ELF: Add _bfd_elf_add_dynamic_tags

All ELF backends with shared library support need to add dynamic tags.
Add dt_pltgot_required and dt_jmprel_required to elf_link_hash_table to
indicate that DT_PLTGOT and DT_JMPREL are required dynamic tags.

1. Add _bfd_elf_add_dynamic_tags to add common dynamic tags.
2. Add _bfd_elf_maybe_vxworks_add_dynamic_tags to add common VxWorks
dynamic tags.

	* elf-bfd.h (elf_link_hash_table): Add dt_pltgot_required and
	dt_jmprel_required.
	(_bfd_elf_add_dynamic_tags): New.
	* elf-m10300.c (_bfd_mn10300_elf_size_dynamic_sections): Call
	_bfd_elf_add_dynamic_tags.
	* elf32-arc.c (elf_arc_size_dynamic_sections): Likewise.
	* elf32-bfin.c (elf32_bfinfdpic_size_dynamic_sections): Likewise.
	* elf32-cr16.c (_bfd_cr16_elf_size_dynamic_sections): Likewise.
	* elf32-frv.c (elf32_frvfdpic_size_dynamic_sections): Likewise.
	* elf32-lm32.c (lm32_elf_size_dynamic_sections): Likewise.
	* elf32-m32r.c (m32r_elf_size_dynamic_sections): Likewise.
	* elf32-m68k.c (elf_m68k_size_dynamic_sections): Likewise.
	* elf32-microblaze.c (microblaze_elf_size_dynamic_sections):
	Likewise.
	* elf32-nds32.c (nds32_elf_size_dynamic_sections): Likewise.
	* elf32-nios2.c (nios2_elf32_size_dynamic_sections): Likewise.
	* elf32-or1k.c (or1k_elf_size_dynamic_sections): Likewise.
	* elf32-s390.c (elf_s390_size_dynamic_sections): Likewise.
	* elf32-tilepro.c (tilepro_elf_size_dynamic_sections): Likewise.
	* elf32-vax.c (elf_vax_size_dynamic_sections): Likewise.
	* elf64-alpha.c (elf64_alpha_size_dynamic_sections): Likewise.
	* elf64-s390.c (elf_s390_size_dynamic_sections): Likewise.
	* elfnn-aarch64.c (elfNN_aarch64_size_dynamic_sections):
	Likewise.
	* elfnn-riscv.c (riscv_elf_size_dynamic_sections): Likewise.
	* elfxx-tilegx.c (tilegx_elf_size_dynamic_sections): Likewise.
	* elf32-arm.c (elf32_arm_size_dynamic_sections): Call
	_bfd_elf_maybe_vxworks_add_dynamic_tags.
	* elf32-ppc.c (ppc_elf_size_dynamic_sections): Likewise.
	* elfxx-sparc.c (_bfd_sparc_elf_size_dynamic_sections):
	Likewise.
	* elfxx-x86.c (_bfd_x86_elf_link_hash_table_create): Likewise.
	(_bfd_x86_elf_size_dynamic_sections): Likewise.
	* elfxx-x86.h (elf_x86_link_hash_table): Remove dt_reloc,
	dt_reloc_sz and dt_reloc_ent.
	* elf-vxworks.c (_bfd_elf_maybe_vxworks_add_dynamic_tags): New.
	* elf-vxworks.h (_bfd_elf_maybe_vxworks_add_dynamic_tags):
	Likewise.
	* elf32-hppa.c (elf32_hppa_link_hash_table_create): Set
	etab.dt_pltgot_required.
	(elf32_hppa_size_dynamic_sections): Call
	_bfd_elf_add_dynamic_tags.
	* elf32-metag.c (elf_metag_link_hash_table_create): Set
	etab.dt_pltgot_required.
	(elf_metag_size_dynamic_sections): Call _bfd_elf_add_dynamic_tags.
	* elf32-sh.c (sh_elf_link_hash_table_create): Set
	root.dt_pltgot_required for FDPIC output.
	(sh_elf_size_dynamic_sections): Call
	_bfd_elf_maybe_vxworks_add_dynamic_tags.
	* elf32-xtensa.c (elf_xtensa_link_hash_table_create): Set
	elf.dt_pltgot_required.
	(elf_xtensa_size_dynamic_sections): Call
	_bfd_elf_add_dynamic_tags.
	* elf64-hppa.c (elf64_hppa_hash_table_create): Set
	root.dt_pltgot_required.
	(elf64_hppa_size_dynamic_sections): Call
	_bfd_elf_add_dynamic_tags.
	* elfnn-ia64.c (elfNN_ia64_hash_table_create): Set
	root.dt_pltgot_required.
	(elfNN_ia64_size_dynamic_sections): Set root.dt_jmprel_required
	for rel_pltoff_sec.  Call _bfd_elf_add_dynamic_tags.
	* elflink.c (_bfd_elf_add_dynamic_tags): New.

1 files changed, 2 insertions, 51 deletions

diff --git a/bfd/elf32-arc.c b/bfd/elf32-arc.c
index 06ee60a..4d9d6b9 100644
--- a/bfd/elf32-arc.c
+++ b/bfd/elf32-arc.c
@@ -2707,7 +2707,6 @@ elf_arc_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
   bfd *dynobj;
   asection *s;
   bfd_boolean relocs_exist = FALSE;
-  bfd_boolean reltext_exist = FALSE;
   struct elf_link_hash_table *htab = elf_hash_table (info);
 
   dynobj = htab->dynobj;
@@ -2762,29 +2761,7 @@ elf_arc_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
       else if (strncmp (s->name, ".rela", 5) == 0)
 	{
 	  if (s->size != 0 && s != htab->srelplt)
-	    {
-	      if (!reltext_exist)
-		{
-		  const char *name = s->name + 5;
-		  bfd *ibfd;
-		  for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link.next)
-		    if (bfd_get_flavour (ibfd) == bfd_target_elf_flavour
-			&& ibfd->flags & DYNAMIC)
-		      {
-			asection *target = bfd_get_section_by_name (ibfd, name);
-			if (target != NULL
-			    && elf_section_data (target)->sreloc == s
-			    && ((target->output_section->flags
-				 & (SEC_READONLY | SEC_ALLOC))
-				== (SEC_READONLY | SEC_ALLOC)))
-			  {
-			    reltext_exist = TRUE;
-			    break;
-			  }
-		      }
-		}
-	      relocs_exist = TRUE;
-	    }
+	    relocs_exist = TRUE;
 
 	  /* We use the reloc_count field as a counter if we need to
 	     copy relocs into the output file.  */
@@ -2811,33 +2788,7 @@ elf_arc_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
 	return FALSE;
     }
 
-  if (htab->dynamic_sections_created)
-    {
-      /* TODO: Check if this is needed.  */
-      if (!bfd_link_pic (info))
-	if (!_bfd_elf_add_dynamic_entry (info, DT_DEBUG, 0))
-		return FALSE;
-
-      if (htab->splt && (htab->splt->flags & SEC_EXCLUDE) == 0)
-	if (!_bfd_elf_add_dynamic_entry (info, DT_PLTGOT, 0)
-	    || !_bfd_elf_add_dynamic_entry (info, DT_PLTRELSZ, 0)
-	    || !_bfd_elf_add_dynamic_entry (info, DT_PLTREL, DT_RELA)
-	    || !_bfd_elf_add_dynamic_entry (info, DT_JMPREL, 0))
-	  return FALSE;
-
-      if (relocs_exist)
-	if (!_bfd_elf_add_dynamic_entry (info, DT_RELA, 0)
-	    || !_bfd_elf_add_dynamic_entry (info, DT_RELASZ, 0)
-	    || !_bfd_elf_add_dynamic_entry (info, DT_RELAENT,
-					    sizeof (Elf32_External_Rela)))
-	  return FALSE;
-
-      if (reltext_exist)
-	if (!_bfd_elf_add_dynamic_entry (info, DT_TEXTREL, 0))
-	  return FALSE;
-    }
-
-  return TRUE;
+  return _bfd_elf_add_dynamic_tags (output_bfd, info, relocs_exist);
 }