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Re: FP vs SP

Ah, I see it now - thanks!


----- Original Message ----- 
From: "Daniel Jacobowitz" <>
To: "Jafa" <>
Cc: <>
Sent: Friday, September 05, 2003 4:03 PM
Subject: Re: FP vs SP

> *This message was transferred with a trial version of CommuniGate(tm) Pro*
> On Fri, Sep 05, 2003 at 03:44:13PM -0700, Jafa wrote:
> > Hi all,
> >
> > I recently updated the ip2k gdb port to use the new frame handling
> > in gdb.
> >
> > It can reliably do a stack backtrace and can reliably step-over etc.
> >
> > The one problem is that all local variables show up as garbage.
> >
> > I have looked into this and it seams that GDB is using the frame-pointer
> > (aka SP as at the entry point of the function) as the reference point
> > the stack offset of the local variables. Is this correct or have I
> > up something in my frame handling code?
> >
> > Looking at the stabs information coming out of gcc (2.97) the offsets
> > all specified as being relative to the nominal SP (stack pointer at the
> > start of any c-line)... is this correct or should it be giving FP
> > addresses?
> You can control what GDB does here by defining a frame base method -
> see frame-base.h.  Probably you've changed the meaning of
> get_frame_locals_address ().
> -- 
> Daniel Jacobowitz
> MontaVista Software                         Debian GNU/Linux Developer

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