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Binutils support for split-dwarf and dwarf-5

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* dwarf.c (fetch_indexed_string): Added new parameter
	str_offsets_base to calculate the string offset.
	(read_and_display_attr_value): Read DW_AT_str_offsets_base
	attribute.
	(process_debug_info): While allocating memory and initializing
	debug_information, do it for do_debug_info also, if its true.
	(load_separate_debug_files): Load .debug_str_offsets if exists.
	* dwarf.h (struct debug_info): Add str_offsets_base field.
This commit is contained in:
Kumar N, Bhuvanendra
2022-06-22 17:07:25 +01:00
committed by Nick Clifton
parent afc41ffb99
commit f18acc9c4e
3 changed files with 56 additions and 15 deletions
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57
binutils/dwarf.c
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@ -690,8 +690,11 @@ fetch_indirect_line_string (dwarf_vma offset)
}
static const char *
fetch_indexed_string (dwarf_vma idx, struct cu_tu_set *this_set,
dwarf_vma offset_size, bool dwo)
fetch_indexed_string (dwarf_vma idx,
struct cu_tu_set * this_set,
dwarf_vma offset_size,
bool dwo,
dwarf_vma str_offsets_base)
{
enum dwarf_section_display_enum str_sec_idx = dwo ? str_dwo : str;
enum dwarf_section_display_enum idx_sec_idx = dwo ? str_index_dwo : str_index;
@ -780,7 +783,15 @@ fetch_indexed_string (dwarf_vma idx, struct cu_tu_set *this_set,
return _("<index offset is too big>");
}
str_offset = byte_get (curr + index_offset, offset_size);
if (str_offsets_base > 0)
{
if (offset_size == 8)
str_offsets_base -= 16;
else
str_offsets_base -= 8;
}
str_offset = byte_get (curr + index_offset + str_offsets_base, offset_size);
str_offset -= str_section->address;
if (str_offset >= str_section->size)
{
@ -2738,11 +2749,13 @@ read_and_display_attr_value (unsigned long attribute,
/* We have already displayed the form name. */
printf (_("%c(offset: 0x%s): %s"), delimiter,
dwarf_vmatoa ("x", uvalue),
fetch_indexed_string (uvalue, this_set, offset_size, dwo));
fetch_indexed_string (uvalue, this_set, offset_size, dwo,
debug_info_p->str_offsets_base));
else
printf (_("%c(indexed string: 0x%s): %s"), delimiter,
dwarf_vmatoa ("x", uvalue),
fetch_indexed_string (uvalue, this_set, offset_size, dwo));
fetch_indexed_string (uvalue, this_set, offset_size, dwo,
debug_info_p->str_offsets_base));
}
break;
@ -2817,7 +2830,7 @@ read_and_display_attr_value (unsigned long attribute,
break;
}
if ((do_loc || do_debug_loc || do_debug_ranges)
if ((do_loc || do_debug_loc || do_debug_ranges || do_debug_info)
&& num_debug_info_entries == 0
&& debug_info_p != NULL)
{
@ -2835,6 +2848,13 @@ read_and_display_attr_value (unsigned long attribute,
dwarf_vmatoa ("x", debug_info_p->cu_offset));
debug_info_p->rnglists_base = uvalue;
break;
case DW_AT_str_offsets_base:
if (debug_info_p->str_offsets_base)
warn (_("CU @ 0x%s has multiple str_offsets_base values"),
dwarf_vmatoa ("x", debug_info_p->cu_offset));
debug_info_p->str_offsets_base = uvalue;
break;
case DW_AT_frame_base:
have_frame_base = 1;
/* Fall through. */
@ -2973,7 +2993,9 @@ read_and_display_attr_value (unsigned long attribute,
case DW_FORM_strx2:
case DW_FORM_strx3:
case DW_FORM_strx4:
add_dwo_name (fetch_indexed_string (uvalue, this_set, offset_size, false), cu_offset);
add_dwo_name (fetch_indexed_string (uvalue, this_set, offset_size, false,
debug_info_p->str_offsets_base),
cu_offset);
break;
case DW_FORM_string:
add_dwo_name ((const char *) orig_data, cu_offset);
@ -3005,7 +3027,9 @@ read_and_display_attr_value (unsigned long attribute,
case DW_FORM_strx2:
case DW_FORM_strx3:
case DW_FORM_strx4:
add_dwo_dir (fetch_indexed_string (uvalue, this_set, offset_size, false), cu_offset);
add_dwo_dir (fetch_indexed_string (uvalue, this_set, offset_size, false,
debug_info_p->str_offsets_base),
cu_offset);
break;
case DW_FORM_string:
add_dwo_dir ((const char *) orig_data, cu_offset);
@ -3326,6 +3350,7 @@ read_and_display_attr_value (unsigned long attribute,
case DW_AT_location:
case DW_AT_loclists_base:
case DW_AT_rnglists_base:
case DW_AT_str_offsets_base:
case DW_AT_string_length:
case DW_AT_return_addr:
case DW_AT_data_member_location:
@ -3346,7 +3371,8 @@ read_and_display_attr_value (unsigned long attribute,
|| form == DW_FORM_sec_offset
|| form == DW_FORM_loclistx)
{
if (attribute != DW_AT_rnglists_base)
if (attribute != DW_AT_rnglists_base
&& attribute != DW_AT_str_offsets_base)
printf (_(" (location list)"));
}
/* Fall through. */
@ -3579,7 +3605,7 @@ process_debug_info (struct dwarf_section * section,
return false;
}
if ((do_loc || do_debug_loc || do_debug_ranges)
if ((do_loc || do_debug_loc || do_debug_ranges || do_debug_info)
&& num_debug_info_entries == 0
&& ! do_types)
{
@ -3814,7 +3840,7 @@ process_debug_info (struct dwarf_section * section,
continue;
}
if ((do_loc || do_debug_loc || do_debug_ranges)
if ((do_loc || do_debug_loc || do_debug_ranges || do_debug_info)
&& num_debug_info_entries == 0
&& alloc_num_debug_info_entries > unit
&& ! do_types)
@ -3836,6 +3862,7 @@ process_debug_info (struct dwarf_section * section,
debug_information [unit].max_range_lists= 0;
debug_information [unit].num_range_lists = 0;
debug_information [unit].rnglists_base = 0;
debug_information [unit].str_offsets_base = 0;
}
if (!do_loc && dwarf_start_die == 0)
@ -4106,7 +4133,7 @@ process_debug_info (struct dwarf_section * section,
/* Set num_debug_info_entries here so that it can be used to check if
we need to process .debug_loc and .debug_ranges sections. */
if ((do_loc || do_debug_loc || do_debug_ranges)
if ((do_loc || do_debug_loc || do_debug_ranges || do_debug_info)
&& num_debug_info_entries == 0
&& ! do_types)
{
@ -6254,7 +6281,7 @@ display_debug_macro (struct dwarf_section *section,
READ_ULEB (lineno, curr, end);
READ_ULEB (offset, curr, end);
string = (const unsigned char *)
fetch_indexed_string (offset, NULL, offset_size, false);
fetch_indexed_string (offset, NULL, offset_size, false, 0);
if (op == DW_MACRO_define_strx)
printf (" DW_MACRO_define_strx ");
else
@ -7869,7 +7896,7 @@ display_debug_str_offsets (struct dwarf_section *section,
SAFE_BYTE_GET_AND_INC (offset, curr, entry_length, entries_end);
if (dwo)
string = (const unsigned char *)
fetch_indexed_string (idx, NULL, entry_length, dwo);
fetch_indexed_string (idx, NULL, entry_length, dwo, 0);
else
string = fetch_indirect_string (offset);
@ -11914,6 +11941,8 @@ load_separate_debug_files (void * file, const char * filename)
{
/* Load the .debug_addr section, if it exists. */
load_debug_section (debug_addr, file);
/* Load the .debug_str_offsets section, if it exists. */
load_debug_section (str_index, file);
free_dwo_info ();