2006-07-21  Frederic Riss  <frederic.riss@st.com>

	* dwarf2read.c (struct dwarf2_per_objfile): Add has_section_at_zero 
	field.
	(dwarf2_has_info): Initialize dwarf2_per_objfile->has_section_at_zero.
	(dwarf2_get_pc_bounds): Use dwarf2_per_objfile->has_section_at_zero 
	instead of HAS_RELOC test.
	(read_partial_die): Ditto.


Index: dwarf2read.c
===================================================================
RCS file: /cvs/src/src/gdb/dwarf2read.c,v
retrieving revision 1.200
diff -u -p -r1.200 dwarf2read.c
--- dwarf2read.c	12 Jul 2006 21:14:57 -0000	1.200
+++ dwarf2read.c	20 Jul 2006 16:24:42 -0000
@@ -180,6 +180,10 @@ struct dwarf2_per_objfile
   /* A chain of compilation units that are currently read in, so that
      they can be freed later.  */
   struct dwarf2_per_cu_data *read_in_chain;
+
+  /* A flag indicating wether this objfile has a section loaded at a
+     VMA of 0.  */
+  int has_section_at_zero;
 };
 
 static struct dwarf2_per_objfile *dwarf2_per_objfile;
@@ -1083,6 +1087,7 @@ int
 dwarf2_has_info (struct objfile *objfile)
 {
   struct dwarf2_per_objfile *data;
+  asection *lower_sect = NULL;
 
   /* Initialize per-objfile state.  */
   data = obstack_alloc (&objfile->objfile_obstack, sizeof (*data));
@@ -1090,6 +1095,10 @@ dwarf2_has_info (struct objfile *objfile
   set_objfile_data (objfile, dwarf2_objfile_data_key, data);
   dwarf2_per_objfile = data;
 
+  bfd_map_over_sections (objfile->obfd, find_lowest_section, &lower_sect);
+  if (lower_sect && bfd_section_vma (objfile->obfd, lower_sect) == 0)
+    data->has_section_at_zero = 1;
+
   dwarf_info_section = 0;
   dwarf_abbrev_section = 0;
   dwarf_line_section = 0;
@@ -1099,7 +1108,7 @@ dwarf2_has_info (struct objfile *objfile
   dwarf_eh_frame_section = 0;
   dwarf_ranges_section = 0;
   dwarf_loc_section = 0;
-  
+
   bfd_map_over_sections (objfile->obfd, dwarf2_locate_sections, NULL);
   return (dwarf_info_section != NULL && dwarf_abbrev_section != NULL);
 }
@@ -3177,7 +3186,7 @@ dwarf2_get_pc_bounds (struct die_info *d
      labels are not in the output, so the relocs get a value of 0.
      If this is a discarded function, mark the pc bounds as invalid,
      so that GDB will ignore it.  */
-  if (low == 0 && (bfd_get_file_flags (obfd) & HAS_RELOC) == 0)
+  if (low == 0 && !dwarf2_per_objfile->has_section_at_zero)
     return 0;
 
   *lowpc = low;
@@ -5505,7 +5514,7 @@ read_partial_die (struct partial_die_inf
   if (has_low_pc_attr && has_high_pc_attr
       && part_die->lowpc < part_die->highpc
       && (part_die->lowpc != 0
-	  || (bfd_get_file_flags (abfd) & HAS_RELOC)))
+	  || dwarf2_per_objfile->has_section_at_zero))
     part_die->has_pc_info = 1;
   return info_ptr;
 }