RtlpHpVsSubsegmentCommitPages

NTSTATUS __stdcall RtlpHpVsSubsegmentCommitPages(INT64 a1, INT64 a2, UINT64 r8_0, UINT64 a4, INT64 a5){
  unsigned __int64 v6; 
  unsigned __int64 v7; 
  unsigned __int64 v9; 
  volatile signed __int64 *v10; 
  unsigned int v11; 
  __int64 v12; 
  INT64 v13; 
  UINT8 CurrentIrql; 
  UINT8 v15; 
  INT64 v16; 
  unsigned __int64 v17; 
  NTSTATUS v18; 
  _ETHREAD *v20; 
  unsigned int SessionId; 
  unsigned __int8 v22; 
  int v23; 
  bool v24; 
  __int64 v25; 
  _KLOCK_ENTRY *v26; 
  __int64 v27; 
  _ETHREAD *CurrentThread; 
  int v29; 
  UINT8 v30; 
  UINT64 a3; 

  v6 = (unsigned int)a4;
  _BitScanForward64(&v7, r8_0);
  _BitScanReverse64(&v9, r8_0);
  v10 = (volatile signed __int64 *)(a2 + 24);
  v29 = v9 - v7 + 1;
  v11 = v29 << 12;
  v12 = ((1i64 << v29) - 1) << v7;
  v13 = a2 + (unsigned int)((_DWORD)v7 << 12);
  if( *(_DWORD *)(a1 + 8) )
  {
    CurrentIrql = KeGetCurrentIrql();
    __writecr8(2ui64);
    ExpAcquireSpinLockExclusive((INT64 *)(a2 + 24), CurrentIrql);
    v15 = CurrentIrql;
    v11 = v29 << 12;
    v30 = v15;
  }
  else
  {
    CurrentThread = (_ETHREAD *)KeGetCurrentThread();
    v30 = 0;
    --CurrentThread->Tcb.SpecialApcDisable;
    ExAcquirePushLockExclusiveEx((_EX_PUSH_LOCK *)(a2 + 24), 0i64);
  }
  v16 = a1 ^ *(_QWORD *)(a1 + 128);
  if( !(_DWORD)a5 )
  {
    ((void(__fastcall *)(INT64, INT64, _QWORD))(a1 ^ RtlpHpHeapGlobals ^ *(_QWORD *)(a1 + 160)))(v16, v13, v11);
    *(_QWORD *)(a2 + 16) &= ~v12;
    v17 = -(int)v6;
LABEL_5:
    _InterlockedExchangeAdd64((volatile signed __int64 *)(a1 + 48), v17);
    v18 = 0;
    goto LABEL_6;
  }
  v18 = ((__int64(__fastcall *)(INT64, INT64, _QWORD))(a1 ^ RtlpHpHeapGlobals ^ *(_QWORD *)(a1 + 152)))(v16, v13, v11);
  if( v18 >= 0 )
  {
    *(_QWORD *)(a2 + 16) |= v12;
    v17 = v6;
    goto LABEL_5;
  }
LABEL_6:
  if( *(_DWORD *)(a1 + 8) )
  {
    *(_DWORD *)v10 = 0;
    __writecr8(v30);
  }
  else
  {
    if( (_InterlockedExchangeAdd64(v10, 0xFFFFFFFFFFFFFFFFui64) & 6) == 2 )
      ExfTryToWakePushLock((_EX_PUSH_LOCK *)(a2 + 24));
    LODWORD(a3) = 0;
    v20 = (_ETHREAD *)KeGetCurrentThread();
    if( MiGetSystemRegionType(a2 + 24) == 1 )
      SessionId = MmGetSessionIdEx(v20->Tcb.ApcState.Process);
    else
      SessionId = -1;
    --v20->Tcb.SpecialApcDisable;
    v22 = ++v20->Tcb.AbAllocationRegionCount;
    v23 = ((char)v20->Tcb.AbEntrySummary | (char)v20->Tcb.AbOrphanedEntrySummary) ^ 0x3F;
    v24 = !_BitScanReverse((unsigned int *)&v25, v23);
    if( v24 )
      goto LABEL_31;
    while( 1 )
    {
      v26 = &v20->Tcb.LockEntries[v25];
      v23 &= ~(1 << v25);
      if( (v26->AcquiredByte & 1) != 0
        && (v26->LockState.$E8276A2CF8B819ED32D1B6FEB35D730A::_bf_0 & 1) == 0
        && (v26->LockState.$E8276A2CF8B819ED32D1B6FEB35D730A::_bf_0 & 0x7FFFFFFFFFFFFFFCi64) == ((unsigned __int64)v10 & 0x7FFFFFFFFFFFFFFCi64)
        && v26->LockState.SessionId == SessionId )
      {
        v26->AcquiredByte &= ~1u;
        if( v26->LockState.$E8276A2CF8B819ED32D1B6FEB35D730A::_bf_0 )
          break;
      }
      v24 = !_BitScanReverse((unsigned int *)&v25, v23);
      if( v24 )
        goto LABEL_31;
    }
    if( !v26 )
    {
LABEL_31:
      if( (*(&v20->Tcb.MiscFlags + 1) & 0x10000) == 0 )
        KeBugCheckEx(0x162u, v20, (PVOID)(a2 + 24), (PVOID)SessionId, 0i64);
    }
    else
    {
      v26->CrossThreadReleasableAndBusyByte |= 2u;
      if( v26->LockState.$E8276A2CF8B819ED32D1B6FEB35D730A::_bf_0 < 0 )
        KiAbEntryRemoveFromTree(v26);
      LODWORD(a3) = v26->BoostBitmap.AllFields & 0x1FFFF;
      v26->BoostBitmap.AllFields &= 0xFFFE0000;
      v26->ThreadLocalFlags &= ~1u;
      v26->LockState.$E8276A2CF8B819ED32D1B6FEB35D730A::_bf_0 = 0i64;
      v27 = v26 - v20->Tcb.LockEntries;
      if( v22 == 1 )
        v20->Tcb.AbEntrySummary |= 1 << v27;
      else
        _InterlockedOr8((volatile signed __int8 *)&v20->Tcb.AbOrphanedEntrySummary, 1 << v27);
    }
    --v20->Tcb.AbAllocationRegionCount;
    KiAbThreadRemoveBoosts(&v20->Tcb, (VOID *)(a2 + 24), &a3);
    v24 = v20->Tcb.SpecialApcDisable++ == -1;
    if( v24 && ($F25F8C4BA33AF922A5F1AF68CD89DDDF *)v20->Tcb.ApcState.ApcListHead[0].Flink != &v20->Tcb.152 )
      KiCheckForKernelApcDelivery();
    KiLeaveGuardedRegionUnsafe((__int64)KeGetCurrentThread());
  }
  return v18;
}

Referenced by: