From: Rich Felker <dalias@libc.org>
To: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com>
Cc: Andy Lutomirski <luto@amacapital.net>,
Matthew Fortune <Matthew.Fortune@imgtec.com>,
David Daney <david.s.daney@gmail.com>,
David Daney <ddaney@caviumnetworks.com>,
David Daney <ddaney.cavm@gmail.com>,
"libc-alpha@sourceware.org" <libc-alpha@sourceware.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-mips@linux-mips.org" <linux-mips@linux-mips.org>,
David Daney <david.daney@cavium.com>
Subject: Re: [PATCH resend] MIPS: Allow FPU emulator to use non-stack area.
Date: Tue, 7 Oct 2014 15:21:07 -0400 [thread overview]
Message-ID: <20141007192107.GN23797@brightrain.aerifal.cx> (raw)
In-Reply-To: <54343C2B.2080801@imgtec.com>
On Tue, Oct 07, 2014 at 12:16:59PM -0700, Leonid Yegoshin wrote:
> On 10/07/2014 12:09 PM, Rich Felker wrote:
> >I agree completely here. We should not break things (or, as it
> >seems, leave them broken) for common usage cases that affect
> >everyone just to coddle proprietary vendor-specific instructions.
> >The latter just should not be used in delay slots unless the chip
> >vendor also promises to provide fpu branch in hardware. Rich
> And what do you propose - remove a current in-stack emulation and
> you still think it doesn't break a status-quo?
The in-stack trampoline support could be left but used only for
emulating instructions the kernel doesn't know. This would make all
normal binaries immediately usable with non-executable stack, and
would avoid the only potential source of regressions. Ultimately I
think the "xol" stuff should be removed, but that could be a long term
goal.
Rich
next prev parent reply other threads:[~2014-10-07 19:22 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-06 20:23 David Daney
2014-10-06 20:54 ` Rich Felker
2014-10-06 21:18 ` David Daney
2014-10-06 21:31 ` Rich Felker
2014-10-06 21:45 ` David Daney
2014-10-06 21:58 ` Rich Felker
2014-10-06 22:17 ` David Daney
2014-10-06 23:08 ` Rich Felker
2014-10-06 23:38 ` Andy Lutomirski
2014-10-06 23:48 ` David Daney
2014-10-06 23:54 ` Andy Lutomirski
2014-10-07 0:05 ` Rich Felker
2014-10-07 0:11 ` Andrew Pinski
2014-10-07 0:21 ` Rich Felker
2014-10-07 0:28 ` Andrew Pinski
2014-10-07 0:29 ` Andy Lutomirski
2014-10-07 0:32 ` David Daney
2014-10-07 0:33 ` David Daney
2014-10-07 0:48 ` Andy Lutomirski
2014-10-07 0:49 ` Rich Felker
2014-10-07 4:50 ` David Daney
2014-10-07 9:13 ` Matthew Fortune
2014-10-07 10:52 ` James Hogan
2014-10-07 11:19 ` Rich Felker
2014-10-07 16:04 ` David Daney
2014-10-07 18:32 ` Leonid Yegoshin
2014-10-07 18:43 ` David Daney
2014-10-07 19:13 ` Leonid Yegoshin
2014-10-07 18:44 ` Andy Lutomirski
2014-10-07 18:50 ` David Daney
2014-10-07 19:09 ` Rich Felker
2014-10-07 19:16 ` Leonid Yegoshin
2014-10-07 19:21 ` Rich Felker [this message]
2014-10-07 19:27 ` Leonid Yegoshin
2014-10-07 19:28 ` Andy Lutomirski
2014-10-07 20:03 ` David Daney
2014-10-08 0:22 ` Andy Lutomirski
2014-10-07 19:40 ` Matthew Fortune
2014-10-07 11:11 ` Rich Felker
2014-10-07 16:08 ` David Daney
2014-10-07 18:16 ` Andy Lutomirski
2014-10-07 23:20 ` Ralf Baechle
2014-10-07 23:59 ` David Daney
2014-10-08 0:18 ` Chuck Ebbert
2014-10-08 2:37 ` Rich Felker
2014-10-08 10:31 ` Paul Burton
2014-10-07 1:02 ` Kevin D. Kissell
2014-10-07 1:38 ` Rich Felker
2014-10-07 4:32 ` David Daney
2014-10-07 11:53 ` James Hogan
2014-10-07 12:22 ` James Hogan
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