binutils/addr2line.c

   1 /* addr2line.c -- convert addresses to line number and function name
   2    Copyright 1997, 1998, 1999 Free Software Foundation, Inc.
   3    Contributed by Ulrich Lauther <Ulrich.Lauther@zfe.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@zfe.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
  40 extern char *program_version;
  41
  42 static boolean with_functions;  /* -f, show function names.  */
  43 static boolean do_demangle;     /* -C, demangle names.  */
  44 static boolean base_names;      /* -s, strip directory names.  */
  45
  46 static int naddr;               /* Number of addresses to process.  */
  47 static char **addr;             /* Hex addresses to process.  */
  48
  49 static asymbol **syms;          /* Symbol table.  */
  50
  51 static struct option long_options[] =
  52 {
  53   {"basenames", no_argument, NULL, 's'},
  54   {"demangle", no_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
  63 static void usage PARAMS ((FILE *, int));
  64 static void slurp_symtab PARAMS ((bfd *));
  65 static void find_address_in_section PARAMS ((bfd *, asection *, PTR));
  66 static void translate_addresses PARAMS ((bfd *));
  67 static void process_file PARAMS ((const char *, const char *));
  68 \f
  69 /* Print a usage message to STREAM and exit with STATUS.  */
  70
  71 static void
  72 usage (stream, status)
  73      FILE *stream;
  74      int status;
  75 {
  76   fprintf (stream, _("\
  77 Usage: %s [-CfsHV] [-b bfdname] [--target=bfdname]\n\
  78        [-e executable] [--exe=executable] [--demangle]\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 bug-gnu-utils@gnu.org\n"));
  84   exit (status);
  85 }
  86 \f
  87 /* Read in the symbol table.  */
  88
  89 static void
  90 slurp_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 \f
 110 /* These global variables are used to pass information between
 111    translate_addresses and find_address_in_section.  */
 112
 113 static bfd_vma pc;
 114 static const char *filename;
 115 static const char *functionname;
 116 static unsigned int line;
 117 static boolean found;
 118
 119 /* Look for an address in a section.  This is called via
 120    bfd_map_over_sections.  */
 121
 122 static void
 123 find_address_in_section (abfd, section, data)
 124      bfd *abfd;
 125      asection *section;
 126      PTR data;
 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
 152 static void
 153 translate_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
 230 static void
 231 process_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 \f
 269 int
 270 main (argc, argv)
 271      int argc;
 272      char **argv;
 273 {
 274   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           break;
 305         case 'e':
 306           filename = optarg;
 307           break;
 308         case 's':
 309           base_names = true;
 310           break;
 311         case 'f':
 312           with_functions = true;
 313           break;
 314         case 'V':
 315           print_version ("addr2line");
 316           break;
 317         case 'H':
 318           usage (stdout, 0);
 319           break;
 320         default:
 321           usage (stderr, 1);
 322           break;
 323         }
 324     }
 325
 326   if (filename == NULL)
 327     filename = "a.out";
 328
 329   addr = argv + optind;
 330   naddr = argc - optind;
 331
 332   process_file (filename, target);
 333
 334   return 0;
 335 }