MiAllocateCombineProto

INT64 *__fastcall MiAllocateCombineProto(INT64 a1, UINT64 a2, UINT64 a3, _QWORD *a4, INT64 a5){
  unsigned int v6; 
  unsigned __int64 inserted; 
  UINT64 v10; 
  volatile LONG *v11; 
  unsigned __int64 v12; 
  INT64 v13; 
  int v14; 
  unsigned int v16; 
  signed __int64 v17; 
  signed __int64 v18; 
  __int64 *v19; 
  _QWORD *v20; 
  __int64 v21; 
  int v22; 
  __int64 v23; 
  void *v24; 
  struct _KLOCK_QUEUE_HANDLE LockHandle; 
  UINT64 v26; 
  unsigned int v27; 
  int v28; 
  _QWORD *v29; 
  v6 = a3;
  memset(&LockHandle, 0, sizeof(LockHandle));
  if( !a2 )
    return 0i64;
  inserted = 0i64;
  v10 = a2 & 0xF;
  v11 = (volatile LONG *)(16 * v10 + a1 + 104);
  v12 = ExAcquireSpinLockShared(v11);
  v28 = 0;
  v26 = a2;
  v27 = v6;
  v29 = a4;
  v13 = *(_QWORD *)(a1 + 16 * (v10 + 6));
  if( !v13 )
  {
LABEL_8:
    v14 = a5;
    goto LABEL_9;
  }
  while( 1 )
  {
    if( a2 > *(_QWORD *)(v13 + 24) )
    {
LABEL_6:
      v13 = *(_QWORD *)(v13 + 8);
      goto LABEL_7;
    }
    if( a2 >= *(_QWORD *)(v13 + 24) )
    {
      v16 = *(_DWORD *)(v13 + 40) & 0x1F;
      if( v6 >= v16 )
      {
        if( v6 > v16 )
          goto LABEL_6;
        if( !a4 )
          break;
        if( *a4 > *(_QWORD *)(v13 + 64) )
          goto LABEL_6;
        if( *a4 >= *(_QWORD *)(v13 + 64) )
          break;
      }
    }
    v13 = *(_QWORD *)v13;
LABEL_7:
    if( !v13 )
      goto LABEL_8;
  }
  v17 = *(_QWORD *)(v13 + 32);
  if( !v17 )
  {
LABEL_30:
    v14 = 0;
LABEL_9:
    _InterlockedAnd(v11, 0xBFFFFFFF);
    _InterlockedDecrement(v11);
    __writecr8(v12);
    if( !v14 )
      return 0i64;
    KeAcquireInStackQueuedSpinLock((UINT64 *)(a1 + 88), &LockHandle);
    v19 = *(__int64 **)(a1 + 72);
    v20 = (_QWORD *)(a1 + 72);
    if( v19 != (__int64 *)(a1 + 72) )
    {
      inserted = *(_QWORD *)(a1 + 72);
      v21 = *v19;
      if( *(_QWORD **)(inserted + 8) != v20 || *(_QWORD *)(v21 + 8) != inserted )
        __fastfail(3u);
      *v20 = v21;
      *(_QWORD *)(v21 + 8) = v20;
      ++*(_DWORD *)((inserted & 0xFFFFFFFFFFFFF000ui64) + 8);
    }
    KeReleaseInStackQueuedSpinLockFromDpcLevel(&LockHandle);
    __writecr8(LockHandle.OldIrql);
    if( !inserted )
    {
      LODWORD(v23) = MiAllocatePool((struct _SLIST_ENTRY *)0x112);
      v24 = (void *)v23;
      if( !v23 )
        return 0i64;
      *(_DWORD *)(v23 + 8) = 1;
      *(_QWORD *)(v23 + 16) = a1;
      inserted = (unsigned __int64)MiInsertNewCombineBlocks(a1, v23 + 72);
      if( !inserted )
      {
        ExFreePoolWithTag(v24, 0);
        return 0i64;
      }
    }
    _InterlockedExchangeAdd((volatile signed __int32 *)(a1 + 388), 1u);
    v22 = (*(_DWORD *)(inserted + 40) ^ v6) & 0x1F;
    *(_QWORD *)(inserted + 32) = 1i64;
    *(_DWORD *)(inserted + 40) ^= v22;
    *(_QWORD *)(inserted + 64) = *a4;
    _InterlockedExchangeAdd((volatile signed __int32 *)(a1 + 392), 1u);
    return(INT64 *)inserted;
  }
  while( 1 )
  {
    v18 = v17;
    v17 = _InterlockedCompareExchange64((volatile signed __int64 *)(v13 + 32), v17 + 1, v17);
    if( v18 == v17 )
      break;
    if( !v17 )
      goto LABEL_30;
  }
  ExReleaseSpinLockSharedFromDpcLevel(v11);
  __writecr8(v12);
  _InterlockedExchangeAdd((volatile signed __int32 *)(a1 + 392), 1u);
  return(INT64 *)v13;
}

Referenced by: