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Re: Cannot unwind through MIPS signal frames with ICACHE_REFILLS_WORKARO

To: David Daney <ddaney@avtrex.com>
Subject: Re: Cannot unwind through MIPS signal frames with ICACHE_REFILLS_WORKAROUND_WAR
From: Franck Bui-Huu <vagabon.xyz@gmail.com>
Date: Sat, 17 Nov 2007 09:38:29 +0100
Cc: Ralf Baechle <ralf@linux-mips.org>, linux-mips@linux-mips.org
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David Daney wrote:
> I am liking the idea of putting the trampoline code in the (as of yet
> non-existent vdso).  This eliminates the need to flush the icache, but
> maintains the ability of user code to unwind through signal frames.
> 
> Putting a .eh_frame section in the vdso would be even better as that
> would eliminate the need for libgcc to do code reading and let the
> kernel use any means desired to return from signal handlers.
> 

You're very welcome to improve the ld script for VDSO generation, I
sent a couple days ago. I would be happy to integrate your
improvements in my patch for the future version.

thanks,
                Franck




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