X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/5d5c5d0d5b79ade9a973d55186ffda2638ba2b6e..8f6c56a50524aa785f7e596d52dddfb331e18961:/libsa/kext.cpp
diff --git a/libsa/kext.cpp b/libsa/kext.cpp
index 538b010d0..3a4556454 100644
--- a/libsa/kext.cpp
+++ b/libsa/kext.cpp
@@ -1,31 +1,29 @@
/*
* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
*
- * @APPLE_LICENSE_OSREFERENCE_HEADER_START@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
- * This file contains Original Code and/or Modifications of Original Code
- * as defined in and that are subject to the Apple Public Source License
- * Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. The rights granted to you under the
- * License may not be used to create, or enable the creation or
- * redistribution of, unlawful or unlicensed copies of an Apple operating
- * system, or to circumvent, violate, or enable the circumvention or
- * violation of, any terms of an Apple operating system software license
- * agreement.
- *
- * Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
- *
- * The Original Code and all software distributed under the License are
- * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- * Please see the License for the specific language governing rights and
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ *
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * 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_OSREFERENCE_HEADER_END@
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
#include <libkern/c++/OSContainers.h>
#include <IOKit/IOCatalogue.h>
@@ -174,6 +172,7 @@ bool getKext(
if (!uncompressModule(compressedCode, &driverCode)) {
IOLog("extension \"%s\": couldn't uncompress code\n",
bundleid);
+ LOG_DELAY(1);
result = false;
goto finish;
}
@@ -324,7 +323,7 @@ bool kextIsDependency(const char * kext_name, char * is_kernel) {
extDict->getObject("compressedCode"));
if ((driverCode || compressedCode) && is_kernel && *is_kernel) {
- *is_kernel = 2;
+ *is_kernel = 2;
}
if (!driverCode && !compressedCode && !isKernelResourceObj) {
@@ -340,8 +339,8 @@ finish:
/*********************************************************************
*********************************************************************/
static bool
-addDependenciesForKext(OSDictionary * kextPlist,
- OSArray * dependencyList,
+figureDependenciesForKext(OSDictionary * kextPlist,
+ OSDictionary * dependencies,
OSString * trueParent,
Boolean skipKernelDependencies)
{
@@ -351,7 +350,6 @@ addDependenciesForKext(OSDictionary * kextPlist,
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"));
@@ -375,8 +373,6 @@ addDependenciesForKext(OSDictionary * kextPlist,
goto finish;
}
- dependentName = trueParent ? trueParent : kextName;
-
while ( (libraryName = OSDynamicCast(OSString,
keyIterator->getNextObject())) ) {
@@ -393,15 +389,12 @@ addDependenciesForKext(OSDictionary * kextPlist,
} else {
char is_kernel_component;
- if (!kextIsDependency(libraryName->getCStringNoCopy(),
- &is_kernel_component)) {
-
+ 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;
@@ -409,22 +402,11 @@ addDependenciesForKext(OSDictionary * kextPlist,
}
}
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();
-
+ dependencies->setObject("com.apple.kernel.libkern",
+ trueParent ? trueParent : kextName);
IOLog("Extension \"%s\" has no kernel dependency.\n",
- kextName->getCStringNoCopy());
+ kextName->getCStringNoCopy());
}
finish:
@@ -470,8 +452,14 @@ bool add_dependencies_for_kmod(const char * kmod_name, dgraph_t * dgraph)
{
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;
@@ -479,11 +467,9 @@ bool add_dependencies_for_kmod(const char * kmod_name, dgraph_t * dgraph)
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;
- /*****
- * 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);
@@ -515,7 +501,8 @@ bool add_dependencies_for_kmod(const char * kmod_name, dgraph_t * dgraph)
}
// 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;
@@ -528,78 +515,95 @@ bool add_dependencies_for_kmod(const char * kmod_name, dgraph_t * dgraph)
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 (dependencyIterator) {
+ dependencyIterator->release();
+ dependencyIterator = 0;
+ }
- if (!dependentName || !libraryName) {
- IOLog("malformed dependency list\n");
+ dependencyIterator = OSCollectionIterator::withCollection(
+ workingDependencies);
+ if (!dependencyIterator) {
+ IOLog("memory allocation failure\n");
result = false;
goto finish;
}
- dependent_name = dependentName->getCStringNoCopy();
- library_name = libraryName->getCStringNoCopy();
+ while ( (libraryName =
+ OSDynamicCast(OSString, dependencyIterator->getNextObject())) ) {
- if (!getKext(library_name, &kextPlist, NULL, NULL, NULL)) {
+ library_name = libraryName->getCStringNoCopy();
- IOLog("can't find extension %s\n", library_name);
- result = false;
- goto finish;
- }
+ dependentName = OSDynamicCast(OSString,
+ workingDependencies->getObject(libraryName));
+
+ dependent_name = dependentName->getCStringNoCopy();
- OSString * string = OSDynamicCast(OSString,
- kextPlist->getObject("OSBundleSharedExecutableIdentifier"));
- if (string) {
- 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);
+ 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)) {
- if (kext_is_dependency) {
+ 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");
@@ -654,8 +658,8 @@ bool add_dependencies_for_kmod(const char * kmod_name, dgraph_t * dgraph)
/* 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);
@@ -664,12 +668,23 @@ bool add_dependencies_for_kmod(const char * kmod_name, dgraph_t * dgraph)
}
}
+ 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 (workingDependencies) workingDependencies->release();
+ if (pendingDependencies) pendingDependencies->release();
+ if (dependencyIterator) dependencyIterator->release();
return result;
}
@@ -697,7 +712,7 @@ kern_return_t load_kernel_extension(char * kmod_name)
/* 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;
}