Hi,
That's OK.
The first rule of a good software developer is, they say, 'if that works -
don't touch it'. :-)
There are definitely many other things to do.
Thanks for your feedback!
Regards,
Eugene
2013/10/28 Pekka Paalanen
> On Fri, 25 Oct 2013 17:19:56 +0400
> Eugene Shatokhin wrote:
On Fri, 25 Oct 2013 17:19:56 +0400
Eugene Shatokhin wrote:
> Hi,
>
> 2013/10/25 Pekka Paalanen
>
...
> > We could use some comments from the real reverse-engineers. I used
> > to be mostly a tool writer.
> >
>
> Yes, if some experts could share their knowledge of this matter, this would
> be
Hi,
2013/10/25 Pekka Paalanen
>
> Just curious, how do you detect interesting instructions to
> instrument from uninteresting instructions that do not access mmio
> areas?
>
>
As I currently use this for data race detection in general, there is no
need to separate accesses to mmio areas from the
On Sat, 19 Oct 2013 17:12:20 +0400
Eugene Shatokhin wrote:
> Hi,
>
> > Ah, you are not using the ftrace framework nor relayfs? Mmiotrace
> used to be relayfs at one point and then converted to ftrace.
>
> Yes, I considered these when I started working on KernelStrider but finally
> borrowed i
Oh, messed up the registers in the example. Should be like this:
If some original function of the driver contained, say,
mov 0xabcd (%rax), %rsi
mov %rdx, 0xbeeffeed (%rsi)
that will be transformed to something like
lea 0xabcd (%rax), %rbx
mov %rbx,
mov 0xabcd (%rax), %rsi
lea 0xbeeffeed (%rsi
Hi,
> Ah, you are not using the ftrace framework nor relayfs? Mmiotrace
used to be relayfs at one point and then converted to ftrace.
Yes, I considered these when I started working on KernelStrider but finally
borrowed ideas from Perf and implemented them. A mmapped ring buffer does
its job wel
On Fri, 18 Oct 2013 00:11:15 +0400
Eugene Shatokhin wrote:
> Hi,
>
> Good to know that!
>
> Yes, it should be faster than page faulting, although I haven't done the
> benchmarking yet. And yes, it is not needed to disable all but one CPU. In
> my current implementation, I use an ordered workque
Hi,
Good to know that!
Yes, it should be faster than page faulting, although I haven't done the
benchmarking yet. And yes, it is not needed to disable all but one CPU. In
my current implementation, I use an ordered workqueue to send the data to
the mmapped output buffer (where they will be read f
On Mon, 14 Oct 2013 22:45:09 +0400
Eugene Shatokhin wrote:
> Hi,
>
> There is an interesting TODO item on MmioTraceDeveloper page:
> "kprobes has a generic instruction decoding facility, use that instead of
> homebrewn (or KVM), and use emulation instead of page faulting"
>
> Actually, I have d
