linux-kernel - Re: [GIT PULL] x86 fixes

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Message-ID: <55D6FAA6.7020307@redhat.com>
Date:	Fri, 21 Aug 2015 12:17:10 +0200
From:	Denys Vlasenko <dvlasenk@...hat.com>
To:	Ingo Molnar <mingo@...nel.org>, "H. Peter Anvin" <hpa@...or.com>
CC:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Juergen Gross <jgross@...e.com>,
	Andy Lutomirski <luto@...nel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Brian Gerst <brgerst@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [GIT PULL] x86 fixes

On 08/19/2015 08:50 AM, Ingo Molnar wrote:
> I get some instances of:
> 
>    /etc/rc3.d/S99local: line 26:  1626 Illegal instruction 
> 
> due to user-space presuming modern FPU capabilities:
> 
>   Program received signal SIGILL, Illegal instruction.                                                                                                                                  
>   0xb76be371 in RAND_SSLeay () from /lib/libcrypto.so.6                    
> 
>   0xb76be371 <RAND_SSLeay+1297>:  fucomip %st(1),%st
> 
> FUCOMPIP is a P6+ FPU instruction.

I have a patch which adds support for emulating it. Will post now.

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