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Stop objdump from displaying control codes embedded in symbol names.
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1 /* objdump.c -- dump information about an object file.
2 Copyright (C) 1990-2019 Free Software Foundation, Inc.
3
4 This file is part of GNU Binutils.
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3, or (at your option)
9 any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, 51 Franklin Street - Fifth Floor, Boston,
19 MA 02110-1301, USA. */
20
21
22 /* Objdump overview.
23
24 Objdump displays information about one or more object files, either on
25 their own, or inside libraries. It is commonly used as a disassembler,
26 but it can also display information about file headers, symbol tables,
27 relocations, debugging directives and more.
28
29 The flow of execution is as follows:
30
31 1. Command line arguments are checked for control switches and the
32 information to be displayed is selected.
33
34 2. Any remaining arguments are assumed to be object files, and they are
35 processed in order by display_bfd(). If the file is an archive each
36 of its elements is processed in turn.
37
38 3. The file's target architecture and binary file format are determined
39 by bfd_check_format(). If they are recognised, then dump_bfd() is
40 called.
41
42 4. dump_bfd() in turn calls separate functions to display the requested
43 item(s) of information(s). For example disassemble_data() is called if
44 a disassembly has been requested.
45
46 When disassembling the code loops through blocks of instructions bounded
47 by symbols, calling disassemble_bytes() on each block. The actual
48 disassembling is done by the libopcodes library, via a function pointer
49 supplied by the disassembler() function. */
50
51 #include "sysdep.h"
52 #include "bfd.h"
53 #include "elf-bfd.h"
54 #include "coff-bfd.h"
55 #include "progress.h"
56 #include "bucomm.h"
57 #include "elfcomm.h"
58 #include "dwarf.h"
59 #include "getopt.h"
60 #include "safe-ctype.h"
61 #include "dis-asm.h"
62 #include "libiberty.h"
63 #include "demangle.h"
64 #include "filenames.h"
65 #include "debug.h"
66 #include "budbg.h"
67 #include "objdump.h"
68
69 #ifdef HAVE_MMAP
70 #include <sys/mman.h>
71 #endif
72
73 /* Internal headers for the ELF .stab-dump code - sorry. */
74 #define BYTES_IN_WORD 32
75 #include "aout/aout64.h"
76
77 /* Exit status. */
78 static int exit_status = 0;
79
80 static char *default_target = NULL; /* Default at runtime. */
81
82 /* The following variables are set based on arguments passed on the
83 command line. */
84 static int show_version = 0; /* Show the version number. */
85 static int dump_section_contents; /* -s */
86 static int dump_section_headers; /* -h */
87 static bfd_boolean dump_file_header; /* -f */
88 static int dump_symtab; /* -t */
89 static int dump_dynamic_symtab; /* -T */
90 static int dump_reloc_info; /* -r */
91 static int dump_dynamic_reloc_info; /* -R */
92 static int dump_ar_hdrs; /* -a */
93 static int dump_private_headers; /* -p */
94 static char *dump_private_options; /* -P */
95 static int prefix_addresses; /* --prefix-addresses */
96 static int with_line_numbers; /* -l */
97 static bfd_boolean with_source_code; /* -S */
98 static int show_raw_insn; /* --show-raw-insn */
99 static int dump_dwarf_section_info; /* --dwarf */
100 static int dump_stab_section_info; /* --stabs */
101 static int do_demangle; /* -C, --demangle */
102 static bfd_boolean disassemble; /* -d */
103 static bfd_boolean disassemble_all; /* -D */
104 static int disassemble_zeroes; /* --disassemble-zeroes */
105 static bfd_boolean formats_info; /* -i */
106 static int wide_output; /* -w */
107 static int insn_width; /* --insn-width */
108 static bfd_vma start_address = (bfd_vma) -1; /* --start-address */
109 static bfd_vma stop_address = (bfd_vma) -1; /* --stop-address */
110 static int dump_debugging; /* --debugging */
111 static int dump_debugging_tags; /* --debugging-tags */
112 static int suppress_bfd_header;
113 static int dump_special_syms = 0; /* --special-syms */
114 static bfd_vma adjust_section_vma = 0; /* --adjust-vma */
115 static int file_start_context = 0; /* --file-start-context */
116 static bfd_boolean display_file_offsets;/* -F */
117 static const char *prefix; /* --prefix */
118 static int prefix_strip; /* --prefix-strip */
119 static size_t prefix_length;
120 static bfd_boolean unwind_inlines; /* --inlines. */
121 static const char * disasm_sym; /* Disassembly start symbol. */
122
123 static int demangle_flags = DMGL_ANSI | DMGL_PARAMS;
124
125 /* A structure to record the sections mentioned in -j switches. */
126 struct only
127 {
128 const char * name; /* The name of the section. */
129 bfd_boolean seen; /* A flag to indicate that the section has been found in one or more input files. */
130 struct only * next; /* Pointer to the next structure in the list. */
131 };
132 /* Pointer to an array of 'only' structures.
133 This pointer is NULL if the -j switch has not been used. */
134 static struct only * only_list = NULL;
135
136 /* Variables for handling include file path table. */
137 static const char **include_paths;
138 static int include_path_count;
139
140 /* Extra info to pass to the section disassembler and address printing
141 function. */
142 struct objdump_disasm_info
143 {
144 bfd * abfd;
145 asection * sec;
146 bfd_boolean require_sec;
147 arelent ** dynrelbuf;
148 long dynrelcount;
149 disassembler_ftype disassemble_fn;
150 arelent * reloc;
151 const char * symbol;
152 };
153
154 /* Architecture to disassemble for, or default if NULL. */
155 static char *machine = NULL;
156
157 /* Target specific options to the disassembler. */
158 static char *disassembler_options = NULL;
159
160 /* Endianness to disassemble for, or default if BFD_ENDIAN_UNKNOWN. */
161 static enum bfd_endian endian = BFD_ENDIAN_UNKNOWN;
162
163 /* The symbol table. */
164 static asymbol **syms;
165
166 /* Number of symbols in `syms'. */
167 static long symcount = 0;
168
169 /* The sorted symbol table. */
170 static asymbol **sorted_syms;
171
172 /* Number of symbols in `sorted_syms'. */
173 static long sorted_symcount = 0;
174
175 /* The dynamic symbol table. */
176 static asymbol **dynsyms;
177
178 /* The synthetic symbol table. */
179 static asymbol *synthsyms;
180 static long synthcount = 0;
181
182 /* Number of symbols in `dynsyms'. */
183 static long dynsymcount = 0;
184
185 static bfd_byte *stabs;
186 static bfd_size_type stab_size;
187
188 static bfd_byte *strtab;
189 static bfd_size_type stabstr_size;
190
191 static bfd_boolean is_relocatable = FALSE;
192
193 /* Handlers for -P/--private. */
194 static const struct objdump_private_desc * const objdump_private_vectors[] =
195 {
196 OBJDUMP_PRIVATE_VECTORS
197 NULL
198 };
199 \f
200 static void usage (FILE *, int) ATTRIBUTE_NORETURN;
201 static void
202 usage (FILE *stream, int status)
203 {
204 fprintf (stream, _("Usage: %s <option(s)> <file(s)>\n"), program_name);
205 fprintf (stream, _(" Display information from object <file(s)>.\n"));
206 fprintf (stream, _(" At least one of the following switches must be given:\n"));
207 fprintf (stream, _("\
208 -a, --archive-headers Display archive header information\n\
209 -f, --file-headers Display the contents of the overall file header\n\
210 -p, --private-headers Display object format specific file header contents\n\
211 -P, --private=OPT,OPT... Display object format specific contents\n\
212 -h, --[section-]headers Display the contents of the section headers\n\
213 -x, --all-headers Display the contents of all headers\n\
214 -d, --disassemble Display assembler contents of executable sections\n\
215 -D, --disassemble-all Display assembler contents of all sections\n\
216 --disassemble=<sym> Display assembler contents from <sym>\n\
217 -S, --source Intermix source code with disassembly\n\
218 -s, --full-contents Display the full contents of all sections requested\n\
219 -g, --debugging Display debug information in object file\n\
220 -e, --debugging-tags Display debug information using ctags style\n\
221 -G, --stabs Display (in raw form) any STABS info in the file\n\
222 -W[lLiaprmfFsoRtUuTgAckK] or\n\
223 --dwarf[=rawline,=decodedline,=info,=abbrev,=pubnames,=aranges,=macro,=frames,\n\
224 =frames-interp,=str,=loc,=Ranges,=pubtypes,\n\
225 =gdb_index,=trace_info,=trace_abbrev,=trace_aranges,\n\
226 =addr,=cu_index,=links,=follow-links]\n\
227 Display DWARF info in the file\n\
228 -t, --syms Display the contents of the symbol table(s)\n\
229 -T, --dynamic-syms Display the contents of the dynamic symbol table\n\
230 -r, --reloc Display the relocation entries in the file\n\
231 -R, --dynamic-reloc Display the dynamic relocation entries in the file\n\
232 @<file> Read options from <file>\n\
233 -v, --version Display this program's version number\n\
234 -i, --info List object formats and architectures supported\n\
235 -H, --help Display this information\n\
236 "));
237 if (status != 2)
238 {
239 const struct objdump_private_desc * const *desc;
240
241 fprintf (stream, _("\n The following switches are optional:\n"));
242 fprintf (stream, _("\
243 -b, --target=BFDNAME Specify the target object format as BFDNAME\n\
244 -m, --architecture=MACHINE Specify the target architecture as MACHINE\n\
245 -j, --section=NAME Only display information for section NAME\n\
246 -M, --disassembler-options=OPT Pass text OPT on to the disassembler\n\
247 -EB --endian=big Assume big endian format when disassembling\n\
248 -EL --endian=little Assume little endian format when disassembling\n\
249 --file-start-context Include context from start of file (with -S)\n\
250 -I, --include=DIR Add DIR to search list for source files\n\
251 -l, --line-numbers Include line numbers and filenames in output\n\
252 -F, --file-offsets Include file offsets when displaying information\n\
253 -C, --demangle[=STYLE] Decode mangled/processed symbol names\n\
254 The STYLE, if specified, can be `auto', `gnu',\n\
255 `lucid', `arm', `hp', `edg', `gnu-v3', `java'\n\
256 or `gnat'\n\
257 --recurse-limit Enable a limit on recursion whilst demangling. [Default]\n\
258 --no-recurse-limit Disable a limit on recursion whilst demangling\n\
259 -w, --wide Format output for more than 80 columns\n\
260 -z, --disassemble-zeroes Do not skip blocks of zeroes when disassembling\n\
261 --start-address=ADDR Only process data whose address is >= ADDR\n\
262 --stop-address=ADDR Only process data whose address is <= ADDR\n\
263 --prefix-addresses Print complete address alongside disassembly\n\
264 --[no-]show-raw-insn Display hex alongside symbolic disassembly\n\
265 --insn-width=WIDTH Display WIDTH bytes on a single line for -d\n\
266 --adjust-vma=OFFSET Add OFFSET to all displayed section addresses\n\
267 --special-syms Include special symbols in symbol dumps\n\
268 --inlines Print all inlines for source line (with -l)\n\
269 --prefix=PREFIX Add PREFIX to absolute paths for -S\n\
270 --prefix-strip=LEVEL Strip initial directory names for -S\n"));
271 fprintf (stream, _("\
272 --dwarf-depth=N Do not display DIEs at depth N or greater\n\
273 --dwarf-start=N Display DIEs starting with N, at the same depth\n\
274 or deeper\n\
275 --dwarf-check Make additional dwarf internal consistency checks.\
276 \n\n"));
277 list_supported_targets (program_name, stream);
278 list_supported_architectures (program_name, stream);
279
280 disassembler_usage (stream);
281
282 if (objdump_private_vectors[0] != NULL)
283 {
284 fprintf (stream,
285 _("\nOptions supported for -P/--private switch:\n"));
286 for (desc = objdump_private_vectors; *desc != NULL; desc++)
287 (*desc)->help (stream);
288 }
289 }
290 if (REPORT_BUGS_TO[0] && status == 0)
291 fprintf (stream, _("Report bugs to %s.\n"), REPORT_BUGS_TO);
292 exit (status);
293 }
294
295 /* 150 isn't special; it's just an arbitrary non-ASCII char value. */
296 enum option_values
297 {
298 OPTION_ENDIAN=150,
299 OPTION_START_ADDRESS,
300 OPTION_STOP_ADDRESS,
301 OPTION_DWARF,
302 OPTION_PREFIX,
303 OPTION_PREFIX_STRIP,
304 OPTION_INSN_WIDTH,
305 OPTION_ADJUST_VMA,
306 OPTION_DWARF_DEPTH,
307 OPTION_DWARF_CHECK,
308 OPTION_DWARF_START,
309 OPTION_RECURSE_LIMIT,
310 OPTION_NO_RECURSE_LIMIT,
311 OPTION_INLINES
312 };
313
314 static struct option long_options[]=
315 {
316 {"adjust-vma", required_argument, NULL, OPTION_ADJUST_VMA},
317 {"all-headers", no_argument, NULL, 'x'},
318 {"private-headers", no_argument, NULL, 'p'},
319 {"private", required_argument, NULL, 'P'},
320 {"architecture", required_argument, NULL, 'm'},
321 {"archive-headers", no_argument, NULL, 'a'},
322 {"debugging", no_argument, NULL, 'g'},
323 {"debugging-tags", no_argument, NULL, 'e'},
324 {"demangle", optional_argument, NULL, 'C'},
325 {"disassemble", optional_argument, NULL, 'd'},
326 {"disassemble-all", no_argument, NULL, 'D'},
327 {"disassembler-options", required_argument, NULL, 'M'},
328 {"disassemble-zeroes", no_argument, NULL, 'z'},
329 {"dynamic-reloc", no_argument, NULL, 'R'},
330 {"dynamic-syms", no_argument, NULL, 'T'},
331 {"endian", required_argument, NULL, OPTION_ENDIAN},
332 {"file-headers", no_argument, NULL, 'f'},
333 {"file-offsets", no_argument, NULL, 'F'},
334 {"file-start-context", no_argument, &file_start_context, 1},
335 {"full-contents", no_argument, NULL, 's'},
336 {"headers", no_argument, NULL, 'h'},
337 {"help", no_argument, NULL, 'H'},
338 {"info", no_argument, NULL, 'i'},
339 {"line-numbers", no_argument, NULL, 'l'},
340 {"no-show-raw-insn", no_argument, &show_raw_insn, -1},
341 {"prefix-addresses", no_argument, &prefix_addresses, 1},
342 {"recurse-limit", no_argument, NULL, OPTION_RECURSE_LIMIT},
343 {"recursion-limit", no_argument, NULL, OPTION_RECURSE_LIMIT},
344 {"no-recurse-limit", no_argument, NULL, OPTION_NO_RECURSE_LIMIT},
345 {"no-recursion-limit", no_argument, NULL, OPTION_NO_RECURSE_LIMIT},
346 {"reloc", no_argument, NULL, 'r'},
347 {"section", required_argument, NULL, 'j'},
348 {"section-headers", no_argument, NULL, 'h'},
349 {"show-raw-insn", no_argument, &show_raw_insn, 1},
350 {"source", no_argument, NULL, 'S'},
351 {"special-syms", no_argument, &dump_special_syms, 1},
352 {"include", required_argument, NULL, 'I'},
353 {"dwarf", optional_argument, NULL, OPTION_DWARF},
354 {"stabs", no_argument, NULL, 'G'},
355 {"start-address", required_argument, NULL, OPTION_START_ADDRESS},
356 {"stop-address", required_argument, NULL, OPTION_STOP_ADDRESS},
357 {"syms", no_argument, NULL, 't'},
358 {"target", required_argument, NULL, 'b'},
359 {"version", no_argument, NULL, 'V'},
360 {"wide", no_argument, NULL, 'w'},
361 {"prefix", required_argument, NULL, OPTION_PREFIX},
362 {"prefix-strip", required_argument, NULL, OPTION_PREFIX_STRIP},
363 {"insn-width", required_argument, NULL, OPTION_INSN_WIDTH},
364 {"dwarf-depth", required_argument, 0, OPTION_DWARF_DEPTH},
365 {"dwarf-start", required_argument, 0, OPTION_DWARF_START},
366 {"dwarf-check", no_argument, 0, OPTION_DWARF_CHECK},
367 {"inlines", no_argument, 0, OPTION_INLINES},
368 {0, no_argument, 0, 0}
369 };
370 \f
371 static void
372 nonfatal (const char *msg)
373 {
374 bfd_nonfatal (msg);
375 exit_status = 1;
376 }
377
378 /* Returns a version of IN with any control characters
379 replaced by escape sequences. Uses a static buffer
380 if necessary. */
381
382 static const char *
383 sanitize_string (const char * in)
384 {
385 static char * buffer = NULL;
386 static unsigned int buffer_len = 0;
387 const char * original = in;
388 char * out;
389
390 /* Paranoia. */
391 if (in == NULL)
392 return "";
393
394 /* See if any conversion is necessary. In the majority
395 of cases it will not be needed. */
396 do
397 {
398 char c = *in++;
399
400 if (c == 0)
401 return original;
402
403 if (ISCNTRL (c))
404 break;
405 }
406 while (1);
407
408 /* Copy the input, translating as needed. */
409 in = original;
410 if (buffer_len < (strlen (in) * 2))
411 {
412 free ((void *) buffer);
413 buffer_len = strlen (in) * 2;
414 buffer = xmalloc (buffer_len + 1);
415 }
416
417 out = buffer;
418 do
419 {
420 char c = *in++;
421
422 if (c == 0)
423 break;
424
425 if (!ISCNTRL (c))
426 *out++ = c;
427 else
428 {
429 *out++ = '^';
430 *out++ = c + 0x40;
431 }
432 }
433 while (1);
434
435 *out = 0;
436 return buffer;
437 }
438
439 \f
440 /* Returns TRUE if the specified section should be dumped. */
441
442 static bfd_boolean
443 process_section_p (asection * section)
444 {
445 struct only * only;
446
447 if (only_list == NULL)
448 return TRUE;
449
450 for (only = only_list; only; only = only->next)
451 if (strcmp (only->name, section->name) == 0)
452 {
453 only->seen = TRUE;
454 return TRUE;
455 }
456
457 return FALSE;
458 }
459
460 /* Add an entry to the 'only' list. */
461
462 static void
463 add_only (char * name)
464 {
465 struct only * only;
466
467 /* First check to make sure that we do not
468 already have an entry for this name. */
469 for (only = only_list; only; only = only->next)
470 if (strcmp (only->name, name) == 0)
471 return;
472
473 only = xmalloc (sizeof * only);
474 only->name = name;
475 only->seen = FALSE;
476 only->next = only_list;
477 only_list = only;
478 }
479
480 /* Release the memory used by the 'only' list.
481 PR 11225: Issue a warning message for unseen sections.
482 Only do this if none of the sections were seen. This is mainly to support
483 tools like the GAS testsuite where an object file is dumped with a list of
484 generic section names known to be present in a range of different file
485 formats. */
486
487 static void
488 free_only_list (void)
489 {
490 bfd_boolean at_least_one_seen = FALSE;
491 struct only * only;
492 struct only * next;
493
494 if (only_list == NULL)
495 return;
496
497 for (only = only_list; only; only = only->next)
498 if (only->seen)
499 {
500 at_least_one_seen = TRUE;
501 break;
502 }
503
504 for (only = only_list; only; only = next)
505 {
506 if (! at_least_one_seen)
507 {
508 non_fatal (_("section '%s' mentioned in a -j option, "
509 "but not found in any input file"),
510 only->name);
511 exit_status = 1;
512 }
513 next = only->next;
514 free (only);
515 }
516 }
517
518 \f
519 static void
520 dump_section_header (bfd *abfd, asection *section, void *data)
521 {
522 char *comma = "";
523 unsigned int opb = bfd_octets_per_byte (abfd);
524 int longest_section_name = *((int *) data);
525
526 /* Ignore linker created section. See elfNN_ia64_object_p in
527 bfd/elfxx-ia64.c. */
528 if (section->flags & SEC_LINKER_CREATED)
529 return;
530
531 /* PR 10413: Skip sections that we are ignoring. */
532 if (! process_section_p (section))
533 return;
534
535 printf ("%3d %-*s %08lx ", section->index, longest_section_name,
536 sanitize_string (bfd_get_section_name (abfd, section)),
537 (unsigned long) bfd_section_size (abfd, section) / opb);
538 bfd_printf_vma (abfd, bfd_get_section_vma (abfd, section));
539 printf (" ");
540 bfd_printf_vma (abfd, section->lma);
541 printf (" %08lx 2**%u", (unsigned long) section->filepos,
542 bfd_get_section_alignment (abfd, section));
543 if (! wide_output)
544 printf ("\n ");
545 printf (" ");
546
547 #define PF(x, y) \
548 if (section->flags & x) { printf ("%s%s", comma, y); comma = ", "; }
549
550 PF (SEC_HAS_CONTENTS, "CONTENTS");
551 PF (SEC_ALLOC, "ALLOC");
552 PF (SEC_CONSTRUCTOR, "CONSTRUCTOR");
553 PF (SEC_LOAD, "LOAD");
554 PF (SEC_RELOC, "RELOC");
555 PF (SEC_READONLY, "READONLY");
556 PF (SEC_CODE, "CODE");
557 PF (SEC_DATA, "DATA");
558 PF (SEC_ROM, "ROM");
559 PF (SEC_DEBUGGING, "DEBUGGING");
560 PF (SEC_NEVER_LOAD, "NEVER_LOAD");
561 PF (SEC_EXCLUDE, "EXCLUDE");
562 PF (SEC_SORT_ENTRIES, "SORT_ENTRIES");
563 if (bfd_get_arch (abfd) == bfd_arch_tic54x)
564 {
565 PF (SEC_TIC54X_BLOCK, "BLOCK");
566 PF (SEC_TIC54X_CLINK, "CLINK");
567 }
568 PF (SEC_SMALL_DATA, "SMALL_DATA");
569 if (bfd_get_flavour (abfd) == bfd_target_coff_flavour)
570 {
571 PF (SEC_COFF_SHARED, "SHARED");
572 PF (SEC_COFF_NOREAD, "NOREAD");
573 }
574 else if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
575 PF (SEC_ELF_PURECODE, "PURECODE");
576 PF (SEC_THREAD_LOCAL, "THREAD_LOCAL");
577 PF (SEC_GROUP, "GROUP");
578 if (bfd_get_arch (abfd) == bfd_arch_mep)
579 {
580 PF (SEC_MEP_VLIW, "VLIW");
581 }
582
583 if ((section->flags & SEC_LINK_ONCE) != 0)
584 {
585 const char *ls;
586 struct coff_comdat_info *comdat;
587
588 switch (section->flags & SEC_LINK_DUPLICATES)
589 {
590 default:
591 abort ();
592 case SEC_LINK_DUPLICATES_DISCARD:
593 ls = "LINK_ONCE_DISCARD";
594 break;
595 case SEC_LINK_DUPLICATES_ONE_ONLY:
596 ls = "LINK_ONCE_ONE_ONLY";
597 break;
598 case SEC_LINK_DUPLICATES_SAME_SIZE:
599 ls = "LINK_ONCE_SAME_SIZE";
600 break;
601 case SEC_LINK_DUPLICATES_SAME_CONTENTS:
602 ls = "LINK_ONCE_SAME_CONTENTS";
603 break;
604 }
605 printf ("%s%s", comma, ls);
606
607 comdat = bfd_coff_get_comdat_section (abfd, section);
608 if (comdat != NULL)
609 printf (" (COMDAT %s %ld)", comdat->name, comdat->symbol);
610
611 comma = ", ";
612 }
613
614 printf ("\n");
615 #undef PF
616 }
617
618 /* Called on each SECTION in ABFD, update the int variable pointed to by
619 DATA which contains the string length of the longest section name. */
620
621 static void
622 find_longest_section_name (bfd *abfd, asection *section, void *data)
623 {
624 int *longest_so_far = (int *) data;
625 const char *name;
626 int len;
627
628 /* Ignore linker created section. */
629 if (section->flags & SEC_LINKER_CREATED)
630 return;
631
632 /* Skip sections that we are ignoring. */
633 if (! process_section_p (section))
634 return;
635
636 name = bfd_get_section_name (abfd, section);
637 len = (int) strlen (name);
638 if (len > *longest_so_far)
639 *longest_so_far = len;
640 }
641
642 static void
643 dump_headers (bfd *abfd)
644 {
645 /* The default width of 13 is just an arbitrary choice. */
646 int max_section_name_length = 13;
647 int bfd_vma_width;
648
649 #ifndef BFD64
650 bfd_vma_width = 10;
651 #else
652 /* With BFD64, non-ELF returns -1 and wants always 64 bit addresses. */
653 if (bfd_get_arch_size (abfd) == 32)
654 bfd_vma_width = 10;
655 else
656 bfd_vma_width = 18;
657 #endif
658
659 printf (_("Sections:\n"));
660
661 if (wide_output)
662 bfd_map_over_sections (abfd, find_longest_section_name,
663 &max_section_name_length);
664
665 printf (_("Idx %-*s Size %-*s%-*sFile off Algn"),
666 max_section_name_length, "Name",
667 bfd_vma_width, "VMA",
668 bfd_vma_width, "LMA");
669
670 if (wide_output)
671 printf (_(" Flags"));
672 printf ("\n");
673
674 bfd_map_over_sections (abfd, dump_section_header,
675 &max_section_name_length);
676 }
677 \f
678 static asymbol **
679 slurp_symtab (bfd *abfd)
680 {
681 asymbol **sy = NULL;
682 long storage;
683
684 if (!(bfd_get_file_flags (abfd) & HAS_SYMS))
685 {
686 symcount = 0;
687 return NULL;
688 }
689
690 storage = bfd_get_symtab_upper_bound (abfd);
691 if (storage < 0)
692 {
693 non_fatal (_("failed to read symbol table from: %s"), bfd_get_filename (abfd));
694 bfd_fatal (_("error message was"));
695 }
696 if (storage)
697 sy = (asymbol **) xmalloc (storage);
698
699 symcount = bfd_canonicalize_symtab (abfd, sy);
700 if (symcount < 0)
701 bfd_fatal (bfd_get_filename (abfd));
702 return sy;
703 }
704
705 /* Read in the dynamic symbols. */
706
707 static asymbol **
708 slurp_dynamic_symtab (bfd *abfd)
709 {
710 asymbol **sy = NULL;
711 long storage;
712
713 storage = bfd_get_dynamic_symtab_upper_bound (abfd);
714 if (storage < 0)
715 {
716 if (!(bfd_get_file_flags (abfd) & DYNAMIC))
717 {
718 non_fatal (_("%s: not a dynamic object"), bfd_get_filename (abfd));
719 exit_status = 1;
720 dynsymcount = 0;
721 return NULL;
722 }
723
724 bfd_fatal (bfd_get_filename (abfd));
725 }
726 if (storage)
727 sy = (asymbol **) xmalloc (storage);
728
729 dynsymcount = bfd_canonicalize_dynamic_symtab (abfd, sy);
730 if (dynsymcount < 0)
731 bfd_fatal (bfd_get_filename (abfd));
732 return sy;
733 }
734
735 /* Some symbol names are significant and should be kept in the
736 table of sorted symbol names, even if they are marked as
737 debugging/section symbols. */
738
739 static bfd_boolean
740 is_significant_symbol_name (const char * name)
741 {
742 return strncmp (name, ".plt", 4) == 0 || strcmp (name, ".got") == 0;
743 }
744
745 /* Filter out (in place) symbols that are useless for disassembly.
746 COUNT is the number of elements in SYMBOLS.
747 Return the number of useful symbols. */
748
749 static long
750 remove_useless_symbols (asymbol **symbols, long count)
751 {
752 asymbol **in_ptr = symbols, **out_ptr = symbols;
753
754 while (--count >= 0)
755 {
756 asymbol *sym = *in_ptr++;
757
758 if (sym->name == NULL || sym->name[0] == '\0')
759 continue;
760 if ((sym->flags & (BSF_DEBUGGING | BSF_SECTION_SYM))
761 && ! is_significant_symbol_name (sym->name))
762 continue;
763 if (bfd_is_und_section (sym->section)
764 || bfd_is_com_section (sym->section))
765 continue;
766
767 *out_ptr++ = sym;
768 }
769 return out_ptr - symbols;
770 }
771
772 /* Sort symbols into value order. */
773
774 static int
775 compare_symbols (const void *ap, const void *bp)
776 {
777 const asymbol *a = * (const asymbol **) ap;
778 const asymbol *b = * (const asymbol **) bp;
779 const char *an;
780 const char *bn;
781 size_t anl;
782 size_t bnl;
783 bfd_boolean af;
784 bfd_boolean bf;
785 flagword aflags;
786 flagword bflags;
787
788 if (bfd_asymbol_value (a) > bfd_asymbol_value (b))
789 return 1;
790 else if (bfd_asymbol_value (a) < bfd_asymbol_value (b))
791 return -1;
792
793 if (a->section > b->section)
794 return 1;
795 else if (a->section < b->section)
796 return -1;
797
798 an = bfd_asymbol_name (a);
799 bn = bfd_asymbol_name (b);
800 anl = strlen (an);
801 bnl = strlen (bn);
802
803 /* The symbols gnu_compiled and gcc2_compiled convey no real
804 information, so put them after other symbols with the same value. */
805 af = (strstr (an, "gnu_compiled") != NULL
806 || strstr (an, "gcc2_compiled") != NULL);
807 bf = (strstr (bn, "gnu_compiled") != NULL
808 || strstr (bn, "gcc2_compiled") != NULL);
809
810 if (af && ! bf)
811 return 1;
812 if (! af && bf)
813 return -1;
814
815 /* We use a heuristic for the file name, to try to sort it after
816 more useful symbols. It may not work on non Unix systems, but it
817 doesn't really matter; the only difference is precisely which
818 symbol names get printed. */
819
820 #define file_symbol(s, sn, snl) \
821 (((s)->flags & BSF_FILE) != 0 \
822 || ((sn)[(snl) - 2] == '.' \
823 && ((sn)[(snl) - 1] == 'o' \
824 || (sn)[(snl) - 1] == 'a')))
825
826 af = file_symbol (a, an, anl);
827 bf = file_symbol (b, bn, bnl);
828
829 if (af && ! bf)
830 return 1;
831 if (! af && bf)
832 return -1;
833
834 /* Try to sort global symbols before local symbols before function
835 symbols before debugging symbols. */
836
837 aflags = a->flags;
838 bflags = b->flags;
839
840 if ((aflags & BSF_DEBUGGING) != (bflags & BSF_DEBUGGING))
841 {
842 if ((aflags & BSF_DEBUGGING) != 0)
843 return 1;
844 else
845 return -1;
846 }
847 if ((aflags & BSF_FUNCTION) != (bflags & BSF_FUNCTION))
848 {
849 if ((aflags & BSF_FUNCTION) != 0)
850 return -1;
851 else
852 return 1;
853 }
854 if ((aflags & BSF_LOCAL) != (bflags & BSF_LOCAL))
855 {
856 if ((aflags & BSF_LOCAL) != 0)
857 return 1;
858 else
859 return -1;
860 }
861 if ((aflags & BSF_GLOBAL) != (bflags & BSF_GLOBAL))
862 {
863 if ((aflags & BSF_GLOBAL) != 0)
864 return -1;
865 else
866 return 1;
867 }
868
869 if (bfd_get_flavour (bfd_asymbol_bfd (a)) == bfd_target_elf_flavour
870 && bfd_get_flavour (bfd_asymbol_bfd (b)) == bfd_target_elf_flavour)
871 {
872 bfd_vma asz, bsz;
873
874 asz = 0;
875 if ((a->flags & (BSF_SECTION_SYM | BSF_SYNTHETIC)) == 0)
876 asz = ((elf_symbol_type *) a)->internal_elf_sym.st_size;
877 bsz = 0;
878 if ((b->flags & (BSF_SECTION_SYM | BSF_SYNTHETIC)) == 0)
879 bsz = ((elf_symbol_type *) b)->internal_elf_sym.st_size;
880 if (asz != bsz)
881 return asz > bsz ? -1 : 1;
882 }
883
884 /* Symbols that start with '.' might be section names, so sort them
885 after symbols that don't start with '.'. */
886 if (an[0] == '.' && bn[0] != '.')
887 return 1;
888 if (an[0] != '.' && bn[0] == '.')
889 return -1;
890
891 /* Finally, if we can't distinguish them in any other way, try to
892 get consistent results by sorting the symbols by name. */
893 return strcmp (an, bn);
894 }
895
896 /* Sort relocs into address order. */
897
898 static int
899 compare_relocs (const void *ap, const void *bp)
900 {
901 const arelent *a = * (const arelent **) ap;
902 const arelent *b = * (const arelent **) bp;
903
904 if (a->address > b->address)
905 return 1;
906 else if (a->address < b->address)
907 return -1;
908
909 /* So that associated relocations tied to the same address show up
910 in the correct order, we don't do any further sorting. */
911 if (a > b)
912 return 1;
913 else if (a < b)
914 return -1;
915 else
916 return 0;
917 }
918
919 /* Print an address (VMA) to the output stream in INFO.
920 If SKIP_ZEROES is TRUE, omit leading zeroes. */
921
922 static void
923 objdump_print_value (bfd_vma vma, struct disassemble_info *inf,
924 bfd_boolean skip_zeroes)
925 {
926 char buf[30];
927 char *p;
928 struct objdump_disasm_info *aux;
929
930 aux = (struct objdump_disasm_info *) inf->application_data;
931 bfd_sprintf_vma (aux->abfd, buf, vma);
932 if (! skip_zeroes)
933 p = buf;
934 else
935 {
936 for (p = buf; *p == '0'; ++p)
937 ;
938 if (*p == '\0')
939 --p;
940 }
941 (*inf->fprintf_func) (inf->stream, "%s", p);
942 }
943
944 /* Print the name of a symbol. */
945
946 static void
947 objdump_print_symname (bfd *abfd, struct disassemble_info *inf,
948 asymbol *sym)
949 {
950 char *alloc;
951 const char *name, *version_string = NULL;
952 bfd_boolean hidden = FALSE;
953
954 alloc = NULL;
955 name = bfd_asymbol_name (sym);
956 if (do_demangle && name[0] != '\0')
957 {
958 /* Demangle the name. */
959 alloc = bfd_demangle (abfd, name, demangle_flags);
960 if (alloc != NULL)
961 name = alloc;
962 }
963
964 if ((sym->flags & (BSF_SECTION_SYM | BSF_SYNTHETIC)) == 0)
965 version_string = bfd_get_symbol_version_string (abfd, sym, &hidden);
966
967 if (bfd_is_und_section (bfd_get_section (sym)))
968 hidden = TRUE;
969
970 name = sanitize_string (name);
971
972 if (inf != NULL)
973 {
974 (*inf->fprintf_func) (inf->stream, "%s", name);
975 if (version_string && *version_string != '\0')
976 (*inf->fprintf_func) (inf->stream, hidden ? "@%s" : "@@%s",
977 version_string);
978 }
979 else
980 {
981 printf ("%s", name);
982 if (version_string && *version_string != '\0')
983 printf (hidden ? "@%s" : "@@%s", version_string);
984 }
985
986 if (alloc != NULL)
987 free (alloc);
988 }
989
990 /* Locate a symbol given a bfd and a section (from INFO->application_data),
991 and a VMA. If INFO->application_data->require_sec is TRUE, then always
992 require the symbol to be in the section. Returns NULL if there is no
993 suitable symbol. If PLACE is not NULL, then *PLACE is set to the index
994 of the symbol in sorted_syms. */
995
996 static asymbol *
997 find_symbol_for_address (bfd_vma vma,
998 struct disassemble_info *inf,
999 long *place)
1000 {
1001 /* @@ Would it speed things up to cache the last two symbols returned,
1002 and maybe their address ranges? For many processors, only one memory
1003 operand can be present at a time, so the 2-entry cache wouldn't be
1004 constantly churned by code doing heavy memory accesses. */
1005
1006 /* Indices in `sorted_syms'. */
1007 long min = 0;
1008 long max_count = sorted_symcount;
1009 long thisplace;
1010 struct objdump_disasm_info *aux;
1011 bfd *abfd;
1012 asection *sec;
1013 unsigned int opb;
1014 bfd_boolean want_section;
1015 long rel_count;
1016
1017 if (sorted_symcount < 1)
1018 return NULL;
1019
1020 aux = (struct objdump_disasm_info *) inf->application_data;
1021 abfd = aux->abfd;
1022 sec = aux->sec;
1023 opb = inf->octets_per_byte;
1024
1025 /* Perform a binary search looking for the closest symbol to the
1026 required value. We are searching the range (min, max_count]. */
1027 while (min + 1 < max_count)
1028 {
1029 asymbol *sym;
1030
1031 thisplace = (max_count + min) / 2;
1032 sym = sorted_syms[thisplace];
1033
1034 if (bfd_asymbol_value (sym) > vma)
1035 max_count = thisplace;
1036 else if (bfd_asymbol_value (sym) < vma)
1037 min = thisplace;
1038 else
1039 {
1040 min = thisplace;
1041 break;
1042 }
1043 }
1044
1045 /* The symbol we want is now in min, the low end of the range we
1046 were searching. If there are several symbols with the same
1047 value, we want the first (non-section/non-debugging) one. */
1048 thisplace = min;
1049 while (thisplace > 0
1050 && (bfd_asymbol_value (sorted_syms[thisplace])
1051 == bfd_asymbol_value (sorted_syms[thisplace - 1]))
1052 && ((sorted_syms[thisplace - 1]->flags
1053 & (BSF_SECTION_SYM | BSF_DEBUGGING)) == 0)
1054 )
1055 --thisplace;
1056
1057 /* Prefer a symbol in the current section if we have multple symbols
1058 with the same value, as can occur with overlays or zero size
1059 sections. */
1060 min = thisplace;
1061 while (min < max_count
1062 && (bfd_asymbol_value (sorted_syms[min])
1063 == bfd_asymbol_value (sorted_syms[thisplace])))
1064 {
1065 if (sorted_syms[min]->section == sec
1066 && inf->symbol_is_valid (sorted_syms[min], inf))
1067 {
1068 thisplace = min;
1069
1070 if (place != NULL)
1071 *place = thisplace;
1072
1073 return sorted_syms[thisplace];
1074 }
1075 ++min;
1076 }
1077
1078 /* If the file is relocatable, and the symbol could be from this
1079 section, prefer a symbol from this section over symbols from
1080 others, even if the other symbol's value might be closer.
1081
1082 Note that this may be wrong for some symbol references if the
1083 sections have overlapping memory ranges, but in that case there's
1084 no way to tell what's desired without looking at the relocation
1085 table.
1086
1087 Also give the target a chance to reject symbols. */
1088 want_section = (aux->require_sec
1089 || ((abfd->flags & HAS_RELOC) != 0
1090 && vma >= bfd_get_section_vma (abfd, sec)
1091 && vma < (bfd_get_section_vma (abfd, sec)
1092 + bfd_section_size (abfd, sec) / opb)));
1093 if ((sorted_syms[thisplace]->section != sec && want_section)
1094 || ! inf->symbol_is_valid (sorted_syms[thisplace], inf))
1095 {
1096 long i;
1097 long newplace = sorted_symcount;
1098
1099 for (i = min - 1; i >= 0; i--)
1100 {
1101 if ((sorted_syms[i]->section == sec || !want_section)
1102 && inf->symbol_is_valid (sorted_syms[i], inf))
1103 {
1104 if (newplace == sorted_symcount)
1105 newplace = i;
1106
1107 if (bfd_asymbol_value (sorted_syms[i])
1108 != bfd_asymbol_value (sorted_syms[newplace]))
1109 break;
1110
1111 /* Remember this symbol and keep searching until we reach
1112 an earlier address. */
1113 newplace = i;
1114 }
1115 }
1116
1117 if (newplace != sorted_symcount)
1118 thisplace = newplace;
1119 else
1120 {
1121 /* We didn't find a good symbol with a smaller value.
1122 Look for one with a larger value. */
1123 for (i = thisplace + 1; i < sorted_symcount; i++)
1124 {
1125 if ((sorted_syms[i]->section == sec || !want_section)
1126 && inf->symbol_is_valid (sorted_syms[i], inf))
1127 {
1128 thisplace = i;
1129 break;
1130 }
1131 }
1132 }
1133
1134 if ((sorted_syms[thisplace]->section != sec && want_section)
1135 || ! inf->symbol_is_valid (sorted_syms[thisplace], inf))
1136 /* There is no suitable symbol. */
1137 return NULL;
1138 }
1139
1140 /* If we have not found an exact match for the specified address
1141 and we have dynamic relocations available, then we can produce
1142 a better result by matching a relocation to the address and
1143 using the symbol associated with that relocation. */
1144 rel_count = aux->dynrelcount;
1145 if (!want_section
1146 && sorted_syms[thisplace]->value != vma
1147 && rel_count > 0
1148 && aux->dynrelbuf != NULL
1149 && aux->dynrelbuf[0]->address <= vma
1150 && aux->dynrelbuf[rel_count - 1]->address >= vma
1151 /* If we have matched a synthetic symbol, then stick with that. */
1152 && (sorted_syms[thisplace]->flags & BSF_SYNTHETIC) == 0)
1153 {
1154 arelent ** rel_low;
1155 arelent ** rel_high;
1156
1157 rel_low = aux->dynrelbuf;
1158 rel_high = rel_low + rel_count - 1;
1159 while (rel_low <= rel_high)
1160 {
1161 arelent **rel_mid = &rel_low[(rel_high - rel_low) / 2];
1162 arelent * rel = *rel_mid;
1163
1164 if (rel->address == vma)
1165 {
1166 /* Absolute relocations do not provide a more helpful
1167 symbolic address. Find a non-absolute relocation
1168 with the same address. */
1169 arelent **rel_vma = rel_mid;
1170 for (rel_mid--;
1171 rel_mid >= rel_low && rel_mid[0]->address == vma;
1172 rel_mid--)
1173 rel_vma = rel_mid;
1174
1175 for (; rel_vma <= rel_high && rel_vma[0]->address == vma;
1176 rel_vma++)
1177 {
1178 rel = *rel_vma;
1179 if (rel->sym_ptr_ptr != NULL
1180 && ! bfd_is_abs_section ((* rel->sym_ptr_ptr)->section))
1181 {
1182 if (place != NULL)
1183 * place = thisplace;
1184 return * rel->sym_ptr_ptr;
1185 }
1186 }
1187 break;
1188 }
1189
1190 if (vma < rel->address)
1191 rel_high = rel_mid;
1192 else if (vma >= rel_mid[1]->address)
1193 rel_low = rel_mid + 1;
1194 else
1195 break;
1196 }
1197 }
1198
1199 if (place != NULL)
1200 *place = thisplace;
1201
1202 return sorted_syms[thisplace];
1203 }
1204
1205 /* Print an address and the offset to the nearest symbol. */
1206
1207 static void
1208 objdump_print_addr_with_sym (bfd *abfd, asection *sec, asymbol *sym,
1209 bfd_vma vma, struct disassemble_info *inf,
1210 bfd_boolean skip_zeroes)
1211 {
1212 objdump_print_value (vma, inf, skip_zeroes);
1213
1214 if (sym == NULL)
1215 {
1216 bfd_vma secaddr;
1217
1218 (*inf->fprintf_func) (inf->stream, " <%s",
1219 sanitize_string (bfd_get_section_name (abfd, sec)));
1220 secaddr = bfd_get_section_vma (abfd, sec);
1221 if (vma < secaddr)
1222 {
1223 (*inf->fprintf_func) (inf->stream, "-0x");
1224 objdump_print_value (secaddr - vma, inf, TRUE);
1225 }
1226 else if (vma > secaddr)
1227 {
1228 (*inf->fprintf_func) (inf->stream, "+0x");
1229 objdump_print_value (vma - secaddr, inf, TRUE);
1230 }
1231 (*inf->fprintf_func) (inf->stream, ">");
1232 }
1233 else
1234 {
1235 (*inf->fprintf_func) (inf->stream, " <");
1236
1237 objdump_print_symname (abfd, inf, sym);
1238
1239 if (bfd_asymbol_value (sym) == vma)
1240 ;
1241 /* Undefined symbols in an executables and dynamic objects do not have
1242 a value associated with them, so it does not make sense to display
1243 an offset relative to them. Normally we would not be provided with
1244 this kind of symbol, but the target backend might choose to do so,
1245 and the code in find_symbol_for_address might return an as yet
1246 unresolved symbol associated with a dynamic reloc. */
1247 else if ((bfd_get_file_flags (abfd) & (EXEC_P | DYNAMIC))
1248 && bfd_is_und_section (sym->section))
1249 ;
1250 else if (bfd_asymbol_value (sym) > vma)
1251 {
1252 (*inf->fprintf_func) (inf->stream, "-0x");
1253 objdump_print_value (bfd_asymbol_value (sym) - vma, inf, TRUE);
1254 }
1255 else if (vma > bfd_asymbol_value (sym))
1256 {
1257 (*inf->fprintf_func) (inf->stream, "+0x");
1258 objdump_print_value (vma - bfd_asymbol_value (sym), inf, TRUE);
1259 }
1260
1261 (*inf->fprintf_func) (inf->stream, ">");
1262 }
1263
1264 if (display_file_offsets)
1265 inf->fprintf_func (inf->stream, _(" (File Offset: 0x%lx)"),
1266 (long int)(sec->filepos + (vma - sec->vma)));
1267 }
1268
1269 /* Print an address (VMA), symbolically if possible.
1270 If SKIP_ZEROES is TRUE, don't output leading zeroes. */
1271
1272 static void
1273 objdump_print_addr (bfd_vma vma,
1274 struct disassemble_info *inf,
1275 bfd_boolean skip_zeroes)
1276 {
1277 struct objdump_disasm_info *aux;
1278 asymbol *sym = NULL;
1279 bfd_boolean skip_find = FALSE;
1280
1281 aux = (struct objdump_disasm_info *) inf->application_data;
1282
1283 if (sorted_symcount < 1)
1284 {
1285 (*inf->fprintf_func) (inf->stream, "0x");
1286 objdump_print_value (vma, inf, skip_zeroes);
1287
1288 if (display_file_offsets)
1289 inf->fprintf_func (inf->stream, _(" (File Offset: 0x%lx)"),
1290 (long int)(aux->sec->filepos + (vma - aux->sec->vma)));
1291 return;
1292 }
1293
1294 if (aux->reloc != NULL
1295 && aux->reloc->sym_ptr_ptr != NULL
1296 && * aux->reloc->sym_ptr_ptr != NULL)
1297 {
1298 sym = * aux->reloc->sym_ptr_ptr;
1299
1300 /* Adjust the vma to the reloc. */
1301 vma += bfd_asymbol_value (sym);
1302
1303 if (bfd_is_und_section (bfd_get_section (sym)))
1304 skip_find = TRUE;
1305 }
1306
1307 if (!skip_find)
1308 sym = find_symbol_for_address (vma, inf, NULL);
1309
1310 objdump_print_addr_with_sym (aux->abfd, aux->sec, sym, vma, inf,
1311 skip_zeroes);
1312 }
1313
1314 /* Print VMA to INFO. This function is passed to the disassembler
1315 routine. */
1316
1317 static void
1318 objdump_print_address (bfd_vma vma, struct disassemble_info *inf)
1319 {
1320 objdump_print_addr (vma, inf, ! prefix_addresses);
1321 }
1322
1323 /* Determine if the given address has a symbol associated with it. */
1324
1325 static int
1326 objdump_symbol_at_address (bfd_vma vma, struct disassemble_info * inf)
1327 {
1328 asymbol * sym;
1329
1330 sym = find_symbol_for_address (vma, inf, NULL);
1331
1332 return (sym != NULL && (bfd_asymbol_value (sym) == vma));
1333 }
1334
1335 /* Hold the last function name and the last line number we displayed
1336 in a disassembly. */
1337
1338 static char *prev_functionname;
1339 static unsigned int prev_line;
1340 static unsigned int prev_discriminator;
1341
1342 /* We keep a list of all files that we have seen when doing a
1343 disassembly with source, so that we know how much of the file to
1344 display. This can be important for inlined functions. */
1345
1346 struct print_file_list
1347 {
1348 struct print_file_list *next;
1349 const char *filename;
1350 const char *modname;
1351 const char *map;
1352 size_t mapsize;
1353 const char **linemap;
1354 unsigned maxline;
1355 unsigned last_line;
1356 unsigned max_printed;
1357 int first;
1358 };
1359
1360 static struct print_file_list *print_files;
1361
1362 /* The number of preceding context lines to show when we start
1363 displaying a file for the first time. */
1364
1365 #define SHOW_PRECEDING_CONTEXT_LINES (5)
1366
1367 /* Read a complete file into memory. */
1368
1369 static const char *
1370 slurp_file (const char *fn, size_t *size, struct stat *fst)
1371 {
1372 #ifdef HAVE_MMAP
1373 int ps = getpagesize ();
1374 size_t msize;
1375 #endif
1376 const char *map;
1377 int fd = open (fn, O_RDONLY | O_BINARY);
1378
1379 if (fd < 0)
1380 return NULL;
1381 if (fstat (fd, fst) < 0)
1382 {
1383 close (fd);
1384 return NULL;
1385 }
1386 *size = fst->st_size;
1387 #ifdef HAVE_MMAP
1388 msize = (*size + ps - 1) & ~(ps - 1);
1389 map = mmap (NULL, msize, PROT_READ, MAP_SHARED, fd, 0);
1390 if (map != (char *) -1L)
1391 {
1392 close (fd);
1393 return map;
1394 }
1395 #endif
1396 map = (const char *) malloc (*size);
1397 if (!map || (size_t) read (fd, (char *) map, *size) != *size)
1398 {
1399 free ((void *) map);
1400 map = NULL;
1401 }
1402 close (fd);
1403 return map;
1404 }
1405
1406 #define line_map_decrease 5
1407
1408 /* Precompute array of lines for a mapped file. */
1409
1410 static const char **
1411 index_file (const char *map, size_t size, unsigned int *maxline)
1412 {
1413 const char *p, *lstart, *end;
1414 int chars_per_line = 45; /* First iteration will use 40. */
1415 unsigned int lineno;
1416 const char **linemap = NULL;
1417 unsigned long line_map_size = 0;
1418
1419 lineno = 0;
1420 lstart = map;
1421 end = map + size;
1422
1423 for (p = map; p < end; p++)
1424 {
1425 if (*p == '\n')
1426 {
1427 if (p + 1 < end && p[1] == '\r')
1428 p++;
1429 }
1430 else if (*p == '\r')
1431 {
1432 if (p + 1 < end && p[1] == '\n')
1433 p++;
1434 }
1435 else
1436 continue;
1437
1438 /* End of line found. */
1439
1440 if (linemap == NULL || line_map_size < lineno + 1)
1441 {
1442 unsigned long newsize;
1443
1444 chars_per_line -= line_map_decrease;
1445 if (chars_per_line <= 1)
1446 chars_per_line = 1;
1447 line_map_size = size / chars_per_line + 1;
1448 if (line_map_size < lineno + 1)
1449 line_map_size = lineno + 1;
1450 newsize = line_map_size * sizeof (char *);
1451 linemap = (const char **) xrealloc (linemap, newsize);
1452 }
1453
1454 linemap[lineno++] = lstart;
1455 lstart = p + 1;
1456 }
1457
1458 *maxline = lineno;
1459 return linemap;
1460 }
1461
1462 /* Tries to open MODNAME, and if successful adds a node to print_files
1463 linked list and returns that node. Returns NULL on failure. */
1464
1465 static struct print_file_list *
1466 try_print_file_open (const char *origname, const char *modname, struct stat *fst)
1467 {
1468 struct print_file_list *p;
1469
1470 p = (struct print_file_list *) xmalloc (sizeof (struct print_file_list));
1471
1472 p->map = slurp_file (modname, &p->mapsize, fst);
1473 if (p->map == NULL)
1474 {
1475 free (p);
1476 return NULL;
1477 }
1478
1479 p->linemap = index_file (p->map, p->mapsize, &p->maxline);
1480 p->last_line = 0;
1481 p->max_printed = 0;
1482 p->filename = origname;
1483 p->modname = modname;
1484 p->next = print_files;
1485 p->first = 1;
1486 print_files = p;
1487 return p;
1488 }
1489
1490 /* If the source file, as described in the symtab, is not found
1491 try to locate it in one of the paths specified with -I
1492 If found, add location to print_files linked list. */
1493
1494 static struct print_file_list *
1495 update_source_path (const char *filename, bfd *abfd)
1496 {
1497 struct print_file_list *p;
1498 const char *fname;
1499 struct stat fst;
1500 int i;
1501
1502 p = try_print_file_open (filename, filename, &fst);
1503 if (p == NULL)
1504 {
1505 if (include_path_count == 0)
1506 return NULL;
1507
1508 /* Get the name of the file. */
1509 fname = lbasename (filename);
1510
1511 /* If file exists under a new path, we need to add it to the list
1512 so that show_line knows about it. */
1513 for (i = 0; i < include_path_count; i++)
1514 {
1515 char *modname = concat (include_paths[i], "/", fname,
1516 (const char *) 0);
1517
1518 p = try_print_file_open (filename, modname, &fst);
1519 if (p)
1520 break;
1521
1522 free (modname);
1523 }
1524 }
1525
1526 if (p != NULL)
1527 {
1528 long mtime = bfd_get_mtime (abfd);
1529
1530 if (fst.st_mtime > mtime)
1531 warn (_("source file %s is more recent than object file\n"),
1532 filename);
1533 }
1534
1535 return p;
1536 }
1537
1538 /* Print a source file line. */
1539
1540 static void
1541 print_line (struct print_file_list *p, unsigned int linenum)
1542 {
1543 const char *l;
1544 size_t len;
1545
1546 --linenum;
1547 if (linenum >= p->maxline)
1548 return;
1549 l = p->linemap [linenum];
1550 /* Test fwrite return value to quiet glibc warning. */
1551 len = strcspn (l, "\n\r");
1552 if (len == 0 || fwrite (l, len, 1, stdout) == 1)
1553 putchar ('\n');
1554 }
1555
1556 /* Print a range of source code lines. */
1557
1558 static void
1559 dump_lines (struct print_file_list *p, unsigned int start, unsigned int end)
1560 {
1561 if (p->map == NULL)
1562 return;
1563 while (start <= end)
1564 {
1565 print_line (p, start);
1566 start++;
1567 }
1568 }
1569
1570 /* Show the line number, or the source line, in a disassembly
1571 listing. */
1572
1573 static void
1574 show_line (bfd *abfd, asection *section, bfd_vma addr_offset)
1575 {
1576 const char *filename;
1577 const char *functionname;
1578 unsigned int linenumber;
1579 unsigned int discriminator;
1580 bfd_boolean reloc;
1581 char *path = NULL;
1582
1583 if (! with_line_numbers && ! with_source_code)
1584 return;
1585
1586 if (! bfd_find_nearest_line_discriminator (abfd, section, syms, addr_offset,
1587 &filename, &functionname,
1588 &linenumber, &discriminator))
1589 return;
1590
1591 if (filename != NULL && *filename == '\0')
1592 filename = NULL;
1593 if (functionname != NULL && *functionname == '\0')
1594 functionname = NULL;
1595
1596 if (filename
1597 && IS_ABSOLUTE_PATH (filename)
1598 && prefix)
1599 {
1600 char *path_up;
1601 const char *fname = filename;
1602
1603 path = xmalloc (prefix_length + PATH_MAX + 1);
1604
1605 if (prefix_length)
1606 memcpy (path, prefix, prefix_length);
1607 path_up = path + prefix_length;
1608
1609 /* Build relocated filename, stripping off leading directories
1610 from the initial filename if requested. */
1611 if (prefix_strip > 0)
1612 {
1613 int level = 0;
1614 const char *s;
1615
1616 /* Skip selected directory levels. */
1617 for (s = fname + 1; *s != '\0' && level < prefix_strip; s++)
1618 if (IS_DIR_SEPARATOR(*s))
1619 {
1620 fname = s;
1621 level++;
1622 }
1623 }
1624
1625 /* Update complete filename. */
1626 strncpy (path_up, fname, PATH_MAX);
1627 path_up[PATH_MAX] = '\0';
1628
1629 filename = path;
1630 reloc = TRUE;
1631 }
1632 else
1633 reloc = FALSE;
1634
1635 if (with_line_numbers)
1636 {
1637 if (functionname != NULL
1638 && (prev_functionname == NULL
1639 || strcmp (functionname, prev_functionname) != 0))
1640 {
1641 printf ("%s():\n", sanitize_string (functionname));
1642 prev_line = -1;
1643 }
1644 if (linenumber > 0
1645 && (linenumber != prev_line
1646 || discriminator != prev_discriminator))
1647 {
1648 if (discriminator > 0)
1649 printf ("%s:%u (discriminator %u)\n",
1650 filename == NULL ? "???" : sanitize_string (filename),
1651 linenumber, discriminator);
1652 else
1653 printf ("%s:%u\n", filename == NULL
1654 ? "???" : sanitize_string (filename),
1655 linenumber);
1656 }
1657 if (unwind_inlines)
1658 {
1659 const char *filename2;
1660 const char *functionname2;
1661 unsigned line2;
1662
1663 while (bfd_find_inliner_info (abfd, &filename2, &functionname2,
1664 &line2))
1665 {
1666 printf ("inlined by %s:%u",
1667 sanitize_string (filename2), line2);
1668 printf (" (%s)\n", sanitize_string (functionname2));
1669 }
1670 }
1671 }
1672
1673 if (with_source_code
1674 && filename != NULL
1675 && linenumber > 0)
1676 {
1677 struct print_file_list **pp, *p;
1678 unsigned l;
1679
1680 for (pp = &print_files; *pp != NULL; pp = &(*pp)->next)
1681 if (filename_cmp ((*pp)->filename, filename) == 0)
1682 break;
1683 p = *pp;
1684
1685 if (p == NULL)
1686 {
1687 if (reloc)
1688 filename = xstrdup (filename);
1689 p = update_source_path (filename, abfd);
1690 }
1691
1692 if (p != NULL && linenumber != p->last_line)
1693 {
1694 if (file_start_context && p->first)
1695 l = 1;
1696 else
1697 {
1698 l = linenumber - SHOW_PRECEDING_CONTEXT_LINES;
1699 if (l >= linenumber)
1700 l = 1;
1701 if (p->max_printed >= l)
1702 {
1703 if (p->max_printed < linenumber)
1704 l = p->max_printed + 1;
1705 else
1706 l = linenumber;
1707 }
1708 }
1709 dump_lines (p, l, linenumber);
1710 if (p->max_printed < linenumber)
1711 p->max_printed = linenumber;
1712 p->last_line = linenumber;
1713 p->first = 0;
1714 }
1715 }
1716
1717 if (functionname != NULL
1718 && (prev_functionname == NULL
1719 || strcmp (functionname, prev_functionname) != 0))
1720 {
1721 if (prev_functionname != NULL)
1722 free (prev_functionname);
1723 prev_functionname = (char *) xmalloc (strlen (functionname) + 1);
1724 strcpy (prev_functionname, functionname);
1725 }
1726
1727 if (linenumber > 0 && linenumber != prev_line)
1728 prev_line = linenumber;
1729
1730 if (discriminator != prev_discriminator)
1731 prev_discriminator = discriminator;
1732
1733 if (path)
1734 free (path);
1735 }
1736
1737 /* Pseudo FILE object for strings. */
1738 typedef struct
1739 {
1740 char *buffer;
1741 size_t pos;
1742 size_t alloc;
1743 } SFILE;
1744
1745 /* sprintf to a "stream". */
1746
1747 static int ATTRIBUTE_PRINTF_2
1748 objdump_sprintf (SFILE *f, const char *format, ...)
1749 {
1750 size_t n;
1751 va_list args;
1752
1753 while (1)
1754 {
1755 size_t space = f->alloc - f->pos;
1756
1757 va_start (args, format);
1758 n = vsnprintf (f->buffer + f->pos, space, format, args);
1759 va_end (args);
1760
1761 if (space > n)
1762 break;
1763
1764 f->alloc = (f->alloc + n) * 2;
1765 f->buffer = (char *) xrealloc (f->buffer, f->alloc);
1766 }
1767 f->pos += n;
1768
1769 return n;
1770 }
1771
1772 /* The number of zeroes we want to see before we start skipping them.
1773 The number is arbitrarily chosen. */
1774
1775 #define DEFAULT_SKIP_ZEROES 8
1776
1777 /* The number of zeroes to skip at the end of a section. If the
1778 number of zeroes at the end is between SKIP_ZEROES_AT_END and
1779 SKIP_ZEROES, they will be disassembled. If there are fewer than
1780 SKIP_ZEROES_AT_END, they will be skipped. This is a heuristic
1781 attempt to avoid disassembling zeroes inserted by section
1782 alignment. */
1783
1784 #define DEFAULT_SKIP_ZEROES_AT_END 3
1785
1786 /* Disassemble some data in memory between given values. */
1787
1788 static void
1789 disassemble_bytes (struct disassemble_info * inf,
1790 disassembler_ftype disassemble_fn,
1791 bfd_boolean insns,
1792 bfd_byte * data,
1793 bfd_vma start_offset,
1794 bfd_vma stop_offset,
1795 bfd_vma rel_offset,
1796 arelent *** relppp,
1797 arelent ** relppend)
1798 {
1799 struct objdump_disasm_info *aux;
1800 asection *section;
1801 int octets_per_line;
1802 int skip_addr_chars;
1803 bfd_vma addr_offset;
1804 unsigned int opb = inf->octets_per_byte;
1805 unsigned int skip_zeroes = inf->skip_zeroes;
1806 unsigned int skip_zeroes_at_end = inf->skip_zeroes_at_end;
1807 int octets = opb;
1808 SFILE sfile;
1809
1810 aux = (struct objdump_disasm_info *) inf->application_data;
1811 section = aux->sec;
1812
1813 sfile.alloc = 120;
1814 sfile.buffer = (char *) xmalloc (sfile.alloc);
1815 sfile.pos = 0;
1816
1817 if (insn_width)
1818 octets_per_line = insn_width;
1819 else if (insns)
1820 octets_per_line = 4;
1821 else
1822 octets_per_line = 16;
1823
1824 /* Figure out how many characters to skip at the start of an
1825 address, to make the disassembly look nicer. We discard leading
1826 zeroes in chunks of 4, ensuring that there is always a leading
1827 zero remaining. */
1828 skip_addr_chars = 0;
1829 if (! prefix_addresses)
1830 {
1831 char buf[30];
1832
1833 bfd_sprintf_vma (aux->abfd, buf, section->vma + section->size / opb);
1834
1835 while (buf[skip_addr_chars] == '0')
1836 ++skip_addr_chars;
1837
1838 /* Don't discard zeros on overflow. */
1839 if (buf[skip_addr_chars] == '\0' && section->vma != 0)
1840 skip_addr_chars = 0;
1841
1842 if (skip_addr_chars != 0)
1843 skip_addr_chars = (skip_addr_chars - 1) & -4;
1844 }
1845
1846 inf->insn_info_valid = 0;
1847
1848 addr_offset = start_offset;
1849 while (addr_offset < stop_offset)
1850 {
1851 bfd_vma z;
1852 bfd_boolean need_nl = FALSE;
1853 int previous_octets;
1854
1855 /* Remember the length of the previous instruction. */
1856 previous_octets = octets;
1857 octets = 0;
1858
1859 /* Make sure we don't use relocs from previous instructions. */
1860 aux->reloc = NULL;
1861
1862 /* If we see more than SKIP_ZEROES octets of zeroes, we just
1863 print `...'. */
1864 for (z = addr_offset * opb; z < stop_offset * opb; z++)
1865 if (data[z] != 0)
1866 break;
1867 if (! disassemble_zeroes
1868 && (inf->insn_info_valid == 0
1869 || inf->branch_delay_insns == 0)
1870 && (z - addr_offset * opb >= skip_zeroes
1871 || (z == stop_offset * opb &&
1872 z - addr_offset * opb < skip_zeroes_at_end)))
1873 {
1874 /* If there are more nonzero octets to follow, we only skip
1875 zeroes in multiples of 4, to try to avoid running over
1876 the start of an instruction which happens to start with
1877 zero. */
1878 if (z != stop_offset * opb)
1879 z = addr_offset * opb + ((z - addr_offset * opb) &~ 3);
1880
1881 octets = z - addr_offset * opb;
1882
1883 /* If we are going to display more data, and we are displaying
1884 file offsets, then tell the user how many zeroes we skip
1885 and the file offset from where we resume dumping. */
1886 if (display_file_offsets && ((addr_offset + (octets / opb)) < stop_offset))
1887 printf ("\t... (skipping %d zeroes, resuming at file offset: 0x%lx)\n",
1888 octets / opb,
1889 (unsigned long) (section->filepos
1890 + (addr_offset + (octets / opb))));
1891 else
1892 printf ("\t...\n");
1893 }
1894 else
1895 {
1896 char buf[50];
1897 int bpc = 0;
1898 int pb = 0;
1899
1900 if (with_line_numbers || with_source_code)
1901 show_line (aux->abfd, section, addr_offset);
1902
1903 if (! prefix_addresses)
1904 {
1905 char *s;
1906
1907 bfd_sprintf_vma (aux->abfd, buf, section->vma + addr_offset);
1908 for (s = buf + skip_addr_chars; *s == '0'; s++)
1909 *s = ' ';
1910 if (*s == '\0')
1911 *--s = '0';
1912 printf ("%s:\t", buf + skip_addr_chars);
1913 }
1914 else
1915 {
1916 aux->require_sec = TRUE;
1917 objdump_print_address (section->vma + addr_offset, inf);
1918 aux->require_sec = FALSE;
1919 putchar (' ');
1920 }
1921
1922 if (insns)
1923 {
1924 sfile.pos = 0;
1925 inf->fprintf_func = (fprintf_ftype) objdump_sprintf;
1926 inf->stream = &sfile;
1927 inf->bytes_per_line = 0;
1928 inf->bytes_per_chunk = 0;
1929 inf->flags = disassemble_all ? DISASSEMBLE_DATA : 0;
1930 if (machine)
1931 inf->flags |= USER_SPECIFIED_MACHINE_TYPE;
1932
1933 if (inf->disassembler_needs_relocs
1934 && (bfd_get_file_flags (aux->abfd) & EXEC_P) == 0
1935 && (bfd_get_file_flags (aux->abfd) & DYNAMIC) == 0
1936 && *relppp < relppend)
1937 {
1938 bfd_signed_vma distance_to_rel;
1939
1940 distance_to_rel = (**relppp)->address
1941 - (rel_offset + addr_offset);
1942
1943 /* Check to see if the current reloc is associated with
1944 the instruction that we are about to disassemble. */
1945 if (distance_to_rel == 0
1946 /* FIXME: This is wrong. We are trying to catch
1947 relocs that are addressed part way through the
1948 current instruction, as might happen with a packed
1949 VLIW instruction. Unfortunately we do not know the
1950 length of the current instruction since we have not
1951 disassembled it yet. Instead we take a guess based
1952 upon the length of the previous instruction. The
1953 proper solution is to have a new target-specific
1954 disassembler function which just returns the length
1955 of an instruction at a given address without trying
1956 to display its disassembly. */
1957 || (distance_to_rel > 0
1958 && distance_to_rel < (bfd_signed_vma) (previous_octets/ opb)))
1959 {
1960 inf->flags |= INSN_HAS_RELOC;
1961 aux->reloc = **relppp;
1962 }
1963 }
1964
1965 if (! disassemble_all
1966 && (section->flags & (SEC_CODE | SEC_HAS_CONTENTS))
1967 == (SEC_CODE | SEC_HAS_CONTENTS))
1968 /* Set a stop_vma so that the disassembler will not read
1969 beyond the next symbol. We assume that symbols appear on
1970 the boundaries between instructions. We only do this when
1971 disassembling code of course, and when -D is in effect. */
1972 inf->stop_vma = section->vma + stop_offset;
1973
1974 octets = (*disassemble_fn) (section->vma + addr_offset, inf);
1975
1976 inf->stop_vma = 0;
1977 inf->fprintf_func = (fprintf_ftype) fprintf;
1978 inf->stream = stdout;
1979 if (insn_width == 0 && inf->bytes_per_line != 0)
1980 octets_per_line = inf->bytes_per_line;
1981 if (octets < (int) opb)
1982 {
1983 if (sfile.pos)
1984 printf ("%s\n", sfile.buffer);
1985 if (octets >= 0)
1986 {
1987 non_fatal (_("disassemble_fn returned length %d"),
1988 octets);
1989 exit_status = 1;
1990 }
1991 break;
1992 }
1993 }
1994 else
1995 {
1996 bfd_vma j;
1997
1998 octets = octets_per_line;
1999 if (addr_offset + octets / opb > stop_offset)
2000 octets = (stop_offset - addr_offset) * opb;
2001
2002 for (j = addr_offset * opb; j < addr_offset * opb + octets; ++j)
2003 {
2004 if (ISPRINT (data[j]))
2005 buf[j - addr_offset * opb] = data[j];
2006 else
2007 buf[j - addr_offset * opb] = '.';
2008 }
2009 buf[j - addr_offset * opb] = '\0';
2010 }
2011
2012 if (prefix_addresses
2013 ? show_raw_insn > 0
2014 : show_raw_insn >= 0)
2015 {
2016 bfd_vma j;
2017
2018 /* If ! prefix_addresses and ! wide_output, we print
2019 octets_per_line octets per line. */
2020 pb = octets;
2021 if (pb > octets_per_line && ! prefix_addresses && ! wide_output)
2022 pb = octets_per_line;
2023
2024 if (inf->bytes_per_chunk)
2025 bpc = inf->bytes_per_chunk;
2026 else
2027 bpc = 1;
2028
2029 for (j = addr_offset * opb; j < addr_offset * opb + pb; j += bpc)
2030 {
2031 /* PR 21580: Check for a buffer ending early. */
2032 if (j + bpc <= stop_offset * opb)
2033 {
2034 int k;
2035
2036 if (inf->display_endian == BFD_ENDIAN_LITTLE)
2037 {
2038 for (k = bpc - 1; k >= 0; k--)
2039 printf ("%02x", (unsigned) data[j + k]);
2040 }
2041 else
2042 {
2043 for (k = 0; k < bpc; k++)
2044 printf ("%02x", (unsigned) data[j + k]);
2045 }
2046 }
2047 putchar (' ');
2048 }
2049
2050 for (; pb < octets_per_line; pb += bpc)
2051 {
2052 int k;
2053
2054 for (k = 0; k < bpc; k++)
2055 printf (" ");
2056 putchar (' ');
2057 }
2058
2059 /* Separate raw data from instruction by extra space. */
2060 if (insns)
2061 putchar ('\t');
2062 else
2063 printf (" ");
2064 }
2065
2066 if (! insns)
2067 printf ("%s", buf);
2068 else if (sfile.pos)
2069 printf ("%s", sfile.buffer);
2070
2071 if (prefix_addresses
2072 ? show_raw_insn > 0
2073 : show_raw_insn >= 0)
2074 {
2075 while (pb < octets)
2076 {
2077 bfd_vma j;
2078 char *s;
2079
2080 putchar ('\n');
2081 j = addr_offset * opb + pb;
2082
2083 bfd_sprintf_vma (aux->abfd, buf, section->vma + j / opb);
2084 for (s = buf + skip_addr_chars; *s == '0'; s++)
2085 *s = ' ';
2086 if (*s == '\0')
2087 *--s = '0';
2088 printf ("%s:\t", buf + skip_addr_chars);
2089
2090 pb += octets_per_line;
2091 if (pb > octets)
2092 pb = octets;
2093 for (; j < addr_offset * opb + pb; j += bpc)
2094 {
2095 /* PR 21619: Check for a buffer ending early. */
2096 if (j + bpc <= stop_offset * opb)
2097 {
2098 int k;
2099
2100 if (inf->display_endian == BFD_ENDIAN_LITTLE)
2101 {
2102 for (k = bpc - 1; k >= 0; k--)
2103 printf ("%02x", (unsigned) data[j + k]);
2104 }
2105 else
2106 {
2107 for (k = 0; k < bpc; k++)
2108 printf ("%02x", (unsigned) data[j + k]);
2109 }
2110 }
2111 putchar (' ');
2112 }
2113 }
2114 }
2115
2116 if (!wide_output)
2117 putchar ('\n');
2118 else
2119 need_nl = TRUE;
2120 }
2121
2122 while ((*relppp) < relppend
2123 && (**relppp)->address < rel_offset + addr_offset + octets / opb)
2124 {
2125 if (dump_reloc_info || dump_dynamic_reloc_info)
2126 {
2127 arelent *q;
2128
2129 q = **relppp;
2130
2131 if (wide_output)
2132 putchar ('\t');
2133 else
2134 printf ("\t\t\t");
2135
2136 objdump_print_value (section->vma - rel_offset + q->address,
2137 inf, TRUE);
2138
2139 if (q->howto == NULL)
2140 printf (": *unknown*\t");
2141 else if (q->howto->name)
2142 printf (": %s\t", q->howto->name);
2143 else
2144 printf (": %d\t", q->howto->type);
2145
2146 if (q->sym_ptr_ptr == NULL || *q->sym_ptr_ptr == NULL)
2147 printf ("*unknown*");
2148 else
2149 {
2150 const char *sym_name;
2151
2152 sym_name = bfd_asymbol_name (*q->sym_ptr_ptr);
2153 if (sym_name != NULL && *sym_name != '\0')
2154 objdump_print_symname (aux->abfd, inf, *q->sym_ptr_ptr);
2155 else
2156 {
2157 asection *sym_sec;
2158
2159 sym_sec = bfd_get_section (*q->sym_ptr_ptr);
2160 sym_name = bfd_get_section_name (aux->abfd, sym_sec);
2161 if (sym_name == NULL || *sym_name == '\0')
2162 sym_name = "*unknown*";
2163 printf ("%s", sanitize_string (sym_name));
2164 }
2165 }
2166
2167 if (q->addend)
2168 {
2169 bfd_signed_vma addend = q->addend;
2170 if (addend < 0)
2171 {
2172 printf ("-0x");
2173 addend = -addend;
2174 }
2175 else
2176 printf ("+0x");
2177 objdump_print_value (addend, inf, TRUE);
2178 }
2179
2180 printf ("\n");
2181 need_nl = FALSE;
2182 }
2183 ++(*relppp);
2184 }
2185
2186 if (need_nl)
2187 printf ("\n");
2188
2189 addr_offset += octets / opb;
2190 }
2191
2192 free (sfile.buffer);
2193 }
2194
2195 static void
2196 disassemble_section (bfd *abfd, asection *section, void *inf)
2197 {
2198 const struct elf_backend_data * bed;
2199 bfd_vma sign_adjust = 0;
2200 struct disassemble_info * pinfo = (struct disassemble_info *) inf;
2201 struct objdump_disasm_info * paux;
2202 unsigned int opb = pinfo->octets_per_byte;
2203 bfd_byte * data = NULL;
2204 bfd_size_type datasize = 0;
2205 arelent ** rel_pp = NULL;
2206 arelent ** rel_ppstart = NULL;
2207 arelent ** rel_ppend;
2208 bfd_vma stop_offset;
2209 asymbol * sym = NULL;
2210 long place = 0;
2211 long rel_count;
2212 bfd_vma rel_offset;
2213 unsigned long addr_offset;
2214
2215 /* Sections that do not contain machine
2216 code are not normally disassembled. */
2217 if (! disassemble_all
2218 && only_list == NULL
2219 && ((section->flags & (SEC_CODE | SEC_HAS_CONTENTS))
2220 != (SEC_CODE | SEC_HAS_CONTENTS)))
2221 return;
2222
2223 if (! process_section_p (section))
2224 return;
2225
2226 datasize = bfd_get_section_size (section);
2227 if (datasize == 0)
2228 return;
2229
2230 if (start_address == (bfd_vma) -1
2231 || start_address < section->vma)
2232 addr_offset = 0;
2233 else
2234 addr_offset = start_address - section->vma;
2235
2236 if (stop_address == (bfd_vma) -1)
2237 stop_offset = datasize / opb;
2238 else
2239 {
2240 if (stop_address < section->vma)
2241 stop_offset = 0;
2242 else
2243 stop_offset = stop_address - section->vma;
2244 if (stop_offset > datasize / opb)
2245 stop_offset = datasize / opb;
2246 }
2247
2248 if (addr_offset >= stop_offset)
2249 return;
2250
2251 /* Decide which set of relocs to use. Load them if necessary. */
2252 paux = (struct objdump_disasm_info *) pinfo->application_data;
2253 if (paux->dynrelbuf && dump_dynamic_reloc_info)
2254 {
2255 rel_pp = paux->dynrelbuf;
2256 rel_count = paux->dynrelcount;
2257 /* Dynamic reloc addresses are absolute, non-dynamic are section
2258 relative. REL_OFFSET specifies the reloc address corresponding
2259 to the start of this section. */
2260 rel_offset = section->vma;
2261 }
2262 else
2263 {
2264 rel_count = 0;
2265 rel_pp = NULL;
2266 rel_offset = 0;
2267
2268 if ((section->flags & SEC_RELOC) != 0
2269 && (dump_reloc_info || pinfo->disassembler_needs_relocs))
2270 {
2271 long relsize;
2272
2273 relsize = bfd_get_reloc_upper_bound (abfd, section);
2274 if (relsize < 0)
2275 bfd_fatal (bfd_get_filename (abfd));
2276
2277 if (relsize > 0)
2278 {
2279 rel_ppstart = rel_pp = (arelent **) xmalloc (relsize);
2280 rel_count = bfd_canonicalize_reloc (abfd, section, rel_pp, syms);
2281 if (rel_count < 0)
2282 bfd_fatal (bfd_get_filename (abfd));
2283
2284 /* Sort the relocs by address. */
2285 qsort (rel_pp, rel_count, sizeof (arelent *), compare_relocs);
2286 }
2287 }
2288 }
2289 rel_ppend = rel_pp + rel_count;
2290
2291 if (!bfd_malloc_and_get_section (abfd, section, &data))
2292 {
2293 non_fatal (_("Reading section %s failed because: %s"),
2294 section->name, bfd_errmsg (bfd_get_error ()));
2295 return;
2296 }
2297
2298 paux->sec = section;
2299 pinfo->buffer = data;
2300 pinfo->buffer_vma = section->vma;
2301 pinfo->buffer_length = datasize;
2302 pinfo->section = section;
2303
2304 /* Skip over the relocs belonging to addresses below the
2305 start address. */
2306 while (rel_pp < rel_ppend
2307 && (*rel_pp)->address < rel_offset + addr_offset)
2308 ++rel_pp;
2309
2310 printf (_("\nDisassembly of section %s:\n"), sanitize_string (section->name));
2311
2312 /* Find the nearest symbol forwards from our current position. */
2313 paux->require_sec = TRUE;
2314 sym = (asymbol *) find_symbol_for_address (section->vma + addr_offset,
2315 (struct disassemble_info *) inf,
2316 &place);
2317 paux->require_sec = FALSE;
2318
2319 /* PR 9774: If the target used signed addresses then we must make
2320 sure that we sign extend the value that we calculate for 'addr'
2321 in the loop below. */
2322 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
2323 && (bed = get_elf_backend_data (abfd)) != NULL
2324 && bed->sign_extend_vma)
2325 sign_adjust = (bfd_vma) 1 << (bed->s->arch_size - 1);
2326
2327 /* Disassemble a block of instructions up to the address associated with
2328 the symbol we have just found. Then print the symbol and find the
2329 next symbol on. Repeat until we have disassembled the entire section
2330 or we have reached the end of the address range we are interested in. */
2331 while (addr_offset < stop_offset)
2332 {
2333 bfd_vma addr;
2334 asymbol *nextsym;
2335 bfd_vma nextstop_offset;
2336 bfd_boolean insns;
2337 bfd_boolean do_print = TRUE;
2338
2339 addr = section->vma + addr_offset;
2340 addr = ((addr & ((sign_adjust << 1) - 1)) ^ sign_adjust) - sign_adjust;
2341
2342 if (sym != NULL && bfd_asymbol_value (sym) <= addr)
2343 {
2344 int x;
2345
2346 for (x = place;
2347 (x < sorted_symcount
2348 && (bfd_asymbol_value (sorted_syms[x]) <= addr));
2349 ++x)
2350 continue;
2351
2352 pinfo->symbols = sorted_syms + place;
2353 pinfo->num_symbols = x - place;
2354 pinfo->symtab_pos = place;
2355 }
2356 else
2357 {
2358 pinfo->symbols = NULL;
2359 pinfo->num_symbols = 0;
2360 pinfo->symtab_pos = -1;
2361 }
2362
2363 if (sym && paux->symbol)
2364 {
2365 const char *name = bfd_asymbol_name (sym);
2366 char *alloc = NULL;
2367
2368 if (do_demangle && name[0] != '\0')
2369 {
2370 /* Demangle the name. */
2371 alloc = bfd_demangle (abfd, name, demangle_flags);
2372 if (alloc != NULL)
2373 name = alloc;
2374 }
2375 do_print = streq (name, paux->symbol);
2376 free (alloc);
2377 }
2378
2379 if (! prefix_addresses && do_print)
2380 {
2381 pinfo->fprintf_func (pinfo->stream, "\n");
2382 objdump_print_addr_with_sym (abfd, section, sym, addr,
2383 pinfo, FALSE);
2384 pinfo->fprintf_func (pinfo->stream, ":\n");
2385 }
2386
2387 if (sym != NULL && bfd_asymbol_value (sym) > addr)
2388 nextsym = sym;
2389 else if (sym == NULL)
2390 nextsym = NULL;
2391 else
2392 {
2393 #define is_valid_next_sym(SYM) \
2394 ((SYM)->section == section \
2395 && (bfd_asymbol_value (SYM) > bfd_asymbol_value (sym)) \
2396 && pinfo->symbol_is_valid (SYM, pinfo))
2397
2398 /* Search forward for the next appropriate symbol in
2399 SECTION. Note that all the symbols are sorted
2400 together into one big array, and that some sections
2401 may have overlapping addresses. */
2402 while (place < sorted_symcount
2403 && ! is_valid_next_sym (sorted_syms [place]))
2404 ++place;
2405
2406 if (place >= sorted_symcount)
2407 nextsym = NULL;
2408 else
2409 nextsym = sorted_syms[place];
2410 }
2411
2412 if (sym != NULL && bfd_asymbol_value (sym) > addr)
2413 nextstop_offset = bfd_asymbol_value (sym) - section->vma;
2414 else if (nextsym == NULL)
2415 nextstop_offset = stop_offset;
2416 else
2417 nextstop_offset = bfd_asymbol_value (nextsym) - section->vma;
2418
2419 if (nextstop_offset > stop_offset
2420 || nextstop_offset <= addr_offset)
2421 nextstop_offset = stop_offset;
2422
2423 /* If a symbol is explicitly marked as being an object
2424 rather than a function, just dump the bytes without
2425 disassembling them. */
2426 if (disassemble_all
2427 || sym == NULL
2428 || sym->section != section
2429 || bfd_asymbol_value (sym) > addr
2430 || ((sym->flags & BSF_OBJECT) == 0
2431 && (strstr (bfd_asymbol_name (sym), "gnu_compiled")
2432 == NULL)
2433 && (strstr (bfd_asymbol_name (sym), "gcc2_compiled")
2434 == NULL))
2435 || (sym->flags & BSF_FUNCTION) != 0)
2436 insns = TRUE;
2437 else
2438 insns = FALSE;
2439
2440 if (do_print)
2441 {
2442 disassemble_bytes (pinfo, paux->disassemble_fn, insns, data,
2443 addr_offset, nextstop_offset,
2444 rel_offset, &rel_pp, rel_ppend);
2445 if (paux->symbol)
2446 break;
2447 }
2448
2449 addr_offset = nextstop_offset;
2450 sym = nextsym;
2451 }
2452
2453 free (data);
2454
2455 if (rel_ppstart != NULL)
2456 free (rel_ppstart);
2457 }
2458
2459 /* Disassemble the contents of an object file. */
2460
2461 static void
2462 disassemble_data (bfd *abfd)
2463 {
2464 struct disassemble_info disasm_info;
2465 struct objdump_disasm_info aux;
2466 long i;
2467
2468 print_files = NULL;
2469 prev_functionname = NULL;
2470 prev_line = -1;
2471 prev_discriminator = 0;
2472
2473 /* We make a copy of syms to sort. We don't want to sort syms
2474 because that will screw up the relocs. */
2475 sorted_symcount = symcount ? symcount : dynsymcount;
2476 sorted_syms = (asymbol **) xmalloc ((sorted_symcount + synthcount)
2477 * sizeof (asymbol *));
2478 memcpy (sorted_syms, symcount ? syms : dynsyms,
2479 sorted_symcount * sizeof (asymbol *));
2480
2481 sorted_symcount = remove_useless_symbols (sorted_syms, sorted_symcount);
2482
2483 for (i = 0; i < synthcount; ++i)
2484 {
2485 sorted_syms[sorted_symcount] = synthsyms + i;
2486 ++sorted_symcount;
2487 }
2488
2489 /* Sort the symbols into section and symbol order. */
2490 qsort (sorted_syms, sorted_symcount, sizeof (asymbol *), compare_symbols);
2491
2492 init_disassemble_info (&disasm_info, stdout, (fprintf_ftype) fprintf);
2493
2494 disasm_info.application_data = (void *) &aux;
2495 aux.abfd = abfd;
2496 aux.require_sec = FALSE;
2497 aux.dynrelbuf = NULL;
2498 aux.dynrelcount = 0;
2499 aux.reloc = NULL;
2500 aux.symbol = disasm_sym;
2501
2502 disasm_info.print_address_func = objdump_print_address;
2503 disasm_info.symbol_at_address_func = objdump_symbol_at_address;
2504
2505 if (machine != NULL)
2506 {
2507 const bfd_arch_info_type *inf = bfd_scan_arch (machine);
2508
2509 if (inf == NULL)
2510 fatal (_("can't use supplied machine %s"), machine);
2511
2512 abfd->arch_info = inf;
2513 }
2514
2515 if (endian != BFD_ENDIAN_UNKNOWN)
2516 {
2517 struct bfd_target *xvec;
2518
2519 xvec = (struct bfd_target *) xmalloc (sizeof (struct bfd_target));
2520 memcpy (xvec, abfd->xvec, sizeof (struct bfd_target));
2521 xvec->byteorder = endian;
2522 abfd->xvec = xvec;
2523 }
2524
2525 /* Use libopcodes to locate a suitable disassembler. */
2526 aux.disassemble_fn = disassembler (bfd_get_arch (abfd),
2527 bfd_big_endian (abfd),
2528 bfd_get_mach (abfd), abfd);
2529 if (!aux.disassemble_fn)
2530 {
2531 non_fatal (_("can't disassemble for architecture %s\n"),
2532 bfd_printable_arch_mach (bfd_get_arch (abfd), 0));
2533 exit_status = 1;
2534 return;
2535 }
2536
2537 disasm_info.flavour = bfd_get_flavour (abfd);
2538 disasm_info.arch = bfd_get_arch (abfd);
2539 disasm_info.mach = bfd_get_mach (abfd);
2540 disasm_info.disassembler_options = disassembler_options;
2541 disasm_info.octets_per_byte = bfd_octets_per_byte (abfd);
2542 disasm_info.skip_zeroes = DEFAULT_SKIP_ZEROES;
2543 disasm_info.skip_zeroes_at_end = DEFAULT_SKIP_ZEROES_AT_END;
2544 disasm_info.disassembler_needs_relocs = FALSE;
2545
2546 if (bfd_big_endian (abfd))
2547 disasm_info.display_endian = disasm_info.endian = BFD_ENDIAN_BIG;
2548 else if (bfd_little_endian (abfd))
2549 disasm_info.display_endian = disasm_info.endian = BFD_ENDIAN_LITTLE;
2550 else
2551 /* ??? Aborting here seems too drastic. We could default to big or little
2552 instead. */
2553 disasm_info.endian = BFD_ENDIAN_UNKNOWN;
2554
2555 /* Allow the target to customize the info structure. */
2556 disassemble_init_for_target (& disasm_info);
2557
2558 /* Pre-load the dynamic relocs as we may need them during the disassembly. */
2559 {
2560 long relsize = bfd_get_dynamic_reloc_upper_bound (abfd);
2561
2562 if (relsize < 0 && dump_dynamic_reloc_info)
2563 bfd_fatal (bfd_get_filename (abfd));
2564
2565 if (relsize > 0)
2566 {
2567 aux.dynrelbuf = (arelent **) xmalloc (relsize);
2568 aux.dynrelcount = bfd_canonicalize_dynamic_reloc (abfd,
2569 aux.dynrelbuf,
2570 dynsyms);
2571 if (aux.dynrelcount < 0)
2572 bfd_fatal (bfd_get_filename (abfd));
2573
2574 /* Sort the relocs by address. */
2575 qsort (aux.dynrelbuf, aux.dynrelcount, sizeof (arelent *),
2576 compare_relocs);
2577 }
2578 }
2579 disasm_info.symtab = sorted_syms;
2580 disasm_info.symtab_size = sorted_symcount;
2581
2582 bfd_map_over_sections (abfd, disassemble_section, & disasm_info);
2583
2584 if (aux.dynrelbuf != NULL)
2585 free (aux.dynrelbuf);
2586 free (sorted_syms);
2587 }
2588 \f
2589 static bfd_boolean
2590 load_specific_debug_section (enum dwarf_section_display_enum debug,
2591 asection *sec, void *file)
2592 {
2593 struct dwarf_section *section = &debug_displays [debug].section;
2594 bfd *abfd = (bfd *) file;
2595 bfd_byte *contents;
2596 bfd_size_type amt;
2597
2598 if (section->start != NULL)
2599 {
2600 /* If it is already loaded, do nothing. */
2601 if (streq (section->filename, bfd_get_filename (abfd)))
2602 return TRUE;
2603 free (section->start);
2604 }
2605
2606 section->filename = bfd_get_filename (abfd);
2607 section->reloc_info = NULL;
2608 section->num_relocs = 0;
2609 section->address = bfd_get_section_vma (abfd, sec);
2610 section->user_data = sec;
2611 section->size = bfd_get_section_size (sec);
2612 amt = section->size + 1;
2613 if (amt == 0 || amt > bfd_get_file_size (abfd))
2614 {
2615 section->start = NULL;
2616 free_debug_section (debug);
2617 printf (_("\nSection '%s' has an invalid size: %#llx.\n"),
2618 sanitize_string (section->name),
2619 (unsigned long long) section->size);
2620 return FALSE;
2621 }
2622 section->start = contents = malloc (amt);
2623 if (section->start == NULL
2624 || !bfd_get_full_section_contents (abfd, sec, &contents))
2625 {
2626 free_debug_section (debug);
2627 printf (_("\nCan't get contents for section '%s'.\n"),
2628 sanitize_string (section->name));
2629 return FALSE;
2630 }
2631 /* Ensure any string section has a terminating NUL. */
2632 section->start[section->size] = 0;
2633
2634 if (is_relocatable && debug_displays [debug].relocate)
2635 {
2636 long reloc_size;
2637 bfd_boolean ret;
2638
2639 bfd_cache_section_contents (sec, section->start);
2640
2641 ret = bfd_simple_get_relocated_section_contents (abfd,
2642 sec,
2643 section->start,
2644 syms) != NULL;
2645
2646 if (! ret)
2647 {
2648 free_debug_section (debug);
2649 printf (_("\nCan't get contents for section '%s'.\n"),
2650 sanitize_string (section->name));
2651 return FALSE;
2652 }
2653
2654 reloc_size = bfd_get_reloc_upper_bound (abfd, sec);
2655 if (reloc_size > 0)
2656 {
2657 unsigned long reloc_count;
2658 arelent **relocs;
2659
2660 relocs = (arelent **) xmalloc (reloc_size);
2661
2662 reloc_count = bfd_canonicalize_reloc (abfd, sec, relocs, NULL);
2663 if (reloc_count == 0)
2664 free (relocs);
2665 else
2666 {
2667 section->reloc_info = relocs;
2668 section->num_relocs = reloc_count;
2669 }
2670 }
2671 }
2672
2673 return TRUE;
2674 }
2675
2676 bfd_boolean
2677 reloc_at (struct dwarf_section * dsec, dwarf_vma offset)
2678 {
2679 arelent ** relocs;
2680 arelent * rp;
2681
2682 if (dsec == NULL || dsec->reloc_info == NULL)
2683 return FALSE;
2684
2685 relocs = (arelent **) dsec->reloc_info;
2686
2687 for (; (rp = * relocs) != NULL; ++ relocs)
2688 if (rp->address == offset)
2689 return TRUE;
2690
2691 return FALSE;
2692 }
2693
2694 bfd_boolean
2695 load_debug_section (enum dwarf_section_display_enum debug, void *file)
2696 {
2697 struct dwarf_section *section = &debug_displays [debug].section;
2698 bfd *abfd = (bfd *) file;
2699 asection *sec;
2700
2701 /* If it is already loaded, do nothing. */
2702 if (section->start != NULL)
2703 {
2704 if (streq (section->filename, bfd_get_filename (abfd)))
2705 return TRUE;
2706 }
2707
2708 /* Locate the debug section. */
2709 sec = bfd_get_section_by_name (abfd, section->uncompressed_name);
2710 if (sec != NULL)
2711 section->name = section->uncompressed_name;
2712 else
2713 {
2714 sec = bfd_get_section_by_name (abfd, section->compressed_name);
2715 if (sec != NULL)
2716 section->name = section->compressed_name;
2717 }
2718 if (sec == NULL)
2719 return FALSE;
2720
2721 return load_specific_debug_section (debug, sec, file);
2722 }
2723
2724 void
2725 free_debug_section (enum dwarf_section_display_enum debug)
2726 {
2727 struct dwarf_section *section = &debug_displays [debug].section;
2728
2729 if (section->start == NULL)
2730 return;
2731
2732 /* PR 17512: file: 0f67f69d. */
2733 if (section->user_data != NULL)
2734 {
2735 asection * sec = (asection *) section->user_data;
2736
2737 /* If we are freeing contents that are also pointed to by the BFD
2738 library's section structure then make sure to update those pointers
2739 too. Otherwise, the next time we try to load data for this section
2740 we can end up using a stale pointer. */
2741 if (section->start == sec->contents)
2742 {
2743 sec->contents = NULL;
2744 sec->flags &= ~ SEC_IN_MEMORY;
2745 sec->compress_status = COMPRESS_SECTION_NONE;
2746 }
2747 }
2748
2749 free ((char *) section->start);
2750 section->start = NULL;
2751 section->address = 0;
2752 section->size = 0;
2753 }
2754
2755 void
2756 close_debug_file (void * file)
2757 {
2758 bfd * abfd = (bfd *) file;
2759
2760 bfd_close (abfd);
2761 }
2762
2763 void *
2764 open_debug_file (const char * pathname)
2765 {
2766 bfd * data;
2767
2768 data = bfd_openr (pathname, NULL);
2769 if (data == NULL)
2770 return NULL;
2771
2772 if (! bfd_check_format (data, bfd_object))
2773 return NULL;
2774
2775 return data;
2776 }
2777
2778 static void
2779 dump_dwarf_section (bfd *abfd, asection *section,
2780 void *arg ATTRIBUTE_UNUSED)
2781 {
2782 const char *name = bfd_get_section_name (abfd, section);
2783 const char *match;
2784 int i;
2785
2786 if (CONST_STRNEQ (name, ".gnu.linkonce.wi."))
2787 match = ".debug_info";
2788 else
2789 match = name;
2790
2791 for (i = 0; i < max; i++)
2792 if ((strcmp (debug_displays [i].section.uncompressed_name, match) == 0
2793 || strcmp (debug_displays [i].section.compressed_name, match) == 0)
2794 && debug_displays [i].enabled != NULL
2795 && *debug_displays [i].enabled)
2796 {
2797 struct dwarf_section *sec = &debug_displays [i].section;
2798
2799 if (strcmp (sec->uncompressed_name, match) == 0)
2800 sec->name = sec->uncompressed_name;
2801 else
2802 sec->name = sec->compressed_name;
2803 if (load_specific_debug_section ((enum dwarf_section_display_enum) i,
2804 section, abfd))
2805 {
2806 debug_displays [i].display (sec, abfd);
2807
2808 if (i != info && i != abbrev)
2809 free_debug_section ((enum dwarf_section_display_enum) i);
2810 }
2811 break;
2812 }
2813 }
2814
2815 /* Dump the dwarf debugging information. */
2816
2817 static void
2818 dump_dwarf (bfd *abfd)
2819 {
2820 bfd * separates;
2821
2822 is_relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
2823
2824 eh_addr_size = bfd_arch_bits_per_address (abfd) / 8;
2825
2826 if (bfd_big_endian (abfd))
2827 byte_get = byte_get_big_endian;
2828 else if (bfd_little_endian (abfd))
2829 byte_get = byte_get_little_endian;
2830 else
2831 /* PR 17512: file: objdump-s-endless-loop.tekhex. */
2832 {
2833 warn (_("File %s does not contain any dwarf debug information\n"),
2834 bfd_get_filename (abfd));
2835 return;
2836 }
2837
2838 switch (bfd_get_arch (abfd))
2839 {
2840 case bfd_arch_i386:
2841 switch (bfd_get_mach (abfd))
2842 {
2843 case bfd_mach_x86_64:
2844 case bfd_mach_x86_64_intel_syntax:
2845 case bfd_mach_x86_64_nacl:
2846 case bfd_mach_x64_32:
2847 case bfd_mach_x64_32_intel_syntax:
2848 case bfd_mach_x64_32_nacl:
2849 init_dwarf_regnames_x86_64 ();
2850 break;
2851
2852 default:
2853 init_dwarf_regnames_i386 ();
2854 break;
2855 }
2856 break;
2857
2858 case bfd_arch_iamcu:
2859 init_dwarf_regnames_iamcu ();
2860 break;
2861
2862 case bfd_arch_aarch64:
2863 init_dwarf_regnames_aarch64();
2864 break;
2865
2866 case bfd_arch_s390:
2867 init_dwarf_regnames_s390 ();
2868 break;
2869
2870 case bfd_arch_riscv:
2871 init_dwarf_regnames_riscv ();
2872 break;
2873
2874 case bfd_arch_s12z:
2875 /* S12Z has a 24 bit address space. But the only known
2876 producer of dwarf_info encodes addresses into 32 bits. */
2877 eh_addr_size = 4;
2878 break;
2879
2880 default:
2881 break;
2882 }
2883
2884 separates = load_separate_debug_file (abfd, bfd_get_filename (abfd));
2885
2886 bfd_map_over_sections (abfd, dump_dwarf_section, NULL);
2887
2888 if (separates)
2889 bfd_map_over_sections (separates, dump_dwarf_section, NULL);
2890
2891 free_debug_memory ();
2892 }
2893 \f
2894 /* Read ABFD's stabs section STABSECT_NAME, and return a pointer to
2895 it. Return NULL on failure. */
2896
2897 static bfd_byte *
2898 read_section_stabs (bfd *abfd, const char *sect_name, bfd_size_type *size_ptr)
2899 {
2900 asection *stabsect;
2901 bfd_byte *contents;
2902
2903 stabsect = bfd_get_section_by_name (abfd, sect_name);
2904 if (stabsect == NULL)
2905 {
2906 printf (_("No %s section present\n\n"),
2907 sanitize_string (sect_name));
2908 return FALSE;
2909 }
2910
2911 if (!bfd_malloc_and_get_section (abfd, stabsect, &contents))
2912 {
2913 non_fatal (_("reading %s section of %s failed: %s"),
2914 sect_name, bfd_get_filename (abfd),
2915 bfd_errmsg (bfd_get_error ()));
2916 exit_status = 1;
2917 free (contents);
2918 return NULL;
2919 }
2920
2921 *size_ptr = bfd_section_size (abfd, stabsect);
2922
2923 return contents;
2924 }
2925
2926 /* Stabs entries use a 12 byte format:
2927 4 byte string table index
2928 1 byte stab type
2929 1 byte stab other field
2930 2 byte stab desc field
2931 4 byte stab value
2932 FIXME: This will have to change for a 64 bit object format. */
2933
2934 #define STRDXOFF (0)
2935 #define TYPEOFF (4)
2936 #define OTHEROFF (5)
2937 #define DESCOFF (6)
2938 #define VALOFF (8)
2939 #define STABSIZE (12)
2940
2941 /* Print ABFD's stabs section STABSECT_NAME (in `stabs'),
2942 using string table section STRSECT_NAME (in `strtab'). */
2943
2944 static void
2945 print_section_stabs (bfd *abfd,
2946 const char *stabsect_name,
2947 unsigned *string_offset_ptr)
2948 {
2949 int i;
2950 unsigned file_string_table_offset = 0;
2951 unsigned next_file_string_table_offset = *string_offset_ptr;
2952 bfd_byte *stabp, *stabs_end;
2953
2954 stabp = stabs;
2955 stabs_end = stabp + stab_size;
2956
2957 printf (_("Contents of %s section:\n\n"), sanitize_string (stabsect_name));
2958 printf ("Symnum n_type n_othr n_desc n_value n_strx String\n");
2959
2960 /* Loop through all symbols and print them.
2961
2962 We start the index at -1 because there is a dummy symbol on
2963 the front of stabs-in-{coff,elf} sections that supplies sizes. */
2964 for (i = -1; stabp <= stabs_end - STABSIZE; stabp += STABSIZE, i++)
2965 {
2966 const char *name;
2967 unsigned long strx;
2968 unsigned char type, other;
2969 unsigned short desc;
2970 bfd_vma value;
2971
2972 strx = bfd_h_get_32 (abfd, stabp + STRDXOFF);
2973 type = bfd_h_get_8 (abfd, stabp + TYPEOFF);
2974 other = bfd_h_get_8 (abfd, stabp + OTHEROFF);
2975 desc = bfd_h_get_16 (abfd, stabp + DESCOFF);
2976 value = bfd_h_get_32 (abfd, stabp + VALOFF);
2977
2978 printf ("\n%-6d ", i);
2979 /* Either print the stab name, or, if unnamed, print its number
2980 again (makes consistent formatting for tools like awk). */
2981 name = bfd_get_stab_name (type);
2982 if (name != NULL)
2983 printf ("%-6s", sanitize_string (name));
2984 else if (type == N_UNDF)
2985 printf ("HdrSym");
2986 else
2987 printf ("%-6d", type);
2988 printf (" %-6d %-6d ", other, desc);
2989 bfd_printf_vma (abfd, value);
2990 printf (" %-6lu", strx);
2991
2992 /* Symbols with type == 0 (N_UNDF) specify the length of the
2993 string table associated with this file. We use that info
2994 to know how to relocate the *next* file's string table indices. */
2995 if (type == N_UNDF)
2996 {
2997 file_string_table_offset = next_file_string_table_offset;
2998 next_file_string_table_offset += value;
2999 }
3000 else
3001 {
3002 bfd_size_type amt = strx + file_string_table_offset;
3003
3004 /* Using the (possibly updated) string table offset, print the
3005 string (if any) associated with this symbol. */
3006 if (amt < stabstr_size)
3007 /* PR 17512: file: 079-79389-0.001:0.1.
3008 FIXME: May need to sanitize this string before displaying. */
3009 printf (" %.*s", (int)(stabstr_size - amt), strtab + amt);
3010 else
3011 printf (" *");
3012 }
3013 }
3014 printf ("\n\n");
3015 *string_offset_ptr = next_file_string_table_offset;
3016 }
3017
3018 typedef struct
3019 {
3020 const char * section_name;
3021 const char * string_section_name;
3022 unsigned string_offset;
3023 }
3024 stab_section_names;
3025
3026 static void
3027 find_stabs_section (bfd *abfd, asection *section, void *names)
3028 {
3029 int len;
3030 stab_section_names * sought = (stab_section_names *) names;
3031
3032 /* Check for section names for which stabsect_name is a prefix, to
3033 handle .stab.N, etc. */
3034 len = strlen (sought->section_name);
3035
3036 /* If the prefix matches, and the files section name ends with a
3037 nul or a digit, then we match. I.e., we want either an exact
3038 match or a section followed by a number. */
3039 if (strncmp (sought->section_name, section->name, len) == 0
3040 && (section->name[len] == 0
3041 || (section->name[len] == '.' && ISDIGIT (section->name[len + 1]))))
3042 {
3043 if (strtab == NULL)
3044 strtab = read_section_stabs (abfd, sought->string_section_name,
3045 &stabstr_size);
3046
3047 if (strtab)
3048 {
3049 stabs = read_section_stabs (abfd, section->name, &stab_size);
3050 if (stabs)
3051 print_section_stabs (abfd, section->name, &sought->string_offset);
3052 }
3053 }
3054 }
3055
3056 static void
3057 dump_stabs_section (bfd *abfd, char *stabsect_name, char *strsect_name)
3058 {
3059 stab_section_names s;
3060
3061 s.section_name = stabsect_name;
3062 s.string_section_name = strsect_name;
3063 s.string_offset = 0;
3064
3065 bfd_map_over_sections (abfd, find_stabs_section, & s);
3066
3067 free (strtab);
3068 strtab = NULL;
3069 }
3070
3071 /* Dump the any sections containing stabs debugging information. */
3072
3073 static void
3074 dump_stabs (bfd *abfd)
3075 {
3076 dump_stabs_section (abfd, ".stab", ".stabstr");
3077 dump_stabs_section (abfd, ".stab.excl", ".stab.exclstr");
3078 dump_stabs_section (abfd, ".stab.index", ".stab.indexstr");
3079
3080 /* For Darwin. */
3081 dump_stabs_section (abfd, "LC_SYMTAB.stabs", "LC_SYMTAB.stabstr");
3082
3083 dump_stabs_section (abfd, "$GDB_SYMBOLS$", "$GDB_STRINGS$");
3084 }
3085 \f
3086 static void
3087 dump_bfd_header (bfd *abfd)
3088 {
3089 char *comma = "";
3090
3091 printf (_("architecture: %s, "),
3092 bfd_printable_arch_mach (bfd_get_arch (abfd),
3093 bfd_get_mach (abfd)));
3094 printf (_("flags 0x%08x:\n"), abfd->flags & ~BFD_FLAGS_FOR_BFD_USE_MASK);
3095
3096 #define PF(x, y) if (abfd->flags & x) {printf("%s%s", comma, y); comma=", ";}
3097 PF (HAS_RELOC, "HAS_RELOC");
3098 PF (EXEC_P, "EXEC_P");
3099 PF (HAS_LINENO, "HAS_LINENO");
3100 PF (HAS_DEBUG, "HAS_DEBUG");
3101 PF (HAS_SYMS, "HAS_SYMS");
3102 PF (HAS_LOCALS, "HAS_LOCALS");
3103 PF (DYNAMIC, "DYNAMIC");
3104 PF (WP_TEXT, "WP_TEXT");
3105 PF (D_PAGED, "D_PAGED");
3106 PF (BFD_IS_RELAXABLE, "BFD_IS_RELAXABLE");
3107 printf (_("\nstart address 0x"));
3108 bfd_printf_vma (abfd, abfd->start_address);
3109 printf ("\n");
3110 }
3111
3112 \f
3113 static void
3114 dump_bfd_private_header (bfd *abfd)
3115 {
3116 bfd_print_private_bfd_data (abfd, stdout);
3117 }
3118
3119 static void
3120 dump_target_specific (bfd *abfd)
3121 {
3122 const struct objdump_private_desc * const *desc;
3123 struct objdump_private_option *opt;
3124 char *e, *b;
3125
3126 /* Find the desc. */
3127 for (desc = objdump_private_vectors; *desc != NULL; desc++)
3128 if ((*desc)->filter (abfd))
3129 break;
3130
3131 if (*desc == NULL)
3132 {
3133 non_fatal (_("option -P/--private not supported by this file"));
3134 return;
3135 }
3136
3137 /* Clear all options. */
3138 for (opt = (*desc)->options; opt->name; opt++)
3139 opt->selected = FALSE;
3140
3141 /* Decode options. */
3142 b = dump_private_options;
3143 do
3144 {
3145 e = strchr (b, ',');
3146
3147 if (e)
3148 *e = 0;
3149
3150 for (opt = (*desc)->options; opt->name; opt++)
3151 if (strcmp (opt->name, b) == 0)
3152 {
3153 opt->selected = TRUE;
3154 break;
3155 }
3156 if (opt->name == NULL)
3157 non_fatal (_("target specific dump '%s' not supported"), b);
3158
3159 if (e)
3160 {
3161 *e = ',';
3162 b = e + 1;
3163 }
3164 }
3165 while (e != NULL);
3166
3167 /* Dump. */
3168 (*desc)->dump (abfd);
3169 }
3170 \f
3171 /* Display a section in hexadecimal format with associated characters.
3172 Each line prefixed by the zero padded address. */
3173
3174 static void
3175 dump_section (bfd *abfd, asection *section, void *dummy ATTRIBUTE_UNUSED)
3176 {
3177 bfd_byte *data = NULL;
3178 bfd_size_type datasize;
3179 bfd_vma addr_offset;
3180 bfd_vma start_offset;
3181 bfd_vma stop_offset;
3182 unsigned int opb = bfd_octets_per_byte (abfd);
3183 /* Bytes per line. */
3184 const int onaline = 16;
3185 char buf[64];
3186 int count;
3187 int width;
3188
3189 if ((section->flags & SEC_HAS_CONTENTS) == 0)
3190 return;
3191
3192 if (! process_section_p (section))
3193 return;
3194
3195 if ((datasize = bfd_section_size (abfd, section)) == 0)
3196 return;
3197
3198 /* Compute the address range to display. */
3199 if (start_address == (bfd_vma) -1
3200 || start_address < section->vma)
3201 start_offset = 0;
3202 else
3203 start_offset = start_address - section->vma;
3204
3205 if (stop_address == (bfd_vma) -1)
3206 stop_offset = datasize / opb;
3207 else
3208 {
3209 if (stop_address < section->vma)
3210 stop_offset = 0;
3211 else
3212 stop_offset = stop_address - section->vma;
3213
3214 if (stop_offset > datasize / opb)
3215 stop_offset = datasize / opb;
3216 }
3217
3218 if (start_offset >= stop_offset)
3219 return;
3220
3221 printf (_("Contents of section %s:"), sanitize_string (section->name));
3222 if (display_file_offsets)
3223 printf (_(" (Starting at file offset: 0x%lx)"),
3224 (unsigned long) (section->filepos + start_offset));
3225 printf ("\n");
3226
3227 if (!bfd_get_full_section_contents (abfd, section, &data))
3228 {
3229 non_fatal (_("Reading section %s failed because: %s"),
3230 section->name, bfd_errmsg (bfd_get_error ()));
3231 return;
3232 }
3233
3234 width = 4;
3235
3236 bfd_sprintf_vma (abfd, buf, start_offset + section->vma);
3237 if (strlen (buf) >= sizeof (buf))
3238 abort ();
3239
3240 count = 0;
3241 while (buf[count] == '0' && buf[count+1] != '\0')
3242 count++;
3243 count = strlen (buf) - count;
3244 if (count > width)
3245 width = count;
3246
3247 bfd_sprintf_vma (abfd, buf, stop_offset + section->vma - 1);
3248 if (strlen (buf) >= sizeof (buf))
3249 abort ();
3250
3251 count = 0;
3252 while (buf[count] == '0' && buf[count+1] != '\0')
3253 count++;
3254 count = strlen (buf) - count;
3255 if (count > width)
3256 width = count;
3257
3258 for (addr_offset = start_offset;
3259 addr_offset < stop_offset; addr_offset += onaline / opb)
3260 {
3261 bfd_size_type j;
3262
3263 bfd_sprintf_vma (abfd, buf, (addr_offset + section->vma));
3264 count = strlen (buf);
3265 if ((size_t) count >= sizeof (buf))
3266 abort ();
3267
3268 putchar (' ');
3269 while (count < width)
3270 {
3271 putchar ('0');
3272 count++;
3273 }
3274 fputs (buf + count - width, stdout);
3275 putchar (' ');
3276
3277 for (j = addr_offset * opb;
3278 j < addr_offset * opb + onaline; j++)
3279 {
3280 if (j < stop_offset * opb)
3281 printf ("%02x", (unsigned) (data[j]));
3282 else
3283 printf (" ");
3284 if ((j & 3) == 3)
3285 printf (" ");
3286 }
3287
3288 printf (" ");
3289 for (j = addr_offset * opb;
3290 j < addr_offset * opb + onaline; j++)
3291 {
3292 if (j >= stop_offset * opb)
3293 printf (" ");
3294 else
3295 printf ("%c", ISPRINT (data[j]) ? data[j] : '.');
3296 }
3297 putchar ('\n');
3298 }
3299 free (data);
3300 }
3301
3302 /* Actually display the various requested regions. */
3303
3304 static void
3305 dump_data (bfd *abfd)
3306 {
3307 bfd_map_over_sections (abfd, dump_section, NULL);
3308 }
3309
3310 /* Should perhaps share code and display with nm? */
3311
3312 static void
3313 dump_symbols (bfd *abfd ATTRIBUTE_UNUSED, bfd_boolean dynamic)
3314 {
3315 asymbol **current;
3316 long max_count;
3317 long count;
3318
3319 if (dynamic)
3320 {
3321 current = dynsyms;
3322 max_count = dynsymcount;
3323 printf ("DYNAMIC SYMBOL TABLE:\n");
3324 }
3325 else
3326 {
3327 current = syms;
3328 max_count = symcount;
3329 printf ("SYMBOL TABLE:\n");
3330 }
3331
3332 if (max_count == 0)
3333 printf (_("no symbols\n"));
3334
3335 for (count = 0; count < max_count; count++)
3336 {
3337 bfd *cur_bfd;
3338
3339 if (*current == NULL)
3340 printf (_("no information for symbol number %ld\n"), count);
3341
3342 else if ((cur_bfd = bfd_asymbol_bfd (*current)) == NULL)
3343 printf (_("could not determine the type of symbol number %ld\n"),
3344 count);
3345
3346 else if (process_section_p ((* current)->section)
3347 && (dump_special_syms
3348 || !bfd_is_target_special_symbol (cur_bfd, *current)))
3349 {
3350 const char *name = (*current)->name;
3351
3352 if (do_demangle && name != NULL && *name != '\0')
3353 {
3354 char *alloc;
3355
3356 /* If we want to demangle the name, we demangle it
3357 here, and temporarily clobber it while calling
3358 bfd_print_symbol. FIXME: This is a gross hack. */
3359 alloc = bfd_demangle (cur_bfd, name, demangle_flags);
3360 if (alloc != NULL)
3361 (*current)->name = alloc;
3362 bfd_print_symbol (cur_bfd, stdout, *current,
3363 bfd_print_symbol_all);
3364 if (alloc != NULL)
3365 {
3366 (*current)->name = name;
3367 free (alloc);
3368 }
3369 }
3370 else
3371 bfd_print_symbol (cur_bfd, stdout, *current,
3372 bfd_print_symbol_all);
3373 printf ("\n");
3374 }
3375
3376 current++;
3377 }
3378 printf ("\n\n");
3379 }
3380 \f
3381 static void
3382 dump_reloc_set (bfd *abfd, asection *sec, arelent **relpp, long relcount)
3383 {
3384 arelent **p;
3385 char *last_filename, *last_functionname;
3386 unsigned int last_line;
3387 unsigned int last_discriminator;
3388
3389 /* Get column headers lined up reasonably. */
3390 {
3391 static int width;
3392
3393 if (width == 0)
3394 {
3395 char buf[30];
3396
3397 bfd_sprintf_vma (abfd, buf, (bfd_vma) -1);
3398 width = strlen (buf) - 7;
3399 }
3400 printf ("OFFSET %*s TYPE %*s VALUE \n", width, "", 12, "");
3401 }
3402
3403 last_filename = NULL;
3404 last_functionname = NULL;
3405 last_line = 0;
3406 last_discriminator = 0;
3407
3408 for (p = relpp; relcount && *p != NULL; p++, relcount--)
3409 {
3410 arelent *q = *p;
3411 const char *filename, *functionname;
3412 unsigned int linenumber;
3413 unsigned int discriminator;
3414 const char *sym_name;
3415 const char *section_name;
3416 bfd_vma addend2 = 0;
3417
3418 if (start_address != (bfd_vma) -1
3419 && q->address < start_address)
3420 continue;
3421 if (stop_address != (bfd_vma) -1
3422 && q->address > stop_address)
3423 continue;
3424
3425 if (with_line_numbers
3426 && sec != NULL
3427 && bfd_find_nearest_line_discriminator (abfd, sec, syms, q->address,
3428 &filename, &functionname,
3429 &linenumber, &discriminator))
3430 {
3431 if (functionname != NULL
3432 && (last_functionname == NULL
3433 || strcmp (functionname, last_functionname) != 0))
3434 {
3435 printf ("%s():\n", sanitize_string (functionname));
3436 if (last_functionname != NULL)
3437 free (last_functionname);
3438 last_functionname = xstrdup (functionname);
3439 }
3440
3441 if (linenumber > 0
3442 && (linenumber != last_line
3443 || (filename != NULL
3444 && last_filename != NULL
3445 && filename_cmp (filename, last_filename) != 0)
3446 || (discriminator != last_discriminator)))
3447 {
3448 if (discriminator > 0)
3449 printf ("%s:%u\n", filename == NULL ? "???" :
3450 sanitize_string (filename), linenumber);
3451 else
3452 printf ("%s:%u (discriminator %u)\n",
3453 filename == NULL ? "???" : sanitize_string (filename),
3454 linenumber, discriminator);
3455 last_line = linenumber;
3456 last_discriminator = discriminator;
3457 if (last_filename != NULL)
3458 free (last_filename);
3459 if (filename == NULL)
3460 last_filename = NULL;
3461 else
3462 last_filename = xstrdup (filename);
3463 }
3464 }
3465
3466 if (q->sym_ptr_ptr && *q->sym_ptr_ptr)
3467 {
3468 sym_name = (*(q->sym_ptr_ptr))->name;
3469 section_name = (*(q->sym_ptr_ptr))->section->name;
3470 }
3471 else
3472 {
3473 sym_name = NULL;
3474 section_name = NULL;
3475 }
3476
3477 bfd_printf_vma (abfd, q->address);
3478 if (q->howto == NULL)
3479 printf (" *unknown* ");
3480 else if (q->howto->name)
3481 {
3482 const char *name = q->howto->name;
3483
3484 /* R_SPARC_OLO10 relocations contain two addends.
3485 But because 'arelent' lacks enough storage to
3486 store them both, the 64-bit ELF Sparc backend
3487 records this as two relocations. One R_SPARC_LO10
3488 and one R_SPARC_13, both pointing to the same
3489 address. This is merely so that we have some
3490 place to store both addend fields.
3491
3492 Undo this transformation, otherwise the output
3493 will be confusing. */
3494 if (abfd->xvec->flavour == bfd_target_elf_flavour
3495 && elf_tdata(abfd)->elf_header->e_machine == EM_SPARCV9
3496 && relcount > 1
3497 && !strcmp (q->howto->name, "R_SPARC_LO10"))
3498 {
3499 arelent *q2 = *(p + 1);
3500 if (q2 != NULL
3501 && q2->howto
3502 && q->address == q2->address
3503 && !strcmp (q2->howto->name, "R_SPARC_13"))
3504 {
3505 name = "R_SPARC_OLO10";
3506 addend2 = q2->addend;
3507 p++;
3508 }
3509 }
3510 printf (" %-16s ", name);
3511 }
3512 else
3513 printf (" %-16d ", q->howto->type);
3514
3515 if (sym_name)
3516 {
3517 objdump_print_symname (abfd, NULL, *q->sym_ptr_ptr);
3518 }
3519 else
3520 {
3521 if (section_name == NULL)
3522 section_name = "*unknown*";
3523 printf ("[%s]", sanitize_string (section_name));
3524 }
3525
3526 if (q->addend)
3527 {
3528 bfd_signed_vma addend = q->addend;
3529 if (addend < 0)
3530 {
3531 printf ("-0x");
3532 addend = -addend;
3533 }
3534 else
3535 printf ("+0x");
3536 bfd_printf_vma (abfd, addend);
3537 }
3538 if (addend2)
3539 {
3540 printf ("+0x");
3541 bfd_printf_vma (abfd, addend2);
3542 }
3543
3544 printf ("\n");
3545 }
3546
3547 if (last_filename != NULL)
3548 free (last_filename);
3549 if (last_functionname != NULL)
3550 free (last_functionname);
3551 }
3552
3553 static void
3554 dump_relocs_in_section (bfd *abfd,
3555 asection *section,
3556 void *dummy ATTRIBUTE_UNUSED)
3557 {
3558 arelent **relpp;
3559 long relcount;
3560 long relsize;
3561
3562 if ( bfd_is_abs_section (section)
3563 || bfd_is_und_section (section)
3564 || bfd_is_com_section (section)
3565 || (! process_section_p (section))
3566 || ((section->flags & SEC_RELOC) == 0))
3567 return;
3568
3569 relsize = bfd_get_reloc_upper_bound (abfd, section);
3570 if (relsize < 0)
3571 bfd_fatal (bfd_get_filename (abfd));
3572
3573 printf ("RELOCATION RECORDS FOR [%s]:", sanitize_string (section->name));
3574
3575 if (relsize == 0)
3576 {
3577 printf (" (none)\n\n");
3578 return;
3579 }
3580
3581 if ((bfd_get_file_flags (abfd) & (BFD_IN_MEMORY | BFD_LINKER_CREATED)) == 0
3582 && (/* Check that the size of the relocs is reasonable. Note that some
3583 file formats, eg aout, can have relocs whose internal size is
3584 larger than their external size, thus we check the size divided
3585 by four against the file size. See PR 23931 for an example of
3586 this. */
3587 ((ufile_ptr) (relsize / 4) > bfd_get_file_size (abfd))
3588 /* Also check the section's reloc count since if this is negative
3589 (or very large) the computation in bfd_get_reloc_upper_bound
3590 may have resulted in returning a small, positive integer.
3591 See PR 22508 for a reproducer.
3592
3593 Note - we check against file size rather than section size as
3594 it is possible for there to be more relocs that apply to a
3595 section than there are bytes in that section. */
3596 || (section->reloc_count > bfd_get_file_size (abfd))))
3597 {
3598 printf (" (too many: %#x relocs)\n", section->reloc_count);
3599 bfd_set_error (bfd_error_file_truncated);
3600 bfd_fatal (bfd_get_filename (abfd));
3601 }
3602
3603 relpp = (arelent **) xmalloc (relsize);
3604 relcount = bfd_canonicalize_reloc (abfd, section, relpp, syms);
3605
3606 if (relcount < 0)
3607 {
3608 printf ("\n");
3609 non_fatal (_("failed to read relocs in: %s"), sanitize_string (bfd_get_filename (abfd)));
3610 bfd_fatal (_("error message was"));
3611 }
3612 else if (relcount == 0)
3613 printf (" (none)\n\n");
3614 else
3615 {
3616 printf ("\n");
3617 dump_reloc_set (abfd, section, relpp, relcount);
3618 printf ("\n\n");
3619 }
3620 free (relpp);
3621 }
3622
3623 static void
3624 dump_relocs (bfd *abfd)
3625 {
3626 bfd_map_over_sections (abfd, dump_relocs_in_section, NULL);
3627 }
3628
3629 static void
3630 dump_dynamic_relocs (bfd *abfd)
3631 {
3632 long relsize;
3633 arelent **relpp;
3634 long relcount;
3635
3636 relsize = bfd_get_dynamic_reloc_upper_bound (abfd);
3637 if (relsize < 0)
3638 bfd_fatal (bfd_get_filename (abfd));
3639
3640 printf ("DYNAMIC RELOCATION RECORDS");
3641
3642 if (relsize == 0)
3643 printf (" (none)\n\n");
3644 else
3645 {
3646 relpp = (arelent **) xmalloc (relsize);
3647 relcount = bfd_canonicalize_dynamic_reloc (abfd, relpp, dynsyms);
3648
3649 if (relcount < 0)
3650 bfd_fatal (bfd_get_filename (abfd));
3651 else if (relcount == 0)
3652 printf (" (none)\n\n");
3653 else
3654 {
3655 printf ("\n");
3656 dump_reloc_set (abfd, NULL, relpp, relcount);
3657 printf ("\n\n");
3658 }
3659 free (relpp);
3660 }
3661 }
3662
3663 /* Creates a table of paths, to search for source files. */
3664
3665 static void
3666 add_include_path (const char *path)
3667 {
3668 if (path[0] == 0)
3669 return;
3670 include_path_count++;
3671 include_paths = (const char **)
3672 xrealloc (include_paths, include_path_count * sizeof (*include_paths));
3673 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
3674 if (path[1] == ':' && path[2] == 0)
3675 path = concat (path, ".", (const char *) 0);
3676 #endif
3677 include_paths[include_path_count - 1] = path;
3678 }
3679
3680 static void
3681 adjust_addresses (bfd *abfd ATTRIBUTE_UNUSED,
3682 asection *section,
3683 void *arg)
3684 {
3685 if ((section->flags & SEC_DEBUGGING) == 0)
3686 {
3687 bfd_boolean *has_reloc_p = (bfd_boolean *) arg;
3688 section->vma += adjust_section_vma;
3689 if (*has_reloc_p)
3690 section->lma += adjust_section_vma;
3691 }
3692 }
3693
3694 /* Dump selected contents of ABFD. */
3695
3696 static void
3697 dump_bfd (bfd *abfd)
3698 {
3699 /* If we are adjusting section VMA's, change them all now. Changing
3700 the BFD information is a hack. However, we must do it, or
3701 bfd_find_nearest_line will not do the right thing. */
3702 if (adjust_section_vma != 0)
3703 {
3704 bfd_boolean has_reloc = (abfd->flags & HAS_RELOC);
3705 bfd_map_over_sections (abfd, adjust_addresses, &has_reloc);
3706 }
3707
3708 if (! dump_debugging_tags && ! suppress_bfd_header)
3709 printf (_("\n%s: file format %s\n"),
3710 sanitize_string (bfd_get_filename (abfd)),
3711 abfd->xvec->name);
3712 if (dump_ar_hdrs)
3713 print_arelt_descr (stdout, abfd, TRUE, FALSE);
3714 if (dump_file_header)
3715 dump_bfd_header (abfd);
3716 if (dump_private_headers)
3717 dump_bfd_private_header (abfd);
3718 if (dump_private_options != NULL)
3719 dump_target_specific (abfd);
3720 if (! dump_debugging_tags && ! suppress_bfd_header)
3721 putchar ('\n');
3722
3723 if (dump_symtab
3724 || dump_reloc_info
3725 || disassemble
3726 || dump_debugging
3727 || dump_dwarf_section_info)
3728 syms = slurp_symtab (abfd);
3729
3730 if (dump_section_headers)
3731 dump_headers (abfd);
3732
3733 if (dump_dynamic_symtab || dump_dynamic_reloc_info
3734 || (disassemble && bfd_get_dynamic_symtab_upper_bound (abfd) > 0))
3735 dynsyms = slurp_dynamic_symtab (abfd);
3736 if (disassemble)
3737 {
3738 synthcount = bfd_get_synthetic_symtab (abfd, symcount, syms,
3739 dynsymcount, dynsyms, &synthsyms);
3740 if (synthcount < 0)
3741 synthcount = 0;
3742 }
3743
3744 if (dump_symtab)
3745 dump_symbols (abfd, FALSE);
3746 if (dump_dynamic_symtab)
3747 dump_symbols (abfd, TRUE);
3748 if (dump_dwarf_section_info)
3749 dump_dwarf (abfd);
3750 if (dump_stab_section_info)
3751 dump_stabs (abfd);
3752 if (dump_reloc_info && ! disassemble)
3753 dump_relocs (abfd);
3754 if (dump_dynamic_reloc_info && ! disassemble)
3755 dump_dynamic_relocs (abfd);
3756 if (dump_section_contents)
3757 dump_data (abfd);
3758 if (disassemble)
3759 disassemble_data (abfd);
3760
3761 if (dump_debugging)
3762 {
3763 void *dhandle;
3764
3765 dhandle = read_debugging_info (abfd, syms, symcount, TRUE);
3766 if (dhandle != NULL)
3767 {
3768 if (!print_debugging_info (stdout, dhandle, abfd, syms,
3769 bfd_demangle,
3770 dump_debugging_tags ? TRUE : FALSE))
3771 {
3772 non_fatal (_("%s: printing debugging information failed"),
3773 bfd_get_filename (abfd));
3774 exit_status = 1;
3775 }
3776
3777 free (dhandle);
3778 }
3779 /* PR 6483: If there was no STABS debug info in the file, try
3780 DWARF instead. */
3781 else if (! dump_dwarf_section_info)
3782 {
3783 dwarf_select_sections_all ();
3784 dump_dwarf (abfd);
3785 }
3786 }
3787
3788 if (syms)
3789 {
3790 free (syms);
3791 syms = NULL;
3792 }
3793
3794 if (dynsyms)
3795 {
3796 free (dynsyms);
3797 dynsyms = NULL;
3798 }
3799
3800 if (synthsyms)
3801 {
3802 free (synthsyms);
3803 synthsyms = NULL;
3804 }
3805
3806 symcount = 0;
3807 dynsymcount = 0;
3808 synthcount = 0;
3809 }
3810
3811 static void
3812 display_object_bfd (bfd *abfd)
3813 {
3814 char **matching;
3815
3816 if (bfd_check_format_matches (abfd, bfd_object, &matching))
3817 {
3818 dump_bfd (abfd);
3819 return;
3820 }
3821
3822 if (bfd_get_error () == bfd_error_file_ambiguously_recognized)
3823 {
3824 nonfatal (bfd_get_filename (abfd));
3825 list_matching_formats (matching);
3826 free (matching);
3827 return;
3828 }
3829
3830 if (bfd_get_error () != bfd_error_file_not_recognized)
3831 {
3832 nonfatal (bfd_get_filename (abfd));
3833 return;
3834 }
3835
3836 if (bfd_check_format_matches (abfd, bfd_core, &matching))
3837 {
3838 dump_bfd (abfd);
3839 return;
3840 }
3841
3842 nonfatal (bfd_get_filename (abfd));
3843
3844 if (bfd_get_error () == bfd_error_file_ambiguously_recognized)
3845 {
3846 list_matching_formats (matching);
3847 free (matching);
3848 }
3849 }
3850
3851 static void
3852 display_any_bfd (bfd *file, int level)
3853 {
3854 /* Decompress sections unless dumping the section contents. */
3855 if (!dump_section_contents)
3856 file->flags |= BFD_DECOMPRESS;
3857
3858 /* If the file is an archive, process all of its elements. */
3859 if (bfd_check_format (file, bfd_archive))
3860 {
3861 bfd *arfile = NULL;
3862 bfd *last_arfile = NULL;
3863
3864 if (level == 0)
3865 printf (_("In archive %s:\n"), sanitize_string (bfd_get_filename (file)));
3866 else if (level > 100)
3867 {
3868 /* Prevent corrupted files from spinning us into an
3869 infinite loop. 100 is an arbitrary heuristic. */
3870 fatal (_("Archive nesting is too deep"));
3871 return;
3872 }
3873 else
3874 printf (_("In nested archive %s:\n"),
3875 sanitize_string (bfd_get_filename (file)));
3876
3877 for (;;)
3878 {
3879 bfd_set_error (bfd_error_no_error);
3880
3881 arfile = bfd_openr_next_archived_file (file, arfile);
3882 if (arfile == NULL)
3883 {
3884 if (bfd_get_error () != bfd_error_no_more_archived_files)
3885 nonfatal (bfd_get_filename (file));
3886 break;
3887 }
3888
3889 display_any_bfd (arfile, level + 1);
3890
3891 if (last_arfile != NULL)
3892 {
3893 bfd_close (last_arfile);
3894 /* PR 17512: file: ac585d01. */
3895 if (arfile == last_arfile)
3896 {
3897 last_arfile = NULL;
3898 break;
3899 }
3900 }
3901 last_arfile = arfile;
3902 }
3903
3904 if (last_arfile != NULL)
3905 bfd_close (last_arfile);
3906 }
3907 else
3908 display_object_bfd (file);
3909 }
3910
3911 static void
3912 display_file (char *filename, char *target, bfd_boolean last_file)
3913 {
3914 bfd *file;
3915
3916 if (get_file_size (filename) < 1)
3917 {
3918 exit_status = 1;
3919 return;
3920 }
3921
3922 file = bfd_openr (filename, target);
3923 if (file == NULL)
3924 {
3925 nonfatal (filename);
3926 return;
3927 }
3928
3929 display_any_bfd (file, 0);
3930
3931 /* This is an optimization to improve the speed of objdump, especially when
3932 dumping a file with lots of associated debug informatiom. Calling
3933 bfd_close on such a file can take a non-trivial amount of time as there
3934 are lots of lists to walk and buffers to free. This is only really
3935 necessary however if we are about to load another file and we need the
3936 memory back. Otherwise, if we are about to exit, then we can save (a lot
3937 of) time by only doing a quick close, and allowing the OS to reclaim the
3938 memory for us. */
3939 if (! last_file)
3940 bfd_close (file);
3941 else
3942 bfd_close_all_done (file);
3943 }
3944 \f
3945 int
3946 main (int argc, char **argv)
3947 {
3948 int c;
3949 char *target = default_target;
3950 bfd_boolean seenflag = FALSE;
3951
3952 #if defined (HAVE_SETLOCALE)
3953 #if defined (HAVE_LC_MESSAGES)
3954 setlocale (LC_MESSAGES, "");
3955 #endif
3956 setlocale (LC_CTYPE, "");
3957 #endif
3958
3959 bindtextdomain (PACKAGE, LOCALEDIR);
3960 textdomain (PACKAGE);
3961
3962 program_name = *argv;
3963 xmalloc_set_program_name (program_name);
3964 bfd_set_error_program_name (program_name);
3965
3966 START_PROGRESS (program_name, 0);
3967
3968 expandargv (&argc, &argv);
3969
3970 if (bfd_init () != BFD_INIT_MAGIC)
3971 fatal (_("fatal error: libbfd ABI mismatch"));
3972 set_default_bfd_target ();
3973
3974 while ((c = getopt_long (argc, argv,
3975 "pP:ib:m:M:VvCdDlfFaHhrRtTxsSI:j:wE:zgeGW::",
3976 long_options, (int *) 0))
3977 != EOF)
3978 {
3979 switch (c)
3980 {
3981 case 0:
3982 break; /* We've been given a long option. */
3983 case 'm':
3984 machine = optarg;
3985 break;
3986 case 'M':
3987 {
3988 char *options;
3989 if (disassembler_options)
3990 /* Ignore potential memory leak for now. */
3991 options = concat (disassembler_options, ",",
3992 optarg, (const char *) NULL);
3993 else
3994 options = optarg;
3995 disassembler_options = remove_whitespace_and_extra_commas (options);
3996 }
3997 break;
3998 case 'j':
3999 add_only (optarg);
4000 break;
4001 case 'F':
4002 display_file_offsets = TRUE;
4003 break;
4004 case 'l':
4005 with_line_numbers = TRUE;
4006 break;
4007 case 'b':
4008 target = optarg;
4009 break;
4010 case 'C':
4011 do_demangle = TRUE;
4012 if (optarg != NULL)
4013 {
4014 enum demangling_styles style;
4015
4016 style = cplus_demangle_name_to_style (optarg);
4017 if (style == unknown_demangling)
4018 fatal (_("unknown demangling style `%s'"),
4019 optarg);
4020
4021 cplus_demangle_set_style (style);
4022 }
4023 break;
4024 case OPTION_RECURSE_LIMIT:
4025 demangle_flags &= ~ DMGL_NO_RECURSE_LIMIT;
4026 break;
4027 case OPTION_NO_RECURSE_LIMIT:
4028 demangle_flags |= DMGL_NO_RECURSE_LIMIT;
4029 break;
4030 case 'w':
4031 do_wide = wide_output = TRUE;
4032 break;
4033 case OPTION_ADJUST_VMA:
4034 adjust_section_vma = parse_vma (optarg, "--adjust-vma");
4035 break;
4036 case OPTION_START_ADDRESS:
4037 start_address = parse_vma (optarg, "--start-address");
4038 if ((stop_address != (bfd_vma) -1) && stop_address <= start_address)
4039 fatal (_("error: the start address should be before the end address"));
4040 break;
4041 case OPTION_STOP_ADDRESS:
4042 stop_address = parse_vma (optarg, "--stop-address");
4043 if ((start_address != (bfd_vma) -1) && stop_address <= start_address)
4044 fatal (_("error: the stop address should be after the start address"));
4045 break;
4046 case OPTION_PREFIX:
4047 prefix = optarg;
4048 prefix_length = strlen (prefix);
4049 /* Remove an unnecessary trailing '/' */
4050 while (IS_DIR_SEPARATOR (prefix[prefix_length - 1]))
4051 prefix_length--;
4052 break;
4053 case OPTION_PREFIX_STRIP:
4054 prefix_strip = atoi (optarg);
4055 if (prefix_strip < 0)
4056 fatal (_("error: prefix strip must be non-negative"));
4057 break;
4058 case OPTION_INSN_WIDTH:
4059 insn_width = strtoul (optarg, NULL, 0);
4060 if (insn_width <= 0)
4061 fatal (_("error: instruction width must be positive"));
4062 break;
4063 case OPTION_INLINES:
4064 unwind_inlines = TRUE;
4065 break;
4066 case 'E':
4067 if (strcmp (optarg, "B") == 0)
4068 endian = BFD_ENDIAN_BIG;
4069 else if (strcmp (optarg, "L") == 0)
4070 endian = BFD_ENDIAN_LITTLE;
4071 else
4072 {
4073 nonfatal (_("unrecognized -E option"));
4074 usage (stderr, 1);
4075 }
4076 break;
4077 case OPTION_ENDIAN:
4078 if (strncmp (optarg, "big", strlen (optarg)) == 0)
4079 endian = BFD_ENDIAN_BIG;
4080 else if (strncmp (optarg, "little", strlen (optarg)) == 0)
4081 endian = BFD_ENDIAN_LITTLE;
4082 else
4083 {
4084 non_fatal (_("unrecognized --endian type `%s'"), optarg);
4085 exit_status = 1;
4086 usage (stderr, 1);
4087 }
4088 break;
4089
4090 case 'f':
4091 dump_file_header = TRUE;
4092 seenflag = TRUE;
4093 break;
4094 case 'i':
4095 formats_info = TRUE;
4096 seenflag = TRUE;
4097 break;
4098 case 'I':
4099 add_include_path (optarg);
4100 break;
4101 case 'p':
4102 dump_private_headers = TRUE;
4103 seenflag = TRUE;
4104 break;
4105 case 'P':
4106 dump_private_options = optarg;
4107 seenflag = TRUE;
4108 break;
4109 case 'x':
4110 dump_private_headers = TRUE;
4111 dump_symtab = TRUE;
4112 dump_reloc_info = TRUE;
4113 dump_file_header = TRUE;
4114 dump_ar_hdrs = TRUE;
4115 dump_section_headers = TRUE;
4116 seenflag = TRUE;
4117 break;
4118 case 't':
4119 dump_symtab = TRUE;
4120 seenflag = TRUE;
4121 break;
4122 case 'T':
4123 dump_dynamic_symtab = TRUE;
4124 seenflag = TRUE;
4125 break;
4126 case 'd':
4127 disassemble = TRUE;
4128 seenflag = TRUE;
4129 disasm_sym = optarg;
4130 break;
4131 case 'z':
4132 disassemble_zeroes = TRUE;
4133 break;
4134 case 'D':
4135 disassemble = TRUE;
4136 disassemble_all = TRUE;
4137 seenflag = TRUE;
4138 break;
4139 case 'S':
4140 disassemble = TRUE;
4141 with_source_code = TRUE;
4142 seenflag = TRUE;
4143 break;
4144 case 'g':
4145 dump_debugging = 1;
4146 seenflag = TRUE;
4147 break;
4148 case 'e':
4149 dump_debugging = 1;
4150 dump_debugging_tags = 1;
4151 do_demangle = TRUE;
4152 seenflag = TRUE;
4153 break;
4154 case 'W':
4155 dump_dwarf_section_info = TRUE;
4156 seenflag = TRUE;
4157 if (optarg)
4158 dwarf_select_sections_by_letters (optarg);
4159 else
4160 dwarf_select_sections_all ();
4161 break;
4162 case OPTION_DWARF:
4163 dump_dwarf_section_info = TRUE;
4164 seenflag = TRUE;
4165 if (optarg)
4166 dwarf_select_sections_by_names (optarg);
4167 else
4168 dwarf_select_sections_all ();
4169 break;
4170 case OPTION_DWARF_DEPTH:
4171 {
4172 char *cp;
4173 dwarf_cutoff_level = strtoul (optarg, & cp, 0);
4174 }
4175 break;
4176 case OPTION_DWARF_START:
4177 {
4178 char *cp;
4179 dwarf_start_die = strtoul (optarg, & cp, 0);
4180 suppress_bfd_header = 1;
4181 }
4182 break;
4183 case OPTION_DWARF_CHECK:
4184 dwarf_check = TRUE;
4185 break;
4186 case 'G':
4187 dump_stab_section_info = TRUE;
4188 seenflag = TRUE;
4189 break;
4190 case 's':
4191 dump_section_contents = TRUE;
4192 seenflag = TRUE;
4193 break;
4194 case 'r':
4195 dump_reloc_info = TRUE;
4196 seenflag = TRUE;
4197 break;
4198 case 'R':
4199 dump_dynamic_reloc_info = TRUE;
4200 seenflag = TRUE;
4201 break;
4202 case 'a':
4203 dump_ar_hdrs = TRUE;
4204 seenflag = TRUE;
4205 break;
4206 case 'h':
4207 dump_section_headers = TRUE;
4208 seenflag = TRUE;
4209 break;
4210 case 'v':
4211 case 'V':
4212 show_version = TRUE;
4213 seenflag = TRUE;
4214 break;
4215
4216 case 'H':
4217 usage (stdout, 0);
4218 /* No need to set seenflag or to break - usage() does not return. */
4219 default:
4220 usage (stderr, 1);
4221 }
4222 }
4223
4224 if (show_version)
4225 print_version ("objdump");
4226
4227 if (!seenflag)
4228 usage (stderr, 2);
4229
4230 if (formats_info)
4231 exit_status = display_info ();
4232 else
4233 {
4234 if (optind == argc)
4235 display_file ("a.out", target, TRUE);
4236 else
4237 for (; optind < argc;)
4238 {
4239 display_file (argv[optind], target, optind == argc - 1);
4240 optind++;
4241 }
4242 }
4243
4244 free_only_list ();
4245
4246 END_PROGRESS (program_name);
4247
4248 return exit_status;
4249 }