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From: Andrew Lutomirski <luto@mit.edu>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: x86@kernel.org, Andi Kleen <andi@firstfloor.org>,
	linux-kernel@vger.kernel.org, torvalds@linux-foundation.org,
	lueckintel@yahoo.com, kimwooyoung@gmail.com,
	Ingo Molnar <mingo@elte.hu>, Borislav Petkov <bp@alien8.de>
Subject: Re: [PATCH 3/3] x86-64: Rework vsyscall emulation and add vsyscall= parameter
Date: Wed, 10 Aug 2011 13:47:13 -0400	[thread overview]
Message-ID: <CAObL_7Ge7PDSqt8sfBAODDnuA34oCsA4Lat24RXGe1DPAKdXqA@mail.gmail.com> (raw)
In-Reply-To: <4E42BDFF.5060507@zytor.com>

On Wed, Aug 10, 2011 at 1:21 PM, H. Peter Anvin <hpa@zytor.com> wrote:
> On 08/10/2011 10:15 AM, Andy Lutomirski wrote:
>> There are three choices:
>>
>> vsyscall=native: Vsyscalls are native code that issues the
>> corresponding syscalls.
>>
>> vsyscall=emulate (default): Vsyscalls are emulated by instruction
>> fault traps, tested in the bad_area path.  The actual contents of
>> the vsyscall page is the same as the vsyscall=native case except
>> that it's marked NX.  This way programs that make assumptions about
>> what the code in the page does will not be confused when they read
>> that code.
>>
>> vsyscall=none: Trying to execute a vsyscall will segfault.
>>
>> Signed-off-by: Andy Lutomirski <luto@mit.edu>
>
> Hi Andy,
>
> This patch doesn't apply.  What is your baseline for this patch?

My baseline was a commit that probably only lives in my tree, but the
patches should apply cleanly on top of
c149a665ac488e0dac22a42287f45ad1bda06ff1, which is the current
tip/x86/vdso.

--Andy

  reply	other threads:[~2011-08-10 17:47 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-08-10 15:15 [PATCH 0/3] vsyscall emulation compatibility fixes Andy Lutomirski
2011-08-10 15:15 ` [PATCH 1/3] x86: Remove unnecessary compile flag tweaks for vsyscall code Andy Lutomirski
2011-08-11  0:01   ` [tip:x86/vdso] " tip-bot for Andy Lutomirski
2011-08-10 15:15 ` [PATCH 2/3] x86-64: Wire up getcpu syscall Andy Lutomirski
2011-08-11  0:01   ` [tip:x86/vdso] " tip-bot for Andy Lutomirski
2011-08-11  0:31   ` tip-bot for Andy Lutomirski
2011-08-10 15:15 ` [PATCH 3/3] x86-64: Rework vsyscall emulation and add vsyscall= parameter Andy Lutomirski
2011-08-10 17:21   ` H. Peter Anvin
2011-08-10 17:47     ` Andrew Lutomirski [this message]
2011-08-10 21:14       ` H. Peter Anvin
2011-08-10 21:18         ` Andrew Lutomirski
2011-08-10 22:20           ` H. Peter Anvin
2011-08-10 22:56             ` Andrew Lutomirski
2011-08-11  0:02   ` [tip:x86/vdso] " tip-bot for Andy Lutomirski
2011-08-11  0:31   ` tip-bot for Andy Lutomirski

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