Ben Cheng | 25b3c04 | 2013-11-20 14:45:36 -0800 | [diff] [blame] | 1 | /* Print information from ELF file in human-readable form. |
| 2 | Copyright (C) 2005, 2006, 2007, 2009, 2011, 2012 Red Hat, Inc. |
| 3 | This file is part of Red Hat elfutils. |
| 4 | Written by Ulrich Drepper <drepper@redhat.com>, 2005. |
| 5 | |
| 6 | Red Hat elfutils is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by the |
| 8 | Free Software Foundation; version 2 of the License. |
| 9 | |
| 10 | Red Hat elfutils is distributed in the hope that it will be useful, but |
| 11 | WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU General Public License along |
| 16 | with Red Hat elfutils; if not, write to the Free Software Foundation, |
| 17 | Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA. |
| 18 | |
| 19 | Red Hat elfutils is an included package of the Open Invention Network. |
| 20 | An included package of the Open Invention Network is a package for which |
| 21 | Open Invention Network licensees cross-license their patents. No patent |
| 22 | license is granted, either expressly or impliedly, by designation as an |
| 23 | included package. Should you wish to participate in the Open Invention |
| 24 | Network licensing program, please visit www.openinventionnetwork.com |
| 25 | <http://www.openinventionnetwork.com>. */ |
| 26 | |
| 27 | #ifdef HAVE_CONFIG_H |
| 28 | # include <config.h> |
| 29 | #endif |
| 30 | |
| 31 | #include <argp.h> |
| 32 | #include <error.h> |
| 33 | #include <fcntl.h> |
| 34 | #include <inttypes.h> |
| 35 | #include <libintl.h> |
| 36 | #include <locale.h> |
| 37 | #include <mcheck.h> |
| 38 | #include <stdbool.h> |
| 39 | #include <stdio.h> |
| 40 | #include <stdio_ext.h> |
| 41 | #include <stdlib.h> |
| 42 | #include <string.h> |
| 43 | #include <unistd.h> |
| 44 | #include <sys/param.h> |
| 45 | |
| 46 | #include <system.h> |
| 47 | #include "../libebl/libeblP.h" |
| 48 | |
| 49 | |
| 50 | /* Name and version of program. */ |
| 51 | static void print_version (FILE *stream, struct argp_state *state); |
| 52 | ARGP_PROGRAM_VERSION_HOOK_DEF = print_version; |
| 53 | |
| 54 | /* Bug report address. */ |
| 55 | ARGP_PROGRAM_BUG_ADDRESS_DEF = PACKAGE_BUGREPORT; |
| 56 | |
| 57 | |
| 58 | /* Definitions of arguments for argp functions. */ |
| 59 | static const struct argp_option options[] = |
| 60 | { |
| 61 | { NULL, 0, NULL, 0, N_("Mode selection:"), 0 }, |
| 62 | { "reloc", 'r', NULL, 0, N_("Display relocation information."), 0 }, |
| 63 | { "full-contents", 's', NULL, 0, |
| 64 | N_("Display the full contents of all sections requested"), 0 }, |
| 65 | { "disassemble", 'd', NULL, 0, |
| 66 | N_("Display assembler code of executable sections"), 0 }, |
| 67 | |
| 68 | { NULL, 0, NULL, 0, N_("Output content selection:"), 0 }, |
| 69 | { "section", 'j', "NAME", 0, |
| 70 | N_("Only display information for section NAME."), 0 }, |
| 71 | |
| 72 | { NULL, 0, NULL, 0, NULL, 0 } |
| 73 | }; |
| 74 | |
| 75 | /* Short description of program. */ |
| 76 | static const char doc[] = N_("\ |
| 77 | Show information from FILEs (a.out by default)."); |
| 78 | |
| 79 | /* Strings for arguments in help texts. */ |
| 80 | static const char args_doc[] = N_("[FILE...]"); |
| 81 | |
| 82 | /* Prototype for option handler. */ |
| 83 | static error_t parse_opt (int key, char *arg, struct argp_state *state); |
| 84 | |
| 85 | /* Parser children. */ |
| 86 | static struct argp_child argp_children[] = |
| 87 | { |
| 88 | { &color_argp, 0, N_("Output formatting"), 2 }, |
| 89 | { NULL, 0, NULL, 0} |
| 90 | }; |
| 91 | |
| 92 | /* Data structure to communicate with argp functions. */ |
| 93 | static const struct argp argp = |
| 94 | { |
| 95 | options, parse_opt, args_doc, doc, argp_children, NULL, NULL |
| 96 | }; |
| 97 | |
| 98 | |
| 99 | /* Print symbols in file named FNAME. */ |
| 100 | static int process_file (const char *fname, bool more_than_one); |
| 101 | |
| 102 | /* Handle content of archive. */ |
| 103 | static int handle_ar (int fd, Elf *elf, const char *prefix, const char *fname, |
| 104 | const char *suffix); |
| 105 | |
| 106 | /* Handle ELF file. */ |
| 107 | static int handle_elf (Elf *elf, const char *prefix, const char *fname, |
| 108 | const char *suffix); |
| 109 | |
| 110 | |
| 111 | #define INTERNAL_ERROR(fname) \ |
| 112 | error (EXIT_FAILURE, 0, gettext ("%s: INTERNAL ERROR %d (%s-%s): %s"), \ |
| 113 | fname, __LINE__, PACKAGE_VERSION, __DATE__, elf_errmsg (-1)) |
| 114 | |
| 115 | |
| 116 | /* List of sections which should be used. */ |
| 117 | static struct section_list |
| 118 | { |
| 119 | bool is_name; |
| 120 | union |
| 121 | { |
| 122 | const char *name; |
| 123 | uint32_t scnndx; |
| 124 | }; |
| 125 | struct section_list *next; |
| 126 | } *section_list; |
| 127 | |
| 128 | |
| 129 | /* If true print archive index. */ |
| 130 | static bool print_relocs; |
| 131 | |
| 132 | /* If true print full contents of requested sections. */ |
| 133 | static bool print_full_content; |
| 134 | |
| 135 | /* If true print disassembled output.. */ |
| 136 | static bool print_disasm; |
| 137 | |
| 138 | |
| 139 | int |
| 140 | main (int argc, char *argv[]) |
| 141 | { |
| 142 | /* Make memory leak detection possible. */ |
| 143 | mtrace (); |
| 144 | |
| 145 | /* We use no threads here which can interfere with handling a stream. */ |
| 146 | (void) __fsetlocking (stdin, FSETLOCKING_BYCALLER); |
| 147 | (void) __fsetlocking (stdout, FSETLOCKING_BYCALLER); |
| 148 | (void) __fsetlocking (stderr, FSETLOCKING_BYCALLER); |
| 149 | |
| 150 | /* Set locale. */ |
| 151 | (void) setlocale (LC_ALL, ""); |
| 152 | |
| 153 | /* Make sure the message catalog can be found. */ |
| 154 | (void) bindtextdomain (PACKAGE_TARNAME, LOCALEDIR); |
| 155 | |
| 156 | /* Initialize the message catalog. */ |
| 157 | (void) textdomain (PACKAGE_TARNAME); |
| 158 | |
| 159 | /* Parse and process arguments. */ |
| 160 | int remaining; |
| 161 | (void) argp_parse (&argp, argc, argv, 0, &remaining, NULL); |
| 162 | |
| 163 | /* Tell the library which version we are expecting. */ |
| 164 | (void) elf_version (EV_CURRENT); |
| 165 | |
| 166 | int result = 0; |
| 167 | if (remaining == argc) |
| 168 | /* The user didn't specify a name so we use a.out. */ |
| 169 | result = process_file ("a.out", false); |
| 170 | else |
| 171 | { |
| 172 | /* Process all the remaining files. */ |
| 173 | const bool more_than_one = remaining + 1 < argc; |
| 174 | |
| 175 | do |
| 176 | result |= process_file (argv[remaining], more_than_one); |
| 177 | while (++remaining < argc); |
| 178 | } |
| 179 | |
| 180 | return result; |
| 181 | } |
| 182 | |
| 183 | |
| 184 | /* Print the version information. */ |
| 185 | static void |
| 186 | print_version (FILE *stream, struct argp_state *state __attribute__ ((unused))) |
| 187 | { |
| 188 | fprintf (stream, "objdump (%s) %s\n", PACKAGE_NAME, PACKAGE_VERSION); |
| 189 | fprintf (stream, gettext ("\ |
| 190 | Copyright (C) %s Red Hat, Inc.\n\ |
| 191 | This is free software; see the source for copying conditions. There is NO\n\ |
| 192 | warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\ |
| 193 | "), "2012"); |
| 194 | fprintf (stream, gettext ("Written by %s.\n"), "Ulrich Drepper"); |
| 195 | } |
| 196 | |
| 197 | |
| 198 | /* Handle program arguments. */ |
| 199 | static error_t |
| 200 | parse_opt (int key, char *arg, |
| 201 | struct argp_state *state __attribute__ ((unused))) |
| 202 | { |
| 203 | /* True if any of the control options is set. */ |
| 204 | static bool any_control_option; |
| 205 | |
| 206 | switch (key) |
| 207 | { |
| 208 | case 'j': |
| 209 | { |
| 210 | struct section_list *newp = xmalloc (sizeof (*newp)); |
| 211 | char *endp; |
| 212 | newp->scnndx = strtoul (arg, &endp, 0); |
| 213 | if (*endp == 0) |
| 214 | newp->is_name = false; |
| 215 | else |
| 216 | { |
| 217 | newp->name = arg; |
| 218 | newp->is_name = true; |
| 219 | } |
| 220 | newp->next = section_list; |
| 221 | section_list = newp; |
| 222 | } |
| 223 | any_control_option = true; |
| 224 | break; |
| 225 | |
| 226 | case 'd': |
| 227 | print_disasm = true; |
| 228 | any_control_option = true; |
| 229 | break; |
| 230 | |
| 231 | case 'r': |
| 232 | print_relocs = true; |
| 233 | any_control_option = true; |
| 234 | break; |
| 235 | |
| 236 | case 's': |
| 237 | print_full_content = true; |
| 238 | any_control_option = true; |
| 239 | break; |
| 240 | |
| 241 | case ARGP_KEY_FINI: |
| 242 | if (! any_control_option) |
| 243 | { |
| 244 | fputs (gettext ("No operation specified.\n"), stderr); |
| 245 | argp_help (&argp, stderr, ARGP_HELP_SEE, |
| 246 | program_invocation_short_name); |
| 247 | exit (EXIT_FAILURE); |
| 248 | } |
| 249 | |
| 250 | default: |
| 251 | return ARGP_ERR_UNKNOWN; |
| 252 | } |
| 253 | return 0; |
| 254 | } |
| 255 | |
| 256 | |
| 257 | /* Open the file and determine the type. */ |
| 258 | static int |
| 259 | process_file (const char *fname, bool more_than_one) |
| 260 | { |
| 261 | /* Open the file. */ |
| 262 | int fd = open (fname, O_RDONLY); |
| 263 | if (fd == -1) |
| 264 | { |
| 265 | error (0, errno, gettext ("cannot open %s"), fname); |
| 266 | return 1; |
| 267 | } |
| 268 | |
| 269 | /* Now get the ELF descriptor. */ |
| 270 | Elf *elf = elf_begin (fd, ELF_C_READ_MMAP, NULL); |
| 271 | if (elf != NULL) |
| 272 | { |
| 273 | if (elf_kind (elf) == ELF_K_ELF) |
| 274 | { |
| 275 | int result = handle_elf (elf, more_than_one ? "" : NULL, |
| 276 | fname, NULL); |
| 277 | |
| 278 | if (elf_end (elf) != 0) |
| 279 | INTERNAL_ERROR (fname); |
| 280 | |
| 281 | if (close (fd) != 0) |
| 282 | error (EXIT_FAILURE, errno, gettext ("while close `%s'"), fname); |
| 283 | |
| 284 | return result; |
| 285 | } |
| 286 | else if (elf_kind (elf) == ELF_K_AR) |
| 287 | { |
| 288 | int result = handle_ar (fd, elf, NULL, fname, NULL); |
| 289 | |
| 290 | if (elf_end (elf) != 0) |
| 291 | INTERNAL_ERROR (fname); |
| 292 | |
| 293 | if (close (fd) != 0) |
| 294 | error (EXIT_FAILURE, errno, gettext ("while close `%s'"), fname); |
| 295 | |
| 296 | return result; |
| 297 | } |
| 298 | |
| 299 | /* We cannot handle this type. Close the descriptor anyway. */ |
| 300 | if (elf_end (elf) != 0) |
| 301 | INTERNAL_ERROR (fname); |
| 302 | } |
| 303 | |
| 304 | error (0, 0, gettext ("%s: File format not recognized"), fname); |
| 305 | |
| 306 | return 1; |
| 307 | } |
| 308 | |
| 309 | |
| 310 | static int |
| 311 | handle_ar (int fd, Elf *elf, const char *prefix, const char *fname, |
| 312 | const char *suffix) |
| 313 | { |
| 314 | size_t fname_len = strlen (fname) + 1; |
| 315 | size_t prefix_len = prefix != NULL ? strlen (prefix) : 0; |
| 316 | char new_prefix[prefix_len + fname_len + 2]; |
| 317 | size_t suffix_len = suffix != NULL ? strlen (suffix) : 0; |
| 318 | char new_suffix[suffix_len + 2]; |
| 319 | Elf *subelf; |
| 320 | Elf_Cmd cmd = ELF_C_READ_MMAP; |
| 321 | int result = 0; |
| 322 | |
| 323 | char *cp = new_prefix; |
| 324 | if (prefix != NULL) |
| 325 | cp = stpcpy (cp, prefix); |
| 326 | cp = stpcpy (cp, fname); |
| 327 | stpcpy (cp, "["); |
| 328 | |
| 329 | cp = new_suffix; |
| 330 | if (suffix != NULL) |
| 331 | cp = stpcpy (cp, suffix); |
| 332 | stpcpy (cp, "]"); |
| 333 | |
| 334 | /* Process all the files contained in the archive. */ |
| 335 | while ((subelf = elf_begin (fd, cmd, elf)) != NULL) |
| 336 | { |
| 337 | /* The the header for this element. */ |
| 338 | Elf_Arhdr *arhdr = elf_getarhdr (subelf); |
| 339 | |
| 340 | /* Skip over the index entries. */ |
| 341 | if (strcmp (arhdr->ar_name, "/") != 0 |
| 342 | && strcmp (arhdr->ar_name, "//") != 0) |
| 343 | { |
| 344 | if (elf_kind (subelf) == ELF_K_ELF) |
| 345 | result |= handle_elf (subelf, new_prefix, arhdr->ar_name, |
| 346 | new_suffix); |
| 347 | else if (elf_kind (subelf) == ELF_K_AR) |
| 348 | result |= handle_ar (fd, subelf, new_prefix, arhdr->ar_name, |
| 349 | new_suffix); |
| 350 | else |
| 351 | { |
| 352 | error (0, 0, gettext ("%s%s%s: file format not recognized"), |
| 353 | new_prefix, arhdr->ar_name, new_suffix); |
| 354 | result = 1; |
| 355 | } |
| 356 | } |
| 357 | |
| 358 | /* Get next archive element. */ |
| 359 | cmd = elf_next (subelf); |
| 360 | if (elf_end (subelf) != 0) |
| 361 | INTERNAL_ERROR (fname); |
| 362 | } |
| 363 | |
| 364 | return result; |
| 365 | } |
| 366 | |
| 367 | |
| 368 | static void |
| 369 | show_relocs_x (Ebl *ebl, GElf_Shdr *shdr, Elf_Data *symdata, |
| 370 | Elf_Data *xndxdata, size_t symstrndx, size_t shstrndx, |
| 371 | GElf_Addr r_offset, GElf_Xword r_info, GElf_Sxword r_addend) |
| 372 | { |
| 373 | int elfclass = gelf_getclass (ebl->elf); |
| 374 | char buf[128]; |
| 375 | |
| 376 | printf ("%0*" PRIx64 " %-20s ", |
| 377 | elfclass == ELFCLASS32 ? 8 : 16, r_offset, |
| 378 | ebl_reloc_type_name (ebl, GELF_R_TYPE (r_info), buf, sizeof (buf))); |
| 379 | |
| 380 | Elf32_Word xndx; |
| 381 | GElf_Sym symmem; |
| 382 | GElf_Sym *sym = gelf_getsymshndx (symdata, xndxdata, GELF_R_SYM (r_info), |
| 383 | &symmem, &xndx); |
| 384 | |
| 385 | if (sym == NULL) |
| 386 | printf ("<%s %ld>", |
| 387 | gettext ("INVALID SYMBOL"), (long int) GELF_R_SYM (r_info)); |
| 388 | else if (GELF_ST_TYPE (sym->st_info) != STT_SECTION) |
| 389 | printf ("%s", |
| 390 | elf_strptr (ebl->elf, symstrndx, sym->st_name)); |
| 391 | else |
| 392 | { |
| 393 | GElf_Shdr destshdr_mem; |
| 394 | GElf_Shdr *destshdr; |
| 395 | destshdr = gelf_getshdr (elf_getscn (ebl->elf, |
| 396 | sym->st_shndx == SHN_XINDEX |
| 397 | ? xndx : sym->st_shndx), |
| 398 | &destshdr_mem); |
| 399 | |
| 400 | if (shdr == NULL) |
| 401 | printf ("<%s %ld>", |
| 402 | gettext ("INVALID SECTION"), |
| 403 | (long int) (sym->st_shndx == SHN_XINDEX |
| 404 | ? xndx : sym->st_shndx)); |
| 405 | else |
| 406 | printf ("%s", |
| 407 | elf_strptr (ebl->elf, shstrndx, destshdr->sh_name)); |
| 408 | } |
| 409 | |
| 410 | if (r_addend != 0) |
| 411 | { |
| 412 | char sign = '+'; |
| 413 | if (r_addend < 0) |
| 414 | { |
| 415 | sign = '-'; |
| 416 | r_addend = -r_addend; |
| 417 | } |
| 418 | printf ("%c%#" PRIx64, sign, r_addend); |
| 419 | } |
| 420 | putchar ('\n'); |
| 421 | } |
| 422 | |
| 423 | |
| 424 | static void |
| 425 | show_relocs_rel (Ebl *ebl, GElf_Shdr *shdr, Elf_Data *data, |
| 426 | Elf_Data *symdata, Elf_Data *xndxdata, size_t symstrndx, |
| 427 | size_t shstrndx) |
| 428 | { |
| 429 | int nentries = shdr->sh_size / shdr->sh_entsize; |
| 430 | |
| 431 | for (int cnt = 0; cnt < nentries; ++cnt) |
| 432 | { |
| 433 | GElf_Rel relmem; |
| 434 | GElf_Rel *rel; |
| 435 | |
| 436 | rel = gelf_getrel (data, cnt, &relmem); |
| 437 | if (rel != NULL) |
| 438 | show_relocs_x (ebl, shdr, symdata, xndxdata, symstrndx, shstrndx, |
| 439 | rel->r_offset, rel->r_info, 0); |
| 440 | } |
| 441 | } |
| 442 | |
| 443 | |
| 444 | static void |
| 445 | show_relocs_rela (Ebl *ebl, GElf_Shdr *shdr, Elf_Data *data, |
| 446 | Elf_Data *symdata, Elf_Data *xndxdata, size_t symstrndx, |
| 447 | size_t shstrndx) |
| 448 | { |
| 449 | int nentries = shdr->sh_size / shdr->sh_entsize; |
| 450 | |
| 451 | for (int cnt = 0; cnt < nentries; ++cnt) |
| 452 | { |
| 453 | GElf_Rela relmem; |
| 454 | GElf_Rela *rel; |
| 455 | |
| 456 | rel = gelf_getrela (data, cnt, &relmem); |
| 457 | if (rel != NULL) |
| 458 | show_relocs_x (ebl, shdr, symdata, xndxdata, symstrndx, shstrndx, |
| 459 | rel->r_offset, rel->r_info, rel->r_addend); |
| 460 | } |
| 461 | } |
| 462 | |
| 463 | |
| 464 | static bool |
| 465 | section_match (Elf *elf, uint32_t scnndx, GElf_Shdr *shdr, size_t shstrndx) |
| 466 | { |
| 467 | if (section_list == NULL) |
| 468 | return true; |
| 469 | |
| 470 | struct section_list *runp = section_list; |
| 471 | |
| 472 | do |
| 473 | { |
| 474 | if (runp->is_name) |
| 475 | { |
| 476 | if (strcmp (runp->name, |
| 477 | elf_strptr (elf, shstrndx, shdr->sh_name)) == 0) |
| 478 | return true; |
| 479 | } |
| 480 | else |
| 481 | { |
| 482 | if (runp->scnndx == scnndx) |
| 483 | return true; |
| 484 | } |
| 485 | |
| 486 | runp = runp->next; |
| 487 | } |
| 488 | while (runp != NULL); |
| 489 | |
| 490 | return false; |
| 491 | } |
| 492 | |
| 493 | |
| 494 | static int |
| 495 | show_relocs (Ebl *ebl, const char *fname, uint32_t shstrndx) |
| 496 | { |
| 497 | int elfclass = gelf_getclass (ebl->elf); |
| 498 | |
| 499 | Elf_Scn *scn = NULL; |
| 500 | while ((scn = elf_nextscn (ebl->elf, scn)) != NULL) |
| 501 | { |
| 502 | GElf_Shdr shdr_mem; |
| 503 | GElf_Shdr *shdr = gelf_getshdr (scn, &shdr_mem); |
| 504 | |
| 505 | if (shdr == NULL) |
| 506 | INTERNAL_ERROR (fname); |
| 507 | |
| 508 | if (shdr->sh_type == SHT_REL || shdr->sh_type == SHT_RELA) |
| 509 | { |
| 510 | if (! section_match (ebl->elf, elf_ndxscn (scn), shdr, shstrndx)) |
| 511 | continue; |
| 512 | |
| 513 | GElf_Shdr destshdr_mem; |
| 514 | GElf_Shdr *destshdr = gelf_getshdr (elf_getscn (ebl->elf, |
| 515 | shdr->sh_info), |
| 516 | &destshdr_mem); |
| 517 | |
| 518 | printf (gettext ("\nRELOCATION RECORDS FOR [%s]:\n" |
| 519 | "%-*s TYPE VALUE\n"), |
| 520 | elf_strptr (ebl->elf, shstrndx, destshdr->sh_name), |
| 521 | elfclass == ELFCLASS32 ? 8 : 16, gettext ("OFFSET")); |
| 522 | |
| 523 | /* Get the data of the section. */ |
| 524 | Elf_Data *data = elf_getdata (scn, NULL); |
| 525 | if (data == NULL) |
| 526 | continue; |
| 527 | |
| 528 | /* Get the symbol table information. */ |
| 529 | Elf_Scn *symscn = elf_getscn (ebl->elf, shdr->sh_link); |
| 530 | GElf_Shdr symshdr_mem; |
| 531 | GElf_Shdr *symshdr = gelf_getshdr (symscn, &symshdr_mem); |
| 532 | Elf_Data *symdata = elf_getdata (symscn, NULL); |
| 533 | |
| 534 | /* Search for the optional extended section index table. */ |
| 535 | Elf_Data *xndxdata = NULL; |
| 536 | Elf_Scn *xndxscn = NULL; |
| 537 | while ((xndxscn = elf_nextscn (ebl->elf, xndxscn)) != NULL) |
| 538 | { |
| 539 | GElf_Shdr xndxshdr_mem; |
| 540 | GElf_Shdr *xndxshdr; |
| 541 | |
| 542 | xndxshdr = gelf_getshdr (xndxscn, &xndxshdr_mem); |
| 543 | if (xndxshdr != NULL && xndxshdr->sh_type == SHT_SYMTAB_SHNDX |
| 544 | && xndxshdr->sh_link == elf_ndxscn (symscn)) |
| 545 | { |
| 546 | /* Found it. */ |
| 547 | xndxdata = elf_getdata (xndxscn, NULL); |
| 548 | break; |
| 549 | } |
| 550 | } |
| 551 | |
| 552 | if (shdr->sh_type == SHT_REL) |
| 553 | show_relocs_rel (ebl, shdr, data, symdata, xndxdata, |
| 554 | symshdr->sh_link, shstrndx); |
| 555 | else |
| 556 | show_relocs_rela (ebl, shdr, data, symdata, xndxdata, |
| 557 | symshdr->sh_link, shstrndx); |
| 558 | |
| 559 | putchar ('\n'); |
| 560 | } |
| 561 | } |
| 562 | |
| 563 | return 0; |
| 564 | } |
| 565 | |
| 566 | |
| 567 | static int |
| 568 | show_full_content (Ebl *ebl, const char *fname, uint32_t shstrndx) |
| 569 | { |
| 570 | Elf_Scn *scn = NULL; |
| 571 | while ((scn = elf_nextscn (ebl->elf, scn)) != NULL) |
| 572 | { |
| 573 | GElf_Shdr shdr_mem; |
| 574 | GElf_Shdr *shdr = gelf_getshdr (scn, &shdr_mem); |
| 575 | |
| 576 | if (shdr == NULL) |
| 577 | INTERNAL_ERROR (fname); |
| 578 | |
| 579 | if (shdr->sh_type == SHT_PROGBITS && shdr->sh_size > 0) |
| 580 | { |
| 581 | if (! section_match (ebl->elf, elf_ndxscn (scn), shdr, shstrndx)) |
| 582 | continue; |
| 583 | |
| 584 | printf (gettext ("Contents of section %s:\n"), |
| 585 | elf_strptr (ebl->elf, shstrndx, shdr->sh_name)); |
| 586 | |
| 587 | /* Get the data of the section. */ |
| 588 | Elf_Data *data = elf_getdata (scn, NULL); |
| 589 | if (data == NULL) |
| 590 | continue; |
| 591 | |
| 592 | unsigned char *cp = data->d_buf; |
| 593 | size_t cnt; |
| 594 | for (cnt = 0; cnt + 16 < data->d_size; cp += 16, cnt += 16) |
| 595 | { |
| 596 | printf (" %04zx ", cnt); |
| 597 | |
| 598 | for (size_t inner = 0; inner < 16; inner += 4) |
| 599 | printf ("%02hhx%02hhx%02hhx%02hhx ", |
| 600 | cp[inner], cp[inner + 1], cp[inner + 2], |
| 601 | cp[inner + 3]); |
| 602 | fputc_unlocked (' ', stdout); |
| 603 | |
| 604 | for (size_t inner = 0; inner < 16; ++inner) |
| 605 | fputc_unlocked (isascii (cp[inner]) && isprint (cp[inner]) |
| 606 | ? cp[inner] : '.', stdout); |
| 607 | fputc_unlocked ('\n', stdout); |
| 608 | } |
| 609 | |
| 610 | printf (" %04zx ", cnt); |
| 611 | |
| 612 | size_t remaining = data->d_size - cnt; |
| 613 | size_t inner; |
| 614 | for (inner = 0; inner + 4 <= remaining; inner += 4) |
| 615 | printf ("%02hhx%02hhx%02hhx%02hhx ", |
| 616 | cp[inner], cp[inner + 1], cp[inner + 2], cp[inner + 3]); |
| 617 | |
| 618 | for (; inner < remaining; ++inner) |
| 619 | printf ("%02hhx", cp[inner]); |
| 620 | |
| 621 | for (inner = 2 * (16 - inner) + (16 - inner + 3) / 4 + 1; inner > 0; |
| 622 | --inner) |
| 623 | fputc_unlocked (' ', stdout); |
| 624 | |
| 625 | for (inner = 0; inner < remaining; ++inner) |
| 626 | fputc_unlocked (isascii (cp[inner]) && isprint (cp[inner]) |
| 627 | ? cp[inner] : '.', stdout); |
| 628 | fputc_unlocked ('\n', stdout); |
| 629 | |
| 630 | fputc_unlocked ('\n', stdout); |
| 631 | } |
| 632 | } |
| 633 | |
| 634 | return 0; |
| 635 | } |
| 636 | |
| 637 | |
| 638 | struct disasm_info |
| 639 | { |
| 640 | GElf_Addr addr; |
| 641 | const uint8_t *cur; |
| 642 | const uint8_t *last_end; |
| 643 | const char *address_color; |
| 644 | const char *bytes_color; |
| 645 | }; |
| 646 | |
| 647 | |
| 648 | // XXX This is not the preferred output for all architectures. Needs |
| 649 | // XXX customization, too. |
| 650 | static int |
| 651 | disasm_output (char *buf, size_t buflen, void *arg) |
| 652 | { |
| 653 | struct disasm_info *info = (struct disasm_info *) arg; |
| 654 | |
| 655 | if (info->address_color != NULL) |
| 656 | printf ("%s%8" PRIx64 "%s: ", |
| 657 | info->address_color, (uint64_t) info->addr, color_off); |
| 658 | else |
| 659 | printf ("%8" PRIx64 ": ", (uint64_t) info->addr); |
| 660 | |
| 661 | if (info->bytes_color != NULL) |
| 662 | fputs_unlocked (info->bytes_color, stdout); |
| 663 | size_t cnt; |
| 664 | for (cnt = 0; cnt < (size_t) MIN (info->cur - info->last_end, 8); ++cnt) |
| 665 | printf (" %02" PRIx8, info->last_end[cnt]); |
| 666 | if (info->bytes_color != NULL) |
| 667 | fputs_unlocked (color_off, stdout); |
| 668 | |
| 669 | printf ("%*s %.*s\n", |
| 670 | (int) (8 - cnt) * 3 + 1, "", (int) buflen, buf); |
| 671 | |
| 672 | info->addr += cnt; |
| 673 | |
| 674 | /* We limit the number of bytes printed before the mnemonic to 8. |
| 675 | Print the rest on a separate, following line. */ |
| 676 | if (info->cur - info->last_end > 8) |
| 677 | { |
| 678 | if (info->address_color != NULL) |
| 679 | printf ("%s%8" PRIx64 "%s: ", |
| 680 | info->address_color, (uint64_t) info->addr, color_off); |
| 681 | else |
| 682 | printf ("%8" PRIx64 ": ", (uint64_t) info->addr); |
| 683 | |
| 684 | if (info->bytes_color != NULL) |
| 685 | fputs_unlocked (info->bytes_color, stdout); |
| 686 | for (; cnt < (size_t) (info->cur - info->last_end); ++cnt) |
| 687 | printf (" %02" PRIx8, info->last_end[cnt]); |
| 688 | if (info->bytes_color != NULL) |
| 689 | fputs_unlocked (color_off, stdout); |
| 690 | putchar_unlocked ('\n'); |
| 691 | info->addr += info->cur - info->last_end - 8; |
| 692 | } |
| 693 | |
| 694 | info->last_end = info->cur; |
| 695 | |
| 696 | return 0; |
| 697 | } |
| 698 | |
| 699 | |
| 700 | static int |
| 701 | show_disasm (Ebl *ebl, const char *fname, uint32_t shstrndx) |
| 702 | { |
| 703 | DisasmCtx_t *ctx = disasm_begin (ebl, ebl->elf, NULL /* XXX TODO */); |
| 704 | if (ctx == NULL) |
| 705 | error (EXIT_FAILURE, 0, gettext ("cannot disassemble")); |
| 706 | |
| 707 | Elf_Scn *scn = NULL; |
| 708 | while ((scn = elf_nextscn (ebl->elf, scn)) != NULL) |
| 709 | { |
| 710 | GElf_Shdr shdr_mem; |
| 711 | GElf_Shdr *shdr = gelf_getshdr (scn, &shdr_mem); |
| 712 | |
| 713 | if (shdr == NULL) |
| 714 | INTERNAL_ERROR (fname); |
| 715 | |
| 716 | if (shdr->sh_type == SHT_PROGBITS && shdr->sh_size > 0 |
| 717 | && (shdr->sh_flags & SHF_EXECINSTR) != 0) |
| 718 | { |
| 719 | if (! section_match (ebl->elf, elf_ndxscn (scn), shdr, shstrndx)) |
| 720 | continue; |
| 721 | |
| 722 | Elf_Data *data = elf_getdata (scn, NULL); |
| 723 | if (data == NULL) |
| 724 | continue; |
| 725 | |
| 726 | printf ("Disassembly of section %s:\n\n", |
| 727 | elf_strptr (ebl->elf, shstrndx, shdr->sh_name)); |
| 728 | |
| 729 | struct disasm_info info; |
| 730 | info.addr = shdr->sh_addr; |
| 731 | info.last_end = info.cur = data->d_buf; |
| 732 | char *fmt; |
| 733 | if (color_mode) |
| 734 | { |
| 735 | info.address_color = color_address; |
| 736 | info.bytes_color = color_bytes; |
| 737 | |
| 738 | if (asprintf (&fmt, "%s%%7m %s%%.1o,%s%%.2o,%s%%.3o%%34a %s%%l", |
| 739 | color_mnemonic ?: "", |
| 740 | color_operand1 ?: "", |
| 741 | color_operand2 ?: "", |
| 742 | color_operand3 ?: "", |
| 743 | color_label ?: "") < 0) |
| 744 | error (EXIT_FAILURE, errno, _("cannot allocate memory")); |
| 745 | } |
| 746 | else |
| 747 | { |
| 748 | info.address_color = info.bytes_color = NULL; |
| 749 | |
| 750 | fmt = "%7m %.1o,%.2o,%.3o%34a %l"; |
| 751 | } |
| 752 | |
| 753 | disasm_cb (ctx, &info.cur, info.cur + data->d_size, info.addr, |
| 754 | fmt, disasm_output, &info, NULL /* XXX */); |
| 755 | |
| 756 | if (color_mode) |
| 757 | free (fmt); |
| 758 | } |
| 759 | } |
| 760 | |
| 761 | (void) disasm_end (ctx); |
| 762 | |
| 763 | return 0; |
| 764 | } |
| 765 | |
| 766 | |
| 767 | static int |
| 768 | handle_elf (Elf *elf, const char *prefix, const char *fname, |
| 769 | const char *suffix) |
| 770 | { |
| 771 | |
| 772 | /* Get the backend for this object file type. */ |
| 773 | Ebl *ebl = ebl_openbackend (elf); |
| 774 | |
| 775 | printf ("%s: elf%d-%s\n\n", |
| 776 | fname, gelf_getclass (elf) == ELFCLASS32 ? 32 : 64, |
| 777 | ebl_backend_name (ebl)); |
| 778 | |
| 779 | /* Create the full name of the file. */ |
| 780 | size_t prefix_len = prefix == NULL ? 0 : strlen (prefix); |
| 781 | size_t suffix_len = suffix == NULL ? 0 : strlen (suffix); |
| 782 | size_t fname_len = strlen (fname) + 1; |
| 783 | char fullname[prefix_len + 1 + fname_len + suffix_len]; |
| 784 | char *cp = fullname; |
| 785 | if (prefix != NULL) |
| 786 | cp = mempcpy (cp, prefix, prefix_len); |
| 787 | cp = mempcpy (cp, fname, fname_len); |
| 788 | if (suffix != NULL) |
| 789 | memcpy (cp - 1, suffix, suffix_len + 1); |
| 790 | |
| 791 | /* Get the section header string table index. */ |
| 792 | size_t shstrndx; |
| 793 | if (elf_getshdrstrndx (ebl->elf, &shstrndx) < 0) |
| 794 | error (EXIT_FAILURE, 0, |
| 795 | gettext ("cannot get section header string table index")); |
| 796 | |
| 797 | int result = 0; |
| 798 | if (print_disasm) |
| 799 | result = show_disasm (ebl, fullname, shstrndx); |
| 800 | if (print_relocs && !print_disasm) |
| 801 | result = show_relocs (ebl, fullname, shstrndx); |
| 802 | if (print_full_content) |
| 803 | result = show_full_content (ebl, fullname, shstrndx); |
| 804 | |
| 805 | /* Close the ELF backend library descriptor. */ |
| 806 | ebl_closebackend (ebl); |
| 807 | |
| 808 | return result; |
| 809 | } |
| 810 | |
| 811 | |
| 812 | #include "debugpred.h" |