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--- xnu/xnu-1228.9.59/libsa/kext.cpp
+++ xnu/xnu-792/libsa/kext.cpp
@@ -1,38 +1,24 @@
/*
- * Copyright (c) 2000-2007 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.
+ * 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.
*
- * 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
+ * This 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, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- * Please see the License for the specific language governing rights and
- * limitations under the License.
+ * FITNESS FOR A PARTICULAR PURPOSE 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@
*/
-
-/*
- * 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 <libkern/c++/OSContainers.h>
#include <IOKit/IOCatalogue.h>
#include <IOKit/IOLib.h>
@@ -74,13 +60,9 @@
extern kern_return_t kmod_retain(kmod_t id);
extern kern_return_t kmod_release(kmod_t id);
-extern Boolean kmod_load_request(const char * moduleName, Boolean make_request);
+extern void flush_dcache(vm_offset_t addr, unsigned cnt, int phys);
+extern void invalidate_icache(vm_offset_t addr, unsigned cnt, int phys);
};
-
-extern kmod_args_t
-get_module_data(OSDictionary * kextPlist, mach_msg_type_number_t * datalen);
-
-extern struct mac_module_data *osdict_encode(OSDictionary *dict);
#define DEBUG
#ifdef DEBUG
@@ -92,11 +74,6 @@
#define VTYELLOW
#define VTRESET
#endif /* DEBUG */
-
-
-#define KERNEL_PREFIX "com.apple.kernel"
-#define KPI_PREFIX "com.apple.kpi"
-
/*********************************************************************
*
@@ -167,7 +144,7 @@
*caller_owns_code = false;
*code = (unsigned char *)kld_file_getaddr(bundleid,
- (unsigned long *)&code_size_local);
+ (long *)&code_size_local);
if (*code) {
if (code_size) {
*code_size = code_size_local;
@@ -189,6 +166,7 @@
if (!uncompressModule(compressedCode, &driverCode)) {
IOLog("extension \"%s\": couldn't uncompress code\n",
bundleid);
+ LOG_DELAY(1);
result = false;
goto finish;
}
@@ -289,7 +267,7 @@
OSData * compressedCode = 0; // don't release
if (is_kernel) {
- *is_kernel = 0;
+ *is_kernel = false;
}
/* Get the dictionary of startup extensions.
@@ -330,7 +308,7 @@
extPlist->getObject("OSKernelResource"));
if (isKernelResourceObj && isKernelResourceObj->isTrue()) {
if (is_kernel) {
- *is_kernel = 1;
+ *is_kernel = true;
}
}
@@ -338,10 +316,8 @@
compressedCode = OSDynamicCast(OSData,
extDict->getObject("compressedCode"));
- /* A kernel component that has code represents a KPI.
- */
if ((driverCode || compressedCode) && is_kernel && *is_kernel) {
- *is_kernel = 2;
+ *is_kernel = 2;
}
if (!driverCode && !compressedCode && !isKernelResourceObj) {
@@ -357,20 +333,17 @@
/*********************************************************************
*********************************************************************/
static bool
-addDependenciesForKext(OSDictionary * kextPlist,
- OSArray * dependencyList,
+figureDependenciesForKext(OSDictionary * kextPlist,
+ OSDictionary * dependencies,
OSString * trueParent,
Boolean skipKernelDependencies)
{
bool result = true;
bool hasDirectKernelDependency = false;
- bool hasKernelStyleDependency = false;
- bool hasKPIStyleDependency = false;
OSString * kextName = 0; // don't release
OSDictionary * libraries = 0; // don't release
OSCollectionIterator * keyIterator = 0; // must release
OSString * libraryName = 0; // don't release
- OSString * dependentName = 0; // don't release
kextName = OSDynamicCast(OSString,
kextPlist->getObject("CFBundleIdentifier"));
@@ -393,8 +366,6 @@
result = false;
goto finish;
}
-
- dependentName = trueParent ? trueParent : kextName;
while ( (libraryName = OSDynamicCast(OSString,
keyIterator->getNextObject())) ) {
@@ -412,60 +383,24 @@
} else {
char is_kernel_component;
- if (!kextIsDependency(libraryName->getCStringNoCopy(),
- &is_kernel_component)) {
-
- is_kernel_component = 0;
- }
+ if (!kextIsDependency(libraryName->getCStringNoCopy(), &is_kernel_component))
+ is_kernel_component = false;
if (!skipKernelDependencies || !is_kernel_component) {
- dependencyList->setObject(dependentName);
- dependencyList->setObject(libraryName);
+ dependencies->setObject(libraryName,
+ trueParent ? trueParent : kextName);
}
if (!hasDirectKernelDependency && is_kernel_component) {
hasDirectKernelDependency = true;
}
-
- /* We already know from the kextIsDependency() call whether
- * the dependency *itself* is kernel- or KPI-style, but since
- * the declaration semantic is by bundle ID, we check that here
- * instead.
- */
- if (strncmp(libraryName->getCStringNoCopy(),
- KERNEL_PREFIX, strlen(KERNEL_PREFIX)) == 0) {
-
- hasKernelStyleDependency = true;
-
- } else if (strncmp(libraryName->getCStringNoCopy(),
- KPI_PREFIX, strlen(KPI_PREFIX)) == 0) {
-
- hasKPIStyleDependency = true;
- }
- }
- }
-
+ }
+ }
if (!hasDirectKernelDependency) {
- const OSSymbol * kernelName = 0;
-
/* a kext without any kernel dependency is assumed dependent on 6.0 */
- dependencyList->setObject(dependentName);
-
- kernelName = OSSymbol::withCString("com.apple.kernel.libkern");
- if (!kernelName) {
- // XXX: Add log message
- result = false;
- goto finish;
- }
- dependencyList->setObject(kernelName);
- kernelName->release();
-
- IOLog("Extension \"%s\" has no explicit kernel dependency; using version 6.0.\n",
- kextName->getCStringNoCopy());
-
- } else if (hasKernelStyleDependency && hasKPIStyleDependency) {
- IOLog("Extension \"%s\" has immediate dependencies "
- "on both com.apple.kernel and com.apple.kpi components; use only one style.\n",
- kextName->getCStringNoCopy());
+ dependencies->setObject("com.apple.kernel.libkern",
+ trueParent ? trueParent : kextName);
+ IOLog("Extension \"%s\" has no kernel dependency.\n",
+ kextName->getCStringNoCopy());
}
finish:
@@ -511,25 +446,24 @@
{
bool result = true;
OSDictionary * kextPlist = 0; // don't release
- unsigned int index = 0;
- OSArray * dependencyList = 0; // must release
+ OSDictionary * workingDependencies = 0; // must release
+ OSDictionary * pendingDependencies = 0; // must release
+ OSDictionary * swapDict = 0; // don't release
+ OSString * dependentName = 0; // don't release
+ const char * dependent_name = 0; // don't free
+ OSString * libraryName = 0; // don't release
+ const char * library_name = 0; // don't free
+ OSCollectionIterator * dependencyIterator = 0; // must release
unsigned char * code = 0;
unsigned long code_length = 0;
bool code_is_kmem = false;
char * kmod_vers = 0; // from plist, don't free
- char is_kernel_component = 0;
+ char is_kernel_component = false;
dgraph_entry_t * dgraph_entry = 0; // don't free
dgraph_entry_t * dgraph_dependency = 0; // don't free
+ unsigned int graph_depth = 0;
bool kext_is_dependency = true;
-#if CONFIG_MACF_KEXT
- kmod_args_t user_data = 0;
- mach_msg_type_number_t user_data_length;
-#endif
-
- /*****
- * Set up the root kmod.
- */
if (!getKext(kmod_name, &kextPlist, &code, &code_length,
&code_is_kmem)) {
IOLog("can't find extension %s\n", kmod_name);
@@ -549,16 +483,8 @@
goto finish;
}
-#if CONFIG_MACF_KEXT
- // check kext for module data in the plist
- user_data = get_module_data(kextPlist, &user_data_length);
-#endif
-
dgraph_entry = dgraph_add_dependent(dgraph, kmod_name,
code, code_length, code_is_kmem,
-#if CONFIG_MACF_KEXT
- user_data, user_data_length,
-#endif
kmod_name, kmod_vers,
0 /* load_address not yet known */, is_kernel_component);
if (!dgraph_entry) {
@@ -569,7 +495,8 @@
}
// pass ownership of code to kld patcher
- if (code) {
+ if (code)
+ {
if (kload_map_entry(dgraph_entry) != kload_error_none) {
IOLog("can't map %s in preparation for loading\n", kmod_name);
result = false;
@@ -582,78 +509,95 @@
code_length = 0;
code_is_kmem = false;
- /*****
- * Now handle all the dependencies.
- */
- dependencyList = OSArray::withCapacity(5);
- if (!dependencyList) {
+ workingDependencies = OSDictionary::withCapacity(5);
+ if (!workingDependencies) {
IOLog("memory allocation failure\n");
result = false;
goto finish;
}
- index = 0;
- if (!addDependenciesForKext(kextPlist, dependencyList, NULL, false)) {
+ pendingDependencies = OSDictionary::withCapacity(5);
+ if (!pendingDependencies) {
+ IOLog("memory allocation failure\n");
+ result = false;
+ goto finish;
+ }
+
+ if (!figureDependenciesForKext(kextPlist, workingDependencies, NULL, false)) {
IOLog("can't determine immediate dependencies for extension %s\n",
kmod_name);
result = false;
goto finish;
}
- /* IMPORTANT: loop condition gets list count every time through, as the
- * array CAN change each iteration.
- */
- for (index = 0; index < dependencyList->getCount(); index += 2) {
- OSString * dependentName = 0;
- OSString * libraryName = 0;
- const char * dependent_name = 0;
- const char * library_name = 0;
-
- /* 255 is an arbitrary limit. Multiplied by 2 because the dependency
- * list is stocked with pairs (dependent -> dependency).
- */
- if (index > (2 * 255)) {
+ graph_depth = 0;
+ while (workingDependencies->getCount()) {
+ if (graph_depth > 255) {
IOLog("extension dependency graph ridiculously long, indicating a loop\n");
result = false;
goto finish;
}
- dependentName = OSDynamicCast(OSString,
- dependencyList->getObject(index));
- libraryName = OSDynamicCast(OSString,
- dependencyList->getObject(index + 1));
-
- if (!dependentName || !libraryName) {
- IOLog("malformed dependency list\n");
+ if (dependencyIterator) {
+ dependencyIterator->release();
+ dependencyIterator = 0;
+ }
+
+ dependencyIterator = OSCollectionIterator::withCollection(
+ workingDependencies);
+ if (!dependencyIterator) {
+ IOLog("memory allocation failure\n");
result = false;
goto finish;
}
- dependent_name = dependentName->getCStringNoCopy();
- library_name = libraryName->getCStringNoCopy();
-
- if (!getKext(library_name, &kextPlist, NULL, NULL, NULL)) {
-
- IOLog("can't find extension %s\n", library_name);
- result = false;
- goto finish;
- }
-
- OSString * string = OSDynamicCast(OSString,
- kextPlist->getObject("OSBundleSharedExecutableIdentifier"));
- if (string) {
- library_name = string->getCStringNoCopy();
+ while ( (libraryName =
+ OSDynamicCast(OSString, dependencyIterator->getNextObject())) ) {
+
+ library_name = libraryName->getCStringNoCopy();
+
+ dependentName = OSDynamicCast(OSString,
+ workingDependencies->getObject(libraryName));
+
+ dependent_name = dependentName->getCStringNoCopy();
+
if (!getKext(library_name, &kextPlist, NULL, NULL, NULL)) {
IOLog("can't find extension %s\n", library_name);
result = false;
goto finish;
}
- }
-
- kext_is_dependency = kextIsDependency(library_name,
- &is_kernel_component);
-
- if (kext_is_dependency) {
+
+ OSString * string;
+ if ((string = OSDynamicCast(OSString,
+ kextPlist->getObject("OSBundleSharedExecutableIdentifier"))))
+ {
+ library_name = string->getCStringNoCopy();
+ if (!getKext(library_name, &kextPlist, NULL, NULL, NULL)) {
+ IOLog("can't find extension %s\n", library_name);
+ result = false;
+ goto finish;
+ }
+ }
+
+ kext_is_dependency = kextIsDependency(library_name,
+ &is_kernel_component);
+
+ if (!kext_is_dependency) {
+
+ /* For binaryless kexts, add a new pending dependency from the
+ * original dependent onto the dependencies of the current,
+ * binaryless, dependency.
+ */
+ if (!figureDependenciesForKext(kextPlist, pendingDependencies,
+ dependentName, true)) {
+
+ IOLog("can't determine immediate dependencies for extension %s\n",
+ library_name);
+ result = false;
+ goto finish;
+ }
+ continue;
+ } else {
dgraph_entry = dgraph_find_dependent(dgraph, dependent_name);
if (!dgraph_entry) {
IOLog("internal error with dependency graph\n");
@@ -678,16 +622,8 @@
goto finish;
}
-#if CONFIG_MACF_KEXT
- // check kext for module data in the plist
- // XXX - is this really needed?
- user_data = get_module_data(kextPlist, &user_data_length);
-#endif
dgraph_dependency = dgraph_add_dependency(dgraph, dgraph_entry,
library_name, code, code_length, code_is_kmem,
-#if CONFIG_MACF_KEXT
- user_data, user_data_length,
-#endif
library_name, kmod_vers,
0 /* load_address not yet known */, is_kernel_component);
@@ -716,8 +652,8 @@
/* Now put the library's dependencies onto the pending set.
*/
- if (!addDependenciesForKext(kextPlist, dependencyList,
- kext_is_dependency ? NULL : dependentName, !kext_is_dependency)) {
+ if (!figureDependenciesForKext(kextPlist, pendingDependencies,
+ NULL, false)) {
IOLog("can't determine immediate dependencies for extension %s\n",
library_name);
@@ -726,18 +662,23 @@
}
}
+ dependencyIterator->release();
+ dependencyIterator = 0;
+
+ workingDependencies->flushCollection();
+ swapDict = workingDependencies;
+ workingDependencies = pendingDependencies;
+ pendingDependencies = swapDict;
+ graph_depth++;
+ }
+
finish:
if (code && code_is_kmem) {
kmem_free(kernel_map, (unsigned int)code, code_length);
}
- if (dependencyList) dependencyList->release();
-
-#if CONFIG_MACF_KEXT
- if (user_data && !result) {
- vm_map_copy_discard((vm_map_copy_t)user_data);
- }
-#endif
-
+ if (workingDependencies) workingDependencies->release();
+ if (pendingDependencies) pendingDependencies->release();
+ if (dependencyIterator) dependencyIterator->release();
return result;
}
@@ -765,7 +706,7 @@
/* See if the kmod is already loaded.
*/
if ((kmod_info = kmod_lookupbyname_locked(kmod_name))) {
- kfree(kmod_info, sizeof(kmod_info_t));
+ kfree((vm_offset_t) kmod_info, sizeof(kmod_info_t));
return KERN_SUCCESS;
}
@@ -819,71 +760,3 @@
}
return result;
}
-
-#define COM_APPLE "com.apple."
-
-__private_extern__ void
-load_security_extensions (void)
-{
- OSDictionary * extensionsDict = NULL; // don't release
- OSCollectionIterator* keyIterator = NULL; // must release
- OSString * key = NULL; // don't release
- OSDictionary * extDict; // don't release
- OSDictionary * extPlist; // don't release
- OSBoolean * isSec = 0; // don't release
- Boolean ret;
-
- extensionsDict = getStartupExtensions();
- if (!extensionsDict) {
- IOLog("startup extensions dictionary is missing\n");
- LOG_DELAY(1);
- return;
- }
-
- keyIterator = OSCollectionIterator::withCollection(extensionsDict);
- if (!keyIterator) {
- IOLog("Error: Failed to allocate iterator for extensions.\n");
- LOG_DELAY(1);
- return;
- }
-
- while ((key = OSDynamicCast(OSString, keyIterator->getNextObject()))) {
-
- const char * bundle_id = key->getCStringNoCopy();
-
- /* Skip extensions whose bundle IDs don't start with "com.apple.".
- */
- if (!bundle_id || (strncmp(bundle_id, COM_APPLE, strlen(COM_APPLE)) != 0)) {
- continue;
- }
-
- extDict = OSDynamicCast(OSDictionary, extensionsDict->getObject(key));
- if (!extDict) {
- IOLog("extension \"%s\" cannot be found\n",
- key->getCStringNoCopy());
- continue;
- }
-
- extPlist = OSDynamicCast(OSDictionary, extDict->getObject("plist"));
- if (!extPlist) {
- IOLog("extension \"%s\" has no info dictionary\n",
- key->getCStringNoCopy());
- continue;
- }
-
- isSec = OSDynamicCast(OSBoolean,
- extPlist->getObject("AppleSecurityExtension"));
- if (isSec && isSec->isTrue()) {
- printf("Loading security extension %s\n", key->getCStringNoCopy());
- ret = kmod_load_request(key->getCStringNoCopy(), false);
- if (!ret) {
- load_kernel_extension((char *)key->getCStringNoCopy());
- }
- }
- }
-
- if (keyIterator)
- keyIterator->release();
-
- return;
-}