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Re: can target code change architecture setting?

From: Tim Newsome <tim at sifive dot com>
To: duane at duaneellis dot com
Cc: Yao Qi <qiyaoltc at gmail dot com>, gdb <gdb at sourceware dot org>
Date: Mon, 10 Oct 2016 12:46:25 -0700
Subject: Re: can target code change architecture setting?
Authentication-results: sourceware.org; auth=none
References: <20161010094844.5c1bb9f86d671edec44bb378f25c04cc.aef8a9655c.wbe@email03.godaddy.com>

On Mon, Oct 10, 2016 at 9:48 AM,  <duane@duaneellis.com> wrote:

> Question #1 Is this dual mode possible in RISCV?

Not currently, and I don't think there will be a dual mode.

There was a proposal that should allow 32-bit code to just work on
64-bit architectures, but I'm pretty sure it was not by adding a
different mode. It sounded more like the MIPS model where the ISA is
cleverly defined to not care. But unfortunately I can't find the
e-mail thread right now.

> Question #2 - How should the remote debugger respond to GDB?

For RISCV, what I would want is for it to tell GDB that it's running
on 64-bit hardware, because it is. I see no reason to hide from the
user what's actually happening in the hardware.

Tim

References:
- RE: can target code change architecture setting?
  - From: duane

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