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Re: [PATCH] Add private_function for private functions within glibc [BZ #21598]
On Thu, Aug 10, 2017 at 5:49 AM, Florian Weimer <firstname.lastname@example.org> wrote:
> On 08/10/2017 02:44 PM, H.J. Lu wrote:
>> It is OK to use __attribute__ ((regparm (3))) with CET as long as the
>> function is hidden. We need to at least keep __attribute__ ((regparm (1)))
>> on ___tls_get_addr since it is the part of TLS ABI and we may have to
>> support __attribute__ ((regparm (3))) for lazy binding when CET is disabled
>> forever. Remove it from glibc doesn't buy us much.
> It buys us peace of mind for those of us who do not work on i386 because
> internal_function mismatches are a constant source of i386 build
> failures. I want to get rid of it because I think its presence is a
> poor trade-off for the project as a whole.
That is fine with me then.
FWIW, last time when I tried it, I gave up after many segfaults :-(.
The list of places I remembered:
3. TLS lookup functions.
There may be more.