[intel smap, kpatch] weekly report #6 and #7

[Oliver Pinter]

Hi All!

At previous week I started to design a kernel patching framework and I
have a little holiday.

At this week I mostly finished the design, and started to implement
the selfpatching framework.

Next week I plan to finish the implementation of the framework, and
after that migrate the SMAP stuff to use them.

The current status can you found on my wiki site.

On 6/28/14, Oliver Pinter <oliver.pntr at gmail.com> wrote:
> This week I started the second phase of GSoC. In this design a
> run-time kernel and module patching framework. This means that the
> kernel able to dynamically change their code run-time.
>
> In second phase's first week I investigated where must I implement the
> functionality and which kernel APIs should I use.
>
> You can found the current status in my wiki page.
>
> On 6/21/14, Oliver Pinter <oliver.pntr at gmail.com> wrote:
>> Hi!
>>
>> At this week i am hunting a triple fault during the boot. This caused
>> by a compiler error, when CPUTYPE in /etc/make.conf was set to
>> core-avx2, after removing this the first phase was done. All of my
>> test running fine and the system are stable. Originally only amd64
>> implementation required, but I added to i386 too - but the later not
>> yet tested.
>>
>> In next phase I design a proper way how to patch kernel and modules at
>> boot and run-time.
>>
>> What's done:
>> * SMAP for amd64
>> * test SMAP for amd64
>> * build framework
>> * VM creation
>> * SMAP for i386 (not tested)
>> * some other tool, that make my life easier
>>
>> The current status can you find on my wiki page.
>>
>> On 6/15/14, Oliver Pinter <oliver.pntr at gmail.com> wrote:
>>> Hi all!
>>>
>>> In the last week I was mostly done with implementation, as you can see
>>> on my wiki page. The most of i386 commits are not tested because a
>>> cross-build problem on amd64 system.
>>> Other resolvable problem are on amd64 system, where the machine triple
>>> faulted, because wrong assembler statements generated with the
>>> compiler. I'm deep in debugging both of two case. This issue are too
>>> in my wiki page under this section:
>>> https://wiki.freebsd.org/SummerOfCode2014/IntelSMAPandKernelPatching#notes
>>>
>>> I have at this week my last exam at Thursday. After that I'm focusing
>>> fully on GSoC.
>>>
>>> On 6/6/14, Oliver Pinter <oliver.pntr at gmail.com> wrote:
>>>> Hi all!
>>>>
>>>> Previous week I started to work on SMAP for amd64 and i386. For amd64
>>>> many parts are in good state. The codes currently are only compile
>>>> tested, at next week I create a VM, and create run-time tests. For
>>>> i386 started the work on yesterday.
>>>> All of my status can be found on my wiki page.
>>>>
>>>> What's done, but not tested in this week:
>>>> * {amd64,i386} trap handler
>>>> * amd64 initialization
>>>> * {amd64,i386} identification
>>>> * {amd64,i386} exceptions
>>>> * amd64 pmap changes
>>>> * amd64 support.S changes
>>>> * amd64 ia32 compat exceptions
>>>> * i386 ddb extension
>>>>
>>>> At next week I plan to finish all of amd64 things, and most of i386
>>>> things, and begin to test; start to design a proper way to create
>>>> kpatch and/or ifunc like things.
>>>>
>>>>
>>>> svn: http://svnweb.freebsd.org/socsvn/soc2014/op/
>>>> git: https://github.com/opntr/opBSD (branches:
>>>> op/gsoc2014/{master,smap,kpatch} )
>>>> wiki:
>>>> https://wiki.freebsd.org/SummerOfCode2014/IntelSMAPandKernelPatching
>>>>
>>>>
>>>> On 5/29/14, Oliver Pinter <oliver.pntr at gmail.com> wrote:
>>>>> Hi all!
>>>>>
>>>>> I'm working on Intel SMAP technology in first half of GSoC.
>>>>> At first week I investigated in SMAP technology and relevant FreeBSD
>>>>> codes, whats changed since my Bsc thesis.
>>>>>
>>>>> I implemented a vulnerable kernel module and PoC to test allowed and
>>>>> not allowed memory access scenario. Created my wiki page, svn repo,
>>>>> and git repo.
>>>>>
>>>>> svn: http://svnweb.freebsd.org/socsvn/soc2014/op/
>>>>> git: https://github.com/opntr/opBSD (branches:
>>>>> op/gsoc2014/{master,smap,kpatch} )
>>>>> wiki:
>>>>> https://wiki.freebsd.org/SummerOfCode2014/IntelSMAPandKernelPatching
>>>>> test-cases:
>>>>> http://svnweb.freebsd.org/socsvn/soc2014/op/tests/smap-tester/
>>>>>
>>>>> Good days,
>>>>> Oliver
>>>>>
>>>>
>>>
>>
>