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Re: gnumach RPC: get info about the calling task

From: Joan Lledó
Subject: Re: gnumach RPC: get info about the calling task
Date: Sat, 16 Oct 2021 20:27:55 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.14.0

OK, I'll try with your design

El 16/10/21 a les 18:06, Sergey Bugaev ha escrit:
On Sat, Oct 16, 2021 at 6:54 PM Samuel Thibault <samuel.thibault@gnu.org> wrote:
Indeed, since it's the region that remembers which protection was
allowed, we need a proxy there to enforce them.

Right, that's also a good point. max_proection can be less than 7 even
if there never was a proxy. That is, one can do

vm_map (some_other_task, memobj, VM_PROT_READ, VM_PROT_READ);

and expect some_other_task to never get write access to the object.


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