2005-01-10 H.J. Lu <hongjiu.lu@intel.com>
BZ 635 readelf.c (saved_base_address): Removed. (decode_64bit_range): Likewise. (decode_range): Likewise. (display_64bit_debug_ranges): Likewise. (debug_info): Add range_lists, num_range_lists and max_range_lists. (read_and_display_attr_value): Handle do_debug_ranges. (process_debug_info): Likewise. (display_debug_ranges): Rewrite. (process_object): Free range_lists.
This commit is contained in:
H.J. Lu
parent
324007b99e
commit
0853c0928a
@ -1,3 +1,17 @@
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2005-01-10 H.J. Lu <hongjiu.lu@intel.com>
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BZ 635
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readelf.c (saved_base_address): Removed.
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(decode_64bit_range): Likewise.
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(decode_range): Likewise.
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(display_64bit_debug_ranges): Likewise.
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(debug_info): Add range_lists, num_range_lists and
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max_range_lists.
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(read_and_display_attr_value): Handle do_debug_ranges.
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(process_debug_info): Likewise.
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(display_debug_ranges): Rewrite.
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(process_object): Free range_lists.
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2005-01-10 Andreas Schwab <schwab@suse.de>
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* configure.in: Don't define SKIP_ZEROES.
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@ -170,7 +170,6 @@ int do_notes;
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int is_32bit_elf;
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int have_frame_base;
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int need_base_address;
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unsigned long saved_base_address;
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struct group_list
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{
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@ -7895,120 +7894,6 @@ decode_location_expression (unsigned char * data,
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return need_frame_base;
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}
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/* Decode a DW_AT_ranges attribute for 64bit DWARF3 . */
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static void
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decode_64bit_range (unsigned long offset, bfd_vma base_address)
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{
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const char * start = debug_range_contents + offset;
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const char * end = debug_range_contents + debug_range_size;
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do
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{
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bfd_vma a;
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bfd_vma b;
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a = byte_get ((unsigned char *) start, 8);
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b = byte_get ((unsigned char *) start + 8, 8);
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if (a == 0xffffffff)
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{
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base_address = b;
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}
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else if (a == 0 && b == 0)
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break;
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else if (a > b)
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printf (_(" [corrupt: start > end]"));
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else
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{
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printf (" ");
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print_vma (base_address + a, PREFIX_HEX);
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printf (" - ");
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print_vma (base_address + b, PREFIX_HEX);
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printf (", ");
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}
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start += 16;
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}
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while (start < end);
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}
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/* Decode a DW_AT_ranges attribute. */
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static void
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decode_range (unsigned long offset, bfd_vma base_address)
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{
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const char * start;
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const char * end;
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if (offset >= (debug_range_size - 8))
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{
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printf (_("[corrupt: offset is outside the .debug_ranges section]"));
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return;
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}
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/* Since all entries in the .debug_ranges section are pairs of either
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4-byte integers (32-bit DWARF3) or 8-byte integers (64-bit DWARF3)
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the offset should always be a multiple of 8 bytes. */
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if (offset % 8)
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{
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printf (_("[corrupt: offset is not a multiple of 8]"));
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return;
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}
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start = debug_range_contents + offset;
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if (offset > 0
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/* Be paranoid - check to see if the previous
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two words were and end-of-range marker. */
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&& (byte_get ((unsigned char *) start - 4, 4) != 0
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|| byte_get ((unsigned char *) start - 8, 4) != 0))
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{
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printf (_("[corrupt: offset is not at the start of a range]"));
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return;
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}
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end = debug_range_contents + debug_range_size;
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printf ("(");
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do
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{
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unsigned long a;
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unsigned long b;
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a = byte_get ((unsigned char *) start, 4);
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b = byte_get ((unsigned char *) start + 4, 4);
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if (a == 0xffffffff)
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{
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if (b == 0xffffffff)
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{
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decode_64bit_range (offset, base_address);
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return;
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}
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base_address = b;
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}
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else if (a == 0 && b == 0)
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break;
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else if (a > b)
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printf (_("[corrupt: start > end]"));
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else
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{
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if (start > debug_range_contents + offset)
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printf (", ");
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printf (_("0x%lx - 0x%lx"),
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(unsigned long) base_address + a,
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(unsigned long) base_address + b);
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}
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start += 8;
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}
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while (start < end);
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printf (")");
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}
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/* This structure records the information that
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we extract from the.debug_info section. */
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typedef struct
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@ -8021,6 +7906,9 @@ typedef struct
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int *have_frame_base;
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unsigned int num_loc_offsets;
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unsigned int max_loc_offsets;
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unsigned long *range_lists;
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unsigned int num_range_lists;
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unsigned int max_range_lists;
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}
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debug_info;
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@ -8154,7 +8042,7 @@ read_and_display_attr_value (unsigned long attribute,
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printf (" %lx", uvalue);
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printf (" %lx", (unsigned long) byte_get (data + 4, 4));
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}
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if ((do_loc || do_debug_loc)
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if ((do_loc || do_debug_loc || do_debug_ranges)
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&& num_debug_info_entries == 0)
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{
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if (sizeof (uvalue) == 8)
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@ -8223,7 +8111,7 @@ read_and_display_attr_value (unsigned long attribute,
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}
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/* For some attributes we can display further information. */
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if ((do_loc || do_debug_loc)
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if ((do_loc || do_debug_loc || do_debug_ranges)
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&& num_debug_info_entries == 0)
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{
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switch (attribute)
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@ -8267,6 +8155,26 @@ read_and_display_attr_value (unsigned long attribute,
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debug_info_p->base_address = uvalue;
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break;
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case DW_AT_ranges:
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if (form == DW_FORM_data4 || form == DW_FORM_data8)
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{
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/* Process range list. */
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unsigned int max = debug_info_p->max_range_lists;
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unsigned int num = debug_info_p->num_range_lists;
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if (max == 0 || num >= max)
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{
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max += 1024;
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debug_info_p->range_lists
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= xrealloc (debug_info_p->range_lists,
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max * sizeof (*debug_info_p->range_lists));
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debug_info_p->max_range_lists = max;
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}
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debug_info_p->range_lists [num] = uvalue;
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debug_info_p->num_range_lists++;
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}
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break;
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default:
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break;
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}
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@ -8447,15 +8355,6 @@ read_and_display_attr_value (unsigned long attribute,
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break;
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case DW_AT_low_pc:
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if (need_base_address)
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saved_base_address = uvalue;
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break;
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case DW_AT_ranges:
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decode_range (uvalue, saved_base_address);
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break;
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default:
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break;
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}
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@ -8612,7 +8511,7 @@ process_debug_info (Elf_Internal_Shdr *section, unsigned char *start,
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unsigned int unit;
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unsigned int num_units = 0;
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if ((do_loc || do_debug_loc)
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if ((do_loc || do_debug_loc || do_debug_ranges)
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&& num_debug_info_entries == 0)
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{
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unsigned long length;
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@ -8708,7 +8607,7 @@ process_debug_info (Elf_Internal_Shdr *section, unsigned char *start,
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compunit.cu_pointer_size = byte_get (hdrptr, 1);
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hdrptr += 1;
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if ((do_loc || do_debug_loc)
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if ((do_loc || do_debug_loc || do_debug_ranges)
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&& num_debug_info_entries == 0)
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{
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debug_information [unit].cu_offset = cu_offset;
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@ -8719,6 +8618,9 @@ process_debug_info (Elf_Internal_Shdr *section, unsigned char *start,
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debug_information [unit].have_frame_base = NULL;
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debug_information [unit].max_loc_offsets = 0;
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debug_information [unit].num_loc_offsets = 0;
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debug_information [unit].range_lists = NULL;
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debug_information [unit].max_range_lists= 0;
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debug_information [unit].num_range_lists = 0;
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}
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tags = hdrptr;
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@ -8811,7 +8713,6 @@ process_debug_info (Elf_Internal_Shdr *section, unsigned char *start,
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break;
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case DW_TAG_compile_unit:
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need_base_address = 1;
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saved_base_address = 0;
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break;
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case DW_TAG_entry_point:
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case DW_TAG_inlined_subroutine:
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@ -8837,9 +8738,9 @@ process_debug_info (Elf_Internal_Shdr *section, unsigned char *start,
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}
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}
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/* Set num_debug_info_entries here so that it can be used
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to check if we need to proecess .debug_loc section. */
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if ((do_loc || do_debug_loc)
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/* Set num_debug_info_entries here so that it can be used to check if
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we need to proecess .debug_loc and .debug_ranges sections. */
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if ((do_loc || do_debug_loc || do_debug_ranges)
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&& num_debug_info_entries == 0)
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num_debug_info_entries = num_units;
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@ -9751,92 +9652,148 @@ display_debug_aranges (Elf_Internal_Shdr *section,
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return 1;
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}
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static int
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display_64bit_debug_ranges (unsigned char * start, unsigned char * end)
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{
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bfd_vma base_address = 0;
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while (start < end)
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{
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bfd_vma a, b;
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a = byte_get (start, 8);
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b = byte_get (start + 8, 8);
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if (a == 0xffffffffffffffffLL)
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{
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printf (_(" set base address to "));
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print_vma (b, PREFIX_HEX);
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base_address = b;
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}
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else if (a == 0 && b == 0)
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printf ( _("end of range"));
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else if (a > b)
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printf (_(" <corrupt range entry, start is greater than end>"));
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else if (base_address == 0)
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{
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printf ("range from base address + ");
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print_vma (a, PREFIX_HEX);
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printf (" to base address + ");
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print_vma (b, PREFIX_HEX);
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}
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else
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{
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printf ("range from ");
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print_vma (base_address + a, PREFIX_HEX);
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printf (" to ");
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print_vma (base_address + b, PREFIX_HEX);
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}
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start += 16;
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printf ("\n");
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}
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return 1;
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}
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static int
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display_debug_ranges (Elf_Internal_Shdr *section,
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unsigned char *start,
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FILE *file ATTRIBUTE_UNUSED)
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{
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unsigned long base_address = 0;
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unsigned char *end = start + section->sh_size;
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unsigned char *section_end;
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unsigned long bytes;
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unsigned char *section_begin = start;
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unsigned int num_range_list = 0;
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unsigned long last_offset = 0;
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unsigned int first = 0;
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unsigned int i;
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unsigned int j;
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int seen_first_offset = 0;
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int use_debug_info = 1;
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unsigned char *next;
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printf (_("The section %s contains:\n\n"), SECTION_NAME (section));
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bytes = section->sh_size;
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section_end = start + bytes;
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while (start < end)
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if (bytes == 0)
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{
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unsigned long a;
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unsigned long b;
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a = byte_get (start, 4);
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b = byte_get (start + 4, 4);
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if (a == 0xffffffff)
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{
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/* Attempt to handle 64-bit DWARF3 format. This assumes
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that in a 32-bit DWARF3 file the base address will
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never be 0xffffffff, and that the .debug_ranges section
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will never contain a mixture of 32-bit and 64-bit entries. */
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if (b == 0xffffffff)
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return display_64bit_debug_ranges (start, end);
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printf (_(" set base address to 0x%lx\n"), b);
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base_address = b;
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}
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else if (a == 0 && b == 0)
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printf (_(" end of range\n"));
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else if (a > b)
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printf (_(" <corrupt range entry, start is greater than end>\n"));
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else if (base_address == 0)
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printf (_(" range from base address + 0x%lx to base address + 0x%lx\n"), a, b);
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else
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printf (_(" range from 0x%lx to 0x%lx\n"), base_address + a, base_address + b);
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start += 8;
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printf (_("\nThe .debug_ranges section is empty.\n"));
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return 0;
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}
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get_debug_info (file);
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/* Check the order of range list in .debug_info section. If
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offsets of range lists are in the ascending order, we can
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use `debug_information' directly. */
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for (i = 0; i < num_debug_info_entries; i++)
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{
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unsigned int num;
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num = debug_information [i].num_range_lists;
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num_range_list += num;
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/* Check if we can use `debug_information' directly. */
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if (use_debug_info && num != 0)
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{
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if (!seen_first_offset)
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{
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/* This is the first range list. */
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last_offset = debug_information [i].range_lists [0];
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first = i;
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seen_first_offset = 1;
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j = 1;
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}
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else
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j = 0;
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for (; j < num; j++)
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{
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if (last_offset >
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debug_information [i].range_lists [j])
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{
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use_debug_info = 0;
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break;
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}
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last_offset = debug_information [i].range_lists [j];
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}
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}
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}
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if (!use_debug_info)
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/* FIXME: Should we handle this case? */
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error (_("Range lists in .debug_info section aren't in ascending order!\n"));
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if (!seen_first_offset)
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error (_("No range lists in .debug_info section!\n"));
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if (debug_information [first].range_lists [0] != 0)
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warn (_("Range lists in .debug_ranges section start at 0x%lx\n"),
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debug_information [first].range_lists [0]);
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printf (_("Contents of the .debug_ranges section:\n\n"));
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printf (_(" Offset Begin End\n"));
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seen_first_offset = 0;
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for (i = first; i < num_debug_info_entries; i++)
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{
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unsigned long begin;
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unsigned long end;
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unsigned long offset;
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unsigned int pointer_size;
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unsigned long base_address;
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pointer_size = debug_information [i].pointer_size;
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for (j = 0; j < debug_information [i].num_range_lists; j++)
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{
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offset = debug_information [i].range_lists [j];
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next = section_begin + offset;
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base_address = debug_information [i].base_address;
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if (!seen_first_offset)
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seen_first_offset = 1;
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else
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{
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if (start < next)
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warn (_("There is a hole [0x%lx - 0x%lx] in .debug_ranges section.\n"),
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start - section_begin, next - section_begin);
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else if (start > next)
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warn (_("There is an overlap [0x%lx - 0x%lx] in .debug_ranges section.\n"),
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start - section_begin, next - section_begin);
|
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}
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start = next;
|
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|
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while (1)
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{
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begin = byte_get (start, pointer_size);
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start += pointer_size;
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end = byte_get (start, pointer_size);
|
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start += pointer_size;
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if (begin == 0 && end == 0)
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break;
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/* Check base address specifiers. */
|
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if (begin == -1UL && end != -1UL)
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{
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base_address = end;
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printf (" %8.8lx %8.8lx %8.8lx (base address)\n",
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offset, begin, end);
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continue;
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}
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printf (" %8.8lx %8.8lx %8.8lx",
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offset, begin + base_address, end + base_address);
|
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|
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if (begin == end)
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fputs (_(" (start == end)"), stdout);
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else if (begin > end)
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fputs (_(" (start > end)"), stdout);
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putchar ('\n');
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}
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fputs (_(" <End of list>\n"), stdout);
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}
|
||||
}
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putchar ('\n');
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return 1;
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||||
}
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|
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@ -11804,11 +11761,15 @@ process_object (char *file_name, FILE *file)
|
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if (debug_information)
|
||||
{
|
||||
for (i = 0; i < num_debug_info_entries; i++)
|
||||
if (!debug_information [i].max_loc_offsets)
|
||||
{
|
||||
free (debug_information [i].loc_offsets);
|
||||
free (debug_information [i].have_frame_base);
|
||||
}
|
||||
{
|
||||
if (!debug_information [i].max_loc_offsets)
|
||||
{
|
||||
free (debug_information [i].loc_offsets);
|
||||
free (debug_information [i].have_frame_base);
|
||||
}
|
||||
if (!debug_information [i].max_range_lists)
|
||||
free (debug_information [i].range_lists);
|
||||
}
|
||||
free (debug_information);
|
||||
debug_information = NULL;
|
||||
num_debug_info_entries = 0;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user