Line data Source code
1 : /* Print symbol information from ELF file in human-readable form.
2 : Copyright (C) 2000-2008, 2009, 2011, 2012, 2014, 2015, 2020 Red Hat, Inc.
3 : This file is part of elfutils.
4 : Written by Ulrich Drepper <drepper@redhat.com>, 2000.
5 :
6 : This file is free software; you can redistribute it and/or modify
7 : it under the terms of the GNU General Public License as published by
8 : the Free Software Foundation; either version 3 of the License, or
9 : (at your option) any later version.
10 :
11 : elfutils is distributed in the hope that it will be useful, but
12 : WITHOUT ANY WARRANTY; without even the implied warranty of
13 : MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 : GNU General Public License for more details.
15 :
16 : You should have received a copy of the GNU General Public License
17 : along with this program. If not, see <http://www.gnu.org/licenses/>. */
18 :
19 : #ifdef HAVE_CONFIG_H
20 : # include <config.h>
21 : #endif
22 :
23 : #include <ar.h>
24 : #include <argp.h>
25 : #include <assert.h>
26 : #include <ctype.h>
27 : #include <dwarf.h>
28 : #include <errno.h>
29 : #include <fcntl.h>
30 : #include <gelf.h>
31 : #include <inttypes.h>
32 : #include <libdw.h>
33 : #include <libintl.h>
34 : #include <locale.h>
35 : #include <obstack.h>
36 : #include <search.h>
37 : #include <stdbool.h>
38 : #include <stdio.h>
39 : #include <stdio_ext.h>
40 : #include <stdlib.h>
41 : #include <string.h>
42 : #include <unistd.h>
43 :
44 : #include <libeu.h>
45 : #include <system.h>
46 : #include <color.h>
47 : #include <printversion.h>
48 : #include "../libebl/libeblP.h"
49 : #include "../libdwfl/libdwflP.h"
50 :
51 :
52 : /* Name and version of program. */
53 : ARGP_PROGRAM_VERSION_HOOK_DEF = print_version;
54 :
55 : /* Bug report address. */
56 : ARGP_PROGRAM_BUG_ADDRESS_DEF = PACKAGE_BUGREPORT;
57 :
58 :
59 : /* Values for the parameters which have no short form. */
60 : #define OPT_DEFINED 0x100
61 : #define OPT_MARK_SPECIAL 0x101
62 :
63 : /* Definitions of arguments for argp functions. */
64 : static const struct argp_option options[] =
65 : {
66 : { NULL, 0, NULL, 0, N_("Output selection:"), 0 },
67 : { "debug-syms", 'a', NULL, 0, N_("Display debugger-only symbols"), 0 },
68 : { "defined-only", OPT_DEFINED, NULL, 0, N_("Display only defined symbols"),
69 : 0 },
70 : { "dynamic", 'D', NULL, 0,
71 : N_("Display dynamic symbols instead of normal symbols"), 0 },
72 : { "extern-only", 'g', NULL, 0, N_("Display only external symbols"), 0 },
73 : { "undefined-only", 'u', NULL, 0, N_("Display only undefined symbols"), 0 },
74 : { "print-armap", 's', NULL, 0,
75 : N_("Include index for symbols from archive members"), 0 },
76 :
77 : { NULL, 0, NULL, 0, N_("Output format:"), 0 },
78 : { "print-file-name", 'A', NULL, 0,
79 : N_("Print name of the input file before every symbol"), 0 },
80 : { NULL, 'o', NULL, OPTION_HIDDEN, "Same as -A", 0 },
81 : { "format", 'f', "FORMAT", 0,
82 : N_("Use the output format FORMAT. FORMAT can be `bsd', `sysv' or `posix'. The default is `sysv'"),
83 : 0 },
84 : { NULL, 'B', NULL, 0, N_("Same as --format=bsd"), 0 },
85 : { "portability", 'P', NULL, 0, N_("Same as --format=posix"), 0 },
86 : { "radix", 't', "RADIX", 0, N_("Use RADIX for printing symbol values"), 0 },
87 : { "mark-special", OPT_MARK_SPECIAL, NULL, 0, N_("Mark special symbols"), 0 },
88 : { "mark-weak", OPT_MARK_SPECIAL, NULL, OPTION_HIDDEN, "", 0 },
89 : { "print-size", 'S', NULL, 0, N_("Print size of defined symbols"), 0 },
90 :
91 : { NULL, 0, NULL, 0, N_("Output options:"), 0 },
92 : { "numeric-sort", 'n', NULL, 0, N_("Sort symbols numerically by address"),
93 : 0 },
94 : { "no-sort", 'p', NULL, 0, N_("Do not sort the symbols"), 0 },
95 : { "reverse-sort", 'r', NULL, 0, N_("Reverse the sense of the sort"), 0 },
96 : #ifdef USE_DEMANGLE
97 : { "demangle", 'C', NULL, 0,
98 : N_("Decode low-level symbol names into source code names"), 0 },
99 : #endif
100 : { NULL, 0, NULL, 0, N_("Miscellaneous:"), 0 },
101 : { NULL, 0, NULL, 0, NULL, 0 }
102 : };
103 :
104 : /* Short description of program. */
105 : static const char doc[] = N_("List symbols from FILEs (a.out by default).");
106 :
107 : /* Strings for arguments in help texts. */
108 : static const char args_doc[] = N_("[FILE...]");
109 :
110 : /* Prototype for option handler. */
111 : static error_t parse_opt (int key, char *arg, struct argp_state *state);
112 :
113 : /* Parser children. */
114 : static struct argp_child argp_children[] =
115 : {
116 : { &color_argp, 0, N_("Output formatting"), 2 },
117 : { NULL, 0, NULL, 0}
118 : };
119 :
120 : /* Data structure to communicate with argp functions. */
121 : static struct argp argp =
122 : {
123 : options, parse_opt, args_doc, doc, argp_children, NULL, NULL
124 : };
125 :
126 :
127 : /* Print symbols in file named FNAME. */
128 : static int process_file (const char *fname, bool more_than_one);
129 :
130 : /* Handle content of archive. */
131 : static int handle_ar (int fd, Elf *elf, const char *prefix, const char *fname,
132 : const char *suffix);
133 :
134 : /* Handle ELF file. */
135 : static int handle_elf (int fd, Elf *elf, const char *prefix, const char *fname,
136 : const char *suffix);
137 :
138 :
139 : #define INTERNAL_ERROR(fname) \
140 : error (EXIT_FAILURE, 0, gettext ("%s: INTERNAL ERROR %d (%s): %s"), \
141 : fname, __LINE__, PACKAGE_VERSION, elf_errmsg (-1))
142 :
143 :
144 : /* Internal representation of symbols. */
145 : typedef struct GElf_SymX
146 : {
147 : GElf_Sym sym;
148 : Elf32_Word xndx;
149 : char *where;
150 : } GElf_SymX;
151 :
152 :
153 : /* User-selectable options. */
154 :
155 : /* The selected output format. */
156 : static enum
157 : {
158 : format_sysv = 0,
159 : format_bsd,
160 : format_posix
161 : } format;
162 :
163 : /* Print defined, undefined, or both? */
164 : static bool hide_undefined;
165 : static bool hide_defined;
166 :
167 : /* Print local symbols also? */
168 : static bool hide_local;
169 :
170 : /* Nonzero if full filename should precede every symbol. */
171 : static bool print_file_name;
172 :
173 : /* If true print size of defined symbols in BSD format. */
174 : static bool print_size;
175 :
176 : /* If true print archive index. */
177 : static bool print_armap;
178 :
179 : /* If true reverse sorting. */
180 : static bool reverse_sort;
181 :
182 : #ifdef USE_DEMANGLE
183 : /* If true demangle symbols. */
184 : static bool demangle;
185 : #endif
186 :
187 : /* Type of the section we are printing. */
188 : static GElf_Word symsec_type = SHT_SYMTAB;
189 :
190 : /* Sorting selection. */
191 : static enum
192 : {
193 : sort_name = 0,
194 : sort_numeric,
195 : sort_nosort
196 : } sort;
197 :
198 : /* Radix for printed numbers. */
199 : static enum
200 : {
201 : radix_hex = 0,
202 : radix_decimal,
203 : radix_octal
204 : } radix;
205 :
206 : /* If nonzero mark special symbols:
207 : - weak symbols are distinguished from global symbols by adding
208 : a `*' after the identifying letter for the symbol class and type.
209 : - TLS symbols are distinguished from normal symbols by adding
210 : a '@' after the identifying letter for the symbol class and type. */
211 : static bool mark_special;
212 :
213 :
214 : int
215 106 : main (int argc, char *argv[])
216 : {
217 106 : int remaining;
218 106 : int result = 0;
219 :
220 : /* We use no threads here which can interfere with handling a stream. */
221 106 : (void) __fsetlocking (stdin, FSETLOCKING_BYCALLER);
222 106 : (void) __fsetlocking (stdout, FSETLOCKING_BYCALLER);
223 106 : (void) __fsetlocking (stderr, FSETLOCKING_BYCALLER);
224 :
225 : /* Set locale. */
226 106 : (void) setlocale (LC_ALL, "");
227 :
228 : /* Make sure the message catalog can be found. */
229 106 : (void) bindtextdomain (PACKAGE_TARNAME, LOCALEDIR);
230 :
231 : /* Initialize the message catalog. */
232 106 : (void) textdomain (PACKAGE_TARNAME);
233 :
234 : /* Parse and process arguments. */
235 106 : (void) argp_parse (&argp, argc, argv, 0, &remaining, NULL);
236 :
237 : /* Tell the library which version we are expecting. */
238 106 : (void) elf_version (EV_CURRENT);
239 :
240 106 : if (remaining == argc)
241 : /* The user didn't specify a name so we use a.out. */
242 0 : result = process_file ("a.out", false);
243 : else
244 : {
245 : /* Process all the remaining files. */
246 106 : const bool more_than_one = remaining + 1 < argc;
247 :
248 106 : do
249 106 : result |= process_file (argv[remaining], more_than_one);
250 106 : while (++remaining < argc);
251 : }
252 :
253 106 : return result;
254 : }
255 :
256 :
257 : /* Handle program arguments. */
258 : static error_t
259 835 : parse_opt (int key, char *arg,
260 : struct argp_state *state __attribute__ ((unused)))
261 : {
262 835 : switch (key)
263 : {
264 : case 'a':
265 : /* XXX */
266 : break;
267 :
268 : #ifdef USE_DEMANGLE
269 0 : case 'C':
270 0 : demangle = true;
271 0 : break;
272 : #endif
273 :
274 105 : case 'f':
275 105 : if (strcmp (arg, "bsd") == 0)
276 35 : format = format_bsd;
277 70 : else if (strcmp (arg, "posix") == 0)
278 35 : format = format_posix;
279 : else
280 : /* Be bug compatible. The BFD implementation also defaulted to
281 : using the SysV format if nothing else matches. */
282 35 : format = format_sysv;
283 : break;
284 :
285 28 : case 'g':
286 28 : hide_local = true;
287 28 : break;
288 :
289 33 : case 'n':
290 33 : sort = sort_numeric;
291 33 : break;
292 :
293 33 : case 'p':
294 33 : sort = sort_nosort;
295 33 : break;
296 :
297 0 : case 't':
298 0 : if (strcmp (arg, "10") == 0 || strcmp (arg, "d") == 0)
299 0 : radix = radix_decimal;
300 0 : else if (strcmp (arg, "8") == 0 || strcmp (arg, "o") == 0)
301 0 : radix = radix_octal;
302 : else
303 0 : radix = radix_hex;
304 : break;
305 :
306 0 : case 'u':
307 0 : hide_undefined = false;
308 0 : hide_defined = true;
309 0 : break;
310 :
311 0 : case 'A':
312 : case 'o':
313 0 : print_file_name = true;
314 0 : break;
315 :
316 0 : case 'B':
317 0 : format = format_bsd;
318 0 : break;
319 :
320 18 : case 'D':
321 18 : symsec_type = SHT_DYNSYM;
322 18 : break;
323 :
324 1 : case 'P':
325 1 : format = format_posix;
326 1 : break;
327 :
328 27 : case OPT_DEFINED:
329 27 : hide_undefined = true;
330 27 : hide_defined = false;
331 27 : break;
332 :
333 0 : case OPT_MARK_SPECIAL:
334 0 : mark_special = true;
335 0 : break;
336 :
337 0 : case 'S':
338 0 : print_size = true;
339 0 : break;
340 :
341 0 : case 's':
342 0 : print_armap = true;
343 0 : break;
344 :
345 33 : case 'r':
346 33 : reverse_sort = true;
347 33 : break;
348 :
349 : default:
350 : return ARGP_ERR_UNKNOWN;
351 : }
352 : return 0;
353 : }
354 :
355 :
356 : /* Open the file and determine the type. */
357 : static int
358 106 : process_file (const char *fname, bool more_than_one)
359 : {
360 : /* Open the file. */
361 106 : int fd = open (fname, O_RDONLY);
362 106 : if (fd == -1)
363 : {
364 0 : error (0, errno, gettext ("cannot open '%s'"), fname);
365 0 : return 1;
366 : }
367 :
368 : /* Now get the ELF descriptor. */
369 106 : Elf *elf = elf_begin (fd, ELF_C_READ_MMAP, NULL);
370 106 : if (elf != NULL)
371 : {
372 106 : if (elf_kind (elf) == ELF_K_ELF)
373 : {
374 210 : int result = handle_elf (fd, elf, more_than_one ? "" : NULL,
375 : fname, NULL);
376 :
377 105 : if (elf_end (elf) != 0)
378 0 : INTERNAL_ERROR (fname);
379 :
380 105 : if (close (fd) != 0)
381 0 : error (EXIT_FAILURE, errno, gettext ("while closing '%s'"), fname);
382 :
383 : return result;
384 : }
385 1 : else if (elf_kind (elf) == ELF_K_AR)
386 : {
387 1 : int result = handle_ar (fd, elf, NULL, fname, NULL);
388 :
389 1 : if (elf_end (elf) != 0)
390 0 : INTERNAL_ERROR (fname);
391 :
392 1 : if (close (fd) != 0)
393 0 : error (EXIT_FAILURE, errno, gettext ("while closing '%s'"), fname);
394 :
395 : return result;
396 : }
397 :
398 : /* We cannot handle this type. Close the descriptor anyway. */
399 0 : if (elf_end (elf) != 0)
400 0 : INTERNAL_ERROR (fname);
401 : }
402 :
403 0 : error (0, 0, gettext ("%s: File format not recognized"), fname);
404 :
405 0 : return 1;
406 : }
407 :
408 :
409 : static int
410 1 : handle_ar (int fd, Elf *elf, const char *prefix, const char *fname,
411 : const char *suffix)
412 1 : {
413 1 : size_t fname_len = strlen (fname) + 1;
414 1 : size_t prefix_len = prefix != NULL ? strlen (prefix) : 0;
415 1 : char new_prefix[prefix_len + fname_len + 2];
416 1 : size_t suffix_len = suffix != NULL ? strlen (suffix) : 0;
417 1 : char new_suffix[suffix_len + 2];
418 1 : Elf *subelf;
419 1 : Elf_Cmd cmd = ELF_C_READ_MMAP;
420 1 : int result = 0;
421 :
422 1 : char *cp = new_prefix;
423 1 : if (prefix != NULL)
424 0 : cp = stpcpy (cp, prefix);
425 1 : cp = stpcpy (cp, fname);
426 1 : stpcpy (cp, "[");
427 :
428 1 : cp = new_suffix;
429 1 : if (suffix != NULL)
430 0 : cp = stpcpy (cp, suffix);
431 1 : stpcpy (cp, "]");
432 :
433 : /* First print the archive index if this is wanted. */
434 1 : if (print_armap)
435 : {
436 0 : Elf_Arsym *arsym = elf_getarsym (elf, NULL);
437 :
438 0 : if (arsym != NULL)
439 : {
440 0 : Elf_Arhdr *arhdr = NULL;
441 0 : size_t arhdr_off = 0; /* Note: 0 is no valid offset. */
442 :
443 0 : fputs_unlocked (gettext("\nArchive index:\n"), stdout);
444 :
445 0 : while (arsym->as_off != 0)
446 : {
447 0 : if (arhdr_off != arsym->as_off
448 0 : && (elf_rand (elf, arsym->as_off) != arsym->as_off
449 0 : || (subelf = elf_begin (fd, cmd, elf)) == NULL
450 0 : || (arhdr = elf_getarhdr (subelf)) == NULL))
451 : {
452 0 : error (0, 0, gettext ("invalid offset %zu for symbol %s"),
453 : arsym->as_off, arsym->as_name);
454 : break;
455 : }
456 :
457 0 : printf (gettext ("%s in %s\n"), arsym->as_name, arhdr->ar_name);
458 :
459 0 : ++arsym;
460 : }
461 :
462 0 : if (elf_rand (elf, SARMAG) != SARMAG)
463 : {
464 0 : error (0, 0,
465 0 : gettext ("cannot reset archive offset to beginning"));
466 0 : return 1;
467 : }
468 : }
469 : }
470 :
471 : /* Process all the files contained in the archive. */
472 5 : while ((subelf = elf_begin (fd, cmd, elf)) != NULL)
473 : {
474 : /* The the header for this element. */
475 4 : Elf_Arhdr *arhdr = elf_getarhdr (subelf);
476 :
477 : /* Skip over the index entries. */
478 4 : if (strcmp (arhdr->ar_name, "/") != 0
479 4 : && strcmp (arhdr->ar_name, "//") != 0
480 4 : && strcmp (arhdr->ar_name, "/SYM64/") != 0)
481 : {
482 3 : if (elf_kind (subelf) == ELF_K_ELF)
483 3 : result |= handle_elf (fd, subelf, new_prefix, arhdr->ar_name,
484 : new_suffix);
485 0 : else if (elf_kind (subelf) == ELF_K_AR)
486 0 : result |= handle_ar (fd, subelf, new_prefix, arhdr->ar_name,
487 : new_suffix);
488 : else
489 : {
490 0 : error (0, 0, gettext ("%s%s%s: file format not recognized"),
491 : new_prefix, arhdr->ar_name, new_suffix);
492 0 : result = 1;
493 : }
494 : }
495 :
496 : /* Get next archive element. */
497 4 : cmd = elf_next (subelf);
498 4 : if (elf_end (subelf) != 0)
499 0 : INTERNAL_ERROR (fname);
500 : }
501 :
502 : return result;
503 : }
504 :
505 :
506 : /* Mapping of radix and binary class to length. */
507 : static const int length_map[2][3] =
508 : {
509 : [ELFCLASS32 - 1] =
510 : {
511 : [radix_hex] = 8,
512 : [radix_decimal] = 10,
513 : [radix_octal] = 11
514 : },
515 : [ELFCLASS64 - 1] =
516 : {
517 : [radix_hex] = 16,
518 : [radix_decimal] = 20,
519 : [radix_octal] = 22
520 : }
521 : };
522 :
523 :
524 : static int
525 0 : global_compare (const void *p1, const void *p2)
526 : {
527 0 : const Dwarf_Global *g1 = (const Dwarf_Global *) p1;
528 0 : const Dwarf_Global *g2 = (const Dwarf_Global *) p2;
529 :
530 0 : return strcmp (g1->name, g2->name);
531 : }
532 :
533 :
534 : static void *global_root;
535 :
536 :
537 : static int
538 0 : get_global (Dwarf *dbg __attribute__ ((unused)), Dwarf_Global *global,
539 : void *arg __attribute__ ((unused)))
540 : {
541 0 : tsearch (memcpy (xmalloc (sizeof (Dwarf_Global)), global,
542 : sizeof (Dwarf_Global)),
543 : &global_root, global_compare);
544 :
545 0 : return DWARF_CB_OK;
546 : }
547 :
548 :
549 : struct local_name
550 : {
551 : const char *name;
552 : const char *file;
553 : Dwarf_Word lineno;
554 : Dwarf_Addr lowpc;
555 : Dwarf_Addr highpc;
556 : };
557 :
558 :
559 : static int
560 458439 : local_compare (const void *p1, const void *p2)
561 : {
562 458439 : struct local_name *g1 = (struct local_name *) p1;
563 458439 : struct local_name *g2 = (struct local_name *) p2;
564 458439 : int result;
565 :
566 458439 : result = strcmp (g1->name, g2->name);
567 458439 : if (result == 0)
568 : {
569 18030 : if (g1->lowpc <= g2->lowpc && g1->highpc >= g2->highpc)
570 : {
571 : /* g2 is contained in g1. Update the data. */
572 1647 : g2->lowpc = g1->lowpc;
573 1647 : g2->highpc = g1->highpc;
574 1647 : result = 0;
575 : }
576 16383 : else if (g2->lowpc <= g1->lowpc && g2->highpc >= g1->highpc)
577 : {
578 : /* g1 is contained in g2. Update the data. */
579 8004 : g1->lowpc = g2->lowpc;
580 8004 : g1->highpc = g2->highpc;
581 8004 : result = 0;
582 : }
583 : else
584 8379 : result = g1->lowpc < g2->lowpc ? -1 : 1;
585 : }
586 :
587 458439 : return result;
588 : }
589 :
590 :
591 : static int
592 60372 : get_var_range (Dwarf_Die *die, Dwarf_Word *lowpc, Dwarf_Word *highpc)
593 : {
594 60372 : Dwarf_Attribute locattr_mem;
595 60372 : Dwarf_Attribute *locattr = dwarf_attr (die, DW_AT_location, &locattr_mem);
596 60372 : if (locattr == NULL)
597 : return 1;
598 :
599 3597 : Dwarf_Op *loc;
600 3597 : size_t nloc;
601 3597 : if (dwarf_getlocation (locattr, &loc, &nloc) != 0)
602 : return 1;
603 :
604 : /* Interpret the location expressions. */
605 : // XXX For now just the simple one:
606 3597 : if (nloc == 1 && loc[0].atom == DW_OP_addr)
607 : {
608 3537 : *lowpc = *highpc = loc[0].number;
609 3537 : return 0;
610 : }
611 :
612 : return 1;
613 : }
614 :
615 :
616 :
617 : static void *local_root;
618 :
619 :
620 : static void
621 33 : get_local_names (Dwarf *dbg)
622 : {
623 33 : Dwarf_Off offset = 0;
624 33 : Dwarf_Off old_offset;
625 33 : size_t hsize;
626 :
627 4890 : while (dwarf_nextcu (dbg, old_offset = offset, &offset, &hsize, NULL, NULL,
628 : NULL) == 0)
629 : {
630 4857 : Dwarf_Die cudie_mem;
631 4857 : Dwarf_Die *cudie = dwarf_offdie (dbg, old_offset + hsize, &cudie_mem);
632 :
633 : /* If we cannot get the CU DIE there is no need to go on with
634 : this CU. */
635 4857 : if (cudie == NULL)
636 0 : continue;
637 : /* This better be a CU DIE. */
638 4857 : if (dwarf_tag (cudie) != DW_TAG_compile_unit)
639 : continue;
640 :
641 : /* Get the line information. */
642 4857 : Dwarf_Files *files;
643 4857 : size_t nfiles;
644 4857 : if (dwarf_getsrcfiles (cudie, &files, &nfiles) != 0)
645 : continue;
646 :
647 4857 : Dwarf_Die die_mem;
648 4857 : Dwarf_Die *die = &die_mem;
649 4857 : if (dwarf_child (cudie, die) == 0)
650 : /* Iterate over all immediate children of the CU DIE. */
651 859494 : do
652 : {
653 859494 : int tag = dwarf_tag (die);
654 859494 : if (tag != DW_TAG_subprogram && tag != DW_TAG_variable)
655 844383 : continue;
656 :
657 : /* We are interested in five attributes: name, decl_file,
658 : decl_line, low_pc, and high_pc. */
659 101937 : Dwarf_Attribute attr_mem;
660 101937 : Dwarf_Attribute *attr = dwarf_attr (die, DW_AT_name, &attr_mem);
661 101937 : const char *name = dwarf_formstring (attr);
662 101937 : if (name == NULL)
663 : continue;
664 :
665 101067 : Dwarf_Word fileidx;
666 101067 : attr = dwarf_attr (die, DW_AT_decl_file, &attr_mem);
667 101067 : if (dwarf_formudata (attr, &fileidx) != 0 || fileidx >= nfiles)
668 : continue;
669 :
670 101067 : Dwarf_Word lineno;
671 101067 : attr = dwarf_attr (die, DW_AT_decl_line, &attr_mem);
672 101067 : if (dwarf_formudata (attr, &lineno) != 0 || lineno == 0)
673 : continue;
674 :
675 99870 : Dwarf_Addr lowpc;
676 99870 : Dwarf_Addr highpc;
677 99870 : if (tag == DW_TAG_subprogram)
678 : {
679 39498 : if (dwarf_lowpc (die, &lowpc) != 0
680 11574 : || dwarf_highpc (die, &highpc) != 0)
681 27924 : continue;
682 : }
683 : else
684 : {
685 60372 : if (get_var_range (die, &lowpc, &highpc) != 0)
686 : continue;
687 : }
688 :
689 : /* We have all the information. Create a record. */
690 15111 : struct local_name *newp
691 15111 : = (struct local_name *) xmalloc (sizeof (*newp));
692 15111 : newp->name = name;
693 15111 : newp->file = dwarf_filesrc (files, fileidx, NULL, NULL);
694 15111 : newp->lineno = lineno;
695 15111 : newp->lowpc = lowpc;
696 15111 : newp->highpc = highpc;
697 :
698 : /* Check whether a similar local_name is already in the
699 : cache. That should not happen. But if it does, we
700 : don't want to leak memory. */
701 15111 : struct local_name **tres = tsearch (newp, &local_root,
702 : local_compare);
703 15111 : if (tres == NULL)
704 0 : error (EXIT_FAILURE, errno,
705 0 : gettext ("cannot create search tree"));
706 15111 : else if (*tres != newp)
707 0 : free (newp);
708 : }
709 859494 : while (dwarf_siblingof (die, die) == 0);
710 : }
711 33 : }
712 :
713 : /* Do elf_strptr, but return a backup string and never NULL. */
714 : static const char *
715 103341 : sym_name (Elf *elf, GElf_Word strndx, GElf_Word st_name, char buf[], size_t n)
716 : {
717 103341 : const char *symstr = elf_strptr (elf, strndx, st_name);
718 103341 : if (symstr == NULL)
719 : {
720 0 : snprintf (buf, n, "[invalid st_name %#" PRIx32 "]", st_name);
721 0 : symstr = buf;
722 : }
723 103341 : return symstr;
724 : }
725 :
726 : /* Show symbols in SysV format. */
727 : static void
728 35 : show_symbols_sysv (Ebl *ebl, GElf_Word strndx, const char *fullname,
729 : GElf_SymX *syms, size_t nsyms, int longest_name,
730 : int longest_where)
731 : {
732 35 : size_t shnum;
733 35 : if (elf_getshdrnum (ebl->elf, &shnum) < 0)
734 0 : INTERNAL_ERROR (fullname);
735 :
736 35 : bool scnnames_malloced = shnum * sizeof (const char *) > 128 * 1024;
737 35 : const char **scnnames;
738 35 : if (scnnames_malloced)
739 0 : scnnames = (const char **) xmalloc (sizeof (const char *) * shnum);
740 : else
741 35 : scnnames = (const char **) alloca (sizeof (const char *) * shnum);
742 : /* Get the section header string table index. */
743 35 : size_t shstrndx;
744 35 : if (elf_getshdrstrndx (ebl->elf, &shstrndx) < 0)
745 0 : error (EXIT_FAILURE, 0,
746 0 : gettext ("cannot get section header string table index"));
747 :
748 : /* Cache the section names. */
749 : Elf_Scn *scn = NULL;
750 : size_t cnt = 1;
751 1354 : while ((scn = elf_nextscn (ebl->elf, scn)) != NULL)
752 : {
753 1319 : GElf_Shdr shdr_mem;
754 1319 : GElf_Shdr *shdr;
755 :
756 1319 : assert (elf_ndxscn (scn) == cnt);
757 1319 : cnt++;
758 :
759 1319 : char *name = NULL;
760 1319 : shdr = gelf_getshdr (scn, &shdr_mem);
761 1319 : if (shdr != NULL)
762 1319 : name = elf_strptr (ebl->elf, shstrndx, shdr->sh_name);
763 1319 : if (unlikely (name == NULL))
764 0 : name = "[invalid section name]";
765 1319 : scnnames[elf_ndxscn (scn)] = name;
766 : }
767 :
768 35 : int digits = length_map[gelf_getclass (ebl->elf) - 1][radix];
769 :
770 : /* We always print this prolog. */
771 35 : printf (gettext ("\n\nSymbols from %s:\n\n"), fullname);
772 :
773 : /* The header line. */
774 35 : printf (gettext ("%*s%-*s %-*s Class Type %-*s %*s Section\n\n"),
775 35 : print_file_name ? (int) strlen (fullname) + 1: 0, "",
776 35 : longest_name, sgettext ("sysv|Name"),
777 : /* TRANS: the "sysv|" parts makes the string unique. */
778 35 : digits, sgettext ("sysv|Value"),
779 : /* TRANS: the "sysv|" parts makes the string unique. */
780 35 : digits, sgettext ("sysv|Size"),
781 : /* TRANS: the "sysv|" parts makes the string unique. */
782 35 : longest_where, sgettext ("sysv|Line"));
783 :
784 : #ifdef USE_DEMANGLE
785 35 : size_t demangle_buffer_len = 0;
786 35 : char *demangle_buffer = NULL;
787 : #endif
788 :
789 : /* Iterate over all symbols. */
790 34674 : for (cnt = 0; cnt < nsyms; ++cnt)
791 : {
792 : /* In this format SECTION entries are not printed. */
793 34639 : if (GELF_ST_TYPE (syms[cnt].sym.st_info) == STT_SECTION)
794 3073 : continue;
795 :
796 34057 : char symstrbuf[50];
797 34057 : const char *symstr = sym_name (ebl->elf, strndx, syms[cnt].sym.st_name,
798 : symstrbuf, sizeof symstrbuf);
799 :
800 : /* Printing entries with a zero-length name makes the output
801 : not very well parseable. Since these entries don't carry
802 : much information we leave them out. */
803 34057 : if (symstr[0] == '\0')
804 : continue;
805 :
806 : /* We do not print the entries for files. */
807 34028 : if (GELF_ST_TYPE (syms[cnt].sym.st_info) == STT_FILE)
808 : continue;
809 :
810 : #ifdef USE_DEMANGLE
811 : /* Demangle if necessary. Require GNU v3 ABI by the "_Z" prefix. */
812 31566 : if (demangle && symstr[0] == '_' && symstr[1] == 'Z')
813 : {
814 0 : int status = -1;
815 0 : char *dmsymstr = __cxa_demangle (symstr, demangle_buffer,
816 : &demangle_buffer_len, &status);
817 :
818 0 : if (status == 0)
819 0 : symstr = dmsymstr;
820 : }
821 : #endif
822 :
823 31566 : char symbindbuf[50];
824 31566 : char symtypebuf[50];
825 31566 : char secnamebuf[1024];
826 31566 : char addressbuf[(64 + 2) / 3 + 1];
827 31566 : char sizebuf[(64 + 2) / 3 + 1];
828 :
829 : /* If we have to precede the line with the file name. */
830 31566 : if (print_file_name)
831 : {
832 0 : fputs_unlocked (fullname, stdout);
833 0 : putchar_unlocked (':');
834 : }
835 :
836 : /* Covert the address. */
837 31566 : if (syms[cnt].sym.st_shndx == SHN_UNDEF)
838 : {
839 2201 : sprintf (addressbuf, "%*c", digits, ' ');
840 2201 : sprintf (sizebuf, "%*c", digits, ' ');
841 : }
842 : else
843 : {
844 29365 : snprintf (addressbuf, sizeof (addressbuf),
845 29365 : (radix == radix_hex ? "%0*" PRIx64
846 : : (radix == radix_decimal ? "%0*" PRId64
847 : : "%0*" PRIo64)),
848 : digits, syms[cnt].sym.st_value);
849 29365 : snprintf (sizebuf, sizeof (sizebuf),
850 29365 : (radix == radix_hex ? "%0*" PRIx64
851 : : (radix == radix_decimal ? "%0*" PRId64
852 : : "%0*" PRIo64)),
853 : digits, syms[cnt].sym.st_size);
854 : }
855 :
856 : /* Print the actual string. */
857 31566 : const char *bind;
858 94698 : bind = ebl_symbol_binding_name (ebl,
859 31566 : GELF_ST_BIND (syms[cnt].sym.st_info),
860 : symbindbuf, sizeof (symbindbuf));
861 31566 : if (bind != NULL && strncmp (bind, "GNU_", strlen ("GNU_")) == 0)
862 2 : bind += strlen ("GNU_");
863 31566 : printf ("%-*s|%s|%-6s|%-8s|%s|%*s|%s\n",
864 : longest_name, symstr, addressbuf, bind,
865 31566 : ebl_symbol_type_name (ebl, GELF_ST_TYPE (syms[cnt].sym.st_info),
866 : symtypebuf, sizeof (symtypebuf)),
867 : sizebuf, longest_where, syms[cnt].where,
868 31566 : ebl_section_name (ebl, syms[cnt].sym.st_shndx, syms[cnt].xndx,
869 : secnamebuf, sizeof (secnamebuf), scnnames,
870 : shnum));
871 : }
872 :
873 : #ifdef USE_DEMANGLE
874 35 : free (demangle_buffer);
875 : #endif
876 :
877 35 : if (scnnames_malloced)
878 0 : free (scnnames);
879 35 : }
880 :
881 :
882 : static char
883 0 : class_type_char (Elf *elf, const GElf_Ehdr *ehdr, GElf_Sym *sym)
884 : {
885 0 : int local_p = GELF_ST_BIND (sym->st_info) == STB_LOCAL;
886 :
887 : /* XXX Add support for architecture specific types and classes. */
888 0 : if (sym->st_shndx == SHN_ABS)
889 0 : return local_p ? 'a' : 'A';
890 :
891 0 : if (sym->st_shndx == SHN_UNDEF)
892 : /* Undefined symbols must be global. */
893 0 : return 'U';
894 :
895 0 : char result = "NDTSFBD "[GELF_ST_TYPE (sym->st_info)];
896 :
897 0 : if (result == 'D')
898 : {
899 : /* Special handling: unique data symbols. */
900 0 : if (ehdr->e_ident[EI_OSABI] == ELFOSABI_LINUX
901 0 : && GELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE)
902 : result = 'u';
903 0 : else if (GELF_ST_BIND (sym->st_info) == STB_WEAK)
904 : result = 'V';
905 0 : else if (sym->st_shndx == SHN_COMMON)
906 : result = 'C';
907 : else
908 : {
909 0 : GElf_Shdr shdr_mem;
910 0 : GElf_Shdr *shdr = gelf_getshdr (elf_getscn (elf, sym->st_shndx),
911 : &shdr_mem);
912 0 : if (shdr != NULL)
913 : {
914 0 : if ((shdr->sh_flags & SHF_WRITE) == 0)
915 : result = 'R';
916 0 : else if (shdr->sh_type == SHT_NOBITS)
917 0 : result = 'B';
918 : }
919 : }
920 : }
921 0 : else if (result == 'T')
922 : {
923 0 : if (GELF_ST_BIND (sym->st_info) == STB_WEAK)
924 0 : result = 'W';
925 : }
926 :
927 0 : return local_p ? tolower (result) : result;
928 : }
929 :
930 :
931 : static void
932 35 : show_symbols_bsd (Elf *elf, const GElf_Ehdr *ehdr, GElf_Word strndx,
933 : const char *prefix, const char *fname, const char *fullname,
934 : GElf_SymX *syms, size_t nsyms)
935 : {
936 35 : int digits = length_map[gelf_getclass (elf) - 1][radix];
937 :
938 35 : if (prefix != NULL && ! print_file_name)
939 0 : printf ("\n%s:\n", fname);
940 :
941 : #ifdef USE_DEMANGLE
942 35 : size_t demangle_buffer_len = 0;
943 35 : char *demangle_buffer = NULL;
944 : #endif
945 :
946 : /* Iterate over all symbols. */
947 34674 : for (size_t cnt = 0; cnt < nsyms; ++cnt)
948 : {
949 34639 : char symstrbuf[50];
950 34639 : const char *symstr = sym_name (elf, strndx, syms[cnt].sym.st_name,
951 : symstrbuf, sizeof symstrbuf);
952 :
953 : /* Printing entries with a zero-length name makes the output
954 : not very well parseable. Since these entries don't carry
955 : much information we leave them out. */
956 34639 : if (symstr[0] == '\0')
957 3073 : continue;
958 :
959 : /* We do not print the entries for files. */
960 34028 : if (GELF_ST_TYPE (syms[cnt].sym.st_info) == STT_FILE)
961 : continue;
962 :
963 : #ifdef USE_DEMANGLE
964 : /* Demangle if necessary. Require GNU v3 ABI by the "_Z" prefix. */
965 31566 : if (demangle && symstr[0] == '_' && symstr[1] == 'Z')
966 : {
967 0 : int status = -1;
968 0 : char *dmsymstr = __cxa_demangle (symstr, demangle_buffer,
969 : &demangle_buffer_len, &status);
970 :
971 0 : if (status == 0)
972 0 : symstr = dmsymstr;
973 : }
974 : #endif
975 :
976 : /* If we have to precede the line with the file name. */
977 31566 : if (print_file_name)
978 : {
979 0 : fputs_unlocked (fullname, stdout);
980 0 : putchar_unlocked (':');
981 : }
982 :
983 31566 : bool is_tls = GELF_ST_TYPE (syms[cnt].sym.st_info) == STT_TLS;
984 31566 : bool is_weak = GELF_ST_BIND (syms[cnt].sym.st_info) == STB_WEAK;
985 63132 : const char *marker = (mark_special
986 31566 : ? (is_tls ? "@" : (is_weak ? "*" : " ")) : "");
987 :
988 31566 : if (syms[cnt].sym.st_shndx == SHN_UNDEF)
989 : {
990 2201 : const char *color = "";
991 2201 : if (color_mode)
992 : {
993 0 : if (is_tls)
994 0 : color = color_undef_tls;
995 0 : else if (is_weak)
996 0 : color = color_undef_weak;
997 : else
998 0 : color = color_undef;
999 : }
1000 :
1001 2201 : printf ("%*s %sU%s %s", digits, "", color, marker, symstr);
1002 : }
1003 : else
1004 : {
1005 29365 : const char *color = "";
1006 29365 : if (color_mode)
1007 : {
1008 0 : if (is_tls)
1009 0 : color = color_tls;
1010 0 : else if (is_weak)
1011 0 : color = color_weak;
1012 : else
1013 0 : color = color_symbol;
1014 : }
1015 29365 : if (print_size && syms[cnt].sym.st_size != 0)
1016 : {
1017 : #define HEXFMT "%6$s%2$0*1$" PRIx64 "%8$s %10$0*9$" PRIx64 " %7$s%3$c%4$s %5$s"
1018 : #define DECFMT "%6$s%2$*1$" PRId64 "%8$s %10$*9$" PRId64 " %7$s%3$c%4$s %5$s"
1019 : #define OCTFMT "%6$s%2$0*1$" PRIo64 "%8$s %10$0*9$" PRIo64 " %7$s%3$c%4$s %5$s"
1020 0 : printf ((radix == radix_hex ? HEXFMT
1021 0 : : (radix == radix_decimal ? DECFMT : OCTFMT)),
1022 : digits, syms[cnt].sym.st_value,
1023 0 : class_type_char (elf, ehdr, &syms[cnt].sym), marker,
1024 : symstr,
1025 : color_mode ? color_address : "",
1026 : color,
1027 : color_mode ? color_off : "",
1028 : digits, (uint64_t) syms[cnt].sym.st_size);
1029 : #undef HEXFMT
1030 : #undef DECFMT
1031 : #undef OCTFMT
1032 : }
1033 : else
1034 : {
1035 : #define HEXFMT "%6$s%2$0*1$" PRIx64 "%8$s %7$s%3$c%4$s %5$s"
1036 : #define DECFMT "%6$s%2$*1$" PRId64 "%8$s %7$s%3$c%4$s %5$s"
1037 : #define OCTFMT "%6$s%2$0*1$" PRIo64 "%8$s %7$s%3$c%4$s %5$s"
1038 88095 : printf ((radix == radix_hex ? HEXFMT
1039 0 : : (radix == radix_decimal ? DECFMT : OCTFMT)),
1040 : digits, syms[cnt].sym.st_value,
1041 29365 : class_type_char (elf, ehdr, &syms[cnt].sym), marker,
1042 : symstr,
1043 : color_mode ? color_address : "",
1044 : color,
1045 : color_mode ? color_off : "");
1046 : #undef HEXFMT
1047 : #undef DECFMT
1048 : #undef OCTFMT
1049 : }
1050 : }
1051 :
1052 31566 : if (color_mode)
1053 0 : fputs_unlocked (color_off, stdout);
1054 31566 : putchar_unlocked ('\n');
1055 : }
1056 :
1057 : #ifdef USE_DEMANGLE
1058 35 : free (demangle_buffer);
1059 : #endif
1060 35 : }
1061 :
1062 :
1063 : static void
1064 38 : show_symbols_posix (Elf *elf, const GElf_Ehdr *ehdr, GElf_Word strndx,
1065 : const char *prefix, const char *fullname, GElf_SymX *syms,
1066 : size_t nsyms)
1067 : {
1068 38 : if (prefix != NULL && ! print_file_name)
1069 3 : printf ("%s:\n", fullname);
1070 :
1071 38 : int digits = length_map[gelf_getclass (elf) - 1][radix];
1072 :
1073 : #ifdef USE_DEMANGLE
1074 38 : size_t demangle_buffer_len = 0;
1075 38 : char *demangle_buffer = NULL;
1076 : #endif
1077 :
1078 : /* Iterate over all symbols. */
1079 34683 : for (size_t cnt = 0; cnt < nsyms; ++cnt)
1080 : {
1081 34645 : char symstrbuf[50];
1082 34645 : const char *symstr = sym_name (elf, strndx, syms[cnt].sym.st_name,
1083 : symstrbuf, sizeof symstrbuf);
1084 :
1085 : /* Printing entries with a zero-length name makes the output
1086 : not very well parseable. Since these entries don't carry
1087 : much information we leave them out. */
1088 34645 : if (symstr[0] == '\0')
1089 3073 : continue;
1090 :
1091 : /* We do not print the entries for files. */
1092 34034 : if (GELF_ST_TYPE (syms[cnt].sym.st_info) == STT_FILE)
1093 : continue;
1094 :
1095 : #ifdef USE_DEMANGLE
1096 : /* Demangle if necessary. Require GNU v3 ABI by the "_Z" prefix. */
1097 31572 : if (demangle && symstr[0] == '_' && symstr[1] == 'Z')
1098 : {
1099 0 : int status = -1;
1100 0 : char *dmsymstr = __cxa_demangle (symstr, demangle_buffer,
1101 : &demangle_buffer_len, &status);
1102 :
1103 0 : if (status == 0)
1104 0 : symstr = dmsymstr;
1105 : }
1106 : #endif
1107 :
1108 : /* If we have to precede the line with the file name. */
1109 31572 : if (print_file_name)
1110 : {
1111 0 : fputs_unlocked (fullname, stdout);
1112 0 : putchar_unlocked (':');
1113 0 : putchar_unlocked (' ');
1114 : }
1115 :
1116 31572 : printf ("%s %c%s", symstr,
1117 31572 : class_type_char (elf, ehdr, &syms[cnt].sym),
1118 : mark_special
1119 31572 : ? (GELF_ST_TYPE (syms[cnt].sym.st_info) == STT_TLS
1120 : ? "@"
1121 0 : : (GELF_ST_BIND (syms[cnt].sym.st_info) == STB_WEAK
1122 0 : ? "*" : " "))
1123 : : "");
1124 31572 : if (syms[cnt].sym.st_shndx != SHN_UNDEF)
1125 29371 : printf ((radix == radix_hex
1126 : ? " %0*" PRIx64 " %0*" PRIx64
1127 0 : : (radix == radix_decimal
1128 : ? " %*" PRId64 " %*" PRId64
1129 : : " %0*" PRIo64 " %0*" PRIo64)),
1130 : digits, syms[cnt].sym.st_value,
1131 : digits, syms[cnt].sym.st_size);
1132 31572 : putchar ('\n');
1133 : }
1134 :
1135 : #ifdef USE_DEMANGLE
1136 38 : free (demangle_buffer);
1137 : #endif
1138 38 : }
1139 :
1140 :
1141 : /* Maximum size of memory we allocate on the stack. */
1142 : #define MAX_STACK_ALLOC 65536
1143 :
1144 : static int
1145 322428 : sort_by_address (const void *p1, const void *p2)
1146 : {
1147 322428 : GElf_SymX *s1 = (GElf_SymX *) p1;
1148 322428 : GElf_SymX *s2 = (GElf_SymX *) p2;
1149 :
1150 644856 : int result = (s1->sym.st_value < s2->sym.st_value
1151 322428 : ? -1 : (s1->sym.st_value == s2->sym.st_value ? 0 : 1));
1152 :
1153 322428 : return reverse_sort ? -result : result;
1154 : }
1155 :
1156 : static Elf *sort_by_name_elf;
1157 : static size_t sort_by_name_ndx;
1158 :
1159 : static int
1160 339198 : sort_by_name (const void *p1, const void *p2)
1161 : {
1162 339198 : GElf_SymX *s1 = (GElf_SymX *) p1;
1163 339198 : GElf_SymX *s2 = (GElf_SymX *) p2;
1164 :
1165 1017594 : const char *n1 = elf_strptr (sort_by_name_elf, sort_by_name_ndx,
1166 339198 : s1->sym.st_name) ?: "";
1167 1017594 : const char *n2 = elf_strptr (sort_by_name_elf, sort_by_name_ndx,
1168 339198 : s2->sym.st_name) ?: "";
1169 :
1170 339198 : int result = strcmp (n1, n2);
1171 :
1172 339198 : return reverse_sort ? -result : result;
1173 : }
1174 :
1175 : /* Stub libdwfl callback, only the ELF handle already open is ever
1176 : used. Only used for finding the alternate debug file if the Dwarf
1177 : comes from the main file. We are not interested in separate
1178 : debuginfo. */
1179 : static int
1180 2 : find_no_debuginfo (Dwfl_Module *mod,
1181 : void **userdata,
1182 : const char *modname,
1183 : Dwarf_Addr base,
1184 : const char *file_name,
1185 : const char *debuglink_file,
1186 : GElf_Word debuglink_crc,
1187 : char **debuginfo_file_name)
1188 : {
1189 2 : Dwarf_Addr dwbias;
1190 2 : dwfl_module_info (mod, NULL, NULL, NULL, &dwbias, NULL, NULL, NULL);
1191 :
1192 : /* We are only interested if the Dwarf has been setup on the main
1193 : elf file but is only missing the alternate debug link. If dwbias
1194 : hasn't even been setup, this is searching for separate debuginfo
1195 : for the main elf. We don't care in that case. */
1196 2 : if (dwbias == (Dwarf_Addr) -1)
1197 : return -1;
1198 :
1199 0 : return dwfl_standard_find_debuginfo (mod, userdata, modname, base,
1200 : file_name, debuglink_file,
1201 : debuglink_crc, debuginfo_file_name);
1202 : }
1203 :
1204 : /* Get the Dwarf for the module/file we want. */
1205 : struct getdbg
1206 : {
1207 : const char *name;
1208 : Dwarf **dbg;
1209 : };
1210 :
1211 : static int
1212 11 : getdbg_dwflmod (Dwfl_Module *dwflmod,
1213 : void **userdata __attribute__ ((unused)),
1214 : const char *name,
1215 : Dwarf_Addr base __attribute__ ((unused)),
1216 : void *arg)
1217 : {
1218 11 : struct getdbg *get = (struct getdbg *) arg;
1219 11 : if (get != NULL && get->name != NULL && strcmp (get->name, name) == 0)
1220 : {
1221 11 : Dwarf_Addr bias;
1222 11 : *get->dbg = dwfl_module_getdwarf (dwflmod, &bias);
1223 11 : return DWARF_CB_ABORT;
1224 : }
1225 :
1226 : return DWARF_CB_OK;
1227 : }
1228 :
1229 : static void
1230 108 : show_symbols (int fd, Ebl *ebl, GElf_Ehdr *ehdr,
1231 : Elf_Scn *scn, Elf_Scn *xndxscn,
1232 : GElf_Shdr *shdr, const char *prefix, const char *fname,
1233 : const char *fullname)
1234 : {
1235 : /* Get the section header string table index. */
1236 108 : size_t shstrndx;
1237 108 : if (elf_getshdrstrndx (ebl->elf, &shstrndx) < 0)
1238 0 : error (EXIT_FAILURE, 0,
1239 0 : gettext ("cannot get section header string table index"));
1240 :
1241 : /* The section is that large. */
1242 108 : size_t size = shdr->sh_size;
1243 : /* One entry is this large. */
1244 108 : size_t entsize = shdr->sh_entsize;
1245 :
1246 : /* Consistency checks. */
1247 108 : if (entsize == 0
1248 108 : || entsize != gelf_fsize (ebl->elf, ELF_T_SYM, 1, EV_CURRENT))
1249 0 : error (0, 0,
1250 0 : gettext ("%s: entry size in section %zd `%s' is not what we expect"),
1251 : fullname, elf_ndxscn (scn),
1252 0 : elf_strptr (ebl->elf, shstrndx, shdr->sh_name));
1253 108 : else if (size % entsize != 0)
1254 0 : error (0, 0,
1255 0 : gettext ("%s: size of section %zd `%s' is not multiple of entry size"),
1256 : fullname, elf_ndxscn (scn),
1257 0 : elf_strptr (ebl->elf, shstrndx, shdr->sh_name));
1258 :
1259 : /* Compute number of entries. Handle buggy entsize values. */
1260 108 : size_t nentries = size / (entsize ?: 1);
1261 :
1262 :
1263 : #define obstack_chunk_alloc xmalloc
1264 : #define obstack_chunk_free free
1265 108 : struct obstack whereob;
1266 108 : obstack_init (&whereob);
1267 :
1268 : /* Get a DWARF debugging descriptor. It's no problem if this isn't
1269 : possible. We just won't print any line number information. */
1270 108 : Dwarf *dbg = NULL;
1271 108 : Dwfl *dwfl = NULL;
1272 108 : if (format == format_sysv)
1273 : {
1274 35 : if (ehdr->e_type != ET_REL)
1275 24 : dbg = dwarf_begin_elf (ebl->elf, DWARF_C_READ, NULL);
1276 : else
1277 : {
1278 : /* Abuse libdwfl to do the relocations for us. This is just
1279 : for the ET_REL file containing Dwarf, so no need for
1280 : fancy lookups. */
1281 :
1282 : /* Duplicate an fd for dwfl_report_offline to swallow. */
1283 11 : int dwfl_fd = dup (fd);
1284 11 : if (likely (dwfl_fd >= 0))
1285 : {
1286 11 : static const Dwfl_Callbacks callbacks =
1287 : {
1288 : .section_address = dwfl_offline_section_address,
1289 : .find_debuginfo = find_no_debuginfo
1290 : };
1291 11 : dwfl = dwfl_begin (&callbacks);
1292 11 : if (likely (dwfl != NULL))
1293 : {
1294 : /* Let 0 be the logical address of the file (or
1295 : first in archive). */
1296 11 : dwfl->offline_next_address = 0;
1297 11 : if (dwfl_report_offline (dwfl, fname, fname, dwfl_fd)
1298 : == NULL)
1299 : {
1300 : /* Consumed on success, not on failure. */
1301 0 : close (dwfl_fd);
1302 : }
1303 : else
1304 : {
1305 11 : dwfl_report_end (dwfl, NULL, NULL);
1306 :
1307 11 : struct getdbg get = { .name = fname, .dbg = &dbg };
1308 11 : dwfl_getmodules (dwfl, &getdbg_dwflmod, &get, 0);
1309 : }
1310 : }
1311 : }
1312 : }
1313 35 : if (dbg != NULL)
1314 : {
1315 33 : (void) dwarf_getpubnames (dbg, get_global, NULL, 0);
1316 :
1317 33 : get_local_names (dbg);
1318 : }
1319 : }
1320 :
1321 : /* Get the data of the section. */
1322 108 : Elf_Data *data = elf_getdata (scn, NULL);
1323 108 : Elf_Data *xndxdata = elf_getdata (xndxscn, NULL);
1324 108 : if (data == NULL || (xndxscn != NULL && xndxdata == NULL))
1325 0 : INTERNAL_ERROR (fullname);
1326 :
1327 : /* Allocate the memory.
1328 :
1329 : XXX We can use a dirty trick here. Since GElf_Sym == Elf64_Sym we
1330 : can use the data memory instead of copying again if what we read
1331 : is a 64 bit file. */
1332 108 : if (nentries > SIZE_MAX / sizeof (GElf_SymX))
1333 0 : error (EXIT_FAILURE, 0,
1334 0 : gettext ("%s: entries (%zd) in section %zd `%s' is too large"),
1335 : fullname, nentries, elf_ndxscn (scn),
1336 0 : elf_strptr (ebl->elf, shstrndx, shdr->sh_name));
1337 108 : GElf_SymX *sym_mem;
1338 108 : if (nentries * sizeof (GElf_SymX) < MAX_STACK_ALLOC)
1339 81 : sym_mem = (GElf_SymX *) alloca (nentries * sizeof (GElf_SymX));
1340 : else
1341 27 : sym_mem = (GElf_SymX *) xmalloc (nentries * sizeof (GElf_SymX));
1342 :
1343 : /* Iterate over all symbols. */
1344 : #ifdef USE_DEMANGLE
1345 108 : size_t demangle_buffer_len = 0;
1346 108 : char *demangle_buffer = NULL;
1347 : #endif
1348 108 : int longest_name = 4;
1349 108 : int longest_where = 4;
1350 108 : size_t nentries_used = 0;
1351 144924 : for (size_t cnt = 0; cnt < nentries; ++cnt)
1352 : {
1353 434448 : GElf_Sym *sym = gelf_getsymshndx (data, xndxdata, cnt,
1354 : &sym_mem[nentries_used].sym,
1355 144816 : &sym_mem[nentries_used].xndx);
1356 144816 : if (sym == NULL)
1357 0 : INTERNAL_ERROR (fullname);
1358 :
1359 : /* Filter out administrative symbols without a name and those
1360 : deselected by the user with command line options. */
1361 144816 : if ((hide_undefined && sym->st_shndx == SHN_UNDEF)
1362 142269 : || (hide_defined && sym->st_shndx != SHN_UNDEF)
1363 142269 : || (hide_local && GELF_ST_BIND (sym->st_info) == STB_LOCAL))
1364 : continue;
1365 :
1366 103923 : sym_mem[nentries_used].where = "";
1367 103923 : if (format == format_sysv)
1368 : {
1369 103917 : const char *symstr = elf_strptr (ebl->elf, shdr->sh_link,
1370 34639 : sym->st_name);
1371 34639 : if (symstr == NULL)
1372 : continue;
1373 :
1374 : #ifdef USE_DEMANGLE
1375 : /* Demangle if necessary. Require GNU v3 ABI by the "_Z" prefix. */
1376 34639 : if (demangle && symstr[0] == '_' && symstr[1] == 'Z')
1377 : {
1378 0 : int status = -1;
1379 0 : char *dmsymstr = __cxa_demangle (symstr, demangle_buffer,
1380 : &demangle_buffer_len, &status);
1381 :
1382 0 : if (status == 0)
1383 0 : symstr = dmsymstr;
1384 : }
1385 : #endif
1386 :
1387 34639 : longest_name = MAX ((size_t) longest_name, strlen (symstr));
1388 :
1389 34639 : if (sym->st_shndx != SHN_UNDEF
1390 32421 : && GELF_ST_BIND (sym->st_info) != STB_LOCAL
1391 6865 : && global_root != NULL)
1392 : {
1393 0 : Dwarf_Global fake = { .name = symstr };
1394 0 : Dwarf_Global **found = tfind (&fake, &global_root,
1395 : global_compare);
1396 0 : if (found != NULL)
1397 : {
1398 0 : Dwarf_Die die_mem;
1399 0 : Dwarf_Die *die = dwarf_offdie (dbg, (*found)->die_offset,
1400 : &die_mem);
1401 :
1402 0 : Dwarf_Die cudie_mem;
1403 0 : Dwarf_Die *cudie = NULL;
1404 :
1405 0 : Dwarf_Addr lowpc;
1406 0 : Dwarf_Addr highpc;
1407 0 : if (die != NULL
1408 0 : && dwarf_lowpc (die, &lowpc) == 0
1409 0 : && lowpc <= sym->st_value
1410 0 : && dwarf_highpc (die, &highpc) == 0
1411 0 : && highpc > sym->st_value)
1412 0 : cudie = dwarf_offdie (dbg, (*found)->cu_offset,
1413 : &cudie_mem);
1414 0 : if (cudie != NULL)
1415 : {
1416 0 : Dwarf_Line *line = dwarf_getsrc_die (cudie,
1417 : sym->st_value);
1418 0 : if (line != NULL)
1419 : {
1420 : /* We found the line. */
1421 0 : int lineno;
1422 0 : (void) dwarf_lineno (line, &lineno);
1423 0 : const char *file = dwarf_linesrc (line, NULL, NULL);
1424 0 : file = (file != NULL) ? basename (file) : "???";
1425 0 : int n;
1426 0 : n = obstack_printf (&whereob, "%s:%d%c", file,
1427 : lineno, '\0');
1428 0 : sym_mem[nentries_used].where
1429 0 : = obstack_finish (&whereob);
1430 :
1431 : /* The return value of obstack_print included the
1432 : NUL byte, so subtract one. */
1433 0 : if (--n > (int) longest_where)
1434 0 : longest_where = (size_t) n;
1435 : }
1436 : }
1437 : }
1438 : }
1439 :
1440 : /* Try to find the symbol among the local symbols. */
1441 34639 : if (sym_mem[nentries_used].where[0] == '\0')
1442 : {
1443 69278 : struct local_name fake =
1444 : {
1445 : .name = symstr,
1446 34639 : .lowpc = sym->st_value,
1447 : .highpc = sym->st_value,
1448 : };
1449 34639 : struct local_name **found = tfind (&fake, &local_root,
1450 : local_compare);
1451 34639 : if (found != NULL)
1452 : {
1453 : /* We found the line. */
1454 9651 : int n = obstack_printf (&whereob, "%s:%" PRIu64 "%c",
1455 : basename ((*found)->file),
1456 9651 : (*found)->lineno,
1457 : '\0');
1458 9651 : sym_mem[nentries_used].where = obstack_finish (&whereob);
1459 :
1460 : /* The return value of obstack_print included the
1461 : NUL byte, so subtract one. */
1462 9651 : if (--n > (int) longest_where)
1463 138 : longest_where = (size_t) n;
1464 : }
1465 : }
1466 : }
1467 :
1468 : /* We use this entry. */
1469 103923 : ++nentries_used;
1470 : }
1471 : #ifdef USE_DEMANGLE
1472 108 : free (demangle_buffer);
1473 : #endif
1474 : /* Now we know the exact number. */
1475 108 : size_t nentries_orig = nentries;
1476 108 : nentries = nentries_used;
1477 :
1478 : /* Sort the entries according to the users wishes. */
1479 108 : if (sort == sort_name)
1480 : {
1481 42 : sort_by_name_elf = ebl->elf;
1482 42 : sort_by_name_ndx = shdr->sh_link;
1483 42 : qsort (sym_mem, nentries, sizeof (GElf_SymX), sort_by_name);
1484 : }
1485 66 : else if (sort == sort_numeric)
1486 33 : qsort (sym_mem, nentries, sizeof (GElf_SymX), sort_by_address);
1487 :
1488 : /* Finally print according to the users selection. */
1489 108 : switch (format)
1490 : {
1491 35 : case format_sysv:
1492 35 : show_symbols_sysv (ebl, shdr->sh_link, fullname, sym_mem, nentries,
1493 : longest_name, longest_where);
1494 35 : break;
1495 :
1496 35 : case format_bsd:
1497 35 : show_symbols_bsd (ebl->elf, ehdr, shdr->sh_link, prefix, fname, fullname,
1498 : sym_mem, nentries);
1499 35 : break;
1500 :
1501 38 : case format_posix:
1502 : default:
1503 38 : assert (format == format_posix);
1504 38 : show_symbols_posix (ebl->elf, ehdr, shdr->sh_link, prefix, fullname,
1505 : sym_mem, nentries);
1506 38 : break;
1507 : }
1508 :
1509 : /* Free all memory. */
1510 108 : if (nentries_orig * sizeof (sym_mem[0]) >= MAX_STACK_ALLOC)
1511 27 : free (sym_mem);
1512 :
1513 108 : obstack_free (&whereob, NULL);
1514 :
1515 108 : if (dbg != NULL)
1516 : {
1517 33 : tdestroy (global_root, free);
1518 33 : global_root = NULL;
1519 :
1520 33 : tdestroy (local_root, free);
1521 33 : local_root = NULL;
1522 :
1523 33 : if (dwfl == NULL)
1524 24 : (void) dwarf_end (dbg);
1525 : }
1526 108 : if (dwfl != NULL)
1527 11 : dwfl_end (dwfl);
1528 108 : }
1529 :
1530 :
1531 : static int
1532 108 : handle_elf (int fd, Elf *elf, const char *prefix, const char *fname,
1533 : const char *suffix)
1534 108 : {
1535 108 : size_t prefix_len = prefix == NULL ? 0 : strlen (prefix);
1536 108 : size_t suffix_len = suffix == NULL ? 0 : strlen (suffix);
1537 108 : size_t fname_len = strlen (fname) + 1;
1538 108 : char fullname[prefix_len + 1 + fname_len + suffix_len];
1539 108 : char *cp = fullname;
1540 108 : Elf_Scn *scn = NULL;
1541 108 : int any = 0;
1542 108 : int result = 0;
1543 108 : GElf_Ehdr ehdr_mem;
1544 108 : GElf_Ehdr *ehdr;
1545 108 : Ebl *ebl;
1546 :
1547 : /* Create the full name of the file. */
1548 108 : if (prefix != NULL)
1549 6 : cp = mempcpy (cp, prefix, prefix_len);
1550 108 : cp = mempcpy (cp, fname, fname_len);
1551 108 : if (suffix != NULL)
1552 3 : memcpy (cp - 1, suffix, suffix_len + 1);
1553 :
1554 : /* Get the backend for this object file type. */
1555 108 : ebl = ebl_openbackend (elf);
1556 108 : if (ebl == NULL)
1557 0 : INTERNAL_ERROR (fullname);
1558 :
1559 : /* We need the ELF header in a few places. */
1560 108 : ehdr = gelf_getehdr (elf, &ehdr_mem);
1561 108 : if (ehdr == NULL)
1562 0 : INTERNAL_ERROR (fullname);
1563 :
1564 : /* If we are asked to print the dynamic symbol table and this is
1565 : executable or dynamic executable, fail. */
1566 108 : if (symsec_type == SHT_DYNSYM
1567 18 : && ehdr->e_type != ET_EXEC && ehdr->e_type != ET_DYN)
1568 : {
1569 : /* XXX Add machine specific object file types. */
1570 0 : error (0, 0, gettext ("%s%s%s%s: Invalid operation"),
1571 : prefix ?: "", prefix ? "(" : "", fname, prefix ? ")" : "");
1572 0 : result = 1;
1573 0 : goto out;
1574 : }
1575 :
1576 : /* Find the symbol table.
1577 :
1578 : XXX Can there be more than one? Do we print all? Currently we do. */
1579 4095 : while ((scn = elf_nextscn (elf, scn)) != NULL)
1580 : {
1581 3987 : GElf_Shdr shdr_mem;
1582 3987 : GElf_Shdr *shdr = gelf_getshdr (scn, &shdr_mem);
1583 :
1584 3987 : if (shdr == NULL)
1585 0 : INTERNAL_ERROR (fullname);
1586 :
1587 3987 : if (shdr->sh_type == symsec_type)
1588 : {
1589 108 : Elf_Scn *xndxscn = NULL;
1590 :
1591 : /* We have a symbol table. First make sure we remember this. */
1592 108 : any = 1;
1593 :
1594 : /* Look for an extended section index table for this section. */
1595 108 : if (symsec_type == SHT_SYMTAB)
1596 : {
1597 90 : size_t scnndx = elf_ndxscn (scn);
1598 :
1599 3393 : while ((xndxscn = elf_nextscn (elf, xndxscn)) != NULL)
1600 : {
1601 3303 : GElf_Shdr xndxshdr_mem;
1602 3303 : GElf_Shdr *xndxshdr = gelf_getshdr (xndxscn, &xndxshdr_mem);
1603 :
1604 3303 : if (xndxshdr == NULL)
1605 0 : INTERNAL_ERROR (fullname);
1606 :
1607 3303 : if (xndxshdr->sh_type == SHT_SYMTAB_SHNDX
1608 0 : && xndxshdr->sh_link == scnndx)
1609 : break;
1610 : }
1611 : }
1612 :
1613 108 : show_symbols (fd, ebl, ehdr, scn, xndxscn, shdr, prefix, fname,
1614 : fullname);
1615 : }
1616 : }
1617 :
1618 108 : if (! any)
1619 : {
1620 0 : error (0, 0, gettext ("%s%s%s: no symbols"),
1621 : prefix ?: "", prefix ? ":" : "", fname);
1622 0 : result = 1;
1623 : }
1624 :
1625 108 : out:
1626 : /* Close the ELF backend library descriptor. */
1627 108 : ebl_closebackend (ebl);
1628 :
1629 108 : return result;
1630 : }
1631 :
1632 :
1633 : #include "debugpred.h"
|
