RtlRemoveDynamicFunctionTable

INT64 __fastcall RtlRemoveDynamicFunctionTable(INT64 a1){
  unsigned int SessionId; 
  unsigned int v2; 
  _ETHREAD *CurrentThread; 
  __int64 v4; 
  UINT64 v5; 
  unsigned int *v6; 
  unsigned int v7; 
  unsigned int v8; 
  unsigned __int64 *v9; 
  unsigned int v10; 
  _ETHREAD *v11; 
  unsigned __int64 v12; 
  int v13; 
  bool v14; 
  __int64 v15; 
  __int64 v16; 
  int v17; 
  __int64 v18; 
  unsigned __int64 v20; 
  __int64 v21; 
  char v22; 
  int v23; 
  if( (a1 & 3) != 0 )
    ExRaiseDatatypeMisalignment();
  v20 = *(_QWORD *)(a1 + 48);
  v21 = *(_QWORD *)(a1 + 40);
  SessionId = -1;
  if( v21 - v20 >= 0xFFFFFFFF )
    return 3221225621i64;
  v2 = -1073741569;
  CurrentThread = (_ETHREAD *)KeGetCurrentThread();
  v4 = *((_QWORD *)CurrentThread + 68);
  --*((_WORD *)CurrentThread + 243);
  v5 = v4 + 2128;
  ExAcquirePushLockExclusiveEx(v4 + 2128, 0i64);
  v6 = *(unsigned int **)(v4 + 2120);
  if( v6 )
  {
    v7 = *v6;
    v8 = 1;
    if( *v6 > 1 )
    {
      v9 = (unsigned __int64 *)(v6 + 12);
      while( *v9 < v20 )
      {
        ++v8;
        v9 += 3;
        if( v8 >= v7 )
          goto LABEL_15;
      }
      if( *(_QWORD *)&v6[6 * v8 + 6] == v20 && v6[6 * v8 + 8] == (_DWORD)v21 - (_DWORD)v20 )
      {
        v10 = v7 - 1;
        if( v8 != v7 - 1 )
          memmove((UINT8 *)&v6[6 * v8 + 4], (UINT8 *)&v6[4 * v8 + 10 + 2 * v8], 24i64 * (v7 - v8 - 1));
        v2 = 0;
        *v6 = v10;
      }
    }
  }
LABEL_15:
  if( (_InterlockedExchangeAdd64((volatile signed __int64 *)v5, 0xFFFFFFFFFFFFFFFFui64) & 6) == 2 )
    ExfTryToWakePushLock((volatile INT64 *)v5);
  v23 = 0;
  v11 = (_ETHREAD *)KeGetCurrentThread();
  if( (unsigned int)MiGetSystemRegionType(v5) == 1 )
    SessionId = MmGetSessionIdEx(*((_QWORD *)v11 + 23));
  --*((_WORD *)v11 + 243);
  v22 = ++*((_BYTE *)v11 + 794);
  v12 = 0i64;
  v13 = (*((char *)v11 + 792) | *((char *)v11 + 870)) ^ 0x3F;
  while( 1 )
  {
    v14 = !_BitScanReverse((unsigned int *)&v15, v13);
    if( v14 )
      break;
    v13 &= ~(1 << v15);
    v16 = *((_QWORD *)v11 + 100) + 96 * v15;
    if( (*(_BYTE *)(v16 + 26) & 1) != 0
      && (*(_DWORD *)(v16 + 32) & 1) == 0
      && (*(_QWORD *)(v16 + 32) & 0x7FFFFFFFFFFFFFFCi64) == (v5 & 0x7FFFFFFFFFFFFFFCi64)
      && *(_DWORD *)(v16 + 40) == SessionId )
    {
      *(_BYTE *)(v16 + 26) &= ~1u;
      if( *(_QWORD *)(v16 + 32) )
      {
        v12 = v16;
        break;
      }
    }
  }
  if( v12 )
  {
    *(_BYTE *)(v12 + 32) |= 2u;
    if( *(__int64 *)(v12 + 32) < 0 )
      KiAbEntryRemoveFromTree(v12);
    v17 = *(_DWORD *)(v12 + 88);
    v23 = v17 & 0x1FFFF;
    *(_DWORD *)(v12 + 88) = v17 & 0xFFFE0000;
    *(_BYTE *)(v12 + 25) &= ~1u;
    *(_QWORD *)(v12 + 32) = 0i64;
    v18 = (__int64)(v12 - *((_QWORD *)v11 + 100)) / 96;
    if( v22 == 1 )
      *((_BYTE *)v11 + 792) |= 1 << v18;
    else
      _InterlockedOr8((volatile signed __int8 *)v11 + 870, 1 << v18);
  }
  else if( (*((_DWORD *)v11 + 30) & 0x10000) == 0 )
  {
    KeBugCheckEx(0x162u, (ULONG_PTR)v11, v5, SessionId, 0i64);
  }
  --*((_BYTE *)v11 + 794);
  KiAbThreadRemoveBoosts((ULONG_PTR)v11, v5, (unsigned int *)&v23);
  v14 = (*((_WORD *)v11 + 243))++ == 0xFFFF;
  if( v14 && *((_ETHREAD **)v11 + 19) != (_ETHREAD *)((char *)v11 + 152) )
    KiCheckForKernelApcDelivery();
  KiLeaveGuardedRegionUnsafe((__int64)CurrentThread);
  return v2;
}

Referenced by: