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 3504 2016-12-17 15:33:16Z kaiwang27 $");
  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 ? 1 : -1);
 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         if (shname == NULL)
 794                 return (false);
 795
 796         for (p = dbg_sec; *p; p++) {
 797                 if (!strncmp(shname, *p, strlen(*p)))
 798                         return (true);
 799         }
 800
 801         return (false);
 802 }
 803
 804 static bool
 805 is_sec_nobits(GElf_Shdr *s)
 806 {
 807
 808         assert(s != NULL && "shdr is NULL");
 809
 810         return (s->sh_type == SHT_NOBITS);
 811 }
 812
 813 static bool
 814 is_sec_readonly(GElf_Shdr *s)
 815 {
 816
 817         assert(s != NULL && "shdr is NULL");
 818
 819         return ((s->sh_flags & SHF_WRITE) == 0);
 820 }
 821
 822 static bool
 823 is_sec_text(GElf_Shdr *s)
 824 {
 825
 826         assert(s != NULL && "shdr is NULL");
 827
 828         return ((s->sh_flags & SHF_EXECINSTR) != 0);
 829 }
 830
 831 static void
 832 print_ar_index(int fd, Elf *arf)
 833 {
 834         Elf *elf;
 835         Elf_Arhdr *arhdr;
 836         Elf_Arsym *arsym;
 837         Elf_Cmd cmd;
 838         off_t start;
 839         size_t arsym_size;
 840
 841         if (arf == NULL)
 842                 return;
 843
 844         if ((arsym = elf_getarsym(arf, &arsym_size)) == NULL)
 845                 return;
 846
 847         printf("\nArchive index:\n");
 848
 849         start = arsym->as_off;
 850         cmd = ELF_C_READ;
 851         while (arsym_size > 1) {
 852                 if (elf_rand(arf, arsym->as_off) == arsym->as_off &&
 853                     (elf = elf_begin(fd, cmd, arf)) != NULL) {
 854                         if ((arhdr = elf_getarhdr(elf)) != NULL)
 855                                 printf("%s in %s\n", arsym->as_name,
 856                                     arhdr->ar_name != NULL ?
 857                                     arhdr->ar_name : arhdr->ar_rawname);
 858                         elf_end(elf);
 859                 }
 860                 ++arsym;
 861                 --arsym_size;
 862         }
 863
 864         elf_rand(arf, start);
 865 }
 866
 867 #define DEMANGLED_BUFFER_SIZE   (8 * 1024)
 868 #define PRINT_DEMANGLED_NAME(FORMAT, NAME) do {                         \
 869         char _demangled[DEMANGLED_BUFFER_SIZE];                         \
 870         if (nm_opts.demangle_type < 0 ||                                \
 871             elftc_demangle((NAME), _demangled, sizeof(_demangled),      \
 872                 nm_opts.demangle_type) < 0)                             \
 873                 printf((FORMAT), (NAME));                               \
 874         else                                                            \
 875                 printf((FORMAT), _demangled);                           \
 876         } while (0)
 877
 878 static void
 879 print_header(const char *file, const char *obj)
 880 {
 881
 882         if (file == NULL)
 883                 return;
 884
 885         if (nm_opts.elem_print_fn == &sym_elem_print_all_sysv) {
 886                 printf("\n\n%s from %s",
 887                     nm_opts.undef_only == false ? "Symbols" :
 888                     "Undefined symbols", file);
 889                 if (obj != NULL)
 890                         printf("[%s]", obj);
 891                 printf(":\n\n");
 892
 893                 printf("\
 894 Name                  Value           Class        Type         Size             Line  Section\n\n");
 895         } else {
 896                 /* archive file without -A option and POSIX */
 897                 if (nm_opts.print_name != PRINT_NAME_FULL && obj != NULL) {
 898                         if (nm_opts.elem_print_fn ==
 899                             sym_elem_print_all_portable)
 900                                 printf("%s[%s]:\n", file, obj);
 901                         else if (nm_opts.elem_print_fn == sym_elem_print_all)
 902                                 printf("\n%s:\n", obj);
 903                         /* multiple files(not archive) without -A option */
 904                 } else if (nm_opts.print_name == PRINT_NAME_MULTI) {
 905                         if (nm_opts.elem_print_fn == sym_elem_print_all)
 906                                 printf("\n");
 907                         printf("%s:\n", file);
 908                 }
 909         }
 910 }
 911
 912 static void
 913 print_version(void)
 914 {
 915
 916         (void) printf("%s (%s)\n", nm_info.name, elftc_version());
 917         exit(0);
 918 }
 919
 920 static uint64_t
 921 get_block_value(Dwarf_Debug dbg, Dwarf_Block *block)
 922 {
 923         Elf *elf;
 924         GElf_Ehdr eh;
 925         Dwarf_Error de;
 926
 927         if (dwarf_get_elf(dbg, &elf, &de) != DW_DLV_OK) {
 928                 warnx("dwarf_get_elf failed: %s", dwarf_errmsg(de));
 929                 return (0);
 930         }
 931
 932         if (gelf_getehdr(elf, &eh) != &eh) {
 933                 warnx("gelf_getehdr failed: %s", elf_errmsg(-1));
 934                 return (0);
 935         }
 936
 937         if (block->bl_len == 5) {
 938                 if (eh.e_ident[EI_DATA] == ELFDATA2LSB)
 939                         return (le32dec((uint8_t *) block->bl_data + 1));
 940                 else
 941                         return (be32dec((uint8_t *) block->bl_data + 1));
 942         } else if (block->bl_len == 9) {
 943                 if (eh.e_ident[EI_DATA] == ELFDATA2LSB)
 944                         return (le64dec((uint8_t *) block->bl_data + 1));
 945                 else
 946                         return (be64dec((uint8_t *) block->bl_data + 1));
 947         }
 948
 949         return (0);
 950 }
 951
 952 static char *
 953 find_object_name(Dwarf_Debug dbg, Dwarf_Die die)
 954 {
 955         Dwarf_Die ret_die;
 956         Dwarf_Attribute at;
 957         Dwarf_Off off;
 958         Dwarf_Error de;
 959         const char *str;
 960         char *name;
 961
 962         if (dwarf_attrval_string(die, DW_AT_name, &str, &de) == DW_DLV_OK) {
 963                 if ((name = strdup(str)) == NULL) {
 964                         warn("strdup");
 965                         return (NULL);
 966                 }
 967                 return (name);
 968         }
 969
 970         if (dwarf_attr(die, DW_AT_specification, &at, &de) != DW_DLV_OK)
 971                 return (NULL);
 972
 973         if (dwarf_global_formref(at, &off, &de) != DW_DLV_OK)
 974                 return (NULL);
 975
 976         if (dwarf_offdie(dbg, off, &ret_die, &de) != DW_DLV_OK)
 977                 return (NULL);
 978
 979         return (find_object_name(dbg, ret_die));
 980 }
 981
 982 static void
 983 search_line_attr(Dwarf_Debug dbg, struct func_info_head *func_info,
 984     struct var_info_head *var_info, Dwarf_Die die, char **src_files,
 985     Dwarf_Signed filecount)
 986 {
 987         Dwarf_Attribute at;
 988         Dwarf_Unsigned udata;
 989         Dwarf_Half tag;
 990         Dwarf_Block *block;
 991         Dwarf_Bool flag;
 992         Dwarf_Die ret_die;
 993         Dwarf_Error de;
 994         struct func_info_entry *func;
 995         struct var_info_entry *var;
 996         int ret;
 997
 998         if (dwarf_tag(die, &tag, &de) != DW_DLV_OK) {
 999                 warnx("dwarf_tag failed: %s", dwarf_errmsg(de));
1000                 goto cont_search;
1001         }
1002
1003         /* We're interested in DIEs which define functions or variables. */
1004         if (tag != DW_TAG_subprogram && tag != DW_TAG_entry_point &&
1005             tag != DW_TAG_inlined_subroutine && tag != DW_TAG_variable)
1006                 goto cont_search;
1007
1008         if (tag == DW_TAG_variable) {
1009
1010                 /* Ignore "artificial" variable. */
1011                 if (dwarf_attrval_flag(die, DW_AT_artificial, &flag, &de) ==
1012                     DW_DLV_OK && flag)
1013                         goto cont_search;
1014
1015                 /* Ignore pure declaration. */
1016                 if (dwarf_attrval_flag(die, DW_AT_declaration, &flag, &de) ==
1017                     DW_DLV_OK && flag)
1018                         goto cont_search;
1019
1020                 /* Ignore stack varaibles. */
1021                 if (dwarf_attrval_flag(die, DW_AT_external, &flag, &de) !=
1022                     DW_DLV_OK || !flag)
1023                         goto cont_search;
1024
1025                 if ((var = calloc(1, sizeof(*var))) == NULL) {
1026                         warn("calloc failed");
1027                         goto cont_search;
1028                 }
1029
1030                 if (dwarf_attrval_unsigned(die, DW_AT_decl_file, &udata,
1031                     &de) == DW_DLV_OK && udata > 0 &&
1032                     (Dwarf_Signed) (udata - 1) < filecount) {
1033                         var->file = strdup(src_files[udata - 1]);
1034                         if (var->file == NULL) {
1035                                 warn("strdup");
1036                                 free(var);
1037                                 goto cont_search;
1038                         }
1039                 }
1040
1041                 if (dwarf_attrval_unsigned(die, DW_AT_decl_line, &udata, &de) ==
1042                     DW_DLV_OK)
1043                         var->line = udata;
1044
1045                 var->name = find_object_name(dbg, die);
1046                 if (var->name == NULL) {
1047                         if (var->file)
1048                                 free(var->file);
1049                         free(var);
1050                         goto cont_search;
1051                 }
1052
1053                 if (dwarf_attr(die, DW_AT_location, &at, &de) == DW_DLV_OK &&
1054                     dwarf_formblock(at, &block, &de) == DW_DLV_OK) {
1055                         /*
1056                          * Since we ignored stack variables, the rest are the
1057                          * external varaibles which should always use DW_OP_addr
1058                          * operator for DW_AT_location value.
1059                          */
1060                         if (*((uint8_t *)block->bl_data) == DW_OP_addr)
1061                                 var->addr = get_block_value(dbg, block);
1062                 }
1063
1064                 SLIST_INSERT_HEAD(var_info, var, entries);
1065
1066         } else {
1067
1068                 if ((func = calloc(1, sizeof(*func))) == NULL) {
1069                         warn("calloc failed");
1070                         goto cont_search;
1071                 }
1072
1073                 /*
1074                  * Note that dwarf_attrval_unsigned() handles DW_AT_abstract_origin
1075                  * internally, so it can retrieve DW_AT_decl_file/DW_AT_decl_line
1076                  * attributes for inlined functions as well.
1077                  */
1078                 if (dwarf_attrval_unsigned(die, DW_AT_decl_file, &udata,
1079                     &de) == DW_DLV_OK && udata > 0 &&
1080                     (Dwarf_Signed) (udata - 1) < filecount) {
1081                         func->file = strdup(src_files[udata - 1]);
1082                         if (func->file == NULL) {
1083                                 warn("strdup");
1084                                 free(func);
1085                                 goto cont_search;
1086                         }
1087                 }
1088
1089                 if (dwarf_attrval_unsigned(die, DW_AT_decl_line, &udata, &de) ==
1090                     DW_DLV_OK)
1091                         func->line = udata;
1092
1093                 func->name = find_object_name(dbg, die);
1094                 if (func->name == NULL) {
1095                         if (func->file)
1096                                 free(func->file);
1097                         free(func);
1098                         goto cont_search;
1099                 }
1100
1101                 if (dwarf_attrval_unsigned(die, DW_AT_low_pc, &udata, &de) ==
1102                     DW_DLV_OK)
1103                         func->lowpc = udata;
1104                 if (dwarf_attrval_unsigned(die, DW_AT_high_pc, &udata, &de) ==
1105                     DW_DLV_OK)
1106                         func->highpc = udata;
1107
1108                 SLIST_INSERT_HEAD(func_info, func, entries);
1109         }
1110
1111 cont_search:
1112
1113         /* Search children. */
1114         ret = dwarf_child(die, &ret_die, &de);
1115         if (ret == DW_DLV_ERROR)
1116                 warnx("dwarf_child: %s", dwarf_errmsg(de));
1117         else if (ret == DW_DLV_OK)
1118                 search_line_attr(dbg, func_info, var_info, ret_die, src_files,
1119                     filecount);
1120
1121         /* Search sibling. */
1122         ret = dwarf_siblingof(dbg, die, &ret_die, &de);
1123         if (ret == DW_DLV_ERROR)
1124                 warnx("dwarf_siblingof: %s", dwarf_errmsg(de));
1125         else if (ret == DW_DLV_OK)
1126                 search_line_attr(dbg, func_info, var_info, ret_die, src_files,
1127                     filecount);
1128
1129         dwarf_dealloc(dbg, die, DW_DLA_DIE);
1130 }
1131
1132 /*
1133  * Read elf file and collect symbol information, sort them, print.
1134  * Return 1 at failed, 0 at success.
1135  */
1136 static int
1137 read_elf(Elf *elf, const char *filename, Elf_Kind kind)
1138 {
1139         Dwarf_Debug dbg;
1140         Dwarf_Die die;
1141         Dwarf_Error de;
1142         Dwarf_Half tag;
1143         Elf_Arhdr *arhdr;
1144         Elf_Scn *scn;
1145         GElf_Shdr shdr;
1146         GElf_Half i;
1147         Dwarf_Line *lbuf;
1148         Dwarf_Unsigned lineno;
1149         Dwarf_Signed lcount, filecount;
1150         Dwarf_Addr lineaddr;
1151         struct sym_print_data p_data;
1152         struct sym_head list_head;
1153         struct line_info_head *line_info;
1154         struct func_info_head *func_info;
1155         struct var_info_head *var_info;
1156         struct line_info_entry *lie;
1157         struct func_info_entry *func;
1158         struct var_info_entry *var;
1159         const char *shname, *objname;
1160         char *type_table, **sec_table, *sfile, **src_files;
1161         size_t shstrndx, shnum, dynndx, strndx;
1162         int ret, rtn, e_err;
1163
1164 #define OBJNAME (objname == NULL ? filename : objname)
1165
1166         assert(filename != NULL && "filename is null");
1167
1168         STAILQ_INIT(&list_head);
1169         type_table = NULL;
1170         sec_table = NULL;
1171         line_info = NULL;
1172         func_info = NULL;
1173         var_info = NULL;
1174         objname = NULL;
1175         dynndx = SHN_UNDEF;
1176         strndx = SHN_UNDEF;
1177         rtn = 0;
1178
1179         nm_elfclass = gelf_getclass(elf);
1180
1181         if (kind == ELF_K_AR) {
1182                 if ((arhdr = elf_getarhdr(elf)) == NULL)
1183                         goto next_cmd;
1184                 objname = arhdr->ar_name != NULL ? arhdr->ar_name :
1185                     arhdr->ar_rawname;
1186         }
1187         if (!elf_getshnum(elf, &shnum)) {
1188                 if ((e_err = elf_errno()) != 0)
1189                         warnx("%s: %s", OBJNAME, "File format not recognized");
1190                 else
1191                         warnx("%s: cannot get section number", OBJNAME);
1192                 rtn = 1;
1193                 goto next_cmd;
1194         }
1195         if (shnum == 0) {
1196                 warnx("%s: has no section", OBJNAME);
1197                 rtn = 1;
1198                 goto next_cmd;
1199         }
1200         if (!elf_getshstrndx(elf, &shstrndx)) {
1201                 warnx("%s: cannot get str index", OBJNAME);
1202                 rtn = 1;
1203                 goto next_cmd;
1204         }
1205         /* type_table for type determine */
1206         if ((type_table = malloc(sizeof(char) * shnum)) == NULL) {
1207                 warn("%s: malloc", OBJNAME);
1208                 rtn = 1;
1209                 goto next_cmd;
1210         }
1211         /* sec_table for section name to display in sysv format */
1212         if ((sec_table = calloc(shnum, sizeof(char *))) == NULL) {
1213                 warn("%s: calloc", OBJNAME);
1214                 rtn = 1;
1215                 goto next_cmd;
1216         }
1217
1218         type_table[0] = 'U';
1219         if ((sec_table[0] = strdup("*UND*")) == NULL) {
1220                 warn("strdup");
1221                 goto next_cmd;
1222         }
1223
1224         for (i = 1; i < shnum; ++i) {
1225                 type_table[i] = 'U';
1226                 if ((scn = elf_getscn(elf, i)) == NULL) {
1227                         if ((e_err = elf_errno()) != 0)
1228                                 warnx("%s: %s", OBJNAME, elf_errmsg(e_err));
1229                         else
1230                                 warnx("%s: cannot get section", OBJNAME);
1231                         rtn = 1;
1232                         goto next_cmd;
1233                 }
1234                 if (gelf_getshdr(scn, &shdr) == NULL)
1235                         goto next_cmd;
1236
1237                 /*
1238                  * Cannot test by type and attribute for dynstr, strtab
1239                  */
1240                 shname = elf_strptr(elf, shstrndx, (size_t) shdr.sh_name);
1241                 if (shname != NULL) {
1242                         if ((sec_table[i] = strdup(shname)) == NULL) {
1243                                 warn("strdup");
1244                                 goto next_cmd;
1245                         }
1246                         if (!strncmp(shname, ".dynstr", 7)) {
1247                                 dynndx = elf_ndxscn(scn);
1248                                 if (dynndx == SHN_UNDEF) {
1249                                         warnx("%s: elf_ndxscn failed: %s",
1250                                             OBJNAME, elf_errmsg(-1));
1251                                         goto next_cmd;
1252                                 }
1253                         }
1254                         if (!strncmp(shname, ".strtab", 7)) {
1255                                 strndx = elf_ndxscn(scn);
1256                                 if (strndx == SHN_UNDEF) {
1257                                         warnx("%s: elf_ndxscn failed: %s",
1258                                             OBJNAME, elf_errmsg(-1));
1259                                         goto next_cmd;
1260                                 }
1261                         }
1262                 } else {
1263                         sec_table[i] = strdup("*UND*");
1264                         if (sec_table[i] == NULL) {
1265                                 warn("strdup");
1266                                 goto next_cmd;
1267                         }
1268                 }
1269
1270
1271                 if (is_sec_text(&shdr))
1272                         type_table[i] = 'T';
1273                 else if (is_sec_data(&shdr)) {
1274                         if (is_sec_readonly(&shdr))
1275                                 type_table[i] = 'R';
1276                         else
1277                                 type_table[i] = 'D';
1278                 } else if (is_sec_nobits(&shdr))
1279                         type_table[i] = 'B';
1280                 else if (is_sec_debug(shname))
1281                         type_table[i] = 'N';
1282                 else if (is_sec_readonly(&shdr) && !is_sec_nobits(&shdr))
1283                         type_table[i] = 'n';
1284         }
1285
1286         print_header(filename, objname);
1287
1288         if ((dynndx == SHN_UNDEF && nm_opts.print_symbol == PRINT_SYM_DYN) ||
1289             (strndx == SHN_UNDEF && nm_opts.print_symbol == PRINT_SYM_SYM)) {
1290                 warnx("%s: no symbols", OBJNAME);
1291                 /* This is not an error case */
1292                 goto next_cmd;
1293         }
1294
1295         STAILQ_INIT(&list_head);
1296
1297         if (!nm_opts.debug_line)
1298                 goto process_sym;
1299
1300         /*
1301          * Collect dwarf line number information.
1302          */
1303
1304         if (dwarf_elf_init(elf, DW_DLC_READ, NULL, NULL, &dbg, &de) !=
1305             DW_DLV_OK) {
1306                 warnx("dwarf_elf_init failed: %s", dwarf_errmsg(de));
1307                 goto process_sym;
1308         }
1309
1310         line_info = malloc(sizeof(struct line_info_head));
1311         func_info = malloc(sizeof(struct func_info_head));
1312         var_info = malloc(sizeof(struct var_info_head));
1313         if (line_info != NULL)
1314                 SLIST_INIT(line_info);
1315         if (func_info != NULL)
1316                 SLIST_INIT(func_info);
1317         if (var_info != NULL)
1318                 SLIST_INIT(var_info);
1319         if (line_info == NULL || func_info == NULL || var_info == NULL) {
1320                 warn("malloc");
1321                 (void) dwarf_finish(dbg, &de);
1322                 goto process_sym;
1323         }
1324
1325         while ((ret = dwarf_next_cu_header(dbg, NULL, NULL, NULL, NULL, NULL,
1326             &de)) ==  DW_DLV_OK) {
1327                 die = NULL;
1328                 while (dwarf_siblingof(dbg, die, &die, &de) == DW_DLV_OK) {
1329                         if (dwarf_tag(die, &tag, &de) != DW_DLV_OK) {
1330                                 warnx("dwarf_tag failed: %s",
1331                                     dwarf_errmsg(de));
1332                                 continue;
1333                         }
1334                         /* XXX: What about DW_TAG_partial_unit? */
1335                         if (tag == DW_TAG_compile_unit)
1336                                 break;
1337                 }
1338                 if (die == NULL) {
1339                         warnx("could not find DW_TAG_compile_unit die");
1340                         continue;
1341                 }
1342
1343                 /* Retrieve source file list. */
1344                 ret = dwarf_srcfiles(die, &src_files, &filecount, &de);
1345                 if (ret == DW_DLV_ERROR)
1346                         warnx("dwarf_srclines: %s", dwarf_errmsg(de));
1347                 if (ret != DW_DLV_OK)
1348                         continue;
1349
1350                 /*
1351                  * Retrieve line number information from .debug_line section.
1352                  */
1353
1354                 ret = dwarf_srclines(die, &lbuf, &lcount, &de);
1355                 if (ret == DW_DLV_ERROR)
1356                         warnx("dwarf_srclines: %s", dwarf_errmsg(de));
1357                 if (ret != DW_DLV_OK)
1358                         goto line_attr;
1359                 for (i = 0; (Dwarf_Signed) i < lcount; i++) {
1360                         if (dwarf_lineaddr(lbuf[i], &lineaddr, &de)) {
1361                                 warnx("dwarf_lineaddr: %s", dwarf_errmsg(de));
1362                                 continue;
1363                         }
1364                         if (dwarf_lineno(lbuf[i], &lineno, &de)) {
1365                                 warnx("dwarf_lineno: %s", dwarf_errmsg(de));
1366                                 continue;
1367                         }
1368                         if (dwarf_linesrc(lbuf[i], &sfile, &de)) {
1369                                 warnx("dwarf_linesrc: %s", dwarf_errmsg(de));
1370                                 continue;
1371                         }
1372                         if ((lie = malloc(sizeof(*lie))) == NULL) {
1373                                 warn("malloc");
1374                                 continue;
1375                         }
1376                         lie->addr = lineaddr;
1377                         lie->line = lineno;
1378                         lie->file = strdup(sfile);
1379                         if (lie->file == NULL) {
1380                                 warn("strdup");
1381                                 free(lie);
1382                                 continue;
1383                         }
1384                         SLIST_INSERT_HEAD(line_info, lie, entries);
1385                 }
1386
1387         line_attr:
1388                 /* Retrieve line number information from DIEs. */
1389                 search_line_attr(dbg, func_info, var_info, die, src_files, filecount);
1390         }
1391
1392         (void) dwarf_finish(dbg, &de);
1393
1394 process_sym:
1395
1396         p_data.list_num = get_sym(elf, &list_head, shnum, dynndx, strndx,
1397             type_table, (void *) sec_table, shnum);
1398
1399         if (p_data.list_num == 0)
1400                 goto next_cmd;
1401
1402         p_data.headp = &list_head;
1403         p_data.sh_num = shnum;
1404         p_data.t_table = type_table;
1405         p_data.s_table = (void *) sec_table;
1406         p_data.filename = filename;
1407         p_data.objname = objname;
1408
1409         sym_list_print(&p_data, func_info, var_info, line_info);
1410
1411 next_cmd:
1412         if (nm_opts.debug_line) {
1413                 if (func_info != NULL) {
1414                         while (!SLIST_EMPTY(func_info)) {
1415                                 func = SLIST_FIRST(func_info);
1416                                 SLIST_REMOVE_HEAD(func_info, entries);
1417                                 free(func->file);
1418                                 free(func->name);
1419                                 free(func);
1420                         }
1421                         free(func_info);
1422                         func_info = NULL;
1423                 }
1424                 if (var_info != NULL) {
1425                         while (!SLIST_EMPTY(var_info)) {
1426                                 var = SLIST_FIRST(var_info);
1427                                 SLIST_REMOVE_HEAD(var_info, entries);
1428                                 free(var->file);
1429                                 free(var->name);
1430                                 free(var);
1431                         }
1432                         free(var_info);
1433                         var_info = NULL;
1434                 }
1435                 if (line_info != NULL) {
1436                         while (!SLIST_EMPTY(line_info)) {
1437                                 lie = SLIST_FIRST(line_info);
1438                                 SLIST_REMOVE_HEAD(line_info, entries);
1439                                 free(lie->file);
1440                                 free(lie);
1441                         }
1442                         free(line_info);
1443                         line_info = NULL;
1444                 }
1445         }
1446
1447         if (sec_table != NULL)
1448                 for (i = 0; i < shnum; ++i)
1449                         free(sec_table[i]);
1450         free(sec_table);
1451         free(type_table);
1452
1453         sym_list_dest(&list_head);
1454
1455         return (rtn);
1456
1457 #undef  OBJNAME
1458 }
1459
1460 static int
1461 read_object(const char *filename)
1462 {
1463         Elf *elf, *arf;
1464         Elf_Cmd elf_cmd;
1465         Elf_Kind kind;
1466         int fd, rtn, e_err;
1467
1468         assert(filename != NULL && "filename is null");
1469
1470         if ((fd = open(filename, O_RDONLY)) == -1) {
1471                 warn("'%s'", filename);
1472                 return (1);
1473         }
1474
1475         elf_cmd = ELF_C_READ;
1476         if ((arf = elf_begin(fd, elf_cmd, (Elf *) NULL)) == NULL) {
1477                 if ((e_err = elf_errno()) != 0)
1478                         warnx("elf_begin error: %s", elf_errmsg(e_err));
1479                 else
1480                         warnx("elf_begin error");
1481                 close(fd);
1482                 return (1);
1483         }
1484
1485         assert(arf != NULL && "arf is null.");
1486
1487         rtn = 0;
1488         if ((kind = elf_kind(arf)) == ELF_K_NONE) {
1489                 warnx("%s: File format not recognized", filename);
1490                 elf_end(arf);
1491                 close(fd);
1492                 return (1);
1493         }
1494         if (kind == ELF_K_AR) {
1495                 if (nm_opts.print_name == PRINT_NAME_MULTI &&
1496                     nm_opts.elem_print_fn == sym_elem_print_all)
1497                         printf("\n%s:\n", filename);
1498                 if (nm_opts.print_armap == true)
1499                         print_ar_index(fd, arf);
1500         }
1501
1502         while ((elf = elf_begin(fd, elf_cmd, arf)) != NULL) {
1503                 rtn |= read_elf(elf, filename, kind);
1504
1505                 /*
1506                  * If file is not archive, elf_next return ELF_C_NULL and
1507                  * stop the loop.
1508                  */
1509                 elf_cmd = elf_next(elf);
1510                 elf_end(elf);
1511         }
1512
1513         elf_end(arf);
1514         close(fd);
1515
1516         return (rtn);
1517 }
1518
1519 static int
1520 read_files(int argc, char **argv)
1521 {
1522         int rtn = 0;
1523
1524         if (argc < 0 || argv == NULL)
1525                 return (1);
1526
1527         if (argc == 0)
1528                 rtn |= read_object(nm_info.def_filename);
1529         else {
1530                 if (nm_opts.print_name == PRINT_NAME_NONE && argc > 1)
1531                         nm_opts.print_name = PRINT_NAME_MULTI;
1532                 while (argc > 0) {
1533                         rtn |= read_object(*argv);
1534                         --argc;
1535                         ++argv;
1536                 }
1537         }
1538
1539         return (rtn);
1540 }
1541
1542 static void
1543 print_lineno(struct sym_entry *ep, struct func_info_head *func_info,
1544     struct var_info_head *var_info, struct line_info_head *line_info)
1545 {
1546         struct func_info_entry *func;
1547         struct var_info_entry *var;
1548         struct line_info_entry *lie;
1549
1550         /* For function symbol, search the function line information list.  */
1551         if ((ep->sym->st_info & 0xf) == STT_FUNC && func_info != NULL) {
1552                 SLIST_FOREACH(func, func_info, entries) {
1553                         if (func->name != NULL &&
1554                             !strcmp(ep->name, func->name) &&
1555                             ep->sym->st_value >= func->lowpc &&
1556                             ep->sym->st_value < func->highpc) {
1557                                 printf("\t%s:%" PRIu64, func->file, func->line);
1558                                 return;
1559                         }
1560                 }
1561         }
1562
1563         /* For variable symbol, search the variable line information list.  */
1564         if ((ep->sym->st_info & 0xf) == STT_OBJECT && var_info != NULL) {
1565                 SLIST_FOREACH(var, var_info, entries) {
1566                         if (!strcmp(ep->name, var->name) &&
1567                             ep->sym->st_value == var->addr) {
1568                                 printf("\t%s:%" PRIu64, var->file, var->line);
1569                                 return;
1570                         }
1571                 }
1572         }
1573
1574         /* Otherwise search line number information the .debug_line section. */
1575         if (line_info != NULL) {
1576                 SLIST_FOREACH(lie, line_info, entries) {
1577                         if (ep->sym->st_value == lie->addr) {
1578                                 printf("\t%s:%" PRIu64, lie->file, lie->line);
1579                                 return;
1580                         }
1581                 }
1582         }
1583 }
1584
1585 static void
1586 set_opt_value_print_fn(enum radix t)
1587 {
1588
1589         switch (t) {
1590         case RADIX_OCT:
1591                 nm_opts.value_print_fn = &sym_value_oct_print;
1592                 nm_opts.size_print_fn = &sym_size_oct_print;
1593
1594                 break;
1595         case RADIX_DEC:
1596                 nm_opts.value_print_fn = &sym_value_dec_print;
1597                 nm_opts.size_print_fn = &sym_size_dec_print;
1598
1599                 break;
1600         case RADIX_HEX:
1601         default :
1602                 nm_opts.value_print_fn = &sym_value_hex_print;
1603                 nm_opts.size_print_fn  = &sym_size_hex_print;
1604         }
1605
1606         assert(nm_opts.value_print_fn != NULL &&
1607             "nm_opts.value_print_fn is null");
1608 }
1609
1610 static void
1611 sym_elem_print_all(char type, const char *sec, const GElf_Sym *sym,
1612     const char *name)
1613 {
1614
1615         if (sec == NULL || sym == NULL || name == NULL ||
1616             nm_opts.value_print_fn == NULL)
1617                 return;
1618
1619         if (IS_UNDEF_SYM_TYPE(type)) {
1620                 if (nm_opts.t == RADIX_HEX && nm_elfclass == ELFCLASS32)
1621                         printf("%-8s", "");
1622                 else
1623                         printf("%-16s", "");
1624         } else {
1625                 switch ((nm_opts.sort_fn == & cmp_size ? 2 : 0) +
1626                     nm_opts.print_size) {
1627                 case 3:
1628                         if (sym->st_size != 0) {
1629                                 nm_opts.value_print_fn(sym);
1630                                 printf(" ");
1631                                 nm_opts.size_print_fn(sym);
1632                         }
1633                         break;
1634
1635                 case 2:
1636                         if (sym->st_size != 0)
1637                                 nm_opts.size_print_fn(sym);
1638                         break;
1639
1640                 case 1:
1641                         nm_opts.value_print_fn(sym);
1642                         if (sym->st_size != 0) {
1643                                 printf(" ");
1644                                 nm_opts.size_print_fn(sym);
1645                         }
1646                         break;
1647
1648                 case 0:
1649                 default:
1650                         nm_opts.value_print_fn(sym);
1651                 }
1652         }
1653
1654         printf(" %c ", type);
1655         PRINT_DEMANGLED_NAME("%s", name);
1656 }
1657
1658 static void
1659 sym_elem_print_all_portable(char type, const char *sec, const GElf_Sym *sym,
1660     const char *name)
1661 {
1662
1663         if (sec == NULL || sym == NULL || name == NULL ||
1664             nm_opts.value_print_fn == NULL)
1665                 return;
1666
1667         PRINT_DEMANGLED_NAME("%s", name);
1668         printf(" %c ", type);
1669         if (!IS_UNDEF_SYM_TYPE(type)) {
1670                 nm_opts.value_print_fn(sym);
1671                 printf(" ");
1672                 if (sym->st_size != 0)
1673                         nm_opts.size_print_fn(sym);
1674         } else
1675                 printf("        ");
1676 }
1677
1678 static void
1679 sym_elem_print_all_sysv(char type, const char *sec, const GElf_Sym *sym,
1680     const char *name)
1681 {
1682
1683         if (sec == NULL || sym == NULL || name == NULL ||
1684             nm_opts.value_print_fn == NULL)
1685                 return;
1686
1687         PRINT_DEMANGLED_NAME("%-20s|", name);
1688         if (IS_UNDEF_SYM_TYPE(type))
1689                 printf("                ");
1690         else
1691                 nm_opts.value_print_fn(sym);
1692
1693         printf("|   %c  |", type);
1694
1695         switch (sym->st_info & 0xf) {
1696         case STT_OBJECT:
1697                 printf("%18s|", "OBJECT");
1698                 break;
1699
1700         case STT_FUNC:
1701                 printf("%18s|", "FUNC");
1702                 break;
1703
1704         case STT_SECTION:
1705                 printf("%18s|", "SECTION");
1706                 break;
1707
1708         case STT_FILE:
1709                 printf("%18s|", "FILE");
1710                 break;
1711
1712         case STT_LOPROC:
1713                 printf("%18s|", "LOPROC");
1714                 break;
1715
1716         case STT_HIPROC:
1717                 printf("%18s|", "HIPROC");
1718                 break;
1719
1720         case STT_NOTYPE:
1721         default:
1722                 printf("%18s|", "NOTYPE");
1723         }
1724
1725         if (sym->st_size != 0)
1726                 nm_opts.size_print_fn(sym);
1727         else
1728                 printf("                ");
1729
1730         printf("|     |%s", sec);
1731 }
1732
1733 static int
1734 sym_elem_def(char type, const GElf_Sym *sym, const char *name)
1735 {
1736
1737         assert(IS_SYM_TYPE((unsigned char) type));
1738
1739         UNUSED(sym);
1740         UNUSED(name);
1741
1742         return (!IS_UNDEF_SYM_TYPE((unsigned char) type));
1743 }
1744
1745 static int
1746 sym_elem_global(char type, const GElf_Sym *sym, const char *name)
1747 {
1748
1749         assert(IS_SYM_TYPE((unsigned char) type));
1750
1751         UNUSED(sym);
1752         UNUSED(name);
1753
1754         /* weak symbols resemble global. */
1755         return (isupper((unsigned char) type) || type == 'w');
1756 }
1757
1758 static int
1759 sym_elem_global_static(char type, const GElf_Sym *sym, const char *name)
1760 {
1761         unsigned char info;
1762
1763         assert(sym != NULL);
1764
1765         UNUSED(type);
1766         UNUSED(name);
1767
1768         info = sym->st_info >> 4;
1769
1770         return (info == STB_LOCAL ||
1771             info == STB_GLOBAL ||
1772             info == STB_WEAK);
1773 }
1774
1775 static int
1776 sym_elem_nondebug(char type, const GElf_Sym *sym, const char *name)
1777 {
1778
1779         assert(sym != NULL);
1780
1781         UNUSED(type);
1782         UNUSED(name);
1783
1784         if (sym->st_value == 0 && (sym->st_info & 0xf) == STT_FILE)
1785                 return (0);
1786         if (sym->st_name == 0)
1787                 return (0);
1788
1789         return (1);
1790 }
1791
1792 static int
1793 sym_elem_nonzero_size(char type, const GElf_Sym *sym, const char *name)
1794 {
1795
1796         assert(sym != NULL);
1797
1798         UNUSED(type);
1799         UNUSED(name);
1800
1801         return (sym->st_size > 0);
1802 }
1803
1804 static int
1805 sym_elem_undef(char type, const GElf_Sym *sym, const char *name)
1806 {
1807
1808         assert(IS_SYM_TYPE((unsigned char) type));
1809
1810         UNUSED(sym);
1811         UNUSED(name);
1812
1813         return (IS_UNDEF_SYM_TYPE((unsigned char) type));
1814 }
1815
1816 static void
1817 sym_list_dest(struct sym_head *headp)
1818 {
1819         struct sym_entry *ep, *ep_n;
1820
1821         if (headp == NULL)
1822                 return;
1823
1824         ep = STAILQ_FIRST(headp);
1825         while (ep != NULL) {
1826                 ep_n = STAILQ_NEXT(ep, sym_entries);
1827                 free(ep->sym);
1828                 free(ep->name);
1829                 free(ep);
1830                 ep = ep_n;
1831         }
1832 }
1833
1834 static int
1835 sym_list_insert(struct sym_head *headp, const char *name, const GElf_Sym *sym)
1836 {
1837         struct sym_entry *e;
1838
1839         if (headp == NULL || name == NULL || sym == NULL)
1840                 return (0);
1841         if ((e = malloc(sizeof(struct sym_entry))) == NULL) {
1842                 warn("malloc");
1843                 return (0);
1844         }
1845         if ((e->name = strdup(name)) == NULL) {
1846                 warn("strdup");
1847                 free(e);
1848                 return (0);
1849         }
1850         if ((e->sym = malloc(sizeof(GElf_Sym))) == NULL) {
1851                 warn("malloc");
1852                 free(e->name);
1853                 free(e);
1854                 return (0);
1855         }
1856
1857         memcpy(e->sym, sym, sizeof(GElf_Sym));
1858
1859         /* Display size instead of value for common symbol. */
1860         if (sym->st_shndx == SHN_COMMON)
1861                 e->sym->st_value = sym->st_size;
1862
1863         STAILQ_INSERT_TAIL(headp, e, sym_entries);
1864
1865         return (1);
1866 }
1867
1868 /* If file has not .debug_info, line_info will be NULL */
1869 static void
1870 sym_list_print(struct sym_print_data *p, struct func_info_head *func_info,
1871     struct var_info_head *var_info, struct line_info_head *line_info)
1872 {
1873         struct sym_entry *e_v;
1874         size_t si;
1875         int i;
1876
1877         if (p == NULL || CHECK_SYM_PRINT_DATA(p))
1878                 return;
1879         if ((e_v = sym_list_sort(p)) == NULL)
1880                 return;
1881         if (nm_opts.sort_reverse == false)
1882                 for (si = 0; si != p->list_num; ++si)
1883                         sym_list_print_each(&e_v[si], p, func_info, var_info,
1884                             line_info);
1885         else
1886                 for (i = p->list_num - 1; i != -1; --i)
1887                         sym_list_print_each(&e_v[i], p, func_info, var_info,
1888                             line_info);
1889
1890         free(e_v);
1891 }
1892
1893 /* If file has not .debug_info, line_info will be NULL */
1894 static void
1895 sym_list_print_each(struct sym_entry *ep, struct sym_print_data *p,
1896     struct func_info_head *func_info, struct var_info_head *var_info,
1897     struct line_info_head *line_info)
1898 {
1899         const char *sec;
1900         char type;
1901
1902         if (ep == NULL || CHECK_SYM_PRINT_DATA(p))
1903                 return;
1904
1905         assert(ep->name != NULL);
1906         assert(ep->sym != NULL);
1907
1908         type = get_sym_type(ep->sym, p->t_table);
1909
1910         if (nm_opts.print_name == PRINT_NAME_FULL) {
1911                 printf("%s", p->filename);
1912                 if (nm_opts.elem_print_fn == &sym_elem_print_all_portable) {
1913                         if (p->objname != NULL)
1914                                 printf("[%s]", p->objname);
1915                         printf(": ");
1916                 } else {
1917                         if (p->objname != NULL)
1918                                 printf(":%s", p->objname);
1919                         printf(":");
1920                 }
1921         }
1922
1923         switch (ep->sym->st_shndx) {
1924         case SHN_LOPROC:
1925                 /* LOPROC or LORESERVE */
1926                 sec = "*LOPROC*";
1927                 break;
1928         case SHN_HIPROC:
1929                 sec = "*HIPROC*";
1930                 break;
1931         case SHN_LOOS:
1932                 sec = "*LOOS*";
1933                 break;
1934         case SHN_HIOS:
1935                 sec = "*HIOS*";
1936                 break;
1937         case SHN_ABS:
1938                 sec = "*ABS*";
1939                 break;
1940         case SHN_COMMON:
1941                 sec = "*COM*";
1942                 break;
1943         case SHN_HIRESERVE:
1944                 /* HIRESERVE or XINDEX */
1945                 sec = "*HIRESERVE*";
1946                 break;
1947         default:
1948                 if (ep->sym->st_shndx > p->sh_num)
1949                         return;
1950                 sec = p->s_table[ep->sym->st_shndx];
1951                 break;
1952         }
1953
1954         nm_opts.elem_print_fn(type, sec, ep->sym, ep->name);
1955
1956         if (nm_opts.debug_line == true && !IS_UNDEF_SYM_TYPE(type))
1957                 print_lineno(ep, func_info, var_info, line_info);
1958
1959         printf("\n");
1960 }
1961
1962 static struct sym_entry *
1963 sym_list_sort(struct sym_print_data *p)
1964 {
1965         struct sym_entry *ep, *e_v;
1966         int idx;
1967
1968         if (p == NULL || CHECK_SYM_PRINT_DATA(p))
1969                 return (NULL);
1970
1971         if ((e_v = malloc(sizeof(struct sym_entry) * p->list_num)) == NULL) {
1972                 warn("malloc");
1973                 return (NULL);
1974         }
1975
1976         idx = 0;
1977         STAILQ_FOREACH(ep, p->headp, sym_entries) {
1978                 if (ep->name != NULL && ep->sym != NULL) {
1979                         e_v[idx].name = ep->name;
1980                         e_v[idx].sym = ep->sym;
1981                         ++idx;
1982                 }
1983         }
1984
1985         assert((size_t)idx == p->list_num);
1986
1987         if (nm_opts.sort_fn != &cmp_none) {
1988                 nm_print_data = p;
1989                 assert(nm_print_data != NULL);
1990                 qsort(e_v, p->list_num, sizeof(struct sym_entry),
1991                     nm_opts.sort_fn);
1992         }
1993
1994         return (e_v);
1995 }
1996
1997 static void
1998 sym_size_oct_print(const GElf_Sym *sym)
1999 {
2000
2001         assert(sym != NULL && "sym is null");
2002         printf("%016" PRIo64, sym->st_size);
2003 }
2004
2005 static void
2006 sym_size_hex_print(const GElf_Sym *sym)
2007 {
2008
2009         assert(sym != NULL && "sym is null");
2010         if (nm_elfclass == ELFCLASS32)
2011                 printf("%08" PRIx64, sym->st_size);
2012         else
2013                 printf("%016" PRIx64, sym->st_size);
2014 }
2015
2016 static void
2017 sym_size_dec_print(const GElf_Sym *sym)
2018 {
2019
2020         assert(sym != NULL && "sym is null");
2021         printf("%016" PRId64, sym->st_size);
2022 }
2023
2024 static void
2025 sym_value_oct_print(const GElf_Sym *sym)
2026 {
2027
2028         assert(sym != NULL && "sym is null");
2029         printf("%016" PRIo64, sym->st_value);
2030 }
2031
2032 static void
2033 sym_value_hex_print(const GElf_Sym *sym)
2034 {
2035
2036         assert(sym != NULL && "sym is null");
2037         if (nm_elfclass == ELFCLASS32)
2038                 printf("%08" PRIx64, sym->st_value);
2039         else
2040                 printf("%016" PRIx64, sym->st_value);
2041 }
2042
2043 static void
2044 sym_value_dec_print(const GElf_Sym *sym)
2045 {
2046
2047         assert(sym != NULL && "sym is null");
2048         printf("%016" PRId64, sym->st_value);
2049 }
2050
2051 static void
2052 usage(int exitcode)
2053 {
2054
2055         printf("Usage: %s [options] file ...\
2056 \n  Display symbolic information in file.\n\
2057 \n  Options: \
2058 \n  -A, --print-file-name     Write the full pathname or library name of an\
2059 \n                            object on each line.\
2060 \n  -a, --debug-syms          Display all symbols include debugger-only\
2061 \n                            symbols.", nm_info.name);
2062         printf("\
2063 \n  -B                        Equivalent to specifying \"--format=bsd\".\
2064 \n  -C, --demangle[=style]    Decode low-level symbol names.\
2065 \n      --no-demangle         Do not demangle low-level symbol names.\
2066 \n  -D, --dynamic             Display only dynamic symbols.\
2067 \n  -e                        Display only global and static symbols.");
2068         printf("\
2069 \n  -f                        Produce full output (default).\
2070 \n      --format=format       Display output in specific format.  Allowed\
2071 \n                            formats are: \"bsd\", \"posix\" and \"sysv\".\
2072 \n  -g, --extern-only         Display only global symbol information.\
2073 \n  -h, --help                Show this help message.\
2074 \n  -l, --line-numbers        Display filename and linenumber using\
2075 \n                            debugging information.\
2076 \n  -n, --numeric-sort        Sort symbols numerically by value.");
2077         printf("\
2078 \n  -o                        Write numeric values in octal. Equivalent to\
2079 \n                            specifying \"-t o\".\
2080 \n  -p, --no-sort             Do not sort symbols.\
2081 \n  -P                        Write information in a portable output format.\
2082 \n                            Equivalent to specifying \"--format=posix\".\
2083 \n  -r, --reverse-sort        Reverse the order of the sort.\
2084 \n  -S, --print-size          Print symbol sizes instead values.\
2085 \n  -s, --print-armap         Include an index of archive members.\
2086 \n      --size-sort           Sort symbols by size.");
2087         printf("\
2088 \n  -t, --radix=format        Write each numeric value in the specified\
2089 \n                            format:\
2090 \n                               d   In decimal,\
2091 \n                               o   In octal,\
2092 \n                               x   In hexadecimal.");
2093         printf("\
2094 \n  -u, --undefined-only      Display only undefined symbols.\
2095 \n      --defined-only        Display only defined symbols.\
2096 \n  -V, --version             Show the version identifier for %s.\
2097 \n  -v                        Sort output by value.\
2098 \n  -x                        Write numeric values in hexadecimal.\
2099 \n                            Equivalent to specifying \"-t x\".",
2100             nm_info.name);
2101         printf("\n\
2102 \n  The default options are: output in bsd format, use a hexadecimal radix,\
2103 \n  sort by symbol name, do not demangle names.\n");
2104
2105         exit(exitcode);
2106 }
2107
2108 /*
2109  * Display symbolic information in file.
2110  * Return 0 at success, >0 at failed.
2111  */
2112 int
2113 main(int argc, char **argv)
2114 {
2115         int rtn;
2116
2117         global_init();
2118         get_opt(argc, argv);
2119         rtn = read_files(argc - optind, argv + optind);
2120         global_dest();
2121
2122         exit(rtn);
2123 }