Extracting vendor blobs from edk2-coreboot payload

Extracting vendor blobs from edk2-coreboot payload

[Anatol Pomozov]

Hello

I am trying to modify/rebuild a Coreboot+EDK2 rom for my hardware. To
do that I need Intel vendor blobs that I cannot find in web
unfortunately. Intel seems does not share the blobs publicly.

Here is the build script used to build my UEFI payload
https://github.com/MattDevo/edk2/blob/master/build-cpp-hswbdw-box.sh
it needs vbt.bin and IntelGopDriver.efi for Haswell.

So I would like to get my device rom image and extract all the blobs.
BaseTools located at the sourcetree seems focusing around building the
image. But I do not see anything related to splitting the result.
googling does not give a clear answer neither.

Is there a simple tool that allows to extract these Intel blobs from
Build/CorebootPayloadPkgX64/RELEASE_GCC5/FV/UEFIPAYLOAD.fd ?

Re: Extracting vendor blobs from edk2-coreboot payload

[Blibbet]

On 05/15/2018 03:36 PM, Anatol Pomozov wrote:
> [...] Is there a simple tool that allows to extract these Intel blobs from
> Build/CorebootPayloadPkgX64/RELEASE_GCC5/FV/UEFIPAYLOAD.fd ?

I expect most Tianocore tools focus on creating blobs, not reversing
them. If EDK2 has tools like this, I'd also like to learn about them. :-)

Have you tried UEFITool's UEFIExtract? If that doesn't work out, perhaps
CHIPSEC or UEFI Firmware Parser, all 3 of those tools have libraries to
parse UEFI blobs. Some phases of UEFIReverse might also help. The
freeware-based non-open source UEFI BIOS Updater (UBU) tool may also help.

https://github.com/LongSoft/UEFITool
https://github.com/jethrogb/uefireverse
https://github.com/theopolis/uefi-firmware-parser
https://github.com/chipsec/chipsec

HTH,
Lee Fisher

Re: Extracting vendor blobs from edk2-coreboot payload

[Andrew Fish]

There is a POSIX command line FV dumper tool in edk2 call VolInfo
https://github.com/tianocore/edk2/blob/master/BaseTools/Source/C/VolInfo/VolInfo.c

Thanks,

Andrew Fish

> On May 17, 2018, at 12:30 PM, Blibbet <blibbet@gmail.com> wrote:
> 
> On 05/15/2018 03:36 PM, Anatol Pomozov wrote:
>> [...] Is there a simple tool that allows to extract these Intel blobs from
>> Build/CorebootPayloadPkgX64/RELEASE_GCC5/FV/UEFIPAYLOAD.fd ?
> 
> I expect most Tianocore tools focus on creating blobs, not reversing
> them. If EDK2 has tools like this, I'd also like to learn about them. :-)
> 
> Have you tried UEFITool's UEFIExtract? If that doesn't work out, perhaps
> CHIPSEC or UEFI Firmware Parser, all 3 of those tools have libraries to
> parse UEFI blobs. Some phases of UEFIReverse might also help. The
> freeware-based non-open source UEFI BIOS Updater (UBU) tool may also help.
> 
> https://github.com/LongSoft/UEFITool
> https://github.com/jethrogb/uefireverse
> https://github.com/theopolis/uefi-firmware-parser
> https://github.com/chipsec/chipsec
> 
> HTH,
> Lee Fisher
> 
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