* elf32-s390.c (ELIMINATE_COPY_RELOCS): Define as one.

	(elf_s390_adjust_dynamic_symbol): For weak symbols, copy
	ELF_LINK_NON_GOT_REF from weakdef.
	(elf_s390_copy_indirect_symbol): Test whether the weakdef sym has
	already been adjusted before treating it specially.
	* el64-s390.c: Likwise.

1 files changed, 45 insertions, 18 deletions

diff --git a/bfd/elf64-s390.c b/bfd/elf64-s390.c
index 1c10643a5c3..b8c0b6aa69d 100644
--- a/bfd/elf64-s390.c
+++ b/bfd/elf64-s390.c
@@ -405,6 +405,12 @@ elf_s390_is_local_label_name (abfd, name)
 
 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
 
+/* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
+   copying dynamic variables from a shared lib into an app's dynbss
+   section, and instead use a dynamic relocation to point into the
+   shared lib.  */
+#define ELIMINATE_COPY_RELOCS 1
+
 /* The size in bytes of the first entry in the procedure linkage table.  */
 #define PLT_FIRST_ENTRY_SIZE 32
 /* The size in bytes of an entry in the procedure linkage table.  */
@@ -782,7 +788,18 @@ elf_s390_copy_indirect_symbol (bed, dir, ind)
       eind->tls_type = GOT_UNKNOWN;
     }
 
-  _bfd_elf_link_hash_copy_indirect (bed, dir, ind);
+  if (ELIMINATE_COPY_RELOCS
+      && ind->root.type != bfd_link_hash_indirect
+      && (dir->elf_link_hash_flags & ELF_LINK_HASH_DYNAMIC_ADJUSTED) != 0)
+    /* If called to transfer flags for a weakdef during processing
+       of elf_adjust_dynamic_symbol, don't copy ELF_LINK_NON_GOT_REF.
+       We clear it ourselves for ELIMINATE_COPY_RELOCS.  */
+    dir->elf_link_hash_flags |=
+      (ind->elf_link_hash_flags & (ELF_LINK_HASH_REF_DYNAMIC
+				   | ELF_LINK_HASH_REF_REGULAR
+				   | ELF_LINK_HASH_REF_REGULAR_NONWEAK));
+  else
+    _bfd_elf_link_hash_copy_indirect (bed, dir, ind);
 }
 
 static int
@@ -1114,7 +1131,8 @@ elf_s390_check_relocs (abfd, info, sec, relocs)
 			   || h->root.type == bfd_link_hash_defweak
 			   || (h->elf_link_hash_flags
 			       & ELF_LINK_HASH_DEF_REGULAR) == 0))))
-	      || (!info->shared
+	      || (ELIMINATE_COPY_RELOCS
+		  && !info->shared
 		  && (sec->flags & SEC_ALLOC) != 0
 		  && h != NULL
 		  && (h->root.type == bfd_link_hash_defweak
@@ -1452,8 +1470,6 @@ elf_s390_adjust_dynamic_symbol (info, h)
      struct elf_link_hash_entry *h;
 {
   struct elf_s390_link_hash_table *htab;
-  struct elf_s390_link_hash_entry * eh;
-  struct elf_s390_dyn_relocs *p;
   asection *s;
   unsigned int power_of_two;
 
@@ -1499,6 +1515,10 @@ elf_s390_adjust_dynamic_symbol (info, h)
 		  || h->weakdef->root.type == bfd_link_hash_defweak);
       h->root.u.def.section = h->weakdef->root.u.def.section;
       h->root.u.def.value = h->weakdef->root.u.def.value;
+      if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
+	h->elf_link_hash_flags
+	  = ((h->elf_link_hash_flags & ~ELF_LINK_NON_GOT_REF)
+	     | (h->weakdef->elf_link_hash_flags & ELF_LINK_NON_GOT_REF));
       return TRUE;
     }
 
@@ -1524,20 +1544,26 @@ elf_s390_adjust_dynamic_symbol (info, h)
       return TRUE;
     }
 
-  eh = (struct elf_s390_link_hash_entry *) h;
-  for (p = eh->dyn_relocs; p != NULL; p = p->next)
+  if (ELIMINATE_COPY_RELOCS)
     {
-      s = p->sec->output_section;
-      if (s != NULL && (s->flags & SEC_READONLY) != 0)
-	break;
-    }
+      struct elf_s390_link_hash_entry * eh;
+      struct elf_s390_dyn_relocs *p;
 
-  /* If we didn't find any dynamic relocs in read-only sections, then
-     we'll be keeping the dynamic relocs and avoiding the copy reloc.  */
-  if (p == NULL)
-    {
-      h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
-      return TRUE;
+      eh = (struct elf_s390_link_hash_entry *) h;
+      for (p = eh->dyn_relocs; p != NULL; p = p->next)
+	{
+	  s = p->sec->output_section;
+	  if (s != NULL && (s->flags & SEC_READONLY) != 0)
+	    break;
+	}
+
+      /* If we didn't find any dynamic relocs in read-only sections, then
+	 we'll be keeping the dynamic relocs and avoiding the copy reloc.  */
+      if (p == NULL)
+	{
+	  h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
+	  return TRUE;
+	}
     }
 
   /* We must allocate the symbol in our .dynbss section, which will
@@ -1777,7 +1803,7 @@ allocate_dynrelocs (h, inf)
 	  && h->root.type == bfd_link_hash_undefweak)
 	eh->dyn_relocs = NULL;
     }
-  else
+  else if (ELIMINATE_COPY_RELOCS)
     {
       /* For the non-shared case, discard space for relocs against
 	 symbols which turn out to need copy relocs or are not
@@ -2476,7 +2502,8 @@ elf_s390_relocate_section (output_bfd, info, input_bfd, input_section,
 		       && (! info->symbolic
 			   || (h->elf_link_hash_flags
 			       & ELF_LINK_HASH_DEF_REGULAR) == 0))))
-	      || (!info->shared
+	      || (ELIMINATE_COPY_RELOCS
+		  && !info->shared
 		  && h != NULL
 		  && h->dynindx != -1
 		  && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0