/*
- * Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 1998-2006 Apple Computer, Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
+ * @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. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
+ * 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
* Please see the License for the specific language governing rights and
* limitations under the License.
*
- * @APPLE_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/*
* Copyright (c) 1998 Apple Computer, Inc. All rights reserved.
#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
static IORegistryEntry * gRegistryRoot;
static OSDictionary * gIORegistryPlanes;
const OSSymbol * gIONameKey;
const OSSymbol * gIOLocationKey;
+const OSSymbol * gIORegistryEntryIDKey;
enum {
kParentSetIndex = 0,
kIOMaxPlaneName = 32
};
+enum { kIORegistryIDReserved = (1ULL << 32) + 255 };
+
+static uint64_t gIORegistryLastID = kIORegistryIDReserved;
+
class IORegistryPlane : public OSObject {
friend class IORegistryEntry;
int reserved[2];
public:
- virtual bool serialize(OSSerialize *s) const;
+ virtual bool serialize(OSSerialize *s) const APPLE_KEXT_OVERRIDE;
};
OSDefineMetaClassAndStructors(IORegistryPlane, OSObject)
static IORecursiveLock * gPropertiesLock;
static SInt32 gIORegistryGenerationCount;
-#define UNLOCK s_lock_done( &gIORegistryLock )
-#define RLOCK s_lock_read( &gIORegistryLock )
-#define WLOCK s_lock_write( &gIORegistryLock ); \
+#define UNLOCK lck_rw_done( &gIORegistryLock )
+#define RLOCK lck_rw_lock_shared( &gIORegistryLock )
+#define WLOCK lck_rw_lock_exclusive( &gIORegistryLock ); \
gIORegistryGenerationCount++
// make atomic
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-struct s_lock_t {
- lck_spin_t 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? */
-};
-
-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));
-
- lck_spin_init(&l->interlock, IOLockGroup, LCK_ATTR_NULL);
- 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)
-{
- register int i;
+lck_rw_t gIORegistryLock;
+lck_grp_t *gIORegistryLockGrp;
+lck_grp_attr_t *gIORegistryLockGrpAttr;
+lck_attr_t *gIORegistryLockAttr;
- lck_spin_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) {
- lck_spin_unlock(&l->interlock);
- while (--i != 0 && l->want_write)
- continue;
- lck_spin_lock(&l->interlock);
- }
-
- if (l->can_sleep && l->want_write) {
- l->waiting = TRUE;
- lck_spin_sleep( &l->interlock, LCK_SLEEP_DEFAULT,
- (event_t) l, THREAD_UNINT);
- /* interlock relocked */
- }
- }
- l->want_write = TRUE;
-
- /* Wait for readers (and upgrades) to finish */
-
- while ((l->read_count != 0) || l->want_upgrade) {
-
- i = lock_wait_time[l->can_sleep ? 1 : 0];
- if (i != 0) {
- lck_spin_unlock(&l->interlock);
- while (--i != 0 && (l->read_count != 0 ||
- l->want_upgrade))
- continue;
- lck_spin_lock(&l->interlock);
- }
-
- if (l->can_sleep && (l->read_count != 0 || l->want_upgrade)) {
- l->waiting = TRUE;
- lck_spin_sleep( &l->interlock, LCK_SLEEP_DEFAULT,
- (event_t) l, THREAD_UNINT);
- /* interlock relocked */
- }
- }
-
- lck_spin_unlock(&l->interlock);
-}
-
-static void
-s_lock_done(
- register s_lock_t * l)
-{
- boolean_t do_wakeup = FALSE;
-
- lck_spin_lock(&l->interlock);
-
- if (l->read_count != 0) {
- l->read_count -= 1;
- }
- else {
- if (l->want_upgrade) {
- l->want_upgrade = FALSE;
- }
- 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;
- }
-
- lck_spin_unlock(&l->interlock);
-
- if (do_wakeup)
- thread_wakeup((event_t) l);
-}
-
-static void
-s_lock_read(
- register s_lock_t * l)
-{
- register int i;
-
- lck_spin_lock(&l->interlock);
-
- while ( l->want_upgrade || ((0 == l->read_count) && l->want_write )) {
-
- i = lock_wait_time[l->can_sleep ? 1 : 0];
-
- if (i != 0) {
- lck_spin_unlock(&l->interlock);
- while (--i != 0 &&
- (l->want_upgrade || ((0 == l->read_count) && l->want_write )))
- continue;
- lck_spin_lock(&l->interlock);
- }
-
- if (l->can_sleep &&
- (l->want_upgrade || ((0 == l->read_count) && l->want_write ))) {
- l->waiting = TRUE;
- lck_spin_sleep( &l->interlock, LCK_SLEEP_DEFAULT,
- (event_t) l, THREAD_UNINT);
- /* interlock relocked */
- }
- }
-
- l->read_count += 1;
- lck_spin_unlock(&l->interlock);
-
-}
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
if( !gRegistryRoot) {
- s_lock_init( &gIORegistryLock, true );
+
+ gIORegistryLockGrpAttr = lck_grp_attr_alloc_init();
+ //lck_grp_attr_setstat(gIORegistryLockGrpAttr);
+ gIORegistryLockGrp = lck_grp_alloc_init("IORegistryLock", gIORegistryLockGrpAttr);
+ gIORegistryLockAttr = lck_attr_alloc_init();
+ lck_attr_rw_shared_priority(gIORegistryLockAttr);
+ //lck_attr_setdebug(gIORegistryLockAttr);
+ lck_rw_init( &gIORegistryLock, gIORegistryLockGrp, gIORegistryLockAttr);
+
gRegistryRoot = new IORegistryEntry;
gPropertiesLock = IORecursiveLockAlloc();
gIORegistryPlanes = OSDictionary::withCapacity( 1 );
&& gIORegistryPlanes );
ok = gRegistryRoot->init();
+ if (ok)
+ gRegistryRoot->reserved->fRegistryEntryID = ++gIORegistryLastID;
+
gIONameKey = OSSymbol::withCStringNoCopy( "IOName" );
gIOLocationKey = OSSymbol::withCStringNoCopy( "IOLocation" );
+ gIORegistryEntryIDKey = OSSymbol::withCStringNoCopy( kIORegistryEntryIDKey );
assert( ok && gIONameKey && gIOLocationKey );
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);
- strcpy( end, kIORegPlaneParentSuffix );
+ strlcpy( end, kIORegPlaneParentSuffix, kIORegPlaneParentSuffixLen + 1 );
parentKey = OSSymbol::withCString( key);
- strcpy( end, kIORegPlaneChildSuffix );
+ strlcpy( end, kIORegPlaneChildSuffix, kIORegPlaneChildSuffixLen + 1 );
childKey = OSSymbol::withCString( key);
- strcpy( end, kIORegPlaneNameSuffix );
+ strlcpy( end, kIORegPlaneNameSuffix, kIORegPlaneNameSuffixLen + 1 );
pathNameKey = OSSymbol::withCString( key);
- strcpy( end, kIORegPlaneLocationSuffix );
+ strlcpy( end, kIORegPlaneLocationSuffix, kIORegPlaneLocationSuffixLen + 1 );
pathLocationKey = OSSymbol::withCString( key);
plane = new IORegistryPlane;
if( !super::init())
return( false);
+ if (!reserved)
+ {
+ reserved = IONew(ExpansionData, 1);
+ if (!reserved)
+ return (false);
+ bzero(reserved, sizeof(ExpansionData));
+ }
if( dict) {
- dict->retain();
+ if (OSCollection::kImmutable & dict->setOptions(0, 0)) {
+ dict = (OSDictionary *) dict->copyCollection();
+ if (!dict)
+ return (false);
+ } else
+ dict->retain();
if( fPropertyTable)
fPropertyTable->release();
fPropertyTable = dict;
WLOCK;
+ reserved = old->reserved;
+ old->reserved = NULL;
+
fPropertyTable = old->getPropertyTable();
fPropertyTable->retain();
#ifdef IOREGSPLITTABLES
fRegistryTable = old->fRegistryTable;
- old->fRegistryTable = OSDictionary::withDictionary( fRegistryTable );
+ old->fRegistryTable = (OSDictionary *) fRegistryTable->copyCollection();
#endif /* IOREGSPLITTABLES */
old->registryTable()->removeObject( plane->keys[ kParentSetIndex ] );
void IORegistryEntry::free( void )
{
-
#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 );
+ panic("%s: attached at free()", getName());
}
}
#endif
registryTable()->release();
#endif /* IOREGSPLITTABLES */
+ if (reserved)
+ IODelete(reserved, ExpansionData, 1);
+
super::free();
}
PUNLOCK;
}
+#if KASLR_IOREG_DEBUG
+extern "C" {
+
+bool ScanForAddrInObject(OSObject * theObject,
+ int indent);
+
+}; /* extern "C" */
+#endif
+
bool
IORegistryEntry::setProperty( const OSSymbol * aKey, OSObject * anObject)
{
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;
}
OSArray * stack;
IORegistryEntry * root;
const IORegistryEntry * entry;
- IORegistryEntry * parent;
+ const IORegistryEntry * parent;
const OSSymbol * alias;
int index;
- int len, maxLength, compLen;
+ int len, maxLength, compLen, aliasLen;
char * nextComp;
bool ok;
len = plane->nameKey->getLength();
if( len >= maxLength)
return( false);
- strcpy( nextComp, plane->nameKey->getCStringNoCopy());
+ strlcpy( nextComp, plane->nameKey->getCStringNoCopy(), len + 1);
nextComp[ len++ ] = ':';
nextComp += len;
if( (alias = hasAlias( plane ))) {
- len += alias->getLength();
+ aliasLen = alias->getLength();
+ len += aliasLen;
ok = (maxLength > len);
*length = len;
if( ok)
- strcpy( nextComp, alias->getCStringNoCopy());
+ strlcpy( nextComp, alias->getCStringNoCopy(), aliasLen + 1);
return( ok );
}
- entry = this;
- parent = entry->getParentEntry( plane );
- if( !parent)
- // Error if not attached in plane
- return( false);
-
stack = OSArray::withCapacity( getDepth( plane ));
- if( !stack)
- return( false);
+ if (!stack) return( false);
RLOCK;
+ parent = entry = this;
root = gRegistryRoot->getChildEntry( plane );
- while( parent && (entry != root)) {
+ while (parent && (parent != root))
+ {
// stop below root
- stack->setObject( (OSObject *) entry );
entry = parent;
parent = entry->getParentEntry( plane );
+ stack->setObject( (OSObject *) entry );
}
- index = stack->getCount();
- ok = true;
-
- if( 0 == index) {
+ ok = (0 != parent);
+ if (ok)
+ {
+ index = stack->getCount();
+ if( 0 == index) {
- *nextComp++ = '/';
- *nextComp = 0;
- len++;
+ *nextComp++ = '/';
+ *nextComp = 0;
+ len++;
- } else while( ok && ((--index) >= 0)) {
+ } else while( ok && ((--index) >= 0)) {
- entry = (IORegistryEntry *) stack->getObject((unsigned int) index );
- assert( entry );
+ entry = (IORegistryEntry *) stack->getObject((unsigned int) index );
+ assert( entry );
- if( (alias = entry->hasAlias( plane ))) {
- len = plane->nameKey->getLength() + 1;
- nextComp = path + len;
+ 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 );
+ 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 && compLen) {
+ compLen++;
+ *nextComp = '/';
+ }
}
- }
- if( ok) {
- len += compLen;
- nextComp += compLen;
+ if( ok) {
+ len += compLen;
+ nextComp += compLen;
+ }
}
+ *length = len;
}
- *length = len;
-
UNLOCK;
-
stack->release();
return( ok );
else
locLen = 0;
- ok = ((len + locLen) < maxLength);
+ ok = ((len + locLen + 1) < maxLength);
if( ok) {
- strcpy( path, compName );
+ strlcpy( path, compName, len + 1 );
if( loc) {
path += len;
len += locLen;
*path++ = '@';
- strcpy( path, loc );
+ strlcpy( path, loc, locLen );
}
*length = len;
}
{}
end--;
if( (end - path) < kIOMaxPlaneName) {
- strncpy( temp, path, end - path );
- temp[ end - path ] = 0;
+ strlcpy( temp, path, end - path + 1 );
RLOCK;
entry = IORegistryEntry::fromPath( "/aliases", plane );
// get plane name
end = strchr( path, ':' );
if( end && ((end - path) < kIOMaxPlaneName)) {
- strncpy( temp, path, end - path );
- temp[ end - path ] = 0;
+ strlcpy( temp, path, end - path + 1 );
plane = getPlane( temp );
path = end + 1;
}
if( opath && length) {
// copy out residual path
- len2 = len + strlen( path );
- if( len2 < *length)
- strcpy( opath + len, path );
- *length = len2;
+ 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
const OSSymbol *key;
while( (key = (OSSymbol *) iter->getNextObject()) ) {
- const char *keysuffix;
+ size_t keysuffix;
// Get a pointer to this keys suffix
- keysuffix = key->getCStringNoCopy()
- + key->getLength() - kIORegPlaneParentSuffixLen;
- if( !strcmp(keysuffix, kIORegPlaneParentSuffix) ) {
+ keysuffix = key->getLength();
+ if (keysuffix <= kIORegPlaneParentSuffixLen)
+ continue;
+ keysuffix -= kIORegPlaneParentSuffixLen;
+ if( !strncmp(key->getCStringNoCopy() + keysuffix,
+ kIORegPlaneParentSuffix,
+ kIORegPlaneParentSuffixLen + 1) ) {
ret = true;
break;
}
WLOCK;
+ if (!reserved->fRegistryEntryID)
+ reserved->fRegistryEntryID = ++gIORegistryLastID;
+
ret = makeLink( parent, kParentSetIndex, plane );
if( (links = parent->getChildSetReference( plane )))
return( ret );
}
+uint64_t IORegistryEntry::getRegistryEntryID( void )
+{
+ if (reserved)
+ return (reserved->fRegistryEntryID);
+ else
+ return (0);
+}
+
bool IORegistryEntry::attachToChild( IORegistryEntry * child,
const IORegistryPlane * plane )
{
IORegistryEntry * parent;
retain();
- while( (parent = getParentEntry( plane )))
+ while( (parent = copyParentEntry( plane )))
+ {
detachFromParent( parent, plane );
+ parent->release();
+ }
release();
}
IORegCursor * prev;
prev = where;
- where = (IORegCursor *) IOMalloc( sizeof( IORegCursor));
+ where = (IORegCursor *) IOMalloc( sizeof(IORegCursor));
assert( where);
if( where) {
if( where != &start) {
gone = where;
where = gone->next;
- IOFree( gone, sizeof( IORegCursor));
+ IOFree( gone, sizeof(IORegCursor));
return( true);
} else
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, 5);
-
+#endif
OSMetaClassDefineReservedUnused(IORegistryEntry, 6);
OSMetaClassDefineReservedUnused(IORegistryEntry, 7);
OSMetaClassDefineReservedUnused(IORegistryEntry, 8);
projects / apple / xnu.git / blobdiff