HalpSetTimer

NTSTATUS __fastcall HalpSetTimer(_KDPC *Dpc, UINT64 a2, UINT64 a3, CHAR a4, INT64 a5){
  UINT64 v5; 
  unsigned int v8; 
  NTSTATUS v9; 
  UINT64 v10; 
  unsigned int DeferredRoutine_high; 
  unsigned __int64 v12; 
  void *v13; 
  void *v14; 
  UINT64 v15; 
  UINT64 v16; 
  UINT64 v17; 
  unsigned __int128 v18; 
  __int64 v19; 
  UINT64 pullResult; 
  __int64 v22[4]; 

  v22[0] = 0i64;
  v5 = 0i64;
  pullResult = 0i64;
  v8 = a2;
  switch( (_DWORD)a2 )
  {
    case 1:
      if( ((__int64)Dpc[3].DeferredContext & 0x10) == 0 )
      {
        Dpc[4].TargetInfoAsUlong = 0;
        HalpTimerLastProblem = 17;
        v9 = -1073741637;
        HIDWORD(Dpc[3].DpcData) = 17;
        Dpc[4].DpcListEntry.Next = (_SINGLE_LIST_ENTRY *)"minkernel\\hals\\lib\\timers\\common\\timersup.c";
        LODWORD(Dpc[4].ProcessorHistory) = 692;
        goto LABEL_18;
      }
      break;
    case 2:
      if( ((__int64)Dpc[3].DeferredContext & 0x50) == 0 )
      {
        Dpc[4].TargetInfoAsUlong = 0;
        HalpTimerLastProblem = 17;
        v9 = -1073741637;
        HIDWORD(Dpc[3].DpcData) = 17;
        Dpc[4].DpcListEntry.Next = (_SINGLE_LIST_ENTRY *)"minkernel\\hals\\lib\\timers\\common\\timersup.c";
        LODWORD(Dpc[4].ProcessorHistory) = 683;
        goto LABEL_18;
      }
      break;
    case 3:
      if( ((__int64)Dpc[3].DeferredContext & 0x20) == 0 )
      {
        Dpc[4].TargetInfoAsUlong = 0;
        HalpTimerLastProblem = 17;
        v9 = -1073741637;
        HIDWORD(Dpc[3].DpcData) = 17;
        Dpc[4].DpcListEntry.Next = (_SINGLE_LIST_ENTRY *)"minkernel\\hals\\lib\\timers\\common\\timersup.c";
        LODWORD(Dpc[4].ProcessorHistory) = 671;
        goto LABEL_18;
      }
      break;
    default:
      goto LABEL_27;
  }
  v9 = RtlULongLongMult(*(_QWORD *)&Dpc[3].TargetInfoAsUlong, a3, &pullResult);
  if( v9 < 0 )
    goto LABEL_18;
  if( v8 == 3 )
  {
    v10 = pullResult + 9999999;
    if( pullResult + 9999999 < pullResult )
    {
      v9 = -1073741675;
      v10 = -1i64;
    }
    else
    {
      v9 = 0;
    }
    if( v9 < 0 )
      goto LABEL_18;
  }
  else
  {
    v10 = pullResult;
  }
  DeferredRoutine_high = HIDWORD(Dpc[3].DeferredRoutine);
  v12 = v10 / 0x989680;
  if( DeferredRoutine_high < 0x40 && v12 >= 1i64 << DeferredRoutine_high )
  {
LABEL_27:
    v9 = -1073741811;
    goto LABEL_18;
  }
  if( RtlULongLongMult(v12, 0x2540BE400ui64, (ULONGLONG *)v22) < 0 )
    v16 = HalpTimerScaleCounter(v12, *(_QWORD *)&Dpc[3].TargetInfoAsUlong, v15);
  else
    v16 = v22[0] / *(_QWORD *)&Dpc[3].TargetInfoAsUlong;
  v17 = v16;
  Dpc->ProcessorHistory = v12;
  HIDWORD(Dpc->SystemArgument2) = 1;
  v18 = v16 * (unsigned __int128)0x624DD2F1A9FBE77ui64;
  v5 = (*((_QWORD *)&v18 + 1) + ((v17 - *((_QWORD *)&v18 + 1)) >> 1)) >> 9;
  if( v8 == 2 && ((__int64)Dpc[3].DeferredContext & 0x40) == 0 )
    v8 = 1;
  if( a4 )
  {
    HalpTimerGetInternalData(Dpc, *((PVOID *)&v18 + 1), v13, v14);
    v9 = (*(__int64(__fastcall **)(__int64, _QWORD, unsigned __int64))&Dpc[2].TargetInfoAsUlong)(v19, v8, v12);
    if( v9 < 0 )
    {
      Dpc[4].TargetInfoAsUlong = v9;
      HalpTimerLastProblem = 18;
      HIDWORD(Dpc[3].DpcData) = 18;
      Dpc[4].DpcListEntry.Next = (_SINGLE_LIST_ENTRY *)"minkernel\\hals\\lib\\timers\\common\\timersup.c";
      LODWORD(Dpc[4].ProcessorHistory) = 782;
    }
  }
  else
  {
    v9 = 0;
  }
LABEL_18:
  *(_QWORD *)a5 = v5;
  return v9;
}

Referenced by: