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--- xnu/xnu-344.49/libsa/kmod.cpp
+++ xnu/xnu-124.7/libsa/kmod.cpp
@@ -3,22 +3,19 @@
*
* @APPLE_LICENSE_HEADER_START@
*
- * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved.
+ * 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. 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_LICENSE_HEADER_END@
*/
@@ -40,10 +37,13 @@
#include <mach_loader.h>
};
-#include "kld_patch.h"
-
extern "C" {
+extern load_return_t fatfile_getarch(
+ void * vp, // normally a (struct vnode *)
+ vm_offset_t data_ptr,
+ struct fat_arch * archret);
+
extern kern_return_t
kmod_create_internal(
kmod_info_t *info,
@@ -67,108 +67,14 @@
};
+IOLock * kld_lock;
+
+
#define LOG_DELAY()
-#define VTYELLOW "\033[33m"
-#define VTRESET "\033[0m"
-
-
-
-
-/*********************************************************************
-*
-*********************************************************************/
-bool verifyCompatibility(OSString * extName, OSString * requiredVersion)
-{
- OSDictionary * extensionsDict; // don't release
- OSDictionary * extDict; // don't release
- OSDictionary * extPlist; // don't release
- OSString * extVersion; // don't release
- OSString * extCompatVersion; // don't release
- UInt32 ext_version;
- UInt32 ext_compat_version;
- UInt32 required_version;
-
- /* Get the dictionary of startup extensions.
- * This is keyed by module name.
- */
- extensionsDict = getStartupExtensions();
- if (!extensionsDict) {
- IOLog("verifyCompatibility(): No extensions dictionary.\n");
- return false;
- }
-
- /* Get the requested extension's dictionary entry and its property
- * list, containing module dependencies.
- */
- extDict = OSDynamicCast(OSDictionary,
- extensionsDict->getObject(extName));
-
- if (!extDict) {
- IOLog("verifyCompatibility(): "
- "Extension \"%s\" cannot be found.\n",
- extName->getCStringNoCopy());
- return false;
- }
-
- extPlist = OSDynamicCast(OSDictionary, extDict->getObject("plist"));
- if (!extPlist) {
- IOLog("verifyCompatibility(): "
- "Extension \"%s\" has no property list.\n",
- extName->getCStringNoCopy());
- return false;
- }
-
-
- extVersion = OSDynamicCast(OSString,
- extPlist->getObject("CFBundleVersion"));
- if (!extVersion) {
- IOLog("verifyCompatibility(): "
- "Extension \"%s\" has no \"CFBundleVersion\" property.\n",
- extName->getCStringNoCopy());
- return false;
- }
-
- extCompatVersion = OSDynamicCast(OSString,
- extPlist->getObject("OSBundleCompatibleVersion"));
- if (!extCompatVersion) {
- IOLog("verifyCompatibility(): "
- "Extension \"%s\" has no \"OSBundleCompatibleVersion\" property.\n",
- extName->getCStringNoCopy());
- return false;
- }
-
- if (!VERS_parse_string(requiredVersion->getCStringNoCopy(),
- &required_version)) {
- IOLog("verifyCompatibility(): "
- "Can't parse required version \"%s\" of dependency %s.\n",
- requiredVersion->getCStringNoCopy(),
- extName->getCStringNoCopy());
- return false;
- }
- if (!VERS_parse_string(extVersion->getCStringNoCopy(),
- &ext_version)) {
- IOLog("verifyCompatibility(): "
- "Can't parse version \"%s\" of dependency %s.\n",
- extVersion->getCStringNoCopy(),
- extName->getCStringNoCopy());
- return false;
- }
- if (!VERS_parse_string(extCompatVersion->getCStringNoCopy(),
- &ext_compat_version)) {
- IOLog("verifyCompatibility(): "
- "Can't parse compatible version \"%s\" of dependency %s.\n",
- extCompatVersion->getCStringNoCopy(),
- extName->getCStringNoCopy());
- return false;
- }
-
- if (required_version > ext_version || required_version < ext_compat_version) {
- return false;
- }
-
- return true;
-}
+#define VTYELLOW "\033[33m"
+#define VTRESET "\033[0m"
+
/*********************************************************************
* This function builds a uniqued, in-order list of modules that need
@@ -176,7 +82,7 @@
* list ends with kmod_name itself.
*********************************************************************/
static
-OSArray * getDependencyListForKmod(const char * kmod_name) {
+OSArray * getDependencyListForKmod(char * kmod_name) {
int error = 0;
@@ -185,9 +91,6 @@
OSDictionary * extPlist; // don't release
OSString * extName; // don't release
OSArray * dependencyList = NULL; // return value, caller releases
- OSBoolean * isKernelResourceObj = 0; // don't release
- bool isKernelResource = false;
- bool declaresExecutable = false;
unsigned int i;
/* These are used to remove duplicates from the dependency list.
@@ -258,30 +161,6 @@
goto finish;
}
- /* A kext that's not a kernel extension and declares no executable has nothing
- * to load, so just return an empty array.
- */
- isKernelResourceObj = OSDynamicCast(OSBoolean,
- extPlist->getObject("OSKernelResource"));
- if (isKernelResourceObj && isKernelResourceObj->isTrue()) {
- isKernelResource = true;
- } else {
- isKernelResource = false;
- }
-
- if (extPlist->getObject("CFBundleExecutable")) {
- declaresExecutable = true;
- } else {
- declaresExecutable = false;
- }
-
- if (!isKernelResource && !declaresExecutable) {
- error = 0;
- goto finish;
- }
-
- /* Okay, let's get started.
- */
dependencyList->setObject(extName);
@@ -340,9 +219,9 @@
goto finish;
}
- curExtDepDict = OSDynamicCast(OSDictionary,
- curExtPlist->getObject("OSBundleLibraries"));
- if (curExtDepDict) {
+ curExtDepDict = OSDynamicCast(OSDictionary,
+ curExtPlist->getObject("OSBundleLibraries"));
+ if (curExtDepDict) {
OSCollectionIterator * keyIterator =
OSCollectionIterator::withCollection(curExtDepDict);
@@ -358,41 +237,6 @@
OSDynamicCast(OSString,
keyIterator->getNextObject())) ) {
- OSString * requiredVersion = OSDynamicCast(OSString,
- curExtDepDict->getObject(curDepName));
-
- if (!verifyCompatibility(curDepName, requiredVersion)) {
- IOLog("getDependencyListForKmod(): "
- "Dependency %s of %s is not compatible or is unavailable.\n",
- curDepName->getCStringNoCopy(),
- curName->getCStringNoCopy());
- LOG_DELAY();
- error = 1;
- goto finish;
- }
-
- /* Don't add any entries that are not kernel resources and that declare no
- * executable. Such kexts have nothing to load and so don't belong in the
- * dependency list. Entries that are kernel resource *do* get added,
- * however, because such kexts get fake kmod entries for reference counting.
- */
- isKernelResourceObj = OSDynamicCast(OSBoolean,
- curExtPlist->getObject("OSKernelResource"));
- if (isKernelResourceObj && isKernelResourceObj->isTrue()) {
- isKernelResource = true;
- } else {
- isKernelResource = false;
- }
- if (curExtPlist->getObject("CFBundleExecutable")) {
- declaresExecutable = true;
- } else {
- declaresExecutable = false;
- }
-
- if (!isKernelResource && !declaresExecutable) {
- continue;
- }
-
dependencyList->setObject(curDepName);
}
@@ -448,6 +292,7 @@
}
+
finish:
if (originalList) {
@@ -469,6 +314,209 @@
/*********************************************************************
*********************************************************************/
+static bool verifyCompatibleVersions(OSArray * dependencyList) {
+ bool result = true;
+
+ OSString * requestedModuleName = NULL;
+
+ OSDictionary * extensionsDict = NULL;
+ int count, i;
+ OSString * curName = NULL;
+ OSDictionary * curExt = NULL;
+ OSDictionary * curExtPlist = NULL;
+
+ OSBoolean * isKernelResource = NULL;
+
+ OSDictionary * dependencies = NULL;
+ OSCollectionIterator * dependencyIterator = NULL; // must release
+ OSString * dependencyName = NULL;
+ OSString * curExtDependencyVersion = NULL;
+ UInt32 cur_ext_required_dependency_vers;
+
+ OSDictionary * dependency = NULL;
+ OSDictionary * dependencyPlist = NULL;
+
+ OSString * dependencyVersion = NULL;
+ OSString * dependencyCompatibleVersion = NULL;
+ UInt32 dependency_vers;
+ UInt32 dependency_compat_vers;
+
+
+ /* Get the dictionary of startup extensions.
+ * This is keyed by module name.
+ */
+ extensionsDict = getStartupExtensions();
+ if (!extensionsDict) {
+ IOLog("verifyCompatibleVersions(): No extensions dictionary.\n");
+ LOG_DELAY();
+ result = false;
+ goto finish;
+ }
+
+
+ count = dependencyList->getCount();
+ if (!count) {
+ IOLog("verifyCompatibleVersions(): "
+ "Invoked with no dependency list.\n");
+ LOG_DELAY();
+ result = false;
+ goto finish;
+ }
+
+ requestedModuleName = OSDynamicCast(OSString,
+ dependencyList->getObject(count - 1));
+
+ for (i = count - 1; i >= 0; i--) {
+
+ if (dependencyIterator) {
+ dependencyIterator->release();
+ dependencyIterator = NULL;
+ }
+
+ curName = OSDynamicCast(OSString, dependencyList->getObject(i));
+ if (!curName) {
+ IOLog("verifyCompatibleVersions(): Internal error (1).\n");
+ LOG_DELAY();
+ result = false;
+ goto finish;
+ }
+
+ curExt = OSDynamicCast(OSDictionary,
+ extensionsDict->getObject(curName));
+ if (!curExt) {
+ IOLog("verifyCompatibleVersions(): Internal error (2).\n");
+ LOG_DELAY();
+ result = false;
+ goto finish;
+ }
+
+ curExtPlist = OSDynamicCast(OSDictionary,
+ curExt->getObject("plist"));
+ if (!curExtPlist) {
+ IOLog("verifyCompatibleVersions(): Internal error (3).\n");
+ LOG_DELAY();
+ result = false;
+ goto finish;
+ }
+
+
+ /* In-kernel extensions don't need to check dependencies.
+ */
+ isKernelResource = OSDynamicCast(OSBoolean,
+ curExtPlist->getObject("OSKernelResource"));
+ if (isKernelResource && isKernelResource->isTrue()) {
+ continue;
+ }
+
+ dependencies = OSDynamicCast(OSDictionary,
+ curExtPlist->getObject("OSBundleLibraries"));
+ if (!dependencies || dependencies->getCount() < 1) {
+ IOLog(VTYELLOW "verifyCompatibleVersions(): Extension \"%s\" "
+ "declares no dependencies.\n" VTRESET,
+ curName->getCStringNoCopy());
+ LOG_DELAY();
+ result = false;
+ goto finish;
+ }
+
+ dependencyIterator =
+ OSCollectionIterator::withCollection(dependencies);
+ if (!curExtPlist) {
+ IOLog("verifyCompatibleVersions(): Internal error (4).\n");
+ LOG_DELAY();
+ result = false;
+ goto finish;
+ }
+
+ while ((dependencyName = OSDynamicCast(OSString,
+ dependencyIterator->getNextObject()))) {
+
+ curExtDependencyVersion = OSDynamicCast(OSString,
+ dependencies->getObject(dependencyName));
+ if (!curExtDependencyVersion) {
+ IOLog("verifyCompatibleVersions(): Internal error (5).\n");
+ LOG_DELAY();
+ result = false;
+ goto finish;
+ }
+
+ dependency = OSDynamicCast(OSDictionary,
+ extensionsDict->getObject(dependencyName));
+ if (!dependency) {
+ IOLog("verifyCompatibleVersions(): Internal error (6).\n");
+ LOG_DELAY();
+ result = false;
+ goto finish;
+ }
+
+ dependencyPlist = OSDynamicCast(OSDictionary,
+ dependency->getObject("plist"));
+ if (!dependencyPlist) {
+ IOLog("verifyCompatibleVersions(): Internal error (7).\n");
+ LOG_DELAY();
+ result = false;
+ goto finish;
+ }
+
+ dependencyVersion = OSDynamicCast(OSString,
+ dependencyPlist->getObject("CFBundleVersion"));
+ if (!curExtDependencyVersion) {
+ IOLog(VTYELLOW "Dependency extension \"%s\" doesn't declare a "
+ "version.\n" VTRESET,
+ dependencyName->getCStringNoCopy());
+ LOG_DELAY();
+ result = false;
+ goto finish;
+ }
+
+ dependencyCompatibleVersion = OSDynamicCast(OSString,
+ dependencyPlist->getObject("OSBundleCompatibleVersion"));
+ if (!dependencyCompatibleVersion) {
+ IOLog(VTYELLOW "Dependency extension \"%s\" doesn't declare a "
+ "compatible version.\n" VTRESET,
+ dependencyName->getCStringNoCopy());
+ LOG_DELAY();
+ result = false;
+ goto finish;
+ }
+
+IOLog("\033[33m %s (needs %s, compat-current is %s-%s).\n" VTRESET,
+ dependencyName->getCStringNoCopy(),
+ curExtDependencyVersion->getCStringNoCopy(),
+ dependencyCompatibleVersion->getCStringNoCopy(),
+ dependencyVersion->getCStringNoCopy());
+LOG_DELAY();
+
+ if (!VERS_parse_string(curExtDependencyVersion->getCStringNoCopy(),
+ &cur_ext_required_dependency_vers)) {
+ }
+ if (!VERS_parse_string(dependencyVersion->getCStringNoCopy(),
+ &dependency_vers)) {
+ }
+ if (!VERS_parse_string(dependencyCompatibleVersion->getCStringNoCopy(),
+ &dependency_compat_vers)) {
+ }
+
+ if (cur_ext_required_dependency_vers > dependency_vers ||
+ cur_ext_required_dependency_vers < dependency_compat_vers) {
+
+ IOLog(VTYELLOW "Cannot load extension \"%s\": dependencies "
+ "\"%s\" and \"%s\" are not of compatible versions.\n" VTRESET,
+ requestedModuleName->getCStringNoCopy(),
+ curName->getCStringNoCopy(),
+ dependencyName->getCStringNoCopy());
+ LOG_DELAY();
+ result = false;
+ goto finish;
+ }
+ }
+ }
+
+finish:
+ return result;
+}
+
+
/* Used in address_for_loaded_kmod.
*/
static kmod_info_t * g_current_kmod_info = NULL;
@@ -587,34 +635,35 @@
return link_load_address;
}
+
/*********************************************************************
* This function reads the startup extensions dictionary to get the
* address and length of the executable data for the requested kmod.
*********************************************************************/
static
-int map_and_patch(const char * kmod_name) {
-
- char *address;
-
- // Does the kld system already know about this kmod?
- address = (char *) kld_file_getaddr(kmod_name, NULL);
- if (address)
- return 1;
+int get_text_info_for_kmod(const char * kmod_name,
+ char ** text_address,
+ unsigned long * text_size) {
// None of these needs to be released.
OSDictionary * extensionsDict;
OSDictionary * kmodDict;
- OSData * compressedCode = 0;
-
- // Driver Code may need to be released
OSData * driverCode;
+
+ vm_offset_t kmod_address;
+ typedef union {
+ struct mach_header mach_header;
+ struct fat_header fat_header;
+ } kmod_header_composite;
+ kmod_header_composite * kmod_headers;
+
/* Get the requested kmod's info dictionary from the global
* startup extensions dictionary.
*/
extensionsDict = getStartupExtensions();
if (!extensionsDict) {
- IOLog("map_and_patch(): No extensions dictionary.\n");
+ IOLog("text_address_for_kmod(): No extensions dictionary.\n");
LOG_DELAY();
return 0;
}
@@ -622,104 +671,99 @@
kmodDict = OSDynamicCast(OSDictionary,
extensionsDict->getObject(kmod_name));
if (!kmodDict) {
- IOLog("map_and_patch(): "
+ IOLog("text_address_for_kmod(): "
"Extension \"%s\" cannot be found.\n", kmod_name);
LOG_DELAY();
return 0;
}
- Boolean ret = false;
-
driverCode = OSDynamicCast(OSData, kmodDict->getObject("code"));
- if (driverCode) {
- ret = kld_file_map(kmod_name,
- (unsigned char *) driverCode->getBytesNoCopy(),
- (size_t) driverCode->getLength(),
- /* isKmem */ false);
- }
- else { // May be an compressed extension
-
- // If we have a compressed segment the uncompressModule
- // will return a new OSData object that points to the kmem_alloced
- // memory. Note we don't take a reference to driverCode so later
- // when we release it we will actually free this driver. Ownership
- // of the kmem has been handed of to kld_file.
- compressedCode = OSDynamicCast(OSData,
- kmodDict->getObject("compressedCode"));
- if (!compressedCode) {
- IOLog("map_and_patch(): "
- "Extension \"%s\" has no \"code\" property.\n", kmod_name);
- LOG_DELAY();
- return 0;
- }
- if (!uncompressModule(compressedCode, &driverCode)) {
- IOLog("map_and_patch(): "
- "Extension \"%s\" Couldn't uncompress code.\n", kmod_name);
- LOG_DELAY();
- return 0;
- }
-
- unsigned char *driver = (unsigned char *) driverCode->getBytesNoCopy();
- size_t driverSize = driverCode->getLength();
-
- ret = kld_file_map(kmod_name, driver, driverSize, /* isKmem */ true);
- driverCode->release();
- if (!ret)
- kmem_free(kernel_map, (vm_address_t) driver, driverSize);
- }
-
- if (!ret) {
- IOLog("map_and_patch(): "
- "Extension \"%s\" Didn't successfully load.\n", kmod_name);
- LOG_DELAY();
- return 0;
- }
-
- ret = TRUE;
- if (!kld_file_patch_OSObjects(kmod_name)) {
- IOLog("map_and_patch(): "
- "Extension \"%s\" Error binding OSObjects.\n", kmod_name);
- LOG_DELAY();
-
- // RY: Instead of returning here, set the return value.
- // We still need to call kld_file_prepare_for_link because
- // we might have patched files outside of the driver. Don't
- // worry, it will know to ignore the damaged file
- ret = FALSE;
- }
-
- // Now repair any damage that the kld patcher may have done to the image
- kld_file_prepare_for_link();
-
- return ret;
+ if (!driverCode) {
+ IOLog("text_address_for_kmod(): "
+ "Extension \"%s\" has no \"code\" property.\n",
+ kmod_name);
+ LOG_DELAY();
+ return 0;
+ }
+
+ kmod_address = (vm_offset_t)driverCode->getBytesNoCopy();
+ kmod_headers = (kmod_header_composite *)kmod_address;
+
+ /* Now extract the appropriate code from the executable data.
+ */
+ if (kmod_headers->mach_header.magic == MH_MAGIC) {
+
+ *text_address = (char *)kmod_address;
+ *text_size = driverCode->getLength();
+ return 1;
+
+ } else if (kmod_headers->fat_header.magic == FAT_MAGIC ||
+ kmod_headers->fat_header.magic == FAT_CIGAM) {
+ // CIGAM is byte-swapped MAGIC
+
+ load_return_t load_return;
+ struct fat_arch fatinfo;
+
+ load_return = fatfile_getarch(NULL, kmod_address, &fatinfo);
+ if (load_return != LOAD_SUCCESS) {
+ IOLog("text_address_for_kmod(): Extension \"%s\" "
+ "doesn't contain code for this computer.\n", kmod_name);
+ LOG_DELAY();
+ return 0;
+ }
+
+ *text_address = (char *)(kmod_address + fatinfo.offset);
+ *text_size = fatinfo.size;
+ return 1;
+
+ } else {
+ IOLog("text_address_for_kmod(): Extension \"%s\" either "
+ "isn't code or doesn't contain code for this computer.\n",
+ kmod_name);
+ LOG_DELAY();
+ return 0;
+ }
+
+ return 1;
}
+
/*********************************************************************
*********************************************************************/
-bool stamp_kmod(const char * kmod_name, kmod_info_t * kmod_info) {
+bool verify_kmod(const char * kmod_name, kmod_info_t * kmod_info) {
bool result = false;
OSDictionary * extensionsDict = NULL; // don't release
OSDictionary * kmodDict = NULL; // don't release
OSDictionary * plist = NULL; // don't release
OSString * versionString = NULL; // don't release
- const char * plist_version = NULL; // don't free
-
- if (strlen(kmod_name) + 1 > KMOD_MAX_NAME) {
- IOLog("stamp_kmod(): Kext identifier \"%s\" is too long.\n",
- kmod_name);
+ UInt32 plist_vers;
+ UInt32 kmod_vers;
+
+ if (strncmp(kmod_name, kmod_info->name, sizeof(kmod_info->name))) {
+ IOLog("verify_kmod(): kmod loaded as \"%s\" has different "
+ "identifier \"%s\".\n", kmod_name, kmod_info->name);
LOG_DELAY();
result = false;
goto finish;
}
- strcpy(kmod_info->name, kmod_name);
+ if (!VERS_parse_string(kmod_info->version,
+ &kmod_vers)) {
+
+ IOLog(VTYELLOW "verify_kmod(): kmod \"%s\" has an invalid "
+ "version.\n" VTRESET, kmod_info->name);
+ LOG_DELAY();
+ result = false;
+ goto finish;
+ }
+
/* Get the dictionary of startup extensions.
* This is keyed by module name.
*/
extensionsDict = getStartupExtensions();
if (!extensionsDict) {
- IOLog("stamp_kmod(): No extensions dictionary.\n");
+ IOLog("verify_kmod(): No extensions dictionary.\n");
LOG_DELAY();
result = false;
goto finish;
@@ -728,7 +772,7 @@
kmodDict = OSDynamicCast(OSDictionary,
extensionsDict->getObject(kmod_name));
if (!kmodDict) {
- IOLog("stamp_kmod(): Can't find record for kmod \"%s\".\n",
+ IOLog("verify_kmod(): Can't find record for kmod \"%s\".\n",
kmod_name);
LOG_DELAY();
result = false;
@@ -736,53 +780,52 @@
}
plist = OSDynamicCast(OSDictionary,
- kmodDict->getObject("plist"));
+ extensionsDict->getObject("plist"));
if (!kmodDict) {
- IOLog("stamp_kmod(): Kmod \"%s\" has no property list.\n",
+ IOLog("verify_kmod(): Kmod \"%s\" has no property list.\n",
kmod_name);
LOG_DELAY();
result = false;
goto finish;
}
- /*****
- * Get the kext's version and stuff it into the kmod. This used
- * to be a check that the kext & kmod had the same version, but
- * now we just overwrite the kmod's version.
- */
-
versionString = OSDynamicCast(OSString,
- plist->getObject("CFBundleVersion"));
+ extensionsDict->getObject("CFBundleVersion"));
if (!versionString) {
- IOLog("stamp_kmod(): Kmod \"%s\" has no \"CFBundleVersion\" "
- "property.\n",
+ IOLog(VTYELLOW "verify_kmod(): Kmod \"%s\" has no \"CFBundleVersion\" "
+ "property.\n" VTRESET,
kmod_name);
LOG_DELAY();
result = false;
goto finish;
}
- plist_version = versionString->getCStringNoCopy();
- if (!plist_version) {
- IOLog("stamp_kmod(): Can't get C string for kext version.\n");
+ if (!VERS_parse_string(versionString->getCStringNoCopy(),
+ &plist_vers)) {
+
+ IOLog(VTYELLOW "verify_kmod(): Property list for kmod \"%s\" has "
+ "an invalid version.\n" VTRESET, kmod_info->name);
LOG_DELAY();
result = false;
goto finish;
}
- if (strlen(plist_version) + 1 > KMOD_MAX_NAME) {
- IOLog("stamp_kmod(): Version \"%s\" of kext \"%s\" is too long.\n",
- plist_version, kmod_name);
+ if (kmod_vers != plist_vers) {
+ IOLog(VTYELLOW "verify_kmod(): Kmod \"%s\" and its property list "
+ "claim different versions (%s & %s).\n" VTRESET,
+ kmod_info->name,
+ kmod_info->version,
+ versionString->getCStringNoCopy());
LOG_DELAY();
result = false;
goto finish;
}
- strcpy(kmod_info->version, plist_version);
-
- result = true;
finish:
+
+ // FIXME: make this really return the result after conversion
+ return true;
return result;
}
@@ -810,8 +853,7 @@
struct mach_header * kmod_header;
unsigned long kld_result;
int do_kld_unload = 0;
- kmod_info_t * kmod_info_freeme = 0;
- kmod_info_t * kmod_info = 0;
+ kmod_info_t * kmod_info;
kmod_t kmod_id;
@@ -839,8 +881,8 @@
/* If the requested kmod is already loaded, there's no work to do.
*/
- kmod_info_freeme = kmod_lookupbyname_locked(requested_kmod_name);
- if (kmod_info_freeme) {
+ kmod_info = kmod_lookupbyname(requested_kmod_name);
+ if (kmod_info) {
// FIXME: Need to check for version mismatch if already loaded.
result = KERN_SUCCESS;
goto finish;
@@ -863,9 +905,6 @@
goto finish;
}
- bzero(kmod_dependencies, num_dependencies *
- sizeof(kmod_info_t *));
-
for (i = 0; i < num_dependencies; i++) {
currentKmodName = OSDynamicCast(OSString,
@@ -882,7 +921,7 @@
const char * current_kmod_name = currentKmodName->getCStringNoCopy();
// These globals are needed by the kld_address functions
- g_current_kmod_info = kmod_lookupbyname_locked(current_kmod_name);
+ g_current_kmod_info = kmod_lookupbyname(current_kmod_name);
g_current_kmod_name = current_kmod_name;
if (!g_current_kmod_info) {
@@ -907,27 +946,20 @@
if (!g_current_kmod_info->size)
continue;
- if (!kld_file_merge_OSObjects(current_kmod_name)) {
- IOLog("load_kmod(): Can't merge OSObjects \"%s\".\n",
- current_kmod_name);
+ if (!get_text_info_for_kmod(current_kmod_name,
+ &kmod_address, &kmod_size)) {
+
+ IOLog("get_text_info_for_kmod() failed for dependency kmod "
+ "\"%s\".\n", current_kmod_name);
LOG_DELAY();
result = KERN_FAILURE;
goto finish;
}
- kmod_address = (char *)
- kld_file_getaddr(current_kmod_name, (long *) &kmod_size);
- if (!kmod_address) {
-
- IOLog("load_kmod() failed for dependency kmod "
- "\"%s\".\n", current_kmod_name);
- LOG_DELAY();
- result = KERN_FAILURE;
- goto finish;
- }
-
kld_result = kld_load_from_memory(&kmod_header,
- current_kmod_name, kmod_address, kmod_size);
+ current_kmod_name,
+ (char *)kmod_address,
+ kmod_size);
if (kld_result) {
do_kld_unload = 1;
@@ -954,26 +986,19 @@
g_current_kmod_name = requested_kmod_name;
g_current_kmod_info = 0; // there is no kmod yet
- if (!map_and_patch(requested_kmod_name)) {
- IOLog("load_kmod: map_and_patch() failed for "
- "kmod \"%s\".\n", requested_kmod_name);
- LOG_DELAY();
- result = KERN_FAILURE;
- goto finish;
- }
-
- kmod_address = (char *)
- kld_file_getaddr(requested_kmod_name, (long *) &kmod_size);
- if (!kmod_address) {
- IOLog("load_kmod: kld_file_getaddr() failed internal error "
- "on \"%s\".\n", requested_kmod_name);
+ if (!get_text_info_for_kmod(requested_kmod_name,
+ &kmod_address, &kmod_size)) {
+ IOLog("load_kmod: get_text_info_for_kmod() failed for "
+ "kmod \"%s\".\n", requested_kmod_name);
LOG_DELAY();
result = KERN_FAILURE;
goto finish;
}
kld_result = kld_load_from_memory(&kmod_header,
- requested_kmod_name, kmod_address, kmod_size);
+ requested_kmod_name,
+ (char *)kmod_address,
+ kmod_size);
if (kld_result) {
do_kld_unload = 1;
@@ -1011,8 +1036,8 @@
}
- if (!stamp_kmod(requested_kmod_name, kmod_info)) {
- // stamp_kmod() logs a meaningful message
+ if (!verify_kmod(requested_kmod_name, kmod_info)) {
+ // verify_kmod() logs a meaningful message
result = KERN_FAILURE;
goto finish;
}
@@ -1043,11 +1068,9 @@
goto finish;
}
-#if DEBUG
IOLog("kmod id %d successfully created at 0x%lx, size %ld.\n",
(unsigned int)kmod_id, link_buffer_address, link_buffer_size);
LOG_DELAY();
-#endif DEBUG
/* Record dependencies for the newly-loaded kmod.
*/
@@ -1081,14 +1104,11 @@
finish:
- if (kmod_info_freeme) {
- kfree(kmod_info_freeme, sizeof(kmod_info_t));
- }
-
/* Only do a kld_unload_all() if at least one load happened.
*/
if (do_kld_unload) {
kld_unload_all(/* deallocate sets */ 1);
+
}
/* If the link failed, blow away the allocated link buffer.
@@ -1098,11 +1118,6 @@
}
if (kmod_dependencies) {
- for (i = 0; i < num_dependencies; i++) {
- if (kmod_dependencies[i]) {
- kfree(kmod_dependencies[i], sizeof(kmod_info_t));
- }
- }
kfree((unsigned int)kmod_dependencies,
num_dependencies * sizeof(kmod_info_t *));
}
@@ -1131,17 +1146,25 @@
__private_extern__
kern_return_t load_kernel_extension(char * kmod_name) {
kern_return_t result = KERN_SUCCESS;
- kmod_info_t * kmod_info = 0; // must free
+ kmod_info_t * kmod_info;
OSArray * dependencyList = NULL; // must release
OSArray * curDependencyList = NULL; // must release
+
+ /* This must be the very first thing done by this function.
+ */
+ IOLockLock(kld_lock);
+
+
/* See if the kmod is already loaded.
*/
- kmod_info = kmod_lookupbyname_locked(kmod_name);
+ kmod_info = kmod_lookupbyname(kmod_name);
if (kmod_info) { // NOT checked
result = KERN_SUCCESS;
goto finish;
}
+
+ // FIXME: Need to check whether kmod is built into the kernel!
/* It isn't loaded; build a dependency list and
* load those.
@@ -1158,6 +1181,21 @@
goto finish;
}
+ if (!verifyCompatibleVersions(dependencyList)) {
+ IOLog(VTYELLOW "load_kernel_extension(): "
+ "Version mismatch for kernel extension \"%s\".\n" VTRESET,
+ kmod_name);
+ LOG_DELAY();
+#if 0
+// FIXME: This is currently a warning only; when kexts are updated
+// this will become an error.
+ result = KERN_FAILURE;
+ goto finish;
+#else
+ IOLog(VTYELLOW "Loading anyway.\n" VTRESET);
+#endif 0
+ }
+
count = dependencyList->getCount();
for (i = 0; i < count; i++) {
kern_return_t load_result;
@@ -1168,34 +1206,22 @@
dependencyList->getObject(i));
cur_kmod_name = curKmodName->getCStringNoCopy();
curDependencyList = getDependencyListForKmod(cur_kmod_name);
- if (!curDependencyList) {
+
+ load_result = load_kmod(curDependencyList);
+ if (load_result != KERN_SUCCESS) {
IOLog("load_kernel_extension(): "
- "Can't get dependencies for kernel extension \"%s\".\n",
+ "load_kmod() failed for kmod \"%s\".\n",
cur_kmod_name);
LOG_DELAY();
- result = KERN_FAILURE;
- goto finish;
- } else {
- load_result = load_kmod(curDependencyList);
- if (load_result != KERN_SUCCESS) {
- IOLog("load_kernel_extension(): "
- "load_kmod() failed for kmod \"%s\".\n",
- cur_kmod_name);
- LOG_DELAY();
- result = load_result;
- goto finish;
- }
- curDependencyList->release();
- curDependencyList = NULL;
- }
+ result = load_result;
+ goto finish;
+ }
+ curDependencyList->release();
+ curDependencyList = NULL;
}
finish:
-
- if (kmod_info) {
- kfree(kmod_info, sizeof(kmod_info_t));
- }
if (dependencyList) {
dependencyList->release();
@@ -1206,5 +1232,9 @@
curDependencyList = NULL;
}
+ /* This must be the very last thing done before returning.
+ */
+ IOLockUnlock(kld_lock);
+
return result;
}