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/  Forum Index
   /  Amiga OS4 Hardware
      /  Spectre and Dr evil for the PPC
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Barana 
Spectre and Dr evil for the PPC
Posted on 9-Jan-2018 22:40:55
#1 ]
Cult Member
Joined: 1-Sep-2003
Posts: 817
From: Straya!

http://tenfourfox.blogspot.com.au/2018/01/more-about-spectre-and-powerpc-or-why.html?m=1
Enjoy

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Chain-Q 
Re: Spectre and Dr evil for the PPC
Posted on 30-Jan-2018 1:21:23
#2 ]
Cult Member
Joined: 31-Jan-2005
Posts: 806
From: Budapest, Hungary

@Barana
Well, on the request of someone, I hacked the PPC version of the PoC exploit to compile for MorphOS, and more or less duplicated the results of the TenFourFox guy.

Here, including screenshots from some hardware:

http://charlie.amigaspirit.hu/temp/private/spectre/

TL;DR: 604e and 603e doesn't seem to be affected, the faster G4s are, including ours in the MorphOS-Macs and even the Pegasos 2/G4 (although the PoC was very unreliable on the Pegasos 2, and sometimes just returned garbage, or only partial strings!). I don't have a G3 or 4xx based system to test with.

Although on a non- or limited memory protected system like Amiga a Spectre-like exploit makes little sense as an attack vector, but nevertheless, there are Linux PPC folks out there, so better know what you're dealing with.

Happy testing. Would be interesting if someone compiled this for OS4, and tested on the X1000 and X50x0 series especially.

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PegasosII/G4 : Efika : A2000/060/PIV : A1200/060 : and more
"Strip the Amiga community of speculation and we can fit every forum on a 720k floppy." (by resle)

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bison 
Re: Spectre and Dr evil for the PPC
Posted on 30-Jan-2018 2:30:31
#3 ]
Super Member
Joined: 18-Dec-2007
Posts: 1142
From: N-Space

@Barana

I don't suppose this matters much to anyone running AmigaOS, since it doesn't have any memory protection to circumvent in the first place. There's no point in closing the windows if the back door is wide open.

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thellier 
Re: Spectre and Dr evil for the PPC
Posted on 30-Jan-2018 8:05:23
#4 ]
Regular Member
Joined: 2-Nov-2009
Posts: 238
From: Paris

@Chain-Q
> if someone compiled this for OS4
http://amigaworld.net/modules/newbb/viewtopic.php?topic_id=42332&forum=17&start=20&viewmode=flat&order=0

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KimmoK 
Re: Spectre and Dr evil for the PPC
Posted on 30-Jan-2018 14:18:31
#5 ]
Elite Member
Joined: 14-Mar-2003
Posts: 5101
From: Ylikiiminki, Finland

@bison

"There's no point in closing the windows if the back door is wide open."

Before having a back door, one might consider building walls first.
(walls help with the window stuff as well)

Amiga environment is like Finnish countryside, no need to lock the door and one can leave car running with keys during shopping, when there is only

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// For freedom, for honor, for AMIGA
//
// Thing that I should find more time for: CC64 - 64bit Community Computer?

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Chain-Q 
Re: Spectre and Dr evil for the PPC
Posted on 30-Jan-2018 15:08:12
#6 ]
Cult Member
Joined: 31-Jan-2005
Posts: 806
From: Budapest, Hungary

@thellier
Oops. Well. As I said, someone asked, and it was faster to just do the port than to look around if someone has done it already. :) Good to know. Also the results are interesting in that thread, thanks!

_________________
PegasosII/G4 : Efika : A2000/060/PIV : A1200/060 : and more
"Strip the Amiga community of speculation and we can fit every forum on a 720k floppy." (by resle)

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