MiCoalesceFreeLargePages

VOID __stdcall MiCoalesceFreeLargePages(INT64 rcx0, INT64 rdx0, UINT64 a3){
  unsigned __int64 v3; 
  unsigned __int64 v4; 
  INT64 v5; 
  INT64 v6; 
  INT64 v7; 
  unsigned __int8 v8; 
  unsigned int v9; 
  unsigned __int64 v10; 
  INT64 v11; 
  unsigned int v12; 
  __int128 *v13; 
  int v14; 
  unsigned int v15; 
  INT64 v16; 
  unsigned int v17; 
  unsigned int v18; 
  unsigned int v19; 
  unsigned int v20; 
  INT64 v21; 
  __int64 v22; 
  INT64 v23; 
  INT64 v24; 
  __int64 v25; 
  unsigned __int64 i; 
  unsigned int a2; 
  int a4; 
  INT64 v30; 
  INT64 v31; 
  INT64 v32; 
  INT64 CurrentThread; 
  __int128 v34; 
  a2 = a3;
  v32 = rcx0;
  v3 = MiLargePageSizes[(unsigned int)a3];
  v4 = MiLargePageSizes[(unsigned int)(a3 - 1)];
  LODWORD(v31) = a3 - 1;
  v34 = 0i64;
  v5 = (INT64)MmGetPfnDb() + 48 * rdx0;
  v6 = rdx0;
  a4 = 0;
  v7 = v5;
  v30 = v5;
  v8 = 17;
  CurrentThread = (INT64)KeGetCurrentThread();
  --*(_WORD *)(CurrentThread + 486);
  ExAcquirePushLockSharedEx(rcx0 + 192, 0i64);
  v9 = 0;
  v10 = v4 / v3;
  if( v4 / v3 )
  {
    v11 = v32;
    do
    {
      if( !(unsigned int)MiIsPfn(v6) )
        break;
      if( !MiLargePfnPromoteCandidate(v11, v7) )
        break;
      ++v9;
      v6 += v3;
      ++*((_DWORD *)&v34 + ((unsigned __int64)*(unsigned __int8 *)(v7 + 34) >> 6));
      v7 += 48 * v3;
    }
    while( v9 < v10 );
    v5 = v30;
    v8 = 17;
  }
  if( v9 == v10 )
  {
    v12 = 0;
    v13 = &v34;
    v14 = 0;
    v15 = 1;
    LODWORD(v16) = 0;
    do
    {
      v17 = *(_DWORD *)v13;
      v18 = v15;
      v19 = v12;
      if( *(_DWORD *)v13 && v12 )
        v14 = 1;
      v15 = v16;
      v12 = *(_DWORD *)v13;
      if( v19 >= v17 )
        v15 = v18;
      v16 = (unsigned int)(v16 + 1);
      v13 = (__int128 *)((char *)v13 + 4);
      if( v19 >= v17 )
        v12 = v19;
    }
    while( (unsigned int)v16 < 4 );
    if( v14 && (v20 = 0, v21 = v5, v10) )
    {
      while( (unsigned int)MiChangePageAttributeLargeFreeZeroPage(v21, a2, v15) )
      {
        ++v20;
        v21 += 48 * v3;
        if( v20 >= v10 )
          goto LABEL_21;
      }
    }
    else
    {
LABEL_21:
      v22 = 0i64;
      v23 = rdx0;
      v24 = v5;
      v30 = rdx0;
      if( v10 )
      {
        while( (unsigned int)MiIsPfn(v23) )
        {
          if( v24 == v5 )
          {
            v8 = MiLockPageInline(v24);
          }
          else if( _interlockedbittestandset64((volatile signed __int32 *)(v24 + 24), 0x3Fui64) )
          {
            break;
          }
          if( !MiLargePfnPromoteCandidate(v32, v24) || *(unsigned __int8 *)(v24 + 34) >> 6 != v15 )
          {
            _InterlockedAnd64((volatile signed __int64 *)(v24 + 24), 0x7FFFFFFFFFFFFFFFui64);
            if( v24 == v5 )
              __writecr8(v8);
            break;
          }
          v22 = (unsigned int)(v22 + 1);
          v24 += 48 * v3;
          v23 = v3 + v30;
          v30 += v3;
          if( (unsigned int)v22 >= v10 )
            break;
        }
      }
      if( (unsigned int)v22 == v10 )
      {
        MiLargePagePromote(rdx0, a2, v16, &a4);
        v25 = v5 + 48 * v3;
      }
      else
      {
        v25 = v5 & -(__int64)((_DWORD)v22 != 0);
      }
      if( (_DWORD)v22 )
      {
        for( i = v5 + v3 * (48 * v22 - 48); i != v25; i -= 48 * v3 )
          _InterlockedAnd64((volatile signed __int64 *)(i + 24), 0x7FFFFFFFFFFFFFFFui64);
        _InterlockedAnd64((volatile signed __int64 *)(i + 24), 0x7FFFFFFFFFFFFFFFui64);
        __writecr8(v8);
      }
      if( a4 )
        MiChangePageHeatImmediate(rdx0, (unsigned int)v31, 0i64);
    }
  }
  MiUnlockDynamicMemoryShared(v32, CurrentThread);
}

Referenced by: