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On 11/04/2016 08:25 PM, H.J. Lu wrote:
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.
You mean because “name” is automatically mapped to “name@plt”? I find this comment not very illuminating: +/* For libc.a, we want to branch to target directly. */ # define JUMPTARGET(name) nameAnd cheating the static linker in this way seems like a future maintenance hazard.
Thanks, Florian
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