public static void HandleAsyncCall(ref MessageRegisters mr)
{
int asyncCallType = (int)mr.mr0;
uint handle = (uint)mr.mr1;
int arg1 = (int)mr.mr2;
int arg2 = (int)mr.mr3;
int arg3 = (int)mr.mr4;
int arg4 = (int)mr.mr5;
int arg5 = (int)mr.mr6;
var e = Globals.CompletionQueue.Take(handle);
if (e == null)
{
Console.Write("HandleAsyncCall: cannot find completion for handle ");
Console.Write(handle);
Console.WriteLine();
return;
}
var sfs_close = e.SFSFlushCompletion;
if (sfs_close != null)
{
sfs_close.Dispose();
return;
}
var thr_completion = e.ThreadCompletionEntry;
Thread.ResumeFromCompletion(thr_completion, arg1, arg2, arg3, arg4, arg5);
}
private static int HandlePageFault(L4Handle src, Thread thr, ref Msgtag tag, ref MessageRegisters mr)
{
uint pfa;
uint pc;
uint faultType;
ArchAPI.GetPageFaultInfo(ref mr, out pfa, out pc, out faultType);
Pointer physicalPage;
uint permssion;
Pager.HandlePageFault(thr.Parent, faultType, new Pointer(pfa), new Pointer(pc), out physicalPage, out permssion);
if (thr.AsyncReturn)
{
return(REPLY_DEFERRED);
}
if (physicalPage == Pointer.Zero)
{
// We got an error, don't reply
// thr.Parent.Space.Regions.DumpAll();
Console.Write("Unhandled page fault ");
Console.Write(pfa);
Console.Write("@");
Console.Write(pc);
Console.Write(" thr=");
Console.Write(thr.Tid);
Console.WriteLine();
thr.Parent.Space.DumpAll();
return(REPLY_DEFERRED);
}
ArchAPI.ReturnFromPageFault(src, out tag, ref mr, pfa, physicalPage, permssion);
return(REPLY_IMMEDIATELY);
}
private static int HandleMessage(L4Handle src, ref Msgtag tag, ref ExceptionRegisters pt_regs, ref MessageRegisters mr)
{
Thread thr;
if (tag.Label == Msgtag.L4_PROTO_PAGE_FAULT || IsLinuxSyscall(tag, ref pt_regs))
{
thr = Globals.Threads.Lookup(src);
if (thr == null)
{
Console.Write("HandleMessage: Unknown thread ");
Console.Write(src._value);
Console.Write(" tag=");
Console.Write(tag.raw);
Console.WriteLine();
return(REPLY_DEFERRED);
}
thr.AsyncReturn = false;
if (tag.Label == Msgtag.L4_PROTO_PAGE_FAULT)
{
return(HandlePageFault(src, thr, ref tag, ref mr));
}
else
{
return(HandleSyscall(src, thr, ref tag, ref pt_regs));
}
}
else if (tag.Label == (int)Arch.IPCStubs.IPCTag.EXPRESSOS_IPC)
{
HandleAsyncCall(ref mr);
return(REPLY_DEFERRED);
}
else if (tag.Label == (int)Arch.IPCStubs.IPCTag.EXPRESSOS_IPC_CMD)
{
switch ((IPCCommand)mr.mr0)
{
case IPCCommand.EXPRESSOS_CMD_DUMP_PROFILE:
SyscallProfiler.Dump();
break;
case IPCCommand.EXPRESSOS_CMD_ENABLE_PROFILER:
SyscallProfiler.Enable = true;
break;
case IPCCommand.EXPRESSOS_CMD_DISABLE_PROFILER:
SyscallProfiler.Enable = false;
break;
case IPCCommand.EXPRESSOS_CMD_FLUSH_CONSOLE:
Console.Flush();
break;
}
return(REPLY_DEFERRED);
}
else
{
Console.Write("Unhandled exception tag=");
Console.Write(tag.raw);
Console.Write(" exc_trapno=");
Console.Write(pt_regs.trapno);
Console.Write(" err=");
Console.Write(pt_regs.err);
Console.Write(" eip=");
Console.Write(pt_regs.ip);
Console.Write(" sp=");
Console.Write(pt_regs.sp);
Console.WriteLine();
}
return(REPLY_DEFERRED);
}