This is the mail archive of the systemtap@sourceware.org mailing list for the systemtap project.

Index Nav:	[Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav:	[Date Prev] [Date Next]	[Thread Prev] [Thread Next]
Other format:	[Raw text]

Re: Probing assembly labels

From: Mike Mason <mmlnx at us dot ibm dot com>
To: "Frank Ch. Eigler" <fche at redhat dot com>
Cc: systemTAP <systemtap at sources dot redhat dot com>
Date: Fri, 07 Sep 2007 14:36:49 -0700
Subject: Re: Probing assembly labels
References: <46E1BFC8.2030304@us.ibm.com> <y0m4pi6p3uk.fsf@ton.toronto.redhat.com>

Frank Ch. Eigler wrote:

Mike Mason <mmlnx@us.ibm.com> writes:

Is there any way to place probes on assembly labels with SystemTap? [...]
This sounds like bug #4843.

Might be related. On the surface there appear to be some slight differences in what's being attempted, but I'm no assembly expert, so I can't say for sure.


(Do your particular assembler labels survive in any form into the
finished executables?)

Yes, they do appear in /proc/kallsyms. Specifically, they are system_call and hardware_interrupt_entry on powerpc.

BTW, I'm asking this on behalf of Dave Nomura, who's doing the instruction tracing port.

Mike

- FChE

References:
- Probing assembly labels
  - From: Mike Mason
- Re: Probing assembly labels
  - From: Frank Ch. Eigler

Index Nav:	[Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav:	[Date Prev] [Date Next]	[Thread Prev] [Thread Next]