示例#1
0
文件: rddbg.c 项目: CromFr/gdb
static bfd_boolean
read_symbol_stabs_debugging_info (bfd *abfd, asymbol **syms, long symcount,
				  void *dhandle, bfd_boolean *pfound)
{
  void *shandle;
  asymbol **ps, **symend;

  shandle = NULL;
  symend = syms + symcount;
  for (ps = syms; ps < symend; ps++)
    {
      symbol_info i;

      bfd_get_symbol_info (abfd, *ps, &i);

      if (i.type == '-')
	{
	  const char *s;
	  char *f;

	  if (shandle == NULL)
	    {
	      shandle = start_stab (dhandle, abfd, FALSE, syms, symcount);
	      if (shandle == NULL)
		return FALSE;
	    }

	  *pfound = TRUE;

	  s = i.name;
	  f = NULL;
	  while (s[strlen (s) - 1] == '\\'
		 && ps + 1 < symend)
	    {
	      char *sc, *n;

	      ++ps;
	      sc = xstrdup (s);
	      sc[strlen (sc) - 1] = '\0';
	      n = concat (sc, bfd_asymbol_name (*ps), (const char *) NULL);
	      free (sc);
	      if (f != NULL)
		free (f);
	      f = n;
	      s = n;
	    }

	  save_stab (i.stab_type, i.stab_desc, i.value, s);

	  if (! parse_stab (dhandle, shandle, i.stab_type, i.stab_desc,
			    i.value, s))
	    {
	      stab_context ();
	      free_saved_stabs ();
	      return FALSE;
	    }

	  /* Don't free f, since I think the stabs code expects
	     strings to hang around.  This should be straightened out.
	     FIXME.  */
	}
    }

  free_saved_stabs ();

  if (shandle != NULL)
    {
      if (! finish_stab (dhandle, shandle))
	return FALSE;
    }

  return TRUE;
}
示例#2
0
文件: rddbg.c 项目: CromFr/gdb
static bfd_boolean
read_section_stabs_debugging_info (bfd *abfd, asymbol **syms, long symcount,
				   void *dhandle, bfd_boolean *pfound)
{
  static struct
    {
      const char *secname;
      const char *strsecname;
    }
  names[] =
    {
      { ".stab", ".stabstr" },
      { "LC_SYMTAB.stabs", "LC_SYMTAB.stabstr" },
      { "$GDB_SYMBOLS$", "$GDB_STRINGS$" }
    };
  unsigned int i;
  void *shandle;

  *pfound = FALSE;
  shandle = NULL;

  for (i = 0; i < sizeof names / sizeof names[0]; i++)
    {
      asection *sec, *strsec;

      sec = bfd_get_section_by_name (abfd, names[i].secname);
      strsec = bfd_get_section_by_name (abfd, names[i].strsecname);
      if (sec != NULL && strsec != NULL)
	{
	  bfd_size_type stabsize, strsize;
	  bfd_byte *stabs, *strings;
	  bfd_byte *stab;
	  bfd_size_type stroff, next_stroff;

	  stabsize = bfd_section_size (abfd, sec);
	  stabs = (bfd_byte *) xmalloc (stabsize);
	  if (! bfd_get_section_contents (abfd, sec, stabs, 0, stabsize))
	    {
	      fprintf (stderr, "%s: %s: %s\n",
		       bfd_get_filename (abfd), names[i].secname,
		       bfd_errmsg (bfd_get_error ()));
	      return FALSE;
	    }

	  strsize = bfd_section_size (abfd, strsec);
	  strings = (bfd_byte *) xmalloc (strsize + 1);
	  if (! bfd_get_section_contents (abfd, strsec, strings, 0, strsize))
	    {
	      fprintf (stderr, "%s: %s: %s\n",
		       bfd_get_filename (abfd), names[i].strsecname,
		       bfd_errmsg (bfd_get_error ()));
	      return FALSE;
	    }
	  /* Zero terminate the strings table, just in case.  */
	  strings [strsize] = 0;
	  if (shandle == NULL)
	    {
	      shandle = start_stab (dhandle, abfd, TRUE, syms, symcount);
	      if (shandle == NULL)
		return FALSE;
	    }

	  *pfound = TRUE;

	  stroff = 0;
	  next_stroff = 0;
	  /* PR 17512: file: 078-60391-0.001:0.1.  */
	  for (stab = stabs; stab <= (stabs + stabsize) - 12; stab += 12)
	    {
	      unsigned int strx;
	      int type;
	      int other ATTRIBUTE_UNUSED;
	      int desc;
	      bfd_vma value;

	      /* This code presumes 32 bit values.  */

	      strx = bfd_get_32 (abfd, stab);
	      type = bfd_get_8 (abfd, stab + 4);
	      other = bfd_get_8 (abfd, stab + 5);
	      desc = bfd_get_16 (abfd, stab + 6);
	      value = bfd_get_32 (abfd, stab + 8);

	      if (type == 0)
		{
		  /* Special type 0 stabs indicate the offset to the
		     next string table.  */
		  stroff = next_stroff;
		  next_stroff += value;
		}
	      else
		{
		  size_t len;
		  char *f, *s;

		  if (stroff + strx >= strsize)
		    {
		      fprintf (stderr, _("%s: %s: stab entry %ld is corrupt, strx = 0x%x, type = %d\n"),
			       bfd_get_filename (abfd), names[i].secname,
			       (long) (stab - stabs) / 12, strx, type);
		      continue;
		    }

		  s = (char *) strings + stroff + strx;
		  f = NULL;

		  /* PR 17512: file: 002-87578-0.001:0.1.
		     It is possible to craft a file where, without the 'strlen (s) > 0',
		     an attempt to read the byte before 'strings' would occur.  */
		  while ((len = strlen (s)) > 0
			 && s[len  - 1] == '\\'
			 && stab + 12 < stabs + stabsize)
		    {
		      char *p;

		      stab += 12;
		      p = s + len - 1;
		      *p = '\0';
		      strx = stroff + bfd_get_32 (abfd, stab);
		      if (strx >= strsize)
			{
			  fprintf (stderr, _("%s: %s: stab entry %ld is corrupt\n"),
				   bfd_get_filename (abfd), names[i].secname,
				   (long) (stab - stabs) / 12);
			  break;
			}
		      else
			s = concat (s, (char *) strings + strx,
				    (const char *) NULL);

		      /* We have to restore the backslash, because, if
			 the linker is hashing stabs strings, we may
			 see the same string more than once.  */
		      *p = '\\';

		      if (f != NULL)
			free (f);
		      f = s;
		    }

		  save_stab (type, desc, value, s);

		  if (! parse_stab (dhandle, shandle, type, desc, value, s))
		    {
		      stab_context ();
		      free_saved_stabs ();
		      return FALSE;
		    }

		  /* Don't free f, since I think the stabs code
		     expects strings to hang around.  This should be
		     straightened out.  FIXME.  */
		}
	    }

	  free_saved_stabs ();
	  free (stabs);

	  /* Don't free strings, since I think the stabs code expects
	     the strings to hang around.  This should be straightened
	     out.  FIXME.  */
	}
    }

  if (shandle != NULL)
    {
      if (! finish_stab (dhandle, shandle))
	return FALSE;
    }

  return TRUE;
}
示例#3
0
static bfd_boolean
read_section_stabs_debugging_info (bfd *abfd, asymbol **syms, long symcount,
				   void *dhandle, bfd_boolean *pfound)
{
  static struct
    {
      const char *secname;
      const char *strsecname;
    } names[] = { { ".stab", ".stabstr" },
		  { "LC_SYMTAB.stabs", "LC_SYMTAB.stabstr" } };
  unsigned int i;
  void *shandle;

  *pfound = FALSE;
  shandle = NULL;

  for (i = 0; i < sizeof names / sizeof names[0]; i++)
    {
      asection *sec, *strsec;

      sec = bfd_get_section_by_name (abfd, names[i].secname);
      strsec = bfd_get_section_by_name (abfd, names[i].strsecname);
      if (sec != NULL && strsec != NULL)
	{
	  bfd_size_type stabsize, strsize;
	  bfd_byte *stabs, *strings;
	  bfd_byte *stab;
	  bfd_size_type stroff, next_stroff;

	  stabsize = bfd_section_size (abfd, sec);
	  stabs = (bfd_byte *) xmalloc (stabsize);
	  if (! bfd_get_section_contents (abfd, sec, stabs, 0, stabsize))
	    {
	      fprintf (stderr, "%s: %s: %s\n",
		       bfd_get_filename (abfd), names[i].secname,
		       bfd_errmsg (bfd_get_error ()));
	      return FALSE;
	    }

	  strsize = bfd_section_size (abfd, strsec);
	  strings = (bfd_byte *) xmalloc (strsize);
	  if (! bfd_get_section_contents (abfd, strsec, strings, 0, strsize))
	    {
	      fprintf (stderr, "%s: %s: %s\n",
		       bfd_get_filename (abfd), names[i].strsecname,
		       bfd_errmsg (bfd_get_error ()));
	      return FALSE;
	    }

	  if (shandle == NULL)
	    {
	      shandle = start_stab (dhandle, abfd, TRUE, syms, symcount);
	      if (shandle == NULL)
		return FALSE;
	    }

	  *pfound = TRUE;

	  stroff = 0;
	  next_stroff = 0;
	  for (stab = stabs; stab < (stabs + stabsize); stab += 12)
	    {
	      unsigned int strx;
	      int type;
	      int other;
	      int desc;
	      bfd_vma value;

	      /* This code presumes 32 bit values: */
	      strx = bfd_get_32(abfd, stab);
	      type = bfd_get_8(abfd, stab + 4);
	      other = bfd_get_8(abfd, stab + 5);
	      desc = bfd_get_16(abfd, stab + 6);
	      value = bfd_get_32(abfd, stab + 8);

	      if (type == 0)
		{
		  /* Special type 0 stabs indicate the offset to the
		     next string table.  */
		  stroff = next_stroff;
		  next_stroff += value;
		}
	      else
		{
		  char *f, *s;

		  f = NULL;

		  if ((stroff + strx) > strsize)
		    {
		      fprintf(stderr,
                              "%s: %s: stab entry %ld is corrupt, strx = 0x%x, type = %d, other = %d\n",
                              bfd_get_filename(abfd), names[i].secname,
                              (long)(stab - stabs) / 12, strx, type,
                              other);
		      continue;
		    }

		  s = (char *) strings + stroff + strx;

		  while (s[strlen (s) - 1] == '\\'
			 && stab + 12 < stabs + stabsize)
		    {
		      char *p;

		      stab += 12;
		      p = s + strlen (s) - 1;
		      *p = '\0';
		      s = concat (s,
				  ((char *) strings
				   + stroff
				   + bfd_get_32 (abfd, stab)),
				  (const char *) NULL);

		      /* We have to restore the backslash, because, if
			 the linker is hashing stabs strings, we may
			 see the same string more than once.  */
		      *p = '\\';

		      if (f != NULL)
			free (f);
		      f = s;
		    }

		  save_stab (type, desc, value, s);

		  if (! parse_stab (dhandle, shandle, type, desc, value, s))
		    {
		      stab_context ();
		      free_saved_stabs ();
		      return FALSE;
		    }

		  /* Don't free f, since I think the stabs code
		     expects strings to hang around.  This should be
		     straightened out.  FIXME.  */
		}
	    }

	  free_saved_stabs ();
	  free (stabs);

	  /* Don't free strings, since I think the stabs code expects
	     the strings to hang around.  This should be straightened
	     out.  FIXME.  */
	}
    }

  if (shandle != NULL)
    {
      if (! finish_stab (dhandle, shandle))
	return FALSE;
    }

  return TRUE;
}