Re: FDF Spec question?

["Gao, Liming" <liming.gao@intel.com>]

Andrew:
  You mean newform.bin has section header. It is just a leaf section. You expect to directly add it into GUIDED section without specify section header again. Right?

Thanks
Liming
-----Original Message-----
From: edk2-devel [mailto:edk2-devel-bounces@lists.01.org] On Behalf Of Andrew Fish
Sent: Thursday, December 22, 2016 1:29 AM
To: Gao, Liming <liming.gao@intel.com>
Cc: edk2-devel <edk2-devel@lists.01.org>
Subject: Re: [edk2] FDF Spec question?


> On Dec 21, 2016, at 6:27 AM, Gao, Liming <liming.gao@intel.com> wrote:
> 
> Andrew:
>  Encapsulation section data is the section stream, not raw format. Then, Leaf section can be extracted from encapsulation section.
> 

Liming,

I happen to have the section stream in binary form checked into the source tree. The section extraction code actually dynamically creates the section header(s) for the stream and this means the section header in the FV is not really used (the section extraction code actually just skips over it). 

Technically speaking only the post processed GUID'ed section needs to produce the leaf. My case is kind of like I compressed the data without the section header. The section header is redundant data from the section extraction codes point of view as the binary format already has that info. 

Thanks,

Andrew Fish

> Thanks
> Liming
> -----Original Message-----
> From: edk2-devel [mailto:edk2-devel-bounces@lists.01.org] On Behalf Of Andrew Fish
> Sent: Wednesday, December 21, 2016 8:27 AM
> To: edk2-devel <edk2-devel@lists.01.org>
> Subject: [edk2] FDF Spec question?
> 
> Is it possible in the FDF syntax to make the payload of a EFI_SECTION_GUID_DEFINED (Encapsulating section) a raw binary file?
> 
> I can make the contents of the GUID'ed encapsulation section a section. But when I'm processing the GUID'ed section I just end up skipping over the extra 4 byte section header so it is unused space. 
> 
>  SECTION GUIDED 4C2B8C75-C6F6-11E6-B483-B8E8562CBAFA  PROCESSING_REQUIRED = TRUE {
>    SECTION RAW = $(WORKSPACE)/MyPackage/MyNewType/Binary/newform.bin
>  }
> 
> There is a syntax to make a leaf section a binary file. 
> 
>  SECTION SUBTYPE_GUID AFC13561-9A65-4754-9C93-E133B3B8767C = $(WORKSPACE)/MyPackage/MyNewType/Binary/newform.bin
> 
> 
> Thanks,
> 
> Andrew Fish
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