From: Randolph Chung <randolph@tausq.org>
To: Joel Brobecker <brobecker@adacore.com>
Cc: gdb-patches@sources.redhat.com
Subject: Re: [RFC/RFA/hppa] unwind pc in bottom frame using correct register
Date: Sat, 04 Dec 2004 10:53:00 -0000 [thread overview]
Message-ID: <20041204084624.GS6359@tausq.org> (raw)
In-Reply-To: <20041204075101.GS16491@adacore.com>
> Almost works. We get the first frame right, but then the backtraces
> are broken because we get identical frames. This sort of makes sense
> to me, since once you are past frame 0, you know which register to
> unwind by inspecting the function associated to the frame (either prologue
> analysis, or using the unwind info, or ...). No? So I would venture
> that the SS_INSYSCALL thingy might be specific to the innermost frame?
hrm, yes.... you are right.
> > the bit about HPPA_FLAG_REGNUM seems to be an hpux specific thing. I
> > think the syscall stub does something special so we try to return r31
> > instead of pcoqh. I haven't looked at this in detail...
>
> If it's HP/UX specific, it must be hurting hppa-linux?
well, on hppa-linux the "flags" register is always 0, so we always read
pcoqh.
as you said i think we need to first better understand what is this
SS_INSYSCALL thing....
randolph
--
Randolph Chung
Debian GNU/Linux Developer, hppa/ia64 ports
http://www.tausq.org/
next prev parent reply other threads:[~2004-12-04 8:46 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-12-04 5:31 Joel Brobecker
2004-12-04 7:51 ` Randolph Chung
2004-12-04 8:46 ` Joel Brobecker
2004-12-04 10:53 ` Randolph Chung [this message]
2004-12-04 12:42 ` Mark Kettenis
2004-12-08 4:33 ` Randolph Chung
2004-12-08 8:21 ` Randolph Chung
2004-12-08 22:20 ` Mark Kettenis
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