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Message-ID: <CACsECNcKJzC+uZuVCkLqabC3KDckq7OJNv76WX7EiaXvE6xrKQ@mail.gmail.com>
Date: Wed, 14 Oct 2015 21:23:59 +0200
From: Alex <alexinbeijing@...il.com>
To: musl@...ts.openwall.com
Subject: Re: [PATCHv3 1/3] fix matching errors for overwritten
registers in x86 CFI generation script
On Wed, Oct 14, 2015 at 9:14 PM, Rich Felker <dalias@...c.org> wrote:
> On Wed, Oct 14, 2015 at 12:21:05PM +0200, Alex wrote:
> > This has been an interesting exercise so far. Is there any other arch
> which
> > you think it would be worthwhile to develop a CFI generation script for?
> It
> > should be something which has enough users to avoid problems with bitrot.
>
> CFI is probably a lot less interesting on archs where you have a
> plenty registers not to need to manipulate stack frames in asm
> functions, since in that case the debugger mostly works fine without
> CFI. I don't know right off which of the other archs have significant
> amounts of asm that adjusts the stack pointer, but you could go
> through and check them. Having ABI info for them all would be helpful;
> I'm pasting my draft ABI reference (which might have errors) below.
Fair enough. If it's not likely to help anyone, I'll leave the CFI
generation here.
Another idea: are you interested in an implementation of POSIX AIO which
uses the native AIO syscalls? Bad idea?
Thanks, AD
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