powerpc64: Set up thread register for _dl_relocate_static_pie

libgcc ifunc resolvers that access hwcap via a field in the tcb can't
be called until the thread pointer is set up.  Other ifunc resolvers
might need access to at_platform.  This patch sets up a fake thread
pointer early to a copy of tcbhead_t.  hwcapinfo.c already had local
variables for hwcap and at_platform, replace them with an entire
tcbhead_t.  It's not that large and this way we easily ensure hwcap
and at_platform are at the same relative offsets as they are in the
real thread block.

The patch also conditionally disables part of tst-tlsifunc-static,
"bar address read from IFUNC resolver is incorrect".  We can't get a
proper address for a thread variable before glibc initialises tls.

Reviewed-by: Tulio Magno Quites Machado Filho <tuliom@linux.ibm.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/sysdeps/powerpc/tst-tlsifunc.c b/sysdeps/powerpc/tst-tlsifunc.c
index 92313e68f4..6b256c6229 100644
--- a/sysdeps/powerpc/tst-tlsifunc.c
+++ b/sysdeps/powerpc/tst-tlsifunc.c
@@ -101,11 +101,14 @@ do_test (void)
 
   if (&bar == bar_ptr)
     printf ("PASS: bar address read from IFUNC resolver is correct.\n");
+#if !defined TST_TLSIFUNC_STATIC || !defined PIC \
+    || !defined PI_STATIC_AND_HIDDEN
   else
     {
       printf ("FAIL: bar address read from IFUNC resolver is incorrect.\n");
       ret = 1;
     }
+#endif
 
   if (tcb_test ())
     printf ("PASS: tcb_test IFUNC resolver called once.\n");