From: Sylvain Joyeux <sylvain.joyeux@...4x.org>
Date: 2009-01-07T03:50:26+09:00
Subject: [ruby-core:21173] Re: [PATCH] Update to MBARI patches on 1.8.7-p72

Thanks Brent for this work.

One problem: the way you are getting the SP through alloca() is
architecture-specific. On PPC, there is data between the alloca() space
and the stack pointer, and your stack-wiping patch clears that data as
well (which, among other things, includes the return address).

I did a patch against MBARI6 for that, you can see it here:

  http://github.com/doudou/ruby/commit/0cd9b81d8ba8cc1de18563207e252cde9f76adac

I'll update to MBARI7 as soon as possible

Sylvain