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Diffstat (limited to 'binutils/readelf.c')
-rw-r--r--binutils/readelf.c489
1 files changed, 487 insertions, 2 deletions
diff --git a/binutils/readelf.c b/binutils/readelf.c
index 1e9c156..a689e98 100644
--- a/binutils/readelf.c
+++ b/binutils/readelf.c
@@ -113,6 +113,7 @@ int do_debug_abbrevs;
int do_debug_lines;
int do_debug_pubnames;
int do_debug_aranges;
+int do_debug_frames;
int do_arch;
int do_notes;
int is_32bit_elf;
@@ -197,6 +198,7 @@ static int display_debug_not_supported PARAMS ((Elf32_Internal_Sh
static int display_debug_lines PARAMS ((Elf32_Internal_Shdr *, unsigned char *, FILE *));
static int display_debug_abbrev PARAMS ((Elf32_Internal_Shdr *, unsigned char *, FILE *));
static int display_debug_aranges PARAMS ((Elf32_Internal_Shdr *, unsigned char *, FILE *));
+static int display_debug_frames PARAMS ((Elf32_Internal_Shdr *, unsigned char *, FILE *));
static unsigned char * process_abbrev_section PARAMS ((unsigned char *, unsigned char *));
static unsigned long read_leb128 PARAMS ((unsigned char *, int *, int));
static int process_extended_line_op PARAMS ((unsigned char *, int, int));
@@ -1844,7 +1846,7 @@ usage ()
fprintf (stdout, _(" -D or --use-dynamic Use the dynamic section info when displaying symbols\n"));
fprintf (stdout, _(" -x <number> or --hex-dump=<number>\n"));
fprintf (stdout, _(" Dump the contents of section <number>\n"));
- fprintf (stdout, _(" -w[liapr] or --debug-dump[=line,=info,=abbrev,=pubnames,=ranges]\n"));
+ fprintf (stdout, _(" -w[liaprf] or --debug-dump[=line,=info,=abbrev,=pubnames,=ranges,=frames]\n"));
fprintf (stdout, _(" Display the contents of DWARF2 debug sections\n"));
#ifdef SUPPORT_DISASSEMBLY
fprintf (stdout, _(" -i <number> or --instruction-dump=<number>\n"));
@@ -2004,6 +2006,11 @@ parse_args (argc, argv)
do_debug_aranges = 1;
break;
+ case 'f':
+ case 'F':
+ do_debug_frames = 1;
+ break;
+
default:
warn (_("Unrecognised debug option '%s'\n"), optarg);
break;
@@ -2732,7 +2739,7 @@ process_section_headers (file)
dynamic_strings, char *, "dynamic strings");
}
else if ((do_debugging || do_debug_info || do_debug_abbrevs
- || do_debug_lines || do_debug_pubnames || do_debug_aranges)
+ || do_debug_lines || do_debug_pubnames || do_debug_aranges || do_debug_frames)
&& strncmp (name, ".debug_", 7) == 0)
{
name += 7;
@@ -2743,9 +2750,12 @@ process_section_headers (file)
|| (do_debug_lines && (strcmp (name, "line") == 0))
|| (do_debug_pubnames && (strcmp (name, "pubnames") == 0))
|| (do_debug_aranges && (strcmp (name, "aranges") == 0))
+ || (do_debug_frames && (strcmp (name, "frame") == 0))
)
request_dump (i, DEBUG_DUMP);
}
+ else if (do_debug_frames && strcmp (name, ".eh_frame") == 0)
+ request_dump (i, DEBUG_DUMP);
}
if (! do_sections)
@@ -6471,6 +6481,479 @@ display_debug_aranges (section, start, file)
return 1;
}
+typedef struct Frame_Chunk
+{
+ struct Frame_Chunk *next;
+ unsigned char *chunk_start;
+ int ncols;
+ /* DW_CFA_{undefined,same_value,offset,register} */
+ unsigned char *col_type;
+ int *col_offset;
+ char *augmentation;
+ unsigned int code_factor;
+ unsigned int data_factor;
+ unsigned long pc_begin;
+ unsigned long pc_range;
+ int cfa_reg;
+ int cfa_offset
+ int ra;
+}
+Frame_Chunk;
+
+static void
+frame_need_space (fc, reg)
+ Frame_Chunk *fc;
+ int reg;
+{
+ int prev = fc->ncols;
+
+ if (reg < fc->ncols)
+ return;
+ fc->ncols = reg + 1;
+ fc->col_type = (unsigned char *) xrealloc (fc->col_type,
+ fc->ncols * sizeof (unsigned char));
+ fc->col_offset = (int *) xrealloc (fc->col_offset,
+ fc->ncols * sizeof (int));
+
+ while (prev < fc->ncols)
+ {
+ fc->col_type[prev] = DW_CFA_undefined;
+ fc->col_offset[prev] = 0;
+ prev++;
+ }
+}
+
+static void
+frame_display_row (fc, need_col_headers, max_regs)
+ Frame_Chunk *fc;
+ int *need_col_headers;
+ int *max_regs;
+{
+ int r;
+ char tmp[100];
+
+ if (*max_regs < fc->ncols)
+ *max_regs = fc->ncols;
+ if (*need_col_headers)
+ {
+ *need_col_headers = 0;
+ printf (" LOC CFA ");
+ for (r=0; r<*max_regs; r++)
+ if (r == fc->ra)
+ printf ("ra ");
+ else
+ printf ("r%-4d", r);
+ printf ("\n");
+ }
+ printf ("%08x ", (unsigned int) fc->pc_begin);
+ sprintf (tmp, "r%d%+d", fc->cfa_reg, fc->cfa_offset);
+ printf ("%-8s ", tmp);
+ for (r=0; r<fc->ncols; r++)
+ {
+ switch (fc->col_type[r])
+ {
+ case DW_CFA_undefined:
+ strcpy (tmp, "u");
+ break;
+ case DW_CFA_same_value:
+ strcpy (tmp, "u");
+ break;
+ case DW_CFA_offset:
+ sprintf (tmp, "c%+d", fc->col_offset[r]);
+ break;
+ case DW_CFA_register:
+ sprintf (tmp, "r%d", fc->col_offset[r]);
+ break;
+ default:
+ strcpy (tmp, "n/a");
+ break;
+ }
+ printf ("%-5s", tmp);
+ }
+ printf ("\n");
+}
+
+#define GET(N) byte_get (start, N); start += N
+#define LEB() read_leb128 (start, &length_return, 0); start += length_return
+#define SLEB() read_leb128 (start, &length_return, 1); start += length_return
+
+static int
+display_debug_frames (section, start, file)
+ Elf32_Internal_Shdr * section;
+ unsigned char * start;
+ FILE * file ATTRIBUTE_UNUSED;
+{
+ unsigned char * end = start + section->sh_size;
+ unsigned char *section_start = start;
+ Frame_Chunk *chunks = 0;
+ Frame_Chunk *remembered_state = 0, *rs;
+ int is_eh = (strcmp (SECTION_NAME (section), ".eh_frame") == 0);
+ int length_return;
+ int max_regs = 0;
+
+ printf (_("The section %s contains:\n"), SECTION_NAME (section));
+
+ while (start < end)
+ {
+ unsigned char *saved_start, *block_end;
+ unsigned long length, cie_id;
+ Frame_Chunk *fc, *cie;
+ int need_col_headers = 1;
+
+ saved_start = start;
+ length = byte_get (start, 4); start += 4;
+
+ if (length == 0)
+ return 1;
+
+ block_end = saved_start + length + 4;
+ cie_id = byte_get (start, 4); start += 4;
+
+ printf ("\n%08x %08lx %08lx ", saved_start - section_start, length, cie_id);
+
+ if (is_eh ? (cie_id == 0) : (cie_id == DW_CIE_ID))
+ {
+ fc = (Frame_Chunk *) xmalloc (sizeof (Frame_Chunk));
+ memset (fc, 0, sizeof (Frame_Chunk));
+
+ fc->next = chunks;
+ chunks = fc;
+ fc->chunk_start = saved_start;
+ fc->ncols = 0;
+ fc->col_type = (unsigned char *) xmalloc (sizeof (unsigned char));
+ fc->col_offset = (int *) xmalloc (sizeof (int));
+ frame_need_space (fc, max_regs-1);
+
+ start ++; /* version */
+ fc->augmentation = start;
+ while (*start) start++; start++; /* skip past NUL */
+ if (fc->augmentation[0] == 'z')
+ {
+ int xtra;
+ fc->code_factor = LEB ();
+ fc->data_factor = SLEB ();
+ fc->ra = byte_get (start, 1); start += 1;
+ xtra = LEB ();
+ printf ("skipping %d extra bytes\n", xtra);
+ start += xtra;
+ }
+ else if (strcmp (fc->augmentation, "eh") == 0)
+ {
+ start += 4;
+ fc->code_factor = LEB ();
+ fc->data_factor = SLEB ();
+ fc->ra = byte_get (start, 1); start += 1;
+ }
+ else
+ {
+ fc->code_factor = LEB ();
+ fc->data_factor = SLEB ();
+ fc->ra = byte_get (start, 1); start += 1;
+ }
+ cie = fc;
+ printf ("CIE \"%s\" cf=%d df=%d ra=%d\n",
+ fc->augmentation, fc->code_factor, fc->data_factor, fc->ra);
+
+ frame_need_space (fc, fc->ra);
+ }
+ else
+ {
+ unsigned char *look_for;
+ static Frame_Chunk fde_fc;
+ fc = &fde_fc;
+ memset (fc, 0, sizeof (Frame_Chunk));
+
+ look_for = is_eh ? start-4-cie_id : (unsigned char *) cie_id;
+
+ fc->pc_begin = byte_get (start, 4); start += 4;
+ fc->pc_range = byte_get (start, 4); start += 4;
+
+ for (cie=chunks; cie && (cie->chunk_start != look_for); cie = cie->next);
+ if (!cie)
+ {
+ warn ("Invalid CIE pointer %08x in FDE at %08x\n", cie_id, saved_start);
+ start = block_end;
+ fc->ncols = 0;
+ fc->col_type = (unsigned char *) xmalloc (sizeof (unsigned char));
+ fc->col_offset = (int *) xmalloc (sizeof (int));
+ frame_need_space (fc, max_regs-1);
+ cie = fc;
+ fc->augmentation = "";
+ }
+ else
+ {
+ fc->ncols = cie->ncols;
+ fc->col_type = (unsigned char *) xmalloc (fc->ncols * sizeof (unsigned char));
+ fc->col_offset = (int *) xmalloc (fc->ncols * sizeof (int));
+ memcpy (fc->col_type, cie->col_type, fc->ncols);
+ memcpy (fc->col_offset, cie->col_offset, fc->ncols * sizeof (int));
+ fc->augmentation = cie->augmentation;
+ fc->code_factor = cie->code_factor;
+ fc->data_factor = cie->data_factor;
+ fc->cfa_reg = cie->cfa_reg;
+ fc->cfa_offset = cie->cfa_offset;
+ fc->ra = cie->ra;
+ frame_need_space (fc, max_regs-1);
+ }
+
+ if (cie->augmentation[0] == 'z')
+ {
+ unsigned long l = LEB ();
+ start += l;
+ }
+
+ printf ("FDE cie=%08x pc=%08lx..%08lx\n",
+ cie->chunk_start-section_start, fc->pc_begin,
+ fc->pc_begin + fc->pc_range);
+ }
+
+ /* At this point, fc is the current chunk, cie (if any) is set, and we're
+ about to interpret instructions for the chunk. */
+
+ /* This exists for readelf maintainers. */
+#define FDEBUG 0
+
+ while (start < block_end)
+ {
+ unsigned op, opa;
+ unsigned long ul, reg, roffs;
+ long l, ofs;
+ bfd_vma vma;
+
+ op = * start ++;
+ opa = op & 0x3f;
+ if (op & 0xc0)
+ op &= 0xc0;
+
+ switch (op)
+ {
+ case DW_CFA_advance_loc:
+ frame_display_row (fc, &need_col_headers, &max_regs);
+#if FDEBUG
+ printf (" DW_CFA_advance_loc: %08x = %08x + %d*%d\n",
+ fc->pc_begin + opa * fc->code_factor, fc->pc_begin, opa, fc->code_factor);
+#endif
+ fc->pc_begin += opa * fc->code_factor;
+ break;
+
+ case DW_CFA_offset:
+ frame_need_space (fc, opa);
+ roffs = LEB ();
+#if FDEBUG
+ printf (" DW_CFA_offset: r%d = cfa[%d*%d]\n", opa, roffs, fc->data_factor);
+#endif
+ fc->col_type[opa] = DW_CFA_offset;
+ fc->col_offset[opa] = roffs * fc->data_factor;
+ break;
+
+ 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 },
generated by cgit v1.1 at 2024-12-19 10:03:52 +0000