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Re: [PATCH] Don't use PLT nor GOT in libc.a [BZ #20750]
- From: "H.J. Lu" <hjl dot tools at gmail dot com>
- To: Florian Weimer <fweimer at redhat dot com>
- Cc: GNU C Library <libc-alpha at sourceware dot org>
- Date: Fri, 4 Nov 2016 12:25:12 -0700
- Subject: Re: [PATCH] Don't use PLT nor GOT in libc.a [BZ #20750]
- Authentication-results: sourceware.org; auth=none
- References: <20161104174739.GA5880@intel.com> <f3a3acd2-044a-c4bf-11e4-ecee4caf5324@redhat.com>
On Fri, Nov 4, 2016 at 12:03 PM, Florian Weimer <fweimer@redhat.com> wrote:
> On 11/04/2016 06:47 PM, H.J. Lu wrote:
>>
>> There is no need to use PLT nor GOT in libc.a to branch to a function,
>> regardless whether libc.a is compiled with PIC or not.
>>
>> Tested on x86-64. OK for master?
>
>
> Isn't this header file used outside of libc as well?
It is used for other .a files. If they aren't used to create static binaries,
PLT/GOT may be used. The resulting executable will work correctly.
> (And the commit message should mention that this change is specific to
> x86_64.)
>
I will update it.
--
H.J.