From owner-freebsd-arm@FreeBSD.ORG  Fri Sep 13 19:51:48 2013
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Subject: Re: Panic while building perl on sheevaplug/armv5 freebsd 10.
From: Ian Lepore <ian@FreeBSD.org>
To: Adrian Chadd <adrian@FreeBSD.org>
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Cc: "freebsd-arm@freebsd.org" <freebsd-arm@FreeBSD.org>,
 Ronald Klop <ronald-freebsd8@klop.yi.org>
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On Fri, 2013-09-13 at 12:44 -0700, Adrian Chadd wrote:
> .. don't we have a guard page on ARM/MIPS so we can trap out whenever that
> occurs?
> 
> That way we can at least try to identify where people have made some "huh
> we're running on amd64, stack space is cheap huh" assumptions?
> 

A "page-not-mapped" fault with a stack-looking address (0xddf9d000) is
what happened -- my theory is that we hit the guard page.

-- Ian