symfile.c revision 225736
1/* Generic symbol file reading for the GNU debugger, GDB. 2 3 Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 4 1999, 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc. 5 6 Contributed by Cygnus Support, using pieces from other GDB modules. 7 8 This file is part of GDB. 9 10 This program is free software; you can redistribute it and/or modify 11 it under the terms of the GNU General Public License as published by 12 the Free Software Foundation; either version 2 of the License, or 13 (at your option) any later version. 14 15 This program is distributed in the hope that it will be useful, 16 but WITHOUT ANY WARRANTY; without even the implied warranty of 17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 GNU General Public License for more details. 19 20 You should have received a copy of the GNU General Public License 21 along with this program; if not, write to the Free Software 22 Foundation, Inc., 59 Temple Place - Suite 330, 23 Boston, MA 02111-1307, USA. */ 24 25#include "defs.h" 26#include "bfdlink.h" 27#include "symtab.h" 28#include "gdbtypes.h" 29#include "gdbcore.h" 30#include "frame.h" 31#include "target.h" 32#include "value.h" 33#include "symfile.h" 34#include "objfiles.h" 35#include "source.h" 36#include "gdbcmd.h" 37#include "breakpoint.h" 38#include "language.h" 39#include "complaints.h" 40#include "demangle.h" 41#include "inferior.h" /* for write_pc */ 42#include "filenames.h" /* for DOSish file names */ 43#include "gdb-stabs.h" 44#include "gdb_obstack.h" 45#include "completer.h" 46#include "bcache.h" 47#include "hashtab.h" 48#include "readline/readline.h" 49#include "gdb_assert.h" 50#include "block.h" 51 52#include <sys/types.h> 53#include <fcntl.h> 54#include "gdb_string.h" 55#include "gdb_stat.h" 56#include <ctype.h> 57#include <time.h> 58 59#ifndef O_BINARY 60#define O_BINARY 0 61#endif 62 63#ifdef HPUXHPPA 64 65/* Some HP-UX related globals to clear when a new "main" 66 symbol file is loaded. HP-specific. */ 67 68extern int hp_som_som_object_present; 69extern int hp_cxx_exception_support_initialized; 70#define RESET_HP_UX_GLOBALS() do {\ 71 hp_som_som_object_present = 0; /* indicates HP-compiled code */ \ 72 hp_cxx_exception_support_initialized = 0; /* must reinitialize exception stuff */ \ 73 } while (0) 74#endif 75 76int (*ui_load_progress_hook) (const char *section, unsigned long num); 77void (*show_load_progress) (const char *section, 78 unsigned long section_sent, 79 unsigned long section_size, 80 unsigned long total_sent, 81 unsigned long total_size); 82void (*pre_add_symbol_hook) (char *); 83void (*post_add_symbol_hook) (void); 84void (*target_new_objfile_hook) (struct objfile *); 85 86static void clear_symtab_users_cleanup (void *ignore); 87 88/* Global variables owned by this file */ 89int readnow_symbol_files; /* Read full symbols immediately */ 90 91/* External variables and functions referenced. */ 92 93extern void report_transfer_performance (unsigned long, time_t, time_t); 94 95/* Functions this file defines */ 96 97#if 0 98static int simple_read_overlay_region_table (void); 99static void simple_free_overlay_region_table (void); 100#endif 101 102static void set_initial_language (void); 103 104static void load_command (char *, int); 105 106static void symbol_file_add_main_1 (char *args, int from_tty, int flags); 107 108static void add_symbol_file_command (char *, int); 109 110static void add_shared_symbol_files_command (char *, int); 111 112static void reread_separate_symbols (struct objfile *objfile); 113 114static void cashier_psymtab (struct partial_symtab *); 115 116bfd *symfile_bfd_open (char *); 117 118int get_section_index (struct objfile *, char *); 119 120static void find_sym_fns (struct objfile *); 121 122static void decrement_reading_symtab (void *); 123 124static void overlay_invalidate_all (void); 125 126static int overlay_is_mapped (struct obj_section *); 127 128void list_overlays_command (char *, int); 129 130void map_overlay_command (char *, int); 131 132void unmap_overlay_command (char *, int); 133 134static void overlay_auto_command (char *, int); 135 136static void overlay_manual_command (char *, int); 137 138static void overlay_off_command (char *, int); 139 140static void overlay_load_command (char *, int); 141 142static void overlay_command (char *, int); 143 144static void simple_free_overlay_table (void); 145 146static void read_target_long_array (CORE_ADDR, unsigned int *, int); 147 148static int simple_read_overlay_table (void); 149 150static int simple_overlay_update_1 (struct obj_section *); 151 152static void add_filename_language (char *ext, enum language lang); 153 154static void set_ext_lang_command (char *args, int from_tty); 155 156static void info_ext_lang_command (char *args, int from_tty); 157 158static char *find_separate_debug_file (struct objfile *objfile); 159 160static void init_filename_language_table (void); 161 162void _initialize_symfile (void); 163 164/* List of all available sym_fns. On gdb startup, each object file reader 165 calls add_symtab_fns() to register information on each format it is 166 prepared to read. */ 167 168static struct sym_fns *symtab_fns = NULL; 169 170/* Flag for whether user will be reloading symbols multiple times. 171 Defaults to ON for VxWorks, otherwise OFF. */ 172 173#ifdef SYMBOL_RELOADING_DEFAULT 174int symbol_reloading = SYMBOL_RELOADING_DEFAULT; 175#else 176int symbol_reloading = 0; 177#endif 178 179/* If non-zero, shared library symbols will be added automatically 180 when the inferior is created, new libraries are loaded, or when 181 attaching to the inferior. This is almost always what users will 182 want to have happen; but for very large programs, the startup time 183 will be excessive, and so if this is a problem, the user can clear 184 this flag and then add the shared library symbols as needed. Note 185 that there is a potential for confusion, since if the shared 186 library symbols are not loaded, commands like "info fun" will *not* 187 report all the functions that are actually present. */ 188 189int auto_solib_add = 1; 190 191/* For systems that support it, a threshold size in megabytes. If 192 automatically adding a new library's symbol table to those already 193 known to the debugger would cause the total shared library symbol 194 size to exceed this threshhold, then the shlib's symbols are not 195 added. The threshold is ignored if the user explicitly asks for a 196 shlib to be added, such as when using the "sharedlibrary" 197 command. */ 198 199int auto_solib_limit; 200 201 202/* This compares two partial symbols by names, using strcmp_iw_ordered 203 for the comparison. */ 204 205static int 206compare_psymbols (const void *s1p, const void *s2p) 207{ 208 struct partial_symbol *const *s1 = s1p; 209 struct partial_symbol *const *s2 = s2p; 210 211 return strcmp_iw_ordered (SYMBOL_NATURAL_NAME (*s1), 212 SYMBOL_NATURAL_NAME (*s2)); 213} 214 215void 216sort_pst_symbols (struct partial_symtab *pst) 217{ 218 /* Sort the global list; don't sort the static list */ 219 220 qsort (pst->objfile->global_psymbols.list + pst->globals_offset, 221 pst->n_global_syms, sizeof (struct partial_symbol *), 222 compare_psymbols); 223} 224 225/* Make a null terminated copy of the string at PTR with SIZE characters in 226 the obstack pointed to by OBSTACKP . Returns the address of the copy. 227 Note that the string at PTR does not have to be null terminated, I.E. it 228 may be part of a larger string and we are only saving a substring. */ 229 230char * 231obsavestring (const char *ptr, int size, struct obstack *obstackp) 232{ 233 char *p = (char *) obstack_alloc (obstackp, size + 1); 234 /* Open-coded memcpy--saves function call time. These strings are usually 235 short. FIXME: Is this really still true with a compiler that can 236 inline memcpy? */ 237 { 238 const char *p1 = ptr; 239 char *p2 = p; 240 const char *end = ptr + size; 241 while (p1 != end) 242 *p2++ = *p1++; 243 } 244 p[size] = 0; 245 return p; 246} 247 248/* Concatenate strings S1, S2 and S3; return the new string. Space is found 249 in the obstack pointed to by OBSTACKP. */ 250 251char * 252obconcat (struct obstack *obstackp, const char *s1, const char *s2, 253 const char *s3) 254{ 255 int len = strlen (s1) + strlen (s2) + strlen (s3) + 1; 256 char *val = (char *) obstack_alloc (obstackp, len); 257 strcpy (val, s1); 258 strcat (val, s2); 259 strcat (val, s3); 260 return val; 261} 262 263/* True if we are nested inside psymtab_to_symtab. */ 264 265int currently_reading_symtab = 0; 266 267static void 268decrement_reading_symtab (void *dummy) 269{ 270 currently_reading_symtab--; 271} 272 273/* Get the symbol table that corresponds to a partial_symtab. 274 This is fast after the first time you do it. In fact, there 275 is an even faster macro PSYMTAB_TO_SYMTAB that does the fast 276 case inline. */ 277 278struct symtab * 279psymtab_to_symtab (struct partial_symtab *pst) 280{ 281 /* If it's been looked up before, return it. */ 282 if (pst->symtab) 283 return pst->symtab; 284 285 /* If it has not yet been read in, read it. */ 286 if (!pst->readin) 287 { 288 struct cleanup *back_to = make_cleanup (decrement_reading_symtab, NULL); 289 currently_reading_symtab++; 290 (*pst->read_symtab) (pst); 291 do_cleanups (back_to); 292 } 293 294 return pst->symtab; 295} 296 297/* Remember the lowest-addressed loadable section we've seen. 298 This function is called via bfd_map_over_sections. 299 300 In case of equal vmas, the section with the largest size becomes the 301 lowest-addressed loadable section. 302 303 If the vmas and sizes are equal, the last section is considered the 304 lowest-addressed loadable section. */ 305 306void 307find_lowest_section (bfd *abfd, asection *sect, void *obj) 308{ 309 asection **lowest = (asection **) obj; 310 311 if (0 == (bfd_get_section_flags (abfd, sect) & SEC_LOAD)) 312 return; 313 if (!*lowest) 314 *lowest = sect; /* First loadable section */ 315 else if (bfd_section_vma (abfd, *lowest) > bfd_section_vma (abfd, sect)) 316 *lowest = sect; /* A lower loadable section */ 317 else if (bfd_section_vma (abfd, *lowest) == bfd_section_vma (abfd, sect) 318 && (bfd_section_size (abfd, (*lowest)) 319 <= bfd_section_size (abfd, sect))) 320 *lowest = sect; 321} 322 323/* Create a new section_addr_info, with room for NUM_SECTIONS. */ 324 325struct section_addr_info * 326alloc_section_addr_info (size_t num_sections) 327{ 328 struct section_addr_info *sap; 329 size_t size; 330 331 size = (sizeof (struct section_addr_info) 332 + sizeof (struct other_sections) * (num_sections - 1)); 333 sap = (struct section_addr_info *) xmalloc (size); 334 memset (sap, 0, size); 335 sap->num_sections = num_sections; 336 337 return sap; 338} 339 340/* Build (allocate and populate) a section_addr_info struct from 341 an existing section table. */ 342 343extern struct section_addr_info * 344build_section_addr_info_from_section_table (const struct section_table *start, 345 const struct section_table *end) 346{ 347 struct section_addr_info *sap; 348 const struct section_table *stp; 349 int oidx; 350 351 sap = alloc_section_addr_info (end - start); 352 353 for (stp = start, oidx = 0; stp != end; stp++) 354 { 355 if (bfd_get_section_flags (stp->bfd, 356 stp->the_bfd_section) & (SEC_ALLOC | SEC_LOAD) 357 && oidx < end - start) 358 { 359 sap->other[oidx].addr = stp->addr; 360 sap->other[oidx].name 361 = xstrdup (bfd_section_name (stp->bfd, stp->the_bfd_section)); 362 sap->other[oidx].sectindex = stp->the_bfd_section->index; 363 oidx++; 364 } 365 } 366 367 return sap; 368} 369 370 371/* Free all memory allocated by build_section_addr_info_from_section_table. */ 372 373extern void 374free_section_addr_info (struct section_addr_info *sap) 375{ 376 int idx; 377 378 for (idx = 0; idx < sap->num_sections; idx++) 379 if (sap->other[idx].name) 380 xfree (sap->other[idx].name); 381 xfree (sap); 382} 383 384 385/* Initialize OBJFILE's sect_index_* members. */ 386static void 387init_objfile_sect_indices (struct objfile *objfile) 388{ 389 asection *sect; 390 int i; 391 392 sect = bfd_get_section_by_name (objfile->obfd, ".text"); 393 if (sect) 394 objfile->sect_index_text = sect->index; 395 396 sect = bfd_get_section_by_name (objfile->obfd, ".data"); 397 if (sect) 398 objfile->sect_index_data = sect->index; 399 400 sect = bfd_get_section_by_name (objfile->obfd, ".bss"); 401 if (sect) 402 objfile->sect_index_bss = sect->index; 403 404 sect = bfd_get_section_by_name (objfile->obfd, ".rodata"); 405 if (sect) 406 objfile->sect_index_rodata = sect->index; 407 408 /* This is where things get really weird... We MUST have valid 409 indices for the various sect_index_* members or gdb will abort. 410 So if for example, there is no ".text" section, we have to 411 accomodate that. Except when explicitly adding symbol files at 412 some address, section_offsets contains nothing but zeros, so it 413 doesn't matter which slot in section_offsets the individual 414 sect_index_* members index into. So if they are all zero, it is 415 safe to just point all the currently uninitialized indices to the 416 first slot. */ 417 418 for (i = 0; i < objfile->num_sections; i++) 419 { 420 if (ANOFFSET (objfile->section_offsets, i) != 0) 421 { 422 break; 423 } 424 } 425 if (i == objfile->num_sections) 426 { 427 if (objfile->sect_index_text == -1) 428 objfile->sect_index_text = 0; 429 if (objfile->sect_index_data == -1) 430 objfile->sect_index_data = 0; 431 if (objfile->sect_index_bss == -1) 432 objfile->sect_index_bss = 0; 433 if (objfile->sect_index_rodata == -1) 434 objfile->sect_index_rodata = 0; 435 } 436} 437 438 439/* Parse the user's idea of an offset for dynamic linking, into our idea 440 of how to represent it for fast symbol reading. This is the default 441 version of the sym_fns.sym_offsets function for symbol readers that 442 don't need to do anything special. It allocates a section_offsets table 443 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */ 444 445void 446default_symfile_offsets (struct objfile *objfile, 447 struct section_addr_info *addrs) 448{ 449 int i; 450 451 objfile->num_sections = bfd_count_sections (objfile->obfd); 452 objfile->section_offsets = (struct section_offsets *) 453 obstack_alloc (&objfile->objfile_obstack, 454 SIZEOF_N_SECTION_OFFSETS (objfile->num_sections)); 455 memset (objfile->section_offsets, 0, 456 SIZEOF_N_SECTION_OFFSETS (objfile->num_sections)); 457 458 /* Now calculate offsets for section that were specified by the 459 caller. */ 460 for (i = 0; i < addrs->num_sections && addrs->other[i].name; i++) 461 { 462 struct other_sections *osp ; 463 464 osp = &addrs->other[i] ; 465 if (osp->addr == 0) 466 continue; 467 468 /* Record all sections in offsets */ 469 /* The section_offsets in the objfile are here filled in using 470 the BFD index. */ 471 (objfile->section_offsets)->offsets[osp->sectindex] = osp->addr; 472 } 473 474 /* Remember the bfd indexes for the .text, .data, .bss and 475 .rodata sections. */ 476 init_objfile_sect_indices (objfile); 477} 478 479 480/* Process a symbol file, as either the main file or as a dynamically 481 loaded file. 482 483 OBJFILE is where the symbols are to be read from. 484 485 ADDRS is the list of section load addresses. If the user has given 486 an 'add-symbol-file' command, then this is the list of offsets and 487 addresses he or she provided as arguments to the command; or, if 488 we're handling a shared library, these are the actual addresses the 489 sections are loaded at, according to the inferior's dynamic linker 490 (as gleaned by GDB's shared library code). We convert each address 491 into an offset from the section VMA's as it appears in the object 492 file, and then call the file's sym_offsets function to convert this 493 into a format-specific offset table --- a `struct section_offsets'. 494 If ADDRS is non-zero, OFFSETS must be zero. 495 496 OFFSETS is a table of section offsets already in the right 497 format-specific representation. NUM_OFFSETS is the number of 498 elements present in OFFSETS->offsets. If OFFSETS is non-zero, we 499 assume this is the proper table the call to sym_offsets described 500 above would produce. Instead of calling sym_offsets, we just dump 501 it right into objfile->section_offsets. (When we're re-reading 502 symbols from an objfile, we don't have the original load address 503 list any more; all we have is the section offset table.) If 504 OFFSETS is non-zero, ADDRS must be zero. 505 506 MAINLINE is nonzero if this is the main symbol file, or zero if 507 it's an extra symbol file such as dynamically loaded code. 508 509 VERBO is nonzero if the caller has printed a verbose message about 510 the symbol reading (and complaints can be more terse about it). */ 511 512void 513syms_from_objfile (struct objfile *objfile, 514 struct section_addr_info *addrs, 515 struct section_offsets *offsets, 516 int num_offsets, 517 int mainline, 518 int verbo) 519{ 520 struct section_addr_info *local_addr = NULL; 521 struct cleanup *old_chain; 522 523 gdb_assert (! (addrs && offsets)); 524 525 init_entry_point_info (objfile); 526 find_sym_fns (objfile); 527 528 if (objfile->sf == NULL) 529 return; /* No symbols. */ 530 531 /* Make sure that partially constructed symbol tables will be cleaned up 532 if an error occurs during symbol reading. */ 533 old_chain = make_cleanup_free_objfile (objfile); 534 535 /* If ADDRS and OFFSETS are both NULL, put together a dummy address 536 list. We now establish the convention that an addr of zero means 537 no load address was specified. */ 538 if (! addrs && ! offsets) 539 { 540 local_addr 541 = alloc_section_addr_info (bfd_count_sections (objfile->obfd)); 542 make_cleanup (xfree, local_addr); 543 addrs = local_addr; 544 } 545 546 /* Now either addrs or offsets is non-zero. */ 547 548 if (mainline) 549 { 550 /* We will modify the main symbol table, make sure that all its users 551 will be cleaned up if an error occurs during symbol reading. */ 552 make_cleanup (clear_symtab_users_cleanup, 0 /*ignore*/); 553 554 /* Since no error yet, throw away the old symbol table. */ 555 556 if (symfile_objfile != NULL) 557 { 558 free_objfile (symfile_objfile); 559 symfile_objfile = NULL; 560 } 561 562 /* Currently we keep symbols from the add-symbol-file command. 563 If the user wants to get rid of them, they should do "symbol-file" 564 without arguments first. Not sure this is the best behavior 565 (PR 2207). */ 566 567 (*objfile->sf->sym_new_init) (objfile); 568 } 569 570 /* Convert addr into an offset rather than an absolute address. 571 We find the lowest address of a loaded segment in the objfile, 572 and assume that <addr> is where that got loaded. 573 574 We no longer warn if the lowest section is not a text segment (as 575 happens for the PA64 port. */ 576 if (!mainline && addrs && addrs->other[0].name) 577 { 578 asection *lower_sect; 579 asection *sect; 580 CORE_ADDR lower_offset; 581 int i; 582 583 /* Find lowest loadable section to be used as starting point for 584 continguous sections. FIXME!! won't work without call to find 585 .text first, but this assumes text is lowest section. */ 586 lower_sect = bfd_get_section_by_name (objfile->obfd, ".text"); 587 if (lower_sect == NULL) 588 bfd_map_over_sections (objfile->obfd, find_lowest_section, 589 &lower_sect); 590 if (lower_sect == NULL) 591 warning ("no loadable sections found in added symbol-file %s", 592 objfile->name); 593 else 594 if ((bfd_get_section_flags (objfile->obfd, lower_sect) & SEC_CODE) == 0) 595 warning ("Lowest section in %s is %s at %s", 596 objfile->name, 597 bfd_section_name (objfile->obfd, lower_sect), 598 paddr (bfd_section_vma (objfile->obfd, lower_sect))); 599 if (lower_sect != NULL) 600 lower_offset = bfd_section_vma (objfile->obfd, lower_sect); 601 else 602 lower_offset = 0; 603 604 /* Calculate offsets for the loadable sections. 605 FIXME! Sections must be in order of increasing loadable section 606 so that contiguous sections can use the lower-offset!!! 607 608 Adjust offsets if the segments are not contiguous. 609 If the section is contiguous, its offset should be set to 610 the offset of the highest loadable section lower than it 611 (the loadable section directly below it in memory). 612 this_offset = lower_offset = lower_addr - lower_orig_addr */ 613 614 for (i = 0; i < addrs->num_sections && addrs->other[i].name; i++) 615 { 616 if (addrs->other[i].addr != 0) 617 { 618 sect = bfd_get_section_by_name (objfile->obfd, 619 addrs->other[i].name); 620 if (sect) 621 { 622 addrs->other[i].addr 623 -= bfd_section_vma (objfile->obfd, sect); 624 lower_offset = addrs->other[i].addr; 625 /* This is the index used by BFD. */ 626 addrs->other[i].sectindex = sect->index ; 627 } 628 else 629 { 630 warning ("section %s not found in %s", 631 addrs->other[i].name, 632 objfile->name); 633 addrs->other[i].addr = 0; 634 } 635 } 636 else 637 addrs->other[i].addr = lower_offset; 638 } 639 } 640 641 /* Initialize symbol reading routines for this objfile, allow complaints to 642 appear for this new file, and record how verbose to be, then do the 643 initial symbol reading for this file. */ 644 645 (*objfile->sf->sym_init) (objfile); 646 clear_complaints (&symfile_complaints, 1, verbo); 647 648 if (addrs) 649 (*objfile->sf->sym_offsets) (objfile, addrs); 650 else 651 { 652 size_t size = SIZEOF_N_SECTION_OFFSETS (num_offsets); 653 654 /* Just copy in the offset table directly as given to us. */ 655 objfile->num_sections = num_offsets; 656 objfile->section_offsets 657 = ((struct section_offsets *) 658 obstack_alloc (&objfile->objfile_obstack, size)); 659 memcpy (objfile->section_offsets, offsets, size); 660 661 init_objfile_sect_indices (objfile); 662 } 663 664#ifndef DEPRECATED_IBM6000_TARGET 665 /* This is a SVR4/SunOS specific hack, I think. In any event, it 666 screws RS/6000. sym_offsets should be doing this sort of thing, 667 because it knows the mapping between bfd sections and 668 section_offsets. */ 669 /* This is a hack. As far as I can tell, section offsets are not 670 target dependent. They are all set to addr with a couple of 671 exceptions. The exceptions are sysvr4 shared libraries, whose 672 offsets are kept in solib structures anyway and rs6000 xcoff 673 which handles shared libraries in a completely unique way. 674 675 Section offsets are built similarly, except that they are built 676 by adding addr in all cases because there is no clear mapping 677 from section_offsets into actual sections. Note that solib.c 678 has a different algorithm for finding section offsets. 679 680 These should probably all be collapsed into some target 681 independent form of shared library support. FIXME. */ 682 683 if (addrs) 684 { 685 struct obj_section *s; 686 687 /* Map section offsets in "addr" back to the object's 688 sections by comparing the section names with bfd's 689 section names. Then adjust the section address by 690 the offset. */ /* for gdb/13815 */ 691 692 ALL_OBJFILE_OSECTIONS (objfile, s) 693 { 694 CORE_ADDR s_addr = 0; 695 int i; 696 697 for (i = 0; 698 !s_addr && i < addrs->num_sections && addrs->other[i].name; 699 i++) 700 if (strcmp (bfd_section_name (s->objfile->obfd, 701 s->the_bfd_section), 702 addrs->other[i].name) == 0) 703 s_addr = addrs->other[i].addr; /* end added for gdb/13815 */ 704 705 s->addr -= s->offset; 706 s->addr += s_addr; 707 s->endaddr -= s->offset; 708 s->endaddr += s_addr; 709 s->offset += s_addr; 710 } 711 } 712#endif /* not DEPRECATED_IBM6000_TARGET */ 713 714 (*objfile->sf->sym_read) (objfile, mainline); 715 716 /* Don't allow char * to have a typename (else would get caddr_t). 717 Ditto void *. FIXME: Check whether this is now done by all the 718 symbol readers themselves (many of them now do), and if so remove 719 it from here. */ 720 721 TYPE_NAME (lookup_pointer_type (builtin_type_char)) = 0; 722 TYPE_NAME (lookup_pointer_type (builtin_type_void)) = 0; 723 724 /* Mark the objfile has having had initial symbol read attempted. Note 725 that this does not mean we found any symbols... */ 726 727 objfile->flags |= OBJF_SYMS; 728 729 /* Discard cleanups as symbol reading was successful. */ 730 731 discard_cleanups (old_chain); 732} 733 734/* Perform required actions after either reading in the initial 735 symbols for a new objfile, or mapping in the symbols from a reusable 736 objfile. */ 737 738void 739new_symfile_objfile (struct objfile *objfile, int mainline, int verbo) 740{ 741 742 /* If this is the main symbol file we have to clean up all users of the 743 old main symbol file. Otherwise it is sufficient to fixup all the 744 breakpoints that may have been redefined by this symbol file. */ 745 if (mainline) 746 { 747 /* OK, make it the "real" symbol file. */ 748 symfile_objfile = objfile; 749 750 clear_symtab_users (); 751 } 752 else 753 { 754 breakpoint_re_set (); 755 } 756 757 /* We're done reading the symbol file; finish off complaints. */ 758 clear_complaints (&symfile_complaints, 0, verbo); 759} 760 761/* Process a symbol file, as either the main file or as a dynamically 762 loaded file. 763 764 NAME is the file name (which will be tilde-expanded and made 765 absolute herein) (but we don't free or modify NAME itself). 766 767 FROM_TTY says how verbose to be. 768 769 MAINLINE specifies whether this is the main symbol file, or whether 770 it's an extra symbol file such as dynamically loaded code. 771 772 ADDRS, OFFSETS, and NUM_OFFSETS are as described for 773 syms_from_objfile, above. ADDRS is ignored when MAINLINE is 774 non-zero. 775 776 Upon success, returns a pointer to the objfile that was added. 777 Upon failure, jumps back to command level (never returns). */ 778static struct objfile * 779symbol_file_add_with_addrs_or_offsets (char *name, int from_tty, 780 struct section_addr_info *addrs, 781 struct section_offsets *offsets, 782 int num_offsets, 783 int mainline, int flags) 784{ 785 struct objfile *objfile; 786 struct partial_symtab *psymtab; 787 char *debugfile; 788 bfd *abfd; 789 struct section_addr_info *orig_addrs; 790 struct cleanup *my_cleanups; 791 792 /* Open a bfd for the file, and give user a chance to burp if we'd be 793 interactively wiping out any existing symbols. */ 794 795 abfd = symfile_bfd_open (name); 796 797 if ((have_full_symbols () || have_partial_symbols ()) 798 && mainline 799 && from_tty 800 && !query ("Load new symbol table from \"%s\"? ", name)) 801 error ("Not confirmed."); 802 803 objfile = allocate_objfile (abfd, flags); 804 805 orig_addrs = alloc_section_addr_info (bfd_count_sections (abfd)); 806 my_cleanups = make_cleanup (xfree, orig_addrs); 807 if (addrs) 808 { 809 int i; 810 orig_addrs->num_sections = addrs->num_sections; 811 for (i = 0; i < addrs->num_sections; i++) 812 orig_addrs->other[i] = addrs->other[i]; 813 } 814 815 /* We either created a new mapped symbol table, mapped an existing 816 symbol table file which has not had initial symbol reading 817 performed, or need to read an unmapped symbol table. */ 818 if (from_tty || info_verbose) 819 { 820 if (pre_add_symbol_hook) 821 pre_add_symbol_hook (name); 822 else 823 { 824 printf_unfiltered ("Reading symbols from %s...", name); 825 wrap_here (""); 826 gdb_flush (gdb_stdout); 827 } 828 } 829 syms_from_objfile (objfile, addrs, offsets, num_offsets, 830 mainline, from_tty); 831 832 /* We now have at least a partial symbol table. Check to see if the 833 user requested that all symbols be read on initial access via either 834 the gdb startup command line or on a per symbol file basis. Expand 835 all partial symbol tables for this objfile if so. */ 836 837 if ((flags & OBJF_READNOW) || readnow_symbol_files) 838 { 839 if (from_tty || info_verbose) 840 { 841 printf_unfiltered ("expanding to full symbols..."); 842 wrap_here (""); 843 gdb_flush (gdb_stdout); 844 } 845 846 for (psymtab = objfile->psymtabs; 847 psymtab != NULL; 848 psymtab = psymtab->next) 849 { 850 psymtab_to_symtab (psymtab); 851 } 852 } 853 854 debugfile = find_separate_debug_file (objfile); 855 if (debugfile) 856 { 857 if (addrs != NULL) 858 { 859 objfile->separate_debug_objfile 860 = symbol_file_add (debugfile, from_tty, orig_addrs, 0, flags); 861 } 862 else 863 { 864 objfile->separate_debug_objfile 865 = symbol_file_add (debugfile, from_tty, NULL, 0, flags); 866 } 867 objfile->separate_debug_objfile->separate_debug_objfile_backlink 868 = objfile; 869 870 /* Put the separate debug object before the normal one, this is so that 871 usage of the ALL_OBJFILES_SAFE macro will stay safe. */ 872 put_objfile_before (objfile->separate_debug_objfile, objfile); 873 874 xfree (debugfile); 875 } 876 877 if (!have_partial_symbols () && !have_full_symbols ()) 878 { 879 wrap_here (""); 880 printf_unfiltered ("(no debugging symbols found)..."); 881 wrap_here (""); 882 } 883 884 if (from_tty || info_verbose) 885 { 886 if (post_add_symbol_hook) 887 post_add_symbol_hook (); 888 else 889 { 890 printf_unfiltered ("done.\n"); 891 } 892 } 893 894 /* We print some messages regardless of whether 'from_tty || 895 info_verbose' is true, so make sure they go out at the right 896 time. */ 897 gdb_flush (gdb_stdout); 898 899 do_cleanups (my_cleanups); 900 901 if (objfile->sf == NULL) 902 return objfile; /* No symbols. */ 903 904 new_symfile_objfile (objfile, mainline, from_tty); 905 906 if (target_new_objfile_hook) 907 target_new_objfile_hook (objfile); 908 909 return (objfile); 910} 911 912 913/* Process a symbol file, as either the main file or as a dynamically 914 loaded file. See symbol_file_add_with_addrs_or_offsets's comments 915 for details. */ 916struct objfile * 917symbol_file_add (char *name, int from_tty, struct section_addr_info *addrs, 918 int mainline, int flags) 919{ 920 return symbol_file_add_with_addrs_or_offsets (name, from_tty, addrs, 0, 0, 921 mainline, flags); 922} 923 924 925/* Call symbol_file_add() with default values and update whatever is 926 affected by the loading of a new main(). 927 Used when the file is supplied in the gdb command line 928 and by some targets with special loading requirements. 929 The auxiliary function, symbol_file_add_main_1(), has the flags 930 argument for the switches that can only be specified in the symbol_file 931 command itself. */ 932 933void 934symbol_file_add_main (char *args, int from_tty) 935{ 936 symbol_file_add_main_1 (args, from_tty, 0); 937} 938 939static void 940symbol_file_add_main_1 (char *args, int from_tty, int flags) 941{ 942 symbol_file_add (args, from_tty, NULL, 1, flags); 943 944#ifdef HPUXHPPA 945 RESET_HP_UX_GLOBALS (); 946#endif 947 948 /* Getting new symbols may change our opinion about 949 what is frameless. */ 950 reinit_frame_cache (); 951 952 set_initial_language (); 953} 954 955void 956symbol_file_clear (int from_tty) 957{ 958 if ((have_full_symbols () || have_partial_symbols ()) 959 && from_tty 960 && !query ("Discard symbol table from `%s'? ", 961 symfile_objfile->name)) 962 error ("Not confirmed."); 963 free_all_objfiles (); 964 965 /* solib descriptors may have handles to objfiles. Since their 966 storage has just been released, we'd better wipe the solib 967 descriptors as well. 968 */ 969#if defined(SOLIB_RESTART) 970 SOLIB_RESTART (); 971#endif 972 973 symfile_objfile = NULL; 974 if (from_tty) 975 printf_unfiltered ("No symbol file now.\n"); 976#ifdef HPUXHPPA 977 RESET_HP_UX_GLOBALS (); 978#endif 979} 980 981static char * 982get_debug_link_info (struct objfile *objfile, unsigned long *crc32_out) 983{ 984 asection *sect; 985 bfd_size_type debuglink_size; 986 unsigned long crc32; 987 char *contents; 988 int crc_offset; 989 unsigned char *p; 990 991 sect = bfd_get_section_by_name (objfile->obfd, ".gnu_debuglink"); 992 993 if (sect == NULL) 994 return NULL; 995 996 debuglink_size = bfd_section_size (objfile->obfd, sect); 997 998 contents = xmalloc (debuglink_size); 999 bfd_get_section_contents (objfile->obfd, sect, contents, 1000 (file_ptr)0, (bfd_size_type)debuglink_size); 1001 1002 /* Crc value is stored after the filename, aligned up to 4 bytes. */ 1003 crc_offset = strlen (contents) + 1; 1004 crc_offset = (crc_offset + 3) & ~3; 1005 1006 crc32 = bfd_get_32 (objfile->obfd, (bfd_byte *) (contents + crc_offset)); 1007 1008 *crc32_out = crc32; 1009 return contents; 1010} 1011 1012static int 1013separate_debug_file_exists (const char *name, unsigned long crc) 1014{ 1015 unsigned long file_crc = 0; 1016 int fd; 1017 char buffer[8*1024]; 1018 int count; 1019 1020 fd = open (name, O_RDONLY | O_BINARY); 1021 if (fd < 0) 1022 return 0; 1023 1024 while ((count = read (fd, buffer, sizeof (buffer))) > 0) 1025 file_crc = gnu_debuglink_crc32 (file_crc, buffer, count); 1026 1027 close (fd); 1028 1029 return crc == file_crc; 1030} 1031 1032static char *debug_file_directory = NULL; 1033 1034#if ! defined (DEBUG_SUBDIRECTORY) 1035#define DEBUG_SUBDIRECTORY ".debug" 1036#endif 1037 1038static char * 1039find_separate_debug_file (struct objfile *objfile) 1040{ 1041 asection *sect; 1042 char *basename; 1043 char *dir; 1044 char *debugfile; 1045 char *name_copy; 1046 bfd_size_type debuglink_size; 1047 unsigned long crc32; 1048 int i; 1049 1050 basename = get_debug_link_info (objfile, &crc32); 1051 1052 if (basename == NULL) 1053 return NULL; 1054 1055 dir = xstrdup (objfile->name); 1056 1057 /* Strip off the final filename part, leaving the directory name, 1058 followed by a slash. Objfile names should always be absolute and 1059 tilde-expanded, so there should always be a slash in there 1060 somewhere. */ 1061 for (i = strlen(dir) - 1; i >= 0; i--) 1062 { 1063 if (IS_DIR_SEPARATOR (dir[i])) 1064 break; 1065 } 1066 gdb_assert (i >= 0 && IS_DIR_SEPARATOR (dir[i])); 1067 dir[i+1] = '\0'; 1068 1069 debugfile = alloca (strlen (debug_file_directory) + 1 1070 + strlen (dir) 1071 + strlen (DEBUG_SUBDIRECTORY) 1072 + strlen ("/") 1073 + strlen (basename) 1074 + 1); 1075 1076 /* First try in the same directory as the original file. */ 1077 strcpy (debugfile, dir); 1078 strcat (debugfile, basename); 1079 1080 if (separate_debug_file_exists (debugfile, crc32)) 1081 { 1082 xfree (basename); 1083 xfree (dir); 1084 return xstrdup (debugfile); 1085 } 1086 1087 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */ 1088 strcpy (debugfile, dir); 1089 strcat (debugfile, DEBUG_SUBDIRECTORY); 1090 strcat (debugfile, "/"); 1091 strcat (debugfile, basename); 1092 1093 if (separate_debug_file_exists (debugfile, crc32)) 1094 { 1095 xfree (basename); 1096 xfree (dir); 1097 return xstrdup (debugfile); 1098 } 1099 1100 /* Then try in the global debugfile directory. */ 1101 strcpy (debugfile, debug_file_directory); 1102 strcat (debugfile, "/"); 1103 strcat (debugfile, dir); 1104 strcat (debugfile, basename); 1105 1106 if (separate_debug_file_exists (debugfile, crc32)) 1107 { 1108 xfree (basename); 1109 xfree (dir); 1110 return xstrdup (debugfile); 1111 } 1112 1113 xfree (basename); 1114 xfree (dir); 1115 return NULL; 1116} 1117 1118 1119/* This is the symbol-file command. Read the file, analyze its 1120 symbols, and add a struct symtab to a symtab list. The syntax of 1121 the command is rather bizarre--(1) buildargv implements various 1122 quoting conventions which are undocumented and have little or 1123 nothing in common with the way things are quoted (or not quoted) 1124 elsewhere in GDB, (2) options are used, which are not generally 1125 used in GDB (perhaps "set mapped on", "set readnow on" would be 1126 better), (3) the order of options matters, which is contrary to GNU 1127 conventions (because it is confusing and inconvenient). */ 1128/* Note: ezannoni 2000-04-17. This function used to have support for 1129 rombug (see remote-os9k.c). It consisted of a call to target_link() 1130 (target.c) to get the address of the text segment from the target, 1131 and pass that to symbol_file_add(). This is no longer supported. */ 1132 1133void 1134symbol_file_command (char *args, int from_tty) 1135{ 1136 char **argv; 1137 char *name = NULL; 1138 struct cleanup *cleanups; 1139 int flags = OBJF_USERLOADED; 1140 1141 dont_repeat (); 1142 1143 if (args == NULL) 1144 { 1145 symbol_file_clear (from_tty); 1146 } 1147 else 1148 { 1149 if ((argv = buildargv (args)) == NULL) 1150 { 1151 nomem (0); 1152 } 1153 cleanups = make_cleanup_freeargv (argv); 1154 while (*argv != NULL) 1155 { 1156 if (strcmp (*argv, "-readnow") == 0) 1157 flags |= OBJF_READNOW; 1158 else if (**argv == '-') 1159 error ("unknown option `%s'", *argv); 1160 else 1161 { 1162 name = *argv; 1163 1164 symbol_file_add_main_1 (name, from_tty, flags); 1165 } 1166 argv++; 1167 } 1168 1169 if (name == NULL) 1170 { 1171 error ("no symbol file name was specified"); 1172 } 1173 do_cleanups (cleanups); 1174 } 1175} 1176 1177/* Set the initial language. 1178 1179 A better solution would be to record the language in the psymtab when reading 1180 partial symbols, and then use it (if known) to set the language. This would 1181 be a win for formats that encode the language in an easily discoverable place, 1182 such as DWARF. For stabs, we can jump through hoops looking for specially 1183 named symbols or try to intuit the language from the specific type of stabs 1184 we find, but we can't do that until later when we read in full symbols. 1185 FIXME. */ 1186 1187static void 1188set_initial_language (void) 1189{ 1190 struct partial_symtab *pst; 1191 enum language lang = language_unknown; 1192 1193 pst = find_main_psymtab (); 1194 if (pst != NULL) 1195 { 1196 if (pst->filename != NULL) 1197 { 1198 lang = deduce_language_from_filename (pst->filename); 1199 } 1200 if (lang == language_unknown) 1201 { 1202 /* Make C the default language */ 1203 lang = language_c; 1204 } 1205 set_language (lang); 1206 expected_language = current_language; /* Don't warn the user */ 1207 } 1208} 1209 1210/* Open file specified by NAME and hand it off to BFD for preliminary 1211 analysis. Result is a newly initialized bfd *, which includes a newly 1212 malloc'd` copy of NAME (tilde-expanded and made absolute). 1213 In case of trouble, error() is called. */ 1214 1215bfd * 1216symfile_bfd_open (char *name) 1217{ 1218 bfd *sym_bfd; 1219 int desc; 1220 char *absolute_name; 1221 1222 1223 1224 name = tilde_expand (name); /* Returns 1st new malloc'd copy */ 1225 1226 /* Look down path for it, allocate 2nd new malloc'd copy. */ 1227 desc = openp (getenv ("PATH"), 1, name, O_RDONLY | O_BINARY, 0, &absolute_name); 1228#if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__) 1229 if (desc < 0) 1230 { 1231 char *exename = alloca (strlen (name) + 5); 1232 strcat (strcpy (exename, name), ".exe"); 1233 desc = openp (getenv ("PATH"), 1, exename, O_RDONLY | O_BINARY, 1234 0, &absolute_name); 1235 } 1236#endif 1237 if (desc < 0) 1238 { 1239 make_cleanup (xfree, name); 1240 perror_with_name (name); 1241 } 1242 xfree (name); /* Free 1st new malloc'd copy */ 1243 name = absolute_name; /* Keep 2nd malloc'd copy in bfd */ 1244 /* It'll be freed in free_objfile(). */ 1245 1246 sym_bfd = bfd_fdopenr (name, gnutarget, desc); 1247 if (!sym_bfd) 1248 { 1249 close (desc); 1250 make_cleanup (xfree, name); 1251 error ("\"%s\": can't open to read symbols: %s.", name, 1252 bfd_errmsg (bfd_get_error ())); 1253 } 1254 bfd_set_cacheable (sym_bfd, 1); 1255 1256 if (!bfd_check_format (sym_bfd, bfd_object)) 1257 { 1258 /* FIXME: should be checking for errors from bfd_close (for one thing, 1259 on error it does not free all the storage associated with the 1260 bfd). */ 1261 bfd_close (sym_bfd); /* This also closes desc */ 1262 make_cleanup (xfree, name); 1263 error ("\"%s\": can't read symbols: %s.", name, 1264 bfd_errmsg (bfd_get_error ())); 1265 } 1266 return (sym_bfd); 1267} 1268 1269/* Return the section index for the given section name. Return -1 if 1270 the section was not found. */ 1271int 1272get_section_index (struct objfile *objfile, char *section_name) 1273{ 1274 asection *sect = bfd_get_section_by_name (objfile->obfd, section_name); 1275 if (sect) 1276 return sect->index; 1277 else 1278 return -1; 1279} 1280 1281/* Link a new symtab_fns into the global symtab_fns list. Called on gdb 1282 startup by the _initialize routine in each object file format reader, 1283 to register information about each format the the reader is prepared 1284 to handle. */ 1285 1286void 1287add_symtab_fns (struct sym_fns *sf) 1288{ 1289 sf->next = symtab_fns; 1290 symtab_fns = sf; 1291} 1292 1293 1294/* Initialize to read symbols from the symbol file sym_bfd. It either 1295 returns or calls error(). The result is an initialized struct sym_fns 1296 in the objfile structure, that contains cached information about the 1297 symbol file. */ 1298 1299static void 1300find_sym_fns (struct objfile *objfile) 1301{ 1302 struct sym_fns *sf; 1303 enum bfd_flavour our_flavour = bfd_get_flavour (objfile->obfd); 1304 char *our_target = bfd_get_target (objfile->obfd); 1305 1306 if (our_flavour == bfd_target_srec_flavour 1307 || our_flavour == bfd_target_ihex_flavour 1308 || our_flavour == bfd_target_tekhex_flavour) 1309 return; /* No symbols. */ 1310 1311 for (sf = symtab_fns; sf != NULL; sf = sf->next) 1312 { 1313 if (our_flavour == sf->sym_flavour) 1314 { 1315 objfile->sf = sf; 1316 return; 1317 } 1318 } 1319 error ("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown.", 1320 bfd_get_target (objfile->obfd)); 1321} 1322 1323/* This function runs the load command of our current target. */ 1324 1325static void 1326load_command (char *arg, int from_tty) 1327{ 1328 if (arg == NULL) 1329 arg = get_exec_file (1); 1330 target_load (arg, from_tty); 1331 1332 /* After re-loading the executable, we don't really know which 1333 overlays are mapped any more. */ 1334 overlay_cache_invalid = 1; 1335} 1336 1337/* This version of "load" should be usable for any target. Currently 1338 it is just used for remote targets, not inftarg.c or core files, 1339 on the theory that only in that case is it useful. 1340 1341 Avoiding xmodem and the like seems like a win (a) because we don't have 1342 to worry about finding it, and (b) On VMS, fork() is very slow and so 1343 we don't want to run a subprocess. On the other hand, I'm not sure how 1344 performance compares. */ 1345 1346static int download_write_size = 512; 1347static int validate_download = 0; 1348 1349/* Callback service function for generic_load (bfd_map_over_sections). */ 1350 1351static void 1352add_section_size_callback (bfd *abfd, asection *asec, void *data) 1353{ 1354 bfd_size_type *sum = data; 1355 1356 *sum += bfd_get_section_size (asec); 1357} 1358 1359/* Opaque data for load_section_callback. */ 1360struct load_section_data { 1361 unsigned long load_offset; 1362 unsigned long write_count; 1363 unsigned long data_count; 1364 bfd_size_type total_size; 1365}; 1366 1367/* Callback service function for generic_load (bfd_map_over_sections). */ 1368 1369static void 1370load_section_callback (bfd *abfd, asection *asec, void *data) 1371{ 1372 struct load_section_data *args = data; 1373 1374 if (bfd_get_section_flags (abfd, asec) & SEC_LOAD) 1375 { 1376 bfd_size_type size = bfd_get_section_size (asec); 1377 if (size > 0) 1378 { 1379 char *buffer; 1380 struct cleanup *old_chain; 1381 CORE_ADDR lma = bfd_section_lma (abfd, asec) + args->load_offset; 1382 bfd_size_type block_size; 1383 int err; 1384 const char *sect_name = bfd_get_section_name (abfd, asec); 1385 bfd_size_type sent; 1386 1387 if (download_write_size > 0 && size > download_write_size) 1388 block_size = download_write_size; 1389 else 1390 block_size = size; 1391 1392 buffer = xmalloc (size); 1393 old_chain = make_cleanup (xfree, buffer); 1394 1395 /* Is this really necessary? I guess it gives the user something 1396 to look at during a long download. */ 1397 ui_out_message (uiout, 0, "Loading section %s, size 0x%s lma 0x%s\n", 1398 sect_name, paddr_nz (size), paddr_nz (lma)); 1399 1400 bfd_get_section_contents (abfd, asec, buffer, 0, size); 1401 1402 sent = 0; 1403 do 1404 { 1405 int len; 1406 bfd_size_type this_transfer = size - sent; 1407 1408 if (this_transfer >= block_size) 1409 this_transfer = block_size; 1410 len = target_write_memory_partial (lma, buffer, 1411 this_transfer, &err); 1412 if (err) 1413 break; 1414 if (validate_download) 1415 { 1416 /* Broken memories and broken monitors manifest 1417 themselves here when bring new computers to 1418 life. This doubles already slow downloads. */ 1419 /* NOTE: cagney/1999-10-18: A more efficient 1420 implementation might add a verify_memory() 1421 method to the target vector and then use 1422 that. remote.c could implement that method 1423 using the ``qCRC'' packet. */ 1424 char *check = xmalloc (len); 1425 struct cleanup *verify_cleanups = 1426 make_cleanup (xfree, check); 1427 1428 if (target_read_memory (lma, check, len) != 0) 1429 error ("Download verify read failed at 0x%s", 1430 paddr (lma)); 1431 if (memcmp (buffer, check, len) != 0) 1432 error ("Download verify compare failed at 0x%s", 1433 paddr (lma)); 1434 do_cleanups (verify_cleanups); 1435 } 1436 args->data_count += len; 1437 lma += len; 1438 buffer += len; 1439 args->write_count += 1; 1440 sent += len; 1441 if (quit_flag 1442 || (ui_load_progress_hook != NULL 1443 && ui_load_progress_hook (sect_name, sent))) 1444 error ("Canceled the download"); 1445 1446 if (show_load_progress != NULL) 1447 show_load_progress (sect_name, sent, size, 1448 args->data_count, args->total_size); 1449 } 1450 while (sent < size); 1451 1452 if (err != 0) 1453 error ("Memory access error while loading section %s.", sect_name); 1454 1455 do_cleanups (old_chain); 1456 } 1457 } 1458} 1459 1460void 1461generic_load (char *args, int from_tty) 1462{ 1463 asection *s; 1464 bfd *loadfile_bfd; 1465 time_t start_time, end_time; /* Start and end times of download */ 1466 char *filename; 1467 struct cleanup *old_cleanups; 1468 char *offptr; 1469 struct load_section_data cbdata; 1470 CORE_ADDR entry; 1471 1472 cbdata.load_offset = 0; /* Offset to add to vma for each section. */ 1473 cbdata.write_count = 0; /* Number of writes needed. */ 1474 cbdata.data_count = 0; /* Number of bytes written to target memory. */ 1475 cbdata.total_size = 0; /* Total size of all bfd sectors. */ 1476 1477 /* Parse the input argument - the user can specify a load offset as 1478 a second argument. */ 1479 filename = xmalloc (strlen (args) + 1); 1480 old_cleanups = make_cleanup (xfree, filename); 1481 strcpy (filename, args); 1482 offptr = strchr (filename, ' '); 1483 if (offptr != NULL) 1484 { 1485 char *endptr; 1486 1487 cbdata.load_offset = strtoul (offptr, &endptr, 0); 1488 if (offptr == endptr) 1489 error ("Invalid download offset:%s\n", offptr); 1490 *offptr = '\0'; 1491 } 1492 else 1493 cbdata.load_offset = 0; 1494 1495 /* Open the file for loading. */ 1496 loadfile_bfd = bfd_openr (filename, gnutarget); 1497 if (loadfile_bfd == NULL) 1498 { 1499 perror_with_name (filename); 1500 return; 1501 } 1502 1503 /* FIXME: should be checking for errors from bfd_close (for one thing, 1504 on error it does not free all the storage associated with the 1505 bfd). */ 1506 make_cleanup_bfd_close (loadfile_bfd); 1507 1508 if (!bfd_check_format (loadfile_bfd, bfd_object)) 1509 { 1510 error ("\"%s\" is not an object file: %s", filename, 1511 bfd_errmsg (bfd_get_error ())); 1512 } 1513 1514 bfd_map_over_sections (loadfile_bfd, add_section_size_callback, 1515 (void *) &cbdata.total_size); 1516 1517 start_time = time (NULL); 1518 1519 bfd_map_over_sections (loadfile_bfd, load_section_callback, &cbdata); 1520 1521 end_time = time (NULL); 1522 1523 entry = bfd_get_start_address (loadfile_bfd); 1524 ui_out_text (uiout, "Start address "); 1525 ui_out_field_fmt (uiout, "address", "0x%s", paddr_nz (entry)); 1526 ui_out_text (uiout, ", load size "); 1527 ui_out_field_fmt (uiout, "load-size", "%lu", cbdata.data_count); 1528 ui_out_text (uiout, "\n"); 1529 /* We were doing this in remote-mips.c, I suspect it is right 1530 for other targets too. */ 1531 write_pc (entry); 1532 1533 /* FIXME: are we supposed to call symbol_file_add or not? According 1534 to a comment from remote-mips.c (where a call to symbol_file_add 1535 was commented out), making the call confuses GDB if more than one 1536 file is loaded in. Some targets do (e.g., remote-vx.c) but 1537 others don't (or didn't - perhaphs they have all been deleted). */ 1538 1539 print_transfer_performance (gdb_stdout, cbdata.data_count, 1540 cbdata.write_count, end_time - start_time); 1541 1542 do_cleanups (old_cleanups); 1543} 1544 1545/* Report how fast the transfer went. */ 1546 1547/* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being 1548 replaced by print_transfer_performance (with a very different 1549 function signature). */ 1550 1551void 1552report_transfer_performance (unsigned long data_count, time_t start_time, 1553 time_t end_time) 1554{ 1555 print_transfer_performance (gdb_stdout, data_count, 1556 end_time - start_time, 0); 1557} 1558 1559void 1560print_transfer_performance (struct ui_file *stream, 1561 unsigned long data_count, 1562 unsigned long write_count, 1563 unsigned long time_count) 1564{ 1565 ui_out_text (uiout, "Transfer rate: "); 1566 if (time_count > 0) 1567 { 1568 ui_out_field_fmt (uiout, "transfer-rate", "%lu", 1569 (data_count * 8) / time_count); 1570 ui_out_text (uiout, " bits/sec"); 1571 } 1572 else 1573 { 1574 ui_out_field_fmt (uiout, "transferred-bits", "%lu", (data_count * 8)); 1575 ui_out_text (uiout, " bits in <1 sec"); 1576 } 1577 if (write_count > 0) 1578 { 1579 ui_out_text (uiout, ", "); 1580 ui_out_field_fmt (uiout, "write-rate", "%lu", data_count / write_count); 1581 ui_out_text (uiout, " bytes/write"); 1582 } 1583 ui_out_text (uiout, ".\n"); 1584} 1585 1586/* This function allows the addition of incrementally linked object files. 1587 It does not modify any state in the target, only in the debugger. */ 1588/* Note: ezannoni 2000-04-13 This function/command used to have a 1589 special case syntax for the rombug target (Rombug is the boot 1590 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the 1591 rombug case, the user doesn't need to supply a text address, 1592 instead a call to target_link() (in target.c) would supply the 1593 value to use. We are now discontinuing this type of ad hoc syntax. */ 1594 1595static void 1596add_symbol_file_command (char *args, int from_tty) 1597{ 1598 char *filename = NULL; 1599 int flags = OBJF_USERLOADED; 1600 char *arg; 1601 int expecting_option = 0; 1602 int section_index = 0; 1603 int argcnt = 0; 1604 int sec_num = 0; 1605 int i; 1606 int expecting_sec_name = 0; 1607 int expecting_sec_addr = 0; 1608 1609 struct sect_opt 1610 { 1611 char *name; 1612 char *value; 1613 }; 1614 1615 struct section_addr_info *section_addrs; 1616 struct sect_opt *sect_opts = NULL; 1617 size_t num_sect_opts = 0; 1618 struct cleanup *my_cleanups = make_cleanup (null_cleanup, NULL); 1619 1620 num_sect_opts = 16; 1621 sect_opts = (struct sect_opt *) xmalloc (num_sect_opts 1622 * sizeof (struct sect_opt)); 1623 1624 dont_repeat (); 1625 1626 if (args == NULL) 1627 error ("add-symbol-file takes a file name and an address"); 1628 1629 /* Make a copy of the string that we can safely write into. */ 1630 args = xstrdup (args); 1631 1632 while (*args != '\000') 1633 { 1634 /* Any leading spaces? */ 1635 while (isspace (*args)) 1636 args++; 1637 1638 /* Point arg to the beginning of the argument. */ 1639 arg = args; 1640 1641 /* Move args pointer over the argument. */ 1642 while ((*args != '\000') && !isspace (*args)) 1643 args++; 1644 1645 /* If there are more arguments, terminate arg and 1646 proceed past it. */ 1647 if (*args != '\000') 1648 *args++ = '\000'; 1649 1650 /* Now process the argument. */ 1651 if (argcnt == 0) 1652 { 1653 /* The first argument is the file name. */ 1654 filename = tilde_expand (arg); 1655 make_cleanup (xfree, filename); 1656 } 1657 else 1658 if (argcnt == 1) 1659 { 1660 /* The second argument is always the text address at which 1661 to load the program. */ 1662 sect_opts[section_index].name = ".text"; 1663 sect_opts[section_index].value = arg; 1664 if (++section_index > num_sect_opts) 1665 { 1666 num_sect_opts *= 2; 1667 sect_opts = ((struct sect_opt *) 1668 xrealloc (sect_opts, 1669 num_sect_opts 1670 * sizeof (struct sect_opt))); 1671 } 1672 } 1673 else 1674 { 1675 /* It's an option (starting with '-') or it's an argument 1676 to an option */ 1677 1678 if (*arg == '-') 1679 { 1680 if (strcmp (arg, "-readnow") == 0) 1681 flags |= OBJF_READNOW; 1682 else if (strcmp (arg, "-s") == 0) 1683 { 1684 expecting_sec_name = 1; 1685 expecting_sec_addr = 1; 1686 } 1687 } 1688 else 1689 { 1690 if (expecting_sec_name) 1691 { 1692 sect_opts[section_index].name = arg; 1693 expecting_sec_name = 0; 1694 } 1695 else 1696 if (expecting_sec_addr) 1697 { 1698 sect_opts[section_index].value = arg; 1699 expecting_sec_addr = 0; 1700 if (++section_index > num_sect_opts) 1701 { 1702 num_sect_opts *= 2; 1703 sect_opts = ((struct sect_opt *) 1704 xrealloc (sect_opts, 1705 num_sect_opts 1706 * sizeof (struct sect_opt))); 1707 } 1708 } 1709 else 1710 error ("USAGE: add-symbol-file <filename> <textaddress> [-mapped] [-readnow] [-s <secname> <addr>]*"); 1711 } 1712 } 1713 argcnt++; 1714 } 1715 1716 /* Print the prompt for the query below. And save the arguments into 1717 a sect_addr_info structure to be passed around to other 1718 functions. We have to split this up into separate print 1719 statements because local_hex_string returns a local static 1720 string. */ 1721 1722 printf_unfiltered ("add symbol table from file \"%s\" at\n", filename); 1723 section_addrs = alloc_section_addr_info (section_index); 1724 make_cleanup (xfree, section_addrs); 1725 for (i = 0; i < section_index; i++) 1726 { 1727 CORE_ADDR addr; 1728 char *val = sect_opts[i].value; 1729 char *sec = sect_opts[i].name; 1730 1731 addr = parse_and_eval_address (val); 1732 1733 /* Here we store the section offsets in the order they were 1734 entered on the command line. */ 1735 section_addrs->other[sec_num].name = sec; 1736 section_addrs->other[sec_num].addr = addr; 1737 printf_unfiltered ("\t%s_addr = %s\n", 1738 sec, 1739 local_hex_string ((unsigned long)addr)); 1740 sec_num++; 1741 1742 /* The object's sections are initialized when a 1743 call is made to build_objfile_section_table (objfile). 1744 This happens in reread_symbols. 1745 At this point, we don't know what file type this is, 1746 so we can't determine what section names are valid. */ 1747 } 1748 1749 if (from_tty && (!query ("%s", ""))) 1750 error ("Not confirmed."); 1751 1752 symbol_file_add (filename, from_tty, section_addrs, 0, flags); 1753 1754 /* Getting new symbols may change our opinion about what is 1755 frameless. */ 1756 reinit_frame_cache (); 1757 do_cleanups (my_cleanups); 1758} 1759 1760static void 1761add_shared_symbol_files_command (char *args, int from_tty) 1762{ 1763#ifdef ADD_SHARED_SYMBOL_FILES 1764 ADD_SHARED_SYMBOL_FILES (args, from_tty); 1765#else 1766 error ("This command is not available in this configuration of GDB."); 1767#endif 1768} 1769 1770/* Re-read symbols if a symbol-file has changed. */ 1771void 1772reread_symbols (void) 1773{ 1774 struct objfile *objfile; 1775 long new_modtime; 1776 int reread_one = 0; 1777 struct stat new_statbuf; 1778 int res; 1779 1780 /* With the addition of shared libraries, this should be modified, 1781 the load time should be saved in the partial symbol tables, since 1782 different tables may come from different source files. FIXME. 1783 This routine should then walk down each partial symbol table 1784 and see if the symbol table that it originates from has been changed */ 1785 1786 for (objfile = object_files; objfile; objfile = objfile->next) 1787 { 1788 if (objfile->obfd) 1789 { 1790#ifdef DEPRECATED_IBM6000_TARGET 1791 /* If this object is from a shared library, then you should 1792 stat on the library name, not member name. */ 1793 1794 if (objfile->obfd->my_archive) 1795 res = stat (objfile->obfd->my_archive->filename, &new_statbuf); 1796 else 1797#endif 1798 res = stat (objfile->name, &new_statbuf); 1799 if (res != 0) 1800 { 1801 /* FIXME, should use print_sys_errmsg but it's not filtered. */ 1802 printf_unfiltered ("`%s' has disappeared; keeping its symbols.\n", 1803 objfile->name); 1804 continue; 1805 } 1806 new_modtime = new_statbuf.st_mtime; 1807 if (new_modtime != objfile->mtime) 1808 { 1809 struct cleanup *old_cleanups; 1810 struct section_offsets *offsets; 1811 int num_offsets; 1812 char *obfd_filename; 1813 1814 printf_unfiltered ("`%s' has changed; re-reading symbols.\n", 1815 objfile->name); 1816 1817 /* There are various functions like symbol_file_add, 1818 symfile_bfd_open, syms_from_objfile, etc., which might 1819 appear to do what we want. But they have various other 1820 effects which we *don't* want. So we just do stuff 1821 ourselves. We don't worry about mapped files (for one thing, 1822 any mapped file will be out of date). */ 1823 1824 /* If we get an error, blow away this objfile (not sure if 1825 that is the correct response for things like shared 1826 libraries). */ 1827 old_cleanups = make_cleanup_free_objfile (objfile); 1828 /* We need to do this whenever any symbols go away. */ 1829 make_cleanup (clear_symtab_users_cleanup, 0 /*ignore*/); 1830 1831 /* Clean up any state BFD has sitting around. We don't need 1832 to close the descriptor but BFD lacks a way of closing the 1833 BFD without closing the descriptor. */ 1834 obfd_filename = bfd_get_filename (objfile->obfd); 1835 if (!bfd_close (objfile->obfd)) 1836 error ("Can't close BFD for %s: %s", objfile->name, 1837 bfd_errmsg (bfd_get_error ())); 1838 objfile->obfd = bfd_openr (obfd_filename, gnutarget); 1839 if (objfile->obfd == NULL) 1840 error ("Can't open %s to read symbols.", objfile->name); 1841 /* bfd_openr sets cacheable to true, which is what we want. */ 1842 if (!bfd_check_format (objfile->obfd, bfd_object)) 1843 error ("Can't read symbols from %s: %s.", objfile->name, 1844 bfd_errmsg (bfd_get_error ())); 1845 1846 /* Save the offsets, we will nuke them with the rest of the 1847 objfile_obstack. */ 1848 num_offsets = objfile->num_sections; 1849 offsets = ((struct section_offsets *) 1850 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets))); 1851 memcpy (offsets, objfile->section_offsets, 1852 SIZEOF_N_SECTION_OFFSETS (num_offsets)); 1853 1854 /* Nuke all the state that we will re-read. Much of the following 1855 code which sets things to NULL really is necessary to tell 1856 other parts of GDB that there is nothing currently there. */ 1857 1858 /* FIXME: Do we have to free a whole linked list, or is this 1859 enough? */ 1860 if (objfile->global_psymbols.list) 1861 xmfree (objfile->md, objfile->global_psymbols.list); 1862 memset (&objfile->global_psymbols, 0, 1863 sizeof (objfile->global_psymbols)); 1864 if (objfile->static_psymbols.list) 1865 xmfree (objfile->md, objfile->static_psymbols.list); 1866 memset (&objfile->static_psymbols, 0, 1867 sizeof (objfile->static_psymbols)); 1868 1869 /* Free the obstacks for non-reusable objfiles */ 1870 bcache_xfree (objfile->psymbol_cache); 1871 objfile->psymbol_cache = bcache_xmalloc (); 1872 bcache_xfree (objfile->macro_cache); 1873 objfile->macro_cache = bcache_xmalloc (); 1874 if (objfile->demangled_names_hash != NULL) 1875 { 1876 htab_delete (objfile->demangled_names_hash); 1877 objfile->demangled_names_hash = NULL; 1878 } 1879 obstack_free (&objfile->objfile_obstack, 0); 1880 objfile->sections = NULL; 1881 objfile->symtabs = NULL; 1882 objfile->psymtabs = NULL; 1883 objfile->free_psymtabs = NULL; 1884 objfile->cp_namespace_symtab = NULL; 1885 objfile->msymbols = NULL; 1886 objfile->sym_private = NULL; 1887 objfile->minimal_symbol_count = 0; 1888 memset (&objfile->msymbol_hash, 0, 1889 sizeof (objfile->msymbol_hash)); 1890 memset (&objfile->msymbol_demangled_hash, 0, 1891 sizeof (objfile->msymbol_demangled_hash)); 1892 objfile->fundamental_types = NULL; 1893 clear_objfile_data (objfile); 1894 if (objfile->sf != NULL) 1895 { 1896 (*objfile->sf->sym_finish) (objfile); 1897 } 1898 1899 /* We never make this a mapped file. */ 1900 objfile->md = NULL; 1901 objfile->psymbol_cache = bcache_xmalloc (); 1902 objfile->macro_cache = bcache_xmalloc (); 1903 /* obstack_init also initializes the obstack so it is 1904 empty. We could use obstack_specify_allocation but 1905 gdb_obstack.h specifies the alloc/dealloc 1906 functions. */ 1907 obstack_init (&objfile->objfile_obstack); 1908 if (build_objfile_section_table (objfile)) 1909 { 1910 error ("Can't find the file sections in `%s': %s", 1911 objfile->name, bfd_errmsg (bfd_get_error ())); 1912 } 1913 terminate_minimal_symbol_table (objfile); 1914 1915 /* We use the same section offsets as from last time. I'm not 1916 sure whether that is always correct for shared libraries. */ 1917 objfile->section_offsets = (struct section_offsets *) 1918 obstack_alloc (&objfile->objfile_obstack, 1919 SIZEOF_N_SECTION_OFFSETS (num_offsets)); 1920 memcpy (objfile->section_offsets, offsets, 1921 SIZEOF_N_SECTION_OFFSETS (num_offsets)); 1922 objfile->num_sections = num_offsets; 1923 1924 /* What the hell is sym_new_init for, anyway? The concept of 1925 distinguishing between the main file and additional files 1926 in this way seems rather dubious. */ 1927 if (objfile == symfile_objfile) 1928 { 1929 (*objfile->sf->sym_new_init) (objfile); 1930#ifdef HPUXHPPA 1931 RESET_HP_UX_GLOBALS (); 1932#endif 1933 } 1934 1935 (*objfile->sf->sym_init) (objfile); 1936 clear_complaints (&symfile_complaints, 1, 1); 1937 /* The "mainline" parameter is a hideous hack; I think leaving it 1938 zero is OK since dbxread.c also does what it needs to do if 1939 objfile->global_psymbols.size is 0. */ 1940 (*objfile->sf->sym_read) (objfile, 0); 1941 if (!have_partial_symbols () && !have_full_symbols ()) 1942 { 1943 wrap_here (""); 1944 printf_unfiltered ("(no debugging symbols found)\n"); 1945 wrap_here (""); 1946 } 1947 objfile->flags |= OBJF_SYMS; 1948 1949 /* We're done reading the symbol file; finish off complaints. */ 1950 clear_complaints (&symfile_complaints, 0, 1); 1951 1952 /* Getting new symbols may change our opinion about what is 1953 frameless. */ 1954 1955 reinit_frame_cache (); 1956 1957 /* Discard cleanups as symbol reading was successful. */ 1958 discard_cleanups (old_cleanups); 1959 1960 /* If the mtime has changed between the time we set new_modtime 1961 and now, we *want* this to be out of date, so don't call stat 1962 again now. */ 1963 objfile->mtime = new_modtime; 1964 reread_one = 1; 1965 reread_separate_symbols (objfile); 1966 } 1967 } 1968 } 1969 1970 if (reread_one) 1971 clear_symtab_users (); 1972} 1973 1974 1975/* Handle separate debug info for OBJFILE, which has just been 1976 re-read: 1977 - If we had separate debug info before, but now we don't, get rid 1978 of the separated objfile. 1979 - If we didn't have separated debug info before, but now we do, 1980 read in the new separated debug info file. 1981 - If the debug link points to a different file, toss the old one 1982 and read the new one. 1983 This function does *not* handle the case where objfile is still 1984 using the same separate debug info file, but that file's timestamp 1985 has changed. That case should be handled by the loop in 1986 reread_symbols already. */ 1987static void 1988reread_separate_symbols (struct objfile *objfile) 1989{ 1990 char *debug_file; 1991 unsigned long crc32; 1992 1993 /* Does the updated objfile's debug info live in a 1994 separate file? */ 1995 debug_file = find_separate_debug_file (objfile); 1996 1997 if (objfile->separate_debug_objfile) 1998 { 1999 /* There are two cases where we need to get rid of 2000 the old separated debug info objfile: 2001 - if the new primary objfile doesn't have 2002 separated debug info, or 2003 - if the new primary objfile has separate debug 2004 info, but it's under a different filename. 2005 2006 If the old and new objfiles both have separate 2007 debug info, under the same filename, then we're 2008 okay --- if the separated file's contents have 2009 changed, we will have caught that when we 2010 visited it in this function's outermost 2011 loop. */ 2012 if (! debug_file 2013 || strcmp (debug_file, objfile->separate_debug_objfile->name) != 0) 2014 free_objfile (objfile->separate_debug_objfile); 2015 } 2016 2017 /* If the new objfile has separate debug info, and we 2018 haven't loaded it already, do so now. */ 2019 if (debug_file 2020 && ! objfile->separate_debug_objfile) 2021 { 2022 /* Use the same section offset table as objfile itself. 2023 Preserve the flags from objfile that make sense. */ 2024 objfile->separate_debug_objfile 2025 = (symbol_file_add_with_addrs_or_offsets 2026 (debug_file, 2027 info_verbose, /* from_tty: Don't override the default. */ 2028 0, /* No addr table. */ 2029 objfile->section_offsets, objfile->num_sections, 2030 0, /* Not mainline. See comments about this above. */ 2031 objfile->flags & (OBJF_REORDERED | OBJF_SHARED | OBJF_READNOW 2032 | OBJF_USERLOADED))); 2033 objfile->separate_debug_objfile->separate_debug_objfile_backlink 2034 = objfile; 2035 } 2036} 2037 2038 2039 2040 2041 2042typedef struct 2043{ 2044 char *ext; 2045 enum language lang; 2046} 2047filename_language; 2048 2049static filename_language *filename_language_table; 2050static int fl_table_size, fl_table_next; 2051 2052static void 2053add_filename_language (char *ext, enum language lang) 2054{ 2055 if (fl_table_next >= fl_table_size) 2056 { 2057 fl_table_size += 10; 2058 filename_language_table = 2059 xrealloc (filename_language_table, 2060 fl_table_size * sizeof (*filename_language_table)); 2061 } 2062 2063 filename_language_table[fl_table_next].ext = xstrdup (ext); 2064 filename_language_table[fl_table_next].lang = lang; 2065 fl_table_next++; 2066} 2067 2068static char *ext_args; 2069 2070static void 2071set_ext_lang_command (char *args, int from_tty) 2072{ 2073 int i; 2074 char *cp = ext_args; 2075 enum language lang; 2076 2077 /* First arg is filename extension, starting with '.' */ 2078 if (*cp != '.') 2079 error ("'%s': Filename extension must begin with '.'", ext_args); 2080 2081 /* Find end of first arg. */ 2082 while (*cp && !isspace (*cp)) 2083 cp++; 2084 2085 if (*cp == '\0') 2086 error ("'%s': two arguments required -- filename extension and language", 2087 ext_args); 2088 2089 /* Null-terminate first arg */ 2090 *cp++ = '\0'; 2091 2092 /* Find beginning of second arg, which should be a source language. */ 2093 while (*cp && isspace (*cp)) 2094 cp++; 2095 2096 if (*cp == '\0') 2097 error ("'%s': two arguments required -- filename extension and language", 2098 ext_args); 2099 2100 /* Lookup the language from among those we know. */ 2101 lang = language_enum (cp); 2102 2103 /* Now lookup the filename extension: do we already know it? */ 2104 for (i = 0; i < fl_table_next; i++) 2105 if (0 == strcmp (ext_args, filename_language_table[i].ext)) 2106 break; 2107 2108 if (i >= fl_table_next) 2109 { 2110 /* new file extension */ 2111 add_filename_language (ext_args, lang); 2112 } 2113 else 2114 { 2115 /* redefining a previously known filename extension */ 2116 2117 /* if (from_tty) */ 2118 /* query ("Really make files of type %s '%s'?", */ 2119 /* ext_args, language_str (lang)); */ 2120 2121 xfree (filename_language_table[i].ext); 2122 filename_language_table[i].ext = xstrdup (ext_args); 2123 filename_language_table[i].lang = lang; 2124 } 2125} 2126 2127static void 2128info_ext_lang_command (char *args, int from_tty) 2129{ 2130 int i; 2131 2132 printf_filtered ("Filename extensions and the languages they represent:"); 2133 printf_filtered ("\n\n"); 2134 for (i = 0; i < fl_table_next; i++) 2135 printf_filtered ("\t%s\t- %s\n", 2136 filename_language_table[i].ext, 2137 language_str (filename_language_table[i].lang)); 2138} 2139 2140static void 2141init_filename_language_table (void) 2142{ 2143 if (fl_table_size == 0) /* protect against repetition */ 2144 { 2145 fl_table_size = 20; 2146 fl_table_next = 0; 2147 filename_language_table = 2148 xmalloc (fl_table_size * sizeof (*filename_language_table)); 2149 add_filename_language (".c", language_c); 2150 add_filename_language (".C", language_cplus); 2151 add_filename_language (".cc", language_cplus); 2152 add_filename_language (".cp", language_cplus); 2153 add_filename_language (".cpp", language_cplus); 2154 add_filename_language (".cxx", language_cplus); 2155 add_filename_language (".c++", language_cplus); 2156 add_filename_language (".java", language_java); 2157 add_filename_language (".class", language_java); 2158 add_filename_language (".m", language_objc); 2159 add_filename_language (".f", language_fortran); 2160 add_filename_language (".F", language_fortran); 2161 add_filename_language (".s", language_asm); 2162 add_filename_language (".S", language_asm); 2163 add_filename_language (".pas", language_pascal); 2164 add_filename_language (".p", language_pascal); 2165 add_filename_language (".pp", language_pascal); 2166 } 2167} 2168 2169enum language 2170deduce_language_from_filename (char *filename) 2171{ 2172 int i; 2173 char *cp; 2174 2175 if (filename != NULL) 2176 if ((cp = strrchr (filename, '.')) != NULL) 2177 for (i = 0; i < fl_table_next; i++) 2178 if (strcmp (cp, filename_language_table[i].ext) == 0) 2179 return filename_language_table[i].lang; 2180 2181 return language_unknown; 2182} 2183 2184/* allocate_symtab: 2185 2186 Allocate and partly initialize a new symbol table. Return a pointer 2187 to it. error() if no space. 2188 2189 Caller must set these fields: 2190 LINETABLE(symtab) 2191 symtab->blockvector 2192 symtab->dirname 2193 symtab->free_code 2194 symtab->free_ptr 2195 possibly free_named_symtabs (symtab->filename); 2196 */ 2197 2198struct symtab * 2199allocate_symtab (char *filename, struct objfile *objfile) 2200{ 2201 struct symtab *symtab; 2202 2203 symtab = (struct symtab *) 2204 obstack_alloc (&objfile->objfile_obstack, sizeof (struct symtab)); 2205 memset (symtab, 0, sizeof (*symtab)); 2206 symtab->filename = obsavestring (filename, strlen (filename), 2207 &objfile->objfile_obstack); 2208 symtab->fullname = NULL; 2209 symtab->language = deduce_language_from_filename (filename); 2210 symtab->debugformat = obsavestring ("unknown", 7, 2211 &objfile->objfile_obstack); 2212 2213 /* Hook it to the objfile it comes from */ 2214 2215 symtab->objfile = objfile; 2216 symtab->next = objfile->symtabs; 2217 objfile->symtabs = symtab; 2218 2219 /* FIXME: This should go away. It is only defined for the Z8000, 2220 and the Z8000 definition of this macro doesn't have anything to 2221 do with the now-nonexistent EXTRA_SYMTAB_INFO macro, it's just 2222 here for convenience. */ 2223#ifdef INIT_EXTRA_SYMTAB_INFO 2224 INIT_EXTRA_SYMTAB_INFO (symtab); 2225#endif 2226 2227 return (symtab); 2228} 2229 2230struct partial_symtab * 2231allocate_psymtab (char *filename, struct objfile *objfile) 2232{ 2233 struct partial_symtab *psymtab; 2234 2235 if (objfile->free_psymtabs) 2236 { 2237 psymtab = objfile->free_psymtabs; 2238 objfile->free_psymtabs = psymtab->next; 2239 } 2240 else 2241 psymtab = (struct partial_symtab *) 2242 obstack_alloc (&objfile->objfile_obstack, 2243 sizeof (struct partial_symtab)); 2244 2245 memset (psymtab, 0, sizeof (struct partial_symtab)); 2246 psymtab->filename = obsavestring (filename, strlen (filename), 2247 &objfile->objfile_obstack); 2248 psymtab->symtab = NULL; 2249 2250 /* Prepend it to the psymtab list for the objfile it belongs to. 2251 Psymtabs are searched in most recent inserted -> least recent 2252 inserted order. */ 2253 2254 psymtab->objfile = objfile; 2255 psymtab->next = objfile->psymtabs; 2256 objfile->psymtabs = psymtab; 2257#if 0 2258 { 2259 struct partial_symtab **prev_pst; 2260 psymtab->objfile = objfile; 2261 psymtab->next = NULL; 2262 prev_pst = &(objfile->psymtabs); 2263 while ((*prev_pst) != NULL) 2264 prev_pst = &((*prev_pst)->next); 2265 (*prev_pst) = psymtab; 2266 } 2267#endif 2268 2269 return (psymtab); 2270} 2271 2272void 2273discard_psymtab (struct partial_symtab *pst) 2274{ 2275 struct partial_symtab **prev_pst; 2276 2277 /* From dbxread.c: 2278 Empty psymtabs happen as a result of header files which don't 2279 have any symbols in them. There can be a lot of them. But this 2280 check is wrong, in that a psymtab with N_SLINE entries but 2281 nothing else is not empty, but we don't realize that. Fixing 2282 that without slowing things down might be tricky. */ 2283 2284 /* First, snip it out of the psymtab chain */ 2285 2286 prev_pst = &(pst->objfile->psymtabs); 2287 while ((*prev_pst) != pst) 2288 prev_pst = &((*prev_pst)->next); 2289 (*prev_pst) = pst->next; 2290 2291 /* Next, put it on a free list for recycling */ 2292 2293 pst->next = pst->objfile->free_psymtabs; 2294 pst->objfile->free_psymtabs = pst; 2295} 2296 2297 2298/* Reset all data structures in gdb which may contain references to symbol 2299 table data. */ 2300 2301void 2302clear_symtab_users (void) 2303{ 2304 /* Someday, we should do better than this, by only blowing away 2305 the things that really need to be blown. */ 2306 clear_value_history (); 2307 clear_displays (); 2308 clear_internalvars (); 2309 breakpoint_re_set (); 2310 set_default_breakpoint (0, 0, 0, 0); 2311 clear_current_source_symtab_and_line (); 2312 clear_pc_function_cache (); 2313 if (target_new_objfile_hook) 2314 target_new_objfile_hook (NULL); 2315} 2316 2317static void 2318clear_symtab_users_cleanup (void *ignore) 2319{ 2320 clear_symtab_users (); 2321} 2322 2323/* clear_symtab_users_once: 2324 2325 This function is run after symbol reading, or from a cleanup. 2326 If an old symbol table was obsoleted, the old symbol table 2327 has been blown away, but the other GDB data structures that may 2328 reference it have not yet been cleared or re-directed. (The old 2329 symtab was zapped, and the cleanup queued, in free_named_symtab() 2330 below.) 2331 2332 This function can be queued N times as a cleanup, or called 2333 directly; it will do all the work the first time, and then will be a 2334 no-op until the next time it is queued. This works by bumping a 2335 counter at queueing time. Much later when the cleanup is run, or at 2336 the end of symbol processing (in case the cleanup is discarded), if 2337 the queued count is greater than the "done-count", we do the work 2338 and set the done-count to the queued count. If the queued count is 2339 less than or equal to the done-count, we just ignore the call. This 2340 is needed because reading a single .o file will often replace many 2341 symtabs (one per .h file, for example), and we don't want to reset 2342 the breakpoints N times in the user's face. 2343 2344 The reason we both queue a cleanup, and call it directly after symbol 2345 reading, is because the cleanup protects us in case of errors, but is 2346 discarded if symbol reading is successful. */ 2347 2348#if 0 2349/* FIXME: As free_named_symtabs is currently a big noop this function 2350 is no longer needed. */ 2351static void clear_symtab_users_once (void); 2352 2353static int clear_symtab_users_queued; 2354static int clear_symtab_users_done; 2355 2356static void 2357clear_symtab_users_once (void) 2358{ 2359 /* Enforce once-per-`do_cleanups'-semantics */ 2360 if (clear_symtab_users_queued <= clear_symtab_users_done) 2361 return; 2362 clear_symtab_users_done = clear_symtab_users_queued; 2363 2364 clear_symtab_users (); 2365} 2366#endif 2367 2368/* Delete the specified psymtab, and any others that reference it. */ 2369 2370static void 2371cashier_psymtab (struct partial_symtab *pst) 2372{ 2373 struct partial_symtab *ps, *pprev = NULL; 2374 int i; 2375 2376 /* Find its previous psymtab in the chain */ 2377 for (ps = pst->objfile->psymtabs; ps; ps = ps->next) 2378 { 2379 if (ps == pst) 2380 break; 2381 pprev = ps; 2382 } 2383 2384 if (ps) 2385 { 2386 /* Unhook it from the chain. */ 2387 if (ps == pst->objfile->psymtabs) 2388 pst->objfile->psymtabs = ps->next; 2389 else 2390 pprev->next = ps->next; 2391 2392 /* FIXME, we can't conveniently deallocate the entries in the 2393 partial_symbol lists (global_psymbols/static_psymbols) that 2394 this psymtab points to. These just take up space until all 2395 the psymtabs are reclaimed. Ditto the dependencies list and 2396 filename, which are all in the objfile_obstack. */ 2397 2398 /* We need to cashier any psymtab that has this one as a dependency... */ 2399 again: 2400 for (ps = pst->objfile->psymtabs; ps; ps = ps->next) 2401 { 2402 for (i = 0; i < ps->number_of_dependencies; i++) 2403 { 2404 if (ps->dependencies[i] == pst) 2405 { 2406 cashier_psymtab (ps); 2407 goto again; /* Must restart, chain has been munged. */ 2408 } 2409 } 2410 } 2411 } 2412} 2413 2414/* If a symtab or psymtab for filename NAME is found, free it along 2415 with any dependent breakpoints, displays, etc. 2416 Used when loading new versions of object modules with the "add-file" 2417 command. This is only called on the top-level symtab or psymtab's name; 2418 it is not called for subsidiary files such as .h files. 2419 2420 Return value is 1 if we blew away the environment, 0 if not. 2421 FIXME. The return value appears to never be used. 2422 2423 FIXME. I think this is not the best way to do this. We should 2424 work on being gentler to the environment while still cleaning up 2425 all stray pointers into the freed symtab. */ 2426 2427int 2428free_named_symtabs (char *name) 2429{ 2430#if 0 2431 /* FIXME: With the new method of each objfile having it's own 2432 psymtab list, this function needs serious rethinking. In particular, 2433 why was it ever necessary to toss psymtabs with specific compilation 2434 unit filenames, as opposed to all psymtabs from a particular symbol 2435 file? -- fnf 2436 Well, the answer is that some systems permit reloading of particular 2437 compilation units. We want to blow away any old info about these 2438 compilation units, regardless of which objfiles they arrived in. --gnu. */ 2439 2440 struct symtab *s; 2441 struct symtab *prev; 2442 struct partial_symtab *ps; 2443 struct blockvector *bv; 2444 int blewit = 0; 2445 2446 /* We only wack things if the symbol-reload switch is set. */ 2447 if (!symbol_reloading) 2448 return 0; 2449 2450 /* Some symbol formats have trouble providing file names... */ 2451 if (name == 0 || *name == '\0') 2452 return 0; 2453 2454 /* Look for a psymtab with the specified name. */ 2455 2456again2: 2457 for (ps = partial_symtab_list; ps; ps = ps->next) 2458 { 2459 if (strcmp (name, ps->filename) == 0) 2460 { 2461 cashier_psymtab (ps); /* Blow it away...and its little dog, too. */ 2462 goto again2; /* Must restart, chain has been munged */ 2463 } 2464 } 2465 2466 /* Look for a symtab with the specified name. */ 2467 2468 for (s = symtab_list; s; s = s->next) 2469 { 2470 if (strcmp (name, s->filename) == 0) 2471 break; 2472 prev = s; 2473 } 2474 2475 if (s) 2476 { 2477 if (s == symtab_list) 2478 symtab_list = s->next; 2479 else 2480 prev->next = s->next; 2481 2482 /* For now, queue a delete for all breakpoints, displays, etc., whether 2483 or not they depend on the symtab being freed. This should be 2484 changed so that only those data structures affected are deleted. */ 2485 2486 /* But don't delete anything if the symtab is empty. 2487 This test is necessary due to a bug in "dbxread.c" that 2488 causes empty symtabs to be created for N_SO symbols that 2489 contain the pathname of the object file. (This problem 2490 has been fixed in GDB 3.9x). */ 2491 2492 bv = BLOCKVECTOR (s); 2493 if (BLOCKVECTOR_NBLOCKS (bv) > 2 2494 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK)) 2495 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK))) 2496 { 2497 complaint (&symfile_complaints, "Replacing old symbols for `%s'", 2498 name); 2499 clear_symtab_users_queued++; 2500 make_cleanup (clear_symtab_users_once, 0); 2501 blewit = 1; 2502 } 2503 else 2504 { 2505 complaint (&symfile_complaints, "Empty symbol table found for `%s'", 2506 name); 2507 } 2508 2509 free_symtab (s); 2510 } 2511 else 2512 { 2513 /* It is still possible that some breakpoints will be affected 2514 even though no symtab was found, since the file might have 2515 been compiled without debugging, and hence not be associated 2516 with a symtab. In order to handle this correctly, we would need 2517 to keep a list of text address ranges for undebuggable files. 2518 For now, we do nothing, since this is a fairly obscure case. */ 2519 ; 2520 } 2521 2522 /* FIXME, what about the minimal symbol table? */ 2523 return blewit; 2524#else 2525 return (0); 2526#endif 2527} 2528 2529/* Allocate and partially fill a partial symtab. It will be 2530 completely filled at the end of the symbol list. 2531 2532 FILENAME is the name of the symbol-file we are reading from. */ 2533 2534struct partial_symtab * 2535start_psymtab_common (struct objfile *objfile, 2536 struct section_offsets *section_offsets, char *filename, 2537 CORE_ADDR textlow, struct partial_symbol **global_syms, 2538 struct partial_symbol **static_syms) 2539{ 2540 struct partial_symtab *psymtab; 2541 2542 psymtab = allocate_psymtab (filename, objfile); 2543 psymtab->section_offsets = section_offsets; 2544 psymtab->textlow = textlow; 2545 psymtab->texthigh = psymtab->textlow; /* default */ 2546 psymtab->globals_offset = global_syms - objfile->global_psymbols.list; 2547 psymtab->statics_offset = static_syms - objfile->static_psymbols.list; 2548 return (psymtab); 2549} 2550 2551/* Add a symbol with a long value to a psymtab. 2552 Since one arg is a struct, we pass in a ptr and deref it (sigh). 2553 Return the partial symbol that has been added. */ 2554 2555/* NOTE: carlton/2003-09-11: The reason why we return the partial 2556 symbol is so that callers can get access to the symbol's demangled 2557 name, which they don't have any cheap way to determine otherwise. 2558 (Currenly, dwarf2read.c is the only file who uses that information, 2559 though it's possible that other readers might in the future.) 2560 Elena wasn't thrilled about that, and I don't blame her, but we 2561 couldn't come up with a better way to get that information. If 2562 it's needed in other situations, we could consider breaking up 2563 SYMBOL_SET_NAMES to provide access to the demangled name lookup 2564 cache. */ 2565 2566const struct partial_symbol * 2567add_psymbol_to_list (char *name, int namelength, domain_enum domain, 2568 enum address_class class, 2569 struct psymbol_allocation_list *list, long val, /* Value as a long */ 2570 CORE_ADDR coreaddr, /* Value as a CORE_ADDR */ 2571 enum language language, struct objfile *objfile) 2572{ 2573 struct partial_symbol *psym; 2574 char *buf = alloca (namelength + 1); 2575 /* psymbol is static so that there will be no uninitialized gaps in the 2576 structure which might contain random data, causing cache misses in 2577 bcache. */ 2578 static struct partial_symbol psymbol; 2579 2580 /* Create local copy of the partial symbol */ 2581 memcpy (buf, name, namelength); 2582 buf[namelength] = '\0'; 2583 /* val and coreaddr are mutually exclusive, one of them *will* be zero */ 2584 if (val != 0) 2585 { 2586 SYMBOL_VALUE (&psymbol) = val; 2587 } 2588 else 2589 { 2590 SYMBOL_VALUE_ADDRESS (&psymbol) = coreaddr; 2591 } 2592 SYMBOL_SECTION (&psymbol) = 0; 2593 SYMBOL_LANGUAGE (&psymbol) = language; 2594 PSYMBOL_DOMAIN (&psymbol) = domain; 2595 PSYMBOL_CLASS (&psymbol) = class; 2596 2597 SYMBOL_SET_NAMES (&psymbol, buf, namelength, objfile); 2598 2599 /* Stash the partial symbol away in the cache */ 2600 psym = deprecated_bcache (&psymbol, sizeof (struct partial_symbol), 2601 objfile->psymbol_cache); 2602 2603 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */ 2604 if (list->next >= list->list + list->size) 2605 { 2606 extend_psymbol_list (list, objfile); 2607 } 2608 *list->next++ = psym; 2609 OBJSTAT (objfile, n_psyms++); 2610 2611 return psym; 2612} 2613 2614/* Add a symbol with a long value to a psymtab. This differs from 2615 * add_psymbol_to_list above in taking both a mangled and a demangled 2616 * name. */ 2617 2618void 2619add_psymbol_with_dem_name_to_list (char *name, int namelength, char *dem_name, 2620 int dem_namelength, domain_enum domain, 2621 enum address_class class, 2622 struct psymbol_allocation_list *list, long val, /* Value as a long */ 2623 CORE_ADDR coreaddr, /* Value as a CORE_ADDR */ 2624 enum language language, 2625 struct objfile *objfile) 2626{ 2627 struct partial_symbol *psym; 2628 char *buf = alloca (namelength + 1); 2629 /* psymbol is static so that there will be no uninitialized gaps in the 2630 structure which might contain random data, causing cache misses in 2631 bcache. */ 2632 static struct partial_symbol psymbol; 2633 2634 /* Create local copy of the partial symbol */ 2635 2636 memcpy (buf, name, namelength); 2637 buf[namelength] = '\0'; 2638 DEPRECATED_SYMBOL_NAME (&psymbol) = deprecated_bcache (buf, namelength + 1, 2639 objfile->psymbol_cache); 2640 2641 buf = alloca (dem_namelength + 1); 2642 memcpy (buf, dem_name, dem_namelength); 2643 buf[dem_namelength] = '\0'; 2644 2645 switch (language) 2646 { 2647 case language_c: 2648 case language_cplus: 2649 SYMBOL_CPLUS_DEMANGLED_NAME (&psymbol) = 2650 deprecated_bcache (buf, dem_namelength + 1, objfile->psymbol_cache); 2651 break; 2652 /* FIXME What should be done for the default case? Ignoring for now. */ 2653 } 2654 2655 /* val and coreaddr are mutually exclusive, one of them *will* be zero */ 2656 if (val != 0) 2657 { 2658 SYMBOL_VALUE (&psymbol) = val; 2659 } 2660 else 2661 { 2662 SYMBOL_VALUE_ADDRESS (&psymbol) = coreaddr; 2663 } 2664 SYMBOL_SECTION (&psymbol) = 0; 2665 SYMBOL_LANGUAGE (&psymbol) = language; 2666 PSYMBOL_DOMAIN (&psymbol) = domain; 2667 PSYMBOL_CLASS (&psymbol) = class; 2668 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol, language); 2669 2670 /* Stash the partial symbol away in the cache */ 2671 psym = deprecated_bcache (&psymbol, sizeof (struct partial_symbol), 2672 objfile->psymbol_cache); 2673 2674 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */ 2675 if (list->next >= list->list + list->size) 2676 { 2677 extend_psymbol_list (list, objfile); 2678 } 2679 *list->next++ = psym; 2680 OBJSTAT (objfile, n_psyms++); 2681} 2682 2683/* Initialize storage for partial symbols. */ 2684 2685void 2686init_psymbol_list (struct objfile *objfile, int total_symbols) 2687{ 2688 /* Free any previously allocated psymbol lists. */ 2689 2690 if (objfile->global_psymbols.list) 2691 { 2692 xmfree (objfile->md, objfile->global_psymbols.list); 2693 } 2694 if (objfile->static_psymbols.list) 2695 { 2696 xmfree (objfile->md, objfile->static_psymbols.list); 2697 } 2698 2699 /* Current best guess is that approximately a twentieth 2700 of the total symbols (in a debugging file) are global or static 2701 oriented symbols */ 2702 2703 objfile->global_psymbols.size = total_symbols / 10; 2704 objfile->static_psymbols.size = total_symbols / 10; 2705 2706 if (objfile->global_psymbols.size > 0) 2707 { 2708 objfile->global_psymbols.next = 2709 objfile->global_psymbols.list = (struct partial_symbol **) 2710 xmmalloc (objfile->md, (objfile->global_psymbols.size 2711 * sizeof (struct partial_symbol *))); 2712 } 2713 if (objfile->static_psymbols.size > 0) 2714 { 2715 objfile->static_psymbols.next = 2716 objfile->static_psymbols.list = (struct partial_symbol **) 2717 xmmalloc (objfile->md, (objfile->static_psymbols.size 2718 * sizeof (struct partial_symbol *))); 2719 } 2720} 2721 2722/* OVERLAYS: 2723 The following code implements an abstraction for debugging overlay sections. 2724 2725 The target model is as follows: 2726 1) The gnu linker will permit multiple sections to be mapped into the 2727 same VMA, each with its own unique LMA (or load address). 2728 2) It is assumed that some runtime mechanism exists for mapping the 2729 sections, one by one, from the load address into the VMA address. 2730 3) This code provides a mechanism for gdb to keep track of which 2731 sections should be considered to be mapped from the VMA to the LMA. 2732 This information is used for symbol lookup, and memory read/write. 2733 For instance, if a section has been mapped then its contents 2734 should be read from the VMA, otherwise from the LMA. 2735 2736 Two levels of debugger support for overlays are available. One is 2737 "manual", in which the debugger relies on the user to tell it which 2738 overlays are currently mapped. This level of support is 2739 implemented entirely in the core debugger, and the information about 2740 whether a section is mapped is kept in the objfile->obj_section table. 2741 2742 The second level of support is "automatic", and is only available if 2743 the target-specific code provides functionality to read the target's 2744 overlay mapping table, and translate its contents for the debugger 2745 (by updating the mapped state information in the obj_section tables). 2746 2747 The interface is as follows: 2748 User commands: 2749 overlay map <name> -- tell gdb to consider this section mapped 2750 overlay unmap <name> -- tell gdb to consider this section unmapped 2751 overlay list -- list the sections that GDB thinks are mapped 2752 overlay read-target -- get the target's state of what's mapped 2753 overlay off/manual/auto -- set overlay debugging state 2754 Functional interface: 2755 find_pc_mapped_section(pc): if the pc is in the range of a mapped 2756 section, return that section. 2757 find_pc_overlay(pc): find any overlay section that contains 2758 the pc, either in its VMA or its LMA 2759 overlay_is_mapped(sect): true if overlay is marked as mapped 2760 section_is_overlay(sect): true if section's VMA != LMA 2761 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA 2762 pc_in_unmapped_range(...): true if pc belongs to section's LMA 2763 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap 2764 overlay_mapped_address(...): map an address from section's LMA to VMA 2765 overlay_unmapped_address(...): map an address from section's VMA to LMA 2766 symbol_overlayed_address(...): Return a "current" address for symbol: 2767 either in VMA or LMA depending on whether 2768 the symbol's section is currently mapped 2769 */ 2770 2771/* Overlay debugging state: */ 2772 2773enum overlay_debugging_state overlay_debugging = ovly_off; 2774int overlay_cache_invalid = 0; /* True if need to refresh mapped state */ 2775 2776/* Target vector for refreshing overlay mapped state */ 2777static void simple_overlay_update (struct obj_section *); 2778void (*target_overlay_update) (struct obj_section *) = simple_overlay_update; 2779 2780/* Function: section_is_overlay (SECTION) 2781 Returns true if SECTION has VMA not equal to LMA, ie. 2782 SECTION is loaded at an address different from where it will "run". */ 2783 2784int 2785section_is_overlay (asection *section) 2786{ 2787 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */ 2788 2789 if (overlay_debugging) 2790 if (section && section->lma != 0 && 2791 section->vma != section->lma) 2792 return 1; 2793 2794 return 0; 2795} 2796 2797/* Function: overlay_invalidate_all (void) 2798 Invalidate the mapped state of all overlay sections (mark it as stale). */ 2799 2800static void 2801overlay_invalidate_all (void) 2802{ 2803 struct objfile *objfile; 2804 struct obj_section *sect; 2805 2806 ALL_OBJSECTIONS (objfile, sect) 2807 if (section_is_overlay (sect->the_bfd_section)) 2808 sect->ovly_mapped = -1; 2809} 2810 2811/* Function: overlay_is_mapped (SECTION) 2812 Returns true if section is an overlay, and is currently mapped. 2813 Private: public access is thru function section_is_mapped. 2814 2815 Access to the ovly_mapped flag is restricted to this function, so 2816 that we can do automatic update. If the global flag 2817 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call 2818 overlay_invalidate_all. If the mapped state of the particular 2819 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */ 2820 2821static int 2822overlay_is_mapped (struct obj_section *osect) 2823{ 2824 if (osect == 0 || !section_is_overlay (osect->the_bfd_section)) 2825 return 0; 2826 2827 switch (overlay_debugging) 2828 { 2829 default: 2830 case ovly_off: 2831 return 0; /* overlay debugging off */ 2832 case ovly_auto: /* overlay debugging automatic */ 2833 /* Unles there is a target_overlay_update function, 2834 there's really nothing useful to do here (can't really go auto) */ 2835 if (target_overlay_update) 2836 { 2837 if (overlay_cache_invalid) 2838 { 2839 overlay_invalidate_all (); 2840 overlay_cache_invalid = 0; 2841 } 2842 if (osect->ovly_mapped == -1) 2843 (*target_overlay_update) (osect); 2844 } 2845 /* fall thru to manual case */ 2846 case ovly_on: /* overlay debugging manual */ 2847 return osect->ovly_mapped == 1; 2848 } 2849} 2850 2851/* Function: section_is_mapped 2852 Returns true if section is an overlay, and is currently mapped. */ 2853 2854int 2855section_is_mapped (asection *section) 2856{ 2857 struct objfile *objfile; 2858 struct obj_section *osect; 2859 2860 if (overlay_debugging) 2861 if (section && section_is_overlay (section)) 2862 ALL_OBJSECTIONS (objfile, osect) 2863 if (osect->the_bfd_section == section) 2864 return overlay_is_mapped (osect); 2865 2866 return 0; 2867} 2868 2869/* Function: pc_in_unmapped_range 2870 If PC falls into the lma range of SECTION, return true, else false. */ 2871 2872CORE_ADDR 2873pc_in_unmapped_range (CORE_ADDR pc, asection *section) 2874{ 2875 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */ 2876 2877 int size; 2878 2879 if (overlay_debugging) 2880 if (section && section_is_overlay (section)) 2881 { 2882 size = bfd_get_section_size (section); 2883 if (section->lma <= pc && pc < section->lma + size) 2884 return 1; 2885 } 2886 return 0; 2887} 2888 2889/* Function: pc_in_mapped_range 2890 If PC falls into the vma range of SECTION, return true, else false. */ 2891 2892CORE_ADDR 2893pc_in_mapped_range (CORE_ADDR pc, asection *section) 2894{ 2895 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */ 2896 2897 int size; 2898 2899 if (overlay_debugging) 2900 if (section && section_is_overlay (section)) 2901 { 2902 size = bfd_get_section_size (section); 2903 if (section->vma <= pc && pc < section->vma + size) 2904 return 1; 2905 } 2906 return 0; 2907} 2908 2909 2910/* Return true if the mapped ranges of sections A and B overlap, false 2911 otherwise. */ 2912static int 2913sections_overlap (asection *a, asection *b) 2914{ 2915 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */ 2916 2917 CORE_ADDR a_start = a->vma; 2918 CORE_ADDR a_end = a->vma + bfd_get_section_size (a); 2919 CORE_ADDR b_start = b->vma; 2920 CORE_ADDR b_end = b->vma + bfd_get_section_size (b); 2921 2922 return (a_start < b_end && b_start < a_end); 2923} 2924 2925/* Function: overlay_unmapped_address (PC, SECTION) 2926 Returns the address corresponding to PC in the unmapped (load) range. 2927 May be the same as PC. */ 2928 2929CORE_ADDR 2930overlay_unmapped_address (CORE_ADDR pc, asection *section) 2931{ 2932 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */ 2933 2934 if (overlay_debugging) 2935 if (section && section_is_overlay (section) && 2936 pc_in_mapped_range (pc, section)) 2937 return pc + section->lma - section->vma; 2938 2939 return pc; 2940} 2941 2942/* Function: overlay_mapped_address (PC, SECTION) 2943 Returns the address corresponding to PC in the mapped (runtime) range. 2944 May be the same as PC. */ 2945 2946CORE_ADDR 2947overlay_mapped_address (CORE_ADDR pc, asection *section) 2948{ 2949 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */ 2950 2951 if (overlay_debugging) 2952 if (section && section_is_overlay (section) && 2953 pc_in_unmapped_range (pc, section)) 2954 return pc + section->vma - section->lma; 2955 2956 return pc; 2957} 2958 2959 2960/* Function: symbol_overlayed_address 2961 Return one of two addresses (relative to the VMA or to the LMA), 2962 depending on whether the section is mapped or not. */ 2963 2964CORE_ADDR 2965symbol_overlayed_address (CORE_ADDR address, asection *section) 2966{ 2967 if (overlay_debugging) 2968 { 2969 /* If the symbol has no section, just return its regular address. */ 2970 if (section == 0) 2971 return address; 2972 /* If the symbol's section is not an overlay, just return its address */ 2973 if (!section_is_overlay (section)) 2974 return address; 2975 /* If the symbol's section is mapped, just return its address */ 2976 if (section_is_mapped (section)) 2977 return address; 2978 /* 2979 * HOWEVER: if the symbol is in an overlay section which is NOT mapped, 2980 * then return its LOADED address rather than its vma address!! 2981 */ 2982 return overlay_unmapped_address (address, section); 2983 } 2984 return address; 2985} 2986 2987/* Function: find_pc_overlay (PC) 2988 Return the best-match overlay section for PC: 2989 If PC matches a mapped overlay section's VMA, return that section. 2990 Else if PC matches an unmapped section's VMA, return that section. 2991 Else if PC matches an unmapped section's LMA, return that section. */ 2992 2993asection * 2994find_pc_overlay (CORE_ADDR pc) 2995{ 2996 struct objfile *objfile; 2997 struct obj_section *osect, *best_match = NULL; 2998 2999 if (overlay_debugging) 3000 ALL_OBJSECTIONS (objfile, osect) 3001 if (section_is_overlay (osect->the_bfd_section)) 3002 { 3003 if (pc_in_mapped_range (pc, osect->the_bfd_section)) 3004 { 3005 if (overlay_is_mapped (osect)) 3006 return osect->the_bfd_section; 3007 else 3008 best_match = osect; 3009 } 3010 else if (pc_in_unmapped_range (pc, osect->the_bfd_section)) 3011 best_match = osect; 3012 } 3013 return best_match ? best_match->the_bfd_section : NULL; 3014} 3015 3016/* Function: find_pc_mapped_section (PC) 3017 If PC falls into the VMA address range of an overlay section that is 3018 currently marked as MAPPED, return that section. Else return NULL. */ 3019 3020asection * 3021find_pc_mapped_section (CORE_ADDR pc) 3022{ 3023 struct objfile *objfile; 3024 struct obj_section *osect; 3025 3026 if (overlay_debugging) 3027 ALL_OBJSECTIONS (objfile, osect) 3028 if (pc_in_mapped_range (pc, osect->the_bfd_section) && 3029 overlay_is_mapped (osect)) 3030 return osect->the_bfd_section; 3031 3032 return NULL; 3033} 3034 3035/* Function: list_overlays_command 3036 Print a list of mapped sections and their PC ranges */ 3037 3038void 3039list_overlays_command (char *args, int from_tty) 3040{ 3041 int nmapped = 0; 3042 struct objfile *objfile; 3043 struct obj_section *osect; 3044 3045 if (overlay_debugging) 3046 ALL_OBJSECTIONS (objfile, osect) 3047 if (overlay_is_mapped (osect)) 3048 { 3049 const char *name; 3050 bfd_vma lma, vma; 3051 int size; 3052 3053 vma = bfd_section_vma (objfile->obfd, osect->the_bfd_section); 3054 lma = bfd_section_lma (objfile->obfd, osect->the_bfd_section); 3055 size = bfd_get_section_size (osect->the_bfd_section); 3056 name = bfd_section_name (objfile->obfd, osect->the_bfd_section); 3057 3058 printf_filtered ("Section %s, loaded at ", name); 3059 print_address_numeric (lma, 1, gdb_stdout); 3060 puts_filtered (" - "); 3061 print_address_numeric (lma + size, 1, gdb_stdout); 3062 printf_filtered (", mapped at "); 3063 print_address_numeric (vma, 1, gdb_stdout); 3064 puts_filtered (" - "); 3065 print_address_numeric (vma + size, 1, gdb_stdout); 3066 puts_filtered ("\n"); 3067 3068 nmapped++; 3069 } 3070 if (nmapped == 0) 3071 printf_filtered ("No sections are mapped.\n"); 3072} 3073 3074/* Function: map_overlay_command 3075 Mark the named section as mapped (ie. residing at its VMA address). */ 3076 3077void 3078map_overlay_command (char *args, int from_tty) 3079{ 3080 struct objfile *objfile, *objfile2; 3081 struct obj_section *sec, *sec2; 3082 asection *bfdsec; 3083 3084 if (!overlay_debugging) 3085 error ("\ 3086Overlay debugging not enabled. Use either the 'overlay auto' or\n\ 3087the 'overlay manual' command."); 3088 3089 if (args == 0 || *args == 0) 3090 error ("Argument required: name of an overlay section"); 3091 3092 /* First, find a section matching the user supplied argument */ 3093 ALL_OBJSECTIONS (objfile, sec) 3094 if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args)) 3095 { 3096 /* Now, check to see if the section is an overlay. */ 3097 bfdsec = sec->the_bfd_section; 3098 if (!section_is_overlay (bfdsec)) 3099 continue; /* not an overlay section */ 3100 3101 /* Mark the overlay as "mapped" */ 3102 sec->ovly_mapped = 1; 3103 3104 /* Next, make a pass and unmap any sections that are 3105 overlapped by this new section: */ 3106 ALL_OBJSECTIONS (objfile2, sec2) 3107 if (sec2->ovly_mapped 3108 && sec != sec2 3109 && sec->the_bfd_section != sec2->the_bfd_section 3110 && sections_overlap (sec->the_bfd_section, 3111 sec2->the_bfd_section)) 3112 { 3113 if (info_verbose) 3114 printf_unfiltered ("Note: section %s unmapped by overlap\n", 3115 bfd_section_name (objfile->obfd, 3116 sec2->the_bfd_section)); 3117 sec2->ovly_mapped = 0; /* sec2 overlaps sec: unmap sec2 */ 3118 } 3119 return; 3120 } 3121 error ("No overlay section called %s", args); 3122} 3123 3124/* Function: unmap_overlay_command 3125 Mark the overlay section as unmapped 3126 (ie. resident in its LMA address range, rather than the VMA range). */ 3127 3128void 3129unmap_overlay_command (char *args, int from_tty) 3130{ 3131 struct objfile *objfile; 3132 struct obj_section *sec; 3133 3134 if (!overlay_debugging) 3135 error ("\ 3136Overlay debugging not enabled. Use either the 'overlay auto' or\n\ 3137the 'overlay manual' command."); 3138 3139 if (args == 0 || *args == 0) 3140 error ("Argument required: name of an overlay section"); 3141 3142 /* First, find a section matching the user supplied argument */ 3143 ALL_OBJSECTIONS (objfile, sec) 3144 if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args)) 3145 { 3146 if (!sec->ovly_mapped) 3147 error ("Section %s is not mapped", args); 3148 sec->ovly_mapped = 0; 3149 return; 3150 } 3151 error ("No overlay section called %s", args); 3152} 3153 3154/* Function: overlay_auto_command 3155 A utility command to turn on overlay debugging. 3156 Possibly this should be done via a set/show command. */ 3157 3158static void 3159overlay_auto_command (char *args, int from_tty) 3160{ 3161 overlay_debugging = ovly_auto; 3162 enable_overlay_breakpoints (); 3163 if (info_verbose) 3164 printf_unfiltered ("Automatic overlay debugging enabled."); 3165} 3166 3167/* Function: overlay_manual_command 3168 A utility command to turn on overlay debugging. 3169 Possibly this should be done via a set/show command. */ 3170 3171static void 3172overlay_manual_command (char *args, int from_tty) 3173{ 3174 overlay_debugging = ovly_on; 3175 disable_overlay_breakpoints (); 3176 if (info_verbose) 3177 printf_unfiltered ("Overlay debugging enabled."); 3178} 3179 3180/* Function: overlay_off_command 3181 A utility command to turn on overlay debugging. 3182 Possibly this should be done via a set/show command. */ 3183 3184static void 3185overlay_off_command (char *args, int from_tty) 3186{ 3187 overlay_debugging = ovly_off; 3188 disable_overlay_breakpoints (); 3189 if (info_verbose) 3190 printf_unfiltered ("Overlay debugging disabled."); 3191} 3192 3193static void 3194overlay_load_command (char *args, int from_tty) 3195{ 3196 if (target_overlay_update) 3197 (*target_overlay_update) (NULL); 3198 else 3199 error ("This target does not know how to read its overlay state."); 3200} 3201 3202/* Function: overlay_command 3203 A place-holder for a mis-typed command */ 3204 3205/* Command list chain containing all defined "overlay" subcommands. */ 3206struct cmd_list_element *overlaylist; 3207 3208static void 3209overlay_command (char *args, int from_tty) 3210{ 3211 printf_unfiltered 3212 ("\"overlay\" must be followed by the name of an overlay command.\n"); 3213 help_list (overlaylist, "overlay ", -1, gdb_stdout); 3214} 3215 3216 3217/* Target Overlays for the "Simplest" overlay manager: 3218 3219 This is GDB's default target overlay layer. It works with the 3220 minimal overlay manager supplied as an example by Cygnus. The 3221 entry point is via a function pointer "target_overlay_update", 3222 so targets that use a different runtime overlay manager can 3223 substitute their own overlay_update function and take over the 3224 function pointer. 3225 3226 The overlay_update function pokes around in the target's data structures 3227 to see what overlays are mapped, and updates GDB's overlay mapping with 3228 this information. 3229 3230 In this simple implementation, the target data structures are as follows: 3231 unsigned _novlys; /# number of overlay sections #/ 3232 unsigned _ovly_table[_novlys][4] = { 3233 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/ 3234 {..., ..., ..., ...}, 3235 } 3236 unsigned _novly_regions; /# number of overlay regions #/ 3237 unsigned _ovly_region_table[_novly_regions][3] = { 3238 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/ 3239 {..., ..., ...}, 3240 } 3241 These functions will attempt to update GDB's mappedness state in the 3242 symbol section table, based on the target's mappedness state. 3243 3244 To do this, we keep a cached copy of the target's _ovly_table, and 3245 attempt to detect when the cached copy is invalidated. The main 3246 entry point is "simple_overlay_update(SECT), which looks up SECT in 3247 the cached table and re-reads only the entry for that section from 3248 the target (whenever possible). 3249 */ 3250 3251/* Cached, dynamically allocated copies of the target data structures: */ 3252static unsigned (*cache_ovly_table)[4] = 0; 3253#if 0 3254static unsigned (*cache_ovly_region_table)[3] = 0; 3255#endif 3256static unsigned cache_novlys = 0; 3257#if 0 3258static unsigned cache_novly_regions = 0; 3259#endif 3260static CORE_ADDR cache_ovly_table_base = 0; 3261#if 0 3262static CORE_ADDR cache_ovly_region_table_base = 0; 3263#endif 3264enum ovly_index 3265 { 3266 VMA, SIZE, LMA, MAPPED 3267 }; 3268#define TARGET_LONG_BYTES (TARGET_LONG_BIT / TARGET_CHAR_BIT) 3269 3270/* Throw away the cached copy of _ovly_table */ 3271static void 3272simple_free_overlay_table (void) 3273{ 3274 if (cache_ovly_table) 3275 xfree (cache_ovly_table); 3276 cache_novlys = 0; 3277 cache_ovly_table = NULL; 3278 cache_ovly_table_base = 0; 3279} 3280 3281#if 0 3282/* Throw away the cached copy of _ovly_region_table */ 3283static void 3284simple_free_overlay_region_table (void) 3285{ 3286 if (cache_ovly_region_table) 3287 xfree (cache_ovly_region_table); 3288 cache_novly_regions = 0; 3289 cache_ovly_region_table = NULL; 3290 cache_ovly_region_table_base = 0; 3291} 3292#endif 3293 3294/* Read an array of ints from the target into a local buffer. 3295 Convert to host order. int LEN is number of ints */ 3296static void 3297read_target_long_array (CORE_ADDR memaddr, unsigned int *myaddr, int len) 3298{ 3299 /* FIXME (alloca): Not safe if array is very large. */ 3300 char *buf = alloca (len * TARGET_LONG_BYTES); 3301 int i; 3302 3303 read_memory (memaddr, buf, len * TARGET_LONG_BYTES); 3304 for (i = 0; i < len; i++) 3305 myaddr[i] = extract_unsigned_integer (TARGET_LONG_BYTES * i + buf, 3306 TARGET_LONG_BYTES); 3307} 3308 3309/* Find and grab a copy of the target _ovly_table 3310 (and _novlys, which is needed for the table's size) */ 3311static int 3312simple_read_overlay_table (void) 3313{ 3314 struct minimal_symbol *novlys_msym, *ovly_table_msym; 3315 3316 simple_free_overlay_table (); 3317 novlys_msym = lookup_minimal_symbol ("_novlys", NULL, NULL); 3318 if (! novlys_msym) 3319 { 3320 error ("Error reading inferior's overlay table: " 3321 "couldn't find `_novlys' variable\n" 3322 "in inferior. Use `overlay manual' mode."); 3323 return 0; 3324 } 3325 3326 ovly_table_msym = lookup_minimal_symbol ("_ovly_table", NULL, NULL); 3327 if (! ovly_table_msym) 3328 { 3329 error ("Error reading inferior's overlay table: couldn't find " 3330 "`_ovly_table' array\n" 3331 "in inferior. Use `overlay manual' mode."); 3332 return 0; 3333 } 3334 3335 cache_novlys = read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym), 4); 3336 cache_ovly_table 3337 = (void *) xmalloc (cache_novlys * sizeof (*cache_ovly_table)); 3338 cache_ovly_table_base = SYMBOL_VALUE_ADDRESS (ovly_table_msym); 3339 read_target_long_array (cache_ovly_table_base, 3340 (int *) cache_ovly_table, 3341 cache_novlys * 4); 3342 3343 return 1; /* SUCCESS */ 3344} 3345 3346#if 0 3347/* Find and grab a copy of the target _ovly_region_table 3348 (and _novly_regions, which is needed for the table's size) */ 3349static int 3350simple_read_overlay_region_table (void) 3351{ 3352 struct minimal_symbol *msym; 3353 3354 simple_free_overlay_region_table (); 3355 msym = lookup_minimal_symbol ("_novly_regions", NULL, NULL); 3356 if (msym != NULL) 3357 cache_novly_regions = read_memory_integer (SYMBOL_VALUE_ADDRESS (msym), 4); 3358 else 3359 return 0; /* failure */ 3360 cache_ovly_region_table = (void *) xmalloc (cache_novly_regions * 12); 3361 if (cache_ovly_region_table != NULL) 3362 { 3363 msym = lookup_minimal_symbol ("_ovly_region_table", NULL, NULL); 3364 if (msym != NULL) 3365 { 3366 cache_ovly_region_table_base = SYMBOL_VALUE_ADDRESS (msym); 3367 read_target_long_array (cache_ovly_region_table_base, 3368 (int *) cache_ovly_region_table, 3369 cache_novly_regions * 3); 3370 } 3371 else 3372 return 0; /* failure */ 3373 } 3374 else 3375 return 0; /* failure */ 3376 return 1; /* SUCCESS */ 3377} 3378#endif 3379 3380/* Function: simple_overlay_update_1 3381 A helper function for simple_overlay_update. Assuming a cached copy 3382 of _ovly_table exists, look through it to find an entry whose vma, 3383 lma and size match those of OSECT. Re-read the entry and make sure 3384 it still matches OSECT (else the table may no longer be valid). 3385 Set OSECT's mapped state to match the entry. Return: 1 for 3386 success, 0 for failure. */ 3387 3388static int 3389simple_overlay_update_1 (struct obj_section *osect) 3390{ 3391 int i, size; 3392 bfd *obfd = osect->objfile->obfd; 3393 asection *bsect = osect->the_bfd_section; 3394 3395 size = bfd_get_section_size (osect->the_bfd_section); 3396 for (i = 0; i < cache_novlys; i++) 3397 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect) 3398 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect) 3399 /* && cache_ovly_table[i][SIZE] == size */ ) 3400 { 3401 read_target_long_array (cache_ovly_table_base + i * TARGET_LONG_BYTES, 3402 (int *) cache_ovly_table[i], 4); 3403 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect) 3404 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect) 3405 /* && cache_ovly_table[i][SIZE] == size */ ) 3406 { 3407 osect->ovly_mapped = cache_ovly_table[i][MAPPED]; 3408 return 1; 3409 } 3410 else /* Warning! Warning! Target's ovly table has changed! */ 3411 return 0; 3412 } 3413 return 0; 3414} 3415 3416/* Function: simple_overlay_update 3417 If OSECT is NULL, then update all sections' mapped state 3418 (after re-reading the entire target _ovly_table). 3419 If OSECT is non-NULL, then try to find a matching entry in the 3420 cached ovly_table and update only OSECT's mapped state. 3421 If a cached entry can't be found or the cache isn't valid, then 3422 re-read the entire cache, and go ahead and update all sections. */ 3423 3424static void 3425simple_overlay_update (struct obj_section *osect) 3426{ 3427 struct objfile *objfile; 3428 3429 /* Were we given an osect to look up? NULL means do all of them. */ 3430 if (osect) 3431 /* Have we got a cached copy of the target's overlay table? */ 3432 if (cache_ovly_table != NULL) 3433 /* Does its cached location match what's currently in the symtab? */ 3434 if (cache_ovly_table_base == 3435 SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", NULL, NULL))) 3436 /* Then go ahead and try to look up this single section in the cache */ 3437 if (simple_overlay_update_1 (osect)) 3438 /* Found it! We're done. */ 3439 return; 3440 3441 /* Cached table no good: need to read the entire table anew. 3442 Or else we want all the sections, in which case it's actually 3443 more efficient to read the whole table in one block anyway. */ 3444 3445 if (! simple_read_overlay_table ()) 3446 return; 3447 3448 /* Now may as well update all sections, even if only one was requested. */ 3449 ALL_OBJSECTIONS (objfile, osect) 3450 if (section_is_overlay (osect->the_bfd_section)) 3451 { 3452 int i, size; 3453 bfd *obfd = osect->objfile->obfd; 3454 asection *bsect = osect->the_bfd_section; 3455 3456 size = bfd_get_section_size (osect->the_bfd_section); 3457 for (i = 0; i < cache_novlys; i++) 3458 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect) 3459 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect) 3460 /* && cache_ovly_table[i][SIZE] == size */ ) 3461 { /* obj_section matches i'th entry in ovly_table */ 3462 osect->ovly_mapped = cache_ovly_table[i][MAPPED]; 3463 break; /* finished with inner for loop: break out */ 3464 } 3465 } 3466} 3467 3468/* Set the output sections and output offsets for section SECTP in 3469 ABFD. The relocation code in BFD will read these offsets, so we 3470 need to be sure they're initialized. We map each section to itself, 3471 with no offset; this means that SECTP->vma will be honored. */ 3472 3473static void 3474symfile_dummy_outputs (bfd *abfd, asection *sectp, void *dummy) 3475{ 3476 sectp->output_section = sectp; 3477 sectp->output_offset = 0; 3478} 3479 3480/* Relocate the contents of a debug section SECTP in ABFD. The 3481 contents are stored in BUF if it is non-NULL, or returned in a 3482 malloc'd buffer otherwise. 3483 3484 For some platforms and debug info formats, shared libraries contain 3485 relocations against the debug sections (particularly for DWARF-2; 3486 one affected platform is PowerPC GNU/Linux, although it depends on 3487 the version of the linker in use). Also, ELF object files naturally 3488 have unresolved relocations for their debug sections. We need to apply 3489 the relocations in order to get the locations of symbols correct. */ 3490 3491bfd_byte * 3492symfile_relocate_debug_section (bfd *abfd, asection *sectp, bfd_byte *buf) 3493{ 3494 /* We're only interested in debugging sections with relocation 3495 information. */ 3496 if ((sectp->flags & SEC_RELOC) == 0) 3497 return NULL; 3498 if ((sectp->flags & SEC_DEBUGGING) == 0) 3499 return NULL; 3500 3501 /* We will handle section offsets properly elsewhere, so relocate as if 3502 all sections begin at 0. */ 3503 bfd_map_over_sections (abfd, symfile_dummy_outputs, NULL); 3504 3505 return bfd_simple_get_relocated_section_contents (abfd, sectp, buf, NULL); 3506} 3507 3508void 3509_initialize_symfile (void) 3510{ 3511 struct cmd_list_element *c; 3512 3513 c = add_cmd ("symbol-file", class_files, symbol_file_command, 3514 "Load symbol table from executable file FILE.\n\ 3515The `file' command can also load symbol tables, as well as setting the file\n\ 3516to execute.", &cmdlist); 3517 set_cmd_completer (c, filename_completer); 3518 3519 c = add_cmd ("add-symbol-file", class_files, add_symbol_file_command, 3520 "Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR> ...]\n\ 3521Load the symbols from FILE, assuming FILE has been dynamically loaded.\n\ 3522ADDR is the starting address of the file's text.\n\ 3523The optional arguments are section-name section-address pairs and\n\ 3524should be specified if the data and bss segments are not contiguous\n\ 3525with the text. SECT is a section name to be loaded at SECT_ADDR.", 3526 &cmdlist); 3527 set_cmd_completer (c, filename_completer); 3528 3529 c = add_cmd ("add-shared-symbol-files", class_files, 3530 add_shared_symbol_files_command, 3531 "Load the symbols from shared objects in the dynamic linker's link map.", 3532 &cmdlist); 3533 c = add_alias_cmd ("assf", "add-shared-symbol-files", class_files, 1, 3534 &cmdlist); 3535 3536 c = add_cmd ("load", class_files, load_command, 3537 "Dynamically load FILE into the running program, and record its symbols\n\ 3538for access from GDB.", &cmdlist); 3539 set_cmd_completer (c, filename_completer); 3540 3541 add_show_from_set 3542 (add_set_cmd ("symbol-reloading", class_support, var_boolean, 3543 (char *) &symbol_reloading, 3544 "Set dynamic symbol table reloading multiple times in one run.", 3545 &setlist), 3546 &showlist); 3547 3548 add_prefix_cmd ("overlay", class_support, overlay_command, 3549 "Commands for debugging overlays.", &overlaylist, 3550 "overlay ", 0, &cmdlist); 3551 3552 add_com_alias ("ovly", "overlay", class_alias, 1); 3553 add_com_alias ("ov", "overlay", class_alias, 1); 3554 3555 add_cmd ("map-overlay", class_support, map_overlay_command, 3556 "Assert that an overlay section is mapped.", &overlaylist); 3557 3558 add_cmd ("unmap-overlay", class_support, unmap_overlay_command, 3559 "Assert that an overlay section is unmapped.", &overlaylist); 3560 3561 add_cmd ("list-overlays", class_support, list_overlays_command, 3562 "List mappings of overlay sections.", &overlaylist); 3563 3564 add_cmd ("manual", class_support, overlay_manual_command, 3565 "Enable overlay debugging.", &overlaylist); 3566 add_cmd ("off", class_support, overlay_off_command, 3567 "Disable overlay debugging.", &overlaylist); 3568 add_cmd ("auto", class_support, overlay_auto_command, 3569 "Enable automatic overlay debugging.", &overlaylist); 3570 add_cmd ("load-target", class_support, overlay_load_command, 3571 "Read the overlay mapping state from the target.", &overlaylist); 3572 3573 /* Filename extension to source language lookup table: */ 3574 init_filename_language_table (); 3575 c = add_set_cmd ("extension-language", class_files, var_string_noescape, 3576 (char *) &ext_args, 3577 "Set mapping between filename extension and source language.\n\ 3578Usage: set extension-language .foo bar", 3579 &setlist); 3580 set_cmd_cfunc (c, set_ext_lang_command); 3581 3582 add_info ("extensions", info_ext_lang_command, 3583 "All filename extensions associated with a source language."); 3584 3585 add_show_from_set 3586 (add_set_cmd ("download-write-size", class_obscure, 3587 var_integer, (char *) &download_write_size, 3588 "Set the write size used when downloading a program.\n" 3589 "Only used when downloading a program onto a remote\n" 3590 "target. Specify zero, or a negative value, to disable\n" 3591 "blocked writes. The actual size of each transfer is also\n" 3592 "limited by the size of the target packet and the memory\n" 3593 "cache.\n", 3594 &setlist), 3595 &showlist); 3596 3597 debug_file_directory = xstrdup (DEBUGDIR); 3598 c = (add_set_cmd 3599 ("debug-file-directory", class_support, var_string, 3600 (char *) &debug_file_directory, 3601 "Set the directory where separate debug symbols are searched for.\n" 3602 "Separate debug symbols are first searched for in the same\n" 3603 "directory as the binary, then in the `" DEBUG_SUBDIRECTORY 3604 "' subdirectory,\n" 3605 "and lastly at the path of the directory of the binary with\n" 3606 "the global debug-file directory prepended\n", 3607 &setlist)); 3608 add_show_from_set (c, &showlist); 3609 set_cmd_completer (c, filename_completer); 3610} 3611