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Binutils support for dwarf-5 (location and range lists related)

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* dwarf.h (struct debug_info): Add rnglists_base field.
	* dwarf.c (read_and_display_attr_value): Read attribute DW_AT_rnglists_base.
	(display_debug_rnglists_list): While handling DW_RLE_base_addressx,
  	DW_RLE_startx_endx, DW_RLE_startx_length items, pass the proper parameter
	value to fetch_indexed_addr(), i.e. fetch the proper entry in .debug_addr section.
	(display_debug_ranges): Add rnglists_base to the .debug_rnglists base address.
	(load_separate_debug_files): Load .debug_addr section, if exists.
This commit is contained in:
Nick Clifton
2022-06-21 16:37:27 +01:00
parent acd65fa610
commit ec41dd75c8
3 changed files with 51 additions and 13 deletions
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10
binutils/ChangeLog
View File

@ -1,3 +1,13 @@
2022-06-21 Kumar N, Bhuvanendra via Binutils <Kavitha.Natarajan@amd.com>
* dwarf.h (struct debug_info): Add rnglists_base field.
* dwarf.c (read_and_display_attr_value): Read attribute DW_AT_rnglists_base.
(display_debug_rnglists_list): While handling DW_RLE_base_addressx,
DW_RLE_startx_endx, DW_RLE_startx_length items, pass the proper parameter
value to fetch_indexed_addr(), i.e. fetch the proper entry in .debug_addr section.
(display_debug_ranges): Add rnglists_base to the .debug_rnglists base address.
(load_separate_debug_files): Load .debug_addr section, if exists.
2022-05-20 Nick Clifton <nickc@redhat.com>
* dwarf.c (dwarf_select_sections_by_names): Return zero if no

53
binutils/dwarf.c
View File

@ -2825,7 +2825,12 @@ read_and_display_attr_value (unsigned long attribute,
dwarf_vmatoa ("x", debug_info_p->cu_offset));
debug_info_p->loclists_base = uvalue;
break;
case DW_AT_rnglists_base:
if (debug_info_p->rnglists_base)
warn (_("CU @ 0x%s has multiple rnglists_base values"),
dwarf_vmatoa ("x", debug_info_p->cu_offset));
debug_info_p->rnglists_base = uvalue;
break;
case DW_AT_frame_base:
have_frame_base = 1;
/* Fall through. */
@ -3316,6 +3321,7 @@ read_and_display_attr_value (unsigned long attribute,
/* Fall through. */
case DW_AT_location:
case DW_AT_loclists_base:
case DW_AT_rnglists_base:
case DW_AT_string_length:
case DW_AT_return_addr:
case DW_AT_data_member_location:
@ -3335,7 +3341,10 @@ read_and_display_attr_value (unsigned long attribute,
&& (form == DW_FORM_data4 || form == DW_FORM_data8))
|| form == DW_FORM_sec_offset
|| form == DW_FORM_loclistx)
printf (_(" (location list)"));
{
if (attribute != DW_AT_rnglists_base)
printf (_(" (location list)"));
}
/* Fall through. */
case DW_AT_allocated:
case DW_AT_associated:
@ -3822,6 +3831,7 @@ process_debug_info (struct dwarf_section * section,
debug_information [unit].range_lists = NULL;
debug_information [unit].max_range_lists= 0;
debug_information [unit].num_range_lists = 0;
debug_information [unit].rnglists_base = 0;
}
if (!do_loc && dwarf_start_die == 0)
@ -7946,9 +7956,16 @@ display_debug_rnglists_list (unsigned char * start,
unsigned char * finish,
unsigned int pointer_size,
dwarf_vma offset,
dwarf_vma base_address)
dwarf_vma base_address,
unsigned int offset_size)
{
unsigned char *next = start;
unsigned int debug_addr_section_hdr_len;
if (offset_size == 4)
debug_addr_section_hdr_len = 8;
else
debug_addr_section_hdr_len = 16;
while (1)
{
@ -7978,20 +7995,24 @@ display_debug_rnglists_list (unsigned char * start,
READ_ULEB (base_address, start, finish);
print_dwarf_vma (base_address, pointer_size);
printf (_("(base address index) "));
base_address = fetch_indexed_addr (base_address, pointer_size);
base_address = fetch_indexed_addr ((base_address * pointer_size)
+ debug_addr_section_hdr_len, pointer_size);
print_dwarf_vma (base_address, pointer_size);
printf (_("(base address)\n"));
break;
case DW_RLE_startx_endx:
READ_ULEB (begin, start, finish);
READ_ULEB (end, start, finish);
begin = fetch_indexed_addr (begin, pointer_size);
end = fetch_indexed_addr (begin, pointer_size);
begin = fetch_indexed_addr ((begin * pointer_size)
+ debug_addr_section_hdr_len, pointer_size);
end = fetch_indexed_addr ((begin * pointer_size)
+ debug_addr_section_hdr_len, pointer_size);
break;
case DW_RLE_startx_length:
READ_ULEB (begin, start, finish);
READ_ULEB (length, start, finish);
begin = fetch_indexed_addr (begin, pointer_size);
begin = fetch_indexed_addr ((begin * pointer_size)
+ debug_addr_section_hdr_len, pointer_size);
end = begin + length;
break;
case DW_RLE_offset_pair:
@ -8017,6 +8038,7 @@ display_debug_rnglists_list (unsigned char * start,
rlet = DW_RLE_end_of_list;
break;
}
if (rlet == DW_RLE_end_of_list)
break;
if (rlet == DW_RLE_base_address || rlet == DW_RLE_base_addressx)
@ -8057,6 +8079,7 @@ display_debug_ranges (struct dwarf_section *section,
/* Initialize it due to a false compiler warning. */
unsigned char address_size = 0;
dwarf_vma last_offset = 0;
unsigned int offset_size = 0;
if (bytes == 0)
{
@ -8068,10 +8091,10 @@ display_debug_ranges (struct dwarf_section *section,
if (is_rnglists)
{
dwarf_vma initial_length;
unsigned char segment_selector_size;
unsigned int offset_size, offset_entry_count;
unsigned short version;
dwarf_vma initial_length;
unsigned char segment_selector_size;
unsigned int offset_entry_count;
unsigned short version;
/* Get and check the length of the block. */
SAFE_BYTE_GET_AND_INC (initial_length, start, 4, finish);
@ -8244,7 +8267,8 @@ display_debug_ranges (struct dwarf_section *section,
(unsigned long) offset, i);
continue;
}
next = section_begin + offset;
next = section_begin + offset + debug_info_p->rnglists_base;
/* If multiple DWARF entities reference the same range then we will
have multiple entries in the `range_entries' list for the same
@ -8276,7 +8300,7 @@ display_debug_ranges (struct dwarf_section *section,
if (is_rnglists)
display_debug_rnglists_list
(start, finish, pointer_size, offset, base_address);
(start, finish, pointer_size, offset, base_address, offset_size);
else
display_debug_ranges_list
(start, finish, pointer_size, offset, base_address);
@ -11884,6 +11908,9 @@ load_separate_debug_files (void * file, const char * filename)
&& load_debug_section (abbrev, file)
&& load_debug_section (info, file))
{
/* Load the .debug_addr section, if it exists. */
load_debug_section (debug_addr, file);
free_dwo_info ();
if (process_debug_info (& debug_displays[info].section, file, abbrev,

1
binutils/dwarf.h
View File

@ -192,6 +192,7 @@ typedef struct
dwarf_vma * range_lists;
unsigned int num_range_lists;
unsigned int max_range_lists;
dwarf_vma rnglists_base;
}
debug_info;