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 #include "elf-bfd.h"
  41
  42 static bfd_boolean unwind_inlines;      /* -i, unwind inlined functions. */
  43 static bfd_boolean with_addresses;      /* -a, show addresses.  */
  44 static bfd_boolean with_functions;      /* -f, show function names.  */
  45 static bfd_boolean do_demangle;         /* -C, demangle names.  */
  46 static bfd_boolean pretty_print;        /* -p, print on one line.  */
  47 static bfd_boolean base_names;          /* -s, strip directory names.  */
  48
  49 static int naddr;               /* Number of addresses to process.  */
  50 static char **addr;             /* Hex addresses to process.  */
  51
  52 static asymbol **syms;          /* Symbol table.  */
  53
  54 static struct option long_options[] =
  55 {
  56   {"addresses", no_argument, NULL, 'a'},
  57   {"basenames", no_argument, NULL, 's'},
  58   {"demangle", optional_argument, NULL, 'C'},
  59   {"exe", required_argument, NULL, 'e'},
  60   {"functions", no_argument, NULL, 'f'},
  61   {"inlines", no_argument, NULL, 'i'},
  62   {"pretty-print", no_argument, NULL, 'p'},
  63   {"section", required_argument, NULL, 'j'},
  64   {"target", required_argument, NULL, 'b'},
  65   {"help", no_argument, NULL, 'H'},
  66   {"version", no_argument, NULL, 'V'},
  67   {0, no_argument, 0, 0}
  68 };
  69
  70 static void usage (FILE *, int);
  71 static void slurp_symtab (bfd *);
  72 static void find_address_in_section (bfd *, asection *, void *);
  73 static void find_offset_in_section (bfd *, asection *);
  74 static void translate_addresses (bfd *, asection *);
  75 \f
  76 /* Print a usage message to STREAM and exit with STATUS.  */
  77
  78 static void
  79 usage (FILE *stream, int status)
  80 {
  81   fprintf (stream, _("Usage: %s [option(s)] [addr(s)]\n"), program_name);
  82   fprintf (stream, _(" Convert addresses into line number/file name pairs.\n"));
  83   fprintf (stream, _(" If no addresses are specified on the command line, they will be read from stdin\n"));
  84   fprintf (stream, _(" The options are:\n\
  85   @<file>                Read options from <file>\n\
  86   -a --addresses         Show addresses\n\
  87   -b --target=<bfdname>  Set the binary file format\n\
  88   -e --exe=<executable>  Set the input file name (default is a.out)\n\
  89   -i --inlines           Unwind inlined functions\n\
  90   -j --section=<name>    Read section-relative offsets instead of addresses\n\
  91   -p --pretty-print      Make the output easier to read for humans\n\
  92   -s --basenames         Strip directory names\n\
  93   -f --functions         Show function names\n\
  94   -C --demangle[=style]  Demangle function names\n\
  95   -h --help              Display this information\n\
  96   -v --version           Display the program's version\n\
  97 \n"));
  98
  99   list_supported_targets (program_name, stream);
 100   if (REPORT_BUGS_TO[0] && status == 0)
 101     fprintf (stream, _("Report bugs to %s\n"), REPORT_BUGS_TO);
 102   exit (status);
 103 }
 104 \f
 105 /* Read in the symbol table.  */
 106
 107 static void
 108 slurp_symtab (bfd *abfd)
 109 {
 110   long storage;
 111   long symcount;
 112   bfd_boolean dynamic = FALSE;
 113
 114   if ((bfd_get_file_flags (abfd) & HAS_SYMS) == 0)
 115     return;
 116
 117   storage = bfd_get_symtab_upper_bound (abfd);
 118   if (storage == 0)
 119     {
 120       storage = bfd_get_dynamic_symtab_upper_bound (abfd);
 121       dynamic = TRUE;
 122     }
 123   if (storage < 0)
 124     bfd_fatal (bfd_get_filename (abfd));
 125
 126   syms = (asymbol **) xmalloc (storage);
 127   if (dynamic)
 128     symcount = bfd_canonicalize_dynamic_symtab (abfd, syms);
 129   else
 130     symcount = bfd_canonicalize_symtab (abfd, syms);
 131   if (symcount < 0)
 132     bfd_fatal (bfd_get_filename (abfd));
 133 }
 134 \f
 135 /* These global variables are used to pass information between
 136    translate_addresses and find_address_in_section.  */
 137
 138 static bfd_vma pc;
 139 static const char *filename;
 140 static const char *functionname;
 141 static unsigned int line;
 142 static bfd_boolean found;
 143
 144 /* Look for an address in a section.  This is called via
 145    bfd_map_over_sections.  */
 146
 147 static void
 148 find_address_in_section (bfd *abfd, asection *section,
 149                          void *data ATTRIBUTE_UNUSED)
 150 {
 151   bfd_vma vma;
 152   bfd_size_type size;
 153
 154   if (found)
 155     return;
 156
 157   if ((bfd_get_section_flags (abfd, section) & SEC_ALLOC) == 0)
 158     return;
 159
 160   vma = bfd_get_section_vma (abfd, section);
 161   if (pc < vma)
 162     return;
 163
 164   size = bfd_get_section_size (section);
 165   if (pc >= vma + size)
 166     return;
 167
 168   found = bfd_find_nearest_line (abfd, section, syms, pc - vma,
 169                                  &filename, &functionname, &line);
 170 }
 171
 172 /* Look for an offset in a section.  This is directly called.  */
 173
 174 static void
 175 find_offset_in_section (bfd *abfd, asection *section)
 176 {
 177   bfd_size_type size;
 178
 179   if (found)
 180     return;
 181
 182   if ((bfd_get_section_flags (abfd, section) & SEC_ALLOC) == 0)
 183     return;
 184
 185   size = bfd_get_section_size (section);
 186   if (pc >= size)
 187     return;
 188
 189   found = bfd_find_nearest_line (abfd, section, syms, pc,
 190                                  &filename, &functionname, &line);
 191 }
 192
 193 /* Read hexadecimal addresses from stdin, translate into
 194    file_name:line_number and optionally function name.  */
 195
 196 static void
 197 translate_addresses (bfd *abfd, asection *section)
 198 {
 199   int read_stdin = (naddr == 0);
 200
 201   for (;;)
 202     {
 203       if (read_stdin)
 204         {
 205           char addr_hex[100];
 206
 207           if (fgets (addr_hex, sizeof addr_hex, stdin) == NULL)
 208             break;
 209           pc = bfd_scan_vma (addr_hex, NULL, 16);
 210         }
 211       else
 212         {
 213           if (naddr <= 0)
 214             break;
 215           --naddr;
 216           pc = bfd_scan_vma (*addr++, NULL, 16);
 217         }
 218
 219       if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
 220         {
 221           const struct elf_backend_data *bed = get_elf_backend_data (abfd);
 222           bfd_vma sign = (bfd_vma) 1 << (bed->s->arch_size - 1);
 223
 224           pc &= (sign << 1) - 1;
 225           if (bed->sign_extend_vma)
 226             pc = (pc ^ sign) - sign;
 227         }
 228
 229       if (with_addresses)
 230         {
 231           printf ("0x");
 232           bfd_printf_vma (abfd, pc);
 233
 234           if (pretty_print)
 235             printf (": ");
 236           else
 237             printf ("\n");
 238         }
 239
 240       found = FALSE;
 241       if (section)
 242         find_offset_in_section (abfd, section);
 243       else
 244         bfd_map_over_sections (abfd, find_address_in_section, NULL);
 245
 246       if (! found)
 247         {
 248           if (with_functions)
 249             printf ("??\n");
 250           printf ("??:0\n");
 251         }
 252       else
 253         {
 254           while (1)
 255             {
 256               if (with_functions)
 257                 {
 258                   const char *name;
 259                   char *alloc = NULL;
 260
 261                   name = functionname;
 262                   if (name == NULL || *name == '\0')
 263                     name = "??";
 264                   else if (do_demangle)
 265                     {
 266                       alloc = bfd_demangle (abfd, name, DMGL_ANSI | DMGL_PARAMS);
 267                       if (alloc != NULL)
 268                         name = alloc;
 269                     }
 270
 271                   printf ("%s", name);
 272                   if (pretty_print)
 273                     /* Note for translators:  This printf is used to join the
 274                        function name just printed above to the line number/
 275                        file name pair that is about to be printed below.  Eg:
 276
 277                          foo at 123:bar.c  */
 278                     printf (_(" at "));
 279                   else
 280                     printf ("\n");
 281
 282                   if (alloc != NULL)
 283                     free (alloc);
 284                 }
 285
 286               if (base_names && filename != NULL)
 287                 {
 288                   char *h;
 289
 290                   h = strrchr (filename, '/');
 291                   if (h != NULL)
 292                     filename = h + 1;
 293                 }
 294
 295               printf ("%s:", filename ? filename : "??");
 296               if (line != 0)
 297                 printf ("%u\n", line);
 298               else
 299                 printf ("?\n");
 300               if (!unwind_inlines)
 301                 found = FALSE;
 302               else
 303                 found = bfd_find_inliner_info (abfd, &filename, &functionname,
 304                                                &line);
 305               if (! found)
 306                 break;
 307               if (pretty_print)
 308                 /* Note for translators: This printf is used to join the
 309                    line number/file name pair that has just been printed with
 310                    the line number/file name pair that is going to be printed
 311                    by the next iteration of the while loop.  Eg:
 312
 313                      123:bar.c (inlined by) 456:main.c  */
 314                 printf (_(" (inlined by) "));
 315             }
 316         }
 317
 318       /* fflush() is essential for using this command as a server
 319          child process that reads addresses from a pipe and responds
 320          with line number information, processing one address at a
 321          time.  */
 322       fflush (stdout);
 323     }
 324 }
 325
 326 /* Process a file.  Returns an exit value for main().  */
 327
 328 static int
 329 process_file (const char *file_name, const char *section_name,
 330               const char *target)
 331 {
 332   bfd *abfd;
 333   asection *section;
 334   char **matching;
 335
 336   if (get_file_size (file_name) < 1)
 337     return 1;
 338
 339   abfd = bfd_openr (file_name, target);
 340   if (abfd == NULL)
 341     bfd_fatal (file_name);
 342
 343   /* Decompress sections.  */
 344   abfd->flags |= BFD_DECOMPRESS;
 345
 346   if (bfd_check_format (abfd, bfd_archive))
 347     fatal (_("%s: cannot get addresses from archive"), file_name);
 348
 349   if (! bfd_check_format_matches (abfd, bfd_object, &matching))
 350     {
 351       bfd_nonfatal (bfd_get_filename (abfd));
 352       if (bfd_get_error () == bfd_error_file_ambiguously_recognized)
 353         {
 354           list_matching_formats (matching);
 355           free (matching);
 356         }
 357       xexit (1);
 358     }
 359
 360   if (section_name != NULL)
 361     {
 362       section = bfd_get_section_by_name (abfd, section_name);
 363       if (section == NULL)
 364         fatal (_("%s: cannot find section %s"), file_name, section_name);
 365     }
 366   else
 367     section = NULL;
 368
 369   slurp_symtab (abfd);
 370
 371   translate_addresses (abfd, section);
 372
 373   if (syms != NULL)
 374     {
 375       free (syms);
 376       syms = NULL;
 377     }
 378
 379   bfd_close (abfd);
 380
 381   return 0;
 382 }
 383 \f
 384 int
 385 main (int argc, char **argv)
 386 {
 387   const char *file_name;
 388   const char *section_name;
 389   char *target;
 390   int c;
 391
 392 #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
 393   setlocale (LC_MESSAGES, "");
 394 #endif
 395 #if defined (HAVE_SETLOCALE)
 396   setlocale (LC_CTYPE, "");
 397 #endif
 398   bindtextdomain (PACKAGE, LOCALEDIR);
 399   textdomain (PACKAGE);
 400
 401   program_name = *argv;
 402   xmalloc_set_program_name (program_name);
 403
 404   expandargv (&argc, &argv);
 405
 406   bfd_init ();
 407   set_default_bfd_target ();
 408
 409   file_name = NULL;
 410   section_name = NULL;
 411   target = NULL;
 412   while ((c = getopt_long (argc, argv, "ab:Ce:sfHhij:pVv", long_options, (int *) 0))
 413          != EOF)
 414     {
 415       switch (c)
 416         {
 417         case 0:
 418           break;                /* We've been given a long option.  */
 419         case 'a':
 420           with_addresses = TRUE;
 421           break;
 422         case 'b':
 423           target = optarg;
 424           break;
 425         case 'C':
 426           do_demangle = TRUE;
 427           if (optarg != NULL)
 428             {
 429               enum demangling_styles style;
 430
 431               style = cplus_demangle_name_to_style (optarg);
 432               if (style == unknown_demangling)
 433                 fatal (_("unknown demangling style `%s'"),
 434                        optarg);
 435
 436               cplus_demangle_set_style (style);
 437             }
 438           break;
 439         case 'e':
 440           file_name = optarg;
 441           break;
 442         case 's':
 443           base_names = TRUE;
 444           break;
 445         case 'f':
 446           with_functions = TRUE;
 447           break;
 448         case 'p':
 449           pretty_print = TRUE;
 450           break;
 451         case 'v':
 452         case 'V':
 453           print_version ("addr2line");
 454           break;
 455         case 'h':
 456         case 'H':
 457           usage (stdout, 0);
 458           break;
 459         case 'i':
 460           unwind_inlines = TRUE;
 461           break;
 462         case 'j':
 463           section_name = optarg;
 464           break;
 465         default:
 466           usage (stderr, 1);
 467           break;
 468         }
 469     }
 470
 471   if (file_name == NULL)
 472     file_name = "a.out";
 473
 474   addr = argv + optind;
 475   naddr = argc - optind;
 476
 477   return process_file (file_name, section_name, target);
 478 }