From: Cary Coutant <cary@cup.hp.com>
To: linux-ia64@vger.kernel.org
Subject: Re: [Linux-ia64] Unwind problem for __attribute__ noreturn
Date: Wed, 21 Mar 2001 23:42:50 +0000 [thread overview]
Message-ID: <marc-linux-ia64-105590693005330@msgid-missing> (raw)
In-Reply-To: <marc-linux-ia64-105590693005303@msgid-missing>
>>In the case of a call to a "noreturn" procedure, I'll offer the opinion
>>that having the unwinder decrement the rp is not correct.
>
>Why? It isn't good enough to say that this is wrong. You should justify
>why you think it is wrong.
OK. The problem is that rp doesn't tell us where the branch is: even
excluding examples like Keith's, you don't know whether to back up one,
two, or three instruction slots. If you allow for the short-circuit
return, you're totally lost. The only reasonable assumption the unwinder
can make is that rp, being where control would normally resume in that
frame, is the address that determines the unwind state.
-cary
next prev parent reply other threads:[~2001-03-21 23:42 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-03-20 2:10 [Linux-ia64] Unwind problem for __attribute__ noreturn Keith Owens
2001-03-21 0:24 ` Jim Wilson
2001-03-21 6:03 ` Keith Owens
2001-03-21 6:53 ` David Mosberger
2001-03-21 7:12 ` Jim Wilson
2001-03-21 7:54 ` David Mosberger
2001-03-21 8:54 ` Keith Owens
2001-03-21 17:54 ` David Mosberger
2001-03-21 18:48 ` Cary Coutant
2001-03-21 19:07 ` Jim Wilson
2001-03-21 19:13 ` David Mosberger
2001-03-21 19:13 ` Jim Wilson
2001-03-21 19:26 ` Cary Coutant
2001-03-21 19:40 ` Jim Wilson
2001-03-21 19:58 ` David Mosberger
2001-03-21 20:00 ` Jim Wilson
2001-03-21 20:38 ` Jim Wilson
2001-03-21 22:54 ` David Mosberger
2001-03-21 23:42 ` Cary Coutant [this message]
2001-03-22 17:00 ` Rich Altmaier
2001-03-23 20:28 ` Jim Wilson
2001-03-24 0:58 ` Cary Coutant
2001-03-24 1:27 ` Keith Owens
2001-03-24 1:37 ` Jim Wilson
2001-03-26 22:06 ` DE-DINECHIN,CHRISTOPHE (HP-Cupertino,ex1)
2001-03-26 22:58 ` Cary Coutant
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