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Re: [Xen-devel] [PATCH][XEN] __trap_to_gdb should return something diffe

To: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
Subject: Re: [Xen-devel] [PATCH][XEN] __trap_to_gdb should return something different
From: Jimi Xenidis <jimix@xxxxxxxxxxxxxx>
Date: Mon, 25 Sep 2006 09:27:15 -0400
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On Sep 23, 2006, at 1:18 PM, Keir Fraser wrote:

On 22/9/06 4:07 pm, "Jimi Xenidis" <jimix@xxxxxxxxxxxxxx> wrote:

--text follows this line--

This patch allows the caller to find out if the gdbstub actually did

Signed-off-by: Jimi Xenidis <jimix@xxxxxxxxxxxxxx>

What different actions do you envisage the caller will take? If they are reasonable, perhaps they should be explicitly specified in a return- code

Currently there are two failure cases:
  1) GDB had no transport available for its use (UART or otherwise)
2) "unexpected trap", usually another trap occurs while gdb is in control

I suppose we could have (1) -EIO and (2) -EBUSY.
My logic was that either gdb was available or not and that I needed to continue as if gdb was not enabled at all.


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