MiSetProbePagesAhead

CHAR __fastcall MiSetProbePagesAhead(INT64 a1){
  __int64 v2; 
  int v3; 
  INT64 v4; 
  char *v5; 
  unsigned __int64 v6; 
  unsigned __int64 v7; 
  __int64 v8; 
  unsigned __int64 v9; 
  signed __int64 v10; 
  _QWORD *v11; 
  UNICODE_STRING *v12; 
  unsigned __int64 v13; 
  unsigned __int64 v14; 
  unsigned __int64 v15; 
  UNICODE_STRING *v16; 
  UINT8 v17; 
  WCHAR *v18; 
  wchar_t *Buffer; 
  __int64 v20; 
  __int64 v21; 
  INT64 v23; 
  LOBYTE(v2) = *(_DWORD *)(a1 + 64) & 0xF;
  if( (_BYTE)v2 == 1 )
  {
    v3 = *(_DWORD *)(a1 + 88);
    if( v3 != 3 )
    {
      v4 = *(_QWORD *)(a1 + 40);
      v23 = v4;
      v5 = (char *)MmGetPfnDb() + 40;
      v6 = 6 * (((unsigned __int64)MI_READ_PTE_LOCK_FREE((INT64)&v23) >> 12) & 0xFFFFFFFFFi64);
      LOBYTE(v2) = (_BYTE)v5;
      if( ((*(_QWORD *)&v5[8 * v6] >> 50) & 1) != 0 )
      {
        v7 = *(_QWORD *)(a1 + 16);
        v8 = 0i64;
        v9 = v4 & 0xF0FF000000000FFFui64;
        while( 1 )
        {
          v7 += 8i64;
          if( (v7 & 0xFFF) == 0 )
            break;
          if( v7 > *(_QWORD *)(a1 + 24) )
            break;
          v23 = MI_READ_PTE_LOCK_FREE(v7);
          LOBYTE(v2) = v23;
          if( (v23 & 0xF0FF000000000FFFui64) != v9 )
            break;
          v10 = 48 * (((unsigned __int64)MI_READ_PTE_LOCK_FREE((INT64)&v23) >> 12) & 0xFFFFFFFFFi64);
          LOBYTE(v2) = (_BYTE)v5;
          if( ((*(_QWORD *)&v5[v10] >> 50) & 1) == 0 )
            break;
          v11 = (_QWORD *)qword_140C4EBC0;
          v12 = (UNICODE_STRING *)((char *)MmGetPfnDb() + v10);
          if( qword_140C4EBC0 && (((unsigned __int64)v12[2].Buffer >> 60) & 7) == 1 )
          {
            v13 = (__int64)((unsigned __int128)(v10 * (__int128)0x2AAAAAAAAAAAAAABi64) >> 64) >> 3;
            v14 = (v13 >> 63) + v13;
            while( v11 )
            {
              v15 = v11[3];
              if( v14 < v15 )
              {
                v11 = (_QWORD *)*v11;
              }
              else
              {
                LOBYTE(v2) = v14 - v15;
                if( v14 - v15 < v11[4] )
                  goto LABEL_26;
                v11 = (_QWORD *)v11[1];
              }
            }
          }
          LODWORD(v2) = MiLegitimatePageForDriversToMap((INT64)v12);
          if( (int)v2 < 0 )
            break;
          if( !v3 )
          {
            Buffer = v12[2].Buffer;
            if( (((unsigned __int64)Buffer >> 60) & 7) != 1 && ((unsigned __int64)Buffer & 0x1000000000i64) == 0 )
            {
              v2 = (__int64)v12->Buffer;
              if( v2 > 0 )
                break;
            }
            LOBYTE(v2) = MI_PFN_IS_PROTO(v12, v16, v17, v18);
            if( (_DWORD)v2 )
            {
              LODWORD(v2) = *(_DWORD *)(a1 + 64);
              if( (v2 & 0x10) != 0 )
                break;
            }
          }
          ++v8;
          v5 = (char *)MmGetPfnDb() + 40;
        }
LABEL_26:
        if( v8 )
        {
          v20 = *(_QWORD *)(a1 + 16) << 25;
          *(_QWORD *)(a1 + 160) = -1i64;
          v21 = (v20 - ((_QWORD)MmGetPteBase() << 25)) >> 16;
          *(_QWORD *)(a1 + 144) = v21;
          v2 = (v8 << 12) + v21 + 4095;
          *(_DWORD *)(a1 + 64) |= 0x20u;
          *(_QWORD *)(a1 + 152) = v2;
        }
      }
    }
  }
  return v2;
}

Referenced by: