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From: Alexander Monakov <amonakov@ispras.ru>
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Subject: Re: Memory management, how to protect some address space.
Date: Thu, 10 Mar 2016 23:25:12 +0300 (MSK)
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On Thu, 10 Mar 2016, Rich Felker wrote:
> exec does not make a new process; it replaces the program running in
> the current process with a new one. There's actually a command line
> too (I forget the name) to run a program with a particular personality
> that calls personality() before execve().

setarch

It has handy shortcuts like linux32 for switching to a 32-bit uname
personality; in this case you'd use setarch --3gb or just setarch -3.

Alexander