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Re: [PATCH] Expand PIC calls without PLT with -fno-plt


On Mon, May 04, 2015 at 11:34:05AM -0600, Jeff Law wrote:
> On 05/04/2015 10:37 AM, Alexander Monakov wrote:
> >This patch introduces option -fno-plt that allows to expand calls that would
> >go via PLT to load the address of the function immediately at call site (which
> >introduces a GOT load).  Cover letter explains the motivation for this patch.
> >
> >New option documentation for invoke.texi is missing from the patch; if this is
> >accepted I'll be happy to send a v2 with documentation added.
> >
> >	* calls.c (prepare_call_address): Transform PLT call to GOT lookup and
> >	indirect call by forcing address into a pseudo with -fno-plt.
> >	* common.opt (flag_plt): New option.
> OK once you cobble together the invoke.texi changes.

Isn't what Michael/Alan suggested better?  I mean as/ld/compiler changes to
inline the plt slot's first part, then lazy binding will work fine.

	Jakub


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