text: /* addr2line.c -- convert addresses to line number and function name
     Copyright 1997, 1998, 1999, 2000, 2001, 2002, 2003
     Free Software Foundation, Inc.
     Contributed by Ulrich Lauther <Ulrich.Lauther@mchp.siemens.de>
  
     This file is part of GNU Binutils.
  
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation; either version 2, or (at your option)
     any later version.
  
     This program is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU General Public License for more details.
  
     You should have received a copy of the GNU General Public License
     along with this program; if not, write to the Free Software
     Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  
  /* Derived from objdump.c and nm.c by Ulrich.Lauther@mchp.siemens.de
  
     Usage:
     addr2line [options] addr addr ...
     or
     addr2line [options]
  
     both forms write results to stdout, the second form reads addresses
     to be converted from stdin.  */
  
  #include <string.h>
  
  #include "bfd.h"
  #include "getopt.h"
  #include "libiberty.h"
  #include "demangle.h"
  #include "bucomm.h"
  #include "budemang.h"
  
  static bfd_boolean with_functions;	/* -f, show function names.  */
  static bfd_boolean do_demangle;		/* -C, demangle names.  */
  static bfd_boolean base_names;		/* -s, strip directory names.  */
  
  static int naddr;		/* Number of addresses to process.  */
  static char **addr;		/* Hex addresses to process.  */
  
  static asymbol **syms;		/* Symbol table.  */
  
  static struct option long_options[] =
  {
    {"basenames", no_argument, NULL, 's'},
    {"demangle", optional_argument, NULL, 'C'},
    {"exe", required_argument, NULL, 'e'},
    {"functions", no_argument, NULL, 'f'},
    {"target", required_argument, NULL, 'b'},
    {"help", no_argument, NULL, 'H'},
    {"version", no_argument, NULL, 'V'},
    {0, no_argument, 0, 0}
  };
  
  static void usage (FILE *, int);
  static void slurp_symtab (bfd *);
  static void find_address_in_section (bfd *, asection *, void *);
  static void translate_addresses (bfd *);
  static void process_file (const char *, const char *);
  
  /* Print a usage message to STREAM and exit with STATUS.  */
  
  static void
  usage (FILE *stream, int status)
  {
    fprintf (stream, _("Usage: %s [option(s)] [addr(s)]\n"), program_name);
    fprintf (stream, _(" Convert addresses into line number/file name pairs.\n"));
    fprintf (stream, _(" If no addresses are specified on the command line, they will be read from stdin\n"));
    fprintf (stream, _(" The options are:\n\
    -b --target=<bfdname>  Set the binary file format\n\
    -e --exe=<executable>  Set the input file name (default is a.out)\n\
    -s --basenames         Strip directory names\n\
    -f --functions         Show function names\n\
    -C --demangle[=style]  Demangle function names\n\
    -h --help              Display this information\n\
    -v --version           Display the program's version\n\
  \n"));
  
    list_supported_targets (program_name, stream);
    if (status == 0)
      fprintf (stream, _("Report bugs to %s\n"), REPORT_BUGS_TO);
    exit (status);
  }
  
  /* Read in the symbol table.  */
  
  static void
  slurp_symtab (bfd *abfd)
  {
    long symcount;
    unsigned int size;
  
    if ((bfd_get_file_flags (abfd) & HAS_SYMS) == 0)
      return;
  
    symcount = bfd_read_minisymbols (abfd, FALSE, (void *) &syms, &size);
    if (symcount == 0)
      symcount = bfd_read_minisymbols (abfd, TRUE /* dynamic */, (void *) &syms, &size);
  
    if (symcount < 0)
      bfd_fatal (bfd_get_filename (abfd));
  }
  
  /* These global variables are used to pass information between
     translate_addresses and find_address_in_section.  */
  
  static bfd_vma pc;
  static const char *filename;
  static const char *functionname;
  static unsigned int line;
  static bfd_boolean found;
  
  /* Look for an address in a section.  This is called via
     bfd_map_over_sections.  */
  
  static void
  find_address_in_section (bfd *abfd, asection *section,
  			 void *data ATTRIBUTE_UNUSED)
  {
    bfd_vma vma;
    bfd_size_type size;
  
    if (found)
      return;
  
    if ((bfd_get_section_flags (abfd, section) & SEC_ALLOC) == 0)
      return;
  
    vma = bfd_get_section_vma (abfd, section);
    if (pc < vma)
      return;
  
    size = bfd_get_section_size_before_reloc (section);
    if (pc >= vma + size)
      return;
  
    found = bfd_find_nearest_line (abfd, section, syms, pc - vma,
  				 &filename, &functionname, &line);
  }
  
  /* Read hexadecimal addresses from stdin, translate into
     file_name:line_number and optionally function name.  */
  
  static void
  translate_addresses (bfd *abfd)
  {
    int read_stdin = (naddr == 0);
  
    for (;;)
      {
        if (read_stdin)
  	{
  	  char addr_hex[100];
  
  	  if (fgets (addr_hex, sizeof addr_hex, stdin) == NULL)
  	    break;
  	  pc = bfd_scan_vma (addr_hex, NULL, 16);
  	}
        else
  	{
  	  if (naddr <= 0)
  	    break;
  	  --naddr;
  	  pc = bfd_scan_vma (*addr++, NULL, 16);
  	}
  
        found = FALSE;
        bfd_map_over_sections (abfd, find_address_in_section, NULL);
  
        if (! found)
  	{
  	  if (with_functions)
  	    printf ("??\n");
  	  printf ("??:0\n");
  	}
        else
  	{
  	  if (with_functions)
  	    {
  	      const char *name;
  	      char *alloc = NULL;
  
  	      name = functionname;
  	      if (name == NULL || *name == '\0')
  		name = "??";
  	      else if (do_demangle)
  		{
  		  alloc = demangle (abfd, name);
  		  name = alloc;
  		}
  
  	      printf ("%s\n", name);
  
  	      if (alloc != NULL)
  		free (alloc);
  	    }
  
  	  if (base_names && filename != NULL)
  	    {
  	      char *h;
  
  	      h = strrchr (filename, '/');
  	      if (h != NULL)
  		filename = h + 1;
  	    }
  
  	  printf ("%s:%u\n", filename ? filename : "??", line);
  	}
  
        /* fflush() is essential for using this command as a server
           child process that reads addresses from a pipe and responds
           with line number information, processing one address at a
           time.  */
        fflush (stdout);
      }
  }
  
  /* Process a file.  */
  
  static void
  process_file (const char *file_name, const char *target)
  {
    bfd *abfd;
    char **matching;
  
    if (get_file_size (file_name) < 1)
      return;
  
    abfd = bfd_openr (file_name, target);
    if (abfd == NULL)
      bfd_fatal (file_name);
  
    if (bfd_check_format (abfd, bfd_archive))
      fatal (_("%s: can not get addresses from archive"), file_name);
  
    if (! bfd_check_format_matches (abfd, bfd_object, &matching))
      {
        bfd_nonfatal (bfd_get_filename (abfd));
        if (bfd_get_error () == bfd_error_file_ambiguously_recognized)
  	{
  	  list_matching_formats (matching);
  	  free (matching);
  	}
        xexit (1);
      }
  
    slurp_symtab (abfd);
  
    translate_addresses (abfd);
  
    if (syms != NULL)
      {
        free (syms);
        syms = NULL;
      }
  
    bfd_close (abfd);
  }
  
  int main (int, char **);
  
  int
  main (int argc, char **argv)
  {
    const char *file_name;
    char *target;
    int c;
  
  #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
    setlocale (LC_MESSAGES, "");
  #endif
  #if defined (HAVE_SETLOCALE)
    setlocale (LC_CTYPE, "");
  #endif
    bindtextdomain (PACKAGE, LOCALEDIR);
    textdomain (PACKAGE);
  
    program_name = *argv;
    xmalloc_set_program_name (program_name);
  
    bfd_init ();
    set_default_bfd_target ();
  
    file_name = NULL;
    target = NULL;
    while ((c = getopt_long (argc, argv, "b:Ce:sfHhVv", long_options, (int *) 0))
  	 != EOF)
      {
        switch (c)
  	{
  	case 0:
  	  break;		/* We've been given a long option.  */
  	case 'b':
  	  target = optarg;
  	  break;
  	case 'C':
  	  do_demangle = TRUE;
  	  if (optarg != NULL)
  	    {
  	      enum demangling_styles style;
  
  	      style = cplus_demangle_name_to_style (optarg);
  	      if (style == unknown_demangling)
  		fatal (_("unknown demangling style `%s'"),
  		       optarg);
  
  	      cplus_demangle_set_style (style);
  	    }
  	  break;
  	case 'e':
  	  file_name = optarg;
  	  break;
  	case 's':
  	  base_names = TRUE;
  	  break;
  	case 'f':
  	  with_functions = TRUE;
  	  break;
  	case 'v':
  	case 'V':
  	  print_version ("addr2line");
  	  break;
  	case 'h':
  	case 'H':
  	  usage (stdout, 0);
  	  break;
  	default:
  	  usage (stderr, 1);
  	  break;
  	}
      }
  
    if (file_name == NULL)
      file_name = "a.out";
  
    addr = argv + optind;
    naddr = argc - optind;
  
    process_file (file_name, target);
  
    return 0;
  }
  