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    SubjectRe: Really good idea to allow mmap(0, FIXED)?
    > > > Besides that, I currently don't see a valid reason to mmap address 0.
    > > >
    > > > Comments?
    > >
    > > User zero is not neccessarily mapped at kernel zero so your argument
    > > isn't portable either.
    > Eh, so what about the following.
    > We _have_ arches which map user zero to kernel zero. What about
    > specialcasing that on a per-arch case. So remapping user zero to
    > something else in kernel.

    Just add some magic constant on architectures you care about... make
    user 0 start at 4mb in kernel... and you get your security hardened
    kernel w/o breaking dosemu. All you need is to create a patch :-)

    Thanks for all the (sleeping) penguins.
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      Last update: 2006-10-07 13:27    [W:0.020 / U:0.248 seconds]
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