linux-kernel - Re: [PATCH v12 26/39] arm64/ptrace: Expose GCS via ptrace and core files

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Message-ID: <Ztc7fIneIhCEmesI@arm.com>
Date: Tue, 3 Sep 2024 17:38:20 +0100
From: Catalin Marinas <catalin.marinas@....com>
To: Mark Brown <broonie@...nel.org>
Cc: Will Deacon <will@...nel.org>, Jonathan Corbet <corbet@....net>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Marc Zyngier <maz@...nel.org>,
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Subject: Re: [PATCH v12 26/39] arm64/ptrace: Expose GCS via ptrace and core
 files

On Mon, Sep 02, 2024 at 07:58:28PM +0100, Mark Brown wrote:
> On Mon, Sep 02, 2024 at 07:56:32PM +0100, Catalin Marinas wrote:
> > On Thu, Aug 29, 2024 at 12:27:42AM +0100, Mark Brown wrote:
> 
> > > +static int gcs_get(struct task_struct *target,
> > > +		   const struct user_regset *regset,
> > > +		   struct membuf to)
> 
> > > +	if (target == current)
> > > +		gcs_preserve_current_state();
> 
> > What's the use-case where target == current and do we need something
> > similar for gcs_set()?
> 
> IIRC core file generation so no.

Ah, true. Makes sense.

-- 
Catalin