private static unsafe uint sys_brk(int len)
{
var Process = Scheduler.RunningProcess;
uint directory = Process.PageDirectory;
uint current = Process.HeapCurrent;
uint end = Process.HeapEndAddress;
// Assert EAX == sys_brk
uint addr = current;
current += (uint)len;
if (current > 0xA5000000)
{
Debug.Write("sys_brk failed\n");
return(0);
}
// Assert end should be page aligned
while (current > end)
{
Paging.AllocateFrame(Paging.GetPage((uint *)directory, end, true), 0, true);
Paging.InvalidatePageAt(end);
end += Paging.PageSize;
}
Process.HeapCurrent = current;
Process.HeapEndAddress = end;
return(addr);
}
