Fix PR18374 by making readelf and objdump ignore end-of-list markers in the .debug_loc section if there are relocations against them.

	PR binutils/18374
bin	* dwarf.h (struct dwarf_section): Add reloc_info and num_relocs
	fields.
	(struct dwarf_section_display): Change bitfield to boolean.
	(reloc_at): Add prototype.
	* dwarf.c (display_loc_list): Ignore list terminators if there are
	relocs against them.
	(display_debug_loc): Issue a warning if there are relocs against
	the .debug_loc section.
	(display_displays): Initialise reloc_info and num_relocs fields.
	* objdump.c (load_specific_debug_section): Initialise reloc_info
	and num_relocs fields.
	(reloc_at): New function.
	* readelf.c (is_32bit_abs_reloc): Add IA64's R_IA64_DIS32LSB
	reloc.
	(reloc_at): New function.
	(apply_relocations): Add relocs_return and num_relocs_return
	parameters.  Fill them in with the loaded relocs if non-NULL.
	(dump_section_as_bytes): Update call to apply_relocations.
	(load_specific_debug_section): Initialise reloc_info and
	num_relocs fields.

tests	* binutils-all/pr18374.s: New test file.
	* binutils-all/readelf.exp: Assemble and run the new test.
	* binutils-all/readelf.pr18374: Expected output from readelf.

1 files changed, 41 insertions, 1 deletions

diff --git a/binutils/objdump.c b/binutils/objdump.c
index f87c9c3a8a..f51b6f5a4f 100644
--- a/binutils/objdump.c
+++ b/binutils/objdump.c
@@ -2278,6 +2278,8 @@ load_specific_debug_section (enum dwarf_section_display_enum debug,
   if (section->start != NULL)
     return 1;
 
+  section->reloc_info = NULL;
+  section->num_relocs = 0;  
   section->address = bfd_get_section_vma (abfd, sec);
   section->size = bfd_get_section_size (sec);
   section->start = NULL;
@@ -2308,11 +2310,49 @@ load_specific_debug_section (enum dwarf_section_display_enum debug,
 	          section->name);
           return 0;
         }
-    }
+
+      long reloc_size;
+
+      reloc_size = bfd_get_reloc_upper_bound (abfd, sec);
+      if (reloc_size > 0)
+	{
+	  unsigned long reloc_count;
+	  arelent **relocs;
+
+	  relocs = (arelent **) xmalloc (reloc_size);
+
+	  reloc_count = bfd_canonicalize_reloc (abfd, sec, relocs, NULL);
+	  if (reloc_count == 0)
+	    free (relocs);
+	  else
+	    {
+	      section->reloc_info = relocs;
+	      section->num_relocs = reloc_count;
+	    }
+	}
+    }	
 
   return 1;
 }
 
+bfd_boolean
+reloc_at (struct dwarf_section * dsec, dwarf_vma offset)
+{
+  arelent ** relocs;
+  arelent * rp;
+
+  if (dsec == NULL || dsec->reloc_info == NULL)
+    return FALSE;
+
+  relocs = (arelent **) dsec->reloc_info;
+
+  for (; (rp = * relocs) != NULL; ++ relocs)
+    if (rp->address == offset)
+      return TRUE;
+
+  return FALSE;
+}
+
 int
 load_debug_section (enum dwarf_section_display_enum debug, void *file)
 {