linux-kernel - Re: [PATCH v7 11/12] x86/paravirt: Adapt assembly for PIE support

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Date:   Mon, 27 May 2019 07:47:10 +0200
From:   Juergen Gross <jgross@...e.com>
To:     Thomas Garnier <thgarnie@...omium.org>,
        kernel-hardening@...ts.openwall.com
Cc:     kristen@...ux.intel.com, Thomas Garnier <thgarnie@...gle.com>,
        Alok Kataria <akataria@...are.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        "H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
        virtualization@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v7 11/12] x86/paravirt: Adapt assembly for PIE support

On 21/05/2019 01:19, Thomas Garnier wrote:
> From: Thomas Garnier <thgarnie@...gle.com>
> 
> if PIE is enabled, switch the paravirt assembly constraints to be
> compatible. The %c/i constrains generate smaller code so is kept by
> default.
> 
> Position Independent Executable (PIE) support will allow to extend the
> KASLR randomization range below 0xffffffff80000000.
> 
> Signed-off-by: Thomas Garnier <thgarnie@...gle.com>

Acked-by: Juergen Gross <jgross@...e.com>


Juergen