From: Stan Shebs <shebs@apple.com>
To: Kevin Buettner <kevinb@redhat.com>
Cc: gdb@sources.redhat.com
Subject: Re: LSI 33k ?
Date: Tue, 06 May 2003 18:27:00 -0000 [thread overview]
Message-ID: <3EB8007D.4050805@apple.com> (raw)
In-Reply-To: <1030506123427.ZM24517@localhost.localdomain>
It might never have worked, or the correct code might not be in CVS
anywhere.
I have a vague memory that it was for Array Technology ca 1992-3, and in
those
earlier days of Cygnus, some shipments were made "by hand", and not all
of the
customer's bits exactly corresponded with a CVS tag. remote-array.c
might also
have an answer in the form of jiggered-around register numbering.
Stan
Kevin Buettner wrote:
>Does anyone know anything about the LSI 33k? Okay, more specifically, did
>support for this core ever actually work in GDB?
>
>In mips-tdep.c, I see the following:
>
> /* Names of LSI 33k registers. */
>
> char *mips_lsi33k_reg_names[] = {
> "epc", "hi", "lo", "sr", "cause","badvaddr",
> "dcic", "bpc", "bda", "", "", "", "", "",
> "", "", "", "", "", "", "", "",
> ...
>
>With the exception of IRIX, the first line for all of the other regname
>sets look like this:
>
> "sr", "lo", "hi", "bad", "cause","pc",
>
>I'm not concerned about IRIX, because BADVADDR_REGNUM, CAUSE_REGNUM,
>PC_REGNUM, etc. are redefined in the appropriate tm-*.h file.
>
>The LSI 33k rearranges these registers, apparently even the PC_REGNUM
>value, but nowhere do I see a PC_REGNUM definition that's specific to
>the LSI 33k. This is bad because if the LSI 33k registers are really
>laid out as indicated by lsi33_reg_names[], then there's no way that
>GDB is actually obtaining the correct PC value whenever it uses PC_REGNUM.
>(It'll be using the "baddvaddr" value...)
>
>I thought for a while that perhaps the LSI 33k was simply bit-rotted,
>but after doing some digging in the old Cygnus CVS repository, I don't
>see how it could have ever worked.
>
>Does anyone know?
>
>Kevin
>
>
>
prev parent reply other threads:[~2003-05-06 18:27 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-05-06 12:34 Kevin Buettner
2003-05-06 18:27 ` Stan Shebs [this message]
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