KeStackAttachProcess

VOID *__stdcall KeStackAttachProcess(_EPROCESS *PROCESS, PRKAPC_STATE ApcState){
  _ETHREAD *CurrentThread; 
  VOID *result; 
  UINT8 CurrentIrql; 
  struct _KPRCB *CurrentPrcb; 
  _DWORD *SchedulerAssist; 
  UINT64 SpinCount; 

  CurrentThread = (_ETHREAD *)KeGetCurrentThread();
  LODWORD(result) = KeGetPcr()->Prcb.DpcRequestSummary;
  if( ((unsigned int)result & 0x10001) != 0 || (PROCESS->Pcb._bf_0 & 0x400) != 0 )
    KeBugCheckEx(
      5u,
      PROCESS,
      CurrentThread->Tcb.ApcState.Process,
      (PVOID)CurrentThread->Tcb.ApcStateIndex,
      (PVOID)(KeGetPcr()->Prcb._bf_0 & 0x10001));
  if( CurrentThread->Tcb.ApcState.Process == PROCESS )
  {
    ApcState->Process = (_EPROCESS *)1;
  }
  else
  {
    CurrentIrql = KeGetCurrentIrql();
    __writecr8(2ui64);
    CurrentPrcb = KeGetCurrentPrcb();
    LODWORD(SpinCount) = 0;
    while( _interlockedbittestandset64((volatile signed __int32 *)&CurrentThread->Tcb.ThreadLock, 0i64) )
    {
      do
        KeYieldProcessorEx(&SpinCount);
      while( CurrentThread->Tcb.ThreadLock );
      SchedulerAssist = CurrentPrcb->SchedulerAssist;
      if( SchedulerAssist && CurrentPrcb->NestingLevel <= 1u )
        ++SchedulerAssist[6];
    }
    if( CurrentThread->Tcb.ApcStateIndex )
    {
      KiAttachProcess(&CurrentThread->Tcb, &PROCESS->Pcb, CurrentIrql, 0i64, ApcState);
    }
    else
    {
      KiAttachProcess(&CurrentThread->Tcb, &PROCESS->Pcb, CurrentIrql, 0i64, &CurrentThread->Tcb.SavedApcState);
      ApcState->Process = 0i64;
    }
  }
  return result;
}

Referenced by: