Fix powerpc64le ld segfaults when --emit-relocs is used

[Alan Modra]

ELFv2 needs fewer relocs to annotate plt call stubs.  I correctly
allocated a smaller buffer and wrote the proper relocs, but stupidly
bumped the reloc count as for ELFv1.  That resulted in a buffer
overrun and trashing of other ld state.

Committed mainline and 2.24.

	* elf64-ppc.c (ppc_build_one_stub): Correct reloc count passed
	to get_relocs for ELFv2.

diff --git a/bfd/elf64-ppc.c b/bfd/elf64-ppc.c
index bb3326d..c97a39e 100644
--- a/bfd/elf64-ppc.c
+++ b/bfd/elf64-ppc.c
@@ -10750,10 +10750,11 @@ ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
       if (info->emitrelocations)
 	{
 	  r = get_relocs (stub_entry->stub_sec,
-			  (2
-			   + (PPC_HA (off) != 0)
-			   + (htab->plt_static_chain
-			      && PPC_HA (off + 16) == PPC_HA (off))));
+			  ((PPC_HA (off) != 0)
+			   + (htab->opd_abi
+			      ? 2 + (htab->plt_static_chain
+				     && PPC_HA (off + 16) == PPC_HA (off))
+			      : 1)));
 	  if (r == NULL)
 	    return FALSE;
 	  r[0].r_offset = loc - stub_entry->stub_sec->contents;

-- 
Alan Modra
Australia Development Lab, IBM