aboutsummaryrefslogtreecommitdiff
path: root/binutils/addr2line.c
blob: b5f5a0c5f15e615b0738e629fcad0938342fd857 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
/* addr2line.c -- convert addresses to line number and function name
   Copyright 1997, 1998, 1999, 2000, 2001, 2002, 2003
   Free Software Foundation, Inc.
   Contributed by Ulrich Lauther <Ulrich.Lauther@mchp.siemens.de>

   This file is part of GNU Binutils.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2, or (at your option)
   any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */

/* Derived from objdump.c and nm.c by Ulrich.Lauther@mchp.siemens.de

   Usage:
   addr2line [options] addr addr ...
   or
   addr2line [options]

   both forms write results to stdout, the second form reads addresses
   to be converted from stdin.  */

#include <string.h>

#include "bfd.h"
#include "getopt.h"
#include "libiberty.h"
#include "demangle.h"
#include "bucomm.h"
#include "budemang.h"

static bfd_boolean with_functions;	/* -f, show function names.  */
static bfd_boolean do_demangle;		/* -C, demangle names.  */
static bfd_boolean base_names;		/* -s, strip directory names.  */

static int naddr;		/* Number of addresses to process.  */
static char **addr;		/* Hex addresses to process.  */

static asymbol **syms;		/* Symbol table.  */

static struct option long_options[] =
{
  {"basenames", no_argument, NULL, 's'},
  {"demangle", optional_argument, NULL, 'C'},
  {"exe", required_argument, NULL, 'e'},
  {"functions", no_argument, NULL, 'f'},
  {"target", required_argument, NULL, 'b'},
  {"help", no_argument, NULL, 'H'},
  {"version", no_argument, NULL, 'V'},
  {0, no_argument, 0, 0}
};

static void usage (FILE *, int);
static void slurp_symtab (bfd *);
static void find_address_in_section (bfd *, asection *, void *);
static void translate_addresses (bfd *);
static void process_file (const char *, const char *);

/* Print a usage message to STREAM and exit with STATUS.  */

static void
usage (FILE *stream, int status)
{
  fprintf (stream, _("Usage: %s [option(s)] [addr(s)]\n"), program_name);
  fprintf (stream, _(" Convert addresses into line number/file name pairs.\n"));
  fprintf (stream, _(" If no addresses are specified on the command line, they will be read from stdin\n"));
  fprintf (stream, _(" The options are:\n\
  -b --target=<bfdname>  Set the binary file format\n\
  -e --exe=<executable>  Set the input file name (default is a.out)\n\
  -s --basenames         Strip directory names\n\
  -f --functions         Show function names\n\
  -C --demangle[=style]  Demangle function names\n\
  -h --help              Display this information\n\
  -v --version           Display the program's version\n\
\n"));

  list_supported_targets (program_name, stream);
  if (status == 0)
    fprintf (stream, _("Report bugs to %s\n"), REPORT_BUGS_TO);
  exit (status);
}

/* Read in the symbol table.  */

static void
slurp_symtab (bfd *abfd)
{
  long symcount;
  unsigned int size;

  if ((bfd_get_file_flags (abfd) & HAS_SYMS) == 0)
    return;

  symcount = bfd_read_minisymbols (abfd, FALSE, (void *) &syms, &size);
  if (symcount == 0)
    symcount = bfd_read_minisymbols (abfd, TRUE /* dynamic */, (void *) &syms, &size);

  if (symcount < 0)
    bfd_fatal (bfd_get_filename (abfd));
}

/* These global variables are used to pass information between
   translate_addresses and find_address_in_section.  */

static bfd_vma pc;
static const char *filename;
static const char *functionname;
static unsigned int line;
static bfd_boolean found;

/* Look for an address in a section.  This is called via
   bfd_map_over_sections.  */

static void
find_address_in_section (bfd *abfd, asection *section,
			 void *data ATTRIBUTE_UNUSED)
{
  bfd_vma vma;
  bfd_size_type size;

  if (found)
    return;

  if ((bfd_get_section_flags (abfd, section) & SEC_ALLOC) == 0)
    return;

  vma = bfd_get_section_vma (abfd, section);
  if (pc < vma)
    return;

  size = bfd_get_section_size_before_reloc (section);
  if (pc >= vma + size)
    return;

  found = bfd_find_nearest_line (abfd, section, syms, pc - vma,
				 &filename, &functionname, &line);
}

/* Read hexadecimal addresses from stdin, translate into
   file_name:line_number and optionally function name.  */

static void
translate_addresses (bfd *abfd)
{
  int read_stdin = (naddr == 0);

  for (;;)
    {
      if (read_stdin)
	{
	  char addr_hex[100];

	  if (fgets (addr_hex, sizeof addr_hex, stdin) == NULL)
	    break;
	  pc = bfd_scan_vma (addr_hex, NULL, 16);
	}
      else
	{
	  if (naddr <= 0)
	    break;
	  --naddr;
	  pc = bfd_scan_vma (*addr++, NULL, 16);
	}

      found = FALSE;
      bfd_map_over_sections (abfd, find_address_in_section, NULL);

      if (! found)
	{
	  if (with_functions)
	    printf ("??\n");
	  printf ("??:0\n");
	}
      else
	{
	  if (with_functions)
	    {
	      const char *name;
	      char *alloc = NULL;

	      name = functionname;
	      if (name == NULL || *name == '\0')
		name = "??";
	      else if (do_demangle)
		{
		  alloc = demangle (abfd, name);
		  name = alloc;
		}

	      printf ("%s\n", name);

	      if (alloc != NULL)
		free (alloc);
	    }

	  if (base_names && filename != NULL)
	    {
	      char *h;

	      h = strrchr (filename, '/');
	      if (h != NULL)
		filename = h + 1;
	    }

	  printf ("%s:%u\n", filename ? filename : "??", line);
	}

      /* fflush() is essential for using this command as a server
         child process that reads addresses from a pipe and responds
         with line number information, processing one address at a
         time.  */
      fflush (stdout);
    }
}

/* Process a file.  */

static void
process_file (const char *file_name, const char *target)
{
  bfd *abfd;
  char **matching;

  abfd = bfd_openr (file_name, target);
  if (abfd == NULL)
    bfd_fatal (file_name);

  if (bfd_check_format (abfd, bfd_archive))
    fatal (_("%s: can not get addresses from archive"), file_name);

  if (! bfd_check_format_matches (abfd, bfd_object, &matching))
    {
      bfd_nonfatal (bfd_get_filename (abfd));
      if (bfd_get_error () == bfd_error_file_ambiguously_recognized)
	{
	  list_matching_formats (matching);
	  free (matching);
	}
      xexit (1);
    }

  slurp_symtab (abfd);

  translate_addresses (abfd);

  if (syms != NULL)
    {
      free (syms);
      syms = NULL;
    }

  bfd_close (abfd);
}

int main (int, char **);

int
main (int argc, char **argv)
{
  const char *file_name;
  char *target;
  int c;

#if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
  setlocale (LC_MESSAGES, "");
#endif
#if defined (HAVE_SETLOCALE)
  setlocale (LC_CTYPE, "");
#endif
  bindtextdomain (PACKAGE, LOCALEDIR);
  textdomain (PACKAGE);

  program_name = *argv;
  xmalloc_set_program_name (program_name);

  bfd_init ();
  set_default_bfd_target ();

  file_name = NULL;
  target = NULL;
  while ((c = getopt_long (argc, argv, "b:Ce:sfHhVv", long_options, (int *) 0))
	 != EOF)
    {
      switch (c)
	{
	case 0:
	  break;		/* We've been given a long option.  */
	case 'b':
	  target = optarg;
	  break;
	case 'C':
	  do_demangle = TRUE;
	  if (optarg != NULL)
	    {
	      enum demangling_styles style;

	      style = cplus_demangle_name_to_style (optarg);
	      if (style == unknown_demangling)
		fatal (_("unknown demangling style `%s'"),
		       optarg);

	      cplus_demangle_set_style (style);
	    }
	  break;
	case 'e':
	  file_name = optarg;
	  break;
	case 's':
	  base_names = TRUE;
	  break;
	case 'f':
	  with_functions = TRUE;
	  break;
	case 'v':
	case 'V':
	  print_version ("addr2line");
	  break;
	case 'h':
	case 'H':
	  usage (stdout, 0);
	  break;
	default:
	  usage (stderr, 1);
	  break;
	}
    }

  if (file_name == NULL)
    file_name = "a.out";

  addr = argv + optind;
  naddr = argc - optind;

  process_file (file_name, target);

  return 0;
}