1 /* nm.c -- Describe symbol table of a rel file.
2 Copyright (C) 1991 Free Software Foundation, Inc.
4 This file is part of GNU Binutils.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
23 #include "aout/stab_gnu.h"
28 PROTO(static boolean
, display_file
, (char *filename
));
29 PROTO(static void, do_one_rel_file
, (bfd
*file
));
30 PROTO(static unsigned int, filter_symbols
, (bfd
*file
, asymbol
**syms
,
31 unsigned long symcount
));
33 PROTO(static void, print_symbols
, (bfd
*file
, asymbol
**syms
,
34 unsigned long symcount
));
35 extern PROTO(int, (*sorters
[2][2]), (char *x
, char *y
));
36 PROTO(static void, print_symdef_entry
, (bfd
* abfd
));
38 /* Command options. */
40 int external_only
= 0; /* print external symbols only */
41 int file_on_each_line
= 0; /* print file name on each line */
42 int no_sort
= 0; /* don't sort; print syms in order found */
43 int print_debug_syms
= 0; /* print debugger-only symbols too */
44 int print_armap
= 0; /* describe __.SYMDEF data in archive files. */
45 int reverse_sort
= 0; /* sort in downward(alpha or numeric) order */
46 int sort_numerically
= 0; /* sort in numeric rather than alpha order */
47 int undefined_only
= 0; /* print undefined symbols only */
49 boolean print_each_filename
= false; /* Ick. Used in archives. */
52 extern char *program_name
;
53 extern char *program_version
;
56 struct option long_options
[] = {
57 {"debug-syms", 0, &print_debug_syms
, 1},
58 {"extern-only", 0, &external_only
, 1},
59 {"no-sort", 0, &no_sort
, 1},
60 {"numeric-sort", 0, &sort_numerically
, 1},
61 {"print-armap", 0, &print_armap
, 1},
62 {"print-file-name", 0, &file_on_each_line
, 1},
63 {"reverse-sort", 0, &reverse_sort
, 1},
64 {"target", 2, (int *)NULL
, 0},
65 {"undefined-only", 0, &undefined_only
, 1},
71 /* Some error-reporting functions */
76 fprintf(stderr
, "nm %s\nUsage: %s [-agnoprsu] filename...\n",
77 program_version
, program_name
);
86 int c
; /* sez which option char */
87 int ind
= 0; /* used by getopt and ignored by us */
88 extern int optind
; /* steps thru options */
94 while ((c
= getopt_long(argc
, argv
, "agnoprsu", long_options
, &ind
)) != EOF
) {
96 case 'a': print_debug_syms
= 1; break;
97 case 'g': external_only
= 1; break;
98 case 'n': sort_numerically
= 1; break;
99 case 'o': file_on_each_line
= 1; break;
100 case 'p': no_sort
= 1; break;
101 case 'r': reverse_sort
= 1; break;
102 case 's': print_armap
= 1; break;
103 case 'u': undefined_only
= 1; break;
106 if (!strcmp("target",(long_options
[option_index
]).name
)) {
110 break; /* we've been given a long option */
117 /* Strangely, for the shell you should return only a nonzero value
118 on sucess -- the inverse of the C sense. */
120 /* OK, all options now parsed. If no filename specified, do a.out. */
121 if (optind
== argc
) return !display_file ("a.out");
124 show_names
= (argc
-optind
)>1;
125 /* We were given several filenames to do: */
126 while (optind
< argc
) {
127 if (!display_file (argv
[optind
++])) {
135 /** Display a file's stats */
137 /* goto here is marginally cleaner than the nested if syntax */
140 display_file (filename
)
143 boolean retval
= true;
147 file
= bfd_openr(filename
, target
);
149 fprintf (stderr
, "\n%s: can't open '%s'.\n", program_name
, filename
);
156 if (bfd_check_format(file
, bfd_object
))
159 printf ("\n%s:\n",filename
);
161 do_one_rel_file (file
);
164 else if (bfd_check_format (file
, bfd_archive
)) {
165 if (!bfd_check_format (file
, bfd_archive
)) {
166 fprintf (stderr
, "%s: %s: unknown format.\n", program_name
, filename
);
171 printf("\n%s:\n", filename
);
172 if (print_armap
) print_symdef_entry (file
);
174 arfile
= bfd_openr_next_archived_file (file
, arfile
);
176 if (arfile
== NULL
) {
177 if (bfd_error
!= no_more_archived_files
)
178 bfd_fatal (filename
);
182 if (!bfd_check_format(arfile
, bfd_object
))
183 printf("%s: not an object file\n", arfile
->filename
);
185 printf ("\n%s:\n", arfile
->filename
);
186 do_one_rel_file (arfile
) ;
191 fprintf (stderr
, "\n%s: %s: unknown format.\n", program_name
, filename
);
197 if (bfd_close(file
) == false)
198 bfd_fatal (filename
);
205 do_one_rel_file (abfd
)
208 unsigned int storage
;
210 unsigned int symcount
= 0;
212 if (!(bfd_get_file_flags (abfd
) & HAS_SYMS
)) {
213 (void) printf ("No symbols in \"%s\".\n", bfd_get_filename (abfd
));
218 storage
= get_symtab_upper_bound (abfd
);
221 fprintf (stderr
, "%s: Symflags set but there are none?\n",
222 bfd_get_filename (abfd
));
226 syms
= (asymbol
**) xmalloc (storage
);
228 symcount
= bfd_canonicalize_symtab (abfd
, syms
);
229 if (symcount
== 0) goto nosymz
;
231 /* Discard the symbols we don't want to print.
232 It's OK to do this in place; we'll free the storage anyway
235 symcount
= filter_symbols (abfd
, syms
, symcount
);
238 qsort((char *) syms
, symcount
, sizeof (asymbol
*),
239 sorters
[sort_numerically
][reverse_sort
]);
241 if (print_each_filename
&& !file_on_each_line
)
242 printf("\n%s:\n", bfd_get_filename(abfd
));
244 print_symbols (abfd
, syms
, symcount
);
249 /* Symbol-sorting predicates */
250 #define valueof(x) ((x)->section ? (x)->section->vma + (x)->value : (x)->value)
252 numeric_forward (x
, y
)
257 return (valueof(*(asymbol
**)x
) - valueof(*(asymbol
**) y
));;
261 numeric_reverse (x
, y
)
265 return (valueof(*(asymbol
**)y
) - valueof(*(asymbol
**) x
));
270 non_numeric_forward (x
, y
)
274 CONST
char *xn
= (*(asymbol
**) x
)->name
;
275 CONST
char *yn
= (*(asymbol
**) y
)->name
;
277 return ((xn
== NULL
) ? ((yn
== NULL
) ? 0 : -1) :
278 ((yn
== NULL
) ? 1 : strcmp (xn
, yn
)));
282 non_numeric_reverse (x
, y
)
286 return -(non_numeric_forward (x
, y
));
289 int (*sorters
[2][2])() = {
290 {non_numeric_forward
, non_numeric_reverse
},
291 {numeric_forward
, numeric_reverse
},
295 /* Choose which symbol entries to print;
296 compact them downward to get rid of the rest.
297 Return the number of symbols to be printed. */
299 filter_symbols (abfd
, syms
, symcount
)
302 unsigned long symcount
;
304 asymbol
**from
, **to
;
305 unsigned int dst_count
= 0;
306 unsigned int src_count
;
307 for (from
= to
= syms
, src_count
= 0; src_count
<symcount
; src_count
++) {
309 flagword flags
= (from
[src_count
])->flags
;
311 if (undefined_only
) {
312 keep
= (flags
& BSF_UNDEFINED
);
313 } else if (external_only
) {
314 keep
= ((flags
& BSF_GLOBAL
) || (flags
& BSF_UNDEFINED
) ||
315 (flags
& BSF_FORT_COMM
));
320 if (!print_debug_syms
&& ((flags
& BSF_DEBUGGING
) != 0)) {
325 to
[dst_count
++] = from
[src_count
];
333 print_symbols (abfd
, syms
, symcount
)
336 unsigned long symcount
;
338 asymbol
**sym
= syms
, **end
= syms
+ symcount
;
341 for (; sym
< end
; ++sym
) {
342 if (file_on_each_line
) printf("%s:", bfd_get_filename(abfd
));
344 if (undefined_only
) {
345 if ((*sym
)->flags
& BSF_UNDEFINED
)
351 bfd_print_symbol(abfd
, stdout
, p
, bfd_print_symbol_nm
);
359 print_symdef_entry (abfd
)
362 symindex idx
= BFD_NO_MORE_SYMBOLS
;
364 boolean everprinted
= false;
366 for (idx
= bfd_get_next_mapent (abfd
, idx
, &thesym
);
367 idx
!= BFD_NO_MORE_SYMBOLS
;
368 idx
= bfd_get_next_mapent (abfd
, idx
, &thesym
)) {
371 printf ("\nArchive index:\n");
374 elt
= bfd_get_elt_at_index (abfd
, idx
);
375 if (thesym
->name
!= (char *)NULL
) {
376 printf ("%s in %s\n", thesym
->name
, bfd_get_filename (elt
));