From: Mark Salter <msalter@redhat.com>
To: nsd@redhat.com
Cc: fche@redhat.com, cagney@redhat.com, jtc@redback.com,
sid@sources.redhat.com, gdb-patches@cygnus.com
Subject: Re: Possible remote.c patch for Z-packet breakpoints + Harvard + SID
Date: Mon, 16 Jul 2001 16:42:00 -0000 [thread overview]
Message-ID: <200107162342.f6GNgUn12498@deneb.localdomain> (raw)
In-Reply-To: <200107161931.f6GJVV719853@rtl.cygnus.com>
>>>>> Nick Duffek writes:
> Executive summary for the lists I've added to this thread: Z-packet
> breakpoints don't work with SID on Harvard architectures.
> On 16-Jul-2001, I wrote:
>> When a Harvard-architecture GDB sends an address to SID, the address has a
>> high bit set indicating whether the address space, e.g. instruction
>> vs. data.
FWIW, I recently had to deal with this in RedBoot. Since the RedBoot stub
already had to deal with differentiating code and data addresses, I just
used the same mechanism to convert from a "gdb" address to a hw code or
data address when decoding the Z packet before the __set_breakpoint() is
called.
--Mark
next prev parent reply other threads:[~2001-07-16 16:42 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <o5pub0sqqy.fsf@toenail.toronto.redhat.com>
2001-07-16 14:35 ` Nick Duffek
2001-07-16 16:42 ` Mark Salter [this message]
[not found] ` <200107161931.f6GJVV719853.cygnus.project.sid@rtl.cygnus.com>
2001-07-16 15:05 ` Frank Ch. Eigler
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