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<a class="moz-txt-link-abbreviated" href="mailto:btc@openinworld.com">btc@openinworld.com</a> wrote:
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I have been wondering for a while about the implications with Nativeboost for a
misbehaving C-library to corrupt the Smalltalk image. Just now I came across
<a class="moz-txt-link-freetext" href="http://stackoverflow.com/questions/9056427/kernel-mode-and-memory-protection">http://stackoverflow.com/questions/9056427/kernel-mode-and-memory-protection</a>,
where I read:
"Each process has its own page table, and each page in the page table can be
restricted by setting a maximum CPL (Current Privilege Level). Changing your
CPL is a relatively fast operation"
I don't know much about this but I am curious... Could the VM be made to
normally run at CPL 2 and when allocating calling out to foreign function switch
to CPL 3 - without too much overhead?
cheers -ben
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<a class="moz-txt-link-freetext" href="http://pdos.csail.mit.edu/6.828/2005/readings/i386/s06_03.htm">http://pdos.csail.mit.edu/6.828/2005/readings/i386/s06_03.htm</a>.<br>
also provides some interesting options. Note this is all new to me and
at the moment just for mild curiosity, so if its too much of a
distraction just let me know.<br>
<br>
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