1/* Generic symbol file reading for the GNU debugger, GDB. 2 3 Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 4 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 5 Free Software Foundation, Inc. 6 7 Contributed by Cygnus Support, using pieces from other GDB modules. 8 9 This file is part of GDB. 10 11 This program is free software; you can redistribute it and/or modify 12 it under the terms of the GNU General Public License as published by 13 the Free Software Foundation; either version 3 of the License, or 14 (at your option) any later version. 15 16 This program is distributed in the hope that it will be useful, 17 but WITHOUT ANY WARRANTY; without even the implied warranty of 18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 19 GNU General Public License for more details. 20 21 You should have received a copy of the GNU General Public License 22 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 23 24#include "defs.h" 25#include "bfdlink.h" 26#include "symtab.h" 27#include "gdbtypes.h" 28#include "gdbcore.h" 29#include "frame.h" 30#include "target.h" 31#include "value.h" 32#include "symfile.h" 33#include "objfiles.h" 34#include "source.h" 35#include "gdbcmd.h" 36#include "breakpoint.h" 37#include "language.h" 38#include "complaints.h" 39#include "demangle.h" 40#include "inferior.h" /* for write_pc */ 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 56#include <sys/types.h> 57#include <fcntl.h> 58#include "gdb_string.h" 59#include "gdb_stat.h" 60#include <ctype.h> 61#include <time.h> 62#include <sys/time.h> 63 64 65int (*deprecated_ui_load_progress_hook) (const char *section, unsigned long num); 66void (*deprecated_show_load_progress) (const char *section, 67 unsigned long section_sent, 68 unsigned long section_size, 69 unsigned long total_sent, 70 unsigned long total_size); 71void (*deprecated_pre_add_symbol_hook) (const char *); 72void (*deprecated_post_add_symbol_hook) (void); 73 74static void clear_symtab_users_cleanup (void *ignore); 75 76/* Global variables owned by this file */ 77int readnow_symbol_files; /* Read full symbols immediately */ 78 79/* External variables and functions referenced. */ 80 81extern void report_transfer_performance (unsigned long, time_t, time_t); 82 83/* Functions this file defines */ 84 85#if 0 86static int simple_read_overlay_region_table (void); 87static void simple_free_overlay_region_table (void); 88#endif 89 90static void set_initial_language (void); 91 92static void load_command (char *, int); 93 94static void symbol_file_add_main_1 (char *args, int from_tty, int flags); 95 96static void add_symbol_file_command (char *, int); 97 98static void add_shared_symbol_files_command (char *, int); 99 100static void reread_separate_symbols (struct objfile *objfile); 101 102static void cashier_psymtab (struct partial_symtab *); 103 104bfd *symfile_bfd_open (char *); 105 106int get_section_index (struct objfile *, char *); 107 108static struct sym_fns *find_sym_fns (bfd *); 109 110static void decrement_reading_symtab (void *); 111 112static void overlay_invalidate_all (void); 113 114static int overlay_is_mapped (struct obj_section *); 115 116void list_overlays_command (char *, int); 117 118void map_overlay_command (char *, int); 119 120void unmap_overlay_command (char *, int); 121 122static void overlay_auto_command (char *, int); 123 124static void overlay_manual_command (char *, int); 125 126static void overlay_off_command (char *, int); 127 128static void overlay_load_command (char *, int); 129 130static void overlay_command (char *, int); 131 132static void simple_free_overlay_table (void); 133 134static void read_target_long_array (CORE_ADDR, unsigned int *, int); 135 136static int simple_read_overlay_table (void); 137 138static int simple_overlay_update_1 (struct obj_section *); 139 140static void add_filename_language (char *ext, enum language lang); 141 142static void info_ext_lang_command (char *args, int from_tty); 143 144static char *find_separate_debug_file (struct objfile *objfile); 145 146static void init_filename_language_table (void); 147 148static void symfile_find_segment_sections (struct objfile *objfile); 149 150void _initialize_symfile (void); 151 152/* List of all available sym_fns. On gdb startup, each object file reader 153 calls add_symtab_fns() to register information on each format it is 154 prepared to read. */ 155 156static struct sym_fns *symtab_fns = NULL; 157 158/* Flag for whether user will be reloading symbols multiple times. 159 Defaults to ON for VxWorks, otherwise OFF. */ 160 161#ifdef SYMBOL_RELOADING_DEFAULT 162int symbol_reloading = SYMBOL_RELOADING_DEFAULT; 163#else 164int symbol_reloading = 0; 165#endif 166static void 167show_symbol_reloading (struct ui_file *file, int from_tty, 168 struct cmd_list_element *c, const char *value) 169{ 170 fprintf_filtered (file, _("\ 171Dynamic symbol table reloading multiple times in one run is %s.\n"), 172 value); 173} 174 175 176/* If non-zero, shared library symbols will be added automatically 177 when the inferior is created, new libraries are loaded, or when 178 attaching to the inferior. This is almost always what users will 179 want to have happen; but for very large programs, the startup time 180 will be excessive, and so if this is a problem, the user can clear 181 this flag and then add the shared library symbols as needed. Note 182 that there is a potential for confusion, since if the shared 183 library symbols are not loaded, commands like "info fun" will *not* 184 report all the functions that are actually present. */ 185 186int auto_solib_add = 1; 187 188/* For systems that support it, a threshold size in megabytes. If 189 automatically adding a new library's symbol table to those already 190 known to the debugger would cause the total shared library symbol 191 size to exceed this threshhold, then the shlib's symbols are not 192 added. The threshold is ignored if the user explicitly asks for a 193 shlib to be added, such as when using the "sharedlibrary" 194 command. */ 195 196int auto_solib_limit; 197 198 199/* This compares two partial symbols by names, using strcmp_iw_ordered 200 for the comparison. */ 201 202static int 203compare_psymbols (const void *s1p, const void *s2p) 204{ 205 struct partial_symbol *const *s1 = s1p; 206 struct partial_symbol *const *s2 = s2p; 207 208 return strcmp_iw_ordered (SYMBOL_SEARCH_NAME (*s1), 209 SYMBOL_SEARCH_NAME (*s2)); 210} 211 212void 213sort_pst_symbols (struct partial_symtab *pst) 214{ 215 /* Sort the global list; don't sort the static list */ 216 217 qsort (pst->objfile->global_psymbols.list + pst->globals_offset, 218 pst->n_global_syms, sizeof (struct partial_symbol *), 219 compare_psymbols); 220} 221 222/* Make a null terminated copy of the string at PTR with SIZE characters in 223 the obstack pointed to by OBSTACKP . Returns the address of the copy. 224 Note that the string at PTR does not have to be null terminated, I.E. it 225 may be part of a larger string and we are only saving a substring. */ 226 227char * 228obsavestring (const char *ptr, int size, struct obstack *obstackp) 229{ 230 char *p = (char *) obstack_alloc (obstackp, size + 1); 231 /* Open-coded memcpy--saves function call time. These strings are usually 232 short. FIXME: Is this really still true with a compiler that can 233 inline memcpy? */ 234 { 235 const char *p1 = ptr; 236 char *p2 = p; 237 const char *end = ptr + size; 238 while (p1 != end) 239 *p2++ = *p1++; 240 } 241 p[size] = 0; 242 return p; 243} 244 245/* Concatenate strings S1, S2 and S3; return the new string. Space is found 246 in the obstack pointed to by OBSTACKP. */ 247 248char * 249obconcat (struct obstack *obstackp, const char *s1, const char *s2, 250 const char *s3) 251{ 252 int len = strlen (s1) + strlen (s2) + strlen (s3) + 1; 253 char *val = (char *) obstack_alloc (obstackp, len); 254 strcpy (val, s1); 255 strcat (val, s2); 256 strcat (val, s3); 257 return val; 258} 259 260/* True if we are nested inside psymtab_to_symtab. */ 261 262int currently_reading_symtab = 0; 263 264static void 265decrement_reading_symtab (void *dummy) 266{ 267 currently_reading_symtab--; 268} 269 270/* Get the symbol table that corresponds to a partial_symtab. 271 This is fast after the first time you do it. In fact, there 272 is an even faster macro PSYMTAB_TO_SYMTAB that does the fast 273 case inline. */ 274 275struct symtab * 276psymtab_to_symtab (struct partial_symtab *pst) 277{ 278 /* If it's been looked up before, return it. */ 279 if (pst->symtab) 280 return pst->symtab; 281 282 /* If it has not yet been read in, read it. */ 283 if (!pst->readin) 284 { 285 struct cleanup *back_to = make_cleanup (decrement_reading_symtab, NULL); 286 currently_reading_symtab++; 287 (*pst->read_symtab) (pst); 288 do_cleanups (back_to); 289 } 290 291 return pst->symtab; 292} 293 294/* Remember the lowest-addressed loadable section we've seen. 295 This function is called via bfd_map_over_sections. 296 297 In case of equal vmas, the section with the largest size becomes the 298 lowest-addressed loadable section. 299 300 If the vmas and sizes are equal, the last section is considered the 301 lowest-addressed loadable section. */ 302 303void 304find_lowest_section (bfd *abfd, asection *sect, void *obj) 305{ 306 asection **lowest = (asection **) obj; 307 308 if (0 == (bfd_get_section_flags (abfd, sect) & SEC_LOAD)) 309 return; 310 if (!*lowest) 311 *lowest = sect; /* First loadable section */ 312 else if (bfd_section_vma (abfd, *lowest) > bfd_section_vma (abfd, sect)) 313 *lowest = sect; /* A lower loadable section */ 314 else if (bfd_section_vma (abfd, *lowest) == bfd_section_vma (abfd, sect) 315 && (bfd_section_size (abfd, (*lowest)) 316 <= bfd_section_size (abfd, sect))) 317 *lowest = sect; 318} 319 320/* Create a new section_addr_info, with room for NUM_SECTIONS. */ 321 322struct section_addr_info * 323alloc_section_addr_info (size_t num_sections) 324{ 325 struct section_addr_info *sap; 326 size_t size; 327 328 size = (sizeof (struct section_addr_info) 329 + sizeof (struct other_sections) * (num_sections - 1)); 330 sap = (struct section_addr_info *) xmalloc (size); 331 memset (sap, 0, size); 332 sap->num_sections = num_sections; 333 334 return sap; 335} 336 337 338/* Return a freshly allocated copy of ADDRS. The section names, if 339 any, are also freshly allocated copies of those in ADDRS. */ 340struct section_addr_info * 341copy_section_addr_info (struct section_addr_info *addrs) 342{ 343 struct section_addr_info *copy 344 = alloc_section_addr_info (addrs->num_sections); 345 int i; 346 347 copy->num_sections = addrs->num_sections; 348 for (i = 0; i < addrs->num_sections; i++) 349 { 350 copy->other[i].addr = addrs->other[i].addr; 351 if (addrs->other[i].name) 352 copy->other[i].name = xstrdup (addrs->other[i].name); 353 else 354 copy->other[i].name = NULL; 355 copy->other[i].sectindex = addrs->other[i].sectindex; 356 } 357 358 return copy; 359} 360 361 362 363/* Build (allocate and populate) a section_addr_info struct from 364 an existing section table. */ 365 366extern struct section_addr_info * 367build_section_addr_info_from_section_table (const struct section_table *start, 368 const struct section_table *end) 369{ 370 struct section_addr_info *sap; 371 const struct section_table *stp; 372 int oidx; 373 374 sap = alloc_section_addr_info (end - start); 375 376 for (stp = start, oidx = 0; stp != end; stp++) 377 { 378 if (bfd_get_section_flags (stp->bfd, 379 stp->the_bfd_section) & (SEC_ALLOC | SEC_LOAD) 380 && oidx < end - start) 381 { 382 sap->other[oidx].addr = stp->addr; 383 sap->other[oidx].name 384 = xstrdup (bfd_section_name (stp->bfd, stp->the_bfd_section)); 385 sap->other[oidx].sectindex = stp->the_bfd_section->index; 386 oidx++; 387 } 388 } 389 390 return sap; 391} 392 393 394/* Free all memory allocated by build_section_addr_info_from_section_table. */ 395 396extern void 397free_section_addr_info (struct section_addr_info *sap) 398{ 399 int idx; 400 401 for (idx = 0; idx < sap->num_sections; idx++) 402 if (sap->other[idx].name) 403 xfree (sap->other[idx].name); 404 xfree (sap); 405} 406 407 408/* Initialize OBJFILE's sect_index_* members. */ 409static void 410init_objfile_sect_indices (struct objfile *objfile) 411{ 412 asection *sect; 413 int i; 414 415 sect = bfd_get_section_by_name (objfile->obfd, ".text"); 416 if (sect) 417 objfile->sect_index_text = sect->index; 418 419 sect = bfd_get_section_by_name (objfile->obfd, ".data"); 420 if (sect) 421 objfile->sect_index_data = sect->index; 422 423 sect = bfd_get_section_by_name (objfile->obfd, ".bss"); 424 if (sect) 425 objfile->sect_index_bss = sect->index; 426 427 sect = bfd_get_section_by_name (objfile->obfd, ".rodata"); 428 if (sect) 429 objfile->sect_index_rodata = sect->index; 430 431 /* This is where things get really weird... We MUST have valid 432 indices for the various sect_index_* members or gdb will abort. 433 So if for example, there is no ".text" section, we have to 434 accomodate that. First, check for a file with the standard 435 one or two segments. */ 436 437 symfile_find_segment_sections (objfile); 438 439 /* Except when explicitly adding symbol files at some address, 440 section_offsets contains nothing but zeros, so it doesn't matter 441 which slot in section_offsets the individual sect_index_* members 442 index into. So if they are all zero, it is safe to just point 443 all the currently uninitialized indices to the first slot. But 444 beware: if this is the main executable, it may be relocated 445 later, e.g. by the remote qOffsets packet, and then this will 446 be wrong! That's why we try segments first. */ 447 448 for (i = 0; i < objfile->num_sections; i++) 449 { 450 if (ANOFFSET (objfile->section_offsets, i) != 0) 451 { 452 break; 453 } 454 } 455 if (i == objfile->num_sections) 456 { 457 if (objfile->sect_index_text == -1) 458 objfile->sect_index_text = 0; 459 if (objfile->sect_index_data == -1) 460 objfile->sect_index_data = 0; 461 if (objfile->sect_index_bss == -1) 462 objfile->sect_index_bss = 0; 463 if (objfile->sect_index_rodata == -1) 464 objfile->sect_index_rodata = 0; 465 } 466} 467 468/* The arguments to place_section. */ 469 470struct place_section_arg 471{ 472 struct section_offsets *offsets; 473 CORE_ADDR lowest; 474}; 475 476/* Find a unique offset to use for loadable section SECT if 477 the user did not provide an offset. */ 478 479void 480place_section (bfd *abfd, asection *sect, void *obj) 481{ 482 struct place_section_arg *arg = obj; 483 CORE_ADDR *offsets = arg->offsets->offsets, start_addr; 484 int done; 485 ULONGEST align = ((ULONGEST) 1) << bfd_get_section_alignment (abfd, sect); 486 487 /* We are only interested in allocated sections. */ 488 if ((bfd_get_section_flags (abfd, sect) & SEC_ALLOC) == 0) 489 return; 490 491 /* If the user specified an offset, honor it. */ 492 if (offsets[sect->index] != 0) 493 return; 494 495 /* Otherwise, let's try to find a place for the section. */ 496 start_addr = (arg->lowest + align - 1) & -align; 497 498 do { 499 asection *cur_sec; 500 501 done = 1; 502 503 for (cur_sec = abfd->sections; cur_sec != NULL; cur_sec = cur_sec->next) 504 { 505 int indx = cur_sec->index; 506 CORE_ADDR cur_offset; 507 508 /* We don't need to compare against ourself. */ 509 if (cur_sec == sect) 510 continue; 511 512 /* We can only conflict with allocated sections. */ 513 if ((bfd_get_section_flags (abfd, cur_sec) & SEC_ALLOC) == 0) 514 continue; 515 516 /* If the section offset is 0, either the section has not been placed 517 yet, or it was the lowest section placed (in which case LOWEST 518 will be past its end). */ 519 if (offsets[indx] == 0) 520 continue; 521 522 /* If this section would overlap us, then we must move up. */ 523 if (start_addr + bfd_get_section_size (sect) > offsets[indx] 524 && start_addr < offsets[indx] + bfd_get_section_size (cur_sec)) 525 { 526 start_addr = offsets[indx] + bfd_get_section_size (cur_sec); 527 start_addr = (start_addr + align - 1) & -align; 528 done = 0; 529 break; 530 } 531 532 /* Otherwise, we appear to be OK. So far. */ 533 } 534 } 535 while (!done); 536 537 offsets[sect->index] = start_addr; 538 arg->lowest = start_addr + bfd_get_section_size (sect); 539 540 exec_set_section_address (bfd_get_filename (abfd), sect->index, start_addr); 541} 542 543/* Parse the user's idea of an offset for dynamic linking, into our idea 544 of how to represent it for fast symbol reading. This is the default 545 version of the sym_fns.sym_offsets function for symbol readers that 546 don't need to do anything special. It allocates a section_offsets table 547 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */ 548 549void 550default_symfile_offsets (struct objfile *objfile, 551 struct section_addr_info *addrs) 552{ 553 int i; 554 555 objfile->num_sections = bfd_count_sections (objfile->obfd); 556 objfile->section_offsets = (struct section_offsets *) 557 obstack_alloc (&objfile->objfile_obstack, 558 SIZEOF_N_SECTION_OFFSETS (objfile->num_sections)); 559 memset (objfile->section_offsets, 0, 560 SIZEOF_N_SECTION_OFFSETS (objfile->num_sections)); 561 562 /* Now calculate offsets for section that were specified by the 563 caller. */ 564 for (i = 0; i < addrs->num_sections && addrs->other[i].name; i++) 565 { 566 struct other_sections *osp ; 567 568 osp = &addrs->other[i] ; 569 if (osp->addr == 0) 570 continue; 571 572 /* Record all sections in offsets */ 573 /* The section_offsets in the objfile are here filled in using 574 the BFD index. */ 575 (objfile->section_offsets)->offsets[osp->sectindex] = osp->addr; 576 } 577 578 /* For relocatable files, all loadable sections will start at zero. 579 The zero is meaningless, so try to pick arbitrary addresses such 580 that no loadable sections overlap. This algorithm is quadratic, 581 but the number of sections in a single object file is generally 582 small. */ 583 if ((bfd_get_file_flags (objfile->obfd) & (EXEC_P | DYNAMIC)) == 0) 584 { 585 struct place_section_arg arg; 586 bfd *abfd = objfile->obfd; 587 asection *cur_sec; 588 CORE_ADDR lowest = 0; 589 590 for (cur_sec = abfd->sections; cur_sec != NULL; cur_sec = cur_sec->next) 591 /* We do not expect this to happen; just skip this step if the 592 relocatable file has a section with an assigned VMA. */ 593 if (bfd_section_vma (abfd, cur_sec) != 0) 594 break; 595 596 if (cur_sec == NULL) 597 { 598 CORE_ADDR *offsets = objfile->section_offsets->offsets; 599 600 /* Pick non-overlapping offsets for sections the user did not 601 place explicitly. */ 602 arg.offsets = objfile->section_offsets; 603 arg.lowest = 0; 604 bfd_map_over_sections (objfile->obfd, place_section, &arg); 605 606 /* Correctly filling in the section offsets is not quite 607 enough. Relocatable files have two properties that 608 (most) shared objects do not: 609 610 - Their debug information will contain relocations. Some 611 shared libraries do also, but many do not, so this can not 612 be assumed. 613 614 - If there are multiple code sections they will be loaded 615 at different relative addresses in memory than they are 616 in the objfile, since all sections in the file will start 617 at address zero. 618 619 Because GDB has very limited ability to map from an 620 address in debug info to the correct code section, 621 it relies on adding SECT_OFF_TEXT to things which might be 622 code. If we clear all the section offsets, and set the 623 section VMAs instead, then symfile_relocate_debug_section 624 will return meaningful debug information pointing at the 625 correct sections. 626 627 GDB has too many different data structures for section 628 addresses - a bfd, objfile, and so_list all have section 629 tables, as does exec_ops. Some of these could probably 630 be eliminated. */ 631 632 for (cur_sec = abfd->sections; cur_sec != NULL; 633 cur_sec = cur_sec->next) 634 { 635 if ((bfd_get_section_flags (abfd, cur_sec) & SEC_ALLOC) == 0) 636 continue; 637 638 bfd_set_section_vma (abfd, cur_sec, offsets[cur_sec->index]); 639 offsets[cur_sec->index] = 0; 640 } 641 } 642 } 643 644 /* Remember the bfd indexes for the .text, .data, .bss and 645 .rodata sections. */ 646 init_objfile_sect_indices (objfile); 647} 648 649 650/* Divide the file into segments, which are individual relocatable units. 651 This is the default version of the sym_fns.sym_segments function for 652 symbol readers that do not have an explicit representation of segments. 653 It assumes that object files do not have segments, and fully linked 654 files have a single segment. */ 655 656struct symfile_segment_data * 657default_symfile_segments (bfd *abfd) 658{ 659 int num_sections, i; 660 asection *sect; 661 struct symfile_segment_data *data; 662 CORE_ADDR low, high; 663 664 /* Relocatable files contain enough information to position each 665 loadable section independently; they should not be relocated 666 in segments. */ 667 if ((bfd_get_file_flags (abfd) & (EXEC_P | DYNAMIC)) == 0) 668 return NULL; 669 670 /* Make sure there is at least one loadable section in the file. */ 671 for (sect = abfd->sections; sect != NULL; sect = sect->next) 672 { 673 if ((bfd_get_section_flags (abfd, sect) & SEC_ALLOC) == 0) 674 continue; 675 676 break; 677 } 678 if (sect == NULL) 679 return NULL; 680 681 low = bfd_get_section_vma (abfd, sect); 682 high = low + bfd_get_section_size (sect); 683 684 data = XZALLOC (struct symfile_segment_data); 685 data->num_segments = 1; 686 data->segment_bases = XCALLOC (1, CORE_ADDR); 687 data->segment_sizes = XCALLOC (1, CORE_ADDR); 688 689 num_sections = bfd_count_sections (abfd); 690 data->segment_info = XCALLOC (num_sections, int); 691 692 for (i = 0, sect = abfd->sections; sect != NULL; i++, sect = sect->next) 693 { 694 CORE_ADDR vma; 695 696 if ((bfd_get_section_flags (abfd, sect) & SEC_ALLOC) == 0) 697 continue; 698 699 vma = bfd_get_section_vma (abfd, sect); 700 if (vma < low) 701 low = vma; 702 if (vma + bfd_get_section_size (sect) > high) 703 high = vma + bfd_get_section_size (sect); 704 705 data->segment_info[i] = 1; 706 } 707 708 data->segment_bases[0] = low; 709 data->segment_sizes[0] = high - low; 710 711 return data; 712} 713 714/* Process a symbol file, as either the main file or as a dynamically 715 loaded file. 716 717 OBJFILE is where the symbols are to be read from. 718 719 ADDRS is the list of section load addresses. If the user has given 720 an 'add-symbol-file' command, then this is the list of offsets and 721 addresses he or she provided as arguments to the command; or, if 722 we're handling a shared library, these are the actual addresses the 723 sections are loaded at, according to the inferior's dynamic linker 724 (as gleaned by GDB's shared library code). We convert each address 725 into an offset from the section VMA's as it appears in the object 726 file, and then call the file's sym_offsets function to convert this 727 into a format-specific offset table --- a `struct section_offsets'. 728 If ADDRS is non-zero, OFFSETS must be zero. 729 730 OFFSETS is a table of section offsets already in the right 731 format-specific representation. NUM_OFFSETS is the number of 732 elements present in OFFSETS->offsets. If OFFSETS is non-zero, we 733 assume this is the proper table the call to sym_offsets described 734 above would produce. Instead of calling sym_offsets, we just dump 735 it right into objfile->section_offsets. (When we're re-reading 736 symbols from an objfile, we don't have the original load address 737 list any more; all we have is the section offset table.) If 738 OFFSETS is non-zero, ADDRS must be zero. 739 740 MAINLINE is nonzero if this is the main symbol file, or zero if 741 it's an extra symbol file such as dynamically loaded code. 742 743 VERBO is nonzero if the caller has printed a verbose message about 744 the symbol reading (and complaints can be more terse about it). */ 745 746void 747syms_from_objfile (struct objfile *objfile, 748 struct section_addr_info *addrs, 749 struct section_offsets *offsets, 750 int num_offsets, 751 int mainline, 752 int verbo) 753{ 754 struct section_addr_info *local_addr = NULL; 755 struct cleanup *old_chain; 756 757 gdb_assert (! (addrs && offsets)); 758 759 init_entry_point_info (objfile); 760 objfile->sf = find_sym_fns (objfile->obfd); 761 762 if (objfile->sf == NULL) 763 return; /* No symbols. */ 764 765 /* Make sure that partially constructed symbol tables will be cleaned up 766 if an error occurs during symbol reading. */ 767 old_chain = make_cleanup_free_objfile (objfile); 768 769 /* If ADDRS and OFFSETS are both NULL, put together a dummy address 770 list. We now establish the convention that an addr of zero means 771 no load address was specified. */ 772 if (! addrs && ! offsets) 773 { 774 local_addr 775 = alloc_section_addr_info (bfd_count_sections (objfile->obfd)); 776 make_cleanup (xfree, local_addr); 777 addrs = local_addr; 778 } 779 780 /* Now either addrs or offsets is non-zero. */ 781 782 if (mainline) 783 { 784 /* We will modify the main symbol table, make sure that all its users 785 will be cleaned up if an error occurs during symbol reading. */ 786 make_cleanup (clear_symtab_users_cleanup, 0 /*ignore*/); 787 788 /* Since no error yet, throw away the old symbol table. */ 789 790 if (symfile_objfile != NULL) 791 { 792 free_objfile (symfile_objfile); 793 symfile_objfile = NULL; 794 } 795 796 /* Currently we keep symbols from the add-symbol-file command. 797 If the user wants to get rid of them, they should do "symbol-file" 798 without arguments first. Not sure this is the best behavior 799 (PR 2207). */ 800 801 (*objfile->sf->sym_new_init) (objfile); 802 } 803 804 /* Convert addr into an offset rather than an absolute address. 805 We find the lowest address of a loaded segment in the objfile, 806 and assume that <addr> is where that got loaded. 807 808 We no longer warn if the lowest section is not a text segment (as 809 happens for the PA64 port. */ 810 if (!mainline && addrs && addrs->other[0].name) 811 { 812 asection *lower_sect; 813 asection *sect; 814 CORE_ADDR lower_offset; 815 int i; 816 817 /* Find lowest loadable section to be used as starting point for 818 continguous sections. FIXME!! won't work without call to find 819 .text first, but this assumes text is lowest section. */ 820 lower_sect = bfd_get_section_by_name (objfile->obfd, ".text"); 821 if (lower_sect == NULL) 822 bfd_map_over_sections (objfile->obfd, find_lowest_section, 823 &lower_sect); 824 if (lower_sect == NULL) 825 warning (_("no loadable sections found in added symbol-file %s"), 826 objfile->name); 827 else 828 if ((bfd_get_section_flags (objfile->obfd, lower_sect) & SEC_CODE) == 0) 829 warning (_("Lowest section in %s is %s at %s"), 830 objfile->name, 831 bfd_section_name (objfile->obfd, lower_sect), 832 paddr (bfd_section_vma (objfile->obfd, lower_sect))); 833 if (lower_sect != NULL) 834 lower_offset = bfd_section_vma (objfile->obfd, lower_sect); 835 else 836 lower_offset = 0; 837 838 /* Calculate offsets for the loadable sections. 839 FIXME! Sections must be in order of increasing loadable section 840 so that contiguous sections can use the lower-offset!!! 841 842 Adjust offsets if the segments are not contiguous. 843 If the section is contiguous, its offset should be set to 844 the offset of the highest loadable section lower than it 845 (the loadable section directly below it in memory). 846 this_offset = lower_offset = lower_addr - lower_orig_addr */ 847 848 for (i = 0; i < addrs->num_sections && addrs->other[i].name; i++) 849 { 850 if (addrs->other[i].addr != 0) 851 { 852 sect = bfd_get_section_by_name (objfile->obfd, 853 addrs->other[i].name); 854 if (sect) 855 { 856 addrs->other[i].addr 857 -= bfd_section_vma (objfile->obfd, sect); 858 lower_offset = addrs->other[i].addr; 859 /* This is the index used by BFD. */ 860 addrs->other[i].sectindex = sect->index ; 861 } 862 else 863 { 864 warning (_("section %s not found in %s"), 865 addrs->other[i].name, 866 objfile->name); 867 addrs->other[i].addr = 0; 868 } 869 } 870 else 871 addrs->other[i].addr = lower_offset; 872 } 873 } 874 875 /* Initialize symbol reading routines for this objfile, allow complaints to 876 appear for this new file, and record how verbose to be, then do the 877 initial symbol reading for this file. */ 878 879 (*objfile->sf->sym_init) (objfile); 880 clear_complaints (&symfile_complaints, 1, verbo); 881 882 if (addrs) 883 (*objfile->sf->sym_offsets) (objfile, addrs); 884 else 885 { 886 size_t size = SIZEOF_N_SECTION_OFFSETS (num_offsets); 887 888 /* Just copy in the offset table directly as given to us. */ 889 objfile->num_sections = num_offsets; 890 objfile->section_offsets 891 = ((struct section_offsets *) 892 obstack_alloc (&objfile->objfile_obstack, size)); 893 memcpy (objfile->section_offsets, offsets, size); 894 895 init_objfile_sect_indices (objfile); 896 } 897 898#ifndef DEPRECATED_IBM6000_TARGET 899 /* This is a SVR4/SunOS specific hack, I think. In any event, it 900 screws RS/6000. sym_offsets should be doing this sort of thing, 901 because it knows the mapping between bfd sections and 902 section_offsets. */ 903 /* This is a hack. As far as I can tell, section offsets are not 904 target dependent. They are all set to addr with a couple of 905 exceptions. The exceptions are sysvr4 shared libraries, whose 906 offsets are kept in solib structures anyway and rs6000 xcoff 907 which handles shared libraries in a completely unique way. 908 909 Section offsets are built similarly, except that they are built 910 by adding addr in all cases because there is no clear mapping 911 from section_offsets into actual sections. Note that solib.c 912 has a different algorithm for finding section offsets. 913 914 These should probably all be collapsed into some target 915 independent form of shared library support. FIXME. */ 916 917 if (addrs) 918 { 919 struct obj_section *s; 920 921 /* Map section offsets in "addr" back to the object's 922 sections by comparing the section names with bfd's 923 section names. Then adjust the section address by 924 the offset. */ /* for gdb/13815 */ 925 926 ALL_OBJFILE_OSECTIONS (objfile, s) 927 { 928 CORE_ADDR s_addr = 0; 929 int i; 930 931 for (i = 0; 932 !s_addr && i < addrs->num_sections && addrs->other[i].name; 933 i++) 934 if (strcmp (bfd_section_name (s->objfile->obfd, 935 s->the_bfd_section), 936 addrs->other[i].name) == 0) 937 s_addr = addrs->other[i].addr; /* end added for gdb/13815 */ 938 939 s->addr -= s->offset; 940 s->addr += s_addr; 941 s->endaddr -= s->offset; 942 s->endaddr += s_addr; 943 s->offset += s_addr; 944 } 945 } 946#endif /* not DEPRECATED_IBM6000_TARGET */ 947 948 (*objfile->sf->sym_read) (objfile, mainline); 949 950 /* Don't allow char * to have a typename (else would get caddr_t). 951 Ditto void *. FIXME: Check whether this is now done by all the 952 symbol readers themselves (many of them now do), and if so remove 953 it from here. */ 954 955 TYPE_NAME (lookup_pointer_type (builtin_type_char)) = 0; 956 TYPE_NAME (lookup_pointer_type (builtin_type_void)) = 0; 957 958 /* Mark the objfile has having had initial symbol read attempted. Note 959 that this does not mean we found any symbols... */ 960 961 objfile->flags |= OBJF_SYMS; 962 963 /* Discard cleanups as symbol reading was successful. */ 964 965 discard_cleanups (old_chain); 966} 967 968/* Perform required actions after either reading in the initial 969 symbols for a new objfile, or mapping in the symbols from a reusable 970 objfile. */ 971 972void 973new_symfile_objfile (struct objfile *objfile, int mainline, int verbo) 974{ 975 976 /* If this is the main symbol file we have to clean up all users of the 977 old main symbol file. Otherwise it is sufficient to fixup all the 978 breakpoints that may have been redefined by this symbol file. */ 979 if (mainline) 980 { 981 /* OK, make it the "real" symbol file. */ 982 symfile_objfile = objfile; 983 984 clear_symtab_users (); 985 } 986 else 987 { 988 breakpoint_re_set (); 989 } 990 991 /* We're done reading the symbol file; finish off complaints. */ 992 clear_complaints (&symfile_complaints, 0, verbo); 993} 994 995/* Process a symbol file, as either the main file or as a dynamically 996 loaded file. 997 998 ABFD is a BFD already open on the file, as from symfile_bfd_open. 999 This BFD will be closed on error, and is always consumed by this function. 1000 1001 FROM_TTY says how verbose to be. 1002 1003 MAINLINE specifies whether this is the main symbol file, or whether 1004 it's an extra symbol file such as dynamically loaded code. 1005 1006 ADDRS, OFFSETS, and NUM_OFFSETS are as described for 1007 syms_from_objfile, above. ADDRS is ignored when MAINLINE is 1008 non-zero. 1009 1010 Upon success, returns a pointer to the objfile that was added. 1011 Upon failure, jumps back to command level (never returns). */ 1012static struct objfile * 1013symbol_file_add_with_addrs_or_offsets (bfd *abfd, int from_tty, 1014 struct section_addr_info *addrs, 1015 struct section_offsets *offsets, 1016 int num_offsets, 1017 int mainline, int flags) 1018{ 1019 struct objfile *objfile; 1020 struct partial_symtab *psymtab; 1021 char *debugfile = NULL; 1022 struct section_addr_info *orig_addrs = NULL; 1023 struct cleanup *my_cleanups; 1024 const char *name = bfd_get_filename (abfd); 1025 1026 my_cleanups = make_cleanup_bfd_close (abfd); 1027 1028 /* Give user a chance to burp if we'd be 1029 interactively wiping out any existing symbols. */ 1030 1031 if ((have_full_symbols () || have_partial_symbols ()) 1032 && mainline 1033 && from_tty 1034 && !query ("Load new symbol table from \"%s\"? ", name)) 1035 error (_("Not confirmed.")); 1036 1037 objfile = allocate_objfile (abfd, flags); 1038 discard_cleanups (my_cleanups); 1039 1040 if (addrs) 1041 { 1042 orig_addrs = copy_section_addr_info (addrs); 1043 make_cleanup_free_section_addr_info (orig_addrs); 1044 } 1045 1046 /* We either created a new mapped symbol table, mapped an existing 1047 symbol table file which has not had initial symbol reading 1048 performed, or need to read an unmapped symbol table. */ 1049 if (from_tty || info_verbose) 1050 { 1051 if (deprecated_pre_add_symbol_hook) 1052 deprecated_pre_add_symbol_hook (name); 1053 else 1054 { 1055 printf_unfiltered (_("Reading symbols from %s..."), name); 1056 wrap_here (""); 1057 gdb_flush (gdb_stdout); 1058 } 1059 } 1060 syms_from_objfile (objfile, addrs, offsets, num_offsets, 1061 mainline, from_tty); 1062 1063 /* We now have at least a partial symbol table. Check to see if the 1064 user requested that all symbols be read on initial access via either 1065 the gdb startup command line or on a per symbol file basis. Expand 1066 all partial symbol tables for this objfile if so. */ 1067 1068 if ((flags & OBJF_READNOW) || readnow_symbol_files) 1069 { 1070 if (from_tty || info_verbose) 1071 { 1072 printf_unfiltered (_("expanding to full symbols...")); 1073 wrap_here (""); 1074 gdb_flush (gdb_stdout); 1075 } 1076 1077 for (psymtab = objfile->psymtabs; 1078 psymtab != NULL; 1079 psymtab = psymtab->next) 1080 { 1081 psymtab_to_symtab (psymtab); 1082 } 1083 } 1084 1085 /* If the file has its own symbol tables it has no separate debug info. 1086 `.dynsym'/`.symtab' go to MSYMBOLS, `.debug_info' goes to SYMTABS/PSYMTABS. 1087 `.gnu_debuglink' may no longer be present with `.note.gnu.build-id'. */ 1088 if (objfile->psymtabs == NULL) 1089 debugfile = find_separate_debug_file (objfile); 1090 if (debugfile) 1091 { 1092 if (addrs != NULL) 1093 { 1094 objfile->separate_debug_objfile 1095 = symbol_file_add (debugfile, from_tty, orig_addrs, 0, flags); 1096 } 1097 else 1098 { 1099 objfile->separate_debug_objfile 1100 = symbol_file_add (debugfile, from_tty, NULL, 0, flags); 1101 } 1102 objfile->separate_debug_objfile->separate_debug_objfile_backlink 1103 = objfile; 1104 1105 /* Put the separate debug object before the normal one, this is so that 1106 usage of the ALL_OBJFILES_SAFE macro will stay safe. */ 1107 put_objfile_before (objfile->separate_debug_objfile, objfile); 1108 1109 xfree (debugfile); 1110 } 1111 1112 if (!have_partial_symbols () && !have_full_symbols ()) 1113 { 1114 wrap_here (""); 1115 printf_filtered (_("(no debugging symbols found)")); 1116 if (from_tty || info_verbose) 1117 printf_filtered ("..."); 1118 else 1119 printf_filtered ("\n"); 1120 wrap_here (""); 1121 } 1122 1123 if (from_tty || info_verbose) 1124 { 1125 if (deprecated_post_add_symbol_hook) 1126 deprecated_post_add_symbol_hook (); 1127 else 1128 { 1129 printf_unfiltered (_("done.\n")); 1130 } 1131 } 1132 1133 /* We print some messages regardless of whether 'from_tty || 1134 info_verbose' is true, so make sure they go out at the right 1135 time. */ 1136 gdb_flush (gdb_stdout); 1137 1138 do_cleanups (my_cleanups); 1139 1140 if (objfile->sf == NULL) 1141 return objfile; /* No symbols. */ 1142 1143 new_symfile_objfile (objfile, mainline, from_tty); 1144 1145 observer_notify_new_objfile (objfile); 1146 1147 bfd_cache_close_all (); 1148 return (objfile); 1149} 1150 1151 1152/* Process the symbol file ABFD, as either the main file or as a 1153 dynamically loaded file. 1154 1155 See symbol_file_add_with_addrs_or_offsets's comments for 1156 details. */ 1157struct objfile * 1158symbol_file_add_from_bfd (bfd *abfd, int from_tty, 1159 struct section_addr_info *addrs, 1160 int mainline, int flags) 1161{ 1162 return symbol_file_add_with_addrs_or_offsets (abfd, 1163 from_tty, addrs, 0, 0, 1164 mainline, flags); 1165} 1166 1167 1168/* Process a symbol file, as either the main file or as a dynamically 1169 loaded file. See symbol_file_add_with_addrs_or_offsets's comments 1170 for details. */ 1171struct objfile * 1172symbol_file_add (char *name, int from_tty, struct section_addr_info *addrs, 1173 int mainline, int flags) 1174{ 1175 return symbol_file_add_from_bfd (symfile_bfd_open (name), from_tty, 1176 addrs, mainline, flags); 1177} 1178 1179 1180/* Call symbol_file_add() with default values and update whatever is 1181 affected by the loading of a new main(). 1182 Used when the file is supplied in the gdb command line 1183 and by some targets with special loading requirements. 1184 The auxiliary function, symbol_file_add_main_1(), has the flags 1185 argument for the switches that can only be specified in the symbol_file 1186 command itself. */ 1187 1188void 1189symbol_file_add_main (char *args, int from_tty) 1190{ 1191 symbol_file_add_main_1 (args, from_tty, 0); 1192} 1193 1194static void 1195symbol_file_add_main_1 (char *args, int from_tty, int flags) 1196{ 1197 symbol_file_add (args, from_tty, NULL, 1, flags); 1198 1199 /* Getting new symbols may change our opinion about 1200 what is frameless. */ 1201 reinit_frame_cache (); 1202 1203 set_initial_language (); 1204} 1205 1206void 1207symbol_file_clear (int from_tty) 1208{ 1209 if ((have_full_symbols () || have_partial_symbols ()) 1210 && from_tty 1211 && (symfile_objfile 1212 ? !query (_("Discard symbol table from `%s'? "), 1213 symfile_objfile->name) 1214 : !query (_("Discard symbol table? ")))) 1215 error (_("Not confirmed.")); 1216 free_all_objfiles (); 1217 1218 /* solib descriptors may have handles to objfiles. Since their 1219 storage has just been released, we'd better wipe the solib 1220 descriptors as well. 1221 */ 1222#if defined(SOLIB_RESTART) 1223 SOLIB_RESTART (); 1224#endif 1225 1226 symfile_objfile = NULL; 1227 if (from_tty) 1228 printf_unfiltered (_("No symbol file now.\n")); 1229} 1230 1231struct build_id 1232 { 1233 size_t size; 1234 gdb_byte data[1]; 1235 }; 1236 1237/* Locate NT_GNU_BUILD_ID from ABFD and return its content. */ 1238 1239static struct build_id * 1240build_id_bfd_get (bfd *abfd) 1241{ 1242 struct build_id *retval; 1243 1244 if (!bfd_check_format (abfd, bfd_object) 1245 || bfd_get_flavour (abfd) != bfd_target_elf_flavour 1246 || elf_tdata (abfd)->build_id == NULL) 1247 return NULL; 1248 1249 retval = xmalloc (sizeof *retval - 1 + elf_tdata (abfd)->build_id_size); 1250 retval->size = elf_tdata (abfd)->build_id_size; 1251 memcpy (retval->data, elf_tdata (abfd)->build_id, retval->size); 1252 1253 return retval; 1254} 1255 1256/* Return if FILENAME has NT_GNU_BUILD_ID matching the CHECK value. */ 1257 1258static int 1259build_id_verify (const char *filename, struct build_id *check) 1260{ 1261 bfd *abfd; 1262 struct build_id *found = NULL; 1263 int retval = 0; 1264 1265 /* We expect to be silent on the non-existing files. */ 1266 abfd = bfd_openr (filename, gnutarget); 1267 if (abfd == NULL) 1268 return 0; 1269 1270 found = build_id_bfd_get (abfd); 1271 1272 if (found == NULL) 1273 warning (_("File \"%s\" has no build-id, file skipped"), filename); 1274 else if (found->size != check->size 1275 || memcmp (found->data, check->data, found->size) != 0) 1276 warning (_("File \"%s\" has a different build-id, file skipped"), filename); 1277 else 1278 retval = 1; 1279 1280 if (!bfd_close (abfd)) 1281 warning (_("cannot close \"%s\": %s"), filename, 1282 bfd_errmsg (bfd_get_error ())); 1283 return retval; 1284} 1285 1286static char * 1287build_id_to_debug_filename (struct build_id *build_id) 1288{ 1289 char *link, *s, *retval = NULL; 1290 gdb_byte *data = build_id->data; 1291 size_t size = build_id->size; 1292 1293 /* DEBUG_FILE_DIRECTORY/.build-id/ab/cdef */ 1294 link = xmalloc (strlen (debug_file_directory) + (sizeof "/.build-id/" - 1) + 1 1295 + 2 * size + (sizeof ".debug" - 1) + 1); 1296 s = link + sprintf (link, "%s/.build-id/", debug_file_directory); 1297 if (size > 0) 1298 { 1299 size--; 1300 s += sprintf (s, "%02x", (unsigned) *data++); 1301 } 1302 if (size > 0) 1303 *s++ = '/'; 1304 while (size-- > 0) 1305 s += sprintf (s, "%02x", (unsigned) *data++); 1306 strcpy (s, ".debug"); 1307 1308 /* lrealpath() is expensive even for the usually non-existent files. */ 1309 if (access (link, F_OK) == 0) 1310 retval = lrealpath (link); 1311 xfree (link); 1312 1313 if (retval != NULL && !build_id_verify (retval, build_id)) 1314 { 1315 xfree (retval); 1316 retval = NULL; 1317 } 1318 1319 return retval; 1320} 1321 1322static char * 1323get_debug_link_info (struct objfile *objfile, unsigned long *crc32_out) 1324{ 1325 asection *sect; 1326 bfd_size_type debuglink_size; 1327 unsigned long crc32; 1328 char *contents; 1329 int crc_offset; 1330 unsigned char *p; 1331 1332 sect = bfd_get_section_by_name (objfile->obfd, ".gnu_debuglink"); 1333 1334 if (sect == NULL) 1335 return NULL; 1336 1337 debuglink_size = bfd_section_size (objfile->obfd, sect); 1338 1339 contents = xmalloc (debuglink_size); 1340 bfd_get_section_contents (objfile->obfd, sect, contents, 1341 (file_ptr)0, (bfd_size_type)debuglink_size); 1342 1343 /* Crc value is stored after the filename, aligned up to 4 bytes. */ 1344 crc_offset = strlen (contents) + 1; 1345 crc_offset = (crc_offset + 3) & ~3; 1346 1347 crc32 = bfd_get_32 (objfile->obfd, (bfd_byte *) (contents + crc_offset)); 1348 1349 *crc32_out = crc32; 1350 return contents; 1351} 1352 1353static int 1354separate_debug_file_exists (const char *name, unsigned long crc) 1355{ 1356 unsigned long file_crc = 0; 1357 int fd; 1358 gdb_byte buffer[8*1024]; 1359 int count; 1360 1361 fd = open (name, O_RDONLY | O_BINARY); 1362 if (fd < 0) 1363 return 0; 1364 1365 while ((count = read (fd, buffer, sizeof (buffer))) > 0) 1366 file_crc = gnu_debuglink_crc32 (file_crc, buffer, count); 1367 1368 close (fd); 1369 1370 return crc == file_crc; 1371} 1372 1373char *debug_file_directory = NULL; 1374static void 1375show_debug_file_directory (struct ui_file *file, int from_tty, 1376 struct cmd_list_element *c, const char *value) 1377{ 1378 fprintf_filtered (file, _("\ 1379The directory where separate debug symbols are searched for is \"%s\".\n"), 1380 value); 1381} 1382 1383#if ! defined (DEBUG_SUBDIRECTORY) 1384#define DEBUG_SUBDIRECTORY ".debug" 1385#endif 1386 1387static char * 1388find_separate_debug_file (struct objfile *objfile) 1389{ 1390 asection *sect; 1391 char *basename; 1392 char *dir; 1393 char *debugfile; 1394 char *name_copy; 1395 char *canon_name; 1396 bfd_size_type debuglink_size; 1397 unsigned long crc32; 1398 int i; 1399 struct build_id *build_id; 1400 1401 build_id = build_id_bfd_get (objfile->obfd); 1402 if (build_id != NULL) 1403 { 1404 char *build_id_name; 1405 1406 build_id_name = build_id_to_debug_filename (build_id); 1407 free (build_id); 1408 /* Prevent looping on a stripped .debug file. */ 1409 if (build_id_name != NULL && strcmp (build_id_name, objfile->name) == 0) 1410 { 1411 warning (_("\"%s\": separate debug info file has no debug info"), 1412 build_id_name); 1413 xfree (build_id_name); 1414 } 1415 else if (build_id_name != NULL) 1416 return build_id_name; 1417 } 1418 1419 basename = get_debug_link_info (objfile, &crc32); 1420 1421 if (basename == NULL) 1422 return NULL; 1423 1424 dir = xstrdup (objfile->name); 1425 1426 /* Strip off the final filename part, leaving the directory name, 1427 followed by a slash. Objfile names should always be absolute and 1428 tilde-expanded, so there should always be a slash in there 1429 somewhere. */ 1430 for (i = strlen(dir) - 1; i >= 0; i--) 1431 { 1432 if (IS_DIR_SEPARATOR (dir[i])) 1433 break; 1434 } 1435 gdb_assert (i >= 0 && IS_DIR_SEPARATOR (dir[i])); 1436 dir[i+1] = '\0'; 1437 1438 debugfile = alloca (strlen (debug_file_directory) + 1 1439 + strlen (dir) 1440 + strlen (DEBUG_SUBDIRECTORY) 1441 + strlen ("/") 1442 + strlen (basename) 1443 + 1); 1444 1445 /* First try in the same directory as the original file. */ 1446 strcpy (debugfile, dir); 1447 strcat (debugfile, basename); 1448 1449 if (separate_debug_file_exists (debugfile, crc32)) 1450 { 1451 xfree (basename); 1452 xfree (dir); 1453 return xstrdup (debugfile); 1454 } 1455 1456 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */ 1457 strcpy (debugfile, dir); 1458 strcat (debugfile, DEBUG_SUBDIRECTORY); 1459 strcat (debugfile, "/"); 1460 strcat (debugfile, basename); 1461 1462 if (separate_debug_file_exists (debugfile, crc32)) 1463 { 1464 xfree (basename); 1465 xfree (dir); 1466 return xstrdup (debugfile); 1467 } 1468 1469 /* Then try in the global debugfile directory. */ 1470 strcpy (debugfile, debug_file_directory); 1471 strcat (debugfile, "/"); 1472 strcat (debugfile, dir); 1473 strcat (debugfile, basename); 1474 1475 if (separate_debug_file_exists (debugfile, crc32)) 1476 { 1477 xfree (basename); 1478 xfree (dir); 1479 return xstrdup (debugfile); 1480 } 1481 1482 /* If the file is in the sysroot, try using its base path in the 1483 global debugfile directory. */ 1484 canon_name = lrealpath (dir); 1485 if (canon_name 1486 && strncmp (canon_name, gdb_sysroot, strlen (gdb_sysroot)) == 0 1487 && IS_DIR_SEPARATOR (canon_name[strlen (gdb_sysroot)])) 1488 { 1489 strcpy (debugfile, debug_file_directory); 1490 strcat (debugfile, canon_name + strlen (gdb_sysroot)); 1491 strcat (debugfile, "/"); 1492 strcat (debugfile, basename); 1493 1494 if (separate_debug_file_exists (debugfile, crc32)) 1495 { 1496 xfree (canon_name); 1497 xfree (basename); 1498 xfree (dir); 1499 return xstrdup (debugfile); 1500 } 1501 } 1502 1503 if (canon_name) 1504 xfree (canon_name); 1505 1506 xfree (basename); 1507 xfree (dir); 1508 return NULL; 1509} 1510 1511 1512/* This is the symbol-file command. Read the file, analyze its 1513 symbols, and add a struct symtab to a symtab list. The syntax of 1514 the command is rather bizarre: 1515 1516 1. The function buildargv implements various quoting conventions 1517 which are undocumented and have little or nothing in common with 1518 the way things are quoted (or not quoted) elsewhere in GDB. 1519 1520 2. Options are used, which are not generally used in GDB (perhaps 1521 "set mapped on", "set readnow on" would be better) 1522 1523 3. The order of options matters, which is contrary to GNU 1524 conventions (because it is confusing and inconvenient). */ 1525 1526void 1527symbol_file_command (char *args, int from_tty) 1528{ 1529 dont_repeat (); 1530 1531 if (args == NULL) 1532 { 1533 symbol_file_clear (from_tty); 1534 } 1535 else 1536 { 1537 char **argv = buildargv (args); 1538 int flags = OBJF_USERLOADED; 1539 struct cleanup *cleanups; 1540 char *name = NULL; 1541 1542 if (argv == NULL) 1543 nomem (0); 1544 1545 cleanups = make_cleanup_freeargv (argv); 1546 while (*argv != NULL) 1547 { 1548 if (strcmp (*argv, "-readnow") == 0) 1549 flags |= OBJF_READNOW; 1550 else if (**argv == '-') 1551 error (_("unknown option `%s'"), *argv); 1552 else 1553 { 1554 symbol_file_add_main_1 (*argv, from_tty, flags); 1555 name = *argv; 1556 } 1557 1558 argv++; 1559 } 1560 1561 if (name == NULL) 1562 error (_("no symbol file name was specified")); 1563 1564 do_cleanups (cleanups); 1565 } 1566} 1567 1568/* Set the initial language. 1569 1570 FIXME: A better solution would be to record the language in the 1571 psymtab when reading partial symbols, and then use it (if known) to 1572 set the language. This would be a win for formats that encode the 1573 language in an easily discoverable place, such as DWARF. For 1574 stabs, we can jump through hoops looking for specially named 1575 symbols or try to intuit the language from the specific type of 1576 stabs we find, but we can't do that until later when we read in 1577 full symbols. */ 1578 1579static void 1580set_initial_language (void) 1581{ 1582 struct partial_symtab *pst; 1583 enum language lang = language_unknown; 1584 1585 pst = find_main_psymtab (); 1586 if (pst != NULL) 1587 { 1588 if (pst->filename != NULL) 1589 lang = deduce_language_from_filename (pst->filename); 1590 1591 if (lang == language_unknown) 1592 { 1593 /* Make C the default language */ 1594 lang = language_c; 1595 } 1596 1597 set_language (lang); 1598 expected_language = current_language; /* Don't warn the user. */ 1599 } 1600} 1601 1602/* Open the file specified by NAME and hand it off to BFD for 1603 preliminary analysis. Return a newly initialized bfd *, which 1604 includes a newly malloc'd` copy of NAME (tilde-expanded and made 1605 absolute). In case of trouble, error() is called. */ 1606 1607bfd * 1608symfile_bfd_open (char *name) 1609{ 1610 bfd *sym_bfd; 1611 int desc; 1612 char *absolute_name; 1613 1614 name = tilde_expand (name); /* Returns 1st new malloc'd copy. */ 1615 1616 /* Look down path for it, allocate 2nd new malloc'd copy. */ 1617 desc = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST, name, 1618 O_RDONLY | O_BINARY, 0, &absolute_name); 1619#if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__) 1620 if (desc < 0) 1621 { 1622 char *exename = alloca (strlen (name) + 5); 1623 strcat (strcpy (exename, name), ".exe"); 1624 desc = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST, exename, 1625 O_RDONLY | O_BINARY, 0, &absolute_name); 1626 } 1627#endif 1628 if (desc < 0) 1629 { 1630 make_cleanup (xfree, name); 1631 perror_with_name (name); 1632 } 1633 1634 /* Free 1st new malloc'd copy, but keep the 2nd malloc'd copy in 1635 bfd. It'll be freed in free_objfile(). */ 1636 xfree (name); 1637 name = absolute_name; 1638 1639 sym_bfd = bfd_fopen (name, gnutarget, FOPEN_RB, desc); 1640 if (!sym_bfd) 1641 { 1642 close (desc); 1643 make_cleanup (xfree, name); 1644 error (_("\"%s\": can't open to read symbols: %s."), name, 1645 bfd_errmsg (bfd_get_error ())); 1646 } 1647 bfd_set_cacheable (sym_bfd, 1); 1648 1649 if (!bfd_check_format (sym_bfd, bfd_object)) 1650 { 1651 /* FIXME: should be checking for errors from bfd_close (for one 1652 thing, on error it does not free all the storage associated 1653 with the bfd). */ 1654 bfd_close (sym_bfd); /* This also closes desc. */ 1655 make_cleanup (xfree, name); 1656 error (_("\"%s\": can't read symbols: %s."), name, 1657 bfd_errmsg (bfd_get_error ())); 1658 } 1659 1660 return sym_bfd; 1661} 1662 1663/* Return the section index for SECTION_NAME on OBJFILE. Return -1 if 1664 the section was not found. */ 1665 1666int 1667get_section_index (struct objfile *objfile, char *section_name) 1668{ 1669 asection *sect = bfd_get_section_by_name (objfile->obfd, section_name); 1670 1671 if (sect) 1672 return sect->index; 1673 else 1674 return -1; 1675} 1676 1677/* Link SF into the global symtab_fns list. Called on startup by the 1678 _initialize routine in each object file format reader, to register 1679 information about each format the the reader is prepared to 1680 handle. */ 1681 1682void 1683add_symtab_fns (struct sym_fns *sf) 1684{ 1685 sf->next = symtab_fns; 1686 symtab_fns = sf; 1687} 1688 1689/* Initialize OBJFILE to read symbols from its associated BFD. It 1690 either returns or calls error(). The result is an initialized 1691 struct sym_fns in the objfile structure, that contains cached 1692 information about the symbol file. */ 1693 1694static struct sym_fns * 1695find_sym_fns (bfd *abfd) 1696{ 1697 struct sym_fns *sf; 1698 enum bfd_flavour our_flavour = bfd_get_flavour (abfd); 1699 1700 if (our_flavour == bfd_target_srec_flavour 1701 || our_flavour == bfd_target_ihex_flavour 1702 || our_flavour == bfd_target_tekhex_flavour) 1703 return NULL; /* No symbols. */ 1704 1705 for (sf = symtab_fns; sf != NULL; sf = sf->next) 1706 if (our_flavour == sf->sym_flavour) 1707 return sf; 1708 1709 error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."), 1710 bfd_get_target (abfd)); 1711} 1712 1713 1714/* This function runs the load command of our current target. */ 1715 1716static void 1717load_command (char *arg, int from_tty) 1718{ 1719 if (arg == NULL) 1720 { 1721 char *parg; 1722 int count = 0; 1723 1724 parg = arg = get_exec_file (1); 1725 1726 /* Count how many \ " ' tab space there are in the name. */ 1727 while ((parg = strpbrk (parg, "\\\"'\t "))) 1728 { 1729 parg++; 1730 count++; 1731 } 1732 1733 if (count) 1734 { 1735 /* We need to quote this string so buildargv can pull it apart. */ 1736 char *temp = xmalloc (strlen (arg) + count + 1 ); 1737 char *ptemp = temp; 1738 char *prev; 1739 1740 make_cleanup (xfree, temp); 1741 1742 prev = parg = arg; 1743 while ((parg = strpbrk (parg, "\\\"'\t "))) 1744 { 1745 strncpy (ptemp, prev, parg - prev); 1746 ptemp += parg - prev; 1747 prev = parg++; 1748 *ptemp++ = '\\'; 1749 } 1750 strcpy (ptemp, prev); 1751 1752 arg = temp; 1753 } 1754 } 1755 1756 /* The user might be reloading because the binary has changed. Take 1757 this opportunity to check. */ 1758 reopen_exec_file (); 1759 reread_symbols (); 1760 1761 target_load (arg, from_tty); 1762 1763 /* After re-loading the executable, we don't really know which 1764 overlays are mapped any more. */ 1765 overlay_cache_invalid = 1; 1766} 1767 1768/* This version of "load" should be usable for any target. Currently 1769 it is just used for remote targets, not inftarg.c or core files, 1770 on the theory that only in that case is it useful. 1771 1772 Avoiding xmodem and the like seems like a win (a) because we don't have 1773 to worry about finding it, and (b) On VMS, fork() is very slow and so 1774 we don't want to run a subprocess. On the other hand, I'm not sure how 1775 performance compares. */ 1776 1777static int validate_download = 0; 1778 1779/* Callback service function for generic_load (bfd_map_over_sections). */ 1780 1781static void 1782add_section_size_callback (bfd *abfd, asection *asec, void *data) 1783{ 1784 bfd_size_type *sum = data; 1785 1786 *sum += bfd_get_section_size (asec); 1787} 1788 1789/* Opaque data for load_section_callback. */ 1790struct load_section_data { 1791 unsigned long load_offset; 1792 struct load_progress_data *progress_data; 1793 VEC(memory_write_request_s) *requests; 1794}; 1795 1796/* Opaque data for load_progress. */ 1797struct load_progress_data { 1798 /* Cumulative data. */ 1799 unsigned long write_count; 1800 unsigned long data_count; 1801 bfd_size_type total_size; 1802}; 1803 1804/* Opaque data for load_progress for a single section. */ 1805struct load_progress_section_data { 1806 struct load_progress_data *cumulative; 1807 1808 /* Per-section data. */ 1809 const char *section_name; 1810 ULONGEST section_sent; 1811 ULONGEST section_size; 1812 CORE_ADDR lma; 1813 gdb_byte *buffer; 1814}; 1815 1816/* Target write callback routine for progress reporting. */ 1817 1818static void 1819load_progress (ULONGEST bytes, void *untyped_arg) 1820{ 1821 struct load_progress_section_data *args = untyped_arg; 1822 struct load_progress_data *totals; 1823 1824 if (args == NULL) 1825 /* Writing padding data. No easy way to get at the cumulative 1826 stats, so just ignore this. */ 1827 return; 1828 1829 totals = args->cumulative; 1830 1831 if (bytes == 0 && args->section_sent == 0) 1832 { 1833 /* The write is just starting. Let the user know we've started 1834 this section. */ 1835 ui_out_message (uiout, 0, "Loading section %s, size 0x%s lma 0x%s\n", 1836 args->section_name, paddr_nz (args->section_size), 1837 paddr_nz (args->lma)); 1838 return; 1839 } 1840 1841 if (validate_download) 1842 { 1843 /* Broken memories and broken monitors manifest themselves here 1844 when bring new computers to life. This doubles already slow 1845 downloads. */ 1846 /* NOTE: cagney/1999-10-18: A more efficient implementation 1847 might add a verify_memory() method to the target vector and 1848 then use that. remote.c could implement that method using 1849 the ``qCRC'' packet. */ 1850 gdb_byte *check = xmalloc (bytes); 1851 struct cleanup *verify_cleanups = make_cleanup (xfree, check); 1852 1853 if (target_read_memory (args->lma, check, bytes) != 0) 1854 error (_("Download verify read failed at 0x%s"), 1855 paddr (args->lma)); 1856 if (memcmp (args->buffer, check, bytes) != 0) 1857 error (_("Download verify compare failed at 0x%s"), 1858 paddr (args->lma)); 1859 do_cleanups (verify_cleanups); 1860 } 1861 totals->data_count += bytes; 1862 args->lma += bytes; 1863 args->buffer += bytes; 1864 totals->write_count += 1; 1865 args->section_sent += bytes; 1866 if (quit_flag 1867 || (deprecated_ui_load_progress_hook != NULL 1868 && deprecated_ui_load_progress_hook (args->section_name, 1869 args->section_sent))) 1870 error (_("Canceled the download")); 1871 1872 if (deprecated_show_load_progress != NULL) 1873 deprecated_show_load_progress (args->section_name, 1874 args->section_sent, 1875 args->section_size, 1876 totals->data_count, 1877 totals->total_size); 1878} 1879 1880/* Callback service function for generic_load (bfd_map_over_sections). */ 1881 1882static void 1883load_section_callback (bfd *abfd, asection *asec, void *data) 1884{ 1885 struct memory_write_request *new_request; 1886 struct load_section_data *args = data; 1887 struct load_progress_section_data *section_data; 1888 bfd_size_type size = bfd_get_section_size (asec); 1889 gdb_byte *buffer; 1890 const char *sect_name = bfd_get_section_name (abfd, asec); 1891 1892 if ((bfd_get_section_flags (abfd, asec) & SEC_LOAD) == 0) 1893 return; 1894 1895 if (size == 0) 1896 return; 1897 1898 new_request = VEC_safe_push (memory_write_request_s, 1899 args->requests, NULL); 1900 memset (new_request, 0, sizeof (struct memory_write_request)); 1901 section_data = xcalloc (1, sizeof (struct load_progress_section_data)); 1902 new_request->begin = bfd_section_lma (abfd, asec) + args->load_offset; 1903 new_request->end = new_request->begin + size; /* FIXME Should size be in instead? */ 1904 new_request->data = xmalloc (size); 1905 new_request->baton = section_data; 1906 1907 buffer = new_request->data; 1908 1909 section_data->cumulative = args->progress_data; 1910 section_data->section_name = sect_name; 1911 section_data->section_size = size; 1912 section_data->lma = new_request->begin; 1913 section_data->buffer = buffer; 1914 1915 bfd_get_section_contents (abfd, asec, buffer, 0, size); 1916} 1917 1918/* Clean up an entire memory request vector, including load 1919 data and progress records. */ 1920 1921static void 1922clear_memory_write_data (void *arg) 1923{ 1924 VEC(memory_write_request_s) **vec_p = arg; 1925 VEC(memory_write_request_s) *vec = *vec_p; 1926 int i; 1927 struct memory_write_request *mr; 1928 1929 for (i = 0; VEC_iterate (memory_write_request_s, vec, i, mr); ++i) 1930 { 1931 xfree (mr->data); 1932 xfree (mr->baton); 1933 } 1934 VEC_free (memory_write_request_s, vec); 1935} 1936 1937void 1938generic_load (char *args, int from_tty) 1939{ 1940 bfd *loadfile_bfd; 1941 struct timeval start_time, end_time; 1942 char *filename; 1943 struct cleanup *old_cleanups = make_cleanup (null_cleanup, 0); 1944 struct load_section_data cbdata; 1945 struct load_progress_data total_progress; 1946 1947 CORE_ADDR entry; 1948 char **argv; 1949 1950 memset (&cbdata, 0, sizeof (cbdata)); 1951 memset (&total_progress, 0, sizeof (total_progress)); 1952 cbdata.progress_data = &total_progress; 1953 1954 make_cleanup (clear_memory_write_data, &cbdata.requests); 1955 1956 argv = buildargv (args); 1957 1958 if (argv == NULL) 1959 nomem(0); 1960 1961 make_cleanup_freeargv (argv); 1962 1963 filename = tilde_expand (argv[0]); 1964 make_cleanup (xfree, filename); 1965 1966 if (argv[1] != NULL) 1967 { 1968 char *endptr; 1969 1970 cbdata.load_offset = strtoul (argv[1], &endptr, 0); 1971 1972 /* If the last word was not a valid number then 1973 treat it as a file name with spaces in. */ 1974 if (argv[1] == endptr) 1975 error (_("Invalid download offset:%s."), argv[1]); 1976 1977 if (argv[2] != NULL) 1978 error (_("Too many parameters.")); 1979 } 1980 1981 /* Open the file for loading. */ 1982 loadfile_bfd = bfd_openr (filename, gnutarget); 1983 if (loadfile_bfd == NULL) 1984 { 1985 perror_with_name (filename); 1986 return; 1987 } 1988 1989 /* FIXME: should be checking for errors from bfd_close (for one thing, 1990 on error it does not free all the storage associated with the 1991 bfd). */ 1992 make_cleanup_bfd_close (loadfile_bfd); 1993 1994 if (!bfd_check_format (loadfile_bfd, bfd_object)) 1995 { 1996 error (_("\"%s\" is not an object file: %s"), filename, 1997 bfd_errmsg (bfd_get_error ())); 1998 } 1999 2000 bfd_map_over_sections (loadfile_bfd, add_section_size_callback, 2001 (void *) &total_progress.total_size); 2002 2003 bfd_map_over_sections (loadfile_bfd, load_section_callback, &cbdata); 2004 2005 gettimeofday (&start_time, NULL); 2006 2007 if (target_write_memory_blocks (cbdata.requests, flash_discard, 2008 load_progress) != 0) 2009 error (_("Load failed")); 2010 2011 gettimeofday (&end_time, NULL); 2012 2013 entry = bfd_get_start_address (loadfile_bfd); 2014 ui_out_text (uiout, "Start address "); 2015 ui_out_field_fmt (uiout, "address", "0x%s", paddr_nz (entry)); 2016 ui_out_text (uiout, ", load size "); 2017 ui_out_field_fmt (uiout, "load-size", "%lu", total_progress.data_count); 2018 ui_out_text (uiout, "\n"); 2019 /* We were doing this in remote-mips.c, I suspect it is right 2020 for other targets too. */ 2021 write_pc (entry); 2022 2023 /* FIXME: are we supposed to call symbol_file_add or not? According 2024 to a comment from remote-mips.c (where a call to symbol_file_add 2025 was commented out), making the call confuses GDB if more than one 2026 file is loaded in. Some targets do (e.g., remote-vx.c) but 2027 others don't (or didn't - perhaps they have all been deleted). */ 2028 2029 print_transfer_performance (gdb_stdout, total_progress.data_count, 2030 total_progress.write_count, 2031 &start_time, &end_time); 2032 2033 do_cleanups (old_cleanups); 2034} 2035 2036/* Report how fast the transfer went. */ 2037 2038/* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being 2039 replaced by print_transfer_performance (with a very different 2040 function signature). */ 2041 2042void 2043report_transfer_performance (unsigned long data_count, time_t start_time, 2044 time_t end_time) 2045{ 2046 struct timeval start, end; 2047 2048 start.tv_sec = start_time; 2049 start.tv_usec = 0; 2050 end.tv_sec = end_time; 2051 end.tv_usec = 0; 2052 2053 print_transfer_performance (gdb_stdout, data_count, 0, &start, &end); 2054} 2055 2056void 2057print_transfer_performance (struct ui_file *stream, 2058 unsigned long data_count, 2059 unsigned long write_count, 2060 const struct timeval *start_time, 2061 const struct timeval *end_time) 2062{ 2063 ULONGEST time_count; 2064 2065 /* Compute the elapsed time in milliseconds, as a tradeoff between 2066 accuracy and overflow. */ 2067 time_count = (end_time->tv_sec - start_time->tv_sec) * 1000; 2068 time_count += (end_time->tv_usec - start_time->tv_usec) / 1000; 2069 2070 ui_out_text (uiout, "Transfer rate: "); 2071 if (time_count > 0) 2072 { 2073 unsigned long rate = ((ULONGEST) data_count * 1000) / time_count; 2074 2075 if (ui_out_is_mi_like_p (uiout)) 2076 { 2077 ui_out_field_fmt (uiout, "transfer-rate", "%lu", rate * 8); 2078 ui_out_text (uiout, " bits/sec"); 2079 } 2080 else if (rate < 1024) 2081 { 2082 ui_out_field_fmt (uiout, "transfer-rate", "%lu", rate); 2083 ui_out_text (uiout, " bytes/sec"); 2084 } 2085 else 2086 { 2087 ui_out_field_fmt (uiout, "transfer-rate", "%lu", rate / 1024); 2088 ui_out_text (uiout, " KB/sec"); 2089 } 2090 } 2091 else 2092 { 2093 ui_out_field_fmt (uiout, "transferred-bits", "%lu", (data_count * 8)); 2094 ui_out_text (uiout, " bits in <1 sec"); 2095 } 2096 if (write_count > 0) 2097 { 2098 ui_out_text (uiout, ", "); 2099 ui_out_field_fmt (uiout, "write-rate", "%lu", data_count / write_count); 2100 ui_out_text (uiout, " bytes/write"); 2101 } 2102 ui_out_text (uiout, ".\n"); 2103} 2104 2105/* This function allows the addition of incrementally linked object files. 2106 It does not modify any state in the target, only in the debugger. */ 2107/* Note: ezannoni 2000-04-13 This function/command used to have a 2108 special case syntax for the rombug target (Rombug is the boot 2109 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the 2110 rombug case, the user doesn't need to supply a text address, 2111 instead a call to target_link() (in target.c) would supply the 2112 value to use. We are now discontinuing this type of ad hoc syntax. */ 2113 2114static void 2115add_symbol_file_command (char *args, int from_tty) 2116{ 2117 char *filename = NULL; 2118 int flags = OBJF_USERLOADED; 2119 char *arg; 2120 int expecting_option = 0; 2121 int section_index = 0; 2122 int argcnt = 0; 2123 int sec_num = 0; 2124 int i; 2125 int expecting_sec_name = 0; 2126 int expecting_sec_addr = 0; 2127 char **argv; 2128 2129 struct sect_opt 2130 { 2131 char *name; 2132 char *value; 2133 }; 2134 2135 struct section_addr_info *section_addrs; 2136 struct sect_opt *sect_opts = NULL; 2137 size_t num_sect_opts = 0; 2138 struct cleanup *my_cleanups = make_cleanup (null_cleanup, NULL); 2139 2140 num_sect_opts = 16; 2141 sect_opts = (struct sect_opt *) xmalloc (num_sect_opts 2142 * sizeof (struct sect_opt)); 2143 2144 dont_repeat (); 2145 2146 if (args == NULL) 2147 error (_("add-symbol-file takes a file name and an address")); 2148 2149 argv = buildargv (args); 2150 make_cleanup_freeargv (argv); 2151 2152 if (argv == NULL) 2153 nomem (0); 2154 2155 for (arg = argv[0], argcnt = 0; arg != NULL; arg = argv[++argcnt]) 2156 { 2157 /* Process the argument. */ 2158 if (argcnt == 0) 2159 { 2160 /* The first argument is the file name. */ 2161 filename = tilde_expand (arg); 2162 make_cleanup (xfree, filename); 2163 } 2164 else 2165 if (argcnt == 1) 2166 { 2167 /* The second argument is always the text address at which 2168 to load the program. */ 2169 sect_opts[section_index].name = ".text"; 2170 sect_opts[section_index].value = arg; 2171 if (++section_index >= num_sect_opts) 2172 { 2173 num_sect_opts *= 2; 2174 sect_opts = ((struct sect_opt *) 2175 xrealloc (sect_opts, 2176 num_sect_opts 2177 * sizeof (struct sect_opt))); 2178 } 2179 } 2180 else 2181 { 2182 /* It's an option (starting with '-') or it's an argument 2183 to an option */ 2184 2185 if (*arg == '-') 2186 { 2187 if (strcmp (arg, "-readnow") == 0) 2188 flags |= OBJF_READNOW; 2189 else if (strcmp (arg, "-s") == 0) 2190 { 2191 expecting_sec_name = 1; 2192 expecting_sec_addr = 1; 2193 } 2194 } 2195 else 2196 { 2197 if (expecting_sec_name) 2198 { 2199 sect_opts[section_index].name = arg; 2200 expecting_sec_name = 0; 2201 } 2202 else 2203 if (expecting_sec_addr) 2204 { 2205 sect_opts[section_index].value = arg; 2206 expecting_sec_addr = 0; 2207 if (++section_index >= num_sect_opts) 2208 { 2209 num_sect_opts *= 2; 2210 sect_opts = ((struct sect_opt *) 2211 xrealloc (sect_opts, 2212 num_sect_opts 2213 * sizeof (struct sect_opt))); 2214 } 2215 } 2216 else 2217 error (_("USAGE: add-symbol-file <filename> <textaddress> [-mapped] [-readnow] [-s <secname> <addr>]*")); 2218 } 2219 } 2220 } 2221 2222 /* This command takes at least two arguments. The first one is a 2223 filename, and the second is the address where this file has been 2224 loaded. Abort now if this address hasn't been provided by the 2225 user. */ 2226 if (section_index < 1) 2227 error (_("The address where %s has been loaded is missing"), filename); 2228 2229 /* Print the prompt for the query below. And save the arguments into 2230 a sect_addr_info structure to be passed around to other 2231 functions. We have to split this up into separate print 2232 statements because hex_string returns a local static 2233 string. */ 2234 2235 printf_unfiltered (_("add symbol table from file \"%s\" at\n"), filename); 2236 section_addrs = alloc_section_addr_info (section_index); 2237 make_cleanup (xfree, section_addrs); 2238 for (i = 0; i < section_index; i++) 2239 { 2240 CORE_ADDR addr; 2241 char *val = sect_opts[i].value; 2242 char *sec = sect_opts[i].name; 2243 2244 addr = parse_and_eval_address (val); 2245 2246 /* Here we store the section offsets in the order they were 2247 entered on the command line. */ 2248 section_addrs->other[sec_num].name = sec; 2249 section_addrs->other[sec_num].addr = addr; 2250 printf_unfiltered ("\t%s_addr = %s\n", 2251 sec, hex_string ((unsigned long)addr)); 2252 sec_num++; 2253 2254 /* The object's sections are initialized when a 2255 call is made to build_objfile_section_table (objfile). 2256 This happens in reread_symbols. 2257 At this point, we don't know what file type this is, 2258 so we can't determine what section names are valid. */ 2259 } 2260 2261 if (from_tty && (!query ("%s", ""))) 2262 error (_("Not confirmed.")); 2263 2264 symbol_file_add (filename, from_tty, section_addrs, 0, flags); 2265 2266 /* Getting new symbols may change our opinion about what is 2267 frameless. */ 2268 reinit_frame_cache (); 2269 do_cleanups (my_cleanups); 2270} 2271 2272static void 2273add_shared_symbol_files_command (char *args, int from_tty) 2274{ 2275#ifdef ADD_SHARED_SYMBOL_FILES 2276 ADD_SHARED_SYMBOL_FILES (args, from_tty); 2277#else 2278 error (_("This command is not available in this configuration of GDB.")); 2279#endif 2280} 2281 2282/* Re-read symbols if a symbol-file has changed. */ 2283void 2284reread_symbols (void) 2285{ 2286 struct objfile *objfile; 2287 long new_modtime; 2288 int reread_one = 0; 2289 struct stat new_statbuf; 2290 int res; 2291 2292 /* With the addition of shared libraries, this should be modified, 2293 the load time should be saved in the partial symbol tables, since 2294 different tables may come from different source files. FIXME. 2295 This routine should then walk down each partial symbol table 2296 and see if the symbol table that it originates from has been changed */ 2297 2298 for (objfile = object_files; objfile; objfile = objfile->next) 2299 { 2300 if (objfile->obfd) 2301 { 2302#ifdef DEPRECATED_IBM6000_TARGET 2303 /* If this object is from a shared library, then you should 2304 stat on the library name, not member name. */ 2305 2306 if (objfile->obfd->my_archive) 2307 res = stat (objfile->obfd->my_archive->filename, &new_statbuf); 2308 else 2309#endif 2310 res = stat (objfile->name, &new_statbuf); 2311 if (res != 0) 2312 { 2313 /* FIXME, should use print_sys_errmsg but it's not filtered. */ 2314 printf_unfiltered (_("`%s' has disappeared; keeping its symbols.\n"), 2315 objfile->name); 2316 continue; 2317 } 2318 new_modtime = new_statbuf.st_mtime; 2319 if (new_modtime != objfile->mtime) 2320 { 2321 struct cleanup *old_cleanups; 2322 struct section_offsets *offsets; 2323 int num_offsets; 2324 char *obfd_filename; 2325 2326 printf_unfiltered (_("`%s' has changed; re-reading symbols.\n"), 2327 objfile->name); 2328 2329 /* There are various functions like symbol_file_add, 2330 symfile_bfd_open, syms_from_objfile, etc., which might 2331 appear to do what we want. But they have various other 2332 effects which we *don't* want. So we just do stuff 2333 ourselves. We don't worry about mapped files (for one thing, 2334 any mapped file will be out of date). */ 2335 2336 /* If we get an error, blow away this objfile (not sure if 2337 that is the correct response for things like shared 2338 libraries). */ 2339 old_cleanups = make_cleanup_free_objfile (objfile); 2340 /* We need to do this whenever any symbols go away. */ 2341 make_cleanup (clear_symtab_users_cleanup, 0 /*ignore*/); 2342 2343 /* Clean up any state BFD has sitting around. We don't need 2344 to close the descriptor but BFD lacks a way of closing the 2345 BFD without closing the descriptor. */ 2346 obfd_filename = bfd_get_filename (objfile->obfd); 2347 if (!bfd_close (objfile->obfd)) 2348 error (_("Can't close BFD for %s: %s"), objfile->name, 2349 bfd_errmsg (bfd_get_error ())); 2350 objfile->obfd = bfd_openr (obfd_filename, gnutarget); 2351 if (objfile->obfd == NULL) 2352 error (_("Can't open %s to read symbols."), objfile->name); 2353 /* bfd_openr sets cacheable to true, which is what we want. */ 2354 if (!bfd_check_format (objfile->obfd, bfd_object)) 2355 error (_("Can't read symbols from %s: %s."), objfile->name, 2356 bfd_errmsg (bfd_get_error ())); 2357 2358 /* Save the offsets, we will nuke them with the rest of the 2359 objfile_obstack. */ 2360 num_offsets = objfile->num_sections; 2361 offsets = ((struct section_offsets *) 2362 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets))); 2363 memcpy (offsets, objfile->section_offsets, 2364 SIZEOF_N_SECTION_OFFSETS (num_offsets)); 2365 2366 /* Remove any references to this objfile in the global 2367 value lists. */ 2368 preserve_values (objfile); 2369 2370 /* Nuke all the state that we will re-read. Much of the following 2371 code which sets things to NULL really is necessary to tell 2372 other parts of GDB that there is nothing currently there. */ 2373 2374 /* FIXME: Do we have to free a whole linked list, or is this 2375 enough? */ 2376 if (objfile->global_psymbols.list) 2377 xfree (objfile->global_psymbols.list); 2378 memset (&objfile->global_psymbols, 0, 2379 sizeof (objfile->global_psymbols)); 2380 if (objfile->static_psymbols.list) 2381 xfree (objfile->static_psymbols.list); 2382 memset (&objfile->static_psymbols, 0, 2383 sizeof (objfile->static_psymbols)); 2384 2385 /* Free the obstacks for non-reusable objfiles */ 2386 bcache_xfree (objfile->psymbol_cache); 2387 objfile->psymbol_cache = bcache_xmalloc (); 2388 bcache_xfree (objfile->macro_cache); 2389 objfile->macro_cache = bcache_xmalloc (); 2390 if (objfile->demangled_names_hash != NULL) 2391 { 2392 htab_delete (objfile->demangled_names_hash); 2393 objfile->demangled_names_hash = NULL; 2394 } 2395 obstack_free (&objfile->objfile_obstack, 0); 2396 objfile->sections = NULL; 2397 objfile->symtabs = NULL; 2398 objfile->psymtabs = NULL; 2399 objfile->free_psymtabs = NULL; 2400 objfile->cp_namespace_symtab = NULL; 2401 objfile->msymbols = NULL; 2402 objfile->deprecated_sym_private = NULL; 2403 objfile->minimal_symbol_count = 0; 2404 memset (&objfile->msymbol_hash, 0, 2405 sizeof (objfile->msymbol_hash)); 2406 memset (&objfile->msymbol_demangled_hash, 0, 2407 sizeof (objfile->msymbol_demangled_hash)); 2408 objfile->fundamental_types = NULL; 2409 clear_objfile_data (objfile); 2410 if (objfile->sf != NULL) 2411 { 2412 (*objfile->sf->sym_finish) (objfile); 2413 } 2414 2415 /* We never make this a mapped file. */ 2416 objfile->md = NULL; 2417 objfile->psymbol_cache = bcache_xmalloc (); 2418 objfile->macro_cache = bcache_xmalloc (); 2419 /* obstack_init also initializes the obstack so it is 2420 empty. We could use obstack_specify_allocation but 2421 gdb_obstack.h specifies the alloc/dealloc 2422 functions. */ 2423 obstack_init (&objfile->objfile_obstack); 2424 if (build_objfile_section_table (objfile)) 2425 { 2426 error (_("Can't find the file sections in `%s': %s"), 2427 objfile->name, bfd_errmsg (bfd_get_error ())); 2428 } 2429 terminate_minimal_symbol_table (objfile); 2430 2431 /* We use the same section offsets as from last time. I'm not 2432 sure whether that is always correct for shared libraries. */ 2433 objfile->section_offsets = (struct section_offsets *) 2434 obstack_alloc (&objfile->objfile_obstack, 2435 SIZEOF_N_SECTION_OFFSETS (num_offsets)); 2436 memcpy (objfile->section_offsets, offsets, 2437 SIZEOF_N_SECTION_OFFSETS (num_offsets)); 2438 objfile->num_sections = num_offsets; 2439 2440 /* What the hell is sym_new_init for, anyway? The concept of 2441 distinguishing between the main file and additional files 2442 in this way seems rather dubious. */ 2443 if (objfile == symfile_objfile) 2444 { 2445 (*objfile->sf->sym_new_init) (objfile); 2446 } 2447 2448 (*objfile->sf->sym_init) (objfile); 2449 clear_complaints (&symfile_complaints, 1, 1); 2450 /* The "mainline" parameter is a hideous hack; I think leaving it 2451 zero is OK since dbxread.c also does what it needs to do if 2452 objfile->global_psymbols.size is 0. */ 2453 (*objfile->sf->sym_read) (objfile, 0); 2454 if (!have_partial_symbols () && !have_full_symbols ()) 2455 { 2456 wrap_here (""); 2457 printf_unfiltered (_("(no debugging symbols found)\n")); 2458 wrap_here (""); 2459 } 2460 objfile->flags |= OBJF_SYMS; 2461 2462 /* We're done reading the symbol file; finish off complaints. */ 2463 clear_complaints (&symfile_complaints, 0, 1); 2464 2465 /* Getting new symbols may change our opinion about what is 2466 frameless. */ 2467 2468 reinit_frame_cache (); 2469 2470 /* Discard cleanups as symbol reading was successful. */ 2471 discard_cleanups (old_cleanups); 2472 2473 /* If the mtime has changed between the time we set new_modtime 2474 and now, we *want* this to be out of date, so don't call stat 2475 again now. */ 2476 objfile->mtime = new_modtime; 2477 reread_one = 1; 2478 reread_separate_symbols (objfile); 2479 } 2480 } 2481 } 2482 2483 if (reread_one) 2484 { 2485 clear_symtab_users (); 2486 /* At least one objfile has changed, so we can consider that 2487 the executable we're debugging has changed too. */ 2488 observer_notify_executable_changed (NULL); 2489 } 2490 2491} 2492 2493 2494/* Handle separate debug info for OBJFILE, which has just been 2495 re-read: 2496 - If we had separate debug info before, but now we don't, get rid 2497 of the separated objfile. 2498 - If we didn't have separated debug info before, but now we do, 2499 read in the new separated debug info file. 2500 - If the debug link points to a different file, toss the old one 2501 and read the new one. 2502 This function does *not* handle the case where objfile is still 2503 using the same separate debug info file, but that file's timestamp 2504 has changed. That case should be handled by the loop in 2505 reread_symbols already. */ 2506static void 2507reread_separate_symbols (struct objfile *objfile) 2508{ 2509 char *debug_file; 2510 unsigned long crc32; 2511 2512 /* Does the updated objfile's debug info live in a 2513 separate file? */ 2514 debug_file = find_separate_debug_file (objfile); 2515 2516 if (objfile->separate_debug_objfile) 2517 { 2518 /* There are two cases where we need to get rid of 2519 the old separated debug info objfile: 2520 - if the new primary objfile doesn't have 2521 separated debug info, or 2522 - if the new primary objfile has separate debug 2523 info, but it's under a different filename. 2524 2525 If the old and new objfiles both have separate 2526 debug info, under the same filename, then we're 2527 okay --- if the separated file's contents have 2528 changed, we will have caught that when we 2529 visited it in this function's outermost 2530 loop. */ 2531 if (! debug_file 2532 || strcmp (debug_file, objfile->separate_debug_objfile->name) != 0) 2533 free_objfile (objfile->separate_debug_objfile); 2534 } 2535 2536 /* If the new objfile has separate debug info, and we 2537 haven't loaded it already, do so now. */ 2538 if (debug_file 2539 && ! objfile->separate_debug_objfile) 2540 { 2541 /* Use the same section offset table as objfile itself. 2542 Preserve the flags from objfile that make sense. */ 2543 objfile->separate_debug_objfile 2544 = (symbol_file_add_with_addrs_or_offsets 2545 (symfile_bfd_open (debug_file), 2546 info_verbose, /* from_tty: Don't override the default. */ 2547 0, /* No addr table. */ 2548 objfile->section_offsets, objfile->num_sections, 2549 0, /* Not mainline. See comments about this above. */ 2550 objfile->flags & (OBJF_REORDERED | OBJF_SHARED | OBJF_READNOW 2551 | OBJF_USERLOADED))); 2552 objfile->separate_debug_objfile->separate_debug_objfile_backlink 2553 = objfile; 2554 } 2555 if (debug_file) 2556 xfree (debug_file); 2557} 2558 2559 2560 2561 2562 2563typedef struct 2564{ 2565 char *ext; 2566 enum language lang; 2567} 2568filename_language; 2569 2570static filename_language *filename_language_table; 2571static int fl_table_size, fl_table_next; 2572 2573static void 2574add_filename_language (char *ext, enum language lang) 2575{ 2576 if (fl_table_next >= fl_table_size) 2577 { 2578 fl_table_size += 10; 2579 filename_language_table = 2580 xrealloc (filename_language_table, 2581 fl_table_size * sizeof (*filename_language_table)); 2582 } 2583 2584 filename_language_table[fl_table_next].ext = xstrdup (ext); 2585 filename_language_table[fl_table_next].lang = lang; 2586 fl_table_next++; 2587} 2588 2589static char *ext_args; 2590static void 2591show_ext_args (struct ui_file *file, int from_tty, 2592 struct cmd_list_element *c, const char *value) 2593{ 2594 fprintf_filtered (file, _("\ 2595Mapping between filename extension and source language is \"%s\".\n"), 2596 value); 2597} 2598 2599static void 2600set_ext_lang_command (char *args, int from_tty, struct cmd_list_element *e) 2601{ 2602 int i; 2603 char *cp = ext_args; 2604 enum language lang; 2605 2606 /* First arg is filename extension, starting with '.' */ 2607 if (*cp != '.') 2608 error (_("'%s': Filename extension must begin with '.'"), ext_args); 2609 2610 /* Find end of first arg. */ 2611 while (*cp && !isspace (*cp)) 2612 cp++; 2613 2614 if (*cp == '\0') 2615 error (_("'%s': two arguments required -- filename extension and language"), 2616 ext_args); 2617 2618 /* Null-terminate first arg */ 2619 *cp++ = '\0'; 2620 2621 /* Find beginning of second arg, which should be a source language. */ 2622 while (*cp && isspace (*cp)) 2623 cp++; 2624 2625 if (*cp == '\0') 2626 error (_("'%s': two arguments required -- filename extension and language"), 2627 ext_args); 2628 2629 /* Lookup the language from among those we know. */ 2630 lang = language_enum (cp); 2631 2632 /* Now lookup the filename extension: do we already know it? */ 2633 for (i = 0; i < fl_table_next; i++) 2634 if (0 == strcmp (ext_args, filename_language_table[i].ext)) 2635 break; 2636 2637 if (i >= fl_table_next) 2638 { 2639 /* new file extension */ 2640 add_filename_language (ext_args, lang); 2641 } 2642 else 2643 { 2644 /* redefining a previously known filename extension */ 2645 2646 /* if (from_tty) */ 2647 /* query ("Really make files of type %s '%s'?", */ 2648 /* ext_args, language_str (lang)); */ 2649 2650 xfree (filename_language_table[i].ext); 2651 filename_language_table[i].ext = xstrdup (ext_args); 2652 filename_language_table[i].lang = lang; 2653 } 2654} 2655 2656static void 2657info_ext_lang_command (char *args, int from_tty) 2658{ 2659 int i; 2660 2661 printf_filtered (_("Filename extensions and the languages they represent:")); 2662 printf_filtered ("\n\n"); 2663 for (i = 0; i < fl_table_next; i++) 2664 printf_filtered ("\t%s\t- %s\n", 2665 filename_language_table[i].ext, 2666 language_str (filename_language_table[i].lang)); 2667} 2668 2669static void 2670init_filename_language_table (void) 2671{ 2672 if (fl_table_size == 0) /* protect against repetition */ 2673 { 2674 fl_table_size = 20; 2675 fl_table_next = 0; 2676 filename_language_table = 2677 xmalloc (fl_table_size * sizeof (*filename_language_table)); 2678 add_filename_language (".c", language_c); 2679 add_filename_language (".C", language_cplus); 2680 add_filename_language (".cc", language_cplus); 2681 add_filename_language (".cp", language_cplus); 2682 add_filename_language (".cpp", language_cplus); 2683 add_filename_language (".cxx", language_cplus); 2684 add_filename_language (".c++", language_cplus); 2685 add_filename_language (".java", language_java); 2686 add_filename_language (".class", language_java); 2687 add_filename_language (".m", language_objc); 2688 add_filename_language (".f", language_fortran); 2689 add_filename_language (".F", language_fortran); 2690 add_filename_language (".s", language_asm); 2691 add_filename_language (".S", language_asm); 2692 add_filename_language (".pas", language_pascal); 2693 add_filename_language (".p", language_pascal); 2694 add_filename_language (".pp", language_pascal); 2695 add_filename_language (".adb", language_ada); 2696 add_filename_language (".ads", language_ada); 2697 add_filename_language (".a", language_ada); 2698 add_filename_language (".ada", language_ada); 2699 } 2700} 2701 2702enum language 2703deduce_language_from_filename (char *filename) 2704{ 2705 int i; 2706 char *cp; 2707 2708 if (filename != NULL) 2709 if ((cp = strrchr (filename, '.')) != NULL) 2710 for (i = 0; i < fl_table_next; i++) 2711 if (strcmp (cp, filename_language_table[i].ext) == 0) 2712 return filename_language_table[i].lang; 2713 2714 return language_unknown; 2715} 2716 2717/* allocate_symtab: 2718 2719 Allocate and partly initialize a new symbol table. Return a pointer 2720 to it. error() if no space. 2721 2722 Caller must set these fields: 2723 LINETABLE(symtab) 2724 symtab->blockvector 2725 symtab->dirname 2726 symtab->free_code 2727 symtab->free_ptr 2728 possibly free_named_symtabs (symtab->filename); 2729 */ 2730 2731struct symtab * 2732allocate_symtab (char *filename, struct objfile *objfile) 2733{ 2734 struct symtab *symtab; 2735 2736 symtab = (struct symtab *) 2737 obstack_alloc (&objfile->objfile_obstack, sizeof (struct symtab)); 2738 memset (symtab, 0, sizeof (*symtab)); 2739 symtab->filename = obsavestring (filename, strlen (filename), 2740 &objfile->objfile_obstack); 2741 symtab->fullname = NULL; 2742 symtab->language = deduce_language_from_filename (filename); 2743 symtab->debugformat = obsavestring ("unknown", 7, 2744 &objfile->objfile_obstack); 2745 2746 /* Hook it to the objfile it comes from */ 2747 2748 symtab->objfile = objfile; 2749 symtab->next = objfile->symtabs; 2750 objfile->symtabs = symtab; 2751 2752 return (symtab); 2753} 2754 2755struct partial_symtab * 2756allocate_psymtab (char *filename, struct objfile *objfile) 2757{ 2758 struct partial_symtab *psymtab; 2759 2760 if (objfile->free_psymtabs) 2761 { 2762 psymtab = objfile->free_psymtabs; 2763 objfile->free_psymtabs = psymtab->next; 2764 } 2765 else 2766 psymtab = (struct partial_symtab *) 2767 obstack_alloc (&objfile->objfile_obstack, 2768 sizeof (struct partial_symtab)); 2769 2770 memset (psymtab, 0, sizeof (struct partial_symtab)); 2771 psymtab->filename = obsavestring (filename, strlen (filename), 2772 &objfile->objfile_obstack); 2773 psymtab->symtab = NULL; 2774 2775 /* Prepend it to the psymtab list for the objfile it belongs to. 2776 Psymtabs are searched in most recent inserted -> least recent 2777 inserted order. */ 2778 2779 psymtab->objfile = objfile; 2780 psymtab->next = objfile->psymtabs; 2781 objfile->psymtabs = psymtab; 2782#if 0 2783 { 2784 struct partial_symtab **prev_pst; 2785 psymtab->objfile = objfile; 2786 psymtab->next = NULL; 2787 prev_pst = &(objfile->psymtabs); 2788 while ((*prev_pst) != NULL) 2789 prev_pst = &((*prev_pst)->next); 2790 (*prev_pst) = psymtab; 2791 } 2792#endif 2793 2794 return (psymtab); 2795} 2796 2797void 2798discard_psymtab (struct partial_symtab *pst) 2799{ 2800 struct partial_symtab **prev_pst; 2801 2802 /* From dbxread.c: 2803 Empty psymtabs happen as a result of header files which don't 2804 have any symbols in them. There can be a lot of them. But this 2805 check is wrong, in that a psymtab with N_SLINE entries but 2806 nothing else is not empty, but we don't realize that. Fixing 2807 that without slowing things down might be tricky. */ 2808 2809 /* First, snip it out of the psymtab chain */ 2810 2811 prev_pst = &(pst->objfile->psymtabs); 2812 while ((*prev_pst) != pst) 2813 prev_pst = &((*prev_pst)->next); 2814 (*prev_pst) = pst->next; 2815 2816 /* Next, put it on a free list for recycling */ 2817 2818 pst->next = pst->objfile->free_psymtabs; 2819 pst->objfile->free_psymtabs = pst; 2820} 2821 2822 2823/* Reset all data structures in gdb which may contain references to symbol 2824 table data. */ 2825 2826void 2827clear_symtab_users (void) 2828{ 2829 /* Someday, we should do better than this, by only blowing away 2830 the things that really need to be blown. */ 2831 2832 /* Clear the "current" symtab first, because it is no longer valid. 2833 breakpoint_re_set may try to access the current symtab. */ 2834 clear_current_source_symtab_and_line (); 2835 2836 clear_displays (); 2837 breakpoint_re_set (); 2838 set_default_breakpoint (0, 0, 0, 0); 2839 clear_pc_function_cache (); 2840 observer_notify_new_objfile (NULL); 2841 2842 /* Clear globals which might have pointed into a removed objfile. 2843 FIXME: It's not clear which of these are supposed to persist 2844 between expressions and which ought to be reset each time. */ 2845 expression_context_block = NULL; 2846 innermost_block = NULL; 2847 2848 /* Varobj may refer to old symbols, perform a cleanup. */ 2849 varobj_invalidate (); 2850 2851} 2852 2853static void 2854clear_symtab_users_cleanup (void *ignore) 2855{ 2856 clear_symtab_users (); 2857} 2858 2859/* clear_symtab_users_once: 2860 2861 This function is run after symbol reading, or from a cleanup. 2862 If an old symbol table was obsoleted, the old symbol table 2863 has been blown away, but the other GDB data structures that may 2864 reference it have not yet been cleared or re-directed. (The old 2865 symtab was zapped, and the cleanup queued, in free_named_symtab() 2866 below.) 2867 2868 This function can be queued N times as a cleanup, or called 2869 directly; it will do all the work the first time, and then will be a 2870 no-op until the next time it is queued. This works by bumping a 2871 counter at queueing time. Much later when the cleanup is run, or at 2872 the end of symbol processing (in case the cleanup is discarded), if 2873 the queued count is greater than the "done-count", we do the work 2874 and set the done-count to the queued count. If the queued count is 2875 less than or equal to the done-count, we just ignore the call. This 2876 is needed because reading a single .o file will often replace many 2877 symtabs (one per .h file, for example), and we don't want to reset 2878 the breakpoints N times in the user's face. 2879 2880 The reason we both queue a cleanup, and call it directly after symbol 2881 reading, is because the cleanup protects us in case of errors, but is 2882 discarded if symbol reading is successful. */ 2883 2884#if 0 2885/* FIXME: As free_named_symtabs is currently a big noop this function 2886 is no longer needed. */ 2887static void clear_symtab_users_once (void); 2888 2889static int clear_symtab_users_queued; 2890static int clear_symtab_users_done; 2891 2892static void 2893clear_symtab_users_once (void) 2894{ 2895 /* Enforce once-per-`do_cleanups'-semantics */ 2896 if (clear_symtab_users_queued <= clear_symtab_users_done) 2897 return; 2898 clear_symtab_users_done = clear_symtab_users_queued; 2899 2900 clear_symtab_users (); 2901} 2902#endif 2903 2904/* Delete the specified psymtab, and any others that reference it. */ 2905 2906static void 2907cashier_psymtab (struct partial_symtab *pst) 2908{ 2909 struct partial_symtab *ps, *pprev = NULL; 2910 int i; 2911 2912 /* Find its previous psymtab in the chain */ 2913 for (ps = pst->objfile->psymtabs; ps; ps = ps->next) 2914 { 2915 if (ps == pst) 2916 break; 2917 pprev = ps; 2918 } 2919 2920 if (ps) 2921 { 2922 /* Unhook it from the chain. */ 2923 if (ps == pst->objfile->psymtabs) 2924 pst->objfile->psymtabs = ps->next; 2925 else 2926 pprev->next = ps->next; 2927 2928 /* FIXME, we can't conveniently deallocate the entries in the 2929 partial_symbol lists (global_psymbols/static_psymbols) that 2930 this psymtab points to. These just take up space until all 2931 the psymtabs are reclaimed. Ditto the dependencies list and 2932 filename, which are all in the objfile_obstack. */ 2933 2934 /* We need to cashier any psymtab that has this one as a dependency... */ 2935 again: 2936 for (ps = pst->objfile->psymtabs; ps; ps = ps->next) 2937 { 2938 for (i = 0; i < ps->number_of_dependencies; i++) 2939 { 2940 if (ps->dependencies[i] == pst) 2941 { 2942 cashier_psymtab (ps); 2943 goto again; /* Must restart, chain has been munged. */ 2944 } 2945 } 2946 } 2947 } 2948} 2949 2950/* If a symtab or psymtab for filename NAME is found, free it along 2951 with any dependent breakpoints, displays, etc. 2952 Used when loading new versions of object modules with the "add-file" 2953 command. This is only called on the top-level symtab or psymtab's name; 2954 it is not called for subsidiary files such as .h files. 2955 2956 Return value is 1 if we blew away the environment, 0 if not. 2957 FIXME. The return value appears to never be used. 2958 2959 FIXME. I think this is not the best way to do this. We should 2960 work on being gentler to the environment while still cleaning up 2961 all stray pointers into the freed symtab. */ 2962 2963int 2964free_named_symtabs (char *name) 2965{ 2966#if 0 2967 /* FIXME: With the new method of each objfile having it's own 2968 psymtab list, this function needs serious rethinking. In particular, 2969 why was it ever necessary to toss psymtabs with specific compilation 2970 unit filenames, as opposed to all psymtabs from a particular symbol 2971 file? -- fnf 2972 Well, the answer is that some systems permit reloading of particular 2973 compilation units. We want to blow away any old info about these 2974 compilation units, regardless of which objfiles they arrived in. --gnu. */ 2975 2976 struct symtab *s; 2977 struct symtab *prev; 2978 struct partial_symtab *ps; 2979 struct blockvector *bv; 2980 int blewit = 0; 2981 2982 /* We only wack things if the symbol-reload switch is set. */ 2983 if (!symbol_reloading) 2984 return 0; 2985 2986 /* Some symbol formats have trouble providing file names... */ 2987 if (name == 0 || *name == '\0') 2988 return 0; 2989 2990 /* Look for a psymtab with the specified name. */ 2991 2992again2: 2993 for (ps = partial_symtab_list; ps; ps = ps->next) 2994 { 2995 if (strcmp (name, ps->filename) == 0) 2996 { 2997 cashier_psymtab (ps); /* Blow it away...and its little dog, too. */ 2998 goto again2; /* Must restart, chain has been munged */ 2999 } 3000 } 3001 3002 /* Look for a symtab with the specified name. */ 3003 3004 for (s = symtab_list; s; s = s->next) 3005 { 3006 if (strcmp (name, s->filename) == 0) 3007 break; 3008 prev = s; 3009 } 3010 3011 if (s) 3012 { 3013 if (s == symtab_list) 3014 symtab_list = s->next; 3015 else 3016 prev->next = s->next; 3017 3018 /* For now, queue a delete for all breakpoints, displays, etc., whether 3019 or not they depend on the symtab being freed. This should be 3020 changed so that only those data structures affected are deleted. */ 3021 3022 /* But don't delete anything if the symtab is empty. 3023 This test is necessary due to a bug in "dbxread.c" that 3024 causes empty symtabs to be created for N_SO symbols that 3025 contain the pathname of the object file. (This problem 3026 has been fixed in GDB 3.9x). */ 3027 3028 bv = BLOCKVECTOR (s); 3029 if (BLOCKVECTOR_NBLOCKS (bv) > 2 3030 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK)) 3031 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK))) 3032 { 3033 complaint (&symfile_complaints, _("Replacing old symbols for `%s'"), 3034 name); 3035 clear_symtab_users_queued++; 3036 make_cleanup (clear_symtab_users_once, 0); 3037 blewit = 1; 3038 } 3039 else 3040 complaint (&symfile_complaints, _("Empty symbol table found for `%s'"), 3041 name); 3042 3043 free_symtab (s); 3044 } 3045 else 3046 { 3047 /* It is still possible that some breakpoints will be affected 3048 even though no symtab was found, since the file might have 3049 been compiled without debugging, and hence not be associated 3050 with a symtab. In order to handle this correctly, we would need 3051 to keep a list of text address ranges for undebuggable files. 3052 For now, we do nothing, since this is a fairly obscure case. */ 3053 ; 3054 } 3055 3056 /* FIXME, what about the minimal symbol table? */ 3057 return blewit; 3058#else 3059 return (0); 3060#endif 3061} 3062 3063/* Allocate and partially fill a partial symtab. It will be 3064 completely filled at the end of the symbol list. 3065 3066 FILENAME is the name of the symbol-file we are reading from. */ 3067 3068struct partial_symtab * 3069start_psymtab_common (struct objfile *objfile, 3070 struct section_offsets *section_offsets, char *filename, 3071 CORE_ADDR textlow, struct partial_symbol **global_syms, 3072 struct partial_symbol **static_syms) 3073{ 3074 struct partial_symtab *psymtab; 3075 3076 psymtab = allocate_psymtab (filename, objfile); 3077 psymtab->section_offsets = section_offsets; 3078 psymtab->textlow = textlow; 3079 psymtab->texthigh = psymtab->textlow; /* default */ 3080 psymtab->globals_offset = global_syms - objfile->global_psymbols.list; 3081 psymtab->statics_offset = static_syms - objfile->static_psymbols.list; 3082 return (psymtab); 3083} 3084 3085/* Add a symbol with a long value to a psymtab. 3086 Since one arg is a struct, we pass in a ptr and deref it (sigh). 3087 Return the partial symbol that has been added. */ 3088 3089/* NOTE: carlton/2003-09-11: The reason why we return the partial 3090 symbol is so that callers can get access to the symbol's demangled 3091 name, which they don't have any cheap way to determine otherwise. 3092 (Currenly, dwarf2read.c is the only file who uses that information, 3093 though it's possible that other readers might in the future.) 3094 Elena wasn't thrilled about that, and I don't blame her, but we 3095 couldn't come up with a better way to get that information. If 3096 it's needed in other situations, we could consider breaking up 3097 SYMBOL_SET_NAMES to provide access to the demangled name lookup 3098 cache. */ 3099 3100const struct partial_symbol * 3101add_psymbol_to_list (char *name, int namelength, domain_enum domain, 3102 enum address_class class, 3103 struct psymbol_allocation_list *list, long val, /* Value as a long */ 3104 CORE_ADDR coreaddr, /* Value as a CORE_ADDR */ 3105 enum language language, struct objfile *objfile) 3106{ 3107 struct partial_symbol *psym; 3108 char *buf = alloca (namelength + 1); 3109 /* psymbol is static so that there will be no uninitialized gaps in the 3110 structure which might contain random data, causing cache misses in 3111 bcache. */ 3112 static struct partial_symbol psymbol; 3113 3114 /* Create local copy of the partial symbol */ 3115 memcpy (buf, name, namelength); 3116 buf[namelength] = '\0'; 3117 /* val and coreaddr are mutually exclusive, one of them *will* be zero */ 3118 if (val != 0) 3119 { 3120 SYMBOL_VALUE (&psymbol) = val; 3121 } 3122 else 3123 { 3124 SYMBOL_VALUE_ADDRESS (&psymbol) = coreaddr; 3125 } 3126 SYMBOL_SECTION (&psymbol) = 0; 3127 SYMBOL_LANGUAGE (&psymbol) = language; 3128 PSYMBOL_DOMAIN (&psymbol) = domain; 3129 PSYMBOL_CLASS (&psymbol) = class; 3130 3131 SYMBOL_SET_NAMES (&psymbol, buf, namelength, objfile); 3132 3133 /* Stash the partial symbol away in the cache */ 3134 psym = deprecated_bcache (&psymbol, sizeof (struct partial_symbol), 3135 objfile->psymbol_cache); 3136 3137 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */ 3138 if (list->next >= list->list + list->size) 3139 { 3140 extend_psymbol_list (list, objfile); 3141 } 3142 *list->next++ = psym; 3143 OBJSTAT (objfile, n_psyms++); 3144 3145 return psym; 3146} 3147 3148/* Initialize storage for partial symbols. */ 3149 3150void 3151init_psymbol_list (struct objfile *objfile, int total_symbols) 3152{ 3153 /* Free any previously allocated psymbol lists. */ 3154 3155 if (objfile->global_psymbols.list) 3156 { 3157 xfree (objfile->global_psymbols.list); 3158 } 3159 if (objfile->static_psymbols.list) 3160 { 3161 xfree (objfile->static_psymbols.list); 3162 } 3163 3164 /* Current best guess is that approximately a twentieth 3165 of the total symbols (in a debugging file) are global or static 3166 oriented symbols */ 3167 3168 objfile->global_psymbols.size = total_symbols / 10; 3169 objfile->static_psymbols.size = total_symbols / 10; 3170 3171 if (objfile->global_psymbols.size > 0) 3172 { 3173 objfile->global_psymbols.next = 3174 objfile->global_psymbols.list = (struct partial_symbol **) 3175 xmalloc ((objfile->global_psymbols.size 3176 * sizeof (struct partial_symbol *))); 3177 } 3178 if (objfile->static_psymbols.size > 0) 3179 { 3180 objfile->static_psymbols.next = 3181 objfile->static_psymbols.list = (struct partial_symbol **) 3182 xmalloc ((objfile->static_psymbols.size 3183 * sizeof (struct partial_symbol *))); 3184 } 3185} 3186 3187/* OVERLAYS: 3188 The following code implements an abstraction for debugging overlay sections. 3189 3190 The target model is as follows: 3191 1) The gnu linker will permit multiple sections to be mapped into the 3192 same VMA, each with its own unique LMA (or load address). 3193 2) It is assumed that some runtime mechanism exists for mapping the 3194 sections, one by one, from the load address into the VMA address. 3195 3) This code provides a mechanism for gdb to keep track of which 3196 sections should be considered to be mapped from the VMA to the LMA. 3197 This information is used for symbol lookup, and memory read/write. 3198 For instance, if a section has been mapped then its contents 3199 should be read from the VMA, otherwise from the LMA. 3200 3201 Two levels of debugger support for overlays are available. One is 3202 "manual", in which the debugger relies on the user to tell it which 3203 overlays are currently mapped. This level of support is 3204 implemented entirely in the core debugger, and the information about 3205 whether a section is mapped is kept in the objfile->obj_section table. 3206 3207 The second level of support is "automatic", and is only available if 3208 the target-specific code provides functionality to read the target's 3209 overlay mapping table, and translate its contents for the debugger 3210 (by updating the mapped state information in the obj_section tables). 3211 3212 The interface is as follows: 3213 User commands: 3214 overlay map <name> -- tell gdb to consider this section mapped 3215 overlay unmap <name> -- tell gdb to consider this section unmapped 3216 overlay list -- list the sections that GDB thinks are mapped 3217 overlay read-target -- get the target's state of what's mapped 3218 overlay off/manual/auto -- set overlay debugging state 3219 Functional interface: 3220 find_pc_mapped_section(pc): if the pc is in the range of a mapped 3221 section, return that section. 3222 find_pc_overlay(pc): find any overlay section that contains 3223 the pc, either in its VMA or its LMA 3224 overlay_is_mapped(sect): true if overlay is marked as mapped 3225 section_is_overlay(sect): true if section's VMA != LMA 3226 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA 3227 pc_in_unmapped_range(...): true if pc belongs to section's LMA 3228 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap 3229 overlay_mapped_address(...): map an address from section's LMA to VMA 3230 overlay_unmapped_address(...): map an address from section's VMA to LMA 3231 symbol_overlayed_address(...): Return a "current" address for symbol: 3232 either in VMA or LMA depending on whether 3233 the symbol's section is currently mapped 3234 */ 3235 3236/* Overlay debugging state: */ 3237 3238enum overlay_debugging_state overlay_debugging = ovly_off; 3239int overlay_cache_invalid = 0; /* True if need to refresh mapped state */ 3240 3241/* Function: section_is_overlay (SECTION) 3242 Returns true if SECTION has VMA not equal to LMA, ie. 3243 SECTION is loaded at an address different from where it will "run". */ 3244 3245int 3246section_is_overlay (asection *section) 3247{ 3248 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */ 3249 3250 if (overlay_debugging) 3251 if (section && section->lma != 0 && 3252 section->vma != section->lma) 3253 return 1; 3254 3255 return 0; 3256} 3257 3258/* Function: overlay_invalidate_all (void) 3259 Invalidate the mapped state of all overlay sections (mark it as stale). */ 3260 3261static void 3262overlay_invalidate_all (void) 3263{ 3264 struct objfile *objfile; 3265 struct obj_section *sect; 3266 3267 ALL_OBJSECTIONS (objfile, sect) 3268 if (section_is_overlay (sect->the_bfd_section)) 3269 sect->ovly_mapped = -1; 3270} 3271 3272/* Function: overlay_is_mapped (SECTION) 3273 Returns true if section is an overlay, and is currently mapped. 3274 Private: public access is thru function section_is_mapped. 3275 3276 Access to the ovly_mapped flag is restricted to this function, so 3277 that we can do automatic update. If the global flag 3278 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call 3279 overlay_invalidate_all. If the mapped state of the particular 3280 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */ 3281 3282static int 3283overlay_is_mapped (struct obj_section *osect) 3284{ 3285 if (osect == 0 || !section_is_overlay (osect->the_bfd_section)) 3286 return 0; 3287 3288 switch (overlay_debugging) 3289 { 3290 default: 3291 case ovly_off: 3292 return 0; /* overlay debugging off */ 3293 case ovly_auto: /* overlay debugging automatic */ 3294 /* Unles there is a gdbarch_overlay_update function, 3295 there's really nothing useful to do here (can't really go auto) */ 3296 if (gdbarch_overlay_update_p (current_gdbarch)) 3297 { 3298 if (overlay_cache_invalid) 3299 { 3300 overlay_invalidate_all (); 3301 overlay_cache_invalid = 0; 3302 } 3303 if (osect->ovly_mapped == -1) 3304 gdbarch_overlay_update (current_gdbarch, osect); 3305 } 3306 /* fall thru to manual case */ 3307 case ovly_on: /* overlay debugging manual */ 3308 return osect->ovly_mapped == 1; 3309 } 3310} 3311 3312/* Function: section_is_mapped 3313 Returns true if section is an overlay, and is currently mapped. */ 3314 3315int 3316section_is_mapped (asection *section) 3317{ 3318 struct objfile *objfile; 3319 struct obj_section *osect; 3320 3321 if (overlay_debugging) 3322 if (section && section_is_overlay (section)) 3323 ALL_OBJSECTIONS (objfile, osect) 3324 if (osect->the_bfd_section == section) 3325 return overlay_is_mapped (osect); 3326 3327 return 0; 3328} 3329 3330/* Function: pc_in_unmapped_range 3331 If PC falls into the lma range of SECTION, return true, else false. */ 3332 3333CORE_ADDR 3334pc_in_unmapped_range (CORE_ADDR pc, asection *section) 3335{ 3336 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */ 3337 3338 int size; 3339 3340 if (overlay_debugging) 3341 if (section && section_is_overlay (section)) 3342 { 3343 size = bfd_get_section_size (section); 3344 if (section->lma <= pc && pc < section->lma + size) 3345 return 1; 3346 } 3347 return 0; 3348} 3349 3350/* Function: pc_in_mapped_range 3351 If PC falls into the vma range of SECTION, return true, else false. */ 3352 3353CORE_ADDR 3354pc_in_mapped_range (CORE_ADDR pc, asection *section) 3355{ 3356 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */ 3357 3358 int size; 3359 3360 if (overlay_debugging) 3361 if (section && section_is_overlay (section)) 3362 { 3363 size = bfd_get_section_size (section); 3364 if (section->vma <= pc && pc < section->vma + size) 3365 return 1; 3366 } 3367 return 0; 3368} 3369 3370 3371/* Return true if the mapped ranges of sections A and B overlap, false 3372 otherwise. */ 3373static int 3374sections_overlap (asection *a, asection *b) 3375{ 3376 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */ 3377 3378 CORE_ADDR a_start = a->vma; 3379 CORE_ADDR a_end = a->vma + bfd_get_section_size (a); 3380 CORE_ADDR b_start = b->vma; 3381 CORE_ADDR b_end = b->vma + bfd_get_section_size (b); 3382 3383 return (a_start < b_end && b_start < a_end); 3384} 3385 3386/* Function: overlay_unmapped_address (PC, SECTION) 3387 Returns the address corresponding to PC in the unmapped (load) range. 3388 May be the same as PC. */ 3389 3390CORE_ADDR 3391overlay_unmapped_address (CORE_ADDR pc, asection *section) 3392{ 3393 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */ 3394 3395 if (overlay_debugging) 3396 if (section && section_is_overlay (section) && 3397 pc_in_mapped_range (pc, section)) 3398 return pc + section->lma - section->vma; 3399 3400 return pc; 3401} 3402 3403/* Function: overlay_mapped_address (PC, SECTION) 3404 Returns the address corresponding to PC in the mapped (runtime) range. 3405 May be the same as PC. */ 3406 3407CORE_ADDR 3408overlay_mapped_address (CORE_ADDR pc, asection *section) 3409{ 3410 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */ 3411 3412 if (overlay_debugging) 3413 if (section && section_is_overlay (section) && 3414 pc_in_unmapped_range (pc, section)) 3415 return pc + section->vma - section->lma; 3416 3417 return pc; 3418} 3419 3420 3421/* Function: symbol_overlayed_address 3422 Return one of two addresses (relative to the VMA or to the LMA), 3423 depending on whether the section is mapped or not. */ 3424 3425CORE_ADDR 3426symbol_overlayed_address (CORE_ADDR address, asection *section) 3427{ 3428 if (overlay_debugging) 3429 { 3430 /* If the symbol has no section, just return its regular address. */ 3431 if (section == 0) 3432 return address; 3433 /* If the symbol's section is not an overlay, just return its address */ 3434 if (!section_is_overlay (section)) 3435 return address; 3436 /* If the symbol's section is mapped, just return its address */ 3437 if (section_is_mapped (section)) 3438 return address; 3439 /* 3440 * HOWEVER: if the symbol is in an overlay section which is NOT mapped, 3441 * then return its LOADED address rather than its vma address!! 3442 */ 3443 return overlay_unmapped_address (address, section); 3444 } 3445 return address; 3446} 3447 3448/* Function: find_pc_overlay (PC) 3449 Return the best-match overlay section for PC: 3450 If PC matches a mapped overlay section's VMA, return that section. 3451 Else if PC matches an unmapped section's VMA, return that section. 3452 Else if PC matches an unmapped section's LMA, return that section. */ 3453 3454asection * 3455find_pc_overlay (CORE_ADDR pc) 3456{ 3457 struct objfile *objfile; 3458 struct obj_section *osect, *best_match = NULL; 3459 3460 if (overlay_debugging) 3461 ALL_OBJSECTIONS (objfile, osect) 3462 if (section_is_overlay (osect->the_bfd_section)) 3463 { 3464 if (pc_in_mapped_range (pc, osect->the_bfd_section)) 3465 { 3466 if (overlay_is_mapped (osect)) 3467 return osect->the_bfd_section; 3468 else 3469 best_match = osect; 3470 } 3471 else if (pc_in_unmapped_range (pc, osect->the_bfd_section)) 3472 best_match = osect; 3473 } 3474 return best_match ? best_match->the_bfd_section : NULL; 3475} 3476 3477/* Function: find_pc_mapped_section (PC) 3478 If PC falls into the VMA address range of an overlay section that is 3479 currently marked as MAPPED, return that section. Else return NULL. */ 3480 3481asection * 3482find_pc_mapped_section (CORE_ADDR pc) 3483{ 3484 struct objfile *objfile; 3485 struct obj_section *osect; 3486 3487 if (overlay_debugging) 3488 ALL_OBJSECTIONS (objfile, osect) 3489 if (pc_in_mapped_range (pc, osect->the_bfd_section) && 3490 overlay_is_mapped (osect)) 3491 return osect->the_bfd_section; 3492 3493 return NULL; 3494} 3495 3496/* Function: list_overlays_command 3497 Print a list of mapped sections and their PC ranges */ 3498 3499void 3500list_overlays_command (char *args, int from_tty) 3501{ 3502 int nmapped = 0; 3503 struct objfile *objfile; 3504 struct obj_section *osect; 3505 3506 if (overlay_debugging) 3507 ALL_OBJSECTIONS (objfile, osect) 3508 if (overlay_is_mapped (osect)) 3509 { 3510 const char *name; 3511 bfd_vma lma, vma; 3512 int size; 3513 3514 vma = bfd_section_vma (objfile->obfd, osect->the_bfd_section); 3515 lma = bfd_section_lma (objfile->obfd, osect->the_bfd_section); 3516 size = bfd_get_section_size (osect->the_bfd_section); 3517 name = bfd_section_name (objfile->obfd, osect->the_bfd_section); 3518 3519 printf_filtered ("Section %s, loaded at ", name); 3520 deprecated_print_address_numeric (lma, 1, gdb_stdout); 3521 puts_filtered (" - "); 3522 deprecated_print_address_numeric (lma + size, 1, gdb_stdout); 3523 printf_filtered (", mapped at "); 3524 deprecated_print_address_numeric (vma, 1, gdb_stdout); 3525 puts_filtered (" - "); 3526 deprecated_print_address_numeric (vma + size, 1, gdb_stdout); 3527 puts_filtered ("\n"); 3528 3529 nmapped++; 3530 } 3531 if (nmapped == 0) 3532 printf_filtered (_("No sections are mapped.\n")); 3533} 3534 3535/* Function: map_overlay_command 3536 Mark the named section as mapped (ie. residing at its VMA address). */ 3537 3538void 3539map_overlay_command (char *args, int from_tty) 3540{ 3541 struct objfile *objfile, *objfile2; 3542 struct obj_section *sec, *sec2; 3543 asection *bfdsec; 3544 3545 if (!overlay_debugging) 3546 error (_("\ 3547Overlay debugging not enabled. Use either the 'overlay auto' or\n\ 3548the 'overlay manual' command.")); 3549 3550 if (args == 0 || *args == 0) 3551 error (_("Argument required: name of an overlay section")); 3552 3553 /* First, find a section matching the user supplied argument */ 3554 ALL_OBJSECTIONS (objfile, sec) 3555 if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args)) 3556 { 3557 /* Now, check to see if the section is an overlay. */ 3558 bfdsec = sec->the_bfd_section; 3559 if (!section_is_overlay (bfdsec)) 3560 continue; /* not an overlay section */ 3561 3562 /* Mark the overlay as "mapped" */ 3563 sec->ovly_mapped = 1; 3564 3565 /* Next, make a pass and unmap any sections that are 3566 overlapped by this new section: */ 3567 ALL_OBJSECTIONS (objfile2, sec2) 3568 if (sec2->ovly_mapped 3569 && sec != sec2 3570 && sec->the_bfd_section != sec2->the_bfd_section 3571 && sections_overlap (sec->the_bfd_section, 3572 sec2->the_bfd_section)) 3573 { 3574 if (info_verbose) 3575 printf_unfiltered (_("Note: section %s unmapped by overlap\n"), 3576 bfd_section_name (objfile->obfd, 3577 sec2->the_bfd_section)); 3578 sec2->ovly_mapped = 0; /* sec2 overlaps sec: unmap sec2 */ 3579 } 3580 return; 3581 } 3582 error (_("No overlay section called %s"), args); 3583} 3584 3585/* Function: unmap_overlay_command 3586 Mark the overlay section as unmapped 3587 (ie. resident in its LMA address range, rather than the VMA range). */ 3588 3589void 3590unmap_overlay_command (char *args, int from_tty) 3591{ 3592 struct objfile *objfile; 3593 struct obj_section *sec; 3594 3595 if (!overlay_debugging) 3596 error (_("\ 3597Overlay debugging not enabled. Use either the 'overlay auto' or\n\ 3598the 'overlay manual' command.")); 3599 3600 if (args == 0 || *args == 0) 3601 error (_("Argument required: name of an overlay section")); 3602 3603 /* First, find a section matching the user supplied argument */ 3604 ALL_OBJSECTIONS (objfile, sec) 3605 if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args)) 3606 { 3607 if (!sec->ovly_mapped) 3608 error (_("Section %s is not mapped"), args); 3609 sec->ovly_mapped = 0; 3610 return; 3611 } 3612 error (_("No overlay section called %s"), args); 3613} 3614 3615/* Function: overlay_auto_command 3616 A utility command to turn on overlay debugging. 3617 Possibly this should be done via a set/show command. */ 3618 3619static void 3620overlay_auto_command (char *args, int from_tty) 3621{ 3622 overlay_debugging = ovly_auto; 3623 enable_overlay_breakpoints (); 3624 if (info_verbose) 3625 printf_unfiltered (_("Automatic overlay debugging enabled.")); 3626} 3627 3628/* Function: overlay_manual_command 3629 A utility command to turn on overlay debugging. 3630 Possibly this should be done via a set/show command. */ 3631 3632static void 3633overlay_manual_command (char *args, int from_tty) 3634{ 3635 overlay_debugging = ovly_on; 3636 disable_overlay_breakpoints (); 3637 if (info_verbose) 3638 printf_unfiltered (_("Overlay debugging enabled.")); 3639} 3640 3641/* Function: overlay_off_command 3642 A utility command to turn on overlay debugging. 3643 Possibly this should be done via a set/show command. */ 3644 3645static void 3646overlay_off_command (char *args, int from_tty) 3647{ 3648 overlay_debugging = ovly_off; 3649 disable_overlay_breakpoints (); 3650 if (info_verbose) 3651 printf_unfiltered (_("Overlay debugging disabled.")); 3652} 3653 3654static void 3655overlay_load_command (char *args, int from_tty) 3656{ 3657 if (gdbarch_overlay_update_p (current_gdbarch)) 3658 gdbarch_overlay_update (current_gdbarch, NULL); 3659 else 3660 error (_("This target does not know how to read its overlay state.")); 3661} 3662 3663/* Function: overlay_command 3664 A place-holder for a mis-typed command */ 3665 3666/* Command list chain containing all defined "overlay" subcommands. */ 3667struct cmd_list_element *overlaylist; 3668 3669static void 3670overlay_command (char *args, int from_tty) 3671{ 3672 printf_unfiltered 3673 ("\"overlay\" must be followed by the name of an overlay command.\n"); 3674 help_list (overlaylist, "overlay ", -1, gdb_stdout); 3675} 3676 3677 3678/* Target Overlays for the "Simplest" overlay manager: 3679 3680 This is GDB's default target overlay layer. It works with the 3681 minimal overlay manager supplied as an example by Cygnus. The 3682 entry point is via a function pointer "gdbarch_overlay_update", 3683 so targets that use a different runtime overlay manager can 3684 substitute their own overlay_update function and take over the 3685 function pointer. 3686 3687 The overlay_update function pokes around in the target's data structures 3688 to see what overlays are mapped, and updates GDB's overlay mapping with 3689 this information. 3690 3691 In this simple implementation, the target data structures are as follows: 3692 unsigned _novlys; /# number of overlay sections #/ 3693 unsigned _ovly_table[_novlys][4] = { 3694 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/ 3695 {..., ..., ..., ...}, 3696 } 3697 unsigned _novly_regions; /# number of overlay regions #/ 3698 unsigned _ovly_region_table[_novly_regions][3] = { 3699 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/ 3700 {..., ..., ...}, 3701 } 3702 These functions will attempt to update GDB's mappedness state in the 3703 symbol section table, based on the target's mappedness state. 3704 3705 To do this, we keep a cached copy of the target's _ovly_table, and 3706 attempt to detect when the cached copy is invalidated. The main 3707 entry point is "simple_overlay_update(SECT), which looks up SECT in 3708 the cached table and re-reads only the entry for that section from 3709 the target (whenever possible). 3710 */ 3711 3712/* Cached, dynamically allocated copies of the target data structures: */ 3713static unsigned (*cache_ovly_table)[4] = 0; 3714#if 0 3715static unsigned (*cache_ovly_region_table)[3] = 0; 3716#endif 3717static unsigned cache_novlys = 0; 3718#if 0 3719static unsigned cache_novly_regions = 0; 3720#endif 3721static CORE_ADDR cache_ovly_table_base = 0; 3722#if 0 3723static CORE_ADDR cache_ovly_region_table_base = 0; 3724#endif 3725enum ovly_index 3726 { 3727 VMA, SIZE, LMA, MAPPED 3728 }; 3729#define TARGET_LONG_BYTES (gdbarch_long_bit (current_gdbarch) \ 3730 / TARGET_CHAR_BIT) 3731 3732/* Throw away the cached copy of _ovly_table */ 3733static void 3734simple_free_overlay_table (void) 3735{ 3736 if (cache_ovly_table) 3737 xfree (cache_ovly_table); 3738 cache_novlys = 0; 3739 cache_ovly_table = NULL; 3740 cache_ovly_table_base = 0; 3741} 3742 3743#if 0 3744/* Throw away the cached copy of _ovly_region_table */ 3745static void 3746simple_free_overlay_region_table (void) 3747{ 3748 if (cache_ovly_region_table) 3749 xfree (cache_ovly_region_table); 3750 cache_novly_regions = 0; 3751 cache_ovly_region_table = NULL; 3752 cache_ovly_region_table_base = 0; 3753} 3754#endif 3755 3756/* Read an array of ints from the target into a local buffer. 3757 Convert to host order. int LEN is number of ints */ 3758static void 3759read_target_long_array (CORE_ADDR memaddr, unsigned int *myaddr, int len) 3760{ 3761 /* FIXME (alloca): Not safe if array is very large. */ 3762 gdb_byte *buf = alloca (len * TARGET_LONG_BYTES); 3763 int i; 3764 3765 read_memory (memaddr, buf, len * TARGET_LONG_BYTES); 3766 for (i = 0; i < len; i++) 3767 myaddr[i] = extract_unsigned_integer (TARGET_LONG_BYTES * i + buf, 3768 TARGET_LONG_BYTES); 3769} 3770 3771/* Find and grab a copy of the target _ovly_table 3772 (and _novlys, which is needed for the table's size) */ 3773static int 3774simple_read_overlay_table (void) 3775{ 3776 struct minimal_symbol *novlys_msym, *ovly_table_msym; 3777 3778 simple_free_overlay_table (); 3779 novlys_msym = lookup_minimal_symbol ("_novlys", NULL, NULL); 3780 if (! novlys_msym) 3781 { 3782 error (_("Error reading inferior's overlay table: " 3783 "couldn't find `_novlys' variable\n" 3784 "in inferior. Use `overlay manual' mode.")); 3785 return 0; 3786 } 3787 3788 ovly_table_msym = lookup_minimal_symbol ("_ovly_table", NULL, NULL); 3789 if (! ovly_table_msym) 3790 { 3791 error (_("Error reading inferior's overlay table: couldn't find " 3792 "`_ovly_table' array\n" 3793 "in inferior. Use `overlay manual' mode.")); 3794 return 0; 3795 } 3796 3797 cache_novlys = read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym), 4); 3798 cache_ovly_table 3799 = (void *) xmalloc (cache_novlys * sizeof (*cache_ovly_table)); 3800 cache_ovly_table_base = SYMBOL_VALUE_ADDRESS (ovly_table_msym); 3801 read_target_long_array (cache_ovly_table_base, 3802 (unsigned int *) cache_ovly_table, 3803 cache_novlys * 4); 3804 3805 return 1; /* SUCCESS */ 3806} 3807 3808#if 0 3809/* Find and grab a copy of the target _ovly_region_table 3810 (and _novly_regions, which is needed for the table's size) */ 3811static int 3812simple_read_overlay_region_table (void) 3813{ 3814 struct minimal_symbol *msym; 3815 3816 simple_free_overlay_region_table (); 3817 msym = lookup_minimal_symbol ("_novly_regions", NULL, NULL); 3818 if (msym != NULL) 3819 cache_novly_regions = read_memory_integer (SYMBOL_VALUE_ADDRESS (msym), 4); 3820 else 3821 return 0; /* failure */ 3822 cache_ovly_region_table = (void *) xmalloc (cache_novly_regions * 12); 3823 if (cache_ovly_region_table != NULL) 3824 { 3825 msym = lookup_minimal_symbol ("_ovly_region_table", NULL, NULL); 3826 if (msym != NULL) 3827 { 3828 cache_ovly_region_table_base = SYMBOL_VALUE_ADDRESS (msym); 3829 read_target_long_array (cache_ovly_region_table_base, 3830 (unsigned int *) cache_ovly_region_table, 3831 cache_novly_regions * 3); 3832 } 3833 else 3834 return 0; /* failure */ 3835 } 3836 else 3837 return 0; /* failure */ 3838 return 1; /* SUCCESS */ 3839} 3840#endif 3841 3842/* Function: simple_overlay_update_1 3843 A helper function for simple_overlay_update. Assuming a cached copy 3844 of _ovly_table exists, look through it to find an entry whose vma, 3845 lma and size match those of OSECT. Re-read the entry and make sure 3846 it still matches OSECT (else the table may no longer be valid). 3847 Set OSECT's mapped state to match the entry. Return: 1 for 3848 success, 0 for failure. */ 3849 3850static int 3851simple_overlay_update_1 (struct obj_section *osect) 3852{ 3853 int i, size; 3854 bfd *obfd = osect->objfile->obfd; 3855 asection *bsect = osect->the_bfd_section; 3856 3857 size = bfd_get_section_size (osect->the_bfd_section); 3858 for (i = 0; i < cache_novlys; i++) 3859 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect) 3860 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect) 3861 /* && cache_ovly_table[i][SIZE] == size */ ) 3862 { 3863 read_target_long_array (cache_ovly_table_base + i * TARGET_LONG_BYTES, 3864 (unsigned int *) cache_ovly_table[i], 4); 3865 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect) 3866 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect) 3867 /* && cache_ovly_table[i][SIZE] == size */ ) 3868 { 3869 osect->ovly_mapped = cache_ovly_table[i][MAPPED]; 3870 return 1; 3871 } 3872 else /* Warning! Warning! Target's ovly table has changed! */ 3873 return 0; 3874 } 3875 return 0; 3876} 3877 3878/* Function: simple_overlay_update 3879 If OSECT is NULL, then update all sections' mapped state 3880 (after re-reading the entire target _ovly_table). 3881 If OSECT is non-NULL, then try to find a matching entry in the 3882 cached ovly_table and update only OSECT's mapped state. 3883 If a cached entry can't be found or the cache isn't valid, then 3884 re-read the entire cache, and go ahead and update all sections. */ 3885 3886void 3887simple_overlay_update (struct obj_section *osect) 3888{ 3889 struct objfile *objfile; 3890 3891 /* Were we given an osect to look up? NULL means do all of them. */ 3892 if (osect) 3893 /* Have we got a cached copy of the target's overlay table? */ 3894 if (cache_ovly_table != NULL) 3895 /* Does its cached location match what's currently in the symtab? */ 3896 if (cache_ovly_table_base == 3897 SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", NULL, NULL))) 3898 /* Then go ahead and try to look up this single section in the cache */ 3899 if (simple_overlay_update_1 (osect)) 3900 /* Found it! We're done. */ 3901 return; 3902 3903 /* Cached table no good: need to read the entire table anew. 3904 Or else we want all the sections, in which case it's actually 3905 more efficient to read the whole table in one block anyway. */ 3906 3907 if (! simple_read_overlay_table ()) 3908 return; 3909 3910 /* Now may as well update all sections, even if only one was requested. */ 3911 ALL_OBJSECTIONS (objfile, osect) 3912 if (section_is_overlay (osect->the_bfd_section)) 3913 { 3914 int i, size; 3915 bfd *obfd = osect->objfile->obfd; 3916 asection *bsect = osect->the_bfd_section; 3917 3918 size = bfd_get_section_size (bsect); 3919 for (i = 0; i < cache_novlys; i++) 3920 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect) 3921 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect) 3922 /* && cache_ovly_table[i][SIZE] == size */ ) 3923 { /* obj_section matches i'th entry in ovly_table */ 3924 osect->ovly_mapped = cache_ovly_table[i][MAPPED]; 3925 break; /* finished with inner for loop: break out */ 3926 } 3927 } 3928} 3929 3930/* Set the output sections and output offsets for section SECTP in 3931 ABFD. The relocation code in BFD will read these offsets, so we 3932 need to be sure they're initialized. We map each section to itself, 3933 with no offset; this means that SECTP->vma will be honored. */ 3934 3935static void 3936symfile_dummy_outputs (bfd *abfd, asection *sectp, void *dummy) 3937{ 3938 sectp->output_section = sectp; 3939 sectp->output_offset = 0; 3940} 3941 3942/* Relocate the contents of a debug section SECTP in ABFD. The 3943 contents are stored in BUF if it is non-NULL, or returned in a 3944 malloc'd buffer otherwise. 3945 3946 For some platforms and debug info formats, shared libraries contain 3947 relocations against the debug sections (particularly for DWARF-2; 3948 one affected platform is PowerPC GNU/Linux, although it depends on 3949 the version of the linker in use). Also, ELF object files naturally 3950 have unresolved relocations for their debug sections. We need to apply 3951 the relocations in order to get the locations of symbols correct. */ 3952 3953bfd_byte * 3954symfile_relocate_debug_section (bfd *abfd, asection *sectp, bfd_byte *buf) 3955{ 3956 /* We're only interested in debugging sections with relocation 3957 information. */ 3958 if ((sectp->flags & SEC_RELOC) == 0) 3959 return NULL; 3960 if ((sectp->flags & SEC_DEBUGGING) == 0) 3961 return NULL; 3962 3963 /* We will handle section offsets properly elsewhere, so relocate as if 3964 all sections begin at 0. */ 3965 bfd_map_over_sections (abfd, symfile_dummy_outputs, NULL); 3966 3967 return bfd_simple_get_relocated_section_contents (abfd, sectp, buf, NULL); 3968} 3969 3970struct symfile_segment_data * 3971get_symfile_segment_data (bfd *abfd) 3972{ 3973 struct sym_fns *sf = find_sym_fns (abfd); 3974 3975 if (sf == NULL) 3976 return NULL; 3977 3978 return sf->sym_segments (abfd); 3979} 3980 3981void 3982free_symfile_segment_data (struct symfile_segment_data *data) 3983{ 3984 xfree (data->segment_bases); 3985 xfree (data->segment_sizes); 3986 xfree (data->segment_info); 3987 xfree (data); 3988} 3989 3990 3991/* Given: 3992 - DATA, containing segment addresses from the object file ABFD, and 3993 the mapping from ABFD's sections onto the segments that own them, 3994 and 3995 - SEGMENT_BASES[0 .. NUM_SEGMENT_BASES - 1], holding the actual 3996 segment addresses reported by the target, 3997 store the appropriate offsets for each section in OFFSETS. 3998 3999 If there are fewer entries in SEGMENT_BASES than there are segments 4000 in DATA, then apply SEGMENT_BASES' last entry to all the segments. 4001 4002 If there are more, then verify that all the excess addresses are 4003 the same as the last legitimate one, and then ignore them. This 4004 allows "TextSeg=X;DataSeg=X" qOffset replies for files which have 4005 only a single segment. */ 4006int 4007symfile_map_offsets_to_segments (bfd *abfd, struct symfile_segment_data *data, 4008 struct section_offsets *offsets, 4009 int num_segment_bases, 4010 const CORE_ADDR *segment_bases) 4011{ 4012 int i; 4013 asection *sect; 4014 4015 /* It doesn't make sense to call this function unless you have some 4016 segment base addresses. */ 4017 gdb_assert (segment_bases > 0); 4018 4019 /* If we do not have segment mappings for the object file, we 4020 can not relocate it by segments. */ 4021 gdb_assert (data != NULL); 4022 gdb_assert (data->num_segments > 0); 4023 4024 /* Check any extra SEGMENT_BASES entries. */ 4025 if (num_segment_bases > data->num_segments) 4026 for (i = data->num_segments; i < num_segment_bases; i++) 4027 if (segment_bases[i] != segment_bases[data->num_segments - 1]) 4028 return 0; 4029 4030 for (i = 0, sect = abfd->sections; sect != NULL; i++, sect = sect->next) 4031 { 4032 int which = data->segment_info[i]; 4033 4034 gdb_assert (0 <= which && which <= data->num_segments); 4035 4036 /* Don't bother computing offsets for sections that aren't 4037 loaded as part of any segment. */ 4038 if (! which) 4039 continue; 4040 4041 /* Use the last SEGMENT_BASES entry as the address of any extra 4042 segments mentioned in DATA->segment_info. */ 4043 if (which > num_segment_bases) 4044 which = num_segment_bases; 4045 4046 offsets->offsets[i] = (segment_bases[which - 1] 4047 - data->segment_bases[which - 1]); 4048 } 4049 4050 return 1; 4051} 4052 4053static void 4054symfile_find_segment_sections (struct objfile *objfile) 4055{ 4056 bfd *abfd = objfile->obfd; 4057 int i; 4058 asection *sect; 4059 struct symfile_segment_data *data; 4060 4061 data = get_symfile_segment_data (objfile->obfd); 4062 if (data == NULL) 4063 return; 4064 4065 if (data->num_segments != 1 && data->num_segments != 2) 4066 { 4067 free_symfile_segment_data (data); 4068 return; 4069 } 4070 4071 for (i = 0, sect = abfd->sections; sect != NULL; i++, sect = sect->next) 4072 { 4073 CORE_ADDR vma; 4074 int which = data->segment_info[i]; 4075 4076 if (which == 1) 4077 { 4078 if (objfile->sect_index_text == -1) 4079 objfile->sect_index_text = sect->index; 4080 4081 if (objfile->sect_index_rodata == -1) 4082 objfile->sect_index_rodata = sect->index; 4083 } 4084 else if (which == 2) 4085 { 4086 if (objfile->sect_index_data == -1) 4087 objfile->sect_index_data = sect->index; 4088 4089 if (objfile->sect_index_bss == -1) 4090 objfile->sect_index_bss = sect->index; 4091 } 4092 } 4093 4094 free_symfile_segment_data (data); 4095} 4096 4097void 4098_initialize_symfile (void) 4099{ 4100 struct cmd_list_element *c; 4101 4102 c = add_cmd ("symbol-file", class_files, symbol_file_command, _("\ 4103Load symbol table from executable file FILE.\n\ 4104The `file' command can also load symbol tables, as well as setting the file\n\ 4105to execute."), &cmdlist); 4106 set_cmd_completer (c, filename_completer); 4107 4108 c = add_cmd ("add-symbol-file", class_files, add_symbol_file_command, _("\ 4109Load symbols from FILE, assuming FILE has been dynamically loaded.\n\ 4110Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR> ...]\n\ 4111ADDR is the starting address of the file's text.\n\ 4112The optional arguments are section-name section-address pairs and\n\ 4113should be specified if the data and bss segments are not contiguous\n\ 4114with the text. SECT is a section name to be loaded at SECT_ADDR."), 4115 &cmdlist); 4116 set_cmd_completer (c, filename_completer); 4117 4118 c = add_cmd ("add-shared-symbol-files", class_files, 4119 add_shared_symbol_files_command, _("\ 4120Load the symbols from shared objects in the dynamic linker's link map."), 4121 &cmdlist); 4122 c = add_alias_cmd ("assf", "add-shared-symbol-files", class_files, 1, 4123 &cmdlist); 4124 4125 c = add_cmd ("load", class_files, load_command, _("\ 4126Dynamically load FILE into the running program, and record its symbols\n\ 4127for access from GDB.\n\ 4128A load OFFSET may also be given."), &cmdlist); 4129 set_cmd_completer (c, filename_completer); 4130 4131 add_setshow_boolean_cmd ("symbol-reloading", class_support, 4132 &symbol_reloading, _("\ 4133Set dynamic symbol table reloading multiple times in one run."), _("\ 4134Show dynamic symbol table reloading multiple times in one run."), NULL, 4135 NULL, 4136 show_symbol_reloading, 4137 &setlist, &showlist); 4138 4139 add_prefix_cmd ("overlay", class_support, overlay_command, 4140 _("Commands for debugging overlays."), &overlaylist, 4141 "overlay ", 0, &cmdlist); 4142 4143 add_com_alias ("ovly", "overlay", class_alias, 1); 4144 add_com_alias ("ov", "overlay", class_alias, 1); 4145 4146 add_cmd ("map-overlay", class_support, map_overlay_command, 4147 _("Assert that an overlay section is mapped."), &overlaylist); 4148 4149 add_cmd ("unmap-overlay", class_support, unmap_overlay_command, 4150 _("Assert that an overlay section is unmapped."), &overlaylist); 4151 4152 add_cmd ("list-overlays", class_support, list_overlays_command, 4153 _("List mappings of overlay sections."), &overlaylist); 4154 4155 add_cmd ("manual", class_support, overlay_manual_command, 4156 _("Enable overlay debugging."), &overlaylist); 4157 add_cmd ("off", class_support, overlay_off_command, 4158 _("Disable overlay debugging."), &overlaylist); 4159 add_cmd ("auto", class_support, overlay_auto_command, 4160 _("Enable automatic overlay debugging."), &overlaylist); 4161 add_cmd ("load-target", class_support, overlay_load_command, 4162 _("Read the overlay mapping state from the target."), &overlaylist); 4163 4164 /* Filename extension to source language lookup table: */ 4165 init_filename_language_table (); 4166 add_setshow_string_noescape_cmd ("extension-language", class_files, 4167 &ext_args, _("\ 4168Set mapping between filename extension and source language."), _("\ 4169Show mapping between filename extension and source language."), _("\ 4170Usage: set extension-language .foo bar"), 4171 set_ext_lang_command, 4172 show_ext_args, 4173 &setlist, &showlist); 4174 4175 add_info ("extensions", info_ext_lang_command, 4176 _("All filename extensions associated with a source language.")); 4177 4178 add_setshow_optional_filename_cmd ("debug-file-directory", class_support, 4179 &debug_file_directory, _("\ 4180Set the directory where separate debug symbols are searched for."), _("\ 4181Show the directory where separate debug symbols are searched for."), _("\ 4182Separate debug symbols are first searched for in the same\n\ 4183directory as the binary, then in the `" DEBUG_SUBDIRECTORY "' subdirectory,\n\ 4184and lastly at the path of the directory of the binary with\n\ 4185the global debug-file directory prepended."), 4186 NULL, 4187 show_debug_file_directory, 4188 &setlist, &showlist); 4189} 4190