Thread (7 messages) 7 messages, 5 authors, 2017-01-24

Re: [Ksummit-discuss] security-related TODO items?

From: Greg Ungerer <hidden>
Date: 2017-01-23 23:26:03

On 24/01/17 06:36, David Howells wrote:
Andy Lutomirski [off-list ref] wrote:
[snip]
quoted
quoted
 (6) NOMMU could be particularly tricky.  For ELF-FDPIC at least, the stack
     size is set in the binary.  OTOH, you wouldn't have to relocate the
     pre-loader - you'd just mmap it MAP_PRIVATE and execute in place.
For nommu, forget about it.
Why?  If you do that, you have to have bimodal binfmts.  Note that the
ELF-FDPIC binfmt, at least, can be used for both MMU and NOMMU environments.
This may also be true of FLAT.
It is true for FLAT as well, they can run on both MMU an noMMU.

Regards
Greg


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