1 /* Generic symbol file reading for the GNU debugger, GDB. 2 3 Copyright (C) 1990-2012 Free Software Foundation, Inc. 4 5 Contributed by Cygnus Support, using pieces from other GDB modules. 6 7 This file is part of GDB. 8 9 This program is free software; you can redistribute it and/or modify 10 it under the terms of the GNU General Public License as published by 11 the Free Software Foundation; either version 3 of the License, or 12 (at your option) any later version. 13 14 This program is distributed in the hope that it will be useful, 15 but WITHOUT ANY WARRANTY; without even the implied warranty of 16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 GNU General Public License for more details. 18 19 You should have received a copy of the GNU General Public License 20 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 21 22 #include "defs.h" 23 #include "arch-utils.h" 24 #include "bfdlink.h" 25 #include "symtab.h" 26 #include "gdbtypes.h" 27 #include "gdbcore.h" 28 #include "frame.h" 29 #include "target.h" 30 #include "value.h" 31 #include "symfile.h" 32 #include "objfiles.h" 33 #include "source.h" 34 #include "gdbcmd.h" 35 #include "breakpoint.h" 36 #include "language.h" 37 #include "complaints.h" 38 #include "demangle.h" 39 #include "inferior.h" 40 #include "regcache.h" 41 #include "filenames.h" /* for DOSish file names */ 42 #include "gdb-stabs.h" 43 #include "gdb_obstack.h" 44 #include "completer.h" 45 #include "bcache.h" 46 #include "hashtab.h" 47 #include "readline/readline.h" 48 #include "gdb_assert.h" 49 #include "block.h" 50 #include "observer.h" 51 #include "exec.h" 52 #include "parser-defs.h" 53 #include "varobj.h" 54 #include "elf-bfd.h" 55 #include "solib.h" 56 #include "remote.h" 57 #include "stack.h" 58 59 #include <sys/types.h> 60 #include <fcntl.h> 61 #include "gdb_string.h" 62 #include "gdb_stat.h" 63 #include <ctype.h> 64 #include <time.h> 65 #include <sys/time.h> 66 67 #include "psymtab.h" 68 69 int (*deprecated_ui_load_progress_hook) (const char *section, 70 unsigned long num); 71 void (*deprecated_show_load_progress) (const char *section, 72 unsigned long section_sent, 73 unsigned long section_size, 74 unsigned long total_sent, 75 unsigned long total_size); 76 void (*deprecated_pre_add_symbol_hook) (const char *); 77 void (*deprecated_post_add_symbol_hook) (void); 78 79 static void clear_symtab_users_cleanup (void *ignore); 80 81 /* Global variables owned by this file. */ 82 int readnow_symbol_files; /* Read full symbols immediately. */ 83 84 /* External variables and functions referenced. */ 85 86 extern void report_transfer_performance (unsigned long, time_t, time_t); 87 88 /* Functions this file defines. */ 89 90 static void load_command (char *, int); 91 92 static void symbol_file_add_main_1 (char *args, int from_tty, int flags); 93 94 static void add_symbol_file_command (char *, int); 95 96 bfd *symfile_bfd_open (char *); 97 98 int get_section_index (struct objfile *, char *); 99 100 static const struct sym_fns *find_sym_fns (bfd *); 101 102 static void decrement_reading_symtab (void *); 103 104 static void overlay_invalidate_all (void); 105 106 void list_overlays_command (char *, int); 107 108 void map_overlay_command (char *, int); 109 110 void unmap_overlay_command (char *, int); 111 112 static void overlay_auto_command (char *, int); 113 114 static void overlay_manual_command (char *, int); 115 116 static void overlay_off_command (char *, int); 117 118 static void overlay_load_command (char *, int); 119 120 static void overlay_command (char *, int); 121 122 static void simple_free_overlay_table (void); 123 124 static void read_target_long_array (CORE_ADDR, unsigned int *, int, int, 125 enum bfd_endian); 126 127 static int simple_read_overlay_table (void); 128 129 static int simple_overlay_update_1 (struct obj_section *); 130 131 static void add_filename_language (char *ext, enum language lang); 132 133 static void info_ext_lang_command (char *args, int from_tty); 134 135 static void init_filename_language_table (void); 136 137 static void symfile_find_segment_sections (struct objfile *objfile); 138 139 void _initialize_symfile (void); 140 141 /* List of all available sym_fns. On gdb startup, each object file reader 142 calls add_symtab_fns() to register information on each format it is 143 prepared to read. */ 144 145 typedef const struct sym_fns *sym_fns_ptr; 146 DEF_VEC_P (sym_fns_ptr); 147 148 static VEC (sym_fns_ptr) *symtab_fns = NULL; 149 150 /* Flag for whether user will be reloading symbols multiple times. 151 Defaults to ON for VxWorks, otherwise OFF. */ 152 153 #ifdef SYMBOL_RELOADING_DEFAULT 154 int symbol_reloading = SYMBOL_RELOADING_DEFAULT; 155 #else 156 int symbol_reloading = 0; 157 #endif 158 static void 159 show_symbol_reloading (struct ui_file *file, int from_tty, 160 struct cmd_list_element *c, const char *value) 161 { 162 fprintf_filtered (file, _("Dynamic symbol table reloading " 163 "multiple times in one run is %s.\n"), 164 value); 165 } 166 167 /* If non-zero, shared library symbols will be added automatically 168 when the inferior is created, new libraries are loaded, or when 169 attaching to the inferior. This is almost always what users will 170 want to have happen; but for very large programs, the startup time 171 will be excessive, and so if this is a problem, the user can clear 172 this flag and then add the shared library symbols as needed. Note 173 that there is a potential for confusion, since if the shared 174 library symbols are not loaded, commands like "info fun" will *not* 175 report all the functions that are actually present. */ 176 177 int auto_solib_add = 1; 178 179 180 /* Make a null terminated copy of the string at PTR with SIZE characters in 181 the obstack pointed to by OBSTACKP . Returns the address of the copy. 182 Note that the string at PTR does not have to be null terminated, I.e. it 183 may be part of a larger string and we are only saving a substring. */ 184 185 char * 186 obsavestring (const char *ptr, int size, struct obstack *obstackp) 187 { 188 char *p = (char *) obstack_alloc (obstackp, size + 1); 189 /* Open-coded memcpy--saves function call time. These strings are usually 190 short. FIXME: Is this really still true with a compiler that can 191 inline memcpy? */ 192 { 193 const char *p1 = ptr; 194 char *p2 = p; 195 const char *end = ptr + size; 196 197 while (p1 != end) 198 *p2++ = *p1++; 199 } 200 p[size] = 0; 201 return p; 202 } 203 204 /* Concatenate NULL terminated variable argument list of `const char *' 205 strings; return the new string. Space is found in the OBSTACKP. 206 Argument list must be terminated by a sentinel expression `(char *) 207 NULL'. */ 208 209 char * 210 obconcat (struct obstack *obstackp, ...) 211 { 212 va_list ap; 213 214 va_start (ap, obstackp); 215 for (;;) 216 { 217 const char *s = va_arg (ap, const char *); 218 219 if (s == NULL) 220 break; 221 222 obstack_grow_str (obstackp, s); 223 } 224 va_end (ap); 225 obstack_1grow (obstackp, 0); 226 227 return obstack_finish (obstackp); 228 } 229 230 /* True if we are reading a symbol table. */ 231 232 int currently_reading_symtab = 0; 233 234 static void 235 decrement_reading_symtab (void *dummy) 236 { 237 currently_reading_symtab--; 238 } 239 240 /* Increment currently_reading_symtab and return a cleanup that can be 241 used to decrement it. */ 242 struct cleanup * 243 increment_reading_symtab (void) 244 { 245 ++currently_reading_symtab; 246 return make_cleanup (decrement_reading_symtab, NULL); 247 } 248 249 /* Remember the lowest-addressed loadable section we've seen. 250 This function is called via bfd_map_over_sections. 251 252 In case of equal vmas, the section with the largest size becomes the 253 lowest-addressed loadable section. 254 255 If the vmas and sizes are equal, the last section is considered the 256 lowest-addressed loadable section. */ 257 258 void 259 find_lowest_section (bfd *abfd, asection *sect, void *obj) 260 { 261 asection **lowest = (asection **) obj; 262 263 if (0 == (bfd_get_section_flags (abfd, sect) & (SEC_ALLOC | SEC_LOAD))) 264 return; 265 if (!*lowest) 266 *lowest = sect; /* First loadable section */ 267 else if (bfd_section_vma (abfd, *lowest) > bfd_section_vma (abfd, sect)) 268 *lowest = sect; /* A lower loadable section */ 269 else if (bfd_section_vma (abfd, *lowest) == bfd_section_vma (abfd, sect) 270 && (bfd_section_size (abfd, (*lowest)) 271 <= bfd_section_size (abfd, sect))) 272 *lowest = sect; 273 } 274 275 /* Create a new section_addr_info, with room for NUM_SECTIONS. */ 276 277 struct section_addr_info * 278 alloc_section_addr_info (size_t num_sections) 279 { 280 struct section_addr_info *sap; 281 size_t size; 282 283 size = (sizeof (struct section_addr_info) 284 + sizeof (struct other_sections) * (num_sections - 1)); 285 sap = (struct section_addr_info *) xmalloc (size); 286 memset (sap, 0, size); 287 sap->num_sections = num_sections; 288 289 return sap; 290 } 291 292 /* Build (allocate and populate) a section_addr_info struct from 293 an existing section table. */ 294 295 extern struct section_addr_info * 296 build_section_addr_info_from_section_table (const struct target_section *start, 297 const struct target_section *end) 298 { 299 struct section_addr_info *sap; 300 const struct target_section *stp; 301 int oidx; 302 303 sap = alloc_section_addr_info (end - start); 304 305 for (stp = start, oidx = 0; stp != end; stp++) 306 { 307 if (bfd_get_section_flags (stp->bfd, 308 stp->the_bfd_section) & (SEC_ALLOC | SEC_LOAD) 309 && oidx < end - start) 310 { 311 sap->other[oidx].addr = stp->addr; 312 sap->other[oidx].name 313 = xstrdup (bfd_section_name (stp->bfd, stp->the_bfd_section)); 314 sap->other[oidx].sectindex = stp->the_bfd_section->index; 315 oidx++; 316 } 317 } 318 319 return sap; 320 } 321 322 /* Create a section_addr_info from section offsets in ABFD. */ 323 324 static struct section_addr_info * 325 build_section_addr_info_from_bfd (bfd *abfd) 326 { 327 struct section_addr_info *sap; 328 int i; 329 struct bfd_section *sec; 330 331 sap = alloc_section_addr_info (bfd_count_sections (abfd)); 332 for (i = 0, sec = abfd->sections; sec != NULL; sec = sec->next) 333 if (bfd_get_section_flags (abfd, sec) & (SEC_ALLOC | SEC_LOAD)) 334 { 335 sap->other[i].addr = bfd_get_section_vma (abfd, sec); 336 sap->other[i].name = xstrdup (bfd_get_section_name (abfd, sec)); 337 sap->other[i].sectindex = sec->index; 338 i++; 339 } 340 return sap; 341 } 342 343 /* Create a section_addr_info from section offsets in OBJFILE. */ 344 345 struct section_addr_info * 346 build_section_addr_info_from_objfile (const struct objfile *objfile) 347 { 348 struct section_addr_info *sap; 349 int i; 350 351 /* Before reread_symbols gets rewritten it is not safe to call: 352 gdb_assert (objfile->num_sections == bfd_count_sections (objfile->obfd)); 353 */ 354 sap = build_section_addr_info_from_bfd (objfile->obfd); 355 for (i = 0; i < sap->num_sections && sap->other[i].name; i++) 356 { 357 int sectindex = sap->other[i].sectindex; 358 359 sap->other[i].addr += objfile->section_offsets->offsets[sectindex]; 360 } 361 return sap; 362 } 363 364 /* Free all memory allocated by build_section_addr_info_from_section_table. */ 365 366 extern void 367 free_section_addr_info (struct section_addr_info *sap) 368 { 369 int idx; 370 371 for (idx = 0; idx < sap->num_sections; idx++) 372 if (sap->other[idx].name) 373 xfree (sap->other[idx].name); 374 xfree (sap); 375 } 376 377 378 /* Initialize OBJFILE's sect_index_* members. */ 379 static void 380 init_objfile_sect_indices (struct objfile *objfile) 381 { 382 asection *sect; 383 int i; 384 385 sect = bfd_get_section_by_name (objfile->obfd, ".text"); 386 if (sect) 387 objfile->sect_index_text = sect->index; 388 389 sect = bfd_get_section_by_name (objfile->obfd, ".data"); 390 if (sect) 391 objfile->sect_index_data = sect->index; 392 393 sect = bfd_get_section_by_name (objfile->obfd, ".bss"); 394 if (sect) 395 objfile->sect_index_bss = sect->index; 396 397 sect = bfd_get_section_by_name (objfile->obfd, ".rodata"); 398 if (sect) 399 objfile->sect_index_rodata = sect->index; 400 401 /* This is where things get really weird... We MUST have valid 402 indices for the various sect_index_* members or gdb will abort. 403 So if for example, there is no ".text" section, we have to 404 accomodate that. First, check for a file with the standard 405 one or two segments. */ 406 407 symfile_find_segment_sections (objfile); 408 409 /* Except when explicitly adding symbol files at some address, 410 section_offsets contains nothing but zeros, so it doesn't matter 411 which slot in section_offsets the individual sect_index_* members 412 index into. So if they are all zero, it is safe to just point 413 all the currently uninitialized indices to the first slot. But 414 beware: if this is the main executable, it may be relocated 415 later, e.g. by the remote qOffsets packet, and then this will 416 be wrong! That's why we try segments first. */ 417 418 for (i = 0; i < objfile->num_sections; i++) 419 { 420 if (ANOFFSET (objfile->section_offsets, i) != 0) 421 { 422 break; 423 } 424 } 425 if (i == objfile->num_sections) 426 { 427 if (objfile->sect_index_text == -1) 428 objfile->sect_index_text = 0; 429 if (objfile->sect_index_data == -1) 430 objfile->sect_index_data = 0; 431 if (objfile->sect_index_bss == -1) 432 objfile->sect_index_bss = 0; 433 if (objfile->sect_index_rodata == -1) 434 objfile->sect_index_rodata = 0; 435 } 436 } 437 438 /* The arguments to place_section. */ 439 440 struct place_section_arg 441 { 442 struct section_offsets *offsets; 443 CORE_ADDR lowest; 444 }; 445 446 /* Find a unique offset to use for loadable section SECT if 447 the user did not provide an offset. */ 448 449 static void 450 place_section (bfd *abfd, asection *sect, void *obj) 451 { 452 struct place_section_arg *arg = obj; 453 CORE_ADDR *offsets = arg->offsets->offsets, start_addr; 454 int done; 455 ULONGEST align = ((ULONGEST) 1) << bfd_get_section_alignment (abfd, sect); 456 457 /* We are only interested in allocated sections. */ 458 if ((bfd_get_section_flags (abfd, sect) & SEC_ALLOC) == 0) 459 return; 460 461 /* If the user specified an offset, honor it. */ 462 if (offsets[sect->index] != 0) 463 return; 464 465 /* Otherwise, let's try to find a place for the section. */ 466 start_addr = (arg->lowest + align - 1) & -align; 467 468 do { 469 asection *cur_sec; 470 471 done = 1; 472 473 for (cur_sec = abfd->sections; cur_sec != NULL; cur_sec = cur_sec->next) 474 { 475 int indx = cur_sec->index; 476 477 /* We don't need to compare against ourself. */ 478 if (cur_sec == sect) 479 continue; 480 481 /* We can only conflict with allocated sections. */ 482 if ((bfd_get_section_flags (abfd, cur_sec) & SEC_ALLOC) == 0) 483 continue; 484 485 /* If the section offset is 0, either the section has not been placed 486 yet, or it was the lowest section placed (in which case LOWEST 487 will be past its end). */ 488 if (offsets[indx] == 0) 489 continue; 490 491 /* If this section would overlap us, then we must move up. */ 492 if (start_addr + bfd_get_section_size (sect) > offsets[indx] 493 && start_addr < offsets[indx] + bfd_get_section_size (cur_sec)) 494 { 495 start_addr = offsets[indx] + bfd_get_section_size (cur_sec); 496 start_addr = (start_addr + align - 1) & -align; 497 done = 0; 498 break; 499 } 500 501 /* Otherwise, we appear to be OK. So far. */ 502 } 503 } 504 while (!done); 505 506 offsets[sect->index] = start_addr; 507 arg->lowest = start_addr + bfd_get_section_size (sect); 508 } 509 510 /* Store struct section_addr_info as prepared (made relative and with SECTINDEX 511 filled-in) by addr_info_make_relative into SECTION_OFFSETS of NUM_SECTIONS 512 entries. */ 513 514 void 515 relative_addr_info_to_section_offsets (struct section_offsets *section_offsets, 516 int num_sections, 517 struct section_addr_info *addrs) 518 { 519 int i; 520 521 memset (section_offsets, 0, SIZEOF_N_SECTION_OFFSETS (num_sections)); 522 523 /* Now calculate offsets for section that were specified by the caller. */ 524 for (i = 0; i < addrs->num_sections && addrs->other[i].name; i++) 525 { 526 struct other_sections *osp; 527 528 osp = &addrs->other[i]; 529 if (osp->sectindex == -1) 530 continue; 531 532 /* Record all sections in offsets. */ 533 /* The section_offsets in the objfile are here filled in using 534 the BFD index. */ 535 section_offsets->offsets[osp->sectindex] = osp->addr; 536 } 537 } 538 539 /* Transform section name S for a name comparison. prelink can split section 540 `.bss' into two sections `.dynbss' and `.bss' (in this order). Similarly 541 prelink can split `.sbss' into `.sdynbss' and `.sbss'. Use virtual address 542 of the new `.dynbss' (`.sdynbss') section as the adjacent new `.bss' 543 (`.sbss') section has invalid (increased) virtual address. */ 544 545 static const char * 546 addr_section_name (const char *s) 547 { 548 if (strcmp (s, ".dynbss") == 0) 549 return ".bss"; 550 if (strcmp (s, ".sdynbss") == 0) 551 return ".sbss"; 552 553 return s; 554 } 555 556 /* qsort comparator for addrs_section_sort. Sort entries in ascending order by 557 their (name, sectindex) pair. sectindex makes the sort by name stable. */ 558 559 static int 560 addrs_section_compar (const void *ap, const void *bp) 561 { 562 const struct other_sections *a = *((struct other_sections **) ap); 563 const struct other_sections *b = *((struct other_sections **) bp); 564 int retval, a_idx, b_idx; 565 566 retval = strcmp (addr_section_name (a->name), addr_section_name (b->name)); 567 if (retval) 568 return retval; 569 570 return a->sectindex - b->sectindex; 571 } 572 573 /* Provide sorted array of pointers to sections of ADDRS. The array is 574 terminated by NULL. Caller is responsible to call xfree for it. */ 575 576 static struct other_sections ** 577 addrs_section_sort (struct section_addr_info *addrs) 578 { 579 struct other_sections **array; 580 int i; 581 582 /* `+ 1' for the NULL terminator. */ 583 array = xmalloc (sizeof (*array) * (addrs->num_sections + 1)); 584 for (i = 0; i < addrs->num_sections && addrs->other[i].name; i++) 585 array[i] = &addrs->other[i]; 586 array[i] = NULL; 587 588 qsort (array, i, sizeof (*array), addrs_section_compar); 589 590 return array; 591 } 592 593 /* Relativize absolute addresses in ADDRS into offsets based on ABFD. Fill-in 594 also SECTINDEXes specific to ABFD there. This function can be used to 595 rebase ADDRS to start referencing different BFD than before. */ 596 597 void 598 addr_info_make_relative (struct section_addr_info *addrs, bfd *abfd) 599 { 600 asection *lower_sect; 601 CORE_ADDR lower_offset; 602 int i; 603 struct cleanup *my_cleanup; 604 struct section_addr_info *abfd_addrs; 605 struct other_sections **addrs_sorted, **abfd_addrs_sorted; 606 struct other_sections **addrs_to_abfd_addrs; 607 608 /* Find lowest loadable section to be used as starting point for 609 continguous sections. */ 610 lower_sect = NULL; 611 bfd_map_over_sections (abfd, find_lowest_section, &lower_sect); 612 if (lower_sect == NULL) 613 { 614 warning (_("no loadable sections found in added symbol-file %s"), 615 bfd_get_filename (abfd)); 616 lower_offset = 0; 617 } 618 else 619 lower_offset = bfd_section_vma (bfd_get_filename (abfd), lower_sect); 620 621 /* Create ADDRS_TO_ABFD_ADDRS array to map the sections in ADDRS to sections 622 in ABFD. Section names are not unique - there can be multiple sections of 623 the same name. Also the sections of the same name do not have to be 624 adjacent to each other. Some sections may be present only in one of the 625 files. Even sections present in both files do not have to be in the same 626 order. 627 628 Use stable sort by name for the sections in both files. Then linearly 629 scan both lists matching as most of the entries as possible. */ 630 631 addrs_sorted = addrs_section_sort (addrs); 632 my_cleanup = make_cleanup (xfree, addrs_sorted); 633 634 abfd_addrs = build_section_addr_info_from_bfd (abfd); 635 make_cleanup_free_section_addr_info (abfd_addrs); 636 abfd_addrs_sorted = addrs_section_sort (abfd_addrs); 637 make_cleanup (xfree, abfd_addrs_sorted); 638 639 /* Now create ADDRS_TO_ABFD_ADDRS from ADDRS_SORTED and 640 ABFD_ADDRS_SORTED. */ 641 642 addrs_to_abfd_addrs = xzalloc (sizeof (*addrs_to_abfd_addrs) 643 * addrs->num_sections); 644 make_cleanup (xfree, addrs_to_abfd_addrs); 645 646 while (*addrs_sorted) 647 { 648 const char *sect_name = addr_section_name ((*addrs_sorted)->name); 649 650 while (*abfd_addrs_sorted 651 && strcmp (addr_section_name ((*abfd_addrs_sorted)->name), 652 sect_name) < 0) 653 abfd_addrs_sorted++; 654 655 if (*abfd_addrs_sorted 656 && strcmp (addr_section_name ((*abfd_addrs_sorted)->name), 657 sect_name) == 0) 658 { 659 int index_in_addrs; 660 661 /* Make the found item directly addressable from ADDRS. */ 662 index_in_addrs = *addrs_sorted - addrs->other; 663 gdb_assert (addrs_to_abfd_addrs[index_in_addrs] == NULL); 664 addrs_to_abfd_addrs[index_in_addrs] = *abfd_addrs_sorted; 665 666 /* Never use the same ABFD entry twice. */ 667 abfd_addrs_sorted++; 668 } 669 670 addrs_sorted++; 671 } 672 673 /* Calculate offsets for the loadable sections. 674 FIXME! Sections must be in order of increasing loadable section 675 so that contiguous sections can use the lower-offset!!! 676 677 Adjust offsets if the segments are not contiguous. 678 If the section is contiguous, its offset should be set to 679 the offset of the highest loadable section lower than it 680 (the loadable section directly below it in memory). 681 this_offset = lower_offset = lower_addr - lower_orig_addr */ 682 683 for (i = 0; i < addrs->num_sections && addrs->other[i].name; i++) 684 { 685 struct other_sections *sect = addrs_to_abfd_addrs[i]; 686 687 if (sect) 688 { 689 /* This is the index used by BFD. */ 690 addrs->other[i].sectindex = sect->sectindex; 691 692 if (addrs->other[i].addr != 0) 693 { 694 addrs->other[i].addr -= sect->addr; 695 lower_offset = addrs->other[i].addr; 696 } 697 else 698 addrs->other[i].addr = lower_offset; 699 } 700 else 701 { 702 /* addr_section_name transformation is not used for SECT_NAME. */ 703 const char *sect_name = addrs->other[i].name; 704 705 /* This section does not exist in ABFD, which is normally 706 unexpected and we want to issue a warning. 707 708 However, the ELF prelinker does create a few sections which are 709 marked in the main executable as loadable (they are loaded in 710 memory from the DYNAMIC segment) and yet are not present in 711 separate debug info files. This is fine, and should not cause 712 a warning. Shared libraries contain just the section 713 ".gnu.liblist" but it is not marked as loadable there. There is 714 no other way to identify them than by their name as the sections 715 created by prelink have no special flags. 716 717 For the sections `.bss' and `.sbss' see addr_section_name. */ 718 719 if (!(strcmp (sect_name, ".gnu.liblist") == 0 720 || strcmp (sect_name, ".gnu.conflict") == 0 721 || (strcmp (sect_name, ".bss") == 0 722 && i > 0 723 && strcmp (addrs->other[i - 1].name, ".dynbss") == 0 724 && addrs_to_abfd_addrs[i - 1] != NULL) 725 || (strcmp (sect_name, ".sbss") == 0 726 && i > 0 727 && strcmp (addrs->other[i - 1].name, ".sdynbss") == 0 728 && addrs_to_abfd_addrs[i - 1] != NULL))) 729 warning (_("section %s not found in %s"), sect_name, 730 bfd_get_filename (abfd)); 731 732 addrs->other[i].addr = 0; 733 addrs->other[i].sectindex = -1; 734 } 735 } 736 737 do_cleanups (my_cleanup); 738 } 739 740 /* Parse the user's idea of an offset for dynamic linking, into our idea 741 of how to represent it for fast symbol reading. This is the default 742 version of the sym_fns.sym_offsets function for symbol readers that 743 don't need to do anything special. It allocates a section_offsets table 744 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */ 745 746 void 747 default_symfile_offsets (struct objfile *objfile, 748 struct section_addr_info *addrs) 749 { 750 objfile->num_sections = bfd_count_sections (objfile->obfd); 751 objfile->section_offsets = (struct section_offsets *) 752 obstack_alloc (&objfile->objfile_obstack, 753 SIZEOF_N_SECTION_OFFSETS (objfile->num_sections)); 754 relative_addr_info_to_section_offsets (objfile->section_offsets, 755 objfile->num_sections, addrs); 756 757 /* For relocatable files, all loadable sections will start at zero. 758 The zero is meaningless, so try to pick arbitrary addresses such 759 that no loadable sections overlap. This algorithm is quadratic, 760 but the number of sections in a single object file is generally 761 small. */ 762 if ((bfd_get_file_flags (objfile->obfd) & (EXEC_P | DYNAMIC)) == 0) 763 { 764 struct place_section_arg arg; 765 bfd *abfd = objfile->obfd; 766 asection *cur_sec; 767 768 for (cur_sec = abfd->sections; cur_sec != NULL; cur_sec = cur_sec->next) 769 /* We do not expect this to happen; just skip this step if the 770 relocatable file has a section with an assigned VMA. */ 771 if (bfd_section_vma (abfd, cur_sec) != 0) 772 break; 773 774 if (cur_sec == NULL) 775 { 776 CORE_ADDR *offsets = objfile->section_offsets->offsets; 777 778 /* Pick non-overlapping offsets for sections the user did not 779 place explicitly. */ 780 arg.offsets = objfile->section_offsets; 781 arg.lowest = 0; 782 bfd_map_over_sections (objfile->obfd, place_section, &arg); 783 784 /* Correctly filling in the section offsets is not quite 785 enough. Relocatable files have two properties that 786 (most) shared objects do not: 787 788 - Their debug information will contain relocations. Some 789 shared libraries do also, but many do not, so this can not 790 be assumed. 791 792 - If there are multiple code sections they will be loaded 793 at different relative addresses in memory than they are 794 in the objfile, since all sections in the file will start 795 at address zero. 796 797 Because GDB has very limited ability to map from an 798 address in debug info to the correct code section, 799 it relies on adding SECT_OFF_TEXT to things which might be 800 code. If we clear all the section offsets, and set the 801 section VMAs instead, then symfile_relocate_debug_section 802 will return meaningful debug information pointing at the 803 correct sections. 804 805 GDB has too many different data structures for section 806 addresses - a bfd, objfile, and so_list all have section 807 tables, as does exec_ops. Some of these could probably 808 be eliminated. */ 809 810 for (cur_sec = abfd->sections; cur_sec != NULL; 811 cur_sec = cur_sec->next) 812 { 813 if ((bfd_get_section_flags (abfd, cur_sec) & SEC_ALLOC) == 0) 814 continue; 815 816 bfd_set_section_vma (abfd, cur_sec, offsets[cur_sec->index]); 817 exec_set_section_address (bfd_get_filename (abfd), 818 cur_sec->index, 819 offsets[cur_sec->index]); 820 offsets[cur_sec->index] = 0; 821 } 822 } 823 } 824 825 /* Remember the bfd indexes for the .text, .data, .bss and 826 .rodata sections. */ 827 init_objfile_sect_indices (objfile); 828 } 829 830 831 /* Divide the file into segments, which are individual relocatable units. 832 This is the default version of the sym_fns.sym_segments function for 833 symbol readers that do not have an explicit representation of segments. 834 It assumes that object files do not have segments, and fully linked 835 files have a single segment. */ 836 837 struct symfile_segment_data * 838 default_symfile_segments (bfd *abfd) 839 { 840 int num_sections, i; 841 asection *sect; 842 struct symfile_segment_data *data; 843 CORE_ADDR low, high; 844 845 /* Relocatable files contain enough information to position each 846 loadable section independently; they should not be relocated 847 in segments. */ 848 if ((bfd_get_file_flags (abfd) & (EXEC_P | DYNAMIC)) == 0) 849 return NULL; 850 851 /* Make sure there is at least one loadable section in the file. */ 852 for (sect = abfd->sections; sect != NULL; sect = sect->next) 853 { 854 if ((bfd_get_section_flags (abfd, sect) & SEC_ALLOC) == 0) 855 continue; 856 857 break; 858 } 859 if (sect == NULL) 860 return NULL; 861 862 low = bfd_get_section_vma (abfd, sect); 863 high = low + bfd_get_section_size (sect); 864 865 data = XZALLOC (struct symfile_segment_data); 866 data->num_segments = 1; 867 data->segment_bases = XCALLOC (1, CORE_ADDR); 868 data->segment_sizes = XCALLOC (1, CORE_ADDR); 869 870 num_sections = bfd_count_sections (abfd); 871 data->segment_info = XCALLOC (num_sections, int); 872 873 for (i = 0, sect = abfd->sections; sect != NULL; i++, sect = sect->next) 874 { 875 CORE_ADDR vma; 876 877 if ((bfd_get_section_flags (abfd, sect) & SEC_ALLOC) == 0) 878 continue; 879 880 vma = bfd_get_section_vma (abfd, sect); 881 if (vma < low) 882 low = vma; 883 if (vma + bfd_get_section_size (sect) > high) 884 high = vma + bfd_get_section_size (sect); 885 886 data->segment_info[i] = 1; 887 } 888 889 data->segment_bases[0] = low; 890 data->segment_sizes[0] = high - low; 891 892 return data; 893 } 894 895 /* Process a symbol file, as either the main file or as a dynamically 896 loaded file. 897 898 OBJFILE is where the symbols are to be read from. 899 900 ADDRS is the list of section load addresses. If the user has given 901 an 'add-symbol-file' command, then this is the list of offsets and 902 addresses he or she provided as arguments to the command; or, if 903 we're handling a shared library, these are the actual addresses the 904 sections are loaded at, according to the inferior's dynamic linker 905 (as gleaned by GDB's shared library code). We convert each address 906 into an offset from the section VMA's as it appears in the object 907 file, and then call the file's sym_offsets function to convert this 908 into a format-specific offset table --- a `struct section_offsets'. 909 If ADDRS is non-zero, OFFSETS must be zero. 910 911 OFFSETS is a table of section offsets already in the right 912 format-specific representation. NUM_OFFSETS is the number of 913 elements present in OFFSETS->offsets. If OFFSETS is non-zero, we 914 assume this is the proper table the call to sym_offsets described 915 above would produce. Instead of calling sym_offsets, we just dump 916 it right into objfile->section_offsets. (When we're re-reading 917 symbols from an objfile, we don't have the original load address 918 list any more; all we have is the section offset table.) If 919 OFFSETS is non-zero, ADDRS must be zero. 920 921 ADD_FLAGS encodes verbosity level, whether this is main symbol or 922 an extra symbol file such as dynamically loaded code, and wether 923 breakpoint reset should be deferred. */ 924 925 void 926 syms_from_objfile (struct objfile *objfile, 927 struct section_addr_info *addrs, 928 struct section_offsets *offsets, 929 int num_offsets, 930 int add_flags) 931 { 932 struct section_addr_info *local_addr = NULL; 933 struct cleanup *old_chain; 934 const int mainline = add_flags & SYMFILE_MAINLINE; 935 936 gdb_assert (! (addrs && offsets)); 937 938 init_entry_point_info (objfile); 939 objfile->sf = find_sym_fns (objfile->obfd); 940 941 if (objfile->sf == NULL) 942 return; /* No symbols. */ 943 944 /* Make sure that partially constructed symbol tables will be cleaned up 945 if an error occurs during symbol reading. */ 946 old_chain = make_cleanup_free_objfile (objfile); 947 948 /* If ADDRS and OFFSETS are both NULL, put together a dummy address 949 list. We now establish the convention that an addr of zero means 950 no load address was specified. */ 951 if (! addrs && ! offsets) 952 { 953 local_addr 954 = alloc_section_addr_info (bfd_count_sections (objfile->obfd)); 955 make_cleanup (xfree, local_addr); 956 addrs = local_addr; 957 } 958 959 /* Now either addrs or offsets is non-zero. */ 960 961 if (mainline) 962 { 963 /* We will modify the main symbol table, make sure that all its users 964 will be cleaned up if an error occurs during symbol reading. */ 965 make_cleanup (clear_symtab_users_cleanup, 0 /*ignore*/); 966 967 /* Since no error yet, throw away the old symbol table. */ 968 969 if (symfile_objfile != NULL) 970 { 971 free_objfile (symfile_objfile); 972 gdb_assert (symfile_objfile == NULL); 973 } 974 975 /* Currently we keep symbols from the add-symbol-file command. 976 If the user wants to get rid of them, they should do "symbol-file" 977 without arguments first. Not sure this is the best behavior 978 (PR 2207). */ 979 980 (*objfile->sf->sym_new_init) (objfile); 981 } 982 983 /* Convert addr into an offset rather than an absolute address. 984 We find the lowest address of a loaded segment in the objfile, 985 and assume that <addr> is where that got loaded. 986 987 We no longer warn if the lowest section is not a text segment (as 988 happens for the PA64 port. */ 989 if (addrs && addrs->other[0].name) 990 addr_info_make_relative (addrs, objfile->obfd); 991 992 /* Initialize symbol reading routines for this objfile, allow complaints to 993 appear for this new file, and record how verbose to be, then do the 994 initial symbol reading for this file. */ 995 996 (*objfile->sf->sym_init) (objfile); 997 clear_complaints (&symfile_complaints, 1, add_flags & SYMFILE_VERBOSE); 998 999 if (addrs) 1000 (*objfile->sf->sym_offsets) (objfile, addrs); 1001 else 1002 { 1003 size_t size = SIZEOF_N_SECTION_OFFSETS (num_offsets); 1004 1005 /* Just copy in the offset table directly as given to us. */ 1006 objfile->num_sections = num_offsets; 1007 objfile->section_offsets 1008 = ((struct section_offsets *) 1009 obstack_alloc (&objfile->objfile_obstack, size)); 1010 memcpy (objfile->section_offsets, offsets, size); 1011 1012 init_objfile_sect_indices (objfile); 1013 } 1014 1015 (*objfile->sf->sym_read) (objfile, add_flags); 1016 1017 if ((add_flags & SYMFILE_NO_READ) == 0) 1018 require_partial_symbols (objfile, 0); 1019 1020 /* Discard cleanups as symbol reading was successful. */ 1021 1022 discard_cleanups (old_chain); 1023 xfree (local_addr); 1024 } 1025 1026 /* Perform required actions after either reading in the initial 1027 symbols for a new objfile, or mapping in the symbols from a reusable 1028 objfile. ADD_FLAGS is a bitmask of enum symfile_add_flags. */ 1029 1030 void 1031 new_symfile_objfile (struct objfile *objfile, int add_flags) 1032 { 1033 /* If this is the main symbol file we have to clean up all users of the 1034 old main symbol file. Otherwise it is sufficient to fixup all the 1035 breakpoints that may have been redefined by this symbol file. */ 1036 if (add_flags & SYMFILE_MAINLINE) 1037 { 1038 /* OK, make it the "real" symbol file. */ 1039 symfile_objfile = objfile; 1040 1041 clear_symtab_users (add_flags); 1042 } 1043 else if ((add_flags & SYMFILE_DEFER_BP_RESET) == 0) 1044 { 1045 breakpoint_re_set (); 1046 } 1047 1048 /* We're done reading the symbol file; finish off complaints. */ 1049 clear_complaints (&symfile_complaints, 0, add_flags & SYMFILE_VERBOSE); 1050 } 1051 1052 /* Process a symbol file, as either the main file or as a dynamically 1053 loaded file. 1054 1055 ABFD is a BFD already open on the file, as from symfile_bfd_open. 1056 This BFD will be closed on error, and is always consumed by this function. 1057 1058 ADD_FLAGS encodes verbosity, whether this is main symbol file or 1059 extra, such as dynamically loaded code, and what to do with breakpoins. 1060 1061 ADDRS, OFFSETS, and NUM_OFFSETS are as described for 1062 syms_from_objfile, above. 1063 ADDRS is ignored when SYMFILE_MAINLINE bit is set in ADD_FLAGS. 1064 1065 PARENT is the original objfile if ABFD is a separate debug info file. 1066 Otherwise PARENT is NULL. 1067 1068 Upon success, returns a pointer to the objfile that was added. 1069 Upon failure, jumps back to command level (never returns). */ 1070 1071 static struct objfile * 1072 symbol_file_add_with_addrs_or_offsets (bfd *abfd, 1073 int add_flags, 1074 struct section_addr_info *addrs, 1075 struct section_offsets *offsets, 1076 int num_offsets, 1077 int flags, struct objfile *parent) 1078 { 1079 struct objfile *objfile; 1080 struct cleanup *my_cleanups; 1081 const char *name = bfd_get_filename (abfd); 1082 const int from_tty = add_flags & SYMFILE_VERBOSE; 1083 const int mainline = add_flags & SYMFILE_MAINLINE; 1084 const int should_print = ((from_tty || info_verbose) 1085 && (readnow_symbol_files 1086 || (add_flags & SYMFILE_NO_READ) == 0)); 1087 1088 if (readnow_symbol_files) 1089 { 1090 flags |= OBJF_READNOW; 1091 add_flags &= ~SYMFILE_NO_READ; 1092 } 1093 1094 my_cleanups = make_cleanup_bfd_close (abfd); 1095 1096 /* Give user a chance to burp if we'd be 1097 interactively wiping out any existing symbols. */ 1098 1099 if ((have_full_symbols () || have_partial_symbols ()) 1100 && mainline 1101 && from_tty 1102 && !query (_("Load new symbol table from \"%s\"? "), name)) 1103 error (_("Not confirmed.")); 1104 1105 objfile = allocate_objfile (abfd, flags | (mainline ? OBJF_MAINLINE : 0)); 1106 discard_cleanups (my_cleanups); 1107 1108 if (parent) 1109 add_separate_debug_objfile (objfile, parent); 1110 1111 /* We either created a new mapped symbol table, mapped an existing 1112 symbol table file which has not had initial symbol reading 1113 performed, or need to read an unmapped symbol table. */ 1114 if (should_print) 1115 { 1116 if (deprecated_pre_add_symbol_hook) 1117 deprecated_pre_add_symbol_hook (name); 1118 else 1119 { 1120 printf_unfiltered (_("Reading symbols from %s..."), name); 1121 wrap_here (""); 1122 gdb_flush (gdb_stdout); 1123 } 1124 } 1125 syms_from_objfile (objfile, addrs, offsets, num_offsets, 1126 add_flags); 1127 1128 /* We now have at least a partial symbol table. Check to see if the 1129 user requested that all symbols be read on initial access via either 1130 the gdb startup command line or on a per symbol file basis. Expand 1131 all partial symbol tables for this objfile if so. */ 1132 1133 if ((flags & OBJF_READNOW)) 1134 { 1135 if (should_print) 1136 { 1137 printf_unfiltered (_("expanding to full symbols...")); 1138 wrap_here (""); 1139 gdb_flush (gdb_stdout); 1140 } 1141 1142 if (objfile->sf) 1143 objfile->sf->qf->expand_all_symtabs (objfile); 1144 } 1145 1146 if (should_print && !objfile_has_symbols (objfile)) 1147 { 1148 wrap_here (""); 1149 printf_unfiltered (_("(no debugging symbols found)...")); 1150 wrap_here (""); 1151 } 1152 1153 if (should_print) 1154 { 1155 if (deprecated_post_add_symbol_hook) 1156 deprecated_post_add_symbol_hook (); 1157 else 1158 printf_unfiltered (_("done.\n")); 1159 } 1160 1161 /* We print some messages regardless of whether 'from_tty || 1162 info_verbose' is true, so make sure they go out at the right 1163 time. */ 1164 gdb_flush (gdb_stdout); 1165 1166 if (objfile->sf == NULL) 1167 { 1168 observer_notify_new_objfile (objfile); 1169 return objfile; /* No symbols. */ 1170 } 1171 1172 new_symfile_objfile (objfile, add_flags); 1173 1174 observer_notify_new_objfile (objfile); 1175 1176 bfd_cache_close_all (); 1177 return (objfile); 1178 } 1179 1180 /* Add BFD as a separate debug file for OBJFILE. */ 1181 1182 void 1183 symbol_file_add_separate (bfd *bfd, int symfile_flags, struct objfile *objfile) 1184 { 1185 struct objfile *new_objfile; 1186 struct section_addr_info *sap; 1187 struct cleanup *my_cleanup; 1188 1189 /* Create section_addr_info. We can't directly use offsets from OBJFILE 1190 because sections of BFD may not match sections of OBJFILE and because 1191 vma may have been modified by tools such as prelink. */ 1192 sap = build_section_addr_info_from_objfile (objfile); 1193 my_cleanup = make_cleanup_free_section_addr_info (sap); 1194 1195 new_objfile = symbol_file_add_with_addrs_or_offsets 1196 (bfd, symfile_flags, 1197 sap, NULL, 0, 1198 objfile->flags & (OBJF_REORDERED | OBJF_SHARED | OBJF_READNOW 1199 | OBJF_USERLOADED), 1200 objfile); 1201 1202 do_cleanups (my_cleanup); 1203 } 1204 1205 /* Process the symbol file ABFD, as either the main file or as a 1206 dynamically loaded file. 1207 1208 See symbol_file_add_with_addrs_or_offsets's comments for 1209 details. */ 1210 struct objfile * 1211 symbol_file_add_from_bfd (bfd *abfd, int add_flags, 1212 struct section_addr_info *addrs, 1213 int flags, struct objfile *parent) 1214 { 1215 return symbol_file_add_with_addrs_or_offsets (abfd, add_flags, addrs, 0, 0, 1216 flags, parent); 1217 } 1218 1219 1220 /* Process a symbol file, as either the main file or as a dynamically 1221 loaded file. See symbol_file_add_with_addrs_or_offsets's comments 1222 for details. */ 1223 struct objfile * 1224 symbol_file_add (char *name, int add_flags, struct section_addr_info *addrs, 1225 int flags) 1226 { 1227 return symbol_file_add_from_bfd (symfile_bfd_open (name), add_flags, addrs, 1228 flags, NULL); 1229 } 1230 1231 1232 /* Call symbol_file_add() with default values and update whatever is 1233 affected by the loading of a new main(). 1234 Used when the file is supplied in the gdb command line 1235 and by some targets with special loading requirements. 1236 The auxiliary function, symbol_file_add_main_1(), has the flags 1237 argument for the switches that can only be specified in the symbol_file 1238 command itself. */ 1239 1240 void 1241 symbol_file_add_main (char *args, int from_tty) 1242 { 1243 symbol_file_add_main_1 (args, from_tty, 0); 1244 } 1245 1246 static void 1247 symbol_file_add_main_1 (char *args, int from_tty, int flags) 1248 { 1249 const int add_flags = SYMFILE_MAINLINE | (from_tty ? SYMFILE_VERBOSE : 0); 1250 symbol_file_add (args, add_flags, NULL, flags); 1251 1252 /* Getting new symbols may change our opinion about 1253 what is frameless. */ 1254 reinit_frame_cache (); 1255 1256 set_initial_language (); 1257 } 1258 1259 void 1260 symbol_file_clear (int from_tty) 1261 { 1262 if ((have_full_symbols () || have_partial_symbols ()) 1263 && from_tty 1264 && (symfile_objfile 1265 ? !query (_("Discard symbol table from `%s'? "), 1266 symfile_objfile->name) 1267 : !query (_("Discard symbol table? ")))) 1268 error (_("Not confirmed.")); 1269 1270 /* solib descriptors may have handles to objfiles. Wipe them before their 1271 objfiles get stale by free_all_objfiles. */ 1272 no_shared_libraries (NULL, from_tty); 1273 1274 free_all_objfiles (); 1275 1276 gdb_assert (symfile_objfile == NULL); 1277 if (from_tty) 1278 printf_unfiltered (_("No symbol file now.\n")); 1279 } 1280 1281 static char * 1282 get_debug_link_info (struct objfile *objfile, unsigned long *crc32_out) 1283 { 1284 asection *sect; 1285 bfd_size_type debuglink_size; 1286 unsigned long crc32; 1287 char *contents; 1288 int crc_offset; 1289 1290 sect = bfd_get_section_by_name (objfile->obfd, ".gnu_debuglink"); 1291 1292 if (sect == NULL) 1293 return NULL; 1294 1295 debuglink_size = bfd_section_size (objfile->obfd, sect); 1296 1297 contents = xmalloc (debuglink_size); 1298 bfd_get_section_contents (objfile->obfd, sect, contents, 1299 (file_ptr)0, (bfd_size_type)debuglink_size); 1300 1301 /* Crc value is stored after the filename, aligned up to 4 bytes. */ 1302 crc_offset = strlen (contents) + 1; 1303 crc_offset = (crc_offset + 3) & ~3; 1304 1305 crc32 = bfd_get_32 (objfile->obfd, (bfd_byte *) (contents + crc_offset)); 1306 1307 *crc32_out = crc32; 1308 return contents; 1309 } 1310 1311 /* Return 32-bit CRC for ABFD. If successful store it to *FILE_CRC_RETURN and 1312 return 1. Otherwise print a warning and return 0. ABFD seek position is 1313 not preserved. */ 1314 1315 static int 1316 get_file_crc (bfd *abfd, unsigned long *file_crc_return) 1317 { 1318 unsigned long file_crc = 0; 1319 1320 if (bfd_seek (abfd, 0, SEEK_SET) != 0) 1321 { 1322 warning (_("Problem reading \"%s\" for CRC: %s"), 1323 bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ())); 1324 return 0; 1325 } 1326 1327 for (;;) 1328 { 1329 gdb_byte buffer[8 * 1024]; 1330 bfd_size_type count; 1331 1332 count = bfd_bread (buffer, sizeof (buffer), abfd); 1333 if (count == (bfd_size_type) -1) 1334 { 1335 warning (_("Problem reading \"%s\" for CRC: %s"), 1336 bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ())); 1337 return 0; 1338 } 1339 if (count == 0) 1340 break; 1341 file_crc = gnu_debuglink_crc32 (file_crc, buffer, count); 1342 } 1343 1344 *file_crc_return = file_crc; 1345 return 1; 1346 } 1347 1348 static int 1349 separate_debug_file_exists (const char *name, unsigned long crc, 1350 struct objfile *parent_objfile) 1351 { 1352 unsigned long file_crc; 1353 int file_crc_p; 1354 bfd *abfd; 1355 struct stat parent_stat, abfd_stat; 1356 int verified_as_different; 1357 1358 /* Find a separate debug info file as if symbols would be present in 1359 PARENT_OBJFILE itself this function would not be called. .gnu_debuglink 1360 section can contain just the basename of PARENT_OBJFILE without any 1361 ".debug" suffix as "/usr/lib/debug/path/to/file" is a separate tree where 1362 the separate debug infos with the same basename can exist. */ 1363 1364 if (filename_cmp (name, parent_objfile->name) == 0) 1365 return 0; 1366 1367 abfd = bfd_open_maybe_remote (name); 1368 1369 if (!abfd) 1370 return 0; 1371 1372 /* Verify symlinks were not the cause of filename_cmp name difference above. 1373 1374 Some operating systems, e.g. Windows, do not provide a meaningful 1375 st_ino; they always set it to zero. (Windows does provide a 1376 meaningful st_dev.) Do not indicate a duplicate library in that 1377 case. While there is no guarantee that a system that provides 1378 meaningful inode numbers will never set st_ino to zero, this is 1379 merely an optimization, so we do not need to worry about false 1380 negatives. */ 1381 1382 if (bfd_stat (abfd, &abfd_stat) == 0 1383 && abfd_stat.st_ino != 0 1384 && bfd_stat (parent_objfile->obfd, &parent_stat) == 0) 1385 { 1386 if (abfd_stat.st_dev == parent_stat.st_dev 1387 && abfd_stat.st_ino == parent_stat.st_ino) 1388 { 1389 bfd_close (abfd); 1390 return 0; 1391 } 1392 verified_as_different = 1; 1393 } 1394 else 1395 verified_as_different = 0; 1396 1397 file_crc_p = get_file_crc (abfd, &file_crc); 1398 1399 bfd_close (abfd); 1400 1401 if (!file_crc_p) 1402 return 0; 1403 1404 if (crc != file_crc) 1405 { 1406 /* If one (or both) the files are accessed for example the via "remote:" 1407 gdbserver way it does not support the bfd_stat operation. Verify 1408 whether those two files are not the same manually. */ 1409 1410 if (!verified_as_different && !parent_objfile->crc32_p) 1411 { 1412 parent_objfile->crc32_p = get_file_crc (parent_objfile->obfd, 1413 &parent_objfile->crc32); 1414 if (!parent_objfile->crc32_p) 1415 return 0; 1416 } 1417 1418 if (verified_as_different || parent_objfile->crc32 != file_crc) 1419 warning (_("the debug information found in \"%s\"" 1420 " does not match \"%s\" (CRC mismatch).\n"), 1421 name, parent_objfile->name); 1422 1423 return 0; 1424 } 1425 1426 return 1; 1427 } 1428 1429 char *debug_file_directory = NULL; 1430 static void 1431 show_debug_file_directory (struct ui_file *file, int from_tty, 1432 struct cmd_list_element *c, const char *value) 1433 { 1434 fprintf_filtered (file, 1435 _("The directory where separate debug " 1436 "symbols are searched for is \"%s\".\n"), 1437 value); 1438 } 1439 1440 #if ! defined (DEBUG_SUBDIRECTORY) 1441 #define DEBUG_SUBDIRECTORY ".debug" 1442 #endif 1443 1444 char * 1445 find_separate_debug_file_by_debuglink (struct objfile *objfile) 1446 { 1447 char *basename, *debugdir; 1448 char *dir = NULL; 1449 char *debugfile = NULL; 1450 char *canon_name = NULL; 1451 unsigned long crc32; 1452 int i; 1453 1454 basename = get_debug_link_info (objfile, &crc32); 1455 1456 if (basename == NULL) 1457 /* There's no separate debug info, hence there's no way we could 1458 load it => no warning. */ 1459 goto cleanup_return_debugfile; 1460 1461 dir = xstrdup (objfile->name); 1462 1463 /* Strip off the final filename part, leaving the directory name, 1464 followed by a slash. The directory can be relative or absolute. */ 1465 for (i = strlen(dir) - 1; i >= 0; i--) 1466 { 1467 if (IS_DIR_SEPARATOR (dir[i])) 1468 break; 1469 } 1470 /* If I is -1 then no directory is present there and DIR will be "". */ 1471 dir[i+1] = '\0'; 1472 1473 /* Set I to max (strlen (canon_name), strlen (dir)). */ 1474 canon_name = lrealpath (dir); 1475 i = strlen (dir); 1476 if (canon_name && strlen (canon_name) > i) 1477 i = strlen (canon_name); 1478 1479 debugfile = xmalloc (strlen (debug_file_directory) + 1 1480 + i 1481 + strlen (DEBUG_SUBDIRECTORY) 1482 + strlen ("/") 1483 + strlen (basename) 1484 + 1); 1485 1486 /* First try in the same directory as the original file. */ 1487 strcpy (debugfile, dir); 1488 strcat (debugfile, basename); 1489 1490 if (separate_debug_file_exists (debugfile, crc32, objfile)) 1491 goto cleanup_return_debugfile; 1492 1493 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */ 1494 strcpy (debugfile, dir); 1495 strcat (debugfile, DEBUG_SUBDIRECTORY); 1496 strcat (debugfile, "/"); 1497 strcat (debugfile, basename); 1498 1499 if (separate_debug_file_exists (debugfile, crc32, objfile)) 1500 goto cleanup_return_debugfile; 1501 1502 /* Then try in the global debugfile directories. 1503 1504 Keep backward compatibility so that DEBUG_FILE_DIRECTORY being "" will 1505 cause "/..." lookups. */ 1506 1507 debugdir = debug_file_directory; 1508 do 1509 { 1510 char *debugdir_end; 1511 1512 while (*debugdir == DIRNAME_SEPARATOR) 1513 debugdir++; 1514 1515 debugdir_end = strchr (debugdir, DIRNAME_SEPARATOR); 1516 if (debugdir_end == NULL) 1517 debugdir_end = &debugdir[strlen (debugdir)]; 1518 1519 memcpy (debugfile, debugdir, debugdir_end - debugdir); 1520 debugfile[debugdir_end - debugdir] = 0; 1521 strcat (debugfile, "/"); 1522 strcat (debugfile, dir); 1523 strcat (debugfile, basename); 1524 1525 if (separate_debug_file_exists (debugfile, crc32, objfile)) 1526 goto cleanup_return_debugfile; 1527 1528 /* If the file is in the sysroot, try using its base path in the 1529 global debugfile directory. */ 1530 if (canon_name 1531 && filename_ncmp (canon_name, gdb_sysroot, 1532 strlen (gdb_sysroot)) == 0 1533 && IS_DIR_SEPARATOR (canon_name[strlen (gdb_sysroot)])) 1534 { 1535 memcpy (debugfile, debugdir, debugdir_end - debugdir); 1536 debugfile[debugdir_end - debugdir] = 0; 1537 strcat (debugfile, canon_name + strlen (gdb_sysroot)); 1538 strcat (debugfile, "/"); 1539 strcat (debugfile, basename); 1540 1541 if (separate_debug_file_exists (debugfile, crc32, objfile)) 1542 goto cleanup_return_debugfile; 1543 } 1544 1545 debugdir = debugdir_end; 1546 } 1547 while (*debugdir != 0); 1548 1549 xfree (debugfile); 1550 debugfile = NULL; 1551 1552 cleanup_return_debugfile: 1553 xfree (canon_name); 1554 xfree (basename); 1555 xfree (dir); 1556 return debugfile; 1557 } 1558 1559 1560 /* This is the symbol-file command. Read the file, analyze its 1561 symbols, and add a struct symtab to a symtab list. The syntax of 1562 the command is rather bizarre: 1563 1564 1. The function buildargv implements various quoting conventions 1565 which are undocumented and have little or nothing in common with 1566 the way things are quoted (or not quoted) elsewhere in GDB. 1567 1568 2. Options are used, which are not generally used in GDB (perhaps 1569 "set mapped on", "set readnow on" would be better) 1570 1571 3. The order of options matters, which is contrary to GNU 1572 conventions (because it is confusing and inconvenient). */ 1573 1574 void 1575 symbol_file_command (char *args, int from_tty) 1576 { 1577 dont_repeat (); 1578 1579 if (args == NULL) 1580 { 1581 symbol_file_clear (from_tty); 1582 } 1583 else 1584 { 1585 char **argv = gdb_buildargv (args); 1586 int flags = OBJF_USERLOADED; 1587 struct cleanup *cleanups; 1588 char *name = NULL; 1589 1590 cleanups = make_cleanup_freeargv (argv); 1591 while (*argv != NULL) 1592 { 1593 if (strcmp (*argv, "-readnow") == 0) 1594 flags |= OBJF_READNOW; 1595 else if (**argv == '-') 1596 error (_("unknown option `%s'"), *argv); 1597 else 1598 { 1599 symbol_file_add_main_1 (*argv, from_tty, flags); 1600 name = *argv; 1601 } 1602 1603 argv++; 1604 } 1605 1606 if (name == NULL) 1607 error (_("no symbol file name was specified")); 1608 1609 do_cleanups (cleanups); 1610 } 1611 } 1612 1613 /* Set the initial language. 1614 1615 FIXME: A better solution would be to record the language in the 1616 psymtab when reading partial symbols, and then use it (if known) to 1617 set the language. This would be a win for formats that encode the 1618 language in an easily discoverable place, such as DWARF. For 1619 stabs, we can jump through hoops looking for specially named 1620 symbols or try to intuit the language from the specific type of 1621 stabs we find, but we can't do that until later when we read in 1622 full symbols. */ 1623 1624 void 1625 set_initial_language (void) 1626 { 1627 enum language lang = language_unknown; 1628 1629 if (language_of_main != language_unknown) 1630 lang = language_of_main; 1631 else 1632 { 1633 const char *filename; 1634 1635 filename = find_main_filename (); 1636 if (filename != NULL) 1637 lang = deduce_language_from_filename (filename); 1638 } 1639 1640 if (lang == language_unknown) 1641 { 1642 /* Make C the default language */ 1643 lang = language_c; 1644 } 1645 1646 set_language (lang); 1647 expected_language = current_language; /* Don't warn the user. */ 1648 } 1649 1650 /* If NAME is a remote name open the file using remote protocol, otherwise 1651 open it normally. */ 1652 1653 bfd * 1654 bfd_open_maybe_remote (const char *name) 1655 { 1656 if (remote_filename_p (name)) 1657 return remote_bfd_open (name, gnutarget); 1658 else 1659 return bfd_openr (name, gnutarget); 1660 } 1661 1662 1663 /* Open the file specified by NAME and hand it off to BFD for 1664 preliminary analysis. Return a newly initialized bfd *, which 1665 includes a newly malloc'd` copy of NAME (tilde-expanded and made 1666 absolute). In case of trouble, error() is called. */ 1667 1668 bfd * 1669 symfile_bfd_open (char *name) 1670 { 1671 bfd *sym_bfd; 1672 int desc; 1673 char *absolute_name; 1674 1675 if (remote_filename_p (name)) 1676 { 1677 name = xstrdup (name); 1678 sym_bfd = remote_bfd_open (name, gnutarget); 1679 if (!sym_bfd) 1680 { 1681 make_cleanup (xfree, name); 1682 error (_("`%s': can't open to read symbols: %s."), name, 1683 bfd_errmsg (bfd_get_error ())); 1684 } 1685 1686 if (!bfd_check_format (sym_bfd, bfd_object)) 1687 { 1688 bfd_close (sym_bfd); 1689 make_cleanup (xfree, name); 1690 error (_("`%s': can't read symbols: %s."), name, 1691 bfd_errmsg (bfd_get_error ())); 1692 } 1693 1694 return sym_bfd; 1695 } 1696 1697 name = tilde_expand (name); /* Returns 1st new malloc'd copy. */ 1698 1699 /* Look down path for it, allocate 2nd new malloc'd copy. */ 1700 desc = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST, name, 1701 O_RDONLY | O_BINARY, &absolute_name); 1702 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__) 1703 if (desc < 0) 1704 { 1705 char *exename = alloca (strlen (name) + 5); 1706 1707 strcat (strcpy (exename, name), ".exe"); 1708 desc = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST, exename, 1709 O_RDONLY | O_BINARY, &absolute_name); 1710 } 1711 #endif 1712 if (desc < 0) 1713 { 1714 make_cleanup (xfree, name); 1715 perror_with_name (name); 1716 } 1717 1718 /* Free 1st new malloc'd copy, but keep the 2nd malloc'd copy in 1719 bfd. It'll be freed in free_objfile(). */ 1720 xfree (name); 1721 name = absolute_name; 1722 1723 sym_bfd = bfd_fopen (name, gnutarget, FOPEN_RB, desc); 1724 if (!sym_bfd) 1725 { 1726 close (desc); 1727 make_cleanup (xfree, name); 1728 error (_("`%s': can't open to read symbols: %s."), name, 1729 bfd_errmsg (bfd_get_error ())); 1730 } 1731 bfd_set_cacheable (sym_bfd, 1); 1732 1733 if (!bfd_check_format (sym_bfd, bfd_object)) 1734 { 1735 /* FIXME: should be checking for errors from bfd_close (for one 1736 thing, on error it does not free all the storage associated 1737 with the bfd). */ 1738 bfd_close (sym_bfd); /* This also closes desc. */ 1739 make_cleanup (xfree, name); 1740 error (_("`%s': can't read symbols: %s."), name, 1741 bfd_errmsg (bfd_get_error ())); 1742 } 1743 1744 /* bfd_usrdata exists for applications and libbfd must not touch it. */ 1745 gdb_assert (bfd_usrdata (sym_bfd) == NULL); 1746 1747 return sym_bfd; 1748 } 1749 1750 /* Return the section index for SECTION_NAME on OBJFILE. Return -1 if 1751 the section was not found. */ 1752 1753 int 1754 get_section_index (struct objfile *objfile, char *section_name) 1755 { 1756 asection *sect = bfd_get_section_by_name (objfile->obfd, section_name); 1757 1758 if (sect) 1759 return sect->index; 1760 else 1761 return -1; 1762 } 1763 1764 /* Link SF into the global symtab_fns list. Called on startup by the 1765 _initialize routine in each object file format reader, to register 1766 information about each format the reader is prepared to handle. */ 1767 1768 void 1769 add_symtab_fns (const struct sym_fns *sf) 1770 { 1771 VEC_safe_push (sym_fns_ptr, symtab_fns, sf); 1772 } 1773 1774 /* Initialize OBJFILE to read symbols from its associated BFD. It 1775 either returns or calls error(). The result is an initialized 1776 struct sym_fns in the objfile structure, that contains cached 1777 information about the symbol file. */ 1778 1779 static const struct sym_fns * 1780 find_sym_fns (bfd *abfd) 1781 { 1782 const struct sym_fns *sf; 1783 enum bfd_flavour our_flavour = bfd_get_flavour (abfd); 1784 int i; 1785 1786 if (our_flavour == bfd_target_srec_flavour 1787 || our_flavour == bfd_target_ihex_flavour 1788 || our_flavour == bfd_target_tekhex_flavour) 1789 return NULL; /* No symbols. */ 1790 1791 for (i = 0; VEC_iterate (sym_fns_ptr, symtab_fns, i, sf); ++i) 1792 if (our_flavour == sf->sym_flavour) 1793 return sf; 1794 1795 error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."), 1796 bfd_get_target (abfd)); 1797 } 1798 1799 1800 /* This function runs the load command of our current target. */ 1801 1802 static void 1803 load_command (char *arg, int from_tty) 1804 { 1805 dont_repeat (); 1806 1807 /* The user might be reloading because the binary has changed. Take 1808 this opportunity to check. */ 1809 reopen_exec_file (); 1810 reread_symbols (); 1811 1812 if (arg == NULL) 1813 { 1814 char *parg; 1815 int count = 0; 1816 1817 parg = arg = get_exec_file (1); 1818 1819 /* Count how many \ " ' tab space there are in the name. */ 1820 while ((parg = strpbrk (parg, "\\\"'\t "))) 1821 { 1822 parg++; 1823 count++; 1824 } 1825 1826 if (count) 1827 { 1828 /* We need to quote this string so buildargv can pull it apart. */ 1829 char *temp = xmalloc (strlen (arg) + count + 1 ); 1830 char *ptemp = temp; 1831 char *prev; 1832 1833 make_cleanup (xfree, temp); 1834 1835 prev = parg = arg; 1836 while ((parg = strpbrk (parg, "\\\"'\t "))) 1837 { 1838 strncpy (ptemp, prev, parg - prev); 1839 ptemp += parg - prev; 1840 prev = parg++; 1841 *ptemp++ = '\\'; 1842 } 1843 strcpy (ptemp, prev); 1844 1845 arg = temp; 1846 } 1847 } 1848 1849 target_load (arg, from_tty); 1850 1851 /* After re-loading the executable, we don't really know which 1852 overlays are mapped any more. */ 1853 overlay_cache_invalid = 1; 1854 } 1855 1856 /* This version of "load" should be usable for any target. Currently 1857 it is just used for remote targets, not inftarg.c or core files, 1858 on the theory that only in that case is it useful. 1859 1860 Avoiding xmodem and the like seems like a win (a) because we don't have 1861 to worry about finding it, and (b) On VMS, fork() is very slow and so 1862 we don't want to run a subprocess. On the other hand, I'm not sure how 1863 performance compares. */ 1864 1865 static int validate_download = 0; 1866 1867 /* Callback service function for generic_load (bfd_map_over_sections). */ 1868 1869 static void 1870 add_section_size_callback (bfd *abfd, asection *asec, void *data) 1871 { 1872 bfd_size_type *sum = data; 1873 1874 *sum += bfd_get_section_size (asec); 1875 } 1876 1877 /* Opaque data for load_section_callback. */ 1878 struct load_section_data { 1879 unsigned long load_offset; 1880 struct load_progress_data *progress_data; 1881 VEC(memory_write_request_s) *requests; 1882 }; 1883 1884 /* Opaque data for load_progress. */ 1885 struct load_progress_data { 1886 /* Cumulative data. */ 1887 unsigned long write_count; 1888 unsigned long data_count; 1889 bfd_size_type total_size; 1890 }; 1891 1892 /* Opaque data for load_progress for a single section. */ 1893 struct load_progress_section_data { 1894 struct load_progress_data *cumulative; 1895 1896 /* Per-section data. */ 1897 const char *section_name; 1898 ULONGEST section_sent; 1899 ULONGEST section_size; 1900 CORE_ADDR lma; 1901 gdb_byte *buffer; 1902 }; 1903 1904 /* Target write callback routine for progress reporting. */ 1905 1906 static void 1907 load_progress (ULONGEST bytes, void *untyped_arg) 1908 { 1909 struct load_progress_section_data *args = untyped_arg; 1910 struct load_progress_data *totals; 1911 1912 if (args == NULL) 1913 /* Writing padding data. No easy way to get at the cumulative 1914 stats, so just ignore this. */ 1915 return; 1916 1917 totals = args->cumulative; 1918 1919 if (bytes == 0 && args->section_sent == 0) 1920 { 1921 /* The write is just starting. Let the user know we've started 1922 this section. */ 1923 ui_out_message (current_uiout, 0, "Loading section %s, size %s lma %s\n", 1924 args->section_name, hex_string (args->section_size), 1925 paddress (target_gdbarch, args->lma)); 1926 return; 1927 } 1928 1929 if (validate_download) 1930 { 1931 /* Broken memories and broken monitors manifest themselves here 1932 when bring new computers to life. This doubles already slow 1933 downloads. */ 1934 /* NOTE: cagney/1999-10-18: A more efficient implementation 1935 might add a verify_memory() method to the target vector and 1936 then use that. remote.c could implement that method using 1937 the ``qCRC'' packet. */ 1938 gdb_byte *check = xmalloc (bytes); 1939 struct cleanup *verify_cleanups = make_cleanup (xfree, check); 1940 1941 if (target_read_memory (args->lma, check, bytes) != 0) 1942 error (_("Download verify read failed at %s"), 1943 paddress (target_gdbarch, args->lma)); 1944 if (memcmp (args->buffer, check, bytes) != 0) 1945 error (_("Download verify compare failed at %s"), 1946 paddress (target_gdbarch, args->lma)); 1947 do_cleanups (verify_cleanups); 1948 } 1949 totals->data_count += bytes; 1950 args->lma += bytes; 1951 args->buffer += bytes; 1952 totals->write_count += 1; 1953 args->section_sent += bytes; 1954 if (quit_flag 1955 || (deprecated_ui_load_progress_hook != NULL 1956 && deprecated_ui_load_progress_hook (args->section_name, 1957 args->section_sent))) 1958 error (_("Canceled the download")); 1959 1960 if (deprecated_show_load_progress != NULL) 1961 deprecated_show_load_progress (args->section_name, 1962 args->section_sent, 1963 args->section_size, 1964 totals->data_count, 1965 totals->total_size); 1966 } 1967 1968 /* Callback service function for generic_load (bfd_map_over_sections). */ 1969 1970 static void 1971 load_section_callback (bfd *abfd, asection *asec, void *data) 1972 { 1973 struct memory_write_request *new_request; 1974 struct load_section_data *args = data; 1975 struct load_progress_section_data *section_data; 1976 bfd_size_type size = bfd_get_section_size (asec); 1977 gdb_byte *buffer; 1978 const char *sect_name = bfd_get_section_name (abfd, asec); 1979 1980 if ((bfd_get_section_flags (abfd, asec) & SEC_LOAD) == 0) 1981 return; 1982 1983 if (size == 0) 1984 return; 1985 1986 new_request = VEC_safe_push (memory_write_request_s, 1987 args->requests, NULL); 1988 memset (new_request, 0, sizeof (struct memory_write_request)); 1989 section_data = xcalloc (1, sizeof (struct load_progress_section_data)); 1990 new_request->begin = bfd_section_lma (abfd, asec) + args->load_offset; 1991 new_request->end = new_request->begin + size; /* FIXME Should size 1992 be in instead? */ 1993 new_request->data = xmalloc (size); 1994 new_request->baton = section_data; 1995 1996 buffer = new_request->data; 1997 1998 section_data->cumulative = args->progress_data; 1999 section_data->section_name = sect_name; 2000 section_data->section_size = size; 2001 section_data->lma = new_request->begin; 2002 section_data->buffer = buffer; 2003 2004 bfd_get_section_contents (abfd, asec, buffer, 0, size); 2005 } 2006 2007 /* Clean up an entire memory request vector, including load 2008 data and progress records. */ 2009 2010 static void 2011 clear_memory_write_data (void *arg) 2012 { 2013 VEC(memory_write_request_s) **vec_p = arg; 2014 VEC(memory_write_request_s) *vec = *vec_p; 2015 int i; 2016 struct memory_write_request *mr; 2017 2018 for (i = 0; VEC_iterate (memory_write_request_s, vec, i, mr); ++i) 2019 { 2020 xfree (mr->data); 2021 xfree (mr->baton); 2022 } 2023 VEC_free (memory_write_request_s, vec); 2024 } 2025 2026 void 2027 generic_load (char *args, int from_tty) 2028 { 2029 bfd *loadfile_bfd; 2030 struct timeval start_time, end_time; 2031 char *filename; 2032 struct cleanup *old_cleanups = make_cleanup (null_cleanup, 0); 2033 struct load_section_data cbdata; 2034 struct load_progress_data total_progress; 2035 struct ui_out *uiout = current_uiout; 2036 2037 CORE_ADDR entry; 2038 char **argv; 2039 2040 memset (&cbdata, 0, sizeof (cbdata)); 2041 memset (&total_progress, 0, sizeof (total_progress)); 2042 cbdata.progress_data = &total_progress; 2043 2044 make_cleanup (clear_memory_write_data, &cbdata.requests); 2045 2046 if (args == NULL) 2047 error_no_arg (_("file to load")); 2048 2049 argv = gdb_buildargv (args); 2050 make_cleanup_freeargv (argv); 2051 2052 filename = tilde_expand (argv[0]); 2053 make_cleanup (xfree, filename); 2054 2055 if (argv[1] != NULL) 2056 { 2057 char *endptr; 2058 2059 cbdata.load_offset = strtoul (argv[1], &endptr, 0); 2060 2061 /* If the last word was not a valid number then 2062 treat it as a file name with spaces in. */ 2063 if (argv[1] == endptr) 2064 error (_("Invalid download offset:%s."), argv[1]); 2065 2066 if (argv[2] != NULL) 2067 error (_("Too many parameters.")); 2068 } 2069 2070 /* Open the file for loading. */ 2071 loadfile_bfd = bfd_openr (filename, gnutarget); 2072 if (loadfile_bfd == NULL) 2073 { 2074 perror_with_name (filename); 2075 return; 2076 } 2077 2078 /* FIXME: should be checking for errors from bfd_close (for one thing, 2079 on error it does not free all the storage associated with the 2080 bfd). */ 2081 make_cleanup_bfd_close (loadfile_bfd); 2082 2083 if (!bfd_check_format (loadfile_bfd, bfd_object)) 2084 { 2085 error (_("\"%s\" is not an object file: %s"), filename, 2086 bfd_errmsg (bfd_get_error ())); 2087 } 2088 2089 bfd_map_over_sections (loadfile_bfd, add_section_size_callback, 2090 (void *) &total_progress.total_size); 2091 2092 bfd_map_over_sections (loadfile_bfd, load_section_callback, &cbdata); 2093 2094 gettimeofday (&start_time, NULL); 2095 2096 if (target_write_memory_blocks (cbdata.requests, flash_discard, 2097 load_progress) != 0) 2098 error (_("Load failed")); 2099 2100 gettimeofday (&end_time, NULL); 2101 2102 entry = bfd_get_start_address (loadfile_bfd); 2103 ui_out_text (uiout, "Start address "); 2104 ui_out_field_fmt (uiout, "address", "%s", paddress (target_gdbarch, entry)); 2105 ui_out_text (uiout, ", load size "); 2106 ui_out_field_fmt (uiout, "load-size", "%lu", total_progress.data_count); 2107 ui_out_text (uiout, "\n"); 2108 /* We were doing this in remote-mips.c, I suspect it is right 2109 for other targets too. */ 2110 regcache_write_pc (get_current_regcache (), entry); 2111 2112 /* Reset breakpoints, now that we have changed the load image. For 2113 instance, breakpoints may have been set (or reset, by 2114 post_create_inferior) while connected to the target but before we 2115 loaded the program. In that case, the prologue analyzer could 2116 have read instructions from the target to find the right 2117 breakpoint locations. Loading has changed the contents of that 2118 memory. */ 2119 2120 breakpoint_re_set (); 2121 2122 /* FIXME: are we supposed to call symbol_file_add or not? According 2123 to a comment from remote-mips.c (where a call to symbol_file_add 2124 was commented out), making the call confuses GDB if more than one 2125 file is loaded in. Some targets do (e.g., remote-vx.c) but 2126 others don't (or didn't - perhaps they have all been deleted). */ 2127 2128 print_transfer_performance (gdb_stdout, total_progress.data_count, 2129 total_progress.write_count, 2130 &start_time, &end_time); 2131 2132 do_cleanups (old_cleanups); 2133 } 2134 2135 /* Report how fast the transfer went. */ 2136 2137 /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being 2138 replaced by print_transfer_performance (with a very different 2139 function signature). */ 2140 2141 void 2142 report_transfer_performance (unsigned long data_count, time_t start_time, 2143 time_t end_time) 2144 { 2145 struct timeval start, end; 2146 2147 start.tv_sec = start_time; 2148 start.tv_usec = 0; 2149 end.tv_sec = end_time; 2150 end.tv_usec = 0; 2151 2152 print_transfer_performance (gdb_stdout, data_count, 0, &start, &end); 2153 } 2154 2155 void 2156 print_transfer_performance (struct ui_file *stream, 2157 unsigned long data_count, 2158 unsigned long write_count, 2159 const struct timeval *start_time, 2160 const struct timeval *end_time) 2161 { 2162 ULONGEST time_count; 2163 struct ui_out *uiout = current_uiout; 2164 2165 /* Compute the elapsed time in milliseconds, as a tradeoff between 2166 accuracy and overflow. */ 2167 time_count = (end_time->tv_sec - start_time->tv_sec) * 1000; 2168 time_count += (end_time->tv_usec - start_time->tv_usec) / 1000; 2169 2170 ui_out_text (uiout, "Transfer rate: "); 2171 if (time_count > 0) 2172 { 2173 unsigned long rate = ((ULONGEST) data_count * 1000) / time_count; 2174 2175 if (ui_out_is_mi_like_p (uiout)) 2176 { 2177 ui_out_field_fmt (uiout, "transfer-rate", "%lu", rate * 8); 2178 ui_out_text (uiout, " bits/sec"); 2179 } 2180 else if (rate < 1024) 2181 { 2182 ui_out_field_fmt (uiout, "transfer-rate", "%lu", rate); 2183 ui_out_text (uiout, " bytes/sec"); 2184 } 2185 else 2186 { 2187 ui_out_field_fmt (uiout, "transfer-rate", "%lu", rate / 1024); 2188 ui_out_text (uiout, " KB/sec"); 2189 } 2190 } 2191 else 2192 { 2193 ui_out_field_fmt (uiout, "transferred-bits", "%lu", (data_count * 8)); 2194 ui_out_text (uiout, " bits in <1 sec"); 2195 } 2196 if (write_count > 0) 2197 { 2198 ui_out_text (uiout, ", "); 2199 ui_out_field_fmt (uiout, "write-rate", "%lu", data_count / write_count); 2200 ui_out_text (uiout, " bytes/write"); 2201 } 2202 ui_out_text (uiout, ".\n"); 2203 } 2204 2205 /* This function allows the addition of incrementally linked object files. 2206 It does not modify any state in the target, only in the debugger. */ 2207 /* Note: ezannoni 2000-04-13 This function/command used to have a 2208 special case syntax for the rombug target (Rombug is the boot 2209 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the 2210 rombug case, the user doesn't need to supply a text address, 2211 instead a call to target_link() (in target.c) would supply the 2212 value to use. We are now discontinuing this type of ad hoc syntax. */ 2213 2214 static void 2215 add_symbol_file_command (char *args, int from_tty) 2216 { 2217 struct gdbarch *gdbarch = get_current_arch (); 2218 char *filename = NULL; 2219 int flags = OBJF_USERLOADED; 2220 char *arg; 2221 int section_index = 0; 2222 int argcnt = 0; 2223 int sec_num = 0; 2224 int i; 2225 int expecting_sec_name = 0; 2226 int expecting_sec_addr = 0; 2227 char **argv; 2228 2229 struct sect_opt 2230 { 2231 char *name; 2232 char *value; 2233 }; 2234 2235 struct section_addr_info *section_addrs; 2236 struct sect_opt *sect_opts = NULL; 2237 size_t num_sect_opts = 0; 2238 struct cleanup *my_cleanups = make_cleanup (null_cleanup, NULL); 2239 2240 num_sect_opts = 16; 2241 sect_opts = (struct sect_opt *) xmalloc (num_sect_opts 2242 * sizeof (struct sect_opt)); 2243 2244 dont_repeat (); 2245 2246 if (args == NULL) 2247 error (_("add-symbol-file takes a file name and an address")); 2248 2249 argv = gdb_buildargv (args); 2250 make_cleanup_freeargv (argv); 2251 2252 for (arg = argv[0], argcnt = 0; arg != NULL; arg = argv[++argcnt]) 2253 { 2254 /* Process the argument. */ 2255 if (argcnt == 0) 2256 { 2257 /* The first argument is the file name. */ 2258 filename = tilde_expand (arg); 2259 make_cleanup (xfree, filename); 2260 } 2261 else 2262 if (argcnt == 1) 2263 { 2264 /* The second argument is always the text address at which 2265 to load the program. */ 2266 sect_opts[section_index].name = ".text"; 2267 sect_opts[section_index].value = arg; 2268 if (++section_index >= num_sect_opts) 2269 { 2270 num_sect_opts *= 2; 2271 sect_opts = ((struct sect_opt *) 2272 xrealloc (sect_opts, 2273 num_sect_opts 2274 * sizeof (struct sect_opt))); 2275 } 2276 } 2277 else 2278 { 2279 /* It's an option (starting with '-') or it's an argument 2280 to an option. */ 2281 2282 if (*arg == '-') 2283 { 2284 if (strcmp (arg, "-readnow") == 0) 2285 flags |= OBJF_READNOW; 2286 else if (strcmp (arg, "-s") == 0) 2287 { 2288 expecting_sec_name = 1; 2289 expecting_sec_addr = 1; 2290 } 2291 } 2292 else 2293 { 2294 if (expecting_sec_name) 2295 { 2296 sect_opts[section_index].name = arg; 2297 expecting_sec_name = 0; 2298 } 2299 else 2300 if (expecting_sec_addr) 2301 { 2302 sect_opts[section_index].value = arg; 2303 expecting_sec_addr = 0; 2304 if (++section_index >= num_sect_opts) 2305 { 2306 num_sect_opts *= 2; 2307 sect_opts = ((struct sect_opt *) 2308 xrealloc (sect_opts, 2309 num_sect_opts 2310 * sizeof (struct sect_opt))); 2311 } 2312 } 2313 else 2314 error (_("USAGE: add-symbol-file <filename> <textaddress>" 2315 " [-readnow] [-s <secname> <addr>]*")); 2316 } 2317 } 2318 } 2319 2320 /* This command takes at least two arguments. The first one is a 2321 filename, and the second is the address where this file has been 2322 loaded. Abort now if this address hasn't been provided by the 2323 user. */ 2324 if (section_index < 1) 2325 error (_("The address where %s has been loaded is missing"), filename); 2326 2327 /* Print the prompt for the query below. And save the arguments into 2328 a sect_addr_info structure to be passed around to other 2329 functions. We have to split this up into separate print 2330 statements because hex_string returns a local static 2331 string. */ 2332 2333 printf_unfiltered (_("add symbol table from file \"%s\" at\n"), filename); 2334 section_addrs = alloc_section_addr_info (section_index); 2335 make_cleanup (xfree, section_addrs); 2336 for (i = 0; i < section_index; i++) 2337 { 2338 CORE_ADDR addr; 2339 char *val = sect_opts[i].value; 2340 char *sec = sect_opts[i].name; 2341 2342 addr = parse_and_eval_address (val); 2343 2344 /* Here we store the section offsets in the order they were 2345 entered on the command line. */ 2346 section_addrs->other[sec_num].name = sec; 2347 section_addrs->other[sec_num].addr = addr; 2348 printf_unfiltered ("\t%s_addr = %s\n", sec, 2349 paddress (gdbarch, addr)); 2350 sec_num++; 2351 2352 /* The object's sections are initialized when a 2353 call is made to build_objfile_section_table (objfile). 2354 This happens in reread_symbols. 2355 At this point, we don't know what file type this is, 2356 so we can't determine what section names are valid. */ 2357 } 2358 2359 if (from_tty && (!query ("%s", ""))) 2360 error (_("Not confirmed.")); 2361 2362 symbol_file_add (filename, from_tty ? SYMFILE_VERBOSE : 0, 2363 section_addrs, flags); 2364 2365 /* Getting new symbols may change our opinion about what is 2366 frameless. */ 2367 reinit_frame_cache (); 2368 do_cleanups (my_cleanups); 2369 } 2370 2371 2372 /* Re-read symbols if a symbol-file has changed. */ 2373 void 2374 reread_symbols (void) 2375 { 2376 struct objfile *objfile; 2377 long new_modtime; 2378 int reread_one = 0; 2379 struct stat new_statbuf; 2380 int res; 2381 2382 /* With the addition of shared libraries, this should be modified, 2383 the load time should be saved in the partial symbol tables, since 2384 different tables may come from different source files. FIXME. 2385 This routine should then walk down each partial symbol table 2386 and see if the symbol table that it originates from has been changed. */ 2387 2388 for (objfile = object_files; objfile; objfile = objfile->next) 2389 { 2390 /* solib-sunos.c creates one objfile with obfd. */ 2391 if (objfile->obfd == NULL) 2392 continue; 2393 2394 /* Separate debug objfiles are handled in the main objfile. */ 2395 if (objfile->separate_debug_objfile_backlink) 2396 continue; 2397 2398 /* If this object is from an archive (what you usually create with 2399 `ar', often called a `static library' on most systems, though 2400 a `shared library' on AIX is also an archive), then you should 2401 stat on the archive name, not member name. */ 2402 if (objfile->obfd->my_archive) 2403 res = stat (objfile->obfd->my_archive->filename, &new_statbuf); 2404 else 2405 res = stat (objfile->name, &new_statbuf); 2406 if (res != 0) 2407 { 2408 /* FIXME, should use print_sys_errmsg but it's not filtered. */ 2409 printf_unfiltered (_("`%s' has disappeared; keeping its symbols.\n"), 2410 objfile->name); 2411 continue; 2412 } 2413 new_modtime = new_statbuf.st_mtime; 2414 if (new_modtime != objfile->mtime) 2415 { 2416 struct cleanup *old_cleanups; 2417 struct section_offsets *offsets; 2418 int num_offsets; 2419 char *obfd_filename; 2420 2421 printf_unfiltered (_("`%s' has changed; re-reading symbols.\n"), 2422 objfile->name); 2423 2424 /* There are various functions like symbol_file_add, 2425 symfile_bfd_open, syms_from_objfile, etc., which might 2426 appear to do what we want. But they have various other 2427 effects which we *don't* want. So we just do stuff 2428 ourselves. We don't worry about mapped files (for one thing, 2429 any mapped file will be out of date). */ 2430 2431 /* If we get an error, blow away this objfile (not sure if 2432 that is the correct response for things like shared 2433 libraries). */ 2434 old_cleanups = make_cleanup_free_objfile (objfile); 2435 /* We need to do this whenever any symbols go away. */ 2436 make_cleanup (clear_symtab_users_cleanup, 0 /*ignore*/); 2437 2438 if (exec_bfd != NULL 2439 && filename_cmp (bfd_get_filename (objfile->obfd), 2440 bfd_get_filename (exec_bfd)) == 0) 2441 { 2442 /* Reload EXEC_BFD without asking anything. */ 2443 2444 exec_file_attach (bfd_get_filename (objfile->obfd), 0); 2445 } 2446 2447 /* Keep the calls order approx. the same as in free_objfile. */ 2448 2449 /* Free the separate debug objfiles. It will be 2450 automatically recreated by sym_read. */ 2451 free_objfile_separate_debug (objfile); 2452 2453 /* Remove any references to this objfile in the global 2454 value lists. */ 2455 preserve_values (objfile); 2456 2457 /* Nuke all the state that we will re-read. Much of the following 2458 code which sets things to NULL really is necessary to tell 2459 other parts of GDB that there is nothing currently there. 2460 2461 Try to keep the freeing order compatible with free_objfile. */ 2462 2463 if (objfile->sf != NULL) 2464 { 2465 (*objfile->sf->sym_finish) (objfile); 2466 } 2467 2468 clear_objfile_data (objfile); 2469 2470 /* Clean up any state BFD has sitting around. We don't need 2471 to close the descriptor but BFD lacks a way of closing the 2472 BFD without closing the descriptor. */ 2473 obfd_filename = bfd_get_filename (objfile->obfd); 2474 if (!bfd_close (objfile->obfd)) 2475 error (_("Can't close BFD for %s: %s"), objfile->name, 2476 bfd_errmsg (bfd_get_error ())); 2477 objfile->obfd = bfd_open_maybe_remote (obfd_filename); 2478 if (objfile->obfd == NULL) 2479 error (_("Can't open %s to read symbols."), objfile->name); 2480 else 2481 objfile->obfd = gdb_bfd_ref (objfile->obfd); 2482 /* bfd_openr sets cacheable to true, which is what we want. */ 2483 if (!bfd_check_format (objfile->obfd, bfd_object)) 2484 error (_("Can't read symbols from %s: %s."), objfile->name, 2485 bfd_errmsg (bfd_get_error ())); 2486 2487 /* Save the offsets, we will nuke them with the rest of the 2488 objfile_obstack. */ 2489 num_offsets = objfile->num_sections; 2490 offsets = ((struct section_offsets *) 2491 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets))); 2492 memcpy (offsets, objfile->section_offsets, 2493 SIZEOF_N_SECTION_OFFSETS (num_offsets)); 2494 2495 /* FIXME: Do we have to free a whole linked list, or is this 2496 enough? */ 2497 if (objfile->global_psymbols.list) 2498 xfree (objfile->global_psymbols.list); 2499 memset (&objfile->global_psymbols, 0, 2500 sizeof (objfile->global_psymbols)); 2501 if (objfile->static_psymbols.list) 2502 xfree (objfile->static_psymbols.list); 2503 memset (&objfile->static_psymbols, 0, 2504 sizeof (objfile->static_psymbols)); 2505 2506 /* Free the obstacks for non-reusable objfiles. */ 2507 psymbol_bcache_free (objfile->psymbol_cache); 2508 objfile->psymbol_cache = psymbol_bcache_init (); 2509 bcache_xfree (objfile->macro_cache); 2510 objfile->macro_cache = bcache_xmalloc (NULL, NULL); 2511 bcache_xfree (objfile->filename_cache); 2512 objfile->filename_cache = bcache_xmalloc (NULL,NULL); 2513 if (objfile->demangled_names_hash != NULL) 2514 { 2515 htab_delete (objfile->demangled_names_hash); 2516 objfile->demangled_names_hash = NULL; 2517 } 2518 obstack_free (&objfile->objfile_obstack, 0); 2519 objfile->sections = NULL; 2520 objfile->symtabs = NULL; 2521 objfile->psymtabs = NULL; 2522 objfile->psymtabs_addrmap = NULL; 2523 objfile->free_psymtabs = NULL; 2524 objfile->template_symbols = NULL; 2525 objfile->msymbols = NULL; 2526 objfile->deprecated_sym_private = NULL; 2527 objfile->minimal_symbol_count = 0; 2528 memset (&objfile->msymbol_hash, 0, 2529 sizeof (objfile->msymbol_hash)); 2530 memset (&objfile->msymbol_demangled_hash, 0, 2531 sizeof (objfile->msymbol_demangled_hash)); 2532 2533 /* obstack_init also initializes the obstack so it is 2534 empty. We could use obstack_specify_allocation but 2535 gdb_obstack.h specifies the alloc/dealloc 2536 functions. */ 2537 obstack_init (&objfile->objfile_obstack); 2538 if (build_objfile_section_table (objfile)) 2539 { 2540 error (_("Can't find the file sections in `%s': %s"), 2541 objfile->name, bfd_errmsg (bfd_get_error ())); 2542 } 2543 terminate_minimal_symbol_table (objfile); 2544 2545 /* We use the same section offsets as from last time. I'm not 2546 sure whether that is always correct for shared libraries. */ 2547 objfile->section_offsets = (struct section_offsets *) 2548 obstack_alloc (&objfile->objfile_obstack, 2549 SIZEOF_N_SECTION_OFFSETS (num_offsets)); 2550 memcpy (objfile->section_offsets, offsets, 2551 SIZEOF_N_SECTION_OFFSETS (num_offsets)); 2552 objfile->num_sections = num_offsets; 2553 2554 /* What the hell is sym_new_init for, anyway? The concept of 2555 distinguishing between the main file and additional files 2556 in this way seems rather dubious. */ 2557 if (objfile == symfile_objfile) 2558 { 2559 (*objfile->sf->sym_new_init) (objfile); 2560 } 2561 2562 (*objfile->sf->sym_init) (objfile); 2563 clear_complaints (&symfile_complaints, 1, 1); 2564 /* Do not set flags as this is safe and we don't want to be 2565 verbose. */ 2566 (*objfile->sf->sym_read) (objfile, 0); 2567 if ((objfile->flags & OBJF_PSYMTABS_READ) != 0) 2568 { 2569 objfile->flags &= ~OBJF_PSYMTABS_READ; 2570 require_partial_symbols (objfile, 0); 2571 } 2572 2573 if (!objfile_has_symbols (objfile)) 2574 { 2575 wrap_here (""); 2576 printf_unfiltered (_("(no debugging symbols found)\n")); 2577 wrap_here (""); 2578 } 2579 2580 /* We're done reading the symbol file; finish off complaints. */ 2581 clear_complaints (&symfile_complaints, 0, 1); 2582 2583 /* Getting new symbols may change our opinion about what is 2584 frameless. */ 2585 2586 reinit_frame_cache (); 2587 2588 /* Discard cleanups as symbol reading was successful. */ 2589 discard_cleanups (old_cleanups); 2590 2591 /* If the mtime has changed between the time we set new_modtime 2592 and now, we *want* this to be out of date, so don't call stat 2593 again now. */ 2594 objfile->mtime = new_modtime; 2595 reread_one = 1; 2596 init_entry_point_info (objfile); 2597 } 2598 } 2599 2600 if (reread_one) 2601 { 2602 /* Notify objfiles that we've modified objfile sections. */ 2603 objfiles_changed (); 2604 2605 clear_symtab_users (0); 2606 /* At least one objfile has changed, so we can consider that 2607 the executable we're debugging has changed too. */ 2608 observer_notify_executable_changed (); 2609 } 2610 } 2611 2612 2613 2614 typedef struct 2615 { 2616 char *ext; 2617 enum language lang; 2618 } 2619 filename_language; 2620 2621 static filename_language *filename_language_table; 2622 static int fl_table_size, fl_table_next; 2623 2624 static void 2625 add_filename_language (char *ext, enum language lang) 2626 { 2627 if (fl_table_next >= fl_table_size) 2628 { 2629 fl_table_size += 10; 2630 filename_language_table = 2631 xrealloc (filename_language_table, 2632 fl_table_size * sizeof (*filename_language_table)); 2633 } 2634 2635 filename_language_table[fl_table_next].ext = xstrdup (ext); 2636 filename_language_table[fl_table_next].lang = lang; 2637 fl_table_next++; 2638 } 2639 2640 static char *ext_args; 2641 static void 2642 show_ext_args (struct ui_file *file, int from_tty, 2643 struct cmd_list_element *c, const char *value) 2644 { 2645 fprintf_filtered (file, 2646 _("Mapping between filename extension " 2647 "and source language is \"%s\".\n"), 2648 value); 2649 } 2650 2651 static void 2652 set_ext_lang_command (char *args, int from_tty, struct cmd_list_element *e) 2653 { 2654 int i; 2655 char *cp = ext_args; 2656 enum language lang; 2657 2658 /* First arg is filename extension, starting with '.' */ 2659 if (*cp != '.') 2660 error (_("'%s': Filename extension must begin with '.'"), ext_args); 2661 2662 /* Find end of first arg. */ 2663 while (*cp && !isspace (*cp)) 2664 cp++; 2665 2666 if (*cp == '\0') 2667 error (_("'%s': two arguments required -- " 2668 "filename extension and language"), 2669 ext_args); 2670 2671 /* Null-terminate first arg. */ 2672 *cp++ = '\0'; 2673 2674 /* Find beginning of second arg, which should be a source language. */ 2675 while (*cp && isspace (*cp)) 2676 cp++; 2677 2678 if (*cp == '\0') 2679 error (_("'%s': two arguments required -- " 2680 "filename extension and language"), 2681 ext_args); 2682 2683 /* Lookup the language from among those we know. */ 2684 lang = language_enum (cp); 2685 2686 /* Now lookup the filename extension: do we already know it? */ 2687 for (i = 0; i < fl_table_next; i++) 2688 if (0 == strcmp (ext_args, filename_language_table[i].ext)) 2689 break; 2690 2691 if (i >= fl_table_next) 2692 { 2693 /* New file extension. */ 2694 add_filename_language (ext_args, lang); 2695 } 2696 else 2697 { 2698 /* Redefining a previously known filename extension. */ 2699 2700 /* if (from_tty) */ 2701 /* query ("Really make files of type %s '%s'?", */ 2702 /* ext_args, language_str (lang)); */ 2703 2704 xfree (filename_language_table[i].ext); 2705 filename_language_table[i].ext = xstrdup (ext_args); 2706 filename_language_table[i].lang = lang; 2707 } 2708 } 2709 2710 static void 2711 info_ext_lang_command (char *args, int from_tty) 2712 { 2713 int i; 2714 2715 printf_filtered (_("Filename extensions and the languages they represent:")); 2716 printf_filtered ("\n\n"); 2717 for (i = 0; i < fl_table_next; i++) 2718 printf_filtered ("\t%s\t- %s\n", 2719 filename_language_table[i].ext, 2720 language_str (filename_language_table[i].lang)); 2721 } 2722 2723 static void 2724 init_filename_language_table (void) 2725 { 2726 if (fl_table_size == 0) /* Protect against repetition. */ 2727 { 2728 fl_table_size = 20; 2729 fl_table_next = 0; 2730 filename_language_table = 2731 xmalloc (fl_table_size * sizeof (*filename_language_table)); 2732 add_filename_language (".c", language_c); 2733 add_filename_language (".d", language_d); 2734 add_filename_language (".C", language_cplus); 2735 add_filename_language (".cc", language_cplus); 2736 add_filename_language (".cp", language_cplus); 2737 add_filename_language (".cpp", language_cplus); 2738 add_filename_language (".cxx", language_cplus); 2739 add_filename_language (".c++", language_cplus); 2740 add_filename_language (".java", language_java); 2741 add_filename_language (".class", language_java); 2742 add_filename_language (".m", language_objc); 2743 add_filename_language (".f", language_fortran); 2744 add_filename_language (".F", language_fortran); 2745 add_filename_language (".for", language_fortran); 2746 add_filename_language (".FOR", language_fortran); 2747 add_filename_language (".ftn", language_fortran); 2748 add_filename_language (".FTN", language_fortran); 2749 add_filename_language (".fpp", language_fortran); 2750 add_filename_language (".FPP", language_fortran); 2751 add_filename_language (".f90", language_fortran); 2752 add_filename_language (".F90", language_fortran); 2753 add_filename_language (".f95", language_fortran); 2754 add_filename_language (".F95", language_fortran); 2755 add_filename_language (".f03", language_fortran); 2756 add_filename_language (".F03", language_fortran); 2757 add_filename_language (".f08", language_fortran); 2758 add_filename_language (".F08", language_fortran); 2759 add_filename_language (".s", language_asm); 2760 add_filename_language (".sx", language_asm); 2761 add_filename_language (".S", language_asm); 2762 add_filename_language (".pas", language_pascal); 2763 add_filename_language (".p", language_pascal); 2764 add_filename_language (".pp", language_pascal); 2765 add_filename_language (".adb", language_ada); 2766 add_filename_language (".ads", language_ada); 2767 add_filename_language (".a", language_ada); 2768 add_filename_language (".ada", language_ada); 2769 add_filename_language (".dg", language_ada); 2770 } 2771 } 2772 2773 enum language 2774 deduce_language_from_filename (const char *filename) 2775 { 2776 int i; 2777 char *cp; 2778 2779 if (filename != NULL) 2780 if ((cp = strrchr (filename, '.')) != NULL) 2781 for (i = 0; i < fl_table_next; i++) 2782 if (strcmp (cp, filename_language_table[i].ext) == 0) 2783 return filename_language_table[i].lang; 2784 2785 return language_unknown; 2786 } 2787 2788 /* allocate_symtab: 2789 2790 Allocate and partly initialize a new symbol table. Return a pointer 2791 to it. error() if no space. 2792 2793 Caller must set these fields: 2794 LINETABLE(symtab) 2795 symtab->blockvector 2796 symtab->dirname 2797 symtab->free_code 2798 symtab->free_ptr 2799 */ 2800 2801 struct symtab * 2802 allocate_symtab (const char *filename, struct objfile *objfile) 2803 { 2804 struct symtab *symtab; 2805 2806 symtab = (struct symtab *) 2807 obstack_alloc (&objfile->objfile_obstack, sizeof (struct symtab)); 2808 memset (symtab, 0, sizeof (*symtab)); 2809 symtab->filename = (char *) bcache (filename, strlen (filename) + 1, 2810 objfile->filename_cache); 2811 symtab->fullname = NULL; 2812 symtab->language = deduce_language_from_filename (filename); 2813 symtab->debugformat = "unknown"; 2814 2815 /* Hook it to the objfile it comes from. */ 2816 2817 symtab->objfile = objfile; 2818 symtab->next = objfile->symtabs; 2819 objfile->symtabs = symtab; 2820 2821 return (symtab); 2822 } 2823 2824 2825 /* Reset all data structures in gdb which may contain references to symbol 2826 table data. ADD_FLAGS is a bitmask of enum symfile_add_flags. */ 2827 2828 void 2829 clear_symtab_users (int add_flags) 2830 { 2831 /* Someday, we should do better than this, by only blowing away 2832 the things that really need to be blown. */ 2833 2834 /* Clear the "current" symtab first, because it is no longer valid. 2835 breakpoint_re_set may try to access the current symtab. */ 2836 clear_current_source_symtab_and_line (); 2837 2838 clear_displays (); 2839 if ((add_flags & SYMFILE_DEFER_BP_RESET) == 0) 2840 breakpoint_re_set (); 2841 clear_last_displayed_sal (); 2842 clear_pc_function_cache (); 2843 observer_notify_new_objfile (NULL); 2844 2845 /* Clear globals which might have pointed into a removed objfile. 2846 FIXME: It's not clear which of these are supposed to persist 2847 between expressions and which ought to be reset each time. */ 2848 expression_context_block = NULL; 2849 innermost_block = NULL; 2850 2851 /* Varobj may refer to old symbols, perform a cleanup. */ 2852 varobj_invalidate (); 2853 2854 } 2855 2856 static void 2857 clear_symtab_users_cleanup (void *ignore) 2858 { 2859 clear_symtab_users (0); 2860 } 2861 2862 /* OVERLAYS: 2863 The following code implements an abstraction for debugging overlay sections. 2864 2865 The target model is as follows: 2866 1) The gnu linker will permit multiple sections to be mapped into the 2867 same VMA, each with its own unique LMA (or load address). 2868 2) It is assumed that some runtime mechanism exists for mapping the 2869 sections, one by one, from the load address into the VMA address. 2870 3) This code provides a mechanism for gdb to keep track of which 2871 sections should be considered to be mapped from the VMA to the LMA. 2872 This information is used for symbol lookup, and memory read/write. 2873 For instance, if a section has been mapped then its contents 2874 should be read from the VMA, otherwise from the LMA. 2875 2876 Two levels of debugger support for overlays are available. One is 2877 "manual", in which the debugger relies on the user to tell it which 2878 overlays are currently mapped. This level of support is 2879 implemented entirely in the core debugger, and the information about 2880 whether a section is mapped is kept in the objfile->obj_section table. 2881 2882 The second level of support is "automatic", and is only available if 2883 the target-specific code provides functionality to read the target's 2884 overlay mapping table, and translate its contents for the debugger 2885 (by updating the mapped state information in the obj_section tables). 2886 2887 The interface is as follows: 2888 User commands: 2889 overlay map <name> -- tell gdb to consider this section mapped 2890 overlay unmap <name> -- tell gdb to consider this section unmapped 2891 overlay list -- list the sections that GDB thinks are mapped 2892 overlay read-target -- get the target's state of what's mapped 2893 overlay off/manual/auto -- set overlay debugging state 2894 Functional interface: 2895 find_pc_mapped_section(pc): if the pc is in the range of a mapped 2896 section, return that section. 2897 find_pc_overlay(pc): find any overlay section that contains 2898 the pc, either in its VMA or its LMA 2899 section_is_mapped(sect): true if overlay is marked as mapped 2900 section_is_overlay(sect): true if section's VMA != LMA 2901 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA 2902 pc_in_unmapped_range(...): true if pc belongs to section's LMA 2903 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap 2904 overlay_mapped_address(...): map an address from section's LMA to VMA 2905 overlay_unmapped_address(...): map an address from section's VMA to LMA 2906 symbol_overlayed_address(...): Return a "current" address for symbol: 2907 either in VMA or LMA depending on whether 2908 the symbol's section is currently mapped. */ 2909 2910 /* Overlay debugging state: */ 2911 2912 enum overlay_debugging_state overlay_debugging = ovly_off; 2913 int overlay_cache_invalid = 0; /* True if need to refresh mapped state. */ 2914 2915 /* Function: section_is_overlay (SECTION) 2916 Returns true if SECTION has VMA not equal to LMA, ie. 2917 SECTION is loaded at an address different from where it will "run". */ 2918 2919 int 2920 section_is_overlay (struct obj_section *section) 2921 { 2922 if (overlay_debugging && section) 2923 { 2924 bfd *abfd = section->objfile->obfd; 2925 asection *bfd_section = section->the_bfd_section; 2926 2927 if (bfd_section_lma (abfd, bfd_section) != 0 2928 && bfd_section_lma (abfd, bfd_section) 2929 != bfd_section_vma (abfd, bfd_section)) 2930 return 1; 2931 } 2932 2933 return 0; 2934 } 2935 2936 /* Function: overlay_invalidate_all (void) 2937 Invalidate the mapped state of all overlay sections (mark it as stale). */ 2938 2939 static void 2940 overlay_invalidate_all (void) 2941 { 2942 struct objfile *objfile; 2943 struct obj_section *sect; 2944 2945 ALL_OBJSECTIONS (objfile, sect) 2946 if (section_is_overlay (sect)) 2947 sect->ovly_mapped = -1; 2948 } 2949 2950 /* Function: section_is_mapped (SECTION) 2951 Returns true if section is an overlay, and is currently mapped. 2952 2953 Access to the ovly_mapped flag is restricted to this function, so 2954 that we can do automatic update. If the global flag 2955 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call 2956 overlay_invalidate_all. If the mapped state of the particular 2957 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */ 2958 2959 int 2960 section_is_mapped (struct obj_section *osect) 2961 { 2962 struct gdbarch *gdbarch; 2963 2964 if (osect == 0 || !section_is_overlay (osect)) 2965 return 0; 2966 2967 switch (overlay_debugging) 2968 { 2969 default: 2970 case ovly_off: 2971 return 0; /* overlay debugging off */ 2972 case ovly_auto: /* overlay debugging automatic */ 2973 /* Unles there is a gdbarch_overlay_update function, 2974 there's really nothing useful to do here (can't really go auto). */ 2975 gdbarch = get_objfile_arch (osect->objfile); 2976 if (gdbarch_overlay_update_p (gdbarch)) 2977 { 2978 if (overlay_cache_invalid) 2979 { 2980 overlay_invalidate_all (); 2981 overlay_cache_invalid = 0; 2982 } 2983 if (osect->ovly_mapped == -1) 2984 gdbarch_overlay_update (gdbarch, osect); 2985 } 2986 /* fall thru to manual case */ 2987 case ovly_on: /* overlay debugging manual */ 2988 return osect->ovly_mapped == 1; 2989 } 2990 } 2991 2992 /* Function: pc_in_unmapped_range 2993 If PC falls into the lma range of SECTION, return true, else false. */ 2994 2995 CORE_ADDR 2996 pc_in_unmapped_range (CORE_ADDR pc, struct obj_section *section) 2997 { 2998 if (section_is_overlay (section)) 2999 { 3000 bfd *abfd = section->objfile->obfd; 3001 asection *bfd_section = section->the_bfd_section; 3002 3003 /* We assume the LMA is relocated by the same offset as the VMA. */ 3004 bfd_vma size = bfd_get_section_size (bfd_section); 3005 CORE_ADDR offset = obj_section_offset (section); 3006 3007 if (bfd_get_section_lma (abfd, bfd_section) + offset <= pc 3008 && pc < bfd_get_section_lma (abfd, bfd_section) + offset + size) 3009 return 1; 3010 } 3011 3012 return 0; 3013 } 3014 3015 /* Function: pc_in_mapped_range 3016 If PC falls into the vma range of SECTION, return true, else false. */ 3017 3018 CORE_ADDR 3019 pc_in_mapped_range (CORE_ADDR pc, struct obj_section *section) 3020 { 3021 if (section_is_overlay (section)) 3022 { 3023 if (obj_section_addr (section) <= pc 3024 && pc < obj_section_endaddr (section)) 3025 return 1; 3026 } 3027 3028 return 0; 3029 } 3030 3031 3032 /* Return true if the mapped ranges of sections A and B overlap, false 3033 otherwise. */ 3034 static int 3035 sections_overlap (struct obj_section *a, struct obj_section *b) 3036 { 3037 CORE_ADDR a_start = obj_section_addr (a); 3038 CORE_ADDR a_end = obj_section_endaddr (a); 3039 CORE_ADDR b_start = obj_section_addr (b); 3040 CORE_ADDR b_end = obj_section_endaddr (b); 3041 3042 return (a_start < b_end && b_start < a_end); 3043 } 3044 3045 /* Function: overlay_unmapped_address (PC, SECTION) 3046 Returns the address corresponding to PC in the unmapped (load) range. 3047 May be the same as PC. */ 3048 3049 CORE_ADDR 3050 overlay_unmapped_address (CORE_ADDR pc, struct obj_section *section) 3051 { 3052 if (section_is_overlay (section) && pc_in_mapped_range (pc, section)) 3053 { 3054 bfd *abfd = section->objfile->obfd; 3055 asection *bfd_section = section->the_bfd_section; 3056 3057 return pc + bfd_section_lma (abfd, bfd_section) 3058 - bfd_section_vma (abfd, bfd_section); 3059 } 3060 3061 return pc; 3062 } 3063 3064 /* Function: overlay_mapped_address (PC, SECTION) 3065 Returns the address corresponding to PC in the mapped (runtime) range. 3066 May be the same as PC. */ 3067 3068 CORE_ADDR 3069 overlay_mapped_address (CORE_ADDR pc, struct obj_section *section) 3070 { 3071 if (section_is_overlay (section) && pc_in_unmapped_range (pc, section)) 3072 { 3073 bfd *abfd = section->objfile->obfd; 3074 asection *bfd_section = section->the_bfd_section; 3075 3076 return pc + bfd_section_vma (abfd, bfd_section) 3077 - bfd_section_lma (abfd, bfd_section); 3078 } 3079 3080 return pc; 3081 } 3082 3083 3084 /* Function: symbol_overlayed_address 3085 Return one of two addresses (relative to the VMA or to the LMA), 3086 depending on whether the section is mapped or not. */ 3087 3088 CORE_ADDR 3089 symbol_overlayed_address (CORE_ADDR address, struct obj_section *section) 3090 { 3091 if (overlay_debugging) 3092 { 3093 /* If the symbol has no section, just return its regular address. */ 3094 if (section == 0) 3095 return address; 3096 /* If the symbol's section is not an overlay, just return its 3097 address. */ 3098 if (!section_is_overlay (section)) 3099 return address; 3100 /* If the symbol's section is mapped, just return its address. */ 3101 if (section_is_mapped (section)) 3102 return address; 3103 /* 3104 * HOWEVER: if the symbol is in an overlay section which is NOT mapped, 3105 * then return its LOADED address rather than its vma address!! 3106 */ 3107 return overlay_unmapped_address (address, section); 3108 } 3109 return address; 3110 } 3111 3112 /* Function: find_pc_overlay (PC) 3113 Return the best-match overlay section for PC: 3114 If PC matches a mapped overlay section's VMA, return that section. 3115 Else if PC matches an unmapped section's VMA, return that section. 3116 Else if PC matches an unmapped section's LMA, return that section. */ 3117 3118 struct obj_section * 3119 find_pc_overlay (CORE_ADDR pc) 3120 { 3121 struct objfile *objfile; 3122 struct obj_section *osect, *best_match = NULL; 3123 3124 if (overlay_debugging) 3125 ALL_OBJSECTIONS (objfile, osect) 3126 if (section_is_overlay (osect)) 3127 { 3128 if (pc_in_mapped_range (pc, osect)) 3129 { 3130 if (section_is_mapped (osect)) 3131 return osect; 3132 else 3133 best_match = osect; 3134 } 3135 else if (pc_in_unmapped_range (pc, osect)) 3136 best_match = osect; 3137 } 3138 return best_match; 3139 } 3140 3141 /* Function: find_pc_mapped_section (PC) 3142 If PC falls into the VMA address range of an overlay section that is 3143 currently marked as MAPPED, return that section. Else return NULL. */ 3144 3145 struct obj_section * 3146 find_pc_mapped_section (CORE_ADDR pc) 3147 { 3148 struct objfile *objfile; 3149 struct obj_section *osect; 3150 3151 if (overlay_debugging) 3152 ALL_OBJSECTIONS (objfile, osect) 3153 if (pc_in_mapped_range (pc, osect) && section_is_mapped (osect)) 3154 return osect; 3155 3156 return NULL; 3157 } 3158 3159 /* Function: list_overlays_command 3160 Print a list of mapped sections and their PC ranges. */ 3161 3162 void 3163 list_overlays_command (char *args, int from_tty) 3164 { 3165 int nmapped = 0; 3166 struct objfile *objfile; 3167 struct obj_section *osect; 3168 3169 if (overlay_debugging) 3170 ALL_OBJSECTIONS (objfile, osect) 3171 if (section_is_mapped (osect)) 3172 { 3173 struct gdbarch *gdbarch = get_objfile_arch (objfile); 3174 const char *name; 3175 bfd_vma lma, vma; 3176 int size; 3177 3178 vma = bfd_section_vma (objfile->obfd, osect->the_bfd_section); 3179 lma = bfd_section_lma (objfile->obfd, osect->the_bfd_section); 3180 size = bfd_get_section_size (osect->the_bfd_section); 3181 name = bfd_section_name (objfile->obfd, osect->the_bfd_section); 3182 3183 printf_filtered ("Section %s, loaded at ", name); 3184 fputs_filtered (paddress (gdbarch, lma), gdb_stdout); 3185 puts_filtered (" - "); 3186 fputs_filtered (paddress (gdbarch, lma + size), gdb_stdout); 3187 printf_filtered (", mapped at "); 3188 fputs_filtered (paddress (gdbarch, vma), gdb_stdout); 3189 puts_filtered (" - "); 3190 fputs_filtered (paddress (gdbarch, vma + size), gdb_stdout); 3191 puts_filtered ("\n"); 3192 3193 nmapped++; 3194 } 3195 if (nmapped == 0) 3196 printf_filtered (_("No sections are mapped.\n")); 3197 } 3198 3199 /* Function: map_overlay_command 3200 Mark the named section as mapped (ie. residing at its VMA address). */ 3201 3202 void 3203 map_overlay_command (char *args, int from_tty) 3204 { 3205 struct objfile *objfile, *objfile2; 3206 struct obj_section *sec, *sec2; 3207 3208 if (!overlay_debugging) 3209 error (_("Overlay debugging not enabled. Use " 3210 "either the 'overlay auto' or\n" 3211 "the 'overlay manual' command.")); 3212 3213 if (args == 0 || *args == 0) 3214 error (_("Argument required: name of an overlay section")); 3215 3216 /* First, find a section matching the user supplied argument. */ 3217 ALL_OBJSECTIONS (objfile, sec) 3218 if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args)) 3219 { 3220 /* Now, check to see if the section is an overlay. */ 3221 if (!section_is_overlay (sec)) 3222 continue; /* not an overlay section */ 3223 3224 /* Mark the overlay as "mapped". */ 3225 sec->ovly_mapped = 1; 3226 3227 /* Next, make a pass and unmap any sections that are 3228 overlapped by this new section: */ 3229 ALL_OBJSECTIONS (objfile2, sec2) 3230 if (sec2->ovly_mapped && sec != sec2 && sections_overlap (sec, sec2)) 3231 { 3232 if (info_verbose) 3233 printf_unfiltered (_("Note: section %s unmapped by overlap\n"), 3234 bfd_section_name (objfile->obfd, 3235 sec2->the_bfd_section)); 3236 sec2->ovly_mapped = 0; /* sec2 overlaps sec: unmap sec2. */ 3237 } 3238 return; 3239 } 3240 error (_("No overlay section called %s"), args); 3241 } 3242 3243 /* Function: unmap_overlay_command 3244 Mark the overlay section as unmapped 3245 (ie. resident in its LMA address range, rather than the VMA range). */ 3246 3247 void 3248 unmap_overlay_command (char *args, int from_tty) 3249 { 3250 struct objfile *objfile; 3251 struct obj_section *sec; 3252 3253 if (!overlay_debugging) 3254 error (_("Overlay debugging not enabled. " 3255 "Use either the 'overlay auto' or\n" 3256 "the 'overlay manual' command.")); 3257 3258 if (args == 0 || *args == 0) 3259 error (_("Argument required: name of an overlay section")); 3260 3261 /* First, find a section matching the user supplied argument. */ 3262 ALL_OBJSECTIONS (objfile, sec) 3263 if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args)) 3264 { 3265 if (!sec->ovly_mapped) 3266 error (_("Section %s is not mapped"), args); 3267 sec->ovly_mapped = 0; 3268 return; 3269 } 3270 error (_("No overlay section called %s"), args); 3271 } 3272 3273 /* Function: overlay_auto_command 3274 A utility command to turn on overlay debugging. 3275 Possibly this should be done via a set/show command. */ 3276 3277 static void 3278 overlay_auto_command (char *args, int from_tty) 3279 { 3280 overlay_debugging = ovly_auto; 3281 enable_overlay_breakpoints (); 3282 if (info_verbose) 3283 printf_unfiltered (_("Automatic overlay debugging enabled.")); 3284 } 3285 3286 /* Function: overlay_manual_command 3287 A utility command to turn on overlay debugging. 3288 Possibly this should be done via a set/show command. */ 3289 3290 static void 3291 overlay_manual_command (char *args, int from_tty) 3292 { 3293 overlay_debugging = ovly_on; 3294 disable_overlay_breakpoints (); 3295 if (info_verbose) 3296 printf_unfiltered (_("Overlay debugging enabled.")); 3297 } 3298 3299 /* Function: overlay_off_command 3300 A utility command to turn on overlay debugging. 3301 Possibly this should be done via a set/show command. */ 3302 3303 static void 3304 overlay_off_command (char *args, int from_tty) 3305 { 3306 overlay_debugging = ovly_off; 3307 disable_overlay_breakpoints (); 3308 if (info_verbose) 3309 printf_unfiltered (_("Overlay debugging disabled.")); 3310 } 3311 3312 static void 3313 overlay_load_command (char *args, int from_tty) 3314 { 3315 struct gdbarch *gdbarch = get_current_arch (); 3316 3317 if (gdbarch_overlay_update_p (gdbarch)) 3318 gdbarch_overlay_update (gdbarch, NULL); 3319 else 3320 error (_("This target does not know how to read its overlay state.")); 3321 } 3322 3323 /* Function: overlay_command 3324 A place-holder for a mis-typed command. */ 3325 3326 /* Command list chain containing all defined "overlay" subcommands. */ 3327 struct cmd_list_element *overlaylist; 3328 3329 static void 3330 overlay_command (char *args, int from_tty) 3331 { 3332 printf_unfiltered 3333 ("\"overlay\" must be followed by the name of an overlay command.\n"); 3334 help_list (overlaylist, "overlay ", -1, gdb_stdout); 3335 } 3336 3337 3338 /* Target Overlays for the "Simplest" overlay manager: 3339 3340 This is GDB's default target overlay layer. It works with the 3341 minimal overlay manager supplied as an example by Cygnus. The 3342 entry point is via a function pointer "gdbarch_overlay_update", 3343 so targets that use a different runtime overlay manager can 3344 substitute their own overlay_update function and take over the 3345 function pointer. 3346 3347 The overlay_update function pokes around in the target's data structures 3348 to see what overlays are mapped, and updates GDB's overlay mapping with 3349 this information. 3350 3351 In this simple implementation, the target data structures are as follows: 3352 unsigned _novlys; /# number of overlay sections #/ 3353 unsigned _ovly_table[_novlys][4] = { 3354 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/ 3355 {..., ..., ..., ...}, 3356 } 3357 unsigned _novly_regions; /# number of overlay regions #/ 3358 unsigned _ovly_region_table[_novly_regions][3] = { 3359 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/ 3360 {..., ..., ...}, 3361 } 3362 These functions will attempt to update GDB's mappedness state in the 3363 symbol section table, based on the target's mappedness state. 3364 3365 To do this, we keep a cached copy of the target's _ovly_table, and 3366 attempt to detect when the cached copy is invalidated. The main 3367 entry point is "simple_overlay_update(SECT), which looks up SECT in 3368 the cached table and re-reads only the entry for that section from 3369 the target (whenever possible). */ 3370 3371 /* Cached, dynamically allocated copies of the target data structures: */ 3372 static unsigned (*cache_ovly_table)[4] = 0; 3373 static unsigned cache_novlys = 0; 3374 static CORE_ADDR cache_ovly_table_base = 0; 3375 enum ovly_index 3376 { 3377 VMA, SIZE, LMA, MAPPED 3378 }; 3379 3380 /* Throw away the cached copy of _ovly_table. */ 3381 static void 3382 simple_free_overlay_table (void) 3383 { 3384 if (cache_ovly_table) 3385 xfree (cache_ovly_table); 3386 cache_novlys = 0; 3387 cache_ovly_table = NULL; 3388 cache_ovly_table_base = 0; 3389 } 3390 3391 /* Read an array of ints of size SIZE from the target into a local buffer. 3392 Convert to host order. int LEN is number of ints. */ 3393 static void 3394 read_target_long_array (CORE_ADDR memaddr, unsigned int *myaddr, 3395 int len, int size, enum bfd_endian byte_order) 3396 { 3397 /* FIXME (alloca): Not safe if array is very large. */ 3398 gdb_byte *buf = alloca (len * size); 3399 int i; 3400 3401 read_memory (memaddr, buf, len * size); 3402 for (i = 0; i < len; i++) 3403 myaddr[i] = extract_unsigned_integer (size * i + buf, size, byte_order); 3404 } 3405 3406 /* Find and grab a copy of the target _ovly_table 3407 (and _novlys, which is needed for the table's size). */ 3408 static int 3409 simple_read_overlay_table (void) 3410 { 3411 struct minimal_symbol *novlys_msym, *ovly_table_msym; 3412 struct gdbarch *gdbarch; 3413 int word_size; 3414 enum bfd_endian byte_order; 3415 3416 simple_free_overlay_table (); 3417 novlys_msym = lookup_minimal_symbol ("_novlys", NULL, NULL); 3418 if (! novlys_msym) 3419 { 3420 error (_("Error reading inferior's overlay table: " 3421 "couldn't find `_novlys' variable\n" 3422 "in inferior. Use `overlay manual' mode.")); 3423 return 0; 3424 } 3425 3426 ovly_table_msym = lookup_minimal_symbol ("_ovly_table", NULL, NULL); 3427 if (! ovly_table_msym) 3428 { 3429 error (_("Error reading inferior's overlay table: couldn't find " 3430 "`_ovly_table' array\n" 3431 "in inferior. Use `overlay manual' mode.")); 3432 return 0; 3433 } 3434 3435 gdbarch = get_objfile_arch (msymbol_objfile (ovly_table_msym)); 3436 word_size = gdbarch_long_bit (gdbarch) / TARGET_CHAR_BIT; 3437 byte_order = gdbarch_byte_order (gdbarch); 3438 3439 cache_novlys = read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym), 3440 4, byte_order); 3441 cache_ovly_table 3442 = (void *) xmalloc (cache_novlys * sizeof (*cache_ovly_table)); 3443 cache_ovly_table_base = SYMBOL_VALUE_ADDRESS (ovly_table_msym); 3444 read_target_long_array (cache_ovly_table_base, 3445 (unsigned int *) cache_ovly_table, 3446 cache_novlys * 4, word_size, byte_order); 3447 3448 return 1; /* SUCCESS */ 3449 } 3450 3451 /* Function: simple_overlay_update_1 3452 A helper function for simple_overlay_update. Assuming a cached copy 3453 of _ovly_table exists, look through it to find an entry whose vma, 3454 lma and size match those of OSECT. Re-read the entry and make sure 3455 it still matches OSECT (else the table may no longer be valid). 3456 Set OSECT's mapped state to match the entry. Return: 1 for 3457 success, 0 for failure. */ 3458 3459 static int 3460 simple_overlay_update_1 (struct obj_section *osect) 3461 { 3462 int i, size; 3463 bfd *obfd = osect->objfile->obfd; 3464 asection *bsect = osect->the_bfd_section; 3465 struct gdbarch *gdbarch = get_objfile_arch (osect->objfile); 3466 int word_size = gdbarch_long_bit (gdbarch) / TARGET_CHAR_BIT; 3467 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); 3468 3469 size = bfd_get_section_size (osect->the_bfd_section); 3470 for (i = 0; i < cache_novlys; i++) 3471 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect) 3472 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect) 3473 /* && cache_ovly_table[i][SIZE] == size */ ) 3474 { 3475 read_target_long_array (cache_ovly_table_base + i * word_size, 3476 (unsigned int *) cache_ovly_table[i], 3477 4, word_size, byte_order); 3478 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect) 3479 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect) 3480 /* && cache_ovly_table[i][SIZE] == size */ ) 3481 { 3482 osect->ovly_mapped = cache_ovly_table[i][MAPPED]; 3483 return 1; 3484 } 3485 else /* Warning! Warning! Target's ovly table has changed! */ 3486 return 0; 3487 } 3488 return 0; 3489 } 3490 3491 /* Function: simple_overlay_update 3492 If OSECT is NULL, then update all sections' mapped state 3493 (after re-reading the entire target _ovly_table). 3494 If OSECT is non-NULL, then try to find a matching entry in the 3495 cached ovly_table and update only OSECT's mapped state. 3496 If a cached entry can't be found or the cache isn't valid, then 3497 re-read the entire cache, and go ahead and update all sections. */ 3498 3499 void 3500 simple_overlay_update (struct obj_section *osect) 3501 { 3502 struct objfile *objfile; 3503 3504 /* Were we given an osect to look up? NULL means do all of them. */ 3505 if (osect) 3506 /* Have we got a cached copy of the target's overlay table? */ 3507 if (cache_ovly_table != NULL) 3508 { 3509 /* Does its cached location match what's currently in the 3510 symtab? */ 3511 struct minimal_symbol *minsym 3512 = lookup_minimal_symbol ("_ovly_table", NULL, NULL); 3513 3514 if (minsym == NULL) 3515 error (_("Error reading inferior's overlay table: couldn't " 3516 "find `_ovly_table' array\n" 3517 "in inferior. Use `overlay manual' mode.")); 3518 3519 if (cache_ovly_table_base == SYMBOL_VALUE_ADDRESS (minsym)) 3520 /* Then go ahead and try to look up this single section in 3521 the cache. */ 3522 if (simple_overlay_update_1 (osect)) 3523 /* Found it! We're done. */ 3524 return; 3525 } 3526 3527 /* Cached table no good: need to read the entire table anew. 3528 Or else we want all the sections, in which case it's actually 3529 more efficient to read the whole table in one block anyway. */ 3530 3531 if (! simple_read_overlay_table ()) 3532 return; 3533 3534 /* Now may as well update all sections, even if only one was requested. */ 3535 ALL_OBJSECTIONS (objfile, osect) 3536 if (section_is_overlay (osect)) 3537 { 3538 int i, size; 3539 bfd *obfd = osect->objfile->obfd; 3540 asection *bsect = osect->the_bfd_section; 3541 3542 size = bfd_get_section_size (bsect); 3543 for (i = 0; i < cache_novlys; i++) 3544 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect) 3545 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect) 3546 /* && cache_ovly_table[i][SIZE] == size */ ) 3547 { /* obj_section matches i'th entry in ovly_table. */ 3548 osect->ovly_mapped = cache_ovly_table[i][MAPPED]; 3549 break; /* finished with inner for loop: break out. */ 3550 } 3551 } 3552 } 3553 3554 /* Set the output sections and output offsets for section SECTP in 3555 ABFD. The relocation code in BFD will read these offsets, so we 3556 need to be sure they're initialized. We map each section to itself, 3557 with no offset; this means that SECTP->vma will be honored. */ 3558 3559 static void 3560 symfile_dummy_outputs (bfd *abfd, asection *sectp, void *dummy) 3561 { 3562 sectp->output_section = sectp; 3563 sectp->output_offset = 0; 3564 } 3565 3566 /* Default implementation for sym_relocate. */ 3567 3568 3569 bfd_byte * 3570 default_symfile_relocate (struct objfile *objfile, asection *sectp, 3571 bfd_byte *buf) 3572 { 3573 bfd *abfd = objfile->obfd; 3574 3575 /* We're only interested in sections with relocation 3576 information. */ 3577 if ((sectp->flags & SEC_RELOC) == 0) 3578 return NULL; 3579 3580 /* We will handle section offsets properly elsewhere, so relocate as if 3581 all sections begin at 0. */ 3582 bfd_map_over_sections (abfd, symfile_dummy_outputs, NULL); 3583 3584 return bfd_simple_get_relocated_section_contents (abfd, sectp, buf, NULL); 3585 } 3586 3587 /* Relocate the contents of a debug section SECTP in ABFD. The 3588 contents are stored in BUF if it is non-NULL, or returned in a 3589 malloc'd buffer otherwise. 3590 3591 For some platforms and debug info formats, shared libraries contain 3592 relocations against the debug sections (particularly for DWARF-2; 3593 one affected platform is PowerPC GNU/Linux, although it depends on 3594 the version of the linker in use). Also, ELF object files naturally 3595 have unresolved relocations for their debug sections. We need to apply 3596 the relocations in order to get the locations of symbols correct. 3597 Another example that may require relocation processing, is the 3598 DWARF-2 .eh_frame section in .o files, although it isn't strictly a 3599 debug section. */ 3600 3601 bfd_byte * 3602 symfile_relocate_debug_section (struct objfile *objfile, 3603 asection *sectp, bfd_byte *buf) 3604 { 3605 gdb_assert (objfile->sf->sym_relocate); 3606 3607 return (*objfile->sf->sym_relocate) (objfile, sectp, buf); 3608 } 3609 3610 struct symfile_segment_data * 3611 get_symfile_segment_data (bfd *abfd) 3612 { 3613 const struct sym_fns *sf = find_sym_fns (abfd); 3614 3615 if (sf == NULL) 3616 return NULL; 3617 3618 return sf->sym_segments (abfd); 3619 } 3620 3621 void 3622 free_symfile_segment_data (struct symfile_segment_data *data) 3623 { 3624 xfree (data->segment_bases); 3625 xfree (data->segment_sizes); 3626 xfree (data->segment_info); 3627 xfree (data); 3628 } 3629 3630 3631 /* Given: 3632 - DATA, containing segment addresses from the object file ABFD, and 3633 the mapping from ABFD's sections onto the segments that own them, 3634 and 3635 - SEGMENT_BASES[0 .. NUM_SEGMENT_BASES - 1], holding the actual 3636 segment addresses reported by the target, 3637 store the appropriate offsets for each section in OFFSETS. 3638 3639 If there are fewer entries in SEGMENT_BASES than there are segments 3640 in DATA, then apply SEGMENT_BASES' last entry to all the segments. 3641 3642 If there are more entries, then ignore the extra. The target may 3643 not be able to distinguish between an empty data segment and a 3644 missing data segment; a missing text segment is less plausible. */ 3645 int 3646 symfile_map_offsets_to_segments (bfd *abfd, struct symfile_segment_data *data, 3647 struct section_offsets *offsets, 3648 int num_segment_bases, 3649 const CORE_ADDR *segment_bases) 3650 { 3651 int i; 3652 asection *sect; 3653 3654 /* It doesn't make sense to call this function unless you have some 3655 segment base addresses. */ 3656 gdb_assert (num_segment_bases > 0); 3657 3658 /* If we do not have segment mappings for the object file, we 3659 can not relocate it by segments. */ 3660 gdb_assert (data != NULL); 3661 gdb_assert (data->num_segments > 0); 3662 3663 for (i = 0, sect = abfd->sections; sect != NULL; i++, sect = sect->next) 3664 { 3665 int which = data->segment_info[i]; 3666 3667 gdb_assert (0 <= which && which <= data->num_segments); 3668 3669 /* Don't bother computing offsets for sections that aren't 3670 loaded as part of any segment. */ 3671 if (! which) 3672 continue; 3673 3674 /* Use the last SEGMENT_BASES entry as the address of any extra 3675 segments mentioned in DATA->segment_info. */ 3676 if (which > num_segment_bases) 3677 which = num_segment_bases; 3678 3679 offsets->offsets[i] = (segment_bases[which - 1] 3680 - data->segment_bases[which - 1]); 3681 } 3682 3683 return 1; 3684 } 3685 3686 static void 3687 symfile_find_segment_sections (struct objfile *objfile) 3688 { 3689 bfd *abfd = objfile->obfd; 3690 int i; 3691 asection *sect; 3692 struct symfile_segment_data *data; 3693 3694 data = get_symfile_segment_data (objfile->obfd); 3695 if (data == NULL) 3696 return; 3697 3698 if (data->num_segments != 1 && data->num_segments != 2) 3699 { 3700 free_symfile_segment_data (data); 3701 return; 3702 } 3703 3704 for (i = 0, sect = abfd->sections; sect != NULL; i++, sect = sect->next) 3705 { 3706 int which = data->segment_info[i]; 3707 3708 if (which == 1) 3709 { 3710 if (objfile->sect_index_text == -1) 3711 objfile->sect_index_text = sect->index; 3712 3713 if (objfile->sect_index_rodata == -1) 3714 objfile->sect_index_rodata = sect->index; 3715 } 3716 else if (which == 2) 3717 { 3718 if (objfile->sect_index_data == -1) 3719 objfile->sect_index_data = sect->index; 3720 3721 if (objfile->sect_index_bss == -1) 3722 objfile->sect_index_bss = sect->index; 3723 } 3724 } 3725 3726 free_symfile_segment_data (data); 3727 } 3728 3729 void 3730 _initialize_symfile (void) 3731 { 3732 struct cmd_list_element *c; 3733 3734 c = add_cmd ("symbol-file", class_files, symbol_file_command, _("\ 3735 Load symbol table from executable file FILE.\n\ 3736 The `file' command can also load symbol tables, as well as setting the file\n\ 3737 to execute."), &cmdlist); 3738 set_cmd_completer (c, filename_completer); 3739 3740 c = add_cmd ("add-symbol-file", class_files, add_symbol_file_command, _("\ 3741 Load symbols from FILE, assuming FILE has been dynamically loaded.\n\ 3742 Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR>\ 3743 ...]\nADDR is the starting address of the file's text.\n\ 3744 The optional arguments are section-name section-address pairs and\n\ 3745 should be specified if the data and bss segments are not contiguous\n\ 3746 with the text. SECT is a section name to be loaded at SECT_ADDR."), 3747 &cmdlist); 3748 set_cmd_completer (c, filename_completer); 3749 3750 c = add_cmd ("load", class_files, load_command, _("\ 3751 Dynamically load FILE into the running program, and record its symbols\n\ 3752 for access from GDB.\n\ 3753 A load OFFSET may also be given."), &cmdlist); 3754 set_cmd_completer (c, filename_completer); 3755 3756 add_setshow_boolean_cmd ("symbol-reloading", class_support, 3757 &symbol_reloading, _("\ 3758 Set dynamic symbol table reloading multiple times in one run."), _("\ 3759 Show dynamic symbol table reloading multiple times in one run."), NULL, 3760 NULL, 3761 show_symbol_reloading, 3762 &setlist, &showlist); 3763 3764 add_prefix_cmd ("overlay", class_support, overlay_command, 3765 _("Commands for debugging overlays."), &overlaylist, 3766 "overlay ", 0, &cmdlist); 3767 3768 add_com_alias ("ovly", "overlay", class_alias, 1); 3769 add_com_alias ("ov", "overlay", class_alias, 1); 3770 3771 add_cmd ("map-overlay", class_support, map_overlay_command, 3772 _("Assert that an overlay section is mapped."), &overlaylist); 3773 3774 add_cmd ("unmap-overlay", class_support, unmap_overlay_command, 3775 _("Assert that an overlay section is unmapped."), &overlaylist); 3776 3777 add_cmd ("list-overlays", class_support, list_overlays_command, 3778 _("List mappings of overlay sections."), &overlaylist); 3779 3780 add_cmd ("manual", class_support, overlay_manual_command, 3781 _("Enable overlay debugging."), &overlaylist); 3782 add_cmd ("off", class_support, overlay_off_command, 3783 _("Disable overlay debugging."), &overlaylist); 3784 add_cmd ("auto", class_support, overlay_auto_command, 3785 _("Enable automatic overlay debugging."), &overlaylist); 3786 add_cmd ("load-target", class_support, overlay_load_command, 3787 _("Read the overlay mapping state from the target."), &overlaylist); 3788 3789 /* Filename extension to source language lookup table: */ 3790 init_filename_language_table (); 3791 add_setshow_string_noescape_cmd ("extension-language", class_files, 3792 &ext_args, _("\ 3793 Set mapping between filename extension and source language."), _("\ 3794 Show mapping between filename extension and source language."), _("\ 3795 Usage: set extension-language .foo bar"), 3796 set_ext_lang_command, 3797 show_ext_args, 3798 &setlist, &showlist); 3799 3800 add_info ("extensions", info_ext_lang_command, 3801 _("All filename extensions associated with a source language.")); 3802 3803 add_setshow_optional_filename_cmd ("debug-file-directory", class_support, 3804 &debug_file_directory, _("\ 3805 Set the directories where separate debug symbols are searched for."), _("\ 3806 Show the directories where separate debug symbols are searched for."), _("\ 3807 Separate debug symbols are first searched for in the same\n\ 3808 directory as the binary, then in the `" DEBUG_SUBDIRECTORY "' subdirectory,\n\ 3809 and lastly at the path of the directory of the binary with\n\ 3810 each global debug-file-directory component prepended."), 3811 NULL, 3812 show_debug_file_directory, 3813 &setlist, &showlist); 3814 } 3815