[Bug 37355] Multiple software protection schemes need ntoskrnl ' MmMapLockedPagesSpecifyCache' implementation (Tages Protection v5.x, BattleEye's 'bedaisy.sys')

[wine-bugs at winehq.org]

https://bugs.winehq.org/show_bug.cgi?id=37355

--- Comment #26 from Zebediah Figura <z.figura12 at gmail.com> ---
(In reply to Richard Yao from comment #25)
> > The problem is that there is no way to properly implement this on Linux
> > since there is no way to simply map the memory of a different process if you
> > are not inside the kernel. Since wine is no kernel module it can only use
> > memory of different processes, when they explicitly create it as shared
> > memory block. Sadly you can not declare a memory block as shared after it
> > was allocated, so this does not help implementing this command.
> 
> It occurred to me that there is a simpler way of doing this on Linux. You
> just open /proc/$PID/mem, do lseek to the region that you want (after doing
> page alignment) and then call mmap (also after doing page alignment). The
> downside is that this requires root privileges, but on the bright side, you
> don't need to write a kernel module.

I think needing root privileges probably rules this approach out. Is there
anything preventing the aforementioned approach using APCs from working?

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