private static int HandleSyscall(L4Handle src, Thread thr, ref Msgtag pt_tag, ref ExceptionRegisters pt_regs)
{
/*
* Make a copy of the registers, as other IPC calls can override
* the same area.
*/
ExceptionRegisters exc = pt_regs;
var scno = exc.eax;
SyscallProfiler.EnterSyscall(scno);
var ret = SyscallDispatcher.Dispatch(thr, ref exc);
if (thr.AsyncReturn)
{
return(REPLY_DEFERRED);
}
ArchAPI.ReturnFromSyscall(src, ref exc, ret);
SyscallProfiler.ExitSyscall(scno);
return(REPLY_DEFERRED);
}
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);
}
internal static int Dispatch(Thread current, ref ExceptionRegisters regs)
{
int scno, arg0, arg1, arg2, arg3, arg4, arg5;
ArchAPI.GetSyscallParameters(regs, out scno, out arg0, out arg1, out arg2, out arg3, out arg4, out arg5);
current.AsyncReturn = false;
int retval = 0;
switch (scno)
{
case __NR_exit:
Console.Write("Thread ");
Console.Write(current.Tid);
Console.WriteLine(" Exited");
current.Exit();
current.AsyncReturn = true;
break;
case __NR_read:
retval = FileSystem.Read(current, ref regs, arg0, new UserPtr(arg1), arg2);
break;
case __NR_write:
retval = FileSystem.Write(current, ref regs, arg0, new UserPtr(arg1), arg2);
break;
case __NR_open:
retval = FileSystem.Open(current, ref regs, new UserPtr(arg0), arg1, arg2);
break;
case __NR_close:
retval = FileSystem.Close(current, arg0);
break;
case __NR_unlink:
retval = FileSystem.Unlink(current, new UserPtr(arg0));
break;
case __NR_lseek:
retval = FileSystem.Lseek(current, arg0, arg1, arg2);
break;
case __NR_getpid:
retval = ExpressOS.Kernel.Misc.Getpid(current);
break;
case __NR_access:
retval = FileSystem.Access(current, ref regs, new UserPtr(arg0), arg1);
break;
case __NR_mkdir:
retval = FileSystem.Mkdir(current, new UserPtr(arg0), arg1);
break;
case __NR_clone:
retval = ExpressOS.Kernel.Exec.Clone(current, (uint)arg0, new UserPtr(arg1), new UserPtr(arg2), new UserPtr(arg3), ref regs);
break;
case __NR_mprotect:
retval = ExpressOS.Kernel.Memory.mprotect(current, new UserPtr(arg0), arg1, arg2);
break;
case __NR__newselect:
retval = ExpressOS.Kernel.Net.Select(current, ref regs, arg0, new UserPtr(arg1), new UserPtr(arg2), new UserPtr(arg3), new UserPtr(arg4));
break;
case __NR_writev:
retval = FileSystem.Writev(current, ref regs, arg0, new UserPtr(arg1), arg2);
break;
case __NR_uname:
retval = ExpressOS.Kernel.Misc.UName(current, new UserPtr(arg0));
break;
case __NR_fcntl64:
retval = FileSystem.Fcntl64(current, arg0, arg1, arg2);
break;
case __NR_gettid:
retval = ExpressOS.Kernel.Misc.Gettid(current);
break;
case __NR_dup:
retval = FileSystem.Dup(current, arg0);
break;
case __NR_pipe:
retval = FileSystem.Pipe(current, new UserPtr(arg0));
break;
case __NR_brk:
retval = (int)ExpressOS.Kernel.Memory.Brk(current, (uint)arg0);
break;
case __NR_ioctl:
retval = FileSystem.Ioctl(current, ref regs, arg0, arg1, arg2);
break;
case __NR_setgid32:
case __NR_setuid32:
case __NR_flock:
case __NR_sigaction:
case __NR_sigprocmask:
case __NR_sched_setscheduler:
case __NR_setpriority:
case __NR_fsync:
//Console.Write("Mock syscall ");
//Console.Write(scno);
//Console.WriteLine();
retval = 0;
break;
case __NR_futex:
retval = ExpressOS.Kernel.Futex.DoFutex(current, ref regs, new UserPtr(arg0), arg1, arg2, new UserPtr(arg3), new UserPtr(arg4), (uint)arg5);
break;
case __NR_dup2:
retval = FileSystem.Dup2(current, arg0, arg1);
break;
case __NR_gettimeofday:
retval = ExpressOS.Kernel.Misc.Gettimeofday(current, new UserPtr(arg0));
break;
case __NR_munmap:
retval = ExpressOS.Kernel.Memory.munmap(current, new UserPtr(arg0), arg1);
break;
case __NR_ftruncate:
retval = FileSystem.ftruncate(current, arg0, arg1);
break;
case __NR_socketcall:
retval = ExpressOS.Kernel.Net.socketcall(current, ref regs, arg0, new UserPtr(arg1));
break;
case __NR_getpriority:
retval = ExpressOS.Kernel.Misc.Getpriority(current, arg0, arg1);
break;
case __NR_pread64:
retval = FileSystem.Pread64(current, ref regs, arg0, new UserPtr(arg1), arg2, (uint)arg3);
break;
case __NR_getcwd:
retval = FileSystem.Getcwd(current, new UserPtr(arg0), arg1);
break;
case __NR_mmap2:
retval = ExpressOS.Kernel.Memory.mmap2(current, new UserPtr(arg0), arg1, arg2, arg3, arg4, arg5);
break;
case __NR_stat64:
retval = FileSystem.Stat64(current, new UserPtr(arg0), new UserPtr(arg1));
break;
case __NR_fstat64:
retval = FileSystem.FStat64(current, arg0, new UserPtr(arg1));
break;
case __NR_lstat64:
retval = FileSystem.LStat64(current, new UserPtr(arg0), new UserPtr(arg1));
break;
case __NR_getuid32:
case __NR_geteuid32:
retval = ExpressOS.Kernel.Misc.Getuid32(current);
break;
case __NR_madvise:
retval = ExpressOS.Kernel.Memory.madvise(current, (uint)arg0, arg1, arg2);
break;
case __NR_nanosleep:
retval = ExpressOS.Kernel.Misc.Nanosleep(current, ref regs, new UserPtr(arg0), new UserPtr(arg1));
break;
case __NR_sched_yield:
retval = ExpressOS.Kernel.Misc.Yield(current, ref regs);
break;
case __NR_poll:
retval = ExpressOS.Kernel.Net.Poll(current, ref regs, new UserPtr(arg0), arg1, arg2);
break;
case __NR_set_thread_area:
retval = ExpressOS.Kernel.TLS.SetThreadArea(current, new UserPtr(arg0));
break;
case __NR_clock_gettime:
retval = ExpressOS.Kernel.Misc.ClockGetTime(current, arg0, new UserPtr(arg1));
break;
case __NR_exit_group:
Console.WriteLine("Process exited");
Console.Flush();
//Misc.DumpStackTrace(current, new UserPtr(pt_regs->ebp));
//current.Parent.Space.Regions.DumpAll();
current.AsyncReturn = true;
break;
case __NR_vbinder:
retval = ExpressOS.Kernel.VBinder.Dispatch(current, ref regs, arg0, arg1, arg2, arg3);
break;
default:
Console.Write("Unknown syscall ");
Console.Write(scno);
Console.Write('@');
Console.Write(regs.ip);
Console.Write(" tid=");
Console.Write(current.Tid);
Console.WriteLine();
retval = -ErrorCode.ENOSYS;
break;
}
return(retval);
}