From: David Mosberger <davidm@napali.hpl.hp.com>
To: linux-ia64@vger.kernel.org
Subject: Re: [Linux-ia64] Re: gas generates incorrect ia64 unwind rlen values
Date: Tue, 17 Dec 2002 03:25:39 +0000 [thread overview]
Message-ID: <marc-linux-ia64-105590709805593@msgid-missing> (raw)
In-Reply-To: <marc-linux-ia64-105590709805569@msgid-missing>
Keith> I used gcc 2.96 20000731 (Red Hat Linux 7.1 2.96-101) to
Keith> convert traps.c to traps.S, then extracted the headers and
Keith> ia64_fault for testing against gas. traps.S only has one
Keith> body. I wanted to avoid dumping 530+ lines to the list but
Keith> ...
Keith> Interesting that a different gcc which generates two bodies
Keith> gets valid unwind data, but this code with only one body
Keith> generates invalid unwind data. David, what does your unwind
Keith> data look like after assembling this code?
Why do you insist on re-discovering old bugs? For the code in
question, the problem is caused by the jump-table generated for the
switch-statement. gcc 2.9x placed jump-tables in the text section,
which violates the ia64 ABI and also confuses the assembler.
--david
next prev parent reply other threads:[~2002-12-17 3:25 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-12-16 9:00 [Linux-ia64] Re: gas generates incorrect ia64 unwind rlen values Keith Owens
2002-12-16 22:12 ` Keith Owens
2002-12-16 22:12 ` David Mosberger
2002-12-16 22:16 ` David Mosberger
2002-12-16 23:10 ` Jim Wilson
2002-12-17 2:34 ` Keith Owens
2002-12-17 2:51 ` David Mosberger
2002-12-17 3:19 ` David Mosberger
2002-12-17 3:20 ` Keith Owens
2002-12-17 3:25 ` David Mosberger [this message]
2002-12-17 3:43 ` Keith Owens
2002-12-17 16:33 ` Patil, Harish
2002-12-19 20:19 ` David Mosberger
2002-12-20 1:46 ` [Linux-ia64] Re: gas generates incorrect ia64 unwind rlen val Patil, Harish
2003-01-18 2:30 ` David Mosberger
2003-03-07 22:28 ` [Linux-ia64] Re: gas generates incorrect ia64 unwind rlen val ues Bjorn Helgaas
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