* readelf.c (usage): Add -wf (--debug-dump=frames) option.
(parse_args): Support -wf option. (process_section_headers): Ditto. (debug_displays): Ditto. (display_debug_frames): New, dump *_frame sections. (frame_need_space): Support for above. (frame_display_row): Ditto. * binutils.texi: Document it.
This commit is contained in:
DJ Delorie
parent
4e73b9c108
commit
c47d488e51
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@ -1,3 +1,14 @@
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2000-11-27 DJ Delorie <dj@redhat.com>
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* readelf.c (usage): Add -wf (--debug-dump=frames) option.
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(parse_args): Support -wf option.
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(process_section_headers): Ditto.
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(debug_displays): Ditto.
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(display_debug_frames): New, dump *_frame sections.
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(frame_need_space): Support for above.
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(frame_display_row): Ditto.
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* binutils.texi: Document it.
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2000-11-24 Nick Clifton <nickc@redhat.com>
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* NEWS: Announce support for v5t, v5te and XScale.
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@ -2478,7 +2478,7 @@ readelf [ -a | --all ]
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[ -V | --version-info]
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[ -D | --use-dynamic]
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[ -x <number> | --hex-dump=<number>]
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[ -w[liapr] | --debug-dump[=info,=line,=abbrev,=pubnames,=ranges]]
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[ -w[liaprf] | --debug-dump[=info,=line,=abbrev,=pubnames,=ranges,=frames]]
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[ --histogram]
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[ -v | --version]
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[ -H | --help]
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@ -2566,8 +2566,8 @@ symbols section.
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@itemx --hex-dump=<number>
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Displays the contents of the indicated section as a hexadecimal dump.
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@item -w[liapr]
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@itemx --debug-dump[=line,=info,=abbrev,=pubnames,=ranges]
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@item -w[liaprf]
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@itemx --debug-dump[=line,=info,=abbrev,=pubnames,=ranges,=frames]
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Displays the contents of the debug sections in the file, if any are
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present. If one of the optional letters or words follows the switch
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then only data found in those specific sections will be dumped.
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@ -113,6 +113,7 @@ int do_debug_abbrevs;
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int do_debug_lines;
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int do_debug_pubnames;
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int do_debug_aranges;
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int do_debug_frames;
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int do_arch;
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int do_notes;
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int is_32bit_elf;
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@ -197,6 +198,7 @@ static int display_debug_not_supported PARAMS ((Elf32_Internal_Sh
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static int display_debug_lines PARAMS ((Elf32_Internal_Shdr *, unsigned char *, FILE *));
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static int display_debug_abbrev PARAMS ((Elf32_Internal_Shdr *, unsigned char *, FILE *));
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static int display_debug_aranges PARAMS ((Elf32_Internal_Shdr *, unsigned char *, FILE *));
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static int display_debug_frames PARAMS ((Elf32_Internal_Shdr *, unsigned char *, FILE *));
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static unsigned char * process_abbrev_section PARAMS ((unsigned char *, unsigned char *));
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static unsigned long read_leb128 PARAMS ((unsigned char *, int *, int));
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static int process_extended_line_op PARAMS ((unsigned char *, int, int));
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@ -1844,7 +1846,7 @@ usage ()
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fprintf (stdout, _(" -D or --use-dynamic Use the dynamic section info when displaying symbols\n"));
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fprintf (stdout, _(" -x <number> or --hex-dump=<number>\n"));
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fprintf (stdout, _(" Dump the contents of section <number>\n"));
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fprintf (stdout, _(" -w[liapr] or --debug-dump[=line,=info,=abbrev,=pubnames,=ranges]\n"));
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fprintf (stdout, _(" -w[liaprf] or --debug-dump[=line,=info,=abbrev,=pubnames,=ranges,=frames]\n"));
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fprintf (stdout, _(" Display the contents of DWARF2 debug sections\n"));
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#ifdef SUPPORT_DISASSEMBLY
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fprintf (stdout, _(" -i <number> or --instruction-dump=<number>\n"));
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@ -2004,6 +2006,11 @@ parse_args (argc, argv)
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do_debug_aranges = 1;
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break;
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case 'f':
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case 'F':
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do_debug_frames = 1;
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break;
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default:
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warn (_("Unrecognised debug option '%s'\n"), optarg);
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break;
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@ -2732,7 +2739,7 @@ process_section_headers (file)
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dynamic_strings, char *, "dynamic strings");
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}
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else if ((do_debugging || do_debug_info || do_debug_abbrevs
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|| do_debug_lines || do_debug_pubnames || do_debug_aranges)
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|| do_debug_lines || do_debug_pubnames || do_debug_aranges || do_debug_frames)
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&& strncmp (name, ".debug_", 7) == 0)
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{
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name += 7;
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@ -2743,9 +2750,12 @@ process_section_headers (file)
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|| (do_debug_lines && (strcmp (name, "line") == 0))
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|| (do_debug_pubnames && (strcmp (name, "pubnames") == 0))
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|| (do_debug_aranges && (strcmp (name, "aranges") == 0))
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|| (do_debug_frames && (strcmp (name, "frame") == 0))
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)
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request_dump (i, DEBUG_DUMP);
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}
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else if (do_debug_frames && strcmp (name, ".eh_frame") == 0)
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request_dump (i, DEBUG_DUMP);
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}
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if (! do_sections)
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@ -6471,6 +6481,479 @@ display_debug_aranges (section, start, file)
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return 1;
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}
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typedef struct Frame_Chunk
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{
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struct Frame_Chunk *next;
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unsigned char *chunk_start;
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int ncols;
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/* DW_CFA_{undefined,same_value,offset,register} */
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unsigned char *col_type;
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int *col_offset;
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char *augmentation;
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unsigned int code_factor;
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unsigned int data_factor;
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unsigned long pc_begin;
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unsigned long pc_range;
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int cfa_reg;
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int cfa_offset
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int ra;
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}
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Frame_Chunk;
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static void
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frame_need_space (fc, reg)
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Frame_Chunk *fc;
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int reg;
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{
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int prev = fc->ncols;
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if (reg < fc->ncols)
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return;
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fc->ncols = reg + 1;
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fc->col_type = (unsigned char *) xrealloc (fc->col_type,
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fc->ncols * sizeof (unsigned char));
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fc->col_offset = (int *) xrealloc (fc->col_offset,
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fc->ncols * sizeof (int));
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while (prev < fc->ncols)
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{
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fc->col_type[prev] = DW_CFA_undefined;
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fc->col_offset[prev] = 0;
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prev++;
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}
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}
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static void
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frame_display_row (fc, need_col_headers, max_regs)
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Frame_Chunk *fc;
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int *need_col_headers;
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int *max_regs;
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{
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int r;
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char tmp[100];
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if (*max_regs < fc->ncols)
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*max_regs = fc->ncols;
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if (*need_col_headers)
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{
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*need_col_headers = 0;
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printf (" LOC CFA ");
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for (r=0; r<*max_regs; r++)
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if (r == fc->ra)
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printf ("ra ");
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else
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printf ("r%-4d", r);
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printf ("\n");
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}
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printf ("%08x ", (unsigned int) fc->pc_begin);
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sprintf (tmp, "r%d%+d", fc->cfa_reg, fc->cfa_offset);
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printf ("%-8s ", tmp);
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for (r=0; r<fc->ncols; r++)
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{
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switch (fc->col_type[r])
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{
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case DW_CFA_undefined:
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strcpy (tmp, "u");
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break;
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case DW_CFA_same_value:
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strcpy (tmp, "u");
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break;
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case DW_CFA_offset:
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sprintf (tmp, "c%+d", fc->col_offset[r]);
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break;
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case DW_CFA_register:
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sprintf (tmp, "r%d", fc->col_offset[r]);
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break;
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default:
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strcpy (tmp, "n/a");
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break;
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}
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printf ("%-5s", tmp);
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}
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printf ("\n");
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}
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#define GET(N) byte_get (start, N); start += N
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#define LEB() read_leb128 (start, &length_return, 0); start += length_return
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#define SLEB() read_leb128 (start, &length_return, 1); start += length_return
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static int
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display_debug_frames (section, start, file)
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Elf32_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 char * end = start + section->sh_size;
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unsigned char *section_start = start;
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Frame_Chunk *chunks = 0;
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Frame_Chunk *remembered_state = 0, *rs;
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int is_eh = (strcmp (SECTION_NAME (section), ".eh_frame") == 0);
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int length_return;
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int max_regs = 0;
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printf (_("The section %s contains:\n"), SECTION_NAME (section));
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while (start < end)
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{
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unsigned char *saved_start, *block_end;
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unsigned long length, cie_id;
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Frame_Chunk *fc, *cie;
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int need_col_headers = 1;
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saved_start = start;
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length = byte_get (start, 4); start += 4;
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if (length == 0)
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return 1;
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block_end = saved_start + length + 4;
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cie_id = byte_get (start, 4); start += 4;
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printf ("\n%08x %08lx %08lx ", saved_start - section_start, length, cie_id);
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if (is_eh ? (cie_id == 0) : (cie_id == DW_CIE_ID))
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{
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fc = (Frame_Chunk *) xmalloc (sizeof (Frame_Chunk));
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memset (fc, 0, sizeof (Frame_Chunk));
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fc->next = chunks;
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chunks = fc;
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fc->chunk_start = saved_start;
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fc->ncols = 0;
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fc->col_type = (unsigned char *) xmalloc (sizeof (unsigned char));
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fc->col_offset = (int *) xmalloc (sizeof (int));
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frame_need_space (fc, max_regs-1);
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start ++; /* version */
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fc->augmentation = start;
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while (*start) start++; start++; /* skip past NUL */
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if (fc->augmentation[0] == 'z')
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{
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int xtra;
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fc->code_factor = LEB ();
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fc->data_factor = SLEB ();
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fc->ra = byte_get (start, 1); start += 1;
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xtra = LEB ();
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printf ("skipping %d extra bytes\n", xtra);
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start += xtra;
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}
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else if (strcmp (fc->augmentation, "eh") == 0)
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{
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start += 4;
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fc->code_factor = LEB ();
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fc->data_factor = SLEB ();
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fc->ra = byte_get (start, 1); start += 1;
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}
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else
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{
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fc->code_factor = LEB ();
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fc->data_factor = SLEB ();
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fc->ra = byte_get (start, 1); start += 1;
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}
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cie = fc;
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printf ("CIE \"%s\" cf=%d df=%d ra=%d\n",
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fc->augmentation, fc->code_factor, fc->data_factor, fc->ra);
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frame_need_space (fc, fc->ra);
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}
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else
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{
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unsigned char *look_for;
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static Frame_Chunk fde_fc;
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fc = &fde_fc;
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memset (fc, 0, sizeof (Frame_Chunk));
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look_for = is_eh ? start-4-cie_id : (unsigned char *) cie_id;
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fc->pc_begin = byte_get (start, 4); start += 4;
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fc->pc_range = byte_get (start, 4); start += 4;
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for (cie=chunks; cie && (cie->chunk_start != look_for); cie = cie->next);
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if (!cie)
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{
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warn ("Invalid CIE pointer %08x in FDE at %08x\n", cie_id, saved_start);
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start = block_end;
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fc->ncols = 0;
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fc->col_type = (unsigned char *) xmalloc (sizeof (unsigned char));
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fc->col_offset = (int *) xmalloc (sizeof (int));
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frame_need_space (fc, max_regs-1);
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cie = fc;
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fc->augmentation = "";
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}
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else
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{
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fc->ncols = cie->ncols;
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fc->col_type = (unsigned char *) xmalloc (fc->ncols * sizeof (unsigned char));
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fc->col_offset = (int *) xmalloc (fc->ncols * sizeof (int));
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memcpy (fc->col_type, cie->col_type, fc->ncols);
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memcpy (fc->col_offset, cie->col_offset, fc->ncols * sizeof (int));
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fc->augmentation = cie->augmentation;
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fc->code_factor = cie->code_factor;
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fc->data_factor = cie->data_factor;
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fc->cfa_reg = cie->cfa_reg;
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fc->cfa_offset = cie->cfa_offset;
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fc->ra = cie->ra;
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frame_need_space (fc, max_regs-1);
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}
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if (cie->augmentation[0] == 'z')
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{
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unsigned long l = LEB ();
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start += l;
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}
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printf ("FDE cie=%08x pc=%08lx..%08lx\n",
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cie->chunk_start-section_start, fc->pc_begin,
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fc->pc_begin + fc->pc_range);
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}
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/* At this point, fc is the current chunk, cie (if any) is set, and we're
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about to interpret instructions for the chunk. */
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/* This exists for readelf maintainers. */
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#define FDEBUG 0
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while (start < block_end)
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{
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unsigned op, opa;
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unsigned long ul, reg, roffs;
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long l, ofs;
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bfd_vma vma;
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op = * start ++;
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opa = op & 0x3f;
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if (op & 0xc0)
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op &= 0xc0;
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switch (op)
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{
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case DW_CFA_advance_loc:
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frame_display_row (fc, &need_col_headers, &max_regs);
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#if FDEBUG
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printf (" DW_CFA_advance_loc: %08x = %08x + %d*%d\n",
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fc->pc_begin + opa * fc->code_factor, fc->pc_begin, opa, fc->code_factor);
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#endif
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fc->pc_begin += opa * fc->code_factor;
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||||
break;
|
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case DW_CFA_offset:
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frame_need_space (fc, opa);
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roffs = LEB ();
|
||||
#if FDEBUG
|
||||
printf (" DW_CFA_offset: r%d = cfa[%d*%d]\n", opa, roffs, fc->data_factor);
|
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#endif
|
||||
fc->col_type[opa] = DW_CFA_offset;
|
||||
fc->col_offset[opa] = roffs * fc->data_factor;
|
||||
break;
|
||||
|
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case DW_CFA_restore:
|
||||
frame_need_space (fc, opa);
|
||||
#if FDEBUG
|
||||
printf (" DW_CFA_restore: r%d\n", opa);
|
||||
#endif
|
||||
fc->col_type[opa] = cie->col_type[opa];
|
||||
fc->col_offset[opa] = cie->col_offset[opa];
|
||||
break;
|
||||
|
||||
case DW_CFA_set_loc:
|
||||
frame_display_row (fc, &need_col_headers, &max_regs);
|
||||
vma = byte_get (start, sizeof (vma)); start += sizeof (vma);
|
||||
#if FDEBUG
|
||||
printf (" DW_CFA_set_loc: %08x\n", vma);
|
||||
#endif
|
||||
fc->pc_begin = vma;
|
||||
break;
|
||||
|
||||
case DW_CFA_advance_loc1:
|
||||
frame_display_row (fc, &need_col_headers, &max_regs);
|
||||
ofs = byte_get (start, 1); start += 1;
|
||||
#if FDEBUG
|
||||
printf (" DW_CFA_advance_loc1: %08x = %08x + %d*%d\n",
|
||||
fc->pc_begin + ofs * fc->code_factor, fc->pc_begin, ofs, fc->code_factor);
|
||||
#endif
|
||||
fc->pc_begin += ofs * fc->code_factor;
|
||||
break;
|
||||
|
||||
case DW_CFA_advance_loc2:
|
||||
frame_display_row (fc, &need_col_headers, &max_regs);
|
||||
ofs = byte_get (start, 2); start += 2;
|
||||
#if FDEBUG
|
||||
printf (" DW_CFA_advance_loc2: %08x = %08x + %d*%d\n",
|
||||
fc->pc_begin + ofs * fc->code_factor, fc->pc_begin, ofs, fc->code_factor);
|
||||
#endif
|
||||
fc->pc_begin += ofs * fc->code_factor;
|
||||
break;
|
||||
|
||||
case DW_CFA_advance_loc4:
|
||||
frame_display_row (fc, &need_col_headers, &max_regs);
|
||||
ofs = byte_get (start, 4); start += 4;
|
||||
#if FDEBUG
|
||||
printf (" DW_CFA_advance_loc4: %08x = %08x + %d*%d\n",
|
||||
fc->pc_begin + ofs * fc->code_factor, fc->pc_begin, ofs, fc->code_factor);
|
||||
#endif
|
||||
fc->pc_begin += ofs * fc->code_factor;
|
||||
break;
|
||||
|
||||
case DW_CFA_offset_extended:
|
||||
reg = LEB ();
|
||||
roffs = LEB ();
|
||||
frame_need_space (fc, reg);
|
||||
#if FDEBUG
|
||||
printf (" DW_CFA_offset_extended: r%d = cfa[%d*%d]\n", reg, roffs, fc->data_factor);
|
||||
#endif
|
||||
fc->col_type[reg] = DW_CFA_offset;
|
||||
fc->col_offset[reg] = roffs * fc->data_factor;
|
||||
break;
|
||||
|
||||
case DW_CFA_restore_extended:
|
||||
reg = LEB ();
|
||||
frame_need_space (fc, reg);
|
||||
#if FDEBUG
|
||||
printf (" DW_CFA_restore_extended: r%d\n", reg);
|
||||
#endif
|
||||
fc->col_type[reg] = cie->col_type[reg];
|
||||
fc->col_offset[reg] = cie->col_offset[reg];
|
||||
break;
|
||||
|
||||
case DW_CFA_undefined:
|
||||
reg = LEB ();
|
||||
frame_need_space (fc, reg);
|
||||
#if FDEBUG
|
||||
printf (" DW_CFA_undefined: r%d\n", reg);
|
||||
#endif
|
||||
fc->col_type[reg] = DW_CFA_undefined;
|
||||
fc->col_offset[reg] = 0;
|
||||
break;
|
||||
|
||||
case DW_CFA_same_value:
|
||||
reg = LEB ();
|
||||
frame_need_space (fc, reg);
|
||||
#if FDEBUG
|
||||
printf (" DW_CFA_same_value: r%d\n", reg);
|
||||
#endif
|
||||
fc->col_type[reg] = DW_CFA_same_value;
|
||||
fc->col_offset[reg] = 0;
|
||||
break;
|
||||
|
||||
case DW_CFA_register:
|
||||
reg = LEB ();
|
||||
roffs = LEB ();
|
||||
frame_need_space (fc, reg);
|
||||
#if FDEBUG
|
||||
printf (" DW_CFA_ame_value: r%d\n", reg);
|
||||
#endif
|
||||
fc->col_type[reg] = DW_CFA_register;
|
||||
fc->col_offset[reg] = roffs;
|
||||
break;
|
||||
|
||||
case DW_CFA_remember_state:
|
||||
#if FDEBUG
|
||||
printf (" DW_CFA_remember_state\n");
|
||||
#endif
|
||||
rs = (Frame_Chunk *) xmalloc (sizeof (Frame_Chunk));
|
||||
rs->ncols = fc->ncols;
|
||||
rs->col_type = (unsigned char *) xmalloc (rs->ncols);
|
||||
rs->col_offset = (int *) xmalloc (rs->ncols * sizeof (int));
|
||||
memcpy (rs->col_type, fc->col_type, rs->ncols);
|
||||
memcpy (rs->col_offset, fc->col_offset, rs->ncols * sizeof (int));
|
||||
rs->next = remembered_state;
|
||||
remembered_state = rs;
|
||||
break;
|
||||
|
||||
case DW_CFA_restore_state:
|
||||
#if FDEBUG
|
||||
printf (" DW_CFA_restore_state\n");
|
||||
#endif
|
||||
rs = remembered_state;
|
||||
remembered_state = rs->next;
|
||||
frame_need_space (fc, rs->ncols-1);
|
||||
memcpy (fc->col_type, rs->col_type, rs->ncols);
|
||||
memcpy (fc->col_offset, rs->col_offset, rs->ncols * sizeof (int));
|
||||
free (rs->col_type);
|
||||
free (rs->col_offset);
|
||||
free (rs);
|
||||
break;
|
||||
|
||||
case DW_CFA_def_cfa:
|
||||
fc->cfa_reg = LEB ();
|
||||
fc->cfa_offset = LEB ();
|
||||
#if FDEBUG
|
||||
printf (" DW_CFA_def_cfa: reg %d ofs %d\n", fc->cfa_reg, fc->cfa_offset);
|
||||
#endif
|
||||
break;
|
||||
|
||||
case DW_CFA_def_cfa_register:
|
||||
fc->cfa_reg = LEB ();
|
||||
#if FDEBUG
|
||||
printf (" DW_CFA_def_cfa_reg: %d\n", fc->cfa_reg);
|
||||
#endif
|
||||
break;
|
||||
|
||||
case DW_CFA_def_cfa_offset:
|
||||
fc->cfa_offset = LEB ();
|
||||
#if FDEBUG
|
||||
printf (" DW_CFA_def_cfa_offset: %d\n", fc->cfa_offset);
|
||||
#endif
|
||||
break;
|
||||
|
||||
case DW_CFA_nop:
|
||||
#if FDEBUG
|
||||
printf (" DW_CFA_nop\n");
|
||||
#endif
|
||||
break;
|
||||
|
||||
#ifndef DW_CFA_GNU_window_save
|
||||
#define DW_CFA_GNU_window_save 0x2d
|
||||
#endif
|
||||
case DW_CFA_GNU_window_save:
|
||||
#if FDEBUG
|
||||
printf (" DW_CFA_GNU_window_save\n");
|
||||
#endif
|
||||
break;
|
||||
|
||||
#ifndef DW_CFA_GNU_args_size
|
||||
#define DW_CFA_GNU_args_size 0x2e
|
||||
#endif
|
||||
case DW_CFA_GNU_args_size:
|
||||
ul = LEB ();
|
||||
#if FDEBUG
|
||||
printf (" DW_CFA_GNU_args_size: %d\n", ul);
|
||||
#endif
|
||||
break;
|
||||
|
||||
#ifndef DW_CFA_GNU_negative_offset_extended
|
||||
#define DW_CFA_GNU_negative_offset_extended 0x2f
|
||||
#endif
|
||||
case DW_CFA_GNU_negative_offset_extended:
|
||||
reg = LEB ();
|
||||
l = - LEB ();
|
||||
frame_need_space (fc, reg);
|
||||
#if FDEBUG
|
||||
printf (" DW_CFA_GNU_negative_offset_extended: r%d = cfa[%d*%d]\n", reg, l, fc->data_factor);
|
||||
#endif
|
||||
fc->col_type[reg] = DW_CFA_offset;
|
||||
fc->col_offset[reg] = l * fc->data_factor;
|
||||
break;
|
||||
|
||||
default:
|
||||
fprintf (stderr, "unsupported or unknown DW_CFA_%d\n", op);
|
||||
start = block_end;
|
||||
}
|
||||
}
|
||||
|
||||
frame_display_row (fc, &need_col_headers, &max_regs);
|
||||
|
||||
start = block_end;
|
||||
}
|
||||
|
||||
printf ("\n");
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
#undef GET
|
||||
#undef LEB
|
||||
#undef SLEB
|
||||
|
||||
static int
|
||||
display_debug_not_supported (section, start, file)
|
||||
|
|
@ -6518,6 +7001,8 @@ debug_displays[] =
|
|||
{ ".debug_line", display_debug_lines, NULL },
|
||||
{ ".debug_aranges", display_debug_aranges, NULL },
|
||||
{ ".debug_pubnames", display_debug_pubnames, NULL },
|
||||
{ ".debug_frame", display_debug_frames, NULL },
|
||||
{ ".eh_frame", display_debug_frames, NULL },
|
||||
{ ".debug_macinfo", display_debug_not_supported, NULL },
|
||||
{ ".debug_frame", display_debug_not_supported, NULL },
|
||||
{ ".debug_str", display_debug_not_supported, NULL },
|
||||
|
|
|
|||
Loading…
Reference in New Issue