* elf-bfd.h (enum elf_link_info_type): New.

	(struct bfd_elf_section_data): Remove stab_info and merge_info
	fields, add sec_info and sec_info_type.
	(struct elf_obj_tdata): Add eh_frame_hdr field.
	(_bfd_elf_discard_section_eh_frame): New prototype.
	(_bfd_elf_discard_section_eh_frame_hdr): Likewise.
	(_bfd_elf_eh_frame_section_offset): Likewise.
	(_bfd_elf_write_section_eh_frame): Likewise.
	(_bfd_elf_write_section_eh_frame_hdr): Likewise.
	* Makefile.am (BFD32_BACKENDS): Add elf-eh-frame.lo.
	(BFD32_BACKENDS_CFILES): Add elf-eh-frame.c.
	(elf-eh-frame.lo): New.
	* Makefile.in: Rebuilt.
	* configure.in (elf): Add elf-eh-frame.lo.
	* configure: Rebuilt.
	* elf.c (_bfd_elf_print_private_bfd_data): Support PT_GNU_EH_FRAME.
	(map_sections_to_segments): Create PT_GNU_EH_FRAME if requested.
	(get_program_header_size): Take into account PT_GNU_EH_FRAME
	segment.
	(_bfd_elf_rela_local_sym): Use sec_info_type and sec_info.
	(_bfd_elf_rel_local_sym): Likewise.
	(_bfd_elf_section_offset): Likewise.  Call
	_bfd_elf_eh_frame_section_offset too.
	* elfxx-ia64.c (elfNN_ia64_relocate_section): Use sec_info_type and
	sec_info.
	* elf64-alpha.c (elf64_alpha_relocate_section): Likewise.
	* elf-eh-frame.c: New file.
	* elflink.h (elf_link_add_object_symbols): Don't optimize SHF_MERGE
	.stab sections.  Set sec_info_type, use sec_info instead
	of merge_info and stab_info.
	(elf_link_create_dynamic_sections): Create .eh_frame_hdr section
	if --eh-frame-hdr.
	(elf_bfd_final_link): Write .eh_frame_hdr section.
	(elf_link_sec_merge_syms): Use sec_info_type and sec_info.
	(elf_link_input_bfd): Likewise.
	Call _bfd_elf_write_section_eh_frame to write .eh_frame sections.
	(elf_bfd_discard_info): Add output_bfd argument.
	Call _bfd_elf_discard_section_eh_frame and
	_bfd_elf_discard_section_eh_frame_hdr.
	(elf_section_ignore_discarded_relocs): Use sec_info_type, not section
	names.
	* bfd-in.h (bfd_elf32_discard_info, bfd_elf64_discard_info): Adjust
	prototypes.
	* bfd-in2.h (bfd_elf32_discard_info, bfd_elf64_discard_info): Likewise.

	* elf/common.h (PT_GNU_EH_FRAME): Define.
	* bfdlink.h (struct bfd_link_info): Add eh_frame_hdr field.

	* emultempl/elf32.em (finish): Supply output_bfd
	to bfd_elf*_discard_info.
	(OPTION_EH_FRAME_HDR): Define.
	(longopts): Add --eh-frame-hdr.
	(parse_args): Handle it.
	(list_options): Add --eh-frame-hdr to help.
	* emultempl/hppaelf.em (finish): Supply output_bfd
	to bfd_elf*_discard_info.
	* scripttempl/elf.sc (.eh_frame_hdr): Add.

	* readelf.c (get_segment_type): Support PT_GNU_EH_FRAME.

2 files changed, 9 insertions, 2 deletions

diff --git a/ld/emultempl/elf32.em b/ld/emultempl/elf32.em
index 9974b24..ef71595 100644
--- a/ld/emultempl/elf32.em
+++ b/ld/emultempl/elf32.em
@@ -1329,7 +1329,7 @@ cat >>e${EMULATION_NAME}.c <<EOF
 static void
 gld${EMULATION_NAME}_finish ()
 {
-  if (bfd_elf${ELFSIZE}_discard_info (&link_info))
+  if (bfd_elf${ELFSIZE}_discard_info (output_bfd, &link_info))
     {
       /* Resize the sections.  */
       lang_size_sections (stat_ptr->head, abs_output_section,
@@ -1431,6 +1431,7 @@ cat >>e${EMULATION_NAME}.c <<EOF
 #define OPTION_DISABLE_NEW_DTAGS	(400)
 #define OPTION_ENABLE_NEW_DTAGS		(OPTION_DISABLE_NEW_DTAGS + 1)
 #define OPTION_GROUP			(OPTION_ENABLE_NEW_DTAGS + 1)
+#define OPTION_EH_FRAME_HDR		(OPTION_GROUP + 1)
 
 static struct option longopts[] =
 {
@@ -1444,6 +1445,7 @@ cat >>e${EMULATION_NAME}.c <<EOF
   {"disable-new-dtags", no_argument, NULL, OPTION_DISABLE_NEW_DTAGS},
   {"enable-new-dtags", no_argument, NULL, OPTION_ENABLE_NEW_DTAGS},
   {"enable-new-dtags", no_argument, NULL, OPTION_ENABLE_NEW_DTAGS},
+  {"eh-frame-hdr", no_argument, NULL, OPTION_EH_FRAME_HDR},
   {"Bgroup", no_argument, NULL, OPTION_GROUP},
   {"Bgroup", no_argument, NULL, OPTION_GROUP},
 EOF
@@ -1504,6 +1506,10 @@ cat >>e${EMULATION_NAME}.c <<EOF
       link_info.new_dtags = true;
       break;
 
+    case OPTION_EH_FRAME_HDR:
+      link_info.eh_frame_hdr = true;
+      break;
+
     case OPTION_GROUP:
       link_info.flags_1 |= (bfd_vma) DF_1_GROUP;
       /* Groups must be self-contained.  */
@@ -1579,6 +1585,7 @@ cat >>e${EMULATION_NAME}.c <<EOF
   fprintf (file, _("  -Bgroup\t\tSelects group name lookup rules for DSO\n"));
   fprintf (file, _("  --disable-new-dtags\tDisable new dynamic tags\n"));
   fprintf (file, _("  --enable-new-dtags\tEnable new dynamic tags\n"));
+  fprintf (file, _("  --eh-frame-hdr\tCreate .eh_frame_hdr section\n"));
   fprintf (file, _("  -z combreloc\t\tMerge dynamic relocs into one section and sort\n"));
   fprintf (file, _("  -z defs\t\tDisallows undefined symbols\n"));
   fprintf (file, _("  -z initfirst\t\tMark DSO to be initialized first at runtime\n"));
diff --git a/ld/emultempl/hppaelf.em b/ld/emultempl/hppaelf.em
index c8bd188..0b49b63 100644
--- a/ld/emultempl/hppaelf.em
+++ b/ld/emultempl/hppaelf.em
@@ -254,7 +254,7 @@ gld${EMULATION_NAME}_finish ()
      ie. doesn't affect any code, so we can delay resizing the
      sections.  It's likely we'll resize everything in the process of
      adding stubs.  */
-  if (bfd_elf${ELFSIZE}_discard_info (&link_info))
+  if (bfd_elf${ELFSIZE}_discard_info (output_bfd, &link_info))
     need_laying_out = 1;
 
   /* Call into the BFD backend to do the real work.  */