From: Andy Lutomirski <luto@amacapital.net>
To: Chuck Ebbert <cebbert.lkml@gmail.com>, Anish Bhatt <anish@chelsio.com>
Cc: linux-kernel@vger.kernel.org, x86@kernel.org, tglx@linutronix.de,
mingo@redhat.com, hpa@zytor.com, sebastian@fds-team.de
Subject: Re: [PATCH] x86 : Ensure X86_FLAGS_NT is cleared on syscall entry
Date: Mon, 29 Sep 2014 10:30:31 -0700 [thread overview]
Message-ID: <54299737.50701@mit.edu> (raw)
In-Reply-To: <20140925180005.356089de@as>
On 09/25/2014 04:00 PM, Chuck Ebbert wrote:
> #include <stdio.h>
> #include <unistd.h>
>
> int main()
> {
> asm volatile("pushfq \n\t" \
> "pop %rax \n\t" \
> "or $0x4000,%rax \n\t" \
> "push %rax \n\t" \
> "popfq \n\t");
You're missing clobbers here. But fixing that has no effect.
> sleep(1);
>
> return 0;
> }
next prev parent reply other threads:[~2014-09-29 17:30 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-25 19:42 [PATCH] x86 : Ensure X86_FLAGS_NT is cleared on syscall entry Anish Bhatt
2014-09-25 23:00 ` Chuck Ebbert
2014-09-29 17:30 ` Andy Lutomirski [this message]
2014-09-26 22:00 ` Chuck Ebbert
2014-09-26 22:10 ` Anish Bhatt
2014-09-26 23:32 ` Linus Torvalds
2014-09-29 17:40 ` Andy Lutomirski
2014-09-29 18:30 ` Sebastian Lackner
2014-09-29 18:43 ` Andy Lutomirski
2014-09-29 19:33 ` Thomas Gleixner
2014-09-29 19:41 ` Sebastian Lackner
2014-09-29 19:51 ` Thomas Gleixner
2014-09-29 18:59 ` Thomas Gleixner
2014-09-29 19:08 ` Andy Lutomirski
2014-09-29 19:17 ` Andy Lutomirski
2014-09-29 19:41 ` Thomas Gleixner
2014-09-29 19:43 ` H. Peter Anvin
2014-09-29 19:57 ` Thomas Gleixner
2014-09-29 20:01 ` H. Peter Anvin
2014-09-29 20:10 ` Thomas Gleixner
2014-09-29 20:29 ` Andy Lutomirski
2014-09-29 20:16 ` Andy Lutomirski
2014-09-29 21:37 ` Thomas Gleixner
2014-09-30 0:11 ` Andy Lutomirski
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