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* Re: [gentoo-dev] Re: [PATCH] To enable ssp default in Gcc the toolchain.eclass need some changes.
  @ 2014-01-10  6:39 99%             ` Rick "Zero_Chaos" Farina
  0 siblings, 0 replies; 1+ results
From: Rick "Zero_Chaos" Farina @ 2014-01-10  6:39 UTC (permalink / raw
  To: gentoo-dev

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On 01/09/2014 07:17 PM, Ryan Hill wrote:
> On Thu, 9 Jan 2014 17:30:46 -0600 Ryan Hill <dirtyepic@gentoo.org>
> wrote:
> 
>> On Thu, 09 Jan 2014 17:29:26 -0500 "Rick \"Zero_Chaos\" Farina"
>> <zerochaos@gentoo.org> wrote:
>> 
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>>> 
>>> On 01/09/2014 05:21 PM, Michał Górny wrote:
>>>> Dnia 2014-01-09, o godz. 17:06:52 "Anthony G. Basile"
>>>> <blueness@gentoo.org> napisał(a):
>>>> 
>>>>> On 01/09/2014 04:57 PM, Pacho Ramos wrote:
>>>>>> What are the advantages of disabling SSP to deserve that
>>>>>> "special" handling via USE flag or easily disabling it
>>>>>> appending the flag?
>>>>> 
>>>>> There are some cases where ssp could break things.  I know
>>>>> of once case right now, but its somewhat exotic.  Also,
>>>>> sometimes we *want* to break things for testing.  I'm
>>>>> thinking here of instance where we want to test a pax
>>>>> hardened kernel to see if it catches abuses of memory which
>>>>> would otherwise be caught by executables emitted from a
>>>>> hardened toolchain. Take a look at the app-admin/paxtest
>>>>> suite.
>>>> 
>>>> Just to be clear, are we talking about potential system-wide
>>>> breakage or single, specific packages being broken by SSP? In
>>>> other words, are there cases when people will really want to
>>>> disable SSP completely?
>>>> 
>>>> Unless I'm misunderstanding something, your examples sound
>>>> like you just want -fno-stack-protector per-package. I don't
>>>> really think you actually want to rebuild whole gcc just to
>>>> do some testing on a single package...
>>>> 
>>> Or just as easily set -fno-stack-protector in CFLAGS in
>>> make.conf.
>>> 
>>> I never felt manipulating cflags with use flags was a great
>>> idea, but in this case is does feel extra pointless.
>>> 
>>> Personally I don't feel this is needed, and the added benefit
>>> of clearing up a bogus "noblah" use flag makes me smile.
>>> 
>>> Zorry, do we really need this flag?
>> 
>> Yes, we do.  I want a way to disable it at a toolchain level.
> 
> Let me clarify.  I would like to be able to disable it without
> relying on CFLAGS or anything the user could fiddle with.  I need a
> big red off switch, at least for now.
> 
> 
I think if you clarify this last statement a lot of the arguments will
vanish.  I believe most of us are happy to hear your thoughts in a
little more detail, and will be swayed by them.

- -Zero
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2014-01-09 20:58     [gentoo-dev] [PATCH] To enable ssp default in Gcc the toolchain.eclass need some changes Magnus Granberg
2014-01-09 21:57     ` Pacho Ramos
2014-01-09 22:06       ` Anthony G. Basile
2014-01-09 22:21         ` Michał Górny
2014-01-09 22:29           ` Rick "Zero_Chaos" Farina
2014-01-09 23:30             ` [gentoo-dev] " Ryan Hill
2014-01-10  0:17               ` Ryan Hill
2014-01-10  6:39 99%             ` Rick "Zero_Chaos" Farina

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