RE: [Fault-injection-developer] Couple of issues downloading and building the FITH source code

[Lynch, R. <rus...@in...>]

I think we need to be a little more clear on the terms we are using.  I
think that when Rob refers to "extending dprobes", he means patching =
dprobes
to enable some additional features, not taking advantage of various =
kernel
hooks that the dprobes patch adds to the kernel.

For example, a very small tweak to dprobes could enable an extra =
instruction
in the probe rpn files that allows arbitrary exit points to be called =
from
the rpn file.  This could enable something like:
1. Some user space tool analysis a driver module and then and generates =
a
rpn file that would insert probe points for each of the in/out =
operations
where each probe point calls an exit function in a FITH loadable kernel
module
2. Once the exit function in the FITH module has been called then the =
rest
of the design for FITH would be the same

	-rusty=20

-----Original Message-----
From: Wang, Stanley [mailto:sta...@in...]
Sent: Monday, October 21, 2002 10:40 PM
To: 'Rob Rhoads'
Cc: fau...@li...; Perez-Gonzalez,
Inaky
Subject: RE: [Fault-injection-developer] Couple of issues downloading
and building the FITH source code


Hi Rob,
I think it is what FITH did indeed.=20
Dprobes' fault injection mechanism causes that the faultset must be =
updated
after the driver was recompiled.
FITH uses almost all hooks (GKHI) that Dprobes places in kernel, but =
its
faultset needn't to be updated after you=20
recompiled the driver. FITH is extending the Dprobes, doing something =
better
:)

Stanley Wang=20
SW Engineer, Intel Corporation.
Intel China Software Lab.=20
Tel: 021-52574545 ext. 1171=20
iNet: 8-752-1171=20
=20
Opinions expressed are those of the author and do not represent Intel
Corporation


-----Original Message-----
From: Rob Rhoads [mailto:err...@li...]
Sent: 2002=E5=B9=B410=E6=9C=8822=E6=97=A5 12:23
To: Wang, Stanley
Cc: fau...@li...;
ina...@in...
Subject: RE: [Fault-injection-developer] Couple of issues downloading =
and
building the FITH source code


On Mon, 2002-10-21 at 21:15, Wang, Stanley wrote:
> Hi, Rob
> Dprobes replaces the instruction in the specified addrees with =
"int3".
> We replace all "in/out".

Why can't dprobes be modified/extended to do that?

>=20
> Thanks,
> Stanley
>=20

--=20
Rob Rhoads                     mailto:err...@li...
Telecom Software Platforms     office: 503-677-5498
Intel Communications Group

<disclaimer value=3D"pointless">
This email message solely contains my own personal views,=20
and not necessarily those of my employer.
</disclaimer>


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