From: Yao Qi <yao@codesourcery.com>
To: Pedro Alves <palves@redhat.com>
Cc: Michal Lesniewski <m.lesniewski@samsung.com>, <gdb@sourceware.org>
Subject: Re: Implementation of different software breakpoint kinds in gdb server
Date: Thu, 18 Oct 2012 10:28:00 -0000 [thread overview]
Message-ID: <507FD9CB.7060805@codesourcery.com> (raw)
In-Reply-To: <507FD526.5080604@redhat.com>
On 10/18/2012 06:08 PM, Pedro Alves wrote:
> Offhand, the main issues with tracepoints on ARM are:
>
> #1 - gdbserver needs to know how to step over the tracepoints, without gdb's intervention.
>
> #2 - ARM can't hw single-step, so that needs to be done the hard way, with breakpoints
> (a.k.a., software single-step).
> All the logic to do that is in gdb. This conflicts with #1.
>
> So we'd need to teach gdbserver to software single-step. Maybe it's possible
> to tell offline all the possible destinations of an instruction, so we could still
> leave that logic in gdb, but I suspect not.
I am wondering that it might be relatively easier to implement fast
tracepoint in which step-over is not needed, if finding a jumppad is not
a problem :)
--
Yao
next prev parent reply other threads:[~2012-10-18 10:28 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-18 9:23 Michal Lesniewski
2012-10-18 10:08 ` Pedro Alves
2012-10-18 10:28 ` Yao Qi [this message]
2012-10-18 10:42 ` Pedro Alves
2012-10-18 11:44 ` Michal Lesniewski
2012-10-18 12:01 ` Pedro Alves
2012-10-19 0:31 ` John Gilmore
2012-10-19 8:51 ` Michal Lesniewski
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