KeAllocateProcessorProfileStructures

NTSTATUS __stdcall KeAllocateProcessorProfileStructures(
        UINT64 a1,
        INT64 a2,
        PROCESSOR_PROFILE_CONTROL_AREA **a3,
        CHAR a4){
  unsigned __int8 CurrentIrql; 
  struct _KPRCB *CurrentPrcb; 
  __int64 v8; 
  unsigned __int64 v9; 
  char *IndependentPages; 
  __int64 v11; 
  PROCESSOR_PROFILE_CONTROL_AREA *v12; 
  PROCESSOR_PROFILE_CONTROL_AREA *v13; 
  unsigned __int64 *PebsGpCounterReset; 
  NTSTATUS v15; 
  int v16; 
  char v18; 

  v16 = a1;
  CurrentIrql = KeGetCurrentIrql();
  if( !a4 )
  {
    __writecr8(2ui64);
    CurrentPrcb = KeGetCurrentPrcb();
    CurrentPrcb->ProcessorProfileControlArea = *a3;
    CurrentPrcb->ProfileEventIndexAddress = &(*a3)->PebsDsSaveArea.As64Bit.PebsIndex;
    __writecr8(CurrentIrql);
    return 0;
  }
  *a3 = 0i64;
  v18 = 0;
  v8 = (unsigned int)a1;
  v9 = a2 * (unsigned int)a1 + 160i64 * (unsigned int)a1;
  if( KiKvaShadow )
    v9 = (v9 + 4095) & 0xFFFFFFFFFFFFF000ui64;
  IndependentPages = (char *)MmAllocateIndependentPages(v9, 0i64);
  if( IndependentPages )
  {
    memset(IndependentPages, 0i64, v9);
    if( !KiKvaShadow )
      goto LABEL_9;
    if( MmCreateShadowMapping(IndependentPages, v9) )
    {
      v18 = 1;
LABEL_9:
      CurrentIrql = KeGetCurrentIrql();
      __writecr8(2ui64);
      if( KiIsIntelPebsSupported(KeGetCurrentPrcb()) )
      {
        v13 = *(PROCESSOR_PROFILE_CONTROL_AREA **)(v11 + 33944);
        if( v13 )
        {
          *a3 = v13;
          v15 = -1073741302;
        }
        else
        {
          if( v16 )
          {
            PebsGpCounterReset = v12->PebsDsSaveArea.As32Bit.PebsGpCounterReset;
            do
            {
              *PebsGpCounterReset = (unsigned __int64)IndependentPages;
              IndependentPages += a2;
              PebsGpCounterReset += 20;
              --v8;
            }
            while( v8 );
          }
          IndependentPages = 0i64;
          *a3 = v12;
          v15 = 0;
        }
      }
      else
      {
        v15 = -1073741637;
      }
      goto LABEL_15;
    }
    v15 = -1073741670;
  }
  else
  {
    v15 = -1073741801;
  }
LABEL_15:
  __writecr8(CurrentIrql);
  if( IndependentPages )
  {
    if( v18 )
      MmDeleteShadowMapping(IndependentPages, v9);
    MmFreeIndependentPages(IndependentPages, v9);
  }
  return v15;
}

Referenced by: