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From: Leif Lindholm <leif.lindholm@linaro.org>
To: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: edk2-devel-01 <edk2-devel@lists.01.org>,
	"Gao, Liming" <liming.gao@intel.com>
Subject: Re: [PATCH] MdePkg/BaseLib AARCH64: terminate stack frame list on stack switch
Date: Fri, 9 Sep 2016 13:10:19 +0100	[thread overview]
Message-ID: <20160909121019.GO16080@bivouac.eciton.net> (raw)
In-Reply-To: <CAKv+Gu_xJk=8hrpP405+Q3iR5Rjj34xjhCmzS2ENt6jJSOosSQ@mail.gmail.com>

On Fri, Sep 09, 2016 at 01:03:59PM +0100, Ard Biesheuvel wrote:
> On 9 September 2016 at 12:18, Leif Lindholm <leif.lindholm@linaro.org> wrote:
> > On Fri, Sep 09, 2016 at 08:21:26AM +0100, Ard Biesheuvel wrote:
> >> When switching to the DXE phase stack, set the frame pointer to zero so
> >> that code walking the stack frame will not try to access stack frames\
> >
> > Trailing '\'.
> >
> >> belonging to the old stack.
> >
> > Do you mean that code will check for zero and stop processing, or that
> > it will be accessing rubbish instead of parsing a valid-looking frame?
> 
> I don't understand this question. If it is zero, it will stop
> processing. If it is not zero, it will proceed, and potentially
> traverse stack frames in memory that is now owned by someone else.

Which was exactly what I was asking :)
So no need to change (but drop the '\').

/
    Leif


      reply	other threads:[~2016-09-09 12:10 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-09-09  7:21 [PATCH] MdePkg/BaseLib AARCH64: terminate stack frame list on stack switch Ard Biesheuvel
2016-09-09 11:18 ` Leif Lindholm
2016-09-09 12:03   ` Ard Biesheuvel
2016-09-09 12:10     ` Leif Lindholm [this message]

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