flat assembler
Message board for the users of flat assembler.

Index > OS Construction > Windows 8's locked bootloaders: much ado about nothing

Author
Thread Post new topic Reply to topic
Mike Gonta



Joined: 26 Dec 2010
Posts: 240
Location: the-ideom
Mike Gonta
http://alturl.com/aag9i

x86 Windows 8 systems must also allow secure boot to be
turned off completely, so that no certificate verification
is performed at all.
UEFI allows the ability to drop back to mimicking BIOS,
to allow UEFI systems to start pre-UEFI operating systems.
This is done through a combination of running the "option ROMs"
embedded into many components, and Compatibility Support Modules
(CSMs) to hand over control to a legacy operating system.
Windows 8 machines using x86 processors can offer this kind
of backwards compatibility, but they must not invoke it without
explicit user action; in other words, this "BIOS mode" must
be explicitly enabled.

_________________
Mike Gonta
the-ideom - now you know how to compile

https://mikegonta.com
Post 10 Nov 2012, 20:48
View user's profile Send private message Visit poster's website Reply with quote
revolution
When all else fails, read the source


Joined: 24 Aug 2004
Posts: 17667
Location: In your JS exploiting you and your system
revolution
Post 11 Nov 2012, 00:42
View user's profile Send private message Visit poster's website Reply with quote
revolution
When all else fails, read the source


Joined: 24 Aug 2004
Posts: 17667
Location: In your JS exploiting you and your system
revolution
Mike Gonta wrote:
much ado about nothing
Only for x86 systems. For other systems (like ARM) it is the opposite where MS have mandated that the user cannot turn off secure boot.
Post 11 Nov 2012, 00:44
View user's profile Send private message Visit poster's website Reply with quote
Display posts from previous:
Post new topic Reply to topic

Jump to:  


< Last Thread | Next Thread >
Forum Rules:
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum


Copyright © 1999-2020, Tomasz Grysztar. Also on GitHub, YouTube, Twitter.

Website powered by rwasa.