Re: [lm-sensors] Dell Latitude E6440 & i8k

Re: [lm-sensors] Dell Latitude E6440 & i8k

[Jean Delvare]

Please leave the list in Cc.

On Sun, 18 May 2014 00:52:13 +0200, Pali Rohár wrote:
> Do you know if there is any way to extract BIOS SMM code? Or it 
> is something which is not possible to do from OS/kernel side?

If you download a BIOS update for your laptop from Dell, the SMM code
is certainly somewhere in the binary blob which gets flashed to the
EEPROM. But extracting that code from there would certainly be
challenge.

-- 
Jean Delvare
SUSE L3 Support

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Re: [lm-sensors] Dell Latitude E6440 & i8k

[Pali Rohár]

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On Sunday 18 May 2014 10:19:10 Jean Delvare wrote:
> Please leave the list in Cc.
> 

Sorry I forgot, but after that I resent original message to list.

> On Sun, 18 May 2014 00:52:13 +0200, Pali Rohár wrote:
> > Do you know if there is any way to extract BIOS SMM code? Or
> > it is something which is not possible to do from OS/kernel
> > side?
> 
> If you download a BIOS update for your laptop from Dell, the
> SMM code is certainly somewhere in the binary blob which gets
> flashed to the EEPROM. But extracting that code from there
> would certainly be challenge.

Yes extracting it from bios flashing image was only idea which I 
got and I doubt I can do it... (specially when dell bios is 
compressed and image itself contains flashing program...)

What I now found is this table of SMM commands:
https://lkml.org/lkml/2008/12/18/44

So it looks like SMM data are in some NBSVC.MDM binary. Do you 
know something more about it?

-- 
Pali Rohár
pali.rohar@gmail.com

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Re: [lm-sensors] Dell Latitude E6440 & i8k

[Jean Delvare]

On Sun, 18 May 2014 10:36:16 +0200, Pali Rohár wrote:
> On Sunday 18 May 2014 10:19:10 Jean Delvare wrote:
> > If you download a BIOS update for your laptop from Dell, the
> > SMM code is certainly somewhere in the binary blob which gets
> > flashed to the EEPROM. But extracting that code from there
> > would certainly be challenge.
> 
> Yes extracting it from bios flashing image was only idea which I 
> got and I doubt I can do it... (specially when dell bios is 
> compressed and image itself contains flashing program...)
> 
> What I now found is this table of SMM commands:
> https://lkml.org/lkml/2008/12/18/44
> 
> So it looks like SMM data are in some NBSVC.MDM binary. Do you 
> know something more about it?

No, I don't, sorry.

-- 
Jean Delvare
SUSE L3 Support

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