/*
- * Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 1998-2006 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2007-2012 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
#include <IOKit/IOPlatformExpert.h>
#include <IOKit/IOUserClient.h>
#include <IOKit/IOKitKeys.h>
+#include <IOKit/IOKitKeysPrivate.h>
+#include <kern/debug.h>
+#include <pexpert/pexpert.h>
+
+#if CONFIG_MACF
+extern "C" {
+#include <security/mac.h>
+#include <security/mac_framework.h>
+};
+#endif /* MAC */
#define super IOService
#define kIONVRAMPrivilege kIOClientPrivilegeAdministrator
//#define kIONVRAMPrivilege kIOClientPrivilegeLocalUser
-
OSDefineMetaClassAndStructors(IODTNVRAM, IOService);
bool IODTNVRAM::init(IORegistryEntry *old, const IORegistryPlane *plane)
_registryPropertiesKey = OSSymbol::withCStringNoCopy("aapl,pci");
if (_registryPropertiesKey == 0) return false;
+ // <rdar://problem/9529235> race condition possible between
+ // IODTNVRAM and IONVRAMController (restore loses boot-args)
+ initProxyData();
+
return true;
}
+void IODTNVRAM::initProxyData(void)
+{
+ IORegistryEntry *entry;
+ const char *key = "nvram-proxy-data";
+ OSObject *prop;
+ OSData *data;
+ const void *bytes;
+
+ entry = IORegistryEntry::fromPath("/chosen", gIODTPlane);
+ if (entry != 0) {
+ prop = entry->getProperty(key);
+ if (prop != 0) {
+ data = OSDynamicCast(OSData, prop);
+ if (data != 0) {
+ bytes = data->getBytesNoCopy();
+ if ((bytes != 0) && (data->getLength() <= kIODTNVRAMImageSize)) {
+ bcopy(bytes, _nvramImage, data->getLength());
+ initNVRAMImage();
+ _isProxied = true;
+ }
+ }
+ }
+ entry->removeProperty(key);
+ entry->release();
+ }
+}
+
void IODTNVRAM::registerNVRAMController(IONVRAMController *nvram)
+{
+ if (_nvramController != 0) return;
+
+ _nvramController = nvram;
+
+ // <rdar://problem/9529235> race condition possible between
+ // IODTNVRAM and IONVRAMController (restore loses boot-args)
+ if (!_isProxied) {
+ _nvramController->read(0, _nvramImage, kIODTNVRAMImageSize);
+ initNVRAMImage();
+ } else {
+ IOLockLock(_ofLock);
+ (void) syncVariables();
+ IOLockUnlock(_ofLock);
+ }
+}
+
+void IODTNVRAM::initNVRAMImage(void)
{
char partitionID[18];
UInt32 partitionOffset, partitionLength;
UInt32 currentLength, currentOffset = 0;
OSNumber *partitionOffsetNumber, *partitionLengthNumber;
- if (_nvramController != 0) return;
-
- _nvramController = nvram;
-
- _nvramController->read(0, _nvramImage, kIODTNVRAMImageSize);
-
// Find the offsets for the OF, XPRAM, NameRegistry and PanicInfo partitions.
_ofPartitionOffset = 0xFFFFFFFF;
- _xpramPartitionOffset = 0xFFFFFFFF;
- _nrPartitionOffset = 0xFFFFFFFF;
_piPartitionOffset = 0xFFFFFFFF;
freePartitionOffset = 0xFFFFFFFF;
freePartitionSize = 0;
- if (getPlatform()->getBootROMType()) {
- // Look through the partitions to find the OF, MacOS partitions.
- while (currentOffset < kIODTNVRAMImageSize) {
- currentLength = ((UInt16 *)(_nvramImage + currentOffset))[1] * 16;
+
+ // Look through the partitions to find the OF, MacOS partitions.
+ while (currentOffset < kIODTNVRAMImageSize) {
+ currentLength = ((UInt16 *)(_nvramImage + currentOffset))[1] * 16;
+
+ if (currentLength < 16) break;
+ partitionOffset = currentOffset + 16;
+ partitionLength = currentLength - 16;
+ if ((partitionOffset + partitionLength) > kIODTNVRAMImageSize) break;
+
+ if (strncmp((const char *)_nvramImage + currentOffset + 4,
+ kIODTNVRAMOFPartitionName, 12) == 0) {
+ _ofPartitionOffset = partitionOffset;
+ _ofPartitionSize = partitionLength;
+ } else if (strncmp((const char *)_nvramImage + currentOffset + 4,
+ kIODTNVRAMXPRAMPartitionName, 12) == 0) {
+ } else if (strncmp((const char *)_nvramImage + currentOffset + 4,
+ kIODTNVRAMPanicInfoPartitonName, 12) == 0) {
+ _piPartitionOffset = partitionOffset;
+ _piPartitionSize = partitionLength;
+ } else if (strncmp((const char *)_nvramImage + currentOffset + 4,
+ kIODTNVRAMFreePartitionName, 12) == 0) {
+ freePartitionOffset = currentOffset;
+ freePartitionSize = currentLength;
+ } else {
+ // Construct the partition ID from the signature and name.
+ snprintf(partitionID, sizeof(partitionID), "0x%02x,",
+ *(UInt8 *)(_nvramImage + currentOffset));
+ strncpy(partitionID + 5,
+ (const char *)(_nvramImage + currentOffset + 4), 12);
+ partitionID[17] = '\0';
- partitionOffset = currentOffset + 16;
- partitionLength = currentLength - 16;
+ partitionOffsetNumber = OSNumber::withNumber(partitionOffset, 32);
+ partitionLengthNumber = OSNumber::withNumber(partitionLength, 32);
- if (strncmp((const char *)_nvramImage + currentOffset + 4,
- kIODTNVRAMOFPartitionName, 12) == 0) {
- _ofPartitionOffset = partitionOffset;
- _ofPartitionSize = partitionLength;
- } else if (strncmp((const char *)_nvramImage + currentOffset + 4,
- kIODTNVRAMXPRAMPartitionName, 12) == 0) {
- _xpramPartitionOffset = partitionOffset;
- _xpramPartitionSize = kIODTNVRAMXPRAMSize;
- _nrPartitionOffset = _xpramPartitionOffset + _xpramPartitionSize;
- _nrPartitionSize = partitionLength - _xpramPartitionSize;
- } else if (strncmp((const char *)_nvramImage + currentOffset + 4,
- kIODTNVRAMPanicInfoPartitonName, 12) == 0) {
- _piPartitionOffset = partitionOffset;
- _piPartitionSize = partitionLength;
- } else if (strncmp((const char *)_nvramImage + currentOffset + 4,
- kIODTNVRAMFreePartitionName, 12) == 0) {
- freePartitionOffset = currentOffset;
- freePartitionSize = currentLength;
- } else {
- // Construct the partition ID from the signature and name.
- sprintf(partitionID, "0x%02x,",
- *(UInt8 *)(_nvramImage + currentOffset));
- strncpy(partitionID + 5,
- (const char *)(_nvramImage + currentOffset + 4), 12);
- partitionID[17] = '\0';
-
- partitionOffsetNumber = OSNumber::withNumber(partitionOffset, 32);
- partitionLengthNumber = OSNumber::withNumber(partitionLength, 32);
-
- // Save the partition offset and length
- _nvramPartitionOffsets->setObject(partitionID, partitionOffsetNumber);
- _nvramPartitionLengths->setObject(partitionID, partitionLengthNumber);
-
- partitionOffsetNumber->release();
- partitionLengthNumber->release();
- }
- currentOffset += currentLength;
+ // Save the partition offset and length
+ _nvramPartitionOffsets->setObject(partitionID, partitionOffsetNumber);
+ _nvramPartitionLengths->setObject(partitionID, partitionLengthNumber);
+
+ partitionOffsetNumber->release();
+ partitionLengthNumber->release();
}
- } else {
- // Use the fixed address for old world machines.
- _ofPartitionOffset = 0x1800;
- _ofPartitionSize = 0x0800;
- _xpramPartitionOffset = 0x1300;
- _xpramPartitionSize = 0x0100;
- _nrPartitionOffset = 0x1400;
- _nrPartitionSize = 0x0400;
+ currentOffset += currentLength;
}
if (_ofPartitionOffset != 0xFFFFFFFF)
_ofImage = _nvramImage + _ofPartitionOffset;
- if (_xpramPartitionOffset != 0xFFFFFFFF)
- _xpramImage = _nvramImage + _xpramPartitionOffset;
- if (_nrPartitionOffset != 0xFFFFFFFF)
- _nrImage = _nvramImage + _nrPartitionOffset;
if (_piPartitionOffset == 0xFFFFFFFF) {
if (freePartitionSize > 0x20) {
// Set the partition checksum.
_nvramImage[freePartitionOffset + 1] =
calculatePartitionChecksum(_nvramImage + freePartitionOffset);
-
- // Set the nvram image as dirty.
- _nvramImageDirty = true;
+
+ if (_nvramController != 0) {
+ _nvramController->write(0, _nvramImage, kIODTNVRAMImageSize);
+ }
}
} else {
_piImage = _nvramImage + _piPartitionOffset;
}
+ _lastDeviceSync = 0;
+ _freshInterval = TRUE; // we will allow sync() even before the first 15 minutes have passed.
+
initOFVariables();
}
-void IODTNVRAM::sync(void)
+void IODTNVRAM::syncInternal(bool rateLimit)
{
- if (!_nvramImageDirty && !_ofImageDirty) return;
-
- // Don't try to sync OF Variables if the system has already paniced.
- if (!_systemPaniced) syncOFVariables();
+ // Don't try to perform controller operations if none has been registered.
+ if (_nvramController == 0) return;
+
+ // Rate limit requests to sync. Drivers that need this rate limiting will
+ // shadow the data and only write to flash when they get a sync call
+ if (rateLimit && !safeToSync()) return;
- _nvramController->write(0, _nvramImage, kIODTNVRAMImageSize);
_nvramController->sync();
-
- _nvramImageDirty = false;
+}
+
+void IODTNVRAM::sync(void)
+{
+ syncInternal(false);
}
bool IODTNVRAM::serializeProperties(OSSerialize *s) const
{
- bool result;
+ bool result, hasPrivilege;
UInt32 variablePerm;
const OSSymbol *key;
- OSDictionary *dict, *tmpDict = 0;
+ OSDictionary *dict;
OSCollectionIterator *iter = 0;
- if (_ofDict == 0) return false;
-
// Verify permissions.
- result = IOUserClient::clientHasPrivilege(current_task(), kIONVRAMPrivilege);
- if (result != kIOReturnSuccess) {
- tmpDict = OSDictionary::withCapacity(1);
- if (tmpDict == 0) return false;
-
- iter = OSCollectionIterator::withCollection(_ofDict);
- if (iter == 0) return false;
-
+ hasPrivilege = (kIOReturnSuccess == IOUserClient::clientHasPrivilege(current_task(), kIONVRAMPrivilege));
+
+ if (_ofDict == 0) {
+ /* No nvram. Return an empty dictionary. */
+ dict = OSDictionary::withCapacity(1);
+ if (dict == 0) return false;
+ } else {
+ IOLockLock(_ofLock);
+ dict = OSDictionary::withDictionary(_ofDict);
+ IOLockUnlock(_ofLock);
+ if (dict == 0) return false;
+
+ /* Copy properties with client privilege. */
+ iter = OSCollectionIterator::withCollection(dict);
+ if (iter == 0) {
+ dict->release();
+ return false;
+ }
while (1) {
key = OSDynamicCast(OSSymbol, iter->getNextObject());
if (key == 0) break;
variablePerm = getOFVariablePerm(key);
- if (variablePerm != kOFVariablePermRootOnly) {
- tmpDict->setObject(key, _ofDict->getObject(key));
+ if ((hasPrivilege || (variablePerm != kOFVariablePermRootOnly)) &&
+ ( ! (variablePerm == kOFVariablePermKernelOnly && current_task() != kernel_task) )
+#if CONFIG_MACF
+ && (current_task() == kernel_task || mac_iokit_check_nvram_get(kauth_cred_get(), key->getCStringNoCopy()) == 0)
+#endif
+ ) { }
+ else {
+ dict->removeObject(key);
+ iter->reset();
}
}
- dict = tmpDict;
- } else {
- dict = _ofDict;
}
-
+
result = dict->serialize(s);
-
- if (tmpDict != 0) tmpDict->release();
+
+ dict->release();
if (iter != 0) iter->release();
return result;
}
-OSObject *IODTNVRAM::getProperty(const OSSymbol *aKey) const
+OSObject *IODTNVRAM::copyProperty(const OSSymbol *aKey) const
{
IOReturn result;
UInt32 variablePerm;
+ OSObject *theObject;
if (_ofDict == 0) return 0;
// Verify permissions.
+ variablePerm = getOFVariablePerm(aKey);
result = IOUserClient::clientHasPrivilege(current_task(), kIONVRAMPrivilege);
if (result != kIOReturnSuccess) {
- variablePerm = getOFVariablePerm(aKey);
if (variablePerm == kOFVariablePermRootOnly) return 0;
}
-
- return _ofDict->getObject(aKey);
+ if (variablePerm == kOFVariablePermKernelOnly && current_task() != kernel_task) return 0;
+
+#if CONFIG_MACF
+ if (current_task() != kernel_task &&
+ mac_iokit_check_nvram_get(kauth_cred_get(), aKey->getCStringNoCopy()) != 0)
+ return 0;
+#endif
+
+ IOLockLock(_ofLock);
+ theObject = _ofDict->getObject(aKey);
+ if (theObject) theObject->retain();
+ IOLockUnlock(_ofLock);
+
+ return theObject;
}
-OSObject *IODTNVRAM::getProperty(const char *aKey) const
+OSObject *IODTNVRAM::copyProperty(const char *aKey) const
{
const OSSymbol *keySymbol;
OSObject *theObject = 0;
- keySymbol = OSSymbol::withCStringNoCopy(aKey);
+ keySymbol = OSSymbol::withCString(aKey);
if (keySymbol != 0) {
- theObject = getProperty(keySymbol);
+ theObject = copyProperty(keySymbol);
keySymbol->release();
}
return theObject;
}
+OSObject *IODTNVRAM::getProperty(const OSSymbol *aKey) const
+{
+ OSObject *theObject;
+
+ theObject = copyProperty(aKey);
+ if (theObject) theObject->release();
+
+ return theObject;
+}
+
+OSObject *IODTNVRAM::getProperty(const char *aKey) const
+{
+ OSObject *theObject;
+
+ theObject = copyProperty(aKey);
+ if (theObject) theObject->release();
+
+ return theObject;
+}
+
bool IODTNVRAM::setProperty(const OSSymbol *aKey, OSObject *anObject)
{
bool result;
UInt32 propType, propPerm;
OSString *tmpString;
- OSObject *propObject = 0;
-
+ OSObject *propObject = 0, *oldObject;
+
if (_ofDict == 0) return false;
-
+
// Verify permissions.
- result = IOUserClient::clientHasPrivilege(current_task(), kIONVRAMPrivilege);
- if (result != kIOReturnSuccess) {
- propPerm = getOFVariablePerm(aKey);
+ propPerm = getOFVariablePerm(aKey);
+ if (IOUserClient::clientHasPrivilege(current_task(), kIONVRAMPrivilege) != kIOReturnSuccess) {
if (propPerm != kOFVariablePermUserWrite) return false;
}
-
- // Don't allow creation of new properties on old world machines.
- if (getPlatform()->getBootROMType() == 0) {
- if (_ofDict->getObject(aKey) == 0) return false;
- }
-
+ if (propPerm == kOFVariablePermKernelOnly && current_task() != kernel_task) return 0;
+
// Don't allow change of 'aapl,panic-info'.
if (aKey->isEqualTo(kIODTNVRAMPanicInfoKey)) return false;
+
+#if CONFIG_MACF
+ if (current_task() != kernel_task &&
+ mac_iokit_check_nvram_set(kauth_cred_get(), aKey->getCStringNoCopy(), anObject) != 0)
+ return false;
+#endif
// Make sure the object is of the correct type.
propType = getOFVariableType(aKey);
case kOFVariableTypeBoolean :
propObject = OSDynamicCast(OSBoolean, anObject);
break;
-
+
case kOFVariableTypeNumber :
propObject = OSDynamicCast(OSNumber, anObject);
break;
-
+
case kOFVariableTypeString :
propObject = OSDynamicCast(OSString, anObject);
break;
-
+
case kOFVariableTypeData :
propObject = OSDynamicCast(OSData, anObject);
if (propObject == 0) {
}
break;
}
-
+
if (propObject == 0) return false;
-
+
+ IOLockLock(_ofLock);
+
+ oldObject = _ofDict->getObject(aKey);
+ if (oldObject) {
+ oldObject->retain();
+ }
result = _ofDict->setObject(aKey, propObject);
-
+
if (result) {
- if (getPlatform()->getBootROMType() == 0) {
- updateOWBootArgs(aKey, propObject);
+ if (syncVariables() != kIOReturnSuccess) {
+ if (oldObject) {
+ _ofDict->setObject(aKey, oldObject);
+ }
+ else {
+ _ofDict->removeObject(aKey);
+ }
+ (void) syncVariables();
+ result = false;
}
-
- _ofImageDirty = true;
}
-
+
+ if (oldObject) {
+ oldObject->release();
+ }
+
+ IOLockUnlock(_ofLock);
+
return result;
}
if (_ofDict == 0) return;
// Verify permissions.
+ propPerm = getOFVariablePerm(aKey);
result = IOUserClient::clientHasPrivilege(current_task(), kIOClientPrivilegeAdministrator);
if (result != kIOReturnSuccess) {
- propPerm = getOFVariablePerm(aKey);
if (propPerm != kOFVariablePermUserWrite) return;
}
-
- // Don't allow removal of properties on old world machines.
- if (getPlatform()->getBootROMType() == 0) return;
+ if (propPerm == kOFVariablePermKernelOnly && current_task() != kernel_task) return;
// Don't allow change of 'aapl,panic-info'.
if (aKey->isEqualTo(kIODTNVRAMPanicInfoKey)) return;
+#if CONFIG_MACF
+ if (current_task() != kernel_task &&
+ mac_iokit_check_nvram_delete(kauth_cred_get(), aKey->getCStringNoCopy()) != 0)
+ return;
+#endif
+
// If the object exists, remove it from the dictionary.
+
+ IOLockLock(_ofLock);
result = _ofDict->getObject(aKey) != 0;
if (result) {
_ofDict->removeObject(aKey);
-
- _ofImageDirty = true;
}
+
+ if (result) {
+ (void) syncVariables();
+ }
+
+ IOLockUnlock(_ofLock);
}
IOReturn IODTNVRAM::setProperties(OSObject *properties)
if (object == 0) continue;
if (key->isEqualTo(kIONVRAMDeletePropertyKey)) {
- tmpStr = OSDynamicCast(OSString, object);
- if (tmpStr != 0) {
- key = OSSymbol::withString(tmpStr);
- removeProperty(key);
- key->release();
- result = true;
- } else {
- result = false;
- }
- } else {
- result = setProperty(key, object);
+ tmpStr = OSDynamicCast(OSString, object);
+ if (tmpStr != 0) {
+ key = OSSymbol::withString(tmpStr);
+ removeProperty(key);
+ key->release();
+ result = true;
+ } else {
+ result = false;
+ }
+ } else if(key->isEqualTo(kIONVRAMSyncNowPropertyKey) || key->isEqualTo(kIONVRAMForceSyncNowPropertyKey)) {
+ tmpStr = OSDynamicCast(OSString, object);
+ if (tmpStr != 0) {
+
+ result = true;
+
+ // We still want to throttle NVRAM commit rate for SyncNow. ForceSyncNow is provided as a really big hammer.
+
+ syncInternal(key->isEqualTo(kIONVRAMSyncNowPropertyKey));
+
+ } else {
+ result = false;
+ }
+ }
+ else {
+ result = setProperty(key, object);
}
+
}
iter->release();
IOReturn IODTNVRAM::readXPRAM(IOByteCount offset, UInt8 *buffer,
IOByteCount length)
{
- if (_xpramImage == 0) return kIOReturnUnsupported;
-
- if ((buffer == 0) || (length == 0) ||
- (offset + length > kIODTNVRAMXPRAMSize))
- return kIOReturnBadArgument;
-
- bcopy(_nvramImage + _xpramPartitionOffset + offset, buffer, length);
-
- return kIOReturnSuccess;
+ return kIOReturnUnsupported;
}
IOReturn IODTNVRAM::writeXPRAM(IOByteCount offset, UInt8 *buffer,
IOByteCount length)
{
- if (_xpramImage == 0) return kIOReturnUnsupported;
-
- if ((buffer == 0) || (length == 0) ||
- (offset + length > kIODTNVRAMXPRAMSize))
- return kIOReturnBadArgument;
-
- bcopy(buffer, _nvramImage + _xpramPartitionOffset + offset, length);
-
- _nvramImageDirty = true;
-
- return kIOReturnSuccess;
+ return kIOReturnUnsupported;
}
IOReturn IODTNVRAM::readNVRAMProperty(IORegistryEntry *entry,
{
IOReturn err;
- if (getPlatform()->getBootROMType())
- err = readNVRAMPropertyType1(entry, name, value);
- else
- err = readNVRAMPropertyType0(entry, name, value);
+ err = readNVRAMPropertyType1(entry, name, value);
return err;
}
{
IOReturn err;
- if (getPlatform()->getBootROMType())
- err = writeNVRAMPropertyType1(entry, name, value);
- else
- err = writeNVRAMPropertyType0(entry, name, value);
+ err = writeNVRAMPropertyType1(entry, name, value);
return err;
}
IOByteCount length)
{
OSNumber *partitionOffsetNumber, *partitionLengthNumber;
- UInt32 partitionOffset, partitionLength;
+ UInt32 partitionOffset, partitionLength, end;
partitionOffsetNumber =
(OSNumber *)_nvramPartitionOffsets->getObject(partitionID);
partitionOffset = partitionOffsetNumber->unsigned32BitValue();
partitionLength = partitionLengthNumber->unsigned32BitValue();
- if ((buffer == 0) || (length == 0) ||
- (offset + length > partitionLength))
+ if (os_add_overflow(offset, length, &end)) return kIOReturnBadArgument;
+ if ((buffer == 0) || (length == 0) || (end > partitionLength))
return kIOReturnBadArgument;
bcopy(_nvramImage + partitionOffset + offset, buffer, length);
IOByteCount length)
{
OSNumber *partitionOffsetNumber, *partitionLengthNumber;
- UInt32 partitionOffset, partitionLength;
+ UInt32 partitionOffset, partitionLength, end;
partitionOffsetNumber =
(OSNumber *)_nvramPartitionOffsets->getObject(partitionID);
partitionOffset = partitionOffsetNumber->unsigned32BitValue();
partitionLength = partitionLengthNumber->unsigned32BitValue();
- if ((buffer == 0) || (length == 0) ||
- (offset + length > partitionLength))
+ if (os_add_overflow(offset, length, &end)) return kIOReturnBadArgument;
+ if ((buffer == 0) || (length == 0) || (end > partitionLength))
return kIOReturnBadArgument;
bcopy(buffer, _nvramImage + partitionOffset + offset, length);
- _nvramImageDirty = true;
+ if (_nvramController != 0) {
+ _nvramController->write(0, _nvramImage, kIODTNVRAMImageSize);
+ }
return kIOReturnSuccess;
}
-UInt32 IODTNVRAM::savePanicInfo(UInt8 *buffer, IOByteCount length)
+IOByteCount IODTNVRAM::savePanicInfo(UInt8 *buffer, IOByteCount length)
{
if ((_piImage == 0) || (length <= 0)) return 0;
// Save the Panic Info length.
*(UInt32 *)_piImage = length;
- _nvramImageDirty = true;
-
+ if (_nvramController != 0) {
+ _nvramController->write(0, _nvramImage, kIODTNVRAMImageSize);
+ }
+ /*
+ * This prevents OF variables from being committed if the system has panicked
+ */
_systemPaniced = true;
-
+ /* The call to sync() forces the NVRAM controller to write the panic info
+ * partition to NVRAM.
+ */
+ sync();
+
return length;
}
return csum;
}
-struct OWVariablesHeader {
- UInt16 owMagic;
- UInt8 owVersion;
- UInt8 owPages;
- UInt16 owChecksum;
- UInt16 owHere;
- UInt16 owTop;
- UInt16 owNext;
- UInt32 owFlags;
- UInt32 owNumbers[9];
- struct {
- UInt16 offset;
- UInt16 length;
- } owStrings[10];
-};
-typedef struct OWVariablesHeader OWVariablesHeader;
-
IOReturn IODTNVRAM::initOFVariables(void)
{
- UInt32 cnt, propOffset, propType;
+ UInt32 cnt;
UInt8 *propName, *propData;
UInt32 propNameLength, propDataLength;
const OSSymbol *propSymbol;
OSObject *propObject;
- OWVariablesHeader *owHeader;
if (_ofImage == 0) return kIOReturnNotReady;
- _ofDict = OSDictionary::withCapacity(1);
- if (_ofDict == 0) return kIOReturnNoMemory;
+ _ofDict = OSDictionary::withCapacity(1);
+ _ofLock = IOLockAlloc();
+ if (!_ofDict || !_ofLock) return kIOReturnNoMemory;
- if (getPlatform()->getBootROMType()) {
- cnt = 0;
- while (cnt < _ofPartitionSize) {
- // Break if there is no name.
- if (_ofImage[cnt] == '\0') break;
-
- // Find the length of the name.
- propName = _ofImage + cnt;
- for (propNameLength = 0; (cnt + propNameLength) < _ofPartitionSize;
- propNameLength++) {
- if (_ofImage[cnt + propNameLength] == '=') break;
- }
-
- // Break if the name goes past the end of the partition.
- if ((cnt + propNameLength) >= _ofPartitionSize) break;
- cnt += propNameLength + 1;
-
- propData = _ofImage + cnt;
- for (propDataLength = 0; (cnt + propDataLength) < _ofPartitionSize;
- propDataLength++) {
- if (_ofImage[cnt + propDataLength] == '\0') break;
- }
-
- // Break if the data goes past the end of the partition.
- if ((cnt + propDataLength) >= _ofPartitionSize) break;
- cnt += propDataLength + 1;
-
- if (convertPropToObject(propName, propNameLength,
- propData, propDataLength,
- &propSymbol, &propObject)) {
- _ofDict->setObject(propSymbol, propObject);
- propSymbol->release();
- propObject->release();
- }
- }
+ cnt = 0;
+ while (cnt < _ofPartitionSize) {
+ // Break if there is no name.
+ if (_ofImage[cnt] == '\0') break;
- // Create the boot-args property if it is not in the dictionary.
- if (_ofDict->getObject("boot-args") == 0) {
- propObject = OSString::withCStringNoCopy("");
- if (propObject != 0) {
- _ofDict->setObject("boot-args", propObject);
- propObject->release();
- }
+ // Find the length of the name.
+ propName = _ofImage + cnt;
+ for (propNameLength = 0; (cnt + propNameLength) < _ofPartitionSize;
+ propNameLength++) {
+ if (_ofImage[cnt + propNameLength] == '=') break;
}
- // Create the 'aapl,panic-info' property if needed.
- if (_piImage != 0) {
- propDataLength = *(UInt32 *)_piImage;
- if ((propDataLength != 0) && (propDataLength < (_piPartitionSize - 4))) {
- propObject = OSData::withBytes(_piImage + 4, propDataLength);
- _ofDict->setObject(kIODTNVRAMPanicInfoKey, propObject);
- propObject->release();
-
- // Clear the length from _piImage and mark dirty.
- *(UInt32 *)_piImage = 0;
- _nvramImageDirty = true;
- }
- }
- } else {
- owHeader = (OWVariablesHeader *)_ofImage;
- if (!validateOWChecksum(_ofImage)) {
- _ofDict->release();
- _ofDict = 0;
- return kIOReturnBadMedia;
+ // Break if the name goes past the end of the partition.
+ if ((cnt + propNameLength) >= _ofPartitionSize) break;
+ cnt += propNameLength + 1;
+
+ propData = _ofImage + cnt;
+ for (propDataLength = 0; (cnt + propDataLength) < _ofPartitionSize;
+ propDataLength++) {
+ if (_ofImage[cnt + propDataLength] == '\0') break;
}
- cnt = 0;
- while (1) {
- if (!getOWVariableInfo(cnt++, &propSymbol, &propType, &propOffset))
- break;
-
- switch (propType) {
- case kOFVariableTypeBoolean :
- propObject = OSBoolean::withBoolean(owHeader->owFlags & propOffset);
- break;
-
- case kOFVariableTypeNumber :
- propObject = OSNumber::withNumber(owHeader->owNumbers[propOffset], 32);
- break;
-
- case kOFVariableTypeString :
- propData = _ofImage + owHeader->owStrings[propOffset].offset -
- _ofPartitionOffset;
- propDataLength = owHeader->owStrings[propOffset].length;
- propName = IONew(UInt8, propDataLength + 1);
- if (propName != 0) {
- strncpy((char *)propName, (const char *)propData, propDataLength);
- propName[propDataLength] = '\0';
- propObject = OSString::withCString((const char *)propName);
- IODelete(propName, UInt8, propDataLength + 1);
- }
- break;
- }
-
- if (propObject == 0) break;
-
+ // Break if the data goes past the end of the partition.
+ if ((cnt + propDataLength) >= _ofPartitionSize) break;
+ cnt += propDataLength + 1;
+
+ if (convertPropToObject(propName, propNameLength,
+ propData, propDataLength,
+ &propSymbol, &propObject)) {
_ofDict->setObject(propSymbol, propObject);
propSymbol->release();
propObject->release();
}
-
- // Create the boot-args property.
- propSymbol = OSSymbol::withCString("boot-command");
- if (propSymbol != 0) {
- propObject = _ofDict->getObject(propSymbol);
- if (propObject != 0) {
- updateOWBootArgs(propSymbol, propObject);
- }
- propSymbol->release();
+ }
+
+ // Create the boot-args property if it is not in the dictionary.
+ if (_ofDict->getObject("boot-args") == 0) {
+ propObject = OSString::withCStringNoCopy("");
+ if (propObject != 0) {
+ _ofDict->setObject("boot-args", propObject);
+ propObject->release();
}
}
+ if (_piImage != 0) {
+ propDataLength = *(UInt32 *)_piImage;
+ if ((propDataLength != 0) && (propDataLength <= (_piPartitionSize - 4))) {
+ propObject = OSData::withBytes(_piImage + 4, propDataLength);
+ _ofDict->setObject(kIODTNVRAMPanicInfoKey, propObject);
+ propObject->release();
+
+ // Clear the length from _piImage and mark dirty.
+ *(UInt32 *)_piImage = 0;
+ if (_nvramController != 0) {
+ _nvramController->write(0, _nvramImage, kIODTNVRAMImageSize);
+ }
+ }
+ }
+
return kIOReturnSuccess;
}
IOReturn IODTNVRAM::syncOFVariables(void)
+{
+ return kIOReturnUnsupported;
+}
+
+IOReturn IODTNVRAM::syncVariables(void)
{
bool ok;
- UInt32 cnt, length, maxLength;
- UInt32 curOffset, tmpOffset, tmpType, tmpDataLength;
+ UInt32 length, maxLength;
UInt8 *buffer, *tmpBuffer;
- const UInt8 *tmpData;
const OSSymbol *tmpSymbol;
OSObject *tmpObject;
- OSBoolean *tmpBoolean;
- OSNumber *tmpNumber;
- OSString *tmpString;
OSCollectionIterator *iter;
- OWVariablesHeader *owHeader, *owHeaderOld;
-
- if ((_ofImage == 0) || (_ofDict == 0)) return kIOReturnNotReady;
-
- if (!_ofImageDirty) return kIOReturnSuccess;
-
- if (getPlatform()->getBootROMType()) {
- buffer = tmpBuffer = IONew(UInt8, _ofPartitionSize);
- if (buffer == 0) return kIOReturnNoMemory;
- bzero(buffer, _ofPartitionSize);
-
- ok = true;
- maxLength = _ofPartitionSize;
-
- iter = OSCollectionIterator::withCollection(_ofDict);
- if (iter == 0) ok = false;
-
- while (ok) {
- tmpSymbol = OSDynamicCast(OSSymbol, iter->getNextObject());
- if (tmpSymbol == 0) break;
-
- // Don't save 'aapl,panic-info'.
- if (tmpSymbol->isEqualTo(kIODTNVRAMPanicInfoKey)) continue;
-
- tmpObject = _ofDict->getObject(tmpSymbol);
-
- length = maxLength;
- ok = convertObjectToProp(tmpBuffer, &length, tmpSymbol, tmpObject);
- if (ok) {
- tmpBuffer += length;
- maxLength -= length;
- }
- }
- iter->release();
-
- if (ok) {
- bcopy(buffer, _ofImage, _ofPartitionSize);
- }
-
- IODelete(buffer, UInt8, _ofPartitionSize);
-
- if (!ok) return kIOReturnBadArgument;
- } else {
- buffer = IONew(UInt8, _ofPartitionSize);
- if (buffer == 0) return kIOReturnNoMemory;
- bzero(buffer, _ofPartitionSize);
-
- owHeader = (OWVariablesHeader *)buffer;
- owHeaderOld = (OWVariablesHeader *)_ofImage;
-
- owHeader->owMagic = owHeaderOld->owMagic;
- owHeader->owVersion = owHeaderOld->owVersion;
- owHeader->owPages = owHeaderOld->owPages;
-
- curOffset = _ofPartitionSize;
-
- ok = true;
- cnt = 0;
- while (ok) {
- if (!getOWVariableInfo(cnt++, &tmpSymbol, &tmpType, &tmpOffset))
- break;
-
- tmpObject = _ofDict->getObject(tmpSymbol);
-
- switch (tmpType) {
- case kOFVariableTypeBoolean :
- tmpBoolean = OSDynamicCast(OSBoolean, tmpObject);
- if (tmpBoolean->getValue()) owHeader->owFlags |= tmpOffset;
- break;
-
- case kOFVariableTypeNumber :
- tmpNumber = OSDynamicCast(OSNumber, tmpObject);
- owHeader->owNumbers[tmpOffset] = tmpNumber->unsigned32BitValue();
- break;
-
- case kOFVariableTypeString :
- tmpString = OSDynamicCast(OSString, tmpObject);
- tmpData = (const UInt8 *)tmpString->getCStringNoCopy();
- tmpDataLength = tmpString->getLength();
-
- if ((curOffset - tmpDataLength) < sizeof(OWVariablesHeader)) {
- ok = false;
- break;
- }
-
- owHeader->owStrings[tmpOffset].length = tmpDataLength;
- curOffset -= tmpDataLength;
- owHeader->owStrings[tmpOffset].offset = curOffset + _ofPartitionOffset;
- if (tmpDataLength != 0)
- bcopy(tmpData, buffer + curOffset, tmpDataLength);
- break;
- }
- }
-
+
+ IOLockAssert(_ofLock, kIOLockAssertOwned);
+
+ if ((_ofImage == 0) || (_ofDict == 0) || _systemPaniced) return kIOReturnNotReady;
+
+ buffer = tmpBuffer = IONew(UInt8, _ofPartitionSize);
+ if (buffer == 0) return kIOReturnNoMemory;
+ bzero(buffer, _ofPartitionSize);
+
+ ok = true;
+ maxLength = _ofPartitionSize;
+
+ iter = OSCollectionIterator::withCollection(_ofDict);
+ if (iter == 0) ok = false;
+
+ while (ok) {
+ tmpSymbol = OSDynamicCast(OSSymbol, iter->getNextObject());
+ if (tmpSymbol == 0) break;
+
+ // Don't save 'aapl,panic-info'.
+ if (tmpSymbol->isEqualTo(kIODTNVRAMPanicInfoKey)) continue;
+
+ tmpObject = _ofDict->getObject(tmpSymbol);
+
+ length = maxLength;
+ ok = convertObjectToProp(tmpBuffer, &length, tmpSymbol, tmpObject);
if (ok) {
- owHeader->owHere = _ofPartitionOffset + sizeof(OWVariablesHeader);
- owHeader->owTop = _ofPartitionOffset + curOffset;
- owHeader->owNext = 0;
-
- owHeader->owChecksum = 0;
- owHeader->owChecksum = ~generateOWChecksum(buffer);
-
- bcopy(buffer, _ofImage, _ofPartitionSize);
+ tmpBuffer += length;
+ maxLength -= length;
}
-
- IODelete(buffer, UInt8, _ofPartitionSize);
-
- if (!ok) return kIOReturnBadArgument;
}
-
- _ofImageDirty = false;
- _nvramImageDirty = true;
-
- return kIOReturnSuccess;
+ iter->release();
+
+ if (ok) {
+ bcopy(buffer, _ofImage, _ofPartitionSize);
+ }
+
+ IODelete(buffer, UInt8, _ofPartitionSize);
+
+ if (!ok) return kIOReturnBadArgument;
+
+ if (_nvramController != 0) {
+ return _nvramController->write(0, _nvramImage, kIODTNVRAMImageSize);
+ }
+
+ return kIOReturnNotReady;
}
struct OFVariable {
kOWVariableOffsetString = 17
};
+static const
OFVariable gOFVariables[] = {
{"little-endian?", kOFVariableTypeBoolean, kOFVariablePermUserRead, 0},
{"real-mode?", kOFVariableTypeBoolean, kOFVariablePermUserRead, 1},
{"security-mode", kOFVariableTypeString, kOFVariablePermUserRead, -1},
{"security-password", kOFVariableTypeData, kOFVariablePermRootOnly, -1},
{"boot-image", kOFVariableTypeData, kOFVariablePermUserWrite, -1},
+ {"com.apple.System.fp-state", kOFVariableTypeData, kOFVariablePermKernelOnly, -1},
+#if CONFIG_EMBEDDED
+ {"backlight-level", kOFVariableTypeData, kOFVariablePermUserWrite, -1},
+ {"com.apple.System.sep.art", kOFVariableTypeData, kOFVariablePermKernelOnly, -1},
+ {"com.apple.System.boot-nonce", kOFVariableTypeString, kOFVariablePermKernelOnly, -1},
+ {"darkboot", kOFVariableTypeBoolean, kOFVariablePermUserWrite, -1},
+ {"acc-mb-ld-lifetime", kOFVariableTypeNumber, kOFVariablePermKernelOnly, -1},
+ {"acc-cm-override-charger-count", kOFVariableTypeNumber, kOFVariablePermKernelOnly, -1},
+ {"acc-cm-override-count", kOFVariableTypeNumber, kOFVariablePermKernelOnly, -1},
+ {"enter-tdm-mode", kOFVariableTypeBoolean, kOFVariablePermUserWrite, -1},
+#endif
{0, kOFVariableTypeData, kOFVariablePermUserRead, -1}
};
UInt32 IODTNVRAM::getOFVariableType(const OSSymbol *propSymbol) const
{
- OFVariable *ofVar;
+ const OFVariable *ofVar;
ofVar = gOFVariables;
while (1) {
UInt32 IODTNVRAM::getOFVariablePerm(const OSSymbol *propSymbol) const
{
- OFVariable *ofVar;
+ const OFVariable *ofVar;
ofVar = gOFVariables;
while (1) {
bool IODTNVRAM::getOWVariableInfo(UInt32 variableNumber, const OSSymbol **propSymbol,
UInt32 *propType, UInt32 *propOffset)
{
- OFVariable *ofVar;
+ const OFVariable *ofVar;
ofVar = gOFVariables;
while (1) {
const OSSymbol *propSymbol, OSObject *propObject)
{
const UInt8 *propName;
- UInt32 propNameLength, propDataLength;
+ UInt32 propNameLength, propDataLength, remaining;
UInt32 propType, tmpValue;
OSBoolean *tmpBoolean = 0;
OSNumber *tmpNumber = 0;
if ((propNameLength + propDataLength + 2) > *length) return false;
// Copy the property name equal sign.
- sprintf((char *)buffer, "%s=", propName);
- buffer += propNameLength + 1;
-
+ buffer += snprintf((char *)buffer, *length, "%s=", propName);
+ remaining = *length - propNameLength - 1;
+
switch (propType) {
case kOFVariableTypeBoolean :
if (tmpBoolean->getValue()) {
- strcpy((char *)buffer, "true");
+ strlcpy((char *)buffer, "true", remaining);
} else {
- strcpy((char *)buffer, "false");
+ strlcpy((char *)buffer, "false", remaining);
}
break;
case kOFVariableTypeNumber :
tmpValue = tmpNumber->unsigned32BitValue();
if (tmpValue == 0xFFFFFFFF) {
- strcpy((char *)buffer, "-1");
+ strlcpy((char *)buffer, "-1", remaining);
} else if (tmpValue < 1000) {
- sprintf((char *)buffer, "%ld", tmpValue);
+ snprintf((char *)buffer, remaining, "%d", (uint32_t)tmpValue);
} else {
- sprintf((char *)buffer, "0x%lx", tmpValue);
+ snprintf((char *)buffer, remaining, "0x%x", (uint32_t)tmpValue);
}
break;
case kOFVariableTypeString :
- strcpy((char *)buffer, tmpString->getCStringNoCopy());
+ strlcpy((char *)buffer, tmpString->getCStringNoCopy(), remaining);
break;
case kOFVariableTypeData :
tmpData = IONew(UInt8, tmpDataLength + 1);
if (tmpData == 0) return;
- strncpy((char *)tmpData, (const char *)bootCommandData, cnt);
- tmpData[cnt] = '\0';
- strcat((char *)tmpData, (const char *)bootArgsData);
+ cnt -= strlcpy((char *)tmpData, (const char *)bootCommandData, cnt);
+ strlcat((char *)tmpData, (const char *)bootArgsData, cnt);
bootCommand = OSString::withCString((const char *)tmpData);
if (bootCommand != 0) {
}
}
-
-// Private methods for Name Registry access.
-
-enum {
- kMaxNVNameLength = 4,
- kMaxNVDataLength = 8
-};
-
-#pragma options align=mac68k
-struct NVRAMProperty
-{
- IONVRAMDescriptor header;
- UInt8 nameLength;
- UInt8 name[ kMaxNVNameLength ];
- UInt8 dataLength;
- UInt8 data[ kMaxNVDataLength ];
-};
-#pragma options align=reset
-
bool IODTNVRAM::searchNVRAMProperty(IONVRAMDescriptor *hdr, UInt32 *where)
{
- UInt32 offset;
- SInt32 nvEnd;
-
- nvEnd = *((UInt16 *)_nrImage);
- if(getPlatform()->getBootROMType()) {
- // on NewWorld, offset to partition start
- nvEnd -= 0x100;
- } else {
- // on old world, absolute
- nvEnd -= _nrPartitionOffset;
- }
- if((nvEnd < 0) || (nvEnd >= kIODTNVRAMNameRegistrySize))
- nvEnd = 2;
-
- offset = 2;
- while ((offset + sizeof(NVRAMProperty)) <= (UInt32)nvEnd) {
- if (bcmp(_nrImage + offset, hdr, sizeof(*hdr)) == 0) {
- *where = offset;
- return true;
- }
- offset += sizeof(NVRAMProperty);
- }
-
- if ((nvEnd + sizeof(NVRAMProperty)) <= kIODTNVRAMNameRegistrySize)
- *where = nvEnd;
- else
- *where = 0;
-
return false;
}
const OSSymbol **name,
OSData **value)
{
- IONVRAMDescriptor hdr;
- NVRAMProperty *prop;
- IOByteCount length;
- UInt32 offset;
- IOReturn err;
- char nameBuf[kMaxNVNameLength + 1];
-
- if (_nrImage == 0) return kIOReturnUnsupported;
- if ((entry == 0) || (name == 0) || (value == 0)) return kIOReturnBadArgument;
-
- err = IODTMakeNVDescriptor(entry, &hdr);
- if (err != kIOReturnSuccess) return err;
-
- if (searchNVRAMProperty(&hdr, &offset)) {
- prop = (NVRAMProperty *)(_nrImage + offset);
-
- length = prop->nameLength;
- if (length > kMaxNVNameLength) length = kMaxNVNameLength;
- strncpy(nameBuf, (const char *)prop->name, length);
- nameBuf[length] = 0;
- *name = OSSymbol::withCString(nameBuf);
-
- length = prop->dataLength;
- if (length > kMaxNVDataLength) length = kMaxNVDataLength;
- *value = OSData::withBytes(prop->data, length);
-
- if ((*name != 0) && (*value != 0)) return kIOReturnSuccess;
- else return kIOReturnNoMemory;
- }
-
- return kIOReturnNoResources;
+ return kIOReturnUnsupported;
}
+
IOReturn IODTNVRAM::writeNVRAMPropertyType0(IORegistryEntry *entry,
const OSSymbol *name,
OSData *value)
{
- IONVRAMDescriptor hdr;
- NVRAMProperty *prop;
- IOByteCount nameLength;
- IOByteCount dataLength;
- UInt32 offset;
- IOReturn err;
- UInt16 nvLength;
- bool exists;
-
- if (_nrImage == 0) return kIOReturnUnsupported;
- if ((entry == 0) || (name == 0) || (value == 0)) return kIOReturnBadArgument;
-
- nameLength = name->getLength();
- dataLength = value->getLength();
- if (nameLength > kMaxNVNameLength) return kIOReturnNoSpace;
- if (dataLength > kMaxNVDataLength) return kIOReturnNoSpace;
-
- err = IODTMakeNVDescriptor(entry, &hdr);
- if (err != kIOReturnSuccess) return err;
-
- exists = searchNVRAMProperty(&hdr, &offset);
- if (offset == 0) return kIOReturnNoMemory;
-
- prop = (NVRAMProperty *)(_nrImage + offset);
- if (!exists) bcopy(&hdr, &prop->header, sizeof(hdr));
-
- prop->nameLength = nameLength;
- bcopy(name->getCStringNoCopy(), prop->name, nameLength);
- prop->dataLength = dataLength;
- bcopy(value->getBytesNoCopy(), prop->data, dataLength);
-
- if (!exists) {
- nvLength = offset + sizeof(NVRAMProperty);
- if (getPlatform()->getBootROMType())
- nvLength += 0x100;
- else
- nvLength += _nrPartitionOffset;
- *((UInt16 *)_nrImage) = nvLength;
- }
-
- _nvramImageDirty = true;
-
- return err;
+ return kIOReturnUnsupported;
}
+
OSData *IODTNVRAM::unescapeBytesToData(const UInt8 *bytes, UInt32 length)
{
OSData *data = 0;
UInt8 byte;
if (_ofDict == 0) return err;
+
+ IOLockLock(_ofLock);
data = OSDynamicCast(OSData, _ofDict->getObject(_registryPropertiesKey));
+ IOLockUnlock(_ofLock);
+
if (data == 0) return err;
startPtr = (const UInt8 *) data->getBytesNoCopy();
const OSSymbol *propName,
OSData *value)
{
- OSData *oldData;
+ OSData *oldData, *escapedData;
OSData *data = 0;
const UInt8 *startPtr;
const UInt8 *propStart;
// copy over existing properties for other entries
+ IOLockLock(_ofLock);
+
oldData = OSDynamicCast(OSData, _ofDict->getObject(_registryPropertiesKey));
if (oldData) {
+
startPtr = (const UInt8 *) oldData->getBytesNoCopy();
endPtr = startPtr + oldData->getLength();
-
+
propStart = startPtr;
wherePtr = startPtr;
while (wherePtr < endPtr) {
nvPath = 0;
nvName = 0;
}
-
+
startPtr = wherePtr;
}
}
data = OSData::withData(oldData);
else
data = OSData::withCapacity(16);
- if (!data)
- return kIOReturnNoMemory;
+ if (!data) ok = false;
}
- if (value && value->getLength()) {
- // get entries in path
- OSArray *array = OSArray::withCapacity(5);
- if (!array) {
- data->release();
- return kIOReturnNoMemory;
- }
- do
- array->setObject(entry);
- while ((entry = entry->getParentEntry(gIODTPlane)));
-
- // append path
- for (int i = array->getCount() - 3;
- (entry = (IORegistryEntry *) array->getObject(i));
- i--) {
-
- name = entry->getName(gIODTPlane);
- comp = entry->getLocation(gIODTPlane);
- if( comp && (0 == strcmp("pci", name))
- && (0 == strcmp("80000000", comp))) {
- // yosemite hack
- comp = "/pci@80000000";
- } else {
- if (comp)
- ok &= data->appendBytes("/@", 2);
- else {
- if (!name)
- continue;
- ok &= data->appendByte('/', 1);
- comp = name;
- }
- }
- ok &= data->appendBytes(comp, strlen(comp));
- }
- ok &= data->appendByte(0, 1);
- array->release();
-
- // append prop name
- ok &= data->appendBytes(propName->getCStringNoCopy(), propName->getLength() + 1);
-
- // append escaped data
- oldData = escapeDataToData(value);
- ok &= (oldData != 0);
- if (ok)
- ok &= data->appendBytes(oldData);
- }
+ if (ok && value && value->getLength()) do {
+ // get entries in path
+ OSArray *array = OSArray::withCapacity(5);
+ if (!array) {
+ ok = false;
+ break;
+ }
+ do
+ array->setObject(entry);
+ while ((entry = entry->getParentEntry(gIODTPlane)));
+
+ // append path
+ for (int i = array->getCount() - 3;
+ (entry = (IORegistryEntry *) array->getObject(i));
+ i--) {
+
+ name = entry->getName(gIODTPlane);
+ comp = entry->getLocation(gIODTPlane);
+ if (comp) ok &= data->appendBytes("/@", 2);
+ else {
+ if (!name) continue;
+ ok &= data->appendByte('/', 1);
+ comp = name;
+ }
+ ok &= data->appendBytes(comp, strlen(comp));
+ }
+ ok &= data->appendByte(0, 1);
+ array->release();
+
+ // append prop name
+ ok &= data->appendBytes(propName->getCStringNoCopy(), propName->getLength() + 1);
+
+ // append escaped data
+ escapedData = escapeDataToData(value);
+ ok &= (escapedData != 0);
+ if (ok) ok &= data->appendBytes(escapedData);
+
+ } while (false);
+
+ oldData->retain();
if (ok) {
ok = _ofDict->setObject(_registryPropertiesKey, data);
- if (ok)
- _ofImageDirty = true;
}
- data->release();
+
+ if (data) data->release();
+
+ if (ok) {
+ if (syncVariables() != kIOReturnSuccess) {
+ if (oldData) {
+ _ofDict->setObject(_registryPropertiesKey, oldData);
+ }
+ else {
+ _ofDict->removeObject(_registryPropertiesKey);
+ }
+ (void) syncVariables();
+ ok = false;
+ }
+ }
+
+ if (oldData) {
+ oldData->release();
+ }
+
+ IOLockUnlock(_ofLock);
return ok ? kIOReturnSuccess : kIOReturnNoMemory;
}
+
+bool IODTNVRAM::safeToSync(void)
+{
+ AbsoluteTime delta;
+ UInt64 delta_ns;
+ SInt32 delta_secs;
+
+ // delta interval went by
+ clock_get_uptime(&delta);
+
+ // Figure it in seconds.
+ absolutetime_to_nanoseconds(delta, &delta_ns);
+ delta_secs = (SInt32)(delta_ns / NSEC_PER_SEC);
+
+ if ((delta_secs > (_lastDeviceSync + MIN_SYNC_NOW_INTERVAL)) || _freshInterval)
+ {
+ _lastDeviceSync = delta_secs;
+ _freshInterval = FALSE;
+ return TRUE;
+ }
+
+ return FALSE;
+}
projects / apple / xnu.git / blobdiff