contrib/elftoolchain/nm/nm.c

   1 /*-
   2  * Copyright (c) 2007 Hyogeol Lee <hyogeollee@gmail.com>
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer
  10  *    in this position and unchanged.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
  16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  25  */
  26
  27 #include <sys/queue.h>
  28 #include <sys/types.h>
  29 #include <sys/stat.h>
  30 #include <ar.h>
  31 #include <assert.h>
  32 #include <ctype.h>
  33 #include <dwarf.h>
  34 #include <err.h>
  35 #include <errno.h>
  36 #include <fcntl.h>
  37 #include <gelf.h>
  38 #include <getopt.h>
  39 #include <inttypes.h>
  40 #include <libdwarf.h>
  41 #include <libelftc.h>
  42 #include <stdbool.h>
  43 #include <stdio.h>
  44 #include <stdlib.h>
  45 #include <string.h>
  46 #include <strings.h>
  47 #include <unistd.h>
  48
  49 #include "_elftc.h"
  50
  51 ELFTC_VCSID("$Id: nm.c 3145 2015-02-15 18:04:37Z emaste $");
  52
  53 /* symbol information list */
  54 STAILQ_HEAD(sym_head, sym_entry);
  55
  56 struct sym_entry {
  57         char            *name;
  58         GElf_Sym        *sym;
  59         STAILQ_ENTRY(sym_entry) sym_entries;
  60 };
  61
  62 typedef int (*fn_sort)(const void *, const void *);
  63 typedef void (*fn_elem_print)(char, const char *, const GElf_Sym *, const char *);
  64 typedef void (*fn_sym_print)(const GElf_Sym *);
  65 typedef int (*fn_filter)(char, const GElf_Sym *, const char *);
  66
  67 /* output filter list */
  68 static SLIST_HEAD(filter_head, filter_entry) nm_out_filter =
  69     SLIST_HEAD_INITIALIZER(nm_out_filter);
  70
  71 struct filter_entry {
  72         fn_filter       fn;
  73         SLIST_ENTRY(filter_entry) filter_entries;
  74 };
  75
  76 struct sym_print_data {
  77         struct sym_head *headp;
  78         size_t          sh_num, list_num;
  79         const char      *t_table, **s_table, *filename, *objname;
  80 };
  81
  82 struct nm_prog_info {
  83         const char      *name;
  84         const char      *def_filename;
  85 };
  86
  87 /* List for line number information. */
  88 struct line_info_entry {
  89         uint64_t        addr;   /* address */
  90         uint64_t        line;   /* line number */
  91         char            *file;  /* file name with path */
  92         SLIST_ENTRY(line_info_entry) entries;
  93 };
  94 SLIST_HEAD(line_info_head, line_info_entry);
  95
  96 /* List for function line number information. */
  97 struct func_info_entry {
  98         char            *name;  /* function name */
  99         char            *file;  /* file name with path */
 100         uint64_t        lowpc;  /* low address */
 101         uint64_t        highpc; /* high address */
 102         uint64_t        line;   /* line number */
 103         SLIST_ENTRY(func_info_entry) entries;
 104 };
 105 SLIST_HEAD(func_info_head, func_info_entry);
 106
 107 /* List for variable line number information. */
 108 struct var_info_entry {
 109         char            *name;  /* variable name */
 110         char            *file;  /* file name with path */
 111         uint64_t        addr;   /* address */
 112         uint64_t        line;   /* line number */
 113         SLIST_ENTRY(var_info_entry) entries;
 114 };
 115 SLIST_HEAD(var_info_head, var_info_entry);
 116
 117 /* output numric type */
 118 enum radix {
 119         RADIX_OCT,
 120         RADIX_HEX,
 121         RADIX_DEC
 122 };
 123
 124 /* output symbol type, PRINT_SYM_DYN for dynamic symbol only */
 125 enum print_symbol {
 126         PRINT_SYM_SYM,
 127         PRINT_SYM_DYN
 128 };
 129
 130 /* output name type */
 131 enum print_name {
 132         PRINT_NAME_NONE,
 133         PRINT_NAME_FULL,
 134         PRINT_NAME_MULTI
 135 };
 136
 137 struct nm_prog_options {
 138         enum print_symbol       print_symbol;
 139         enum print_name         print_name;
 140         enum radix              t;
 141         int                     demangle_type;
 142         bool                    print_debug;
 143         bool                    print_armap;
 144         int                     print_size;
 145         bool                    debug_line;
 146         int                     def_only;
 147         bool                    undef_only;
 148         int                     sort_size;
 149         bool                    sort_reverse;
 150         int                     no_demangle;
 151
 152         /*
 153          * function pointer to sort symbol list.
 154          * possible function - cmp_name, cmp_none, cmp_size, cmp_value
 155          */
 156         fn_sort                 sort_fn;
 157
 158         /*
 159          * function pointer to print symbol elem.
 160          * possible function - sym_elem_print_all
 161          *                     sym_elem_print_all_portable
 162          *                     sym_elem_print_all_sysv
 163          */
 164         fn_elem_print           elem_print_fn;
 165
 166         fn_sym_print            value_print_fn;
 167         fn_sym_print            size_print_fn;
 168 };
 169
 170 #define CHECK_SYM_PRINT_DATA(p) (p->headp == NULL || p->sh_num == 0 ||        \
 171 p->t_table == NULL || p->s_table == NULL || p->filename == NULL)
 172 #define IS_SYM_TYPE(t)          ((t) == '?' || isalpha((t)) != 0)
 173 #define IS_UNDEF_SYM_TYPE(t)    ((t) == 'U' || (t) == 'v' || (t) == 'w')
 174 #define UNUSED(p)               ((void)p)
 175
 176 static int              cmp_name(const void *, const void *);
 177 static int              cmp_none(const void *, const void *);
 178 static int              cmp_size(const void *, const void *);
 179 static int              cmp_value(const void *, const void *);
 180 static void             filter_dest(void);
 181 static int              filter_insert(fn_filter);
 182 static void             get_opt(int, char **);
 183 static int              get_sym(Elf *, struct sym_head *, int, size_t, size_t,
 184                             const char *, const char **, int);
 185 static const char *     get_sym_name(Elf *, const GElf_Sym *, size_t,
 186                             const char **, int);
 187 static char             get_sym_type(const GElf_Sym *, const char *);
 188 static void             global_dest(void);
 189 static void             global_init(void);
 190 static bool             is_sec_data(GElf_Shdr *);
 191 static bool             is_sec_debug(const char *);
 192 static bool             is_sec_nobits(GElf_Shdr *);
 193 static bool             is_sec_readonly(GElf_Shdr *);
 194 static bool             is_sec_text(GElf_Shdr *);
 195 static void             print_ar_index(int, Elf *);
 196 static void             print_header(const char *, const char *);
 197 static void             print_version(void);
 198 static int              read_elf(Elf *, const char *, Elf_Kind);
 199 static int              read_object(const char *);
 200 static int              read_files(int, char **);
 201 static void             set_opt_value_print_fn(enum radix);
 202 static int              sym_elem_def(char, const GElf_Sym *, const char *);
 203 static int              sym_elem_global(char, const GElf_Sym *, const char *);
 204 static int              sym_elem_global_static(char, const GElf_Sym *,
 205                             const char *);
 206 static int              sym_elem_nondebug(char, const GElf_Sym *, const char *);
 207 static int              sym_elem_nonzero_size(char, const GElf_Sym *,
 208                             const char *);
 209 static void             sym_elem_print_all(char, const char *,
 210                             const GElf_Sym *, const char *);
 211 static void             sym_elem_print_all_portable(char, const char *,
 212                             const GElf_Sym *, const char *);
 213 static void             sym_elem_print_all_sysv(char, const char *,
 214                             const GElf_Sym *, const char *);
 215 static int              sym_elem_undef(char, const GElf_Sym *, const char *);
 216 static void             sym_list_dest(struct sym_head *);
 217 static int              sym_list_insert(struct sym_head *, const char *,
 218                             const GElf_Sym *);
 219 static void             sym_list_print(struct sym_print_data *,
 220                             struct func_info_head *, struct var_info_head *,
 221                             struct line_info_head *);
 222 static void             sym_list_print_each(struct sym_entry *,
 223                             struct sym_print_data *, struct func_info_head *,
 224                             struct var_info_head *, struct line_info_head *);
 225 static struct sym_entry *sym_list_sort(struct sym_print_data *);
 226 static void             sym_size_oct_print(const GElf_Sym *);
 227 static void             sym_size_hex_print(const GElf_Sym *);
 228 static void             sym_size_dec_print(const GElf_Sym *);
 229 static void             sym_value_oct_print(const GElf_Sym *);
 230 static void             sym_value_hex_print(const GElf_Sym *);
 231 static void             sym_value_dec_print(const GElf_Sym *);
 232 static void             usage(int);
 233
 234 static struct nm_prog_info      nm_info;
 235 static struct nm_prog_options   nm_opts;
 236 static int                      nm_elfclass;
 237
 238 /*
 239  * Point to current sym_print_data to use portable qsort function.
 240  *  (e.g. There is no qsort_r function in NetBSD.)
 241  *
 242  * Using in sym_list_sort.
 243  */
 244 static struct sym_print_data    *nm_print_data;
 245
 246 static const struct option nm_longopts[] = {
 247         { "debug-syms",         no_argument,            NULL,           'a' },
 248         { "defined-only",       no_argument,            &nm_opts.def_only, 1},
 249         { "demangle",           optional_argument,      NULL,           'C' },
 250         { "dynamic",            no_argument,            NULL,           'D' },
 251         { "extern-only",        no_argument,            NULL,           'g' },
 252         { "format",             required_argument,      NULL,           'F' },
 253         { "help",               no_argument,            NULL,           'h' },
 254         { "line-numbers",       no_argument,            NULL,           'l' },
 255         { "no-demangle",        no_argument,            &nm_opts.no_demangle,
 256           1},
 257         { "no-sort",            no_argument,            NULL,           'p' },
 258         { "numeric-sort",       no_argument,            NULL,           'v' },
 259         { "print-armap",        no_argument,            NULL,           's' },
 260         { "print-file-name",    no_argument,            NULL,           'A' },
 261         { "print-size",         no_argument,            NULL,           'S' },
 262         { "radix",              required_argument,      NULL,           't' },
 263         { "reverse-sort",       no_argument,            NULL,           'r' },
 264         { "size-sort",          no_argument,            &nm_opts.sort_size, 1},
 265         { "undefined-only",     no_argument,            NULL,           'u' },
 266         { "version",            no_argument,            NULL,           'V' },
 267         { NULL,                 0,                      NULL,           0   }
 268 };
 269
 270 #if defined(ELFTC_NEED_BYTEORDER_EXTENSIONS)
 271 static __inline uint32_t
 272 be32dec(const void *pp)
 273 {
 274         unsigned char const *p = (unsigned char const *)pp;
 275
 276         return ((p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3]);
 277 }
 278
 279 static __inline uint32_t
 280 le32dec(const void *pp)
 281 {
 282         unsigned char const *p = (unsigned char const *)pp;
 283
 284         return ((p[3] << 24) | (p[2] << 16) | (p[1] << 8) | p[0]);
 285 }
 286
 287 static __inline uint64_t
 288 be64dec(const void *pp)
 289 {
 290         unsigned char const *p = (unsigned char const *)pp;
 291
 292         return (((uint64_t)be32dec(p) << 32) | be32dec(p + 4));
 293 }
 294
 295 static __inline uint64_t
 296 le64dec(const void *pp)
 297 {
 298         unsigned char const *p = (unsigned char const *)pp;
 299
 300         return (((uint64_t)le32dec(p + 4) << 32) | le32dec(p));
 301 }
 302 #endif
 303
 304 static int
 305 cmp_name(const void *l, const void *r)
 306 {
 307
 308         assert(l != NULL);
 309         assert(r != NULL);
 310         assert(((const struct sym_entry *)l)->name != NULL);
 311         assert(((const struct sym_entry *)r)->name != NULL);
 312
 313         return (strcmp(((const struct sym_entry *)l)->name,
 314             ((const struct sym_entry *)r)->name));
 315 }
 316
 317 static int
 318 cmp_none(const void *l, const void *r)
 319 {
 320
 321         UNUSED(l);
 322         UNUSED(r);
 323
 324         return (0);
 325 }
 326
 327 /* Size comparison. If l and r have same size, compare their name. */
 328 static int
 329 cmp_size(const void *lp, const void *rp)
 330 {
 331         const struct sym_entry *l, *r;
 332
 333         l = lp;
 334         r = rp;
 335
 336         assert(l != NULL);
 337         assert(l->name != NULL);
 338         assert(l->sym != NULL);
 339         assert(r != NULL);
 340         assert(r->name != NULL);
 341         assert(r->sym != NULL);
 342
 343         if (l->sym->st_size == r->sym->st_size)
 344                 return (strcmp(l->name, r->name));
 345
 346         return (l->sym->st_size - r->sym->st_size);
 347 }
 348
 349 /* Value comparison. Undefined symbols come first. */
 350 static int
 351 cmp_value(const void *lp, const void *rp)
 352 {
 353         const struct sym_entry *l, *r;
 354         const char *ttable;
 355         int l_is_undef, r_is_undef;
 356
 357         l = lp;
 358         r = rp;
 359
 360         assert(nm_print_data != NULL);
 361         ttable = nm_print_data->t_table;
 362
 363         assert(l != NULL);
 364         assert(l->name != NULL);
 365         assert(l->sym != NULL);
 366         assert(r != NULL);
 367         assert(r->name != NULL);
 368         assert(r->sym != NULL);
 369         assert(ttable != NULL);
 370
 371         l_is_undef = IS_UNDEF_SYM_TYPE(get_sym_type(l->sym, ttable)) ? 1 : 0;
 372         r_is_undef = IS_UNDEF_SYM_TYPE(get_sym_type(r->sym, ttable)) ? 1 : 0;
 373
 374         assert(l_is_undef + r_is_undef >= 0);
 375         assert(l_is_undef + r_is_undef <= 2);
 376
 377         switch (l_is_undef + r_is_undef) {
 378         case 0:
 379                 /* Both defined */
 380                 if (l->sym->st_value == r->sym->st_value)
 381                         return (strcmp(l->name, r->name));
 382                 return (l->sym->st_value - r->sym->st_value);
 383         case 1:
 384                 /* One undefined */
 385                 return (l_is_undef == 0 ? 1 : -1);
 386         case 2:
 387                 /* Both undefined */
 388                 return (strcmp(l->name, r->name));
 389         }
 390         /* NOTREACHED */
 391
 392         return (l->sym->st_value - r->sym->st_value);
 393 }
 394
 395 static void
 396 filter_dest(void)
 397 {
 398         struct filter_entry *e;
 399
 400         while (!SLIST_EMPTY(&nm_out_filter)) {
 401                 e = SLIST_FIRST(&nm_out_filter);
 402                 SLIST_REMOVE_HEAD(&nm_out_filter, filter_entries);
 403                 free(e);
 404         }
 405 }
 406
 407 static int
 408 filter_insert(fn_filter filter_fn)
 409 {
 410         struct filter_entry *e;
 411
 412         assert(filter_fn != NULL);
 413
 414         if ((e = malloc(sizeof(struct filter_entry))) == NULL) {
 415                 warn("malloc");
 416                 return (0);
 417         }
 418         e->fn = filter_fn;
 419         SLIST_INSERT_HEAD(&nm_out_filter, e, filter_entries);
 420
 421         return (1);
 422 }
 423
 424 static int
 425 parse_demangle_option(const char *opt)
 426 {
 427
 428         if (opt == NULL)
 429                 return (ELFTC_DEM_UNKNOWN);
 430         else if (!strncasecmp(opt, "gnu-v2", 6))
 431                 return (ELFTC_DEM_GNU2);
 432         else if (!strncasecmp(opt, "gnu-v3", 6))
 433                 return (ELFTC_DEM_GNU3);
 434         else if (!strncasecmp(opt, "arm", 3))
 435                 return (ELFTC_DEM_ARM);
 436         else
 437                 errx(EXIT_FAILURE, "unknown demangling style '%s'", opt);
 438
 439         /* NOTREACHED */
 440         return (0);
 441 }
 442
 443 static void
 444 get_opt(int argc, char **argv)
 445 {
 446         int ch;
 447         bool is_posix, oflag;
 448
 449         if (argc <= 0 || argv == NULL)
 450                 return;
 451
 452         oflag = is_posix = false;
 453         nm_opts.t = RADIX_HEX;
 454         while ((ch = getopt_long(argc, argv, "ABCDF:PSVaefghlnoprst:uvx",
 455                     nm_longopts, NULL)) != -1) {
 456                 switch (ch) {
 457                 case 'A':
 458                         nm_opts.print_name = PRINT_NAME_FULL;
 459                         break;
 460                 case 'B':
 461                         nm_opts.elem_print_fn = &sym_elem_print_all;
 462                         break;
 463                 case 'C':
 464                         nm_opts.demangle_type = parse_demangle_option(optarg);
 465                         break;
 466                 case 'D':
 467                         nm_opts.print_symbol = PRINT_SYM_DYN;
 468                         break;
 469                 case 'F':
 470                         /* sysv, bsd, posix */
 471                         switch (optarg[0]) {
 472                         case 'B':
 473                         case 'b':
 474                                 nm_opts.elem_print_fn = &sym_elem_print_all;
 475                                 break;
 476                         case 'P':
 477                         case 'p':
 478                                 is_posix = true;
 479                                 nm_opts.elem_print_fn =
 480                                     &sym_elem_print_all_portable;
 481                                 break;
 482                         case 'S':
 483                         case 's':
 484                                 nm_opts.elem_print_fn =
 485                                     &sym_elem_print_all_sysv;
 486                                 break;
 487                         default:
 488                                 warnx("%s: Invalid format", optarg);
 489                                 usage(1);
 490                         }
 491
 492                         break;
 493                 case 'P':
 494                         is_posix = true;
 495                         nm_opts.elem_print_fn = &sym_elem_print_all_portable;
 496                         break;
 497                 case 'S':
 498                         nm_opts.print_size = 1;
 499                         break;
 500                 case 'V':
 501                         print_version();
 502                         /* NOTREACHED */
 503                 case 'a':
 504                         nm_opts.print_debug = true;
 505                         break;
 506                 case 'e':
 507                         filter_insert(sym_elem_global_static);
 508                         break;
 509                 case 'f':
 510                         break;
 511                 case 'g':
 512                         filter_insert(sym_elem_global);
 513                         break;
 514                 case 'h':
 515                         usage(0);
 516                         break;
 517                 case 'l':
 518                         nm_opts.debug_line = true;
 519                         break;
 520                 case 'n':
 521                 case 'v':
 522                         nm_opts.sort_fn = &cmp_value;
 523                         break;
 524                 case 'o':
 525                         oflag = true;
 526                         break;
 527                 case 'p':
 528                         nm_opts.sort_fn = &cmp_none;
 529                         break;
 530                 case 'r':
 531                         nm_opts.sort_reverse = true;
 532                         break;
 533                 case 's':
 534                         nm_opts.print_armap = true;
 535                         break;
 536                 case 't':
 537                         /* t require always argument to getopt_long */
 538                         switch (optarg[0]) {
 539                         case 'd':
 540                                 nm_opts.t = RADIX_DEC;
 541                                 break;
 542                         case 'o':
 543                                 nm_opts.t = RADIX_OCT;
 544                                 break;
 545                         case 'x':
 546                                 nm_opts.t = RADIX_HEX;
 547                                 break;
 548                         default:
 549                                 warnx("%s: Invalid radix", optarg);
 550                                 usage(1);
 551                         }
 552                         break;
 553                 case 'u':
 554                         filter_insert(sym_elem_undef);
 555                         nm_opts.undef_only = true;
 556                         break;
 557                 /* case 'v': see case 'n' above. */
 558                 case 'x':
 559                         nm_opts.t = RADIX_HEX;
 560                         break;
 561                 case 0:
 562                         if (nm_opts.sort_size != 0) {
 563                                 nm_opts.sort_fn = &cmp_size;
 564                                 filter_insert(sym_elem_def);
 565                                 filter_insert(sym_elem_nonzero_size);
 566                         }
 567                         if (nm_opts.def_only != 0)
 568                                 filter_insert(sym_elem_def);
 569                         if (nm_opts.no_demangle != 0)
 570                                 nm_opts.demangle_type = -1;
 571                         break;
 572                 default :
 573                         usage(1);
 574                 }
 575         }
 576
 577         /*
 578          * In POSIX mode, the '-o' option controls the output radix.
 579          * In non-POSIX mode, the option is a synonym for the '-A' and
 580          * '--print-file-name' options.
 581          */
 582         if (oflag) {
 583                 if (is_posix)
 584                         nm_opts.t = RADIX_OCT;
 585                 else
 586                         nm_opts.print_name = PRINT_NAME_FULL;
 587         }
 588
 589         assert(nm_opts.sort_fn != NULL && "nm_opts.sort_fn is null");
 590         assert(nm_opts.elem_print_fn != NULL &&
 591             "nm_opts.elem_print_fn is null");
 592         assert(nm_opts.value_print_fn != NULL &&
 593             "nm_opts.value_print_fn is null");
 594
 595         set_opt_value_print_fn(nm_opts.t);
 596
 597         if (nm_opts.undef_only == true) {
 598                 if (nm_opts.sort_fn == &cmp_size)
 599                         errx(EXIT_FAILURE,
 600                             "--size-sort with -u is meaningless");
 601                 if (nm_opts.def_only != 0)
 602                         errx(EXIT_FAILURE,
 603                             "-u with --defined-only is meaningless");
 604         }
 605         if (nm_opts.print_debug == false)
 606                 filter_insert(sym_elem_nondebug);
 607         if (nm_opts.sort_reverse == true && nm_opts.sort_fn == cmp_none)
 608                 nm_opts.sort_reverse = false;
 609 }
 610
 611 /*
 612  * Get symbol information from elf.
 613  */
 614 static int
 615 get_sym(Elf *elf, struct sym_head *headp, int shnum, size_t dynndx,
 616     size_t strndx, const char *type_table, const char **sec_table,
 617     int sec_table_size)
 618 {
 619         Elf_Scn *scn;
 620         Elf_Data *data;
 621         GElf_Shdr shdr;
 622         GElf_Sym sym;
 623         struct filter_entry *fep;
 624         size_t ndx;
 625         int rtn;
 626         const char *sym_name;
 627         char type;
 628         bool filter;
 629         int i, j;
 630
 631         assert(elf != NULL);
 632         assert(headp != NULL);
 633
 634         rtn = 0;
 635         for (i = 1; i < shnum; i++) {
 636                 if ((scn = elf_getscn(elf, i)) == NULL) {
 637                         warnx("elf_getscn failed: %s", elf_errmsg(-1));
 638                         continue;
 639                 }
 640                 if (gelf_getshdr(scn, &shdr) != &shdr) {
 641                         warnx("gelf_getshdr failed: %s", elf_errmsg(-1));
 642                         continue;
 643                 }
 644                 if (shdr.sh_type == SHT_SYMTAB) {
 645                         if (nm_opts.print_symbol != PRINT_SYM_SYM)
 646                                 continue;
 647                 } else if (shdr.sh_type == SHT_DYNSYM) {
 648                         if (nm_opts.print_symbol != PRINT_SYM_DYN)
 649                                 continue;
 650                 } else
 651                         continue;
 652
 653                 ndx = shdr.sh_type == SHT_DYNSYM ? dynndx : strndx;
 654
 655                 data = NULL;
 656                 while ((data = elf_getdata(scn, data)) != NULL) {
 657                         j = 1;
 658                         while (gelf_getsym(data, j++, &sym) != NULL) {
 659                                 sym_name = get_sym_name(elf, &sym, ndx,
 660                                     sec_table, sec_table_size);
 661                                 filter = false;
 662                                 type = get_sym_type(&sym, type_table);
 663                                 SLIST_FOREACH(fep, &nm_out_filter,
 664                                     filter_entries) {
 665                                         if (!fep->fn(type, &sym, sym_name)) {
 666                                                 filter = true;
 667                                                 break;
 668                                         }
 669                                 }
 670                                 if (filter == false) {
 671                                         if (sym_list_insert(headp, sym_name,
 672                                             &sym) == 0)
 673                                                 return (0);
 674                                         rtn++;
 675                                 }
 676                         }
 677                 }
 678         }
 679
 680         return (rtn);
 681 }
 682
 683 static const char *
 684 get_sym_name(Elf *elf, const GElf_Sym *sym, size_t ndx, const char **sec_table,
 685     int sec_table_size)
 686 {
 687         const char *sym_name;
 688
 689         sym_name = NULL;
 690
 691         /* Show section name as symbol name for STT_SECTION symbols. */
 692         if (GELF_ST_TYPE(sym->st_info) == STT_SECTION) {
 693                 if (sec_table != NULL && sym->st_shndx < sec_table_size)
 694                         sym_name = sec_table[sym->st_shndx];
 695         } else
 696                 sym_name = elf_strptr(elf, ndx, sym->st_name);
 697
 698         if (sym_name == NULL)
 699                 sym_name = "(null)";
 700
 701         return (sym_name);
 702 }
 703
 704 static char
 705 get_sym_type(const GElf_Sym *sym, const char *type_table)
 706 {
 707         bool is_local;
 708
 709         if (sym == NULL || type_table == NULL)
 710                 return ('?');
 711
 712         is_local = sym->st_info >> 4 == STB_LOCAL;
 713
 714         if (sym->st_shndx == SHN_ABS) /* absolute */
 715                 return (is_local ? 'a' : 'A');
 716
 717         if (sym->st_shndx == SHN_COMMON) /* common */
 718                 return ('C');
 719
 720         if ((sym->st_info) >> 4 == STB_WEAK) { /* weak */
 721                 if ((sym->st_info & 0xf) == STT_OBJECT)
 722                         return (sym->st_shndx == SHN_UNDEF ? 'v' : 'V');
 723
 724                 return (sym->st_shndx == SHN_UNDEF ? 'w' : 'W');
 725         }
 726
 727         if (sym->st_shndx == SHN_UNDEF) /* undefined */
 728                 return ('U');
 729
 730         return (is_local == true && type_table[sym->st_shndx] != 'N' ?
 731             tolower((unsigned char) type_table[sym->st_shndx]) :
 732             type_table[sym->st_shndx]);
 733 }
 734
 735 static void
 736 global_dest(void)
 737 {
 738
 739         filter_dest();
 740 }
 741
 742 static void
 743 global_init(void)
 744 {
 745
 746         if (elf_version(EV_CURRENT) == EV_NONE)
 747                 errx(EXIT_FAILURE, "elf_version error");
 748
 749         nm_info.name = ELFTC_GETPROGNAME();
 750         nm_info.def_filename = "a.out";
 751         nm_opts.print_symbol = PRINT_SYM_SYM;
 752         nm_opts.print_name = PRINT_NAME_NONE;
 753         nm_opts.demangle_type = -1;
 754         nm_opts.print_debug = false;
 755         nm_opts.print_armap = false;
 756         nm_opts.print_size = 0;
 757         nm_opts.debug_line = false;
 758         nm_opts.def_only = 0;
 759         nm_opts.undef_only = false;
 760         nm_opts.sort_size = 0;
 761         nm_opts.sort_reverse = false;
 762         nm_opts.no_demangle = 0;
 763         nm_opts.sort_fn = &cmp_name;
 764         nm_opts.elem_print_fn = &sym_elem_print_all;
 765         nm_opts.value_print_fn = &sym_value_dec_print;
 766         nm_opts.size_print_fn = &sym_size_dec_print;
 767         SLIST_INIT(&nm_out_filter);
 768 }
 769
 770 static bool
 771 is_sec_data(GElf_Shdr *s)
 772 {
 773
 774         assert(s != NULL && "shdr is NULL");
 775
 776         return (((s->sh_flags & SHF_ALLOC) != 0) && s->sh_type != SHT_NOBITS);
 777 }
 778
 779 static bool
 780 is_sec_debug(const char *shname)
 781 {
 782         const char *dbg_sec[] = {
 783                 ".debug",
 784                 ".gnu.linkonce.wi.",
 785                 ".line",
 786                 ".rel.debug",
 787                 ".rela.debug",
 788                 ".stab",
 789                 NULL
 790         };
 791         const char **p;
 792
 793         assert(shname != NULL && "shname is NULL");
 794
 795         for (p = dbg_sec; *p; p++) {
 796                 if (!strncmp(shname, *p, strlen(*p)))
 797                         return (true);
 798         }
 799
 800         return (false);
 801 }
 802
 803 static bool
 804 is_sec_nobits(GElf_Shdr *s)
 805 {
 806
 807         assert(s != NULL && "shdr is NULL");
 808
 809         return (s->sh_type == SHT_NOBITS);
 810 }
 811
 812 static bool
 813 is_sec_readonly(GElf_Shdr *s)
 814 {
 815
 816         assert(s != NULL && "shdr is NULL");
 817
 818         return ((s->sh_flags & SHF_WRITE) == 0);
 819 }
 820
 821 static bool
 822 is_sec_text(GElf_Shdr *s)
 823 {
 824
 825         assert(s != NULL && "shdr is NULL");
 826
 827         return ((s->sh_flags & SHF_EXECINSTR) != 0);
 828 }
 829
 830 static void
 831 print_ar_index(int fd, Elf *arf)
 832 {
 833         Elf *elf;
 834         Elf_Arhdr *arhdr;
 835         Elf_Arsym *arsym;
 836         Elf_Cmd cmd;
 837         off_t start;
 838         size_t arsym_size;
 839
 840         if (arf == NULL)
 841                 return;
 842
 843         if ((arsym = elf_getarsym(arf, &arsym_size)) == NULL)
 844                 return;
 845
 846         printf("\nArchive index:\n");
 847
 848         start = arsym->as_off;
 849         cmd = ELF_C_READ;
 850         while (arsym_size > 1) {
 851                 if (elf_rand(arf, arsym->as_off) == arsym->as_off &&
 852                     (elf = elf_begin(fd, cmd, arf)) != NULL) {
 853                         if ((arhdr = elf_getarhdr(elf)) != NULL)
 854                                 printf("%s in %s\n", arsym->as_name,
 855                                     arhdr->ar_name != NULL ?
 856                                     arhdr->ar_name : arhdr->ar_rawname);
 857                         elf_end(elf);
 858                 }
 859                 ++arsym;
 860                 --arsym_size;
 861         }
 862
 863         elf_rand(arf, start);
 864 }
 865
 866 #define DEMANGLED_BUFFER_SIZE   (8 * 1024)
 867 #define PRINT_DEMANGLED_NAME(FORMAT, NAME) do {                         \
 868         char _demangled[DEMANGLED_BUFFER_SIZE];                         \
 869         if (nm_opts.demangle_type < 0 ||                                \
 870             elftc_demangle((NAME), _demangled, sizeof(_demangled),      \
 871                 nm_opts.demangle_type) < 0)                             \
 872                 printf((FORMAT), (NAME));                               \
 873         else                                                            \
 874                 printf((FORMAT), _demangled);                           \
 875         } while (0)
 876
 877 static void
 878 print_header(const char *file, const char *obj)
 879 {
 880
 881         if (file == NULL)
 882                 return;
 883
 884         if (nm_opts.elem_print_fn == &sym_elem_print_all_sysv) {
 885                 printf("\n\n%s from %s",
 886                     nm_opts.undef_only == false ? "Symbols" :
 887                     "Undefined symbols", file);
 888                 if (obj != NULL)
 889                         printf("[%s]", obj);
 890                 printf(":\n\n");
 891
 892                 printf("\
 893 Name                  Value           Class        Type         Size             Line  Section\n\n");
 894         } else {
 895                 /* archive file without -A option and POSIX */
 896                 if (nm_opts.print_name != PRINT_NAME_FULL && obj != NULL) {
 897                         if (nm_opts.elem_print_fn ==
 898                             sym_elem_print_all_portable)
 899                                 printf("%s[%s]:\n", file, obj);
 900                         else if (nm_opts.elem_print_fn == sym_elem_print_all)
 901                                 printf("\n%s:\n", obj);
 902                         /* multiple files(not archive) without -A option */
 903                 } else if (nm_opts.print_name == PRINT_NAME_MULTI) {
 904                         if (nm_opts.elem_print_fn == sym_elem_print_all)
 905                                 printf("\n");
 906                         printf("%s:\n", file);
 907                 }
 908         }
 909 }
 910
 911 static void
 912 print_version(void)
 913 {
 914
 915         (void) printf("%s (%s)\n", nm_info.name, elftc_version());
 916         exit(0);
 917 }
 918
 919 static uint64_t
 920 get_block_value(Dwarf_Debug dbg, Dwarf_Block *block)
 921 {
 922         Elf *elf;
 923         GElf_Ehdr eh;
 924         Dwarf_Error de;
 925
 926         if (dwarf_get_elf(dbg, &elf, &de) != DW_DLV_OK) {
 927                 warnx("dwarf_get_elf failed: %s", dwarf_errmsg(de));
 928                 return (0);
 929         }
 930
 931         if (gelf_getehdr(elf, &eh) != &eh) {
 932                 warnx("gelf_getehdr failed: %s", elf_errmsg(-1));
 933                 return (0);
 934         }
 935
 936         if (block->bl_len == 5) {
 937                 if (eh.e_ident[EI_DATA] == ELFDATA2LSB)
 938                         return (le32dec((uint8_t *) block->bl_data + 1));
 939                 else
 940                         return (be32dec((uint8_t *) block->bl_data + 1));
 941         } else if (block->bl_len == 9) {
 942                 if (eh.e_ident[EI_DATA] == ELFDATA2LSB)
 943                         return (le64dec((uint8_t *) block->bl_data + 1));
 944                 else
 945                         return (be64dec((uint8_t *) block->bl_data + 1));
 946         }
 947
 948         return (0);
 949 }
 950
 951 static void
 952 search_line_attr(Dwarf_Debug dbg, struct func_info_head *func_info,
 953     struct var_info_head *var_info, Dwarf_Die die, char **src_files,
 954     Dwarf_Signed filecount)
 955 {
 956         Dwarf_Attribute at;
 957         Dwarf_Unsigned udata;
 958         Dwarf_Half tag;
 959         Dwarf_Block *block;
 960         Dwarf_Bool flag;
 961         Dwarf_Die ret_die;
 962         Dwarf_Error de;
 963         struct func_info_entry *func;
 964         struct var_info_entry *var;
 965         const char *str;
 966         int ret;
 967
 968         if (dwarf_tag(die, &tag, &de) != DW_DLV_OK) {
 969                 warnx("dwarf_tag failed: %s", dwarf_errmsg(de));
 970                 goto cont_search;
 971         }
 972
 973         /* We're interested in DIEs which define functions or variables. */
 974         if (tag != DW_TAG_subprogram && tag != DW_TAG_entry_point &&
 975             tag != DW_TAG_inlined_subroutine && tag != DW_TAG_variable)
 976                 goto cont_search;
 977
 978         if (tag == DW_TAG_variable) {
 979
 980                 /* Ignore "artificial" variable. */
 981                 if (dwarf_attrval_flag(die, DW_AT_artificial, &flag, &de) ==
 982                     DW_DLV_OK && flag)
 983                         goto cont_search;
 984
 985                 /* Ignore pure declaration. */
 986                 if (dwarf_attrval_flag(die, DW_AT_declaration, &flag, &de) ==
 987                     DW_DLV_OK && flag)
 988                         goto cont_search;
 989
 990                 /* Ignore stack varaibles. */
 991                 if (dwarf_attrval_flag(die, DW_AT_external, &flag, &de) !=
 992                     DW_DLV_OK || !flag)
 993                         goto cont_search;
 994
 995                 if ((var = calloc(1, sizeof(*var))) == NULL) {
 996                         warn("calloc failed");
 997                         goto cont_search;
 998                 }
 999
1000                 if (dwarf_attrval_unsigned(die, DW_AT_decl_file, &udata,
1001                     &de) == DW_DLV_OK && udata > 0 &&
1002                     (Dwarf_Signed) (udata - 1) < filecount) {
1003                         var->file = strdup(src_files[udata - 1]);
1004                         if (var->file == NULL) {
1005                                 warn("strdup");
1006                                 free(var);
1007                                 goto cont_search;
1008                         }
1009                 }
1010
1011                 if (dwarf_attrval_unsigned(die, DW_AT_decl_line, &udata, &de) ==
1012                     DW_DLV_OK)
1013                         var->line = udata;
1014
1015                 if (dwarf_attrval_string(die, DW_AT_name, &str, &de) ==
1016                     DW_DLV_OK) {
1017                         var->name = strdup(str);
1018                         if (var->name == NULL) {
1019                                 warn("strdup");
1020                                 if (var->file)
1021                                         free(var->file);
1022                                 free(var);
1023                                 goto cont_search;
1024                         }
1025                 }
1026
1027                 if (dwarf_attr(die, DW_AT_location, &at, &de) == DW_DLV_OK &&
1028                     dwarf_formblock(at, &block, &de) == DW_DLV_OK) {
1029                         /*
1030                          * Since we ignored stack variables, the rest are the
1031                          * external varaibles which should always use DW_OP_addr
1032                          * operator for DW_AT_location value.
1033                          */
1034                         if (*((uint8_t *)block->bl_data) == DW_OP_addr)
1035                                 var->addr = get_block_value(dbg, block);
1036                 }
1037
1038                 SLIST_INSERT_HEAD(var_info, var, entries);
1039
1040         } else {
1041
1042                 if ((func = calloc(1, sizeof(*func))) == NULL) {
1043                         warn("calloc failed");
1044                         goto cont_search;
1045                 }
1046
1047                 /*
1048                  * Note that dwarf_attrval_unsigned() handles DW_AT_abstract_origin
1049                  * internally, so it can retrieve DW_AT_decl_file/DW_AT_decl_line
1050                  * attributes for inlined functions as well.
1051                  */
1052                 if (dwarf_attrval_unsigned(die, DW_AT_decl_file, &udata,
1053                     &de) == DW_DLV_OK && udata > 0 &&
1054                     (Dwarf_Signed) (udata - 1) < filecount) {
1055                         func->file = strdup(src_files[udata - 1]);
1056                         if (func->file == NULL) {
1057                                 warn("strdup");
1058                                 free(func);
1059                                 goto cont_search;
1060                         }
1061                 }
1062
1063                 if (dwarf_attrval_unsigned(die, DW_AT_decl_line, &udata, &de) ==
1064                     DW_DLV_OK)
1065                         func->line = udata;
1066
1067                 if (dwarf_attrval_string(die, DW_AT_name, &str, &de) ==
1068                     DW_DLV_OK) {
1069                         func->name = strdup(str);
1070                         if (func->name == NULL) {
1071                                 warn("strdup");
1072                                 if (func->file)
1073                                         free(func->file);
1074                                 free(func);
1075                                 goto cont_search;
1076                         }
1077                 }
1078
1079                 if (dwarf_attrval_unsigned(die, DW_AT_low_pc, &udata, &de) ==
1080                     DW_DLV_OK)
1081                         func->lowpc = udata;
1082                 if (dwarf_attrval_unsigned(die, DW_AT_high_pc, &udata, &de) ==
1083                     DW_DLV_OK)
1084                         func->highpc = udata;
1085
1086                 SLIST_INSERT_HEAD(func_info, func, entries);
1087         }
1088
1089 cont_search:
1090
1091         /* Search children. */
1092         ret = dwarf_child(die, &ret_die, &de);
1093         if (ret == DW_DLV_ERROR)
1094                 warnx("dwarf_child: %s", dwarf_errmsg(de));
1095         else if (ret == DW_DLV_OK)
1096                 search_line_attr(dbg, func_info, var_info, ret_die, src_files,
1097                     filecount);
1098
1099         /* Search sibling. */
1100         ret = dwarf_siblingof(dbg, die, &ret_die, &de);
1101         if (ret == DW_DLV_ERROR)
1102                 warnx("dwarf_siblingof: %s", dwarf_errmsg(de));
1103         else if (ret == DW_DLV_OK)
1104                 search_line_attr(dbg, func_info, var_info, ret_die, src_files,
1105                     filecount);
1106
1107         dwarf_dealloc(dbg, die, DW_DLA_DIE);
1108 }
1109
1110 /*
1111  * Read elf file and collect symbol information, sort them, print.
1112  * Return 1 at failed, 0 at success.
1113  */
1114 static int
1115 read_elf(Elf *elf, const char *filename, Elf_Kind kind)
1116 {
1117         Dwarf_Debug dbg;
1118         Dwarf_Die die;
1119         Dwarf_Error de;
1120         Dwarf_Half tag;
1121         Elf_Arhdr *arhdr;
1122         Elf_Scn *scn;
1123         GElf_Shdr shdr;
1124         GElf_Half i;
1125         Dwarf_Line *lbuf;
1126         Dwarf_Unsigned lineno;
1127         Dwarf_Signed lcount, filecount;
1128         Dwarf_Addr lineaddr;
1129         struct sym_print_data p_data;
1130         struct sym_head list_head;
1131         struct line_info_head *line_info;
1132         struct func_info_head *func_info;
1133         struct var_info_head *var_info;
1134         struct line_info_entry *lie;
1135         struct func_info_entry *func;
1136         struct var_info_entry *var;
1137         const char *shname, *objname;
1138         char *type_table, **sec_table, *sfile, **src_files;
1139         size_t shstrndx, shnum, dynndx, strndx;
1140         int ret, rtn, e_err;
1141
1142 #define OBJNAME (objname == NULL ? filename : objname)
1143
1144         assert(filename != NULL && "filename is null");
1145
1146         STAILQ_INIT(&list_head);
1147         type_table = NULL;
1148         sec_table = NULL;
1149         line_info = NULL;
1150         func_info = NULL;
1151         var_info = NULL;
1152         objname = NULL;
1153         dynndx = SHN_UNDEF;
1154         strndx = SHN_UNDEF;
1155         rtn = 0;
1156
1157         nm_elfclass = gelf_getclass(elf);
1158
1159         if (kind == ELF_K_AR) {
1160                 if ((arhdr = elf_getarhdr(elf)) == NULL)
1161                         goto next_cmd;
1162                 objname = arhdr->ar_name != NULL ? arhdr->ar_name :
1163                     arhdr->ar_rawname;
1164         }
1165         if (!elf_getshnum(elf, &shnum)) {
1166                 if ((e_err = elf_errno()) != 0)
1167                         warnx("%s: %s", OBJNAME, elf_errmsg(e_err));
1168                 else
1169                         warnx("%s: cannot get section number", OBJNAME);
1170                 rtn = 1;
1171                 goto next_cmd;
1172         }
1173         if (shnum == 0) {
1174                 warnx("%s: has no section", OBJNAME);
1175                 rtn = 1;
1176                 goto next_cmd;
1177         }
1178         if (!elf_getshstrndx(elf, &shstrndx)) {
1179                 warnx("%s: cannot get str index", OBJNAME);
1180                 rtn = 1;
1181                 goto next_cmd;
1182         }
1183         /* type_table for type determine */
1184         if ((type_table = malloc(sizeof(char) * shnum)) == NULL) {
1185                 warn("%s: malloc", OBJNAME);
1186                 rtn = 1;
1187                 goto next_cmd;
1188         }
1189         /* sec_table for section name to display in sysv format */
1190         if ((sec_table = calloc(shnum, sizeof(char *))) == NULL) {
1191                 warn("%s: calloc", OBJNAME);
1192                 rtn = 1;
1193                 goto next_cmd;
1194         }
1195
1196         type_table[0] = 'U';
1197         if ((sec_table[0] = strdup("*UND*")) == NULL) {
1198                 warn("strdup");
1199                 goto next_cmd;
1200         }
1201
1202         for (i = 1; i < shnum; ++i) {
1203                 type_table[i] = 'U';
1204                 if ((scn = elf_getscn(elf, i)) == NULL) {
1205                         if ((e_err = elf_errno()) != 0)
1206                                 warnx("%s: %s", OBJNAME, elf_errmsg(e_err));
1207                         else
1208                                 warnx("%s: cannot get section", OBJNAME);
1209                         rtn = 1;
1210                         goto next_cmd;
1211                 }
1212                 if (gelf_getshdr(scn, &shdr) == NULL)
1213                         goto next_cmd;
1214
1215                 /*
1216                  * Cannot test by type and attribute for dynstr, strtab
1217                  */
1218                 shname = elf_strptr(elf, shstrndx, (size_t) shdr.sh_name);
1219                 if (shname != NULL) {
1220                         if ((sec_table[i] = strdup(shname)) == NULL) {
1221                                 warn("strdup");
1222                                 goto next_cmd;
1223                         }
1224                         if (!strncmp(shname, ".dynstr", 7)) {
1225                                 dynndx = elf_ndxscn(scn);
1226                                 if (dynndx == SHN_UNDEF) {
1227                                         warnx("%s: elf_ndxscn failed: %s",
1228                                             OBJNAME, elf_errmsg(-1));
1229                                         goto next_cmd;
1230                                 }
1231                         }
1232                         if (!strncmp(shname, ".strtab", 7)) {
1233                                 strndx = elf_ndxscn(scn);
1234                                 if (strndx == SHN_UNDEF) {
1235                                         warnx("%s: elf_ndxscn failed: %s",
1236                                             OBJNAME, elf_errmsg(-1));
1237                                         goto next_cmd;
1238                                 }
1239                         }
1240                 } else {
1241                         sec_table[i] = strdup("*UND*");
1242                         if (sec_table[i] == NULL) {
1243                                 warn("strdup");
1244                                 goto next_cmd;
1245                         }
1246                 }
1247
1248
1249                 if (is_sec_text(&shdr))
1250                         type_table[i] = 'T';
1251                 else if (is_sec_data(&shdr)) {
1252                         if (is_sec_readonly(&shdr))
1253                                 type_table[i] = 'R';
1254                         else
1255                                 type_table[i] = 'D';
1256                 } else if (is_sec_nobits(&shdr))
1257                         type_table[i] = 'B';
1258                 else if (is_sec_debug(shname))
1259                         type_table[i] = 'N';
1260                 else if (is_sec_readonly(&shdr) && !is_sec_nobits(&shdr))
1261                         type_table[i] = 'n';
1262         }
1263
1264         print_header(filename, objname);
1265
1266         if ((dynndx == SHN_UNDEF && nm_opts.print_symbol == PRINT_SYM_DYN) ||
1267             (strndx == SHN_UNDEF && nm_opts.print_symbol == PRINT_SYM_SYM)) {
1268                 warnx("%s: no symbols", OBJNAME);
1269                 /* This is not an error case */
1270                 goto next_cmd;
1271         }
1272
1273         STAILQ_INIT(&list_head);
1274
1275         if (!nm_opts.debug_line)
1276                 goto process_sym;
1277
1278         /*
1279          * Collect dwarf line number information.
1280          */
1281
1282         if (dwarf_elf_init(elf, DW_DLC_READ, NULL, NULL, &dbg, &de) !=
1283             DW_DLV_OK) {
1284                 warnx("dwarf_elf_init failed: %s", dwarf_errmsg(de));
1285                 goto process_sym;
1286         }
1287
1288         line_info = malloc(sizeof(struct line_info_head));
1289         func_info = malloc(sizeof(struct func_info_head));
1290         var_info = malloc(sizeof(struct var_info_head));
1291         if (line_info == NULL || func_info == NULL || var_info == NULL) {
1292                 warn("malloc");
1293                 (void) dwarf_finish(dbg, &de);
1294                 goto process_sym;
1295         }
1296         SLIST_INIT(line_info);
1297         SLIST_INIT(func_info);
1298         SLIST_INIT(var_info);
1299
1300         while ((ret = dwarf_next_cu_header(dbg, NULL, NULL, NULL, NULL, NULL,
1301             &de)) ==  DW_DLV_OK) {
1302                 die = NULL;
1303                 while (dwarf_siblingof(dbg, die, &die, &de) == DW_DLV_OK) {
1304                         if (dwarf_tag(die, &tag, &de) != DW_DLV_OK) {
1305                                 warnx("dwarf_tag failed: %s",
1306                                     dwarf_errmsg(de));
1307                                 continue;
1308                         }
1309                         /* XXX: What about DW_TAG_partial_unit? */
1310                         if (tag == DW_TAG_compile_unit)
1311                                 break;
1312                 }
1313                 if (die == NULL) {
1314                         warnx("could not find DW_TAG_compile_unit die");
1315                         continue;
1316                 }
1317
1318                 /* Retrieve source file list. */
1319                 ret = dwarf_srcfiles(die, &src_files, &filecount, &de);
1320                 if (ret == DW_DLV_ERROR)
1321                         warnx("dwarf_srclines: %s", dwarf_errmsg(de));
1322                 if (ret != DW_DLV_OK)
1323                         continue;
1324
1325                 /*
1326                  * Retrieve line number information from .debug_line section.
1327                  */
1328
1329                 ret = dwarf_srclines(die, &lbuf, &lcount, &de);
1330                 if (ret == DW_DLV_ERROR)
1331                         warnx("dwarf_srclines: %s", dwarf_errmsg(de));
1332                 if (ret != DW_DLV_OK)
1333                         goto line_attr;
1334                 for (i = 0; (Dwarf_Signed) i < lcount; i++) {
1335                         if (dwarf_lineaddr(lbuf[i], &lineaddr, &de)) {
1336                                 warnx("dwarf_lineaddr: %s", dwarf_errmsg(de));
1337                                 continue;
1338                         }
1339                         if (dwarf_lineno(lbuf[i], &lineno, &de)) {
1340                                 warnx("dwarf_lineno: %s", dwarf_errmsg(de));
1341                                 continue;
1342                         }
1343                         if (dwarf_linesrc(lbuf[i], &sfile, &de)) {
1344                                 warnx("dwarf_linesrc: %s", dwarf_errmsg(de));
1345                                 continue;
1346                         }
1347                         if ((lie = malloc(sizeof(*lie))) == NULL) {
1348                                 warn("malloc");
1349                                 continue;
1350                         }
1351                         lie->addr = lineaddr;
1352                         lie->line = lineno;
1353                         lie->file = strdup(sfile);
1354                         if (lie->file == NULL) {
1355                                 warn("strdup");
1356                                 free(lie);
1357                                 continue;
1358                         }
1359                         SLIST_INSERT_HEAD(line_info, lie, entries);
1360                 }
1361
1362         line_attr:
1363                 /* Retrieve line number information from DIEs. */
1364                 search_line_attr(dbg, func_info, var_info, die, src_files, filecount);
1365         }
1366
1367         (void) dwarf_finish(dbg, &de);
1368
1369 process_sym:
1370
1371         p_data.list_num = get_sym(elf, &list_head, shnum, dynndx, strndx,
1372             type_table, (void *) sec_table, shnum);
1373
1374         if (p_data.list_num == 0)
1375                 goto next_cmd;
1376
1377         p_data.headp = &list_head;
1378         p_data.sh_num = shnum;
1379         p_data.t_table = type_table;
1380         p_data.s_table = (void *) sec_table;
1381         p_data.filename = filename;
1382         p_data.objname = objname;
1383
1384         sym_list_print(&p_data, func_info, var_info, line_info);
1385
1386 next_cmd:
1387         if (nm_opts.debug_line) {
1388                 if (func_info != NULL) {
1389                         while (!SLIST_EMPTY(func_info)) {
1390                                 func = SLIST_FIRST(func_info);
1391                                 SLIST_REMOVE_HEAD(func_info, entries);
1392                                 free(func->file);
1393                                 free(func->name);
1394                                 free(func);
1395                         }
1396                         free(func_info);
1397                         func_info = NULL;
1398                 }
1399                 if (var_info != NULL) {
1400                         while (!SLIST_EMPTY(var_info)) {
1401                                 var = SLIST_FIRST(var_info);
1402                                 SLIST_REMOVE_HEAD(var_info, entries);
1403                                 free(var->file);
1404                                 free(var->name);
1405                                 free(var);
1406                         }
1407                         free(var_info);
1408                         var_info = NULL;
1409                 }
1410                 if (line_info != NULL) {
1411                         while (!SLIST_EMPTY(line_info)) {
1412                                 lie = SLIST_FIRST(line_info);
1413                                 SLIST_REMOVE_HEAD(line_info, entries);
1414                                 free(lie->file);
1415                                 free(lie);
1416                         }
1417                         free(line_info);
1418                         line_info = NULL;
1419                 }
1420         }
1421
1422         if (sec_table != NULL)
1423                 for (i = 0; i < shnum; ++i)
1424                         free(sec_table[i]);
1425         free(sec_table);
1426         free(type_table);
1427
1428         sym_list_dest(&list_head);
1429
1430         return (rtn);
1431
1432 #undef  OBJNAME
1433 }
1434
1435 static int
1436 read_object(const char *filename)
1437 {
1438         Elf *elf, *arf;
1439         Elf_Cmd elf_cmd;
1440         Elf_Kind kind;
1441         int fd, rtn, e_err;
1442
1443         assert(filename != NULL && "filename is null");
1444
1445         if ((fd = open(filename, O_RDONLY)) == -1) {
1446                 warn("'%s'", filename);
1447                 return (1);
1448         }
1449
1450         elf_cmd = ELF_C_READ;
1451         if ((arf = elf_begin(fd, elf_cmd, (Elf *) NULL)) == NULL) {
1452                 if ((e_err = elf_errno()) != 0)
1453                         warnx("elf_begin error: %s", elf_errmsg(e_err));
1454                 else
1455                         warnx("elf_begin error");
1456                 close(fd);
1457                 return (1);
1458         }
1459
1460         assert(arf != NULL && "arf is null.");
1461
1462         rtn = 0;
1463         if ((kind = elf_kind(arf)) == ELF_K_NONE) {
1464                 warnx("%s: File format not recognized", filename);
1465                 elf_end(arf);
1466                 close(fd);
1467                 return (1);
1468         }
1469         if (kind == ELF_K_AR) {
1470                 if (nm_opts.print_name == PRINT_NAME_MULTI &&
1471                     nm_opts.elem_print_fn == sym_elem_print_all)
1472                         printf("\n%s:\n", filename);
1473                 if (nm_opts.print_armap == true)
1474                         print_ar_index(fd, arf);
1475         }
1476
1477         while ((elf = elf_begin(fd, elf_cmd, arf)) != NULL) {
1478                 rtn |= read_elf(elf, filename, kind);
1479
1480                 /*
1481                  * If file is not archive, elf_next return ELF_C_NULL and
1482                  * stop the loop.
1483                  */
1484                 elf_cmd = elf_next(elf);
1485                 elf_end(elf);
1486         }
1487
1488         elf_end(arf);
1489         close(fd);
1490
1491         return (rtn);
1492 }
1493
1494 static int
1495 read_files(int argc, char **argv)
1496 {
1497         int rtn = 0;
1498
1499         if (argc < 0 || argv == NULL)
1500                 return (1);
1501
1502         if (argc == 0)
1503                 rtn |= read_object(nm_info.def_filename);
1504         else {
1505                 if (nm_opts.print_name == PRINT_NAME_NONE && argc > 1)
1506                         nm_opts.print_name = PRINT_NAME_MULTI;
1507                 while (argc > 0) {
1508                         rtn |= read_object(*argv);
1509                         --argc;
1510                         ++argv;
1511                 }
1512         }
1513
1514         return (rtn);
1515 }
1516
1517 static void
1518 print_lineno(struct sym_entry *ep, struct func_info_head *func_info,
1519     struct var_info_head *var_info, struct line_info_head *line_info)
1520 {
1521         struct func_info_entry *func;
1522         struct var_info_entry *var;
1523         struct line_info_entry *lie;
1524
1525         /* For function symbol, search the function line information list.  */
1526         if ((ep->sym->st_info & 0xf) == STT_FUNC && func_info != NULL) {
1527                 SLIST_FOREACH(func, func_info, entries) {
1528                         if (!strcmp(ep->name, func->name) &&
1529                             ep->sym->st_value >= func->lowpc &&
1530                             ep->sym->st_value < func->highpc) {
1531                                 printf("\t%s:%" PRIu64, func->file, func->line);
1532                                 return;
1533                         }
1534                 }
1535         }
1536
1537         /* For variable symbol, search the variable line information list.  */
1538         if ((ep->sym->st_info & 0xf) == STT_OBJECT && var_info != NULL) {
1539                 SLIST_FOREACH(var, var_info, entries) {
1540                         if (!strcmp(ep->name, var->name) &&
1541                             ep->sym->st_value == var->addr) {
1542                                 printf("\t%s:%" PRIu64, var->file, var->line);
1543                                 return;
1544                         }
1545                 }
1546         }
1547
1548         /* Otherwise search line number information the .debug_line section. */
1549         if (line_info != NULL) {
1550                 SLIST_FOREACH(lie, line_info, entries) {
1551                         if (ep->sym->st_value == lie->addr) {
1552                                 printf("\t%s:%" PRIu64, lie->file, lie->line);
1553                                 return;
1554                         }
1555                 }
1556         }
1557 }
1558
1559 static void
1560 set_opt_value_print_fn(enum radix t)
1561 {
1562
1563         switch (t) {
1564         case RADIX_OCT:
1565                 nm_opts.value_print_fn = &sym_value_oct_print;
1566                 nm_opts.size_print_fn = &sym_size_oct_print;
1567
1568                 break;
1569         case RADIX_DEC:
1570                 nm_opts.value_print_fn = &sym_value_dec_print;
1571                 nm_opts.size_print_fn = &sym_size_dec_print;
1572
1573                 break;
1574         case RADIX_HEX:
1575         default :
1576                 nm_opts.value_print_fn = &sym_value_hex_print;
1577                 nm_opts.size_print_fn  = &sym_size_hex_print;
1578         }
1579
1580         assert(nm_opts.value_print_fn != NULL &&
1581             "nm_opts.value_print_fn is null");
1582 }
1583
1584 static void
1585 sym_elem_print_all(char type, const char *sec, const GElf_Sym *sym,
1586     const char *name)
1587 {
1588
1589         if (sec == NULL || sym == NULL || name == NULL ||
1590             nm_opts.value_print_fn == NULL)
1591                 return;
1592
1593         if (IS_UNDEF_SYM_TYPE(type)) {
1594                 if (nm_opts.t == RADIX_HEX && nm_elfclass == ELFCLASS32)
1595                         printf("%-8s", "");
1596                 else
1597                         printf("%-16s", "");
1598         } else {
1599                 switch ((nm_opts.sort_fn == & cmp_size ? 2 : 0) +
1600                     nm_opts.print_size) {
1601                 case 3:
1602                         if (sym->st_size != 0) {
1603                                 nm_opts.value_print_fn(sym);
1604                                 printf(" ");
1605                                 nm_opts.size_print_fn(sym);
1606                         }
1607                         break;
1608
1609                 case 2:
1610                         if (sym->st_size != 0)
1611                                 nm_opts.size_print_fn(sym);
1612                         break;
1613
1614                 case 1:
1615                         nm_opts.value_print_fn(sym);
1616                         if (sym->st_size != 0) {
1617                                 printf(" ");
1618                                 nm_opts.size_print_fn(sym);
1619                         }
1620                         break;
1621
1622                 case 0:
1623                 default:
1624                         nm_opts.value_print_fn(sym);
1625                 }
1626         }
1627
1628         printf(" %c ", type);
1629         PRINT_DEMANGLED_NAME("%s", name);
1630 }
1631
1632 static void
1633 sym_elem_print_all_portable(char type, const char *sec, const GElf_Sym *sym,
1634     const char *name)
1635 {
1636
1637         if (sec == NULL || sym == NULL || name == NULL ||
1638             nm_opts.value_print_fn == NULL)
1639                 return;
1640
1641         PRINT_DEMANGLED_NAME("%s", name);
1642         printf(" %c ", type);
1643         if (!IS_UNDEF_SYM_TYPE(type)) {
1644                 nm_opts.value_print_fn(sym);
1645                 printf(" ");
1646                 if (sym->st_size != 0)
1647                         nm_opts.size_print_fn(sym);
1648         } else
1649                 printf("        ");
1650 }
1651
1652 static void
1653 sym_elem_print_all_sysv(char type, const char *sec, const GElf_Sym *sym,
1654     const char *name)
1655 {
1656
1657         if (sec == NULL || sym == NULL || name == NULL ||
1658             nm_opts.value_print_fn == NULL)
1659                 return;
1660
1661         PRINT_DEMANGLED_NAME("%-20s|", name);
1662         if (IS_UNDEF_SYM_TYPE(type))
1663                 printf("                ");
1664         else
1665                 nm_opts.value_print_fn(sym);
1666
1667         printf("|   %c  |", type);
1668
1669         switch (sym->st_info & 0xf) {
1670         case STT_OBJECT:
1671                 printf("%18s|", "OBJECT");
1672                 break;
1673
1674         case STT_FUNC:
1675                 printf("%18s|", "FUNC");
1676                 break;
1677
1678         case STT_SECTION:
1679                 printf("%18s|", "SECTION");
1680                 break;
1681
1682         case STT_FILE:
1683                 printf("%18s|", "FILE");
1684                 break;
1685
1686         case STT_LOPROC:
1687                 printf("%18s|", "LOPROC");
1688                 break;
1689
1690         case STT_HIPROC:
1691                 printf("%18s|", "HIPROC");
1692                 break;
1693
1694         case STT_NOTYPE:
1695         default:
1696                 printf("%18s|", "NOTYPE");
1697         };
1698
1699         if (sym->st_size != 0)
1700                 nm_opts.size_print_fn(sym);
1701         else
1702                 printf("                ");
1703
1704         printf("|     |%s", sec);
1705 }
1706
1707 static int
1708 sym_elem_def(char type, const GElf_Sym *sym, const char *name)
1709 {
1710
1711         assert(IS_SYM_TYPE((unsigned char) type));
1712
1713         UNUSED(sym);
1714         UNUSED(name);
1715
1716         return (!IS_UNDEF_SYM_TYPE((unsigned char) type));
1717 }
1718
1719 static int
1720 sym_elem_global(char type, const GElf_Sym *sym, const char *name)
1721 {
1722
1723         assert(IS_SYM_TYPE((unsigned char) type));
1724
1725         UNUSED(sym);
1726         UNUSED(name);
1727
1728         /* weak symbols resemble global. */
1729         return (isupper((unsigned char) type) || type == 'w');
1730 }
1731
1732 static int
1733 sym_elem_global_static(char type, const GElf_Sym *sym, const char *name)
1734 {
1735         unsigned char info;
1736
1737         assert(sym != NULL);
1738
1739         UNUSED(type);
1740         UNUSED(name);
1741
1742         info = sym->st_info >> 4;
1743
1744         return (info == STB_LOCAL ||
1745             info == STB_GLOBAL ||
1746             info == STB_WEAK);
1747 }
1748
1749 static int
1750 sym_elem_nondebug(char type, const GElf_Sym *sym, const char *name)
1751 {
1752
1753         assert(sym != NULL);
1754
1755         UNUSED(type);
1756         UNUSED(name);
1757
1758         if (sym->st_value == 0 && (sym->st_info & 0xf) == STT_FILE)
1759                 return (0);
1760         if (sym->st_name == 0)
1761                 return (0);
1762
1763         return (1);
1764 }
1765
1766 static int
1767 sym_elem_nonzero_size(char type, const GElf_Sym *sym, const char *name)
1768 {
1769
1770         assert(sym != NULL);
1771
1772         UNUSED(type);
1773         UNUSED(name);
1774
1775         return (sym->st_size > 0);
1776 }
1777
1778 static int
1779 sym_elem_undef(char type, const GElf_Sym *sym, const char *name)
1780 {
1781
1782         assert(IS_SYM_TYPE((unsigned char) type));
1783
1784         UNUSED(sym);
1785         UNUSED(name);
1786
1787         return (IS_UNDEF_SYM_TYPE((unsigned char) type));
1788 }
1789
1790 static void
1791 sym_list_dest(struct sym_head *headp)
1792 {
1793         struct sym_entry *ep, *ep_n;
1794
1795         if (headp == NULL)
1796                 return;
1797
1798         ep = STAILQ_FIRST(headp);
1799         while (ep != NULL) {
1800                 ep_n = STAILQ_NEXT(ep, sym_entries);
1801                 free(ep->sym);
1802                 free(ep->name);
1803                 free(ep);
1804                 ep = ep_n;
1805         }
1806 }
1807
1808 static int
1809 sym_list_insert(struct sym_head *headp, const char *name, const GElf_Sym *sym)
1810 {
1811         struct sym_entry *e;
1812
1813         if (headp == NULL || name == NULL || sym == NULL)
1814                 return (0);
1815         if ((e = malloc(sizeof(struct sym_entry))) == NULL) {
1816                 warn("malloc");
1817                 return (0);
1818         }
1819         if ((e->name = strdup(name)) == NULL) {
1820                 warn("strdup");
1821                 free(e);
1822                 return (0);
1823         }
1824         if ((e->sym = malloc(sizeof(GElf_Sym))) == NULL) {
1825                 warn("malloc");
1826                 free(e->name);
1827                 free(e);
1828                 return (0);
1829         }
1830
1831         memcpy(e->sym, sym, sizeof(GElf_Sym));
1832
1833         /* Display size instead of value for common symbol. */
1834         if (sym->st_shndx == SHN_COMMON)
1835                 e->sym->st_value = sym->st_size;
1836
1837         STAILQ_INSERT_TAIL(headp, e, sym_entries);
1838
1839         return (1);
1840 }
1841
1842 /* If file has not .debug_info, line_info will be NULL */
1843 static void
1844 sym_list_print(struct sym_print_data *p, struct func_info_head *func_info,
1845     struct var_info_head *var_info, struct line_info_head *line_info)
1846 {
1847         struct sym_entry *e_v;
1848         size_t si;
1849         int i;
1850
1851         if (p == NULL || CHECK_SYM_PRINT_DATA(p))
1852                 return;
1853         if ((e_v = sym_list_sort(p)) == NULL)
1854                 return;
1855         if (nm_opts.sort_reverse == false)
1856                 for (si = 0; si != p->list_num; ++si)
1857                         sym_list_print_each(&e_v[si], p, func_info, var_info,
1858                             line_info);
1859         else
1860                 for (i = p->list_num - 1; i != -1; --i)
1861                         sym_list_print_each(&e_v[i], p, func_info, var_info,
1862                             line_info);
1863
1864         free(e_v);
1865 }
1866
1867 /* If file has not .debug_info, line_info will be NULL */
1868 static void
1869 sym_list_print_each(struct sym_entry *ep, struct sym_print_data *p,
1870     struct func_info_head *func_info, struct var_info_head *var_info,
1871     struct line_info_head *line_info)
1872 {
1873         const char *sec;
1874         char type;
1875
1876         if (ep == NULL || CHECK_SYM_PRINT_DATA(p))
1877                 return;
1878
1879         assert(ep->name != NULL);
1880         assert(ep->sym != NULL);
1881
1882         type = get_sym_type(ep->sym, p->t_table);
1883
1884         if (nm_opts.print_name == PRINT_NAME_FULL) {
1885                 printf("%s", p->filename);
1886                 if (nm_opts.elem_print_fn == &sym_elem_print_all_portable) {
1887                         if (p->objname != NULL)
1888                                 printf("[%s]", p->objname);
1889                         printf(": ");
1890                 } else {
1891                         if (p->objname != NULL)
1892                                 printf(":%s", p->objname);
1893                         printf(":");
1894                 }
1895         }
1896
1897         switch (ep->sym->st_shndx) {
1898         case SHN_LOPROC:
1899                 /* LOPROC or LORESERVE */
1900                 sec = "*LOPROC*";
1901                 break;
1902         case SHN_HIPROC:
1903                 sec = "*HIPROC*";
1904                 break;
1905         case SHN_LOOS:
1906                 sec = "*LOOS*";
1907                 break;
1908         case SHN_HIOS:
1909                 sec = "*HIOS*";
1910                 break;
1911         case SHN_ABS:
1912                 sec = "*ABS*";
1913                 break;
1914         case SHN_COMMON:
1915                 sec = "*COM*";
1916                 break;
1917         case SHN_HIRESERVE:
1918                 /* HIRESERVE or XINDEX */
1919                 sec = "*HIRESERVE*";
1920                 break;
1921         default:
1922                 if (ep->sym->st_shndx > p->sh_num)
1923                         return;
1924                 sec = p->s_table[ep->sym->st_shndx];
1925                 break;
1926         };
1927
1928         nm_opts.elem_print_fn(type, sec, ep->sym, ep->name);
1929
1930         if (nm_opts.debug_line == true && !IS_UNDEF_SYM_TYPE(type))
1931                 print_lineno(ep, func_info, var_info, line_info);
1932
1933         printf("\n");
1934 }
1935
1936 static struct sym_entry *
1937 sym_list_sort(struct sym_print_data *p)
1938 {
1939         struct sym_entry *ep, *e_v;
1940         int idx;
1941
1942         if (p == NULL || CHECK_SYM_PRINT_DATA(p))
1943                 return (NULL);
1944
1945         if ((e_v = malloc(sizeof(struct sym_entry) * p->list_num)) == NULL) {
1946                 warn("malloc");
1947                 return (NULL);
1948         }
1949
1950         idx = 0;
1951         STAILQ_FOREACH(ep, p->headp, sym_entries) {
1952                 if (ep->name != NULL && ep->sym != NULL) {
1953                         e_v[idx].name = ep->name;
1954                         e_v[idx].sym = ep->sym;
1955                         ++idx;
1956                 }
1957         }
1958
1959         assert((size_t)idx == p->list_num);
1960
1961         if (nm_opts.sort_fn != &cmp_none) {
1962                 nm_print_data = p;
1963                 assert(nm_print_data != NULL);
1964                 qsort(e_v, p->list_num, sizeof(struct sym_entry),
1965                     nm_opts.sort_fn);
1966         }
1967
1968         return (e_v);
1969 }
1970
1971 static void
1972 sym_size_oct_print(const GElf_Sym *sym)
1973 {
1974
1975         assert(sym != NULL && "sym is null");
1976         printf("%016" PRIo64, sym->st_size);
1977 }
1978
1979 static void
1980 sym_size_hex_print(const GElf_Sym *sym)
1981 {
1982
1983         assert(sym != NULL && "sym is null");
1984         if (nm_elfclass == ELFCLASS32)
1985                 printf("%08" PRIx64, sym->st_size);
1986         else
1987                 printf("%016" PRIx64, sym->st_size);
1988 }
1989
1990 static void
1991 sym_size_dec_print(const GElf_Sym *sym)
1992 {
1993
1994         assert(sym != NULL && "sym is null");
1995         printf("%016" PRId64, sym->st_size);
1996 }
1997
1998 static void
1999 sym_value_oct_print(const GElf_Sym *sym)
2000 {
2001
2002         assert(sym != NULL && "sym is null");
2003         printf("%016" PRIo64, sym->st_value);
2004 }
2005
2006 static void
2007 sym_value_hex_print(const GElf_Sym *sym)
2008 {
2009
2010         assert(sym != NULL && "sym is null");
2011         if (nm_elfclass == ELFCLASS32)
2012                 printf("%08" PRIx64, sym->st_value);
2013         else
2014                 printf("%016" PRIx64, sym->st_value);
2015 }
2016
2017 static void
2018 sym_value_dec_print(const GElf_Sym *sym)
2019 {
2020
2021         assert(sym != NULL && "sym is null");
2022         printf("%016" PRId64, sym->st_value);
2023 }
2024
2025 static void
2026 usage(int exitcode)
2027 {
2028
2029         printf("Usage: %s [options] file ...\
2030 \n  Display symbolic information in file.\n\
2031 \n  Options: \
2032 \n  -A, --print-file-name     Write the full pathname or library name of an\
2033 \n                            object on each line.\
2034 \n  -a, --debug-syms          Display all symbols include debugger-only\
2035 \n                            symbols.", nm_info.name);
2036         printf("\
2037 \n  -B                        Equivalent to specifying \"--format=bsd\".\
2038 \n  -C, --demangle[=style]    Decode low-level symbol names.\
2039 \n      --no-demangle         Do not demangle low-level symbol names.\
2040 \n  -D, --dynamic             Display only dynamic symbols.\
2041 \n  -e                        Display only global and static symbols.");
2042         printf("\
2043 \n  -f                        Produce full output (default).\
2044 \n      --format=format       Display output in specific format.  Allowed\
2045 \n                            formats are: \"bsd\", \"posix\" and \"sysv\".\
2046 \n  -g, --extern-only         Display only global symbol information.\
2047 \n  -h, --help                Show this help message.\
2048 \n  -l, --line-numbers        Display filename and linenumber using\
2049 \n                            debugging information.\
2050 \n  -n, --numeric-sort        Sort symbols numerically by value.");
2051         printf("\
2052 \n  -o                        Write numeric values in octal. Equivalent to\
2053 \n                            specifying \"-t o\".\
2054 \n  -p, --no-sort             Do not sort symbols.\
2055 \n  -P                        Write information in a portable output format.\
2056 \n                            Equivalent to specifying \"--format=posix\".\
2057 \n  -r, --reverse-sort        Reverse the order of the sort.\
2058 \n  -S, --print-size          Print symbol sizes instead values.\
2059 \n  -s, --print-armap         Include an index of archive members.\
2060 \n      --size-sort           Sort symbols by size.");
2061         printf("\
2062 \n  -t, --radix=format        Write each numeric value in the specified\
2063 \n                            format:\
2064 \n                               d   In decimal,\
2065 \n                               o   In octal,\
2066 \n                               x   In hexadecimal.");
2067         printf("\
2068 \n  -u, --undefined-only      Display only undefined symbols.\
2069 \n      --defined-only        Display only defined symbols.\
2070 \n  -V, --version             Show the version identifier for %s.\
2071 \n  -v                        Sort output by value.\
2072 \n  -x                        Write numeric values in hexadecimal.\
2073 \n                            Equivalent to specifying \"-t x\".",
2074             nm_info.name);
2075         printf("\n\
2076 \n  The default options are: output in bsd format, use a hexadecimal radix,\
2077 \n  sort by symbol name, do not demangle names.\n");
2078
2079         exit(exitcode);
2080 }
2081
2082 /*
2083  * Display symbolic information in file.
2084  * Return 0 at success, >0 at failed.
2085  */
2086 int
2087 main(int argc, char **argv)
2088 {
2089         int rtn;
2090
2091         global_init();
2092         get_opt(argc, argv);
2093         rtn = read_files(argc - optind, argv + optind);
2094         global_dest();
2095
2096         exit(rtn);
2097 }