* doc/binutils.texi: Add --dwarf-check option.

* dwarf.c (dwarf_check): New global flag.
	(fetch_indexed_string): New function.
	(fetch_indexed_value): New function.
	(get_FORM_name): Add DW_FORM_GNU_str_index and DW_FORM_GNU_addr_index.
	(decode_location_expression): Add DW_OP_GNU_addr_index.
	(read_and_display_attr_value): Add DW_FORM_GNU_str_index,
	DW_FORM_GNU_addr_index, DW_AT_GNU_addr_base, and DW_AT_GNU_ranges_base.
	(get_AT_name): Add new attributes for Fission.
	(process_debug_info): Load new debug sections for Fission.
	(load_debug_info): Check for .debug_info.dwo section.
	(display_loc_list, display_loc_list_dwo): New functions.
	(display_debug_loc): Move logic to above two functions.
	(display_debug_info): Choose abbrev section based on info section.
	(display_debug_types): Likewise.
	(display_trace_info): Likewise.
	(comp_addr_base): New function.
	(display_debug_addr): New function.
	(display_debug_str_offsets): New function.
	(display_debug_ranges): Allow missing range lists.  Suppress
	diagnostics if dwarf_check not set.
	(debug_displays): Add column to select abbrev section.
	* dwarf.h (enum dwarf_section_display_enum): Add new debug sections
	for Fission.
	(struct dwarf_section): Add abbrev_sec field.
	(struct dwarf_section_display): New type.
	(debug_info): Add addr_base, ranges_base fields.
	(dwarf_check): New global variable.
	* objdump.c (usage): Add --dwarf-check option.
	(enum option_values): Add OPTION_DWARF_CHECK.
	(long_options): Add --dwarf-check.
	(main): Likewise.
	* readelf.c (OPTION_DWARF_CHECK): New macro.
	(options): Add --dwarf-check.
	(parse_args): Likewise.
	(process_section_headers): Use const_strneq instead of
	streq.

binutils/dwarf.h

@@ -109,30 +109,6 @@ typedef struct
 }
 DWARF2_Internal_ARange;
 
-struct dwarf_section
-{
-  /* A debug section has a different name when it's stored compressed
-     or not.  COMPRESSED_NAME and UNCOMPRESSED_NAME are the two
-     possibilities.  NAME is set to whichever one is used for this
-     input file, as determined by load_debug_section().  */
-  const char *uncompressed_name;
-  const char *compressed_name;
-  const char *name;
-  unsigned char *start;
-  dwarf_vma address;
-  dwarf_size_type size;
-};
-
-/* A structure containing the name of a debug section
-   and a pointer to a function that can decode it.  */
-struct dwarf_section_display
-{
-  struct dwarf_section section;
-  int (*display) (struct dwarf_section *, void *);
-  int *enabled;
-  unsigned int relocate : 1;
-};
-
 enum dwarf_section_display_enum
 {
   abbrev = 0,
@@ -156,9 +132,45 @@ enum dwarf_section_display_enum
   trace_info,
   trace_abbrev,
   trace_aranges,
+  info_dwo,
+  abbrev_dwo,
+  types_dwo,
+  line_dwo,
+  loc_dwo,
+  macro_dwo,
+  macinfo_dwo,
+  str_dwo,
+  str_index,
+  str_index_dwo,
+  debug_addr,
   max
 };
 
+struct dwarf_section
+{
+  /* A debug section has a different name when it's stored compressed
+     or not.  COMPRESSED_NAME and UNCOMPRESSED_NAME are the two
+     possibilities.  NAME is set to whichever one is used for this
+     input file, as determined by load_debug_section().  */
+  const char *uncompressed_name;
+  const char *compressed_name;
+  const char *name;
+  unsigned char *start;
+  dwarf_vma address;
+  dwarf_size_type size;
+  enum dwarf_section_display_enum abbrev_sec;
+};
+
+/* A structure containing the name of a debug section
+   and a pointer to a function that can decode it.  */
+struct dwarf_section_display
+{
+  struct dwarf_section section;
+  int (*display) (struct dwarf_section *, void *);
+  int *enabled;
+  unsigned int relocate : 1;
+};
+
 extern struct dwarf_section_display debug_displays [];
 
 /* This structure records the information that
@@ -170,6 +182,12 @@ typedef struct
   int            dwarf_version;
   dwarf_vma	 cu_offset;
   dwarf_vma	 base_address;
+  /* This field is filled in when reading the attribute DW_AT_GNU_addr_base and
+     is used with the form DW_AT_GNU_FORM_addr_index.  */
+  dwarf_vma	 addr_base;
+  /* This field is filled in when reading the attribute DW_AT_GNU_ranges_base and
+     is used when calculating ranges.  */
+  dwarf_vma	 ranges_base;
   /* This is an array of offsets to the location list table.  */
   dwarf_vma *    loc_offsets;
   int *          have_frame_base;
@@ -205,6 +223,8 @@ extern int do_wide;
 extern int dwarf_cutoff_level;
 extern unsigned long dwarf_start_die;
 
+extern int dwarf_check;
+
 extern void init_dwarf_regnames (unsigned int);
 extern void init_dwarf_regnames_i386 (void);
 extern void init_dwarf_regnames_x86_64 (void);