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Re: [Qemu-devel] Single stepping & GDB on ARM

From: Peter Maydell
Subject: Re: [Qemu-devel] Single stepping & GDB on ARM
Date: Tue, 17 Sep 2013 09:51:27 +0100

On 17 September 2013 09:47, Emmanuel Blot <address@hidden> wrote:
> I noticed that cpu_unassigned_access() is not implemented on ARM. Is
> this a missing feature - yet to be implemented, or something that
> cannot be supported on ARM plartform for some reason?

No, it should cause an external abort exception, really. It's
just nobody's needed it (guest OSes should never do anything
that provokes an external abort unless they're buggy) so nobody's
bothered doing it yet. Also when it's added various boards need
testing to see how much they're relying on the current "unassigned
RAM returns 0" to cover up for missing device models, which
is a bit tedious given how many boards we have.

-- PMM

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