public KernelResult Initialize(
ProcessCreationInfo creationInfo,
int[] caps,
KResourceLimit resourceLimit,
MemoryRegion memRegion)
{
ResourceLimit = resourceLimit;
_memRegion = memRegion;
ulong personalMmHeapSize = GetPersonalMmHeapSize((ulong)creationInfo.PersonalMmHeapPagesCount, memRegion);
ulong codePagesCount = (ulong)creationInfo.CodePagesCount;
ulong neededSizeForProcess = personalMmHeapSize + codePagesCount * KMemoryManager.PageSize;
if (neededSizeForProcess != 0 && resourceLimit != null)
{
if (!resourceLimit.Reserve(LimitableResource.Memory, neededSizeForProcess))
{
return(KernelResult.ResLimitExceeded);
}
}
void CleanUpForError()
{
if (neededSizeForProcess != 0 && resourceLimit != null)
{
resourceLimit.Release(LimitableResource.Memory, neededSizeForProcess);
}
}
PersonalMmHeapPagesCount = (ulong)creationInfo.PersonalMmHeapPagesCount;
KMemoryBlockAllocator memoryBlockAllocator;
if (PersonalMmHeapPagesCount != 0)
{
memoryBlockAllocator = new KMemoryBlockAllocator(PersonalMmHeapPagesCount * KMemoryManager.PageSize);
}
else
{
memoryBlockAllocator = (MmuFlags & 0x40) != 0
? System.LargeMemoryBlockAllocator
: System.SmallMemoryBlockAllocator;
}
AddressSpaceType addrSpaceType = (AddressSpaceType)((creationInfo.MmuFlags >> 1) & 7);
bool aslrEnabled = ((creationInfo.MmuFlags >> 5) & 1) != 0;
ulong codeAddress = creationInfo.CodeAddress;
ulong codeSize = codePagesCount * KMemoryManager.PageSize;
KernelResult result = MemoryManager.InitializeForProcess(
addrSpaceType,
aslrEnabled,
!aslrEnabled,
memRegion,
codeAddress,
codeSize,
memoryBlockAllocator);
if (result != KernelResult.Success)
{
CleanUpForError();
return(result);
}
if (!ValidateCodeAddressAndSize(codeAddress, codeSize))
{
CleanUpForError();
return(KernelResult.InvalidMemRange);
}
result = MemoryManager.MapNewProcessCode(
codeAddress,
codePagesCount,
MemoryState.CodeStatic,
MemoryPermission.None);
if (result != KernelResult.Success)
{
CleanUpForError();
return(result);
}
result = Capabilities.InitializeForUser(caps, MemoryManager);
if (result != KernelResult.Success)
{
CleanUpForError();
return(result);
}
Pid = System.GetProcessId();
if (Pid == -1 || (ulong)Pid < Horizon.InitialProcessId)
{
throw new InvalidOperationException($"Invalid Process Id {Pid}.");
}
result = ParseProcessInfo(creationInfo);
if (result != KernelResult.Success)
{
CleanUpForError();
}
return(result);
}
public KernelResult Start(int mainThreadPriority, ulong stackSize)
{
lock (_processLock)
{
if (_state > ProcessState.CreatedAttached)
{
return(KernelResult.InvalidState);
}
if (ResourceLimit != null && !ResourceLimit.Reserve(LimitableResource.Thread, 1))
{
return(KernelResult.ResLimitExceeded);
}
KResourceLimit threadResourceLimit = ResourceLimit;
KResourceLimit memoryResourceLimit = null;
if (_mainThreadStackSize != 0)
{
throw new InvalidOperationException("Trying to start a process with a invalid state!");
}
ulong stackSizeRounded = BitUtils.AlignUp(stackSize, KMemoryManager.PageSize);
ulong neededSize = stackSizeRounded + _imageSize;
//Check if the needed size for the code and the stack will fit on the
//memory usage capacity of this Process. Also check for possible overflow
//on the above addition.
if (neededSize > _memoryUsageCapacity ||
neededSize < stackSizeRounded)
{
threadResourceLimit?.Release(LimitableResource.Thread, 1);
return(KernelResult.OutOfMemory);
}
if (stackSizeRounded != 0 && ResourceLimit != null)
{
memoryResourceLimit = ResourceLimit;
if (!memoryResourceLimit.Reserve(LimitableResource.Memory, stackSizeRounded))
{
threadResourceLimit?.Release(LimitableResource.Thread, 1);
return(KernelResult.ResLimitExceeded);
}
}
KernelResult result;
KThread mainThread = null;
ulong stackTop = 0;
void CleanUpForError()
{
mainThread?.Terminate();
HandleTable.Destroy();
if (_mainThreadStackSize != 0)
{
ulong stackBottom = stackTop - _mainThreadStackSize;
ulong stackPagesCount = _mainThreadStackSize / KMemoryManager.PageSize;
MemoryManager.UnmapForKernel(stackBottom, stackPagesCount, MemoryState.Stack);
}
memoryResourceLimit?.Release(LimitableResource.Memory, stackSizeRounded);
threadResourceLimit?.Release(LimitableResource.Thread, 1);
}
if (stackSizeRounded != 0)
{
ulong stackPagesCount = stackSizeRounded / KMemoryManager.PageSize;
ulong regionStart = MemoryManager.StackRegionStart;
ulong regionSize = MemoryManager.StackRegionEnd - regionStart;
ulong regionPagesCount = regionSize / KMemoryManager.PageSize;
result = MemoryManager.AllocateOrMapPa(
stackPagesCount,
KMemoryManager.PageSize,
0,
false,
regionStart,
regionPagesCount,
MemoryState.Stack,
MemoryPermission.ReadAndWrite,
out ulong stackBottom);
if (result != KernelResult.Success)
{
CleanUpForError();
return(result);
}
_mainThreadStackSize += stackSizeRounded;
stackTop = stackBottom + stackSizeRounded;
}
ulong heapCapacity = _memoryUsageCapacity - _mainThreadStackSize - _imageSize;
result = MemoryManager.SetHeapCapacity(heapCapacity);
if (result != KernelResult.Success)
{
CleanUpForError();
return(result);
}
HandleTable = new KHandleTable(System);
result = HandleTable.Initialize(Capabilities.HandleTableSize);
if (result != KernelResult.Success)
{
CleanUpForError();
return(result);
}
mainThread = new KThread(System);
result = mainThread.Initialize(
_entrypoint,
0,
stackTop,
mainThreadPriority,
DefaultCpuCore,
this);
if (result != KernelResult.Success)
{
CleanUpForError();
return(result);
}
result = HandleTable.GenerateHandle(mainThread, out int mainThreadHandle);
if (result != KernelResult.Success)
{
CleanUpForError();
return(result);
}
mainThread.SetEntryArguments(0, mainThreadHandle);
ProcessState oldState = _state;
ProcessState newState = _state != ProcessState.Created
? ProcessState.Attached
: ProcessState.Started;
SetState(newState);
//TODO: We can't call KThread.Start from a non-guest thread.
//We will need to make some changes to allow the creation of
//dummy threads that will be used to initialize the current
//thread on KCoreContext so that GetCurrentThread doesn't fail.
/* Result = MainThread.Start();
*
* if (Result != KernelResult.Success)
* {
* SetState(OldState);
*
* CleanUpForError();
* } */
mainThread.Reschedule(ThreadSchedState.Running);
return(result);
}
}
public KernelResult Initialize(
ProcessCreationInfo CreationInfo,
int[] Caps,
KResourceLimit ResourceLimit,
MemoryRegion MemRegion)
{
this.ResourceLimit = ResourceLimit;
this.MemRegion = MemRegion;
ulong PersonalMmHeapSize = GetPersonalMmHeapSize((ulong)CreationInfo.PersonalMmHeapPagesCount, MemRegion);
ulong CodePagesCount = (ulong)CreationInfo.CodePagesCount;
ulong NeededSizeForProcess = PersonalMmHeapSize + CodePagesCount * KMemoryManager.PageSize;
if (NeededSizeForProcess != 0 && ResourceLimit != null)
{
if (!ResourceLimit.Reserve(LimitableResource.Memory, NeededSizeForProcess))
{
return(KernelResult.ResLimitExceeded);
}
}
void CleanUpForError()
{
if (NeededSizeForProcess != 0 && ResourceLimit != null)
{
ResourceLimit.Release(LimitableResource.Memory, NeededSizeForProcess);
}
}
PersonalMmHeapPagesCount = (ulong)CreationInfo.PersonalMmHeapPagesCount;
KMemoryBlockAllocator MemoryBlockAllocator;
if (PersonalMmHeapPagesCount != 0)
{
MemoryBlockAllocator = new KMemoryBlockAllocator(PersonalMmHeapPagesCount * KMemoryManager.PageSize);
}
else
{
MemoryBlockAllocator = (MmuFlags & 0x40) != 0
? System.LargeMemoryBlockAllocator
: System.SmallMemoryBlockAllocator;
}
AddressSpaceType AddrSpaceType = (AddressSpaceType)((CreationInfo.MmuFlags >> 1) & 7);
bool AslrEnabled = ((CreationInfo.MmuFlags >> 5) & 1) != 0;
ulong CodeAddress = CreationInfo.CodeAddress;
ulong CodeSize = CodePagesCount * KMemoryManager.PageSize;
KernelResult Result = MemoryManager.InitializeForProcess(
AddrSpaceType,
AslrEnabled,
!AslrEnabled,
MemRegion,
CodeAddress,
CodeSize,
MemoryBlockAllocator);
if (Result != KernelResult.Success)
{
CleanUpForError();
return(Result);
}
if (!ValidateCodeAddressAndSize(CodeAddress, CodeSize))
{
CleanUpForError();
return(KernelResult.InvalidMemRange);
}
Result = MemoryManager.MapNewProcessCode(
CodeAddress,
CodePagesCount,
MemoryState.CodeStatic,
MemoryPermission.None);
if (Result != KernelResult.Success)
{
CleanUpForError();
return(Result);
}
Result = Capabilities.InitializeForUser(Caps, MemoryManager);
if (Result != KernelResult.Success)
{
CleanUpForError();
return(Result);
}
Pid = System.GetProcessId();
if (Pid == -1 || (ulong)Pid < Horizon.InitialProcessId)
{
throw new InvalidOperationException($"Invalid Process Id {Pid}.");
}
Result = ParseProcessInfo(CreationInfo);
if (Result != KernelResult.Success)
{
CleanUpForError();
}
return(Result);
}