<div dir="ltr">You are wrong, the interrupt was not delivered to the guest because it in invalid. An unhanded interrupt makes the host crash the guest. <div style>It is hard to understand something from the screenshot. dSend to the mailing list the config file and the system.map. </div>
</div><div class="gmail_extra"><br><br><div class="gmail_quote">On Sat, Apr 27, 2013 at 1:04 AM, Naman Muley <span dir="ltr"><<a href="mailto:naman.g.muley@gmail.com" target="_blank">naman.g.muley@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Hey Eviatar,<div><br></div><div>Thank you so much. I understand what i was doing.</div><div>I've attached a screenshot of the disassembly. But i did not understand "it is very interesting to understand who generated it". how can you figure that out from the binary disassembly? </div>
<div><br></div><div>Also, i did try read up on the unhandled trap, i found this: <a href="http://wiki.debian.org/Lguest" target="_blank">http://wiki.debian.org/Lguest</a><br>and I understand why 256 is kind of odd because that interrupt number is not covered by the host and so we send it as a valid number to the guest. But the guest doesnt know how to handle this one.<br>
</div><div>But i have no idea what is causing this and how to remove this.</div><div><br></div><div>Any idea? </div><span class="HOEnZb"><font color="#888888"><div><br></div><div>Naman</div></font></span></div><div class="HOEnZb">
<div class="h5"><div class="gmail_extra"><br><br><div class="gmail_quote">
On Fri, Apr 26, 2013 at 4:33 PM, Eviatar Khen <span dir="ltr"><<a href="mailto:eviatarkhen@gmail.com" target="_blank">eviatarkhen@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000">
<div>Hi Naman,<br>
<br>
I think what Ron meant was to disassembly of the kernel's image
(vmlinux), not the Lguest binary (which is user space and does not
generate directly interrupts).<br>
The guest crashes because the host got an invalid interrupt
number, and it is very interesting to understand who generated it.<br>
<br>
Good luck,<br>
<br>
Eviatar<div><div><br>
<br>
On 04/26/2013 08:34 PM, Naman Muley wrote:<br>
</div></div></div>
<blockquote type="cite"><div><div>
<div dir="ltr">Hey Ron,
<div><br>
</div>
<div>Thanks for reaching out. I did the following( i am not sure
if that's what you wanted me to do) :</div>
<div><br>
</div>
<div>objdump -D -b binary -m i386
Documentation/virtual/lguest/lguest >
/home/ngm7/disassembly.txt </div>
<div>Following is the screenshot: Does that make sense
?</div>
<div><br>
</div>
<div>I had to take a screenshot because the
disassembly.txt is inside the virtual machine. I'm working on
ways to get that file out of the virtual machine. <br>
<br>
NOTE: the last line in the file was 6a1d. In the meanwhile, if
you want to look at any specific line, let me know. </div>
<div>I apologize for the raw kind of feedback. </div>
<div><br>
</div>
<div>Naman</div>
<div><br>
</div>
<div><br>
</div>
</div>
<div class="gmail_extra"><br>
<br>
<div class="gmail_quote">On Fri, Apr 26, 2013 at 11:45 AM, ron
minnich <span dir="ltr"><<a href="mailto:rminnich@gmail.com" target="_blank">rminnich@gmail.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">you might
want to do a quick disassembly of the binary to see what's<br>
at 0x100000. The 256 is (to me) kind of odd. So what's the
start of<br>
that image look like? Sorry, I'm rusty on lguest (i.e. I'm
not Rusty)<br>
so I'm not going to be as useful. But I would be curious to
see the<br>
disassembly.<br>
<span><font color="#888888"><br>
ron<br>
</font></span></blockquote>
</div>
<br>
</div>
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</pre>
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