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--- xnu/xnu-12377.101.15/libsa/bootstrap.cpp
+++ xnu/xnu-792.6.56/libsa/bootstrap.cpp
@@ -1,20 +1,15 @@
/*
- * Copyright (c) 2000-2012 Apple Inc. All rights reserved.
+ * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
*
- * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
- *
+ * @APPLE_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.
- *
+ * 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.
+ *
* 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,
@@ -22,778 +17,80 @@
* 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@
+ *
+ * @APPLE_LICENSE_HEADER_END@
*/
-extern "C" {
+#include <IOKit/IOLib.h>
#include <mach/kmod.h>
-#include <libkern/kernel_mach_header.h>
-#include <libkern/prelink.h>
-#include <libkern/crypto/sha2.h>
+#include <libkern/c++/OSDictionary.h>
+
+#include <libsa/kext.h>
+#include <libsa/catalogue.h>
+#include <libsa/malloc.h>
+
+#include "kld_patch.h"
+
+/*****
+ * This function is used by IOCatalogue to load a kernel
+ * extension. libsa initially sets it to be a function
+ * that uses libkld to load and link the extension from
+ * within the kernel. Once the root filesystem is up,
+ * this gets switch to the kmod_load_extension() function,
+ * which merely queues the extension for loading by the
+ * kmodload utility.
+ */
+extern kern_return_t (*kmod_load_function)(char *extension_name);
+extern bool (*record_startup_extensions_function)(void);
+extern bool (*add_from_mkext_function)(OSData * mkext);
+extern void (*remove_startup_extension_function)(const char * name);
+
+/****
+ * IOCatalogue uses this variable to make a few decisions
+ * about loading and matching drivers.
+ */
+extern int kernelLinkerPresent;
+
+
+class KLDBootstrap {
+public:
+ KLDBootstrap();
+ ~KLDBootstrap();
+};
+
+
+static KLDBootstrap bootstrap_obj;
+
+
+/* The constructor creates a lock and puts entries into a dispatch
+ * table for functions used to record and load kmods.
+ */
+KLDBootstrap::KLDBootstrap() {
+
+ malloc_init();
+
+ kmod_load_function = &load_kernel_extension;
+
+ record_startup_extensions_function = &recordStartupExtensions;
+ add_from_mkext_function = &addExtensionsFromArchive;
+ remove_startup_extension_function = &removeStartupExtension;
+
+ kernelLinkerPresent = 1;
}
-#define IOKIT_ENABLE_SHARED_PTR
+/* The destructor frees all wired memory regions held
+ * by libsa's malloc package and disposes of the lock.
+ */
+KLDBootstrap::~KLDBootstrap() {
-#include <libkern/version.h>
-#include <libkern/c++/OSContainers.h>
-#include <libkern/OSKextLibPrivate.h>
-#include <libkern/c++/OSKext.h>
-#include <IOKit/IOLib.h>
-#include <IOKit/IOService.h>
-#include <IOKit/IODeviceTreeSupport.h>
-#include <IOKit/IOCatalogue.h>
+ kld_file_cleanup_all_resources();
-#if __x86_64__
-#define KASLR_KEXT_DEBUG 0
-#endif
+ /* Dump all device-tree entries for boot drivers, and all
+ * info on startup extensions. The IOCatalogue will now
+ * get personalities from kextd.
+ */
+ clearStartupExtensionsAndLoaderInfo();
-#if PRAGMA_MARK
-#pragma mark Bootstrap Declarations
-#endif
-/*********************************************************************
-* Bootstrap Declarations
-*
-* The ENTIRE point of the libsa/KLD segment is to isolate bootstrap
-* code from other parts of the kernel, so function symbols are not
-* exported; rather pointers to those functions are exported.
-*
-* xxx - need to think about locking for handling the 'weak' refs.
-* xxx - do export a non-KLD function that says you've called a
-* xxx - bootstrap function that has been removed.
-*
-* ALL call-ins to this segment of the kernel must be done through
-* exported pointers. The symbols themselves are private and not to
-* be linked against.
-*********************************************************************/
-extern "C" {
-extern void (*record_startup_extensions_function)(void);
-extern void (*load_security_extensions_function)(void);
-};
-
-static void bootstrapRecordStartupExtensions(void);
-static void bootstrapLoadSecurityExtensions(void);
-
-
-#if NO_KEXTD
-extern "C" bool IORamDiskBSDRoot(void);
-#endif
-
-#if PRAGMA_MARK
-#pragma mark Macros
-#endif
-/*********************************************************************
-* Macros
-*********************************************************************/
-#define CONST_STRLEN(str) (sizeof(str) - 1)
-
-#if PRAGMA_MARK
-#pragma mark Kernel Component Kext Identifiers
-#endif
-/*********************************************************************
-* Kernel Component Kext Identifiers
-*
-* We could have each kernel resource kext automatically "load" as
-* it's created, but it's nicer to have them listed in kextstat in
-* the order of this list. We'll walk through this after setting up
-* all the boot kexts and have them load up.
-*********************************************************************/
-static const char * sKernelComponentNames[] = {
- // The kexts for these IDs must have a version matching 'osrelease'.
- "com.apple.kernel",
- "com.apple.kpi.bsd",
- "com.apple.kpi.dsep",
- "com.apple.kpi.iokit",
- "com.apple.kpi.kasan",
- "com.apple.kpi.kcov",
- "com.apple.kpi.libkern",
- "com.apple.kpi.mach",
- "com.apple.kpi.private",
- "com.apple.kpi.unsupported",
- "com.apple.iokit.IONVRAMFamily",
- "com.apple.driver.AppleNMI",
- "com.apple.iokit.IOSystemManagementFamily",
- "com.apple.iokit.ApplePlatformFamily",
- NULL
-};
-
-#if PRAGMA_MARK
-#pragma mark KLDBootstrap Class
-#endif
-/*********************************************************************
-* KLDBootstrap Class
-*
-* We use a C++ class here so that it can be a friend of OSKext and
-* get at private stuff. We can't hide the class itself, but we can
-* hide the instance through which we invoke the functions.
-*********************************************************************/
-class KLDBootstrap {
- friend void bootstrapRecordStartupExtensions(void);
- friend void bootstrapLoadSecurityExtensions(void);
-
-private:
- void readStartupExtensions(void);
-
- void readPrelinkedExtensions(kernel_mach_header_t *mh, kc_kind_t type);
- void readBooterExtensions(void);
-
- OSReturn loadKernelComponentKexts(void);
- void loadKernelExternalComponents(void);
- void readBuiltinPersonalities(void);
-
- void loadSecurityExtensions(void);
-
-public:
- KLDBootstrap(void);
- ~KLDBootstrap(void);
-};
-
-LIBKERN_ALWAYS_DESTROY static KLDBootstrap sBootstrapObject;
-
-/*********************************************************************
-* Set the function pointers for the entry points into the bootstrap
-* segment upon C++ static constructor invocation.
-*********************************************************************/
-KLDBootstrap::KLDBootstrap(void)
-{
- if (this != &sBootstrapObject) {
- panic("Attempt to access bootstrap segment.");
- }
- record_startup_extensions_function = &bootstrapRecordStartupExtensions;
- load_security_extensions_function = &bootstrapLoadSecurityExtensions;
+ /* Free all temporary malloc memory.
+ */
+ malloc_reset();
}
-
-/*********************************************************************
-* Clear the function pointers for the entry points into the bootstrap
-* segment upon C++ static destructor invocation.
-*********************************************************************/
-KLDBootstrap::~KLDBootstrap(void)
-{
- if (this != &sBootstrapObject) {
- panic("Attempt to access bootstrap segment.");
- }
-
-
- record_startup_extensions_function = NULL;
- load_security_extensions_function = NULL;
-}
-
-/*********************************************************************
-*********************************************************************/
-void
-KLDBootstrap::readStartupExtensions(void)
-{
- kernel_section_t * prelinkInfoSect = NULL; // do not free
-
- OSKextLog(/* kext */ NULL,
- kOSKextLogProgressLevel |
- kOSKextLogGeneralFlag | kOSKextLogDirectoryScanFlag |
- kOSKextLogKextBookkeepingFlag,
- "Reading startup extensions.");
-
- kc_format_t kc_format;
- kernel_mach_header_t *mh = &_mh_execute_header;
- if (PE_get_primary_kc_format(&kc_format) && kc_format == KCFormatFileset) {
- mh = (kernel_mach_header_t *)PE_get_kc_header(KCKindPrimary);
- }
-
- /* If the prelink info segment has a nonzero size, we are prelinked
- * and won't have any individual kexts or mkexts to read.
- * Otherwise, we need to read kexts or the mkext from what the booter
- * has handed us.
- */
- prelinkInfoSect = getsectbynamefromheader(mh, kPrelinkInfoSegment, kPrelinkInfoSection);
- if (prelinkInfoSect->size) {
- readPrelinkedExtensions(mh, KCKindPrimary);
- } else {
- readBooterExtensions();
- }
-
- kernel_mach_header_t *akc_mh;
- akc_mh = (kernel_mach_header_t*)PE_get_kc_header(KCKindAuxiliary);
- if (akc_mh) {
- readPrelinkedExtensions(akc_mh, KCKindAuxiliary);
- }
-
- loadKernelComponentKexts();
- loadKernelExternalComponents();
- readBuiltinPersonalities();
- OSKext::sendAllKextPersonalitiesToCatalog(true);
-
- return;
-}
-
-/*********************************************************************
-*********************************************************************/
-void
-KLDBootstrap::readPrelinkedExtensions(kernel_mach_header_t *mh, kc_kind_t type)
-{
- bool ret;
- OSSharedPtr<OSData> loaded_kcUUID;
- OSSharedPtr<OSString> errorString;
- OSSharedPtr<OSObject> parsedXML;
- kernel_section_t *infoPlistSection = NULL;
- OSDictionary *infoDict = NULL; // do not release
-
- OSKextLog(/* kext */ NULL,
- kOSKextLogProgressLevel |
- kOSKextLogDirectoryScanFlag | kOSKextLogArchiveFlag,
- "Starting from prelinked kernel.");
-
- /*
- * The 'infoPlistSection' should contains an XML dictionary that
- * contains some meta data about the KC, and also describes each kext
- * included in the kext collection. Unserialize this dictionary and
- * then iterate over each kext.
- */
- infoPlistSection = getsectbynamefromheader(mh, kPrelinkInfoSegment, kPrelinkInfoSection);
- parsedXML = OSUnserializeXML((const char *)infoPlistSection->addr, errorString);
- if (parsedXML) {
- infoDict = OSDynamicCast(OSDictionary, parsedXML.get());
- }
-
- if (!infoDict) {
- const char *errorCString = "(unknown error)";
-
- if (errorString && errorString->getCStringNoCopy()) {
- errorCString = errorString->getCStringNoCopy();
- } else if (parsedXML) {
- errorCString = "not a dictionary";
- }
- OSKextLog(/* kext */ NULL, kOSKextLogErrorLevel | kOSKextLogArchiveFlag,
- "Error unserializing kext info plist section: %s.", errorCString);
- return;
- }
-
- /* Validate that the Kext Collection is prelinked to the loaded KC */
- if (type == KCKindAuxiliary) {
- if (OSKext::validateKCFileSetUUID(infoDict, KCKindAuxiliary) != 0) {
- OSKextLog(/* kext */ NULL, kOSKextLogErrorLevel | kOSKextLogArchiveFlag,
- "Early boot AuxKC doesn't appear to be linked against the loaded BootKC.");
- return;
- }
-
- /*
- * Defer further processing of the AuxKC, but keep the
- * processed info dictionary around so we can ml_static_free
- * the segment.
- */
- if (!OSKext::registerDeferredKextCollection(mh, parsedXML, KCKindAuxiliary)) {
- OSKextLog(/* kext */ NULL, kOSKextLogErrorLevel | kOSKextLogArchiveFlag,
- "Error deferring AuxKC kext processing: Kexts in this collection will be unusable.");
- }
- goto skip_adding_kexts;
- }
-
- /*
- * this function does all the heavy lifting of adding OSKext objects
- * and potentially sliding them if necessary
- */
- ret = OSKext::addKextsFromKextCollection(mh, infoDict,
- kPrelinkTextSegment, loaded_kcUUID, (mh->filetype == MH_FILESET) ? type : KCKindUnknown);
-
- if (!ret) {
- OSKextLog(/* kext */ NULL, kOSKextLogErrorLevel | kOSKextLogArchiveFlag,
- "Error loading kext info from prelinked primary KC");
- return;
- }
-
- /* Copy in the kernelcache UUID */
- if (!loaded_kcUUID) {
- OSKextLog(/* kext */ NULL, kOSKextLogErrorLevel | kOSKextLogArchiveFlag,
- "WARNING: did not find UUID in %s KC!", (type == KCKindAuxiliary) ? "Aux" : "Primary");
- } else if (type != KCKindAuxiliary) {
- kernelcache_uuid_valid = TRUE;
- memcpy((void *)&kernelcache_uuid, (const void *)loaded_kcUUID->getBytesNoCopy(), loaded_kcUUID->getLength());
- uuid_unparse_upper(kernelcache_uuid, kernelcache_uuid_string);
- } else {
- auxkc_uuid_valid = TRUE;
- memcpy((void *)&auxkc_uuid, (const void *)loaded_kcUUID->getBytesNoCopy(), loaded_kcUUID->getLength());
- uuid_unparse_upper(auxkc_uuid, auxkc_uuid_string);
- }
-
-skip_adding_kexts:
-#if CONFIG_KEXT_BASEMENT
- if (mh->filetype != MH_FILESET) {
- /*
- * On CONFIG_KEXT_BASEMENT systems which do _not_ boot the new
- * MH_FILESET kext collection, kexts are copied to their own
- * special VM region during OSKext init time, so we can free
- * the whole segment now.
- */
- kernel_segment_command_t *prelinkTextSegment = NULL;
- prelinkTextSegment = getsegbyname(kPrelinkTextSegment);
- if (!prelinkTextSegment) {
- OSKextLog(/* kext */ NULL,
- kOSKextLogErrorLevel | kOSKextLogArchiveFlag,
- "Can't find prelinked kexts' text segment.");
- return;
- }
-
- ml_static_mfree((vm_offset_t)prelinkTextSegment->vmaddr, prelinkTextSegment->vmsize);
- }
-#endif /* CONFIG_KEXT_BASEMENT */
-
- /*
- * Free the prelink info segment, we're done with it.
- */
-
-#if !XNU_TARGET_OS_OSX
- /*
- * For now, we are limiting this freeing to embedded platforms.
- * To enable freeing of prelink info segment on macOS, we need to
- * fix rdar://88929016
- */
- bool freedPrelinkInfo = false;
- kernel_segment_command_t *prelinkInfoSegment = NULL;
- prelinkInfoSegment = getsegbynamefromheader(mh, kPrelinkInfoSegment);
- if (prelinkInfoSegment) {
- if (prelinkInfoSegment->vmsize != 0) {
- freedPrelinkInfo = true;
- ml_static_mfree((vm_offset_t)prelinkInfoSegment->vmaddr,
- (vm_size_t)prelinkInfoSegment->vmsize);
- }
- }
-
- if (!freedPrelinkInfo) {
- OSKextLog(NULL, kOSKextLogErrorLevel | kOSKextLogArchiveFlag, "Failed to free prelink info.");
- }
-#endif
- return;
-}
-
-
-/*********************************************************************
-*********************************************************************/
-#define BOOTER_KEXT_PREFIX "Driver-"
-
-typedef struct _DeviceTreeBuffer {
- uint32_t paddr;
- uint32_t length;
-} _DeviceTreeBuffer;
-
-void
-KLDBootstrap::readBooterExtensions(void)
-{
- OSSharedPtr<IORegistryEntry> booterMemoryMap;
- OSSharedPtr<OSDictionary> propertyDict;
- OSSharedPtr<OSCollectionIterator> keyIterator;
- OSString * deviceTreeName = NULL;// do not release
-
- const _DeviceTreeBuffer * deviceTreeBuffer = NULL;// do not free
- char * booterDataPtr = NULL;// do not free
- OSSharedPtr<OSData> booterData;
- OSSharedPtr<OSKext> aKext;
-
- OSKextLog(/* kext */ NULL,
- kOSKextLogProgressLevel |
- kOSKextLogDirectoryScanFlag | kOSKextLogKextBookkeepingFlag,
- "Reading startup extensions from booter memory.");
-
- booterMemoryMap = IORegistryEntry::fromPath( "/chosen/memory-map", gIODTPlane);
-
- if (!booterMemoryMap) {
- OSKextLog(/* kext */ NULL,
- kOSKextLogErrorLevel |
- kOSKextLogGeneralFlag | kOSKextLogDirectoryScanFlag,
- "Can't read booter memory map.");
- goto finish;
- }
-
- propertyDict = booterMemoryMap->dictionaryWithProperties();
- if (!propertyDict) {
- OSKextLog(/* kext */ NULL,
- kOSKextLogErrorLevel |
- kOSKextLogDirectoryScanFlag,
- "Can't get property dictionary from memory map.");
- goto finish;
- }
-
- keyIterator = OSCollectionIterator::withCollection(propertyDict.get());
- if (!keyIterator) {
- OSKextLog(/* kext */ NULL,
- kOSKextLogErrorLevel |
- kOSKextLogGeneralFlag,
- "Can't allocate iterator for driver images.");
- goto finish;
- }
-
- /* Create dictionary of excluded kexts
- */
-#ifndef CONFIG_EMBEDDED
- OSKext::createExcludeListFromBooterData(propertyDict.get(), keyIterator.get());
-#endif
- // !! reset the iterator, not the pointer
- keyIterator->reset();
-
- while ((deviceTreeName =
- OSDynamicCast(OSString, keyIterator->getNextObject()))) {
- const char * devTreeNameCString = deviceTreeName->getCStringNoCopy();
- OSData * deviceTreeEntry = OSDynamicCast(OSData,
- propertyDict->getObject(deviceTreeName));
-
- /* If there is no entry for the name, we can't do much with it. */
- if (!deviceTreeEntry) {
- continue;
- }
-
- /* Make sure it is a kext */
- if (strncmp(devTreeNameCString,
- BOOTER_KEXT_PREFIX,
- CONST_STRLEN(BOOTER_KEXT_PREFIX))) {
- continue;
- }
-
- deviceTreeBuffer = (const _DeviceTreeBuffer *)
- deviceTreeEntry->getBytesNoCopy(0, sizeof(deviceTreeBuffer));
- if (!deviceTreeBuffer) {
- /* We can't get to the data, so we can't do anything,
- * not even free it from physical memory (if it's there).
- */
- OSKextLog(/* kext */ NULL,
- kOSKextLogErrorLevel |
- kOSKextLogDirectoryScanFlag,
- "Device tree entry %s has NULL pointer.",
- devTreeNameCString);
- goto finish; // xxx - continue, panic?
- }
-
- booterDataPtr = (char *)ml_static_ptovirt(deviceTreeBuffer->paddr);
- if (!booterDataPtr) {
- OSKextLog(/* kext */ NULL,
- kOSKextLogErrorLevel |
- kOSKextLogDirectoryScanFlag,
- "Can't get virtual address for device tree entry %s.",
- devTreeNameCString);
- goto finish;
- }
-
- /* Wrap the booter data buffer in an OSData and set a dealloc function
- * so it will take care of the physical memory when freed. Kexts will
- * retain the booterData for as long as they need it. Remove the entry
- * from the booter memory map after this is done.
- */
- booterData = OSData::withBytesNoCopy(booterDataPtr,
- deviceTreeBuffer->length);
- if (!booterData) {
- OSKextLog(/* kext */ NULL,
- kOSKextLogErrorLevel |
- kOSKextLogGeneralFlag,
- "Error - Can't allocate OSData wrapper for device tree entry %s.",
- devTreeNameCString);
- goto finish;
- }
- booterData->setDeallocFunction(osdata_phys_free);
-
- /* Create the kext for the entry, then release it, because the
- * kext system keeps them around until explicitly removed.
- * Any creation/registration failures are already logged for us.
- */
- OSSharedPtr<OSKext> newKext = OSKext::withBooterData(deviceTreeName, booterData.get());
-
- booterMemoryMap->removeProperty(deviceTreeName);
- } /* while ( (deviceTreeName = OSDynamicCast(OSString, ...) ) ) */
-
-finish:
- return;
-}
-
-/*********************************************************************
-*********************************************************************/
-#define COM_APPLE "com.apple."
-
-void
-KLDBootstrap::loadSecurityExtensions(void)
-{
- OSSharedPtr<OSDictionary> extensionsDict;
- OSSharedPtr<OSCollectionIterator> keyIterator;
- OSString * bundleID = NULL;// don't release
- OSKext * theKext = NULL;// don't release
-
- OSKextLog(/* kext */ NULL,
- kOSKextLogStepLevel |
- kOSKextLogLoadFlag,
- "Loading security extensions.");
-
- extensionsDict = OSKext::copyKexts();
- if (!extensionsDict) {
- return;
- }
-
- keyIterator = OSCollectionIterator::withCollection(extensionsDict.get());
- if (!keyIterator) {
- OSKextLog(/* kext */ NULL,
- kOSKextLogErrorLevel |
- kOSKextLogGeneralFlag,
- "Failed to allocate iterator for security extensions.");
- goto finish;
- }
-
- while ((bundleID = OSDynamicCast(OSString, keyIterator->getNextObject()))) {
- const char * bundle_id = bundleID->getCStringNoCopy();
-
- /* Skip extensions whose bundle IDs don't start with "com.apple.".
- */
- if (!bundle_id ||
- (strncmp(bundle_id, COM_APPLE, CONST_STRLEN(COM_APPLE)) != 0)) {
- continue;
- }
-
- theKext = OSDynamicCast(OSKext, extensionsDict->getObject(bundleID));
- if (!theKext) {
- continue;
- }
-
- if (kOSBooleanTrue == theKext->getPropertyForHostArch(kAppleSecurityExtensionKey)) {
- OSKextLog(/* kext */ NULL,
- kOSKextLogStepLevel |
- kOSKextLogLoadFlag,
- "Loading security extension %s.", bundleID->getCStringNoCopy());
- OSKext::loadKextWithIdentifier(bundleID->getCStringNoCopy(),
- /* allowDefer */ false);
- }
- }
-
-finish:
- return;
-}
-
-/*********************************************************************
-* We used to require that all listed kernel components load, but
-* nowadays we can get them from userland so we only try to load the
-* ones we have. If an error occurs later, such is life.
-*
-* Note that we look the kexts up first, so we can avoid spurious
-* (in this context, anyhow) log messages about kexts not being found.
-*
-* xxx - do we even need to do this any more? Check if the kernel
-* xxx - compoonents just load in the regular paths
-*********************************************************************/
-OSReturn
-KLDBootstrap::loadKernelComponentKexts(void)
-{
- OSReturn result = kOSReturnSuccess;// optimistic
- OSSharedPtr<OSKext> theKext;
- const char ** kextIDPtr = NULL; // do not release
-
- for (kextIDPtr = &sKernelComponentNames[0]; *kextIDPtr; kextIDPtr++) {
- theKext = OSKext::lookupKextWithIdentifier(*kextIDPtr);
-
- if (theKext) {
- if (kOSReturnSuccess != OSKext::loadKextWithIdentifier(
- *kextIDPtr, /* allowDefer */ false)) {
- // xxx - check KextBookkeeping, might be redundant
- OSKextLog(/* kext */ NULL,
- kOSKextLogErrorLevel |
- kOSKextLogDirectoryScanFlag | kOSKextLogKextBookkeepingFlag,
- "Failed to initialize kernel component %s.", *kextIDPtr);
- result = kOSReturnError;
- }
- }
- }
-
- return result;
-}
-
-/*********************************************************************
-* Ensure that Kernel External Components are loaded early in boot,
-* before other kext personalities get sent to the IOCatalogue. These
-* kexts are treated specially because they may provide the implementation
-* for kernel-vended KPI, so they must register themselves before
-* general purpose IOKit probing begins.
-*********************************************************************/
-
-#define COM_APPLE_KEC "com.apple.kec."
-
-void
-KLDBootstrap::loadKernelExternalComponents(void)
-{
- OSSharedPtr<OSDictionary> extensionsDict;
- OSSharedPtr<OSCollectionIterator> keyIterator;
- OSString * bundleID = NULL;// don't release
- OSKext * theKext = NULL;// don't release
- OSBoolean * isKernelExternalComponent = NULL;// don't release
-
- OSKextLog(/* kext */ NULL,
- kOSKextLogStepLevel |
- kOSKextLogLoadFlag,
- "Loading Kernel External Components.");
-
- extensionsDict = OSKext::copyKexts();
- if (!extensionsDict) {
- return;
- }
-
- keyIterator = OSCollectionIterator::withCollection(extensionsDict.get());
- if (!keyIterator) {
- OSKextLog(/* kext */ NULL,
- kOSKextLogErrorLevel |
- kOSKextLogGeneralFlag,
- "Failed to allocate iterator for Kernel External Components.");
- goto finish;
- }
-
- while ((bundleID = OSDynamicCast(OSString, keyIterator->getNextObject()))) {
- const char * bundle_id = bundleID->getCStringNoCopy();
-
- /* Skip extensions whose bundle IDs don't start with "com.apple.kec.".
- */
- if (!bundle_id ||
- (strncmp(bundle_id, COM_APPLE_KEC, CONST_STRLEN(COM_APPLE_KEC)) != 0)) {
- continue;
- }
-
- theKext = OSDynamicCast(OSKext, extensionsDict->getObject(bundleID));
- if (!theKext) {
- continue;
- }
-
- isKernelExternalComponent = OSDynamicCast(OSBoolean,
- theKext->getPropertyForHostArch(kAppleKernelExternalComponentKey));
- if (isKernelExternalComponent && isKernelExternalComponent->isTrue()) {
- OSKextLog(/* kext */ NULL,
- kOSKextLogStepLevel |
- kOSKextLogLoadFlag,
- "Loading kernel external component %s.", bundleID->getCStringNoCopy());
- OSKext::loadKextWithIdentifier(bundleID->getCStringNoCopy(),
- /* allowDefer */ false);
- }
- }
-
-finish:
- return;
-}
-
-/*********************************************************************
-*********************************************************************/
-void
-KLDBootstrap::readBuiltinPersonalities(void)
-{
- OSSharedPtr<OSObject> parsedXML;
- OSArray * builtinExtensions = NULL;// do not release
- OSSharedPtr<OSArray> allPersonalities;
- OSSharedPtr<OSString> errorString;
- kernel_section_t * infosect = NULL;// do not free
- OSSharedPtr<OSCollectionIterator> personalitiesIterator;
- unsigned int count, i;
-
- OSKextLog(/* kext */ NULL,
- kOSKextLogStepLevel |
- kOSKextLogLoadFlag,
- "Reading built-in kernel personalities for I/O Kit drivers.");
-
- /* Look in the __BUILTIN __info segment for an array of Info.plist
- * entries. For each one, extract the personalities dictionary, add
- * it to our array, then push them all (without matching) to
- * the IOCatalogue. This can be used to augment the personalities
- * in gIOKernelConfigTables, especially when linking entire kexts into
- * the mach_kernel image.
- */
- infosect = getsectbyname("__BUILTIN", "__info");
- if (!infosect) {
- // this isn't fatal
- goto finish;
- }
-
- parsedXML = OSUnserializeXML((const char *) (uintptr_t)infosect->addr,
- errorString);
- if (parsedXML) {
- builtinExtensions = OSDynamicCast(OSArray, parsedXML.get());
- }
- if (!builtinExtensions) {
- const char * errorCString = "(unknown error)";
-
- if (errorString && errorString->getCStringNoCopy()) {
- errorCString = errorString->getCStringNoCopy();
- } else if (parsedXML) {
- errorCString = "not an array";
- }
- OSKextLog(/* kext */ NULL,
- kOSKextLogErrorLevel |
- kOSKextLogLoadFlag,
- "Error unserializing built-in personalities: %s.", errorCString);
- goto finish;
- }
-
- // estimate 3 personalities per Info.plist/kext
- count = builtinExtensions->getCount();
- allPersonalities = OSArray::withCapacity(count * 3);
-
- for (i = 0; i < count; i++) {
- OSDictionary * infoDict = NULL;// do not release
- OSString * moduleName = NULL;// do not release
- OSDictionary * personalities;// do not release
- OSString * personalityName;// do not release
-
- infoDict = OSDynamicCast(OSDictionary,
- builtinExtensions->getObject(i));
- if (!infoDict) {
- continue;
- }
-
- moduleName = OSDynamicCast(OSString,
- infoDict->getObject(kCFBundleIdentifierKey));
- if (!moduleName) {
- continue;
- }
-
- OSKextLog(/* kext */ NULL,
- kOSKextLogStepLevel |
- kOSKextLogLoadFlag,
- "Adding personalities for built-in driver %s:",
- moduleName->getCStringNoCopy());
-
- personalities = OSDynamicCast(OSDictionary,
- infoDict->getObject("IOKitPersonalities"));
- if (!personalities) {
- continue;
- }
-
- personalitiesIterator = OSCollectionIterator::withCollection(personalities);
- if (!personalitiesIterator) {
- continue; // xxx - well really, what can we do? should we panic?
- }
-
- while ((personalityName = OSDynamicCast(OSString,
- personalitiesIterator->getNextObject()))) {
- OSDictionary * personality = OSDynamicCast(OSDictionary,
- personalities->getObject(personalityName));
-
- OSKextLog(/* kext */ NULL,
- kOSKextLogDetailLevel |
- kOSKextLogLoadFlag,
- "Adding built-in driver personality %s.",
- personalityName->getCStringNoCopy());
-
- if (personality && !personality->getObject(kCFBundleIdentifierKey)) {
- personality->setObject(kCFBundleIdentifierKey, moduleName);
- }
- allPersonalities->setObject(personality);
- }
- }
-
- gIOCatalogue->addDrivers(allPersonalities.get(), false);
-
-finish:
- return;
-}
-
-#if PRAGMA_MARK
-#pragma mark Bootstrap Functions
-#endif
-/*********************************************************************
-* Bootstrap Functions
-*********************************************************************/
-static void
-bootstrapRecordStartupExtensions(void)
-{
- sBootstrapObject.readStartupExtensions();
- return;
-}
-
-static void
-bootstrapLoadSecurityExtensions(void)
-{
- sBootstrapObject.loadSecurityExtensions();
- return;
-}
-