/*
- * Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 1998-2012 Apple Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_OSREFERENCE_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 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.
*
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * 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,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
+ * 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_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/*
- * Copyright (c) 1998 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 1998 Apple Inc. All rights reserved.
*
* HISTORY
*
*/
+/*
+ * NOTICE: This file was modified by SPARTA, Inc. in 2005 to introduce
+ * support for mandatory and extensible security protections. This notice
+ * is included in support of clause 2.2 (b) of the Apple Public License,
+ * Version 2.0.
+ */
-#include <IOKit/IODeviceTreeSupport.h>
-#include <IOKit/IOService.h>
-#include <libkern/c++/OSContainers.h>
-#include <IOKit/IOCatalogue.h>
-#include <libkern/c++/OSUnserialize.h>
extern "C" {
#include <machine/machine_routines.h>
-#include <mach/kmod.h>
-#include <mach-o/mach_header.h>
+#include <libkern/kernel_mach_header.h>
#include <kern/host.h>
+#include <security/mac_data.h>
};
-#include <IOKit/IOLib.h>
-
-#include <IOKit/assert.h>
-
-
-extern "C" {
-int IODTGetLoaderInfo( char *key, void **infoAddr, int *infoSize );
-extern void IODTFreeLoaderInfo( char *key, void *infoAddr, int infoSize );
-extern void OSRuntimeUnloadCPPForSegment(
- struct segment_command * segment);
-};
-
-
-/*****
- * At startup these function pointers are set to use the libsa in-kernel
- * linker for recording and loading kmods. Once the root filesystem
- * is available, the kmod_load_function pointer gets switched to point
- * at the kmod_load_extension() function built into the kernel, and the
- * others are set to zero. Those two functions must *always* be checked
- * before being invoked.
- */
-extern "C" {
-kern_return_t (*kmod_load_function)(char *extension_name) =
- &kmod_load_extension;
-bool (*record_startup_extensions_function)(void) = 0;
-bool (*add_from_mkext_function)(OSData * mkext) = 0;
-void (*remove_startup_extension_function)(const char * name) = 0;
-};
-
-
-/*****
- * A few parts of IOCatalogue require knowledge of
- * whether the in-kernel linker is present. This
- * variable is set by libsa's bootstrap code.
- */
-int kernelLinkerPresent = 0;
+#include <libkern/c++/OSContainers.h>
+#include <libkern/c++/OSUnserialize.h>
+#include <libkern/c++/OSKext.h>
+#include <libkern/OSKextLibPrivate.h>
+#include <libkern/OSDebug.h>
-#define kModuleKey "CFBundleIdentifier"
+#include <IOKit/IODeviceTreeSupport.h>
+#include <IOKit/IOService.h>
+#include <IOKit/IOCatalogue.h>
-#define super OSObject
-OSDefineMetaClassAndStructors(IOCatalogue, OSObject)
+#include <IOKit/IOLib.h>
+#include <IOKit/assert.h>
-#define CATALOGTEST 0
+#if PRAGMA_MARK
+#pragma mark Internal Declarations
+#endif
+/*********************************************************************
+*********************************************************************/
IOCatalogue * gIOCatalogue;
const OSSymbol * gIOClassKey;
const OSSymbol * gIOProbeScoreKey;
const OSSymbol * gIOModuleIdentifierKey;
-OSSet * gIOCatalogModuleRequests;
-OSSet * gIOCatalogCacheMisses;
-OSSet * gIOCatalogROMMkexts;
-IOLock * gIOCatalogLock;
-IOLock * gIOKLDLock;
-
-/*********************************************************************
-*********************************************************************/
-
-OSArray * gIOPrelinkedModules = 0;
-
-extern "C" kern_return_t
-kmod_create_internal(
- kmod_info_t *info,
- kmod_t *id);
-
-extern "C" kern_return_t
-kmod_destroy_internal(kmod_t id);
-
-extern "C" kern_return_t
-kmod_start_or_stop(
- kmod_t id,
- int start,
- kmod_args_t *data,
- mach_msg_type_number_t *dataCount);
-
-extern "C" kern_return_t kmod_retain(kmod_t id);
-extern "C" kern_return_t kmod_release(kmod_t id);
-
-static
-kern_return_t start_prelink_module(UInt32 moduleIndex)
-{
- kern_return_t kr = KERN_SUCCESS;
- UInt32 * togo;
- SInt32 count, where, end;
- UInt32 * prelink;
- SInt32 next, lastDep;
- OSData * data;
- OSString * str;
- OSDictionary * dict;
-
- OSArray *
- prelinkedModules = gIOPrelinkedModules;
-
- togo = IONew(UInt32, prelinkedModules->getCount());
- togo[0] = moduleIndex;
- count = 1;
-
- for (next = 0; next < count; next++)
- {
- dict = (OSDictionary *) prelinkedModules->getObject(togo[next]);
-
- data = OSDynamicCast(OSData, dict->getObject("OSBundlePrelink"));
- if (!data)
- {
- // already started or no code
- if (togo[next] == moduleIndex)
- {
- kr = KERN_FAILURE;
- break;
- }
- continue;
- }
- prelink = (UInt32 *) data->getBytesNoCopy();
- lastDep = OSReadBigInt32(prelink, 12);
- for (SInt32 idx = OSReadBigInt32(prelink, 8); idx < lastDep; idx += sizeof(UInt32))
- {
- UInt32 depIdx = OSReadBigInt32(prelink, idx) - 1;
-
- for (where = next + 1;
- (where < count) && (togo[where] > depIdx);
- where++) {}
-
- if (where != count)
- {
- if (togo[where] == depIdx)
- continue;
- for (end = count; end != where; end--)
- togo[end] = togo[end - 1];
- }
- count++;
- togo[where] = depIdx;
- }
- }
-
- if (KERN_SUCCESS != kr)
- return kr;
-
- for (next = (count - 1); next >= 0; next--)
- {
- dict = (OSDictionary *) prelinkedModules->getObject(togo[next]);
-
- data = OSDynamicCast(OSData, dict->getObject("OSBundlePrelink"));
- if (!data)
- continue;
- prelink = (UInt32 *) data->getBytesNoCopy();
-
- kmod_t id;
- kmod_info_t * kmod_info = (kmod_info_t *) OSReadBigInt32(prelink, 0);
-
- kr = kmod_create_internal(kmod_info, &id);
- if (KERN_SUCCESS != kr)
- break;
-
- lastDep = OSReadBigInt32(prelink, 12);
- for (SInt32 idx = OSReadBigInt32(prelink, 8); idx < lastDep; idx += sizeof(UInt32))
- {
- OSDictionary * depDict;
- kmod_info_t * depInfo;
-
- depDict = (OSDictionary *) prelinkedModules->getObject(OSReadBigInt32(prelink, idx) - 1);
- str = OSDynamicCast(OSString, depDict->getObject(kModuleKey));
- depInfo = kmod_lookupbyname_locked(str->getCStringNoCopy());
- if (depInfo)
- {
- kr = kmod_retain(KMOD_PACK_IDS(id, depInfo->id));
- kfree((vm_offset_t) depInfo, sizeof(kmod_info_t));
- } else
- IOLog("%s: NO DEP %s\n", kmod_info->name, str->getCStringNoCopy());
- }
- dict->removeObject("OSBundlePrelink");
-
- if (kmod_info->start)
- kr = kmod_start_or_stop(kmod_info->id, 1, 0, 0);
- }
+IORWLock * gIOCatalogLock;
- IODelete(togo, UInt32, prelinkedModules->getCount());
-
- return kr;
-}
+#if PRAGMA_MARK
+#pragma mark Utility functions
+#endif
+#if PRAGMA_MARK
+#pragma mark IOCatalogue class implementation
+#endif
/*********************************************************************
-* This is a function that IOCatalogue calls in order to load a kmod.
*********************************************************************/
-static
-kern_return_t kmod_load_from_cache_sym(const OSSymbol * kmod_name)
-{
- OSArray * prelinkedModules = gIOPrelinkedModules;
- kern_return_t result = KERN_FAILURE;
- OSDictionary * dict;
- OSObject * ident;
- UInt32 idx;
-
- if (!gIOPrelinkedModules)
- return KERN_FAILURE;
-
- for (idx = 0;
- (dict = (OSDictionary *) prelinkedModules->getObject(idx));
- idx++)
- {
- if ((ident = dict->getObject(kModuleKey))
- && kmod_name->isEqualTo(ident))
- break;
- }
- if (dict)
- {
- if (kernelLinkerPresent && dict->getObject("OSBundleDefer"))
- {
- kmod_load_extension((char *) kmod_name->getCStringNoCopy());
- result = kIOReturnOffline;
- }
- else
- result = start_prelink_module(idx);
- }
-
- return result;
-}
-
-extern "C" Boolean kmod_load_request(const char * moduleName, Boolean make_request)
-{
- bool ret, cacheMiss = false;
- kern_return_t kr;
- const OSSymbol * sym = 0;
- kmod_info_t * kmod_info;
-
- if (!moduleName)
- return false;
-
- /* To make sure this operation completes even if a bad extension needs
- * to be removed, take the kld lock for this whole block, spanning the
- * kmod_load_function() and remove_startup_extension_function() calls.
- */
- IOLockLock(gIOKLDLock);
- do
- {
- // Is the module already loaded?
- ret = (0 != (kmod_info = kmod_lookupbyname_locked((char *)moduleName)));
- if (ret) {
- kfree((vm_offset_t) kmod_info, sizeof(kmod_info_t));
- break;
- }
- sym = OSSymbol::withCString(moduleName);
- if (!sym) {
- ret = false;
- break;
- }
-
- kr = kmod_load_from_cache_sym(sym);
- ret = (kIOReturnSuccess == kr);
- cacheMiss = !ret;
- if (ret || !make_request || (kr == kIOReturnOffline))
- break;
-
- // If the module hasn't been loaded, then load it.
- if (!kmod_load_function) {
- IOLog("IOCatalogue: %s cannot be loaded "
- "(kmod load function not set).\n",
- moduleName);
- break;
- }
-
- kr = kmod_load_function((char *)moduleName);
-
- if (ret != kIOReturnSuccess) {
- IOLog("IOCatalogue: %s cannot be loaded.\n", moduleName);
-
- /* If the extension couldn't be loaded this time,
- * make it unavailable so that no more requests are
- * made in vain. This also enables other matching
- * extensions to have a chance.
- */
- if (kernelLinkerPresent && remove_startup_extension_function) {
- (*remove_startup_extension_function)(moduleName);
- }
- ret = false;
-
- } else if (kernelLinkerPresent) {
- // If kern linker is here, the driver is actually loaded,
- // so return true.
- ret = true;
-
- } else {
- // kern linker isn't here, a request has been queued
- // but the module isn't necessarily loaded yet, so stall.
- ret = false;
- }
- }
- while (false);
-
- IOLockUnlock(gIOKLDLock);
-
- if (sym)
- {
- IOLockLock(gIOCatalogLock);
- gIOCatalogModuleRequests->setObject(sym);
- if (cacheMiss)
- gIOCatalogCacheMisses->setObject(sym);
- IOLockUnlock(gIOCatalogLock);
- }
-
- return ret;
-}
-
-extern "C" kern_return_t kmod_unload_cache(void)
-{
- OSArray * prelinkedModules = gIOPrelinkedModules;
- kern_return_t result = KERN_FAILURE;
- OSDictionary * dict;
- UInt32 idx;
- UInt32 * prelink;
- OSData * data;
-
- if (!gIOPrelinkedModules)
- return KERN_SUCCESS;
-
- IOLockLock(gIOKLDLock);
- for (idx = 0;
- (dict = (OSDictionary *) prelinkedModules->getObject(idx));
- idx++)
- {
- data = OSDynamicCast(OSData, dict->getObject("OSBundlePrelink"));
- if (!data)
- continue;
- prelink = (UInt32 *) data->getBytesNoCopy();
-
- kmod_info_t * kmod_info = (kmod_info_t *) OSReadBigInt32(prelink, 0);
- vm_offset_t
- virt = ml_static_ptovirt(kmod_info->address);
- if( virt) {
- ml_static_mfree(virt, kmod_info->size);
- }
- }
-
- gIOPrelinkedModules->release();
- gIOPrelinkedModules = 0;
-
- IOLockUnlock(gIOKLDLock);
-
- return result;
-}
-
-extern "C" kern_return_t kmod_load_from_cache(const char * kmod_name)
-{
- kern_return_t kr;
- const OSSymbol * sym = OSSymbol::withCStringNoCopy(kmod_name);
+#define super OSObject
+OSDefineMetaClassAndStructors(IOCatalogue, OSObject)
- if (sym)
- {
- kr = kmod_load_from_cache_sym(sym);
- sym->release();
- }
- else
- kr = kIOReturnNoMemory;
+static bool isModuleLoadedNoOSKextLock(OSDictionary *theKexts,
+ OSDictionary *theModuleDict);
- return kr;
-}
/*********************************************************************
*********************************************************************/
-
-static void UniqueProperties( OSDictionary * dict )
-{
- OSString * data;
-
- data = OSDynamicCast( OSString, dict->getObject( gIOClassKey ));
- if( data) {
- const OSSymbol *classSymbol = OSSymbol::withString(data);
-
- dict->setObject( gIOClassKey, (OSSymbol *) classSymbol);
- classSymbol->release();
- }
-
- data = OSDynamicCast( OSString, dict->getObject( gIOMatchCategoryKey ));
- if( data) {
- const OSSymbol *classSymbol = OSSymbol::withString(data);
-
- dict->setObject( gIOMatchCategoryKey, (OSSymbol *) classSymbol);
- classSymbol->release();
- }
-}
-
-void IOCatalogue::initialize( void )
+void IOCatalogue::initialize(void)
{
OSArray * array;
OSString * errorString;
array = OSDynamicCast(OSArray, OSUnserialize(gIOKernelConfigTables, &errorString));
if (!array && errorString) {
- IOLog("KernelConfigTables syntax error: %s\n",
- errorString->getCStringNoCopy());
- errorString->release();
+ IOLog("KernelConfigTables syntax error: %s\n",
+ errorString->getCStringNoCopy());
+ errorString->release();
}
gIOClassKey = OSSymbol::withCStringNoCopy( kIOClassKey );
gIOProbeScoreKey = OSSymbol::withCStringNoCopy( kIOProbeScoreKey );
- gIOModuleIdentifierKey = OSSymbol::withCStringNoCopy( kModuleKey );
- gIOCatalogModuleRequests = OSSet::withCapacity(16);
- gIOCatalogCacheMisses = OSSet::withCapacity(16);
- gIOCatalogROMMkexts = OSSet::withCapacity(4);
+ gIOModuleIdentifierKey = OSSymbol::withCStringNoCopy( kCFBundleIdentifierKey );
assert( array && gIOClassKey && gIOProbeScoreKey
- && gIOModuleIdentifierKey && gIOCatalogModuleRequests);
+ && gIOModuleIdentifierKey);
gIOCatalogue = new IOCatalogue;
assert(gIOCatalogue);
array->release();
}
-// Initialize the IOCatalog object.
+/*********************************************************************
+* Initialize the IOCatalog object.
+*********************************************************************/
+OSArray * IOCatalogue::arrayForPersonality(OSDictionary * dict)
+{
+ const OSSymbol * sym;
+
+ sym = OSDynamicCast(OSSymbol, dict->getObject(gIOProviderClassKey));
+ if (!sym) return (0);
+
+ return ((OSArray *) personalities->getObject(sym));
+}
+
+void IOCatalogue::addPersonality(OSDictionary * dict)
+{
+ const OSSymbol * sym;
+ OSArray * arr;
+
+ sym = OSDynamicCast(OSSymbol, dict->getObject(gIOProviderClassKey));
+ if (!sym) return;
+ arr = (OSArray *) personalities->getObject(sym);
+ if (arr) arr->setObject(dict);
+ else
+ {
+ arr = OSArray::withObjects((const OSObject **)&dict, 1, 2);
+ personalities->setObject(sym, arr);
+ arr->release();
+ }
+}
+
+/*********************************************************************
+* Initialize the IOCatalog object.
+*********************************************************************/
bool IOCatalogue::init(OSArray * initArray)
{
- IORegistryEntry * entry;
OSDictionary * dict;
-
+ OSObject * obj;
+
if ( !super::init() )
return false;
generation = 1;
- array = initArray;
- array->retain();
- kernelTables = OSCollectionIterator::withCollection( array );
-
- gIOCatalogLock = IOLockAlloc();
- gIOKLDLock = IOLockAlloc();
-
- lock = gIOCatalogLock;
- kld_lock = gIOKLDLock;
-
- kernelTables->reset();
- while( (dict = (OSDictionary *) kernelTables->getNextObject())) {
- UniqueProperties(dict);
+ personalities = OSDictionary::withCapacity(32);
+ personalities->setOptions(OSCollection::kSort, OSCollection::kSort);
+ for (unsigned int idx = 0; (obj = initArray->getObject(idx)); idx++)
+ {
+ dict = OSDynamicCast(OSDictionary, obj);
+ if (!dict) continue;
+ OSKext::uniquePersonalityProperties(dict);
if( 0 == dict->getObject( gIOClassKey ))
+ {
IOLog("Missing or bad \"%s\" key\n",
gIOClassKey->getCStringNoCopy());
+ continue;
+ }
+ dict->setObject("KernelConfigTable", kOSBooleanTrue);
+ addPersonality(dict);
}
-#if CATALOGTEST
- AbsoluteTime deadline;
- clock_interval_to_deadline( 1000, kMillisecondScale );
- thread_call_func_delayed( ping, this, deadline );
-#endif
-
- entry = IORegistryEntry::getRegistryRoot();
- if ( entry )
- entry->setProperty(kIOCatalogueKey, this);
+ gIOCatalogLock = IORWLockAlloc();
+ lock = gIOCatalogLock;
return true;
}
-// Release all resources used by IOCatalogue and deallocate.
-// This will probably never be called.
+/*********************************************************************
+* Release all resources used by IOCatalogue and deallocate.
+* This will probably never be called.
+*********************************************************************/
void IOCatalogue::free( void )
{
- if ( array )
- array->release();
-
- if ( kernelTables )
- kernelTables->release();
-
- super::free();
-}
-
-#if CATALOGTEST
-
-static int hackLimit;
-
-enum { kDriversPerIter = 4 };
-
-void IOCatalogue::ping( thread_call_param_t arg, thread_call_param_t)
-{
- IOCatalogue * self = (IOCatalogue *) arg;
- OSOrderedSet * set;
- OSDictionary * table;
- int newLimit;
-
- set = OSOrderedSet::withCapacity( 1 );
-
- IOLockLock( &self->lock );
-
- for( newLimit = 0; newLimit < kDriversPerIter; newLimit++) {
- table = (OSDictionary *) self->array->getObject(
- hackLimit + newLimit );
- if( table) {
- set->setLastObject( table );
-
- OSSymbol * sym = (OSSymbol *) table->getObject( gIOClassKey );
- kprintf("enabling %s\n", sym->getCStringNoCopy());
-
- } else {
- newLimit--;
- break;
- }
- }
-
- IOService::catalogNewDrivers( set );
-
- hackLimit += newLimit;
- self->generation++;
-
- IOLockUnlock( &self->lock );
-
- if( kDriversPerIter == newLimit) {
- AbsoluteTime deadline;
- clock_interval_to_deadline( 500, kMillisecondScale );
- thread_call_func_delayed( ping, this, deadline );
- }
+ panic("");
}
-#endif
-OSOrderedSet * IOCatalogue::findDrivers( IOService * service,
- SInt32 * generationCount )
+/*********************************************************************
+*********************************************************************/
+OSOrderedSet *
+IOCatalogue::findDrivers(
+ IOService * service,
+ SInt32 * generationCount)
{
OSDictionary * nextTable;
OSOrderedSet * set;
- OSString * imports;
+ OSArray * array;
+ const OSMetaClass * meta;
+ unsigned int idx;
set = OSOrderedSet::withCapacity( 1, IOServiceOrdering,
(void *)gIOProbeScoreKey );
if( !set )
return( 0 );
- IOLockLock( lock );
- kernelTables->reset();
+ IORWLockRead(lock);
-#if CATALOGTEST
- int hackIndex = 0;
-#endif
- while( (nextTable = (OSDictionary *) kernelTables->getNextObject())) {
-#if CATALOGTEST
- if( hackIndex++ > hackLimit)
- break;
-#endif
- imports = OSDynamicCast( OSString,
- nextTable->getObject( gIOProviderClassKey ));
- if( imports && service->metaCast( imports ))
- set->setObject( nextTable );
+ meta = service->getMetaClass();
+ while (meta)
+ {
+ array = (OSArray *) personalities->getObject(meta->getClassNameSymbol());
+ if (array) for (idx = 0; (nextTable = (OSDictionary *) array->getObject(idx)); idx++)
+ {
+ set->setObject(nextTable);
+ }
+ if (meta == &IOService::gMetaClass) break;
+ meta = meta->getSuperClass();
}
*generationCount = getGenerationCount();
- IOLockUnlock( lock );
+ IORWLockUnlock(lock);
return( set );
}
-// Is personality already in the catalog?
-OSOrderedSet * IOCatalogue::findDrivers( OSDictionary * matching,
- SInt32 * generationCount)
+/*********************************************************************
+* Is personality already in the catalog?
+*********************************************************************/
+OSOrderedSet *
+IOCatalogue::findDrivers(
+ OSDictionary * matching,
+ SInt32 * generationCount)
{
+ OSCollectionIterator * iter;
OSDictionary * dict;
OSOrderedSet * set;
+ OSArray * array;
+ const OSSymbol * key;
+ unsigned int idx;
- UniqueProperties(matching);
+ OSKext::uniquePersonalityProperties(matching);
set = OSOrderedSet::withCapacity( 1, IOServiceOrdering,
(void *)gIOProbeScoreKey );
+ if (!set) return (0);
+ iter = OSCollectionIterator::withCollection(personalities);
+ if (!iter)
+ {
+ set->release();
+ return (0);
+ }
- IOLockLock( lock );
- kernelTables->reset();
- while ( (dict = (OSDictionary *) kernelTables->getNextObject()) ) {
-
- /* This comparison must be done with only the keys in the
- * "matching" dict to enable general searches.
- */
- if ( dict->isEqualTo(matching, matching) )
- set->setObject(dict);
+ IORWLockRead(lock);
+ while ((key = (const OSSymbol *) iter->getNextObject()))
+ {
+ array = (OSArray *) personalities->getObject(key);
+ if (array) for (idx = 0; (dict = (OSDictionary *) array->getObject(idx)); idx++)
+ {
+ /* This comparison must be done with only the keys in the
+ * "matching" dict to enable general searches.
+ */
+ if ( dict->isEqualTo(matching, matching) )
+ set->setObject(dict);
+ }
}
*generationCount = getGenerationCount();
- IOLockUnlock( lock );
+ IORWLockUnlock(lock);
+ iter->release();
return set;
}
-// Add a new personality to the set if it has a unique IOResourceMatchKey value.
-// XXX -- svail: This should be optimized.
-// esb - There doesn't seem like any reason to do this - it causes problems
-// esb - when there are more than one loadable driver matching on the same provider class
-static void AddNewImports( OSOrderedSet * set, OSDictionary * dict )
-{
- set->setObject(dict);
-}
+/*********************************************************************
+* Add driver config tables to catalog and start matching process.
+*
+* Important that existing personalities are kept (not replaced)
+* if duplicates found. Personalities can come from OSKext objects
+* or from userland kext library. We want to minimize distinct
+* copies between OSKext & IOCatalogue.
+*
+* xxx - userlib used to refuse to send personalities with IOKitDebug
+* xxx - during safe boot. That would be better implemented here.
+*********************************************************************/
-// Add driver config tables to catalog and start matching process.
-bool IOCatalogue::addDrivers(OSArray * drivers,
- bool doNubMatching )
+bool IOCatalogue::addDrivers(
+ OSArray * drivers,
+ bool doNubMatching)
{
- OSCollectionIterator * iter;
- OSDictionary * dict;
- OSOrderedSet * set;
- OSArray * persons;
- OSString * moduleName;
- bool ret;
-
- ret = true;
+ bool result = false;
+ OSCollectionIterator * iter = NULL; // must release
+ OSOrderedSet * set = NULL; // must release
+ OSObject * object = NULL; // do not release
+ OSArray * persons = NULL; // do not release
+
persons = OSDynamicCast(OSArray, drivers);
- if ( !persons )
- return false;
-
- iter = OSCollectionIterator::withCollection( persons );
- if (!iter )
- return false;
+ if (!persons) {
+ goto finish;
+ }
set = OSOrderedSet::withCapacity( 10, IOServiceOrdering,
- (void *)gIOProbeScoreKey );
- if ( !set ) {
- iter->release();
- return false;
+ (void *)gIOProbeScoreKey );
+ if (!set) {
+ goto finish;
}
- IOLockLock( lock );
- while ( (dict = (OSDictionary *) iter->getNextObject()) )
- {
- if ((moduleName = OSDynamicCast(OSString, dict->getObject("OSBundleModuleDemand"))))
- {
- IOLockUnlock( lock );
- ret = kmod_load_request(moduleName->getCStringNoCopy(), false);
- IOLockLock( lock );
- ret = true;
- }
- else
- {
- SInt count;
-
- UniqueProperties( dict );
+ iter = OSCollectionIterator::withCollection(persons);
+ if (!iter) {
+ goto finish;
+ }
+
+ /* Start with success; clear it on an error.
+ */
+ result = true;
+
+ IORWLockWrite(lock);
+ while ( (object = iter->getNextObject()) ) {
- // Add driver personality to catalogue.
+ // xxx Deleted OSBundleModuleDemand check; will handle in other ways for SL
+
+ OSDictionary * personality = OSDynamicCast(OSDictionary, object);
+
+ SInt count;
+
+ if (!personality) {
+ IOLog("IOCatalogue::addDrivers() encountered non-dictionary; bailing.\n");
+ result = false;
+ break;
+ }
+
+ OSKext::uniquePersonalityProperties(personality);
+
+ // Add driver personality to catalogue.
+
+ OSArray * array = arrayForPersonality(personality);
+ if (!array) addPersonality(personality);
+ else
+ {
count = array->getCount();
- while ( count-- ) {
+ while (count--) {
OSDictionary * driver;
-
+
// Be sure not to double up on personalities.
driver = (OSDictionary *)array->getObject(count);
-
- /* Unlike in other functions, this comparison must be exact!
+
+ /* Unlike in other functions, this comparison must be exact!
* The catalogue must be able to contain personalities that
* are proper supersets of others.
* Do not compare just the properties present in one driver
- * pesonality or the other.
+ * personality or the other.
*/
- if (dict->isEqualTo(driver))
+ if (personality->isEqualTo(driver)) {
break;
+ }
}
- if (count >= 0)
+ if (count >= 0) {
// its a dup
continue;
-
- ret = array->setObject( dict );
- if (!ret)
+ }
+ result = array->setObject(personality);
+ if (!result) {
break;
-
- AddNewImports( set, dict );
- }
+ }
+ }
+
+ set->setObject(personality);
}
// Start device matching.
- if (doNubMatching && (set->getCount() > 0)) {
- IOService::catalogNewDrivers( set );
+ if (result && doNubMatching && (set->getCount() > 0)) {
+ IOService::catalogNewDrivers(set);
generation++;
}
- IOLockUnlock( lock );
+ IORWLockUnlock(lock);
- set->release();
- iter->release();
-
- return ret;
+finish:
+ if (set) set->release();
+ if (iter) iter->release();
+
+ return result;
}
-// Remove drivers from the catalog which match the
-// properties in the matching dictionary.
-bool IOCatalogue::removeDrivers( OSDictionary * matching,
- bool doNubMatching)
+/*********************************************************************
+* Remove drivers from the catalog which match the
+* properties in the matching dictionary.
+*********************************************************************/
+bool
+IOCatalogue::removeDrivers(
+ OSDictionary * matching,
+ bool doNubMatching)
{
- OSCollectionIterator * tables;
- OSDictionary * dict;
OSOrderedSet * set;
- OSArray * arrayCopy;
+ OSCollectionIterator * iter;
+ OSDictionary * dict;
+ OSArray * array;
+ const OSSymbol * key;
+ unsigned int idx;
if ( !matching )
return false;
-
+
set = OSOrderedSet::withCapacity(10,
IOServiceOrdering,
(void *)gIOProbeScoreKey);
if ( !set )
return false;
-
- arrayCopy = OSArray::withCapacity(100);
- if ( !arrayCopy ) {
- set->release();
- return false;
- }
-
- tables = OSCollectionIterator::withCollection(arrayCopy);
- arrayCopy->release();
- if ( !tables ) {
- set->release();
- return false;
+ iter = OSCollectionIterator::withCollection(personalities);
+ if (!iter)
+ {
+ set->release();
+ return (false);
}
- UniqueProperties( matching );
-
- IOLockLock( lock );
- kernelTables->reset();
- arrayCopy->merge(array);
- array->flushCollection();
- tables->reset();
- while ( (dict = (OSDictionary *)tables->getNextObject()) ) {
-
- /* This comparison must be done with only the keys in the
- * "matching" dict to enable general searches.
- */
- if ( dict->isEqualTo(matching, matching) ) {
- AddNewImports( set, dict );
- continue;
+ IORWLockWrite(lock);
+ while ((key = (const OSSymbol *) iter->getNextObject()))
+ {
+ array = (OSArray *) personalities->getObject(key);
+ if (array) for (idx = 0; (dict = (OSDictionary *) array->getObject(idx)); idx++)
+ {
+ /* This comparison must be done with only the keys in the
+ * "matching" dict to enable general searches.
+ */
+ if ( dict->isEqualTo(matching, matching) ) {
+ set->setObject(dict);
+ array->removeObject(idx);
+ idx--;
+ }
+ }
+ // Start device matching.
+ if ( doNubMatching && (set->getCount() > 0) ) {
+ IOService::catalogNewDrivers(set);
+ generation++;
}
-
- array->setObject(dict);
- }
- // Start device matching.
- if ( doNubMatching && (set->getCount() > 0) ) {
- IOService::catalogNewDrivers(set);
- generation++;
}
- IOLockUnlock( lock );
-
+ IORWLockUnlock(lock);
+
set->release();
- tables->release();
+ iter->release();
return true;
}
// Return the generation count.
-SInt32 IOCatalogue::getGenerationCount( void ) const
+SInt32 IOCatalogue::getGenerationCount(void) const
{
return( generation );
}
-bool IOCatalogue::isModuleLoaded( OSString * moduleName ) const
+bool IOCatalogue::isModuleLoaded(OSString * moduleName) const
{
return isModuleLoaded(moduleName->getCStringNoCopy());
}
-bool IOCatalogue::isModuleLoaded( const char * moduleName ) const
+bool IOCatalogue::isModuleLoaded(const char * moduleName) const
{
- return (kmod_load_request(moduleName, true));
+ OSReturn ret;
+ ret = OSKext::loadKextWithIdentifier(moduleName);
+ if (kOSKextReturnDeferred == ret) {
+ // a request has been queued but the module isn't necessarily
+ // loaded yet, so stall.
+ return false;
+ }
+ // module is present or never will be
+ return true;
}
// Check to see if module has been loaded already.
-bool IOCatalogue::isModuleLoaded( OSDictionary * driver ) const
+bool IOCatalogue::isModuleLoaded(OSDictionary * driver) const
{
OSString * moduleName = NULL;
+ OSString * publisherName = NULL;
if ( !driver )
return false;
+ /* The personalities of codeless kexts often contain the bundle ID of the
+ * kext they reference, and not the bundle ID of the codeless kext itself.
+ * The prelinked kernel needs to know the bundle ID of the codeless kext
+ * so it can include these personalities, so OSKext stores that bundle ID
+ * in the IOPersonalityPublisher key, and we record it as requested here.
+ */
+ publisherName = OSDynamicCast(OSString,
+ driver->getObject(kIOPersonalityPublisherKey));
+ OSKext::recordIdentifierRequest(publisherName);
+
moduleName = OSDynamicCast(OSString, driver->getObject(gIOModuleIdentifierKey));
if ( moduleName )
return isModuleLoaded(moduleName);
return true;
}
-// This function is called after a module has been loaded.
-void IOCatalogue::moduleHasLoaded( OSString * moduleName )
+/* This function is called after a module has been loaded.
+ * Is invoked from user client call, ultimately from IOKitLib's
+ * IOCatalogueModuleLoaded(). Sent from kextd.
+ */
+void IOCatalogue::moduleHasLoaded(OSString * moduleName)
{
- OSDictionary * dict;
+ OSDictionary * dict;
dict = OSDictionary::withCapacity(2);
dict->setObject(gIOModuleIdentifierKey, moduleName);
startMatching(dict);
dict->release();
+
+ (void) OSKext::setDeferredLoadSucceeded();
+ (void) OSKext::considerRebuildOfPrelinkedKernel();
}
-void IOCatalogue::moduleHasLoaded( const char * moduleName )
+void IOCatalogue::moduleHasLoaded(const char * moduleName)
{
- OSString * name;
+ OSString * name;
name = OSString::withCString(moduleName);
moduleHasLoaded(name);
name->release();
}
-IOReturn IOCatalogue::unloadModule( OSString * moduleName ) const
+// xxx - return is really OSReturn/kern_return_t
+IOReturn IOCatalogue::unloadModule(OSString * moduleName) const
{
- kmod_info_t * k_info = 0;
- kern_return_t ret;
- const char * name;
-
- ret = kIOReturnBadArgument;
- if ( moduleName ) {
- name = moduleName->getCStringNoCopy();
- k_info = kmod_lookupbyname_locked((char *)name);
- if ( k_info && (k_info->reference_count < 1) ) {
- if ( k_info->stop &&
- !((ret = k_info->stop(k_info, 0)) == kIOReturnSuccess) ) {
-
- kfree((vm_offset_t) k_info, sizeof(kmod_info_t));
- return ret;
- }
-
- ret = kmod_destroy(host_priv_self(), k_info->id);
- }
- }
-
- if (k_info) {
- kfree((vm_offset_t) k_info, sizeof(kmod_info_t));
- }
-
- return ret;
+ return OSKext::removeKextWithIdentifier(moduleName->getCStringNoCopy());
}
-static IOReturn _terminateDrivers( OSArray * array, OSDictionary * matching )
+IOReturn IOCatalogue::_terminateDrivers(OSDictionary * matching)
{
- OSCollectionIterator * tables;
OSDictionary * dict;
OSIterator * iter;
- OSArray * arrayCopy;
IOService * service;
IOReturn ret;
if ( !iter )
return kIOReturnNoMemory;
- UniqueProperties( matching );
+ OSKext::uniquePersonalityProperties( matching );
// terminate instances.
do {
} while( !service && !iter->isValid());
iter->release();
- // remove configs from catalog.
- if ( ret != kIOReturnSuccess )
- return ret;
-
- arrayCopy = OSArray::withCapacity(100);
- if ( !arrayCopy )
- return kIOReturnNoMemory;
+ return ret;
+}
- tables = OSCollectionIterator::withCollection(arrayCopy);
- arrayCopy->release();
- if ( !tables )
- return kIOReturnNoMemory;
+IOReturn IOCatalogue::_removeDrivers(OSDictionary * matching)
+{
+ IOReturn ret = kIOReturnSuccess;
+ OSCollectionIterator * iter;
+ OSDictionary * dict;
+ OSArray * array;
+ const OSSymbol * key;
+ unsigned int idx;
- arrayCopy->merge(array);
- array->flushCollection();
- tables->reset();
- while ( (dict = (OSDictionary *)tables->getNextObject()) ) {
+ // remove configs from catalog.
- /* Remove from the catalogue's array any personalities
- * that match the matching dictionary.
- * This comparison must be done with only the keys in the
- * "matching" dict to enable general matching.
- */
- if ( dict->isEqualTo(matching, matching) )
- continue;
+ iter = OSCollectionIterator::withCollection(personalities);
+ if (!iter) return (kIOReturnNoMemory);
- array->setObject(dict);
+ while ((key = (const OSSymbol *) iter->getNextObject()))
+ {
+ array = (OSArray *) personalities->getObject(key);
+ if (array) for (idx = 0; (dict = (OSDictionary *) array->getObject(idx)); idx++)
+ {
+
+ /* Remove from the catalogue's array any personalities
+ * that match the matching dictionary.
+ * This comparison must be done with only the keys in the
+ * "matching" dict to enable general matching.
+ */
+ if (dict->isEqualTo(matching, matching))
+ {
+ array->removeObject(idx);
+ idx--;
+ }
+ }
}
-
- tables->release();
+ iter->release();
return ret;
}
-IOReturn IOCatalogue::terminateDrivers( OSDictionary * matching )
+IOReturn IOCatalogue::terminateDrivers(OSDictionary * matching)
{
IOReturn ret;
- ret = kIOReturnSuccess;
- IOLockLock( lock );
- ret = _terminateDrivers(array, matching);
- kernelTables->reset();
- IOLockUnlock( lock );
+ ret = _terminateDrivers(matching);
+ IORWLockWrite(lock);
+ if (kIOReturnSuccess == ret)
+ ret = _removeDrivers(matching);
+ IORWLockUnlock(lock);
return ret;
}
IOReturn IOCatalogue::terminateDriversForModule(
- OSString * moduleName,
- bool unload )
+ OSString * moduleName,
+ bool unload)
{
IOReturn ret;
OSDictionary * dict;
+ bool isLoaded = false;
+
+ /* Check first if the kext currently has any linkage dependents;
+ * in such a case the unload would fail so let's not terminate any
+ * IOServices (since doing so typically results in a panic when there
+ * are loaded dependencies). Note that we aren't locking the kext here
+ * so it might lose or gain dependents by the time we call unloadModule();
+ * I think that's ok, our unload can fail if a kext comes in on top of
+ * this one even after we've torn down IOService objects. Conversely,
+ * if we fail the unload here and then lose a library, the autounload
+ * thread will get us in short order.
+ */
+ if (OSKext::isKextWithIdentifierLoaded(moduleName->getCStringNoCopy())) {
+
+ isLoaded = true;
+ if (!OSKext::canUnloadKextWithIdentifier(moduleName,
+ /* checkClasses */ false)) {
+ ret = kOSKextReturnInUse;
+ goto finish;
+ }
+ }
dict = OSDictionary::withCapacity(1);
- if ( !dict )
- return kIOReturnNoMemory;
+ if (!dict) {
+ ret = kIOReturnNoMemory;
+ goto finish;
+ }
dict->setObject(gIOModuleIdentifierKey, moduleName);
- IOLockLock( lock );
-
- ret = _terminateDrivers(array, dict);
- kernelTables->reset();
+ ret = _terminateDrivers(dict);
+
+ /* No goto between IOLock calls!
+ */
+ IORWLockWrite(lock);
+ if (kIOReturnSuccess == ret) {
+ ret = _removeDrivers(dict);
+ }
// Unload the module itself.
- if ( unload && ret == kIOReturnSuccess ) {
- // Do kmod stop first.
+ if (unload && isLoaded && ret == kIOReturnSuccess) {
ret = unloadModule(moduleName);
}
- IOLockUnlock( lock );
+ IORWLockUnlock(lock);
dict->release();
+finish:
return ret;
}
IOReturn IOCatalogue::terminateDriversForModule(
- const char * moduleName,
- bool unload )
+ const char * moduleName,
+ bool unload)
{
OSString * name;
IOReturn ret;
bool IOCatalogue::startMatching( OSDictionary * matching )
{
+ OSCollectionIterator * iter;
OSDictionary * dict;
OSOrderedSet * set;
+ OSArray * array;
+ const OSSymbol * key;
+ unsigned int idx;
if ( !matching )
return false;
if ( !set )
return false;
- IOLockLock( lock );
- kernelTables->reset();
+ iter = OSCollectionIterator::withCollection(personalities);
+ if (!iter)
+ {
+ set->release();
+ return false;
+ }
- while ( (dict = (OSDictionary *)kernelTables->getNextObject()) ) {
+ IORWLockRead(lock);
- /* This comparison must be done with only the keys in the
- * "matching" dict to enable general matching.
- */
- if ( dict->isEqualTo(matching, matching) )
- AddNewImports(set, dict);
+ while ((key = (const OSSymbol *) iter->getNextObject()))
+ {
+ array = (OSArray *) personalities->getObject(key);
+ if (array) for (idx = 0; (dict = (OSDictionary *) array->getObject(idx)); idx++)
+ {
+ /* This comparison must be done with only the keys in the
+ * "matching" dict to enable general matching.
+ */
+ if (dict->isEqualTo(matching, matching)) {
+ set->setObject(dict);
+ }
+ }
}
+
// Start device matching.
if ( set->getCount() > 0 ) {
IOService::catalogNewDrivers(set);
generation++;
}
- IOLockUnlock( lock );
+ IORWLockUnlock(lock);
set->release();
+ iter->release();
return true;
}
void IOCatalogue::reset(void)
{
- IOLog("Resetting IOCatalogue.\n");
+ IOCatalogue::resetAndAddDrivers(/* no drivers; true reset */ NULL,
+ /* doMatching */ false);
+ return;
}
-bool IOCatalogue::serialize(OSSerialize * s) const
+bool IOCatalogue::resetAndAddDrivers(OSArray * drivers, bool doNubMatching)
{
- bool ret;
+ bool result = false;
+ OSArray * newPersonalities = NULL; // do not release
+ OSCollectionIterator * iter = NULL; // must release
+ OSOrderedSet * matchSet = NULL; // must release
+ const OSSymbol * key;
+ OSArray * array;
+ OSDictionary * thisNewPersonality = NULL; // do not release
+ OSDictionary * thisOldPersonality = NULL; // do not release
+ OSDictionary * myKexts = NULL; // must release
+ signed int idx, newIdx;
+
+ if (drivers) {
+ newPersonalities = OSDynamicCast(OSArray, drivers);
+ if (!newPersonalities) {
+ goto finish;
+ }
+ }
+ matchSet = OSOrderedSet::withCapacity(10, IOServiceOrdering,
+ (void *)gIOProbeScoreKey);
+ if (!matchSet) {
+ goto finish;
+ }
+ iter = OSCollectionIterator::withCollection(personalities);
+ if (!iter) {
+ goto finish;
+ }
- if ( !s )
- return false;
+ /* need copy of loaded kexts so we can check if for loaded modules without
+ * taking the OSKext lock. There is a potential of deadlocking if we get
+ * an OSKext via the normal path. See 14672140.
+ */
+ myKexts = OSKext::copyKexts();
+
+ result = true;
- IOLockLock( lock );
+ IOLog("Resetting IOCatalogue.\n");
- ret = array->serialize(s);
+ /* No goto finish from here to unlock.
+ */
+ IORWLockWrite(lock);
+
+ while ((key = (const OSSymbol *) iter->getNextObject()))
+ {
+ array = (OSArray *) personalities->getObject(key);
+ if (!array) continue;
+
+ for (idx = 0;
+ (thisOldPersonality = (OSDictionary *) array->getObject(idx));
+ idx++)
+ {
+ if (thisOldPersonality->getObject("KernelConfigTable")) continue;
+ thisNewPersonality = NULL;
+
+ if (newPersonalities) {
+ for (newIdx = 0;
+ (thisNewPersonality = (OSDictionary *) newPersonalities->getObject(newIdx));
+ newIdx++)
+ {
+ /* Unlike in other functions, this comparison must be exact!
+ * The catalogue must be able to contain personalities that
+ * are proper supersets of others.
+ * Do not compare just the properties present in one driver
+ * personality or the other.
+ */
+ if (OSDynamicCast(OSDictionary, thisNewPersonality) == NULL) {
+ /* skip thisNewPersonality if it is not an OSDictionary */
+ continue;
+ }
+ if (thisNewPersonality->isEqualTo(thisOldPersonality))
+ break;
+ }
+ }
+ if (thisNewPersonality) {
+ // dup, ignore
+ newPersonalities->removeObject(newIdx);
+ }
+ else {
+ // not in new set - remove
+ // only remove dictionary if this module in not loaded - 9953845
+ if ( isModuleLoadedNoOSKextLock(myKexts, thisOldPersonality) == false ) {
+ if (matchSet) {
+ matchSet->setObject(thisOldPersonality);
+ }
+ array->removeObject(idx);
+ idx--;
+ }
+ }
+ } // for...
+ } // while...
+
+ // add new
+ if (newPersonalities) {
+ for (newIdx = 0;
+ (thisNewPersonality = (OSDictionary *) newPersonalities->getObject(newIdx));
+ newIdx++)
+ {
+ if (OSDynamicCast(OSDictionary, thisNewPersonality) == NULL) {
+ /* skip thisNewPersonality if it is not an OSDictionary */
+ continue;
+ }
+
+ OSKext::uniquePersonalityProperties(thisNewPersonality);
+ addPersonality(thisNewPersonality);
+ matchSet->setObject(thisNewPersonality);
+ }
+ }
+
+ /* Finally, start device matching on all new & removed personalities.
+ */
+ if (result && doNubMatching && (matchSet->getCount() > 0)) {
+ IOService::catalogNewDrivers(matchSet);
+ generation++;
+ }
- IOLockUnlock( lock );
+ IORWLockUnlock(lock);
- return ret;
+finish:
+ if (matchSet) matchSet->release();
+ if (iter) iter->release();
+ if (myKexts) myKexts->release();
+
+ return result;
+}
+
+bool IOCatalogue::serialize(OSSerialize * s) const
+{
+ if ( !s )
+ return false;
+
+ return super::serialize(s);
}
bool IOCatalogue::serializeData(IOOptionBits kind, OSSerialize * s) const
switch ( kind )
{
case kIOCatalogGetContents:
- if (!serialize(s))
- kr = kIOReturnNoMemory;
+ kr = KERN_NOT_SUPPORTED;
break;
case kIOCatalogGetModuleDemandList:
- IOLockLock( lock );
- if (!gIOCatalogModuleRequests->serialize(s))
- kr = kIOReturnNoMemory;
- IOLockUnlock( lock );
+ kr = KERN_NOT_SUPPORTED;
break;
case kIOCatalogGetCacheMissList:
- IOLockLock( lock );
- if (!gIOCatalogCacheMisses->serialize(s))
- kr = kIOReturnNoMemory;
- IOLockUnlock( lock );
+ kr = KERN_NOT_SUPPORTED;
break;
case kIOCatalogGetROMMkextList:
- IOLockLock( lock );
-
- if (!gIOCatalogROMMkexts || !gIOCatalogROMMkexts->getCount())
- kr = kIOReturnNoResources;
- else if (!gIOCatalogROMMkexts->serialize(s))
- kr = kIOReturnNoMemory;
-
- if (gIOCatalogROMMkexts)
- {
- gIOCatalogROMMkexts->release();
- gIOCatalogROMMkexts = 0;
- }
-
- IOLockUnlock( lock );
+ kr = KERN_NOT_SUPPORTED;
break;
default:
return kr;
}
-
-bool IOCatalogue::recordStartupExtensions(void) {
- bool result = false;
-
- IOLockLock(kld_lock);
- if (kernelLinkerPresent && record_startup_extensions_function) {
- result = (*record_startup_extensions_function)();
- } else {
- IOLog("Can't record startup extensions; "
- "kernel linker is not present.\n");
- result = false;
- }
- IOLockUnlock(kld_lock);
-
- return result;
-}
-
-
-/*********************************************************************
-*********************************************************************/
-bool IOCatalogue::addExtensionsFromArchive(OSData * mkext)
+/* isModuleLoadedNoOSKextLock - used to check to see if a kext is loaded
+ * without taking the OSKext lock. We use this to avoid the problem
+ * where taking the IOCatalog lock then the OSKext lock will dealock when
+ * a kext load or unload is happening at the same time as IOCatalog changing.
+ *
+ * theKexts - is a dictionary of current kexts (from OSKext::copyKexts) with
+ * key set to the kext bundle ID and value set to an OSKext object
+ * theModuleDict - is an IOKit personality dictionary for a given module (kext)
+ */
+static bool isModuleLoadedNoOSKextLock(OSDictionary *theKexts,
+ OSDictionary *theModuleDict)
{
- OSData * copyData;
- bool result = false;
- bool prelinked;
+ bool myResult = false;
+ const OSString * myBundleID = NULL; // do not release
+ OSKext * myKext = NULL; // do not release
- /* The mkext we've been handed (or the data it references) can go away,
- * so we need to make a local copy to keep around as long as it might
- * be needed.
- */
- copyData = OSData::withData(mkext);
- if (copyData)
- {
- struct section * infosect;
+ if (theKexts == NULL || theModuleDict == NULL) {
+ return( myResult );
+ }
- infosect = getsectbyname("__PRELINK", "__info");
- prelinked = (infosect && infosect->addr && infosect->size);
-
- IOLockLock(kld_lock);
-
- if (gIOCatalogROMMkexts)
- gIOCatalogROMMkexts->setObject(copyData);
-
- if (prelinked) {
- result = true;
- } else if (kernelLinkerPresent && add_from_mkext_function) {
- result = (*add_from_mkext_function)(copyData);
- } else {
- IOLog("Can't add startup extensions from archive; "
- "kernel linker is not present.\n");
- result = false;
- }
-
- IOLockUnlock(kld_lock);
-
- copyData->release();
+ // gIOModuleIdentifierKey is "CFBundleIdentifier"
+ myBundleID = OSDynamicCast(OSString,
+ theModuleDict->getObject(gIOModuleIdentifierKey));
+ if (myBundleID == NULL) {
+ return( myResult );
}
- return result;
+ myKext = OSDynamicCast(OSKext, theKexts->getObject(myBundleID->getCStringNoCopy()));
+ if (myKext) {
+ myResult = myKext->isLoaded();
+ }
+
+ return( myResult );
}
+#if PRAGMA_MARK
+#pragma mark Obsolete Kext Loading Stuff
+#endif
/*********************************************************************
-* This function clears out all references to the in-kernel linker,
-* frees the list of startup extensions in extensionDict, and
-* deallocates the kernel's __KLD segment to reclaim that memory.
-*********************************************************************/
-kern_return_t IOCatalogue::removeKernelLinker(void) {
- kern_return_t result = KERN_SUCCESS;
- struct segment_command * segment;
- char * dt_segment_name;
- void * segment_paddress;
- int segment_size;
-
- /* This must be the very first thing done by this function.
- */
- IOLockLock(kld_lock);
-
-
- /* If the kernel linker isn't here, that's automatically
- * a success.
- */
- if (!kernelLinkerPresent) {
- result = KERN_SUCCESS;
- goto finish;
- }
-
- IOLog("Jettisoning kernel linker.\n");
-
- kernelLinkerPresent = 0;
-
- /* Set the kmod_load_extension function as the means for loading
- * a kernel extension.
- */
- kmod_load_function = &kmod_load_extension;
-
- record_startup_extensions_function = 0;
- add_from_mkext_function = 0;
- remove_startup_extension_function = 0;
-
-
- /* Invoke destructors for the __KLD and __LINKEDIT segments.
- * Do this for all segments before actually freeing their
- * memory so that any cross-dependencies (not that there
- * should be any) are handled.
- */
- segment = getsegbyname("__KLD");
- if (!segment) {
- IOLog("error removing kernel linker: can't find %s segment\n",
- "__KLD");
- result = KERN_FAILURE;
- goto finish;
- }
- OSRuntimeUnloadCPPForSegment(segment);
-
- segment = getsegbyname("__LINKEDIT");
- if (!segment) {
- IOLog("error removing kernel linker: can't find %s segment\n",
- "__LINKEDIT");
- result = KERN_FAILURE;
- goto finish;
- }
- OSRuntimeUnloadCPPForSegment(segment);
-
-
- /* Free the memory that was set up by bootx.
- */
- dt_segment_name = "Kernel-__KLD";
- if (0 == IODTGetLoaderInfo(dt_segment_name, &segment_paddress, &segment_size)) {
- IODTFreeLoaderInfo(dt_segment_name, (void *)segment_paddress,
- (int)segment_size);
- }
-
- dt_segment_name = "Kernel-__LINKEDIT";
- if (0 == IODTGetLoaderInfo(dt_segment_name, &segment_paddress, &segment_size)) {
- IODTFreeLoaderInfo(dt_segment_name, (void *)segment_paddress,
- (int)segment_size);
- }
-
- struct section * sect;
- sect = getsectbyname("__PRELINK", "__symtab");
- if (sect && sect->addr)
- {
- vm_offset_t
- virt = ml_static_ptovirt(sect->addr);
- if( virt) {
- ml_static_mfree(virt, sect->size);
- }
- }
-
-finish:
-
- /* This must be the very last thing done before returning.
- */
- IOLockUnlock(kld_lock);
-
- return result;
-}
+**********************************************************************
+*** BINARY COMPATIBILITY SECTION ***
+**********************************************************************
+**********************************************************************
+* These functions are no longer used are necessary for C++ binary
+* compatibility on i386.
+**********************************************************************/
projects / apple / xnu.git / blobdiff