binutils/addr2line.c

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