SiGetBiosSystemPartition

INT64 __stdcall SiGetBiosSystemPartition(WCHAR **SystemPartition){
  WCHAR *PoolWithTag; 
  int BiosSystemDisk; 
  wchar_t *v4; 
  int v5; 
  int DriveLayoutInformation; 
  _DWORD *v7; 
  WCHAR *v8; 
  __int64 v9; 
  UINT64 v10; 
  unsigned int v11; 
  _DWORD *v12; 
  unsigned int v13; 
  wchar_t *Str; 
  PVOID P; 
  P = 0i64;
  PoolWithTag = 0i64;
  Str = 0i64;
  BiosSystemDisk = SiGetBiosSystemDisk(&Str);
  v4 = Str;
  v5 = BiosSystemDisk;
  if( BiosSystemDisk < 0 )
    goto LABEL_17;
  DriveLayoutInformation = SiGetDriveLayoutInformation(Str, (DRIVE_LAYOUT_INFORMATION_EX **)&P);
  v7 = P;
  v5 = DriveLayoutInformation;
  if( DriveLayoutInformation >= 0 )
  {
    if( !*(_DWORD *)P )
    {
      v8 = wcsstr(v4, L"\\Partition0");
      if( v8 )
        *v8 = 0;
      v9 = -1i64;
      do
        ++v9;
      while( v4[v9] );
      v10 = (unsigned int)(2 * v9 + 42);
      PoolWithTag = (WCHAR *)ExAllocatePoolWithTag(PagedPool, v10, 0x4B505953ui64);
      if( !PoolWithTag )
      {
        v5 = -1073741670;
        goto LABEL_14;
      }
      v11 = v7[1];
      v12 = v7 + 12;
      v13 = 0;
      if( v11 )
      {
        while( !*((_BYTE *)v12 + 33) )
        {
          ++v13;
          v12 += 36;
          if( v13 >= v11 )
            goto LABEL_12;
        }
        swprintf_s(PoolWithTag, v10 >> 1, (WCHAR *)L"%s\\Partition%lu");
        *SystemPartition = PoolWithTag;
        v5 = 0;
        goto LABEL_14;
      }
    }
LABEL_12:
    v5 = -1073740718;
  }
LABEL_14:
  if( v7 )
    ExFreePoolWithTag(v7, 0);
  if( v5 < 0 && PoolWithTag )
    ExFreePoolWithTag(PoolWithTag, 0);
LABEL_17:
  if( v4 )
    ExFreePoolWithTag(v4, 0);
  return(unsigned int)v5;
}

Referenced by: