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Date:      Wed, 27 Jul 2016 17:11:12 -0700
From:      Conrad Meyer <cem@freebsd.org>
To:        Shawn Webb <shawn.webb@hardenedbsd.org>
Cc:        freebsd-current <freebsd-current@freebsd.org>, Ed Maste <emaste@freebsd.org>
Subject:   Re: SafeStack in base
Message-ID:  <CAG6CVpXxWk1MvAkjygrPaE7pDbiKwvJ12o0U1o_Qyy2GrYC_ug@mail.gmail.com>
In-Reply-To: <20160728000530.GH13428@mutt-hardenedbsd>
References:  <20160727225527.GG13428@mutt-hardenedbsd> <CAG6CVpWgXMNHsdo0doL0FDygykZY3vYm9w8897p4nyetTmGfew@mail.gmail.com> <20160728000530.GH13428@mutt-hardenedbsd>

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On Wed, Jul 27, 2016 at 5:05 PM, Shawn Webb <shawn.webb@hardenedbsd.org> wrote:
> On Wed, Jul 27, 2016 at 05:02:07PM -0700, Conrad Meyer wrote:
>> The problem appears to be an upstream limitation of
>> -fsanitize=safe-stack: "Most programs, static libraries, or individual
>> files can be compiled with SafeStack as is. ??? Linking a DSO with
>> SafeStack is not currently supported." [0]
>>
>> That probably needs to be addressed upstream before it can be enabled globally.
>
> Gotcha. If I'm reading correctly, then, SafeStack can only be enabled in
> bsd.prog.mk (and _not_ bsd.lib.mk). Is that correct?

That is my reading of the page.  I'll admit my total experience with
-fsanitize=safe-stack is limited to glancing at the web page 5 minutes
ago, so don't consider my take authoritative.

Best,
Conrad



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