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Date: Fri, 31 Dec 2010 14:37:29 +0100
From: John Marino <freebsdml@marino.st>
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To: Kostik Belousov <kostikbel@gmail.com>
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Cc: freebsd-threads@freebsd.org
Subject: Re: AMD64 version of GNAT Ada compiler broken due to libthr
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Yeah, that's kind of what I was getting at.  Would this patch get into 
FreeBSD 8.2, and would that mean that GNAT would start working properly 
starting with FreeBSD 8.2 if that happened?

I guess that also means the other BSD's have been allowing executable 
stacks all along.

Thanks!


Kostik Belousov wrote:
> This means that the Ada complier or tasking library uses on-stack
> trampolines for something. Since FreeBSD threads on amd64 get
> non-executable stacks, the tasking fails.
> 
> The proper solution is to provide a support for conditional
> non-executable stacks, as described in
> http://lists.freebsd.org/pipermail/freebsd-arch/2010-November/010826.html
> The latest WIP patch is
> http://people.freebsd.org/~kib/misc/nxstacks.3.patch
> I hope to get something in the tree not too long.
>