From: Mark Kettenis <kettenis@chello.nl>
To: rth@twiddle.net
Cc: Andrew Cagney <ac131313@redhat.com>, gdb@sources.redhat.com
Subject: Re: [RFA] fix dwarf2 unwind of pc
Date: Sun, 01 Jun 2003 09:44:00 -0000 [thread overview]
Message-ID: <86k7c6cet9.fsf@elgar.kettenis.dyndns.org> (raw)
In-Reply-To: Richard Henderson's message of "Sat, 31 May 2003 21:27:45 -0700"
Richard Henderson <rth@redhat.com> writes:
> On Sat, May 31, 2003 at 10:48:01PM -0400, Andrew Cagney wrote:
> > The loss of control is likely from a dud return address (used for
> > setting the return breakpoint) being computed when the the code is first
> > stepped into dummy().
>
> Indeed, a problem with the new dwarf2 unwinder. Neither of the
> targets Mark tested have the return address in a register. Ok?
>
> r~
>
> * dwarf2-frame.c (dwarf2_frame_cache): Handle retaddr_column
> not overlapping PC_REGNUM.
Ah, GCC is trying to be economical here. From reading the DWARF
standard I would have expected the compiler to have emitted CFA
instructions that actually put something in the return address column.
Anyway, this shouldn't hurt.
Approved.
Mark
prev parent reply other threads:[~2003-06-01 9:44 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-06-01 1:37 tracking "next" failure? Richard Henderson
2003-06-01 2:48 ` Andrew Cagney
2003-06-01 4:29 ` [RFA] fix dwarf2 unwind of pc Richard Henderson
2003-06-01 9:44 ` Mark Kettenis [this message]
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