binutils/addr2line.c

   1 /* addr2line.c -- convert addresses to line number and function name
   2    Copyright 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
   3    Contributed by Ulrich Lauther <Ulrich.Lauther@mchp.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@mchp.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 <string.h>
  32
  33 #include "bfd.h"
  34 #include "getopt.h"
  35 #include "libiberty.h"
  36 #include "demangle.h"
  37 #include "bucomm.h"
  38
  39 static boolean with_functions;  /* -f, show function names.  */
  40 static boolean do_demangle;     /* -C, demangle names.  */
  41 static boolean base_names;      /* -s, strip directory names.  */
  42
  43 static int naddr;               /* Number of addresses to process.  */
  44 static char **addr;             /* Hex addresses to process.  */
  45
  46 static asymbol **syms;          /* Symbol table.  */
  47
  48 static struct option long_options[] =
  49 {
  50   {"basenames", no_argument, NULL, 's'},
  51   {"demangle", optional_argument, NULL, 'C'},
  52   {"exe", required_argument, NULL, 'e'},
  53   {"functions", no_argument, NULL, 'f'},
  54   {"target", required_argument, NULL, 'b'},
  55   {"help", no_argument, NULL, 'H'},
  56   {"version", no_argument, NULL, 'V'},
  57   {0, no_argument, 0, 0}
  58 };
  59
  60 static void usage PARAMS ((FILE *, int));
  61 static void slurp_symtab PARAMS ((bfd *));
  62 static void find_address_in_section PARAMS ((bfd *, asection *, PTR));
  63 static void translate_addresses PARAMS ((bfd *));
  64 static void process_file PARAMS ((const char *, const char *));
  65 \f
  66 /* Print a usage message to STREAM and exit with STATUS.  */
  67
  68 static void
  69 usage (stream, status)
  70      FILE *stream;
  71      int status;
  72 {
  73   fprintf (stream, _("\
  74 Usage: %s [-CfsHV] [-b bfdname] [--target=bfdname]\n\
  75        [-e executable] [--exe=executable] [--demangle[=style]]\n\
  76        [--basenames] [--functions] [addr addr ...]\n"),
  77            program_name);
  78   list_supported_targets (program_name, stream);
  79   if (status == 0)
  80     fprintf (stream, _("Report bugs to %s\n"), REPORT_BUGS_TO);
  81   exit (status);
  82 }
  83 \f
  84 /* Read in the symbol table.  */
  85
  86 static void
  87 slurp_symtab (abfd)
  88      bfd *abfd;
  89 {
  90   long storage;
  91   long symcount;
  92
  93   if ((bfd_get_file_flags (abfd) & HAS_SYMS) == 0)
  94     return;
  95
  96   storage = bfd_get_symtab_upper_bound (abfd);
  97   if (storage < 0)
  98     bfd_fatal (bfd_get_filename (abfd));
  99
 100   syms = (asymbol **) xmalloc (storage);
 101
 102   symcount = bfd_canonicalize_symtab (abfd, syms);
 103   if (symcount < 0)
 104     bfd_fatal (bfd_get_filename (abfd));
 105 }
 106 \f
 107 /* These global variables are used to pass information between
 108    translate_addresses and find_address_in_section.  */
 109
 110 static bfd_vma pc;
 111 static const char *filename;
 112 static const char *functionname;
 113 static unsigned int line;
 114 static boolean found;
 115
 116 /* Look for an address in a section.  This is called via
 117    bfd_map_over_sections.  */
 118
 119 static void
 120 find_address_in_section (abfd, section, data)
 121      bfd *abfd;
 122      asection *section;
 123      PTR data ATTRIBUTE_UNUSED;
 124 {
 125   bfd_vma vma;
 126   bfd_size_type size;
 127
 128   if (found)
 129     return;
 130
 131   if ((bfd_get_section_flags (abfd, section) & SEC_ALLOC) == 0)
 132     return;
 133
 134   vma = bfd_get_section_vma (abfd, section);
 135   if (pc < vma)
 136     return;
 137
 138   size = bfd_get_section_size_before_reloc (section);
 139   if (pc >= vma + size)
 140     return;
 141
 142   found = bfd_find_nearest_line (abfd, section, syms, pc - vma,
 143                                  &filename, &functionname, &line);
 144 }
 145
 146 /* Read hexadecimal addresses from stdin, translate into
 147    file_name:line_number and optionally function name.  */
 148
 149 static void
 150 translate_addresses (abfd)
 151      bfd *abfd;
 152 {
 153   int read_stdin = (naddr == 0);
 154
 155   for (;;)
 156     {
 157       if (read_stdin)
 158         {
 159           char addr_hex[100];
 160
 161           if (fgets (addr_hex, sizeof addr_hex, stdin) == NULL)
 162             break;
 163           pc = bfd_scan_vma (addr_hex, NULL, 16);
 164         }
 165       else
 166         {
 167           if (naddr <= 0)
 168             break;
 169           --naddr;
 170           pc = bfd_scan_vma (*addr++, NULL, 16);
 171         }
 172
 173       found = false;
 174       bfd_map_over_sections (abfd, find_address_in_section, (PTR) NULL);
 175
 176       if (! found)
 177         {
 178           if (with_functions)
 179             printf ("??\n");
 180           printf ("??:0\n");
 181         }
 182       else
 183         {
 184           if (with_functions)
 185             {
 186               if (functionname == NULL || *functionname == '\0')
 187                 printf ("??\n");
 188               else if (! do_demangle)
 189                 printf ("%s\n", functionname);
 190               else
 191                 {
 192                   char *res;
 193
 194                   res = cplus_demangle (functionname, DMGL_ANSI | DMGL_PARAMS);
 195                   if (res == NULL)
 196                     printf ("%s\n", functionname);
 197                   else
 198                     {
 199                       printf ("%s\n", res);
 200                       free (res);
 201                     }
 202                 }
 203             }
 204
 205           if (base_names && filename != NULL)
 206             {
 207               char *h;
 208
 209               h = strrchr (filename, '/');
 210               if (h != NULL)
 211                 filename = h + 1;
 212             }
 213
 214           printf ("%s:%u\n", filename ? filename : "??", line);
 215         }
 216
 217       /* fflush() is essential for using this command as a server
 218          child process that reads addresses from a pipe and responds
 219          with line number information, processing one address at a
 220          time.  */
 221       fflush (stdout);
 222     }
 223 }
 224
 225 /* Process a file.  */
 226
 227 static void
 228 process_file (filename, target)
 229      const char *filename;
 230      const char *target;
 231 {
 232   bfd *abfd;
 233   char **matching;
 234
 235   abfd = bfd_openr (filename, target);
 236   if (abfd == NULL)
 237     bfd_fatal (filename);
 238
 239   if (bfd_check_format (abfd, bfd_archive))
 240     fatal (_("%s: can not get addresses from archive"), filename);
 241
 242   if (! bfd_check_format_matches (abfd, bfd_object, &matching))
 243     {
 244       bfd_nonfatal (bfd_get_filename (abfd));
 245       if (bfd_get_error () == bfd_error_file_ambiguously_recognized)
 246         {
 247           list_matching_formats (matching);
 248           free (matching);
 249         }
 250       xexit (1);
 251     }
 252
 253   slurp_symtab (abfd);
 254
 255   translate_addresses (abfd);
 256
 257   if (syms != NULL)
 258     {
 259       free (syms);
 260       syms = NULL;
 261     }
 262
 263   bfd_close (abfd);
 264 }
 265 \f
 266 int
 267 main (argc, argv)
 268      int argc;
 269      char **argv;
 270 {
 271   const char *filename;
 272   char *target;
 273   int c;
 274
 275 #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
 276   setlocale (LC_MESSAGES, "");
 277 #endif
 278 #if defined (HAVE_SETLOCALE)
 279   setlocale (LC_CTYPE, "");
 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           if (optarg != NULL)
 305             {
 306               enum demangling_styles style;
 307
 308               style = cplus_demangle_name_to_style (optarg);
 309               if (style == unknown_demangling)
 310                 fatal (_("unknown demangling style `%s'"),
 311                        optarg);
 312
 313               cplus_demangle_set_style (style);
 314            }
 315           break;
 316         case 'e':
 317           filename = optarg;
 318           break;
 319         case 's':
 320           base_names = true;
 321           break;
 322         case 'f':
 323           with_functions = true;
 324           break;
 325         case 'V':
 326           print_version ("addr2line");
 327           break;
 328         case 'H':
 329           usage (stdout, 0);
 330           break;
 331         default:
 332           usage (stderr, 1);
 333           break;
 334         }
 335     }
 336
 337   if (filename == NULL)
 338     filename = "a.out";
 339
 340   addr = argv + optind;
 341   naddr = argc - optind;
 342
 343   process_file (filename, target);
 344
 345   return 0;
 346 }