From: Andrew Cagney <cagney@gnu.org>
To: Richard.Earnshaw@arm.com
Cc: Daniel Jacobowitz <drow@mvista.com>, gdb-patches@sources.redhat.com
Subject: Re: RFA/ARM: Switch mode when setting PC
Date: Sat, 17 Jan 2004 16:36:00 -0000 [thread overview]
Message-ID: <40095C85.8090003@gnu.org> (raw)
In-Reply-To: <200401171049.i0HAnJ722639@pc960.cambridge.arm.com>
>> On Fri, Jan 16, 2004 at 02:12:18PM -0500, Andrew Cagney wrote:
>
>> > Or a lack of design, Arm needs to ensure that it doesn't define PC_REGNUM.
>
>>
>> OK, I'll keep that in mind.
>>
>
>> > >In the past we've tried to distinguish R15 from PC. This was especially
>> > >useful in the legacy 26-bit mode where the CPSR bits *were* in R15.
>
>>
>> Perhaps, in that case, we should have the PC as a pseudoregister. That
>> would simplify a lot of arm-tdep.c.
>
>
> That was my feeling too.
BTW, the user visible $pc is now typically per-frame and tied to the
"unwound return address". If that pseudo-register were made visible
things could get confusing.
Andrew
next prev parent reply other threads:[~2004-01-17 16:36 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-01-16 3:54 Daniel Jacobowitz
2004-01-16 5:43 ` Andrew Cagney
2004-01-16 14:10 ` Daniel Jacobowitz
2004-01-16 14:15 ` Richard Earnshaw
2004-01-16 14:26 ` Daniel Jacobowitz
2004-01-16 14:34 ` Richard Earnshaw
2004-01-16 14:41 ` Daniel Jacobowitz
2004-01-16 15:00 ` Richard Earnshaw
2004-01-16 15:56 ` Daniel Jacobowitz
2004-01-16 16:55 ` Richard Earnshaw
2004-01-16 17:11 ` Daniel Jacobowitz
2004-01-16 17:28 ` Richard Earnshaw
2004-01-16 19:12 ` Andrew Cagney
2004-01-16 17:32 ` Daniel Jacobowitz
2004-01-16 18:57 ` Andrew Cagney
2004-01-17 4:58 ` Daniel Jacobowitz
2004-01-17 10:49 ` Richard Earnshaw
2004-01-17 16:36 ` Andrew Cagney [this message]
2004-01-17 16:12 ` Andrew Cagney
2004-01-17 18:54 ` Daniel Jacobowitz
2004-01-17 21:59 ` Daniel Jacobowitz
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