linux-kernel - Re: Pondering per-process vsyscall disablement

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Message-ID: <5388E499.6080101@zytor.com>
Date:	Fri, 30 May 2014 13:05:45 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Andy Lutomirski <luto@...capital.net>
CC:	Marian Marinov <mm@...com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	X86 ML <x86@...nel.org>, Linux API <linux-api@...r.kernel.org>
Subject: Re: Pondering per-process vsyscall disablement

On 05/30/2014 01:00 PM, Andy Lutomirski wrote:
> 
> Do the flags go in the ELF loader or in the executable we're running?
> Or both (and, if both, do we and them or or them)?
> 
> I think the interpreter makes a little more sense in general: for the
> most part, use of vsyscalls is a property of the runtime environment,
> not of the program being run.  But maybe this is naive.
> 

They go into each object which becomes part of the running program, i.e.
executable, dynamic libraries, and dynamic linker.

	-hpa


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