From: Daniel Jacobowitz <drow@mvista.com>
To: Jafa <jafa@silicondust.com>
Cc: gdb@sources.redhat.com
Subject: Re: FP vs SP
Date: Fri, 05 Sep 2003 23:03:00 -0000 [thread overview]
Message-ID: <20030905230319.GA30712@nevyn.them.org> (raw)
In-Reply-To: <003301c373ff$3a923160$0502a8c0@scenix.com>
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 support
> 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 for
> the stack offset of the local variables. Is this correct or have I screwed
> up something in my frame handling code?
>
> Looking at the stabs information coming out of gcc (2.97) the offsets are
> 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 relative
> 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
next prev parent reply other threads:[~2003-09-05 23:03 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-09-05 22:44 Jafa
2003-09-05 23:03 ` Daniel Jacobowitz [this message]
2003-09-05 23:08 ` Jafa
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