[intel smap, kpatch] weekly report #8

[Oliver Pinter]

Hi!

This week I mostly implemented the kernel patching framework. It's
required to optimize a little, but mostly done. The current status can
you find both in svn or git repo.

The current code boot tested with kernel image patching, it's works.
Next should I test kld preload patching and kldload patching, and then
adopting SMAP related instructions and xsave related codes.

Detailed info are in wiki.

On 7/11/14, Oliver Pinter <oliver.pntr at gmail.com> wrote:
> 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
>>>>>>
>>>>>
>>>>
>>>
>>
>