From: Orjan Friberg <orjan.friberg@axis.com>
To: Mark Kettenis <kettenis@gnu.org>
Cc: randolph@tausq.org, cagney@gnu.org, gdb-patches@sources.redhat.com
Subject: Re: [patch/RFA] multiarch INSTRUCTION_NULLIFIED
Date: Fri, 19 Nov 2004 09:25:00 -0000 [thread overview]
Message-ID: <419DBBE8.4050804@axis.com> (raw)
In-Reply-To: <200411181655.iAIGthDa026050@juw15.nfra.nl>
Mark Kettenis wrote:
> That's why we had the STEP_SKIPS_DELAY macro that makes sure the
> single-step is done without any breakpoints inserted. This was
> replaced by single_step_through_delay which presumably will also be
> used on a new CRISv32 port.
Yes, CRISv32 basically has the MIPS situation in reverse: if you single-step
into a delay slot (belonging to a branch instruction) and single-step again, the
branch instruction will be re-executed. As a consequence, if there is a
breakpoint at the branch instruction itself, we need to step again before
re-inserting it (otherwise we'd just hit it again). (I like to think of
single_step_through_delay as "did we just step into a situation where we need to
step again".)
--
Orjan Friberg
Axis Communications
next prev parent reply other threads:[~2004-11-19 9:25 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-11-18 0:02 Randolph Chung
2004-11-18 14:26 ` Andrew Cagney
2004-11-18 16:21 ` Randolph Chung
2004-11-18 16:56 ` Mark Kettenis
2004-11-19 9:25 ` Orjan Friberg [this message]
2004-11-23 17:50 ` Randolph Chung
2004-11-23 19:33 ` Mark Kettenis
2004-11-28 17:26 ` Andrew Cagney
2004-11-28 18:41 ` Randolph Chung
2004-11-28 19:55 ` Andrew Cagney
2004-11-29 3:30 ` Randolph Chung
2004-11-29 15:12 ` Andrew Cagney
2004-11-30 6:56 ` Randolph Chung
2004-11-30 14:51 ` Andrew Cagney
2004-11-30 16:44 ` Randolph Chung
2004-11-30 16:59 ` Andrew Cagney
2004-11-30 17:38 ` Randolph Chung
2004-12-01 21:29 ` Andrew Cagney
2004-12-01 22:33 ` Randolph Chung
2004-12-01 23:32 ` Andrew Cagney
2004-12-02 5:24 ` Randolph Chung
2004-12-02 14:27 ` Daniel Jacobowitz
2004-12-03 18:11 ` Andrew Cagney
2004-12-03 18:15 ` Randolph Chung
2004-12-03 18:57 ` Daniel Jacobowitz
2004-12-03 19:57 ` Randolph Chung
2004-12-03 21:40 ` Randolph Chung
2004-12-03 21:58 ` Andrew Cagney
2004-12-03 22:52 ` Daniel Jacobowitz
2004-12-04 0:00 ` Randolph Chung
2004-12-04 0:55 ` Randolph Chung
2004-12-04 11:27 ` Mark Kettenis
2004-12-01 6:19 ` Randolph Chung
2004-12-01 17:11 ` Daniel Jacobowitz
2004-12-01 17:17 ` Randolph Chung
2004-12-01 17:19 ` Daniel Jacobowitz
2004-12-01 17:25 ` Randolph Chung
2004-12-01 17:28 ` Daniel Jacobowitz
2004-12-01 17:30 ` Randolph Chung
2004-12-01 17:35 ` Randolph Chung
2004-12-01 18:14 ` Randolph Chung
2004-12-01 21:25 ` Andrew Cagney
2004-12-01 13:32 Paul Schlie
2004-12-01 16:25 Randolph Chung
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