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A comment on OpenBSD's kernel gets W^X treatment.

Re:OpenBSD's kernel gets W^X treatment by nbe on Wednesday January 14, 2015 @05:20AM (#8885396)
Does anyone know what 'MI' and 'MD layer' refer to in Theo's message ? Machine Indepedent and Machine Dependent maybe ?
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Re:OpenBSD's kernel gets W^X treatment by VLM on Wednesday January 14, 2015 @07:36AM (#8885810)
Exactly yes. A *BSD thing not strictly just openbsd or whatever.

Perhaps it would help to see them "in action" here is a link to the linux emulation layer in freebsd, the MD chapter four specifically describes i386 (this is how you put syscall parameters on, and off, the stack on a i386) and the MI chapter five is a pile of structs that would be used by any emulation layer (NPTL, TLS, the joy of futex'es's (a linux thing that is kind of a mutex cache for speed, sorta kinda), and good luck with the ioctls).

https://www.freebsd.org/doc/en/articles/linux-emulation/inde...

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Re:OpenBSD's kernel gets W^X treatment by nbe on Wednesday January 14, 2015 @10:48AM (#8886947)
Very interesting link, thanks.
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