#include <IOKit/IOKitDebug.h>
#include <libkern/OSDebug.h>
+#include <libkern/OSKextLibPrivate.h>
#include "IOKitKernelInternal.h"
extern ppnum_t pmap_find_phys(pmap_t pmap, addr64_t va);
extern void ipc_port_release_send(ipc_port_t port);
-// osfmk/device/iokit_rpc.c
-unsigned int IODefaultCacheBits(addr64_t pa);
-unsigned int IOTranslateCacheBits(struct phys_entry *pp);
-
__END_DECLS
#define kIOMapperWaitSystem ((IOMapper *) 1)
#define DEBG(fmt, args...) {}
#endif
-#define IOMD_DEBUG_DMAACTIVE 1
-
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
// Some data structures and accessor macros used by the initWithOptions
uint64_t fPreparationID;
#if IOTRACKING
IOTracking fWireTracking;
- struct vm_tag_set fWireTags;
- struct vm_tag_set_entry fWireTagsEntries[kMaxWireTags];
#endif /* IOTRACKING */
unsigned int fPageCnt;
uint8_t fDMAMapNumAddressBits;
- vm_tag_t fAllocTag;
unsigned char fDiscontig:1;
unsigned char fCompletionError:1;
- unsigned char _resv:6;
+ unsigned char fMappedBaseValid:1;
+ unsigned char _resv:3;
+ unsigned char fDMAAccess:2;
/* variable length arrays */
upl_page_info_t fPageList[1]
#define computeDataSize(p, u) \
(offsetof(ioGMDData, fPageList) + p * sizeof(upl_page_info_t) + u * sizeof(ioPLBlock))
+enum { kIOMemoryHostOrRemote = kIOMemoryHostOnly | kIOMemoryRemote };
+
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
#define next_page(a) ( trunc_page(a) + PAGE_SIZE )
err = kIOReturnBadArgument;
break;
}
+
+ if (*control == VM_PURGABLE_SET_STATE) {
+ // let VM know this call is from the kernel and is allowed to alter
+ // the volatility of the memory entry even if it was created with
+ // MAP_MEM_PURGABLE_KERNEL_ONLY
+ *control = VM_PURGABLE_SET_STATE_FROM_KERNEL;
+ }
+
return (err);
}
SET_MAP_MEM(MAP_MEM_INNERWBACK, prot);
break;
+ case kIOPostedWrite:
+ SET_MAP_MEM(MAP_MEM_POSTED, prot);
+ break;
+
case kIODefaultCache:
default:
SET_MAP_MEM(MAP_MEM_NOOP, prot);
pagerFlags = DEVICE_PAGER_COHERENT;
break;
+ case kIOPostedWrite:
+ pagerFlags = DEVICE_PAGER_CACHE_INHIB | DEVICE_PAGER_COHERENT | DEVICE_PAGER_GUARDED | DEVICE_PAGER_EARLY_ACK;
+ break;
+
case kIODefaultCache:
default:
pagerFlags = -1U;
struct IOMemoryReference
{
- volatile SInt32 refCount;
- vm_prot_t prot;
- uint32_t capacity;
- uint32_t count;
- IOMemoryEntry entries[0];
+ volatile SInt32 refCount;
+ vm_prot_t prot;
+ uint32_t capacity;
+ uint32_t count;
+ struct IOMemoryReference * mapRef;
+ IOMemoryEntry entries[0];
};
enum
{
kIOMemoryReferenceReuse = 0x00000001,
kIOMemoryReferenceWrite = 0x00000002,
+ kIOMemoryReferenceCOW = 0x00000004,
};
SInt32 gIOMemoryReferenceCount;
IOMemoryEntry * entries;
size_t size;
+ if (ref->mapRef)
+ {
+ memoryReferenceFree(ref->mapRef);
+ ref->mapRef = 0;
+ }
+
entries = ref->entries + ref->count;
while (entries > &ref->entries[0])
{
tag = getVMTag(kernel_map);
entries = &ref->entries[0];
count = 0;
+ err = KERN_SUCCESS;
offset = 0;
rangeIdx = 0;
- if (_task) getAddrLenForInd(nextAddr, nextLen, type, _ranges, rangeIdx);
+ if (_task)
+ {
+ getAddrLenForInd(nextAddr, nextLen, type, _ranges, rangeIdx);
+ }
else
{
nextAddr = getPhysicalSegment(offset, &physLen, kIOMemoryMapperNone);
pagerFlags = IODefaultCacheBits(nextAddr);
if (DEVICE_PAGER_CACHE_INHIB & pagerFlags)
{
- if (DEVICE_PAGER_GUARDED & pagerFlags)
+ if (DEVICE_PAGER_EARLY_ACK & pagerFlags)
+ mode = kIOPostedWrite;
+ else if (DEVICE_PAGER_GUARDED & pagerFlags)
mode = kIOInhibitCache;
else
mode = kIOWriteCombineCache;
if (kIODefaultCache != cacheMode) prot |= VM_PROT_WRITE;
if (kIODirectionOut != (kIODirectionOutIn & _flags)) prot |= VM_PROT_WRITE;
if (kIOMemoryReferenceWrite & options) prot |= VM_PROT_WRITE;
+ if (kIOMemoryReferenceCOW & options) prot |= MAP_MEM_VM_COPY;
if ((kIOMemoryReferenceReuse & options) && _memRef)
{
{
// IOBufferMemoryDescriptor alloc - set flags for entry + object create
prot |= MAP_MEM_NAMED_CREATE;
- if (kIOMemoryBufferPurgeable & _flags) prot |= MAP_MEM_PURGABLE;
+ if (kIOMemoryBufferPurgeable & _flags)
+ {
+ prot |= (MAP_MEM_PURGABLE | MAP_MEM_PURGABLE_KERNEL_ONLY);
+ if (VM_KERN_MEMORY_SKYWALK == tag)
+ {
+ prot |= MAP_MEM_LEDGER_TAG_NETWORK;
+ }
+ }
if (kIOMemoryUseReserve & _flags) prot |= MAP_MEM_GRAB_SECLUDED;
prot |= VM_PROT_WRITE;
else prot &= ~MAP_MEM_NAMED_REUSE;
}
- err = mach_make_memory_entry_64(map,
+ err = mach_make_memory_entry_internal(map,
&actualSize, entryAddr, prot, &entry, cloneEntry);
if (KERN_SUCCESS != err) break;
ref->count = count;
ref->prot = prot;
+ if (_task && (KERN_SUCCESS == err)
+ && (kIOMemoryMapCopyOnWrite & _flags)
+ && !(kIOMemoryReferenceCOW & options))
+ {
+ err = memoryReferenceCreate(options | kIOMemoryReferenceCOW, &ref->mapRef);
+ }
+
if (KERN_SUCCESS == err)
{
if (MAP_MEM_NAMED_REUSE & prot)
(vm_map_offset_t) 0,
(((ref->options & kIOMapAnywhere)
? VM_FLAGS_ANYWHERE
- : VM_FLAGS_FIXED)
- | VM_MAKE_TAG(ref->tag)),
+ : VM_FLAGS_FIXED)),
+ VM_MAP_KERNEL_FLAGS_NONE,
+ ref->tag,
IPC_PORT_NULL,
(memory_object_offset_t) 0,
false, /* copy */
IOOptionBits type;
IOOptionBits cacheMode;
vm_tag_t tag;
+ // for the kIOMapPrefault option.
+ upl_page_info_t * pageList = NULL;
+ UInt currentPageIndex = 0;
+ bool didAlloc;
- /*
- * For the kIOMapPrefault option.
- */
- upl_page_info_t *pageList = NULL;
- UInt currentPageIndex = 0;
+ if (ref->mapRef)
+ {
+ err = memoryReferenceMap(ref->mapRef, map, inoffset, size, options, inaddr);
+ return (err);
+ }
type = _flags & kIOMemoryTypeMask;
+
prot = VM_PROT_READ;
if (!(kIOMapReadOnly & options)) prot |= VM_PROT_WRITE;
prot &= ref->prot;
nextAddr += remain;
nextLen -= remain;
pageOffset = (page_mask & nextAddr);
- addr = 0;
+ addr = 0;
+ didAlloc = false;
+
if (!(options & kIOMapAnywhere))
{
addr = *inaddr;
err = IOMemoryDescriptorMapAlloc(ref.map, &ref);
if (KERN_SUCCESS == err)
{
- addr = ref.mapped;
- map = ref.map;
+ addr = ref.mapped;
+ map = ref.map;
+ didAlloc = true;
}
}
+ /*
+ * If the memory is associated with a device pager but doesn't have a UPL,
+ * it will be immediately faulted in through the pager via populateDevicePager().
+ * kIOMapPrefault is redundant in that case, so don't try to use it for UPL
+ * operations.
+ */
+ if ((reserved != NULL) && (reserved->dp.devicePager) && (_wireCount != 0))
+ options &= ~kIOMapPrefault;
+
/*
* Prefaulting is only possible if we wired the memory earlier. Check the
* memory type, and the underlying data.
* The memory must have been wired by calling ::prepare(), otherwise
* we don't have the UPL. Without UPLs, pages cannot be pre-faulted
*/
- assert(map != kernel_map);
assert(_wireCount != 0);
assert(_memoryEntries != NULL);
- if ((map == kernel_map) ||
- (_wireCount == 0) ||
+ if ((_wireCount == 0) ||
(_memoryEntries == NULL))
{
return kIOReturnBadArgument;
chunk = entry->size - entryOffset;
if (chunk)
{
+ vm_map_kernel_flags_t vmk_flags;
+
+ vmk_flags = VM_MAP_KERNEL_FLAGS_NONE;
+ vmk_flags.vmkf_iokit_acct = TRUE; /* iokit accounting */
+
if (chunk > remain) chunk = remain;
if (options & kIOMapPrefault)
{
UInt nb_pages = round_page(chunk) / PAGE_SIZE;
+
err = vm_map_enter_mem_object_prefault(map,
&mapAddr,
chunk, 0 /* mask */,
- (VM_FLAGS_FIXED
- | VM_FLAGS_OVERWRITE
- | VM_MAKE_TAG(tag)
- | VM_FLAGS_IOKIT_ACCT), /* iokit accounting */
+ (VM_FLAGS_FIXED
+ | VM_FLAGS_OVERWRITE),
+ vmk_flags,
+ tag,
entry->entry,
entryOffset,
prot, // cur
&mapAddr,
chunk, 0 /* mask */,
(VM_FLAGS_FIXED
- | VM_FLAGS_OVERWRITE
- | VM_MAKE_TAG(tag)
- | VM_FLAGS_IOKIT_ACCT), /* iokit accounting */
+ | VM_FLAGS_OVERWRITE),
+ vmk_flags,
+ tag,
entry->entry,
entryOffset,
false, // copy
}
}
- if ((KERN_SUCCESS != err) && addr && !(kIOMapOverwrite & options))
+ if ((KERN_SUCCESS != err) && didAlloc)
{
(void) mach_vm_deallocate(map, trunc_page_64(addr), size);
addr = 0;
err = purgeableControlBits(newState, &control, &state);
if (KERN_SUCCESS != err) break;
- err = mach_memory_entry_purgable_control(entries->entry, control, &state);
+ err = memory_entry_purgeable_control_internal(entries->entry, control, &state);
if (KERN_SUCCESS != err) break;
err = purgeableStateBits(&state);
if (KERN_SUCCESS != err) break;
}
// Grab the appropriate mapper
- if (kIOMemoryHostOnly & options) options |= kIOMemoryMapperNone;
+ if (kIOMemoryHostOrRemote & options) options |= kIOMemoryMapperNone;
if (kIOMemoryMapperNone & options)
mapper = 0; // No Mapper
else if (mapper == kIOMapperSystem) {
gIOSystemMapper = mapper = IOMapper::gSystem;
}
- // Temp binary compatibility for kIOMemoryThreadSafe
- if (kIOMemoryReserved6156215 & options)
- {
- options &= ~kIOMemoryReserved6156215;
- options |= kIOMemoryThreadSafe;
- }
// Remove the dynamic internal use flags from the initial setting
options &= ~(kIOMemoryPreparedReadOnly);
_flags = options;
_direction = (IODirection) (_flags & kIOMemoryDirectionMask);
#endif /* !__LP64__ */
+ _dmaReferences = 0;
__iomd_reservedA = 0;
__iomd_reservedB = 0;
_highestPage = 0;
if (!initMemoryEntries(dataSize, mapper)) return (false);
dataP = getDataP(_memoryEntries);
dataP->fPageCnt = 0;
-
+ switch (kIOMemoryDirectionMask & options)
+ {
+ case kIODirectionOut:
+ dataP->fDMAAccess = kIODMAMapReadAccess;
+ break;
+ case kIODirectionIn:
+ dataP->fDMAAccess = kIODMAMapWriteAccess;
+ break;
+ case kIODirectionNone:
+ case kIODirectionOutIn:
+ default:
+ panic("bad dir for upl 0x%x\n", (int) options);
+ break;
+ }
// _wireCount++; // UPLs start out life wired
_length = count;
case kIOMemoryTypeVirtual64:
case kIOMemoryTypePhysical64:
if (count == 1
+#ifndef __arm__
&& (((IOAddressRange *) buffers)->address + ((IOAddressRange *) buffers)->length) <= 0x100000000ULL
+#endif
) {
if (kIOMemoryTypeVirtual64 == type)
type = kIOMemoryTypeVirtual;
break;
}
}
+ _rangesCount = count;
// Find starting address within the vector of ranges
Ranges vec = _ranges;
_length = totalLength;
_pages = pages;
- _rangesCount = count;
// Auto-prepare memory at creation time.
// Implied completion when descriptor is free-ed
+
+
if ((kIOMemoryTypePhysical == type) || (kIOMemoryTypePhysical64 == type))
_wireCount++; // Physical MDs are, by definition, wired
else { /* kIOMemoryTypeVirtual | kIOMemoryTypeVirtual64 | kIOMemoryTypeUIO */
dataP = getDataP(_memoryEntries);
dataP->fPageCnt = _pages;
+ if (((_task != kernel_task) || (kIOMemoryBufferPageable & _flags))
+ && (VM_KERN_MEMORY_NONE == _kernelTag))
+ {
+ _kernelTag = IOMemoryTag(kernel_map);
+ if (_kernelTag == gIOSurfaceTag) _userTag = VM_MEMORY_IOSURFACE;
+ }
+
if ( (kIOMemoryPersistent & _flags) && !_memRef)
{
IOReturn
if ((kIOMemoryTypePhysical == type) || (kIOMemoryTypePhysical64 == type))
{
ioGMDData * dataP;
- if (_memoryEntries && (dataP = getDataP(_memoryEntries)) && dataP->fMappedBase)
+ if (_memoryEntries && (dataP = getDataP(_memoryEntries)) && dataP->fMappedBaseValid)
{
- dataP->fMapper->iovmUnmapMemory(this, NULL, dataP->fMappedBase, dataP->fMappedLength);
- dataP->fMappedBase = 0;
+ dmaUnmap(dataP->fMapper, NULL, 0, dataP->fMappedBase, dataP->fMappedLength);
+ dataP->fMappedBaseValid = dataP->fMappedBase = 0;
}
}
else
return( _tag);
}
+uint64_t IOMemoryDescriptor::getFlags(void)
+{
+ return (_flags);
+}
+
#ifndef __LP64__
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wdeprecated-declarations"
return 0;
}
+ assert (!(kIOMemoryRemote & _flags));
+ if (kIOMemoryRemote & _flags) return (0);
+
if (kIOMemoryThreadSafe & _flags)
LOCK;
return 0;
}
+ assert (!(kIOMemoryRemote & _flags));
+ if (kIOMemoryRemote & _flags) return (0);
+
if (kIOMemoryThreadSafe & _flags)
LOCK;
assert(!remaining);
+#if defined(__x86_64__)
+ // copypv does not cppvFsnk on intel
+#else
if (!srcAddr) performOperation(kIOMemoryIncoherentIOFlush, inoffset, length);
+#endif
return length - remaining;
}
void IOMemoryDescriptor::setVMTags(vm_tag_t kernelTag, vm_tag_t userTag)
{
- if (!getKernelReserved()) return;
- reserved->kernelTag = kernelTag;
- reserved->userTag = userTag;
+ _kernelTag = kernelTag;
+ _userTag = userTag;
}
vm_tag_t IOMemoryDescriptor::getVMTag(vm_map_t map)
{
- if (!reserved
- || (VM_KERN_MEMORY_NONE == reserved->kernelTag)
- || (VM_KERN_MEMORY_NONE == reserved->userTag))
+ if (vm_kernel_map_is_kernel(map))
{
- return (IOMemoryTag(map));
+ if (VM_KERN_MEMORY_NONE != _kernelTag) return (_kernelTag);
}
-
- if (vm_kernel_map_is_kernel(map)) return (reserved->kernelTag);
- return (reserved->userTag);
+ else
+ {
+ if (VM_KERN_MEMORY_NONE != _userTag) return (_userTag);
+ }
+ return (IOMemoryTag(map));
}
IOReturn IOGeneralMemoryDescriptor::dmaCommandOperation(DMACommandOps op, void *vData, UInt dataSize) const
keepMap = (data->fMapper == gIOSystemMapper);
keepMap &= ((data->fOffset == 0) && (data->fLength == _length));
+ if ((data->fMapper == gIOSystemMapper) && _prepareLock) IOLockLock(_prepareLock);
+
remap = (!keepMap);
remap |= (dataP->fDMAMapNumAddressBits < 64)
&& ((dataP->fMappedBase + _length) > (1ULL << dataP->fDMAMapNumAddressBits));
remap |= (dataP->fDMAMapAlignment > page_size);
- if (remap || !dataP->fMappedBase)
+ if (remap || !dataP->fMappedBaseValid)
{
-// if (dataP->fMappedBase) OSReportWithBacktrace("kIOMDDMAMap whole %d remap %d params %d\n", whole, remap, params);
+// if (dataP->fMappedBaseValid) OSReportWithBacktrace("kIOMDDMAMap whole %d remap %d params %d\n", whole, remap, params);
err = md->dmaMap(data->fMapper, data->fCommand, &data->fMapSpec, data->fOffset, data->fLength, &data->fAlloc, &data->fAllocLength);
- if (keepMap && (kIOReturnSuccess == err) && !dataP->fMappedBase)
+ if (keepMap && (kIOReturnSuccess == err) && !dataP->fMappedBaseValid)
{
- dataP->fMappedBase = data->fAlloc;
- dataP->fMappedLength = data->fAllocLength;
- data->fAllocLength = 0; // IOMD owns the alloc now
+ dataP->fMappedBase = data->fAlloc;
+ dataP->fMappedBaseValid = true;
+ dataP->fMappedLength = data->fAllocLength;
+ data->fAllocLength = 0; // IOMD owns the alloc now
}
}
else
{
data->fAlloc = dataP->fMappedBase;
data->fAllocLength = 0; // give out IOMD map
+ md->dmaMapRecord(data->fMapper, data->fCommand, dataP->fMappedLength);
}
data->fMapContig = !dataP->fDiscontig;
- }
+ if ((data->fMapper == gIOSystemMapper) && _prepareLock) IOLockUnlock(_prepareLock);
+ }
return (err);
}
+ if (kIOMDDMAUnmap == op)
+ {
+ if (dataSize < sizeof(IOMDDMAMapArgs))
+ return kIOReturnUnderrun;
+ IOMDDMAMapArgs * data = (IOMDDMAMapArgs *) vData;
+
+ err = md->dmaUnmap(data->fMapper, data->fCommand, data->fOffset, data->fAlloc, data->fAllocLength);
+
+ return kIOReturnSuccess;
+ }
if (kIOMDAddDMAMapSpec == op)
{
}
}
- return kIOReturnSuccess;
+ return kIOReturnSuccess;
+ }
- } else if (kIOMDWalkSegments != op)
+ else if (kIOMDDMAActive == op)
+ {
+ if (params)
+ {
+ int16_t prior;
+ prior = OSAddAtomic16(1, &md->_dmaReferences);
+ if (!prior) md->_mapName = NULL;
+ }
+ else
+ {
+ if (md->_dmaReferences) OSAddAtomic16(-1, &md->_dmaReferences);
+ else panic("_dmaReferences underflow");
+ }
+ }
+ else if (kIOMDWalkSegments != op)
return kIOReturnBadArgument;
// Get the next segment
isP = (InternalState *) vData;
UInt offset = isP->fIO.fOffset;
- bool mapped = isP->fIO.fMapped;
+ uint8_t mapped = isP->fIO.fMapped;
+ uint64_t mappedBase;
+
+ if (mapped && (kIOMemoryRemote & _flags)) return (kIOReturnNotAttached);
if (IOMapper::gSystem && mapped
&& (!(kIOMemoryHostOnly & _flags))
- && (!_memoryEntries || !getDataP(_memoryEntries)->fMappedBase))
-// && (_memoryEntries && !getDataP(_memoryEntries)->fMappedBase))
+ && (!_memoryEntries || !getDataP(_memoryEntries)->fMappedBaseValid))
+// && (_memoryEntries && !getDataP(_memoryEntries)->fMappedBaseValid))
{
if (!_memoryEntries
&& !md->initMemoryEntries(computeDataSize(0, 0), kIOMapperWaitSystem)) return (kIOReturnNoMemory);
mapSpec.alignment = dataP->fDMAMapAlignment;
err = md->dmaMap(dataP->fMapper, NULL, &mapSpec, 0, _length, &dataP->fMappedBase, &dataP->fMappedLength);
if (kIOReturnSuccess != err) return (err);
+ dataP->fMappedBaseValid = true;
}
}
+ if (kIOMDDMAWalkMappedLocal == mapped) mappedBase = isP->fIO.fMappedBase;
+ else if (mapped)
+ {
+ if (IOMapper::gSystem
+ && (!(kIOMemoryHostOnly & _flags))
+ && _memoryEntries
+ && (dataP = getDataP(_memoryEntries))
+ && dataP->fMappedBaseValid)
+ {
+ mappedBase = dataP->fMappedBase;
+ }
+ else mapped = 0;
+ }
+
if (offset >= _length)
return (offset == _length)? kIOReturnOverrun : kIOReturnInternalError;
UInt length;
UInt64 address;
-
if ( (_flags & kIOMemoryTypeMask) == kIOMemoryTypePhysical) {
// Physical address based memory descriptor
length = off2Ind - offset;
address = physP[ind - 1].address + len - length;
- if (true && mapped && _memoryEntries
- && (dataP = getDataP(_memoryEntries)) && dataP->fMappedBase)
+ if (true && mapped)
{
- address = dataP->fMappedBase + offset;
+ address = mappedBase + offset;
}
else
{
length = off2Ind - offset;
address = physP[ind - 1].address + len - length;
- if (true && mapped && _memoryEntries
- && (dataP = getDataP(_memoryEntries)) && dataP->fMappedBase)
+ if (true && mapped)
{
- address = dataP->fMappedBase + offset;
+ address = mappedBase + offset;
}
else
{
// If a mapped address is requested and this is a pre-mapped IOPL
// then just need to compute an offset relative to the mapped base.
- if (mapped && dataP->fMappedBase) {
+ if (mapped) {
offset += (ioplInfo.fPageOffset & PAGE_MASK);
- address = trunc_page_64(dataP->fMappedBase) + ptoa_64(ioplInfo.fMappedPage) + offset;
+ address = trunc_page_64(mappedBase) + ptoa_64(ioplInfo.fMappedPage) + offset;
continue; // Done leave do/while(false) now
}
state->fOffset = offset;
state->fLength = _length - offset;
- state->fMapped = (0 == (options & kIOMemoryMapperNone)) && !(_flags & kIOMemoryHostOnly);
+ state->fMapped = (0 == (options & kIOMemoryMapperNone)) && !(_flags & kIOMemoryHostOrRemote);
ret = dmaCommandOperation(kIOMDFirstSegment, _state, sizeof(_state));
data->fMapContig = true;
err = md->dmaMap(data->fMapper, data->fCommand, &data->fMapSpec, data->fOffset, data->fLength, &data->fAlloc, &data->fAllocLength);
+
return (err);
}
+ else if (kIOMDDMAUnmap == op)
+ {
+ if (dataSize < sizeof(IOMDDMAMapArgs))
+ return kIOReturnUnderrun;
+ IOMDDMAMapArgs * data = (IOMDDMAMapArgs *) vData;
+
+ err = md->dmaUnmap(data->fMapper, data->fCommand, data->fOffset, data->fAlloc, data->fAllocLength);
+
+ return (kIOReturnSuccess);
+ }
else return kIOReturnBadArgument;
return kIOReturnSuccess;
vm_purgable_t control;
int state;
+ assert (!(kIOMemoryRemote & _flags));
+ if (kIOMemoryRemote & _flags) return (kIOReturnNotAttached);
+
if (_memRef)
{
err = super::setPurgeable(newState, oldState);
break;
}
else
+ {
curMap = get_task_map(_task);
+ if (NULL == curMap)
+ {
+ err = KERN_INVALID_ARGUMENT;
+ break;
+ }
+ }
// can only do one range
Ranges vec = _ranges;
err = purgeableControlBits(newState, &control, &state);
if (kIOReturnSuccess != err)
break;
- err = mach_vm_purgable_control(curMap, addr, control, &state);
+ err = vm_map_purgable_control(curMap, addr, control, &state);
if (oldState)
{
if (kIOReturnSuccess == err)
{
IOReturn err = kIOReturnNotReady;
+ assert (!(kIOMemoryRemote & _flags));
+ if (kIOMemoryRemote & _flags) return (kIOReturnNotAttached);
+
if (kIOMemoryThreadSafe & _flags) LOCK;
if (_memRef) err = IOGeneralMemoryDescriptor::memoryReferenceGetPageCounts(_memRef, residentPageCount, dirtyPageCount);
else
}
+#if defined(__arm__) || defined(__arm64__)
+extern "C" void dcache_incoherent_io_flush64(addr64_t pa, unsigned int count, unsigned int remaining, unsigned int *res);
+extern "C" void dcache_incoherent_io_store64(addr64_t pa, unsigned int count, unsigned int remaining, unsigned int *res);
+#else /* defined(__arm__) || defined(__arm64__) */
extern "C" void dcache_incoherent_io_flush64(addr64_t pa, unsigned int count);
extern "C" void dcache_incoherent_io_store64(addr64_t pa, unsigned int count);
+#endif /* defined(__arm__) || defined(__arm64__) */
static void SetEncryptOp(addr64_t pa, unsigned int count)
{
IOByteCount remaining;
unsigned int res;
void (*func)(addr64_t pa, unsigned int count) = 0;
+#if defined(__arm__) || defined(__arm64__)
+ void (*func_ext)(addr64_t pa, unsigned int count, unsigned int remaining, unsigned int *result) = 0;
+#endif
+
+ assert (!(kIOMemoryRemote & _flags));
+ if (kIOMemoryRemote & _flags) return (kIOReturnNotAttached);
switch (options)
{
case kIOMemoryIncoherentIOFlush:
+#if defined(__arm__) || defined(__arm64__)
+ func_ext = &dcache_incoherent_io_flush64;
+#if __ARM_COHERENT_IO__
+ func_ext(0, 0, 0, &res);
+ return kIOReturnSuccess;
+#else /* __ARM_COHERENT_IO__ */
+ break;
+#endif /* __ARM_COHERENT_IO__ */
+#else /* defined(__arm__) || defined(__arm64__) */
func = &dcache_incoherent_io_flush64;
break;
+#endif /* defined(__arm__) || defined(__arm64__) */
case kIOMemoryIncoherentIOStore:
+#if defined(__arm__) || defined(__arm64__)
+ func_ext = &dcache_incoherent_io_store64;
+#if __ARM_COHERENT_IO__
+ func_ext(0, 0, 0, &res);
+ return kIOReturnSuccess;
+#else /* __ARM_COHERENT_IO__ */
+ break;
+#endif /* __ARM_COHERENT_IO__ */
+#else /* defined(__arm__) || defined(__arm64__) */
func = &dcache_incoherent_io_store64;
break;
+#endif /* defined(__arm__) || defined(__arm64__) */
case kIOMemorySetEncrypted:
func = &SetEncryptOp;
break;
}
+#if defined(__arm__) || defined(__arm64__)
+ if ((func == 0) && (func_ext == 0))
+ return (kIOReturnUnsupported);
+#else /* defined(__arm__) || defined(__arm64__) */
if (!func)
return (kIOReturnUnsupported);
+#endif /* defined(__arm__) || defined(__arm64__) */
if (kIOMemoryThreadSafe & _flags)
LOCK;
if (dstLen > remaining)
dstLen = remaining;
+#if defined(__arm__) || defined(__arm64__)
+ if (func)
+ (*func)(dstAddr64, dstLen);
+ if (func_ext) {
+ (*func_ext)(dstAddr64, dstLen, remaining, &res);
+ if (res != 0x0UL) {
+ remaining = 0;
+ break;
+ }
+ }
+#else /* defined(__arm__) || defined(__arm64__) */
(*func)(dstAddr64, dstLen);
+#endif /* defined(__arm__) || defined(__arm64__) */
offset += dstLen;
remaining -= dstLen;
#define io_kernel_static_start vm_kernel_stext
#define io_kernel_static_end vm_kernel_etext
+#elif defined(__arm__) || defined(__arm64__)
+
+extern vm_offset_t static_memory_end;
+
+#if defined(__arm64__)
+#define io_kernel_static_start vm_kext_base
+#else /* defined(__arm64__) */
+#define io_kernel_static_start vm_kernel_stext
+#endif /* defined(__arm64__) */
+
+#define io_kernel_static_end static_memory_end
+
#else
#error io_kernel_static_end is undefined for this architecture
#endif
return ((page >= pageCount) ? kIOReturnSuccess : kIOReturnVMError);
}
-/*
- *
- */
-#if IOTRACKING
-static void
-IOMemoryDescriptorUpdateWireOwner(ioGMDData * dataP, OSData * memoryEntries, vm_tag_t tag)
-{
- ioPLBlock *ioplList;
- UInt ind, count;
- vm_tag_t prior;
-
- count = getNumIOPL(memoryEntries, dataP);
- if (!count) return;
- ioplList = getIOPLList(dataP);
-
- if (VM_KERN_MEMORY_NONE == tag) tag = dataP->fAllocTag;
- assert(VM_KERN_MEMORY_NONE != tag);
-
- for (ind = 0; ind < count; ind++)
- {
- if (!ioplList[ind].fIOPL) continue;
- prior = iopl_set_tag(ioplList[ind].fIOPL, tag);
- if (VM_KERN_MEMORY_NONE == dataP->fAllocTag) dataP->fAllocTag = prior;
-#if 0
- if (tag != prior)
- {
- char name[2][48];
- vm_tag_get_kext(prior, &name[0][0], sizeof(name[0]));
- vm_tag_get_kext(tag, &name[1][0], sizeof(name[1]));
- IOLog("switched %48s to %48s\n", name[0], name[1]);
- }
-#endif
- }
-}
-#endif /* IOTRACKING */
-
-
IOReturn IOGeneralMemoryDescriptor::wireVirtual(IODirection forDirection)
{
IOOptionBits type = _flags & kIOMemoryTypeMask;
ioGMDData *dataP;
upl_page_info_array_t pageInfo;
ppnum_t mapBase;
+ vm_tag_t tag = VM_KERN_MEMORY_NONE;
assert(kIOMemoryTypeVirtual == type || kIOMemoryTypeVirtual64 == type || kIOMemoryTypeUIO == type);
if ((kIODirectionOutIn & forDirection) == kIODirectionNone)
forDirection = (IODirection) (forDirection | getDirection());
+ dataP = getDataP(_memoryEntries);
upl_control_flags_t uplFlags; // This Mem Desc's default flags for upl creation
switch (kIODirectionOutIn & forDirection)
{
- case kIODirectionOut:
- // Pages do not need to be marked as dirty on commit
- uplFlags = UPL_COPYOUT_FROM;
- break;
+ case kIODirectionOut:
+ // Pages do not need to be marked as dirty on commit
+ uplFlags = UPL_COPYOUT_FROM;
+ dataP->fDMAAccess = kIODMAMapReadAccess;
+ break;
- case kIODirectionIn:
- default:
- uplFlags = 0; // i.e. ~UPL_COPYOUT_FROM
- break;
- }
- dataP = getDataP(_memoryEntries);
+ case kIODirectionIn:
+ dataP->fDMAAccess = kIODMAMapWriteAccess;
+ uplFlags = 0; // i.e. ~UPL_COPYOUT_FROM
+ break;
- if (kIODirectionDMACommand & forDirection) assert(_wireCount);
+ default:
+ dataP->fDMAAccess = kIODMAMapReadAccess | kIODMAMapWriteAccess;
+ uplFlags = 0; // i.e. ~UPL_COPYOUT_FROM
+ break;
+ }
if (_wireCount)
{
else
{
IOMapper *mapper;
+
mapper = dataP->fMapper;
- dataP->fMappedBase = 0;
+ dataP->fMappedBaseValid = dataP->fMappedBase = 0;
uplFlags |= UPL_SET_IO_WIRE | UPL_SET_LITE;
- uplFlags |= UPL_MEMORY_TAG_MAKE(getVMTag(kernel_map));
+ tag = _kernelTag;
+ if (VM_KERN_MEMORY_NONE == tag) tag = IOMemoryTag(kernel_map);
if (kIODirectionPrepareToPhys32 & forDirection)
{
for (UInt range = 0; range < _rangesCount; range++) {
ioPLBlock iopl;
- mach_vm_address_t startPage;
+ mach_vm_address_t startPage, startPageOffset;
mach_vm_size_t numBytes;
ppnum_t highPage = 0;
// Get the startPage address and length of vec[range]
getAddrLenForInd(startPage, numBytes, type, vec, range);
- iopl.fPageOffset = startPage & PAGE_MASK;
- numBytes += iopl.fPageOffset;
+ startPageOffset = startPage & PAGE_MASK;
+ iopl.fPageOffset = startPageOffset;
+ numBytes += startPageOffset;
startPage = trunc_page_64(startPage);
if (mapper)
&iopl.fIOPL,
baseInfo,
&numPageInfo,
- &ioplFlags);
+ &ioplFlags,
+ tag);
}
else {
assert(theMap);
&iopl.fIOPL,
baseInfo,
&numPageInfo,
- &ioplFlags);
+ &ioplFlags,
+ tag);
}
if (error != KERN_SUCCESS) goto abortExit;
iopl.fIOMDOffset = mdOffset;
iopl.fPageInfo = pageIndex;
- if (mapper && pageIndex && (page_mask & (mdOffset + iopl.fPageOffset))) dataP->fDiscontig = true;
+ if (mapper && pageIndex && (page_mask & (mdOffset + startPageOffset))) dataP->fDiscontig = true;
if (!_memoryEntries->appendBytes(&iopl, sizeof(iopl))) {
// Clean up partial created and unsaved iopl
}
#if IOTRACKING
- if (kIOReturnSuccess == error)
+ if (!(_flags & kIOMemoryAutoPrepare) && (kIOReturnSuccess == error))
{
- vm_tag_t tag;
-
- dataP = getDataP(_memoryEntries);
- if (forDirection & kIODirectionDMACommand) tag = (forDirection & kIODirectionDMACommandMask) >> kIODirectionDMACommandShift;
- else tag = IOMemoryTag(kernel_map);
-
- if (!_wireCount) vm_tag_set_init(&dataP->fWireTags, kMaxWireTags);
- vm_tag_set_enter(&dataP->fWireTags, kMaxWireTags, tag);
-
- IOMemoryDescriptorUpdateWireOwner(dataP, _memoryEntries, tag);
- if (!_wireCount)
- {
- //if (!(_flags & kIOMemoryAutoPrepare))
- IOTrackingAdd(gIOWireTracking, &dataP->fWireTracking, ptoa(_pages), false);
- }
+ dataP = getDataP(_memoryEntries);
+ if (!dataP->fWireTracking.link.next)
+ {
+ IOTrackingAdd(gIOWireTracking, &dataP->fWireTracking, ptoa(_pages), false, tag);
+ }
}
#endif /* IOTRACKING */
dataP->fPreparationID = kIOPreparationIDUnprepared;
dataP->fDiscontig = false;
dataP->fCompletionError = false;
+ dataP->fMappedBaseValid = false;
return (true);
}
uint64_t * mapAddress,
uint64_t * mapLength)
{
- IOReturn ret;
+ IOReturn err;
uint32_t mapOptions;
mapOptions = 0;
mapOptions |= kIODMAMapReadAccess;
if (!(kIOMemoryPreparedReadOnly & _flags)) mapOptions |= kIODMAMapWriteAccess;
- ret = mapper->iovmMapMemory(this, offset, length, mapOptions,
+ err = mapper->iovmMapMemory(this, offset, length, mapOptions,
mapSpec, command, NULL, mapAddress, mapLength);
+ if (kIOReturnSuccess == err) dmaMapRecord(mapper, command, *mapLength);
+
+ return (err);
+}
+
+void IOMemoryDescriptor::dmaMapRecord(
+ IOMapper * mapper,
+ IODMACommand * command,
+ uint64_t mapLength)
+{
+ kern_allocation_name_t alloc;
+ int16_t prior;
+
+ if ((alloc = mapper->fAllocName) /* && mapper != IOMapper::gSystem */)
+ {
+ kern_allocation_update_size(mapper->fAllocName, mapLength);
+ }
+
+ if (!command) return;
+ prior = OSAddAtomic16(1, &_dmaReferences);
+ if (!prior)
+ {
+ if (alloc && (VM_KERN_MEMORY_NONE != _kernelTag))
+ {
+ _mapName = alloc;
+ mapLength = _length;
+ kern_allocation_update_subtotal(alloc, _kernelTag, mapLength);
+ }
+ else _mapName = NULL;
+ }
+}
+
+IOReturn IOMemoryDescriptor::dmaUnmap(
+ IOMapper * mapper,
+ IODMACommand * command,
+ uint64_t offset,
+ uint64_t mapAddress,
+ uint64_t mapLength)
+{
+ IOReturn ret;
+ kern_allocation_name_t alloc;
+ kern_allocation_name_t mapName;
+ int16_t prior;
+
+ mapName = 0;
+ prior = 0;
+ if (command)
+ {
+ mapName = _mapName;
+ if (_dmaReferences) prior = OSAddAtomic16(-1, &_dmaReferences);
+ else panic("_dmaReferences underflow");
+ }
+
+ if (!mapLength) return (kIOReturnSuccess);
+
+ ret = mapper->iovmUnmapMemory(this, command, mapAddress, mapLength);
+
+ if ((alloc = mapper->fAllocName))
+ {
+ kern_allocation_update_size(alloc, -mapLength);
+ if ((1 == prior) && mapName && (VM_KERN_MEMORY_NONE != _kernelTag))
+ {
+ mapLength = _length;
+ kern_allocation_update_subtotal(mapName, _kernelTag, -mapLength);
+ }
+ }
+
return (ret);
}
*mapAddress = 0;
if (kIOMemoryHostOnly & _flags) return (kIOReturnSuccess);
+ if (kIOMemoryRemote & _flags) return (kIOReturnNotAttached);
if ((type == kIOMemoryTypePhysical) || (type == kIOMemoryTypePhysical64)
|| offset || (length != _length))
mapOptions |= kIODMAMapPageListFullyOccupied;
}
- mapOptions |= kIODMAMapReadAccess;
- if (!(kIOMemoryPreparedReadOnly & _flags)) mapOptions |= kIODMAMapWriteAccess;
+ assert(dataP->fDMAAccess);
+ mapOptions |= dataP->fDMAAccess;
// Check for direct device non-paged memory
if (ioplList->fFlags & kIOPLOnDevice) mapOptions |= kIODMAMapPhysicallyContiguous;
};
err = mapper->iovmMapMemory(this, offset, length, mapOptions, &mapSpec,
command, &dmaPageList, mapAddress, mapLength);
+
+ if (kIOReturnSuccess == err) dmaMapRecord(mapper, command, *mapLength);
}
return (err);
if ((kIOMemoryTypePhysical == type) || (kIOMemoryTypePhysical64 == type))
return kIOReturnSuccess;
+ assert (!(kIOMemoryRemote & _flags));
+ if (kIOMemoryRemote & _flags) return (kIOReturnNotAttached);
+
if (_prepareLock) IOLockLock(_prepareLock);
- if (kIODirectionDMACommand & forDirection)
- {
-#if IOMD_DEBUG_DMAACTIVE
- OSIncrementAtomic(&__iomd_reservedA);
-#endif /* IOMD_DEBUG_DMAACTIVE */
- }
if (kIOMemoryTypeVirtual == type || kIOMemoryTypeVirtual64 == type || kIOMemoryTypeUIO == type)
{
error = wireVirtual(forDirection);
}
- if ((kIOReturnSuccess == error) && !(kIODirectionDMACommand & forDirection))
+ if (kIOReturnSuccess == error)
{
if (1 == ++_wireCount)
{
if ((kIOMemoryTypePhysical == type) || (kIOMemoryTypePhysical64 == type))
return kIOReturnSuccess;
+ assert (!(kIOMemoryRemote & _flags));
+ if (kIOMemoryRemote & _flags) return (kIOReturnNotAttached);
+
if (_prepareLock) IOLockLock(_prepareLock);
do
{
dataP = getDataP(_memoryEntries);
if (!dataP) break;
-#if IOMD_DEBUG_DMAACTIVE
- if (kIODirectionDMACommand & forDirection)
- {
- if (__iomd_reservedA) OSDecrementAtomic(&__iomd_reservedA);
- else panic("kIOMDSetDMAInactive");
- }
-#endif /* IOMD_DEBUG_DMAACTIVE */
-#if IOTRACKING
- if (kIOMemoryTypeVirtual == type || kIOMemoryTypeVirtual64 == type || kIOMemoryTypeUIO == type)
- {
- vm_tag_t tag;
-
- if (forDirection & kIODirectionDMACommand) tag = (forDirection & kIODirectionDMACommandMask) >> kIODirectionDMACommandShift;
- else tag = IOMemoryTag(kernel_map);
- vm_tag_set_remove(&dataP->fWireTags, kMaxWireTags, tag, &tag);
- IOMemoryDescriptorUpdateWireOwner(dataP, _memoryEntries, tag);
- }
- if (kIODirectionDMACommand & forDirection) break;
-#endif /* IOTRACKING */
-
if (kIODirectionCompleteWithError & forDirection) dataP->fCompletionError = true;
if ((kIOMemoryClearEncrypt & _flags) && (1 == _wireCount))
// kIODirectionCompleteWithDataValid & forDirection
if (kIOMemoryTypeVirtual == type || kIOMemoryTypeVirtual64 == type || kIOMemoryTypeUIO == type)
{
+ vm_tag_t tag;
+ tag = getVMTag(kernel_map);
for (ind = 0; ind < count; ind++)
{
- if (ioplList[ind].fIOPL) iopl_valid_data(ioplList[ind].fIOPL);
+ if (ioplList[ind].fIOPL) iopl_valid_data(ioplList[ind].fIOPL, tag);
}
}
}
else
{
-#if IOMD_DEBUG_DMAACTIVE
- if (__iomd_reservedA) panic("complete() while dma active");
-#endif /* IOMD_DEBUG_DMAACTIVE */
+ if (_dmaReferences) panic("complete() while dma active");
- if (dataP->fMappedBase) {
- dataP->fMapper->iovmUnmapMemory(this, NULL, dataP->fMappedBase, dataP->fMappedLength);
- dataP->fMappedBase = 0;
+ if (dataP->fMappedBaseValid) {
+ dmaUnmap(dataP->fMapper, NULL, 0, dataP->fMappedBase, dataP->fMappedLength);
+ dataP->fMappedBaseValid = dataP->fMappedBase = 0;
}
- // Only complete iopls that we created which are for TypeVirtual
- if (kIOMemoryTypeVirtual == type || kIOMemoryTypeVirtual64 == type || kIOMemoryTypeUIO == type) {
#if IOTRACKING
- //if (!(_flags & kIOMemoryAutoPrepare))
- {
- IOTrackingRemove(gIOWireTracking, &dataP->fWireTracking, ptoa(_pages));
- }
+ if (dataP->fWireTracking.link.next) IOTrackingRemove(gIOWireTracking, &dataP->fWireTracking, ptoa(_pages));
#endif /* IOTRACKING */
+ // Only complete iopls that we created which are for TypeVirtual
+ if (kIOMemoryTypeVirtual == type || kIOMemoryTypeVirtual64 == type || kIOMemoryTypeUIO == type)
+ {
for (ind = 0; ind < count; ind++)
if (ioplList[ind].fIOPL) {
if (dataP->fCompletionError)
(void) _memoryEntries->initWithBytes(dataP, computeDataSize(0, 0)); // == setLength()
dataP->fPreparationID = kIOPreparationIDUnprepared;
- dataP->fAllocTag = VM_KERN_MEMORY_NONE;
+ _flags &= ~kIOMemoryPreparedReadOnly;
}
}
}
if ((offset >= _length) || ((offset + length) > _length))
return( kIOReturnBadArgument );
+ assert (!(kIOMemoryRemote & _flags));
+ if (kIOMemoryRemote & _flags) return (0);
+
if (vec.v)
getAddrLenForInd(range0Addr, range0Len, type, vec, 0);
&& (mapping->fAddressTask == _task)
&& (mapping->fAddressMap == get_task_map(_task))
&& (options & kIOMapAnywhere)
+ && (!(kIOMapUnique & options))
&& (1 == _rangesCount)
&& (0 == offset)
&& range0Addr
size = round_page(mapping->fLength);
flags = UPL_COPYOUT_FROM | UPL_SET_INTERNAL
- | UPL_SET_LITE | UPL_SET_IO_WIRE | UPL_BLOCK_ACCESS
- | UPL_MEMORY_TAG_MAKE(getVMTag(kernel_map));
+ | UPL_SET_LITE | UPL_SET_IO_WIRE | UPL_BLOCK_ACCESS;
if (KERN_SUCCESS != memory_object_iopl_request(_memRef->entries[0].entry, 0, &size, &redirUPL2,
NULL, NULL,
- &flags))
+ &flags, getVMTag(kernel_map)))
redirUPL2 = NULL;
for (lock_count = 0;
// upl_transpose> //
else
{
- err = memoryReferenceMap(_memRef, mapping->fAddressMap, offset, length, options, &mapping->fAddress);
+ err = memoryReferenceMap(_memRef, mapping->fAddressMap, offset, length, options, &mapping->fAddress);
#if IOTRACKING
if ((err == KERN_SUCCESS) && ((kIOTracking & gIOKitDebug) || _task))
{
// faulting in later can't take place from interrupt level.
if ((addressMap == kernel_map) && !(kIOMemoryRedirected & _flags))
{
- vm_fault(addressMap,
- (vm_map_offset_t)trunc_page_64(address),
- VM_PROT_READ|VM_PROT_WRITE,
- FALSE, THREAD_UNINT, NULL,
- (vm_map_offset_t)0);
+ err = vm_fault(addressMap,
+ (vm_map_offset_t)trunc_page_64(address),
+ options & kIOMapReadOnly ? VM_PROT_READ : VM_PROT_READ|VM_PROT_WRITE,
+ FALSE, VM_KERN_MEMORY_NONE,
+ THREAD_UNINT, NULL,
+ (vm_map_offset_t)0);
+
+ if (KERN_SUCCESS != err) break;
}
sourceOffset += segLen - pageOffset;
prot = (kIODirectionOutIn & options);
if (prot)
{
- prot |= VM_PROT_MEMORY_TAG_MAKE(fMemory->getVMTag(kernel_map));
- kr = vm_map_wire(fAddressMap, start, end, prot, FALSE);
+ kr = vm_map_wire_kernel(fAddressMap, start, end, prot, fMemory->getVMTag(kernel_map), FALSE);
}
else
{
{
upl_size_t size = round_page(fLength);
upl_control_flags_t flags = UPL_COPYOUT_FROM | UPL_SET_INTERNAL
- | UPL_SET_LITE | UPL_SET_IO_WIRE | UPL_BLOCK_ACCESS
- | UPL_MEMORY_TAG_MAKE(fMemory->getVMTag(kernel_map));
+ | UPL_SET_LITE | UPL_SET_IO_WIRE | UPL_BLOCK_ACCESS;
if (KERN_SUCCESS != memory_object_iopl_request(fMemory->_memRef->entries[0].entry, 0, &size, &fRedirUPL,
NULL, NULL,
- &flags))
+ &flags, fMemory->getVMTag(kernel_map)))
fRedirUPL = 0;
if (physMem)
if (!(kIOMap64Bit & options)) panic("IOMemoryDescriptor::makeMapping !64bit");
#endif /* !__LP64__ */
- IOMemoryDescriptor * mapDesc = 0;
- IOMemoryMap * result = 0;
- OSIterator * iter;
+ IOMemoryDescriptor * mapDesc = 0;
+ __block IOMemoryMap * result = 0;
IOMemoryMap * mapping = (IOMemoryMap *) __address;
mach_vm_size_t offset = mapping->fOffset + __offset;
else
{
// look for a compatible existing mapping
- if( (iter = OSCollectionIterator::withCollection(_mappings)))
+ if (_mappings) _mappings->iterateObjects(^(OSObject * object)
{
- IOMemoryMap * lookMapping;
- while ((lookMapping = (IOMemoryMap *) iter->getNextObject()))
+ IOMemoryMap * lookMapping = (IOMemoryMap *) object;
+ if ((result = lookMapping->copyCompatible(mapping)))
{
- if ((result = lookMapping->copyCompatible(mapping)))
- {
- addMapping(result);
- result->setMemoryDescriptor(this, offset);
- break;
- }
+ addMapping(result);
+ result->setMemoryDescriptor(this, offset);
+ return (true);
}
- iter->release();
- }
+ return (false);
+ });
if (result || (options & kIOMapReference))
{
if (result != mapping)
bool IOGeneralMemoryDescriptor::serialize(OSSerialize * s) const
{
- OSSymbol const *keys[2];
- OSObject *values[2];
+ OSSymbol const *keys[2] = {0};
+ OSObject *values[2] = {0};
OSArray * array;
+ vm_size_t vcopy_size;
struct SerData {
user_addr_t address;
user_size_t length;
- } *vcopy;
+ } *vcopy = NULL;
unsigned int index, nRanges;
- bool result;
+ bool result = false;
IOOptionBits type = _flags & kIOMemoryTypeMask;
if (!array) return (false);
nRanges = _rangesCount;
- vcopy = (SerData *) IOMalloc(sizeof(SerData) * nRanges);
- if (vcopy == 0) return false;
+ if (os_mul_overflow(sizeof(SerData), nRanges, &vcopy_size)) {
+ result = false;
+ goto bail;
+ }
+ vcopy = (SerData *) IOMalloc(vcopy_size);
+ if (vcopy == 0) {
+ result = false;
+ goto bail;
+ }
keys[0] = OSSymbol::withCString("address");
keys[1] = OSSymbol::withCString("length");
- result = false;
- values[0] = values[1] = 0;
-
- // From this point on we can go to bail.
-
// Copy the volatile data so we don't have to allocate memory
// while the lock is held.
LOCK;
if (keys[1])
keys[1]->release();
if (vcopy)
- IOFree(vcopy, sizeof(SerData) * nRanges);
+ IOFree(vcopy, vcopy_size);
return result;
}
projects / apple / xnu.git / blobdiff