symfile.c revision 46289
1/* Generic symbol file reading for the GNU debugger, GDB. 2 Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1998 3 Free Software Foundation, Inc. 4 Contributed by Cygnus Support, using pieces from other GDB modules. 5 6This file is part of GDB. 7 8This program is free software; you can redistribute it and/or modify 9it under the terms of the GNU General Public License as published by 10the Free Software Foundation; either version 2 of the License, or 11(at your option) any later version. 12 13This program is distributed in the hope that it will be useful, 14but WITHOUT ANY WARRANTY; without even the implied warranty of 15MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16GNU General Public License for more details. 17 18You should have received a copy of the GNU General Public License 19along with this program; if not, write to the Free Software 20Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ 21 22#include "defs.h" 23#include "symtab.h" 24#include "gdbtypes.h" 25#include "gdbcore.h" 26#include "frame.h" 27#include "target.h" 28#include "value.h" 29#include "symfile.h" 30#include "objfiles.h" 31#include "gdbcmd.h" 32#include "breakpoint.h" 33#include "language.h" 34#include "complaints.h" 35#include "demangle.h" 36#include "inferior.h" /* for write_pc */ 37#include "gdb-stabs.h" 38#include "obstack.h" 39 40#include <assert.h> 41#include <sys/types.h> 42#include <fcntl.h> 43#include "gdb_string.h" 44#include "gdb_stat.h" 45#include <ctype.h> 46#include <time.h> 47#ifdef HAVE_UNISTD_H 48#include <unistd.h> 49#endif 50 51#ifndef O_BINARY 52#define O_BINARY 0 53#endif 54 55#ifdef HPUXHPPA 56 57/* Some HP-UX related globals to clear when a new "main" 58 symbol file is loaded. HP-specific. */ 59 60extern int hp_som_som_object_present; 61extern int hp_cxx_exception_support_initialized; 62#define RESET_HP_UX_GLOBALS() do {\ 63 hp_som_som_object_present = 0; /* indicates HP-compiled code */ \ 64 hp_cxx_exception_support_initialized = 0; /* must reinitialize exception stuff */ \ 65 } while (0) 66#endif 67 68int (*ui_load_progress_hook) PARAMS ((char *, unsigned long)); 69void (*pre_add_symbol_hook) PARAMS ((char *)); 70void (*post_add_symbol_hook) PARAMS ((void)); 71 72/* Global variables owned by this file */ 73int readnow_symbol_files; /* Read full symbols immediately */ 74 75struct complaint oldsyms_complaint = { 76 "Replacing old symbols for `%s'", 0, 0 77}; 78 79struct complaint empty_symtab_complaint = { 80 "Empty symbol table found for `%s'", 0, 0 81}; 82 83/* External variables and functions referenced. */ 84 85extern int info_verbose; 86 87extern void report_transfer_performance PARAMS ((unsigned long, 88 time_t, time_t)); 89 90/* Functions this file defines */ 91 92#if 0 93static int simple_read_overlay_region_table PARAMS ((void)); 94static void simple_free_overlay_region_table PARAMS ((void)); 95#endif 96 97static void set_initial_language PARAMS ((void)); 98 99static void load_command PARAMS ((char *, int)); 100 101static void add_symbol_file_command PARAMS ((char *, int)); 102 103static void add_shared_symbol_files_command PARAMS ((char *, int)); 104 105static void cashier_psymtab PARAMS ((struct partial_symtab *)); 106 107static int compare_psymbols PARAMS ((const void *, const void *)); 108 109static int compare_symbols PARAMS ((const void *, const void *)); 110 111bfd *symfile_bfd_open PARAMS ((char *)); 112 113static void find_sym_fns PARAMS ((struct objfile *)); 114 115static void decrement_reading_symtab PARAMS ((void *)); 116 117static void overlay_invalidate_all PARAMS ((void)); 118 119static int overlay_is_mapped PARAMS ((struct obj_section *)); 120 121void list_overlays_command PARAMS ((char *, int)); 122 123void map_overlay_command PARAMS ((char *, int)); 124 125void unmap_overlay_command PARAMS ((char *, int)); 126 127static void overlay_auto_command PARAMS ((char *, int)); 128 129static void overlay_manual_command PARAMS ((char *, int)); 130 131static void overlay_off_command PARAMS ((char *, int)); 132 133static void overlay_load_command PARAMS ((char *, int)); 134 135static void overlay_command PARAMS ((char *, int)); 136 137static void simple_free_overlay_table PARAMS ((void)); 138 139static void read_target_long_array PARAMS ((CORE_ADDR, unsigned int *, int)); 140 141static int simple_read_overlay_table PARAMS ((void)); 142 143static int simple_overlay_update_1 PARAMS ((struct obj_section *)); 144 145void _initialize_symfile PARAMS ((void)); 146 147/* List of all available sym_fns. On gdb startup, each object file reader 148 calls add_symtab_fns() to register information on each format it is 149 prepared to read. */ 150 151static struct sym_fns *symtab_fns = NULL; 152 153/* Flag for whether user will be reloading symbols multiple times. 154 Defaults to ON for VxWorks, otherwise OFF. */ 155 156#ifdef SYMBOL_RELOADING_DEFAULT 157int symbol_reloading = SYMBOL_RELOADING_DEFAULT; 158#else 159int symbol_reloading = 0; 160#endif 161 162/* If non-zero, then on HP-UX (i.e., platforms that use somsolib.c), 163 this variable is interpreted as a threshhold. If adding a new 164 library's symbol table to those already known to the debugger would 165 exceed this threshhold, then the shlib's symbols are not added. 166 167 If non-zero on other platforms, shared library symbols will be added 168 automatically when the inferior is created, new libraries are loaded, 169 or when attaching to the inferior. This is almost always what users 170 will want to have happen; but for very large programs, the startup 171 time will be excessive, and so if this is a problem, the user can 172 clear this flag and then add the shared library symbols as needed. 173 Note that there is a potential for confusion, since if the shared 174 library symbols are not loaded, commands like "info fun" will *not* 175 report all the functions that are actually present. 176 177 Note that HP-UX interprets this variable to mean, "threshhold size 178 in megabytes, where zero means never add". Other platforms interpret 179 this variable to mean, "always add if non-zero, never add if zero." 180 */ 181 182int auto_solib_add = 1; 183 184 185/* Since this function is called from within qsort, in an ANSI environment 186 it must conform to the prototype for qsort, which specifies that the 187 comparison function takes two "void *" pointers. */ 188 189static int 190compare_symbols (s1p, s2p) 191 const PTR s1p; 192 const PTR s2p; 193{ 194 register struct symbol **s1, **s2; 195 196 s1 = (struct symbol **) s1p; 197 s2 = (struct symbol **) s2p; 198 199 return (STRCMP (SYMBOL_NAME (*s1), SYMBOL_NAME (*s2))); 200} 201 202/* 203 204LOCAL FUNCTION 205 206 compare_psymbols -- compare two partial symbols by name 207 208DESCRIPTION 209 210 Given pointers to pointers to two partial symbol table entries, 211 compare them by name and return -N, 0, or +N (ala strcmp). 212 Typically used by sorting routines like qsort(). 213 214NOTES 215 216 Does direct compare of first two characters before punting 217 and passing to strcmp for longer compares. Note that the 218 original version had a bug whereby two null strings or two 219 identically named one character strings would return the 220 comparison of memory following the null byte. 221 222 */ 223 224static int 225compare_psymbols (s1p, s2p) 226 const PTR s1p; 227 const PTR s2p; 228{ 229 register char *st1 = SYMBOL_NAME (*(struct partial_symbol **) s1p); 230 register char *st2 = SYMBOL_NAME (*(struct partial_symbol **) s2p); 231 232 if ((st1[0] - st2[0]) || !st1[0]) 233 { 234 return (st1[0] - st2[0]); 235 } 236 else if ((st1[1] - st2[1]) || !st1[1]) 237 { 238 return (st1[1] - st2[1]); 239 } 240 else 241 { 242 /* Note: I replaced the STRCMP line (commented out below) 243 * with a simpler "strcmp()" which compares the 2 strings 244 * from the beginning. (STRCMP is a macro which first compares 245 * the initial characters, then falls back on strcmp). 246 * The reason is that the STRCMP line was tickling a C compiler 247 * bug on HP-UX 10.30, which is avoided with the simpler 248 * code. The performance gain from the more complicated code 249 * is negligible, given that we have already checked the 250 * initial 2 characters above. I reported the compiler bug, 251 * and once it is fixed the original line can be put back. RT 252 */ 253 /* return ( STRCMP (st1 + 2, st2 + 2)); */ 254 return ( strcmp (st1, st2)); 255 } 256} 257 258void 259sort_pst_symbols (pst) 260 struct partial_symtab *pst; 261{ 262 /* Sort the global list; don't sort the static list */ 263 264 qsort (pst -> objfile -> global_psymbols.list + pst -> globals_offset, 265 pst -> n_global_syms, sizeof (struct partial_symbol *), 266 compare_psymbols); 267} 268 269/* Call sort_block_syms to sort alphabetically the symbols of one block. */ 270 271void 272sort_block_syms (b) 273 register struct block *b; 274{ 275 qsort (&BLOCK_SYM (b, 0), BLOCK_NSYMS (b), 276 sizeof (struct symbol *), compare_symbols); 277} 278 279/* Call sort_symtab_syms to sort alphabetically 280 the symbols of each block of one symtab. */ 281 282void 283sort_symtab_syms (s) 284 register struct symtab *s; 285{ 286 register struct blockvector *bv; 287 int nbl; 288 int i; 289 register struct block *b; 290 291 if (s == 0) 292 return; 293 bv = BLOCKVECTOR (s); 294 nbl = BLOCKVECTOR_NBLOCKS (bv); 295 for (i = 0; i < nbl; i++) 296 { 297 b = BLOCKVECTOR_BLOCK (bv, i); 298 if (BLOCK_SHOULD_SORT (b)) 299 sort_block_syms (b); 300 } 301} 302 303/* Make a null terminated copy of the string at PTR with SIZE characters in 304 the obstack pointed to by OBSTACKP . Returns the address of the copy. 305 Note that the string at PTR does not have to be null terminated, I.E. it 306 may be part of a larger string and we are only saving a substring. */ 307 308char * 309obsavestring (ptr, size, obstackp) 310 char *ptr; 311 int size; 312 struct obstack *obstackp; 313{ 314 register char *p = (char *) obstack_alloc (obstackp, size + 1); 315 /* Open-coded memcpy--saves function call time. These strings are usually 316 short. FIXME: Is this really still true with a compiler that can 317 inline memcpy? */ 318 { 319 register char *p1 = ptr; 320 register char *p2 = p; 321 char *end = ptr + size; 322 while (p1 != end) 323 *p2++ = *p1++; 324 } 325 p[size] = 0; 326 return p; 327} 328 329/* Concatenate strings S1, S2 and S3; return the new string. Space is found 330 in the obstack pointed to by OBSTACKP. */ 331 332char * 333obconcat (obstackp, s1, s2, s3) 334 struct obstack *obstackp; 335 const char *s1, *s2, *s3; 336{ 337 register int len = strlen (s1) + strlen (s2) + strlen (s3) + 1; 338 register char *val = (char *) obstack_alloc (obstackp, len); 339 strcpy (val, s1); 340 strcat (val, s2); 341 strcat (val, s3); 342 return val; 343} 344 345/* True if we are nested inside psymtab_to_symtab. */ 346 347int currently_reading_symtab = 0; 348 349static void 350decrement_reading_symtab (dummy) 351 void *dummy; 352{ 353 currently_reading_symtab--; 354} 355 356/* Get the symbol table that corresponds to a partial_symtab. 357 This is fast after the first time you do it. In fact, there 358 is an even faster macro PSYMTAB_TO_SYMTAB that does the fast 359 case inline. */ 360 361struct symtab * 362psymtab_to_symtab (pst) 363 register struct partial_symtab *pst; 364{ 365 /* If it's been looked up before, return it. */ 366 if (pst->symtab) 367 return pst->symtab; 368 369 /* If it has not yet been read in, read it. */ 370 if (!pst->readin) 371 { 372 struct cleanup *back_to = make_cleanup (decrement_reading_symtab, NULL); 373 currently_reading_symtab++; 374 (*pst->read_symtab) (pst); 375 do_cleanups (back_to); 376 } 377 378 return pst->symtab; 379} 380 381/* Initialize entry point information for this objfile. */ 382 383void 384init_entry_point_info (objfile) 385 struct objfile *objfile; 386{ 387 /* Save startup file's range of PC addresses to help blockframe.c 388 decide where the bottom of the stack is. */ 389 390 if (bfd_get_file_flags (objfile -> obfd) & EXEC_P) 391 { 392 /* Executable file -- record its entry point so we'll recognize 393 the startup file because it contains the entry point. */ 394 objfile -> ei.entry_point = bfd_get_start_address (objfile -> obfd); 395 } 396 else 397 { 398 /* Examination of non-executable.o files. Short-circuit this stuff. */ 399 objfile -> ei.entry_point = INVALID_ENTRY_POINT; 400 } 401 objfile -> ei.entry_file_lowpc = INVALID_ENTRY_LOWPC; 402 objfile -> ei.entry_file_highpc = INVALID_ENTRY_HIGHPC; 403 objfile -> ei.entry_func_lowpc = INVALID_ENTRY_LOWPC; 404 objfile -> ei.entry_func_highpc = INVALID_ENTRY_HIGHPC; 405 objfile -> ei.main_func_lowpc = INVALID_ENTRY_LOWPC; 406 objfile -> ei.main_func_highpc = INVALID_ENTRY_HIGHPC; 407} 408 409/* Get current entry point address. */ 410 411CORE_ADDR 412entry_point_address() 413{ 414 return symfile_objfile ? symfile_objfile->ei.entry_point : 0; 415} 416 417/* Remember the lowest-addressed loadable section we've seen. 418 This function is called via bfd_map_over_sections. 419 420 In case of equal vmas, the section with the largest size becomes the 421 lowest-addressed loadable section. 422 423 If the vmas and sizes are equal, the last section is considered the 424 lowest-addressed loadable section. */ 425 426void 427find_lowest_section (abfd, sect, obj) 428 bfd *abfd; 429 asection *sect; 430 PTR obj; 431{ 432 asection **lowest = (asection **)obj; 433 434 if (0 == (bfd_get_section_flags (abfd, sect) & SEC_LOAD)) 435 return; 436 if (!*lowest) 437 *lowest = sect; /* First loadable section */ 438 else if (bfd_section_vma (abfd, *lowest) > bfd_section_vma (abfd, sect)) 439 *lowest = sect; /* A lower loadable section */ 440 else if (bfd_section_vma (abfd, *lowest) == bfd_section_vma (abfd, sect) 441 && (bfd_section_size (abfd, (*lowest)) 442 <= bfd_section_size (abfd, sect))) 443 *lowest = sect; 444} 445 446/* Parse the user's idea of an offset for dynamic linking, into our idea 447 of how to represent it for fast symbol reading. This is the default 448 version of the sym_fns.sym_offsets function for symbol readers that 449 don't need to do anything special. It allocates a section_offsets table 450 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */ 451 452struct section_offsets * 453default_symfile_offsets (objfile, addr) 454 struct objfile *objfile; 455 CORE_ADDR addr; 456{ 457 struct section_offsets *section_offsets; 458 int i; 459 460 objfile->num_sections = SECT_OFF_MAX; 461 section_offsets = (struct section_offsets *) 462 obstack_alloc (&objfile -> psymbol_obstack, SIZEOF_SECTION_OFFSETS); 463 464 for (i = 0; i < SECT_OFF_MAX; i++) 465 ANOFFSET (section_offsets, i) = addr; 466 467 return section_offsets; 468} 469 470 471/* Process a symbol file, as either the main file or as a dynamically 472 loaded file. 473 474 NAME is the file name (which will be tilde-expanded and made 475 absolute herein) (but we don't free or modify NAME itself). 476 FROM_TTY says how verbose to be. MAINLINE specifies whether this 477 is the main symbol file, or whether it's an extra symbol file such 478 as dynamically loaded code. If !mainline, ADDR is the address 479 where the text segment was loaded. If VERBO, the caller has printed 480 a verbose message about the symbol reading (and complaints can be 481 more terse about it). */ 482 483void 484syms_from_objfile (objfile, addr, mainline, verbo) 485 struct objfile *objfile; 486 CORE_ADDR addr; 487 int mainline; 488 int verbo; 489{ 490 struct section_offsets *section_offsets; 491 asection *lowest_sect; 492 struct cleanup *old_chain; 493 494 init_entry_point_info (objfile); 495 find_sym_fns (objfile); 496 497 /* Make sure that partially constructed symbol tables will be cleaned up 498 if an error occurs during symbol reading. */ 499 old_chain = make_cleanup ((make_cleanup_func) free_objfile, objfile); 500 501 if (mainline) 502 { 503 /* We will modify the main symbol table, make sure that all its users 504 will be cleaned up if an error occurs during symbol reading. */ 505 make_cleanup ((make_cleanup_func) clear_symtab_users, 0); 506 507 /* Since no error yet, throw away the old symbol table. */ 508 509 if (symfile_objfile != NULL) 510 { 511 free_objfile (symfile_objfile); 512 symfile_objfile = NULL; 513 } 514 515 /* Currently we keep symbols from the add-symbol-file command. 516 If the user wants to get rid of them, they should do "symbol-file" 517 without arguments first. Not sure this is the best behavior 518 (PR 2207). */ 519 520 (*objfile -> sf -> sym_new_init) (objfile); 521 } 522 523 /* Convert addr into an offset rather than an absolute address. 524 We find the lowest address of a loaded segment in the objfile, 525 and assume that <addr> is where that got loaded. Due to historical 526 precedent, we warn if that doesn't happen to be a text segment. */ 527 528 if (mainline) 529 { 530 addr = 0; /* No offset from objfile addresses. */ 531 } 532 else 533 { 534 lowest_sect = bfd_get_section_by_name (objfile->obfd, ".text"); 535 if (lowest_sect == NULL) 536 bfd_map_over_sections (objfile->obfd, find_lowest_section, 537 (PTR) &lowest_sect); 538 539 if (lowest_sect == NULL) 540 warning ("no loadable sections found in added symbol-file %s", 541 objfile->name); 542 else if ((bfd_get_section_flags (objfile->obfd, lowest_sect) & SEC_CODE) 543 == 0) 544 /* FIXME-32x64--assumes bfd_vma fits in long. */ 545 warning ("Lowest section in %s is %s at 0x%lx", 546 objfile->name, 547 bfd_section_name (objfile->obfd, lowest_sect), 548 (unsigned long) bfd_section_vma (objfile->obfd, lowest_sect)); 549 550 if (lowest_sect) 551 addr -= bfd_section_vma (objfile->obfd, lowest_sect); 552 } 553 554 /* Initialize symbol reading routines for this objfile, allow complaints to 555 appear for this new file, and record how verbose to be, then do the 556 initial symbol reading for this file. */ 557 558 (*objfile -> sf -> sym_init) (objfile); 559 clear_complaints (1, verbo); 560 561 section_offsets = (*objfile -> sf -> sym_offsets) (objfile, addr); 562 objfile->section_offsets = section_offsets; 563 564#ifndef IBM6000_TARGET 565 /* This is a SVR4/SunOS specific hack, I think. In any event, it 566 screws RS/6000. sym_offsets should be doing this sort of thing, 567 because it knows the mapping between bfd sections and 568 section_offsets. */ 569 /* This is a hack. As far as I can tell, section offsets are not 570 target dependent. They are all set to addr with a couple of 571 exceptions. The exceptions are sysvr4 shared libraries, whose 572 offsets are kept in solib structures anyway and rs6000 xcoff 573 which handles shared libraries in a completely unique way. 574 575 Section offsets are built similarly, except that they are built 576 by adding addr in all cases because there is no clear mapping 577 from section_offsets into actual sections. Note that solib.c 578 has a different algorythm for finding section offsets. 579 580 These should probably all be collapsed into some target 581 independent form of shared library support. FIXME. */ 582 583 if (addr) 584 { 585 struct obj_section *s; 586 587 for (s = objfile->sections; s < objfile->sections_end; ++s) 588 { 589 s->addr -= s->offset; 590 s->addr += addr; 591 s->endaddr -= s->offset; 592 s->endaddr += addr; 593 s->offset += addr; 594 } 595 } 596#endif /* not IBM6000_TARGET */ 597 598 (*objfile -> sf -> sym_read) (objfile, section_offsets, mainline); 599 600 if (!have_partial_symbols () && !have_full_symbols ()) 601 { 602 wrap_here (""); 603 printf_filtered ("(no debugging symbols found)..."); 604 wrap_here (""); 605 } 606 607 /* Don't allow char * to have a typename (else would get caddr_t). 608 Ditto void *. FIXME: Check whether this is now done by all the 609 symbol readers themselves (many of them now do), and if so remove 610 it from here. */ 611 612 TYPE_NAME (lookup_pointer_type (builtin_type_char)) = 0; 613 TYPE_NAME (lookup_pointer_type (builtin_type_void)) = 0; 614 615 /* Mark the objfile has having had initial symbol read attempted. Note 616 that this does not mean we found any symbols... */ 617 618 objfile -> flags |= OBJF_SYMS; 619 620 /* Discard cleanups as symbol reading was successful. */ 621 622 discard_cleanups (old_chain); 623 624/* Call this after reading in a new symbol table to give target dependant code 625 a crack at the new symbols. For instance, this could be used to update the 626 values of target-specific symbols GDB needs to keep track of (such as 627 _sigtramp, or whatever). */ 628 629 TARGET_SYMFILE_POSTREAD (objfile); 630} 631 632/* Perform required actions after either reading in the initial 633 symbols for a new objfile, or mapping in the symbols from a reusable 634 objfile. */ 635 636void 637new_symfile_objfile (objfile, mainline, verbo) 638 struct objfile *objfile; 639 int mainline; 640 int verbo; 641{ 642 643 /* If this is the main symbol file we have to clean up all users of the 644 old main symbol file. Otherwise it is sufficient to fixup all the 645 breakpoints that may have been redefined by this symbol file. */ 646 if (mainline) 647 { 648 /* OK, make it the "real" symbol file. */ 649 symfile_objfile = objfile; 650 651 clear_symtab_users (); 652 } 653 else 654 { 655 breakpoint_re_set (); 656 } 657 658 /* We're done reading the symbol file; finish off complaints. */ 659 clear_complaints (0, verbo); 660} 661 662/* Process a symbol file, as either the main file or as a dynamically 663 loaded file. 664 665 NAME is the file name (which will be tilde-expanded and made 666 absolute herein) (but we don't free or modify NAME itself). 667 FROM_TTY says how verbose to be. MAINLINE specifies whether this 668 is the main symbol file, or whether it's an extra symbol file such 669 as dynamically loaded code. If !mainline, ADDR is the address 670 where the text segment was loaded. 671 672 USER_LOADED is TRUE if the add-symbol-file command was how this 673 symbol file came to be processed. 674 675 IS_SOLIB is TRUE if this symbol file represents a solib, as discovered 676 by the target's implementation of the solib package. 677 678 Upon success, returns a pointer to the objfile that was added. 679 Upon failure, jumps back to command level (never returns). */ 680 681struct objfile * 682symbol_file_add (name, from_tty, addr, mainline, mapped, readnow, user_loaded, is_solib) 683 char *name; 684 int from_tty; 685 CORE_ADDR addr; 686 int mainline; 687 int mapped; 688 int readnow; 689 int user_loaded; 690 int is_solib; 691{ 692 struct objfile *objfile; 693 struct partial_symtab *psymtab; 694 bfd *abfd; 695 696 /* Open a bfd for the file, and give user a chance to burp if we'd be 697 interactively wiping out any existing symbols. */ 698 699 abfd = symfile_bfd_open (name); 700 701 if ((have_full_symbols () || have_partial_symbols ()) 702 && mainline 703 && from_tty 704 && !query ("Load new symbol table from \"%s\"? ", name)) 705 error ("Not confirmed."); 706 707 objfile = allocate_objfile (abfd, mapped, user_loaded, is_solib); 708 709 /* If the objfile uses a mapped symbol file, and we have a psymtab for 710 it, then skip reading any symbols at this time. */ 711 712 if ((objfile -> flags & OBJF_MAPPED) && (objfile -> flags & OBJF_SYMS)) 713 { 714 /* We mapped in an existing symbol table file that already has had 715 initial symbol reading performed, so we can skip that part. Notify 716 the user that instead of reading the symbols, they have been mapped. 717 */ 718 if (from_tty || info_verbose) 719 { 720 printf_filtered ("Mapped symbols for %s...", name); 721 wrap_here (""); 722 gdb_flush (gdb_stdout); 723 } 724 init_entry_point_info (objfile); 725 find_sym_fns (objfile); 726 } 727 else 728 { 729 /* We either created a new mapped symbol table, mapped an existing 730 symbol table file which has not had initial symbol reading 731 performed, or need to read an unmapped symbol table. */ 732 if (from_tty || info_verbose) 733 { 734 if (pre_add_symbol_hook) 735 pre_add_symbol_hook (name); 736 else 737 { 738 printf_filtered ("Reading symbols from %s...", name); 739 wrap_here (""); 740 gdb_flush (gdb_stdout); 741 } 742 } 743 syms_from_objfile (objfile, addr, mainline, from_tty); 744 } 745 746 /* We now have at least a partial symbol table. Check to see if the 747 user requested that all symbols be read on initial access via either 748 the gdb startup command line or on a per symbol file basis. Expand 749 all partial symbol tables for this objfile if so. */ 750 751 if (readnow || readnow_symbol_files) 752 { 753 if (from_tty || info_verbose) 754 { 755 printf_filtered ("expanding to full symbols..."); 756 wrap_here (""); 757 gdb_flush (gdb_stdout); 758 } 759 760 for (psymtab = objfile -> psymtabs; 761 psymtab != NULL; 762 psymtab = psymtab -> next) 763 { 764 psymtab_to_symtab (psymtab); 765 } 766 } 767 768 if (from_tty || info_verbose) 769 { 770 if (post_add_symbol_hook) 771 post_add_symbol_hook (); 772 else 773 { 774 printf_filtered ("done.\n"); 775 gdb_flush (gdb_stdout); 776 } 777 } 778 779 new_symfile_objfile (objfile, mainline, from_tty); 780 781 target_new_objfile (objfile); 782 783 return (objfile); 784} 785 786/* This is the symbol-file command. Read the file, analyze its 787 symbols, and add a struct symtab to a symtab list. The syntax of 788 the command is rather bizarre--(1) buildargv implements various 789 quoting conventions which are undocumented and have little or 790 nothing in common with the way things are quoted (or not quoted) 791 elsewhere in GDB, (2) options are used, which are not generally 792 used in GDB (perhaps "set mapped on", "set readnow on" would be 793 better), (3) the order of options matters, which is contrary to GNU 794 conventions (because it is confusing and inconvenient). */ 795 796void 797symbol_file_command (args, from_tty) 798 char *args; 799 int from_tty; 800{ 801 char **argv; 802 char *name = NULL; 803 CORE_ADDR text_relocation = 0; /* text_relocation */ 804 struct cleanup *cleanups; 805 int mapped = 0; 806 int readnow = 0; 807 808 dont_repeat (); 809 810 if (args == NULL) 811 { 812 if ((have_full_symbols () || have_partial_symbols ()) 813 && from_tty 814 && !query ("Discard symbol table from `%s'? ", 815 symfile_objfile -> name)) 816 error ("Not confirmed."); 817 free_all_objfiles (); 818 819 /* solib descriptors may have handles to objfiles. Since their 820 storage has just been released, we'd better wipe the solib 821 descriptors as well. 822 */ 823#if defined(SOLIB_RESTART) 824 SOLIB_RESTART (); 825#endif 826 827 symfile_objfile = NULL; 828 if (from_tty) 829 { 830 printf_unfiltered ("No symbol file now.\n"); 831 } 832#ifdef HPUXHPPA 833 RESET_HP_UX_GLOBALS (); 834#endif 835 } 836 else 837 { 838 if ((argv = buildargv (args)) == NULL) 839 { 840 nomem (0); 841 } 842 cleanups = make_cleanup ((make_cleanup_func) freeargv, (char *) argv); 843 while (*argv != NULL) 844 { 845 if (STREQ (*argv, "-mapped")) 846 { 847 mapped = 1; 848 } 849 else if (STREQ (*argv, "-readnow")) 850 { 851 readnow = 1; 852 } 853 else if (**argv == '-') 854 { 855 error ("unknown option `%s'", *argv); 856 } 857 else 858 { 859 char *p; 860 861 name = *argv; 862 863 /* this is for rombug remote only, to get the text relocation by 864 using link command */ 865 p = strrchr(name, '/'); 866 if (p != NULL) p++; 867 else p = name; 868 869 target_link(p, &text_relocation); 870 871 if (text_relocation == (CORE_ADDR)0) 872 return; 873 else if (text_relocation == (CORE_ADDR)-1) 874 { 875 symbol_file_add (name, from_tty, (CORE_ADDR)0, 876 1, mapped, readnow, 1, 0); 877#ifdef HPUXHPPA 878 RESET_HP_UX_GLOBALS (); 879#endif 880 } 881 else 882 symbol_file_add (name, from_tty, (CORE_ADDR)text_relocation, 883 0, mapped, readnow, 1, 0); 884 885 /* Getting new symbols may change our opinion about what is 886 frameless. */ 887 reinit_frame_cache (); 888 889 set_initial_language (); 890 } 891 argv++; 892 } 893 894 if (name == NULL) 895 { 896 error ("no symbol file name was specified"); 897 } 898 TUIDO(((TuiOpaqueFuncPtr)tuiDisplayMainFunction)); 899 do_cleanups (cleanups); 900 } 901} 902 903/* Set the initial language. 904 905 A better solution would be to record the language in the psymtab when reading 906 partial symbols, and then use it (if known) to set the language. This would 907 be a win for formats that encode the language in an easily discoverable place, 908 such as DWARF. For stabs, we can jump through hoops looking for specially 909 named symbols or try to intuit the language from the specific type of stabs 910 we find, but we can't do that until later when we read in full symbols. 911 FIXME. */ 912 913static void 914set_initial_language () 915{ 916 struct partial_symtab *pst; 917 enum language lang = language_unknown; 918 919 pst = find_main_psymtab (); 920 if (pst != NULL) 921 { 922 if (pst -> filename != NULL) 923 { 924 lang = deduce_language_from_filename (pst -> filename); 925 } 926 if (lang == language_unknown) 927 { 928 /* Make C the default language */ 929 lang = language_c; 930 } 931 set_language (lang); 932 expected_language = current_language; /* Don't warn the user */ 933 } 934} 935 936/* Open file specified by NAME and hand it off to BFD for preliminary 937 analysis. Result is a newly initialized bfd *, which includes a newly 938 malloc'd` copy of NAME (tilde-expanded and made absolute). 939 In case of trouble, error() is called. */ 940 941bfd * 942symfile_bfd_open (name) 943 char *name; 944{ 945 bfd *sym_bfd; 946 int desc; 947 char *absolute_name; 948 949 950 951 name = tilde_expand (name); /* Returns 1st new malloc'd copy */ 952 953 /* Look down path for it, allocate 2nd new malloc'd copy. */ 954 desc = openp (getenv ("PATH"), 1, name, O_RDONLY | O_BINARY, 0, &absolute_name); 955#if defined(__GO32__) || defined(_WIN32) 956 if (desc < 0) 957 { 958 char *exename = alloca (strlen (name) + 5); 959 strcat (strcpy (exename, name), ".exe"); 960 desc = openp (getenv ("PATH"), 1, exename, O_RDONLY | O_BINARY, 961 0, &absolute_name); 962 } 963#endif 964 if (desc < 0) 965 { 966 make_cleanup (free, name); 967 perror_with_name (name); 968 } 969 fcntl (desc, F_SETFD, 1); 970 free (name); /* Free 1st new malloc'd copy */ 971 name = absolute_name; /* Keep 2nd malloc'd copy in bfd */ 972 /* It'll be freed in free_objfile(). */ 973 974 sym_bfd = bfd_fdopenr (name, gnutarget, desc); 975 if (!sym_bfd) 976 { 977 close (desc); 978 make_cleanup (free, name); 979 error ("\"%s\": can't open to read symbols: %s.", name, 980 bfd_errmsg (bfd_get_error ())); 981 } 982 sym_bfd->cacheable = true; 983 984 if (!bfd_check_format (sym_bfd, bfd_object)) 985 { 986 /* FIXME: should be checking for errors from bfd_close (for one thing, 987 on error it does not free all the storage associated with the 988 bfd). */ 989 bfd_close (sym_bfd); /* This also closes desc */ 990 make_cleanup (free, name); 991 error ("\"%s\": can't read symbols: %s.", name, 992 bfd_errmsg (bfd_get_error ())); 993 } 994 return (sym_bfd); 995} 996 997/* Link a new symtab_fns into the global symtab_fns list. Called on gdb 998 startup by the _initialize routine in each object file format reader, 999 to register information about each format the the reader is prepared 1000 to handle. */ 1001 1002void 1003add_symtab_fns (sf) 1004 struct sym_fns *sf; 1005{ 1006 sf->next = symtab_fns; 1007 symtab_fns = sf; 1008} 1009 1010 1011/* Initialize to read symbols from the symbol file sym_bfd. It either 1012 returns or calls error(). The result is an initialized struct sym_fns 1013 in the objfile structure, that contains cached information about the 1014 symbol file. */ 1015 1016static void 1017find_sym_fns (objfile) 1018 struct objfile *objfile; 1019{ 1020 struct sym_fns *sf; 1021 enum bfd_flavour our_flavour = bfd_get_flavour (objfile -> obfd); 1022 char *our_target = bfd_get_target (objfile -> obfd); 1023 1024 /* Special kludge for RS/6000 and PowerMac. See xcoffread.c. */ 1025 if (STREQ (our_target, "aixcoff-rs6000") || 1026 STREQ (our_target, "xcoff-powermac")) 1027 our_flavour = (enum bfd_flavour)-1; 1028 1029 /* Special kludge for apollo. See dstread.c. */ 1030 if (STREQN (our_target, "apollo", 6)) 1031 our_flavour = (enum bfd_flavour)-2; 1032 1033 for (sf = symtab_fns; sf != NULL; sf = sf -> next) 1034 { 1035 if (our_flavour == sf -> sym_flavour) 1036 { 1037 objfile -> sf = sf; 1038 return; 1039 } 1040 } 1041 error ("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown.", 1042 bfd_get_target (objfile -> obfd)); 1043} 1044 1045/* This function runs the load command of our current target. */ 1046 1047static void 1048load_command (arg, from_tty) 1049 char *arg; 1050 int from_tty; 1051{ 1052 if (arg == NULL) 1053 arg = get_exec_file (1); 1054 target_load (arg, from_tty); 1055} 1056 1057/* This version of "load" should be usable for any target. Currently 1058 it is just used for remote targets, not inftarg.c or core files, 1059 on the theory that only in that case is it useful. 1060 1061 Avoiding xmodem and the like seems like a win (a) because we don't have 1062 to worry about finding it, and (b) On VMS, fork() is very slow and so 1063 we don't want to run a subprocess. On the other hand, I'm not sure how 1064 performance compares. */ 1065#define GENERIC_LOAD_CHUNK 256 1066#define VALIDATE_DOWNLOAD 0 1067void 1068generic_load (filename, from_tty) 1069 char *filename; 1070 int from_tty; 1071{ 1072 struct cleanup *old_cleanups; 1073 asection *s; 1074 bfd *loadfile_bfd; 1075 time_t start_time, end_time; /* Start and end times of download */ 1076 unsigned long data_count = 0; /* Number of bytes transferred to memory */ 1077 int n; 1078 unsigned long load_offset = 0; /* offset to add to vma for each section */ 1079 char buf[GENERIC_LOAD_CHUNK+8]; 1080#if VALIDATE_DOWNLOAD 1081 char verify_buffer[GENERIC_LOAD_CHUNK+8] ; 1082#endif 1083 1084 /* enable user to specify address for downloading as 2nd arg to load */ 1085 n = sscanf(filename, "%s 0x%lx", buf, &load_offset); 1086 if (n > 1 ) 1087 filename = buf; 1088 else 1089 load_offset = 0; 1090 1091 loadfile_bfd = bfd_openr (filename, gnutarget); 1092 if (loadfile_bfd == NULL) 1093 { 1094 perror_with_name (filename); 1095 return; 1096 } 1097 /* FIXME: should be checking for errors from bfd_close (for one thing, 1098 on error it does not free all the storage associated with the 1099 bfd). */ 1100 old_cleanups = make_cleanup ((make_cleanup_func) bfd_close, loadfile_bfd); 1101 1102 if (!bfd_check_format (loadfile_bfd, bfd_object)) 1103 { 1104 error ("\"%s\" is not an object file: %s", filename, 1105 bfd_errmsg (bfd_get_error ())); 1106 } 1107 1108 start_time = time (NULL); 1109 1110 for (s = loadfile_bfd->sections; s; s = s->next) 1111 { 1112 if (s->flags & SEC_LOAD) 1113 { 1114 bfd_size_type size; 1115 1116 size = bfd_get_section_size_before_reloc (s); 1117 if (size > 0) 1118 { 1119 char *buffer; 1120 struct cleanup *old_chain; 1121 bfd_vma lma; 1122 unsigned long l = size ; 1123 int err; 1124 char *sect; 1125 unsigned long sent; 1126 unsigned long len; 1127 1128 l = l > GENERIC_LOAD_CHUNK ? GENERIC_LOAD_CHUNK : l ; 1129 1130 buffer = xmalloc (size); 1131 old_chain = make_cleanup (free, buffer); 1132 1133 lma = s->lma; 1134 lma += load_offset; 1135 1136 /* Is this really necessary? I guess it gives the user something 1137 to look at during a long download. */ 1138 printf_filtered ("Loading section %s, size 0x%lx lma ", 1139 bfd_get_section_name (loadfile_bfd, s), 1140 (unsigned long) size); 1141 print_address_numeric (lma, 1, gdb_stdout); 1142 printf_filtered ("\n"); 1143 1144 bfd_get_section_contents (loadfile_bfd, s, buffer, 0, size); 1145 1146 sect = (char *) bfd_get_section_name (loadfile_bfd, s); 1147 sent = 0; 1148 do 1149 { 1150 len = (size - sent) < l ? (size - sent) : l; 1151 sent += len; 1152 err = target_write_memory (lma, buffer, len); 1153 if (ui_load_progress_hook) 1154 if (ui_load_progress_hook (sect, sent)) 1155 error ("Canceled the download"); 1156#if VALIDATE_DOWNLOAD 1157 /* Broken memories and broken monitors manifest themselves 1158 here when bring new computers to life. 1159 This doubles already slow downloads. 1160 */ 1161 if (err) break ; 1162 { 1163 target_read_memory(lma,verify_buffer,len) ; 1164 if (0 != bcmp(buffer,verify_buffer,len)) 1165 error("Download verify failed at %08x", 1166 (unsigned long)lma) ; 1167 } 1168 1169#endif 1170 data_count += len ; 1171 lma += len; 1172 buffer += len; 1173 } /* od */ 1174 while (err == 0 && sent < size); 1175 1176 if (err != 0) 1177 error ("Memory access error while loading section %s.", 1178 bfd_get_section_name (loadfile_bfd, s)); 1179 1180 do_cleanups (old_chain); 1181 } 1182 } 1183 } 1184 1185 end_time = time (NULL); 1186 { 1187 unsigned long entry ; 1188 entry = bfd_get_start_address(loadfile_bfd) ; 1189 printf_filtered ("Start address 0x%lx , load size %d\n", entry,data_count); 1190 /* We were doing this in remote-mips.c, I suspect it is right 1191 for other targets too. */ 1192 write_pc (entry); 1193 } 1194 1195 /* FIXME: are we supposed to call symbol_file_add or not? According to 1196 a comment from remote-mips.c (where a call to symbol_file_add was 1197 commented out), making the call confuses GDB if more than one file is 1198 loaded in. remote-nindy.c had no call to symbol_file_add, but remote-vx.c 1199 does. */ 1200 1201 report_transfer_performance (data_count, start_time, end_time); 1202 1203 do_cleanups (old_cleanups); 1204} 1205 1206/* Report how fast the transfer went. */ 1207 1208void 1209report_transfer_performance (data_count, start_time, end_time) 1210unsigned long data_count; 1211time_t start_time, end_time; 1212{ 1213 printf_filtered ("Transfer rate: "); 1214 if (end_time != start_time) 1215 printf_filtered ("%d bits/sec", 1216 (data_count * 8) / (end_time - start_time)); 1217 else 1218 printf_filtered ("%d bits in <1 sec", (data_count * 8)); 1219 printf_filtered (".\n"); 1220} 1221 1222/* This function allows the addition of incrementally linked object files. 1223 It does not modify any state in the target, only in the debugger. */ 1224 1225/* ARGSUSED */ 1226static void 1227add_symbol_file_command (args, from_tty) 1228 char *args; 1229 int from_tty; 1230{ 1231 char *name = NULL; 1232 CORE_ADDR text_addr; 1233 char *arg; 1234 int readnow = 0; 1235 int mapped = 0; 1236 1237 dont_repeat (); 1238 1239 if (args == NULL) 1240 { 1241 error ("add-symbol-file takes a file name and an address"); 1242 } 1243 1244 /* Make a copy of the string that we can safely write into. */ 1245 1246 args = strdup (args); 1247 make_cleanup (free, args); 1248 1249 /* Pick off any -option args and the file name. */ 1250 1251 while ((*args != '\000') && (name == NULL)) 1252 { 1253 while (isspace (*args)) {args++;} 1254 arg = args; 1255 while ((*args != '\000') && !isspace (*args)) {args++;} 1256 if (*args != '\000') 1257 { 1258 *args++ = '\000'; 1259 } 1260 if (*arg != '-') 1261 { 1262 name = arg; 1263 } 1264 else if (STREQ (arg, "-mapped")) 1265 { 1266 mapped = 1; 1267 } 1268 else if (STREQ (arg, "-readnow")) 1269 { 1270 readnow = 1; 1271 } 1272 else 1273 { 1274 error ("unknown option `%s'", arg); 1275 } 1276 } 1277 1278 /* After picking off any options and the file name, args should be 1279 left pointing at the remainder of the command line, which should 1280 be the address expression to evaluate. */ 1281 1282 if (name == NULL) 1283 { 1284 error ("add-symbol-file takes a file name"); 1285 } 1286 name = tilde_expand (name); 1287 make_cleanup (free, name); 1288 1289 if (*args != '\000') 1290 { 1291 text_addr = parse_and_eval_address (args); 1292 } 1293 else 1294 { 1295 target_link(name, &text_addr); 1296 if (text_addr == (CORE_ADDR)-1) 1297 error("Don't know how to get text start location for this file"); 1298 } 1299 1300 /* FIXME-32x64: Assumes text_addr fits in a long. */ 1301 if ((from_tty) 1302 && (!query ("add symbol table from file \"%s\" at text_addr = %s?\n", 1303 name, local_hex_string ((unsigned long)text_addr)))) 1304 error ("Not confirmed."); 1305 1306 symbol_file_add (name, from_tty, text_addr, 0, mapped, readnow, 1307 1, /* user_loaded */ 1308 0); /* We'll guess it's ! is_solib */ 1309 1310 /* Getting new symbols may change our opinion about what is 1311 frameless. */ 1312 reinit_frame_cache (); 1313} 1314 1315static void 1316add_shared_symbol_files_command (args, from_tty) 1317 char *args; 1318 int from_tty; 1319{ 1320#ifdef ADD_SHARED_SYMBOL_FILES 1321 ADD_SHARED_SYMBOL_FILES (args, from_tty); 1322#else 1323 error ("This command is not available in this configuration of GDB."); 1324#endif 1325} 1326 1327/* Re-read symbols if a symbol-file has changed. */ 1328void 1329reread_symbols () 1330{ 1331 struct objfile *objfile; 1332 long new_modtime; 1333 int reread_one = 0; 1334 struct stat new_statbuf; 1335 int res; 1336 1337 /* With the addition of shared libraries, this should be modified, 1338 the load time should be saved in the partial symbol tables, since 1339 different tables may come from different source files. FIXME. 1340 This routine should then walk down each partial symbol table 1341 and see if the symbol table that it originates from has been changed */ 1342 1343 for (objfile = object_files; objfile; objfile = objfile->next) { 1344 if (objfile->obfd) { 1345#ifdef IBM6000_TARGET 1346 /* If this object is from a shared library, then you should 1347 stat on the library name, not member name. */ 1348 1349 if (objfile->obfd->my_archive) 1350 res = stat (objfile->obfd->my_archive->filename, &new_statbuf); 1351 else 1352#endif 1353 res = stat (objfile->name, &new_statbuf); 1354 if (res != 0) { 1355 /* FIXME, should use print_sys_errmsg but it's not filtered. */ 1356 printf_filtered ("`%s' has disappeared; keeping its symbols.\n", 1357 objfile->name); 1358 continue; 1359 } 1360 new_modtime = new_statbuf.st_mtime; 1361 if (new_modtime != objfile->mtime) 1362 { 1363 struct cleanup *old_cleanups; 1364 struct section_offsets *offsets; 1365 int num_offsets; 1366 int section_offsets_size; 1367 char *obfd_filename; 1368 1369 printf_filtered ("`%s' has changed; re-reading symbols.\n", 1370 objfile->name); 1371 1372 /* There are various functions like symbol_file_add, 1373 symfile_bfd_open, syms_from_objfile, etc., which might 1374 appear to do what we want. But they have various other 1375 effects which we *don't* want. So we just do stuff 1376 ourselves. We don't worry about mapped files (for one thing, 1377 any mapped file will be out of date). */ 1378 1379 /* If we get an error, blow away this objfile (not sure if 1380 that is the correct response for things like shared 1381 libraries). */ 1382 old_cleanups = make_cleanup ((make_cleanup_func) free_objfile, 1383 objfile); 1384 /* We need to do this whenever any symbols go away. */ 1385 make_cleanup ((make_cleanup_func) clear_symtab_users, 0); 1386 1387 /* Clean up any state BFD has sitting around. We don't need 1388 to close the descriptor but BFD lacks a way of closing the 1389 BFD without closing the descriptor. */ 1390 obfd_filename = bfd_get_filename (objfile->obfd); 1391 if (!bfd_close (objfile->obfd)) 1392 error ("Can't close BFD for %s: %s", objfile->name, 1393 bfd_errmsg (bfd_get_error ())); 1394 objfile->obfd = bfd_openr (obfd_filename, gnutarget); 1395 if (objfile->obfd == NULL) 1396 error ("Can't open %s to read symbols.", objfile->name); 1397 /* bfd_openr sets cacheable to true, which is what we want. */ 1398 if (!bfd_check_format (objfile->obfd, bfd_object)) 1399 error ("Can't read symbols from %s: %s.", objfile->name, 1400 bfd_errmsg (bfd_get_error ())); 1401 1402 /* Save the offsets, we will nuke them with the rest of the 1403 psymbol_obstack. */ 1404 num_offsets = objfile->num_sections; 1405 section_offsets_size = 1406 sizeof (struct section_offsets) 1407 + sizeof (objfile->section_offsets->offsets) * num_offsets; 1408 offsets = (struct section_offsets *) alloca (section_offsets_size); 1409 memcpy (offsets, objfile->section_offsets, section_offsets_size); 1410 1411 /* Nuke all the state that we will re-read. Much of the following 1412 code which sets things to NULL really is necessary to tell 1413 other parts of GDB that there is nothing currently there. */ 1414 1415 /* FIXME: Do we have to free a whole linked list, or is this 1416 enough? */ 1417 if (objfile->global_psymbols.list) 1418 mfree (objfile->md, objfile->global_psymbols.list); 1419 memset (&objfile -> global_psymbols, 0, 1420 sizeof (objfile -> global_psymbols)); 1421 if (objfile->static_psymbols.list) 1422 mfree (objfile->md, objfile->static_psymbols.list); 1423 memset (&objfile -> static_psymbols, 0, 1424 sizeof (objfile -> static_psymbols)); 1425 1426 /* Free the obstacks for non-reusable objfiles */ 1427 obstack_free (&objfile -> psymbol_cache.cache, 0); 1428 memset (&objfile -> psymbol_cache, 0, 1429 sizeof (objfile -> psymbol_cache)); 1430 obstack_free (&objfile -> psymbol_obstack, 0); 1431 obstack_free (&objfile -> symbol_obstack, 0); 1432 obstack_free (&objfile -> type_obstack, 0); 1433 objfile->sections = NULL; 1434 objfile->symtabs = NULL; 1435 objfile->psymtabs = NULL; 1436 objfile->free_psymtabs = NULL; 1437 objfile->msymbols = NULL; 1438 objfile->minimal_symbol_count= 0; 1439 objfile->fundamental_types = NULL; 1440 if (objfile -> sf != NULL) 1441 { 1442 (*objfile -> sf -> sym_finish) (objfile); 1443 } 1444 1445 /* We never make this a mapped file. */ 1446 objfile -> md = NULL; 1447 /* obstack_specify_allocation also initializes the obstack so 1448 it is empty. */ 1449 obstack_specify_allocation (&objfile -> psymbol_cache.cache, 0, 0, 1450 xmalloc, free); 1451 obstack_specify_allocation (&objfile -> psymbol_obstack, 0, 0, 1452 xmalloc, free); 1453 obstack_specify_allocation (&objfile -> symbol_obstack, 0, 0, 1454 xmalloc, free); 1455 obstack_specify_allocation (&objfile -> type_obstack, 0, 0, 1456 xmalloc, free); 1457 if (build_objfile_section_table (objfile)) 1458 { 1459 error ("Can't find the file sections in `%s': %s", 1460 objfile -> name, bfd_errmsg (bfd_get_error ())); 1461 } 1462 1463 /* We use the same section offsets as from last time. I'm not 1464 sure whether that is always correct for shared libraries. */ 1465 objfile->section_offsets = (struct section_offsets *) 1466 obstack_alloc (&objfile -> psymbol_obstack, section_offsets_size); 1467 memcpy (objfile->section_offsets, offsets, section_offsets_size); 1468 objfile->num_sections = num_offsets; 1469 1470 /* What the hell is sym_new_init for, anyway? The concept of 1471 distinguishing between the main file and additional files 1472 in this way seems rather dubious. */ 1473 if (objfile == symfile_objfile) 1474 { 1475 (*objfile->sf->sym_new_init) (objfile); 1476#ifdef HPUXHPPA 1477 RESET_HP_UX_GLOBALS (); 1478#endif 1479 } 1480 1481 (*objfile->sf->sym_init) (objfile); 1482 clear_complaints (1, 1); 1483 /* The "mainline" parameter is a hideous hack; I think leaving it 1484 zero is OK since dbxread.c also does what it needs to do if 1485 objfile->global_psymbols.size is 0. */ 1486 (*objfile->sf->sym_read) (objfile, objfile->section_offsets, 0); 1487 if (!have_partial_symbols () && !have_full_symbols ()) 1488 { 1489 wrap_here (""); 1490 printf_filtered ("(no debugging symbols found)\n"); 1491 wrap_here (""); 1492 } 1493 objfile -> flags |= OBJF_SYMS; 1494 1495 /* We're done reading the symbol file; finish off complaints. */ 1496 clear_complaints (0, 1); 1497 1498 /* Getting new symbols may change our opinion about what is 1499 frameless. */ 1500 1501 reinit_frame_cache (); 1502 1503 /* Discard cleanups as symbol reading was successful. */ 1504 discard_cleanups (old_cleanups); 1505 1506 /* If the mtime has changed between the time we set new_modtime 1507 and now, we *want* this to be out of date, so don't call stat 1508 again now. */ 1509 objfile->mtime = new_modtime; 1510 reread_one = 1; 1511 1512 /* Call this after reading in a new symbol table to give target 1513 dependant code a crack at the new symbols. For instance, this 1514 could be used to update the values of target-specific symbols GDB 1515 needs to keep track of (such as _sigtramp, or whatever). */ 1516 1517 TARGET_SYMFILE_POSTREAD (objfile); 1518 } 1519 } 1520 } 1521 1522 if (reread_one) 1523 clear_symtab_users (); 1524} 1525 1526 1527 1528typedef struct { 1529 char *ext; 1530 enum language lang; 1531} filename_language; 1532 1533static filename_language * filename_language_table; 1534static int fl_table_size, fl_table_next; 1535 1536static void 1537add_filename_language (ext, lang) 1538 char *ext; 1539 enum language lang; 1540{ 1541 if (fl_table_next >= fl_table_size) 1542 { 1543 fl_table_size += 10; 1544 filename_language_table = realloc (filename_language_table, 1545 fl_table_size); 1546 } 1547 1548 filename_language_table[fl_table_next].ext = strsave (ext); 1549 filename_language_table[fl_table_next].lang = lang; 1550 fl_table_next++; 1551} 1552 1553static char *ext_args; 1554 1555static void 1556set_ext_lang_command (args, from_tty) 1557 char *args; 1558 int from_tty; 1559{ 1560 int i; 1561 char *cp = ext_args; 1562 enum language lang; 1563 1564 /* First arg is filename extension, starting with '.' */ 1565 if (*cp != '.') 1566 error ("'%s': Filename extension must begin with '.'", ext_args); 1567 1568 /* Find end of first arg. */ 1569 while (*cp && !isspace (*cp)) 1570 cp++; 1571 1572 if (*cp == '\0') 1573 error ("'%s': two arguments required -- filename extension and language", 1574 ext_args); 1575 1576 /* Null-terminate first arg */ 1577 *cp++ = '\0'; 1578 1579 /* Find beginning of second arg, which should be a source language. */ 1580 while (*cp && isspace (*cp)) 1581 cp++; 1582 1583 if (*cp == '\0') 1584 error ("'%s': two arguments required -- filename extension and language", 1585 ext_args); 1586 1587 /* Lookup the language from among those we know. */ 1588 lang = language_enum (cp); 1589 1590 /* Now lookup the filename extension: do we already know it? */ 1591 for (i = 0; i < fl_table_next; i++) 1592 if (0 == strcmp (ext_args, filename_language_table[i].ext)) 1593 break; 1594 1595 if (i >= fl_table_next) 1596 { 1597 /* new file extension */ 1598 add_filename_language (ext_args, lang); 1599 } 1600 else 1601 { 1602 /* redefining a previously known filename extension */ 1603 1604 /* if (from_tty) */ 1605 /* query ("Really make files of type %s '%s'?", */ 1606 /* ext_args, language_str (lang)); */ 1607 1608 free (filename_language_table[i].ext); 1609 filename_language_table[i].ext = strsave (ext_args); 1610 filename_language_table[i].lang = lang; 1611 } 1612} 1613 1614static void 1615info_ext_lang_command (args, from_tty) 1616 char *args; 1617 int from_tty; 1618{ 1619 int i; 1620 1621 printf_filtered ("Filename extensions and the languages they represent:"); 1622 printf_filtered ("\n\n"); 1623 for (i = 0; i < fl_table_next; i++) 1624 printf_filtered ("\t%s\t- %s\n", 1625 filename_language_table[i].ext, 1626 language_str (filename_language_table[i].lang)); 1627} 1628 1629static void 1630init_filename_language_table () 1631{ 1632 if (fl_table_size == 0) /* protect against repetition */ 1633 { 1634 fl_table_size = 20; 1635 fl_table_next = 0; 1636 filename_language_table = 1637 xmalloc (fl_table_size * sizeof (*filename_language_table)); 1638 add_filename_language (".c", language_c); 1639 add_filename_language (".C", language_cplus); 1640 add_filename_language (".cc", language_cplus); 1641 add_filename_language (".cp", language_cplus); 1642 add_filename_language (".cpp", language_cplus); 1643 add_filename_language (".cxx", language_cplus); 1644 add_filename_language (".c++", language_cplus); 1645 add_filename_language (".java", language_java); 1646 add_filename_language (".class", language_java); 1647 add_filename_language (".ch", language_chill); 1648 add_filename_language (".c186", language_chill); 1649 add_filename_language (".c286", language_chill); 1650 add_filename_language (".f", language_fortran); 1651 add_filename_language (".F", language_fortran); 1652 add_filename_language (".s", language_asm); 1653 add_filename_language (".S", language_asm); 1654 } 1655} 1656 1657enum language 1658deduce_language_from_filename (filename) 1659 char *filename; 1660{ 1661 int i; 1662 char *cp; 1663 1664 if (filename != NULL) 1665 if ((cp = strrchr (filename, '.')) != NULL) 1666 for (i = 0; i < fl_table_next; i++) 1667 if (strcmp (cp, filename_language_table[i].ext) == 0) 1668 return filename_language_table[i].lang; 1669 1670 return language_unknown; 1671} 1672 1673/* allocate_symtab: 1674 1675 Allocate and partly initialize a new symbol table. Return a pointer 1676 to it. error() if no space. 1677 1678 Caller must set these fields: 1679 LINETABLE(symtab) 1680 symtab->blockvector 1681 symtab->dirname 1682 symtab->free_code 1683 symtab->free_ptr 1684 possibly free_named_symtabs (symtab->filename); 1685 */ 1686 1687struct symtab * 1688allocate_symtab (filename, objfile) 1689 char *filename; 1690 struct objfile *objfile; 1691{ 1692 register struct symtab *symtab; 1693 1694 symtab = (struct symtab *) 1695 obstack_alloc (&objfile -> symbol_obstack, sizeof (struct symtab)); 1696 memset (symtab, 0, sizeof (*symtab)); 1697 symtab -> filename = obsavestring (filename, strlen (filename), 1698 &objfile -> symbol_obstack); 1699 symtab -> fullname = NULL; 1700 symtab -> language = deduce_language_from_filename (filename); 1701 symtab -> debugformat = obsavestring ("unknown", 7, 1702 &objfile -> symbol_obstack); 1703 1704 /* Hook it to the objfile it comes from */ 1705 1706 symtab -> objfile = objfile; 1707 symtab -> next = objfile -> symtabs; 1708 objfile -> symtabs = symtab; 1709 1710 /* FIXME: This should go away. It is only defined for the Z8000, 1711 and the Z8000 definition of this macro doesn't have anything to 1712 do with the now-nonexistent EXTRA_SYMTAB_INFO macro, it's just 1713 here for convenience. */ 1714#ifdef INIT_EXTRA_SYMTAB_INFO 1715 INIT_EXTRA_SYMTAB_INFO (symtab); 1716#endif 1717 1718 return (symtab); 1719} 1720 1721struct partial_symtab * 1722allocate_psymtab (filename, objfile) 1723 char *filename; 1724 struct objfile *objfile; 1725{ 1726 struct partial_symtab *psymtab; 1727 1728 if (objfile -> free_psymtabs) 1729 { 1730 psymtab = objfile -> free_psymtabs; 1731 objfile -> free_psymtabs = psymtab -> next; 1732 } 1733 else 1734 psymtab = (struct partial_symtab *) 1735 obstack_alloc (&objfile -> psymbol_obstack, 1736 sizeof (struct partial_symtab)); 1737 1738 memset (psymtab, 0, sizeof (struct partial_symtab)); 1739 psymtab -> filename = obsavestring (filename, strlen (filename), 1740 &objfile -> psymbol_obstack); 1741 psymtab -> symtab = NULL; 1742 1743 /* Prepend it to the psymtab list for the objfile it belongs to. 1744 Psymtabs are searched in most recent inserted -> least recent 1745 inserted order. */ 1746 1747 psymtab -> objfile = objfile; 1748 psymtab -> next = objfile -> psymtabs; 1749 objfile -> psymtabs = psymtab; 1750#if 0 1751 { 1752 struct partial_symtab **prev_pst; 1753 psymtab -> objfile = objfile; 1754 psymtab -> next = NULL; 1755 prev_pst = &(objfile -> psymtabs); 1756 while ((*prev_pst) != NULL) 1757 prev_pst = &((*prev_pst) -> next); 1758 (*prev_pst) = psymtab; 1759 } 1760#endif 1761 1762 return (psymtab); 1763} 1764 1765void 1766discard_psymtab (pst) 1767 struct partial_symtab *pst; 1768{ 1769 struct partial_symtab **prev_pst; 1770 1771 /* From dbxread.c: 1772 Empty psymtabs happen as a result of header files which don't 1773 have any symbols in them. There can be a lot of them. But this 1774 check is wrong, in that a psymtab with N_SLINE entries but 1775 nothing else is not empty, but we don't realize that. Fixing 1776 that without slowing things down might be tricky. */ 1777 1778 /* First, snip it out of the psymtab chain */ 1779 1780 prev_pst = &(pst->objfile->psymtabs); 1781 while ((*prev_pst) != pst) 1782 prev_pst = &((*prev_pst)->next); 1783 (*prev_pst) = pst->next; 1784 1785 /* Next, put it on a free list for recycling */ 1786 1787 pst->next = pst->objfile->free_psymtabs; 1788 pst->objfile->free_psymtabs = pst; 1789} 1790 1791 1792/* Reset all data structures in gdb which may contain references to symbol 1793 table data. */ 1794 1795void 1796clear_symtab_users () 1797{ 1798 /* Someday, we should do better than this, by only blowing away 1799 the things that really need to be blown. */ 1800 clear_value_history (); 1801 clear_displays (); 1802 clear_internalvars (); 1803 breakpoint_re_set (); 1804 set_default_breakpoint (0, 0, 0, 0); 1805 current_source_symtab = 0; 1806 current_source_line = 0; 1807 clear_pc_function_cache (); 1808 target_new_objfile (NULL); 1809} 1810 1811/* clear_symtab_users_once: 1812 1813 This function is run after symbol reading, or from a cleanup. 1814 If an old symbol table was obsoleted, the old symbol table 1815 has been blown away, but the other GDB data structures that may 1816 reference it have not yet been cleared or re-directed. (The old 1817 symtab was zapped, and the cleanup queued, in free_named_symtab() 1818 below.) 1819 1820 This function can be queued N times as a cleanup, or called 1821 directly; it will do all the work the first time, and then will be a 1822 no-op until the next time it is queued. This works by bumping a 1823 counter at queueing time. Much later when the cleanup is run, or at 1824 the end of symbol processing (in case the cleanup is discarded), if 1825 the queued count is greater than the "done-count", we do the work 1826 and set the done-count to the queued count. If the queued count is 1827 less than or equal to the done-count, we just ignore the call. This 1828 is needed because reading a single .o file will often replace many 1829 symtabs (one per .h file, for example), and we don't want to reset 1830 the breakpoints N times in the user's face. 1831 1832 The reason we both queue a cleanup, and call it directly after symbol 1833 reading, is because the cleanup protects us in case of errors, but is 1834 discarded if symbol reading is successful. */ 1835 1836#if 0 1837/* FIXME: As free_named_symtabs is currently a big noop this function 1838 is no longer needed. */ 1839static void 1840clear_symtab_users_once PARAMS ((void)); 1841 1842static int clear_symtab_users_queued; 1843static int clear_symtab_users_done; 1844 1845static void 1846clear_symtab_users_once () 1847{ 1848 /* Enforce once-per-`do_cleanups'-semantics */ 1849 if (clear_symtab_users_queued <= clear_symtab_users_done) 1850 return; 1851 clear_symtab_users_done = clear_symtab_users_queued; 1852 1853 clear_symtab_users (); 1854} 1855#endif 1856 1857/* Delete the specified psymtab, and any others that reference it. */ 1858 1859static void 1860cashier_psymtab (pst) 1861 struct partial_symtab *pst; 1862{ 1863 struct partial_symtab *ps, *pprev = NULL; 1864 int i; 1865 1866 /* Find its previous psymtab in the chain */ 1867 for (ps = pst->objfile->psymtabs; ps; ps = ps->next) { 1868 if (ps == pst) 1869 break; 1870 pprev = ps; 1871 } 1872 1873 if (ps) { 1874 /* Unhook it from the chain. */ 1875 if (ps == pst->objfile->psymtabs) 1876 pst->objfile->psymtabs = ps->next; 1877 else 1878 pprev->next = ps->next; 1879 1880 /* FIXME, we can't conveniently deallocate the entries in the 1881 partial_symbol lists (global_psymbols/static_psymbols) that 1882 this psymtab points to. These just take up space until all 1883 the psymtabs are reclaimed. Ditto the dependencies list and 1884 filename, which are all in the psymbol_obstack. */ 1885 1886 /* We need to cashier any psymtab that has this one as a dependency... */ 1887again: 1888 for (ps = pst->objfile->psymtabs; ps; ps = ps->next) { 1889 for (i = 0; i < ps->number_of_dependencies; i++) { 1890 if (ps->dependencies[i] == pst) { 1891 cashier_psymtab (ps); 1892 goto again; /* Must restart, chain has been munged. */ 1893 } 1894 } 1895 } 1896 } 1897} 1898 1899/* If a symtab or psymtab for filename NAME is found, free it along 1900 with any dependent breakpoints, displays, etc. 1901 Used when loading new versions of object modules with the "add-file" 1902 command. This is only called on the top-level symtab or psymtab's name; 1903 it is not called for subsidiary files such as .h files. 1904 1905 Return value is 1 if we blew away the environment, 0 if not. 1906 FIXME. The return valu appears to never be used. 1907 1908 FIXME. I think this is not the best way to do this. We should 1909 work on being gentler to the environment while still cleaning up 1910 all stray pointers into the freed symtab. */ 1911 1912int 1913free_named_symtabs (name) 1914 char *name; 1915{ 1916#if 0 1917 /* FIXME: With the new method of each objfile having it's own 1918 psymtab list, this function needs serious rethinking. In particular, 1919 why was it ever necessary to toss psymtabs with specific compilation 1920 unit filenames, as opposed to all psymtabs from a particular symbol 1921 file? -- fnf 1922 Well, the answer is that some systems permit reloading of particular 1923 compilation units. We want to blow away any old info about these 1924 compilation units, regardless of which objfiles they arrived in. --gnu. */ 1925 1926 register struct symtab *s; 1927 register struct symtab *prev; 1928 register struct partial_symtab *ps; 1929 struct blockvector *bv; 1930 int blewit = 0; 1931 1932 /* We only wack things if the symbol-reload switch is set. */ 1933 if (!symbol_reloading) 1934 return 0; 1935 1936 /* Some symbol formats have trouble providing file names... */ 1937 if (name == 0 || *name == '\0') 1938 return 0; 1939 1940 /* Look for a psymtab with the specified name. */ 1941 1942again2: 1943 for (ps = partial_symtab_list; ps; ps = ps->next) { 1944 if (STREQ (name, ps->filename)) { 1945 cashier_psymtab (ps); /* Blow it away...and its little dog, too. */ 1946 goto again2; /* Must restart, chain has been munged */ 1947 } 1948 } 1949 1950 /* Look for a symtab with the specified name. */ 1951 1952 for (s = symtab_list; s; s = s->next) 1953 { 1954 if (STREQ (name, s->filename)) 1955 break; 1956 prev = s; 1957 } 1958 1959 if (s) 1960 { 1961 if (s == symtab_list) 1962 symtab_list = s->next; 1963 else 1964 prev->next = s->next; 1965 1966 /* For now, queue a delete for all breakpoints, displays, etc., whether 1967 or not they depend on the symtab being freed. This should be 1968 changed so that only those data structures affected are deleted. */ 1969 1970 /* But don't delete anything if the symtab is empty. 1971 This test is necessary due to a bug in "dbxread.c" that 1972 causes empty symtabs to be created for N_SO symbols that 1973 contain the pathname of the object file. (This problem 1974 has been fixed in GDB 3.9x). */ 1975 1976 bv = BLOCKVECTOR (s); 1977 if (BLOCKVECTOR_NBLOCKS (bv) > 2 1978 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK)) 1979 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK))) 1980 { 1981 complain (&oldsyms_complaint, name); 1982 1983 clear_symtab_users_queued++; 1984 make_cleanup (clear_symtab_users_once, 0); 1985 blewit = 1; 1986 } else { 1987 complain (&empty_symtab_complaint, name); 1988 } 1989 1990 free_symtab (s); 1991 } 1992 else 1993 { 1994 /* It is still possible that some breakpoints will be affected 1995 even though no symtab was found, since the file might have 1996 been compiled without debugging, and hence not be associated 1997 with a symtab. In order to handle this correctly, we would need 1998 to keep a list of text address ranges for undebuggable files. 1999 For now, we do nothing, since this is a fairly obscure case. */ 2000 ; 2001 } 2002 2003 /* FIXME, what about the minimal symbol table? */ 2004 return blewit; 2005#else 2006 return (0); 2007#endif 2008} 2009 2010/* Allocate and partially fill a partial symtab. It will be 2011 completely filled at the end of the symbol list. 2012 2013 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR 2014 is the address relative to which its symbols are (incremental) or 0 2015 (normal). */ 2016 2017 2018struct partial_symtab * 2019start_psymtab_common (objfile, section_offsets, 2020 filename, textlow, global_syms, static_syms) 2021 struct objfile *objfile; 2022 struct section_offsets *section_offsets; 2023 char *filename; 2024 CORE_ADDR textlow; 2025 struct partial_symbol **global_syms; 2026 struct partial_symbol **static_syms; 2027{ 2028 struct partial_symtab *psymtab; 2029 2030 psymtab = allocate_psymtab (filename, objfile); 2031 psymtab -> section_offsets = section_offsets; 2032 psymtab -> textlow = textlow; 2033 psymtab -> texthigh = psymtab -> textlow; /* default */ 2034 psymtab -> globals_offset = global_syms - objfile -> global_psymbols.list; 2035 psymtab -> statics_offset = static_syms - objfile -> static_psymbols.list; 2036 return (psymtab); 2037} 2038 2039/* Add a symbol with a long value to a psymtab. 2040 Since one arg is a struct, we pass in a ptr and deref it (sigh). */ 2041 2042void 2043add_psymbol_to_list (name, namelength, namespace, class, list, val, coreaddr, 2044 language, objfile) 2045 char *name; 2046 int namelength; 2047 namespace_enum namespace; 2048 enum address_class class; 2049 struct psymbol_allocation_list *list; 2050 long val; /* Value as a long */ 2051 CORE_ADDR coreaddr; /* Value as a CORE_ADDR */ 2052 enum language language; 2053 struct objfile *objfile; 2054{ 2055 register struct partial_symbol *psym; 2056 char *buf = alloca (namelength + 1); 2057 /* psymbol is static so that there will be no uninitialized gaps in the 2058 structure which might contain random data, causing cache misses in 2059 bcache. */ 2060 static struct partial_symbol psymbol; 2061 2062 /* Create local copy of the partial symbol */ 2063 memcpy (buf, name, namelength); 2064 buf[namelength] = '\0'; 2065 SYMBOL_NAME (&psymbol) = bcache (buf, namelength + 1, &objfile->psymbol_cache); 2066 /* val and coreaddr are mutually exclusive, one of them *will* be zero */ 2067 if (val != 0) 2068 { 2069 SYMBOL_VALUE (&psymbol) = val; 2070 } 2071 else 2072 { 2073 SYMBOL_VALUE_ADDRESS (&psymbol) = coreaddr; 2074 } 2075 SYMBOL_SECTION (&psymbol) = 0; 2076 SYMBOL_LANGUAGE (&psymbol) = language; 2077 PSYMBOL_NAMESPACE (&psymbol) = namespace; 2078 PSYMBOL_CLASS (&psymbol) = class; 2079 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol, language); 2080 2081 /* Stash the partial symbol away in the cache */ 2082 psym = bcache (&psymbol, sizeof (struct partial_symbol), &objfile->psymbol_cache); 2083 2084 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */ 2085 if (list->next >= list->list + list->size) 2086 { 2087 extend_psymbol_list (list, objfile); 2088 } 2089 *list->next++ = psym; 2090 OBJSTAT (objfile, n_psyms++); 2091} 2092 2093/* Add a symbol with a long value to a psymtab. This differs from 2094 * add_psymbol_to_list above in taking both a mangled and a demangled 2095 * name. */ 2096 2097void 2098add_psymbol_with_dem_name_to_list (name, namelength, dem_name, dem_namelength, 2099 namespace, class, list, val, coreaddr, language, objfile) 2100 char *name; 2101 int namelength; 2102 char *dem_name; 2103 int dem_namelength; 2104 namespace_enum namespace; 2105 enum address_class class; 2106 struct psymbol_allocation_list *list; 2107 long val; /* Value as a long */ 2108 CORE_ADDR coreaddr; /* Value as a CORE_ADDR */ 2109 enum language language; 2110 struct objfile *objfile; 2111{ 2112 register struct partial_symbol *psym; 2113 char *buf = alloca (namelength + 1); 2114 /* psymbol is static so that there will be no uninitialized gaps in the 2115 structure which might contain random data, causing cache misses in 2116 bcache. */ 2117 static struct partial_symbol psymbol; 2118 2119 /* Create local copy of the partial symbol */ 2120 2121 memcpy (buf, name, namelength); 2122 buf[namelength] = '\0'; 2123 SYMBOL_NAME (&psymbol) = bcache (buf, namelength + 1, &objfile->psymbol_cache); 2124 2125 buf = alloca (dem_namelength + 1); 2126 memcpy (buf, dem_name, dem_namelength); 2127 buf[dem_namelength] = '\0'; 2128 2129 switch (language) 2130 { 2131 case language_c: 2132 case language_cplus: 2133 SYMBOL_CPLUS_DEMANGLED_NAME (&psymbol) = 2134 bcache (buf, dem_namelength + 1, &objfile->psymbol_cache); 2135 break; 2136 case language_chill: 2137 SYMBOL_CHILL_DEMANGLED_NAME (&psymbol) = 2138 bcache (buf, dem_namelength + 1, &objfile->psymbol_cache); 2139 2140 /* FIXME What should be done for the default case? Ignoring for now. */ 2141 } 2142 2143 /* val and coreaddr are mutually exclusive, one of them *will* be zero */ 2144 if (val != 0) 2145 { 2146 SYMBOL_VALUE (&psymbol) = val; 2147 } 2148 else 2149 { 2150 SYMBOL_VALUE_ADDRESS (&psymbol) = coreaddr; 2151 } 2152 SYMBOL_SECTION (&psymbol) = 0; 2153 SYMBOL_LANGUAGE (&psymbol) = language; 2154 PSYMBOL_NAMESPACE (&psymbol) = namespace; 2155 PSYMBOL_CLASS (&psymbol) = class; 2156 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol, language); 2157 2158 /* Stash the partial symbol away in the cache */ 2159 psym = bcache (&psymbol, sizeof (struct partial_symbol), &objfile->psymbol_cache); 2160 2161 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */ 2162 if (list->next >= list->list + list->size) 2163 { 2164 extend_psymbol_list (list, objfile); 2165 } 2166 *list->next++ = psym; 2167 OBJSTAT (objfile, n_psyms++); 2168} 2169 2170/* Initialize storage for partial symbols. */ 2171 2172void 2173init_psymbol_list (objfile, total_symbols) 2174 struct objfile *objfile; 2175 int total_symbols; 2176{ 2177 /* Free any previously allocated psymbol lists. */ 2178 2179 if (objfile -> global_psymbols.list) 2180 { 2181 mfree (objfile -> md, (PTR)objfile -> global_psymbols.list); 2182 } 2183 if (objfile -> static_psymbols.list) 2184 { 2185 mfree (objfile -> md, (PTR)objfile -> static_psymbols.list); 2186 } 2187 2188 /* Current best guess is that approximately a twentieth 2189 of the total symbols (in a debugging file) are global or static 2190 oriented symbols */ 2191 2192 objfile -> global_psymbols.size = total_symbols / 10; 2193 objfile -> static_psymbols.size = total_symbols / 10; 2194 2195 if (objfile -> global_psymbols.size > 0) 2196 { 2197 objfile -> global_psymbols.next = 2198 objfile -> global_psymbols.list = (struct partial_symbol **) 2199 xmmalloc (objfile -> md, (objfile -> global_psymbols.size 2200 * sizeof (struct partial_symbol *))); 2201 } 2202 if (objfile -> static_psymbols.size > 0) 2203 { 2204 objfile -> static_psymbols.next = 2205 objfile -> static_psymbols.list = (struct partial_symbol **) 2206 xmmalloc (objfile -> md, (objfile -> static_psymbols.size 2207 * sizeof (struct partial_symbol *))); 2208 } 2209} 2210 2211/* OVERLAYS: 2212 The following code implements an abstraction for debugging overlay sections. 2213 2214 The target model is as follows: 2215 1) The gnu linker will permit multiple sections to be mapped into the 2216 same VMA, each with its own unique LMA (or load address). 2217 2) It is assumed that some runtime mechanism exists for mapping the 2218 sections, one by one, from the load address into the VMA address. 2219 3) This code provides a mechanism for gdb to keep track of which 2220 sections should be considered to be mapped from the VMA to the LMA. 2221 This information is used for symbol lookup, and memory read/write. 2222 For instance, if a section has been mapped then its contents 2223 should be read from the VMA, otherwise from the LMA. 2224 2225 Two levels of debugger support for overlays are available. One is 2226 "manual", in which the debugger relies on the user to tell it which 2227 overlays are currently mapped. This level of support is 2228 implemented entirely in the core debugger, and the information about 2229 whether a section is mapped is kept in the objfile->obj_section table. 2230 2231 The second level of support is "automatic", and is only available if 2232 the target-specific code provides functionality to read the target's 2233 overlay mapping table, and translate its contents for the debugger 2234 (by updating the mapped state information in the obj_section tables). 2235 2236 The interface is as follows: 2237 User commands: 2238 overlay map <name> -- tell gdb to consider this section mapped 2239 overlay unmap <name> -- tell gdb to consider this section unmapped 2240 overlay list -- list the sections that GDB thinks are mapped 2241 overlay read-target -- get the target's state of what's mapped 2242 overlay off/manual/auto -- set overlay debugging state 2243 Functional interface: 2244 find_pc_mapped_section(pc): if the pc is in the range of a mapped 2245 section, return that section. 2246 find_pc_overlay(pc): find any overlay section that contains 2247 the pc, either in its VMA or its LMA 2248 overlay_is_mapped(sect): true if overlay is marked as mapped 2249 section_is_overlay(sect): true if section's VMA != LMA 2250 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA 2251 pc_in_unmapped_range(...): true if pc belongs to section's LMA 2252 overlay_mapped_address(...): map an address from section's LMA to VMA 2253 overlay_unmapped_address(...): map an address from section's VMA to LMA 2254 symbol_overlayed_address(...): Return a "current" address for symbol: 2255 either in VMA or LMA depending on whether 2256 the symbol's section is currently mapped 2257 */ 2258 2259/* Overlay debugging state: */ 2260 2261int overlay_debugging = 0; /* 0 == off, 1 == manual, -1 == auto */ 2262int overlay_cache_invalid = 0; /* True if need to refresh mapped state */ 2263 2264/* Target vector for refreshing overlay mapped state */ 2265static void simple_overlay_update PARAMS ((struct obj_section *)); 2266void (*target_overlay_update) PARAMS ((struct obj_section *)) 2267 = simple_overlay_update; 2268 2269/* Function: section_is_overlay (SECTION) 2270 Returns true if SECTION has VMA not equal to LMA, ie. 2271 SECTION is loaded at an address different from where it will "run". */ 2272 2273int 2274section_is_overlay (section) 2275 asection *section; 2276{ 2277 if (overlay_debugging) 2278 if (section && section->lma != 0 && 2279 section->vma != section->lma) 2280 return 1; 2281 2282 return 0; 2283} 2284 2285/* Function: overlay_invalidate_all (void) 2286 Invalidate the mapped state of all overlay sections (mark it as stale). */ 2287 2288static void 2289overlay_invalidate_all () 2290{ 2291 struct objfile *objfile; 2292 struct obj_section *sect; 2293 2294 ALL_OBJSECTIONS (objfile, sect) 2295 if (section_is_overlay (sect->the_bfd_section)) 2296 sect->ovly_mapped = -1; 2297} 2298 2299/* Function: overlay_is_mapped (SECTION) 2300 Returns true if section is an overlay, and is currently mapped. 2301 Private: public access is thru function section_is_mapped. 2302 2303 Access to the ovly_mapped flag is restricted to this function, so 2304 that we can do automatic update. If the global flag 2305 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call 2306 overlay_invalidate_all. If the mapped state of the particular 2307 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */ 2308 2309static int 2310overlay_is_mapped (osect) 2311 struct obj_section *osect; 2312{ 2313 if (osect == 0 || !section_is_overlay (osect->the_bfd_section)) 2314 return 0; 2315 2316 switch (overlay_debugging) 2317 { 2318 default: 2319 case 0: return 0; /* overlay debugging off */ 2320 case -1: /* overlay debugging automatic */ 2321 /* Unles there is a target_overlay_update function, 2322 there's really nothing useful to do here (can't really go auto) */ 2323 if (target_overlay_update) 2324 { 2325 if (overlay_cache_invalid) 2326 { 2327 overlay_invalidate_all (); 2328 overlay_cache_invalid = 0; 2329 } 2330 if (osect->ovly_mapped == -1) 2331 (*target_overlay_update) (osect); 2332 } 2333 /* fall thru to manual case */ 2334 case 1: /* overlay debugging manual */ 2335 return osect->ovly_mapped == 1; 2336 } 2337} 2338 2339/* Function: section_is_mapped 2340 Returns true if section is an overlay, and is currently mapped. */ 2341 2342int 2343section_is_mapped (section) 2344 asection *section; 2345{ 2346 struct objfile *objfile; 2347 struct obj_section *osect; 2348 2349 if (overlay_debugging) 2350 if (section && section_is_overlay (section)) 2351 ALL_OBJSECTIONS (objfile, osect) 2352 if (osect->the_bfd_section == section) 2353 return overlay_is_mapped (osect); 2354 2355 return 0; 2356} 2357 2358/* Function: pc_in_unmapped_range 2359 If PC falls into the lma range of SECTION, return true, else false. */ 2360 2361CORE_ADDR 2362pc_in_unmapped_range (pc, section) 2363 CORE_ADDR pc; 2364 asection *section; 2365{ 2366 int size; 2367 2368 if (overlay_debugging) 2369 if (section && section_is_overlay (section)) 2370 { 2371 size = bfd_get_section_size_before_reloc (section); 2372 if (section->lma <= pc && pc < section->lma + size) 2373 return 1; 2374 } 2375 return 0; 2376} 2377 2378/* Function: pc_in_mapped_range 2379 If PC falls into the vma range of SECTION, return true, else false. */ 2380 2381CORE_ADDR 2382pc_in_mapped_range (pc, section) 2383 CORE_ADDR pc; 2384 asection *section; 2385{ 2386 int size; 2387 2388 if (overlay_debugging) 2389 if (section && section_is_overlay (section)) 2390 { 2391 size = bfd_get_section_size_before_reloc (section); 2392 if (section->vma <= pc && pc < section->vma + size) 2393 return 1; 2394 } 2395 return 0; 2396} 2397 2398/* Function: overlay_unmapped_address (PC, SECTION) 2399 Returns the address corresponding to PC in the unmapped (load) range. 2400 May be the same as PC. */ 2401 2402CORE_ADDR 2403overlay_unmapped_address (pc, section) 2404 CORE_ADDR pc; 2405 asection *section; 2406{ 2407 if (overlay_debugging) 2408 if (section && section_is_overlay (section) && 2409 pc_in_mapped_range (pc, section)) 2410 return pc + section->lma - section->vma; 2411 2412 return pc; 2413} 2414 2415/* Function: overlay_mapped_address (PC, SECTION) 2416 Returns the address corresponding to PC in the mapped (runtime) range. 2417 May be the same as PC. */ 2418 2419CORE_ADDR 2420overlay_mapped_address (pc, section) 2421 CORE_ADDR pc; 2422 asection *section; 2423{ 2424 if (overlay_debugging) 2425 if (section && section_is_overlay (section) && 2426 pc_in_unmapped_range (pc, section)) 2427 return pc + section->vma - section->lma; 2428 2429 return pc; 2430} 2431 2432 2433/* Function: symbol_overlayed_address 2434 Return one of two addresses (relative to the VMA or to the LMA), 2435 depending on whether the section is mapped or not. */ 2436 2437CORE_ADDR 2438symbol_overlayed_address (address, section) 2439 CORE_ADDR address; 2440 asection *section; 2441{ 2442 if (overlay_debugging) 2443 { 2444 /* If the symbol has no section, just return its regular address. */ 2445 if (section == 0) 2446 return address; 2447 /* If the symbol's section is not an overlay, just return its address */ 2448 if (!section_is_overlay (section)) 2449 return address; 2450 /* If the symbol's section is mapped, just return its address */ 2451 if (section_is_mapped (section)) 2452 return address; 2453 /* 2454 * HOWEVER: if the symbol is in an overlay section which is NOT mapped, 2455 * then return its LOADED address rather than its vma address!! 2456 */ 2457 return overlay_unmapped_address (address, section); 2458 } 2459 return address; 2460} 2461 2462/* Function: find_pc_overlay (PC) 2463 Return the best-match overlay section for PC: 2464 If PC matches a mapped overlay section's VMA, return that section. 2465 Else if PC matches an unmapped section's VMA, return that section. 2466 Else if PC matches an unmapped section's LMA, return that section. */ 2467 2468asection * 2469find_pc_overlay (pc) 2470 CORE_ADDR pc; 2471{ 2472 struct objfile *objfile; 2473 struct obj_section *osect, *best_match = NULL; 2474 2475 if (overlay_debugging) 2476 ALL_OBJSECTIONS (objfile, osect) 2477 if (section_is_overlay (osect->the_bfd_section)) 2478 { 2479 if (pc_in_mapped_range (pc, osect->the_bfd_section)) 2480 { 2481 if (overlay_is_mapped (osect)) 2482 return osect->the_bfd_section; 2483 else 2484 best_match = osect; 2485 } 2486 else if (pc_in_unmapped_range (pc, osect->the_bfd_section)) 2487 best_match = osect; 2488 } 2489 return best_match ? best_match->the_bfd_section : NULL; 2490} 2491 2492/* Function: find_pc_mapped_section (PC) 2493 If PC falls into the VMA address range of an overlay section that is 2494 currently marked as MAPPED, return that section. Else return NULL. */ 2495 2496asection * 2497find_pc_mapped_section (pc) 2498 CORE_ADDR pc; 2499{ 2500 struct objfile *objfile; 2501 struct obj_section *osect; 2502 2503 if (overlay_debugging) 2504 ALL_OBJSECTIONS (objfile, osect) 2505 if (pc_in_mapped_range (pc, osect->the_bfd_section) && 2506 overlay_is_mapped (osect)) 2507 return osect->the_bfd_section; 2508 2509 return NULL; 2510} 2511 2512/* Function: list_overlays_command 2513 Print a list of mapped sections and their PC ranges */ 2514 2515void 2516list_overlays_command (args, from_tty) 2517 char *args; 2518 int from_tty; 2519{ 2520 int nmapped = 0; 2521 struct objfile *objfile; 2522 struct obj_section *osect; 2523 2524 if (overlay_debugging) 2525 ALL_OBJSECTIONS (objfile, osect) 2526 if (overlay_is_mapped (osect)) 2527 { 2528 const char *name; 2529 bfd_vma lma, vma; 2530 int size; 2531 2532 vma = bfd_section_vma (objfile->obfd, osect->the_bfd_section); 2533 lma = bfd_section_lma (objfile->obfd, osect->the_bfd_section); 2534 size = bfd_get_section_size_before_reloc (osect->the_bfd_section); 2535 name = bfd_section_name (objfile->obfd, osect->the_bfd_section); 2536 2537 printf_filtered ("Section %s, loaded at ", name); 2538 print_address_numeric (lma, 1, gdb_stdout); 2539 puts_filtered (" - "); 2540 print_address_numeric (lma + size, 1, gdb_stdout); 2541 printf_filtered (", mapped at "); 2542 print_address_numeric (vma, 1, gdb_stdout); 2543 puts_filtered (" - "); 2544 print_address_numeric (vma + size, 1, gdb_stdout); 2545 puts_filtered ("\n"); 2546 2547 nmapped ++; 2548 } 2549 if (nmapped == 0) 2550 printf_filtered ("No sections are mapped.\n"); 2551} 2552 2553/* Function: map_overlay_command 2554 Mark the named section as mapped (ie. residing at its VMA address). */ 2555 2556void 2557map_overlay_command (args, from_tty) 2558 char *args; 2559 int from_tty; 2560{ 2561 struct objfile *objfile, *objfile2; 2562 struct obj_section *sec, *sec2; 2563 asection *bfdsec; 2564 2565 if (!overlay_debugging) 2566 error ("Overlay debugging not enabled. Use the 'OVERLAY ON' command."); 2567 2568 if (args == 0 || *args == 0) 2569 error ("Argument required: name of an overlay section"); 2570 2571 /* First, find a section matching the user supplied argument */ 2572 ALL_OBJSECTIONS (objfile, sec) 2573 if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args)) 2574 { 2575 /* Now, check to see if the section is an overlay. */ 2576 bfdsec = sec->the_bfd_section; 2577 if (!section_is_overlay (bfdsec)) 2578 continue; /* not an overlay section */ 2579 2580 /* Mark the overlay as "mapped" */ 2581 sec->ovly_mapped = 1; 2582 2583 /* Next, make a pass and unmap any sections that are 2584 overlapped by this new section: */ 2585 ALL_OBJSECTIONS (objfile2, sec2) 2586 if (sec2->ovly_mapped && 2587 sec != sec2 && 2588 sec->the_bfd_section != sec2->the_bfd_section && 2589 (pc_in_mapped_range (sec2->addr, sec->the_bfd_section) || 2590 pc_in_mapped_range (sec2->endaddr, sec->the_bfd_section))) 2591 { 2592 if (info_verbose) 2593 printf_filtered ("Note: section %s unmapped by overlap\n", 2594 bfd_section_name (objfile->obfd, 2595 sec2->the_bfd_section)); 2596 sec2->ovly_mapped = 0; /* sec2 overlaps sec: unmap sec2 */ 2597 } 2598 return; 2599 } 2600 error ("No overlay section called %s", args); 2601} 2602 2603/* Function: unmap_overlay_command 2604 Mark the overlay section as unmapped 2605 (ie. resident in its LMA address range, rather than the VMA range). */ 2606 2607void 2608unmap_overlay_command (args, from_tty) 2609 char *args; 2610 int from_tty; 2611{ 2612 struct objfile *objfile; 2613 struct obj_section *sec; 2614 2615 if (!overlay_debugging) 2616 error ("Overlay debugging not enabled. Use the 'OVERLAY ON' command."); 2617 2618 if (args == 0 || *args == 0) 2619 error ("Argument required: name of an overlay section"); 2620 2621 /* First, find a section matching the user supplied argument */ 2622 ALL_OBJSECTIONS (objfile, sec) 2623 if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args)) 2624 { 2625 if (!sec->ovly_mapped) 2626 error ("Section %s is not mapped", args); 2627 sec->ovly_mapped = 0; 2628 return; 2629 } 2630 error ("No overlay section called %s", args); 2631} 2632 2633/* Function: overlay_auto_command 2634 A utility command to turn on overlay debugging. 2635 Possibly this should be done via a set/show command. */ 2636 2637static void 2638overlay_auto_command (args, from_tty) 2639 char *args; 2640 int from_tty; 2641{ 2642 overlay_debugging = -1; 2643 if (info_verbose) 2644 printf_filtered ("Automatic overlay debugging enabled."); 2645} 2646 2647/* Function: overlay_manual_command 2648 A utility command to turn on overlay debugging. 2649 Possibly this should be done via a set/show command. */ 2650 2651static void 2652overlay_manual_command (args, from_tty) 2653 char *args; 2654 int from_tty; 2655{ 2656 overlay_debugging = 1; 2657 if (info_verbose) 2658 printf_filtered ("Overlay debugging enabled."); 2659} 2660 2661/* Function: overlay_off_command 2662 A utility command to turn on overlay debugging. 2663 Possibly this should be done via a set/show command. */ 2664 2665static void 2666overlay_off_command (args, from_tty) 2667 char *args; 2668 int from_tty; 2669{ 2670 overlay_debugging = 0; 2671 if (info_verbose) 2672 printf_filtered ("Overlay debugging disabled."); 2673} 2674 2675static void 2676overlay_load_command (args, from_tty) 2677 char *args; 2678 int from_tty; 2679{ 2680 if (target_overlay_update) 2681 (*target_overlay_update) (NULL); 2682 else 2683 error ("This target does not know how to read its overlay state."); 2684} 2685 2686/* Function: overlay_command 2687 A place-holder for a mis-typed command */ 2688 2689/* Command list chain containing all defined "overlay" subcommands. */ 2690struct cmd_list_element *overlaylist; 2691 2692static void 2693overlay_command (args, from_tty) 2694 char *args; 2695 int from_tty; 2696{ 2697 printf_unfiltered 2698 ("\"overlay\" must be followed by the name of an overlay command.\n"); 2699 help_list (overlaylist, "overlay ", -1, gdb_stdout); 2700} 2701 2702 2703/* Target Overlays for the "Simplest" overlay manager: 2704 2705 This is GDB's default target overlay layer. It works with the 2706 minimal overlay manager supplied as an example by Cygnus. The 2707 entry point is via a function pointer "target_overlay_update", 2708 so targets that use a different runtime overlay manager can 2709 substitute their own overlay_update function and take over the 2710 function pointer. 2711 2712 The overlay_update function pokes around in the target's data structures 2713 to see what overlays are mapped, and updates GDB's overlay mapping with 2714 this information. 2715 2716 In this simple implementation, the target data structures are as follows: 2717 unsigned _novlys; /# number of overlay sections #/ 2718 unsigned _ovly_table[_novlys][4] = { 2719 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/ 2720 {..., ..., ..., ...}, 2721 } 2722 unsigned _novly_regions; /# number of overlay regions #/ 2723 unsigned _ovly_region_table[_novly_regions][3] = { 2724 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/ 2725 {..., ..., ...}, 2726 } 2727 These functions will attempt to update GDB's mappedness state in the 2728 symbol section table, based on the target's mappedness state. 2729 2730 To do this, we keep a cached copy of the target's _ovly_table, and 2731 attempt to detect when the cached copy is invalidated. The main 2732 entry point is "simple_overlay_update(SECT), which looks up SECT in 2733 the cached table and re-reads only the entry for that section from 2734 the target (whenever possible). 2735 */ 2736 2737/* Cached, dynamically allocated copies of the target data structures: */ 2738static unsigned (*cache_ovly_table)[4] = 0; 2739#if 0 2740static unsigned (*cache_ovly_region_table)[3] = 0; 2741#endif 2742static unsigned cache_novlys = 0; 2743#if 0 2744static unsigned cache_novly_regions = 0; 2745#endif 2746static CORE_ADDR cache_ovly_table_base = 0; 2747#if 0 2748static CORE_ADDR cache_ovly_region_table_base = 0; 2749#endif 2750enum ovly_index { VMA, SIZE, LMA, MAPPED}; 2751#define TARGET_LONG_BYTES (TARGET_LONG_BIT / TARGET_CHAR_BIT) 2752 2753/* Throw away the cached copy of _ovly_table */ 2754static void 2755simple_free_overlay_table () 2756{ 2757 if (cache_ovly_table) 2758 free(cache_ovly_table); 2759 cache_novlys = 0; 2760 cache_ovly_table = NULL; 2761 cache_ovly_table_base = 0; 2762} 2763 2764#if 0 2765/* Throw away the cached copy of _ovly_region_table */ 2766static void 2767simple_free_overlay_region_table () 2768{ 2769 if (cache_ovly_region_table) 2770 free(cache_ovly_region_table); 2771 cache_novly_regions = 0; 2772 cache_ovly_region_table = NULL; 2773 cache_ovly_region_table_base = 0; 2774} 2775#endif 2776 2777/* Read an array of ints from the target into a local buffer. 2778 Convert to host order. int LEN is number of ints */ 2779static void 2780read_target_long_array (memaddr, myaddr, len) 2781 CORE_ADDR memaddr; 2782 unsigned int *myaddr; 2783 int len; 2784{ 2785 char *buf = alloca (len * TARGET_LONG_BYTES); 2786 int i; 2787 2788 read_memory (memaddr, buf, len * TARGET_LONG_BYTES); 2789 for (i = 0; i < len; i++) 2790 myaddr[i] = extract_unsigned_integer (TARGET_LONG_BYTES * i + buf, 2791 TARGET_LONG_BYTES); 2792} 2793 2794/* Find and grab a copy of the target _ovly_table 2795 (and _novlys, which is needed for the table's size) */ 2796static int 2797simple_read_overlay_table () 2798{ 2799 struct minimal_symbol *msym; 2800 2801 simple_free_overlay_table (); 2802 msym = lookup_minimal_symbol ("_novlys", 0, 0); 2803 if (msym != NULL) 2804 cache_novlys = read_memory_integer (SYMBOL_VALUE_ADDRESS (msym), 4); 2805 else 2806 return 0; /* failure */ 2807 cache_ovly_table = (void *) xmalloc (cache_novlys * sizeof(*cache_ovly_table)); 2808 if (cache_ovly_table != NULL) 2809 { 2810 msym = lookup_minimal_symbol ("_ovly_table", 0, 0); 2811 if (msym != NULL) 2812 { 2813 cache_ovly_table_base = SYMBOL_VALUE_ADDRESS (msym); 2814 read_target_long_array (cache_ovly_table_base, 2815 (int *) cache_ovly_table, 2816 cache_novlys * 4); 2817 } 2818 else 2819 return 0; /* failure */ 2820 } 2821 else 2822 return 0; /* failure */ 2823 return 1; /* SUCCESS */ 2824} 2825 2826#if 0 2827/* Find and grab a copy of the target _ovly_region_table 2828 (and _novly_regions, which is needed for the table's size) */ 2829static int 2830simple_read_overlay_region_table () 2831{ 2832 struct minimal_symbol *msym; 2833 2834 simple_free_overlay_region_table (); 2835 msym = lookup_minimal_symbol ("_novly_regions", 0, 0); 2836 if (msym != NULL) 2837 cache_novly_regions = read_memory_integer (SYMBOL_VALUE_ADDRESS (msym), 4); 2838 else 2839 return 0; /* failure */ 2840 cache_ovly_region_table = (void *) xmalloc (cache_novly_regions * 12); 2841 if (cache_ovly_region_table != NULL) 2842 { 2843 msym = lookup_minimal_symbol ("_ovly_region_table", 0, 0); 2844 if (msym != NULL) 2845 { 2846 cache_ovly_region_table_base = SYMBOL_VALUE_ADDRESS (msym); 2847 read_target_long_array (cache_ovly_region_table_base, 2848 (int *) cache_ovly_region_table, 2849 cache_novly_regions * 3); 2850 } 2851 else 2852 return 0; /* failure */ 2853 } 2854 else 2855 return 0; /* failure */ 2856 return 1; /* SUCCESS */ 2857} 2858#endif 2859 2860/* Function: simple_overlay_update_1 2861 A helper function for simple_overlay_update. Assuming a cached copy 2862 of _ovly_table exists, look through it to find an entry whose vma, 2863 lma and size match those of OSECT. Re-read the entry and make sure 2864 it still matches OSECT (else the table may no longer be valid). 2865 Set OSECT's mapped state to match the entry. Return: 1 for 2866 success, 0 for failure. */ 2867 2868static int 2869simple_overlay_update_1 (osect) 2870 struct obj_section *osect; 2871{ 2872 int i, size; 2873 2874 size = bfd_get_section_size_before_reloc (osect->the_bfd_section); 2875 for (i = 0; i < cache_novlys; i++) 2876 if (cache_ovly_table[i][VMA] == osect->the_bfd_section->vma && 2877 cache_ovly_table[i][LMA] == osect->the_bfd_section->lma /* && 2878 cache_ovly_table[i][SIZE] == size */) 2879 { 2880 read_target_long_array (cache_ovly_table_base + i * TARGET_LONG_BYTES, 2881 (int *) cache_ovly_table[i], 4); 2882 if (cache_ovly_table[i][VMA] == osect->the_bfd_section->vma && 2883 cache_ovly_table[i][LMA] == osect->the_bfd_section->lma /* && 2884 cache_ovly_table[i][SIZE] == size */) 2885 { 2886 osect->ovly_mapped = cache_ovly_table[i][MAPPED]; 2887 return 1; 2888 } 2889 else /* Warning! Warning! Target's ovly table has changed! */ 2890 return 0; 2891 } 2892 return 0; 2893} 2894 2895/* Function: simple_overlay_update 2896 If OSECT is NULL, then update all sections' mapped state 2897 (after re-reading the entire target _ovly_table). 2898 If OSECT is non-NULL, then try to find a matching entry in the 2899 cached ovly_table and update only OSECT's mapped state. 2900 If a cached entry can't be found or the cache isn't valid, then 2901 re-read the entire cache, and go ahead and update all sections. */ 2902 2903static void 2904simple_overlay_update (osect) 2905 struct obj_section *osect; 2906{ 2907 struct objfile *objfile; 2908 2909 /* Were we given an osect to look up? NULL means do all of them. */ 2910 if (osect) 2911 /* Have we got a cached copy of the target's overlay table? */ 2912 if (cache_ovly_table != NULL) 2913 /* Does its cached location match what's currently in the symtab? */ 2914 if (cache_ovly_table_base == 2915 SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", 0, 0))) 2916 /* Then go ahead and try to look up this single section in the cache */ 2917 if (simple_overlay_update_1 (osect)) 2918 /* Found it! We're done. */ 2919 return; 2920 2921 /* Cached table no good: need to read the entire table anew. 2922 Or else we want all the sections, in which case it's actually 2923 more efficient to read the whole table in one block anyway. */ 2924 2925 if (simple_read_overlay_table () == 0) /* read failed? No table? */ 2926 { 2927 warning ("Failed to read the target overlay mapping table."); 2928 return; 2929 } 2930 /* Now may as well update all sections, even if only one was requested. */ 2931 ALL_OBJSECTIONS (objfile, osect) 2932 if (section_is_overlay (osect->the_bfd_section)) 2933 { 2934 int i, size; 2935 2936 size = bfd_get_section_size_before_reloc (osect->the_bfd_section); 2937 for (i = 0; i < cache_novlys; i++) 2938 if (cache_ovly_table[i][VMA] == osect->the_bfd_section->vma && 2939 cache_ovly_table[i][LMA] == osect->the_bfd_section->lma /* && 2940 cache_ovly_table[i][SIZE] == size */) 2941 { /* obj_section matches i'th entry in ovly_table */ 2942 osect->ovly_mapped = cache_ovly_table[i][MAPPED]; 2943 break; /* finished with inner for loop: break out */ 2944 } 2945 } 2946} 2947 2948 2949void 2950_initialize_symfile () 2951{ 2952 struct cmd_list_element *c; 2953 2954 c = add_cmd ("symbol-file", class_files, symbol_file_command, 2955 "Load symbol table from executable file FILE.\n\ 2956The `file' command can also load symbol tables, as well as setting the file\n\ 2957to execute.", &cmdlist); 2958 c->completer = filename_completer; 2959 2960 c = add_cmd ("add-symbol-file", class_files, add_symbol_file_command, 2961 "Usage: add-symbol-file FILE ADDR\n\ 2962Load the symbols from FILE, assuming FILE has been dynamically loaded.\n\ 2963ADDR is the starting address of the file's text.", 2964 &cmdlist); 2965 c->completer = filename_completer; 2966 2967 c = add_cmd ("add-shared-symbol-files", class_files, 2968 add_shared_symbol_files_command, 2969 "Load the symbols from shared objects in the dynamic linker's link map.", 2970 &cmdlist); 2971 c = add_alias_cmd ("assf", "add-shared-symbol-files", class_files, 1, 2972 &cmdlist); 2973 2974 c = add_cmd ("load", class_files, load_command, 2975 "Dynamically load FILE into the running program, and record its symbols\n\ 2976for access from GDB.", &cmdlist); 2977 c->completer = filename_completer; 2978 2979 add_show_from_set 2980 (add_set_cmd ("symbol-reloading", class_support, var_boolean, 2981 (char *)&symbol_reloading, 2982 "Set dynamic symbol table reloading multiple times in one run.", 2983 &setlist), 2984 &showlist); 2985 2986 add_prefix_cmd ("overlay", class_support, overlay_command, 2987 "Commands for debugging overlays.", &overlaylist, 2988 "overlay ", 0, &cmdlist); 2989 2990 add_com_alias ("ovly", "overlay", class_alias, 1); 2991 add_com_alias ("ov", "overlay", class_alias, 1); 2992 2993 add_cmd ("map-overlay", class_support, map_overlay_command, 2994 "Assert that an overlay section is mapped.", &overlaylist); 2995 2996 add_cmd ("unmap-overlay", class_support, unmap_overlay_command, 2997 "Assert that an overlay section is unmapped.", &overlaylist); 2998 2999 add_cmd ("list-overlays", class_support, list_overlays_command, 3000 "List mappings of overlay sections.", &overlaylist); 3001 3002 add_cmd ("manual", class_support, overlay_manual_command, 3003 "Enable overlay debugging.", &overlaylist); 3004 add_cmd ("off", class_support, overlay_off_command, 3005 "Disable overlay debugging.", &overlaylist); 3006 add_cmd ("auto", class_support, overlay_auto_command, 3007 "Enable automatic overlay debugging.", &overlaylist); 3008 add_cmd ("load-target", class_support, overlay_load_command, 3009 "Read the overlay mapping state from the target.", &overlaylist); 3010 3011 /* Filename extension to source language lookup table: */ 3012 init_filename_language_table (); 3013 c = add_set_cmd ("extension-language", class_files, var_string_noescape, 3014 (char *) &ext_args, 3015 "Set mapping between filename extension and source language.\n\ 3016Usage: set extension-language .foo bar", 3017 &setlist); 3018 c->function.cfunc = set_ext_lang_command; 3019 3020 add_info ("extensions", info_ext_lang_command, 3021 "All filename extensions associated with a source language."); 3022} 3023