From: Nigel Stephens <nigel@mips.com>
To: colin <colin@realtek.com.tw>
Cc: linux-mips@linux-mips.org
Subject: Re: Using hardware watchpoint for applications debugging
Date: Wed, 29 Mar 2006 15:08:16 +0100 [thread overview]
Message-ID: <442A94D0.1020106@mips.com> (raw)
In-Reply-To: <024c01c65337$63931c90$106215ac@realtek.com.tw>
colin wrote:.
> 2. When an exception happens and we find that it's not touching the righ
> address, we will discard it. However, exception will happen again because
> the former instruction will be re-executed when the exception is finished.
>
>
You'll need to single-step over the instruction which generated the
unwanted watchpoint exception, with the watchpoint disabled. Then after
handling the single step reenable the watchpoint and resume normal
execution.
It would be best if you added watchpoint support to the kernel ptrace
code: since that would make the watchpoints usable by GDB also.
Nigel
next prev parent reply other threads:[~2006-03-29 13:58 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-03-29 13:47 Using hardware watchpoint for applications debugging colin
2006-03-29 13:47 ` colin
2006-03-29 14:08 ` Nigel Stephens [this message]
2006-03-29 14:32 ` Kevin D. Kissell
2006-03-29 14:32 ` Kevin D. Kissell
2006-03-30 2:19 ` colin
2006-03-30 2:19 ` colin
2006-03-30 2:15 ` colin
2006-03-30 2:15 ` colin
2006-03-30 10:49 ` Nigel Stephens
2006-03-30 18:37 ` Ralf Baechle
2006-03-30 18:57 ` Daniel Jacobowitz
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