[Trustedgrub-users] Stage 1.5 gone?

[<joe...@gm...>]

Hi!

Great new release, with ext3 support!

I remember that stage 1.5 used to be usable with Trusted Grub.

Now in the README I find this:

...
rm /boot/grub/*1_5
...
NOTE: Please make sure, that no *1_5-files are in your /boot/grub-directory. The only valid
files in there are stage1, stage2, default, menu.lst / grub.conf. 
...

Why is that? I could not find any announcement or note about this, but from the source code it look's like it has been specially disabled:

In start.S:

#ifdef STAGE1_5
	ljmp	$0, $0x2200
#else /* ! STAGE1_5 */

	
	/* Begin TCG extension */
	/* Hashes the rest of stage2 and writes the result into PCR9.
	   For details see README file. */
	 


So it looks to me that the different stage1.5 are compiled, but there are warnings about using them. But IF they worked, they would break the asserted boot because stage1.5 would specifically not measure stage2 (it is commented out).

It would be great to know the reason for this change or what problems existed with stage 1.5 that lead to these warnings in the README!

Thanks
 Jörn


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