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Re: RFC: WMI Enhancements

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On Tuesday 09 May 2017 21:04:15 Andy Shevchenko wrote:
> On Tue, May 9, 2017 at 9:10 PM,  <Mario.Limonciello@dell.com> wrote:
> >> > > Then took relevant decompression code and it really
> >> > > decompressed that binary MOF WMI buffer. But still
> >> > > decompressed format is binary, but I now see all WMI GUID
> >> > > encoded in UTF-16. Decompressed BMF file has again "FOMB"
> >> > > magic header.
> >> > 
> >> > Well that's great.  Is it possible that this compression is used
> >> > for every time a class was declared?
> >> 
> >> Looks like not. That decompressed output seems to be not
> >> compressed anymore. Just use same magic header.
> > 
> > Actually it looks like a new magic header to me after decompressed.
> > 
> > 46 4f 4d 42 54 15 00 00  01 00 00 00 01 00 00 00
> > That's now FOMBT
> 
> I think you just mistakenly take 0x54 as letter when it looks more
> like
> 
> 0x00001554
> 0x00000001
> 0x00000001
> 
> from the above dump.

I looked at more decompressed BMF dumps from ACPI WMI and they have 
different 5th and 6th bytes. So they are really not FOMBT.

46 4f 4d 42 26 35 00 00 01 00 00 00 01 00 00 00
46 4f 4d 42 fa 17 00 00 01 00 00 00 01 00 00 00
46 4f 4d 42 8e 11 00 00 01 00 00 00 01 00 00 00
46 4f 4d 42 ac 1b 00 00 01 00 00 00 01 00 00 00

So magic is only FOMB.

-- 
Pali Rohár
pali.rohar@gmail.com

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RE: RFC: WMI Enhancements <Mario.Limonciello@dell.com> - 2017-05-06 00:00 +0200
  Re: RFC: WMI Enhancements Darren Hart <dvhart@infradead.org> - 2017-05-06 01:50 +0200
    RE: RFC: WMI Enhancements <Mario.Limonciello@dell.com> - 2017-05-06 03:00 +0200
      Re: RFC: WMI Enhancements Andy Lutomirski <luto@kernel.org> - 2017-05-06 03:30 +0200
        Re: RFC: WMI Enhancements Darren Hart <dvhart@infradead.org> - 2017-05-08 17:30 +0200
          RE: RFC: WMI Enhancements <Mario.Limonciello@dell.com> - 2017-05-08 17:40 +0200
            Re: RFC: WMI Enhancements Darren Hart <dvhart@infradead.org> - 2017-05-08 17:50 +0200
              Re: RFC: WMI Enhancements Andy Shevchenko <andy.shevchenko@gmail.com> - 2017-05-08 18:10 +0200
                RE: RFC: WMI Enhancements <Mario.Limonciello@dell.com> - 2017-05-08 21:00 +0200
                Re: RFC: WMI Enhancements Darren Hart <dvhart@infradead.org> - 2017-05-08 21:10 +0200
                RE: RFC: WMI Enhancements <Mario.Limonciello@dell.com> - 2017-05-08 21:20 +0200
              RE: RFC: WMI Enhancements <Mario.Limonciello@dell.com> - 2017-05-08 18:10 +0200
  Re: RFC: WMI Enhancements Pali Rohár <pali.rohar@gmail.com> - 2017-05-08 19:20 +0200
    RE: RFC: WMI Enhancements <Mario.Limonciello@dell.com> - 2017-05-08 21:30 +0200
      Re: RFC: WMI Enhancements Pali Rohár <pali.rohar@gmail.com> - 2017-05-08 23:10 +0200
        RE: RFC: WMI Enhancements <Mario.Limonciello@dell.com> - 2017-05-08 23:20 +0200
          Re: RFC: WMI Enhancements Pali Rohár <pali.rohar@gmail.com> - 2017-05-09 00:20 +0200
            RE: RFC: WMI Enhancements <Mario.Limonciello@dell.com> - 2017-05-09 03:20 +0200
              Re: RFC: WMI Enhancements Pali Rohár <pali.rohar@gmail.com> - 2017-05-09 09:40 +0200
                RE: RFC: WMI Enhancements <Mario.Limonciello@dell.com> - 2017-05-09 20:20 +0200
                Re: RFC: WMI Enhancements Andy Shevchenko <andy.shevchenko@gmail.com> - 2017-05-09 21:10 +0200
                RE: RFC: WMI Enhancements <Mario.Limonciello@dell.com> - 2017-05-09 21:20 +0200
                Re: RFC: WMI Enhancements Andy Shevchenko <andy.shevchenko@gmail.com> - 2017-05-09 21:30 +0200
                Re: RFC: WMI Enhancements Pali Rohár <pali.rohar@gmail.com> - 2017-05-10 00:40 +0200
                Re: RFC: WMI Enhancements Pali Rohár <pali.rohar@gmail.com> - 2017-05-09 21:30 +0200

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