RE: [ECOS] Entering GDB stubs from an application

[Gary Thomas <gary at mlbassoc dot com>]

On Thu, 2003-09-04 at 13:09, Doyle, Patrick wrote:
> Thanks Gary,
> The problem is 'breakpoint()' is undefined (at link time).  I guess I'll try
> including GDB stubs in my application (instead of relying on RedBoot) --
> perhaps that will make it be defined.
> 
> --wpd

Or just look in the appropriate hal_arch.h file and define it yourself
for this purpose.  After all, this is only for debugging.

> 
> 
> > -----Original Message-----
> > From: Gary Thomas [mailto:gary@mlbassoc.com] 
> > Sent: Thursday, September 04, 2003 3:02 PM
> > To: Doyle, Patrick
> > Cc: eCos Discussion
> > Subject: Re: [ECOS] Entering GDB stubs from an application
> > 
> > 
> > On Thu, 2003-09-04 at 13:00, Doyle, Patrick wrote:
> > > I am trying to track down a problem right now and I would 
> > like to drop my
> > > application into GDB stubs when an external event happens.  
> > (I have to use
> > > the serial port to configure and control the application, 
> > but I want to go
> > > in after the fact and poke around).  I tried accessing 
> > non-existent memory
> > > and dividing by zero, neither of which dropped me into GDB 
> > stubs.  I tried
> > > reading the CDL for an option that looked like it would do 
> > the trick, but
> > > came up empty (after trying a few things) there too, so now 
> > I turn to you.
> > > 
> > > I think I have run into a case where the kernel is helping 
> > me by ignoring
> > > the exception.  In a production system, I think that's a 
> > great idea (I don't
> > > want the production system to drop into GDB stubs for no 
> > apparent (to the
> > > end user) reason), but in this case, I would like to force 
> > it to happen.
> > > 
> > > Any ideas?
> > > 
> > > Since I wrote the HAL myself, it is possible/likely that I 
> > missed something.
> > 
> > Try 'breakpoint()' - this should cause an immediate entry 
> > into GDB.   If
> > you then want to continue, you'll have to advance the PC 
> > manually over 
> > the breakpoint instruction.
> > 
> > -- 
> > Gary Thomas <gary@mlbassoc.com>
> > MLB Associates
> > 
-- 
Gary Thomas <gary@mlbassoc.com>
MLB Associates


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