main/binutils: backport fix for ppc64le

This fixes clang testsuite.

Patch was taken from upstream binutils-2_30-branch
https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;a=shortlog;h=refs/heads/binutils-2_30-branch

Upstream report:
https://sourceware.org/ml/binutils/2018-03/msg00183.html

1 files changed, 93 insertions, 0 deletions

diff --git a/main/binutils/fix-powerpc64-out-ot-line-save-restore.patch b/main/binutils/fix-powerpc64-out-ot-line-save-restore.patch
new file mode 100644
index 0000000000..56ec7ede40
--- /dev/null
+++ b/main/binutils/fix-powerpc64-out-ot-line-save-restore.patch
@@ -0,0 +1,93 @@
+From d66deb71f1537e2e30dccdfda22eed5d46ec47eb Mon Sep 17 00:00:00 2001
+From: Alan Modra <amodra@gmail.com>
+Date: Wed, 14 Mar 2018 22:09:33 +1030
+Subject: [PATCH] PowerPC64 debian bug 886264, out-of-line save/restore
+ functions
+
+This calculation in relocate_section
+
+	      if (stub_entry->stub_type == ppc_stub_save_res)
+		relocation += (stub_sec->output_offset
+			       + stub_sec->output_section->vma
+			       + stub_sec->size - htab->sfpr->size
+			       - htab->sfpr->output_offset
+			       - htab->sfpr->output_section->vma);
+
+to adjust from the original out-of-line save/restore function address
+in sfpr to a copy at the end of stub_sec goes wrong when stub_sec is
+padded, because the copy is no longer at the end of stub_sec.  The
+solution is to pad before copying sfpr, so the copy is always at the
+end of stub_sec.
+
+	* elf64-ppc.c (sfpr_define): Adjust for stub_sec size having
+	sfpr size added before defining alias symbols.
+	(ppc64_elf_build_stubs): Add stub section padding before
+	copying sfpr contents and defining save/restore alias symbols.
+
+(cherry picked from commit 7dda8d3cf3b089bb7e03c4cdbec827fc6a188c88)
+---
+ bfd/ChangeLog   |  9 +++++++++
+ bfd/elf64-ppc.c | 33 ++++++++++++++++++---------------
+ 2 files changed, 27 insertions(+), 15 deletions(-)
+
+diff --git a/bfd/elf64-ppc.c b/bfd/elf64-ppc.c
+index 6fcdff0..039294f 100644
+--- a/bfd/elf64-ppc.c
++++ b/bfd/elf64-ppc.c
+@@ -6645,7 +6645,7 @@ sfpr_define (struct bfd_link_info *info,
+ 		{
+ 		  s->root.type = bfd_link_hash_defined;
+ 		  s->root.u.def.section = stub_sec;
+-		  s->root.u.def.value = (stub_sec->size
++		  s->root.u.def.value = (stub_sec->size - htab->sfpr->size
+ 					 + h->elf.root.u.def.value);
+ 		  s->ref_regular = 1;
+ 		  s->def_regular = 1;
+@@ -13232,20 +13232,7 @@ ppc64_elf_build_stubs (struct bfd_link_info *info,
+ 
+   for (group = htab->group; group != NULL; group = group->next)
+     if (group->needs_save_res)
+-      {
+-	stub_sec = group->stub_sec;
+-	memcpy (stub_sec->contents + stub_sec->size, htab->sfpr->contents,
+-		htab->sfpr->size);
+-	if (htab->params->emit_stub_syms)
+-	  {
+-	    unsigned int i;
+-
+-	    for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
+-	      if (!sfpr_define (info, &save_res_funcs[i], stub_sec))
+-		return FALSE;
+-	  }
+-	stub_sec->size += htab->sfpr->size;
+-      }
++      group->stub_sec->size += htab->sfpr->size;
+ 
+   if (htab->relbrlt != NULL)
+     htab->relbrlt->reloc_count = 0;
+@@ -13259,6 +13246,22 @@ ppc64_elf_build_stubs (struct bfd_link_info *info,
+ 	}
+ 
+   for (group = htab->group; group != NULL; group = group->next)
++    if (group->needs_save_res)
++      {
++	stub_sec = group->stub_sec;
++	memcpy (stub_sec->contents + stub_sec->size - htab->sfpr->size,
++		htab->sfpr->contents, htab->sfpr->size);
++	if (htab->params->emit_stub_syms)
++	  {
++	    unsigned int i;
++
++	    for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
++	      if (!sfpr_define (info, &save_res_funcs[i], stub_sec))
++		return FALSE;
++	  }
++      }
++
++  for (group = htab->group; group != NULL; group = group->next)
+     if ((stub_sec = group->stub_sec) != NULL)
+       {
+ 	stub_sec_count += 1;
+-- 
+2.9.3
+