On 09/12/2014 10:52 AM, Thomas Gleixner wrote:
>
> Well, I did not see the trainwreck which tried to use the generic
> decoder, but as I explained in the other mail, there is no reason not
> to use it and I can't see any complexity in retrieving the data beyond
> calling insn_get_length(insn);
>
On Thu, 11 Sep 2014, H. Peter Anvin wrote:
> On 09/11/2014 03:32 PM, Dave Hansen wrote:
> > On 09/11/2014 03:18 PM, Thomas Gleixner wrote:
> >> On Thu, 11 Sep 2014, Qiaowei Ren wrote:
> >>> This patch sets bound violation fields of siginfo struct in #BR
> >>> exception handler by decoding the
On Fri, 12 Sep 2014, H. Peter Anvin wrote:
> The correct limit is 15 bytes, not anything else, so this is a bug in
> the existing decoder. A sequence of bytes longer than 15 bytes will
Fine. Lets fix it there.
> #UD, regardless of being "otherwise valid".
> Keep in mind the instruction may not
On 09/12/2014 06:10 AM, Thomas Gleixner wrote:
>>
>> I'm not wedded to that concept, by the way, but using the generic parser had
>> a
>> whole bunch of its own problems, including the fact that you're getting bytes
>> from user space.
>
> Errm. The instruction decoder does not even know about
On Thu, 11 Sep 2014, H. Peter Anvin wrote:
> On 09/11/2014 04:37 PM, Thomas Gleixner wrote:
> > >
> > > Specifically because marshaling the data in and out of the generic
> > > decoder was more complex than a special-purpose decoder.
> >
> > I did not look at that detail and I trust your
On Thu, 11 Sep 2014, H. Peter Anvin wrote:
On 09/11/2014 04:37 PM, Thomas Gleixner wrote:
Specifically because marshaling the data in and out of the generic
decoder was more complex than a special-purpose decoder.
I did not look at that detail and I trust your judgement here, but
On 09/12/2014 06:10 AM, Thomas Gleixner wrote:
I'm not wedded to that concept, by the way, but using the generic parser had
a
whole bunch of its own problems, including the fact that you're getting bytes
from user space.
Errm. The instruction decoder does not even know about user space.
On Fri, 12 Sep 2014, H. Peter Anvin wrote:
The correct limit is 15 bytes, not anything else, so this is a bug in
the existing decoder. A sequence of bytes longer than 15 bytes will
Fine. Lets fix it there.
#UD, regardless of being otherwise valid.
Keep in mind the instruction may not be
On Thu, 11 Sep 2014, H. Peter Anvin wrote:
On 09/11/2014 03:32 PM, Dave Hansen wrote:
On 09/11/2014 03:18 PM, Thomas Gleixner wrote:
On Thu, 11 Sep 2014, Qiaowei Ren wrote:
This patch sets bound violation fields of siginfo struct in #BR
exception handler by decoding the user instruction
On 09/12/2014 10:52 AM, Thomas Gleixner wrote:
Well, I did not see the trainwreck which tried to use the generic
decoder, but as I explained in the other mail, there is no reason not
to use it and I can't see any complexity in retrieving the data beyond
calling insn_get_length(insn);
On 09/11/2014 04:37 PM, Thomas Gleixner wrote:
Specifically because marshaling the data in and out of the generic
decoder was more complex than a special-purpose decoder.
I did not look at that detail and I trust your judgement here, but
that is in no way explained in the changelog.
This
On Thu, 11 Sep 2014, H. Peter Anvin wrote:
> On 09/11/2014 03:32 PM, Dave Hansen wrote:
> > On 09/11/2014 03:18 PM, Thomas Gleixner wrote:
> >> On Thu, 11 Sep 2014, Qiaowei Ren wrote:
> >>> This patch sets bound violation fields of siginfo struct in #BR
> >>> exception handler by decoding the
On 09/11/2014 03:32 PM, Dave Hansen wrote:
> On 09/11/2014 03:18 PM, Thomas Gleixner wrote:
>> On Thu, 11 Sep 2014, Qiaowei Ren wrote:
>>> This patch sets bound violation fields of siginfo struct in #BR
>>> exception handler by decoding the user instruction and constructing
>>> the faulting
On 09/11/2014 03:18 PM, Thomas Gleixner wrote:
> On Thu, 11 Sep 2014, Qiaowei Ren wrote:
>> This patch sets bound violation fields of siginfo struct in #BR
>> exception handler by decoding the user instruction and constructing
>> the faulting pointer.
>>
>> This patch does't use the generic
On Thu, 11 Sep 2014, Qiaowei Ren wrote:
> This patch sets bound violation fields of siginfo struct in #BR
> exception handler by decoding the user instruction and constructing
> the faulting pointer.
>
> This patch does't use the generic decoder, and implements a limited
> special-purpose
This patch sets bound violation fields of siginfo struct in #BR
exception handler by decoding the user instruction and constructing
the faulting pointer.
This patch does't use the generic decoder, and implements a limited
special-purpose decoder to decode MPX instructions, simply because the
On Thu, 11 Sep 2014, Qiaowei Ren wrote:
This patch sets bound violation fields of siginfo struct in #BR
exception handler by decoding the user instruction and constructing
the faulting pointer.
This patch does't use the generic decoder, and implements a limited
special-purpose decoder to
On 09/11/2014 03:18 PM, Thomas Gleixner wrote:
On Thu, 11 Sep 2014, Qiaowei Ren wrote:
This patch sets bound violation fields of siginfo struct in #BR
exception handler by decoding the user instruction and constructing
the faulting pointer.
This patch does't use the generic decoder, and
On 09/11/2014 03:32 PM, Dave Hansen wrote:
On 09/11/2014 03:18 PM, Thomas Gleixner wrote:
On Thu, 11 Sep 2014, Qiaowei Ren wrote:
This patch sets bound violation fields of siginfo struct in #BR
exception handler by decoding the user instruction and constructing
the faulting pointer.
This
On Thu, 11 Sep 2014, H. Peter Anvin wrote:
On 09/11/2014 03:32 PM, Dave Hansen wrote:
On 09/11/2014 03:18 PM, Thomas Gleixner wrote:
On Thu, 11 Sep 2014, Qiaowei Ren wrote:
This patch sets bound violation fields of siginfo struct in #BR
exception handler by decoding the user instruction
On 09/11/2014 04:37 PM, Thomas Gleixner wrote:
Specifically because marshaling the data in and out of the generic
decoder was more complex than a special-purpose decoder.
I did not look at that detail and I trust your judgement here, but
that is in no way explained in the changelog.
This
This patch sets bound violation fields of siginfo struct in #BR
exception handler by decoding the user instruction and constructing
the faulting pointer.
This patch does't use the generic decoder, and implements a limited
special-purpose decoder to decode MPX instructions, simply because the
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