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Subject: RE: RFA [PATCH v3] Implement 'catch syscall' for gdbserver
From: Philippe Waroquiers <philippe.waroquiers@skynet.be>
To: "Agovic, Sanimir" <sanimir.agovic@intel.com>
Cc: "gdb-patches@sourceware.org" <gdb-patches@sourceware.org>
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References: <1379796907.5980.20.camel@soleil>	 <0377C58828D86C4588AEEC42FC3B85A717680EC1@IRSMSX105.ger.corp.intel.com>
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Date: Mon, 23 Sep 2013 19:32:00 -0000
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On Mon, 2013-09-23 at 11:50 +0000, Agovic, Sanimir wrote:
> Hello Philippe,
> 

> > +  if (the_low_target.get_syscall_trapinfo == NULL)
> > +    {
> > +      *sysno = 0;
> > +      *sysret = 0;
> > +      return;
> > +    }
> >
> Is it sufficient to assign sysno/sysret to 0 to indicate missing 'catch syscall'
> functionality? Both values seem legal to me.
The idea is that will be used in case the user forces the use of the
QCatchSyscalls packet. So, I think it is better to return "valid" (but
not used) values : I do not think there is a syscall nr 0.

Philippe