Re: Infinite backtrace on arm

[Daniel Jacobowitz <drow@mvista.com>]

On Mon, Oct 27, 2003 at 10:21:54AM -0500, Andrew Cagney wrote:
> >The problem is that there's not much GDB can do with hand-coded
> >assembly functions.
> >
> >However, GDB ought to be able to detect and stop that loop without any
> >of this.  It seems to me that the problem is not two frames with the
> >same PC, but two frames with their PC "saved" in the same place - i.e.
> >GDB failing to figure out where the PC is saved.  This is made a little
> >tricky in current versions of GDB, because the PC is normally unwound
> >using frame_pc_unwind (which doesn't tell us where it was saved, since
> >the interface doesn't assume it's a single normal register), and the
> >core code doesn't have a concept of a "PC register" any more.
> >
> >Andrew, any idea on how to do this?
> 
> Before anything else, find out what a current GDB does - its code to 
> detect a "corrupt stack" is now much improved.

I'll check - I don't have my test for this problem handy any more but I
know as of a month or two ago the problem still existed.

-- 
Daniel Jacobowitz
MontaVista Software                         Debian GNU/Linux Developer