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From: Peter Maydell <peter.maydell@linaro.org>
To: Sandra Loosemore <sandra@codesourcery.com>
Cc: QEMU Developers <qemu-devel@nongnu.org>, Marek Vasut <marex@denx.de>
Subject: Re: [Qemu-devel] [PATCH v5 2/2] Add Nios II semihosting support.
Date: Fri, 8 Mar 2019 16:04:46 +0000	[thread overview]
Message-ID: <CAFEAcA92mHFcPoNtsHJqUTzfjxvXh4CpjEy_=irMYu9gEpg=2Q@mail.gmail.com> (raw)
In-Reply-To: <7d4097aa-4888-82f6-3e4e-eeeb8de9f55b@codesourcery.com>

On Fri, 8 Mar 2019 at 03:13, Sandra Loosemore <sandra@codesourcery.com> wrote:
>
> On 3/7/19 7:58 AM, Peter Maydell wrote:
> > On Wed, 13 Feb 2019 at 04:02, Sandra Loosemore <sandra@codesourcery.com> wrote:
> >>
> >> This patch adds support for libgloss semihosting to Nios II bare-metal
> >> emulation.
> >>
> >> Signed-off-by: Sandra Loosemore <sandra@codesourcery.com>
> >> Signed-off-by: Julian Brown <julian@codesourcery.com>
> >
> > Do you have a link to the spec that defines this semihosting
> > ABI, please ?
>
> Well, I just wrote some derived from the comments in the libgloss
> sources; see the attachment.  :-)

Thanks. So who "owns" this ABI (ie has the authority to change
it and should be the end documenting it)? How many projects or
bits of software are implementing either end of it?

If we decide that QEMU owns the spec we can put the documentation
into docs/specs/.

> FWIW this is pretty much a direct copy of the m68k semihosting protocol,
> which CodeSourcery contributed ages ago to both libgloss and qemu.

Yeah, and that seems to be undocumented too :-(  I'm not a huge
fan of "this is just some random thing that's private to QEMU
and libgloss".

thanks
-- PMM

  reply	other threads:[~2019-03-08 16:05 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-02-13  3:45 [Qemu-devel] [PATCH v5 0/2] Nios II generic board config and semihosting Sandra Loosemore
2019-02-13  3:45 ` [Qemu-devel] [PATCH v5 1/2] Add generic Nios II board Sandra Loosemore
2019-03-07 14:57   ` Peter Maydell
2019-03-08 23:51     ` Sandra Loosemore
2019-03-09 14:27       ` Peter Maydell
2019-02-13  3:46 ` [Qemu-devel] [PATCH v5 2/2] Add Nios II semihosting support Sandra Loosemore
2019-03-07 14:58   ` Peter Maydell
2019-03-08  3:13     ` Sandra Loosemore
2019-03-08 16:04       ` Peter Maydell [this message]
2019-03-08 17:01         ` Sandra Loosemore
2019-03-08 18:21           ` Peter Maydell

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