internal static OpenFileCompletion OpenAndGetSizeAsync(Thread current, byte[] filename, int flags, int mode)
{
ArchDefinition.Assert(filename[filename.Length - 1] == 0);
var buf = Globals.AllocateAlignedCompletionBuffer(filename.Length);
if (!buf.isValid)
{
return(null);
}
buf.CopyFrom(0, filename);
var completion = new OpenFileCompletion(current, GenericINode.INodeKind.ArchINodeKind, buf, flags, mode);
IPCStubs.OpenAndGetSizeAsync(current.Parent.helperPid, current.impl._value.thread._value, new Pointer(completion.buf.Location), flags, mode);
return(completion);
}
public static Pointer linux_sys_get_user_page(int helper_pid, uint faultType, Pointer shadowAddress)
{
SetMR(0, (int)Type.EXPRESSOS_OP_GET_USER_PAGE);
SetMR(1, helper_pid);
SetMR(2, faultType & L4FPage.L4_FPAGE_FAULT_WRITE);
SetMR(3, shadowAddress.ToUInt32());
var tag = new Msgtag((int)IPCTag.EXPRESSOS_IPC, 4, 0, 0);
var res = l4_stub_ipc_call(ArchGlobals.LinuxServerTid, tag, Timeout.Never);
if (l4_stub_ipc_error(res) != 0)
{
return(Pointer.Zero);
}
var relative_pos = GetMR(1);
ArchDefinition.Assert(relative_pos < ArchGlobals.LinuxMainMemorySize);
return(ArchGlobals.LinuxMainMemoryStart + relative_pos);
}