MiFindLargePageMemory

VOID __fastcall MiFindLargePageMemory(
        INT64 a1,
        UINT64 a2,
        UINT64 a3,
        UINT64 a4,
        UINT64 ProtectionMask,
        CHAR a6,
        RTL_BALANCED_NODE **a7){
  unsigned int v7; 
  UINT64 v8; 
  _MI_PFN_CACHE_ATTRIBUTE v9; 
  UINT64 v10; 
  _QWORD *v11; 
  int v12; 
  unsigned int LargestPageIndex; 
  unsigned __int64 SizeInPages; 
  _QWORD *v15; 
  bool v16; 
  RTL_BALANCED_NODE *v17; 
  RTL_BALANCED_NODE *v18; 
  UINT64 PreferredNode; 
  UINT64 PreferredChannel; 
  UINT64 Flags; 
  _MI_PFN_CACHE_ATTRIBUTE CacheAttribute; 
  INT64 v25[2]; 
  __int128 v26; 
  __int128 v27; 
  v7 = a2;
  *(_OWORD *)v25 = 0i64;
  v8 = a3;
  v26 = 0i64;
  v27 = 0i64;
  if( (unsigned int)MiSufficientAvailablePages(a1, a3 + 160) && (unsigned int)MiCreateColorAnchors((INT64)v25, v7) )
  {
    v9 = (unsigned int)MiProtectionToCacheAttribute((unsigned int)ProtectionMask);
    v10 = HighestPhysicalPage;
    v11 = 0i64;
    CacheAttribute = v9;
    v12 = 0;
    HIDWORD(v25[1]) = v9;
    LargestPageIndex = MiGetLargestPageIndex();
    if( LargestPageIndex < 3 )
    {
      do
      {
        SizeInPages = MiLargePageSizes[LargestPageIndex];
        if( v8 >= SizeInPages )
        {
          if( SizeInPages < a4 )
            break;
          if( !v11 )
          {
            LODWORD(v15) = MiAllocatePool((struct _SLIST_ENTRY *)0x40);
            v11 = v15;
            if( !v15 )
              goto LABEL_25;
          }
          LODWORD(Flags) = 1611661312;
          LODWORD(PreferredChannel) = 0x80000000;
          LODWORD(PreferredNode) = v7;
          if( (int)MiFindContiguousPages(
                      (_MI_PARTITION *)a1,
                      SizeInPages,
                      v10,
                      SizeInPages,
                      SizeInPages,
                      CacheAttribute,
                      PreferredNode,
                      PreferredChannel,
                      Flags,
                      0i64) >= 0 )
          {
            v8 -= SizeInPages;
            if( (a6 & 2) == 0
              && (unsigned int)MiUpdateLargePagePfns((INT64)v25, 0i64, SizeInPages, (unsigned int)CacheAttribute) == 1 )
            {
              v12 = 1;
            }
            v16 = 0;
            *v11 = 0i64;
            v11[1] = SizeInPages;
            *((_BYTE *)v11 + 16) = 1;
            v17 = *a7;
            if( *a7 )
            {
              while( 1 )
              {
                if( v17[-1].Children[0] )
                {
                  v18 = v17->Children[0];
                  if( !v17->Children[0] )
                    break;
                }
                else
                {
                  v18 = v17->Children[1];
                  if( !v18 )
                  {
                    v16 = 1;
                    break;
                  }
                }
                v17 = v18;
              }
            }
            RtlAvlInsertNodeEx((unsigned __int64 *)a7, (__int64)v17, v16, v11 + 3);
            v11 = 0i64;
            if( !v8 )
              goto LABEL_25;
            v10 = -1i64;
            if( SizeInPages != -1i64 )
              continue;
          }
        }
        v10 = HighestPhysicalPage;
        ++LargestPageIndex;
      }
      while( LargestPageIndex < 3 );
      if( v11 )
        ExFreePoolWithTag(v11, 0);
LABEL_25:
      if( v12 )
        MiZeroInParallel((INT64)v25);
    }
    MiDeleteColorAnchors((INT64)v25);
  }
}

Referenced by: