nm.c

基于4个mips核的noc设计

/* nm.c -- Describe symbol table of a rel file.
   Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
   2001
   Free Software Foundation, Inc.

   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 of the License, 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, Inc., 59 Temple Place - Suite 330, Boston, MA
   02111-1307, USA.  */

#include "bfd.h"
#include "progress.h"
#include "bucomm.h"
#include "getopt.h"
#include "aout/stab_gnu.h"
#include "aout/ranlib.h"
#include "demangle.h"
#include "libiberty.h"

/* When sorting by size, we use this structure to hold the size and a
   pointer to the minisymbol.  */

struct size_sym
{
  const PTR minisym;
  bfd_vma size;
};

/* When fetching relocs, we use this structure to pass information to
   get_relocs.  */

struct get_relocs_info
{
  asection **secs;
  arelent ***relocs;
  long *relcount;
  asymbol **syms;
};

static void
usage PARAMS ((FILE *, int));

static void
set_print_radix PARAMS ((char *));

static void
set_output_format PARAMS ((char *));

static void
display_archive PARAMS ((bfd *));

static boolean
display_file PARAMS ((char *filename));

static void
display_rel_file PARAMS ((bfd * file, bfd * archive));

static long
filter_symbols PARAMS ((bfd *, boolean, PTR, long, unsigned int));

static long
sort_symbols_by_size PARAMS ((bfd *, boolean, PTR, long, unsigned int,
			      struct size_sym **));

static void
print_symbols PARAMS ((bfd *, boolean, PTR, long, unsigned int, bfd *));

static void
print_size_symbols PARAMS ((bfd *, boolean, struct size_sym *, long, bfd *));

static void
print_symname PARAMS ((const char *, const char *, bfd *));

static void
print_symbol PARAMS ((bfd *, asymbol *, bfd *));

static void
print_symdef_entry PARAMS ((bfd * abfd));

/* The sorting functions.  */

static int
numeric_forward PARAMS ((const PTR, const PTR));

static int
numeric_reverse PARAMS ((const PTR, const PTR));

static int
non_numeric_forward PARAMS ((const PTR, const PTR));

static int
non_numeric_reverse PARAMS ((const PTR, const PTR));

static int
size_forward1 PARAMS ((const PTR, const PTR));

static int
size_forward2 PARAMS ((const PTR, const PTR));

/* The output formatting functions.  */

static void
print_object_filename_bsd PARAMS ((char *filename));

static void
print_object_filename_sysv PARAMS ((char *filename));

static void
print_object_filename_posix PARAMS ((char *filename));


static void
print_archive_filename_bsd PARAMS ((char *filename));

static void
print_archive_filename_sysv PARAMS ((char *filename));

static void
print_archive_filename_posix PARAMS ((char *filename));


static void
print_archive_member_bsd PARAMS ((char *archive, CONST char *filename));

static void
print_archive_member_sysv PARAMS ((char *archive, CONST char *filename));

static void
print_archive_member_posix PARAMS ((char *archive, CONST char *filename));


static void
print_symbol_filename_bsd PARAMS ((bfd * archive_bfd, bfd * abfd));

static void
print_symbol_filename_sysv PARAMS ((bfd * archive_bfd, bfd * abfd));

static void
print_symbol_filename_posix PARAMS ((bfd * archive_bfd, bfd * abfd));


static void
print_value PARAMS ((bfd_vma));

static void
print_symbol_info_bsd PARAMS ((symbol_info * info, bfd * abfd));

static void
print_symbol_info_sysv PARAMS ((symbol_info * info, bfd * abfd));

static void
print_symbol_info_posix PARAMS ((symbol_info * info, bfd * abfd));

static void
get_relocs PARAMS ((bfd *, asection *, PTR));

/* Support for different output formats.  */
struct output_fns
  {
    /* Print the name of an object file given on the command line.  */
    void (*print_object_filename) PARAMS ((char *filename));

    /* Print the name of an archive file given on the command line.  */
    void (*print_archive_filename) PARAMS ((char *filename));

    /* Print the name of an archive member file.  */
    void (*print_archive_member) PARAMS ((char *archive, CONST char *filename));

    /* Print the name of the file (and archive, if there is one)
       containing a symbol.  */
    void (*print_symbol_filename) PARAMS ((bfd * archive_bfd, bfd * abfd));

    /* Print a line of information about a symbol.  */
    void (*print_symbol_info) PARAMS ((symbol_info * info, bfd * abfd));
  };
static struct output_fns formats[] =
{
  {print_object_filename_bsd,
   print_archive_filename_bsd,
   print_archive_member_bsd,
   print_symbol_filename_bsd,
   print_symbol_info_bsd},
  {print_object_filename_sysv,
   print_archive_filename_sysv,
   print_archive_member_sysv,
   print_symbol_filename_sysv,
   print_symbol_info_sysv},
  {print_object_filename_posix,
   print_archive_filename_posix,
   print_archive_member_posix,
   print_symbol_filename_posix,
   print_symbol_info_posix}
};

/* Indices in `formats'.  */
#define FORMAT_BSD 0
#define FORMAT_SYSV 1
#define FORMAT_POSIX 2
#define FORMAT_DEFAULT FORMAT_BSD

/* The output format to use.  */
static struct output_fns *format = &formats[FORMAT_DEFAULT];


/* Command options.  */

static int do_demangle = 0;	/* Pretty print C++ symbol names.  */
static int external_only = 0;	/* print external symbols only */
static int defined_only = 0;	/* Print defined symbols only */
static int no_sort = 0;		/* don't sort; print syms in order found */
static int print_debug_syms = 0;	/* print debugger-only symbols too */
static int print_armap = 0;	/* describe __.SYMDEF data in archive files.  */
static int reverse_sort = 0;	/* sort in downward(alpha or numeric) order */
static int sort_numerically = 0;	/* sort in numeric rather than alpha order */
static int sort_by_size = 0;	/* sort by size of symbol */
static int undefined_only = 0;	/* print undefined symbols only */
static int dynamic = 0;		/* print dynamic symbols.  */
static int show_version = 0;	/* show the version number */
static int show_stats = 0;	/* show statistics */
static int line_numbers = 0;	/* print line numbers for symbols */

/* When to print the names of files.  Not mutually exclusive in SYSV format.  */
static int filename_per_file = 0;	/* Once per file, on its own line.  */
static int filename_per_symbol = 0;	/* Once per symbol, at start of line.  */

/* Print formats for printing a symbol value.  */
#ifndef BFD64
static char value_format[] = "%08lx";
#else
#if BFD_HOST_64BIT_LONG
static char value_format[] = "%016lx";
#else
/* We don't use value_format for this case.  */
#endif
#endif
static int print_radix = 16;
/* Print formats for printing stab info.  */
static char other_format[] = "%02x";
static char desc_format[] = "%04x";

static char *target = NULL;

/* Used to cache the line numbers for a BFD.  */
static bfd *lineno_cache_bfd;
static bfd *lineno_cache_rel_bfd;

#define OPTION_TARGET 200

static struct option long_options[] =
{
  {"debug-syms", no_argument, &print_debug_syms, 1},
  {"demangle", optional_argument, 0, 'C'},
  {"dynamic", no_argument, &dynamic, 1},
  {"extern-only", no_argument, &external_only, 1},
  {"format", required_argument, 0, 'f'},
  {"help", no_argument, 0, 'h'},
  {"line-numbers", no_argument, 0, 'l'},
  {"no-cplus", no_argument, &do_demangle, 0},  /* Linux compatibility.  */
  {"no-demangle", no_argument, &do_demangle, 0},
  {"no-sort", no_argument, &no_sort, 1},
  {"numeric-sort", no_argument, &sort_numerically, 1},
  {"portability", no_argument, 0, 'P'},
  {"print-armap", no_argument, &print_armap, 1},
  {"print-file-name", no_argument, 0, 'o'},
  {"radix", required_argument, 0, 't'},
  {"reverse-sort", no_argument, &reverse_sort, 1},
  {"size-sort", no_argument, &sort_by_size, 1},
  {"stats", no_argument, &show_stats, 1},
  {"target", required_argument, 0, OPTION_TARGET},
  {"defined-only", no_argument, &defined_only, 1},
  {"undefined-only", no_argument, &undefined_only, 1},
  {"version", no_argument, &show_version, 1},
  {0, no_argument, 0, 0}
};

/* Some error-reporting functions */

static void
usage (stream, status)
     FILE *stream;
     int status;
{
  fprintf (stream, _("Usage: %s [OPTION]... [FILE]...\n"), program_name);
  fprintf (stream, _("List symbols from FILEs (a.out by default).\n"));
  fprintf (stream, _("\n\
  -a, --debug-syms       Display debugger-only symbols\n\
  -A, --print-file-name  Print name of the input file before every symbol\n\
  -B                     Same as --format=bsd\n\
  -C, --demangle[=STYLE] Decode low-level symbol names into user-level names\n\
                          The STYLE, if specified, can be `auto' (the default),\n\
                          `gnu', 'lucid', 'arm', 'hp', 'edg' or 'gnu-new-abi'\n\
      --no-demangle      Do not demangle low-level symbol names\n\
  -D, --dynamic          Display dynamic symbols instead of normal symbols\n\
      --defined-only     Display only defined symbols\n\
  -e                     (ignored)\n\
  -f, --format=FORMAT    Use the output format FORMAT.  FORMAT can be `bsd',\n\
                           `sysv' or `posix'.  The default is `bsd'\n\
  -g, --extern-only      Display only external symbols\n\
  -h, --help             Display this information\n\
  -l, --line-numbers     Use debugging information to find a filename and\n\
                           line number for each symbol\n\
  -n, --numeric-sort     Sort symbols numerically by address\n\
  -o                     Same as -A\n\
  -p, --no-sort          Do not sort the symbols\n\
  -P, --portability      Same as --format=posix\n\
  -r, --reverse-sort     Reverse the sense of the sort\n\
  -s, --print-armap      Include index for symbols from archive members\n\
      --size-sort        Sort symbols by size\n\
  -t, --radix=RADIX      Use RADIX for printing symbol values\n\
      --target=BFDNAME   Specify the target object format as BFDNAME\n\
  -u, --undefined-only   Display only undefined symbols\n\
  -V, --version          Display this program's version number\n\
  -X 32_64               (ignored)\n\
\n"));
  list_supported_targets (program_name, stream);
  if (status == 0)
    fprintf (stream, _("Report bugs to %s.\n"), REPORT_BUGS_TO);
  exit (status);
}

/* Set the radix for the symbol value and size according to RADIX.  */

static void
set_print_radix (radix)
     char *radix;
{
  switch (*radix)
    {
    case 'x':
      break;
    case 'd':
    case 'o':
      if (*radix == 'd')
	print_radix = 10;
      else
	print_radix = 8;
#ifndef BFD64
      value_format[4] = *radix;
#else
#if BFD_HOST_64BIT_LONG
      value_format[5] = *radix;
#else
      /* This case requires special handling for octal and decimal
         printing.  */
#endif
#endif
      other_format[3] = desc_format[3] = *radix;
      break;
    default:
      fatal (_("%s: invalid radix"), radix);
    }
}

static void
set_output_format (f)
     char *f;
{
  int i;

  switch (*f)
    {
    case 'b':
    case 'B':
      i = FORMAT_BSD;
      break;
    case 'p':
    case 'P':
      i = FORMAT_POSIX;
      break;
    case 's':
    case 'S':
      i = FORMAT_SYSV;
      break;
    default:
      fatal (_("%s: invalid output format"), f);
    }
  format = &formats[i];
}

int
main (argc, argv)
     int argc;
     char **argv;
{
  int c;
  int retval;

#if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
  setlocale (LC_MESSAGES, "");
#endif
  bindtextdomain (PACKAGE, LOCALEDIR);
  textdomain (PACKAGE);

  program_name = *argv;
  xmalloc_set_program_name (program_name);

  START_PROGRESS (program_name, 0);

  bfd_init ();
  set_default_bfd_target ();

  while ((c = getopt_long (argc, argv, "aABCDef:glnopPrst:uvVX:",
			   long_options, (int *) 0)) != EOF)
    {
      switch (c)
	{
	case 'a':
	  print_debug_syms = 1;
	  break;
	case 'A':
	case 'o':
	  filename_per_symbol = 1;
	  break;
	case 'B':		/* For MIPS compatibility.  */
	  set_output_format ("bsd");
	  break;
	case 'C':
	  do_demangle = 1;
	  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 'D':
	  dynamic = 1;
	  break;
	case 'e':
	  /* Ignored for HP/UX compatibility.  */
	  break;
	case 'f':
	  set_output_format (optarg);
	  break;
	case 'g':
	  external_only = 1;
	  break;
	case 'h':
	  usage (stdout, 0);
	case 'l':
	  line_numbers = 1;
	  break;
	case 'n':
	case 'v':
	  sort_numerically = 1;
	  break;
	case 'p':
	  no_sort = 1;
	  break;
	case 'P':
	  set_output_format ("posix");
	  break;
	case 'r':
	  reverse_sort = 1;
	  break;
	case 's':
	  print_armap = 1;
	  break;
	case 't':
	  set_print_radix (optarg);
	  break;
	case 'u':
	  undefined_only = 1;
	  break;
	case 'V':
	  show_version = 1;
	  break;
	case 'X':
	  /* Ignored for (partial) AIX compatibility.  On AIX, the
	     argument has values 32, 64, or 32_64, and specfies that
	     only 32-bit, only 64-bit, or both kinds of objects should
	     be examined.  The default is 32.  So plain AIX nm on a
	     library archive with both kinds of objects will ignore
	     the 64-bit ones.  For GNU nm, the default is and always
	     has been -X 32_64, and other options are not supported.  */
	  if (strcmp (optarg, "32_64") != 0)
	    fatal (_("Only -X 32_64 is supported"));
	  break;

	case OPTION_TARGET:	/* --target */
	  target = optarg;
	  break;

	case 0:		/* A long option that just sets a flag.  */
	  break;

	default:
	  usage (stderr, 1);
	}
    }

  if (show_version)
    print_version ("nm");

  /* OK, all options now parsed.  If no filename specified, do a.out.  */
  if (optind == argc)
    return !display_file ("a.out");

  retval = 0;

  if (argc - optind > 1)
    filename_per_file = 1;

  /* We were given several filenames to do.  */
  while (optind < argc)
    {
      PROGRESS (1);
      if (!display_file (argv[optind++]))
	retval++;
    }

  END_PROGRESS (program_name);

#ifdef HAVE_SBRK
  if (show_stats)
    {
      char *lim = (char *) sbrk (0);