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Re: [PATCH][BZ #21779] Resolve non-relocatable branch in MicroBlaze pt-vfork.S
On Mon, 17 Jul 2017, Adhemerval Zanella wrote:
> On 17/07/2017 09:58, Nathan Rossi wrote:
> > The relative branch directly to __libc_vfork results in an relocation
> > that cannot be resolved. Specifically a R_MICROBLAZE_64_PCREL relocation
> > is created for this branch, however for MicroBlaze R_MICROBLAZE_64_PCREL
> > type relocations symbols are not resolved. Additionally due to the
> > branch being located in the .text section the instruction cannot be
> > rewritten as the section is not writable, and causes a segfault at
> > runtime when loading libpthread.
> >
> > To resolve this issue, ensure the branch is done using PLT. This removes
> > the need to modify the instruction and trades the R_MICROBLAZE_64_PCREL
> > for a more common R_MICROBLAZE_JUMP via the PLT.
> >
> > 2017-07-17 Nathan Rossi <nathan@nathanrossi.com>
> >
> > [BZ #21779]
> > * sysdeps/unix/sysv/linux/microblaze/pt-vfork.S: Branch using PLT
>
> LGTM, cross make clean shows no regression. Since you seem to have access
> to a microblaze ystem, it would be useful if you have time to run the
> complete make check so we can update the 2.26 release wike [1].
It looks like neither this nor the ulps update has been committed?
--
Joseph S. Myers
joseph@codesourcery.com