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Re: [PowerPC] Fix eh unwind segfault

From: Christoph Hellwig <hch at infradead dot org>
To: Richard Henderson <rth at redhat dot com>, gcc-patches at gcc dot gnu dot org
Date: Tue, 31 Aug 2004 10:18:19 +0100
Subject: Re: [PowerPC] Fix eh unwind segfault
References: <20040831050014.GD26692@bubble.modra.org> <20040831063052.GB4751@redhat.com>

On Mon, Aug 30, 2004 at 11:30:52PM -0700, Richard Henderson wrote:
> Short of hardware for speculative loads, the only plausible option
> would have been using mincore and praying you don't hit an munmap
> race condition.  Except that linux after 2.2 has a bug in which
> anonymous pages are *not* reported as present in core.  Which 
> includes the stack, and so makes it entirely worthless for this
> particular problem.

Linux 2.2 doesn't implement mincore at all.  Up to current Linux 2.6
mincore for anonymous mappings isn't implemented.

References:
- [PowerPC] Fix eh unwind segfault
  - From: Alan Modra
- Re: [PowerPC] Fix eh unwind segfault
  - From: Richard Henderson

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