simple_lock(&l->interlock);
-               }
-
-               if (l->can_sleep && l->want_write) {
-                       l->waiting = TRUE;
-                       thread_sleep_simple_lock((event_t) l,
-                                       simple_lock_addr(l->interlock),
-                                       THREAD_UNINT);
-                       /* interlock relocked */
-               }
-       }
-       l->want_write = TRUE;
-
-       /* Wait for readers (and upgrades) to finish */
+       bool                 ok;
 
 
-       while ((l->read_count != 0) || l->want_upgrade) {
+       if (!gRegistryRoot) {
+               gIORegistryLockGrpAttr = lck_grp_attr_alloc_init();
+               gIORegistryLockGrp = lck_grp_alloc_init("IORegistryLock", gIORegistryLockGrpAttr);
+               gIORegistryLockAttr = lck_attr_alloc_init();
+               lck_attr_rw_shared_priority(gIORegistryLockAttr);
+               lck_rw_init( &gIORegistryLock, gIORegistryLockGrp, gIORegistryLockAttr);
 
 
-               i = lock_wait_time[l->can_sleep ? 1 : 0];
-               if (i != 0) {
-                       simple_unlock(&l->interlock);
-                       while (--i != 0 && (l->read_count != 0 ||
-                                           l->want_upgrade))
-                               continue;
-                       simple_lock(&l->interlock);
-               }
-
-               if (l->can_sleep && (l->read_count != 0 || l->want_upgrade)) {
-                       l->waiting = TRUE;
-                       thread_sleep_simple_lock((event_t) l,
-                               simple_lock_addr(l->interlock),
-                               THREAD_UNINT);
-                       /* interlock relocked */
-               }
-       }
-
-       simple_unlock(&l->interlock);
-}
-
-static void
-s_lock_done(
-       register s_lock_t       * l)
-{
-       boolean_t         do_wakeup = FALSE;
+               gRegistryRoot = new IORegistryEntry;
+               gPropertiesLock = IORecursiveLockAlloc();
+               gIORegistryPlanes = OSDictionary::withCapacity( 1 );
 
 
-       simple_lock(&l->interlock);
+               assert( gRegistryRoot && gPropertiesLock
+                   && gIORegistryPlanes );
+               ok = gRegistryRoot->init();
 
 
-       if (l->read_count != 0) {
-               l->read_count -= 1;
-       }
-       else    {
-               if (l->want_upgrade) {
-                       l->want_upgrade = FALSE;
+               if (ok) {
+                       gRegistryRoot->reserved->fRegistryEntryID = ++gIORegistryLastID;
                }
                }
-                else {
-                        l->want_write = FALSE;
-                }
-        }
-
-       /*
-        *      There is no reason to wakeup a waiting thread
-        *      if the read-count is non-zero.  Consider:
-        *              we must be dropping a read lock
-        *              threads are waiting only if one wants a write lock
-        *              if there are still readers, they can't proceed
-        */
-       if (l->waiting && (l->read_count == 0)) {
-               l->waiting = FALSE;
-               do_wakeup = TRUE;
-       }
-
-       simple_unlock(&l->interlock);
-
-       if (do_wakeup)
-               thread_wakeup((event_t) l);
-}
-
-static void
-s_lock_read(
-       register s_lock_t       * l)
-{
-       register int        i;
-
-       simple_lock(&l->interlock);
 
 
-       while ( l->want_upgrade || ((0 == l->read_count) && l->want_write )) {
+               gIONameKey = OSSymbol::withCStringNoCopy( "IOName" );
+               gIOLocationKey = OSSymbol::withCStringNoCopy( "IOLocation" );
+               gIORegistryEntryIDKey = OSSymbol::withCStringNoCopy( kIORegistryEntryIDKey );
+               gIORegistryEntryPropertyKeysKey = OSSymbol::withCStringNoCopy( kIORegistryEntryPropertyKeysKey );
 
 
-               i = lock_wait_time[l->can_sleep ? 1 : 0];
-
-               if (i != 0) {
-                       simple_unlock(&l->interlock);
-                       while (--i != 0 && 
-                            (l->want_upgrade || ((0 == l->read_count) && l->want_write )))
-                               continue;
-                       simple_lock(&l->interlock);
-               }
+               assert( ok && gIONameKey && gIOLocationKey );
 
 
-               if (l->can_sleep &&
-                    (l->want_upgrade || ((0 == l->read_count) && l->want_write ))) {
-                       l->waiting = TRUE;
-                       thread_sleep_simple_lock((event_t) l,
-                                       simple_lock_addr(l->interlock),
-                                       THREAD_UNINT);
-                       /* interlock relocked */
-               }
+               gRegistryRoot->setName( "Root" );
+               gRegistryRoot->setProperty( kIORegistryPlanesKey, gIORegistryPlanes );
        }
 
        }
 
-       l->read_count += 1;
-       simple_unlock(&l->interlock);
-
+       return gRegistryRoot;
 }
 
 }
 
-/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-
-IORegistryEntry * IORegistryEntry::initialize( void )
+IORegistryEntry *
+IORegistryEntry::getRegistryRoot( void )
 {
 {
-   bool                        ok;
-
-    if( !gRegistryRoot) {
-
-        s_lock_init( &gIORegistryLock, true );
-       gRegistryRoot = new IORegistryEntry;
-       gPropertiesLock = IORecursiveLockAlloc();
-       gIORegistryPlanes = OSDictionary::withCapacity( 1 );
-        
-       assert( gRegistryRoot && gPropertiesLock
-               && gIORegistryPlanes );
-        ok = gRegistryRoot->init();
-
-       gIONameKey = OSSymbol::withCStringNoCopy( "IOName" );
-       gIOLocationKey = OSSymbol::withCStringNoCopy( "IOLocation" );
-
-       assert( ok && gIONameKey && gIOLocationKey );
-
-       gRegistryRoot->setName( "Root" );
-        gRegistryRoot->setProperty( kIORegistryPlanesKey, gIORegistryPlanes );
-    }
-
-    return( gRegistryRoot );
+       return gRegistryRoot;
 }
 
 }
 
-IORegistryEntry * IORegistryEntry::getRegistryRoot( void )
+SInt32
+IORegistryEntry::getGenerationCount( void )
 {
 {
-    return( gRegistryRoot );
+       return gIORegistryGenerationCount;
 }
 
 }
 
-SInt32 IORegistryEntry::getGenerationCount( void )
+SInt32
+IORegistryEntry::getRegistryEntryGenerationCount(void) const
 {
 {
-    return( gIORegistryGenerationCount );
+       return reserved->fRegistryEntryGenerationCount;
 }
 
 }
 
-
-const IORegistryPlane * IORegistryEntry::makePlane( const char * name )
+const IORegistryPlane *
+IORegistryEntry::makePlane( const char * name )
 {
 {
-    IORegistryPlane *  plane;
-    const OSSymbol *   nameKey;
-    const OSSymbol *   parentKey;
-    const OSSymbol *   childKey;
-    const OSSymbol *   pathNameKey;
-    const OSSymbol *   pathLocationKey;
-    char               key[ kIOMaxPlaneName + 16 ];
-    char *             end;
+       IORegistryPlane *   plane;
+       const OSSymbol *    nameKey;
+       const OSSymbol *    parentKey;
+       const OSSymbol *    childKey;
+       const OSSymbol *    pathNameKey;
+       const OSSymbol *    pathLocationKey;
+       char                key[kIOMaxPlaneName + 16];
+       char *              end;
 
 
-    strncpy( key, name, kIOMaxPlaneName );
-    key[ kIOMaxPlaneName ] = 0;
-    end = key + strlen( name );
+       strlcpy( key, name, kIOMaxPlaneName + 1 );
+       end = key + strlen( key );
 
 
-    nameKey = OSSymbol::withCString( key);
+       nameKey = OSSymbol::withCString( key);
 
 
-    strcpy( end, "ParentLinks" );
-    parentKey = OSSymbol::withCString( key);
+       strlcpy( end, kIORegPlaneParentSuffix, kIORegPlaneParentSuffixLen + 1 );
+       parentKey = OSSymbol::withCString( key);
 
 
-    strcpy( end, "ChildLinks" );
-    childKey = OSSymbol::withCString( key);
+       strlcpy( end, kIORegPlaneChildSuffix, kIORegPlaneChildSuffixLen + 1 );
+       childKey = OSSymbol::withCString( key);
 
 
-    strcpy( end, "Name" );
-    pathNameKey = OSSymbol::withCString( key);
+       strlcpy( end, kIORegPlaneNameSuffix, kIORegPlaneNameSuffixLen + 1 );
+       pathNameKey = OSSymbol::withCString( key);
 
 
-    strcpy( end, "Location" );
-    pathLocationKey = OSSymbol::withCString( key);
+       strlcpy( end, kIORegPlaneLocationSuffix, kIORegPlaneLocationSuffixLen + 1 );
+       pathLocationKey = OSSymbol::withCString( key);
 
 
-    plane = new IORegistryPlane;
+       plane = new IORegistryPlane;
 
 
-    if( plane && plane->init()
-       && nameKey && parentKey && childKey
-       && pathNameKey && pathLocationKey ) {
+       if (plane && plane->init()
+           && nameKey && parentKey && childKey
+           && pathNameKey && pathLocationKey) {
+               plane->nameKey = nameKey;
+               plane->keys[kParentSetIndex] = parentKey;
+               plane->keys[kChildSetIndex] = childKey;
+               plane->pathNameKey = pathNameKey;
+               plane->pathLocationKey = pathLocationKey;
 
 
-       plane->nameKey = nameKey;
-       plane->keys[ kParentSetIndex ] = parentKey;
-       plane->keys[ kChildSetIndex ] = childKey;
-       plane->pathNameKey = pathNameKey;
-       plane->pathLocationKey = pathLocationKey;
-
-       WLOCK;
-        gIORegistryPlanes->setObject( nameKey, plane );
-       UNLOCK;
-
-    } else {
-
-       if( plane)
-           plane->release();
-       if( pathLocationKey)
-           pathLocationKey->release();
-       if( pathNameKey)
-           pathNameKey->release();
-       if( parentKey)
-           parentKey->release();
-       if( childKey)
-           childKey->release();
-       if( nameKey)
-           nameKey->release();
-       plane = 0;
-    }
+               WLOCK;
+               gIORegistryPlanes->setObject( nameKey, plane );
+               UNLOCK;
+       } else {
+               if (plane) {
+                       plane->release();
+               }
+               if (pathLocationKey) {
+                       pathLocationKey->release();
+               }
+               if (pathNameKey) {
+                       pathNameKey->release();
+               }
+               if (parentKey) {
+                       parentKey->release();
+               }
+               if (childKey) {
+                       childKey->release();
+               }
+               if (nameKey) {
+                       nameKey->release();
+               }
+               plane = NULL;
+       }
 
 
-    return( plane);
+       return plane;
 }
 
 }
 
-const IORegistryPlane * IORegistryEntry::getPlane( const char * name )
+const IORegistryPlane *
+IORegistryEntry::getPlane( const char * name )
 {
 {
-    const IORegistryPlane *    plane;
+       const IORegistryPlane *     plane;
 
 
-    RLOCK;
-    plane = (const IORegistryPlane *) gIORegistryPlanes->getObject( name );
-    UNLOCK;
+       RLOCK;
+       plane = (const IORegistryPlane *) gIORegistryPlanes->getObject( name );
+       UNLOCK;
 
 
-    return( plane );
+       return plane;
 }
 
 }
 
-bool IORegistryPlane::serialize(OSSerialize *s) const
+bool
+IORegistryPlane::serialize(OSSerialize *s) const
 {
 {
-    return( nameKey->serialize(s) );
+       return nameKey->serialize(s);
 }
 
 enum { kIORegCapacityIncrement = 4 };
 
 }
 
 enum { kIORegCapacityIncrement = 4 };
 
-bool IORegistryEntry::init( OSDictionary * dict )
+bool
+IORegistryEntry::init( OSDictionary * dict )
 {
 {
-    OSString * prop;
-
-    if( !super::init())
-       return( false);
+       OSString *  prop;
 
 
-    if( dict) {
-       dict->retain();
-       if( fPropertyTable)
-           fPropertyTable->release();
-       fPropertyTable = dict;
+       if (!super::init()) {
+               return false;
+       }
 
 
-    } else if( !fPropertyTable) {
-        fPropertyTable = OSDictionary::withCapacity( kIORegCapacityIncrement );
-       if( fPropertyTable)
-            fPropertyTable->setCapacityIncrement( kIORegCapacityIncrement );
-    }
+       if (!reserved) {
+               reserved = IONew(ExpansionData, 1);
+               if (!reserved) {
+                       return false;
+               }
+               bzero(reserved, sizeof(ExpansionData));
+               reserved->fLock = IORecursiveLockAlloc();
+               if (!reserved->fLock) {
+                       return false;
+               }
+       }
+       if (dict) {
+               if (OSCollection::kImmutable & dict->setOptions(0, 0)) {
+                       dict = (OSDictionary *) dict->copyCollection();
+                       if (!dict) {
+                               return false;
+                       }
+               } else {
+                       dict->retain();
+               }
+               if (fPropertyTable) {
+                       fPropertyTable->release();
+               }
+               fPropertyTable = dict;
+       } else if (!fPropertyTable) {
+               fPropertyTable = OSDictionary::withCapacity( kIORegCapacityIncrement );
+               if (fPropertyTable) {
+                       fPropertyTable->setCapacityIncrement( kIORegCapacityIncrement );
+               }
+       }
 
 
-    if( !fPropertyTable)
-        return( false);
+       if (!fPropertyTable) {
+               return false;
+       }
 
 #ifdef IOREGSPLITTABLES
 
 #ifdef IOREGSPLITTABLES
-    if( !fRegistryTable) {
-       fRegistryTable = OSDictionary::withCapacity( kIORegCapacityIncrement );
-       if( fRegistryTable)
-           fRegistryTable->setCapacityIncrement( kIORegCapacityIncrement );
-    }
-
-    if( (prop = OSDynamicCast( OSString, getProperty( gIONameKey)))) {
-        OSSymbol * sym = (OSSymbol *)OSSymbol::withString( prop);
-        // ok for OSSymbol too
-        setName( sym);
-        sym->release();
-    }
+       if (!fRegistryTable) {
+               fRegistryTable = OSDictionary::withCapacity( kIORegCapacityIncrement );
+               if (fRegistryTable) {
+                       fRegistryTable->setCapacityIncrement( kIORegCapacityIncrement );
+               }
+       }
+
+       if ((prop = OSDynamicCast( OSString, getProperty( gIONameKey)))) {
+               OSSymbol * sym = (OSSymbol *)OSSymbol::withString( prop);
+               // ok for OSSymbol too
+               setName( sym);
+               sym->release();
+       }
 
 #endif /* IOREGSPLITTABLES */
 
 
 #endif /* IOREGSPLITTABLES */
 
-    return( true);
+       return true;
 }
 
 }
 
-bool IORegistryEntry::init( IORegistryEntry * old,
-                               const IORegistryPlane * plane )
+bool
+IORegistryEntry::init( IORegistryEntry * old,
+    const IORegistryPlane * plane )
 {
 {
-    OSArray *          all;
-    IORegistryEntry *          next;
-    unsigned int       index;
+       OSArray *           all;
+       IORegistryEntry *           next;
+       unsigned int        index;
+
+       if (!super::init()) {
+               return false;
+       }
 
 
-    if( !super::init())
-       return( false);
+       if (!reserved) {
+               reserved = IONew(ExpansionData, 1);
+               if (!reserved) {
+                       return false;
+               }
+               bzero(reserved, sizeof(ExpansionData));
+               reserved->fLock = IORecursiveLockAlloc();
+               if (!reserved->fLock) {
+                       return false;
+               }
+       }
 
 
-    WLOCK;
+       WLOCK;
 
 
-    fPropertyTable = old->getPropertyTable();
-    fPropertyTable->retain();
+       reserved->fRegistryEntryID = old->reserved->fRegistryEntryID;
+
+       fPropertyTable = old->dictionaryWithProperties();
 #ifdef IOREGSPLITTABLES
 #ifdef IOREGSPLITTABLES
-    fRegistryTable = old->fRegistryTable;
-    old->fRegistryTable = OSDictionary::withDictionary( fRegistryTable );
+       fRegistryTable = old->fRegistryTable;
+       old->fRegistryTable = (OSDictionary *) fRegistryTable->copyCollection();
 #endif /* IOREGSPLITTABLES */
 
 #endif /* IOREGSPLITTABLES */
 
-    old->registryTable()->removeObject( plane->keys[ kParentSetIndex ] );
-    old->registryTable()->removeObject( plane->keys[ kChildSetIndex ] );
+       old->registryTable()->removeObject( plane->keys[kParentSetIndex] );
+       old->registryTable()->removeObject( plane->keys[kChildSetIndex] );
 
 
-    all = getParentSetReference( plane );
-    if( all) for( index = 0;
-              (next = (IORegistryEntry *) all->getObject(index));
-              index++ ) {
-           next->makeLink( this, kChildSetIndex, plane );
-            next->breakLink( old, kChildSetIndex, plane );
-    }
+       all = getParentSetReference( plane );
+       if (all) {
+               for (index = 0;
+                   (next = (IORegistryEntry *) all->getObject(index));
+                   index++) {
+                       next->makeLink( this, kChildSetIndex, plane );
+                       next->breakLink( old, kChildSetIndex, plane );
+               }
+       }
 
 
-    all = getChildSetReference( plane );
-    if( all) for( index = 0;
-              (next = (IORegistryEntry *) all->getObject(index));
-              index++ ) {
-           next->makeLink( this, kParentSetIndex, plane );
-            next->breakLink( old, kParentSetIndex, plane );
-    }
+       all = getChildSetReference( plane );
+       if (all) {
+               for (index = 0;
+                   (next = (IORegistryEntry *) all->getObject(index));
+                   index++) {
+                       next->makeLink( this, kParentSetIndex, plane );
+                       next->breakLink( old, kParentSetIndex, plane );
+               }
+       }
 
 
-    UNLOCK;
+       UNLOCK;
 
 
-    return( true );
+       return true;
 }
 
 }
 
-void IORegistryEntry::free( void )
+void
+IORegistryEntry::free( void )
 {
 {
-
 #if DEBUG_FREE
 #if DEBUG_FREE
-#define msg ": attached at free()"
-    char buf[ strlen(msg) + 40 ];
-
-    if( registryTable() && gIOServicePlane) {
-        if( getParentSetReference( gIOServicePlane )
-            || getChildSetReference( gIOServicePlane )) {
-
-            strncpy( buf, getName(), 32);
-            buf[32] = 0;
-            strcat( buf, msg );
-            IOPanic( buf );
-        }
-    }
+       if (registryTable() && gIOServicePlane) {
+               if (getParentSetReference( gIOServicePlane )
+                   || getChildSetReference( gIOServicePlane )) {
+                       panic("%s: attached at free()", getName());
+               }
+       }
 #endif
 
 #endif
 
-    if( getPropertyTable())
-        getPropertyTable()->release();
+       if (getPropertyTable()) {
+               getPropertyTable()->release();
+       }
 
 #ifdef IOREGSPLITTABLES
 
 #ifdef IOREGSPLITTABLES
-    if( registryTable())
-        registryTable()->release();
+       if (registryTable()) {
+               registryTable()->release();
+       }
 #endif /* IOREGSPLITTABLES */
 
 #endif /* IOREGSPLITTABLES */
 
-    super::free();
+       if (reserved) {
+               if (reserved->fIndexedProperties) {
+                       for (int idx = 0; idx < kIORegistryEntryIndexedPropertyCount; idx++) {
+                               if (reserved->fIndexedProperties[idx]) {
+                                       reserved->fIndexedProperties[idx]->release();
+                               }
+                       }
+                       IODelete(reserved->fIndexedProperties, OSObject *, kIORegistryEntryIndexedPropertyCount);
+               }
+               if (reserved->fLock) {
+                       IORecursiveLockFree(reserved->fLock);
+               }
+               IODelete(reserved, ExpansionData, 1);
+       }
+
+       super::free();
 }
 
 }
 
-void IORegistryEntry::setPropertyTable( OSDictionary * dict )
+void
+IORegistryEntry::setPropertyTable( OSDictionary * dict )
 {
 {
-    if( fPropertyTable)
-       fPropertyTable->release();
-    if( dict)
-       dict->retain();
-    fPropertyTable = dict;
+       PLOCK;
+       if (dict) {
+               dict->retain();
+       }
+       if (fPropertyTable) {
+               fPropertyTable->release();
+       }
+
+       fPropertyTable = dict;
+       PUNLOCK;
 }
 
 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /* Wrappers to synchronize property table */
 
 }
 
 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /* Wrappers to synchronize property table */
 
-#define wrap2(type, constant)                                          \
-OSObject *                                                             \
-IORegistryEntry::copyProperty( type * aKey) constant                   \
-{                                                                      \
-    OSObject * obj;                                                    \
-                                                                       \
-    PLOCK;                                                             \
-    obj = getProperty( aKey );                                         \
-    if( obj)                                                           \
-        obj->retain();                                                 \
-    PUNLOCK;                                                           \
-                                                                       \
-    return( obj );                                                     \
-}
-
-#define wrap4(type,constant) \
+#define wrap2(type, constant)                                           \
+OSObject *                                                              \
+IORegistryEntry::copyProperty( type * aKey) constant                    \
+{                                                                       \
+    OSObject * obj;                                                    \
+                                                                        \
+    PLOCK;                                                              \
+    obj = getProperty( aKey );                                          \
+    if( obj)                                                            \
+       obj->retain();                                                  \
+    PUNLOCK;                                                            \
+                                                                        \
+    return( obj );                                                      \
+}
+
+#define wrap4(type, constant) \
 OSObject * \
 IORegistryEntry::getProperty( type *                  aKey, \
 OSObject * \
 IORegistryEntry::getProperty( type *                  aKey, \
-                              const IORegistryPlane * plane, \
-                              IOOptionBits            options ) constant \
+                             const IORegistryPlane * plane, \
+                             IOOptionBits            options ) constant \
 { \
     OSObject * obj = getProperty( aKey ); \
     \
 { \
     OSObject * obj = getProperty( aKey ); \
     \
-    if ( (0 == obj) && plane && (options & kIORegistryIterateRecursively) ) { \
-        IORegistryEntry * entry = (IORegistryEntry *) this; \
-        IORegistryIterator * iter; \
-        iter = IORegistryIterator::iterateOver( entry, plane, options ); \
+    if ( (NULL == obj) && plane && (options & kIORegistryIterateRecursively) ) { \
+       IORegistryEntry * entry = (IORegistryEntry *) this; \
+       IORegistryIterator * iter; \
+       iter = IORegistryIterator::iterateOver( entry, plane, options ); \
         \
         \
-        if(iter) { \
-            while ( (0 == obj) && (entry = iter->getNextObject()) ) { \
-                obj = entry->getProperty( aKey ); \
-            } \
-            iter->release(); \
-        } \
+       if(iter) { \
+           while ( (NULL == obj) && (entry = iter->getNextObject()) ) { \
+               obj = entry->getProperty( aKey ); \
+           } \
+           iter->release(); \
+       } \
     } \
     \
     return( obj ); \
 }
 
     } \
     \
     return( obj ); \
 }
 
-#define wrap5(type,constant) \
+#define wrap5(type, constant) \
 OSObject * \
 IORegistryEntry::copyProperty( type *                  aKey, \
 OSObject * \
 IORegistryEntry::copyProperty( type *                  aKey, \
-                              const IORegistryPlane * plane, \
-                              IOOptionBits            options ) constant \
+                             const IORegistryPlane * plane, \
+                             IOOptionBits            options ) constant \
 { \
     OSObject * obj = copyProperty( aKey ); \
     \
 { \
     OSObject * obj = copyProperty( aKey ); \
     \
-    if ( (0 == obj) && plane && (options & kIORegistryIterateRecursively) ) { \
-        IORegistryEntry * entry = (IORegistryEntry *) this; \
-        IORegistryIterator * iter; \
-        iter = IORegistryIterator::iterateOver( entry, plane, options ); \
+    if ( (NULL == obj) && plane && (options & kIORegistryIterateRecursively) ) { \
+       IORegistryEntry * entry = (IORegistryEntry *) this; \
+       IORegistryIterator * iter; \
+       iter = IORegistryIterator::iterateOver( entry, plane, options ); \
         \
         \
-        if(iter) { \
-            while ( (0 == obj) && (entry = iter->getNextObject()) ) { \
-                obj = entry->copyProperty( aKey ); \
-            } \
-            iter->release(); \
-        } \
+       if(iter) { \
+           while ( (NULL == obj) && (entry = iter->getNextObject()) ) { \
+               obj = entry->copyProperty( aKey ); \
+           } \
+           iter->release(); \
+       } \
     } \
     \
     return( obj ); \
 }
 
     } \
     \
     return( obj ); \
 }
 
-bool IORegistryEntry::serializeProperties( OSSerialize * s ) const
+bool
+IORegistryEntry::serializeProperties( OSSerialize * s ) const
 {
 {
-    bool ok;
-
 //    setProperty( getRetainCount(), 32, "__retain" );
 
 //    setProperty( getRetainCount(), 32, "__retain" );
 
-    PLOCK;
-    ok = getPropertyTable()->serialize( s );
-    PUNLOCK;
+       PLOCK;
+       OSCollection *snapshotProperties = getPropertyTable()->copyCollection();
+       PUNLOCK;
+
+       if (!snapshotProperties) {
+               return false;
+       }
+
+       bool ok =  snapshotProperties->serialize( s );
+       snapshotProperties->release();
+       return ok;
+}
+
+OSArray *
+IORegistryEntry::copyPropertyKeys(void) const
+{
+       PLOCK;
+       OSArray * keys = getPropertyTable()->copyKeys();
+       PUNLOCK;
 
 
-    return( ok );
+       return keys;
 }
 
 }
 
-OSDictionary * IORegistryEntry::dictionaryWithProperties( void ) const
+OSDictionary *
+IORegistryEntry::dictionaryWithProperties( void ) const
 {
 {
-    OSDictionary *     dict;
+       OSDictionary *      dict;
 
 
-    PLOCK;
-    dict = OSDictionary::withDictionary( getPropertyTable(),
-                            getPropertyTable()->getCapacity() );
-    PUNLOCK;
+       PLOCK;
+       dict = OSDictionary::withDictionary( getPropertyTable(),
+           getPropertyTable()->getCapacity());
+       PUNLOCK;
 
 
-    return( dict );
+       return dict;
 }
 
 }
 
-IOReturn IORegistryEntry::setProperties( OSObject * properties )
+IOReturn
+IORegistryEntry::setProperties( OSObject * properties )
 {
 {
-    return( kIOReturnUnsupported );
+       return kIOReturnUnsupported;
 }
 
 wrap2(const OSSymbol, const)       // copyProperty() definition
 wrap2(const OSString, const)       // copyProperty() definition
 }
 
 wrap2(const OSSymbol, const)       // copyProperty() definition
 wrap2(const OSString, const)       // copyProperty() definition
-wrap2(const char, const)          // copyProperty() definition
+wrap2(const char, const)           // copyProperty() definition
 
 wrap4(const OSSymbol, const)       // getProperty() w/plane definition
 wrap4(const OSString, const)       // getProperty() w/plane definition
 
 wrap4(const OSSymbol, const)       // getProperty() w/plane definition
 wrap4(const OSString, const)       // getProperty() w/plane definition
@@ -629,740 +592,925 @@ wrap5(const char, const)           // copyProperty() w/plane definition
 OSObject *
 IORegistryEntry::getProperty( const OSSymbol * aKey) const
 {
 OSObject *
 IORegistryEntry::getProperty( const OSSymbol * aKey) const
 {
-    OSObject * obj;
+       OSObject * obj;
+
+       PLOCK;
+       obj = getPropertyTable()->getObject( aKey );
+       PUNLOCK;
+
+       return obj;
+}
+
+void
+IORegistryEntry::removeProperty( const OSSymbol * aKey)
+{
+       PLOCK;
+       getPropertyTable()->removeObject( aKey );
+       PUNLOCK;
+}
+
+#if KASLR_IOREG_DEBUG
+extern "C" {
+bool ScanForAddrInObject(OSObject * theObject,
+    int indent);
+}; /* extern "C" */
+#endif
+
+bool
+IORegistryEntry::setProperty( const OSSymbol * aKey, OSObject * anObject)
+{
+       bool ret = false;
+
+       // If we are inserting a collection class and the current entry
+       // is attached into the registry (inPlane()) then mark the collection
+       // as immutable.
+       OSCollection *coll = OSDynamicCast(OSCollection, anObject);
+       bool makeImmutable = (coll && inPlane());
+
+       PLOCK;
+       if (makeImmutable) {
+               coll->setOptions( OSCollection::kMASK, OSCollection::kImmutable );
+       }
+
+       ret = getPropertyTable()->setObject( aKey, anObject );
+       PUNLOCK;
+
+#if KASLR_IOREG_DEBUG
+       if (anObject && strcmp(kIOKitDiagnosticsKey, aKey->getCStringNoCopy()) != 0) {
+               if (ScanForAddrInObject(anObject, 0)) {
+                       IOLog("%s: IORegistryEntry name %s with key \"%s\" \n",
+                           __FUNCTION__,
+                           getName(0),
+                           aKey->getCStringNoCopy());
+               }
+       }
+#endif
+
+       return ret;
+}
+
+IOReturn
+IORegistryEntry::
+runPropertyAction(Action inAction, OSObject *target,
+    void *arg0, void *arg1, void *arg2, void *arg3)
+{
+       IOReturn res;
 
 
-    PLOCK;
-    obj = getPropertyTable()->getObject( aKey );
-    PUNLOCK;
+       // closeGate is recursive so don't worry if we already hold the lock.
+       PLOCK;
+       res = (*inAction)(target, arg0, arg1, arg2, arg3);
+       PUNLOCK;
 
 
-    return( obj );
+       return res;
+}
+
+static IOReturn
+IORegistryEntryActionToBlock(OSObject *target,
+    void *arg0, void *arg1,
+    void *arg2, void *arg3)
+{
+       IORegistryEntry::ActionBlock block = (typeof(block))arg0;
+       return block();
+}
+
+IOReturn
+IORegistryEntry::runPropertyActionBlock(ActionBlock block)
+{
+       IOReturn res;
+
+       res = runPropertyAction(&IORegistryEntryActionToBlock, this, block);
+
+       return res;
 }
 
 OSObject *
 IORegistryEntry::getProperty( const OSString * aKey) const
 {
 }
 
 OSObject *
 IORegistryEntry::getProperty( const OSString * aKey) const
 {
-    const OSSymbol * tmpKey = OSSymbol::withString( aKey );
-    OSObject * obj = getProperty( tmpKey );
+       const OSSymbol * tmpKey = OSSymbol::withString( aKey );
+       OSObject * obj = getProperty( tmpKey );
 
 
-    tmpKey->release();
-    return( obj );
+       tmpKey->release();
+       return obj;
 }
 
 OSObject *
 IORegistryEntry::getProperty( const char * aKey) const
 {
 }
 
 OSObject *
 IORegistryEntry::getProperty( const char * aKey) const
 {
-    const OSSymbol * tmpKey = OSSymbol::withCString( aKey );
-    OSObject * obj = getProperty( tmpKey );
+       const OSSymbol * tmpKey = OSSymbol::withCString( aKey );
+       OSObject * obj = getProperty( tmpKey );
 
 
-    tmpKey->release();
-    return( obj );
+       tmpKey->release();
+       return obj;
 }
 
 }
 
-void
-IORegistryEntry::removeProperty( const OSSymbol * aKey)
-{
-    PLOCK;
-    getPropertyTable()->removeObject( aKey );
-    PUNLOCK;
-}
 
 void
 IORegistryEntry::removeProperty( const OSString * aKey)
 {
 
 void
 IORegistryEntry::removeProperty( const OSString * aKey)
 {
-    const OSSymbol * tmpKey = OSSymbol::withString( aKey );
-    removeProperty( tmpKey );
-    tmpKey->release();
+       const OSSymbol * tmpKey = OSSymbol::withString( aKey );
+       removeProperty( tmpKey );
+       tmpKey->release();
 }
 
 void
 IORegistryEntry::removeProperty( const char * aKey)
 {
 }
 
 void
 IORegistryEntry::removeProperty( const char * aKey)
 {
-    const OSSymbol * tmpKey = OSSymbol::withCString( aKey );
-    removeProperty( tmpKey );
-    tmpKey->release();
-}
-
-bool
-IORegistryEntry::setProperty( const OSSymbol * aKey, OSObject * anObject)
-{
-    bool ret = false;
-    PLOCK;
-    ret = getPropertyTable()->setObject( aKey, anObject );
-    PUNLOCK;
-    
-    return ret;
+       const OSSymbol * tmpKey = OSSymbol::withCString( aKey );
+       removeProperty( tmpKey );
+       tmpKey->release();
 }
 
 bool
 IORegistryEntry::setProperty( const OSString * aKey, OSObject * anObject)
 {
 }
 
 bool
 IORegistryEntry::setProperty( const OSString * aKey, OSObject * anObject)
 {
-    const OSSymbol * tmpKey = OSSymbol::withString( aKey );
-    bool ret = setProperty( tmpKey, anObject );
+       const OSSymbol * tmpKey = OSSymbol::withString( aKey );
+       bool ret = setProperty( tmpKey, anObject );
 
 
-    tmpKey->release();
-    return ret;
+       tmpKey->release();
+       return ret;
 }
 
 bool
 }
 
 bool
-IORegistryEntry::setProperty( const char * aKey,  OSObject * anObject)
+IORegistryEntry::setProperty( const char * aKey, OSObject * anObject)
 {
 {
-    const OSSymbol * tmpKey = OSSymbol::withCString( aKey );
-    bool ret = setProperty( tmpKey, anObject );
+       const OSSymbol * tmpKey = OSSymbol::withCString( aKey );
+       bool ret = setProperty( tmpKey, anObject );
 
 
-    tmpKey->release();
-    return ret;
+       tmpKey->release();
+       return ret;
 }
 
 bool
 IORegistryEntry::setProperty(const char * aKey, const char * aString)
 {
 }
 
 bool
 IORegistryEntry::setProperty(const char * aKey, const char * aString)
 {
-    bool ret = false;
-    OSSymbol * aSymbol = (OSSymbol *) OSSymbol::withCString( aString );
+       bool ret = false;
+       OSSymbol * aSymbol = (OSSymbol *) OSSymbol::withCString( aString );
 
 
-    if( aSymbol) {
-        const OSSymbol * tmpKey = OSSymbol::withCString( aKey );
-        ret = setProperty( tmpKey, aSymbol );
+       if (aSymbol) {
+               const OSSymbol * tmpKey = OSSymbol::withCString( aKey );
+               ret = setProperty( tmpKey, aSymbol );
 
 
-        tmpKey->release();
-        aSymbol->release();
-    }
-    return( ret );
+               tmpKey->release();
+               aSymbol->release();
+       }
+       return ret;
 }
 
 bool
 IORegistryEntry::setProperty(const char * aKey, bool aBoolean)
 {
 }
 
 bool
 IORegistryEntry::setProperty(const char * aKey, bool aBoolean)
 {
-    bool ret = false;
-    OSBoolean * aBooleanObj = OSBoolean::withBoolean( aBoolean );
+       bool ret = false;
+       OSBoolean * aBooleanObj = OSBoolean::withBoolean( aBoolean );
 
 
-    if( aBooleanObj) {
-        const OSSymbol * tmpKey = OSSymbol::withCString( aKey );
-        ret = setProperty( tmpKey, aBooleanObj );
+       if (aBooleanObj) {
+               const OSSymbol * tmpKey = OSSymbol::withCString( aKey );
+               ret = setProperty( tmpKey, aBooleanObj );
 
 
-        tmpKey->release();
-        aBooleanObj->release();
-    }
-    return( ret );
+               tmpKey->release();
+               aBooleanObj->release();
+       }
+       return ret;
 }
 
 bool
 IORegistryEntry::setProperty( const char *       aKey,
 }
 
 bool
 IORegistryEntry::setProperty( const char *       aKey,
-                              unsigned long long aValue,
-                              unsigned int       aNumberOfBits)
+    unsigned long long aValue,
+    unsigned int       aNumberOfBits)
 {
 {
-    bool ret = false;
-    OSNumber * anOffset = OSNumber::withNumber( aValue, aNumberOfBits );
+       bool ret = false;
+       OSNumber * anOffset = OSNumber::withNumber( aValue, aNumberOfBits );
 
 
-    if( anOffset) {
-        const OSSymbol * tmpKey = OSSymbol::withCString( aKey );
-        ret = setProperty( tmpKey, anOffset );
+       if (anOffset) {
+               const OSSymbol * tmpKey = OSSymbol::withCString( aKey );
+               ret = setProperty( tmpKey, anOffset );
 
 
-        tmpKey->release();
-        anOffset->release();
-    }
-    return( ret );
+               tmpKey->release();
+               anOffset->release();
+       }
+       return ret;
 }
 
 bool
 IORegistryEntry::setProperty( const char *      aKey,
 }
 
 bool
 IORegistryEntry::setProperty( const char *      aKey,
-                              void *           bytes,
-                              unsigned int      length)
+    void *            bytes,
+    unsigned int      length)
 {
 {
-    bool ret = false;
-    OSData * data = OSData::withBytes( bytes, length );
+       bool ret = false;
+       OSData * data = OSData::withBytes( bytes, length );
 
 
-    if( data) {
-        const OSSymbol * tmpKey = OSSymbol::withCString( aKey );
-        ret = setProperty( tmpKey, data );
+       if (data) {
+               const OSSymbol * tmpKey = OSSymbol::withCString( aKey );
+               ret = setProperty( tmpKey, data );
 
 
-        tmpKey->release();
-        data->release();
-    }
-    return( ret );
+               tmpKey->release();
+               data->release();
+       }
+       return ret;
+}
+
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+OSObject *
+IORegistryEntry::setIndexedProperty(uint32_t index, OSObject * anObject)
+{
+       OSObject ** array;
+       OSObject *  prior;
+
+       if (index >= kIORegistryEntryIndexedPropertyCount) {
+               return NULL;
+       }
+
+       array = atomic_load_explicit(&reserved->fIndexedProperties, memory_order_acquire);
+       if (!array) {
+               array = IONew(OSObject *, kIORegistryEntryIndexedPropertyCount);
+               if (!array) {
+                       return NULL;
+               }
+               bzero(array, kIORegistryEntryIndexedPropertyCount * sizeof(array[0]));
+               if (!OSCompareAndSwapPtr(NULL, array, &reserved->fIndexedProperties)) {
+                       IODelete(array, OSObject *, kIORegistryEntryIndexedPropertyCount);
+               }
+       }
+       if (!reserved->fIndexedProperties) {
+               return NULL;
+       }
+
+       prior = reserved->fIndexedProperties[index];
+       if (anObject) {
+               anObject->retain();
+       }
+       reserved->fIndexedProperties[index] = anObject;
+
+       return prior;
+}
+
+OSObject *
+IORegistryEntry::getIndexedProperty(uint32_t index) const
+{
+       if (index >= kIORegistryEntryIndexedPropertyCount) {
+               return NULL;
+       }
+       if (!reserved->fIndexedProperties) {
+               return NULL;
+       }
+
+       return reserved->fIndexedProperties[index];
 }
 
 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /* Name, location, paths */
 
 }
 
 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /* Name, location, paths */
 
-const char * IORegistryEntry::getName( const IORegistryPlane * plane ) const
+const char *
+IORegistryEntry::getName( const IORegistryPlane * plane ) const
 {
 {
-    OSSymbol *         sym = 0;
+       OSSymbol *          sym = NULL;
 
 
-    RLOCK;
-    if( plane)
-       sym = (OSSymbol *) registryTable()->getObject( plane->pathNameKey );
-    if( !sym)
-       sym = (OSSymbol *) registryTable()->getObject( gIONameKey );
-    UNLOCK;
+       RLOCK;
+       if (plane) {
+               sym = (OSSymbol *) registryTable()->getObject( plane->pathNameKey );
+       }
+       if (!sym) {
+               sym = (OSSymbol *) registryTable()->getObject( gIONameKey );
+       }
+       UNLOCK;
 
 
-    if( sym)
-       return( sym->getCStringNoCopy());
-    else
-        return( (getMetaClass())->getClassName());
+       if (sym) {
+               return sym->getCStringNoCopy();
+       } else {
+               return (getMetaClass())->getClassName();
+       }
 }
 
 }
 
-const OSSymbol * IORegistryEntry::copyName(
-                       const IORegistryPlane * plane ) const
+const OSSymbol *
+IORegistryEntry::copyName(
+       const IORegistryPlane * plane ) const
 {
 {
-    OSSymbol *         sym = 0;
+       OSSymbol *          sym = NULL;
 
 
-    RLOCK;
-    if( plane)
-       sym = (OSSymbol *) registryTable()->getObject( plane->pathNameKey );
-    if( !sym)
-       sym = (OSSymbol *) registryTable()->getObject( gIONameKey );
-    if( sym)
-       sym->retain();
-    UNLOCK;
+       RLOCK;
+       if (plane) {
+               sym = (OSSymbol *) registryTable()->getObject( plane->pathNameKey );
+       }
+       if (!sym) {
+               sym = (OSSymbol *) registryTable()->getObject( gIONameKey );
+       }
+       if (sym) {
+               sym->retain();
+       }
+       UNLOCK;
 
 
-    if( sym)
-       return( sym );
-    else
-        return( OSSymbol::withCString((getMetaClass())->getClassName()) );
+       if (sym) {
+               return sym;
+       } else {
+               return OSSymbol::withCString((getMetaClass())->getClassName());
+       }
 }
 
 }
 
-const OSSymbol * IORegistryEntry::copyLocation(
-                       const IORegistryPlane * plane ) const
+const OSSymbol *
+IORegistryEntry::copyLocation(
+       const IORegistryPlane * plane ) const
 {
 {
-    OSSymbol *         sym = 0;
+       OSSymbol *          sym = NULL;
 
 
-    RLOCK;
-    if( plane)
-       sym = (OSSymbol *) registryTable()->getObject( plane->pathLocationKey );
-    if( !sym)
-       sym = (OSSymbol *) registryTable()->getObject( gIOLocationKey );
-    if( sym)
-       sym->retain();
-    UNLOCK;
+       RLOCK;
+       if (plane) {
+               sym = (OSSymbol *) registryTable()->getObject( plane->pathLocationKey );
+       }
+       if (!sym) {
+               sym = (OSSymbol *) registryTable()->getObject( gIOLocationKey );
+       }
+       if (sym) {
+               sym->retain();
+       }
+       UNLOCK;
 
 
-    return( sym );
+       return sym;
 }
 
 }
 
-const char * IORegistryEntry::getLocation( const IORegistryPlane * plane ) const
+const char *
+IORegistryEntry::getLocation( const IORegistryPlane * plane ) const
 {
 {
-    const OSSymbol *   sym = copyLocation( plane );
-    const char *       result = 0;
+       const OSSymbol *    sym = copyLocation( plane );
+       const char *        result = NULL;
 
 
-    if( sym) {
-       result = sym->getCStringNoCopy();
-       sym->release();
-    }
+       if (sym) {
+               result = sym->getCStringNoCopy();
+               sym->release();
+       }
 
 
-    return( result );
+       return result;
 }
 
 }
 
-void IORegistryEntry::setName( const OSSymbol * name,
-                            const IORegistryPlane * plane )
+void
+IORegistryEntry::setName( const OSSymbol * name,
+    const IORegistryPlane * plane )
 {
 {
-    const OSSymbol *   key;
+       const OSSymbol *    key;
 
 
-    if( name) {
-        if( plane)
-            key = plane->pathNameKey;
-        else
-            key = gIONameKey;
+       if (name) {
+               if (plane) {
+                       key = plane->pathNameKey;
+               } else {
+                       key = gIONameKey;
+               }
 
 
-       WLOCK;
-        registryTable()->setObject( key, (OSObject *) name);
-       UNLOCK;
-    }
+               if (gIOKitTrace && reserved && reserved->fRegistryEntryID) {
+                       uint64_t str_id = 0;
+                       uint64_t __unused regID = getRegistryEntryID();
+                       kernel_debug_string(IODBG_IOREGISTRY(IOREGISTRYENTRY_NAME_STRING), &str_id, name->getCStringNoCopy());
+                       KERNEL_DEBUG_CONSTANT(IODBG_IOREGISTRY(IOREGISTRYENTRY_NAME),
+                           (uintptr_t) regID,
+                           (uintptr_t) (regID >> 32),
+                           (uintptr_t) str_id,
+                           (uintptr_t) (str_id >> 32),
+                           0);
+               }
+
+               WLOCK;
+               registryTable()->setObject( key, (OSObject *) name);
+               UNLOCK;
+       }
 }
 
 }
 
-void IORegistryEntry::setName( const char * name,
-                            const IORegistryPlane * plane )
+void
+IORegistryEntry::setName( const char * name,
+    const IORegistryPlane * plane )
 {
 {
-    OSSymbol * sym = (OSSymbol *)OSSymbol::withCString( name );
-    if ( sym ) {
-        setName( sym, plane );
-        sym->release();
-    }
+       OSSymbol * sym = (OSSymbol *)OSSymbol::withCString( name );
+       if (sym) {
+               setName( sym, plane );
+               sym->release();
+       }
 }
 
 }
 
-void IORegistryEntry::setLocation( const OSSymbol * location,
-                            const IORegistryPlane * plane )
+void
+IORegistryEntry::setName( const OSString * name,
+    const IORegistryPlane * plane )
 {
 {
-    const OSSymbol *   key;
+       const OSSymbol * sym = OSSymbol::withString( name );
+       if (sym) {
+               setName( sym, plane );
+               sym->release();
+       }
+}
 
 
-    if( location) {
-        if( plane)
-            key = plane->pathLocationKey;
-        else
-            key = gIOLocationKey;
+void
+IORegistryEntry::setLocation( const OSSymbol * location,
+    const IORegistryPlane * plane )
+{
+       const OSSymbol *    key;
 
 
-       WLOCK;
-        registryTable()->setObject( key, (OSObject *) location);
-       UNLOCK;
-    }
+       if (location) {
+               if (plane) {
+                       key = plane->pathLocationKey;
+               } else {
+                       key = gIOLocationKey;
+               }
+
+               WLOCK;
+               registryTable()->setObject( key, (OSObject *) location);
+               UNLOCK;
+       }
 }
 
 }
 
-void IORegistryEntry::setLocation( const char * location,
-                            const IORegistryPlane * plane )
+void
+IORegistryEntry::setLocation( const char * location,
+    const IORegistryPlane * plane )
 {
 {
-    OSSymbol * sym = (OSSymbol *)OSSymbol::withCString( location );
-    if ( sym ) {
-        setLocation( sym, plane );
-        sym->release();
-    }
+       OSSymbol * sym = (OSSymbol *)OSSymbol::withCString( location );
+       if (sym) {
+               setLocation( sym, plane );
+               sym->release();
+       }
 }
 
 bool
 IORegistryEntry::compareName( OSString * name, OSString ** matched ) const
 {
 }
 
 bool
 IORegistryEntry::compareName( OSString * name, OSString ** matched ) const
 {
-    const OSSymbol *   sym = copyName();
-    bool               isEqual;
+       const OSSymbol *    sym = copyName();
+       bool                isEqual;
 
 
-    isEqual = sym->isEqualTo( name );
+       isEqual = (sym && sym->isEqualTo(name));
 
 
-    if( isEqual && matched) {
-       name->retain();
-       *matched = name;
-    }
+       if (isEqual && matched) {
+               name->retain();
+               *matched = name;
+       }
 
 
-    if( sym)
-       sym->release();
+       if (sym) {
+               sym->release();
+       }
 
 
-    return( isEqual );
+       return isEqual;
 }
 
 bool
 IORegistryEntry::compareNames( OSObject * names, OSString ** matched ) const
 {
 }
 
 bool
 IORegistryEntry::compareNames( OSObject * names, OSString ** matched ) const
 {
-    OSString *         string;
-    OSCollection *     collection;
-    OSIterator *       iter = 0;
-    bool               result = false;
-
-    if( (collection = OSDynamicCast( OSCollection, names))) {
-       iter = OSCollectionIterator::withCollection( collection );
-       string = 0;
-    } else
-       string = OSDynamicCast( OSString, names);
-
-    do {
-       if( string)
-            result = compareName( string, matched );
-
-    } while( (false == result)
-       && iter && (string = OSDynamicCast( OSString, iter->getNextObject())));
-
-    if( iter)
-       iter->release();
-
-    return( result);
-}
-
-
-bool IORegistryEntry::getPath( char * path, int * length,
-                               const IORegistryPlane * plane ) const
+       OSString *          string;
+       OSCollection *      collection;
+       OSIterator *        iter = NULL;
+       bool                result = false;
+
+       if ((collection = OSDynamicCast( OSCollection, names))) {
+               iter = OSCollectionIterator::withCollection( collection );
+               string = NULL;
+       } else {
+               string = OSDynamicCast( OSString, names);
+       }
+
+       do {
+               if (string) {
+                       result = compareName( string, matched );
+               }
+       } while ((false == result)
+           && iter && (string = OSDynamicCast( OSString, iter->getNextObject())));
+
+       if (iter) {
+               iter->release();
+       }
+
+       return result;
+}
+
+
+bool
+IORegistryEntry::getPath(  char * path, int * length,
+    const IORegistryPlane * plane ) const
+{
+       OSArray *           stack;
+       IORegistryEntry *   root;
+       const IORegistryEntry * entry;
+       const IORegistryEntry * parent;
+       const OSSymbol *    alias;
+       int                 index;
+       int                 len, maxLength, compLen, aliasLen;
+       char *              nextComp;
+       bool                ok;
+
+       if (!path || !length || !plane) {
+               return false;
+       }
+
+       len = 0;
+       maxLength = *length - 2;
+       nextComp = path;
+
+       len = plane->nameKey->getLength();
+       if (len >= maxLength) {
+               return false;
+       }
+       strlcpy( nextComp, plane->nameKey->getCStringNoCopy(), len + 1);
+       nextComp[len++] = ':';
+       nextComp += len;
+
+       if ((alias = hasAlias( plane ))) {
+               aliasLen = alias->getLength();
+               len += aliasLen;
+               ok = (maxLength > len);
+               *length = len;
+               if (ok) {
+                       strlcpy( nextComp, alias->getCStringNoCopy(), aliasLen + 1);
+               }
+               return ok;
+       }
+
+       stack = OSArray::withCapacity( getDepth( plane ));
+       if (!stack) {
+               return false;
+       }
+
+       RLOCK;
+
+       parent = entry = this;
+       root = gRegistryRoot->getChildEntry( plane );
+       while (parent && (parent != root)) {
+               // stop below root
+               entry = parent;
+               parent = entry->getParentEntry( plane );
+               stack->setObject((OSObject *) entry );
+       }
+
+       ok = (NULL != parent);
+       if (ok) {
+               index = stack->getCount();
+               if (0 == index) {
+                       *nextComp++ = '/';
+                       *nextComp = 0;
+                       len++;
+               } else {
+                       while (ok && ((--index) >= 0)) {
+                               entry = (IORegistryEntry *) stack->getObject((unsigned int) index );
+                               assert( entry );
+
+                               if ((alias = entry->hasAlias( plane ))) {
+                                       len = plane->nameKey->getLength() + 1;
+                                       nextComp = path + len;
+
+                                       compLen = alias->getLength();
+                                       ok = (maxLength > (len + compLen));
+                                       if (ok) {
+                                               strlcpy( nextComp, alias->getCStringNoCopy(), compLen + 1);
+                                       }
+                               } else {
+                                       compLen = maxLength - len;
+                                       ok = entry->getPathComponent( nextComp + 1, &compLen, plane );
+
+                                       if (ok && compLen) {
+                                               compLen++;
+                                               *nextComp = '/';
+                                       }
+                               }
+
+                               if (ok) {
+                                       len += compLen;
+                                       nextComp += compLen;
+                               }
+                       }
+               }
+               *length = len;
+       }
+       UNLOCK;
+       stack->release();
+
+       return ok;
+}
+
+bool
+IORegistryEntry::getPathComponent( char * path, int * length,
+    const IORegistryPlane * plane ) const
 {
 {
-    OSArray *          stack;
-    IORegistryEntry *  root;
-    const IORegistryEntry * entry;
-    IORegistryEntry *  parent;
-    const OSSymbol *   alias;
-    int                        index;
-    int                        len, maxLength, compLen;
-    char *             nextComp;
-    bool               ok;
+       int                 len, locLen, maxLength;
+       const char *        compName;
+       const char *        loc;
+       bool                ok;
 
 
-   if( !path || !length || !plane)
-       return( false);
+       maxLength = *length;
 
 
-    len = 0;
-    maxLength = *length - 2;
-    nextComp = path;
+       compName = getName( plane );
+       len = strlen( compName );
+       if ((loc = getLocation( plane ))) {
+               locLen = 1 + strlen( loc );
+       } else {
+               locLen = 0;
+       }
 
 
-    len = plane->nameKey->getLength();
-    if( len >= maxLength)
-       return( false);
-    strcpy( nextComp, plane->nameKey->getCStringNoCopy());
-    nextComp[ len++ ] = ':';
-    nextComp += len;
-
-    if( (alias = hasAlias( plane ))) {
-       len += alias->getLength();
-       ok = (maxLength > len);
-       *length = len;
-       if( ok)
-           strcpy( nextComp, alias->getCStringNoCopy());
-       return( ok );
-    }
+       ok = ((len + locLen + 1) < maxLength);
+       if (ok) {
+               strlcpy( path, compName, len + 1 );
+               if (loc) {
+                       path += len;
+                       len += locLen;
+                       *path++ = '@';
+                       strlcpy( path, loc, locLen );
+               }
+               *length = len;
+       }
 
 
-    entry = this;
-    parent = entry->getParentEntry( plane );
-    if( !parent)
-       // Error if not attached in plane
-       return( false);
+       return ok;
+}
+
+const char *
+IORegistryEntry::matchPathLocation( const char * cmp,
+    const IORegistryPlane * plane )
+{
+       const char  *       str;
+       const char  *       result = NULL;
+       u_quad_t            num1, num2;
+       char                lastPathChar, lastLocationChar;
+
+       str = getLocation( plane );
+       if (str) {
+               lastPathChar = cmp[0];
+               lastLocationChar = str[0];
+               do {
+                       if (lastPathChar) {
+                               num1 = strtouq( cmp, (char **) &cmp, 16 );
+                               lastPathChar = *cmp++;
+                       } else {
+                               num1 = 0;
+                       }
+
+                       if (lastLocationChar) {
+                               num2 = strtouq( str, (char **) &str, 16 );
+                               lastLocationChar = *str++;
+                       } else {
+                               num2 = 0;
+                       }
+
+                       if (num1 != num2) {
+                               break;
+                       }
+
+                       if (!lastPathChar && !lastLocationChar) {
+                               result = cmp - 1;
+                               break;
+                       }
+
+                       if ((',' != lastPathChar) && (':' != lastPathChar)) {
+                               lastPathChar = 0;
+                       }
+
+                       if (lastPathChar && lastLocationChar && (lastPathChar != lastLocationChar)) {
+                               break;
+                       }
+               } while (true);
+       }
 
 
-    stack = OSArray::withCapacity( getDepth( plane ));
-    if( !stack)
-       return( false);
-
-    RLOCK;
-
-    root = gRegistryRoot->getChildEntry( plane );
-    while( parent && (entry != root)) {
-       // stop below root
-       stack->setObject( (OSObject *) entry );
-       entry = parent;
-       parent = entry->getParentEntry( plane );
-    }
-
-    index = stack->getCount();
-    ok = true;
-
-    if( 0 == index) {
-
-        *nextComp++ = '/';
-        *nextComp = 0;
-        len++;
-
-    } else while( ok && ((--index) >= 0)) {
-
-        entry = (IORegistryEntry *) stack->getObject((unsigned int) index );
-        assert( entry );
-
-        if( (alias = entry->hasAlias( plane ))) {
-            len = plane->nameKey->getLength() + 1;
-            nextComp = path + len;
-
-            compLen = alias->getLength();
-            ok = (maxLength > len + compLen);
-            if( ok)
-                strcpy( nextComp, alias->getCStringNoCopy());
-        } else {
-            compLen = maxLength - len;
-            ok = entry->getPathComponent( nextComp + 1, &compLen, plane );
-
-            if( ok && compLen) {
-                compLen++;
-                *nextComp = '/';
-            }
-        }
+       return result;
+}
+
+IORegistryEntry *
+IORegistryEntry::getChildFromComponent( const char ** opath,
+    const IORegistryPlane * plane )
+{
+       IORegistryEntry *   entry = NULL;
+       OSArray *           set;
+       unsigned int        index;
+       const char *        path;
+       const char *        cmp = NULL;
+       char                c;
+       size_t              len;
+       const char *        str;
+
+       set = getChildSetReference( plane );
+       if (set) {
+               path = *opath;
+
+               for (index = 0;
+                   (entry = (IORegistryEntry *) set->getObject(index));
+                   index++) {
+                       cmp = path;
+
+                       if (*cmp != '@') {
+                               str = entry->getName( plane );
+                               len = strlen( str );
+                               if (strncmp( str, cmp, len )) {
+                                       continue;
+                               }
+                               cmp += len;
+
+                               c = *cmp;
+                               if ((c == 0) || (c == '/') || (c == ':')) {
+                                       break;
+                               }
+                               if (c != '@') {
+                                       continue;
+                               }
+                       }
+                       cmp++;
+                       if ((cmp = entry->matchPathLocation( cmp, plane ))) {
+                               break;
+                       }
+               }
+               if (entry) {
+                       *opath = cmp;
+               }
+       }
 
 
-        if( ok) {
-            len += compLen;
-            nextComp += compLen;
-        }
-    }
-    *length = len;
-
-    UNLOCK;
-
-    stack->release();
-
-    return( ok );
-}
-
-bool IORegistryEntry::getPathComponent( char * path, int * length,
-                                        const IORegistryPlane * plane ) const
-{
-    int                        len, locLen, maxLength;
-    const char *       compName;
-    const char *       loc;
-    bool               ok;
-
-    maxLength = *length;
-
-    compName = getName( plane );
-    len = strlen( compName );
-    if( (loc = getLocation( plane )))
-       locLen = 1 + strlen( loc );
-    else
-       locLen = 0;
-
-    ok = ((len + locLen) < maxLength);
-    if( ok) {
-        strcpy( path, compName );
-       if( loc) {
-            path += len;
-            len += locLen;
-            *path++ = '@';
-            strcpy( path, loc );
-       }
-        *length = len;
-    }
-
-    return( ok );
+       return entry;
+}
+
+const OSSymbol *
+IORegistryEntry::hasAlias( const IORegistryPlane * plane,
+    char * opath, int * length ) const
+{
+       IORegistryEntry *   entry;
+       IORegistryEntry *   entry2;
+       const OSSymbol *    key;
+       const OSSymbol *    bestKey = NULL;
+       OSIterator *        iter;
+       OSData *            data;
+       const char *        path = "/aliases";
+
+       entry = IORegistryEntry::fromPath( path, plane );
+       if (entry) {
+               RLOCK;
+               if ((iter = OSCollectionIterator::withCollection(
+                           entry->getPropertyTable()))) {
+                       while ((key = (OSSymbol *) iter->getNextObject())) {
+                               data = (OSData *) entry->getProperty( key );
+                               path = (const char *) data->getBytesNoCopy();
+                               if ((entry2 = IORegistryEntry::fromPath( path, plane,
+                                   opath, length ))) {
+                                       if (this == entry2) {
+                                               if (!bestKey
+                                                   || (bestKey->getLength() > key->getLength())) {
+                                                       // pick the smallest alias
+                                                       bestKey = key;
+                                               }
+                                       }
+                                       entry2->release();
+                               }
+                       }
+                       iter->release();
+               }
+               entry->release();
+               UNLOCK;
+       }
+       return bestKey;
 }
 
 }
 
-const char * IORegistryEntry::matchPathLocation( const char * cmp,
-                               const IORegistryPlane * plane )
+const char *
+IORegistryEntry::dealiasPath(
+       const char **           opath,
+       const IORegistryPlane * plane )
 {
 {
-    const char *       str;
-    const char *       result = 0;
-    u_quad_t           num1, num2;
-    char               lastPathChar, lastLocationChar;
+       IORegistryEntry *   entry;
+       OSData *            data;
+       const char *        path = *opath;
+       const char *        rpath = NULL;
+       const char *        end;
+       char                c;
+       char                temp[kIOMaxPlaneName + 1];
+
+       if (path[0] == '/') {
+               return rpath;
+       }
+
+       // check for alias
+       end = path;
+       while ((c = *end++) && (c != '/') && (c != ':')) {
+       }
+       end--;
+       if ((end - path) < kIOMaxPlaneName) {
+               strlcpy( temp, path, end - path + 1 );
+
+               RLOCK;
+               entry = IORegistryEntry::fromPath( "/aliases", plane );
+               if (entry) {
+                       data = (OSData *) entry->getProperty( temp );
+                       if (data) {
+                               rpath = (const char *) data->getBytesNoCopy();
+                               if (rpath) {
+                                       *opath = end;
+                               }
+                       }
+                       entry->release();
+               }
+               UNLOCK;
+       }
+
+       return rpath;
+}
+
+IORegistryEntry *
+IORegistryEntry::fromPath(
+       const char *            path,
+       const IORegistryPlane * plane,
+       char *                  opath,
+       int *                   length,
+       IORegistryEntry *       fromEntry )
+{
+       IORegistryEntry *   where = NULL;
+       IORegistryEntry *   aliasEntry = NULL;
+       IORegistryEntry *   next;
+       const char *        alias;
+       const char *        end;
+       int                 len = 0;
+       int                 len2;
+       char                c;
+       char                temp[kIOMaxPlaneName + 1];
+
+       if (NULL == path) {
+               return NULL;
+       }
+
+       if (NULL == plane) {
+               // get plane name
+               end = strchr( path, ':' );
+               if (end && ((end - path) < kIOMaxPlaneName)) {
+                       strlcpy( temp, path, end - path + 1 );
+                       plane = getPlane( temp );
+                       path = end + 1;
+               }
+       }
+       if (NULL == plane) {
+               return NULL;
+       }
+
+       // check for alias
+       end = path;
+       if ((alias = dealiasPath( &end, plane))) {
+               if (length) {
+                       len = *length;
+               }
+               aliasEntry = IORegistryEntry::fromPath( alias, plane,
+                   opath, &len, fromEntry );
+               where = aliasEntry;
+               if (where) {
+                       path = end;
+               } else {
+                       len = 0;
+               }
+       }
+
+       RLOCK;
 
 
-    str = getLocation( plane );
-    if( str) {
-       lastPathChar = cmp[0];
-       lastLocationChar = str[0];
        do {
        do {
-            if( lastPathChar) {
-                num1 = strtouq( cmp, (char **) &cmp, 16 );
-                lastPathChar = *cmp++;
-           } else
-                num1 = 0;
-
-            if( lastLocationChar) {
-                num2 = strtouq( str, (char **) &str, 16 );
-                lastLocationChar = *str++;
-           } else
-                num2 = 0;
-
-            if( num1 != num2)
-                break;
-
-           if (!lastPathChar && !lastLocationChar) {
-                result = cmp - 1;
-                break;
-            }
-
-            if( (',' != lastPathChar) && (':' != lastPathChar))
-               lastPathChar = 0;
-
-           if (lastPathChar && lastLocationChar && (lastPathChar != lastLocationChar))
-                break;
-
-        } while( true);
-    }
-
-    return( result );
-}
-
-IORegistryEntry * IORegistryEntry::getChildFromComponent( const char ** opath,
-                               const IORegistryPlane * plane )
-{
-    IORegistryEntry *  entry = 0;
-    OSArray *          set;
-    unsigned int       index;
-    const char *       path;
-    const char *       cmp = 0;
-    char               c;
-    size_t             len;
-    const char *       str;
-
-    set = getChildSetReference( plane );
-    if( set) {
-
-       path = *opath;
-
-       for( index = 0;
-             (entry = (IORegistryEntry *) set->getObject(index));
-             index++ ) {
-
-            cmp = path;
-
-            if( *cmp != '@') {
-                str = entry->getName( plane );
-                len = strlen( str );
-                if( strncmp( str, cmp, len ))
-                    continue;
-                cmp += len;
-
-                c = *cmp;
-                if( (c == 0) || (c == '/') || (c == ':'))
-                    break;
-                if( c != '@')
-                    continue;
-            }
-            cmp++;
-            if( (cmp = entry->matchPathLocation( cmp, plane )))
-                break;
-        }
-        if( entry)
-            *opath = cmp;
-    }
-
-    return( entry );
-}
-
-const OSSymbol * IORegistryEntry::hasAlias( const IORegistryPlane * plane,
-                               char * opath, int * length ) const
-{
-    IORegistryEntry *  entry;
-    IORegistryEntry *  entry2;
-    const OSSymbol *   key;
-    const OSSymbol *   bestKey = 0;
-    OSIterator *       iter;
-    OSData *           data;
-    const char *       path = "/aliases";
-
-    entry = IORegistryEntry::fromPath( path, plane );
-    if( entry) {
-        RLOCK;
-        if( (iter = OSCollectionIterator::withCollection(
-                               entry->getPropertyTable() ))) {
-
-            while( (key = (OSSymbol *) iter->getNextObject())) {
-
-                data = (OSData *) entry->getProperty( key );
-                path = (const char *) data->getBytesNoCopy();
-                if( (entry2 = IORegistryEntry::fromPath( path, plane,
-                                               opath, length ))) {
-                    if( this == entry2) {
-                        if( !bestKey
-                        || (bestKey->getLength() > key->getLength()))
-                            // pick the smallest alias
-                            bestKey = key;
-                    }
-                   entry2->release();
+               if (NULL == where) {
+                       if ((NULL == fromEntry) && (*path++ == '/')) {
+                               fromEntry = gRegistryRoot->getChildEntry( plane );
+                       }
+                       where = fromEntry;
+                       if (NULL == where) {
+                               break;
+                       }
+               } else {
+                       c = *path++;
+                       if (c != '/') {
+                               if (c && (c != ':')) { // check valid terminator
+                                       where = NULL;
+                               }
+                               break;
+                       }
+               }
+               next = where->getChildFromComponent( &path, plane );
+               if (next) {
+                       where = next;
+               }
+       } while (next);
+
+       if (where) {
+               // check residual path
+               if (where != fromEntry) {
+                       path--;
                }
                }
-            }
-            iter->release();
-        }
-       entry->release();
+
+               if (opath && length) {
+                       // copy out residual path
+                       len2 = strlen( path );
+                       if ((len + len2) < *length) {
+                               strlcpy( opath + len, path, len2 + 1 );
+                       }
+                       *length = (len + len2);
+               } else if (path[0]) {
+                       // no residual path => must be no tail for success
+                       where = NULL;
+               }
+       }
+
+       if (where) {
+               where->retain();
+       }
+       if (aliasEntry) {
+               aliasEntry->release();
+       }
+
        UNLOCK;
        UNLOCK;
-    }
-    return( bestKey );
-}
-
-const char * IORegistryEntry::dealiasPath(
-                       const char **           opath,
-                       const IORegistryPlane * plane )
-{
-    IORegistryEntry *  entry;
-    OSData *           data;
-    const char *       path = *opath;
-    const char *       rpath = 0;
-    const char *       end;
-    char               c;
-    char               temp[ kIOMaxPlaneName + 1 ];
-
-    if( path[0] == '/')
-       return( rpath );
-
-    // check for alias
-    end = path;
-    while( (c = *end++) && (c != '/') && (c != ':'))
-        {}
-    end--;
-    if( (end - path) < kIOMaxPlaneName) {
-        strncpy( temp, path, end - path );
-        temp[ end - path ] = 0;
-
-        RLOCK;
-        entry = IORegistryEntry::fromPath( "/aliases", plane );
-        if( entry) {
-            data = (OSData *) entry->getProperty( temp );
-            if( data ) {
-                rpath = (const char *) data->getBytesNoCopy();
-                if( rpath)
-                    *opath = end;
-            }
-           entry->release();
-        }
-        UNLOCK;
-    }
-
-    return( rpath );
-}
-
-IORegistryEntry * IORegistryEntry::fromPath(
-                        const char *           path,
-                        const IORegistryPlane * plane,
-                        char *                 opath,
-                       int *                   length,
-                        IORegistryEntry *      fromEntry )
-{
-    IORegistryEntry *  where = 0;
-    IORegistryEntry *  aliasEntry = 0;
-    IORegistryEntry *  next;
-    const char *       alias;
-    const char *       end;
-    int                        len = 0;
-    int                        len2;
-    char               c;
-    char               temp[ kIOMaxPlaneName + 1 ];
-
-    if( 0 == path)
-       return( 0 );
-
-    if( 0 == plane) {
-       // get plane name
-        end = strchr( path, ':' );
-       if( end && ((end - path) < kIOMaxPlaneName)) {
-           strncpy( temp, path, end - path );
-           temp[ end - path ] = 0;
-            plane = getPlane( temp );
-           path = end + 1;
-       }
-    }
-    if( 0 == plane)
-       return( 0 );
-
-    // check for alias
-    end = path;
-    if( (alias = dealiasPath( &end, plane))) {
-        if( length)
-            len = *length;
-        aliasEntry = IORegistryEntry::fromPath( alias, plane,
-                                    opath, &len, fromEntry );
-        where = aliasEntry;
-        if( where)
-            path = end;
-        else
-            len = 0;
-    }
-
-    RLOCK;
-
-    do {
-        if( 0 == where) {
-            if( (0 == fromEntry) && (*path++ == '/'))
-                fromEntry = gRegistryRoot->getChildEntry( plane );
-            where = fromEntry;
-            if( 0 == where)
-                break;
-        } else {
-            c = *path++;
-            if( c != '/') {
-                if( c && (c != ':'))   // check valid terminator
-                    where = 0;
-                break;
-            }
-        }
-        next = where->getChildFromComponent( &path, plane );
-        if( next)
-            where = next;
-    } while( next );
-
-    if( where) {
-       // check residual path
-       if( where != fromEntry)
-            path--;
-
-       if( opath && length) {
-            // copy out residual path
-           len2 = len + strlen( path );
-           if( len2 < *length)
-                strcpy( opath + len, path );
-           *length = len2;
-
-       } else if( path[0])
-           // no residual path => must be no tail for success
-            where = 0;
-    }
-
-    if( where)
-       where->retain();
-    if( aliasEntry)
-        aliasEntry->release();
-
-    UNLOCK;
-
-    return( where );
-}
-
-IORegistryEntry * IORegistryEntry::childFromPath(
-                       const char *            path,
-                        const IORegistryPlane * plane,
-                        char *                 opath,
-                        int *                  len )
-{
-    return( IORegistryEntry::fromPath( path, plane, opath, len, this ));
+
+       return where;
+}
+
+IORegistryEntry *
+IORegistryEntry::childFromPath(
+       const char *            path,
+       const IORegistryPlane * plane,
+       char *                  opath,
+       int *                   len )
+{
+       return IORegistryEntry::fromPath( path, plane, opath, len, this );
 }
 
 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 }
 
 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
@@ -1372,481 +1520,632 @@ IORegistryEntry * IORegistryEntry::childFromPath(
 #undef super
 #define super OSObject
 
 #undef super
 #define super OSObject
 
-inline bool IORegistryEntry::arrayMember( OSArray * set,
-                                         const IORegistryEntry * member,
-                                       unsigned int * index ) const
+inline bool
+IORegistryEntry::arrayMember( OSArray * set,
+    const IORegistryEntry * member,
+    unsigned int * index ) const
 {
 {
-    int                i;
-    OSObject * probeObject;
+       int         i;
+       OSObject *  probeObject;
 
 
-    for( i = 0; (probeObject = set->getObject(i)); i++) {
-        if (probeObject == (OSObject *) member) {
-           if( index)
-                *index = i;
-            return( true );
+       for (i = 0; (probeObject = set->getObject(i)); i++) {
+               if (probeObject == (OSObject *) member) {
+                       if (index) {
+                               *index = i;
+                       }
+                       return true;
+               }
        }
        }
-    }
-    return( false );
+       return false;
 }
 
 }
 
-bool IORegistryEntry::makeLink( IORegistryEntry * to,
-                                unsigned int relation,
-                                const IORegistryPlane * plane ) const
-{
-    OSArray *  links;
-    bool       result = false;
-
-    if( (links = (OSArray *)
-               registryTable()->getObject( plane->keys[ relation ] ))) {
-
-       result = arrayMember( links, to );
-       if( !result)
-            result = links->setObject( to );
-
-    } else {
-
-       links = OSArray::withObjects( (const OSObject **) &to, 1, 1 );
-       result = (links != 0);
-       if( result) {
-           result = registryTable()->setObject( plane->keys[ relation ],
-                                          links );
-            links->release();
+bool
+IORegistryEntry::makeLink( IORegistryEntry * to,
+    unsigned int relation,
+    const IORegistryPlane * plane ) const
+{
+       OSArray *   links;
+       bool        result = false;
+
+       if ((links = (OSArray *)
+           registryTable()->getObject( plane->keys[relation] ))) {
+               result = arrayMember( links, to );
+               if (!result) {
+                       result = links->setObject( to );
+               }
+       } else {
+               links = OSArray::withObjects((const OSObject **) &to, 1, 1 );
+               result = (links != NULL);
+               if (result) {
+                       result = registryTable()->setObject( plane->keys[relation],
+                           links );
+                       links->release();
+               }
        }
        }
-    }
+       reserved->fRegistryEntryGenerationCount++;
 
 
-    return( result);
+       return result;
 }
 
 }
 
-void IORegistryEntry::breakLink( IORegistryEntry * to,
-                                 unsigned int relation,
-                                 const IORegistryPlane * plane ) const
-{
-    OSArray *          links;
-    unsigned int       index;
-
-    if( (links = (OSArray *)
-               registryTable()->getObject( plane->keys[ relation ]))) {
-
-       if( arrayMember( links, to, &index )) {
-            links->removeObject( index );
-           if( 0 == links->getCount())
-                registryTable()->removeObject( plane->keys[ relation ]);
-           }
-    }
+void
+IORegistryEntry::breakLink( IORegistryEntry * to,
+    unsigned int relation,
+    const IORegistryPlane * plane ) const
+{
+       OSArray *           links;
+       unsigned int        index;
+
+       if ((links = (OSArray *)
+           registryTable()->getObject( plane->keys[relation]))) {
+               if (arrayMember( links, to, &index )) {
+                       links->removeObject( index );
+                       if (0 == links->getCount()) {
+                               registryTable()->removeObject( plane->keys[relation]);
+                       }
+               }
+       }
+       reserved->fRegistryEntryGenerationCount++;
 }
 
 
 }
 
 
-OSArray * IORegistryEntry::getParentSetReference(
-                               const IORegistryPlane * plane ) const
+OSArray *
+IORegistryEntry::getParentSetReference(
+       const IORegistryPlane * plane ) const
 {
 {
-    if( plane)
-        return( (OSArray *) registryTable()->getObject(
-                            plane->keys[ kParentSetIndex ]));
-    else
-       return( 0 );
+       if (plane) {
+               return (OSArray *) registryTable()->getObject(
+                       plane->keys[kParentSetIndex]);
+       } else {
+               return NULL;
+       }
 }
 
 }
 
-OSIterator * IORegistryEntry::getParentIterator(
-                               const IORegistryPlane * plane ) const
+OSIterator *
+IORegistryEntry::getParentIterator(
+       const IORegistryPlane * plane ) const
 {
 {
-    OSArray *          links;
-    OSIterator *       iter;
+       OSArray *           links;
+       OSIterator *        iter;
 
 
-    if( !plane)
-       return( 0 );
+       if (!plane) {
+               return NULL;
+       }
 
 
-    RLOCK;
-    links = getParentSetReference( plane );
-    if( 0 == links)
-       links = OSArray::withCapacity( 1 );
-    else
-       links = OSArray::withArray( links, links->getCount() );
-    UNLOCK;
+       RLOCK;
+       links = getParentSetReference( plane );
+       if (NULL == links) {
+               links = OSArray::withCapacity( 1 );
+       } else {
+               links = OSArray::withArray( links, links->getCount());
+       }
+       UNLOCK;
 
 
-    iter = IOLinkIterator::withCollection( links );
+       iter = IOLinkIterator::withCollection( links );
 
 
-    if( links)
-        links->release();
+       if (links) {
+               links->release();
+       }
 
 
-    return( iter );
+       return iter;
 }
 
 }
 
-IORegistryEntry * IORegistryEntry::copyParentEntry( const IORegistryPlane * plane ) const
+IORegistryEntry *
+IORegistryEntry::copyParentEntry( const IORegistryPlane * plane ) const
 {
 {
-    IORegistryEntry *  entry = 0;
-    OSArray *          links;
+       IORegistryEntry *   entry = NULL;
+       OSArray *           links;
 
 
-    RLOCK;
+       RLOCK;
 
 
-    if( (links = getParentSetReference( plane ))) {
-        entry = (IORegistryEntry *) links->getObject( 0 );
-        entry->retain();
-    }
+       if ((links = getParentSetReference( plane ))) {
+               entry = (IORegistryEntry *) links->getObject( 0 );
+               entry->retain();
+       }
 
 
-    UNLOCK;
+       UNLOCK;
 
 
-    return( entry);
+       return entry;
 }
 
 }
 
-IORegistryEntry * IORegistryEntry::getParentEntry( const IORegistryPlane * plane ) const
+IORegistryEntry *
+IORegistryEntry::getParentEntry( const IORegistryPlane * plane ) const
 {
 {
-    IORegistryEntry * entry;
+       IORegistryEntry * entry;
 
 
-    entry = copyParentEntry( plane );
-    if( entry)
-        entry->release();
+       entry = copyParentEntry( plane );
+       if (entry) {
+               entry->release();
+       }
 
 
-    return( entry );
+       return entry;
 }
 
 }
 
-OSArray * IORegistryEntry::getChildSetReference( const IORegistryPlane * plane ) const
+OSArray *
+IORegistryEntry::getChildSetReference( const IORegistryPlane * plane ) const
 {
 {
-    if( plane)
-        return( (OSArray *) registryTable()->getObject(
-                            plane->keys[ kChildSetIndex ]));
-    else
-       return( 0 );
+       if (plane) {
+               return (OSArray *) registryTable()->getObject(
+                       plane->keys[kChildSetIndex]);
+       } else {
+               return NULL;
+       }
 }
 
 }
 
-OSIterator * IORegistryEntry::getChildIterator( const IORegistryPlane * plane ) const
+OSIterator *
+IORegistryEntry::getChildIterator( const IORegistryPlane * plane ) const
 {
 {
-    OSArray *          links;
-    OSIterator *       iter;
+       OSArray *           links;
+       OSIterator *        iter;
 
 
-    if( !plane)
-       return( 0 );
+       if (!plane) {
+               return NULL;
+       }
 
 
-    RLOCK;
-    links = getChildSetReference( plane );
-    if( 0 == links)
-        links = OSArray::withCapacity( 1 );
-    else
-        links = OSArray::withArray( links, links->getCount() );
-    UNLOCK;
+       RLOCK;
+       links = getChildSetReference( plane );
+       if (NULL == links) {
+               links = OSArray::withCapacity( 1 );
+       } else {
+               links = OSArray::withArray( links, links->getCount());
+       }
+       UNLOCK;
 
 
-    iter = IOLinkIterator::withCollection( links );
+       iter = IOLinkIterator::withCollection( links );
 
 
-    if( links)
-        links->release();
+       if (links) {
+               links->release();
+       }
 
 
-    return( iter );
+       return iter;
 }
 
 }
 
+uint32_t
+IORegistryEntry::getChildCount( const IORegistryPlane * plane ) const
+{
+       OSArray * links;
+       uint32_t  count = 0;
 
 
-IORegistryEntry * IORegistryEntry::copyChildEntry(
-                               const IORegistryPlane * plane ) const
+       RLOCK;
+       links = getChildSetReference( plane );
+       if (links) {
+               count = links->getCount();
+       }
+       UNLOCK;
+
+       return count;
+}
+
+IORegistryEntry *
+IORegistryEntry::copyChildEntry(
+       const IORegistryPlane * plane ) const
 {
 {
-    IORegistryEntry *  entry = 0;
-    OSArray *          links;
+       IORegistryEntry *   entry = NULL;
+       OSArray *           links;
 
 
-    RLOCK;
+       RLOCK;
 
 
-    if( (links = getChildSetReference( plane ))) {
-       entry = (IORegistryEntry *) links->getObject( 0 );
-        entry->retain();
-    }
+       if ((links = getChildSetReference( plane ))) {
+               entry = (IORegistryEntry *) links->getObject( 0 );
+               entry->retain();
+       }
 
 
-    UNLOCK;
+       UNLOCK;
 
 
-    return( entry);
+       return entry;
 }
 
 }
 
-IORegistryEntry * IORegistryEntry::getChildEntry(
-                               const IORegistryPlane * plane ) const
+IORegistryEntry *
+IORegistryEntry::getChildEntry(
+       const IORegistryPlane * plane ) const
 {
 {
-    IORegistryEntry * entry;
+       IORegistryEntry * entry;
 
 
-    entry = copyChildEntry( plane );
-    if( entry)
-        entry->release();
-        
-    return( entry );
+       entry = copyChildEntry( plane );
+       if (entry) {
+               entry->release();
+       }
+
+       return entry;
 }
 
 }
 
-void IORegistryEntry::applyToChildren( IORegistryEntryApplierFunction applier,
-                                       void * context,
-                                       const IORegistryPlane * plane ) const
+void
+IORegistryEntry::applyToChildren( IORegistryEntryApplierFunction applier,
+    void * context,
+    const IORegistryPlane * plane ) const
 {
 {
-    OSArray *          array;
-    unsigned int       index;
-    IORegistryEntry *  next;
+       OSArray *           array;
+       unsigned int        index;
+       IORegistryEntry *   next;
 
 
-    if( !plane)
-        return;
+       if (!plane) {
+               return;
+       }
 
 
-    RLOCK;
-    array = OSArray::withArray( getChildSetReference( plane ));
-    UNLOCK;
-    if( array) {
-        for( index = 0;
-             (next = (IORegistryEntry *) array->getObject( index ));
-             index++)
-            (*applier)(next, context);
-        array->release();
-    }
+       RLOCK;
+       array = OSArray::withArray( getChildSetReference( plane ));
+       UNLOCK;
+       if (array) {
+               for (index = 0;
+                   (next = (IORegistryEntry *) array->getObject( index ));
+                   index++) {
+                       (*applier)(next, context);
+               }
+               array->release();
+       }
 }
 
 }
 
-void IORegistryEntry::applyToParents( IORegistryEntryApplierFunction applier,
-                                      void * context,
-                                      const IORegistryPlane * plane ) const
+void
+IORegistryEntry::applyToParents( IORegistryEntryApplierFunction applier,
+    void * context,
+    const IORegistryPlane * plane ) const
 {
 {
-    OSArray *          array;
-    unsigned int       index;
-    IORegistryEntry *  next;
+       OSArray *           array;
+       unsigned int        index;
+       IORegistryEntry *   next;
 
 
-    if( !plane)
-        return;
+       if (!plane) {
+               return;
+       }
 
 
-    RLOCK;
-    array = OSArray::withArray( getParentSetReference( plane ));
-    UNLOCK;
-    if( array) {
-        for( index = 0;
-             (next = (IORegistryEntry *) array->getObject( index ));
-             index++)
-            (*applier)(next, context);
-        array->release();
-    }
+       RLOCK;
+       array = OSArray::withArray( getParentSetReference( plane ));
+       UNLOCK;
+       if (array) {
+               for (index = 0;
+                   (next = (IORegistryEntry *) array->getObject( index ));
+                   index++) {
+                       (*applier)(next, context);
+               }
+               array->release();
+       }
 }
 
 }
 
-bool IORegistryEntry::isChild( IORegistryEntry * child,
-                                const IORegistryPlane * plane,
-                               bool onlyChild ) const
+bool
+IORegistryEntry::isChild( IORegistryEntry * child,
+    const IORegistryPlane * plane,
+    bool onlyChild ) const
 {
 {
-    OSArray *  links;
-    bool       ret = false;
+       OSArray *   links;
+       bool        ret = false;
 
 
-    RLOCK;
+       RLOCK;
 
 
-    if( (links = getChildSetReference( plane ))) {
-       if( (!onlyChild) || (1 == links->getCount()))
-            ret = arrayMember( links, child );
-    }
-    if( ret && (links = child->getParentSetReference( plane )))
-       ret = arrayMember( links, this );
+       if ((links = getChildSetReference( plane ))) {
+               if ((!onlyChild) || (1 == links->getCount())) {
+                       ret = arrayMember( links, child );
+               }
+       }
+       if (ret && (links = child->getParentSetReference( plane ))) {
+               ret = arrayMember( links, this );
+       }
 
 
-    UNLOCK;
+       UNLOCK;
 
 
-    return( ret);
+       return ret;
 }
 
 }
 
-bool IORegistryEntry::isParent( IORegistryEntry * parent,
-                                const IORegistryPlane * plane,
-                               bool onlyParent ) const
-
+bool
+IORegistryEntry::isParent( IORegistryEntry * parent,
+    const IORegistryPlane * plane,
+    bool onlyParent ) const
 {
 {
-    OSArray *  links;
-    bool       ret = false;
+       OSArray *   links;
+       bool        ret = false;
 
 
-    RLOCK;
+       RLOCK;
 
 
-    if( (links = getParentSetReference( plane ))) {
-       if( (!onlyParent) || (1 == links->getCount()))
-            ret = arrayMember( links, parent );
-    }
-    if( ret && (links = parent->getChildSetReference( plane )))
-       ret = arrayMember( links, this );
+       if ((links = getParentSetReference( plane ))) {
+               if ((!onlyParent) || (1 == links->getCount())) {
+                       ret = arrayMember( links, parent );
+               }
+       }
+       if (ret && (links = parent->getChildSetReference( plane ))) {
+               ret = arrayMember( links, this );
+       }
 
 
-    UNLOCK;
+       UNLOCK;
 
 
-    return( ret);
+       return ret;
 }
 
 }
 
-bool IORegistryEntry::inPlane( const IORegistryPlane * plane ) const
+bool
+IORegistryEntry::inPlane( const IORegistryPlane * plane ) const
 {
 {
-    bool ret;
+       bool ret;
 
 
-    RLOCK;
+       RLOCK;
 
 
-    ret = (0 != getParentSetReference( plane ));
+       if (plane) {
+               ret = (NULL != getParentSetReference( plane ));
+       } else {
+               // Check to see if this is in any plane.  If it is in a plane
+               // then the registryTable will contain a key with the ParentLinks
+               // suffix.  When we iterate over the keys looking for that suffix
+               ret = false;
+
+               OSCollectionIterator *iter =
+                   OSCollectionIterator::withCollection( registryTable());
+               if (iter) {
+                       const OSSymbol *key;
+
+                       while ((key = (OSSymbol *) iter->getNextObject())) {
+                               size_t keysuffix;
+
+                               // Get a pointer to this keys suffix
+                               keysuffix = key->getLength();
+                               if (keysuffix <= kIORegPlaneParentSuffixLen) {
+                                       continue;
+                               }
+                               keysuffix -= kIORegPlaneParentSuffixLen;
+                               if (!strncmp(key->getCStringNoCopy() + keysuffix,
+                                   kIORegPlaneParentSuffix,
+                                   kIORegPlaneParentSuffixLen + 1)) {
+                                       ret = true;
+                                       break;
+                               }
+                       }
+                       iter->release();
+               }
+       }
 
 
-    UNLOCK;
+       UNLOCK;
 
 
-    return( ret );
+       return ret;
 }
 
 }
 
-bool IORegistryEntry::attachToParent( IORegistryEntry * parent,
-                                const IORegistryPlane * plane )
+bool
+IORegistryEntry::attachToParent( IORegistryEntry * parent,
+    const IORegistryPlane * plane )
 {
 {
-    OSArray *  links;
-    bool       ret;
-    bool       needParent;
+       OSArray *   links;
+       bool        ret;
+       bool        needParent;
+       bool        traceName = false;
 
 
-    if( this == parent)
-       return( false );
+       if (this == parent) {
+               return false;
+       }
 
 
-    WLOCK;
+       WLOCK;
 
 
-    ret = makeLink( parent, kParentSetIndex, plane );
+       if (!reserved->fRegistryEntryID) {
+               reserved->fRegistryEntryID = ++gIORegistryLastID;
+               traceName = (0 != gIOKitTrace);
+       }
 
 
-    if( (links = parent->getChildSetReference( plane )))
-       needParent = (false == arrayMember( links, this ));
-    else
-       needParent = true;
+       ret = makeLink( parent, kParentSetIndex, plane );
 
 
-//    ret &= parent->makeLink( this, kChildSetIndex, plane );
+       if ((links = parent->getChildSetReference( plane ))) {
+               needParent = (false == arrayMember( links, this ));
+       } else {
+               needParent = true;
+       }
 
 
-    UNLOCK;
+       UNLOCK;
 
 
-    if( needParent)
-        ret &= parent->attachToChild( this, plane );
+       if (traceName) {
+               uint64_t str_id = 0;
+               uint64_t __unused regID = getRegistryEntryID();
+               kernel_debug_string(IODBG_IOREGISTRY(IOREGISTRYENTRY_NAME_STRING), &str_id, getName());
+               KERNEL_DEBUG_CONSTANT(IODBG_IOREGISTRY(IOREGISTRYENTRY_NAME),
+                   (uintptr_t) regID,
+                   (uintptr_t) (regID >> 32),
+                   (uintptr_t) str_id,
+                   (uintptr_t) (str_id >> 32),
+                   0);
+       }
 
 
-    return( ret );
+       PLOCK;
+
+       // Mark any collections in the property list as immutable
+       OSDictionary *ptable = getPropertyTable();
+       OSCollectionIterator *iter =
+           OSCollectionIterator::withCollection( ptable );
+       if (iter) {
+               const OSSymbol *key;
+
+               while ((key = (OSSymbol *) iter->getNextObject())) {
+                       // Is object for key a collection?
+                       OSCollection *coll =
+                           OSDynamicCast( OSCollection, ptable->getObject( key ));
+
+                       if (coll) {
+                               // Yup so mark it as immutable
+                               coll->setOptions( OSCollection::kMASK,
+                                   OSCollection::kImmutable );
+                       }
+               }
+               iter->release();
+       }
+
+       PUNLOCK;
+
+       if (needParent) {
+               ret &= parent->attachToChild( this, plane );
+       }
+
+       return ret;
 }
 
 }
 
-bool IORegistryEntry::attachToChild( IORegistryEntry * child,
-                                        const IORegistryPlane * plane )
+uint64_t
+IORegistryEntry::getRegistryEntryID( void )
 {
 {
-    OSArray *  links;
-    bool       ret;
-    bool       needChild;
+       if (reserved) {
+               return reserved->fRegistryEntryID;
+       } else {
+               return 0;
+       }
+}
 
 
-    if( this == child)
-       return( false );
+bool
+IORegistryEntry::attachToChild( IORegistryEntry * child,
+    const IORegistryPlane * plane )
+{
+       OSArray *   links;
+       bool        ret;
+       bool        needChild;
 
 
-    WLOCK;
+       if (this == child) {
+               return false;
+       }
 
 
-    ret = makeLink( child, kChildSetIndex, plane );
+       WLOCK;
 
 
-    if( (links = child->getParentSetReference( plane )))
-       needChild = (false == arrayMember( links, this ));
-    else
-       needChild = true;
+       ret = makeLink( child, kChildSetIndex, plane );
 
 
-    UNLOCK;
+       if ((links = child->getParentSetReference( plane ))) {
+               needChild = (false == arrayMember( links, this ));
+       } else {
+               needChild = true;
+       }
 
 
-    if( needChild)
-       ret &= child->attachToParent( this, plane );
+       UNLOCK;
 
 
-    return( ret );
+       if (needChild) {
+               ret &= child->attachToParent( this, plane );
+       }
+
+       return ret;
 }
 
 }
 
-void IORegistryEntry::detachFromParent( IORegistryEntry * parent,
-                                const IORegistryPlane * plane )
+void
+IORegistryEntry::detachFromParent( IORegistryEntry * parent,
+    const IORegistryPlane * plane )
 {
 {
-    OSArray *  links;
-    bool       needParent;
+       OSArray *   links;
+       bool        needParent;
 
 
-    WLOCK;
+       WLOCK;
 
 
-    parent->retain();
+       parent->retain();
 
 
-    breakLink( parent, kParentSetIndex, plane );
+       breakLink( parent, kParentSetIndex, plane );
 
 
-    if( (links = parent->getChildSetReference( plane )))
-       needParent = arrayMember( links, this );
-    else
-       needParent = false;
+       if ((links = parent->getChildSetReference( plane ))) {
+               needParent = arrayMember( links, this );
+       } else {
+               needParent = false;
+       }
 
 //    parent->breakLink( this, kChildSetIndex, plane );
 
 
 //    parent->breakLink( this, kChildSetIndex, plane );
 
-    UNLOCK;
+       UNLOCK;
 
 
-    if( needParent)
-       parent->detachFromChild( this, plane );
+       if (needParent) {
+               parent->detachFromChild( this, plane );
+       }
 
 
-    parent->release();
+       parent->release();
 }
 
 }
 
-void IORegistryEntry::detachFromChild( IORegistryEntry * child,
-                                const IORegistryPlane * plane )
+void
+IORegistryEntry::detachFromChild( IORegistryEntry * child,
+    const IORegistryPlane * plane )
 {
 {
-    OSArray *          links;
-    bool       needChild;
+       OSArray *           links;
+       bool        needChild;
 
 
-    WLOCK;
+       WLOCK;
 
 
-    child->retain();
+       child->retain();
 
 
-    breakLink( child, kChildSetIndex, plane );
+       breakLink( child, kChildSetIndex, plane );
 
 
-    if( (links = child->getParentSetReference( plane )))
-       needChild = arrayMember( links, this );
-    else
-       needChild = false;
+       if ((links = child->getParentSetReference( plane ))) {
+               needChild = arrayMember( links, this );
+       } else {
+               needChild = false;
+       }
 
 
-    UNLOCK;
+       UNLOCK;
 
 
-    if( needChild)
-       child->detachFromParent( this, plane );
+       if (needChild) {
+               child->detachFromParent( this, plane );
+       }
 
 
-    child->release();
+       child->release();
 }
 
 }
 
-void IORegistryEntry::detachAbove( const IORegistryPlane * plane )
+void
+IORegistryEntry::detachAbove( const IORegistryPlane * plane )
 {
 {
-    IORegistryEntry *  parent;
+       IORegistryEntry *   parent;
 
 
-    retain();
-    while( (parent = getParentEntry( plane )))
-       detachFromParent( parent, plane );
-    release();
+       retain();
+       while ((parent = copyParentEntry( plane ))) {
+               detachFromParent( parent, plane );
+               parent->release();
+       }
+       release();
 }
 
 }
 
-void IORegistryEntry::detachAll( const IORegistryPlane * plane )
+void
+IORegistryEntry::detachAll( const IORegistryPlane * plane )
 {
 {
-    OSOrderedSet *             all;
-    IORegistryEntry *          next;
-    IORegistryIterator *       regIter;
-
-    regIter = IORegistryIterator::iterateOver( this, plane, true );
-    if( 0 == regIter)
-       return;
-    all = regIter->iterateAll();
-    regIter->release();
+       OSOrderedSet *              all;
+       IORegistryEntry *           next;
+       IORegistryIterator *        regIter;
 
 
-    detachAbove( plane );
-    if( all) {
-       while( (next = (IORegistryEntry *) all->getLastObject())) {
+       regIter = IORegistryIterator::iterateOver( this, plane, true );
+       if (NULL == regIter) {
+               return;
+       }
+       all = regIter->iterateAll();
+       regIter->release();
 
 
-            next->retain();
-            all->removeObject(next);
+       detachAbove( plane );
+       if (all) {
+               while ((next = (IORegistryEntry *) all->getLastObject())) {
+                       next->retain();
+                       all->removeObject(next);
 
 
-            next->detachAbove( plane );
-            next->release();
-        }
-        all->release();
-    }
+                       next->detachAbove( plane );
+                       next->release();
+               }
+               all->release();
+       }
 }
 
 }
 
-unsigned int IORegistryEntry::getDepth( const IORegistryPlane * plane ) const
+unsigned int
+IORegistryEntry::getDepth( const IORegistryPlane * plane ) const
 {
 {
-    unsigned int               depth = 1;
-    OSArray *                  parents;
-    unsigned int               oneDepth, maxParentDepth, count;
-    IORegistryEntry *          one;
-    const IORegistryEntry *    next;
-    unsigned int               index;
-
-    RLOCK;
+       unsigned int                depth = 1;
+       OSArray *                   parents;
+       unsigned int                oneDepth, maxParentDepth, count;
+       IORegistryEntry *           one;
+       const IORegistryEntry *     next;
+       unsigned int                index;
 
 
-    next = this;
-    while( (parents = next->getParentSetReference( plane ))) {
+       RLOCK;
 
 
-       count = parents->getCount();
-       if( 0 == count)
-           break;
-       if( 1 == count) {
-            depth++;
-            next = (IORegistryEntry *) parents->getObject( 0 );
-       } else {
-           // painful
-           maxParentDepth = 0;
-           for( index = 0;
-                (one = (IORegistryEntry *) parents->getObject( index ));
-                index++ ) {
-                oneDepth = one->getDepth( plane );
-                if( oneDepth > maxParentDepth)
-                    maxParentDepth = oneDepth;
-            }
-            depth += maxParentDepth;
-           break;
+       next = this;
+       while ((parents = next->getParentSetReference( plane ))) {
+               count = parents->getCount();
+               if (0 == count) {
+                       break;
+               }
+               if (1 == count) {
+                       depth++;
+                       next = (IORegistryEntry *) parents->getObject( 0 );
+               } else {
+                       // painful
+                       maxParentDepth = 0;
+                       for (index = 0;
+                           (one = (IORegistryEntry *) parents->getObject( index ));
+                           index++) {
+                               oneDepth = one->getDepth( plane );
+                               if (oneDepth > maxParentDepth) {
+                                       maxParentDepth = oneDepth;
+                               }
+                       }
+                       depth += maxParentDepth;
+                       break;
+               }
        }
        }
-    }
 
 
-    UNLOCK;
+       UNLOCK;
 
 
-    return( depth);
+       return depth;
 }
 
 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 }
 
 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
@@ -1862,221 +2161,247 @@ enum { kIORegistryIteratorInvalidFlag = 0x80000000 };
 
 IORegistryIterator *
 IORegistryIterator::iterateOver( IORegistryEntry * root,
 
 IORegistryIterator *
 IORegistryIterator::iterateOver( IORegistryEntry * root,
-                                 const IORegistryPlane * plane,
-                                 IOOptionBits options )
+    const IORegistryPlane * plane,
+    IOOptionBits options )
 {
 {
-    IORegistryIterator *       create;
+       IORegistryIterator *        create;
 
 
-    if( 0 == root)
-       return( 0);
-    if( 0 == plane)
-       return( 0);
-
-    create = new IORegistryIterator;
-    if( create) {
-        if( create->init()) {
-
-            root->retain();
-            create->root = root;
-            create->where = &create->start;
-            create->start.current = root;
-            create->plane = plane;
-            create->options = options & ~kIORegistryIteratorInvalidFlag;
+       if (NULL == root) {
+               return NULL;
+       }
+       if (NULL == plane) {
+               return NULL;
+       }
 
 
-       } else {
-           create->release();
-           create = 0;
+       create = new IORegistryIterator;
+       if (create) {
+               if (create->init()) {
+                       root->retain();
+                       create->root = root;
+                       create->where = &create->start;
+                       create->start.current = root;
+                       create->plane = plane;
+                       create->options = options & ~kIORegistryIteratorInvalidFlag;
+               } else {
+                       create->release();
+                       create = NULL;
+               }
        }
        }
-    }
-    return( create);
+       return create;
 }
 
 IORegistryIterator *
 IORegistryIterator::iterateOver( const IORegistryPlane * plane,
 }
 
 IORegistryIterator *
 IORegistryIterator::iterateOver( const IORegistryPlane * plane,
-                                IOOptionBits options )
+    IOOptionBits options )
 {
 {
-    return( iterateOver( gRegistryRoot, plane, options ));
+       return iterateOver( gRegistryRoot, plane, options );
 }
 
 }
 
-bool IORegistryIterator::isValid( void )
+bool
+IORegistryIterator::isValid( void )
 {
 {
-    bool               ok;
-    IORegCursor *      next;
+       bool                ok;
+       IORegCursor *       next;
 
 
-    next = where;
+       next = where;
 
 
-    RLOCK;
+       RLOCK;
 
 
-    ok = (0 == (kIORegistryIteratorInvalidFlag & options));
+       ok = (0 == (kIORegistryIteratorInvalidFlag & options));
 
 
-    while( ok && next) {
-       if( where->iter)
-            ok = where->iter->isValid();
-       next = next->next;
-    }
-    UNLOCK;
+       while (ok && next) {
+               if (where->iter) {
+                       ok = where->iter->isValid();
+               }
+               next = next->next;
+       }
+       UNLOCK;
 
 
-    return( ok);
+       return ok;
 }
 
 }
 
-void IORegistryIterator::enterEntry( const IORegistryPlane * enterPlane )
+void
+IORegistryIterator::enterEntry( const IORegistryPlane * enterPlane )
 {
 {
-    IORegCursor *      prev;
+       IORegCursor *       prev;
 
 
-    prev = where;
-    where = (IORegCursor *) IOMalloc( sizeof( IORegCursor));
-    assert( where);
+       prev = where;
+       where = (IORegCursor *) IOMalloc( sizeof(IORegCursor));
+       assert( where);
 
 
-    if( where) {
-        where->iter = 0;
-        where->next = prev;
-        where->current = prev->current;
-        plane = enterPlane;
-    }
+       if (where) {
+               where->iter = NULL;
+               where->next = prev;
+               where->current = prev->current;
+               plane = enterPlane;
+       }
 }
 
 }
 
-void IORegistryIterator::enterEntry( void )
+void
+IORegistryIterator::enterEntry( void )
 {
 {
-    enterEntry( plane );
+       enterEntry( plane );
 }
 
 }
 
-bool IORegistryIterator::exitEntry( void )
+bool
+IORegistryIterator::exitEntry( void )
 {
 {
-    IORegCursor *      gone;
-
-    if( where->iter) {
-       where->iter->release();
-       where->iter = 0;
-        if( where->current)// && (where != &start))
-            where->current->release();
-    }
+       IORegCursor *       gone;
 
 
-    if( where != &start) {
-       gone = where;
-        where = gone->next;
-        IOFree( gone, sizeof( IORegCursor));
-       return( true);
+       if (where->iter) {
+               where->iter->release();
+               where->iter = NULL;
+               if (where->current) {// && (where != &start))
+                       where->current->release();
+               }
+       }
 
 
-    } else
-        return( false);
+       if (where != &start) {
+               gone = where;
+               where = gone->next;
+               IOFree( gone, sizeof(IORegCursor));
+               return true;
+       } else {
+               return false;
+       }
 }
 
 }
 
-void IORegistryIterator::reset( void )
+void
+IORegistryIterator::reset( void )
 {
 {
-    while( exitEntry())
-       {}
+       while (exitEntry()) {
+       }
 
 
-    if( done) {
-       done->release();
-       done = 0;
-    }
+       if (done) {
+               done->release();
+               done = NULL;
+       }
 
 
-    where->current = root;
-    options &= ~kIORegistryIteratorInvalidFlag;
+       where->current = root;
+       options &= ~kIORegistryIteratorInvalidFlag;
 }
 
 }
 
-void IORegistryIterator::free( void )
+void
+IORegistryIterator::free( void )
 {
 {
-    reset();
+       reset();
 
 
-    if( root)
-        root->release();
+       if (root) {
+               root->release();
+       }
 
 
-    super::free();
+       super::free();
 }
 
 
 }
 
 
-IORegistryEntry * IORegistryIterator::getNextObjectFlat( void )
+IORegistryEntry *
+IORegistryIterator::getNextObjectFlat( void )
 {
 {
-    IORegistryEntry *  next = 0;
-    OSArray *          links = 0;
-
-    RLOCK;
-
-    if( (0 == where->iter)) {
-       // just entered - create new iter
-       if( isValid()
-        &&  where->current
-        &&  (links = ( (options & kIORegistryIterateParents) ?
-                        where->current->getParentSetReference( plane ) :
-                        where->current->getChildSetReference( plane ) )) )
+       IORegistryEntry *   next = NULL;
+       OSArray *           links = NULL;
 
 
-            where->iter = OSCollectionIterator::withCollection( links );
+       RLOCK;
 
 
-    } else
+       if ((NULL == where->iter)) {
+               // just entered - create new iter
+               if (isValid()
+                   && where->current
+                   && (links = ((options & kIORegistryIterateParents) ?
+                   where->current->getParentSetReference( plane ) :
+                   where->current->getChildSetReference( plane )))) {
+                       where->iter = OSCollectionIterator::withCollection( links );
+               }
+       } else
        // next sibling - release current
        // next sibling - release current
-        if( where->current)
-            where->current->release();
-
-    if( where->iter) {
+       if (where->current) {
+               where->current->release();
+       }
 
 
-        next = (IORegistryEntry *) where->iter->getNextObject();
+       if (where->iter) {
+               next = (IORegistryEntry *) where->iter->getNextObject();
 
 
-        if( next)
-            next->retain();
-        else if( !where->iter->isValid())
-            options |= kIORegistryIteratorInvalidFlag;
-    }
+               if (next) {
+                       next->retain();
+               } else if (!where->iter->isValid()) {
+                       options |= kIORegistryIteratorInvalidFlag;
+               }
+       }
 
 
-    where->current = next;
+       where->current = next;
 
 
-    UNLOCK;
+       UNLOCK;
 
 
-    return( next);
+       return next;
 }
 
 }
 
-IORegistryEntry * IORegistryIterator::getNextObjectRecursive( void )
+IORegistryEntry *
+IORegistryIterator::getNextObjectRecursive( void )
 {
 {
-    IORegistryEntry *  next;
+       IORegistryEntry *   next;
 
 
-    do
-        next = getNextObjectFlat();
-    while( (0 == next) && exitEntry());
+       do{
+               next = getNextObjectFlat();
+       } while ((NULL == next) && exitEntry());
 
 
-    if( next) {
-       if( 0 == done)
-            done = OSOrderedSet::withCapacity( 10 );
-       if( done->setObject((OSObject *) next)) {
-                   // done set didn't contain this one, so recurse
-            enterEntry();
+       if (next) {
+               if (NULL == done) {
+                       done = OSOrderedSet::withCapacity( 10 );
+               }
+               if (done->setObject((OSObject *) next)) {
+                       // done set didn't contain this one, so recurse
+                       enterEntry();
+               }
        }
        }
-    }
-    return( next);
+       return next;
 }
 
 }
 
-IORegistryEntry * IORegistryIterator::getNextObject( void )
+IORegistryEntry *
+IORegistryIterator::getNextObject( void )
 {
 {
-    if( options & kIORegistryIterateRecursively)
-       return( getNextObjectRecursive());
-    else
-       return( getNextObjectFlat());
+       if (options & kIORegistryIterateRecursively) {
+               return getNextObjectRecursive();
+       } else {
+               return getNextObjectFlat();
+       }
 }
 
 }
 
-IORegistryEntry * IORegistryIterator::getCurrentEntry( void )
+IORegistryEntry *
+IORegistryIterator::getCurrentEntry( void )
 {
 {
-    if( isValid())
-       return( where->current);
-    else
-       return( 0);
+       if (isValid()) {
+               return where->current;
+       } else {
+               return NULL;
+       }
 }
 
 }
 
-OSOrderedSet * IORegistryIterator::iterateAll( void )
+OSOrderedSet *
+IORegistryIterator::iterateAll( void )
 {
 {
-    reset();
-    while( getNextObjectRecursive())
-        {}
-    if( done)
-        done->retain();
-    return( done);
+       reset();
+       while (getNextObjectRecursive()) {
+       }
+       if (done) {
+               done->retain();
+       }
+       return done;
 }
 
 }
 
+#if __LP64__
+OSMetaClassDefineReservedUnused(IORegistryEntry, 0);
+OSMetaClassDefineReservedUnused(IORegistryEntry, 1);
+OSMetaClassDefineReservedUnused(IORegistryEntry, 2);
+OSMetaClassDefineReservedUnused(IORegistryEntry, 3);
+OSMetaClassDefineReservedUnused(IORegistryEntry, 4);
+OSMetaClassDefineReservedUnused(IORegistryEntry, 5);
+#else
 OSMetaClassDefineReservedUsed(IORegistryEntry, 0);
 OSMetaClassDefineReservedUsed(IORegistryEntry, 1);
 OSMetaClassDefineReservedUsed(IORegistryEntry, 2);
 OSMetaClassDefineReservedUsed(IORegistryEntry, 3);
 OSMetaClassDefineReservedUsed(IORegistryEntry, 4);
 OSMetaClassDefineReservedUsed(IORegistryEntry, 0);
 OSMetaClassDefineReservedUsed(IORegistryEntry, 1);
 OSMetaClassDefineReservedUsed(IORegistryEntry, 2);
 OSMetaClassDefineReservedUsed(IORegistryEntry, 3);
 OSMetaClassDefineReservedUsed(IORegistryEntry, 4);
-
-OSMetaClassDefineReservedUnused(IORegistryEntry, 5);
+OSMetaClassDefineReservedUsed(IORegistryEntry, 5);
+#endif
 OSMetaClassDefineReservedUnused(IORegistryEntry, 6);
 OSMetaClassDefineReservedUnused(IORegistryEntry, 7);
 OSMetaClassDefineReservedUnused(IORegistryEntry, 8);
 OSMetaClassDefineReservedUnused(IORegistryEntry, 6);
 OSMetaClassDefineReservedUnused(IORegistryEntry, 7);
 OSMetaClassDefineReservedUnused(IORegistryEntry, 8);
@@ -2105,5 +2430,8 @@ OSMetaClassDefineReservedUnused(IORegistryEntry, 30);
 OSMetaClassDefineReservedUnused(IORegistryEntry, 31);
 
 /* inline function implementation */
 OSMetaClassDefineReservedUnused(IORegistryEntry, 31);
 
 /* inline function implementation */
-OSDictionary * IORegistryEntry::getPropertyTable( void ) const
-{ return(fPropertyTable); }
+OSDictionary *
+IORegistryEntry::getPropertyTable( void ) const
+{
+       return fPropertyTable;
+}
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