Re: [Xen-devel] [PATCH v13 1/3] x86emul: New return code for unimplemented instruction

[Petre Ovidiu PIRCALABU <ppircalabu@xxxxxxxxxxxxxxx>]

On Lu, 2017-10-02 at 15:09 +0100, George Dunlap wrote:
> On 10/02/2017 02:43 PM, George Dunlap wrote:
> > 
> > On 09/25/2017 01:03 PM, Petre Pircalabu wrote:
> > > 
> > > Enforce the distinction between an instruction not implemented by
> > > the
> > > emulator and the failure to emulate that instruction by defining
> > > a new
> > > return code, X86EMUL_UNIMPLEMENTED.
> > > 
> > > This value should only be returned by the core emulator only if
> > > it fails to
> > > properly decode the current instruction's opcode, and not by any
> > > of other
> > > functions, such as the x86_emulate_ops or the hvm_io_ops
> > > callbacks.
> > Oh, minor comment:  Should this paragraph be changed to match the
> > comment in the patch itself?  I.e.:
> > 
> > "This value should only be returned by the core emulator when a
> > valid
> > opcode is found but the execution logic for that instruction is
> > missing.
> > It should NOT be returned by any of the x86_emulate_ops callbacks."
I've changed the comment from the definition multiple times and I
forgot to update the patch comment. Indeed, the newest description
better reflects the current usage of X86EMUL_UNIMPLEMENTED.
> I'll do this on check-in if I don't hear any objections by tomorrow.
> 
>  -George
Many thanks for your support,
Petre
> 
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