[User-mode-linux-user] user-mode port 0.29-2.4.0-test6

[Jeff D. <jd...@ka...>]

The user-mode port of 2.4.0-test6 is really available this time.

I fixed a stupid, long-standing bug and it started working a lot better.

I'll recap what went into the last two releases since this is the first 
release in which they are really usable:

Jim Leu's virtual ethernet driver provides a low-level network interface for 
uml.  It's easier to use, more general, and more flexible than the existing 
slip-based umn interface, which I am planning on eliminating at some point.  
Setting up the umn device is fraught with permission problems from allocating 
the pty, to setting the line discipline on it, and configuring the slip 
device.  If all you want is an isolated virtual network, the eth device 
requires no privileges; an external daemon handles packet routing.  If you 
want to put the host on the virtual net or put the virtual net on a physical 
ethernet, all you need is to be able to allocate and configure an ethertap 
device.  See http://user-mode-linux.sourceforge.net/networking.html for more 
details.

Also, there's Lars Brinkhoff's ptrace proxy, which allows gdb to debug kernel 
threads without attaching to them, which they can't because they are already 
being syscall traced.  You can invoke the debugger from kernel startup by 
putting 'debug' on the command line.  You will get an xterm with gdb in it 
stopped at the top of start_kernel().  You can start gdb afterwards by sending 
the tracing thread a SIGUSR1.  You attach to the kernel and do whatever gdb 
things you want.

This doesn't totally work yet.  Breakpoints, examining data, and looking at 
source work fine.  Stepping through code works most of the time, except 
sometimes, it acts like you said 'cont' instead of 'next' or 'step'.  Putting 
conditions or commands on breakpoints doesn't work at all.  Doing that will 
cause segfaults.  More information is available at 
http://user-mode-linux.sourceforge.net/debugging.html

The project's home page is http://user-mode-linux.sourceforge.net

The project's download page is http://sourceforge.net/project/filelist.php?grou
p_id=429

				Jeff