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Re: Grub module to return partuuid of a device such as (hd0, gpt1) at bo


From: Thomas Schmitt
Subject: Re: Grub module to return partuuid of a device such as (hd0, gpt1) at boot time
Date: Sun, 14 Aug 2016 17:44:42 +0200

Hi,

... still trying to make sense of the specs.

Andrei Borzenkov wrote:
> According to UEFI Appendix A it goes into 7-th byte (starting with 0) of
> binary representation of EFI GUID.

Do you mean that one has to interpret the statement of UEFI 2.4

  "All EFI GUIDs (Globally Unique Identifiers) have the format described
   in RFC 4122 [...]
   It should also be noted that TimeLow, TimeMid, TimeHighAndVersion fields
   in the EFI are encoded as little endian."

as

  The text format of EFI GUIDs is the same as in RFC 4122, but the binary
  representation is byte-swapped at the first 4, 2, and 2 bytes.

If so, then i have to change the interpretation of the text form with the
new xorriso option.


Have a nice day :)

Thomas




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