* 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.

1 files changed, 42 insertions, 10 deletions

diff --git a/bfd/elf.c b/bfd/elf.c
index a473366..98d3cd2 100644
--- a/bfd/elf.c
+++ b/bfd/elf.c
@@ -812,6 +812,7 @@ _bfd_elf_print_private_bfd_data (abfd, farg)
 	    case PT_NOTE: pt = "NOTE"; break;
 	    case PT_SHLIB: pt = "SHLIB"; break;
 	    case PT_PHDR: pt = "PHDR"; break;
+	    case PT_GNU_EH_FRAME: pt = "EH_FRAME"; break;
 	    default: sprintf (buf, "0x%lx", p->p_type); pt = buf; break;
 	    }
 	  fprintf (f, "%8s off    0x", pt);
@@ -2794,7 +2795,7 @@ map_sections_to_segments (abfd)
   asection **hdrpp;
   boolean phdr_in_segment = true;
   boolean writable;
-  asection *dynsec;
+  asection *dynsec, *eh_frame_hdr;
   bfd_size_type amt;
 
   if (elf_tdata (abfd)->segment_map != NULL)
@@ -3034,6 +3035,24 @@ map_sections_to_segments (abfd)
 	}
     }
 
+  /* If there is a .eh_frame_hdr section, throw in a PT_GNU_EH_FRAME
+     segment.  */
+  eh_frame_hdr = bfd_get_section_by_name (abfd, ".eh_frame_hdr");
+  if (eh_frame_hdr != NULL && (eh_frame_hdr->flags & SEC_LOAD))
+    {
+      amt = sizeof (struct elf_segment_map);
+      m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
+      if (m == NULL)
+	goto error_return;
+      m->next = NULL;
+      m->p_type = PT_GNU_EH_FRAME;
+      m->count = 1;
+      m->sections[0] = eh_frame_hdr;
+
+      *pm = m;
+      pm = &m->next;
+    }
+
   free (sections);
   sections = NULL;
 
@@ -3548,6 +3567,13 @@ get_program_header_size (abfd)
       ++segs;
     }
 
+  if (elf_tdata (abfd)->eh_frame_hdr
+      && bfd_get_section_by_name (abfd, ".eh_frame_hdr") != NULL)
+    {
+      /* We need a PT_GNU_EH_FRAME segment.  */
+      ++segs;
+    }
+
   for (s = abfd->sections; s != NULL; s = s->next)
     {
       if ((s->flags & SEC_LOAD) != 0
@@ -6392,14 +6418,14 @@ _bfd_elf_rela_local_sym (abfd, sym, sec, rel)
 		+ sym->st_value);
   if ((sec->flags & SEC_MERGE)
       && ELF_ST_TYPE (sym->st_info) == STT_SECTION
-      && elf_section_data (sec)->merge_info)
+      && elf_section_data (sec)->sec_info_type == ELF_INFO_TYPE_MERGE)
     {
       asection *msec;
 
       msec = sec;
       rel->r_addend =
 	_bfd_merged_section_offset (abfd, &msec,
-				    elf_section_data (sec)->merge_info,
+				    elf_section_data (sec)->sec_info,
 				    sym->st_value + rel->r_addend,
 				    (bfd_vma) 0)
 	- relocation;
@@ -6417,11 +6443,11 @@ _bfd_elf_rel_local_sym (abfd, sym, psec, addend)
 {     
   asection *sec = *psec;
 
-  if (elf_section_data (sec)->merge_info == NULL)
+  if (elf_section_data (sec)->sec_info_type != ELF_INFO_TYPE_MERGE)
     return sym->st_value + addend;
 
   return _bfd_merged_section_offset (abfd, psec,
-				     elf_section_data (sec)->merge_info,
+				     elf_section_data (sec)->sec_info,
 				     sym->st_value + addend, (bfd_vma) 0);
 }
 
@@ -6435,9 +6461,15 @@ _bfd_elf_section_offset (abfd, info, sec, offset)
   struct bfd_elf_section_data *sec_data;
 
   sec_data = elf_section_data (sec);
-  if (sec_data->stab_info != NULL)
-    return _bfd_stab_section_offset
-	   (abfd, &elf_hash_table (info)->stab_info,
-	    sec, &sec_data->stab_info, offset);
-  return offset;
+  switch (sec_data->sec_info_type)
+    {
+    case ELF_INFO_TYPE_STABS:
+      return _bfd_stab_section_offset
+	(abfd, &elf_hash_table (info)->merge_info, sec, &sec_data->sec_info,
+	 offset);
+    case ELF_INFO_TYPE_EH_FRAME:
+      return _bfd_elf_eh_frame_section_offset (abfd, sec, offset);
+    default:
+      return offset;
+    }
 }