binutils/addr2line.c

   1 /* addr2line.c -- convert addresses to line number and function name
   2    Copyright 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
   3    2007, 2009  Free Software Foundation, Inc.
   4    Contributed by Ulrich Lauther <Ulrich.Lauther@mchp.siemens.de>
   5
   6    This file is part of GNU Binutils.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3, or (at your option)
  11    any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, 51 Franklin Street - Fifth Floor, Boston,
  21    MA 02110-1301, USA.  */
  22
  23
  24 /* Derived from objdump.c and nm.c by Ulrich.Lauther@mchp.siemens.de
  25
  26    Usage:
  27    addr2line [options] addr addr ...
  28    or
  29    addr2line [options]
  30
  31    both forms write results to stdout, the second form reads addresses
  32    to be converted from stdin.  */
  33
  34 #include "sysdep.h"
  35 #include "bfd.h"
  36 #include "getopt.h"
  37 #include "libiberty.h"
  38 #include "demangle.h"
  39 #include "bucomm.h"
  40
  41 static bfd_boolean unwind_inlines;      /* -i, unwind inlined functions. */
  42 static bfd_boolean with_addresses;      /* -a, show addresses.  */
  43 static bfd_boolean with_functions;      /* -f, show function names.  */
  44 static bfd_boolean do_demangle;         /* -C, demangle names.  */
  45 static bfd_boolean base_names;          /* -s, strip directory names.  */
  46
  47 static int naddr;               /* Number of addresses to process.  */
  48 static char **addr;             /* Hex addresses to process.  */
  49
  50 static asymbol **syms;          /* Symbol table.  */
  51
  52 static struct option long_options[] =
  53 {
  54   {"addresses", no_argument, NULL, 'a'},
  55   {"basenames", no_argument, NULL, 's'},
  56   {"demangle", optional_argument, NULL, 'C'},
  57   {"exe", required_argument, NULL, 'e'},
  58   {"functions", no_argument, NULL, 'f'},
  59   {"inlines", no_argument, NULL, 'i'},
  60   {"section", required_argument, NULL, 'j'},
  61   {"target", required_argument, NULL, 'b'},
  62   {"help", no_argument, NULL, 'H'},
  63   {"version", no_argument, NULL, 'V'},
  64   {0, no_argument, 0, 0}
  65 };
  66
  67 static void usage (FILE *, int);
  68 static void slurp_symtab (bfd *);
  69 static void find_address_in_section (bfd *, asection *, void *);
  70 static void find_offset_in_section (bfd *, asection *);
  71 static void translate_addresses (bfd *, asection *);
  72 \f
  73 /* Print a usage message to STREAM and exit with STATUS.  */
  74
  75 static void
  76 usage (FILE *stream, int status)
  77 {
  78   fprintf (stream, _("Usage: %s [option(s)] [addr(s)]\n"), program_name);
  79   fprintf (stream, _(" Convert addresses into line number/file name pairs.\n"));
  80   fprintf (stream, _(" If no addresses are specified on the command line, they will be read from stdin\n"));
  81   fprintf (stream, _(" The options are:\n\
  82   @<file>                Read options from <file>\n\
  83   -a --addresses         Show addresses\n\
  84   -b --target=<bfdname>  Set the binary file format\n\
  85   -e --exe=<executable>  Set the input file name (default is a.out)\n\
  86   -i --inlines           Unwind inlined functions\n\
  87   -j --section=<name>    Read section-relative offsets instead of addresses\n\
  88   -s --basenames         Strip directory names\n\
  89   -f --functions         Show function names\n\
  90   -C --demangle[=style]  Demangle function names\n\
  91   -h --help              Display this information\n\
  92   -v --version           Display the program's version\n\
  93 \n"));
  94
  95   list_supported_targets (program_name, stream);
  96   if (REPORT_BUGS_TO[0] && status == 0)
  97     fprintf (stream, _("Report bugs to %s\n"), REPORT_BUGS_TO);
  98   exit (status);
  99 }
 100 \f
 101 /* Read in the symbol table.  */
 102
 103 static void
 104 slurp_symtab (bfd *abfd)
 105 {
 106   long storage;
 107   long symcount;
 108   bfd_boolean dynamic = FALSE;
 109
 110   if ((bfd_get_file_flags (abfd) & HAS_SYMS) == 0)
 111     return;
 112
 113   storage = bfd_get_symtab_upper_bound (abfd);
 114   if (storage == 0)
 115     {
 116       storage = bfd_get_dynamic_symtab_upper_bound (abfd);
 117       dynamic = TRUE;
 118     }
 119   if (storage < 0)
 120     bfd_fatal (bfd_get_filename (abfd));
 121
 122   syms = (asymbol **) xmalloc (storage);
 123   if (dynamic)
 124     symcount = bfd_canonicalize_dynamic_symtab (abfd, syms);
 125   else
 126     symcount = bfd_canonicalize_symtab (abfd, syms);
 127   if (symcount < 0)
 128     bfd_fatal (bfd_get_filename (abfd));
 129 }
 130 \f
 131 /* These global variables are used to pass information between
 132    translate_addresses and find_address_in_section.  */
 133
 134 static bfd_vma pc;
 135 static const char *filename;
 136 static const char *functionname;
 137 static unsigned int line;
 138 static bfd_boolean found;
 139
 140 /* Look for an address in a section.  This is called via
 141    bfd_map_over_sections.  */
 142
 143 static void
 144 find_address_in_section (bfd *abfd, asection *section,
 145                          void *data ATTRIBUTE_UNUSED)
 146 {
 147   bfd_vma vma;
 148   bfd_size_type size;
 149
 150   if (found)
 151     return;
 152
 153   if ((bfd_get_section_flags (abfd, section) & SEC_ALLOC) == 0)
 154     return;
 155
 156   vma = bfd_get_section_vma (abfd, section);
 157   if (pc < vma)
 158     return;
 159
 160   size = bfd_get_section_size (section);
 161   if (pc >= vma + size)
 162     return;
 163
 164   found = bfd_find_nearest_line (abfd, section, syms, pc - vma,
 165                                  &filename, &functionname, &line);
 166 }
 167
 168 /* Look for an offset in a section.  This is directly called.  */
 169
 170 static void
 171 find_offset_in_section (bfd *abfd, asection *section)
 172 {
 173   bfd_size_type size;
 174
 175   if (found)
 176     return;
 177
 178   if ((bfd_get_section_flags (abfd, section) & SEC_ALLOC) == 0)
 179     return;
 180
 181   size = bfd_get_section_size (section);
 182   if (pc >= size)
 183     return;
 184
 185   found = bfd_find_nearest_line (abfd, section, syms, pc,
 186                                  &filename, &functionname, &line);
 187 }
 188
 189 /* Read hexadecimal addresses from stdin, translate into
 190    file_name:line_number and optionally function name.  */
 191
 192 static void
 193 translate_addresses (bfd *abfd, asection *section)
 194 {
 195   int read_stdin = (naddr == 0);
 196
 197   for (;;)
 198     {
 199       if (read_stdin)
 200         {
 201           char addr_hex[100];
 202
 203           if (fgets (addr_hex, sizeof addr_hex, stdin) == NULL)
 204             break;
 205           pc = bfd_scan_vma (addr_hex, NULL, 16);
 206         }
 207       else
 208         {
 209           if (naddr <= 0)
 210             break;
 211           --naddr;
 212           pc = bfd_scan_vma (*addr++, NULL, 16);
 213         }
 214
 215       if (with_addresses)
 216         {
 217           printf ("0x");
 218           bfd_printf_vma (abfd, pc);
 219           printf ("\n");
 220         }
 221
 222       found = FALSE;
 223       if (section)
 224         find_offset_in_section (abfd, section);
 225       else
 226         bfd_map_over_sections (abfd, find_address_in_section, NULL);
 227
 228       if (! found)
 229         {
 230           if (with_functions)
 231             printf ("??\n");
 232           printf ("??:0\n");
 233         }
 234       else
 235         {
 236           do {
 237             if (with_functions)
 238               {
 239                 const char *name;
 240                 char *alloc = NULL;
 241
 242                 name = functionname;
 243                 if (name == NULL || *name == '\0')
 244                   name = "??";
 245                 else if (do_demangle)
 246                   {
 247                     alloc = bfd_demangle (abfd, name, DMGL_ANSI | DMGL_PARAMS);
 248                     if (alloc != NULL)
 249                       name = alloc;
 250                   }
 251
 252                 printf ("%s\n", name);
 253
 254                 if (alloc != NULL)
 255                   free (alloc);
 256               }
 257
 258             if (base_names && filename != NULL)
 259               {
 260                 char *h;
 261
 262                 h = strrchr (filename, '/');
 263                 if (h != NULL)
 264                   filename = h + 1;
 265               }
 266
 267             printf ("%s:%u\n", filename ? filename : "??", line);
 268             if (!unwind_inlines)
 269               found = FALSE;
 270             else
 271               found = bfd_find_inliner_info (abfd, &filename, &functionname, &line);
 272           } while (found);
 273
 274         }
 275
 276       /* fflush() is essential for using this command as a server
 277          child process that reads addresses from a pipe and responds
 278          with line number information, processing one address at a
 279          time.  */
 280       fflush (stdout);
 281     }
 282 }
 283
 284 /* Process a file.  Returns an exit value for main().  */
 285
 286 static int
 287 process_file (const char *file_name, const char *section_name,
 288               const char *target)
 289 {
 290   bfd *abfd;
 291   asection *section;
 292   char **matching;
 293
 294   if (get_file_size (file_name) < 1)
 295     return 1;
 296
 297   abfd = bfd_openr (file_name, target);
 298   if (abfd == NULL)
 299     bfd_fatal (file_name);
 300
 301   if (bfd_check_format (abfd, bfd_archive))
 302     fatal (_("%s: cannot get addresses from archive"), file_name);
 303
 304   if (! bfd_check_format_matches (abfd, bfd_object, &matching))
 305     {
 306       bfd_nonfatal (bfd_get_filename (abfd));
 307       if (bfd_get_error () == bfd_error_file_ambiguously_recognized)
 308         {
 309           list_matching_formats (matching);
 310           free (matching);
 311         }
 312       xexit (1);
 313     }
 314
 315   if (section_name != NULL)
 316     {
 317       section = bfd_get_section_by_name (abfd, section_name);
 318       if (section == NULL)
 319         fatal (_("%s: cannot find section %s"), file_name, section_name);
 320     }
 321   else
 322     section = NULL;
 323
 324   slurp_symtab (abfd);
 325
 326   translate_addresses (abfd, section);
 327
 328   if (syms != NULL)
 329     {
 330       free (syms);
 331       syms = NULL;
 332     }
 333
 334   bfd_close (abfd);
 335
 336   return 0;
 337 }
 338 \f
 339 int
 340 main (int argc, char **argv)
 341 {
 342   const char *file_name;
 343   const char *section_name;
 344   char *target;
 345   int c;
 346
 347 #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
 348   setlocale (LC_MESSAGES, "");
 349 #endif
 350 #if defined (HAVE_SETLOCALE)
 351   setlocale (LC_CTYPE, "");
 352 #endif
 353   bindtextdomain (PACKAGE, LOCALEDIR);
 354   textdomain (PACKAGE);
 355
 356   program_name = *argv;
 357   xmalloc_set_program_name (program_name);
 358
 359   expandargv (&argc, &argv);
 360
 361   bfd_init ();
 362   set_default_bfd_target ();
 363
 364   file_name = NULL;
 365   section_name = NULL;
 366   target = NULL;
 367   while ((c = getopt_long (argc, argv, "ab:Ce:sfHhij:Vv", long_options, (int *) 0))
 368          != EOF)
 369     {
 370       switch (c)
 371         {
 372         case 0:
 373           break;                /* We've been given a long option.  */
 374         case 'a':
 375           with_addresses = TRUE;
 376           break;
 377         case 'b':
 378           target = optarg;
 379           break;
 380         case 'C':
 381           do_demangle = TRUE;
 382           if (optarg != NULL)
 383             {
 384               enum demangling_styles style;
 385
 386               style = cplus_demangle_name_to_style (optarg);
 387               if (style == unknown_demangling)
 388                 fatal (_("unknown demangling style `%s'"),
 389                        optarg);
 390
 391               cplus_demangle_set_style (style);
 392             }
 393           break;
 394         case 'e':
 395           file_name = optarg;
 396           break;
 397         case 's':
 398           base_names = TRUE;
 399           break;
 400         case 'f':
 401           with_functions = TRUE;
 402           break;
 403         case 'v':
 404         case 'V':
 405           print_version ("addr2line");
 406           break;
 407         case 'h':
 408         case 'H':
 409           usage (stdout, 0);
 410           break;
 411         case 'i':
 412           unwind_inlines = TRUE;
 413           break;
 414         case 'j':
 415           section_name = optarg;
 416           break;
 417         default:
 418           usage (stderr, 1);
 419           break;
 420         }
 421     }
 422
 423   if (file_name == NULL)
 424     file_name = "a.out";
 425
 426   addr = argv + optind;
 427   naddr = argc - optind;
 428
 429   return process_file (file_name, section_name, target);
 430 }