addr2line.c revision 78828 
1/* addr2line.c -- convert addresses to line number and function name
2   Copyright 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
3   Contributed by Ulrich Lauther <Ulrich.Lauther@mchp.siemens.de>
4
5   This file is part of GNU Binutils.
6
7   This program is free software; you can redistribute it and/or modify
8   it under the terms of the GNU General Public License as published by
9   the Free Software Foundation; either version 2, or (at your option)
10   any later version.
11
12   This program is distributed in the hope that it will be useful,
13   but WITHOUT ANY WARRANTY; without even the implied warranty of
14   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15   GNU General Public License for more details.
16
17   You should have received a copy of the GNU General Public License
18   along with this program; if not, write to the Free Software
19   Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
20
21/* Derived from objdump.c and nm.c by Ulrich.Lauther@mchp.siemens.de
22
23   Usage:
24   addr2line [options] addr addr ...
25   or
26   addr2line [options]
27
28   both forms write results to stdout, the second form reads addresses
29   to be converted from stdin.  */
30
31#include <ctype.h>
32#include <string.h>
33
34#include "bfd.h"
35#include "getopt.h"
36#include "libiberty.h"
37#include "demangle.h"
38#include "bucomm.h"
39
40extern char *program_version;
41
42static boolean with_functions;	/* -f, show function names.  */
43static boolean do_demangle;	/* -C, demangle names.  */
44static boolean base_names;	/* -s, strip directory names.  */
45
46static int naddr;		/* Number of addresses to process.  */
47static char **addr;		/* Hex addresses to process.  */
48
49static asymbol **syms;		/* Symbol table.  */
50
51static struct option long_options[] =
52{
53  {"basenames", no_argument, NULL, 's'},
54  {"demangle", optional_argument, NULL, 'C'},
55  {"exe", required_argument, NULL, 'e'},
56  {"functions", no_argument, NULL, 'f'},
57  {"target", required_argument, NULL, 'b'},
58  {"help", no_argument, NULL, 'H'},
59  {"version", no_argument, NULL, 'V'},
60  {0, no_argument, 0, 0}
61};
62
63static void usage PARAMS ((FILE *, int));
64static void slurp_symtab PARAMS ((bfd *));
65static void find_address_in_section PARAMS ((bfd *, asection *, PTR));
66static void translate_addresses PARAMS ((bfd *));
67static void process_file PARAMS ((const char *, const char *));
68
69/* Print a usage message to STREAM and exit with STATUS.  */
70
71static void
72usage (stream, status)
73     FILE *stream;
74     int status;
75{
76  fprintf (stream, _("\
77Usage: %s [-CfsHV] [-b bfdname] [--target=bfdname]\n\
78       [-e executable] [--exe=executable] [--demangle[=style]]\n\
79       [--basenames] [--functions] [addr addr ...]\n"),
80	   program_name);
81  list_supported_targets (program_name, stream);
82  if (status == 0)
83    fprintf (stream, _("Report bugs to %s\n"), REPORT_BUGS_TO);
84  exit (status);
85}
86
87/* Read in the symbol table.  */
88
89static void
90slurp_symtab (abfd)
91     bfd *abfd;
92{
93  long storage;
94  long symcount;
95
96  if ((bfd_get_file_flags (abfd) & HAS_SYMS) == 0)
97    return;
98
99  storage = bfd_get_symtab_upper_bound (abfd);
100  if (storage < 0)
101    bfd_fatal (bfd_get_filename (abfd));
102
103  syms = (asymbol **) xmalloc (storage);
104
105  symcount = bfd_canonicalize_symtab (abfd, syms);
106  if (symcount < 0)
107    bfd_fatal (bfd_get_filename (abfd));
108}
109
110/* These global variables are used to pass information between
111   translate_addresses and find_address_in_section.  */
112
113static bfd_vma pc;
114static const char *filename;
115static const char *functionname;
116static unsigned int line;
117static boolean found;
118
119/* Look for an address in a section.  This is called via
120   bfd_map_over_sections.  */
121
122static void
123find_address_in_section (abfd, section, data)
124     bfd *abfd;
125     asection *section;
126     PTR data ATTRIBUTE_UNUSED;
127{
128  bfd_vma vma;
129  bfd_size_type size;
130
131  if (found)
132    return;
133
134  if ((bfd_get_section_flags (abfd, section) & SEC_ALLOC) == 0)
135    return;
136
137  vma = bfd_get_section_vma (abfd, section);
138  if (pc < vma)
139    return;
140
141  size = bfd_get_section_size_before_reloc (section);
142  if (pc >= vma + size)
143    return;
144
145  found = bfd_find_nearest_line (abfd, section, syms, pc - vma,
146				 &filename, &functionname, &line);
147}
148
149/* Read hexadecimal addresses from stdin, translate into
150   file_name:line_number and optionally function name.  */
151
152static void
153translate_addresses (abfd)
154     bfd *abfd;
155{
156  int read_stdin = (naddr == 0);
157
158  for (;;)
159    {
160      if (read_stdin)
161	{
162	  char addr_hex[100];
163
164	  if (fgets (addr_hex, sizeof addr_hex, stdin) == NULL)
165	    break;
166	  pc = bfd_scan_vma (addr_hex, NULL, 16);
167	}
168      else
169	{
170	  if (naddr <= 0)
171	    break;
172	  --naddr;
173	  pc = bfd_scan_vma (*addr++, NULL, 16);
174	}
175
176      found = false;
177      bfd_map_over_sections (abfd, find_address_in_section, (PTR) NULL);
178
179      if (! found)
180	{
181	  if (with_functions)
182	    printf ("??\n");
183	  printf ("??:0\n");
184	}
185      else
186	{
187	  if (with_functions)
188	    {
189	      if (functionname == NULL || *functionname == '\0')
190		printf ("??\n");
191	      else if (! do_demangle)
192		printf ("%s\n", functionname);
193	      else
194		{
195		  char *res;
196
197		  res = cplus_demangle (functionname, DMGL_ANSI | DMGL_PARAMS);
198		  if (res == NULL)
199		    printf ("%s\n", functionname);
200		  else
201		    {
202		      printf ("%s\n", res);
203		      free (res);
204		    }
205		}
206	    }
207
208	  if (base_names && filename != NULL)
209	    {
210	      char *h;
211
212	      h = strrchr (filename, '/');
213	      if (h != NULL)
214		filename = h + 1;
215	    }
216
217	  printf ("%s:%u\n", filename ? filename : "??", line);
218	}
219
220      /* fflush() is essential for using this command as a server
221         child process that reads addresses from a pipe and responds
222         with line number information, processing one address at a
223         time.  */
224      fflush (stdout);
225    }
226}
227
228/* Process a file.  */
229
230static void
231process_file (filename, target)
232     const char *filename;
233     const char *target;
234{
235  bfd *abfd;
236  char **matching;
237
238  abfd = bfd_openr (filename, target);
239  if (abfd == NULL)
240    bfd_fatal (filename);
241
242  if (bfd_check_format (abfd, bfd_archive))
243    fatal (_("%s: can not get addresses from archive"), filename);
244
245  if (! bfd_check_format_matches (abfd, bfd_object, &matching))
246    {
247      bfd_nonfatal (bfd_get_filename (abfd));
248      if (bfd_get_error () == bfd_error_file_ambiguously_recognized)
249	{
250	  list_matching_formats (matching);
251	  free (matching);
252	}
253      xexit (1);
254    }
255
256  slurp_symtab (abfd);
257
258  translate_addresses (abfd);
259
260  if (syms != NULL)
261    {
262      free (syms);
263      syms = NULL;
264    }
265
266  bfd_close (abfd);
267}
268
269int
270main (argc, argv)
271     int argc;
272     char **argv;
273{
274  const char *filename;
275  char *target;
276  int c;
277
278#if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
279  setlocale (LC_MESSAGES, "");
280#endif
281  bindtextdomain (PACKAGE, LOCALEDIR);
282  textdomain (PACKAGE);
283
284  program_name = *argv;
285  xmalloc_set_program_name (program_name);
286
287  bfd_init ();
288  set_default_bfd_target ();
289
290  filename = NULL;
291  target = NULL;
292  while ((c = getopt_long (argc, argv, "b:Ce:sfHV", long_options, (int *) 0))
293	 != EOF)
294    {
295      switch (c)
296	{
297	case 0:
298	  break;		/* we've been given a long option */
299	case 'b':
300	  target = optarg;
301	  break;
302	case 'C':
303	  do_demangle = true;
304	  if (optarg != NULL)
305	    {
306	      enum demangling_styles style;
307
308	      style = cplus_demangle_name_to_style (optarg);
309	      if (style == unknown_demangling)
310		fatal (_("unknown demangling style `%s'"),
311		       optarg);
312
313	      cplus_demangle_set_style (style);
314           }
315	  break;
316	case 'e':
317	  filename = optarg;
318	  break;
319	case 's':
320	  base_names = true;
321	  break;
322	case 'f':
323	  with_functions = true;
324	  break;
325	case 'V':
326	  print_version ("addr2line");
327	  break;
328	case 'H':
329	  usage (stdout, 0);
330	  break;
331	default:
332	  usage (stderr, 1);
333	  break;
334	}
335    }
336
337  if (filename == NULL)
338    filename = "a.out";
339
340  addr = argv + optind;
341  naddr = argc - optind;
342
343  process_file (filename, target);
344
345  return 0;
346}
347